WO2014109209A1 - ブレーキシリンダ装置及びディスクブレーキ装置 - Google Patents
ブレーキシリンダ装置及びディスクブレーキ装置 Download PDFInfo
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- WO2014109209A1 WO2014109209A1 PCT/JP2013/084207 JP2013084207W WO2014109209A1 WO 2014109209 A1 WO2014109209 A1 WO 2014109209A1 JP 2013084207 W JP2013084207 W JP 2013084207W WO 2014109209 A1 WO2014109209 A1 WO 2014109209A1
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- Prior art keywords
- brake
- piston
- cylinder
- spring
- space
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H5/00—Applications or arrangements of brakes with substantially radial braking surfaces pressed together in axial direction, e.g. disc brakes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/24—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release the fluid being gaseous
- B60T13/26—Compressed-air systems
- B60T13/261—Compressed-air systems systems with both indirect application and application by springs or weights and released by compressed air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/2245—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members in which the common actuating member acts on two levers carrying the braking members, e.g. tong-type brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
- F16D65/16—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake
- F16D65/18—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position arranged in or on the brake adapted for drawing members together, e.g. for disc brakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2121/00—Type of actuator operation force
- F16D2121/02—Fluid pressure
- F16D2121/04—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure
- F16D2121/06—Fluid pressure acting on a piston-type actuator, e.g. for liquid pressure for releasing a normally applied brake
Definitions
- the present invention relates to a brake cylinder device capable of operating both a fluid brake mechanism used during operation of a railway vehicle and a parking spring brake mechanism used during parking of the railway vehicle, and a disc brake device including the brake cylinder device.
- Patent Document 1 discloses an actuator (including a service brake piston for generating a braking force used when a railway vehicle is operated and a parking brake piston for generating a braking force used when the railway vehicle is parked). Brake cylinder device) is disclosed.
- the service brake piston is urged in the direction opposite to the output direction of the brake force (retraction direction) by a second coil spring whose one end abuts against a partition wall fixed to the housing (cylinder).
- the service brake piston advances in the brake output direction (advance direction) by the fluid flowing into the sealed chamber on the service brake side. That is, the service brake generates a braking force by fluid pressure acting on the sealed chamber, and the service brake piston is pushed and moved in the advancing direction against the urging force of the second coil spring.
- the parking brake piston is urged in the advancing direction by a first coil spring whose one end abuts against the front wall of the cylinder.
- the parking brake piston is retracted in the retracting direction by the fluid flowing into the sealed chamber on the parking brake side. That is, the parking brake generates a braking force by discharging the fluid from the sealed chamber and moving the parking brake piston by being pushed in the advance direction by the first coil spring.
- the parking brake spring (first coil spring in Patent Document 1) is shortened to reduce the parking brake portion. It is possible to shorten it. However, if so, an excessive load is applied to the first coil spring, which increases the restriction on the design condition of the first coil spring so as to withstand the load. As a result, the cost of the entire brake cylinder device increases.
- the present invention has been made in view of the above circumstances, and an object thereof is to shorten the overall length of the brake cylinder device while suppressing an increase in restrictions on the design conditions of the spring for parking brake. It is.
- a brake cylinder device includes a cylinder, a fluid brake mechanism that outputs a braking force by pressure fluid, and a parking spring brake mechanism that is used when a railway vehicle is parked. It is equipped with.
- the cylinder is formed in a cylindrical shape and has a cylinder body having a cylinder bottom on one side, and the cylinder space in the cylinder body is opposite to the first space on the cylinder bottom side in the cylinder axis direction of the cylinder body.
- a first spring that has one end abutting against one support portion and biases the first piston retraction direction ton toward a retraction direction approaching the cylinder bottom; and the first spring in the first space with respect to the accommodation space of the first spring
- a first pressure chamber opposite to the first piston, and pressure fluid is supplied to the first pressure chamber so that the first piston resists the biasing force of the first spring.
- the parking spring brake mechanism includes a second piston disposed in the second space, a second piston cylinder portion extending in a cylindrical shape from the second piston in the advance direction, A second spring that has one end abutting against a second support portion fixed to the cylinder body and biases the second piston in the advance direction via the second piston tube portion; and in the second space, A second pressure chamber on the opposite side of the second piston cylinder portion with respect to the second spring accommodating space, from a state in which pressure fluid is supplied to the second pressure chamber to a state in which it is discharged
- the second piston is configured to move in the advance direction by the urging force of the second spring, and the second spring is disposed inside the second piston cylinder portion, 2 pressure chambers, the second piston It is arranged outside the part.
- the accommodation space and 2nd pressure chamber of a 2nd spring do not overlap in a brake output direction.
- the second piston cylinder part by disposing the second piston cylinder part outside the second spring as described above, the second pressure chamber and the accommodation space for the second spring can be partitioned by the second piston cylinder part. Thereby, the second piston can be advanced and retracted relative to the cylinder by supplying and discharging the pressure fluid to and from the second pressure chamber.
- the overall length of the brake cylinder device can be shortened while suppressing an increase in restrictions on the design condition of the spring for the parking brake.
- the second support portion is disposed closer to the partition portion than the end portion on the advance direction side of the second piston in the advanced state in the advance direction.
- a 2nd support part is arrange
- the second support part is a part on the second space side in the partition part.
- the second support portion can be configured by the partition portion that partitions the first space and the second space, the arrangement space of the second spring in the brake output direction can be more reliably ensured.
- the configuration of the cylinder can be simplified.
- the first support portion is a portion of the partition portion on the first space side.
- the first support portion can be configured by the partition portion. If it carries out like this, since the accommodation space of a 1st spring can be lengthened in a brake output direction compared with the case where a 1st support part is provided separately from the part to partition, the arrangement
- the second piston and the second piston cylinder part are formed separately and engage with each other.
- the second piston cylinder portion is inserted into the cylinder body from one side of the cylinder body in the cylinder axis direction, while the second piston is inserted into the cylinder body from the other side of the cylinder axis direction. Can be inserted into. Then, the second piston cylinder part and the second piston can be engaged thereafter. Thereby, the assemblability of the brake cylinder device can be further improved.
- the brake cylinder device includes a ventilation path in which a region on one side is connected to the accommodation space of the first spring and communicates the accommodation space of the first spring to the outside, and the one side in the ventilation path
- the region on the side is a first passage extending downward from the housing space side of the first spring in the horizontal direction in the brake cylinder device fixed to the railway vehicle.
- the region connected to the housing space for the first spring in the one side region in the air passage is the housing space for the first spring in the brake cylinder device in a state of being fixed to a railway vehicle. Connected to the bottom of
- the brake cylinder device is disposed in the bottomed tube portion so that the bottomed tube portion formed in a cylindrical shape having a bottom portion and the bottomed tube portion can advance and retreat in the tube axis direction of the bottomed tube portion.
- a piston portion and is formed so as to extend from the piston portion to the opening side of the bottomed tube portion, and the tip portion is exposed from the bottomed tube portion by advancing from the bottomed tube portion, while the bottomed tube
- An indicator mechanism having a member and a communication passage communicating with the second pressure chamber in a pressure fluid space opposite to the elastic member sandwiching the piston portion in the internal space of the bottomed cylindrical portion; The indicator unit is arranged through the communication path. The pressure fluid flowing into the power fluid space, retracted to advance or the bottomed cylinder portion from the bottomed cylindrical portion against the biasing force of the elastic member.
- the brake cylinder device is configured such that the urging force of the elastic member works in a direction in which the indicator portion protrudes from the bottomed tube portion, or the urging force of the elastic member causes the indicator portion to move inside the bottomed tube portion. It is comprised so that it may work in the direction made to accommodate.
- the indicator portion is in a state of being urged by the elastic member and protruding from the bottomed tubular portion. That is, if the state where the indicator part is exposed from the bottomed cylinder part is confirmed, it can be grasped that the second piston is located in the advance direction side.
- the pressure fluid is supplied to the second pressure chamber, so the pressure fluid is also supplied to the pressure fluid space of the indicator mechanism. It will be. Therefore, in this state, the indicator portion is pressed in the direction opposite to the urging force of the elastic member by the pressure fluid and is accommodated in the bottomed tube portion. That is, if the state in which the indicator part is accommodated in the bottomed cylinder part is confirmed, it can be grasped that the second piston is positioned in the retreat direction side.
- the pressure fluid is not supplied to the pressure fluid space of the indicator mechanism, and the indicator portion is urged by the elastic member and pressed into the bottomed tube portion. It is in a state. That is, if the state in which the indicator part is accommodated in the bottomed cylinder part is confirmed, it can be grasped that the second piston is located in the advance direction side.
