CN110282032A - Cab lifting system and vehicle - Google Patents

Abstract

The present invention relates to a kind of cab lifting system and vehicle, cab lifting system includes: Pneumatic artificial muscle device (2), for driving driver's cabin (1) to rotate relative to vehicle frame, to lift the driver's cabin (1)；And gas source (11), it is connected to the Pneumatic artificial muscle device (2), for providing gas for the Pneumatic artificial muscle device (2).Using the technical solution of the application, vehicle lifts driver's cabin using Pneumatic artificial muscle device, and the system so as to improve driving driver's cabin lifting existing in the prior art has hydraulic pulsation.

Description

Cab lift systems and vehicles

technical field

The present invention relates to the field of mechanical equipment, in particular, to a cab lifting system and a vehicle.

Background technique

In the related art, the cab of an engineering vehicle (such as a skid steer loader) can usually be lifted to facilitate the maintenance of related parts of the engineering vehicle. The lifting of the cab is related to the life safety of the operator, so a safe and reliable device is very important. Nowadays, some domestic skid steer loaders do not have a lifting device, or some use hydraulic lifting. When lifting the cab, the bolts connecting the cab and the suspension must be unscrewed first. Therefore, there is a problem of time-consuming and laborious operation during the operation, and it is difficult to Intelligent control has certain risks, and the cab of the skid steer loader has poor comfort, and the hydraulic lifting device cannot assist the cab, which reduces the stability of the cab.

FIG. 1 shows a related art engineering vehicle, and FIG. 2 shows a schematic structural diagram of a cab lift system of the related art engineering vehicle. Combined with Figures 1 and 2, the hydraulic car cab lifting system includes 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, The lift cylinder piston rod 9, the fixed seat 10, the high-pressure oil pipeline 11, the one-way valves 12 and 13, and the low-pressure oil pipeline 14 are constituted. The hydraulic oil pump 2 can be a steering booster oil pump or a self-unloading oil pump of the vehicle itself. The high-pressure oil pipeline 11 is communicated with the lower part of the cylinder barrel of the lift cylinder 8 through the hydraulic distributor. The lift cylinder 8 is placed under the cab 15, and the lower part of the cylinder is hinged on the fixed seat 10 connected to the vehicle body. The upper end of the rod 9 is hinged with the cab 15; the lower part of the cylinder barrel of the auxiliary oil cylinder 5 is communicated with the hydraulic oil tank 1 through the low pressure oil pipeline 14 and the one-way valve 12, and is connected with the lifting oil cylinder through the high-pressure oil pipeline 11 through the one-way valve 13. The lower part of the cylinder of 8 is connected, the auxiliary oil cylinder is also installed on the fixed seat 10 connected with the vehicle body, the upper end of the piston rod 7 is hinged with the pressure lever 6, and the fulcrum of the pressure lever 6 is installed on the fixed seat 10.

Working principle: When the vehicle can be started, move the control handle 3, and use the vehicle's own hydraulic oil pump 2 to send the high-pressure oil outputted by the vehicle into the cylinder of the lift cylinder 8 through the hydraulic distributor 4 and the high-pressure oil pipeline 11. The high-pressure oil jacks up the piston rod 9, thereby jacking up the cab 15 hinged with the piston rod 9. Since the lift cylinder 8 is hingedly connected to the cab 15 and the fixed seat 10 up and down, it can follow the cab 15 to one side. Tilt (open). When the vehicle cannot be started, use the auxiliary lifting device, that is, manually press the pressure lever 6, and lift the pressure lever 6 to lift the auxiliary cylinder piston rod 7, and the hydraulic oil enters the auxiliary cylinder 5 through the check valve 12. At this time, the one-way The 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, and the hydraulic oil enters the cylinder of the lifting cylinder 8 through the high-pressure oil pipeline 11. The high-pressure oil inside lifts the piston rod 9, thereby lifting the cab 15 hinged with the piston rod 9 to complete the lifting operation; when putting down the cab 15, just move the control handle 3, open the hydraulic distributor 4, and rely on driving The self-weight of the chamber 15 lifts the piston rod 9 of the oil cylinder 8, 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 position cannot be precisely controlled. The lifting device cannot buffer the cab during the driving of the skid loader, and cannot provide auxiliary support for the cab. In order to lift the cab, a hydraulic source needs to be specially provided, which increases the structure and cost additionally, and a cab lift device for a skid steer is urgently needed to solve the above problems.

