CN213206456U

CN213206456U - Double-lead worm gear clearance adjusting mechanism

Info

Publication number: CN213206456U
Application number: CN202021703672.6U
Authority: CN
Inventors: 杨俊博; 李红
Original assignee: Foshan Dilong Transmission Machinery Co ltd; Foshan Shangwei Transmission Technology Co ltd
Current assignee: Foshan Dilong Transmission Machinery Co ltd; Foshan Shangwei Transmission Technology Co ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-05-14
Anticipated expiration: 2030-08-17

Abstract

The utility model discloses a gap adjusting mechanism for a double-lead worm gear, which belongs to the technical field of speed reducer equipment and comprises a bearing seat and a locking disc, wherein one end of the double-lead worm is rotationally connected with the bearing seat, the bearing seat is in threaded connection with the locking disc, the locking disc is provided with a plurality of groups of tightening screw holes which are radially communicated with the inner side, the tightening screw holes are in threaded connection with copper tightening screws, the front ends of the copper tightening screws are pressed on the outer side of the bearing seat, the bearing seat is driven to adjust the position of the bearing seat along the axial direction of the double-lead worm by rotating the bearing seat, namely, the double-lead worm is driven to be finely adjusted along the axial direction, so that the gap between the double-lead worm and the worm wheel is adjusted, the double-lead worm and the worm wheel are kept tightly meshed, after the axial adjustment of the double-lead worm is completed, the front ends of the copper tightening screws are pressed on external, thereby locking the locking disc on the bearing seat, limiting the double-lead worm in the axial direction and keeping the double-lead worm and the worm wheel tightly meshed.

Description

Double-lead worm gear clearance adjusting mechanism

Technical Field

The utility model relates to a reduction gear equipment technical field, in particular to two lead worm gear clearance adjustment mechanism.

Background

At present, after a worm and gear speed reducer which is widely used is assembled, the clearance between a worm and a worm wheel is generally between 0.08 and 0.1mm, the precision is not high, the worm and gear speed reducer cannot adapt to high-precision transmission, and the clearance between the worm and the worm can be gradually increased due to abrasion after long-time operation. The clearance between the worm wheel and the worm needs to be adjusted, and the transmission precision is improved. The common adjusting method of the prior common worm gear reducer comprises the following steps: 1. the mounting shaft hole in the shell of the ordinary worm and gear speed reducer is designed into a strip-shaped shaft hole, and the gap adjustment of the worm and gear is realized by adjusting the center distance between the ordinary worm and gear along the strip-shaped shaft hole; 2. the clearance adjustment of the double-lead worm gear is realized by axially adjusting the position of the double-lead worm.

In the first method, the worm is easily displaced by the radial force of the worm wheel, and it is difficult to control the amount of adjustment of both ends of the worm at the same time when adjusting. After the double-lead worm in the second mode is subjected to axial force, axial movement is easy to occur, and meshing of the double-lead worm and the worm wheel is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect that prior art exists, the utility model provides a two lead worm gear clearance adjustment mechanism realizes the clearance adjustment of the two lead worms of worm wheel, avoids two lead worms to take place axial displacement under the stress.

The utility model provides a technical scheme that its technical problem adopted is: a double-lead worm gear clearance adjusting mechanism comprises a bearing seat and a locking disc, wherein the locking disc is fixedly connected with a speed reducer shell through a fastener, one end of a double-lead worm is rotatably connected with the bearing seat, an internal thread is arranged on the inner side of the locking disc, an external thread matched with the internal thread of the locking disc is arranged on the outer side of the bearing seat, and the bearing seat is in threaded connection with the locking disc;

the locking disc is provided with a plurality of groups of fastening screw holes which are radially communicated with the inner side, copper fastening screws are connected to the fastening screw holes in a threaded mode, and the front ends of the copper fastening screws are abutted to the outer side of the bearing seat.

Preferably, the copper set screw is a flat-head set screw, and the external thread of the bearing seat is a trapezoidal thread or a rectangular thread or a sawtooth thread.

Preferably, the fastening screw holes are symmetrically arranged on the locking disc in pairs.

Preferably, a plurality of groups of adjusting holes are arranged at the outer end part of the bearing seat.

