CN102358281B - Parking braking protection system - Google Patents

Parking braking protection system Download PDF

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Publication number
CN102358281B
CN102358281B CN 201110220817 CN201110220817A CN102358281B CN 102358281 B CN102358281 B CN 102358281B CN 201110220817 CN201110220817 CN 201110220817 CN 201110220817 A CN201110220817 A CN 201110220817A CN 102358281 B CN102358281 B CN 102358281B
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China
Prior art keywords
valve
braking during
during standstill
change
over valve
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CN 201110220817
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CN102358281A (en
Inventor
张亮
苑兴然
董世安
陈海库
商飞
吴林林
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Hebei Mechanical & Electrical Technology Co., Ltd.
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Shijiazhuang Zhongmei Coal Mine Equipment Manufacture Co Ltd
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Priority to CN 201110220817 priority Critical patent/CN102358281B/en
Publication of CN102358281A publication Critical patent/CN102358281A/en
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Abstract

The invention provides a parking braking protection system, which comprises a parking brake valve, a pressure pump, an oil tank, parking brakes and an air-operated hydraulic directional control valve, wherein an air inlet a of the parking brake valve is connected with an air source, and an air outlet of the parking brake valve is connected with the parking brakes and a control port of the air-operated hydraulic directional control valve by a pipeline; an air vent is communicated with the atmosphere; the air outlet is connected with a control port by a pipeline with a throttle valve; and an inlet of the pressure pump is connected with the oil tank, and an outlet of the pressure pump is connected with the parking brakes and a normally closed valve position interface of the air-operated hydraulic directional control valve. By the technical scheme provided by the invention, the occurrence of vehicle slipping can be effectively avoided, the safety of a vehicle and a driver/passengers is protected and the safe production of an underground transport vehicle can be ensured.

Description

The braking during standstill protection system
Technical field
The present invention relates to mining rubber tire transport trolley field, more specifically, relate to a kind of mining railless free-wheeled vehicle emergency braking and braking during standstill protection system.
Background technology
The explosion-proof railless free-wheeled vehicle of present mining diesel engine is applied to material and personnel's transportation in large-scale colliery, because the coal mine roadway space is narrow and small, and mostly is domatic.In order to guarantee vehicle and personnel's safety, the actv. emergency brake system particular importance that seems.Existing mining diesel engine railless free-wheeled vehicle adopts the stopping brake valve through row braking protection; in the production process of reality; often occur forgetting after chaufeur is got off pulling the hand brake and not implementing stopping brake, cause vehicle that sloping event takes place to slip, cause injury to personnel, damaged vehicle accident.
Therefore, need a kind of braking during standstill protection system, during with the operator's compartment car door opening, open emergency brake system at chaufeur automatically, avoid vehicle that sloping accident takes place to slip, protection vehicle and personnel's safety.
Summary of the invention
Forget and pull the hand brake and make vehicle that sloping accident take place to slip in order to solve in the above-mentioned prior art problem chaufeur; cause casualties and technical matters such as damaged vehicle or one of at least; the invention provides a kind of braking during standstill protection system, can effectively overcome the above-mentioned defective of prior art.
The invention provides a kind of braking during standstill protection system; comprise braking during standstill valve 1; force (forcing) pump 2; fuel tank 3; Parking Brake 4; Pneumatic and hydraulic change-over valve 5; the admission port a of described braking during standstill valve 1 connects source of the gas; air extractor duct c connects the control mouth 5d of described force (forcing) pump 2 and described Pneumatic and hydraulic change-over valve 5 by pipeline; exhausr port b leads to atmosphere; described air extractor duct c is connected by the pipeline of band flow regulating valve 7 with control mouthful d; the import of described force (forcing) pump 2 is connected with described fuel tank 3; outlet is connected with the normally closed valve position interface 5a of described Parking Brake 4 and described Pneumatic and hydraulic change-over valve 5 by pipeline, and the outlet 5c of described Pneumatic and hydraulic change-over valve 5 is connected with described fuel tank 3.During driving, pull up the button of described braking during standstill valve 1, described admission port a and described air extractor duct c connect, the pressure gas compression spring at described control mouthful d place, keep described braking during standstill valve 1 and be in the described position that pulls up, the described force (forcing) pump 2 of the compressed gas-driven of described air extractor duct c will be delivered to described Parking Brake 4 after the pressurization of the hydraulic oil in the described fuel tank 3, described Parking Brake 4 unclamps axletree 6, the braking of freeing vehicle; During parking, press described braking during standstill valve 1, described air extractor duct c and exhausr port b connect and release, then described force (forcing) pump 2 quits work, and described Pneumatic and hydraulic change-over valve 5 resets under the effect of spring, hydraulic oil flows back to described fuel tank 3 by described Pneumatic and hydraulic change-over valve 5, and described Parking Brake 4 is held described axletree 6 tightly under the reset response of spring, carry out braking during standstill.
