JP2534771Y2 - brake disc - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention is of a type in which a hub and a braking portion are separated from each other, and a pin is provided on a torque receiving surface of both members with a small gap so that the two members can move slightly relative to each other. , A floating type brake disc.

[0002]

2. Description of the Related Art In a floating type brake disk, thermal expansion due to frictional heat during braking occurs only in a braking portion,
The braking part has an advantage that irregular heat distortion does not occur because of the ring shape, but since both members and the pin are separate bodies,
An impact is likely to occur between the pin and the pin during braking and driving. In order to alleviate this impact, a disc spring that presses against both members is generally fitted to the pin to restrict the free movement of both members. (For example, Jpn.
issue).

FIG. 4 shows an example of a brake disk of this type. A pin e is inserted into a concave portion b of a hub a and a concave portion d of a braking portion c, and a disc spring g and a washer are placed on a step portion f of the pin e. h and is fixed at the swaged portion i. However, in this type, there is a disadvantage in that the brake disk is expensive because the disc spring g is considerably expensive.

In a brake disc of this type, the gap j between the hub a and the braking portion c is usually small as shown in FIG. 5A, and the circumferential gap k between the recess d and the pin e is normally small.
If the braking part c thermally expands due to frictional heat during braking,
As the diameter increases, the gap j increases as shown in FIG.
Since the circumferential gap k between the pin e and the concave portion d is also large, the impact is also large. In order to suppress the occurrence of the impact, the disc spring must be made strong, which leads to an increase in cost.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to improve the above-mentioned prior art and to obtain a low-cost brake disk having a small impact between a pin, a braking portion and a hub during braking and driving. And

[0006]

According to a first aspect of the present invention, there is provided a brake control apparatus comprising: an outer peripheral portion of a hub; and an inner peripheral portion of a braking portion surrounding the hub. In a brake disc in which opposing torque receiving surfaces are provided, pins are inserted and locked between the respective torque receiving surfaces, and the hub and the braking portion are pressed by a spring fitted to the pins, a spring fitting portion of the pin is provided. Provided a clamping portion for bending the spring toward the hub and the braking portion,
The center of a flat spring is sandwiched, and the hub and the braking portion are pressurized at the tip.

According to a second aspect of the present invention, the outer peripheral portion of the hub and the inner peripheral portion of the braking portion surrounding the hub are provided with opposed torque receiving surfaces. In the brake disk in which the pin is inserted and locked, and the hub and the braking portion are pressurized by the spring fitted to the pin, the hub and the braking portion are equidistantly extended substantially radially from the circumferential seating surface. A plurality of pairs of torque receiving surfaces are provided in the normal rotation direction and the reverse rotation direction, and pins are inserted and locked between the torque reception surfaces of each pair.

[0008]

In the above-mentioned first means, the flat spring is deformed by the holding portion and its tip is pressed against the hub and the braking portion, thereby suppressing the generation of an impact due to the frictional force.

In the second means, even if the diameter of the braking portion increases due to thermal expansion, the two opposing torque receiving surfaces are displaced substantially in the radial direction, but hardly displaced in the circumferential direction. The gap between them does not change and the impact does not increase.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a brake disc, the left half of which shows a state where no pin is mounted, and the right half shows a state where a pin is mounted. The hub 2 of the brake disc 1 is provided with a shaft hole 3, a hole 4 for weight reduction, and a notch 5. A large number of projections 7 are provided on the outer peripheral side and rise from a seating surface 6 formed in the circumferential direction. Every other torque receiving surface 7b facing the direction is provided.

The braking portion 8 has a large number of drain holes 9, and a seating surface 10 for keeping a small gap with the projection 7 is provided on the inner peripheral side thereof. Protrusion 1
1 is provided with a torque receiving surface 11a facing in the forward direction and a torque receiving surface 11b facing in the opposite direction. Then, the opposing torque receiving surfaces 7a and 11b or 7b and 11a face a substantially radial direction as shown in FIG.
The pin 12 is inserted into the space S, and the pin 12 is held between the two seating surfaces 6 and 10.

As shown in FIG. 3, the pin 12 is provided with a tapered step 13 and a small-diameter portion 14 having a lower outer peripheral side at positions exposed from the hub 2 and the braking portion 8.
Then, a plate-shaped spring 15 having a circular center hole and a washer 16 having an inclined surface having the same angle as the step portion 13 on the lower surface are fitted and caulked. The spring 15 is elastically deformed into a dish shape and is fixedly held by the holding portion 17 formed from the step portion 13 to the caulking portion 14 a, and the tip of the spring 15 is pressed against the hub 2 and the side surface of the braking portion 8. Bring friction contact.

As described above, the hub 2, the pin 12, and the braking unit 8
Is limited by the friction of the spring 15, so that the occurrence of an impact is suppressed. Further, the braking portion 8 thermally expands due to frictional heat during braking, and a gap j with the hub 2 shown in FIG.
Is increased as shown in (b), the torque receiving surface 11a
It only moves in the direction of its extension, and the torque receiving surface 11
The interval S between a and 7b does not change, and the gap k does not change.
Therefore, an increase in impact is prevented.

[0014] The means of claim 1 of the present invention is:
The present invention is not limited to the one having the torque receiving surface in the radial direction according to the second aspect, but may be applied to the one having a torque receiving surface composed of a semicircular concave portion shown in FIG.

[0015]

As is clear from the above description, according to the first aspect of the present invention, the floating type brake disk does not use an expensive disc spring, but a flat spring has a shock absorbing effect. According to the means of item 2, even if the braking portion thermally expands, the distance between the braking portion, the pin, and the hub does not change, and the effect of reducing the impact is exerted.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIGS. 2A and 2B are enlarged views of a main part, in which FIG.

FIGS. 3A and 3B are cross-sectional views of main parts, in which (a) is before caulking and (b) is after caulking;

FIG. 4 is a sectional view of a conventional example.

FIG. 5 is an enlarged view of a main part of the above, in which (a) is a normal state and (b) is a thermal expansion state.

[Explanation of symbols]

 2 Hub 6, 10 Seat surface 7a, 7b, 11a, 11b Torque receiving surface 12 Pin 15 Spring 17 Holding portion

Claims (2)

(57) [Scope of request for utility model registration] An opposing torque receiving surface is provided on an outer peripheral portion of a hub and an inner peripheral portion of a braking portion surrounding the hub, and a pin is inserted and locked between the torque receiving surfaces, and a spring fitted to the pin is provided. In the brake disk where the hub and the braking part are pressurized, a pinching part for bending the spring toward the hub and the braking part is provided at the spring fitting part of the pin, and the center of the flat spring is held and the hub and the braking are Brake disc characterized by pressurized parts. 2. A spring which is provided with opposed torque receiving surfaces on an outer peripheral portion of a hub and an inner peripheral portion of a braking portion surrounding the hub, wherein a pin is inserted and locked between the respective torque receiving surfaces, and a spring fitted on the pin is provided. In the brake disk in which the hub and the braking portion are pressurized, the hub and the braking portion are provided with a plurality of pairs of equally-spaced torque receiving surfaces extending substantially radially from the circumferential seating surface in the normal rotation direction and the reverse rotation direction. A brake disc, wherein a pin is inserted and locked between each pair of torque receiving surfaces.