JP2009115208A - Caliper brake device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caliper brake device for a vehicle exhibiting original brake force of a brake block. <P>SOLUTION: This caliper brake device for the vehicle includes an actuator 60 pressing the brake block 7 to a disk 6. The actuator 60 is provided with a cylinder 70 formed in a caliper body 10, an elastic film 75 attached to the cylinder 70, and an elastic film chamber 63 defined between the cylinder 70 and the elastic film 75 and supplied with air pressure (fluid pressure) in braking. The elastic film 75 presses and operates the brake block 7 by air pressure supplied to the elastic film chamber 63 in braking. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an improvement in a caliper brake device for a vehicle that applies a frictional force across a disk that rotates with wheels.

  In general, a hydraulic brake of a railway vehicle is equipped with an air-oil converter that converts an air pressure supplied from an air pressure source into an oil pressure, and the hydraulic brake is operated by the oil pressure supplied from the air-oil converter via a hydraulic pipe. It has become.

  In recent years, it has been desired to mount a pneumatic brake that is operated by a pneumatic pressure supplied from a pneumatic pressure source on a railway vehicle and to eliminate the air-oil converter and the hydraulic piping.

  Patent Documents 1 and 2 disclose a railway vehicle brake device that presses and operates a brake member by hydraulic pressure supplied to a hydraulic cylinder.

Patent Document 3 discloses a railway vehicle brake device that presses and operates a brake member by air pressure supplied to an actuator using an air chamber.
JP-A-8-226469 JP-A-8-226471 Japanese Patent Laid-Open No. 11-193835

  However, in such a conventional brake device for a railway vehicle, the hydraulic cylinder or actuator does not press the entire control, but presses a part of the control, so that the caliper body is caused by this pressing reaction force. When the disk is deformed or the disk rotation surface is deformed, the local temperature rise of the control wheel will cause the friction coefficient of the control wheel to decrease, and the brake force inherent to the control wheel will not be achieved. There is a problem that uneven wear occurs.

  Further, in the case of the lever type pneumatic brake shown in FIG. 6 of Patent Document 3, it is difficult to push the restrictor in parallel with the disk due to the influence of frictional force acting on the lever bearing portion, and uneven wear of the restrictor is difficult. There was a problem that occurred.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a caliper brake device for a vehicle that can exhibit the braking force inherent to the control device.

  The present invention relates to a caliper brake device for a vehicle, a disk that rotates together with wheels, left and right brake members that apply frictional force across the disk, a caliper body that is supported by a vehicle body, and an actuator that presses the brake wheel against the disk. The actuator includes an elastic film attached to the caliper body and an elastic film chamber defined by the elastic film, and the elastic film swells and is restrained by the fluid pressure guided to the elastic film chamber during braking. The structure is such that the ring is pressed against the disc.

  According to the present invention, when the elastic membrane swells and presses the baffle against the rotating surface of the disc, the caliper body is bent by the pressing reaction force or the rotating surface of the disc is deformed. And the control member is pressed parallel to the disc with a uniform surface pressure against the rotating surface of the disc. As a result, the friction coefficient of the restrictor is kept high, the braking force inherent to the restrictor is exhibited, and the local temperature rise of the restrictor and the disk is suppressed, thereby preventing uneven wear of the restrictor and the disk.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a plan view of the caliper brake device 1, and FIG. 3 is a side view. Here, three axes of X, Y, and Z orthogonal to each other are set, the X axis extends in the horizontal horizontal direction, the Y axis extends in the vertical direction, and the Z axis extends in the horizontal front-rear direction, and the configuration of the caliper brake device 1 is described. To do.

  The caliper brake device 1 holds a disk 6 of a wheel 5 between a pair of restrictors 7 and brakes the rotation of the wheel 5.

  In FIG. 1, reference numeral 20 denotes a support frame fixed on a carriage (not shown) of the railway vehicle. As shown in FIG. 3, in the caliper brake device 1, the caliper body 10 is floatingly supported on the support frame 20 by the upper and lower slide pins 30 and 32 so as to be slidable in the X-axis direction.

