Tractor traction rapid lifting hitching device and tractor

Abstract

The utility model relates to a tractor traction rapid lifting hitching device and a tractor, in particular to a tractor traction rapid lifting hitching device. Comprising a support, a traction assembly with one end rotationally connected to the support, at least one lifting rod with the lower end rotationally connected to the other end of the traction assembly, at least one locking hook with the upper end rotationally connected to the support and an operation assembly with the lower end connected to the middle end of one locking hook. The upper end of each lifting rod is used for being connected with a lifting arm of a tractor, the rotating axes of the upper ends of the locking hooks are coaxial, the lower ends of the locking hooks are connected with the traction assembly in a hanging mode at the same time, and a plurality of bolt holes used for being connected with a rear axle shell of the tractor are formed in the support in a penetrating mode. The projections of the multiple locking hooks are located in the transverse projection plane of the support. According to the tractor traction device, the technical problem that an existing tractor traction device is low in hooking efficiency can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of traction devices, in particular to a quick-lifting hitch device for tractor traction and a tractor. Background Art

[0002] The traction mechanism is a device for a tractor to hitch and tow agricultural implements or trailers. At present, most of the traction mechanisms are fixed or pendulum-type traction devices. The fixed traction plate is fixed on the tractor body, and the towing rod of the agricultural implement or trailer is fixed on the traction plate through a locking pin; the traction plate of the pendulum-type traction device can swing, which is helpful for straight driving and has good steering ability. However, it is generally fixed at the bottom of the rear suspension of the tractor and cannot be adjusted in height. When the driver hitchs the implement or trailer, the tractor needs to be adjusted to a suitable position first, then the implement is adjusted to a suitable height, and finally they are connected through a pin shaft. This causes the driver to repeatedly adjust the positions of the implement and the tractor traction point, which not only affects the operation efficiency but also increases the accident rate. Summary of the Utility Model

[0003] The utility model aims at the technical problem of the low hitching efficiency of the existing tractor traction device, and provides a quick-lifting hitch device for tractor traction and a tractor.

[0004] The technical solution for the utility model to solve the above technical problem is as follows:

[0005] On the one hand, the utility model provides a quick-lifting hitch device for tractor traction, which includes a bracket, a traction assembly rotatably connected to one end of the bracket, at least one lifting rod rotatably connected to the other end of the traction assembly at the lower end, at least one locking hook rotatably connected to the bracket at the upper end, and a control assembly connected to the middle end of one of the locking hooks at the lower end. The upper ends of the lifting rods are used to be connected with the lifting arms of the tractor. The upper rotation axes of the locking hooks are coaxial, and the lower ends simultaneously hitch the traction assembly. The bracket is provided with a plurality of bolt holes for connecting with the rear axle housing of the tractor in a penetrating manner, and the projections of the plurality of locking hooks are located within the horizontal projection plane of the bracket.

[0006] The beneficial effects of the present utility model are as follows: During the lifting operation of the lifting rod, the traction assembly rotates around the rotation axis where it is rotatably connected to the bracket, and a disengaging gap is formed between the locking hook and the bracket in terms of the hanging connection. Then, under the lifting of the control assembly, the locking hook is disengaged from the bracket. Subsequently, under the lowering of the lifting rod, the other end of the traction assembly moves downward relatively, so that the other end of the traction assembly can complete the operation of hooking the implement. When the implement is docked, all components act in the reverse direction until the traction assembly returns to its original position, completing the quick connection and improving the technical problem of the low connection efficiency of the existing tractor traction device. Compared with the connection method between the bracket and the horizontal side of the tractor rear axle housing, the bracket can be connected to the tractor rear axle housing upward through its bolt holes, occupying less installation space, and the disassembly and assembly of the bracket are more convenient. At the same time, the projection of the locking hook is located within the lateral projection plane of the bracket, resulting in less occupied space.

[0007] Based on the above technical solutions, the present utility model can be further improved as follows.

[0008] Further, the control assembly includes a fixing plate fixedly connected to the side wall of the bracket, a short shaft rotatably connected to one end of the fixing plate, and a pull shaft fixedly connected to the other end of the short shaft. The other end of the short shaft extends horizontally above the bracket, and the other end of the pull shaft is connected to the middle end of one of the locking hooks.

[0009] The beneficial effect of adopting the above further solution is that by the rotation of the short shaft, the pull shaft rotates around the central axis of the short shaft and pulls the locking hook to rotate, so that the locking hook is completely disengaged from the bracket.

