Shifting fork rotating arm mechanism

Abstract

A shifting fork rotating arm mechanism comprises an upper rotating arm and a lower rotating arm, rotating shafts are arranged on the upper rotating arm and the lower rotating arm, a first guide groove is formed in the upper rotating arm, a second guide groove is formed in the lower rotating arm, and the first guide groove and the second guide groove are oppositely arranged; the guide groove I or the guide groove II is internally provided with a shifting fork operating rod end part, the two sides of the guide groove I are provided with limiting support parts, the limiting support parts are provided with limiting baffle plates, and the limiting baffle plates are arranged on the two sides of the guide groove II; the upper rotating arm is provided with a first shifting fork clamping piece, the lower rotating arm is provided with a second shifting fork clamping piece, and the first shifting fork clamping piece and the second shifting fork clamping piece are arranged in a staggered mode. The limiting baffle is arranged on the limiting supporting part, the rotating angle of the upper rotating arm and the rotating angle of the lower rotating arm are limited, the situation that the shifting fork operating rod is separated from the upper rotating arm or the lower rotating arm due to the fact that the shifting fork operating rod is shaken during operation or the operation strength of a farmer is too large is avoided, and the situation that the speed change mechanism jumps gears and disorderly gears occurs is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of agricultural machinery, in particular to a shift fork rotating arm mechanism. Background Art

[0002] When agricultural machinery is operating, due to the uneven ground, the gearbox's shift fork lever is easily separated from the rotating arm due to shaking, which will cause the speed change mechanism to skip gears or shift randomly.

[0003] In addition, when farmers use the shift fork lever, if they apply too much force, the shift fork lever will be separated from the rotating arm when the load is too large, which will also cause the speed change mechanism to skip gears or shift randomly.

[0004] To this end, our company has developed a "shift fork arm mechanism" that can operate the shift fork lever flexibly and stably. Utility Model Content

[0005] In response to the above problems, the present invention designs a shift fork rotating arm mechanism, comprising an upper rotating arm and a lower rotating arm, wherein the upper rotating arm and the lower rotating arm are provided with a rotating shaft, the upper rotating arm is provided with a first guide groove, and the lower rotating arm is provided with a second guide groove, wherein the first guide groove and the second guide groove are arranged opposite to each other;

[0006] The end of the shift fork operating rod is arranged in the guide groove 1 or the guide groove 2, and a limit support portion is provided on both sides of the guide groove 1. A limit baffle is provided on the limit support portion, and the limit baffle extends toward the guide groove 2. The limit baffle is arranged on both sides of the guide groove 2;

[0007] The upper rotating arm is provided with a first shift fork clamping member, and the lower rotating arm is provided with a second shift fork clamping member, and the first shift fork clamping member and the second shift fork clamping member are arranged alternately.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: by providing a rotating shaft on the upper rotating arm and the lower rotating arm, the upper rotating arm and the lower rotating arm can be rotated relative to each other, and by relatively arranging the guide groove 1 and the guide groove 2, the fork operating rod can be switched in the guide groove 1 or the guide groove 2. When the end of the fork operating rod is located in the guide groove 1, it can drive the upper rotating arm to rotate, and when the fork operating rod is located in the guide groove 2, it can drive the lower rotating arm to rotate. By providing a limit baffle on the limit support part, the limit baffle extends in the direction of the guide groove 2. , can be located on both sides of the guide groove 2, and can limit the rotation angle of the upper rotating arm and the lower rotating arm, to prevent the fork operating lever from shaking during operation or the farmer from operating too hard, causing the fork operating lever to separate from the upper rotating arm or the lower rotating arm. The fork operating lever drives the upper rotating arm or the lower rotating arm to rotate, and the fork clamping member 1 and the fork clamping member 2 are staggered, thereby driving the fork clamping member 1 or the fork clamping member 2 to rotate relative to each other on both sides of the rotating shaft, which can limit the rotation angle of the fork and avoid the speed change mechanism from skipping or disorderly gears.

[0009] Furthermore, the limit baffle is tiltedly arranged on the limit support portion, and the inclined surface of the limit baffle is engaged with and clamped by the side wall of the rotated lower rotating arm. The rotation angle of the upper rotating arm or the lower rotating arm is 15°-22°.