- the indicator portion is moved in the direction opposite to the biasing force of the elastic member by the pressure fluid. It is pressed and protrudes from the bottomed cylindrical portion. That is, if the state where the indicator part is exposed from the bottomed cylinder part is confirmed, it can be grasped that the second piston is positioned in the retreat direction side.
- the position state of the second piston can be confirmed mechanically without using a mechanism such as a pressure sensor.
- a brake cylinder device has a piston in which a pressure chamber and a spring are opposed to each other, and shifts from a state in which pressure fluid is supplied to the pressure chamber to a state in which the pressure chamber is discharged.
- a parking spring brake mechanism for generating a braking force used when the vehicle is parked by moving the piston by the biasing force of the spring.
- the brake cylinder device includes a bottomed cylinder part formed in a cylindrical shape having a bottom part, a piston part provided in the bottomed cylinder part so as to be able to advance and retreat in the cylinder axis direction of the bottomed cylinder part, and the piston
- a bottomed cylinder part formed in a cylindrical shape having a bottom part
- a piston part provided in the bottomed cylinder part so as to be able to advance and retreat in the cylinder axis direction of the bottomed cylinder part
- the piston By extending from the bottomed cylindrical part to the opening side of the bottomed cylindrical part, the tip part is exposed from the bottomed cylindrical part by advancing from the bottomed cylindrical part, and by retreating to the bottomed cylindrical part
- An indicator part in which the tip part is accommodated in the bottomed cylinder part, an elastic member arranged in the bottomed cylinder part so as to bias the piston part to one side in the cylinder axis direction, and the bottomed cylinder
- a pressure chamber is used to supply a pressure fluid that acts against a spring that generates a parking brake force using a pressure sensor. It is conceivable to detect whether or not a predetermined pressure is applied to the.
- the pressure sensor When the pressure state of the pressure chamber is confirmed using the pressure sensor, the pressure sensor is attached to the brake cylinder device due to problems such as restrictions on the wiring of the electrical wiring connected to the pressure sensor and restrictions on the arrangement space of the pressure sensor. It is difficult to install directly. Therefore, in general, the pressure sensor is disposed in a brake control device that is provided between the pressure fluid supply source and the brake cylinder device and controls supply and discharge of the pressure fluid to and from the pressure chamber. However, since the brake control device is disposed at a position relatively distant from the brake cylinder device, it cannot be easily determined whether or not a predetermined pressure is applied in the vicinity of the brake cylinder device.
- the brake cylinder device is made in view of the above-described situation, and the purpose thereof is predetermined in a pressure chamber to which a pressure fluid that acts opposite to a spring that generates a parking brake force is supplied. It is possible to easily determine whether or not the pressure is applied in the vicinity of the brake cylinder device.
- the brake cylinder device In the brake cylinder device according to the other aspect described above, it is possible to grasp whether or not the pressure fluid is supplied to the pressure chamber for compressing the spring for parking brake by the mechanically configured indicator mechanism.
- an indicator mechanism By using such an indicator mechanism, no electrical wiring is required, and restrictions on the routing of the electrical wiring when using the pressure sensor are eliminated. As a result, it becomes easy to attach the indicator mechanism directly to the brake cylinder device. Therefore, the state of the pressure fluid in the pressure chamber can be easily determined in the vicinity of the brake cylinder device.
- the brake cylinder device further includes a parking brake manual release mechanism, and the elastic member urges the piston portion in a direction in which the indicator portion advances from the bottomed tube portion.
- the indicator mechanism is disposed in the bottomed cylinder part, and the indicator mechanism is moved from the second pressure chamber into the pressure fluid space, the advance position where the indicator part is urged by the elastic member and advances from the bottomed cylinder part.
- the parking brake manual release mechanism has an operating rod that can be moved forward and backward with respect to the cylinder.
- a lock position for holding the engagement of the first piston with the second piston in a state where the rod is pushed into the cylinder side by the urging force of the urging member;
- Serial operating rod is switchably configured, a release position for releasing the brake by the first piston release to the parking spring brake mechanism engagement against the second piston to be pulled from the cylinder side.
- the second pressure chamber in this configuration corresponds to the pressure chamber of the brake cylinder device according to another aspect described above, and the second piston in this configuration corresponds to the piston of the brake cylinder device according to another aspect described above. To do.
- the indicator mechanism is configured such that the tip portion of the indicator portion is urged by the elastic member and exposed from the bottomed tube portion, and the tip portion of the indicator portion is supplied with pressure fluid into the pressure fluid space. It is configured to be switchable to a retracted position accommodated in the bottomed cylindrical portion.
- the user can grasp
- the user can grasp that the 2nd piston is located in the retreat direction side, when the tip part of an indicator part is in a retreat position.
- the brake cylinder mechanism has a parking brake manual release mechanism that can manually release the braking force by the parking spring brake mechanism.
- the parking brake manual release mechanism engages the first piston and the second piston with each other when the operation rod is pushed into the cylinder side by the urging force of the urging member (the operation rod is in the locked position). Yes. That is, when the operating rod is in the locked position, the first piston and the second piston are engaged. Therefore, when the pressure fluid is discharged from the second pressure chamber in this state, a braking force is generated by the parking spring brake mechanism.
- the parking brake manual release mechanism as described above allows the user to visually grasp that the first piston and the second piston are engaged when the operating rod is in the locked position. On the other hand, when the operating rod is in the release position, the user can visually grasp that the engagement between the first piston and the second piston is released.
- the user can grasp the state of the parking spring brake mechanism by confirming the position of the indicator section (advance position or reverse position) and the position of the operation rod (lock position and release position). Specifically, the user can determine that the braking force by the parking spring brake mechanism is generated when (a) the indicator unit is in the advanced position and the operation rod is in the locked position. Further, the user can determine that (b) when the indicator portion is in the retracted position and the operation rod is in the locked position, the pressure fluid is supplied to the second pressure chamber, and no braking force is generated by the parking spring brake mechanism. .
- the user when the indicator portion is in the advanced position and the operation rod is in the release position (because the operation rod is pulled because the first piston and the second piston are not engaged). It can be determined that the brake by the parking spring brake mechanism is not effective and is in the released state.
- the user can not only confirm whether or not the braking force is generated by the parking spring brake mechanism, but can also grasp the cause of the absence of the braking force at the same time.
- the operation rod and the indicator portion are at least discriminated between the lock position and the release position in the operation rod, and discriminated between the advanced position and the retracted position in the indicator portion. It is installed so that it can be seen simultaneously from one direction.
- the user can check the state of the indicator part and the state of the operation rod from one direction at the same time. Therefore, the state of the parking spring brake mechanism can be grasped in a relatively short time.
- the indicator part is installed so that one of the planes including the straight line in which the indicator part advances and retreats is the same as or parallel to one of the planes including the straight line in which the operation rod advances and retreats.
- the user can easily see the position of the indicator unit and the operating rod by viewing the indicator unit and the operating rod from a direction perpendicular to the same or parallel plane as described above. Therefore, the state of the parking spring brake mechanism can be grasped in a shorter time.
- an invention of a disc brake device including any one of the above-described brake cylinder devices may be configured. That is, the disc brake device includes any one of the above-described brake cylinder devices, and a caliper body that is equipped with the brake cylinder device and is attached to the vehicle. A pair of brake pads attached to the caliper body sandwich the axle-side disc to generate a braking force.
- a disc brake device provided with a brake cylinder device configured to shorten the overall length while suppressing an increase in the restriction of the design condition of the spring for the parking brake. . Therefore, a miniaturized disc brake device can be provided.
- the present invention it is possible to shorten the overall length of the brake cylinder device while suppressing an increase in restrictions on the design conditions of the spring for the parking brake.
- FIG. 1 is a side view of a disc brake device provided with a brake cylinder device for a railway vehicle according to an embodiment of the present invention.
- 1 is a side view showing a brake cylinder device for a railway vehicle according to an embodiment of the present invention. It is the figure which looked at the brake cylinder apparatus shown in FIG. 2 from III direction.
- FIG. 4 is a cross-sectional view seen from the position of arrows IV-IV in FIG. It is an enlarged view of the V section of FIG. It is an enlarged view of the VI section of FIG. It is an enlarged view of the VII section of Drawing 4, and is a figure for explaining a crevice adjustment mechanism.
