Tractor auxiliary clutch control mechanism

Abstract

The utility model discloses a tractor auxiliary clutch control mechanism relates to the technical field of agricultural machinery, solved the traditional auxiliary clutch's operating mode of ratchet handle, and the operation is laborious, and the operation is not in place frequently in frequent use, resulting in auxiliary clutch piece wear, burnout problem, wherein, the second rocker arm rotation is installed on the gearbox, and one end of first rocker arm is rotatably connected with the side surface of gearbox, and the clutch control of gearbox is realized through driving first rocker arm rotation, another end of first rocker arm and the first connecting rod end of second rocker arm are drivenly connected through first pull rod, and the locking mechanism is installed on the second rocker arm, when the ratchet handle is in the state of pulling up or putting down, the locking mechanism is matched with two locating points on the locating plate respectively, and the first spring energy storage power is used in the operation process, and the operation is light and labor saving, and the clamping position is equipped with at both ends of the operation stroke, and the operation can clearly feel whether the operation is in place, and effectively prevent the misoperation.

Description

Technical Field

[0001] This utility model relates to the technical field of agricultural machinery, and in particular to a tractor secondary clutch control mechanism. Background Technology

[0002] Currently, most mechanically driven tractors in China use dual-acting clutches. The main clutch controls the engagement and disengagement of power to the tractor's running gear, while the secondary clutch controls the engagement and disengagement of power to the tractor's power take-off (PTO). The higher the tractor's power, the larger the clutch size tends to be, resulting in increased operating force. Traditional secondary clutches use a ratchet handle, which is labor-intensive and often leads to improper operation during frequent use. This causes wear and burnout of the secondary clutch discs, making maintenance difficult and resulting in a persistently high rate of secondary clutch failures. Utility Model Content

[0003] The traditional ratchet handle operation of the secondary clutch, which is laborious and prone to misoperation during frequent use, leads to wear and burnout of the secondary clutch disc, making maintenance difficult and resulting in a high failure rate of the secondary clutch. The purpose of this utility model is to provide a secondary clutch control mechanism for tractors that uses spring energy storage to assist operation, making operation easier and less strenuous. Locking positions are provided at both ends of the operating stroke, allowing for clear feedback on whether the operation is in place, effectively preventing misoperation.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A tractor secondary clutch control mechanism includes: a gearbox 1 and a rear axle housing 8, wherein the gearbox 1 and the rear axle housing 8 are connected;

[0006] It also includes: a first rocker arm 2, a first pull rod 3, a second rocker arm 4, a positioning plate 5, a second pull rod 7, a ratchet handle 9, and a spring connecting rod. The positioning plate 5 is connected to the side of the gearbox 1, and the positioning plate 5 has two positioning points. The second rocker arm 4 is rotatably mounted on the gearbox 1, and the second rocker arm 4 has a first connecting rod end, a second connecting rod end, and a third connecting rod end. One end of the first rocker arm 2 is rotatably connected to the side of the gearbox 1, and the clutch control of the gearbox 1 is realized by driving the first rocker arm 2 to rotate. The other end of the first rocker arm 2 and the first connecting rod end of the second rocker arm 4 are connected by the first pull rod 3. The ratchet handle 9 and the second connecting rod end of the second rocker arm 4 are connected by the second pull rod 7. One end of the spring connecting rod is rotatably connected to the side of the gearbox 1, and the other end of the spring connecting rod is rotatably connected to the third connecting rod end of the second rocker arm 4.

[0007] It also includes a locking mechanism. The second rocker arm 4 is equipped with a locking mechanism. When the ratchet handle 9 is in the pulled-up or pulled-down state, the locking mechanism cooperates with two positioning points on the positioning plate 5 respectively.

[0008] The aforementioned tractor secondary clutch control mechanism further includes: a retaining ring 10 and a rotating shaft 11. The second rocker arm 4 is rotatably mounted on the side of the gearbox 1 via the rotating shaft 11. The retaining ring 10 is mounted on the end of the rotating shaft 11 and is used to limit the second rocker arm 4 on the rotating shaft 11.

[0009] The aforementioned tractor secondary clutch control mechanism includes a second rocker arm 4 comprising a first link, a second link, and a third link. One end of the first link is the first link end, one end of the second link is the second link end, and one end of the third link is the third link end. The first link, the second link, and the third link are located on the same plane. The other ends of the first link, the second link, and the third link are connected. A shaft through hole matching the rotating shaft 11 is provided at the connection point of the first link, the second link, and the third link.

