CN217601549U - Electric tool - Google Patents

Abstract

The utility model discloses an electric tool. The electric tool includes: a rod assembly having a first end and a second end opposite the first end; a handle assembly coupled to the first end; and a head assembly coupled to the second end, the head assembly including a drive member and a working member, the working member being removably coupled to the drive member to perform the trench cleaning, wherein the drive member is capable of driving the working member to rotate in a first direction. According to the utility model discloses an electric tool can realize the convenient coupling of dismantling between operation part and the driver part.

Description

electrical tools

technical field

The utility model relates to a power tool such as a trench cleaning device.

Background technique

Power tools such as trench cleaners are widely used. Such power tools often require a drive member (eg, a motor) to drive the work member to work. Typically, the working member will be fixedly coupled directly to the drive member so as to work when driven. There are also some that removably connect the working part to the drive part. However, these connections are complicated in structure, troublesome in disassembly and assembly, and require special tools to operate. Also, the connection isn't ideal. Moreover, the working part can only be driven in a specific direction, which is not convenient in some specific occasions, and even makes the work operation impossible.

Utility model content

In view of one or more technical shortcomings of the prior art, the present invention provides a power tool, preferably a trench cleaning device.

According to some embodiments of the present invention, there is provided a power tool, preferably a trench cleaning device, wherein the power tool comprises: a rod-shaped assembly having a first end and a second opposite to the first end a handle assembly coupled with the first end; and a handpiece assembly coupled with the second end, the handpiece assembly including a drive member and a work member removably coupled to the drive member to perform trench cleaning, wherein the drive The member is capable of driving the working member to rotate in a first direction.

Alternatively or additionally, the drive member includes a first interface assembly, the first interface assembly includes at least one first drive surface, the working member includes a second interface assembly, and the second interface assembly includes an opposing at least one first driven surface, At least one first driving surface acts on at least one first driven surface, so that the working member rotates in the first direction; preferably at least one first driving surface includes three first driving surfaces, and at least one first driven surface includes three The first driven surface.

Alternatively or additionally, the first interface assembly includes at least one first radial stop surface and the second interface assembly includes at least one opposite second radial stop surface, the at least one first radial stop surface acting on At least one second radial stop surface, thereby restricting the rotation of the working member in a second direction opposite to the first direction; preferably at least one first radial stop surface includes three first radial stop surfaces, at least one first radial stop surface The two radial stop surfaces include three second radial stop surfaces.

Alternatively or additionally, the first interface assembly includes a first axial stop surface, the second interface assembly includes a second axial stop surface, the first axial stop surface acts on the second axial stop surface, To limit the axial movement of the working part relative to the driving part.

Alternatively or additionally, the first interface assembly moves, preferably rotates, relative to the second interface assembly, between a locked position and an unlocked position; wherein in the locked position the first axial stop surface acts on the second axial stop wherein in the unlocked position, the first interface assembly is axially movable relative to the second interface assembly.

Alternatively or additionally, the first axial stop surface has a substantially polygonal, preferably triangular, profile, and the second axial stop surface defines a substantially polygonal, preferably triangular, passage through which the first axial stop surface passes. Pass.

Alternatively or additionally, at least one first drive surface and at least one first radial stop surface extend from the first axial stop surface, at least one first follower surface and at least one second radial stop surface Extends from the second axial stop surface.

Alternatively or additionally, the first interface assembly further includes a first transition surface connecting the at least one first drive surface and the at least one first radial stop surface, the first transition surface being opposite to the at least one first drive surface and the at least one first radial stop surface. At least one of the first radial stop surfaces is angled; the second interface assembly further includes a second transition surface connecting the at least one first follower surface and the at least one second radial stop surface, the second transition surface relative to At least one of the at least one first follower surface and the at least one second radial stop surface is angled.

Alternatively or additionally, the second interface assembly is formed with a cavity capable of receiving at least a portion of the first interface assembly in a form-fitting manner.

Alternatively or additionally, the first interface assembly is provided with a first guide portion, the second interface assembly is provided with a second guide portion cooperating with the first guide portion, the first guide portion and the second guide portion assist the first interface assembly Alignment with the second interface assembly; optionally, one of the first guide portion and the second guide portion is a concave portion, and the other is a convex portion; optionally, the first guide portion is located on the outer wall of the first interface assembly, The second guide portion is located on the inner wall of the second interface assembly.

Alternatively or additionally, at least one of the drive member and the working member includes a tensioning device that applies a tensioning force such that the first axial stop surface abuts the second axial stop surface.

Alternatively or additionally, the first interface assembly includes at least one second drive surface, the second interface assembly includes opposite at least one second driven surface, the at least one second drive surface acts on the at least one second driven surface, The working member is caused to rotate in a second direction opposite to the first direction; preferably at least one second drive surface includes three second drive surfaces, and at least one second driven surface includes three second driven surfaces.

Alternatively or additionally, one of the first interface assembly and the second interface assembly is provided with at least one pin member, the other is provided with at least one pin receiving member cooperating with the pin member, the at least one pin member and the at least one pin receiving member The component defines at least one second drive surface and at least one second driven surface.

Alternatively or additionally, the first interface assembly includes an inner housing and an outer housing, the inner housing being axially movable relative to the outer housing, the tensioning device being located between the inner housing and the outer housing.

Alternatively or additionally, one of the at least one pin member and the at least one pin receiving member is located on the outer housing.

There are a number of technical advantages in accordance with one or more embodiments of the present invention. For example, a power tool according to one or more embodiments of the present invention can realize convenient and detachable coupling between a working part and a driving part. The coupling is compact and tool-free. The electric power tool according to one or more embodiments of the present invention can realize that the working part is driven in different directions by the driving part, which can increase the convenience of use and expand the applicability.

More embodiments and beneficial technical effects of the present invention will be described in detail below.

