Electric power steering device
An electric power steering and steering shaft technology, which is applied to power steering mechanism, electric steering mechanism, automatic steering control components, etc., can solve the problem that the bending moment cannot be offset, the accuracy of the magnetostrictive torque sensor is reduced, and the steering torque detection accuracy Lowering and other issues to achieve the effect of improving steering feel
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Embodiment 1
[0045] based on figure 1 The structure of a column-assisted electric power steering device equipped with the rotation torque detection device of the first embodiment will be described.
[0046] Such as figure 1 As shown, the steering column-assisted electric power steering device 10 (hereinafter referred to as "electric power steering device 10".) includes a steering system 20 from the steering wheel 21 of the vehicle to the steering wheels 29, 29 (for example, front wheels) of the vehicle and steering The steering system 20 applies an assist torque mechanism 40 to assist torque.
[0047] In the steering system 20, a pinion shaft 24 is connected to the steering wheel 21 via a steering shaft 22 (shaft 22) and universal joints 23, 23, and a rack and pinion shaft 24 is connected to the pinion shaft 24 via a rack and pinion mechanism 25 The shaft 26 is connected to left and right steered wheels 29 and 29 via left and right tie rods 27 and 27 and knuckles 28 and 28 at both ends of the r...
Embodiment 2
[0088] Next, the second embodiment of the present invention will be described based on the drawings.
[0089] Figure 5 (a) shows the cross-sectional structure of an electric power steering device equipped with the rotation torque detection device of the second embodiment. figure 2 Represented accordingly. Compared with the electric power steering device of the first embodiment, the number of bearings arranged at one location is changed.
[0090] Such as Figure 5 As shown in (a), in the electric power steering device 10A of the second embodiment, the first bearings 64A and 64A are composed of a plurality of single row rolling bearings continuously mounted along the steering shaft 22. In the electric power steering device 10B formed in this way, the effects prescribed by the present invention can also be obtained.
[0091] Also refer to Figure 5 (b) There are a plurality of first bearings 64A, 64A arranged. As a result, the amount of deflection of the steering shaft 22 with respe...
Embodiment 3
[0093] Next, the third embodiment of the present invention will be described based on the drawings.
[0094] Image 6 (a) shows the cross-sectional structure of an electric power steering device equipped with the rotation torque detection device of Example 3, which is similar to the above figure 2 Represented accordingly. Compared with the electric power steering system of the first embodiment, the number of bearings arranged at one location is changed.
[0095] Such as Image 6 As shown in (a), in the electric power steering apparatus 10B of the third embodiment, the second bearings 65B and 65B are composed of a plurality of single row rolling bearings continuously mounted along the steering shaft 22. In the electric power steering device 10B formed in this way, the effects prescribed by the present invention can also be obtained.
[0096] Also refer to Image 6 (b) A plurality of second bearings 65B and 65B are arranged. As a result, the amount of deflection of the steering shaf...
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Abstract
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