EP4379142A1 - Vacuum cleaner with an inlet for sucking up leaves and an outlet for discharging leaves - Google Patents
Vacuum cleaner with an inlet for sucking up leaves and an outlet for discharging leaves Download PDFInfo
- Publication number
- EP4379142A1 EP4379142A1 EP23213313.2A EP23213313A EP4379142A1 EP 4379142 A1 EP4379142 A1 EP 4379142A1 EP 23213313 A EP23213313 A EP 23213313A EP 4379142 A1 EP4379142 A1 EP 4379142A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shredding
- elements
- leaves
- axis
- leaf vacuum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 238000007599 discharging Methods 0.000 title description 2
- 230000007423 decrease Effects 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000004720 fertilization Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H1/00—Removing undesirable matter from roads or like surfaces, with or without moistening of the surface
- E01H1/08—Pneumatically dislodging or taking-up undesirable matter or small objects; Drying by heat only or by streams of gas; Cleaning by projecting abrasive particles
- E01H1/0827—Dislodging by suction; Mechanical dislodging-cleaning apparatus with independent or dependent exhaust, e.g. dislodging-sweeping machines with independent suction nozzles ; Mechanical loosening devices working under vacuum
- E01H1/0836—Apparatus dislodging all of the dirt by suction ; Suction nozzles
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01H—STREET CLEANING; CLEANING OF PERMANENT WAYS; CLEANING BEACHES; DISPERSING OR PREVENTING FOG IN GENERAL CLEANING STREET OR RAILWAY FURNITURE OR TUNNEL WALLS
- E01H15/00—Removing undesirable matter, e.g. rubbish, from the land, not otherwise provided for
Definitions
- the invention relates to a leaf vacuum with an inlet for sucking in leaves and an outlet for discharging the leaves, wherein the inlet and the outlet are connected to one another via a preferably channel-shaped flow guide, and with a fan driven by a drive for generating an air flow for transporting the leaves through the flow guide from the inlet to the outlet.
- Leaf vacuums are well known in practice. These suck up the leaves and transport them into a collecting container.
- the disadvantage here is that - especially when the leaves are large and/or when the leaves are very wet - blockages can occur, particularly in the area of the outlet. In this case, operation must be stopped and the blockage removed.
- the leaves collected in the collecting container also take up a considerable volume.
- the sucked up leaves are not suitable for fertilizing or mulching due to their size.
- the object of the invention is to avoid the aforementioned disadvantages and to provide a leaf vacuum in which the risk of blockages/sticking caused by the sucked-in leaves in the area of the outlet is reduced.
- the leaf vacuum is additionally provided with a shredding device that is provided in the course of the flow guide.
- the shredding device can be designed as a tearing device in which the sucked-up material, such as leaves, is torn up.
- the leaf vacuum according to the invention has, in addition to the fan, which serves to suck in the leaves and to transport the sucked-in leaves or possibly other sucked-in objects, such as small branches, within the flow feed, a shredding device for tearing up the sucked-in material, such as the sucked-in leaves.
- the shredding device tears the sucked-in material, such as the sucked-in leaves, into smaller leaf components.
- the shredding device also ensures that leaves of greater thickness and size are torn up.
- the shredding device Since the components, such as leaf components, torn up by the shredding device are smaller than the sucked-in material, such as leaves, the torn components, such as the leaf components, can be safely transported into the collecting container via the outlet by the air flow generated by the fan. Furthermore, more material, such as leaves, can be collected in the collecting container, since the smaller dimensions of the torn components, such as leaf components, mean that the material, such as leaves, can be collected more densely. This reduces the volume, meaning that a collection container does not have to be emptied so quickly.
- the shredding device cuts the sucked-in leaves or other objects, such as small branches, to such a size that the shredded end product can be used for fertilization and mulching without further treatment.
- the shredding device can be arranged in the flow path of the leaf vacuum between the fan and the outlet.
- the shredding device is arranged in front of the fan, ie between the inlet and the fan.
- the shredding device can be arranged inside the flow guide, the flow guide forming a housing section with a circular flow cross-section at least over the length of the shredding device, and the shredding device having at least one shredding device which comprises at least one shredding element aligned orthogonally or substantially orthogonally to the housing section, and at least one shredding element of at least one shredding device is mounted in the flow guide so as to be rotatable about an axis of rotation R aligned coaxially to the housing section.
- the leaves are shredded by tearing them up by the at least one shredding element mounted so as to be rotatable about an axis of rotation R aligned coaxially to the housing section.
- several shredding elements are preferably provided.
- the distance between the shredding device closest to the inlet and the shredding device closest to the outlet can be approximately 50 cm, preferably between 20 cm and 30 cm.
- the distance between two adjacent shredding devices can be identical.
- the distance between two adjacent shredding devices can preferably be between 10 cm and 20 cm. However, it is also entirely possible for the distance between two adjacent shredding devices to decrease towards the outlet.
- At least one further comminution element can be assigned to at least one comminution element, wherein at least one of these two comminution elements is relatively movable in relation to the other comminution element and wherein the relative movement takes place in such a way that in the position in which these two comminution elements are closest to each other, a gap S remains between these two shredding elements as seen in the direction of the rotation axis R, so that the leaves can be torn by the relative displacement in the gap S in question.
- one of the two shredding elements can be arranged in a fixed position, while the other of the two shredding elements is rotatably mounted.
- both shredding elements are rotated in the same direction, but at different speeds. It is also possible for both shredding elements to rotate in different directions.
- Each additional shredding element is also aligned orthogonally or essentially orthogonally to the housing section. The tearing process can be improved by the interaction of two corresponding shredding elements, since the leaves in the respective gap are torn by the relative movement of the two corresponding shredding elements.
- An axis aligned coaxially to the housing section can be arranged in the housing section and at least one radially projecting comminution element of at least one comminution device can be attached to the axis.
- the axle can be driven by a drive.
- the housing section can be fixedly attached to the leaf vacuum.
- At least one radially aligned shredding element of at least one shredding device can be arranged on the inside of the housing section. If several shredding elements are provided, the several shredding elements can be arranged in a plane that is aligned orthogonally to the axis of rotation. Alternatively or in addition, several shredding elements can also be arranged one behind the other in the direction of the axis of rotation.
- At least two comminution elements can be arranged on the inside of the housing section for at least one comminution device, wherein the two comminution elements are arranged at a distance A from one another as seen in the direction of the rotation axis R such that the corresponding comminution element arranged on the axis can be rotated without contact between the two comminution elements arranged on the inside of the housing section, forming a gap S in each case.
- At least two comminution elements can be arranged on the inside of the housing section for at least one comminution device, wherein one of the two comminution elements belongs to a larger number of comminution elements that are arranged in a plane aligned orthogonally to the axis of rotation, and the other of the two comminution elements belongs to a larger number of other comminution elements that are arranged in another plane aligned orthogonally to the axis of rotation, wherein the two planes formed by the respective comminution elements are arranged at a distance A from one another in the direction of the axis of rotation R such that the corresponding comminution element arranged on the axis can be rotated without contact between the two comminution elements arranged on the inside of the housing section, forming a gap S in each case.
- the comminution element arranged on the axis can in turn belong to a larger number of comminution elements that are arranged in a plane aligned orthogonally to the axis of rotation R.
- both the larger number of shredding elements arranged in one plane aligned orthogonally to the rotation axis R and the larger number of shredding elements arranged in the other plane aligned orthogonally to the rotation axis R are not rotatable, i.e. stationary, while the shredding element(s) arranged on the axis rotate(s) about the rotation axis R.
- the width of the gap S can be between 0.5 mm and 7 mm, preferably between 1 mm and 4 mm, particularly preferably 2 mm.
- the width of the gap S between two comminution elements can decrease continuously or discontinuously towards the outlet.
- the width of the gap S between two comminution elements that cooperate in tearing and are arranged closer to the inlet is greater than the width of the gap S between two comminution elements that cooperate in tearing and are arranged closer to the outlet.
- coarse comminution takes place in the two comminution elements arranged closer to the inlet, while fine comminution then takes place in the gap S between two comminution elements arranged closer to the outlet.
- the width of the gap S can decrease from the comminution device facing the inlet to the comminution device facing the outlet.
- At least one shredding device can comprise at least two, preferably three, shredding elements arranged in a plane, wherein the shredding elements are arranged offset from one another by at least 30°, preferably by 120°.
- the ends of the crushing elements of at least one crushing device can be attached to a ring, preferably to a ring designed as a mounting ring. If the ring is designed as a mounting ring, the corresponding crushing elements can be attached to the axle in a rotationally fixed manner. If the ring is only intended to be a bearing in which the axle is rotatably mounted, the ring has an opening large enough for the axle to be freely rotatable therein.
- the ends of the crushing elements of at least one crushing device arranged in one plane facing the housing section can be surrounded on the outside by an outer ring.
- the crushing elements can be attached to the housing section by means of the outer ring, for example. If a ring, such as a ring designed as a mounting ring, is also provided, the outer ring is also arranged coaxially and in one plane with the ring.
- the shredding elements of two adjacent shredding devices can be arranged offset from one another, preferably offset by at least 30°.
- the offset arrangement ensures that, for example, the leaves are shredded by at least one of the four shredding devices when they pass through the housing section.
- the shredding elements of two adjacent shredding devices or even all shredding devices can be aligned with one another.
