CN210391189U - Linkage device and cage vehicle linkage system applying same - Google Patents

Abstract

The utility model relates to a linkage device and applied this linkage device's cage car linkage system, linkage device includes: a linking seat with a linking rod; a link plate with a jack matched with the link seat; the locking of the linking seat and the linking plate is realized by buckling the linking rod and the insertion hole, and the linking seat and the linking plate can be conveniently linked and hung together.

Description

Linkage device and cage vehicle linkage system applying same

Technical Field

The utility model relates to a commodity circulation container instrument field of goods storage or transportation especially relates to a linkage device and applied this linkage device's cage car linkage system.

Background

At present, the cage car uses very generally at goods storage or turnover in-process, it has the volume big, check the convenience, remove a great deal of advantage such as convenient, however, current cage car side does not set up the antithetical couplet linkage device between cage car and the cage car, the cage car can only single cage car remove at ground turnover goods removal in-process, unable a plurality of cage cars are established ties and are removed, and in the transportation, mutually hit in the car and lead to the mutual collision of express delivery and cage car itself in the cage car, lead to the damage of express delivery and cage car easily.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a linkage device and applied this linkage device's cage car linkage system.

According to the utility model discloses a first aspect provides a linkage device, include:

a linking seat with a linking rod;

the linking plate with the jack is matched with the linking seat, and the linking seat and the linking plate are locked by buckling the linking rod with the jack.

Furthermore, still including locating link and hang the storage tank that is used for placing the link plate on the seat, through link rod removes the lock that realizes link rod and jack or breaks away from in the storage tank.

Further, the linkage rod is vertically arranged on the linkage seat, and the bottom end of the linkage rod extends into the accommodating groove;

the device further comprises a driving device which is arranged on the linkage base and used for driving the linkage rod to move, and the linkage rod is connected with the driving device.

Furthermore, the driving device comprises a vertical plate arranged on the linkage base, and a first movable rod hinged with the vertical plate at the middle part; the first movable rod is driven to rotate around the vertical plate, and the connecting rod rotates along with the vertical plate to move in the accommodating groove.

Furthermore, a connecting rod is arranged at the top end of the connecting rod;

the driving device further comprises a second movable rod, one end of the second movable rod is hinged with the first movable rod, and the other end of the second movable rod is hinged with the connecting rod.

Further, including two first movable rods, first movable rod symmetric distribution is in the hookup pole both sides, just the height of riser is less than the height of hookup pole.

Furthermore, the device also comprises a guide sleeve which is sleeved outside the linkage hanging rod and connected with the linkage hanging base, and a reset mechanism which is used for driving the linkage hanging rod to reset is arranged in the guide sleeve.

Furthermore, the device also comprises a rotating mechanism, and the rotating mechanism is connected with the connecting hanging plate to drive the connecting hanging plate to be far away from or close to the connecting hanging rod.

Further, slewing mechanism includes the mount pad, set up the pivot on the mount pad, set up the bracing piece in the pivot, bracing piece accessible pivot is followed vertical direction and is rotated, the one end that the pivot was kept away from to the bracing piece is connected with alliing oneself with the link plate.

According to the utility model discloses a second aspect provides a cage car allies oneself with system of hanging, in two at least cage cars and a plurality of first aspects the antithetical couplet linkage device, it is same the antithetical couplet of antithetical couplet linkage device hangs the seat, allies oneself with the link plate and installs on the cage car of difference.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model discloses a linkage device of example, through link the peg and remove the lock that realizes linking the peg and jack or break away from in the storage tank, be convenient for will link to hang the seat, link the link plate and link together.

2. The utility model discloses cage car antithetical couplet linkage system of example, a plurality of cage cars of being convenient for are established ties, are favorable to removing a plurality of cage cars simultaneously, and a plurality of cage car series connection can reduce the possibility of mutual striking between the cage car, have reduced the mutual collision of express delivery and cage car itself in the cage car, have reduced the damage of express delivery and the damage of cage car.

Drawings

Fig. 1 is a schematic structural diagram of the rotating mechanism of the present invention.

Fig. 2 is a schematic structural view of the coupling seat of the present invention.

Fig. 3 is a schematic structural view of the guide sleeve.

Fig. 4 is a first cage structure diagram of the cage coupling system.

Fig. 5 is a schematic diagram of a cage structure of the cage coupling system.

Fig. 6 is a schematic structural view of the coupling seat and the coupling plate.

