CN210555205U

CN210555205U - Vehicle with a steering wheel

Info

Publication number: CN210555205U
Application number: CN201921196309.7U
Authority: CN
Inventors: 苏俊收; 王绍腾; 高磊磊
Original assignee: Jiangsu Xugong Construction Machinery Research Institute Co ltd
Current assignee: Jiangsu Xugong Construction Machinery Research Institute Co ltd
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-05-19
Anticipated expiration: 2029-07-29

Abstract

The utility model relates to a vehicle, vehicle includes: a frame; a cab (1) rotatably mounted on the frame; and a pneumatic artificial muscle device (2) for driving the cab (1) to rotate relative to the frame so as to lift the cab (1). Use the technical scheme of this application, the vehicle adopts pneumatic artificial muscle device to lift the driver's cabin to there is hydraulic pressure pulsation's problem in the system that the drive driver's cabin that exists among the prior art lifts has been improved.

Description

Vehicle with a steering wheel

Technical Field

The utility model relates to a mechanical equipment field particularly, relates to a vehicle.

Background

In the related art, a cab of a work vehicle (e.g., a skid steer loader) is generally lifted to facilitate servicing of relevant parts of the work vehicle. The lifting of the cab is related to the life safety of an operator, so a safe and reliable device is very important. Today's domestic skid-steer loader does not have the lifting device a bit, or adopts hydraulic pressure to lift a bit, must will connect driver's cabin and suspended bolt earlier and twist off when lifting the driver's cabin, therefore there is the problem that wastes time and energy in the operation process, is difficult to intelligent control, has certain risk, and skid-steer loader driver's cabin travelling comfort is poor moreover, and hydraulic pressure lifting device can't carry out the auxiliary stay to the driver's cabin, has reduced the stability of driver's cabin.

Fig. 1 shows a related art work vehicle, and fig. 2 shows a schematic configuration of a cab lift system of the related art work vehicle. Referring to fig. 1 and 2, the hydraulic lifting system for the driver's cab of the automobile comprises a hydraulic oil tank 1, a hydraulic oil pump 2, a control handle 3, a hydraulic distributor 4, an auxiliary oil cylinder 5, an auxiliary oil cylinder piston rod 7, a pressure lever 6, a lifting oil cylinder 8, a lifting oil cylinder piston rod 9, a fixed seat 10, a high-pressure oil pipeline 11,

check valves

12 and 13, and a low-pressure oil pipeline 14, wherein the hydraulic oil pump 2 can be a steering power-assisted oil pump or a dump oil pump of the automobile, the output end of the hydraulic oil pump is communicated with the lower part of a cylinder barrel of the lifting oil cylinder 8 through the hydraulic distributor via the high-pressure oil pipeline 11, the lifting oil cylinder 8 is arranged below the driver's cab 15, the lower part of the cylinder barrel is hinged on; the lower part of the cylinder barrel of the auxiliary oil cylinder 5 is communicated with the hydraulic oil tank 1 through a low-pressure oil pipeline 14 and a one-way valve 12, and is communicated with the lower part of the cylinder barrel of the lifting oil cylinder 8 through a high-pressure oil pipeline 11 and a one-way valve 13, the auxiliary oil cylinder is also arranged on a fixed seat 10 connected with a vehicle body, the upper end of a piston rod 7 of the auxiliary oil cylinder is hinged with a pressure lever 6, and a fulcrum of the pressure lever 6 is arranged on the fixed seat 10.

The working principle is as follows: when the vehicle can be started, the control handle 3 is moved, high-pressure oil output by the hydraulic oil pump 2 of the vehicle is sent into a cylinder barrel of the lifting oil cylinder 8 through the hydraulic distributor 4 and the high-pressure oil pipeline 11, the high-pressure oil jacks up the piston rod 9, and therefore a cab 15 hinged with the piston rod 9 is jacked up, and the lifting oil cylinder 8 is hinged with the cab 15 and the fixed seat 10 up and down, so that the cab 15 can be inclined (opened) to one side. When the vehicle cannot be started, the auxiliary lifting device, namely the pressure lever 6 is manually pressed, the pressure lever 6 is lifted, the auxiliary oil cylinder piston rod 7 is lifted, hydraulic oil enters the auxiliary oil cylinder 5 through the one-way valve 12, and the one-way valve 13 is closed; the pressure lever 7 is pressed down, the one-way valve 12 is closed, the one-way valve 13 is opened, hydraulic oil enters the cylinder barrel of the lifting oil cylinder 8 through the high-pressure oil pipeline 11, and the operation is repeated in such a way that the high-pressure oil entering the cylinder barrel of the lifting oil cylinder 8 jacks up the piston rod 9, so that a cab 15 hinged with the piston rod 9 is jacked up, and the lifting operation is completed; when the cab 15 is put down, the control handle 3 is only required to be moved, the hydraulic distributor 4 is opened, and the piston rod 9 of the lifting oil cylinder 8 is pressed down by the dead weight of the cab 15, so that the cab 15 is automatically returned.

