CN203727347U - Pneumatic hook flexible arresting device of trackless transport vehicle - Google Patents
Pneumatic hook flexible arresting device of trackless transport vehicle Download PDFInfo
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- CN203727347U CN203727347U CN201320870598.0U CN201320870598U CN203727347U CN 203727347 U CN203727347 U CN 203727347U CN 201320870598 U CN201320870598 U CN 201320870598U CN 203727347 U CN203727347 U CN 203727347U
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- trackless transport
- transport trolley
- connecting arm
- arresting gear
- stretching force
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- 206010000372 Accident at work Diseases 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
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- 238000007598 dipping method Methods 0.000 description 4
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- 239000010959 steel Substances 0.000 description 4
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Abstract
The utility model discloses a flexible arresting gear of pneumatic hook that falls of trolley-bus transport vechicle, it includes: a plurality of sets of blocking structures are arranged on the roadway bottom plate at intervals; the lifting stretching stress structure is arranged at the bottom of the body of the trackless transport vehicle and is provided with a hook used for hooking the arresting structure. Wherein, tensile atress structure still includes: the tail end of the connecting arm is fixedly connected with the hook-shaped object; and the telescopic piece is arranged on the upper surface of the connecting arm and used for lifting the connecting arm. The utility model discloses a arresting device, simple structure, installation, convenient to use can make the flexible braking of trackless transport vechicle that takes place the sports car accident to avoid the emergence of major safety in production accident.
Description
Technical field
The utility model belongs to mining equipment technology type mechanical manufacturing engineering field, is a kind of backup type fender guard as colliery underground trackless transport systems motor vehicle braking system.
Background technology
Trackless transport systems is to produce Stady On The Auxiliary Transportation Systems with respect to a kind of New Mine of mine rail mounted transport system, trackless transport trolley can directly transport personnel, material and equipment from ground to exploiting field, is specially adapted to the flat seam mine that ocurrence of coal seam is shallow, roof and floor condition is good, inclination angle is little.In Shanxi, the ground such as Shaanxi, Inner Mongol, trackless transport has good development prospect, Mining in Datong Mining Administration has introduced the transporting bracket car of Australian Nuo Yisi company and the high-mobility, multipurpose, wheeled vehicle forklift of company of Eem section of Britain at the mid-80; At the initial stage nineties, Lu'an Bureau of Mine has been introduced company of Eem section of Britain 880 type trackless transpories trolley; The mid-90, the 913HLD of company of Eem section of Britain type trackless rubber tire forklift and people's car have been introduced in the great Liu of Shen Dong company tower ore deposit and live chickens rabbit ore deposit, make mining assistant conveyance system realize tracklessization transport; In the latter stage nineties, Yanzhou Mining Group has also introduced 15 railless free-wheeled vehicles from external at three collieries of helping, and has successfully solved this ore deposit vertical and use a difficult problem for rubber-tired cart, for China's vertical exploitation is used rubber-tired cart to set up a successful model.
The vehicle brake technology of trackless transport systems mainly adopts all-hydraulic control loop, is generally furnished with two cover brake equipments: a set of is service braking device, and the multi-disk wet brake that adopts drive axle itself to install, uses stretcher control; Another set of is parking/emergency braking apparatus, adopts safety-type multi-disk wet brake, in aggregates with the input shaft shape of rear driving axle, uses hydraulic valve remote handing, during for vehicle stop or hill start.But this technology is excessive to the stability dependency of hydraulic control circuit, in the time that riving condition variation is excessive, too fast, the pressure of hydraulic circuit just has large fluctuation, in the time of hydraulic tubing defectiveness, may cause that release causes brake failure.On the other hand, domestic explosion-proof power plant productive capacity is relatively backward, the most power of rubber-tired cart of domestic development is less than normal, drive often taking explosion-proof low pollution diesel engine as main, the production standard of vehicle is many with reference to external professional standard, cause vehicle performance, explosion-resistance characteristic, deceleration and stopping performance, the aspect hysteresis imported vehicles such as production link, and, trackless transport systems In Modern Mine carry out on a large scale application in, due to mine production environment, tunnel tilt condition, base plate geology stability state, the impact of the factors such as roadway hydrogeology, cause the brake equipment load of trackless transport systems excessive.Also have, the vehicle maintenance of colliery trackless transport systems by ore deposit power on pincers worker be responsible for, but the structure of most of electric pincers worker to trackless transport vehicle and the operation logic of each unit are had half knowledge, and cause service technique relatively backward, thereby may people cause certain potential safety hazard in the time of car inspection and maintenance.
