CN209976683U

CN209976683U - Speed reduction gear ring of vehicle starter

Info

Publication number: CN209976683U
Application number: CN201920345730.3U
Authority: CN
Inventors: 王静; 徐红均; 陈�峰
Original assignee: Nantong Qianbao Auto Parts Co Ltd
Current assignee: Nantong Qianbao Auto Parts Co Ltd
Priority date: 2019-03-18
Filing date: 2019-03-18
Publication date: 2020-01-21
Anticipated expiration: 2029-03-18

Abstract

The utility model discloses a vehicle starter speed reduction ring gear, which relates to the technical field of starter parts and comprises a ring gear body, wherein one end of the ring gear body is coaxially connected with a driving end cover, the driving end cover is provided with a plurality of screws which penetrate through the driving end cover and are connected in the ring gear body in a threaded manner, the tail part of each screw is provided with a thread, a post rod with an outer diameter larger than the major diameter of the thread is arranged between the thread and the head part of the screw on each screw, the ring gear body is connected with a plurality of balls, and each ball slides and rolls along the radial direction of the ring gear and; when the ball is positioned at one end of the sliding path close to the circle center of the gear ring, the ball is partially blocked on the moving path of the outer peripheral surface of the post rod; when the ball is positioned at one end of the sliding path far away from the circle center of the gear ring, the part of the ball extends out of the peripheral surface of the gear ring body. The gear ring can be further positioned in the shell, the stability of the position of the speed reduction gear ring is improved, and meanwhile, the assembly precision of the gear ring is improved.

Description

Speed reduction gear ring of vehicle starter

Technical Field

The utility model relates to a starter part technical field, in particular to automobile-used starter speed reduction ring gear.

Background

The planetary gear reducer is also called a planetary reducer and a servo reducer. In the reducer family, the planetary reducer is widely applied to transmission systems such as servo motors, stepping motors, direct current motors and the like due to the advantages of small size, high transmission efficiency, wide reduction range, high precision and the like.

In the traditional starter, the gear ring body and the driving end cover are connected and positioned through the long bolt, and due to the lack of positioning of the gear ring and the shell, the vibration of the machine during working easily causes the axial or circumferential movement of the gear ring, and the assembly precision is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an automobile-used starter speed reduction ring gear, it can further fix a position the position of ring gear in the casing, improves the stability of speed reduction ring gear position, improves its assembly precision simultaneously.

The above technical purpose of the present invention can be achieved by the following technical solutions:

a vehicle starter speed reduction gear ring comprises a gear ring body, wherein one end of the gear ring body is coaxially connected with a driving end cover, the driving end cover is provided with a plurality of screws which penetrate through the driving end cover and are in threaded connection with the gear ring body, the tail part of each screw is provided with a thread, a post rod with the outer diameter larger than the major diameter of the thread is arranged between the thread and the head part of the screw on each screw, the gear ring body is connected with a plurality of balls, and the balls slide and roll along the radial direction of the gear ring body and are positioned on one side, far away from the center; when the ball is positioned at one end of the sliding path close to the circle center of the gear ring body, the ball is partially blocked on the moving path of the outer peripheral surface of the post rod and completely positioned between the moving path of the screw thread on the screw and the outer peripheral surface of the gear ring body; when the ball is positioned at one end of the sliding path of the ball, which is far away from the circle center of the gear ring body, the ball partially extends out of the peripheral surface of the gear ring body and is completely positioned outside the motion path of the peripheral surface of the post rod; the sliding path of the ball is provided with a part which is blocked on the moving path of the outer peripheral surface of the post rod and partially extends out of the outer peripheral surface of the gear ring body.

Furthermore, one end of the post rod close to the screw thread is provided with a chamfer.

Furthermore, a plurality of assembling positioning columns are arranged on the peripheral surface of the driving end cover.

Furthermore, a plurality of positioning blocks are arranged on one side, close to the gear ring body, of the driving end cover and are abutted against the outer peripheral surface of the gear ring body.

Furthermore, a slide way for rolling and sliding of the balls is fixed in the gear ring body, and the inner diameters of two ends of the slide way are smaller than the radius of the balls and the length of the slide way is smaller than the diameter of the balls.

Still further, the slide is mounted in the ring gear body by interference fit.

To sum up, the utility model discloses following beneficial effect has:

1. the position of the gear ring in the shell is further positioned through the balls, the structure is simple, the original structural shape is slightly changed, the stability of the position of the speed reduction gear ring is improved, and meanwhile, the assembly precision of the speed reduction gear ring is improved;

2. the processing difficulty of the gear ring is reduced through the arrangement of the slide way, the gear ring is convenient to process, and the production cost is reduced.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a partial sectional view of the present invention;

fig. 3 is an enlarged schematic view of a portion a of fig. 2.

In the figure, 1, a ring gear body; 2. a drive end cap; 21. a screw; 211. a post rod; 212. chamfering; 22. assembling a positioning column; 23. positioning blocks; 3. a ball bearing; 31. a slideway.

Detailed Description

The following description will be further described with reference to the accompanying drawings, which are not intended to limit the present invention.

As shown in fig. 1 and 2, a vehicle starter reduction gear ring comprises a gear ring body 1, the gear ring body 1 is processed by powder metallurgy and is integrally formed, one end of the gear ring body 1 is coaxially connected with a driving end cover 2, two screws 21 which penetrate through the driving end cover 2 and are in threaded connection with the gear ring body 1 are arranged on the driving end cover 2, the screws 21 are arranged along the axial direction of the gear ring body 1 and are symmetrical about the axis of the gear ring body 1, the tail part of each screw 21 is provided with a thread, a post rod 211 with an outer diameter larger than the major diameter of the thread is arranged between the thread and the head part of each screw 21 on each screw 21, and each screw 21 is an inner.

