Hydraulic steering device of self-propelled land preparation machine

Abstract

A hydraulic steering device of a self-propelled land preparation machine comprises a steering wheel, a hydraulic steering gear and an angle turning device, the steering wheel is installed on a rack of the self-propelled land preparation machine through the hydraulic steering gear, the angle turning device is vertically and fixedly installed at the front end of the rack through a bearing installation base, and a rotating shaft sleeve is rotatably installed in the bearing installation base through a bearing; the bottom end of the rotating shaft sleeve is fixedly connected with a shell of the front axle through a connecting cylinder seat, the two sides of the rack are each provided with a driving oil cylinder, piston shafts of the driving oil cylinders are hinged to pushing hinge lugs transversely and fixedly arranged at the upper end of the connecting cylinder seat, and the hydraulic steering gear and the driving oil cylinders are connected with a hydraulic system. A power output shaft of the angle turning device extends into the top of the rotating shaft sleeve and is connected with a power shaft through a spline shaft connecting sleeve, and the power shaft is connected with a power input shaft or a power input gear of the front axle. According to the hydraulic steering device, the front axle is hydraulically driven to rotate and steer integrally, the mounting position of a steering mechanism can be raised, the steering mechanism is not prone to being soaked by muddy water, and the service life of the steering mechanism is long.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of agricultural more has, specifically is a hydraulic steering device of self -propelled land leveler. BACKGROUND

[0002] Before the planting of crops and economic crops, the land used for planting needs to be ploughed and processed. Traditional farmland ploughing is to use cattle to pull a plow and a harrow to cultivate, which is low in efficiency, high in labor intensity, requires a person to raise cattle, and is high in cost.

[0003] With the development of science and technology and the increasing of China's economic strength, China's agriculture has also developed rapidly, and various agricultural machinery products have been applied to thousands of households. Their development saves labor and greatly improves labor efficiency and promotes the development of agriculture. Before planting grasses, emergent plants and the like in paddy fields, the paddy fields need to be ploughed, which requires the use of a ploughing machine. The ploughing machine is driven by a diesel engine or a gasoline engine and is provided with a plowing wheel on a walking driving bridge. During plowing, the plowing wheel serves as both a walking wheel and a plowing wheel. Most traditional plowing machines are small hand-held plowing machines, which have a small plowing width and low plowing efficiency, and are high in labor intensity for hand-held operation. In order to improve plowing efficiency and reduce labor intensity, people have developed a double-bridge four-wheel self-propelled land leveler. Since the double-bridge four-wheel self-propelled land leveler works in the field, the working environment is poor. If a traditional automobile steering mechanism is used, the steering driving mechanism is close to the ground and is easily wetted by mud and water, which can easily cause damage to the steering knuckle and universal joint and shorten the service life. In view of this, it is necessary to design a steering device that is not easily wetted by mud and water and has a long service life. SUMMARY

[0004] The utility model aims at the problems existing in the prior art, and provides a hydraulic steering device of self -propelled land leveler, which adopts hydraulic driving of the whole front axle to rotate and steer. The front axle is connected to the bottom of the front end of the frame through a connecting cylinder seat, which raises the installation position of the steering mechanism, is not easily wetted by mud and water, and has a long service life.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the technical scheme that:

