JPH042814B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a brake device for a vehicle, and is used in automobiles, industrial vehicles, and the like.

(Prior Art) As a vehicle brake device, there is one related to an earlier application by the present applicant (Japanese Patent Laid-Open No. 56-97639). As shown in Fig. 5, this includes a wheel disc 21, a brake drum 22, and an axle shaft 2.
3 are integrally connected by bolts and nuts,
A V groove 24 is provided on the end surface of the cylindrical portion of the brake drum 22.
is formed in a ring shape. An annular V-shaped braking member 25 is attached so as to be in close contact with the V-groove 24, the V-shaped braking member 25 is fixed to a flange portion 26a of a brake ring 26, and a boss portion 26b of the brake ring 26 has a spline means 27. The housing 28 is fixed to an axle housing 29, and the axle shaft 23 is pivotally supported by a bearing attached to the housing 28. An annular piston 26 is attached to the boss portion 26b of the brake ring 26.
c are integrally molded concentrically, the piston 26c is fitted into an annular cylinder 30 fixed to the housing 28, and seal members 31a and 31b are fitted into both the inside and outside of the opening of the annular cylinder 30, respectively. A wheel cylinder 32 is constituted by the piston 26c, the annular cylinder 30, and the seal members 31a and 31b. 33a and 33b are flexible seal members, 34a and 34b are dust prevention covers, and 35 is a retaining ring.

(Problems to be Solved by the Invention) In this conventional brake device, a wheel cylinder 32 is configured by a piston 26c, an annular cylinder 30, and seal members 31a, 31b, and a boss portion 26b of the brake ring 26 is a spline member. 2
The flange portion 2 of the brake ring 26 is slidably fitted in the housing 28 in the axial direction via the flange portion 2 of the brake ring 26.
Since the V-shaped braking member 25 fixed to the brake drum 22 is frictionally engaged with the brake drum 22, there is a problem that the brake device becomes larger and more complicated.
Therefore, the problem to be solved by the present invention is to miniaturize and simplify the brake device.

(Means for Solving the Problems) A means for solving the above problems is to use a rotating disk that has an annular V-groove on its side surface and a plurality of through holes extending from the V-groove to the outer circumferential surface. and an annular member having an annular piston member and an annular V-shaped braking member attached to the inner periphery of the side surface and a plurality of insertion holes bored on the outer periphery of the side surface, and an annular member that engages with the insertion hole of the annular member. The present invention is to provide a torque support member that fits together with the hub, and a hub having an annular groove that engages with the annular piston and an engagement hole that engages with the torque support member on the end surface that contacts the annular member.

(effect) The above means works as follows.

When the annular member is pressed against the rotating disk, the V-shaped braking member of the annular member that is engaged with the hub via the torque support member and the V groove of the rotating disk are frictionally engaged, and the V-shaped braking member and V A large amount of pressure is generated on the friction surface with the groove, generating a large braking force. Next, the abrasion powder generated by the frictional engagement moves through the V-shaped gap between the rotating disk and the braking member toward the through hole due to the centrifugal force caused by the rotation of the rotating disk, and penetrates through the through hole. It is discharged to the outside through the hole opening.

When the frictional engagement between the V-shaped braking member of the annular member and the V-groove of the rotating disc is released, the V-shaped braking member separates from the rotating disc, and the centrifugal force caused by the rotation of the rotating disc allows outside air to penetrate. It flows into the hole and cools the outer circumferential end of the rotating disk.

(Example) Hereinafter, an example showing a specific example of the above means will be described.

1 to 4, 1 is a wheel disk, 2 is a rotating disk, and 3 is a shaft, which are integrally connected by bolts and nuts as shown. Cooling fins 4 are formed on the outer periphery of the rotating disk 2, an annular V-groove 5 is formed on the side surface of the rotating disk 2, and a through hole 6 extends from the V-groove 5 to the outer periphery of the rotating disk 2. There are several. An annular V-shaped braking member 7 is fitted so as to be in close contact with the V-groove 5, and 1/2 of the V-shaped angle of the V-groove 5 is between the V-groove 5 and the braking member 7 that fits into the V-groove 5. is formed to have a predetermined angle larger than a friction angle corresponding to a friction coefficient of It is formed. The braking member 7 is fixed to the inner peripheral side of the annular member 8, and an annular piston member 9 is integrally formed concentrically at a position facing the braking member 7 via the annular member 8, and is engaged with the piston member 9 on the hub 10. A matching annular groove 10a is bored, and an annular seal member 11 is formed between the piston member 9 and the hub 10.
a, 11b are fitted therein, and the piston member 9, the annular groove 10a, the annular seal member 11a,
11b, a wheel cylinder 12 is formed. An insertion hole 13 is formed in the outer peripheral side of the annular member 8, and a torque support member 14 is inserted through the insertion hole 13.
It is locked in an engagement hole 10b drilled in the end face of 0. The shaft 3 is supported by bearings 15a, 15b, and 15c attached to the hub 10,
Annular oil seal members 16a, 16 are provided between the hub 10 and the shaft 3 at the openings on both end faces of the hub 10.
17 is an annular flexible dust boot.

Master cylinder (not shown) during braking
When this hydraulic pressure acts on the wheel cylinder 12, the piston member 9 is pressed, and the braking member 7 is pressed against the V-groove 5 via the annular member 8. Then,
Due to the wedge principle, a large pressure is generated on the friction surface between the V-shaped braking member 7 and the V-groove 5, generating a large braking force. Moreover, abrasion powder is generated due to the frictional engagement between the V-shaped braking member 7 and the V-groove 5, and the abrasion powder is caused by the centrifugal force caused by the rotation of the rotary disk 2 between the V-groove 5 of the rotary disk 2 and the V-groove 5. It moves toward the through hole 6 through the V-shaped gap with the character-shaped brake member 7, passes through the through hole 6, and is discharged to the outside from the opening of the through hole 6.

When the hydraulic pressure of the wheel cylinder 12 is released, the frictional engagement between the V-shaped braking member 7 and the V-groove 5 is released, and then the V-shaped braking member 7 and the V-groove 5 are released from close contact, and further the piston member 9 is the annular seal member 1
The V-shaped braking member 7 is separated from the rotating disk 2 by the retraction action of the members 1a and 11b.

(Effect of the invention) The present invention produces the following unique effects.

Since the present invention includes a rotating disk having an annular V-groove and an annular member having an annular piston member and an annular V-shaped braking member, there is no need for a caliper, so the brake device can It is compact and simple, and the braking torque is generated on the side surface of the rotating disc, just like a disc brake, so it provides good feeling.Furthermore, when the V-shaped braking member or V-groove wears out, the annular member moves forward accordingly. Therefore, even if the friction surfaces wear out, there is no need to adjust the gap.

In addition, since the sliding area between the rotating disc and the V-shaped braking member can be made wider than the sliding area between the rotor and the pads in a disc brake, the braking force can be increased, and the above-mentioned wide sliding area can be made larger. Since the load per area decreases depending on the area, the degree of wear decreases.

Furthermore, since a plurality of through holes are drilled from the V-groove of the rotating disk to the outer peripheral surface, outside air flows into the through holes, which has a great cooling effect on the sliding portion of the rotating disk. Furthermore, even if water enters the V-shaped gap between the V-groove of the rotating disk and the V-shaped braking member of the annular member, the water will penetrate the V-shaped gap due to the centrifugal force caused by the rotation of the rotating disk. Since it moves toward the hole, passes through the through hole, and is discharged to the outside from the opening of the through hole, the braking force does not decrease, and good braking force is always obtained.

[Brief explanation of drawings]

FIG. 1 is a front view of a brake device according to the present invention;
FIG. 2 is a cross-sectional view taken from FIG. 1, FIG. 3 is a front view of the annular member, FIG. 4 is a cross-sectional view taken from FIG. 3, and FIG. 5 is a cross-sectional view of a conventional brake device. 2...Rotating disk, 5...V groove, 6...Through hole,
7... V-shaped braking member, 8... Annular member, 9...
Piston member, 10... hub, 10a... annular groove, 10b... engagement hole, 13... insertion hole, 14...
...Torque support member.

Claims (1)

[Claims] 1. A rotating disk with an annular V-groove on its side surface and a plurality of through holes extending from the V-groove to the outer peripheral surface;
An annular member having an annular piston member and an annular V-shaped braking member attached to the inner circumferential side of the side surface and a plurality of insertion holes bored on the outer circumferential side of the side surface, and the annular member engages with the insertion hole of the annular member. A vehicular brake device comprising a torque support member and a hub having an annular groove that engages with the annular piston member and an engagement hole that engages with the torque support member on an end surface that contacts the annular member.