JPH04136528A - Braking mechanism for body of rotation - Google Patents

Abstract

PURPOSE:To reduce the number of parts by providing an arm having a center of rotation on one side of a radius line of a body of rotation which passes through a pad part of the arm, and providing an auxiliary arm through a flexed part integral with the arm on the other side to energize the auxiliary arm in the direction of pressing. CONSTITUTION:The pad part 2 of a braking mechanism is pressed against the outer periphery of a body 1 of rotation. The braking mechanism has an arm 3 rotatably supported about a pinch. The portions equivalent to(a, b) dimensions on one side of the radius line R of the body 1 of rotation are brought into the automatic thrust conditions. The head part extending in the run-off direction is bent back to form a flexed part 3b, an auxiliary arm 3c is provided to the flexed part 3b, and a pad part 2 is provided to the tip of the auxiliary arm. Pressing of the pad part is performed by a spring (energizing means) 5. The number of parts is thus reduced to obtain stable braking force.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention provides a method of applying pressure to a rotating body for rotation in both directions [Summary of the Invention] In a brake mechanism for a rotating body that applies a braking force, an arm is provided having a rotational fulcrum on one side with a radius line of the rotating body passing through the position of the pad portion as a boundary, and the arm has a rotation fulcrum on one side with the radius line as a boundary. An auxiliary arm section is integrally provided via a flexible section that bends at the other side position, and the pad section is provided at the tip of the auxiliary arm section, and the arm is biased in a direction in which the pad section presses the rotating body. By providing this means, a double-acting brake mechanism can be realized with a single arm, reducing the number of parts.

[Prior Art] Among brake mechanisms that apply a braking force to the rotating body by pressing a pad against the outer periphery of the rotating body, a double-acting brake mechanism is used to apply a stable braking force against rotation in both directions. will be adopted.

FIG. 3 shows the double-acting brake mechanism.

In FIG. 3, the outer periphery of the rotating body 1 is provided in a circumferential shape,
The pad part 2 of the brake mechanism is attached to this outer periphery when the brake is applied.
is forced upon you. The first arm 10 of the brake mechanism is rotatably supported by a base (not shown) around a first support pin 11, and the first support pin 11 is aligned with the radius line R of the rotating body 1 passing through the position of the pad portion 2. It is located on one side of the border (in the direction of penetration). The first arm 10 has a substantially Y-shape, and a second support bin 12 is erected at the branched portion. The second arm 13 is rotatably supported with respect to the first arm 10 around this second support pin 12, and
The support bin 12 is located on the other side (the relief direction side) with respect to the radius line R of the rotating body 1 passing through the position of the pad portion 2.

A pad portion 2 is fixed to one end of the second arm 13, and the surface of this pad portion 2 is located in the tangential direction of the outer surface of the rotor 1 at the contact position of the rotor 1. Here, the distance between the rotation center 01 of the first arm 10 and the radius line R is b, and the rotation center 01
If the distance between the surface of the pad portion 2 and the surface of the pad portion 2 is 01, and the coefficient of friction of the surface of the pad portion 2 is μ, it is designed to be in an automatic biting state with a relationship of b−cμ<0. A first spring 14 is hung between one end of the first arm 10 and the base.
The first arm 10 is urged by a spring force of 4 in the direction in which the pad portion 2 presses against the rotating body (in the direction of the arrow a).

Further, a second spring 14 is hung between the other end of the second arm 13 and the other branch end of the first arm 10.
The second arm 13 is urged by a spring force of 4 in the direction of pressing the rotor of the pad portion 2 (in the direction of the arrow b). 13 rotational displacement of the second arm is caused by the stopper portion 10 of the first arm 10
It is regulated by a.

In the above configuration, when the rotating body 1 rotates in the escape direction, the first support pin 11 is moved to the fulcrum 01 by the spring force of the first spring IO.
The brakes are applied in this state.

For rotation of the rotating body 1 in the biting direction, the brake is first applied with the first support pin 11 as the fulcrum 01, but
Since it is designed to be in an automatic biting state in the biting direction, it is independent of the spring force of the first spring 14. In this state, the brake is applied by the spring force of the In2 spring 15 with the second support pin 12 as the fulcrum 02. Therefore, since the braking force depends on the spring force of the first spring 14 in the escape direction and on the spring force of the second spring 15 in the biting direction, braking forces in both directions can be set respectively. Further, since the pad portion 2 acts in a relief motion in response to rotation in both directions, a stable braking force can be obtained.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional configuration, two arms and two springs are required, and the configuration is simplified.

There is a desire to reduce the number of parts due to requirements such as ease of assembly, cost savings, and space savings.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a brake mechanism for a rotary body that can realize a double-acting brake with a smaller number of parts than conventional brakes.

[Means for Solving the Problems] A brake mechanism for a rotating body according to the present invention for achieving the above-mentioned problems includes a brake mechanism for a rotating body that applies a braking force to the rotating body by pressing a pad portion on the outer periphery of the rotating body. In the brake mechanism, an arm is provided that has a rotational fulcrum on one side with a radius line of the rotating body passing through the position of the pad portion as a boundary, and the arm has a flexible portion that bends at a position on the other side with the radius line as a boundary. an auxiliary arm section is integrally provided through the auxiliary arm section, the pad section is provided on the auxiliary arm section, and the pad section is configured to be able to be displaced by the deflection of the flexible section, and the pad section is configured to be able to be displaced by the direction in which the pad section presses the rotating body. A biasing means for biasing the arm is provided.

[Function] For rotation in the escape direction, a brake is applied using the rotational fulcrum of the arm as a fulcrum, and for rotation in the biting direction, a brake is applied using the vicinity of the deflection part as a fulcrum in the automatic biting state, so rotation in both directions is applied. Stable braking force can be obtained, and this double-acting brake can be configured with a single arm.

[Example code] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic configuration diagram of a brake mechanism showing a first embodiment of the present invention. In FIG. 1, the outer periphery of a rotating body 1 is provided in a circumferential shape, and a pad portion 2 of a brake mechanism is pressed against this outer periphery when a brake is applied. The brake mechanism has an arm 3, and a base 3a of the arm 3 is rotatably supported by a base (not shown) around a support pin 4. This support bin 4 is located on one side (the side in the biting direction) of the radius line R of the rotating body 1 passing through the position of the pad portion 2, and is shown in FIG.

The dimension C is designed to achieve the automatic biting state described in the conventional example. One side of the base 3a of the arm 3 is extended in the escape direction, and its tip is reduced in cross-sectional dimension to 1.
80@ It is configured as a bent portion 3b having a folded shape. This flexible portion 3b further includes an auxiliary arm portion 3c.
is integrally provided, and the pad portion 2 described above is provided at the tip of this auxiliary arm portion 3c. The pad portion 2 is shown in FIG. 1 by the flexure of the flexure portion 3b. 2 as the approximate fulcrum. On the other hand, a spring 5 is hung between the other end of the base portion 3a of the arm 3 and the base, and the spring force of the spring 5 causes the arm 3 to move in the direction in which the pad portion 2 is pressed against the rotating body 1 (as shown in FIG. (in the direction of the arrow).

In the above configuration, when the rotary body 1 rotates in the escape direction, the pad portion 2 presses the rotary body 1 with the support pin 4 as the fulcrum OI by the spring force of the spring 5, and a brake is applied. Rotating body 1
For rotation in the biting direction, the brake is first applied using the support pin 4 as the fulcrum 01, but since it is designed to automatically bite in the biting direction, it has nothing to do with the spring force of the spring 5. . In this state, the elastic force of the flexible portion 3b causes the fulcrum 0 shown in FIG. The pad portion 2 presses the rotating body 1 approximately as a fulcrum to apply the brake, and from the above, a stable braking force can be obtained against rotation in both directions.

FIG. 2 shows a schematic configuration diagram of a brake mechanism showing a second embodiment of the present invention. In FIG. 2, the arm 3 of the second embodiment has an auxiliary arm portion 3C extending further than that of the first embodiment. Further, the other end side of the base portion 3a of the arm 3 is also extended, and a stopper portion 3d is integrally provided at the tip thereof. The tip of the auxiliary arm portion 3c is located between the base portion 3a and the stopper portion 3d, and is configured to be movable only between this portion. An auxiliary spring 6 is interposed between the base portion 3a and the auxiliary arm portion 3c, and the auxiliary arm portion 3c is urged toward the stopper portion 3d by the force of this spring (indicated by an arrow in FIG. 2). . Since the other configurations are the same as those in the first embodiment, the same reference numerals as in FIG. 1 are given to FIG. 2, and the explanation thereof will be omitted.

In the above configuration, the rotation in the escape direction operates in the same manner as in the first embodiment. In response to rotation in the biting direction, the force due to the elastic force of the flexible portion 3b and the spring force of the auxiliary spring 6 are applied in the automatic biting state to 0 as shown in FIG.
The brake is applied by pressing the rotating body 1 of the pad portion 2 using the pad portion 2 as a substantially fulcrum.

The first embodiment relies only on the elastic force generated by deflection, but the second embodiment relies on spring force in addition to the elastic force caused by deflection, which has the advantage of stabilizing the braking force in the biting direction. .

[Effects of the Invention] As described above, according to the present invention, in a brake mechanism for a rotating body that applies a braking force to the rotating body by pressing a pad on the outer periphery of the rotating body, An arm having a rotational fulcrum on one side of the radius line of the rotating body is provided, and an auxiliary arm part is integrally provided to this arm via a flexible part that bends at a position on the other side of the radius line. The pad section is provided at the tip of this auxiliary arm section, and a biasing means for biasing the arm in the direction in which the pad section presses the rotating body is provided, so a double-acting brake mechanism is realized with a single arm. This has the effect of reducing the number of parts that can be produced.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a brake mechanism for a rotary body according to a first embodiment of the present invention, and FIG. 2 is a schematic diagram of a brake mechanism for a rotary body according to a second embodiment of the present invention. FIG. 3 is a schematic diagram of a conventional brake mechanism. 1...Rotating body, 2...Pad section, 3...Arm,
3b... Flexible part, 3C... Auxiliary arm part, 5...
・Spring (biasing means), R...Radius line. Figure 3

Claims (1)

[Claims] (1) In a brake mechanism for a rotating body that applies a braking force to the rotating body by pressing a pad part on the outer periphery of the rotating body, the rotating body rotates to one side with a radius line of the rotating body passing through the position of the pad part as a boundary. An arm having a fulcrum is provided, an auxiliary arm portion is integrally provided on this arm via a flexible portion that bends at a position on the other side of the radius line, and the pad portion is provided on the auxiliary arm portion, and the pad portion is provided on the auxiliary arm portion. A brake mechanism for a rotating body, characterized in that the pad part is configured to be displaceable by the deflection of the flexible part, and includes a biasing means for biasing the arm in a direction in which the pad part presses the rotating body.