piggyback vehicle

Abstract

The present application discloses a piggyback transport vehicle, comprising: a vehicle body for carrying a semitrailer compartment; a saddle slidingly arranged on the top of the vehicle body for engaging with a semitrailer draw pin, the saddle comprising a seat plate, the seat plate being provided with an engaging groove near one side of the semitrailer for clamping the semitrailer draw pin. The present application hoists the semitrailer compartment into the vehicle body by a crane, drives the walking mechanism to move the previously moved saddle to the side near the semitrailer draw pin, until the semitrailer draw pin moves into the engaging groove and is blocked by the stop component, then drives the cutting mechanism to stop driving the sliding component, thereby fixing the position of the saddle. When facing semitrailers of different lengths, the piggyback transport vehicle only needs to set a fixed running time for the driving component, which can ensure the connection between the saddle and the draw pin of semitrailers of different lengths, achieving the purpose of improving loading efficiency.

Description

Technical Field

[0001] This invention relates to the field of railway freight technology, and more particularly to piggyback transport vehicles. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] When power plants are being built or maintained, it is often necessary to transport large equipment such as generators, transformers, and heavy machinery. The size and weight of these devices often exceed the capabilities of ordinary transport vehicles. Using piggyback transport vehicles can reduce the time that the equipment spends on the road, reduce road damage, improve transport efficiency, and also reduce energy consumption during transport, making it more environmentally friendly.

[0004] Currently, after a piggyback transport vehicle receives a semi-trailer, it needs to position the semi-trailer to prevent collisions between the semi-trailer and the piggyback transport vehicle during rail transport due to longitudinal movement, which could affect driving safety. In existing technology, the wheels are usually fixed first, and then the semi-trailer's towing pin is also locked by a movable saddle. However, because the length of the semi-trailer's cargo box varies, the movable saddle needs to be manually adjusted according to the length of the cargo box. However, due to the positional error of the semi-trailer's cargo box during hoisting and the positional error of the movable saddle during manual adjustment, a lot of time is required for the semi-trailer's towing pin to be aligned each time it is docked with the movable saddle, which affects the loading rate of subsequent vehicles. Summary of the Invention

[0005] The purpose of this invention is to address the aforementioned shortcomings by providing a piggyback transport vehicle that enables the movable saddle to be quickly connected and locked with the semi-trailer's towing pin, thereby improving loading efficiency.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a piggyback transport vehicle, comprising:

[0007] The vehicle body is used to carry the semi-trailer trailer.

[0008] The saddle is slidably mounted on the top of the vehicle body and is used to engage with the semi-trailer's towing pin. The saddle includes a seat plate, and the seat plate has an engagement groove on the side near the semi-trailer for the semi-trailer's towing pin to engage. The seat plate is provided with a backstop component for sealing the engagement groove after the semi-trailer's towing pin is engaged in the engagement groove.

[0009] A traveling mechanism for driving the saddle to move toward and away from the semi-trailer towing pin, the traveling mechanism including a sliding assembly disposed on the top of the vehicle body and a driving assembly for driving the sliding assembly to move toward and away from the semi-trailer towing pin.

[0010] The drive-cutting mechanism, mounted on the saddle, is used to cut off the drive of the drive assembly to the sliding assembly after the saddle is engaged with the semi-trailer traction pin.

[0011] Furthermore, the anti-reverse assembly includes at least one anti-reverse rod disposed on the seat plate. One end of the anti-reverse rod is inserted into the engagement groove, and the other end passes through the seat plate and extends towards the side of the seat plate closer to the width of the vehicle body. A collar is fixedly disposed at the end of the anti-reverse rod away from the engagement groove. A tension spring is disposed between the collar and the seat plate. When the tension spring is in its natural state, the anti-reverse rod is located within the movement area of ​​the semi-trailer towing pin.

[0012] Furthermore, there are two anti-reverse rods, and the two anti-reverse rods are respectively disposed on both sides of the seat plate. The seat plate is provided with a first synchronization mechanism for moving the two anti-reverse rods out of and into the engagement groove simultaneously.

[0013] Furthermore, the first synchronization mechanism includes two sliding plates located inside the seat plate. The two sliding plates are respectively sleeved on two anti-reverse rods through bearings. The seat plate has a groove for the sliding plates to move with the anti-reverse rods. A connecting rod is rotatably mounted on the sliding plate. The ends of the two connecting rods away from the sliding plates are rotatably connected to each other. The seat plate has a movable groove for the connecting rods to move.

[0014] Furthermore, L-shaped positioning rods are provided on both sides of the seat plate near the width direction of the vehicle body. The L-shaped positioning rod consists of a vertical section connected to the seat plate and a horizontal section connected to the vertical section. A positioning block is provided on the collar. A groove is opened on the side of the horizontal section away from the seat plate for the positioning block to be inserted, so that the anti-reverse rod can be moved out of the engagement groove and then the corresponding positioning block can be rotated and inserted.

[0015] Furthermore, the sliding assembly includes two guide rails disposed on the top of the vehicle body and two upright plates located between the two guide rails. A screw is fixedly disposed between the two upright plates, and a slide table located on the top of the screw is slidably disposed between the two guide rails. Multiple support components are disposed between the slide table and the seat plate to enable the seat plate to move synchronously with the slide table. A side plate is disposed on the top of the slide table, and a central shaft passing through the side plate is fixedly disposed on the side plate. A driven plate is disposed near the end of the central shaft close to the drive assembly. The driven plate is slidably disposed on the central shaft and rotates relative to the central shaft. Teeth are disposed on the outside of the driven plate. A compression spring is disposed between the driven plate and the side plate. A threaded sleeve that meshes with the driven plate is threadedly connected to the screw.

[0016] The drive assembly includes a motor and a drive plate disposed at the output end of the motor. The driven plate and the drive plate are provided with protrusions on opposite sides. When the compression spring is in its natural state, the protrusion of the driven plate is located within the rotation area of ​​the protrusion of the drive plate.

[0017] Furthermore, the drive cutting mechanism includes two pressure blocks disposed within the seat plate and movable along the length of the vehicle body. A lever is slidably disposed on the side of the pressure block away from the engagement groove, penetrating the seat plate and inserted into the driven plate. The driven plate has an annular groove for inserting the lever. A spring is disposed between the lever and the corresponding pressure block. When the spring is in its natural state, the bottom end of the lever is located within the annular groove. When the spring is compressed to its minimum state, the lever is located outside the annular groove. The drive cutting mechanism also includes an inner toothed sleeve sleeved on and meshing with the anti-reverse rod. The inner toothed sleeve is rotatably disposed within the seat plate via a bearing. A pull rope is disposed between the lever and the inner toothed sleeve. When the anti-reverse rod is rotated and the positioning block is engaged in the recess, the inner toothed sleeve winds up the pull rope and pulls the lever to move it outside the annular groove.

[0018] Furthermore, a second synchronization mechanism is provided between the two levers for causing the two levers to move in opposite directions. The second synchronization mechanism includes a gear rotatably disposed in the base plate and two racks disposed on the upper and lower sides of the gear. The two racks are respectively connected to the opposite side of the two levers and are both engaged with the gear.

[0019] The beneficial effects of this invention are reflected in:

[0020] This invention uses a crane to lift the semi-trailer cargo box into the vehicle body for placement. The traveling mechanism then drives the saddle, which has been moved to one side, to move closer to the semi-trailer's towing pin until the towing pin enters the engagement groove and is blocked by the anti-reverse component. Subsequently, with the cooperation of the drive cutting mechanism, the drive component stops driving the sliding component, thereby fixing the position of the saddle. This allows the piggyback transport vehicle to maintain the connection between the saddle and the towing pin of semi-trailers of different lengths by simply setting a fixed running time for the drive component, thus improving loading efficiency. Attached Figure Description

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram showing the connection between the saddle and the walking mechanism of the present invention;

[0023] Figure 3 for Figure 2 A magnified view of a portion at point A shown;

[0024] Figure 4 This is a partial cross-sectional view of the sliding component of the present invention;

[0025] Figure 5 This is a partial cross-sectional view of the saddle of the present invention;

[0026] Figure 6 for Figure 5A magnified view of a portion of point B is shown below;

[0027] Figure 7 This is a schematic diagram showing the connection between the second synchronization mechanism and the lever of the present invention.

