JP2003194111A - Spring brake device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spring brake device for parking (emergency) especially used for a railroad vehicle, an industrial machine, and an automobile. <P>SOLUTION: The spring brake device is provided with a mounting bracket 2, caliper body 4, inner caliper arm 6a and outer caliper arm 6b, cylinders 7, 7 for a caliper brake, and inner brake lining 8a and outer brake lining 8b. A parking brake 9 is integrally built into the caliper body 4. Common use parts such as the inner brake lining 8a and outer brake lining 8b can be used for an ordinary floating type of caliper brake and parking brake 9. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is particularly applicable to railway vehicles,
The present invention relates to a spring brake device for parking (emergency) used in industrial machines and automobiles.

[0002]

2. Description of the Related Art In recent years, it has been recognized that parking (emergency) brakes are necessary for the purpose of stopping wheels and locking normal brakes during parking of railway vehicles. Conventionally,
A support frame fixed to a bogie of a railway vehicle, a caliper brake main body slidably supported by two support pins in the axial direction of the support pin with respect to the support frame, and a caliper brake main body provided on the caliper brake main body. Two arms for sandwiching the wheel, a cylinder provided for the first arm, and a brake shoe held by the two arms are provided, and the support pin is supported with respect to the support frame via a spherical bearing. A caliper brake device for a railway vehicle, in which a spherical bearing is arranged on a perpendicular line passing through a center of gravity of a caliper brake main body
No. 226467.

It also includes a piston that operates within the cylinder and is guided by the inner surface of the cylinder, and an elastic device that displaces the piston forward and away from one end wall of the cylinder toward a brake operating position. , The piston is normally held in the brake release position by exerting a fluid pressure against the elastic displacement force of the elastic device, and is further rotatably mounted on the end wall to extend forward and be internally threaded. An elongate hollow member having a portion and an inner threaded portion of the elongate hollow member for movement to extend and retract within the elongate hollow member and engage the piston to provide a forward motion of the piston. A threaded abutment member having a restricting abutment, the piston impacting by relatively rotating the threaded abutment member and the hollow member. Brake actuator for a vehicle is disclosed in JP-B-54-19551, which is adapted to be retracted against the elastic biasing force from the brake applied position for the part.

[0004]

However, Japanese Unexamined Patent Publication No. 8-
The caliper brake device for a railway vehicle disclosed in Japanese Patent No. 226467 is a mere normal floating type caliper brake, and the caliper brake main body does not include a parking brake.

In the brake actuator disclosed in Japanese Patent Publication No. 54-19551, the piston is slidably guided on the outer surface of the hollow member, and the piston is axially moved by the inner surface of the cylinder and the outer surface of the hollow member. Of the radially-engaged engagements of the threaded abutment member extending axially outwardly of the rear end of the hollow member as it enters the hollow member for retracting the piston. Since the hollow member has a length that does not exist, the total length of the hollow member becomes long, and the hollow member is rotatably mounted on the end wall, so the work of attaching the hollow member to the end wall requires labor. It was troublesome.

An object of the present invention is to solve the above-mentioned problems and to integrally incorporate a parking brake into a caliper body of a normal floating type caliper brake, thereby providing a first caliper brake and a parking brake.
It is an object of the present invention to provide a spring brake device that can use common parts such as the brake shoe and the second brake shoe.

[0007]

A spring brake device according to the present invention includes a support, a caliper body slidably supported by the support via two slide pins, and a caliper body straddling a wheel. The formed first and second caliper arms, the caliper brake cylinder mounted on the first caliper arm, and the first and second brake shoe held by the first and second caliper arms. It is a floating type caliper brake equipped with a lever type parking mechanism on the caliper body, and the parking mechanism is arranged on the other side against the spring actuator fixed to the caliper body and the spring provided on one side of the spring actuator. Hydraulic piston, a hydraulic cylinder having the hydraulic piston inside, and a first part formed on the caliper body. Of the parking brake, which is movably mounted on the caliper arm, and the spring actuator pushes with a spring when releasing the fluid pressure in the hydraulic chamber formed between the hydraulic piston and the hydraulic cylinder. And a moving force transmitting mechanism for transmitting the moving force of the rod to the parking brake piston.

In the spring brake device of the present invention, the spring actuator is arranged with respect to the caliper body so as to sandwich the slide pin.

In the spring brake device of the present invention, the spring actuator has an actuator body, a piston movably arranged inside the actuator body along the central axis direction, and the piston is fixed to the piston along the central axis line. A push rod penetrating the end wall at one end of the actuator body, an adjuster nut screwed on the opposite side of the push rod of the piston, and an end cover arranged at the other end of the actuator body opening,
A biasing means for biasing the piston toward the end wall of the actuator body, and a piston supported by the end cover so as to be movable along the push rod and the central axis are retracted against the biasing force of the biasing means. Manual release bolt, holding spring that urges the head with a non-circular cross section at one end of the manual release bolt that is fitted in the fitting recess of the adjuster nut toward the piston, and end cover of the manual release bolt And a manual release nut screwed to the other end protruding from.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a cutaway side view of essential parts showing a spring brake device according to a first embodiment of the present invention, FIG. 2 is a plan view of a spring brake device according to the first embodiment of the present invention, and FIG. FIG. 4 is an enlarged sectional view of the spring actuator, FIG. 5 is an enlarged sectional view of the spring actuator, and FIG. 6 is a fragmentary plan view of the spring actuator. FIG. 7 is an enlarged cross-sectional view of the push rod when the manual release of the moving force of the push rod is manually released, FIG. 7 is a schematic side view showing the spring brake device according to the first embodiment of the present invention, and FIG. It is a top view. As shown in FIGS. 1 and 2, the spring brake device 1 according to the present invention is slidably supported by a mounting bracket 2 which is a support and two mounting pins 3 on the mounting bracket 2. The caliper body 4, the inner caliper arm 6a and the outer caliper arm 6b, which are the first caliper arm and the second caliper arm formed over the wheels 5 of the railcar on the caliper body 4, and the inner caliper arm 6a The two caliper brake cylinders 7 and 7 and the inner brake lining 8a and the outer brake lining 8 that are the first brake shoe and the second brake shoe held by the inner caliper arm 6a and the outer caliper arm 6b.
It consists of a normal floating type caliper brake with b, and the caliper body 4 incorporates a parking brake 9 as a lever type parking mechanism.

As shown in FIGS. 1 and 2, the spring brake device 1 of the present invention has a spring actuator 1 in which a parking brake 9 is fixed to a caliper body 4.
0, the parking brake piston 11 movably provided on the inner caliper arm 6a formed on the caliper body 4, and the moving force of the push rod 12 of the spring actuator 10 mounted on the caliper body 4 to the parking brake piston. And a moving force transmission mechanism 13 that transmits the movement force to the moving body 11.

