Tractor traction device

Abstract

The utility model relates to the technical field of tractors, in particular to a tractor traction device. Comprising a connecting piece and a traction frame fixedly installed on the connecting piece, a through hole is formed in the top of the traction frame, and a first limiting groove is formed in the bottom; an outer shell is fixedly installed at the top of the traction frame, a fixing pin capable of sliding up and down is installed in the outer shell, and the fixing pin is in sliding fit with the through hole and is connected with the first limiting groove in an inserted mode; the traction frame is further provided with a limiting mechanism used for preventing the fixing pin from moving downwards, and the limiting mechanism can be pushed by the traction part so that the fixing pin can fall downwards; through the structure, when the traction part on the agricultural implement is inserted into the traction frame, the limiting mechanism is pushed, so that the fixing pin is not limited by the limiting mechanism any more, the fixing pin automatically falls under the action of gravity, the effect of connecting the traction frame and the traction part is achieved, the process of manually inserting the fixing pin is simplified, and the labor intensity of workers is reduced. And the connection process is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of tractors, in particular to a tractor traction device. Background Art

[0002] A tractor is a self-propelled power machine mainly used for towing and driving working machinery to complete various mobile operations, and can also be used as a fixed working power. A traction device is often arranged at the rear of the tractor, and the traction device is used to connect a traction-type agricultural implement, and the hinge point connecting the implement is called a traction point.

[0003] The traction device of the existing tractor mainly includes a connecting piece for installing on the tractor and a "U"-shaped traction frame for connecting with the agricultural implement. When in use, the traction part on the agricultural implement needs to be inserted into the side of the traction frame, and then the two are hinged through a fixing pin. The above connection process is mainly divided into two steps. One is the alignment of the traction part and the traction frame, and the other is the manual installation of the fixing pin. The overall installation process is relatively cumbersome and affects the installation efficiency. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a tractor traction device to solve the problem that the installation process of the traction part and the traction frame in the prior art is relatively cumbersome and affects the installation efficiency.

[0005] The utility model is realized by the following technical solutions: A tractor traction device includes a connecting piece and a traction frame fixedly installed on the connecting piece. A through hole is provided at the top of the traction frame, and a first limiting groove is provided at the bottom; an outer shell is fixedly installed on the top of the traction frame, and a fixing pin capable of sliding up and down is installed in the outer shell. The fixing pin is in sliding fit with the through hole and is inserted into the first limiting groove; a limiting mechanism for blocking the fixing pin from moving downward is further installed on the traction frame, and the limiting mechanism can be pushed by the traction part so that the fixing pin can fall downward.

[0006] Through the above structure, when the traction part on the agricultural implement is inserted into the traction frame, it will push the limiting mechanism, so that the fixing pin is no longer restricted by the limiting mechanism, and thus automatically falls under the action of gravity, so as to realize the connection effect between the traction frame and the traction part, thus simplifying the process of manually inserting the fixing pin and making the connection process between the two more convenient.

[0007] Further, the limiting mechanism includes a limiting plate rotatably mounted on the traction frame. The limiting plate is located on the side of the fixed pin away from the opening of the traction frame. A torsion spring is installed between the limiting plate and the traction frame. The limiting plate is provided with a limiting portion that can abut against the fixed pin, and the bottom of the limiting plate can abut against the traction portion. Through the arrangement of the limiting plate, when the traction portion is inserted into the traction frame, it will drive the rotation of the limiting plate, so that the limiting portion no longer abuts against the fixed pin, and the fixed pin can fall down.

[0008] Further, the top of the traction frame is provided with a mounting hole communicating with the through hole. A second rotating shaft is rotatably mounted in the mounting hole. The second rotating shaft is fixedly connected to the limiting plate. When the limiting portion abuts against the fixed pin, the limiting portion is located in the mounting hole and the through hole. Through the above structure, when the traction frame and the traction portion are not yet assembled, the fixed pin can be located at a relatively upper position of the traction frame, thus preventing the entry of the traction portion due to the fixed pin being too low.

[0009] Further, the bottom of the fixed pin is provided with a second limiting groove, and the shape of the second limiting groove is matched with that of the limiting portion. The limiting portion can abut against the fixed pin through the second limiting groove. Through the arrangement of the second limiting groove, the cooperation between the limiting portion and the fixed pin is more convenient, and it will not affect the entry of the traction portion.

