Hydraulic steering device capable of achieving steering switching and parallel fine adjustment

Abstract

The utility model relates to the technical field of hydraulic steering, and discloses a hydraulic steering device capable of steering switching and parallel fine adjustment, which comprises an oil cylinder I, an oil pipe, a reversing valve I, a steering gear, an electromagnetic reversing valve, a hydraulic lock, a reversing valve II, an oil cylinder II, an oil cylinder III, an oil cylinder IV, a front tire, a frame main body and a rear tire, the first oil cylinder is connected with the first reversing valve and the second oil cylinder through the oil pipes, the first reversing valve is connected with the steering gear through the oil pipes, the electromagnetic reversing valve is connected with the steering gear and the second oil cylinder through the oil pipes, and the third oil cylinder is connected with the fourth oil cylinder and the second reversing valve through the oil pipes. According to the four-wheel steering system, when the electromagnetic reversing valve Y1 is powered on, an oil way is connected with the third oil cylinder through the second reversing valve and connected with the fourth oil cylinder through the oil pipe through the electromagnetic reversing valve, so that four-wheel steering is achieved, and when the electromagnetic reversing valve Y2 is powered on, the oil ways passing through the electromagnetic reversing valve are exchanged, so that oblique steering is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic steering technical field especially relates to a kind of hydraulic steering device that can be switched steering can be parallel fine tuning. BACKGROUND

[0002] With the development of agricultural equipment, the types of agricultural machinery are more and more complex, and the technical level is also higher and higher. From the current mainstream two-wheel steering, it becomes four-wheel steering and crab steering, and then derives a steering mode that has two-wheel, four-wheel and crab steering, three steering modes in one. However, this steering mode often causes the front and rear wheels not to be on the same line or the left and right wheels not to be parallel. In particular, when a variable wheelbase agricultural machine appears, the left and right steering may need to be operated by two oil cylinders. Since the solenoid valve group or the oil cylinder may have a loose seal, the left and right wheels may appear as an external eight or an internal eight, thereby affecting normal operation.

[0003] Currently, the patents on the market basically maintain separate two-wheel steering or separate four-wheel steering. When having two-wheel, four-wheel and crab steering at the same time, the left and right wheels often appear not to be parallel during use, thereby causing the operation to be terminated and frequent maintenance.

[0004] If a piece of agricultural machinery can have two-wheel, four-wheel and crab steering switching, and can ensure that the left and right tires appear as an external eight or an internal eight to automatically fine-tune, it can ensure that the machine avoids unnecessary accidents during operation, improves operation efficiency, and reduces the burden on enterprises. INVENTION CONTENTS

[0005] The hydraulic steering device that can be switched steering can be parallel fine tuning provided by the utility model aims to improve the problem of low operation efficiency of some devices in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A hydraulic steering device that can be switched steering can be parallel fine tuning, comprising a cylinder one, a pipe, a reversing valve one, a steering gear, an electromagnetic reversing valve, a hydraulic lock, a reversing valve two, a cylinder two, a cylinder three, a cylinder four, a front tire, a frame main body, a rear tire, the cylinder one is connected with the reversing valve one and the cylinder two through the pipe, the reversing valve one is connected with the steering gear through the pipe, the electromagnetic reversing valve is connected with the steering gear and the cylinder two through the pipe, the cylinder three is connected with the cylinder four and the reversing valve two through the pipe, and the electromagnetic reversing valve is connected with the hydraulic lock through the pipe.

[0008] As a further description of the above technical scheme:

[0009] The electromagnetic reversing valve is connected with the hydraulic lock between the reversing valve two and the oil cylinder four.

[0010] As a further description of the above technical solution:

[0011] The oil cylinder one and the oil cylinder two are connected by the oil pipe and connected with the reversing valve one, and the oil cylinder three and the oil cylinder four are connected by the oil pipe and connected with the reversing valve two.

[0012] As a further description of the above technical solution:

[0013] The reversing valve one is internally provided with an A port, and the reversing valve one is internally provided with a B port.

[0014] As a further description of the above technical solution:

[0015] The reversing valve two is internally provided with an A port, and the reversing valve two is internally provided with a B port.

[0016] As a further description of the above technical solution:

[0017] The electromagnetic reversing valve can be connected with the internally provided Y1 and Y2 two passages.

[0018] The utility model has the following beneficial effects:

[0019] 1、 the utility model discloses a hydraulic steering device, including reversing valve one, reversing valve two, oil cylinder one, oil cylinder two, oil cylinder three, oil cylinder four, electromagnetic reversing valve, oil pipe, steering gear, reversing valve one and reversing valve two are connected by oil pipe, oil cylinder one and oil cylinder two are connected by oil pipe, oil cylinder three and oil cylinder four are connected by oil pipe, oil cylinder one and oil cylinder two are connected with the steering gear, and the oil cylinder three and the oil cylinder four are connected with the steering gear.

[0020] 2、 the utility model discloses a hydraulic steering device, including reversing valve one, reversing valve two, oil cylinder one, oil cylinder two, oil cylinder three, oil cylinder four, electromagnetic reversing valve, oil pipe, steering gear, reversing valve one and reversing valve two are connected by oil pipe, oil cylinder one and oil cylinder two are connected by oil pipe, oil cylinder three and oil cylinder four are connected by oil pipe, oil cylinder one and oil cylinder two are connected with the steering gear, and the oil cylinder three and the oil cylinder four are connected with the steering gear. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 It is a kind of hydraulic steering device principle diagram of parallel fine adjustment of the utility model discloses a switchable steering.

