CN111409660A

CN111409660A - Joint underframe of piggyback car

Info

Publication number: CN111409660A
Application number: CN202010130647.1A
Authority: CN
Inventors: 吴振国; 杨亚军; 吴荣坤; 袁博; 郑和平
Original assignee: CRRC Qiqihar Rolling Stock Co Ltd
Current assignee: CRRC Qiqihar Rolling Stock Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-07-14

Abstract

The invention discloses a joint underframe of a piggyback car, which comprises a joint underframe subsection, wherein the joint underframe subsection comprises a joint underframe body, a joint connecting mechanism fixed at the rear end of the joint underframe body and a joint fixed at the front end of the joint underframe; the joint connection mechanism includes: the joint connecting hook has an upward hook opening, and the inner hook surface of the joint connecting hook is provided with a joint groove extending along the transverse direction, and the joint groove is used for placing and upwards supporting the lower circular shaft of the support part of the piggyback car. In addition, the joint connecting mechanism further comprises a joint longitudinal supporting piece used for supporting the supporting portion along the longitudinal direction, and a joint transverse limiting piece used for limiting the transverse position of the supporting portion. In addition, the joint underframe also comprises a locking mechanism capable of limiting the vertical position of the support part and a transverse stopping mechanism capable of assisting the support part to accurately reset. The joint underframe can be reliably connected with the support part and can be conveniently separated from the support part.

Description

Joint underframe of piggyback car

Technical Field

The invention relates to the technical field of piggyback transportation, in particular to a joint underframe of a piggyback car.

Background

Piggyback transportation refers to a convenient transportation mode that after goods are loaded on road vehicles such as road trucks or semi-trailers, the road vehicles automatically start a piggyback car at a train station at an origin and finish long-distance transportation through railways, and after the road vehicles reach a train station at a destination, the road vehicles can automatically start the piggyback car and drive to the final destination.

The body of piggyback car can generally include the body and can separate the support part with it, while loading and unloading the goods, can separate the support part from body first, in order to facilitate the opening and closing of the road vehicle, after loading and unloading the goods is finished, can mount the support part on body. The connection reliability of the body part and the support part of the existing piggyback car is not high, and the body part and the support part are not easy to separate.

Therefore, it is a technical problem to be solved by those skilled in the art to improve the connection reliability and separation convenience of the body part and the support part of the piggyback car.

Disclosure of Invention

In order to solve the technical problem, the invention provides a joint underframe of a piggyback car, which comprises a joint underframe subsection, wherein the joint underframe subsection comprises a joint underframe body, a joint connecting mechanism fixed at the rear end of the joint underframe body and a joint fixed at the front end of the joint underframe body; the joint is connected with the joint of the other joint underframe subsection through a joint bearing, and the two joint underframe subsections can rotate around the transverse direction and the vertical direction in a connecting state; the hook opening of the joint connecting hook faces upwards, the inner hook surface of the joint connecting hook is provided with a joint groove extending along the transverse direction, and the joint groove is used for placing and upwards supporting the lower circular shaft of the support part of the piggyback car.

When the lower circular shaft of the support part is placed in the end part groove, the support part receives upward supporting force from the inner surface of the end part groove, so that the support part is vertically effectively supported, and meanwhile, the inner surface of the end part groove can also play a certain longitudinal limiting role on the lower circular shaft. Therefore, the joint underframe and the support part have better connection reliability. And moreover, the lower circular shaft can be separated from the end part groove by applying upward lifting force to the support part, so that the joint underframe and the support part can be conveniently separated.

Drawings

FIG. 1A is a block diagram of one embodiment of a joint chassis provided in accordance with the present invention;

FIG. 2A is a side view of the truck of FIG. 1A mounted to a truck and connected to a bracket;

FIG. 3A is a view showing the structure of the holder;

FIG. 4A is a block diagram of one of the articulating chassis sections of FIG. 1A;

FIG. 5A is another perspective view of FIG. 4A;

FIG. 6A is a block diagram of another portion of the articulating chassis of FIG. 1A;

FIG. 7A is an exploded view of FIG. 4A;

FIG. 8A is an enlarged view of the longitudinal support of the joint of FIG. 7A;

FIG. 9A is an enlarged view of the lateral joint limiter of FIG. 7A;

FIG. 10A is an enlarged view of the first composition of FIG. 7A;

FIG. 11A is an enlarged view of the second and third articular beams of FIG. 7A;

FIG. 12A is an enlarged view of one of the articulating side bearings of FIG. 7A;

FIG. 13A is an enlarged view of a set of reinforcing plate members of FIG. 7A;

FIG. 1B is a view showing the first locking mechanism mounted to the end coupler;

FIG. 2B is a view showing the configuration of the end portion connecting hook, the holder portion, and the first locking mechanism in a locked state;

FIG. 3B is a side view of FIG. 2B;

FIG. 4B is a side view of FIG. 2B in an unlocked state;

FIG. 5B is a view of the lock body and locking actuation beam assembly coupled together;

FIG. 6B is an exploded view of FIG. 5B;

FIG. 7B is a view showing the first position-limiting portion, the second position-limiting portion and the guide sleeve fixed to the end portion of the hook;

FIG. 1C is a view showing a second locking mechanism mounted to an end coupler;

FIG. 2C is a view showing the structure of the end portion connecting hook, the holder portion and the second locking mechanism in a locked state;

FIG. 3C is a view of the end hitch hook, the bracket, and a second locking mechanism in an unlocked position;

FIG. 4C is a view showing the structure of the guide sleeve, the second position-limiting portion, and the rotary support body fixed to the end connection hook;

FIG. 5C is a diagram of the connection structure of the push beam, the coupling beam unit and the lock body;

fig. 6C is a schematic structural view of the connecting sleeve;

FIG. 7C is a schematic structural diagram of a transfer block;

FIG. 8C is a schematic view of the lock head;

FIG. 9C is a schematic view of the lock body;

fig. 10C is a schematic structural view of the rotary support.

FIG. 1D is a view of the first lateral stop mechanism mounted to the end coupler;

FIG. 2D is a block diagram of one embodiment of a first lateral stop mechanism;

FIG. 3D is an exploded view of FIG. 2D;

FIG. 4D is a schematic structural view of the pedestal;

FIG. 5D is a view showing a split structure of the first coupling beam;

FIG. 6D is a block diagram of another embodiment of the first lateral stop mechanism;

fig. 7D is an exploded view of the coupling structure of the stopper beam and the coupling part of fig. 6D.

FIG. 1E is a diagram showing the relative positions of the second transverse stopping mechanism with respect to the end connecting hook and the holder in the stopping state;

FIG. 2E is an enlarged view of a portion of the circled portion of FIG. 1E;

FIG. 3E is a diagram showing the relative positions of the second transverse stopping mechanism with respect to the end connecting hook and the bracket in an unlocked state;

FIG. 4E is an enlarged view of a portion of the circled portion of FIG. 3E;

FIG. 5E is a view of the second lateral stop mechanism mounted to the end coupler;

fig. 6E is an exploded view of fig. 5E.

The reference numerals are explained below:

1a body part;

3 joint underframe, 3a joint underframe subsection, 31 joint underframe body, 3101 first joint crossbeam, 3102 second joint crossbeam, 3103 third joint crossbeam, 3104 first joint longitudinal beam, 3105 second joint longitudinal beam, 3106 joint traction beam, 3107 first joint floor, 3108 second joint floor, 3109 joint side bearing, 3110 reinforcement plate, 32 joint connecting mechanism, 321 end connecting hook, 321a end groove, 321b knuckle hook main body, 321b-1 knuckle hook split body, 321b-2 knuckle accommodating cavity, 321c knuckle hook wall plate, 321d knuckle first connecting hole, 321e knuckle second connecting hole, 322 end longitudinal support piece, 322a end longitudinal support main body, 322b knuckle wear plate, 323 end transverse limiting piece, 323a knuckle transverse limiting groove, 323b left guide surface, 323c right guide surface, 33 knuckle and 34 knuckle bearing.

4-support part, 412c lower round shaft, 421 upper hook, 422 guide limit piece.

5 locking mechanism, 51 lock body, 511 locking end part, 512 first limit end part, 513 mounting groove, 514 second limit end part, 52 hinge shaft, 521 locking mounting plate, 522 bolt, 53 first limit part, 54 locking driving beam component, 541 pushing beam, 541a connecting sleeve, 541b locking elastic component, 541c supporting component, 542 guiding sleeve, 543 transmission beam and 55 second limit part.

5 ' locking mechanism, 51 ' lock head, 511 ' locking part, 512 ' supporting part, 513 ' arc notch, 514 ' supporting groove, 52 ' lock body, 521 ' insertion section, 522 ' sliding groove, 523 ' large-size supporting section, 524 ' small-size supporting section, 53 ' locking driving beam assembly, 531 ' push beam, 531a ' connecting sleeve, 531b ' first elastic piece, 531c ' supporting piece, 532 ' guide sleeve, 533 ' connecting beam unit, 533a ' first locking connecting beam, 533b ' second locking connecting beam, 533c ' transfer block, 533c-1 ' fixed hinge point, 533c-2 ' first hinge point, 533c-3 ' second hinge point, 54 ' rotating supporting body, 541 ' rotating shaft part, 542 ' first limiting part, 543 ' sliding rail and 55 ' second limiting part.

6 transverse stopping mechanisms, 61 supports, 611 through holes, 612 mounting holes, 613 connecting plates, 614 protective plates, 615 upper cover plates, 62 stopping beams, 621 thick necks, 622 thin necks, 623 step surfaces, 624 first anti-loosening pieces, 63 stopping driving beam assemblies, 631 first connecting beams, 6311 driving ends, 6312 connecting ends, 631a long plates, 631a-1 strip-shaped guide holes, 631b short plates, 631b-1 through holes, 631c rollers, 631d-1 rods, 631d-2 heads, 631d-3 locking nuts, 631e strip-shaped guide grooves, 631f locking pieces, g gaskets, 632 second connecting beams, 633 first connecting shafts, 631a 634 a mounting plate, second hinge shafts, 64 stopping elastic pieces and 65 limiting pieces.

6 ' transverse stopping mechanism, 61 ' stopping beam, 611 ' driving end, 612 ' stopping end, 613 ' hinge shaft, 613a ' large diameter section, 613b ' small diameter section, 613c ' third limiting member, 613d ' gasket, 62 ' limiting beam, 63 ' first limiting member, 64 ' second limiting member and 65 ' stopping elastic member.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below with reference to the accompanying drawings and the detailed description.

