Hydraulic front steering mechanism of tractor chassis

Abstract

The utility model belongs to a tractor steering device, and particularly relates to a hydraulic front steering mechanism of a tractor chassis, which comprises a ball cage, a connecting piece, a telescopic rod, a rear hydraulic oil cylinder, a front hub, a connecting frame, a half shaft sleeve, a balance rod, a front hydraulic oil cylinder, a limit spring and a mounting frame. By means of the design, the steering device of the tractor chassis and the tractor are provided, through the design of the front hydraulic cylinder and the rear hydraulic cylinder, the front portion of the chassis can steer, meanwhile, front wheels can steer for the second time, and the steering angle is increased through the design; through combination of telescopic rods and limiting springs, the front hydraulic rods stretch out and draw back, stability of the front wheels is kept, and shaking between the front wheels and the front hydraulic rods is prevented; the design that the brake helmet and the brake pump are matched with the supercharger is adopted, so that the brake safety is enhanced; the steering device of the tractor chassis is wide in application range.

Description

Technical Field

[0001] The utility model belongs to a steering device of a tractor, and particularly relates to a hydraulic front steering mechanism of a tractor chassis. Background Art

[0002] As a heavy machinery widely used in the agricultural field, the design of the steering system of a tractor is crucial for improving operation efficiency and ensuring operation safety. However, the steering angles of many tractors on the current market are relatively small, which to a certain extent limits their flexibility and practicability in complex tillage environments. In some occasions where large-angle steering is required for effective operation, such as narrow fields, irregular terrains or areas where fine operations are needed, this steering system seems inadequate.

[0003] Due to the limitation of the steering angle, a tractor may encounter obstacles when performing certain complex tillage tasks, and even need to repeatedly adjust its position to complete the operation, which not only reduces work efficiency but also increases the complexity of operation. More seriously, if the operator adopts improper driving methods to force the steering, safety accidents may occur, such as the tractor overturning, colliding with obstacles or causing harm to the operator himself. This situation is quite dangerous in the use of agricultural machinery and requires sufficient attention.

[0004] Therefore, there is an urgent need for a technology in the prior art to solve the above problems. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is: to provide a device for solving the problems existing in the background art.

[0006] A hydraulic front steering mechanism of a tractor chassis, characterized in that: it includes a constant velocity joint, a connecting piece, a telescopic rod, a rear hydraulic cylinder, a front wheel hub, a connecting frame, a half shaft sleeve, a balance rod, a front hydraulic cylinder and a limiting spring;

[0007] The constant velocity joint is arranged on the front wheel hub, the number of the constant velocity joints is two, and a balance rod is hinged between the two constant velocity joints, and the two constant velocity joints are respectively connected to the two ends of the half shaft sleeve, and the half shaft sleeve is connected to the tractor gearbox; the connecting piece is arranged on the constant velocity joint;

[0008] The number of the telescopic rods, the rear hydraulic cylinders and the front hydraulic cylinders is two;

[0009] The output end of the front hydraulic cylinder is hinged to the connecting piece, and the tail of the front hydraulic cylinder is hinged to the connecting frame, the two ends of the telescopic rod are respectively hinged to the connecting piece and the connecting frame, and a limiting spring is sleeved on the telescopic rod;

[0010] The two rear hydraulic cylinders are arranged on the tractor chassis, and their output ends are hinged to the connecting frame. The connection positions of the two rear hydraulic cylinders and the connecting frame are at both ends of the connecting frame.

[0011] The middle part of the connecting frame is hinged to the tractor chassis.

[0012] The connecting piece includes a connecting disc, connecting plate I and connecting plate II. The connecting disc, connecting plate I and connecting plate II are fixedly connected by metal parts. The connecting disc is connected to the constant velocity joint. Connecting plate I is hinged to the end of the telescopic rod. Connecting plate II is arranged below connecting plate I, and connecting plate II is hinged to the front hydraulic cylinder.

[0013] A brake helmet is arranged on the constant velocity joint. The brake helmet is connected to the brake pump, and a supercharger is provided for supporting the brake pump.

[0014] A mounting bracket is fixedly arranged at the front end of the constant velocity joint, and the mounting bracket is hinged to the balance rod.

[0015] Both ends of the limiting spring are fixedly connected to both ends of the telescopic rod.

