CN112937977B - Vegetable film sealing device based on crank rocker mechanism - Google Patents

Abstract

The invention discloses a vegetable sealing device based on a crank rocker mechanism. The vegetable sealing device includes a casing, a sealing mechanism, and a pulling mechanism. mechanism, the film pulling mechanism uses a worm gear mechanism to unfold the fresh-keeping film, and the film sealing mechanism uses a crank rocker mechanism to seal the fresh-keeping film on the vegetable fresh-keeping box, and the film sealing mechanism uses a crank rocker mechanism from four different directions. The plastic wrap is cut. The invention is scientific and reasonable, safe and convenient to use. The film sealing mechanism can cut the plastic wrap in four different directions through a motor and a crank rocker mechanism. The sealing film device is not only easy to drive, but also very convenient to maintain. .

Description

Vegetable film sealing device based on crank rocker mechanism

technical field

The invention relates to the technical field of vegetable sealing, in particular to a vegetable sealing device based on a crank rocker mechanism.

Background technique

With the development of science and technology and the improvement of living standards, people not only pay more attention to the quality of vegetables, fruits and other commodities, but also continuously improve their packaging requirements, especially for the fresh-keeping film packaging that can breathe and keep fresh. However, due to the fact that most of the fresh-keeping film packaging of fruits and vegetables currently relies on manual operations, the average efficiency is low, and because the output of fruits and vegetables is relatively large, the time required for packaging should be shortened as much as possible under the premise of ensuring the freshness of fruits and vegetables as much as possible. The work of workers is very heavy, it is easy to make people feel tired, and it is difficult to maintain high efficiency for a long time. Therefore, the research and development of automatic plastic wrap packaging equipment for fruits and vegetables is very necessary. In the whole process of vegetable and fruit plastic wrap packaging, packaging the sorted vegetables and fruits is an important step. After putting the fruits and vegetables to be packaged into the tray, put it in the designated position of the plastic wrap packaging device, the device will automatically apply the film, then push the tray containing the fruits and vegetables to complete the wrapping, and finally wrap the plastic wrap through the film cutting part. Cutting, sealing film and packaging are completed, thus greatly improving the efficiency of plastic wrap packaging for agricultural products such as fruits and vegetables.

The existing film sealing device can only squeeze and cut the plastic wrap from three directions, and when the film sealing device is working, three mechanisms must be controlled to move in different directions. The driving device is complex due to the installation of multiple drives, and the movement in the three directions is not unrelated. During the cutting process, the movement process needs to be controlled to ensure that the longitudinal cutting member and the transverse cutting member start to move at the same time, and at the same time achieve a suitable Therefore, in order to avoid complicated driving, it is necessary to improve the device to simplify the driving, and make the control as simple as possible or use machinery to realize the control.

In order to solve the problem of complex drive and high cost of the sealing film device, the device uses a crank rocker mechanism and a roller chute linkage mechanism to simplify the drive, and this device prevents the plastic wrap of the sheared part from being broken when pulled , A sleeve is also provided to solve the above problems.

Contents of the invention

The object of the present invention is to provide a vegetable sealing device based on a crank-rocker mechanism to solve the problems raised in the prior art.

In order to achieve the above object, the present invention provides the following technical solutions: a vegetable sealing device based on a crank rocker mechanism, the vegetable sealing device includes a casing, a sealing mechanism, and a pulling mechanism, and the inside of the casing is sequentially arranged from left to right. A film sealing mechanism and a film pulling mechanism are provided. The film pulling mechanism uses a worm gear mechanism to unfold the fresh-keeping film. The film sealing mechanism uses a crank rocker mechanism to seal the plastic wrap on the vegetable fresh-keeping box. The film sealing mechanism uses a crank to shake The rod mechanism cuts the plastic wrap from four different directions. The film sealing mechanism realizes the cutting of the plastic wrap in four different directions through a motor and a crank rocker mechanism. The film sealing device is not only easy to drive, but also very convenient to maintain.

As a preferred technical solution, a supporting air cylinder is provided inside the housing, the supporting air cylinder is located below the film pulling mechanism, and a riser is arranged inside the housing, and the vertical board separates the housing into a power space and a sealing space. Membrane space, two groups of horizontal plates are arranged sequentially from top to bottom in the power space, and a bearing plate is horizontally arranged in the sealing film space; the sealing film mechanism includes a power component and a sealing film component, and the power component is set In the power space, the power assembly is rotatably connected to the film sealing assembly, and the film sealing assembly is arranged above the bearing plate; the film pulling mechanism includes a traction assembly, a rotating shaft, and a stopper, and the rotating shaft is rotatably connected to the traction assembly. The rotating shaft is rotationally connected with the stopper. The supporting cylinder lifts the fresh-keeping box with vegetables so that the fresh-keeping box is in contact with the fresh-keeping film, the vertical plate separates the inner space of the shell, the horizontal plate provides support for the installation of the extension shell, and the bearing plate provides support for the installation of the sealing film component. Support, the power component provides sealing film power for the sealing film component, the sealing film component cuts the plastic wrap from four different directions, the traction component unrolls and pulls the plastic wrap roll, and the rotating shaft provides support for the installation of the plastic wrap roll, preventing movement The device restricts the rotation of the shaft.

As a preferred technical solution, the power assembly includes a power machine, a rocker, and an extension shell. The power machine is arranged on the inner lower surface of the shell, and a rotating shaft is arranged on the power machine. A crank, An eccentric wheel, the eccentric wheel is located between two sets of horizontal plates, the extension shell is located between the two sets of horizontal plates and is fixed to the vertical plate, the eccentric wheel is rotatably connected to the extension shell, and the crank is rotatably connected to the rocker , the other end of the rocker is rotatably connected with the sealing film assembly. The power machine provides power for the rotation of the crank and the eccentric wheel. The rotating shaft transmits the power of the power machine. The crank drives the rocker to rotate. The rocker converts circular motion into linear motion and drives the sealing film assembly to move. The airbag is squeezed, and the extension shell provides a space for the airbag to be installed.