- FIG. 4 is a cross-sectional view seen from the position of arrows IV-IV in FIG. It is an enlarged view of the V section of FIG. It is an enlarged view of the VI section of FIG. It is an enlarged view of the VII section of Drawing 4, and is a figure for explaining a crevice adjustment mechanism.
- FIG. 4 is
- FIG. 8 is a diagram in which components inside the lock sleeve are omitted in the cross-sectional view as viewed from the position indicated by arrows VIII-VIII in FIG. 3, and is a diagram for explaining a parking brake manual release mechanism. It is an enlarged view of the IX part of FIG. It is sectional drawing seen from the X- ⁇ X arrow position of FIG. 3, Comprising: It is a figure for demonstrating an indicator mechanism.
- the embodiment of the present invention can be widely applied as a brake cylinder device and a disc brake device for railway vehicles.
- FIG. 1 is a side view of a disc brake device 1 including a brake cylinder device 2 for a railway vehicle according to an embodiment of the present invention as viewed from the axle direction.
- the disc brake device 1 includes a brake cylinder device 2 and a caliper body 100.
- the caliper body 100 is equipped with the brake cylinder device 2 and is attached to the vehicle body 102 so as to be rotatable in the vehicle roll rotation direction.
- said vehicle roll rotation direction means the rotation direction which makes the advancing direction of a vehicle the rotation axis direction.
- the caliper body 100 includes a coupling member 101 and a pair of brake levers 102 and 102. In FIG. 1, only one of the pair of brake levers 102 is illustrated.
- the brake pad 104 fixed to each of the pair of brake levers 102 and 102 holds the brake disc 122 fixed to the wheel shaft of the railway vehicle so as to brake the rotation of the wheel. It is configured.
- the coupling member 101 is attached to a bracket 121 fixed to the bottom surface of the vehicle main body 120 via a swing pin 101a so as to be swingable about an axis parallel to the vehicle advance direction.
- a pair of brake levers 102 and 102 are swingably installed with respect to the coupling member 101 via a pair of fulcrum pins 102a.
- the fulcrum pin 102a is installed so as to extend in a direction perpendicular to the axial direction of the swing pin 101a when viewed from the rotation axis direction of the brake disk 122 (when viewed from the wheel axis direction).
- the brake cylinder device 2 is attached to one end side of the pair of brake levers 102, 102 via a cylinder support pin 102b, and one end side is driven by the brake cylinder device 2.
- the pair of brake levers 102 and 102 are attached with a pair of back plates 103 and 103 holding the brake pad 104 on the other end side via a fulcrum pin 102a with respect to one end side to which the brake cylinder device 2 is attached. It has been.
- the back plate 103 is swingably attached to the brake lever 102 via a support pin 103a extending in parallel with the fulcrum pin 102a. Therefore, the pair of brake levers 102 and 102 support the brake pad 104 via the back plate 103, respectively.
- the cylinder 20 of the brake cylinder device 2 is attached to one brake lever 102, and the brake output portion 11 of the brake cylinder device 2 is attached to the other brake lever 102.
- the operation of the brake output unit 11 to advance with respect to the cylinder 20 (operation to leave the cylinder) or the operation to retract (operation to approach the cylinder) is performed by the operation of the brake cylinder device 2.
- the cylinder support pin 102b vicinity in a pair of brake levers 102 and 102 is driven so that it may mutually separate or adjoin.
- the direction in which the brake output unit 11 advances with respect to the cylinder 20 is referred to as the advance direction X1
- the direction in which the part 11 retracts to the cylinder 20 is defined as the retreat direction X2.
- the advancing direction X1 and the retracting direction X2 are defined as the advancing / retreating directions of the brake output unit 11.
- the pair of brake levers 102 and 102 operate using the fulcrum pin 102a as a support shaft, and operate so as to sandwich the brake disc 122 between the brake pads 104. .
- the rotation of the brake disk 122 is braked, and the rotation of the wheels of the railway vehicle provided coaxially with the brake disk 122 is braked.
- FIG. 2 is a side view showing the brake cylinder device 2.
- FIG. 3 is a view of the brake cylinder device 2 shown in FIG. 2 as viewed from the III direction.
- FIG. 4 is a cross-sectional view taken from the position of arrows IV-IV in FIG.
- the brake cylinder device 2 includes a brake output unit 11, a cylinder 20, a fluid brake mechanism 30, a parking spring brake mechanism 40, a gap adjustment mechanism 50, a parking brake manual release mechanism 60, an indicator mechanism 80, and the like. I have.
- the cylinder 20 includes a cylinder body 21 and a partition wall portion 24.
- the cylinder body 21 includes a first cylinder part 22 and a second cylinder part 23.
- the first cylinder part 22 includes a disk-like cylinder bottom part 22a formed in a circular shape in plan view, and a first cylinder wall part 22b formed in a cylindrical shape extending in the advancing direction X1 from the peripheral part of the cylinder bottom part 22a. have. That is, the 1st cylinder part 22 is formed in the bottomed cylinder shape.
- the second cylinder portion 23 is formed in a substantially cylindrical shape, and is disposed so that one end surface thereof overlaps the end surface on the advance direction X1 side in the first cylinder portion 22.
- the 2nd cylinder part 23 is provided with the large diameter cylinder part 23a, the annular wall part 23b, and the small diameter cylinder part 23c.
- the large-diameter cylindrical portion 23a is formed in a cylindrical shape having substantially the same inner diameter as the first cylindrical wall portion 22b.
- the large-diameter cylindrical portion 23a may have an inner diameter different from that of the first cylindrical wall portion 22b.
- a bulging portion 28 that bulges outward in the radial direction as compared with other portions is formed in a portion of the large-diameter cylindrical portion 23a in the circumferential direction.
- the bulging portion 28 is provided so as to bulge downward in the brake cylinder device 2 fixed to the vehicle main body 120 of the railway vehicle.
- the bulging portion 28 is formed with a first passage 28a that extends downward from the portion of the bulging portion 28 exposed in the first spring accommodating space S12 (described in detail later) and toward the advancing direction X1. Yes. Further, the bulging portion 28 is formed with a fitting hole 28b that extends from the portion on the advancing direction X1 side in the bulging portion 28 to the retracting direction X2 side and communicates with the first passage 28a.
- the first passage 28a is formed so as to extend downward and toward the advancing direction X1 as described above.
- the first passage 28a is not limited to this.
- the first passage 28a is formed to extend vertically downward. May be.
- the annular wall portion 23b is formed in a thin annular shape.
- a large-diameter cylindrical portion 23a is integrally provided at an outer peripheral portion of the annular wall portion 23b, and a small-diameter cylindrical portion 23c is integrally provided at an inner peripheral portion of the annular wall portion 23b.
- the small-diameter cylindrical portion 23c is formed in a substantially cylindrical shape having a smaller diameter than the large-diameter cylindrical portion 23a.
- the small diameter cylindrical portion 23c may have a larger diameter than the large diameter cylindrical portion 23a.
- An annular packing groove 23d extending in the circumferential direction is formed on the inner peripheral surface of the small diameter cylindrical portion 23c.
- An annular packing 23e is fitted in the packing groove 23d.
- the partition wall portion 24 is provided between the first cylinder portion 22 and the second cylinder portion 23 in the cylinder body 21.
- the partition wall portion 24 includes a partition portion 25 and a cylindrical wall portion 26.
- the partition part 25 is formed in a substantially ring shape in which a relatively large hole is formed in the center part in a plan view.
- the outer peripheral edge of the partition 25 is sandwiched and held between the end surface on the advancing direction X1 side in the first cylinder portion 22 and the end surface on the retraction direction X2 side in the second cylinder portion 23.
- the partition part 25 divides the cylinder space S in the cylinder body 21 into a first space S1 and a second space S2.
- the first space S1 is a space on the cylinder bottom 22a side in the cylinder axis direction of the cylinder body 21, and the second space S2 is a space on the opposite side to the first space S1 in the cylinder axis direction of the cylinder body 21.
- the cylinder wall part 26 is formed in the cylinder shape extended from the edge part of the inner peripheral side in the partition part 25 to the advancing direction X1 side.
- the fluid brake mechanism 30 includes a first piston 31, a first spring 32, and a first pressure chamber S11.
- the first piston 31 is provided as a disk-shaped member formed in a substantially circular shape in plan view.
- the first piston 31 is disposed in the first cylinder portion 22 so as to be able to advance and retract with respect to the inner peripheral surface of the first cylindrical wall portion 22b of the first cylinder portion 22 via the packing 33.
