CN101285511B - Brake pressure cylinder device and brake tongs device - Google Patents

Brake pressure cylinder device and brake tongs device Download PDF

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Publication number
CN101285511B
CN101285511B CN2008100917424A CN200810091742A CN101285511B CN 101285511 B CN101285511 B CN 101285511B CN 2008100917424 A CN2008100917424 A CN 2008100917424A CN 200810091742 A CN200810091742 A CN 200810091742A CN 101285511 B CN101285511 B CN 101285511B
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CN
China
Prior art keywords
piston
brake
push rod
guide element
spring
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Expired - Fee Related
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CN2008100917424A
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Chinese (zh)
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CN101285511A (en
Inventor
麻野吉雄
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Nabtesco Corp
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Nabtesco Corp
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Publication of CN101285511A publication Critical patent/CN101285511A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D65/00—Parts or details
    • F16D65/38—Slack adjusters
    • F16D65/40—Slack adjusters mechanical
    • F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
    • F16D65/56—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with screw-thread and nut
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/04—Cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/08—Seals, e.g. piston seals
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2125/00—Components of actuators
    • F16D2125/02—Fluid-pressure mechanisms
    • F16D2125/10—Plural pistons interacting by fluid pressure, e.g. hydraulic force amplifiers using different sized pistons

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

The invention relates to a brake pressure cylinder device and a brake caliper device; the brake pressure cylinder device has a common brake mechanism, a spring brake mechanism, a push rod and a projection length adjusting mechanism; the projection length adjusting mechanism has a leading part which is mounted on the push rod by moving together with the push rod and acting on the established resistance when the push rod moves for adjusting the projection length projected from the cylinder body. The projection length adjusting mechanism further has a recess arranged in the leading part, and a limiting mechanism; the limiting mechanism has a blocking part blocked with the recess arranged between a second piston and a first spring for limiting the movable area of the first piston on the movable direction.

Description

Brake pressure cylinder device and brake tongs device
2007-104970 number (application on April 12nd, 2007) requires preference to the application according to Japanese patent application.
Technical field
The present invention relates to brake pressure cylinder device and have the brake tongs device of this brake pressure cylinder device, this brake pressure cylinder device has and is used to make the push rod of vehicle with the arrestment mechanism action, when braking maneuver, can adjust this push rod automatically from the outstanding outstanding length of cylinder body.
Background technique
About adjusting the brake pressure cylinder device of push rod automatically from the outstanding outstanding length of cylinder body, the brake pressure cylinder device of structure as described below is disclosed in patent documentation 1 (Japan's special fair 6-67725 communique (claim 1, Fig. 2)), this brake pressure cylinder device has in cylinder: output piston, with the push rod of the brake shoe binding that is used for the brake wheel tread; The friction ring assembly body constitutes and uses elastic ring of two plectane clampings and it is expanded to radial outside open, and increases the sliding-frictional resistance of itself and cylinder internal surface.In this patent documentation 1, record, in the braking maneuver process, wear and tear as if brake shoe, then output piston and friction ring assembly body and this wear extent correspondingly move, but when braking is lax, because of slip resistance die friction ring assembly body does not move, consequently, can guarantee between brake shoe and wheel tread, to have corresponding gap.In addition, structure as described below is disclosed in patent documentation 1, promptly at the central part of friction ring assembly body, utilize nut that multidiameter shaft is installed, side end face at output piston is fixed with end plate by mounting screw, is equipped with lax spring between flange that is formed at multidiameter shaft one end and end plate, has also put down in writing following content, promptly limit, make the rate of travel of output piston and friction ring assembly body be no more than set gap.
In addition, as the rail truck arrestment mechanism, disclose the brake pressure cylinder device of structure as described below in patent documentation 2 (Japanese kokai publication sho 63-125834 communique), in this brake pressure cylinder device, service braking mechanism and spring braking mechanism all can move.This service braking mechanism is used for common running and utilizes air pressure and move; This spring braking mechanism is used for stopping for a long time situations such as vehicle, even if there is not air pressure also can move by spring.
By to the disclosed brake pressure cylinder devices such, that have service braking mechanism and spring braking mechanism of patent documentation 2, be provided with as patent documentation 1 can be adjusted the outstanding length adjusting mechanism of the outstanding length that push rod gives prominence to from the cylinder body disclosed automatically when braking maneuver, think to can further improve convenience as brake pressure cylinder device.
But, in patent documentation 1, as above-mentioned outstanding length adjusting mechanism, form with friction ring assembly body is only disclosed, have the mechanism of the rate of travel of the output piston of push rod and friction ring assembly body as restriction, also only disclose mechanism with special constructions such as multidiameter shaft corresponding with the outstanding length adjusting mechanism of realizing by the friction ring assembly body.Therefore, in brake pressure cylinder device, if the outstanding length adjusting mechanism of the patent documentation 1 described structure of packing into then causes complicated, hugeization of mechanism with service braking mechanism and spring braking mechanism.In addition, in brake pressure cylinder device with service braking mechanism and spring braking mechanism, use patent documentation 1 disclosed special construction, in outstanding length adjusting mechanism, be difficult to realize to limit the adjustable range of the outstanding length of push rod and mechanism that can not adjustment range.
Summary of the invention
The present invention makes in view of above-mentioned truth, the brake tongs device that purpose is a kind of brake pressure cylinder device is provided and has this brake pressure cylinder device, this brake pressure cylinder device has service braking mechanism, spring braking mechanism and adjusts the regulating mechanism of the outstanding length of push rod, complicated, hugeization that can suppress mechanism also can use simple mechanism to realize the adjustable range of the outstanding length of restriction push rod and mechanism that can not adjustment range.
To achieve these goals, the brake pressure cylinder device of first invention is a kind of brake pressure cylinder device, in for motor vehicle arrestment mechanism, use, it is characterized in that, possess: service braking mechanism, has first piston, on this first piston, the active force of first spring and act on round about from the pressure of first pressure chamber, by to described first pressure chamber's supply pressure fluid, overcome the active force of described first spring, described first piston relatively moves with respect to the cylinder body and moves to braking direction; Can be with the mobile push rod of described first piston; Outstanding length adjusting mechanism, has guide element, this guide element with can with described push rod move and when the movement direction that described push rod is parallel to described first piston relatively moves the mode of the set resistance of effect be installed on described push rod, when braking maneuver, the outstanding length that described push rod was given prominence to from described cylinder body on the movement direction of described first piston when this outstanding length adjusting mechanism adjustment braking was removed; And spring braking mechanism, has second piston, on this second piston, the active force of second spring and act on round about from the pressure of second pressure chamber, and described push rod connects this second piston, by forward the state of discharging fluid to from the state to described second pressure chamber's supply pressure fluid, by the active force of described second spring, described second piston moves to described braking direction, and via described service braking mechanism described push rod is applied active force; Described outstanding length adjusting mechanism also has: recess or the protuberance of being located at described guide element; And limting mechanism, have the engagement portion that engages with described recess or protuberance, be equipped between described second piston and described first spring, and limit the movable range of described guide element on described first piston movement direction.
According to this invention, second piston with the mobile push rod perforation spring braking mechanism of the first piston of service braking mechanism between the guide element of push rod and outstanding length adjusting mechanism, acts on set resistance.Therefore, in brake pressure cylinder device, can prevent complicated or hugeization of locking mechanism and form compactly with service braking mechanism, spring braking mechanism and outstanding length adjusting mechanism.In addition, in outstanding length adjusting mechanism, has limting mechanism, this limting mechanism is equipped between second piston and first spring, has the engagement portion that engages with the recess of being located at guide element or protuberance, and is made of the simple structure of the movable range that limits guide element.Therefore, can by simple mechanism limit the outstanding length of push rod adjustable range and can not adjustment range.
Therefore, according to the present invention, a kind of brake pressure cylinder device can be provided, this brake pressure cylinder device has service braking mechanism, spring braking mechanism and adjusts the regulating mechanism of the outstanding length of push rod, complicated, hugeization that can suppress mechanism, and can realize the adjustable range of the outstanding length of restriction push rod and mechanism that can not adjustment range by simple mechanism.
The brake pressure cylinder device of second invention is on the basis of first brake pressure cylinder device, it is characterized in that, described limting mechanism engages with described recess or protuberance by making described engagement portion, also limits the movable range on the sense of rotation that described guide element is the center at the axle with described first piston.
According to this structure,, also can realize the rotation stopping function of guide element by recess or protuberance and limting mechanism with the engagement portion that engages with this recess or protuberance.Therefore, the function and the rotation stopping function of the movable range of restriction guide element on the first piston movement direction can be realized, simple more mechanism can be formed by a limting mechanism.
