CN210461654U - Tractor operating mechanism that shifts - Google Patents

Abstract

The application relates to a tractor operating mechanism that shifts belongs to tractor technical field. The application provides a tractor gear shifting control mechanism, which comprises a gear shifting rod, a rotating shaft and a transmission connecting rod set, wherein the gear shifting rod is used for being arranged on a steering column and is in rotating fit with the steering column, and the gear shifting rod is connected with the rotating shaft through a universal shaft; one end of the transmission connecting rod group is fixedly connected with the rotating shaft, the tail end of the transmission connecting rod group is fixedly connected with the gear shifting rocker arm, and the transmission connecting rod group is used for converting the rotation of the rotating shaft relative to the first axis into the rotation of the gear shifting rocker arm relative to the second axis. Different from the arrangement form of current tractor operating mechanism that shifts, the tractor operating mechanism that shifts of this application embodiment on the one hand arranges in the below position of steering wheel, and pastes the steering column and arranges, not only is convenient for shift operation, can also dodge bigger space to arrange other accessories.

Description

Tractor operating mechanism that shifts

Technical Field

The application relates to the technical field of tractors, in particular to a tractor gear shifting control mechanism.

Background

The tractor gear shifting control mechanism is a main control device on a tractor, and the control mechanism is simple and reliable in structure, ergonomic and attractive in arrangement, so that a driver can operate more comfortably. Most of the traditional tractor gear shifting control mechanisms are arranged at the middle position right ahead of a driver or the right side position of the driver, but the gear shifting control mechanisms of the tractor are provided with main speed change, auxiliary speed change, shuttle gear shifting, crawling gears and the like, and the control mechanisms are arranged at the same position, so that the operation is inconvenient, and the attractiveness is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the application provides a tractor operating mechanism that shifts, sets up operating handle such as auxiliary transmission or shuttle formula are shifted or are crawled the shelves and put in the below position of steering wheel, and is not only pleasing to the eye, has left more spaces for the driving position again, and the operation is more convenient.

The embodiment of the application provides a tractor gear shifting control mechanism which comprises a gear shifting lever, a rotating shaft and a transmission connecting rod group, wherein the gear shifting lever is used for being installed on a steering column and is in running fit with the steering column, and the gear shifting lever is connected with the rotating shaft through a universal shaft; one end of the transmission connecting rod group is fixedly connected with the rotating shaft, the tail end of the transmission connecting rod group is fixedly connected with the gear shifting rocker arm, and the transmission connecting rod group is used for converting the rotation of the rotating shaft relative to the first axis into the rotation of the gear shifting rocker arm relative to the second axis.

Different from the arrangement form of current tractor operating mechanism that shifts, the tractor operating mechanism that shifts of this application one side embodiment arranges in the below position of steering wheel, and pastes the steering column and arranges, can dodge bigger space to arrange other accessories. The cardan shaft can not only convert the rotation of gear level into the rotation of axis of rotation, still does benefit to this tractor operating mechanism's of shifting installation.

In addition, the tractor gear shifting control mechanism according to the embodiment of one aspect of the application also has the following additional technical characteristics:

according to some embodiments of the present application, the tractor shift operating mechanism further includes a first mounting block fixedly connected to the steering column, the shift lever being rotatably mounted to the first mounting block. The first mounting seat can fix the rotation axis of the gear shifting rod, so that the rotation stability of the gear shifting rod is improved.

According to some embodiments of the application, the gear shift lever comprises a lever body and a handle, the lever body is rotatably arranged on the first mounting seat, one end of the lever body is detachably connected with the handle, and the other end of the lever body is connected with the universal shaft. The gear shifting rod is designed into a mode that the rod body is detachably connected with the handle, the handle can be conveniently replaced, and the connection and installation of the rod body and the universal shaft are facilitated.

According to some embodiments of the present application, the lever is L-shaped and includes a mounting portion sleeved on the shift lever and locked by a locking bolt and a manipulating portion. The L-shaped handle has low manufacturing cost and is convenient for a driver to operate.

According to some embodiments of the present application, the first mounting block includes a first collar for fitting over the steering column and a second collar coupled to the first collar for fitting over the shift lever to mount the shift lever to the steering column. As a form of the first mounting seat, the arrangement form occupies less space, is convenient to mount and can improve the rotation stability of the gear shifting lever.

