Tractor connecting device

Abstract

The utility model belongs to the technical field of transportation devices, and relates to a tractor connecting device which comprises a seat plate of a hollow structure. A first fixing plate is fixedly connected to the inner side wall of the bottom of the seat plate; the first fixing plate is arranged in the seat plate; a first electric push rod is fixedly connected to the middle of the side wall of the first fixing plate. The limiting block, the lock pin block and the pin inlet groove are arranged, the connection between the tractor and the carriage to be dragged is tighter and firmer through the design of the pin block and the lock pin structure, larger traction force and impact force can be borne, and the stability and safety of the tractor under high-speed running or complex road conditions are ensured; and the arrangement of the pin block and the lock pin structure is beneficial to reducing the shaking and displacement of the carriage in the running process and reducing the risk of derailing, and meanwhile, when vehicle deployment is needed, the connection process and the separation process of the tractor and the carriage to be dragged can be quicker, simpler and more convenient, the operation difficulty and cost are reduced, and the operation efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of transportation devices, and specifically relates to a tractor connecting device. Background Art

[0002] A tractor refers to a large truck or semi-trailer in which the front end and the carriage are traction-connected by a tool. The front end of such a vehicle has driving ability and can be separated from the original carriage to tow other carriages; at the same time, the carriage can also be separated from the original front end and towed by other front ends. According to different characteristics and uses, tractors can be divided into semi-trailer tractors, full-trailer tractors, flatbed tractors, dump tractors, etc.

[0003] In the prior art, the front half of the towed carriage is placed on the traction saddle at the rear of the tractor, so that the rear axle of the tractor can bear part of the weight of the carriage, thereby improving the driving stability.

[0004] During long-term use and observation, it is found that during the process of using a tractor to tow a carriage, unstable connection between the tractor and the carriage will lead to the risk of derailment during driving.

[0005] Therefore, the utility model provides a tractor connecting device. Content of the Utility Model

[0006] In order to make up for the deficiencies of the prior art and solve at least one problem proposed in the background art, a tractor connecting device is proposed.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a tractor connection device described in the utility model comprises a seat plate; the seat plate is a hollow structure; the inner side wall at the bottom of the seat plate is fixedly connected to a first fixed plate; the first fixed plate is arranged inside the seat plate; the middle part of the side wall of the first fixed plate is fixedly connected to a first electric push rod; the output end of the first electric push rod is fixedly connected to a movable rod; the middle part of the side wall of the seat plate is fixedly connected to a second electric push rod; the output end of the second electric push rod is fixedly connected to a connecting plate; the end of the connecting plate is fixedly connected to a first movable plate; the first movable plate is arranged inside the seat plate; a transmission rod is fixedly connected between the first movable plate and the movable rod; the middle part of the side wall of the first movable plate is rotatably connected to the second movable plate; the other end of the second movable plate is rotatably connected to the seat plate; the middle part of the side wall of the second movable plate is fixedly connected to a limiting block; The inner wall at the bottom of the seat plate is rotatably connected with a locking pin block; the locking pin block is arranged inside the seat plate; the locking pin block and the limit block are arranged correspondingly; a pin entry groove is opened in the middle of the side wall of the seat plate; the pin entry groove and the locking pin block are arranged correspondingly; this step sets the limit block, the locking pin block and the pin entry groove, and the design of the pin block and the locking pin structure makes the connection between the tractor and the to-be-towed carriage tighter and more stable, and can withstand greater traction and impact force, ensuring the stability and safety of the tractor under high-speed driving or complex road conditions, and the setting of the pin block and the locking pin structure helps to reduce the shaking and displacement of the carriage during driving, and reduce the risk of derailment. At the same time, when vehicle deployment is required, this setting can make the connection and separation processes of the tractor and the to-be-towed carriage faster and simpler, reducing the difficulty and cost of operation, and improving operational efficiency.