[0006] The hydraulic steering device of the self-propelled land preparation machine comprises a steering wheel, a hydraulic steering gear and a corner gear, the steering wheel is installed on the frame of the self-propelled land preparation machine through the hydraulic steering gear, the corner gear is vertically fixedly installed on the front end of the frame through a bearing mounting seat, a rotating shaft sleeve is rotatably installed in the bearing mounting seat through a bearing, the bottom end of the rotating shaft sleeve is fixedly connected with the shell of the front axle through a connecting cylinder seat, a driving oil cylinder is hingedly installed on each side of the frame through a hinged mounting seat, the piston shaft of the driving oil cylinder is hingedly connected with a pushing hinged lug which is horizontally fixedly arranged on the upper end of the connecting cylinder seat, the hydraulic steering gear and the driving oil cylinder are connected with a hydraulic system, the power output shaft of the corner gear extends from the top of the rotating shaft sleeve, the power output shaft of the corner gear is connected with a power shaft through a flower shaft connecting sleeve, the power shaft passes through the connecting cylinder seat and is connected with the power input shaft or the power input gear of the front axle, the power input shaft of the corner gear is connected with a gearbox body through a universal coupling, the power of the gearbox body is transmitted to the power shaft through the universal coupling and the corner gear, and then is transmitted to the front axle so as to drive the tillage wheel to rotate. The connecting cylinder seat is used for fixedly connecting the rotating shaft sleeve with the shell of the front axle, when the connecting cylinder seat is rotated, the front axle can be integrally rotated with the rotating shaft sleeve as the rotating center.

[0007] Further preferably, the pushing hinged lug is connected with the upper part of the front end of the connecting cylinder seat in a symmetrical fixed connection mode, and the height of the pushing hinged lug is flush with the height of the hinged mounting seat.

[0008] Further preferably, the rotating shaft sleeve adopts a double-bearing fixed form, and the upper and lower ends of the rotating shaft sleeve are rotatably connected with the bearing mounting seat through a bearing respectively.

[0009] Further preferably, the hydraulic system comprises an oil pump, a hydraulic oil tank, a pump oil pipe, an oil return pipe, a first oil supply pipe and a second oil supply pipe, the inlet and outlet of the oil pump are connected with the hydraulic oil tank and the hydraulic steering gear through the pump oil pipe, the oil return port of the hydraulic steering gear is connected with the hydraulic oil tank through the oil return pipe, a radiator is arranged on the oil return pipe, the hydraulic oil is cooled by the radiator and then returned to the hydraulic oil tank, one control inlet and outlet port of the hydraulic steering gear is connected with the oil inlet interface of one driving oil cylinder and the oil outlet interface of the other driving oil cylinder through the first oil supply pipe, and the other control inlet and outlet port of the hydraulic steering gear is connected with the oil outlet interface of one driving oil cylinder and the oil inlet interface of the other driving oil cylinder through the second oil supply pipe. The corresponding oil way is controlled by rotating the steering wheel to drive the hydraulic steering gear, so that the driving oil cylinder on one side is extended and the driving oil cylinder on the other side is retracted, thereby the connecting cylinder seat is driven to rotate the front axle as a whole through the pushing hinged lug to realize steering.

[0010] The hydraulic steering device of the self-propelled land preparation machine connects the shell of the front axle with the bearing mounting seat installed at the front end of the frame through the connecting cylinder seat and the rotating shaft sleeve, the rotating shaft sleeve is rotatably installed in the bearing mounting seat through the bearing, one driving oil cylinder for driving the connecting cylinder seat to drive the front axle to rotate as a whole is installed at each end of the frame, the connecting cylinder seat is used for fixedly connecting the rotating shaft sleeve with the shell of the front axle, when the connecting cylinder seat rotates, the front axle can rotate as a whole with the rotating shaft sleeve as the rotating center, the rotating installation position of the steering mechanism is lifted, so that the steering mechanism is not easily soaked by mud, and the service life of the steering mechanism is long; the corner turner is vertically fixedly installed on the bearing mounting seat, the power output shaft of the corner turner is connected with the power shaft through the hub connecting sleeve, the power shaft passes through the connecting cylinder seat and is connected with the power input shaft or the power input gear of the front axle, the power input shaft of the corner turner is connected with the gearbox body through the universal coupling, the power of the gearbox body is transmitted to the power shaft through the universal coupling and the corner turner, and then is transmitted to the front axle, so as to drive the tillage wheel to rotate, the power transmission performance is reliable, and the overall rotation of the front axle is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a plane structure schematic view of the hydraulic steering device of the self-propelled land preparation machine;