- At least one edge of the edges of the shredding elements of at least one shredding device that interact when tearing up the leaves can have a sawtooth-like corrugation. If both edges of the edges of the shredding elements of at least one shredding device that interact when tearing up the leaves have a sawtooth-like corrugation, the edge pointing in the direction of rotation D of one shredding element has the corrugation, while the edge pointing opposite to the direction of rotation D of the corresponding shredding element of this shredding device has the corrugation.
- At least one of the two areas facing each other of the shredding elements of this shredding device that cooperate when tearing up the leaves can have a sawtooth-like ribbing.
- both of the areas facing each other of the shredding elements of this shredding device that cooperate when tearing up the leaves can have a sawtooth-like ribbing.
- the corrugation is preferably aligned orthogonally to the direction of movement of the relevant area during the tearing process.
- An area is, for example, a side surface or side flank of a shredding element.
- a paddle wheel for separating the leaves can be arranged at the end of the axle facing the inlet. Separating the leaves improves the shredding result.
- the drive that drives the fan and the drive that drives the axle can be the same drive.
- the axle can rotate at a speed of between 1000 rpm and 5000 rpm, preferably at a speed of 3000 rpm.
- a gearbox with a gear ratio between 1:2 and 1:10, preferably 1:3, can be arranged between the drive and the axle.
- a collecting container can be provided at the outlet to collect the leaves that are discharged. In this way, the shredded leaves can be collected in the collecting container.
- the leaf vacuum can have at least two wheels, preferably four wheels. With such a design, the leaf vacuum is mobile and is suitable for use on private property, for example.
- the leaf vacuum is pushed by the operator.
- the leaf vacuum can also have a wheel drive. In this case, the leaf vacuum is only steered by the operator using a handle.
- the leaf vacuum can also be designed as a ride-on leaf vacuum.
- the leaf vacuum has a steering wheel, pedals and a driver's seat.
- Such a design is suitable for larger properties, for example.
- the leaf vacuum can also be designed as a leaf vacuum robot, i.e. as a fully automatic leaf vacuum.
- a leaf vacuum robot has, among other things, its own drive, an energy storage device, such as a battery, and a suitable control device. After switching on, the leaf vacuum robot works freely and independently, without the need for an operator to intervene. The actions are controlled by the control device. Software stored in the control device decides, for example, on the path of the leaf vacuum robot or on the charging times.
- the leaf vacuum is part of a car, a truck or a trailer of a truck.
- the shredding device which is designed as a tearing device, for example, is adapted to the larger quantities of leaves to be shredded. This applies, for example, to the dimensions, such as the length or diameter of the housing section, the speed, the number of shredding devices or the number of shredding elements per shredding device.
- the distance between two adjacent shredding devices can be identical.
- the distance between two adjacent shredding devices can preferably be between 10 cm and 50 cm. However, it is also entirely possible for the distance between two adjacent shredding devices to decrease towards the outlet.
- the width of the gap S can be between 0.5 mm and 7 mm, preferably between 1 mm and 4 mm, particularly preferably 2 mm.
- a detection device connected to a control device, such as an optical detection device, in the area of the inlet. If the detection device For example, if a lantern is detected, the inlet is guided around the lantern without contact using the control device.
- Fig.1 shows a leaf vacuum according to the invention with an inlet 1 for sucking in leaves and an outlet 2 for dispensing the leaves, the inlet 1 and the outlet 2 being connected to one another via a channel-shaped flow guide 3.
- a collecting container 4 for receiving the dispensed leaves is provided at the outlet 2.
- the collecting container 4 can be dismantled for emptying, for example by unhooking.
- a closable opening in the collecting container 4 is also possible, for example.
- the leaf vacuum has four wheels 26. If at least one wheel 26 is driven, the leaf vacuum is self-propelled.
- the leaf vacuum also has a handle 5.
- the leaf vacuum comprises a fan 7 driven by a drive 6 for generating an air flow for transporting the leaves through the flow guide 3 from the inlet 1 to the outlet 2.
- the fan 7 is designed as a radial fan.
- the leaf vacuum is additionally provided with a shredding device 8, which is provided in the course of the flow guide 3.
- the shredding device 8 is arranged in the course of the flow guide 3 of the leaf vacuum between the fan 7 and the outlet 2.
- the shredding device 8 is arranged inside the flow guide 3.
- the flow guide 3 forms at least a housing section 9 having a circular flow cross-section over the length of the shredding device 8.
- the housing section 9 is immovably attached to the leaf vacuum.
- the shredding device 8 itself has - as for example Fig.2 shows - seen in the direction of the rotation axis R - four crushing devices 10 arranged one behind the other.
- Each crushing device 10 comprises several crushing elements 11 aligned orthogonally to the housing section 9.
- an axis 12 is arranged which is aligned coaxially to the housing section 9 and forms the axis of rotation R.
- the axis 12 can be driven by means of a drive 13.
- the drive 6 of the fan 7 and the drive of the axle 12 are the same drive.
- the drive 6 is attached to one end of the shaft of the fan 7.
- the drive 6 is connected to the axle 12 via a V-belt 14 and drives the axle 12.
- the leaf vacuum it is advisable for the leaf vacuum to also have an external housing (not shown) which extends, for example, from the transition from the fan 7 to the drive 6 on the one hand to at least the right of the V-belt 14 on the other hand and encloses at least both sides and the top of the leaf vacuum.
- an external housing (not shown) which extends, for example, from the transition from the fan 7 to the drive 6 on the one hand to at least the right of the V-belt 14 on the other hand and encloses at least both sides and the top of the leaf vacuum.
- Such a housing would thus enclose the drive 6 and the V-belt 14, among other things. In this way, noise emissions are reduced on the one hand.
- the housing serves as protection against the rotating V-belt 14.
- a separate drive 13 is assigned to the axis 12.
- the drive 13 acts directly on the end of the axis 12 protruding from the flow guide 3 and sets the axis 12 in a rotational movement.
- Fig.8 shows an oblique side view of the channel-shaped housing section 9 and the drive 13 arranged at a distance next to it.
- Fig.8 The end of the housing section 9 pointing diagonally downwards to the right is - as for example in Fig.1 shown - facing the inlet 1 and the in Fig.8
- the end of the housing section 9 pointing diagonally upwards to the left faces the outlet 2.
- the leaves that are sucked up and to be shredded flow through the housing section 9 from right to left.
- FIG.8 The end of the housing section 9 pointing diagonally upwards to the left is connected to a channel-shaped housing (not shown) so that the shredded leaves are blown into the collecting container 4.
- Fig.8 The remaining flow guide 3 is connected to the end of the housing section 9 pointing diagonally downwards to the right.
- the gap-shaped circumferential free space between the flow guide 3 and the Fig.8 A cover plate (not shown) is provided which completely encloses and thus covers the free space at the end of the housing section 9 which points diagonally downwards to the right and in which a pulley 15 guiding the V-belt 14 is also arranged.
- the cover plate has two openings through which the V-belt 14 is guided out of the free space.
- the axle 12 can rotate at a speed between 1000 rpm and 5000 rpm, preferably at a speed of 3000 rpm.
- the desired gear ratio between the respective drive and the axle 12 can be set, such as 1:2 to 1:10, preferably 1:3.
- each of the four crushing devices 10 at least one further crushing element 11 is assigned to a crushing element 11, wherein one of these two crushing elements 11 is relatively movable in relation to the other crushing element 11.
- the relative movement takes place in such a way that in the position in which these two crushing elements 11 are closest to each other, seen in the direction of the axis of rotation R a gap S remains between these two shredding elements 11, so that the leaves are torn by the relative displacement in the respective gap S.
- Fig.6 shows in the form of an exploded view the basic structure of one of the four shredding devices 10.
- Fig.6 can be seen, are at the Fig.6
- Three radially projecting shredding elements 11 are attached to each of the four shredding devices 10 on a rotating axis 12 (not shown).
- the three shredding elements 11 of each shredding device 10 are arranged in one plane, with the angle between the shredding elements 11 being 120°.
- the plane is aligned orthogonal to the axis of rotation R and thus also to the axis 12.
- the three shredding elements 11 of each shredding device 10 thus form a Mercedes star lying in one plane.
- the ends of the three shredding elements 11 arranged in one plane facing away from the housing section 9 are attached to a ring 16 which is designed as a mounting ring.
- Each ring 16 designed as a mounting ring is attached to the axis 12 in a rotationally fixed manner.
- each of these mounting rings has a groove 17 which interacts with a corresponding projection on the axis 12.
- the three shredding elements 11 of each shredding device 10 are firmly attached to the axis 12 and rotate when the axis 12 rotates.
- Fig.4 shows, three crushing elements 11 arranged in a plane are attached to each mounting ring designed as a ring 16, the three crushing elements 11 being arranged offset by 120° from one another within the plane.
- axis 12 On the axis 12, four mounting rings each designed as a ring 16, each with three crushing elements 11 arranged offset by 120° from one another, are arranged. When the axis 12 rotates, the total of 12 crushing elements 11 rotate with it.
- the axis 12 is aligned coaxially with the housing section 9.
- the axis 12 forms the rotation axis R, which is aligned coaxially with the housing section 9.
- each of the four shredding devices 10 further has on the inside of the housing section 9 fixed, also radially aligned shredding elements 11.
