Gearbox double-linkage gear shifting control device

Abstract

The utility model discloses a gearbox double-linkage gear shifting control device, which relates to the technical field of gearboxes and comprises a control transmission cylinder, a middle transmission body is mounted in the middle of the control transmission cylinder in a swinging manner, and a middle transmission fixing seat positioned at the upper part of the middle transmission body is fixedly arranged in the control transmission cylinder. A middle transmission press-fitting seat is fixedly buckled at the lower part of the middle transmission body, and the middle transmission body is mounted on the middle transmission press-fitting seat and the middle transmission fixing seat in a swinging manner; a middle transmission upper rod is fixedly arranged on the upper portion of the middle transmission body, a middle transmission lower rod is fixedly arranged on the lower portion of the middle transmission body, an upper control rod is installed at the upper end of the control transmission cylinder in a swinging mode, the lower end of the upper control rod is used for shifting the middle transmission upper rod, and the lower end of the middle transmission lower rod is a control output end. The control device is small in control amplitude, simple in structure, low in cost and good in control accuracy.

Description

Technical Field

[0001] This utility model relates to the field of gearbox technology, and in particular to a dual-linkage shifting control device for gearboxes. Background Technology

[0002] The gearbox is a crucial power component on a tractor, located below the tractor cab. The gear shift lever is situated within the cab, and the driver operates it to change gears. In practice, the gear shift lever is designed as a relatively long lever to allow the driver to easily reach it for gear shifting. The lower end of the lever connects to the gear shift shaft and other structures within the gearbox. In this design, when the gear shift shaft can generate the required rotation angle (engaging gear) or sliding displacement (selecting gear), the upper end of the gear shift lever experiences a particularly large swing. However, the existing cab space often cannot accommodate this swing, leading to difficulty in shifting and affecting normal operation. To address this, the applicant filed a utility model patent with publication number "CN218564364U" entitled "Multi-linkage Gear Shifting Control Device," which uses a method of sequentially installing multiple control transmission levers to increase the height of the control end and minimize the length of the uppermost control transmission lever, thus achieving a smaller range of motion. However, this multi-bar linkage structure uses many parts, is complex to assemble, and has high costs. Furthermore, due to accumulated errors during use, its control precision is poor, resulting in a less than ideal user experience. Therefore, further improvements to the gear shifting control device are necessary. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a dual-linkage shifting control device for a gearbox with small operating range, simple structure, low cost, and good control precision.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a dual-linkage shifting control device for a gearbox, including a control transmission cylinder, an intermediate transmission body oscillatingly mounted in the middle of the control transmission cylinder, an intermediate transmission fixing seat fixedly mounted in the upper part of the intermediate transmission body inside the control transmission cylinder, an intermediate transmission press-fit seat fixedly fastened in the lower part of the intermediate transmission body, the intermediate transmission press-fit seat and the intermediate transmission fixing seat oscillatingly mounting the intermediate transmission body together; an upper intermediate transmission rod fixedly mounted in the upper part and a lower intermediate transmission rod fixedly mounted in the lower part of the intermediate transmission body, an upper control lever oscillatingly mounted in the upper end of the control transmission cylinder, the lower end of the upper control lever being used to actuate the upper intermediate transmission rod, and the lower end of the lower intermediate transmission rod being the control output end.

[0005] As a preferred technical solution, the control transmission cylinder includes a split upper transmission cylinder and a lower transmission cylinder. The bottom of the upper transmission cylinder is fixedly provided with the intermediate transmission fixing seat, and the upper end of the lower transmission cylinder is fixedly provided with the intermediate transmission pressing seat. The intermediate transmission pressing seat is bolted to the intermediate transmission fixing seat.

[0006] As a preferred technical solution, the control transmission cylinder is integrally set, and the intermediate transmission press-fit seat is snapped upward onto the intermediate transmission fixed seat.

[0007] As a preferred technical solution, the intermediate transmission body is a sphere, and the intermediate transmission fixing seat and the intermediate transmission pressing seat are respectively provided with transmission mounting ball sockets corresponding to the intermediate transmission body.