According to some embodiments of the present application, the tractor shift operating mechanism further includes a second mounting seat for fixed connection to the steering gear bracket, the rotating shaft being rotatably mounted to the second mounting seat. The second mount can define the position of the rotation axis of the rotation shaft, thereby improving the rotational stability of the rotation shaft.

According to some embodiments of the application, the transmission linkage comprises a first rocker arm, a connecting rod and a second rocker arm, one end of the first rocker arm is fixedly connected to the rotating shaft, one end of the second rocker arm is used for fixedly connecting the gear shifting rocker arm, and two ends of the connecting rod are respectively hinged to the first rocker arm and the second rocker arm. The transmission linkage can convert rotation of the rotating shaft around the first axis into rotation of the gear shifting rocker arm around the second axis.

According to some embodiments of the application, the connecting rod comprises a first clevis and a second clevis, the first clevis being hinged to the first rocker arm, the second clevis being hinged to the second rocker arm, the first clevis and the second clevis being threadedly connected. The first connecting fork and the second connecting fork are in threaded connection, so that the length of the connecting rod can be adjusted on the basis of ensuring the transmission of the connecting rod, the installation error is eliminated, and the gear shifting control mechanism of the tractor is convenient to install.

According to some embodiments of the application, the connecting rod further comprises a locking nut, the second clevis is screwed into the first clevis, the surface of the second clevis is provided with threads, the second clevis is provided with an abutting surface, and the locking nut is mounted on the second clevis and abuts against the abutting surface to lock the relative positions of the first clevis and the second clevis. The relative position of the first connecting fork and the second connecting fork is fixed by using the locking nut, so that the transmission stability of the connecting rod can be ensured.

According to some embodiments of the present application, the universal shaft includes a first connection pipe connected to the shift lever, a second connection pipe connected to the rotation shaft, and a rotor, the first connection pipe and the rotor being rotatably connected to the second connection pipe and the rotor through elastic round pins, respectively. The universal shaft can enable the gear shifting lever and the rotating shaft to be mutually bent, various installation positions can be flexibly used, and the transmission effect can be kept.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is a schematic structural view of a tractor shift operating mechanism in accordance with an embodiment of an aspect of the present application;

FIG. 2 is a drive relationship diagram of a tractor shift operating mechanism in accordance with an embodiment of an aspect of the present application;

FIG. 3 is a schematic illustration of a shift lever in a tractor shift operating mechanism in accordance with an embodiment of an aspect of the present application;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

FIG. 5 is a schematic structural diagram of a connection between a lever body and a handle of a gear shifting control mechanism of a tractor according to an embodiment of the present application;

FIG. 6 is a schematic structural view of a cardan shaft in a gear shift operating mechanism of a tractor according to an embodiment of an aspect of the present application;

fig. 7 is a schematic structural view of the rotor 143 in fig. 6;

FIG. 8 is a schematic illustration of a drive linkage in an embodiment of a tractor shift operating mechanism according to an aspect of the present application;

fig. 9 is a transmission diagram of a tractor shift control mechanism and a fork pulling mechanism according to an embodiment of an aspect of the present application.

Icon: 100-tractor shift operating mechanism; 110-a gear shift lever; 111-a rod body; 1111-a first mounting portion; 1112-a first threaded hole; 112-a handle; 1121 — a second mounting part; 1122-second threaded hole; 1123-a manipulation section; 1124-first section; 1125-a second section; 113-a first locking bolt; 120-a rotating shaft; 130-drive linkage; 131-a first rocker arm; 1311-a first end; 1312-a second end; 132-a connecting rod; 1321-a first clevis; 1322-a second clevis; 1323-fifth end; 1324-sixth end; 1325-seventh terminal; 1326-eighth end; 1327-lock nut; 1328-abutment surface; 133-a second rocker arm; 1331-a third terminal; 1332-a fourth end; 140-cardan shaft; 141-a first connection pipe; 1411-a first mounting hole; 142-a second connecting tube; 1421 — second mounting hole; 143-a rotor; 1431 — first pin; 1432 — a second pin; 150-a first mount; 151-first loop; 152-a second loop; 160-a second mount; 200-a gear shift rocker arm; 300-a steering column; 400-a diverter bracket; 500-a fork pulling mechanism; 510-a shifting block; 511-driving lever; 520-a translation bar; 530-shifting fork.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

