Full-hydraulic steering gear with emergency steering function

Abstract

The utility model discloses a full-hydraulic steering gear with an emergency steering function, which comprises a valve body, a valve core and valve sleeve pair is arranged in the valve body, a main linkage shaft is arranged in the center of the valve core and valve sleeve pair, and a first partition disc, a second partition disc, a third partition disc and a rear cover are arranged on the side portion of the valve body. The first separation disc, the second separation disc and the third separation disc are coaxially arranged, a first stator and rotor assembly is arranged between the first separation disc and the second separation disc, a flow switching device is arranged between the second separation disc and the third separation disc, a small linkage shaft is arranged in the center of the flow switching device, and a second stator and rotor assembly is arranged between the third separation disc and the rear cover. The flow switching device comprises an annular outer disc, a flow switching valve element is arranged in the center of the outer disc, a spring and a baffle are arranged in the flow switching valve element, and the spring abuts against the baffle. According to the full-hydraulic steering gear with the emergency steering function, under the condition that the pump does not supply oil, power-assisted steering can still be achieved, safety is good, and reliability is high.

Description

Technical Field

[0001] The utility model relates to a full hydraulic steering gear, more specifically, to a full hydraulic steering gear with an emergency steering function. Background Art

[0002] Fully hydraulic steering gears are usually used in forklifts, tractors, agricultural machinery, construction machinery and other fields. Without a pump to supply oil, the steering wheel is very heavy, especially for large-displacement steering gears, which are almost difficult to steer. Once the steering system parts are damaged during road driving, resulting in the inability to steer, serious consequences will occur. Utility Model Content

[0003] Based on this, it is necessary to provide a full hydraulic steering gear with emergency steering function to address the above technical problems.

[0004] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A fully hydraulic steering gear with an emergency steering function, characterized in that the fully hydraulic steering gear with an emergency steering function comprises a valve body, a valve core valve sleeve pair is provided inside the valve body, a main linkage shaft is provided in the center of the valve core valve sleeve pair, a first partition plate, a second partition plate, a third partition plate and a back cover are provided on the side of the valve body, the first partition plate, the second partition plate and the third partition plate are coaxially arranged, a first stator-rotor assembly is provided between the first partition plate and the second partition plate, a flow switching device is provided between the second partition plate and the third partition plate, a small linkage shaft is provided in the center of the flow switching device, and a second stator-rotor assembly is provided between the third partition plate and the back cover.

[0006] As a preferred embodiment of the utility model, the first partition plate, the second partition plate, the third partition plate and the back cover are all circular.

[0007] As a preferred embodiment of the utility model, the rear cover is connected to the second stator and rotor assembly through a plurality of bolts.

[0008] As a preferred embodiment of the utility model, the flow switching device comprises an annular outer disk, a flow switching valve core is provided at the center of the outer disk, a spring and a baffle are provided inside the flow switching valve core, and the spring presses against the baffle.

[0009] Compared with the prior art, the utility model has the following beneficial effects:

[0010] The utility model provides a full hydraulic steering gear with an emergency steering function. The full hydraulic steering gear with the emergency steering function can still realize steering assistance under the condition that the pump does not supply oil, has good safety and high reliability, is particularly suitable for large-displacement steering gear application occasions, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the scheme in the utility model, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a structural schematic diagram of a full hydraulic steering gear with emergency steering function of the utility model;

[0013] Figure 2 for Figure 1 The schematic diagram of the full hydraulic steering gear with emergency steering function is in the oil supply state at this time;

[0014] Figure 3 for Figure 1 The schematic diagram of the full hydraulic steering gear with emergency steering function is shown in the figure. At this time, it is in the state of no oil supply;

[0015] The markings in the figure are as follows: 1. Valve body; 10. Bolt; 2. Valve core and valve sleeve pair; 3. Main linkage shaft; 4. First partition plate; 42. Second partition plate; 43. Third partition plate; 5. First stator and rotor assembly; 6. Flow switching device; 61. Outer plate; 62. Flow switching valve core; 63. Spring; 64. Baffle; 7. Small linkage shaft; 8. Second stator and rotor assembly; 9. Back cover. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solution in the embodiment of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the present utility model.

