JPS6256429U

JPS6256429U -

Info

Publication number: JPS6256429U
Application number: JP14947285U
Authority: JP
Priority date: 1985-09-30
Filing date: 1985-09-30
Publication date: 1987-04-08

Description

[Brief explanation of the drawing]

第１図は本考案のブレーキ機構の縦断面図、第
２図は第１図のブレーキ機構の組付過程を示す部
分図、第３図は本考案の一実施例を示す縦断面図
、第４図は第３図のブレーキ機構の横断面図、第
５図は第１図のカム、カムフオロア、ジヨイント
およびブレーキ機構の非作動時における関係を示
す展開図、第６図は作動時における同展開図、第
７図は第１図のブレーキ機構の本出願人による先
行例、第８図は従来例を示す正面図である。１……車軸、２……車軸管、５……車輪ハブ、
１０……本体、１０ａ……内歯（第１噛合歯）、
１１……インナースリーブ、１４……クラツチ、
１４ａ……外歯（第２噛合部）、１５……インナ
ーカム、１５ａ……爪、１５ｂ……カム面、１６
……アウターカム、１６ｂ……突起、１７……カ
ムフオロア、３０，１３０……ブレーキ機構、３
１……ドラム、３２……スプリング、３３……摩
擦部材。 Fig. 1 is a longitudinal sectional view of the brake mechanism of the present invention, Fig. 2 is a partial view showing the assembly process of the brake mechanism of Fig. 1, and Fig. 3 is a longitudinal sectional view showing an embodiment of the invention. Figure 4 is a cross-sectional view of the brake mechanism in Figure 3, Figure 5 is an exploded view showing the relationship between the cam, cam follower, joint, and brake mechanism in Figure 1 when they are not in operation, and Figure 6 is an exploded view of the same when they are in operation. FIG. 7 is a front view showing a prior example of the brake mechanism shown in FIG. 1 by the present applicant, and FIG. 8 is a front view showing a conventional example. 1...Axle, 2...Axle tube, 5...Wheel hub,
10... Main body, 10a... Internal teeth (first meshing teeth),
11... Inner sleeve, 14... Clutch,
14a...External tooth (second meshing part), 15...Inner cam, 15a...Claw, 15b...Cam surface, 16
...Outer cam, 16b...Protrusion, 17...Cam follower, 30,130...Brake mechanism, 3
1...Drum, 32...Spring, 33...Friction member.

Claims

[Scope of utility model registration request]

A cylindrical body fixed to the outer end of a wheel hub rotatably assembled to the outer end of the axle tube, and power can be transmitted within the cylindrical body to the outer end protrusion of the axle inserted into the axle tube. an inner sleeve fixed to the
A clutch that is assembled to the inner sleeve or the cylindrical body so as to be movable in the axial direction and capable of transmitting power, and has second meshing teeth that removably mesh with the first meshing teeth provided on the cylindrical body or the inner sleeve. a cam follower rotatably assembled on the inner sleeve and resiliently abutting against the cam surface of the cam; a joint connecting the cam follower and the clutch in the axial direction; and a joint disposed between the axle pipe and the cam. a brake mechanism that brakes the cam to generate relative rotation between the cam and the cam follower when the axle is rotationally driven; In the freewheel hub device, the brake mechanism includes a cylindrical member fixed to the axle tube and an inner periphery of the cylindrical member. It consists of a friction member fixed along the friction member and a spring member that is arranged to be able to slide on the inner periphery of the friction member and exerts an expanding force outward in the radial direction, and when the cam rotates, the spring member A freewheel hub, characterized in that a guide portion having a slightly larger diameter portion is disposed at an inlet portion of an inner circumferential surface of the cylindrical member for guiding the friction member during fitting. Device.