阅读说明：本技术 车辆自动轮挡防溜车装置 (Anti-sliding device for automatic wheel chock of vehicle ) 是由 杨秀清 毛刚 张建权 谌泓宇 廖诗来 向勇 魏炫宇 王小锐 何威 李貌 马俊勇 于 2021-08-25 设计创作，主要内容包括：本发明涉及车辆防溜车装置技术领域,公开了一种车辆自动轮挡防溜车装置,包括支架、轮挡单元、上驱动活塞、下驱动活塞和液压系统；支架固定在车辆底盘之上；轮挡单元包括下放壳体、上连杆和下连杆；上连杆和下连杆两端分别与下放壳体、支架铰接相连构成铰链四杆机构；上驱动活塞固定安装在支架上,上驱动活塞的活塞杆与上连杆铰接相连；下驱动活塞安装在下放壳体内,下驱动活塞的活塞杆竖直向下设置；液压系统用于控制上驱动活塞和下驱动活塞。本发明可避免机场特种车辆出现溜车问题,从而避免了由于车辆溜车导致的安全事故的发生。(The invention relates to the technical field of vehicle anti-sliding devices, and discloses a vehicle automatic wheel block anti-sliding device, which comprises a bracket, a wheel block unit, an upper driving piston, a lower driving piston and a hydraulic system, wherein the bracket is arranged on the upper driving piston; the bracket is fixed on the vehicle chassis; the wheel chock unit comprises a lower shell, an upper connecting rod and a lower connecting rod; two ends of the upper connecting rod and the lower connecting rod are respectively hinged with the lower shell and the bracket to form a hinge four-bar mechanism; the upper driving piston is fixedly arranged on the bracket, and a piston rod of the upper driving piston is hinged with the upper connecting rod; the lower driving piston is arranged in the lower shell, and a piston rod of the lower driving piston is vertically arranged downwards; the hydraulic system is used to control the upper and lower drive pistons. The invention can avoid the problem of vehicle sliding of special vehicles in the airport, thereby avoiding the occurrence of safety accidents caused by vehicle sliding.)

1. Vehicle automatic wheel keeps off prevents swift current car device, its characterized in that includes:

a bracket fixed above a vehicle chassis;

the wheel block unit comprises a lower shell, an upper connecting rod and a lower connecting rod; the upper connecting rod, the bracket, the lower connecting rod and the lower shell are sequentially hinged to form a hinge four-bar mechanism;

the upper driving piston is fixedly arranged on the bracket, and a piston rod of the upper driving piston is hinged with the upper connecting rod;

the lower driving piston is arranged in the lower shell, and a piston rod of the lower driving piston is vertically arranged downwards;

a hydraulic system for controlling the upper drive piston and the lower drive piston.

2. The automatic wheel chock anti-roll device for a vehicle according to claim 1, wherein:

the number of the wheel block units is two, and the two wheel block units are symmetrically arranged on two sides of the tire.

3. The automatic wheel chock anti-roll device for a vehicle according to claim 1, wherein:

one side of the lower shell facing the tire is an arc-shaped surface.

4. The vehicle automatic wheel chock anti-roll device according to claim 1, wherein said hydraulic system comprises:

the input end of the hydraulic pump is connected with a hydraulic oil tank, and the output end of the hydraulic pump is connected with a P port of the three-position four-way hydraulic valve through an overflow valve;

the T port of the three-position four-way hydraulic valve is connected with the hydraulic oil tank; the port A of the three-position four-way hydraulic valve is directly connected with the plug cavity of the upper driving piston and is connected with the plug cavity of the lower driving piston through a one-way throttle valve; and the port B of the three-position four-way hydraulic valve is directly connected with the rod cavity of the lower driving piston and is connected with the rod cavity of the upper driving piston through a one-way throttle valve.

5. The automatic wheel chock anti-roll device for a vehicle according to claim 4, wherein:

the one-way throttle valve is composed of a one-way valve and an overflow valve which are combined in parallel.