- the shredding elements 11 of a shredding device 10 are arranged in two planes aligned orthogonally to the axis of rotation R on the inside of the housing section 9 and fastened to the inside of the housing section 9.
- the shredding elements 11 of two planes are arranged at a distance A from one another, viewed in the direction of the axis of rotation R, such that the corresponding shredding elements 11 arranged in one plane on the axis 12 can be rotated without contact between the two shredding elements 11 arranged on the inside of the housing section and fastened to the inside of the housing section 9, each forming a gap S.
- three shredding elements 11 are arranged in one plane, the angle between the shredding elements 11 in one plane being 120°.
- Three shredding elements 11 of a shredding device 10 each form a Mercedes star lying in one plane.
- each of the comminution elements 11 of each comminution device 10 arranged in a plane facing away from the housing section 9 are each fastened to a ring 16.
- each ring 16 has an opening large enough for the axle 12 passing through it to rotate freely.
- a suitable bearing (not shown) is provided in the area of each opening so that the axle 12 can rotate in the housing section 9 with as little friction as possible.
- the ends of the comminution elements 11 of each comminution device 10 arranged in a plane facing toward the housing section 9 are surrounded on the outside by an outer ring 18.
- Each outer ring 18 is arranged coaxially and in a plane with the corresponding ring 16.
- Each outer ring 18 is in contact with the inside of the housing section 9 and is screwed to the housing section 9 by means of screws 19. Since the housing section 9 is immovably attached to the leaf vacuum, the total of eight outer rings 18 and consequently also the shredding elements 11 arranged on each outer ring 18 are immovably attached to the leaf vacuum.
- Fig.5 an embodiment is shown in which on the inside of the housing section 9 to the shredding device 10 at least two comminution elements 11 are arranged and fastened to this via the respective mounting ring 18, wherein the left outer comminution element 11 belongs to a larger number of comminution elements 11 - in this case three comminution elements 11 - which are arranged in a plane aligned orthogonally to the axis of rotation R, and the right outer comminution element 11 belongs to a larger number of other comminution elements 11 - in this case three comminution elements 11 - which are arranged in another plane aligned orthogonally to the axis of rotation R.
- the left outer comminution element 11 belongs to a larger number of comminution elements 11 - in this case three comminution elements 11 - which are arranged in a plane aligned orthogonally to the axis of rotation R
- the right outer comminution element 11 belongs to a larger number of other comminution elements
- the two planes formed by the respective comminution elements 11 are arranged at a distance A from one another, viewed in the direction of the axis of rotation R, such that the corresponding comminution element 11 arranged on the axis 12 can be rotated without contact between the two comminution elements 11 arranged on the inside of the housing section 9, forming a gap S in each case.
- the crushing element 11 arranged on the axis 12 - in Fig.5 the middle crushing element 11 - in turn belongs to a larger number of crushing elements 11 - in this case three crushing elements 11 - which are arranged in a plane aligned orthogonal to the axis of rotation R.
- the leaves are sucked in via the fan 7 and reach the shredding device 8 via the flow guide 3.
- the leaves hit the rotating axle 12 with the shredding elements 11 attached to it.
- a relative movement occurs due to the rotation of the axle 12 and thus the rotation of the shredding elements 11 on the one hand and the fixed shredding elements 11 attached to the housing section 9 on the other.
- the leaves are torn up by the shredding elements 11 of each of the four shredding devices 10, which move relative to one another, and are thus shredded.
- the relative movement takes place in such a way that in the position in which two interacting crushing elements 11 are closest to each other, a gap S remains between these two crushing elements 11 as seen in the direction of the rotation axis R.
- a gap S remains between these two crushing elements 11 as seen in the direction of the rotation axis R.
- Fig.5 in which the gap S is shown.
- the leaves are torn by the relative displacement in the gap S in question.
- the width of the gap S is between 0.5 mm and 7 mm, preferably between 1 mm and 4 mm, particularly preferably 2 mm.
- a total of four shredding devices 10 are provided. Since the leaves pass through all four shredding devices 10 on the way from the inlet 1 to the outlet 2, the leaves or the already shredded leaves are shredded or further shredded a total of four times by tearing.
- the number of shredding devices 10 depends on the size of the leaves sucked in and the desired degree of shredding and must be selected accordingly. Of course, the number of shredding elements arranged in one plane can also be selected differently.
- the crushing elements 11 of adjacent crushing devices 10 can be aligned in the direction of the rotation axis R. Then the crushing elements 11 of these crushing devices 10 have the same alignment with respect to the axis 12.
- An alternative embodiment is shown in Fig.4 shown. How Fig.4 As can be seen, in this embodiment the shredding elements 11 of adjacent shredding devices 10 are arranged offset from one another in the direction of the axis 12, preferably offset from one another by at least 30°. The offset arrangement ensures that, for example, the leaves are shredded by at least one of the four shredding devices 10 when passing through the housing section 9.
- the two edges of the shredding elements 11 that interact when tearing the leaves have a sawtooth-like ribbing.
- the edge pointing in the direction of rotation D is provided with the ribbing, while in the case of the corresponding shredding elements 11 that are fixed to the housing section 8, the edge pointing against the direction of rotation D has the ribbing.
- the ribbing The shredding elements 11 promote tearing, since the material to be shredded is somewhat "held” for tearing by the grooved edges of the interacting shredding elements 11 and is then torn by the relative movement.
- the shredding elements 11 have a rather elongated design, with the respective edge that acts during tearing being straight. Of course, other designs are also possible, such as a sickle-shaped edge.
- the shredding device 10 shown corresponds in its basic structure to the design according to Fig.6 .
- the areas of the shredding elements 11 that face each other and interact when tearing up the leaves have a sawtooth-like corrugation 24.
- one area is a side surface or side flank of a shredding element 11.
- the three shredding elements 11 that form the Mercedes star that is attached to the shaft 12 in a rotationally fixed manner each have a corrugation 24 on both of their side surfaces.
- the two groups of three shredding elements 11 that each form the Mercedes star that is attached to the inside of the housing section 9 in a rotationally fixed manner only have a corrugation 27 in the form of a flank corrugation on the side surface that faces the three shredding elements 11 that are attached to the shaft 12 in a rotationally fixed manner.
- the corrugation 27 is aligned orthogonally to the direction of movement, which in the embodiment shown corresponds to the direction of rotation D, of the area in question during the tearing process.
- the axis 12 protrudes with one end from the flow guide 3, which is curved in this area, and has the disk 15 at its protruding end, which carries the V-belt 14.
- the drive 6 has a shaft 20 protruding from the drive 6 on both sides.
- the fan 7 is attached to one end.
- the opposite end of the shaft 20 is guided through the collecting container 4 and has a disk 21 around which the V-belt 14 is guided.
- a holding element 23 is provided, which in the illustrated embodiment is mounted on the rear outside of the collecting container 4.
- the holding element 23 has a bearing 24 through which the shaft 12 is guided, and a bearing 25 through which the shaft 20 is guided.
- the bearings 24 and 25 can be designed as ball bearings, for example.
- the respective shaft 12 or 20 is supported by the bearing 24 or 25 and is thus supported.
- the bearings 24 or 25 are preferably arranged as close as possible to the end of the shaft 12 or to the end of the shaft 20, respectively, in order to prevent bending of the shaft 12 and the shaft 20.
- the designs shown are mobile leaf vacuums that are suitable for use on private properties, for example.
- the leaf vacuum is pushed and steered by the operator using the handle 5.
- the leaf vacuum can also have a wheel drive, so that it only needs to be steered using the handle 5.
- Leaf vacuums are shown that are suitable for vacuuming up leaves in public spaces, for example in avenues.
- the leaf vacuum is part of a truck. This type of design is suitable for large areas and large quantities of leaves that have previously been collected on the side of the road, for example.
- a trailer that is pulled by the truck serves as the collecting container 4.
- the leaf vacuum has an inlet 1 and an outlet 2.
- the channel-shaped flow guide 3 connecting the inlet 1 and the outlet 2 is designed as a hose. This allows the free end of the channel-shaped flow guide 3 to be adjusted relative to the truck by a rod 22 (not shown in detail) that has at least one adjustment drive and can preferably be operated by the driver when the truck is driving.
- the leaf vacuum, which is driven by a drive (not shown), is mounted on the truck.
- Fan 7 is arranged to generate an air flow to transport the leaves through the flow guide 3 from the inlet 1 to the outlet 2.
- a crushing device 8 is provided.
- the crushing device 8 is arranged directly in the inlet 1 of the flow guide 3, while in the embodiment according to Fig. 12 the shredding device 8 is only arranged in the transition from the outlet 2 into the collecting container 4.
- the shredding device 8 is in the Fig. 11 and 12 only roughly outlined. Also in the Figures 11 and 12 The drive 13 driving the shaft 12 is not shown.
- the shredding device 8 corresponds in its basic structure to the design according to Fig.9 .
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- Crushing And Pulverization Processes (AREA)
Abstract
Die Erfindung betrifft einen Laubsauger mit einem Einlass (1) zum Einsaugen von Laub und einem Auslass (2) zum Ausgeben des Laubes, wobei der Einlass (1) und der Auslass (2) über eine, vorzugsweise kanalförmige, Strömungsführung (3) miteinander verbunden sind, und mit einem von einem Antrieb (6) angetriebenen Lüfter (7) zur Erzeugung eines Luftstroms zum Transport des Laubes durch die Strömungsführung (3) vom Einlass (1) zum Auslass (2). Um einen Laubsauger anzugeben, bei dem die Gefahr von Verstopfungen/Verklebungen durch das angesaugte Laub im Bereich des Auslasses reduziert ist, soll der Laubsauger zusätzlich mit einer Zerkleinerungsvorrichtung (8) versehen sein, die im Verlauf der Strömungsführung (3) vorgesehen ist, wobei vorzugsweise die Zerkleinerungsvorrichtung (8) im Verlauf der Strömungsführung (3) des Laubsaugers zwischen dem Lüfter (7) und dem Auslass (3) angeordnet ist. The invention relates to a leaf vacuum with an inlet (1) for sucking in leaves and an outlet (2) for dispensing the leaves, the inlet (1) and the outlet (2) being connected to one another via a preferably channel-shaped flow guide (3), and with a fan (7) driven by a drive (6) for generating an air flow for transporting the leaves through the flow guide (3) from the inlet (1) to the outlet (2). In order to specify a leaf vacuum in which the risk of blockages/sticking caused by the sucked-in leaves in the area of the outlet is reduced, the leaf vacuum should additionally be provided with a shredding device (8) which is provided in the course of the flow guide (3), the shredding device (8) preferably being arranged in the course of the flow guide (3) of the leaf vacuum between the fan (7) and the outlet (3).
Description
Die Erfindung betrifft einen Laubsauger mit einem Einlass zum Einsaugen von Laub und einem Auslass zum Ausgeben des Laubes, wobei der Einlass und der Auslass über eine, vorzugsweise kanalförmige, Strömungsführung miteinander verbunden sind, und mit einem von einem Antrieb angetriebenen Lüfter zur Erzeugung eines Luftstroms zum Transport des Laubes durch die Strömungsführung vom Einlass zum Auslass.The invention relates to a leaf vacuum with an inlet for sucking in leaves and an outlet for discharging the leaves, wherein the inlet and the outlet are connected to one another via a preferably channel-shaped flow guide, and with a fan driven by a drive for generating an air flow for transporting the leaves through the flow guide from the inlet to the outlet.
Aus der Praxis sind Laubsauger bekannt. Diese saugen das Laub auf und transportieren es in einen Auffangbehälter. Nachteilig hierbei ist, dass - insbesondere, wenn es sich um große Blätter handelt und/oder wenn das Laub sehr feucht ist - es zu Verstopfungen insbesondere im Bereich des Auslasses kommen kann. Dann muss der Betrieb unterbrochen und die Verstopfung entfernt werden. Auch nimmt das im Auffangbehälter gesammelte Laub ein nicht unbeachtliches Volumen ein. Zudem ist das aufgesaugte Laub aufgrund seiner Grö-ße nicht direkt zur Düngung oder zum Mulchen geeignet.Leaf vacuums are well known in practice. These suck up the leaves and transport them into a collecting container. The disadvantage here is that - especially when the leaves are large and/or when the leaves are very wet - blockages can occur, particularly in the area of the outlet. In this case, operation must be stopped and the blockage removed. The leaves collected in the collecting container also take up a considerable volume. In addition, the sucked up leaves are not suitable for fertilizing or mulching due to their size.
Aufgabe der Erfindung ist es, die vorgenannten Nachteile zu vermeiden und einen Laubsauger anzugeben, bei dem die Gefahr von Verstopfungen/Verklebungen durch das angesaugte Laub im Bereich des Auslasses reduziert ist.The object of the invention is to avoid the aforementioned disadvantages and to provide a leaf vacuum in which the risk of blockages/sticking caused by the sucked-in leaves in the area of the outlet is reduced.
Diese Aufgabe wird dadurch gelöst, dass der Laubsauger zusätzlich mit einer Zerkleinerungsvorrichtung versehen ist, die im Verlauf der Strömungsführung vorgesehen ist. Die Zerkleinerungsvorrichtung kann dabei als Zerreißvorrichtung ausgebildet sein, in der das aufgesaugte Material, wie beispielsweise Laub, zerrissen wird.This task is solved by the fact that the leaf vacuum is additionally provided with a shredding device that is provided in the course of the flow guide. The shredding device can be designed as a tearing device in which the sucked-up material, such as leaves, is torn up.
Insoweit hat der erfindungsgemäße Laubsauger neben dem Lüfter, der für das Ansaugen des Laubes und für den Transport des angesaugten Laubes oder auch eventuell anderer angesaugter Gegenstände, wie beispielsweise kleine Äste, innerhalb der Strömungszuführung dient, eine Zerkleinerungsvorrichtung zum Zerreißen des angesaugten Materials, wie beispielsweise des angesaugten Laubes. Durch die Zerkleinerungsvorrichtung wird das angesaugte Material, wie beispielsweise das angesaugte Laub, in kleinere Laubbestandteile zerrissen. Die Zerkleinerungseinrichtung gewährleistet auch ein Zerreißen von Laubblättern größerer Dicke und Größe. Da die von der Zerkleinerungsvorrichtung zerrissenen Bestandteile, wie Laubbestandteile, kleiner als das angesaugte Material, wie Laub, ist, können die zerrissenen Bestandteile, wie beispielsweise die Laubbestandteile, sicher durch den durch den Lüfter erzeugten Luftstrom über den Auslass in den Auffangbehälter transportiert werden. In dem Auffangbehälter kann ferner mehr Material, wie Laub, gesammelt werden, da aufgrund der geringeren Abmessungen der zerrissenen Bestandteile, wie Laubbestandteile, das Material, wie das Laub, dichter gesammelt werden kann. Es wird insoweit eine Volumenreduzierung erreicht, so dass ein Auffangbehälter nicht so schnell entleert werden muss. Durch die Zerkleinerungsvorrichtung wird das angesaugte Laub oder auch eventuell angesaugte andere Gegenstände, wie beispielsweise kleine Äste, auf eine solche Größe zerkleinert, dass das zerkleinerte Endprodukt ohne eine weitere Behandlung zur Düngung und zum Mulchen eingesetzt werden kann.In this respect, the leaf vacuum according to the invention has, in addition to the fan, which serves to suck in the leaves and to transport the sucked-in leaves or possibly other sucked-in objects, such as small branches, within the flow feed, a shredding device for tearing up the sucked-in material, such as the sucked-in leaves. The shredding device tears the sucked-in material, such as the sucked-in leaves, into smaller leaf components. The shredding device also ensures that leaves of greater thickness and size are torn up. Since the components, such as leaf components, torn up by the shredding device are smaller than the sucked-in material, such as leaves, the torn components, such as the leaf components, can be safely transported into the collecting container via the outlet by the air flow generated by the fan. Furthermore, more material, such as leaves, can be collected in the collecting container, since the smaller dimensions of the torn components, such as leaf components, mean that the material, such as leaves, can be collected more densely. This reduces the volume, meaning that a collection container does not have to be emptied so quickly. The shredding device cuts the sucked-in leaves or other objects, such as small branches, to such a size that the shredded end product can be used for fertilization and mulching without further treatment.
Die Zerkleinerungsvorrichtung kann im Verlauf der Strömungsführung des Laubsaugers zwischen dem Lüfter und dem Auslass angeordnet sein. Selbstverständlich ist auch eine umgekehrte Anordnung denkbar, bei der die Zerkleinerungsvorrichtung vor dem Lüfter, d. h. zwischen dem Einlass und dem Lüfter angeordnet ist.The shredding device can be arranged in the flow path of the leaf vacuum between the fan and the outlet. Of course, a reverse arrangement is also conceivable, in which the shredding device is arranged in front of the fan, ie between the inlet and the fan.
Dabei kann die Zerkleinerungsvorrichtung im Inneren der Strömungsführung angeordnet sein, wobei die Strömungsführung zumindest über die Länge der Zerkleinerungsvorrichtung einen, einen kreisförmigen Strömungsquerschnitt aufweisenden Gehäuseabschnitt bildet, und dass die Zerkleinerungsvorrichtung zumindest eine Zerkleinerungseinrichtung aufweist, die wenigstens ein orthogonal oder im Wesentlichen orthogonal zum Gehäuseabschnitt ausgerichtetes Zerkleinerungselement umfasst und dass zumindest ein Zerkleinerungselement wenigstens einer Zerkleinerungseinrichtung drehbar um eine koaxial zum Gehäuseabschnitt ausgerichtete Rotationsachse R in der Strömungsführung gelagert ist. Durch das zumindest eine drehbar um eine koaxial zum Gehäuseabschnitt ausgerichtete Rotationsachse R gelagerte Zerkleinerungselement wird das Laub durch Zerreißen zerkleinert. Zur Erhöhung des Zerkleinerungsergebnisses sind vorzugsweise mehrere Zerkleinerungselemente vorgesehen.The shredding device can be arranged inside the flow guide, the flow guide forming a housing section with a circular flow cross-section at least over the length of the shredding device, and the shredding device having at least one shredding device which comprises at least one shredding element aligned orthogonally or substantially orthogonally to the housing section, and at least one shredding element of at least one shredding device is mounted in the flow guide so as to be rotatable about an axis of rotation R aligned coaxially to the housing section. The leaves are shredded by tearing them up by the at least one shredding element mounted so as to be rotatable about an axis of rotation R aligned coaxially to the housing section. To increase the shredding result, several shredding elements are preferably provided.
