CN112874851B - Vegetable film sealing device based on crank rocker mechanism - Google Patents

Abstract

The invention discloses a vegetable film sealing device based on a crank and rocker mechanism, which comprises a shell, a film sealing mechanism and a film pulling mechanism, wherein the film sealing mechanism and the film pulling mechanism are sequentially arranged in the shell from left to right, the film pulling mechanism utilizes a worm and gear mechanism to unfold a preservative film, the film sealing mechanism utilizes the crank and rocker mechanism to seal the preservative film on a vegetable preservative box, and the film sealing mechanism utilizes the crank and rocker mechanism to cut the preservative film from four different directions.

Description

Vegetable film sealing device based on crank rocker mechanism

This application is a divisional application, original application number: 202010458227.6, filing date: 26/05/2020, the name of the invention is: a vegetable film sealing device based on a crank rocker mechanism.

Technical Field

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

Background

With the development of science and technology and the improvement of living standard, people not only pay more attention to the quality of commodities such as vegetables and fruits, but also continuously improve the packaging requirements of the commodities, and particularly are particularly loved for packaging of breathable and fresh-keeping preservative films. However, most of the current preservative film packaging for vegetables and fruits depends on manual operation, the average efficiency is low, and the yield of the vegetables and fruits is high, so that the time required for packaging is shortened as much as possible on the premise of ensuring the freshness of the vegetables and fruits as much as possible, thereby causing heavy work of workers, easily causing people to feel fatigue, and being difficult to maintain high efficiency for a long time, and therefore, the research and development work of the automatic preservative film packaging equipment for the vegetables and fruits is very necessary. In the whole packaging process of the vegetable and fruit preservative film, the packaging of the finished vegetables and fruits is an important step. After putting into the tray to the vegetables and fruits that will pack, put its assigned position to plastic wrap packing plant, the device can automatic go up the membrane, then the parcel is accomplished to the tray that the propelling movement contained the fruits and vegetables, cuts the plastic wrap through cutting the membrane part at last, accomplishes and seals membrane and packing to the efficiency of carrying out the plastic wrap packing to agricultural products such as vegetables and fruits has been improved greatly.

The existing film sealing device can only extrude and cut the preservative film from 3 directions, and the film sealing device controls 3 mechanisms to move towards different directions when working, the film sealing device respectively drives the 3 mechanisms to work, the driving device is certainly complex because of installation of a plurality of drives, and the movement in the 3 directions is not unrelated, in the cutting process, the movement process needs to be controlled to ensure that a longitudinal cutting component and a transverse cutting component simultaneously start to move, and simultaneously stop after reaching a proper position, therefore, the device needs to be improved to simplify the driving to avoid the complex driving, and the control during the working is simple as possible or the control is realized by using machinery.

In order to solve the problems of complex driving and high cost of the film sealing device, the device utilizes a crank rocker mechanism and a roller chute linkage mechanism to design so as to simplify the driving, and the device is also provided with a sleeve to solve the problems in order to prevent the preservative film of the cut part from being broken when being pulled.

Disclosure of Invention

The invention aims to provide a vegetable film sealing device based on a crank and rocker mechanism, which aims to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a vegetables seal membrane device based on crank rocker mechanism, this vegetables seal membrane device include the shell, seal membrane mechanism, draw membrane mechanism, turn right from a left side and have set gradually and seal membrane mechanism, draw membrane mechanism and utilize worm gear mechanism to make the plastic wrap expand, seal membrane mechanism and utilize crank rocker mechanism to make the plastic wrap encapsulation on vegetable fresh-keeping box, seal membrane mechanism and utilize crank rocker mechanism to cut the plastic wrap from four not equidirectional. The film sealing mechanism realizes the cutting of the preservative film in four different directions through a motor and a crank rocker mechanism, and the film sealing device not only has simple driving, but also is very convenient to maintain.

As a preferred technical scheme, a supporting and feeding cylinder is further arranged in the shell and located below the film pulling mechanism, a vertical plate is arranged in the shell and divides the shell into a power space and a film sealing space, two groups of transverse plates are sequentially arranged in the power space from top to bottom, and a bearing plate is horizontally arranged in the film sealing space; the film sealing mechanism comprises a power assembly and a film sealing assembly, the power assembly is arranged in the power space and is rotationally connected with the film sealing assembly, and the film sealing assembly is arranged above the bearing plate; the film drawing mechanism comprises a traction assembly, a rotating shaft and a stopper, wherein the rotating shaft is rotatably connected with the traction assembly, and the rotating shaft is rotatably connected with the stopper. The support air feed cylinder lifts the preservation box that has vegetables, make preservation box and plastic wrap contact, the riser separates the shell inner space, the diaphragm provides the support for the installation of extending the shell, the loading board provides the support for the installation of sealing the membrane subassembly, power component provides a membrane power for sealing the membrane subassembly, seal the membrane subassembly and cut the plastic wrap from the direction of four differences, it stretches out to pull the subassembly to roll up the plastic wrap and pulls, the pivot provides the support for the installation of plastic wrap book, the rotation of resistance to rotor countershaft restricts.

According to a preferable technical scheme, the power assembly comprises a power machine, a rocker and an extension shell, the power machine is arranged on the lower end face of the inner portion of the shell, a rotating shaft is arranged on the power machine, a crank and an eccentric wheel are sequentially arranged on the rotating shaft from top to bottom, the eccentric wheel is located between two groups of transverse plates, the extension shell is located between the two groups of transverse plates and fixed with the vertical plate, the eccentric wheel is rotatably connected with the extension shell, the crank is rotatably connected with the rocker, and the other end of the rocker is rotatably connected with the film sealing assembly. The power machine provides power for the rotation of the crank and the eccentric wheel, the power of the power machine is transmitted by the rotating shaft, the crank drives the rocker to rotate, the rocker converts the circular motion into linear motion and drives the membrane sealing assembly to move, the eccentric wheel extrudes the air bag in the extension shell, and the extension shell provides an installation space for the air bag.