[0008] Preferably, a plurality of slots are provided in the middle of the side wall of the seat plate; a first fixed cylinder is fixedly connected to the side wall at the top of the slot; the first fixed cylinder is arranged inside the seat plate; a first sliding block is slidably connected to the middle of the inner side wall of the first fixed cylinder; the first sliding block and the first fixed cylinder are interference fit; a first connecting rod is fixedly connected to the middle of the side wall of the first sliding block; the end of the first connecting rod is fixedly connected to the support plate; an air delivery assembly is provided inside the seat plate; the air delivery assembly is connected to the first fixed cylinder; this step can provide additional support for the connection between the tractor and the carriage to be towed by arranging the slots, the first fixed cylinder, the first sliding block, the first connecting rod and the support plate, making the entire connection structure more stable, and the plurality of support plates can evenly disperse the force between the tractor and the carriage to be towed, reduce the pressure of single-point force, and thus extend the service life of the connection components.

[0009] Preferably, the gas transmission component includes a second fixed cylinder; the second fixed cylinder is fixedly connected to the first fixing plate; a second sliding block is slidably connected to the middle of the inner side wall of the second fixed cylinder; the second sliding block is in interference fit with the second fixed cylinder; a second connecting rod is rotatably connected to the middle of the side wall of the second sliding block; the end of the second connecting rod is rotatably connected to a fixed block; the fixed block is fixedly connected to the second movable plate; a plurality of gas transmission pipes are fixedly connected to the middle of the inner side wall of the second fixed cylinder; the gas transmission pipes are connected to the first fixed cylinder; the second fixed cylinder, the gas transmission pipes and the first fixed cylinder are all hollow and communicated; in this step, by setting the second fixed cylinder, the second sliding block, the second connecting rod, the fixed block and the gas transmission pipes, the telescopic movement of the support plate between the tractor and the carriage to be towed can be controlled by an automatic principle. When connecting the tractor and the carriage to be towed together, the support plate extends out from the seat plate and supports between the tractor and the carriage to be towed. When the tractor and the carriage to be towed are separated, the support plate retracts into the seat plate to release the support between the tractor and the carriage to be towed. This setting can simplify the manual operation process and improve the efficiency and convenience of connection.

[0010] Preferably, a second fixing plate is fixedly connected to the middle of the side wall of the locking pin block; a notch is formed in the middle of the side wall of the second fixing plate; the notch is correspondingly arranged with the limiting block; in this step, by setting the second fixing plate and the notch, the position of the limiting block can be fixed to ensure that the pin block in the locking pin block will not accidentally fall off or separate when subjected to external impact or vibration.

[0011] Preferably, an elastic ball is fixedly connected to the middle of the side wall of the limiting block; the elastic ball is made of elastic material; the elastic ball is in interference fit with the notch; in this step, by setting the elastic ball, the possibility of the limiting block falling off from the notch can be further reduced, making the connection between the tractor and the carriage to be towed tighter and more stable.

[0012] Preferably, a first spring is fixedly connected to the middle of the side wall of the first fixing plate; the other end of the first spring is fixedly connected to the first movable plate; a second spring is fixedly connected to the middle of the side wall of the first fixing plate; the other end of the second spring is fixedly connected to the locking pin block; in this step, the first spring and the second spring are set, and their elastic deformations are used to absorb and disperse the impact energy received during the vehicle driving process, thereby protecting the connecting components from damage.

[0013] Preferably, an anti-slip pad is fixedly connected to the middle of the inner side wall of the locking pin block; the anti-slip pad is made of elastic material; in this step, by setting the anti-slip pad, the connection stability between the pin block and the locking pin block can be improved, preventing loosening or falling off under external forces such as vibration and impact.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. A connection device for a tractor described in the present utility model is provided with a limit block, a locking pin block and an inlet and outlet slot. Through the design of the pin block and the locking pin structure, the connection between the tractor and the carriage to be towed is made more tight and stable, capable of withstanding greater traction force and impact force, ensuring the stability and safety of the tractor under high-speed driving or complex road conditions. Moreover, the setting of the pin block and the locking pin structure helps to reduce the shaking and displacement of the carriage during driving, reducing the risk of derailment. At the same time, this setting enables the connection process and separation process of the tractor and the carriage to be towed to be faster and simpler when vehicle deployment is required, reducing the operation difficulty and cost and improving the operation efficiency.

