CN101774375B - Air brake valve for locomotive and use method thereof - Google Patents
Air brake valve for locomotive and use method thereof Download PDFInfo
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- CN101774375B CN101774375B CN2010101248735A CN201010124873A CN101774375B CN 101774375 B CN101774375 B CN 101774375B CN 2010101248735 A CN2010101248735 A CN 2010101248735A CN 201010124873 A CN201010124873 A CN 201010124873A CN 101774375 B CN101774375 B CN 101774375B
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Abstract
The invention provides an air brake valve for a locomotive, which is characterized by comprising a cam box, a valve body and an air exhaust valve; a hand shaft is arranged in the cam box, the center of the hand shaft is provided with a mandril, and the hand shaft is sequentially sleeved with a first cam, a second cam, a third cam and a fourth cam from up to down; a conversion plunger is arranged in the valve body, preset distance is pre-reserved between the conversion plunger and the first cam, and a positioning plunger and an action plunger are also arranged in the valve body; the air brake valve for the locomotive also comprises an interlock switch group; and the interlock switch group comprises a first micro switch controlled by the first cam, a second micro switch controlled by the second cam, a third micro switch controlled by the third cam, and a fourth micro switch controlled by the fourth cam. The invention can transmit the signals of the four working positions of the air brake valve to a computer, and the computer controls a driven locomotive to realize the synchronous action with a main control locomotive.
Description
Technical field
The present invention relates to the braking technology field, be specifically related to a kind of air brake valve for locomotive.
Background technology
Electropneumatic brake is locomotive braking system a kind of braking model commonly used, DK-1 type locomotive electro-pneumatic brake with China's the seventies in last century development is an example, because of its have the decompression amount accurately, fill advantages such as wind is fast, the brake activation valve bar handle is flexible, noise emission is little, be widely used in the brake system of locomotive at present.
In the locomotive electro-pneumatic brake, air brake valve is its core component.Air brake valve has the two kinds of operating modes in electric room and air position, in electric room, controls braking, pressurize and the alleviation of locomotive separately by the pressure of control action chamber, and this moment, air brake valve played the effect of " little lock "; In the air position, can control braking, pressurize and the alleviation of full train by the pressure of control equalizing reservoir, this moment, air brake valve played the effect of " big lock ".In above-mentioned operating mode, air brake valve has four representative type control positioies, puts in order to be followed successively by by conter clockwise and alleviates position, driving position, neutral position and retarder location.
See also Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the birds-eye view of the air brake valve for locomotive in the DK-1 type locomotive electro-pneumatic brake under the prior art, Fig. 2 is the cutaway view of air brake valve shown in Figure 1 along the A-A direction, and Fig. 3 is the part sectional view of air brake valve shown in Figure 1 along the B-B direction.Described air brake valve for locomotive comprise valve body 1 and with valve body bonded assembly cam case 2, in the lower end of cam case 2, exhaust valve 4 is installed also.
Handgrip axle 101 is installed in cam case 2, handgrip axle 101 is hollow square axle structure, the top of handgrip axle 101 passes cam case and is connected with handle bracket 102, and also location and installation has push rod 103 at handgrip axle 101 centers, is equipped with on the handle bracket 102 and push rod bonded assembly handgrip 102a.The outer cover of the handgrip shaft portion in cam case 2 is equipped with positioning cam 104 and operating cam 105, and described positioning cam 104 is installed in the upside of described operating cam 105.
Conversion plunger 119, position ram 114, effect plunger 115 are installed in valve body 1; Described conversion plunger 119 can switch between the two kinds of operating modes in electric room and air position by the control air brake activation valve.Described effect plunger 115 is by described operating cam 105 controls, and described position ram 114 is by described positioning cam 104 controls.