So trackless transport systems is that coal production has also been brought major hidden danger when bringing great benefit.It is reported, 2011 enter board self-unloading farm car enters well, while walking to Dong Fuyun great Xiang Lian lane and corner, Dong Fuyun great lane, knocks wall, causes 6 people's death, 8 people injured, approximately 9,320,000 yuan of direct economic losses.Through investigation, the immediate cause of accident is that non-explosion-proof non-manned farm vehicle that this ore deposit Misuse transports material transports personnel and enters well, and motor vehicle braking system, steering swivel system etc. all do not meet the provisions of the relevant regulations issued by the State, during in tunnel, length is travelled apart from descending (1570 meters), vehicle operating is improper, drive over the speed limit, and knocks wall.On October 29th, 2011, in tunnel, Lintao County domestic Lan Yu Railway Black Hills, Dingxi City, Gansu Province, the light-duty truck that one operation team of unit in charge of construction is rented 1 person ownership transports 28 operating personnel's workings, in the time walking to 500 meters of of inclined shaft, Lv Jia beach, tunnel, Black Hills, car brakeing is malfunctioning suddenly, and more than 800 meter of continuous slide gone out inclined shaft, turns on one's side after hitting tunnel side wall, cause 24 people's death, 4 people injured, 2133.99 ten thousand yuan of direct economic losses.Through investigation, the immediate cause of accident is that vehicle driver drives the undesirable self-propelled vehicle of braking, in the larger descending section fast running of the gradient, after car brakeing is malfunctioning, is dying to take measures improper, causes overturning.On May 17th, 2013, the high kiln colliery subincline trackless transport trolley generation derailing accident of Northern United Power Co., Ltd. of China Huaneng Group, causes 1 people's death, and accident is named as shipping accident.
The Yan Bei colliery quick walkway of two levels is the special pedestrian inclined gallery from constructing in coal 5 floor between No. 7 connection roadways of 106 parking lot to two level, tunnel total length 3460m, the gradient is 0 ° 0 ' 18 "～9 ° 24 ' 01 ", turning outside radius is 20m, dash amount is 850m3/min.Because roadway gradient is large, inclined gallery long (gradient more than 9 ° is greater than 1000m in tunnel, and the gradient more than 6 ° is greater than 1700m in tunnel), roadway floor road surface is wet and slippery, and while causing vehicle operating, brake system load is large, and vehicle safety operation does not hold good security.
Summary of the invention
The purpose of this utility model is exactly in order to address the above problem, provide the pneumatic off the hook of a kind of trackless transport trolley flexible arresting gear, it is simple in structure, installation, easy to use, can make to occur the trackless transport trolley flexible braking of derailing accident, thereby avoid the generation of major industrial accident.
For realizing above-mentioned purpose of the present utility model, the flexible arresting gear of the pneumatic off the hook of trackless transport trolley of the present utility model comprises: the many covers that are disposed on roadway floor block structure; Be arranged on the liftable stretching force structure of trackless transport vehicle body bottom, described stretching force structure has the uncinus for blocking structure described in hooking.
Wherein, described stretching force structure also comprises: the connecting arm hinged with the car body crossbeam of described trackless transport trolley, and its end is fixedly connected with described uncinus; Be arranged on connecting arm upper surface for making the extensible member of its lifting.
Preferably, described extensible member is Pneumatic extension bar or hydraulically extensible bar or electric expansion bar, and it is connected with the pneumatic shuttle of described trackless transport trolley or hydraulic efficiency gear or electric device.
Wherein, described stretching force structure also comprises: the first traction piece of described connecting arm front end is fixed in its one end, and its other end is fixed on the axletree of rear wheel of described trackless transport trolley.
Wherein, on the car body crossbeam of described trackless transport trolley, be fixedly connected with otic placode, described connecting arm by bearing pin with described to be connected otic placode hinged.