Fig. 7 is a schematic structural view of the jacking device.

Fig. 8 is a first structural schematic diagram of a cage car frame.

Fig. 9 is a structural schematic diagram two of the cage car frame.

Fig. 10 is a structural schematic diagram three of the cage car frame.

Fig. 11 is a fourth structural schematic diagram of the cage car frame.

Fig. 12 is a structural diagram of an L-shaped fixing sidewall.

Fig. 13 is a schematic structural view of the movable base plate.

Fig. 14 is a schematic structural diagram of the expanded skeleton.

Reference numerals shown in the drawings: 1. a connecting and hanging seat; 2. a linkage rod; 21. a connecting rod; 3. connecting the hanging plate; 4. a jack; 5. a containing groove; 6-vertical plate; 61. a first movable bar; 62. a second movable bar; 63. a foot pedal; 7. a guide sleeve; 71. a connecting plate; 72. a return spring; 8. a mounting seat; 81. a rotating shaft; 82. a support bar; 83. a torsion spring; 9. cage vehicle; 100. an L-shaped fixed side wall; 110. a hinge 110; 120. hooking; 130. a caster wheel; 140. rotating the bayonet lock; 150. a limiting clamping groove; 101. a framework; 102. a plate body with holes; 103. a fixed seat with holes; 104. a cross bar; 200. a movable side wall; 3. a front door; 301. a door bolt; 302. a door bolt buckle; 400. a movable bottom plate; 403. a bolt; 404. a bottom fork guide block; 405. a supporting seat; 500. expanding the skeleton; 501. back side expansion; 502. left side expansion; 503. right side expansion; 504. a second vertical bar; 6. an elastic rope net; 700. A jacking device; 70-1, an operating handle; 70-2, a pin shaft; 701. an operating lever; 702. a second movable bar; 703. a cross beam; 704. a jacking rod; 705. a first movable bar; 706. a linkage rod; 707. A first guide sleeve; 708. a second guide sleeve; 709. a connecting seat.

Detailed Description

In order to better understand the technical solution of the present invention, the present invention will be further explained with reference to the following specific embodiments and the accompanying drawings.

Example 1:

a hitch of this embodiment includes:

a linking seat 1 with a linking rod 2 and a linking plate 3 with a jack 4 matched with the linking seat 1; the locking of the linking seat and the linking plate is realized through the buckling of the linking rod and the jack, and the unlocking of the linking seat and the linking plate is realized through the releasing of the buckling of the linking rod and the jack.

Preferably, the connecting device further comprises a containing groove 5 which is arranged on the connecting seat 1 and used for placing the connecting plate 3, the connecting rod 2 is vertically arranged on the connecting seat 1, the bottom end of the connecting rod extends into the containing groove 5, the connecting device also comprises a driving device which is arranged on the connecting base and used for driving the connecting rod 2 to move, the connecting rod 2 is connected with the driving device, the connecting rod 2 moves in the containing groove 5 to realize the buckling or the separation of the connecting rod 2 and the jack 4, the containing groove can play a limiting role in the connecting plate, so that the connecting plate enters a designated interval, and the connecting rod can be buckled with the jack after moving in the containing groove 5; specifically, the driving device comprises a vertical plate 6 arranged on the linkage base, and a first movable rod 61 hinged with the vertical plate 6 at the middle part; through the first movable rod 61 of external drive around riser 6 rotation, link rod 2 moves in storage tank 5 along with riser 6 rotation, and this embodiment link rod reciprocates in the storage tank. The top of the coupling rod 2 is provided with a connecting rod 21, and the driving device further comprises a second movable rod 62, one end of which is hinged with the first movable rod 61, and the other end of which is hinged with the connecting rod 21.