First, in the description of the present invention, the longitudinal direction of the piggyback car is set as the front-rear direction. The front part can be the side where the vehicle head is positioned, and can also be the side where the vehicle tail is positioned; facing forward, the left hand side is "left" and the overhead side is "up". In the description of the present invention, the "longitudinal direction" is substantially the front-rear direction, the "lateral direction" is substantially the left-right direction, and the "vertical direction" is substantially the up-down direction, and the position relatively close to the lateral center of the railway track is inward and the position relatively far from the lateral center of the railway track is outward in the lateral direction. Moreover, in the description of the present invention, the terms "first," "second," "third," and the like are used for convenience in distinguishing between descriptions and are not intended to indicate or imply relative importance nor order to be inferred.

As described in the background art, the body of a piggyback car generally includes a body portion and a tray portion 4. The joint chassis 3 provided by the present invention is a part of the body portion. In the transportation process, the support part 4 is connected with the joint underframe 3, so that the reliable connection between the support part 4 and the joint underframe 3 needs to be ensured, and the support part 4 is separated from the joint underframe 3 during loading and unloading, so that the support part 4 and the joint underframe 3 need to be conveniently separated. The joint underframe 3 designed by the invention can be reliably connected with the support part 4 and can be conveniently separated from the support part 4.

As shown in fig. 1A, the joint chassis 3 comprises two joint chassis sections 3 a. The joint chassis section 3a includes a joint chassis body 31, a joint connection mechanism 32, and a joint 33, the joint connection mechanism 32 being fixed to the rear end of the joint chassis body 31, and the joint 33 being fixed to the front end of the joint chassis body 31. The two joint chassis sections 3a have their ends close to each other as front ends thereof, and have their ends far from each other as rear ends thereof. During the application, the joints 33 of the two joint chassis subsections 3a are connected through joint bearings, and in the connection state, the two joint chassis subsections 3a can rotate around the transverse direction and the vertical direction so as to adapt to the flexible requirements when the vehicle turns and walks on a slope.

As shown in fig. 2A, in application, each joint underframe subsection 3a is connected with one bracket 4, so that two adjacent brackets 4 are connected through the joint underframe 3, and a bogie is arranged below the two joint underframe subsections 3a, that is, two joint underframe subsections 3a (one joint underframe 3) are correspondingly arranged on one bogie.

As shown in fig. 4A and 6A, the joints 33 of the two joint chassis sections 3a have different structures, the joint 33 of one joint chassis section 3a is a female joint, the joint of the other joint chassis section 3a is a male joint, and in the connected state, the male joint extends into the female joint to be rotatably connected.

The joint connecting mechanisms 32 of the two joint chassis sections 3a have the same structure and the joint chassis main bodies 31 have the same structure, and in the connected state, the joint connecting mechanisms 32 of the two joint chassis sections are laterally symmetrical to each other and the joint chassis main bodies 31 of the two joint chassis sections are laterally symmetrical to each other. Next, a specific structure of the joint coupling mechanism 32 will be described, and a specific structure of the joint chassis body 31 will be described.

Articulation mechanism 32

As shown in fig. 4A, the articulation mechanism 32 includes an articulation hook 321. The opening of the knuckle joint hook 321 faces upward, and a knuckle groove 321a extending in the transverse direction is formed on the inner hook surface of the knuckle joint hook 321.

As shown in fig. 3A, a lower circular shaft 412c is provided below the end of the holder 4.

As shown in fig. 2A, in the coupled state, the lower circular shaft 412c of the holder 4 is seated in the joint groove 321a, and is supported upward by the inner surface of the joint groove 321a, so that the lower circular shaft 412c is supported vertically and effectively, and the inner surface of the joint groove 321a also has a certain longitudinal limit function. Therefore, the joint underframe 3 and the support part 4 have better connection reliability. Moreover, by applying an upward lifting force to the holder 4, the lower circular shaft 412c can be disengaged from the joint groove 321a, facilitating the separation of the joint chassis 3 from the holder 4.

Further, as shown in fig. 4A, the joint connecting mechanism 32 further includes a joint longitudinal supporting member 322, and the joint longitudinal supporting member 322 is located above the joint connecting hook 321, specifically, directly above or obliquely above.

As shown in fig. 8A, the joint longitudinal support 322 includes a joint longitudinal support body 322a and joint wear plates 322b fixed at the front and rear ends of the joint longitudinal support body 322 a.

As shown in fig. 3A, an upper hook 421 is provided on the upper side of the end of the holder 4, and the hook opening of the upper hook 421 faces downward.

As shown in fig. 2A, in the connected state, the end vertical support main body 322A extends into the hook opening of the upper hook 421, and the two hook together, and at the same time, the joint wear plate 322b at the front end abuts against the front side of the inner hook surface of the upper hook 421, and the joint wear plate 322b at the rear end abuts against the rear side of the inner hook surface of the upper hook 421, thereby performing a vertical support function on the holder 4. Therefore, the connection reliability of the joint underframe 3 and the support part 4 can be further improved, and the separation convenience of the joint underframe 3 and the support part 4 is not influenced.

As shown in fig. 8A, the upper portion of the front end joint wear plate 322b is inclined rearward relative to the lower portion, and the upper portion of the rear end joint wear plate 322b is inclined forward relative to the lower portion. Meanwhile, the inner surface of the joint groove 321a forms a joint guide surface capable of guiding the joint chassis section 3a to rotate about the lateral direction when engaged with the lower circular shaft 412 c. With such arrangement, when the support part 4 is connected with the joint chassis 3, along with the gradual falling of the support part 4, the clamping degree between the joint longitudinal support main body 322a and the upper hook 421 is gradually increased, so that the upper hook 421 can firmly hook the joint longitudinal support main body 322 a; when the support part 4 and the joint underframe 3 are separated, an upward lifting force (force F in fig. 2A) is applied to the position of the joint underframe 3 close to the rear end, and when the joint underframe 3 is lifted to a certain height, the joint underframe 3 rotates around the transverse direction (arrow direction in fig. 2A) by taking the lifting force acting position as a fulcrum under the guiding action of the inner surface of the joint groove 321a, so that the clamping degree of the joint longitudinal support main body 322A and the upper hook 421 is gradually weakened, and the lower circular shaft 412c gradually slides out of the joint groove 321a, thereby facilitating the separation of the joint underframe 3 and the support part 4. In short, by such an arrangement, the connection reliability and the separation convenience of the joint underframe 3 and the holder 4 can be improved.

In the illustrated embodiment, the top of the joint longitudinal support main body 322a is a trapezoid structure with a small top and a large bottom (see fig. 8A), and the height position of the joint wear plate 322b at the rear end is lower than the height position of the joint wear plate 322b at the front end, so that the joint chassis section 3a can be smoothly rotated in the transverse direction without interference. Of course, the structure for avoiding interference is not limited to this, and may be adjusted appropriately in actual implementation. In fig. 8A, the joint wear plate 322b is connected to the joint longitudinal support body 322a by bolts and nuts, and the joint longitudinal support body 322a has a hollow structure and is provided with an oblong hole at the bottom, so that the joint wear plate 322b can be replaced conveniently.

In the illustrated embodiment, the joint recess 321a is a cylindrical recess (see fig. 4A), so that the inner surface thereof can serve as the guide when being engaged with the cylindrical lower shaft 412c, but the joint recess 321a is not limited to the cylindrical recess in practical implementation.

Further, as shown in fig. 4A, the joint connecting mechanism 32 further includes a joint transverse limiting member 323, the joint transverse limiting member 323 is located above, specifically directly above, or obliquely above the joint connecting hook 321, and the joint transverse limiting member 323 is located in front of, specifically directly in front of, or obliquely in front of the joint longitudinal support member 322.

As shown in fig. 9A, the joint lateral restraint 323 includes a joint lateral restraint groove 323 a.

As shown in fig. 3A, a guide stopper 422 is provided at an end of the holder 4.

As shown in fig. 2A, in the connected state, the guide limiting member 422 is inserted into the joint transverse limiting groove 323a, and a left groove wall and a right groove wall of the joint transverse limiting groove 323a are respectively located at left and right sides of the guide limiting member 422 to limit the transverse position of the guide limiting member 422. In this way, the reliability of connection between the joint chassis 3 and the receiver 4 can be further improved.

In the illustrated embodiment, left and right groove wall upper portions of the joint transverse limiting groove 323a are formed with left and right guide surfaces 323b and 323c, respectively (see fig. 9A), and an upper side of the left guide surface 323b is inclined to the left with respect to a lower side thereof, and an upper side of the right guide surface 323c is inclined to the right with respect to the lower side thereof, so that the guide limiting member 422 is guided into the joint transverse limiting groove 323 a.

In fig. 9A, the joint transverse limiting member 323 is composed of a U-shaped plate and two rib plates, and in practical implementation, the structure of the joint transverse limiting member 323 is not limited thereto.

Joint chassis body 31

As shown in fig. 4A and 5A, the joint chassis body 31 includes a first joint cross member 3101, a second joint cross member 3102, a third joint cross member 3103, a first joint longitudinal member 3104, a second joint longitudinal member 3105, a joint traction member 3106, a first joint floor 3107, and a second joint floor 3108.

The first joint cross beam 3101 is arranged behind the second joint cross beam 3102 and the third joint cross beam 3103, the left end of the first joint cross beam 3101 is fixed with the left end of the second joint cross beam 3102 through the first joint longitudinal beam 3104, the right end of the first joint cross beam 3101 is fixed with the right end of the third joint cross beam 3103 through the second joint longitudinal beam 3105, and the right end of the second joint cross beam 3102 and the left end of the third joint cross beam 3103 are fixed with the front end of the joint traction beam 3106, respectively, so as to form a joint frame; the rear end of the joint traction beam 3106 is fixed to the first joint beam 3101; the beam-to-beam fixation may be welding. The joint 33 is fixed to the front end of the joint traction beam 3106, and may be welded.

The first joint floor 3107 and the second joint floor 3108 are covered on the top frame opening of the joint frame and are respectively positioned at the left and right sides of the joint traction beam 3106, the first joint floor 3107 is fixed on the second joint cross beam 3102, the first joint longitudinal beam 3104 and the joint traction beam 3106, and the second joint floor 3108 is fixed on the third joint cross beam 3103, the second joint longitudinal beam 3105 and the joint traction beam 3106, which may be welded and fixed.

