JPH0727085Y2 - Bearing puller - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing puller for removing a bearing from a shaft.

As a conventional bearing puller, for example, there is one disclosed in Japanese Utility Model Publication No. 55-10057, which is proposed by the applicant. This bearing puller is arranged at the center of the base body, which is arranged to face a bearing mounted on the shaft, and is movable along the axial direction of the shaft arranged to face the base body. Screw shaft that abuts against the shaft and exerts a pressing force in the axial direction on the shaft, and the base end is pin-connected to the base body, and the distal end has a groove or shoulder for fitting the snap ring on the outer peripheral surface of the bearing. It is composed of two arms with hooking claws that can be hooked on the part. When using this bearing puller to remove the bear ring from the shaft, first insert the hooking claw at the tip of the arm into, for example, the groove for fitting the snap ring of the bearing, and then screw the screw shaft against the base to screw it. The tip of the shaft is brought into contact with the end of the shaft on which the bearing is hooked. As a result, the pressing force of the screw shaft is applied to the shaft, and the bearing is pulled out from the shaft by the hooking claw.

However, according to the bearing puller having such a structure, the base end portion of the arm is only pin-coupled to the base body. Therefore, when a pressing force is applied to the shaft by the screw shaft, the arm is a pin having the base end portion. There was a problem that the joint was opened around the center. That is,
In each arm, the hooking claw at the tip end opens in the direction in which it disengages from the groove for fitting the snap ring, which sometimes causes a problem that the bearing cannot be pulled out.

Therefore, the applicant has conventionally proposed an improved bearing puller shown in FIG. In the figure, 1 is an axis, 2
Is a bearing, and 3 is a groove for fitting the snap ring of the bearing 2. The bearing puller 4 has a base 6 which is arranged opposite to the bearing 2 and includes a support piece 5 which is arranged in a direction orthogonal to the axial direction of the shaft 1. A screw shaft 7 is screwed onto the center of the base body 6, and the screw shaft 7 is shown by an arrow A along the axial direction of the shaft 1.
It is screwed in the direction. Pin holes 8 are formed at appropriate intervals in the support piece 5 extending left and right around the screw shaft 7. An arm 10 having a hooking claw 9 at its tip is supported by each supporting piece 5. The arm 10 is provided with a pin hole at the base end, and the hooking claw 9 of the arm 10 is used for the bearing 2
In the state of being engaged with the snap ring fitting groove 3, the pin hole of the arm 10 and the pin hole 8 of the support piece 5 are made to correspond to each other,
The pin 11 is inserted into each pin hole. Then, the base end of each arm 10 is pin-coupled to the support piece 5. In this state, the tip ends of the pair of arms 10 are further connected by the connecting piece 12. Connecting piece 12
Is arranged in parallel with the support piece 5 of the base body 6, and has bolt insertion holes 13 at both ends at appropriate intervals. Each bolt insertion hole 13
Among them, the bolt 14 is inserted in the bolt insertion hole 13 at a position corresponding to the arm 10 arranged in parallel with the screw shaft 7.
Is inserted, and the bolt 14 is screwed into a bolt hole (not shown) formed on the tip side of the arm 10. In this way, the screw shaft 7 is screw-operated in the direction of the arrow B in a state where the distal ends of the respective arms 10 are coupled to both ends of the coupling piece 12, and the distal end of the shaft 7 is formed in the center hole 15 at the end of the shaft 1. The sharp edges 16 thus formed are abutted against each other, and a pressing force is applied to the shaft 1. Then, the hook 2 causes the bearing 2 to be pulled in the direction of the arrow C (axial direction), and the bearing 2 can be separated from the shaft 1. At this time, the tip of each arm 10 is connected to the connecting piece 12
Unlike the bearing puller before the improvement, the hooks 9 do not drop out from the snap ring fitting groove 3 of the bearing 2 and the bearing 2 can be reliably removed.