As a preferred technical solution, a through groove is provided on the extension shell shell, and a push plate and an air bag are sequentially arranged in the extension shell from left to right, and a connecting rod is symmetrically arranged on the side of the push plate close to the eccentric wheel. The upper and lower end surfaces of the eccentric wheel are provided with chute, the two sets of connecting rods are L-shaped, the L ends of the two sets of connecting rods are located in the chute, the two sets of connecting rods are connected to the eccentric wheel through the chute, and the push plate The eccentric wheel is rotatably connected through the connecting rod and the chute, and the extension shell is rotatably connected with the eccentric wheel through the push plate and the chute. The through groove provides a channel for the eccentric wheel to pass through the extension shell. When the push plate is forced to move toward the inside of the extension shell, the air bag is squeezed. After being squeezed, the air bag fills the extension rod with air.

As a preferred technical solution, the sealing film assembly includes at least two sets of longitudinal rods, at least two sets of support plates, and at least four sets of longitudinal plates, at least two sets of screw rods are arranged on the two sets of support plates, and the two sets of screw rods There are two groups of cross-cutting boards arranged symmetrically on the upper side. The upper end surfaces of the two groups of cross-cutting boards are symmetrically provided with chute. Two groups of two are arranged on the vertical boards and the inner wall of the shell respectively. A sliding rod is arranged between the two groups of vertical boards. Both ends of the two groups of vertical rods are provided with collars, and the collars are set on the On the slide bar, two groups of rollers are arranged symmetrically on the longitudinal rods of the two groups. The cross-cutting plates of the group are connected by rotation. The longitudinal plate provides support for the installation of the slide bar, the longitudinal bar is slidably installed on the slide bar, the longitudinal bar longitudinally squeezes the plastic wrap, the support plate provides support for the installation of the screw rod, and the screw rod provides support for the installation of the cross-cutting plate, The two groups of cross-cutting plates cooperate with each other to horizontally squeeze and cut the plastic wrap, and the rollers move in the chute and drive the longitudinal bar to move on the slide bar.

As a preferred technical solution, an extension rod is provided on the cross-cutting plate near the side of the vertical plate, and the extension rod includes an extension connecting rod and an extension sleeve sleeved on the extension connecting rod, and one end of the extension connecting rod It is rotatably connected with the rocker, and the other end of the extension link is provided with an extension plate. The extension plate is located inside the extension sleeve and is slidably connected with the extension sleeve. The extension plate is closely connected with the inner surface of the extension sleeve. The extension sleeve A ventilation hole is provided at one end of the shell close to the cross-cutting plate, and the extension shell is connected with the extension shell by pipes. The extension rod extends the moving distance of the cross-cutting plate on the screw rod, and at the same time, the extension rod provides power for the movement of the cross-cutting plate. The extension connecting rod and the extension casing cooperate with each other to form a complete extension rod. An extension space is formed below, and the air bag inside the extension shell is compressed to transport gas into the extension space.

As a preferred technical solution, the traction assembly includes a traction shaft, a traction motor, a gear transmission group, and at least four sets of shaft support plates, and the four sets of shaft support plates are arranged in pairs on the vertical plate and the inner wall of the housing respectively. The two groups of shaft support plates on the board are provided with rotating shafts, the two groups of shaft support plates on the inner wall of the housing are provided with traction shafts, the traction motor is arranged on the inner wall of the housing, and the traction motor is connected to the traction shaft. The traction motor is provided with a helical gear, one end of the gear transmission group is connected to the helical gear in rotation, and the other end of the gear transmission group is provided with a worm, and the worm is connected to the rotation shaft in rotation. The traction shaft unrolls the plastic wrap roll, the traction motor provides power for the rotation of the traction shaft, the gear transmission group transmits the power of the traction motor to the shaft, the support plate provides support for the installation of the shaft and the traction shaft, and the helical gear and gear transmission The group is rotationally connected to transmit the power on the traction motor to the gear transmission group, and the worm is rotationally connected to the rotating shaft to transmit the rotational power to the shaft.

As a preferred technical solution, the rotating shaft includes a follower shaft and a worm wheel, and the follower shaft is provided with a shaft support plate, a limit plate, a sleeve, a driven plate, a reaction plate, and a shaft support plate in sequence from left to right, The sleeve is sleeved on the follower shaft, the driven plate is located in the sleeve, the worm gear is sleeved on the sleeve and connected with the sleeve in rotation, resistance plates are arranged on both sides of the worm gear, and the worm gear and the worm Rotationally connected, the limiting plate is rotatably connected with the stopper. The shaft support plate provides installation support for the follower shaft. The follower shaft drives the plastic wrap roll to rotate. The worm wheel is connected to the worm and transmits the rotating power to the sleeve. The limit plate controls the position of the sleeve on the follower shaft. At the same time, the rotation of the follower shaft is limited under certain conditions. The sleeve moves to the left on the follower shaft under the drive of the worm wheel and drives the follower shaft to rotate. The follower plate is welded on the follower shaft. When When the sleeve moves to the leftmost end, the sleeve and the driven plate carry out gear transmission and drive the follower shaft to rotate, the reaction plate moves to the left under the push of the sleeve, and several groups of springs are arranged between the reaction plate and the shaft support plate , when the reaction plate moves to the left, the spring is compressed, the resistance plate limits the position of the worm wheel, and at the same time adds a certain amount of rotational resistance to the rotation of the worm wheel, and the stopper realizes the rotation limitation of the follower shaft through the limit plate.

As a preferred technical solution, the worm wheel includes two sets of wheel shells, gear rings, and rotating rings. Two sets of ring grooves are provided on the opposite side end surfaces of the two sets of wheel shells. The gear rings and rotating rings are respectively located in the two sets of In the ring groove, the diameter of the rotating ring is smaller than the diameter of the gear ring and the rotating ring is located in the gear ring, the gear ring and the rotating ring are both connected to the wheel housing in rotation, the gear ring is connected to the worm in rotation, the The rotating ring is rotatably connected with the sleeve, and the wheel housing is provided with a fixed ring between the gear ring and the rotating ring. The wheel shell provides support for the installation of the gear ring and the rotating ring. The gear ring is connected to the worm in rotation, the fixed ring is integrated with the wheel shell, and the rotating ring is connected to the sleeve in rotation. The shell drives the rotating ring to rotate.