Description of drawings

1 illustrates a schematic diagram of an operator using a trench cleaning apparatus according to some embodiments of the present invention.

2 shows a schematic diagram of a trench cleaning apparatus according to some embodiments of the present invention.

3A shows a schematic diagram of a portion of a trench cleaning apparatus having a rotary adjustment member in accordance with some embodiments of the present invention.

3B shows a schematic diagram of a portion of a trench cleaning apparatus having a toggle-type adjustment member in accordance with some embodiments of the present invention.

3C shows a schematic diagram of a portion of a trench cleaning apparatus having a toggle-type adjustment member in accordance with some embodiments of the present invention.

4 shows a schematic diagram of a trench cleaning apparatus provided with cleaning components other than working components, according to some embodiments of the present invention.

5 shows a schematic diagram of a fluid receiving mechanism of a trench cleaning apparatus according to some embodiments of the present invention.

FIG. 6 shows a schematic diagram of the positional arrangement of the fluid receiving mechanism of the trench cleaning apparatus according to some embodiments of the present invention.

FIG. 7A shows a schematic diagram of the position setting of the fluid receiving mechanism of the trench cleaning apparatus according to other embodiments of the present invention.

FIG. 7B shows a schematic diagram of the input end of the fluid receiving mechanism of FIG. 7A being interfaced with a conduit of an external fluid source.

8A shows a schematic diagram of a working member and a first interface assembly and a second interface assembly coupling the working member with the drive member.

FIG. 8B is an exploded schematic view of FIG. 8A .

8C is a cross-sectional view of FIG. 8A with working components removed for clarity.

Figure 9A shows a schematic diagram of the connector of the first interface assembly.

Figure 9B is a schematic view looking towards the head of the connector of Figure 9A.

Figure 10A shows a schematic diagram of a second interface assembly.

10B is a schematic view facing the head of the second interface assembly of FIG. 10A.

FIG. 10C is a schematic diagram of the internal structure of the second interface assembly of FIG. 10A after a part is removed.

FIG. 11 shows a schematic view of the connector of the second interface assembly of FIG. 8B being placed in the outer housing.

FIG. 12 shows a schematic diagram of the docking of the working part and the driving part according to some embodiments of the present invention.

Detailed ways

In order to facilitate the understanding of the present invention, various exemplary embodiments will be described below with reference to the related drawings.

It will be appreciated by those skilled in the art that although one or more of the following embodiments use a trench cleaning device as an example, it is only for the purpose of illustrating the concepts of the present invention. The concepts of one or more of the embodiments described below may be applied to other suitable power tools.

1 illustrates a schematic diagram of an operator or user using a trench cleaning apparatus 100 in accordance with some embodiments of the present invention. As illustrated, an operator stands on the ground and holds the gutter cleaning device 100 such that the working components of the gutter cleaning device 100 approach or contact the gutters 12 (eg, rain gutters or gutters) of the building 10. As a result, the objects to be cleaned (eg, fallen leaves, etc.) in the trench 12 are cleaned, for example, plucked off or removed in other suitable ways.

It will be understood by those skilled in the art that, in this context, the term "trench cleaning device" should not be understood literally mechanically as a device that can only be used to clean trenches. Rather, the term "trench cleaning device" includes devices for cleaning trenches as well as devices of the same or similar structures as described in one or more embodiments herein, which are capable of cleaning the subject matter described in one or more embodiments herein or similar objects, where the objects described herein or similar objects are in an environment that may be a trench, or a trench-like environment, or an environment in which it is cleaned In operation, the apparatus used is the same or similar in structure to, and employs the same or similar principles as, the apparatus described in one or more embodiments herein.

FIG. 2 shows a schematic diagram of a trench cleaning apparatus 200 according to some embodiments of the present invention. As illustrated, trench cleaning device 200 includes wand assembly 220 , handle assembly 240 , and handpiece assembly 260 . The rod assembly 220 has a first end 222 and a second end 224 opposite the first end 222 . The first end 222 is coupled with the handle assembly 240 . The second end 224 is coupled to the handpiece assembly 260, which may include, for example, a mechanical and/or electrical connection. The handpiece assembly 260 includes a driving part 270 and a working part 280 for performing trench cleaning under the driving of the driving part 270 .

The handle assembly 240 can be grasped by the operator. The handle assembly 240, for example, may be configured to include a handle or handle suitable for holding (eg, ergonomically designed). The handle assembly 240 may be provided with, for example, one or more electronic or mechanical control elements to facilitate manipulation of the trench cleaning device 200 . This is advantageous because the operator is typically deployed close to the handle assembly 240 during operation. In some embodiments, the control element may include a power control element, a speed regulating element, a forward and reverse rotation control element, and the like.

In some embodiments, the handle assembly 240 includes a component that houses a power supply, such as a battery interface 242 (eg, a battery cavity or battery receiving surface) for receiving a battery pack. A battery pack or battery pack, such as a lithium battery or other type, may be electrically and mechanically interfaced with the battery interface 242 in a suitable manner (eg, plugged, snapped, etc.) to operably power the drive components 270 . In some embodiments, the handle assembly 240 also includes a cover to close the battery interface 242 and accommodate the battery pack therebetween. Since the power supply device (eg, battery pack) is disposed at the end away from the handpiece assembly, better weight balance can be achieved. This is advantageous in some respects. For example, when cleaning the rain gutters on the eaves, the operator usually has to lift the trench cleaning device. If the power supply device is set at one end of the head assembly, the end of the head assembly will be heavier, which will affect the Operators who are in poor physical condition (eg, lack of energy) create obstacles that limit their scope of application and result in a poor user experience. Placing the power supply (eg, the battery pack) at the end remote from the handpiece assembly would avoid or alleviate these problems.