[0010] Further, a first rotating shaft is also rotatably mounted inside the outer housing. A lifting plate is fixedly mounted on the first rotating shaft. The lifting plate is provided with a lifting portion and a sliding groove. Two mounting plates are fixedly mounted on the top of the fixed pin, and a fixed column is fixedly mounted between the mounting plates. The lifting portion is located between the two mounting plates and below the fixed column. The lifting portion can abut against the fixed column, and the sliding groove is slidably matched with the fixed column. Through the arrangement of the lifting plate, when it is necessary to disassemble the traction frame and the traction portion, only by rotating the first rotating shaft can the fixed pin be lifted through the lifting portion, thus making the disassembly of the traction frame and the traction portion more convenient.

[0011] Further, a rotating handle is also fixedly mounted on the first rotating shaft. The rotating handle is located outside the outer housing, and a threaded sleeve is installed at one end of the rotating handle away from the first rotating shaft. Through the arrangement of the rotating handle, it is easier for the operator to rotate the first rotating shaft.

[0012] Further, a spring is fixedly installed at the top inside the threaded sleeve, and a limiting block is fixedly installed at the bottom of the spring. The limiting block is slidably engaged with the inside of the threaded sleeve. A limiting hole is provided on the outer shell, and the limiting block can be inserted into the limiting hole. Through the arrangement of the limiting hole and the limiting block, when the fixing pin falls, the limiting block can just move to the position of the limiting hole, thereby realizing the locking of the rotating handle, preventing the fixing pin from shaking due to the shaking of the rotating handle during the working process, and thus improving the stability of the device during use.

[0013] Further, the limiting block is in a "T" shape, and a baffle for preventing the limiting block from detaching from the threaded sleeve is further provided at the bottom of the threaded sleeve. Through the arrangement of the baffle, the limiting block is prevented from detaching from the threaded sleeve, further improving the stability of the device.

[0014] Further, an external thread is provided on the threaded sleeve, and an internal threaded hole matching the threaded sleeve is provided on the rotating handle, and the threaded sleeve is engaged with the internal threaded hole. Through the arrangement of the threaded sleeve and the threaded hole, when it is necessary to lift the fixing pin, by rotating the threaded sleeve, the limiting block is disengaged from the limiting hole, thereby realizing the unlocking of the rotating handle.

[0015] Further, the end of the traction frame far from the connecting member is chamfered, that is, the opening of the traction frame is enlarged. Through the chamfering treatment, the opening of the traction frame is enlarged, so that the traction part is more easily inserted into the traction frame.

[0016] In summary, the beneficial effects of the present utility model are as follows:

[0017] 1. Through the arrangement of the limiting plate, when the traction part is inserted into the traction frame of the device, the fixing pin can automatically fall, thereby reducing manual intervention, making the device more convenient to use, and improving the installation efficiency of the traction frame and the traction part.

[0018] 2. Through the arrangement of the rotating handle, when it is necessary to disassemble the traction frame and the traction part, the lifting plate can be conveniently rotated to lift the fixing pin. Moreover, the arrangement of the limiting block on the rotating handle prevents the fixing pin from shaking up and down during the production process of the tractor when the fixing pin is locked, making the connection of the device more stable. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 is a right view of the present utility model (without the mounting frame and the connecting member);

[0021] Figure 3 is Figure 2 a cross-sectional view at the position of "A - A" in

[0022] Figure 4 Schematic diagram of the internal structure of the outer housing

[0023] Figure 5 Schematic diagram of the structure of the turning handle

[0024] Figure 6 is Figure 5 Cross-sectional view at the position of "B - B" in

[0025] In the figure: 1 - mounting bracket; 11 - connecting piece; 12 - reinforcing rib; 2 - towing bracket; 21 - first limiting groove; 3 - outer housing; 31 - first rotating shaft; 32 - turning handle; 33 - threaded sleeve; 331 - spring; 332 - limiting block; 34 - limiting hole; 35 - fixing pin; 351 - through hole; 352 - second limiting groove; 353 - sliding cavity; 354 - mounting block; 355 - mounting plate; 356 - fixing column; 36 - limiting plate; 361 - limiting part; 362 - second rotating shaft; 363 - torsion spring; 364 - mounting hole; 37 - lifting plate; 371 - lifting part; 372 - sliding groove; 373 - mounting cavity; 38 - avoiding groove. Specific embodiments

[0026] The following will further describe in detail the specific embodiments of the present invention in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0027] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application 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 to the present application.