  FIG. 2 is a sectional view around the upper slide pin 30. As shown in FIG. 2, both end portions of the upper slide pin 30 are supported by the bracket portions 15 and 16 of the caliper body 10, and a rubber bush 33 is interposed between the upper slide pin 30 and the support frame 20. The caliper body 10 is floatingly supported with respect to the support frame 20 so as to be slidable in the X-axis direction, and the caliper body 10 is supported with respect to the support frame 20 so as to be swingable about the Z axis. As a result, the caliper body 10 follows the swinging of the wheels 5 with respect to the carriage, and the respective restrictors 7 face each other in parallel with the disks 6 of the wheels 5.

  A rubber boot 34 is interposed between the bracket portions 15 and 16 and the support frame 20, and the exposed portions of the upper and lower slide pins 30 and 32 are protected from dust by the boot 34.

  The caliper body 10 includes first and second caliper arms 12 and 14 that extend so as to straddle the disk 6 of the wheel 5, and a yoke portion 13 that connects the first and second caliper arms 12 and 14.

  FIG. 4 is a cross-sectional view of the restrictor 7 and the first caliper arm 12 along the line AA in FIG. As shown in FIG. 4, adjusters 41 are fastened to the upper and lower ends of the first caliper arm 12 via anchor bolts 42, and both ends of the restrictor 7 are supported via anchor pins 43 protruding from the adjuster 41. Is done.

  The adjuster 41 is provided with a return spring 44 that urges the restrictor 7 away from the disk 6 via the anchor pin 43, and a gap adjusting mechanism 45 that adjusts the gap between the restrictor 7 and the disk 6 to be substantially constant when the brake is released. When the brake is released, the brake 7 is separated from the disk 6 by the urging force of the return spring 44, and the gap with the disk 6 is adjusted to be substantially constant by the gap adjusting mechanism 45.

  The restrictor 7 is attached via a guide plate 8. The guide plate 8 engages with each anchor pin 43 at its upper and lower end portions, and is supported so as to be able to advance and retract with respect to the disk 6 via each anchor pin 43, and is advanced and retracted with respect to the disk 6 by the expansion / contraction operation of the elastic film 75. To be driven.

  The restrictor 7 includes a lining 9 that is in sliding contact with the disk 6, and a lining back plate 91 provided on the back of the lining 9.

  The guide plate 8 has a dovetail groove extending in the vertical direction (Y-axis direction), and a lining back plate 91 is fitted in the dovetail groove. When the control 7 is mounted, with the lower adjuster 41 removed from the caliper body 10, the lining back plate 91 is inserted into the dovetail groove of the guide plate 8 from below, and then two lower adjusters 41 are mounted on the caliper body 10. Are fastened via the anchor bolt 42. As a result, both end portions of the lining back plate 91 engage with the anchor pins 43 protruding from the adjusters 41, and the brake 7 is supported in the Y-axis direction.

  Adjusters 41 are fastened to the upper and lower ends of the first caliper arm 12 via anchor bolts 42, and both end portions of the control ring 7 are supported via anchor pins 43 protruding from the adjuster 41.

  Note that the structure is not limited to the structure in which the restrictor 7 is supported on each anchor pin 43 via the guide plate 8 as described above, and the guide plate 8 may be eliminated and the restrictor 7 may be supported only by each anchor pin 43. .

  As shown in FIG. 1, the actuator 60 is provided only on the first caliper arm 12 side.

  As shown in FIG. 4, the actuator 60 is disposed between the adjusters 41. The upper and lower ends of the first caliper arm 12 are formed with adjuster mounting recesses 12a and 12b in which the adjuster 41 is interposed, and the cylinder 70 is formed between the adjuster mounting recesses 12a and 12b.

  The actuator 60 includes a cylinder 70 formed in the caliper portion 12 f of the first caliper arm 12, an elastic film 75 attached to the cylinder 70, and an elastic film chamber defined between the cylinder 70 and the elastic film 75. 63, and the elastic film 75 presses the restrictor 7 in the X-axis direction by the air pressure guided to the elastic film chamber 63 and presses the restrictor 7 against the disk 6.

  The cylinder 70 has a cylindrical inner wall 71 extending in the X-axis direction along the elastic membrane chamber 63, a planar cylinder bottom wall 72 extending in the Y-axis and Z-axis directions inside the cylinder inner wall 71, and elastic And an annular mounting seat 73 to which the peripheral edge 76 of the membrane 75 is mounted. The mounting seat 73 is formed in a planar shape extending in the Y-axis and Z-axis directions around the cylinder inner wall 71.

  The cylinder inner wall 71 includes front and rear curved wall portions 71c and 71d that are curved and extend along the lining 9 of the brake 7 and upper and lower arc-shaped wall portions that extend in an arc shape by connecting the front and rear curved wall portions 71c and 71d. 71a, 71b.

  In the cylinder inner wall 71, the front curved wall portion 71 c is curved in a concave shape with respect to the elastic membrane chamber 63, while the rear curved wall portion 71 d is curved in a convex shape with respect to the elastic membrane chamber 63.

  The cylinder 70 and the adjuster mounting recesses 12 a and 12 b are formed symmetrically with respect to the center line Oz of the caliper main body 10, similarly to the control 7. The arcuate wall portions 71a and 71b of the cylinder inner wall 71 are formed to face in opposite directions with respect to the adjuster mounting recesses 12a and 12b.

  In FIG. 5B, the part where the elastic film chamber 63 is formed is shown by hatching. The elastic membrane chamber 63 defined by the cylinder inner wall 71 has a cross-sectional shape extending along the lining 9 of the restrictor 7 and faces the lining 9 of the restrictor 7 in a wide range.

  A peripheral edge 76 of the elastic film 75 is fastened to the mounting seat 73 by a plurality of bolts 66 via a retainer 65.

  The elastic film 75 is formed of a resin elastic material, and a peripheral portion 76 sandwiched between the mounting seat 73 and the retainer 65, a bellows portion 77 that expands and contracts along the cylinder inner wall 71, and a pressing force that faces the control ring 7. Part 79. The bellows portion 77 is extended by the air pressure guided to the elastic membrane chamber 63, and the pressing portion 79 presses the brake ring 7.

  The elastic film 75 may be formed of a bellows using a resin elastic material combined with a reinforcing material such as carbon fiber or Kevlar fiber. Further, the elastic film may be formed by using a bellows made of a thin metal plate, a rubber tube, or a diaphragm.

  A heat insulating plate 61 is interposed between the pressing portion 79 of the elastic film 75 and the guide plate 8. The heat insulating plate 61 is formed of a heat insulating material and suppresses the heat of the brake 7 from being transmitted to the elastic film 75.

  The heat insulating plate 61 has the same shape as the pressing portion 79 of the elastic film 75, and has the same area as the pressing portion 79 or an area larger than the pressing portion 79. Thereby, the elastic film 75 is prevented from contacting the guide plate 8.

  A reinforcing plate 62 attached to the back surface of the pressing portion 79 of the elastic film 75 is provided. The reinforcing plate 62 is fastened to the heat insulating plate 61 via a plurality of bolts 67. Each bolt 67 passes through the reinforcing plate 62 and the pressing portion 79 of the elastic film 75 and is screwed into the heat insulating plate 61. The reinforcing plate 62 is formed in a plate shape having the same shape as the pressing portion 79 of the elastic film 75, and the bolts 67 are arranged along the peripheral portion of the reinforcing plate 62 at substantially equal intervals.

  The first caliper arm 12 is formed with a through hole 69 for introducing pressurized air to the elastic membrane chamber 63. The through hole 69 is disposed on the center line Oz of the caliper body 10 and is formed by machining.

  The caliper body 10 is formed with a through hole 69, and the through hole 69 communicates with a pneumatic source of the railway vehicle via a pipe (not shown). Pressurized air from this air pressure source is supplied to the elastic membrane chamber 63 via a switching valve (not shown). In response to a command from a controller (not shown), the switching valve guides pressurized air from the air pressure source to the elastic membrane chamber 63 during braking, and guides atmospheric pressure to the elastic membrane chamber 63 during non-braking.

  In addition, not only providing a common air pressure source between the actuator 60 and the suspension air spring, but also an air pressure source of the actuator 60 and an air pressure source of the suspension air spring may be provided.