The existing hydraulic cab lifting system has hydraulic pulsation, the lifting process is not stable enough, the lifting time is long, and the speed and the position can not be accurately controlled. The lifting device cannot play a role in buffering the cab during the running of the skid-steer loader and cannot assist in supporting the cab. In order to lift the cab, a hydraulic source needs to be specially arranged, the structure and the cost are additionally increased, and a cab lifting device for the skid steer loader is urgently needed to solve the problems.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a vehicle to improve the problem of hydraulic pulsation in a system for driving a cab to lift, which is present in the related art.

According to an aspect of the embodiment of the utility model provides a vehicle, the vehicle includes:

a frame;

a cab rotatably mounted on the frame; and

and the pneumatic artificial muscle device is used for driving the cab to rotate relative to the frame so as to lift the cab.

Optionally, the pneumatic artificial muscle device comprises a contraction type pneumatic artificial muscle device for pulling the cab to rotate relative to the frame.

Optionally, the pneumatic artificial muscle device comprises:

an elastic tubular member having an air inlet; and

and the flexible wrapping component is wrapped on the periphery of the elastic tubular component.

Optionally, the resilient tubular member comprises a rubber tube.

Optionally, the flexible wrapping member comprises:

a first string-like member spirally extending in a first direction in a circumferential direction of the elastic tubular member; and

and a second string-shaped member spirally extending in a second direction in a circumferential direction of the elastic tubular member, the first direction being opposite to the second direction, so that the first string-shaped member and the second string-shaped member intersect to form a net structure.

Optionally, the vehicle further comprises:

the air source is used for providing air for the pneumatic artificial muscle device; and

a flow control valve comprising an inlet in communication with an air source and an outlet in communication with a pneumatic artificial muscle device; and

and the controller is connected with the flow control valve.

Optionally, the controller comprises a pulse signal output terminal connected to the flow control valve.

Optionally, the vehicle further comprises a displacement detection unit for detecting a displacement of the pneumatic artificial muscle device, the displacement detection unit is connected with the controller, and the control valve controls the flow control valve according to the position of the pneumatic artificial muscle device detected by the detection unit.

Optionally, the vehicle further comprises a pressure detection component for detecting the pressure of the gas output by the gas source, and the controller is connected with the pressure detection component to monitor the pressure of the gas source.

Optionally, the flow control valve comprises a proportional valve.

Use the technical scheme of this application, the vehicle adopts pneumatic artificial muscle device to lift the driver's cabin to there is hydraulic pressure pulsation's problem in the system that the drive driver's cabin that exists among the prior art lifts has been improved.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 shows a schematic structural view of a cab of a related art vehicle;

fig. 2 is a schematic view showing a structure of a hydraulic system for driving a cab of a vehicle of the related art to roll;

fig. 3 shows a schematic structural view of a vehicle of an embodiment of the present invention;

fig. 4 shows a schematic structural view of a pneumatic artificial muscle device for driving a cab of a vehicle to turn according to an embodiment of the present invention;

fig. 5 shows a schematic structural view of another state of the pneumatic artificial muscle apparatus of the vehicle of the embodiment of the present invention;

fig. 6 shows a schematic view of the internal structure of a pneumatic artificial muscle device of a vehicle according to an embodiment of the present invention; and

fig. 7 shows a schematic diagram of a system for driving cab tilting of a vehicle according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Fig. 3 shows a schematic structural diagram of a cab of a vehicle according to an embodiment of the present invention, as shown in fig. 3, the vehicle of the present invention includes a frame, a cab 1 rotatably mounted on the frame of the vehicle, and a pneumatic artificial muscle device 2 for driving the cab 1 to rotate relative to the frame.

In the embodiment, the vehicle adopts the pneumatic artificial muscle device 2 to drive the cab 1 to rotate relative to the vehicle frame so as to lift the cab 1, thereby improving the problem of hydraulic pulsation of a system for driving the cab to rotate in the prior art.

In the present embodiment, the pneumatic artificial muscle device 2 includes a contraction type pneumatic artificial muscle device for pulling the cab 2 to rotate relative to the vehicle frame.

The front part of the cab 1 is connected to the frame by a first hinge member so that the cab 1 can be rotated relative to the frame. The first end of the pneumatic artificial muscle device 2 is connected to the cab 1 by a second articulation. The second end of the pneumatic artificial muscle device 2 is connected with the frame at the rear part of the cab. The body of the cab 1 and the second articulated part are located on either side of the first articulated part, respectively, so that the pneumatic artificial muscle device drives the body of the cab up when it is retracted.

As shown in fig. 4 to 6, the pneumatic artificial muscle device 2 includes an elastic tubular member 3 having an air inlet and a flexible wrapping member 4 wrapped around the outer circumference of the elastic tubular member 3.

In some embodiments, the elastic tubular member 3 comprises a rubber tube.

As shown in conjunction with fig. 4 to 6, the flexible wrapping member 4 includes a first string-like member 4a and a second string-like member 4b, the first string-like member 4a extending spirally in a first direction in a circumferential direction of the elastic tubular member 3; the second string-like members 4b spirally extend in the circumferential direction of the elastic tubular member 3 in a second direction, which is opposite to the first direction, so that the first string-like members 4a and the second string-like members 4b intersect to form a net structure.

Alternatively, the first and second string-

like members

4a and 4b are high-strength fibers.

The pneumatic artificial muscle device 2 further comprises a connection end 5 for connecting the cab 1 or the frame.

The pneumatic artificial muscle device mainly comprises three parts, namely a rubber tube, a net structure woven by high-strength fibers and a connecting end 5. The rubber tube is a thin-wall hollow tube with one end sealed and the other end provided with a vent hole, and is made of special material with good elasticity. When compressed air with certain pressure is introduced into the rubber tube, the rubber tube expands in the radial direction. The net structure is made of high-strength fiber material with certain flexibility and is attached to the outer side of the rubber tube in a mode of a plurality of layers of positive and negative spirals to form a thin-wall cylinder similar to the rubber tube.

When the elastic tubular part 3 of the pneumatic artificial muscle device 2 is inflated, the elastic tubular part 3 begins to deform and expand, the rigidity of the flexible wrapping part 4 made of fiber materials is higher than that of the elastic tubular part 3, and therefore the constraint of the flexible wrapping part 4 on the elastic tubular part 3 enables the pneumatic artificial muscle device to expand in the radial direction and contract in the axial direction. Conversely, when the gas in the elastic tubular member 3 is exhausted, the elasticity of the flexible wrapping member 4 forces the pneumatic artificial muscle to return to the original shape, i.e., the pneumatic artificial muscle device is elongated.

In other embodiments, pneumatic artificial muscle device 2 comprises an extensible pneumatic artificial muscle device. One end of the extensible pneumatic artificial muscle device is connected with the cab 1, the other end of the extensible pneumatic artificial muscle device is connected with the frame, and the pneumatic artificial muscle device drives the cab 1 to rotate relative to the frame when being extended.

As shown in fig. 7, in this embodiment, the vehicle further comprises a gas source 11 for supplying gas to the pneumatic artificial muscle device and a flow control valve 7, and the flow control valve 7 comprises an inlet communicated with the gas source 11 and an outlet connected with the pneumatic artificial muscle device 2. The flow control valve 7 is used for controlling parameters such as air inflow and air inflow speed of the pneumatic artificial muscle device 2.

The vehicle further comprises

control valves

8a and 8b, and the controller is connected with the flow control valve 7 to control parameters such as air inflow and air inflow speed of the pneumatic artificial muscle device 2 through controlling the flow control valve 7, so as to control the movement of the pneumatic artificial muscle device 2.

Wherein, the controller includes host computer 8a and with host computer 8a communication connection's host computer 8 b. The lower machine 8a is connected to the flow control valve 7 to control the flow control valve 7. Optionally, the lower computer 8a is a PLC. Optionally, the upper computer 8b is an industrial personal computer or a PC.

Preferably, the flow control valve 7 is a proportional valve.

The control system of the pneumatic artificial muscle device 2 consists of a PLC and a proportional valve; the load of the pneumatic artificial muscle device is the cab 1. The pneumatic artificial muscle device is an executive element of the dynamic system and is also a controlled object of the system. The signal generated by the PLC controls the opening/closing state of the proportional valve to achieve the purpose of controlling the air inlet pressure of the pneumatic artificial muscle device 2, thereby realizing the control of the working frequency, the contraction quantity and the driving force of the pneumatic artificial muscle device. The operating frequency control can be directly controlled by the frequency of the PLC output pulses.

There are two main control factors associated with the amount of contraction of the pneumatic artificial muscle device 2: one is the inflation pressure and the other is the inflation time. The former can be directly adjusted by a pressure adjusting valve, and the latter is mainly realized by controlling the duty ratio of a PLC pulse signal. The position of the lifting device is feedback controlled by a displacement sensor.

The output signal of the PLC is converted into a pulse voltage signal and then enters a high-speed proportional valve, and the high-speed proportional valve controls the driving characteristic of the pneumatic artificial muscle by changing the gas flow flowing through the pneumatic artificial muscle accommodating cavity. The pneumatic artificial muscle is a driving element of the system and is also a controlled object of the system, and the purpose of control is to hope that the pneumatic artificial muscle can output displacement, frequency and driving force to meet the working requirement of lifting.

In this embodiment, the lower computer 8a has a pulse signal output terminal connected to the flow control valve 7 to control the flow rate of the flow control valve 7 by the duty ratio of the pulse signal and the intensity of the pulse signal.

The vehicle further comprises a displacement detection means 6 for detecting a displacement of the pneumatic artificial muscle device 2, the displacement detection means 6 being connected to a controller, the controller controlling the flow control valve 7 in dependence of the displacement of the pneumatic artificial muscle device 2 detected by the displacement detection means 6.

The vehicle further comprises a pressure detection means 12 for detecting the pressure of the gas output by the gas source 11. The pressure sensing component 12 is connected to the controller so that the controller monitors the pressure of the gas source 11.

The vehicle further includes an analog-to-digital converter 13 for converting an analog signal output from the displacement detecting means 6 and/or the pressure detecting means 12 into a digital signal.

In this embodiment, the displacement detecting means 6 and the pressure detecting means 12 are connected to the upper computer 8 b. The analog-to-digital converter 13 includes a signal input terminal connected to the displacement detecting part 6 and/or the pressure detecting part 12 and a signal output terminal connected to the controller.

In other embodiments, the displacement sensing component 6 and/or the pressure sensing component 12 are coupled to the lower computer 8 a. The lower computer 8a controls the flow control valve 7 according to the signal detected by the displacement detecting part 6 and is used for monitoring the pressure of the air source 11.

The vehicle further includes a gas tank 9 and a gas flow dividing member 10. The flow diversion component 10 includes an inlet in communication with the gas source 11, a first outlet in communication with the inlet of the flow control valve 8, and a second outlet in communication with the gas reservoir 9.

In other embodiments, a gas reservoir 9 communicates with the inlet of the flow control valve 7 to provide gas to the pneumatic artificial muscle device 6.

Compared with the prior art, the embodiment has the following advantages:

1. hydraulic sources are reduced, the skid steer loader system saves energy, reduces cost, eliminates hydraulic pulsation, and improves the stability of the lifting process.

2. The auxiliary support of the cab is increased, and the impact resistance and the smoothness of the cab are improved.

3. Cab lifting can achieve accurate control of speed and position.

The above description is only exemplary embodiments of the present invention, and should not be construed as limiting the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vehicle, characterized by comprising:

a frame;

a cab (1) rotatably mounted on the frame; and

a pneumatic artificial muscle device (2) for driving the cab (1) to rotate relative to the frame for lifting the cab (1).

2. Vehicle according to claim 1, characterized in that said pneumatic artificial muscle device (2) comprises a contraction-type pneumatic artificial muscle device for pulling said cab (1) in rotation with respect to said frame.

3. Vehicle according to claim 1, characterized in that said pneumatic artificial muscle device (2) comprises:

an elastic tubular member (3) having an air inlet; and

and the flexible wrapping component (4) is wrapped on the periphery of the elastic tubular component (3).

4. Vehicle according to claim 3, characterized in that the elastic tubular part (3) comprises a rubber tube.

5. Vehicle according to claim 3, characterized in that said flexible wrapping member (4) comprises:

a first string-like member (4a) extending spirally in a first direction in a circumferential direction of the elastic tubular member (3); and

a second string-like member (4b) extending spirally in a second direction in the circumferential direction of the elastic tubular member (3), the first direction being opposite to the second direction, so that the first string-like member (4a) and the second string-like member (4b) intersect to form a net structure.

6. The vehicle of claim 1, further comprising:

a gas source (11) for providing gas to the pneumatic artificial muscle device (2); and

a flow control valve (7) comprising an inlet in communication with the gas source (11) and an outlet in communication with the pneumatic artificial muscle device (2); and

and controllers (8a, 8b) connected to the flow control valve (7).

7. Vehicle according to claim 6, characterized in that the controller (8a, 8b) comprises a pulse signal output terminal which is connected with the flow control valve (7).

8. Vehicle according to claim 6, characterized in that it further comprises displacement detection means (6) for detecting the displacement of the pneumatic artificial muscle device (2), said displacement detection means (6) being connected to said controller (8a, 8b), said control valve (8a, 8b) controlling said flow control valve (7) according to the position of the pneumatic artificial muscle device (2) detected by said detection means (6).

9. The vehicle of claim 6, further comprising a pressure detection component (12) for detecting a pressure of gas output by the gas source (11), the controller (8a, 8b) being connected to the pressure detection component (12) to monitor the pressure of the gas source (11).

10. A vehicle according to claim 6, characterised in that the flow control valve (7) comprises a proportional valve.