[0016] 2. A connection device for a tractor described in the present utility model can control the telescoping of the support plate between the tractor and the carriage to be towed by adopting the principle of automation through the setting of a second fixed cylinder, a second sliding block, a second connecting rod, a fixed block and an air pipe. When connecting the tractor and the carriage to be towed together, the support plate extends out from the seat plate and supports between the tractor and the carriage to be towed. When the tractor and the carriage to be towed are separated, the support plate retracts into the seat plate to release the support between the tractor and the carriage to be towed. This setting can simplify the manual operation process and improve the efficiency and convenience of connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present utility model will be further described below with reference to the drawings.

[0018] Figure 1 is a perspective view of the present utility model;

[0019] Figure 2 is an internal structure diagram of the present utility model;

[0020] Figure 3 is a schematic diagram of the cooperation structure of the limit block and the locking pin block in the present utility model;

[0021] Figure 4 is a schematic diagram of the cooperation structure of the fixed cylinder and the air pipe in the present utility model.

[0022] LEGEND DESCRIPTION:

[0023] 1. Seat plate; 11. First fixing plate; 12. First electric push rod; 13. Moving rod; 14. Second electric push rod; 15. Connecting plate; 16. First movable plate; 17. Transmission rod; 18. Second movable plate; 19. Limit block; 110. Locking pin block; 111. Inlet and outlet slot; 2. Slot hole; 21. First fixed cylinder; 22. First sliding block; 23. First connecting rod; 24. Support plate; 3. Second fixed cylinder; 31. Second sliding block; 32. Second connecting rod; 33. Fixed block; 34. Air pipe; 4. Second fixing plate; 41. Notch; 5. Elastic ball; 6. First spring; 61. Second spring; 7. Anti-slip pad. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0025] Specific embodiments are given below.

[0026] As Figures 1 to 4As shown in the figure, a connecting device for a tractor according to an embodiment of the present utility model includes a seat plate 1; the seat plate 1 is provided with a hollow structure; a first fixing plate 11 is fixedly connected to the inner side wall of the bottom of the seat plate 1; the first fixing plate 11 is arranged inside the seat plate 1; a first electric push rod 12 is fixedly connected to the middle of the side wall of the first fixing plate 11; a movable rod 13 is fixedly connected to the output end of the first electric push rod 12; a second electric push rod 14 is fixedly connected to the middle of the side wall of the seat plate 1; a connecting plate 15 is fixedly connected to the output end of the second electric push rod 14; a first movable plate 16 is fixedly connected to the end of the connecting plate 15; the first movable plate 16 is arranged inside the seat plate 1; a transmission rod 17 is fixedly connected between the first movable plate 16 and the movable rod 13; a second movable plate 18 is rotatably connected to the middle of the side wall of the first movable plate 16; the other end of the second movable plate 18 is rotatably connected to the seat plate 1; a limiting block 19 is fixedly connected to the middle of the side wall of the second movable plate 18; a locking pin block 110 is rotatably connected to the inner side wall of the bottom of the seat plate 1; the locking pin block 110 is arranged inside the seat plate 1; the locking pin block 110 and the limiting block 19 are arranged corresponding to each other; an inlet and outlet slot 111 is formed in the middle of the side wall of the seat plate 1; the inlet and outlet slot 111 and the locking pin block 110 are arranged corresponding to each other;When working, the seat plate 1 is fixed on the tractor. At this time, the seat plate 1 is installed at the connection with the carriage to be towed. Then, the tractor driver starts the tractor and makes the tractor approach the carriage to be towed. When the pin block fixed at the bottom of the carriage to be towed enters the pin slot 111, the pin block will push open the locking pin block 110 and then enter the locking pin block 110. At this time, the tractor driver starts the first electric push rod 12, making the movable rod 13 contract into the first electric push rod 12. At the same time, the second electric push rod 14 is started, making the connecting plate 15 drive the first movable plate 16 to approach the first electric push rod 12. At this time, the transmission rod 17 connected between the first movable plate 16 and the movable rod 13 always maintains horizontal movement. When the first movable plate 16 moves, the first movable plate 16 will drive the second movable plate 18 to rotate, making the second movable plate 18 drive the limiting block 19 to move downward below the locking pin block 110. When the limiting block 19 blocks below the locking pin block 110, the first electric push rod 12 and the second electric push rod 14 are turned off. At this time, the pin block that enters the locking pin block 110 will not fall off from the locking pin block 110 under the restriction of the limiting block 19. When it is necessary to separate the tractor from the carriage to be towed, the first electric push rod 12 and the second electric push rod 14 are started again, making the first movable plate 16 drive the second movable plate 18 to open outward, making the limiting block 19 release the position restriction on the pin block in the locking pin block 110. Then, the tractor is started to control the separation of the tractor and the carriage to be towed. At this time, the pin block at the bottom of the carriage to be towed will leave the locking pin block 110. This step sets the limiting block 19, the locking pin block 110 and the pin slot 111. Through the design of the pin block and the locking pin structure, the connection between the tractor and the carriage to be towed is made more tight and stable, capable of withstanding greater traction and impact force, ensuring the stability and safety of the tractor under high-speed driving or complex road conditions. Moreover, the setting of the pin block and the locking pin structure helps to reduce the shaking and displacement of the carriage during driving, reducing the risk of derailment. At the same time, this setting can make the connection process and separation process of the tractor and the carriage to be towed faster and more convenient when vehicle allocation is required, reducing the operation difficulty and cost and improving the operation efficiency.

