JPS6030834A - Disk brake device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a non-excitation type disc brake device in which braking torque can be easily adjusted.

[Prior art and its problems]

A conventional example of a non-excitation type disc brake device will be explained based on FIG. 1. This figure shows the braking state, in which a rotary brake disc 3 is fitted onto the end of the rotary shaft 1 and movably in the axial direction on the outer periphery of the center hub 2, and brake linings are provided on both sides of the outer periphery. 8a is fixed. On one side of the rotational braking disk 3, a defining braking disk 4 axially opposed thereto is attached to the outer circumferential end of a support frame 6 that supports the rotating shaft 1 via a bearing 5, and on the other side thereof. An annular movable iron core 7 facing this in the axial direction is provided so as to be movable only in the axial direction. On the side of the movable core 7 opposite to the rotational braking disk 3, an annular fixed core 8 facing the movable core 7 in the axial direction is attached to the side surface of the support frame 6. On the end face of the fixed iron core 8, a supporting plate 9 is attached which supports the movable iron core 7 so as to be movable only in the axial direction.
A coiled brake spring 10 is provided which presses towards the vehicle. This brake spring 10 performs a braking action by pushing the rotating brake disc 8 against the fixed brake disc 4 via the movable iron core 7.

An annular electromagnetic coil 11 is embedded in the fixed iron core 8,
When this electromagnetic coil 11 is excited, the fixed iron core 8
The movable iron core 7 is attracted by the electromagnetic attraction force against the pressing force of the brake spring 10, thereby releasing the brake.

In such a structure, when adjusting the braking torque, it is necessary to replace the brake spring 10, so there is a drawback that it takes a lot of work to remove and reinstall related parts when replacing the brake spring 10. T-ko.

[Purpose of the invention]

In order to eliminate the drawbacks listed in Q'd, it is an object of the present invention to provide a non-excitation operated disc brake device in which the braking torque can be easily adjusted without replacing the brake spring. do.

[Key points of the invention]

In order to achieve the object set forth in item 61, this invention provides an adjustment spring that acts in the opposite direction to the brake spring between the fixed brake disc and the movable core so that adjustment can be made from the outside.

[Embodiments of the invention]

FIG. 2 shows an embodiment of the present invention, and the same parts as in FIG. 1 are denoted by the same reference numerals. This figure shows the braking state, with the braking spring 1 between the fixed braking disk 24 and the movable iron core 7.
A coil-shaped adjustment spring 21 is provided that performs a pressing action in a direction opposite to the pressing direction of zero. This adjustment spring 21 is held at the tip of a guide pin 9 that protrudes from the side surface of the movable iron core 7, and a screw 22 is screwed through the fixed brake disc 24.
is pressed against the movable iron core 7 at the tip. Said screw 2
2 is prevented from loosening by a nut 23, and a washer 25 is inserted between the adjustment spring 21 and the adjustment spring 21.

According to the embodiment, the braking action is performed by the difference in the pressing force between the braking spring 10 and the adjustment spring 21, so the braking torque can be adjusted by adjusting the pressing force of the adjustment spring 21 by screwing in the screw 22 appropriately. .

〔Effect of the invention〕

According to this invention, in the non-excitation type disc brake device, an adjustment spring that acts in the opposite direction to the heat braking spring is provided between the fixed braking disc and the movable core so that it can be adjusted from the outside. The effect is that the braking torque can be easily adjusted without replacing the parts.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a conventional disc brake device, and FIG. 2 is a longitudinal sectional view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Rotating shaft, 8... Rotating brake disc, 7... Movable iron core, 8... Fixed iron core, 10... Braking spring, 11...
... Electromagnetic coil, 21 ... Adjustment spring, 24 ... Fixed brake disc. ) Figure 1 Figure 2

Claims (1)

[Claims] 1) A rotary brake disc fitted into the rotating shaft so as to be movable in the axial direction, a fixed brake disc facing the side surface thereof in the axial direction,
1iJ A movable iron core provided axially opposite to the other side of the rotary brake disc and movable only in the axial direction, and a rotary brake disc pressed against the fixed brake disc via this movable core for braking action. With the braking spring that does? and a fixed iron core that attracts the movable iron core against the braking spring as the magnetic coil is energized. A disc brake device characterized in that a working adjustment spring is provided so as to be adjustable from the outside.