In other embodiments, the handle assembly 240 may be provided with components for interfacing with a power supply device. The power supply device is, for example, an external power grid, an energy storage device (eg, a charger), and the like. For example, the handle assembly 240 may be provided with an electrical interface, which can be connected with an external power grid or an energy storage device through electrical devices (eg, wires, adapters, converters, etc.), so as to supply power to the driving part 270 . This is advantageous in some aspects, such as reducing the weight of the trench cleaning device, so that even an operator with poor physical condition (eg, lack of strength) can easily operate it, thereby expanding its application range and enhancing user experience.

In certain embodiments, handle assembly 240 also includes a waterproof design. For example, at least a portion of the housing of the handle assembly 240, particularly the part for accommodating or interfacing with the power supply device, may be of a waterproof design. This is especially advantageous in some environments (such as inclement weather or areas with high humidity), for example, it can protect the electronic circuit or the battery accommodated in the handle assembly 240 from failure or life reduction due to contact with water or water vapor, and also Erosion of one or more elements of handle assembly 240 may be prevented. In some embodiments, a waterproof design, such as a sealing ring, is used for the joint position of the cover of the handle assembly 240 and the handle assembly 240 .

The rod-shaped member 220 extends in a direction from the first end 222 to the second end 224, which may also be referred to as the axial direction or extension direction of the rod-shaped member. In some embodiments, the rod assembly 220 is configured to be able to telescopic or change length along its own axial direction. For example, rod assembly 220 can include two or more sleeves that can be sleeved with adjacent sleeves through a suitable positioning mechanism (eg, a positioning hole or plate) or a locking mechanism (eg, a locking pin) The rod assembly 220 is adjusted to the desired length in the axial direction.

In other embodiments, the rod assembly 220 is configured to be rotatable relative to at least one of the handle assembly 240 and the handpiece assembly 260 about an extension direction. For example, within a certain angular range (eg, 5 degrees, 45 degrees, 60 degrees, 90 degrees, 180 degrees, 360 degrees), the rod assembly 220 and the handle assembly 240 or the handpiece assembly 260 can be relatively clockwise or counterclockwise. turn.

Such a design of the rod assembly 220 is advantageous. For example the height of the object to be cleaned up may vary. For another example, during cleaning, it may happen that the orientation of the working part relative to the cleaning object is not ideal, and it needs to be adjusted to achieve a better cleaning effect. Solve these problems well, improve the cleaning convenience and cleaning effect.

In some embodiments, the drive member 270 includes a motor or motor and optionally a transmission mechanism that transmits, converts, etc. the output of the motor. The output of the driving part 270 is directly or indirectly transmitted to the working part 280, so that the working part 280 operates.

The working member 280 may be constructed in a suitable manner. In some embodiments, the working member 280 is, for example, arranged to be stationary relative to the rod assembly 220 during operation, such a working member 280 may be, for example, a blowing member or a water spraying member. In some embodiments, work member 280 includes a vibrating or moving member that can vibrate or move to perform trench cleaning. The vibrating or moving part can vibrate or move back and forth with a certain frequency within a predetermined range, so as to clean the intended object. Such a working member 280 is, for example, a scraping member. In other embodiments, the working member 280 includes a rotating member that rotatably performs trench cleaning. The rotating part can rotate at a fixed or variable angular velocity in a predetermined direction to clean the intended object. The rotating member can be, for example, a brush-like member, such as a roller brush comprising at least one brush unit. In still other embodiments, the working member 280 may be a combination of two or more of the above. Other arrangements of working member 280 are also possible.

In some embodiments, optionally, the trench cleaning device is further provided with an adjusting member for adjusting the output of the driving member. The output of the drive member includes, for example, one or more of the rotational speed of the drive member, output power, and the like. For example, the regulating member can set the driving member in a specific gear position, and different gear positions correspond to different rotational speeds, output power, etc. of the driving member, thus corresponding to different input power or working power of the working member. In different gears, for example, the vibration or movement frequency, amplitude, etc. of vibration or moving parts may be different. In different gears, for example, the rotational frequency and speed of the rotating parts may be different. In this way, corresponding gears can be selected for different cleaning objects to achieve the desired cleaning effect.

The adjustment member can be switched between two or more positions or states, thereby changing the output of the drive member. The adjustment member may be provided in a suitable position and in a suitable form. For example, FIGS. 3A-3C show some examples of adjustment components, although other suitable locations for adjustment components, such as on or near handle assembly 240, are also possible. In FIGS. 3A to 3C , the adjustment member is disposed closer to the handpiece assembly 360 than the handle assembly, for example, disposed on the rod assembly 320 near the handpiece assembly 360 , or disposed on the handpiece assembly 360 close to the handpiece assembly 360 . Location of rod assembly 320 . In Figure 3A, the adjustment member 326a is provided in the configuration of a knob that can be rotated clockwise or counterclockwise to adjust the output or gear of the drive member. In FIG. 3B , the adjusting member 326b is provided as an up and down toggle type (or called an axial toggle type), which can toggle or slide in the up and down (or axial) direction (as shown by the arrow), thereby adjusting the gears bit. In FIG. 3C , the adjusting member 326c is arranged as a horizontal toggle type (or referred to as a circumferential toggle type), which can toggle or slide in the left-right (or circumferential) direction (as shown by the arrow) to adjust the gears bit.

4 shows a schematic diagram of a trench cleaning apparatus 400 according to some embodiments of the present invention, wherein the trench cleaning apparatus 400 is provided with cleaning components other than working components.

The trench cleaning device 400 includes a wand assembly 420 , a handle assembly 440 and a handpiece assembly 460 . The rod assembly 420 has a first end 422 and a second end 424 . The handle assembly 440 is provided with components that interface with the power supply, such as a battery interface 442 . Handpiece assembly 460 includes drive member 470 and working member 480 .

