CN107618347A - The power drive system of underground carry scraper - Google Patents
The power drive system of underground carry scraper Download PDFInfo
- Publication number
- CN107618347A CN107618347A CN201710758706.8A CN201710758706A CN107618347A CN 107618347 A CN107618347 A CN 107618347A CN 201710758706 A CN201710758706 A CN 201710758706A CN 107618347 A CN107618347 A CN 107618347A
- Authority
- CN
- China
- Prior art keywords
- motor
- axle
- power
- scraper
- drive system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
A kind of power drive system of underground carry scraper of the present invention, including front driving device and rear drive equipment, rear drive equipment are located in the Rear frame of scraper, and in the Rear frame of scraper, another part is located in the front frame of scraper a front driving device part；Front driving device includes preceding motor, front propeller shaft component and front axle, and preceding motor is arranged on the front portion of Rear frame, and front axle is arranged in the front frame, and preceding motor imparts power to front axle by front propeller shaft component；Rear drive equipment includes rear motor, afterwards be hinged power transmission shaft and rear axle, and rear motor is arranged on the rear portion of the Rear frame, and rear axle is arranged in Rear frame, and rear motor imparts power to rear axle by rear be hinged power transmission shaft.The technical problem to be solved in the present invention is to provide a kind of by the way of motor direct-drive vehicle bridge, the power drive system of the high underground carry scraper of transmission efficiency, security reliability.
Description
Technical field
The present invention relates to underground carry scraper technical field, more particularly to a kind of power drive system of underground carry scraper.
Background technology
Underground carry scraper is mainly used in mine ore removal, slagged tap, and low level drop shaft unloads ore deposit etc., be one kind by tire row
Enter, and the plant equipment loaded and unloaded and transported by front fuselage scraper bowl.
Existing notification number is that CN201320471319.3 understands a kind of power and transmission system of underground remote-controlled scraper, should
In patent, dynamical system is diesel engine or motor, and transmission system is hydraulic mechanical transmission system, there is torque-converters, speed change
Case, power transmission shaft and vehicle bridge.Travel direction is controlled by gearbox when scraper is run, and speed is common by engine, torque-converters, gearbox
With control.Fluid torque-converter efficiency in low speed, high pulling torque operating mode is very low, at the same the fault rate of hydraulic mechanical transmission system compared with
Height, working service cost are high.And the transmission critical component that underground carry scraper uses relies on import, cost is high, delivery cycle length,
Exploitation manufacture to high-power scraper forms certain restriction.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of by the way of motor direct-drive vehicle bridge, transmission efficiency
The power drive system of underground carry scraper high, security reliability is high.
A kind of power drive system of underground carry scraper of the present invention, including front driving device and rear drive equipment, the rear-guard
Dynamic device is located in the Rear frame of scraper, and the front driving device part is in the Rear frame of scraper, another part
In the front frame of scraper；
The front driving device includes preceding motor, front propeller shaft component and front axle, the preceding motor installation
The front portion of vehicle frame in the rear, the front axle are arranged in the front frame, and the preceding motor passes through front propeller shaft group
Part imparts power to front axle；
The rear drive equipment includes rear motor, afterwards be hinged power transmission shaft and rear axle, the rear motor installation
The rear portion of vehicle frame in the rear, the rear axle are arranged in the Rear frame, and the rear motor passes through described rear be hinged
Power transmission shaft imparts power to rear axle.
The power drive system of underground carry scraper of the present invention, wherein the forerunner, which moves motor, includes preceding driving motor body, institute
The both sides of driving motor body are provided with the first mounting bracket before stating, and the preceding motor is installed by first mounting bracket
In the rear on vehicle frame.
The power drive system of underground carry scraper of the present invention, wherein the front propeller shaft component is preceding be hinged including what is be sequentially connected
Power transmission shaft, preceding fixed conveyor axle and front axle power transmission shaft, the output shaft of be hinged power transmission shaft and the preceding motor connects before described
Connect.
The power drive system of underground carry scraper of the present invention, wherein the rear-guard, which is moved after motor includes, drives motor body, institute
The both sides of motor body are driven to be provided with the second mounting bracket after stating, the rear motor is installed by second mounting bracket
In the rear on vehicle frame.
The power drive system of underground carry scraper of the present invention, wherein after described be hinged power transmission shaft and the motor afterwards it is defeated
Go out axis connection.
The power drive system of underground carry scraper of the present invention, further comprise wherein the forerunner moves motor：First motor
Controller；
Motor further comprises after described：Second electric machine controller.
The power drive system of underground carry scraper of the present invention, wherein the front axle further comprises respectively with rear axle：
Limited slip differential, hub reduction gear and closing wet brake.
The power drive system of underground carry scraper of the present invention, wherein the front driving device and rear drive equipment at least one
Perform work order.
Compared with prior art, advantage for present invention and have the beneficial effect that：
(1) before the preceding motor of the present invention is respectively passed to Dynamic response by corresponding power transmission shaft with rear motor
Vehicle bridge and rear axle, by the way of motor direct-drive vehicle bridge, compared with traditional hydraulic mechanical transmission system, it instead of change
Fast case, torque-converters etc., the labyrinth between motor and vehicle bridge is reduced, the power of motor is directly passed to vehicle bridge, power passes
Efficiency high is passed, improves the tractive force and efficiency of movement of scraper, the action completed required for scraper can be quickly finished, and
And it is simple in construction, the fault rate of scraper is reduced, and be easy to repair.
(2) the preceding motor of the present invention is installed in Rear frame with rear motor, is saved the space of front frame, is made shovel
The integrated model of fortune machine is compact, and counterweight is reasonable.
The power drive system of the underground carry scraper of the present invention is described further below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the structural representation of the power drive system of underground carry scraper of the present invention；
Fig. 2 be underground carry scraper of the present invention power drive system in preceding motor installation diagram；
Fig. 3 be underground carry scraper of the present invention power drive system in after motor installation diagram；
Wherein：1st, rear motor；2nd, power transmission shaft is hinged afterwards；3rd, rear axle；4th, preceding motor；5th, front propeller shaft group
Part；6th, front axle；7th, Rear frame；8th, front frame；
101st, motor body is driven afterwards；102nd, the second mounting bracket；103rd, the second electric machine controller；104th, the second transition method
It is blue；105th, Rear frame installing plate；
401st, preceding driving motor body；402nd, the first mounting bracket；403rd, the first electric machine controller；404th, First Transition method
It is blue；
501st, preceding be hinged power transmission shaft；502nd, preceding fixed conveyor axle；503rd, front axle power transmission shaft.
Embodiment
As shown in figure 1, a kind of power drive system of underground carry scraper of the present invention, wherein, underground carry scraper includes mutually hinge
The front frame 8 connect and Rear frame 7, power drive system include front driving device and rear drive equipment, and rear drive equipment is located at scraper
In the Rear frame 7 of machine, for a front driving device part in the Rear frame 7 of scraper, another part is located at the front truck of scraper
On frame 8；
Front driving device includes preceding motor 4, front propeller shaft component 5 and front axle 6, after preceding motor 4 is arranged on
The front portion of vehicle frame 7, front axle 6 is arranged in front frame 8, before preceding motor 4 is imparted power to by front propeller shaft component 5
Vehicle bridge 6；
Rear drive equipment includes rear motor 1, afterwards be hinged power transmission shaft 2 and rear axle 3, after rear motor 1 is arranged on
The rear portion of vehicle frame 7, rear axle 3 is arranged in Rear frame 7, after rear motor 1 is imparted power to by rear be hinged power transmission shaft 2
Vehicle bridge 3.
Scraper drives front axle 6, rear driving electricity by preceding motor 4 respectively when advancing or carrying out shovel dress work
Machine 1 drives rear axle 3, and it is the state worked independently from each other to make front driving device and rear drive equipment, and the safety for improving equipment can
By property.
Preceding motor 4 is installed in Rear frame 7 with rear motor 1, is saved the space of front frame 8, is made scraper
Integrated model it is compact, counterweight is reasonable.
Preceding motor 4 is identical with the mounting structure of rear motor 1, below to preceding motor 4 and rear motor 1
Mounting structure be described respectively：
As shown in Fig. 2 preceding motor 4 includes the preceding body of motor 4, the both sides of the preceding body of motor 4 are provided with the
One mounting bracket 402, preceding motor 4 are arranged in Rear frame 7 by the first mounting bracket 402, and the first mounting bracket 402 is logical
Cross bolt and nut connection preceding motor 4 is fixed on the installing plate of Rear frame 7.
The preceding be hinged power transmission shaft 501, preceding fixed conveyor axle 502 and front axle that front propeller shaft component 5 includes being sequentially connected pass
Moving axis 503, the output axis connection of preceding be hinged power transmission shaft 501 and preceding motor 4.
Wherein, preceding be hinged power transmission shaft 501 is the flexible power transmission shaft that both ends are connected with Hooke's joint, and it is to transmit that it, which is acted on,
Power, while the space length of flange face and the change of angle are adjusted when Rear frame 7 and front frame 8 are with respect to articulation steering；
One end of the output shaft of preceding motor 4 is provided with First Transition flange 404；
Preceding fixed conveyor axle 502 includes the regular length axle of both ends adpting flange, and regular length axle is by two rolling bearings
Support and be fixed on the axle bed of front frame 8, axially and radially all Constrained of regular length axle, can only rotate, its
Effect is passing power and be hinged power transmission shaft 501 is fixed on the fulcrum that forebay provides fixation for before；
Front axle power transmission shaft 503 is the flexible power transmission shaft that both ends are connected with Hooke's joint, and its effect is passing power,
But also the alignment error before can adjusting and/or compensating between fixed conveyor axle 502 and front axle 6；
The specific mounting structure of front propeller shaft component 5 is, one end of preceding be hinged power transmission shaft 501 by crossed joint universal drive shaft with
Counter flange is connected, and the other end is connected by crossed joint universal drive shaft with the flange of preceding one end of fixed conveyor axle 502, preceding fixed conveyor
The other end of axle 502 is led to by flange and the universal axis connection of crossed joint of front axle propeller shaft one end, the other end of front axle propeller shaft
Cross crossed joint universal drive shaft to be connected with front axle 6, power is directly passed to front truck by preceding motor 4 by front propeller shaft component 5
Bridge 6.
As shown in figure 3, rear motor 1 includes the rear body of motor 1, the both sides of the rear body of motor 1 are provided with the
Two mounting brackets 102, rear motor 1 are arranged in Rear frame 7 by the second mounting bracket 102, and the second mounting bracket 102 is logical
Cross bolt and nut connection rear motor 1 is fixed on Rear frame installing plate 105.
The output axis connection of power transmission shaft 2 and rear motor 1 is hinged afterwards.
Wherein, be hinged power transmission shaft 2 is the flexible power transmission shaft that both ends are connected with Hooke's joint afterwards, and it is that transmission is dynamic that it, which is acted on,
Power, can also be adjusted and/or the alignment error between small electromotor and rear axle 3；
One end of the output shaft of motor 1 is provided with the second counter flange 104 afterwards；
One end of preceding be hinged power transmission shaft 501 is connected by crossed joint universal drive shaft with counter flange afterwards, and the other end passes through cross
Section universal drive shaft is connected with rear axle 3, and power is directly passed to rear car by rear preceding motor 4 by rear preceding be hinged power transmission shaft 501
Bridge 3.
Preceding motor 4 and rear motor 1 respectively by corresponding power transmission shaft by Dynamic response pass to front axle 6 with
Rear axle 3, by the way of motor direct-drive vehicle bridge, compared with traditional hydraulic mechanical transmission system, instead of gearbox,
Torque-converters etc., the labyrinth between motor and vehicle bridge is reduced, the power of motor is directly passed to vehicle bridge, power transmission efficiency
Height, the tractive force and efficiency of movement of scraper are improved, the action completed required for scraper bowl machine can be quickly finished, moreover, knot
Structure is simple, reduces the fault rate of scraper, and is easy to repair.
Preceding motor 4 further comprises：First electric machine controller 403, the first electric machine controller 403 pass through the first peace
Before dress support 402 is fixed on driving motor body 401, the first electric machine controller 403 is used for the rotation of motor 4 before controlling
Direction and rotary speed.
Motor 1 further comprises afterwards：Second electric machine controller 103, the second electric machine controller 103 pass through the second peace
Dress support 102 is driven on motor body 101 after being fixed on, and the second electric machine controller 103 is used for the rotation of motor 1 after controlling
Direction and rotary speed.
Scraper is provided with controller, and controller is used to instruct to scraper sending action, scraper is completed scraper bowl
Lifting, decline, receive bucket, action of tumbling, the first electric machine controller 403 and the second motor control are moved for receive that controller sends
Instruct and control motor execute instruction.
Front driving device and rear drive equipment are separate working condition, further, front driving device and rear-guard
At least one the execution work order of dynamic device.
When scraper performs scraper action, controller is respectively to the first electric machine controller 403 and the second electric machine controller
103 send corresponding actions instruction, in theory, under conditions of single motor has sufficiently large output power, preceding driving dress
Put and at least one execution scraper work order of rear drive equipment, it is preferred that in one embodiment of the present of invention, due to scraper
The machine power required in scraper is larger, to improve the operating efficiency of scraper scraper, front driving device and rear drive equipment
Cooperation.
When scraper performs traveling action, the power of output is smaller required for scraper, and controller is respectively to the first electricity
The electric machine controller 103 of machine controller 403 and second sends corresponding actions instruction, front driving device and rear drive equipment at least one
Individual execution traveling action command, if one of them in front driving device and rear drive equipment breaks down, scraper can be according to
Travelled by one of drive device to maintenace point, improve the Reliability And Maintainability of equipment.
In one embodiment of the present of invention, preceding motor 4 uses bidirectional rotation buncher with rear motor 1.
Front axle 6 further comprises respectively with rear axle 3：Limited slip differential, hub reduction gear and closing wet braking
Device；
Limited slip differential, solves scraper when being travelled on bad road surface (miriness, ice and snow road etc.), because a side drive wheel connects
Touch muddy, ice and snow road and skid (trackslip) in situ, driving wheel of the opposite side on good road surface, which is but in motionless state, makes car
The shortcomings that handling capacity reduces, there is scraper and effectively pass through performance；
Hub reduction gear, have the function that to slow down to increase and turn round, make the load born of front driving device and rear drive equipment
Reduce, the advantages that size diminishes and makes vehicle bridge obtain the larger road clearance；
Wet brake is closed, is the multi-disk wet brake that hydrodynamic pressure release is packed with the spring for forcing to cool down, utilizes
The brake can ensure good braking ability, avoid drive device failure and caused by brake failure, improve scraper
Driving safety.
In one embodiment of the present of invention, preceding motor 4 can use outside or vehicle power to supply with rear motor 1
Electricity, this sample system can directly dock with various electric power new energy resources systems, realize energy-saving and emission-reduction.Further, external power source is such as
Mine power is through trailing cable system or through stringing system power supply.Further, vehicle power such as bavin electric generator group or battery
Energy-storage system or the hybrid power system being made up of the above two are powered.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
Enclose and be defined, on the premise of design spirit of the present invention is not departed from, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made, it all should fall into the protection domain of claims of the present invention determination.
Claims (8)
- A kind of 1. power drive system of underground carry scraper, it is characterised in that：Including front driving device and rear drive equipment, after described Drive device is located in the Rear frame of scraper, and the front driving device part is in the Rear frame of scraper, another portion Divide in the front frame of scraper；The front driving device includes preceding motor, front propeller shaft component and front axle, and the preceding motor is arranged on institute The front portion of Rear frame is stated, the front axle is arranged in the front frame, and the preceding motor will by front propeller shaft component Power passes to front axle；The rear drive equipment includes rear motor, afterwards be hinged power transmission shaft and rear axle, and the rear motor is arranged on institute The rear portion of Rear frame is stated, the rear axle is arranged in the Rear frame, and the rear motor passes through the rear be hinged transmission Axle imparts power to rear axle.
- 2. the power drive system of underground carry scraper according to claim 1, it is characterised in that：The preceding motor includes Preceding driving motor body, the both sides of motor body are driven to be provided with the first mounting bracket before described, the preceding motor passes through institute The first mounting bracket is stated in the Rear frame.
- 3. the power drive system of underground carry scraper according to claim 1 or 2, it is characterised in that：The front propeller shaft group Part includes preceding be hinged power transmission shaft, preceding fixed conveyor axle and the front axle power transmission shaft being sequentially connected, be hinged power transmission shaft and institute before described The output axis connection of motor before stating.
- 4. the power drive system of underground carry scraper according to claim 1, it is characterised in that：Motor includes after described After drive motor body, it is described after the both sides of driving motor body be provided with the second mounting bracket, the motor afterwards passes through institute The second mounting bracket is stated in the Rear frame.
- 5. the power drive system of the underground carry scraper according to claim 1 or 4, it is characterised in that：Be hinged transmission after described The output axis connection of axle and the rear motor.
- 6. the power drive system of underground carry scraper according to claim 1, it is characterised in that：The preceding motor enters one Step also includes：First electric machine controller；Motor further comprises after described：Second electric machine controller.
- 7. the power drive system of underground carry scraper according to claim 1, it is characterised in that：The front axle and rear axle Further comprise respectively：Limited slip differential, hub reduction gear and closing wet brake.
- 8. the power drive system of underground carry scraper according to claim 1, it is characterised in that：The front driving device is with after At least one execution work order of drive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758706.8A CN107618347A (en) | 2017-08-29 | 2017-08-29 | The power drive system of underground carry scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710758706.8A CN107618347A (en) | 2017-08-29 | 2017-08-29 | The power drive system of underground carry scraper |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107618347A true CN107618347A (en) | 2018-01-23 |
Family
ID=61089187
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710758706.8A Pending CN107618347A (en) | 2017-08-29 | 2017-08-29 | The power drive system of underground carry scraper |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107618347A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204000A (en) * | 2018-09-30 | 2019-01-15 | 北京科技大学 | A kind of pantograph especially of stringing formula pure electric vehicle underground carry scraper stringing system |
| CN109532444A (en) * | 2019-01-09 | 2019-03-29 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN109624680A (en) * | 2018-12-07 | 2019-04-16 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200971151Y (en) * | 2006-06-14 | 2007-11-07 | 陈爱玲 | Shift-drive-mechanism of electric tricycle |
| CN103009990A (en) * | 2012-12-18 | 2013-04-03 | 上海中科深江电动车辆有限公司 | Hybrid electric drive system for multi-axes vehicles |
| US20130130856A1 (en) * | 2010-05-14 | 2013-05-23 | Beijing Zhi Ke Investment And Management Co., Ltd. | Electric vehicle driving system |
| CN203373789U (en) * | 2013-07-24 | 2014-01-01 | 招远华丰机械设备有限公司 | Double-motor drive carry-scraper |
| CN204355974U (en) * | 2014-12-11 | 2015-05-27 | 厦门朴思起重设备有限公司 | A kind of drive axle of improvement and the connection structure of motor |
| DE102013021008A1 (en) * | 2013-12-13 | 2015-06-18 | Man Truck & Bus Ag | Hybridization of a driven by a commercial vehicle axle |
| CN105799478A (en) * | 2016-03-11 | 2016-07-27 | 北汽福田汽车股份有限公司 | Driving system of vehicle, control method of driving system and vehicle |
| CN205930208U (en) * | 2016-08-27 | 2017-02-08 | 大连铁丰轨道交通装备有限责任公司 | Combined car of battery |
| CN207374096U (en) * | 2017-08-29 | 2018-05-18 | 北京安期生技术有限公司 | The power drive system of underground carry scraper |
-
2017
- 2017-08-29 CN CN201710758706.8A patent/CN107618347A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200971151Y (en) * | 2006-06-14 | 2007-11-07 | 陈爱玲 | Shift-drive-mechanism of electric tricycle |
| US20130130856A1 (en) * | 2010-05-14 | 2013-05-23 | Beijing Zhi Ke Investment And Management Co., Ltd. | Electric vehicle driving system |
| CN103009990A (en) * | 2012-12-18 | 2013-04-03 | 上海中科深江电动车辆有限公司 | Hybrid electric drive system for multi-axes vehicles |
| CN203373789U (en) * | 2013-07-24 | 2014-01-01 | 招远华丰机械设备有限公司 | Double-motor drive carry-scraper |
| DE102013021008A1 (en) * | 2013-12-13 | 2015-06-18 | Man Truck & Bus Ag | Hybridization of a driven by a commercial vehicle axle |
| CN204355974U (en) * | 2014-12-11 | 2015-05-27 | 厦门朴思起重设备有限公司 | A kind of drive axle of improvement and the connection structure of motor |
| CN105799478A (en) * | 2016-03-11 | 2016-07-27 | 北汽福田汽车股份有限公司 | Driving system of vehicle, control method of driving system and vehicle |
| CN205930208U (en) * | 2016-08-27 | 2017-02-08 | 大连铁丰轨道交通装备有限责任公司 | Combined car of battery |
| CN207374096U (en) * | 2017-08-29 | 2018-05-18 | 北京安期生技术有限公司 | The power drive system of underground carry scraper |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109204000A (en) * | 2018-09-30 | 2019-01-15 | 北京科技大学 | A kind of pantograph especially of stringing formula pure electric vehicle underground carry scraper stringing system |
| CN109624680A (en) * | 2018-12-07 | 2019-04-16 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
| CN109532444A (en) * | 2019-01-09 | 2019-03-29 | 湖北金诚信矿业服务有限公司 | A kind of electric LHD |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN206233295U (en) | The underground carry scraper that electrokinetic cell drives | |
| CN107618347A (en) | The power drive system of underground carry scraper | |
| CN102365227A (en) | Fuel saving control device for working machine and fuel saving control method for working machine | |
| CN203876576U (en) | Single-axle hydraulic driving device of large mining self-unloading vehicle | |
| CN103863103B (en) | A kind of have double dynamical electric transmission underground mining truck | |
| CN104201666A (en) | Petroleum drilling machine direct current micro-grid system | |
| CN207374096U (en) | The power drive system of underground carry scraper | |
| CN110884522B (en) | Train brake installed at bottom of train | |
| CN107542119A (en) | Double dynamical underground carry scraper | |
| CN201272340Y (en) | Hydraulic motor brake loop | |
| CN202966476U (en) | Trackless rubber wheel shuttletram | |
| CN102826056B (en) | Automobile crane and driving system thereof | |
| CN204103484U (en) | A kind of oil-well rig DC micro power grid system | |
| CN203780313U (en) | Loading machine | |
| CN103770636B (en) | A kind of large-scale mine dumping car list bridge fluid pressure drive device | |
| CN102963458A (en) | Railless rubber wheel shuttle car | |
| CN203285333U (en) | Full hydraulic rotation lifting type vehicle-mounted drilling and workover rig | |
| CN204199345U (en) | The electric drive crawler dozer that a kind of single motor twin shaft exports | |
| CN107324162A (en) | Air-pressure brake formula fluid coupling flexible pipe or cable drum | |
| CN206942683U (en) | A kind of super capacitor energy-storage net electricity Self propelled type well repairing machine | |
| CN110921472A (en) | Permanent-magnet direct-drive type mine hoist | |
| CN207106172U (en) | Wheeled crane chassis more bridge driving devices and wheeled crane chassis | |
| CN207550164U (en) | A kind of vehicle brake compression Air to air ERV and utilize device | |
| CN206456350U (en) | A kind of braking automobile failure emergency braking apparatus | |
| CN112744038A (en) | Flying automobile driving system and flying automobile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |