CN102756722B - Parking brake device for brake cylinder of railway vehicle - Google Patents
Parking brake device for brake cylinder of railway vehicle Download PDFInfo
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- CN102756722B CN102756722B CN201210253228.2A CN201210253228A CN102756722B CN 102756722 B CN102756722 B CN 102756722B CN 201210253228 A CN201210253228 A CN 201210253228A CN 102756722 B CN102756722 B CN 102756722B
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- parking brake
- push rod
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- parking
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Abstract
The invention provides a parking brake device for a brake cylinder of a railway vehicle. According to the parking brake device, in the case of needing operations of braking, resetting and manual brake releasing, a movable component parking brake ejection rod, a manual-released wedge pin, a rotary shaft, a guide block, a tension spring and a slide block in the parking brake device slide or rotate relative to one other, and other components such as a ratchet wheel, a ratchet tongue, a clutch and a screw nut are not needed, therefore, the parking brake device is compact in structure, small in size and light in mass. Additionally, a brake spring group serves as energy storage springs, the requirements on a machining process of the springs are low, and the machining cost is low. During the operation of the parking brake device, the rotation motions among the components are few, the structure is simple and convenient for extension, and the maintenance cost and the overhaul time are reduced.
Description
Technical field
This device relates to rail traffic vehicles control field, especially for the parking brake device of rail vehicle braking cylinder.
Background technology
Parking brake device is mainly used in making train or vehicle to stop for a long time in orbit.Parking brake device adopts spring stored energy more.In the time not needing to use parking brake function, pressurized air overcomes spring force compression spring, gives spring stored energy; After pressurized air is discharged, spring releases energy, and realizes parking brake function.
Spring energy-storage parking brake device General Requirements has the function of parking brake, parking brake alleviation, hand relieving.Applying and alleviating of parking brake be the discharge of pneumatically and be filled with, and when pressurized air is filled with, air does work to piston, the spring-compressed being connected with piston stored energy, and parking brake is alleviated.After pressurized air is discharged, spring capacity discharges, and vehicle is applied to parking brake.Parking brake is in the lock state while alleviation, operates hand relieving mechanism when applying after parking brake, and the locking relation between spring and force transferring part is disengaged, and cannot transmit braking force, and parking brake is alleviated.
In existing parking brake device, hand relieving mechanism relies on ratchet sour jujube tongue, power-transfer clutch and feed screw nut to complete locking and release task mostly, owing to participating in the large quality weight of volume of part of locking and release task, cause the parking brake whole unit volume of parking brake device larger.
In addition, for the spring for energy storage, existing design adopts single spring to realize spring energy-storage, and its tooling cost is high, complex process.Prior art is owing to having used feed screw nut to lock, and while unlocking, most of part is rotated, to having relatively high expectations of grease and bearing.From safeguarding angle, the parts of controlling locking in prior art are enclosed in parks cylinder interior, need to be to parking cylinder integral disassembly, assembly while maintenance.Maintenance difficulties is larger.
Summary of the invention
The object of this invention is to provide a kind of parking brake device for rail vehicle braking cylinder, in order to significantly to reduce parking brake device volume, expendable weight.
To achieve these goals, the invention provides a kind of parking brake device for rail vehicle braking cylinder, comprising: cylinder body; Cylinder cap, is connected to form enclosure space with cylinder body seal; Parking brake piston, is arranged in this enclosure space, periphery and inboard wall of cylinder block slipper seal; Upper end open park piston bush, be fixed on the interior week of parking brake piston, described in park piston bush and on inner peripheral surface, there is depressed part; With the parking brake push rod with an inner space, arrange through the central authorities of described parking brake piston, on described parking brake push rod, there is the hole corresponding with described depressed part, spheroid is arranged in this hole; Pin, by spring supporting on the bottom surface of the inner space of described parking brake push rod, relative with described spheroid, described pin has smaller diameter portion and larger diameter part on its longitudinal direction, wherein in the time that described larger diameter part contacts with described spheroid, thereby being partly pressed into, spheroid in described depressed part, will park piston bush and described pin locks together, in the time that described smaller diameter portion is relative with described spheroid, spheroid departs from described depressed part, thereby parks piston bush and described pin is disengaged locking.