The interlocking switch group also is installed in cam case, described interlocking switch group comprises two micro-switchs being controlled by positioning cam and conversion plunger respectively, the first micro-switch 104a by positioning cam 104 controls can give control end with the electric signal transmission of positioning cam, the signal of two kinds of operating modes of electropneumatic brake valve can be passed to computing machine by the micro-switch 109a that changes plunger control 109.
In above-mentioned air brake valve, by rotating described handgrip 102a, can drive 101 rotations of handle bracket 102 control handgrip axles, thereby the positioning cam and the operating cam that drive on the handgrip axle are controlled position ram and effect plunger, to realize that air brake valve is in the switching of alleviating between position, retarder location, neutral position and four control positioies of driving position.When air brake valve is in control position in above-mentioned four control positioies, can give control end with the electric signal transmission of positioning cam by the micro-switch of positioning cam control.
Development along with the Heavy-Haul Railway transportation, need control slave locomotive and the run-in synchronism of master control locomotive that whole train is worked smoothly, promptly need slave locomotive action and each control position of master control locomotive be consistent, the action of slave locomotive is generally controlled by the wireless synchronization control system.In existing air brake valve, owing to have only micro-switch of positioning cam control, therefore in four control positioies of air brake valve, can only produce two electric signal at most and pass to the wireless synchronization control system, therefore the wireless synchronization control system of controlling slave locomotive can only receive the working signal of two control positioies of master control locomotive in fact at most, and can not receive the working signal of two other control position of master control locomotive, therefore can not realize the synchronization action of slave locomotive and master control locomotive.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of air brake valve for locomotive, by this air brake valve, gives control end with the signal feedback of whole control positioies of master control locomotive, thereby realizes the synchronization action of slave locomotive and master control locomotive.
In order to solve above technical matters, first technical scheme provided by the invention is:
A kind of air brake valve for locomotive is characterized in that, comprise cam case, with cam case one side bonded assembly valve body, be installed in the exhaust valve of described cam case bottom;
The handgrip axle is installed in described cam case, push rod is arranged, outside described handgrip axle, be set with first cam, second cam, the 3rd cam and four-cam from top to bottom successively at the central mounting of described handgrip axle;
In described valve body with on the corresponding position of described first cam, the conversion plunger is installed, be reserved with preset distance between described conversion plunger and described first cam, in described valve body, also be equipped with by the position ram of described second cam-controlled, by the effect plunger of described four-cam control;
Described air brake valve for locomotive also comprises the interlocking switch group, and described interlocking switch group comprises by first micro-switch of described first cam-controlled, by second micro-switch of described second cam-controlled, by the 3rd micro-switch of described the 3rd cam-controlled, by the 4th micro-switch of described four-cam control.
Second optimized technical scheme of air brake valve for locomotive provided by the invention be, is equipped with below described exhaust valve and the slow feeler lever of described push rod bottom bonded assembly list, and described interlocking switch group also comprises the 5th micro-switch by the slow feeler lever control of described list.
The present invention also provides first kind of using method of first technical scheme of described locomotive air brake activation valve, comprising:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, alleviating described first micro-switch generation of control alleviation position electric signal transmission to computing machine by described first cam, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, control described the 3rd micro-switch by described the 3rd cam at retarder location and produce the retarder location electric signal transmission, produce neutrality position electric signal transmission by described four-cam at described the 4th micro-switch of neutral position control and give described computing machine to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive.
The present invention also provides second kind of using method of first technical scheme of described locomotive air brake activation valve, comprising:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, control described first micro-switch by described first cam at retarder location and produce the retarder location electric signal transmission to computing machine, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, alleviating described the 3rd micro-switch generation of control alleviation position electric signal transmission to described computing machine by described the 3rd cam, controlling described the 4th micro-switch by described four-cam at neutral and produce neutrality position electric signal transmission to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive.
