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Magnetic torque sensor

A torque sensor, torque technology, applied in torque measurement, instrument, steering mechanism, etc., can solve the problem of torque sensor output error and so on

Inactive Publication Date: 2011-01-12
KYB CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, in the conventional torque sensor, when the adhesive between the ring magnet constituting the magnetic generation part and the rear yoke is peeled off, the fixing position of the ring magnet with respect to the first rotation shaft to which the rear yoke is fixed is broken. There is a problem that there is an error in the output of the torque sensor due to misalignment

Method used

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  • Magnetic torque sensor
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Experimental program
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Embodiment Construction

[0021] refer to figure 1 A power steering device for a vehicle to which the present invention is applied will be described.

[0022] In the power steering device 1, the first rotating shaft 10 serving as an input shaft and the second rotating shaft 20 serving as an output shaft rotate in conjunction with the steering wheel, and the rack shaft meshing with a pinion formed at the lower end of the second rotating shaft 20 is aligned along the axis direction. to move so that the wheels can be turned.

[0023] The power steering device 1 includes a worm gear 9 connected to the second rotating shaft 20 , a worm 19 meshing with the worm gear 9 , and a motor that rotates the worm screw 19 as an auxiliary mechanism that assists in applying steering torque. In the power steering device 1 , the electric motor applies steering assist torque to the second shaft 20 .

[0024] The power steering device 1 includes a torque sensor 50 that detects steering torque. In the power steering devic...

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PUM

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Abstract

In a torque sensor (50) that detects torque acting on a torsion bar (51) in accordance with the density of magnetic flux guided to a rotating magnetic circuit portion (69) from a magnetism generating portion (60), the magnetism generating portion (60) includes a back yoke (61) that rotates together with a first shaft (10), a ring magnet (63) joined to the back yoke (61), and an adhesive (64) that is interposed between the back yoke (61) and the ring magnet (63) to join the two, and the adhesive (64) includes a rotation-stopping projecting portion (64c) that engages with a rotation-stopping recess portion (61c) formed in the back yoke (61) to function as a latch for stopping relative rotation between the back yoke (61) and the ring magnet (63) when an adhesion portion thereof adhered to the back yoke (61) peels away.

Description

technical field [0001] The present invention relates to a torque sensor for detecting a torque acting on a torsion bar based on a magnetic flux density derived from a magnet. Background technique [0002] Conventionally, as a torque sensor provided in a steering device of a vehicle, a non-contact structure for detecting a steering torque acting on a rotatable shaft by magnetic force has been adopted. [0003] The torque sensors disclosed in JP2007-240496A and JP2007-292550A issued by the Japan Patent Office in 2007 all include a torsion bar rotatably accommodated in a casing, first and second rotating shafts connected to both ends of the torsion bar, fixed on The multi-pole magnet as the magnetic generation part of the first rotating shaft, the multi-pole yoke as the rotating magnetic circuit part fixed to the second rotating shaft, the fixed magnetic circuit part fixed to the case, and the part of the magnetic flux density sensor. [0004] When the torque acting on the to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L3/10B62D6/10
CPCG01L3/104G01L5/221
Inventor 前原秀雄
Owner KYB CORP