[0022] Fig. 2 Figure 1 is a schematic diagram of a two-wheel, four-wheel and diagonal steering of a hydraulic steering device capable of steering switching and parallel fine tuning according to the present application;

[0023] Fig. 3 Figure 2 is a schematic diagram of parallel fine tuning of a hydraulic steering device capable of steering switching and parallel fine tuning according to the present application.

[0024] Legend:

[0025] 1 oil cylinder one; 2 oil pipe; 3 reversing valve one; 4 steering gear; 5 electromagnetic reversing valve; 6 hydraulic lock; 7 reversing valve two; 8 oil cylinder two; 9 oil cylinder three; 10 oil cylinder four. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] With reference to Figs. 1 to 3 , the present application provides an embodiment: a hydraulic steering device capable of steering switching and parallel fine tuning, comprising an oil cylinder one 1, an oil pipe 2, a reversing valve one 3, a steering gear 4, an electromagnetic reversing valve 5, a hydraulic lock 6, a reversing valve two 7, an oil cylinder two 8, an oil cylinder three 9, an oil cylinder four 10, a front tire, a frame main body, a rear tire, the oil cylinder one 1 is connected with the reversing valve one 3 and the oil cylinder two 8 through the oil pipe 2, the reversing valve one 3 is connected with the steering gear 4 through the oil pipe 2, the electromagnetic reversing valve 5 is connected with the steering gear 4 and the oil cylinder two 8 through the oil pipe 2, the oil cylinder three 9 is connected with the oil cylinder four 10 and the reversing valve two 7 through the oil pipe 2, and the electromagnetic reversing valve 5 is connected with the hydraulic lock 6 through the oil pipe 2;

[0028] The electromagnetic reversing valve 5 and the reversing valve two 7 and the oil cylinder four 10 are connected with the hydraulic lock 6 in the middle, the oil cylinder one 1 and the oil cylinder two 8 are connected with the oil pipe 2 in the middle and connected with the reversing valve one 3, the oil cylinder three 9 and the oil cylinder four 10 are connected with the oil pipe 2 in the middle and connected with the reversing valve two 7.

[0029] Working principle: through the steering gear 4 rotation, hydraulic oil through the reversing valve one 3 A to reach the oil cylinder one 1, oil cylinder one 1 and oil cylinder two 8 through the oil pipe 2 connection, oil cylinder two 8 the other side through electromagnetic reversing valve 5 and steering gear 4 connection, thereby realizing two wheel steering, when electromagnetic reversing valve 5 Y1 power, through electromagnetic reversing valve 5 will oil circuit 2 through reversing valve two 7 and oil cylinder three 9 connection, again through the oil pipe 2 and oil cylinder four 10 connection, thereby realizing four wheel steering. When electromagnetic reversing valve 5 Y2 power, will through the oil circuit of electromagnetic reversing valve 5 interchange, thereby realizing crab steering, through the operation of reversing valve one 3, make oil circuit through the B port of reversing valve one 3, through the action of steering gear 4, can in time to oil cylinder one 1 and oil cylinder two 8 internal oil circuit connected by oil or venting, thereby ensuring the parallel of left and right wheels. When oil cylinder three 9 and oil cylinder four 10 appear pressure relief or oil leakage resulting in two wheel not parallel, through the operation of reversing valve two 7, make oil circuit through the B port of reversing valve two 7, through the action of steering gear 4, can in time to oil cylinder three 9 and oil cylinder four 10 internal oil circuit connected by oil or venting, thereby ensuring the parallel of left and right wheels.

[0030] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application has been made with reference to the foregoing embodiments, for the skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A hydraulic steering device with steerable switching and parallel fine-tuning, comprising a first cylinder (1), an oil pipe (2), a first directional valve (3), a steering gear (4), a solenoid directional valve (5), a hydraulic lock (6), a second directional valve (7), a second cylinder (8), a third cylinder (9), a fourth cylinder (10), a front tire, a frame body, and a rear tire, characterized in that: The first hydraulic cylinder (1) is connected to the first reversing valve (3) and the second hydraulic cylinder (8) through the oil pipe (2). The first reversing valve (3) is connected to the steering gear (4) through the oil pipe (2). The electromagnetic reversing valve (5) is connected to the steering gear (4) and the second hydraulic cylinder (8) through the oil pipe (2).

2. The hydraulic steering device with steering switching and parallel fine adjustment according to claim 1, characterized in that: The third oil cylinder (9) is connected to the fourth oil cylinder (10) and the second directional valve (7) through the oil pipe (2).

3. The hydraulic steering device with steering switching and parallel fine adjustment according to claim 1, characterized in that: The electromagnetic reversing valve (5) and the hydraulic lock (6) are connected through the oil pipe (2).

4. A hydraulic steering device with steering switching and parallel fine-tuning according to claim 1, characterized in that: A hydraulic lock (6) exists between the electromagnetic reversing valve (5), the reversing valve two (7), and the oil cylinder four (10).

5. A hydraulic steering device with steerable switching and parallel fine-tuning according to claim 1, characterized in that: The first oil cylinder (1) and the second oil cylinder (8) are connected by the oil pipe (2) and connected to the first reversing valve (3). The third oil cylinder (9) and the fourth oil cylinder (10) are connected by the oil pipe (2) and connected to the second reversing valve (7).

6. A hydraulic steering device with steering switching and parallel fine adjustment according to claim 1, characterized in that: The reversing valve 1 (3) has an A port inside and a B port inside.

7. A hydraulic steering device with steering switching and parallel fine-tuning according to claim 1, characterized in that: The reversing valve 2 (7) has an A port inside and a B port inside.

8. A hydraulic steering device with steering switching and parallel fine adjustment according to claim 1, characterized in that: The electromagnetic reversing valve (5) can be connected to the two internally opened passages Y1 and Y2.

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