[0027] As Figures 2 to 4As shown in the figure, a plurality of slot holes 2 are provided in the middle of the side wall of the seat plate 1; a first fixing cylinder 21 is fixedly connected to the top side wall of the slot hole 2; the first fixing cylinder 21 is arranged inside the seat plate 1; a first sliding block 22 is slidably connected to the middle of the inner side wall of the first fixing cylinder 21; the first sliding block 22 and the first fixing cylinder 21 are in interference fit; a first connecting rod 23 is fixedly connected to the middle of the side wall of the first sliding block 22; a support plate 24 is fixedly connected to the end of the first connecting rod 23; an air delivery assembly is arranged inside the seat plate 1; the air delivery assembly is communicated with the first fixing cylinder 21; during operation, when the air delivery assembly delivers air into the plurality of first fixing cylinders 21, because the first sliding block 22 and the first fixing cylinder 21 are in interference fit, the first sliding block 22 will slide inside the first fixing cylinder 21 under the action of pressure. When the first sliding block 22 moves, it will drive the first connecting rod 23 and the support plate 24 to move synchronously. At this time, the plurality of support plates 24 will extend out of the inside of the seat plate 1 and support between the tractor and the carriage to be towed. By setting the slot holes 2, the first fixing cylinder 21, the first sliding block 22, the first connecting rod 23 and the support plate 24 in this step, additional support can be provided for the connection between the tractor and the carriage to be towed, making the entire connection structure more stable, and the plurality of support plates 24 can evenly disperse the force between the tractor and the carriage to be towed, reducing the pressure of single-point force, thereby prolonging the service life of the connecting components.

