JPH021549Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a brake release mechanism, particularly a brake release mechanism of a brake device having a rotating plate, a brake lining, a spring, an electromagnet, and the like.

This type of conventional device will be explained with reference to FIGS. 1 and 2.

At the tip of the rotating shaft of a motor, etc., there is a disc-shaped rotating plate 1.
0 is fixed. In addition, a donut-shaped brake lining 1 is provided at a position facing the rotating plate 10.
An armature 14 is provided to which 2 is fixed. Although the armature 14 is prevented from rotating by a pin 16, it is formed so that it can move forward and backward in the direction of the rotation axis. Also, this armature 14 is
Although it is normally pressed against the rotating plate 10 by the elastic force of the spring 18, when the electromagnet 20 is energized,
It resists the elastic force of the spring 18, attracts the electromagnet 20, and separates from the rotary plate 10. Furthermore, a shaft 22, which is a brake release shaft for releasing the brake from the operating state, is loosely mounted in the center of the armature 14.
A lever 24 has a cam at the tip for moving the shaft 22 in the axial direction of the armature 14.
is provided. Also, the shaft 22 has a spring 2.
A shaft 22 is normally located on the armature 14 side with a lever 6 interposed therebetween, and the armature 14 is moved away from the rotary plate 10 by the shaft 22 only when the lever 24 is operated. In addition, 28 in the figure indicates the shaft 22 and the armature 14.
This is a system for adjusting the connection position.

Next, the operation of this conventional device will be explained.

When the lever 24 is horizontal as shown in FIG. It is fixed by the friction torque caused by the pressing force. Conversely, when the electromagnet 20 is energized by electricity, the armature 14 is absorbed against the pressing force of the spring 18, and the brake lining 12
is detached from the rotary plate 10, and the rotary plate 10 rotates freely. At this time, when the power to the electromagnet 20 is cut off again, the brake lining 12 is moved by the spring 18.
The armature 14 to which the brake lining 12 is fixed is pressed against the rotating plate 10 by the pressing force of
is prevented from rotating by the pin 16, so the pressing of the brake lining 12 against the rotary plate 10 acts as a brake.

When the lever 24 is tilted down as shown in FIG. 2 during this braking action, the shaft 22 connected to the lever 24 moves in the direction of the electromagnet 20 and the armature 1
4, the armature 14 is further moved in the direction of the electromagnet 20 against the pressing force of the springs 18 and 26, and as a result, the brake lining 12 is separated from the rotary plate 10 and the braking action is released.

However, in such a conventional device, a shim 28 must be used to adjust the stroke between the armature 14 and the cam of the shaft 22, which not only increases the number of parts but also requires a lot of time for adjustment. . Furthermore, since the movement stroke of the shaft 22 by the cam is larger than the suction stroke of the armature 14 to the electromagnet 20, if the connection position between the shaft 22 and the armature 14 is incorrectly adjusted too early, the shaft 22 As the armature 14 moves along with the movement, the armature 14 collides with the electromagnet 20, which may cause damage to the cam of the lever 24, the shaft 22, etc.

The present invention was devised in view of the above-mentioned conventional problems, and its purpose is to eliminate the need for shims by connecting the armature and shaft via a spring, and also to prevent the armature from colliding with the electromagnet. To provide a brake release mechanism which eliminates member damage due to the deflection of a spring even when the brake is in contact with the brake release mechanism.

In order to achieve the above object, the present invention includes an armature to which a brake lining is fixed, and a first armature that urges the armature to press the brake lining against a rotary plate that is an object to be braked.
the first spring by being energized;
an electromagnet that attracts and adsorbs the armature in a direction in which the brake lining is separated from the rotary plate against the biasing force of a spring, and that contacts the armature and restricts movement of the armature in the direction away from the rotary plate; and a reciprocating slide. a brake release that transmits a sliding movement so that the armature moves from the rotary plate side to the electromagnet side against the biasing force of the first spring when the shaft is movable and slides in one direction; a spring having a higher spring constant than the first spring provided between the shaft, the armature and the brake release shaft, the spring being provided between the armature and the brake release shaft when the brake release shaft slides in the one direction; a second spring biasing the brake release shaft in the direction of separating the brake release shaft from the brake release shaft after the armature comes into contact with the electromagnet and stops due to the compression action of the second spring; It is characterized by allowing movement.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

The present invention is shown in Figures 3 and 4.
Components that are the same as those in FIG.

