JP6777293B2 - Floating caliper brake device for railway vehicles - Google Patents

Description

The present invention is, for example, a floating type caliper brake device for railroad vehicles that applies braking force by directly pressing a brake shoe with a piston to the outer side surface of a brake disc integrally attached to both side surfaces of a wheel. It is related to the caliper brake device of.

In order to prevent the railroad vehicle from rolling when moored, it has been common practice to insert a wedge-shaped device called a chock between the rail and the wheel.

However, with the overseas expansion of high-speed railway vehicles, it has become required to add a parking brake to the braking device as a means for preventing the railway vehicle from rolling when moored.

By the way, there are two types of brake devices for railway vehicles: a caliper type in which the piston directly presses the brake shoes, and a lever type in which the brake shoes are pressed via a link mechanism. Of these, the caliper brake device in which the piston directly presses the brake shoes includes an opposed type in which the pistons are arranged on each of the brake shoes (for example, Patent Document 1) and a piston arranged on only one of the brake shoes. There is a floating type (for example, Patent Document 2).

Of these, the one in which the parking brake is added to the opposed type caliper brake device has already been disclosed in Patent Document 3. The brake device described in Patent Document 3 rotatably supports an arm on a caliper body installed on a carriage via a support frame, and by rotating this arm, the tip of the caliper body is based on the principle of leverage. The structure is such that the brake shoes supported by the part are pressed against the brake disc.

The brake device described in Patent Document 3 is easy to install a parking brake and can be made compact, but there is a space for installing the rotating tip of the arm between each of the two pistons that press the brake shoes. This is possible because it is an existing opposed type caliper brake device.

On the other hand, in the floating caliper brake device, since two clearance adjusting devices are arranged between the two pistons that press the brake shoes, the rotation of the arm for pressing the brake shoes. It is difficult to secure a space to install the tip.

Therefore, when the arm structure of the brake device described in Patent Document 3 is adopted as it is in the floating caliper brake device, it is necessary to change the arrangement of the piston, the clearance adjusting device, etc., which are important for the braking performance, which greatly affects the braking performance. Is a concern.

In addition, since the floating caliper brake device has a hydraulic oil piping port at a position of the caliper body that serves as a fulcrum of the arm, the fulcrum of the arm should be arranged outside the hydraulic oil piping port provided on the caliper body. As a result, the width of the caliper body increases, which hinders the mountability on the trolley.

Japanese Unexamined Patent Publication No. 8-226471 Japanese Unexamined Patent Publication No. 8-226467 JP-A-2002-235780

The problem to be solved by the present invention is that the parking brake of the braking device described in Patent Document 3 cannot be adopted as it is in the floating caliper braking device due to the structural limitation, and the improvement in the brake shoe pressing position is improved. Is necessary.

An object of the present invention is to add a parking brake that prevents a railroad vehicle from rolling when moored to a floating caliper brake device without affecting the braking performance.

In order to achieve the above object, the floating caliper brake device for railway vehicles of the present invention is used.
The support frame to be installed on the dolly and
The base end side is fitted into the support pin so that the support frame can be freely reciprocated along the support pin installed so as to be parallel to the axial direction of the wheel, and the tip end side is located outside the outer peripheral side surfaces of the wheel. The caliper body, which is branched into two parts,
A brake shoe supported inside the tip of the caliper body, which is branched into two, and a brake shoe.
Two pistons arranged at one tip of the caliper body to press these brake shoes against the brake disc attached integrally with the wheel,
A gap adjusting device arranged between these two pistons,
It is a floating caliper brake device equipped with
A parking brake cylinder device installed on the base end side of the caliper body and
The base end is rotatably attached to the end of the parking brake cylinder device on the rod protruding side, and the tip is centered on a fulcrum on the wheel side with respect to the axial direction of the wheel from the hydraulic oil piping port provided in the caliper body. With a brake lever that presses the one brake shoe on the side where the piston is placed,
The most important feature is that it is equipped with a parking brake.

In the floating caliper brake device for railroad vehicles of the present invention, since the fulcrum of the brake lever is on the wheel side with respect to the axial direction of the wheel with respect to the hydraulic oil pipe port provided in the caliper main body, the brake lever can be miniaturized. In addition, the width of the caliper body is increased, and the mountability on the trolley is not hindered.

