CN215438121U - Cam jacking device and logistics production line - Google Patents

Abstract

The embodiment of the application discloses a cam jacking device and a logistics production line, and the cam jacking device comprises a base; the lifting seat is movably arranged on the base, and the conveying line can be arranged on the lifting seat; the jacking assembly comprises a rotary driving piece and a crank and rocker mechanism, the rotary driving piece is installed on the base, the output end of the rotary driving piece is connected with the crank section of the crank and rocker mechanism, the rocker section of the crank and rocker mechanism is a first cam which is rotatably arranged on the base, and the first cam is in sliding fit with the bottom of the lifting seat to drive the lifting seat to lift relative to the base. The cam jacking device and the logistics production line provided by the embodiment of the application are simple in structure, not only can be used for realizing the horizontal butt joint of conveying lines with different heights, but also greatly reduce the processing and manufacturing cost of the whole cam jacking device and save the occupied area of the whole cam jacking device.

Description

Cam jacking device and logistics production line

Technical Field

The embodiment of the application belongs to the technical field of logistics conveying equipment, and particularly relates to a cam jacking device and a logistics production line.

Background

The storage logistics is to store, keep, load, unload, transport and deliver materials by utilizing self-built or leased storehouses and sites.

In current logistics system or material delivery workshop, need divide into two or many transfer chains with a transfer chain because of waiting to carry the difference of material specification or the demand of overall arrangement is carried in the commodity circulation etc. and for the space and the regional area in maximize utilization delivery workshop, can arrange into the transmission chain of difference not high, the transfer chain of difference promptly can have the difference in height, and the height that the rethread corresponding elevating gear adjusted the transfer chain makes the transfer chain of co-altitude not dock.

But most of current elevating gear complex structure, processing and cost of manufacture are high, and need occupy great vertical height space, and this is unfavorable for the material distribution workshop to arrange the transfer chain of multiple co-altitude, leads to the space utilization in material distribution workshop low.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims at solving at least one technical problem existing in the prior art. Therefore, the embodiment of the application provides a cam jacking device and a material production line, and the cam jacking device is simple in structure, ingenious, low in manufacturing and processing cost, small in occupied area and capable of achieving butt joint of conveying lines with different heights.

The cam jacking device comprises a base; the lifting seat is movably arranged on the base, and the conveying line can be arranged on the lifting seat; the jacking assembly comprises a rotary driving piece and a crank and rocker mechanism, the rotary driving piece is installed on the base, the output end of the rotary driving piece is connected with the crank section of the crank and rocker mechanism, the rocker section of the crank and rocker mechanism is a first cam which is rotatably arranged on the base, and the first cam is in sliding fit with the bottom of the lifting seat to drive the lifting seat to lift relative to the base.

According to some embodiments of the present application, the crank section of the crank and rocker mechanism includes a driving wheel and a knuckle bearing eccentrically connected to the driving wheel, the output end of the rotary driving member is connected to the driving wheel, and the connecting rod section of the crank and rocker mechanism is a first connecting rod having two ends respectively connected to the knuckle bearing and the first cam.

According to some embodiments of the present application, the knuckle bearing is integrally formed with the first link and constitutes a rod end knuckle bearing.

According to some embodiments of this application, first cam is including rotating the installation round wheel on the base and through round pin axle eccentric settings be in eccentric on the round wheel, the one end that the action wheel was kept away from to first connecting rod sets firmly on the round pin axle.

According to some embodiments of this application, the base rotates installs first transmission shaft, first cam fixed connection in the one end of first transmission shaft, the other end of first transmission shaft has set firmly the second cam, the top of second cam with the bottom of lift seat slides the butt and with the top of first cam is in on the same horizontal plane.

According to some embodiments of this application, still rotate on the base and install the second transmission shaft, the both ends of second transmission shaft have set firmly third cam and fourth cam respectively, the third cam pass through the second connecting rod with the second cam is connected, the third cam with the top of fourth cam all with the bottom of lift seat slides the butt.

