CN210416725U - Integrated chassis four-wheel steering device and multifunctional operation vehicle - Google Patents
Integrated chassis four-wheel steering device and multifunctional operation vehicle Download PDFInfo
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- CN210416725U CN210416725U CN201921398334.3U CN201921398334U CN210416725U CN 210416725 U CN210416725 U CN 210416725U CN 201921398334 U CN201921398334 U CN 201921398334U CN 210416725 U CN210416725 U CN 210416725U
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Abstract
The utility model discloses an integral type chassis four-wheel steering device and multi-functional operation car: the steering device comprises a front steering power-assisted cylinder, a rear steering power-assisted cylinder, a first electromagnetic valve, a power-assisted valve, a reversing valve and a second electromagnetic valve, wherein two piston rods of the front steering power-assisted cylinder and the front steering power-assisted cylinder are respectively connected with a steering knuckle of a front wheel system, two piston rods of the rear steering power-assisted cylinder are respectively connected with a steering knuckle of a rear wheel system, and a piston rod of the front steering power-assisted cylinder is also connected with a steering device; an oil port E of the front steering booster cylinder is connected with an oil port A of the reversing valve and an oil port J of the booster valve through a first electromagnetic valve, an oil port F of the front steering booster cylinder is connected with an oil port B of the reversing valve and an oil port K of the booster valve through a second electromagnetic valve, and an oil port P of the booster valve is connected with a hydraulic oil source; and an oil port C and an oil port D of the reversing valve are respectively connected with an oil port G and an oil port H of the rear steering power-assisted cylinder. The utility model discloses can realize three kinds of modes that turn to solenoid valve control.
Description
Technical Field
The utility model relates to a multi-functional operation car technical field, concretely relates to integral type chassis four-wheel steering device and multi-functional operation car.
Background
The front of the multifunctional working vehicle can be provided with various different types of working devices such as a bucket, a pallet fork and a rotary tillage device according to requirements. The steering function of the multifunctional working vehicle determines the passing performance and the maneuverability of the working vehicle to a certain degree, the chassis of the multifunctional working vehicle is divided into an integrated type and a separated type, wherein the steering performance of the separated type chassis is better, but the center of gravity of the multifunctional working vehicle deviates to the inner part of a turning radius in the steering process, the load-carrying performance of the multifunctional working vehicle is influenced, and even the multifunctional working vehicle is turned over.
Therefore, an integrated chassis is generally adopted for a working vehicle with strict requirements on load capacity, and in order to solve the steering problem of the integrated chassis working vehicle, a four-wheel steering mode is generally adopted in the prior art for improving the steering performance of the multifunctional working vehicle, but the wheel steering device in the prior art has a single function, and a mechanical linkage mode is generally adopted, for example, patent number "2015108527050" discloses a linkage type four-wheel steering system which has a certain influence on the passing performance of the chassis, only four wheels can be steered simultaneously during actual use, and actually, the four-wheel steering function does not need to be in an open state all the time.
SUMMERY OF THE UTILITY MODEL
For solving not enough among the prior art, the utility model provides an integral type chassis four-wheel steering device, working method and multi-functional operation car has solved among the prior art multi-functional operation car four-wheel steering mode too single technical problem.
In order to realize the above object, the utility model adopts the following technical scheme:
the utility model provides an integral type chassis four-wheel steering device which characterized in that: the hydraulic steering system comprises a front steering power-assisted cylinder, a rear steering power-assisted cylinder, a first electromagnetic valve, a power-assisted valve, a reversing valve and a second electromagnetic valve, wherein piston cylinders of the front steering power-assisted cylinder and the rear steering power-assisted cylinder have the same inner diameter, piston rods with the same diameter are arranged on two sides of each piston, two piston rods of the front steering power-assisted cylinder are respectively connected with a steering knuckle of a front wheel system, two piston rods of the rear steering power-assisted cylinder are respectively connected with a steering knuckle of a rear wheel system, and a piston rod of the front steering power-assisted cylinder is also connected with a steering device;
an oil port E of the front steering booster cylinder is connected with an oil port A of the reversing valve and an oil port J of the booster valve through a first electromagnetic valve, an oil port F of the front steering booster cylinder is connected with an oil port B of the reversing valve and an oil port K of the booster valve through a second electromagnetic valve, and an oil port P of the booster valve is connected with a hydraulic oil source;
and the oil port C and the oil port D of the reversing valve are respectively connected with the oil port G and the oil port H of the rear steering power-assisted cylinder.
