Quick locking automatic reset connecting mechanism for towing vehicle

Abstract

The application discloses a quick locking and automatic resetting connecting mechanism for a towing vehicle and relates to the technical field of connecting mechanisms of towing vehicles. The quick locking and automatic resetting connecting mechanism for the towing vehicle comprises a towing seat and a connecting end which are connected with each other, the towing seat comprises a first fixing mechanism, a transmission assembly, a clamping claw and a limiting piece, the transmission assembly, the clamping claw and the limiting piece are all installed on the first fixing mechanism, and the limiting piece controls the opening and closing of the clamping claw through the transmission assembly. The quick locking and automatic resetting connecting mechanism for the towing vehicle is characterized in that the second inclined surface on the buckling piece cooperates with the first inclined surface on the sleeve column, after the position is found, the towing vehicle triggers the transmission rack to move downward, the transmission gear to rotate, the telescopic rod to extend and the clamping claw to open during the reversing process, the parking distance does not need to be adjusted, and after the spherical connecting block enters the predetermined position, the resetting spring automatically drives each component to reset and complete the locking.

Description

Technical Field

[0001] This invention relates to the field of tractor connection mechanism technology, and in particular to a quick-locking and automatic reset connection mechanism for tractors. Background Technology

[0002] The connection between the tractor and the trailer, material car, or other towed equipment typically relies on a towing connector or tow hook. In the prior art, for example, Chinese patent CN222875683U discloses a locking mechanism for a tractor, which enables quick connection and locking between the tractor and the trailer.

[0003] However, this locking mechanism still has the following shortcomings in actual use: (1) The connection and separation process still requires a lot of manual operation. When the tractor reverses to dock, the parking distance needs to be adjusted repeatedly. This is especially inconvenient when there is only one driver, making it difficult to achieve true fast automatic locking. (2) The locking method of this mechanism is a single-layer locking structure, which lacks a redundant safety mechanism and is at risk of accidental disengagement under vibration and impact during operation; (3) The mechanism cannot effectively buffer the impact load during emergency braking or acceleration, which can easily lead to increased wear or even damage to the connecting parts, affecting the reliability and service life of the connection. Summary of the Invention

[0004] The purpose of this invention is to provide a quick-locking automatic reset connection mechanism for a tractor. By engaging the second inclined surface on the fastener with the first inclined surface on the sleeve, after the position is accurately located, the transmission rack moves down, the transmission gear rotates, the telescopic rod extends, and the clamping claws open during the reversing process of the tractor. There is no need to adjust the parking distance. After the spherical connecting block enters the predetermined position, the reset spring automatically drives each component to reset and complete the locking. The entire process requires no manual intervention, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a quick-locking automatic reset connection mechanism for a tractor vehicle, comprising a traction seat and a connecting end that are mutually connected. The traction seat includes a first fixing mechanism, a transmission assembly, a clamping claw, and a limiting member. The transmission assembly, the clamping claw, and the limiting member are all mounted on the first fixing mechanism, and the limiting member controls the opening and closing of the clamping claw through the transmission assembly. The connecting end includes a second fixing mechanism, a spherical connecting block, and a fastening member. The spherical connecting block is movably connected to the second fixing mechanism, and the spherical connecting block is fixedly connected to the fastening member. After the traction seat and the connecting end are connected, the clamping claw clamps the spherical connecting block to achieve the first layer of connection, and the fastening member engages with the limiting member to achieve the second layer of connection.

[0006] Preferably, the transmission assembly includes a telescopic rod, a threaded sleeve, a transmission gear, and a transmission rack. The telescopic rod is sleeved with the threaded sleeve, and one end of the telescopic rod is movably connected to the transmission gear. One side of the transmission gear meshes with the transmission rack.

[0007] Preferably, the transmission gear has a slot at its center, and a limit slider is provided at equal intervals on one side of the slot. The slot is inserted into one end of the telescopic rod, and a groove matching the limit slider is provided on the outer wall of the telescopic rod near the slot. An external thread is connected at the position where the telescopic rod engages with the threaded sleeve.

[0008] Preferably, the lower end of the telescopic rod is connected to a flat clamping plate, and two flat clamping plates are provided, which clamp one end of the clamping claw.