Referring to fig. 1, a tractor shift operating mechanism 100 according to an embodiment of the present application includes a shift lever 110, a rotating shaft 120 and a transmission linkage 130, the shift lever 110 is configured to be mounted on a steering column 300 and rotatably engaged with the steering column 300, and the shift lever 110 and the rotating shaft 120 are connected by a universal shaft 140. Referring to fig. 2, transmission linkage 130 has one end fixedly connected to rotation shaft 120 and the other end fixedly connected to shifting rocker arm 200, and transmission linkage 130 is used for converting the rotation of rotation shaft 120 relative to the first axis into the rotation of shifting rocker arm 200 relative to the second axis.

The shift lever 110 is used for driver operation, when the driver rotates the shift lever 110, the shift lever 110 drives the rotation shaft 120 to rotate around the first axis through the universal shaft 140, the rotation shaft 120 drives the shift rocker 200 to rotate around the second axis through the transmission linkage 130, and the shift rocker 200 drives the shift fork 530 (please refer to fig. 9) of the shift fork mechanism 500 in the shift box to move along the shift fork shaft, so as to realize gear shifting.

Different from the arrangement form of the existing tractor gear shifting control mechanism, the tractor gear shifting control mechanism 100 of the embodiment of the application is arranged at the lower position of a steering wheel and is arranged close to a steering column 300, so that a larger space can be avoided for arranging other accessories.

The following description describes the structure and interconnection of the various components of the tractor shift operating mechanism 100 according to one embodiment of the present application.

The shift lever 110 has one end for driver's operation and the other end connected to the rotational shaft 120 through a universal shaft 140.

Referring to fig. 3, the shift lever 110 includes a lever body 111 and a grip 112, the lever body 111 is a straight lever, the lever body 111 is rotatably disposed near the steering column 300, an upper end of the lever body 111 is detachably connected to the grip 112, and a lower end thereof is connected to the universal shaft 140. One end of the handle 112 is connected to the upper end of the lever 111, and the other end is used for the driver to operate.

Preferably, the rod body 111 is arranged in parallel with the steering column 300 and close to each other to maximally reduce an installation space.

In some embodiments of the present application, the tractor shift operating mechanism 100 further includes a first mounting base 150, the first mounting base 150 is fixedly connected to the steering column 300, and the lever body 111 of the shift lever 110 is rotatably mounted to the first mounting base 150.

Referring to fig. 4, as an example, the first mounting seat 150 includes a first collar 151 and a second collar 152, wherein the first collar 151 is an openable clamp capable of being fitted over the steering column 300 and locked closed into a ring shape by a locking member, so as to be fixedly mounted on the steering column 300. The second ring 152 is disposed on the lever 111 of the gear shift lever 110 to mount the lever 111 to the steering column 300.

Preferably, the shaft 111 is rotatably mounted in the second collar 152 by a bushing.

In other embodiments, the first mounting seat 150 may be arranged in other manners to define the position of the rod body 111 relative to the steering column 300 on the basis of ensuring that the rod body 111 can rotate independently of the steering column 300.

The lower end of the handle 112 is sleeved on the rod body 111 and locked by a locking bolt.

Referring to fig. 4 and 5, in some embodiments of the present application, a first mounting portion 1111 is disposed at an upper end of the rod 111, a second mounting portion 1121 is disposed at a lower end of the handle 112, and the first mounting portion 1111 is sleeved with the second mounting portion 1121. The first mounting portion 1111 is provided with a first threaded hole 1112 radially penetrating through the rod body 111, the second mounting portion 1121 is provided with a second threaded hole 1122 radially penetrating through the handle 112, and after the first mounting portion 1111 is sleeved by the second mounting portion 1121, the first threaded hole 1112 and the second threaded hole 1122 are penetrated and locked by using a first locking bolt 113, so that the handle 112 is fixedly mounted on the rod body 111. As will be readily appreciated, this arrangement can facilitate replacement of the handle 112. In other embodiments, the shift lever 110 may be provided as a unitary structure.

