Anti-rubbing card running road isolating device for high-speed toll station
Technical Field
The invention relates to the technical field of road equipment, in particular to a highway toll station anti-card-rubbing driving lane isolating device.
Background
ETC is the electronic toll collection system of not stopping, ETC specialized lane is for those vehicles that have installed ETC vehicle-mounted device to use, adopt the electronic toll collection mode, ETC electronic toll collection system is the most advanced way bridge toll collection mode in the world at present, through the special short-range communication of microwave between the microwave antenna on the vehicle-mounted electronic label installed on vehicle windshield and the ETC lane on the toll station, utilize computer networking technology and bank to carry out the backstage settlement and process, thus reach the vehicle and pass the purpose that the bridge toll station need not stop and can pay for the way bridge fee through the way bridge, the electronic toll collection technology is suitable for adopting under the highway or the busy bridge tunnel environment especially. The electronic toll collection system under the traditional lane isolation measure is generally called a single-lane electronic toll collection system, and the electronic toll collection system under the free traffic flow under the condition of no lane isolation is generally called a free flow electronic toll collection system. The electronic toll collection is implemented, and vehicles can be allowed to pass at high speed, so that the traffic capacity of a road can be greatly improved; the highway charging is electronic, the cost of charging management can be reduced, and the operating benefit of vehicles can be improved; and simultaneously, the noise level and the exhaust emission of the toll gate can be greatly reduced. The traffic capacity is greatly improved, so that the scale of the toll station can be reduced, and the capital construction cost and the management cost are saved.
Because the ETC recognition mode is a front induction coil, when a vehicle runs to the induction coil, a front railing is opened, the interval is about ten meters, some non-ETC users exist on an ETC lane, the vehicle wants to rub the card while the gap passes, although counter measures such as black list drawing exist at high speed, some vehicles still hold a good feeling, the vehicle accelerator and opportunity are mastered by the vehicle users, some vehicles successfully pass and some vehicles rub against each other, and due to the fact that the accident probability of the behavior is high, traffic resources and police resources are greatly wasted after alarm processing, the ETC lane is not paid back when the vehicle runs, even if the accident does not occur, the mood of a rear vehicle driver is greatly influenced, and the accident risk probability of the road section is increased invisibly.
Disclosure of Invention
The invention aims to provide a highway isolation device for preventing a card from being rubbed at a high-speed toll station so as to solve the problems in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the anti-card-rubbing driving lane isolation device for the high-speed toll station comprises a linear speed-limiting area arranged between a recognition coil and an isolation belt along a driving track, a crossing-preventing area is arranged between two adjacent lanes along the extension direction of the isolation belt and extends to the recognition coil, and a plurality of speed-limiting units are arranged in the linear speed-limiting area and the crossing-preventing area.
When a vehicle wants to drive into an ETC channel, the vehicle firstly passes through an identification coil, the identification coil identifies an ETC device installed on the vehicle and reads information, then the vehicle slowly drives from a linear speed limit area, a speed limit unit in the linear speed limit area provides enough friction when the vehicle slowly passes through the speed limit unit, so that the vehicle can normally drive, when the vehicle drives to a toll coil, a fee is deducted by background calculation until the vehicle drives to a railing coil, the railing is lifted, the vehicle smoothly passes through the speed limit unit, if the vehicle is lifted to wait in the linear speed limit area, the vehicle is operated by servo, when a vehicle with a card reaches the identification coil, the speed of the vehicle with the card is inevitably greater than or equal to that of an idling vehicle on a side lane, if the vehicle with the card is rubbed, the lane change is inevitably accelerated, when the vehicle suddenly accelerates, the friction between the vehicle and the speed limit unit is suddenly reduced, so that wheels idle, therefore, the vehicle can not naturally move, and the lane change under certain condition can not be completed, the ETC vehicle can only continuously drive forwards and is paid manually, so that a driver is psychologically forced not to rub the card and the card cannot be rubbed successfully, the benefits of the ETC vehicle are effectively guaranteed, the vehicle distance can be kept in a linear speed-limiting area, and the driving of a small wing is more beneficial to the maintenance of the road order.
Preferably, two linear speed limiting areas are arranged on one road, the distance between the two linear speed limiting areas is 1300-1400mm, the width of the linear speed limiting area is 400-500mm, the width of the speed limiting unit is equal to the width of the linear speed limiting area, the speed limiting units are arranged in plurality along the length direction of the linear speed limiting area, and the distance between the adjacent speed limiting units is less than 70 mm.
