SU804879A1 - Key joint - Google Patents

Description

one

The invention relates to general engineering. It can be used to repeatedly fasten a part as it moves along the mating shaft.

A keyed connection is known, consisting of a shaft, a sleeve mounted on it and a taper key, located in the corresponding grooves of the shaft and in the tulas fl.

A disadvantage of this device is the absence of a guaranteed tension on the keys with both the shaft and the fixed part.

Closest to the proposed key connection., Which contains a shaft mounted on it a sleeve with a threaded cross hole, a wedge key located in the corresponding grooves of the shaft and sleeve, and a screw with a tapered end mounted in a threaded hole of the sleeve 2.

However, this device does not provide a large gap between the inclined and working faces of the keys and the shaft to move the sleeve along the shaft, and does not provide reliable tension in the connection due to the absence of a wear compensator for the key faces when the component is repeatedly mounted.

The purpose of the invention is to improve performance by speeding up the process of fixing and releasing the sleeve relative to the shaft.

This goal is achieved by the fact that the key, from the article: the shaft shaft is made with a through longitudinal groove and

0 with a tapered bore on the opposite side, connected to this slot, with the tapered end of the screw located in the said key hole.

Figure 1 shows schematically

5 wedge key; figure 2 - the interaction of the wedge key with the shaft and the sleeve; on fig.Z - section aa on F ig.2.

0

The wedge key consists of connecting 1 and working: 2 parts of the groove 3 and conical, holes 4, interacting with the conical end 5 of the screw 6, screwed into the sleeve 7, inclined 8 and parallel 9 working faces, contacting respectively the conical groove 10 of the shaft 11 and parallel groove 12 bushings.

Assembling the keyed connection to the NHH .aeicH with the production of the wedge ring 3, the corresponding grooves of the shaft and. the sleeve until the connecting part of the key touches the sleeve, then the screw is screwed into the sleeve 7 until the tapered end comes into contact with the tapered bore of the taper key.

By installing the sleeve .7. the screw b is screwed into position until it is retracted, but the halves of the working part of the key are moved apart until the inclined and parallel faces touch the grooves of the shaft and sleeve, creating a reliable fit for fixing the sleeve relative to the shaft 11, since the inclined and parallel the edges of the taper key are always in contact with the edges of the slots 10, 12, because the conical end.5 of the screw b moves the halves of the working part of the key both in the transverse direction and along the screw to uniformly select the gaps.

To change the position of the sleeve 7 relative to the shaft 11, it is necessary to unscrew the screw, then the spring-connecting part 1 of the key reduces the half of the working part of the key, providing a gap between the working edges of the key and the grooves, which facilitates the movement of the sleeve.

Such a constructive solution of the wedge key allows speeding up the process of moving and fixing the part relative to the shaft and ensuring their backlash-free and precise connection.

Claims (1)

1. Author's certificate  210 576, cl. F 16 B 3/00, 1968. 2, Copyright certificate  339,682, cl. R 16 a 3/00, 1972 (prototype). 3 S 8  Y / D