Preferably, also comprise the described hand change over valve of controlling between mouthful 5d 8 that is arranged on described braking during standstill valve 1 described air extractor duct c and described Pneumatic and hydraulic change-over valve 5.Press described hand change over valve 8 handles, the pressurized air of the described control mouthful 5d of described Pneumatic and hydraulic change-over valve 5 is discharged into the atmosphere by the position, a left side of described hand change over valve 8, be back to described fuel tank 3 through the hydraulic oil after described booster pump 2 pressurizations through described Pneumatic and hydraulic change-over valve 5, described Parking Brake 4 releases are also held described axletree 6 tightly under the reset response of spring, carry out braking during standstill.
Preferably, comprise also and the described mouthful roller change-over valve 9 of d connection of controlling of described braking during standstill valve 1 that an end of described roller change-over valve 9 is provided with spring, the other end connects the car door axle of operator's compartment, when described operator's compartment car door is opened, described roller change-over valve 9 right position work.The described mouthful pressure gas at d place of controlling of described braking during standstill valve 1 is discharged into the atmosphere by described roller change-over valve 9, under the effect of spring, the described air extractor duct c of described braking during standstill valve 1 and described exhausr port b UNICOM, described Parking Brake 4 releases are also held axletree 6 tightly under the reset response of spring, carry out braking during standstill.
Preferably, also comprise the emergency brake valve of connecting with the control mouth d of described braking during standstill valve 1 10, described emergency brake valve 10 is arranged on the rear portion of car body or is arranged on objective railway carriage or compartment, when the passenger finds that abnormal condition appear in vehicle, press the button of described emergency brake valve 10, described emergency brake valve 10 right position work.The pressure gas at described control mouthful d place is discharged into the atmosphere by the right position of emergency brake valve 10, under the effect of spring, the described air extractor duct c of described braking during standstill valve 1 and described exhausr port b UNICOM, described Parking Brake 4 releases are also held axletree tightly under the reset response of spring, carry out braking during standstill.
Preferably, also comprise the pilot operated directional control valve of connecting with the control mouth d of described braking during standstill valve 1 11, the machine oil hydraulic pipeline of a termination driving engine of described pilot operated directional control valve 11, the other end is spring.When described machine oil hydraulic is lower than operation pressure, described pilot operated directional control valve 11 is in the work of the effect bottom left position of described spring, the pressure gas at described control mouthful d place is discharged into the atmosphere by described pilot operated directional control valve 11, under the effect of spring, the described air extractor duct c of described braking during standstill valve 1 and described exhausr port b UNICOM, described Parking Brake 4 releases are also held axletree tightly under the reset response of spring, carry out braking during standstill.
Preferably, hand change over valve 8, roller change-over valve 9, emergency brake valve 10 and pilot operated directional control valve 11 can be according to the control needs in twos or 33 or be arranged on simultaneously in the described braking during standstill protection system.
Preferably, described braking during standstill valve 1, hand change over valve 8, roller change-over valve 9, emergency brake valve 10, pilot operated directional control valve 11 are two position three-way valve.
Preferably, also comprise Parking Brake oil pressure indicator 12.
Preferably, described Parking Brake 4 is installed on the back axle of vehicle.
By braking during standstill protection system provided by the invention, can effectively avoid mining transport trolley that sloping event takes place to slip, when chaufeur is opened the operator's compartment car door, forget as chaufeur to pull the hand brake, then implement braking during standstill automatically, protection vehicle and personnel's safety.The present invention simultaneously also provides braking during standstill in emergency circumstances, when vehicle is caused danger situation, by implementing braking during standstill by emergency stop button, protection vehicle and personnel's safety.
