CN215817808U

CN215817808U - Worm mounting structure

Info

Publication number: CN215817808U
Application number: CN202121070772.4U
Authority: CN
Inventors: 郭坤; 唐黎明; 李光海; 许绩彤; 黄光建
Original assignee: GAC Component Co Ltd
Current assignee: GAC Component Co Ltd
Priority date: 2021-05-18
Filing date: 2021-05-18
Publication date: 2022-02-11
Anticipated expiration: 2031-05-18

Abstract

The utility model discloses a worm mounting structure, which comprises a motor shaft and a worm, wherein the motor shaft is provided with a mounting rib and a groove, the outer diameter of the mounting rib is larger than the diameter of an inner hole of the worm, the worm is pressed into the motor shaft, the mounting rib is positioned in the inner hole of the worm, so that the worm is in interference fit with the motor shaft, and the worm is stamped into the groove of the motor shaft to realize the mounting of the worm and the motor.

Description

Worm mounting structure

Technical Field

The utility model relates to a gear actuator, in particular to a worm mounting structure.

Background

At present, the design scheme of the domestic P-gear actuator adopts a design mode that a worm is pressed into a motor shaft in an interference mode and the worm is welded with the motor shaft, the stability of worm press-fitting can be improved by the design mode, but the motor shaft is deformed due to the welding of the worm, the meshing efficiency of a worm gear and the worm is reduced, and the output performance of a product is reduced. To compensate for this problem, the power of the motor needs to be increased, which results in increased cost and severe loss.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a worm mounting structure which does not need welding when a worm is mounted.

One of the purposes of the utility model is realized by adopting the following technical scheme:

the utility model provides a worm mounting structure, includes motor shaft and worm, the motor shaft is equipped with installation muscle and recess, the external diameter of installation muscle is greater than the hole diameter of worm, the worm is impressed the motor shaft, the installation muscle is located in the hole of worm, make the worm with motor shaft interference fit, the worm punching press extremely realize in the recess of motor shaft the worm with the installation of motor.

Further, the depth of the groove is 0.3mm-0.7 mm.

Furthermore, the number of the grooves is four, and the four grooves respectively correspond to two ends of the worm.

Further, the outer diameter of the mounting rib is 0.07mm-0.15mm larger than the inner hole diameter of the worm.

Furthermore, the quantity of installation muscle is a plurality of, a plurality of installation muscle evenly encircle in motor shaft forms the annular knurl.

Further, the worm mounting structure further comprises a gear box body and an output gear, the output gear and the motor shaft are mounted in the gear box body, and the worm is meshed with the output gear.

Further, worm mounting structure still includes adjusting screw, adjusting screw rotate install in the gear box body, adjusting screw is relative the gear box body rotates and can contradict the motor shaft is in order to adjust the pretightning force of motor shaft.

Further, the worm mounting structure further comprises a gasket, and the gasket is mounted between the adjusting screw and the motor shaft.

Further, the worm mounting structure further comprises a ball bearing, and the ball bearing is located between the motor shaft and the gear box body, so that the motor shaft is rotatably mounted in the gear box body.

Further, the worm mounting structure further comprises an end cover bearing and a motor end cover, the motor end cover is mounted on the gear box body, and the end cover bearing is mounted between the motor end cover and the motor shaft.

Compared with the prior art, the worm mounting structure enables the worm to be in interference fit with the motor shaft through the mounting ribs, the worm is stamped into the groove of the motor shaft to realize the mounting of the worm and the motor shaft, and welding is not needed, so that the motor shaft cannot be deformed due to welding.

Drawings

FIG. 1 is a cross-sectional view of the worm mounting structure of the present invention;

FIG. 2 is a partial exploded view of the worm mounting structure of FIG. 1;

FIG. 3 is a partial structural cross-sectional view of the worm mounting structure of FIG. 2;

fig. 4 is an enlarged view of the worm mounting structure a of fig. 3.

In the figure: 10. a gear housing; 20. a motor shaft; 21. a groove; 22. installing ribs; 30. a worm; 40. an output gear; 50. a ball bearing; 60. a gasket; 70. adjusting screws; 80. an end cap bearing; 90. and a motor end cover.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present, secured by intervening elements. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly disposed on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 to 4 show a worm mounting structure of the present invention, which includes a gear housing 10, a motor shaft 20, a worm 30, an output gear 40, a ball bearing 50, a spacer 60, an adjusting screw 70, an end cap bearing 80, and a motor end cap 90.