[0028] The following is a description of the preferred embodiments of the present invention in conjunction with the drawings.

[0029] Such as Figure 1 , Figure 2 , Figure 3As shown in the figure, the utility model provides a tractor traction device, which includes a connecting piece 11 fixedly installed on a tractor mounting bracket 1, and a number of reinforcing ribs 12 for strengthening the connection are provided on the connecting piece 11. A traction bracket 2 is fixedly installed at one end of the connecting piece 11 away from the mounting bracket 1. A through hole 351 is provided at the top of the traction bracket 2, and a first limiting groove 21 is provided at the bottom; a housing 3 is fixedly installed at the top of the traction bracket 2, and a mounting block 354 is fixedly installed inside the housing 3. A sliding cavity 353 is provided on the mounting block 354, and a fixed pin 35 that can slide up and down is slidably installed in the sliding cavity 353. The fixed pin 35 is slidably matched with the through hole 351 and inserted into the first limiting groove 21. A limiting mechanism is also installed on the traction bracket 2. When the traction part of the agricultural implement is not inserted into the traction bracket 2, the limiting mechanism can block the downward movement of the fixed pin 35. At this time, the fixed pin 35 is located at the top of the traction bracket 2. When the traction part is inserted into the traction bracket 2, the limiting mechanism will be pushed, so that the fixed pin 35 can fall down.

[0030] The limiting mechanism in this device can be any mechanism that realizes the above process. For example, a slider is provided in the middle of the traction piece. In the initial state, that is, when the traction part is not inserted, the top of the slider abuts against the bottom of the fixed pin 35. When the traction part is inserted, the slider will be pushed in the direction away from the "U" - shaped opening of the traction bracket, so that the slider is separated from the fixed pin 35. When the traction part reaches the position, the fixed pin 35 will fall down to connect the traction bracket 2 and the traction part. In this embodiment, the limiting mechanism includes a limiting plate 36 rotatably installed on the traction bracket 2. The limiting plate 36 is located on the side of the fixed pin 35 away from the opening of the traction bracket 2. A torsion spring 363 is installed between the limiting plate 36 and the traction bracket 2. A limiting part 361 that can abut against the fixed pin 35 is provided on the limiting plate 36, and the bottom of the limiting plate 36 can abut against the traction part.

[0031] Specifically, an installation hole 364 communicating with the through hole 351 is provided at the top of the traction frame 2. A second rotating shaft 362 is rotatably installed in the installation hole 364, and the second rotating shaft 362 is fixedly connected to the limiting plate 36. A second limiting groove 352 is provided at the bottom of the fixing pin 35, and the shape of the second limiting groove 352 matches that of the limiting portion 361. The limiting portion 361 can abut against the fixing pin through the second limiting groove 352. In the initial state, the end of the limiting portion 361 away from the second rotating shaft 362 is located in the second limiting groove 352, and the falling of the fixing pin 35 is blocked by the support of the torsion spring 363. When the traction portion is inserted, the traction portion will push the bottom of the limiting plate 36, causing it to rotate around the second rotating shaft 362. At this time, the fixing pin 35 has no support. When the traction portion reaches the position, the fixing pin 35 will fall, connecting the traction frame 2 and the traction portion. When it is necessary to disassemble the traction frame 2 from the traction portion, only need to lift the fixing pin 35 to the initial position, and then withdraw the traction portion. At this time, the limiting plate 36 will return to the initial position under the action of the torsion spring 363 to limit the fixing pin 35 again.

[0032] As Figure 3 、 Figure 4 shown, an installation cavity 373 communicating with the sliding cavity 353 is also provided on the installation block 354. A first rotating shaft 31 is rotatably installed in the installation cavity 373. A lifting plate 37 is fixedly installed on the first rotating shaft 31. The lifting plate 37 is provided with a lifting portion 371 and a sliding groove 372. Two installation plates 355 are fixedly installed on the top of the fixing pin 35. A fixing column 356 is fixedly installed between the installation plates 355. The lifting portion 371 is located between the two installation plates 355 and below the fixing column 356. The lifting portion 371 can abut against the fixing column 356, and the sliding groove 372 is slidably matched with the fixing column 356.