[0010] The aforementioned tractor secondary clutch control mechanism further includes: a first screw 6, with both ends of the positioning plate 5 respectively mounted on the side of the gearbox 1 by a first screw 6, and the positioning plate 5 located between the first connecting rod and the side of the gearbox 1.

[0011] In the aforementioned tractor secondary clutch control mechanism, the positioning plate 5 has an arc-shaped structure, and the center of the positioning plate 5 coincides with the axis of the rotating shaft 11.

[0012] In the aforementioned tractor secondary clutch control mechanism, the locking mechanism is installed in the middle of the first connecting rod. The locking mechanism includes a second screw 18, a second spring 19, and a steel ball 20. The middle of the first connecting rod is provided with a threaded through hole. The second screw 18 is installed at the end of the threaded through hole. The second spring 19 and the steel ball 20 are both located in the threaded through hole. One end of the second spring 19 abuts against the second screw 18, and the other end of the second spring 19 abuts against the steel ball 20. The steel ball 20 abuts against the positioning plate 5.

[0013] In the aforementioned tractor secondary clutch control mechanism, the two positioning points of the positioning plate 5 are both limiting grooves that match the steel ball 20.

[0014] In the aforementioned tractor secondary clutch control mechanism, when the second rocker arm 4 rotates around the pivot 11, the steel ball 20 slides along the positioning plate 5; when the ratchet handle 9 is in the pulled-up or pulled-down state, the steel ball 20 is located in two positioning points respectively.

[0015] The aforementioned tractor secondary clutch control mechanism includes a spring linkage comprising: a third tie rod 12, a first spring 13, a retaining ring 14, a nut 15, a pin 16, and a fourth tie rod 17. One end of the third tie rod 12 is rotatably connected to the third link end of the second rocker arm 4. The other end of the third tie rod 12 is connected to one end of the first spring 13. The other end of the first spring 13 is connected to the retaining ring 14. The retaining ring 14 is fitted onto the fourth tie rod 17. The end of the fourth tie rod 17 is rotatably connected to the side of the gearbox 1. The nut 15 is mounted on the fourth tie rod 17, and the retaining ring 14 abuts against the nut 15. The pin 16 is mounted on the fourth tie rod 17 and is used to limit the nut 15.

[0016] In the aforementioned tractor secondary clutch control mechanism, one end of the first pull rod 3 is rotatably connected to the other end of the first rocker arm 2, and the other end of the first pull rod 3 is rotatably connected to the first connecting rod end of the second rocker arm 4.

[0017] In the aforementioned tractor secondary clutch control mechanism, one end of the second pull rod 7 is rotatably connected to the second link end of the second rocker arm 4, and the other end of the second pull rod 7 is rotatably connected to the eccentric shaft of the ratchet handle 9.

[0018] Because this utility model employs the aforementioned technology, it has the following positive effects compared to existing technologies:

[0019] (1) In this utility model, when it is necessary to disconnect the secondary clutch power, pull up the ratchet handle to drive the second rocker arm to rotate in the forward direction and store energy in the first spring. When it is necessary to engage the secondary clutch power, lower the ratchet arm and the first spring assists the second rocker arm to rotate in the reverse direction. During operation, the first spring stores energy to assist, making operation easy and effortless.

[0020] (2) In this utility model, the steel ball slides along the positioning plate during the reciprocating rotation of the second rocker arm; when the ratchet handle is in the state of being pulled up or put down, the steel ball is located in the two positioning points respectively; there are locking positions at both ends of the operating stroke, so that the operation can be clearly felt during operation, effectively preventing misoperation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a tractor secondary clutch control mechanism according to the present invention.

[0022] Figure 2 yes Figure 1 Local magnification in Figure 1 .

[0023] Figure 3 yes Figure 2 View A in the diagram.

[0024] Figure 4 yes Figure 1 Local magnification in Figure 2 .