[0009] Preferably, the first fixing mechanism is a T-shaped box structure, including a transverse mechanism and a longitudinal mechanism. One end of the transverse mechanism is fixedly connected to the side wall of the longitudinal mechanism. The transverse mechanism has a first mounting groove that matches the threaded sleeve, a movable groove for the movement of the flat clamping plate, and a second mounting groove for mounting the clamping claw. The longitudinal mechanism has a gear groove for mounting the transmission gear, a rack groove for mounting the transmission rack, and a third mounting groove for mounting the limiting member. The third mounting groove is connected to the gear groove, and the third mounting groove located below the rack groove is linearly connected to the rack groove.

[0010] Preferably, the clamping claw includes two symmetrically arranged hemispherical clamping plates and a mounting bracket disposed on the hemispherical clamping plates. The mounting bracket is movably connected to the second mounting groove via a short shaft, and the side of the hemispherical clamping plate away from the mounting bracket is a curved flared opening.

[0011] Preferably, the limiting component includes a parallel rod movably connected to the third mounting groove, a return spring sleeved on the parallel rod, a support rod connected to the lower end of the parallel rod, and a sleeve fixedly connected to the support rod. One end of the parallel rod near the rack groove is fixedly connected to the transmission rack, and a locking block is fixedly connected to the upper end of the other side of the parallel rod. The return spring is sleeved in the position where the parallel rod is placed in the third mounting groove, with the lower end of the return spring abutting against the third mounting groove and the upper end of the return spring abutting against the locking block or the transmission rack.

[0012] Preferably, the fastening component includes a U-shaped block and a right-angle bracket, the right-angle bracket being fixedly connected to the U-shaped block, and the U-shaped block being connected to the support column through the right-angle bracket.

[0013] Preferably, the top surface of the sleeve is provided with a first inclined surface, which is oriented towards the fastening component. A second inclined surface is provided on one side of the U-shaped block, which matches the first inclined surface. The hole in the center of the U-shaped block is larger than the diameter of the sleeve, and the thickness of the U-shaped block is less than the height of the highest point of the sleeve.

[0014] Preferably, a support column is fixedly connected to the side of the spherical connecting block away from the traction seat. One end of the support column extends into the second fixing mechanism. A limit plate is provided in the second fixing mechanism for the support column, and buffer springs are provided on both sides of the limit plate.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The quick-locking automatic reset connection mechanism for tractor vehicles of the present invention, through the cooperation of the second inclined surface on the fastening member and the first inclined surface on the sleeve column, automatically triggers the transmission rack to move down, the transmission gear to rotate, the telescopic rod to extend, and the clamping claw to open during the reversing process of the tractor vehicle after the position is accurately found. There is no need to adjust the parking distance. After the spherical connecting block enters the predetermined position, the reset spring automatically drives each component to reset and complete the locking. No manual intervention is required throughout the process, which completely solves the problem of repeated adjustments due to parking distance deviation and significantly improves docking efficiency.

[0016] The present invention provides a quick-locking and automatic reset connection mechanism for a tractor. The first layer connects two hemispherical clamps that wrap and lock a spherical connecting block. The second layer connects a sleeve and a U-shaped block that hook together. The two layers provide double protection. When the first layer fails due to extreme working conditions, the second layer prevents the traction seat from immediately separating from the connecting end, giving the driver time to react in an emergency and improving traction safety.

[0017] The present invention discloses a quick-locking automatic reset connection mechanism for a tractor, wherein a spherical connecting block is enclosed within a spherical space formed by two hemispherical clamping plates, and can rotate freely within this space. This allows it to adapt to changes in the angle of the tractor when turning and positional deviations under bumpy road conditions, avoiding structural stress caused by rigid connections. Furthermore, the rear support column of the spherical connecting block achieves axial elastic buffering within the second fixing mechanism through a limiting plate and buffer springs on both sides, absorbing impact loads during emergency braking or acceleration, reducing rigid collision wear between the hemispherical clamping plates and the spherical connecting block, and extending service life. Attached Figure Description

[0018] Figure 1 This is an overall structural diagram of the quick-locking automatic reset connection mechanism for a tractor vehicle according to the present invention; Figure 2 This is a connection structure diagram of the transmission assembly, clamping claw, and limiting member of the present invention; Figure 3 This is a schematic diagram of the first fixing mechanism of the present invention; Figure 4 This is an exploded view of the transmission assembly and clamping claw of the present invention; Figure 5 This is a structural diagram of the limiting component of the present invention; Figure 6 This is a structural diagram of the connection end of the present invention; Figure 7This is a diagram showing the connection state of the quick-locking automatic reset connection mechanism for a tractor vehicle according to the present invention. Figure 8 This is a diagram showing the state of the quick-locking automatic reset connection mechanism for a tractor vehicle after connection according to the present invention.