[0010] Further, the control assembly further includes a rocker arm fixedly connected to one end of the short shaft and a tension spring with its lower end connected to the fixing plate. The middle end of the rocker arm is connected to the upper end of the tension spring.

[0011] The beneficial effect of adopting the above further solution is that when the short shaft rotates, the rocker arm rotates around the central axis of the short shaft against the pulling force of the tension spring; when the rotational force on the short shaft is removed, the rocker arm resets to enable the locking hook to reset and form a hanging connection with the bracket.

[0012] Further, the control assembly further includes two pull rods and a connecting plate. The two ends of the connecting plate are respectively fixedly connected to one ends of the two pull rods, and the other end of one of the pull rods is fixedly connected to the other end of the rocker arm.

[0013] The beneficial effect of adopting the above further solution is that the rocker arm can be pulled to rotate around the central axis of the short shaft by applying an upward force to the other end of the other pull rod.

[0014] Further, a vertical plate is fixed to the bracket, and the lower end of the vertical plate is fixedly connected to the bracket, while the upper end is provided with a plurality of bolt holes penetrating in the thickness direction for connecting with the rear axle housing of the tractor.

[0015] The beneficial effect of adopting the above further solution is that the bracket and the vertical plate are both bolt-connected to the rear axle housing of the tractor, which can ensure the stable installation of the entire traction quick-lift hitch device, and the disassembly and assembly of the vertical plate can be completed in front of the rear axle, making the operation convenient.

[0016] Further, a plurality of ear plates are fixed to one side of the vertical plate, and a long shaft is rotatably connected to the plurality of ear plates at the same time, and the upper ends of the locking hooks are fixedly connected to the long shaft at the same time.

[0017] The beneficial effect of adopting the above further solution is that through the connection of the ear plates, the long shaft is relatively far away from the bracket and the rear axle housing, reducing the space required for installing the long shaft on the rear axle housing.

[0018] Further, the traction assembly includes a traction frame, a traction shaft rotatably connected to one end of the traction frame, and a traction hook with one end connected to the other end of the traction frame. The lower ends of the lifting rods are rotatably connected to the other end of the traction frame. The traction shaft is connected to the bracket, the other end of the traction hook opens upward, and the lower ends of the locking hooks are simultaneously hooked to the middle part of the traction frame.

[0019] The beneficial effect of adopting the above further solution is that during the lifting operation of the lifting rod, the traction frame and the traction hook rotate simultaneously around the central axis of the traction shaft, the traction hook moves relatively upward, and a disengaging gap is formed between the locking hook and the bracket for hooking.

[0020] Further, a blocking block is installed on the traction frame. One end of the blocking block is rotatably connected to a pin shaft and is simultaneously inserted with a plug pin. The pin shaft is rotatably connected to the traction frame at the same time, and the plug pin is inserted into the traction frame at the same time. The other end of the blocking block extends to the upper opening of the traction hook.

[0021] The beneficial effect of adopting the above further solution is that before the traction hook is hooked and towed, the plug pin is taken out and the blocking block is rotated to open the opening of the traction hook; after the traction hook is hooked to the tractor, the blocking block is rotated in the reverse direction and the plug pin is inserted to prevent the tractor from falling off, improving the stability and reliability of the lifting traction device.

[0022] Further, a fixing pin is fixedly connected to the middle part of the traction frame, and the lower end of the locking hook is hooked to the fixing pin.

[0023] The beneficial effect of adopting the above further solution is that under the action of the traction shaft, the traction frame and the traction hook are kept in a balanced state by the hooking of the locking hook and the fixing pin.

[0024] Further, one end of the towing hook is rotatably connected to the towing frame, and a positioning hole is formed at one end of the towing hook. A limiting pin that can be inserted into the positioning hole is vertically provided on the towing frame.

[0025] The beneficial effect of adopting the above further solution is: By pulling out the limiting pin, the towing hook can swing left and right around the axis of its one end to adjust the hanging position and improve the hanging adaptability.

[0026] Further, each lifting rod is slidably connected with a cantilever, and one end of each cantilever is slidably connected to the corresponding lifting rod. The other end of each cantilever is used for connecting to the lifting arm of the tractor, and two avoiding grooves respectively opening upward and downward are formed in each cantilever; A limiting nut for abutting against the cantilever is threadedly connected to the top end of each lifting rod.