[0028] As Figure 2 and Figure 4As shown, the gas transmission component includes a second fixed cylinder 3; the second fixed cylinder 3 is fixedly connected to the first fixed plate 11; a second sliding block 31 is slidably connected to the middle of the inner side wall of the second fixed cylinder 3; the second sliding block 31 and the second fixed cylinder 3 are in interference fit; a second connecting rod 32 is rotatably connected to the middle of the side wall of the second sliding block 31; the end of the second connecting rod 32 is rotatably connected to a fixed block 33; the fixed block 33 is fixedly connected to the second movable plate 18; a plurality of gas transmission pipes 34 are fixedly connected to the middle of the inner side wall of the second fixed cylinder 3; the gas transmission pipes 34 are connected to the first fixed cylinder 21; the second fixed cylinder 3, the gas transmission pipes 34 and the first fixed cylinder 21 are all hollow and connected; during operation, when the second movable plate 18 drives the limit block 19 to approach below the locking pin block 110, the fixed block 33 on the side wall of the second movable plate 18 will move synchronously, so that the fixed block 33 pushes the second connecting rod 32 to move inside the second fixed cylinder 3. When the second connecting rod 32 moves, it will push the second sliding block 31 to slide inside the second fixed cylinder 3. Because the second sliding block 31 and the second fixed cylinder 3 are in interference fit, and the second fixed cylinder 3, the gas transmission pipes 34 and the first fixed cylinder 21 are connected, at this time, the gas inside the second fixed cylinder 3 will enter the inside of the first fixed cylinder 21 through the plurality of gas transmission pipes 34 during the extrusion of the second sliding block 31, so that the support plate 24 extends out of the seat plate 1 and supports between the tractor and the carriage to be towed. When it is necessary to separate the tractor and the carriage to be towed, the second movable plate 18 will drive the limit block 19 to leave below the locking pin block 110. At this time, the fixed block 33 on the side wall of the second movable plate 18 will move synchronously, so that the second sliding block 31 moves reversely inside the second fixed cylinder 3, and the gas inside the first fixed cylinder 21 is pumped into the second fixed cylinder 3 through the gas transmission pipes 34. At this time, the support plate 24 no longer supports between the tractor and the carriage to be towed, but returns to the inside of the first fixed cylinder 21. This step can control the telescopic movement of the support plate 24 between the tractor and the carriage to be towed by using the automation principle by setting the second fixed cylinder 3, the second sliding block 31, the second connecting rod 32, the fixed block 33 and the gas transmission pipes 34. When connecting the tractor and the carriage to be towed together, the support plate 24 extends out of the seat plate 1 and supports between the tractor and the carriage to be towed. When the tractor and the carriage to be towed are separated, the support plate 24 retracts into the seat plate 1 to release the support between the tractor and the carriage to be towed. This setting can simplify the manual operation process and improve the connection efficiency and convenience.

[0029] As Figures 1 to 3As shown, a second fixing plate 4 is fixedly connected to the middle of the side wall of the locking pin block 110; a notch 41 is formed in the middle of the side wall of the second fixing plate 4; the notch 41 and the limiting block 19 are arranged correspondingly; during operation, when the limiting block 19 moves below the locking pin block 110 and restricts the pin block within the locking pin block 110, the limiting block 19 will insert into the notch 41. At this time, the notch 41 restricts the position of the limiting block 19. By setting the second fixing plate 4 and the notch 41 in this step, the position of the limiting block 19 can be fixed, ensuring that the pin block within the locking pin block 110 will not accidentally fall off or separate when subjected to external impacts or vibrations.

[0030] As Figure 2 and Figure 3 shown, an elastic ball 5 is fixedly connected to the middle of the side wall of the limiting block 19; the elastic ball 5 is made of an elastic material; the elastic ball 5 and the notch 41 are in interference fit; during operation, when the limiting block 19 inserts into the notch 41, the elastic ball 5 on the side wall of the limiting block 19 will also pass through the notch 41. Because the elastic ball 5 and the notch 41 are in interference fit, the elastic ball 5 will be stuck outside the notch 41 when not under force. By setting the elastic ball 5 in this step, the possibility of the limiting block 19 falling off from the notch 41 can be further reduced, making the connection between the tractor and the carriage to be towed more tight and stable.

[0031] As Figure 2 and Figure 3 shown, a first spring 6 is fixedly connected to the middle of the side wall of the first fixing plate 11; the other end of the first spring 6 is fixedly connected to the first movable plate 16; a second spring 61 is fixedly connected to the middle of the side wall of the first fixing plate 11; the other end of the second spring 61 is fixedly connected to the locking pin block 110; by setting the first spring 6 and the second spring 61 in this step, the impact energy received during vehicle driving can be absorbed and dispersed through their elastic deformation, thereby protecting the connecting components from damage.

[0032] As Figures 1 to 3 shown, an anti-slip pad 7 is fixedly connected to the middle of the inner side wall of the locking pin block 110; the anti-slip pad 7 is made of an elastic material; by setting the anti-slip pad 7 in this step, the connection stability between the pin block and the locking pin block 110 can be improved, preventing loosening or falling off under external forces such as vibration and impact.

