CN112443606A - Brake device and railway vehicle - Google Patents

Abstract

The invention provides a brake device and a railway vehicle. A brake device (100) is provided with: a spring brake mechanism (240) that generates a braking force by pressing a brake pad (302) against a member (12) to be pressed with a spring force; and a manual brake release device (400) that releases the braking force by preventing the transmission of the spring force to the brake pad (302), wherein the spring brake mechanism (240) is provided with a plurality of cable portions (420) of the manual brake release device (400).

Description

Brake device and railway vehicle

Technical Field

The present invention relates to a brake device and a railway vehicle.

Background

The following braking devices are known: a brake pad is pressed against a tread surface of a wheel of a railway vehicle, thereby applying a braking force to the wheel (see, for example, patent document 1). The brake device described in patent document 1 includes: a fluid brake mechanism that generates braking force using fluid; and a spring brake mechanism that generates braking force using a spring. The brake device further includes a manual brake release device for releasing the braking force of the spring brake mechanism by manual operation.

A lock member of the brake manual release device, which projects from the cylinder main body, is connected to the operating portion by a cable portion. When the operating section is pulled, the lock member is pulled out of the cylinder body, and the braking force of the spring brake mechanism is released.

Documents of the prior art

Patent document

Patent document 1: international publication No. 2014/42031

Disclosure of Invention

However, the brake device as described above is provided beside the wheel. Therefore, when an operator located on one side of the railway vehicle manually releases the spring brake mechanism on the other side, the operator must go around to the opposite side of the railway vehicle, and it is desirable to improve the work efficiency. The same problem is also present in brake devices such as caliper brakes and track brakes, as well as brake devices that generate braking force by contacting the tread surface of the wheel.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a brake device and a railway vehicle capable of improving work efficiency when releasing braking force of a spring brake mechanism by manual operation.

The brake device for solving the above problems includes: a spring brake mechanism that generates a braking force by pressing a brake friction member against a pressed member with a spring force; and a releasing unit configured to release the braking force by preventing transmission of a spring force to the braking friction member, wherein the plurality of releasing units are provided for the spring brake mechanism.

According to this configuration, the spring brake mechanism is provided with a plurality of release portions, and the braking force can be released by operating these release portions. Further, since the release portions are provided on both sides of the railway vehicle, when the operator on one side of the railway vehicle manually releases the spring brake mechanism on the other side, the operator does not have to go around the opposite side of the railway vehicle, and the work efficiency can be improved.

In the above-described brake device, the plurality of release portions may include at least two cable portions. According to this configuration, the plurality of releasing portions to be pulled out to both sides of the railway vehicle can be operated by the at least two cable portions. Therefore, the cable portion can be extended to the position where the operation is performed, and therefore, the braking force can be released without coming close to the spring brake mechanism, and the work efficiency can be improved.

In the above braking device, the releasing unit may include a lever unit provided between the cable unit and the spring brake mechanism, and the lever unit may include: a fulcrum portion that supports the lever portion so as to be rotatable about a rotation axis; a force point portion connected with the cable portion; and an action point portion connected to the spring brake mechanism.

According to this configuration, since the lever portion is provided between the cable portion and the spring brake mechanism, the force point portion is connected to the cable portion, the action point portion of the lever portion is connected to the spring brake mechanism, and the fulcrum portion of the lever portion is supported by the rotation shaft, 1 member for supporting a plurality of lever portions may be provided.

In the above brake device, the lever portion may be a rod-shaped member having an operating point, and both ends of the rod-shaped member may be connected to the two cable portions, respectively.

According to this configuration, when the cable portion is operated, the rod-like member can be rotated at the fulcrum portion to drive the operating point.

In the above-described brake device, a distance from the fulcrum portion to the force point portion may be longer than a distance from the fulcrum portion to the action point portion. According to this configuration, since the distance between the fulcrum portion and the force point portion is longer than the distance between the fulcrum portion and the action point portion, the force required for the operation can be reduced with respect to the force required for the action.

The railway vehicle to solve the above problem includes the brake device, and the release portion is disposed on both sides of the railway vehicle.

According to this configuration, the braking force can be released by operating the release portions disposed on both sides of the railway vehicle. Therefore, when the operator located on one side of the railway vehicle manually releases the spring brake mechanism on the other side, the operator does not need to go around the opposite side of the railway vehicle, and the work efficiency can be improved.

The railway vehicle to solve the above problem includes the brake device, and the cable portion is disposed so as to pass over a bogie of the railway vehicle.

According to this configuration, the spring brake mechanism is provided with a plurality of release portions, and the braking force can be released by operating these release portions. Further, by providing the release portions on both sides of the railway vehicle, when the operator on one side of the railway vehicle manually releases the spring brake mechanism on the other side, the operator does not have to go around the opposite side of the railway vehicle, and the work efficiency can be improved. Further, since the cable portion passes over the bogie, the amount of foreign matter adhering to the cable portion during running of the railway vehicle can be suppressed.

According to the present invention, the work efficiency when the braking force of the spring brake mechanism is released by a manual operation can be improved.

Drawings

Fig. 1 is a plan view of embodiment 1 of the brake device.

Fig. 2 is a sectional view of the brake device of embodiment 1.

Fig. 3 is a sectional view of the brake cylinder device.

Fig. 4 is a front view of the brake manual release device of embodiment 1.

Fig. 5 is a side view of a coupling portion of the manual brake release device according to embodiment 1.

Fig. 6 (a) and (b) are front views of the manual brake release device according to embodiment 1.

Fig. 7 is a view of a connecting portion of the manual brake release device according to embodiment 2, where (a) is a side view and (b) is a front view.

Fig. 8 is a side view of a coupling portion of the manual brake release device of embodiment 2.

Fig. 9 is a side view of a coupling portion of the manual brake release device of embodiment 3.

Fig. 10 is a front view of a coupling portion of the brake manual release device of embodiment 3.

Fig. 11 (a) and (b) are side views of the connecting portion of the manual brake release device according to embodiment 3.

Fig. 12 (a) and (b) are front views of the coupling portion of the manual brake release device according to embodiment 3.

Fig. 13 is a side view of a coupling portion of the manual brake release device according to embodiment 4.

Fig. 14 (a) and (b) are side views of the connecting portion of the manual brake release device according to embodiment 4.

Fig. 15 is a side view of a coupling portion of the manual brake release device according to embodiment 5.

Fig. 16 (a) and (b) are sectional views of a connecting portion of the manual brake release device according to embodiment 5.

Fig. 17 is a side view of a connecting portion of the manual brake release device according to embodiment 6.

Fig. 18 (a) and (b) are sectional views of a connecting portion of the manual brake release device according to embodiment 6.

Description of the reference numerals

10. A railway vehicle; 11. an axle; 12. a wheel as a pressed member; 100. a braking device; 240. a spring brake mechanism; 281. a locking member; 284. a ring member; 302. a brake pad as a friction member for braking; 400. a brake manual release device as a release portion; 410. an operation section; 411. a grip portion; 412. 1 st installation part; 413. an operation side bracket; 414. 415, a nut; 416. 1 st expansion part; 420. a cable portion; 421. an outer cable; 422. an inner cable; 423. a connecting member; 430. a connecting portion; 434. a lever member; 434A, a shaft portion as a fulcrum portion; 434B, a 1 st extension part as a force point part; 434C, a 2 nd extending part as an action point part; 434D, a through hole; 438. a balancing bar; 441. a rotating shaft; 442. a 2 nd mounting part; 443. connecting the side brackets; 444. 445, a nut; 446. a 2 nd expansion part; 447. a force application spring; 450. an abutting portion; 460. a transmission member; 461. a rotating shaft; 462. 1 st end part; 463. a 2 nd end portion; 470. an abutting portion; 523. a connecting member; 542. a 2 nd mounting part; 543. connecting the side brackets; 544. 545, a nut; 546. a 2 nd expansion part; 547. a force application spring; 600. a relay mechanism; 610. a housing; 620. a moving member; 630. a caulking member; 650. connecting a cable; 660. a caulking member; 700. a relay mechanism; 710. a housing; 720. a cable pin; 730. a roller; 740. a coupling pin; 750. a connecting plate; 760. a caulking member; 770. and connecting the cable.

Detailed Description

(embodiment 1)

Embodiment 1 of the brake device will be described with reference to fig. 1 to 6.

As shown in fig. 1, the brake device 100 is a device that applies braking force to wheels 12 provided at both ends of an axle 11 of a railway vehicle 10. The braking device 100 includes: brake cylinder device 200, brake output 300, and manual brake release device 400. The manual brake release device 400 includes cable portions 420 extending in pairs toward both sides in the axial direction of the axle 11. The cable portion 420 is disposed so as to pass over the bogie.

As shown in fig. 2 and 3, the brake cylinder device 200 includes: a cylinder main body 210, a rod supporting mechanism 220, a fluid brake mechanism 230, a spring brake mechanism 240, and a lock mechanism 280. Brake cylinder device 200 is configured as follows: the fluid brake mechanism 230 and the spring brake mechanism 240 can be operated by supplying and discharging compressed air as a pressure fluid.

The cylinder main body 210 is formed in a cylindrical shape and is provided so as to be fixed to a bogie of the railway vehicle 10. The rod support mechanism 220, the fluid brake mechanism 230, the spring brake mechanism 240, and the lock mechanism 280 are housed inside the cylinder main body 210.

The lever support mechanism 220 includes: an outer casing 221, an inner casing 222, a fixed roller 223, a movable roller 224, and a return spring 225.

The outer case 221 is composed of two case units 221a and 221 b. The housing units 221a and 221b are cylindrical and are combined in series along the axial direction of the rod 226. The housing units 221a and 221b are supported to be movable in the axial direction of the rod 226 with respect to the cylinder main body 210.

The inner case 222 is housed inside the outer case 221. A screw hole 228 to which a screw portion 227 formed on the outer peripheral surface of the rod 226 is screwed is formed in the inner peripheral surface of the inner housing portion 222. The relative position of the rod 226 with respect to the inner housing portion 222 is displaced by displacing the screw engagement position of the screw portion 227 with respect to the screw hole 228.

The fixed roller 223 is supported rotatably with respect to the cylinder main body 210. The movable roller 224 is supported rotatably with respect to the outer casing 221. The rollers 223 and 224 are arranged so as to be spaced apart in the axial direction of the rod 226.

The return spring 225 is disposed in a compressed state inside the cylinder main body 210. The 1 st end of the return spring 225 abuts against the inner wall of the cylinder main body 210, and the 2 nd end of the return spring 225 abuts against the tip of the outer housing part 221. The return spring 225 biases the inner case 222 and the rod 226 screwed to the inner case 222 to retract into the cylinder body 210 together with the outer case 221.

The fluid brake mechanism 230 includes: a 1 st pressure chamber 231, a 1 st spring 232, and a 1 st piston 233. The fluid brake mechanism 230 is operated by supply and discharge of compressed air as a fluid, and is used for braking during operation of the railway vehicle 10.

The 1 st pressure chamber 231 is formed by dividing the inside of the cylinder main body 210 by the 1 st piston 233. The 1 st pressure chamber 231 communicates with the 1 st port 234 provided in the cylinder main body 210. The 1 st port 234 is connected to a 1 st compressed air supply source (not shown). The compressed air supplied from the 1 st compressed air supply source is supplied to the 1 st port 234 via a brake control device (not shown) that operates based on a command from a higher-level controller (not shown). The compressed air supplied from the 1 st port 234 to the 1 st pressure chamber 231 of the cylinder main body 210 is discharged from the 1 st port 234 via the brake control device based on a command from the controller.

The 1 st spring 232 is disposed in a region defined by the 1 st piston 233 in the cylinder main body 210, and is disposed to face the 1 st pressure chamber 231 through the 1 st piston 233. The 1 st spring 232 is disposed in a compressed state inside the cylinder main body 210. The 1 st end of the 1 st spring 232 abuts the 1 st piston 233 to bias the 1 st piston 233. The 2 nd end of the 1 st spring 232 is supported in contact with a spring receiving plate 235 fixed to the inner wall of the cylinder main body 210.

The 1 st piston 233 is disposed so as to be capable of reciprocating inside the cylinder main body 210. The 1 st end of the 1 st piston 233 is pressed by the compressed air supplied from the 1 st port 234 to the 1 st pressure chamber 231. By supplying the compressed air to the 1 st pressure chamber 231, the brake operating direction (downward direction in fig. 2 and 3) is moved against the biasing force of the 1 st spring 232.

As shown in fig. 3, a base end portion 236a of the rod driving portion 236 is fixed to the 2 nd end portion of the 1 st piston 233. A tapered wedge portion 236b is formed at the tip of the lever driving portion 236. The wedge 236b of the lever driving portion 236 is inserted between the fixed roller 223 and the movable roller 224. When the 1 st piston 233 moves in the brake actuation direction, the rod driving unit 236 moves in the brake actuation direction integrally with the 1 st piston 233. When the lever driving unit 236 moves in the brake actuation direction, the wedge 236b of the lever driving unit 236 biases the movable roller 224 in a direction away from the fixed roller 223. Also, since the movable roller 224 is away from the fixed roller 223, the rod 226 moves toward the wheel 12. As a result, the brake pad 302, which is a brake friction member held by the brake pad head 301 connected to the distal end of the rod 226, abuts against the tread surface 12a of the wheel 12 of the railway vehicle 10, which is a pressed member, and applies a braking force.

