JP3711330B2 - Disc brake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate the attachment of a disc brake device having a parking brake mechanism, and to miniaturize the disc brake device. SOLUTION: The disc brake device comprises a brake disc 3 which rotates integrally with a wheel 2, a pair of brake shoes 5, 6 for applying frictional force across the brake disc 3, a brake caliper 1 for supporting the brake shoes 5, 6 on a vehicle body, arms 30, 40 rotatably supported by the brake caliper 1, and a parking brake mechanism 20 for urging the brakes shoes 5, 6 against the brake disc 3 by turning the arms 30, 40 on the principle of a lever. The brake caliper 1 of the disc brake device and a brake release actuator 21 are integrated into a unit.

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in a disc brake device provided in a railway vehicle or the like.
[0002]
[Prior art]
Conventionally, as a disc brake device of this type, for example, as disclosed in Japanese Patent Application Laid-Open No. 10-267058, a brake disc that rotates integrally with a wheel, a brake member that imparts a frictional force across the brake disc, and the like There are those that brake the wheel.
[0003]
In addition, overseas, the disc brake device is operated as a parking brake and is used as a parking brake.
[0004]
[Problems to be solved by the invention]
However, in such a conventional disc brake device having a parking brake function, the drive mechanism that operates the disc brake device when the vehicle is stopped has a structure that is attached to the vehicle side separately from the disc brake device. However, there is a problem that it takes time to install the apparatus.
[0005]
The present invention has been made in view of the above problems, and it is an object of the present invention to facilitate the installation of the device and to make the device compact in a disc brake device having a parking brake function.
[0006]
[Means for Solving the Problems]
According to a first aspect of the present invention, there is provided a brake disc that rotates integrally with a wheel, a pair of brake members that apply frictional force across the brake disc, a brake caliper that supports the brake device on the vehicle side, and the brake caliper. A brake piston that protrudes and presses the brake against the brake disc, an arm that is rotatably supported by the brake caliper via a support pin, and parking that presses the brake against the brake disc by the lever principle by rotating this arm A brake mechanism, and the parking brake mechanism is assembled to the brake caliper, rotates the arm to rotate the brake against the brake disc, and rotates the arm against the brake spring to control the brake. From the brake release actuator that separates the wheel from the brake disc The brake release actuator includes a bottomed cylindrical cylinder tube, an end plate that closes the open end of the cylinder tube, and a piston rod that slidably penetrates the end plate. The brake caliper is movably supported, the tip end abuts against one of the brake wheels, the base end is pivotally connected to the cylinder tube of the brake release actuator, and the other arm is pivotally connected to the brake caliper. Supported, the distal end abuts against the other restrictor, the proximal end is pivotally connected to the piston rod of the brake release actuator, and the support pin can be displaced to any position in the longitudinal direction of the arm. It is supported by the brake caliper .
[0009]
According to a second invention, in the first invention, the brake caliper includes a flange portion connected to the vehicle side, a pair of yoke portions extending so as to sandwich the brake disk, and a base end portion connecting the flange portion and the yoke portion. And a through hole through which the brake release actuator is inserted is formed in the base end portion.
[0010]
According to a third invention, in the first or second invention, the arm has a support hole through which the support pin passes, and the support hole is formed in a long hole shape in the longitudinal direction of the arm, and the support A bracket for fixing a pin to the brake caliper is provided, the bracket is fixed to the brake caliper by a bolt, and a bolt hole of the bracket is formed in a long hole shape in the longitudinal direction of the arm ; did.
[0011]
According to a fourth invention, in any one of the first to third inventions, the brake release actuator is operated by an air pressure guided from a suspension air spring of the vehicle.
[0012]
According to a fifth invention, in any one of the first to fourth inventions, a plurality of brake springs are interposed in parallel to the brake release actuator.
[0013]
Operation and effect of the invention
According to the first invention, the brake piston protrudes from the brake caliper during braking during operation, and the brake is pressed against the brake disc to apply a frictional force to brake the wheel.
[0014]
When the vehicle is stopped, the parking brake mechanism rotates the arm, and the brake is pressed against the brake disc by the lever principle to apply a frictional force to brake the wheel.
In addition, the brake release actuator rotates the arm against the brake spring during non-braking during operation, and does not interfere with the movement of the brake due to the operation of the brake piston. When the operation of the brake release actuator is released when the vehicle is stopped, the arm is rotated by the urging force of the brake spring, and the brake is pressed against the brake disc to apply a frictional force to brake the wheel.
