CN107499333B - Parking Brake Cylinders hand alleviates device - Google Patents
Parking Brake Cylinders hand alleviates device Download PDFInfo
- Publication number
- CN107499333B CN107499333B CN201710785124.9A CN201710785124A CN107499333B CN 107499333 B CN107499333 B CN 107499333B CN 201710785124 A CN201710785124 A CN 201710785124A CN 107499333 B CN107499333 B CN 107499333B
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- Prior art keywords
- parking brake
- bracing wire
- ratchet
- lock pawl
- brake cylinders
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61H—BRAKES OR OTHER RETARDING DEVICES SPECIALLY ADAPTED FOR RAIL VEHICLES; ARRANGEMENT OR DISPOSITION THEREOF IN RAIL VEHICLES
- B61H13/00—Actuating rail vehicle brakes
- B61H13/02—Hand or other personal actuation
Abstract
Parking Brake Cylinders hand alleviates device, alleviation for Parking Brake Cylinders parking brake, the Parking Brake Cylinders include that cylinder body, setting park stored energy mechanism cylinder is intracorporal, and axial be inserted into cylinder body can be with the power transmission sleeve of parking stored energy mechanism cooperative movement, it further comprise the ratchet for being sleeved on power transmission sleeve outer wall, the ratchet lock pawl that ratchet stop can be achieved, and hand alleviates device；It includes bracing wire that the hand, which alleviates device, bracing wire is connect through lever mechanism with ratchet lock pawl, the lever mechanism includes connect with bracing wire and by bracing wire pulling force when rotatable cam mechanism, can be contacted with ratchet lock pawl in cam mechanism rotation process to control ratchet lock pawl and be detached from stop with hook tooth.It changes Parking Brake Cylinders and pulls the connection type for alleviating mechanism and ratchet lock pawl, lever and cam enlarger is used in small space, effectively reduces the hand relieving pulling force of parking brake.
Description
Technical field
The invention belongs to belong to rail locomotive vehicle brake technology field, it is related to a kind of rail locomotive vehicle parking checking cylinder,
Especially a kind of hand of Parking Brake Cylinders alleviates device.
Background technique
Current track traffic locomotive vehicle multi-configuration has unit brake device (such as tread brake list of parking brake function
Member, brake clamp unit), the functional module of parking brake is realized by Parking Brake Cylinders, and Parking Brake Cylinders are braked with air draft, is filled
Wind alleviates characteristic, while hand relieving device is arranged.It is the bases such as rail transit rolling stock that Parking Brake Cylinders hand, which alleviates device,
The important component of brake apparatus, in train windless condition or in brake apparatus malfunction, operating the device when necessary can be real
The alleviation of existing parking brake.
Parking Brake Cylinders include ratchet, the inner cylinder connecting with ratchet, and inner cylinder, which can drive, parks energy storage piston action, thus
It realizes parking brake or parks alleviation.When parking brake, internal ratchet mechanism is stuck, and limits the rotation of checking cylinder inner cylinder, from
And make to park the state that energy storage piston is maintained at parking brake.Existing hand alleviates device and generally includes to pull line, and bracing wire is direct
It is connect with the stuck structure of ratchet, by pulling the stuck structure of ratchet, is disconnected it with ratchet, alleviation is parked in realization.
It is entitled " to be used for rail traffic vehicles basis system in Publication No. CN102795240A in following patent document
The Chinese invention patent of dynamic hand relieving device " discloses a kind of hand relieving device, and the present invention provides a kind of for track
Traffic base brake apparatus, wherein the cylinder of parking of hand relieving device is connected on checking cylinder, and the cylinder of parking is connected to two
Alleviate drag-line, described two alleviate the two sides that drag-line is separately mounted to vehicle, pull any one alleviation drag-line, can make hand
The dynamic pawl seat for alleviating device and locking spine tongue separate, and make in the band parking brake list without the vehicle for putting on-position of always becalming
The release of brake of member.
By pull line and ratchet cooperation structure realize Parking Brake Cylinders alleviation be very convenient, but exist with
Lower deficiency: bracing wire is generally arranged at the two sides of car body, and length is longer, parks the parking brake power of energy storage piston indirectly by ratchet
It transfers to for the stuck structure of ratchet, the stuck structure of direct pull ratchet can be relatively elaborate.
Summary of the invention
It is an object of the invention to apply parking brake hand relieving for hand relieving device in the prior art more to take
The deficiency of power provides a kind of novel Parking Brake Cylinders hand relieving device with labor-saving structure.
In order to achieve the above object, the present invention is the following technical schemes are provided: Parking Brake Cylinders hand alleviates device, for the system of parking
The alleviation of dynamic cylinder parking brake, the Parking Brake Cylinders include that cylinder body, setting park stored energy mechanism cylinder is intracorporal, and axial
Being inserted into cylinder body can further comprise being sleeved on power transmission sleeve outer wall with the power transmission sleeve for parking stored energy mechanism cooperative movement
Ratchet, the ratchet lock pawl that ratchet stop can be achieved, and, hand alleviates device；
It includes bracing wire that the hand, which alleviates device, and bracing wire is connect through lever mechanism with ratchet lock pawl, the lever mechanism packet
Connect with bracing wire and by bracing wire pulling force when rotatable cam mechanism is included, can be connect with lock pawl in cam mechanism rotation process
It touches to control the stop of ratchet lock pawl disengaging and hook tooth.
As preferred: the cam mechanism includes the cam that can be contacted with lock pawl in a rotation process, and, with bracing wire
The bracing wire switching part of connection；The bracing wire switching part is integrated or fixed connection structure with cam.
As preferred: being provided with bracing wire backstop slot on the bracing wire switching part, bracing wire is stuck in bracing wire backstop slot, end
Being connected with can be by the stop component of backstop slot backstop.
As preferred: the lever mechanism further comprises the lever shaft being mounted on cylinder body, cam mechanism and lever
Shaft axis connects.
As preferred: being provided with the cavity for installing lock pawl and lever mechanism on the cylinder body.
As preferred: the cavity include with the matched lock pawl accommodating chamber of stop claw shape, and, with Lever machine be configured
The matched lever mechanism accommodating chamber of shape.
As preferred: further comprising the spring base and retaining spring being mounted in lock pawl accommodating cavity；The stop bullet
Spring both ends are connect with spring base with lock pawl end respectively.
As preferred: the lever mechanism further comprises reduction torsion spring, two ends of the reduction torsion spring respectively with
Cam mechanism and mounting groove contact.
As preferred: the sleeve periphery wall and ratchet internal perisporium are provided with mutually matched card and structure.
As preferred: the card and structure include that the keyway of sleeve periphery wall is arranged in and ratchet internal perisporium is arranged in
Key；Or, the key of sleeve periphery wall is arranged in and the keyway of axial wall in ratchet is arranged in.
The invention has the benefit that
(1) Parking Brake Cylinders are changed and pull the connection type for alleviating mechanism and ratchet lock pawl, are adopted in small space
With lever and cam enlarger, the hand relieving pulling force of parking brake is effectively reduced.Using a reality according to the present invention
Applying the achievable operator of example only can finish all parking brake whole alleviations of vehicle in vehicle side, improve operation
Convenience, in case of emergency more can support vehicles safety, raising rescue efficiency.
(2) ratchet and power transmission sleeve are using being keyed, the structure for replacing existing ratchet and power transmission sleeve to be integrated, maintenance
When Parking Brake Cylinders need not be disassembled, it is only necessary to simply open end cap can be completed, greatly reduce maintenance cost.
Detailed description of the invention
Fig. 1 is Parking Brake Cylinders structural schematic diagram；
Fig. 2 ratchet and power transmission sleeve fit structure schematic diagram；
Fig. 3 is that hand alleviates apparatus structure schematic diagram；
Fig. 4 is that a kind of embodiment hand alleviates apparatus structure schematic diagram；
Fig. 5 is that another embodiment hand alleviates apparatus structure schematic diagram；
Fig. 6 is lever mechanism structural schematic diagram.
Wherein: 1- cylinder body, 201- energy-stored spring seat, 202- spring mounting groove, 203- energy-stored spring, 204- park piston,
3- power transmission sleeve, 301- keyway, 4- ratchet, 401- key, 402- hook tooth, 5- ratchet lock pawl, 6- bracing wire, 601- stop portion
Part, 71- cam mechanism, 711- cam, 712- bracing wire switching part, 7121- bracing wire backstop slot, 72- lever shaft, 8- cavity,
801- lock pawl accommodating chamber, 802- lever mechanism accommodating chamber, 9- bracing wire plug, 10- spring base, 11- retaining spring, 12- retaining ring,
13- reduction torsion spring
Specific embodiment
A specific embodiment of the invention progress is described clear and completely below with reference to attached drawing.Obviously, it is embodied
Mode described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without making creative work,
Belong to protection scope of the present invention.
The present invention provides a kind of Parking Brake Cylinders hands to alleviate device, which changes bracing wire and the connection of ratchet mechanism
Mode, so that the force way of pulling is changed, to can realize that more labour-saving pulls alleviation.
Parking Brake Cylinders hand alleviates device, the alleviation for Parking Brake Cylinders parking brake.
With reference to Fig. 1, Parking Brake Cylinders include cylinder body 1, are arranged in cylinder body 1 and park stored energy mechanism.Each group is parked storage
Energy mechanism includes the energy-stored spring seat 201 being arranged in cylinder body 1, and the spring mounting groove in energy-stored spring mounting base 201 is arranged in
202, the energy-stored spring 203 being mounted in spring mounting groove 202, and contact with energy-stored spring 203 setting park piston 204.
Parking Brake Cylinders further comprise that axial be inserted into cylinder body can be with the power transmission set of parking stored energy mechanism cooperative movement
Cylinder 3.Power transmission sleeve 3 and the fit system for parking stored energy mechanism are as follows: power transmission sleeve 3 and parking is threadedly engaged between piston 204, is passed
When power sleeve 3 rotates, relative motion, compression or alleviation energy-stored spring 203 will be generated with piston 204 is parked, be parked to be formed
Alleviation or parking brake.
Parking Brake Cylinders further comprise the ratchet 4 for being sleeved on 3 outer wall of power transmission sleeve, the ratchet that 4 stop of ratchet can be achieved
Lock pawl 5, and, hand alleviates device.
In the prior art, ratchet 4 and power transmission sleeve 3 are usually designed as integrated mechanism, i.e., in the outer of power transmission sleeve 4
4 structure of a circle ratchet is processed on wall.This structure will cause the inconvenience of dismounting, and device is repaired and safeguarded constant.
Parking brake cylinder structure provided in this embodiment changes the fit structure of power transmission sleeve 3 Yu ratchet 3, by the two plus
Work is isolated structure.In sleeve periphery wall and ratchet internal perisporium, mutually matched card and structure are set, both make through card and
Structure card and.Specific a kind of embodiment are as follows: card and structure make key be stuck in key using the structure of mutually matched key and keyway
In slot, to realize fixation.Specifically, block and structure includes that the keyway of sleeve periphery wall is arranged in and is arranged in ratchet internal perisporium
Key；Or, the key of sleeve periphery wall is arranged in and the keyway of axial wall in ratchet is arranged in, specific Working position is not limited.Ginseng
Examine Fig. 2, in the present embodiment, card and structure include the key 401 that ratchet internal perisporium is arranged in and the keyway that sleeve periphery wall is arranged in
301, the quantity of key 401 and keyway 301 can be equipped with multiple groups, when installation, guarantee that key 401 is stuck in keyway 301, when ratchet 4
When damage, dismounting and change.
This mounting structure of ratchet 4 and power transmission sleeve 3, so that there are two types of relative motion modes for the two tool.The first are as follows:
When being stopped, power transmission sleeve 3 is only axially moved with respect to ratchet for ratchet 4 and power transmission sleeve 3；(this is to fill stopping for air draft generation
The movement that the alleviation put is generated with braking)；Second are as follows: when the stop of ratchet 4 and power transmission sleeve 3 is released from, power transmission sleeve with
Ratchet rotates simultaneously, in addition, power transmission sleeve 3 generate and be axially moved with respect to ratchet 4 (this to pull alleviation, or after pulling alleviation
Fill the movement of wind generation).Therefore after ratchet 4 is stopped, power transmission sleeve 3 will not be able to rotate, due to energy-stored spring 203 compression or
Elongation, which will generate, parks alleviation or parking brake.
Hand alleviates device for alleviating parking brake state, even if more than 4 power transmission sleeve 3 of ratchet rotates, parks to alleviate
Extruding of the piston 204 to energy-stored spring 203.
With specific reference to Fig. 3, it includes bracing wire 6 that hand, which alleviates device, and bracing wire 6 is connect through lever mechanism with ratchet lock pawl 5.Lever
Mechanism is transmitted to ratchet lock pawl 5 from bracing wire 6 as the switching between bracing wire 6 and ratchet lock pawl 5, by pulling force.Lever mechanism
Including connect with bracing wire 6 and by 6 pulling force of bracing wire when rotatable cam mechanism 71, the protrusion part of cam mechanism 71 is turning
It can be contacted with ratchet lock pawl 5 during dynamic to control the stop of ratchet lock pawl 5 disengaging and hook tooth 402.
Specifically, under default conditions, ratchet lock pawl 5 is blocked with hook tooth 401, makes 4 stop of ratchet, but draw when pulling
When line 6, cam mechanism 71 is rotated, and protrusion part is contacted with ratchet lock pawl 5, is continued in rotation process in cam mechanism 71, convex
Part will push ratchet lock pawl 5 along 4 radial motion of ratchet out, and this movement will be such that ratchet lock pawl 5 is detached to hook tooth 401
Stop.Ratchet 4 and power transmission sleeve 3 rotate common rotation, while power transmission sleeve 3 moves down, and drive is parked piston 204 and gradually released
The power of energy-stored spring 203, parking brake state are alleviated.Compared to direct pull ratchet lock pawl 5, the setting of lever mechanism passes through
Rotatory force is turned to the mode being applied on ratchet lock pawl 5, realizes the effect of more labor-saving hand relieving.
The principle of hand relieving is as above, a kind of structure of specific cam mechanism 71 provided below.
With reference to Fig. 6, cam mechanism 71 includes the cam 711 that can be contacted with ratchet lock pawl 5 in a rotation process, and,
The bracing wire switching part 712 being connect with bracing wire 6；The bracing wire switching part 712 is integrated or fixed connection structure with cam 711,
So that pulling force directly acts on bracing wire switching part 712, then indirect rotation cam 711 when pulling bracing wire 6.Bracing wire switching part
712 structure does not do specific limitation, is the part that can connect with bracing wire 6 extended from cam 711, the present embodiment
In, bracing wire switching part 712, which is one, has certain thickness plate structure perpendicular to 711 rotational plane of cam, plays similar
The effect of lever.
In order to realize the connection of bracing wire 6 Yu bracing wire switching part 712, bracing wire backstop slot is provided on bracing wire switching part 712
7121, bracing wire 6 is stuck in bracing wire backstop slot 7121, and end is connected with can be by the stop component of 7121 backstop of bracing wire backstop slot
601, the end face of backstopping assembly 601 is greater than the notch area of backstop slot 7121, and bracing wire 6 is avoided to deviate from.This solves
The installation question of bracing wire 6 and lever construction.
It should be noted that the quantity of bracing wire 6 be without limitation, can according to need selection setting one, two or
More.Fig. 4 and Fig. 5 is referred to respectively, for example, scheme provided in this embodiment, the quantity of bracing wire 6 is two, is provided with accordingly
Two bracing wire backstop slots 712 are respectively used to two bracing wires 6 of installation, wherein two sets pull alleviation interface and parking brake may be implemented
Bilateral hand relieving.It is if only needing to configure a bracing wire, another bracing wire backstop slot 712 is vacant, or bracing wire is set and is blocked up
First 9 are blocked, and meet the needs of client is using 1 set of bracing wire, and the degree of modularity is high, and use scope is wide.
Lever mechanism further comprises the lever shaft 72 being mounted on cylinder body 1, cam mechanism 71 and 72 axis of lever shaft
It connects.Specifically, the cam 711 in cam mechanism 71 connects with 72 axis of lever shaft, and cam 711 is rotated around lever shaft 72.This
Kind structure can guarantee the more stable rotates effe of cam mechanism 71.
When needing hand relieving, bracing wire 6 is pulled, since the stop of stop component 601 acts on, pulling force is through bracing wire backstop slot
7121 partial actions drive bracing wire switching part 712 to rotate in bracing wire switching part 712, to rotate with moving cam 711.Cam 711
Drive the principle of the movement of ratchet lock pawl 5 and hand relieving as described above, details are not described herein again.
In order to solve the problems, such as lever mechanism install, be further provided on cylinder body 1 for install ratchet lock pawl 6 and
The cavity 8 of lever mechanism.The setting position of cavity 8 needs to guarantee that ratchet lock pawl 5 can be matched with the position of ratchet 4.
In the present embodiment, a cavity 8 is reprocessed on an end face of cylinder body 1, cavity 8 includes and ratchet lock pawl 5
The matched lock pawl accommodating chamber 801 of shape, and, with the matched lever mechanism accommodating chamber 802 of lever mechanism shape.Lock pawl holds
Chamber 801 of receiving needs to guarantee that ratchet lock pawl 5 can be moved back and forth along 4 radial direction of ratchet, and lever mechanism accommodating chamber 802 needs to protect
Demonstrate,proving cam mechanism can be with normal rotation.
The top of lever mechanism accommodating chamber 802 is opening, by 10 sealing of capping, when lever mechanism component needs replacing
When, removable cover 10 is replaced.
Since during pulling alleviation, ratchet lock pawl 5 and lever mechanism all have opposite movement, in order to guarantee hand
Draw alleviation or parking brake that can apply repeatedly, after needing to pull alleviation, after ratchet lock pawl 5 and lever mechanism movement
It can automatically reset, to guarantee that application can be stablized by pulling alleviation next time.
It therefore, further comprise the spring base 10 and retaining spring 11 being mounted in lock pawl accommodating cavity 801；Stop bullet
11 both ends of spring are connect with spring base 10 with lock pawl end respectively.Radially, the end of lock pawl accommodating chamber 801 is to open
Mouthful, spring base 10 is mounted on the position of opening, is provided with external screw thread on spring base 10, in lock pawl accommodating cavity, is located at spring base
The shaft core position of 10 right ends is provided with the internal screw thread with the cooperation of 10 external screw thread of spring base, and spring base 10 is by way of being threadedly engaged
Installation is stopped after installation by retaining ring 12, and sealant sealing is then smeared.During stop, retaining spring 11 keeps former length, hand
After dynamic alleviation applies, the movement of ratchet lock pawl 5 will compress retaining spring 11, and after stop, retaining spring 11 restores former
Long, ratchet lock pawl 5 further cooperates stop with ratchet 4.Meanwhile this structure, on the one hand solve the installation of spring base 10
The mounting means of problem, screw thread is easy to disassemble, can be through being open in the damage of ratchet lock pawl 5, retaining spring 11 and spring base 10
Replacement is taken out, on the other hand sealing is also solved the problems, such as, keeps the leakproofness of Parking Brake Cylinders, prevent the sundries such as dust and water
Into Parking Brake Cylinders.
Lever mechanism further comprises reduction torsion spring 13, two ends of reduction torsion spring 13 respectively with cam mechanism and lever
Mechanism accommodating chamber 802 contacts.Specifically, reduction torsion spring 13 is contacted with bracing wire switching part 712, during pulling alleviation,
The rotation of lever mechanism will compress reduction torsion spring 13, when the pulling force acted in bracing wire 6 is cancelled, the restoring force of reduction torsion spring 13
Lever mechanism will be made to automatically reset.
The present invention provides a kind of novel Parking Brake Cylinders to pull alleviation mechanism structure, change pull alleviate mechanism with
The connection type of ratchet lock pawl 5.Lever mechanism is set by increasing, realizes the laborsaving technical effect for pulling alleviation, it can be with
Guarantee stable to pull remission effect.
Claims (8)
1. Parking Brake Cylinders hand alleviates device, for the alleviation of Parking Brake Cylinders parking brake, the Parking Brake Cylinders include cylinder
Body, setting park stored energy mechanism cylinder is intracorporal, and it is axial be inserted into cylinder body can with park stored energy mechanism cooperative movement
Power transmission sleeve further comprises the ratchet lock pawl of the ratchet for being sleeved on power transmission sleeve outer wall, achievable ratchet stop, and,
Hand alleviates device；It is characterized by:
It includes bracing wire that the hand, which alleviates device, and bracing wire is connect through lever mechanism with ratchet lock pawl, and the lever mechanism includes one
Connect with bracing wire and by bracing wire pulling force when rotatable cam mechanism, can be connect with ratchet lock pawl in cam mechanism rotation process
It touches to control the stop of ratchet lock pawl disengaging and hook tooth；
The cam mechanism includes the cam that can be contacted with lock pawl in a rotation process, and, the bracing wire connecting with bracing wire turns
Socket part；The bracing wire switching part is integrated or fixed connection structure with cam；
The lever mechanism further comprises the lever shaft being mounted on cylinder body, and cam mechanism connects with lever shaft axis.
2. Parking Brake Cylinders hand as described in claim 1 alleviates device, it is characterised in that: be provided on the bracing wire switching part
Bracing wire backstop slot, bracing wire are stuck in bracing wire backstop slot, and end is connected with can be by the stop component of bracing wire backstop slot backstop.
3. Parking Brake Cylinders hand as claimed in claim 1 or 2 alleviates device, it is characterised in that: be arranged on the cylinder body useful
In installation ratchet lock pawl and the cavity of lever mechanism.
4. Parking Brake Cylinders hand as claimed in claim 3 alleviates device, it is characterised in that: the cavity includes and ratchet stop
The matched lock pawl accommodating chamber of claw shape, and, with the matched lever mechanism accommodating chamber of lever mechanism shape.
5. Parking Brake Cylinders hand as claimed in claim 4 alleviates device, it is characterised in that: further comprise being mounted on lock pawl
Spring base and retaining spring in accommodating cavity；The retaining spring both ends are connect with spring base with lock pawl end respectively.
6. Parking Brake Cylinders hand as claimed in claim 3 alleviates device, it is characterised in that: the lever mechanism further comprises
Two ends of reduction torsion spring, the reduction torsion spring are contacted with cam mechanism and mounting groove respectively.
7. Parking Brake Cylinders hand as described in claim 1 alleviates device, it is characterised in that: the power transmission sleeve periphery wall and spine
Wheel internal perisporium is provided with mutually matched card and structure.
8. Parking Brake Cylinders hand as claimed in claim 7 alleviates device, it is characterised in that: the card and structure exist including setting
The keyway of sleeve periphery wall and the key that ratchet internal perisporium is set；Or, the key of sleeve periphery wall is arranged in and is arranged in ratchet
The keyway of axial wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710785124.9A CN107499333B (en) | 2017-09-04 | 2017-09-04 | Parking Brake Cylinders hand alleviates device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710785124.9A CN107499333B (en) | 2017-09-04 | 2017-09-04 | Parking Brake Cylinders hand alleviates device |
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| CN107499333A CN107499333A (en) | 2017-12-22 |
| CN107499333B true CN107499333B (en) | 2019-05-10 |
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| CN201710785124.9A Active CN107499333B (en) | 2017-09-04 | 2017-09-04 | Parking Brake Cylinders hand alleviates device |
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| CN109080660B (en) * | 2018-08-10 | 2019-12-17 | 中车株洲电力机车有限公司 | passive hydraulic clamp and manual relieving mechanism thereof |
| CN111216760B (en) * | 2018-11-27 | 2021-04-13 | 中车唐山机车车辆有限公司 | Parking brake cylinder relieving device and rail train |
| CN110949443A (en) * | 2019-12-04 | 2020-04-03 | 中车株洲电力机车有限公司 | Parking brake system for railway vehicle and relieving device thereof |
| CN111071289B (en) * | 2020-01-02 | 2020-12-01 | 中车青岛四方车辆研究所有限公司 | Parking cylinder, parking brake unit, brake clamp unit, brake system and vehicle |
| CN112721991B (en) * | 2020-12-29 | 2022-05-17 | 中车制动系统有限公司 | Parking brake cylinder and brake caliper unit |
| CN112744254B (en) * | 2020-12-29 | 2022-03-11 | 青岛思锐科技有限公司 | Relieving device, parking brake cylinder and brake clamp unit |
| CN112896230B (en) * | 2021-01-18 | 2022-07-26 | 中车青岛四方车辆研究所有限公司 | Braking clamp and rail train |
| CN112849201B (en) * | 2021-03-15 | 2022-04-08 | 中车株洲电力机车有限公司 | Rail vehicle and parking brake device thereof |
| CN114394072B (en) * | 2022-01-06 | 2023-08-08 | 中车齐齐哈尔车辆有限公司 | Brake valve relief operation device |
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| CN204264172U (en) * | 2014-11-26 | 2015-04-15 | 南京浦镇海泰制动设备有限公司 | A kind of guideway vehicle foundation brake parks the relieving apparatus of cylinder |
| CN106740971A (en) * | 2016-12-15 | 2017-05-31 | 中车青岛四方车辆研究所有限公司 | The hand relieving device of rail vehicle Parking Brake Cylinders |
| CN106545603A (en) * | 2016-12-26 | 2017-03-29 | 常州中车铁马科技实业有限公司 | Vehicle band Parking Brake Cylinders |
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| CN107499333A (en) | 2017-12-22 |
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