The wheel track of most vehicles is 1500mm, the distance between two linear speed limit areas is 1300-1400mm, the wheel track can adapt to the wheel track of the vehicles, and the width of the wheel track is also 400-500mm, so that tires on two sides of the vehicles can be in the linear speed limit areas, and the wheels can be realized without high driving technology, if a driver who wants to rub the card makes the tire on one side separate from the linear speed limit area, the power on one side of the vehicle is limited, the vehicle is easy to lose control, the vehicle is forced to follow the traffic rules, the tires can be loaded on the speed limit units through a plurality of speed limit units in the linear speed limit areas, and in order to ensure that the tires of the vehicles are in continuous contact with the tires, the gap between the tires is less than 70mm, namely, the tires of the vehicles are in continuous contact with the speed limit units, so that a good speed limit effect is provided, the identification is high, and the judgment of the drivers is easy.
Preferably, the speed-limiting unit in the linear speed-limiting area comprises a plurality of roller sets distributed along the length direction of the speed-limiting unit, and at least three roller sets are included in the range of 200mm along the length direction of the speed-limiting unit, wherein each roller set comprises a roller swivel mount, a damping box and a supporting roller.
The width of a general tire is about 200mm, the roller sets are arranged at a small interval in order to have enough relative friction and contact with the tire, when the tire passes through the speed limiting unit, the tire is inevitably contacted with the three roller sets, particularly contacted with the supporting roller, when the tire runs, certain friction force and relative rotation are generated on the supporting roller, the damping box is used for providing damping force during rotation, the direction of the supporting roller can be changed by utilizing the roller rotation seat, namely when the tire turns, the supporting roller can rotate along with the roller rotation, and the relative friction force in the circumferential direction of the supporting roller is ensured.
Preferably, be equipped with on the speed limit unit and hold two the speed limit roller holding tank of roller swivel mount, speed limit roller holding tank is located the support frame, the roller swivel mount with rotate through the pivot that resets between the support frame and connect, the axis direction of pivot that resets is vertical direction, the inboard of roller swivel mount is fixed with two the damping box, the backing roll is arranged two between the damping box, and through reduction gear group with the damping box transmission is connected, the backing roll for the damping box rotates through supporting pivot and bearing and connects, the axis of supporting the pivot with the axis of pivot that resets is perpendicular, the backing roll with be equipped with between the supporting pivot along with the backing roll rotational speed changes connection status's locking part.
The support frame and the roller rotary seat, the damping box and the support roller inside the support frame form a speed limiting unit, when a tire runs between two rows of support rollers in one speed limiting unit, the tire is only contacted with the support roller, when the tire runs at a slow speed, the support roller rotates at a slow speed, and simultaneously the support roller drives the support rotating shaft to rotate when rotating, so that the tire and the damping box are transmitted through the speed reducing gear set to generate a damping effect, and when the support roller rotates at a fast speed, the locking part is separated from the support rotating shaft through the action of centrifugal force, namely the support roller directly rotates through the bearing and the support rotating shaft, namely the support roller is in an idle running state, the friction force cannot be provided for the tire, the tire can idle run between the two support rollers and cannot advance, so that the limitation on the vehicle speed is realized, the limitation on sudden acceleration starting is very effective, and the speed isolation is realized, the situation of accelerating lane change is prevented.
Preferably, the locking part includes counter weight portion, guide part and elasticity extrusion part, the inside of backing roll is equipped with and holds counter weight portion and elasticity extrusion part's spout, be equipped with in the support pivot with counter weight portion complex draw-in groove, elasticity extrusion part is located the guide part is kept away from one side of counter weight portion, works as when the rotational speed of backing roll rises to the predetermined value, counter weight portion follows break away from in the draw-in groove.
When the rotating speed of the supporting roller is increased along with the increase of the rotating speed of the tire, the counterweight part slides outwards due to centrifugal force to overcome the elasticity given by the elastic extrusion part, after a certain rotating speed is reached, the guide part is completely separated from the clamping groove, no relative acting force exists between the supporting roller and the supporting rotating shaft, the supporting roller rotates relative to the supporting rotating shaft by virtue of the bearing, the resistance is suddenly reduced, and the tire and the supporting roller rotate at high speed at the moment and cannot provide forward friction power.
Preferably, the elastic pressing member is an adjustable spring.
The adjustable spring can be extruded by arranging a bolt at one end, and the pressure of the spring is controlled, so that the adjustable spring is suitable for different limited rotating speeds.
Preferably, adjacent two connect through the transmission of linkage gear train between the roller swivel mount, the linkage gear train includes a gear wheel and two ring gears, and two ring gears are fixed respectively two the outer wall of pivot resets, gear wheel and two the ring gear meshing is connected, the bottom of support frame is equipped with the water conservancy diversion part.
In order to ensure that the supporting roller can rotate at a certain angle along with the tire when the tire rotates, and the direction of friction force is kept in the circumferential direction of the supporting roller, so that speed-limiting resistance can be accurately provided for the tire, and in order to improve the directivity, after a roller rotating seat at the front part rotates, a roller rotating seat at the rear part is also subjected to angle adjustment due to transmission of a gear set, so that good directional matching between the supporting roller and the tire is ensured.
Preferably, the reduction gear set is a planetary gear set, the reduction gear set comprises a central gear, a planetary gear and an inner gear ring, the central gear is fixed on the supporting rotating shaft, the inner gear ring is fixed on the inner wall of the damping box, and the planetary gear is connected between the central gear and the inner gear ring in a meshing manner.
The damping property is generated by the engagement among the sun gear, the planet gear and the inner gear ring, so that the support roller and the tire rotate relatively, and simultaneously, the friction force for driving the tire is provided, and the normal running of the vehicle in a low-speed state is ensured.
Preferably, the crossing preventing area is provided with a plurality of speed limiting units, and the width of the speed limiting unit in the crossing preventing area is larger than that of the speed limiting unit in the linear speed limiting area.
The support rollers in the speed limiting unit on the anti-crossing region are wider in width because the support rollers do not need to provide steering with the tire, and the speed limit of the support rollers in the anti-crossing region can be set lower, and friction is provided less, effectively preventing crossing of the vehicle.
Preferably, the surface of the supporting roller is provided with a rubber layer, and the highest point of the supporting roller protrudes 20-30mm out of the road surface.
The arrangement can increase the wear resistance of the supporting roller and the friction force of the contact between the supporting roller and the tire, can also improve the contact capability between the supporting roller and the tire by utilizing the convex supporting roller, and has better performance on the accuracy of reaction speed and the controllability of low speed.
Compared with the prior art, the invention has the beneficial effects that:
the invention sets a linear speed-limiting area and a crossing-preventing area in the range between the identification coil and the isolation belt of the ETC channel, wherein a speed-limiting unit composed of rotating rollers is arranged, if a driver wants to realize the card-swiping, the acceleration and lane change are required to be completed in the linear speed-limiting area and the crossing-preventing area, the rotating speed of wheels of a vehicle can be limited through a supporting roller, the vehicle can only advance at a specified speed, if the speed is too high, the vehicle idles, the sudden change of the speed is prevented, the possibility that the vehicle wants to change lanes is limited, the vehicle is also prompted to decelerate slowly before entering the ETC, and the safety is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a highway isolation device for preventing card rubbing in a high-speed toll station;
FIG. 2 is a schematic structural diagram of a speed limiting unit of the anti-card-rubbing driving lane isolating device of the high-speed toll station;
FIG. 3 is a schematic structural diagram of a crossing area prevented by the anti-card-smearing lane isolation device of the high-speed toll station;
FIG. 4 is a schematic structural diagram of the device for preventing the card from being rubbed on the driving lane of the high-speed toll station;
FIG. 5 is a schematic structural diagram of a supporting roller of the anti-card-rubbing lane isolation device of the high-speed toll station in a damping state;
fig. 6 is a schematic structural diagram of the supporting roller of the anti-card-rubbing lane isolating device of the high-speed toll station in a free rotation state.
Reference numbers in the figures: 101. an isolation zone; 102. a balustrade coil; 103. a railing; 104. a toll coil; 105. identifying a coil; 2. a speed limiting unit; 201. a speed-limiting roller accommodating groove; 3. a linear speed limit area; 4. preventing a cross-zone; 5. the roller is rotated; 51. a support frame; 52. a flow guide member; 53. resetting the rotating shaft; 54. a linkage gear set; 6. a damping box; 61. a reduction gear set; 62. a support shaft; 621. a card slot; 7. a support roller; 701. a chute; 71. a locking member; 711. a counterweight portion; 712. a guide portion; 713. an elastic pressing member; 72. and a bearing.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): as shown in fig. 1 to 6, the anti-card-smearing running lane isolating device for the high-speed toll station comprises a linear speed-limiting area 3 arranged between an identification coil 105 and an isolation belt 101 along a running track, a crossing preventing area 4 is arranged between two adjacent lanes and along the extension direction of the isolation belt 101, the crossing preventing area 4 extends to the identification coil 105, and a plurality of speed-limiting units 2 are arranged in the linear speed-limiting area 3 and the crossing preventing area 4.
When a vehicle wants to drive into an ETC channel, firstly the vehicle passes through the recognition coil 105, the recognition coil 105 recognizes an ETC device installed on the vehicle and reads information, then the vehicle slowly drives from the linear speed limit area 3, the speed limit unit 2 in the linear speed limit area 3 provides enough friction when the vehicle slowly passes through, so that the vehicle can normally drive, when the vehicle drives to the charging coil 104, the fee deduction is calculated in the background until the vehicle drives to the railing coil 102, the railing 103 is lifted, the vehicle smoothly passes through, if the vehicle waits in the linear speed limit area 3, the vehicle is mechanically driven, when a truck reaches the recognition coil 105, the speed of the truck is larger than or equal to the vehicle idling beside the lane, if the vehicle beside needs to be accelerated and changed lane, and when the truck suddenly accelerates, the friction between the truck and the speed limit unit 2 is suddenly reduced, so that the wheels idle, therefore, the vehicle can be stationary, must can't accomplish accelerating lane change, can only continue to go forward, pass through by artifical payment, will compel the driver to do not from the psychology like this and can't rub the action of card successfully, the effectual benefit of having guaranteed the ETC vehicle, the vehicle also can keep the vehicle distance in sharp speed limit district 3, "the driving of careful wing" more helps the maintenance of road order.
Specifically, as shown in fig. 1, two linear speed-limiting areas 3 are arranged on a road, the distance between the two linear speed-limiting areas 3 is 1300-1400mm, the width of the linear speed-limiting area 3 is 400-500mm, the width of the speed-limiting unit 2 is equal to the width of the linear speed-limiting area 3, the speed-limiting units 2 are arranged in plurality along the length direction of the linear speed-limiting area 3, and the distance between adjacent speed-limiting units 2 is less than 70 mm.
As most of vehicle wheel tracks are 1500mm, the distance between the two linear speed limit areas 3 is 1300-1400mm, the wheel track can adapt to the wheel base of the vehicle, and the width of the wheel track is also 400-500mm, so that tires on two sides of the vehicle can be in the linear speed limit areas 3, and the vehicle can be realized without high driving technology, if a driver who wants to rub the vehicle makes the tire on one side separate from the linear speed limit area 3, the power on one side of the vehicle is limited, the vehicle is easy to lose control, the vehicle is forced to follow the traffic rules, the tires can be loaded on the speed limit units 2 through the plurality of speed limit units 2 in the linear speed limit areas 3, and in order to ensure that the tires are in continuous contact, the gap between the tires is less than 70mm, namely, the tires of the vehicle are in continuous contact with the speed limit units 2, so that a good speed limit effect is provided, the identification is high, and the judgment is easy for the driver.
Specifically, the speed-limiting unit 2 in the linear speed-limiting area 3 comprises a plurality of roller sets distributed along the length direction of the speed-limiting unit 2, and at least three roller sets are included in the range of 200mm along the length direction of the speed-limiting unit 2, wherein each roller set comprises a roller swivel mount 5, a damping box 6 and a supporting roller 7.
The width of a general tire is about 200mm, the roller sets are arranged at a small interval in order to have enough relative friction and contact with the tire, when the tire passes through the speed limiting unit 2, the tire is inevitably contacted with the three roller sets, particularly the supporting roller 7, when the tire runs, certain friction force and relative rotation are generated on the supporting roller 7, the damping box 6 is used for providing damping force during rotation, the direction of the supporting roller 7 can be changed by using the roller rotary seat 5, namely when the tire turns, the supporting roller 7 can rotate along with the rotation, and the relative friction force in the circumferential direction of the supporting roller 7 is ensured.
Specifically, as shown in fig. 4, a speed-limiting roller accommodating groove 201 for accommodating two roller rotary seats 5 is provided on the speed-limiting unit 2, the speed-limiting roller accommodating groove 201 is located in the support frame 51, the roller rotary seats 5 are rotatably connected with the support frame 51 through a reset rotary shaft 53, the axial direction of the reset rotary shaft 53 is vertical, two damping boxes 6 are fixed on the inner side of the roller rotary seats 5, the support roller 7 is arranged between the two damping boxes 6 and is in transmission connection with the damping boxes 6 through a reduction gear set 61, the support roller 7 is rotatably connected with the damping boxes 6 through a support rotary shaft 62 and a bearing 72, the axial line of the support rotary shaft 62 is perpendicular to the axial line of the reset rotary shaft 53, and a locking component 71, the connection state of which changes along with the rotation speed of the support roller 7, is provided between the support roller 7 and the support rotary shaft 62.
The supporting frame 51, the roller rotary seat 5, the damping box 6 and the supporting roller 7 inside the supporting frame form a speed limiting unit 2, when a tire runs between two rows of supporting rollers 7 in one speed limiting unit 2, the tire is only contacted with the supporting roller 7, when the tire runs at a slow speed, the supporting roller 7 rotates at a slow speed, and simultaneously the supporting roller 7 drives the supporting rotating shaft 62 to rotate when rotating, so that the tire is transmitted with the damping box 6 through the speed reducing gear set 61 to generate a damping effect, and when the rotating speed of the supporting roller 7 is high, the locking part 71 is separated from the supporting rotating shaft 62 through the action of centrifugal force, namely, the supporting roller 7 directly rotates through the bearing 72 and the supporting rotating shaft 62, namely, the supporting roller 7 is in an idle running state, the tire cannot provide friction force for the tire, the tire can idle run between the two supporting rollers 7 and cannot advance, so that the limitation on the vehicle speed is realized, therefore, speed isolation is realized, and the situation of accelerating lane change is prevented.
Specifically, the locking member 71 includes a weight portion 711, a guide portion 712, and an elastic pressing member 713, the support roller 7 is provided inside with a slide groove 701 for accommodating the weight portion 711 and the elastic pressing member 713, the support shaft 62 is provided with a locking groove 621 engaged with the weight portion 711, the elastic pressing member 713 is located on a side of the guide portion 712 away from the weight portion 711, and when the rotation speed of the support roller 7 increases to a predetermined value, the weight portion 711 is disengaged from the locking groove 621.
When the rotating speed of the supporting roller 7 is increased along with the increase of the rotating speed of the tire, the weight part 711 slides outwards due to centrifugal force to overcome the elastic force given to it by the elastic pressing part 713, after reaching a certain rotating speed, the guide part 712 is completely separated from the clamping groove 621, no relative acting force exists between the supporting roller 7 and the supporting rotating shaft 62, the supporting roller 7 rotates relative to the supporting rotating shaft 62 by virtue of the bearing 72, the resistance is suddenly reduced, and the tire and the supporting roller 7 rotate at high speed at the moment and cannot provide forward friction power.
Specifically, the resilient pressing member 713 is an adjustable spring or an electromagnetic coil.
The adjustable spring can be extruded by arranging a bolt at one end, the pressure of the spring is controlled, so that the adjustable spring is suitable for different limited rotating speeds, the adjustment by using the electromagnetic coil can be more convenient, and at the moment, the counterweight part 711 is provided with a magnetic block.
Specifically, two adjacent roller rotary bases 5 are in transmission connection through a linkage gear set 54, the linkage gear set 54 comprises a large gear and two gear rings, the two gear rings are respectively fixed on the outer walls of the two reset rotating shafts 53, the large gear is in meshing connection with the two gear rings, and a flow guide component 52 is arranged at the bottom of the support frame 51.
In order to ensure that the supporting roller 7 can rotate with the tire by a certain angle when the tire rotates, the direction of friction force is kept in the circumferential direction of the supporting roller 7, so that speed-limiting resistance can be accurately provided for the tire, and in order to improve the directivity, after the front roller rotating seat 5 rotates, the rear roller rotating seat 5 is also subjected to angle adjustment due to transmission of the gear set, so that good directional matching between the supporting roller 7 and the tire is ensured.