As shown in fig. 10A, the first joint beam 3101 and the joint connection hook 321 constitute a first component. In the figure, two joint connection hooks 321 are provided, one of which is fixed to the lower side of the left end of the first joint beam 3101 and the other of which is fixed to the lower side of the right end of the first joint beam 3101. With reference to fig. 4A, two joint longitudinal supports 322 are further provided, one fixed to the rear side of the left end of the first joint beam 3101, and the other fixed to the rear side of the right end of the first joint beam 3101; two joint lateral stoppers 323 are also provided, one fixed to the left end upper side of the first joint beam 3101 and the other fixed to the right end upper side of the first joint beam 3101.

In a specific embodiment, the second joint beam 3102 and the third joint beam 3103 have the same structure, and each of them includes a bottom plate, double webs, and a partition plate disposed between the double webs (see fig. 11A). The first and second articulated

stringers

3104, 3105 are identical in structure and are each a channel beam with its notch facing upward (see fig. 7A). The first joint floor 3107 and the second joint floor 3108 have the same structure, and are both plate structures with a hole in the center. The knuckle traction beam 3106 includes a traction upper deck and a traction lower deck with a traction riser disposed therebetween.

Further, as shown in fig. 4A, the joint chassis body further includes two joint side bearings 3109, the two joint side bearings 3109 are respectively located on the left and right sides of the joint 33, one joint side bearing 3109 is fixed on the front side of the second joint beam 3102, and the other joint side bearing 3109 is fixed on the front side of the third joint beam 3103. In a specific embodiment, the two articular side bearings 3109 have the same structure. As shown in fig. 12A, the articulated side bearing includes a side bearing lower cover plate, a side bearing upper cover plate, and a side bearing vertical plate disposed therebetween.

Further, as shown in fig. 4A, the joint chassis body 31 further includes a reinforcing plate 3110. In a specific embodiment, two sets of stiffening plate members 3110 (see fig. 7A) are provided, one set of stiffening plate members 3110 is fixed between the first joint floor 3107 and the first joint beam 3101, and the other set of stiffening plate members is fixed between the second joint floor 3108 and the first joint beam 3101. As shown in fig. 13A, each set of stiffening elements 3110 includes one transverse rib and two triangular ribs.

Further, the joint chassis section 3a further includes a locking mechanism, and as shown in fig. 10A, the joint coupling hook 321 includes a joint hook main body 321b, and the joint hook main body 321b includes two joint hook sub-bodies 321b-1 arranged at a spacing in the transverse direction and a joint accommodating cavity 321b-2 formed between the two joint hook sub-bodies 321b-1, and the joint accommodating cavity 321b-2 is used for installing the locking mechanism. Through setting up locking mechanism, can avoid the risk that joint chassis 3 and support portion 4 are along vertical departure when moving to the undulation highway section in the transportation, further improve the connection reliability of joint chassis 3 and support portion 4.

In fig. 10A, the joint coupling hook 321 further includes a joint hook wall 321c covering the outer hook surface of the joint hook main body 321b, the joint hook wall 321c is provided with a joint first connection hole 321d, and the joint first connection hole 321d is communicated with the joint accommodating cavity 321b-2, so that the unlocking component can extend into the joint accommodating cavity 321b-2 through the joint first connection hole 321d to unlock the locking mechanism, and after unlocking, the holder 4 can be separated from the joint chassis 3.

Two latching mechanisms are shown, a first latching mechanism being shown in FIGS. 1B-7B and a second latching mechanism being shown in FIGS. 1C-10C. The two are described below one by one.

First locking mechanism

As shown in fig. 1B-7B, the locking mechanism 5 includes:

the lock body 51 is hinged with the joint connecting hook 321 through a hinge shaft 52, one end of the lock body 51 is a locking end 511, the other end is a first limiting end 512, and the hinge shaft 52 is positioned between the locking end 511 and the first limiting end 512.

A first limit part 53, wherein the first limit part 53 is fixed in the joint accommodating cavity 321B-2 (see fig. 7B);

a lock actuation beam assembly 54 coupled to the lock body 51;

in the locked state, as shown in fig. 3B, the first limiting end 512 abuts against the first limiting portion 53 from top to bottom, and the locking end 511 abuts against the holder 4 to lock the holder 4; in the unlocked state, as shown in fig. 4B, the locking driving beam assembly 54 can drive the first limiting end 512 to be separated from the first limiting portion 53 from bottom to top, and the locking end 511 is rotated to be separated from the bracket 4.

With such a structure, as shown in fig. 3B and 4B, when locking, if there is a separation trend between the holder 4 and the joint connecting hook 321, the holder 4 will generate an upward force on the locking end 511 to drive the locking end 511 to rotate counterclockwise, and due to a bottom-up supporting force generated by the first limiting part 53 on the first limiting end 512, the lock body 51 can be blocked from rotating counterclockwise, so that the position of the locking end 511 can be ensured to be unchanged, and the holder 4 can be reliably locked; when the lock is unlocked, the locking driving beam assembly 54 can drive the first limiting end part 512 to be separated from the first limiting part 53 from bottom to top, the lock body 51 can rotate clockwise, the rotating direction of the lock body is opposite to the stopping direction of the first limiting part 53, the locking end part 511 and the support part 4 can be separated smoothly, the support part 4 can be unlocked smoothly, and the separation of the support part 4 and the joint connecting hook 321 is not influenced.

Here, the embodiment of the present invention does not limit the structure of the first stopper 53, and may be plate-shaped or block-shaped; similarly, the embodiment of the present invention also does not limit the number of the first limiting portions 53, and may include one limiting member or a plurality of mutually independent limiting members, as long as the above-mentioned technical effects can be achieved.

In a detailed embodiment, as shown in fig. 5B, the locking driving beam assembly 54 may include a push beam 541, a guiding sleeve 542, and a driving beam 543, wherein the guiding sleeve 542 is fixed in the joint accommodating chamber 321B-2 (see fig. 7B), the push beam 541 and the guiding sleeve 542 are slidably connected, one end of the driving beam 543 may be hinged to the lock body 51, and the other end is hinged to the push beam 541.

Thus, when the push beam 541 is moved upwards by a driving force, the transmission beam 543 hinged thereto may convert the linear motion of the push beam 541 into a rotational motion of the lock body 51, so as to transmit the unlocking driving force to the lock body 51, thereby unlocking the lock body 51; when the driving force disappears, the push beam 541 can automatically slide down along the guide sleeve 542 by means of its own gravity, and drive the lock body 51 to rotate in the reverse direction, so as to realize the automatic locking of the lock body 51, or the external device can provide the reverse driving force to drive the push beam 541 to reset and lock.

Specifically, the push beam 541 may face the joint first connection hole 321d (refer to fig. 3B and 4B) so that the unlocking member can contact the push beam 541 through the joint first connection hole 321d, thereby applying an upward unlocking driving force to the push beam 541.

It should be noted that, in the embodiment of the present invention, the source of the driving force received by the push beam 541 during unlocking is not limited, and a manual driving scheme may be adopted, for example, an unlocking member such as an unlocking lever may be provided, and when unlocking is required, an operator may manually operate the unlocking member to generate the driving force for the push beam 541; or, an automatic driving scheme may also be adopted, in this case, the power source may be a motor, an air cylinder, an oil cylinder, or the like, the power source may be mounted on the vehicle body, or may be mounted on the ground equipment, which may be specifically selected according to the actual situation, and a transmission mechanism may also be disposed between the power source and the push beam 541 to transmit the driving force of the power source.

The beam section of the push beam 541 above the guiding sleeve 542 may further be provided with a connecting sleeve 541a, as shown in fig. 6B, the connecting sleeve 541a may be a U-shaped plate, a bottom plate portion of the U-shaped plate may be connected to the push beam 541 and may form a support with the guiding sleeve 542 to serve as a limiting component for downward movement of the push beam 541, and the transmission beam 543 may be hinged between two side plate portions of the U-shaped plate.

In fact, the downward movement limitation of the push beam 541 can also be realized by the cooperation of the first limitation end 512 and the first limitation portion 53, so that the connection sleeve 541a can also be absent; alternatively, the driving beam 543 may be used for limiting, the driving beam 543 and the pushing beam 541 are hinged, and the driving beam 543 and the pushing beam 541 are usually disposed at an included angle in the actual working process, and the driving beam 543 may also be used as a limiting component for downward movement of the pushing beam 541.

In the above-mentioned solution, the linear motion of the push beam 541 is converted into the rotational motion of the lock body 51 through the transmission beam 543, and in fact, other solutions may be adopted besides this solution, for example, a guide hole may be provided on the lock body 51, the push beam 541 may be hinged in the guide hole, and when the push beam 541 generates an axial displacement, the hinged shaft of the push beam 541 may slide in the guide hole to naturally drive the lock body 51 to rotate, so that the conversion from the linear motion to the rotational motion may also be realized.

Further, the locking mechanism 5 may further include a locking elastic member 541b, one end of the locking elastic member 541b may interact with the push beam 541, and the unlocking process is a process of increasing a deformation amount of the locking elastic member 541b to gather an elastic force. With this arrangement, when the driving force applied to the push beam 541 disappears, the elastic force of the locking elastic member 541b can be released to cooperate with the gravity of the push beam 541 itself to drive the lock body 51 to be reset and locked.

Specifically, the locking elastic member 541b may be a spring, which may be externally fitted to the push beam 541, and a supporting member 541c may be provided at a lower end portion of the push beam 541, and both ends of the spring may respectively interact with the guide sleeve 542 and the supporting member 541 c. The push beam 541 can serve as a spring column, so that the radial movement of a spring in the expansion process can be prevented, and the positive effects of improving the structural stability and the power transmission reliability are achieved; with this structure, the push beam 541 can be displaced upward and the locking elastic member 541b can be compressed in the unlocked state, and the push beam 541 can be displaced downward and the locking elastic member 541b can be released when the locking is restored.

In fact, the locking elastic member 541b may have a certain pre-compression amount in the locking state, that is, the locking elastic member 541b may still provide a certain elastic force when locking, which has a positive effect on ensuring the stable locking state of the lock body 51, and may avoid the automatic unlocking of the lock body 51 when the rail vehicle passes through a curve.