[0027] The beneficial effect of adopting the above further solution is: The upward-opening avoiding groove can prevent the cantilever from interfering with other devices when the lifting rod is lifted, and the downward-opening avoiding groove can prevent the cantilever from interfering with other devices when the lifting rod is lowered.

[0028] On the other hand, the present invention provides a tractor, including the tractor towing quick-lifting and hanging device described above, and further including a lifting arm slidably connected to the middle end of the lifting rod and a bracket connected to the rear axle housing. Description of the Drawings

[0029] Figure 1 Is an axonometric view of the tractor towing quick-lifting and hanging device of the present invention;

[0030] Figure 2 Is Figure 1 A partial enlarged view of;

[0031] Figure 3 Is Figure 1 A right part enlarged view of;

[0032] Figure 4 Is a use state diagram of the tractor towing quick-lifting and hanging device of the present invention, showing the state where the cantilever moves to the highest point;

[0033] Figure 5 Is a structural diagram of the towing assembly of the tractor towing quick-lifting and hanging device of the present invention;

[0034] Figure 6 Is a structural diagram of the bracket of the tractor towing quick-lifting and hanging device of the present invention;

[0035] Figure 7 Is a structural diagram of the towing frame of the towing assembly of the present invention;

[0036] Figure 8 This is the structural diagram of the cantilever of the present utility model.

[0037] In the accompanying drawings, the list of components represented by each reference numeral is as follows:

[0038] 1. Bracket; 11. Vertical plate; 12. Ear plate; 13. Long shaft; 14. Limit block;

[0039] 2. Traction assembly; 21. Traction frame; 22. Traction shaft; 23. Traction hook; 231. Plugging block; 232. Axle pin; 233. Plug pin; 24. Fixed pin; 25. Limit pin;

[0040] 3. Lifting rod; 31. Cantilever; 311. Avoidance groove; 312. Limit nut; 32. Rotating sleeve; 33. Limit nut;

[0041] 4. Locking hook;

[0042] 5. Control assembly; 51. Fixed plate; 52. Short shaft; 53. Pulling shaft; 531. Intermediate rod; 532. Bent shaft; 54. Rocker arm; 55. Pulling spring; 56. Pulling rod; 57. Connecting plate; 58. Positioning plate;

[0043] 6. Lifting arm. Specific embodiments

[0044] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present utility model and are not intended to limit the scope of the present utility model.

[0045] In the first aspect, the present utility model provides a tractor traction quick-lift hitch device, which is specifically described as follows.

[0046] Embodiment 1

[0047] As Figures 1 to 8 , a tractor traction quick-lift hitch device includes a bracket 1, a traction assembly 2 rotatably connected to one end of the bracket 1, at least one lifting rod 3 rotatably connected to the other end of the traction assembly 2 at the lower end, at least one locking hook 4 rotatably connected to the bracket 1 at the upper end, and a control assembly 5 connected to the middle end of one of the locking hooks 4 at the lower end. The upper ends of the lifting rods 3 are used to be connected to the lifting arm 6 of the tractor. The upper end rotation axes of the locking hooks 4 are coaxial, and the lower ends are simultaneously hooked to the traction assembly 2. The bracket 1 is provided with a plurality of bolt holes for connecting to the tractor rear axle housing in a penetrating manner, and the projections of the plurality of locking hooks 4 are located within the horizontal projection plane of the bracket 1.

[0048] The beneficial effects of this embodiment are as follows: The lifting rod 3 performs a lifting operation, causing the traction assembly 2 to rotate about its axis of rotational connection to the bracket 1. A disengaging gap is formed between the locking hook 4 and the bracket 1 in terms of the hanging connection. Further, under the lifting of the control assembly 5, the locking hook 4 is disengaged from the bracket 1. Then, under the lowering of the lifting rod 3, the other end of the traction assembly 2 moves downward relatively, so that the other end of the traction assembly 2 completes the operation of hanging the implement. When the implement is docked, each component moves in the reverse direction until the traction assembly 2 returns to its original position, completing the quick connection, and improving the technical problem of the relatively low connection efficiency of the existing tractor traction device. Compared with the connection method between the bracket 1 and the horizontal side of the tractor rear axle housing, the bracket 1 can be connected to the tractor rear axle housing upward through its bolt holes, occupying less installation space, and the disassembly and assembly of the bracket 1 are more convenient. At the same time, the projection of the locking hook 4 is located within the horizontal projection plane of the bracket 1, resulting in less occupied space.

