Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Metallic resilient securing means
Patent
1990-03-09
1991-12-17
Lindsey, Rodney M.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Metallic resilient securing means
411517, 403326, F16B 2118
Patent
active
050730711
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a shaft stop bushing having a stop end surface and a longitudinal bore extending from the stop end surface. The bore includes a cylindrical portion and a circular groove, which is adjacent to the cylindrical portion and has a tapering end portion, for receiving a split stop ring mounted on the shaft which is surrounded by the bushing. In such a known shaft stop arrangement, expansion of a circlip used as a stop ring is necessary during mounting onto the shaft, and burrs on circlip and/or stop bushing create difficulties during the assembly if the stop bushing on the shaft has to be drawn over the circlip, which is still somewhat expanded when located in the annular groove of the shaft.
SUMMARY OF THE INVENTION
The object of the invention is to provide a stop ring and/or a shaft stop bushing such that the disadvantages of the known solution are avoided, and an automated assembly of a stop sleeve and a stop ring on the shaft which is suitable for large scale production is made possible.
The object of the invention is achieved by providing a second groove having a diameter larger than the first groove and adjacent to the first groove for receiving a slit stop ring so that the bushing and the stop ring form a subassembly.
It is advantageous here that the slit stop ring can be inserted into the additional larger-diameter circular groove before the stop bushing is mounted onto the shaft and is located in this groove under pretension until the subassembly has been mounted onto the shaft so that the stop ring surrounds the annular groove of the shaft. No scratching and hooking on the shaft can occur during the mounting, because the stop ring does not touch the shaft. Furthermore, the stop ring is already received in the stop bushing when it is pressed into the annular groove of the shaft by the stop bushing, and enters the first all-round groove of the stop bushing in an assembled state. Furthermore, the pre-assembled subassembly and the mounting of the subassembly upon the shaft can be automatized.
It is particularly advantageous to connect the second all-round groove, in which the stop ring is located before and during the mounting of the stop bushing on the shaft, to the first all-round groove by a funnel-shaped section which presses the compressible stop ring into the annular groove of the shaft when the stop bushing is slid further relative to the stop ring until the assembled state is reached in which the stop ring engages into the first all-round annular groove of the stop bushing. A simple auxiliary instrument is sufficient to limit the axial position of the stop ring relative to the annular groove of the shaft.
The present invention both as to its construction so to its mode of operation, together with additional objects and advantages thereof, will be best understood from the following detailed description of the preferred embodiment when read with reference to the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 shows a longitudinal cross-sectional view of a shaft stop bushing according to the invention and
FIG. 2 shows the pre-assembled subassembly comprising a stop bushing and a stop ring on a shaft before the stop ring has been pressed into an annular groove, which surrounds of the shaft.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A shaft stop bushing--called stop bushing 1 below--made of metal has two end faces 2 and 3 oriented parallel to each other. The stop bushing 1 is provided with a stepped longitudinal bore 4. The longitudinal bore 4 has a first cylindrical end section 5 which starts from the first end face 2 and serves as a bearing section for the stop bushing 1 on a shaft 6.
The end section 5 is joined by a first circular groove 7 of larger diameter than the end section 5. In longitudinal section the groove 7 has the contour of a circular segment which merges into a tapering first retaining section 8. The first retaining section 8 is adjoined by a narrower, substantially cylindrical, section 9. The section 9 may also b
REFERENCES:
patent: 1867296 (1932-07-01), Woodruff
patent: 2350311 (1944-05-01), Hall
patent: 2950132 (1960-08-01), Kocsuta
patent: 3812756 (1974-05-01), Wenger
patent: 4225263 (1980-09-01), Asberg
patent: 4405251 (1983-09-01), Kolchinsky et al.
patent: 4802700 (1989-02-01), Stevenson et al.
Herwig Wolfgang
Kleemann Dittmar
Kochendorfer Claus
Kochendorfer Lore
Kroger Uwe
Lindsey Rodney M.
Robert & Bosch GmbH
Striker Michael J.
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