One major difference in trench cleaning device 400 compared to trench cleaning device 200 shown in FIG. 2 is that trench cleaning device 400 further includes cleaning member 450 operatively cooperating with working member 480 to facilitate the trenching. Slot cleaning.

As illustrated, cleaning component 450 may include a fluid ejection mechanism 456, a fluid receiving mechanism 454, and a fluid delivery mechanism, such as line 452, that establishes fluid communication between fluid ejection mechanism 456 and fluid receiving structure 454. Fluid (eg, water or solutions, etc.) from external fluid sources (eg, tanks, ponds, rivers, streams, artificially configured solution (eg, wash) pools, etc.) may enter line 452 through fluid receiving mechanism 454 and then be ejected from the fluid Mechanism 456 sprays onto work member 480 or onto at least a portion of the object to be cleaned. The jet of fluid promotes cleaning effects such as faster, more thorough, and clean cleaning. In some occasions, such as when some specific chemical substances are attached to the object to be cleaned, it is difficult or even impossible to achieve the desired cleaning effect without the participation of the fluid. Providing cleaning components in the trench cleaning device can solve or alleviate such problems.

The fluid receiving mechanism 454 is provided with an input end and an output end. The input is connected to an external fluid source, allowing fluid to enter. The output is connected to line 452 allowing fluid to be delivered to fluid injection mechanism 456 via line 452 . The fluid receiving mechanism 454 may be provided with control components to control fluid flow, including but not limited to whether or not to allow fluid entry (ie, fluid on and off), the speed of fluid flow, fluid pressure, and the like. The control components may include, for example, valve switches or structures having similar functions. The fluid receiving mechanism 454 may be provided in a suitable location. In the embodiment shown in FIG. 4 , the fluid receiving mechanism 454 is positioned adjacent to the handle assembly 440 . This is advantageous in some situations, for example to facilitate operator control of fluids during operation.

In some embodiments, at least a portion of line 452 extends in an axial direction of handle assembly 440 . In some embodiments, as illustrated, a portion of line 452 (optionally, eg, a portion adjacent to fluid ejection mechanism 456 ) is configured to have a plurality of undulating configuration or undulating configuration portion 452a. This stabilizes the fluid pressure in line 452, preventing fluid pressure in line 452 from being too strong or too weak, or uneven fluid pressure at different locations. In other words, arranging at least a portion of the pipeline in a zigzag configuration facilitates control of the fluid pressure in the pipeline, thereby facilitating control of the injection of the fluid at the nozzle. Moreover, the zigzag configuration described above also facilitates the adaptability of the tubing 452 to the adjustable length of the rod assembly 420. The pipeline 452 shown in FIG. 4 includes a continuous zigzag configuration portion 452a. In certain embodiments, line 452 may include two or more discrete zigzag configuration sections. In certain embodiments, portions of the zigzag configuration of the tubing 452 may be stretched or shortened to facilitate accommodating length adjustments of the rod assembly 420 . In certain embodiments, at least a portion of the pipeline 452, such as the zigzag configuration portion, can be elastic and can expand and contract within a certain range.

In certain embodiments, the line 452 is secured to the rod assembly 420 by one or more securing mechanisms 451 as illustrated. The securing mechanism 451 may be, for example, a guide or clamp attached to the rod assembly 420 . The guide has, for example, a guide groove for receiving a portion of the line 452 so as to stabilize the line 452 . The clamp member, for example, has a gripping portion that can grip a portion of the pipeline 452 so as to stabilize the pipeline 452 . When there is fluid passing through the line, or when the operator lifts the rod assembly, the line may dislodge, eg rock, which is undesirable. The securing mechanism stabilizes the pipeline and prevents undesired movement of the pipeline. In some embodiments, the line 452 is disposed inside the rod assembly 420 , such as through the hollow structure of the rod assembly 420 . This can make the overall design of the trench cleaning device more compact.

The fluid ejection mechanism 456 is positioned adjacent to the working member 480 . In this embodiment, the fluid ejection mechanism 456 is provided on the upper portion of the working member 480 . Although other arrangements of the fluid ejection mechanism are possible, the arrangement shown in Figure 4 is advantageous.

5 shows a schematic diagram of a fluid receiving mechanism 554 of a cleaning component of a trench cleaning apparatus according to some embodiments of the present invention. The fluid receiving mechanism 554 may be, for example, an embodiment of the fluid receiving mechanism 454 described in connection with FIG. 4 .

As exemplified, the fluid receiving mechanism 554 is fixedly connected to the rod assembly 520 of the trench cleaning device (may be integrally formed or a discrete component fixedly connected), thereby increasing the stability of the fluid receiving mechanism 554. The fluid receiving mechanism 554 has an input 5542 for interfacing with an external fluid source. Optionally, the input end 5542 includes a quick connect feature to allow quick, convenient tool-less interfacing of the fluid receiving mechanism 554 with an external fluid source (eg, tubing connected to the external fluid source). The output 5544 of the fluid receiving mechanism 554 is fluidly connected to a fluid delivery mechanism, such as line 552 , for delivering fluid to the line 552 .

The fluid receiving mechanism 554 is also provided with control components 5546 for controlling one or more of fluid on-off, fluid pressure, or flow velocity. In this embodiment, the control component 5546 is exemplified as a valve switch, which can be pivoted with P as the pivot axis within a certain range (for example, toward the A or B direction) to control the amount of fluid entering the pipeline 552 per unit time, Thereby, the flow rate, flow rate, and fluid pressure, etc. of the fluid in line 552 can be controlled. To illustrate pivoting, Figure 5 shows an illustration of the control member 5546 in two different positions, with the control member 5546a in the other position shown in phantom.

The control component 5546 may be provided in other suitable forms. For example, in some embodiments, the control member 5546 is provided in the form of a knob that can be rotated clockwise or counterclockwise to place fluid control in different gears. In some embodiments, the control member 5546 is configured as a slider that can slide back and forth along a generally straight line. In some embodiments, the control member 5546 is configured as a press that can be pressed or released generally along a straight line. In still other embodiments, the control component 5546 may include electronic switches, which may be controlled by electronic devices.