SUMMARY OF THE INVENTION

The present invention aims to provide a cab lift system and a vehicle, so as to improve the problem of hydraulic pulsation in the system for driving the cab lift in the related art.

According to an aspect of the embodiments of the present invention, the present invention provides a vehicle, and the cab lift system includes:

a pneumatic artificial muscle device for driving the cab to rotate relative to the frame to lift the cab; and

The air source is in communication with the pneumatic artificial muscle device, and is used for supplying gas for the pneumatic artificial muscle device.

Optionally, the pneumatic artificial muscle device includes a retractable pneumatic artificial muscle device for pulling the cab to rotate relative to the frame.

Optionally, the pneumatic artificial muscle device includes:

an elastic tubular member having an air inlet; and

The flexible wrapping member wraps around the outer periphery of the elastic tubular member.

Optionally, the resilient tubular member comprises a rubber tube.

Optionally, the flexible wrapping member includes:

a first cord-like member extending helically in the circumferential direction of the elastic tubular member in a first direction; and

The second rope-like member extends helically in the circumferential direction of the elastic tubular member along a second direction, and the first direction is opposite to the second direction, so that the first rope-like member and the second rope-like member intersect to form a net-like structure.

Optionally, the cab lift system further includes:

A flow control valve including an inlet in communication with a gas source and an outlet in communication with the pneumatic artificial muscle device; and

The controller is connected to the flow control valve.

Optionally, the controller includes a pulse signal output terminal, and the pulse signal output terminal is connected to the flow control valve.

Optionally, the cab lift system further includes a displacement detection component for detecting the displacement of the pneumatic artificial muscle device, the displacement detection component is connected to the controller, and the control valve controls the flow control according to the position of the pneumatic artificial muscle device detected by the detection component. valve.

Optionally, the cab lift system further includes 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 includes a proportional valve.

According to another aspect of the present invention, there is also provided a vehicle comprising the above-mentioned cab lift system.

By applying the technical solution of the present application, the vehicle adopts a pneumatic artificial muscle device to lift the cab, thereby improving the problem of hydraulic pulsation in the system for driving the cab to lift in the prior art.

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

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

FIG. 1 shows a schematic structural diagram of a cab of a related art vehicle;

FIG. 2 shows a schematic structural diagram of a hydraulic system for driving a cab to turn over in a vehicle of the related art;

FIG. 3 shows a schematic structural diagram of a vehicle according to an embodiment of the present invention;

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

5 shows a schematic structural diagram of another state of the pneumatic artificial muscle device of the vehicle according to the embodiment of the present invention;

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

FIG. 7 shows a schematic diagram of a system for driving a cab to turn over of a vehicle according to an embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the 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 of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within 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 The pneumatic artificial muscle device 2 is used to drive the cab 1 to rotate relative to the frame.

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

In this embodiment, the pneumatic artificial muscle device 2 includes a retractable pneumatic artificial muscle device for pulling the cab 2 to rotate relative to the frame.

The front part of the cab 1 is connected with the frame through a first hinge part, so that the cab 1 can rotate relative to the frame. The first end of the pneumatic artificial muscle device 2 is connected with the cab 1 through a second hinge part. The second end of the pneumatic artificial muscle device 2 is connected to the rear of the cab with the frame. The main body and the second hinge part of the cab 1 are respectively located on two sides of the first hinge part, so when the pneumatic artificial muscle device contracts, the main body of the cab is driven to lift.

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 periphery of the elastic tubular member 3 .

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

4 to 6, the flexible wrapping member 4 includes a first rope-like member 4a and a second rope-like member 4b, and the first rope-like member 4a spirally extends in the circumferential direction of the elastic tubular member 3 along the first direction; The two rope-like members 4b spirally extend in the circumferential direction of the elastic tubular member 3 along a second direction, the first direction being opposite to the second direction, so that the first rope-like member 4a and the second rope-like member 4b intersect to form a net shape structure.

Optionally, the first rope-like member 4a and the second rope-like member 4b are high-strength fibers.

The pneumatic artificial muscle device 2 also includes a connecting end 5 for connecting the cab 1 or the frame.

The pneumatic artificial muscle device is mainly composed of three parts: a rubber tube, a mesh structure woven by high-strength fibers, and a connecting end 5 . The rubber tube is a thin-walled hollow tube with one end sealed and the other end provided with a vent hole. The rubber tube is made of a special material with good elasticity. When a certain pressure of compressed air is introduced into the rubber tube, it will expand in the radial direction. The mesh structure is made of high-strength fiber material with a certain degree of flexibility, and is attached to the outside of the rubber tube in the form of several layers of positive and negative spirals, forming a thin-walled cylinder similar to the rubber tube.

When the elastic tubular member 3 of the pneumatic artificial muscle device 2 is inflated, the elastic tubular member 3 begins to deform and expand, and the rigidity of the flexible wrapping member 4 made of fiber material is greater than that of the elastic tubular member 3. Therefore, the flexible wrapping member 4 restricts the elastic tubular member 3 The pneumatic artificial muscle device is radially expanded and axially contracted. Conversely, when the gas in the elastic tubular member 3 is discharged, the elasticity of the flexible wrapping member 4 forces the pneumatic artificial muscle to return to its original shape, that is, the pneumatic artificial muscle device is elongated.

In other embodiments, the pneumatic artificial muscle device 2 includes a stretchable pneumatic artificial muscle device. One end of the extensible pneumatic artificial muscle device is connected with the cab 1, and the other end is connected with the frame, and the pneumatic artificial muscle device drives the cab 1 to rotate relative to the frame when stretched.

As shown in FIG. 7 , in this embodiment, the vehicle further includes 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 includes an inlet communicated with the gas source 11 and a pneumatic artificial muscle. Outlet to which device 2 is connected. The flow control valve 7 is used to control parameters such as the intake air volume and the intake speed of the pneumatic artificial muscle device 2 .

The vehicle also includes control valves 8a, 8b, and the controller is connected with the flow control valve 7 to control parameters such as the air intake volume and the air intake speed of the pneumatic artificial muscle device 2 by controlling the flow control valve 7, thereby controlling the flow rate of the pneumatic artificial muscle device 2. sports.

The controller includes a lower computer 8a and an upper computer 8b connected to the upper computer 8a in communication. Wherein, the lower computer 8a is connected with 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 computer or a PC.

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

The control system of the pneumatic artificial muscle device 2 is composed of PLC and proportional valve; the load of the pneumatic artificial muscle device is the cab 1 . The pneumatic artificial muscle device is the executive element of the dynamic system and the 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 intake pressure of the pneumatic artificial muscle device 2, so as to control the working frequency, contraction amount and driving force of the pneumatic artificial muscle device. The working frequency control can be directly controlled by the frequency of the PLC output pulse.

There are mainly two control factors related to the contraction amount of the pneumatic artificial muscle device 2: one is the inflation pressure, and the other is the inflation time. The former can be directly debugged by the pressure regulating valve, and the latter is mainly realized by controlling the duty cycle of the PLC pulse signal. The position of the lift is controlled via displacement sensor feedback.

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

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

The vehicle further comprises a displacement detection part 6 for detecting the displacement of the pneumatic artificial muscle device 2, the displacement detection part 6 is connected with the controller, and the controller controls the flow control valve 7 according to the displacement of the pneumatic artificial muscle device 2 detected by the displacement detection part 6 .

The vehicle further includes a pressure detection part 12 for detecting the pressure of the gas output by the gas source 11 . The pressure detection part 12 is connected with the controller, so that the controller can monitor the pressure of the gas source 11 .

The vehicle also includes an analog-to-digital converter 13 for converting the analog signal output by the displacement detection part 6 and/or the pressure detection part 12 into a digital signal.

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

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

The vehicle also includes a gas storage tank 9 and a gas splitting member 10 . The flow dividing member 10 includes an inlet communicated with the gas source 11 , a first outlet communicated with the inlet of the flow control valve 8 , and a second outlet communicated with the gas storage tank 9 .

In other embodiments, the gas tank 9 is in communication with the inlet of the flow control valve 7 to provide gas for the pneumatic artificial muscle device 6 .

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

1. The hydraulic source is reduced, the skid steer system saves energy, reduces costs, eliminates hydraulic pulsation, and improves the stability of the lifting process.

2. The auxiliary support of the cab is added to improve the impact resistance and smoothness of the cab.

3. The cab lift can achieve precise control of speed and position.

The above are only exemplary embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection of the present invention. within the range.

Claims (11)

1. a kind of cab lifting system characterized by comprising

Pneumatic artificial muscle device (2), for driving driver's cabin (1) to rotate relative to vehicle frame, to lift the driver's cabin (1)； And

Gas source (11) is connected to the Pneumatic artificial muscle device (2), for providing for the Pneumatic artificial muscle device (2) Gas.

2. cab lifting system according to claim 1, which is characterized in that Pneumatic artificial muscle device (2) packet Include the shrinkage type Pneumatic artificial muscle device for pulling the driver's cabin (2) to rotate relative to the vehicle frame.

3. cab lifting system according to claim 1, which is characterized in that Pneumatic artificial muscle device (2) packet It includes:

Elastic tubular part (3) has air inlet；And

Flexible packaging components (4), are wrapped in the periphery of the elastic tubular part (3).

4. cab lifting system according to claim 3, which is characterized in that the elastic tubular part (3) includes rubber Sebific duct.

5. cab lifting system according to claim 3, which is characterized in that it is described flexibility packaging components (4) include:

First cord-like component (4a) spirally extends in the circumferential direction of the elastic tubular part (3) along first direction；And

Second cord-like component (4b), spirally extends in the circumferential direction of the elastic tubular part (3) in a second direction, and described One direction is with the second direction on the contrary, so that first cord-like component (4a) and the second cord-like component (4b) intersect and to be formed Reticular structure.

6. cab lifting system according to claim 1, which is characterized in that further include:

Flow control valve (7) is connected to including the import being connected to the gas source (11) and with the Pneumatic artificial muscle device (2) Outlet；And

Controller (8a, 8b) is connect with the flow control valve (7).

7. cab lifting system according to claim 6, which is characterized in that the controller (8a, 8b) includes pulse Signal output terminal, pulse signal output end are connect with the flow control valve (7).

8. cab lifting system according to claim 6, which is characterized in that further include for detecting the artificial pneumatic The displacement detection part (6) of the displacement of muscle device (2), the displacement detection part (6) and the controller (8a, 8b) are even It connects, the position for the Pneumatic artificial muscle device (2) that the control valve (8a, 8b) detects according to the detection part (6) Control the flow control valve (7).

9. cab lifting system according to claim 6, which is characterized in that further include for detecting gas source (11) output Gas pressure pressure detecting part (12), the controller (8a, 8b) connect with the pressure detecting part (12), with Monitor the pressure of the gas source (11).

10. cab lifting system according to claim 6, which is characterized in that the flow control valve (7) includes ratio Valve.

11. a kind of vehicle, which is characterized in that including cab lifting system described in any one of claims 1 to 10.