JP2854526B2 - Disc brake device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc brake device for a vehicle, and more particularly to a disc brake device suitable for a high-speed railway vehicle and an automobile.

[0002]

FIG. 6 is a perspective view of a conventional disk brake device mechanism for a high-speed railway vehicle, FIG. 7 is a perspective view of a conventional brake shoe mounting device, and FIG. 8 is a relationship between a braking force and an adhesive force between a wheel and a rail. FIG. 9 is a diagram illustrating a conventional disk brake device for a high-speed rail vehicle with reference to FIGS.

In FIG. 6, reference numeral 9 denotes a wheel, 9a denotes a wheel tread, 9b denotes a disk surface, 10 denotes an axle, 11 denotes a rail, and the disk brake mount 1 mounted on a bogie frame 8
The brake levers 2 and 22 are the brake lever fulcrum 2
d, 22d, and the brake lever fulcrum 2
The d and 22d are supported by the brake lever fulcrum support bracket 3 by the brake lever receiving pins 3a.

On the other hand, the wheels 9 of the brake levers 2 and 22
Metal fitting 2a is provided at one end on the side of
, A holding bracket 4 is attached. The holding bracket 4 is provided with one brake shoe 7 per one side of the disk. A brake cylinder 5 is provided at the other end of the brake levers 2 and 22, and a return spring 6 is provided between the brake cylinder 5 and the brake lever fulcrums 2d and 22d.

In FIG. 1, when the brake cylinder 5 is operated, the pressing force P of the brake shoe 7 against the disk surface 9 b is reduced to a predetermined value by the leverage of the fulcrums 2 d and 22 d of the brake lever. It is amplified and acts on the disk surface as the braking force = 2 kPr. Here, k is a coefficient of friction between the disk surface 9b and the brake shoe 7. However, the effective braking force is converted into the braking force on the tread 9a of the wheel, and this is expressed as Q = μ shown in FIG.
-Against w. Here, Q is the adhesive force of the wheel tread 9a to the rail 11, w is the equivalent weight on the brake shaft, and μ is the coefficient of friction between the wheel and the rail 11.

FIG. 7 is a view showing the structure of the brake shoe mounting device in FIG. 6, and the mounting of the brake shoe 7 will be described with reference to FIG. A connection fitting 2a provided at one end of the wheel-side brake levers 2 and 22 is provided with a round hole 2b for mounting a brake shoe head 41. The brake shoe head 41 has a round hole on the side face of the connection fitting 2a. The rod 41a is embedded. The center of the mounting round hole 2b is located inside the side surface of the connecting fitting 2a so that the round bar of the brake head 41 does not come off.

A clearance G is formed between the side surface of the connection fitting 2a and the side surface of the brake head 41, and the brake head 41 can swing freely at a predetermined angle with respect to the connection metal 2a. It is configured to be able to exercise. The other end of the bracelet head 41 is provided with a bracelet mounting arrizo 41b, and the bracelet 7 is provided with an arimizo insertion protrusion 7a for insertion into the bracelet 41b. Further, a pad 7b is attached to the other side surface of the brake shoe 7.

The above components are connected and mounted as shown in FIG. 7, and a clearance G is secured so as not to hinder the swinging of the brake shoe head 41. Then, the connecting fitting 2a is attached to the brake levers 2, 22 shown in FIG. 6 to constitute a disc brake device.
As described above, the conventional disk brake device has a configuration in which one set of brake shoe mounting devices is provided for one side of the disk surface of the wheel, and one brake shoe is mounted on the brake shoe mounting device.

[0009]

When a vehicle running at a high speed is in normal operation, braking is applied. When the vehicle is running at a high speed, the brake is controlled by a power generation brake or an electric brake. Activated and stopped. However, when an emergency stop of a high-speed driving vehicle is performed at a high speed in a state where the electric system has failed or the power transmission has been stopped due to an earthquake or disaster, the vehicle must be stopped only by air or a hydraulic cylinder.

