CN202202491U - Automatic snow removing device for roof - Google Patents

Automatic snow removing device for roof Download PDF

Info

Publication number
CN202202491U
CN202202491U CN2011203123823U CN201120312382U CN202202491U CN 202202491 U CN202202491 U CN 202202491U CN 2011203123823 U CN2011203123823 U CN 2011203123823U CN 201120312382 U CN201120312382 U CN 201120312382U CN 202202491 U CN202202491 U CN 202202491U
Authority
CN
China
Prior art keywords
car body
push pedal
rope
automatic snow
snow removal
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.)
Withdrawn - After Issue
Application number
CN2011203123823U
Other languages
Chinese (zh)
Inventor
周建钊
杨小强
徐婷
代菊英
储伟俊
刘安心
张宏梅
张建风
竺啸
孙博
王勇
孟磊磊
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ENGINEERING-CORPS ENGINEERING COLLEGE SCIENCE AND ENGINEERING UNIV OF PLA
Original Assignee
ENGINEERING-CORPS ENGINEERING COLLEGE SCIENCE AND ENGINEERING UNIV OF PLA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ENGINEERING-CORPS ENGINEERING COLLEGE SCIENCE AND ENGINEERING UNIV OF PLA filed Critical ENGINEERING-CORPS ENGINEERING COLLEGE SCIENCE AND ENGINEERING UNIV OF PLA
Priority to CN2011203123823U priority Critical patent/CN202202491U/en
Application granted granted Critical
Publication of CN202202491U publication Critical patent/CN202202491U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

Links

Images

Abstract

The utility model relates to an automatic snow removing device for a roof. The automatic snow removing device comprises a frame, a longitudinal guide rail, a vehicle body, a transverse rail, a traveling motor, a first reducing mechanism, a transmission shaft, a driving motor, a transverse push plate, a longitudinal push plate, a second reducing mechanism and a winch transmission mechanism; the vehicle body is arranged on the longitudinal guide rail; the longitudinal push plate is connected to the lower end of the vehicle body; the transverse rail is hinged on one side, which is perpendicular to the longitudinal guide rail, of the vehicle body; the transmission shaft is hinged on the vehicle body; the traveling motor is in transmission connection with a wheel shaft on the vehicle body through the first reducing mechanism; the driving motor is in transmission connection with the transmission shaft through the second reducing mechanism; the transmission shaft is in transmission connection with the winch transmission mechanism; and the winch transmission mechanism is in transmission connection with the transverse push plate. The automatic snow removing device has the advantages that snow accumulating on a roof can be removed completely in the longitudinal and the transverse directions, and the transverse push plate has the capability of crossing obstacles, so that the device has higher working efficiency; meanwhile, the angle of the transverse rail can be adjusted, so that the requirements on snow removal for roofs with different degrees of inclination can be met.