[0049] The way that the bracket 1 is connected to the tractor rear axle housing upward through its bolt holes makes the overall volume of the hanging device formed by the bracket 1 and the traction assembly 2 relatively smaller.

[0050] Among them, the "horizontal projection plane" refers to the projection along the horizontal direction, and the projection image is located in the vertical plane. That is, for the projections along the same horizontal direction, the projections of multiple locking hooks 4 are located within the horizontal projection plane of the bracket 1.

[0051] Among them, as the specific driving methods of the lifting rod 3 and the control assembly 5, they can be lifted and lowered manually, or the lifting rod 3 and the control assembly 5 can be lifted and lowered by the lifting arm 6 of the tractor.

[0052] Such as Figure 5 and Figure 6 , the bracket 1 as a whole is a frame structure formed by welding three steel plates, in a downward-opening "U" shape, and the traction assembly 2 is installed within its opening. On the two inner walls of this opening, limiting blocks 14 are fixed, and these two limiting blocks 14 are used to abut and cooperate with one end side of the traction assembly 2.

[0053] Specifically, when the locking hook 4 is disengaged from the bracket 1 under the lifting of the control assembly 5, the end of the traction assembly 2 that is rotationally connected to the bracket 1 rotates relatively towards the limiting block 14. That is, the limiting block 14 limits the rotation of the traction assembly 2 to limit the length of the rotation path of the traction assembly 2.

[0054] On the limiting block 14, there is an inclined surface, which is used to cooperate and abut with the traction assembly 2.

[0055] As one of the parallel solutions of the above embodiment, the hooked part of the locking hook 4 opens towards the direction where the bracket 1 is located.

[0056] As the second parallel solution of the above embodiments, the hooked portion of the locking hook 4 opens in a direction away from the bracket 1.

[0057] Embodiment 2

[0058] As Figures 1 to 3 , on the basis of Embodiment 1, the control assembly 5 includes a fixing plate 51 fixedly connected to the side wall of the bracket 1, a short shaft 52 rotatably connected to one end of the fixing plate 51, and a pull shaft 53 fixedly connected to the other end of the short shaft 52. The other end of the short shaft 52 extends horizontally above the bracket 1, and the other end of the pull shaft 53 is connected to the middle end of one of the locking hooks 4.

[0059] The beneficial effect of adopting the preferred solution in the above embodiment is that by the rotation of the short shaft 52, the pull shaft 53 rotates around the central axis of the short shaft 52 and pulls the locking hook 4 to rotate, so that the locking hook 4 is completely disengaged from the bracket 1.

[0060] As a parallel solution of the above embodiments, the fixing plate 51 can also be fixedly connected to the tractor housing.

[0061] On the basis of the above embodiment, the pull shaft 53 includes an intermediate rod 531 fixedly connected to the other end of the short shaft 52 and a bent shaft 532 rotatably connected to the other end of the intermediate rod 531. U-shaped clips are fixedly connected to both ends of the bent shaft 532. One of the U-shaped clips is rotatably connected to the other end of the intermediate rod 531, and the other U-shaped clip is rotatably connected to the back of the middle end of the locking hook 4.

[0062] The rotation of the short shaft 52 causes the intermediate rod 531 to rotate around the central axis of the short shaft 52. While the bent shaft 532 rotates relative to the intermediate rod 531, the bent shaft 532 pulls the locking hook 4 to rotate.

[0063] Among them, the intermediate rod 531 is integrally in an "L" shape, and through holes are provided at the other end and the middle end thereof, so that one of the U-shaped clips can be rotatably connected to different through holes to change the initial angle of the bent shaft 532 relative to the locking hook 4, so as to adjust the rotation angle of the locking hook 4 under the premise of the same rotation angle of the short shaft 52.

[0064] Embodiment 3

[0065] As Figures 1 to 3 , on the basis of Embodiments 1 and 2, the control assembly 5 further includes a rocker arm 54 fixedly connected to one end of the short shaft 52 and a tension spring 55 with the lower end connected to the fixing plate 51. The middle end of the rocker arm 54 is connected to the upper end of the tension spring 55.

[0066] The beneficial effect of adopting the preferred solution in the above embodiment is that when the short shaft 52 rotates, the rocker arm 54 overcomes the tension of the tension spring 55 and rotates around the short shaft 52 as the central axis; and when the rotational force on the short shaft 52 is disconnected, the rocker arm 54 resets to enable the locking hook 4 to reset and form a connection to the bracket 1. When in use, applying a force to the other end of the rocker arm 54 can cause the rocker arm 54 to rotate.