The fluid receiving mechanism may be mounted at a suitable location on the trench cleaning device, for example, may be provided at a specific location on the rod assembly. In certain embodiments, the fluid receiving mechanism is adjustable at various positions along the rod assembly. This has different technical advantages in fluid control. Some embodiments regarding the arrangement of the fluid receiving mechanism are illustrated in Figures 6 and 7A-7B.

As shown in FIG. 6 , when operating the trench cleaning device, the operator usually holds the handle assembly 640 with one hand (eg, right hand) and the grip 60 of the rod-shaped assembly with the other hand (eg, left hand). In Fig. 6, the fluid receiving mechanism 654 of the cleaning part of the trench cleaning device is arranged close to the grip part 60, the input end of which is connected to the pipeline 653 of the external fluid source, and the output end is connected to the pipeline 652 of the cleaning part. The advantage of the arrangement as shown in FIG. 6 is that during operation, the hand of the operator holding the grip portion can easily manipulate the control member 6546 of the fluid receiving mechanism 654, so that the fluid can be effectively and conveniently controlled. It should be noted that, in FIG. 6 , since the predetermined distance between the fluid receiving mechanism 654 and the handle assembly 640 is large enough, the hand of the operator holding the handle assembly 640 cannot operate the control part 6546 without disengaging the handle assembly 640 .

In Figures 7A and 7B, the input end of the fluid receiving mechanism 754 of the cleaning part of the trench cleaning device is connected to the pipeline 753 of the external fluid source, and the output end is connected to the pipeline 752 of the cleaning part. The fluid receiving mechanism 754 is disposed between the handle assembly 740 and the grip portion 70 of the rod assembly at a position close to the handle assembly 740 (either in contact with the handle assembly, or close but not in contact), thereby allowing the operator to hold the handle The hand of the assembly 740 can conveniently manipulate the control member 7546 of the fluid receiving mechanism 754 without disengaging from the handle assembly 740, thereby effectively and conveniently controlling the fluid. The arrangement shown in Figures 7A and 7B also has the advantage that better weight balance can be achieved because the center of gravity of the fluid in the conduit 753 is lower when there is fluid flow, and at the same time the fluid in the conduit 753 is in contact with the handle Assemblies 740 together allow for better center-of-gravity balance relative to a handpiece assembly disposed at the opposite end of the rod assembly. In addition, the arrangement shown in FIGS. 7A and 7B also allows the operator to have a more natural posture when operating, while facilitating the operator to interface the conduit 753 with the input end of the fluid receiving mechanism 754 . As shown in FIG. 7B , when docking, the operator can press the handle assembly 740 against the body, and then use the hand originally holding the handle assembly 740 to conveniently realize the docking.

Figures 8A-11 show schematic diagrams of an interface assembly that couples the working member with the drive member. The illustrated work member 80 may be a specific implementation of the work member described in accordance with one or more of the above embodiments.

In some embodiments, the working member 80 is connected to the output 1000 of the drive member (not shown), eg, through the first interface assembly 900 and the second interface assembly 800 . The output end 1000 may be used as a part of the driving component, may also be used as a part of the first interface assembly 900, or may be provided as a separate component. In some embodiments, the second interface assembly 800 may be part of the work component 80 or may be provided as a separate element. In some embodiments, the first interface assembly 900 may be provided as part of the drive component, or may be provided as a separate component. In some embodiments, the first interface assembly 900 and the second interface assembly 800 may both be part of the working part 80, and may also be part of the driving part.

In some embodiments, the first interface assembly 900 and the second interface assembly 800 are configured such that the drive member drives the working member 80 to rotate in a first direction (eg, clockwise). In some embodiments, the first interface assembly 900 and the second interface assembly 800 are configured such that the driving member drives the working member 80 to rotate in a second direction (eg, counterclockwise) different from the first direction. In still other embodiments, the first interface assembly 900 and the second interface assembly 800 are arranged such that the driving member drives the working member 80 to switch between the first direction and the second direction, thereby, according to needs, when desired direction of rotation.

In some embodiments, one of the first interface assembly 900 and the second interface assembly 800 is switchable between a locked position and an unlocked position relative to the other. In the locked position, the relative positions of the first interface assembly 900 and the second interface assembly 800 are locked and cannot be changed, and in the unlocked position, the relative positions of the two can be adjusted, such as relative radial rotation, axial movement, or a combination thereof. The locked position may be achieved, for example, by coupling at least a portion of the first interface assembly 900 with at least a portion of the second interface assembly 800 . The unlocked position can be achieved, for example, by decoupling the coupling of the two.

In certain embodiments, such as shown in FIG. 8B , the first interface assembly 900 includes an outer housing 920 and a connector 940 disposed at least partially within the outer housing 920. The connector 940 is axially movable relative to the outer housing 920, for example. In the description in conjunction with FIGS. 8A to 11 , the axial direction refers to the extending direction of the first interface assembly 900 toward the second interface assembly 800 , or the extending direction of the second interface assembly 800 toward the first interface assembly 900 . In some embodiments, the outer surface of the connector 940 may be considered the inner housing. A space, such as a cavity, may be defined between the inner and outer housings 920 for accommodating one or more other components, such as the tensioning device 960 .

In certain embodiments, such as shown in FIG. 9A , the connector 940 includes a head 941 , a body 943 , and a neck 945 connecting the head 941 and the body 943 . The head 941, the body 943, and the neck 945 may be integrally formed, for example.