In the present invention, a pressing member is installed at the tip of the brake lever to form three pressing portions whose pressing height position matches the step of the pressed surface of the brake shoe, and the three pressing members of the pressing member. If the brake shoes are pressed by the pressing portion, it is not necessary to change the arrangement of the piston, the clearance adjusting device, etc., which are important for braking performance.

In the present invention
A cylinder, a piston arranged in the cylinder, and a rod provided integrally with the piston and whose tip end side is located outside one end surface of the cylinder are provided.
A push rod was inserted into the outer periphery of the tip end side of the rod, and a state in which a ball arranged in a hole provided in the push rod was fitted in a circumferential recess provided in the rod was inserted into the outer periphery of the push rod. In a state where the push rod is connected to the rod by holding it with a holding portion formed on the inner peripheral portion of the holding member,
By exhausting the compressed air on the side where the rod in the cylinder exists, the rod is projected from the cylinder via the piston by the urging force of the compression spring arranged on the side where the rod in the cylinder does not exist, and the parking brake Of the parking brake device that gains power
A position relative to the push rod in order to release the parking braking force by pulling out the ball from the circumferential recess of the rod to release the connection between the two and increasing the amount of the push rod inserted into the rod. When the pull rod for moving the holding member is guided to the anti-rod protruding side of the cylinder through the guide support provided in the cylinder,
Even when the rod, push rod, and holding member are located in the center of the trolley in the width direction, the release operation can be manually performed from the side surface direction of the trolley.

In the present invention, the brake lever is miniaturized with the fulcrum as the wheel side in the axial direction of the wheel with respect to the hydraulic oil pipe port provided in the caliper body. Therefore, even if a parking brake is added, the size of the conventional floating caliper brake device can be reduced. It can be maintained and does not interfere with the mountability on the trolley.

In addition, if the pressing height positions of the three pressing parts of the pressing member installed at the tip of the brake lever match the step on the pressed surface of the brake shoe, the piston, clearance adjusting device, etc., which are important for braking performance, can be used. No need to change the layout. Therefore, it can be made compatible with the conventional floating caliper brake device and can be easily replaced with the conventional floating caliper brake device.

It is a top view of the floating caliper brake device for a railroad vehicle of this invention. It is a front view of FIG. It is a rear view of FIG. It is a figure which took out and showed the parking brake added to the floating caliper brake device for a railroad vehicle of this invention from FIG. It is a figure which looked at the brake shoe pressing side part of FIG. 4 from the side view. It is an enlarged view of the brake shoe pressing side part of FIG. 4A and 4B are views showing the configuration of the parking brake, in which FIG. 4A shows a loosened position, FIG. 4B shows a parking brake position, and FIG. 4C shows a state after manual release.

The purpose of the present invention is to add a parking brake that prevents the rolling vehicle from rolling when moored to the floating caliper brake device, and the wheel shaft is more than the hydraulic oil pipe port provided with the fulcrum of the brake lever on the caliper body. This was achieved by setting the direction to the wheel side.

Hereinafter, an example for carrying out the present invention will be described with reference to FIGS. 1 to 7.
Reference numeral 1 denotes a floating caliper brake device of the present invention in which the caliper main body moves in the axial direction of the wheels, and is configured as described below.

Reference numeral 2 denotes a caliper main body formed in two branches so that the tip side is located on the outside of both outer peripheral surfaces of the wheel 3, and the two support pins 6a and 6b attached to the support frame 5 fixed to the carriage 4 The base end side of the wheel 3 is attached to the support frame 5 so that the wheel 3 can freely slide in the axial direction along the wheel 3.

Reference numerals 7a and 7b are two hydraulic pistons supported on both sides of the wheel 3 in the circumferential direction at the tip of one of the two branches of the caliper body 2, and the rods of these hydraulic pistons 7a and 7b. A brake shoe 8a is installed at the end.

Reference numerals 9a and 9b are two clearance adjusting devices installed between the two hydraulic pistons 7a and 7b at one tip of the caliper body 2, and the brake disc 10 is integrally attached to the wheel 3. It is a device that automatically adjusts the gap between the brake shoe 8a and the brake shoe 8a.