Description of drawings
Fig. 1 shows first embodiment according to braking during standstill protection system of the present invention;
Fig. 2 shows second embodiment according to braking during standstill protection system of the present invention;
Fig. 3 shows the 3rd embodiment according to braking during standstill protection system of the present invention;
Fig. 4 shows the 4th embodiment according to braking during standstill protection system of the present invention;
Fig. 5 shows the 5th embodiment according to braking during standstill protection system of the present invention;
Fig. 6 shows the 6th embodiment according to braking during standstill protection system of the present invention;
Fig. 7 shows the scheme drawing of the releasing braking during standstill of system shown in Figure 6.
The specific embodiment
Below in conjunction with description of drawings according to the specific embodiment of the present invention.
Set forth a lot of details in the following description so that fully understand the present invention, still, the present invention can also adopt other to be different from other modes described here and implement, and therefore, the present invention is not limited to the restriction of following public specific embodiment.
Fig. 1 shows first embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 1; A is source of the gas; the arrow direction is airintake direction; braking during standstill protection system provided by the invention; comprise braking during standstill valve 1; force (forcing) pump 2; fuel tank 3; Parking Brake 4; Pneumatic and hydraulic change-over valve 5; the admission port a of described braking during standstill valve 1 connects source of the gas; air extractor duct c connects the control mouth 5d of described force (forcing) pump 2 and described Pneumatic and hydraulic change-over valve 5 by pipeline; exhausr port b leads to atmosphere; described air extractor duct c is connected by flow regulating valve 7 with a control mouthful d; be provided with described force (forcing) pump 2 between described air extractor duct c and the described Parking Brake 4; the import of described force (forcing) pump 2 is connected with described fuel tank 3; outlet is connected with the normally closed valve position interface 5a of described Parking Brake 4 and described Pneumatic and hydraulic change-over valve 5 by pipeline, and the outlet 5c of described Pneumatic and hydraulic change-over valve 5 is connected with described fuel tank 3.During driving, pull up the button of described braking during standstill valve 1, described admission port a and described air extractor duct c connect, the pressure gas compression spring at described control mouthful d place, keep described braking during standstill valve 1 and be in the described position that pulls up, the described force (forcing) pump 2 of the compressed gas-driven of described air extractor duct c will be delivered to described Parking Brake 4 after the pressurization of the hydraulic oil in the described fuel tank 3, described Parking Brake 4 unclamps axletree 6, the braking of freeing vehicle; During parking, press described braking during standstill valve 1, hydraulic oil is by 5 times described fuel tanks 3 of described Pneumatic and hydraulic change-over valve, and described Parking Brake 4 is held described axletree 6 tightly under the reset response of spring, carry out braking during standstill.
Figure 1 shows that the scheme drawing of the state of removing braking during standstill, braking during standstill valve 1 is pulled out, the pressure gas of air source A is by admission port a, air extractor duct c enters system, air extractor duct c is connected by the pipeline that contains flow regulating valve 7 with a control mouthful d, the spring of the pressure gas compression braking during standstill valve 1 of control mouthful d, make braking during standstill valve 1 keep the position of extracting, the other end of air extractor duct c is with compressed gas-driven force (forcing) pump 2, force (forcing) pump 2 is delivered to the hydraulic oil in the fuel tank 3 in the hydraulic actuating cylinder of Parking Brake 4, the compression spring, the contact vehicle braked, if braking during standstill valve 1 is pressed, then pressure gas drains into the atmosphere from exhausr port b, Pneumatic and hydraulic change-over valve 5 does not have keeping of pressure gas, hydraulic oil through pressurization is back in the fuel tank 3, and Parking Brake 4 is held axletree 6 tightly, and vehicle enters the braking during standstill state.
Fig. 2 shows second embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 2, be the braking during standstill state, second embodiment of the present invention, its structure and structure shown in Figure 1 are basic identical, and difference is:
Be provided with hand change over valve 8 in the upper end of described Pneumatic and hydraulic change-over valve 5.Described hand change over valve 8, can verify whether braking during standstill is normal, press the button of described hand change over valve 8,8 left side position work of described hand change over valve, two interface 8a, 8c of described hand change over valve 8 disconnect, then the pressurized air of the admission port 5d of Pneumatic and hydraulic change-over valve 5 discharges by the position, a left side of hand change over valve 8, two interface 5a, 5c of Pneumatic and hydraulic change-over valve communicate, pass through described Pneumatic and hydraulic change-over valve 5 oil sump tanks 3 through the hydraulic oil after force (forcing) pump 2 pressurizations, rear-axle parking brake 4 is held axletree 6, stopping brake tightly under the effect of spring.If after pressing hand change over valve 8, vehicle enters the braking during standstill state, illustrates that emergency brake system is normal, if can not in time enter the braking during standstill state, illustrate that then emergency brake system pipeline or the pump housing have fault, need maintain.