The head portion 941 may be configured to be suitably shaped and to interface with the second interface assembly 800 in a suitable manner, for example. In certain embodiments, the cross-sectional diameter of neck 945 may be smaller than the cross-sectional diameters of head 941 and body 943 in a plane perpendicular to the direction extending from head 941 to body 943 . Thus, the connector 940 forms a circumferentially recessed area 945a at the neck 945, thereby allowing at least a portion of the second interface assembly 800 to extend into the circumferentially recessed area 945a, thereby facilitating the connection between the first interface assembly 900 and the second interface assembly Butt between 800. In certain embodiments, at least a portion of the body 943 defines a hollow structure 943a, thereby allowing at least a portion of the output end 1000 of the drive member disposed at the opposite end of the head 941 to enter the hollow structure 943a to a distance to couple therewith, thereby facilitating The first interface assembly 900 is docked with the output end 1000 .

In certain embodiments, at least a portion of the head 941 of the connector 940 can extend into the second interface assembly 800 . In certain embodiments, the head 941 and neck 945 of the connector 940 and at least a portion of the body 943 can extend into the second interface assembly 800 . In some embodiments, the head 941 is configured to include three protrusions 952 , 954 , 956 . Optionally, the three protrusions 952 , 954 and 956 are symmetrically distributed along the circumferential direction, and two adjacent protrusions form an included angle of 120 degrees.

In some embodiments, the second interface assembly 800 includes a head 820 and a body 860 . A body 860 extends axially from the head 820 and is coupled to the working member 80 at a distal end 862, such as to a central axis of the working member 80, such as extending into the central axis for engagement therewith.

Head 820 may be coupled to head 941 in a suitable manner. For example, the head 820 may be formed with a cavity 810 that can receive at least a portion of the first interface assembly 900 , such as the head 941 , in a form-fitting manner. In some embodiments, the inner wall of the head 820 located on the cavity 810 is provided with a flange 812 extending toward the cavity 810 . The flanges 812 at different locations on the inner wall extend to different degrees, thereby defining a shape similar to that of the head 941 . In certain embodiments, the head 941 can pass through the channel defined by the flange 812 and a portion or all of the flange 812 can be received in the circumferential recessed region 945a, thereby coupling the head 941 in the head 820.

In certain embodiments, the first interface assembly 900 includes at least one first drive surface 946 and the second interface assembly 800 includes at least one opposite first driven surface 846 . The first driving surface 946 is formed, for example, at a specific position of the outer peripheral surface of the head 941 (eg, the portion where the protrusions 952 , 954 , and 956 extend in the axial direction). The first driven surface 846 is formed, for example, at a specific location of the inner wall of the cavity 810 defined by the head 820, such as the portion of the inner wall of the cavity 810 that extends axially from the specific location of the flange 812, so that when the first interface When the assembly 900 and the second interface assembly 800 are coupled, the first driving surface 946 and the first driven surface 846 can match and function with each other. In certain embodiments, in operation, the first drive surface 946 acts on the first driven surface 846, thereby allowing the working member 80 to rotate in a first direction, such as a clockwise direction, under the drive of the drive member . The number of drive and output surfaces can depend, for example, on the design of the head. In the embodiment shown in FIGS. 9A-10C , three first driving surfaces and three first driven surfaces are included. In some embodiments, the number of the first driving surface and the first driven surface may be less than three (eg, one, two) or more than three, such as four, six, etc.

In certain embodiments, the first interface assembly 900 includes at least one first radial stop surface 944 and the second interface assembly 800 includes at least one opposing second radial stop surface 844. The first radial stop surface 944 may, for example, be formed at a specific position of the head 941, for example, may be provided on the surface of the head 941 facing the circumferential recessed area 945a. In some embodiments, the first radial stop surface 944 may be formed as a side surface of the head 941 facing a protrusion of the circumferential recessed area 945a, the side surface being substantially parallel to the axial direction or at an angle, such as not More than 10 degrees, not more than 30 degrees, or not more than 45 degrees. The second radial stop surface 844 is formed, for example, at a specific location on the inner wall of the cavity 810 defined by the head 820, and may be provided, for example, on a face of the flange 812 facing the distal end 862, the face being substantially parallel to the axial direction or Have an angle, such as no more than 10 degrees, no more than 30 degrees, or no more than 45 degrees. In certain embodiments, in operation, the first radial stop surface 944 acts on the second radial stop surface 844 to limit rotation of the working member 80 in a second direction opposite to the first direction. In the embodiment shown in FIGS. 9A-10C , three first radial stop surfaces and three second radial stop surfaces are included. In some embodiments, the number of the first radial stop surface and the second radial stop surface may each be less than three (eg, one, two) or more than three, eg, four, six, etc.

In certain embodiments, the first interface assembly 900 includes a first axial stop surface 942 and the second interface assembly 800 includes a second axial stop surface 842 . The first axial stop surface 942 may, for example, be formed at a specific position of the head 941, for example, may be provided on the surface of the head 941 facing the circumferential recessed area 945a. For example, the surface may be substantially perpendicular to the axial direction or have a certain angle, for example, the angle between the normal of the surface and the axial direction may be no greater than 5 degrees, no greater than 15 degrees, or no greater than 30 degrees. The second axial stop surface 842 is formed, for example, at a specific location on the inner wall of the cavity 810 defined by the head 820 , and may be provided, for example, on the face of the flange 812 facing the distal end 862 . For example, the surface can be substantially perpendicular to the axial direction or have a certain angle, for example, the angle between the normal of the surface and the axial direction can be no more than 5 degrees, no more than 15 degrees, or no more than 30 degrees. In certain embodiments, the first axial stop surface 942 may act on the second axial stop surface 842 to limit axial movement of the working member 80 relative to the drive member.

In certain embodiments, the first interface assembly 900 is movable relative to the second interface assembly 800 between a locked position and an unlocked position. The movement may be, for example, radial rotation, axial translation, or a combination thereof. In certain embodiments, in the locked position, the first axial stop surface 942 acts on the second axial stop surface 842, thereby inhibiting relative movement of the first interface assembly 900 and the second interface assembly 800. In the unlocked position, the first axial stop surface 942 and the second axial stop surface 842 are disengaged, thereby allowing relative axial movement of the first interface assembly 900 and the second interface assembly 800 .

In certain embodiments, the first axial stop surface 942 has a generally polygonal profile, such as a triangular profile. The second axial stop surface 842 defines a generally polygonal channel, such as a triangular channel, for the first axial stop surface 942 to pass through, thereby allowing the first and second axial stop surfaces 942 and 942 to pass through. 842 coupling and decoupling.

In certain embodiments, the first drive surface 946 and the first radial stop surface 944 extend from the first axial stop surface 942 and the first follower surface 846 and the second radial stop surface 844 extend from the second Axial stop surface 842 extends.

In certain embodiments, the first interface assembly 900 also includes a first transition surface 948 connecting the at least one first drive surface 946 and the at least one first radial stop surface 944. The first transition surface 948 may be provided, for example, on a surface of the head 941 facing the circumferential recessed area 945a. The first transition surface 948 is angled relative to at least one of the first drive surface 946 and the first radial stop surface 944, eg, 5 degrees, 10 degrees, 30 degrees, 60 degrees, 90 degrees, 120 degrees. In some embodiments, the first transition surface 948 and the first driving surface 946 form an angle greater than 90 degrees, such as 95 degrees to 110 degrees, 100 degrees to 120 degrees, and so on. In some embodiments, the first transition surface 948 and the first radial stop surface 944 are at an angle of less than 90 degrees, such as 70 degrees to 85 degrees, 60 degrees to 75 degrees, and the like.

In certain embodiments, the second interface assembly 800 also includes a second transition surface 848 connecting the at least one first follower surface 846 and the at least one second radial stop surface 844. The second transition surface 848 may be provided, for example, on the face of the flange 812 facing the distal end 862 . The second transition surface 848 is angled relative to at least one of the first follower surface 846 and the second radial stop surface 844, eg, 10 degrees, 30 degrees, 60 degrees, 90 degrees, 120 degrees.

In some embodiments, the first interface assembly 900 is provided with a first guide portion, and the second interface assembly 800 is provided with a second guide portion that cooperates with the first guide portion. The first and second guides assist in the alignment of the first and second interface assemblies. In some embodiments, the first guide portion includes one or more concave portions 914 and the second guide portion includes one or more convex portions 814 . In certain embodiments, recess 914 is formed, for example, in the outer peripheral wall of body 943 of connector 940 and extends axially. The protrusions 814 are formed, for example, on the inner wall of the cavity 810 of the head 820 and extend axially. The recesses 914 can receive corresponding protrusions 814 to facilitate alignment between the first interface assembly 900 and the second interface assembly 800 . The number of the concave parts 914 and the convex parts 814 can be set according to actual needs. Optionally, three concave portions and corresponding three convex portions are provided. In some embodiments, the number of recesses and protrusions may each be one, two, or more than three. In certain embodiments, the first guide portion includes one or more convex portions and the second guide portion includes one or more concave portions. In still other embodiments, both the first guide portion and the second guide portion include one or more concave portions and one or more convex portions, as long as the concave portion of one guide portion corresponds to the convex portion of the other guide portion.

In some embodiments, at least one of the drive member and the work member includes a tensioner 960. The tensioning device 960 includes, for example, an elastic member, such as a spring. The tensioning device may apply a tensioning force such that the first axial stop surface 942 abuts the second axial stop surface 842, thereby facilitating the coupling between the first interface assembly 900 and the second interface assembly 800 during operation. In certain embodiments, the end of the body 943 of the connector 940 remote from the head 941 is provided with a circumferential flange 947 . The cross-sectional diameter of the circumferential flange 947 is larger than the cross-sectional diameter of the remainder of the body 943 . As such, the tensioning device 960 may be positioned between the outer wall (ie, inner housing) of the connector 940 and the outer housing 920 , and constrained between the circumferential flange 947 and the head 820 .

In some embodiments, the first interface assembly 900 includes at least one second driving surface, and the second interface assembly 800 includes at least one opposing second driven surface. The second driving surface acts on the at least one second driven surface, so that the working member 80 rotates in a second direction opposite to the first direction.

In some embodiments, one of the first interface assembly 900 and the second interface assembly 800 is provided with at least one pin member, the other is provided with at least one pin receiving member that cooperates with the pin member, at least one pin member and at least one The pin receiving member defines at least one second drive surface and at least one second driven surface. In some embodiments, the face of the outer housing 920 of the first interface assembly 900 facing the head 941 is provided with three pin members 922 , 924 , 926 . Optionally, the three pin members 922, 924, 926 are located on the same circumference and are evenly arranged. Correspondingly, the surface of the head 820 of the second interface assembly 800 facing the first interface assembly 900 is provided with three pin receiving parts 822, 824, 826, such as three holes, for receiving the corresponding pin parts 922, 924, 926. The surfaces at which the pin member and the corresponding pin-receiving member contact each other define a second driving surface and a second driven surface, respectively. Thereby, three second drive surfaces and three second output surfaces are defined. In some embodiments, there may be fewer (eg, one, two) or more (eg, more than three) second drive surfaces and second driven surfaces.

In some embodiments, a pin member is provided on the second interface assembly 800 , such as at a suitable location on the head 820 . A pin receiving member is provided on the first interface assembly 900 , for example, at a suitable location on the outer housing 920 . In still other embodiments, the first interface assembly 900 is provided with a pin component and a pin receiving component at the same time, and the second interface component 800 is provided with a corresponding pin receiving component and a pin component at the same time.