[0067] Among them, the rocker arm 54 is integrally in an "L" shape, and its middle end is bent downward and connected to the upper end of the tension spring 55.

[0068] Embodiment 4

[0069] As Figures 1 to 3 , on the basis of Embodiments 1-3, the control assembly 5 further includes two tie rods 56 and a connecting plate 57. The two ends of the connecting plate 57 are respectively fixedly connected to one end of the two tie rods 56, and the other end of one of the tie rods 56 is fixedly connected to the other end of the rocker arm 54.

[0070] The beneficial effect of adopting the preferred solution in the above embodiment is that by applying an upward force to the other end of the other tie rod 56, the rocker arm 54 can be pulled to rotate around the short shaft 52 as the central axis.

[0071] On the basis of the above embodiment, a positioning plate 58 is sleeved on the other tie rod 56, and the tie rod 56 is slidably connected to the positioning plate 58. The positioning plate 58 is fixedly connected to the tractor housing, so that the other tie rod 56 can only slide up and down through the positioning plate 58.

[0072] Embodiment 5

[0073] As Figure 2 and Figure 3 , on the basis of Embodiments 1-4, the bracket 1 is fixed with a vertical plate 11, and the lower end of the vertical plate 11 is fixedly connected to the bracket 1, and the upper end is provided with a plurality of bolt holes for connecting to the tractor rear axle housing through the thickness direction.

[0074] The beneficial effect of adopting the preferred solution in the above embodiment is that the bracket 1 and the vertical plate 11 are simultaneously bolted to the tractor rear axle housing, which can ensure the stable installation of the entire traction quick lift hitch device, and the disassembly and assembly of the vertical plate 11 can be completed in front of the rear axle, which is convenient for operation.

[0075] Embodiment 6

[0076] As Figure 3 and Figure 5 , on the basis of Embodiments 1-5, a plurality of ear plates 12 are fixed on one side of the vertical plate 11. The plurality of ear plates 12 are simultaneously rotatably connected to a long shaft 13, and the upper ends of the locking hooks 4 are simultaneously fixedly connected to the long shaft 13.

[0077] The beneficial effect of adopting the preferred solution in the above embodiment is that through the connection of the ear plates 12, the long shaft 13 is relatively far away from the bracket 1 and the rear axle housing, reducing the space required for installing the long shaft 13 on the rear axle housing.

[0078] As a specific solution of the above embodiment, the number of the ear plates 12 can be two, three, four, etc. In the figure, two ear plates 12 are shown at intervals, and rotation holes for the long shaft 13 to pass through and rotate are formed therethrough.

[0079] As an alternative solution of the above embodiment, a pressing groove is formed on the lower side of the ear plate 12, and an interface groove with an upward opening is formed on the towing frame 21 of the towing assembly 2. The pressing groove and the interface groove cooperate to form radial and circumferential limits for the long shaft 13, completing the installation of the long shaft 13.

[0080] Based on the above embodiment, locking hooks 4 are connected to both ends of the long shaft 13, and the upper ends of the locking hooks 4 are fixedly connected to the long shaft 13 by screws.

[0081] Bearings are fixed on the long shaft 13 to reduce rotational friction.

[0082] Embodiment 7

[0083] Such as Figure 2 、 Figure 5 And Figure 7 , on the basis of Embodiments 1-6, the towing assembly 2 includes a towing frame 21, a towing shaft 22 rotatably connected to one end of the towing frame 21, and a towing hook 23 with one end connected to the other end of the towing frame 21. The lower ends of the lifting rods 3 are rotatably connected to the other end of the towing frame 21. The towing shaft 22 is connected to the bracket 1. The other end of the towing hook 23 has an upward opening, and the lower ends of the locking hooks 4 are simultaneously hooked to the middle of the towing frame 21.

[0084] The beneficial effect of adopting the preferred solution in the above embodiment is that when the lifting rod 3 performs a lifting operation, the towing frame 21 and the towing hook 23 simultaneously rotate about the central axis of the towing shaft 22, the towing hook 23 moves relatively linearly, and a disengaging gap is formed between the locking hook 4 and the hooking of the bracket 1.

[0085] Among them, the rotation axis of the lifting rod 3 and the towing frame 21 is relatively close to the end of the towing hook 23.