As a preferred technical solution, the outer surface of the gear ring is provided with gear teeth, the inner surface of the gear ring is provided with several groups of push blocks, the fixed ring is fixed with two sets of wheel housings, and several groups of through grooves are arranged on the fixed ring. And the outer surface of the fixed ring is provided with several groups of baffles, several groups of said baffles are located on one side of several groups of through grooves, several groups of sliders are arranged between said gear ring and the fixed ring, said baffles and sliding blocks There is one-to-one correspondence between the block and the slider, and a spring is arranged between the stopper and the slider. The side of several groups of the sliders in contact with the fixed ring is provided with a large thorn claw, and the end surface of the side of the rotating ring close to the fixed ring is provided with several A group of small thorn claws, several groups of large thorn claws correspond to several groups of small thorn claws one by one, and several groups of large thorn claws pass through the through groove and are rotatably connected with the small thorn claws. The push block pushes the slider so that the big thorn claw on the slider protrudes out of the slot and connects with the small thorn claw. The big thorn claw and the small thorn claw cooperate with each other to transmit the power to the rotating ring, and the spring provides feedback for the slider. Pushing force makes the slider return to the original position, so that the big thorn claw retracts into the through groove.

Compared with prior art, the beneficial effect of the present invention is:

1. The film sealing mechanism cuts the plastic wrap in four different directions through a motor and a crank rocker mechanism. The film sealing device is not only easy to drive, but also very convenient to maintain. During the process of lifting the fresh-keeping box by the lifting cylinder, the fresh-keeping box contacts the fresh-keeping film and pulls the fresh-keeping film under the lifting of the lifting cylinder, so that the fresh-keeping film is pulled out from the new fresh-keeping film roll. When the film is pulled out from the new plastic wrap roll, the new plastic wrap roll drives the follower shaft to rotate, so that the follower shaft drives the limit plate to rotate, in order to prevent the plastic wrap from being pulled too tightly during the lifting process. When a break occurs, the plastic wrap will be pulled out for a section. When the plastic wrap is pulled out from one end, the telescopic rod will be reinserted into the limit hole of the limit plate, so that the follower shaft will stop rotating, which can prevent the plastic wrap from being pulled out too much and causing damage. The sealing film is not effective.

2. The worm drives the rotation of the gear ring, so that the big thorn claws protrude and connect with the small thorn claws, so that the whole worm wheel rotates. When the ordinary thorn wheel mechanism drives the inner ring to rotate under the force of the outer ring, the inner ring is required by the external force to rotate. When reversing, the inner ring cannot be reversed in the outer ring. The setting of the worm gear mechanism makes the outer ring, that is, the gear ring, drive the inner ring, that is, the rotating ring to rotate, and the retractable large claws are set so that the rotating ring can The reverse is carried out in the gear ring, so as to achieve the effect that the ordinary jingle mechanism cannot achieve.

3. When the packaged fresh-keeping box is taken away and the lifting cylinder returns to the original position again, because the lifting cylinder pulls the plastic wrap when lifting the fresh-keeping box, one end of the plastic wrap is left, and the traction motor is working. It will first roll up the excess plastic wrap at one end through the traction shaft, and then pull the new plastic wrap. Since the plastic wrap itself is sticky, the setting of the sleeve can prevent it from moving during the process of rolling up the excess plastic wrap. The shaft rotates with the traction motor to pull the plastic wrap, so as to prevent the plastic wrap from being stretched and causing the plastic wrap at the sheared part to be pulled off.

4. A single motor drives the crank rocker mechanism to move, and realizes the reciprocating motion of the cross-cutting plate and the longitudinal rod when the single motor rotates in one direction. The existing film sealing device needs at least three sets of motors to drive the film sealing mechanism to move at the same time. The reciprocating motion of the sealing film mechanism is realized by controlling the positive and negative rotation of the motor, which is not only complicated to control, but also high in cost. Easy maintenance.

Description of drawings

1 is a schematic diagram of the overall structure of a vegetable sealing device based on a crank rocker mechanism in the present invention;

Fig. 2 is a schematic diagram of the overall component installation structure of a vegetable sealing device based on a crank rocker mechanism according to the present invention;

Fig. 3 is a top view of a film sealing assembly of a vegetable sealing device based on a crank rocker mechanism according to the present invention;

Fig. 4 is a structural schematic diagram of an eccentric wheel of a vegetable sealing device based on a crank rocker mechanism according to the present invention;

5 is a schematic structural diagram of a traction assembly of a vegetable sealing device based on a crank-rocker mechanism according to the present invention;

Fig. 6 is a schematic diagram of a rotating shaft structure of a vegetable sealing device based on a crank rocker mechanism according to the present invention;

Fig. 7 is a schematic diagram of the thorn wheel structure of a vegetable sealing device based on the crank rocker mechanism of the present invention;

Fig. 8 is a schematic diagram of the natural state structure of the worm wheel of a vegetable sealing device based on the crank rocker mechanism of the present invention;

Fig. 9 is a structural schematic diagram of a vegetable sealing device based on a crank-rocker mechanism after compression of the worm wheel of the present invention;

Fig. 10 is a front view of a wheel housing of a vegetable sealing device based on a crank rocker mechanism according to the present invention;

Fig. 11 is a right sectional view of a wheel housing of a vegetable sealing device based on a crank-rocker mechanism according to the present invention.