[0010] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by obliquely setting the limit baffle on the limit support part, it can match the side wall shape of the rotated lower rotating arm, and can limit the rotation angle of the upper rotating arm or the lower rotating arm. By setting the rotation angle of the upper rotating arm or the lower rotating arm to 15°-22°, it can prevent the end of the fork rod from disengaging from the guide groove 1 or the guide groove 2 when the rotation angle is too large, and avoid the speed change mechanism from skipping gears or mis-shifting gears.

[0011] Furthermore, the upper rotating arm is provided with a first rotating hole, the lower rotating arm is provided with a second rotating hole, and the rotating shaft is provided in the first rotating hole and the second rotating hole;

[0012] Preferably, the center of the first rotating hole and the center of the first guide groove are located on the same horizontal line, and the center of the second rotating hole and the center of the second guide groove are located on the same horizontal line.

[0013] The beneficial effects of adopting the above-mentioned further technical solution are: through the rotating hole 1 set on the rotating arm and the rotating hole 2 of the lower rotating arm, the upper rotating arm and the lower rotating arm can be rotated relative to each other around the rotating shaft. By the center of the rotating hole 1 and the center of the guide groove 1 being on the same horizontal line, and the center of the rotating hole 2 and the center of the guide groove 2 being on the same horizontal line, when the guide groove 1 and the guide groove 2 are relatively arranged, the fork operating lever can be switched freely in the guide groove 1 and the guide groove 2, and the fork operating lever can drive the guide groove 1 and the guide groove 2 to rotate relative to each other along the rotating shaft.

[0014] Furthermore, the first shift fork clamping member is provided with a first clamping hole, the lower rotating arm is provided with a second shift fork clamping member, the second shift fork clamping member is provided with a second clamping hole, the first shift fork clamping member is provided on one side of the first rotating hole, the second shift fork clamping member is provided on one side of the second rotating hole, and the first shift fork clamping member and the second shift fork clamping member are staggered.

[0015] A shift fork is respectively provided in the first clamping hole and the second clamping hole.

[0016] The beneficial effect of adopting the above-mentioned further technical solution is as follows: a holding hole 1 is provided on the shift fork holding part 1, and a holding hole 2 is provided on the shift fork holding part 2, and the shift fork is placed in the holding hole 1 and the holding hole 2 respectively, so that the shift fork operating lever drives the shift fork to rotate on both sides of the rotating shaft, and at the same time limits the rotation angle of the shift fork to avoid the shift fork from jumping gears or shifting gears randomly.

[0017] Furthermore, the length of the upper rotating arm is smaller than that of the lower rotating arm, and the maximum distance from the guide groove 1 to the rotating hole 1 is smaller than the maximum distance from the guide groove 2 to the rotating hole 2;

[0018] Preferably, the minimum distance from the guide groove 1 to the rotation hole 1 is smaller than the minimum distance from the guide groove 2 to the rotation hole 2;

[0019] More preferably, the guide groove one and the guide groove two are U-shaped slots.

[0020] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by making the length of the upper rotating arm shorter than the length of the lower rotating arm, the opening of the guide groove 2 is longer than the guide groove 1, and a certain space is left between the end face of the guide groove 2 and the end face of the guide groove 1, so that the fork operating lever can be tilted upward at a larger angle, thereby facilitating farmers to perform flexible operations and avoiding the unsafe risks caused by farmers leaning over to operate; by making the guide groove 1 and the guide groove 2 into U-shaped slots, the end of the fork operating lever can be flexibly moved in the U-shaped slot.

[0021] Furthermore, a rotation groove is provided at one end of the second guide groove away from the second rotation hole;

[0022] Preferably, the rotation slot is an L-shaped slot.

[0023] The beneficial effect of adopting the above-mentioned further technical solution is: by providing a rotating groove at the end of the guide groove 2 away from the rotating hole 2, the fork operating lever can be easily moved left and right in the guide groove 2, so that farmers can operate the fork operating lever more easily and flexibly, avoiding excessive force that causes the fork operating lever to fall off.