Description

The automatic snow removal equipment of ceiling
Technical field
The utility model relates to the snow-removal machine technical field, relates in particular to the automatic snow removal equipment of ceiling.
Background technology
In recent years, worldwide diastrous weather happens occasionally, and snow disaster wherein also is obvious ascendant trend.Accumulated snow thickness transfinites and causes ceiling or roof can not bear that it is heavy, and the ceiling of buildings such as the storehouse that causes thus, station, petrol filling station, farm product market, crops booth caves in, and causes serious casualties and property loss.
The accumulated snow on ceiling or roof all adopts the artificial method of removing at present unlike the such easy removing in ground.The people must stand on ceiling or the roof and clean during removing, and eaves height wind is big, and ceiling bearing strength reliable existing problems also whether, therefore has work under bad environment, the problem of operational security difference; Also exist working area big simultaneously, the problem that manual labor is heavy.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of above-mentioned prior art, and a kind of automatic snow removal equipment of ceiling with automatic job, obstacle detouring function is provided.This device is implemented through following technical proposals:
The automatic snow removal equipment of said ceiling comprises frame, longitudinal rail, car body, cross track, movable motor, first reducing gear, power transmission shaft, drive motors, laterally push pedal, vertically push pedal, second reducing gear and capstan winch transmission mechanism; Said longitudinal rail places on the said frame; Said car body places on the said longitudinal rail; Said vertical push pedal is connected the lower end of said car body; Said cross track is hinged on the side with the perpendicular car body of longitudinal rail, and said power transmission shaft is hinged on the car body, and said movable motor and drive motors are separately fixed on the car body; Movable motor is in transmission connection through the axletree on said first reducing gear and the car body, and said drive motors is in transmission connection through said second reducing gear and power transmission shaft; Said capstan winch transmission mechanism comprises capstan winch, third wheel, break-in wheel and drives rope; Said capstan winch is fixedly connected on the power transmission shaft; Said break-in wheel is hinged on the cross track; Said third wheel is hinged on the corresponding position of car body corresponding position or car body and cross track; Drive rope solderless wrapped connection break-in wheel and third wheel and form opposite first laterally the driving the rope part and laterally drive the rope part with second of transmission direction, laterally push pedal and first drives laterally that rope partly is connected or partly is connected with the second horizontal driving rope.
The further design of the automatic snow removal equipment of said ceiling is; Said cross track has two; Place with the perpendicular direction of longitudinal rail on, an end of these two cross tracks is hinged with the car body corresponding end respectively, the other end respectively with being connected an of drag-line that is fixed in the car body corresponding end.
The further design of the automatic snow removal equipment of said ceiling is; Said car body corresponding end is provided with three regulating wheels that are in the shape of the letter V and distribute; Be in the middle regulating wheel of V font and be connected movably in the long slot bore, a said drag-line that is fixed in the car body corresponding end is around said three regulating wheels that are in the shape of the letter V and distribute.
The further design of the automatic snow removal equipment of said ceiling is; Said horizontal push pedal comprises push pedal, push rod and spring; The two ends of said push rod partly connect with the first or second corresponding horizontal rope that drives respectively; Push pedal is articulated in cross bar, and the upper and lower end of spring is connected with the counterpart of push pedal, push rod respectively.
The further design of the automatic snow removal equipment of said ceiling is that said vertical push pedal and car body have two tie points, and one of them is a fixed connection point, and one is to flexibly connect point.
The further design of the automatic snow removal equipment of said ceiling is, is provided with motor controlling cabinet in the outside of a said cross track, and movable motor is connected with the corresponding end of said motor controlling cabinet through cable respectively with drive motors.
The further design of the automatic snow removal equipment of said ceiling is; Two ends at the long rails of said frame respectively are provided with a pulley; The said cable of connection movable motor is walked around a pulley and is passed a connecting ring and is connected with Electric Machine Control corresponding end cashier's office in a shop; Frame one end corresponding to another pulley connects a rope, and this rope is walked around said another pulley and passed said connecting ring and be fixed in correspondence one end of car body.
Further design at the automatic snow removal equipment of said ceiling is; Comprise a motor control mechanism in the said motor controlling cabinet, this mechanism mainly by single-chip microcomputer, connect said single-chip microcomputer input photosignal with form near the signal input circuit of switching signal and the relay drive circuit that is connected the single-chip microcomputer output.
