Gear selecting and shifting control mechanism of transmission

Abstract

In order to solve the problem that the height of a transmission small cover assembly cannot be matched with that of a van truck, the utility model provides a transmission gear selecting and shifting control mechanism which comprises a small cover assembly, a gear shifting shaft, a supporting plate, a flexible shaft support, a gear selecting rocker arm assembly and a gear shifting rocker arm. A supporting pin is fixedly connected to the supporting plate, the gear selecting rocker arm assembly is rotationally connected to the upper portion of the supporting pin, a gear selecting sleeve is arranged on the gear shifting shaft, one end of the gear selecting rocker arm assembly is fixedly connected with the gear selecting flexible shaft, and the other end of the gear selecting rocker arm assembly is hinged to the gear selecting sleeve through a knuckle bearing. One end of the gear shifting rocker arm is fixedly connected with the gear shifting shaft, the other end of the gear shifting rocker arm is hinged to the gear shifting flexible shaft, the gear selecting flexible shaft and the gear shifting flexible shaft are both connected with the flexible shaft support in a front-back sliding mode, and on the premise that the gear selecting and shifting performance of a transmission is not affected, the height of the small cover control mechanism can be reduced, and the requirement for the matching height of a van truck is met. And the gear selecting and shifting efficiency and reliability of the transmission are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a transmission gear selection and shifting operating mechanism. Background Art

[0002] At present, the transmission cover operating mechanism used in most models on the market is at the top of the cover, which is relatively high from the center of the transmission. It will interfere with the vehicle frame crossbeam during assembly, and cannot be matched on some box trucks or special vehicles with matching height requirements, affecting the transmission market sales and customer satisfaction. Utility Model Content

[0003] In order to solve the problem that the height of the transmission small cover assembly cannot match that of a box truck, the utility model provides a transmission shifting control mechanism, and the technical solution adopted is as follows:

[0004] A transmission shifting mechanism, characterized in that it comprises a small cover assembly, a shift shaft, a support plate, a flexible shaft bracket, a gear selection rocker arm assembly, and a shift rocker arm, wherein the support plate and the flexible shaft bracket are fixedly connected to the front side of the upper part of the transmission front housing,

[0005] A support pin is fixedly connected to the support plate, and the gear selector rocker arm assembly is rotatably connected above the support pin. A gear selector sleeve is arranged on the gear shift shaft, and one end of the gear selector rocker arm assembly is fixedly connected to the gear selector flexible shaft, and the other end is hingedly connected to the gear selector sleeve through a joint bearing; one end of the gear shift rocker arm is fixedly connected to the gear shift shaft, and the other end is hingedly connected to the gear shift flexible shaft, and the gear selector flexible shaft and the gear shift flexible shaft are all connected in a forward and backward sliding manner to the flexible shaft bracket.

[0006] Furthermore, the gear selector and shift operating mechanism is characterized in that the gear selector rocker arm assembly is composed of a gear selector rocker arm, a rolling bearing and a dust cover, and further, the gear selector rocker arm is rotatably connected to the support pin through a rolling bearing, and the dust cover is fixedly connected to the top of the gear selector rocker arm.

[0007] Furthermore, the gear selection sleeve is rotationally connected to the gear shift shaft, and an axial fixing pin is provided between the gear selection sleeve and the gear shift shaft.

[0008] Furthermore, a limit spring is arranged between the inner wall of the gear selection sleeve and the end surface of the joint bearing.

[0009] Furthermore, a sealing ring is provided between the gear selection sleeve and the gear shift shaft.

[0010] Furthermore, the flexible shaft bracket is provided with a first mounting portion distributed horizontally and a second mounting portion distributed vertically, and the gear selection flexible shaft and the gear shift flexible shaft are respectively connected to the first mounting portion and the second mounting portion in a forward and backward sliding manner.

[0011] Furthermore, the axial limiting mechanism includes an axial fixing pin, and an annular groove correspondingly distributed in position and connected with the axial fixing pin is provided between the gear selection sleeve and the gear shift shaft.

