Tractor rear axle with steering structure

Abstract

The utility model provides a tractor rear axle with a steering structure, and belongs to the technical field of rear axles. Comprising a bottom plate, a driving output shaft, a brake assembly and two tail end speed reduction assemblies, the interior of the brake assembly is rotationally connected with two duplex universal joint assemblies, one sides of the tail end speed reduction assemblies are fixedly connected with the duplex universal joint assemblies, one end of one duplex universal joint assembly is fixedly connected with a first steering arm, and the other end of the other duplex universal joint assembly is fixedly connected with a second steering arm. The first steering arm is rotationally connected with a pull rod. Through the arrangement of the first steering arm, the pull rod, the oil cylinder, the second steering arm and the duplex universal joint assemblies, the piston rod of the oil cylinder extends to push one end of the second steering arm to move, and the two duplex universal joint assemblies deflect in the brake assembly and drive the tail end speed reduction assembly to rotate. By means of rear axle steering, the tractor can be more flexibly controlled in a narrow space, the operation efficiency is improved, the turning radius can be remarkably reduced, and the tractor is more stable during turning.

Description

Technical Field

[0001] The utility model relates to the technical field of rear axles, in particular to a tractor rear axle with a steering structure. Background Art

[0002] The rear axle of a tractor refers to the shaft system and other components that connect the tractor's drive wheels. The main function of the rear axle is to transfer the power output of the engine to the drive wheels of the tractor to help realize the tractor's driving and traction functions. The rear axle usually includes components such as gear sets, bearings, and drive shafts, which work together to achieve power transmission and rotation and steering functions. The rear axle also carries the torque from the ground reaction force and traction force, and transmits it to the tractor frame.

[0003] The tractor rear axle cannot rotate, which causes the tractor's turning radius to become larger and reduces the maneuverability during driving. Therefore, the present application provides a tractor rear axle with a steering structure to meet the demand. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a tractor rear axle with a steering structure to solve the problem that the tractor rear axle cannot rotate, resulting in a larger steering radius of the tractor and reduced maneuverability during driving.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0006] A tractor rear axle with a steering structure comprises a base plate, a driving output shaft, a brake assembly and two terminal reduction assemblies, wherein the brake assembly is internally rotatably connected to two double universal joint assemblies, and one side of the terminal reduction assembly is fixedly connected to the double universal joint assembly, one end of the double universal joint assembly is fixedly connected to a steering arm 1, and a pull rod is rotatably connected to the steering arm 1, an oil cylinder is rotatably connected to the base plate, and the output end of the oil cylinder is rotatably connected to a steering arm 2, one end of the pull rod is rotatably connected to one side of the steering arm 2, and one end of the steering arm 2 is fixedly connected to the top of another double universal joint assembly, a mounting plate is provided below the pull rod, and four rotating rods are rotatably connected to the mounting plate, and one side of every two rotating rods is rotatably connected to a sliding seat, and one side of the sliding seat is fixedly connected to a damping rod, and the end of the damping rod away from the output end is fixedly mounted on the pull rod.

[0007] Preferably, it is characterized in that a rubber block is fixedly mounted on the bottom of the mounting plate.

[0008] Preferably, a piston tube is fixedly mounted on one of the sliding seats, and a piston rod is fixedly mounted on the other sliding seat, and the inner wall of the piston tube is slidably connected to the outer wall of the piston rod and is sealed.

[0009] Preferably, two rubber sheets 1 are fixedly mounted on the pull rod, and a rubber sheet 2 is fixedly mounted inside the sliding seat, and one side of the rubber sheet 2 is in contact with one side of the rubber sheet 1.

[0010] Preferably, a sponge sheet is fixedly mounted on the top of the mounting plate, and the top of the sponge sheet does not contact the bottom of the pull rod.

[0011] Preferably, the edge of the mounting plate is provided with a rounded chamfer.

[0012] Preferably, a protruding strip is provided on the pull rod, and a limiting groove matching with the protruding strip is provided on the sliding seat.

[0013] Preferably, the bottom height of the sliding seat is higher than the bottom height of the mounting plate.

[0014] Compared with the prior art, the utility model has at least the following beneficial effects:

[0015] In the above scheme, by setting the steering arm one, the pull rod, the cylinder, the steering arm two and the double universal joint assembly, the cylinder piston rod is extended to push one end of the steering arm two to move, the two double universal joint assemblies are deflected inside the brake assembly and drive the terminal reduction assembly to rotate, and the rear axle steering can make the tractor more flexible in a small space, improve the working efficiency, and can significantly reduce the turning radius, so that the tractor is more stable when turning.