Pipeline at described Parking Brake 4 is connected to Parking Brake oil pressure indicator 12.Can show the oil pressure in the Parking Brake 4 in real time, prevent the accident that oil pressure is too high or oil pressure is not enough.
Fig. 3 shows the 3rd embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 3, be the state of the braking during standstill protection of opening the door, the 3rd embodiment of the present invention, its structure and structure shown in Figure 2 are basic identical, and difference is:
Control mouth d at described braking during standstill valve 1 is connected to roller change-over valve 9, and described roller change-over valve 9 has two, is arranged on the car door place, the left and right sides of operator's compartment, also can arrange to adjust according to concrete number and the structure of operator's compartment car door.The admission port 9a of described roller change-over valve 9 links to each other with described control mouth d, one end of described roller change-over valve 9 is provided with spring, the other end connects the car door axle of operator's compartment, when described operator's compartment car door is opened, described roller change-over valve 9 is discharged into the atmosphere the pressurized air at described control mouthful d place two interface 9a, 9c by roller change-over valve 9, described Parking Brake 4 is held axletree tightly under the reset response of described compression spring, carry out braking during standstill.
Fig. 3 shows at the parking back chaufeur that travels and has forgotten the situation of pressing braking during standstill valve 1 and opening the door and get off, when the operator's compartment car door is opened, roller change-over valve 9 is in the work of the effect bottom left position of retracing spring, this moment, the pressurized air of d mouth was discharged into the atmosphere by the position, a left side of roller change-over valve 9, pressurized air can not be very fast under the throttling action of flow regulating valve 7 the additional pressurized air that discharges, then discharge into the atmosphere in braking during standstill valve 1 right position, booster pump 2 quits work, the 5 the next work of Pneumatic and hydraulic change-over valve, two interface 5a of Pneumatic and hydraulic change-over valve, 5c connects, pass through this valve oil sump tank 3 through the hydraulic oil after booster pump 2 pressurizations, then rear-axle parking brake 4 is held axletree 6 tightly under the effect of spring, carries out braking during standstill.
Fig. 4 shows the 4th embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 4, be urgent braking during standstill guard mode, the 4th embodiment of braking during standstill protection system of the present invention, its structure and structure shown in Figure 2 are basic identical, and its difference is:
Control mouth d at described braking during standstill valve 1 is connected with emergency brake valve 10, described emergency brake valve 10 is arranged on the rear portion of car body or is arranged on objective railway carriage or compartment, when the passenger finds that abnormal condition appear in vehicle, press the button of described emergency brake valve 10, described emergency brake valve 10 right position work, the pressure gas at described control mouthful d place is released in the atmosphere, the additional pressurized air that discharges that can not be very fast under the throttling action of flow regulating valve 7, then discharge into the atmosphere in braking during standstill valve 1 right position, booster pump 2 quits work, the 5 the next work of Pneumatic and hydraulic change-over valve, two interface 5a of Pneumatic and hydraulic change-over valve 5,5c connects, by this valve oil sump tank 3, then rear-axle parking brake 4 is held axletree 6 tightly under the effect of spring, carries out braking during standstill through the hydraulic oil after booster pump 2 pressurizations.
Emergency brake valve 10 is provided with two interface 10a, 10c, during normal vehicle operation, an interface 10a of described emergency brake valve is obstructed, another interface 10c sealing, when being in an emergency, press the button of emergency brake valve 10, the pressurized air that emergency brake valve 10 right position work will be controlled mouthful d is discharged in the atmosphere, and vehicle enters the braking during standstill state.
Like this, when the passenger finds that vehicle is in error state, also can implement braking during standstill to vehicle, protection vehicle and personnel's safety.
Fig. 5 shows the 5th embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 5, for machine oil hydraulic is crossed braking during standstill guard mode when low, the 5th embodiment of the present invention, its structure and structure shown in Figure 2 are basic identical, and difference is:
Control mouth d place at described braking during standstill valve 1 connects pilot operated directional control valve 11, the machine oil hydraulic pipeline of one termination driving engine of described pilot operated directional control valve 11, another termination spring, when described machine oil hydraulic is lower than operation pressure, described pilot operated directional control valve 11 is under the effect of spring, discharge into the atmosphere controlling interface 11b, the 11c of mouthful pressure gas at d place by pilot operated directional control valve, described Parking Brake 4 is held axletree tightly under the reset response of described compression spring, carry out braking during standstill.