The brake pressure cylinder device of the 3rd invention is on the basis of first invention or second brake pressure cylinder device, it is characterized in that, described recess or protuberance are located at a plurality of positions on the described guide element, and described engagement portion and described each recess or protuberance are located at a plurality of positions on the described limting mechanism respectively accordingly.
According to this invention, many by being provided with to corresponding concave part or protuberance and engagement portion, can bear load dispersedly at the partial action that engages mutually, can be reduced in the wearing and tearing of recess or protuberance, engagement portion generation, improve durability.
On the basis of arbitrary brake pressure cylinder device of the brake pressure cylinder device of the 4th invention in first invention～the three invention, it is characterized in that, described limting mechanism is provided with as partition wall, this partition wall is separated the zone that sets described service braking mechanism and is set the zone of described spring braking mechanism in described cylinder body, core at described partition wall, be formed with the opening portion that connects for described guide element, the edge section that forms described opening portion is located in described engagement portion, the size of described opening portion forms, between the edge section of the external diameter of described guide element and this opening portion, can on whole circumference, there be the gap, so that in assembling during brake pressure cylinder device, can in this opening portion, connect described guide element and described recess or protuberance are engaged with described engagement portion.
According to this invention, because of the partition wall of limting mechanism as the zone of zone of separating service braking mechanism and spring braking mechanism is provided with, so limting mechanism can be formed thin planar and form simple structure.Therefore, in brake pressure cylinder device, but the simple limting mechanism of space availability ratio highland collocating structure.In addition, when the assembling brake pressure cylinder device, recess or protuberance are engaged with the engagement portion,, can improve the efficient of assembling operation so can easily carry out assembling operation because of can via set gap guide element being connected at the opening portion of partition wall.
On the basis of arbitrary brake pressure cylinder device of the brake pressure cylinder device of the 5th invention in first invention～the four invention, it is characterized in that, described partition wall and described guide element are configured to, with respect to the radial center position of described opening portion, the radial center position off-centre of described guide element.
According to this invention, the center off-centre of the relative opening portion in center by making guide element, can easily be achieved as follows described structure by simple structure: when the assembling brake pressure cylinder device, can make the guide element perforation and recess or protuberance are engaged with the engagement portion via set gap at the opening portion of partition wall.
On the basis of arbitrary brake pressure cylinder device of the brake pressure cylinder device of the 6th invention in first invention～the five invention, it is characterized in that, described outstanding length adjusting mechanism also has: arrange concavo-convex repeatedly and male and fomale(M﹠F) that form at the movement direction of this push rod of the outer surface upper edge of described push rod, and be configured in elastic member between described push rod and the described guide element, described elastic member engages with described male and fomale(M﹠F) by distortion, described thus guide element and described push rod link, and, if to the described guide element effect both power more than the sizing, then described elastic member distortion and cross the convex portion of described male and fomale(M﹠F), described push rod is with respect to described guide element displacement.
In the past, for example according to the structure of patent documentation 1 record, because of only producing slip resistance by smooth cylinder inner peripheral surface and the frictional force between the elastic ring surface, so according to the situations such as abrasion on the surface condition of cylinder inner peripheral surface or abrasion, elastic ring surface, it is unstable that the slip resistance of friction ring assembly body becomes easily.In addition, because be to utilize the adjustment screw to adjust, so may make the adjustment of slip resistance and management become complicated.
But, according to the present invention, because of elastic member is the form that engages (nipping) by distortion, so can make frictional force or combination force between push rod and guide element stable.Thus, can easily carry out the adjustment and the management of slip resistance by simple structure.
On the basis of arbitrary brake pressure cylinder device of the brake pressure cylinder device of the 7th invention in first invention～the six invention, it is characterized in that, described outstanding length adjusting mechanism also has the axostylus axostyle that moves and be equipped with described push rod with described first piston, described push rod forms has the cylindric of axis hole that the movement direction with described first piston extends abreast, and, screw thread is processed with internal thread at least a portion of the internal surface of this axis hole, described axostylus axostyle screw thread at least a portion of outer surface is processed with the outside thread that combines with described internal thread screw thread, and screw thread is inserted in the described axis hole.
According to this invention, push rod is attached on the axostylus axostyle that moves with first piston by screw thread and installs, so can move the outstanding length that absorbs push rod by the screw thread that axostylus axostyle carries out relative to push rod.Therefore, even if under the state that the outstanding length of push rod has been adjusted, can prevent also that the relative cylinder body of first piston from producing position deflection, can realize the volume of first pressure chamber is roughly kept certain structure.
On the basis of arbitrary brake pressure cylinder device of the brake pressure cylinder device of the 8th invention in first invention～the seven invention, it is characterized in that, described outstanding length adjusting mechanism also has outer cylinder member, this outer cylinder member is equipped between the described guide element and described second piston of configuration around the described push rod, and this outer cylinder member is at the described guide element of internal configurations, and move with described first piston, described spring braking mechanism at described second piston when described braking direction moves, card by this second piston and described outer cylinder member ends, and via the described first piston of described outer cylinder member and described service braking mechanism described push rod is applied active force.
According to this invention, second piston is by with being disposed at outer cylinder member engaging between the guide element and second piston and that first piston moves, and can apply active force to push rod.Therefore, can be by setting with the outer cylinder member of simple shape formation, can be achieved as follows described structure by simple mechanism: when braking direction moved, mechanism applied active force to push rod via service braking at second piston.
In addition, as the invention of other viewpoints, also can constitute the invention of brake tongs device with above-mentioned arbitrary brake pressure cylinder device.Promptly, the brake tongs device of the 9th invention has arbitrary brake pressure cylinder device in first invention～the eight invention and the pincers body of equipping this brake pressure cylinder device and installing in the mode that the chassis with respect to vehicle can relatively move on axial direction, by making this brake pressure cylinder device action, produce braking force by the dish of a pair of brake shoe clamping axletree side that is installed on this pincers body.
According to this invention, can realize having the brake tongs device of brake pressure cylinder device, this brake pressure cylinder device has the regulating mechanism of the outstanding length of service braking mechanism, spring braking mechanism and push rod, complicated, hugeization that can suppress mechanism also can realize the adjustable range of the outstanding length of restriction push rod and mechanism that can not adjustment range by simple mechanism.
The brake tongs device of the tenth invention is on the basis of the brake tongs device of the 9th invention, it is characterized in that, described pincers body via rocking pin with respect to described chassis installing around the mode of parallel with the direct of travel of vehicle axle swing, the described brake pressure cylinder device that this brake tongs device possessed is provided with first pressure fluid path that is communicated with described first pressure chamber and the second pressure fluid path that is communicated with described second pressure chamber on described cylinder body, from the described first pressure fluid path to the outside opening of described cylinder body and give first row of giving mouthful of row pressure power fluid, with from the described second pressure fluid path to the outside opening of described cylinder body and mouthful be adapted to for second row of giving of row pressure power fluid respectively, be positioned at vertical lower with respect to described rocking pin.
According to this invention, cause first row's of giving mouth and second row's of giving mouth are positioned at the vertical lower of rocking pin, so giving row mouthful to first pressure chamber's supply pressure fluid via first, and give row mouthful when the second pressure chamber supply pressure fluid via second, all can be suppressed at the torque that produces swaying direction on pincers body and the brake pressure cylinder device.Therefore, brake shoe is to the bias voltage of dish in the time of can suppressing the emergency of pressure fluid, and the eccentric wear that suppresses brake shoe decreases.
The brake tongs device of the 11 invention is on the basis of the brake tongs device of the 9th invention, it is characterized in that, the brake pressure cylinder device that this brake tongs device had has air funnel and filter, this air funnel is as the elastomer of tubular and form, and the periphery an end is provided with helical thread portion, be installed to described cylinder body at this helical thread portion by the screw thread combination, and internal communication with described cylinder body, this filter deployment is in the inboard of described air funnel and be positioned at the corresponding position of part with the described helical thread portion of formation of this air funnel, and is formed by rigid body.
According to this invention, the helical thread portion of air funnel in its end that only will be equipped with filter combines with cylinder body screw thread, can when air funnel is installed filter be installed also.In addition, because of filter is equipped on the inside of air funnel, so do not need to be used to install the parts etc. of the special use of filter.Therefore, air funnel the cylinder body can be installed to easily and promptly with filter, the simplification of filter installation exercise can be sought.
The brake tongs device of the 12 invention is on the basis of the brake tongs device of the 9th invention, it is characterized in that, it is one distolateral by this brake tongs device had a pair of brake lever that described brake pressure cylinder device drives that described pincers body has, and it is distolateral and keep a pair of brake shoe holding part of described brake shoe and in the outstanding foot that is provided with of lower end side of described brake shoe holding part also to possess another that be installed in described a pair of brake lever respectively.