Specifically, the reduction gear set 61 is a planetary gear set, the reduction gear set 61 includes a sun gear, a planetary gear and an inner gear ring, the sun gear is fixed on the support rotating shaft 62, the inner gear ring is fixed on the inner wall of the damping box 6, and the planetary gear is engaged and connected between the sun gear and the inner gear ring.
Damping is generated through the engagement among the sun gear, the planet gear and the inner gear ring, so that the support roller 7 provides friction force for driving the tire while rotating relative to the tire, and normal running of the vehicle in a low-speed state is ensured.
Specifically, a plurality of speed limiting units 2 are arranged on the span-preventing area 4, and the width of the speed limiting unit 2 in the span-preventing area 4 is larger than that of the speed limiting unit 2 in the linear speed limiting area 3.
The width of the support rollers 7 in the speed limiting unit 2 in the anti-crossing region 4 is wider because the support rollers 7 do not need to provide steering with the tire, and the speed limit of the support rollers 7 in the anti-crossing region 4 can be set lower, the friction is provided less, and the crossing of the vehicle is effectively prevented.
Specifically, the surface of the supporting roller 7 is provided with a rubber layer, and the highest point of the supporting roller 7 protrudes 20-30mm out of the road surface.
Through the arrangement, the wear resistance of the supporting roller 7 and the friction force of contact between the supporting roller 7 and the tire can be increased, the contact capability between the supporting roller 7 and the tire can be improved by the convex supporting roller, and the performance is better in the accuracy of reaction speed and the controllability of low speed.
The working principle is as follows: when a vehicle wants to drive into an ETC channel, firstly the vehicle passes through the recognition coil 105, the recognition coil 105 recognizes an ETC device installed on the vehicle and reads information, then the vehicle slowly drives from the linear speed limit area 3, the speed limit unit 2 in the linear speed limit area 3 provides enough friction when the vehicle slowly passes through, so that the vehicle can normally drive, when the vehicle drives to the charging coil 104, the fee deduction is calculated in the background until the vehicle drives to the railing coil 102, the railing 103 is lifted, the vehicle smoothly passes through, if the vehicle waits in the linear speed limit area 3, the vehicle is mechanically driven, when a truck reaches the recognition coil 105, the speed of the truck is larger than or equal to the vehicle idling beside the lane, if the vehicle beside needs to be accelerated and changed lane, and when the truck suddenly accelerates, the friction between the truck and the speed limit unit 2 is suddenly reduced, so that the wheels idle, therefore, the vehicle can be stationary, the lane change cannot be finished without acceleration, the vehicle can only run forwards continuously and is paid by manpower, so that a driver can be forced to avoid the behavior of card smearing mentally and cannot rub the card successfully, the benefit of an ETC vehicle is effectively ensured, the vehicle can keep the vehicle distance in a linear speed-limiting area 3, the driving of a small wing is facilitated, the road order is maintained, the distance between the set roller sets is small, when the tire passes through the speed-limiting unit 2, the tire is contacted with three roller sets inevitably, particularly the supporting roller 7, when the tire runs, certain friction force and relative rotation are generated on the supporting roller 7, the damping force during rotation is provided through the damping box 6, the direction of the supporting roller 7 can be changed by utilizing the roller 5, namely when the tire turns, the supporting roller 7 can rotate along with the rotating, and the relative friction force in the circumferential direction of the supporting roller 7 is ensured, when the tire runs between the two rows of support rollers 7 in one speed limiting unit 2, the tire is in contact with only the support rollers 7, when the tire runs at a slow speed, the support roller 7 rotates at a slow speed, and the support roller 7 rotates to drive the support rotating shaft 62 to rotate, thereby transmitting with the damping box 6 through the reduction gear set 61 to generate a damping effect, and when the supporting roller 7 rotates at a high speed, the locking member 71 is out of contact with the supporting rotation shaft 62 by the centrifugal force, that is, the support roller 7 directly rotates through the bearing 72 and the support shaft 62, that is, the support roller 7 is in an idle state and cannot provide friction force to the tire, the tire is idle between the two support rollers 7 and cannot advance, thereby achieving limitation of the vehicle speed, the limitation on the sudden acceleration start is very effective, thus achieving speed isolation and preventing the acceleration lane change condition from occurring.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.