On the other hand, the brake shoes 8b are directly supported inside the other tip facing the one tip of the caliper body 2, and the hydraulic pistons 7a and 7b for pressing the brake shoes 8b against the brake disc 10 are not installed. ..

Reference numeral 11a is an upper receiving member for holding the brake shoes 8a and 8b from the upper end portion, and 11b is a lower receiving member for holding the brake shoes 8a and 8b from the lower end portion, respectively, which are installed at the branched tip portions of the caliper main body 2. Will be done.

Further, reference numeral 2a is a hydraulic oil piping port provided in the central portion of the caliper main body 2 on the installation side of the hydraulic pistons 7a and 7b, and the hydraulic oil supplied from the hydraulic oil piping port 2a passes through the through hole 2b. Is supplied to the hydraulic pistons 7a and 7b.

In the floating caliper brake device 1 having the above configuration, hydraulic oil is supplied to the hydraulic pistons 7a and 7b to project the rod, so that the brake shoe 8a supported by one tip of the caliper body 2 is attached to the brake disc 10. Be pressed.

When the brake shoe 8a is pressed against the brake disc 10, the caliper body 2 moves along the support pins 6a and 6b in the direction in which the brake shoe 8a separates from the wheel 3, while the other tip of the caliper body 2 moves. The brake shoe 8b supported by the brake shoe 8b moves in a direction approaching the brake disc 10. Finally, the brake discs 10 are pressed from both sides by the two brake shoes 8a and 8b.

In the present invention, a parking brake having the following configuration is added to the floating caliper brake device 1.

Reference numeral 12 denotes a parking brake cylinder device in which a rod 22 protruding from the cylinder 21 moves back and forth by supplying air, and the two support pins installed in the height direction of the railroad vehicle on the base end side of the caliper main body 2. It is installed between 6a and 6b.

In the parking brake cylinder device 12, the inside of the cylinder 21 is partitioned by a piston 23 in a spring chamber 24 and a pressure chamber 25 while maintaining airtightness, and the rod 22 is projected by a compression spring 26 arranged in the spring chamber 24. It is gaining momentum.

The movement of the piston 23 to the spring chamber 24 side is carried out from the wall surface 21a on the spring chamber 24 side of the cylinder 21 to the pressure chamber 25 side at the stepped portion 23b of the shaft-shaped portion 23a projecting to the side opposite to the rod 22 of the piston 23. It is regulated by abutting the tip surface of the protruding tubular portion 21b. In the example of FIG. 7, the shaft-shaped portion 23a is slidably supported inside the tubular portion 21b.

Reference numeral 27 denotes a tubular push rod that is movably inserted around the outer periphery of the tip of the rod 22. A plurality of holes 27a are provided on the base end side of the push rod 27, and the balls 28 inserted into the holes 27a are fitted into the circumferential recess 22a formed on the tip end side of the rod 22 to form the rod 22. The push rods 27 are connected.

Reference numeral 29 denotes a tubular holding member inserted into the outer periphery of the push rod 27 in order to hold the ball 28 fitted in the circumferential recess 22a. The other end of the holding member 29 is formed so as to be in contact with the convex peripheral edge 27b formed on the outer periphery of the push rod 27, and the inner peripheral surface of the holding member 29a is located directly above the ball 28 at the time of the connection. It is urged by a spring 30 provided inside the holding member 29 as described above. Further, the area from the inner peripheral portion on one end side of the holding member 29 to the holding portion 29a is formed so as to be a relief portion 29b of the ball 28.

Reference numeral 31 denotes a lever rotatably installed on one end side of the mounting portion 32 fixed to the holding member 29 by using a pin 33, and a pull rod 35 connected to the other end of the lever 31 via a pin 34. Is guided to reach the wall surface 21a on the spring chamber 24 side of the cylinder 21.

Then, slight dents 35a and 35b are formed at two locations in the longitudinal direction of the pull rod 35, and these dents 35a and 35b are separately painted with two kinds of paints in order to separate them.

Of these, the recess 35a (first display unit) farther from the pin 34 is located below the end surface of the cylinder 21 on the spring chamber 24 side at the loosened position when the parking brake is released as shown in FIG. 7A. The position is determined so that it can be confirmed that it is a loosened position.

