JPS58109741A - Actuation detector of disc brake - Google Patents

Abstract

PURPOSE:To improve the reliability of the actuation detection of the disc brake by a method wherein the movement of a fixed disc is detected by an actuation detecting switch installed at the side of a foundation. CONSTITUTION:When the disc brake 3 is put into operation, load causes to rotate the disc brake toward the direction as illustrated with the arrow A through a shaft 1. At this time, the projection 3a provided on the disc brake 3 compresses an elastic body 6, resulting in rotating the disc brake 3 a little or by the compressed amount of the elastic body 6 and, because the bracket 4b is fixed to the foundation 2, no further rotation of the disc brake 3 is allowed and the state of no rotation of the disc brake 3 is maintained. On the other hand, when the disc brake 3 is rotated a little as described above, the striker 3b of the disc brake 3 actuates a limit switch 5, resulting in detecting the state of actuation of the brake thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a disc brake operation detection device.

Equipped with a rotating disk and a fixed disk that rotate together with the shaft, an electromagnetic coil provided on the fixed disk side is excited, and the electromagnetic force at that time moves the rotating disk in the axial direction and presses it against the fixed disk. Disk brakes release the shaft by stopping rotation, de-energizing the electromagnetic coil, and returning the rotating disk to its original position with a spring. (1) The axial movement of the rotating disk is controlled by a photoelectric switch. Detected by. The movement toward the rotating disk is detected by a microswitch. (The operating state of the disc brake is detected by detecting the energization state of the It or 11 magnetic coil with a detector, but in the case of (1), an expensive photoelectric switch is required, increasing the equipment cost, The reliability of the photoelectric switch will be impaired in adverse environments.In the case of ``('', the amount of movement in the axial direction of the rotating disk is minute (several B), so the reliability will be impaired near the lower limit of the microswitch's detectable stroke. In the case of recirculation, there was a problem of lack of reliability because even if the electromagnetic coil was energized, it did not necessarily mean that the disc brake was mechanically activated.

The present invention addresses the above-mentioned problems, and provides a disc brake comprising a rotating disc that rotates with a shaft, a stationary disc that has a projection, and a pair of base-side brackets that are provided on both sides of the projection and spaced apart from the projection. and an elastic body provided between one side of the bracket and the protrusion, and an operating Yokota switch on the base side that detects the movement of the fixed disc. The purpose is to improve the reliability of operating state detection. Another object of the present invention is to provide an improved disc brake operation detection device that can reduce device costs.

Next, the first aspect of the disc brake operation detection device of the present invention.
To explain with an example shown in Figure 2.3, (1) is a shaft connected to a load (not shown), (2) is a foundation, and (3) is a disc brake, some of which are omitted from illustration. (3) a rotating disk attached to the shaft (1) so as to be movable in the axial direction; and (3) a fixed disk attached to the shaft (1), an electromagnetic coil, and a spring biasing the rotating disk in the direction of the release position. In addition, (3α) is a disc brake (3
), and brackets (4α) (4b) are attached to the foundation (2) so as to sandwich the same protrusion (3a) from both sides. Bracket (4α) (4b) and protrusion (3
α) is not fixed (there is a slight gap, one flannan).A spring-like elastic body (6) is attached to C4b), and the protrusion (31) of the brake (31) is attached to C4b).
3α) in the direction of the -h bracket (4α). A striker (3b) is attached to the Mayu brake (3), and this striker (3b)
) faces the limit switch (5) attached to 4# (2)) with a bracket (5α). This limit switch (5) is for detecting the operation of the brake.

Next, let us explain the operation of the disc brake operation detection device.
A. When the disc brake (3) is activated aDK,
The load tries to rotate the disc brake (3) in the direction of the arrow (A1) through the shaft (1).
) will compress the elastic body (6), and the disc brake (3) will rotate slightly by the amount of compression, or the disc brake (Flannan) will compress the elastic body (6).
(47) is fixed to the foundation (2), so its state is maintained without any further rotation. On the other hand, as mentioned above, when the disc brake (3) rolls slightly, the striker (3b) of the disc brake (3) activates the limit switch (5), so this limit switch (5) causes the brake to brake. The operating state of the is detected. Next, a description will be given of what happens when the disc brake (3) is in the non-operating state (released state) VC. This sharpening prevents the rotating disc and fixed disc of the disc brake (3) from separating, and the rotational torque of the shaft (1) is not transmitted to the fixed disc side. Therefore, the brake case becomes free, and the elastic body (6) moves against the protrusion (3) of the disc brake (3).
Press α) onto the other bracket (4α). That is, the disc brake (3), which had rotated slightly after being in the braking state, is returned to its original position. Therefore, the striker (3b) of the disc brake (3) is the limit switch (5).
Release of the brake is detected apart from .

[The current disc brake operation detection device has an operating distance of only a few tons. However, the present invention is configured as described above, and the brake operating distance I is detected by a switch or the like.
I (operating distance of the striker (3b) in the above implementation 1)
is large, so reliability can be improved. Furthermore, since a photoelectric switch is not required, there is a significant effect of reducing equipment costs.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

FIG. 1 is a front view showing an embodiment of the disc brake operation detection device according to the present invention, FIG. 2 is a side view thereof, and FIG. 6 is a front view showing the disc brake operation detection state. (1 )...Shaft, (2)...Foundation, (3)...Disc brake, (3α)...Protrusion, (4α) (4h)
... Bracket, (5) ... Motion detection switch, (
6)...Elastic body. Sub-Agent Patent Attorney Shige Okamoto 2 persons (AA) Figure 2 tt 221

Claims (1)

[Claims] A disc brake consisting of a rotating disk that rotates with a shaft, a fixed disk having a protrusion, a pair of base side brackets provided on both sides of the protrusion at a distance from the protrusion, and one of the brackets and the protrusion. An operation detection device for a disc brake, characterized in that the intervening device is comprised of nine elastic bodies and an operation detection switch on the base side that detects the movement of the fixed disk.