Multifunctional limiting plate for small transmission cover
By designing a multi-function limit plate on the small cover of the transmission, combining the limit hole and spring seat, the gear selection limit and lubricant separation are achieved, and the problems of complex limit functions and lubricant splashing in the existing technology are solved. Improve assembly efficiency and part stability.
Patent Information
- Application Number
- CN202420252045.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-02
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-02-02
AI Technical Summary
The existing gear selection limit function of the gear selection and limiting function of the existing gearbox relies on a special positioning structure or a self-locking spring, resulting in complex design and low assembly efficiency, and easy splashing of lubricating oil.
A multi-functional limit plate is designed, including a top cover, a shift shaft and a limit plate. The gear selection limit is achieved through the low-speed spring seat, reverse spring and high-speed spring seat with a limit hole. The second limit is The cross-section of the position plate is L-shaped to separate the lubricant oil spray position.
Axial limiting of the top cover tip is achieved, avoiding component wear, improving assembly efficiency and interchangeability, and preventing lubricant splashing.
Smart Images
Figure CN222208880U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of vehicles, in particular to a multifunctional limiting plate for a transmission small cover. Background Art
[0002] The gear selection limit function of ordinary gearboxes is mostly achieved by designing the positioning surface of the top cover or the positioning of the gear selection self-locking device. It requires the top cover to be pre-cast with a special positioning structure in advance, or to add parts such as the gear selection self-locking spring and the self-locking spring seat to achieve the gear selection limit function. Utility Model Content
[0003] In order to solve the above problems, the utility model provides a multifunctional limit plate for a transmission small cover, and the technical solution adopted is as follows:
[0004] A multifunctional limit plate for a small transmission cover, comprising a top cover, a shift shaft, and a top cover shift head coaxially fixedly connected to the shift shaft and located inside the top cover, characterized in that a low-gear side spring seat and a high-gear side spring seat are coaxially arranged on the shift shaft and are respectively located on both sides of the top cover shift head, a first and a second gear spring are arranged between the low-gear side spring seat and the top cover shift head, a reverse gear spring is arranged between the low-gear side spring seat and the inner wall of the top cover, and a fifth and sixth gear spring is arranged between the high-gear side spring seat and the inner wall of the top cover. The lower end of the top cover is fixedly connected with a first limit plate, and the first limit plate is provided with a shift self-locking spring pressing surface and a limit hole for cooperating with the top cover shift head to limit the position, the spacing between one side of the limit hole and the top cover shift head is one shift stroke, and the spacing between the other side and the top cover shift head is two shift strokes.
[0005] Furthermore, a second limiting plate is fixedly connected to the lower part of the first limiting plate near the vent plug.
[0006] Furthermore, the cross section of the second limiting plate is L-shaped.
[0007] Furthermore, the first limiting plate is composed of a first step surface and a second step surface, the limiting hole is distributed vertically through the first step surface, the second step surface is higher than the first step surface, and is used for press-fitting the shift self-locking spring.
[0008] The beneficial effects of the utility model are:
[0009] 1. The first limit plate can realize axial limit of the top cover shift head when selecting gears, so as to avoid the failure of the gear selection spring and the reverse gear spring due to excessive compression and the wear of parts caused by excessive impact on the gear selection system. In addition, a gear shift self-locking spring press-fitting surface higher than the first limit plate body is provided on the first limit plate to realize the function of press-fitting the gear shift self-locking spring.
[0010] 2. A second limit plate is provided under the top cover to separate the vent plug from the gearbox lubricating oil splashing position through the second limit plate to prevent the lubricating oil from spraying out through the vent plug;
[0011] 3. The first limit plate and the second limit plate are fixed in the top cover assembly by bolts. On the premise of meeting the functional requirements of the assembly, the interchangeability of parts is improved, the assembly efficiency of the gearbox assembly is improved, and after-sales maintenance is facilitated. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a bottom view of the utility model structure
[0013] Figure 2 This is the AA section view after flipping 180°
[0014] Figure 3 BB section view
[0015] Among them, 1-first limit plate, 101-first step surface, 102-second step surface, 103-limiting hole, 2-second limit plate, 3-top cover, 4-shift fork shaft, 5-shift self-locking steel ball, 6-shift self-locking spring, 7-vent plug, 8-lubricating oil splashing position, 9-top cover shift head, 10-fixing bolt, 11-low gear side spring seat, 12-first and second gear springs, 13-reverse gear spring, 14-high gear side spring, 15-fifth and sixth gear springs, 16-shift shaft, M-fifth and sixth gear position, N-first and second gear position, O-reverse gear position. DETAILED DESCRIPTION
[0016] 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.
[0017] 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.
[0018] like Figures 1 to 3The multifunctional limit plate for the small cover of the transmission shown comprises a top cover 3, a top cover shift head 9, a shift shaft 16, a first limit plate 1 and a second limit plate 2, the shift shaft 16 is rotatably connected to the top cover 3, the shift head 9 is coaxially slidably connected to the shift shaft 16, a low-gear side spring seat 11 and a high-gear side spring seat 14 are respectively sleeved on the right and left sides of the shift head 9, the low-gear side spring seat 11 and the high-gear side spring seat 14 are both slidably connected to the shift shaft 16, and a first and second gear spring 12 sleeved on the outside of the shift shaft 16 is arranged between the right end face of the shift head 9 and the low-gear side spring seat 11, a reverse gear spring 13 sleeved on the outside of the shift shaft 16 is arranged between the low-gear side spring seat 11 and the right side wall of the top cover 3, and a fifth and sixth gear spring 15 sleeved on the outside of the shift shaft 16 is arranged between the high-gear side spring seat 14 and the left side wall of the top cover 3.
[0019] The first limiting plate 1 is fixedly connected to the lower end of the top cover 3 by bolts. The first limiting plate 1 is provided with a first stepped surface 101 and a second stepped surface 102. The first stepped surface 101 is provided with a limiting hole 103. The limiting hole 103 is a rectangular through hole extending vertically and is used to cooperate with the top cover dial head 9. The left and right widths of the limiting hole 103 are 43 mm. Figure 3 In the state shown, the top cover shift head 9 is in the gear selection neutral position, which is the third and fourth gears, the left side is the high gear area fifth and sixth gears, and the right side is the resistance area first and second gears and reverse gear. In this embodiment, the gear selection stroke design value is 10.6mm, the lower diameter of the top cover shift head 9 is 11mm, and the distance between the left end face of the top cover shift head 9 and the left end of the limiting hole 103 is 10.7mm, that is, one gear shift stroke plus a clearance design of 0.1mm, and the distance between the right end face of the lower part of the top cover shift head 9 and the right end face of the limiting hole 103 is 21.3mm, that is, two gear shift strokes plus a clearance design of 0.1mm; Figure 2 In the viewing direction, the second step surface 102 is located at the right end of the first step surface 101, and the lower end surface of the second step surface 102 is higher than the lower end surface of the first step surface 101, and the distance between the two in the height direction is P. The gear shift self-locking spring 6 is located below the second step surface 102. When selecting a gear, the gear shift self-locking spring 6 and the gear shift self-locking steel ball 5 are pressed into the groove of the shift fork shaft 4 through the second step surface.
[0020] When using this device to select gears, Figure 3The state shown is the initial state. When the top cover dial head 9 moves to the left high gear area to select a gear, the top cover dial head 9 drives the high gear side spring seat 14 to slide to the left and compress the fifth and sixth gear spring 15. After moving a gear selection stroke of 10.6mm, the top cover dial head 9 reaches the fifth and sixth gear position, the gear is selected in place, and the left side is limited by the limit hole 103; when the top cover dial head 9 selects a gear to the first and second gear position N in the blocking area, the top cover dial head 9 slides to the right and compresses the first and second gear springs 12. After compressing the first and second gear springs 12 for a gear selection stroke of 10.6mm, the top cover dial head 9 reaches It reaches the first and second gear position N and is limited by the elastic deformation of the first and second gear spring 12 itself; the top cover shift head 9 continues to move 10.6mm to the right, compresses the reverse gear spring 13 through the high gear side spring seat 14, and reaches the reverse gear position O after moving 10.6mm to the right, and is limited by the right end of the limiting hole 103; during the gear selection process, the design of the limiting hole 103 can avoid early failure of the fifth and sixth gear springs 15, the first and second gear springs 12 and the reverse gear spring 13 due to excessive compression and wear of components caused by excessive impact on the gear selection system.
[0021] The second limiting plate 2 has an L-shaped cross-section and consists of a horizontal plate and a vertical plate. The horizontal plate is fixed below the first limiting plate 1 by four sets of fixing bolts 10, and the second limiting plate 2 is located at one end of the first limiting plate 1 close to the vent plug 7. The vertical plate is used to separate the lubricating oil splashing position and the vent plug 7. The second limiting plate 2 can block the splashing of the lubricating oil in the gearbox to prevent the lubricating oil from spraying out through the vent plug 7.
[0022] 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 multifunctional limit plate for a transmission small cover, comprising a top cover, a shift shaft, and a top cover shift head coaxially fixedly connected to the shift shaft and located inside the top cover, It is characterized in that The shift shaft is coaxially provided with a low-gear side spring seat and a high-gear side spring seat respectively located on both sides of the top cover shift head; a first and a second gear spring is provided between the low-gear side spring seat and the top cover shift head, a reverse gear spring is provided between the low-gear side spring seat and the inner wall of the top cover, a fifth and a sixth gear spring is provided between the high-gear side spring seat and the inner wall of the top cover; a first limit plate is fixedly connected to the lower end of the top cover, a press-fit surface of the shift self-locking spring and a limit hole for cooperating with the top cover shift head to limit the position are provided on the first limit plate, the distance between one side of the limit hole and the top cover shift head is one shift stroke, and the distance between the other side and the top cover shift head is two shift strokes.
2. The multifunctional limit plate for the transmission small cover according to claim 1, It is characterized in that A second limiting plate is fixedly connected to the lower part of the first limiting plate near the vent plug.
3. The multifunctional limit plate for the transmission small cover according to claim 2, It is characterized in that The cross section of the second limiting plate is L-shaped.
4. The multifunctional limit plate for the transmission small cover according to claim 1, It is characterized in that The first limiting plate is composed of a first step surface and a second step surface. The limiting hole is distributed vertically through the first step surface. The second step surface is higher than the first step surface and is used for press-fitting the gear shift self-locking spring.