JPH0839450A - Electromagnetic brake bearing member extraction device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a bearing member withdrawing device for an electromagnetic brake, which is capable of reliably withdrawing the bearing member and has good workability. [Structure] A cylindrical object having a flange having an outer diameter larger than the inner diameters of the bearing members 6a and 6b and having an outer diameter smaller than the inner diameters of the bearing members 6a and 6b, and divided into a fan shape at an angle of 180 degrees or less, The pressing members 8a and 8b, which are brought into contact with the end faces of the bearing members 6a and 6b on the center side and which can be inserted from the outer ends of the bearing members 6a and 6b, and the pressing members 8 which are smaller than the inner diameter of the bearing member 8
It is composed of a collar portion having an outer diameter larger than the inner diameters of a and 8b, and a pulling member 10 having an outer diameter slightly smaller than the inner diameters of the pressing elements 8a and 8b and capable of being fitted into the pressing elements 8a and 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bearing member pulling device for an electromagnetic brake used when pulling out a bearing member fitted to a fixed core for sliding a movable shaft.

[0002]

2. Description of the Related Art As a conventional bearing member withdrawing device, as described in Japanese Patent Application No. 5-6821, for example, a pressing member that is insertable from the outer end of the bearing member and faces the bearing member is contacted with the bearing member. It is known that the pusher is fitted into the inner diameter of the pusher, is fixed to the pusher with a bolt and a nut, and is withdrawing forcefully by a pulling member that transmits a force in the pulling direction of the bearing member.

[0003]

However, in such a bearing member drawing device, when the inner diameter of the bearing member is small, the outer diameter of the drawing member is inevitably small, and the pressing element and the drawing member are fixed accordingly. Since the outer diameter of the bolt is also thin, when a force in the pulling direction is applied to the pulling material, the bolt is broken and the bearing member cannot be pulled out.

Further, in assembling the bearing member drawing device,
Insert the pusher into the bearing member, insert the pull-out member into the pusher, and insert the bolts that secure the pusher and pull-out member.Make sure that both holes are aligned, and then insert the bolts and secure with the tool. The workability was not good.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a bearing member pulling device for an electromagnetic brake, which is capable of reliably pulling out the bearing member when pulling out the bearing member from the fixed core, and has good workability.

[0006]

In order to achieve the above object, the present invention provides a large diameter portion formed at both ends of a fixed core through hole with an inner diameter smaller than the diameter of the central portion of the through hole. In a bearing member pulling device for an electromagnetic brake that pulls out each fitted bearing member, a tubular object having a flange with an outer diameter larger than the inner diameter of the bearing member and an outer diameter slightly smaller than the inner diameter of the bearing member. , Fan-shaped in the circumferential direction 18
It is divided into an angle of 0 degree or less, and the collar comes into contact with the end surface of the bearing member on the central side and is inserted into the outer end of the upper bearing member so as to be opposed to the pressure element, and the pressure element is fitted into the inner diameter of the pressure element. , A pull-out member having a brim portion that comes into contact with one end of the pressing member.

[0007]

Since the bearing member withdrawing device for the electromagnetic brake of the present invention is constructed as described above, when the bearing member is withdrawn, two pushers having a flange are sequentially inserted from the outer end of the bearing member to the flange portion. After that, the flange is brought into contact with and held by the end surface of the bearing member on the center side, and then a pullout member having a flange inside the presser is fitted from the bearing member side at the other end to bring the flange into contact with the presser. With this, by pulling the drawing material in the direction in which the contact between the bearing member and the pressing element is maintained, all the drawing force of the drawing material is transmitted to the bearing member via the brim of the pressing element, and the bearing member can be drawn. .

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a bearing member extracting device for an electromagnetic brake according to the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a bearing member extracting device for an electromagnetic brake according to the present invention, and FIG. 2 is a sectional view showing a structure of a suction portion of the electromagnetic brake.