[0012] Figure 2 is Figure 1 is a schematic view of the internal connection structure of the connecting cylinder seat in the self-propelled land preparation machine;

[0013] Figure 3 is Figure 1 is a top view schematic view of the self-propelled land preparation machine;

[0014] Figure 4 is a three-dimensional structure schematic view of the hydraulic steering device of the self-propelled land preparation machine;

[0015] Figure 5 is a schematic view of the hydraulic oil path;

[0016] The name corresponding to the serial number in the figure is:

[0017] 1, steering wheel, 2, hydraulic steering device, 3, frame, 4, hinged mounting seat, 5, driving oil cylinder, 6, universal coupling, 7, corner turner, 8, bearing mounting seat, 9, pushing hinged lug, 10, connecting cylinder seat, 11, front axle, 12, tillage wheel, 13, hub connecting sleeve, 14, bearing, 15, rotating shaft sleeve, 16, power shaft, 17, oil pump, 18, hydraulic oil tank, 19, radiator, 20, oil pump pipe, 21, oil return pipe, 22, oil supply pipe one, 23, oil supply pipe two. DETAILED DESCRIPTION

[0018] In order to introduce the utility model in more detail, the utility model will be further described below in combination with examples and drawings. Embodiment

[0019] The hydraulic steering device of the self-propelled land leveler comprises a steering wheel 1, a hydraulic steering gear 2 and a corner gear 7, the steering wheel 1 is installed on the frame 3 of the self-propelled land leveler through the hydraulic steering gear 2, the corner gear 7 is vertically fixedly installed on the front end of the frame 3 through a bearing mounting seat 8, a rotating shaft sleeve 15 is rotatably installed in the bearing mounting seat 8 through a bearing 14, the bottom end of the rotating shaft sleeve 15 is fixedly connected with the shell of the front axle 11 through a connecting cylinder seat 10, a driving oil cylinder 5 is hingedly installed on the both sides of the frame 3 through a hinged mounting seat 4, the piston shaft of the driving oil cylinder 5 is hinged with a pushing hinged lug 9 which is horizontally fixedly arranged on the upper end of the connecting cylinder seat 10, the hydraulic steering gear 2 and the driving oil cylinder 5 are connected with a hydraulic system, the power output shaft of the corner gear 7 extends from the top of the rotating shaft sleeve 15, the power output shaft of the corner gear 7 is connected with a power shaft 16 through a universal shaft connecting sleeve 13, the power shaft 16 passes through the connecting cylinder seat 10 and is connected with the power input shaft or the power input gear of the front axle 11, the power input shaft of the corner gear 7 is connected with a gearbox body through a universal coupling 6, the power of the gearbox body is transmitted to the power shaft 16 through the universal coupling 6 and the corner gear 7, and then to the front axle 11, so as to drive the tillage wheel 12 to rotate. The connecting cylinder seat 10 is used for fixedly connecting the rotating shaft sleeve 15 with the shell of the front axle 11, when the connecting cylinder seat 10 is rotated, the front axle 11 can be integrally rotated with the rotating shaft sleeve 15 as the rotating center.

[0020] The pushing hinged lug 9 is connected with the upper part of the front end of the connecting cylinder seat 10 in a symmetrical fixed connection mode, the height of the pushing hinged lug 9 is flush with the height of the hinged mounting seat 4.

[0021] The rotating shaft sleeve 15 adopts a double-bearing fixed form, the upper and lower ends of the rotating shaft sleeve 15 are rotatably connected with the bearing mounting seat 8 through a bearing 14.

