JPH08216047A - Bearing replacement jig - Google Patents

Abstract

PURPOSE: To facilitate the operation of drawing out or inserting a bearing by providing a guide shaft perpendicular to and integral with a base, and fitting around the shaft a pedestal carrying a rotor, a drawing jig working on the bearing only, and a pushing jig for drawing the bearing out of the rotor. CONSTITUTION: In an operation for drawing out a bearing 52 mounted in a sheave 50, first a pedestal 5 is placed on a base 2 with its small-diameter hole 6A fitted around a guide shaft 3. Next, the guide shaft 3 is fitted into the bearing bore portion of the sheave 50, the pedestal is thereby fitted around the guide shaft 3, and the side face of the boss portion 51 of the sheave 50 is placed on the annular upper surface of the pedestal 5. Then a drawing jig 7 is fitted around the guide shaft 3 and placed on the side face of the bearing 52 of the sheave 50. Thereafter, a pushing jig 9 is mounted in place by fitting its center hole 10 around the guide shaft 3, and the bearing 52 is drawn out of the sheave 50 by pushing down the pushing jig 9 by means of a press and is supported inside the pedestal 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing mounted on a rotating body, for example, a bearing mounted on a sheave used as a guide for a wire rod in manufacturing a winding.
The present invention relates to a bearing replacement jig used when removing a bearing from a sheave or mounting a bearing on the sheave.

[0002]

2. Description of the Related Art Usually, a bearing for mounting a rotary body on a rotary shaft is often fixed to the rotary body by a snap ring or a bearing nut. However, for example, a sheave used as a guide for a wire rod in manufacturing a winding wire reduces the sheave weight, and further, since the pitch between the wire rods fed in parallel is narrow, the sheave thickness is made as thin as possible. Because of the necessity, it is conventionally made of a light metal such as aluminum, and the bearing is fixed to the sheave by crimping.

In a sheave having such a structure, when the bearing is damaged, the bearing is replaced by using a press machine. A jig used when replacing the bearing is shown in FIGS.

First, referring to FIG. 7, a case where the bearing mounted on the sheave is pulled out from the sheave will be described.

The bearing replacement jig 100 has a stepped hole 102 having a large diameter portion 102A and a small diameter portion 102B at the center.
It has a base 101 in which the base is formed, and a cylindrical men-shaped boss 103 that can be mounted on the large diameter portion 102A of the stepped hole 102 of the base 101.

In the bearing removing work, as shown in FIG. 7, the men-type boss 103 is mounted on the base 101, and the bearing 5 is mounted on the annular upper surface 103A of the men-type boss 103.
The side surface of the boss portion 51 of the sheave 50 to which the 2 is attached is placed while centering the men-shaped boss 103 and the sheave 50. The inner diameter of the men-shaped boss 103 is larger than the outer diameter of the bearing 52.

Next, the on-type boss 10 having the cylindrical portion 105 whose outer diameter is made slightly smaller than the outer diameter of the bearing 52.
Only the bearing 52 is pressed by the lower end surface 105A of No. 4 and pressed downward. By this, the bearing 5
2 is pulled out from the sheave 50. Further, in order to facilitate center alignment between the on-type boss 104 and the bearing 52, a protrusion 106 that fits into the center hole of the bearing 52 is formed on the lower end surface 105A of the on-type boss 104.

A case where the bearing 52 is mounted on the sheave 50 will be described with reference to FIG. At the time of this bearing insertion work, the men-type boss 103 shown in FIG. 7 can be used as the men-type boss 107 mounted on the large diameter portion 102A of the base 101, but as shown in FIG. The upper end outer peripheral portion 107A may be configured to have a reduced diameter so as to support the side surface of the boss portion of the sheave 50. The men-shaped boss 107 and the sheave 50 are center-aligned, then the center hole 50A of the sheave 50 is center-aligned, and the bearing 52 is placed at the upper end position of the center hole 50A.

Next, the on-type boss 10 having the cylindrical portion 109 whose outer diameter is made slightly larger than the outer diameter of the bearing 52.
The bearing 52 is pressed by the lower end surface 108A of 8 and pressed downward. This allows the bearing 52
Is pushed into the center hole 50A of the sheave 50.