[0028] In the picture:

[0029] 1. Car body; 2. Saddle; 21. Seat plate; 22. Anti-reverse assembly; 221. Anti-reverse rod; 222. Collar; 223. Tension spring; 3. Traveling mechanism; 31. Sliding assembly; 311. Guide rail; 312. Vertical plate; 313. Screw; 314. Slide table; 315. Side plate; 316. Central shaft; 317. Driven disc; 318. Compression spring; 319. Screw sleeve; 32. Drive assembly; 321. Motor; 322. Drive disc; 4. Drive cutting mechanism; 41. Pressure block; 42. L-shaped lever; 43. Spring; 44. Internal gear sleeve; 45. Pull rope; 5. First synchronization mechanism; 51. Slide plate; 52. Connecting rod; 6. L-shaped positioning rod; 7. Second synchronization mechanism. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Please see Figure 1-7 This invention discloses a piggyback transport vehicle, comprising:

[0032] Vehicle body 1, used to carry the semi-trailer cargo box;

[0033] The saddle 2 is slidably disposed on the top of the vehicle body 1 for engaging with the semi-trailer towing pin. The saddle 2 includes a seat plate 21. The seat plate 21 has an engagement groove on the side near the semi-trailer for the semi-trailer towing pin to be inserted into. The seat plate 21 is provided with a backstop component 22 for sealing the engagement groove after the semi-trailer towing pin is inserted into the engagement groove.

[0034] The traveling mechanism 3 is used to drive the saddle 2 to move closer to and away from the semi-trailer towing pin. The traveling mechanism 3 includes a sliding component 31 disposed on the top of the vehicle body 1 and a driving component 32 for driving the sliding component 31 to move closer to and away from the semi-trailer towing pin.

[0035] The drive cutting mechanism 4 is mounted on the saddle 2 and is used to cut off the drive of the drive assembly 32 to the sliding assembly 31 after the saddle 2 is engaged with the semi-trailer traction pin.

[0036] This invention uses a crane to lift the semi-trailer trailer into the vehicle body 1 and place it there. The traveling mechanism 3 drives the saddle 2, which has been moved to one side, to move closer to the semi-trailer's towing pin until the towing pin enters the engagement groove and is blocked by the anti-reverse component 22. Then, with the cooperation of the drive cutting mechanism 4, the drive component 32 stops driving the sliding component 31, thereby fixing the position of the saddle 2. This allows the piggyback transport vehicle to maintain the connection between the saddle 2 and the towing pin of semi-trailers of different lengths by simply setting a fixed running time for the drive component 32, thus improving loading efficiency.

[0037] It should be noted that the drive assembly 32 can be remotely switched on and off, or it can be manually switched off after the semi-trailer cargo box has been tethered.

[0038] In practice, before locking the saddle 2, the wheels of the semi-trailer cargo box need to be positioned by the wheel stopper. In order to facilitate the insertion and removal of the wheel stopper from the vehicle body 1, multiple hollow holes are provided on one side of the vehicle body 1 in the width direction.

