Hydraulic auxiliary device for rear suspension of tractor in bowing steering mode

Abstract

The invention discloses a hydraulic auxiliary device for a rear suspension of an articulated steering tractor, which comprises a front frame, two front frame connecting seats are fixedly mounted on one side of the front frame, rear frame connecting seats are hinged to the surfaces of the front frame connecting seats, a rear frame is fixedly mounted on the outer surfaces of the rear frame connecting seats, and the rear frame connecting seats are hinged to the rear frame connecting seats. Steering oil cylinders are arranged on the two sides between the front frame and the rear frame, a first driving oil cylinder is arranged on one side of one steering oil cylinder, and a second driving oil cylinder is arranged on one side of the other steering oil cylinder. By pushing and pulling a steering oil cylinder on a tractor, hydraulic oil in cylinder cavities of the first driving oil cylinder and the second driving oil cylinder is driven to move according to oil ways of the first oil way and the second oil way through connection of the oil ways, and the first driven oil cylinder and the second driven oil cylinder are driven to stretch out and draw back; the left and right positions of the first hanging plate and the second hanging plate are adjusted, so that the auxiliary function of the device is completed.

Description

Technical Field

[0001] This invention relates to the field of tractor suspension technology, specifically to a hydraulic auxiliary device used on the rear suspension of a tractor with a slalom steering mechanism. Background Technology

[0002] Wheeled tractors are generally divided into two types of steering: front-wheel steering and articulated slack-steering. Front-wheel steering tractors are more common and have wider applicability, while low-horsepower tractors with articulated slack-steering are generally suitable for use in hilly and mountainous areas, and high-horsepower tractors with articulated slack-steering are mostly used in large farms.

[0003] When a tractor with a folding steering mechanism turns, the front and rear frames fold in opposite directions, causing the implements mounted on the rear suspension to sway in the direction of the turn. While this swaying has little impact on towed implements, it has a greater impact on suspended implements. Firstly, when the implement is fully lifted off the ground by the suspension, the center of gravity of the tractor and implement will shift towards the direction of the turn when turning on a road or in a field. This can lead to a risk of tipping over due to excessive speed or uneven ground. Secondly, when the implement is in the ground, the lateral force of the swaying during the folding steering can damage the implement and suspension. The lateral force also reduces the operator's comfort and increases the difficulty of operating the implement.

[0004] Therefore, to address the shortcomings of existing solutions, we propose a hydraulic auxiliary device for the rear suspension of tractors with a slack-steering mechanism. This hydraulic auxiliary device effectively solves and mitigates the aforementioned problems caused by slack-steering, thereby reducing the risk of rollover, improving the comfort of operating the implement, and increasing the working efficiency of the machine. Summary of the Invention

[0005] The purpose of this invention is to provide a hydraulic auxiliary device for the rear suspension of a tractor with a slack-beam steering mechanism, in order to solve the problems mentioned in the background art, such as the tendency of existing tractor rear suspensions to tip over when slack-beam steering and the high difficulty of controlling agricultural implements.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a hydraulic auxiliary device for the rear suspension of a tractor with a slack-steering mechanism, comprising a front frame, two front frame connecting seats fixedly mounted on one side of the front frame, a rear frame connecting seat hinged to the surface of the front frame connecting seats, a rear frame fixedly mounted on the outer surface of the rear frame connecting seats, steering cylinders provided on both sides between the front and rear frames, a first active cylinder on one side of one steering cylinder, a second active cylinder on one side of the other steering cylinder, a first suspension plate rotatably connected to one side of the rear surface of the rear frame, a second suspension plate rotatably connected to the other side of the rear surface of the rear frame, a first driven cylinder between the first suspension plate and the rear frame, and a second driven cylinder between the second suspension plate and the rear frame.