The bearing 5 mounted on the sheave 50
When caulking 2 to the sheave 50, as described in FIG. 9, the side surface of the boss portion 51 of the sheave 50 is placed on the upper end claw portion of the caulking jig 110 mounted on the large diameter portion 102A of the base 101, Place while aligning the centers. At this time, in order to facilitate the center alignment of the caulking jig 110 and the sheave 50, a protrusion 111 that fits into the center hole of the bearing 52 is formed on the upper end surface of the caulking jig 110.

Next, the boss 51 of the sheave 50 and the bearing 52 are pressed by the lower end surface 108A of the on-type boss 108 used during the bearing inserting operation described above, and pressed downward. As a result, the sheave boss portion 51 is crimped to the bearing 52, and the bearing 52 is fixed to the sheave 50.

[0012]

However, the bearing 5 using the above-mentioned conventional bearing replacement jig 100 is used.
The replacement work of No. 2 had many problems.

That is, in the bearing removing operation shown in FIG. 7, since the sheave 50 is simply placed on the men-type boss 103, it is essential to center the sheave 50 and the men-type boss 103 as described above. Further, the bearing 52 needs to be pulled out while keeping horizontal with respect to the sheave 50. However, since the on-type boss 104 and the men-type boss 103 are separated from each other, the on-type boss 104 is always connected to the men-type boss. It was difficult to operate while maintaining a fixed positional relationship with respect to 103, and in some cases, the bearing 52 slipped off with respect to the sheave 50.

Also, in the bearing inserting operation shown in FIG. 8, the bearing 52 may be mounted in an inclined state with respect to the sheave 50 in some cases, as in the case of the bearing removing operation.

Further, during the caulking work shown in FIG. 9, the bearing 52 is provided with the protruding portion 111 of the caulking jig 110.
Is fixed by fitting it in the center hole of the bearing 52, but the sheave 50 is merely placed on the upper end claw portion of the crimping jig 110, and the sheave 50 is fixed by the on-type boss 108. When the boss 51 and the bearing 52 were pressed and pressed downward and caulking was performed, the relationship between the sheave 50 and the bearing 52 was deviated, and as a result, the bearing 52 was inclined and fixed with respect to the sheave 50. .
Further, according to such a conventional caulking operation, a dimensional error in machining of the upper end claw portion of the caulking jig 110, an inclination due to wear, or a slight variation in material and hardness of the sheave 50 influences the sheave 50. However, the bearing 52 may be inclined and fixed.

Therefore, an object of the present invention is to remove the bearing mounted on the rotating body, to insert the bearing into the rotating body, and to perform the caulking work between the rotating body and the bearing. There is no need to specially perform centering between the tool components, and during these operations, the rotor, bearing, and jig components are always kept horizontal, and the inclination between the rotor and the bearing is maintained. It is an object of the present invention to provide a bearing replacement jig with a reduced number of parts, which can eliminate the above-mentioned problems and can perform the above-mentioned operations easily.

[0017]

The above object can be achieved by a bearing replacement jig according to the present invention. In summary, the present invention has a guide shaft having an outer diameter into which an inner diameter portion of a bearing mounted on a rotating body can be inserted and having a male screw portion at an upper end, which is vertically and integrally provided, A stepped hole formed of a small diameter portion slidably fitted to the guide shaft and a large diameter portion having a hole diameter slightly larger than the outer diameter of the bearing is formed, and the rotating body inserted into the guide shaft is formed. A pedestal for carrying, a center hole that slidably fits on the guide shaft is bored, and a pulling jig that acts only on a bearing mounted on a rotating body inserted through the guide shaft; A bearing replacement jig having a center hole formed to fit with a guide shaft, acting only on the pulling jig, and having a pushing jig for pulling out the bearing from the rotating body. This bearing replacement jig is preferably used for bearing removal work.

According to another aspect of the present invention, in order to suitably carry out the bearing insertion work, a guide shaft having an outer diameter into which the inner diameter portion of the bearing can be inserted and a male screw portion at the upper end is provided. , A stepped hole formed of a base provided integrally vertically and a small diameter portion slidably fitted to the guide shaft and a large diameter portion having a hole diameter slightly larger than the outer diameter of the bearing, A pedestal for carrying the rotating body inserted through the guide shaft and a central hole that fits into the guide shaft are formed and act only on the bearing inserted through the guide shaft. There is provided a bearing replacement jig including: a pushing jig for pushing in.