  As described above, the caliper brake device 1 is configured, and the atmospheric pressure is guided to the elastic film chamber 63 when the brake is released, and the brake 7 is separated from the disk 6 by the urging force of the return spring 44 provided in the adjuster 41. At this time, the elastic film 75 contracts following the brake 7.

  The elastic film 75 is swelled by the air pressure guided to the elastic film chamber 63 at the time of braking, and presses the brake 7, so that the brake 7 applies a frictional force to the disk 6 and brakes the wheel 5.

  FIG. 5A shows a conventional hydraulic piston caliper brake device in which a pair of pistons presses the brake 7 against the disc by the hydraulic pressure guided to the hydraulic chamber 48.

In this conventional hydraulic piston caliper brake device, the dimensions of the cylinder 47 and the maximum hydraulic pressure guided to the hydraulic chamber 48 are set as follows, and a required pressing force of about 20 kN is obtained. In FIG. 5A, the part where the hydraulic chamber 48 is formed is indicated by hatching.
Diameter of cylinder 47: φ38 mm × 2 cross-sectional area of cylinder 47 (piston pressure receiving area): 2268 mm ²
Oil pressure: 9MPa
Pressing force = 2268 × 9 = about 20 kN
FIG. 5 (b) shows the pneumatic elastic membrane caliper brake device 1 of the present invention, in which the cross-sectional area of the cylinder 70 and the maximum air pressure guided to the elastic membrane chamber 63 are set as follows, and the necessary pressing force is set. As a result, approximately 20 kN equivalent to the conventional hydraulic piston type caliper brake device can be obtained.
Cross-sectional area of cylinder 70 (pressure receiving area of elastic membrane 75): 27697 mm ²
Air pressure: 0.75 MPa (700 kPa)
Pressing force = 27697 × 0.75 = about 20 kN
As described above, the actuator 60 can sufficiently secure the pressure receiving area of the elastic film 75 in the limited space of the caliper body 10 and can apply the required pressing force to the restrictor 7.

  As described above, the elastic membrane type caliper brake device 1 of the present invention is supported by the disc 6 that rotates together with the wheel 5, the left and right brake members 7 that apply frictional force across the disc 6, and the carriage (vehicle body). The caliper body 10 and an actuator 60 that presses the brake 7 against the disk 6 are provided. The actuator 60 includes an elastic film 75 attached to the caliper body 10 and an elastic film chamber 63 defined by the elastic film 75. The elastic film 75 is expanded by the air pressure (fluid pressure) guided to the elastic film chamber 63 at the time of braking, and the control 7 is pressed against the disk 6.

  Since the elastic film 75 swells and presses the control ring 7 against the disk 6, when the caliper body 10 bends due to the pressing reaction force or when the rotation surface of the disk 6 is deformed, the elastic film 75 is formed on this. Following this, the brake element 7 is pressed against the rotating surface of the disk 6 with a uniform surface pressure. As a result, the friction coefficient of the restrictor 7 is kept high, the local temperature rise of the restrictor 7 and the disk 6 is suppressed, and the braking force inherent to the restrictor 7 is exhibited. The occurrence of uneven wear can be prevented.

  Even when the first caliper arm portion 12 of the caliper body 10 is bent away from the disk 6 of the wheel 5 during braking, the brake 7 is kept parallel to the rotation surface of the disk 6 and the lining 9 rotates the disk 6. It is possible to prevent uneven wear in the radial direction.

  The actuator 60 is operated by the air pressure supplied to the elastic film chamber 63 from the air pressure source mounted on the railway vehicle, so that the elastic film 75 presses the control 7. Therefore, the air-oil converter (hydraulic power source) mounted on the railway vehicle. And hydraulic piping are not required, and the weight of railway vehicles can be reduced.

  The elastic membrane type caliper brake device is not limited to this, and a hydraulic actuator may be provided to guide the hydraulic pressure to the elastic membrane chamber. In this case, the pressure receiving area of the actuator is expanded compared to the conventional hydraulic piston type caliper brake device, so that it is possible to secure the pressing force required for the actuator at a low hydraulic pressure, and no pressure increase by the air-oil converter is required. The oil converter can be downsized.