[0086] Embodiment 8

[0087] Such as Figure 2 、 Figure 5 And Figure 7, on the basis of Embodiments 1-7, a blocking block 231 is installed on the traction frame 21. One end of the blocking block 231 is rotatably connected to a shaft pin 232 and is simultaneously inserted with a plug pin 233. The shaft pin 232 is simultaneously rotatably connected to the traction frame 21, and the plug pin 233 is simultaneously inserted into the traction frame 21. The other end of the blocking block 231 extends to the upper opening of the traction hook 23.

[0088] The beneficial effect of adopting the preferred solution in the above embodiment is that before the traction hook 23 is hooked and towed, the plug pin 233 is taken out and the blocking block 231 is rotated to open the opening of the traction hook 23; after the traction hook 23 is hooked to the tractor, the blocking block 231 is rotated in the reverse direction and the plug pin 233 is inserted to prevent the tractor from falling off, improving the stability and reliability of the lifting and traction device.

[0089] Embodiment 9

[0090] As Figure 2 、 Figure 5 and Figure 7 , on the basis of Embodiments 1-8, a fixing pin 24 is fixedly connected to the middle end of the traction frame 21, and the lower end of the locking hook 4 is hooked to the fixing pin 24.

[0091] The beneficial effect of adopting the preferred solution in the above embodiment is that under the action of the traction shaft 22, by hooking the locking hook 4 and the fixing pin 24, the traction frame 21 and the traction hook 23 are kept in a balanced state.

[0092] As one of the specific solutions of the above embodiment, the fixing pin 24 is two separate coaxial pin rods, which are respectively fixedly connected to both sides of the traction frame 21 to respectively realize the hooking of the two locking hooks 4.

[0093] As the second specific solution of the above embodiment, the fixing pin 24 is a pin rod that simultaneously penetrates both sides of the traction frame 21.

[0094] Embodiment 10

[0095] As Figure 2 、 Figure 5 and Figure 7 , on the basis of Embodiments 1-9, one end of the traction hook 23 is rotatably connected to the traction frame 21, and a positioning hole is provided at one end of the traction hook 23. The traction frame 21 is vertically provided with a limit pin 25 that can be inserted into the positioning hole.

[0096] The beneficial effect of adopting the preferred solution in the above embodiment is that by pulling out the limit pin 25, the traction hook 23 can swing left and right around the axis of one end thereof to adjust the hooking position and improve the hooking adaptability.

[0097] Embodiment 11

[0098] As Figure 1, Figure 4 and Figure 8 , on the basis of Embodiments 1 - 10, each lifting rod 3 is slidably connected with a cantilever 31, and one end of each cantilever 31 is slidably connected to the corresponding lifting rod 3, the other end of each cantilever 31 is used for connecting with the lifting arm 6 of the tractor, and each cantilever 31 is provided with two avoiding grooves 311 respectively opening upward and downward; the top end of each lifting rod 3 is threadedly connected with a limit nut 33 for abutting against the cantilever 31.

[0099] The beneficial effect of adopting the preferred solution in the above embodiment is that the upward - opening avoiding groove 311 can prevent the cantilever 31 from interfering with other devices when the lifting rod 3 is lifted, and the downward - opening avoiding groove 311 can prevent the cantilever 31 from interfering with other devices when the lifting rod 3 is lowered. And the limit nut 33 is used to prevent the cantilever 31 and the rotating sleeve 32 from disengaging from the lifting rod 3 simultaneously.

[0100] On the basis of the above embodiment, a rotating sleeve 32 is fixedly connected to one end of each cantilever 31, and the rotating sleeve 32 is provided with a through - hole for the vertical sliding of the lifting rod 3, so that the cantilever 31 is slidably connected to the lifting rod 3 through the rotating sleeve 32.

[0101] On the basis of the above embodiment, at least two limit nuts 33 are simultaneously threadedly connected to the top of the same lifting rod 3.

[0102] On the basis of the above embodiment, at least two U - shaped bolts are fixedly connected to the other end of each cantilever 31, and the lifting arm 6 is fixedly connected within the plurality of U - shaped bolts.

[0103] In a second aspect, the present utility model provides a tractor, which is specifically described as follows.

[0104] Embodiment 12

[0105] A tractor includes a tractor traction quick - lift hitch device as described in Embodiments 1 - 11, and further includes a lifting arm 6 slidably connected to the middle end of the lifting rod 3 and a bracket 1 connected to the rear axle housing.