The present inventor has conducted a test using a high-speed braking performance test apparatus having a maximum speed of 500 km / h assuming the above-mentioned emergency case. It has been confirmed that when a braking force is applied to the conventional brake device, the brake pad 7b melts in a short time due to heat generation in the conventional disc brake device. This is because the kinetic energy of the vehicle is mainly stored as heat in the disk and the brake pad. As a method of increasing the heat capacity, the disk can be increased in thickness and radius. In some cases, the pad of the wheel cannot be easily increased in thickness from the outfitting space.

The conventional disc brake system has the above-mentioned problems. As the speed of the vehicle increases, it is an urgent task to improve the material of the brake pad and to develop a high-speed disc brake system and a brake mount device. It is becoming. SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems of the prior art, and a first object of the present invention is to provide a vehicle disk brake capable of urgently stopping a vehicle running at a high speed from a high speed. It is to provide a device.

A second object of the present invention is to dispose a plurality of pairs of brake wheels on both sides of a brake lever so that when a vehicle running at a high speed is emergency stopped, the pad is not burned out without burning out the pads. It is an object of the present invention to provide a disk brake device for a vehicle, which can prevent the occurrence of the above. A third object of the present invention is to provide a disk brake device for a vehicle that can apply pressure evenly to the entire surface of a brake shoe without causing frictional pads to hit one side.

A fourth object of the present invention is to provide a disk brake device for a vehicle which is easy to assemble and has high reliability.

[0014]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is directed to a braking device contacting both side surfaces of a wheel, a connecting metal fitting for driving each of the braking devices, and a connecting member for the connecting member. In a vehicle disk brake device comprising a drive mechanism mounted between metal fittings, at least two or more brake shoes abutting on both side surfaces of the wheel are provided on at least one side, and a connecting metal fitting is provided for mounting the brake shoe. Metal fittings
Brake lever that engages with the holding bracket of
The brake lever so that it can move freely.
And attach the brake lever to the center of the holding bracket.
Attach one end and arrange multiple pairs of brake shoes on both sides
A drive mechanism is provided at the other end of the brake lever .

According to a second aspect of the present invention, in the first aspect of the invention, two or more brake shoes provided on one side are driven by one drive mechanism. According to a third aspect of the present invention, in the first or second aspect of the present invention, the driving mechanism comprises a return spring and a cylinder.
It is also of the.

The invention according to claim 4 of the present invention relates to claims 1 and 2
Alternatively, in the invention according to claim 3, the brake shoe is mounted on a disk surface.
It is arranged on the circumference of .

The invention of claim 5 of the present invention relates to claims 1 and 2
Alternatively, in the invention according to claim 3, the brake shoe is mounted on a disk surface.
Are arranged in the radial direction .

[0018]

According to the first aspect of the present invention, a brake device is provided which is in contact with both side surfaces of a wheel, a connecting member for driving each of the brake members, and a drive mechanism provided between the connecting members. In the vehicle disc brake device, at least two brake shoes in contact with both side surfaces of the wheel are provided on at least one side, and a connection fitting is held to mount the brake shoe.
Consists of a bracket and a brake lever that engages the holding bracket
And move the brake shoe with respect to the brake lever
To the center of the holding bracket.
Attach one end of the rake lever, multiple pairs of brakes on both sides
And a drive mechanism at the other end of the brake lever.
Thus, when braking is applied, the pressure and the amount of braking heat shared by each brake pad can be reduced.
Therefore, burnout of the pad when stopping the vehicle running at high speed can be reduced, and runaway of the vehicle can be prevented. Ma
Also, balun multiple pairs of brake shoes with a pair of brake levers
The brakes can be moved smoothly when braking.
The disc surface can be brought into contact with even pressure,
Can be prevented.