  Further, since the caliper body 10 is slidably supported via the upper and lower slide pins 30 and 32, the first caliper arm 12 and the second caliper arm extending so as to straddle the disk 6 are used. The actuator 60 can be provided only on the caliper arm 12, and the number of parts constituting the actuator 60 can be reduced, and the caliper brake device 1 can be prevented from being enlarged.

  In the present embodiment, the caliper main body 10 is provided with a pair of anchor pins 43 that support the restrictor 7 so as to be able to advance and retreat relative to the disk 6, and the elastic film chamber 63 is disposed between the anchor pins 43. The movement of inflating and pressing the restrictor 7 against the disk 6 is smoothly performed via each anchor pin 43, and the pressure receiving area of the elastic film 75 is sufficiently secured in the space between the anchor pins 43, so that the required pressing force is obtained. It becomes possible to give to the wide range of the control 7.

  In the present embodiment, a pair of adjusters 41 arranged so as to sandwich the actuator 60 is provided, and this adjuster 41 is provided with a return spring 44 for urging the control member 7 away from the disk 6 via an anchor pin 43 and a brake. Since the clearance adjustment mechanism 45 that adjusts the clearance between the control device 7 and the disk 6 at the time of release is provided, the elastic film 75 expands and the motion of pressing the control device 7 against the disk 6 is smoothly performed through the adjusters 41. In addition, a sufficient pressure receiving area of the elastic film 75 can be secured in the space between the adjusters 41, and the required pressing force can be applied to a wide range of the brake 7.

  In the present embodiment, the caliper body 10 includes a cylindrical cylinder inner wall 71 that defines the elastic membrane chamber 63, a cylinder bottom wall 72 that defines the elastic membrane chamber 63 inside the cylinder inner wall 71, and Since the annular mounting seat 73 to which the peripheral edge portion 76 of the elastic film 75 is attached is provided, the actuator 60 can be accommodated in the caliper body 10 in a compact manner, and the caliper body 10 can be prevented from being enlarged.

  In the present embodiment, the lining 9 of the brake 7 that is in sliding contact with the disk 6 has a shape along the disk 6, and the cylinder inner wall 71 is curved along the lining 9 before and after the curved wall portions 71 c and 71 d. And the upper and lower arcuate wall portions 71a and 71b connecting the front and rear curved wall portions 71c and 71d and extending in an arcuate shape, the pressure receiving area of the elastic film 75 is sufficiently large in the limited space of the caliper body 10. In addition, the durability of the elastic film 75 can be ensured without the peripheral edge 76 of the elastic film 75 being bent.

  In the present embodiment, the elastic film 75 of the actuator 60 has a pressing portion 79 that faces the restrictor 7, and the heat insulating plate 61 is interposed between the pressing portion 79 and the restrictor 7. It is possible to prevent heat from being transmitted to the elastic film 75 and to secure the heat resistance of the elastic film 75 made of a resin elastic material or the like.

  In the present embodiment, the elastic film 75 of the actuator 60 has a pressing portion 79 that faces the control member 7, and the reinforcing plate 62 that is attached to the back surface of the pressing portion 79 is provided. The rigidity of the portion where 79 hits the heat insulating plate 61 can be increased, and the strength of the pressing portion 79 can be increased.

  However, the present invention is not limited to this, and the reinforcing plate attached to the back surface of the pressing portion 79 can be eliminated as shown in FIG. In this case, the followability of the pressing portion 79 with respect to the control wheel 7 can be improved.

  In the present embodiment, since the guide plate 8 coupled to the anchor pin 43 and supporting the restrictor 7 is provided, the rigidity for supporting the restrictor 7 can be increased, and the work for attaching and detaching the restrictor 7 can be performed via the guide plate 8. Easy to do.

  Next, another embodiment shown in FIGS. 7 and 8 will be described. This basically has the same configuration as that of the embodiment shown in FIGS. 1 to 6, and only different portions will be described. In addition, the same code | symbol is attached | subjected to the same structure part as the said embodiment.

  The actuator 60 includes a cylinder 80 formed in the caliper portion 12f of the first caliper arm 12, an elastic film 75 attached to the cylinder 80, a cover 92 fastened to the cylinder 80, the cylinder 80, and the elastic film 75. An elastic membrane chamber 63 defined between the covers 92 is provided, and the elastic membrane 75 presses the brake 7 in the X-axis direction by the air pressure guided to the elastic membrane chamber 63, and the brake 7 is attached to the disk 6. Press.

  The cylinder 80 includes a cylindrical cylinder side wall 82 extending in the X-axis direction along the elastic film chamber 63, and an annular mounting seat 81 to which the peripheral edge 76 of the elastic film 75 is mounted. The mounting seat 81 is formed in a planar shape extending in the Y-axis and Z-axis directions.

  The plate-like cover 92 has a substantially oval outer shape, like the mounting seat 81, and is formed symmetrically with respect to the center line Oz of the control wheel 7 as with the mounting seat 81.

  A plurality of screw holes are formed in the mounting seat 81 with a predetermined interval, and a cover 92 is fastened via a bolt 84 that is screwed into each screw hole. A peripheral edge 76 of the elastic film 75 is sandwiched between the mounting seat 81 and the cover 92.

  As shown in FIG. 7, the cylinder side wall 82 of the caliper main body 10 connects the front and rear curved wall portions 82 c and 82 d that are curved and extended along the lining 9 of the restrictor 7, and the front and rear curved wall portions 82 c and 82 d. And upper and lower arc-shaped wall portions 82a and 82b extending in an arc shape. As a result, the elastic film chamber 63 defined by the elastic film 75 on the inner side of the cylinder side wall 82 faces the lining 9 of the restrictor 7 in a wide range.

  The front and rear curved wall portions 82c and 82d are concavely curved with respect to the elastic film chamber 63, and both are formed symmetrically with respect to the center line Oz of the control device 7.

  In the caliper main body 10, a chamfered portion 83 that is curved in a circular arc shape is formed between the mounting seat 81 and the cylinder side wall 82, and the mounting seat 81 and the cylinder side wall 82 are connected by the chamfered portion 83.

  In FIG. 7, the chamfered portion 83 is formed in a substantially oval annular shape that bulges in an arc shape over the entire circumference. Thereby, the elastic film 75 is prevented from being bent along the chamfered portion 83.

  The elastic film 75 is formed of a resin elastic material, and a peripheral portion 76 sandwiched between the mounting seat 81 and the cover 92, a bellows portion 77 that expands and contracts along the cylinder side wall 82, and a pressing force that faces the restrictor 7. Part 79. The bellows portion 77 is extended by the air pressure guided to the elastic membrane chamber 63, and the pressing portion 79 presses the brake ring 7.

  As shown in FIG. 8, a heat insulating plate 61 is interposed between the pressing portion 79 of the elastic film 75 and the guide plate 8. The heat insulating plate 61 is formed of a heat insulating material and suppresses the heat of the brake 7 from being transmitted to the elastic film 75.

  The restrictor 7 includes a lining back plate 97 to which the lining 9 is attached, and a lining back plate 91 to be attached to the lining back plate 97.

  Both end portions of the guide plate 8 are coupled to the respective anchor pins 43 by engaging with the annular grooves 98 of the respective anchor pins 43. The guide plate 8 has a dovetail groove extending in the vertical direction, and a lining back plate 91 is fitted in the dovetail groove. The restrictor 7 is supported in the Y-axis direction by engaging both end portions of the lining back plate 91 with the anchor pins 43.

  As described above, the caliper brake device 1 is configured, and the atmospheric pressure is guided to the elastic film chamber 63 when the brake is released, and the brake 7 is separated from the disk 6 by the urging force of the return spring 44 provided in the adjuster 41. At this time, the elastic film 75 contracts following the brake 7.

  The elastic film 75 is swelled by the air pressure guided to the elastic film chamber 63 at the time of braking, and presses the brake 7, so that the brake 7 applies a frictional force to the disk 6 and brakes the wheel 5.

  In the present embodiment, the caliper body 10 has the cylinder side wall 82 that extends in a cylindrical surface surrounding the bellows portion 77 where the elastic film 75 expands and contracts. It is restricted by the cylinder side wall 82 that the portion 77 swells in the direction parallel to the disk 6, the elastic film 75 reduces the air flow rate required to press the brake 7, and the elastic film 75 presses the brake 7. The response of braking the wheel 5 can be improved.