[0005]

However, even in such an improved bearing puller 4, if the axial direction of the shaft 1 and the axial direction of the screw shaft 7 do not correspond to each other, the pressing force of the screw shaft 7 against the shaft 1 is applied. Each arm 10 has a pin coupling part (point P) when
May tilt in the twisting direction (direction of arrow D) around
There was a case where the hooking claw 9 fell off the groove 3 for fitting the snap ring. Further, since the pin holes 8 formed in the support piece 5 and the bolt insertion holes 13 formed in the connection piece 12 are only provided at appropriate intervals in the direction orthogonal to the axial direction, bearings of all diameters can be obtained. Corresponding to, the screw shaft 7 and each arm 10 arranged along the axial direction.
It is difficult to dispose them in parallel. If the arm 10 and the screw shaft 7 are not in parallel in the bearing puller 4 of this type, the tip of the arm 10 will shake during the pressing work, and the hooking claw 9 will move out of the groove 3. It was supposed to come off easily.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to enable reliable engagement of the bearing at the tip of the arm and to reliably disengage the bearing from the shaft. It is a thing.

[0007]

In order to achieve the above-mentioned object, the present invention is arranged at the tip of each arm so as to face a hooking claw, is supported by the arm so as to be movable in the radial direction with respect to the shaft, and Engaged in the ring-shaped hole and abutted / engaged with the bearing outer ring inner wall in the ring-shaped hole,
An engaging claw capable of holding the outer ring portion of the bearing is provided together with the hooking claw arranged to face each other.

[0008]

According to the present invention, the engaging claw is arranged so as to face the hooking claw disposed at the tip of each arm, and the engaging claw is supported by the arm so as to be movable in the radial direction with respect to the shaft. Therefore, the movement can be adjusted so that the engaging claw is engaged with the ring-shaped hole on the end surface of the bearing. After the engaging claws are engaged in the ring-shaped holes, the movement of the engaging claws is adjusted so that the engaging claws come into contact with and engage with the inner wall of the outer ring of the bearing. It is possible to hold the outer ring part. In this way, the bearing is securely engaged and held at the tip of each arm, and if the pressing body exerts a pressing force on the shaft in this state, the bearing can be reliably disengaged from the shaft.

[0009]

1 to 3 show a bearing puller according to an embodiment of the present invention. In the drawing, 1 is a shaft, 2 is a bearing, and 3 is a groove for fitting a snap ring of the bearing 2 (see FIG. 1).
And FIG. 3). The bearing puller 20 includes a screw shaft 21 that is disposed so as to face the bearing 2 and that is arranged in the center along the axial direction (X direction) of the shaft 1. The screw shaft 21 is screwed into a screw hole formed in the center of the base 22, and is movable with respect to the base 22 in the axial direction of the shaft 1. The base 22 has a pair of left and right support pieces 23 extending in a direction (Y direction) orthogonal to the axial direction (X direction) of the shaft 1. A slit 24 is formed in each of the support pieces 23 along the Y direction, and a step portion 25 is formed at the outer end of each slit 24. The base end portion of the arm 26 is inserted into the slit 24 of each support piece 23 as shown by an arrow E in FIG. Arm 2
A pin hole 27 is formed at the base end of the pin 6.
A pin 28 can be inserted into the connector as shown in FIG.
The arm 26 in which the pin 28 is inserted into the pin hole 27 moves along the slit 24 of the support piece 23 along the screw shaft 2
It is slidable in the radial direction (Y direction) with respect to 1. That is, the arm 26 is slid in a state in which the pin 28 slides on the upper surface of the support piece 23, and the sliding on the outer side in the radial direction (Y direction) is restricted by the step portion 25. A pair of arms 26 arranged outside the screw shaft 21 has a claw attachment 29 at the tip thereof.
Is attached. The claw attachment 29 is attached to the tip of each arm 26 with a bolt 30, and at a lower position of the claw attachment 29, the claw attachment 29 is inserted into the snap ring fitting groove 3 of the bearing 2 and can be hooked on the bearing 2. 31 is formed. Further, the pawl attachment 29 is provided with a support hole 32 that is provided in the radial direction (Y direction) with respect to the screw shaft 21 (see FIG. 3). A base end portion of an engaging claw 33 arranged to face the hooking claw 31 is inserted into the support hole 32. A screw 34 is provided at the base end portion of the engaging claw 33, a spacer 35 is inserted outside the claw attachment 31 into the screw 34 inserted through the support hole 32, and a nut 36 is provided outside the spacer 35.
Is screwed on. The engaging claw 33 attached to the claw attachment 31 is moved and adjusted in the radial direction (Y direction) with respect to the shaft 1 by tightening and loosening the nut 36 (see FIG. 1).