According to a second aspect of the present invention, in the first aspect of the present invention, a brake shoe provided with two or more brakes on one side is provided.
Since it is configured to be driven by one drive mechanism,
The drive mechanism of the key device can be simplified. According to a third aspect of the present invention, in the first or second aspect, the driving mechanism comprises a return spring and a cylinder.
The brake device is driven by a simple mechanism.
Can be

According to a fourth aspect of the present invention, in the first, second or third aspect, the brake shoe is provided with a
Since it is arranged on the circumference of the disk surface, it joins multiple brake shoes
The frictional force can be made substantially equal.

According to the fifth aspect of the present invention ,
In the invention of claim 1, 2 or claim 3, the brake shoe is
Since it is arranged in the radial direction of the disk surface,
The structure of the metal fitting can be simplified.

[0022]

FIG. 1 is a diagram showing the overall structure of a vehicle brake system according to a first embodiment of the present invention. The embodiment of the present invention will be described with reference to FIG. In this embodiment, as shown in FIG. 1, a brake 7 that abuts on both side surfaces of the wheel 9, a connection metal X that drives each of the brakes 7, and a drive provided between the connection metal X In the vehicle disc brake device including the mechanism Y, the brakes 7 contacting both sides of the wheels 9
Are provided on at least two sides (two sets in the figure), and these brake control elements 7 are driven by one drive mechanism Y.

In FIG. 1, 9 is a wheel, 9a is a wheel tread, 9b is a disk surface, 10 is an axle, and 11 is a rail. As in the conventional example shown in FIG. Brake lever 1 and brake levers 2 and 22
Are held by the brake lever fulcrum portions 2d and 22d, and the brake lever fulcrum portions 2d and 22d are supported by the brake lever fulcrum portion support bracket 3 by the brake lever receiving pins 3a.

The connecting fitting X includes a holding fitting 4a for mounting the brake shoe 7 and a brake lever 2 which engages with the holding fitting 4a.
One end of the brake lever 2 is attached to the center part 4b of the holding bracket 4a. The same number of brake shoes 7 are provided on both sides one by one, and a drive mechanism Y including a return spring 6 and a cylinder 5 is provided at the other end of the brake lever 2.

A holding bracket 4 having a plurality of brake shoes 7 attached to a bracket 2 a provided at one end of the brake lever 2.
a are connected. In the same figure, in the circumferential direction of the disk surface 9b of the wheel 9 having the radius R, the radius r
At the angle of α ° at position 2
The brake shoe 7 is connected to the metal fitting 2a via the holding metal fitting 4a.

As will be described later, it is also possible to provide a brake shoe with a plurality of brake shoes 7 mounted in the radial direction of the disk surface. As described above, by using a plurality of brakes of the disc brake device, the pressing force on the wheel disk surface shared by each brake is reduced as compared with the conventional case, and the shared braking heat can be reduced. .

Next, a specific configuration of the brake shoe mounting device in the above-described vehicle disk brake device will be described.
2, 3, 4, and 5 are views showing first to fourth embodiments of the brake shoe mounting device. FIG. 2 shows the brake shoe mounting when the brake shoe is mounted as shown in FIG. 1. FIG. 3 is an exploded perspective view of the device, FIG. 3 is an exploded perspective view of the brake shoe mounting device when the brake shoe is arranged in the radial direction of the wheel, and FIG. 4 is an exploded perspective view showing a modification of the brake shoe mounting device of FIG. 5 is an exploded perspective view of another modified example of the brake shoe mounting device.

In FIG. 2, reference numeral 2a denotes a rectangular parallelepiped bracket provided at one end of the brake lever 2.
A vertical hole 2b is provided on the opposite surface to which the
Are provided, and the center of the round hole 2b is located inside the side surface of the metal fitting 2a. 42a is a mountain-shaped intermediate head,
An end surface 42 on the shaft is formed of two sides having OA and OB axes at an angle of θ ° with respect to the axle center direction OC with the center O as a base point.
d each form a plane perpendicular to the axis. Also,
The points A and B are the mounting center of the brake shoe 7 described later.