- the first piston 31 moves in the first space S1 in the first cylinder portion 22 from the first pressure chamber S11 that is a space on the cylinder bottom portion 22a side of the first piston 31 and the advancing direction from the first piston 31. It is partitioned into a first spring housing space S12 that is a space on the X1 side.
- the first spring 32 is disposed in the first spring accommodating space S12.
- the first spring 32 biases the first piston 31 toward the cylinder bottom portion 22a (retracting direction X2 side) with respect to the partition portion 25.
- the portion on the first space S1 side in the partition portion 25 constitutes the first support portion 25a.
- the first pressure chamber S11 is connected to a first supply / exhaust port 34 for supplying and exhausting compressed air (pressure fluid) to the first pressure chamber S11 (see FIG. 3).
- the parking spring brake mechanism 40 includes a second piston 41, a second spring 42, a lock portion main body 43, and a second pressure chamber S21.
- the second piston 41 is provided as a slightly thick annular member in the forward / backward direction.
- the second piston 41 is formed so that the outer peripheral surface is slightly smaller in diameter than the inner diameter of the large-diameter cylindrical portion 23 a of the second cylinder portion 23.
- the 2nd piston 41 is arrange
- the second piston 41 is configured so that both end surfaces in the forward / backward direction are substantially flat.
- a packing groove 41 a extending in the circumferential direction is formed on the outer periphery of the second piston 41.
- An annular packing 44 is fitted in the packing groove 41a.
- the second piston 41 can move in the forward / backward direction with respect to the inner peripheral surface of the large-diameter cylindrical portion 23 a via the packing 44.
- a retaining ring annular groove 41 b extending in the circumferential direction is formed on the inner periphery of the second piston 41.
- a retaining ring 45 having a circular cross section formed in an annular shape is fitted in the retaining ring annular groove 41b.
- the lock part main body 43 includes a second piston cylinder part 46 and a second piston wall part 47 formed integrally with the second piston cylinder part 46.
- the second piston cylinder portion 46 is formed in a cylindrical shape.
- the second piston wall portion 47 is formed in a substantially annular shape that is slightly thick in the axial direction.
- the 2nd piston cylinder part 46 and the 2nd piston wall part 47 may be comprised by another member, and may mutually be connected.
- the second piston cylinder portion 46 is formed in a substantially cylindrical shape having an outer peripheral surface substantially the same diameter as the inner peripheral surface of the small diameter cylindrical portion 23c of the second cylinder portion 23.
- the second piston cylinder part 46 is arranged in the second cylinder part 23 so as to be able to advance and retreat with respect to the second cylinder part 23 via a packing 23e attached to the small diameter cylinder part 23c of the second cylinder part 23. ing.
- FIG. 5 is an enlarged view of the V portion of FIG. 4 and shows the vicinity of the engaging portion between the second piston 41 and the second piston cylinder portion 46.
- a retaining ring annular groove 46 a extending in the circumferential direction is formed at the end portion on the retracting direction X ⁇ b> 2 side of the outer peripheral surface of the second piston cylinder portion 46.
- a retaining ring 45 that fits into the retaining ring annular groove 41b of the second piston 41 is fitted into the retaining ring annular groove 46a. That is, the second piston 41 and the second piston cylinder 46 are engaged with each other via the retaining ring 45.
- the second piston cylinder part 46 divides the second space S2 in the second cylinder part 23 into a second pressure chamber S21 and a second spring accommodating space S22.
- the second pressure chamber S21 is a space on the outer side than the second piston cylinder part 46 and on the advancing direction X1 side of the second piston 41, and the second spring accommodating space S22 is located on the inner side of the second piston cylinder part 46. It is space.
- the second piston wall portion 47 has a through hole formed in the center portion in plan view. As shown in FIGS. 4 and 6, a stepped portion 47 a is formed in a portion of the inner peripheral surface of the second piston wall portion 47 on the advancing direction X1 side.
- a lock lid 77 is fixed to the second piston wall 47.
- the lock portion cover 77 is fixed to the second piston wall portion 47 in a state where the lock portion cover 77 is disposed so as to cover a portion of the second piston wall portion 47 on the advancing direction X1 side.
- annular groove is formed between the step portion 47a and the lock portion lid 77.
- This groove constitutes an outer annular groove 47b (see FIG. 6) in which a fixing ring 61 described later is fitted.
- a bulging portion 48 extending radially outward is formed on the outer peripheral surface of the second piston wall portion 47.
- the bulging portion 48 is formed with a closing member space 48a in which a closing member 62 described later is accommodated and an insertion hole 48b through which an operation rod 67 described later is inserted (see FIG. 8).
- the closing member space 48a extends from the space in the second piston wall portion 47 toward the bulging portion 48 side.
- the insertion hole 48 b extends in the bulging portion 48 from the closing member space 48 a toward the tangential direction of the second piston wall portion 47 and communicates with the outside.
- the second spring 42 has an inner second spring 42a and an outer second spring 42b.
- the inner second spring 42a and the outer second spring 42b are both provided as coil springs.
- the inner second spring 42 a has a second spring accommodating space such that one end thereof is in contact with a portion on the inner peripheral side of the partition portion 25 and the other end is in contact with a portion on the inner peripheral side of the second piston wall portion 47. Arranged in S22. The inner second spring 42 a urges the second piston 41 toward the advance direction X ⁇ b> 1 via the lock portion main body 43.
- the outer second spring 42b is disposed outside the inner second spring 42a. Specifically, the outer second spring 42b is disposed in the second spring accommodating space S22 so that one end thereof is in contact with the partition portion 25 and the other end is in contact with the second piston wall portion 47. .
- the outer second spring 42b urges the second piston 41 toward the advancing direction X1 via the lock portion main body 43, like the inner second spring 42a.
- the inner second spring 42a and the outer second spring 42b are configured such that the biasing force is relatively large.
- the portion on the second space S2 side of the partition portion 25 constitutes the second support portion 25b.
- the second pressure chamber S21 is an annular space surrounded by the second cylinder portion 23, the second piston 41, and the second piston cylinder portion 46 in the second space S2.
- the second pressure chamber S21 is connected to a second supply / exhaust port 49 for supplying and exhausting compressed air to and from the second pressure chamber S21 (see FIG. 3).
- a compressed air supply source (not shown) is connected to the second supply / exhaust port 49 via an air flow path (not shown).
- the air flow path is provided with a brake control device (not shown) for controlling supply and discharge of compressed air to and from the second pressure chamber S21.
- the brake control device is provided at a position relatively distant from the brake cylinder device 2.
- the brake cylinder device 2 includes a guide tube 12, a first clutch 13, a clutch nut 14, a screw shaft 15, a lock sleeve 16, and a front stopper 17, as shown in FIGS.
- the guide tube 12 is formed in a substantially cylindrical shape extending from the concave portion 31a of the first piston 31 toward the advancing direction X1 side.
- the guide tube 12 is inserted inside the cylindrical wall portion 26 and the lock portion main body 43.
- the guide tube 12 is fixed with respect to the first piston 31.
- annular groove 12a extending in the circumferential direction is formed on the outer peripheral surface at the distal end portion of the guide tube 12 (see FIG. 6).
- An engagement ring 93 formed in an annular shape having a circular cross section is fitted in the annular groove 12a.
- the first clutch 13 is fixed in the guide tube 12.
- An inner bulging portion 13a that bulges inward in the radial direction is formed on the inner circumferential surface of the first clutch 13 on the retracting direction X2 side (see FIG. 7).
- the clutch nut 14 is disposed inside the first clutch 13.
- An outer bulging portion 14a bulging outward in the radial direction is formed in a portion on the advancing direction X1 side of the clutch nut 14 (see FIG. 7).
- the clutch nut 14 is disposed inside the first clutch 13 so that the portion on the retracting direction X2 side in the outer bulging portion 14a faces the portion on the side in the advance direction X1 in the inner bulging portion 13a of the first clutch 13. Has been.
- the screw shaft 15 is formed in a substantially rod shape extending from the vicinity of the first piston 31 in the advancing direction X1.
- a screw thread is formed on the outer peripheral surface of the screw shaft 15. This thread is screwed into the screw hole on the inner peripheral surface of the clutch nut 14.
- a brake output unit 11 is connected to the tip of the screw shaft 15.
- the lock sleeve 16 is formed in a cylindrical shape that can be inserted into the gap between the lock portion main body 43 and the guide tube 12.
- the lock sleeve 16 is formed with an inner annular groove 16a extending in the circumferential direction at a midway portion in the cylinder axis direction on the outer peripheral surface of the lock sleeve 16 (see FIG. 6).
- a fixing ring 61 described later is fitted in the inner annular groove 16a.
- annular recess 16b that opens in the advance direction X1 side and radially inward and extends in the circumferential direction is formed at the end of the lock sleeve 16 on the advance direction X1 side (see FIG. 6).
- An engagement ring 93 fitted into the annular groove 12a of the guide tube 12 is fitted into the annular recess 16b.
- the engagement ring 93 engages or disengages both in the relationship between the lock sleeve 16 and the guide tube 12 depending on the direction in which one moves with respect to the other. Specifically, when the lock sleeve 16 moves in the advancing direction X1, the guide tube 12 also moves in the advancing direction X1 because both engage with each other via the engagement ring 93. On the other hand, when the guide tube 12 moves in the advancing direction X1, the engagement in both the advancing and retracting directions is released.
- the front stopper 17 is screwed to the guide tube 12.
- the front stopper 17 is provided such that a portion on the retracting direction X2 side is opposed to a portion on the advancing direction X1 side of the first clutch 13 and a portion on the advancing direction X1 side of the clutch nut 14 in the axial direction.
- the fluid brake mechanism 30 is used to brake the speed of the railway vehicle when the railway vehicle is traveling. That is, the fluid brake mechanism 30 is mainly used when the braking force by the parking spring brake mechanism 40 is not output (the compressed air as the compressed fluid is supplied to the second pressure chamber S21 and the second piston 41 is moved in the retracting direction X2. Is used to the side).
- the compressed air is supplied to the first pressure chamber S11. Then, since the compressed air flowing into the first pressure chamber S11 presses the first piston 31 in the advance direction X1 against the biasing force of the first spring 32, the first piston 31 moves in the advance direction X1, As a result, the guide tube 12 fixed to the first piston 31 also moves in the advance direction X1, and accordingly, the brake output unit 11 advances in the advance direction X1. Further, when the brake pad 104 comes into contact with the brake disc 122, the outer bulging portion 14a of the clutch nut 14 is pressed in the advancing direction X1 by the inner bulging portion 13a of the first clutch 13, so that the clutch nut 14 also moves in the advancing direction X1. Is pressed. Thereby, the screw shaft 15 screwed into the clutch nut 14 and the brake output portion 11 connected to the screw shaft 15 are pressed in the advancing direction X1. As a result, the braking force by the fluid brake mechanism 30 is generated.
- the parking spring brake mechanism 40 is used to prevent the railway vehicle from moving accidentally when the railway vehicle is parked. That is, the parking spring brake mechanism 40 is mainly used when the braking force from the fluid brake mechanism 30 is not output (no compressed air is supplied to the first pressure chamber S11 and the first piston 31 moves toward the retracting direction X2). Is used).
- the parking spring brake mechanism 40 When the parking spring brake mechanism 40 generates a braking force, the compressed air supplied to the second pressure chamber S21 is discharged. Then, the lock portion main body 43 and the second piston 41 are moved in the advance direction X1 by the urging force of the second spring 42.
- the lock portion main body 43 is engaged with the lock sleeve 16 by the fixing ring 61. Further, the lock sleeve 16 is engaged with the guide tube 12 by the engagement ring 93 when the lock sleeve 16 moves in the advancing direction X1. Therefore, as described above, when the lock portion main body 43 moves in the advance direction X1, the guide tube 12 and the first piston 31 to which the guide tube 12 is fixed also move in the advance direction X1. When the first piston 31 moves in the advance direction X1, as in the case of the fluid brake mechanism 30, the brake output unit 11 advances in the advance direction X1. That is, by discharging the compressed air supplied to the second pressure chamber S21, both the first piston 31 and the second piston 41 move in the advance direction X1. Thereby, the braking force by the parking spring brake mechanism 40 is generated.
- the first piston 31 moves in the retracting direction X2 due to the urging force of the first spring 32, and the brake output unit 11 moves in the retracting direction X2 as in the case of the fluid brake mechanism 30. That is, when the compressed air is supplied to the second pressure chamber S21, both the first piston 31 and the second piston 41 move in the retreat direction X2. Thereby, the brake by the parking spring brake mechanism 40 is released.
- FIG. 7 shows an enlarged view near the gap adjusting mechanism 50.
- the clearance adjustment mechanism 50 including the first clutch 13, the clutch nut 14, the front stopper 17, and the like has a clearance to the brake operation position when the brake is released due to wear of the brake pad 104 in the disc brake device 1. When it becomes larger, the gap is automatically adjusted.
- the parking brake manual release mechanism 60 is for manually releasing the brake by the parking spring brake mechanism 40 without supplying compressed air to the second pressure chamber S21.
- FIG. 8 is a cross-sectional view taken from the position indicated by arrows VIII-VIII in FIG. 3, in which components inside the lock sleeve 16 are omitted.
- This figure is a view for explaining the parking brake manual release mechanism 60.
- the parking brake manual release mechanism 60 includes a fixing ring 61, a closing member 62, an operating rod cylinder portion 63, and an operating rod 67.
- the fixing ring 61 is provided as a C-shaped member that is partially cut away in the circumferential direction. As a result, both end portions of the fixing ring 61 face each other through a slight gap, and are biased and held in a direction in which the gap becomes narrower. A pair of projecting portions 61 a projecting outward in the radial direction is formed at both ends of the fixing ring 61. As shown in FIGS. 4, 6, and 8, the fixing ring 61 has a radially inner portion fitted in the inner annular groove 16 a of the lock sleeve 16 and a radially outer portion fitted in the outer annular groove 47 b. It arrange
- the closing member 62 is formed as a plate-like member formed in a substantially rectangular shape in plan view.
- the closing member 62 has a pair of convex portions 62a that protrude in parallel from both sides of a portion corresponding to one side of the rectangle.
- the closing member 62 has a closing member space so that the pair of convex portions 62a can slide in the radial direction with respect to the lock portion main body 43 so as to sandwich the pair of protruding portions 61a of the fixing ring 61 from the outside. 48a.
- chamfered portions 62b are formed at the two corners where the pair of convex portions 62a are not formed.
- the operating rod cylinder portion 63 is formed in a substantially rectangular cylinder shape having a bottom portion 64. As shown in FIGS. 2 and 3, the operating rod cylinder portion 63 is a tangential direction of the second cylinder portion 23, and is approximately upward with respect to the horizontal direction when the brake cylinder device 2 is fixed to the vehicle body 120. It is formed so as to extend in the direction of 45 degrees. A through hole 64 a is formed in the center portion of the bottom portion 64. The opening of the operating rod cylinder portion 63 is sealed by a sealing portion 65. The operating rod cylinder portion 63 and the sealing portion 65 are bulged by the bolt 66 with the bottom portion 64 of the operating rod cylinder portion 63 disposed on the bulging portion 48 side of the second piston wall portion 47. It is fixed to.
- the operating rod 67 is a substantially rod-shaped member that is operated by the user in order to manually release the brake by the parking spring brake mechanism 40.
- the operation rod 67 is configured to be able to advance and retract in the axial direction of the operation rod 67 with respect to the cylinder 20.
- the operation rod 67 is arranged such that one of the planes including the advancing / retreating direction is parallel to the direction in which the railway vehicle extends.
- the operation rod 67 has a main body portion 68, a flange portion 69, and a pulling wheel 71.
- the main body 68 is provided as an elongated rod-shaped member.
- the main body 68 passes through the insertion hole 48 b of the second piston wall 47 and the inside of the operating rod cylinder 63.
- a chamfered portion 68 a is formed at the distal end portion of the main body portion 68.
- the chamfered portion 68 a is in surface contact with the chamfered portion 62 b of the closing member 62. Thereby, the main body 68 presses the closing member 62 toward the fixing ring 61.
- the flange portion 69 is formed integrally with the main body 68 in the vicinity of the middle portion in the longitudinal direction of the main body 68.
- the flange portion 69 is slidable in the axial direction of the main body portion 68 with respect to the inner peripheral surface of the operating rod cylinder portion 63.
- the flange portion 69 is urged toward the cylinder 20 by an urging spring 72 as an urging member housed in the operation rod cylinder portion 63.
- One end side of the biasing spring 72 is in contact with the sealing portion 65, and the other end side thereof is in contact with the flange portion 69.
- the pulling wheel 71 is attached to the base end of the main body 68 (the end on the side away from the cylinder 20).
- the pulling wheel 71 is provided as a grip part for the user to pull the operation rod 67 with respect to the cylinder 20.
