CN211315056U

CN211315056U - Gear transmission box with small tooth difference

Info

Publication number: CN211315056U
Application number: CN201921704132.7U
Authority: CN
Inventors: 韦涛峰; 罗永鸿; 闫鲲
Original assignee: Shenzhen Power Motor Industrial Co Ltd
Current assignee: Shenzhen Power Motor Industrial Co Ltd
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-08-21
Anticipated expiration: 2029-10-11

Abstract

The utility model relates to a gear transmission box body with small tooth difference, wherein an annular boss can be arranged to match a central shaft to limit a worm gear and limit the radial movement of the worm gear; the clamping groove is used for embedding the supporting frame, and supporting force is provided in the axial direction, so that the axial pressure of the worm wheel is prevented from being too large; the setting of lug is injectd the apron in the lug, fixes a position before the spiro union, and the auxiliary bolt is injectd for the apron is fixed more stably.

Description

Gear transmission box with small tooth difference

Technical Field

The utility model relates to a small-size gear box motor technical field especially relates to a few tooth difference gear drive box.

Background

The small tooth difference gear transmission is a gear transmission consisting of a pair of internal gears with small tooth difference and an output mechanism, and a small tooth difference gear transmission box body is an important element influencing transmission performance. The internal space structure of the existing gear transmission box body with small tooth difference is not compact enough, gear shifting is easy to occur, noise is large, and abrasion is large; the assembly effect between the existing gear transmission box body with small tooth difference and the cover plate is poor, the efficiency is low, and the box body and the cover plate are fixed unstably.

SUMMERY OF THE UTILITY MODEL

In view of the above, there is a need for a gear transmission housing with small tooth difference that is stable in assembly.

In order to solve the technical problem, the utility model discloses a technical scheme be: a few tooth difference gear drive box, includes that integrated into one piece forms: the worm chamber is provided with a worm channel, one end of the worm channel is provided with a connecting seat, the other end of the worm channel is provided with a bearing chamber, the center of the connecting seat is provided with a worm inlet hole communicated with the worm channel, the connecting seat extends outwards around the worm inlet hole to form a connecting column, and a connecting hole is formed in the connecting column;

a gear chamber comprising: one side of a radial plane of the worm wheel cavity is communicated with the worm way, an annular boss is arranged at the center of the worm wheel cavity, and a shaft hole is formed in the center of the annular boss; the gear chamber is parallel to a radial surface of the worm gear cavity and surrounds the worm gear cavity to form the end surface, and a plurality of fixing holes are formed in the end surface; the first annular step surface and the worm gear cavity are formed by concentric and radial outward extension; the second annular step surface is formed by extending outwards along the first annular step surface in the radial direction, and extends to the end surface in the axial direction; the clamping grooves axially extend from the end face to the worm wheel cavity to form four small clamping grooves and two large clamping grooves with the same depth, the small clamping grooves and the large clamping grooves divide the first annular step surface and the second annular step surface into 6 arc-shaped step bodies, the two large clamping grooves are oppositely arranged by taking the shaft hole as the center, and two small clamping grooves are respectively arranged on two sides of the two large clamping grooves; the lug, the outside protrusion that extends of terminal surface axial has at least three the lug, the lug towards the one side in shaft hole is for using the center in shaft hole is the face of rounding at center, every the lug the face diameter of rounding is the same.

Further, arc-shaped convex bodies which are convex inwards in the radial direction of the shaft hole are arranged in the two large clamping grooves, and the diameters of the arc-shaped convex bodies facing the arc surface of the shaft hole are the same.

Furthermore, the fixing holes are arranged on the end face in a surrounding array by taking the shaft hole as a center.

Furthermore, the two connecting columns are symmetrically arranged by taking the worm inlet hole as a center, and the two connecting columns are obliquely arranged so that one connecting column is tightly attached to the bottom of the gear chamber.

Further, the bearing chamber extends to form three grooves around the array.

Furthermore, the bearing chamber is far away from the connecting seat and extends to form a placing groove, a limiting round table is arranged at the center of the placing groove, and a through small hole is formed in the center of the limiting round table.

Furthermore, the convex block is approximately triangular, and one surface back to the shaft hole is flush with the shell of the gear chamber.

Furthermore, the number of the convex blocks is three, one of the convex blocks is arranged at one end, which is close to the worm chamber and is far away from the connecting seat, and the other two convex blocks are arranged at the other side opposite to the shaft hole.

The beneficial effects of the utility model reside in that: the arrangement of the annular boss can be matched with the central shaft to limit the worm wheel and limit the radial movement of the worm wheel; the clamping groove is used for embedding the supporting frame, and supporting force is provided in the axial direction, so that the axial pressure of the worm wheel is prevented from being too large; the setting of lug is injectd the apron in the lug, fixes a position before the spiro union, and the auxiliary bolt is injectd for the apron is fixed more stably.