Further, according to the aspect of the present invention, for caulking work, a guide shaft having an outer diameter into which the inner diameter portion of the bearing mounted on the rotating body can be inserted and having a male screw portion at the upper end is provided. , With a stepped hole consisting of a vertically integrated base, a small diameter part slidably fitted to the guide shaft and a large diameter part having a hole diameter slightly larger than the outer diameter of the bearing. A pedestal for supporting a rotating body and a bearing that is formed and inserted into the guide shaft, and a center hole that is slidably fitted in the guide shaft, and the rotating body that is inserted into the guide shaft. And a cross-shaped washer that acts only on the bearing mounted on the guide shaft, and a center hole that slidably fits into the guide shaft. The upper end of the center hole is screwed into the male screw portion of the guide shaft. A female screw is formed and the lower end is inserted through the guide shaft. In addition, a washer fixing jig that acts only on the cross-shaped washer and a central hole that fits into the washer fixing jig are formed, and the caulking is performed only on the rotating body that is inserted through the guide shaft to perform caulking. A jig for replacing a bearing is provided, which comprises:

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A bearing replacement jig according to the present invention will be described below in more detail with reference to the drawings.

1 to 6 show an embodiment of a bearing replacement jig of the present invention and a bearing replacement operation using this jig. In this embodiment, the rotating body on which the bearing is mounted is a sheave having a groove on the outer circumference used for guiding the wire rod, but the present invention is not limited to this.

First, with reference to FIGS. 1 and 2, the operation of removing the bearing 52 mounted on the sheave 50 will be described.

In this embodiment, the bearing replacement jig 1
Has a base 2 integrally provided with a guide shaft 3 vertically and in the center. A male screw portion 4 is formed on the upper end of the guide shaft 3. The operation of the male screw portion 4 will be described later. The bearing replacement jig 1 further includes a small diameter portion 6A slidably fitted to the guide shaft 3 and a bearing 52.
A pedestal 5 formed around a stepped hole 6 consisting of a large-diameter portion 6B having a hole diameter slightly larger than the outer diameter, and a central hole 8 slidably fitted to the guide shaft 3. It has a punching jig 7 provided and a pushing jig 9 in which a central hole 10 that fits into the guide shaft 3 is formed. In the present embodiment, the center hole 10 of the pushing jig 9 is a blind hole, but it may be a through hole.

In the operation of removing the bearing, first, the pedestal 5 is placed on the base 2 by fitting the stepped hole small diameter portion 6A to the guide shaft 3. At this time,
The stepped hole large diameter portion 6B of the pedestal 5 is positioned above. Next, the sheave 50 in which the bearing 52 is mounted
Is inserted into the guide shaft 3 by fitting the bearing inner diameter portion to the guide shaft 3, and the side surface of the boss portion 51 of the sheave 50 is placed on the annular upper surface of the pedestal 5. The inner diameter of the annular upper surface of the pedestal 5, that is, the inner diameter of the large-diameter portion 6B is slightly larger than the outer diameter of the bearing 52, as described above. Subsequently, the extraction jig 7 is inserted into the guide shaft 3 and arranged on the side surface of the bearing 52 of the sheave 50. The outer diameter of the extraction jig 7 is slightly smaller than the outer diameter of the bearing 52. Finally, the pushing jig 9 has its center hole 1
It is mounted by fitting 0 into the guide shaft 3, and the lower surface thereof contacts the upper surface of the extraction jig 7.

According to the above construction, the pedestal 5, the sheave 50 with bearings, the removing jig 7 and the pushing jig 9 are fitted and mounted on the guide shaft 3 with a small clearance, so that Center alignment is done automatically and no special center alignment work is required.

Next, the pushing jig 9 is pushed down by a pressing machine (not shown). As a result, the bearing 52 is pulled out of the sheave 50 and falls into the recess formed by the large diameter portion 6B of the pedestal 5 and the guide shaft 3. According to the present invention, since the pushing jig 9 and the pulling jig 7 move downward along the guide shaft 3 in parallel with the bearing 52, the bearing 52 tilts with respect to the sheave 50. It will not come out in the open state.