  In the present embodiment, the cylinder side wall 82 includes one curved wall portion 82c that curves and extends along the lining 9, the other curved wall portion 82d that curves in a symmetrical manner with the curved wall portion 82c, Since the upper and lower arcuate wall portions 82a and 82b extending in an arc shape connecting the curved wall portions 82c and 82d are secured, a sufficient pressure receiving area of the elastic film 75 is ensured in a limited space of the caliper body 10, and The elastic film 75 can ensure the durability of the elastic film 75 without causing a portion to be bent along the cylinder side wall 82.

  In the present embodiment, the caliper body 10 has an annular mounting seat 81 to which the peripheral edge 76 of the elastic film 75 is attached, and a cover 92 that sandwiches the peripheral edge 76 of the elastic film 75 between the mounting seat 81. Since the elastic film chamber 63 is defined between the cover 92 and the elastic film 75, the actuator 60 can be accommodated in the caliper body 10 in a compact manner, and the caliper body 10 can be prevented from being enlarged.

  In the present embodiment, the caliper body 10 is formed with a chamfered portion 83 that is curved in a circular arc shape between the mounting seat 81 and the cylinder side wall 82, and the chamfered portion 83 swells in an arc shape over the entire circumference. Since the elastic film 75 is formed in an annular shape, the elastic film 75 does not have a portion that bends along the chamfered portion 83, and the durability of the elastic film 75 can be improved.

  In the present embodiment, since the guide plate 8 coupled to the anchor pin 43 and supporting the restrictor 7 is provided, the rigidity for supporting the restrictor 7 can be increased, and the work for attaching and detaching the restrictor 7 can be performed via the guide plate 8. Easy to do.

  In other embodiments shown in FIGS. 9 and 10, the guide plate is abolished and the restrictor 7 is supported only by the anchor pins 43.

  The restrictor 7 includes a lining 9 that is in sliding contact with the disk 6 and a lining back plate 97 to which a back portion of the lining 9 is attached.

  Each anchor pin 43 is formed with an annular groove 49, and engaging portions 85 that engage with the annular groove 86 are formed at the upper and lower ends of the lining back plate 97.

  The brake 7 is supported so as to be able to advance and retreat with respect to the disk 6 by the engagement of each engaging portion 85 with the annular groove 86 of each anchor pin 43, and is advanced and retracted with respect to the disk 6 by the expansion / contraction operation of the elastic film 75. To be driven.

  Each anchor pin 43 is formed with an annular groove 86, and engaging portions 85 that engage with the annular groove 86 are formed at the upper and lower ends of the brake 7.

  A heat insulating plate 61 is interposed between the pressing portion 79 of the elastic film 75 and the lining back plate 97. The heat insulating plate 61 is formed of a heat insulating material and suppresses the heat of the brake 7 from being transmitted to the elastic film 75.

  The brake 7 is supported so as to be able to advance and retreat with respect to the disk 6 by the engagement of each engaging portion 85 with the annular groove 86 of each anchor pin 43, and is advanced and retracted with respect to the disk 6 by the expansion / contraction operation of the elastic film 75. To be driven.

  In the present embodiment, since both ends of the restrictor 7 are coupled to the anchor pins 43, the guide plate is eliminated, the structure is simplified, and the caliper body 10 can be downsized in the X-axis direction.

  In each embodiment, the actuator 60 is provided only on the first caliper arm 12, but the present invention is not limited to this, and the actuator 60 may be provided on both the first caliper arm 12 and the second caliper arm. In this case, the caliper body 10 need not be floatingly supported so as to be slidable in the X-axis direction, and is fixed to the caliper body 10 carriage (vehicle body).