[0016] Cylinders are arranged at both ends of the connecting frame, and the cylinders are used for hinging with the telescopic rod and the front hydraulic cylinder.

[0017] The connection mode between the connecting piece and the constant velocity joint is fixed connection.

[0018] Through the above design, a steering device for a tractor chassis and a tractor are provided. Through the design of the front and rear two sets of hydraulic cylinders, while the front part of the chassis can be steered, the front wheels can perform a second steering, and such a design improves the steering angle; and through the combination of the telescopic rod and the limiting spring, the front hydraulic rod keeps the front wheels stable during telescoping, preventing shaking between the front wheels and the front hydraulic rod; and by adopting the design of the brake helmet and the brake pump supporting the supercharger, the safety of braking is enhanced; a steering device for a tractor chassis with a wide range of applications is provided. Brief Description of the Drawings

[0019] The following further describes the present invention in conjunction with the drawings and specific embodiments:

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is Figure 1 a partial enlarged view of area A in

[0022] Figure 3 is a top view of the present invention;

[0023] In the figure: 1 - Constant velocity joint, 2 - Connecting piece, 3 - Telescopic rod, 5 - Rear hydraulic cylinder, 6 - Front wheel hub, 7 - Connecting frame, 9 - Half shaft sleeve, 10 - Balance bar, 11 - Front hydraulic cylinder, 12 - Limit spring, 16 - Mounting bracket. Detailed implementation mode

[0024] The present application will be further described in conjunction with the accompanying drawings:

[0025] A hydraulic front steering mechanism for a tractor chassis, characterized in that it includes a constant velocity joint 1, a connecting piece 2, a telescopic rod 3, a rear hydraulic cylinder 5, a front wheel hub 6, a connecting frame 7, a half shaft sleeve 9, a balance bar 10, a front hydraulic cylinder 11 and a limit spring 12;

[0026] The constant velocity joint 1 is arranged on the front wheel hub 6, the number of the constant velocity joints 1 is two, a balance bar 10 is hinged between the two constant velocity joints 1, and the two constant velocity joints 1 are respectively connected to both ends of the half shaft sleeve 9, and the half shaft sleeve 9 is connected to the tractor gearbox; the connecting piece 2 is arranged on the constant velocity joint 1;

[0027] The number of the telescopic rods 3, the rear hydraulic cylinders 5 and the front hydraulic cylinders 11 is two;

[0028] The output end of the front hydraulic cylinder 11 is hinged to the connecting piece 2, and the tail of the front hydraulic cylinder 11 is hinged to the connecting frame 7. The two ends of the telescopic rod 3 are respectively hinged to the connecting piece 2 and the connecting frame 7, and a limit spring 12 is sleeved on the telescopic rod 3;

[0029] The two rear hydraulic cylinders 5 are arranged on the tractor chassis, and their output ends are hinged to the connecting frame 7. The connection positions of the two rear hydraulic cylinders 5 and the connecting frame 7 are at both ends of the connecting frame 7;

[0030] The middle of the connecting frame 7 is hinged to the tractor chassis.

[0031] The connecting piece 2 includes a connecting disc 203, a connecting plate I201 and a connecting plate II202. The connecting disc 203, the connecting plate I201 and the connecting plate II202 are fixedly connected by metal parts. The connecting disc 203 is connected to the constant velocity joint 1, the connecting plate I201 is hinged to the end of the telescopic rod 3, the connecting plate II202 is arranged below the connecting plate I201, and the connecting plate II202 is hinged to the front hydraulic cylinder 11.

[0032] A brake helmet is arranged on the constant velocity joint 1. The brake helmet is connected to a brake pump, and a supercharger is arranged in a supporting manner for the brake pump.

[0033] A mounting bracket 16 is fixedly arranged at the front end of the constant velocity joint 1, and the mounting bracket 16 is hinged to the balance bar 10.

[0034] Both ends of the limiting spring 12 are fixedly connected to both ends of the telescopic rod 3 respectively.

[0035] Both ends of the connecting frame 7 are provided with cylinders, and the cylinders are used for hinged connection with the telescopic rod 3 and the front hydraulic cylinder 11.