A case where the bearing 52 is mounted on the sheave 50 will be described with reference to FIG. At the time of this bearing insertion work, the pedestal 5 inserted through the guide shaft 3 of the base 2 and mounted is turned upside down from the bearing insertion work.
That is, the stepped hole large diameter portion 6B of the pedestal 5 is arranged so as to be located below. Further, the extraction jig 7 used during the bearing insertion work is not used. That is, the pedestal 5, the sheave 50 to which the bearing 52 is not attached, and the bearing 52 are attached to the guide shaft 3 in this order so as to be fitted to the guide shaft 3, and finally, the pushing jig 9 is attached.
Is mounted by fitting the central hole 10 to the guide shaft 3, and the lower surface thereof abuts the side surface of the bearing 52.

Next, the pushing jig 9 is pushed down by a pressing machine (not shown). As a result, the bearing 52 is pushed into the sheave 50 and mounted. At this time, the pushing jig 9 and the bearing 52 move downward along the guide shaft 3 in parallel with the sheave 50, and the sheave 50 receives the bearing 52 as the bearing 52 is pushed. It is possible to move on the table 5 and automatically perform center alignment with the bearing 52.
2 is not mounted in a state of being inclined with respect to the sheave 50.

The swaging operation of the sheave 50 with the bearing 52 mounted is shown in FIG. To perform the crimping work, first, as in the case of each work described above, first, the cradle 5
However, it is placed on the base 2 by fitting the stepped hole small diameter portion 6A to the guide shaft 3. At this time, the stepped hole large diameter portion 6B of the pedestal 5 is positioned below. Next, the sheave 50 with the bearing 52 attached is
The inner diameter of the bearing is inserted into the guide shaft 3 to be inserted, and the side surface of the boss 51 of the sheave 50 is placed on the annular upper surface of the pedestal 5.

Next, the cross-shaped washer 11 having the shape shown in FIG. 6 is inserted into the guide shaft 3 and arranged on the side surfaces of the sheave 50 and the bearing 52. Subsequently, the washer fixing jig 12 is inserted into the guide shaft 3. A female screw 13 is formed on the upper end portion of the washer fixing jig 12, and is screwed into a male screw portion 4 formed on the upper end of the guide shaft 3. By rotating the washer fixing jig 12, the washer fixing jig 12 is moved further downward, and its lower end surface abuts on the upper surface of the inner peripheral portion 11A of the cross-shaped washer 11,
Further, by rotating the washer fixing jig 12, the sheave 50 and the bearing 52 are firmly fixed between the receiving base 5 and the cross-shaped washer 11.

In the crimping work, the crimping jig 14 is used instead of the pushing jig 9. The crimping jig 14 has the same structure as the pushing jig 9, but the inner diameter of the center hole 15 is set to fit into the washer fixing jig 12.
Further, at the lower end of the caulking jig 14, the hardened nail portion 1
6 is formed. The claw portion 16 is formed so that its tip is located in the space portion 11B (FIG. 6) of the cross-shaped washer 11 and is located in the boss portion 51 of the sheave 50 adjacent to the outer peripheral portion of the bearing 52.

Next, the caulking jig 14 is pressed downward by a pressing machine (not shown), whereby the sheave boss portion 51 is caulked to the bearing 52 and the bearing 52 is fixed to the sheave 50. At this time, as described above, according to the present invention, the sheave 50 is placed in close contact with the horizontal surface of the cradle 5 as described above,
Further, the bearing 52 is held vertically by the guide shaft 3 installed perpendicularly to the horizontal plane of the receiving table 5, and further, the sheave 50 and the bearing 52 are separated from the receiving table 5 by the washer fixing jig 12. Since the bearing 52 is firmly fixed to the character-shaped washer 11, the bearing 52 is not displaced during the crimping work, and as a result, the bearing 52 is not inclined and fixed with respect to the sheave 50.

The crimping work is usually performed on both sides of the sheave. Therefore, the caulking work is performed on the opposite surface of the sheave in the same procedure as described above.

In the above embodiments, the rotating body is described as a sheave used as a guide for the wire rod during manufacturing of the winding, but the present invention can be applied to various other rotating bodies equipped with bearings.