[0019] In the diagram: 1. First fixing mechanism; 11. Lateral mechanism; 111. First mounting slot; 112. Movable slot; 113. Second mounting slot; 12. Longitudinal mechanism; 121. Gear slot; 122. Rack slot; 123. Third mounting slot; 2. Transmission assembly; 21. Telescopic rod; 211. Slide groove; 212. External thread; 213. Flat clamp; 22. Threaded sleeve; 23. Transmission gear; 231. Slot; 232. Limiting slider; 24. Transmission rack; 241. Slide bar 3. Clamping claw; 31. Hemispherical clamping plate; 32. Mounting bracket; 321. Short shaft; 322. Reinforcing ring; 4. Limiting component; 41. Parallel rod; 411. Locking block; 42. Return spring; 43. Support rod; 431. Pull rod; 44. Sleeve column; 441. First inclined plane; 5. Second fixing mechanism; 6. Spherical connecting block; 61. Support column; 62. Limiting plate; 63. Buffer spring; 7. Fastening component; 71. U-shaped block; 711. Second inclined plane; 72. Right angle bracket. Detailed Implementation

[0020] 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 some embodiments of the present invention, and not all embodiments. 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.

[0021] Please see Figures 1-8 A quick-locking automatic reset connection mechanism for a tractor includes a traction seat and a connecting end that are connected to each other. The traction seat includes a first fixing mechanism 1, a transmission assembly 2, a clamping claw 3, and a limiting member 4. The transmission assembly 2, the clamping claw 3, and the limiting member 4 are all mounted on the first fixing mechanism 1, and the limiting member 4 controls the opening and closing of the clamping claw 3 through the transmission assembly 2. The connecting end includes a second fixing mechanism 5, a spherical connecting block 6, and a fastening member 7. The spherical connecting block 6 is movably connected to the second fixing mechanism 5, and the spherical connecting block 6 is fixedly connected to the fastening member 7. After the traction seat and the connecting end are connected, the clamping claw 3 clamps the spherical connecting block 6 to achieve the first layer of connection, and the fastening member 7 is sleeved with the limiting member 4 to achieve the second layer of connection.

[0022] Specifically, the transmission assembly 2 includes a telescopic rod 21, a threaded sleeve 22, a transmission gear 23, and a transmission rack 24. The telescopic rod 21 is sleeved with the threaded sleeve 22. One end of the telescopic rod 21 is movably connected to the transmission gear 23. One side of the transmission gear 23 meshes with the transmission rack 24. When the transmission rack 24 moves up and down, it can drive the transmission gear 23 to rotate. A slot 231 is provided in the center of the transmission gear 23. Limiting sliders 232 are provided at equal intervals on one side of the slot 231. The slot 231 is inserted into one end of the telescopic rod 21, and a groove matching the limiting slider 232 is provided on the outer wall of the telescopic rod 21 near the slot 231. 211, the limiting slider 232 is placed in the slide groove 211 and moves. The telescopic rod 21 is connected to the threaded sleeve 22 at the position where it is sleeved. The external thread 212 meshes with the threaded sleeve 22. The position of the threaded sleeve 22 is fixed. The internal thread of the threaded sleeve 22 limits the external thread 212. The transmission gear 23 drives the telescopic rod 21 to rotate and extend along the threaded sleeve 22 through the limiting slider 232. The lower end of the telescopic rod 21 is connected to a parallel flat clamping plate 213. The flat clamping plate 213 clamps one end of the clamping claw 3. The telescopic rod 21 drives the flat clamping plate 213 to move. The flat clamping plate 213 drives the clamping claw 3 to rotate.

