Torsion difference limited slip differential

Abstract

The invention aims to provide a differential limited slip solution for a self-walking mechanical chassis meeting all-terrain road conditions, and provides a torque difference limited slip differential which is designed based on the one-way transmission characteristic of a worm gear and a worm and achieves limited slip locking when torque difference occurs on the two sides of power output. The torsion difference limited slip differential is composed of a differential shell 1, a differential worm gear 2, a differential worm 3, a worm gear support 4, a differential gear 5, an output half shaft 6, a bearing 7, a bolt 8 and the like, and the specific assembly structure is shown in the figure 1. A turbine support (4) provided with a differential worm gear (2) and a differential case (1) provided with a differential gear (5) and a differential worm (3) on the left side and the right side are fastened through bolts (8) to form the limited slip differential mechanism, and power passes through an input gear integrated with the differential case, the turbine support fixed to the differential case and the differential worm gear installed on the turbine support, and the differential worm gear is fixed to the differential case. The torque is transmitted to an output half shaft through a differential worm meshed on the left side and the right side of a differential worm gear and a differential gear meshed on a differential worm gear so as to drive wheels, various differential mechanism working conditions occurring in the vehicle running process are completed through the characteristic that the worm gear and the worm transmit the torque in a one-way mode, and the stability of vehicle power output is guaranteed.

Description

Technical Field

[0001] This patent relates to automobiles and various powered running chassis, and in particular to a torque limited slip differential based on a worm gear as a form of power transmission. Background Art

[0002] At present, the common power of various vehicles, construction machinery, agricultural transport vehicles, etc. comes from the walking chassis equipment, and most of them use open planetary gear differentials. The characteristics of this differential can meet the requirements of balanced ground adhesion to ensure vehicle power transmission. However, when driving on complex road conditions with uneven terrain or uneven adhesion, the open differential is limited by the structure, and the drive wheel output may slip due to uneven adhesion, and the chassis has no effective power output, which seriously affects the vehicle's passing ability and driving safety. A few high-end family cars and special machinery walking chassis use LSD differentials, electronic auxiliary torque distribution systems, hydraulic auxiliary torque distribution systems and other equipment. Although they meet the needs of self-propelled chassis equipment for differentials in various complex working conditions, their structures are relatively complex, and their production and maintenance costs are extremely high, making them difficult to popularize. Summary of the invention

[0003] Description of the drawings Figure 1 , Torque limited slip differential structure diagram Figure 2 、Differential worm gear Figure 3 、Differential worm Figure 4 、Worm gear bracket Figure 5 , Differential gear In the attached figure: 1, differential case 2, differential worm wheel 3, differential worm 4, worm wheel bracket 5, differential gear 6, output half shaft 7, bearing 8, bolt The technical problem that the present invention aims to solve is to provide a differential limited slip solution for a self-propelled machinery chassis that meets all-terrain road conditions. The present invention provides a torque limited slip differential designed based on the one-way transmission characteristics of a worm gear, which realizes differential limited slip locking when a torque difference occurs on both sides of the power output.

[0004] The torque differential limited slip differential is composed of: 1. differential case 2. differential worm wheel 3. differential worm 4. worm wheel bracket 5. differential gear 6. output half shaft 7. bearing 8. bolts and other components. The specific assembly structure is shown in Figure 1. 4. Turbine bracket with 2. differential worm wheel installed and 1. differential case with 5. differential gear and 3. differential worm installed on the left and right sides are fastened with 8. bolts to form this patented limited slip differential mechanism. The power is transmitted to the output half shaft and the driving wheel through the input gear integrated with the differential case, the worm wheel bracket fixed on the differential case and the differential worm wheel installed on the worm wheel bracket, and through the differential worms meshing on the left and right sides of the differential worm wheel and the differential gear meshing on the differential worm gear.

[0005] The daily use of vehicles and power chassis can be divided into the following working conditions: 1. Straight driving condition with uniform driving wheel adhesion 2. Turning condition with uniform driving wheel adhesion 3. Uneven driving wheel adhesion. The specific working principle of the present invention in the above working conditions is as follows: 1. The driving wheel has uniform adhesion when driving in a straight line: The driving force is transmitted to the output half-shaft through the input gear integrated with the differential housing, the worm gear bracket fixed on the differential housing and the differential worm gear installed on the worm gear bracket, and then through the differential worms meshing on the left and right sides of the differential worm gear and the differential gear meshing on the differential worm gear to drive the wheels. Since the ground adhesion is uniform and the vehicle is in a straight-line driving state, the reaction forces and torques of the left and right output wheels acting on the differential worm gear through the left and right differential gears and the differential worm meshing with them are in the same and opposite directions. The worm gear structure is in a relatively static state, and the car and the power output of the chassis are stable.

[0006] 2. Turning conditions with uniform driving wheel adhesion: The driving force is transmitted to the output half-shaft through the input gear integrated with the differential housing, the worm gear bracket fixed on the differential housing and the differential worm gear installed on the worm gear bracket, and then through the differential worms meshing on the left and right sides of the differential worm gear and the differential gear meshing on the differential worm gear to drive the wheels. Since the ground adhesion is uniform and the vehicle is in a turning state, the reaction force and torque of the left and right output wheels acting on the differential worm gear through the left and right differential gears and the differential worm meshing therewith are in the same direction, and the worm gear structure is in a differential rotation state, ensuring the stability of the power output of the vehicle and the dynamic chassis and realizing turning differential driving.

[0007] 3. Uneven driving wheel adhesion conditions: The driving force is transmitted to the output half-shaft through the input gear integrated with the differential housing, the worm gear bracket fixed on the differential housing and the differential worm gear installed on the worm gear bracket, and then through the differential worms meshing on the left and right sides of the differential worm gear and the differential gear meshing on the differential worm gear to drive the wheels. Due to uneven ground adhesion, the reaction force torque of the left and right output wheels acting on the differential worm gear through the left and right differential gears and the differential worm meshing therewith is different. Limited by the unidirectional transmission characteristics of the worm gear structure, the worm gear structure is in a relatively static state, and the power output of the car and the chassis drive wheel is still stable, ensuring stable driving of the vehicle under this working condition.

Claims

1. A method comprising:

1. A torque limited slip differential consisting of a differential case 2, a differential worm wheel 3, a differential worm 4, a worm wheel bracket 5, a differential gear 6, an output half shaft 7, a bearing 8, bolts and other components.

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