According to some embodiments of the application, the first cam, the second cam, the third cam and the fourth cam are the same in shape, and the first transmission shaft and the second transmission shaft are on the same horizontal plane and are arranged in parallel at intervals.

According to some embodiments of the application, be equipped with the spacing portion of butt on the lift seat, the outer peripheral face of first cam with the bottom slip butt of the spacing portion of butt.

According to some embodiments of the application, the base with the lift seat all is the frame-shaped, lift seat activity lock is in on the base.

According to the logistics production line of this application second aspect embodiment, including a plurality of foretell cam jacking devices and many transfer chains, the transfer chain corresponds the setting on the lift seat, the transfer chain can be followed the horizontal direction and carried the material.

According to the cam jacking device and the logistics production line that this application embodiment provided, at least, following beneficial effect has:

the embodiment of the application provides a cam jacking device and commodity circulation production line, set up the lift seat through the activity on the base, and install rotary driving piece and crank rocker mechanism on the base, when the transfer chain of installing on the lift seat need rise the take the altitude in order rather than the outside transfer chain level butt joint of top, rotary driving piece can drive the action of crank rocker mechanism, make the first cam in the crank rocker mechanism rotate certain angle around the base, because first cam and the bottom sliding fit of lift seat, utilize the motion trail of first cam, at first cam around base pivoted in-process, the periphery of first cam can upwards jack-up the lift seat, make the lift seat and the relative base of transfer chain on the lift seat rise the take the altitude, and then realize the transfer chain on the lift seat and the function that the outside transfer chain level that is located its top docks. The cam jacking device simple structure that this application embodiment provided, the ingenious structure that has utilized crank rocker mechanism and first cam, not only can realize the level butt joint to the transfer chain of co-altitude not, compare with traditional elevating gear, crank rocker mechanism and first cam all easily process, the preparation, this has still reduced whole cam jacking device's processing and cost of manufacture by a wide margin, and simultaneously, the area occupied of whole cam jacking device has still been fine saved, the space utilization in logistics system or material delivery workshop has been improved, the delivery efficiency of corresponding material has been promoted indirectly.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a matching structure of a cam jacking device and a conveying line provided by an embodiment of the application;

FIG. 2 is an exploded schematic view of FIG. 1;

FIG. 3 is an enlarged partial schematic view at A in FIG. 2;

FIG. 4 is a schematic diagram of a lift platform of the embodiment of the cam jack apparatus shown in FIG. 1;

FIG. 5 is a schematic view of a mating structure of the base and jacking assembly of the embodiment of the cam jacking device of FIG. 1;

FIG. 6 is an enlarged partial schematic view at B in FIG. 5;

FIG. 7 is a top view of a mating structure of the base and jacking assembly of the embodiment of the cam jacking device of FIG. 1;

figure 8 is a side view of a mating structure of the base and jacking assembly of the embodiment of the cam jacking device of figure 1.

Wherein: a base 100; a first drive shaft 110; a second drive shaft 120; the third cam 121; a fourth cam 122; a lifting base 200; abutting against the limiting part 210; a jacking assembly 300; a rotary drive 310; a crank and rocker mechanism 320; a drive wheel 321; a knuckle bearing 322; a first link 323; a first cam 324; a circular wheel 324 a; an eccentric 324 b; a conveyor line 400; a second cam 500; and a second link 600.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the embodiments of the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

In the description of the present application, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of describing the embodiments of the present application and simplifying the description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the embodiments of the present application, unless otherwise explicitly limited, terms such as setting, installing, connecting and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the terms in the present application in combination with the specific contents of the technical solutions.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, 2, 5 and 6, an embodiment of the present application discloses a cam jacking apparatus, including a base 100, a lifting base 200 and a jacking assembly 300. The lifting seat 200 is movably disposed on the base 100, the conveying line 400 may be mounted on the lifting seat 200, the jacking assembly 300 includes a rotary driving member 310 and a crank-rocker mechanism 320 mounted on the base 100, an output end of the rotary driving member 310 is connected with a crank section of the crank-rocker mechanism 320, the crank-rocker mechanism 320 has a rocker section that is a first cam 324 rotatably disposed on the base 100, and the first cam 324 is in sliding fit with the bottom of the lifting seat 300 to drive the lifting seat 200 to lift relative to the base 100.