The spring brake device 1 of the present invention, as shown in FIGS.
0 is arranged with respect to the caliper body 4 so as to sandwich the two slide pins 3 and 3.

The spring brake device 1 of the present invention, as shown in FIGS.
Reference numeral 0 denotes an actuator body 14, a piston 15 movably arranged inside the actuator body 14 along the central axis direction, and an end of one end of the actuator body 14 fixedly mounted on the piston 15 along the central axis line. Wall 1
6, a push rod 12 penetrating through 6, an adjuster nut 17 screwed to the opposite side of the push rod 12 of the piston 15, an end cover 18 arranged at the other open end of the actuator body 14, and a piston 15 A biasing means 19 for biasing the end wall 16 of the body 14 and a piston 15 movably supported by the end cover 18 along the push rod 12 and the central axis line resist the biasing force of the biasing means 19. And a manual release bolt 20 that is retracted, and a holding portion that biases the head 22 having a non-circular cross-section at one end of the manual release bolt 20 fitted in the fitting recess 21 of the adjuster nut 17 toward the piston 15. A compression coil spring 23, which is a spring, and a manual release nut screwed to the other end of the manual release bolt 20 protruding from the end cover 18. And a door 24.

As shown in FIGS. 1 and 2, an inner caliper arm 6a and an outer caliper arm 6b are formed on the caliper body 4 of the spring brake device 1 so as to straddle the wheels 5 of the railway vehicle. The caliper arm 6a is equipped with two caliper brake cylinders 7, 7 which are vertically spaced from each other, and one parking brake is provided between the caliper brake cylinders 7, 7 of the inner caliper arm 6a of the caliper body 4. A piston 11 for movement is provided movably.

On the upper part of the inner caliper arm 6a formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 1, an upper anchor block 25 is provided, and an anchor pin 26 that holds an upper end portion of an inner brake lining 8a arranged inside the inner caliper arm 6a of the caliper body 4 is provided in the upper anchor block 25.
2 is slidably supported in the wheel rotation axis direction, and the upper anchor block 25 is fixed to the upper edge of the inner caliper arm 6a of the caliper body 4 by two anchor bolts 27, 27 as shown in FIG. ing.

Below the inner caliper arm 6a formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 1, a lower anchor block 28 is provided, and an anchor pin 29 that holds a lower end portion of an inner brake lining 8a arranged inside the inner caliper arm 6a of the caliper body 4 rotates the lower anchor block 28. The lower anchor block 28 is slidably supported in the axial direction, and the lower anchor block 28 is the inner caliper arm 6 of the caliper body 4.
It is fixed to the lower edge of a by two anchor bolts 30, 30.

Inside the inner caliper arm 6a formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 1 and FIG. 2, the inner brake lining 8a is arranged, and the upper and lower ends of the inner brake lining 8a are held by the anchor pins 26 and the anchor pins 29 with respect to the inner caliper arm 6a of the caliper body 4, An inner end of a parking brake piston 11 is attached to the brake lining 8a.

On the upper part of the outer caliper arm 6b formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 2, an upper anchor block 31 that holds the upper end portion of the outer brake lining 8b is arranged,
The upper anchor block 31 is fixed to the upper edge of the outer caliper arm 6b of the caliper body 4 by two anchor bolts 32, 32.

A lower anchor block (not shown) for holding the lower end portion of the outer brake lining 8b is disposed below the outer caliper arm 6b formed in the caliper body 4 of the spring brake device 1. The lower anchor block is a caliper block. It is fixed to the lower edge of the outer caliper arm 6b of the body 4 by two anchor bolts (not shown).

Inside the outer caliper arm 6b formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 2, the outer brake lining 8b is arranged, and the upper and lower ends of the outer brake lining 8b are directly attached to the upper anchor block 31 and the lower anchor block.

As shown in FIG. 2, an inner rotor 33a is attached to the inside of the wheel 5 of the railway vehicle, and an outer rotor 33b is attached to the outside of the wheel 5 of the railway vehicle.

As shown in FIGS. 1 and 2, the caliper body 4 of the spring brake device 1 faces the outer side of the mounting arm 57 of the actuator body 14 of the spring actuator 10 and the outer side of the mount portion 62, and the actuator mounting portion 34. The actuator mounting portion 35 is formed, and the one actuator mounting portion 34 formed on the caliper body 4 has a screw hole 36 as shown in FIG.
And a screw hole 37, and a through hole 38 is provided in the other actuator mounting portion 35 formed in the caliper body 4.

As shown in FIG. 1, the caliper body 4 of the spring brake device 1 moves in the wheel rotation axis direction via two parallel mounting slide pins 3 on the mounting bracket 2 which are vertically spaced from each other. The mounting bracket 2 is supported freely, and is fixed to the bogie frame 40 of the railway vehicle by bolts 41 and nuts 42.

The spring actuator 10 is, as shown in FIGS. 3 and 4, a cylindrical actuator body 1.
4, a piston 15 movably arranged inside the actuator body 14 along the central axis direction, and a push penetrating an end wall 16 at one end of the actuator body 14 fixed to the piston 15 along the central axis line. Rod 12
And an end cover 18 arranged at the other open end of the actuator body 14, a piston 15 and an end cover 1.
8 and two compression coil springs 45 and 46 serving as a biasing means 19 for constantly biasing the piston 15 toward the end wall 16 of the actuator body 14,
The piston 15 is provided on the outer circumference of the end wall 16 of the actuator body 14 on the same circumference.
There are three fluid pressure cylinders 48 that move against the urging force of.

As shown in FIG. 3, the actuator body 14 of the spring actuator 10 has a cylindrical peripheral wall 50, and one end of the peripheral wall 50 of the actuator body 14 has an end wall 16 as shown in FIG. A rod insertion hole 51 for inserting the push rod 12 is provided in the center of the end wall 16 of the actuator body 14, and three through holes 52 are provided at appropriate places near the outer peripheral edge of the end wall 16 of the actuator body 14. A cylindrical boss 53 projecting toward the end cover 18 is integrally formed around the rod insertion hole 51 on the inner surface of the end wall 16 of the actuator body 14.

On the outer surface of the end wall 16 of the actuator body 14 of the spring actuator 10, as shown in FIG. 3, an actuator head 54 is formed around the rod insertion hole 51 so as to project in a direction opposite to the boss 53. As shown in FIG. 4, an annular groove 55 is formed on the outer peripheral surface of the tip of the actuator head 54 of the actuator body 14.

As shown in FIGS. 3 and 4, the actuator head 54 of the actuator body 14 of the spring actuator 10 is provided with an auto adjuster mechanism 56 for keeping the moving amount of the push rod 12 constant.

As shown in FIG. 3, on one side of the actuator head 54 of the actuator body 14 of the spring actuator 10, a mounting arm 57 which projects laterally is integrally formed, and the mounting arm 57 of the actuator body 14 is formed. At appropriate points on the upper and lower edges,
A plurality of through holes 58, 58 communicating with the screw holes 36 and the screw holes 37 of the actuator mounting portion 34 of the caliper body 4 of the spring brake device 1 are provided.

As shown in FIGS. 1 and 2, between the upper and lower edges of the mounting arm 57 of the actuator body 14 of the spring actuator 10, the through holes 58, 58 project outward. The pair of supporting protrusions 59, 59 that are parallel to each other are integrally formed, and the actuator body 1
As shown in FIGS. 3 and 4, the support protrusions 59, 59 of the mounting arm 57 of No. 4 are provided with support holes 60, 60 for supporting the pivot pin 61 on the same vertical central axis line. .

A part of the peripheral wall 50 of the actuator body 14 of the spring actuator 10 is shown in FIGS.
As shown in FIG. 7, a mount portion 62 for mounting to the caliper body 4 of the spring brake device 1 that brakes the wheels 5 of the railway vehicle that bulges laterally in the same direction as the mounting arm 57 is integrally formed. As shown in FIGS. 3 and 4, the mount portion 62 of the actuator body 14 is provided with a screw hole 63 that communicates with the through hole 38 of the actuator mounting portion 35 of the caliper body 4 of the spring brake device 1.

At the other end of the peripheral wall 50 of the actuator body 14 of the spring actuator 10, an opening 64 is formed as shown in FIG.
A plurality of screw holes 65 are provided on the other end surface of the peripheral wall 50.

Through holes 58, 58 of the mounting arm 57 of the actuator body 14 of the spring actuator 10.
3, bolts 66, 66 are inserted, and the bolt 66 and the tip of the bolt 66 are inserted into the screw hole 36 and the screw hole 37 of the actuator mounting portion 34 of the caliper body 4 of the spring brake device 1. Screwed, Figure 1
As shown in, the mounting arm 57 of the actuator body 14 of the spring actuator 10 is fixed to the inside of the actuator mounting portion 34 of the caliper body 4 of the spring brake device 1 by four bolts 66.

As shown in FIG. 3, a bolt 67 is inserted into the through hole 38 of the actuator mounting portion 35 of the caliper body 4 of the spring brake device 1, and a screw hole of the mount portion 62 of the actuator body 14 of the spring actuator 10 is inserted. A tip portion of a bolt 67 is screwed onto 63, and the mount portion 62 of the actuator body 14 is fixed to the inside of the actuator mounting portion 35 of the caliper body 4 by the bolt 67.

Inside the peripheral wall 50 of the actuator body 14 of the spring actuator 10, as shown in FIG. 4, a piston 15 is movably arranged along the central axis direction, and the piston 15 is a cylindrical piston body 70. And a flange 71 extending in the circumferential direction is integrally formed at one end of the piston body 70 of the piston 15.

At the other end of the piston body 70 of the piston 15, as shown in FIG. 4, a cylindrical wall 72 having a small diameter is formed along the central axis, and the outer peripheral surface of the cylindrical wall 72 of the piston 15 is provided. The threaded portion 73 is formed, and the cylindrical wall 7 of the piston 15 is formed.
An end wall 74 is formed at the end of No. 2, and a fitting hole 75 is provided at the center of the end wall 74 of the piston 15.

As shown in FIG. 3, a push rod 12 projecting toward the end wall 16 of the actuator body 14 of the spring actuator 10 is fixed to the piston 15 on the central axis line. As shown in FIG. 4, a screw hole 76 is provided along the central axis in the interior between the push rod 12 and the end, and a small diameter portion 77 is formed at the other end of the push rod 12. Inside the portion 77, a screw hole 78 is provided along the central axis.

In the fitting hole 75 of the end wall 74 of the piston 15, as shown in FIG.
7 is inserted, and a set screw 79 is screwed into the screw hole 78 of the small diameter portion 77 of the push rod 12.
2 is fixed to the fitting hole 75 of the end wall 74 of the piston 15 by a set screw 79 via a washer 80.

As shown in FIG. 4, a bolt 82 is screwed into the screw hole 76 of the push rod 12, and an annular groove 84 is formed on the outer peripheral surface of the head 83 of the bolt 82.
A groove 85 is formed on the end surface of the second head 83.

A groove 85 is formed in the head portion 83 of the bolt 82 as shown in FIG.
00a is engaged with the groove 85 of the head portion 83 of the bolt 82, and the bolt 82 is rotatably engaged with the screw hole 76 of the push rod 12.

In the rod insertion hole 51 of the end wall 16 of the actuator body 14 of the spring actuator 10,
As shown in FIGS. 3 and 4, the push rod 12 is inserted, and the push rod 12 is attached to the actuator body 14.
When the push rod 12 is moved with respect to the rod insertion hole 51 of the end wall 16 of the push rod 12 by a predetermined amount, the push rod 12 is rotated by the auto adjuster mechanism 56, and the bolt 82 extends with respect to the push rod 12, The movement amount of 12 is kept constant.

Between the actuator head 54 of the actuator body 14 of the spring actuator 10 and the head portion 83 of the bolt 82, as shown in FIG. 4, a stretchable bellows type composite covering one end of the push rod 12 is formed. The rubber boot 87 is mounted, the locking ring 88 at one end of the boot 87 is fitted in the annular groove 55 of the actuator head 54 of the actuator body 14, and the boot 87 is fitted in the annular groove 84 of the head 83 of the bolt 82. The locking ring 89 at the other end is fitted in, and the portion of the push rod 12 protruding from the rod insertion hole 51 of the actuator body 14 is protected from dust by the boot 87.

The other end of the peripheral wall 50 of the actuator body 14 of the spring actuator 10 is provided at the other end of FIGS.
As shown in FIG. 3, the end cover 18 that closes the opening 64 is provided, and the end cover 18 is a disc-shaped cover body 90.
A manual release bolt 20 for manually releasing the urging force of the urging means 19 for urging the piston 15 toward the end wall 16 of the actuator body 14 at the center of the cover body 90 of the end cover 18. Is provided with a bolt insertion hole 91.

On the outer surface of the cover main body 90 of the end cover 18, as shown in FIG. 4, a cylindrical boss 92 is formed around the bolt insertion hole 91 so as to project outward. An annular groove 93 is formed on the outer peripheral surface of the tip portion of the boss 92.

An annular groove 94 is formed on the outer peripheral surface of the cover body 90 of the end cover 18, as shown in FIG.
A flange 95 extending in the circumferential direction is integrally formed around the cover body 90 of the end cover 18, and the flange 95 of the end cover 18 is formed with the screw hole 65 of the peripheral wall 50 of the actuator body 14 of the spring actuator 10. A plurality of through holes 96 that communicate with each other are provided.

As shown in FIG. 4, the cover body 90 of the end cover 18 is fitted in the opening 64 of the peripheral wall 50 of the actuator body 14 of the spring actuator 10, and the end of the other end surface of the peripheral wall 50 of the actuator body 14 is fitted. The flange 95 formed on the cover 18 is abutted,
The bolt 97 is inserted into the through hole 96 of the flange 95 of the end cover 18, and the peripheral wall 5 of the actuator body 14 is inserted.
The tip of the bolt 97 is screwed into the 0 screw hole 65,
The flange 95 of the end cover 18 is fixed to the screw hole 65 of the peripheral wall 50 of the actuator body 14 by a bolt 97 via a washer 98.

As shown in FIG. 4, an O-ring 99 is fitted in the annular groove 94 of the cover body 90 of the end cover 18, and the inner peripheral surface of the peripheral wall 50 of the actuator body 14 of the spring actuator 10 and the end cover. An O-ring 99 seals between the outer peripheral surface of the cover body 90 of 18.

Inside the peripheral wall 50 of the actuator body 14 of the spring actuator 10, FIG.
As shown in FIG. 6, the piston 15 is constantly urged toward the end wall 16 of the actuator body 14 along the same horizontal central axis between the flange 71 formed on the piston 15 and the cover body 90 of the end cover 18. Two compression coil springs 45, 46 having different coil average diameters serving as the biasing means 19 are arranged. The compression coil spring 45 has a coil average diameter larger than that of the compression coil spring 46. The wire diameter is thicker than the wire diameter of the compression coil spring 46.

As shown in FIGS. 1 and 2, the pivot pin 61 has a support projection 5 of a mounting arm 57 formed on the actuator body 14 of the spring actuator 10, as shown in FIGS.
A lever 100 for actuating the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 is swingably provided between 9, 59, and one end 100a of the lever 100 is pushed as shown in FIG. Parking that is engaged with the groove 85 of the head portion 83 of the bolt 82 screwed to the rod 12, and the other end portion 100b of the lever 100 is movably provided on the inner caliper arm 6a formed on the caliper body 4 of the spring brake device 1. It is engaged with the outer end of the brake piston 11.

The lever 100 is a spring brake device 1.
The moving force transmission mechanism 13 for transmitting the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 to the parking brake piston 11.

As shown in FIG. 3, a manual release bolt 20 projecting toward the piston 15 is provided at the center of the end cover 18 on the same central axis as the push rod 12, and one end of the manual release bolt 20 is provided. A head 22 having a non-circular cross section is formed in the.

As shown in FIG. 4, the other end of the manual release bolt 20 is inserted into the bolt insertion hole 91 of the cover body 90 of the end cover 18, and the other end of the manual release bolt 20 is manually inserted. The release nut 24 is screwed, and the split pin 105 is inserted through the other end of the manual release bolt 20 and a locking hole (not shown) provided through the manual release nut 24 for manual release. The bolt 20 is movably supported by a manual release nut 24 via a washer 106 in a bolt insertion hole 91 of the end cover 18, and a split pin 105
Serves as a detent for the manual release nut 24 with respect to the manual release bolt 20.

At the rear portion of the piston 15 on the side opposite to the push rod 12, as shown in FIG.
An adjuster nut 17 that engages with 0 is disposed, and the adjuster nut 17 has a cylindrical nut body 110, and one end of the nut body 110 of the adjuster nut 17 has an annular wall 111 extending in the circumferential direction. The piston 15 is formed on the front surface of the annular wall 111 of the adjuster nut 17.
A cylindrical fitting wall 112 that fits outside the cylindrical wall 72 of the piston 15 is formed, and the inner peripheral surface of the fitting wall 112 of the adjuster nut 17 is screwed to the external thread portion 73 of the cylindrical wall 72 of the piston 15. A mating female thread 113 is formed.

At the center of the annular wall 111 of the adjuster nut 17, as shown in FIG. 4, there is formed a fitting recess 21 into which the head 22 of the manual releasing bolt 20 which opens forward toward the piston 15 is fitted. Adjuster nut 1
An end wall 114 is formed at the other end of the nut body 110 of No. 7, and a bolt insertion hole 115 for inserting the manual release bolt 20 is provided in the end wall 114 of the adjuster nut 17.

As shown in FIG. 4, the manual release bolt 20 is inserted into the bolt insertion hole 115 of the end wall 114 of the adjuster nut 17, and the annular wall 1 of the adjuster nut 17 is inserted.
In the fitting recess 21 of 11, the head 2 of the manual release bolt 20
2 is inserted, and the male thread portion 7 of the cylindrical wall 72 of the piston 15 is inserted.
A female thread portion 113 of the fitting wall 112 of the adjuster nut 17 is screwed into the screw 3.

The nut body 110 of the adjuster nut 17
3 and 4, the end wall 114 of the adjuster nut 17 and the head 2 of the manual release bolt 20 are placed inside the
A compression coil spring 23 that constantly urges the manual release bolt 20 toward the piston 15 is provided between
The manual release nut 24 screwed to the other end of the manual release bolt 20 is pressed against the end surface of the boss 92 formed on the end cover 18 by the urging force of the compression coil spring 23.

On the outside of the boss 92 formed on the end cover 18, as shown in FIG. 4, a rubber cover 117 is attached to cover the manual release nut 24 screwed to the tip of the manual release bolt 20, and the end is attached. The locking ring 11 of the rubber cover 117 is provided in the annular groove 93 formed in the boss 92 of the cover 18.
8 is inserted, and the end cover 1 of the manual release bolt 20
The other end protruding from the bolt insertion hole 91 of No. 8 and the manual release nut 24 are protected from dust by the rubber cover 117.

The outside of the end wall 16 of the actuator body 14 of the spring actuator 10 is shown in FIGS.
As shown in FIG. 3, three fluid pressure cylinders 48 are arranged in an off-center circumferential direction. Inside the cylindrical cylinder body 120 of the fluid pressure cylinder 48, as shown in FIGS. , A hydraulic piston 121 is movably provided along a central axis direction parallel to the push rod 12, and a piston rod 122 is provided at the center of the hydraulic piston 121 so as to project along a horizontal central axis line. The end wall 123 of the cylinder body 120 of the cylinder 48 and the hydraulic piston 121
A hydraulic chamber 124 is formed between the piston rod 1 and
Reference numeral 22 is inserted into and retractable from a through hole 52 provided in the end wall 16 of the actuator body 14.

Hydraulic piston 121 of hydraulic cylinder 48
As shown in FIG. 4, an annular groove 125 is formed on the outer peripheral surface of the hydraulic cylinder 121, and a ring-shaped piston seal 126 is fitted in the annular groove 125 of the hydraulic piston 121. A piston seal 126 seals a space between the inner peripheral surface of and the outer peripheral surface of the hydraulic piston 121.

Cylinder body 12 of fluid pressure cylinder 48
As shown in FIG. 1, mounting pieces 127, 127 extending toward both sides are formed at one end of 0, and the mounting pieces 127, 127 of the cylinder body 120 of the fluid pressure cylinder 48 are the actuator bodies of the spring actuator 10. It is fixed to the end wall 16 of 14 with bolts 128, 128.

As shown in FIG. 1, the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 includes a parking brake piston 11, a pivot pin 61, a lever 100, a spring actuator 10, and a fluid pressure. It is composed of a cylinder 48.

Next, the operation of the spring actuator device according to the first embodiment of the present invention will be described. First, in a state where the braking of the wheels 5 of the railway vehicle by the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 shown in FIG. 1 is released, the fluid pressure chamber 124 inside the cylinder body 120 of the fluid pressure cylinder 48 is introduced. When the fluid pressure to be sent is released, the piston 15 of the spring actuator 10 advances toward the end wall 16 of the actuator body 14 of the spring actuator 10 by the urging force of the compression coil springs 45 and 46 of the urging means 19, and the adjuster nut 17 moves. As the piston 15 advances, the push rod 12 is driven along the longitudinal direction of the manual release bolt 20 while resisting the urging force of the compression coil spring 23, and the push rod 12 moves as the piston 15 advances and the actuator body 14 of the spring actuator 10 moves. Towards the outside of Poured, as illustrated in FIG. 5, one end of the actuator body 14 of the push rod 12
The end wall 16 is projected forward from the rod insertion hole 51.

The extension of the actuator body 14 of the spring actuator 10 along with the advancement of the piston 15 of the push rod 12 causes the bolt 82 to move forward of the actuator head 54 of the actuator body 14 as the push rod 12 extends. The groove 85 of the head portion 83 of the bolt 82 pushes out the one end portion 100a of the lever 100, and the lever 100 swings counterclockwise in FIG. 3 with the pivot pin 61 as a fulcrum along with the movement of the bolt 82 to move. Lever 100 that is force transmission mechanism 13
Transmits the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 of the spring brake device 1 to the parking brake piston 11, and the other end 100b of the lever 100 to the caliper body 4 of the spring brake device 1. The built-in parking brake piston 11 is pushed toward the inner rotor 33a mounted inside the wheel 5 of the railway vehicle.

By swinging the pivot pin 61 as a fulcrum with the movement of the bolt 82 of the lever 100, the parking brake piston 11 provided on the inner caliper arm 6a of the caliper body 4 of the spring brake device 1 swings the lever 100. The inner brake lining 8a attached to the inner end of the parking brake piston 11 is attached to the inner side of the wheel 5 of the railway vehicle. It is pressed against the inner rotor 33a.

When the inner brake lining 8a mounted on the inner end of the parking brake piston 11 is pressed against the inner rotor 33a mounted inside the wheel 5 of the railway vehicle, the outer caliper arm formed on the caliper body 4 of the spring brake device 1 is pressed. 6b receives a reaction force due to the pressing of the inner brake lining 8a, the caliper body 4 of the spring brake device 1 moves by the reaction force together with the two slide pins 3 and 3 with respect to the mounting bracket 2, and the spring actuator 10 causes the spring brake. It moves with the caliper body 4 of the device 1.

By moving the caliper body 4 of the spring brake device 1 with respect to the mounting bracket 2, the outer brake lining 8b mounted inside the outer caliper arm 6b of the caliper body 4 of the spring brake device 1 is placed outside the wheels 5 of the railway vehicle. The parking brake 9 pressed against the mounted outer rotor 33b and incorporated in the caliper body 4 of the spring brake device 1 is actuated by the spring actuator 10, and the wheels 5 of the railway vehicle are incorporated in the caliper body 4 of the spring brake device 1 in the parking brake 9. Is braked by.

Compression coil springs 45, 46 of the biasing means 19 of the piston 15 of the spring actuator 10.
As the piston rod 122 of the fluid pressure cylinder 48 retracts toward the inside of the cylinder body 120 as the piston 15 moves forward, the fluid pressure of the fluid pressure cylinder 48 is increased by the forward movement of the fluid pressure cylinder 48 toward the end wall 16 of the actuator body 14. The piston 121 retracts as the piston rod 122 retracts, and the outer surface of the flange 71 of the piston 15 of the spring actuator 10 is compressed by the compression coil spring 4.
5, 46 is pressed against the tip of the piston rod 122 of the fluid pressure cylinder 48, and the forward movement of the compression coil springs 45, 46 of the piston 15 of the spring actuator 10 is advanced as shown in FIG. It is blocked by 48 piston rods 122.

Further, when the braking by the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 of the wheel 5 of the railway vehicle is released, the fluid pressure is set as shown in FIG.
When the fluid is sent to the hydraulic chamber 124 inside the cylinder body 120 of the fluid pressure cylinder 48, the hydraulic piston 121 of the fluid pressure cylinder 48 causes the fluid pressure inside the cylinder body 120 to cause an end wall of the actuator body 14 of the spring actuator 10. 16, the piston rod 122 of the fluid pressure cylinder 48 causes the piston rod 122 of the spring actuator 10 to move as the hydraulic piston 121 moves forward.
5, while extending the inside of the actuator body 14 while pressing the flange 71, the tip end of the piston rod 122 of the fluid pressure cylinder 48 penetrates the end wall 16 of the actuator body 14 of the spring actuator 10 as shown in FIG. It is in a state of protruding from the hole 52 toward the inside of the actuator body 14.

Piston rod 12 of fluid pressure cylinder 48
The extension of the spring actuator 10 into the actuator body 14 as the hydraulic piston 121 of FIG.
5 is the compression coil springs 45, 4 of the urging means 19 as the piston rod 122 of the fluid pressure cylinder 48 extends.
6 is retracted toward the end cover 18 while resisting the urging force of the piston 6, the adjuster nut 17 is driven along the longitudinal direction of the manual release bolt 20 as the piston 15 is retracted, and the push rod 12 is moved toward the piston 15. While retracting, the spring actuator 10 retracts toward the inside of the actuator body 14.

As the piston 15 of the push rod 12 retracts, the spring actuator 10 retracts inside the actuator body 14, causing the bolt 82 to move toward the actuator head 54 of the actuator body 14 as the push rod 12 contracts. , The lever 100 swings in the clockwise direction in FIG. 5 around the pivot pin 61 as the bolt 82 moves, and the lever 100, which is the moving force transmission mechanism 13, is attached to the caliper body 4 of the spring brake device 1. The moving force of the push rod 12 of the actuator 10 is transmitted to the parking brake piston 11, and the other end 100b of the lever 100 is incorporated in the caliper body 4 of the spring brake device 1 for the parking brake piston 11.
The inner rotor 33 in which the wheels are mounted inside the wheels 5 of the railway vehicle.
Retreat in the direction away from a.

When the lever 100 swings about the pivot pin 61 as the bolt 82 moves, the parking brake piston 11 provided on the inner caliper arm 6a of the caliper body 4 of the spring brake device 1 swings the lever 100. Accordingly, the inner brake lining 8a mounted on the inner end of the parking brake piston 11 is mounted on the inner side of the wheel 5 of the railway vehicle while retracting in the direction of separating from the inner rotor 33a mounted on the inner side of the wheel 5 of the railway vehicle. Separated from the inner rotor 33a.

The inner brake lining 8a mounted on the inner end of the parking brake piston 11 is separated from the inner rotor 33a mounted on the inner side of the wheel 5 of the railway vehicle, whereby the caliper body 4 of the spring brake device 1 is separated.
Moves with respect to the mounting bracket 2 together with the two slide pins 3 and 3, and the spring actuator 1
0 moves with the caliper body 4 of the spring brake device 1, and the outer brake lining 8b mounted on the inner side of the outer caliper arm 6b of the caliper body 4 of the spring brake device 1 moves from the outer rotor 33b mounted on the outer side of the wheel 5 of the railway vehicle. It can be separated.

After that, the caliper body 4 of the spring brake device 1 moves together with the two slide pins 3 and 3 with respect to the mounting bracket 2 due to the movement and vibration of the wheels 5 caused by the traveling of the railway vehicle, and the spring actuator 10 moves. It moves together with the caliper body 4 of the spring brake device 1, and the gap between the inner rotor 33a and the inner brake lining 8a of the wheel 5 of the railway vehicle and the outer rotor 33b and the outer brake lining 8b.
And the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 is deactivated by the spring actuator 10 and the caliper of the spring brake device 1 of the wheel 5 of the railway vehicle is restored. The braking by the parking brake 9 incorporated in the body 4 is released.

The compression coil springs 45, 46 of the urging means 19 are provided for the piston 15 of the spring actuator 10.
At the time of a power failure in which the fluid pressure cylinder 48 cannot be moved backward against the urging force of the spring actuator 10 or when the spring actuator 10 is disassembled, first, the manual release bolt 2 is released.
The rubber cover 117 that covers the manual release nut 24 screwed to the other end of 0 is removed from the boss 92 of the end cover 18, and the split pin 105 is provided on the other end of the manual release bolt 20 and the manual release nut 24. Removed from the locking hole (not shown).

Next, when the manual release nut 24 is rotated in the direction in which the manual release bolt 20 is manually tightened, the head 22 of the manual release bolt 20 and the fitting recess 21 of the adjuster nut 17 are not cross-sectioned. Since they are fitted in a circular shape, the manual release bolt 20 is replaced with the manual release nut 24.
Of the compression coil spring 23, the head 22 of the manual release bolt 20 compresses the compression coil spring 23 to move the adjuster nut 17 in place while rotating against the urging force of the compression coil spring 23 without rotating. It contacts the inner end of the recess 21.

Thereafter, the manual release nut 24 is rotated in the direction in which it is tightened by hand with respect to the manual release bolt 20 so that the manual release bolt 20 does not rotate as the manual release nut 24 rotates. Move in the direction,
The adjuster nut 17 retracts toward the end cover 18 as the manual release bolt 20 moves, and the piston 15 of the spring actuator 10 together with the adjuster nut 17 presses the compression coil spring 4 of the biasing means 19.
As shown in FIG. 6, the push rod 12 retracts toward the inside of the actuator body 14 of the spring actuator 10 as the piston 15 retracts, while the push rod 12 retracts against the urging force of the actuators 5, 46. Thus, the other end of the manual release bolt 20 is in a state of protruding outward from the boss 92 of the end cover 18.

As the piston 15 of the push rod 12 retracts, the spring actuator 10 retracts inside the actuator body 14, causing the bolt 82 to move toward the actuator head 54 of the actuator body 14 as the push rod 12 contracts. , The lever 100 swings in the clockwise direction in FIG. 5 around the pivot pin 61 as the bolt 82 moves, and the lever 100, which is the moving force transmission mechanism 13, is attached to the caliper body 4 of the spring brake device 1. The moving force of the push rod 12 of the actuator 10 is transmitted to the parking brake piston 11, and the other end 100b of the lever 100 is incorporated in the caliper body 4 of the spring brake device 1 for the parking brake piston 11.
The inner rotor 33 in which the wheels are mounted inside the wheels 5 of the railway vehicle.
The wheel 5 of the railway vehicle is retracted in the direction of separating from a.
The braking by the parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 is released.

By disposing the caliper body 4 and the spring actuator 10 of the spring brake device 1 so as to sandwich the two slide pins 3 and 3 as shown in FIGS. 7 and 8, the entire spring brake device 1 is arranged. The position of the center of gravity G of the calipers approaches the vicinity of the two slide pins 3 and 3, and the caliper body 4 is attached to the mounting bracket 2.
With respect to the caliper body 4 of the spring brake device 1, the couple force to the two slide pins 3 and 3 of the caliper body 4 is reduced, and the mounting bracket 2 and the two slide pins 3 and 3 and the caliper body 4 are Wear and wear of the formed contact portions with the actuator mounting portions 34 and 35 due to vibrations of the railway vehicle during traveling are reduced.

FIG. 9 is a schematic side view showing a spring brake device according to a second embodiment of the present invention, and FIG. 10 is a plan view of a main portion of FIG. Spring brake device 1
As shown in FIGS. 9 and 10, the caliper body 4 has a parking brake 9 incorporated therein which is different from that of the first embodiment shown in FIG.

As shown in FIGS. 9 and 10, the spring brake device 1 includes a spring actuator 10 in which a parking brake 9 is fixed to a caliper body 4, and
Inner caliper arm 6 formed on caliper body 4
1 for transmitting the moving force of the parking brake piston 11 movably provided to a and the push rod 12 of the spring actuator 10 attached to the caliper body 4 to the parking brake piston 11. It is provided with a wedge type moving force transmission mechanism 13 different from the form.

In the spring brake device 1, as shown in FIGS. 9 and 10, the spring actuator 10 has two spring actuators.
The caliper body 4 so that it sandwiches the slide pins 3 and 3 of the book.
Is arranged against.

As shown in FIGS. 9 and 10, a spring actuator 10 is fixed to the caliper body 4 of the spring brake device 1 in a direction intersecting the central axis of the slide pin 3.

Outside the inner caliper arm 6a and the actuator mounting portion 34 formed on the caliper body 4, a link 130 is movably arranged in a direction intersecting with the central axis of the slide pin 3, as shown in FIG. As shown in FIG. 10, a bent piece 131 that is bent at a right angle and is parallel to the slide pin 3 is formed at one end of the link 130.
The tip of the bent piece 131 of the link 130 is engaged with the tip of the push rod 12 of the spring actuator 10, and the wedge (not shown) attached to the other end of the link 130 is attached to the caliper body 4 of the spring brake device 1. It is engaged with the outer end of a parking brake piston 11 movably provided on the formed inner caliper arm 6a.

The wedge type moving force transmission mechanism 13 for transmitting the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 of the spring brake device 1 to the parking brake piston 11 is composed of the link 130 and the wedge. Become.

On the outside of the inner caliper arm 6a formed on the caliper body 4 of the spring brake device 1,
As shown in FIG. 10, a guide member 132 for guiding the link 130 is attached.

The parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 is composed of a parking brake piston 11, a link 130, a wedge, a spring actuator 10, and a fluid pressure cylinder 48.

Since the other structure of the spring actuator device according to the second embodiment of the present invention is completely the same as that of the first embodiment shown in FIG. 1, the same parts are designated by the same reference numerals. Is omitted.

Next, the operation of the spring actuator device according to the second embodiment of the present invention will be described. First, the piston 1 of the spring actuator 10
When the push rod 5 moves toward the end wall 16 of the actuator body 14 by the biasing force of the biasing means 19, the push rod 1
2 is extended toward the outside of the actuator body 14 of the spring actuator 10 as the piston 15 moves forward.

The extension of the actuator body 14 of the spring actuator 10 along with the forward movement of the piston 15 of the push rod 12 causes the link 130 to move along with the extension of the push rod 12, and the link 130 which is the moving force transmission mechanism 13. Transmits the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 of the spring brake device 1 to the parking brake piston 11, and the parking brake piston 11 incorporated in the caliper body 4 of the spring brake device 1 is As the link 130 moves, it is pushed toward the inner rotor 33a attached to the inside of the wheel 5 of the railway vehicle while engaging with the wedge.

By disposing the caliper body 4 and the spring actuator 10 of the spring brake device 1 so as to sandwich the two slide pins 3 and 3, as shown in FIGS. 9 and 10, the entire spring brake device 1 is arranged. Since the position of the center of gravity G of the caliper approaches the vicinity of the two slide pins 3 and 3, the caliper body 4 does not tilt with respect to the mounting bracket 2, and the spring brake device 1
The contact force between the mounting bracket 2 and the two slide pins 3 and 3 and the actuator mounting portions 34 and 35 formed on the caliper body 4 by reducing the couple force to the two slide pins 3 and 3 of the caliper body 4. To reduce wear and wear due to vibration when the railroad vehicle is running.

FIG. 11 is a schematic side view showing a spring brake device according to a third embodiment of the present invention, and FIG. 12 is a plan view of a main portion of FIG. As shown in FIGS. 11 and 12, a parking brake 9 different from that of the second embodiment shown in FIG. 9 is incorporated in the caliper body 4 of the spring brake device 1.

As shown in FIGS. 11 and 12, the spring brake device 1 includes a spring actuator 10 having a parking brake 9 fixed to a caliper body 4.
And the parking brake piston 11 movably provided on the inner caliper arm 6a formed on the caliper body 4, and the moving force of the push rod 12 of the spring actuator 10 mounted on the caliper body 4 to the parking brake piston 11. And a screw type moving force transmission mechanism 13 different from that of the second embodiment shown in FIG.

As shown in FIGS. 11 and 12, the spring brake device 1 is arranged with respect to the caliper body 4 such that the spring actuator 10 sandwiches the two slide pins 3 and 3.

As shown in FIGS. 11 and 12, the spring actuator 10 is fixed to the caliper body 4 of the spring brake device 1 in the vertical direction.

Outside the inner caliper arm 6a and the actuator mounting portion 34 formed on the caliper body 4, as shown in FIG. 11, a horizontal link 140 is arranged so as to be vertically movable, and At one end, as shown in FIG. 12, a bent piece 141 that is obliquely bent toward the push rod 12 of the spring actuator 10.
The tip of the bent piece 141 of the link 140 is engaged with the tip of the push rod 12 of the spring actuator 10, and the other end of the link 140 is formed on the caliper body 4 of the spring brake device 1. Is engaged with the piston shaft 142 at the outer end of the parking brake piston 11 that is movably provided.

The screw type moving force transmission mechanism 13 for transmitting the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 of the spring brake device 1 to the parking brake piston 11 includes a link 140 and a parking brake. And a screw mechanism (not shown) that moves while rotating the piston shaft 142 of the working piston 11.

The parking brake 9 incorporated in the caliper body 4 of the spring brake device 1 is composed of a parking brake piston 11, a link 140, a screw mechanism, a spring actuator 10, and a fluid pressure cylinder 48.

Further, the other structure of the spring actuator device according to the third embodiment of the present invention is exactly the same as that of the second embodiment shown in FIG. Is omitted.

Next, the operation of the spring actuator device according to the third embodiment of the present invention will be described. First, the piston 1 of the spring actuator 10
When the push rod 5 moves toward the end wall 16 of the actuator body 14 by the biasing force of the biasing means 19, the push rod 1
2 extends upward toward the outside of the actuator body 14 of the spring actuator 10 as the piston 15 advances.

The extension of the actuator body 14 of the spring actuator 10 with the forward movement of the piston 15 of the push rod 12 causes the link 140 to rise as the push rod 12 extends, and the link 140 which is the moving force transmission mechanism 13. Transmits the moving force of the push rod 12 of the spring actuator 10 attached to the caliper body 4 of the spring brake device 1 to the parking brake piston 11, and the screw mechanism moves the caliper body of the spring brake device 1 as the link 140 rises. 4 is moved while rotating the piston axis of the parking brake piston 11 incorporated therein, and the parking brake piston 11 incorporated in the caliper body 4 of the spring brake device 1 is lifted by the link 140 so that So that the pushed toward the inner rotor 33a which is attached to the inside of the wheel 5.

By disposing the caliper body 4 and the spring actuator 10 of the spring brake device 1 so as to sandwich the two slide pins 3 and 3, as shown in FIGS. 11 and 12, the spring brake device 1
The position of the overall center of gravity G approaches the vicinity of the two slide pins 3 and 3, the caliper body 4 does not tilt with respect to the mounting bracket 2, and the two slide pins 3 of the caliper body 4 of the spring brake device 1 Wear of the mounting bracket 2 and the two slide pins 3 and 3 and the actuator mounting portions 34 and 35 formed on the caliper body 4 due to vibration when the railway vehicle is running, Reduce wear and tear.

As a moving force transmitting mechanism for transmitting the moving force of the push rod of the spring actuator attached to the caliper body of the spring brake device to the parking brake piston, the parking brake piston is connected to the railcar by a link and a cam. A cam type in which the inner rotor mounted on the inside of the wheel is pushed toward the inner rotor may be used.

[0102]

As described above, according to the spring brake device of the present invention, the parking brake is integrally incorporated in the caliper body of the normal floating type caliper brake. It is possible to use common parts such as the brake shoe and the second brake shoe.

According to the spring brake device of the present invention, when the parking brake is not required, the spring actuator, the parking brake piston, and the moving force transmission mechanism are simply removed from the caliper body, so that the pneumatic and hydraulic pressure can be reduced. Since this is a normal floating type caliper brake operated by fluid pressure, it can be used as a common caliper body regardless of the presence or absence of a parking brake.

According to the spring brake device of the present invention, since the caliper body and the spring actuator are arranged so as to sandwich the slide pin, the center of gravity of the entire device can be brought close to the vicinity of the slide pin, and the caliper body is supported. Since the couple to the slide pin of the caliper body is not tilted with respect to the body, wear and wear due to vibration of the contact portion between the support, the slide pin and the caliper body can be reduced.

According to the spring brake device of the present invention, at the time of power failure or disassembly of the spring actuator, it is only necessary to manually rotate the manual release nut with respect to the manual release bolt, and the head of the manual release bolt and the adjuster are adjusted. The non-circular cross-section fits into the fitting recess of the nut, so the manual release bolt can be moved without rotating while resisting the biasing force of the retaining spring as the manual release nut rotates. Yes, since the adjuster nut retracts toward the end cover as the manual release bolt moves, the piston can be retracted toward the end cover while resisting the biasing force of the biasing means together with the adjuster nut. Inside the actuator body of the spring actuator as the push rod retracts with the piston Since it retracts toward the side, the operation of the parking brake spring actuator can be released, and the holding spring urges the head of the manual release bolt toward the piston, so that the posture of the manual release bolt can be maintained. It can be maintained in a stable state by the urging force of the spring, and the manual release bolt can be easily attached to the end cover only by screwing the manual release nut on the manual release bolt.

[Brief description of drawings]

FIG. 1 is a cutaway side view of essential parts showing a spring brake device according to a first embodiment of the present invention.

FIG. 2 is a plan view of the spring brake device according to the first embodiment of the present invention.

FIG. 3 is a fragmentary plan view showing a state in which a spring actuator of a spring brake device is attached to a caliper body.

FIG. 4 is an enlarged sectional view of a spring actuator.

FIG. 5 is a fragmentary plan view showing an operating state of a spring actuator.

FIG. 6 is an enlarged cross-sectional view when manually releasing the moving force of the push rod of the spring actuator with a manual releasing bolt.

FIG. 7 is a schematic side view showing a spring brake device according to the first embodiment of the present invention.

FIG. 8 is a cutaway plan view of a main part of FIG.

FIG. 9 is a schematic side view showing a spring brake device according to a second embodiment of the present invention.

FIG. 10 is a cutaway plan view of a main part of FIG.

FIG. 11 is a schematic side view showing a spring brake device according to a third embodiment of the present invention.

FIG. 12 is a cutaway plan view of a main part of FIG. 11.

[Explanation of symbols]

1 Spring brake device 2 mounting bracket 3 slide pins 4 caliper body 5 wheels 6a Inner caliper arm 6b Outer caliper arm 7 Caliper brake cylinder 8a Inner brake lining 8b outer brake lining 9 Parking brake 10 Spring actuator 11 Piston for parking brake 12 push rod 13 Moving force transmission mechanism 14 Actuator body 15 pistons 16 end wall 17 Adjuster nut 18 End cover 19 Biasing means 20 Manual release bolt 21 Fitting recess 22 head 23 Compression coil spring 24 Manual release nut 25 Upper anchor block 26 Ankapin 27 anchor bolt 28 Lower anchor block 29 Ankapin 30 anchor bolts 31 Upper anchor block 32 anchor bolts 33a Inner rotor 33b outer rotor 34 Actuator mounting part 35 Actuator mounting part 36 screw holes 37 screw holes 38 through hole 40 dolly frame 41 bolts 42 nuts 45 compression coil spring 46 compression coil spring 48 fluid pressure cylinder 50 perimeter wall 51 Rod insertion hole 52 through hole 53 Boss 54 Actuator head 55 annular groove 56 Auto adjuster mechanism 57 mounting arm 58 through hole 59 Support protrusion 60 support holes 61 Pivot Pin 62 Mount 63 screw holes 64 openings 65 screw holes 66 volts 67 volts 70 Piston body 71 flange 72 tubular wall 73 Male thread 74 End wall 75 Fitting hole 76 screw holes 77 Small diameter part 78 screw holes 79 Set screw 80 washers 82 Volts 83 head 84 annular groove 85 groove 87 boots 88 Locking ring 89 Locking ring 90 Cover body 91 Bolt insertion hole 92 Boss 93 annular groove 94 annular groove 95 flange 96 through holes 97 volts 98 washers 99 O-ring 100 lever 100a One end 100b the other end 105 split pin 106 washers 110 nut body 111 Ring wall 112 Mating wall 113 Female thread 114 end wall 115 bolt insertion hole 117 rubber cover 118 Locking ring 120 cylinder body 121 hydraulic piston 122 Piston rod 123 End wall 124 Hydraulic chamber 125 annular groove 126 Piston seal 127 mounting piece 128 volts 130 links 131 bent pieces 132 Guide member 140 links 141 bent pieces 142 Piston shaft G center of gravity

Continued front page    F-term (reference) 3D048 AA04 BB11 BB52 CC64 HH60                       QQ12                 3J058 AA44 AA48 AA53 AA63 AA74                       AA77 BA64 CB12 CC03 CC07                       CC19 CC22 CC66 CC72 CC78                       FA01 FA11 FA21

Claims (3)

[Claims] 1. A support, a caliper body slidably supported by the support via two slide pins, and first and second caliper arms formed on the caliper body straddling wheels. A caliper brake of a floating type, comprising: a caliper brake cylinder mounted on a first caliper arm, and first and second brakes held by first and second caliper arms. The body is equipped with a lever type parking mechanism. The parking mechanism has a spring actuator fixed to the caliper body, a hydraulic piston arranged on the other side against a spring provided on one side of the spring actuator, and a hydraulic piston inside. And a perkin movably provided on the first caliper arm formed on the caliper body. When releasing the fluid pressure in the brake piston and the hydraulic chamber formed between the hydraulic piston and the hydraulic cylinder, the moving force of the push rod of the spring actuator, which is pressed by the spring, is transmitted to the parking brake piston. And a moving force transmission mechanism for moving the spring brake device. 2. The spring brake device according to claim 1, wherein the spring actuator is arranged with respect to the caliper body so as to sandwich the slide pin. 3. The spring actuator comprises an actuator body, a piston movably disposed inside the actuator body along a central axis direction, and one end of an actuator body fixed to the piston along the central axis line. Push rod that penetrates the end wall, adjuster nut that is screwed to the side opposite to the push rod of the piston, end cover that is installed at the other end of the actuator body opening, Of the adjuster, the push rod and the manual release bolt that retracts the piston supported by the end cover movably along the central axis against the urging force of the urging means, and the adjuster nut. The head with a non-circular cross section at one end of the manual release bolt fitted in the fitting recess is urged toward the piston. The spring brake device according to claim 1, further comprising a holding spring and a manual release nut screwed to the other end of the manual release bolt protruding from the end cover.