[0007] Preferably, the rear frame is internally provided with a second oil circuit and a first oil circuit. The first oil circuit is connected to the oil outlet of the first active cylinder and the first driven cylinder, and is connected to the oil inlet of the second active cylinder and the second driven cylinder. The second oil circuit is connected to the oil inlet of the first active cylinder and the first driven cylinder, and is connected to the oil outlet of the second active cylinder and the second driven cylinder. A calibration switch is provided between the first oil circuit and the second oil circuit.

[0008] Preferably, both ends of the first and second active hydraulic cylinders are rotatably connected to the front frame and the rear frame respectively via hydraulic cylinder connecting seats; both ends of the first driven hydraulic cylinder are rotatably connected to the rear frame and the first suspension plate respectively via hydraulic cylinder connecting seats; and both ends of the second driven hydraulic cylinder are rotatably connected to the rear frame and the second suspension plate respectively via hydraulic cylinder connecting seats.

[0009] Preferably, two pins are fixedly installed on the rear surface of the rear frame, and both the first suspension plate and the second suspension plate are rotatably connected to the rear frame through the pins.

[0010] Preferably, both the front and rear frames are equipped with axles, and tires are rotatably connected to both ends of the axles. High-pressure oil tanks are fixedly installed on both sides of the rear frame. The two high-pressure oil tanks are respectively connected to oil circuit number one and oil circuit number two. The high-pressure oil tanks are located above oil circuit number one and oil circuit number two. The high-pressure oil tanks are equipped with sealing caps.

[0011] Preferably, a frame connecting shaft is rotatably mounted between the front frame connecting seat and the rear frame connecting seat.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This invention utilizes the push and pull of the steering cylinder on the tractor to drive the hydraulic oil in the cylinder chambers of the first and second active cylinders through the connection of the oil circuits. According to the oil circuit positions of the first and second oil circuits, the first and second driven cylinders are respectively driven to extend and retract, thereby adjusting the left and right positions of the first and second suspension plates, thus completing the auxiliary function of this device. Attached Figure Description

[0014] Figure 1 This is a side view of the entire invention;

[0015] Figure 2 This is a top view of the invention in the AA direction (path diagram of oil passage No. 1);

[0016] Figure 3 This is a top view of the invention in the BB direction (Diagram of oil passage No. 2).

[0017] In the diagram: 1. Tire; 2. Axle; 3. Front frame; 4. Steering cylinder; 5. Rear frame; 6. Front frame connecting seat; 7. Rear frame connecting seat; 8. Frame connecting shaft; 9. First driving cylinder; 10. Second driving cylinder; 11. First driven cylinder; 12. Second driven cylinder; 13. Cylinder connecting seat; 14. Pin; 15. First suspension plate; 16. Second suspension plate; 17. No. 1 oil circuit; 18. No. 2 oil circuit; 19. High-pressure oil reservoir; 20. Calibration switch. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0019] Please see Figures 1 to 3 An embodiment of the present invention provides a hydraulic auxiliary device for the rear suspension of a tractor with a folding steering mechanism, comprising a front frame 3, two front frame connecting seats 6 fixedly mounted on one side of the front frame 3, a rear frame connecting seat 7 hinged to the surface of the front frame connecting seat 6, a rear frame 5 fixedly mounted on the outer surface of the rear frame connecting seat 7, and steering cylinders 4 provided on both sides between the front frame 3 and the rear frame 5, one side of one steering cylinder 4 having a first active cylinder 9, and the other side of the other steering cylinder 4 having a second active cylinder 10, a first suspension plate 15 rotatably connected to one side of the rear surface of the rear frame 5, and a second suspension plate 16 rotatably connected to the other side of the rear surface of the rear frame 5, a first driven cylinder 11 provided between the first suspension plate 15 and the rear frame 5, and a second driven cylinder 12 provided between the second suspension plate 16 and the rear frame 5.