[0039] In one embodiment, the width of the engagement groove is greater than the outer diameter of the semi-trailer traction pin, so that the saddle 2 can engage with the offset semi-trailer traction pin during movement, reducing the alignment difficulty of the preceding hoisting operation. The anti-reverse assembly 22 includes at least one anti-reverse rod 221 disposed on the seat plate 21. One end of the anti-reverse rod 221 is inserted into the engagement groove, and the other end passes through the seat plate 21 and extends towards the side of the seat plate 21 closer to the width direction of the vehicle body 1. The anti-reverse rod 221 is provided with an inclined surface on the side closer to the semi-trailer, which is used to push the anti-reverse rod 221 out of the engagement groove after the semi-trailer traction pin abuts against the inclined surface, so that the semi-trailer traction pin can enter the engagement groove. A collar 222 is fixedly disposed at the end of the anti-reverse rod 221 away from the engagement groove. A tension spring 223 is disposed between the collar 222 and the seat plate 21. When the tension spring 223 is in its natural state, the anti-reverse rod 221 is located in the movement area of ​​the semi-trailer traction pin.

[0040] This design allows the anti-reverse lever 221 to automatically move out of the engagement groove after being pushed by the semi-trailer's towing pin, so that the semi-trailer's towing pin first moves into the semi-trailer's towing pin, and then can be reset under the pull of the tension spring 223. The semi-trailer's towing pin can be locked without manual operation.

[0041] It should be noted that, in order to facilitate manual pulling of the anti-reverse lever 221, a pull ring is provided at the end of the anti-reverse lever 221 away from the engagement groove.

[0042] In one embodiment, there are two anti-reverse rods 221, and the two anti-reverse rods 221 are respectively disposed on both sides of the seat plate 21. The seat plate 21 is provided with a first synchronization mechanism 5 for moving the two anti-reverse rods 221 out of and into the engagement groove simultaneously.

[0043] This design allows operators to release the blockage on the semi-trailer's towing pin by pulling the nearest anti-reverse lever 221 when approaching the piggyback transport vehicle from different platform directions.

[0044] It should be noted that the maximum distance between the pull rings corresponding to the two anti-reverse levers 221 does not exceed the railway clearance.

[0045] In one embodiment, the first synchronization mechanism 5 includes two sliding plates 51 located inside the seat plate 21. The two sliding plates 51 are respectively sleeved on two anti-reverse rods 221 through bearings. The seat plate 21 has a groove for the sliding plates 51 to move with the anti-reverse rods 221, so that the sliding plates 51 can move synchronously and linearly with the anti-reverse rods 221, but will not rotate with the anti-reverse rods 221. A connecting rod 52 is rotatably arranged on the sliding plate 51. The ends of the two connecting rods 52 away from the sliding plates 51 are rotatably connected to each other. The seat plate 21 has a movable groove for the connecting rods 52 to move.

[0046] With this design, when any one of the stop levers 221 is pulled, the corresponding slide plate 51 moves, causing the position of the connecting rod 52 connected to it to change, thereby changing the position of the other connecting rod 52, so that the stop lever 221 on the other side is pushed by the corresponding slide plate 51 and adjusts its position synchronously.

[0047] In one embodiment, L-shaped positioning rods 6 are provided on both sides of the seat plate 21 near the width direction of the vehicle body 1, which are not located within the moving area of ​​the anti-reverse rod 221. The L-shaped positioning rod 6 consists of a vertical section connected to the seat plate 21 and a horizontal section connected to the vertical section. A positioning block is provided on the collar 222. A groove is provided on the side of the horizontal section away from the seat plate 21 for the positioning block to be inserted, so that the anti-reverse rod 221 can be moved out of the engagement groove and the corresponding positioning block can be rotated and inserted.

[0048] With this design, once the semi-trailer trailer has reached its destination, the operator can first pull any one of the stop levers 221 to move it out of the engagement groove. Then, rotate the stop lever 221 to align the positioning block with the groove. At this point, release the stop lever 221. This ensures that the stop lever 221 will not be reinserted into the engagement groove due to the action of the tension spring 223. Instead, the engagement groove remains open under the cooperation of the positioning block and the L-shaped positioning rod 6. This facilitates the subsequent driving mechanism 3 to move the saddle 2 away from the semi-trailer's towing pin, preventing the semi-trailer's towing pin from colliding with the saddle 2 during subsequent lifting operations, which would affect the normal lifting of the semi-trailer trailer.