As preferred technical scheme, it leads to the groove to extend to be provided with on the shell casing, turns right from a left side and has set gradually slurcam, gasbag in extending the shell, the slurcam is close to one side symmetry of eccentric wheel and is provided with the connecting rod, the upper and lower terminal surface of eccentric wheel all is provided with the spout, and is two sets of the connecting rod is the L type, and the L end of two sets of connecting rods is located the spout, and two sets of connecting rods pass through the spout to be connected with the eccentric wheel rotation, the slurcam passes through connecting rod and spout realization and is connected with the eccentric wheel rotation, it is connected with the eccentric wheel rotation to extend the shell through slurcam and spout realization. The through groove provides a channel for the eccentric wheel to penetrate through the extension shell, the air bag is extruded when the pushing plate is stressed to move towards the interior of the extension shell, air is filled into the extension rod after the air bag is extruded, and the connecting rod is connected with the pushing plate and the eccentric wheel.

As preferred technical scheme, it includes two sets of vertical poles at least, two sets of backup pads, four group at least vertical boards, and is two sets of to seal the membrane subassembly be provided with two sets of at least lead screws in the backup pad, two sets of the symmetry is provided with two sets of crosscut boards on the lead screw, and is two sets of the equal symmetry of up end of crosscut board is provided with the spout, and a set of crosscut board that is close to riser one side rotates with the rocker to be connected, four groups two liang of vertical boards are a set of and set up respectively on riser and shell inner wall, and are two sets of be provided with the slide bar between the vertical board, two sets of the both ends of vertical pole all are provided with the lantern ring, the lantern ring cover is established on the slide bar, and is two sets of all the symmetry is provided with two sets of gyro wheels on the vertical pole, the gyro wheel divide into to be located the spout, and the gyro wheel rotates with the spout to be connected, two sets of vertical pole passes through gyro wheel and spout realization and two sets of crosscut board rotates to be connected. The vertical plate provides the support for the installation of slide bar, and vertical bar slidable mounting is on the slide bar, and the vertical bar carries out vertical extrusion to the plastic wrap, and the backup pad provides the support for the installation of lead screw, and the lead screw provides the support for the installation of crosscut board, and two sets of crosscut boards mutually support and carry out horizontal extrusion and cutting to the plastic wrap, and the gyro wheel removes and drives the vertical bar and move on the slide bar in the spout.

As preferred technical scheme, be close to riser one side be provided with the extension rod on the crosscut board, the extension rod is established the extension cover shell on the extension connecting rod including extending connecting rod and cover, the one end and the rocker of extending the connecting rod rotate to be connected, and the other end of extending the connecting rod is provided with the extension board, the extension board is located inside and with extension cover shell sliding connection of extension cover shell, extends the board and extends the internal surface zonulae occludens of cover shell, the one end that the extension cover shell is close to the crosscut board is provided with the air vent, extends the cover shell and extends shell pipeline and be connected. Extension rod extension transverse cutting board moving distance on the lead screw simultaneously the extension rod for transverse cutting board's removal provides power, extends the connecting rod and forms complete extension rod with extending the cover shell and mutually support, extends the cover shell inner space and forms the extension space under the partition of extension board, extends the inside gasbag of shell and is transmitted gas to in the extension space after being compressed.

As preferred technical scheme, the subassembly that draws is including drawing axle, traction motor, gear drive group, four group at least axle backup pads, four groups two liang of a set of axle backup pads and setting respectively on riser and shell inner wall, two sets of on the riser be provided with the pivot in the axle backup pad, on the shell inner wall two sets of be provided with the axle that draws in the axle backup pad, traction motor sets up on the shell inner wall, and traction motor and drawing axle hub connection are provided with the helical gear on the traction motor, the one end and the helical gear of gear drive group rotate to be connected, and the other end of gear drive group is provided with the worm, the worm rotates with the pivot to be connected. The traction shaft is used for unfolding and drawing the preservative film roll, the traction motor provides power for the rotation of the traction shaft, the gear transmission set transmits the power of the traction motor to the rotating shaft, the supporting plate provides support for the installation of the rotating shaft and the traction shaft, the helical gear is rotationally connected with the gear transmission set and transmits the power on the traction motor to the gear transmission set, and the worm is rotationally connected with the rotating shaft and transmits the rotational power to the shaft.

As a preferred technical scheme, the pivot includes follower shaft, worm wheel, turn right from a left side and have set gradually axle backup pad, limiting plate, sleeve, driven plate, reaction plate, axle supporting plate on the follower shaft, the sleeve cover is established on the follower shaft, the driven plate is located the sleeve, the worm wheel cover is established on the sleeve and is connected with the sleeve rotation, the both sides of worm wheel are provided with the resistance board, and the worm wheel rotates with the worm to be connected, the limiting plate rotates with the stopper and is connected. The axle backup pad provides the installation support for the follower shaft, the follower shaft drives the plastic wrap book and rotates, the worm wheel rotates with the worm to be connected and will rotate power transmission to the sleeve, the limiting plate is injectd the sleeve in epaxial position of follow-up, simultaneously injectd the rotation of follow-up shaft under the certain condition, the sleeve moves left and drives the follow-up shaft and rotate on the follow-up shaft under the drive of worm wheel, the driven plate welds on the follow-up shaft, when the sleeve removes the leftmost end, the sleeve carries out gear drive and drives the follow-up shaft and rotate with the driven plate, the reverse plate moves left under telescopic promotion, be provided with a plurality of groups spring between reverse plate and the axle backup plate, compress the spring when the reverse plate moves left, the resistance plate is injectd the position of worm wheel, increase certain rotational resistance to the rotation of worm wheel simultaneously, the stopper realizes injectting the rotation of follow-up shaft through the limiting plate.

As preferred technical scheme, the worm wheel includes two sets of wheel shells, ring gear, swivel becket, and is two sets of all be provided with two sets of annulars on the relative side end face of wheel shell, ring gear and swivel becket are located two sets of respectively in the annular, the diameter of swivel becket is less than ring gear's diameter and swivel becket and is located the ring gear, ring gear and swivel becket all rotate with the wheel shell and are connected, the ring gear rotates with the worm to be connected, the swivel becket rotates with the sleeve to be connected, the wheel shell is provided with solid fixed ring between ring gear and swivel becket. The wheel shell provides the support for the installation of ring gear, swivel ring, and the ring gear rotates with the worm to be connected, and solid fixed ring is integrative with the wheel shell, and the swivel ring rotates with the sleeve to be connected, and the ring gear will rotate power transmission to the set casing on the wheel shell promptly, and the wheel shell drives the swivel ring and rotates.

