Transmission supporting structure applied to electronic mechanical brake

Abstract

The utility model relates to the technical field of braking systems, in particular to a transmission supporting structure applied to an electronic mechanical brake. A transmission supporting structure applied to an electronic mechanical brake comprises a sun shaft and a driving gear, and is characterized in that one end of the sun shaft is coupled with the driving gear, and a bearing supporting piece is arranged below the driving gear; the bearing supporting piece comprises a bearing and a supporting piece body, the bearing is embedded in the center of the supporting piece body, and the supporting piece body and the bearing are of a split structure or an integrated structure. Compared with the prior art, the transmission supporting structure applied to the electronic mechanical brake is provided, after the transmission supporting structure is assembled in the shell, the sun shaft is fixed in the radial direction and the axial direction through the supporting piece, inclination in the transmission process is reduced, the deflection of the sun shaft is reduced, and the load borne by the sun gear is reduced; load distribution on the planetary gear is more uniform, the planetary gear train is stable in transmission and good in noise performance, and the service life of the planetary gear train is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of braking systems, and specifically relates to a transmission support structure applied to an electro-mechanical brake. Background Art

[0002] The sun shaft of the planetary gear train of a general gear transmission system has no support structure by itself. The support of the sun shaft is mainly realized through the meshing of the sun gear and the planetary gear. The axial limit of the sun shaft is realized by the structure on the end cover of the gearbox and there will be axial movement; because there is no support other than gear meshing, the inclination angle of the sun shaft is relatively large when it rotates. Since the load transmitted by the sun gear and the planetary gear is relatively large during the transmission process, a large load is applied to the sun shaft during gear meshing, reducing the service life of the sun gear. At the same time, the large inclination angle of the sun shaft will also cause uneven loads on the planetary gears, and most of the loads are concentrated on one planetary gear, resulting in a reduction in the overall service life of the planetary gear train.

[0003] Therefore, it is necessary to develop a new support structure so that the sun shaft has a support point, the axial position is fixed, the inclination angle of the sun shaft is small during the transmission process, the load on the sun shaft is small, the load on the planetary gears is uniform, the transmission noise of the planetary gear train is improved, and the service life of the planetary gear train is increased. Summary of the Invention

[0004] The utility model provides a transmission support structure applied to an electro-mechanical brake to overcome the deficiencies of the prior art, realizing the support and axial positioning of the sun shaft, improving the transmission noise of the planetary gear train, and increasing the service life of the planetary gear train.

[0005] To achieve the above object, a transmission support structure applied to an electro-mechanical brake is designed, including a sun shaft and a driving gear. The characteristics are as follows: One end of the sun shaft is axially connected to the driving gear, and a bearing support member is arranged below the driving gear; the bearing support member includes a bearing and a support member, and a bearing is embedded in the center of the support member. The support member and the bearing are of a split or integral structure.

[0006] The support member of the split bearing support member is of a disc-shaped structure, and a through hole is provided in the middle of the support member, and a bearing is embedded in the through hole.

[0007] An interference fit connection is provided between the inner ring of the support member and the outer ring of the bearing.

[0008] The bearing is axially connected to the sun shaft.

[0009] An interference fit connection is provided between the inner ring of the bearing and the driving gear.

[0010] An interference fit connection is provided between the inner ring of the integral bearing support member and the driving gear.

[0011] At both ends of the support member, there are "convex"-shaped panels, and connection holes are provided on the "convex"-shaped panels.

[0012] The outer diameter of the bearing support member is connected to the housing by interference press-fitting, and the bearing support member is connected to the housing by bolts through the connection holes provided on the "convex"-shaped panel.

[0013] An interference fit connection is provided between the sun shaft and the drive gear.

[0014] Compared with the prior art, the present invention provides a transmission support structure applied to an electromechanical brake. After this transmission support structure is assembled in the housing, the sun shaft is radially and axially fixed through the support member, reducing the inclination during transmission, decreasing the deflection of the sun shaft, reducing the load on the sun gear, making the load distribution on the planet gears more uniform, enabling the planetary gear train to drive smoothly with good noise performance, and improving the service life of the planetary gear train. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an exploded view of the split-type solution of the present invention.

[0016] Figure 2 is Figure 1 a cross-sectional view of the structure.

[0017] Figure 3 It is an exploded view of the integral-type solution of the present invention.

[0018] Figure 4 is Figure 3 a cross-sectional view of the structure.

[0019] Refer to Figures 1 to 4 , 1 is the sun shaft, 2 is the drive gear, 3 is the support member, and 4 is the bearing. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following further describes the present invention with reference to the drawings.

[0021] As Figure 1 , Figure 2 shown, it is the technical solution of the split-type structure of the present invention.

