JPS5962732A - Electomagnetic brake - Google Patents

Abstract

PURPOSE:To prevent howling upon braking, in a spline slidable type electromagnetic brake, by fitting vibration damping materials in holes formed in the end face of a core body so that the brake may be resiliently coupled to the end wall of a motor. CONSTITUTION:Vibration damping materials 20 are fitted in several holes formed in the attaching surface 16a of a core body 16, opposing a motor 2, and are slightly projected at their front ends from the attaching surface of the core body 16 by a distance delta, so that they are yielded within a range of delta when the brake is attached to the motor 2, while attaching bolts 3 are tightened. Upon braking frictional vibration between a brake disc 6 and fritction pads 5 is transmitted to the core body 16 through guide pins 7, and is absorbed by the vibration damping materials 20 having a damping effect between the core body 16 and the motor 2, thereby, the generation of howling may be prevented. The vibration damping material 20 are selected to those having a different damper effect or a different projected distance delta, in accordance with the kind of vibration, or the number of the vibration damping materials 20 is changed in accordance with the kind of vibration.

Description

[Detailed Description of the Invention] This light can be integrally attached to an electric motor or the like. There is also a note on the squeal prevention device U in electromagnetic brakes.

As shown in FIG. 1, this type of electromagnetic brake has a main shaft 17 extending from both ends of an electric motor 1 and a driven fJI at one end.
While the UQ is connected, an electric (support) brake is arranged so as to surround the other end.

Electric (11 brake is a core body 1G that houses the electromagnetic coil)
It is composed of a brake disc 6, and a pair of friction bands 6 arranged on both sides of the brake disc 6, and the core body 1G or the electric motor 2
It is designed to be connected to the end wall of the housing with mounting bolts 3.

As shown in FIG. 2, the core body 16 supports an electromagnetic coil 12 inside, and when the power cord 15 is energized, it exerts an electromagnetic anti-optical force on the back plate 4 of the friction pad 5.
This is mounted on the guide pin 7 and moved to press the friction pad 5 against the brake disc 6. At the same time, the brake disc 6 is moved and pressed against the friction pad 5 on the opposite side to generate braking force. It has become.

The core body 1G has a screw hole 1 loosely inserted into the main @17 in the center.
3, and is provided with a plurality of holes 3a on the outer circumferential side, and is fixed to the end wall of the electric motor 1flt2 by holding the holes 3 inserted through the holes 3a.

11 The moving disc 6 is integrally equipped with a boss portion 6a,
As shown in FIG. 3, the hub 10 is fitted into the square hole 14 provided in the boss portion 6a. A main shaft 17 of the electric motor is fitted into a shaft hole 9 having a keyway 8 provided in the hub 10, and is rotated together with the main shaft 17.

The above-mentioned electromagnetic brake is small overall (and has the feature of easy R configuration), but when braking, it often causes so-called brake squeal (brake squeal) due to frictional vibrations between the friction pad 5 and the brake disc 6. noise).

Conventionally, in order to prevent such squealing, friction pads 5
Countermeasures such as using cast iron material for the back metal 4 supporting the metal plate have been proposed, but this is not preferable in that the cost 1- is larger than that of a plate punched by a press.
Furthermore, since the 1f frictional vibration varies depending on the usage conditions of the electric motor, a sufficient effect may not always be obtained.

An object of the present invention is to reduce frictional vibrations during braking as described above by installing a vibration isolating material between the core body and the electric motor, which can be easily replaced depending on the usage conditions of the electric motor. The purpose of the present invention is to provide an electric brake that prevents the noise caused by the noise.