[0035]

As described above, the bearing replacement jig of the present invention is integrally provided with the guide shaft perpendicular to the base, and acts only on the pedestal for bearing the rotating body and the bearing on this shaft. A structure for performing a bearing removing operation or a bearing inserting operation by inserting a pulling jig, a pushing jig for pulling out the bearing from the rotating body, or a pushing jig for pushing the bearing into the rotating body. Therefore, the bearing, the rotating body, and other members can be automatically centered, and the bearing will not be pulled out or mounted in a state inclined with respect to the sheave. . Further, the bearing replacement jig of the present invention includes a cross-shaped washer that acts only on the bearing mounted on the rotating body that is inserted through the guide shaft, and a washer fixing jig that acts only on the cross-shaped washer that is inserted through the guide shaft. Since it is configured to have a tool and a caulking jig that is engaged with the washer fixing jig and acts only on the rotating body that is inserted through the guide shaft to perform the caulking, the washer fixing jig is used during the caulking work. The tool secures the sheave and bearing between the pedestal and the cruciform washer, thus preventing the bearing from slipping and thus the bearing from tilting relative to the sheave. Further, the bearing replacement jig of the present invention has parts that can be used in a plurality of operations, and therefore, the number of parts can be reduced as compared with the conventional bearing replacement jig. There is.

[Brief description of drawings]

1 is an embodiment of a bearing replacement jig of the present invention,
It is sectional drawing explaining a bearing removal work.

FIG. 2 is a cross-sectional view showing exploded components of the bearing replacement jig of FIG.

FIG. 3 is a cross-sectional view illustrating a bearing insertion operation in another embodiment of the bearing replacement jig of the present invention.

FIG. 4 is a cross-sectional view illustrating a caulking operation in another embodiment of the bearing replacement jig of the present invention.

FIG. 5 is a partial sectional front view of a caulking jig.

FIG. 6 is a plan view of a cross-shaped washer.

FIG. 7 is a cross-sectional view illustrating a bearing removing operation using a conventional bearing replacement jig.

FIG. 8 is a cross-sectional view illustrating a bearing insertion operation using a conventional bearing replacement jig.

FIG. 9 is a cross-sectional view illustrating a caulking operation using a conventional bearing replacement jig.

[Explanation of symbols]

 1 Bearing replacement jig 2 Base 3 Guide shaft 4 Male screw part 5 Cradle 7 Pulling jig 9 Pushing jig 11 Tens washer 12 Washer fixing jig 13 Female screw portion 14 Caulking jig 16 Claw portion 50 Sheave ( (Rotating body) 51 Sheave boss 52 Bearing

Claims (3)

[Claims] 1. A base in which a guide shaft having an outer diameter into which an inner diameter portion of a bearing mounted on a rotating body can be inserted and having a male screw portion at an upper end is vertically and integrally provided, and the guide shaft. A stepped hole formed of a small-diameter portion slidably fitted with and a large-diameter portion having a hole diameter slightly larger than the outer diameter of the bearing, for carrying the rotating body inserted into the guide shaft. A cradle, a center hole slidably fitted to the guide shaft, and a removal jig that acts only on the bearing mounted on the rotating body inserted in the guide shaft, and the guide shaft. A bearing replacement jig, which has a center hole to be fitted therein, and which has only a pushing jig that acts only on the pulling jig and pulls the bearing from the rotating body. 2. A base having a guide shaft having an outer diameter into which an inner diameter portion of the bearing can be inserted and having a male screw portion at an upper end, which is vertically and integrally formed, and slidably fitted to the guide shaft. A stepped hole formed of a small diameter part to be fitted and a large diameter part having a hole diameter slightly larger than the outer diameter of the bearing is formed, and a pedestal for carrying the rotating body inserted into the guide shaft, and the guide A center hole for fitting the shaft is formed, which acts only on the bearing inserted through the guide shaft, and has a pushing jig for pushing the bearing into the rotating body. jig. 3. A base in which a guide shaft having an outer diameter into which an inner diameter portion of a bearing mounted on a rotating body can be inserted and having a male screw portion at an upper end is vertically and integrally provided, and the guide shaft. A rotating body and a bearing formed around a stepped hole having a small diameter portion slidably fitted with a large diameter portion having a hole diameter slightly larger than the outer diameter of the bearing and inserted into the guide shaft. A pedestal for carrying, a center hole slidably fitted to the guide shaft is bored, and a cross-shaped washer that acts only on the bearing mounted on the rotating body inserted into the guide shaft, A center hole is slidably fitted in the guide shaft, a female screw threaded to the male screw portion of the guide shaft is formed at the upper end of the center hole, and the lower end is inserted into the guide shaft. Fixed washer that acts only on the cross-shaped washer A jig and a caulking jig for forming a central hole that fits into the washer fixing jig and acting only on the rotating body inserted through the guide shaft to perform caulking. Bearing replacement jig.