[0023] More specifically, the first fixing mechanism 1 is a T-shaped box structure, including a transverse mechanism 11 and a longitudinal mechanism 12. One end of the transverse mechanism 11 is fixedly connected to the side wall of the longitudinal mechanism 12. A first mounting groove 111 matching the threaded sleeve 22 is opened in the transverse mechanism 11. The first mounting groove 111 is interference-fitted with the threaded sleeve 22. A movable groove 112 is opened at the end of the transverse mechanism 11 near the flat clamping plate 213. Second mounting grooves 113 are symmetrically arranged on both sides of the movable groove 112. The clamping claw 3 is movably connected to the second mounting groove 113. A gear groove 121 is opened at the connection between the longitudinal mechanism 12 and the transverse mechanism 11. The transmission gear 23 and the gear The gear groove 121 is movably connected, and a rack groove 122 is provided on one side of the gear groove 121. A slide bar 241 is connected to one side of the transmission rack 24. The transmission rack 24 is set in the rack groove 122. The slide bar 241 is movably connected to the side wall of the rack groove 122. The slide bar 241 restricts the movement path of the transmission rack 24, and the transmission rack 24 cannot be disengaged from the rack groove 122. A third mounting groove 123 for mounting the limiting member 4 is also provided on the longitudinal mechanism 12. The third mounting groove 123 is connected to the gear groove 121, and the third mounting groove 123 located below the rack groove 122 is linearly connected to the rack groove 122. The transmission rack 24 can move into the third mounting groove 123.

[0024] Furthermore, the clamping claw 3 includes two symmetrically arranged hemispherical clamping plates 31 and a mounting bracket 32 ​​disposed on the hemispherical clamping plates 31. The mounting bracket 32 ​​is movably connected to the second mounting groove 113 via a short shaft 321. A reinforcing ring 322 is disposed on the mounting bracket 32 ​​near the short shaft 321. The reinforcing ring 322 is coaxially disposed with the short shaft 321. The hemispherical clamping plates 31 rotate around the short shaft 321 via the mounting bracket 32. The second mounting groove 113 is provided with a rotation groove that matches the reinforcing ring 322. The structure is enhanced by the two-stage structure of the reinforcing ring 322 and the short shaft 321, which are movably connected to the second mounting groove 113. The structural strength is improved. The side of the hemispherical clamp 31 away from the mounting bracket 32 ​​is an arc-shaped flared opening, which facilitates the insertion of the spherical connecting block 6. After the two hemispherical clamps 31 are closed, they completely enclose the maximum diameter of the spherical connecting block 6. The spherical connecting block 6 moves within the spherical space enclosed by the hemispherical clamps 31, allowing the spherical connecting block 6 to rotate, thereby adapting to the steering or bumpy road conditions when the tractor is moving.

[0025] The existing connection mechanism requires manual connection, making it difficult to control the stopping distance during tractor movement. With only one driver, multiple stops may be necessary to adjust the installation position. To address this issue, a limiting element 4 is provided on the longitudinal mechanism 12. The limiting element 4 includes a connecting parallel rod 41 that moves with the third mounting groove 123, a return spring 42 sleeved on the parallel rod 41, a support rod 43 connected to the lower end of the parallel rod 41, and a sleeve 44 fixedly connected to the support rod 43. The parallel rod 41 and the support rod 43 are integrally formed, with a rounded transition at their connection point. The parallel rod 41 penetrates the bottom of the third mounting groove 123. The upper end of the parallel rod 41 near the rack groove 122 is fixedly connected to the transmission rack 24, and a locking block is fixedly connected to the upper end of the other side of the parallel rod 41. 411. The return spring 42 is sleeved in the position where the parallel rod 41 is placed in the third mounting groove 123. The lower end of the return spring 42 abuts against the third mounting groove 123, and the upper end of the return spring 42 abuts against the locking block 411 or the transmission rack 24. Under the action of the return spring 42, the transmission rack 24 and the locking block 411 are pushed to move upward, and the transmission rack 24 and the locking block 411 are always given an upward driving force. When the transmission rack 24 moves to the uppermost end of the rack groove 122, the locking block 411 contacts the transmission gear 23, and the transmission gear 23 is tightened to prevent the transmission gear 23 from loosening.

[0026] Specifically, the top surface of the sleeve 44 is provided with a first inclined surface 441, which is set away from the parallel rod 41 and towards the fastening part 7. The sleeve 44 is supported by the support rod 43, keeping the lower surface of the sleeve 44 horizontal. A pull rod 431 is provided on the side of the support rod 43 away from the sleeve 44. The pull rod 431 is easy to hold when disassembling and connecting. The pull rod 431 drives the support rod 43, the parallel rod 41 and the sleeve 44 to move down, and the return spring 42 is compressed. In order to realize the automatic disassembly of the connecting mechanism, a driving structure, such as a motor-driven linkage structure or a cylinder-driven push block, can also be installed on the lower surface of the transverse mechanism 11 or the side wall of the longitudinal mechanism 12 to push the pull rod 431 to move down, realize the overall downward movement of the limiting part 4, drive the transmission rack 24 to move down, the transmission gear 23 to rotate, the telescopic rod 21 to extend, and the hemispherical clamp 31 to rotate and open, releasing the spherical connecting block 6.