[0022] In this structure, the driving gear 2 and the sun shaft 1 are press-fitted as a sun shaft assembly through interference fit of hole and shaft; a support member 3 is assembled on the assembled sun shaft assembly. The inner ring of the support member 3 is connected to the sun shaft assembly through a bearing 4. The inner ring of the bearing 4 is in interference fit with the sun shaft 1, and the outer ring of the bearing 4 is in interference fit with the support member 3 to realize the connection between the support member 3 and the sun shaft 1; the outer diameter of the support member 3 is in interference fit with the housing to realize the axial positioning of the sun shaft assembly and the positioning between the sun shaft assembly and the housing. The support member 3 is fixed to the housing by bolts; the driving gear 2, the sun shaft 1, the bearing 4 and the support member 3 are assembled into a total assembly, which can realize the support of the sun shaft, fix the axial position, reduce the load on the sun gear, improve the service life of the sun gear, make the load distribution relatively more uniform during the transmission process of the planetary gear train, significantly improve the noise during the transmission process, and improve the service life of the planetary gear train.

[0023] Among them, the inner ring of the support member 3 and the outer ring of the bearing 4 are assembled into one body through interference fit; the assembly of the support member 3 and the bearing 4 is assembled with the driving gear 2, and the inner ring of the bearing 4 is in interference fit with the outer ring of the driving gear 2; the sun shaft 1 is press-fitted into the inner hole of the driving gear 2 through interference; the outer diameter of the support member 3 is press-fitted into the housing and fixed by bolts.

[0024] The working principle of this split-type transmission support structure: After this transmission support structure is assembled in the housing, the sun shaft is radially and axially fixed through the support member, reducing the inclination during the transmission process, reducing the deflection of the sun shaft, reducing the load on the sun gear, making the load distribution on the planetary gears more uniform, making the transmission of the planetary gear train stable and with good noise performance, and improving the service life of the planetary gear train.

[0025] Such as Figure 3 , Figure 4 shown, is the technical solution of the integral structure of the present invention.

[0026] The support member 3 and the bearing 4 are designed as an integral bearing support member; when assembling this integral bearing support member, first, the driving gear 2 and the sun shaft 1 are press-fitted as a sun shaft assembly through interference fit of hole and shaft; this integral bearing support member is assembled on the assembled sun shaft assembly, and the inner ring of the integral bearing support member is in interference connection with the sun shaft 1; the outer diameter of the integral bearing support member is in interference fit with the housing to realize the positioning of the sun shaft assembly and the housing. The integral bearing support member is fixed to the housing by bolts; the driving gear 2, the sun shaft 1 and the integral bearing support member are assembled into a total assembly, which can realize the support of the sun shaft 1 on the housing, reduce the load on the sun gear, improve the service life of the sun gear, make the load distribution relatively more uniform during the transmission process of the planetary gear train, and improve the overall service life of the entire planetary gear train.

[0027] Among them, the sun shaft 1 and the driving gear 2 are assembled by interference fit to form a sun shaft assembly; the inner ring of the integral bearing support is in interference fit with the sun shaft 1; the outer diameter of the integral bearing support is press-fitted into the housing by interference and fixed to the housing with bolts.

[0028] The working principle of this integral transmission support structure: After this transmission support structure is assembled in the housing, the sun shaft is supported by the support structure of the integral bearing support, reducing the inclination of the sun shaft during transmission, reducing the deflection of the sun shaft assembly, reducing the load on the sun gear, making the load distribution on the planet gears more uniform, and increasing the overall service life of the planetary gear train. The integral bearing support structure saves components, has a simple assembly structure, and effectively reduces costs.

Claims

1. A transmission support structure for an electromechanical brake, comprising a sun shaft and a drive gear, characterized in that: One end of the sun shaft (1) is axially connected to a driving gear (2), and a bearing support is provided below the driving gear (2); the bearing support comprises a bearing (4) and a support (3), the center of the support (3) being embedded with the bearing (4), and the support (3) and the bearing (4) being of a split or integrated structure.

2. The transmission support structure for an electromechanical brake according to claim 1, characterized in that: The support member (3) of the split bearing support member is a disc-shaped structure, a through hole is provided in the middle of the support member (3), and a bearing (4) is embedded in the through hole.

3. The transmission support structure for an electromechanical brake according to claim 2, characterized in that: The inner ring of the support (3) and the outer ring of the bearing (4) are connected by interference fit.

4. The transmission support structure for an electromechanical brake according to claim 2, characterized in that: The bearing (4) is axially connected to the sun shaft (1).

5. The transmission support structure for an electromechanical brake according to claim 2, characterized in that: The inner ring of the bearing (4) and the driving gear (2) are connected by an interference fit.

6. The transmission support structure for an electromechanical brake according to claim 1, characterized in that: The inner ring of the integrated bearing support and the driving gear (2) are connected by an interference fit.

7. The transmission support structure for an electromechanical brake according to claim 1, characterized in that: Convex-shaped panels are provided at both ends of the support member (3), and connection holes are provided on the convex-shaped panels.

8. The transmission support structure for an electromechanical brake according to claim 1, characterized in that: The outer diameter of the bearing support is connected to the housing by interference fit, and the bearing support is connected to the housing by bolts through a connecting hole provided on a "convex" shaped panel.

9. The transmission support structure for an electromechanical brake according to claim 1, characterized in that: The sun shaft (1) and the driving gear (2) are connected by an interference fit.

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