The present invention also provides first kind of using method of second technical scheme of described locomotive air brake activation valve, comprising:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, alleviating described first micro-switch generation of control alleviation position electric signal transmission to computing machine by described first cam, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, control described the 3rd micro-switch by described the 3rd cam at retarder location and produce the retarder location electric signal transmission, produce neutrality position electric signal transmission by described four-cam at described the 4th micro-switch of neutral position control and give described computing machine to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive;
Press down handgrip, the slow signal of the list that described the 5th micro-switch will produce passes to described computing machine, and described computing machine is according to the slow signal control slave locomotive of described list.
The present invention also provides first kind of using method of second technical scheme of described locomotive air brake activation valve, comprising:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, control described first micro-switch by described first cam at retarder location and produce the retarder location electric signal transmission to computing machine, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, alleviating described the 3rd micro-switch generation of control alleviation position electric signal transmission to described computing machine by described the 3rd cam, controlling described the 4th micro-switch by described four-cam at neutral and produce neutrality position electric signal transmission to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive;
Press down handgrip, the slow signal of the list that described the 5th micro-switch will produce passes to described computing machine, and described computing machine is according to the slow signal control slave locomotive of described list
The invention provides a kind of air brake valve for locomotive, in the cam case of this air brake valve, first cam has been installed, second cam, the 3rd cam, four-cam, described four cams are controlled four micro-switchs of interlocking switch group respectively, when being in respectively, air brake valve alleviates the position, driving position, when retarder location and neutral position, above-mentioned four cams can produce cooresponding electric signal transmission respectively and give computing machine in described four positions, carry out synchronization action by computing machine according to the electric signal control slave locomotive and the master control locomotive of corresponding four positions of air brake valve then.
A kind of preferred embodiment in, the present invention has further increased single slow feeler lever and controlled by the slow feeler lever of described list in exhaust valve the 5th micro-switch, like this, when master control locomotive air brake valve presses down the slow locomotive of handgrip list, control end can delay the air brake valve events of signal control slave locomotive according to the list that produces, thereby realizes the synchronization action of slave locomotive and master control locomotive.
Description of drawings
Fig. 1 is the birds-eye view of existing air brake valve for locomotive;
Fig. 2 is that air brake valve shown in Figure 1 is along A-A direction cutaway view;
Fig. 3 is that air brake valve shown in Figure 1 is along B-B direction cutaway view;
Fig. 4 is an air brake valve for locomotive birds-eye view provided by the invention;
Fig. 5 is that air brake valve shown in Figure 4 is along A-A direction cutaway view;
Fig. 6 is that air brake valve shown in Figure 4 is along B-B direction cutaway view;
Fig. 7 is the first cam structure scheme drawing in the air brake valve for locomotive shown in Figure 4;
Fig. 8 is the second cam structure scheme drawing in the air brake valve for locomotive shown in Figure 4;
Fig. 9 is the 3rd a cam structure scheme drawing in the air brake valve for locomotive shown in Figure 4;
Figure 10 is the four-cam structural representation in the air brake valve for locomotive shown in Figure 4.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills belong to the scope of protection of the invention not making the every other embodiment that is obtained under the creative work prerequisite.
See also Fig. 4, Fig. 5 and Fig. 6, Fig. 4 is the scheme drawing of a kind of air brake valve for locomotive provided by the invention, and Fig. 5 is the cutaway view of air brake valve shown in Figure 4 along the A-A direction, and Fig. 6 is the part sectional view of air brake valve shown in Figure 4 along the B-B direction.In the present embodiment, described air brake valve for locomotive comprises cam case 20, with cam case 20 1 side bonded assembly valve bodies 10, be installed in the exhaust valve 40 of described cam case bottom.
Top at described cam case also is equipped with handle bracket 30, the top of described handgrip axle 201 passes described cam case 20 and captives joint with described handle bracket 30, on described handle bracket 30, handgrip 301 is installed, described handgrip 301 is captiveed joint with described push rod 202, move handgrip 301 by the operator, can drive push rod 202 rotations, thereby drive handgrip axle 201 rotation together, when pressing handgrip 301 downwards, can drive push rod and axially do sliding motion downwards along the handgrip axle with respect to the handgrip axle.