To conveniently adjust the precompression amount, the supporting member 541c may be a nut, so that the distance between the supporting member 541c and the guide sleeve 542 can be adjusted by changing the screwing position of the nut, and thus the precompression amount of the locking elastic member 541b in the locked state can be adjusted.

In the unlocked state, the locking elastic member 541b may be actually in a stretched state, and the installation position of the locking elastic member 541b may be changed, and specifically, it may be disposed between the connection sleeve 541a and the guide sleeve 542, and both ends of it may be fixedly connected to the connection sleeve 541a and the guide sleeve 542, so as to transmit the pulling force.

The lock body 51 may be provided with a mounting groove 513, and the driving beam 543 may be hinged in the mounting groove 513, so that the thickness of the locking mechanism provided by the present invention in the axial direction of the hinge shaft of the driving beam 543 and the lock body 51 may be smaller, and the overall structure may be more compact. Besides, the installation groove 513 can be arranged in the transmission beam 543, and then the lock body 51 can be hinged in the installation groove 513 of the transmission beam 543; alternatively, the installation groove 513 may not be provided, and in this case, the thickness of the assembly formed by the driving beam 543 and the lock body 51 in the axial direction of the hinge shaft of the driving beam 543 and the lock body 51 may be relatively large.

Further, the locking mechanism 5 may further include a second limiting portion 55 fixedly disposed, and the second limiting portion 55 may be fixed in the joint accommodating cavity 321b-2, and the structure and the like thereof may be similar to those of the first limiting portion 53, and will not be described repeatedly herein; the lock body 51 may further include a second limiting end 514, and in the locked state, the second limiting end 514 may abut against the second limiting portion 55 from bottom to top.

In this way, in the locked state, the lock body 51 can form a three-point supporting scheme, the stress of the lock body 51 is more balanced, and the lock body 51 is more reliable for locking the support part 4.

In detail, the lock body 51 may include two angled lock arms, which may form approximately L, the hinge shaft 52 may be disposed at a joint of the two lock arms, that is, a corner of L, wherein an end of one lock arm away from the hinge shaft 52 may be the lock end 511, an end of the other lock arm away from the hinge shaft 52 may be the first limit end 512, and a small angle (<180 degrees) and a large angle (>180 degrees) are formed between the two lock arms, wherein the small angle is located at an inner end of the joint, the large angle is located at an outer end of the joint, and the outer end may be the second limit end 514.

With reference to fig. 3B, in the locked state, the first position-limiting portion 53 may generate a bottom-up supporting force for the first position-limiting end 512, the second position-limiting portion 55 may generate a top-down supporting force for the second position-limiting end 514, and the force applied to the lock body 51 may be more balanced by the upward thrust generated by the holder portion 4 for the locking end 511; moreover, the hinge shaft 52 is in a substantially unstressed state by the interaction of the three stress points, which has a positive effect on ensuring the reliability of the locking mechanism.

The locking mechanism provided by the present invention may be installed on the knuckle coupling hook 321, and besides the installation supporting point formed by the guide sleeve 542, the first limiting portion 53, and the second limiting portion 55, the hinge shaft 52 may also be used as an installation supporting point, specifically, referring to fig. 6B, the outer wall of the hinge shaft 52 may be provided with a slot, and a locking mounting plate 521 may be disposed in the slot (the connection manner between the locking mounting plate 521 and the hinge shaft 52 may also be directly welded), and the locking mounting plate 521 may be connected to the knuckle coupling hook 321 by a connector in the form of a bolt 522, and of course, besides the bolt connection, the locking mounting plate 521 and the knuckle coupling hook 321 may also be fixedly connected by a welding manner.

Second locking mechanism

When the locking mechanism 5' is locked, the support part 4 and the joint connecting hook 321 can be locked vertically so as to ensure the reliable connection between the support part and the joint connecting hook 321 and the driving safety, and when the locking mechanism is unlocked, the convenience of separation of the support part 4 and the joint connecting hook 321 is not influenced.

As shown in fig. 1C-10C, the locking mechanism 5' includes:

a locking head 51 'rotatably coupled to the knuckle coupling hook 321, the locking head 51' being provided with a locking portion 511 'and a supporting portion 512' at both sides of a rotation center line thereof, respectively;

a lock body 52 ', the lock body 52' being slidably coupled to the articulation hook 321;

the locking driving beam component 53 'is in transmission connection with the lock body 52'; in the locked state, the lock body 52 ' is supported from the bottom up with the support part 512 ' so that the locking part 511 ' presses the holder part; in the unlocked state, the locking driving beam assembly 53 ' can drive the lock body 52 ' to displace in a direction away from the locking head 51 ', and the supporting portion 512 ' can rotate downward around the rotation center line, so that the locking portion 511 ' rotates upward to be disengaged from the holder.

With the structure, in the locked state, if the support part and the joint connecting hook 321 are separated from each other, the support part will generate an upward force on the locking part 511 'to drive the lock head 51' to rotate counterclockwise, and due to the bottom-up supporting force generated by the lock body 52 'on the support part 512', the lock head 51 'can be blocked from rotating counterclockwise, so that the position of the locking part 511' can be ensured to be unchanged, and the support part can be reliably locked; referring to fig. 3C, when unlocking, the locking driving beam assembly 53 ' may drive the lock body 52 ' to slide in a direction away from the locking head 51 ', the supporting portion 512 ' may rotate downward around the rotation center line, and the locking portion 511 ' may rotate upward to unlock the holder without affecting the separation of the holder 4 from the articulation hook 321.

The above-mentioned rotation setting of the locking head 51 'may be specifically a hinge setting, in which case, a hinge shaft may be provided for the locking head 51', the hinge shaft may be fixed to the joint connection hook 321, and is located between the locking portion 511 'and the supporting portion 512'. Alternatively, a rotation support 54 'may be further provided, the rotation support 54' may be fixed to the joint hook 321, and may have a rotation shaft 541 ', the rotation shaft 541' has an arc-shaped cylindrical surface, and the lock 51 may have an arc-shaped notch 513 'matching with the rotation shaft 541', where matching means that the outer diameter of the rotation shaft 541 'substantially matches the inner diameter of the arc-shaped notch 513'. During assembly, the lock head 51 ' can be inserted into the rotating shaft 541 ' through the arc notch 513 ' and can rotate with the central axis of the rotating shaft 541 ' as the rotating center line, so that the lock head 51 ' can also be rotatably arranged.

When unlocking, the rotation of the lock head 51 ' can be realized by means of the offset of the center of gravity, the center of gravity of the lock head 51 ' can be deviated from the rotation center line in the longitudinal direction and is located at the side of the support part 512 ', specifically, referring to fig. 2C, the arc notch 513 ' can be arranged at the right side of the center of gravity of the lock head 51 ', so that when the lock body 52 ' is displaced to the left, the lock head 51 ' can naturally rotate counterclockwise to release the locking of the support part.

And/or, a second elastic member in the form of a spring or the like may be provided for the lock head 51 ', and in the locked state, the second elastic member may gather elastic force in the form of tensile force/compressive force or the like, and when the lock body 52 ' is gradually moved away, the elastic force of the second elastic member may be released to drive the lock head 51 ' to automatically rotate and unlock. In comparison, the above two modes can both realize the automatic rotation of the lock head 51' during unlocking, and in specific implementation, a person skilled in the art can select the mode according to actual needs.

With reference to fig. 4C, during specific assembly, the number of the rotating supports 54 ' may be two, so that the lock head 51 ' may be erected on the two rotating supports 54 ', the stability of installation of the lock head 51 ' is higher, and the space between the two rotating supports 54 ' may be used for inserting the lock body 52 ', and the connection structure of the lock head 51 ', the lock body 52 ' and the rotating supports 54 ' may be more compact.

As shown in fig. 10C, the rotary support 54 'may further include a first limiting portion 542', the first limiting portion 542 'may be an angle, and the first limiting portion 542' may abut against the support portion 512 'in an unlocked state to limit the downward rotation of the support portion 512', and may support a gap in which the lock body 52 'is inserted from below the support portion 512', so that the lock body 52 'is inserted again, and the support portion 512' is supported.

Here, the embodiment of the present invention does not limit the supporting height of the first limiting portion 542 ', and in the specific implementation, a person skilled in the art may set the supporting height according to actual needs, as long as when the first limiting portion 542 ' and the supporting portion 512 ' are supported, the locking portion 511 ' may unlock the holder portion, and at the same time, an insertion gap of the lock body 52 ' is reserved.

Further, as shown in fig. 8C, a supporting groove 514 'may be further disposed on the locking head 51', and when the locking head is unlocked, the first limiting portion 542 'may be inserted into the supporting groove 514'. It is understood that the depth of the first position-limiting portion 542 ' inserted into the supporting groove 514 ' actually determines the supporting height of the supporting portion 512 ' when unlocked, and therefore, in practical applications, the supporting height of the supporting portion 512 ' can be adjusted by adjusting the depth of the supporting groove 514 '.

Referring to fig. 9C, the lock body 52 ' may include an insertion section 521 ' having an inclined guide surface, and when locking is performed, the insertion section 521 ' may be inserted from below the support portion 512 ' and may be supported with the inclined guide surface to the support portion 512 ' to gradually bring the support portion 512 ' to rotate upward, the locking portion 511 ' to rotate downward, and lock the receptacle.

The lock body 52 ' may only include the insertion section 521 ', and under such a condition, in the locked state, the lock body 52 ' may still support the inclined guide surface and the support portion 512 ', and in the unlocked state, the lock body 52 ' may be completely separated from the support portion 512 ', or the inclined guide surface and the support portion 512 ', that is, in the unlocked state, the lock body 52 ' may also be incompletely separated from the lock head 51 ', and at this time, the lock body 52 ' may also limit the rotation of the lock head 51 ', and since the lock head 51 ' is still on the lock body 52 ', there is no problem that the lock body 52 ' cannot be inserted, and the aforementioned first limiting portion 542 ' may also be absent.

In the embodiment of the drawings, still referring to fig. 9C, the lock body 52 'may include three parts, namely, a large-sized support section 523' with a larger vertical dimension, a vertically-variable-sized insertion section 521 ', and a small-sized support section 524' with a smaller vertical dimension, where the large-sized support section 523 'has a first support plane, and the small-sized support section 524' has a second support plane, and in the locked state, the lock body 52 'may be supported by the first support plane and the support portion 512', and in the unlocked state, the lock body 52 'may be supported by the second support plane and the support portion 512'.

Because the surface supporting the supporting part 512 'is a plane, the stability of the lock head 51' during unlocking and locking can be higher; based on the above design, the support portion 512 ' and the lock body 52 ' are not completely separated when unlocking, the small-sized support section 524 ' will naturally form a rotation limit for the support portion 512 ', and the first limit portion 542 ' may not exist.

As a variant of the solution of fig. 9C, the lock body 52 ' may also comprise only a large-sized support section 523 ' (or a small-sized support section 524 ') and an insertion section 521 ', which likewise enables the function of the lock body 52 '.

A guide structure may be provided between the lock body 52 ' and the rotation support body 54 ' for guiding a sliding direction of the lock body 52 '.

Specifically, one of the lock body 52 'and the rotary support body 54' may be provided with a sliding groove 522 ', and the other may be provided with a sliding portion that matches the sliding groove 522', and the sliding portion may be inserted into the sliding groove 522 'and may slide along the sliding groove 522'. The sliding part may be an integral structure, such as the elongated sliding rail 543' shown in the drawing, or may be a split structure, for example, may include a plurality of sliders arranged at intervals.

Further, the joint locking device can further comprise a second limiting part 55 'which is fixedly arranged, the second limiting part 55' can be fixed in the joint accommodating cavity 221b-2, and in a locking state, the second limiting part 55 'can be abutted against the supporting part 512' from top to bottom.

Therefore, in the locking state, the lock head 51 ' can form a scheme of three-point support, the stress of the lock head 51 ' is more balanced, and the lock head 51 ' can lock the support part more reliably; moreover, due to the interaction of the three force points, there is substantially no force action between the arc-shaped notch 513 'and the rotation shaft portion 541', which has a positive effect on ensuring the reliability of the locking mechanism.

Here, the embodiment of the present invention is not limited to the structure of the second stopper portion 55', and may be plate-shaped or block-shaped; similarly, the embodiment of the present invention also does not limit the number of the second position-limiting portions 55', and may include one position-limiting member or a plurality of position-limiting members independent of each other, as long as the above-described technical effects can be achieved.

Referring to fig. 5C in conjunction with fig. 2C and 3C, in an exemplary embodiment, the locking driving beam assembly 53 'may include a push beam 531', a guiding sleeve 532 ', and a connecting beam unit 533', the guiding sleeve 532 'may be fixedly disposed, and may be specifically installed in the joint accommodating cavity 221b-2 (see fig. 4C), the push beam 531' may be slidably connected to the guiding sleeve 532 ', one end of the connecting beam unit 533' is hinged to the push beam 531 ', and the other end is hinged to the lock body 52'.

With the structure, when the push beam 531 ' is driven to move upwards by the driving force, the connecting beam unit 533 ' can drive the lock body 52 ' to slide in the direction away from the lock head 51 ', and then the lock head 51 ' can rotate to unlock by itself; when the driving force disappears, the push beam 531 'can automatically slide down along the guiding sleeve 532' by means of its own gravity, etc., and the coupling beam unit 533 'drives the lock body 52' to slide toward the lock head 51 'to support the supporting portion 512' again, and the lock head 51 'can rotate in the reverse direction to realize automatic locking, or the external device can provide reverse driving force to drive the push beam 531' to reset and lock.

Specifically, the push beam 531 ' may face the knuckle first connection hole 321d (refer to fig. 2C and 3C) so that the unlocking member can contact the push beam 531 ' through the knuckle first connection hole 321d, thereby applying an upward unlocking driving force to the push beam 531 '.

It should be noted that the embodiment of the present invention does not limit the source of the driving force applied to the push beam 531 'during unlocking, and a manual driving scheme may be adopted, for example, an unlocking member such as an unlocking lever may be provided, and when unlocking is required, an operator may manually operate the unlocking member to generate the driving force to the push beam 531'; or, an automatic driving scheme may also be adopted, in this case, the power source may be a motor, an air cylinder, an oil cylinder, or the like, the power source may be mounted on the vehicle body, or may be mounted on the ground equipment, which may be specifically selected according to actual conditions, and a transmission mechanism may also be disposed between the power source and the push beam 531' to transmit the driving force of the power source.

The beam section of the push beam 531 'above the guiding sleeve 532' may further be provided with a connecting sleeve 531a ', as shown in fig. 6C, the connecting sleeve 531 a' may specifically include a tube portion and a hinge portion, the tube portion may be mounted on the upper portion of the push beam 531 'by means of screw connection, welding, interference fit, or the like, the hinge portion may include two hinge plates disposed oppositely, and the aforementioned connecting beam unit 533' may be hinged between the two hinge plates.

The connection sleeve 531a ' and the guiding sleeve 532 ' are combined together to act as a limiting member for the downward movement of the push beam 531 ', so as to limit the maximum downward movement distance of the push beam 531 ', and also limit the displacement distance of the lock body 52 '.

In fact, the downward movement limiting of the push beam 531 'can also be realized by the cooperation of the lock head 51' and the second limiting portion 55 ', and thus, the connection sleeve 531 a' may not exist; alternatively, the connecting end of the connecting beam unit 533 ' and the push beam 531 ' may be used for limiting, and the connecting end and the push beam 531 ' are hinged, and they are usually disposed at an included angle during the actual operation, so that the connecting end can also be used as a limiting component for the downward movement of the push beam 531 ' even though there is no connecting sleeve 531a '.

Further, a first elastic member 531b ' may be further included, one end of which may interact with the push beam 531 ', and in the unlocked state, the amount of deformation of the first elastic member 531b ' may be increased to gather the elastic force. With this arrangement, when the driving force applied to the push beam 531 'is removed, the elastic force of the first elastic member 531 b' can be released to cooperate with the gravity of the push beam 531 'to drive the reset and lock of the lock head 51' together.

Specifically, the first elastic member 531b 'may be a spring, which may be externally fitted to the push beam 531', and the lower end portion of the push beam 531 'may be provided with a support member 531 c', and both ends of the spring may respectively abut against the guide sleeve 532 'and the support member 531 c'. The push beam 531' can serve as a spring column, so that the radial movement of the spring in the stretching process can be prevented, and the positive effects of improving the structural stability and the power transmission reliability are achieved; with this structure, in the unlocked state, the push beam 531 'can be displaced upward and the first elastic member 531 b' can be compressed, and when the locking is restored, the push beam 531 'can be displaced downward and the first elastic member 531 b' can be released again.

In fact, in the locked state, the first elastic member 531b 'may also have a certain pre-compression amount, that is, the first elastic member 531 b' may still provide a certain elastic force when locked, which has a positive effect on ensuring the stability of the locked state of the locking head 51 ', and may avoid the automatic unlocking of the locking head 51' when the rail vehicle passes through a curve.

To conveniently adjust the pre-compression amount, the supporting member 531c 'may be a nut, so that the distance between the supporting member 531 c' and the guide sleeve 532 'can be adjusted by changing the screwing position of the nut, and thus the pre-compression amount of the first elastic member 531 b' in the locked state can be adjusted.

In the unlocked state, the first elastic member 531b 'may be actually in a stretched state, and the installation position of the first elastic member 531 b' may be changed, and in particular, it may be disposed between the connection sleeve 531a 'and the guide sleeve 532', and both ends thereof may be fixedly connected to the connection sleeve 531a 'and the guide sleeve 532' so as to transmit the pulling force.

The coupling beam unit 533 'may be a structure formed by combining a plurality of coupling beams, and in an exemplary scheme, the coupling beam unit 533' may include a first locking coupling beam 533a ', a second locking coupling beam 533 b', and a coupling block 533c ', and the coupling block 533 c' may be provided with a fixed hinge point 533c-1 ', a first hinge point 533 c-2', and a second hinge point 533c-3 'that are not collinear, the fixed hinge point 533 c-1' may be fixedly disposed, and may be fixed to the end coupling hook 221, one end of the first locking coupling beam 533a 'may be hinged to the push beam 531', and the other end may be hinged to the first hinge point 533c-2 ', and one end of the second locking coupling beam 533 b' may be hinged to the lock body 52 ', and the other end may be hinged to the second hinge point 533 c-3'.

With this structure, as shown in fig. 2C and fig. 3C, when the push beam 531 'moves upward, the first locking connecting beam 533 a' can be driven to move upward, then the connecting block 533C 'can be driven to rotate clockwise around the fixed hinge point 533C-1', and the second locking connecting beam 533b 'and the lock body 52' are driven by the connecting block 533C 'to move leftward, and the lock head 51' can rotate counterclockwise to unlock the bracket; when the push beam 531 ' moves downward, the first locking connecting beam 533a ' can be driven to move downward, then the switch block 533c ' can be driven to rotate counterclockwise, the second locking connecting beam 533b ' and the lock body 52 ' are driven by the switch block 533c ' to move rightward, and the lock head 51 ' can rotate clockwise to lock the bracket again.

It should be noted that the above description of the specific structure of the locking driving beam assembly 53 ' is only a preferred solution of the embodiment of the present invention, and is not intended to limit the scope of implementation of the locking mechanism provided by the present invention, and other types of locking driving beam assemblies 53 ' may be adopted if the function is satisfied, for example, the locking driving beam assembly 53 ' may be a beam directly configured to be linearly displaceable.

Further, the joint chassis section 3a is also provided with a lateral stop mechanism. When the support part 4 is reset from a position separated from the joint underframe 3 to a position connected with the joint underframe 3, the transverse stop mechanism can determine the reset position of the support part 4 so as to ensure that the support part 4 is accurately connected with the joint underframe 3.

Two lateral stop mechanisms are shown, a first lateral stop mechanism is shown in FIGS. 1D-6D, and a second lateral stop mechanism is shown in FIGS. 1E-6E. The two are described below one by one.

First transverse stopping mechanism

As shown in fig. 1D-3D, the lateral stop mechanism includes:

the support 61 is fixed on the joint connecting hook 321, and specifically can be fixed in a welding mode and the like, and the support 61 is provided with a through hole 611;

a stopper beam 62;

the stop driving beam assembly 63 is in transmission connection with the stop beam 62; in the blocking state, the blocking beam 62 can extend through the hole 611 to form a lateral stop for the bracket 4, and in the unblocking state, the blocking driving beam assembly 63 can drive the blocking beam 62 to retract to release the stop for the bracket 4.

With the structure, in the stopping state, the stopping beam 62 can extend out from the through hole 611 to form a transverse stopping for the support part 4, so that the accurate resetting of the support part 4 can be ensured; in the unlocked state, the stop driving beam assembly 63 can act on the stop beam 62 to retract the stop beam, so that the stop of the bracket 4 can be released, and the normal separation of the bracket 4 and the joint underframe 3 is not affected.

Further, a stopper elastic member 64 may be further included, and the stopper elastic member 64 may act on the stopper beam 62, and the amount of deformation of the stopper elastic member 64 may be increased during the shift-out process to gather the elastic force. Thus, when the driving force acting on the stopper driving beam assembly 63 is removed, the stopper elastic member 64 can be released to drive the stopper beam 62 to automatically return to the stopper position, which can improve the degree of automation of the apparatus.

Referring to fig. 3D, the stopper beam 62 may include a thick neck portion 621 and a thin neck portion 622, between which a step surface 623 may be formed, and the stopper elastic member 64 may be a spring, which may be externally fitted to the thin neck portion 622 and may interact with the step surface 623. At this moment, the thin neck portion 622 can also play a role of a spring column to guide the extension and retraction of the spring, so that the radial play of the spring in the extension and retraction process can be avoided to a greater extent, and the positive effect on improving the stability and the reliability of transmission is achieved.

It should be noted that, besides the solution of using a spring, the stop elastic member 64 may also use other forms of elastic elements such as an elastic ball, an elastic block, a tensile cord, etc., as long as the use effect can be satisfied.

The support 61 may further be provided with a limiting member 65, two ends of the stopping elastic member 64 may respectively interact with the limiting member 65 and the step surface 623, in the scheme of the drawing, the stopping beam 62 may have a thick neck 621 as a stopping portion to improve the strength of the stopping portion, and when the stopping is performed, the step surface 623 may generate a compression force on the stopping elastic member 64 to increase the compression amount of the stopping elastic member 64, in this scheme, the stopping elastic member 64 is in a contact relationship with the limiting member 65 and the step surface 623.

Moreover, the cross section of the thick neck 621 may be non-circular, and the through hole 611 may match with the thick neck 621, where the matching means that the shape and the size of the thick neck 621 and the through hole 611 are substantially the same, so that when the thick neck 621 is inserted into the through hole 611, the thick neck 621 does not rotate relatively, and the positioning reliability of the stopper may be improved. Further, the stop surface of the thick neck portion 621 contacting the holder portion 4 may be a flat surface, so that the contact area between the holder portion 4 and the stop surface may be larger, and the reliability of the stop may be improved to a greater extent.

In fact, during the gear releasing process, the stopper elastic element 64 may also generate a pulling force, in this case, the thin neck portion 622 of the stopper beam 62 may serve as a stopping portion contacting with the holder 4, and in this case, both ends of the stopper elastic element 64 need to be connected with the limiting element 65 and the step surface 623, so as to generate a pulling force during the gear releasing process.

The structure of the stopper 65 is not limited herein, and in the specific implementation, a person skilled in the art may set the stopper according to actual needs as long as the above-described effects can be achieved. For example, in the solution shown in fig. 3D, the limiting member 65 may be a sleeve, which may be a cylinder, a square cylinder, or a special-shaped cylinder with other shapes, and the sleeve may protect the spring to prevent rainwater, dust, etc. from entering into the spring to affect the normal operation of the spring; in the solution of fig. 6D, the position limiting member 65 may be a plate or a block, and may be connected to the support 61 through the upper cover plate 615, and at this time, the spring is in a relatively open space, and an operator may directly observe the spring to conveniently adjust the installation state of the spring.

Referring to fig. 4D, in practice, the embodiment of the present invention does not limit the structure of the support 61, and the structure is mainly to adapt to the connection with the knuckle connecting hook 321, in practical implementation, a person skilled in the art can adjust the shape of the support 61 according to the knuckle connecting hook 321, the support 61 needs to provide corresponding mounting points, one of the mounting points is the aforementioned through hole 611, and another mounting point, i.e., a mounting hole 612, is shown in the figure, and the mounting hole 612 can be used for mounting a brake pipe assembly (not shown in the figure) of the piggyback vehicle.

The stopping driving beam assembly 63 may include a first connecting beam 631 hinged to each other, one end of the first connecting beam 631 may be a driving end 6311 for receiving an external driving force, the other end may be a connecting end 6312, the first hinge shaft 633 of the first connecting beam 631 may be fixedly disposed, specifically, may be fixedly installed on the support 61 and located between the driving end 6311 and the connecting end 6312, and the connecting end 6312 may be in driving connection with the stopping beam 62.

Here, the embodiment of the present invention does not limit the source of the driving force received by the stop driving beam assembly 63 during the shift release, and a manual driving scheme may be adopted, for example, a shift release member such as a shift release lever may be provided, and when the shift release is required, the shift release member may be manually operated by a worker to generate the driving force to the driving end 6311; or, an automatic driving scheme may also be adopted, in this case, the power source may be a motor, an air cylinder, an oil cylinder, or the like, the power source may be mounted on the vehicle body, or may be mounted on the ground equipment, which may be specifically selected according to actual conditions, and a transmission mechanism may also be disposed between the power source and the driving end 6311 to transmit the driving force of the power source.

In one aspect, as shown in fig. 1D to 3D, the stop driving beam assembly 63 may further include a second connecting beam 632, one end of the second connecting beam 632 may be connected to the stop beam 62 by a screw connection or welding, and the other end of the second connecting beam may be connected to the connecting end 6312, one of the second connecting beam and the connecting end may be provided with a second hinge shaft 634, the other one of the second connecting beam and the connecting end may be provided with a strip-shaped guide hole 631a-1, and the second hinge shaft 634 may be inserted into the strip-shaped guide hole 631 a-1.

With this arrangement, the rotational movement of the connection end portion 6312 can be converted into the linear movement of the second link beam 632 by the engagement of the second hinge shaft 634 with the strip guide hole 631a-1, and the stopper beam 62 can be driven to extend or retract.

In the drawings, the strip guide hole 631a-1 may be formed at the connection end 6312, and the second hinge shaft 634 may be fixed to the second link beam 632, so that the second link beam 632 may be relatively small in size and compact in structure.

In particular practice, the spring may have a pre-compression amount to ensure the reliability of the stop beam 62 in the stop position, and the pre-compression amount may be adjusted by the connection position of the second connecting beam 632 and the stop beam 62.

Based on the scheme that the second coupling beam 632 is fixed to the stop beam 62 by means of threaded connection, a first anti-loosening element 624 may be further provided, and the first anti-loosening element 624 may be connected to the stop beam 62 and may abut against the second coupling beam 632 to fix the second coupling beam 632 in an anti-loosening manner. The first anti-loosening element 624 may be a lock nut, or may be an anti-loosening limiting element in the form of a slip, a stopper, or the like.

Further, a connecting plate 613 and a guard plate 614 may be further included, one end of the connecting plate 613 may be connected to the support 61, and the other end may be connected to the guard plate 614 for protecting the stopper driving beam assembly 63, and the aforementioned first hinge shaft 633 may be mounted on the connecting plate 613, and a specific mounting manner may be welding, or may be mounted by means of a mounting plate 633a and a bolt, as long as reliable fixing of the first hinge shaft 633 can be ensured. In practice, the connecting plate 613 and the guard plate 614 may be part of the support 61.

In another alternative, as shown in fig. 6D and 7D, the connecting end 6312 may be provided with a strip-shaped guide slot 631e, the stop beam 62 may be inserted into the strip-shaped guide slot 631e, and the connecting end 6312 may abut against a locking member 631f provided on the stop beam 62 to define a connecting position of the connecting end 6321 with the stop beam 62.

With this arrangement, the rotational movement of the connecting end portion 6312 can be converted into the linear movement of the stopper beam 62 by the engagement of the stopper beam 62 with the strip-shaped guide groove 631e, so that the stopper beam 62 is driven to perform the unlocking or the returning of the stopper.

In detail, the connecting end 6312 may be defined between the locker 631f and the stopper 65, the adjustment of the pre-compression amount of the stopper spring 64 may be determined by the installation position of the locker 631f on the stopper beam 62, and a spacer 631g may be further provided between the locker 631f and the connecting end 6312 to reduce the abrasion at the connection therebetween.

The locking member 631f and the stopping beam 62 may be connected by a screw, or may be welded, and when the locking member is connected by a screw, the locking member may further include a second anti-loosening member, and the second anti-loosening member may be a locknut, or may be a stopping insert (not shown in the drawings), a stopping block, or the like, for limiting the installation position of the locking member 631 f.

In comparison, the above two schemes can both realize the conversion from the rotational movement of the first connecting beam 631 to the linear movement of the stop beam 62, and can realize the switching between the stop state and the stop state of the stop beam 62, and in a specific application, a person skilled in the art can select the scheme according to actual needs.

Taking the first solution as an example, the first coupling beam 631 may include a long plate 631a and a short plate 631b that are disposed at an interval, the first hinge shaft 633 may be connected to both the long plate 631a and the short plate 631b, one end of the long plate 631a forms the connection end 6312, the strip-shaped guide hole 631a-1 may be disposed on the long plate 631a, and a roller 631c may be connected between the other end of the long plate 631a and the short plate 631b, where the long plate 631a, the short plate 631b, and the roller 631c are combined together to form the driving end 6311.

When an external driving force acts on the roller 631c, the roller 631c can rotate, which can reduce the friction between the driving end 6311 and an external driving device, and has a positive effect on reducing the wear of the driving end 6311.

Referring to fig. 5D, a roller 631D may be further included, the roller 631D may include a rod 631D-1 and a head 631D-2, the head 631D-2 may have a radial dimension larger than that of the rod 631D-1, the long plate 631a and the short plate 631b may each have a through hole 631b-1, the through hole 631b-1 of one of the two inside may be a stepped hole, at least a portion of the head 631D-2 may be hidden in a large diameter hole section of the stepped hole in an assembled state, and an end of the rod 631D-1 away from the head 631D-2 may be cooperatively locked with the locking nut 631D-3.