A round bar 42b is buried in the center of the intermediate head 42a on the line A and B. And the round bar 42b
Is located outside the above surface, and the round bar 42b is fitted into the round hole 2b of the metal fitting 2a. Also, the intermediate head 42
The surface on the opposite side of the surface in which the round bar 42b of FIG.
It is formed on a flat surface parallel to the axis of 2b and parallel to the disk surface 9b of the wheel 9, and is provided with a brake head 41 and a protrusion 42e for pressing the brake shoe 7, which will be described later.

AO, B are provided on the side of the intermediate head 42a.
A circular hole 42c is provided in the axial direction of O.
Is formed so as to be inside the above surface.
Reference numeral 41 denotes a brake head, and the brake head 41 has a rectangular parallelepiped shape, and a round bar 41a that fits into the round hole 42c of the intermediate head 42a is embedded in one surface thereof. It is located outside the mounting surface. Also, on the surface on the opposite side of the brake shoe head 41, there is provided an arimizo 41b into which a brake shoe 7 described later is fitted.

Reference numeral 7 denotes a brake shoe. The brake shoe 7 has an Arimizo insertion projection 7a on one surface, and a pad 7b of a friction plate attached to the opposite surface. The above components are assembled as follows to form a brake shoe attachment device. First, the round bar 42b of the intermediate head 42a is attached to the round hole 2b of the metal fitting 2a. Next, the round bar 41a of the brake head 41 is attached to the round hole 42c of the intermediate head 42a, and the Arimizo projection 7a of the brake shoe 7 is attached and fixed to the Arimizo 41b of the brake head. Then, in order to support each part, both end surface portions 4 of the intermediate head 42a are formed.
The holding plate 44 is fixed to 2d, and the holding plate 43 is fixed to both end surfaces 2c of the metal fitting 2a.

Here, gaps G and G1 are formed between the brake shoe head 41 and the intermediate head 42a, and between the side face of the brake shoe head 41 and the holding plate 44, respectively. The gaps G, G are provided between the head 42a and between the end faces 2c of the metal fitting 2a and the holding plate 43, respectively.
1, the brake head 41 can rotate by a predetermined angle with respect to the intermediate head 42a, and the intermediate head 42a can rotate by a predetermined angle with respect to the metal fitting 2a.

When the brake shoe mounting device constructed as described above is incorporated into the brake device shown in FIG. 1 and the cylinder 5 is driven, the brake lever 2 rotates about the fulcrum 2d, and the brake shoe 7 becomes the wheel 9 To the disk surface 9b. Here, as described above, the intermediate head 42a can be rotated by a predetermined angle with respect to the metal fitting 2a, and the brake head 41 is configured to be able to rotate by a predetermined angle with respect to the intermediate head 42a. The pad 7b of the brake shoe 7 is pressed into contact with the disk surface 9b of the wheel 9 so that pressure can be uniformly applied to the entire area of the pad 7b.

Further, since the pads 7b are arranged on the same circumference of the wheel 9 and the pads 7b are mounted at symmetrical positions with respect to the brake lever 2, the pressure applied to the two pads 7b is balanced. Can be done. Further, the round rods 42b, 41a are fitted into the round holes 2b, 42c, and the Arimizo insertion projections 7a are fitted into the Arimizo 41b, and both end surfaces 42d of the intermediate head 42a and the metal fitting 2a.
The holding plates 43, 44 are attached to both end surfaces 2c of the brake device to assemble the brake shoe mounting device. Therefore, the device can be easily assembled and can be made structurally strong. Reliability can be improved.

FIG. 3 is an exploded perspective view of the brake shoe mounting device when the brake shoe is arranged in the radial direction of the wheel. A second embodiment of the brake shoe mounting device of the present invention will be described with reference to FIG. 2, reference numeral 2a denotes the same part as the bracket shown in FIG. 2 provided at one end of the brake lever 2, and a round hole 2b is formed on the opposite surface to which the brake lever 2 is attached in the vertical direction in FIG. The center of the round hole 2b is the metal fitting 2
a is located inside the side surface.

