JPH06210576A - Bearing member pull-out device for electromagnetic brake - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a bearing member extracting device for an electromagnetic brake, which has good workability and can reliably extract the bearing member without damaging the bearing member. [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 brim contacts the end surfaces of the bearing members 6a and 6b on the center side, and has pressers 8a and 8b that can be inserted from the outer ends of the bearing members 6a and 6b and outer diameters that are smaller than the inner diameters of the pressers 8a and 8b. A pull-out member 10 that can be inserted into the pressers 8a and 8b.
And a bolt 11 and a nut 12 for transmitting the force in the pulling direction to the pressing element.

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 pulling device, as described in, for example, Japanese Patent Application No. 61-141376, a pressing member deformable and insertable from a hollow portion of the bearing member is engaged with the bearing member to push the above-mentioned pressing member. It is known that a contact member that comes into contact with a child and a pull-out member that transmits a force in the pull-out direction of the bearing member to the contact member are forcibly pulled out.

[0003]

However, in such a bearing member withdrawing device, the pressing member for elastically deforming and inserting, for example, a C-ring, has strength enough to transmit a force in the withdrawing direction of the bearing member. Then, a large force is required to pass through the hollow portion of the bearing member while being deformed, and when the length of the bearing member is long, it is difficult to insert the bearing member while maintaining the deformation, and workability is not good.

Further, a cylindrical object having a collar is divided into two,
In another embodiment in which the pressing element is deformably integrated by a metal fitting, since the contact surface between the pressing element and the drawing material is tapered, a force in the drawing direction is applied to pull out the bearing member. In addition to the above, not only the pulling force with respect to the bearing member but also the force for pressing the bearing member in the radial direction is generated to increase the pulling resistance force, so that a larger pulling device is required. In addition, since this pressing force in the radial direction acts on each part of the inner diameter of the bearing member, when applied to a bearing member using a brittle member such as oil-impregnated sintered metal, it may cause local damage to the bearing member. become,
Therefore, there is a problem that it is difficult to pull out. In particular,
This problem was remarkable in the case of a bearing member having a large inner diameter, which increases the pulling force.

An object of the present invention is to provide a bearing member pulling device for an electromagnetic brake, which has good workability when pulling out the bearing member from the fixed core and which can surely pull out without damaging the bearing member. .

[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 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. , 180 in circumferential direction
And a pressing element which is divided into an angle equal to or less than a degree, the collar comes into contact with the end surface of the center side of the bearing member, and which is insertable from the outer end of the bearing member and faces each other, and an outer diameter slightly smaller than the inner diameter of the pressing element. The drawing member has a diameter and can be fitted into the pressing element that is arranged to face each other, and a bolt and a nut that transmit the force in the drawing direction of the bearing member from the drawing material to the pressing element.

[0007]

Since the bearing member extracting device of the present invention is constructed as described above, when the bearing member is extracted, it has a collar 2
After inserting one presser from the outer edge of the bearing member from the collar, hold the collar in contact with the end surface of the bearing member on the center side, and then insert a drawing material inside the presser and press the two pressure members together. Secure the child and the drawn material with bolts and nuts. 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 out. .

[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, FIG. 2 is a sectional view showing a structure of a suction portion of the electromagnetic brake, and FIG. 3 is a pusher shown in FIG. FIG. 4 is a perspective view showing a state before the insertion of the bearing member, and FIG. 4 is a perspective view of the bearing member extracting device of FIG.

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 drawing device for drawing 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 an outer diameter slightly smaller than the inner diameters of the pressers 8a and 8b,
Insert the pullout member 10 that can be fitted into the pressers 8a and 8b,
The bolt 11 and the nut 12 that transmit the pulling force of the bearing member 6a from the pulling member 10 to the pressing elements 8a and 8b are tightened. At this time, the tip of the drawing material 10 is pressed by the pressing element 8a,
8b at the position where it comes out from the tip of the brim of 8b.
By fixing b and the pulling member 10, the pulling force is increased by the pressing element 8.
When acting on a and 8b, it is possible to suppress deformation of the pressing elements 8a and 8b toward the drawing material 10 side, so that all the pulling force is transmitted to the pressing elements 8a and 8b. Here, the pulling member 10 is hydraulically or mechanically pulled down to pull out the bearing member 6 a 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 constructed as described above, it is a cylindrical product having a collar 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.
A pusher divided into a fan shape at an angle of 180 degrees or less is inserted from the outer end of the bearing member and arranged so as to face the end face on the center side of the bearing member so that the flange is slightly smaller than the inner diameter of the pusher. It has a small outer diameter, and is inserted so that the tip of this drawing material comes out from the flange part of the pressing element to the pressing element arranged oppositely, and the pressing element and the drawing material are fixed with bolts and nuts. Since the force in the pulling direction of the bearing member from the material is transmitted to the pressing element, the bearing member can be pulled out without causing local damage to the bearing member.

[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.

4 is a perspective view of the bearing member extracting device of FIG. 1. FIG.

[Explanation of symbols]

 6a, 6b Bearing member 7 Fixed iron core 8a, 8b Presser 9 Through hole 10 Extraction material 11 Bolt 12 Nut

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 pressing member is divided into an angle of 0 degrees or less, and the collar comes into contact with the end surface of the bearing member on the center side and is insertable from the outer end of the bearing member and faces each other, and slightly smaller than the inner diameter of the pressing member. It has an outer diameter and is composed of a drawing material that can be fitted into the pressing element arranged oppositely, and a bolt and a nut for transmitting the force in the drawing direction of the bearing member from the drawing material to the pressing element. Electromagnetic brake bearing member extraction device.