The rotating mechanism is used for installing the link plate 3 and is connected with the link plate to drive the link plate to be far away from or close to the link rod; specifically, the rotating mechanism comprises an installation base 8, a rotating shaft 81 is arranged on the installation base 8, a supporting rod 82 is arranged on the rotating shaft 81, the supporting rod 82 can rotate along the vertical direction through the rotating shaft 81, and one end, far away from the rotating shaft 81, of the supporting rod 82 is connected with the link plate 3; both ends of pivot 81 all set up torsional spring 83, as shown in fig. 5, install slewing mechanism on cage car 9 during the use, torsional spring 83 drives bracing piece 82 and hugs closely cage car 9, convenient storage. As shown in fig. 6, when the rotating mechanism drives the link plate 3 to rotate to the horizontal state, the link plate 3 extends into the accommodating groove 5, and the link rod 2 is inserted into the insertion hole 4 of the link plate 3 to realize the buckling of the link rod 2 and the insertion hole 4, so that the link seat 1 and the link plate 3 are conveniently connected in series. In order to increase the buckling stability of the linking rod 2 and the jack 4, the device also comprises a guide sleeve 7 which is sleeved outside the linking rod 2 and is connected with the linking base, and a reset mechanism for driving the linking rod 2 to reset is arranged in the guide sleeve 7; the reset mechanism comprises a connecting plate 71 sleeved in the guide sleeve 7, the connecting plate 71 is connected with the linking rod 2, the guide sleeve 7 is further provided with a reset spring 72, one end of the reset spring 72 is in contact with the top of the guide sleeve 7, the other end of the reset spring is in contact with the connecting plate 71, and the linking rod 2 is extruded to move downwards, so that the linking rod 2 is always in contact with the accommodating groove 5 when the pedal 63 is not trampled.

As an alternative, the linking seat 1 comprises two first movable rods 61, the first movable rods 61 are symmetrically distributed on two sides of the linking rod 2, the height of the vertical plate 6 is smaller than that of the linking rod 2, and a pedal 63 is arranged at one end of the first movable rod 61 far away from the second movable rod 62, so that a user can conveniently step on the pedal 63 by feet to drive the linking rod 2 to move up and down.

The utility model provides a cage car 9 allies oneself with system of hanging, includes two at least cage cars and a plurality of above-mentioned embodiment 1 the antithetical couplet device, it is same the antithetical couplet of linkage device is hung the seat, is allied oneself with the link plate and installs on different cage cars, during the use through alliing oneself with hang the seat, the locking of alling oneself with the link plate links the cage car and hangs together, a plurality of cage cars 9 ally oneself with to hang in proper order and is favorable to carrying out simultaneous movement with a plurality of cage cars 9, and a plurality of cage cars 9 establish ties and can have reduced the possibility of mutual striking between cage car 9, the mutual collision of express delivery and cage car 9 itself in the cage car 9 has been reduced, the damage of express delivery and cage car.

During the use, will same ally oneself with hang seat 1 and install in the lateral wall of two cage cars 9, simultaneously for making things convenient for a plurality of cage cars 9 to ally oneself with in proper order and hang, install in proper order respectively in the both sides of cage car and ally oneself with the seat of hanging, it can be in the same place with two cage cars ally oneself with simultaneously to link the link plate, link plate 3 and stretch into another storage tank 5 that allies oneself with and hang seat 1 when the slewing mechanism of one of them cage car 9 drives link plate 3 rotatory to the horizontality, step on running-board 63 and will link peg 2 and jack up upwards through second movable rod 62, the inserted bar of alliing oneself with seat 1 inserts in the jack 4 of alliing oneself with link plate 3, it can be interconnected with linking link plate 3 and hang to ally oneself with seat 1, can realize linking of two cage cars 9 and hang, when a plurality of cage cars 9 ally oneself with and hang together just can realize a. The two cage cars 9 can be disengaged and hung by treading down the pedal 63 again through the second movable rod 62 to jack the connecting rod 2 upwards by separating the connecting rod 2 from the jack 4, as shown in fig. 1, the support rod 82 and the rotating shaft 81 form a triangle, materials are saved, the mounting plate 9-3 is mounted on the cage cars 9 to be overturned upwards under the action of the torsion spring 83, the side wall of the cage car 9 (as shown in fig. 2) is tightly leaned, the connecting plate 3 is convenient to store, and the connecting plate 3 is prevented from being dragged when not connected. This embodiment allies oneself with device not only is convenient for a plurality of cage cars 9 to establish ties, is favorable to carrying out a plurality of cage cars 9 and removes simultaneously, still is favorable to a plurality of cage cars 9 to establish ties, and a plurality of cage cars 9 establish ties can reduce the possibility of striking each other between cage car 9 during the transportation, has reduced the mutual collision of express delivery and cage car 9 itself in the cage car 9, has reduced the damage of express delivery and cage car 9.

Simultaneously, for further convenient the collision each other of express delivery and cage car itself in having reduced the cage car, reduced the damage of express delivery and cage car, can also install a top height device on the cage car, the top height device includes:

a jack-up pole 704 slidably connected to the support carrier;

the driving device rotates around a pivot to drive the jacking rod 704 to move up and down along the support carrier; the driving device comprises an operating rod 701 and a link mechanism, wherein the operating rod 701 is positioned above the jacking rod 704, one end of the link mechanism is hinged with the operating rod 701, and the other end of the link mechanism is hinged with the jacking rod 704; specifically, the operating rod 701 rotates towards a direction far away from or close to the limiting device, the link mechanism drives the jacking rod 704 to move up and down so as to control the length of the jacking rod 704 below the support carrier, as an alternative, the fulcrum is located above the jacking rod 704, and the distance from the top end of the operating rod 701 to the fulcrum is greater than the distance from the fulcrum to the link mechanism by using a labor-saving lever principle.

The limiting device can be a limiting bolt installed on a support carrier, the limiting device is located on one side of the fulcrum and connected with the support carrier, and the length of the jacking rod 704 located below the support carrier reaches a preset threshold value, so that the driving device is prevented from rotating to keep the relative position between the jacking rod 704 and the support carrier unchanged.

The jacking device 700 of the embodiment can be used not only for logistics container tools for goods storage or transportation, but also for other fields, and the upper and lower directions are based on the directions shown in the drawings; when the lifting device 700 is placed on a cage car, the preset threshold is the height of the caster 130, so that the caster 130 close to the lifting rod 704 is separated from the ground; when the jacking is released, the operating rod 701 is rotated in the opposite direction to drive the jacking rod 704 to move upwards, so that the length of the lower part of the support carrier is smaller than the height (preset threshold) of the caster 130.

As another alternative, in order to conveniently move the jacking rod 704, the number of the operating rods 701 is two, the operating handle 70-1 is arranged on the operating rod 701, and the limiting device is positioned between the two operating rods 701; the link mechanism comprises a cross beam 703 and a second movable rod 702, the jacking rod 704 is connected with the cross beam 703 and extends downwards along the cross beam 703, one end of the second movable rod 702 is hinged with the cross beam 703, and the other end of the second movable rod 702 is hinged with the operating rod 701. The linkage device is arranged between the two operating rods 701, the two operating rods 701 are linked through the linkage device, specifically, the linkage device comprises a first movable rod 705 and a linkage rod 706, and a first guide sleeve 707 sleeved outside the linkage rod 706 is arranged on the support carrier or the limiting device; one end of the first movable rod 705 is hinged with the operating rod 701, and the other end is hinged with the linkage rod 706. As an alternative, in order to facilitate the linkage rod 706 to be hinged to the two first movable rods 705, the linkage rod 706 further includes a connecting seat 709, the linkage rod 706 extends into the first guide sleeve 707 to the upper side or the lower side of the connecting seat 709, meanwhile, the cross beam 703 is provided with two or more of the lifting rods 704, the two operating rods 701 are shifted to be linked through the linkage rod 706, the force of the two operating rods 701 is applied to the cross beam 703 to prevent the force applied to the two linkage rods 706 from being different, so that the cross beam 703 is inclined, and in addition, the two operating rods 701 can be opened or closed by shifting one operating rod 701, so that the structure is simple, and the operation is convenient and fast. The jacking device not only can be used for logistics container tools for goods storage or transportation, but also is suitable for other fields, the upper and lower directions are based on the directions shown in the attached drawings, and the jacking device can be installed in other reasonable states (such as horizontal) in the actual use process.

Further, for convenient storage, the cage car includes the cage car frame includes:

an L-shaped stationary side wall 100;

the movable side wall 200 is hinged with the L-shaped fixed side wall 100 to form a U-shaped frame, the front door 300 is hinged on the front end of the U-shaped frame, and the two front doors 300 are interlocked through a door bolt 301 and a door bolt buckle 302. The L-shaped fixed side wall 100 and the movable side wall 200 are movably linked with the front door 300 through a hinge 110, the movable side wall 200 comprises a fixed plate, and the width of the fixed plate is not less than the thickness of the movable floor; one side of the fixed plate is fixedly connected with the L-shaped fixed side wall 100, and the other side of the fixed plate is hinged with the movable plate.

The movable bottom plate 400 is arranged at the bottom end of the U-shaped frame and hinged with the L-shaped fixed side wall 100, a framework 101 of the movable bottom plate 400 is provided with a bottom fork guide block 404, the bottom forks refer to two bottom forks of a forklift, and the bottom fork guide block 404 can ensure that the bottom forks cannot collide with the trundles 130 when the bottom fork is used for transporting the cage car from the bottom; the movable bottom plate 400 is rotatably connected with the fixed seat, the bottom end of the L-shaped fixing plate near the movable side wall 200 is provided with the fixed seat 103 with a hole, and the lower surface of the movable bottom plate 400 is provided with a bolt 403 for fixing the movable bottom plate 400, as shown in fig. 13. A support seat for supporting the movable bottom plate 400 is arranged in the U-shaped frame, the movable bottom plate is contacted with the support seat when rotating to the horizontal state, and the spring bolt 403 is inserted into the hole of the perforated plate body 102 to fix the movable floor when the movable bottom plate 400 rotates to be contacted with the support seat or the L-shaped fixed side wall 100.

A transverse plate arranged at the bottom end of the L-shaped fixed side wall 100, wherein any one of the jacking devices 700 is arranged outside the L-shaped fixed side wall 100, and the jacking device 700 is vertically arranged along the outside of one side wall of the L-shaped fixed side wall 100 as shown in fig. 7, the operating rod 701 is rotatably connected with the L-shaped fixed side wall 100 at a pivot point through a pin 70-2, and a stop block or a nut is arranged outside the pin 70-2 to prevent the operating rod 701 from falling off the pin 70-2; the lifting device further comprises a cross rod 104 arranged on the L-shaped fixed side wall 100, the operating rod 701 is located between the L-shaped fixed side wall 100 and the cross rod 104, and the connection stability of the lifting device 700 and the supporting carrier is improved.

The horizontal plate is provided with a through hole, the jacking rod 704 penetrates through the horizontal plate jacking rod 704 through the through hole to move up and down, so that one or more casters 130 can be landed on the ground or lifted off the ground, the operating rod 701 can be rotated to drive the cross beam 703 (the jacking rod 704) and the connecting seat to move up and down, and the operating rod 701 is opened or closed to realize the up-and-down movement of the cross beam 703, so that the structure is simple, the operation is convenient and fast, and preferably, by utilizing the labor-saving lever principle, the distance from the top end of the operating rod 701 to the pin shaft 70-2 is greater than the distance from the pin. The top of the jacking rod 704 is provided with a protrusion, the outside of the jacking rod 704 is relatively positioned between the protrusion and the transverse plate, the spring 8 is sleeved, the spring also comprises a second guide sleeve 708 which is connected with the transverse plate and sleeved outside the jacking rod 704, the linear motion of the jacking rod 704 is guided and limited, the jacking rod 704 can be favorably stored when the jacking is not needed, the jacking rod 704 is positioned, the length below the transverse plate is smaller than the height of the caster 130, the caster 130 is landed, and the cage cart is convenient to move.

The L-shaped fixed side wall 100, the movable side wall 200, the front door 300 and the movable bottom plate 400 are composed of a perforated plate body 102 and a framework 101 fixedly connected with the perforated plate body 102, and the framework 101 can be composed of a first rod body distributed at the edge of the perforated plate body 102 and a second rod body distributed at the edge of the perforated plate body 102 and connected with the first rod body. As shown in fig. 9-11, the cage trolley can be folded, so that space is saved during transportation or storage; when folding, firstly, the two front doors 300 are respectively turned outwards, then the movable bottom plate 400 is turned upwards to the position of the L-shaped fixed side 1 and fixed through the spring bolt 403, so as to prevent the movable bottom plate 400 from turning over by itself under the folding state of the cage vehicle, and then the movable plates are folded inwards, so that the folding of the cage vehicle can be completed, as shown in fig. 11.

As shown in figure 8, during use, the linking and hanging seat 1 is installed on two side walls of a cage car 9, the top lifting device is installed on the L-shaped fixed side wall of the cage car, the linking and hanging seat 1 and the linking and hanging plate 3 of two adjacent cage cars can be connected with each other and hung, the linking and hanging of the two cage cars 9 can be realized, when the cage cars 9 are linked and hung together, the cage cars 9 can be connected in series and moved together, the top lifting rod of the top lifting device can jack up two movable trundles on one side of the cage car to the ground, so that the cage car cannot be moved easily when being used in a road transportation carriage, the possibility of mutual collision of the cage cars is reduced, mutual collision of express delivery and the cage car in the cage car is reduced, and damage of the express delivery and damage of the cage car are reduced.

Example 2:

this embodiment provides a cage car, and the same characteristics as embodiment 1 are not described again, and the different characteristics of this embodiment from embodiment 1 are:

in order to solve the problem that goods are thrown out of the top of the cage car in the vehicle-mounted transportation process of the cage car, a plurality of hollow pipes are vertically arranged on the L-shaped fixed side wall 100 and the movable side wall 200; an expansion framework 500 capable of stretching and retracting up and down is arranged in the hollow pipe, the hollow pipe is connected with the expansion framework 500 capable of stretching and retracting up and down, and the expansion framework 500 comprises a rear expansion 501, a left expansion 502 and a right expansion 503; cage car frame adopts mesh plate, extension skeleton 500 to adopt the tubular metal resonator for cage car structural strength increases, can bear the collision each other on the way in the transportation, can promote cage car life.

Specifically, the extension skeleton 500 includes: a first vertical rod sleeved in the hollow pipe; a cross bar 104 connected to the top end of the first vertical bar; a second vertical rod 504 connected with the cross rod 104, wherein the bottom end of the second vertical rod 504 penetrates through the top support beam of the expansion frame 500 and is provided with a rotating bayonet 140; vertical setting and second montant 504 matched with spout on the fixed lateral wall 100 of L type, activity lateral wall 200, the lateral wall interval of spout sets up a plurality ofly and rotatory bayonet lock 140 matched with spacing draw-in groove 150, after second montant 504 extends to certain position, through operation rotatory bayonet lock 140 screens to spacing draw-in groove 150 after, can realize the location of top extension, flexible activity about extension skeleton 500 changes the loading volume of cage car, and simultaneously, be covered with elasticity rope net 600 on the extension skeleton 500, the net rope all around through tensile elasticity rope net 600 is hung to cage car lateral wall top couple 120 all around, prevent that the cage car that the express delivery was filled with is at the operation in-process, the express delivery is thrown out from the cage car top and is lost, the security of express delivery has been improved.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the features described above have similar functions to (but are not limited to) those disclosed in this application.

Claims (9)

1. A hitch apparatus, comprising:

a linking seat with a linking rod;

the linkage plate is matched with the linkage seat and is provided with a jack, and the linkage seat and the linkage plate are locked by buckling the linkage rod and the jack;

the hanging seat is provided with a containing groove for containing the hanging plate, the bottom end of the hanging rod extends into the containing groove, the containing groove is internally provided with a moving part, and the moving part is locked with the jack of the hanging plate.

2. The hitch device of claim 1, wherein said hitch bar is vertically disposed on a hitch seat;

the device further comprises a driving device which is arranged on the linkage base and used for driving the linkage rod to move, and the linkage rod is connected with the driving device.

3. The coupling device according to claim 2, wherein the driving device comprises a vertical plate disposed on the coupling base and a first movable rod hinged to the vertical plate, and the first movable rod is driven to rotate around the vertical plate to drive the coupling rod to move in the accommodating groove.

4. The coupling device according to claim 3, wherein a connecting rod is arranged at the top end of the coupling rod;

the driving device further comprises a second movable rod, one end of the second movable rod is hinged with the first movable rod, and the other end of the second movable rod is hinged with the connecting rod.

5. The hitch device of claim 3, including two first movable bars symmetrically disposed on opposite sides of the hitch bar, the riser having a height less than the height of the hitch bar.

6. The coupling device according to claim 1, further comprising a guide sleeve sleeved outside the coupling rod and connected with the coupling base, wherein a reset mechanism for driving the coupling rod to reset is arranged in the guide sleeve.

7. The coupling device according to claim 1, further comprising a rotating mechanism, wherein the rotating mechanism is connected with the coupling plate to drive the coupling plate to move away from or close to the coupling rod.

8. The coupling device according to claim 7, wherein the rotating mechanism comprises a mounting seat, a rotating shaft is arranged on the mounting seat, a supporting rod is arranged on the rotating shaft, and the supporting rod can rotate in the vertical direction through the rotating shaft and is connected with the coupling plate at one end far away from the rotating shaft.

9. A cage car linkage system, characterized by comprising at least two cage cars and a plurality of linkage devices according to any one of claims 1-8, wherein the linkage seats and the linkage plates of the same linkage device are arranged on different cage cars.

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