Here, the "inner side" means a side close to the joint hook 321, and with this design, the length of the roller 631d protruding from the inner side can be made short, and contact friction with the joint hook 321 when the driving end 6311 rotates can be avoided to a large extent.

In the above solutions, the recovery stopping of the stopping beam 62 mainly depends on the stopping elastic member 64 directly acting with the stopping beam 62, and in fact, besides this solution, the stopping beam 62 may also be driven to recover the stopping state by the stopping driving beam assembly 63, that is, both the stopping and recovering stopping of the stopping beam 62 may be accomplished by the stopping driving beam assembly 63, and this solution may be implemented by providing an elastic member for the stopping driving beam assembly 63.

In addition, one core of the transverse stopping mechanism provided by the invention lies in the separation of the stopping driving beam assembly 63 and the stopping beam 62, in the stopping state, only the stopping beam 62 and the support 61 are stressed, and the stopping driving beam assembly 63 for participating in driving is not stressed, which is a key point of higher reliability of the transverse stopping mechanism provided by the invention.

Second transverse stopping mechanism

As shown in fig. 2E and 4E-6E, the lateral stop mechanism 6' includes:

a stop beam 61 ' hingedly arranged, the two ends of the stop beam 61 ' being a driving end 611 ' and a stopping end 612 ', respectively, the hinge axis 613 ' of the stop beam 61 ' being located between the driving end 611 ' and the stopping end 612 ', and the hinge axis 613 ' being fixed to the articulation hook 321;

a limit beam 62' fixed to the knuckle coupling hook 321;

in the stopping state, the limiting beam 62 ' is abutted against the outer side of the stopping beam 61 ' along the transverse direction, and the stopping beam 61 ' can form a transverse stopping for the support part 4; in the disengaged state, the driving end 611 'is forced to rotate to drive the stopping end 612' to release the stop for the holder 4.

By adopting the structure, in the stopping state, the limit beam 62 'can be abutted against the stop beam 61' along the transverse direction so as to provide the transverse supporting force for the stop beam 61 ', and then the stop beam 61' forms transverse stopping for the support part 4, so that the accurate resetting of the support part 4 can be ensured; in the gear-releasing state, the driving end 611 ' can be stressed to drive the whole stop beam 61 ' to rotate, and further the stop end 612 ' can be driven to rotate to release the stop, so that the normal separation of the support part 4 and the joint underframe 3 is not affected.

More importantly, in the stopping state, when the supporting part 4 resets and hits the stopping beam 61 ', only the stopping end part 612' and the limiting beam 62 'are stressed, and the driving end part 611' which is the moving part of the transverse stopping mechanism is not stressed, which has a key effect on ensuring the reliability of the transverse stopping mechanism provided by the invention.

It should be noted that the embodiment of the present invention does not limit the source of the driving force received by the driving end 611 'during the gear shifting, and a manual driving scheme may be adopted, for example, a gear shifting component such as a gear shifting lever may be provided, and when the gear shifting is required, the gear shifting component may be manually operated by a worker to generate the driving force for the driving end 611'; or, an automatic driving scheme may also be adopted, in this case, the power source may be a motor, an air cylinder, an oil cylinder, or the like, the power source may be mounted on the vehicle body, or may be mounted on the ground equipment, which may be specifically selected according to actual conditions, and a transmission mechanism may also be disposed between the power source and the driving end portion 611' to transmit the driving force of the power source.

Further, the hinge device may further include a first limiting member 63 ', wherein the first limiting member 63 ' is fixed to the joint connecting hook 321, and in the unlocking state, the stop beam 61 ' may abut against the first limiting member 63 ', so as to avoid an excessive rotation of the stop beam 61 '.

Here, the shape of the first limiting member 63' is not limited in the embodiment of the present invention, and may be a plate shape, a block shape, a column shape, or the like, and may be specifically determined according to actual situations; similarly, the embodiment of the present invention does not limit the number and the installation positions of the first stoppers 63', as long as the above-described effects can be achieved. In an exemplary embodiment of the present invention, the first retaining member 63 'may be formed by extending the knuckle hook wall 221c of the knuckle connection hook 321, so that the first retaining member 63' is not required to be specially provided, and the number of parts may be reduced.

In the disengaged state, i.e. when the stop beam 61 ' abuts against the first stop member 63 ', the center of gravity of the stop beam 61 ' may be longitudinally offset from the hinge axis 613 ' and located on the side of the stop end 612 '. Thus, when the driving force acting on the driving end 611 ' is removed, the stopper beam 61 ' can be automatically rotated to the stopper state by the gravity of the stopper beam 61 ' itself without providing another driving part, and the structure of the apparatus can be simplified.

And/or, a stopper elastic member 65 'may be further included, and the stopper elastic member 65' may act on the stopper beam 61 ', and the amount of deformation of the stopper elastic member 65' may be increased during the shift-releasing process to accumulate the elastic force. Thus, when the driving force acting on the driving end 611 ' is removed, the elastic force accumulated by the stopper elastic member 65 ' can be released to cooperatively drive the stopper beam 61 ' to rotate back to the stopper state by itself or in cooperation with the aforementioned gravity.

The stopper elastic member 65 'may be a torsion spring, which is externally sleeved on the hinge shaft 613', and has two extending ends, one of which may be fixed (or may be abutted against a fixed member, such as the joint coupling hook 321), and the other of which may be abutted against the stopper beam 61 ', and when the stopper beam 61' rotates to release the stopper state, the torsion spring may gather a torsional deformation force, and when the driving force applied to the driving end 611 'is removed, the torsional deformation force may be released to drive the stopper beam 61' to automatically rotate.

The stopper elastic member 65 ' may be a linear spring, such as a tension spring, a compression spring, or a spring element that generates an elastic force by an axial displacement, and as an example, in the embodiment shown in fig. 4E, the linear spring may be a tension spring, one end of which may be fixed and the other end of which may be connected to the stopper beam 61 ', so that the elastic force may be accumulated when the stopper beam 61 ' is rotated to release the stopper.

In addition to the above-mentioned torsion spring and linear spring, the stopping elastic member 65' may also be an elastic element in the form of an elastic block, an elastic ball, a tensile cord, or the like, as long as the above-mentioned technical effects can be achieved.

Furthermore, a second limiting member 64 ' may be further included, the second limiting member 64 ' is fixed to the articulation hook 321, and in the stopping state, the stopping beam 61 ' may abut against the second limiting member 64 ' to limit the position of the stopping beam 61 ' in the stopping state. The second limiting members 64 'may be similar in structure, number and installation position to the first limiting members 63', and will not be described repeatedly.

Moreover, by the support of the second limiting member 64 ', the stop beam 61 ' and the limit beam 62 ' can be arranged with a gap in the vertical direction, so that the limit beam 62 ' does not need to bear the gravity of the stop beam 61 ', accordingly, the connection between the limit beam 62 ' and the joint connecting hook 321 does not generate shear stress, and the connection reliability between the limit beam 62 ' and the joint connecting hook 321 can be high.

With respect to the lateral stopper mechanism 6 'of the bracket 4 according to each of the above embodiments, the structure of the stopper beam 61' will be described in the following embodiments of the present invention.

Referring to fig. 2E, in the stopping state, the driving end 611 ' may be an end gradually inclined from top to bottom toward the stopping end 612 ', so that when the driving end 611 ' receives an upward driving force, the stopping beam 61 ' will naturally rotate toward the direction of releasing the stopping state, so as to ensure that the stopping beam 61 ' can be smoothly unlocked.

It is understood that adjusting the shape of the driving end 611 ' actually adjusts the driving force and the acting direction of the driving end 611 ', so that the rotational unlocking of the stopper beam 61 ' can be realized by adjusting the direction of the driving force in specific implementation.

In the stopping state, a bent corner bent downward may be provided at an end of the stopper beam 61 'away from the driving end 611', and the bent corner may serve as the stopper end 612 ', and the bent corner may be provided to increase the strength of the stopper end 612' and to avoid the vehicle body and the brake pipe guard (not shown).

Referring to fig. 6E again, the hinge axis 613 ' of the stop beam 61 ' may be a stepped axis, and specifically may include a large diameter section 613a ' and a small diameter section 613b ', wherein the large diameter section 613a ' may be used to connect with the articulation hook 321, and the stop beam 61 ' may be installed on the large diameter section 613a '; a third limiting member 613c 'may be further included, and the third limiting member 613 c' may be specifically a nut, which may be mounted to the small diameter section 613b 'to cooperate with the articulation hook 321 to define the mounting position of the stop beam 61'. It should be understood that the third limiting element 613c 'mainly serves to limit the rotation of the stop beam 61' and is not locked, so as to ensure smooth rotation after the installation.

A gasket 613d 'may be further disposed between the third limiting member 613 c' and the stop beam 61 ', and the gasket 613 d' may be made of rubber, metal, or the like, so as to avoid direct friction between the stop beam 61 'and the third limiting member 613 c', and have a positive effect on reducing wear.

The joint underframe of the piggyback car provided by the invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims

1. The joint underframe of the piggyback car is characterized in that the joint underframe (3) comprises a joint underframe subsection (3a), and the joint underframe subsection (3a) comprises a joint underframe body (31), a joint connecting mechanism (32) fixed at the rear end of the joint underframe body (31) and a joint (33) fixed at the front end of the joint underframe body (31); the joint (33) is connected with the joint (33) of the other joint underframe subsection (3a) through a joint bearing (34), and in a connection state, the two joint underframe subsections (3a) can rotate around the transverse direction and the vertical direction; the opening of the joint connecting hook (321) faces upwards, the inner hook surface of the joint connecting hook (321) is provided with a joint groove (321a) extending along the transverse direction, and the joint groove (321a) is used for placing and upwards supporting the lower circular shaft (412c) of the piggyback car support part (4).

2. The articulating chassis of claim 1, wherein the articulating mechanism (32) further comprises:

an articulated longitudinal support (322), the articulated longitudinal support (322) being located above the articulated hook (321); the joint longitudinal supporting piece (322) comprises a joint longitudinal supporting main body (322a) and a joint wearing plate (322b) fixed at the front end and the rear end of the joint longitudinal supporting main body (322a), the joint longitudinal supporting main body (322a) is used for hooking an upper hook (421) of the support part (4) with a downward hook opening, under the hooking state of the joint longitudinal supporting main body and the upper hook, the joint wearing plate (322b) at the front end is abutted against the front side of an inner hook surface of the upper hook (421), and the joint wearing plate (322b) at the rear end is abutted against the rear side of the inner hook surface of the upper hook (421).