Preferably, the integrated chassis four-wheel steering device is characterized in that: the front steering power-assisted cylinder, the reversing valve and the rear steering power-assisted cylinder are connected through hard pipes.
Preferably, the integrated chassis four-wheel steering device is characterized in that: the rear steering power-assisted cylinder is characterized by further comprising a V-shaped centering fork, a piston rod of the rear steering power-assisted cylinder is further provided with a V-shaped centering ring, and the V-shaped centering fork is further connected with a driving device for driving the V-shaped centering fork to be connected with or disconnected from the V-shaped centering ring.
Preferably, the integrated chassis four-wheel steering device is characterized in that: the driving device is a centering oil cylinder, a rodless cavity of the centering oil cylinder is provided with a spring, and an oil rod cavity of the centering oil cylinder is connected with a hydraulic oil source.
Preferably, the integrated chassis four-wheel steering device is characterized in that: the device also comprises a position sensor for detecting the position of the V-shaped centering ring, when the rear wheel rotates, the V-shaped centering ring triggers the position sensor, and the position sensor is connected with the centering oil cylinder control device.
Preferably, the integrated chassis four-wheel steering device is characterized in that: piston rods of the front steering power-assisted oil cylinder and the rear steering power-assisted oil cylinder are connected with a steering knuckle of the front wheel system and a steering knuckle of the rear wheel system through a middle connecting rod.
Preferably, the integrated chassis four-wheel steering device is characterized in that: the steering device comprises a steering rack connected to a front steering power-assisted cylinder piston rod and steering teeth meshed with the steering rack, and the steering teeth are connected with a steering wheel.
A working method of an integrated chassis four-wheel steering device is characterized in that:
when only the front wheel system steers, the first electromagnetic valve and the second electromagnetic valve are both in a closed state, a J oil port and a K oil port of the power-assisted valve are respectively communicated with an E oil port and an F oil port of the front steering power-assisted cylinder, and the rear wheel system is in a centering state;
when the front wheel system and the rear wheel system are in a steering state and the steering directions of the front wheel system and the rear wheel system are the same, one of the first electromagnetic valve and the second electromagnetic valve, which is connected to an oil return cavity of the front steering power-assisted cylinder, is in a conducting state, the other one of the first electromagnetic valve and the second electromagnetic valve is in an oil return state, an oil port A of the reversing valve is conducted to an oil port C, and an oil port B of the reversing valve is conducted to an oil port D;
when the front wheel system and the rear wheel system are in a steering state and the steering directions of the front wheel system and the rear wheel system are opposite, one of the first electromagnetic valve and the second electromagnetic valve connected to the oil return cavity of the front steering power-assisted cylinder is in a conducting state, the other one of the first electromagnetic valve and the second electromagnetic valve is in an oil return state, and the oil port A of the reversing valve is conducted to the oil port D and the oil port B of the reversing valve is conducted to the oil port C.
A multifunctional operation vehicle is characterized in that: the integrated chassis four-wheel steering device is provided.
The utility model discloses the beneficial effect who reaches: the utility model discloses with the help of two power-assisted steering oil cylinders and hydraulic circuit, the automatically controlled technique of cooperation solenoid valve can realize that the front wheel turns to alone, the front and back wheel turns to in step to a direction, the front and back wheel turns to in step to the opposite direction phase and turns to three kinds of steering modes, promotes the whole performance of controlling, passing through performance and mobility of vehicle, and in practical application, accessible solenoid valve controlling means controls the working logic of each solenoid valve, realizes the above-mentioned switching that turns to the mode.
The utility model discloses the switching of mode that turns to adopts hydraulic circuit's mode to connect, for the mechanical connecting rod technique among the prior art, hydraulic circuit connects the height that can promote the chassis, promotes the trafficability characteristic to hydraulic circuit connects the overall arrangement that more is favorable to whole chassis.
Drawings
FIG. 1 is a first general schematic diagram (front wheel steering only) of the present invention;
FIG. 2 is a second general schematic diagram (the front wheel and the rear wheel are steered the same);
FIG. 3 is a third general schematic diagram (reverse steering of front wheel and rear wheel);
the meaning of the reference numerals: 1-a front wheel system; 2-rear wheel system; 3-front steering power-assisted oil cylinder; 4-rear steering power-assisted oil cylinder; 5-V type middle fork; 6-a first solenoid valve; 7-a booster valve; 8-a reversing valve; 9-a second solenoid valve; 31-a steering rack; 32-a steering tooth; 41-V type centering ring; 42-position sensor; 51-centering oil cylinder; 10-intermediate link.