Due to the structure in which the parking brake mechanism is assembled to the brake caliper, the device can be made compact. Since the brake caliper and the brake release actuator are unitized, the parking brake mechanism can be attached to the carriage body together with the brake caliper, and the device can be easily attached.
[0018]
According to the second invention , since the through hole through which the brake release actuator is inserted is formed at the base end portion of the brake caliper, the weight of the brake caliper can be reduced and the rigidity of the brake caliper can be secured.
[0019]
According to the third invention , the mounting position of the support pin with respect to the brake caliper and the arm can be arbitrarily adjusted according to the pressing force and the stroke required for the arm turning tip.
[0020]
According to the fourth aspect of the invention , the brake release actuator is automatically operated as the pressure of the suspension air spring is increased while the train is running, and the operation of the parking brake mechanism is released. When the air pressure of the suspension air spring is released when the vehicle is stopped, the air pressure of the brake release actuator is released and the wheel can be braked. There is no need to provide a new air pressure source for supplying pressurized air to the brake release actuator, and the structure can be simplified.
[0021]
According to the fifth aspect of the invention , it is possible to ensure the urging force of the brake spring while suppressing the space for interposing the brake spring.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0023]
As shown in FIG. 1, the disc brake device includes a brake disc 3 formed on a side portion of the wheel 2, left and right brake members 5 and 6 that apply frictional force across the brake disc 3, and left and right brake members. A brake caliper 1 that supports the main body (vehicle), not shown, and a brake piston 7 that protrudes from the brake caliper 1 and presses the left and right brake members 5 and 6 against the brake disc 3. A brake release spring unit 8 that biases the left and right brake members 5 and 6 away from the brake disc 3 is provided.
[0024]
As shown in FIG. 2, the brake caliper 1 includes a flange portion 11 that is fastened to a cart body (not shown), left and right yoke portions 12 and 13 that extend so as to sandwich the brake disk 3 of the wheel 2, and the flange portion 11. And a base end portion 14 connecting the yoke portions 12 and 13 and these are integrally formed. Two brake pistons 7 and two brake release spring units 8 are respectively supported on the left and right yoke portions 12 and 13.
[0025]
The disc brake device brakes the left and right arms 30 and 40 supported by the brake caliper 1 and the left and right brake members 5 and 6 mainly by lever principle when the vehicle is stopped. A parking brake mechanism 20 that presses against the disc 3 is provided. The parking brake mechanism 20 rotates the arms 30 and 40 and rotates the arms 30 and 40 against the brake spring, which will be described later, and presses the brake members 5 and 6 against the brake disc 3. A brake release actuator 21 that separates the left and right brake members 5 and 6 from the brake disk 3 is provided.
[0026]
As shown in FIG. 4, the brake release actuator 21 includes a cylindrical cylinder tube 22, a piston 23 that is slidably fitted inside the cylinder tube 22, and an open end of the cylinder tube 22 that closes the opening end of the cylinder 23. An end plate 28 defining a pneumatic chamber 27 therebetween, and a piston rod 29 connected to the piston 23 and slidably penetrating the end plate 28 are provided. A dust boot 19 is interposed between the end plate 28 and the piston rod 29.
[0027]
In FIG. 4, 52 is a suspension air spring that supports the vehicle body on a cart (not shown). The pneumatic chamber 27 communicates with the suspension air spring 52 via the switching valve 51. Pressurized air is supplied from the air pressure source 53 to the suspension air spring 52 and the air pressure chamber 27 when traveling, and atmospheric pressure is guided when the vehicle stops. For this reason, the disc brake device can be operated when the electric system expires. Moreover, you may prepare for the time of an electric system's expiration etc. as a structure by which the atmospheric pressure is guide | induced to the pneumatic chamber 27 even if it drive | works by operating the switching valve 51. FIG.
[0028]
A first brake spring 25 and a second brake spring 26 are built in the brake release actuator 21 as brake springs constituting the parking brake mechanism 20 described above. The first brake spring 25 and the second brake spring 26 are formed in a coil shape, and are compressed between the bottom 24 of the cylinder tube 22 and the piston 23, and are arranged in parallel in the cylinder tube 22 in parallel. Is done. The first brake spring 25 and the second brake spring 26 cause the piston rod 29 to protrude by their respective urging forces, and rotate the arms 30 and 40 to press the brake members 5 and 6 against the brake disc 3.
[0029]
As shown in FIG. 1, the left arm 30 includes an arm support hole 32 that is rotatably supported via a support pin 31, an arm rotation tip 33 that abuts against the back of the control wheel 5, and a brake release actuator. 21 has an arm base end portion 34 connected to an end portion of the 21 piston rod 29 via a pin 35.