According to this invention, when pulling down for maintenance operation of carrying out brake tongs device etc. and with this brake tongs device and being placed on the ground etc., by suitably setting the size of foot in advance, can utilize pincers body one distolateral end portion and foot that brake tongs device is placed to horizontal state.Therefore, can easily carry out maintenance operation, and can improve operating efficiency.
The brake tongs device of the 13 invention is on the basis of the brake tongs device of the 9th invention, it is characterized in that, described pincers body has a distolateral a pair of brake lever that is driven by the described brake pressure cylinder device that this brake tongs device had, it is distolateral and keep a pair of brake shoe holding part of described brake shoe also to possess another that be installed in described a pair of brake lever respectively, with the brake shoe installation component that is used on described brake shoe holding part, installing described brake shoe, described brake shoe holding part is provided with keyway, the key portion that is formed on the removable described brake shoe carries in this keyway from vertical lower, described brake shoe installation component has latch, bayonet lock and coupling chain, this latch is supported on the below of described brake shoe holding part swingably, on described axial direction, applied active force by spring, end with described key portion card and support described brake shoe, this bayonet lock limits the swing of the direction that described latch opens to the card anti-avulsion of described brake shoe and described latch by the bottom of inserting described brake shoe holding part, and this coupling chain links described latch and described bayonet lock.
According to this invention, utilize by spring (for example leaf spring) and apply latch with the active force of the loading and unloading direction different direction of brake shoe, can realize the structure of installation or removal brake shoe easily.In addition, only, can prevent the disengagement that the latch card ends by bayonet lock being inserted the below of brake shoe holding part.That is, that is, when the replacing operation of brake slipper, extract bayonet lock, remove the effect that prevents that the card anti-avulsion of latch is opened, be ready to falling of brake slipper, under above-mentioned state, rotate, can pull down brake slipper effectively by the effect that makes latch overcome leaf spring etc.In addition, when new brake slipper is installed, make slide in the keyway of key portion at backboard of brake slipper and reach set position during, latch is ended by card by leaf spring etc., thereby, also can easily install.By utilizing coupling chain to link latch and bayonet lock, also can realize preventing the structure that comes off and lose of bayonet lock simply.
Therefore, brake tongs device as described below can be provided, this brake tongs device can not cause the accident of brake slipper to fall, can realize can be freely only the supporting of brake off piece, be easy to brake slipper and change operation, in addition, about the installation exercise of brake slipper, do not need to utilize the complexity such as locking of bundle binding carrying out bolt yet and require the operation of proficiency.
Description of drawings
The following explanation that other purposes of the present invention, feature and advantage will be carried out in conjunction with the drawings and become more clear, wherein,
Fig. 1 is a skeleton diagram of seeing the brake tongs device that the rail truck of embodiment of the present invention is used from axial direction.
Fig. 2 is a skeleton diagram of seeing the brake tongs device shown in Fig. 1 with the direct of travel of vehicle abreast from the brake pressure cylinder device side.
Fig. 3 is a skeleton diagram of seeing the brake tongs device shown in Fig. 1 from downside.
Fig. 4 is the stereogram of the brake slipper in the brake tongs device shown in Figure 1.
Fig. 5 is plan view and its A-A line direction sectional view of expression brake slipper shown in Figure 4.
Fig. 6 is the sectional view of the brake pressure cylinder device in the brake tongs device shown in Figure 1.
Fig. 7 is the figure that comprises a part of section of partition wall, outer cylinder member and the guide element of expression brake tongs device shown in Figure 6.
Fig. 8 is the figure of the manual cancel system in the expression brake tongs device shown in Figure 6.
Fig. 9 is that expression is with respect to the axle center in the section of brake pressure cylinder device shown in Figure 6, the sectional view of a plurality of sections that only half section is different.
Figure 10 amplifies air funnel in the expression brake pressure cylinder device shown in Figure 9 and near sectional view thereof.
Figure 11 is plan view and the side view that expression is disposed at the filter in the air funnel.
Embodiment
Below, implement preferred forms of the present invention with reference to description of drawings.In addition, about the brake pressure cylinder device of embodiments of the present invention and have the brake tongs device of this brake pressure cylinder device, situation about using with the arrestment mechanism of using as rail truck describes as example.The ratio of the constituting component of each accompanying drawing is drawn with the precision suitable with plan.
Fig. 1 is a skeleton diagram of seeing the brake tongs device 1 that the rail truck of embodiment of the present invention is used from axial direction.Fig. 2 is a skeleton diagram of seeing brake tongs device 1 in Fig. 1 with the direct of travel of vehicle abreast from brake pressure cylinder device 2 sides.Fig. 3 is a skeleton diagram of seeing brake tongs device 1 in Fig. 1 from downside.As Fig. 1～shown in Figure 3, the brake tongs device 1 of present embodiment is the arrestment mechanism of dish braking type.
Fig. 1～brake tongs device 1 shown in Figure 3 has: brake pressure cylinder device 2; Equip this brake pressure cylinder device 2 and pincers body 11 can install in the mode that axial direction moves with respect to the chassis 100 of vehicle; The a pair of backboard (brake shoe holding part) 12,12 that keeps a pair of brake slipper (brake shoe) 14,14 respectively; Be used for installing respectively a pair of brake shoe installation component 13,13 of each brake slipper 14 with respect to a pair of backboard 12,12; Be equipped on the foot 18 of backboard 12 downsides; Be equipped on the parallel-guiding 23 of pincers body 11 bottoms.
Brake tongs device 1 is by making brake pressure cylinder device 2 actions, the a pair of brake slipper 14,14 that utilization is installed via backboard 12 with respect to pincers body 11, the rotation of the wheel of clamping and rail truck (not shown) interlock and dish rotation, the axletree side is discoideus brake disc 15, thus braking force produced.Promptly, brake disc 15 forms has the discoideus of the front and back braking surface 15a, the 15a that form with rotating shaft direct cross ground, by making brake pressure cylinder device 2 actions, brake slipper 14,14 is pushed and arrives on braking surface 15a, the 15a, so that from the direction of running shaft direction (the paper Vertical direction Fig. 1) almost parallel of brake disc 15 and from sandwich brake disc 15.
As Fig. 1～shown in Figure 3, pincers body 11 has bonded block 16 and a pair of brake lever 17,17.Bonded block 16 via rocking pin 16a can install around the mode of the rotation axis oscillating parallel with the direct of travel of vehicle with respect to the carriage 100a that is fixed on the chassis bottom surface.With respect to this bonded block 16 roughly symmetrically, be provided with a pair of brake lever 17,17 swingably via a pair of fulcrum pin 17a.This fulcrum pin 17a is arranged to extend to the axial vertical direction with respect to rocking pin 16a in plan view.
A pair of brake lever 17,17 is equipped with via cylinder rest pin 17b that brake pressure cylinder device 2, is distolateral to be driven by this brake pressure cylinder device 2 in that one is distolateral.In addition, a pair of brake lever 17,17 is one distolateral with respect to what brake pressure cylinder device 2 was installed, at another the distolateral a pair of backboard 12,12 that keeps brake slipper 14 that is separately installed with across fulcrum pin 17a.Backboard 12 is installed with respect to brake lever 17 swings freely via the rest pin 12a that extends abreast with fulcrum pin 17a.In addition, the lower end side at each backboard 12 is provided with the tab-like rectangular-shaped foot 18 that becomes.About the outstanding length of foot 18, set corresponding to the lower end position of cylinder rest pin 17b and size, consider the end of foot 18 and the lower end of cylinder rest pin 17b are disposed in the face of approximate horizontal.Therefore, when carrying out maintenance operation etc., brake tongs device 1 is being pulled down and when being positioned over the ground etc. of level from chassis 100, end by making foot 18 and the lower end ground connection of cylinder rest pin 17b can flatly be placed brake tongs device 1.
Fig. 4 is the stereogram of brake slipper 14, and Fig. 5 is the plan view (Fig. 5 (a)) of expression brake slipper 14 and the figure of its A-A line direction sectional view (Fig. 5 (b)).As shown in Figure 3, Figure 4, brake slipper 14 forms roughly along the shape of the part of the circular arc of brake disc 15, is formed with the 14a of key portion at the opposition side with the face of brake disc 15 butts.In addition, as shown in Figure 3, on backboard 12, be provided with the keyway 12b that forms with the shape of the profile approximate match of the 14a of key portion, so that the 14a of key portion of removable brake slipper 14 carries in this keyway 12b from vertical lower.Thus, the 14a of key portion slip limit in limit in keyway 12b is chimeric, thereby brake slipper 14 is installed on the backboard 12.
As Fig. 1 and shown in Figure 3, the brake shoe installation component 13 that the brake slipper 14 that is used for being maintained under the chimeric state of the 14a of key portion and keyway 12b is installed on backboard 12 is located at the bottom of backboard 12.This brake shoe installation component 13 has: latch 19, bayonet lock 20, coupling chain 21 etc.