Preferably, described stretching force structure also comprises that its one end is individually fixed in two second traction pieces at bearing pin two ends, and its other end is individually fixed on the axletree of rear wheel of described trackless transport trolley.
Wherein, described in, blocking structure comprises: mounted in pairs is at the buffering energy-absorbing device of roadway floor both sides; Be wrapped in the high strength wire rope in buffering energy-absorbing device; Wherein, high strength wire rope is made up of main check cable and the auxiliary check cable that is positioned at main check cable front.
Further, described stretching force structure also comprises: the elastic component of described connecting arm upper surface is fixed in its one end, and its other end is fixed on described connection otic placode.
Preferably, described uncinus is U-shaped hook.
Compared with prior art, the flexible arresting gear tool of the pneumatic off the hook of trackless transport trolley of the present utility model has the following advantages:
1) arresting gear of the present utility model comprises and blocks structure and liftable stretching force structure, and it is simple in structure, installs, easy to use, can make to occur the trackless transport trolley flexible braking of derailing accident, thereby avoid the generation of major industrial accident;
2) stretching force structure of the present utility model has uncinus, and in the time there is derailing accident, uncinus can hook arbitrary cover and block structure, thereby makes trackless transport trolley flexible braking, avoids the generation of major industrial accident;
3) stretching force structure of the present utility model has extensible member, it can drive the relative car body of connecting arm to carry out dipping and heaving, thereby drive the relative car body of uncinus to carry out dipping and heaving, thereby in the time there is not derailing accident, trackless transport trolley can be normally by blocking structure, and in the time there is derailing accident, uncinus hooks and blocks structure, thereby make trackless transport trolley flexible braking, avoid the generation of major industrial accident.
Below in conjunction with accompanying drawing, the utility model is elaborated.
Brief description of the drawings
Fig. 1 is the layout schematic diagram of the stretching force structure of the flexible arresting gear of the pneumatic off the hook of trackless transport trolley of the present utility model;
Schematic diagram when Fig. 2 is trackless transport trolley sport car of the present utility model;
Fig. 3 is the arrangement plan that blocks structure of the flexible arresting gear of the pneumatic off the hook of trackless transport trolley of the present utility model.
Description of reference numerals: 1-stretching force structure; 2-blocks structure; 3-uncinus; 4-connecting arm; 5-extensible member; 6-the first traction piece; 7-connects otic placode; 8-bearing pin; 9-buffering energy-absorbing device; 10-steel rope; The main check cable of 10a-; The auxiliary check cable of 10b-; 11-elastic component; 12-the second traction piece; 13-car body; 14-roadway floor; A-sport car starting point; B-sport car halt point.
Detailed description of the invention
The flexible arresting gear of the pneumatic off the hook of trackless transport trolley of the present utility model is researched and developed by the check cable principle of aircraft carrier deceleration arresting gear, a kind of backup type safety device that this device is trackless transport trolley, it comprises: the many covers that are disposed on roadway floor 14 block structure 2; The liftable stretching force structure 1 that is arranged on trackless transport vehicle body 13 bottoms, stretching force structure 1 has the uncinus 3 that blocks structure 2 in the time of sport car for hooking arbitrary cover.Wherein, uncinus 3 is U-shaped hook.
Arresting gear of the present utility model, as shown in Figure 2, when trackless transport trolley is in the time that derailing accident occurs sport car starting point A, by regulating the distance of the relative trackless transport vehicle body of stretching force structure 1 bottom, thereby make its uncinus 3 hook a set of structure 2 of blocking, to the trackless transport trolley that derailing accident occurs is carried out to flexible braking, and then makes trackless transport trolley in B point (being sport car halt point) stop motion, thereby avoid the generation of major industrial accident.
Concrete, as shown in Figure 1, stretching force structure 1 of the present utility model comprises: the hinged connecting arm 4 of car body crossbeam of its one end and trackless transport trolley, its end is fixedly connected with uncinus 3, adding man-hour, connecting arm 4 can adopt integrated mode with uncinus 3, also can adopt point body formed, be fixedly connected with again the mode that (as welded) is integrated; Be arranged on connecting arm 4 upper surfaces for making the extensible member 5 of its lifting.