The reference signs are as follows: 1. shell; 2. film sealing mechanism; 3. film pulling mechanism; 4. supporting cylinder; 1-1, vertical plate; 1-2, horizontal plate; 11, screw mandrel; 2-12, cross-cut plate; 2-13, longitudinal bar; 2-14, support plate; 2-15, longitudinal plate; 2-16, chute; 2-17, slide bar; 2- 18, collar; 2-19, extension rod; 2-191, extension connecting rod; 2-192, extension casing; 2-21, power machine; 2-22, rotating shaft; 2-23, eccentric wheel; 2- 24, crank; 2-25, rocker; 2-26, extension shell; 2-27, push plate; 2-28, air bag; 2-29, connecting rod; 3-3, stopper; 3-4, Jing wheel; 3-11, traction shaft; 3-12, traction motor; 3-13, gear transmission group; 3-14, shaft support plate; 3-15, worm; 3-21, follower shaft; 3-22 , worm gear; 3-23, limit plate; 3-24, sleeve; 3-25, driven plate; 3-26, reaction plate; 3-27, resistance plate; 3-221, wheel shell; 3-222 , gear ring; 3-223, rotating ring; 3-224, ring groove; 3-225, fixed ring; 3-226, push block; 3-227, baffle; 3-228, slider; 3-229, Big thorn claw; 3-230, small thorn claw; 3-31, stopper II.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment: As shown in Figure 1-11, a vegetable sealing device based on a crank rocker mechanism, the vegetable sealing device includes a casing 1, a sealing mechanism 2, and a film pulling mechanism 3, and the inside of the casing 1 is from left to right A film sealing mechanism 2 and a film pulling mechanism 3 are installed in sequence. The film pulling mechanism 3 uses a worm gear mechanism to unfold the fresh-keeping film. The film sealing mechanism 2 uses a crank rocker mechanism to seal the plastic wrap on the vegetable crisper. The crank rocker mechanism cuts the plastic wrap from four different directions.

The film sealing device also includes a control system, which detects the position of the fresh-keeping box and controls all electrical equipment in the device.

The inside of the casing 1 is also fixed with a supporting cylinder 4 by screws. The supporting cylinder 4 is located below the film pulling mechanism 3. The inside of the casing 1 is welded with a riser 1-1, and the riser 1-1 separates the casing 1 into a power space and a power space. In the sealing film space, two sets of horizontal plates 1-2 are fixed by screws sequentially from top to bottom in the power space, and the bearing plate 1-3 is fixed horizontally by screws in the sealing film space. The upper position is processed with a through groove, and the supporting cylinder 4 lifts the fresh-keeping box to the top of the film sealing mechanism 2 through the through groove.

The film sealing mechanism 2 includes a power component and a film sealing component 2-1, the power component is installed in the power space, the power component is rotationally connected with the sealing film component 2-1, and the sealing film component 2-1 is installed above the bearing plate 1-3 ;

The sealing film assembly 2-1 includes at least two sets of longitudinal rods 2-13, at least two sets of support plates 2-14, at least four sets of longitudinal plates 2-15, and the two sets of support plates 2-14 are fixed on the bearing plate 1-3 by screws. At least two groups of screw rods 2-11 are rotatably installed on the two groups of support plates 2-14, and the two groups of screw rods 2-11 are located on both sides of the through groove of the bearing plate 1-3, and the two groups of screw rods 2-11 are symmetrical Two groups of cross-cutting plates 2-12 are installed, and the thread directions at the lower ends of the two groups of cross-cutting plates 2-12 are opposite. 11 When reversing, the two groups of cross-cutting plates 2-12 are far away from each other. When the two groups of cross-cutting plates 2-12 are not working, they will not block the through groove. 11 for screw drive, the upper end faces of the two groups of cross-cutting plates 2-12 are symmetrically provided with chute 2-16, and a group of cross-cutting plates 2-12 close to the side of the vertical plate 1-1 is rotationally connected with the power assembly, Four groups of longitudinal plates 2-15 are welded in pairs on the vertical plates 1-1 and the inner wall of the shell 1 respectively. Slide bars 2-17 are welded between the two sets of longitudinal plates 2-15, and two sets of longitudinal bars 2-13 There are collars 2-18 welded to the two ends of each, the collars 2-18 are sleeved on the slide bar 2-17, two sets of rollers are symmetrically installed on the two sets of longitudinal bars 2-13, and the rollers are fixed on the longitudinal bars by screws 2-13, the rollers are located in the chute 2-16, and the rollers slide in the chute 2-16, and the two groups of longitudinal rods 2-13 are realized by the rollers and the chute 2-16 and the two groups of cross-cutting plates. 2-12 is rotationally connected, when two sets of cross-cutting plates 2-12 are close to each other, two sets of longitudinal rods 2-13 are close to each other, when two sets of cross-cutting plates 2-12 are far away from each other, two sets of longitudinal bars 2-13 are keep away.

The cross-cutting plate 2-12 near the vertical plate 1-1 side is fixed with an extension rod 2-19 by screws, and the connection between the extension rod 2-19 and the cross-cutting board 2-12 is sealed, and the extension rod 2-19 includes an extension The connecting rod 2-191 and the extension casing 2-192 sleeved on the extension connecting rod 2-191, one end of the extension connecting rod 2-191 is connected to the power assembly in rotation, and a push ring is welded on the extension connecting rod 2-191, And the push ring is located on the outside of the extension casing 2-192, and the other end of the extension connecting rod 2-191 is welded with an extension plate, which is located inside the extension casing 2-192 and is slidingly connected with the extension casing 2-192, and the extension plate Several groups of springs are installed between the extension casing 2-192, the extension plate is closely connected with the inner surface of the extension casing 2-192, and the extension plate cooperates with the extension casing 2-192 and the cross-cutting plate 2-12 An extension space is formed inside the extension casing 2-192, and an air hole is provided at one end of the extension casing 2-192 close to the cross-cutting plate 2-12, and the extension casing 2-192 is connected to the extension casing 2-26 through the air hole.

The power assembly includes a power machine 2-21, a rocker 2-25, and an extension shell 2-26. The power machine 2-21 is fixed on the inner lower surface of the shell 1 by screws, and the power machine 2-21 is a device for converting electrical energy and potential energy into mechanical energy. Such as motor and motor, in the present embodiment, the power machine is preferably a motor, and the following power machine 2-21 is collectively referred to as the motor 2-21, and the motor shaft of the motor 2-21 is connected to the rotating shaft 2-22 by a coupling, and the rotating shaft 2-21 22 is fixedly installed with crank 2-24 and eccentric wheel 2-23 sequentially from top to bottom. between them, and fixed with the vertical plate 1-1 by screws, the upper end surface of the crank 2-24 is provided with a fixed column, the rocker 2-25 is rotationally connected with the crank 2-24 through the fixed column, and the rocker 2-25 runs through the vertical plate 1-1, the other end of the rocking bar 2-25 is rotationally connected with the extension link 2-191.