The spring brake mechanism 240 includes: a 2 nd pressure chamber 241, a 2 nd spring 242, a 2 nd piston 243, a shaft portion 244, and a transmission mechanism 260. The spring brake mechanism 240 is used to maintain a stopped state when the railway vehicle 10 is stopped in order to generate a braking force by the 2 nd spring 242.

The 2 nd pressure chamber 241 is formed by dividing the inside of the cylinder main body 210 by the 2 nd piston 243. The 2 nd pressure chamber 241 communicates with the 2 nd port 246 provided in the cylinder main body 210. The 2 nd port 246 is connected to a 2 nd compressed air supply source (not shown). The compressed air supplied from the 2 nd compressed air supply source is supplied to the 2 nd port 246 via the brake control device that operates based on a command from the controller. The compressed air supplied from the 2 nd port 246 to the 2 nd pressure chamber 241 of the cylinder main body 210 is discharged from the 2 nd port 246 via the brake control device based on a command from the controller.

The 2 nd spring 242 is disposed in a region defined by the 2 nd piston 243 in the cylinder main body 210 so as to face the 2 nd pressure chamber 241 through the 2 nd piston 243. The 2 nd spring 242 is disposed in a compressed state inside the cylinder main body 210. The 1 st end of the 2 nd spring 242 abuts against and is supported by the inner wall of the end of the cylinder main body 210. Further, the 2 nd end portion of the 2 nd spring 242 abuts against the 2 nd piston 243 to bias the 2 nd piston 243.

The 2 nd piston 243 is disposed to be capable of reciprocating inside the cylinder main body 210. The 1 st end of the 2 nd piston 243 is pressed by the compressed air supplied from the 2 nd port 246 to the 2 nd pressure chamber 241. The second pressure chamber 241 is supplied with compressed air, and is configured to move in a direction opposite to the brake actuation direction (upward direction in fig. 2 and 3) against the biasing force of the second spring 242. On the other hand, by discharging the compressed air supplied to the 2 nd pressure chamber 241 through the 2 nd port 246, the 2 nd piston 243 moves in the brake actuation direction (downward direction in fig. 2 and 3) due to the biasing force of the 2 nd spring 242.

Therefore, the spring brake mechanism 240 is configured to move the 2 nd piston 243 in the brake actuation direction by the biasing force of the 2 nd spring 242 by shifting from a state in which compressed air is supplied to the 2 nd pressure chamber 241 to a state in which compressed air is discharged.

The shaft 244 includes a main shaft 250 and a bearing 251. The shaft 244 is coupled to the 1 st piston 233 at an end of the main shaft 250 and is displaced together with the 1 st piston 233.

The main shaft 250 is a shaft-shaped member formed separately from the 1 st piston 233, and projects in the brake release direction when viewed from the 1 st piston 233. The main shaft 250 transmits the urging force applied from the 2 nd spring 242 through the 2 nd piston 243 to the 1 st piston 233 together with a transmission mechanism 260 to be described later.

In addition, an annular convex portion 250a is provided at the 1 st end portion of the main shaft 250 coupled to the 1 st piston 233. A recess 234a is provided at a radially central portion of the 1 st piston 233. When the 1 st piston 233 moves in the brake actuation direction, the concave portion 234a of the 1 st piston 233 engages with the convex portion 250a of the end portion of the main shaft 250, and biases the main shaft 250 in the brake actuation direction.

The bearing 251 is provided as, for example, a spherical member, and receives a thrust load acting on the main shaft 250 due to a biasing force applied from the 2 nd spring 242 through the 2 nd piston 243. The bearing 251 is disposed in the recess 236c, the recess 236c is formed in the base end portion 236a of the lever driving portion 236, and the bearing 251 is interposed between the 1 st end portion of the main shaft 250 and the base end portion 236a of the lever driving portion 236.

The transmission mechanism 260 is a mesh-type clutch mechanism that transmits the biasing force in the brake actuation direction of the 2 nd piston 243 to the shaft portion 244 that is displaced together with the 1 st piston 233. The transmission mechanism 260 includes: thread portion 261, clutch wheel 262, clutch sleeve 263 and clutch case 264. Further, a cylindrical portion 265 is provided radially inside the 2 nd piston 243. The transmission mechanism 260 is disposed inside the cylindrical portion 265.

The screw portion 261 is an external screw portion formed on the outer periphery of the main shaft 250, and is disposed on the 2 nd end portion side of the main shaft 250 opposite to the 1 st end portion, and the 1 st end portion is coupled to the 1 st piston 233.

The clutch pulley 262 is a cylindrical nut member screwed to the screw portion 261, and is disposed concentrically with the main shaft 250. An internal thread portion screwed to the thread portion 261 is provided on an inner peripheral portion of the clutch pulley 262. The clutch pulley 262 is disposed inside a clutch case 264 formed in a cylindrical shape, and is supported rotatably via a bearing 266 so as to be restricted from moving relative to the clutch case 264 in the axial direction of the shaft portion 244. Thus, the clutch pulley 262 can be displaced relative to the main shaft 250 in the axial direction while changing the relative position of the threaded engagement with the threaded portion 261.

The clutch sleeve 263 is a cylindrical member and is disposed inside the clutch case 264. Clutch sleeve 263 is supported to be movable relative to clutch case 264 in a direction parallel to the axial direction of spindle 250. The 1 st end of the clutch sleeve 263 at the tip in the clutch operation direction is disposed to face the 1 st end of the clutch pulley 262 at the tip in the brake release direction.

A rotation stop mechanism is provided between the 1 st end of the clutch sleeve 263 and the 1 st end of the clutch pulley 262. The rotation stopping mechanism is composed of concave-convex teeth 263a provided at the 1 st end of the clutch sleeve 263 and concave-convex teeth 262a provided at the 1 st end of the clutch wheel 262.

When the 2 nd piston 243 moves in the brake operation direction and moves relative to the main shaft 250, the clutch sleeve 263 also moves relative to the main shaft 250 together with the 2 nd piston 243. When the clutch sleeve 263 abuts against the clutch wheel 262, the concave-convex teeth 262a of the clutch wheel 262 mesh with the concave-convex teeth 263a of the clutch sleeve 263, and relative rotation between the clutch sleeve 263 and the clutch wheel 262 is restricted.

Further, a 2 nd end portion of the clutch sleeve 263 located at the tip end in the clutch release direction is supported by an end portion of the 2 nd piston 243 via a bearing 267. The bearing 267 supports the 2 nd end of the clutch sleeve 263 so as to be rotatable about the central axis of the main shaft 250 with respect to the 2 nd piston 243, and transmits the biasing force of the 2 nd piston 243 to the clutch sleeve 263.

