CN201575030U

CN201575030U - Self-locking screw and screw nut

Info

Publication number: CN201575030U
Application number: CN2009202905281U
Authority: CN
Inventors: 侯圣春
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-12-17
Filing date: 2009-12-17
Publication date: 2010-09-08
Anticipated expiration: 2019-12-17

Abstract

The utility model relates to a self-locking screw and screw nut, which is not easy to be dissembled and comprises a screw, wherein the screw comprises a screw cap and a lead screw, the screw nut is in threaded connection with the lead screw, the lead screw is provided with external thread, the screw nut is provided with internal thread, a screw hole is arranged on the screw nut, the internal thread of the screw nut is distributed on the screw hole wall, a lock tongue placing hole is formed at the lower part of the lead screw, two lock tongues are placed in the lock tongue placing hole, and a spring is arranged between the two lock tongues; a bottom enlarging cavity is formed outwards at the bottom part of the screw hole, the bottom enlarging cavity corresponds with the lock tongue placing hole, and the lock tongues can be inserted into the bottom enlarging cavity. The utility model can not be opened after being mounted, thereby effectively protecting the equipment requiring to be kept secret.

Description

Self-locking screw rod and nut

Technical field

The utility model relates to a kind of screw rod and nut, relates in particular to a kind of self-locking screw rod and nut.

Background technique

As everyone knows, screw rod and nut are widely used on the various machinery as link, machinery is easy to by dismounting, but equipment for the internal structure need to be keep secret, after finishing, assembling generally do not need to take apart, because screw rod and nut are easy to and can be disassembled, and make the equipment of need to be keep secret internal structure can not get maintaining secrecy.

Summary of the invention

The purpose of this utility model provides a kind of not easily detachable self-locking screw rod and nut.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of self-locking screw rod and nut, comprise screw rod, screw rod comprises nut and screw mandrel, the nut that has been threaded on the screw mandrel, and screw mandrel has outside thread, nut has internal thread, nut has screw, and the internal thread of nut is distributed on the screw wall, it is characterized in that: the screw mandrel bottom has the dead bolt putting hole, be placed with two dead bolts in the dead bolt putting hole, be placed with spring between two dead bolts; The screw bottom outwards has expansion chamber, the end, and it is corresponding with the dead bolt putting hole that the chamber is expanded at the end, and dead bolt can extend in the expansion chamber, the end.

The utility model can not be opened after installation, can effectively protect the equipment of need to be keep secret

Description of drawings

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

Fig. 2 is the structural representation of screw rod among Fig. 1;

Fig. 3 is the structural representation of nut among Fig. 1.

In the accompanying drawing:

1, nut 2, nut 3, screw mandrel 4, dead bolt putting hole

5, chamber 6, dead bolt 7, spring 8, screw are expanded in the end

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is further described:

A kind of self-locking screw rod and nut, as Fig. 1, Fig. 2, shown in Figure 3, comprise screw rod, screw rod comprises nut 1 and screw mandrel 3, nut has been threaded on the screw mandrel 3, screw mandrel 3 has outside thread, and nut has internal thread, and nut has screw 8, the internal thread of nut is distributed on screw 8 walls, screw mandrel 3 bottoms have dead bolt putting hole 4, are placed with in the dead bolt putting hole 4 between 6, two dead bolts 6 of two dead bolts and are placed with spring 7; Screw 8 bottoms outwards have expansion chamber 5, the end, and it is corresponding with dead bolt putting hole 4 that chamber 5 is expanded at the end, and dead bolt 6 can extend in the expansion chamber 5, the end.

Claims

1. self-locking screw rod and nut, comprise screw rod, screw rod comprises nut (1) and screw mandrel (3), the nut that has been threaded on the screw mandrel (3), and screw mandrel (3) has outside thread, nut has internal thread, nut has screw (8), and the internal thread of nut is distributed on screw (8) wall, it is characterized in that: screw mandrel (3) bottom has dead bolt putting hole (4), be placed with two dead bolts (6) in the dead bolt putting hole (4), be placed with spring (7) between two dead bolts (6); Screw (8) bottom outwards has expansion chamber (5), the end, and it is corresponding with dead bolt putting hole (4) that chamber (5) is expanded at the end, and dead bolt (6) can extend in the expansion chamber, the end (5).