[0025] In the attached diagram: 1. Gearbox; 2. First rocker arm; 3. First tie rod; 4. Second rocker arm; 5. Positioning plate; 6. First screw; 7. Second tie rod; 8. Rear axle housing; 9. Ratchet handle; 10. Snap ring; 11. Shaft; 12. Third tie rod; 13. First spring; 14. Retaining ring; 15. Nut; 16. Pin; 17. Fourth tie rod; 18. Second screw; 19. Second spring; 20. Steel ball. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0027] Please refer to Figures 1 to 4 As shown, a tractor secondary clutch control mechanism is illustrated, comprising: a gearbox 1 and a rear axle housing 8, which are connected to each other;

[0028] It also includes: a first rocker arm 2, a first pull rod 3, a second rocker arm 4, a positioning plate 5, a second pull rod 7, a ratchet handle 9, and a spring connecting rod. The positioning plate 5 is connected to the side of the gearbox 1, and the positioning plate 5 has two positioning points. The second rocker arm 4 is rotatably mounted on the gearbox 1, and the second rocker arm 4 has a first connecting rod end, a second connecting rod end, and a third connecting rod end. One end of the first rocker arm 2 is rotatably connected to the side of the gearbox 1, and the clutch control of the gearbox 1 is realized by driving the first rocker arm 2 to rotate. The other end of the first rocker arm 2 and the first connecting rod end of the second rocker arm 4 are connected by the first pull rod 3. The ratchet handle 9 and the second connecting rod end of the second rocker arm 4 are connected by the second pull rod 7. One end of the spring connecting rod is rotatably connected to the side of the gearbox 1, and the other end of the spring connecting rod is rotatably connected to the third connecting rod end of the second rocker arm 4.

[0029] It also includes a locking mechanism. The second rocker arm 4 is equipped with a locking mechanism. When the ratchet handle 9 is in the pulled-up or pulled-down state, the locking mechanism cooperates with two positioning points on the positioning plate 5 respectively.

[0030] Furthermore, in a preferred embodiment, it further includes: a retaining ring 10 and a rotating shaft 11, wherein the second rocker arm 4 is rotatably mounted on the side of the gearbox 1 via the rotating shaft 11, and the retaining ring 10 is mounted on the end of the rotating shaft 11, and the retaining ring 10 is used to limit the second rocker arm 4 on the rotating shaft 11.

[0031] Furthermore, in a preferred embodiment, the second rocker arm 4 includes: a first connecting rod, a second connecting rod, and a third connecting rod, one end of the first connecting rod being the first connecting rod end, one end of the second connecting rod being the second connecting rod end, and one end of the third connecting rod being the third connecting rod end; the first connecting rod, the second connecting rod, and the third connecting rod are located in the same plane; the other ends of the first connecting rod, the second connecting rod, and the third connecting rod are connected together; a rotating shaft through hole matching the rotating shaft 11 is provided at the connection point of the first connecting rod, the second connecting rod, and the third connecting rod.

[0032] Furthermore, in a preferred embodiment, it further includes: a first screw 6, with each end of the positioning plate 5 mounted on the side of the gearbox 1 by a first screw 6, and the positioning plate 5 located between the first connecting rod and the side of the gearbox 1.

[0033] Furthermore, in a preferred embodiment, the positioning plate 5 has an arc-shaped structure, and the center of the positioning plate 5 coincides with the axis of the rotating shaft 11.

[0034] Furthermore, in a preferred embodiment, a locking mechanism is installed in the middle of the first connecting rod. The locking mechanism includes a second screw 18, a second spring 19, and a steel ball 20. A threaded through hole is provided in the middle of the first connecting rod. The second screw 18 is installed at the end of the threaded through hole. The second spring 19 and the steel ball 20 are both located in the threaded through hole. One end of the second spring 19 abuts against the second screw 18, and the other end of the second spring 19 abuts against the steel ball 20. The steel ball 20 abuts against the positioning plate 5.

[0035] Furthermore, in a preferred embodiment, the preload of the second spring 19 can be further adjusted by rotating the second screw 18.

[0036] Furthermore, in a preferred embodiment, such as Figure 3 As shown, the gap between the first connecting rod and the positioning plate 5 is much smaller than the outer diameter of the steel ball 20, ensuring that the steel ball 20 is always located in the threaded through hole of the first connecting rod.

[0037] Furthermore, in a preferred embodiment, both positioning points of the positioning plate 5 are limiting grooves that match the steel ball 20.

[0038] Furthermore, in a preferred embodiment, when the second rocker arm 4 rotates around the pivot 11, the steel ball 20 slides along the positioning plate 5; when the ratchet handle 9 is in the pulled-up or pulled-down state, the steel ball 20 is located in the two positioning points respectively.