The clutch case 264 is a cylindrical member, and houses the screw portion 261, the clutch wheel 262, and the clutch sleeve 263. The clutch case 264 is disposed between the cylindrical portion 265 of the cylinder main body 210 and the 2 nd piston 243 inside the cylinder main body 210. The clutch case 264 is supported by the cylindrical portion 265 and the 2 nd piston 243 so as to be slidable in a direction parallel to the axial direction of the main shaft 250. The clutch case 264 is slidable in the circumferential direction of the cylinder main body 210 with respect to the cylindrical portion 265 of the cylinder main body 210 and the 2 nd piston 243 without being engaged with the locking member 281 of the lock mechanism 280, which will be described later. Further, the locking member 281 corresponds to a releasing member.

The locking mechanism 280 is the following: the spring brake mechanism 240 is set to a locked state, and the braking force of the spring brake mechanism 240 is released by releasing the locked state. The lock mechanism 280 has a lock member 281 and a lock urging spring 282.

The locking member 281 is disposed in a region defining the 1 st pressure chamber 231 and the 2 nd pressure chamber 241 in the cylinder main body 210. The lock member 281 is rod-shaped and arranged to extend in the radial direction of the cylinder main body 210. In addition, the 1 st end of the locking member 281 protrudes to the outside of the cylinder main body 210. Further, the cover member 283 that closes the gap between the 1 st end portion of the locking member 281 and the cylinder main body 210 prevents the locking member 281 from falling out of the cylinder main body 210. The 2 nd end of the locking member 281 is a stepped portion that is widened from the other portions of the locking member 281.

The lock biasing spring 282 is interposed between the 2 nd end portion of the lock member 281 and the cover member 283, and biases the lock member 281 toward the inside of the cylinder main body 210. The lock blade 281a formed on the distal end surface of the 2 nd end portion of the lock member 281 engages with the clutch case 264 of the transmission mechanism 260 based on the biasing force from the lock biasing spring 282. Thereby, the relative displacement of the shaft portion 244 with respect to the 2 nd piston 243 during the operation of the spring brake mechanism 240 is restricted, and the braking force of the spring brake mechanism 240 is maintained.

As shown in fig. 2, the brake output unit 300 includes a brake pad head 301 and a brake pad 302. The pad head 301 is a member for holding the pad 302, and is supported to be swingable with respect to the distal end portion of the rod 226. The brake pad head 301 is supported to be swingable with respect to a hanger member 303, and the hanger member 303 is coupled to the cylinder main body 210 to be swingable with respect to the cylinder main body 210. The front end surface of the brake pad 302 on the opposite side of the surface held by the brake pad head 301 functions as a braking surface that can be brought into contact with the tread surface 12a of the wheel 12 of the railway vehicle 10.

Next, the manual brake release device 400 will be described.

As shown in fig. 4, the brake manual release apparatus 400 is an apparatus that operates the lock mechanism 280 (lock member 281) by manual operation. The brake manual release device 400 releases the braking force of the spring brake mechanism 240 by releasing the locked state of the spring brake mechanism 240 by the lock mechanism 280. The manual brake release device 400 includes: an operation portion 410, a cable portion 420, and a connection portion 430. The operating unit 410 is connected to the 1 st end of the cable unit 420. Further, a connection portion 430 is connected to the 2 nd end of the cable portion 420.

The cable part 420 includes a hollow outer cable 421 and an inner cable 422 penetrating the outer cable 421. The inner cable 422 is longer than the outer cable 421, and protrudes from both ends of the outer cable 421.

A 1 st mounting portion 412 is fixed to a 1 st end of the outer cable 421. A male screw is formed on the outer periphery of the 1 st mounting part 412. An operation side bracket 413 for fixing the cable part 420 is attached to the 1 st attaching part 412. The operation side bracket 413 is annularly attached to the 1 st mounting part 412. Two nuts 414 and 415 are fastened to the 1 st mounting part 412, and the operation side bracket 413 is sandwiched between the two nuts 414 and 415.

The 1 st end of the inner cable 422 is connected to the operation portion 410. The operation unit 410 includes a grip 411 that is gripped when the manual brake release device 400 is operated. The part of the 1 st end of the inner cable 422 protruding from the outer cable 421 is covered with the 1 st bellows 416 having a bellows shape. When the operation portion 410 is pulled, the 1 st end portion side of the inner cable 422 protrudes by a longer amount, and therefore the 1 st expansion/contraction portion 416 is extended. On the other hand, if the operation portion 410 is not pulled, the 1 st expansion/contraction portion 416 is shortened because the amount of projection of the inner cable 422 on the 1 st end portion side is shortened.

A 2 nd mounting portion 442 is fixed to a 2 nd end portion of the outer cable 421. A male screw is formed on the outer circumference of the 2 nd fitting part 442. A connection side bracket 443 for fixing the cable part 420 is attached to the 2 nd attaching part 442. The connecting bracket 443 is annularly mounted to the 2 nd mounting portion 442. Two nuts 444 and 445 are fastened to the 2 nd mounting portion 442, and the connecting side support 443 is sandwiched between the two nuts 444 and 445.

Specifically, as shown in fig. 5, two through holes (not shown) penetrating in the thickness direction are formed in the connecting bracket 443. The two cable portions 420 of the manual brake release device 400 pass through the corresponding through holes of the connecting side frames 443.

As shown in fig. 4, a U-shaped connecting member 423 is fixed to the 2 nd end of the inner cable 422. An urging spring 447 is attached between the 2 nd attaching portion 442 and the connecting member 423 in a state of being looped around the inner cable 422. The biasing spring 447 is covered with a corrugated 2 nd expansion/contraction portion 446. The biasing spring 447 biases the 2 nd mounting portion 442 in a direction to separate from the connecting member 423, and the 2 nd expansion/contraction portion 446 is extended. When the operation part 410 is pulled, the 2 nd expansion part 446 is shortened because the amount of projection of the inner cable 422 on the 2 nd end part side is shortened. On the other hand, if the operation portion 410 is not pulled, the 2 nd expansion/contraction portion 446 expands because the amount of protrusion of the inner cable 422 on the 2 nd end portion side increases.

The connecting portion 430 is connected to a connecting member 423 provided at the 2 nd end of the inner cable 422. The connecting portion 430 includes a lever member 434. The lever member 434 is attached to the support portion 211 provided on the cylinder main body 210 by a rotation shaft 441 so as to be rotatable with respect to the support portion 211. A ring member 284 is attached to the lock member 281. The lever member 434 is hooked to the ring member 284 and coupled to the locking member 281 of the locking mechanism 280 by the ring member 284. That is, two cable portions 420 of the brake manual release device 400 are provided for the lock mechanism 280.

The lever member 434 is provided for each cable portion 420. That is, two of the left lever member 434L and the right lever member 434R are hooked to the ring member 284. The left lever member 434L and the right lever member 434R are line-symmetrical in shape.