[0036] An annular groove is provided on the cylinder, and a circular ring matching the annular groove is provided at the end of the telescopic rod 3;

[0037] The balance rod 10 is hinged to the ends of the two constant velocity joints 1, so that the two constant velocity joints 1 move synchronously;

[0038] The front hydraulic cylinder 11 is hinged to the constant velocity joint 1. By controlling the expansion and contraction of the front hydraulic cylinder 11, the left - right steering of the constant velocity joint 1 is controlled, driving the front wheel hub 6 to turn, and realizing the steering of the tractor;

[0039] The connection mode of the connecting piece 2 and the constant velocity joint 1 is fixed connection;

[0040] The combination of the telescopic rod 3 and the limiting spring 12 is used to limit the steering force of the constant velocity joint 1, ensuring the stability of the connection between the constant velocity joint 1 and the connecting frame 7;

[0041] When the telescopic rod 3 extends or contracts, since both ends of the limiting spring 12 are fixedly connected to both ends of the telescopic rod 3 respectively, the limiting spring 12 will play a role in restricting the expansion and contraction of the telescopic rod 3;

[0042] The middle part of the connecting frame 7 is hinged to the tractor frame and the tractor chassis, and both ends of the connecting frame 7 are connected to the rear hydraulic cylinder 5. The rear hydraulic cylinder 5 is arranged on the tractor chassis. In this way, when the rear hydraulic cylinder 5 works, the connecting frame 7 will deflect left and right, achieving the effect of turning left and right.

[0043] Through the steering combination of the constant velocity joint 1 and the front hydraulic cylinder 11 and the steering combination of the connecting frame 7 and the rear hydraulic cylinder 5, the steering angle is enlarged;

[0044] A brake helmet is provided on the constant velocity joint 1. The brake helmet is connected to a brake pump, and a supercharger is provided for supporting the brake pump. Through the design of the brake helmet and the brake pump, the braking safety of the steering system during steering is improved.

Claims

1. A hydraulic front steering mechanism for a tractor chassis, characterized in that: It comprises a ball cage (1), a connecting piece (2), a telescopic rod (3), a rear hydraulic cylinder (5), a front wheel hub (6), a connecting frame (7), a half-axle sleeve (9), a balancing rod (10), a front hydraulic cylinder (11) and a limit spring (12); The ball cage (1) is arranged on the front wheel hub (6), the number of the ball cages (1) is two, and a balance rod (10) is hingedly arranged between the two ball cages (1), and the two ball cages (1) are respectively connected to the two ends of the half-axle sleeve (9), and the half-axle sleeve (9) is connected to the tractor gearbox; the connecting piece (2) is arranged on the ball cage (1); The number of the telescopic rod (3), the rear hydraulic cylinder (5) and the front hydraulic cylinder (11) is two; The output end of the front hydraulic cylinder (11) is hinged to the connecting piece (2), and the tail of the front hydraulic cylinder (11) is hinged to the connecting frame (7), the two ends of the telescopic rod (3) are respectively hinged to the connecting piece (2) and the connecting frame (7), and a limit spring (12) is sleeved on the telescopic rod (3); The two rear hydraulic cylinders (5) are arranged on the tractor chassis, and their output ends are hinged to the connecting frame (7), and the connection positions of the two rear hydraulic cylinders (5) and the connecting frame (7) are at both ends of the connecting frame (7); The middle part of the connecting frame (7) is hinged to the tractor chassis.

2. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: The connecting member (2) comprises a connecting disc (203), a connecting plate I (201) and a connecting plate II (202); the connecting disc (203), the connecting plate I (201) and the connecting plate II (202) are fixedly connected via metal parts; the connecting disc (203) is connected to the ball cage (1); the connecting plate I (201) is hinged to the end of the telescopic rod (3); the connecting plate II (202) is arranged below the connecting plate I (201); and the connecting plate II (202) is hinged to the front hydraulic cylinder (11).

3. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: The ball cage (1) is provided with a brake helmet, the brake helmet is connected to a brake pump, and the brake pump is provided with a booster.

4. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: A mounting frame (16) is fixedly provided at the front end of the ball cage (1), and the mounting frame (16) is hinged to the balancing rod (10).

5. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: The two ends of the limit spring (12) are respectively fixedly connected to the two ends of the telescopic rod (3).

6. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: Cylinders are provided at both ends of the connecting frame (7), and the cylinders are used to be hinged with the telescopic rod (3) and the front hydraulic cylinder (11).

7. The hydraulic front steering mechanism of the tractor chassis according to claim 1, characterized in that: The connection mode between the connecting piece (2) and the ball cage (1) is a fixed connection.

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