[0039] Furthermore, in a preferred embodiment, the spring linkage includes: a third pull rod 12, a first spring 13, a retaining ring 14, a nut 15, a pin 16, and a fourth pull rod 17. One end of the third pull rod 12 is rotatably connected to the third link end of the second rocker arm 4, and the other end of the third pull rod 12 is connected to one end of the first spring 13. The other end of the first spring 13 is connected to the retaining ring 14, which is sleeved on the fourth pull rod 17. The end of the fourth pull rod 17 is rotatably connected to the side of the gearbox 1. The nut 15 is installed on the fourth pull rod 17, and the retaining ring 14 abuts against the nut 15. The pin 16 is installed on the fourth pull rod 17 and is used to limit the nut 15.

[0040] Furthermore, in a preferred embodiment, the preload of the first spring 13 can be adjusted by rotating the nut 15.

[0041] Furthermore, in a preferred embodiment, pin 16 is mounted on the fourth tie rod 17, and pin 16 is used to limit the maximum adjustment distance of nut 15 on the fourth tie rod 17.

[0042] Furthermore, in a preferred embodiment, one end of the first pull rod 3 is rotatably connected to the other end of the first rocker arm 2, and the other end of the first pull rod 3 is rotatably connected to the first connecting rod end of the second rocker arm 4.

[0043] Furthermore, in a preferred embodiment, one end of the second pull rod 7 is rotatably connected to the second link end of the second rocker arm 4, and the other end of the second pull rod 7 is rotatably connected to the eccentric shaft of the ratchet handle 9.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model.

[0045] Based on the above, this utility model also has the following embodiments:

[0046] In a further embodiment of this utility model, when it is necessary to disengage the secondary clutch power, the ratchet handle 9 is pulled up, which drives the second rocker arm 4 to rotate in the forward direction, and the first spring 13 stores energy. When it is necessary to engage the secondary clutch power, the ratchet handle 9 is lowered, and the first spring 13 assists the second rocker arm 4 to rotate in the reverse direction. During the operation, the first spring 13 stores energy to assist, making the operation easy and effortless.

[0047] In a further embodiment of this utility model, during the reciprocating rotation of the second rocker arm 4, the steel ball 20 slides along the positioning plate 5; when the ratchet handle 9 is in the pulled-up or pulled-down state, the steel ball 20 is located in the two positioning points respectively; there are locking positions at both ends of the operating stroke, so that the operation can be clearly felt during operation, effectively preventing misoperation.

[0048] In a further embodiment of this utility model, the positioning plate 5 is provided with two positioning points, and the second rocker arm 4 is provided with a second screw 18, a second spring 19, and a steel ball 20. The steel ball 20 can rotate with the second rocker arm 4 and slide on the positioning plate 5 at the same time, locking when it slides to the two positioning points. The first spring 13 is compressed by tightening the nut 15 to store force in advance, and the preload of the first spring is less than that of the first rocker arm 2.

[0049] In a further embodiment of this utility model, when it is necessary to disengage the secondary clutch power: pull up the ratchet handle 9, the ratchet handle 9 drives the second pull rod 7, the second pull rod 7 drives the second rocker arm 4 to rotate, the second rocker arm 4 drives the third pull rod 12, the fourth pull rod 17, and the first pull rod 3, the third pull rod 12 and the fourth pull rod 17 gradually rotate, the lever arm of the first spring 13 begins to increase and the thrust increases, the ratchet handle 9 rotates against the force of the first rocker arm 2 with the help of the first spring 13, and rotates until the steel ball 20 slides to the positioning point, and the operation is completed;

[0050] In a further embodiment of this utility model, when the secondary clutch power needs to be engaged: the ratchet arm 9 is lowered, and the first rocker arm 2 uses its reverse force to overcome the first spring 13 to complete the reverse operation, rotating until the steel ball 20 slides to the other end positioning point, thus completing the operation. In this way, the first spring 13 can assist the operation during operation, achieving a labor-saving effect, and the locking force of the steel ball 20 on the positioning plate 5 clearly indicates whether the operation is in place.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tractor clutch control mechanism, characterized in that, include: The gearbox (1) and the rear axle housing (8) are connected; It also includes: a first rocker arm (2), a first pull rod (3), a second rocker arm (4), a positioning plate (5), a second pull rod (7), a ratchet handle (9), and a spring connecting rod. The side of the gearbox (1) is connected to the positioning plate (5), which has two positioning points. The second rocker arm (4) is rotatably mounted on the gearbox (1), and the second rocker arm (4) has a first connecting rod end, a second connecting rod end, and a third connecting rod end. One end of the first rocker arm (2) is rotatably connected to the side of the gearbox (1), and the clutch control of the gearbox (1) is realized by driving the first rocker arm (2) to rotate. The other end of the first rocker arm (2) and the first connecting rod end of the second rocker arm (4) are connected by the first pull rod (3). The ratchet handle (9) and the second connecting rod end of the second rocker arm (4) are connected by the second pull rod (7). One end of the spring connecting rod is rotatably connected to the side of the gearbox (1), and the other end of the spring connecting rod is rotatably connected to the third connecting rod end of the second rocker arm (4). It also includes a locking mechanism. The second rocker arm (4) is equipped with a locking mechanism. When the ratchet handle (9) is in the pulled-up or pulled-down state, the locking mechanism cooperates with the two positioning points on the positioning plate (5).

