Pull rod type front steering mechanism of tractor chassis

Abstract

The utility model belongs to a tractor steering device, and particularly relates to a pull rod type front steering mechanism of a tractor chassis, which comprises a ball cage, a connecting piece, a front telescopic rod, a rear telescopic rod, a front hub, a connecting frame, a half shaft sleeve, a balance rod, a front pull rod, a limit spring, a steering power arm and a mounting frame. Through the design, the steering device of the tractor chassis and the tractor are provided, through the design of the front pull rod, the connecting frame and the steering power arm, the front part of the chassis can be steered, meanwhile, the front wheels can be steered for the second time, and the steering angle is increased through the design; through the combination of the telescopic rod and the limiting spring, the front wheel and the connecting frame are more stable, and the front wheel and the front pull rod are prevented from shaking; 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 tractor steering device, and particularly relates to a pull rod type front steering mechanism for 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 that require fine operation, this steering system seems inadequate.

[0003] Due to the limitation of the steering angle, a tractor may encounter obstacles when performing some 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 tipping over, 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. Content 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 pull rod type front steering mechanism for a tractor chassis, characterized in that: it includes a constant velocity joint, a connecting piece, a front telescopic rod, a rear telescopic rod, a front hub, a connecting frame, a half shaft sleeve, a balance rod, a front pull rod, a limiting spring and a steering power arm;

[0007] The constant velocity joint is arranged on the front hub, the number of the constant velocity joints is two, 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 both the front telescopic rod and the rear telescopic rod is two;

[0009] Both ends of the front pull rod are respectively hinged to the connecting piece and the connecting frame, both ends of the front telescopic rod are respectively hinged to the connecting piece and the connecting frame, and a limiting spring is sleeved on the front telescopic rod;

[0010] The two rear telescopic rods are hinged to the connecting frame, and a limiting spring is sleeved on the rear telescopic rod;

[0011] The middle part of the connecting frame is hinged to the tractor chassis, and the steering power arm is hinged to the connecting frame.

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

[0013] A brake helmet is arranged on the constant velocity joint. The brake helmet is connected to a 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. The mounting bracket is hinged to the balance rod.

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

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

[0017] The steering power arm is a hydraulic cylinder. The hydraulic cylinder is connected to the tractor hydraulic pump.

[0018] The steering power arm includes a rod body and a steering gear. The rod body is connected to the steering gear, and the steering gear is connected to the tractor steering system.

[0019] The two rear telescopic rods are connected to the tractor chassis to keep the connecting frame stable.

[0020] The front telescopic rod and the rear telescopic rod are telescopic rod bodies.

[0021] The connection mode of the connecting member and the constant velocity joint is fixed connection.

[0022] Through the above design, a steering device for a tractor chassis and a tractor are provided. Through the design of the front pull rod, the connecting frame and the steering power arm, 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 wheels and the connecting frame are more stable, preventing the front wheels and the front pull rod from shaking; and by adopting the design of the brake helmet and the brake pump supporting the supercharger, the safety of the brake is enhanced; a steering device for a tractor chassis with a wide application range is provided. Description of the Drawings

[0023] The following further describes the present invention in conjunction with the drawings and specific embodiments:

[0024] Figure 1 Structural schematic of the present utility model Figure 1 ;

[0025] Figure 2 is Figure 1 Partial enlarged view of area A in

[0026] Figure 3 Structural schematic of the present utility model Figure 2 ;

[0027] In the figure: 1 - Constant velocity joint, 2 - Connecting piece, 3 - Front telescopic rod, 5 - Rear telescopic rod, 6 - Front hub, 7 - Connecting frame, 9 - Half shaft sleeve, 10 - Balance bar, 11 - Front pull rod, 12 - Limiting spring, 13 - Steering power arm, 16 - Mounting bracket. Specific embodiments

[0028] The present application will be further described in conjunction with the accompanying drawings:

[0029] A pull rod type front steering mechanism for a tractor chassis, characterized in that it includes a constant velocity joint 1, a connecting piece 2, a front telescopic rod 3, a rear telescopic rod 5, a front hub 6, a connecting frame 7, a half shaft sleeve 9, a balance bar 10, a front pull rod 11, a limiting spring 12 and a steering power arm 13;

[0030] The constant velocity joint 1 is arranged on the front 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;

[0031] The number of the telescopic rods 3 and the rear telescopic rods 5 is two each;

[0032] Both ends of the front pull rod 11 are respectively hinged to the connecting piece 2 and the connecting frame 7, both ends of the telescopic rod 3 are respectively hinged to the connecting piece 2 and the connecting frame 7, and a limiting spring 12 is sleeved on the telescopic rod 3;

[0033] The two rear telescopic rods 5 are hinged to the connecting frame 7, and a limiting spring 12 is sleeved on the rear telescopic rod 5;

[0034] The middle of the connecting frame 7 is hinged to the tractor chassis, and the steering power arm 13 is hinged to the connecting frame 7.

[0035] The connection mode between the connecting member 2 and the constant velocity joint 1 is hinged; the connecting member 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 pull rod 11.

[0036] 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.

