Steering angle transmission ratio adjustable steering system

A steering angle and steering gear technology, applied in mechanical steering gear and other directions, can solve problems such as the difficulty of rack processing, and achieve the effect of sensitive steering and stability.

Active Publication Date: 2011-11-16
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Now there is also a steering gear with variable transmission ratio. The principle is to realize different steering angles with different steering angle transmission ratios by processing teeth with variable modulus on the rack. However, the processing technology of this rack is relatively Difficult. In addition, the steering gear equipped with a variable modulus rack only realizes that the vehicle has different steering angle transmission ratios under different wheel angle conditions (such as when the wheel angle is small—that is, when it is close to the straight-line driving condition of the vehicle, the steering The angular transmission is relatively large to ensure the stability of straight-line driving. When the wheel angle is large, the steering angle transmission is relatively small, so this steering gear does not fundamentally solve the requirements of the vehicle's low-speed steering sensitivity and high-speed driving stability.

Method used

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  • Steering angle transmission ratio adjustable steering system
  • Steering angle transmission ratio adjustable steering system
  • Steering angle transmission ratio adjustable steering system

Examples

Experimental program
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Effect test

specific Embodiment 1

[0022] Specific embodiment one, such as figure 1 As shown, it is a schematic diagram of a mechanical roller type stepless angular transmission ratio adjustment mechanism. The driving disc 1 is connected to the peripheral end of the lower shaft of the steering column through the input shaft, and the driven disc 2 is connected to the input shaft of the steering gear through the output shaft. . The input shaft, the driving disc 1, the driven disc 2 and the output shaft are installed along the same central axis 16, and the driving disc 1 and the driven disc 2 are equal in size. In order to make the driving disc 1 and the driven disc 2 coaxial and ensure the stability of rotation, the shaft of the driven disc 2 is inserted into the shaft core of the driving disc 1 and can rotate freely, or the shaft of the driven disc 2 is sleeved on the driving disc 1 off-axis and free to rotate. Annular grooves 101, 201 are respectively formed on opposite sides of the driving disk 1 and the dri...

specific Embodiment 2

[0026] Embodiment 2. The angular transmission ratio adjustment mechanism includes a driving disc and a driven disc. The driving disc is connected to the lower shaft peripheral end of the steering column through the input shaft, and the driven disc is connected to the input shaft of the steering gear through the output shaft. The driving disk is a disk with the same diameter, and the driven disk includes three kinds of transmission disks whose diameter is larger, equal to or smaller than the diameter of the driving disk. Using the principle of the gearbox, the control device controls one of the driven disks with three diameters to pass through the driving disk. Gear meshing or belt driving to achieve an adjustable transmission ratio.

Embodiment 2

[0027] The control device in the second embodiment can also be just a simple control, and three button switches can be set on the automobile operation panel, respectively, the transmission ratio is greater than 1, equal to 1 and less than 1, respectively for the steering system at low speeds. Small angular transmission ratio, normal angular transmission ratio and high angular transmission ratio of the steering system at high speed. When one of the three switches is pressed, the switch generates a level signal to the control device, which controls the angular transmission ratio adjustment mechanism to provide the corresponding transmission ratio. The transmission ratio of the angular transmission ratio adjusting mechanism in this way is not steplessly adjustable.

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Abstract

This invention discloses a turning system with adjustable drive ratio of the turning angle including a turning pipe column driving the steering wheel to rotate and a turning device controlling angles of wheels, in which, an angle drive ratio adjustment unit is set between the turning pipe column and the redirector, the system also includes a control device used in controlling the angle drive ratio greater than 1 at low speed and less than 1 at high speed, which realizes the requirement of sensitive turning at low speed and stability at high speed, and controls the angle drive ratio of the turning system stepless-adjustable according to real time speed signals and rev signals of the engine.

Description

【Technical field】 [0001] The invention relates to a steering system of an automobile, in particular to a steering system capable of adjusting the angular transmission ratio of the steering system to realize optimal control of the vehicle. 【Background technique】 [0002] The steering system is an important part of the chassis system of the car. Its function is to control the wheels to rotate at a certain angular transmission ratio according to the rotation of the steering wheel, thereby controlling the steering of the vehicle. Therefore, the steering system is related to the handling stability of the vehicle and the safety of driving. [0003] The angular transmission ratio of most existing steering systems is not adjustable, that is, after the design of the steering system is completed, the steering angular transmission ratio is also fixed. With the continuous progress and development of modern automobile technology, such a steering system can no longer meet the requirement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D3/02
Inventor 艾凤杰丁运君张新貌
Owner BYD CO LTD
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