[0033] Working principle: Fix the seat plate 1 on the tractor. At this time, the seat plate 1 is installed at the connection with the carriage to be towed. Then, the tractor driver starts the tractor and makes the tractor approach the carriage to be towed. When the pin block fixed at the bottom of the carriage to be towed enters the pin slot 111, the pin block will push open the locking pin block 110 and then enter the locking pin block 110. At this time, the tractor driver starts the first electric push rod 12, causing the movable rod 13 to contract into the first electric push rod 12. At the same time, the second electric push rod 14 is started, causing the connecting plate 15 to drive the first movable plate 16 to approach the first electric push rod 12. At this time, the transmission rod 17 connected between the first movable plate 16 and the movable rod 13 always maintains horizontal movement. When the first movable plate 16 moves, the first movable plate 16 will drive the second movable plate 18 to rotate, causing the second movable plate 18 to drive the limiting block 19 to move downward below the locking pin block 110. When the limiting block 19 blocks below the locking pin block 110, the first electric push rod 12 and the second electric push rod 14 are turned off. At this time, the pin block that enters the locking pin block 110 will not fall off from the locking pin block 110 under the restriction of the limiting block 19. When it is necessary to separate the tractor from the carriage to be towed, the first electric push rod 12 and the second electric push rod 14 are started again, causing the first movable plate 16 to drive the second movable plate 18 to open outward, so that the limiting block 19 releases the position restriction on the pin block in the locking pin block 110. Then, the tractor is started to control the separation of the tractor from the carriage to be towed. At this time, the pin block at the bottom of the carriage to be towed will leave the locking pin block 110. When the air supply component supplies air into the multiple first fixed cylinders 21, because the first sliding block 22 and the first fixed cylinder 21 are in interference fit, the first sliding block 22 will slide inside the first fixed cylinder 21 under the action of pressure. When the first sliding block 22 moves, it will drive the first connecting rod 23 and the support plate 24 to move synchronously. At this time, the multiple support plates 24 will extend out of the seat plate 1 and support between the tractor and the carriage to be towed. When the second movable plate 18 drives the limiting block 19 to approach below the locking pin block 110, the fixed block 33 on the side wall of the second movable plate 18 will move synchronously, causing the fixed block 33 to push the second connecting rod 32 to move inside the second fixed cylinder 3. When the second connecting rod 32 moves, it will push the second sliding block 31 to slide inside the second fixed cylinder 3. Because the second sliding block 31 and the second fixed cylinder 3 are in interference fit, and the second fixed cylinder 3, the air pipe 34 and the first fixed cylinder 21 are connected, at this time, the gas inside the second fixed cylinder 3 will enter the first fixed cylinder 21 through the multiple air pipes 34 during the extrusion of the second sliding block 31, causing the support plate 24 to extend out of the seat plate 1 and support between the tractor and the carriage to be towed. When it is necessary to separate the tractor from the carriage to be towed, the second movable plate 18 will drive the limiting block 19 to leave below the locking pin block 110. At this time, the fixed block 33 on the side wall of the second movable plate 18 will move synchronously, causing the second sliding block 31 to move reversely inside the second fixed cylinder 3, pumping the gas inside the first fixed cylinder 21 through the air pipe 34 into the second fixed cylinder 3. At this time, the support plate 24 no longer supports between the tractor and the carriage to be towed,Instead, it returns to the inside of the first fixed cylinder 21. When the limit block 19 moves below the locking pin block 110 and restricts the pin block within the locking pin block 110, the limit block 19 will insert into the notch 41. At this time, the notch 41 restricts the position of the limit block 19. When the limit block 19 inserts into the notch 41, the elastic ball 5 on the side wall of the limit block 19 will also pass through the notch 41. Because the elastic ball 5 and the notch 41 are in interference fit, the elastic ball 5 will be stuck outside the notch 41 when not under force.