[0012] The beneficial effects of the utility model are:

[0013] 1. This device sets the transmission operating mechanism above the front housing of the transmission. Compared with the conventional scheme where the operating mechanism is set above the small cover assembly, the installation height of the operating mechanism can be reduced to meet the matching height requirements of box-type trains;

[0014] 2. An annular groove is processed on the connection between the shift shaft and the selector sleeve. The fixing pin passes through the selector sleeve and the shift shaft, so that the selector sleeve can be connected to the shift shaft, so that the rotation of the shift shaft does not drive the selector sleeve to rotate. The selector sleeve can also drive the shift shaft to move left and right, realizing the gear selection and shifting function. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the utility model

[0016] Figure 2 This is a top view of the structure of the utility model

[0017] Figure 3 for Figure 2 Middle AA section view

[0018] Figure 4 for Figure 3 Middle BB section view

[0019] Among them, 1-support plate, 2-circlip, 3-gear selector rocker arm assembly, 301-gear selector rocker arm, 302-rolling bearing, 303-dust cover, 4-support pin, 5-limiting retaining spring, 6-joint bearing, 7-gear selector sleeve, 8-axial fixing pin, 9-gear shift shaft, 10-sealing ring, 11-gear shift rocker arm, 12-flexible shaft bracket, 13-gear selector flexible shaft, 14-gear shift flexible shaft, 15-small cover assembly, 16-transmission front housing. DETAILED DESCRIPTION

[0020] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0021] In the description of the utility model, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the viewing direction or position relationship, and are only for the convenience of describing the utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0022] like Figures 1 to 4 The transmission shift control mechanism shown includes a small cover assembly 15, a transmission front housing 16, a shift shaft 9, a shift rocker arm assembly 3, a shift rocker arm 11, a shift flexible shaft 13, a shift flexible shaft 14, a support plate 1, a support pin 4, and a flexible shaft bracket 12. The shift rocker arm assembly 3 is rotatably connected to the top of the transmission front housing 16 through the support pin 4, the shift flexible shaft 13 and the shift flexible shaft 14 are respectively hingedly connected to the top and left side of the transmission front housing 16 through the flexible shaft bracket 12, and a shift sleeve 7 is connected between the shift rocker arm assembly 3 and the shift shaft 9.

[0023] Specifically, Figures 1 to 3 As shown, the support plate 1 is fixedly connected to the top of the transmission front housing 16 and is distributed horizontally. A support pin 4 is fixedly connected to the top of the support plate 1. The flexible shaft bracket 12 is a plate-like structure with an L-shaped cross-section. Its transverse plate is welded and fixed to the upper end face of the transmission front housing 16, and the longitudinal plate is welded and fixed to the left end face of the transmission front housing 16. The transverse plate is distributed parallel to the horizontal plane, and the longitudinal plate is distributed in a vertical plane. The gear selection flexible shaft 13 and the gear shifting flexible shaft 14 are respectively connected to the transverse plate and the longitudinal plate of the flexible shaft bracket 12. The gear selection flexible shaft 13 can move forward and backward along the transverse plate, and the gear shifting flexible shaft 14 can move forward and backward along the plane where the longitudinal plate is located.

[0024] Gear selector rocker arm assembly 3 Figure 3 and Figure 4 As shown, it consists of a gear selector rocker arm 301, a rolling bearing 302 and a dust cover 303. The inner ring of the rolling bearing 302 is sleeved on the outside of the support pin 4 and the two are fixedly connected. The gear selector rocker arm 301 is coaxially fixedly connected to the outer ring of the rolling bearing 302. The gear selector rocker arm 301 is rotatably connected to the top of the support pin 4 through the rolling bearing 302, and a retaining spring 2 is also provided at the upper end of the support pin 4 for axially limiting the rolling bearing 302 to prevent the rolling bearing 302 from moving upward and separating from the support pin 4. The dust cover 303 is fixedly connected to the top of the gear selector rocker arm 301 to prevent water and dust from entering the bearing and causing damage to the bearing.

[0025] The upper part of the gear selection sleeve 7 is provided with mounting holes extending frontward and rearward for fixing the spherical bearing 6, and the lower part is provided with mounting holes extending leftward and rightward for coaxially rotating with the shift shaft 9. The outer ring of the spherical bearing 6 is coaxially fixed with the upper mounting hole of the gear selection sleeve 7, and the inner ring is fixedly connected with one end of the gear selection rocker arm 301, and the other end of the gear selection rocker arm 301 is fixedly connected with the rear end of the gear selection flexible shaft 13. When the gear selection flexible shaft 13 is rotated, the gear selection rocker arm 301 can be driven to rotate around the support pin 4, and the shift shaft 9 can be driven to move axially through the gear selection sleeve 7. An axial limiting mechanism is provided between the gear selection sleeve 7 and the shift shaft 9, and the axial limiting mechanism includes an axial fixing pin 8 at the lower part of the gear selection sleeve 7. An annular groove corresponding to the position is provided between the lower end surface of the shift shaft 9, and the two annular grooves form a cylindrical through hole, and the length direction of the annular groove is distributed in a direction perpendicular to the shift shaft 9. The axial fixing pin 8 can cooperate with the two annular grooves to position the shift sleeve 7 and the shift shaft 9 in the left and right directions. Moreover, the axial fixing pin 8 can realize the axial positioning while also realizing the rotation of the shift sleeve 7 around the shift shaft 9, so as to avoid the shift shaft 9 driving the shift sleeve 7 to rotate during gear shifting, thereby avoiding driving the shift selector rocker arm 301 to move. In addition, two sets of sealing rings 10 are provided between the shift sleeve 7 and the shift shaft 9, which are respectively located on the axial sides of the annular groove on the shift shaft 9 to prevent water, dust and impurities from entering.