Further, when the recess 35b (second display portion) closer to the pin 34 is in the loosened position shown in FIG. 7A, one end thereof is a guide support 21c of the pull rod 35 provided on the outer peripheral portion of the cylinder 21. For example, the position is determined so as to be located on the outside of the guide support 21 c at the time of the parking brake shown in FIG. 7 (b) while matching the end surface on the rod side. By determining the position of the recess 35b in this way, the piston stroke amount L during the parking brake can be measured by measuring the distance between, for example, the rod side end surface of the guide support 21c and one end of the recess 35b during the parking brake. become.

With such a configuration, as shown in FIG. 1, even when the rod 22, the push rod 27, and the holding member 29 are located at the center in the width direction of the carriage, they will be described below from the side surface direction of the carriage. , You will be able to manually release.

That is, in the parking brake cylinder device 12 having the above configuration, when the railroad vehicle is moored, compressed air is exhausted from the pressure chamber 25 at the loosened position in FIG. 7A, as shown in FIG. 7B. , The push rod 27 is integrally projected with the rod 22 by the urging force of the compression spring 26.

Due to the protrusion of the push rod 27, one of the brake shoes 8a moves toward the brake disc 10, and as a result, the railroad vehicle sandwiches the brake discs 10 attached to both side surfaces of the wheels 3 between the two brake shoes 8a and 8b. It becomes a parking brake state that does not roll.

At that time, the following brake lever 13 is adopted in the present invention as a means for transmitting the protrusion of the push rod 27 of the parking brake cylinder 12 to one brake shoe 8a.

That is, the base end portion 13a of the brake lever 13 is rotatably attached to the end portion of the push rod 27 of the parking brake cylinder device 12. Then, the tip portion 13b is moved in the direction opposite to the protruding direction of the push rod 27 by the protrusion of the push rod 27, and the central portion is pressed so as to press one of the brake shoes 8a on the side on which the hydraulic pistons 7a and 7b are arranged. A fulcrum 13c is provided in. In the present invention, the fulcrum 13c of the brake lever 13 is on the wheel side with respect to the axial direction of the wheel with respect to the hydraulic oil piping port 2a provided in the caliper main body 2.

By providing the fulcrum 13c of the brake lever 13 on the wheel side in the axial direction of the wheel with respect to the hydraulic oil pipe port 2a provided in the caliper main body 2 in this way, the brake lever 13 can be miniaturized and a parking brake is added. However, the size of the conventional floating caliper brake device can be maintained, and the mountability on the bogie 4 is not hindered.

Further, in the embodiment, the pressing member 15 is held via the spherical seat 14 installed at the tip end portion 13b of the brake lever 13, and the three-point pressing portions 15a to 15c formed on the pressing member 15 hold the brake shoe 8a. Shows what is pressed.

At that time, the braking performance is improved by matching the pressing height positions of the pressing portions 15a to 15c at the three points with the step on the pressed surface (the side opposite to the contact surface with the brake disc 10) of the brake shoe 8a. Stable pressing is possible without changing the arrangement of the important hydraulic pistons 7a and 7b and the clearance adjusting devices 9a and 9b. This stable pressing becomes more remarkable by interposing the spherical seat 14.

According to such an embodiment, compatibility with the conventional floating caliper brake device can be provided, and it becomes possible to easily replace the conventional floating caliper brake device.

On the other hand, when the spherical seat 14 is interposed, the pressing member 15 is rotationally shaken when the vehicle is traveling. Therefore, in order to prevent the rotational fluctuation of the pressing member 15, in the embodiment, the pin 16 is passed through the pressing member 15, and the penetrating pin 16 is provided in the through portion of the pin 16 of the brake lever 13. It is inserted in 13d. By installing such a detent, the degree of freedom in the rotation direction of the wheel is suppressed so that the pressing member 15 does not rotate and shake.

When manually releasing the parking brake from the parking brake position shown in FIG. 7B, the operator pulls the pull rod 35 in the direction opposite to the protruding direction of the rod 22, and one end of the lever 31 is used as a fulcrum. Rotate the side.