Latch 19 is to be disposed at flat-shaped part in the face vertical with brake disc 15, elongated, and below backboard 12, via not shown pin, one is distolateral to be propped up by axle swingably.In addition, as shown in Figure 3,, be formed with protuberance 19a,, can prevent that brake slipper 14 from falling the below by making the downside end face butt of this protuberance 19a and the 14a of key portion with the shape that roughly embeds keyway 12b at latch 19 and sidepieces brake slipper 14 opposite sides.In addition, if with another distolateral end 19b of latch 19 (to a side opposite with brake disc 15) pulling laterally, then the card of the 14a of key portion of the protuberance 19a of latch 19 and brake slipper 14 only is disengaged.This latch 19 is in a side identical with a side of being propped up by axle swingably, by being applied active force with the leaf spring 22 of cantilever-shaped supporting to axial direction by foot 18, thereby ends and supporting brake slipper 14 with the 14a of key portion card.
As Fig. 1 and shown in Figure 3, bayonet lock 20 following formation, that is, a thread-like member with rigidity is bent into the coiled type of a circle about half and forms after the spring section 20a, only one of this spring section 20a distolaterally be bent into wavy and form curved section 20b.In addition, another is distolateral bayonet lock 20, that do not form curved section 20b, is provided with straight section 20c.Bayonet lock 20 is inserted backboard 12 in the following manner, that is, this straight section 20c is inserted in the pin-and-hole of being located at backboard 12 bottoms, and curved section 20b similarly embeds the slot part of being located at backboard 12 bottoms.Like this, end under the state of brake slipper 14 at latch 19 cards, if bayonet lock 20 is inserted backboard 12, then latch 19 is positioned at the position that is sandwiched between curved section 20b and straight section 20c.Thus, bayonet lock 20 is inserted into the bottom of backboard 12, thereby the swing of the direction that the restriction latch is opened to the card anti-avulsion of brake slipper 14 and latch 19 can prevent that the card anti-avulsion of brake slipper 14 and latch 19 from opening.
Bayonet lock 20 is installed on the latch 19 by the coupling chain 21 that is provided with in the mode that links this bayonet lock 20 and latch 19.That is, an end of coupling chain 21 is fixed by a first-class mode in position that ties up to latch 19, and the other end is installed on the spring section 20a of bayonet lock 20.Bayonet lock 20 all needs to extract and insert when carrying out the replacing operation of brake slipper 14 at every turn, again because be widget and losing easily, and by having this coupling chain 21, can realize the function that prevents loss simply.This coupling chain 21 is for having flexible union body, even if so long as the fiber that long-term use also is difficult to cut off etc. gets final product, also can be steel wire or resin thread etc.
As Fig. 1, shown in Figure 3, parallel-guiding 23 has: a pair of guide element 24a, 24b and a pair of guide rod 25a, 25b.Guide element 24a, 24b have the part that is bent to form to コ word shape respectively, and one is distolateral fixing with respect to backboard 12.In addition, be fixed with the distolateral of guide rod 25a in that another of guide element 24a is distolateral, another of guide rod 25a is distolateral to be embedded in another the distolateral through hole that is formed at guide element 24b with loosening chimeric status.Similarly, another of guide element 24b be distolateral is fixing the distolateral of guide rod 25b, and another of guide rod 25b is distolateral to be embedded in another the distolateral through hole that is formed at guide element 24a with loosening chimeric status.In addition, guide rod 25a and guide rod 25b dispose abreast.By the parallel-guiding 23 that constitutes by aforesaid a pair of guide element 24a, 24b and guide rod 25a, 25b, brake pressure cylinder device 2 action, brake lever 17 swings and with backboard 12 when the close direction (with the direction of brake disc 15 butts) of a pair of brake slipper 14,14 is mobile, thereby a pair of brake slipper 14,14 is directed carrying out the roughly action of symmetry across brake disc 15.
In above-mentioned brake tongs device 1, as described later, cylinder body 26 sides of brake pressure cylinder device 2 are installed on a brake lever 17, on another brake lever 17, push rod 28 is installed.By the action of brake pressure cylinder device 2, carry out the outstanding of push rod 28 or return action.Thus, near the cylinder rest pin 17b of a pair of brake lever 17,17 part be separated from each other or mutually close mode be driven.Therefore, a pair of brake lever 17,17 is that fulcrum moves with fulcrum pin 17a, thereby by brake slipper 14 clamping brake discs 15.In addition, this moment, the brake slipper 14 of being located at a brake lever 17 contacted with the braking surface 15a of brake disc 15 earlier in a pair of brake lever 17,17.Then, another brake lever 17 utilizes the counter-force of bearing from the brake slipper 14 that contacts with braking surface 15a, brake slipper 14 is pushed against on the braking surface 15a of brake disc 15.Thus, by a pair of brake slipper 14,14 clamping brake discs 15, the frictional force that utilization produces between brake slipper 14,14 and braking surface 15a, 15a, the rotation of brake disc 15 is braked, and the rotation of the wheel of the rail truck that is provided with coaxially with brake disc 15 is braked.
Then, explain the brake pressure cylinder device 2 of present embodiment.Two end part on the braking maneuver direction of brake pressure cylinder device 2 link with cylinder rest pin 17b respectively.In addition, shown in the sectional view of brake pressure cylinder device 2 as shown in Figure 6, brake pressure cylinder device 2 has: cylinder body 26, service braking mechanism 27, push rod 28, spring braking mechanism 29, outstanding length adjusting mechanism 30.
Cylinder body 26 is made of first housing section 31 and first housing section 32, and forms inner space 26a.In the 26a of this inner space, taking in part or all of each constituting component such as service braking mechanism 27, push rod 28, spring braking mechanism 29, outstanding length adjusting mechanism 30.In addition, first housing section 31 is for there being roughly cup-shaped (the cylinder shape) at the end, second housing section 32 by bolt to seal the open side of this first housing section 31.Form inner space 26a therefrom.In addition, the end of first housing section 31 utilizes cylinder rest pin 17b and brake lever 17 to link.
Service braking mechanism 27 has first spring 34, first pressure chamber 35, first piston 36 as main structure.First piston 36 disposes in the mode of separating inner space 26a, and is chimeric airtightly with the inner peripheral surface of first housing section 31, and, can set slidably in the axial direction with respect to first housing section 31.Utilization constitutes first pressure chamber 35 by the space that these first pistons 36 and first housing section 31 are separated out.For the tightness that makes this first pressure chamber 35 improves, on first piston 36, be coated with a bowl type Sealing 38.In addition, be provided with the first pressure fluid path 37 that is communicated with first pressure chamber 35 on cylinder body 26, supplying with as the action fluid via this first pressure fluid path 37 to first pressure chamber 35 is the pressurized air of pressure fluid.In addition, an outside opening and the row of giving compressed-air actuated first row of the giving mouthful 37a to cylinder body 26 is configured to from the first pressure fluid path 37, is positioned at vertical lower with respect to rocking pin 16a (with reference to Fig. 1, Fig. 2).
In addition, first spring 34 is disposed at opposition side with respect to first pressure chamber 35 across first piston 36 in the 26a of inner space, towards first pressure chamber, 35 sides the mode that first piston 36 applies active force is set.According to such structure, service braking mechanism 27 following actions, promptly, the active force of first spring 34 and from the pressure in contrast direction of first pressure chamber 35 act on first piston 36, by supplying with the active force that pressurized air overcomes first spring 34 to first pressure chamber 35, first piston 36 relatively moves with respect to cylinder body 26 and moves to braking direction (the arrow A direction among Fig. 6).
Push rod 28 forms has the cylindric of axis hole that the movement direction with first piston 36 extends abreast, and near ends inner peripheral surface, first pressure chamber, 35 sides of this axis hole, screw thread is processed with internal thread 39.In addition, have male and fomale(M﹠F) 40 at the outer circumferential face of push rod 28, this male and fomale(M﹠F) 40 is by arranging concavo-convex formation repeatedly on the movement direction of this push rod 28.The concavo-convex difference of height of male and fomale(M﹠F) 40 for example is 0.3 millimeter, and this male and fomale(M﹠F) 40 constitutes the part of the structure of outstanding length adjusting mechanism 30.In addition,, link the cylinder rest pin 17b that brake lever 17 is arranged, the driving force that is produced by brake pressure cylinder device 2 can be transmitted with respect to the brake lever 17 that clamps body 11 via linking parts 41 at the front end of push rod 28.It is fixing by pin etc. in order to limit relative pivoting to link parts 41 and push rod 28.In addition, between the push rod 28 and second housing section 32 for dustproof and be provided with flexible wrinkle safety cover 46, with covering be formed at this second housing section 32, with the opening portion of the end of first housing section, 31 opposition sides.As described later, push rod 28 is arranged to, and can move with first piston 36 via outstanding length adjusting mechanism 30.