Detailed Description
The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1: the embodiment discloses an integral type chassis four-wheel steering device: the hydraulic steering system comprises a front steering power-assisted cylinder 3, a rear steering power-assisted cylinder 4, a first electromagnetic valve 6, a power-assisted valve 7, a reversing valve 8 and a second electromagnetic valve 9, wherein piston rods with the same diameter are arranged on two sides of pistons of the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder 4, two piston rods of the front steering power-assisted cylinder 3 are respectively connected with a steering knuckle of a front wheel system 1, two piston rods of the rear steering power-assisted cylinder 4 are respectively connected with a steering knuckle of a rear wheel system 2, and a piston rod of the front steering power-assisted cylinder 3 is also connected with a steering.
An oil port E of the front steering power-assisted cylinder 3 is connected with an oil port A of the reversing valve 8 and an oil port J of the power-assisted valve 7 through a first electromagnetic valve 6, an oil port F of the front steering power-assisted cylinder 3 is connected with an oil port B of the reversing valve 8 and an oil port K of the power-assisted valve 7 through a second electromagnetic valve 9, and an oil port P of the power-assisted valve 7 is connected with a hydraulic oil source;
the oil port C and the oil port D of the reversing valve 8 are respectively connected with the oil port G and the oil port H of the rear steering power-assisted cylinder 4.
In the embodiment, the front steering power-assisted cylinder 3, the reversing valve 8 and the rear steering power-assisted cylinder 4 are preferably connected through hard pipes, namely, through metal hydraulic pipes, so that the overall expansion ratio of a hydraulic circuit can be reduced, and the purpose of accurate steering is achieved.
The rear steering power-assisted cylinder 4 is provided with a V-shaped centering ring 41, and the V-shaped centering fork 5 is further connected with a driving device for driving the V-shaped centering fork 5 to be connected with or disconnected from the V-shaped centering ring 41. Specifically, the drive device of the embodiment preferably includes a centering cylinder 51, a rodless cavity of the centering cylinder 51 is provided with a spring, the V-shaped centering fork 5 can clamp the V-shaped centering ring 41 under the pressure of the spring under the condition of no hydraulic pressure, and when the rear wheel steering is required, a hydraulic oil source is connected to an oil rod cavity of the centering cylinder 51 to compress the spring, so that the V-shaped centering fork 5 is separated from the V-shaped centering ring 41.
In order to ensure the accurate combination of the V-shaped centering fork 5 and the V-shaped centering ring 41, the present embodiment further includes a position sensor 42 for detecting the position of the V-shaped centering ring 41, when the rear wheel is turned, the V-shaped centering ring 41 triggers the position sensor 42, and the position sensor 42 is connected with the control device of the centering cylinder 51, so as to ensure that the V-shaped centering ring 41 can be clamped when the V-shaped centering fork 5 is extended.
Specifically, piston rods of the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder 4 are connected with a steering knuckle of the front wheel system 1 and a steering knuckle of the rear wheel system 2 through a middle connecting rod 10. The existence of the middle connecting rod 10 enables the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder 4 to be fixed on the chassis, so that when the steering knuckle rotates, the power-assisted cylinders need to adjust the distance between the power-assisted cylinders and the front wheel system and the distance between the power-assisted cylinders and the rear wheel system 2, and the strength and the stability of the power-assisted cylinders are improved.
Specifically, the steering apparatus of the present embodiment includes a steering rack 31 connected to a piston rod of the front steering cylinder 3, and steering teeth 32 engaged with the steering rack 31, and the steering teeth 32 are connected to a steering wheel.
The embodiment further specifically discloses a working method of the integrated chassis four-wheel steering device, which is described in the following with reference to the accompanying drawings:
as shown in fig. 1: when only the front wheel system 1 is required to steer, the first electromagnetic valve 6 and the second electromagnetic valve 9 are both in a closed state, the J oil port and the K oil port of the booster valve 7 are respectively communicated with the E oil port and the F oil port of the front steering booster cylinder 3, the rear wheel system 2 is in a centering state, namely the V-shaped centering fork 5 is combined with the V-shaped centering ring 41, so that the rear wheel is ensured to be in a centering state, and the centering state of the rear wheel is mechanically clamped, so that the rear wheel system is reliable. The entire chassis is now equivalent to a front wheel steering. The electric control end of the power-assisted valve 7 is connected with a steering detection device (belonging to the prior art).
When the steering rack 31 is driven to reciprocate by the steering gear 32, the power-assisted valve 7 adjusts the conduction states of the oil port P, the oil port J and the oil port K according to the steering of the steering wheel, so as to realize steering power assistance, for example, when the steering wheel turns left, the front steering power-assisted cylinder 3 moves leftwards, P is conducted to the oil port K, and F is conducted to the oil port T for oil return.
In some application places, the whole vehicle needs to move in one direction, the front wheel system 1 and the rear wheel system 2 are both in a steering state, and the steering directions of the front wheel system 1 and the rear wheel system 2 are the same, one (electromagnetic valve) of the first electromagnetic valve 6 and the second electromagnetic valve 9, which is connected to the oil return cavity of the front steering power-assisted cylinder 3, is in a conducting state, the other (electromagnetic valve) is in an oil return state, the oil port A of the reversing valve 8 is conducted to the oil port D, and the oil port B is conducted to the oil port C.
Specifically, as shown in fig. 2: when the front wheel system 1 and the rear wheel system 2 are both in the same steering state, assuming that the steering direction is the direction of an arrow in fig. 2, the oil port a of the reversing valve 8 is communicated with the oil port C and the oil port B is communicated with the oil port D; in this state, the piston rods of the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder 4 have opposite movement directions, when the piston rod of the front steering power-assisted cylinder 3 moves leftwards, the hydraulic oil source P sequentially enters the oil port F and the oil port G (through a BC flow channel of the reversing valve 8) through the oil port K, at this time, the oil liquid of the port E sequentially enters the oil port G of the rear steering power-assisted cylinder 4 through the first electromagnetic valve 6 and the reversing valve 8, the oil liquid of the oil port H of the rear steering power-assisted cylinder 4 enters the oil return port T of the second electromagnetic valve 9 through the reversing valve 8, so as to realize oil return, in the above process, the oil liquid amount flowing out from the oil port E (connected to an oil return cavity of the front steering power-assisted cylinder 3) is equal to the inflow amount of the oil port G, because the inner diameters of the piston cylinders of the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder, the moving distances of the two power steering cylinders are equal, that is, the same steering angle of the front wheel system 1 and the rear wheel system 2 can be ensured.
When the whole vehicle needs to turn greatly within a short distance, the front wheel and the rear wheel need to rotate towards two opposite directions simultaneously, the working principle of the steering mechanism is similar to that of the steering mechanism of the front wheel system 1 and the steering mechanism of the rear wheel system 2 towards the same turning direction, and the difference is the conduction condition of the reversing valve 8.
As shown in fig. 3, when both the front wheel system 1 and the rear wheel system 2 are in a steering state and the steering directions of the front wheel system 1 and the rear wheel system 2 are opposite to each other. Taking the direction of the arrows in fig. 3 as an example, the moving directions of the front steering power-assisted cylinder 3 and the rear steering power-assisted cylinder 4 are both leftward, at this time, the oil port a of the reversing valve 8 is connected to the oil port D and the oil port B is connected to the oil port C, the oil port E is connected to the oil port H through the reversing valve 8, and similarly, the oil in the oil port G of the rear steering power-assisted cylinder 4 enters the oil return port T of the second electromagnetic valve 9 through the reversing valve 8, so that oil return is realized.
In the four-wheel steering process, the steering performance of the whole vehicle cannot be influenced even if the steering amplitudes of the front wheel system 1 and the rear wheel system 2 are slightly different due to the hydraulic circuit.
The utility model discloses with the help of two power-assisted steering oil cylinders and hydraulic circuit, the automatically controlled technique of cooperation solenoid valve can realize that the front wheel turns to alone, the front and back wheel turns to in step to a direction, the front and back wheel turns to in step to the opposite direction phase in turn to, promotes the whole performance of controlling, passing through performance and mobility of vehicle, and in practical application, accessible solenoid valve controlling means controls the working logic of each solenoid valve, realizes the above-mentioned switching that turns to the mode.
The utility model discloses the switching of mode that turns to adopts hydraulic circuit's mode to connect, for the mechanical connecting rod technique among the prior art, hydraulic circuit connects the height that can promote the chassis, promotes the trafficability characteristic to hydraulic circuit connects the overall arrangement that more is favorable to whole chassis.
The embodiment also discloses a multifunctional working vehicle which is provided with the integrated chassis four-wheel steering device.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.
