A dual-circuit large-flow integral recirculating ball steering gear

Abstract

The utility model discloses a dual-circuit large-flow integral circulating ball steering gear, comprising a housing, an input shaft and a screw shaft arranged in the housing, the input shaft comprising a rod-shaped input main shaft, a hollow auxiliary steering valve and a hollow main steering valve arranged on the input main shaft, the screw shaft comprising a screw body, a hollow tubular screw barrel arranged on one side of the screw body, a plurality of upper chamber oil ports, a plurality of lower chamber oil ports, a plurality of main valve oil inlets, a plurality of main valve oil outlets, a plurality of clockwise high-pressure boosting oil ports, a plurality of auxiliary valve oil outlets and a plurality of counterclockwise high-pressure boosting oil ports arranged on the outer wall of the screw barrel. The dual-circuit large-flow integral circulating ball steering gear can be connected to two groups of inlet and return oil pump systems to meet the needs of large-volume flow of large lifting vehicles. In addition to providing normal power assistance, the steering gear can be connected to two groups of oil cylinders at the same time to control the direction of hydraulic oil, meeting the design requirements of multiple steering boosting cylinders for lifting vehicles.

Description

Technical Field

[0001] The utility model relates to a steering gear, more specifically, to a dual-circuit large-flow integral circulating ball steering gear. Background Art

[0002] The recommended flow range for conventional recirculating ball steering gears is below 25L / min, which cannot meet the needs of ultra-large flow rates. In addition, it cannot meet the needs of steering systems that require multi-axis steering and multi-oil pump safety backup for some special vehicle models. Utility Model Content

[0003] Based on this, it is necessary to provide a dual-circuit large-flow integral recirculating ball steering gear 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 dual-circuit large-flow integral recirculating ball steering gear, characterized in that the dual-circuit large-flow integral recirculating ball steering gear comprises a housing, an input shaft and a screw shaft are arranged in the housing, and the screw shaft is sleeved on the outside of the input shaft.

[0006] The input shaft comprises a rod-shaped input main shaft, on which a hollow auxiliary steering valve and a hollow main steering valve are arranged.

[0007] The screw shaft comprises a screw body, one side of the screw body is provided with a hollow tubular screw barrel, the outer wall of the screw barrel is provided with a plurality of upper chamber oil ports, a plurality of lower chamber oil ports, a plurality of main valve oil inlets, a plurality of main valve oil outlets, a plurality of clockwise high-pressure boosting oil ports, a plurality of auxiliary valve oil outlets and a plurality of counterclockwise high-pressure boosting oil ports,

[0008] The distances from the upper cavity oil port, the lower cavity oil port, the main valve oil inlet, the main valve oil outlet, the clockwise high-pressure boosting oil port, the auxiliary valve oil outlet and the counterclockwise high-pressure boosting oil port to the screw body gradually increase.

[0009] As a preferred embodiment of the utility model, the auxiliary steering valve is provided with an auxiliary steering oil port, and the main steering valve is provided with a main steering oil port.

[0010] As a preferred embodiment of the utility model, the upper chamber oil port, the lower chamber oil port, the main valve oil inlet, the main valve oil outlet, the clockwise high-pressure boosting oil port, the auxiliary valve oil outlet and the counterclockwise high-pressure boosting oil port are all circumferentially arranged on the outer wall of the screw barrel.

[0011] As a preferred embodiment of the utility model, the diameters of the upper chamber oil port, the lower chamber oil port, the main valve oil inlet, the main valve oil outlet, the clockwise high-pressure boosting oil port, the auxiliary valve oil outlet and the counterclockwise high-pressure boosting oil port are all 6 mm.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The utility model provides a dual-circuit large-flow integral circulating ball steering gear, which can be connected to two sets of oil inlet and return oil pump systems to meet the needs of large-scale lifting vehicles with large flows. In addition to providing normal power assistance, the steering gear can be connected to two sets of oil cylinders at the same time to control the direction of hydraulic oil, meeting the design requirements of multiple steering power cylinders for lifting vehicles. Different power oil ports are controlled by main and auxiliary rotary valves respectively, which improves the reliability of product use. In addition, the steering gear is similar to the conventional steering gear in structure, does not need to change the installation size, and has a compact installation size. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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.