[0033] When the fixing pin 35 slides downward, the fixing column 356 will fall into the sliding groove 372 and drive the lifting plate 37 to rotate. When it is necessary to lift the fixing pin 35, only need to rotate the lifting plate 37 in the reverse direction. At this time, the lifting portion 371 will push the fixing column 356 upward, so that the fixing pin 35 moves. In addition, an avoidance groove 38 for preventing the lifting portion 371 from rotating is also provided on the inner side of the outer housing 3.

[0034] As Figure 1 、 Figure 5 shown, in order to be able to rotate the lifting plate 37 better, a rotating handle 32 is also fixedly installed on the first rotating shaft 31. The rotating handle 32 is located outside the outer housing 3, and a threaded sleeve 33 is installed at the end of the rotating handle 32 away from the first rotating shaft 31. Here, the threaded sleeve 33 is only for the operator to better hold the rotating handle 32 for rotation.

[0035] As Figure 5 、 Figure 6As shown in the figure, a spring 331 is fixedly installed at the top inside the threaded sleeve 33. A limit block 332 is fixedly installed at the bottom of the spring 331. The limit block 332 is slidably engaged with the inside of the threaded sleeve 33. A limit hole 34 is provided on the outer housing 3, and the limit block 332 can be inserted into the limit hole 34. Specifically, the limit block 332 is in a "T" shape, and a baffle for preventing the limit block 332 from detaching from the threaded sleeve 33 is further provided at the bottom of the threaded sleeve 33. The threaded sleeve 33 is provided with an external thread, and the handle 32 is provided with an internal threaded hole that matches the threaded sleeve. The threaded sleeve 33 is engaged with the internal threaded hole.

[0036] When the fixing pin 35 moves downward, the fixing pin 35 will drive the lifting plate 37 to rotate. The rotation of the lifting plate 37 will drive the rotation of the handle 32. When the limit block 332 on the handle 32 rotates to the position of the limit hole 34, under the action of the spring 331, the limit block 332 will be inserted into the limit hole 34. When it is necessary to lift the fixing pin 35, first rotate the threaded sleeve 33 so that the threaded sleeve 33 drives the limit block 332 to disengage from the limit hole 34. At this time, turn the handle 32 back to the initial position, and then rotate the threaded sleeve 33 in the reverse direction. At this time, the threaded sleeve 33 moves towards the direction close to the outer housing 3, and the limit block 332 will also be squeezed back into the threaded sleeve 33 again, thus facilitating the next use.

[0037] As Figure 1 shown, for further illustration of this embodiment, in order to enable the traction part to better enter the traction frame 2, chamfering is performed at the end of the traction frame 2 away from the connecting part 11, that is, the opening of the traction frame 2 is enlarged.

[0038] The working principle of this device is as follows: When it is necessary to install agricultural implements on a tractor, insert the traction part on the agricultural implement into the middle of the "U"-shaped traction frame 2. During the insertion process, the traction part will push the limit plate 36 to rotate, so that the limit part 361 disengages from the second limit groove 352. When the connection hole on the traction part is aligned with the through hole 351, the fixing pin will pass through the through hole 351 and the connection hole and fall into the first limit groove 21, thereby connecting the traction part and the traction frame 2. When the fixing pin 35 falls, the handle 32 will also rotate accordingly. When it is necessary to disassemble the two, only need to rotate the threaded sleeve 33. When the limit block 332 disengages from the limit hole 34, rotate the handle 32 to return it to the initial position, and then restore the threaded sleeve 33 to its original position to complete the separation of the tractor and the agricultural implement.

[0039] In summary, for a tractor towing device of the present utility model, through the arrangement of the limit plate 36, when the towing part is inserted into the towing frame 2 of the device, the fixing pin 35 can automatically fall, thereby reducing manual intervention and making the device more convenient to use, improving the installation efficiency of the towing frame 2 and the towing part. Through the arrangement of the turning handle 32, when it is necessary to disassemble the towing frame 2 and the towing part, the lifting plate 37 can be conveniently rotated to lift the fixing pin 35. Moreover, the arrangement of the limit block 332 on the turning handle prevents the fixing pin 35 from shaking up and down during the production process of the tractor when the fixing pin 35 is locked, thereby making the connection of the device more stable.