Reference numeral 43a denotes a rectangular parallelepiped intermediate head.
A round bar 43b is embedded on the central surface of the metal fitting 3a on the side of the metal fitting 3a, and the center of the round bar 43b is located outside the above surface, and the round bar 43b is fitted into the round hole 2b of the metal fitting 2a. . The surface of the intermediate head 43a opposite to the surface on which the round bar 43b is embedded is formed as a flat surface parallel to the axis of the round bar 43b, and round holes 43c are provided at both ends thereof. The center of the hole 43c is set inside the above-mentioned surface.

Reference numeral 41 denotes a brake head and reference numeral 7 denotes a brake shoe. The brake shoe head 41 and the brake shoe 7 are composed of the same components as those shown in FIG. The above components are assembled as in FIG. 2 to form a brake shoe mounting device as follows. That is,
The round bar 43b of the intermediate head 43a is fitted into the round hole 2b of the metal fitting 2a, and the round bar 41a of the brake head 41 is attached to the round hole 43c of the intermediate head. Then, as in the embodiment of FIG. 2, the arimizo projection 7a of the brake shoe 7 is attached to and fixedly attached to the rim groove 41b of the brake shoe head. Then, to support each part, the intermediate head 4
The holding plate 44 is fixed to both end surfaces of the metal fitting 3a, and the holding plate 43 is fixed to both end surfaces of the metal fitting 2a.

Here, gaps G and G1 are formed between the brake shoe head 41 and the intermediate head 43a and between the side face of the brake shoe head 41 and the holding plate 44, respectively. Gaps G and G1 are provided between the head 43a and between both end faces of the metal fitting 2a and the holding plate 43, respectively.
Are formed, as in the embodiment of FIG.
Can rotate by a predetermined angle with respect to the intermediate head 43a, and the intermediate head 43a can rotate by a predetermined angle with respect to the metal fitting 2a.

When the brake shoe mounting device constructed as described above is incorporated in the brake device shown in FIG. 1 similarly to the first embodiment shown in FIG. 2, and the cylinder 5 is driven,
The brake lever 2 rotates about the fulcrum 2d, and the brake shoe 7 is pressed against the disk surface 9b of the wheel 9. At that time, as described above, the intermediate head 43a can be rotated by a predetermined angle with respect to the metal fitting 2a, and the brake head 41 is configured to be able to rotate by a predetermined angle with respect to the intermediate head 43a. As in the first embodiment, the pad 7b of the brake shoe 7 is pressed against the disk surface 9b of the wheel 9 so as to apply pressure uniformly to the entire area of the pad 7b.

Further, since the pads 7b are mounted at symmetric positions with respect to the brake lever 2, the pressure applied to the two pads 7b can be balanced. Further, similarly to the first embodiment shown in FIG. 2, the device can be easily assembled and structurally strong, and the reliability of the brake device can be improved.

FIG. 4 is an exploded perspective view showing a modified example of the brake shoe mounting device of FIG. 2, and a third embodiment of the brake shoe mounting device of the present invention will be described with reference to FIG. The present embodiment is different from the first embodiment shown in FIG.
It is provided in a direction perpendicular to the B axis, and a round bar of the brake head is provided corresponding to the above-mentioned round hole, and other configurations are basically the same as those of the embodiment of FIG.

In FIG. 4, at both ends of the intermediate head 52a,
A round hole 52c is provided in parallel with an end surface orthogonal to the OA axis and the OB axis.
A round bar 51a is embedded in the same direction as c. As in the first embodiment, a gap G is formed between the brake head 51 and the intermediate head 52a, so that the brake head 51 can rotate by a predetermined angle with respect to the intermediate head 52a. Have been.