[0016] By setting the damping rod, the kinetic energy of the sliding seat during movement can be absorbed, so that the movement of the sliding seat is subject to resistance, so that the deflection of the rotating rod and the movement of the mounting plate are both subject to resistance, which has a buffering effect when the stone collides with the bottom of the rubber block, avoiding the stone from directly colliding with the bottom plate and causing damage to it, and protecting the bottom of the pull rod.

[0017] By setting the piston tube and the piston rod, since the part connecting the piston rod and the piston tube is sealed, the internal gas volume of the piston tube is constant. When the piston tube and the piston rod are pulled apart, the air pressure inside the piston tube will provide a force opposite to the movement direction of the piston rod, thereby providing resistance to the relative movement of the piston tube and the piston rod, and indirectly providing resistance to the movement of the sliding seat.

[0018] By setting rubber sheet one and rubber sheet two, when the sliding seat moves on the surface of the pull rod, rubber sheet one and rubber sheet two are relatively displaced. Since the friction force at the contact part between rubber sheet one and rubber sheet two is relatively large, the resistance encountered by rubber sheet one and rubber sheet two during movement is relatively large, which indirectly hinders the movement of the sliding seat on the pull rod and reduces the upward movement amplitude of the rubber block when it is impacted by a stone. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0020] Figure 1 It is a schematic diagram of the bottom structure of the rear axle of a tractor with a steering structure;

[0021] Figure 2 It is a schematic diagram of the structure of the second steering arm and double universal joint assembly of the rear axle of a tractor with a steering structure;

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the mounting plate and the pull rod;

[0023] Figure 4 Schematic diagram of the internal structure of the piston tube;

[0024] Figure 5 It is a schematic diagram of the three-dimensional structure of the rubber sheet 1 and the rubber sheet 2;

[0025] Figure 6 Schematic diagram of the structure of the mounting plate and the pull rod.

[0026] [reference numerals]

[0027] 1. Drive output shaft; 2. Brake assembly; 3. Terminal reduction assembly; 4. Steering arm 1; 5. Pull rod; 6. Cylinder; 7. Steering arm 2; 8. Double universal joint assembly; 9. Mounting plate; 10. Rubber block; 11. Rotating rod; 12. Sliding seat; 13. Damping rod; 14. Piston tube; 15. Piston rod; 16. Rubber sheet 1; 17. Rubber sheet 2; 18. Sponge sheet; 19. Bottom plate.

[0028] As shown in the figure, in order to clearly implement the structure of the embodiment of the utility model, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the utility model to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0029] The following is a detailed description of a tractor rear axle with a steering structure provided by the utility model in combination with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternatives to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments, and are not intended to specifically limit the utility model.

[0030] It should be noted that the embodiments indicated by "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" etc. in the specification may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it should be within the knowledge of technicians in the relevant field whether or not such features, structures or characteristics are explicitly described in conjunction with other embodiments.