[0040] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the technical principle of the present utility model, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. A tractor traction device, comprising a connecting member (11) and a traction frame (2) fixedly mounted on the connecting member (11), wherein the traction frame (2) has a through hole (351) at the top and a first limiting groove (21) at the bottom; characterized in that: An outer shell (3) is fixedly mounted on the top of the traction frame (2), and a fixing pin (35) capable of sliding up and down is mounted inside the outer shell (3), and the fixing pin (35) is slidably matched with the through hole (351) and plugged into the first limiting groove (21); a limiting mechanism for preventing the fixing pin (35) from moving downward is also mounted on the traction frame (2), and the limiting mechanism can be pushed by the traction part so that the fixing pin (35) can fall downward.

2. The tractor pulling device according to claim 1, characterized in that: The limiting mechanism comprises a limiting plate (36) rotatably mounted on the traction frame (2); the limiting plate (36) is located on a side of the fixing pin (35) away from an opening of the traction frame (2); a torsion spring (363) is installed between the limiting plate (36) and the traction frame (2); a limiting portion (361) capable of abutting against the fixing pin (35) is provided on the limiting plate (36); and a bottom of the limiting plate (36) can abut against the traction portion.

3. The tractor pulling device according to claim 2, characterized in that: A mounting hole (364) communicating with the through hole (351) is provided at the top of the traction frame (2); a second rotating shaft (362) is rotatably mounted in the mounting hole (364); the second rotating shaft (362) is fixedly connected to the limiting plate (36); when the limiting portion (361) abuts against the fixing pin (35), the limiting portion (361) is located in the mounting hole (364) and the through hole (351).

4. The tractor pulling device according to claim 3, characterized in that: A second limiting groove (352) is provided at the bottom of the fixing pin (35), and the second limiting groove (352) matches the shape of the limiting portion (361), so that the limiting portion (361) can abut against the fixing pin through the second limiting groove (352).

5. The tractor pulling device according to claim 1, characterized in that: A first rotating shaft (31) is rotatably mounted inside the outer shell (3), a lifting plate (37) is fixedly mounted on the first rotating shaft (31), and a lifting portion (371) and a sliding groove (372) are provided on the lifting plate (37); two mounting plates (355) are fixedly mounted on the top of the fixing pin (35), a fixing column (356) is fixedly mounted between the mounting plates (355), the lifting portion (371) is located between the two mounting plates (355) and below the fixing column (356), the lifting portion (371) can be abutted against the fixing column (356), and the sliding groove (372) is slidably matched with the fixing column (356).

6. The tractor pulling device according to claim 5, characterized in that: A rotating handle (32) is also fixedly mounted on the first rotating shaft (31); the rotating handle (32) is located outside the outer shell (3); and a threaded sleeve (33) is mounted on one end of the rotating handle (32) away from the first rotating shaft (31).

7. The tractor pulling device according to claim 6, characterized in that: A spring (331) is fixedly mounted on the top of the inner side of the threaded sleeve (33), a limit block (332) is fixedly mounted on the bottom of the spring (331), the limit block (332) is slidably matched with the inner side of the threaded sleeve (33), a limit hole (34) is provided on the outer shell (3), and the limit block (332) can be plugged into the limit hole (34).

8. The tractor pulling device according to claim 7, characterized in that: The limiting block (332) is in a "T" shape, and a baffle capable of preventing the limiting block (332) from detaching from the threaded sleeve (33) is also provided at the bottom of the threaded sleeve (33).

9. The tractor pulling device according to claim 8, characterized in that: The threaded sleeve (33) is provided with an external thread, the rotating handle (32) is provided with an internal thread hole matching the threaded sleeve, and the threaded sleeve (33) is meshed with the internal thread hole.

10. The tractor pulling device according to any one of claims 1 to 9, characterized in that: One end of the traction frame (2) away from the connecting piece (11) is chamfered, that is, the opening of the traction frame (2) is enlarged.

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