As preferred technical scheme, the surface of ring gear is provided with the teeth of a cogwheel, and the internal surface of ring gear is provided with a plurality of groups ejector pad, gu fixed ring is fixed with two sets of wheel shells, gu be provided with a plurality of groups on the fixed ring and lead to the groove, and gu fixed ring's surface is provided with a plurality of groups baffle, a plurality of groups the baffle is located one side that a plurality of groups led to the groove, be provided with a plurality of groups slider between ring gear and the fixed ring, baffle and slider one-to-one are provided with the spring between baffle and the slider, a plurality of groups the slider is provided with big vitex with one side of solid fixed ring contact, the swivel becket is provided with a plurality of groups of small vitex, a plurality of groups big vitex and a plurality of groups of small vitex one-to-ones, and a plurality of groups big vitex passes logical groove and rotates with small vitex to be connected. The push block pushes the slide block, so that the large claw on the slide block extends out of the through groove and is connected with the small claw, the large claw and the small claw are matched with each other to transmit power to the rotating ring, the spring provides reverse thrust for the slide block, and the slide block returns to the original position, so that the large claw retracts into the through groove.

Compared with the prior art, the invention has the beneficial effects that:

1. the film sealing mechanism realizes cutting of the preservative film in four different directions through a motor and a crank rocker mechanism, and the film sealing device is simple in driving and very convenient to maintain. In-process that the cylinder was carried out the lift to the preservation box in the support, preservation box and plastic wrap contact and pull the plastic wrap under the support of carrying the cylinder in the support, make the plastic wrap roll up from brand-new plastic wrap and pulled out, when the plastic wrap was rolled up from brand-new plastic wrap and is pulled out, brand-new plastic wrap is rolled up and is driven the follower shaft and rotate, thereby make the follower shaft drive the limiting plate and rotate, take place to split in order to prevent that the plastic wrap from being drawn too tightly at the in-process of lifting, the plastic wrap can be pulled out one section, after the plastic wrap is pulled out one end distance, the telescopic link reinserts in the spacing downthehole of limiting plate, make the follower shaft stall, can prevent that the plastic wrap from pulling out too much and causing the sealed membrane effect not good.

2. The worm drives the rotation of ring gear, make big pawl stretch out and be connected with little pawl, make whole worm wheel rotate, ordinary wheel mechanism drives the inner circle when the outer lane atress rotates, the inner circle is when receiving external force and need reversing, the inner circle can't reverse in the outer lane, this worm wheel mechanism's setting, when making the outer lane be ring gear drive inner circle promptly the rotating ring rotate, through the big pawl setting that can stretch out and draw back, make the rotating ring can reverse in the ring gear, thereby reach the effect that ordinary wheel mechanism can not reach.

3. Take away when the crisper that encapsulates, ask the air feed cylinder to get back to original position once more after, because ask the air feed cylinder to drag the plastic wrap when lifting the crisper, make the plastic wrap go out one end more, traction motor can roll up unnecessary one end plastic wrap through traction shaft earlier at the during operation, then dragging new plastic wrap, because plastic wrap self has viscidity, through telescopic setting, can prevent to roll up unnecessary plastic wrap in-process follow-up shaft and rotate along with traction motor and drag the plastic wrap together, avoid the plastic wrap taut and cause shear part's plastic wrap to stretch out.

4. Drive crank rocker mechanism through single motor and move, the reciprocating motion who drives crosscut board and vertical pole when realizing single motor unidirectional rotating, present membrane device that seals needs three group at least motors to drive simultaneously and seals membrane mechanism and move, and realize the reciprocating motion who seals membrane mechanism through the positive and negative rotation of control motor, not only control is complicated, and is with high costs, it only needs a motor to realize reciprocating motion to seal membrane mechanism in this device, not only control is simple, and is with low costs, also convenient maintenance.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a vegetable film sealing device based on a crank and rocker mechanism of the invention;

FIG. 2 is a schematic view of the mounting structure of the integral components of the vegetable film sealing device based on the crank and rocker mechanism of the present invention;

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

FIG. 4 is a schematic structural diagram of an eccentric wheel of the vegetable film sealing device based on a crank and rocker mechanism of the invention;

FIG. 5 is a schematic structural diagram of a traction assembly of the vegetable film sealing device based on a crank and rocker mechanism of the invention;

FIG. 6 is a schematic view of a rotating shaft structure of a vegetable film sealing device based on a crank and rocker mechanism according to the present invention;

FIG. 7 is a schematic view of a chaste wheel structure of a vegetable film sealing device based on a crank and rocker mechanism;

FIG. 8 is a schematic diagram of a worm wheel natural state structure of a vegetable film sealing device based on a crank and rocker mechanism;

FIG. 9 is a schematic structural diagram of a vegetable film sealing device based on a crank and rocker mechanism after worm wheel compression;

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

FIG. 11 is a right side sectional view of a wheel housing of the vegetable film sealing device based on a crank and rocker mechanism.

The reference numbers are as follows: 1. a housing; 2. a film sealing mechanism; 3. a film pulling mechanism; 4. a supporting and conveying cylinder; 1-1, a vertical plate; 1-2, a transverse plate; 1-3, bearing plate; 2-11, a screw rod; 2-12, a transverse cutting plate; 2-13, a longitudinal rod; 2-14, a support plate; 2-15, longitudinal plates; 2-16, a chute; 2-17, a slide bar; 2-18, a collar; 2-19, an extension rod; 2-191, an extension link; 2-192, an extension sleeve; 2-21, a power machine; 2-22, a rotating shaft; 2-23, eccentric wheel; 2-24, crank; 2-25, a rocker; 2-26, an extension shell; 2-27, a push plate; 2-28, air bag; 2-29, connecting rod; 3-3, a stopper; 3-4, chaste tree roots; 3-11, a traction shaft; 3-12, a traction motor; 3-13, a gear transmission group; 3-14, a shaft support plate; 3-15, worm; 3-21, a follow-up shaft; 3-22, a worm gear; 3-23, a limiting plate; 3-24, sleeve; 3-25, 7CN111605751A7 plate on page 4/9 of the driven instruction; 3-26, a reaction plate; 3-27, a resistance plate; 3-221, wheel shell; 3-222, gear ring; 3-223, a rotating ring; 3-224, ring groove; 3-225, a fixing ring; 3-226, a push block; 3-227, a baffle; 3-228, a slider; 3-229, chaste tree claw; 3-230, small chaste tree claw; 3-31 and a stopper II.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

The embodiment is as follows: as shown in fig. 1-11, a vegetable film sealing device based on a crank and rocker mechanism comprises a shell 1, a film sealing mechanism 2 and a film pulling mechanism 3, wherein the film sealing mechanism 2 and the film pulling mechanism 3 are sequentially installed inside the shell 1 from left to right, the film pulling mechanism 3 utilizes a worm and gear mechanism to unfold a preservative film, the film sealing mechanism 2 utilizes the crank and rocker mechanism to seal the preservative film on a vegetable preservation box, and the film sealing mechanism 2 utilizes the crank and rocker mechanism to cut the preservative film from four different directions.