The shell of the extension shell 2-26 is provided with a through groove, and the extension shell 2-26 is provided with a push plate 2-27 and an air bag 2-28 successively from left to right, and the glue between the push plate 2-27 and the air bag 2-28 Adhesive connection, the push plate 2-27 is symmetrically welded with a connecting rod 2-29 near the side of the eccentric wheel 2-23, the air bag 2-28 is provided with an air inlet hole and an air outlet hole, and a check valve is installed in the air inlet hole, The outside of the air outlet is connected with a pipeline, and the air bag 2-28 is connected with the extension casing 2-192 through the pipeline and the air hole. When the eccentric wheel 2-23 moves to the right, the eccentric wheel 2-23 is pushed through the connecting rod 2-29. The plate 2-27 squeezes the airbag 2-28, and when the eccentric wheel 2-23 moves to the left, the eccentric wheel 2-23 makes the pushing plate 2-27 stretch the airbag 2-28 through the connecting rod 2-29, When the push plate 2-27 squeezes the air bag 2-28, the air bag 2-28 transmits the gas to the extension casing 2-192 through the pipeline, and the upper and lower end surfaces of the eccentric wheel 2-23 are processed with chute, two groups The connecting rod 2-29 is L-shaped, and the L ends of two groups of connecting rods 2-29 are located in the chute, and the two groups of connecting rods 2-29 are rotationally connected with the eccentric wheel 2-23 through the chute, and the push plate 2-27 passes through the connecting rod. The rod 2-29 and the chute are rotatably connected to the eccentric wheel 2-23, and the extension shell 2-26 is rotatably connected to the eccentric wheel 2-23 through the push plate 2-27 and the chute.

For further optimization, the axis of symmetry of the crank 2-24 and the axis of symmetry of the eccentric wheel 2-23 are on the same vertical plane, and when the crank 2-24 moves the rocker 2-25 to the right for the maximum distance, the eccentric wheel 2-23 will not affect the airbag. The extruding degree of 2-28 is maximum, and motor 2-21 utilizes the crank rocker mechanism to realize unidirectional rotation to the cutting of four different directions of plastic wrap.

The film pulling mechanism 3 includes a traction assembly, a rotating shaft, and a stopper 3-3. The electric telescopic cylinder, the stopper 3-3 is collectively referred to as the electric telescopic cylinder 3-3 below, and the telescopic rod of the electric telescopic cylinder 3-3 is connected with the rotating shaft rotation.

The traction assembly includes a traction shaft 3-11, a traction motor 3-12, a gear transmission group 3-13, and at least four sets of shaft support plates 3-14. The traction motor 3-12 is a servo motor without self-locking, and four sets of shaft support plates Plates 3-14 are fixed in groups of two by two on the vertical plate 1-1 and the inner wall of the shell 1 respectively. The two sets of shaft support plates 3-14 on the vertical plate 1-1 are rotatably mounted with rotating shafts. On the inner wall of the shell 1 The two groups of shaft support plates 3-14 are rotated with a traction shaft 3-11, and the traction motor 3-12 is fixed on the inner wall of the casing 1 by screws, and the traction motor 3-12 is connected with the traction shaft 3-11 shaft, and the traction motor 3-12 The motor shaft of -12 is fixed with a helical gear by a screw, one end of the gear transmission group 3-13 is rotationally connected with the helical gear, and the other end of the gear transmission group 3-13 is fixedly equipped with a worm screw 3-15.

For further optimization, two sets of jingle wheels 3-4 are installed on the traction shaft 3-11, and a casing is installed on the outside of the jingle wheel 3-4, and another set of stopper II is fixed by screws on one side of the casing No. 3-31 is No. 3-31 of the electric telescopic cylinder II. Brake pads are fixed on the telescopic rod of No. 3-31 of the electric telescopic cylinder II. When the traction motor 3-12 does not work, the electric telescopic cylinder No. 3-31 works When the brake pads are in contact with the casing and prevent the rotation of the casing, when the traction motor 3-12 works and the electric telescopic cylinder II No. 3-31 does not work, the telescopic rod is retracted, the brake pads are separated from the casing, and the casing can Rotate under the drive of traction shaft 3-11.

For further optimization, the gear transmission group 3-13 includes several sets of support plates fixed on the shell 1, several sets of transmission shafts rotatably mounted on the supports, helical gears, worm gears and worms 3-15, and the helical gears are fixedly installed on the on the transmission shaft, and is connected with the helical gear transmission on the traction motor 3-12, and the worm gear is installed on different transmission shafts to carry out power transmission for the traction motor 3-12.

The rotating shaft includes a follower shaft 3-21 and a worm wheel 3-22, and the follower shaft 3-21 is sequentially rotated from left to right with a shaft support plate 3-14, a welding limit plate 3-23, and a sleeve 3 -24. The driven plate 3-25 is welded, the reaction plate 3-26 is slidably installed, the shaft support plate 3-14 is rotated, and several groups of springs are installed between the reaction plate 3-26 and the shaft support plate 3-14. The sleeve 3-24 is sleeved on the follower shaft 3-21, the driven plate 3-25 is located in the sleeve 3-24, and the outer surface of the side of the sleeve 3-24 close to the limit plate 3-23 is welded with Linkage plate, and the linkage plate is welded with a linkage half-bead on the end surface of the side away from the limit plate 3-23, and the inner surface of the end surface of the sleeve 3-24 close to the limit plate 3-23 is processed with gear teeth. Gear teeth are processed on the end surface of the plate 3-25 near the limit plate 3-23 side, the gear teeth on the sleeve 3-24 and the driven plate 3-25 can be engaged, and the outer surface of the sleeve 3-24 is provided with Screw threads, the inner surface of the worm wheel 3-22 is provided with threads, the worm wheel 3-22 is sleeved on the sleeve 3-24 and is connected to the sleeve 3-24 through threads, and the two sides of the worm wheel 3-22 are provided with resistance plates 3 -27, and the resistance plate 3-27 is fixed on the vertical plate 1-1 by screws, the upper end of the worm gear 3-22 is rotationally connected with the worm screw 3-15, and the limit plate 3-23 is provided with a limit hole, and the limit hole The aperture is the same as the diameter of the telescopic rod in the electric telescopic cylinder 3-3. When the traction motor 3-12 works and the electric telescopic cylinder 3-3 does not work, the telescopic rod is retracted into the electric telescopic cylinder 3-3, and the limit plate 3 -23 can freely rotate with the follower shaft 3-21. When the traction motor 3-12 is not working and the electric telescopic cylinder 3-3 is working, the telescopic rod stretches out and contacts the limit plate 3-23. When the limit plate When 3-23 rotates and makes the limit hole be located below the telescopic rod, the telescopic rod is inserted into the limit hole and limits the rotation of the limit plate 3-23, thereby limiting the rotation of the follower shaft 3-21.

