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US-12623324-B2 - Dismounting device for worm or gear on motor shaft

US12623324B2US 12623324 B2US12623324 B2US 12623324B2US-12623324-B2

Abstract

A dismounting device for a worm or gear on a drive shaft includes a main housing provided with a dismounting cavity including first and second ends oppositely arranged. The first end is provided with a slot for inserting the drive shaft and the second end is provided with a dismounting assembly including an outer sleeve and an inner sleeve mounted inside the outer sleeve. The outer sleeve extends into the dismounting cavity through the second end and one end of the outer sleeve is provided with a first positioning hole being inserted by one end of the drive shaft. One end of the inner sleeve which is inserted into the outer sleeve is provided with a second positioning hole coaxially arranged with the first positioning hole. A thimble is mounted in the second positioning hole and runs through the first positioning hole and configured to abut the drive shaft.

Inventors

  • Jianke Ma

Assignees

  • Jianke Ma

Dates

Publication Date
20260512
Application Date
20230904

Claims (8)

  1. 1 . A dismounting device for a worm or gear on a driveshaft of a motor, the dismounting device comprising a main housing, wherein the main housing is provided with a dismounting cavity for a dismounting operation, and the dismounting cavity comprises a first end and a second end that are oppositely arranged; the first end is provided with a spacer detachably mounted to the first end and a slot formed in the spacer, the slot configured to receive the drive shaft while the worm or gear is positioned inside the dismounting cavity and a main body of the motor is positioned outside the dismounting cavity; the second end is provided with a dismounting assembly, wherein the dismounting assembly comprises an inner sleeve and an outer sleeve, the outer sleeve is threadingly mounted to the second end of the dismounting cavity and extends into the dismounting cavity through the second end, and one end of the outer sleeve is provided with a first positioning hole configured to be inserted by an end of the drive shaft; and the inner sleeve is mounted inside the outer sleeve, and one end that is of the inner sleeve and that is inserted into the outer sleeve is provided with a second positioning hole, wherein the second positioning hole and the first positioning hole are coaxially arranged, and a thimble is mounted in the second positioning hole and runs through the first positioning hole and configured to abut against the end of the drive shaft when the inner sleeve is pressed downward, the thimble is pressed by the inner sleeve to move downward, and the drive shaft is configured to be pressed by the thimble to move downward without moving the worm or gear that is clamped inside the dismounted cavity between the outer sleeve and the slot, thereby separating the worm or gear from the drive shaft.
  2. 2 . The dismounting device according to claim 1 , wherein a port of the slot is provided with rounded structures.
  3. 3 . The dismounting device according to claim 1 , wherein the first end of the dismounting cavity is symmetrically provided with sliding grooves configured to mount the spacer, and both sides of the spacer are slidably inserted into the sliding grooves.
  4. 4 . The dismounting device according to claim 1 , wherein a side surface of the main housing is provided with a limiting hole being communicated with a sliding groove, and a side surface of the spacer is provided with a limiting groove corresponding to the limiting hole.
  5. 5 . The dismounting device according to claim 1 , wherein a nut is mounted to one end that is of the outer sleeve and that is positioned outside the dismounting cavity.
  6. 6 . The dismounting device according to claim 1 , wherein the inner sleeve is threadingly mounted inside the outer sleeve.
  7. 7 . The dismounting device according to claim 1 , wherein one end that is of the inner sleeve and that is positioned outside the outer sleeve is radially provided with a through hole.
  8. 8 . The dismounting device according to claim 1 , wherein a main body of the main housing is provided as a cylindrical structure.

Description

TECHNICAL FIELD The present utility model relates to the technical field of dismounting and mounting, and particularly to a dismounting device for a worm or gear on a motor shaft. BACKGROUND In the transmission process of an existing motor, a worm or gear is usually mounted on a drive shaft of the motor for power transmission, and the worm or gear is usually fixed on the drive shaft through mechanical tight fitting and violent stamping. For a micro motor, the worm or gear is difficult to be dismounted due to a small structural size. The dismounting methods for a worm or gear of a micro motor on the market are too simple and rough. Many users adopt violent knocking for dismounting, which easily damages the motor. Some auxiliary dismounting devices that are relatively rough are employed, though the force-bearing thimbles cannot fit all the motor products of different lengths because the force-bearing thimbles are all in a fixed form. Meanwhile, when dismounting, a thimble and a drive shaft of a to-be-dismounted motor are aligned basically by hand feeling to make them be on the same horizontal line, but in the actual operation, slightly uneven stress will crush the thimble, damage the motor and injure the hands. SUMMARY A primary objective of the present utility model is to provide a dismounting device for a worm or gear on a motor shaft, which aims to solve the problems that the existing dismounting device is inconvenient to use, poor in versatility and prone to damaging the motor and the thimble. In order to achieve the above objective, the present utility model provides a dismounting device for a worm or gear on a motor shaft, wherein the worm or gear is mounted on a drive shaft of a motor, and the dismounting device comprises a main housing, wherein the main housing is provided with a dismounting cavity for a dismounting operation, and the dismounting cavity comprises a first end and a second end that are oppositely arranged; the first end is provided with a slot for inserting the drive shaft, the worm or gear is positioned inside the dismounting cavity, and a main body of the motor is positioned outside the dismounting cavity;the second end is provided with a dismounting assembly, wherein the dismounting assembly comprises an inner sleeve and an outer sleeve, the outer sleeve extends into the dismounting cavity through the second end, and one end of the outer sleeve is provided with a first positioning hole being docked with one end of the drive shaft; andthe inner sleeve is mounted inside the outer sleeve, and one end that is of the inner sleeve and that is inserted into the outer sleeve is provided with a second positioning hole, wherein the second positioning hole and the first positioning hole are coaxially arranged, and a thimble used to run through the first positioning hole to be docked with the drive shaft is mounted in the second positioning hole. Optionally, a spacer is detachably mounted to the first end of the dismounting cavity, and the slot is formed in the spacer. Optionally, a port of the slot is provided with rounded structures. Optionally, the first end of the dismounting cavity is symmetrically provided with sliding grooves for mounting the spacer, and both sides of the spacer are slidably inserted into the sliding grooves. Optionally, a side surface of the main housing is provided with a limiting hole being communicated with the sliding groove, and a side surface of the spacer is provided with a limiting groove corresponding to the limiting hole. Optionally, the outer sleeve is threadingly mounted to the second end of the dismounting cavity. Optionally, a nut is mounted to one end that is of the outer sleeve and that is positioned outside the dismounting cavity. Optionally, the inner sleeve is threadingly mounted inside the outer sleeve. Optionally, one end that is of the inner sleeve and that is positioned outside the outer sleeve is radially provided with a through hole. Optionally, a main body of the main housing is provided as a cylindrical structure. The present utility model has the following beneficial effects: the structure of the existing dismounting device for a worm or gear on a motor drive shaft is improved, and through a structure that adopts an inner sleeve and an outer sleeve and combines a spacer, the motor can be quickly positioned, and the drive shaft of the motor and the thimble can be coaxially arranged, thereby ensuring the concentricity therebetween, such that in the dismounting process, the misalignment is avoided, the motor is protected from damage, and both hands of the user can be effectively protected, and therefore the safety of the dismounting process is ensured. BRIEF DESCRIPTION OF DRAWINGS To more clearly illustrate the technical solutions in the embodiments of the present utility model or in the prior art, the drawings required to be used in the description of the embodiments or the prior art are briefly introduced below. It is obvious that the drawings