[0015] Figure 1 It is a three-dimensional structural schematic diagram of a dual-circuit large-flow integral recirculating ball steering gear of the utility model;

[0016] Figure 2 for Figure 1 The sectional view of the dual-circuit large-flow integral recirculating ball steering gear along the AA line;

[0017] Figure 3 for Figure 2 A schematic diagram of the three-dimensional structure of the input shaft of the recirculating ball steering gear;

[0018] Figure 4 for Figure 2 A schematic diagram of the three-dimensional structure of the screw shaft 3 of the recirculating ball steering gear;

[0019] The markings in the figure are as follows: 1. Dual-circuit large-flow integral circulating ball steering gear; 2. Housing; 3. Screw shaft; 31. Screw body; 32. Screw barrel; 321. Upper chamber oil port; 322. Lower chamber oil port; 323. Main valve oil inlet; 324. Main valve oil outlet; 325. Clockwise high-pressure power-assisting oil port; 326. Auxiliary valve oil outlet; 327. Counterclockwise high-pressure power-assisting oil port; 4. Input shaft; 41. Input main shaft; 42. Auxiliary steering valve; 43. Main steering valve. DETAILED DESCRIPTION

[0020] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0021] The dual-circuit large-flow integral recirculating ball steering gear 1 comprises a housing 2 , in which an input shaft 4 and a screw shaft 3 are arranged. The screw shaft 3 is sleeved on the outside of the input shaft 4 .

[0022] The input shaft 4 includes a rod-shaped input main shaft 41 , on which a hollow auxiliary steering valve 42 and a hollow main steering valve 43 are disposed. The auxiliary steering valve 42 is provided with an auxiliary steering oil port 421 , and the main steering valve 43 is provided with a main steering oil port 431 .

[0023] The screw shaft 3 includes a screw body 31, one side of the screw body 31 is provided with a hollow tubular screw barrel 32, the outer wall of the screw barrel 32 is provided with a plurality of upper chamber oil ports 321, a plurality of lower chamber oil ports 322, a plurality of main valve oil inlets 323, a plurality of main valve oil outlets 324, a plurality of clockwise high-pressure boosting oil ports 325, a plurality of auxiliary valve oil outlets 326 and a plurality of counterclockwise high-pressure boosting oil ports 327.

[0024] The upper chamber oil port 321, the lower chamber oil port 322, the main valve oil inlet 323, the main valve oil outlet 324, the clockwise high-pressure boosting oil port 325, the auxiliary valve oil outlet 326 and the counterclockwise high-pressure boosting oil port 327 are all circumferentially arranged on the outer wall of the screw barrel 32, and the distances between the upper chamber oil port 321, the lower chamber oil port 322, the main valve oil inlet 323, the main valve oil outlet 324, the clockwise high-pressure boosting oil port 325, the auxiliary valve oil outlet 326 and the counterclockwise high-pressure boosting oil port 327 and the screw body 31 gradually increase.

[0025] The working mode of the dual-circuit large-flow integral recirculating ball steering gear 1 is described below.

[0026] First, the main valve oil circuit is explained.

[0027] When the input shaft 4 rotates clockwise, the hydraulic oil enters the screw barrel 32 from the upper chamber oil port 321 , and the lower chamber hydraulic oil returns to the main steering valve 43 from the lower chamber oil port 322 through the main steering oil port 431 .

[0028] When the input shaft 4 rotates counterclockwise, the hydraulic oil enters the screw barrel 32 from the lower chamber oil port 322 , and the upper chamber hydraulic oil returns to the main steering valve 43 from the upper chamber oil port 321 through the main steering oil port 431 .

[0029] The power assist oil circuit is described below.