Preferably, in another technical scheme, a plurality of groups of end surface notches are arranged on the outer end part of the bearing seat.

Preferably, an annular limiting boss is arranged in the bearing seat, two groups of tapered roller bearings are symmetrically arranged on two sides of the annular limiting boss, and the double-lead worm is rotationally connected with the two groups of tapered roller bearings.

Preferably, a guide through hole is formed in the other side of the speed reducer shell, a ball bearing is arranged in the guide through hole in a sliding mode, and the other end of the double-lead worm is connected with the ball bearing in a rotating mode.

The utility model has the advantages that:

1. because the two ends of the double-lead worm are respectively supported on the bearing seat and the ball bearing, the bearing seat is in threaded connection with the locking disc, when the reducer is assembled for the first time, the auxiliary tool is embedded into the adjusting hole or the end face gap, the bearing seat is rotated by the auxiliary tool, the bearing seat is driven to adjust the position of the bearing seat along the axial direction of the double-lead worm and back and forth, namely, the double-lead worm is driven to carry out fine adjustment along the axial direction, so that the gap between the double-lead worm and the worm gear is adjusted according to the requirements of users, even zero gap is realized, the double-lead worm and the worm gear are tightly meshed, after the axial adjustment of the double-lead worm is completed, the front ends of the copper fastening screw and the copper fastening screw are pressed on the external thread on the outer side of the bearing seat, the locking disc is locked on the bearing seat, the double-lead worm is limited in the axial direction, and the double-lead, when the double-lead worm needs to be adjusted again, the bearing seat can be rotated for adjustment only by loosening the copper set screw;

2. due to the fact that the copper fastening screw with low hardness is adopted, the fastening screw can be prevented from damaging the external thread of the bearing seat.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment 1 of the present invention in use;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a front view of embodiment 1 of the present invention;

fig. 4 is a perspective view of embodiment 1 of the present invention;

fig. 5 is a perspective view of a locking plate in an embodiment of the present invention;

FIG. 6 is a front view of a copper set screw according to an embodiment of the present invention;

fig. 7 is a front view of embodiment 2 of the present invention.

In the figure, 10, a bearing seat, 11, an annular limiting boss, 12, a tapered roller bearing, 13, an adjusting hole, 14, an end face notch, 20, a locking disc, 21, a fastening screw hole, 22, a copper fastening screw, 30, a reducer shell, 31, a guide through hole, 32, a ball bearing and 40 are double-lead worm.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features related to the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Example 1

As shown in the attached figures 1-6, the utility model provides a double-lead worm gear clearance adjusting mechanism, which comprises a bearing seat 10 and a locking disk 20, wherein the locking disk 20 is annular, the locking disk 20 is fixedly connected with a reducer casing 30 through a fastener, an annular limiting boss 11 is arranged in the bearing seat 10, two groups of tapered roller bearings 12 are symmetrically arranged on two sides of the annular limiting boss 11, a double-lead worm 40 is rotatably connected with the two groups of tapered roller bearings 12, a guide through hole 31 is arranged on the other side of the reducer casing 30, a ball bearing 32 is slidably arranged in the guide through hole 31, the other end of the double-lead worm 40 is rotatably connected with the ball bearing 32, an inner side of the locking disk 20 is provided with an inner thread, an outer thread matched with the inner thread of the locking disk 20 is arranged on the outer side of the bearing seat 10, the bearing seat 10 is in, the tightening screw holes 21 are symmetrically arranged on the locking disc 20 in pairs, copper tightening screws 22 are in threaded connection with the tightening screw holes 21, the front ends of the copper tightening screws 22 are pressed against the outer side of the bearing seat 10, a plurality of groups of adjusting holes 13 are arranged at the outer end part of the bearing seat 10, as the two ends of the double-lead worm 40 are respectively supported on the bearing seat 10 and the ball bearing 32, and the bearing seat 10 is in threaded connection with the locking disc 20, when the reducer is assembled for the first time, an auxiliary tool is embedded into the adjusting holes 13, the bearing seat 10 is rotated by the auxiliary tool, the bearing seat 10 is driven to adjust the position of the bearing seat 10 along the axial direction and the front and back direction of the double-lead worm 40, namely, the double-lead worm 40 is driven to carry out fine adjustment along the axial direction, so that the gap between the double-lead worm 40 and the worm is adjusted according to the requirement of a user, even zero gap is realized, the double, by locking the copper set screw 22, the front end of the copper set screw 22 is pressed against the external thread on the outer side of the bearing seat 10, thereby locking the locking disc 20 on the bearing seat 10, limiting the double-lead worm 40 in the axial direction, enabling the double-lead worm 40 to be tightly meshed with the worm wheel, when the double-lead worm 40 needs to be adjusted again, the bearing seat 10 can be rotated to be adjusted only by loosening the copper set screw 22, because the front end of the copper set screw 22 is pressed against the external thread on the outer side of the bearing seat 10, a larger static friction force can be formed between the copper set screw 22 and the external thread on the outer side of the bearing seat 10, thereby preventing the double-lead worm 40 from axially moving under the stress state, and simultaneously, because the copper set screw 22 with lower hardness is adopted, the damage of the fastening screw to the external thread of the bearing seat 10 can be avoided.

