CN2560784Y

CN2560784Y - Connecting bolt

Info

Publication number: CN2560784Y
Application number: CN 02262747
Authority: CN
Inventors: 汤铁
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-06-25
Filing date: 2002-06-25
Publication date: 2003-07-16
Anticipated expiration: 2012-06-25

Abstract

The utility model relates to a connecting bolt, which comprises a screw rod and a screw cap and is characterized in that the screw rod is a biconical double-end screw rod, of which the diameter at both ends is smaller than the diameter in the middle; both ends of the screw rod are respectively sleeved in the expansive inter taper sleeve and is connected with the screw cap; the expansive inner taper sleeve is an open round taper sleeve with a fracture, which is an inclined bevel or straight bevel. The utility model overcomes the difficulty that the assembly and disassembly of common connecting bolts are fussy and difficult under the state of interference fit, which not only requires great labor intensity but also may damage the thread of the screw rod easily. Moreover, the utility model has the advantages of simple structure, convenient assembly and disassembly and reliable connection.

Description

Connecting bolt

The utility model relates to a kind of connecting bolt, particularly a kind of interference fit connecting bolt.

Joints such as large-scale running device catcher are owing to be subjected to big shear action in the process of transmitting torque, it connects employing interference fit usually, make the shearing force uniform distribution, avoid stress to concentrate, cause the connecting bolt fracture, but the mode of interference fit makes installation very loaded down with trivial details and difficult, each installation or removal all need use bigger impact force that it is squeezed into or gets, very easily destroy the gong line on the gong bar, and the time that is spent in the process of installation and removal is more, labor strength is bigger.

The purpose of this utility model is loaded down with trivial details, difficult, the big defective of operation labor intensity of installing/dismounting that solves traditional interference fit connecting bolt, the utility model comprises screw rod and nut, screw rod is the biconial double threaded screw of two ends diameter less than the middle part diameter, two of screw rod is socket expansion inner conical drogue respectively, and is connected with nut.

The expansion inner conical drogue is the not closed circular tapered sleeve that a fracture is arranged, and fracture is oblique groove or straight groove.

Below in conjunction with drawings and Examples detailed content of the present utility model is described.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the sectional view of expansion inner conical drogue.

As shown in the figure, the utility model comprises that screw rod 1 and nut 2, screw rod 1 are the biconial double threaded screw of two ends diameter less than the middle part diameter, and two of screw rod 1 is socket expansion inner conical drogue 3 respectively, and is connected with nut 2.Expansion inner conical drogue 3 is for there being the not closed circular tapered sleeve of a fracture 4, and fracture 4 can be oblique groove or straight groove.In the working process of connecting bolt, the two ends of screw rod 1 should equate and have certain negative common difference than minor diameter with the internal diameter under expansion inner conical drogue 3 closed states; Its middle part than the thickness of major diameter and expansion inner conical drogue 3 with should and certain plus tolerance be arranged with the equal diameters of attachment hole; Than minor diameter and than the difference that 0.5-2mm is arranged between the major diameter according to actual needs.When mounted, at attachment hole interpolation screw rod 1, then expansion inner conical drogue 3 two from screw rod 1 is penetrated, earlier by the nut 2 that screws two ends simultaneously, the aperture that makes expansion inner conical drogue 3 regulate fracture 4 automatically along with screw rod 1 diameter variation reaches the effect of interference fit; During dismounting, after the loosen nut 2, impact screw rod 1 top gently, expansion sleeve 3 and gong bar 1 are withdrawed from.

The utility model has been owing to improved the shape of screw rod, and set up the expansion inner conical drogue, because of These installation and removal are all very convenient, not only reduced labour intensity, but also avoided dress Unload the damage of screw thread in the process, have simple in structurely, connect closely reliably advantage.

Claims

1, a kind of connecting bolt comprises screw rod and nut, it is characterized in that: screw rod (1) is the biconial double threaded screw of two ends diameter less than the middle part diameter, and two of screw rod (1) is distinguished socket expansion inner conical drogue (3) and is connected with nut (2).

2, connecting bolt according to claim 1 is characterized in that: expansion inner conical drogue (3) is for there being the not closed circular tapered sleeve of a fracture (4), and fracture (4) is oblique groove or straight groove.