A transmission oil supply mechanism
Patent Information
- Application Number
- CN202522726611.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-23
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-23
AI Technical Summary
[0002]多挡变速器中通过摩擦片组的开合实现挡位的变换，有机械驱动和液压驱动两种，但在重型车辆的变速器中，液压驱动优于机械驱动，申请人的一项在先申请号为2025220240745的专利技术记载了一种双AT并联多电机多挡变速器，其通过腔内部的液压腔通入液压油来驱动摩擦片组的开口，现有的供油机构均不适配，因此需要重新设计一种液压供油机构
1.通过供油外壳上的供油通孔和旋转接头轴上的供油通道实现液压油的传输，并形成模块化的配油单元；2.采用耐磨套+耐磨环的间隙密封副，取消传统旋转密封圈，延长使用寿命，消除密封圈磨损带来的密封失效；
Smart Images
Figure CN224903960U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of transmission technology, and more specifically relates to a transmission oil supply mechanism. Background Technology
[0002] In multi-speed transmissions, gear shifting is achieved by the opening and closing of friction plate groups. There are two types: mechanical drive and hydraulic drive. However, in the transmissions of heavy-duty vehicles, hydraulic drive is superior to mechanical drive. The applicant's prior patent application number 2025220240745 describes a dual-AT parallel multi-motor multi-speed transmission, which drives the opening of the friction plate group by introducing hydraulic oil into the internal hydraulic chamber. Existing oil supply mechanisms are not suitable, so a new hydraulic oil supply mechanism needs to be designed. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a transmission oil supply mechanism that transmits hydraulic oil through an oil supply through-hole on the oil supply housing and an oil supply channel on the rotary joint shaft.
[0004] To achieve the above objectives, this utility model provides the following technical solution: a transmission oil supply mechanism, wherein an intermediate shaft is provided inside the transmission, and a plurality of clutch friction plates and a plurality of clutch oil chambers are provided on the intermediate shaft. A rotary joint shaft is provided at one end of the intermediate shaft, and the rotary joint shaft is connected to the intermediate shaft and is driven to rotate synchronously by the intermediate shaft. An oil supply housing is provided on the transmission housing, and the rotary joint shaft is rotatably connected to the oil supply housing. A plurality of oil supply through holes are provided on the oil supply housing, and an oil supply channel corresponding to the oil supply through holes is provided on the rotary joint shaft. An intermediate channel corresponding to the oil supply channel is provided on the intermediate shaft. The intermediate channels at different positions connect to different clutch oil chambers and cool the clutch friction plates through the intermediate channels.
[0005] Furthermore, a wear-resistant sleeve is provided between the oil supply housing and the rotary joint shaft, and the wear-resistant sleeve is provided with an oil passage hole corresponding to the oil supply through hole, and the wear-resistant sleeve is fixedly connected to the oil supply housing.
[0006] Furthermore, wear-resistant rings are provided on both sides of the inlet of the oil supply channel on the rotary joint shaft, and the wear-resistant rings slide in a sealed manner with the wear-resistant sleeve.
[0007] Furthermore, the wear-resistant sleeve is provided with cooling oil channels, which are connected to the inner cavity of the oil supply shell.
[0008] Furthermore, a bearing is provided between the oil supply housing and the rotary joint shaft, and the bearing is located inside the oil supply housing.
[0009] Furthermore, the end of the intermediate shaft is provided with a connecting hole, the rotary joint shaft extends into the connecting hole and is connected to the connecting hole by a spline, and the entrance of the intermediate channel is located inside the connecting hole.
[0010] Furthermore, the rotary joint shaft is provided with an outer ring groove corresponding to the oil supply channel inlet and outlet.
[0011] Compared with the prior art, the beneficial effects of this utility model are: 1. Hydraulic oil is transmitted through the oil supply through-hole on the oil supply housing and the oil supply channel on the rotary joint shaft, forming a modular oil distribution unit; 2. A gap sealing pair of wear-resistant sleeve + wear-resistant ring is adopted, eliminating the traditional rotary seal ring, extending service life, and eliminating sealing failure caused by seal ring wear; 3. Independent control of multi-gear hydraulic circuits enables rapid gear adjustment and switching; 4. Increase the cooling oil supply to the clutch friction plate assembly and ensure continuous supply to extend the service life of the friction plate assembly; 5. The oil supply mechanism has a short axial dimension and occupies little space; at the same time, reducing the radial dimension and the size of the wear ring can significantly reduce the leakage at the opening of the wear ring. Attached Figure Description
[0012] Figure 1 This is a side sectional three-dimensional structural diagram of the transmission oil supply mechanism of this utility model; Figure 2 This is a side sectional planar structural diagram of the transmission oil supply mechanism of this utility model.
[0013] Reference numerals: 1. Intermediate shaft; 2. Clutch oil chamber; 3. Rotary joint shaft; 4. Oil supply housing; 5. Oil supply through hole; 6. Oil supply channel; 7. Intermediate channel; 8. Friction plate; 9. Wear-resistant sleeve; 10. Oil through hole; 11. Wear-resistant ring; 12. Cooling oil passage; 13. Bearing; 14. Connecting hole; 15. Outer ring groove. Detailed Implementation
[0014] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.
[0015] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.
[0016] Reference Figure 1 and Figure 2 The present invention will be further described below.
[0017] A transmission oil supply mechanism includes an intermediate shaft 1 inside the transmission. The intermediate shaft 1 has several clutch friction plates 8 and several clutch oil chambers 2. A rotary joint shaft 3 is located at one end of the intermediate shaft 1 and is connected to the intermediate shaft 1, rotating synchronously. An oil supply housing 4 is located on the transmission housing. The rotary joint shaft 3 is rotatably connected to the oil supply housing 4. The oil supply housing 4 has several oil supply through holes 5. The rotary joint shaft 3 has oil supply channels 6 corresponding to the oil supply through holes 5. The intermediate shaft 1 has intermediate channels 7 corresponding to the oil supply channels 6. The intermediate channels 7 at different locations connect to different clutch oil chambers 2 and cool the clutch friction plates 8 through the intermediate channels 7.