Wherein, extensible member 5 of the present utility model can adopt Pneumatic extension bar, it is connected by ventilation flue, on-off valve pneumatic shuttle vehicle-mounted with trackless transport trolley or that carry, the motion that can make this extensible member stretch out or retract when driver's operation (or automatic operation) on-off valve switch, thereby the relative trackless transport vehicle body of connecting arm 4 is declined or upward movement, and then uncinus 3 is declined or upward movement is blocked structure 2 or away from blocking structure 2 to hook.
In addition, extensible member 5 of the present utility model also can adopt hydraulically extensible bar or electric expansion bar, accordingly, on trackless transport trolley, should configure or load corresponding hydraulic efficiency gear or electric device, so that by hydraulic efficiency gear or electric device, drive hydraulically extensible bar or electric expansion bar generation fore and aft motion, block structure 2 or away from blocking structure 2 thereby make uncinus 3 carry out dipping and heaving to hook.Wherein, on the car body crossbeam of trackless transport trolley, be fixedly connected with otic placode 7, connecting arm 4 by bearing pin 8 with to be connected otic placode 7 hinged, thereby carry out under the drive of fore and aft motion at extensible member 5, connecting arm 4 rotates around bearing pin 8, thereby drives uncinus 3 to realize the dipping and heaving of relative car body.
And stretching force structure 1 of the present utility model also comprises that its one end is fixed on the elastic component 11 of connecting arm 4 upper surfaces, its other end is fixed on and connects on otic placode 7.This elastic component 11 is spring, relies on the motion of its elastic force control linkage arm and uncinus, and the effect that provides certain mitigation to impact or shake.
By be fixedly connected with otic placode 7 on car body crossbeam, and connecting arm 4 is by bearing pin 8 mode hinged with being connected otic placode 7, makes to form one-level mechanical behavior between stretching force structure 1 of the present utility model and trackless transport vehicle body.
In use, can be according to the actual conditions of trackless transport trolley operation, by controlling the motion of stretching out or retracting of extensible member, make connecting arm and uncinus around bearing pin cw or left-hand revolution, so that the state of connecting arm car body relative to uncinus in declining or rising.In the utility model, set trackless transport trolley in the time of normal driving states, extensible member is in retracted mode, and the uncinus of connecting arm and end thereof is in propradation.
Further, in order to strengthen the Joint strenght between stretching force structure 1 of the present utility model and trackless transport vehicle body, stretching force structure 1 of the present utility model is except above-mentioned connecting arm 4 and extensible member 5, can also comprise: the first traction piece 6 of connecting arm 4 front ends is fixed in its one end, and its other end is fixed on the axletree of rear wheel of trackless transport trolley; The other end that its one end is individually fixed in 12, two second traction pieces 12 of two the second traction pieces at bearing pin 8 two ends is individually fixed on the axletree of rear wheel of trackless transport trolley.In the utility model, the first traction piece 6 and the second traction piece 12 can adopt steel rope, also can adopt the elastomeric element of having of other.
By the first traction piece 6, the second traction piece 12 are set, making to stretch can have three grades of mechanical behaviors between force structure 1 and trackless transport vehicle body.Wherein, one-level is stressed is connected otic placode 7 for what connect as one with connecting arm 4 by bearing pin 8; Secondary is stressed is the first traction piece 6 being connected with described axletree of rear wheel, main force mechanism when it is trackless transport trolley sport car; Three grades stressed is the second traction piece 12 that bearing pin two ends are connected with axletree of rear wheel, and auxiliary force mechanism when it is trackless transport trolley sport car also has the anxious stopping time of trackless transport trolley sport car, for stablizing the effect of vehicle body.
By three grades of mechanical behaviors are set, can guarantee that trackless transport trolley is in the time that derailing accident occurs, between its stretching force structure and trackless transport vehicle body, there is enough Joint strenghts, while avoiding the pulling force that is subject to when stretching force structure excessive, the generation of stretching force structure and described car body break-off, thereby guarantee in the time of trackless transport trolley generation derailing accident, stretching force structure can with block respective outer side edges and make trackless transport trolley flexible braking.
And as shown in Figure 3, the structure 2 of blocking of the present utility model comprises mounted in pairs at the buffering energy-absorbing device 9 of roadway floor 14 both sides and is wrapped in the high strength wire rope 10 in buffering energy-absorbing device 9, wherein, high strength wire rope 10 is made up of main check cable 10a and the auxiliary check cable 10b that is positioned at main check cable 10a front.