[0049] In one embodiment, the sliding assembly 31 includes two guide rails 311 disposed on the top of the vehicle body 1 and two upright plates 312 located between the two guide rails 311. A screw 313 is fixedly disposed between the two upright plates 312. A slide table 314 located on top of the screw 313 is slidably disposed between the two guide rails 311. Multiple support components are disposed between the slide table 314 and the seat plate 21 for making the seat plate 21 move synchronously with the slide table 314. The support components can adopt hydraulic telescopic components, pneumatic telescopic components, and electric telescopic components in the prior art, so that the height of the seat plate 21 can be adjusted according to the needs to meet different semi-trailer models. A side plate 315 is disposed on the top of the slide table 314. A central shaft 316 is fixedly installed through the side plate 315. A driven disk 317 is provided at one end of the central shaft 316 near the drive assembly 32. The driven disk 317 is slidably mounted on the central shaft 316 and rotates relative to the central shaft 316. The driven disk 317 is provided with teeth on its outside. A compression spring 318 is provided between the driven disk 317 and the side plate 315 to push the driven disk 317 to move towards the drive assembly 32. A threaded sleeve 319 is threadedly connected to the screw 313, located at the bottom of the driven disk 317 and meshing with the driven disk 317. The threaded sleeve 319 is inserted into the slide table 314 and can rotate within the slide table 314, so that when the threaded sleeve 319 moves on the screw 313, it synchronously drives the slide table 314 to move.

[0050] The drive assembly 32 includes a motor 321 and an active disk 322 disposed at the output end of the motor 321. Both the driven disk 317 and the active disk 322 are provided with protrusions on opposite sides. When the compression spring 318 is in its natural state, the corresponding protrusion of the driven disk 317 is located in the rotation area of ​​the corresponding protrusion of the active disk 322.

[0051] With this design, when the compression spring 318 is in its natural state, the motor 321 rotates, driving the drive disc 322 to rotate. Since the corresponding protrusion of the driven disc 317 is located within the rotation area of ​​the corresponding protrusion of the drive disc 322, the driven disc 317 rotates together with the drive disc 322. The driven disc 317 also engages with the threaded sleeve 319. The rotation of the threaded sleeve 319 on the screw 313 will drive the slide table 314 to move along the guide rail 311. This allows the drive cutting mechanism 4 to change the movement state of the sliding component 31 simply by cutting off the connection between the driven disc 317 and the drive disc 322. Furthermore, the continued operation of the motor 321 after the connection is cut off will not have any adverse effects.

[0052] In one embodiment, the drive cutting mechanism 4 includes two pressure blocks 41 disposed within the seat plate 21 and movable along the length of the vehicle body 1. A lever 42, penetrating the seat plate 21 and inserted into the driven plate 317, is slidably disposed on the side of the pressure block 41 away from the engagement groove. An annular groove for inserting the lever 42 is provided on the driven plate 317. A spring 43 is disposed between the lever 42 and the corresponding pressure block 41. When the spring 43 is in its natural state, the bottom end of the lever 42 is located within the annular groove; when the spring 43 is compressed to its minimum state, the lever 42 is located outside the annular groove. The drive cutting mechanism 4 also includes a retaining rod 221 sleeved on it. The inner gear sleeve 44 meshes with the anti-reverse rod 221. The inner gear sleeve 44 is rotatably mounted in the seat plate 21 via a bearing. The outer peripheral wall of the anti-reverse rod 221 located inside the inner gear sleeve 44 is provided with teeth that mesh with the inner gear sleeve 44. This ensures that the anti-reverse rod 221 does not move the inner gear sleeve 44 when it moves towards or away from the engagement groove. However, when the anti-reverse rod 221 rotates, it will cause the inner gear sleeve 44 to rotate as well. A pull rope 45 is provided between the lever 42 and the inner gear sleeve 44. When the anti-reverse rod 221 is rotated and the positioning block is engaged in the sink groove, the inner gear sleeve 44 winds up the pull rope 45 and pulls the lever 42 to move it outside the annular groove.