[0018] like Figure 2 As shown in the preferred embodiment, the oil supply channel 6 includes a first-gear oil supply channel, a second-gear oil supply channel, and a cooling oil supply channel. The first-gear and second-gear oil supply channels are used to drive the friction plate clutch to open and close, respectively, while the cooling oil supply channel cools the friction plates 8 of the clutch through a smaller intermediate channel 7. Specifically, the oil supply for the first and second gears is controlled by the vehicle's oil supply system, while the cooling of the friction plates 8 is achieved through continuous oil supply.
[0019] like Figure 1 and Figure 2 As shown, in gear 1, the oil supply system supplies high-pressure hydraulic oil to the corresponding oil supply through hole 5 on the oil supply housing 4, and injects it into the corresponding clutch oil chamber 2 through the corresponding oil supply channel 6 on the rotary joint shaft 3 and the intermediate channel 7 on the intermediate shaft 1, driving the corresponding friction plate group to engage. The same applies to gear 2. The oil supply channel 6 used for cooling continuously supplies oil to cool the friction plate groups of all clutches.
[0020] like Figure 1 and Figure 2 As shown in the preferred embodiment, a wear-resistant sleeve 9 is provided between the oil supply housing 4 and the rotary joint shaft 3. The wear-resistant sleeve 9 is provided with an oil passage hole 10 corresponding to the oil supply through hole 5. The wear-resistant sleeve 9 is fixedly connected to the oil supply housing 4.
[0021] like Figure 1As shown in this embodiment, preferably, wear-resistant rings 11 are provided on both sides of the inlet of the oil supply channel 6 on the rotary joint shaft 3, and the wear-resistant rings 11 and the wear-resistant sleeve 9 are sealed and slide together.
[0022] like Figure 1 As shown in the preferred embodiment, the wear-resistant sleeve 9 is provided with a cooling oil passage 12, which is connected to the inner cavity of the oil supply shell 4. When the cooling oil supply channel continuously supplies oil, a small portion of the oil enters the cooling oil passage 12 and fills the inner cavity of the oil supply shell 4, thereby cooling the wear-resistant sleeve 9.
[0023] like Figure 1 As shown in the preferred embodiment, a bearing 13 is provided between the oil supply housing 4 and the rotary joint shaft 3, and the bearing 13 is located inside the inner cavity of the oil supply housing 4. Therefore, the cooling oil in the inner cavity of the oil supply housing 4 can also cool the bearing 13.
[0024] like Figure 1 As shown in the preferred embodiment, the end of the intermediate shaft 1 is provided with a connecting hole 14, the rotary joint shaft 3 extends into the connecting hole 14 and is connected to the connecting hole 14 by a spline, and the entrance of the intermediate channel 7 is located inside the connecting hole 14.
[0025] like Figure 1 As shown, in this preferred embodiment, the rotary joint shaft 3 is provided with an outer annular groove 15 corresponding to the inlet and outlet of the oil supply channel 6. Specifically, the oil supply housing 4 is provided with an inner annular groove corresponding to the oil supply through hole 5. Specifically, the outer annular groove 15 and the inner annular groove enable the rotary joint shaft 3 to receive hydraulic oil into the oil supply channel 6 when it rotates.
[0026] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.
Claims
1. A transmission oil supply mechanism, wherein an intermediate shaft is provided inside the transmission, and a plurality of clutch friction plates and a plurality of clutch oil chambers are provided on the intermediate shaft, characterized in that: One end of the intermediate shaft is provided with a rotary joint shaft, which is connected to the intermediate shaft and rotates synchronously driven by the intermediate shaft. The transmission housing is provided with an oil supply housing, and the rotary joint shaft is rotatably connected to the oil supply housing. The oil supply housing is provided with several oil supply through holes, and the rotary joint shaft is provided with oil supply channels corresponding to the oil supply through holes. The intermediate shaft is provided with a central channel corresponding to the oil supply channels. The central channels at different positions connect to different clutch oil chambers and cool the clutch friction plates through the central channels.
2. The transmission oil supply mechanism according to claim 1, characterized in that: A wear-resistant sleeve is provided between the oil supply housing and the rotary joint shaft. The wear-resistant sleeve is provided with an oil passage hole corresponding to the oil supply through hole. The wear-resistant sleeve is fixedly connected to the oil supply housing.
3. The transmission oil supply mechanism according to claim 2, characterized in that: Wear-resistant rings are provided on both sides of the inlet of the oil supply channel on the rotary joint shaft, and the wear-resistant rings slide in a sealed manner with the wear-resistant sleeve.
4. The transmission oil supply mechanism according to claim 2, characterized in that: The wear-resistant sleeve is provided with cooling oil channels, which are connected to the inner cavity of the oil supply shell.
5. The transmission oil supply mechanism according to claim 4, characterized in that: A bearing is provided between the oil supply housing and the rotary joint shaft, and the bearing is located inside the cavity of the oil supply housing.
6. The transmission oil supply mechanism according to claim 1, characterized in that: The intermediate shaft has a connecting hole at its end. The rotary joint shaft extends into the connecting hole and is connected to the connecting hole by a spline. The entrance of the intermediate channel is located inside the connecting hole.
7. The transmission oil supply mechanism according to claim 1, characterized in that: The rotary joint shaft is provided with an outer ring groove corresponding to the oil supply channel inlet and outlet.