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Electromagnetic brake and passenger conveyor with the electromagnetic brake

A technology for passenger conveying equipment and electromagnetic brakes, which is applied to mechanical equipment, brake actuators, escalators, etc., and can solve problems such as hindering passenger convenience, increasing the distance between electromagnets and armatures, and increasing noise

Active Publication Date: 2015-12-02
HITACHI LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This drag becomes the cause of wear of the brake pads, and further causes the distance between the electromagnet and the armature to increase, and the above chain is repeated
It should be noted that when the distance between the armature and the electromagnet exceeds a certain distance, the magnetic force required for attraction cannot be generated, so that the armature cannot be attracted by the electromagnet, that is, it becomes impossible to release the brake.
[0011] The second problem is that since the distance that the armature is pressed by the pressing spring becomes longer at the start of braking, the moving speed of the armature increases, causing the brake pads to collide at a greater speed, resulting in louder noise
[0013] In addition, in machines using the above-mentioned electromagnetic brakes, such as elevators, escalators, cranes, and machine tools, it is necessary to stop the machines in order to carry out the above-mentioned maintenance and adjustment work. Escalators, if out of service, significantly impede passenger convenience
[0014] In addition, a technology for automatically adjusting the stroke of the armature (plunger) is disclosed in Patent Document 1. Since the technology disclosed in Patent Document 1 is a technology for automatically adjusting the range of movement of the armature in a state where the winding is fixed , so although the second problem above can be solved, there is a problem that the attractive force will gradually weaken as the position of the armature deviates from the winding due to the automatic adjustment of the moving range of the armature

Method used

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  • Electromagnetic brake and passenger conveyor with the electromagnetic brake
  • Electromagnetic brake and passenger conveyor with the electromagnetic brake
  • Electromagnetic brake and passenger conveyor with the electromagnetic brake

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0042] figure 1 This is a cross-sectional view of the electromagnetic brake of the first embodiment, showing the situation when braking is performed in a state where the brake lining is not worn. figure 2 Yes figure 1 Shown is a detailed view of the parts near the rack and hook.

[0043] In the first embodiment, the housing 1 of the electromagnetic brake is a part for mounting the stator of the motor, which is fixed to the base. A bearing 2 is fixed to the housing 1, and a motor shaft 3 as a rotating shaft of the motor to which the rotor of the motor is mounted is rotatably supported by the bearing 2. A spline 4 is processed on the motor shaft 3, and the brake disc 5 as a disc-shaped member is supported by the spline 4 so as to be movable in the axial direction of the motor shaft 3. In addition, a plurality of guide pins 6 are fixed on the circumference of the housing 1 centered on the motor shaft 3. The guide pin 6 fixes the fixed plate 7 and the rack 8 and supports the armatu...

no. 2 example

[0066] Picture 11 This is a cross-sectional view of the second embodiment, showing the situation when braking is performed in a state where the brake linings are not worn. Picture 12 Yes Picture 11 Shown is a detailed view of the vicinity of the rack and the engaging member. Figure 13 From Picture 12 The figure viewed in the A direction. In the second embodiment, the structure of the position holding member is different from the first embodiment. The following description mainly focuses on the different parts from the first embodiment, and the description of overlapping parts is omitted.

[0067] In the second embodiment, the rack 8, the restricting member 18 and the engaging member 20 constitute a position holding member. It should be noted that the position holding member may also be provided with a release spring 19.

[0068] The guide pin 46 is fixed to the housing 1 to support the armature 9 and the housing 50 so as to be movable in the axial direction of the motor shaft...

no. 3 example

[0076] In the third embodiment, various modifications of the first embodiment and the second embodiment will be described.

[0077] Figure 16 It is a detailed diagram of the vicinity of the rack in the third embodiment. As an example of a modified example, in the first embodiment and the second embodiment, for example Figure 16 As shown in the example, it is also possible to provide a plurality of claw portions 16b of the hooks 16 or teeth of the engaging member 20 that are arranged at intervals p′ different from the pitch p of the teeth of the rack 8 and can be displaced independently from each other. 尖20c. Specifically, in the case of the first embodiment, the hooks 16 and the release spring 15 are provided in multiple sets independently of each other, and the spacing of the multiple sets of hooks 16 in the axial direction of the motor shaft 3 is set to be the same as that of the teeth. The tooth pitches of the teeth of the bars 8 are different. In the case of the second emb...

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PUM

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Abstract

In an electromagnetic brake, the position between an armature and an electromagnet can be automatically adjusted even when a brake lining has wear. The electromagnetic brake is provided with a shell for accommodating the electromagnet, a guide pin fixed on the shell of the electromagnetic brake and supporting the shell to be movable in an axis direction of a motor shaft, a limitation pin fixed in the shell and limiting the distance between the electromagnet and the armature in the axis direction of the motor shaft in a predetermined range, and a position holding member for holding the position of the electromagnet in the axis direction of the motor shaft when the brake is released and releasing the holding of the position in braking.

Description

Technical field [0001] The invention relates to an electromagnetic brake and a passenger conveying equipment equipped with the electromagnetic brake. Background technique [0002] Generally, motors used in elevators, escalators, cranes, machine tools, etc. are equipped with electromagnetic brakes for maintaining positions. This electromagnetic brake consists of a brake disc that rotates with the motor shaft, a housing fixed to the base of the motor, an armature supported by the housing so as to move only in the axial direction of the motor, and a pressing spring that presses the armature toward the brake disc. , It is composed of an electromagnet that is fixed to the housing and overcomes the pressing force of the pressing spring to move the armature away from the brake disc, and a brake lining that is arranged between the brake disc and the armature and fixed to either one. [0003] The above-mentioned electromagnetic brake is used to generate braking force when the motor is stop...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B66B23/00F16D69/00F16D65/14F16D121/20
Inventor 堂园美礼
Owner HITACHI LTD