[0024] Furthermore, the upper rotating arm is provided with an anti-slipping member 1, and the anti-slipping member 1 is provided on both sides of the guide groove 1;

[0025] The lower rotating arm is provided with a second anti-slip member, which is placed on both sides of the second guide groove and is engaged with the limit baffle;

[0026] Preferably, the first anti-slip component and the second anti-slip component are both arranged on a side of the position-limiting support portion away from the rotating shaft.

[0027] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by arranging the anti-slipping member 1 on both sides of the guide groove 1, after the lower rotating arm rotates, the anti-slipping member 1 is located on the upper side of the opening of the guide groove 2, and can block the opening on the upper side of the guide groove 2, further preventing the end of the shift fork operating rod from escaping from the guide groove 2; by arranging the anti-slipping member 2 on both sides of the guide groove 2, after the upper rotating arm rotates, the opening of the guide groove 1 is blocked, further preventing the end of the shift fork operating rod from escaping from the guide groove 1;

[0028] Since the anti-slip part 1 and the anti-slip part 2 are both arranged on the side of the limiting support part away from the rotating shaft, the anti-slip part 1 and the anti-slip part 2 can be located on the upper side of the guide groove 1 and the guide groove 2 after rotation, and the space on the upper side of the guide groove 1 and the guide groove 2 can be blocked.

[0029] Furthermore, the distance between the limiting support parts on both sides of the guide groove 1 is 45mm-58mm, the width of the guide groove 1 and the guide groove 2 are both 15mm-20mm, and the width of the anti-slip part 1 and the anti-slip part 2 is 7mm-10mm.

[0030] The beneficial effects of adopting the above-mentioned further technical solution are: the distance between the limit support parts on both sides of the guide groove is 45mm-58mm, the width of guide groove one and guide groove two are both 15mm-20mm, and the width of anti-slip part one and anti-slip part two is 7mm-10mm, which enables the fork operating lever to drive the upper rotating arm and the lower rotating arm to rotate between the limit support parts without disengaging from guide groove one or guide groove two, and enables the fork operating lever to rotate flexibly in guide groove one and guide groove two.

[0031] Furthermore, a spherical head is provided at the end of the fork operating lever, and the spherical head is arranged in the guide groove 1 or the guide groove 2. The fork operating lever is provided with an angle adjustment ball, and the angle adjustment ball is rotatably arranged in the operating lever fixing plate.

[0032] The beneficial effects of adopting the above-mentioned further technical solution are: by setting a spherical head at the end of the fork joystick, it can adapt to the shape of guide groove one and guide groove two, and can better drive the upper rotating arm and the lower rotating arm to rotate. By setting an angle adjustment ball on the fork joystick, and the angle adjustment ball is rotatably set in the joystick fixed plate, the angle of the fork joystick can be adjusted at will, thereby facilitating the operation of farmers.

[0033] Furthermore, it also includes a mounting seat, the upper rotating arm and the lower rotating arm are arranged in the mounting seat, the mounting seat is connected to a rotating arm support, the rotating arm support is arranged on the lower side of the lower rotating arm, and the rotating arm support is rotatably connected to the rotating shaft.

[0034] The beneficial effects of adopting the above-mentioned further technical solution are as follows: by setting a mounting seat, the upper rotating arm and the lower rotating arm are set in the mounting seat, and the lower rotating arm and the upper rotating arm are fixed in the mounting seat through the rotating arm support, so that the upper rotating arm and the lower rotating arm can be rotatably set on the rotating arm support, and the shift fork operating lever can drive the shift lever on the upper rotating arm and the lower rotating arm to move in the mounting seat, so that farmers can easily shift gears of the speed change mechanism, support the upper rotating arm and the lower rotating arm, and prevent the shift fork operating lever from detaching from the upper rotating arm and the lower rotating arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the upper rotating arm and the lower rotating arm;

[0036] Figure 2 Schematic diagram of the structure of the upper rotating arm;

[0037] Figure 3 It is a structural diagram of the lower rotating arm;

[0038] Figure 4 Schematic diagram of the shift fork arm mechanism structure;

[0039] Figure 5 Schematic diagram of the shift fork lever structure;