As a result, the claw portion 31a formed on one end side of the lever 31 pushes the convex portion 27c formed on the outer peripheral surface of the push rod 27 toward the cylinder 21, and the holding member 29 is pushed against the urging force of the spring 30. The holding member 29 is moved toward the 27c side so that the ball 28 comes out of the circumferential recess 22a of the rod 22 and is located at the retracted position (see FIG. 7C). If the position of the pull rod 35 is confused with the loosening position shown in FIG. 7A after the parking brake is manually released, it can be confirmed by checking whether the pull rod 35 moves easily.

It goes without saying that the present invention is not limited to the above-mentioned example, and the embodiment may be appropriately changed as long as it is within the scope of the technical idea described in each claim.

1 Floating caliper brake device 2 Caliper body 2a Hydraulic oil pipe port 3 Wheel 4 trolley 5 Support frame 6a, 6b Support pin 7a, 7b Hydraulic piston 8a, 8b Brake shoe 9a, 9b Gap adjustment device 10 Brake disc 12 Parking brake cylinder device 13 Brake shoes 13a Base end 13b Tip 13c fulcrum 14 Spherical seat 15 Pressing member 15a to 15c Pressing part 16 pin 21 Cylinder 21c Guide support 22 Rod 22a Circumferential recess 23 Piston 26 Compression spring 27 Push rod 27a Hole 28 Ball 29 Member 29a Holding part 35 Pull rod 35a, 35b Recess

Claims (6)

The support frame to be installed on the dolly and
The base end side is fitted into the support pin so that the support frame can be freely reciprocated along the support pin installed so as to be parallel to the axial direction of the wheel, and the tip end side is located outside the outer peripheral side surfaces of the wheel. The caliper body, which is branched into two parts,
A brake shoe supported inside the tip of the caliper body, which is branched into two, and a brake shoe.
Two pistons arranged at one tip of the caliper body to press these brake shoes against the brake disc attached integrally with the wheel,
A gap adjusting device arranged between these two pistons,
It is a floating caliper brake device equipped with
A parking brake cylinder device installed on the base end side of the caliper body and
The base end is rotatably attached to the end of the parking brake cylinder device on the rod protruding side, and the tip is centered on a fulcrum on the wheel side with respect to the axial direction of the wheel from the hydraulic oil piping port provided in the caliper body. With a brake lever that presses the one brake shoe on the side where the piston is placed,
A floating caliper brake device for rail vehicles, characterized by having a parking brake. The railway according to claim 1, wherein a pressing member having three points of pressing is installed at the tip of the brake lever, and the three pressing parts of the pressing member are pressed against the brake shoe. Floating caliper brake device for vehicles. The floating caliper brake device for a railway vehicle according to claim 2, wherein the pressing height positions of the three pressing portions are matched with the steps of the pressed surfaces of the pressing portions of the brake shoes. The floating caliper brake device for a railway vehicle according to claim 2 or 3, wherein the pressing member spherically supports the tip of the brake lever while providing a detent for the pressing member. The parking brake cylinder device
A cylinder, a piston arranged in the cylinder, and a rod provided integrally with the piston and whose tip end side is located outside one end surface of the cylinder are provided.
A push rod was inserted into the outer periphery of the tip end side of the rod, and a state in which a ball arranged in a hole provided in the push rod was fitted in a circumferential recess provided in the rod was inserted into the outer periphery of the push rod. In a state where the push rod is connected to the rod by holding it with a holding portion formed on the inner peripheral portion of the holding member,
By exhausting the compressed air on the side where the rod in the cylinder exists, the rod is projected from the cylinder via the piston by the urging force of the compression spring arranged on the side where the rod in the cylinder does not exist, and the parking brake A parking brake device that gains power
A position relative to the push rod in order to release the parking braking force by pulling out the ball from the circumferential recess of the rod to release the connection between the two and increasing the amount of the push rod inserted into the rod. The railway according to any one of claims 1 to 4, wherein a pull rod for moving the holding member is guided to the anti-rod protruding side of the cylinder through a guide support provided in the cylinder. Floating caliper brake device for vehicles. The first display unit is provided at a position below the end surface of the pull rod on the anti-rod protruding side of the cylinder when the parking brake is released, and the end surface of the guide support provided on the cylinder is provided at the loosened position. The floating caliper brake device for a railroad vehicle according to claim 5, wherein a second display unit is provided at a position outside the guide support during parking braking while one end coincides with the cylinder.

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