When the bearing 2 mounted on the shaft 1 is disengaged from the shaft 1 by the bearing puller 20 thus formed, first, the tip end of the screw shaft 21 is made to abut against the end of the shaft 1. , Screw shaft 21
The axis line direction of the axis 1 corresponds to the axis line direction of the axis 1. Subsequently, the base end of the arm 26 formed by inserting the pin 28 into the pin hole 27 is inserted into the slit 24 as shown by the arrow E, and the base end of the arm 26 is supported by the support piece 23. Then, the base end of the engaging claw 33 is inserted into the support hole 32 of the claw attachment 29 attached to the tip of the arm 26. The engagement claw 33 is engaged with a ring-shaped hole 37 formed in the end surface of the bearing 2 as shown in FIG.
The inner wall 38 of the inner side of the bearing is abutted. That is, the engaging claw 33 moves with respect to the claw attachment 29 along the support hole 32 in the arrow Y direction, and
7, and abuts and engages with the bearing outer ring inner wall 38. In this way, the engaging claws 33 make the bearing outer ring inner wall 3
8 is engaged, then the hooking claw 31 is inserted into the snap ring fitting groove 3 of the bearing 2, and in this state, the nut 36 screwed to the screw 34 at the base end of the engaging claw 33 is tightened. I will. As a result, as shown in FIG. 1, the bearing 2 is provided by the hooking claw 31 and the engaging claw 33 which are arranged to face each other.
The outer ring part of the vehicle will be held. In this state, a handle or impact wrench is attached to the base end of the screw shaft 21, and the screw shaft 21 is rotated to apply a pressing force in the arrow F direction to the shaft 1 from the tip of the screw shaft 21. And the hook 31
The bearing 2 held between the engaging claw 33 and the engaging claw 33 is pulled out from the shaft 1 along the axial direction (X direction).

Next, the operation of the above embodiment will be described. According to the bearing puller 20 according to the above embodiment, the arm 2
6, the engaging claw 33 is attached in a state of facing the hooking claw 31 in the claw attachment 29 attached to the front end of the bearing 6, and the end surface of the bearing 2 is adjusted while moving and adjusting the engaging claw 33 in the arrow Y direction. Can be engaged in the ring-shaped hole 37 of. Further, the engaging claw 33 engaged in the ring-shaped hole 37 abuts and engages with the inner wall 38 of the bearing outer ring portion, and together with the hooking claw 31 arranged to face the bearing 2,
It is possible to hold the outer ring part of the. Therefore, the bearing 2 is securely engaged and held at the tip of each arm 26, and the bearing 2 can be reliably disengaged from the shaft 1. Further, according to the bearing puller 20 according to the above-described embodiment, since the base end portion of the arm 26 can slide in the arrow Y direction along the slit 24 of the support piece 23, the arm 26 can be moved parallel to the axial direction of the shaft 1. It is possible to set the arm 2 during the pulling work.
It is possible to smoothly disengage the bearing 2 from the shaft 1 without applying a force in a twisting direction to the bearing 6. Furthermore, the claw attachment 29 attached to the tip of the arm 26 can be adapted to the shape and size of the bearing 2 and can be exchanged to accommodate various types of pulling out of the bearing 2. For example, the claw attachment 39 shown in FIG. 3 is attached to the tip of the arm 26. The claw attachment 39 includes a hook claw 41 that can be hooked on a shoulder 40 of the bearing 2.
1 is provided with an engaging claw 33 having the same configuration as that of the above embodiment. According to the claw attachment 39, even if there is no snap ring fitting groove on the outer peripheral surface of the bearing 2, the bearing can be separated from the shaft.