The motor shaft 20 is provided with a groove 21 (also referred to in the industry as a flat position) and mounting ribs 22. The number of the grooves 21 is plural, and the number of the mounting ribs 22 is plural. The plurality of mounting ribs 22 are uniformly circumferentially provided on the motor shaft 20 and knurled on the motor shaft 20. The grooves 21 are respectively positioned at both ends of the mounting rib 22 corresponding to both ends of the worm shaft 30. The diameter of the motor shaft 20 is 6mm (+0.01/-0), and the ribbing height is 6.07mm (+0.03/+ 0). The depth of the groove 21 is 0.3mm to 0.7 mm. Preferably, the depth of the groove 21 is 0.5 mm.

The worm 30 is provided with an inner bore having a bore diameter of 6mm (-0.02/-0.04).

When assembling the worm mounting structure, the worm 30 is press-fitted to the motor shaft 20 and then press-fitted into the ball bearing 50, and in order to ensure that the ball bearing 50 does not fail, a slow press-in manner by an oil press is adopted. The motor shaft 20 is installed in the gear housing 10 through the motor end cover 90 in a clearance fit manner, and the position degree of the ball bearing 50 and the end cover bearing 80 needs to be ensured so as to prevent the motor shaft 20 from being seriously abraded and the efficiency from being reduced. The top of the motor shaft 20 is pushed into the gasket 60, and the pretightening force of the motor shaft 20 is adjusted through the adjusting screw 70 to realize normal power output; the output gear 40 is installed in the gear box body 10, and the worm 30 and the output gear 40 realize power output through meshing transmission.

The worm mounting structure of the utility model enables the worm 30 to be in interference fit with the motor shaft 20 through the mounting rib 22, the worm 30 is punched into the groove 21 of the motor shaft 20 to realize the mounting of the worm 30 and the motor shaft 20, and welding is not needed, so the deformation of the motor shaft 20 caused by welding is avoided.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, variations and modifications can be made without departing from the spirit of the utility model, and all equivalent modifications and changes can be made to the above embodiments according to the essential technology of the utility model, which falls into the protection scope of the utility model.

Claims

1. The utility model provides a worm mounting structure, includes motor shaft and worm, its characterized in that: the motor shaft is equipped with installation muscle and recess, the external diameter of installation muscle is greater than the hole diameter of worm, the worm is impressed the motor shaft, the installation muscle is located in the hole of worm, make the worm with motor shaft interference fit, the worm punching press extremely realize in the recess of motor shaft the worm with the installation of motor.

2. The worm mounting structure as set forth in claim 1, wherein: the depth of the groove is 0.3mm-0.7 mm.

3. The worm mounting structure as set forth in claim 1, wherein: the number of the grooves is four, and the four grooves respectively correspond to the two ends of the worm.

4. The worm mounting structure as set forth in claim 1, wherein: the outer diameter of the mounting rib is 0.07mm-0.15mm larger than the inner hole diameter of the worm.

5. The worm mounting structure as set forth in claim 1, wherein: the number of installation muscle is a plurality of, and is a plurality of installation muscle evenly encircle in motor shaft forms the annular knurl.

6. The worm mounting structure as set forth in claim 1, wherein: the worm mounting structure further comprises a gear box body and an output gear, the output gear and the motor shaft are mounted in the gear box body, and the worm is meshed with the output gear.

7. The worm mounting structure as set forth in claim 6, wherein: the worm mounting structure further comprises an adjusting screw, the adjusting screw is rotatably mounted in the gear box body, and the adjusting screw is opposite to the gear box body and can abut against the motor shaft to adjust the pre-tightening force of the motor shaft.

8. The worm mounting structure as set forth in claim 7, wherein: the worm mounting structure further comprises a gasket, and the gasket is mounted between the adjusting screw and the motor shaft.

9. The worm mounting structure as set forth in claim 6, wherein: the worm mounting structure further comprises a ball bearing, and the ball bearing is located between the motor shaft and the gear box body to enable the motor shaft to be rotatably mounted in the gear box body.

10. The worm mounting structure as set forth in claim 6, wherein: the worm mounting structure further comprises an end cover bearing and a motor end cover, the motor end cover is mounted on the gear box body, and the end cover bearing is mounted between the motor end cover and the motor shaft.