A high performance drive front axle for a high horsepower wheeled tractor

Abstract

This utility model belongs to the field of agricultural machinery technology and discloses a high-performance drive front axle for high-horsepower wheeled tractors. It includes an axle housing, with a Torsen differential connected to the inner end of the central part of the axle housing. Steering knuckle assemblies are connected to both ends of the axle housing, with wheel hub assemblies connected to the outer ends of the steering knuckle assemblies. A hydraulic cylinder assembly is connected to the outer end of the central part of the axle housing, and each pair of steering knuckle assemblies is connected to the hydraulic cylinder assembly. This solution achieves a comprehensive improvement in the load-bearing capacity, torque distribution efficiency, steering accuracy, and sealing reliability of the drive front axle by integrating a Torsen differential inside the axle housing, optimizing the high-strength structural design of the axle housing and steering knuckle assemblies, using an integrated forged tie rod and an extra-large ball joint hydraulic cylinder assembly, and configuring high-temperature resistant seals at the connection points. This effectively meets the heavy-load operation requirements of high-horsepower wheeled tractors under complex working conditions, significantly extends the service life of the front axle, reduces the failure rate, and improves the stability and operating efficiency of the entire machine's power system.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a high-performance drive front axle for high-horsepower wheeled tractors. Background Technology

[0002] High-horsepower wheeled tractors are the main power equipment in agricultural production and engineering operations. They are widely used in various complex working conditions such as tillage, deep loosening, transportation, and heavy-duty operations. As the core component of the tractor chassis system, the drive front axle undertakes multiple functions, including transmitting the engine output torque to the front wheels, supporting the front load, and realizing steering. Its structure usually includes axle housing, main reducer, differential, steering knuckle, wheel hub, and hydraulic power steering device. The load-bearing capacity, transmission efficiency, and sealing reliability of the front axle directly affect the overall working performance and service life of the machine.

[0003] Currently, the drive front axles used in high-horsepower tractors have low performance. Firstly, due to insufficient load-bearing capacity, they are prone to fatigue under various complex terrain conditions, leading to structural damage to the front axle and accelerated gear wear due to uneven load. Secondly, the use of friction plate differentials can easily result in insufficient traction and ineffective power distribution. The low performance of gear materials makes them extremely prone to damage under harsh working conditions. Poor sealing performance leads to insufficient lubrication, causing gear wear and power loss. Utility Model Content

[0004] This invention aims to provide a high-performance drive front axle for high-horsepower wheeled tractors to solve the problems mentioned in the background art. This solution integrates a Torsen differential inside the axle housing, optimizes the high-strength structural design of the axle housing and steering knuckle assembly, adopts an integrated forged tie rod and an extra-large ball joint hydraulic cylinder assembly, and configures high-temperature resistant seals at the connection points. This achieves a comprehensive improvement in the load-bearing capacity, torque distribution efficiency, steering accuracy, and sealing reliability of the drive front axle, effectively meeting the heavy-load operation requirements of high-horsepower wheeled tractors under complex working conditions, significantly extending the service life of the front axle, reducing the failure rate, and improving the stability and operating efficiency of the entire machine's power system.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A high-performance drive front axle for a high-horsepower wheeled tractor includes an axle housing. A Torsen differential is connected to the inner end of the central portion of the axle housing, and steering knuckle assemblies are connected to both ends of the axle housing. Wheel hub assemblies are connected to the outer ends of the steering knuckle assemblies, and hydraulic cylinder assemblies are connected to the outer ends of the central portion of the axle housing. Each pair of steering knuckle assemblies is connected to a hydraulic cylinder assembly. High-temperature resistant seals are provided at the joints of the axle housing, steering knuckle assemblies, and wheel hub assemblies.

[0007] Preferably, the bridge housing is made of high-strength ductile iron.

[0008] Preferably, the steering knuckle assembly is forged from high-strength alloy steel, and the surface of the steering knuckle assembly is subjected to carburizing and quenching treatment.

[0009] Preferably, the Torsen differential employs a worm gear self-locking structure.

[0010] Preferably, the hydraulic cylinder assembly is connected to a pair of steering knuckle assemblies via an integrally forged tie rod, wherein the ball head of the tie rod is made of an integrally forged alloy steel rod body and adopts an extra-large ball pin structure.

[0011] Preferably, the seals at the connection between the axle housing, steering knuckle assembly, and wheel hub assembly are made of hydrogenated nitrile rubber, and the lips of the seals are reinforced with corrosion-resistant and wear-resistant materials.