The lever member 434 includes a cylindrical shaft portion 434A that is fitted around the rotation shaft 441. The lever member 434 includes: a 1 st extending portion 434B extending from one end of the shaft portion 434A near the support portion 211 and coupled to the connecting member 423; and a 2 nd extending portion 434C extending from the other end portion of the shaft portion 434A and coupled to the ring member 284.

The tip of the 1 st extension 434B of the lever member 434 is coupled to the U-shaped connecting member 423. The connecting member 423 and the lever member 434 can be coupled by sandwiching the 1 st extending portion 434B of the lever member 434 by the U-shaped portion of the connecting member 423 and inserting the pin 437 therethrough. The top end of the 1 st extension 434B of the lever member 434 corresponds to a force point portion.

As shown in fig. 4, the lever member 434 is integrally formed in a state of having a fulcrum portion, a force point portion, and an action point portion.

The fulcrum portion of the lever member 434 is a shaft portion 434A looped to the rotation shaft 441, and the rotation shaft 441 is fixed to the support portion 211 of the cylinder main body 210. Lever member 434 is supported so as to be rotatable about rotation shaft 441 with respect to support portion 211 about a fulcrum portion of lever member 434.

The force point portion of the lever member 434 is an end portion of the 1 st extension 434B coupled to the connecting member 423 by the pin 437. When the operation portion 410 provided at the 1 st end of the cable portion 420 is operated, the operation force input through the operation portion 410 is transmitted to the force point portion of the lever member 434 via the cable portion 420.

The point of action portion of the lever member 434 is the end of the 2 nd extension 434C that is joined with the ring member 284 of the locking member 281.

As shown in fig. 6 (a), the operating point portion of the lever member 434 is pulled by the lock member 281 via the ring member 284 in the initial state of the manual release device 400, and the lock member 281 is biased toward the inside of the cylinder main body 210. Thereby, the lever member 434 is urged so that the point of action of the lever member 434 is drawn into the cylinder main body 210 about the fulcrum portion of the lever member 434. The distance from the fulcrum portion to the force point portion is longer than the distance from the fulcrum portion to the action point portion.

Here, as shown in fig. 6 (B), the operation force inputted via the operation portion 410 is transmitted to the end of the 1 st extension portion 434B, which is the force point portion of the lever member 434, via the cable portion 420. At this time, the lever member 434 rotates the end of the 2 nd extending portion 434C, which is the working point portion of the lever member 434, in a direction away from the rotation shaft 441 around the shaft portion 434A, which is the fulcrum portion of the lever member 434. The rotational force of the lever member 434 is transmitted from the end of the 2 nd extending portion 434C, which is the point of action of the lever member 434, to the locking member 281 via the ring member 284.

Thus, the lock member 281 is pulled out toward the outside of the cylinder main body 210, and the lock blade 281a provided on the tip end surface of the lock member 281 is separated from the clutch case 264 of the transmission mechanism 260. As a result, relative displacement of the shaft portion 244 with respect to the 2 nd piston 243 during operation of the spring brake mechanism 240 is permitted, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 1, the following effects can be obtained.

(1) The spring brake mechanism 240 is provided with a plurality of cable portions 420 of the manual brake release device 400, and the braking force can be released by operating the cable portions 420. Further, by providing the cable portions 420 on both sides of the railway vehicle 10, when the operator on one side of the railway vehicle 10 manually releases the spring brake mechanism 240 on the other side, the operator does not have to go around the opposite side of the railway vehicle 10, and the work efficiency can be improved.

(2) The brake manual release device 400 can be operated by the two cable portions 420. Therefore, the brake force can be released without approaching the spring brake mechanism 240 because the brake force can be extended to the position where the cable part 420 is operated, and the work efficiency can be improved.

(3) A 1 st extension portion 434B serving as a force point portion is connected to the lever member 434 between the cable portion 420 and the spring brake mechanism 240, a 2 nd extension portion 434C serving as an action point portion of the lever member 434 is connected to the lock member 281 of the spring brake mechanism 240, and a shaft portion 434A serving as a fulcrum portion of the lever member 434 is supported by the rotation shaft 441, so that 1 member for supporting the plurality of lever members 434 may be provided.

(4) Since the cable portion 420 passes over the bogie, the amount of foreign matter adhering to the cable portion 420 during traveling of the railway vehicle 10 can be suppressed.

(embodiment 2)

Next, embodiment 2 of the braking device will be described with reference to fig. 7 and 8. The structure of the connecting portion of the manual brake release device according to embodiment 2 is different from that according to embodiment 1. Therefore, in the following description, the configuration different from embodiment 1 will be mainly described, and the same configuration as embodiment 1 will not be described redundantly.

As shown in fig. 7 (a) and (b), a U-shaped connecting member 423 is fixed to the 2 nd end portions of the two inner cables 422 of the manual brake release apparatus 400. The connecting member 423 is connected to an end of the rod-shaped balance bar 438. Holes for connecting the connecting members 423 are provided at both ends of the balance bar 438. The connecting members 423 can be coupled to each other by holding the end of the balance bar 438 by the U-shaped portion and inserting the pin 437 therethrough. The connecting member 423 abuts against an abutting portion 450 provided on the connecting side bracket 443.

The balance bar 438 passes through the lever member 434 to be coupled to the lever member 434. The lever member 434 is provided with a through hole 434D through which the balance bar 438 passes.

As shown in fig. 8, when the operating portion 410 of one cable portion 420 (in the example shown in fig. 8, the right side) of the manual brake release device 400 is pulled, the connecting member 423 connected to the cable portion 420 is separated upward in the drawing from the abutting portion 450.

On the other hand, since the position of the other cable part 420 (left side in the example shown in fig. 8) of the manual brake release device 400 is not changed, the connection member 423 connected to the cable part 420 maintains the state of being in contact with the abutting part 450. As a result, the balance bar 438 connected between the two connecting members 423 swings around the pin 437 of the connecting member 423 in contact with the abutting portion 450 as the rotation center.

At this time, since the connection member 423 is inclined obliquely with respect to the horizontal direction, the edge of the through hole 434D of the lever member 434 engages with the side surface of the connection member 423 from both the top and bottom. As a result, the through hole 434D of the lever member 434, which is a force point portion, moves in accordance with the swing of the connecting member 423. The lever member 434 rotates the 2 nd extending portion 434C as the operating point portion in a direction away from the cylinder main body 210 about the shaft portion 434A as the fulcrum portion. Then, the rotational force of the lever member 434 is transmitted from the 2 nd extension 434C to the locking member 281 via the ring member 284. As a result, the 1 st end portion of the lock member 281 coupled to the ring member 284 is pulled out toward the outside of the cylinder main body 210, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 2, in addition to effects (1), (2), and (4) of embodiment 1, the following effects can be obtained.

(5) When the cable part 420 is operated, the balance bar 438 can rotate at the shaft part 434A serving as a fulcrum part and drive the 2 nd extending part 434C serving as an action point.