[0031] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0032] like Figure 1 and Figure 2As shown, the embodiment of the utility model provides a tractor rear axle with a steering structure, including a base plate 19, a drive output shaft 1, a brake assembly 2 and two terminal reduction assemblies 3, the brake assembly 2 is internally rotatably connected to two double universal joint assemblies 8, and one side of the terminal reduction assembly 3 is fixedly connected to the double universal joint assembly 8, one end of a double universal joint assembly 8 is fixedly connected to a steering arm 1 4, the steering arm 1 4 is rotatably connected to a pull rod 5, the base plate 19 is rotatably connected to an oil cylinder 6, the output end of the oil cylinder 6 is rotatably connected to a steering arm 2 7, one end of the pull rod 5 is rotatably connected to a side of the steering arm 2 7, and one end of the steering arm 2 7 is fixedly connected to the top of another double universal joint assembly 8. When the tractor rear axle needs to rotate, the oil cylinder 6 is first started. The piston rod of the oil cylinder 6 extends and pushes one end of the steering arm 2 7 to move. The steering arm 2 7 moves in a circle around the double universal joint assembly 8, and one end of the oil cylinder 6 rotates on the bottom plate 19. When the steering arm 2 7 rotates, it drives one end of the pull rod 5 to move. The pull rod 5 drives the steering arm 1 4 to move in a circle around the double universal joint assembly 8. The two double universal joint assemblies 8 deflect inside the brake assembly 2 and drive the terminal reduction assembly 3 to rotate, thereby realizing the rotation of the terminal reduction assembly 3. The terminal reduction assembly 3 is connected with a tire, thereby realizing the steering of the rear axle of the tractor. By arranging the steering arm 1 4, the pull rod 5, the oil cylinder 6, the steering arm 2 7 and the double universal joint assembly 8, the rear axle steering can make the tractor more flexible in operation in a small space, improve the working efficiency, and can significantly reduce the weight of the tractor. A small turning radius makes the tractor more stable when turning. A mounting plate 9 is provided below the pull rod 5. Four rotating rods 11 are rotatably connected to the mounting plate 9. One side of each two rotating rods 11 is rotatably connected to a sliding seat 12. A damping rod 13 is fixedly connected to one side of the sliding seat 12. The end of the damping rod 13 away from the output end is fixedly installed on the pull rod 5. A rubber block 10 is fixedly installed at the bottom of the mounting plate 9. The edge of the mounting plate 9 is provided with a circular chamfer. When the tractor moves, stones on the road surface collide with the rubber block 10 and push it upward. The rubber block 10 drives the mounting plate 9 to move upward. The rubber block 10 is elastic. The mounting plate 9 drives one end of the rotating rod 11 to deflect, so that the rotating rod 11 gradually tends to be horizontal, and the rotating rod 11 pushes the sliding seat 1 2 are away from each other, and the sliding seat 12 squeezes the damping rod 13. By setting the damping rod 13, the kinetic energy of the sliding seat 12 when it moves can be absorbed, so that the movement of the sliding seat 12 is resisted, so that the deflection of the rotating rod 11 and the movement of the mounting plate 9 are resisted, which has a buffering effect when the stone hits the bottom of the rubber block 10, avoiding the stone directly hitting the bottom plate 19 and causing damage to it, and protecting the bottom of the pull rod 5. A sponge sheet 18 is fixedly installed on the top of the mounting plate 9, and the top of the sponge sheet 18 does not contact the bottom of the pull rod 5. When the stone hits the rubber block 10 and moves upward, the mounting plate 9 drives the sponge sheet 18 to move upward. When the sponge sheet 18 contacts the outer wall of the pull rod 5 and is deformed, due to the soft material of the sponge sheet 18,To avoid damage to the pull rod 5, a raised strip is provided on the pull rod 5, and a limiting groove matching the raised strip is provided on the sliding seat 12. The bottom height of the sliding seat 12 is higher than the bottom height of the mounting plate 9. When the sliding seat 12 slides on the outer wall of the pull rod 5, the limiting groove slides along the raised strip, so that the sliding seat 12 and the pull rod 5 can only slide along the axis direction of the pull rod 5.

[0033] like Figure 4 , Figure 5 and Figure 6 As shown, a piston tube 14 is fixedly mounted on one sliding seat 12, and a piston rod 15 is fixedly mounted on the other sliding seat 12. The inner wall of the piston tube 14 is slidably connected to the outer wall of the piston rod 15 and is sealed. When the bottom of the rubber block 10 is hit, the two sliding seats 12 move away from each other, thereby driving the piston rod 15 to slide inside the piston tube 14. By arranging the piston tube 14 and the piston rod 15, since the part where the piston rod 15 is connected to the piston tube 14 is sealed, the internal gas volume of the piston tube 14 is constant. When the piston tube 14 and the piston rod 15 are pulled apart, the air pressure inside the piston tube 14 will provide a force opposite to the moving direction of the piston rod 15, thereby affecting the relative movement of the piston tube 14 and the piston rod 15. To provide resistance, indirectly provide resistance to the movement of the sliding seat 12, two rubber sheets 16 are fixedly installed on the pull rod 5, and a rubber sheet 2 17 is fixedly installed inside the sliding seat 12, and one side of the rubber sheet 2 17 is in contact with the other side of the rubber sheet 16. By arranging the rubber sheets 16 and the rubber sheets 2 17, when the sliding seat 12 moves on the surface of the pull rod 5, the rubber sheets 16 and the rubber sheets 2 17 are relatively displaced. Since the friction force at the contact part between the rubber sheets 16 and the rubber sheets 2 17 is relatively large, the resistance encountered by the rubber sheets 16 and the rubber sheets 2 17 during the movement is relatively large, which indirectly hinders the movement of the sliding seat 12 on the pull rod 5 and reduces the amplitude of the upward movement of the rubber block 10 when it is impacted by a stone.