[0027] It is important to understand that a support column 61 is fixedly connected to the side of the spherical connecting block 6 away from the hemispherical clamping plate 31. The lower side of the support column 61 is welded to the upper end of the fastener 7. One end of the support column 61 extends into the second fixing mechanism 5. The second fixing mechanism 5 is a hollow cylindrical structure. A limit plate 62 is provided inside the second fixing mechanism 5. Both sides of the limit plate 62 are provided with buffer springs 63. One buffer spring 63 is sleeved on the support column 61, and the other buffer spring 63 abuts against the mounting surface of the second fixing mechanism 5. Under the action of the buffer spring 63, the support column 61 can drive the spherical connecting block 6 to extend and retract within the second fixing mechanism 5. When encountering sudden braking or acceleration, the buffer spring 63 can buffer the impact force, prevent the spherical connecting block 6 from colliding hard with the hemispherical clamping plate 31, and reduce wear.

[0028] In addition, the fastening component 7 includes a U-shaped block 71 and a right-angle bracket 72. The right-angle bracket 72 is fixedly connected to the U-shaped block 71, and the U-shaped block 71 is connected to the support column 61 through the right-angle bracket 72. A second inclined surface 711 is provided on one side of the U-shaped block 71, which matches the first inclined surface 441. The hole in the center of the U-shaped block 71 is adapted to the sleeve column 44. During operation, the second inclined surface 711 contacts the first inclined surface 441. As the first inclined surface 441 moves closer, the second inclined surface 711 remains stationary. The first inclined surface 441 is pushed downward by the second inclined surface 711, and the parallel rod 41 drives the transmission rack 24 to move downward. The return spring 42 is compressed, and at the same time, the transmission gear 23 rotates to control the extension and retraction. As rod 21 extends, hemispherical clamp 31 rotates and opens. During this process, spherical connecting block 6 moves to the position between the two open hemispherical clamps 31 as the tractor moves backward. When the second inclined plane 711 passes the first inclined plane 441, the downward limiting force of the first inclined plane 441 disappears, and the return spring 42 pushes the transmission rack 24 to move upward and reset. The sleeve 44 moves upward as well. At this time, the sleeve 44 engages with the hole in the center of the U-shaped block 71, and the sleeve 44 hooks with the U-shaped block 71. At the same time, the transmission rack 24 drives the transmission gear 23 to rotate and reset, the telescopic rod 21 retracts, the flat clamp 213 drives the mounting bracket 32 ​​to rotate and reset, and the hemispherical clamp 31 closes and resets, wrapping the spherical connecting block 6. The installation is complete.

[0029] It should be noted that the hole in the center of the U-shaped block 71 is larger than the diameter of the sleeve 44, and the thickness of the U-shaped block 71 is less than the height of the highest point of the sleeve 44. The sleeve 44 and the U-shaped block 71 are not completely hooked together; there is a gap between them. This gap serves two purposes: firstly, it reduces the difficulty of hooking the sleeve 44 and the U-shaped block 71; secondly, it facilitates the movement of the U-shaped block 71 around the sleeve 44 without affecting the rotation of the hemispherical clamp 31 and the spherical connecting block 6. The U-shaped block 71 pushes the sleeve 44 downward, thereby triggering the hemispherical clamp 31 to open. The structure in which the U-shaped block 71 and the sleeve 44 hook together provides redundant protection. In the event of failure of the spherical connecting block 6 and the hemispherical clamp 31 due to extreme working conditions, it can prevent the traction seat from immediately separating from the connecting end, thus giving the driver time for emergency response.