[0008] As a preferred technical solution, the upper control lever includes an upper control mounting body, an upper mounting fixing seat located at the lower part of the upper control mounting body is fixedly provided at the upper end of the control transmission cylinder, an upper mounting press-fit seat is fixedly fastened at the upper part of the upper control mounting body, and the upper mounting press-fit seat and the upper mounting fixing seat swing together to install the upper control mounting body; an active control lever body extending out of the control transmission cylinder is fixedly provided at the upper part of the upper control mounting body, and a control transmission lever body for actuating the intermediate transmission upper lever is fixedly provided at the lower part of the upper control mounting body.

[0009] As a preferred technical solution, the upper control mounting body is a sphere, and the upper mounting fixing seat and the upper mounting pressing seat are respectively provided with upper mounting ball sockets corresponding to the upper control mounting body.

[0010] As a preferred technical solution, the upper control mounting body is provided with a horizontal rotation limiting groove, and the control transmission cylinder is fixedly installed with a horizontal rotation limiting pin extending into the horizontal rotation limiting groove.

[0011] Due to the adoption of the above technical solution, the dual-linkage shifting control device for the gearbox includes a control transmission cylinder. An intermediate transmission body is oscillatingly mounted in the middle of the control transmission cylinder. An intermediate transmission fixing seat is fixedly mounted above the intermediate transmission body within the control transmission cylinder. An intermediate transmission press-fit seat is fixedly fastened to the lower part of the intermediate transmission body. The intermediate transmission press-fit seat and the intermediate transmission fixing seat together oscillate to mount the intermediate transmission body. An upper intermediate transmission rod is fixedly mounted above the intermediate transmission body, and a lower intermediate transmission rod is fixedly mounted below it. An upper control lever is oscillatingly mounted at the upper end of the control transmission cylinder. The lower end of the upper control lever is used to actuate the upper intermediate transmission rod, and the lower end of the lower intermediate transmission rod is the control output end. In this invention, the intermediate transmission body, the upper intermediate transmission rod, and the lower intermediate transmission rod constitute a single intermediate transmission rod. When the lengths of the upper and lower intermediate transmission rods are similar, effective operation can be achieved as long as the swing amplitude of the lower end of the upper control lever meets the swing amplitude requirement of the shift shaft in the gearbox. Therefore, the upper control lever is also a relatively short rod with a small swing amplitude. This invention uses only one intermediate transmission rod in conjunction with a control lever to form a double linkage. The intermediate transmission body is snapped onto the intermediate transmission fixed base via an intermediate transmission press-fit seat, enabling the swing installation of the intermediate transmission body. This significantly simplifies both the structure and assembly, resulting in lower overall costs. Furthermore, regardless of the length of the control transmission cylinder, gear shifting can be quickly achieved by simply changing the lengths of the upper and lower intermediate transmission rods, while other components remain unchanged. This improves the versatility of components in mass production, further reducing costs. Regardless of the length or size of the control transmission cylinder, the total number of components remains constant. Compared to the original multi-rod linkage structure, the number of components is significantly reduced, resulting in less accumulated error and better operational precision. Attached Figure Description

[0012] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0013] Figure 1 This is a cross-sectional structural schematic diagram of Embodiment 1 of this utility model;

[0014] Figure 2 yes Figure 1 Schematic diagram of the transmission state after manipulation;

[0015] Figure 3 yes Figure 1 A schematic diagram of the AA structure;

[0016] Figure 4 This is a three-dimensional cross-sectional view of the transmission cylinder according to Embodiment 1 of this utility model;

[0017] Figure 5This is a cross-sectional structural schematic diagram of Embodiment 2 of this utility model;

[0018] Figure 6 yes Figure 5 Schematic diagram of the transmission state after manipulation;

[0019] Figure 7 This is a three-dimensional cross-sectional view of the transmission cylinder according to Embodiment 2 of this utility model;

[0020] Figure 8 This is a cross-sectional structural diagram of Embodiment 3 of this utility model.

[0021] In the diagram: 1-Control transmission cylinder; 11-Upper transmission cylinder; 12-Lower transmission cylinder; 2-Intermediate transmission body; 21-Intermediate transmission fixed seat; 22-Intermediate transmission press-fit seat; 23-Upper intermediate transmission rod; 24-Lower intermediate transmission rod; 3-Upper control lever; 31-Upper control mounting body; 32-Upper mounting fixed seat; 33-Upper mounting press-fit seat; 34-Active control lever body; 35-Control transmission lever body; 41-Horizontal rotation limiting groove; 42-Horizontal rotation limiting pin; 51-Actuating transmission groove; 52-Actuating transmission body; 9-Shift shaft. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0023] Example 1: As Figures 1 to 4 As shown, the dual-linkage shifting control device for the gearbox includes a control transmission cylinder 1, which is fixedly mounted on the gearbox during use. In this embodiment, the control transmission cylinder 1 is not limited to cylinders with uniform walls or equal diameter walls; any structure with a centrally penetrating inner cavity is within the protection range of the control transmission cylinder 1.