The film sealing device also comprises a control system which detects the position of the preservation box and controls all electrical equipment in the device.

The interior of the shell 1 is further fixed with a supporting air cylinder 4 through screws, the supporting air cylinder 4 is located below the film drawing mechanism 3, a vertical plate 1-1 is welded in the shell 1, the shell 1 is divided into a power space and a film sealing space by the vertical plate 1-1, two groups of transverse plates 1-2 are sequentially fixed in the power space through the screws from top to bottom, a bearing plate 1-3 is horizontally fixed in the film sealing space through the screws, a through groove is processed in the position, right above the supporting air cylinder 4, of the bearing plate 1-3, and the freshness preservation box is lifted to the position above the film sealing mechanism 2 through the through groove by the supporting air cylinder 4.

The film sealing mechanism 2 comprises a power assembly and a film sealing assembly 2-1, the power assembly is arranged in the power space, the power assembly is rotationally connected with the film sealing assembly 2-1, and the film sealing assembly 2-1 is arranged above the bearing plate 1-3;

the film sealing assembly 2-1 comprises at least two groups of longitudinal rods 2-13, at least two groups of supporting plates 2-14 and at least four groups of longitudinal plates 2-15, the two groups of supporting plates 2-14 are fixed on a bearing plate 1-3 through screws, at least two groups of screw rods 2-11 are rotatably arranged on the two groups of supporting plates 2-14, the two groups of screw rods 2-11 are positioned at two sides of a through groove of the bearing plate 1-3, two groups of transverse plates 2-12 are symmetrically arranged on the two groups of screw rods 2-11, the thread directions of the lower ends of the two groups of transverse plates 2-12 are opposite, the two groups of transverse plates 2-12 are close to each other when the screw rods 2-11 rotate forwards, the two groups of transverse plates 2-12 are far away from each other when the screw rods 2-11 rotate backwards, the two groups of transverse plates 2-12 cannot block the through groove when not working, the lower ends of the transverse plates 2-12 are in screw rod transmission with the screw rods 2-11, the upper end surfaces of two groups of transverse cutting plates 2-12 are symmetrically provided with sliding grooves 2-16, one group of transverse cutting plates 2-12 close to one side of a vertical plate 1-1 is rotatably connected with a power assembly, two groups of four groups of longitudinal plates 2-15 are welded on the vertical plate 1-1 and the inner wall of a shell 1 respectively, a sliding rod 2-17 is welded between the two groups of longitudinal plates 2-15, two ends of two groups of longitudinal rods 2-13 are welded with lantern rings 2-18, the lantern rings 2-18 are sleeved on the sliding rods 2-17, two groups of longitudinal rods 2-13 are symmetrically provided with two groups of rollers, the rollers are fixed on the longitudinal rods 2-13 through screws, the rollers are located in the sliding grooves 2-16 and slide in the sliding grooves 2-16, and the two groups of longitudinal rods 2-13 are rotated with the two groups of transverse cutting plates 2-12 through the rollers and the sliding grooves 2-16 And in dynamic connection, when the two groups of transverse cutting plates 2-12 are close to each other, the two groups of longitudinal rods 2-13 are close to each other, and when the two groups of transverse cutting plates 2-12 are far away from each other, the two groups of longitudinal rods 2-13 are far away from each other.

An extension rod 2-19 is fixed on a transverse cutting plate 2-12 close to one side of a vertical plate 1-1 through a screw, the connection position of the extension rod 2-19 and the transverse cutting plate 2-12 is sealed, the extension rod 2-19 comprises an extension connecting rod 2-191 and an extension casing 2-192 sleeved on the extension connecting rod 2-191, one end of the extension connecting rod 2-191 is rotatably connected with a power assembly, a push ring is welded on the extension connecting rod 2-191 and is positioned on the outer side of the extension casing 2-192, an extension plate is welded at the other end of the extension connecting rod 2-191 and is positioned in the extension casing 2-192 and is in sliding connection with the extension casing 2-192, a plurality of groups of springs are arranged between the extension plate and the extension casing 2-192, the extension plate is tightly connected with the inner surface of the extension casing 2-192, the extension plate, the extension casing 2-192 and the transverse cutting plate 2-12 are mutually matched with each other to form an extension space in the extension casing 2-192, a vent hole is arranged at one end of the extension casing 2-192 close to the transverse cutting plate 2-12, and the extension casing 2-192 is connected with the extension casing 2-26 through a vent hole.

The power assembly comprises a power machine 2-21, a rocker 2-25 and an extension shell 2-26, wherein the power machine 2-21 is fixed on the lower end face of the inner part of the shell 1 through screws, the power machine 2-21 is a device for converting electric energy and potential energy into mechanical energy, such as a motor and a motor, the power machine 2-21 is preferably a motor in the embodiment, the power machine 2-21 is generally called as the motor 2-21, a motor shaft of the motor 2-21 is connected with a rotating shaft 2-22 through a coupler, a crank 2-24 and an eccentric wheel 2-23 are fixedly arranged on the rotating shaft 2-22 from top to bottom in sequence, the eccentric wheel 2-23 is positioned between two groups of transverse plates 1-2, the extension shell 2-26 is positioned between the two groups of transverse plates 1-2 and is fixed with a vertical plate 1-1 through screws, the upper end face of the crank 2-24 is provided with a fixing column, the rocker 2-25 is rotatably connected with the crank 2-24 through the fixing column, the rocker 2-25 penetrates through the vertical plate 1, and the other end of the rocker 2-25 is rotatably connected with an extension connecting rod 2-191.

