JPH024763U

JPH024763U -

Info

Publication number: JPH024763U
Application number: JP8185188U
Authority: JP
Priority date: 1988-06-20
Filing date: 1988-06-20
Publication date: 1990-01-12

Description

[Brief explanation of drawings]

第１図はトルク伝達部材の嵌合穴の正面図、第
２図は同上の嵌合穴の要部拡大図、第３図はソケ
ツト型トルク伝達部材を一部破断した状態の斜面
図、第４図は６角形のトルク伝達部材の嵌合穴の
正面図、第５図は従来例のトルク伝達部材の嵌合
穴の正面図、第６図は同上の嵌合穴の要部拡大図
、第７図は他の従来例の嵌合穴の正面図、第８図
は同上の要部拡大断面図である。１……筒部、２……嵌合穴、３……凹部。 Figure 1 is a front view of the fitting hole of the torque transmission member, Figure 2 is an enlarged view of the main part of the same fitting hole as above, Figure 3 is a partially cutaway perspective view of the socket type torque transmission member, 4 is a front view of the fitting hole of the hexagonal torque transmission member, FIG. 5 is a front view of the fitting hole of the conventional torque transmission member, and FIG. 6 is an enlarged view of the main part of the same fitting hole. FIG. 7 is a front view of a fitting hole of another conventional example, and FIG. 8 is an enlarged sectional view of the same main part. 1... Cylinder part, 2... Fitting hole, 3... Recessed part.

Claims

[Scope of utility model registration request]

In a torque transmission member that has a fitting hole 2 in a cylindrical part 1 into which a tightening tool 6 such as a bolt or a nut is fitted, and tightens the tightening tool 6 by rotating the cylindrical part 1,
The angle formed by the two surfaces 31, 31 forming the recess 3 of the fitting hole 2 into which the corner 61 of the tightening tool 6 is fitted is slightly smaller than 120°, and the bottom 32 of the recess is rounded in an arc shape. A torque transmitting member in which the bottom 32 of the recess 3 is located outside a virtual arc 8 whose radius of curvature is the distance from the center of the recess 3 to the corner 61.