Sofern mehrere in Richtung der Rotationsachse gesehen hintereinander angeordnete Zerkleinerungseinrichtungen vorgesehen sind, kann der Abstand zwischen der dem Einlass am nächsten liegenden Zerkleinerungseinrichtung und der dem Auslass am nächsten liegenden Zerkleinerungseinrichtung etwa 50 cm, vorzugsweise zwischen 20 cm und 30 cm, betragen.If several shredding devices are provided which are arranged one behind the other in the direction of the axis of rotation, the distance between the shredding device closest to the inlet and the shredding device closest to the outlet can be approximately 50 cm, preferably between 20 cm and 30 cm.
Sofern mehrere in Richtung der Rotationsachse gesehen hintereinander angeordnete Zerkleinerungseinrichtungen vorgesehen sind, kann der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen identisch sein. Der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen kann vorzugsweise zwischen 10 cm und 20 cm betragen. Es ist aber auch durchaus möglich, dass der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen zum Auslass hin abnimmt.If several shredding devices are provided which are arranged one behind the other in the direction of the axis of rotation, the distance between two adjacent shredding devices can be identical. The distance between two adjacent shredding devices can preferably be between 10 cm and 20 cm. However, it is also entirely possible for the distance between two adjacent shredding devices to decrease towards the outlet.
Bei wenigstens einer Zerkleinerungseinrichtung kann zumindest einem Zerkleinerungselement wenigstens ein weiteres Zerkleinerungselement zugeordnet sein, wobei zumindest eines dieser beiden Zerkleinerungselemente in Relation zu dem anderen Zerkleinerungselement relativ bewegbar ist und wobei die Relativbewegung derart erfolgt, dass in der Position, in der diese beiden Zerkleinerungselemente sich einander am nächsten sind, in Richtung der Rotationsachse R gesehen zwischen diesen beiden Zerkleinerungselementen ein Spalt S verbleibt, so dass das Laub durch die relative Verlagerung in dem betreffenden Spalt S zerreißbar ist. Für die Relativbewegung kann eines der beiden Zerkleinerungselemente ortsfest angeordnet sein, während das andere der beiden Zerkleinerungselemente drehbar gelagert ist. Selbstverständlich ist es auch möglich, dass beide Zerkleinerungselemente in dieselbe Richtung, jedoch mit einer unterschiedlichen Geschwindigkeit gedreht werden. Auch ist es möglich, dass sich beide Zerkleinerungselemente in unterschiedliche Richtungen drehen. Jedes weitere Zerkleinerungselement ist ebenfalls orthogonal oder im Wesentlichen orthogonal zum Gehäuseabschnitt ausgerichtet. Durch das Zusammenwirken zweier korrespondierender Zerkleinerungselemente kann der Zerreißprozess verbessert werden, da das Laub in dem jeweiligen Spalt durch die Relativbewegung der beiden korrespondierenden Zerkleinerungselemente zerrissen wird.In the case of at least one comminution device, at least one further comminution element can be assigned to at least one comminution element, wherein at least one of these two comminution elements is relatively movable in relation to the other comminution element and wherein the relative movement takes place in such a way that in the position in which these two comminution elements are closest to each other, a gap S remains between these two shredding elements as seen in the direction of the rotation axis R, so that the leaves can be torn by the relative displacement in the gap S in question. For the relative movement, one of the two shredding elements can be arranged in a fixed position, while the other of the two shredding elements is rotatably mounted. Of course, it is also possible for both shredding elements to be rotated in the same direction, but at different speeds. It is also possible for both shredding elements to rotate in different directions. Each additional shredding element is also aligned orthogonally or essentially orthogonally to the housing section. The tearing process can be improved by the interaction of two corresponding shredding elements, since the leaves in the respective gap are torn by the relative movement of the two corresponding shredding elements.
In dem Gehäuseabschnitt kann eine koaxial zum Gehäuseabschnitt ausgerichtete Achse angeordnet sein und an der Achse kann zumindest ein radial vorstehendes Zerkleinerungselement wenigstens einer Zerkleinerungseinrichtung befestigt sein.An axis aligned coaxially to the housing section can be arranged in the housing section and at least one radially projecting comminution element of at least one comminution device can be attached to the axis.
Die Achse kann mittels eines Antriebs antreibbar sein.The axle can be driven by a drive.
Der Gehäuseabschnitt kann unbeweglich am Laubsauger befestigt sein.The housing section can be fixedly attached to the leaf vacuum.
An der Innenseite des Gehäuseabschnittes kann zumindest ein radial ausgerichtetes Zerkleinerungselement wenigstens einer Zerkleinerungseinrichtung angeordnet sein. Sofern mehrere Zerkleinerungselemente vorgesehen sind, können die mehreren Zerkleinerungselemente in einer Ebene, die orthogonal zur Rotationsachse ausgerichtet ist, angeordnet sein. Alternativ oder in Ergänzung können auch mehrere Zerkleinerungselemente in Richtung der Rotationsachse gesehen hintereinander angeordnet sein.At least one radially aligned shredding element of at least one shredding device can be arranged on the inside of the housing section. If several shredding elements are provided, the several shredding elements can be arranged in a plane that is aligned orthogonally to the axis of rotation. Alternatively or in addition, several shredding elements can also be arranged one behind the other in the direction of the axis of rotation.
An der Innenseite des Gehäuseabschnittes zu zumindest einer Zerkleinerungseinrichtung können zumindest zwei Zerkleinerungselemente angeordnet sein, wobei die zwei Zerkleinerungselemente in Richtung der Rotationsachse R gesehen in einem solchen Abstand A zueinander angeordnet sind, dass das korrespondierende, auf der Achse angeordnete Zerkleinerungselement berührungsfrei zwischen den beiden, an der Innenseite des Gehäuseabschnittes angeordneten Zerkleinerungselementen unter Bildung jeweils eines Spaltes S rotierbar ist.At least two comminution elements can be arranged on the inside of the housing section for at least one comminution device, wherein the two comminution elements are arranged at a distance A from one another as seen in the direction of the rotation axis R such that the corresponding comminution element arranged on the axis can be rotated without contact between the two comminution elements arranged on the inside of the housing section, forming a gap S in each case.
An der Innenseite des Gehäuseabschnittes zu zumindest einer Zerkleinerungseinrichtung können zumindest zwei Zerkleinerungselemente angeordnet sein, wobei das eine der beiden Zerkleinerungselemente zu einer größeren Anzahl an Zerkleinerungselementen gehört, die in einer orthogonal zur Rotationsachse ausgerichteten Ebene angeordnet sind, und das andere der beiden Zerkleinerungselemente zu einer größeren Anzahl an anderen Zerkleinerungselementen gehört, die in einer anderen orthogonal zur Rotationsachse ausgerichteten Ebene angeordnet sind, wobei die beiden durch die jeweils gebildeten Zerkleinerungselemente gebildeten Ebenen in Richtung der Rotationsachse R gesehen in einem solchen Abstand A zueinander angeordnet sind, dass das korrespondierende, auf der Achse angeordnete Zerkleinerungselement berührungsfrei zwischen den beiden, an der Innenseite des Gehäuseabschnittes angeordneten Zerkleinerungselementen unter Bildung jeweils eines Spaltes S rotierbar ist. Dabei kann das auf der Achse angeordnete Zerkleinerungselement wiederum zu einer größeren Anzahl an Zerkleinerungselementen gehören, die in einer orthogonal zur Rotationsachse R ausgerichteten Ebene angeordnet sind. Bei einer Ausgestaltung des Laubsaugers, die einen unbeweglich am Laubsauger befestigten Gehäuseabschnitt sowie eine rotierende Achse aufweist, ist sowohl die größere Anzahl an Zerkleinerungselementen, die in der einen orthogonal zur Rotationsachse R ausgerichteten Ebene angeordnet sind, als auch die größere Anzahl an Zerkleinerungselementen, die in der anderen orthogonal zur Rotationsachse R ausgerichteten Ebene angeordnet sind, nicht drehbar, d. h. ortsfest, während das(die) auf der Achse angeordnete(n) Zerkleinerungselement(e) um die Rotationsachse R rotiert(rotieren).At least two comminution elements can be arranged on the inside of the housing section for at least one comminution device, wherein one of the two comminution elements belongs to a larger number of comminution elements that are arranged in a plane aligned orthogonally to the axis of rotation, and the other of the two comminution elements belongs to a larger number of other comminution elements that are arranged in another plane aligned orthogonally to the axis of rotation, wherein the two planes formed by the respective comminution elements are arranged at a distance A from one another in the direction of the axis of rotation R such that the corresponding comminution element arranged on the axis can be rotated without contact between the two comminution elements arranged on the inside of the housing section, forming a gap S in each case. The comminution element arranged on the axis can in turn belong to a larger number of comminution elements that are arranged in a plane aligned orthogonally to the axis of rotation R. In an embodiment of the leaf vacuum which has a housing section fixedly attached to the leaf vacuum and a rotating axis, both the larger number of shredding elements arranged in one plane aligned orthogonally to the rotation axis R and the larger number of shredding elements arranged in the other plane aligned orthogonally to the rotation axis R are not rotatable, i.e. stationary, while the shredding element(s) arranged on the axis rotate(s) about the rotation axis R.
Die Breite des Spaltes S kann zwischen 0,5 mm und 7 mm, vorzugsweise zwischen 1 mm und 4 mm, besonders bevorzugt 2 mm, betragen.The width of the gap S can be between 0.5 mm and 7 mm, preferably between 1 mm and 4 mm, particularly preferably 2 mm.