[0040] Markings in the figure: 1. Upper rotating arm; 11. Rotating hole 1; 12. Guide groove 1; 13. Limit support; 14. Limit baffle; 15. Shift fork clamping piece 1; 16. Clamping hole 1; 17. Anti-slip piece 1; 2. Lower rotating arm; 21. Rotating hole 2; 22. Guide groove 2; 23. Rotating groove; 24. Shift fork clamping piece 2; 25. Clamping hole 2; 26. Anti-slip piece 2; 3. Rotating shaft; 4. Shift fork operating lever; 41. Spherical head; 42. Angle adjustment ball; 5. Rotating arm support; 6. Operating lever fixing plate; 7. Mounting seat. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0042] This embodiment provides Example 1: Please refer to Figure 1-5, in response to the above problems, the utility model designs a shift fork rotating arm, comprising an upper rotating arm 1 and a lower rotating arm 2, the upper rotating arm 1 and the lower rotating arm 2 are provided with a rotating shaft 3, the upper rotating arm 1 is provided with a guide groove 12, the lower rotating arm 2 is provided with a guide groove 2, the guide groove 12 and the guide groove 2 22 are arranged opposite to each other; the end of the shift fork operating rod 4 is provided in the guide groove 12 or the guide groove 2 22, and the two sides of the guide groove 12 are provided with a limited support part 13, the limited support part 13 is provided with a limited baffle 14, the limited baffle 14 extends in the direction of the guide groove 22, and the limited baffle 14 is provided on both sides of the guide groove 22; the upper rotating arm 1 is provided with a shift fork clamping part 15, and the lower rotating arm 2 is provided with a shift fork clamping part 24, and the shift fork clamping part 15 and the shift fork clamping part 2 24 are staggered. By providing a rotating shaft 3 on the upper rotating arm 1 and the lower rotating arm 2, the upper rotating arm 1 and the lower rotating arm 2 can be rotated relative to each other. By relatively arranging the guide groove 12 and the guide groove 2 22, the fork operating rod 4 can be switched in the guide groove 1 12 or the guide groove 2 22. When the end of the fork operating rod 4 is located in the guide groove 1 12, the upper rotating arm 1 can be driven to rotate. When the fork operating rod 4 is located in the guide groove 2 22, the lower rotating arm 2 can be driven to rotate. By providing a limit baffle 14 on the limit support part 13, the limit baffle 14 extends in the direction of the guide groove 2 22, and can be located in the guide groove 1 The two sides of the guide groove 22 can limit the rotation angle of the upper rotating arm 1 and the lower rotating arm 2, so as to prevent the fork operating lever 4 from shaking during operation or the farmer from operating too hard, causing the fork operating lever 4 to separate from the upper rotating arm 1 or the lower rotating arm 2. The upper rotating arm 1 or the lower rotating arm 2 is driven to rotate by the fork operating lever 4, and the fork clamping member 15 and the fork clamping member 2 24 are arranged alternately, thereby driving the fork clamping member 15 or the fork clamping member 2 24 to rotate relative to each other on both sides of the rotating shaft 3, which can limit the rotation angle of the shift fork and avoid the speed change mechanism from skipping gears or mismatching gears.

[0043] The position-limiting baffle 14 is tilted on the position-limiting support 13. The inclined surface of the position-limiting baffle 14 engages and engages with the side wall of the rotated lower rotating arm 2. The rotation angle of the upper rotating arm 1 or the lower rotating arm 2 is 15°-22°. By tilting the position-limiting baffle 14 on the position-limiting support 13, it can conform to the shape of the side wall of the rotated lower rotating arm 2, thereby limiting the rotation angle of the upper rotating arm 1 or the lower rotating arm 2. By limiting the rotation angle of the upper rotating arm 1 or the lower rotating arm 2 to 15°-22°, the end of the shift fork lever 4 can be prevented from disengaging from the first guide groove 12 or the second guide groove 22 when the rotation angle is too large, thereby preventing the speed change mechanism from skipping or mis-shifting.