[0053] This design utilizes the lever 42 to engage with the annular groove. When the corresponding protrusion of the driven disc 317 is located within the rotational area of ​​the corresponding protrusion of the driving disc 322, one end of the pressure block 41 is positioned within the engagement groove. As the semi-trailer's towing pin moves into the engagement groove, it continuously pushes the pressure block 41 until the pressure block 41 is completely inserted into the seat plate 21. The movement of the pressure block 41 then drives the lever 42 to push the driven disc 317 away from the driving disc 322, thereby allowing the semi-trailer's towing pin to fully engage. After entering the groove, the driven plate 317 can automatically separate from the driving plate 322, disengaging the transmission and stopping the seat plate 21 from moving. At the same time, due to the setting of the inner tooth sleeve 44 and the pull rope 45, when the positioning block and the L-shaped positioning rod 6 keep the engagement groove open, the lever 42 can move out of the annular groove, allowing the driven plate 317 to move back into the rotation area of ​​the corresponding protrusion of the driving plate 322 under the push of the compression spring 318, so that the drive assembly 32 can normally drive the sliding assembly 31 to move.

[0054] In one embodiment, a second synchronization mechanism 7 is provided between the two levers 42 for causing the two levers 42 to move in opposite directions. The second synchronization mechanism 7 includes a gear rotatably disposed in the base plate 21 and two racks disposed on the upper and lower sides of the gear. The two racks are respectively connected to the opposite side of the two levers 42 and are both engaged with the gear.

[0055] This design ensures that when any lever 42 is rotated by the inner gear sleeve 44 and pulled by the rope 45, it can drive the corresponding rack to move, causing the other rack to move in the opposite direction under the rotation of the gear, thereby simultaneously driving the other lever 42 to move out of the annular groove.

[0056] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0057] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0058] Additionally, "multiple" refers to two or more.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A piggyback transport vehicle, characterized in that, include: The vehicle body (1) is used to carry the semi-trailer cargo box; The saddle (2) is slidably disposed on the top of the vehicle body (1) for engaging with the semi-trailer traction pin. The saddle (2) includes a seat plate (21). The seat plate (21) has an engagement groove on the side near the semi-trailer for the semi-trailer traction pin to be inserted. The seat plate (21) is provided with a backstop assembly (22) for sealing the engagement groove after the semi-trailer traction pin is inserted into the engagement groove. The traveling mechanism (3) is used to drive the saddle (2) to move toward and away from the semi-trailer traction pin. The traveling mechanism (3) includes a sliding assembly (31) disposed on the top of the vehicle body (1) and a driving assembly (32) for driving the sliding assembly (31) to move toward and away from the semi-trailer traction pin. The drive cutting mechanism (4) is mounted on the saddle (2) and is used to cut off the drive of the drive assembly (32) to the sliding assembly (31) after the saddle (2) is engaged with the semi-trailer traction pin; The sliding assembly (31) includes two guide rails (311) disposed on the top of the vehicle body (1) and two upright plates (312) located between the two guide rails (311). A screw (313) is fixedly disposed between the two upright plates (312). A slide (314) located on the top of the screw (313) is slidably disposed between the two guide rails (311). Multiple support components are disposed between the slide (314) and the seat plate (21) for making the seat plate (21) move synchronously with the slide (314). A side plate (314) is disposed on the top of the slide (314). 15), a central shaft (316) is fixedly provided on the side plate (315) and passes through the side plate (315). A driven disk (317) is provided at one end of the central shaft (316) near the drive assembly (32). The driven disk (317) is slidably provided on the central shaft (316) and rotates relative to the central shaft (316). The driven disk (317) is provided with teeth. A compression spring (318) is provided between the driven disk (317) and the side plate (315). A threaded sleeve (319) that meshes with the driven disk (317) is threaded on the screw (313). The drive assembly (32) includes a motor (321) and an active disk (322) disposed at the output end of the motor (321). The driven disk (317) and the active disk (322) are provided with protrusions on opposite sides. When the compression spring (318) is in its natural state, the protrusion corresponding to the driven disk (317) is located in the rotation area of ​​the protrusion corresponding to the active disk (322). The drive cutting mechanism (4) includes two pressure blocks (41) disposed in the seat plate (21) and movable along the length of the vehicle body (1). The pressure block (41) has a lever (42) that passes through the seat plate (21) and is inserted into the driven plate (317) on the side away from the engagement groove. The driven plate (317) has an annular groove for the lever (42) to be inserted.