The extension shell 2-26 is provided with a through groove on the shell, the extension shell 2-26 is internally provided with a push plate 2-27 and an air bag 2-28 from left to right in sequence, the push plate 2-27 and the air bag 2-28 are connected by gluing, one side of the push plate 2-27 close to an eccentric wheel 2-23 is symmetrically welded with a connecting rod 2-29, the air bag 2-28 is provided with an air inlet hole and an air outlet hole, a one-way valve is arranged in the air inlet hole, the outer side of the air outlet hole is connected with a pipeline, the air bag 2-28 is connected with the extension shell 2-192 through the pipeline and the air hole, when the eccentric wheel 2-23 moves to the right, the eccentric wheel 2-23 enables the push plate 2-27 to extrude the air bag 2-28 through the connecting rod 2-29, when the eccentric wheel 2-23 moves to the left, the eccentric wheel 2-23 enables the push plate 2-27 to stretch the air bag 2-28 through the connecting rod 2-29, when the eccentric wheel 2-27 extrudes the air bag 2-28, the air bag 2-28 transmits gas into the extension shell 2-192 through the pipeline, the upper end face and the eccentric wheel 2-23 are connected with the connecting rod 2-29, the connecting rod 23, the connecting groove, the connecting rod 2-23 is connected with the eccentric wheel, and the connecting rod 2-23, and the connecting rod 2-23, the connecting rod 23 is connected with the eccentric wheel, and the connecting rod 2-23, and the connecting groove, and the connecting rod 2-23, and the connecting rod.

Further optimization, the symmetrical axis of the crank 2-24 and the symmetrical axis of the eccentric wheel 2-23 are on the same vertical plane, when the crank 2-24 enables the rocker 2-25 to move rightwards for the maximum distance, the eccentric wheel 2-23 extrudes the air bag 2-28 to the maximum extent, and the motor 2-21 utilizes a crank rocker mechanism to realize unidirectional rotation to cut the preservative film in four different directions.

The film drawing mechanism 3 comprises a traction assembly, a rotating shaft and a stopper 3-3, wherein the rotating shaft is rotatably connected with the traction assembly, one end of the stopper 3-3 is fixed on the vertical plate 1-1 through a screw, the stopper 3-3 is an electric telescopic cylinder, the stopper 3-3 is hereinafter referred to as the electric telescopic cylinder 3-3, and a telescopic rod of the electric telescopic cylinder 3-3 is rotatably connected with the rotating shaft.

The traction assembly comprises a traction shaft 3-11, traction motors 3-12, gear transmission sets 3-13 and at least four sets of shaft support plates 3-14, wherein the traction motors 3-12 are servo motors without self-locking, the four sets of shaft support plates 3-14 are pairwise fixed on a vertical plate 1-1 and the inner wall of a shell 1 through screws respectively, rotating shafts are rotatably arranged on the two sets of shaft support plates 3-14 on the vertical plate 1-1, the traction shafts 3-11 are rotatably arranged on the two sets of shaft support plates 3-14 on the inner wall of the shell 1, the traction motors 3-12 are fixed on the inner wall of the shell 1 through screws, the traction motors 3-12 are connected with the traction shaft 3-11, helical gears are fixedly arranged on motor shafts of the traction motors 3-12 through screws, one ends of the gear transmission sets 3-13 are rotatably connected with the helical gears, and worms 3-15 are fixedly arranged at the other ends of the gear transmission sets 3-13.

Further optimization, two groups of chaste trees 3-4 are installed on the traction shaft 3-11, a casing is installed on the outer side of each chaste tree 3-4, another group of arrester II No. 3-31, namely an electric telescopic cylinder II No. 3-31, is fixed on one side of the casing through screws, a brake pad is fixed on a telescopic rod of the electric telescopic cylinder II No. 3-31, when the traction motor 3-12 does not work and the electric telescopic cylinder II No. 3-31 works, the brake pad is in contact with the casing and prevents the casing from rotating, when the traction motor 3-12 works and the electric telescopic cylinder II No. 3-31 does not work, the telescopic rod is withdrawn, the brake pad is separated from the casing, and the casing can rotate under the driving of the traction shaft 3-11.

Further optimized, the gear transmission group 3-13 comprises a plurality of groups of support plates fixed on the shell 1, a plurality of groups of transmission shafts rotatably arranged on the support, helical gears, worm gears and worms 3-15, wherein the helical gears are fixedly arranged on the transmission shafts and are in transmission connection with the helical gears on the traction motors 3-12, and the worm gears and worms are arranged on different transmission shafts to transmit power to the traction motors 3-12.

The rotating shaft comprises a follow-up shaft 3-21 and a worm wheel 3-22, shaft supporting plates 3-14 are sequentially and rotatably arranged on the follow-up shaft 3-21 from left to right, limit plates 3-23 are welded, sleeves 3-24 are sleeved, driven plates 3-25 are welded, counter plates 3-26 are slidably arranged, shaft supporting plates 3-14 are rotatably arranged, a plurality of groups of springs are arranged between the counter plates 3-26 and the shaft supporting plates 3-14, the sleeves 3-24 are sleeved on the follow-up shaft 3-21, the driven plates 3-25 are positioned in the sleeves 3-24, linkage plates are welded on the outer surfaces of the sleeves 3-24 close to the limit plates 3-23, linkage semibeads are welded on the end surfaces of one sides of the linkage plates far away from the limit plates 3-23, gear teeth are machined on the inner surfaces of the sleeves 3-24 close to the end surfaces of one sides of the limit plates 3-23, gear teeth are processed on the end face of the driven plate 3-25 close to one side of the limit plate 3-23, the sleeve 3-24 can be meshed with the gear teeth on the driven plate 3-25, the outer surface of the sleeve 3-24 is provided with 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 rotatably connected with the sleeve 3-24 through the threads, the two sides of the worm wheel 3-22 are provided with resistance plates 3-27, the resistance plates 3-27 are fixed on the vertical plate 1-1 through screws, the upper end of the worm wheel 3-22 is rotatably connected with the worm 3-15, the limit plate 3-23 is provided with a limit hole, the aperture of the limit hole is the same as the diameter of the telescopic rod in the electric telescopic cylinder 3-3, and when the traction motor 3-12 works, when the electric telescopic cylinder 3-3 does not work, the telescopic rod is retracted into the electric telescopic cylinder 3-3, the limiting plate 3-23 can freely rotate along with the follow-up shaft 3-21, when the traction motor 3-12 does not work and the electric telescopic cylinder 3-3 works, the telescopic rod extends out and is in contact with the limiting plate 3-23, and when the limiting plate 3-23 rotates and enables the limiting hole to be positioned below the telescopic rod, the telescopic rod is inserted into the limiting hole and limits the rotation of the limiting plate 3-23, so that the rotation of the follow-up shaft 3-21 is limited.

