JP3806823B2 - Unit brake - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a unit brake for a railway vehicle or the like.
[0002]
[Prior art]
FIG. 6 shows an example of a conventional unit brake described in Japanese Utility Model Publication No. 2-11248. This unit brake is a combination of an air brake and a hand brake. When compressed air is introduced into the brake cylinder 1, the piston 2 moves forward and is connected to the piston 2 via the connecting pin 3. The lever 4 swings counterclockwise around the fulcrum pin 5.
[0003]
As a result, the brake push rod 8 connected to the lever lever 4 moves forward through the spherical bearing 6 and the gap adjuster 7, whereby the brake 9 is pressed against the wheel 10 and a braking force is obtained. On the other hand, at the time of hand braking, when the operation member 11 such as a wire is pulled forward, the hand brake lever 13 and the first relay lever 14 are integrally rotated counterclockwise around the fulcrum pin 12.
[0004]
Accordingly, when the pin 15 is pushed up by the first relay lever 14, the second relay lever 16 rotates clockwise about the fulcrum pin 17, and the second relay lever 16 presses the connecting pin 3 forward. By doing so, the piston 2 moves forward and a braking action is obtained. In this unit brake, as shown in FIG. 7, by attaching the hand brake lever 13 to the fulcrum pin 17 side, the operation member 11 can be pulled backward to act on the hand brake. The hand brake can be operated from either the front or rear side.
[0005]
[Problems to be solved by the invention]
However, depending on the railway vehicle, when the operation member 11 is arranged in parallel with the traveling direction of the unit brake, there is a problem that the operation member 11 is difficult to dispose because the operation member 11 interferes with the wheel 10 or the carriage. Was.
[0006]
[Means for Solving the Problems]
An object of the present invention is to solve the above-described problems and to provide a unit brake that can be easily arranged without causing an operation member to interfere with a vehicle carriage or the like.
Therefore, the unit brake of claim 1 includes a brake cylinder that presses a brake against a wheel to drive a brake by driving a piston with air pressure, a link mechanism for a hand brake linked to the piston of the brake cylinder, and the link In a vehicle unit brake that is connected to a mechanism and has an operation member that moves the piston in the braking direction via the link mechanism in response to manual operation of a hand brake, the link mechanism is supported swingably by a first fulcrum. A relay lever that is engaged with the engaged portion of the piston, an operating portion that is provided on the relay lever, and swings the relay lever by its downward movement to move the piston in the braking direction, The second fulcrum located above the first fulcrum is supported by the second fulcrum so that the lower end of the second fulcrum is in contact with the operation unit. And a hand brake lever which the operating member is connected to the end, the hand brake lever is provided the mounting direction can be changed so as to as or orthogonal to parallel with the traveling direction of the swinging direction wheels In addition, the operation portion is sized so as to be able to contact the lower end portion regardless of the mounting direction of the hand brake lever .
[0007]
In the above configuration, during manual braking, when the operation member is manually operated, the hand brake lever swings around the second fulcrum, and the lower end portion of the hand brake lever moves the operation portion of the relay lever downward. . Along with this, the relay lever swings and moves the piston in the braking direction.
[0008]
Here, the operation of the relay lever is moved downward by the hand brake lever, so that the braking action during hand braking is obtained. The part can be moved down. In this way, the hand brake lever can be attached in any direction, so that the operation member is not only in the traveling direction of the vehicle, for example, the vehicle body perpendicular to the traveling direction, corresponding to the mounting direction of the hand brake lever. Even if it is arranged in any direction such as a central direction or a direction having a predetermined angle with respect to the traveling direction, it is possible to obtain a hand braking action.
[0011]
The unit brake according to claim 2 is characterized in that, in the configuration according to claim 1, a roller (rotating body) is provided at a lower end portion of the hand brake lever that comes into contact with the operation portion. Thereby, the operation force from the operation member can be effectively transmitted from the roller of the hand brake lever to the operation portion of the relay lever.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, the unit brake U faces the wheel 20 of the railway vehicle with a predetermined gap and is pressed against the wheel 20 to provide a braking device 21 that applies a braking action, and the control device 21 and the wheel. A clearance adjuster 22 that adjusts the size of the clearance between the brake 20 and a brake cylinder 23 that is driven by air pressure and presses the control member 21 against the wheel 20 via the clearance adjuster 22; and a piston 24 of the brake cylinder 23 A hand brake link mechanism 25 and the like linked to each other are provided. A part of the gap adjuster 22, the brake cylinder 23 and the link mechanism 25 are accommodated in the case 26.
[0013]
The control member 21 is supported by a metal control member head 27, which is connected to the tip of the brake push rod 30 by a connecting pin 28, and is supported by a support pin 31 provided on the upper part of the case 26. The support lever 32 whose upper end is swingably supported has its lower end rotatably connected to the connecting pin 28. As a result, the support lever 32 swings as the restrictor 21 approaches or separates from the wheel 20.