The outside of the handgrip shaft portion in cam case is set with first cam 203, second cam 204, the 3rd cam 205, four-cam 206 from top to bottom successively.In valve body 10, with also be equipped with on the corresponding position of described first cam conversion plunger 209, be reserved with preset distance between described conversion plunger and described first cam.Preset distance be instigate normalized distance that the transition mast plug 209 and first cam 203 can both carry out work from, compare with prior art, the present invention has reduced the entire length of conversion plunger, removed micro-switch, but on the guidance panel of master control locomotive, separately air brake valve has been passed to computing machine at the signal of two kinds of operating modes by the control of conversion plunger.
In valve body 10, position ram 101 and effect plunger 102 also are installed, described position ram 101 and described effect plunger 102 are controlled by described first cam 203 and four-cam 206 respectively, when rotary handle drives the rotation of handgrip axle, rotate and control position ram and effect plunger by driving positioning cam and operating cam, air brake valve is switched between different control positioies.
For the electric signal with four control positioies of air brake valve passes to computing machine respectively, described air brake valve also comprises the interlocking switch group, and the described switches set that contracts comprises by first micro-switch 213 of described first cam-controlled, by second micro-switch 214 of described second cam-controlled, by the 3rd micro-switch 215 of described the 3rd cam-controlled, by the 4th micro-switch 216 of described four-cam control.
See also Fig. 7, be the first cam section scheme drawing among Fig. 4, described first cam 203 has the cam curved surface 203a that contacts with first micro-switch, when 203 rotations of first cam, control the switch motion of the 3rd micro-switch 213 by the cam curved surface 203a of described first cam 203, produce electric signal, this electric signal can pass to computing machine, then by the computer controlled slave locomotive with carry out the action synchronous with the master control locomotive.
See also Fig. 8, be the second cam section scheme drawing among Fig. 4, described second cam 204 has first cam curved surface 204a that contacts with position ram and the second cam curved surface 204b that contacts with second micro-switch 214, when 204 rotations of second cam, the first cam curved surface 204a by described second cam controls described position ram, control the switch motion generation electric signal of described second micro-switch 214 by the second cam curved surface 204b of described second cam, this electric signal can pass to computing machine, then by the computer controlled slave locomotive with carry out the action synchronous with the master control locomotive.
See also Fig. 9, be the 3rd cam 205 schematic cross-sections among Fig. 4, described the 3rd cam 205 has the cam curved surface 205a that contacts with the 3rd micro-switch 215, when brake shoe expander 205 rotations, control the action generation electric signal that goes into operation of described the 3rd micro-switch 215 by the cam curved surface 205a of described brake shoe expander, this electric signal can pass to computing machine, then by the computer controlled slave locomotive with carry out the action synchronous with the master control locomotive.
See also Figure 10, be four-cam 206 schematic cross-sections among Fig. 4, described four-cam 206 has and effect plunger first cam curved surface 206a that contacts and the second cam curved surface 206b that contacts with the 4th micro-switch 216, when 206 rotations of effect cam, the first cam curved surface 206a by described four-cam controls described effect plunger, control the switch motion generation electric signal of described the 4th micro-switch 216 by the second cam curved surface 206b of described four-cam, this electric signal can pass to computing machine, then by the computer controlled slave locomotive with carry out the action synchronous with the master control locomotive.
According to the present invention, for the signal that will press down handgrip passes to control end, air brake valve provided by the invention further comprise be installed in exhaust valve 40 times, with the slow feeler lever 207 of the bottom bonded assembly list of described exhaust valve, the slow feeler lever of described list is connected with the 5th micro-switch 217, when pressing down handgrip, driving single slow feeler lever 207 moves downward, control the switch motion of the 5th micro-switch 217, produce single slow position electric signal, should single slow position electric signal transmission give computing machine by circuit then, delay electric signal control slave locomotive in position by computing machine according to described list again.