For this reason, the configuration of the present invention is such that the brake disc is supported by a spline on the main shaft of the prime mover, and the brake discs are arranged on both sides of the brake disc. A second [9 friction butt is supported by an immovable guide pin that straddles the braking disc, and a second 1γ friction pad (nFJ) is moved by an electromagnetic repulsive force of J to the guide pin, In an electromagnetic brake that is pushed together with the first friction pad to both sides of the braking disk in 60, an electromagnetic anti-optical force is generated in the core body against the second Vq friction pad back metal. An electromagnetic coil and the guide pin are supported, and the second FXI 6 of the core body
A plurality of Q holes are provided in the end surface opposite to the pad, and a vibration isolating material such as rubber whose tip protrudes from the hole is fitted and supported in the hole,
Remove the core body so that the vibration damping material elastically abuts against the end wall of the original Ii:IJ machine? By connecting the J-pole 1 to the end wall of the motive force, it is covered to prevent vibration during braking operation.

The present invention will be explained based on an embodiment. As shown in FIG. A cylindrical vibration isolating material 20 made of rubber or the like is fitted into the hole, and the tip thereof is slightly protruded by a dimension δ from the mounting surface 16a of the core body 16 (jl +, :Jru (No. (Fig. 6). Then, when attaching the core body 16 to the electric motor 2, bend the vibration isolating material 20 within the range of δ and remove it (3,1@
F shift IF) 2+7) End wall 2a1. ＝Press tH so that it is fixed.

In the present invention, by forming the above-mentioned J and uni iR, the frictional vibration between the brake disc G and the friction pad 5 during braking is transmitted to the -C core wood weight 6 having the guide groove 7, and the frictional vibration between the brake disc G and the friction pad 5 is transmitted to the core body 1G and the core body 1G. Since the damper effect between the electric motor 2 and the electric motor 2 is absorbed by the vibration isolating material 20, it is possible to prevent the occurrence of squeal.

The electromagnetic Bu2 differs depending on its output etc., and the use 4
(Rotational speed and output torque vary depending on the situation.

Does the type of vibration (amplitude, frequency) differ accordingly?
In response to the second type of vibration, the anti-vibration UΔ2o is replaced with one with a different tampering effect, for example, one with a different protruding dimension a from the mounting surface 'lGa, but also by changing the nature of the vibration-isolating material 20 used. It is very possible to prevent the light 1 from cries.

According to one aspect of the present invention, the dimensions of the vibration isolating material 20,
It is possible to expect the most effective tampering effect by selecting the type of use and placement. Therefore, it is possible to take measures against fiii H! by stepping the hole for fitting the anti-JJΔ20 into the next electromagnetic brake, and minimizing the cost 1. can.

[Brief explanation of the drawing]

Figure 1 shows an outline of a general electric motor equipped with an electric brake (14a), and is a side view, Figure 2 shows the same electromagnetic brake with the brake removed, and Figure 3 shows the same. Front view,? +44th is a side view of the 4th brake, Figure 5 is line 4, page p;:
Side view according to v - v, Figure 0 is the main part of Figure 4 1t'l till r21-1:'' 1lL5 Le. 2: Electric! Pad G: For braking (reverse) 7: Guide pin 12 near r
i long flea coil '16; core body 17: main shaft 20:
Anti-vibration material special 1 Applicant Kuchibrake Kuwa Co., Ltd. Agent Patent attorney Toshio Yamaki 3 Figure 1 Figure 6 Figure 4 Figure 5 Figure 2

Claims (1)

[Scope of Claims] A brake disc is splined and supported on the main shaft of a prime mover, and first and second friction bands arranged on both sides of the brake disc are attached to immovable guide pins that straddle the brake disc. supported,
In an electromagnetic brake in which the second friction pad is moved along the guide pin by an electromagnetic force and pushed to both sides of the brake disc together with the first PIQ pad. The core body supports an electromagnetic coil and the guide pin that generate an electromagnetic repulsion force against the back metal of the second friction pad, and the front bar of the core body is supported by the guide pin.
1. A plurality of holes are provided on the end surface opposite to the second friction pad, and a vibration isolating material such as rubber whose tip protrudes from the hole is fitted and supported in the hole, and the vibration isolating material is attached to the end of the prime mover. The mm brake is characterized in that the core body is coupled to the end wall of the prime mover with mounting ports 1 to 1 so as to elastically abut against the wall, thereby preventing squealing during braking operation.