It should be understood that, in the embodiment of the present application, the conveying line 400 may be a roller conveyor, a belt conveyor, or the like, the conveying line 400 is not limited to a straight forward conveying material, the conveying line 400 may also be a curved conveying line, and the conveying line 400 may also be a turning conveying line having a function of turning a conveying direction on a horizontal plane, that is, the specific structure of the conveying line 400 is not limited, and the structure of the conveying line 400 may also have a function of conveying a material in a horizontal direction. The conveying line 400 can be stably mounted on the lifting base 200 by corresponding fixing mechanisms, for example, the conveying line 400 can be stably mounted on the lifting base 200 by fixing mechanisms such as bolts, buckles or latches, so as to ensure the structural stability of the conveying line 400 on the lifting base 200. It should be understood that when the conveyor line 400 is stably mounted on the lifting base 200, the conveyor line 400 can move up and down synchronously with the lifting base 200. In addition, in the embodiment of the present application, the rotary driving member 310 may be a motor, an electrode, or the like.

The cam jacking device provided by the embodiment of the application has the advantages that through the movable arrangement of the lifting seat 200 on the base 100, and a rotary drive 310 and a crank and rocker mechanism 320 are mounted on the base 100, when the conveyor line 400 mounted on the lifting base 200 needs to be lifted to a certain height to be horizontally butted with an external conveyor line positioned above the conveyor line, the crank and rocker mechanism 320 is driven by the rotary driving member 310, causing the first cam 324 on the crank and rocker mechanism 320 to rotate a certain angle about the base 100, since the first cam 324 is slidably engaged with the bottom of the lifting seat 300, by using the motion track of the first cam 324, during the rotation of the first cam 324 around the base 100, the outer circumference of the first cam 324 lifts the lifting base 300 upwards, so that the lifting base 300 and the conveyor line 400 thereon are lifted to a certain height relative to the base 100, thereby realizing the function of horizontally butting the conveying line 400 on the lifting seat 300 and the external conveying line positioned above the lifting seat.

When the conveyor line 400 mounted on the lifting base 200 needs to be lowered to the initial position to horizontally interface with the initial external conveyor line, the first cam 324 continues to rotate around the base 100 under the driving of the rotary driving member 310 and the linkage action of the crank and rocker mechanism 320, the lifting base 300 is lowered to the initial position along the profile of the first cam 324, at this time, the rotary driving member 310 is closed, the movement of the first cam 324 is stopped, and the lifting base 300 and the conveyor line 400 thereon are stably at the initial position.

Obviously, the cam jacking device provided by the embodiment of the application has a simple structure, skillfully utilizes the structures of the crank rocker mechanism 320 and the first cam 324, and enables the lifting seat 300 to drive the conveying line 400 thereon to do ascending and descending actions along the appearance of the first cam 324 through the sliding fit of the lifting seat 300 and the first cam 324, so that the horizontal butt joint of the conveying lines with different heights is skillfully realized. Simultaneously, compare with traditional elevating gear, crank rocker mechanism and first cam all easily process, preparation, this has reduced whole cam jacking device's processing and cost of manufacture by a wide margin, still fine saving whole cam jacking device's area occupied, improved the space utilization in logistics system or material delivery workshop, indirectly promoted the delivery efficiency of corresponding material.

Referring to fig. 2, 5 to 8, in some embodiments of the present application, the crank section of the crank and rocker mechanism 320 includes a driving wheel 321 and a knuckle bearing 322 eccentrically connected with the driving wheel 321, the output end of the rotary driving member 310 is connected with the driving wheel 321, and the connecting rod section of the crank and rocker mechanism 320 is a first connecting rod 323 with two ends respectively connected with the knuckle bearing 322 and a first cam 324.

