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Compact multi-pushing-bolt pre-tightening device

A compact, push-up technology, applied in the direction of threaded fasteners, connecting components, screws, etc., can solve the problems of inconvenient operation, poor pre-tightening accuracy, etc., to improve work efficiency, high mechanical efficiency, and shorten fastening time Effect

Pending Publication Date: 2018-12-14
SHANGHAI MARINE EQUIP RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The bolt fasteners currently used in large quantities are generally in the form of an integrated connection between the main screw and the nut head. Usually, hammering, heating, hydraulic wrench and other methods are used to achieve fastening, but these methods have poor pre-tightening accuracy and inconvenient operation. shortcoming

Method used

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  • Compact multi-pushing-bolt pre-tightening device
  • Compact multi-pushing-bolt pre-tightening device
  • Compact multi-pushing-bolt pre-tightening device

Examples

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 , as shown in 2 and 3, a compact multi-jack pretensioning device, including a cylindrical nut body 1, a superhard washer 3 is arranged under the nut body 1, and a circular through hole is opened in the middle of the superhard washer 3 , the center of the nut body 1 has a threaded hole through the nut body 1, the circular through hole in the middle of the superhard washer 3 corresponds to the threaded hole in the center of the nut body 1, and the circular through hole in the middle of the superhard washer 3 is inserted into the threaded end of the screw 5 , the lower end surface of the superhard gasket 3 is in contact with the connected part 4, the central threaded hole of the nut body 1 is tightly fitted with the external thread of the threaded end of the screw rod, and there are several threaded through holes evenly arranged aro...

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Abstract

The invention relates to a compact multi-pushing-bolt pre-tightening device. A superhard gasket is arranged under a nut body. The middle portion of the superhard gasket is provided with a circular through hole. The center of the nut body is provided with a threaded hole which is through in the nut body. The circular through hole of the superhard gasket corresponds to the threaded hole of the center of the nut body. The threaded end of a screw rod is sleeved with the through hole of the superhard gasket. The lower end face of the superhard gasket makes contact with a connected part. The threaded hole of the center of the nut body is connected with an external thread of the threaded end of the screw end in a screw-thread fit mode. A plurality of threaded through holes are uniformly distributed on the periphery of the threaded hole of the center of the nut body. Pushing bolts are in threaded connection with the interiors of the threaded through holes. The bottoms of the pushing bolts abutagainst the upper end face of the superhard gasket. Compared with a traditional bolt fastener, the compact multi-pushing-bolt pre-tightening device has the advantages that the main screw rod and thehead of the nut are separated; axial force of the screw rod is uniformly distributed on the pushing bolts; the axial tensile force of the screw rod is acquired by tightening the pushing bolts; and thecompact multi-pushing-bolt pre-tightening device has the higher mechanical benefits.

Description

technical field [0001] The invention relates to a fastening bolt device, in particular to a bolt type multi-jack pretensioning device for fastening. Background technique [0002] The purpose of bolt connection is to realize the stable and reliable connection of the connected parts through bolts, which requires pre-tightening the bolts in a reasonable way before use to produce accurate and lasting pre-tightening force. The bolt fasteners currently used in large quantities are generally in the form of an integrated connection between the main screw and the nut head. Usually, hammering, heating, hydraulic wrench and other methods are used to achieve fastening, but these methods have poor pre-tightening accuracy and inconvenient operation. shortcoming. Contents of the invention [0003] The present invention aims to provide a compact multi-jack pretensioning device with high pretensioning precision, long-lasting stability, short fastening time and improved anti-loosening capa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B35/06F16B35/00
CPCF16B35/00F16B35/06
Inventor 杨文凯焦侬胡举喜史俊武
Owner SHANGHAI MARINE EQUIP RES INST
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