[0012] The beneficial effects of this technical solution compared to existing technologies are as follows:

[0013] This solution achieves a comprehensive improvement in the load-bearing capacity, torque distribution efficiency, steering accuracy, and sealing reliability of the front axle by integrating a Torsen differential inside the axle housing, optimizing the high-strength structural design of the axle housing and steering knuckle assembly, adopting an integrated forged tie rod and an extra-large ball joint hydraulic cylinder assembly, and configuring high-temperature resistant seals at the connection points. It effectively meets the heavy-load operation requirements of high-horsepower wheeled tractors under complex working conditions, significantly extends the service life of the front axle, reduces the failure rate, and improves the stability and operating efficiency of the entire machine's power system. Attached Figure Description

[0014] Figure 1 A schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a structural schematic diagram of the present invention.

[0016] Reference numerals: 1. Torsen differential; 2. Axle housing; 3. Steering knuckle assembly; 4. Hydraulic cylinder assembly; 5. Wheel hub assembly. Detailed Implementation

[0017] Currently, the drive front axles used in high-horsepower tractors have low performance. Firstly, due to insufficient load-bearing capacity, they are prone to fatigue under various complex terrain conditions, leading to structural damage to the front axle and accelerated gear wear due to uneven load. Secondly, the use of friction plate differentials can easily result in insufficient traction and ineffective power distribution. The low performance of gear materials makes them extremely prone to damage under harsh working conditions. Poor sealing performance leads to insufficient lubrication, causing gear wear and power loss.

[0018] To address the aforementioned shortcomings, this utility model provides a high-performance drive front axle with higher structural strength, better torque distribution efficiency, and more reliable sealing performance. This axle meets the stable operation requirements of high-horsepower wheeled tractors in complex working conditions such as mud, slopes, and soft soil, while also extending the service life of the front axle, reducing the failure rate, and improving the overall reliability and operating efficiency of the entire machine's power system.

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0020] like Figure 1-2 The high-performance drive front axle shown is for a high-horsepower wheeled tractor. It includes an axle housing 2. A Torsen differential 1 is connected to the inner end of the central part of the axle housing 2. Steering knuckle assemblies 3 are connected to both ends of the axle housing 2. A wheel hub assembly 5 is connected to the outer end of the steering knuckle assembly 3. A hydraulic cylinder assembly 4 is connected to the outer end of the central part of the axle housing 2. Both steering knuckle assemblies 3 are connected to the hydraulic cylinder assembly 4. High-temperature resistant seals are provided at the connection points of the axle housing 2, the steering knuckle assembly 3 and the wheel hub assembly 5.

[0021] In this embodiment, the overall design of the high-performance drive front axle aims to solve the problems of insufficient load-bearing capacity, inefficient torque distribution, and poor sealing reliability of existing front axles. The Torsen differential 1 integrated inside the axle housing 2 enables dynamic adaptive torque distribution between the wheels on both sides of the front axle, effectively improving traction under complex working conditions. The high-strength structural design of the axle housing 2 and the steering knuckle assembly 3 ensures the strength and stability of the entire axle under heavy loads for long-term use. The linkage structure between the hydraulic cylinder assembly 4 and a pair of steering knuckle assemblies 3 ensures the accuracy and stability of steering response. The configuration of high-temperature resistant seals effectively prevents lubricating oil leakage and maintains good lubrication of the gear system. The coordinated work of all parts of the overall structure enables the drive front axle to achieve comprehensive improvement in load-bearing, transmission, steering, and sealing performance.

[0022] Bridge housing 2 is made of high-strength ductile iron.

[0023] In this embodiment, the axle housing 2, as the main load-bearing structure of the drive front axle, improves its load-bearing strength and fatigue resistance through the use of high-strength ductile iron, effectively resisting the bending and torsional stresses caused by the tractor's long-term heavy-load operation. This design ensures that the axle housing 2 will not develop structural cracks or deformation due to repeated impact loads in rugged, muddy, and other complex terrains, thereby extending the service life of the entire axle. The stability of the axle housing 2 also provides reliable support for the precise installation of the Torsen differential 1, steering knuckle assembly 3, and hydraulic cylinder assembly 4, making the coordinated operation of each component smoother.

[0024] The steering knuckle assembly 3 is forged from high-strength alloy steel, and the surface of the steering knuckle assembly 3 has been carburized and quenched.

[0025] In this embodiment, the steering knuckle assembly 3, as a key steering connection component of the front axle, is forged from high-strength alloy steel to improve its tensile and torsional strength, ensuring it is not easily broken when subjected to steering loads and ground impacts. Carburizing and quenching further enhances its surface hardness and wear resistance, effectively preventing wear or failure of the steering knuckle assembly 3 due to friction during long-term use. This structural design not only improves steering reliability but also complements the high-strength characteristics of the axle housing 2, forming a robust and resilient integrated front axle structure.

