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Magnetic pole sensor structure in assist unit

A technology of auxiliary components and sensors, applied in the direction of electric components, instruments, electrical components, etc., can solve problems such as motor length constraints, achieve the effect of improving design freedom, ensuring detection accuracy, and high design freedom

Inactive Publication Date: 2014-01-29
HONDA MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there is a restriction on the length of the motor in the axial direction, so a technology that achieves a structure that can effectively withstand large torques and suppresses the increase in size of the motor is required.

Method used

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  • Magnetic pole sensor structure in assist unit
  • Magnetic pole sensor structure in assist unit
  • Magnetic pole sensor structure in assist unit

Examples

Experimental program
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Embodiment Construction

[0064] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. First, use Figure 1 to Figure 4 The outline of the electric assist bicycle 1 of the present invention will be described. figure 1 It is a side view of the electric assist bicycle according to the embodiment of the present invention. figure 2 It is an enlarged side view of a main part of the structure of the magnetic pole sensor of the embodiment. image 3 is true figure 2 Diagram emphasizing the composition of the driving force. Figure 4 It is a cross-sectional view of the magnetic pole sensor structure of the embodiment cut through the pedal crank shaft, the motor shaft, the output shaft, and the idler shaft.

[0065] In addition, descriptions of front and rear, left and right, and up and down directions in the following description are directions as seen by a passenger (driver) riding on a motorcycle, unless otherwise specified. In addition, in the dr...

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Abstract

A magnetic pole sensor structure in the assist unit is provided which permits the extension of the tooth surface of the pinion gear attached to the motor shaft. The assist unit (16) has the brushless motor (15), the pinion gear (58), the magnetic pole sensor means (250) to detect the angle of rotation of the rotor (86), and the driver means (102) to control current flowing into the brushless motor (15) according to the angle of rotation of the rotor (86). The magnetic pole magnet (251) has the magnet (253) attached to the magnetic pole magnet proper (252), the extending part (254) which extends from the magnetic pole magnet proper (252) toward the tooth surface of the pinion gear (58), and the seal means (255) which is in contact with the periphery in the radial direction of the extending part (254). The sensor (261) faces the magnet (253) from the outside in the radial direction of the magnetic pole magnet (251). The magnetic pole sensor means (250) is arranged such that the magnetic pole magnet proper (252) and the seal means (255) are close to each other in the axial direction of the motor shaft (57).

Description

technical field [0001] The present invention relates to a magnetic pole sensor configuration for an auxiliary component of an electric assisted bicycle. Background technique [0002] Conventionally, electric power assist bicycles are known to include an auxiliary unit, a motor provided in the case of the auxiliary unit, a motor shaft provided in the motor, a pinion gear for transmitting the driving force of the motor to the rear wheel of the electric power assist bicycle via the auxiliary unit, The magnetic pole sensor device installed on the motor shaft of the motor to detect the rotation angle of the rotor is arranged between the pinion gear and the rotor (for example, refer to Patent Document 1 below). [0003] In the electric assist bicycle described in Patent Document 1, the driving force for assisting is output through a small sprocket provided on the motor shaft of the motor, and a Hall element as a magnetic pole sensor device is provided between the small sprocket an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B7/30B62M6/50
CPCH02K5/15Y02T10/70B60L2200/12H02K5/1732H02K7/116B60L11/007H02K5/10Y02T10/641H02K29/08H02K11/0021B60L50/20H02K11/215Y02T10/64
Inventor 黑木正宏小林直树
Owner HONDA MOTOR CO LTD