Figure 12 shows a schematic diagram of the working part 1280 interfacing with the driving part 1270 according to some embodiments of the present invention. In this embodiment, the working member 1280 is illustrated as a brush, and the driving member 1270 is illustrated as including a motor and its appendages (eg, a motor housing, a transmission mechanism, etc.). When docking, the operator can insert the second interface component connected with the brush into the first interface component connected with the motor output, and then rotate the brush (or rotate the driving part 1270, as long as there is relative rotation), and at the same time, the first interface component A tensioning device (such as a spring) in the fuselage exerts an elastic force to facilitate the docking between the interface components. To remove the brush, the operator only needs to overcome the elastic force and then turn the brush in the opposite direction.

It should be understood by those skilled in the art that the embodiments herein are only for the purpose of illustrating the present invention, rather than limiting the present invention.

Furthermore, one drawing may show multiple elements. It will be understood by those skilled in the art that this is for brevity only and does not imply that every element is required. Those skilled in the art will understand that one or more elements in the same figure may be alternative or additional elements.

It should also be understood by those skilled in the art that the above embodiments are intended to illustrate one or more ideas of the present invention from different aspects, and they are not isolated; Make appropriate combinations to get other technical solution examples.

Unless otherwise defined, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Embodiments of the invention are illustrated in non-limiting examples. On the basis of the above disclosed embodiments, various modifications that can be conceived by those skilled in the art fall within the scope of the present invention.

Claims (23)

1. A power tool, characterized in that the power tool comprises:

a rod assembly having a first end and a second end opposite the first end;

a handle assembly coupled to the first end; and

a head assembly coupled to the second end, the head assembly including a drive member and a working member removably coupled to the drive member to perform trench cleaning,

wherein the drive member is capable of driving the working member to rotate in a first direction.

2. The power tool of claim 1, wherein the power tool is a trench cleaning device.

3. The power tool of claim 1, wherein the drive member includes a first interface assembly including at least one first drive surface and the working member includes a second interface assembly including at least one first driven surface opposite, the at least one first drive surface acting on the at least one first driven surface to cause rotation of the working member in the first direction.

4. The power tool of claim 3, wherein the at least one first drive face comprises three first drive faces and the at least one first driven face comprises three first driven faces.

5. The power tool of claim 3, wherein the first interface component includes at least one first radial stop surface and the second interface component includes at least one second opposing radial stop surface, the at least one first radial stop surface acting against the at least one second radial stop surface to limit rotation of the working member in a second direction opposite the first direction.

6. The power tool of claim 5, wherein the at least one first radial stop surface includes three first radial stop surfaces and the at least one second radial stop surface includes three second radial stop surfaces.

7. The power tool of claim 5, wherein the first interface assembly includes a first axial stop surface and the second interface assembly includes a second axial stop surface, the first axial stop surface acting against the second axial stop surface to limit axial movement of the working element relative to the drive element.

8. The power tool of claim 7, wherein the first interface assembly moves between a locked position and an unlocked position relative to the second interface assembly; wherein in the locking position the first axial stop surface acts on the second axial stop surface; wherein in the unlocked position, the first interface assembly is axially movable relative to the second interface assembly.

9. The power tool of claim 8, wherein the first interface assembly rotates relative to the second interface assembly between a locked position and an unlocked position.

10. The power tool of claim 8, wherein the first axial stop surface has a polygonal profile and the second axial stop surface defines a polygonal passage for the first axial stop surface to pass through.

11. The power tool of claim 10, wherein the first axial stop surface has a triangular profile and the second axial stop surface defines a triangular channel.

12. The power tool of claim 7, wherein the at least one first drive surface and the at least one first radial stop surface extend from the first axial stop surface, and the at least one first driven surface and the at least one second radial stop surface extend from the second axial stop surface.

13. The power tool of claim 5, wherein the first interface assembly further includes a first transition surface connecting the at least one first drive surface and the at least one first radial stop surface, the first transition surface being angled relative to at least one of the at least one first drive surface and the at least one first radial stop surface; the second interface assembly further includes a second transition surface connecting the at least one first driven surface and the at least one second radial stop surface, the second transition surface being angled relative to at least one of the at least one first driven surface and the at least one second radial stop surface.

14. A power tool according to any one of claims 3 to 13, wherein the second interface member forms a cavity that can receive at least a portion of the first interface member in a form-fitting manner.

15. The power tool according to any one of claims 3 to 13 wherein the first interface component is provided with a first guide and the second interface component is provided with a second guide that mates with the first guide, the first and second guides assisting in alignment of the first and second interface components.

16. The electric power tool according to claim 15, wherein one of the first guide portion and the second guide portion is a concave portion, and the other is a convex portion.

17. The power tool of claim 15, wherein the first guide is located on an outer wall of the first interface component and the second guide is located on an inner wall of the second interface component.

18. The power tool according to claim 7 wherein at least one of the drive component and the working component includes a tensioning device that applies a tensioning force such that the first axial stop surface abuts the second axial stop surface.

19. The power tool of claim 18, wherein the first interface assembly includes an inner housing and an outer housing, the inner housing being axially movable relative to the outer housing, the tensioning device being located between the inner housing and the outer housing.

20. The power tool of claim 3, wherein the first interface assembly includes at least one second drive surface and the second interface assembly includes at least one second, opposite driven surface, the at least one second drive surface acting on the at least one second driven surface to rotate the working member in a second direction opposite the first direction.

21. The power tool of claim 20, wherein the at least one second drive face comprises three second drive faces and the at least one second driven face comprises three second driven faces.

22. The power tool of claim 20, wherein one of the first and second interface assemblies is provided with at least one pin member and the other is provided with at least one pin receiving member cooperating with the pin member, the at least one pin member and the at least one pin receiving member defining the at least one second drive surface and the at least one second driven surface.

23. The power tool of claim 22, wherein the first interface assembly includes an inner housing and an outer housing, one of the at least one pin member and the at least one pin receiving member being located on the outer housing of the first interface assembly.

Images