Further, referring to fig. 3, the handle 112 is L-shaped, the second mounting portion 1121 of the handle 112 is disposed on the longer first section 1124, and the end of the second section 1125 is disposed with the manipulation portion 1123. The control part 1123 is wrapped with an anti-slip layer so as to be convenient for a driver to operate and prevent hand sweat from slipping.

The rotation shaft 120 is located at a lower end of the shift lever 110 and is connected to the shift lever 110 through a universal shaft 140.

The rotating shaft 120 is a straight shaft, the upper end of the rotating shaft 120 is fixedly connected with the universal shaft 140, and the lower end is fixedly connected with the transmission linkage 130.

Referring to fig. 1, in some embodiments of the present application, the tractor shift operating mechanism 100 further includes a second mounting base 160, the second mounting base 160 is fixedly connected to the steering gear bracket 400, and the rotating shaft 120 is rotatably mounted to the second mounting base 160. It is easily understood that in the construction of the conventional vehicle type, the steering column 300 is provided at the lower end thereof with the steering bracket 400 in conformity with the outer shape of the steering apparatus, and the rotating shaft 120 is still disposed as close as possible to the steering apparatus, i.e., to the steering bracket 400. In other embodiments, the rotating shaft 120 may be rotatably mounted on other components belonging to the entire vehicle frame to increase the rotational stability of the rotating shaft 120 and to ensure that the rotating shaft 120 is rotated by the gear shift lever 110, and at the same time, the position thereof is fixed relative to the steering gear bracket 400.

Referring to fig. 6 and 7, the universal shaft 140 includes a first connection pipe 141, a second connection pipe 142, and a rotor 143. The universal shaft 140 can convert the rotation of the handle 112 into the rotation of the rotation shaft 120, which is different from the form directly fixedly connecting the rod body 111 and the rotation shaft 120. As will be readily appreciated, this enables the length of the mast body 111 to be increased and disposed against the steering column 300.

Referring to fig. 7, in some embodiments of the present application, the rotor 143 includes two first pins 1431 and two second pins 1432, the two first pins 1431 are disposed on both sides of the rotor 143 along the third axis, and the two second pins 1432 are disposed on both sides of the rotor 143 along the fourth axis. The third axis and the fourth axis are perpendicular to each other.

Referring to fig. 6, one end of the first connecting tube 141 is connected to the lower end of the lever body 111 of the shift lever 110, the other end of the first connecting tube 141 is provided with two first mounting holes 1411 radially penetrating through the first connecting tube 141, and the two first mounting holes 1411 are rotatably connected to two first pins 1431. One end of the second connection pipe 142 is connected to the upper end of the rotation shaft 120, and the other end of the second connection pipe 142 is provided with two second installation holes 1421 radially penetrating through the second connection pipe 142, and the two second installation holes 1421 are rotatably connected to two second pins 1432.

With this arrangement, the universal shaft 140 connects the rod body 111 and the rotary shaft 120 such that the rod body 111 can rotate about the third axis with respect to the rotor 143, and the rotary shaft 120 can rotate about the fourth axis with respect to the rotor 143. It will be readily appreciated that when the shaft 111 is rotatably mounted to the steering column 300 and the pivot shaft 120 is rotatably mounted to the steering gear bracket 400, the pivot shaft 120 is generally vertically disposed, and since the shaft 111 and the pivot shaft 120 are capable of rotating about the third axis, the shaft 111 can be adapted to different tilt angles and still be mounted to the first mounting base 150 such that the shaft 111 is disposed parallel to the steering column 300. The universal shaft 140 not only converts rotation of the handle 112 into rotation of the rotational shaft 120, but also facilitates installation of the tractor shift operating mechanism 100.

Alternatively, both the two first pins 1431 and the two second pins 1432 are elastic round pins, so that the first pins 1431 can fill the first mounting holes 1411 and the second pins 1432 can fill the second mounting holes 1421. In the steering process, the structural form can improve the connection stability of the universal shaft 140, so that the universal shaft 140 is not easy to shake, and the transmission stability is improved.

The lower end of the rotating shaft 120 is connected to the transmission linkage 130.

Referring to fig. 2, in some embodiments of the present application, the transmission linkage 130 is disposed on a first plane, wherein an axis of the rotating shaft 120 is parallel to a normal direction of the first plane.