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

The top view of the caliper brake device which shows embodiment of this invention. Sectional drawing around the same upper slide pin. Similarly side view. Sectional drawing which follows the AA line of FIG. Similarly, a side view of the control wheel. Sectional drawing of the caliper brake device which shows other embodiment of this invention. The side view of the caliper brake device which shows other embodiment of this invention. Sectional drawing which follows the AA line of FIG. The side view of the caliper brake device which shows other embodiment of this invention. Sectional drawing which follows the AA line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Caliper brake device 5 Wheel 6 Disc 7 Control device 8 Guide plate 9 Lining 10 Caliper main body 12 First caliper arm 41 Adjuster 43 Anchor pin 44 Return spring 45 Clearance adjustment mechanism 60 Actuator 61 Heat insulation plate 62 Reinforcement plate 63 Elastic film chamber 70 Cylinder 71 Cylinder inner walls 71a and 71b Arc-shaped wall portions 71c and 71d Curved wall portion 72 Cylinder bottom wall 73 Mounting seat 75 Elastic film 76 Peripheral portion 77 Bellows portion 79 Pressing portion 81 Mounting seat 82 Cylinder side walls 82a and 82b Arc-shaped wall portions 82c and 82d Curved wall 83 Chamfer 92 Cover

Claims (12)

A disc that rotates with the wheels,
The left and right brake members that apply friction force across this disc,
A caliper body supported by the vehicle body;
An actuator that presses the restrictor against the disk;
This actuator
An elastic membrane attached to the caliper body;
An elastic membrane chamber defined by the elastic membrane,
A caliper brake device for a vehicle, characterized in that the elastic film expands due to fluid pressure guided to the elastic film chamber during braking and presses the brake device against the disk. The caliper body includes a pair of anchor pins that support the control member so as to be movable back and forth with respect to the disk,
2. The caliper brake device for a vehicle according to claim 1, wherein the elastic membrane chamber is disposed between the anchor pins. A pair of adjusters arranged to sandwich the actuator;
This adjuster
A return spring that urges the restrictor away from the disk via the anchor pin;
The vehicle caliper brake device according to claim 1, further comprising a clearance adjustment mechanism that adjusts a clearance between the brake member and the disk to be substantially constant when braking is released. The elastic membrane has a pressing portion that faces the control wheel,
The caliper brake device for a vehicle according to any one of claims 1 to 3, wherein a heat insulating plate is interposed between the pressing portion and the restrictor. The caliper body is
A cylindrical cylinder inner wall defining the elastic membrane chamber;
A cylinder bottom wall defining the elastic membrane chamber inside the cylinder inner wall;
The vehicle caliper brake device according to any one of claims 1 to 4, further comprising an annular mounting seat to which a peripheral edge portion of the elastic film is mounted. The lining of the brake member that is in sliding contact with the disc has a shape along the disc;
The cylinder inner wall is
Front and rear curved walls extending curvedly along the lining;
6. The caliper brake device for a vehicle according to claim 5, further comprising upper and lower arcuate wall portions extending in an arc shape by connecting the front and rear curved wall portions. The elastic membrane has a pressing portion that faces the control wheel,
The vehicle caliper brake device according to any one of claims 1 to 6, further comprising a reinforcing plate attached to the pressing portion. The caliper body has a cylinder side wall that extends in a cylindrical shape surrounding the bellows portion of the elastic membrane that expands and contracts,
This cylinder side wall
One curved wall extending curvedly along the lining;
The other curved wall extending symmetrically with the curved wall, and
The caliper brake device for a vehicle according to any one of claims 1 to 4, further comprising upper and lower arcuate wall portions that connect the curved walls and extend in an arc shape. The caliper body has an annular mounting seat to which the peripheral edge of the elastic membrane is mounted,
A cover for sandwiching a peripheral edge of the elastic membrane between the mounting seat and
The caliper brake device for a vehicle according to claim 8, wherein the elastic film chamber is defined between the cover and the elastic film. The caliper body is formed with a chamfered portion curved in a circular arc shape between the mounting seat and the cylinder side wall,
10. The caliper brake device for a vehicle according to claim 9, wherein the chamfered portion is formed in an annular shape that bulges in an arc shape over the entire circumference.   The vehicle caliper brake device according to any one of claims 2 to 10, further comprising a guide plate coupled to each of the anchor pins and supporting the control device.   The vehicle caliper brake device according to any one of claims 2 to 10, wherein both end portions of the control wheel are coupled to the anchor pins.

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