(6) When the operating portion 410 of the one cable portion 420 of the brake manual release device 400 is pulled, the balance bar 438 swings around the pin 437 of the connecting member 423 of the other cable portion 420 of the brake manual release device 400 as a rotation center. The balance bar 438 engages with the edge of the through hole 434D of the lever member 434, thereby rotating the lever member 434. That is, since the moving distance of the through hole 434D of the lever member 434 is substantially half of the moving distance of the connecting member 423, the operating force of the brake manual release apparatus 400 can be reduced to half.

(embodiment 3)

Next, embodiment 3 of the braking device will be described with reference to fig. 9 to 12. The structure of the connecting portion of the manual brake release device according to embodiment 3 is different from that according to embodiment 1. Therefore, in the following description, the configuration different from embodiment 1 will be mainly described, and the same configuration as embodiment 1 will not be described redundantly.

As shown in fig. 9, the two cable portions 420 of the manual brake release device 400 extend so as to face each other in the horizontal direction, and a transmission member 460 having a substantially L-shape is rotatably coupled to a connecting member 423 of the inner cable 422 fixed to each cable portion 420 by a pin 437. A rotation shaft 461 supported by the cylinder main body 210 is provided at an L-shaped corner of each transmission member 460. The 1 st end 462 of the L of the transmission member 460 is coupled to the connection member 423. The 2 nd end 463, which is the end of the transmission member 460 opposite to the 1 st end 462 to which the connection member 423 is connected, abuts against the abutting portion 470 formed in the cylinder main body 210.

As shown in fig. 10, the 2 nd end 463 of each transmission member 460 engages with the 1 st extending portion 434B of the lever member 434. The transmission members 460 are arranged in parallel in the extending direction of the 1 st extending portion 434B of the lever member 434, and engage with the 1 st extending portion 434B at different positions from each other.

As shown in fig. 11 a, when the operation portion 410 on one side of the manual brake release device 400 is pulled (on the right side in fig. 11 a), the connection member 423 of the cable portion 420 is also moved in the horizontal direction. Then, the end of the transmission member 460 coupled to the connection member 423 moves in the horizontal direction, and the transmission member 460 rotates clockwise about the rotation shaft 461. In addition, if the cable part 420 on the left side is used, the transmission member 460 rotates counterclockwise.

As a result, as shown in fig. 11 (b), the transmission member 460 rotates the 2 nd end 463 upward about the rotation shaft 461 as a fulcrum. The transmission member 460 lifts the 1 st extension 434B of the lever member 434 from below.

At this time, as shown in fig. 12 (a), the lever member 434 is disposed with the 1 st extending portion 434B along the horizontal direction in a state where the operation portion 410 is not pulled. The moving direction of the connecting member 423 of the cable part 420 and the moving direction of the locking member 281 are in a twisted positional relationship, and even if the arrangement between the locking member 281 and the 2 nd end of the cable part 420 is in a twisted position, the brake manual release device 400 can be provided.

On the other hand, as shown in fig. 12 (B), when the transmission member 460 rotates the 2 nd end 463 upward about the rotation shaft 461 as a fulcrum, the lever member 434 raises the 1 st extension part 434B to be inclined with respect to the horizontal direction about the rotation shaft 441 as a fulcrum. The lever member 434 rotates the 2 nd extending portion 434C as the operating point portion in a direction away from the cylinder main body 210 about the rotation shaft 441 as the fulcrum portion. Then, the rotational force of the lever member 434 is transmitted from the 2 nd extension 434C to the locking member 281 via the ring member 284. As a result, the 1 st end portion of the lock member 281 coupled to the ring member 284 is pulled out toward the outside of the cylinder main body 210, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 3, in addition to effects (1), (2), and (4) of embodiment 1, the following effects can be obtained.

(7) Since the displacement of the transmission member 460 provided in each cable part 420 is transmitted to the lever member 434 connected to the lock member 281, the degree of freedom of the installation position of the plurality of cable parts 420 can be increased by changing the arrangement direction of the transmission member 460 with respect to the lever member 434.

(embodiment 4)

Next, embodiment 4 of the braking device will be described with reference to fig. 13 and 14. Further, the arrangement of the cable part 420 of the manual brake release device of embodiment 4 is different from that of embodiment 3. Therefore, in the following description, the configuration different from embodiment 3 will be mainly described, and the same configuration as embodiment 3 will not be described redundantly.

As shown in fig. 13, the two cable portions 420 of the manual brake release device 400 extend obliquely downward, and a transmission member 460 having an L-shaped spread shape is provided on a connection member 423 fixed to each cable portion 420 so as to be rotatable about a rotation shaft 461. The corner portions of the transmission members 460 are provided so as to be rotatable about the rotary shaft 461 pivotally supported by the cylinder body 210. The 1 st end 462 of the transmission member 460 is coupled to the connection member 423. The 2 nd end 463, which is the end of the transmission member 460 opposite to the 1 st end 462 to which the connection member 423 is connected, abuts against the abutting portion 470 provided in the cylinder main body 210. The movement direction of the connecting member 423 of the cable part 420 and the movement direction of the locking member 281 are in a twisted positional relationship, and the connecting member 423 of the cable part 420 moves in an obliquely upward direction and an obliquely downward direction. Therefore, even if the arrangement between the locking member 281 and the cable part 420 is a twisted position and the connecting member 423 moves in an obliquely upward direction or an obliquely downward direction, the manual brake release device 400 can be provided.

Further, the 2 nd end 463 of each transmission member 460 engages with the 1 st extending portion 434B of the lever member 434. The transmission members 460 are arranged in parallel in the extending direction of the 1 st extending portion 434B of the lever member 434, and engage with the 1 st extending portion 434B at different positions from each other.

As shown in fig. 14 a, when the operation portion 410 on the side where the manual brake release device 400 is pulled (the right side in fig. 14 a), the connection member 423 of the cable portion 420 is also moved obliquely downward. Then, the end portion connected to the connection member 423 moves obliquely downward in the figure, and the transmission member 460 rotates clockwise about the rotation shaft 461. In addition, if the cable part 420 on the left side is used, the transmission member 460 rotates counterclockwise.

As a result, as shown in fig. 14 (b), the 2 nd end 463 of the transmission member 460 rotates the 2 nd end 463 upward in the drawing about the rotation shaft 461 as a fulcrum. The transmission member 460 lifts the 1 st extension 434B of the lever member 434 from below in the figure.

The lever member 434 rotates the 2 nd extending portion 434C serving as an operating point in a direction away from the cylinder main body 210 around a shaft portion 434A serving as a fulcrum that is looped around the rotation shaft 441. Then, the rotational force of the lever member 434 is transmitted to the locking member 281 coupled to the ring member 284. As a result, the 1 st end portion of the lock member 281 coupled to the ring member 284 is pulled out toward the outside of the cylinder main body 210, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 4, in addition to effects (1), (2), and (4) of embodiment 1, the following effects can be obtained.

(8) Since the displacement of the transmission member 460 provided in each cable part 420 is transmitted to the lever member 434 connected to the lock member 281, the degree of freedom of the installation position of the plurality of cable parts 420 can be increased by changing the arrangement direction of the transmission member 460 with respect to the lever member 434.

(embodiment 5)

Next, embodiment 5 of the braking device will be described with reference to fig. 15 and 16. Further, the connection structure between the cable portion and the connection portion of the manual brake release device of embodiment 5 is different from that of embodiment 1. Therefore, in the following description, the configuration different from embodiment 1 will be mainly described, and the same configuration as embodiment 1 will not be described redundantly.

As shown in fig. 15, a relay mechanism 600 is provided at the 2 nd end of the two cable portions 420 of the manual release device 400. Two cable portions 420 are connected to one end of the relay mechanism 600, and 1 connection cable 650 is connected to the other end of the relay mechanism 600. The connection cable 650 has the same configuration as the 2 nd end of the cable part 420 according to embodiments 1 to 4, and an end opposite to the end connected to the lever member 434 is inserted into the housing 610 of the relay mechanism 600. That is, the relay mechanism 600 relays the two cable portions 420 and the 1 connection cable 650. Between the relay mechanism 600 and the lock member 281, a 2 nd attaching portion 542, a connecting side bracket 543, nuts 544 and 545, and only 1 set of 2 nd expansion/contraction portions 546 are provided. The connecting side bracket 543 is fixed to the cylinder main body 210. Further, the relay mechanism 600 to the lever member 434 function as a connecting portion.

The housing 610 of the relay mechanism 600 is fixed to the 2 nd mounting portion 542. A moving member 620 is housed in a case 610 of the relay mechanism 600. The 2 nd end portion of the inner cable 422 of the cable portion 420 penetrates the moving member 620 in the vertical direction in the drawing. A caulking member 630 is fixed to a distal end portion of a 2 nd end portion of the inner cable 422 of the cable part 420, which protrudes from the lower end of the moving member 620. By the caulking member 630 being brought into contact with it, the moving member 620 moves in the vertical direction in the figure integrally with the inner cable 422. In addition, a connection cable 650 is inserted through the center of the moving member 620. A caulking member 660 is fixed to a 1 st end of the connection cable 650 at a portion protruding from the upper end of the moving member 620. The impaction member 660 is secured to the moving member 620. Thus, the connection cable 650 and the moving member 620 move in the up-down direction in the drawing as one body.

As shown in fig. 16 (a), a U-shaped connecting member 523 is fixed to the 2 nd end of the connecting cable 650. The connecting member 523 is connected with the lever member 434. The biasing spring 547 is attached to the 2 nd attaching portion 542 and the connecting member 523 in a state where the biasing spring 547 is looped around the connecting cable 650. The urging spring 547 is covered with the 2 nd expansion/contraction portion 546 having a corrugated shape. The biasing spring 547 biases the 2 nd attaching portion 542 in a direction away from the connecting member 523 to extend the 2 nd expansion/contraction portion 546. When the operating portion 410 is pulled and the moving member 620 moves, the 2 nd expansion and contraction portion 546 is shortened because the amount of projection of the connection cable 650 toward the 2 nd end portion is shortened. On the other hand, if the operation portion 410 is not pulled, the 2 nd expansion and contraction portion 546 is expanded because the amount of protrusion of the connection cable 650 on the 2 nd end portion side is increased.

As shown in fig. 16 b, when the operating portion 410 on one side of the manual brake release device 400 is pulled (left side in fig. 16 b), the moving member 620 moves upward in the drawing as the 2 nd end of the cable portion 420 moves upward in the drawing. At this time, the 2 nd end of the other cable part 420 does not move, and the moving member 620 moves in a state where the inner cable 422 of the other cable part 420 is inserted. As a result, the connection cable 650 moves upward in the figure against the urging force of the urging spring 547 in accordance with the movement of the moving member 620, and the connection member 523 fixed to the 2 nd end of the connection cable 650 moves upward in the figure.

Thereafter, as shown in fig. 15, the lever member 434 is pulled upward in the figure as the connecting member 523 moves upward in the figure. The lever member 434 is rotated around a shaft portion 434A serving as a fulcrum, which is attached around the rotation shaft 441, so that a 2 nd extending portion 434C serving as an operating point is separated from the cylinder main body 210. And, the rotational force of the lever member 434 is transmitted to the locking member 281 via the ring member 284. As a result, the 1 st end portion of the lock member 281 coupled to the ring member 284 is pulled out toward the outside of the cylinder main body 210, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 5, in addition to effects (1), (2), and (4) of embodiment 1, the following effects can be obtained.

(9) Each cable part 420 is connected to 1 connection cable 650 by the relay mechanism 600. Therefore, when the cable part 420 is mounted on the railway vehicle 10, the cable part 420 can be connected to the relay mechanism 600 and mounted while maintaining the structures of the connection cable 650 and the lever member 434.

(embodiment 6)

Next, embodiment 6 of the braking device will be described with reference to fig. 17 and 18. The structure of the relay mechanism of the manual brake release device according to embodiment 6 is different from that according to embodiment 5. Therefore, in the following description, the configuration different from embodiment 5 will be mainly described, and the same configuration as embodiment 5 will not be described redundantly.

As shown in fig. 17, a relay mechanism 700 is provided at the 2 nd end of the two cable portions 420 of the manual release device 400. Two cable portions 420 are connected to one end of the relay mechanism 700, and 1 connection cable 770 is connected to the other end of the relay mechanism 700. The connection cable 770 has the same configuration as the 2 nd end of the cable part 420 according to embodiments 1 to 4, and the end opposite to the end connected to the lever member 434 is inserted into the housing 710 of the relay mechanism 700. That is, the relay mechanism 700 relays two cable portions 420 and 1 connection cable 770. Between the relay mechanism 700 and the lock member 281, a 2 nd attachment portion 542, a connecting side bracket 543, nuts 544 and 545, and only 1 set of 2 nd expansion/contraction portions 546 are provided. The connecting side bracket 543 is fixed to the cylinder main body 210. Further, the relay mechanism 700 to the lever member 434 function as a connecting portion.

The housing 710 of the relay mechanism 700 is fixed to the 2 nd mounting portion 542. The housing 710 of the relay mechanism 700 accommodates a coupling plate 750. The 2 nd end of the inner cable 422 of the cable part 420 is connected to the connecting plate 750 from the upper side in the figure. Rollers 730 are provided at both ends of the link plate 750. Each roller 730 is rotatably coupled to the coupling plate 750 by a coupling pin 740. A cable pin 720 is fixed to the tip of the 2 nd end of the cable part 420. Each roller 730 is coupled to its corresponding cable pin 720. Thus, both end portions of the link plate 750 move in the vertical direction in the drawing integrally with the cable portion 420. A connection cable 770 is inserted through the center of the connection plate 750. A caulking member 760 is fixed to a portion of the 1 st end of the connection cable 770 protruding from the upper end of the connection plate 750. The caulking member 760 is fixed to the coupling plate 750. Thus, the connection cable 770 and the link plate 750 move in the vertical direction in the drawing as a unit.

As shown in fig. 18 (a), a U-shaped connecting member 523 is fixed to the 2 nd end of the connecting cable 770. The connecting member 523 is connected with the lever member 434. The urging spring 547 is attached between the 2 nd attaching portion 542 and the connecting member 523 in a state where the urging spring 547 is looped around the connecting cable 770. The urging spring 547 is covered with the 2 nd expansion/contraction portion 546 having a corrugated shape. The biasing spring 547 biases the 2 nd attaching portion 542 in a direction away from the connecting member 523 to extend the 2 nd expansion/contraction portion 546. When the operation portion 410 is pulled and the coupling plate 750 moves, the 2 nd expansion and contraction portion 546 is shortened because the amount of projection of the connection cable 770 on the 2 nd end portion side is shortened. On the other hand, if the operation portion 410 is not pulled, the 2 nd expansion/contraction portion 546 is extended because the amount of protrusion of the connection cable 770 on the 2 nd end portion side is increased.

As shown in fig. 18 b, when the operating portion 410 on one side of the manual brake release device 400 is pulled (left side in fig. 18 b), the roller 730 connected to the cable portion 420 is separated upward in the drawing from the bottom surface of the housing 710. At this time, since the position of the other cable part 420 (the right side in fig. 18 (b)) of the manual brake release device 400 is not changed, the roller 730 connected to the cable part 420 is maintained in a state of being in contact with the bottom surface of the housing 710. As a result, the link plate 750 connected between the two rollers 730 swings around the roller 730 in contact with the bottom surface of the housing 710 as a rotation center.

Then, as the coupling portion between the coupling plate 750 and the connection cable 770 moves upward in the figure, the connection cable 770 moves upward in the figure against the urging force of the urging spring 547, and the connection member 523 fixed to the 2 nd end portion of the connection cable 770 moves upward in the figure.

Thereafter, as shown in fig. 17, the lever member 434 is pulled upward in the figure as the connecting member 523 moves upward in the figure. The lever member 434 is rotated around a shaft portion 434A serving as a fulcrum, which is attached around the rotation shaft 441, so that a 2 nd extending portion 434C serving as an operating point is separated from the cylinder main body 210. And, the rotational force of the lever member 434 is transmitted to the locking member 281 via the ring member 284. As a result, the 1 st end portion of the lock member 281 coupled to the ring member 284 is pulled out toward the outside of the cylinder main body 210, and the braking force of the spring brake mechanism 240 is released.

As described above, according to embodiment 6, in addition to effects (1), (2), and (4) of embodiment 1 and effect (9) of embodiment 5, the following effects can be obtained.

(10) When the operating portion 410 of the cable portion 420 on one side of the manual brake release device 400 is pulled, the link plate 750 swings around the roller 730 connected to the cable portion 420 on the other side of the manual brake release device 400 as a rotation center. Then, the connection cable 770 inserted through the center portion of the connection plate 750 moves upward in the figure. That is, the moving distance of the connecting cable 770 with respect to the inner cable 422 is substantially half, and therefore, the operating force of the brake manual release apparatus 400 can be reduced to half.

(other embodiments)

The above embodiments may be implemented in the following manner.

In each of the above embodiments, the lock member 281 and the lever member 434 are coupled to each other by the ring member 284, but the lock member 281 and the lever member 434 may be directly coupled to each other.

In the above-described embodiments 5 and 6, the housings 610 and 710 of the relay mechanisms 600 and 700 are fixed to the 2 nd attaching part 442. However, the housings 610, 710 of the relay mechanisms 600, 700 may be fixed to the connecting side bracket 443. Further, the housings 610 and 710 of the relay mechanisms 600 and 700 may be directly fixed to the cylinder main body 210.

In each of the above embodiments, manual brake release device 400 is provided on the wheel 12 side of brake cylinder device 200. However, manual brake release device 400 may be provided at a position on the opposite side of wheel 12 as viewed from brake cylinder device 200. Further, manual brake release device 400 may be provided at any position of brake cylinder device 200.

In each of the above embodiments, compressed air is used as the pressure fluid used in the fluid brake mechanism 230 and the spring brake mechanism 240, but pressure oil, for example, may be used as the pressure fluid.

In the above embodiments, the present invention is applied to a brake device that generates a braking force by coming into contact with the tread surface 12a of the wheel 12, but the present invention may also be applied to a brake device such as a caliper brake or a rail brake that presses a braking friction member against a pressed member.

In each of the above embodiments, the operation unit 410 of the manual brake release device 400 is manually operated. However, an operation device for operating the operation unit 410 may be connected to the operation unit 410 of the manual brake release device 400, and the operation unit may operate the operation unit 410 of the manual brake release device 400. The brake manual release device 400 can be operated remotely as long as the operation device has a wired or wireless communication function.

In each of the above embodiments, the manual brake release device 400 includes the plurality of cable portions 420, but is not limited to the cable portions 420 and may be another member such as a rod as long as it can operate the locking member 281 of the lock mechanism 280.

Claims (7)

1. A brake device, wherein,

the braking device is provided with:

a spring brake mechanism that generates a braking force by pressing a brake friction member against a pressed member with a spring force; and

a releasing unit that releases the braking force by preventing transmission of a spring force to the friction member for braking,

the spring brake mechanism is provided with a plurality of the release portions.

2. The braking device according to claim 1,

the plurality of releasing portions includes at least two cable portions.

3. The braking device according to claim 2,

the releasing portion includes a lever portion provided between the cable portion and the spring brake mechanism,

the lever portion includes: a fulcrum portion that supports the lever portion so as to be rotatable about a rotation axis; a force point portion connected with the cable portion; and an action point portion connected to the spring brake mechanism.

4. The braking device according to claim 3,

the lever part is a rod-shaped member having an action point, and both ends of the rod-shaped member are connected to the two cable parts, respectively.

5. The braking device according to claim 3,

the distance from the fulcrum portion to the force point portion is longer than the distance from the fulcrum portion to the action point portion.

6. A railway vehicle, wherein,

the railway vehicle is provided with the braking device according to any one of claims 1 to 5,

the release portion is disposed on both sides of the railway vehicle.

7. A railway vehicle, wherein,

the railway vehicle is provided with the braking device according to any one of claims 2 to 5,

the cable portion is disposed so as to pass over a bogie of the railway vehicle.

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