[0030]
The right arm 40 includes an arm support hole 42 that is rotatably supported via a support pin 41, an arm rotation tip portion 43 that contacts the back portion of the control wheel 6, and an end of the cylinder tube 22 of the brake release actuator 21. And an arm base end portion 44 connected to the portion via a pin 45.
[0031]
As shown in FIG. 3, the support pin 41 is fixed to the brake caliper 1 via brackets 16 and 17. The support pin 41 is rotatably fitted in the arm support hole 47 via the bush 46. Note that the arm 30 of the left parking brake mechanism has the same support structure as the arm 40. That is, for the left and right arms 30 and 40, the support pins 31 and 41 are the fulcrums, the arm rotation tip portions 33 and 43 are the action points, and the pins 35 and 45 that are the connection points with the brake release actuator 21 are the It is a key point (see Fig. 1).
[0032]
Further, a brake release actuator 21 is provided through the base end portion 14 of the brake caliper 1, and the parking brake mechanism 20 is assembled to the brake caliper 1, and both are unitized.
[0033]
Next, a through hole 18 through which the brake release actuator 21 is inserted is formed in the base end portion 14 of the brake caliper 1. The through hole 18 is provided so as not to interfere with the behavior of the brake release actuator 21.
[0034]
In the plan view of FIG. 1, the brake release actuator 21 is disposed between the flange portion 11 fastened to the carriage body side of the brake caliper 1 and the left and right yoke portions 12 and 13 extending so as to sandwich the brake disk 3 of the wheel 2. Be placed.
[0035]
The brake release actuator 21 is disposed in parallel with the stroke direction of the brake piston 7, and the arms 30 and 40 are disposed along the brake caliper 1, so that the device can be made compact.
[0036]
Next, the operation of the embodiment of the present invention configured as described above will be described.
[0037]
Each brake piston 7 is projected from the brake caliper 1 by the hydraulic pressure guided through the pipe 9 during braking during operation, and the left and right brake members 5 and 6 are pressed against the brake disc 3 to give a frictional force. Brake.
[0038]
A brake spring (not shown) built in the brake release spring unit 8 separates the left and right brake members 5 and 6 from the brake disc 3 by the biasing force during non-braking during operation. At this time, pressurized air is introduced into the brake release actuator 21 and contracts, and the distal end portions 33 and 43 of the left and right arms 30 and 40 are separated from the control members 5 and 6, and the brake piston 7 is operated by the operation. It does not interfere with the movement of the wheels 5 and 6.
[0039]
As the air pressure of the suspension air spring 52 is released when the vehicle stops, the air pressure of the brake release actuator 21 is released. Along with this, the brake release actuator 21 is extended by the urging force of the first brake spring 25 and the second brake spring 26, and the left and right arms 30 and 40 rotate about the support pins 31 and 41, respectively. The control members 5 and 6 with which the tip portions 33 and 43 abut are pressed against the brake disc 3 to apply a frictional force and brake the wheel 2.
[0040]
Due to the structure in which the air pressure chamber 27 of the brake release actuator 21 communicates with the air pressure source 53 common to the suspension air spring 52, the brake release actuator 21 automatically expands as the pressure of the suspension air spring increases when the train is running, and the parking brake mechanism. The operation of 20 is released. As a result, it is not necessary to newly provide a pneumatic pressure source for supplying pressurized air to the brake release actuator 21, and the structure can be simplified.
[0041]
Since the brake caliper 1 and the parking brake mechanism 20 of the disc brake device are unitized by a structure in which the brake release actuator 21 is inserted through the base end portion 14 of the brake caliper 1, the brake release actuator 21 together with the brake caliper 1 is provided. Can be attached to the cart body. And when attaching the disc brake apparatus provided with the parking brake mechanism 20 which concerns on this invention to a trolley | bogie, a design change with respect to a trolley | bogie is not required but implementation can be performed easily.
[0042]
Since the brake release actuator 21 is disposed between the flange portion 11 and the yoke portions 12 and 13 of the brake caliper 1, the device can be made compact.
[0043]
Since the through hole 18 through which the brake release actuator 21 is inserted is formed in the base end portion 14 of the brake caliper 1, the brake caliper 1 can be reduced in weight and the rigidity of the brake caliper 1 can be secured.
[0044]
The length between the support pins 31 and 41 and the pins 35 and 45 of the arms 30 and 40 is limited by the structure in which the brake release actuator 21 is inserted into the base end portion 14 of the brake caliper 1. In response to this, since the coil-shaped first brake spring 25 and second brake spring 26 are interposed in parallel in the brake release actuator 21, the arm turning front end portions 33, 43 are connected to the brake members 5, 6. Enough work force can be secured.