It should be understood that, in the above embodiment, the driving wheel 321, the knuckle bearing 322 eccentrically connected with the driving wheel 321, the first link 323, and the first cam 324 respectively form a crank section, a link end, and a rocker section of the crank-rocker mechanism 320, the knuckle bearing 322 may be detachably disposed on a portion of the driving wheel 321 except a circle center through a bolt, a pin, or a bearing, and the knuckle bearing 322 is disposed such that the first link 323 is indirectly connected with the driving wheel 321 through the knuckle bearing 322, thereby effectively reducing a friction force between the first link 323 and the driving wheel 321. Meanwhile, the knuckle bearing 322 can freely swing around the gravity center of the knuckle bearing in the movement process, so that the movement fluency of the whole crank-rocker mechanism 320 is effectively improved, and the first cam 324 can smoothly jack up the lifting seat 300.

In addition, in order to improve the convenience of installing the entire crank and rocker mechanism 320, in some embodiments, the knuckle bearing 322 is integrally formed with the first link 334 to form a rod end knuckle bearing, and by providing the knuckle bearing 322 with the first link 334 as an integral rod end knuckle bearing, the cost of manufacturing and processing the knuckle bearing 322 and the first link 334 independently can be reduced accordingly. Meanwhile, the rod end joint bearing is a standard component, which is convenient for a user to maintain the whole crank and rocker mechanism 320 and replace the rod end joint bearing, so that the crank and rocker mechanism 320 can adapt to the lifting seat 300 and the conveying line 400 with various loads.

Referring again to fig. 6 and 7, in some embodiments of the present application, the first cam 324 includes a circular wheel 324a rotatably mounted on the base 100 and an eccentric wheel 324b eccentrically disposed on the circular wheel 324a via a pin, and an end of the first connecting rod 323 away from the driving wheel 321 is fixed on the pin, it should be understood that in the above embodiments, the circular wheel 324a and the eccentric wheel 324b are regular circles, the eccentric wheel 324b is slidably engaged with the bottom of the lifting base 300, and the circular wheel 324a does not contact the lifting base 300. It should be understood that, during the process of lifting the lifting base 300 upwards by the eccentric 324b, the eccentric 324b also rotates along the portion of sliding fit with the lifting base 300, so as to reduce the friction between the first cam 324 or the eccentric 324b and the lifting base 300, and improve the smoothness of the lifting action of the lifting base 300.

In addition, through the arrangement, the structural strength of the first cam 324 is enhanced, the load bearing capacity of the first cam 324 is improved, the first cam 324 is effectively prevented from being rigidly damaged in the process of jacking the lifting seat 300 and the conveying line 400 on the lifting seat upwards, the structural stability of the movement of the crank-rocker mechanism 320 is further improved, and meanwhile, the first connecting rod 323 and the first cam 324 are convenient to assemble, disassemble and replace.

Of course, in other embodiments, the circular wheel 324a and the eccentric wheel 324b may be integrally welded together to reduce the manufacturing process of the first cam 324.

Referring to fig. 5, 7 and 8 again, in some embodiments of the present application, the base 100 is rotatably installed with the first transmission shaft 110, the first cam 324 is fixedly connected to one end of the first transmission shaft 110, the other end of the first transmission shaft 110 is fixedly installed with the second cam 500, and the top of the second cam 500 is in sliding contact with the bottom of the lifting seat 300 and is located on the same horizontal plane as the top of the first cam 324.