[0017] like Figure 1As shown, the full hydraulic steering gear with emergency steering function includes a valve body 1, a valve core valve sleeve pair 2 is provided inside the valve body 1, a main linkage shaft 3 is provided in the center of the valve core valve sleeve pair 2, a circular first baffle 4, a circular second baffle 42, a circular third baffle 43 and a circular back cover 9 are provided on the side of the valve body 1, the first baffle 4, the second baffle 42 and the third baffle 43 are coaxially arranged, a first stator-rotor assembly 5 is provided between the first baffle 4 and the second baffle 42, a flow switching device 6 is provided between the second baffle 42 and the third baffle 43, a small linkage shaft 7 is provided in the center of the flow switching device 6, and a second stator-rotor assembly 8 is provided between the third baffle 43 and the back cover 9.

[0018] It should be noted that the rear cover 9 is connected to the second stator-rotor assembly 8 via a plurality of bolts 10 .

[0019] like Figure 2 As shown, the flow switching device 6 includes an annular outer disk 61 , a flow switching valve core 62 is provided at the center of the outer disk 61 , a spring 63 and a baffle 64 are provided inside the flow switching valve core 62 , and the spring 63 presses against the baffle 64 .

[0020] The working mode of the full hydraulic steering gear with emergency steering function is explained below.

[0021] like Figure 2 As shown, when the pump supplies oil, when the oil inlet pressure is greater than 0.5MPa, the oil pushes the flow switching valve core 62 forward, and the groove on the flow switching valve core 62 connects the upper and lower holes of the outer plate 61, and the oil supply path is shown as the mark S. The first stator-rotor assembly 5 and the second stator-rotor assembly 8 are connected in series, so that the two stators and rotors work at the same time, so the displacement of the steering gear is the sum of the displacements of the two stators and rotors.

[0022] like Figure 3 As shown, when the pump does not supply oil, the spring 63 rebounds, so that the flow switching valve core 62 is pushed back, and the upper and lower holes of the outer disk 61 are not connected to each other. At this time, the second stator-rotor assembly 8 does not work, and the displacement of the steering gear is the displacement of the first stator-rotor assembly 5.

[0023] Usually, the displacement of the first stator-rotor assembly 5 is only 1 / 7 to 1 / 2 of the sum of the displacements of the dual stator-rotors. Under the same conditions, the smaller the displacement, the smaller the mechanical resistance torque.

[0024] The full hydraulic steering gear with emergency steering function can still achieve steering assistance when the pump does not supply oil, has good safety and high reliability, is particularly suitable for large-displacement steering gear applications, and has strong practicality.

[0025] Obviously, the embodiments described above are only part of the embodiments of the present application, rather than all the embodiments. The drawings provide preferred embodiments of the present application, but do not limit the patent scope of the present application.

Claims

1. A fully hydraulic steering gear with emergency steering function, characterized in that: The fully hydraulic steering gear with emergency steering function comprises a valve body (1), a valve core valve sleeve pair (2) is arranged inside the valve body (1), a main linkage shaft (3) is arranged at the center of the valve core valve sleeve pair (2), a first baffle (4), a second baffle (42), a third baffle (43) and a rear cover (9) are arranged on the side of the valve body (1), the first baffle (4), the second baffle (42) and the third baffle (43) are coaxially arranged, a first stator-rotor assembly (5) is arranged between the first baffle (4) and the second baffle (42), a flow switching device (6) is arranged between the second baffle (42) and the third baffle (43), a small linkage shaft (7) is arranged at the center of the flow switching device (6), and a second stator-rotor assembly (8) is arranged between the third baffle (43) and the rear cover (9).

2. The fully hydraulic steering gear with emergency steering function according to claim 1, characterized in that: The first partition plate (4), the second partition plate (42), the third partition plate (43) and the rear cover (9) are all circular.

3. The fully hydraulic steering gear with emergency steering function according to claim 1, characterized in that: The rear cover (9) is connected to the second stator and rotor assembly (8) via a plurality of bolts (10).

4. The fully hydraulic steering gear with emergency steering function according to claim 1, characterized in that: The flow switching device (6) comprises an annular outer disk (61), a flow switching valve core (62) is provided at the center of the outer disk (61), a spring (63) and a baffle (64) are provided inside the flow switching valve core (62), and the spring (63) is pressed against the baffle (64).

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