The worm wheel 3-22 comprises two groups of wheel shells 3-221, gear rings 3-222 and rotating rings 3-223, wherein bead grooves are machined on the outer walls of the wheel shells 3-221 on one sides close to the limiting plates 3-23, the positions of the bead grooves correspond to the linkage hemi-beads, two groups of ring grooves 3-224 are machined on the side end faces, opposite to the two groups of wheel shells 3-221, of the gear rings 3-222 and the rotating rings 3-223 are respectively located in the two groups of ring grooves 3-224, the diameters of the rotating rings 3-223 are smaller than those of the gear rings 3-222, the rotating rings 3-223 are located in the gear rings 3-222, the gear rings 3-222 and the rotating rings 3-223 are in rotating connection with the wheel shells 3-221 through the ring grooves 3-224, gear teeth are arranged on the outer surfaces of the gear rings 3-222, the gear rings 3-222 are in rotating connection with the worm 3-15, threads are arranged on the inner surfaces of the rotating rings 3-223, the rotating rings 3-223 are in rotating connection with the sleeves 3-24, and the wheel shells 3-221 and the fixing rings 3-223 are welded between the gear rings 3-221 and the rotating rings 225.

The inner surface of the gear ring 3-222 is provided with a plurality of groups of push blocks 3-226, the inner wall of the wheel shell 3-221 is provided with a sliding groove, the positions of the push blocks 3-226 corresponding to the sliding groove are welded with a support, the support is positioned in the sliding groove, the wheel shell 3-221 limits the rotation of the gear ring 3-222 through the sliding groove and the support, the fixed ring 3-225 is provided with a plurality of groups of through grooves, the outer surface of the fixed ring 3-225 is welded with a plurality of groups of baffle plates 3-227, a plurality of groups of baffle plates 3-227 are positioned at one side of the plurality of groups of through grooves, a plurality of groups of sliding blocks 3-228 are arranged between the gear ring 3-222 and the fixed ring 3-225 in a sliding manner, the baffle plates 3-227 correspond to the sliding blocks 3-228 one by one, a spring is arranged between the baffle plates 3-227 and the sliding blocks 3-228, two ends of the spring are respectively connected with the baffle plates 3-227 and the sliding blocks 3-228, one side of the plurality of the sliding blocks 3-228 in contact with the fixed ring 3-225 is rotatably provided with large pawls 3-229, the sliding blocks 3-229 are arranged at one side of the large pawls 3-229 on one side of the large pawls 3-229, the fixed ring 3-229, the rotating pawl blocks are welded with a plurality of small pawls 230, and the small pawls 230, the small pawls 3-229, the small pawls are connected with the small pawls 230, and the small pawls.

The working principle of the invention is as follows:

a brand new preservative film roll is arranged on a rotating shaft, an empty preservative film roll is arranged on a casing of a traction shaft 3-11, and a section of fresh preservative film roll is drawn out from the brand new preservative film roll and fixed on the empty preservative film roll.

When the traction motor 3-12 does not work and the electric telescopic cylinder II No. 3-31 does not work, the brake block is contacted with the shell and prevents the shell from rotating, when the traction motor 3-12 works and the electric telescopic cylinder II No. 3-31 does not work, the telescopic rod is withdrawn, the brake block is separated from the shell, and the shell can rotate under the driving of the traction shaft 3-11. Meanwhile, when the traction motor 3-12 drives the traction shaft 3-11 to rotate, the electric telescopic cylinder 3-3 does not work, the telescopic rod is retracted from the limiting hole, when the traction motor 3-12 drives the traction shaft 3-11 to rotate, the traction shaft 3-11 drives the empty preservative film roll to rotate through the casing, meanwhile, the traction motor 3-12 drives the follow-up shaft 3-21 to rotate through the bevel gear, the gear transmission set 3-13 and the worm gear 3-22, the brand new preservative film roll starts to rotate through the rotation of the follow-up shaft 3-21, and the preservative film is unfolded between the traction shaft 3-11 and the rotating shaft through the rotation of the empty preservative film roll and the brand new preservative film roll.

When the gear transmission group 3-13 drives the worm wheel 3-22 to rotate, the transmission rod drives the worm 3-15 to rotate, when the worm 3-15 rotates, the gear ring 3-222 is driven by the worm 3-15 to rotate in the wheel shell 3-221, because the resistance plates 3-27 are arranged on two sides of the wheel shell 3-221, the wheel shell 3-221 can bear certain rotation resistance, when the gear ring 3-222 drives the push block 3-226 to rotate in the wheel shell 3-221, the push block 3-226 can push the sliding block 3-228, the spring is compressed, the large pawl 3-229 passes through the through groove to be contacted with the small pawl 3-230, when the small pawl 3-230 is contacted with the large pawl 3-229, the rotation power on the gear ring 3-222 is transmitted to the rotation ring 3-223 through the small pawl 3-230 and the large pawl 3-229, when the rotation ring 3-223 drives the sleeve 3-24 to rotate, the sleeve 3-24 is transmitted to the small pawl 3-223 through the through groove 3-230, and then the large pawl 3-230 is transmitted to the rotation ring 3-223, and the sliding block 3-223 is transmitted to the small pawl 3-230, so as to be completely extended out of the wheel shell 3-223, and finally transmitted to the resistance to the small pawl 3-221, the small pawl 3-230, and the small pawl 3-229, thereby the wheel shell 3-223 is transmitted to be completely transmitted to the resistance to the small pawl 3-230 to be transmitted to the large pawl 3-230 to be completely extended to be transmitted to the small pawl 3-230 to be completely extended out of the wheel shell 3-230.