The worm gear 3-22 includes two groups of wheel housings 3-221, gear ring 3-222, and rotating ring 3-223. The outer wall of the wheel housing 3-221 near the limit plate 3-23 is processed with bead grooves, and the position of the bead grooves Corresponding to the linkage half-beads, two sets of ring grooves 3-224 are processed on the opposite side end surfaces of the two sets of wheel shells 3-221, and the gear ring 3-222 and the rotating ring 3-223 are located in the two sets of ring grooves 3-224 respectively. Among them, the diameter of the rotating ring 3-223 is smaller than the diameter of the gear ring 3-222 and the rotating ring 3-223 is located in the gear ring 3-222, and the gear ring 3-222 and the rotating ring 3-223 are realized through the ring groove 3-224. Rotately connected with the wheel housing 3-221, the outer surface of the gear ring 3-222 is provided with gear teeth, the gear ring 3-222 is rotatably connected with the worm 3-15, the inner surface of the rotating ring 3-223 is provided with threads, and the rotating ring 3-223 -223 is rotationally connected with the sleeve 3-24, and the wheel housing 3-221 is welded with a fixed ring 3-225 between the gear ring 3-222 and the rotating ring 3-223.

The inner surface of the gear ring 3-222 is processed with several groups of push blocks 3-226, the inner wall of the wheel housing 3-221 is processed with chute, the position of the push block 3-226 corresponding to the chute is welded with pillars, and the pillars are located in the chute , the wheel housing 3-221 restricts the rotation of the gear ring 3-222 through the chute and the pillar, the fixed ring 3-225 is processed with several groups of through grooves, and the outer surface of the fixed ring 3-225 is welded with several groups of baffle plates 3- 227, several groups of baffle plates 3-227 are located on one side of several groups of through grooves, and several groups of slide blocks 3-228 are slidably installed between the gear ring 3-222 and the fixed ring 3-225, and the baffle plates 3-227 and the slide block 3-228 correspond one-to-one, a spring is arranged between the block 3-227 and the slide block 3-228, and the two ends of the spring are respectively connected with the stop block 3-227 and the slide block 3-228, several sets of slide blocks 3-228 The side that is in contact with the fixed ring 3-225 is rotated with a large thorn claw 3-229, and the slide block 3-228 is welded with a stopper on one side of the big thorn claw 3-229, and the stopper is connected to the big thorn claw 3-229. Rotation restriction, the rotating ring 3-223 is equipped with several groups of small thorn claws 3-230, several groups of large thorn claws 3-229 and several groups of small thorn claws 3-230 one by one. Correspondingly, several groups of large thorn claws 3-229 pass through the through groove and are rotatably connected with small thorn claws 3-230.

Working principle of the present invention:

Brand-new plastic wrap roll is installed on the rotating shaft, and empty plastic wrap roll is installed on the casing of traction shaft 3-11, and extracts a section from brand-new plastic wrap roll and is fixed on the empty plastic wrap roll.

When the traction motor 3-12 is not working and the electric telescopic cylinder II No. 3-31 is working, the brake pads are in contact with the housing and prevent the rotation of the housing. When the traction motor 3-12 is working and the electric telescopic cylinder II No. 3-31 is not During work, telescoping link is retracted, and brake block is disengaged from casing, and casing can rotate under the drive of traction shaft 3-11. At the same time, when the traction motor 3-12 drives the traction shaft 3-11 to rotate, the electric telescopic cylinder 3-3 will not work, and the telescopic rod is withdrawn from the limit hole, and the traction motor 3-12 drives the traction shaft 3-11 When rotating, the traction shaft 3-11 drives the empty plastic wrap to rotate through the casing, and the traction motor 3-12 drives the follower shaft 3-21 through the helical gear, the gear transmission group 3-13 and the worm wheel 3-22 to rotate. Rotate, by the rotation of follower shaft 3-21, brand-new cling film roll is started to rotate, and cling film rolls out between traction shaft 3-11 and the rotating shaft by the rotation of empty cling film roll and brand-new cling film roll.

When the gear transmission group 3-13 drives the worm wheel 3-22 to rotate, the transmission rod will drive the worm 3-15 to rotate, and when the worm 3-15 rotates, the gear ring 3-222 will rotate under the drive of the worm 3-15. Rotate in the shell 3-221, because there are resistance plates 3-27 on both sides of the wheel shell 3-221, the wheel shell 3-221 will be subjected to a certain rotation resistance, and the gear ring 3-222 is with the push block 3-226 in the When the wheel housing 3-221 rotates, the push block 3-226 will push the slide block 3-228 to compress the spring and make the big thorn claw 3-229 pass through the slot and contact the small thorn claw 3-230. After the small thorn claw 3-230 contacts the big thorn claw 3-229, the rotational power on the gear ring 3-222 will be transmitted to the rotating ring 3-223 by the small thorn claw 3-230 and the big thorn claw 3-229, When the rotating ring 3-223 drives the sleeve 3-24 to rotate, it will be subjected to the rotational resistance transmitted by the sleeve 3-24, and the rotating ring 3-223 will transmit the rotational resistance to the large thorn claw 3-229 through the small thorn claw 3-230 , and then transmitted to the wheel housing 3-221, thereby increasing the rotational resistance of the wheel housing 3-221, finally making the big thorn claw 3-229 fully extend out of the through groove under the drive of the slider 3-228 and connect with the small thorn Claw 3-230 full contact.