Although the screw shaft 21 is used as the pressing body in the above embodiment,
The structure of the pressing body is not limited to such a structure, and for example, a cylinder device, a slide hammer, or the like may be used. The point is that a mechanism for exerting a pressing force in the axial direction on the shaft may be provided. . Further, in the above embodiment, the arm 26 is provided along the slit 24 of the support piece 23.
Although it has a structure that slidably supports the base end of
As in the prior art, the structure may be such that the base end portion of the arm is pin-coupled to the pin holes arranged at appropriate intervals along the longitudinal direction of the support piece.

[0013]

As described above, according to the present invention, it is possible to securely engage the bearing at the tip of the arm and to reliably disengage the bearing from the shaft.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a bearing is separated from a shaft by a bearing puller according to an embodiment of the present invention.

2 is an overall perspective view of the bearing puller shown in FIG. 1. FIG.

FIG. 3 is a cross-sectional view showing an engagement state of engagement claws with a bearing.

FIG. 4 is a sectional view showing a state in which a bearing is separated from a shaft by a conventional bearing puller.

[Explanation of symbols]

 1 axis 2 bearing 3 groove for snap ring fitting 4 bearing puller 5 support piece 6 base 7 screw shaft 8 pin hole 9 hooking claw 10 arm 11 pin 12 connecting piece 13 bolt insertion hole 14 bolt 15 center hole 16 sharp edge 20 bearing Puller 21 Screw shaft (pressing body) 22 Base 23 Supporting piece 24 Slit 25 Step 26 Arm 27 Pin hole 28 Pin 29 Claw attachment 30 Bolt 31 Hooking claw 32 Support hole 33 Engaging claw 34 Screw 35 Spacer 36 Nut 37 Ring-shaped hole 38 Inner wall 39 Claw attachment 40 Shoulder 41 Claw

Claims (3)

[Scope of utility model registration request] 1. A base body arranged to face a bearing mounted on the shaft, and a shaft arranged at the center of the base body and movable along the axial direction of the shaft arranged to face the base body. A pressing member that abuts against the shaft portion and exerts a pressing force in the axial direction on the shaft, and at least two or more members are supported on the outer side of the base body, and a groove or a shoulder portion for fitting the snap ring on the outer peripheral surface of the bearing is provided at the tip end portion. An arm having a hooking claw that can be hooked onto the shaft, and a bearing puller that allows the bearing to be detached from the shaft by the hooking claw by the action of a pressing force on the shaft of the pressing body. Is supported by the arm so as to be movable in the radial direction with respect to the shaft, is engaged with the ring-shaped hole in the end face of the bearing, and is abutted and engaged with the inner wall of the bearing outer ring portion in the ring-shaped hole, Bearing puller, characterized in that the outer ring of the bearing together with the latching pawls being arranged with a engaging claw to enable pinching. 2. The base body is provided with a plurality of support pieces extending in a radial direction with respect to the pressing body arranged along the axial direction of the shaft, and the base end portion of each arm is attached to the support piece. The bearing puller according to claim 1, wherein the bearing puller is supported so as to be slidable in a radial direction with respect to the pressing body. 3. The bearing puller according to claim 1, wherein the pressing body is constituted by a screw shaft screwed to the base body, arranged along the axial direction of the shaft, and screw-operated.