It should be understood that, in an embodiment, in order to save the installation space of the rotary driving member 310, a hollow cavity is opened on the base 100, the rotary driving member 310 is installed inside the hollow cavity, the first transmission shaft 110 is rotatably installed on the base 100 through a bearing, and the first transmission shaft 110 transversely penetrates through the hollow cavity, so as to prevent the remaining parts or portions on the base 100 from contacting the first transmission shaft 110 to affect the rotation of the first transmission shaft 110, and the first cam 324 and the second cam 500 which are disposed on both ends of the first transmission shaft 110 are located on opposite sides of the base 100. Because the first cam 324 is fixedly connected with the first transmission shaft 110, the first cam 324 rotates around the base 100 and simultaneously drives the first transmission shaft 110 to synchronously rotate, so that the second cam 500 positioned on the first transmission shaft 110 synchronously rotates along with the first transmission shaft 110, and thus the first cam 324 and the second cam 500 can simultaneously lift the lifting seat 300 and the conveyor line 400 positioned on the lifting seat 300 upwards, so as to improve the balance stability of the lifting seat 300 and the conveyor line 400 positioned on the lifting seat 300 in the lifting or descending action process, avoid the lifting seat 300 from driving the conveyor line 400 to incline towards one side of the base 100 in the lifting action process, and ensure the butt joint accuracy of the conveyor line 400.

In some embodiments of the present application, referring to fig. 5, 7 and 8 again, in order to further improve the balance stability of the lifting motion of the lifting seat 300 and the conveying line 400, the base 100 is further rotatably mounted with a second transmission shaft 120, two ends of the second transmission shaft 120 are respectively and fixedly provided with a third cam 121 and a fourth cam 122, the third cam 121 is connected with the second cam 500 through a second connecting rod 600, and tops of the third cam 121 and the fourth cam 122 are both in sliding abutment with the bottom of the lifting seat 300. Specifically, the first cam 324, the second cam 500, the third cam 121 and the fourth cam 122 have the same shape, and the first transmission shaft 110 and the second transmission shaft 120 are positioned on the same horizontal plane and are arranged in parallel at intervals.

Obviously, by respectively providing the first cam 324, the second cam 500, the third cam 121 and the fourth cam 122 which are in sliding fit with the lifting seat 300 on the peripheral side of the base 100, under the linkage action of the crank-rocker mechanism 320, the first transmission shaft 110, the second transmission shaft 120 and the second connecting rod 600, the rotary driving member 310 can drive the first cam 324, the second cam 500, the third cam 121 and the fourth cam 122 to synchronously rotate after being opened, so as to drive the lifting seat 300 and the conveyor line 400 installed on the lifting seat 300 to perform lifting action, thereby ensuring the balance stability of the lifting action of the lifting seat 300 and the conveyor line 400, and further improving the docking accuracy of the conveyor line 400.

Referring to fig. 1, 2, 3 and 4, in some embodiments of the present application, the lifting seat 200 is provided with an abutting limiting portion 210, and an outer circumferential surface of the first cam 324 is in sliding abutment with a bottom end of the abutting limiting portion 210. The abutting limiting part 210 can be an ear plate, a bending plate or a flat plate structure welded on the inner wall or the outer wall of the lifting seat 200, and in order to prevent the first cam 324 from shifting to the left and right sides of the lifting seat 200 in the process of jacking the lifting seat 200 upwards, the abutting limiting part 210 is provided with a sliding groove in sliding fit with the first cam 324, so that the stability of the first cam 324 in rotating motion is further ensured.

Referring to fig. 1, 2 and 3 again, in some embodiments of the present application, the base 100 and the lifting seat 200 are both frame-shaped, and the lifting seat 200 is movably fastened on the base 100, specifically, the base 100 and the lifting seat 200 are both square, the base 100 has a cavity with an upward opening, and the rotary driving member 310 is installed in the cavity, so as to reduce an installation occupation area of the rotary driving member 310. Specifically, in this embodiment, when the lifting seat 200 is fastened to the base 100, the bottom of the abutting limiting portion 210 on the inner wall of the lifting seat 200 is just in up-and-down sliding butt joint with the top of the first cam 324, and through the above arrangement, the base 100 also effectively limits the front-back and left-and-right directions of the lifting seat 200, so that the lifting seat 200 only has the freedom of movement in the up-and-down direction, and the accuracy of mutual butt joint of the conveying lines 400 with different heights is further ensured. In addition, the structure that can lock each other with base 100 and lift seat 200 setting has still reduced whole cam jacking device at the occupation space of vertical height by a wide margin, has improved the space utilization in logistics system or material distribution workshop, has indirectly promoted the delivery efficiency of corresponding material.