Like this, can when engine motor oil is not enough, for vehicle carries out braking during standstill, effectively avoid the generation of accident automatically, protection vehicle and personnel's safety.
Fig. 6 shows the 6th embodiment according to braking during standstill protection system of the present invention.
As shown in Figure 6, be the braking during standstill state, its structure and structure shown in Figure 2 are basic identical, and its difference is: described hand change over valve 8, roller change-over valve 9, emergency brake valve 10 and described pilot operated directional control valve 11 are arranged on simultaneously on the described car body and use.
Preferably, described hand change over valve 8, roller change-over valve 9, emergency brake valve 10 and pilot operated directional control valve 11 can be according to the control needs in twos or 33 or be arranged on simultaneously in the described braking during standstill protection system
Shown in Figure 6, be described hand change over valve 8, roller change-over valve 9, emergency brake valve 10 and described pilot operated directional control valve 11 are arranged on the described car body when using not starting state of vehicle simultaneously, vehicle is in braking during standstill, at this moment, operator's compartment is in the state of closing the door, the admission port 9a of roller change-over valve 9 closes, braking during standstill hand valve 1 is pressed, admission port a closes, driving engine is in not mode of operation, so engine oil pressure is normal atmosphere (An), two interface 11b of pilot operated directional control valve 11,11c is communicated with, and leads to atmosphere, two interface 5a of Pneumatic and hydraulic change-over valve 5,5c is communicated with, through the hydraulic oil oil sump tank 3 that force (forcing) pump 2 pressurizeed, Parking Brake 4 is held axletree 6 tightly under the reset response of spring, carry out braking during standstill.
In system shown in Figure 6, any one valve in roller change-over valve 9, hand change over valve 8, emergency brake valve 10, the pilot operated directional control valve 11 can carry out braking during standstill to system, also can work simultaneously, and system is carried out braking during standstill.
Fig. 7 shows the scheme drawing of the releasing braking during standstill of system shown in Figure 5.
As shown in Figure 7, during for driving, close the operator's compartment car door, the admission port 9a of roller change-over valve 9 closes, pull up braking during standstill valve 1, admission port a and air extractor duct c are communicated with, source of the gas is system's voltage supply contracting gas, air extractor duct c and control mouthful d are communicated with, and keep braking during standstill valve 1 and are in and pull up the position, start the engine, machine oil hydraulic rises, the admission port 11b of pilot operated directional control valve 11 is blocked, and compressed gas-driven force (forcing) pump 2 is delivered to Parking Brake 4 after the hydraulic oil in the fuel tank 3 is pressurizeed, and removes braking during standstill, Pneumatic and hydraulic change-over valve 5 is in upper work under the effect of pressure gas, two interface 5a of Pneumatic and hydraulic change-over valve 5,5c is in the partition state, and hydraulic oil can not be from the interface 5a of Pneumatic and hydraulic change-over valve, the 5c oil sump tank guarantees to remove braking during standstill.
Further, in the various embodiments described above, described braking during standstill valve 1, hand change over valve 8, roller change-over valve 9, emergency brake valve 10, pilot operated directional control valve 11 are two position three-way valve.
Described braking during standstill protection system also comprises Parking Brake oil pressure indicator 12, understands the pressure condition of hydraulic braking system at any time.