Spring braking mechanism 29 has second spring 42, second pressure chamber 43, second piston 44 as main structure.Second piston 44 has: the barrel 44a that constitutes as cylinder, the flange shape part 44b, the 44c that are provided with projectedly laterally respectively at the two ends of barrel 44a, be equipped on the cartridge 44d of barrel 44a inboard etc., push rod 28 disposes in the mode that connects barrel 44a inside.In addition, flange shape part 44b constitutes and is disposed at the forward end of push rod 28 by a plurality of parts, and flange shape part 44c is disposed at first piston 36 sides.Cartridge 44d utilizes described later fixing with ring 67 that barrel 44a and flange shape part 44b, 44c is integrated usually.In addition, stretch out with the edge shape to the inside in week on second housing section 32, being provided with and constitute the 32a of spring seat portion of the pedestal of second spring 42 along it.The periphery sliding contact airtightly of the interior all ends of the 32a of this spring seat portion and the barrel 44a of second piston 44, second piston 44 can set in the axial direction slidably with respect to second housing section 32.
Second pressure chamber 43 is by being constituted by the periphery of the barrel 44a of second piston 44 and flange shape part 44c, the interior week of second housing section 32 and the space that the 32a of spring seat portion is separated out.Be provided with the second pressure fluid path 45 that is communicated with second pressure chamber 43 on second housing section 32, via this second pressure fluid path 45, pressurized air (pressure fluid) is fed in second pressure chamber 43.In addition, an outside opening and the row of giving compressed-air actuated second row of the giving mouthful 45a to cylinder body 26 is configured to from the second pressure fluid path 45, is positioned at vertical lower with respect to rocking pin 16a (with reference to Fig. 1, Fig. 2).
In addition, second spring 42 is provided with as the helical spring around the barrel 44a that is disposed at second piston 44, and is disposed between 32a of spring seat portion and the flange shape part 44b.Like this, second spring 42 is adapted to, and with respect to the 32a of spring seat portion flange shape part 44b (that is, with respect to 26 pairs second pistons 44 of cylinder body) is applied active force to braking direction (arrow A direction among the figure).Therefore, spring braking mechanism 29 following actions, promptly, the active force of second spring 42 and act on second piston in reverse direction from the pressure of second pressure chamber 43, forward the state that is discharged to by the state that is fed into second pressure chamber 43 from pressurized air, utilize the active force of second spring 42, second piston 44 moves to braking direction.In addition, spring braking mechanism 29 applies active force via 27 pairs of push rods 28 of service braking mechanism at second piston 44 as described later when braking direction moves.
Outstanding length adjusting mechanism 30 has: outer cylinder member 47, axostylus axostyle 48, guide element 49, aforesaid male and fomale(M﹠F) 40, O type ring (elastic member) 50, recess 51, partition wall (limting mechanism) 52 etc.Be somebody's turn to do outstanding length adjusting mechanism 30 and be provided with as following mechanism, that is, when carrying out braking maneuver, the outstanding length that the push rod 28 when adjusting the braking releasing is given prominence to from cylinder body 26 on the movement direction of first piston 36.
Outer cylinder member 47 forms cylindric, and its base end part is fixedly set in first piston 36 via flange plate 53 and bolt 54, moves with first piston 36.Head flange 55 has been taken in cardinal extremity inside in this outer cylinder member 47.On the inner peripheral surface of the axle head of outer cylinder member 47, be formed with the diameter reducing part 56 of taper, utilize this diameter reducing part 56, the radial outer edge of head flange 55 distolateral forward (advance side of push rod 28) can be promoted.In addition, on outer cylinder member 47, be provided with pushing pin 57 to the inside highlightedly, the front end of this pushing pin 57 can promote head flange 55 to terminal side (the yielding side of push rod 28).
Outer cylinder member 47 is equipped between the guide element 49 and second piston 44 of configuration around the push rod 28, and, at internal configurations guide element 49.In addition, outer cylinder member 47 is equipped with back-up ring 58 in the periphery of its forward end, ends via the interior perimembranous and outer cylinder member 47 cards of the forward end of the cartridge 44d of these back-up ring 58, the second pistons 44.Thus, if after making the 27 temporary transient actions of service braking mechanism, make 29 actions of spring braking mechanism, then at second piston 44 when braking direction moves, because this second piston 44 ends via back-up ring 58 and outer cylinder member 47 cards, so will apply active force via 36 pairs of push rods 28 of first piston of outer cylinder member 47 and service braking mechanism 27.
Axostylus axostyle 48 screw thread on outer circumferential face is processed with outside thread 59, and state setting to combine with near internal thread 39 screw threads of screw thread ends on the inner peripheral surface of push rod 28, first pressure chamber, 35 sides processing, be inserted in the axis hole of push rod 28 by the screw thread combination, and this axostylus axostyle 48 is installed push rods 28 relatively.In addition, base end part this axostylus axostyle 48, that be positioned at first pressure chamber, 35 sides is fixedly set in head flange 55, and axostylus axostyle 48 moves with piston 36.
Guide element 49 forms cylindric, is rotatably freely supported on the outside of axostylus axostyle 48 via thrust-bearing (bearing) 60.In addition, between this guide element 49 and head flange 55, force application spring 63 is installed.This guide element 49 has and is used to make push rod 28 to insert logical stair-stepping axis holes, and, this axis hole, form large diameter position, be formed with the O type ring containing space 49a that the space that male and fomale(M﹠F) 40 sides are opened wide promptly disposes O type ring 50.That is, this O type ring containing space 49a be formed at guide element 49 hole, big footpath bottom (end difference) 49b and be entrenched between the back-up ring 61 of opening end in this hole, big footpath, and make inboard (in the face of a side of the male and fomale(M﹠F) 40 of push rod 28) opening.
O type ring 50 is disposed among the O type ring containing space 49a between push rod 28 and the guide element 49.In addition, in this O type ring containing space 49a, a plurality of (four) O type ring 50 is configuration abreast in the axial direction, disposes supporting ring 62 at the two ends of each O type ring 50 (50 on adjacent O type ring).The bottom 49b in the hole, big footpath of guide element 49 and the position of back-up ring 61 basis are set with the relation of the width of O type ring 50, make that between bottom 49b and back-up ring 61 O type ring 50 presents in the axial direction a little by crowded flat resiliently deformable.Thus, the ground distortion of expanding of the inside all sides of O type ring 50 is by engage guide element 49 and push rod 28 bindings with the male and fomale(M﹠F) 40 of the outer circumferential face of push rod 28.Like this, guide element 49 is installed on push rod 28 as follows, that is, can move with push rod 28, and when the movement direction of push rod 28 and first piston 36 relatively moves abreast, act on set resistance.In addition, if guide element 49 is acted on the both power more than the sizing, then O type ring 50 is crossed the projection of male and fomale(M﹠F) 40 because of distortion, thereby, push rod 28 relative guide element 49 displacements.In the present embodiment, as elastic member, although understand to use be easy to obtain, dimensional accuracy is approximately 5 millimeter than higher, diameter and has the example of the O type ring of circular section, but also can be section shape and be the parts of main material with the rubber elastomeric material with ellipse or rectangle.
Fig. 7 is the figure of expression partition wall 52, outer cylinder member 47 and the guide element 49 seen from the B-B line direction of Fig. 6, and outer cylinder member 47 and guide element 49 use sections to represent.As Figure 6 and Figure 7, recess 51 be recessed to form as ground, perisporium top at guide element 49 and at circumferencial direction and the groove shape that extends axially shortly partly be provided with, be located at a plurality of positions (two positions) of guide element 49.
In addition, as Figure 6 and Figure 7, partition wall 52 is equipped between second piston 44 and first spring 34, is provided with to separate zone that is equipped with service braking mechanism 27 and the mode that is equipped with the zone of spring braking mechanism 29 in cylinder body 26.Partition wall 52 has the engagement portion 64 that engages with the recess 51 of being located at guide element 49, by with this engagement portion 64 and recess 51 guide element 49 axially on engaging, and the movable range (stroke) of restriction guide element 49 on the movement direction of first piston 36.In addition, by engagement portion 64 and recess 51 are engaged on the circumferencial direction of guide element 49, also can limit guide element 49 is the movable range (can seek spline) that rotates on the axial sense of rotation at the movement direction with first piston 36.Engagement portion 64 and each recess 51 are located at a plurality of positions (two positions) of partition wall 52 respectively accordingly.Position corresponding with recess 51 in outer cylinder member 47 is respectively equipped with opening, and engagement portion 64 connects these openings and engages with recess 51.
