CN210920044U

CN210920044U - Mounting structure of box and internal gear

Info

Publication number: CN210920044U
Application number: CN201921408234.4U
Authority: CN
Inventors: 李德海; 韦涛峰; 罗永鸿
Original assignee: Shenzhen Power Motor Industrial Co Ltd
Current assignee: Shenzhen Power Motor Industrial Co Ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-07-03
Anticipated expiration: 2029-08-26

Abstract

The utility model relates to a mounting structure of box and internal gear, include: the box body is provided with a gear cavity, the center of the gear cavity is provided with a concave bearing chamber, the gear cavity is extended away from the bearing chamber and is provided with a ring groove, the ring groove is extended and sunken outwards in the radial direction and is provided with three clamping grooves which are arranged in a 120-degree surrounding array, and the gear cavity is communicated with a worm channel; the internal gear, including integrated into one piece's ring body, internal tooth and lug, the interior anchor ring of ring body is provided with the internal tooth, the outer anchor ring of ring body is provided with the three lug that sets up around the array, the lug is kept away from and is equipped with the arch on the axial terminal surface of bearing room, the lug is equipped with bellied axial terminal surface and ring body parallel and level, another axial terminal surface is in the ring body, the surface middle part of lug is equipped with the bead, the bead is equipped with bellied axial terminal surface axial extension downwards from the lug, the bead is kept away from bellied one end and is the axial extension inclined plane, the internal gear pressfitting is in the annular, ring body and annular looks adaptation, lug and draw-in groove looks adaptation, the.

Description

Mounting structure of box and internal gear

Technical Field

The utility model relates to a small-size gear box motor technical field especially relates to a mounting structure of box and internal gear.

Background

The small gear box motor is a motor-driven closed transmission speed reducer, and is widely applied to the fields of automobile electric seat adjustment, hoisting machinery, carrying machinery and the like.

In the existing small gear box motor, the matching between the box body of the gear box and the internal gear which does not rotate is not tight enough, so that the internal gear is easy to rotate and move to generate transmission error and noise, and the service life of the gear box is shortened.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a mounting structure of a case and an internal gear that prevents rotation and play of the internal gear.

In order to solve the technical problem, the utility model discloses a technical scheme be: a mounting structure of a case and an internal gear, comprising: the box body is provided with a gear cavity, the center of the gear cavity is provided with a concave bearing chamber, the gear cavity is far away from the bearing chamber and extends to form an annular groove, the annular groove radially extends outwards and is sunken with three clamping grooves which are arranged in a 120-degree surrounding array, and the gear cavity is communicated with a worm channel; the inner gear comprises an integrally formed ring body, inner teeth and a convex block, the inner annular surface of the ring body is provided with the inner teeth, the outer annular surface of the ring body is provided with three convex blocks arranged around the array, the convex blocks are far away from the axial end surface of the bearing chamber and are provided with protrusions, the convex blocks are provided with the convex axial end surfaces, the ring body is flush with the ring body, the other axial end surface of the convex blocks is arranged in the ring body, convex edges are arranged in the middle of the outer surface of the convex blocks, the convex edges are arranged on the convex blocks, the axial end surfaces of the convex edges extend downwards in the axial direction, the convex edges are far away from the convex ends of the convex edges and are inclined planes extending in the axial direction, the press-fit inner gear is arranged in the annular groove, the ring body is matched with the annular groove, the convex.

Furthermore, the outer edges of the convex edges are arc-shaped.

Furthermore, the annular groove is far away from the bearing chamber and axially extends to form a fixing groove.

Further, the clamping groove is radially recessed towards the fixing groove.

Further, the ring body axially extends and protrudes into the fixing groove.

Furthermore, the box body is provided with a baffle plate extending along the axial direction of the fixing groove.

Further, the baffle plate is provided with a notch, and the box body extends from the notch in the radial direction to form a fixing lug.

Further, the internal gear is formed by powder metallurgy in an integrated mode.

Further, the axial length of the lug is 0.8-0.92 of the axial width of the ring body, and the axial length of the convex rib is 0.4-0.5 of the axial length of the lug.

The beneficial effects of the utility model reside in that: the rotation of inner gear can be restricted in the cooperation of lug and draw-in groove, and inner gear pressfitting gets into the annular, and bead and draw-in groove elasticity extrusion, the complex is inseparabler, and the arch can effectively increase the axial pre-compaction to can prevent that inner gear from rotating and drunkenness, improve transmission precision, reduce the error, increase of service life.

Drawings

Fig. 1 is a schematic structural diagram of a mounting structure of a box and an internal gear according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a box body of an installation structure of the box body and an internal gear according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an internal gear of a mounting structure of a box and the internal gear according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the other direction of the internal gear of the mounting structure of the box and the internal gear according to the embodiment of the present invention.

Description of reference numerals:

100. a box body; 110. a gear cavity; 120. a bearing chamber; 130. a ring groove; 140. a worm channel;

150. a card slot; 160. fixing grooves; 170. a baffle plate; 180. a fixing lug; 200. an internal gear;

210. a ring body; 220. internal teeth; 230. a bump; 231. a protrusion; 232. a rib; 300. and a bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following description, with reference to the accompanying drawings and embodiments, will explain in further detail the mounting structure of the box body and the internal gear of the present invention. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Referring to fig. 1 to 4, an installation structure of a case 100 and an internal gear 200 includes: the box body 100 is provided with a gear cavity 110, the center of the gear cavity 110 is provided with a concave bearing chamber 120, the gear cavity 110 is far away from the bearing chamber 120 and extends to form an annular groove 130, the annular groove 130 extends outwards in the radial direction and is concave with three clamping grooves 150 arranged in a 120-degree surrounding array, and the gear cavity 110 is communicated with a worm channel 140; the inner gear 200 includes an integrally formed ring body 210, inner teeth 220 and protrusions 230, the inner teeth 220 are disposed on the inner annular surface of the ring body 210, the three protrusions 230 are disposed around the outer annular surface of the ring body 210, the axial end face of the projection 230 facing away from the bearing housing 120 is provided with a projection 231, the axial end face of the projection 231 provided on the projection 230 is flush with the ring body 210, and the other axial end face is in the ring body 210, a convex rib 232 is arranged in the middle of the outer surface of the projection 230, the convex rib 232 axially extends downwards from the axial end surface of the projection 230 provided with the projection 231, one end of the protruding rib 232, which is far away from the protrusion 231, is an axially extending inclined surface, the inner gear 200 is press-fit in the ring groove 130, the ring body 210 is adapted to the ring groove 130, the protrusion 230 is adapted to the slot 150, the axial end surface of the inner gear 200 facing away from the protrusion 231 is in planar contact with the ring groove 130.

The rotation of internal gear 200 can be restricted in the cooperation of lug 230 and draw-in groove 150, and internal gear 200 pressfitting gets into annular 130, and bead 232 and draw-in groove 150 elasticity extrusion, and the complex is inseparabler, and arch 231 can effectively increase the axial pre-compaction to can prevent that internal gear 200 from rotating and the drunkenness, improve transmission precision, reduce the error, increase of service life. The end of the rib 232 remote from the projection 231 is formed as an axially extending slope, so that the process of mounting the internal gear 200 into the case 100 is simplified. The axial end surface of the inner gear 200 facing away from the protrusion 231 is attached to the plane of the ring groove 130, so that the stress is uniform, and the service life of the case 100 with lower strength than the inner gear 200 is prolonged.

Generally, the internal teeth 220 are straight teeth, and preferably, the internal teeth 220 are straight teeth having an involute tooth profile.

Preferably, the protrusion 231 is a circular protrusion 231.

Typically, the bearing chamber 120 is comprised of two annular grooves, one of which fits into the bearing 300 and the other of which fits into the shaft.

Referring to fig. 3, the outer edge of the rib 232 is arc-shaped.

Avoid fish tail draw-in groove 150 to lead to the inseparable degree of assembly to descend, avoid sharp outer arris fish tail operating personnel, avoid sharp outer arris damage to lead to the thickness of bead 232 to descend and make the inseparable degree of assembly descend.

Referring to fig. 1 and 2, the ring groove 130 extends axially away from the bearing housing 120 to form a retaining groove 160.

Facilitating assembly of the case 100 with the case cover.

Referring to fig. 1 and 2, the locking groove 150 is radially recessed toward the locking groove 160.

The depth of the card slot 150 and the thickness of the bump 230 are increased, and the stability is improved.

Referring to fig. 1, the ring body 210 axially extends and protrudes into the fixing groove 160.

The axial press-fit of the internal gear 200 is enhanced.

Referring to fig. 1 and 2, the case 100 has a baffle 170 extending axially along the fixing groove 160.

The sealing performance of the tank 100 is enhanced.

Referring to fig. 1 and 2, the baffle 170 has a notch from which the housing 100 extends radially with a securing lug 180.

The assembly of the case 100 is facilitated, and the compactness of the assembly is improved.

Preferably, the inner gear 200 is integrally formed by powder metallurgy.

Convenient processing, uniform components, high strength and suitability for mass production.

Preferably, the axial length of the protrusion 230 is 0.8-0.92 of the axial width of the ring body 210, and the axial length of the rib 232 is 0.4-0.5 of the axial length of the protrusion 230.

In summary, the utility model provides an installation structure of the box body and the inner gear, which can prevent the inner gear from rotating and moving, improve the transmission precision, reduce the error and prolong the service life; the assembly is quick and simple, and the production efficiency is improved.

The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above description in any form, and although the present invention has been disclosed with reference to the preferred embodiment, it is not limited to the present invention, and any skilled person in the art can make modifications or changes equivalent to the equivalent embodiment of the above embodiments without departing from the scope of the present invention.

Claims

1. The utility model provides a mounting structure of box and internal gear which characterized in that includes:

the box body is provided with a gear cavity, the center of the gear cavity is provided with a concave bearing chamber, the gear cavity is far away from the bearing chamber and extends to form an annular groove, the annular groove radially extends outwards and is sunken with three clamping grooves which are arranged in a 120-degree surrounding array, and the gear cavity is communicated with a worm channel;

the inner gear comprises an integrally formed ring body, inner teeth and a convex block, the inner annular surface of the ring body is provided with the inner teeth, the outer annular surface of the ring body is provided with three convex blocks arranged around the array, the convex blocks are far away from the axial end surface of the bearing chamber and are provided with protrusions, the convex blocks are provided with the convex axial end surfaces, the ring body is flush with the ring body, the other axial end surface of the convex blocks is arranged in the ring body, convex edges are arranged in the middle of the outer surface of the convex blocks, the convex edges are arranged on the convex blocks, the axial end surfaces of the convex edges extend downwards in the axial direction, the convex edges are far away from the convex ends of the convex edges and are inclined planes extending in the axial direction, the press-fit inner gear is arranged in the annular groove, the ring body is matched with the annular groove, the convex.

2. The mounting structure for the casing and the internal gear according to claim 1, wherein the outer edges of the projected ridges are curved.

3. A mounting structure for a casing and an internal gear according to claim 1, wherein the ring groove has a fixing groove extending in an axial direction away from the bearing housing.

4. A mounting structure of a casing and an internal gear in accordance with claim 3, wherein said catching groove is recessed radially toward said holding groove.

5. A mounting structure for a casing and an internal gear according to claim 3, wherein the ring body axially extends and protrudes into the fixing groove.

6. A mounting structure of a casing and an internal gear according to claim 3, wherein a baffle plate extends from the casing in an axial direction of the fixing groove.

7. A mounting structure for a casing and an internal gear according to claim 6, wherein the baffle has a notch, and the casing has a fixing lug radially extending from the notch.

8. A mounting structure of a casing and an internal gear in accordance with claim 1, wherein the internal gear is integrally formed by powder metallurgy.

9. A mounting structure for a casing and an internal gear according to claim 1, wherein an axial length of said projection is 0.8 to 0.92 of an axial width of said ring body, and an axial length of said rib is 0.4 to 0.5 of an axial length of said projection.