Claims (8)
1. The utility model provides an integral type chassis four-wheel steering device which characterized in that: the steering device comprises a front steering power-assisted cylinder (3), a rear steering power-assisted cylinder (4), a first electromagnetic valve (6), a power-assisted valve (7), a reversing valve (8) and a second electromagnetic valve (9), wherein piston cylinders of the front steering power-assisted cylinder (3) and the rear steering power-assisted cylinder (4) are the same in inner diameter, piston rods with the same diameter are arranged on two sides of each piston, two piston rods of the front steering power-assisted cylinder (3) are respectively connected with a steering knuckle of a front wheel system (1), two piston rods of the rear steering power-assisted cylinder (4) are respectively connected with a steering knuckle of a rear wheel system (2), and a piston rod of the front steering power-assisted cylinder (3) is also connected with a steering device;
an oil port E of the front steering power-assisted cylinder (3) is connected with an oil port A of the reversing valve (8) and an oil port J of the power-assisted valve (7) through a first electromagnetic valve (6), an oil port F of the front steering power-assisted cylinder (3) is connected with an oil port B of the reversing valve (8) and an oil port K of the power-assisted valve (7) through a second electromagnetic valve (9), and an oil port P of the power-assisted valve (7) is connected with a hydraulic oil source;
and the oil port C and the oil port D of the reversing valve (8) are respectively connected with the oil port G and the oil port H of the rear steering power-assisted cylinder (4).
2. The integrated chassis four-wheel steering apparatus according to claim 1, wherein: the front steering power-assisted cylinder (3), the reversing valve (8) and the rear steering power-assisted cylinder (4) are connected through hard pipes.
3. The integrated chassis four-wheel steering apparatus according to claim 1, wherein: the rear steering power-assisted cylinder is characterized by further comprising a V-shaped centering fork (5), a piston rod of the rear steering power-assisted cylinder (4) is further provided with a V-shaped centering ring (41), and the V-shaped centering fork (5) is further connected with a driving device for driving the V-shaped centering fork (5) to be connected with or disconnected from the V-shaped centering ring (41).
4. An integrated chassis four-wheel steering apparatus according to claim 3, wherein: the driving device is a centering oil cylinder (51), a rodless cavity of the centering oil cylinder (51) is provided with a spring, and an oil rod cavity of the centering oil cylinder (51) is connected with a hydraulic oil source.
5. An integrated chassis four-wheel steering apparatus according to claim 3 or 4, wherein: the device also comprises a position sensor (42) for detecting the position of the V-shaped centering ring (41), when the rear wheel is turned, the V-shaped centering ring (41) triggers the position sensor (42), and the position sensor (42) is connected with a centering oil cylinder (51) control device.
6. The integrated chassis four-wheel steering apparatus according to claim 1, wherein: piston rods of the front steering power-assisted cylinder (3) and the rear steering power-assisted cylinder (4) are connected with a steering knuckle of the front wheel system (1) and a steering knuckle of the rear wheel system (2) through a middle connecting rod (10).
7. The integrated chassis four-wheel steering apparatus according to claim 1, wherein: the steering device comprises a steering rack (31) connected to a piston rod of the front steering power-assisted cylinder (3) and steering teeth (32) meshed with the steering rack (31), wherein the steering teeth (32) are connected with a steering wheel.
8. A multifunctional operation vehicle is characterized in that: an integrated chassis four-wheel steering apparatus as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398334.3U CN210416725U (en) | 2019-08-27 | 2019-08-27 | Integrated chassis four-wheel steering device and multifunctional operation vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921398334.3U CN210416725U (en) | 2019-08-27 | 2019-08-27 | Integrated chassis four-wheel steering device and multifunctional operation vehicle |
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| Publication Number | Publication Date |
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| CN210416725U true CN210416725U (en) | 2020-04-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921398334.3U Active CN210416725U (en) | 2019-08-27 | 2019-08-27 | Integrated chassis four-wheel steering device and multifunctional operation vehicle |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371186A (en) * | 2019-08-27 | 2019-10-25 | 廊坊中博工程机械设备制造有限公司 | A kind of integral type chassis four-wheel steering assembly, working method and multifunction operation vehicle elevation |
-
2019
- 2019-08-27 CN CN201921398334.3U patent/CN210416725U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110371186A (en) * | 2019-08-27 | 2019-10-25 | 廊坊中博工程机械设备制造有限公司 | A kind of integral type chassis four-wheel steering assembly, working method and multifunction operation vehicle elevation |
| CN110371186B (en) * | 2019-08-27 | 2024-03-08 | 廊坊中博工程机械设备制造有限公司 | Integrated chassis four-wheel steering device, working method and multifunctional working vehicle |
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