[0024] An intermediate transmission body 2 is oscillatingly mounted in the middle of the control transmission cylinder 1. An intermediate transmission fixing seat 21 is fixedly provided in the upper part of the intermediate transmission body 2 inside the control transmission cylinder 1, and an intermediate transmission pressing seat 22 is fixedly fastened to the lower part of the intermediate transmission body 2. The intermediate transmission pressing seat 22 and the intermediate transmission fixing seat 21 together oscillate and mount the intermediate transmission body 2. Conventionally, the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22 have grooves corresponding to the intermediate transmission body 2. The two grooves together form a hole structure to accommodate the intermediate transmission body 2. The intermediate transmission body 2 can generate a degree of freedom of rotation in the circumferential direction in this hole structure, that is, to achieve oscillating mounting.

[0025] In this embodiment, the intermediate transmission body 2 is a sphere. Correspondingly, the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22 are respectively provided with transmission mounting ball sockets corresponding to the intermediate transmission body 2, thereby enabling the intermediate transmission body 2 to achieve omnidirectional swing. Of course, when only oscillation in one direction is required, the intermediate transmission body 2 can also be a transverse column, i.e., a pin shape. In this case, the grooves on the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22 are respectively long grooves with arc-shaped cross sections. This structure should also be within the protection scope of this utility model.

[0026] The upper part of the intermediate transmission body 2 is fixedly provided with an upper intermediate transmission rod 23 and the lower part is fixedly provided with a lower intermediate transmission rod 24. The upper intermediate transmission rod 23 and the lower intermediate transmission rod 24 respectively pass through the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22. Of course, the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22 are respectively provided with rod clearance openings.

[0027] An upper control lever 3 is oscillatingly mounted at the upper end of the control transmission cylinder 1. The lower end of the upper control lever 3 is used to actuate the intermediate transmission upper lever 23, and the lower end of the intermediate transmission lower lever 24 is the control output end. Conventionally, one of the upper end of the intermediate transmission upper lever 23 and the lower end of the upper control lever 3 is provided with a toggle transmission groove 51, and the other is provided with a toggle transmission body 52. ​​The toggle transmission body 52 is located within the toggle transmission groove 51. For example, the lower end of the upper control lever 3 is provided with the toggle transmission body 52, and the intermediate transmission upper lever 23 is provided with the toggle transmission groove 51. When the upper control lever 3 oscillates, the toggle transmission body 52 drives the toggle transmission groove 51 to move, causing the intermediate transmission upper lever 23 to oscillate.

[0028] In this embodiment, the upper control lever 3 includes an upper control mounting body 31. An upper mounting fixing seat 32 is fixedly provided at the upper end of the control transmission cylinder 1, located at the lower part of the upper control mounting body 31. An upper mounting press-fit seat 33 is fixedly fastened to the upper part of the upper control mounting body 31. The upper mounting press-fit seat 33 and the upper mounting fixing seat 32 together swing and mount the upper control mounting body 31. The swing mounting of the upper control mounting body 31 by the upper mounting press-fit seat 33 and the upper mounting fixing seat 32 is consistent with the swing mounting principle of the intermediate transmission fixing seat 21 and the intermediate transmission press-fit seat 22 on the intermediate transmission body 2, and will not be described again here.

[0029] The upper part of the upper control mounting body 31 is fixedly provided with an active control lever 34 extending out of the control transmission cylinder 1. The active control lever 34 is the part directly operated by the driver. The lower part of the upper control mounting body 31 is fixedly provided with a control transmission lever 35 for actuating the intermediate transmission upper lever 23. Of course, the upper mounting fixing seat 32 and the upper mounting pressing seat 33 are also provided with lever clearance openings corresponding to the control transmission lever 35 and the active control lever 34, respectively. In this embodiment, the upper control mounting body 31 is also a sphere, and the upper mounting fixing seat 32 and the upper mounting pressing seat 33 are respectively provided with upper mounting ball sockets corresponding to the upper control mounting body 31.