2. The piggyback transport vehicle according to claim 1, characterized in that: The anti-reverse assembly (22) includes at least one anti-reverse rod (221) disposed on the seat plate (21). One end of the anti-reverse rod (221) is inserted into the engagement groove, and the other end passes through the seat plate (21) and extends towards the side of the seat plate (21) in the width direction close to the vehicle body (1). A collar (222) is fixedly disposed at the end of the anti-reverse rod (221) away from the engagement groove. A tension spring (223) is disposed between the collar (222) and the seat plate (21). When the tension spring (223) is in its natural state, the anti-reverse rod (221) is located in the movement area of ​​the semi-trailer towing pin.

3. The piggyback transport vehicle according to claim 2, characterized in that: There are two anti-reverse rods (221), and the two anti-reverse rods (221) are respectively disposed on both sides of the seat plate (21). The seat plate (21) is provided with a first synchronization mechanism (5) for the two anti-reverse rods (221) to move out and into the joint groove simultaneously.

4. The piggyback transport vehicle according to claim 3, characterized in that: The first synchronization mechanism (5) includes two slide plates (51) located inside the seat plate (21). The two slide plates (51) are respectively sleeved on two anti-reverse rods (221) through bearings. The seat plate (21) has a groove for the slide plates (51) to move with the anti-reverse rods (221). A connecting rod (52) is rotatably arranged on the slide plate (51). The ends of the two connecting rods (52) away from the slide plates (51) are rotatably connected to each other. The seat plate (21) has a movable groove for the connecting rods (52) to move.

5. The piggyback transport vehicle according to claim 3, characterized in that: The seat plate (21) is provided with L-shaped positioning rods (6) on both sides of the vehicle body (1) in the width direction. The L-shaped positioning rod (6) consists of a vertical section connected to the seat plate (21) and a horizontal section connected to the vertical section. The collar (222) is provided with a positioning block. The horizontal section is provided with a groove on the side away from the seat plate (21) for the positioning block to be inserted. This groove is used to allow the anti-reverse rod (221) to be moved out of the engagement groove and then rotated and inserted by the corresponding positioning block.

6. The piggyback transport vehicle according to claim 5, characterized in that: A spring (43) is provided between the lever (42) and the corresponding pressure block (41). When the spring (43) is in its natural state, the bottom end of the lever (42) is located in the annular groove. When the spring (43) is compressed to its minimum state, the lever (42) is located outside the annular groove. The drive cutting mechanism (4) also includes an inner toothed sleeve (44) sleeved on the stop rod (221) and meshing with the stop rod (221). The inner toothed sleeve (44) is rotatably mounted in the seat plate (21) through a bearing. A pull rope (45) is provided between the lever (42) and the inner toothed sleeve (44). When the stop rod (221) is rotated and the positioning block is inserted into the sink groove, the inner toothed sleeve (44) winds up the pull rope (45) and pulls the lever (42) to move it outside the annular groove.

7. The piggyback transport vehicle according to claim 6, characterized in that: A second synchronization mechanism (7) is provided between the two levers (42) for causing the two levers (42) to move in opposite directions. The second synchronization mechanism (7) includes a gear rotatably disposed in the base plate (21) and two racks disposed on the upper and lower sides of the gear. The two racks are respectively connected to the opposite side of the two levers (42) and are both engaged with the gear.

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