The detailed process of a kind of using method of the air brake valve that provides in the above-mentioned specific embodiment below is provided, when rotary handle makes air brake valve be in the alleviation position, the switch motion of described first micro-switch 213 of described first cam, 203 controls, produce and alleviate the position electric signal, to alleviate the position electric signal transmission by circuit then and give computing machine, control slave locomotive by computing machine according to described alleviation position electric signal then.
When rotary handle makes air brake valve be in driving position, the switch motion of described second micro-switch 214 of described second cam, 204 controls, produce the driving position electric signal, give computing machine by circuit with the driving position electric signal transmission then, control slave locomotive by computing machine according to described driving position electric signal then.
When rotary handle makes air brake valve be in retarder location, the switch motion of described the 3rd micro-switch 215 of described the 3rd cam 205 controls, produce the retarder location electric signal, give the computing machine of locomotive by circuit with the retarder location electric signal transmission then, then by computing machine according to described retarder location electric signal control slave locomotive.
When rotary handle makes air brake valve be in neutral position, the switch motion of described the 4th micro-switch 216 of described four-cam 206 controls, produce neutral position electric signal, give computing machine by circuit with neutrality position electric signal transmission then, control slave locomotive by computing machine according to described neutral position electric signal then.
When pressing down handgrip, driving single slow feeler lever 207 moves downward, control the switch motion of the 5th micro-switch 217, produce single slow position electric signal, should single slow position electric signal transmission give computing machine by circuit then, carry out synchronous action by computing machine according to the slow position of described list electric signal control slave locomotive and master control locomotive again.
In above-mentioned using method, for first cam and the 3rd action of cam, also can exchange use, promptly control first micro-switch generation retarder location signal at retarder location and pass to computing machine by first cam, produce an alleviation signal by the 3rd cam at alleviation position control the 3rd micro-switch and pass to computing machine, the function of other two cams is constant, so also can realize restriction of the present invention.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined herein General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (6)
1. an air brake valve for locomotive is characterized in that, comprise cam case, with cam case one side bonded assembly valve body, be installed in the exhaust valve of described cam case bottom;
The handgrip axle is installed in described cam case, push rod is arranged, outside described handgrip axle, be set with first cam, second cam, the 3rd cam and four-cam from top to bottom successively at the central mounting of described handgrip axle;
In described valve body with on the corresponding position of described first cam, the conversion plunger is installed, be reserved with preset distance between described conversion plunger and described first cam, in described valve body, also be equipped with by the position ram of described second cam-controlled, by the effect plunger of described four-cam control;
Described air brake valve for locomotive also comprises the interlocking switch group, and described interlocking switch group comprises by first micro-switch of described first cam-controlled, by second micro-switch of described second cam-controlled, by the 3rd micro-switch of described the 3rd cam-controlled, by the 4th micro-switch of described four-cam control.
2. air brake valve for locomotive according to claim 1 is characterized in that, is equipped with below described exhaust valve and the slow feeler lever of described push rod bottom bonded assembly list, and described interlocking switch group also comprises the 5th micro-switch by the slow feeler lever control of described list.
3. the using method of the described air brake valve for locomotive of claim 1 comprises:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, alleviating described first micro-switch generation of control alleviation position electric signal transmission to computing machine by described first cam, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, control described the 3rd micro-switch by described the 3rd cam at retarder location and produce the retarder location electric signal transmission, produce neutrality position electric signal transmission by described four-cam at described the 4th micro-switch of neutral position control and give described computing machine to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive.
4. the using method of the described air brake valve for locomotive of claim 1 comprises:
The rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, control described first micro-switch by described first cam at retarder location and produce the retarder location electric signal transmission to computing machine, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, alleviating described the 3rd micro-switch generation of control alleviation position electric signal transmission to described computing machine by described the 3rd cam, controlling described the 4th micro-switch by described four-cam at neutral and produce neutrality position electric signal transmission to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive.