Referring to fig. 8, the transmission linkage 130 includes a first swing arm 131, a connecting rod 132, and a second swing arm 133, the first swing arm 131 includes a first end 1311 and a second end 1312, and the second swing arm 133 includes a third end 1331 and a fourth end 1332. The first end 1311 is connected to the rotating shaft 120, and the second end 1312 is hinged to the connecting bar 132. One end of the connecting rod 132 is hinged to the second end 1312, the other end is hinged to the third end 1331 of the second rocker arm 133, and the fourth end 1332 is fixedly connected to the shifting rocker arm 200.

Wherein the shifting rocker arm 200 belongs to a component of the gear shifting box, the axis of rotation of the shifting rocker arm 200 is defined as the second axis, and the axis of the rotating shaft 120 is defined as the first axis. The first axis is parallel to the second axis, and drive linkage 130 is capable of converting rotation of rotational shaft 120 relative to the first axis into rotation of shift rocker arm 200 relative to the second axis.

Further, the connecting rod 132 includes a first clevis 1321 and a second clevis 1322, the first clevis 1321 includes a fifth end 1323 and a sixth end 1324, and the second clevis 1322 includes a seventh end 1325 and an eighth end 1326. The fifth end 1323 is hingedly connected to the second end 1312 of the first rocker arm 131, the eighth end 1326 is hingedly connected to the third end 1331 of the second rocker arm 133, and the sixth end 1324 and the seventh end 1325 are threadedly coupled.

In some embodiments of the present application, sixth end 1324 is threaded onto an exterior of seventh end 1325. This arrangement enables the length of the connecting rod 132 to be adjusted, eliminating installation errors of the shift box and the tractor shift operating mechanism 100.

Preferably, the connecting rod 132 further includes a retaining nut 1327, and the seventh end 1325 of the second clevis 1322 is threaded into the sixth end 1324 of the first clevis 1321. The seventh end 1325 is externally threaded and the sixth end 1324 is provided with an abutment surface 1328. A lock nut 1327 is attached to the seventh end 1325, and when the lock nut 1327 abuts on the abutment surface 1328, the relative position of the first yoke 1321 and the second yoke 1322 can be locked.

It will be readily appreciated that during actual installation, the shift box and the tractor shift operating mechanism 100 are mounted separately and connected at the shift rocker arm 200. As can be easily understood, the tractor shift control mechanism 100 is used as a mass-produced component, the first connecting fork 1321 and the second connecting fork 1322 are connected by screw threads, and the locking nut 1327 is then engaged with the abutting surface 1328 to make the length of the connecting rod 132 adjustable and locked and fixed, so that the installation error can be eliminated, and the tractor shift control mechanism 100 can be conveniently installed on the whole vehicle.

As an implementation form, the step of mounting the tractor gear shifting control mechanism 100 on the whole vehicle is as follows:

the rotating shaft 120 is rotatably mounted to the steering gear bracket 400 by the second mounting socket 160;

the rod body 111 is rotatably mounted to the steering column 300 through the first mounting seat 150;

fixedly mounting the eighth end 1326 of the second rocker arm 133 with the shifting rocker arm 200;

a fork-pulling mechanism 500 for adjusting the length of the screw-fit between the first and second yokes 1321 and 1322 to make the length of the connecting rod 132 appropriate for mounting the shift rocker arm 200 in the shift box;

connecting the gear shifting rocker arm 200 with the fork pulling mechanism 500;

the lock nut 1327 is tightened to the abutment surface 1328, the lock nut 1327 abuts against the abutment surface 1328, and the relative position between the first yoke 1321 and the second yoke 1322 is locked, thereby completing the attachment.

Referring to fig. 9, in some embodiments of the present application, the yoke mechanism 500 includes a yoke 510, a translation rod 520, and a yoke 530. One end and the eighth end 1326 of the gear shifting rocker arm 200 are fixedly connected, the other end is connected with the shifting block 510, when the eighth end 1326 drives the gear shifting rocker arm 200 to rotate along the third axis, the gear shifting rocker arm 200 drives the shifting block 510 to rotate along the third axis, the other end of the shifting block 510 is provided with a shifting lever 511, the shifting lever 511 is matched with the translation rod 520, the translation rod 520 moves along the shifting fork shaft, and the translation rod 520 drives the shifting fork 530 to move along the shifting fork shaft, so that gear shifting is achieved.