[0044] The upper rotating arm 1 is provided with a rotating hole 11, and the lower rotating arm 2 is provided with a rotating hole 21. The rotating shaft 3 is provided in the rotating hole 11 and the rotating hole 21. Preferably, the center of the rotating hole 11 and the center of the guide groove 12 are located on the same horizontal line, and the center of the rotating hole 21 and the center of the guide groove 22 are located on the same horizontal line. By providing the rotating shaft 3 in the rotating hole 11 on the rotating arm and the rotating hole 21 on the lower rotating arm 2, the upper rotating arm 1 and the lower rotating arm 2 can rotate relative to each other around the rotating shaft 3. By aligning the center of the rotating hole 11 and the center of the guide groove 12, and the center of the rotating hole 21 and the center of the guide groove 22, when the guide groove 12 and the guide groove 2 are arranged relative to each other, the shift fork operating lever 4 can be freely switched between the guide groove 12 and the guide groove 2, 22, and the shift fork operating lever 4 can drive the guide groove 12 and the guide groove 2 to rotate relative to each other along the rotating shaft 3.

[0045] The shift fork clamping member 15 is provided with a clamping hole 16, and the lower rotating arm 2 is provided with a shift fork clamping member 24, and the shift fork clamping member 24 is provided with a clamping hole 25. The shift fork clamping member 15 is arranged on one side of the rotating hole 11, and the shift fork clamping member 24 is arranged on one side of the rotating hole 21. The shift fork clamping member 15 and the shift fork clamping member 2 are arranged alternately. Shift forks are respectively arranged in the clamping hole 16 and the clamping hole 25. By providing the clamping hole 16 on the shift fork clamping member 15 and the clamping hole 25 on the shift fork clamping member 24, and by placing the shift fork in the clamping hole 16 and the clamping hole 25, respectively, the shift fork operating lever 4 drives the shift fork to rotate on both sides of the rotating shaft 3, while limiting the rotation angle of the shift fork to prevent the shift fork from skipping or mis-shifting.

[0046] The length of the upper rotating arm 1 is smaller than that of the lower rotating arm 2, and the maximum distance from the guide groove 12 to the rotation hole 11 is smaller than the maximum distance from the guide groove 22 to the rotation hole 21; preferably, the minimum distance from the guide groove 12 to the rotation hole 11 is smaller than the minimum distance from the guide groove 22 to the rotation hole 21; more preferably, the guide groove 12 and the guide groove 22 are U-shaped slots. By making the length of the upper rotating arm 1 smaller than that of the lower rotating arm 2, the opening of the guide groove 22 is longer than that of the guide groove 12, and a certain space is left between the end face of the guide groove 22 and the end face of the guide groove 12, so that the shift fork lever 4 can be tilted upward at a greater angle, thereby facilitating flexible operation by farmers and avoiding the risk of farmers leaning over to operate. By making the guide groove 12 and the guide groove 22 into U-shaped slots, the end of the shift fork lever 4 can be flexibly moved in the U-shaped slot.

[0047] The second guide slot 22 is provided with a rotation slot 23 at one end thereof away from the second rotation hole 21. Preferably, the rotation slot 23 is an L-shaped slot. The provision of the rotation slot 23 at the end thereof away from the second rotation hole 21 facilitates the movement of the shift fork lever 4 within the second guide slot 22, allowing farmers to more easily and flexibly manipulate the shift fork lever 4 and preventing the shift fork lever 4 from falling off due to excessive force.

[0048] The upper rotating arm 1 is provided with an anti-slip component 17, and the anti-slip component 17 is arranged on both sides of the guide groove 12; the lower rotating arm 2 is provided with an anti-slip component 26, and the anti-slip component 26 is placed on both sides of the guide groove 22, and the anti-slip component 26 is engaged with the limiting baffle 14 for clamping; preferably, the anti-slip component 17 and the anti-slip component 2 are both arranged on the side of the limiting support part 13 away from the rotating shaft 3. By arranging anti-slipping parts 17 on both sides of the guide groove 12, after the lower rotating arm 2 rotates, the anti-slipping parts 17 can be located on the upper side of the opening of the guide groove 22, and the opening on the upper side of the guide groove 22 can be blocked, further preventing the end of the fork operating rod 4 from escaping from the guide groove 22; by arranging anti-slipping parts 26 on both sides of the guide groove 22, the opening of the guide groove 12 can be blocked after the upper rotating arm 1 rotates, further preventing the end of the fork operating rod 4 from escaping from the guide groove 12; by arranging anti-slipping parts 17 and anti-slipping parts 26 on the side of the limiting support part 13 away from the rotating shaft 3, the anti-slipping parts 17 and anti-slipping parts 26 can be located on the upper side of the guide groove 12 and the guide groove 22 after rotation, and the space on the upper side of the guide groove 12 and the guide groove 22 can be blocked.

[0049] The distance between the position-limiting supports 13 on both sides of the guide groove 12 is 45mm-58mm, the width of the guide groove 12 and the guide groove 2 are both 15mm-20mm, and the width of the anti-slip member 17 and the anti-slip member 2 are 7mm-10mm. By making the distance between the position-limiting supports 13 on both sides of the guide groove 14 45mm-58mm, the width of the guide groove 12 and the guide groove 2 are both 15mm-20mm, and the width of the anti-slip member 17 and the anti-slip member 2 are 7mm-10mm, the shift fork lever 4 can drive the upper rotating arm 1 and the lower rotating arm 2 to rotate between the position-limiting supports 13 without disengaging from the guide groove 12 or the guide groove 2, and can enable the shift fork lever 4 to rotate flexibly within the guide groove 12 and the guide groove 2.

[0050] The end of the fork lever 4 is provided with a spherical head 41, which is disposed in the guide groove 1 12 or the guide groove 2 22. The fork lever 4 is provided with an angle adjustment ball 42, which is rotatably disposed in the lever fixing plate 6. By providing the spherical head 41 at the end of the fork lever 4, it can adapt to the shape of the guide groove 1 12 and the guide groove 2 22, and can better drive the upper rotating arm 1 and the lower rotating arm 2 to rotate. By providing the angle adjustment ball 42 on the fork lever 4 and rotatably disposed in the lever fixing plate 6, the angle of the fork lever 4 can be freely adjusted, thereby facilitating operation by farmers.

[0051] The utility model further comprises a mounting seat 7, wherein the upper rotating arm 1 and the lower rotating arm 2 are arranged in the mounting seat 7, and the mounting seat 7 is connected to a rotating arm support member 5, wherein the rotating arm support member 5 is arranged on the lower side of the lower rotating arm 2, and the rotating arm support member 5 is rotatably connected to the rotating shaft 3. By setting the mounting seat 7, the upper rotating arm 1 and the lower rotating arm 2 are set in the mounting seat 7, and the lower rotating arm 2 and the upper rotating arm 1 are fixed in the mounting seat 7 by the rotating arm support member 5, so that the upper rotating arm 1 and the lower rotating arm 2 can be rotatably arranged on the rotating arm support member 5, and the shift fork operating lever 4 can drive the shift levers on the upper rotating arm 1 and the lower rotating arm 2 to move in the mounting seat 7, so that farmers can easily shift gears of the speed change mechanism, and the upper rotating arm 1 and the lower rotating arm 2 are supported, so that the shift fork operating lever 4 can be prevented from being separated from the upper rotating arm 1 and the lower rotating arm 2.

[0052] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, persons of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some of the technical features therein with equivalents; and such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A shift fork arm mechanism, characterized in that: The invention comprises an upper rotating arm (1) and a lower rotating arm (2), wherein a rotating shaft (3) is provided on the upper rotating arm (1) and the lower rotating arm (2), a first guide groove (12) is provided on the upper rotating arm (1), and a second guide groove (22) is provided on the lower rotating arm (2), wherein the first guide groove (12) and the second guide groove (22) are arranged opposite to each other; The end of the shift fork operating rod (4) is arranged in the guide groove 1 (12) or the guide groove 2 (22), and a limit support portion (13) is arranged on both sides of the guide groove 1 (12), and a limit baffle (14) is arranged on the limit support portion (13), and the limit baffle (14) is arranged on both sides of the guide groove 2 (22); The upper rotating arm (1) is provided with a first shift fork clamping member (15), and the lower rotating arm (2) is provided with a second shift fork clamping member (24), and the first shift fork clamping member (15) and the second shift fork clamping member (24) are arranged alternately.