[0030] The upper control mounting body 31 is provided with a lateral rotation limiting groove 41, and the control transmission cylinder 1 is fixedly installed with a lateral rotation limiting pin 42 extending into the lateral rotation limiting groove 41. Through the cooperation of this pin and groove, the upper control lever is prevented from rotating laterally, thereby improving the driver's precision experience in the gear shifting process.

[0031] In this embodiment, the groove on the upper mounting base 32 has a spherical bottom and a cylindrical wall. The upper mounting press-fit base 33 is directly press-fitted within this groove. A retaining ring is installed on the cylindrical wall of the groove at the outer side of the upper mounting press-fit base 33, thereby achieving the fixed fastening of the upper mounting press-fit base 33. Of course, the upper mounting press-fit base 33 can also be directly fixed to the upper mounting base 32 or the operating transmission cylinder 1 by bolts, with the same effect. These modifications are all within the protection scope of this utility model.

[0032] Since the upper mounting base 32 is integrally set with the control transmission cylinder 1, the horizontal rotation limiting pin 42 can be installed before or after the upper control mounting body 31 is installed. Therefore, when only unidirectional swing is required, the horizontal rotation limiting groove 41 is a cylindrical groove, and after the horizontal rotation limiting pin 42 is inserted, the upper control lever 3 swings only in one direction. Similarly, the upper control mounting body 31 can also be directly set as a cylindrical shape to achieve unidirectional swing installation. This embodiment illustrates universal swing, and the horizontal rotation limiting groove 41 extends downward and upward respectively. Thus, in addition to the degree of freedom of swinging around the axis of the horizontal rotation limiting pin 42, the upper control mounting body 31 can also swing around an axis perpendicular to the horizontal rotation limiting pin 42, as well as a combination of both, forming the universal swing illustrated in this embodiment.

[0033] Preferably, the control transmission cylinder 1 includes a split upper transmission cylinder 11 and a lower transmission cylinder 12. The bottom of the upper transmission cylinder 11 is fixedly provided with the intermediate transmission fixing seat 21, and the upper end of the lower transmission cylinder 12 is fixedly provided with the intermediate transmission pressing seat 22. The intermediate transmission pressing seat 22 is bolted to the intermediate transmission fixing seat 21. Through this split configuration, the intermediate transmission fixing seat 21 and the intermediate transmission pressing seat 22 are integrally mounted on the upper transmission cylinder 11 and the lower transmission cylinder 12, respectively. Each part can be integrally cast and machined, simplifying the structure. During assembly, a screwdriver or hexagonal tool can be inserted from the lower end of the lower transmission cylinder 12 to install bolts, achieving a pressing and fixing effect. Following this guidance, the portion of the control transmission cylinder 1 located above the upper control mounting body 31 can also be split, with the upper mounting pressing seat 33 integrally fixed. This modification should also be within the protection scope of this utility model.

[0034] In this embodiment, the intermediate transmission body 2, the intermediate upper transmission rod 23, and the intermediate lower transmission rod 24 constitute a single intermediate transmission rod. When the lengths of the intermediate upper transmission rod 23 and the intermediate lower transmission rod 24 are similar, effective operation can be achieved as long as the swing amplitude of the lower end of the upper control lever 3 meets the swing amplitude requirement of the shift shaft 9 in the gearbox. Therefore, the upper control lever 3 is also a relatively short rod with a small swing amplitude. This embodiment uses only one intermediate transmission rod in conjunction with the upper control lever 3 to form a double linkage. The bolted connection between the lower transmission cylinder 12 and the upper transmission cylinder 11 enables the swing installation of the intermediate transmission body 2, significantly simplifying both the structure and assembly, and reducing overall cost. Furthermore, regardless of the length of the control transmission cylinder 1 used, gear shifting can be quickly achieved by mainly changing the lengths of the intermediate upper transmission rod 23 and the intermediate lower transmission rod 24, while other components remain unchanged. This improves the versatility of components in mass production and further helps reduce costs. Of course, in actual production, if necessary, the size of the upper control lever 3 can be appropriately changed, and the lengths of the intermediate transmission upper lever 23 and intermediate transmission lower lever 24 can be increased or decreased to adapt to the situation. This also reflects the characteristic of this embodiment that it is more convenient to design the lever length flexibly. No matter what size or model the control transmission cylinder 1 is, the total number of parts remains unchanged. Compared with the original multi-lever linkage structure, the number of parts is greatly reduced, so the error accumulation is small and the control accuracy is good.