The operating principle of the tractor shift operating mechanism 100 is as follows:

the driver holds the handle 1123 and rotates the handle 112, the handle 112 drives the body of rod 111 to rotate, the body of rod 111 drives the rotation axis 120 through the cardan shaft 140 and rotates for the first axis, the lower extreme of rotation axis 120 drives the first rocker arm 131 and rotates for the first axis, the second end 1312 of the first rocker arm 131 drives the connecting rod 132 to move, the connecting rod 132 drives the third end 1331 of the second rocker arm 133 to move, the second rocker arm 133 drives the gear shifting rocker arm 200 and rotates for the second axis, the gear shifting rocker arm 200 drives the fork shifting mechanism 500 to realize gear shifting.

The tractor shift control mechanism 100 of an aspect of the present application is configured to connect the shift lever 110 to the rotation shaft 120 through the universal shaft 140, and the shift lever 110 is disposed along the length direction of the steering column 300, disposed at a position below the steering wheel, and disposed against the steering column 300, so as to facilitate the operation and avoid a larger space for disposing other accessories.

It should be noted that the features of the embodiments in the present application may be combined with each other without conflict.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The tractor gear shifting control mechanism is characterized by comprising a gear shifting lever, a rotating shaft and a transmission connecting rod set, wherein the gear shifting lever is used for being mounted on a steering column and is in rotating fit with the steering column, and the gear shifting lever is connected with the rotating shaft through a universal shaft;

one end of the transmission connecting rod group is fixedly connected with the rotating shaft, the tail end of the transmission connecting rod group is fixedly connected with the gear shifting rocker arm, and the transmission connecting rod group is used for converting the rotation of the rotating shaft relative to the first axis into the rotation of the gear shifting rocker arm relative to the second axis.

2. The tractor shift operating mechanism of claim 1, further comprising a first mounting block fixedly connected to the steering column, the shift lever rotatably mounted to the first mounting block.

3. The tractor shift operating mechanism according to claim 2, wherein the shift lever includes a lever body and a handle, the lever body being rotatably mounted to the first mounting base, the lever body being detachably connected at one end to the handle and connected at the other end to the cardan shaft.

4. The tractor shift operating mechanism according to claim 3, wherein the handle is L-shaped and includes a mounting portion and an operating portion, the mounting portion is sleeved on the shift lever and locked by a locking bolt.

5. The tractor shift operating mechanism according to claim 3, wherein the first mounting block includes a first collar for engaging the steering column and a second collar coupled to the first collar for engaging the shift lever to mount the shift lever to the steering column.

6. The tractor shift operating mechanism of claim 1, further comprising a second mounting block for fixed connection to a steering gear bracket, the rotating shaft rotatably mounted to the second mounting block.

7. The tractor shift operating mechanism according to claim 1, wherein the transmission linkage includes a first rocker arm, a connecting rod and a second rocker arm, one end of the first rocker arm is fixedly connected to the rotating shaft, one end of the second rocker arm is used for fixedly connecting the shift rocker arm, and two ends of the connecting rod are respectively hinged to the first rocker arm and the second rocker arm.

8. The tractor shift operating mechanism of claim 7, wherein the connecting rod includes a first clevis and a second clevis, the first clevis being hingedly connected to the first rocker arm, the second clevis being hingedly connected to the second rocker arm, the first clevis and the second clevis being threadedly connected.

9. The tractor shift operating mechanism of claim 8, wherein the connecting rod further includes a lock nut, the second clevis being threaded into the first clevis, the second clevis surface being threaded, the second clevis being provided with an abutment surface, the lock nut being mounted to the second clevis and abutting the abutment surface to lock the relative positions of the first and second clevises.

10. The tractor shift operating mechanism according to claim 1, wherein the universal shaft includes a first connecting pipe connected to the shift lever, a second connecting pipe connected to the rotation shaft, and a rotor, the first connecting pipe and the rotor, and the second connecting pipe and the rotor are rotatably connected by elastic round pins, respectively.

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