[0022] The hydraulic system comprises an oil pump 17, a hydraulic oil tank 18, a pump oil pipe 20, a return oil pipe 21, a first oil supply pipe 22 and a second oil supply pipe 23, the oil pump 17 is connected with the hydraulic oil tank 18 and the hydraulic steering gear 2 through the pump oil pipe 20, the return oil pipe 21 is connected with the hydraulic oil tank 18 through a return oil port of the hydraulic steering gear 2, a radiator 19 is installed on the return oil pipe 21, the hydraulic oil is cooled by the radiator 19 and then returned to the hydraulic oil tank 18, a control inlet and outlet port of the hydraulic steering gear 2 is connected with an inlet interface of one driving oil cylinder 5 and an outlet interface of another driving oil cylinder 5 through the first oil supply pipe 22, another control inlet and outlet port of the hydraulic steering gear 2 is connected with the outlet interface of one driving oil cylinder 5 and the inlet interface of another driving oil cylinder 5 through the second oil supply pipe 23. The corresponding oil path is controlled by rotating the steering wheel 1 to drive the hydraulic steering gear 2, so that the driving oil cylinder 5 on one side is extended and the driving oil cylinder 5 on the other side is retracted, thereby driving the front axle 11 to rotate as a whole by pushing the articulated ear 9 to drive the connecting cylinder seat 10, so as to realize steering.

[0023] The above description is not a limitation of the present application, and the present application is not limited to the above examples. Within the scope of the present application, changes, modifications, additions or replacements made by those skilled in the art should be within the protection scope of the present application.

Claims

1. A hydraulic steering device for a self-propelled tillage machine, comprising a steering wheel (1), a hydraulic steering gear (2), and a cornering device (7), wherein the steering wheel (1) is mounted on the frame (3) of the self-propelled tillage machine via the hydraulic steering gear (2), characterized in that: The cornering device (7) is vertically fixed at the front end of the frame (3) via a bearing mounting seat (8). A rotating bushing (15) is rotatably mounted in the bearing mounting seat (8) via a bearing (14). The bottom end of the rotating bushing (15) is fixedly connected to the housing of the front axle (11) via a connecting sleeve seat (10). A drive cylinder (5) is hinged to each side of the frame (3) via a hinge mounting seat (4). The piston shaft of the drive cylinder (5) is hinged to a push hinge ear (9) that is horizontally fixed at the upper end of the connecting sleeve seat (10). The hydraulic steering gear (2) and the drive cylinder (5) are connected to a hydraulic system. The power output shaft of the cornering device (7) extends from the top of the rotating bushing (15). The power output shaft of the cornering device (7) is connected to a power shaft (16) via a flower shaft connecting sleeve (13). The power shaft (16) passes through the connecting sleeve seat (10) and is connected to the power input shaft or power input gear of the front axle (11).

2. The hydraulic steering device of the self-propelled land leveling machine according to claim 1, characterized in that: The push hinge ear (9) extends out and connects to the upper front end of the connecting cylinder seat (10) to form a symmetrical fixed connection. The height of the push hinge ear (9) is flush with the height of the hinge mounting seat (4).

3. The hydraulic steering device of the self-propelled land leveling machine according to claim 1, characterized in that: The rotating bushing (15) adopts a double bearing fixing form, and the upper and lower ends of the rotating bushing (15) are respectively rotatably connected to the bearing mounting seat (8) through a bearing (14).

4. The hydraulic steering device of the self-propelled land leveling machine according to claim 1, characterized in that: The hydraulic system includes an oil pump (17), a hydraulic oil tank (18), a pump oil pipe (20), a return oil pipe (21), an oil supply pipe one (22), and an oil supply pipe two (23). The inlet and outlet of the oil pump (17) are connected to the hydraulic oil tank (18) and the hydraulic steering gear (2) respectively through the pump oil pipe (20). The return oil port of the hydraulic steering gear (2) is connected to the hydraulic oil tank (18) through the return oil pipe (21). A radiator (19) is installed on the return oil pipe (21). One control inlet and outlet port of the hydraulic steering gear (2) is connected to the inlet port of one drive cylinder (5) and the outlet port of another drive cylinder (5) through the oil supply pipe one (22). The other control inlet and outlet port of the hydraulic steering gear (2) is connected to the outlet port of one drive cylinder (5) and the inlet port of another drive cylinder (5) through the oil supply pipe two (23).

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