Furthermore, copper holding screw 22 is the flat head holding screw, and copper holding screw 22 front end is the plane promptly, and the external screw thread of bearing frame 10 is trapezoidal thread, increases the contact surface of copper holding screw 22 and bearing frame 10 external screw thread, avoids adopting triangle-shaped screw thread time bearing frame 10 external screw thread to be damaged by copper holding screw 22.

Example 2

The difference between the present embodiment and the above embodiments is that two sets of end face notches 14 are symmetrically disposed on the outer end portion of the bearing seat 10, and the bearing seat 10 is rotated by an auxiliary tool by inserting the auxiliary tool into the end face notches 14, so as to drive the bearing seat 10 to adjust the position of the bearing seat 10 along the axial direction of the dual-lead worm 40, i.e. to drive the dual-lead worm 40 to perform fine adjustment along the axial direction, thereby adjusting the gap between the dual-lead worm 40 and the worm wheel, and keeping the dual-lead worm 40 and the worm wheel tightly engaged.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.

Claims

1. The utility model provides a two lead worm gear clearance adjustment mechanism which characterized in that: the double-lead worm locking device comprises a bearing seat (10) and a locking disc (20), wherein the locking disc (20) is fixedly connected with a speed reducer shell (30) through a fastener, one end of a double-lead worm (40) is rotatably connected with the bearing seat (10), an internal thread is arranged on the inner side of the locking disc (20), an external thread matched with the internal thread of the locking disc (20) is arranged on the outer side of the bearing seat (10), and the bearing seat (10) is in threaded connection with the locking disc (20);

the locking disc (20) is provided with a plurality of groups of fastening screw holes (21) which are radially communicated with the inner side, copper fastening screws (22) are connected to the fastening screw holes (21) in a threaded manner, and the front ends of the copper fastening screws (22) are pressed on the outer side of the bearing seat (10).

2. The dual lead worm gear lash adjustment mechanism of claim 1, wherein: the copper set screw (22) is a flat-head set screw, and the external thread of the bearing seat (10) is a trapezoidal thread or a rectangular thread or a sawtooth thread.

3. The dual lead worm gear lash adjustment mechanism of claim 1, wherein: the fastening screw holes (21) are symmetrically arranged on the locking disc (20) in pairs.

4. The dual lead worm gear lash adjustment mechanism of claim 1, wherein: and a plurality of groups of adjusting holes (13) are formed in the outer end part of the bearing seat (10).

5. The dual lead worm gear lash adjustment mechanism of claim 1, wherein: and a plurality of groups of end surface notches (14) are arranged at the outer end part of the bearing seat (10).

6. The dual lead worm gear lash adjustment mechanism of claim 1, wherein: the double-lead worm is characterized in that an annular limiting boss (11) is arranged in the bearing seat (10), two groups of tapered roller bearings (12) are symmetrically arranged on two sides of the annular limiting boss (11), and the double-lead worm (40) is rotationally connected with the two groups of tapered roller bearings (12).

7. The dual lead worm gear lash adjustment mechanism of claim 6, wherein: the other side of the speed reducer shell (30) is provided with a guide through hole (31), a ball bearing (32) is arranged in the guide through hole (31) in a sliding mode, and the other end of the double-lead worm (40) is rotatably connected with the ball bearing (32).