Compared with prior art, the present invention has following advantages:
Parking brake device for rail vehicle braking cylinder provided by the invention, while needing braking, reset, hand to alleviate braking, movable part parking brake push rod in parking brake device, hand are alleviated between taper pin, rotating shaft, orienting lug, extension spring, slide block as sliding or rotating, do not need to adopt the parts such as ratchet of the prior art, sour jujube tongue, power-transfer clutch and feed screw nut, therefore compact conformation, the little quality of volume is light.
In addition, according to other aspects of the invention, the spring of energy storage adopts retarding spring group, less demanding to processing technology, and tooling cost is lower.Rotatablely moving when operation between parts is few, therefore, simple in structure and be convenient to expansion, reduces maintenance cost and repair time.
Brief description of the drawings
Shown in accompanying drawing, above-mentioned and other object of the present invention, Characteristics and advantages will be more clear.In whole accompanying drawings, identical Reference numeral is indicated identical part.Deliberately do not press actual size equal proportion convergent-divergent and draw accompanying drawing, focus on illustrating purport of the present invention.
Fig. 1 is the schematic diagram of state after parking brake device hand of the present invention is alleviated;
Fig. 2 and Fig. 3 are that parking brake device hand of the present invention is alleviated reseting procedure schematic diagram;
Fig. 4 is the schematic diagram that parking brake device parking brake of the present invention applies state;
Fig. 5 is the schematic diagram of parking brake device parking brake relieved state of the present invention;
Schematic diagram when Fig. 6 is parking brake device operation hand relieving of the present invention;
Fig. 7 and Fig. 8 are parking brake device of the present invention vertical section and cross sectional representation.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Secondly, the present invention is described in detail in conjunction with schematic diagram, and in the time that the embodiment of the present invention is described in detail in detail, for ease of explanation, described schematic diagram is example, and it should not limit the scope of protection of the invention at this.
As described in background, in prior art, mostly rely on ratchet sour jujube tongue, power-transfer clutch and feed screw nut to complete locking and release task for the hand relieving mechanism of the parking brake device of rail vehicle braking cylinder.The large quality weight of volume of part of participating, causes parking brake whole unit volume larger.In addition, existing design adopts single spring to realize spring energy-storage, and tooling cost is high, complex process; And while unlocking, most of part is rotated, to having relatively high expectations of grease and bearing.From safeguarding angle, the parts of controlling locking in prior art are enclosed in parks cylinder interior, need to be to parking cylinder integral disassembly, assembly while maintenance, and maintenance difficulties is larger.
In order to reduce parking brake device volume, expendable weight, the invention provides a kind of parking brake device for rail vehicle braking cylinder, referring to Fig. 1, comprising: cylinder body 8, cylinder cap 10, parking brake piston 7, park spring assembly 1, parking brake push rod 4, taper pin 5, hand and alleviate assembly 19.Wherein, cylinder body 8 and cylinder cap 10 can be bolted, and in interface sealing, form an airtight space.Parking brake piston 7 is arranged in this confined space, thereby periphery can be by press-fiting leather cup and inboard wall of cylinder block slipper seal, and the piston bush 6 of parking of interior week and upper end open is fixed together, for example, pass through interference fit.Piston bush 6 has multiple depressed parts 25 on side face therein, for example hemispheric depressed part.Parking brake push rod 4 is positioned at the middle part of parking brake piston 7 perpendicular with it and extend, and can extend downwardly into outside the hole on cylinder body 8 to apply parking brake.Parking brake push rod 4 has inner space, and for example in one embodiment, parking brake push rod 4 has the sleeve 20 that forms this inner space in the top.Taper pin 5 is supported on the bottom surface of this inner space by spring 3.Should be appreciated that those skilled in the art can visualize other structures and form the inner space of parking brake push rod.By forming at sleeve 20 on the basis of this inner space, the present invention is described below.Taper pin has two parts that diameter is different in the vertical, is respectively smaller diameter portion 21 and larger diameter part 22, and the different part of these two diameters connects by an inclined-plane 23.On the sidewall of sleeve, there are the multiple hole 24(s corresponding with the depressed part of piston bush 6 and see Fig. 2).Steel ball is arranged in described hole 24, and can between the periphery of taper pin and described depressed part, move.In the time that steel ball contacts with the periphery of the smaller diameter portion 21 of described taper pin or is relative, sleeve 20(parking brake push rod 4) can be movable relatively with piston 7.When steel ball is acted on by the inclined-plane 23 of described taper pin and while being headed in the depressed part 25 of piston bush 6, steel ball contacts with described larger diameter part 22 or be relative, simultaneously sleeve 20(parking brake push rod 4) lock together by described steel ball and piston 7.It will be appreciated by those skilled in the art that park the size of the depressed part on piston bush 6 should be not excessive, otherwise steel ball can not lock together piston 7 and sleeve (parking brake push rod 4).