In addition, partition wall 52 heart therein partly is formed with the opening portion 65 that connects for guide element 49, and the edge section of this opening portion 65 is located in engagement portion 64.The size of this opening portion 65 forms, between the edge section of external diameter of guide element 49 (with the external diameter of the axial vertical section of guide element 49) and opening portion 65, can on whole circumference, there be the gap, so that in assembling during brake pressure cylinder device 2, can in opening portion 65, connect guide element 49 and recess 51 is engaged with engagement portion 64.In addition, as shown in Figure 7, in brake pressure cylinder device 2, partition wall 52 and guide element 49 are adapted to, with respect to the radial center position of the opening portion 65 of partition wall 52, the radial center position off-centre of guide element 49.
In spring braking mechanism 29, be provided with the manual cancel system 66 that is used for manual brake off operating state.This manual cancel system 66 has: fixing with ring 67, closing feature 68, fixing rod 69, Returnning spring 70, operation ring 71.Fig. 8 is this manual cancel system 66 of expression and is disposed at its fixing sectional view with the constituting component of encircling 67 inboards.In addition, it is corresponding with the section of Fig. 6 that the C line direction among Fig. 8 is looked section, in Fig. 8, fixing rod 69, Returnning spring 70 and operation compared size with each constituting component of ring 71 with other constituting components represent large.
As Fig. 7, shown in Figure 8, fix with ring 67 forming as the C type ring of being with slit, across the relative two end part of this slit portion, be provided with head 67a, the 67a of outer surface with wedge-like.Should the fixing flange shape part 44b that clamps and be disposed at second piston 44 with ring 67.In addition, fixing be subjected to from the active force of closing feature 68 and fixing rod 69 and diameter shrinks with ring 67 as described later, engage with this annular slot 72 by being embedded in the annular slot 72 that is formed at cartridge 44d periphery.Like this, engage with annular slot 72 by fixing with ring 67, the miscellaneous part in the cartridge 44d of second piston 44 and second piston 44 is fixed and is constituted one.
Closing feature 68 has the section of the コ word shape of opening, and side is formed with two inclined-planes with the outer surface butt of the wedge-like of fixing head 67a, 67a with ring 67 within it.This closing feature 68 is adapted to, and is directed along set groove in second piston 44, thereby can directly upwards moves at it with ring 67 with respect to fixing.In addition, fixing rod 69 constitute forward end be formed with wedge-like conical surface 69a, the ladder shaft like parts, be adapted in second piston 44 and can move forward and backward.Returnning spring 70 is provided with as the helical spring around the minor diameter part that is equipped on cascade fixing rod 69, is disposed between the end difference and spring seat 73 of fixing rod 69.By setting Returnning spring 70 like this, fixing rod 69 is applied active force by this Returnning spring 70, the outside that the conical surface 69a of fixing rod 69 forward end crosses closing feature 68, and fixing rod 69 is pushed closing feature 68 to fixing radial center side with ring 67.By pushing closing feature 68 like this, fixing with ring 67 maintenance reduced states, in second piston 44, keep cartridge 44d incorporate state in second piston 44.
In addition, operation with ring 71 be installed on fixing rod 69, and the end of conical surface 65a opposition side.To operate with encircling 71 to the direction pull operation of leaving from spring seat 73 by the active force that overcomes Returnning spring 70, the pressed state of the closing feature of realizing by means of the fixing rod 69 of pushing closing feature 68 under the state that is pressed onto on the closing feature 68 68 is disengaged at leisure.Be accompanied by this releasing action, the conical surface 69a sliding contact of closing feature 68 and fixing rod 69 can be moved to fixing radial outside with ring 67 simultaneously.Thus, fixing with ring 67 enlarged-diameter, and by the outer surface of the wedge-like of fixing the head 67a, the 67a that use ring 67, closing feature 68 is applied active force to fixing with the radial outside that encircles 67, and the engaging of fixing with ring 67 and annular slot 72 is disengaged.If fixing engaging with ring 67 and annular slot 72 is disengaged, then in second piston 44, the connecting state of cartridge 44d and miscellaneous part separated (incorporate state is disengaged), the part in second piston 44 except that cartridge 44d can be independent of cartridge 44d and move.Therefore, by operate the pull operation with ring 71 under the state of spring braking mechanism 29 actions, can form following state, promptly the active force that is produced by second spring 42 can not act on push rod 28 via second piston 44.Promptly, if operate pull operation with ring 71, even if then 42 pairs second pistons of second spring 44 apply active force to braking direction, also can make push rod 28 remove direction to braking and move, manually the brake off state with the cartridge 44d that is limited to back-up ring 58, outer cylinder member 47, axostylus axostyle 48 and first piston 36.
In addition, in brake pressure cylinder device 2, be provided with the inside and outside air funnel 75 that is communicated with cylinder body 26.Fig. 9 only represent relative brake pressure cylinder device 2 section the axle center half section.In Fig. 9, dotted line D is represented different sections as boundary, corresponding with the section of Fig. 6 by the zone that arrow D1 represents, the zone of being represented by arrow D2 is corresponding to the section different with Fig. 6.In addition, Figure 10 amplifies expression air funnel 75 and near sectional view thereof.
Air funnel 75 as tubular elastomer with curved section, be the tube of rubber system and forming, as Fig. 9 and shown in Figure 10, via ventilating part 76, the spring housing 74 (by the flange shape part 44b and the barrel 44a area surrounded of the inner circle wall of second housing section 32, spring seat 32a, second piston 44) and the external communications of second spring 42 in the spring braking mechanism 29 will be equipped with.In addition, as shown in figure 10, the periphery in an end of air funnel 75 is provided with the helical thread portion 75a that forms as outside thread, and this helical thread portion 75a combines with female thread portion 77 screw threads that are formed at second housing section 32.That is, air funnel 75 at helical thread portion 75a by screw thread in conjunction with being installed on the cylinder body 26, and with the internal communication of cylinder body 26.
In addition, the installed inside at air funnel 75 has Fig. 9 and filter 78 shown in Figure 10.Figure 11 is plan view (Figure 11 (a)) and a side view (Figure 11 (b)) of only representing filter 78.As shown in figure 11, filter 78 has circular wire section 78a and is installed on this wire section 78a 78b of frame portion on every side.These wire section 78a and the 78b of frame portion are as the rigid body of steel and form.As Fig. 9 and shown in Figure 10, this filter 78 is disposed at the inboard of air funnel 75 and is positioned on the corresponding position of the part that is formed with helical thread portion 75a with air funnel 75.
Next the action of brake pressure cylinder device 2 is described.Fig. 6 represents non-braking state, the state that expression service braking mechanism 27 and spring braking mechanism 29 all do not move.In addition, under non-braking state shown in Figure 6, for spring braking mechanism 29 is made as non-action status, pressurized air is supplied with and is kept following state to second pressure chamber 43 from second row of the giving mouthful 45a: overcome second spring 42 active force and to second piston 44 to figure arrow A side in the opposite direction the moving direction (opposite direction of braking direction is the direction of brake off) of i.e. counter apply active force.
From non-braking state shown in Figure 6, if control set valve (not shown) pressurized air is supplied to first to a row mouthful 37a, then first piston 36 overcomes the effect of first spring 34 and is pushed to braking direction (the arrow A direction among Fig. 6), and the outer cylinder member 47 that is fixed in first piston 36 also moves to braking direction.Like this, push the outward edge of head flange 55 because of the diameter reducing part 56 of the inner peripheral surface of the base end part that is formed at outer cylinder member 47, so head flange 55 also moves to braking direction, the push rod 28 that links with axostylus axostyle 48 also moves to the arrow A direction.In addition, this moment, head flange 55 or axostylus axostyle 48 did not rotate, and were only pushed by outer cylinder member 47.Like this, 27 actions of service braking mechanism, push rod 28 (along with outer cylinder member 47 and guide element 49) is pushed to braking direction and is advanced, thus brake tongs device 1 action.
As mentioned above, the braking force that produces in service braking mechanism 27 works and makes vehicle when the state former state that stops to forward vehicle stop state to, under the state of above-mentioned service braking mechanism 27 actions, set valve (not shown) is controlled, and the pressurized air that is enclosed in second pressure chamber 43 is discharged from second row of the giving mouthful 45a.Thus, the effect of second pressure chamber 43 that produces against the active force of second spring 42 is disengaged, by the active force of second spring 42, and 44 elongations of second piston, the cartridge 44d of second piston 44 and back-up ring 58 butts, thus second piston 44 and outer cylinder member 47 cards state only become.Under this state, even if service braking mechanism 27 is disengaged, promptly, thereby be discharged from first piston 36 and move to the moving direction of counter even if supply to the pressurized air of first pressure chamber 35, thereby also can keep push rod 28 is applied active force performance braking force by spring braking mechanism 29 state by first spring 34.In addition, when manually removing the action of spring braking mechanism 29, as previously mentioned, fixing of cartridge 44d in second piston 44 removed in the operation of operating manual cancel system 66 with ring 71.