2. The shift fork arm mechanism according to claim 1, characterized in that: The limit baffle (14) is tiltedly arranged on the limit support portion (13), and the inclined surface of the limit baffle (14) is engaged with the side wall of the rotated lower rotating arm (2) to be clamped, and the rotation angle of the upper rotating arm (1) or the lower rotating arm (2) is 15°-22°.

3. The shift fork arm mechanism according to claim 1, characterized in that: The upper rotating arm (1) is provided with a first rotating hole (11), the lower rotating arm (2) is provided with a second rotating hole (21), and the rotating shaft (3) is arranged in the first rotating hole (11) and the second rotating hole (21).

4. The shift fork arm mechanism according to claim 3, characterized in that: The center of the rotating hole 1 (11) and the center of the guide groove 1 (12) are located on the same horizontal line, and the center of the rotating hole 2 (21) and the center of the guide groove 2 (22) are located on the same horizontal line.

5. The shift fork arm mechanism according to claim 4, characterized in that: The shift fork clamping member 1 (15) is provided with a clamping hole 1 (16), and the shift fork clamping member 2 (24) is provided with a clamping hole 2 (25). The shift fork clamping member 1 (15) is provided on one side of the rotating hole 1 (11), and the shift fork clamping member 2 (24) is provided on one side of the rotating hole 2 (21).

6. The shift fork arm mechanism according to claim 1, characterized in that: The length of the upper rotating arm (1) is smaller than the length of the lower rotating arm (2), and the maximum distance from the guide groove 1 (12) to the rotating hole 1 (11) is smaller than the maximum distance from the guide groove 2 (22) to the rotating hole 2 (21).

7. The shift fork arm mechanism according to claim 6, characterized in that: The minimum distance between the guide groove 1 (12) and the rotation hole 1 (11) is smaller than the minimum distance between the guide groove 2 (22) and the rotation hole 2 (21).

8. The shift fork arm mechanism according to claim 7, characterized in that: The guide groove 1 (12) and the guide groove 2 (22) are U-shaped slots.

9. The shift fork arm mechanism according to claim 6, characterized in that: A rotation groove (23) is provided at one end of the second guide groove (22) away from the second rotation hole (21).

10. The shift fork arm mechanism according to claim 9, characterized in that: The rotating groove (23) is an L-shaped slot.

11. The shift fork arm mechanism according to claim 1, characterized in that: The upper rotating arm (1) is provided with an anti-slipping member (17), and the anti-slipping member (17) is provided on both sides of the guide groove (12); The lower rotating arm (2) is provided with a second anti-slip component (26), which is placed on both sides of the second guide groove (22), and the second anti-slip component (26) is engaged with the limiting baffle (14) for clamping.

12. The shift fork arm mechanism according to claim 11, characterized in that: The anti-slip component 1 (17) and the anti-slip component 2 (26) are both arranged on a side of the position-limiting support portion (13) away from the rotating shaft (3).

13. The shift fork arm mechanism according to claim 11, characterized in that: The distance between the limiting support parts (13) on both sides of the guide groove (12) is 45mm-58mm, the width of the guide groove (12) and the guide groove (22) are both 15mm-20mm, and the width of the anti-slip part (17) and the anti-slip part (26) are 7mm-10mm.

14. The shift fork arm mechanism according to claim 1, characterized in that: A spherical head (41) is provided at the end of the shift fork operating lever (4), and the spherical head (41) is arranged in the first guide groove (12) or the second guide groove (22). The shift fork operating lever (4) is provided with an angle adjustment ball (42), and the angle adjustment ball (42) is rotatably arranged in the operating lever fixing plate (6).

15. The shift fork arm mechanism according to claim 1, characterized in that: The utility model further comprises a mounting seat (7), wherein the upper rotating arm (1) and the lower rotating arm (2) are arranged in the mounting seat (7), and the mounting seat (7) is connected to a rotating arm support member (5), wherein the rotating arm support member (5) is arranged on the lower side of the lower rotating arm (2), and the rotating arm support member (5) is rotatably connected to the rotating shaft (3).

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