- the pulling wheel 71 may be connected to a wire or the like and pulled from another place.
- a mark portion 73 is formed integrally with the base end portion of the main body portion 68.
- the mark portion 73 bulges outward from the outer peripheral surface of the main body portion 68 in an annular shape.
- the operating rod 67 moves away from the cylinder 20. Then, the chamfered portion 68a formed at the distal end portion of the operating rod 67 retreats and is separated from the chamfered portion 62b of the closing member 62, so that the force for urging the fixed ring 61 is lost, and as a result, the fixed ring 61 is expanded. To do.
- the fixing ring 61 shifts from a state where it is fitted to both the inner annular groove 16a and the outer annular groove 47b (see FIG. 6) to a state where it is fitted only to the outer annular groove 47b. Then, the engagement between the lock portion main body 43 and the lock sleeve 16 is released. At the same time, due to the interaction between the inclined surface of the protruding portion 61a of the fixing ring 61 and the inclined surfaces of the pair of convex portions 62a of the closing member 62, the closing member 62 moves to the outer side of the concentric circle of the brake cylinder shaft.
- the mark portion 73 formed on the operation rod 67 enters the recess 65a formed on the sealing portion 65, as shown by the solid line in FIG. It is out. Therefore, it is difficult to visually recognize the mark portion 73 from the outside.
- the mark portion 73 has advanced outward from the recess 65a as shown by the one-dot chain line in FIG. Become.
- the user visually recognizes that the first piston 31 and the second piston 41 are engaged by the fixing ring 61 in a state where the mark portion 73 is in the recess 65a (a state in the lock position). I can grasp. On the other hand, when the user moves the mark portion 73 outward from the recess 65a (in the release position), the parking spring is caused by the fact that the first piston 31 and the second piston 41 are not engaged. It can be grasped that the parking brake by the brake mechanism 40 is not generated and is in a manually opened state.
- FIG. 10 shows a cross-sectional view as viewed from the position of arrows XX in FIG. This figure is a view for explaining the indicator mechanism 80.
- the indicator mechanism 80 is for confirming whether or not the second pressure chamber S21 is filled with compressed air.
- the indicator mechanism 80 includes a bottomed cylindrical portion 81, an indicator main body 83, a coil spring 88 as an elastic member, and a communication path 89.
- the bottomed cylinder part 81 has a cylinder wall part 82 formed on the bulging part 28 of the second cylinder part 23. As shown in FIG. 2, the cylindrical wall portion 82 is formed so as to extend in the tangential direction of the second cylinder portion 23 and in the horizontal direction when the brake cylinder device 2 is fixed to the vehicle main body 120. Yes.
- the opening of the bottomed cylindrical portion 81 is sealed with a sealing portion 87.
- the sealing part 87 is fixed to the cylindrical wall part 82 with bolts.
- the indicator body 83 is formed in a substantially cylindrical shape extending in the axial direction of the cylindrical wall portion 82.
- the indicator main body 83 can advance and retreat in the axial direction of the cylindrical wall portion 82.
- the indicator body 83 is configured by integrally forming a piston portion 84, an indicator portion 85, and a spring insertion portion 86.
- the piston portion 84 is formed in a thick disk shape whose outer peripheral surface is slightly smaller in diameter than the inner peripheral surface of the cylindrical wall portion 82.
- the piston portion 84 is provided so as to be slidable in the axial direction with respect to the inner peripheral surface of the cylindrical wall portion 82 via the packing 84a.
- the inner space S3 of the bottomed cylindrical portion 81 is divided into two spaces by the piston portion 84. Specifically, the space closer to the sealing portion 87 than the piston portion 84 in the inner space S3 of the bottomed cylindrical portion 81 is provided as a pressure fluid space S31 in which compressed air as pressure fluid is supplied and discharged. On the other hand, a space closer to the bottom 81a than the piston portion 84 in the internal space S3 is provided as a coil spring accommodating space S32.
- the indicator portion 85 is formed in a substantially cylindrical shape extending from the piston portion 84 toward the opening side of the bottomed cylindrical portion 81.
- the indicator portion 85 is disposed on the bottomed tube portion 81 so that the center axis is coaxial with the center axis of the bottomed tube portion 81.
- the outer diameter of the indicator portion 85 is smaller than the inner diameter of the cylindrical wall portion 82.
- the indicator unit 85 is a plane including a straight line in which the indicator unit 85 advances and retreats, and a plane parallel to the direction in which the railway vehicle extends.
- the indicator unit 85 is a plane including a straight line in which the operation rod 67 extends and retracts in parallel. It is provided so as to be parallel to the flat surface.
- the spring insertion part 86 is formed in a cylindrical shape extending from the piston part 84 toward the bottom part 81a. The distal end portion of the spring insertion portion 86 is disposed so as to face the bottom portion 81 a of the bottomed cylindrical portion 81. The spring insertion part 86 is inserted into the coil spring 88.
- the coil spring 88 is accommodated in the coil spring accommodating space S32 so that the spring insertion portion 86 is inserted therein.
- One end of the coil spring 88 is in contact with the bottom 81 a of the bottomed cylindrical portion 81 and the other end is in contact with the piston portion 84.
- the coil spring 88 urges the indicator main body 83 toward the side away from the bottom 81a with respect to the bottom 81a.
- the communication path 89 is for communicating the pressure fluid space S31 with the second pressure chamber S21. Specifically, one side of the communication path 89 is connected to the pressure fluid space S31, and the other side is connected to the second pressure chamber S21.
- the indicator portion 85 of the indicator mechanism 80 is in a state of being advanced with respect to the bottomed cylindrical portion 81 (state in the advanced position) depending on whether compressed air is supplied to the second pressure chamber S21 of the parking spring brake mechanism 40. Or a retracted state (a state in the retracted position).
- the user places the second piston 41 on the advanced direction X1 side. I can grasp that.
- the second piston 41 is positioned on the retreat direction X2 side. Can be grasped.
- the brake cylinder device 2 includes a through cylinder 35.
- the through cylinder 35 is provided as a pipe formed in an L shape.
- the space inside the through cylinder 35 constitutes a second passage 35a through which air flows.
- One end side of the through cylinder 35 is fitted in a fitting hole 28 b formed in the bulging portion 28 of the second cylinder portion 23. Accordingly, the first spring accommodating space S12 communicates with the outside through the air passage 36 including the first passage 28a and the second passage 35a.
- the first spring housing space S12 communicates with the outside, the first spring housing space S12 is maintained at normal pressure. As a result, excessive pressure does not act on the first spring accommodating space S12 when the first piston 31 moves in the advancing direction X1. Thereby, it can prevent that the advance to the advance direction X1 of the 1st piston 31 is prevented.
- the second pressure chamber S21 and the second spring accommodating space S22 are arranged outside the second spring 42 that is a spring for parking brake.
- 2 pressure chamber S21 can be arrange
- the second piston cylinder portion 46 by disposing the second piston cylinder portion 46 outside the second spring 42 as described above, the second pressure chamber S21 and the second spring accommodating space S22 can be partitioned by the second piston cylinder portion 46. Accordingly, the second piston 41 can be advanced and retracted relative to the cylinder 20 by supplying and discharging compressed air to and from the second pressure chamber S21.
- the overall length of the brake cylinder device 2 can be shortened while suppressing an increase in the restriction of the design condition of the spring 42 for parking brake.
- the second spring accommodating space S22 is to be lengthened in the forward / backward direction of the brake output portion 11, it is desirable to provide the second support portion 25b in a region as close as possible to the partition portion 25 in the second space S2.
- the 2nd support part 25b is arrange
- the second support portion 25 b can be configured by the partition portion 25 that partitions the first space S ⁇ b> 1 and the second space S ⁇ b> 2, and thus the second spring 42 in the forward / backward direction of the brake output portion 11. Can be secured more reliably.
- the configuration of the cylinder 20 can be simplified.
- the first support portion 25 a can be configured by the partition portion 25. In this way, compared to the case where the first support portion 25a is provided separately from the partition portion 25 in the first space S1, the first spring accommodating space S12 can be made longer in the forward / backward direction of the brake output portion 11, so Arrangement space can be secured sufficiently. In addition, since it is not necessary to separately form the first support portion 25a, the configuration of the cylinder 20 can be simplified.
- the second piston 41 and the second piston cylinder portion 46 are formed separately and are engaged with each other during assembly. Specifically, the second piston cylinder part 46 of the lock part main body 43 is inserted into the second cylinder part 23 from the small diameter cylinder part 23c side (the advance direction X1 side) of the second cylinder part 23. Next, the second piston 41 is inserted between the second cylinder part 23 and the second piston cylinder part 46 from the large diameter cylinder part 23a side (retracting direction X2 side) of the second cylinder part 23.