Drawings

Fig. 1 is a schematic structural view of a gear transmission box with small tooth difference according to an embodiment of the present invention;

fig. 2 is a schematic structural view of another direction of a gear transmission box with small tooth difference according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another direction of a small tooth difference gear transmission box body according to an embodiment of the present invention;

fig. 4 is a schematic structural view of a worm chamber of a gear transmission box with small tooth difference according to an embodiment of the present invention.

Description of reference numerals:

100. a worm chamber; 110. a worm way; 120. a bearing chamber; 121. a groove; 122. a placement groove;

123. a limiting round table; 130. a connecting seat; 131. connecting columns; 132. a worm is inserted into the hole; 200. a gear chamber;

210. a worm gear cavity; 211. an annular boss; 212. a shaft hole; 220. a first annular step surface;

230. a second annular step surface; 241. a large clamping groove; 242. an arc-shaped convex body; 243. a small card slot;

250. an end face; 251. a bump; 252. and (7) fixing holes.

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 the present invention in further detail with respect to a gear transmission box with small teeth difference. 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. 1-4, a gear box with small teeth difference includes: the worm chamber 100 is provided with a worm channel 110, one end of the worm channel 110 is provided with a connecting seat 130, the other end of the worm channel 110 is provided with a bearing chamber 120, the center of the connecting seat 130 is provided with a worm inlet hole 132 communicated with the worm channel 110, the connecting seat 130 extends outwards around the worm inlet hole 132 to form a connecting column 131, and the connecting column 131 is internally provided with a connecting hole;

a gear chamber 200, comprising: a worm wheel cavity 210, wherein one side of the radial plane of the worm wheel cavity 210 is communicated with a worm way 110, an annular boss 211 is arranged at the center of the worm wheel cavity 210, and a shaft hole 212 is arranged at the center of the annular boss 211; the end face 250 is formed by the gear chamber 200 being parallel to the radial surface of the worm gear cavity 210 and surrounding the worm gear cavity 210, and a plurality of fixing holes 252 are formed in the end face 250; a first annular step surface 220 formed to extend radially outward concentrically with the worm wheel chamber 210; a second annular step surface 230 formed to extend radially outwardly along the first annular step surface 220, the second annular step surface 230 extending axially to the end surface 250; the clamping grooves axially extend from the end face 250 to the direction of the worm wheel cavity 210 to form four small clamping grooves 243 and two large clamping grooves 241 with the same depth, the small clamping grooves 243 and the large clamping grooves 241 divide the first annular stepped surface 220 and the second annular stepped surface 230 into 6 arc-shaped stepped bodies, the two large clamping grooves 241 are oppositely arranged by taking the shaft hole 212 as the center, and two small clamping grooves 243 are respectively arranged on two sides of the two large clamping grooves 241; the lugs 251 and the end faces 250 are provided with at least three lugs 251 extending outwards in the axial direction, one surface of each lug 251 facing the shaft hole 212 is a segmental surface taking the center of the shaft hole 212 as the center, and the diameters of the segmental surfaces of each lug 251 are the same.

The annular boss 211 can limit the worm wheel by matching with the central shaft, and limit the radial movement of the worm wheel; the clamping groove is used for embedding the supporting frame, and supporting force is provided in the axial direction, so that the axial pressure of the worm wheel is prevented from being too large; the arrangement of the projection 251 limits the cover plate in the projection 251, positioning is carried out before screwing, and an auxiliary bolt is limited, so that the cover plate is more stable in fixation.

Preferably, the large catch 241 near the worm chamber 100 is formed by a baffle extending radially toward the shaft hole 212 from the worm chamber.

Referring to fig. 1-2, the two large slots 241 are provided therein with arc-shaped protrusions 242 extending radially inward toward the shaft hole 212, and the diameters of the arc-shaped surfaces of the arc-shaped protrusions 242 facing the shaft hole 212 are the same.

The provision of the arc-shaped protrusions 242 reduces the contact area and reduces the rotational friction.

Referring to fig. 1-2, the fixing holes 252 are disposed on the end surface 250 in a surrounding array around the shaft hole 212.

Preferably, the end surface 250 is provided with a plurality of stress grooves, so that the elasticity can be increased and the noise can be reduced through the stress grooves.

Generally, the securing bore 252 is an axially outwardly threaded blind bore, which may be provided with a counterbore configuration as desired.

The stress is balanced and the service life is long. Referring to the drawings, the end surface 250 is substantially rectangular, and a fixing hole 252 is formed at each of four corners of the end surface 250, wherein two fixing holes 252 are formed in the housing of the worm chamber 100.