Dabei kann die Breite des Spaltes S zwischen zwei Zerkleinerungselementen zum Auslass hin kontinuierlich oder diskontinuierlich abnehmen. Bei einer solchen Ausgestaltung ist die Breite des Spaltes S zwischen zwei beim Reißen zusammenwirkenden Zerkleinerungselementen, die näher am Einlass angeordnet sind, größer als die Breite des Spaltes S zwischen zwei beim Reißen zusammenwirkenden Zerkleinerungselementen, die näher am Auslass angeordnet sind. Bei einer solchen Ausgestaltung erfolgt in den zwischen zwei dem Einlass näher angeordneten Zerkleinerungselementen eine Grobzerkleinerung, während anschließend in dem Spalt S zwischen zwei dem Auslass näher angeordneten Zerkleinerungselementen eine Feinzerkleinerung erfolgt.The width of the gap S between two comminution elements can decrease continuously or discontinuously towards the outlet. In such a design, the width of the gap S between two comminution elements that cooperate in tearing and are arranged closer to the inlet is greater than the width of the gap S between two comminution elements that cooperate in tearing and are arranged closer to the outlet. In such a design, coarse comminution takes place in the two comminution elements arranged closer to the inlet, while fine comminution then takes place in the gap S between two comminution elements arranged closer to the outlet.
Bei einer bevorzugten Ausführungsform kann sich die Breite des Spaltes S von der dem Einlass zugewandten Zerkleinerungseinrichtung zu der dem Auslass zugewandten Zerkleinerungseinrichtung verringern.In a preferred embodiment, the width of the gap S can decrease from the comminution device facing the inlet to the comminution device facing the outlet.
Zumindest eine Zerkleinerungseinrichtung kann wenigstens zwei, vorzugsweise drei, in einer Ebene angeordnete Zerkleinerungselemente umfassen, wobei die Zerkleinerungselemente um zumindest 30°, vorzugsweise um 120°, versetzt zueinander angeordnet sind. Durch eine vergrößerte Anzahl an Zerkleinerungselementen innerhalb einer Ebene, die orthogonal zur Rotationsachse ausgerichtet ist, wird die Anzahl an Kanten erhöht, die zur Zerkleinerung des Laubes zur Verfügung stehen.At least one shredding device can comprise at least two, preferably three, shredding elements arranged in a plane, wherein the shredding elements are arranged offset from one another by at least 30°, preferably by 120°. By increasing the number of shredding elements within a plane that is aligned orthogonally to the axis of rotation, the number of edges available for shredding the leaves is increased.
Die dem Gehäuseabschnitt abgewandten Enden der in einer Ebene angeordneten Zerkleinerungselemente zumindest einer Zerkleinerungseinrichtung können an einem Ring, vorzugsweise an einem als Montagering ausgebildeten Ring, befestigt sein. Sofern der Ring als Montagering ausgebildet ist, können die entsprechenden Zerkleinerungselemente drehfest an der Achse befestigt werden. Soll der Ring lediglich ein Lager darstellen, in dem die Achse drehbar gelagert ist, weist der Ring eine so große Öffnung auf, dass die Achse hierin frei drehbar ist.The ends of the crushing elements of at least one crushing device, which are arranged in one plane and which face away from the housing section, can be attached to a ring, preferably to a ring designed as a mounting ring. If the ring is designed as a mounting ring, the corresponding crushing elements can be attached to the axle in a rotationally fixed manner. If the ring is only intended to be a bearing in which the axle is rotatably mounted, the ring has an opening large enough for the axle to be freely rotatable therein.
Die dem Gehäuseabschnitt zugewandten Enden der in einer Ebene angeordneten Zerkleinerungselemente zumindest einer Zerkleinerungseinrichtung können außenseitig von einem Außenring umfasst sein. Mittels des Außenrings können beispielsweise die Zerkleinerungselemente an dem Gehäuseabschnitt befestigt sein. Sofern zusätzlich ein Ring, wie beispielsweise ein als Montagering ausgebildeter Ring, vorgesehen ist, ist der Außenring ebenfalls koaxial und in einer Ebene mit dem Ring angeordnet.The ends of the crushing elements of at least one crushing device arranged in one plane facing the housing section can be surrounded on the outside by an outer ring. The crushing elements can be attached to the housing section by means of the outer ring, for example. If a ring, such as a ring designed as a mounting ring, is also provided, the outer ring is also arranged coaxially and in one plane with the ring.
Dabei können die Zerkleinerungselemente zweier benachbarter Zerkleinerungseinrichtungen versetzt zueinander, vorzugsweise um zumindest 30° zueinander versetzt, angeordnet sein. Durch die versetzte Anordnung ist sichergestellt, dass beispielsweise das Laub beim Passieren des Gehäuseabschnittes durch zumindest eine der vier Zerkleinerungseinrichtungen zerkleinert wird. Selbstverständlich können die Zerkleinerungselemente zweier benachbarter Zerkleinerungseinrichtungen oder auch aller Zerkleinerungseinrichtungen miteinander fluchten.The shredding elements of two adjacent shredding devices can be arranged offset from one another, preferably offset by at least 30°. The offset arrangement ensures that, for example, the leaves are shredded by at least one of the four shredding devices when they pass through the housing section. Of course, the shredding elements of two adjacent shredding devices or even all shredding devices can be aligned with one another.
Zumindest eine Kante der beim Zerreißen des Laubes zusammenwirkenden Kanten der Zerkleinerungselemente wenigstens einer Zerkleinerungseinrichtung kann eine sägezahnartige Riffelung aufweisen. Sofern beide Kanten der beim Zerreißen des Laubes zusammenwirkenden Kanten der Zerkleinerungselemente wenigstens einer Zerkleinerungseinrichtung eine sägezahnartige Riffelung aufweisen, weist bei dem einen Zerkleinerungselement die in Drehrichtung D weisende Kante die Riffelung auf, während bei dem korrespondierenden Zerkleinerungselement dieser Zerkleinerungseinrichtung die entgegen der Drehrichtung D weisende Kante die Riffelung aufweist.At least one edge of the edges of the shredding elements of at least one shredding device that interact when tearing up the leaves can have a sawtooth-like corrugation. If both edges of the edges of the shredding elements of at least one shredding device that interact when tearing up the leaves have a sawtooth-like corrugation, the edge pointing in the direction of rotation D of one shredding element has the corrugation, while the edge pointing opposite to the direction of rotation D of the corresponding shredding element of this shredding device has the corrugation.
Dabei kann bei wenigstens einer Zerkleinerungseinrichtung zumindest einer der beiden aufeinander zuweisenden Bereiche der beim Zerreißen des Laubes zusammenwirkenden Zerkleinerungselemente dieser Zerkleinerungseinrichtung eine sägezahnartige Riffelung aufweisen. Vorzugsweise können bei wenigstens einer Zerkleinerungseinrichtung beide der aufeinander zuweisenden Bereiche der beim Zerreißen des Laubes zusammenwirkenden Zerkleinerungselemente dieser Zerkleinerungseinrichtung eine sägezahnartige Riffelung aufweisen. Dabei ist die Riffelung vorzugsweise orthogonal zu der Bewegungsrichtung des betreffenden Bereichs beim Zerreißprozeß ausgerichtet. Bei einem Bereich handelt es sich beispielsweise um eine Seitenfläche oder Seitenflanke eines Zerkleinerungselementes.In the case of at least one shredding device, at least one of the two areas facing each other of the shredding elements of this shredding device that cooperate when tearing up the leaves can have a sawtooth-like ribbing. Preferably, in the case of at least one shredding device, both of the areas facing each other of the shredding elements of this shredding device that cooperate when tearing up the leaves can have a sawtooth-like ribbing The corrugation is preferably aligned orthogonally to the direction of movement of the relevant area during the tearing process. An area is, for example, a side surface or side flank of a shredding element.
An dem, dem Einlass zugewandten Ende der Achse kann ein Schaufelrad zur Vereinzelung des Laubes angeordnet sein. Durch eine Vereinzelung des Laubes wird das Zerkleinerungsergebnis verbessert.A paddle wheel for separating the leaves can be arranged at the end of the axle facing the inlet. Separating the leaves improves the shredding result.
Dabei kann der den Lüfter antreibende Antrieb und der die Achse antreibende Antrieb derselbe Antrieb sein. Die Achse kann mit einer Drehzahl zwischen 1000 1/min bis 5000 1 /min, bevorzugt mit einer Drehzahl von 3000 1/min, rotieren.The drive that drives the fan and the drive that drives the axle can be the same drive. The axle can rotate at a speed of between 1000 rpm and 5000 rpm, preferably at a speed of 3000 rpm.
Dabei kann zwischen dem Antrieb und der Achse ein Getriebe mit einem Übersetzungsverhältnis zwischen 1:2 und 1:10, vorzugsweise von 1:3, angeordnet sein.A gearbox with a gear ratio between 1:2 and 1:10, preferably 1:3, can be arranged between the drive and the axle.
Dabei kann am Auslass ein Auffangbehälter zur Aufnahme des ausgegebenen Laubes vorgesehen sein. Auf diese Weise kann das zerkleinerte Laub in dem Auffangbehälter gesammelt werden.A collecting container can be provided at the outlet to collect the leaves that are discharged. In this way, the shredded leaves can be collected in the collecting container.