[0106] When it is necessary to hitch a farming implement, first, the lifting arm 6 drives the cantilever 31 to rotate. When the cantilever 31 rotates and rises to the position of the limit nut 33, it drives the lifting rod 3 to lift. At this time, the lower - end traction assembly 2 of the lifting rod 3 rotates around the traction shaft 22. When it rotates to the position where there is a disengaging gap between the fixed pin 24 and the locking hook 4, stop. At this time, pull the pull rod 56 upward, so that the pull shaft 53 rotates around the short shaft 52. At this time, the pull shaft 53 pulls the locking hook 4 to rotate around the long shaft 13 under force. At this time, the locking hook 4 disengages from the fixed pin 24, and the traction constraint is released, and then it starts to descend.

[0107] When the traction assembly 2 descends to a proper position through the cantilever 31, hitch the implement. When the docking of the implement is completed, the cantilever 31 drives the lifting rod 3 to lift in the same manner. When it reaches a proper position, pull the pull rod 56 upward again. When the fixing pin 24 is in place, release the pull rod 56 to complete the quick hitch.

[0108] To avoid interference when moving to the extreme position, the cantilever 31 is optimized with an "S" shape design. When the lifting arm 6 is lifted to the maximum height, the upper avoidance groove 311 avoids interference with other devices above; when the lifting arm 6 descends to the lowest point, the lower avoidance groove 311 avoids interference with other devices below.

[0109] The functions of the suspension device and the quick hitch device do not interfere with each other: When the cantilever 31 is working and reaches the maximum lifting height, at this time the traction assembly 2 will be slightly lifted. When it reaches the highest lifting height, the limit block 14 in the bracket 1 has not reached the limit position of the traction assembly 2. This process will not have a substantial impact on any device. When moving to the maximum height (such as Figure 4 ), since the self-weight of the traction assembly 2 is relatively low compared to the working devices such as agricultural implements, the suspension device can provide sufficient torque to ensure its own working quality; when the cantilever 31 is working and reaches the minimum ground clearance height, in this process the traction assembly 2 will be firmly fixed on the bracket 1 through the combination of the fixing pin 24 and the locking hook 4. At this time, the cantilever 31 is still within the designed length range of the lifting rod 3.

[0110] In special cases: When docking with a special implement, open the locking hook 4, and the lifting arm 6 keeps descending until the traction assembly 2 reaches the limit block 14 of the bracket 1 (such as Figure 6 ). At this time, within the length range of the lifting rod 3 and under the action of the rotating sleeve 32, it is also possible to ensure no movement interference point and achieve the quick hitch function.

[0111] The utility model has at least the following beneficial effects:

[0112] 1. Most traditional traction devices are traction plates or pendulum tractions, which are fixed to the bottom of the tractor rear axle and cannot be adjusted in height. When the driver hitches an implement or a trailer, it seriously affects the operation efficiency. At the same time, the cost of the implement with adjustable lifting height in the market is relatively high, and the structure is complex with many operation steps, and it is also impossible to achieve the quick hitch of the traction mechanism. The utility model provides a tractor traction quick-lifting hitch device, which enables the hook to move in the vertical direction through the lifting of the lifting rod and the cooperation of the control assembly to solve the above problems, and the device has a stable structure, reliable operation, is linked with the lifting arm and does not affect each other, greatly improving the operation efficiency.

[0113] 2. The invention provides a tractor traction quick-lifting hitch device, which has the characteristics of high structural strength, high control precision and reliable operation.

[0114] 3. During the quick hitch process, the lifting rod 3 and the suspension device of the tractor can jointly use the suspension lifting arm to provide power, but the functions of the suspension device and the lifting rod 3 do not interfere with each other, and the suspension device can still work independently.

[0115] 4. Each cantilever 31 with two avoidance grooves 311 is designed in an "S" shape, which can avoid interference at the extreme positions and enhance the visual beauty.

[0116] 5. Each articulated connection can adopt pin shaft connection, which greatly improves the disassembly and assembly portability, and is designed with a universal interface, with a high universality rate, greatly reducing the difficulty of later optimization and upgrading.

[0117] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0118] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0119] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connection", "fix", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0120] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0121] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0122] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present utility model.

Claims

1. A quick-lift hitch device for tractor towing, characterized in that, It includes a bracket (1), a traction assembly (2) with one end rotatably connected to the bracket (1), at least one lifting rod (3) with the lower end rotatably connected to the other end of the traction assembly (2), at least one locking hook (4) with the upper end rotatably connected to the bracket (1), and a control assembly (5) with the lower end connected to the middle end of one of the locking hooks (4). The upper ends of the lifting rods (3) are used to be connected to the lifting arms (6) of a tractor. The upper rotation axes of the locking hooks (4) are coaxial, and the lower ends simultaneously hook the traction assembly (2). The bracket (1) is provided with a plurality of bolt holes for connecting to the rear axle housing of the tractor in a penetrating manner, and the projections of the plurality of locking hooks (4) are located within the lateral projection plane of the bracket (1).