Concrete, as shown in Figure 3, the effect hook point place that blocks structure 2 adopts the mounting means of main and auxiliary check cable braking, wherein main check cable 10a is as the main check cable of trackless transport trolley flexible braking, and auxiliary check cable 10b is as the maybe secondary check cable after main check cable 10a lost efficacy of check cable for subsequent use of trackless transport trolley flexible braking.
At two rubber rings of main check cable 10a intermediate sleeve, auxiliary check cable 10b in the brute spring tensioning of the sidewall of roadway floor, make main check cable 10a, auxiliary check cable 10b and ground keep spacing more than 50mm, uncinus can hook main and auxiliary check cable when guaranteeing trackless transport trolley sport car.
When trackless transport trolley is not in the time that the normal motoring condition of derailing accident occurs, driver's operation (or automatic operation) on-off valve, make it in closed condition, now extensible member maintains original state motionless (being that extensible member is in retracted mode), thereby make connecting arm and the uncinus rise state in relative car body, because the spacing between uncinus and ground is now greater than the spacing between main and auxiliary check cable and ground, therefore trackless transport trolley can safety cross above main and auxiliary check cable, in the time of trackless transport trolley generation derailing accident, driver's operation (or automatic operation) on-off valve, make it in opening, extensible member is in stretching out state, thereby make connecting arm and the uncinus decline state in relative car body, now the spacing between uncinus and ground is less than master, spacing between auxiliary check cable and ground, therefore uncinus hooks the main check cable of a set of high strength wire rope 10 that blocks structure that is arranged in its below, thereby make trackless transport trolley flexible braking, or, hook the auxiliary check cable in high strength wire rope 10, and then make trackless transport trolley flexible braking, avoid the generation of dangerous accident.
In design arresting gear of the present utility model, the intensity of tackle its stretching force structure, blocking structure is carried out verification.
And the correlation parameter that is applicable to the arresting gear of the present utility model that under the coal mine of inkstone north, the tunnel condition of the quick walkway of two levels and the trackless transport trolley of operation are implemented is as follows:
When the full-load run of trackless transport trolley, car body bulk wight is 6700KG, and tunnel inclination maximum is 90 °, and roadway floor friction coefficient is 0.0197, and normal speed when vehicle inclined gallery are descending is 5km/h, converts as 1.39m/s.
When design, in stretching force structure of the present utility model, the work material that connecting arm adopts is the Q235 steel steel plate that 30mm is thick, and its pulling strengrth limit is 380～470MPa, allows that drawing normal stress is 170MPa, and minimum sectional area is 2406mm
2, corresponding smallest cross-sectional width is 80.21mm, adds and is taken as 85mm man-hour.
Of the present utility model blocking in structure, buffering energy-absorbing device is 1.0MJ, and maximum stopping distance is 10m, and the high strength wire rope of use is 6 × 37-
fibre-core cable, minimum breaking force when its tensile strength is 1670MPa is 317KN.
In arresting gear of the present utility model, when blocking structure and drawing while stretching force structure impact effect, maximum impact force is 409090N, is about 41T; Blocking structure is 3509mm with drawing the minimum effective cross sectional area of the point of action place shearing strength value of stretching force structure
2.
Effective protection installing space of the corresponding 90 ° of inclined gallery of buffering energy-absorbing device of the present utility model is 221m, 5m, can be taken as respectively 200m, on the basis of width over sides of car body, adds 1.5m when on-the-spot installation.
Although above the utility model is explained in detail; but the utility model is not limited to this; those skilled in the art can modify according to principle of the present utility model; therefore, all various amendments of carrying out according to principle of the present utility model all should be understood to fall into protection domain of the present utility model.
Claims (9)
1. the flexible arresting gear of the pneumatic off the hook of trackless transport trolley, is characterized in that, comprising:
The many covers that are disposed on roadway floor block structure (2);
Be arranged on the liftable stretching force structure (1) of trackless transport vehicle body bottom, described stretching force structure (1) has the uncinus (3) for blocking structure (2) described in hooking.
