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Rotation angle detection device

A technology of rotation angle detection and rotating body, applied in steering mechanism, transportation and packaging, vehicle parts, etc., can solve the problems of complicated and time-consuming assembly work

Inactive Publication Date: 2011-09-14
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, since the operation of storing the zero point after the rotation angle detecting device 10 is mounted on the automatic vehicle is performed, the assembly operation is complicated and time-consuming.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0032] figure 1 is a cross-sectional view of the rotation angle detection device according to Embodiment 1 of the present invention, figure 2 It is the exploded perspective view. In both drawings, the rotation angle detection device 30 according to Embodiment 1 includes a rotating body 1 made of insulating resin, a first detection body 2 , and a second detection body 3 . A spur gear portion 1A is formed on the outer periphery of the side surface of the rotating body 1 , a spur gear portion 2A is formed on the outer periphery of the first detection body 2 , and a spur gear portion 3A is formed on the outer periphery of the side surface of the second detection body 3 . The number of teeth of the spur gear portion 2A is different from that of the spur gear portion 3A. The spur gear portion 2A of the first detection body 2 meshes with the spur gear portion 1A of the rotating body 1 , and the spur gear portion 3A of the second detection body 3 meshes with the spur gear portion ...

Embodiment approach 2

[0056] In Embodiment 1 described above, the structure for urging the locking body 23 by the spring 24 has been described. However, in this embodiment, if Figure 5 As shown in the sectional view, a thin plate-shaped spring portion 26A as an elastic body is integrally formed on the locking body 26 made of insulating resin, and the locking portion 26B is brought into elastic contact with the spur gear portion 1A of the rotating body 1 . In addition, 26 C of release parts protrude toward the attachment hole 8B of the case 8, and are formed to expose to the outside. This structure is the same as that of Embodiment 1.

[0057] With such a configuration, the same effect as that of the first embodiment can be obtained by the same operation as that of the first embodiment. In addition, since it is not necessary to provide a separate spring separately, the number of parts can be reduced, and the rotation angle detection device can be formed at low cost.

Embodiment approach 3

[0059] In Embodiments 1 and 2 described above, the structure in which the locking bodies 23 and 26 are rotated has been described. However, in this embodiment, if Figure 6 As shown in the cross-sectional view, the locking body 27 biased by the spring 24 is provided so as to be slidable toward the center. The gear-shaped locking portion 27B at the front end of the locking body 27 is brought into elastic contact with the spur gear portion 1A of the rotating body 1 . Moreover, the inner periphery of 27 C of release parts protrudes toward the attachment hole 8B, and is comprised so that it may expose to the outside. Other configurations are the same as those in Embodiment 1.

[0060] With such a configuration, the same effect as that of the first embodiment can be obtained by the same operation as that of the first embodiment. In addition, as shown in Embodiments 1 and 2, since the locking bodies 23 and 26 do not rotate, the mounting area of ​​the locking body 27 and the sprin...

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PUM

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Abstract

The invention relates to a rotation angle detection device, including an angle rotary body 1 rotating in linked motion with a steering wheel; detectors 2 and 3 rotating in linked motion with rotary body 1; detecting parts 5 and 6 for detecting rotation of detectors 2 and 3; a control part 21 for detecting a rotation angle of rotary body 1 from a detection signal from detecting parts 5 and 6; a latching body 23 for latching the rotation of rotary body 1; and a case 8 containing the rotary body 1, detection parts 5 and 6, control part 21 and latching body 23. The Latching body 23 includes a latching part 23B urged by an elastic body 24 and brought into elastic contact with an outer periphery of the rotary body 1; and releasing part 23C for releasing an elastic contact of latching part 23B to rotary body 1 and a part of which is exposed to the outside of the case 8. Therefore, provided is no need to perform zero-point storage to the control part 21 when assembling the vehicle, mounting of the vehicle is easy, and an rotary angle is reliably detected.

Description

technical field [0001] The present invention relates to a rotation angle detecting device mainly used for detecting the rotation angle of a steering wheel of an automatic vehicle. Background technique [0002] In recent years, with the advancement of advanced functions of automobiles, various rotation angle detection devices are used to detect the rotation angle of the steering wheel, and various controls of the vehicle are performed using the rotation angle. This rotation angle detection device is mounted on an automobile by being disposed behind a steering wheel via a rotary joint fixed to the vehicle. The rotation connector and the rotation angle detection device form a through hole through which a steering shaft of the steering wheel is inserted. The rotation angle detection device detects the rotation of the steering shaft rotating in the through hole. [0003] refer to Figure 11 A conventional rotation angle detection device as known in JP-A-2006-258625 will be desc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B62D15/02
Inventor 小间彻也白发升三野田宏充大西贤英
Owner PANASONIC CORP