6. The automatic wheel chock anti-roll device for a vehicle according to claim 1, wherein:

and a gasket is arranged at the lower end of the piston rod of the lower driving piston.

Technical Field

The invention relates to the technical field of vehicle anti-sliding devices, in particular to an automatic wheel chock anti-sliding device for a vehicle.

Background

In an airport, a plurality of special vehicles are usually used on the airport apron for operation, and common special vehicles comprise ferry vehicles, passenger ladder vehicles, luggage tractors, refueling trucks and the like. For an airport, the safety of an airport apron and an airplane is placed at the head, and if a special vehicle rolls down during parking operation, safety accidents can be caused. Therefore, in an environment where a plurality of special vehicles are required to work, airport workers generally use the anti-rolling device to make the special vehicles immovable in order to prevent the vehicles from rolling and avoid safety accidents.

The conventional anti-sliding device is fixed, the anti-sliding device is installed at a fixed position on the ground, and each parking space is provided with one anti-sliding device; one is movable, and the anti-sliding device is manually placed after the vehicle stops; and the device is also of an iron shoe type, and can be provided with an automatic lowering iron shoe type anti-sliding device on special scenes such as rail vehicles.

However, due to the particularity of the operation of the apron, the existing anti-rolling device has some problems when being used on the apron. For the fixed type anti-sliding device, because the parking position of the vehicle operated on the terrace is often not fixed, the existing ground fixed type anti-sliding device can not move along with the vehicle, and if a plurality of anti-sliding devices are arranged on the terrace, the sliding of the airplane on the terrace can be influenced, so the fixed type anti-sliding device is not suitable for being used on the terrace. For the movable anti-sliding device, airport personnel are required to manually place the anti-sliding device at the wheel of the airport special vehicle, the airport anti-sliding device is dangerous when facing large airport special vehicles, secondly, along with the acceleration of the subsequent airport unmanned reform process, the airport is basically unmanned, the anti-sliding device can be placed without manpower, and the automation needs to be completely realized. To the swift current car device is prevented to skate formula, at present generally be applied to under this kind of special scene of track, it is through depending on atmospheric pressure with the skate card income wheel and track between, but if use on the airport special type vehicle, the vehicle smooth trend can appear and make the wheel grow to skate pressure, the problem that the skate is difficult to pack up.

Disclosure of Invention

Based on the technical problems, the invention provides the vehicle sliding prevention device for the automatic wheel chock of the vehicle, which avoids the problem of sliding of special vehicles in airports, thereby avoiding the occurrence of safety accidents caused by sliding of the vehicles.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

the anti-sliding device for the automatic wheel chock of the vehicle comprises a bracket, a wheel chock unit, an upper driving piston, a lower driving piston and a hydraulic system; the bracket is fixed on the vehicle chassis; the wheel block unit comprises a lower shell, an upper connecting rod and a lower connecting rod; the upper connecting rod, the bracket, the lower connecting rod and the lower shell are sequentially hinged to form a hinge four-bar mechanism; the upper driving piston is fixedly arranged on the bracket, and a piston rod of the upper driving piston is hinged with the upper connecting rod; the lower driving piston is arranged in the lower shell, and a piston rod of the lower driving piston is vertically arranged downwards; the hydraulic system is used to control the upper and lower drive pistons.

Furthermore, the number of the wheel chock units is two, and the two wheel chock units are symmetrically arranged on two sides of the tire.

Furthermore, one side of the lower placing shell facing the tire is an arc-shaped surface.

Further, the hydraulic system comprises a hydraulic pump and a three-position four-way hydraulic valve; the input end of the hydraulic pump is connected with a hydraulic oil tank, and the output end of the hydraulic pump is connected with a P port of the three-position four-way hydraulic valve through an overflow valve; the T port of the three-position four-way hydraulic valve is connected with a hydraulic oil tank; the port A of the three-position four-way hydraulic valve is directly connected with a plug cavity of the upper driving piston and is connected with a plug cavity of the lower driving piston through a one-way throttle valve; the port B of the three-position four-way hydraulic valve is directly connected with the rod cavity of the lower driving piston and is connected with the rod cavity of the upper driving piston through a one-way throttle valve.

Furthermore, the one-way throttle valve is composed of a one-way valve and an overflow valve which are combined in parallel.

Furthermore, a gasket is arranged at the lower end of the piston rod of the lower driving piston.

Compared with the prior art, the invention has the beneficial effects that:

the automatic wheel chock anti-sliding device for the vehicle is arranged on a special vehicle in an airport, so that the automatic wheel chock anti-sliding device can be placed and retracted at any time in all places including flat ground and a ramp, and is not limited by the place where the vehicle is located. Therefore, the problem of vehicle sliding of special vehicles in airports can be avoided at any time and any place, and safety accidents caused by vehicle sliding are avoided.

Drawings

The present application will be further explained by way of exemplary embodiments, which will be described in detail by way of the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an automatic wheel chock anti-rolling device for a vehicle.

FIG. 2 is a schematic view of the automatic wheel chock anti-slide device of the vehicle in a retracted state.

FIG. 3 is a schematic view of the structure of the automatic wheel chock anti-slipping device of the vehicle in a downward state.

Fig. 4 is a schematic structural diagram of the hydraulic system.

The hydraulic control system comprises an upper driving piston 1, a support 2, a wheel stopper unit 3, an upper connecting rod 301, a lower connecting rod 302, a lower shell 303, a lower driving piston 4, a gasket 401, tires 5, a hydraulic pump 6, a three-position four-way hydraulic valve 7, an overflow valve 8, a check valve 9 and a hydraulic oil tank 10.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.

Fig. 1 to 4 are schematic structural views of an anti-rolling device for an automatic wheel block of a vehicle according to some embodiments of the present application, and the anti-rolling device for an automatic wheel block of a vehicle according to the present application will be described with reference to fig. 1 to 4. It should be noted that fig. 1-4 are only examples and are not intended to limit the specific shape and structure of the automatic wheel-block anti-roll device.

Referring to fig. 1 to 3, in some embodiments, an automatic wheel chock anti-slipping device for a vehicle includes a bracket 2, a wheel chock unit 3, an upper driving piston 1, a lower driving piston 4, and a hydraulic system; the wheel chock unit 3 includes a lower case 303, an upper link 301, and a lower link 302; two ends of the upper connecting rod 301 and the lower connecting rod 302 are respectively hinged with the lower shell 303 and the bracket 2 to form a hinge four-bar mechanism; the upper driving piston 1 is fixedly arranged on the bracket 2, and a piston rod of the upper driving piston 1 is hinged with the upper connecting rod 301; the lower driving piston 4 is installed in the lower casing 303, and a piston rod of the lower driving piston 4 is vertically arranged downwards; the hydraulic system is used to control the upper drive piston 1 and the lower drive piston 4.

Wherein, its working process of vehicle automatic wheel fender anti-rolling device is: first, the hydraulic system controls the upward extension of the piston rod of the upper drive piston 1. Because the upper connecting rod 301, the lower connecting rod 302, the lower shell 303 and the support 2 are hinged to form a hinged four-bar mechanism, the piston rod of the upper driving piston 1 stirs the upper connecting rod 301 to enable the lower shell 303 to move, at the moment, due to the characteristics of the hinged four-bar mechanism, the moving direction of the lower shell 303 moves towards the direction of 'being close to a tire' and 'being close to the ground' until the side surface of the lower shell 303 is attached to the tire 5 and is not movable.

Specifically, the hinged four-bar mechanism formed by the upper link 301 and the lower link 302, both ends of which are respectively hinged with the lower casing 303 and the bracket 2, is specifically a quadrilateral four-bar mechanism.

After the side surface of the lower shell 303 is tightly attached to the tire 5 and cannot move, the hydraulic system automatically rotates to drive the piston rod of the lower driving piston 4 to move downwards to be contacted with the ground and cannot move, and thus the automatic wheel block anti-sliding device of the vehicle is automatically placed.

Before a special vehicle in an airport runs, the automatic wheel guard anti-sliding device of the vehicle needs to be folded, and the folding process is just opposite to the placing process. The hydraulic system controls the lower driving piston 4 to retract and be separated from the ground, after the lower driving piston 4 retracts completely and cannot move, the hydraulic system automatically controls the upper driving piston 1 to retract so that the lower casing 303 is separated from the tire 5 until the upper driving piston 1 retracts completely and cannot move.

Referring to fig. 2 to 3, it can be seen from the working process of the automatic wheel guard anti-slipping device for the vehicle, when the automatic wheel guard anti-slipping device for the vehicle is placed, the upper driving piston 1 firstly generates displacement, and after the lower placing shell 303 contacts the tire 5 to stop the displacement, the lower driving piston 4 generates displacement and contacts the ground; when the automatic wheel block anti-sliding device of the vehicle is folded, the hydraulic system works reversely, the lower driving piston 4 firstly moves reversely to leave the ground, and then the upper driving piston 1 moves reversely to return to the initial position to enable the lower shell 303 to leave the tire 5, so that the step-by-step lowering and folding processes of the wheel block are realized.

The mode that the automatic wheel guard of the vehicle is arranged to prevent the sliding device can avoid the resistance generated by the friction between the ground and the tire 5, which can be met in the process of releasing and retracting the automatic wheel guard of the vehicle, and the problem that the releasing shell 303 cannot be automatically retracted due to the increased pressure of the automatic wheel guard of the vehicle when the vehicle has the sliding trend can be solved.

Specifically, the whole set of automatic wheel chock anti-sliding device for the vehicle is fixedly arranged on a vehicle chassis through the support 2, the mounting mode is not limited, and only the device needs to be fixed relative to the vehicle body and leave a space for lifting and placing the wheel chock.

Specifically, the upper drive piston 1 and the lower drive piston 4 are similar in structure to the hydraulic cylinder.

Preferably, the number of the wheel chock units 3 is two, and the two wheel chock units 3 are symmetrically arranged on two sides of the tire 5. Through two wheel chock units 3, the effect of preventing the vehicle from sliding can be achieved on the two sides of the tire 5, the anti-sliding acting force on the tire 5 is enhanced, and the effect of preventing the vehicle from sliding is improved.

Preferably, the side of lower housing 303 facing tire 5 is an arc-shaped surface. The casing 303 of transferring of arcwall face can laminate tire 5, improves the contact surface of transferring casing 303 and tire 5, and the frictional force between casing 303 and the tire 5 is transferred in the reinforcing, further improves and prevents the swift current car effect.

Preferably, the lower end of the piston rod of the lower drive piston 4 is provided with a gasket 401. The gasket 401 can increase the contact area between the lower driving piston 4 and the ground, enhance the friction force between the lower driving piston 4 and the ground, and further improve the anti-sliding effect.

Specifically, the anti-sliding device for the automatic wheel chock of the vehicle further comprises a control system for controlling the hydraulic system, and the control system is convenient to operate and can be connected to a vehicle-mounted system of the special vehicle in the airport.

Referring to fig. 4, in some embodiments, the hydraulic system includes a hydraulic pump 6 and a three-position, four-way hydraulic valve 7; the input end of the hydraulic pump 6 is connected with a hydraulic oil tank 10, and the output end of the hydraulic pump is connected with a P port of the three-position four-way hydraulic valve 7 through an overflow valve 8; the T port of the three-position four-way hydraulic valve 7 is connected with a hydraulic oil tank 10; the port A of the three-position four-way hydraulic valve 7 is directly connected with the plug cavity of the upper driving piston 1 and is connected with the plug cavity of the lower driving piston 4 through the one-way throttle valve 7; the port B of the three-position four-way hydraulic valve 7 is directly connected with the rod cavity of the lower driving piston 4 and is connected with the rod cavity of the upper driving piston 1 through a one-way throttle valve.

Wherein, for the upper drive piston 1 and the lower drive piston 4, the part with the piston rod in the piston cavity is called the rod cavity, and the part without the piston rod is called the plug cavity.

The three-position four-way hydraulic valve 7 can control the communication relation of a port P, a port T, a port A and a port B in the three-position four-way hydraulic valve 7 by switching the position of a valve core. Thereby, the movement of the upper driving piston 1 and the lower driving piston 4 can be controlled.

After the vehicle stops, the hydraulic pump 6 supplies hydraulic oil to the three-position four-way hydraulic valve 7, firstly, the port P of the three-position four-way hydraulic valve 7 is adjusted to be communicated with the port A, the hydraulic oil directly enters a plug cavity of the upper driving piston 1, then a piston rod of the upper driving piston 1 is driven to extend out, and the upper driving piston 1 firstly generates displacement to enable the wheel chock unit 3 to be lowered to be close to the tire 5; when the lower shell 303 of the wheel chock unit 3 is tightly contacted with the tire 5 and can not move, namely the upper driving piston 1 can not generate displacement, the volume of a hydraulic circuit can not be further changed, at the moment, the continuous operation of the hydraulic pump 6 causes the pressure of the hydraulic circuit to be increased, so that the one-way throttle valve connected with the lower driving piston 4 is opened to enable hydraulic oil to enter a plug cavity of the lower driving piston 4, and further, a piston rod of the lower driving piston 4 is driven to extend out, so that the lower driving piston 4 is contacted with the ground; and finally, adjusting a port P of the three-position four-way hydraulic valve 7 to be communicated with a port T, and closing the port A and the port B at the moment so as to maintain the current states of the upper driving piston 1 and the lower driving piston 4 and realize the operation of the automatic wheel-gear anti-sliding device of the vehicle in a long-time parking state.

When the automatic wheel chock anti-sliding device of the vehicle is retracted, the port P of the three-position four-way hydraulic valve 7 is adjusted to be communicated with the port B, hydraulic oil directly enters a rod cavity of the lower driving piston 4 to further drive a piston rod of the lower driving piston 4 to retract, and the lower driving piston 4 firstly generates displacement to be separated from the ground; after the lower driving piston 4 is completely retracted and cannot generate displacement, the volume of the hydraulic circuit cannot be further changed, and at the moment, the pressure of the hydraulic circuit is increased due to the continuous operation of the hydraulic pump 6, so that the one-way throttle valve connected with the upper driving piston 1 is opened to enable hydraulic oil to enter the rod cavity of the upper driving piston 1, and then the piston rod of the upper driving piston 1 is driven to retract, and the wheel block unit 3 is separated from the tire 5; and finally, adjusting a port P of the three-position four-way hydraulic valve 7 to be communicated with a port T, and closing the port A and the port B at the moment so as to maintain the current states of the upper driving piston 1 and the lower driving piston 4 and realize that the automatic wheel-block anti-slipping device of the vehicle keeps a retracted state in a driving state.

Thus, the stepwise control of the upper drive piston 1 and the lower drive piston 4 can be automatically realized in the entire hydraulic system.

Specifically, the one-way throttle valve is composed of a one-way valve 9 and an overflow valve 8 which are combined in parallel. The pressure value of the overflow valve in the single-term throttle valve is smaller than that of the safe overflow valve used at the side close to the pump.

The above is an embodiment of the present invention. The embodiments and specific parameters in the embodiments are only used for clearly illustrating the verification process of the invention and are not used for limiting the patent protection scope of the invention, which is defined by the claims, and all the equivalent structural changes made by using the contents of the description and the drawings of the present invention should be included in the protection scope of the present invention.