Then, similarly to the first embodiment, the intermediate head 52
The round bar 51a of the brake head 51 is attached to the round hole 52c, and the Arimizo projection 7a of the brake shoe 7 is mounted and fixed to the Arimizo 51b of the brake head, and the holding plate 45 is fixed to the intermediate head 52a.
Attach and fix. In this embodiment, the same effect as that of the first embodiment can be obtained, and the round hole 2
b, since the direction of the round bar 42b and the direction of the round hole 52c and the round bar 51a are substantially perpendicular to each other, the brake shoe 7 can move in the radial direction and circumferential direction of the wheel with respect to the brake lever 2,
The disc surface 9b of the wheel allows a conforming pressure contact.

FIG. 5 is an exploded perspective view of another modified example of the brake shoe attaching device. FIG. 5 shows an embodiment in which a brake shoe is provided in the radial direction of the disk surface of the wheel, similarly to FIG. ing.
Next, a fourth embodiment of the brake shoe mounting device of the present invention will be described with reference to FIG. This embodiment is different from the second embodiment shown in FIG. 3 in that a round hole of the intermediate head is provided in parallel to the longitudinal direction of the intermediate head, and a round bar of the brake head is provided corresponding to the round hole. The other configuration is basically the same as that of the embodiment of FIG.

In FIG. 5, a round hole 53c is provided in the intermediate head 53a in parallel with the longitudinal direction, and a round bar 51a is embedded in the brake head 51 in the same direction as the round hole 53c. ing. Further, similarly to the second embodiment, a gap G is formed between the brake head 51 and the intermediate head 53a, and the brake head 51 can be rotated by a predetermined angle with respect to the intermediate head 53a. Have been.

Then, as in the second embodiment, the round bar 51a of the brake head 51 is attached to the round hole 53c of the intermediate head, and the Arimizo projection 7a of the brake shoe 7 is fixed to the Arimizo 51b of the brake head. The holding plate 46 is attached and fixed to the intermediate head 52a. In the present embodiment, the same effects as in the second embodiment can be obtained, and the round hole 2b and the round bar 4 can be obtained.
Since the direction of 2b and the direction of the round hole 53c and the round bar 51a are orthogonal to each other, the brake shoe 7 can move in the radial direction and circumferential direction of the wheel with respect to the brake lever 2, and the disc surface 9b of the wheel Adaptable pressure contact is possible.

In the above embodiment, the brake lever 2, the cylinder 5, the return spring 6, and the like are used. However, the brake lever 2, the cylinder 5, the return spring 6, and the like are replaced with a caliper cylinder unit. Can also.

[0048]

As described above, the following effects can be obtained in the present invention. At least two or more brake shoes in contact with both side surfaces of the wheel are provided on one side, and the connection fitting is attached to the brake shoe.
From the holding bracket and the brake lever that engages the holding bracket
With a degree of freedom with respect to the brake lever
Attached so that it can move, and the center of the holding bracket
Attach one end of the brake lever to the
A brake shoe is provided, and a drive mechanism is provided at the other end of the brake lever.
Therefore, when braking is applied, the pressure and the amount of braking heat shared by each brake pad can be reduced. Therefore, burnout of the pad when stopping the vehicle running at high speed can be reduced, and runaway of the vehicle can be prevented. In addition, a plurality of pairs of brake shoes are provided by a pair of brake levers.
The brakes can be operated in a well-balanced manner,
It can contact the wheel disc surface with even pressure.
And can prevent one-sided collision. A plurality of pairs of brake shoes arranged in the circumferential direction described in the preceding paragraph,
By driving with a single drive mechanism, the drive mechanism of the brake device can be simplified, and there is no increase in the weight of the drive mechanism, and there is no need to newly install a drive mechanism, so that Outfitting space can be saved. The drive mechanism consists of a return spring and a cylinder.
With this, the brake device can be driven by a simple mechanism.
Can be. By placing the brake shoe on the circumference of the disk surface
To make the frictional forces applied to multiple brake shoes approximately equal.
it can. By placing the brake shoe in the radial direction of the disk surface
To simplify the structure of the holding bracket for mounting the brake shoe
Can be.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a disc brake device according to an embodiment of the present invention.