[0020] The rear frame 5 is equipped with a second oil passage 18 and a first oil passage 17. The first oil passage 17 is connected to the oil outlet of the first active cylinder 9 and the first driven cylinder 11, and is connected to the oil inlet of the second active cylinder 10 and the second driven cylinder 12. The second oil passage 18 is connected to the oil inlet of the first active cylinder 9 and the first driven cylinder 11, and is connected to the oil outlet of the second active cylinder 10 and the second driven cylinder 12. A calibration switch 20 is provided between the first oil passage 17 and the second oil passage 18. When the calibration switch 20 is turned on, the connection between the first oil passage 17 and the second oil passage 18 is adjusted, which facilitates the correction of the left and right symmetrical positions of the first suspension plate 15 and the second suspension plate 16. When the calibration switch 20 is turned off, the first oil passage 17 and the second oil passage 18 are closed, so that the device can automatically adjust the position of the implement's center of gravity when turning.

[0021] This device utilizes the push and pull of the steering cylinder 4 on the tractor to drive the hydraulic oil in the cylinder chambers of the first active cylinder 9 and the second active cylinder 10 through the connection of the oil circuits. According to the oil circuit positions of oil circuit 17 and oil circuit 18, the first driven cylinder 11 and the second driven cylinder 12 are respectively driven to extend and retract, thereby adjusting the left and right positions of the first suspension plate 15 and the second suspension plate 16, thus completing the auxiliary function of this device.

[0022] Both ends of the first active hydraulic cylinder 9 and the second active hydraulic cylinder 10 are rotatably connected to the front frame 3 and the rear frame 5 respectively through the hydraulic cylinder connecting seat 13. Both ends of the first driven hydraulic cylinder 11 are rotatably connected to the rear frame 5 and the first suspension plate 15 respectively through the hydraulic cylinder connecting seat 13. Both ends of the second driven hydraulic cylinder 12 are rotatably connected to the rear frame 5 and the second suspension plate 16 respectively through the hydraulic cylinder connecting seat 13.

[0023] Two pins 14 are fixedly mounted on the rear surface of the rear frame 5. The first suspension plate 15 and the second suspension plate 16 are rotatably connected to the rear frame 5 via the pins 14. Both the front frame 3 and the rear frame 5 have axles 2 inside. Tires 1 are rotatably connected to both ends of the axles 2. High-pressure oil tanks 19 are fixedly mounted on both sides of the rear frame 5. The two high-pressure oil tanks 19 are respectively connected to oil line 17 and oil line 18, and are positioned above oil lines 17 and 18. A frame connecting shaft 8 is rotatably mounted between the front frame connecting seat 6 and the rear frame connecting seat 7. The high-pressure oil tanks 19 are equipped with sealing caps. By placing the high-pressure oil storage tank 19 above the first oil circuit 17 and the second oil circuit 18, it is convenient to generate hydraulic differential, thereby venting the air in the oil circuit and avoiding jamming when turning. Furthermore, the sealing cap prevents air from entering the high-pressure oil storage tank 19, ensuring that the first oil circuit 17 and the second oil circuit 18 are used as high-pressure closed oil circuits, while also achieving the buffering function during the operation of the hydraulic auxiliary device.

[0024] The hydraulic auxiliary device used on the rear suspension of this tractor with its bend-over steering mechanism operates by coordinating hydraulic lines 17 and 18. When the tractor turns left, the steering cylinder 4 pulls the front frame 3, causing it to retract to the left. At this time, under the articulated pressure of the front frame 3 and the rear frame 5, the first active cylinder 9 retracts. Simultaneously, the second active cylinder 10, corresponding to the first active cylinder 9, extends outward under the articulated tension of the two frames. The contraction and extension of the first and second active cylinders 9 and 10 cause changes in the hydraulic oil within the cylinder chambers, from... The hydraulic oil flowing in the first oil circuit 17 creates a suction force, while the hydraulic oil flowing in the second oil circuit 18 creates a thrust force. This simultaneously causes the hydraulic oil in the cylinder chambers of the first driven cylinder 11 and the second driven cylinder 12 to change, thereby extending the first driven cylinder 11 and shortening the second driven cylinder 12. This indirectly causes the first suspension plate 15 and the second suspension plate 16 to swing to the right, thus completing the dual functions of swinging and positioning of the implement and adjusting the center of gravity of this hydraulic auxiliary device. When the tractor turns right, the principle is mirrored with turning left, and the first suspension plate 15 and the second suspension plate 16 will swing to the left.