[0014]
The brake push rod 30 is immersed in the case 26 through the opening 33 of the case 26, and a bellows-like expandable / contractible cover 34 is disposed between the peripheral portion of the opening 33 and the tip of the brake push rod 30. Yes. In the case 26, a male screw 35 is formed on the outer periphery of the brake push rod 30, and this male screw 35 is screwed into a female screw 36 on the inner periphery of the gap adjuster 22 formed in a cylindrical shape.
[0015]
An annular pressure chamber 37 is formed between the brake cylinder 23 and the piston 24, and the pressure chamber 37 is connected to a compressed air supply / discharge unit (not shown) via a supply / discharge port 38. A spring 41 that biases the piston 24 rearward is disposed between the piston 24 and an annular wall 40 provided in the case 26. The piston 24 is integrally provided with a piston push rod 42 extending forward.
[0016]
The tip of the piston push bar 42 is bifurcated, the upper end of the lever lever 43 is sandwiched therebetween, and the piston push bar 42 and the lever lever 43 are rotatably connected by a connecting pin 44. A lower portion of the lever lever 43 is connected to the gap adjuster 22 by a spherical bearing 45, and a lower end portion of the lever lever 43 is rotatably supported by a fulcrum pin 46 provided on the case 26.
[0017]
The link mechanism 25 includes a relay lever 47 and a hand brake lever 48. A fulcrum pin 50 (first fulcrum) is provided near the upper end of the case 26, and the relay lever 47 is supported by the fulcrum pin 50 so as to be swingable at the upper end. An operation unit 51 is provided on the upper surface of the relay lever 47 near the fulcrum pin 50. The lower portion of the relay lever 47 is bifurcated and is engaged with the connecting pin 44 (the engaged portion of the piston) from the rear.
[0018]
An opening 52 (opening) is provided in the case 26 above the operation unit 51, and a lid 53 is detachably attached around the opening 52. The lid 53 is made of a rigid material such as metal, and has a lid main body 54 fixed around the opening 52 and a bellows-like expandable / contractible cover 55. The lid body 54 is provided with a fulcrum pin 56 (second fulcrum), and the fulcrum pin 56 is located above the fulcrum pin 50.
[0019]
The hand brake lever 48 is swingably supported by a fulcrum pin 56. A roller 58 (rotating body) is rotatably attached to the lower end portion of the hand brake lever 48 via a pin 57, and the roller 58 is in contact with the operation unit 51 from above. An operation member 59 such as a wire is connected to the upper end of the hand brake lever 48 protruding upward from the telescopic cover 55. The operation member 59 extends forward in the traveling direction of the vehicle. As the operation member 59, an iron bar or the like can be used in addition to the wire.
[0020]
In the above configuration, when the compressed air is supplied from the supply / exhaust port 38 into the pressure chamber 37 during braking while the vehicle is running, the piston 24 moves forward against the urging force of the spring 41, and accordingly, the insulator The lever 43 swings counterclockwise about the fulcrum pin 46. The clearance adjuster 22 and the piston push rod 42 connected to the lever lever 43 via the spherical bearing 45 are moved forward by this, and the brake member 21 is pressed against the wheel 20 to obtain a predetermined braking action.
[0021]
When releasing the braking action, when the compressed air is exhausted from the pressure chamber 37, the piston 24 is moved rearward by the biasing force of the spring 41, and accordingly, the lever lever 43 is rotated in the clockwise direction. The wheel 21 moves away from the wheel 20 and moves backward.
[0022]
On the other hand, when the hand brake is applied when the vehicle is stopped, when the hand brake operation is performed, the operation member 59 is pulled forward, and the hand brake lever 48 swings around the fulcrum pin 56 in the counterclockwise direction. Along with this, the roller 58 presses the operation unit 51 downward, and the operation unit 51 moves downward, whereby the relay lever 47 swings clockwise.
[0023]
When the relay lever 47 swings in the clockwise direction, the connecting pin 44 is pressed forward by the relay lever 47, whereby the piston 24 moves forward, so that the piston push rod 42 moves forward and a braking action is obtained. It is done. When releasing the hand brake, when the traction force on the operation member 59 is loosened, the piston 24 moves rearward due to the urging force of the spring 41, and the restrictor 21 is separated from the wheel 20.
[0024]
In the second embodiment shown in FIG. 2, the attachment direction of the lid 53 with respect to the case 26 is reversed by 180 ° with respect to that of FIG. The operation member 59 such as a wire is arranged so as to extend rearward in the traveling direction of the vehicle, and the operation brake 59 is pulled rearward so that the hand brake is applied. In this case, when the operation member 59 is pulled backward during hand braking, the hand brake lever 48 swings clockwise around the fulcrum pin 56 and the roller 58 moves the operation unit 51 downward. Braking by hand brake is performed in the procedure.