FIG. 2 is a view showing a first embodiment of the brake shoe attachment device of the present invention.

FIG. 3 is a view showing a second embodiment of the brake shoe attachment device of the present invention.

FIG. 4 is a view showing a third embodiment of the brake shoe attachment device of the present invention.

FIG. 5 is a view showing a fourth embodiment of the brake shoe attachment device of the present invention.

FIG. 6 is a diagram showing a configuration of a conventional disc brake device.

FIG. 7 is a view showing a configuration of a conventional brake shoe attachment device.

FIG. 8 is a diagram showing a relationship between a braking force and an adhesive force between a wheel and a rail.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Disc brake stand 2, 22 Brake lever 2a Metal fitting 2b Round hole 2c Both end surfaces 2d, 22d Brake lever fulcrum 3 Brake lever fulcrum support bracket 3a Brake lever receiving pin 4, 4a Holding bracket 5 Cylinder 6 Return spring 7 Brace 7a Arimizo insertion protrusion 7b Pad 8 Vehicle bogie frame 9 Wheel 9a Wheel tread surface 9b Disk surface 10 Axle 11 Rail 41,51 Brake head 41a, 51a Round bar 41b, 51b Arimizo 42a, 52a Intermediate head holder 42b Round bar 42c, 52c 53c Round hole 42d Both end faces 42e Brace receiver 43a, 53a Intermediate head 42, 43, 44, 45, 46 Pressing plate G, G1 Gap P Brace pressing force against disc surface Pc Force of cylinder R From tread shaft to tread surface Radius from the axis on the disk surface Radius to attachment OA, OB Axial direction of mid-head chevron side OC Axle center direction OO Axle center A, B Brake shoe P / 2 pressure center point α ° Angle A-OO-O, Angle B-OO
−O θ ° Angle A-OO-OO, Angle B-O-
OO Pa Pressing force of the brake on the wheel tread F Braking force W Weight on the brake shaft Q Adhesion of the rail on the wheel tread k Coefficient of friction between the wheel and the brake u u Coefficient of friction between the wheel and the rail

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Kazuhiko Okazaki 3-8, Fukuura, Kanazawa-ku, Yokohama-shi, Kanagawa Prefecture Toyo Electric Manufacturing Co., Ltd. Yokohama office (56) References JP-A-5-126178 (JP, A) Kaihei 4-18734 (JP, U) Japanese Utility Model Showa 61-179070 (JP, U) Japanese Utility Model Showa 62-1449642 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B60T 1 / 06 B61H 1/00 B61H 5/00 F16D 55/224 102

Claims (5)

(57) [Claims] A disc brake device for a vehicle, comprising: a brake abutment on both side surfaces of a wheel; a connection fitting for driving each of the brakes; and a drive mechanism provided between the connection fittings. At least two or more brake shoes in contact with both side surfaces of the wheel are provided on one side, and a connecting metal fitting is provided with a holding metal fitting for mounting the brake shoe.
It consists of a brake lever that engages with the bracket, allowing the brake shoe to move freely with respect to the brake lever.
And hold the bracket at the center of the
Attach one end of the kiteco, and put multiple pairs of brake shoes on both sides
A disk brake device for a vehicle , wherein a drive mechanism is provided at the other end of the brake lever . 2. A disk brake device for a vehicle according to claim 1, wherein two or more brake shoes provided on one side are driven by one drive mechanism. 3. The drive mechanism comprises a return spring and a cylinder.
Configured claim 1 or vehicular disc brake according to claim 2, characterized in that the. 4. The disk brake device for a vehicle according to claim 1 , wherein the brake shoe is disposed on a circumference of the disk surface . 5. A brake shoe is provided in a radial direction of a disk surface.
Vehicular disc brake according to claim 1 or claim 3, characterized in that the.