As shown in fig. 1, four assembly positioning posts 22 are uniformly distributed on the outer peripheral surface of the driving end cover 2, so as to position the whole gear ring in the housing during assembly; in the embodiment, the driving end cover 2, the positioning blocks 23 and the positioning columns 22 are integrally formed to position the relative positions when the gear ring body 1 and the driving end cover 2 are fixed, so that the fixing of the screws 21 is facilitated.

As shown in fig. 2 and 3, two balls 3 are connected in the gear ring body 1 and respectively located at two ends of the diameter of the gear ring body 1, and the balls 3 slide and roll along the radial direction of the gear ring body 1 and are located on one side of the screw 21 away from the circle center of the gear ring body 1; when the ball 3 is positioned at one end of the sliding path close to the circle center of the gear ring body 1, the ball 3 is partially blocked on the moving path of the outer peripheral surface of the column rod 211 and completely positioned between the moving path of the screw thread on the screw 21 and the outer peripheral surface of the gear ring body 1; when the ball 3 is positioned at one end of the sliding path far away from the circle center of the gear ring body 1, the ball 3 partially extends out of the peripheral surface of the gear ring body 1 and is completely positioned outside the moving path of the peripheral surface of the column rod 211; the sliding path of the ball 3 is blocked on the moving path of the outer peripheral surface of the post rod 211 and partially extends out of the outer peripheral surface of the gear ring body 1; a groove for the rolling ball 3 to roll into is arranged at the corresponding position in the shell mounted by the gear ring.

As shown in fig. 3, a slideway 31 for rolling and sliding the balls 3 is fixed in the gear ring body 1, the inner diameter of both ends of the slideway 31 is smaller than the radius of the balls 3, and the length of the slideway 31 is smaller than the diameter of the balls 3; for the convenience of assembly, the slide 31 is installed in the ring gear body 1 by interference fit. In this embodiment, the length of the slide way 31 is equal to the diameter of the ball 3 minus the maximum length that the ball 3 can extend out of the slide way 31.

As shown in fig. 3, the end of the post 211 near the screw thread of the screw 21 is provided with a chamfer 212, and the diameter of the chamfer 212 near the screw thread is equal to the major diameter of the screw thread to smoothly push the ball 3 outward.

The installation process comprises the following steps:

firstly, the whole gear ring is preliminarily fixed by a screw 21, and the screw 21 is not completely screwed down, so that the ball 3 can still slide in the slideway 31; then, after the gear ring is positioned and installed in the machine shell through the assembling positioning column 22, the screw 21 is completely screwed down, the ball 3 is pushed by the column rod 211 to roll outwards and slide into the corresponding groove on the inner side surface of the machine shell, and the assembly of the whole gear ring is completed.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications or equivalent substitutions within the spirit and scope of the present invention, and such modifications or equivalent substitutions should also be considered as falling within the scope of the present invention.

Claims

1. The utility model provides a vehicle starter reduction ring gear which characterized in that: the gear ring comprises a gear ring body (1), wherein one end of the gear ring body (1) is coaxially connected with a driving end cover (2), a plurality of screws (21) which penetrate through the driving end cover (2) and are in threaded connection with the gear ring body (1) are arranged on the driving end cover (2), threads are arranged at the tail of each screw (21), a post rod (211) with the outer diameter larger than the major diameter of each thread is arranged between each thread and the head of each screw (21) on each screw (21), a plurality of balls (3) are connected in the gear ring body (1), and each ball (3) slides and rolls along the gear ring body (1) in the radial direction and is arranged on one side, far away from the circle center of the gear ring body; when the ball (3) is positioned at one end of the sliding path close to the circle center of the gear ring body (1), the ball (3) is partially blocked on the moving path of the outer peripheral surface of the column rod (211) and completely positioned between the moving path of the upper threads of the screw (21) and the outer peripheral surface of the gear ring body (1); when the ball (3) is positioned at one end of the sliding path far away from the circle center of the gear ring body (1), the ball (3) partially extends out of the outer peripheral surface of the gear ring body (1) and is completely positioned outside the motion path of the outer peripheral surface of the post rod (211); the sliding path of the ball (3) is provided with a part which is blocked on the moving path of the outer peripheral surface of the post rod (211) and partially extends out of the outer peripheral surface of the gear ring body (1).

2. The starter reduction ring gear for vehicles according to claim 1, characterized in that: and a chamfer (212) is arranged at one end of the post rod (211) close to the screw thread of the screw (21).

3. The starter reduction ring gear for vehicles according to claim 1, characterized in that: the peripheral surface of the driving end cover (2) is provided with a plurality of assembling positioning columns (22).

4. The starter reduction ring gear for vehicles according to claim 3, characterized in that: one side, close to the gear ring body (1), of the driving end cover (2) is provided with a plurality of positioning blocks (23), and the positioning blocks (23) are abutted to the outer peripheral surface of the gear ring body (1).

5. The starter reduction ring gear for vehicles according to claim 1, characterized in that: the gear ring is characterized in that a slide way (31) for rolling and sliding of the balls (3) is fixed in the gear ring body (1), and the inner diameters of two ends of the slide way (31) are smaller than the radius of the balls (3) and the length of the slide way is smaller than the diameter of the balls (3).

6. The starter reduction ring gear for vehicles according to claim 5, characterized in that: the slide way (31) is installed in the gear ring body (1) in an interference fit mode.