[0025]
Further, in the third embodiment shown in FIGS. 3 and 4, the mounting direction of the lid 53 is shifted by 90 ° with respect to that in FIG. In this case, the operation member 59 is disposed so as to extend toward the vehicle body center side, and when the operation member 59 is pulled toward the vehicle body center side during hand braking, the roller 58 moves the operation unit 51 downward. Braking is performed.
[0026]
As shown in FIG. 5, in the third embodiment, an operation member 59 such as a wire extends from the unit brake U toward the center of the vehicle body and reaches the pulley 60, and the pulley 60 performs a 90 ° direction change. For example, it extends to the front side in the traveling direction of the vehicle. As described above, when it is difficult to directly pull out the operation member 59 forward or backward in the traveling direction of the vehicle from the position where the unit brake U is provided due to interference with other members, the operation member 59 is temporarily moved to the center of the vehicle body. For example, the direction can be changed to the traveling direction side of the vehicle. In addition, the pulling-out direction of the operation member 59 from the unit brake U can be an arbitrary direction such as a direction inclined with respect to both the traveling direction and the vehicle body center direction in addition to the vehicle traveling direction or the vehicle body center direction. .
[0027]
【The invention's effect】
As described above, the unit brake according to the first aspect of the present invention includes the brake cylinder that presses the brake against the wheel and brakes by driving the piston with air pressure, and the link for the hand brake linked to the piston of the brake cylinder. In a vehicle unit brake including a mechanism and an operation member connected to the link mechanism and moving the piston in the braking direction via the link mechanism in response to manual operation of a hand brake, the link mechanism is A relay lever that is swingably supported and is engaged with the engaged portion of the piston, and an operation that is provided on the relay lever and that moves the piston in the braking direction by swinging the relay lever by its downward movement. And a second fulcrum located above the first fulcrum and swingably supported, and its lower end is in contact with the operation part. In, and a hand brake lever which the operating member at its upper end is connected, the hand brake lever, capable of changing the mounting direction so as to or perpendicular to allow parallel the swinging direction to the traveling direction of the wheel In addition, the operating portion is sized so that it can contact the lower end of the hand brake lever regardless of the mounting direction of the hand brake lever. The operation unit can be moved down.
[0028]
Therefore, the operation member is not limited to the traveling direction of the vehicle. Therefore, the operation member can be easily arranged so as not to interfere with the wheel, the carriage, or the like.
[0030]
The unit brake according to claim 2 is configured such that, in the configuration of claim 1, a roller is provided at a lower end portion of the hand brake lever that comes into contact with the operation portion. Therefore, the transmission force can be effectively transmitted to the operation portion of the relay lever, and the transmission efficiency of the operation force can be improved.
[Brief description of the drawings]
FIG. 1 is a side view showing a unit brake according to a first embodiment of the present invention.
FIG. 2 is a side view showing a unit brake according to a second embodiment.
FIG. 3 is a side view showing a unit brake according to a third embodiment.
4 is a partial rear view taken along line AA in FIG. 3;
FIG. 5 is a schematic plan view of a vehicle having a unit brake according to a third embodiment.
FIG. 6 is a side view showing a conventional unit brake.
FIG. 7 is a side view of the conventional unit brake when the pull-out direction of the operation member is changed.
[Explanation of symbols]
20 Wheel 21 Brake 23 Brake cylinder 24 Piston 47 Relay lever 48 Hand brake lever 50 Supporting pin (first supporting point)
51 Operation part 52 Opening (opening part)
53 Lid 56 fulcrum pin (second fulcrum)
58 Roller 59 Operation member

Claims (2)

A brake cylinder that presses the brake against the wheel and brakes by driving the piston with air pressure, a hand brake link mechanism that is linked to the piston of the brake cylinder, and a manual brake brake that is connected to the link mechanism. In response to a unit brake for a vehicle including an operation member that moves the piston in a braking direction via the link mechanism.
The link mechanism is swingably supported by a first fulcrum and is provided on the relay lever which is engaged with the engaged portion of the piston. The operating portion for moving the piston in the braking direction and the second fulcrum located above the first fulcrum are supported so as to be swingable, the lower end thereof abuts on the operating portion, and the upper end is provided with the operating member. With a hand brake lever connected,
The hand brake lever is provided so that its mounting direction can be changed so that its swinging direction is parallel or orthogonal to the traveling direction of the wheel, and the operation section is independent of the mounting direction of the hand brake lever. A unit brake having a size capable of contacting the lower end portion. The unit brake according to claim 1 , wherein a roller is provided at a lower end portion of the hand brake lever that contacts the operation portion .

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