The shaft 22 is longer in the direction of the rotating plate 10 than in the past, and a disc spring 30, which is a second spring with a higher spring constant than the first spring 18, is interposed between the shaft 22 and the armature 14. It has been done. Also, it is not used in the shim 28.

The brake release mechanism according to the present invention configured in this manner operates in the same manner as the conventional one because the disc spring 30 does not affect the armature 14 when the lever 24 is horizontal as shown in FIG. .

When the lever 24 is pushed down as shown in FIG. 4 during braking, the shaft 22 connected to the lever 24 moves in the direction of the electromagnet 20, and as a result, the armature 14 is moved toward the electromagnet 20 via the disc spring 30.
It will move in the direction. At this time, the disc spring 30
Since spring 18 has a higher spring constant than spring 18, disc spring 30 is hardly bent, and spring 1
8 is bent to move the armature 14 in the direction of the electromagnet 20. Furthermore, when the armature 14 collides with the electromagnet 20, the armature 1
Since the movement of the armature 4 is regulated by the electromagnet 20, the armature 14 is then brought into pressure contact with the electromagnet 20 while bending the disc spring 30.

Therefore, in the present invention, the shaft 22 and armature 14 of the brake release mechanism are connected via the disk spring 30, which has a higher spring constant than the spring 18 that presses the brake lining 12 against the rotating plate 10. There is no need to adjust the connection position, making assembly and manufacturing extremely easy. Also, suppose armature 14 is electromagnet 2.
Even if the shaft 22 and the lever 24 collide with each other, damage to the shaft 22, lever 24, etc. can be prevented by deflecting the disc spring 30.

Further, when the suction stroke of the armature 14 by the electromagnet 20 is relatively small, the brake lining 12 and the fixed plate 10 fixed to the armature 14 can be reliably released by causing the armature 14 to collide with the electromagnet 20.

In the above description, the disc spring 30 was described as a spring with a higher spring constant than the spring 18.
Other coil springs or the like can also be used.

As explained above, the present invention not only eliminates the need for complicated adjustments during assembly, but also prevents damage to components.

[Brief explanation of drawings]

1 and 2 are cross-sectional views showing different states of a conventional brake device, and FIGS. 3 and 4 are cross-sectional views showing different states of a brake device using the present invention. The same members in each figure are given the same reference numerals, 10 is a rotating plate, 12 is a brake lining, 14 is an armature, 18 is a spring, 20 is an electromagnet, 22
is a shaft, 24 is a lever, and 30 is a disc spring.

Claims (1)

[Scope of utility model registration request] an armature 14 to which a brake lining 12 is fixed; a first spring 18 that biases the armature so as to press the brake lining 12 against the rotating plate 10 that is the object of braking;
The first spring 18 is energized.
an electromagnet that attracts and attracts the armature 14 in a direction to pull the brake lining 12 away from the rotary plate 10 against the urging force of the rotary plate 10 , and contacts the armature 14 to restrict movement of the armature 14 in the direction away from the rotary plate 10 20, a shaft capable of reciprocating sliding movement, which moves the armature 14 to the first spring 1 during sliding movement in one direction.
a brake release shaft 22 that transmits a sliding motion so as to move the armature 1 from the rotary plate 10 side to the electromagnet 20 side against the urging force of the armature 1;
A spring having a higher spring constant than the first spring 18 provided between the armature 14 and the brake release shaft 22 when the brake release shaft 22 slides in the one direction. a second spring 30 that urges the brake release shaft 22 in a direction to separate the brake release shaft 22 after the armature 14 stops contacting the electromagnet 20 due to the compression operation of the second spring 30; A brake release mechanism characterized by allowing sliding movement in one direction.