[0034] The technical solution provided by the utility model is that when the rear axle of the tractor needs to rotate, the oil cylinder 6 is first started, and the piston rod of the oil cylinder 6 is extended to push one end of the steering arm 2 7 to move, and the steering arm 2 7 moves in a circle around the double universal joint assembly 8, and one end of the oil cylinder 6 rotates on the bottom plate 19, and when the steering arm 2 7 rotates, it drives one end of the pull rod 5 to move, and the pull rod 5 drives the steering arm 1 4 to move in a circle around the double universal joint assembly 8, and the two double universal joint assemblies 8 deflect inside the brake assembly 2 and drive the terminal reduction assembly 3 to rotate, thereby realizing the rotation of the terminal reduction assembly 3, and the terminal reduction assembly 3 is fixedly connected with a tire, thereby realizing the steering of the rear axle of the tractor, when the tractor moves, stones on the road surface collide with the rubber block 10 and push it upward, and the rubber block 10 drives the mounting plate 9 to move upward, and the sponge sheet 18 contacts the outer wall of the pull rod 5 to produce deformation, and the rubber block 10 has elasticity, and the mounting plate 9 drives the rotation One end of the rod 11 is deflected, so that the rotating rod 11 gradually tends to be horizontal, and the rotating rod 11 pushes the sliding seats 12 away from each other. When the sliding seat 12 slides on the outer wall of the pull rod 5, the limiting groove slides along the raised strip, and the sliding seat 12 drives the piston rod 15 to slide inside the piston tube 14. The air pressure inside the piston tube 14 will provide a force opposite to the movement direction of the piston rod 15, and the rubber sheet 16 and the rubber sheet 2 17 are relatively displaced. Since the friction force at the contact part between the rubber sheet 16 and the rubber sheet 2 17 is large, the resistance encountered by the rubber sheet 16 and the rubber sheet 2 17 during the movement is large, and the sliding seat 12 squeezes the damping rod 13. The damping rod 13 can absorb the kinetic energy of the sliding seat 12 during its movement, so that the movement of the sliding seat 12 is resisted, so that the deflection of the rotating rod 11 and the movement of the mounting plate 9 are both resisted, which can provide a buffer when the stone hits the bottom of the rubber block 10.

[0035] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, the specific details are described in detail in the above preferred embodiments of the present invention, and those skilled in the art can fully understand the present invention without the description of these details.

[0036] The above are only preferred implementations of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A tractor rear axle with a steering structure, comprising a base plate (19), a drive output shaft (1), a brake assembly (2), and two terminal reduction assemblies (3), characterized in that: The brake assembly (2) is internally rotatably connected to two double universal joint assemblies (8), and one side of the end reduction assembly (3) is fixedly connected to the double universal joint assembly (8). One end of the double universal joint assembly (8) is fixedly connected to a steering arm 1 (4), and a pull rod (5) is rotatably connected to the steering arm 1 (4). The bottom plate (19) is rotatably connected to an oil cylinder (6), and the output end of the oil cylinder (6) is rotatably connected to a steering arm 2 (7). One end of the pull rod (5) is rotatably connected to the steering arm 2 (7). 7), one end of the steering arm 2 (7) is fixedly connected to the top of another double universal joint assembly (8), a mounting plate (9) is arranged below the pull rod (5), four rotating rods (11) are rotatably connected to the mounting plate (9), one side of each two rotating rods (11) is rotatably connected to a sliding seat (12), one side of the sliding seat (12) is fixedly connected to a damping rod (13), and one end of the damping rod (13) away from the output end is fixedly mounted on the pull rod (5).

2. The tractor rear axle with a steering structure according to claim 1, characterized in that: A rubber block (10) is fixedly mounted on the bottom of the mounting plate (9).

3. The tractor rear axle with a steering structure according to claim 1, characterized in that: A piston tube (14) is fixedly mounted on one of the sliding seats (12), and a piston rod (15) is fixedly mounted on the other sliding seat (12). The inner wall of the piston tube (14) and the outer wall of the piston rod (15) are slidably connected and sealed.

4. The tractor rear axle with a steering structure according to claim 1, characterized in that: Two rubber sheets (16) are fixedly mounted on the pull rod (5), and a rubber sheet (17) is fixedly mounted inside the sliding seat (12), and one side of the rubber sheet (17) is in contact with one side of the rubber sheet (16).

5. The tractor rear axle with a steering structure according to claim 1, characterized in that: A sponge sheet (18) is fixedly mounted on the top of the mounting plate (9), and the top of the sponge sheet (18) does not contact the bottom of the pull rod (5).

6. The tractor rear axle with a steering structure according to claim 1, characterized in that: The edge of the mounting plate (9) is provided with a circular chamfer.

7. The tractor rear axle with a steering structure according to claim 1, characterized in that: The pull rod (5) is provided with a raised strip, and the sliding seat (12) is provided with a limiting groove matched with the raised strip.

8. The tractor rear axle with a steering structure according to claim 1, characterized in that: The bottom height of the sliding seat (12) is higher than the bottom height of the mounting plate (9).

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