Referring to fig. 3, two connecting columns 131 are symmetrically arranged around the worm inlet 132, and the two connecting columns 131 are obliquely arranged so that one connecting column 131 is tightly attached to the bottom of the gear chamber 200.

The occupied space is small, and the structure is compact. Generally, the connecting hole of the connecting column 131 is a blind hole facing away from the bearing chamber 120, and is generally a screw hole, and a counter bore structure can be arranged as required.

Referring to fig. 3-4, the bearing housing 120 is extended with three grooves 121 disposed around the array.

For placing non-rotating sliding bearings.

Referring to fig. 3-4, the bearing chamber 120 is provided with a placing groove 122 extending away from the connecting base 130, a limiting circular truncated cone 123 is disposed at the center of the placing groove 122, and a through hole is disposed at the center of the limiting circular truncated cone 123.

The placement grooves 122 are used for placing support columns that support the slide bearings.

Referring to fig. 1-2, the protrusion 251 is approximately triangular, and a surface facing away from the shaft hole 212 is flush with the housing of the gear chamber 200.

The approximately triangular support columns can be pre-positioned and can limit the rotation of the cover plate.

Referring to fig. 1-2, three protrusions 251 are provided, wherein one protrusion 251 is disposed near one end of the worm chamber 100 away from the connecting seat 130, and the other two protrusions 251 are disposed at the other side of the shaft hole 212.

Reasonable structure and stable fixation.

To sum up, the arrangement of the annular boss can cooperate with the central shaft to limit the worm gear and limit the radial movement of the worm gear; the clamping groove is used for embedding the supporting frame, and supporting force is provided in the axial direction, so that the axial pressure of the worm wheel is prevented from being too large; the setting of lug is injectd the apron in the lug, fixes a position before the spiro union, and the auxiliary bolt is injectd for the apron is fixed more stably.

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 few tooth difference gear drive box which characterized in that, including integrated into one piece formation:

the worm chamber is provided with a worm channel, one end of the worm channel is provided with a connecting seat, the other end of the worm channel is provided with a bearing chamber, the center of the connecting seat is provided with a worm inlet hole communicated with the worm channel, the connecting seat extends outwards around the worm inlet hole to form a connecting column, and a connecting hole is formed in the connecting column;

a gear chamber comprising:

one side of a radial plane of the worm wheel cavity is communicated with the worm way, an annular boss is arranged at the center of the worm wheel cavity, and a shaft hole is formed in the center of the annular boss;

the gear chamber is parallel to a radial surface of the worm gear cavity and surrounds the worm gear cavity to form the end surface, and a plurality of fixing holes are formed in the end surface;

the first annular step surface and the worm gear cavity are formed by concentric and radial outward extension;

the second annular step surface is formed by extending outwards along the first annular step surface in the radial direction, and extends to the end surface in the axial direction;

the clamping grooves axially extend from the end face to the worm wheel cavity to form four small clamping grooves and two large clamping grooves with the same depth, the small clamping grooves and the large clamping grooves divide the first annular step surface and the second annular step surface into 6 arc-shaped step bodies, the two large clamping grooves are oppositely arranged by taking the shaft hole as the center, and two small clamping grooves are respectively arranged on two sides of the two large clamping grooves;

the lug, the outside protrusion that extends of terminal surface axial has at least three the lug, the lug towards the one side in shaft hole is for using the center in shaft hole is the face of rounding at center, every the lug the face diameter of rounding is the same.

2. The gear transmission case with small tooth difference as claimed in claim 1, wherein arc-shaped convex bodies protruding inwards in the radial direction of the shaft hole are arranged in the two large clamping grooves, and the diameters of arc surfaces of the arc-shaped convex bodies facing the shaft hole are the same.

3. A gear housing with reduced tooth differential as claimed in claim 1, wherein said fastening holes are disposed in a circumferential array about said axial bore on said end surface.

4. The gear box body with small tooth difference as claimed in claim 1, wherein two connecting columns are symmetrically arranged with the worm inlet hole as a center, and the two connecting columns are obliquely arranged so that one connecting column is tightly attached to the bottom of the gear chamber.

5. A gear housing according to claim 1, wherein the bearing chamber extends over three circumferential arrays of recesses.

6. The transmission case body with few gear differences as claimed in claim 5, wherein the bearing chamber extends away from the connecting seat to form a placing groove, a limiting circular truncated cone is arranged at the center of the placing groove, and a through small hole is formed in the center of the limiting circular truncated cone.

7. The gear box body of claim 1, wherein the protrusion is approximately triangular, and a surface facing away from the shaft hole is flush with the housing of the gear chamber.

8. The transmission case of claim 1, wherein there are three protrusions, one of the protrusions is located near one end of the worm chamber away from the connecting seat, and the other two protrusions are located at the other side of the shaft hole.