JPS6140470Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a method for removing bearings, gears, screws, etc. (hereinafter simply referred to as the attached body) attached to drive shafts, etc. (hereinafter simply referred to as the shaft) and other attached bodies. Relating to extraction device.

Regarding the relationship between the shaft and the mounting body such as a bearing, the mounting body mounted on the shaft or other mounted body wears out after being used for a certain period of time and needs to be replaced. To replace this, you will need to remove the old attachment and install the new one.

However, since the shaft and the mounting body such as a bearing are firmly fixed by a key or other means, there is a disadvantage that the mounting body cannot be easily removed. Therefore, in the past, the shaft was forcibly pulled out using a vise, etc.

After heating the fixed part with a gas burner, etc., pull it out.

We are taking measures such as:

However, method (2) may damage the shaft itself, and method (2) heats not only the inner diameter of the mounted body such as the bearing, but also the shaft and the mounted body, making it difficult to remove it. .

Therefore, the present inventor first devised Utility Application No. 55-95144, ``Heat Puller''. This device is attached to the shaft and uses electromagnetic induction to heat only the inner diameter of the attached body such as a bearing, so the inner diameter of the attached body expands and it is difficult to remove it from the shaft. It is easy to perform and has been well received.

However, even in this case, it is necessary to take a step of heating the inner diameter part of the attached body to a certain temperature and then pulling out the attached body using a heat puller, and there is a risk of heating more than necessary.

The present invention addresses the above-mentioned problems and aims to provide a pull-out device that can pull out the mounted body from the shaft while heating the shaft and the mounted body such as a bearing. be.

The present invention achieves the above-mentioned object with an apparatus that is integrally equipped with two mechanisms: a heating mechanism that heats an attached object to which an attached object such as a bearing for pulling out is attached, and a mechanism for pulling out the attached object. It was achieved.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

A specific embodiment has the configuration shown in FIG.

The heating mechanism 1 is an electromagnetic induction ring 8 having a hole 6 large enough to be mounted on a shaft 5 to which a mounting body 3 is fixed, and a coil 7 wound around the hole 6. The mechanism uses the shaft 5 as a core, supplies a current to the coil 7, and uses the current to heat the inner diameter part 4 of the attached body 3 by electromagnetic induction, thereby expanding the inner diameter part 4. (See FIG. 1b) Further, the pull-out mechanism 2 for pulling out the attached body 3 from the shaft includes a central shaft 9, a clamping member 10 for clamping the attached body 3, and a clamping width adjusting member 11. The central shaft 9 and the clamping member 10 are screwed together, and the clamping member 10 and the clamping adjustment member 11 are engaged.

The lower end of the central shaft 9 has a pivot point 12 with the shaft 5;
A turning nut 13 is provided at the upper end. The clamping member 10 has a large diameter portion 14, a small diameter portion 15, and a leg portion 16. The small diameter portion 15 is a hollow cylinder connected above the large diameter portion 14, and the leg portion 16 (in the drawing, two
The book is pivoted on the large diameter portion 14 so that the legs can be opened freely, and a hook 17 is formed at the end.

The clamping width adjusting member 11 has a trapezoidal shape with a hollow cylinder at its tip, and is threadedly engaged with the small diameter portion 15 of the clamping member 10. The side members 18 and the bottom member 19 allow the clamping width of the legs 16 of the clamping member 10 to be adjusted. In addition, the member 1
1 may have any structure as long as it can adjust the pawl 17, that is, always bias it in the closing direction, and may have a structure as shown in FIG. 2, for example.

The heating mechanism 1 is fitted onto the central shaft 9 and disposed so as to be movable in the axial direction, and is movable from the solid line position to the chain line position in the figure.

The heating mechanism 1 is attached to the bottom member 19 of the clamping width adjusting member 11 of the pulling mechanism 2 so as to be located below the bottom member 19.

Next, to explain the operation of removing the attached body 3 such as a bearing attached to the shaft 5, first, the clamping width adjusting member 11 in the extraction mechanism 2 of the extraction device shown in FIG. 3 so that the hook 16 can grip it.

Next, the pivot point 12 of the central shaft 9 is brought into contact with the shaft 5, and the heating mechanism 1 is mounted on the shaft 5. And nail 1
Adjust the clamping width adjusting member 11 by moving it up and down so that the clamping member 7 does not completely grip the mounting body 3 and loosen (see FIG. 1a).

Next, the electromagnetic induction ring 8 is lowered, and the shaft 5
When the inner diameter part 4 of the attached body 3 is heated by applying electricity, and the central shaft 9 is rotated parallel to this, the attached body 3 whose inner diameter part 4 has expanded due to the heating is moved to the shaft 5. The fixed state with which it is fixed is released (see FIG. 5), and it is pulled out from the shaft 5.

This invention has a configuration that combines a heating mechanism and a pulling mechanism, so processes that were conventionally performed separately can be performed at the same time, reducing operational complexity, and since pulling is done while heating, there is no waste. It has the advantage of not causing heating and expansion.

[Brief explanation of the drawing]

FIG. 1a is a side view, FIG. 1b is a sectional view of the heating mechanism in FIG. 1a, and FIG. 2 is a side view of another embodiment. 1: heating mechanism, 2: withdrawal mechanism, 3: attached body, 4: inner diameter part of attached body, 5: shaft, 9: central axis,
10: Clamping member, 11: Clamping width adjustment member.

Claims (1)

[Scope of utility model registration request] A large diameter part 14 is screwed onto the central shaft 9 so that it can move in the axial direction, and a plurality of legs 16 with hooks are attached to the large diameter part 14 so that the legs can be freely opened toward the distal end of the central shaft 9. A bearing mounted on a shaft, characterized in that the shaft is supported so as to be always biased in the closing direction, and an electromagnetic induction ring 8 is disposed on the central shaft 9 so as to be movable in the axial direction. etc. and other extraction devices.