Electric machine for electric power steering gear

Abstract

A motor for use with a motorized power steering apparatus is provided in which the number of component members can be reduced, and workability in assembling the component members can be improved, while enabling miniaturization of the entire motor. The motor includes a bottomed cylindrical frame (31), a bracket (32) fixedly secured to the frame (31), a rotating element (8) having a shaft (7) rotatably supported by a frame side bearing (110) fixedly mounted on the frame (31) and a bracket side bearing (100) fixedly mounted on the bracket (32), a stationary element (6) fixedly attached to the frame (31) around an outer periphery of the rotating element (8) and having a stator winding (18) wound therearound, a rotation sensor (15) provided on the bracket (32) at a housing side of the bracket side bearing (100), and a plurality of sensor signal wires (38) for supplying and receiving signals to and from the rotation sensor (15).

Description

technical field [0001] The present invention relates to an electric power steering motor (hereinafter referred to as "motor") that enhances steering force of a vehicle. Background technique [0002] Figure 9 Represents the perspective view of the motor 2 located near the axle 1, such as Figure 10 As shown, the worm wheel 4 meshes with the worm 3 connected to the motor 2 . The worm screw 3 and the worm gear 4 that transmit the steering force to the steering wheel are contained in the housing 60, and the O-ring is used to ensure the sealing between the motor 2 and the housing 60 . [0003] Figure 11 is a side sectional view of a conventional motor 2, and Fig. 12 is Figure 11 An exploded view of Motor 2. The motor 2 is provided with: a cylindrical frame 5, a stator 6 fixed on the frame 5, a rotor 8 composed of a rotating shaft 7 and cylindrical magnets forming N magnetic poles and S magnetic poles, mounted on one side of the frame 5 and The front bracket 9 whose center...

AI Technical Summary

Problems solved by technology

[0008] The outer periphery of the conventional motor 2 is composed of the rear bracket 12 for fixing the rotation sensor 15, the frame 5 for fixing the stator 6, the front bracket 9 for fixing the load-side bearing 10, and the waterproof cover 16. There are many components, so there are gaps between the components. The assembly process and the problem that there are many O-rings 27, 28, 29 between the components

[0009] In addition, the terminals 21 on the stator side of the terminal block 14 extend radially, and there is a problem that the radial dimension of the motor 2 is large.

[0010] In addition, since each terminal 21 on the stator side is in the form of a thin plate, when the phase conductors 23 are directly connected to each terminal 21 on the stator side by welding or the like, there is a problem that the connection operation space is narrow and the connection is difficult.

[0011] In addition, a plurality of sensor signal wires 24 need to pass through the grommet 25 respectively, and the working efficiency is low.

[0012] Additionally, if Figure 13 As shown, the grommet 25 for the sensor signal line 24 to pass through and the grommet 22 for each phase wire 23 to pass through are respectively provided, so there is also the problem of a large number of components.

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