- the assembly property of the brake cylinder device 2 can be improved by configuring the second piston 41 and the second piston cylinder portion 46 as separate members so that they can be engaged during assembly.
- the brake cylinder device 2 even when the water vapor becomes water droplets and adheres in the first passage 28a, the water droplets flow downward along the first passage 28a due to their own weight, and the first spring accommodating space. Move away from S12. Therefore, it is possible to prevent the cylinder 20 from rusting due to the water droplets entering and adhering to the cylinder 20.
- the brake cylinder device 2 even when water droplets accumulate in the lower portion of the first spring accommodating space S12, the region on the first spring accommodating space S12 side in the first passage 28a is the lower portion of the first spring accommodating space S12. Therefore, the water droplet can be guided to the first passage 28a. Thereby, the rust of the cylinder 20 can be further suppressed.
- the brake cylinder device 2 it can be grasped from the state of the indicator mechanism 80 whether the second piston 41 of the parking spring brake mechanism 40 is located on the advancing direction X1 side or the retracting direction X2 side.
- the indicator mechanism 80 is formed by mechanical components without using an electric system. Therefore, unlike the case where the state of the second piston 41 is grasped by measuring the pressure in the second pressure chamber S21 with a pressure sensor or the like, there is no fear of failure of the electrical system. Therefore, the position state of the second piston 41 can be reliably grasped.
- the pressure sensor when the pressure state of the second pressure chamber S21 is confirmed using a pressure sensor, the pressure sensor is generally removed from the brake cylinder device 2 due to problems such as restrictions on the routing of electrical wiring connected to the pressure sensor.
- the brake control device is disposed in a relatively distant position. However, in this case, it cannot be easily determined whether or not a predetermined pressure is applied to the second pressure chamber S21 in the vicinity of the brake cylinder device 2.
- the pressure state of the second pressure chamber S21 can be grasped by the indicator mechanism 80 formed of mechanical components. This eliminates the need for electrical wiring required in the case of a pressure sensor, thereby eliminating the above-described restrictions on the routing of electrical wiring. As a result, it becomes easy to attach the indicator mechanism 80 directly to the brake cylinder device 2. Therefore, it can be easily determined whether or not a predetermined pressure is applied to the second pressure chamber S21 in the vicinity of the brake cylinder device 2.
- the user confirms both the position of the indicator portion 85 (the advanced position or the retracted position) and the position of the operation rod 67 (the locked position and the released position), thereby enabling the parking spring brake mechanism.
- 40 states can be grasped. Specifically, the user can determine that the braking force by the parking spring brake mechanism 40 is generated when the indicator portion 85 is in the advanced position and the operation rod 67 is in the locked position. In addition, when the user is (b) when the indicator portion 85 is in the retracted position and the operating rod 67 is in the locked position, the braking force applied by the parking spring brake mechanism 40 due to the supply of compressed air to the second pressure chamber S21. It can be determined that no occurrence has occurred.
- the user can not only confirm whether or not the braking force is generated by the parking spring brake mechanism 40, but can also grasp the cause of the absence of the braking force at the same time.
- the user can simultaneously confirm the state of the indicator portion 85 and the state of the operation rod 67 from one direction. Therefore, the state of the parking spring brake mechanism 40 can be grasped in a relatively short time.
- the indicator portion 85 is such that one of the planes including the advance / retreat direction of the indicator portion 85 is parallel to one of the planes including the advance / retreat direction of the operation rod 67.
- the user can grasp both states in a shorter time and easily by viewing the indicator unit 85 and the operation rod 67 from the direction perpendicular to the plane parallel to each other as described above.
- the indicator unit 85 is arranged so that one of the planes including the straight line in which the indicator unit 85 advances and retreats is parallel to one of the planes including the straight line in which the operation rod 67 advances and retreats.
- the indicator unit 85 may be arranged so that one of the planes including the straight line in which the indicator unit 85 advances and retreats and one of the planes including the straight line in which the operation rod 67 advances and retreats are the same. Thereby, the state of the indicator part 85 and the operation rod 67 can be grasped
- one of the planes including the straight line in which the indicator unit 85 advances and retreats and one of the planes including the straight line in which the operation rod 67 advances and retreats may not be parallel or the same. It is sufficient if the position state of the rod 67 can be grasped.
- the angle formed by one of the planes including the straight line in which the indicator unit 85 advances and retreats and one of the planes including the straight line in which the operation rod 67 advances and retreats may be an angle other than an angle near 90 degrees.
- the present embodiment includes the brake cylinder device 2 configured to reduce the overall length while suppressing an increase in the design constraint of the parking brake spring (second spring 42).
- a disc brake device 1 can be provided. Therefore, the downsized disc brake device 1 can be provided.
- the first support portion 25a is configured by a portion of the partition portion 25 on the first space S1 side.
- the first support portion 25a is not limited to this and is separated from the partition portion 25.
- the second support portion 25b is configured by a portion of the partition portion 25 on the second space S2 side.
- the second support portion 25b may be formed.
- the region connected to the first spring accommodating space S12 in the air passage 36 is connected to the lower portion of the first spring accommodating space S12. You may connect with the center part in the up-down direction of space S12.
- the indicator mechanism 80 is configured such that the indicator portion 85 advances from the bottomed tubular portion 81 by the biasing force of the coil spring 88, but this is not restrictive. Specifically, you may comprise the indicator mechanism 80 so that the indicator part 85 may advance from the bottomed cylinder part 81 with the pressure fluid supplied to pressure fluid space S31.
- the pressure fluid space S31 is configured as a space closer to the bottom 81a than the piston portion 84 in the internal space S3
- the coil spring accommodating space S32 is defined as a space closer to the sealing portion 87 than the piston portion 84 in the internal space S3. What is necessary is just to comprise.
- the present invention can be used for a brake cylinder device in which both a fluid brake mechanism used during operation of a railway vehicle and a parking spring brake mechanism used during parking of the railway vehicle can be operated.
