JPH0291247U

JPH0291247U -

Info

Publication number: JPH0291247U
Application number: JP16944688U
Authority: JP
Priority date: 1988-12-29
Filing date: 1988-12-29
Publication date: 1990-07-19
Also published as: JPH0452508Y2

Description

[Brief explanation of the drawing]

第１図ないし第３図は本考案の一実施例にかか
り、第１図はトラクシヨンドライブユニツトを示
す一部切欠の縦断面図、第２図は第１図の−
線断面矢視図、第３図は第１図のトラクシヨンド
ライブユニツトを利用したハンドドリルを示す一
部切欠の側面図である。また、第４図および第５
図は本考案の他の実施例にかかり、第４図はトラ
クシヨンドライブユニツトを示す一部切欠の縦断
面図、第５図は第４図のトラクシヨンドライブユ
ニツトを利用したスピンドルを示す一部切欠の側
面図である。２……高速軸支持用軸受、３，４……低速軸支
持用軸受、１０……ユニツトケース、１１……輪
状凸部（遊星ローラの摩擦転動面）、２０……高
速軸、２１……高速軸の凸軸、３０……低速軸、
３１……低速軸の突片、４０……遊星ローラ。 1 to 3 show an embodiment of the present invention, in which FIG. 1 is a longitudinal sectional view with a partial cutaway showing a traction drive unit, and FIG.
3 is a partially cutaway side view showing a hand drill using the traction drive unit of FIG. 1. Also, Figures 4 and 5
The figures show other embodiments of the present invention; FIG. 4 is a partially cutaway vertical sectional view showing a traction drive unit, and FIG. 5 is a partial view of a spindle using the traction drive unit of FIG. 4. It is a side view of a notch. 2... Bearing for supporting high speed shaft, 3, 4... Bearing for supporting low speed shaft, 10... Unit case, 11... Annular convex portion (friction rolling surface of planetary roller), 20... High speed shaft, 21... ...Convex shaft of high speed axis, 30...Low speed axis,
31...Low speed shaft protrusion, 40...Planetary roller.

Claims

[Scope of Claim for Utility Model Registration] A cylindrical unit case having a through hole, a high speed shaft that is inserted into the through hole of the unit case from both left and right open ends of the unit case so as to butt each other, and is supported via a rolling bearing. Press-fitted between the low-speed shaft and the inner circumferential surface of the area between the rolling bearings on both sides of the unit case, the high-speed shaft, and the shaft end so as to be frictionally rotatable, and rotatably held at the shaft end of the low-speed shaft. A traction drive unit having a configuration including a plurality of planetary rollers, characterized in that only the friction rolling surfaces of the planetary rollers in the unit case are hardened, and other parts of the unit case are left unhardened. Traction drive unit.