[0026] The Torsen differential 1 uses a worm gear self-locking structure.

[0027] In this embodiment, the Torsen differential 1 serves as the core transmission mechanism for driving the front axle. Through a worm gear self-locking structure, it achieves automatic torque sensing and distribution between the wheels on both sides of the front axle. When one wheel slips, it can quickly transfer most of the torque to the wheel with higher traction, improving the vehicle's passability and traction in complex road conditions such as mud, slopes, and soft soil. Combined with the structure of the axle housing 2 and the steering knuckle assembly 3, the Torsen differential 1 can reduce structural stress concentration caused by torque impact while ensuring smooth power output.

[0028] The hydraulic cylinder assembly 4 is connected to a pair of steering knuckle assemblies 3 via a one-piece forged tie rod. The ball joint of the tie rod is made of one-piece forged alloy steel and adopts an extra-large ball pin structure.

[0029] In this embodiment, the hydraulic cylinder assembly 4 is connected to a pair of steering knuckle assemblies 3 via an integrally forged tie rod, realizing the synchronous movement of the steering knuckle assemblies 3 on both sides of the front axle, ensuring smooth steering action and sensitive response; the oversized ball joint structure enhances the impact resistance of the tie rod, preventing the ball joint from loosening or failing due to high-frequency vibration or lateral impact in rough road conditions, significantly improving the reliability and durability of the steering system; the stable operation of the hydraulic cylinder assembly 4 also enables the Torsen differential 1 to maintain a continuous power distribution state during steering.

[0030] The seals at the connection points of the axle housing 2, steering knuckle assembly 3, and wheel hub assembly 5 are made of hydrogenated nitrile rubber, and the lips of the seals are reinforced with corrosion-resistant and wear-resistant materials.

[0031] In this embodiment, the seal is made of hydrogenated nitrile rubber, which has excellent high and low temperature resistance and can maintain good elasticity and sealing effect in environments ranging from -40℃ to 180℃. After the lip structure is optimized, the wear resistance and corrosion resistance of the seal are further enhanced under harsh working conditions such as mud, water, and gravel, effectively preventing lubricating oil leakage, keeping the internal gears of Torsen differential 1 and wheel hub assembly 5 in an ideal lubrication state, and extending their service life. The improvement of the seal greatly improves the overall sealing performance of the drive front axle, forming a linkage protection with the strength characteristics of axle housing 2, steering knuckle assembly 3 and wheel hub assembly 5.

[0032] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-performance drive front axle for high-horsepower wheeled tractors, characterized in that: The axle housing (2) includes a Torsen differential (1) connected to the inner end of the central part of the axle housing (2), and a steering knuckle assembly (3) connected to both ends of the axle housing (2). A wheel hub assembly (5) is connected to the outer end of the steering knuckle assembly (3), and a hydraulic cylinder assembly (4) is connected to the outer end of the central part of the axle housing (2). Both steering knuckle assemblies (3) are connected to the hydraulic cylinder assembly (4). High-temperature resistant seals are provided at the connection points of the axle housing (2), the steering knuckle assembly (3) and the wheel hub assembly (5).

2. The high-performance drive front axle for a high-horsepower wheeled tractor as described in claim 1, characterized in that: The bridge shell (2) is made of high-strength ductile iron.

3. The high-performance drive front axle for a high-horsepower wheeled tractor as described in claim 1, characterized in that: The steering knuckle assembly (3) is forged from high-strength alloy steel, and the surface of the steering knuckle assembly (3) is subjected to carburizing and quenching treatment.

4. The high-performance drive front axle for a high-horsepower wheeled tractor as described in claim 1, characterized in that: The Torsen differential (1) adopts a worm gear self-locking structure.

5. The high-performance drive front axle for a high-horsepower wheeled tractor as described in claim 1, characterized in that: The hydraulic cylinder assembly (4) is connected to a pair of steering knuckle assemblies (3) via an integral forged tie rod. The ball head of the tie rod is made of integral forged alloy steel and adopts an extra-large ball pin structure.

6. The high-performance drive front axle for a high-horsepower wheeled tractor as described in claim 1, characterized in that: The seals at the connection of the axle housing (2), steering knuckle assembly (3) and wheel hub assembly (5) are made of hydrogenated nitrile rubber, and the lips of the seals are made of corrosion-resistant and wear-resistant materials.

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