[0030] Working process: Before the tractor unit is connected to the trailer, the connecting mechanism is in standby mode. The parallel rod 41 in the limiting component 4 is pushed upward by the elastic force of the return spring 42, causing the transmission rack 24 to be located at the uppermost position of the rack groove 122. The telescopic rod 21 is in a retracted state through the cooperation of the external thread 212 and the threaded sleeve 22. The two clamping claws 3 are kept closed by the support of the flat clamping plate 213. The two hemispherical clamping plates 31 close to form a complete spherical receiving cavity, waiting for the spherical connecting block 6 to enter and lock. Block 411 applies a clamping force to the transmission gear 23; during docking, the tractor reverses, causing the connecting end of the trailer front end to gradually approach the traction seat. The fastening piece 7 fixed to the trailer connecting end gradually approaches the sleeve 44 of the limiting piece 4 as the tractor moves backward. The second inclined surface 711 on the U-shaped block 71 first contacts the first inclined surface 441 on the top surface of the sleeve 44. As the tractor continues to move backward, the second inclined surface 711 remains in place, applying a downward pushing force to the first inclined surface 441. Under the pushing force of the second inclined surface 711, the sleeve 44 drives the support... The strut 43 and parallel rod 41 move downwards against the elastic force of the return spring 42, compressing the return spring 42. The parallel rod 41 drives the transmission rack 24, which is fixedly connected to it, to move downwards synchronously. The transmission rack 24 descends along the rack groove 122 and enters the area of ​​the third mounting groove 123. When the transmission rack 24 descends, it drives the transmission gear 23, which meshes with it, to rotate. The transmission gear 23, through the limiting slider 232 in the slot 231, engages with the slide groove 211 on the telescopic rod 21, transmitting the rotational motion to the telescopic rod 21. During the rotation of the rod 21, the rotational motion is converted into axial extension motion through the thread engagement between the external thread 212 and the fixed threaded sleeve 22. The flat clamping plate 213 at the lower end of the telescopic rod 21 moves forward as the telescopic rod 21 extends, pushing the mounting bracket 32 ​​of the two clamping claws 3 to rotate outward around the short axis 321 and open. The two hemispherical clamping plates 31 open accordingly. At the same time as the two hemispherical clamping plates 31 open, the spherical connecting block 6 fixed on the trailer moves towards the hemispherical clamping plate 31 as the tractor moves backward.When the second inclined surface 711 of the U-shaped block 71 completely passes the first inclined surface 441 of the sleeve post 44, the downward pushing force on the first inclined surface 441 disappears, the return spring 42 releases its compression energy, and pushes the parallel rod 41, the transmission rack 24 and the sleeve post 44 upward to quickly return to their original positions. The transmission rack 24 moves upward and returns to its original position along with the parallel rod 41, driving the transmission gear 23 to rotate in the opposite direction. The transmission gear 23 drives the telescopic rod 21 to rotate in the opposite direction through the limit slider 232 and the slide groove 211. The telescopic rod 21 is in the threaded sleeve 22 Under the action of the telescopic rod 21, the flat clamp 213 moves backward as the telescopic rod 21 retracts, causing the mounting brackets 32 of the two clamping claws 3 to rotate inward and close around the short axis 321. The two hemispherical clamps 31 close, completely enclosing the maximum diameter of the spherical connecting block 6 within the enclosed spherical space, achieving the first layer of connection. During this process, the sleeve 44 moves upward and passes through the hole in the center of the U-shaped block 71, achieving the sleeve 44 and the U-shaped block 71 to engage, completing the second layer of connection.

[0031] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A quick-locking automatic reset connection mechanism for a tractor, comprising a traction seat and a connecting end that are mutually connected, characterized in that, The traction seat includes a first fixing mechanism (1), a transmission assembly (2), a clamping claw (3), and a limiting member (4). The transmission assembly (2), the clamping claw (3), and the limiting member (4) are all installed on the first fixing mechanism (1), and the limiting member (4) controls the opening and closing of the clamping claw (3) through the transmission assembly (2). The connecting end includes a second fixing mechanism (5), a spherical connecting block (6), and a fastening member (7). The spherical connecting block (6) is movably connected to the second fixing mechanism (5), and the spherical connecting block (6) is fixedly connected to the fastening member (7). After the traction seat and the connecting end are connected, the clamping claw (3) clamps the spherical connecting block (6) to achieve the first layer of connection, and the fastening member (7) is sleeved with the limiting member (4) to achieve the second layer of connection.