3. The joint chassis according to claim 2, wherein the upper portion of the joint wear plate (322b) at the front end is inclined rearward relative to the lower portion, and the upper portion of the joint wear plate (322b) at the rear end is inclined forward relative to the lower portion; and the inner surface of the joint groove (321a) forms a joint guide surface which is matched with the lower round shaft (412c) to guide the joint chassis part (3a) to rotate around the transverse direction.

4. The articulating chassis of claim 3, wherein the articulating mechanism (32) further comprises:

a joint lateral stop (323), the joint lateral stop (323) being located above the joint connection hook (321) and in front of the joint longitudinal support (322); the transverse joint limiting part (323) comprises a transverse joint limiting groove (323a), the transverse joint limiting groove (323a) is used for being plugged with the guide limiting part (422) of the support part (4), and under the plugging state of the transverse joint limiting groove and the guide limiting part, the left groove wall and the right groove wall of the transverse joint limiting groove (323a) are respectively positioned on the left side and the right side of the guide limiting part (422) so as to limit the transverse position of the guide limiting part (422).

5. The joint chassis according to claim 4, wherein left and right groove wall upper portions of the joint lateral limitation groove (323a) form left and right guide surfaces (323b, 323c), respectively, for guiding the guide limit piece (422) into the joint lateral limitation groove (323a), an upper side of the left guide surface (323b) being inclined to the left with respect to a lower side, and an upper side of the right guide surface (323c) being inclined to the right with respect to a lower side.

6. The joint chassis according to claim 1, characterized in that said joint chassis body (31) comprises: a first joint cross beam (3101), a second joint cross beam (3102), a third joint cross beam (3103), a first joint longitudinal beam (3104), a second joint longitudinal beam (3105), a joint traction beam (3106), a first joint floor (3107) and a second joint floor (3108);

the first joint cross beam (3101) is arranged behind the second joint cross beam (3102) and the third joint cross beam (3103), the left end of the first joint cross beam (3101) is fixed with the left end of the second joint cross beam (3102) through the first joint longitudinal beam (3104), the right end of the first joint cross beam (3101) is fixed with the right end of the third joint cross beam (3103) through the second joint longitudinal beam (3105), and the right end of the second joint cross beam (3102) and the left end of the third joint cross beam (3103) are respectively fixed with the front end of the joint traction beam (3106), so that a joint frame is formed; the rear end of the joint traction beam (3106) is fixed on the first joint cross beam (3101); the joint (33) is fixed at the front end of the joint traction beam (3106);

the first joint floor (3107) and the second joint floor (3108) are covered on a top frame opening of the joint frame and are respectively positioned at the left side and the right side of the joint traction beam (3106), the first joint floor (3107) is fixed on the second joint cross beam (3102), the first joint longitudinal beam (3104) and the joint traction beam (3106), and the second joint floor (3108) is fixed on the third joint cross beam (3103), the second joint longitudinal beam (3105) and the joint traction beam (3106).

7. The joint underframe according to claim 6, characterized in that the joint underframe body (31) further comprises two joint side bearings (3109), wherein the two joint side bearings (3109) are respectively located at the left and right sides of the joint (33), one joint side bearing (3109) is fixed at the front side of the second joint crossbeam (3102), and the other joint side bearing (3109) is fixed at the front side of the third joint crossbeam (3103).

8. The joint chassis according to claim 6, wherein the joint chassis body (31) further comprises two sets of stiffening plate members (3110), one set of stiffening plate members (3110) being fixed between the first joint floor (3107) and the first joint beam (3101), the other set of stiffening plate members (3110) being fixed between the second joint floor (3108) and the first joint beam (3101).

9. The joint chassis according to any of claims 1-8, characterized in that the joint chassis section (3a) further comprises a locking mechanism; the joint connecting hook (321) comprises a joint hook main body (321b), the joint hook main body (321b) comprises two joint hook split bodies (321b-1) arranged at intervals in the transverse direction and a joint accommodating cavity (321b-2) formed between the two joint hook split bodies (321b-1), and the joint accommodating cavity (321b-2) is used for installing the locking mechanism.

10. The knuckle chassis according to claim 9, wherein the knuckle coupling hook (321) further comprises a knuckle hook wall plate (321c) covering an outer hook surface of the knuckle hook body (321b), the knuckle hook wall plate (321c) is provided with a knuckle first connection hole (321d), and the knuckle first connection hole (321d) is communicated with the knuckle accommodation cavity (321b-2) so that an unlocking member can extend into the knuckle accommodation cavity (321b-2) through the knuckle first connection hole (321d) to unlock the locking mechanism.

11. The joint chassis according to claim 9, characterized in that said locking mechanism (5) comprises:

the lock body (51) is hinged to the joint connecting hook (321), one end of the lock body (51) is a locking end part (511), the other end of the lock body is a first limiting end part (512), and a hinge shaft (52) of the lock body (51) is located between the locking end part (511) and the first limiting end part (512);

the first limiting part (53), the first limiting part (53) is fixed in the joint accommodating cavity (321 b-2);

a locking actuation beam assembly (54) coupled to the lock body (51);

in a locking state, the first limiting end part (512) abuts against the first limiting part (53) from top to bottom, and the locking end part (511) abuts against the support part (4) to lock the support part (4); in an unlocking state, the locking driving beam assembly (54) can drive the first limiting end part (512) to be separated from the first limiting part (53) from bottom to top, and the locking end part (511) is rotatably separated from the support part (4).

12. The articulating chassis of claim 11, wherein said locking actuation beam assembly (54) comprises a push beam (541), a guide sleeve (542), and a drive beam (543), said guide sleeve (542) being secured within said joint receiving cavity (321b-2), said push beam (541) being slidably connected to said guide sleeve (542), said drive beam (543) being hingedly connected at one end to said lock body (51) and at the other end to said push beam (541).

13. The joint chassis according to claim 11, wherein the locking mechanism (5) further comprises a second limiting portion (55), the second limiting portion (55) is fixed in the joint accommodating cavity (321b-2), the lock body (51) further comprises a second limiting end portion (514), and the second limiting end portion (514) abuts against the second limiting portion (55) from bottom to top in the locking state.

14. The joint chassis according to claim 9, characterized in that said locking mechanism (5') comprises:

a lock head (51 '), the lock head (51 ') being rotatably coupled to the knuckle coupling hook (321), the lock head (51 ') being provided with a locking portion (511 ') and a supporting portion (512 ') at both sides of a rotation center line thereof, respectively;

a lock body (52 '), said lock body (52') slidably coupled to said articulation hook (321);

a locking driving beam assembly (53 ') which is connected with the lock body (52') in a transmission way and is connected with the lock body (51);

in a locked state, the lock body (52 ') is supported by the support portion (512 ') from bottom to top so that the locking portion (511 ') presses the receiving portion (4); in an unlocked state, the locking driving beam assembly (53 ') can drive the lock body (52 ') to displace in a direction away from the lock head (51 '), and the support portion (512 ') can rotate downwards around the rotation center line, so that the locking portion (511 ') rotates upwards to be separated from the support portion (4).

15. The articulating chassis of claim 14, wherein said locking actuation beam assembly (53 ') includes a push beam (531'), a guide sleeve (532 '), and a link beam unit (533'), said guide sleeve (532 ') being fixed within said articulation receiving cavity (321b-2), said push beam (531') being slidably connected to said guide sleeve (532 '), one end of said link beam unit (533') being hinged to said push beam (531 ') and the other end being hinged to said lock body (52').

16. The joint chassis according to claim 14, wherein the locking mechanism (5 ') further comprises a rotation support body (54'), the rotation support body (54 ') is fixed to the joint coupling hook (321), the rotation support body (54') is provided with a rotation shaft portion (541 '), the rotation shaft portion (541') has an arc-shaped cylindrical surface, the lock head (51) is provided with an arc-shaped notch (513 ') matching with the rotation shaft portion (541'), and the lock head (51 ') is inserted into the rotation shaft portion (541') with the arc-shaped notch (513 ') and can use the central axis of the rotation shaft portion (541') as the rotation center line.

17. The joint chassis according to claim 14, wherein the locking mechanism (5 ') further comprises a second limiting portion (55 '), the second limiting portion (55 ') being fixed in the joint accommodating cavity (321b-2), the second limiting portion (55 ') being capable of abutting against the support portion (512 ') from top to bottom in the locked state.

18. The joint chassis according to any of the claims 1-8, characterized in that the joint chassis section (3a) further comprises a lateral stop mechanism (6), the lateral stop mechanism (6) comprising:

the support (61), the support (61) is fixed on the joint connecting hook (321), and the support (61) is provided with a through hole (611);

a stopper beam (62);

the stop driving beam assembly (63) is in transmission connection with the stop beam (62);

in the stopping state, the stopping beam (62) extends out of the through hole (611) to form a transverse stopping for the support part (4); in the gear-releasing state, the stop driving beam assembly (63) can drive the stop beam (62) to retract so as to release the stop of the support part (4).

19. The joint chassis according to any of claims 1-8, characterized in that the joint chassis section (3a) further comprises a lateral stop mechanism (6 '), the lateral stop mechanism (6') comprising:

a stop beam (61 ') hingedly arranged, the two ends of the stop beam (61 ') being a drive end (611 ') and a stop end (612 '), respectively, the hinge axis (613 ') of the stop beam (61 ') being located between the drive end (611 ') and the stop end (612 '), and the hinge axis (613 ') being fixed to the articulated hook (321);

the limiting beam (62') is fixed on the joint connecting hook (321);

in the stopping state, the limiting beam (62 ') is propped against the outer side of the stopping beam (61 ') along the transverse direction, and the stopping beam (61 ') can form a transverse stopping for the support part (4); in the gear-releasing state, the driving end (611 ') is forced to rotate so as to drive the stopping end (612') to release the stopping of the support part (4).

20. The joint chassis according to claim 19, wherein the lateral stop mechanism (6 ') further comprises a first stop member (63 ') and a second stop member (64 '), both the first stop member (63 ') and the second stop member (64 ') being fixed to the joint coupling hook (321), the stop beam (61 ') abutting against the first stop member (63 ') in the disengaged state, and the stop beam (61 ') abutting against the second stop member (64 ') in the stopped state.