When the rotating ring 3-223 starts to rotate, the sleeve 3-24 is driven by the rotating ring 3-223 to move to the left on the follow-up shaft 3-21, the reaction plate 3-26 is extruded to enable the reaction plate 3-26 to move to the left on the follow-up shaft 3-21, the spring is compressed, and when the sleeve 3-24 moves to the left end, the linkage half-ball is inserted into the ball groove, and the gear teeth on the sleeve 3-24 and the follow-up plate 3-25 can be meshed, the worm wheel 3-22 drives the follow-up shaft 3-21 to rotate through the sleeve 3-24.

When the traction motor 3-12 stops working, the sliding block 3-228 reversely pushes the pushing block 3-226 under the pushing of the spring, the pushing block 3-226 is pushed by the sliding block 3-228 to drive the gear ring 3-222 to reversely rotate, and as the traction motor 3-12 does not have self-locking, the gear ring 3-222 can drive the worm 3-15 to reversely rotate when reversely rotating, so that the large chaste 3-229 is separated from the contact with the small chaste 3-230 and is retracted into the through groove, the rotating ring 3-223 can reversely rotate in the worm wheel 3-22, and meanwhile, the electric telescopic cylinder 3-3 starts working to enable the telescopic rod to extend out and contact with the limit plate 3-23.

Since the rotating ring 3-223 can be reversed, when the reverse moving plate 3-26 pushes the sleeve 3-24 in the reverse direction by the spring, the sleeve 3-24 can move to the right on the follower shaft 3-21 and move one end of the sleeve 3-24 to a position contacting the stopper plate 3-23, so that the follower shaft 3-21 can rotate freely.

The preservation box with the vegetables is placed on the air supporting cylinder 4, the air supporting cylinder 4 supports the preservation box to the upper portion of the longitudinal rods 2-13, the preservation box is in contact with the preservative film and pulls the preservative film under the supporting of the air supporting cylinder 4 in the process that the preservation box is supported by the air supporting cylinder 4, the preservative film is pulled out of a brand new preservative film roll, when the preservative film is pulled out of the brand new preservative film roll, the brand new preservative film roll drives the follow-up shafts 3-21 to rotate, the follow-up shafts 3-21 drive the limiting plates 3-23 to rotate, the preservative film can be pulled out for a section in order to prevent the preservative film from being broken due to being pulled too tightly in the supporting process, and after the preservative film is pulled out of one end distance, the telescopic rods are inserted into the limiting holes of the limiting plates 3-23 again, and the follow-up shafts 3-21 stop rotating.

After the fresh-keeping box is lifted above the longitudinal rods 2-13 by the supporting and conveying cylinder 4, the motor 2-21 drives the crank 2-24 and the eccentric wheel 2-23 to rotate through the rotating shaft 2-22, the crank 2-24 drives the rocker 2-25 to rotate, the rocker 2-25 converts circular motion into straight motion and transmits power to the extension connecting rod 2-191, the extension connecting rod 2-191 pushes the transverse cutting plate 2-12 to move on the screw rod 2-11 through the extension casing 2-192, at the moment, the screw rod 2-11 rotates forwards, the two groups of transverse cutting plates 2-12 are close to each other, and the two groups of longitudinal rods 2-13 are close to each other.

When the crank 2-24 enables the extension rod 2-19 to move rightwards for the maximum distance through the rocker 2-25, the eccentric wheel 2-23 extrudes the air bag 2-28 to the maximum extent, so that all air in the air bag 2-28 enters the extension space, the air pressure in the extension space is increased, the extension casing 2-192 moves rightwards on the extension connecting rod 2-191 again, the transverse cutting plate 2-12 moves rightwards for a distance again on the screw rod 2-11, and then the two groups of longitudinal rods 2-13 lean together to longitudinally extrude the preservative film, so that the two groups of transverse cutting plates 2-12 are mutually abutted together to transversely cut the preservative film.

When the packaged preservative box is taken away and the supporting and conveying cylinder 4 returns to the original position again, the supporting and conveying cylinder 4 pulls the preservative film when lifting the preservative box, so that one end of the preservative film is added, the traction motor 3-12 can roll up the redundant preservative film through the traction shaft 3-11 when working, then the new preservative film is pulled, in the process of rolling up the redundant preservative film, in order to prevent the follow-up shaft 3-21 from rotating along with the traction motor 3-12, in the process, the traction motor 3-12 can enable the sleeve 3-24 to move leftwards on the follow-up shaft 3-21 through the worm wheel 3-22, and after the redundant preservative film is folded, the sleeve 3-24 just moves to the left end and is meshed with the follow-up shaft 3-21 gear.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (3)

1. The utility model provides a vegetables seal membrane device based on crank rocker mechanism which characterized in that: the vegetable film sealing device comprises a shell (1), a film sealing mechanism (2) and a film pulling mechanism (3), wherein the film sealing mechanism (2) and the film pulling mechanism (3) are sequentially arranged in the shell (1) from left to right, the film pulling mechanism (3) utilizes a worm and gear mechanism to unfold a preservative film, the film sealing mechanism (2) utilizes a crank and rocker mechanism to seal the preservative film on a vegetable preservative box, and the film sealing mechanism (2) utilizes the crank and rocker mechanism to cut the preservative film from four different directions;

the film drawing mechanism is characterized in that a supporting and conveying cylinder (4) is further arranged in the shell (1), the supporting and conveying cylinder (4) is located below the film drawing mechanism (3), a vertical plate (1-1) is arranged in the shell (1), the shell (1) is divided into a power space and a film sealing space by the vertical plate (1-1), two groups of transverse plates (1-2) are sequentially arranged in the power space from top to bottom, and a bearing plate (1-3) is horizontally arranged in the film sealing space; the film sealing mechanism (2) comprises a power assembly and a film sealing assembly (2-1), the power assembly is arranged in a power space and is rotationally connected with the film sealing assembly (2-1), and the film sealing assembly (2-1) is arranged above the bearing plate (1-3); the film drawing mechanism (3) comprises a traction assembly, a rotating shaft and a stopper (3-3), wherein the rotating shaft is rotationally connected with the traction assembly and rotationally connected with the stopper (3-3);

the power assembly comprises a power machine (2-21), a rocker (2-25) and an extension shell (2-26), wherein the power machine (2-21) is arranged on the lower end face of the inner portion of the shell (1), a rotating shaft (2-22) is arranged on the power machine (2-21), a crank (2-24) and an eccentric wheel (2-23) are sequentially arranged on the rotating shaft (2-22) from top to bottom, the eccentric wheel (2-23) is located between the two groups of transverse plates (1-2), the extension shell (2-26) is located between the two groups of transverse plates (1-2) and is fixed with 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 end of the rocker (2-25) is rotatably connected with the film sealing assembly (2-1);