[0035] Example 2: Figure 5 , Figure 6 and Figure 7 As shown, the difference between this embodiment and Embodiment 1 is that the operating transmission cylinder 1 is integrally formed, and the intermediate transmission press-fit seat 22 is snapped upward onto the intermediate transmission fixed seat 21. That is, the intermediate transmission press-fit seat 22 is fixedly installed using a similar installation method as the upper mounting press-fit seat 33. During installation, a tool is inserted through the lower end of the operating transmission cylinder 1 for installation. This structure is also simple and has low manufacturing cost.

[0036] Example 3: Figure 8 As shown, this embodiment is used for a common crank arm structure. Compared with the embodiment one, which is used to move the straight arm on the shift shaft 9 upward, this embodiment is used to move the crank arm on the shift shaft 9 diagonally downward. The application is also achieved by mainly changing the intermediate transmission upper rod 23 and intermediate transmission lower rod 24, and the same effect of simple structure and low manufacturing cost can be achieved.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, such as the overall control transmission cylinder 1 structure in Embodiment 2 for crank arm operation, etc. All such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-linkage shifting control device for a gearbox, comprising a control transmission cylinder, characterized in that: An intermediate transmission body is oscillatingly mounted in the middle of the control transmission cylinder. An intermediate transmission fixing seat is fixedly mounted on the upper part of the intermediate transmission body inside the control transmission cylinder. An intermediate transmission press-fit seat is fixedly fastened on the lower part of the intermediate transmission body. The intermediate transmission press-fit seat and the intermediate transmission fixing seat oscillate together to mount the intermediate transmission body. An upper intermediate transmission rod is fixedly mounted on the upper part of the intermediate transmission body and a lower intermediate transmission rod is fixedly mounted on the lower part. An upper control lever is oscillatingly mounted on the upper end of the control transmission cylinder. The lower end of the upper control lever is used to actuate the upper intermediate transmission rod, and the lower end of the lower intermediate transmission rod is the control output end.

2. The dual-linkage shifting control device for a gearbox as described in claim 1, characterized in that: The control transmission cylinder includes a split upper transmission cylinder and a lower transmission cylinder. The bottom of the upper transmission cylinder is fixedly provided with the intermediate transmission fixing seat, and the upper end of the lower transmission cylinder is fixedly provided with the intermediate transmission pressing seat. The intermediate transmission pressing seat is bolted to the intermediate transmission fixing seat.

3. The dual-linkage shifting control device for a gearbox as described in claim 1, characterized in that: The control transmission cylinder is integrally set, and the intermediate transmission press-fit seat is snapped upward onto the intermediate transmission fixed seat.

4. The dual-linkage shifting control device for a gearbox as described in claim 1, characterized in that: The intermediate transmission body is a sphere, and the intermediate transmission fixing seat and the intermediate transmission pressing seat are respectively provided with transmission mounting ball sockets corresponding to the intermediate transmission body.

5. The dual-clutch shifting control device for a gearbox as described in any one of claims 1 to 4, characterized in that: The upper control lever includes an upper control mounting body. An upper mounting fixing seat is fixedly provided at the upper end of the control transmission cylinder and located at the lower part of the upper control mounting body. An upper mounting press-fit seat is fixedly fastened at the upper part of the upper control mounting body. The upper mounting press-fit seat and the upper mounting fixing seat swing together to install the upper control mounting body. An active control lever body extending out of the control transmission cylinder is fixedly provided at the upper part of the upper control mounting body. A control transmission lever body for actuating the intermediate transmission upper lever is fixedly provided at the lower part of the upper control mounting body.

6. The dual-linkage shifting control device for a gearbox as described in claim 5, characterized in that: The upper control mounting body is a sphere, and the upper mounting fixing seat and the upper mounting pressing seat are respectively provided with upper mounting ball sockets corresponding to the upper control mounting body.

7. The dual-linkage shifting control device for a gearbox as described in claim 6, characterized in that: The upper control mounting body is provided with a horizontal rotation limiting groove, and the control transmission cylinder is fixedly installed with a horizontal rotation limiting pin extending into the horizontal rotation limiting groove.

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