In FIG. 2, a movable iron core 4 is fixed to a movable shaft 3 by a nut 5, and a fixed iron core 7 is provided so as to face the movable iron core 4, and the fixed iron core 7 has a through hole at its central portion. 9 is formed. Bearing members 6a and 6b are fitted in large diameter portions at both axial ends of the through hole 9, and the movable shaft 3 is guided by the bearing members to move up and down. An electromagnetic coil 2 is arranged on the outer periphery of the movable iron core 4 and the fixed iron core 7, and the movable iron core 4 is attracted or repelled by energizing the electromagnetic coil 2, and the arm 1 is operated via the movable shaft 3. Has been done.

FIG. 1 shows the fixed iron core 7 of FIG. 2 in an enlarged manner. Both ends of the through hole 9 have an inner diameter larger than that of the central portion of the through hole. Bearing members 6a and 6b having an inner diameter smaller than the inner diameter are fitted.

Next, a pulling device for pulling out the bearing members 6a and 6b from the fixed iron core 7 will be described with reference to FIGS. 1, 3 and 4.

Now, the fixed iron core 7 is placed on an arbitrary table. From the outer end of the lower bearing member 6a of the fixed iron core 7 toward the center of the hollow portion of the bearing member, a cylindrical object having a brim as a whole is divided into a fan shape at an angle of 180 degrees or less. The two pressers 8a and 8b are sequentially inserted to bring the collar portion into contact with the bearing member and hold it. In that state, it has a flange portion having an outer diameter smaller than the inner diameter of the bearing member and larger than the inner diameters of the pressure elements 8a and 8b, and an outer diameter slightly smaller than the inner diameters of the pressure elements 8a and 8b, and is fitted into the pressure elements 8a and 8b. A possible extraction material 10 is inserted into the pressing elements 8a and 8b, and the brim portion of the extraction material 10 is brought into contact with the pressing elements 8a and 8b.
Here, the pulling member 10 is hydraulically or mechanically pulled down to pull out the bearing member 6a from the fixed iron core 7.

As for the bearing member 6b, the fixed iron core 7 can be turned over and pulled out by the same procedure.

[0015]

EFFECTS OF THE INVENTION Since the present invention is configured as described above, it is a tubular product having a flange having an outer diameter larger than the inner diameter of the bearing member and having an outer diameter slightly smaller than the inner diameter of the bearing member.
The pressing member is divided into a fan shape at an angle of 180 degrees or less in the circumferential direction, the flange comes into contact with the end surface of the bearing member on the center side, and the pressing member is insertable from the outer end of the bearing member and faces each other. The bearing member pulling device is constituted by a pulling material which is fitted into the inner diameter and has a collar portion which comes into contact with one end of the pressing element, and the force in the pulling direction of the bearing member from the pulling material is directly transmitted to the pressing element. The bearing member can be pulled out with good workability and without damage.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a bearing member extracting device for an electromagnetic brake of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a suction unit of an electromagnetic brake.

FIG. 3 is a perspective view showing a state before the pressing element of FIG. 1 is inserted.

FIG. 4 is a perspective view of a bearing member extracting device of the electromagnetic brake of FIG.

[Explanation of symbols]

 6a, 6b Bearing member 7 Fixed iron core 8a, 8b Presser 9 Through hole 10 Extraction material

Claims (1)

[Claims] 1. A bearing member pulling device for an electromagnetic brake, which pulls out a bearing member having an inner diameter smaller than the diameter of the central portion of the through hole, which is fitted in large diameter portions formed at both ends of the fixed core through hole. In a cylindrical shape having a flange with an outer diameter larger than the inner diameter of the bearing member, and an outer diameter slightly smaller than the inner diameter of the bearing member.
The pressure member is divided into an angle of 80 degrees or less, the collar comes into contact with the end face of the bearing member on the center side, and the pressure member is insertable from the outer end of the upper bearing member and faces each other. A bearing member withdrawing device for an electromagnetic brake, comprising a withdrawing member having a collar portion that abuts on one end of the pressing element.