[0026] In addition, a limiting shoulder is provided at the rear end of the inner wall of the upper mounting hole of the gear selection sleeve 7, and a limiting retaining spring 5 is provided at the front end, and the spherical bearing 6 is limited in the front-rear direction by the limiting shoulder and the limiting retaining spring 5.

[0027] One end of the shift rocker arm 11 is coaxially fixedly connected to the shift shaft 9, and the other end is hingedly connected to the shift flexible shaft 14. By turning the shift flexible shaft 14 to rotate along the longitudinal plate of the flexible shaft bracket 12, the shift shaft 9 can be driven to rotate to achieve the shift operation.

[0028] When selecting gears, the gear selection soft shaft 13 moves forward or backward to drive the gear selection rocker arm assembly 3 to rotate, and the gear selection rocker arm assembly 3 drives the gear selection sleeve 7 to move left and right through the joint bearing 6. Since the gear selection sleeve 7 is connected to the shift shaft 9 through the fixing pin 8, it can drive the shift shaft 9 to move left and right to achieve gear selection; when shifting gears, the gear shift soft shaft 14 moves forward or backward to drive the shift rocker arm 11 to rotate, and the shift rocker arm 11 rotates in the front and rear directions to drive the shift shaft 9 to rotate. At this time, due to the design of the annular groove on the shift shaft 9, the gear selection sleeve 7 will not rotate, thereby achieving gear shifting.

[0029] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A transmission shifting mechanism, characterized in that: It includes a small cover assembly, a shift shaft, a support plate, a flexible shaft bracket, a gear selection rocker arm assembly, and a shift rocker arm. The support plate and the flexible shaft bracket are fixedly connected to the front side above the front shell of the transmission. A support pin is fixedly connected to the support plate. The gear selection rocker arm assembly is rotatably connected above the support pin. A gear selection sleeve is rotatably connected to the shift shaft, and an axial limiting mechanism is provided between the gear selection sleeve and the shift shaft. One end of the gear selection rocker arm assembly is fixedly connected to the gear selection flexible shaft, and the other end is hingedly connected to the gear selection sleeve through a joint bearing; one end of the shift rocker arm is fixedly connected to the shift shaft, and the other end is hingedly connected to the shift flexible shaft, and the gear selection flexible shaft and the shift flexible shaft are all connected in a forward and backward sliding manner with the flexible shaft bracket.

2. The transmission shifting mechanism according to claim 1, characterized in that: The gear selection rocker arm assembly consists of a gear selection rocker arm, a rolling bearing and a dust cover. The gear selection rocker arm is rotatably connected to a support pin through a rolling bearing, and the dust cover is fixedly connected to the top of the gear selection rocker arm.

3. The transmission shifting mechanism according to claim 1, characterized in that: The gear selection sleeve is rotatably connected to the gear shift shaft, and an axial fixing pin is arranged between the gear selection sleeve and the gear shift shaft.

4. The transmission shifting mechanism according to claim 1, characterized in that: A limit spring is arranged between the inner wall of the gear selection sleeve and the end surface of the spherical bearing.

5. The transmission shifting mechanism according to claim 1, characterized in that: A sealing ring is arranged between the gear selection sleeve and the gear shift shaft.

6. The transmission shifting mechanism according to claim 1, characterized in that: The flexible shaft bracket is provided with a first mounting portion distributed horizontally and a second mounting portion distributed vertically, and the gear selection flexible shaft and the gear shift flexible shaft are respectively connected to the first mounting portion and the second mounting portion in a forward and backward sliding manner.

7. The transmission shifting mechanism according to claim 1, characterized in that: The axial limiting mechanism includes an axial fixing pin, and an annular groove correspondingly distributed in position and connected with the axial fixing pin is provided between the gear selection sleeve and the gear shift shaft.

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