A lock screw assembly for a shaft
A kind of screw sleeve, locking technology, applied in the direction of quick-action fasteners, etc., can solve the problem of weakening the strength of the shaft
Active Publication Date: 2021-03-12
河南航天精工制造有限公司
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- Abstract
- Description
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Problems solved by technology
[0003] The purpose of the present invention is to provide a deadbolt assembly for a shaft, which is used to solve the technical problem in the prior art that fastening the parts assembled on the shaft requires slotting on the shaft and weakening the strength of the shaft
Method used
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Embodiment Construction
[0024] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0025] A specific embodiment of the shaft locking screw assembly of the present invention, such as Figure 1 to Figure 8 As shown, it includes a screw sleeve 1 used to cooperate with the corresponding shaft. The screw sleeve 1 is threaded on the shaft 2, and is press fit with the part 3 to be fastened on the shaft 2. The part to be fastened can be a shaft Bearings assembled on top, engine casings or other parts that are fixed in position relative to shaft 2. Such as image 3 and Figure 8 As shown, the outer ring of the screw sleeve 1 is provided with four wrenching grooves 4 for positioning corresponding wrench tools, so as to facilitate the assembly of the screw sleeve 1 and the shaft 2 . In other embodiments, the number of wrench grooves can be two, three or greater than four, and four are preferred in this embodiment, which is convenient for proce...
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The invention relates to a shaft locking screw assembly. The shaft locking screw assembly includes a screw sleeve used for cooperating with the corresponding shaft thread. The internal thread of the screw sleeve is provided with a keyway extending in the axial direction. The shaft locking screw assembly also includes a wedge key used in conjunction with the keyway. The wedge key has a wedge-shaped surface for interference fastening assembly with the external thread section on the shaft, and a wedge-shaped surface arranged opposite to the wedge-shaped surface. The top-tightening surface that is press-fitted with the keyway in the radial direction. The keyway has a top-pressing surface that is used to press-fit with the top-tightening surface of the wedge key. The radial dimension of the top-pressing surface is larger than the thread bottom of the threaded hole Radial dimension. After the screw sleeve and the shaft are assembled, the wedge key is inserted into the keyway of the screw sleeve, the top tightening surface of the wedge key matches the pressing surface on the keyway, and the wedge-shaped surface of the wedge key interferes with the thread part on the shaft for fastening fit, limiting And lock the position of the parts to be fastened on the shaft on the screw sleeve and the shaft. During this locking process, there is no need to slot the shaft, and the strength of the shaft will not be affected.
Description
technical field [0001] The invention relates to a locking screw sleeve assembly for a shaft. Background technique [0002] The domestic aerospace engine shaft is a high-speed rotating shaft. In order to fasten the bearings and other parts on the high-speed rotating shaft, the existing technology mostly adopts the fastening method of the locking plate with the stop structure and the ordinary nut. This fastening method The stop structure on the middle locking plate matches the notch on the shaft, and the ordinary nut presses the locking plate on the bearing or other parts on the shaft, so as to achieve the purpose of fastening the bearing on the shaft or other parts on the shaft. The fastening method has a good anti-loosening effect, but this way of slotting on the shaft greatly weakens the strength of the shaft, especially for some hollow shafts, the strength of the shaft is greatly reduced, which affects its service life. Contents of the invention [0003] The purpose of ...
Claims
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IPC IPC(8): F16B21/08
CPCF16B21/08
Inventor 刘前峰付建建谢茂阳李蓓蕾徐家强
Owner 河南航天精工制造有限公司