The further design of the automatic snow removal equipment of said ceiling is; The signal of said signal input circuit produces by light-sensitive element with near switch; Saidly be arranged on the two ends of said cross track near switch, said light-sensitive element is arranged on the corresponding height and position of frame.
The further design of the automatic snow removal equipment of said ceiling is that said capstan winch is provided with fixed leg, and fixed leg is connected on the circumferential position of capstan winch, and the two ends of said driving rope are connected on the fixed leg.
The push pedal of passing through horizontal and vertical both direction of the utility model and motor control mechanism realize cleaning all sidedly automatically ceiling accumulated snow; Wherein guide cross slide way one end and the frame of horizontal push pedal campaign hinged; One end is connected with drag-line; This drag-line is around three regulating wheels that are arranged in the V font; It is positioned at the regulating wheel position-adjustable in the middle of the V font, and the angle of regulating cross slide way through the position of regulating this regulating wheel is to adapt to the ceiling of different gradients; The utility model also hinged the and between through push pedal and push rod be connected spring, make push pedal when meeting resistance, can produce certain rotation, and after resistance is eliminated, can automatically reset, make horizontal push pedal have obstacle climbing ability; In addition; The utility model makes it to be connected with a rope through a connecting ring to having carried out new setting with car body in the cable arrangements of the movable motor of longitudinal rail walking, and the variation of the variation of cable length and rope lengths is complementary in the car body walking process; Make cable length scalable; The walking of car body can not occur influencing because of cable is too short, it is long and produce unnecessary dilatory part cable also can not occur, makes the cable arrangement compactness neat and artistic in order.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the obstacle detouring sketch map of horizontal push pedal when advancing.
Fig. 3 is the obstacle detouring sketch map of horizontal push pedal when retreating.
Fig. 4 is the cable stretching structure sketch map of movable motor.
Fig. 5 is the circuit theory diagrams of controlling organization.
The specific embodiment
Map 1, the automatic snow removal equipment of ceiling mainly are made up of frame 10, longitudinal rail 11, car body 20, movable motor 43, first reducing gear 40, power transmission shaft 21, cross track 31, drive motors 63, laterally push pedal 34, vertically push pedal 12, second reducing gear 60 and capstan winch transmission mechanism 50.Frame 10 is a rectangular frame structure, is provided with respectively as the supporting leg on the excavator 13 at four jiaos of places, and this height of landing leg scalable, leg is rotatable to be changed with the angle that adapts to ceiling.Longitudinal rail 11 is arranged on the length direction of frame 10, and car body 20 places on the longitudinal rail 11.Be equipped with two parallel axletrees 22 on the car body 20, the two ends of axletree connect wheel 23 respectively, and this wheel 23 is walked on longitudinal rail 11.Movable motor 43 is that a reducing motor is fixed on the car body; This motor is through being arranged at a pair of reduction gearing 41,42 on a movable motor axle and the axletree axletree that is in transmission connection respectively; Thereby drive wheels 23 ', pitch wheel 41,42 constitutes first reducing gear 40.Also be provided with the power transmission shaft 21 perpendicular on the car body with axletree 22; The drive motors 63 that is fixed in car body is through the gear on gear on it 61 and the power transmission shaft 62 power transmission shaft 22 that is in transmission connection; Make its deceleration increase the moving capstan winch 52 of twisted strip and rotate, the engaged transmission of gear 61 and gear 62 constitutes second reducing gear 60.
Cross track 31 has two, parallelly is seated in the direction perpendicular with long rails 11, and one of which end and car body corresponding end are hinged, form pin joint O2.The other end is connected with drag-line 30.The other end of drag-line 30 is fixed on the corresponding end face of car body; This car body end face is provided with three regulating wheels 24 that are in the shape of the letter V and distribute; Be in the middle regulating wheel of V font and be articulated in movably on the car body through the long slot bore on the car body end face 25, all the other two regulating wheels are fixedly hinged in the car body counterpart.Drag-line 30 is regulated interior card bearing up pulley high and low position in long slot bore 25 around these three said regulating wheels, and cross track 31 is rotated around pin joint O2, forms cross track 31 angle different with the face of sweeping away snow, to adapt to different gradient ceilings (or roof) face.
Capstan winch transmission mechanism 50 is mainly by capstan winch 52, three third wheels 54, break-in wheels 55 with drive rope 53 and form.Capstan winch 52 is fixedly connected on the power transmission shaft 21; Break-in wheel 55 is hinged on the cross track 31; Third wheel 54 is hinged on the corresponding position (also can omit the third wheel on the cross track, drive rope and directly cause the break-in wheel on the cross track by capstan winch) of car body 20 and cross track 31.Driving rope 53 forms to have around break-in wheel and third wheel (but solderless wrapped connection on break-in wheel and third wheel more than a circle) and is parallel to opposite first laterally the driving rope part 53a and second and laterally drive rope part 53b of cross track and transmission direction.The two ends that drive rope 53 are fixedly connected on the fixed leg 52 of capstan winch, and fixed leg 52 is connected through spiral on the circumferential position of capstan winch, and the end of fixed leg 51 screw that also spins is in order to the two ends of fixed drive rope 53.
Laterally push pedal mainly is made up of push pedal 34, push rod 33 and spring 35.The two ends of push rod 33 are hinged through junction plate 36 and push pedal respectively, form pin joint O1.The upper and lower end of spring 35 is connected with the counterpart of push pedal 34, push rod 33 respectively.Junction plate 36 lower knuckles become U-shaped, and crooked part extend in the cross track 31, which is provided with the screw 37 that is used for fastening driving rope 53, make the second horizontal rope part 53b that drives that drives rope be fixed in horizontal push pedal through screw 37.Preferable embodiment is a hinged again turnover panel 38 in the lower end of push pedal 34; So horizontal push pedal is moved along cross slide way through the driving cable traction at push rod 35 two ends, when in laterally process is being advanced in push pedal, when running into obstruction; Push pedal is rotated around pin joint O1; Lift the below, thereby clear the jumps, and sees also Fig. 2.After clearing the jumps, receive spring tension effect push pedal to get back to initial position.Simultaneously, push rod plays position-limiting action to push pedal.The elastic force of spring can also guarantee that push pedal do not turn over after the meeting when running into obstacle.When retreating when running into obstruction in horizontal push pedal, turnover panel rotates around the pin joint with push pedal, and lift the below, clears the jumps with this, sees also Fig. 3.
Vertically push pedal 12 is fixed on the connecting rod 14 of car body 20 belows through two screw 12a, 12b; Vertically push pedal 12 is provided with arc-shaped slot 12c; This push pedal 12 at first is connected on the connecting rod 14 through screw 12a; Regulate the angle of vertical push pedal then through slotted eye 12c, make it and the face that sweeps away snow suitable, this two screw 12a, 12b at last again screw.
The rotation of movable motor and drive motors is controlled by motor control mechanism; This mechanism places in the motor controlling cabinet 70; This motor controlling cabinet 70 is fixed on the outside of a cross track 31, and movable motor 43 is connected with the corresponding end of said motor controlling cabinet through cable respectively with drive motors 63.The length of the cable of movable motor changes with the walking position of car body; The dilatory of unnecessary cable appears sometimes; Compact clean and tidy for guaranteeing that cable remains, the utility model adopts a connecting ring 71, and on the frame 10 at long rails two ends, respectively is provided with a pulley 73,74; See also Fig. 4, the cable 72 that connects movable motor is walked around pulley 73 and is passed a connecting ring 71 and is connected with corresponding end on the motor controlling cabinet 70.Frame one end corresponding to another pulley 74 connects a rope 75, and this rope is walked around pulley 74 and passed said connecting ring and be fixed in correspondence one end of car body.The syndeton of this cable makes cable length scalable, the walking of car body can not occur influencing because of cable is too short, and it is long and produce unnecessary dilatory part cable also can not occur.
Motor control mechanism mainly is made up of the relay drive circuit of single-chip microcomputer and connection single-chip microcomputer output port, sees also Fig. 5.Input signal produces by light-sensitive element with near switch, is arranged on the two ends (not shown) of said cross track near switch, and light-sensitive element is arranged on (not shown) on the corresponding height and position of frame.Single-chip microcomputer adopts the ATmega8-16AC single-chip microcomputer in the present embodiment, comprises corresponding voltage controller power source, signal input output end mouth.This single-chip microcomputer is mainly accomplished the signal of accepting outside input, carries out logical operation and judgement, the output control signal, and corresponding work drive motor or movable motor are controlled in the switching that drives relay switch.One-chip machine port PB0 is to 4 corresponding relays of interface control of PB3.Through the switching of single-chip microcomputer logic control relay, control motor starting with stop.A motor is controlled by two relays, through the open and close controlling motor of two relays, thus the rotating of realization motor.
The utility model can manually start or when accumulated snow thickness surpasses setting value (like 5cm) when meeting with snowfall weather, the photosensitive switch startup.Distinguish that for after accumulated snow thickness transfinites drive motors starts and drives horizontal push pedal and accomplish snow removing.Then, the drive motors counter-rotating, laterally push pedal is regained.The machine operation of going, the distance of the width that sweeps away snow that is about as much as horizontal push pedal of advancing drives vertical push pedal and is stopped in top accumulated snow cleaning back, gets into the next laterally work engineering of push pedal.Then car body at the width that sweeps away snow of the horizontal push pedal of advancing until to the other end of long rails.Like the whole length that can not cover ceiling, then the utility model device is moved to not operation area, carry out said process again.
The utility model also is provided with prompt tone, warning lamp etc. in motor control mechanism, disturb in case animals such as birds stop the signal that causes.

Claims (10)

1. the automatic snow removal equipment of ceiling is characterized in that comprising frame, longitudinal rail, car body, cross track, movable motor, first reducing gear, power transmission shaft, drive motors, laterally push pedal, vertically push pedal, second reducing gear and capstan winch transmission mechanism; Said longitudinal rail places on the said frame; Said car body places on the said longitudinal rail; Said vertical push pedal is connected the lower end of said car body; Said cross track is hinged on the side with the perpendicular car body of longitudinal rail, and said power transmission shaft is hinged on the car body, and said movable motor and drive motors are separately fixed on the car body; Movable motor is in transmission connection through the axletree on said first reducing gear and the car body, and said drive motors is in transmission connection through said second reducing gear and power transmission shaft; Said capstan winch transmission mechanism comprises capstan winch, third wheel, break-in wheel and drives rope; Said capstan winch is fixedly connected on the power transmission shaft; Said break-in wheel is hinged on the cross track; Said third wheel is hinged on the corresponding position of car body corresponding position or car body and cross track, drives rope solderless wrapped connection break-in wheel and third wheel and forms opposite first laterally the driving the rope part and laterally drive the rope part with second of transmission direction, and laterally push pedal and first drives laterally that rope partly is connected or partly is connected with the second horizontal driving rope.
2. the automatic snow removal equipment of ceiling according to claim 1; It is characterized in that said cross track has two; Place with the perpendicular direction of longitudinal rail on; One end of these two cross tracks is hinged with the car body corresponding end respectively, the other end respectively with being connected an of drag-line that is fixed in the car body corresponding end.
3. the automatic snow removal equipment of ceiling according to claim 2; It is characterized in that said car body corresponding end is provided with three regulating wheels that are in the shape of the letter V and distribute; Be in the middle regulating wheel of V font and be connected movably in the long slot bore, a said drag-line that is fixed in the car body corresponding end is around said three regulating wheels that are in the shape of the letter V and distribute.
4. the automatic snow removal equipment of ceiling according to claim 3; It is characterized in that said horizontal push pedal comprises push pedal, push rod and spring; The two ends of said push rod partly connect with the first or second corresponding horizontal rope that drives respectively; Push pedal is articulated in cross bar, and the upper and lower end of spring is connected with the counterpart of push pedal, push rod respectively.
5. the automatic snow removal equipment of ceiling according to claim 4 is characterized in that said vertical push pedal and car body have two tie points, and one of them is a fixed connection point, and one is to flexibly connect point.
6. the automatic snow removal equipment of ceiling according to claim 5 is characterized in that being provided with motor controlling cabinet in the outside of a said cross track, and movable motor is connected with the corresponding end of said motor controlling cabinet through cable respectively with drive motors.
7. the automatic snow removal equipment of ceiling according to claim 6; It is characterized in that respectively being provided with a pulley at the two ends of the long rails of said frame; The said cable of connection movable motor is walked around a pulley and is passed a connecting ring and is connected with Electric Machine Control corresponding end cashier's office in a shop; Frame one end corresponding to another pulley connects a rope, and this rope is walked around said another pulley and passed said connecting ring and be fixed in correspondence one end of car body.
8. the automatic snow removal equipment of ceiling according to claim 6; It is characterized in that in said motor controlling cabinet, comprising a motor control mechanism, this mechanism mainly by single-chip microcomputer, connect said single-chip microcomputer input photosignal with form near the signal input circuit of switching signal and the relay drive circuit that is connected the single-chip microcomputer output.
9. the automatic snow removal equipment of ceiling according to claim 6; The signal that it is characterized in that said signal input circuit produces by light-sensitive element with near switch; Saidly be arranged on the two ends of said cross track near switch, said light-sensitive element is arranged on the corresponding height and position of frame.
10. the automatic snow removal equipment of ceiling according to claim 1 is characterized in that said capstan winch is provided with fixed leg, and fixed leg is connected on the circumferential position of capstan winch, and the two ends of said driving rope are connected on the fixed leg.
CN2011203123823U 2011-08-24 2011-08-24 Automatic snow removing device for roof Withdrawn - After Issue CN202202491U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011203123823U CN202202491U (en) 2011-08-24 2011-08-24 Automatic snow removing device for roof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011203123823U CN202202491U (en) 2011-08-24 2011-08-24 Automatic snow removing device for roof

Publications (1)

Publication Number Publication Date
CN202202491U true CN202202491U (en) 2012-04-25

Family

ID=45966623

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011203123823U Withdrawn - After Issue CN202202491U (en) 2011-08-24 2011-08-24 Automatic snow removing device for roof

Country Status (1)

Country Link
CN (1) CN202202491U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352674A (en) * 2011-08-24 2012-02-15 中国人民解放军理工大学工程兵工程学院 Automatic ceiling snow sweeping device
CN107288273A (en) * 2017-06-28 2017-10-24 北京林业大学 A kind of greenhouse automatic snow removing device
CN108797902A (en) * 2018-06-11 2018-11-13 夏静 A kind of bus platform that can be removed the snow certainly

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102352674A (en) * 2011-08-24 2012-02-15 中国人民解放军理工大学工程兵工程学院 Automatic ceiling snow sweeping device
CN102352674B (en) * 2011-08-24 2013-06-05 中国人民解放军理工大学工程兵工程学院 Automatic ceiling snow sweeping device
CN107288273A (en) * 2017-06-28 2017-10-24 北京林业大学 A kind of greenhouse automatic snow removing device
CN108797902A (en) * 2018-06-11 2018-11-13 夏静 A kind of bus platform that can be removed the snow certainly
CN108797902B (en) * 2018-06-11 2020-10-27 丁娇娇 Bus stop capable of automatically removing snow

Similar Documents

Publication Publication Date Title
CN102352674B (en) Automatic ceiling snow sweeping device
CN101794974B (en) Gripper type intelligent obstacle removing robot for electric transmission line
DE102011076620A1 (en) Non-rail vehicle
CN202077385U (en) Grass cutter for Yellow River levee slopes
WO2012163761A2 (en) Non-rail-bound vehicle
CN205708916U (en) A kind of overline bridge transports with refuse receptacle and cleans device
CN202202491U (en) Automatic snow removing device for roof
CN202678898U (en) Deicing robot for transmission line
CN205857096U (en) A kind of removable fence
CA2720316A1 (en) Multi-purpose load lifting working platform or/and composite bridge structure
CN111864629B (en) Urban railway inspection robot and using method thereof
CN206308561U (en) A kind of motor-operated switch device for straddle-type monorail train
CN106207927A (en) A kind of power transmission line anti-crushing by snow device
CN103660934B (en) A kind of Automatic clutch of tractor
DE3841092A1 (en) Generalised combination vehicle (rail/road), magnetic or mechanial side rails and guide rails, magnetic drives, high-speed switches and generalised transport routes (rail/road)
CN207583301U (en) A kind of voluntarily double ladder
CN201910595U (en) Intelligent tour inspection traveling mechanism for operating state of high-voltage lines
CN107514109A (en) Warmhouse booth automatic snow remover
CN111733745A (en) Edge-arranged crossbeam sweeping disc inlet and outlet system
CN2608550Y (en) Single direction automatic safety car arrester
CN209099252U (en) A kind of tide lane automatism isolation lever apparatus
CN204609733U (en) Be provided with the retractable door of scrubbing structure
DE102007011709A1 (en) Arrangement for supplying electricity to trace-bound vehicle, has bus bar, which runs in upper open channel along drive of vehicle
CN1752349A (en) Movable traffic command signal device
CN2260871Y (en) Friction-driving electric road-junction bar

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
AV01 Patent right actively abandoned

Granted publication date: 20120425

Effective date of abandoning: 20130605

RGAV Abandon patent right to avoid regrant