Gear supporting structure applied to electronic mechanical brake

Abstract

The utility model relates to the technical field of braking systems, in particular to a gear supporting structure applied to an electronic mechanical brake. A gear supporting structure applied to an electronic mechanical brake comprises a gear shaft and a gear, and is characterized in that the gear shaft is coupled with the gear, a bearing is embedded in an inner hole of the gear, and the inner hole of the gear is in interference fit connection with the bearing; the bearing is one of a deep groove ball bearing, a needle bearing and a sliding bearing. Compared with the prior art, the gear supporting structure applied to the electronic mechanical brake has the advantages that the displacement of the gear in the axial direction is reduced, and noise caused by collision with the shell and the end cover during axial displacement of the gear is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of braking systems, and particularly to a gear support structure applied to an electromechanical brake. Background Art

[0002] In a general gear transmission system, the inner hole of the gear assembly is in clearance fit with the gear shaft, and the gear has no axial fixation. Axial limitation is mainly achieved through the housing and the end cover, and the distance between the gear assembly and the housing and the end cover is relatively large. The gear can move axially. When the gear rotates, due to axial vibration or an axial force, it moves upward or downward axially, generating a large impact force and colliding with the housing and the end cover, resulting in abnormal noise. Therefore, it is necessary to develop a gear support structure to reduce the axial movement of the gear and avoid collision abnormal noise caused by a large axial force. Summary of the Invention

[0003] The utility model aims to overcome the deficiencies of the prior art and provides a gear support structure applied to an electromechanical brake to achieve axial fixation of the gear and avoid gear collision noise.

[0004] To achieve the above object, a gear support structure applied to an electromechanical brake is designed, including a gear shaft and a gear. The characteristics are as follows: The gear is pivotally connected to the gear shaft, and a bearing is embedded in the inner hole of the gear, and an interference fit connection is adopted between the inner hole of the gear and the bearing; The bearing is one of a deep groove ball bearing, a needle bearing, and a sliding bearing.

[0005] A deep groove ball bearing is embedded in the inner hole of the gear. The inner ring of the deep groove ball bearing is pivotally connected to the gear shaft, and an adhesive is used for fixation between the inner ring of the deep groove ball bearing and the gear shaft.

[0006] A deep groove ball bearing is embedded in the inner hole of the gear. The inner ring of the deep groove ball bearing is pivotally connected to the gear shaft. An elastic element, a gasket, and an axial retaining ring are sequentially pivotally connected above the deep groove ball bearing.

[0007] A retaining ring groove is provided on the outer edge of the top of the gear shaft, and the axial retaining ring is installed in the retaining ring groove of the gear shaft.

[0008] A clearance fit connection is adopted between the inner ring of the deep groove ball bearing and the gear shaft.

[0009] A needle bearing or a sliding bearing is embedded in the inner hole of the gear. A gasket and an axial retaining ring are sequentially pivotally connected above the needle bearing or the sliding bearing.

[0010] A retaining ring groove is provided on the outer edge of the top of the gear shaft, and the axial retaining ring is installed in the retaining ring groove of the gear shaft.

[0011] A clearance fit connection is adopted between the inner ring of the needle bearing or the sliding bearing and the gear shaft.

[0012] A housing is provided on the outer side of the gear shaft, and an interference fit connection is provided between the gear shaft and the housing.

[0013] Compared with the prior art, the present utility model provides a gear support structure applied to an electromechanical brake, which reduces the axial play of the gear and avoids generating noise when the gear axially moves due to collision with the housing and the end cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an exploded view of the structure of the first embodiment of the present utility model.

[0015] Figure 2 is Figure 1 a cross-sectional view of the structure.

[0016] Figure 3 It is an exploded view of the structure of the second embodiment of the present utility model.

[0017] Figure 4 is Figure 3 a cross-sectional view of the structure.

[0018] Figure 5 It is an exploded view of the structure of the third embodiment of the present utility model.

[0019] Figure 6 is Figure 5 a cross-sectional view of the structure.

[0020] Referring to Figures 1 to 6 , 1 is the gear shaft, 2 is the gear, 3 is the deep groove ball bearing, 4 is the needle bearing, 5 is the gasket, 6 is the axial retaining ring, and 7 is the elastic element. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The present utility model will be further described below with reference to the drawings.

[0022] As Figure 1 Figure 2 shown, it is a schematic diagram of the structure of the first embodiment of the present utility model.

[0023] In the structure of Solution 1, a deep groove ball bearing 3 is press-fitted into the inner hole of gear 2 to form a gear assembly. The inner ring of the gear assembly is the inner ring of the deep groove ball bearing 3. The inner ring of the deep groove ball bearing 3 has a clearance fit with the gear shaft 1. The gear shaft 1 is press-fitted and fixed with the housing hole, and corresponding retaining ring grooves are designed on the gear shaft 1. After the gear assembly is assembled onto the gear shaft 1, an elastic element 7 and a gasket 5 are assembled onto the inner ring of the deep groove ball bearing 3, and an axial retaining ring 6 is assembled into the retaining ring groove of the gear shaft 1, so that the inner ring of the deep groove ball bearing 3 is axially limited. At this time, the axial position of the gear assembly is fixed. The axial movement of gear 2 is only the axial clearance of the deep groove ball bearing 3. The gear assembly will not move up and down and collide with the housing and end cover due to the axial limitation of the deep groove ball bearing 3, avoiding the generation of collision abnormal noise.

[0024] Assembly structure of Solution 1: A deep groove ball bearing 3 is press-fitted into the inner hole of gear 2 and assembled onto the gear shaft of the housing; the elastic element 7 and the gasket 5 are sequentially assembled onto the gear shaft 1; the axial retaining ring 6 is press-fitted into the retaining ring groove on the gear shaft 1.

[0025] As Figure 1 Figure 2 shown, it is a schematic structural diagram of Solution 2 of the present invention.

[0026] In the structure of Solution 2, a deep groove ball bearing 3 is press-fitted into the inner hole of gear 2 to form a gear assembly. The inner ring of the gear assembly is the inner ring of the deep groove ball bearing 3. The inner ring of the deep groove ball bearing 3 is assembled with the gear shaft 1. The gear shaft 1 is press-fitted and fixed with the housing. After the gear assembly is assembled onto the gear shaft 1, the inner ring of the deep groove ball bearing 3 and the gear shaft 1 are fixed by gluing. This structure can axially fix the deep groove ball bearing 3 to achieve the axial position fixation of the gear assembly, and the axial movement amount is only the axial clearance of the deep groove ball bearing 3. The gear assembly will not move up and down and collide with the housing and end cover due to the axial limitation of the deep groove ball bearing 3, avoiding the generation of collision abnormal noise.

[0027] Assembly structure of Solution 2: A deep groove ball bearing 3 is press-fitted into the inner hole of gear 2 to form a gear assembly; the inner hole of the gear assembly has a clearance fit with the gear shaft of the housing for assembly; glue is applied and fixed in the clearance between the inner ring of the deep groove ball bearing 3 and the gear shaft 1.

[0028] As Figure 1 Figure 2 shown, it is a schematic structural diagram of Solution 3 of the present invention.

[0029] In the structure of Solution 3, a needle roller bearing 4 with a stamped outer ring or a sliding bearing is press-fitted into the inner hole of gear 2 as a gear assembly. The inner ring of the gear assembly has a clearance fit with gear shaft 1. Gear shaft 1 is press-fitted and fixed to the housing, and corresponding snap ring grooves are designed on gear shaft 1. After the gear assembly is assembled onto gear shaft 1, a spacer 5 is axially assembled and an axial snap ring 6 is assembled into the snap ring groove on gear shaft 1, so that the gear assembly is axially limited and there is only a small amount of clearance for axial movement. During the transmission process, the axial movement of the gear assembly is very small and no large collision noise will be generated.

[0030] Assembly structure of Solution 3: A needle roller bearing 4 or a sliding bearing is press-fitted into the inner hole of gear 2 as a gear assembly and assembled onto the gear shaft of the housing; spacer 5 is assembled; axial snap ring 6 is press-fitted into the snap ring groove on gear shaft 1.

[0031] For the gear support structures of the above three solutions, the working principle is to increase axial limitation to reduce the axial movement of the gear and avoid generating noise when the gear axially moves and collides with the housing and end cover.

Claims

1. A gear support structure used in an electronic mechanical brake, comprising a gear shaft and a gear, characterized in that: The upper shaft of the gear shaft (1) is connected to the gear (2), and a bearing is embedded in the inner hole of the gear (2), and the inner hole of the gear (2) and the bearing are connected by an interference fit; the bearing is one of a deep groove ball bearing, a needle roller bearing, and a sliding bearing.

2. The gear support structure for an electromechanical brake according to claim 1, characterized in that: A deep groove ball bearing (3) is embedded in the inner hole of the gear (2); the inner ring of the deep groove ball bearing (3) is axially connected to the gear shaft (1); and the inner ring of the deep groove ball bearing (3) and the gear shaft (1) are fixed by glue coating.

3. The gear support structure for an electromechanical brake according to claim 1, characterized in that: A deep groove ball bearing (3) is embedded in the inner hole of the gear (2); the inner ring of the deep groove ball bearing (3) is axially connected to the gear shaft (1); and an elastic element (7), a gasket (5), and an axial retaining ring (6) are axially connected in sequence above the deep groove ball bearing (3).

4. The gear support structure for an electromechanical brake according to claim 3, characterized in that: A retaining ring groove is provided at the top outer edge of the gear shaft (1), and an axial retaining ring (6) is installed in the retaining ring groove of the gear shaft (1).

5. The gear support structure for an electromechanical brake according to claim 3, characterized in that: The inner ring of the deep groove ball bearing (3) and the gear shaft (1) are connected with a clearance fit.

6. The gear support structure for an electromechanical brake according to claim 1, characterized in that: A needle roller bearing (4) or a sliding bearing is embedded in the inner hole of the gear (2), and an axial connection gasket (5) and an axial retaining ring (6) are arranged above the needle roller bearing (4) or the sliding bearing in sequence.

7. The gear support structure for an electromechanical brake according to claim 6, characterized in that: A retaining ring groove is provided at the top outer edge of the gear shaft (1), and an axial retaining ring (6) is installed in the retaining ring groove of the gear shaft (1).

8. The gear support structure for an electromechanical brake according to claim 6, characterized in that: The inner ring of the needle roller bearing (4) or the sliding bearing and the gear shaft (1) are connected with a clearance fit.

9. The gear support structure for an electromechanical brake according to claim 1, characterized in that: A housing is provided on the outer side of the gear shaft (1), and the gear shaft (1) and the housing are connected by an interference fit.

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