5. the using method of the described air brake valve for locomotive of claim 2, comprise: the rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, alleviating described first micro-switch generation of control alleviation position electric signal transmission to computing machine by described first cam, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, control described the 3rd micro-switch by described the 3rd cam at retarder location and produce the retarder location electric signal transmission, produce neutrality position electric signal transmission by described four-cam at described the 4th micro-switch of neutral position control and give described computing machine to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive;
Press down handgrip, the slow signal of the list that described the 5th micro-switch will produce passes to described computing machine, and described computing machine is according to the slow signal control slave locomotive of described list.
6. the using method of the described air brake valve for locomotive of claim 2, comprise: the rotary handle axle makes air brake valve for locomotive be in the alleviation position successively, driving position, neutral position and retarder location, control described first micro-switch by described first cam at retarder location and produce the retarder location electric signal transmission to computing machine, control described second micro-switch by described second cam at driving position and produce the driving position electric signal transmission to described computing machine, alleviating described the 3rd micro-switch generation of control alleviation position electric signal transmission to described computing machine by described the 3rd cam, controlling described the 4th micro-switch by described four-cam at neutral and produce neutrality position electric signal transmission to described computing machine;
Described computing machine is according to described alleviation position electric signal, driving position electric signal, neutral position electric signal and retarder location electric signal control slave locomotive;
Press down handgrip, the slow signal of the list that described the 5th micro-switch will produce passes to described computing machine, and described computing machine is according to the slow signal control slave locomotive of described list.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101248735A CN101774375B (en) | 2010-03-12 | 2010-03-12 | Air brake valve for locomotive and use method thereof |
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| CN2010101248735A CN101774375B (en) | 2010-03-12 | 2010-03-12 | Air brake valve for locomotive and use method thereof |
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| CN101774375A CN101774375A (en) | 2010-07-14 |
| CN101774375B true CN101774375B (en) | 2011-11-30 |
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| CN2010101248735A Active CN101774375B (en) | 2010-03-12 | 2010-03-12 | Air brake valve for locomotive and use method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102371989B (en) * | 2010-08-13 | 2014-04-02 | 中国北车集团大同电力机车有限责任公司 | Emergency brake valve for electric locomotive |
| CN102673550A (en) * | 2012-05-24 | 2012-09-19 | 上海神舟汽车节能环保有限公司 | Automobile air brake valve with electronic switch |
| CN104477204B (en) * | 2015-01-05 | 2018-01-19 | 南车株洲电力机车有限公司 | A kind of handle integration system movement controller, brake control method and system |
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| GB1602711A (en) * | 1977-10-29 | 1981-11-18 | Wabco Fahrzeugbremsen Gmbh | Motor-vehicle brake valve with control means for an auxiliary brake |
| US5964449A (en) * | 1998-04-29 | 1999-10-12 | Westinghouse Air Brake Company | Brake valve latch with enhanced lubricity |
| CN201334003Y (en) * | 2008-11-29 | 2009-10-28 | 兰州金牛轨道交通装备有限责任公司 | Electric-locomotive air brake equipment |
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- 2010-03-12 CN CN2010101248735A patent/CN101774375B/en active Active
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|---|---|---|---|---|
| GB1602711A (en) * | 1977-10-29 | 1981-11-18 | Wabco Fahrzeugbremsen Gmbh | Motor-vehicle brake valve with control means for an auxiliary brake |
| US5964449A (en) * | 1998-04-29 | 1999-10-12 | Westinghouse Air Brake Company | Brake valve latch with enhanced lubricity |
| CN201334003Y (en) * | 2008-11-29 | 2009-10-28 | 兰州金牛轨道交通装备有限责任公司 | Electric-locomotive air brake equipment |
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| 张斌.JZ-7型制动机断钩保护问题探讨.《内燃机车》.2009,(第4期), * |
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