When the rotating ring 3-223 starts to rotate, the sleeve 3-24 moves to the left on the follower shaft 3-21 driven by the rotating ring 3-223, and squeezes the reaction plate 3-26 to make the reaction plate 3 -26 moves to the left on the follower shaft 3-21, and compresses the spring. When the sleeve 3-24 moves to the left end, and the linkage half ball is inserted into the bead groove, the sleeve 3-24 and the driven plate 3- When the gear teeth on the 25 can be engaged, the worm gear 3-22 realizes driving the follower shaft 3-21 to rotate through the sleeve 3-24.

When the traction motor 3-12 stops working, the slide block 3-228 pushes back the push block 3-226 under the push of the spring, and the push block 3-226 is driven by the push of the slide block 3-228 to drive the gear ring 3-222. Reverse, because the traction motor 3-12 does not have self-locking, when the gear ring 3-222 reverses, it can drive the worm 3-15 to reverse, so that the big thorn claw 3-229 is out of contact with the small thorn claw 3-230 And take back in the through groove, and then make rotating ring 3-223 can reverse in worm gear 3-22, simultaneously, electric telescopic cylinder 3-3 starts work and stretches out telescopic rod and contacts with limit plate 3-23.

Because the rotating ring 3-223 can be reversed, when the reaction plate 3-26 reversely pushes the sleeve 3-24 under the push of the spring, the sleeve 3-24 can move to the right on the follower shaft 3-21 Move, and make one end of the sleeve 3-24 move to a position in contact with the limit plate 3-23, so that the follower shaft 3-21 can rotate freely.

Put the fresh-keeping box with vegetables on the supporting cylinder 4, and the lifting cylinder 4 lifts the fresh-keeping box to the top of the longitudinal bar 2-13. Contact with the plastic wrap and pull the plastic wrap under the lifting of the lifting cylinder 4, so that the plastic wrap is pulled out from the new plastic wrap roll. The roll drives the follower shaft 3-21 to rotate, so that the follower shaft 3-21 drives the limit plate 3-23 to rotate. Pulled out a section, after plastic wrap is pulled out one end distance, telescoping rod reinserts in the spacing hole of spacing plate 3-23, makes follower shaft 3-21 stop rotating.

After the lifting cylinder 4 lifts the fresh-keeping box to the top of the vertical rod 2-13, the motor 2-21 drives the crank 2-24 and the eccentric wheel 2-23 to rotate through the rotating shaft 2-22, and the crank 2-24 drives the rocker The rod 2-25 rotates, the rocker 2-25 converts the circular motion into a constant motion and transmits the power to the extension connecting rod 2-191, and the extension connecting rod 2-191 pushes the cross-cutting plate 2 through the extension casing 2-192 -12 moves on screw mandrel 2-11, and at this moment, screw mandrel 2-11 carries out forward rotation, and two groups of cross-cutting plates 2-12 approach each other, and two groups of longitudinal rods 2-13 approach each other simultaneously.

When the crank 2-24 moves the extension rod 2-19 to the right for the maximum distance through the rocker 2-25, the eccentric wheel 2-23 squeezes the air bag 2-28 to the greatest extent, so that all the gas in the air bag 2-28 enters In the extension space, the air pressure in the extension space is increased, so that the extension casing 2-192 moves to the right on the extension connecting rod 2-191 again, and the cross-cutting plate 2-12 moves to the right again on the screw rod 2-11 Move one end distance, and then make two groups of longitudinal rods 2-13 close together and carry out longitudinal extrusion to the fresh-keeping film, make two groups of cross-cutting boards 2-12 push against each other and carry out transverse cutting on the fresh-keeping film.

When the packaged fresh-keeping box is taken away and the lifting cylinder 4 returns to the original position again, because the lifting cylinder 4 pulls the fresh-keeping film when lifting the fresh-keeping box, one end of the fresh-keeping film is added, and the traction motor 3-12 When working, the excess plastic wrap at one end will be rolled up by the traction shaft 3-11, and then the new plastic wrap is pulled. In the process of rolling up the excess plastic wrap, in order to prevent the follower shaft 3-21 from following the traction The motor 3-12 rotates together. In the process, the traction motor 3-12 will make the sleeve 3-24 move leftward on the follower shaft 3-21 through the worm gear 3-22. The barrel 3-24 just moves to the left end and engages with the follower shaft 3-21 gear.

It will be apparent to those skilled in the art that the invention is not limited to the details of the above-described exemplary embodiments, but that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Accordingly, the embodiments should be regarded in all points of view as exemplary and not restrictive, the scope of the invention being defined by the appended claims rather than the foregoing description, and it is therefore intended that the scope of the invention be defined by the appended claims rather than by the foregoing description. All changes within the meaning and range of equivalents of the elements are embraced in the present invention. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (1)