Kept non-action status, only made service braking mechanism 27 actions and making under the state of braking force effect in spring braking mechanism 29, if set valve (not shown) is controlled, the pressurized air that supplies to first pressure chamber 35 by first row of the giving mouthful 37a is discharged from, then by the effect of first spring 34, first piston 36 is pushed to the moving direction of counter, and outer cylinder member 47 also is pulled to the moving direction of counter.Thus, head flange 55 is pushed untie-sell 57 and pushes, and axostylus axostyle 48 reaches the push rod 28 that links with this axostylus axostyle 48 and also is pulled and makes a concession to the moving direction of counter.Like this, turn back to non-braking state shown in Figure 6.
On the other hand, if the wearing and tearing of the braking surface of brake slipper 14, make then that the braking force effect is needed, the stroke of push rod 28 increases, the stroke of the guide element 49 that combines with push rod 28 via O type ring 50 also increases.If the trip surpasses the stroke by engagement portion 64 restrictions of the recess 51 of being located at guide element 49 and partition wall 52, then because of engagement portion 64 is fastened on recess 51, so guide element 49 is applied big return force.Therefore, after engagement portion 64 and recess 51 engagings, O type ring 50 is out of shape and crosses the protuberance of male and fomale(M﹠F) 40, so push rod 28 relative guide elements 49 produce on direction of advance and the suitable skew (displacement) of further stroke of push rod 28.Promptly, by first piston 36 to the moving of projected direction (braking direction), engagement portion 64 and recess 51 engagings, and by first piston 36 is further moved to projected direction (braking direction), only remaining guide element 49, axostylus axostyle 48 and push rod 28 etc. are then to the projected direction displacement.In addition, because of the brake pads wear amount of usually each braking maneuver is very little, so push rod 28 each displacement amounts also are the little value suitable at interval to each other with the protuberance of male and fomale(M﹠F) 40.
In addition, after push rod 28 and guide element 49 generation relative displacements, if remove the braking of service braking mechanism 27 from first row of giving mouthful 37a discharge pressurized air, then first piston 36 returns to the moving direction of counter by first spring 34, utilization is installed on by the pushing pin 57 on the outer cylinder member 47 of its pulling, and head flange 55 is pushed to the moving direction of counter.Like this, head flange 55 becomes axostylus axostyle 48 by the state of drawing from push rod 28 with axostylus axostyle 48 rotations of being held 60 swivel bearings by thrust axis, and push rod 28 is absorbed because of screw thread moves with respect to the displacement of guide element 49 on direction of advance.Consequently, push rod 28 forward direction are outstanding measures accordingly with above-mentioned skew.Like this, the outstanding length of push rod 28 is adjusted, from begin and can make brake pressure cylinder device 2 actions with push rod 28 common strokes next time.
As described above described, brake pressure cylinder device 2 according to present embodiment, the push rods 28 that move with the first piston 36 of service braking mechanism 27 connect second piston 44 of spring braking mechanisms 29, between the guide element 49 of this push rod 28 and outstanding length adjusting mechanism 30, act on set resistance.Therefore, in brake pressure cylinder device 2, can prevent complicated or hugeization of locking mechanism and form compactly with service braking mechanism 27, spring braking mechanism 29 and length adjusting mechanism 30.In addition, in outstanding length adjusting mechanism 30, has limting mechanism 52, this limting mechanism 52 is equipped between second piston 44 and first spring 34 and has the engagement portion 64 that engages with the recess 51 of being located at guide element 49, is made of the simple structure of movable range of restriction guide element 49.Therefore, can by simple mechanism limit the outstanding length of push rod 28 adjustable range and can not adjustment range.
Thus, a kind of like this brake pressure cylinder device 2 can be provided, according to brake pressure cylinder device 2, regulating mechanism 30 with service braking mechanism 27, spring braking mechanism 29 and push rod 28 outstanding length, complicated, hugeization that can suppress mechanism, adjustable range that can be by simple mechanics limit push rod 28 outstanding length and mechanism that can not adjustment range.
In addition,, utilize recess 51 and limting mechanism 52, can realize the rotation stopping function of guide element 49 with the engagement portion 64 that engages with this recess 51 according to brake pressure cylinder device 2.Therefore, can utilize a limting mechanism 52 to realize limiting the function and the rotation stopping function of the movable range of guide element 49 on first piston 36 movement directions, can form simple mechanism.
In addition, many to corresponding concave part 51 and engagement portion 64 according to brake pressure cylinder device 2 by being provided with, can bear load dispersedly in the snap portions effect, can be reduced in the wearing and tearing that recess 51 or engagement portion 64 produce, durability is improved.
According to brake pressure cylinder device 2, because of the partition wall 52 of limting mechanism 52 as the zone of zone of separating service braking mechanism 27 and spring braking mechanism 29 is provided with, so limting mechanism 52 can be formed thin planar and can form simple structure.Therefore, in brake pressure cylinder device 2, but the simple limting mechanism 52 of space availability ratio highland collocating structure.In addition, when assembling brake pressure cylinder device 2, can in the opening portion 65 of partition wall 52, make guide element 49 connect and not make recess 51 and engagement portion 64 to engage,, can improve the efficient of assembling operation so can easily carry out assembling operation via set gap.
According to brake pressure cylinder device 2, by the center off-centre of the relative opening portion 65 in the center that makes guide element 49, can easily be achieved as follows described structure: can in the opening portion 65 of partition wall 52, make guide element 49 connect and not make recess 51 and engagement portion 64 to engage via set gap by simple structure.
According to brake pressure cylinder device 2, in outstanding length adjusting mechanism 30, elastic member 50 is distortion and engage the form of (nipping), so the frictional force or the combination force of 49 of push rod 28 and guide elements are stablized.Thus, can easily give prominence to slip resistance adjustment and management in the length adjusting mechanism 30 by simple structure.
According to brake pressure cylinder device 2, push rod 28 is attached on the axostylus axostyle 48 that moves with first piston 36 by screw thread and installs, so can constitute, moves the outstanding length that absorbs push rod 28 by axostylus axostyle 48 relative to the screw thread of push rod 28.Therefore, even if under the state that the outstanding length of push rod 28 has been adjusted, can prevent also that first piston 36 relative cylinder bodies 26 from producing position deflections, can realize the volume of first pressure chamber 35 is roughly kept certain structure.
According to brake pressure cylinder device 2, the second pistons 44 by be disposed between the guide element 49 and second piston 44 and and outer cylinder member 47 cards that move of first piston 36 only, and can apply active force to push rod 28.Therefore, can just can be implemented in second piston 44 applies active force to push rod 28 via service braking mechanism when braking direction moves structure with the outer cylinder member 47 of simple shape formation by setting by simple mechanism.
In addition, brake tongs device 1 according to present embodiment, can realize having the brake tongs device 1 of brake pressure cylinder device 2, this brake pressure cylinder device 2 has the regulating mechanism 30 of service braking mechanism 27, spring braking mechanism 29 and push rod 28 outstanding length, complicated, hugeization that can suppress mechanism also can realize the adjustable range of restriction push rod 28 outstanding length and mechanism 52 that can not adjustment range by simple mechanism.
According to brake tongs device 1, first row of the giving mouthful 37a and second row of the giving mouthful 45a are positioned at the vertical lower of rocking pin 16a, so when giving row mouthful 37a to first pressure chamber, 35 supply pressure fluids via first, and give row mouthful 45a when second pressure chamber, the 43 supply pressure fluids via second, all can be suppressed at the torque that produces swaying direction on pincers body 11 and the brake pressure cylinder device 2.Therefore, brake slipper 14 is to the bias voltage of brake disc 15 in the time of can suppressing the state of emergency of pressure fluid, and the eccentric wear that can suppress brake slipper 14 decreases.
According to brake tongs device 1, only combine with cylinder body 26 screw threads by the helical thread portion 75a of air funnel 75 in its end that will be equipped with filter 78, filter 78 just when being installed, also is installed by air funnel 75 simultaneously.In addition, because of filter 78 is equipped on the inside of air funnel 75, so do not need to be used to install the parts etc. of the special use of filter 78.Therefore, air funnel 75 can be installed to cylinder body 26, the simplicity that can seek the filter installation exercise easily and promptly with filter 78.
According to brake tongs device 1, when pulling down for maintenance operation of carrying out brake tongs device 1 etc. and with brake tongs device 1 and being placed on the ground etc., by suitably setting the size of foot 18 in advance, can utilize pincers body 11 1 distolateral end portion and foots 18 that brake tongs device 1 is placed to horizontal state.Therefore, can easily carry out maintenance operation, can improve operating efficiency.
According to brake tongs device 1, utilize by leaf spring 22 and apply the latch 19 of active force to the direction different with the loading and unloading direction of brake slipper 14, can realize the structure of installation or removal brake slipper 14 easily.In addition, only the below by bayonet lock 20 is inserted backboard 12 can prevent that the card anti-avulsion of latch 19 from opening.That is, when the replacing operation of brake slipper 14, extract bayonet lock 20, remove the effect that prevents that the card anti-avulsion of latch 19 is opened, be ready to falling of brake slipper 14, under above-mentioned state, rotate, can pull down brake slipper 14 effectively by making latch 19 overcome leaf spring 22.In addition, when new brake slipper 14 is installed, make slide among the keyway 12b of the 14a of key portion at backboard 12 of brake slipper 14 and reach set position during, latch 19 is ended by card by leaf spring 22, thereby, also can easily install.By utilizing coupling chain 21 to link latch 19 and bayonet lock 20, also can realize preventing the structure that comes off and lose of bayonet lock 20 simply.Therefore, brake tongs device 1 as described below can be provided, this brake tongs device 1 can not cause the accident of brake slipper 14 to fall, can realize can be freely only the supporting of brake off piece 14, be easy to brake slipper and change operation, in addition, about the installation exercise of brake slipper 14, do not need to utilize bundle binding (bundling wire) to carry out the complexity such as locking of bolt yet and require the operation of proficiency.
More than, embodiments of the present invention have been described, but the present invention is not limited to above-mentioned mode of execution, in the scope of claim record, can carry out various changes and enforcement.For example, also can as described belowly be out of shape and implement.
In the present embodiment, for brake pressure cylinder device 2 as the driving source of brake tongs device 1, illustrated to use and utilized air pressure to carry out the example of driven air cylinder apparatus, but be not limited to this, also can use and utilize cylinder apparatus that oil pressure drives etc.
In addition, be not limited to form at the outer circumferential face of push rod 28 situation of male and fomale(M﹠F) 40, also can constitute, outer circumferential face is formed smooth state, push rod 28 is subjected to frictional force and applies set resistance from O type ring 50 elastic members such as grade.At this moment, process the outer circumferential face of push rod 28 easily, thereby can reduce processing cost.In addition, be not limited to arrange concavo-convex repeatedly and form the situation of male and fomale(M﹠F) 40, also can carry out surface treatment such as sandblast processing on the surface and adjust frictional force at the movement direction of this push rod 28 of the surperficial upper edge of push rod 28.
In addition, be not limited to link the situation of push rod 28 and guide element 49 via elastic member, also can link push rod and guide element by mechanical structure as described below, promptly, when push rod moves on the direction parallel with the movement direction of first piston relative to guide element, act on the structure of set resistance, for example, when driving has the gear mechanism of set rotational resistance, the structure that push rod moves relative to guide element etc.
As example the brake pressure cylinder device 2 of present embodiment has been described with situation about in the brake tongs device 1 of disc type brake type, using, but has been not limited to this example, can suitably use brake pressure cylinder device 2.Promptly, brake pressure cylinder device 2 is not limited to situation about using in the arrestment mechanism of formula pan brake type, the front end that also is used in push rod installs brake slipper, produce by the tread butt that makes this brake slipper and wheel in the arrestment mechanism of tread brake type of braking force.
In the present embodiment, illustrated by the recess 51 of being located at guide element 49 and limting mechanism 52 to constitute the example of outstanding length adjusting mechanism 30, but also can not use recess 51 and the use protuberance with the engagement portion 64 that engages with recess 51.That is, outstanding length adjusting mechanism also can constitute and have: be located at the protuberance of guide element 49 and have the limting mechanism of the engagement portion that engages with this protuberance.

Claims (9)

1. a brake pressure cylinder device uses in for motor vehicle arrestment mechanism, it is characterized in that possessing:
Service braking mechanism, have first spring, first pressure chamber and first piston, first spring is disposed at opposition side with respect to first pressure chamber across first piston, on this first piston, the active force of first spring and act on round about from the pressure of first pressure chamber, by to described first pressure chamber's supply pressure fluid, overcome the active force of described first spring, described first piston relatively moves with respect to the cylinder body and moves to braking direction;
Can be with the mobile push rod of described first piston;
Outstanding length adjusting mechanism, has guide element, this guide element with can with described push rod move and when the movement direction that described push rod is parallel to described first piston relatively moves the mode of the set resistance of effect be installed on described push rod, when braking maneuver, the outstanding length that described push rod was given prominence to from described cylinder body on the movement direction of described first piston when this outstanding length adjusting mechanism adjustment braking was removed;
And spring braking mechanism, have second spring, second pressure chamber and second piston, second spring be disposed at second piston around, on this second piston, the active force of second spring and act on round about from the pressure of second pressure chamber, and described push rod connects this second piston, by forward the state of discharging fluid to from state to described second pressure chamber's supply pressure fluid, active force by described second spring, described second piston moves to described braking direction, and via described service braking mechanism described push rod is applied active force;
Described outstanding length adjusting mechanism also has: recess or the protuberance of being located at described guide element; And limting mechanism, have the engagement portion that engages with described recess or protuberance, be equipped between described second piston and described first spring, and limit the movable range of described guide element on the movement direction of described first piston.
2. brake pressure cylinder device as claimed in claim 1, it is characterized in that, described limting mechanism engages with described recess or protuberance by making described engagement portion, also limits the movable range on the sense of rotation that described guide element is the center at the axle with described first piston.
3. brake pressure cylinder device as claimed in claim 1 or 2 is characterized in that, described recess or protuberance are located at a plurality of positions on the described guide element, and described engagement portion and described each recess or protuberance are located at a plurality of positions on the described limting mechanism respectively accordingly.
4. brake pressure cylinder device as claimed in claim 1 or 2 is characterized in that,
Described limting mechanism is provided with as partition wall, and this partition wall is separated the zone that sets described service braking mechanism and set the zone of described spring braking mechanism in described cylinder body,
At the core of described partition wall, be formed with the opening portion that connects for described guide element,
The edge section that forms described opening portion is located in described engagement portion,
The size of described opening portion forms, between the edge section of the external diameter of described guide element and this opening portion, can on whole circumference, there be the gap, so that in assembling during brake pressure cylinder device, can in this opening portion, connect described guide element and described recess or protuberance are engaged with described engagement portion.
5. brake pressure cylinder device as claimed in claim 4 is characterized in that, described partition wall and described guide element are configured to, with respect to the radial center position of described opening portion, and the radial center position off-centre of described guide element.
6. brake pressure cylinder device as claimed in claim 1 or 2 is characterized in that,
Described outstanding length adjusting mechanism also has: the movement direction of this push rod of the outer surface upper edge of described push rod arrange the concavo-convex and male and fomale(M﹠F) that forms repeatedly and be configured in described push rod and described guide element between elastic member,
Described elastic member engages with described male and fomale(M﹠F) by distortion, and described thus guide element and described push rod link, and,
If to the described guide element effect both power more than the sizing, then described elastic member distortion and cross the convex portion of described male and fomale(M﹠F), thus described push rod is with respect to described guide element displacement.
7. brake pressure cylinder device as claimed in claim 1 or 2 is characterized in that,
Described outstanding length adjusting mechanism also has the axostylus axostyle that moves and be equipped with described push rod with described first piston,
Described push rod forms has the cylindric of axis hole that the movement direction with described first piston extends abreast, and screw thread is processed with internal thread at least a portion of the internal surface of this axis hole,
Described axostylus axostyle screw thread at least a portion of outer surface is processed with the outside thread that combines with described internal thread screw thread, and screw thread is inserted in the described axis hole.
8. brake pressure cylinder device as claimed in claim 1 or 2, it is characterized in that, described outstanding length adjusting mechanism also has outer cylinder member, this outer cylinder member is equipped between the described guide element and described second piston of configuration around the described push rod, and this outer cylinder member is at the described guide element of internal configurations, and move with described first piston
When described braking direction moved, the card by this second piston and described outer cylinder member ended at described second piston in described spring braking mechanism, and via the described first piston of described outer cylinder member and described service braking mechanism described push rod was applied active force.
9. brake tongs device, the pincers body that possesses claim 1 or 2 described brake pressure cylinder devices and equip this brake pressure cylinder device and install in the mode that the chassis with respect to vehicle can relatively move on axial direction, by making this brake pressure cylinder device action, produce braking force by the dish of a pair of brake shoe clamping axletree side that is installed on this pincers body.
CN2008100917424A 2007-04-12 2008-04-14 Brake pressure cylinder device and brake tongs device Expired - Fee Related CN101285511B (en)

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JP2007104970A JP4809282B2 (en) 2007-04-12 2007-04-12 Brake cylinder device and brake caliper device
JP2007-104970 2007-04-12

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JP4809282B2 (en) 2011-11-09
CN101285511A (en) 2008-10-15

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