[0045]
As another embodiment, as shown in FIG. 5, a fulcrum position adjusting mechanism 60 that adjusts the mounting position of the support pin 41 with respect to the brake caliper and the arm 40 may be provided.
[0046]
The arm 40 has an arm support hole 48 that is rotatably supported via a support pin 41, and the support pin 41 supports the arm 40 so as to be slidable in the longitudinal direction.
[0047]
The brackets 16 and 17 for fixing the support pin 41 to the brake caliper are fastened to the brake caliper via bolts (not shown). As the fulcrum position adjusting mechanism 60, the bolt holes 61 and 62 of the brackets 16 and 17 are formed in a long hole shape, and the position of the support pin 41 with respect to the brake caliper can be adjusted in the longitudinal direction of the arm 40.
[0048]
The left and right arms 30 and 40 have support pins 31 and 41 as fulcrums, arm rotation tip portions 33 and 43 as action points, and pins 35 and 45 as force points. For this reason, if the distance between the support pins 31 and 41 of the arms 30 and 40 and the pins 35 and 45 is increased, the force acting on the control members 5 and 6 from the arm rotation tip portions 33 and 43 increases.
[0049]
In the present embodiment, the mounting position of the support pin 41 with respect to the brake caliper and the arm 40 is adjusted, and the pressing force and stroke required for the arm turning tip are arbitrarily set.
[0050]
As another embodiment, the brake release actuator may be constituted by a hydraulic cylinder or an electric actuator.
[0051]
The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.
[Brief description of the drawings]
FIG. 1 is a plan view of a disc brake device showing an embodiment of the present invention.
FIG. 2 is a side view of the same.
3 is a cross-sectional view taken along the line DD in FIG.
FIG. 4 is a cross-sectional view of the brake release actuator.
FIG. 5 is a perspective view of a fulcrum position adjusting mechanism showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Brake caliper 2 Wheel 3 Brake disc 4 Brake disc 5 Brake disc 6 Brake disc 7 Hydraulic piston 8 Brake release spring unit 11 Flange part 12 Yoke part 13 Yoke part 14 Base end part 20 Parking brake mechanism 21 Brake release actuator 30 Arm 31 Support Pin 40 arm 41 support pin 60 fulcrum position adjustment mechanism

Claims (5)

A brake disc that rotates integrally with the wheel;
A pair of brake members that impart frictional force across the brake disc,
A brake caliper that supports the control on the vehicle side;
A brake piston that protrudes from the brake caliper and presses the brake against the brake disc;
An arm rotatably supported by a brake caliper via a support pin ;
A parking brake mechanism that rotates this arm and presses the brake against the brake disc according to the lever principle,
With
The parking brake mechanism is assembled to the brake caliper,
A brake spring that rotates the arm and presses the brake against the brake disc;
It consists of a brake release actuator that rotates the arm against this brake spring to separate the brake from the brake disc,
The brake release actuator includes a bottomed cylindrical cylinder tube, an end plate that closes the open end of the cylinder tube, and a piston rod that slidably penetrates the end plate,
One arm is pivotally supported by the brake caliper, the tip is in contact with one of the brake wheels, and the base end is pivotally connected to the cylinder tube of the brake release actuator,
The other arm is pivotally supported by the brake caliper, the tip is in contact with the other brake, the base end is pivotally connected to the piston rod of the brake release actuator,
The disc brake device , wherein the support pin is supported by the brake caliper so as to be displaceable to an arbitrary position in the longitudinal direction of the arm with respect to the arm . The brake caliper is
A flange connected to the vehicle side;
A pair of yoke portions extending so as to sandwich the brake disc;
A base end portion connecting the flange portion and the yoke portion,
The disc brake device according to claim 1, wherein a through hole through which the brake release actuator is inserted is formed in the base end portion . The arm has a support hole through which the support pin passes, and the support hole is formed in a long hole shape in the longitudinal direction of the arm,
A bracket for fixing the support pin to the brake caliper is provided, the bracket is fixed to the brake caliper by a bolt, and a bolt hole of the bracket is formed in a long hole shape in the longitudinal direction of the arm. The disc brake device according to claim 1 or 2. The disc brake device according to any one of claims 1 to 3, wherein the brake release actuator is configured to be operated by an air pressure guided from a suspension air spring of a vehicle . The disc brake device according to any one of claims 1 to 4, wherein a plurality of the brake springs are interposed in parallel with the brake release actuator .

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