[0025] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hydraulic auxiliary device for the rear suspension of a tractor with a slalom steering mechanism, comprising a front frame (3), characterized in that: Two front frame connecting seats (6) are fixedly installed on one side of the front frame (3). The surface of the front frame connecting seat (6) is hinged to the rear frame connecting seat (7). The outer surface of the rear frame connecting seat (7) is fixedly installed to the rear frame (5). Steering cylinders (4) are provided on both sides between the front frame (3) and the rear frame (5). One of the steering cylinders (4) is provided with a first active cylinder (9) on one side, and a second active cylinder (10) is provided on one side of the other steering cylinder (4). A first suspension plate (15) is rotatably connected to one side of the rear surface of the rear frame (5), and a second suspension plate (16) is rotatably connected to the other side of the rear surface of the rear frame (5). A first driven cylinder (11) is provided between the first suspension plate (15) and the rear frame (5), and a second driven cylinder (12) is provided between the second suspension plate (16) and the rear frame (5).

2. The hydraulic auxiliary device for the rear suspension of a tractor with a slalom steering mechanism according to claim 1, characterized in that: The rear frame (5) is equipped with a No. 2 oil circuit (18) and a No. 1 oil circuit (17) respectively. The first oil passage (17) is connected to the oil outlet of the first active oil cylinder (9) and the first driven oil cylinder (11), and the first oil passage (17) is connected to the oil inlet of the second active oil cylinder (10) and the second driven oil cylinder (12). The second oil passage (18) is connected to the oil inlet of the first active oil cylinder (9) and the first driven oil cylinder (11), and the second oil passage (18) is connected to the oil outlet of the second active oil cylinder (10) and the second driven oil cylinder (12).

3. The hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 1, characterized in that: A calibration switch (20) is provided between the No. 1 oil circuit (17) and the No. 2 oil circuit (18).

4. The hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 1, characterized in that: Both ends of the first active cylinder (9) and the second active cylinder (10) are rotatably connected to the front frame (3) and the rear frame (5) respectively through the cylinder connecting seat (13); Both ends of the first driven cylinder (11) are rotatably connected to the rear frame (5) and the first suspension plate (15) respectively through the cylinder connecting seat (13); Both ends of the second driven cylinder (12) are rotatably connected to the rear frame (5) and the second suspension plate (16) respectively through the cylinder connecting seat (13).

5. A hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 1, characterized in that: Two pins (14) are fixedly installed on the rear surface of the rear frame (5). The first suspension plate (15) and the second suspension plate (16) are rotatably connected to the rear frame (5) through the pins (14).

6. A hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 2, characterized in that: Both the front frame (3) and the rear frame (5) are equipped with axles (2), and both ends of the axles (2) are rotatably connected to tires (1).

7. A hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 1, characterized in that: High-pressure oil tanks (19) are fixedly installed on both sides of the rear frame (5), and the two high-pressure oil tanks (19) are respectively connected to the first oil line (17) and the second oil line (18).

8. A hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 7, characterized in that: The high-pressure oil storage tanks (19) are all located above the No. 1 oil line (17) and the No. 2 oil line (18), and the high-pressure oil storage tanks (19) are equipped with sealing caps.

9. A hydraulic auxiliary device for the rear suspension of a tractor with a bend-over steering mechanism according to claim 1, characterized in that: A frame connecting shaft (8) is rotatably mounted between the front frame connecting seat (6) and the rear frame connecting seat (7).

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