Park spring assembly 1 between cylinder cap 10 and parking brake piston 7.Locating ring 15 is arranged in the sleeve of parking brake push rod 4 tops, and is positioned at the top of taper pin 5.Cylinder cap 10 tops have hole, and hand is alleviated assembly 19 through this hole layout.Hand is alleviated assembly and is positioned at top surface of cylinder cover, comprising: slide block 13, is arranged in above the middle opening of locating ring 15; Axle 14, extends through the middle opening of locating ring 15, form bearing fit, thereby slide block 13 can extend or retract along rotating shaft 14 with slide block 13; Pushing block 26(is shown in Fig. 2), be fixed on the bottom of axle 14, being dimensioned to of this pushing block is stopped 15, ring and limits, and in the time that slide block 13 extends and tilts along axle 14, as Fig. 6, this pushing block moves down this taper pin 5 of promotion; Pull bar 16; Orienting lug 12, slide block 13 is connected with pull bar 16 by orienting lug 12, thus by pull bar, operating personal can be controlled this slide block and extends or retract.Hand is alleviated assembly can also comprise extension spring 11, is connected to hand and alleviates between the housing and orienting lug of assembly, resets for making hand alleviate assembly.On slide block 13, also comprise two expansion slot, support the remote manual relieving apparatus of maximum two of expansion.According to the needs of structure, pull bar 16 can be perpendicular with parking brake push rod 4, and the two can be also parallel relation or become other angles.
Parking brake push rod 4, hand alleviate taper pin 5 and axle 14 has been parking brake function and the parts of removing lock function.Axle 14 is the function parts that unlock, and is alleviated taper pin 5 compress when locking under the effect of taper pin restoring spring 3 by hand.Hand is alleviated pull bar 16, orienting lug 12, extension spring 11, axle 13, slide block 13 and the fabricate block of sleeve pipe composition and is connected with cylinder cap by screw.Sleeve pipe is wherein wrapped in rotating shaft 14 outsides, forms sliding motion pair with rotating shaft 14.Sleeve pipe is connected with slide block 13 by pin, and slide block 13 one end are that hand is alleviated pull bar 16, and the other end is the extension spring 11 in order to reset.
Together with parking brake piston 7 can be locked in by the steel ball 2 being supported by hand alleviation taper pin 5 with parking brake push rod 4.When being filled with after pressurized air, parking brake piston 7 moves, and parks spring assembly 1 compressed with energy storage, drives steel ball, retraction parking brake push rod 4 by parking piston bush 6 simultaneously.Parking Brake Cylinders is in relieved state.
In the time that pressure gas is discharged, to park spring assembly 1 energy and discharge, parking brake piston 7 promotes to park piston bush 6 under the effect of parking spring assembly 1, drives steel ball 2, releases parking brake push rod 4, applies parking brake.
In the time that needs carry out hand relieving, operation hand relieving pull bar 16, lock-out state is destroyed.Parking brake push rod 4 is regained, and parking brake piston 7 drops to bottom in the effect of parking spring assembly 1.In the time that needs reset, be filled with pressurized air, parking brake piston reset.
Introduce in detail the working process of the parking brake device for rail vehicle braking cylinder of the present invention below in conjunction with accompanying drawing.
1. parking brake resets
This brake equipment when initial in hand relieving state, as shown in Figure 1.At hand relieving state, parking brake push rod 4 return back in cylinder body, parks piston 7 and is positioned at cylinder base, and steel ball or contact relative with smaller diameter portion 21, departs from and park the depressed part of piston bush 6.In the time that needs use parking brake, need first parking brake to be resetted, make system in parking brake active position.Note, " parking brake active position " herein represents that brake cylinder is ready to apply parking brake, but the unactual parking brake that applies also.
As shown in Figure 2, when pressurized air is shown in Fig. 2 from porting F() while entering Parking Brake Cylinders, parking brake piston 7 overcomes the power of parking spring assembly 1 and moves up under compressed-air actuated effect.In moving process, restoring spring 3 is given 5 one of taper pins power upwards always.On taper pin 5 continues, move, the inclined-plane 23 on it starts to contact steel ball, as shown in Figure 2.Inclined-plane 23 on taper pin 5 acts on steel ball 2, applies power horizontally outward, starts steel ball 2 to be pushed to gradually in the depressed part of parking piston bush 6.On taper pin 5 continues, move, the larger diameter part on it starts to contact steel ball 2, and now the position of steel ball as shown in Figure 3.Owing to parking the restriction of depressed part of piston bush 6, steel ball 2 remains on this position, is compressed to a certain degree until park spring assembly 1.Now, steel ball 2 pushed outwards go out to parking in the depressed part of piston bush 6, simultaneously hand is alleviated taper pin 5 and is positioned at parking brake active position, as shown in Figure 3.In this position, parking brake push rod 4 locks by steel ball 2 with parking brake piston 7, and brake cylinder has been carried out the Job readiness that applies parking brake.
When after state shown in arrival Fig. 3, parking brake functional rehabilitation, parks reseting procedure and completes.The air pressure that recovering parking brake function needs is minimum restoring pressure.In rejuvenation, parking brake push rod 4 is always in alleviating position (not stretching out outside cylinder body 8).Minimum restoring pressure is released the pressure and is equated with brake cylinder minimum.
2. apply parking brake.
After parking reseting procedure and completing, parking brake spring assembly 1 has stored energy.Therefore in the time that Parking Brake Cylinders bottom pressurized air is discharged, under the effect of parking brake spring assembly 1, parking brake piston 7 moves down.After aforementioned parking brake rejuvenation, steel ball 2 enters in the groove of parking piston bush 6 under the promotion of hand alleviation taper pin 5, and parking brake push rod 4 and parking brake piston 7 are connected as a single entity.Therefore when parking brake piston 7 moves down, parking brake push rod 4 also moves down, and passes cylinder body 8, as shown in Figure 4.
Now, parking brake push rod 4 is exported braking force, and the bang path of power is: park spring assembly 1 → parking brake piston 7 → park piston bush 6 → steel ball 2 → parking brake push rod 4.
3. parking brake is alleviated
In the time not needing to apply parking brake, Parking Brake Cylinders is inflated.In the time that Parking Brake Cylinders is inflated, parking brake piston 7 compresses parking brake spring assembly 1 and moves up.Now hand alleviation taper pin 5 is positioned at parking brake significant condition, steel ball 2 still locks together parking brake push rod 4 and parking brake piston 7, therefore can drive parking brake push rod 4 to move up, in the time that air pressure reaches minimum and releases the pressure, regain completely parking brake push rod bottom.Owing to parking piston bush 6 and parking brake piston 7 interference fit.So the bang path of this process power is: parking brake piston 7 → park piston bush 6 → steel ball 2 → parking brake push rod 4.When parking brake push rod is regained, parking brake is alleviated, as shown in Figure 5.
When brake cylinder is in the time that the parking brake shown in Fig. 4 applies state, parking brake piston 7 is subject to parking the downward power of spring assembly 1, steel ball 2 is subject to braking force counter-force power upwards, and steel ball 2 is by parking brake push rod 4 and park piston 7 and be connected as a single entity, and makes the power of vertical direction reach balance.
4. parking brake hand relieving
When after Parking Brake Cylinders exhaust, brake cylinder applies state in parking brake.If desired while alleviation, because the pressurized air that some reason cannot provide minimum to release the pressure can be alleviated pull bar by operator, operate and alleviate parking brake by hand relieving.
As shown in Figure 6, when pulling hand to alleviate after pull bar 16, hand is alleviated pull bar 16 and is driven orienting lug 12 to move.Orienting lug 12 is connected by resilient pin with slide block 13, and slide block is followed it and moved and drive rotating shaft 14 deflections.The pushing block of rotating shaft bottom is stopped ring 15 restrictions, and the application force that this pushing block promotion hand alleviation taper pin 5 overcomes taper pin restoring spring 3 moves down, and the larger diameter part 22 of taper pin 5 starts gradually disengaging and contacts with steel ball 2.
Parking brake piston 7 is subject to parking the thrust of spring assembly 1, by after parking inclined-plane in piston bush 6 steel ball 2 being pushed in the darker groove of taper pin 5, parking brake piston 7 separates with parking brake push rod 4, parking brake piston 7 is pushed away drops down onto cylinder body 8 bottoms, parking brake is disengaged, and parking brake power disappears.Hand is alleviated taper pin 5 in parking brake failure state.Parking brake is by hand relieving.State after hand relieving as shown in Figure 1.
In the time that needs recover parking brake function, need to be filled with minimum to Parking Brake Cylinders according to the method for setting forth in parking brake reseting procedure and release the pressure.
In other embodiments of the invention, described steel ball can be multiple with parking spring assembly, participates in shown in Fig. 7 and Fig. 8, and parking spring assembly is described in 8, to park spring assembly to be uniformly distributed along inboard wall of cylinder block; Steel ball is 6, and described steel ball is uniformly distributed along parking piston bush inwall.
Parking brake device for rail vehicle braking cylinder provided by the invention, while needing braking, reset, hand to alleviate braking, movable part parking brake push rod in parking brake device, hand are alleviated between taper pin, rotating shaft, orienting lug, extension spring, slide block as sliding or rotating, do not need to adopt the parts such as ratchet of the prior art, sour jujube tongue, power-transfer clutch and feed screw nut, therefore compact conformation, the little quality of volume is light.
In addition, the spring of energy storage adopts retarding spring group, less demanding to processing technology, and tooling cost is lower.Rotatablely moving when operation between parts is few, therefore, simple in structure and be convenient to expansion, reduces maintenance cost and repair time.
The above, be only preferred embodiment of the present invention, not the present invention done to any pro forma restriction.Any those of ordinary skill in the art, do not departing from technical solution of the present invention scope situation, all can utilize method and the technology contents of above-mentioned announcement to make many possible variations and modification to technical solution of the present invention, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not depart from technical solution of the present invention,, all still belongs in the scope of technical solution of the present invention protection any simple modification made for any of the above embodiments, equivalent variations and modification according to technical spirit of the present invention.
Claims (17)
1. for a parking brake device for rail vehicle braking cylinder, comprising:
Cylinder body;
Cylinder cap, is connected to form enclosure space with cylinder body seal;
Parking brake piston, is arranged in this enclosure space, periphery and inboard wall of cylinder block slipper seal;
Upper end open park piston bush, be fixed on the interior week of parking brake piston, described in park piston bush and on inner peripheral surface, there is depressed part; With
Have the parking brake push rod of an inner space, arrange through the central authorities of described parking brake piston, on described parking brake push rod, have the hole corresponding with described depressed part, spheroid is arranged in this hole;
Pin, on the bottom surface of the inner space of described parking brake push rod, relative with described spheroid by spring supporting, described pin has smaller diameter portion and larger diameter part on its longitudinal direction,
Wherein in the time that described larger diameter part contacts with described spheroid, thereby being partly pressed into, spheroid in described depressed part, will park piston bush and described parking brake push rod locks together, in the time that described smaller diameter portion is relative with described spheroid, spheroid departs from described depressed part, thereby parks piston bush and described parking brake push rod is disengaged locking.
2. parking brake device as claimed in claim 1, is characterized in that, also comprises the hand alleviation assembly of arranging through the hole on cylinder cap, for the locking of parking piston bush and described parking brake push rod described in manual releasing.
3. parking brake device as claimed in claim 2, is characterized in that, described hand is alleviated assembly and comprised: pull bar, is suitable for being operated by operating personal; Orienting lug, is connected with described pull bar; Slide block, is connected with described orienting lug; Rotating shaft, extends or retracts thereby form bearing fit with described slide block; Pushing block, is fixed on described rotating shaft bottom, and in the time that described pull bar is pulled, described pushing block pushes against described pin to unlock.
4. parking brake device as claimed in claim 3, is characterized in that, in described inner space, has locating ring, is positioned at the top of described pin, and is positioned at the top of described pushing block, so that described pushing block is limited between described locating ring and described pin.
5. parking brake device as claimed in claim 3, is characterized in that, described hand is alleviated assembly and also comprised that the extension spring being connected on orienting lug resets for making hand alleviate assembly.
6. parking brake device as claimed in claim 3, is characterized in that, described slide block also comprises multiple expansion slot, can be used for expanding multiple remote manual relieving apparatus.
7. parking brake device as claimed in claim 1 or 2, is characterized in that, described smaller diameter portion is connected by bevel phase with larger diameter part.
8. parking brake device as claimed in claim 1 or 2, is characterized in that, the hole on described parking brake push rod is uniformly distributed along described parking brake push rod circumferencial direction.
9. parking brake device as claimed in claim 1 or 2, is characterized in that, described parking brake device also comprises the spring assembly of parking between cylinder cap and parking brake piston.
10. parking brake device as claimed in claim 1 or 2, is characterized in that, described cylinder body also comprises porting, and pressurized air can be filled with by this porting.
11. parking brake devices as claimed in claim 9, is characterized in that, described cylinder body also comprises porting, and pressurized air can be filled with by this porting.
12. parking brake devices according to claim 9, is characterized in that, described in park spring assembly and comprise that many groups along inboard wall of cylinder block well-distributed spring.
13. parking brake devices according to claim 3, is characterized in that, the direction of described pull bar is vertical with the direction of described parking brake push rod.
14. parking brake devices according to claim 11, it is characterized in that, in the time that pressurized air is filled with by described porting, described in pressurized air opposing, park spring assembly and make on parking brake piston to move, described larger diameter part starts to contact described spheroid, described in described spheroid is pressed into, park in the depressed part of piston bush, thereby will park piston bush and described parking brake push rod locks together, make parking brake device in parking brake significant condition.
15. parking brake devices according to claim 14, it is characterized in that, in the time that pressurized air is discharged by described porting, described in park spring assembly and promote described parking brake piston and move down, drive described parking brake push rod to move down simultaneously, apply parking brake.
16. parking brake devices according to claim 1, is characterized in that, the top of described parking brake push rod has the sleeve that limits described inner space, and described hole is positioned on the wall of described sleeve.
17. parking brake devices according to claim 3, is characterized in that, the direction of described pull bar is parallel with the direction of described parking brake push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253228.2A CN102756722B (en) | 2012-07-20 | 2012-07-20 | Parking brake device for brake cylinder of railway vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210253228.2A CN102756722B (en) | 2012-07-20 | 2012-07-20 | Parking brake device for brake cylinder of railway vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102756722A CN102756722A (en) | 2012-10-31 |
| CN102756722B true CN102756722B (en) | 2014-08-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210253228.2A Active CN102756722B (en) | 2012-07-20 | 2012-07-20 | Parking brake device for brake cylinder of railway vehicle |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104847815B (en) * | 2015-05-22 | 2017-08-11 | 中国铁道科学研究院 | A kind of Parking Brake Cylinders for rail vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201866138U (en) * | 2010-11-15 | 2011-06-15 | 中国铁道科学研究院机车车辆研究所 | Small-sized spring-mounted parking disc-shaped brake cylinder for rail-bound vehicles |
| CN201895670U (en) * | 2010-12-08 | 2011-07-13 | 青岛四方车辆研究所有限公司 | Spring braking device for railway vehicle unit brake |
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