In addition, this application embodiment still provides a commodity circulation production line, including a plurality of foretell cam jacking devices and many transfer chain 400, transfer chain 400 corresponds the setting on lift seat 200, and transfer chain 400 can be followed the horizontal direction and carried the material.

It is not difficult to understand that, a transfer chain 400 is correspondingly configured to every cam jacking device, and whole commodity circulation production line can divide into many independences, and transfer chain 400 that can independently go up and down, has not only realized the transfer chain 400 horizontal butt joint on each co-altitude in the material distribution workshop, has still increased the variety that various transfer chains 400 were arranged in the material distribution workshop, satisfies the multiple demand of material distribution.

The above description is only a specific implementation of the embodiments of the present application, but the scope of the embodiments of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the embodiments disclosed in the present application, and these modifications or substitutions should be covered by the scope of the embodiments of the present application. Therefore, the protection scope of the embodiments of the present application shall be subject to the protection scope of the claims.

Claims (10)

1. A cam jacking device, comprising:

a base;

the lifting seat is movably arranged on the base, and the conveying line can be arranged on the lifting seat;

the jacking assembly comprises a rotary driving piece and a crank and rocker mechanism, the rotary driving piece is installed on the base, the output end of the rotary driving piece is connected with the crank section of the crank and rocker mechanism, the rocker section of the crank and rocker mechanism is a first cam which is rotatably arranged on the base, and the first cam is in sliding fit with the bottom of the lifting seat to drive the lifting seat to lift relative to the base.

2. The cam jacking device as claimed in claim 1, wherein the crank section of the crank and rocker mechanism comprises a driving wheel and a knuckle bearing eccentrically connected with the driving wheel, the output end of the rotary driving member is connected with the driving wheel, and the connecting rod section of the crank and rocker mechanism is a first connecting rod, the two ends of the first connecting rod are respectively connected with the knuckle bearing and the first cam.

3. The cam jacking device of claim 2, wherein the knuckle bearing is integrally formed with the first link and constitutes a rod end knuckle bearing.

4. The cam jacking device as claimed in claim 2, wherein the first cam comprises a circular wheel rotatably mounted on the base and an eccentric wheel eccentrically disposed on the circular wheel via a pin, and one end of the first connecting rod remote from the driving wheel is fixedly disposed on the pin.

5. The cam jacking device as claimed in claim 1, wherein the base is rotatably provided with a first transmission shaft, the first cam is fixedly connected to one end of the first transmission shaft, the other end of the first transmission shaft is fixedly provided with a second cam, and the top of the second cam is in sliding abutting contact with the bottom of the lifting seat and is positioned on the same horizontal plane with the top of the first cam.

6. The cam jacking device according to claim 5, wherein a second transmission shaft is rotatably mounted on the base, a third cam and a fourth cam are fixedly mounted at two ends of the second transmission shaft respectively, the third cam is connected with the second cam through a second connecting rod, and tops of the third cam and the fourth cam are in sliding abutting joint with the bottom of the lifting seat.

7. The cam jacking device according to claim 6, wherein the first cam, the second cam, the third cam and the fourth cam are identical in shape, and the first transmission shaft and the second transmission shaft are located on the same horizontal plane and are arranged in parallel at intervals.

8. The cam jacking device according to claim 1, wherein the lifting seat is provided with an abutting limiting part, and the outer peripheral surface of the first cam is in sliding abutting contact with the bottom end of the abutting limiting part.

9. The cam jacking device as claimed in claim 1, wherein the base and the lifting seat are both frame-shaped, and the lifting seat is movably fastened to the base.

10. A logistics production line, characterized by comprising a plurality of cam jacking devices according to any one of claims 1 to 9 and a plurality of conveying lines, wherein the conveying lines are correspondingly arranged on the lifting seats, and can convey materials in a horizontal direction.

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