2. The quick-locking automatic reset connection mechanism for a tractor vehicle according to claim 1, characterized in that, The transmission assembly (2) includes a telescopic rod (21), a threaded sleeve (22), a transmission gear (23), and a transmission rack (24). The telescopic rod (21) is sleeved with the threaded sleeve (22), and one end of the telescopic rod (21) is movably connected to the transmission gear (23). One side of the transmission gear (23) meshes with the transmission rack (24).

3. The quick-locking automatic reset connection mechanism for a tractor according to claim 2, characterized in that, The transmission gear (23) has a slot (231) at its center. Limiting sliders (232) are provided at equal intervals on one side of the slot (231). The slot (231) is inserted into one end of the telescopic rod (21). The outer wall of the telescopic rod (21) near the slot (231) has a groove (211) that matches the limiting slider (232). The telescopic rod (21) is connected to the threaded sleeve (22) at the position where it is sleeved. The external thread (212) meshes with the threaded sleeve (22).

4. The quick-locking automatic reset connection mechanism for a tractor vehicle according to claim 3, characterized in that, The lower end of the telescopic rod (21) is connected to a flat clamping plate (213). Two flat clamping plates (213) are provided, and the two flat clamping plates (213) clamp one end of the clamping claw (3).

5. A quick-locking automatic reset connection mechanism for a tractor according to claim 4, characterized in that, The first fixing mechanism (1) is a T-shaped box structure, including a transverse mechanism (11) and a longitudinal mechanism (12). One end of the transverse mechanism (11) is fixedly connected to the side wall of the longitudinal mechanism (12). The transverse mechanism (11) has a first mounting groove (111) that matches the threaded sleeve (22), an active groove (112) for the movement of the flat clamping plate (213), and a second mounting groove (113) for mounting the clamping claw (3). The longitudinal mechanism (12) has a gear groove (121) for mounting the transmission gear (23), a rack groove (122) for mounting the transmission rack (24), and a third mounting groove (123) for mounting the limiting member (4). The third mounting groove (123) is connected to the gear groove (121), and the third mounting groove (123) located below the rack groove (122) is directly connected to the rack groove (122).

6. A quick-locking automatic reset connection mechanism for a tractor according to claim 5, characterized in that, The clamping claw (3) includes two symmetrically arranged hemispherical clamping plates (31) and a mounting bracket (32) arranged on the hemispherical clamping plates (31). The mounting bracket (32) is movably connected to the second mounting groove (113) through a short shaft (321). The side of the hemispherical clamping plate (31) away from the mounting bracket (32) is a curved flared opening.

7. A quick-locking automatic reset connection mechanism for a tractor vehicle according to claim 6, characterized in that, The limiting component (4) includes a parallel rod (41) movably connected to the third mounting groove (123), a return spring (42) sleeved on the parallel rod (41), a support rod (43) connected to the lower end of the parallel rod (41), and a sleeve (44) fixedly connected to the support rod (43). One end of the parallel rod (41) near the rack groove (122) is fixedly connected to the transmission rack (24), and a locking block (411) is fixedly connected to the upper end of the other side of the parallel rod (41). The return spring (42) is sleeved in the position where the parallel rod (41) is placed in the groove of the third mounting groove (123). The lower end of the return spring (42) abuts against the third mounting groove (123), and the upper end of the return spring (42) abuts against the locking block (411) or the transmission rack (24).

8. A quick-locking automatic reset connection mechanism for a tractor according to claim 7, characterized in that, The fastener (7) includes a U-shaped block (71) and a right-angle bracket (72). The right-angle bracket (72) is fixedly connected to the U-shaped block (71), and the U-shaped block (71) is connected to the support column (61) through the right-angle bracket (72).

9. A quick-locking automatic reset connection mechanism for a tractor according to claim 8, characterized in that, The top surface of the sleeve (44) is provided with a first inclined surface (441), which is oriented toward the fastener (7). A second inclined surface (711) is provided on one side of the U-shaped block (71), which matches the first inclined surface (441). The hole in the center of the U-shaped block (71) is larger than the diameter of the sleeve (44), and the thickness of the U-shaped block (71) is smaller than the height of the highest point of the sleeve (44).

10. A quick-locking automatic reset connection mechanism for a tractor according to claim 1, characterized in that, The spherical connecting block (6) is fixedly connected to a support column (61) on the side away from the traction seat. One end of the support column (61) extends into the second fixing mechanism (5). The support column (61) is provided with a limit plate (62) in the second fixing mechanism (5). Both sides of the limit plate (62) are provided with buffer springs (63).

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