Yoke unit, yoke unit manufacturing method, torque detection device, and electric power steering device
A technology of magnetic yokes and magnetic pole teeth, which is applied in the field of electric power steering devices, can solve the problems of reducing the accuracy of the first magnetic yoke 310, and achieve the effect of suppressing the reduction of accuracy
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no. 1 approach
[0061] by reference Figure 1 to Figure 4 (b) Describe the structure of the electric power steering device.
[0062] Such as figure 1 As shown in , the electric power steering device 1 includes: a steering angle transmission mechanism 10 , an auxiliary actuator 18 , an electronic controller 30 , a torque detector 40 , and a vehicle speed sensor 31 . The steering angle transmission 10 includes: a steering shaft 11 , a rack and pinion mechanism 15 , a tie rod 17 and a torsion bar 21 . The steering angle transmission 10 transmits the rotation of the steering wheel 2 to the steering wheels 3 . The steering shaft 11 includes a column shaft 12 , a pinion shaft 14 , and an intermediate shaft 13 . The steering wheel 2 is operated to rotate the steering shaft 11 .
[0063] The column shaft 12 includes an input shaft 12A and an output shaft 12B. The steering wheel 2 is fixed to the front end of the column shaft 12 . The pinion shaft 14 is coupled to a rack shaft 16 through a rack...
no. 2 approach
[0120] by reference Figure 15 (a) to Figure 17 A second embodiment of the present invention will be described. The second embodiment differs from the first embodiment in that the outer surface 53 of the yoke unit 50 has a concave-convex shape and the inner surface of the surrounding mold 120 and the outer surface of the groove portion 11A each have a concave-convex shape. Portions of the second embodiment corresponding to those of the first embodiment will not be described in detail.
[0121] Such as Figure 15 (a) and Figure 15 As shown in (b), the yoke unit 50 includes an inner surface 50A, an outer surface 50B, a collar 51 , a first yoke 60 and a second yoke 70 , and a resin portion 90 . The resin portion 90 includes an inner surface 91 , three concave portions 92 , and an outer surface 93 . The resin portion 90 covers the respective outer peripheries of the first magnetic pole teeth 61 and the second magnetic pole teeth 71 . The resin portion 90 is filled between ...
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