JPH0244567U

JPH0244567U -

Info

Publication number: JPH0244567U
Application number: JP12452988U
Authority: JP
Priority date: 1988-09-22
Filing date: 1988-09-22
Publication date: 1990-03-27

Description

[Brief explanation of drawings]

第１図は本考案の一実施例を示す縦断面図、第
２図は第１図におけるＡ―Ａ断面図、第３図は第
２図におけるケース、ピン及びスプリングの一組
立体を示す図、第４図は第３図におけるＢ―Ｂ断
面図である。１０……ステアリングホイール、１１……ウオ
ームシヤフト、１２……ボールナツト、１２ａ…
…ラツク歯、１２ｂ……一方の外側面、１２ｃ…
…凸部、１３……セクタシヤフト、１３ａ……セ
クタ歯、１４……ハウジング、１５……ケース、
１５ａ……大径孔、１５ｂ……小径孔、１５ｃ…
…段部、１６……ピン、１６ａ……大径部、１６
ｂ……小径部、１６ｃ……押圧部、１７……スプ
リング、１８……スナツプリング、２１……孔、
２２……スリツト。 Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig. 3 is a diagram showing an assembly of the case, pin, and spring in Fig. 2. , FIG. 4 is a sectional view taken along line BB in FIG. 3. 10... Steering wheel, 11... Wormshaft, 12... Ball nut, 12a...
...Rack tooth, 12b...One outer surface, 12c...
...Convex portion, 13...Sector shaft, 13a...Sector tooth, 14...Housing, 15...Case,
15a...Large diameter hole, 15b...Small diameter hole, 15c...
...Stepped part, 16...Pin, 16a...Large diameter part, 16
b...small diameter part, 16c...pressing part, 17...spring, 18...snat spring, 21...hole,
22...Slit.

Claims

[Scope of utility model registration request]

A ball nut that is movable in the axial direction on a wormshaft that is connected to a steering wheel and is screwed onto the wormshaft so that it can rotate relative to the wormshaft; and a rack that is connected to a steering linkage mechanism of a vehicle and is formed on the outer surface of the ball nut. a sector shaft having sector teeth meshing with the teeth; a pressing member slidably supported in a housing in which the ball nut is accommodated in a direction perpendicular to one outer surface of the ball nut; A preload mechanism for a steering device comprising: a biasing means for biasing the ball nut in the circumferential direction of the wormshaft via the pressing member by biasing the ball nut toward an outer surface; a case fixed to the housing and having a stepped inner hole in a direction perpendicular to one outer surface of the ball nut; and one end of the case fixed to the stepped inner hole and stretched within the case. Consisting of a spring,
The pressing member has a large diameter portion that is supported by the large diameter hole of the stepped inner hole of the case and to which the other end of the spring is locked, and a large diameter portion that coaxially overlaps with the spring and that is supported in the large diameter hole of the stepped inner hole of the case. A small diameter portion supported by the small diameter hole of the hole and a pressing portion that presses one outer surface of the ball nut are respectively formed, and the large diameter portion of the pressing member is brought into contact with the large diameter hole of the case to press the pressing member. A preload mechanism for a steering device, characterized in that a ring is fitted to restrict movement of a member toward the ball nut.