a through groove is formed in a shell of the extension shell (2-26), a push plate (2-27) and an air bag (2-28) are sequentially arranged in the extension shell (2-26) from left to right, connecting rods (2-29) are symmetrically arranged on one side, close to the eccentric wheel (2-23), of the push plate (2-27), sliding grooves are formed in the upper end face and the lower end face of the eccentric wheel (2-23), two groups of connecting rods (2-29) are L-shaped, the L ends of the two groups of connecting rods (2-29) are located in the sliding grooves, the two groups of connecting rods (2-29) are rotatably connected with the eccentric wheel (2-23) through the sliding grooves, the push plate (2-27) is rotatably connected with the eccentric wheel (2-23) through the connecting rods (2-29) and the sliding grooves, and the extension shell (2-26) is rotatably connected with the eccentric wheel (2-23) through the push plate (2-27) and the sliding grooves;

the film sealing assembly (2-1) comprises at least two groups of longitudinal rods (2-13), at least two groups of supporting plates (2-14) and at least four groups of longitudinal plates (2-15), at least two groups of screw rods (2-11) are arranged on the two groups of supporting plates (2-14), two groups of transverse cutting plates (2-12) are symmetrically arranged on the two groups of screw rods (2-11), sliding grooves (2-16) are symmetrically arranged on the upper end surfaces of the two groups of transverse cutting plates (2-12), one group of transverse cutting plates (2-12) close to one side of a vertical plate (1-1) are rotatably connected with rocking rods (2-25), two groups of four groups of longitudinal plates (2-15) are respectively arranged on the vertical plate (1-1) and the inner wall of a shell (1), a sliding rod (2-17) is arranged between the two groups of longitudinal plates (2-15), two ends of the two groups of longitudinal rods (2-13) are respectively provided with lantern rings (2-18), the lantern rings (2-18) are sleeved on the sliding rods (2-17), two groups of longitudinal rods (2-13) are symmetrically arranged on rollers, two groups of rollers are connected with the sliding grooves (2-16) through the sliding grooves (16), and the two groups of roller wheels (16), and the roller wheels are connected with the sliding grooves (2-16), and the two groups of transverse cutting plates (2-16), and the roller wheels (16), and the roller wheels are connected with the sliding grooves (2-16), and the roller wheels (16) (ii) a

The rotating shaft comprises a follow-up shaft (3-21) and a worm wheel (3-22), a shaft support plate (3-14), a limit plate (3-23), a sleeve (3-24), a driven plate (3-25), a reaction plate (3-26) and a shaft support plate (3-14) are sequentially arranged on the follow-up shaft (3-21) from left to right, the sleeve (3-24) is sleeved on the follow-up shaft (3-21), the driven plate (3-25) is located in the sleeve (3-24), the worm wheel (3-22) is sleeved on the sleeve (3-24) and is rotatably connected with the sleeve (3-24), resistance plates (3-27) are arranged on two sides of the worm wheel (3-22), the worm wheel (3-22) is rotatably connected with the worm (3-15), and the limit plate (3-23) is rotatably connected with the movement inhibitor (3-3);

be provided with extension rod (2-19) on transversal cutting board (2-12) near riser (1-1) one side, extension rod (2-19) including extending connecting rod (2-191) and cover extension cover shell (2-192) on extending connecting rod (2-191), the one end and the rocker (2-25) of extending connecting rod (2-191) rotate and are connected, the other end of extending connecting rod (2-191) is provided with the extension board, the extension board is located and extends inside the cover shell (2-192) and with extend cover shell (2-192) sliding connection, the interior surface zonulae occludens of extension cover shell (2-192), the one end that extends cover shell (2-192) and is close to transversal cutting board (2-12) is provided with the air vent, extends cover shell (2-192) and extends shell (2-26) pipe connection.

2. The vegetable film sealing device based on the crank and rocker mechanism as claimed in claim 1, wherein: the worm wheel (3-22) comprises two sets of wheel shells (3-221), gear rings (3-222) and rotating rings (3-223), two sets of wheel shells (3-221) are provided with two sets of ring grooves (3-224) on opposite side end faces, the gear rings (3-222) and the rotating rings (3-223) are respectively located in the two sets of ring grooves (3-224), the diameters of the rotating rings (3-223) are smaller than those of the gear rings (3-222), the rotating rings (3-223) are located in the gear rings (3-222), the gear rings (3-222) and the rotating rings (3-223) are rotationally connected with the wheel shells (3-221), the gear rings (3-222) are rotationally connected with the worms (3-15), the rotating rings (3-223) are rotationally connected with the sleeves (3-24), and fixing rings (3-225) are arranged between the gear rings (3-222) and the rotating rings (3-223).

3. The vegetable film sealing device based on the crank and rocker mechanism as claimed in claim 2, wherein: gear teeth are arranged on the outer surface of the gear ring (3-222), a plurality of groups of push blocks (3-226) are arranged on the inner surface of the gear ring (3-222), the fixed rings (3-225) are fixed with the two groups of wheel shells (3-221), a plurality of groups of through grooves are arranged on the fixed rings (3-225), and the outer surface of the fixed ring (3-225) is provided with a plurality of groups of baffles (3-227), the baffles (3-227) are positioned at one side of the through grooves, a plurality of groups of sliding blocks (3-228) are arranged between the gear ring (3-222) and the fixed ring (3-225), the baffle plates (3-227) correspond to the sliding blocks (3-228) one by one, springs are arranged between the baffle plates (3-227) and the sliding blocks (3-228), large chaste claws (3-229) are arranged on one sides of a plurality of groups of sliding blocks (3-228) which are contacted with the fixed rings (3-225), a plurality of groups of small chaste trees (3-230) are arranged on the end face of one side, close to the fixed ring (3-225), of the rotating ring (3-223), a plurality of groups of large chaste trees (3-229) correspond to the plurality of groups of small chaste trees (3-230) one by one, and the plurality of groups of large chaste trees (3-229) penetrate through the through groove and are rotatably connected with the small chaste trees (3-230).

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