Für ein einfaches Verfahren kann der Laubsauger zumindest zwei Räder, vorzugsweise vier Räder, aufweisen. Bei einer solchen Ausgestaltung ist der Laubsauger fahrbar und eignet sich beispielsweise für den Einsatz auf privaten Grundstücken. In der einfachsten Ausführungsform wird der Laubsauger von dem Bediener geschoben. Der Laubsauger kann auch über einen Radantrieb verfügen. In diesem Fall wird der Laubsauger von dem Bediener über einen Griff nur noch gelenkt.For a simpler method, the leaf vacuum can have at least two wheels, preferably four wheels. With such a design, the leaf vacuum is mobile and is suitable for use on private property, for example. In the simplest embodiment, the leaf vacuum is pushed by the operator. The leaf vacuum can also have a wheel drive. In this case, the leaf vacuum is only steered by the operator using a handle.
Der Laubsauger kann auch als Aufsitzlaubsauger ausgebildet sein. Bei einer solchen Ausgestaltung weist der Laubsauger beispielsweise ein Lenkrad, Pedale, sowie einen Fahrersitz, auf. Eine solche Ausgestaltung eignet sich beispielsweise für größere Grundstücke.The leaf vacuum can also be designed as a ride-on leaf vacuum. In such a design, the leaf vacuum has a steering wheel, pedals and a driver's seat. Such a design is suitable for larger properties, for example.
Der Laubsauger kann auch als Laubsaugrobotor, d. h. als vollautomatischer Laubsauger, ausgebildet sein. Ein Laubsaugrobotor verfügt unter anderem über einen eigenen Antrieb, über einen Energiespeicher, wie beispielsweise eine Batterie, und über eine geeignete Steuerungseinrichtung. Nach Einschalten arbeitet der Laubsaugrobotor frei und eigenständig, ohne dass ein Bediener eingreifen muss. Die Handlungen werden von der Steuerungseinrichtung gesteuert. Eine in der Steuerungseinrichtung hinterlegte Software entscheidet beispielweise über den Fahrweg des Laubsaugrobotors oder über die Aufladezeiten.The leaf vacuum can also be designed as a leaf vacuum robot, i.e. as a fully automatic leaf vacuum. A leaf vacuum robot has, among other things, its own drive, an energy storage device, such as a battery, and a suitable control device. After switching on, the leaf vacuum robot works freely and independently, without the need for an operator to intervene. The actions are controlled by the control device. Software stored in the control device decides, for example, on the path of the leaf vacuum robot or on the charging times.
Zum Aufsaugen von Laub im öffentlichen Raum, beispielsweise in Alleen, bietet es sich an, wenn der Laubsauger Bestandteil eines Autos, eines Lastkraftwagens oder eines Anhängers eines Lastkraftwagens ist. Auf diese Weise können große Mengen an Laub, die zuvor beispielsweise am Straßenrand gesammelt worden sind, aufgesaugt werden. Bei einer solchen Ausgestaltung ist die Zerkleinerungsvorrichtung, die beispielsweise als Zerreißvorrichtung ausgebildet ist, an die größeren zu zerkleinernden Laubmengen angepasst. Dies gilt beispielsweise in Bezug auf die Abmessungen, wie Länge oder Durchmesser des Gehäuseabschnittes, der Drehzahl, der Anzahl an Zerkleinerungseinrichtungen oder der Anzahl an Zerkleinerungselementen pro Zerkleinerungseinrichtung. Sofern mehrere in Richtung der Rotationsachse gesehen hintereinander angeordnete Zerkleinerungseinrichtungen vorgesehen sind, kann der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen identisch sein. Der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen kann vorzugsweise zwischen 10 cm und 50 cm betragen. Es ist aber auch durchaus möglich, dass der Abstand zwischen zwei benachbarten Zerkleinerungseinrichtungen zum Auslass hin abnimmt. Die Breite des Spaltes S kann zwischen 0,5 mm und 7 mm, vorzugsweise zwischen 1 mm und 4 mm, besonders bevorzugt 2 mm, betragen.For vacuuming up leaves in public spaces, for example in avenues, it is advisable if the leaf vacuum is part of a car, a truck or a trailer of a truck. In this way, large quantities of leaves that have previously been collected, for example, on the side of the road can be vacuumed up. With such a design, the shredding device, which is designed as a tearing device, for example, is adapted to the larger quantities of leaves to be shredded. This applies, for example, to the dimensions, such as the length or diameter of the housing section, the speed, the number of shredding devices or the number of shredding elements per shredding device. If several shredding devices are provided, arranged one behind the other in the direction of the axis of rotation, the distance between two adjacent shredding devices can be identical. The distance between two adjacent shredding devices can preferably be between 10 cm and 50 cm. However, it is also entirely possible for the distance between two adjacent shredding devices to decrease towards the outlet. The width of the gap S can be between 0.5 mm and 7 mm, preferably between 1 mm and 4 mm, particularly preferably 2 mm.
Ferner bietet es sich an, wenn im Bereich des Einlasses eine mit einer Steuerungseinrichtung verbundene Detektionseinrichtung, wie beispielsweise eine optische Detektionseinrichtung, vorgesehen ist. Wird mittels der Detektionseinrichtung beispielsweise eine Laterne detektiert, wird der Einlass mittels der Steuerungseinrichtung berührungslos um die Laterne herumgeführt.It is also advisable to provide a detection device connected to a control device, such as an optical detection device, in the area of the inlet. If the detection device For example, if a lantern is detected, the inlet is guided around the lantern without contact using the control device.
Im Folgenden werden in den Zeichnungen dargestellte Ausführungsbeispiele der Erfindung erläutert. Es zeigen:
- Fig. 1
- ein Ausführungsbeispiel eines erfindungsgemäßen Laubsaugers,
- Fig. 2
- einen Schnitt durch ein erstes Ausführungsbeispiel einer kanalförmigen Strömungsführung einschließlich eines Antriebs,
- Fig. 3
- eine schräge Ansicht auf den Gegenstand nach
Fig. 2 , - Fig. 4
- das Detail "X" aus
Fig. 3 mit geschnittener Strömungsführung, - Fig. 5
- eine Seitenansicht auf eine der vier Zerkleinerungseinrichtungen aus
Fig. 4 , - Fig. 6
- eine Explosionsdarstellung des Gegenstandes nach
Fig. 5 , - Fig. 7
- eine Ansicht von links in Richtung der Achse gesehen in das Innere des Gegenstandes nach
Fig. 3 , - Fig. 8
- eine schräge Seitenansicht auf ein zweites Ausführungsbeispiel des Gehäuseabschnittes einer kanalförmigen Strömungsführung einschließlich eines Antriebs,
- Fig. 9
- den Gegenstand nach
Fig. 8 ohne einen die Zerkleinerungsvorrichtung umgebenden Gehäuseabschnitt, - Fig. 10
- eine alternative Ausgestaltung des erfindungsgemäßen Laubsaugers,
- Fig. 11
- eine Ausgestaltung, bei der der erfindungsgemäße Laubsauger Bestandteil eines Lastkraftwagens ist,
- Fig. 12
- eine Ausgestaltung, bei der der erfindungsgemäße Laubsauger wiederum Bestandteil eines Lastkraftwagens ist und
- Fig. 13
- eine Explosionsdarstellung eines anderen Ausführungsbeispiels einer Zerkleinerungseinrichtung.
- Fig.1
- an embodiment of a leaf vacuum according to the invention,
- Fig.2
- a section through a first embodiment of a channel-shaped flow guide including a drive,
- Fig.3
- an oblique view of the object after
Fig. 2 , - Fig.4
- the detail "X" from
Fig.3 with cut flow guidance, - Fig.5
- a side view of one of the four shredding devices
Fig.4 , - Fig.6
- an exploded view of the object according to
Fig.5 , - Fig.7
- a view from the left in the direction of the axis into the interior of the object
Fig.3 , - Fig.8
- an oblique side view of a second embodiment of the housing section of a channel-shaped flow guide including a drive,
- Fig.9
- the object after
Fig.8 without a housing section surrounding the shredding device, - Fig.10
- an alternative embodiment of the leaf vacuum according to the invention,
- Fig. 11
- an embodiment in which the leaf vacuum according to the invention is part of a truck,
- Fig. 12
- an embodiment in which the leaf vacuum according to the invention is again part of a truck and
- Fig. 13
- an exploded view of another embodiment of a comminution device.
In allen Figuren werden für gleiche bzw. gleichartige Bauteile übereinstimmende Bezugszeichen verwendet.In all figures, identical reference symbols are used for identical or similar components.