2. The tractor auxiliary clutch control mechanism according to claim 1, characterized in that, Also includes: A snap ring (10) and a rotating shaft (11) are provided. The second rocker arm (4) is rotatably mounted on the side of the gearbox (1) via the rotating shaft (11). The snap ring (10) is mounted on the end of the rotating shaft (11) and is used to limit the second rocker arm (4) on the rotating shaft (11).

3. The tractor auxiliary clutch control mechanism according to claim 2, characterized in that, The second rocker arm (4) includes: a first link, a second link and a third link, one end of the first link is the first link end, one end of the second link is the second link end, and one end of the third link is the third link end; the first link, the second link and the third link are located in the same plane; the other ends of the first link, the other ends of the second link and the other ends of the third link are connected; a rotating shaft through hole matching the rotating shaft (11) is opened at the connection of the first link, the second link and the third link.

4. The tractor clutch control mechanism according to claim 3, characterized in that, Also includes: The first screw (6) and the two ends of the positioning plate (5) are respectively installed on the side of the gearbox (1) by a first screw (6). The positioning plate (5) is located between the first connecting rod and the side of the gearbox (1).

5. The tractor auxiliary clutch control mechanism according to claim 4, characterized in that, The positioning plate (5) has an arc-shaped structure, and the center of the positioning plate (5) coincides with the axis of the rotating shaft (11).

6. The tractor auxiliary clutch control mechanism according to claim 5, characterized in that, The locking mechanism is installed in the middle of the first link. The locking mechanism includes a second screw (18), a second spring (19) and a steel ball (20). The middle of the first link is provided with a threaded through hole. The second screw (18) is installed at the end of the threaded through hole. The second spring (19) and the steel ball (20) are both located in the threaded through hole. One end of the second spring (19) abuts against the second screw (18), and the other end of the second spring (19) abuts against the steel ball (20). The steel ball (20) abuts against the positioning plate (5).

7. The tractor auxiliary clutch control mechanism according to claim 6, characterized in that, The two positioning points of the positioning plate (5) are both limiting grooves that match the steel ball (20); When the second rocker arm (4) rotates around the pivot (11), the steel ball (20) slides along the positioning plate (5); when the ratchet handle (9) is in the pulled-up or pulled-down state, the steel ball (20) is located in the two positioning points respectively.

8. The tractor auxiliary clutch control mechanism according to claim 7, characterized in that, The spring linkage includes: The third pull rod (12), the first spring (13), the retaining ring (14), the nut (15), the pin (16) and the fourth pull rod (17) are connected. One end of the third pull rod (12) is rotatably connected to the third link end of the second rocker arm (4). The other end of the third pull rod (12) is connected to one end of the first spring (13). The other end of the first spring (13) is connected to the retaining ring (14). The retaining ring (14) is sleeved on the fourth pull rod (17). The end of the fourth pull rod (17) is rotatably connected to the side of the gearbox (1). The nut (15) is installed on the fourth pull rod (17). The retaining ring (14) abuts against the nut (15). The pin (16) is installed on the fourth pull rod (17). The pin (16) is used to limit the nut (15).

9. The tractor auxiliary clutch control mechanism according to claim 8, characterized in that, One end of the first pull rod (3) is rotatably connected to the other end of the first rocker arm (2), and the other end of the first pull rod (3) is rotatably connected to the first connecting rod end of the second rocker arm (4).

10. The tractor auxiliary clutch control mechanism according to claim 9, characterized in that, One end of the second pull rod (7) is rotatably connected to the second link end of the second rocker arm (4), and the other end of the second pull rod (7) is rotatably connected to the eccentric shaft of the ratchet handle (9).

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