1. A vegetable sealing device based on a crank rocker mechanism, characterized in that: the vegetable sealing device comprises a casing (1), a sealing mechanism (2), a film pulling mechanism (3), and the casing (1) The film sealing mechanism (2) and the film pulling mechanism (3) are arranged in sequence from left to right inside. The film pulling mechanism (3) uses a worm gear mechanism to unfold the plastic wrap, and the film sealing mechanism (2) uses a crank to shake The rod mechanism makes the fresh-keeping film encapsulated on the vegetable fresh-keeping box, and the film-sealing mechanism (2) uses the crank rocker mechanism to cut the fresh-keeping film from four different directions; The inside of the housing (1) is also provided with a supporting cylinder (4), the supporting cylinder (4) is located below the film pulling mechanism (3), and the inside of the housing (1) is provided with a vertical plate (1- 1), the vertical plate (1-1) divides the shell (1) into a power space and a sealing film space, and two sets of horizontal plates (1-2) are sequentially arranged in the power space from top to bottom, and the A bearing plate (1-3) is horizontally arranged in the film sealing space; the film sealing mechanism (2) includes a power assembly and a film sealing assembly (2-1), and the power assembly is arranged in the power space, and the power assembly and the sealing film The membrane assembly (2-1) is rotatably connected, and the sealing membrane assembly (2-1) is arranged above the carrier plate (1-3); the film pulling mechanism (3) includes a traction assembly, a rotating shaft, a stopper ( 3-3), the rotating shaft is rotationally connected with the traction assembly, and the rotating shaft is rotationally connected with the stopper (3-3); The power assembly includes a power machine (2-21), a rocker (2-25), and an extension shell (2-26). The power machine (2-21) is arranged on the inner lower end surface of the casing (1), and the power machine (2 -21) is provided with a rotating shaft (2-22), and the rotating shaft (2-22) is sequentially provided with a crank (2-24) and an eccentric wheel (2-23) from top to bottom, and the eccentric wheel (2-23) is located between the two sets of horizontal plates (1-2), and the extension shell (2-26) is located between the two sets of horizontal plates (1-2) and fixed to the vertical plate (1-1), The eccentric wheel (2-23) is rotatably connected with the extension shell (2-26), the crank (2-24) is rotatably connected with the rocker (2-25), and the other part of the rocker (2-25) One end is rotationally connected with the sealing film assembly (2-1); The traction assembly includes a traction shaft (3-11), a traction motor (3-12), a gear transmission group (3-13), at least four sets of shaft support plates (3-14), and four sets of shaft support plates ( 3-14) Two groups are arranged on the vertical plate (1-1) and the inner wall of the shell (1) respectively, and the two sets of shaft support plates (3-14) on the vertical plate (1-1) are arranged on the There is a rotating shaft, and the two sets of shaft support plates (3-14) on the inner wall of the housing (1) are provided with a traction shaft (3-11), and the traction motor (3-12) is arranged on the inner wall of the housing (1) , the traction motor (3-12) is axially connected with the traction shaft (3-11), the traction motor (3-12) is provided with a helical gear, and one end of the gear transmission group (3-13) is rotationally connected with the helical gear, The other end of the gear transmission group (3-13) is provided with a worm (3-15), and the worm (3-15) is rotatably connected with the rotating shaft; The casing of the extension shell (2-26) is provided with a through groove, and a push plate (2-27) and an air bag (2-28) are sequentially arranged in the extension shell (2-26) from left to right. The side of the plate (2-27) close to the eccentric wheel (2-23) is symmetrically provided with a connecting rod (2-29), and the upper and lower end surfaces of the eccentric wheel (2-23) are provided with chute, the two groups described The connecting rods (2-29) are L-shaped, the L ends of the two sets of connecting rods (2-29) are located in the chute, and the two sets of connecting rods (2-29) are rotationally connected with the eccentric wheel (2-23) through the chute , the push plate (2-27) is rotationally connected with the eccentric wheel (2-23) through the connecting rod (2-29) and the chute, and the extension shell (2-26) is connected through the push plate (2-27) And the chute realizes the rotational connection with the eccentric wheel (2-23); The sealing film assembly (2-1) includes at least two sets of longitudinal rods (2-13), at least two sets of support plates (2-14), at least four sets of longitudinal plates (2-15), and two sets of support plates (2-14) is provided with at least two sets of screw mandrels (2-11), and two sets of cross-cut plates (2-12) are symmetrically arranged on the two sets of screw mandrels (2-11). The upper end faces of the cutting plates (2-12) are all symmetrically provided with chute (2-16), and a group of cross-cutting plates (2-12) and rocking bars (2-25) near the vertical plate (1-1) side ) rotation connection, the four groups of longitudinal plates (2-15) are arranged in pairs of two groups and respectively arranged on the vertical plate (1-1) and the inner wall of the shell (1), and the two groups of longitudinal plates (2-15) A sliding rod (2-17) is arranged between them, and a collar (2-18) is arranged at both ends of the two sets of longitudinal rods (2-13), and the collar (2-18) is sleeved on the sliding rod (2-17), two groups of rollers are symmetrically arranged on the longitudinal rods (2-13) of the two groups, and the rollers are divided into and located in the chute (2-16), and the rollers and the chute (2-16 ) is rotationally connected, and the longitudinal rods (2-13) of the two groups are rotationally connected with the cross-cutting plates (2-12) of the two groups through rollers and slide grooves (2-16); The rotating shaft includes a follower shaft (3-21) and a worm wheel (3-22), and the follower shaft (3-21) is sequentially provided with a shaft support plate (3-14) and a limit plate from left to right (3-23), sleeve (3-24), driven plate (3-25), reaction plate (3-26), shaft support plate (3-14), the sleeve (3-24) covers Set on the follower shaft (3-21), the follower plate (3-25) is located in the sleeve (3-24), and the worm wheel (3-22) is sleeved in the sleeve (3-24) and connected with the sleeve (3-24) in rotation, the two sides of the worm wheel (3-22) are provided with resistance plates (3-27), and the worm wheel (3-22) is connected in rotation with the worm (3-15). The limiting plate (3-23) is rotationally connected with the stopper (3-3); The worm wheel (3-22) includes two groups of wheel housings (3-221), gear rings (3-222), and rotating rings (3-223), and the opposite side end surfaces of the two groups of wheel housings (3-221) Two sets of ring grooves (3-224) are arranged on the top, the gear ring (3-222) and the rotating ring (3-223) are respectively located in the two sets of ring grooves (3-224), and the rotating ring (3-223) has a diameter smaller than that of the gear ring (3-222) and the rotating ring (3-223) is located in the gear ring (3-222), the gear ring (3-222) and the rotating ring (3- 223) are rotatably connected with the wheel housing (3-221), the gear ring (3-222) is rotatably connected with the worm (3-15), and the rotatably ring (3-223) is connected with the sleeve (3-24) Rotationally connected, the wheel housing (3-221) is provided with a fixed ring (3-225) between the gear ring (3-222) and the rotating ring (3-223).

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