Ferner umfasst der Laubsauger einen von einem Antrieb 6 angetriebenen Lüfter 7 zur Erzeugung eines Luftstroms zum Transport des Laubes durch die Strömungsführung 3 vom Einlass 1 zum Auslass 2. Der Lüfter 7 ist in dem dargestellten Ausführungsbeispiel als Radiallüfter ausgebildet.Furthermore, the leaf vacuum comprises a
Darüber hinaus ist der Laubsauger zusätzlich mit einer Zerkleinerungsvorrichtung 8 versehen, die im Verlauf der Strömungsführung 3 vorgesehen ist. Die Zerkleinerungsvorrichtung 8 ist dabei im Verlauf der Strömungsführung 3 des Laubsaugers zwischen dem Lüfter 7 und dem Auslass 2 angeordnet. Die Zerkleinerungsvorrichtung 8 ist im Inneren der Strömungsführung 3 angeordnet. In dem dargestellten Ausführungsbeispiel bildet die Strömungsführung 3 zumindest über die Länge der Zerkleinerungsvorrichtung 8 einen, einen kreisförmigen Strömungsquerschnitt aufweisenden Gehäuseabschnitt 9. Der Gehäuseabschnitt 9 ist unbeweglich am Laubsauger befestigt.In addition, the leaf vacuum is additionally provided with a
Die Zerkleinerungsvorrichtung 8 selbst weist - wie beispielsweise
In dem Gehäuseabschnitt 9 ist eine koaxial zum Gehäuseabschnitt 9 ausgerichtete Achse 12, die die Rotationsachse R bildet, angeordnet. Die Achse 12 ist mittels eines Antriebs 13 antreibbar. Bei dem Ausführungsbeispiel nach
Es bietet sich an, wenn der Laubsauger zusätzlich eine nicht dargestellte außenseitige Einhausung aufweist, die sich beispielsweise von dem Übergang vom Lüfter 7 zum Antrieb 6 einerseits bis zumindest rechts von dem Keilriemen 14 andererseits erstreckt und zumindest die beiden Seiten sowie die Oberseite des Laubsaugers umschließt. Eine solche Einhausung würde damit u. a. den Antrieb 6 und den Keilriemen 14 einhausen. Auf diese Weise wird zum einen die Geräuschemission reduziert. Zum anderen dient die Einhausung als Schutz vor dem rotierenden Keilriemen 14.It is advisable for the leaf vacuum to also have an external housing (not shown) which extends, for example, from the transition from the
Die Ausgestaltung, bei der der Antrieb 6 über den Keilriemen 14 mit der Achse 12 verbunden ist und auf diese Weise die Achse 12 antreibt, ist auch in vergrößerter Darstellung beispielsweise in den
Das in
Für eine effektive Zerkleinerung durch Zerreißen kann die Achse 12 mit einer Drehzahl zwischen 1000 1/min bis 5000 1/min, bevorzugt mit einer Drehzahl von 3000 1/min, rotieren. Durch die Auswahl geeigneter Durchmesser der den Keilriemen 14 führenden Scheiben 15 bzw. Scheiben 15, 21 in
Bei jeder der vier Zerkleinerungseinrichtungen 10 ist einem Zerkleinerungselement 11 wenigstens ein weiteres Zerkleinerungselement 11 zugeordnet, wobei eines dieser beiden Zerkleinerungselemente 11 in Relation zu dem anderen Zerkleinerungselement 11 relativ bewegbar ist. Die Relativbewegung erfolgt derart, dass in der Position, in der diese beiden Zerkleinerungselemente 11 sich einander am nächsten sind, in Richtung der Rotationsachse R gesehen zwischen diesen beiden Zerkleinerungselementen 11 ein Spalt S verbleibt, so dass das Laub durch die relative Verlagerung in dem betreffenden Spalt S zerrissen wird.In each of the four crushing
Wie beispielsweise
Beispielsweise in
Über den Lüfter 7 wird das Laub angesaugt und gelangt über die Strömungsführung 3 in die Zerkleinerungsvorrichtung 8. Hier trifft das Laub auf die sich drehende Achse 12 mit den daran befestigten Zerkleinerungselementen 11. Durch die Rotation der Achse 12 und damit durch die Rotation der Zerkleinerungselemente 11 auf der einen Seite und den feststehenden, am Gehäuseabschnitt 9 befestigten Zerkleinerungselementen 11 andererseits besteht eine Relativbewegung. Das Laub wird durch die sich relativ zueinander verlagernden Zerkleinerungselemente 11 jeder der vier Zerkleinerungseinrichtungen 10 zerrissen und auf diese Weise zerkleinert.The leaves are sucked in via the
Die Relativbewegung erfolgt derart, dass in der Position, in der zwei miteinander wirkende Zerkleinerungselemente 11 sich einander am nächsten sind, in Richtung der Rotationsachse R gesehen zwischen diesen beiden Zerkleinerungselementen 11 ein Spalt S verbleibt. Hierzu wird beispielsweise auf
Bei den dargestellten Ausführungsbeispielen sind insgesamt vier Zerkleinerungseinrichtungen 10 vorgesehen. Da das Laub auf dem Weg vom Einlass 1 zum Auslass 2 sämtliche vier Zerkleinerungseinrichtungen 10 passiert, wird das Laub bzw. das bereits zerkleinerte Laub insgesamt viermal durch Zerrei-ßen zerkleinert bzw. weiterzerkleinert. Die Anzahl an Zerkleinerungseinrichtungen 10 hängt von der Größe des angesaugten Laubes und dem gewünschten Zerkleinerungsgrad ab und ist entsprechend auszuwählen. Selbstverständlich kann auch die Anzahl an Zerkleinerungselementen, die in einer Ebene angeordnet sind, anders gewählt werden.In the embodiments shown, a total of four
Die Zerkleinerungselemente 11 benachbarter Zerkleinerungseinrichtungen 10 können in Richtung der Rotationsachse R gesehen fluchten. Dann weisen die Zerkleinerungselemente 11 dieser Zerkleinerungseinrichtungen 10 die gleiche Ausrichtung gegenüber der Achse 12 auf. Eine alternative Ausgestaltung ist in
Wie beispielsweise
Die in
Bei dem Ausführungsbeispiel nach
Für eine hinreichende Lagerung sowohl der Welle 12 als auch der Welle 20 ist ein Haltelement 23 vorgesehen, das in dem dargestellten Ausführungsbeispiel an der rückseitigen Außenseite des Auffangbehälters 4 montiert ist. Das Haltelement 23 weist ein Lager 24, durch das die Welle 12 geführt ist, und ein Lager 25, durch dass die Welle 20 geführt ist, auf. Die Lager 24 und 25 können beispielsweise als Kugellager ausgebildet sein. Durch das Lager 24 bzw. 25 ist die jeweilige Welle 12 bzw. 20 gelagert und wird damit gestützt. Die Lager 24 bzw. 25 sind bevorzugt möglichst nahe an dem Ende der Welle 12 bzw. an dem Ende der Welle 20 angeordnet, um ein Verbiegen der Welle 12 und der Welle 20 zu verhindern.For adequate support of both the
Bei den beispielsweise in den
In den
In den
Ferner ist eine Zerkleinerungsvorrichtung 8 vorgesehen. Bei dem Ausführungsbeispiel nach
Claims (16)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE202022106717.1U DE202022106717U1 (en) | 2022-11-30 | 2022-11-30 | Leaf vacuum with an inlet for sucking in leaves and an outlet for dispensing the leaves |
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EP23213313.2A Pending EP4379142A1 (en) | 2022-11-30 | 2023-11-30 | Vacuum cleaner with an inlet for sucking up leaves and an outlet for discharging leaves |
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Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005701A1 (en) * | 1980-02-15 | 1981-08-20 | Rudolf 2000 Hamburg Schulze | Centrifugal suction blower for picking up leaves - has upstream rotary cutters to chop leaves before replacing on ground or in container |
US5317783A (en) * | 1992-09-25 | 1994-06-07 | Haybuster Manufacturing Inc. | Vacuum trailer |
CN111576294A (en) * | 2020-06-11 | 2020-08-25 | 嘉兴卉景园林有限公司 | Sweeper suitable for fallen leaves are cleaned, crushed, compressed and recovered |
CN114197364A (en) * | 2021-12-22 | 2022-03-18 | 浙江佳立美创环境服务有限公司 | A waste branch and leaf collection device for garden environment cleaning |
CN114557188A (en) * | 2022-03-01 | 2022-05-31 | 张家港江苏科技大学产业技术研究院 | Automatic it smashes all-in-one to change clear leaf weeding |
CN114558876A (en) * | 2022-02-18 | 2022-05-31 | 汪松 | Small-size fallen leaf exempts from to collect formula and smashes nourishment processingequipment |
-
2022
- 2022-11-30 DE DE202022106717.1U patent/DE202022106717U1/en active Active
-
2023
- 2023-11-30 EP EP23213313.2A patent/EP4379142A1/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3005701A1 (en) * | 1980-02-15 | 1981-08-20 | Rudolf 2000 Hamburg Schulze | Centrifugal suction blower for picking up leaves - has upstream rotary cutters to chop leaves before replacing on ground or in container |
US5317783A (en) * | 1992-09-25 | 1994-06-07 | Haybuster Manufacturing Inc. | Vacuum trailer |
CN111576294A (en) * | 2020-06-11 | 2020-08-25 | 嘉兴卉景园林有限公司 | Sweeper suitable for fallen leaves are cleaned, crushed, compressed and recovered |
CN114197364A (en) * | 2021-12-22 | 2022-03-18 | 浙江佳立美创环境服务有限公司 | A waste branch and leaf collection device for garden environment cleaning |
CN114558876A (en) * | 2022-02-18 | 2022-05-31 | 汪松 | Small-size fallen leaf exempts from to collect formula and smashes nourishment processingequipment |
CN114557188A (en) * | 2022-03-01 | 2022-05-31 | 张家港江苏科技大学产业技术研究院 | Automatic it smashes all-in-one to change clear leaf weeding |
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