CN2375808Y

CN2375808Y - Lock bolt

Info

Publication number: CN2375808Y
Application number: CN 98234405
Authority: CN
Inventors: 陈德鹏
Original assignee: MEIDAHANG MECHANISM CO Ltd GUANGZHOU
Priority date: 1998-06-10
Filing date: 1998-06-10
Publication date: 2000-04-26
Anticipated expiration: 2008-06-10

Abstract

The utility model relates to a locking bolt, which comprises a bolt head and a bolt rod, wherein, the bolt rod is provided with an axial hole which is penetrated through the bolt head. The hole is provided with a rotary rod which can be moved lengthways. The lower end of the rotary rod is hinged with a convex block. The diameter of the upper end of the axial hole is smaller than the convex block. The bolt head is provided with a transverse groove which can be clamped into a rotary handle. When the locking bolt is screwed to be tight or loose, the rotary handle is extracted out of the top part of the bolt head and is breadthways clamped in the transverse groove of the bolt head to form a force arm. The rotary handle is wrenched by hand for obtaining greater twisting force moment. Tools of a wrench, etc., are not used for screwing tightly the locking bolt.

Description

A kind of lock bolt

The utility model relates to bolt, particularly a kind ofly need not the bolt that wrench can be tightened with the swing handle that carries.

Screwing bolt must be with instruments such as spanners.The applicable cases that some is specific, unscrew the bolt that connects some part or screw when folding or launch as folding bicycle; And for example, the open-air account that uses meets, its support when mounted, some part also need be used bolt tightening.Adjust the work of bolt degree of tightness under the condition in the open air like that, it is then very inconvenient to carry instrument such as spanner.

The purpose of the utility model is to provide a kind of lock bolt that assistant tool can screw or unscrew that need not.

Lock bolt described in the utility model has bolt head and screw rod, has the axial bore of through bolt head in the screw rod, the swing handle that Kong Zhongyou can vertically move, the hinged projection in swing handle lower end, the upper end diameter of axial bore only can make swing handle pass less than projection, has the translot that can snap in swing handle on the bolt head.

Bolt described in the utility model, hand-holdable bolt head screw rod is screwed in nut or the screw of the workpiece that is locked in, tightlier point strength when not enough when being threaded to, can extract swing handle out from the bolt head top, because of the diameter of projection can not be drawn out of greater than the axial bore upper end, swing handle extract out the back with the bent 90 ° of translots that snap in bolt head in the articulating point place of projection in, make swing handle become the long arm of force, the promotion swing handle can obviously improve the torsional moment to bolt, need not spanner and also can tight a bolt.

The sectional view of the described bolt of Fig. 1 and this bolt are used for the user mode schematic representation of folding bicycle handlebar;

Fig. 2 is the open mode figure of Fig. 1;

Fig. 3 is the sectional view of described bolt tightening two boards.

Embodiment one, as Fig. 1,2

Bolt is made up of bolt head 2 and screw rod 1, the axial bore 5 through bolt heads 2 in the screw rod 1, and the upper end diameter of axial bore 5 is smaller.Have swing handle 3 to vertically move in the axial bore, swing handle 3 upper ends connect a fixture block 3a in case in the swing handle 3 retraction axial bores 5, and hinged projection 4 diameters in swing handle 3 lower ends have the translot 2a that can snap in swing handle 3 greater than the upper end of axial bore 5 on the bolt head 2.

This bolt is as the handlebar link of folding bicycle, and the standpipe of front fork 8 of bicycle and handlebar sleeve pipe 6 be as being locked part, and the other end of stationary links 7 and two connecting rods is hinged respectively on two connected pieces.Have screw on the standpipe of front fork 8, be nut, handlebar sleeve pipe 6 is pressed on the standpipe of front fork 8, and the screw rod 1 of described bolt inserts sleeve pipe 6 and screws in the screw of vertical tube 8, and the fixture block 3a of swing handle 3 upper ends is stuck among the translot 2a of bolt head 2, as Fig. 1.Swing handle 3 is extracted out and is rolled over 90 ° and is stuck among the translot 2a as Fig. 2, and at the horizontal state of swing handle, swing handle 3 is the arm of force.

Embodiment two, as Fig. 3

The part the 6, the 8th that is locked, two boards, screw rod 1 penetrating item 6 screws in the screw of parts 8.Can certainly be that screw rod 1 runs through two parts 6,8 that are locked, tighten up with a nut in addition.

Claims

1, a kind of lock bolt, bolt head (2) and screw rod (1) are arranged, it is characterized in that: the axial bore (5) that has through bolt head (2) in the screw rod (1), the swing handle that Kong Zhongyou can vertically move (3), the hinged projection in swing handle lower end (4), the upper end diameter of axial bore (5) only can make swing handle (3) pass less than projection (4), has the translot (2a) that can snap in swing handle (3) on the bolt head (2).