[0034] The above shows and describes the basic principles, main features, and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A tractor connection device, comprising a seat plate (1); characterized in that: The seat plate (1) is a hollow structure; a first fixed plate (11) is fixedly connected to the inner side wall of the bottom of the seat plate (1); the first fixed plate (11) is arranged inside the seat plate (1); a first electric push rod (12) is fixedly connected to the middle of the side wall of the first fixed plate (11); a movable rod (13) is fixedly connected to the output end of the first electric push rod (12); a second electric push rod (14) is fixedly connected to the middle of the side wall of the seat plate (1); a connecting plate (15) is fixedly connected to the output end of the second electric push rod (14); a first movable plate (16) is fixedly connected to the end of the connecting plate (15); the first movable plate (16) is arranged inside the seat plate (1); the first movable plate (16) ) and a movable rod (13); a transmission rod (17) is fixedly connected between the first movable plate (16) and the movable rod (13); a second movable plate (18) is rotatably connected to the middle of the side wall of the first movable plate (16); the other end of the second movable plate (18) is rotatably connected to the seat plate (1); a limiting block (19) is fixedly connected to the middle of the side wall of the second movable plate (18); a locking pin block (110) is rotatably connected to the inner side wall of the bottom of the seat plate (1); the locking pin block (110) is arranged inside the seat plate (1); the locking pin block (110) and the limiting block (19) are correspondingly arranged; a pin entry groove (111) is opened in the middle of the side wall of the seat plate (1); the pin entry groove (111) and the locking pin block (110) are correspondingly arranged.

2. A tractor connection device according to claim 1, characterized in that: A plurality of slots (2) are provided in the middle of the side wall of the seat plate (1); a first fixed cylinder (21) is fixedly connected to the top side wall of the slots (2); the first fixed cylinder (21) is arranged inside the seat plate (1); a first sliding block (22) is slidably connected to the middle of the inner side wall of the first fixed cylinder (21); the first sliding block (22) and the first fixed cylinder (21) are interference fit; a first connecting rod (23) is fixedly connected to the middle of the side wall of the first sliding block (22); a support plate (24) is fixedly connected to the end of the first connecting rod (23); a gas transmission component is provided inside the seat plate (1); the gas transmission component is connected to the first fixed cylinder (21).

3. A tractor connection device according to claim 2, characterized in that: The gas delivery assembly comprises a second fixed cylinder (3); the second fixed cylinder (3) is fixedly connected to the first fixed plate (11); a second sliding block (31) is slidably connected to the middle of the inner wall of the second fixed cylinder (3); the second sliding block (31) and the second fixed cylinder (3) are interference fit; a second connecting rod (32) is rotatably connected to the middle of the side wall of the second sliding block (31); a fixed block (33) is rotatably connected to the end of the second connecting rod (32); the fixed block (33) is fixedly connected to the second movable plate (18); a plurality of gas delivery pipes (34) are fixedly connected to the middle of the inner wall of the second fixed cylinder (3); the gas delivery pipes (34) are connected to the first fixed cylinder (21); the second fixed cylinder (3), the gas delivery pipes (34) and the first fixed cylinder (21) are all hollow and connected.

4. A tractor connection device according to claim 1, characterized in that: A second fixing plate (4) is fixedly connected to the middle of the side wall of the locking pin block (110); a notch (41) is provided in the middle of the side wall of the second fixing plate (4); and the notch (41) and the limit block (19) are arranged correspondingly.

5. A tractor connection device according to claim 4, characterized in that: An elastic ball (5) is fixedly connected to the middle of the side wall of the limiting block (19); the elastic ball (5) is made of elastic material; and the elastic ball (5) and the notch (41) are interference fit.

6. A tractor connection device according to claim 3, characterized in that: A first spring (6) is fixedly connected to the middle of the side wall of the first fixed plate (11); the other end of the first spring (6) is fixedly connected to the first movable plate (16); a second spring (61) is fixedly connected to the middle of the side wall of the first fixed plate (11); the other end of the second spring (61) is fixedly connected to the locking pin block (110).

7. A tractor connection device according to claim 6, characterized in that: An anti-skid pad (7) is fixedly connected to the middle of the inner side wall of the locking pin block (110); the anti-skid pad (7) is made of elastic material.

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