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Abstract
Description
図1は、本発明の実施形態に係る鉄道車両用のブレーキシリンダ装置2を備えたディスクブレーキ装置1を車軸方向から視た側面図である。ディスクブレーキ装置1は、ブレーキシリンダ装置2と、キャリパボディ100とを備えている。
次に、本発明の実施形態に係るブレーキシリンダ装置2について詳しく説明する。図2は、ブレーキシリンダ装置2を示す側面図である。また、図3は、図2に示すブレーキシリンダ装置2をIII方向から視た図である。また、図4は、図2のIV-IV矢視位置から視た断面図である。
シリンダ20は、シリンダ本体21と区画壁部24とを備えている。
流体ブレーキ機構30は、第1ピストン31と、第1バネ32と、第1圧力室S11とを備えている。
駐車バネブレーキ機構40は、第2ピストン41と、第2バネ42と、ロック部本体43と、第2圧力室S21とを備えている。
以下において、流体ブレーキ機構30及び駐車バネブレーキ機構40の基本的な動作について説明する。まず、流体ブレーキ機構30の基本動作について説明する。
図7に、隙間調整機構50付近の拡大図を示す。第1クラッチ13、クラッチナット14、前方ストッパ17等から構成される隙間調整機構50は、ディスクブレーキ装置1におけるブレーキパッド104の摩耗等によって、ブレーキが解除された状態におけるブレーキ動作位置までの隙間が大きくなった場合、その隙間を自動で調整するように構成されている。
駐車ブレーキ手動解除機構60は、駐車バネブレーキ機構40によるブレーキを、第2圧力室S21に圧縮空気を供給することなく、手動で解除するためのものである。
駐車ブレーキ手動解除機構60で駐車バネブレーキ機構40によるブレーキを解除する場合、ユーザが、引き輪71をシリンダ20と反対側へ引っ張ることで、駐車ブレーキを解除できる。
図10に、図3のX- X矢視位置から視た断面図を示す。この図は、インジケータ機構80を説明するための図である。インジケータ機構80は、第2圧力室S21に圧縮空気が満たされているか否かを確認するためのものである。インジケータ機構80は、有底筒部81と、インジケータ本体83と、弾性部材としてのコイルバネ88と、連通路89とを有している。
インジケータ機構80のインジケータ部85は、駐車バネブレーキ機構40の第2圧力室S21内に対する圧縮空気の供給の有無に応じて、有底筒部81に対して進出した状態(進出位置にある状態)となるか、又は後退した状態(後退位置にある状態)となる。
以上のように、本実施形態に係るブレーキシリンダ装置2によると、駐車ブレーキ用のバネである第2バネ42の外側に第2圧力室S21を配置することで、第2バネ収容空間S22及び第2圧力室S21を、ブレーキ出力部11の進退方向において重ならないよう配置できる。こうすると、第2バネ収容空間S22を進退方向に長くしようとした場合に第2圧力室S21が邪魔にならないため、第2バネ42の長さ方向の配置スペースを確保しやすくなる。その結果、第2バネ42の設計条件が極端に制限されない程度に第2バネ収容空間S22を短くできるため、その分、ブレーキシリンダ装置2の全長を短くできる。
2 ブレーキシリンダ装置
20 シリンダ
21 シリンダ本体
22a シリンダ底部
25 仕切部
25a 第1支持部
25b 第2支持部
30 流体ブレーキ機構
31 第1ピストン
32 第1バネ
40 駐車バネブレーキ機構
41 第2ピストン
42 第2バネ
46 第2ピストン筒部
S シリンダ空間
S1 第1空間
S11 第1圧力室
S12 第1バネ収容空間(第1バネの収容空間)
S2 第2空間
S21 第2圧力室
S22 第2バネ収容空間(第2バネの収容空間)
Claims (12)
- シリンダと、圧力流体によってブレーキ力を出力する流体ブレーキ機構と、鉄道車両の駐車時に用いられる駐車バネブレーキ機構と、を備えたブレーキシリンダ装置であって、
前記シリンダは、筒状に形成され一方側にシリンダ底部を有するシリンダ本体、及び、該シリンダ本体内のシリンダ空間を該シリンダ本体の筒軸方向における前記シリンダ底部側の第1空間とその反対側の第2空間とに仕切るように前記シリンダ本体に固定される仕切部、を有し、
前記流体ブレーキ機構は、前記第1空間に配置される第1ピストン、前記シリンダ本体に固定される第1支持部に一端が当接し前記第1ピストンを前記シリンダ底部に近づく退避方向へ付勢する第1バネ、及び、前記第1空間における、前記第1バネの収容空間に対して前記第1ピストンを挟んだ反対側の第1圧力室、を有し、該第1圧力室に圧力流体が供給されることで、前記第1バネの付勢力に抗して前記第1ピストンが前記シリンダ底部から離れる進出方向へ移動するように構成され、
前記駐車バネブレーキ機構は、前記第2空間に配置される第2ピストン、該第2ピストンから前記進出方向へ筒状に延びる第2ピストン筒部、前記シリンダ本体に固定される第2支持部に一端が当接し前記第2ピストンを前記第2ピストン筒部を介して前記進出方向へ付勢する第2バネ、及び、前記第2空間における、前記第2バネの収容空間に対して前記第2ピストン筒部を挟んだ反対側の第2圧力室、を有し、該第2圧力室に圧力流体が供給されている状態から排出される状態へと移行することで、前記第2バネの付勢力により前記第2ピストンが前記進出方向に移動するように構成され、
前記第2バネは、前記第2ピストン筒部の内側に配置され、
前記第2圧力室は、前記第2ピストン筒部の外側に配置されていることを特徴とする、ブレーキシリンダ装置。 - 請求項1に記載のブレーキシリンダ装置において、
前記第2支持部は、前記進出方向に進出した状態の前記第2ピストンにおける前記進出方向側の端部よりも前記仕切部側に配置されていることを特徴とする、ブレーキシリンダ装置。 - 請求項1又は請求項2に記載のブレーキシリンダ装置において、
前記第2支持部は、前記仕切部における前記第2空間側の部分であることを特徴とする、ブレーキシリンダ装置。 - 請求項1から請求項3のいずれか1項に記載のブレーキシリンダ装置において、
前記第1支持部は、前記仕切部における前記第1空間側の部分であることを特徴とする、ブレーキシリンダ装置。 - 請求項1から請求項4のいずれか1項に記載のブレーキシリンダ装置において、
前記第2ピストン及び前記第2ピストン筒部は、別体で形成されて互いに係合することを特徴とする、ブレーキシリンダ装置。 - 請求項1から請求項5のいずれか1項に記載のブレーキシリンダ装置において、
一方側の領域が前記第1バネの収容空間に繋がり該第1バネの収容空間を外部へ連通させるための通気路を備え、
前記通気路における前記一方側の領域は、鉄道車両に固定された状態の前記ブレーキシリンダ装置における、前記第1バネの収容空間側から水平方向に対して下方へ延びる第1通路であることを特徴とする、ブレーキシリンダ装置。 - 請求項6に記載のブレーキシリンダ装置において、
前記通気路における前記一方側の領域のうち前記第1バネの収容空間に繋がる領域は、鉄道車両に固定された状態の前記ブレーキシリンダ装置における前記第1バネの収容空間の下部に繋がっていることを特徴とする、ブレーキシリンダ装置。 - 請求項1から請求項7のいずれか1項に記載のブレーキシリンダ装置において、
底部を有する筒状に形成された有底筒部と、
前記有底筒部の筒軸方向に進退可能なように該有底筒部内に配置されるピストン部と、
前記ピストン部から前記有底筒部の開口側へ延びるように形成され、該有底筒部から進出することにより先端部が該有底筒部から露出する一方、該有底筒部へ後退することにより前記先端部が該有底筒部へ収容されるインジケータ部と、
前記ピストン部を前記筒軸方向の一方側へ付勢するように前記有底筒部内に配置される弾性部材と、
前記有底筒部の内部空間における前記ピストン部を挟んだ前記弾性部材と反対側の圧力流体空間を、前記第2圧力室に連通する連通路と
を有するインジケータ機構を更に備え、
前記インジケータ部は、前記連通路を介して前記圧力流体空間へ流入する圧力流体により、前記弾性部材の付勢力に抗して前記有底筒部から進出又は前記有底筒部へ後退することを特徴とする、ブレーキシリンダ装置。 - 請求項8に記載のブレーキシリンダ装置において、
駐車ブレーキ手動解除機構を更に備え、
前記弾性部材は、前記インジケータ部が前記有底筒部から進出する方向へ前記ピストン部を付勢するように前記有底筒部内に配置され、
前記インジケータ機構は、前記インジケータ部が前記弾性部材によって付勢されて前記有底筒部から進出する進出位置と、前記圧力流体空間に前記第2圧力室からの圧力流体が流入することで前記有底筒部へ後退する後退位置と、に切替可能に構成され、
前記駐車ブレーキ手動解除機構は、前記シリンダに対して進退可能な操作ロッドを有し、該操作ロッドが前記シリンダ側へ付勢部材の付勢力によって押し込まれた状態において前記第2ピストンに対する前記第1ピストンの係合を保持するロック位置と、前記操作ロッドが前記シリンダ側から引っ張られると前記第2ピストンに対する前記第1ピストンの係合を解除して駐車バネブレーキ機構によるブレーキを解除する解除位置と、に切替可能に構成されていることを特徴とする、ブレーキシリンダ装置。 - 請求項9に記載のブレーキシリンダ装置において、
前記操作ロッド及び前記インジケータ部は、前記操作ロッドにおける前記ロック位置と前記解除位置との判別、及び、前記インジケータ部における前記進出位置と前記後退位置との判別が、少なくとも一方向から視て同時に可能なように設置されていることを特徴とする、ブレーキシリンダ装置。 - 請求項10に記載のブレーキシリンダ装置において、
前記インジケータ部は、該インジケータ部の進退する直線を含む平面の1つが前記操作ロッドの進退する直線を含む平面の1つと同一又は平行となるように設置されていることを特徴とする、ブレーキシリンダ装置。 - 請求項1から請求項11のいずれか1項に記載のブレーキシリンダ装置と、
前記ブレーキシリンダ装置が装備されるとともに車両に対して取り付けられるキャリパボディと、を備え、
前記ブレーキシリンダ装置が作動することで、前記キャリパボディに取り付けられた一対のブレーキパッドにより車軸側のディスクを挟み込んで制動力を発生させることを特徴とする、ディスクブレーキ装置。
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JP2008261439A (ja) * | 2007-04-12 | 2008-10-30 | Nabtesco Corp | ブレーキシリンダ装置及びブレーキキャリパ装置 |
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JP7244454B2 (ja) | 2020-04-08 | 2023-03-22 | 三菱重工エンジニアリング株式会社 | ブレーキアクチュエータ装置 |
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