2. The quick lifting hitch device for tractor traction according to claim 1, characterized in that, The control assembly (5) includes a fixing plate (51) fixedly connected to the side wall of the bracket (1), a short shaft (52) with one end rotatably connected to the fixing plate (51), and a pull shaft (53) with one end fixedly connected to the other end of the short shaft (52). The other end of the short shaft (52) extends horizontally above the bracket (1), and the other end of the pull shaft (53) is connected to the middle end of one of the locking hooks (4).

3. The quick lifting hitch device for tractor traction according to claim 2, characterized in that, The control assembly (5) further includes a rocker arm (54) with one end fixedly connected to one end of the short shaft (52) and a tension spring (55) with the lower end connected to the fixing plate (51). The middle end of the rocker arm (54) is connected to the upper end of the tension spring (55).

4. The quick lift hitch device for tractor traction according to claim 3, characterized in that, The control assembly (5) further includes two pull rods (56) and a connecting plate (57). The two ends of the connecting plate (57) are respectively fixedly connected to one end of the two pull rods (56), and the other end of one of the pull rods (56) is fixedly connected to the other end of the rocker arm (54).

5. The quick lifting hitch device for tractor towing according to claim 1, characterized in that, The bracket (1) is fixed with a vertical plate (11), and the lower end of the vertical plate (11) is fixedly connected to the bracket (1), and the upper end is provided with a plurality of bolt holes for connecting to the rear axle housing of the tractor in a penetrating manner along the thickness direction.

6. The quick-lifting hitch device for tractor traction according to claim 5, characterized in that A plurality of ear plates (12) are fixed to one side of the vertical plate (11), and a long shaft (13) is rotatably connected to the plurality of ear plates (12) at the same time. The upper ends of the locking hooks (4) are fixedly connected to the long shaft (13) at the same time.

7. The quick-lift hitch device for tractor towing according to claim 1, characterized in that, The traction assembly (2) includes a traction frame (21), a traction shaft (22) rotatably connected to one end of the traction frame (21), and a traction hook (23) with one end connected to the other end of the traction frame (21). The lower ends of the lifting rods (3) are rotatably connected to the other end of the traction frame (21). The traction shaft (22) is connected to the bracket (1). The other end of the traction hook (23) opens upward, and the lower ends of the locking hooks (4) simultaneously hook the middle end of the traction frame (21).

8. The quick-lifting hitch device for tractor towing according to claim 7, characterized in that, The traction frame (21) is provided with a plugging block (231). One end of the plugging block (231) is rotatably connected to a shaft pin (232), and a latch pin (233) is inserted therein at the same time. The shaft pin (232) is rotatably connected to the traction frame (21) at the same time, and the latch pin (233) is inserted into the traction frame (21) at the same time. The other end of the plugging block (231) extends to the upper opening of the traction hook (23).

9. The quick lift hitch device for tractor towing according to claim 7, characterized in that, A fixing pin (24) is fixedly connected to the middle end of the traction frame (21), and the lower end of the locking hook (4) is hung on the fixing pin (24).

10. The quick lift hitch device for tractor traction according to claim 7, characterized in that, One end of the traction hook (23) is rotatably connected to the traction frame (21), and a positioning hole is formed in one end of the traction hook (23). A limit pin (25) capable of being inserted into the positioning hole is vertically provided on the traction frame (21).

11. A quick lift hitch device for tractor towing according to any one of claims 1-8, characterized in that, Each lifting rod (3) is slidably connected with a cantilever (31). One end of each cantilever (31) is slidably connected to the corresponding lifting rod (3). The other end of each cantilever (31) is used for connecting to the lifting arm (6) of a tractor, and two avoidance grooves (311) respectively opening upward and downward are formed in each cantilever (31). A limit nut (33) for abutting against the cantilever (31) is threadedly connected to the top end of each lifting rod (3).

12. A tractor, characterized in that, It includes a tractor traction quick-lifting hitch device according to any one of claims 1-11, and further includes a lifting arm (6) slidably connected to the middle end of the lifting rod (3) and a bracket (1) connected to the rear axle housing.

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