Described Parking Brake 4 is installed on the back axle of vehicle, brakes more firm, more steady
It should be appreciated by those skilled in the art; emergency braking function of the present invention, the braking during standstill defencive function that opens the door, the automatic function of implementing braking during standstill when hydraulic oil is not enough; all be to realize in the external triggering control cock of the control mouth of braking during standstill valve 1, as connect emergency brake valve, roller change-over valve, pilot operated directional control valve and wait to realize automatic parking brake.Other states of vehicle such as engine off, blow out, the Low oil Fuel condition of waiting for bus in the fuel tank; all can adopt corresponding sensor to know; and realize braking during standstill by the control mouth that corresponding control cock is connected on braking during standstill valve 1; protection vehicle and personnel's safety; every employing braking during standstill valve of the present invention is realized the method and apparatus of various automatic parking brakes, all should be included within protection scope of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (9)

1. braking during standstill protection system; it is characterized in that; comprise braking during standstill valve (1); force (forcing) pump (2); fuel tank (3); Parking Brake (4); Pneumatic and hydraulic change-over valve (5); the admission port (a) of described braking during standstill valve (1) connects source of the gas; air extractor duct (c) connects the control mouth (5d) of described force (forcing) pump (2) and described Pneumatic and hydraulic change-over valve (5) by pipeline; exhausr port (b) leads to atmosphere; described air extractor duct (c) is connected with the pipeline of control mouthful (d) by band flow regulating valve (7); the import of described force (forcing) pump (2) is connected with described fuel tank (3); outlet is connected by the normally closed valve position interface (5a) of pipeline with described Parking Brake (4) and described Pneumatic and hydraulic change-over valve (5), and the outlet (5c) of described Pneumatic and hydraulic change-over valve (5) is connected with described fuel tank (3).
2. braking during standstill protection system according to claim 1; it is characterized in that, also comprise the hand change over valve (8) between the described control mouthful (5d) that is arranged on the described air extractor duct of described braking during standstill valve (1) (c) and described Pneumatic and hydraulic change-over valve (5).
3. braking during standstill protection system according to claim 2; it is characterized in that; also comprise the roller change-over valve of connecting with the described control mouthful (d) of described braking during standstill valve (1) (9); one end of described roller change-over valve (9) is provided with spring; the other end connects the car door axle of operator's compartment; when described operator's compartment car door is opened, described roller change-over valve (9) right position work.
4. braking during standstill protection system according to claim 3; it is characterized in that; also comprise the emergency brake valve of connecting with the control mouth (d) of described braking during standstill valve (1) (10); described emergency brake valve (10) is arranged on the rear portion of car body or is arranged on objective railway carriage or compartment; when the passenger finds that abnormal condition appear in vehicle; press the button of described emergency brake valve (10), carry out braking during standstill.
5. braking during standstill protection system according to claim 4; it is characterized in that; also comprise the pilot operated directional control valve of connecting with the control mouth (d) of described braking during standstill valve (1) (11), the machine oil hydraulic pipeline of a termination driving engine of described pilot operated directional control valve (11), the other end is spring.
6. braking during standstill protection system according to claim 5; it is characterized in that; described hand change over valve (8), roller change-over valve (9), emergency brake valve (10) and pilot operated directional control valve (11) can be according to the control needs in twos or 33 or be arranged on simultaneously in the described braking during standstill protection system.
7. braking during standstill protection system according to claim 6 is characterized in that, described braking during standstill valve (1), hand change over valve (8), roller change-over valve (9), emergency brake valve (10), pilot operated directional control valve (11) are two position three-way valve.
8. braking during standstill protection system according to claim 7 is characterized in that, also comprises Parking Brake oil pressure indicator (12).
9. braking during standstill protection system according to claim 8 is characterized in that, described Parking Brake (4) is installed on the back axle of vehicle.
CN 201110220817 2011-08-03 2011-08-03 Parking braking protection system Active CN102358281B (en)

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CN102358281B true CN102358281B (en) 2013-08-21

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CN103879394B (en) * 2014-03-28 2016-04-20 常州科研试制中心有限公司 The parking brake system of underground mine use towed vehicle
CN103935350B (en) * 2014-04-15 2017-02-01 三一重型装备有限公司 Gas-liquid composite braking structure and mining mechanical vehicle
CN104325969B (en) * 2014-10-09 2017-04-19 浙江万向精工有限公司 Brake-by-wire assisted parking device and realization method
CN105216772B (en) * 2015-10-23 2017-11-03 湖南晟通天力汽车有限公司 Parking and handling interlock system
CN105774775A (en) * 2016-04-28 2016-07-20 朱明德 Vehicle door opening and parking brake control device
CN108297627A (en) * 2017-01-11 2018-07-20 比亚迪股份有限公司 Automobile flat tire is met an urgent need protective device, tire and automobile
CN107972650B (en) * 2017-08-04 2020-07-03 中国煤炭科工集团太原研究院有限公司 Hydraulic-pneumatic composite braking system with door protection for explosion-proof rubber-tyred vehicle
CN110843743A (en) * 2017-11-07 2020-02-28 金福珍 Working method of trailer
CN109017732A (en) * 2018-08-25 2018-12-18 刘剑 The stop device of vehicle

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