[0037] A mounting bracket 16 is fixedly arranged at the front end of the constant velocity joint 1. The mounting bracket 16 is hinged to the balance rod 10.

[0038] Both ends of the limiting spring 12 are fixedly connected to both ends of the front telescopic rod 3 or the rear telescopic rod 5 respectively.

[0039] Cylinders are arranged at both ends of the connecting frame 7. The cylinders are used for hinging with the front telescopic rod 3 and the front pull rod 11.

[0040] The steering power arm 13 is a hydraulic cylinder. The hydraulic cylinder is connected to a tractor hydraulic pump.

[0041] The steering power arm 13 includes a rod body and a steering machine. The rod body is connected to the steering machine, and the steering machine is connected to a tractor steering system.

[0042] The two rear telescopic rods 5 are connected to a tractor chassis to keep the connecting frame 7 stable.

[0043] The front telescopic rod 3 and the rear telescopic rod 5 are telescopic rod bodies.

[0044] An annular groove is arranged on the cylinder. A circular ring matching the annular groove is arranged at the end of the telescopic rod 3;

[0045] The balance rod 10 is hinged to the ends of the two constant velocity joints 1 to keep the two constant velocity joints 1 moving synchronously;

[0046] The connection mode between the connecting member 2 and the constant velocity joint 1 is fixed connection;

[0047] The front pull rod 11 is hinged to the constant velocity joint 1 through the connecting member 2. The middle part of the connecting frame 7 is hinged to the tractor chassis, so that the connecting frame 7 can swing left and right. When the connecting frame 7 swings left and right under the action of the steering power arm 13, the front pull rod 11 will also drive the constant velocity joint 1 to rotate through the connecting member 2, and the constant velocity joint 1 drives the front wheel hub 6 to rotate, realizing the steering of the tractor.

[0048] The limit spring 12 on the front telescopic rod 3 is used to work together with the front telescopic rod 3 to limit the steering force of the ball cage 1, thereby ensuring the stability of the connection between the ball cage 1 and the connecting frame 7; the limit spring 12 on the rear telescopic rod 5 is used to ensure the stability of the connection between the tractor chassis and the connecting frame 7;

[0049] When the front telescopic rod 3 or the rear telescopic rod 5 is extended or shortened, the two ends of the limit spring 12 are fixedly connected to the two ends of the telescopic rod respectively. When the telescopic rod is extended or shortened, the limit spring 12 will be deformed accordingly.

[0050] The middle part of the connecting frame 7 is hinged to the tractor frame and the tractor chassis, and the two ends of the connecting frame 7 are connected to the rear hydraulic cylinder 5, and 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 to achieve the effect of turning left and right.

[0051] The steering angle is enlarged by the steering combination of the ball cage 1 and the front tie rod 11 and the steering combination of the connecting frame 7 and the steering power arm 13;

[0052] The ball cage 1 is provided with a brake helmet, which is connected to a brake pump, and the brake pump is equipped with a booster. The design of the brake helmet and the brake pump improves the safety of the steering system when braking during steering.

Claims

1. A pull rod type front steering mechanism for a tractor chassis, characterized in that: It comprises a ball cage (1), a connecting piece (2), a front telescopic rod (3), a rear telescopic rod (5), a front wheel hub (6), a connecting frame (7), a half-axle sleeve (9), a balancing rod (10), a front pull rod (11), a limit spring (12) and a steering power arm (13); The ball cage (1) is arranged on the front wheel hub (6), the number of the ball cages (1) is two, 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) and the number of the rear telescopic rod (5) are both two; The two ends of the front pull rod (11) are respectively hinged to the connecting piece (2) and 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 telescopic rods (5) are hingedly arranged on the connecting frame (7), and a limit spring (12) is sleeved on the rear telescopic rod (5); The middle part of the connecting frame (7) is hinged to the tractor chassis, and the steering power arm (13) is hinged to the connecting frame (7); The front telescopic rod (3) and the rear telescopic rod (5) are telescopic rod bodies.

2. The pull rod type front steering mechanism of the tractor chassis according to claim 1, characterized in that: The connection method between the connecting member (2) and the ball cage (1) is hinged; the connecting member (2) includes 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 by 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 pull rod (11).

3. The pull rod type 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 pull rod type 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 pull rod type 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 front telescopic rod (3) or the rear telescopic rod (5).

6. The pull rod type 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 front telescopic rod (3) and the front pull rod (11).

7. The pull rod type front steering mechanism of the tractor chassis according to claim 1, characterized in that: The steering power arm (13) is a hydraulic cylinder, and the hydraulic cylinder is connected to a tractor hydraulic pump.

8. The pull rod type front steering mechanism of the tractor chassis according to claim 1, characterized in that: The steering power arm (13) comprises a rod body and a steering gear, wherein the rod body is connected to the steering gear, and the steering gear is connected to a tractor steering system.

9. The pull rod type front steering mechanism of the tractor chassis according to claim 1, characterized in that: The two rear telescopic rods (5) are connected to the tractor chassis and are used to maintain the stability of the connecting frame (7).

10. The pull rod type 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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