JP2002052481A - Assisting tool for detaching fitted member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an assisting tool facilitating the detachment of a member fitted to a rotary shaft, in particular a fitting member with a little projecting portion such as a bearing. SOLUTION: This assisting tool for detaching the fitted member is constituted of two half-ring members having a step difference concentrically formed in the inside face and a projecting part formed in the outside face and is characterized in surrounding the circumference of the fitted member so as to clamp and fasten it.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing a member fitted to a rotating shaft or the like, for example, a bearing, particularly a fitting member having a small number of protrusions such as a bearing inner ring, by using a removing tool. The present invention relates to an invention of an auxiliary tool that can be attached around a fitting member in order to facilitate an operation of removing a joining member.

[0002]

2. Description of the Related Art It is necessary to remove a fitting member from a rotating shaft in order to perform periodic inspection or replacement of a fitting member of a rotating shaft such as a bearing. For example, for bearings,
It is relatively easy to remove the outer ring portion with a removal tool because of the projections, but it has not been easy to remove the innermost inner ring portion. In other words, since the height of the inner ring is small, even if the claw of the removal tool is hooked on the inner ring of the bearing, it slips when a force is applied, so that it cannot be removed as desired or the shaft is damaged by the claw.
As a method of facilitating removal of the bearing from the shaft by using a removal tool, for example, in Japanese Utility Model Laid-Open No. 6-61470, a male screw attached to the bearing is screwed with a locking portion, and the bearing is removed. Although there is a tool that catches the nail of the tool, this method is suitable for a fitting member having a size enough to attach a male screw, and a fitting such as a bearing inner ring which is small and has few protrusions. It cannot be applied when removing members. Further, in Japanese Utility Model Laid-Open No. 4-57378, a tool for removing a fitting member having no projection is described. However, according to this, an inner cylinder and an outer cylinder having claws are provided in the removal tool, and these inner cylinder and outer cylinder are provided. After covering over the fitting member to remove the cylinder,
Operate by further covering the cylindrical member. This makes it difficult for the nails to come off during work. However, this tool has many troubles such as preparing cylindrical members having different diameters.

[0003]

As described above, there has been no removal aid having a simple structure in which a fitting member, such as a bearing inner ring, which has few projections and is difficult to remove, can be easily removed. Therefore, an object of the present invention is to provide a detachment assisting tool that can easily remove a fitting member and has a simple structure.

[0004]

SUMMARY OF THE INVENTION The present invention comprises two half ring-shaped members having a circumferential step on the inner surface and a projection on the outer surface. Surround,
It is an auxiliary tool for removing a fitting member, which is configured to be pinched and tightened.

[0005] The fitting member refers to a bearing of a bearing attached to the shaft. The auxiliary device for removal is an auxiliary device that is attached around the fitting member to facilitate the removal operation when operating the removal device described in Japanese Utility Model Application Laid-Open No. 6-61470 and Japanese Patent Application Laid-Open No. 6-79642. Refers to equipment.

[0006] The two half ring-shaped members are arranged so as to be in a ring shape by being sandwiched from around the fitting member. A step is provided in the circumferential direction on the inner surface of the half-ring-shaped member that is in contact with the fitting member, and the step prevents the fitting member from falling out of the auxiliary tool. Further, a projection is provided on the outer surface of the half ring-shaped member, and a hook of a removal tool is engaged with the projection to facilitate pulling out.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The auxiliary tool of the present invention is made of metal, ceramic or the like, but may be anything as long as it has strength. The half-ring-shaped member is not particularly limited as long as it has a diameter and a width capable of sandwiching a fitting member such as a bearing.

In order to clamp the half-ring member around the fitting member and tighten it, for example, there is the following method. However, the method is not limited to the following method as long as it can be firmly tightened. A projection having a screw hole is provided at both ends of one half-ring member, and a projection having a through-hole is provided at both ends of the other half-ring member, and a screw is provided from the side of the half-ring member having the through-hole. And tightening the two half-ring members by screwing into the screw holes of the half-ring members facing each other. A method in which projections having screw holes are provided at both ends of a half ring-shaped member, and the two half ring-shaped members are screwed together with screws and tightened. A method in which projections having through holes are provided at both ends of a half-ring member, and bolts are inserted into the through holes to fasten the two half-ring members with nuts. A method in which one end of the two half-ring members is rotatably connected, and the other end is fastened with the same screw as in (1) to (3).

The step provided on the inner surface of the half-ring member in contact with the fitting member is provided so that a step is formed in the circumferential direction. The half-ring member is attached around the fitting member and pulled out with a removal tool. Sometimes, the half-ring-shaped member is attached around the fitting member so that the fitting member does not come off from the auxiliary tool, and the stepped portion is supported from below the fitting member. The height of the step needs to be at least such that the fitting member is supported from below and does not come off.

The projections provided on the outer surface of the half-ring-shaped member are for engaging the nails of the removal tool with the projections to facilitate pulling out, and are not particularly limited as long as they have the same function. Not something. The projection may be provided anywhere on the outer peripheral surface, and may be one or more. Also,
It may be provided in an arc shape along the outer peripheral surface.

The use of this auxiliary unit is as follows.
A pair of half ring-shaped members are attached around a fitting member fitted to the shaft, and tightened by a tightening means. Thereafter, the hook of an appropriate removal tool is hooked on a projection provided on the outer peripheral surface of the half ring-shaped member, and the fitting member is pulled out from the shaft.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will now be described with reference to FIGS.
It will be described based on. FIG. 1 shows a sectional view of an embodiment of the assisting device of the present invention. Reference numeral 1 denotes a pair of half-ring-shaped member main bodies, and a projection 3 is provided at a substantially central portion on an outer surface 8 thereof.
The stepped portion 2 is provided on the inner peripheral surface 7 in the circumferential direction. Further, projections were provided at both ends of the half-ring member, a through hole 5 was provided on one half-ring member side, and a screw hole 4 was provided on the other half-ring member side. FIG. 3 is a diagram showing the use. A fitting member 10 is fitted on the shaft 9, and a pair of half ring-shaped members 1 are sandwiched and fastened to this fitting member. After that, the hook of the removal tool is hooked on the protrusion 3 to pull out the fitting member.

[0013]

The auxiliary tool according to the present invention has a simple structure. By using the auxiliary tool, it is possible to easily pull out a fitting member such as a bearing which has few projections and is difficult to remove from a shaft or the like. Becomes possible.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of the assisting device of the present invention.

FIG. 2 is a view of one semi-ring shaped member as viewed from the inner peripheral surface side.

FIG. 3 is a cross-sectional view when the auxiliary tool is used.

[Explanation of symbols]

 1. Half ring-shaped member 2. Step portion (to make a curved surface) Protrusion 4. Screw holes 5. Through hole 6. Screw 7. 7. Inner surface (curved) Outside surface 9. Axis 10. Mating member

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Nobuo Izumi 300, Mukonohonmachi, Takaoka-shi, Toyama F-term (reference) in Nippon Soda Co., Ltd. Takaoka Plant 3C031 DD06

Claims (2)

[Claims] An inner surface is provided with a step in the circumferential direction and two half-ring-shaped members having a projection on an outer surface are arranged so as to surround the fitting member and to clamp it. An assisting tool for removing a fitting member. 2. A fastening means for two half-ring shaped members,
3. The auxiliary member for removing a fitting member according to claim 1, wherein a screw is screwed into a screw hole provided at an end of the half ring-shaped member. 3. The fitting member according to claim 1, wherein the fitting member is an inner ring of a bearing.