[0030] When the input shaft 4 rotates clockwise, the hydraulic oil enters the oil cylinder from the clockwise high-pressure boosting oil port 324 , and the hydraulic oil returns to the auxiliary steering valve 42 from the counterclockwise high-pressure boosting oil port 327 through the auxiliary steering oil port 421 .

[0031] When the input shaft 4 rotates counterclockwise, the hydraulic oil enters the oil cylinder from the counterclockwise high-pressure boosting oil port 327 , and the hydraulic oil returns to the auxiliary steering valve 42 from the clockwise high-pressure boosting oil port 325 through the auxiliary steering oil port 421 .

[0032] When the steering oil pump is turned on, the system flow reaches 40-80L / min. The two rotary valve systems ensure that the hydraulic oil can pass through quickly without generating a large back pressure, thus protecting the entire steering system.

[0033] The dual-circuit, large-flow, integral recirculating ball steering gear can be connected to two sets of oil inlet and return pump systems to meet the needs of large-scale lifting vehicles with large flows. In addition to providing normal power assistance, the steering gear can be connected to two sets of oil cylinders at the same time to control the direction of hydraulic oil, meeting the design requirements of multiple steering power cylinders for lifting vehicles. Different power oil ports are controlled by main and auxiliary rotary valves respectively to improve the reliability of product use. In addition, the steering gear has a similar structure to conventional steering gears, does not need to change the installation dimensions, and has compact installation dimensions.

[0034] Without limitation to this, any changes or substitutions that are not conceived through creative work should be included in the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope defined in the claims.

Claims

1. A dual-circuit large-flow integral recirculating ball steering gear, characterized in that: The dual-circuit large-flow integral recirculating ball steering gear (1) comprises a housing (2), wherein an input shaft (4) and a screw shaft (3) are arranged in the housing (2), and the screw shaft (3) is sleeved on the outside of the input shaft (4). The input shaft (4) comprises a rod-shaped input main shaft (41), on which a hollow auxiliary steering valve (42) and a hollow main steering valve (43) are provided. The screw shaft (3) comprises a screw body (31), a hollow tubular screw barrel (32) is provided on one side of the screw body (31), and the outer wall of the screw barrel (32) is provided with a plurality of upper chamber oil ports (321), a plurality of lower chamber oil ports (322), a plurality of main valve oil inlets (323), a plurality of main valve oil outlets (324), a plurality of clockwise high-pressure boosting oil ports (325), a plurality of auxiliary valve oil outlets (326), and a plurality of counterclockwise high-pressure boosting oil ports (327). Furthermore, the distances from the upper chamber oil port (321), the lower chamber oil port (322), the main valve oil inlet (323), the main valve oil outlet (324), the clockwise high-pressure boosting oil port (325), the auxiliary valve oil outlet (326) and the counterclockwise high-pressure boosting oil port (327) to the screw body (31) gradually increase.

2. The dual-circuit large-flow integral recirculating ball steering gear according to claim 1 is characterized in that: The auxiliary steering valve (42) is provided with an auxiliary steering oil port (421), and the main steering valve (43) is provided with a main steering oil port (431).

3. The dual-circuit large-flow integral recirculating ball steering gear according to claim 1 is characterized in that: The upper chamber oil port (321), the lower chamber oil port (322), the main valve oil inlet (323), the main valve oil outlet (324), the clockwise high-pressure boosting oil port (325), the auxiliary valve oil outlet (326) and the counterclockwise high-pressure boosting oil port (327) are all circumferentially arranged on the outer wall of the screw barrel (32).

4. The dual-circuit large-flow integral recirculating ball steering gear according to claim 1 is characterized in that: The diameters of the upper chamber oil port (321), the lower chamber oil port (322), the main valve oil inlet (323), the main valve oil outlet (324), the clockwise high-pressure boosting oil port (325), the auxiliary valve oil outlet (326) and the counterclockwise high-pressure boosting oil port (327) are all 6 mm.

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