2. arresting gear according to claim 1, is characterized in that, described stretching force structure (1) also comprises:
The connecting arm (4) hinged with the car body crossbeam of described trackless transport trolley, its end is fixedly connected with described uncinus (3);
Be arranged on connecting arm (4) upper surface for making the extensible member (5) of its lifting.
3. arresting gear according to claim 2, is characterized in that, described extensible member (5) is Pneumatic extension bar or hydraulically extensible bar or electric expansion bar, and it is connected with the pneumatic shuttle of described trackless transport trolley or hydraulic efficiency gear or electric device.
4. arresting gear according to claim 2, is characterized in that, described stretching force structure (1) also comprises:
First traction piece (6) of described connecting arm (4) front end is fixed in its one end, and its other end is fixed on the axletree of rear wheel of described trackless transport trolley.
5. arresting gear according to claim 2, is characterized in that, is fixedly connected with otic placode (7) on the car body crossbeam of described trackless transport trolley, described connecting arm (4) by bearing pin (8) with described to be connected otic placode (7) hinged.
6. arresting gear according to claim 5, it is characterized in that, described stretching force structure (1) also comprises that its one end is individually fixed in two second traction pieces (12) at bearing pin (8) two ends, and its other end is individually fixed on the axletree of rear wheel of described trackless transport trolley.
7. arresting gear according to claim 1, is characterized in that, described in block structure (2) and comprising:
Mounted in pairs is at the buffering energy-absorbing device (9) of roadway floor both sides;
Be wrapped in the high strength wire rope (10) in buffering energy-absorbing device (9);
Wherein, high strength wire rope (10) by main check cable (10a) and be positioned at main check cable (10a) front auxiliary check cable (10b) form.
8. arresting gear according to claim 5, is characterized in that, described stretching force structure (1) also comprises:
The elastic component (11) of described connecting arm (4) upper surface is fixed in its one end, and its other end is fixed on described connection otic placode (7).
9. arresting gear according to claim 4, is characterized in that, described uncinus (3) is U-shaped hook.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320870598.0U CN203727347U (en) | 2013-12-26 | 2013-12-26 | Pneumatic hook flexible arresting device of trackless transport vehicle |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320870598.0U CN203727347U (en) | 2013-12-26 | 2013-12-26 | Pneumatic hook flexible arresting device of trackless transport vehicle |
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| Publication Number | Publication Date |
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| CN203727347U true CN203727347U (en) | 2014-07-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320870598.0U Expired - Lifetime CN203727347U (en) | 2013-12-26 | 2013-12-26 | Pneumatic hook flexible arresting device of trackless transport vehicle |
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| CN (1) | CN203727347U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108394387A (en) * | 2018-04-12 | 2018-08-14 | 泰安科创矿山设备有限公司 | Pintle and obstruction system |
| FR3074469A1 (en) * | 2017-12-05 | 2019-06-07 | Alstom Transport Technologies | RAILWAY VEHICLE COMPRISING AN EMERGENCY BRAKING DEVICE |
| CN114523943A (en) * | 2022-03-25 | 2022-05-24 | 江苏理工学院 | Vehicle auxiliary braking device and method thereof |
-
2013
- 2013-12-26 CN CN201320870598.0U patent/CN203727347U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3074469A1 (en) * | 2017-12-05 | 2019-06-07 | Alstom Transport Technologies | RAILWAY VEHICLE COMPRISING AN EMERGENCY BRAKING DEVICE |
| EP3511213A1 (en) * | 2017-12-05 | 2019-07-17 | ALSTOM Transport Technologies | Railway vehicle comprising an emergency braking system |
| US10780870B2 (en) | 2017-12-05 | 2020-09-22 | Alstom Transport Technologies | Railway vehicle comprising an emergency braking device |
| CN108394387A (en) * | 2018-04-12 | 2018-08-14 | 泰安科创矿山设备有限公司 | Pintle and obstruction system |
| CN114523943A (en) * | 2022-03-25 | 2022-05-24 | 江苏理工学院 | Vehicle auxiliary braking device and method thereof |
| CN114523943B (en) * | 2022-03-25 | 2022-12-23 | 江苏理工学院 | Vehicle auxiliary braking device and method thereof |
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Granted publication date: 20140723 Effective date of abandoning: 20231219 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |