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Resolver for rotational position detection using resin bearings

A technology of rotating position and resolver, applied in the direction of bearing, bearing assembly, shaft and bearing, etc., can solve the problems of increasing cost and increasing bearing wear, and achieve the effect of long life and small size

Active Publication Date: 2019-10-11
OKUMA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] like Image 6 As shown, the use of bearings 93, 94 such as ball bearings for receiving radial loads and thrust loads using the resolver rotating shaft increases the cost
Furthermore, while the use of resins for the steel gears 28, 30 and housings can reduce costs and ensure small changes in backlash due to temperature changes, the use of resins for thrust bearings results in increased wear of the bearings The problem

Method used

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  • Resolver for rotational position detection using resin bearings
  • Resolver for rotational position detection using resin bearings
  • Resolver for rotational position detection using resin bearings

Examples

Experimental program
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Embodiment Construction

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. figure 1 The structure of a resolver for rotation detection according to an embodiment is shown. figure 2 Shows the view from above figure 1 Resolver shown. image 3 The structural components shown similar to those in the conventional encoder are denoted by the same reference numerals, and the description thereof will not be repeated below.

[0018] The resolver for rotation detection has a resin case 8 from which the fixed shaft 2 protrudes. The fixed shaft 2 is made of metal materials such as steel and processed to have a smooth surface. Next, the fixed shaft 2 is pushed into the resin housing 8 and is fixed in the resin housing 8.

[0019] On the fixed shaft 2, the rear core 5, the resin gear 1 and the retaining ring 3 are inserted in order from the resin housing 8 side. The resin gear 1 is formed with a hole in its center, the fixed shaft 2 passes through th...

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PUM

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Abstract

A resolver for rotation position detection, which includes a rotor part having a resin gear and a rotor core, the resin gear having a hole formed in a central part thereof, a fixed shaft passing through the hole, and the rotor core connecting to the resin gear; and a stator part having a fixed shaft, an excitation line, a detection line, a rear core and a resin casing, wherein the excitation line and the detection line are arranged around the fixed shaft and are at a distance in the diameter direction The fixed shaft is at a constant distance, the rear core is adjacent to or in contact with the fixed shaft, and the resin gear has a shape in which a central portion protrudes in the axial direction to contact the rear core.

Description

[0001] Cross references to related applications [0002] The full text of Japanese Patent Application No. 2015-182072 filed on September 15, 2015, including the specification, claims, drawings, and abstract, is incorporated herein by reference. Technical field [0003] The present invention relates to an improvement of a position detection device used in the detection of the rotation angle amount of a feed shaft of a machine tool, etc., in particular to a resolver using a resin bearing. Background technique [0004] An effective resolver is disclosed in JP5524600 B, which uses a speed reducer and multiple resolvers as a detection device for detecting rotation. [0005] Figure 4 It is a cross-sectional view of a conventional encoder disclosed in JP 5524600 B in a direction perpendicular to its axial direction. Figure 5 For along Figure 4 A cross-sectional view of the line B-B shown. Image 6 For along Figure 4 A cross-sectional view of the line A-A. The rotor 60 is assembled to the i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02K11/225G01D5/14
CPCG01D5/147F16C17/04G01D5/2046F16C2220/04F16C33/20F16C41/007
Inventor 柴田伸二川上泰典
Owner OKUMA CORP