tilt steering

Abstract

Construction is achieved in which a steering column 4b and a support bracket 17b are able to smoothly displace in the forward direction during a secondary collision Spring-side locking sections 40 of a bias spring 32a engage with locking tabs 41 of the support bracket 17b in a state so as to press downward on the locking tabs 41. A pressure section 35a of the bias spring 32a engages with a receiving surface of the steering column 4b in a state so as to cause an upward pressure force to act on the steering column 4b During a secondary collision, when the bias spring 32a displaces in the forward direction during the stroke through which the steering column 4b and support bracket 17b are able to displace in the forward direction and interferes with a gear housing 12 of a steering-assist apparatus 5, the locked state between the spring-side locking sections 40 and the locking tabs 41 is released, which allows the steering column 4b and the support bracket 17b to smoothly displace further in the forward direction.

Description

technical field [0001] The present invention relates to a tilt steering device including a tilt mechanism for adjusting the vertical position of a steering wheel and a shock absorbing device for protecting a driver who collides with the steering wheel in a collision accident. Background technique [0002] Such as Figure 8 As shown, the steering device is configured to transmit the movement of the steering wheel 1 to the steering gear through the steering main shaft 2, and to impart the steering angle to the left and right steering wheels 3. In addition, a tilt / telescopic steering device having a function of adjusting the front-rear position and the vertical position of the steering wheel 1 to change the positional relationship between the steering wheel 1 and the driver according to the driver's physique and driving posture is widely used. [0003] Figure 9 as well as Figure 10 The conventional tilt-telescopic steering device described in JP-A-2011-218941 is shown. Thi...

AI Technical Summary

Problems solved by technology

However, when the biasing spring 32 is used as Figure 9 as well as Figure 10 In the case of applying the support mechanism of the steering column 4 in the tilt and telescopic steering device with the impact absorbing mechanism shown, the biasing spring 32 is also engaged with both ends of the biasing spring 32 during a secondary collision. The rear support bracket 17 and the outer column 11 are displaced forward together, and the coil spring portion 33 collides with the rear end portion of the gear case 12 constituting the steering force assisting device 5 and other components arranged in front of the biasing spring 32 , and there is Prevent the possibility of further forward displacement of the biasing spring 32

[0013] When the further forward displacement of the urging spring 32 is prevented, and the rear support bracket 17 and the outer column 11 intend to further move forward, the force of the urging spring 32 to the rear support bracket 17a is not released. In the locked state, there is a possibility that the urging spring 32 is pressed between the rear end of the gear case 12 and the rear support bracket 17, thereby hindering the smooth forward displacement of the rear support bracket 17 and the outer column 11. sex

[0014] In addition, at the time of a secondary collision, even if the locking state of the urging spring 32 to the rear side support bracket 17 is released, if the rear side support bracket 17 is further displaced forward, there is a possibility that the rear side supports The bracket 17 and the coil spring portion 33 interfere in the front-rear direction and become an obstacle to the forward displacement of the rear support bracket 17a, preventing the smooth forward displacement of the rear support bracket 17 and the outer column 11.

Images