CN202690660U

CN202690660U - Self-elevating combined screw

Info

Publication number: CN202690660U
Application number: CN 201220393315
Authority: CN
Inventors: 周乾
Original assignee: Zhejiang Jing Yi Standard Component Co Ltd
Current assignee: Zhejiang Jing Yi Standard Component Co Ltd
Priority date: 2012-08-08
Filing date: 2012-08-08
Publication date: 2013-01-23
Anticipated expiration: 2022-08-08

Abstract

The utility model relates to a self-elevating combined screw, comprising a screw and a spacer. An installing hole is formed in the middle of the spacer, a spacer matching sleeve is arranged at the lower end of the screw head, and a flat-blade retainer ring is arranged between the upper end of the threaded part of the screw and the lower end of the screw head; the spacer is arranged between the flat-blade retainer ring and the screw head movably, and the outer diameter of the flat-blade retainer ring is greater than the inner diameter of the spacer installing hole. The self-elevating combined screw is characterized in that the screw and the spacer are combined together, the spacer is hung below the screw head, can be rotated freely and does not fall off; the spacer can fall along with screwing in the screw and self-elevate along with screwing out the screw; by arranging the flat-blade retainer ring below the spacer, the spacer does not fall off and is not locked, and the product quality is stable, the performance is reliable, the assembly is convenient, time is saved and the cost is low.

Description

The self-lifting screw assemblies

Technical field

The utility model relates to a kind of screw, relates in particular to a kind of self-lifting screw assemblies.

Background technique

Traditional tenminal block screw is to separate two independent parts with pad, generally all be to join a line ball pad by a normal screws, line ball pad endoporus is greater than the screw external diameter like this, pad can not rise together or descends with screw during line ball, need to hold up the ability line ball with other instruments, and pad is dropped or stuckly do not rotate, give assembling and use and brought very large inconvenience.

Summary of the invention

The purpose of this utility model is to overcome the defective of prior art, provide a kind of simple and reasonable, reliability is high, the convenient for assembly and self-lifting screw assemblies that uses.

For achieving the above object, the utility model adopts a kind of self-lifting screw assemblies, comprise screw and pad, the centre of pad is formed with a mounting hole, the adaptive cover of described pad arranges the lower end of screw head, the upper end, screw section of described screw, the lower end of screw head are provided with a flat cutter back-up ring, and pad is movably arranged between flat cutter back-up ring and the screw head, and the external diameter of described flat cutter back-up ring is greater than the internal diameter of pad mounting hole.

The self-lifting screw assemblies is to be combined by a screw and one piece of pad, and screw apart from pad extrude the most nearby one the circle flat cutter back-up ring, like this so that pad can be suspended on the screw and can freely rotate, pad and screw are connected to an integral body, pad can rise thereupon or descend along with screw rises or descends, and brings great help for assembling and wiring.

The utility model further arranges again, and the distance between described flat cutter back-up ring and the screw head is greater than the thickness of pad.

This design so that pad can between flat cutter back-up ring and screw head, freely rotate.

The utility model further arranges again, and described pad is set to square.

Can be set to circle or other shapes according to user's demand pad.

In sum, the beneficial effects of the utility model are: the self-lifting screw assemblies, screw and shim pack are combined, pad hangs over below the screw head, can freely rotate and can not drop, and pad can descend with screw-driving, back-out and certainly rise, below pad, be provided with a flat cutter back-up ring, make pad can not occur dropping and stuck phenomenon, and constant product quality, reliable performance, easy to assembly, save time and with low cost.

Description of drawings

Fig. 1 is the utility model embodiment's general assembly front view.

Fig. 2 is the front view of the utility model embodiment screw.

Fig. 3 is the utility model embodiment's stereogram.

Embodiment

As Figure 1-3, specific embodiment of the utility model is the self-lifting screw assemblies, comprise screw 1 and pad 2, screw 1 is provided with the flat cutter back-up ring 3 of a uniqueness between head 11 and screw section 12, so that pad 2 can freely rotate between the head 11 of screw 1 and flat cutter back-up ring 3, screw 1 forms an integral body with pad 2, and can descend along with tightening of screw 1, back-out and certainly rise, so that screw assemblies becomes convenient and light when assembling with wiring, saved the time, improved working efficiency, and this design, having solved traditional screw 1 drops and stuck not rotation phenomenon, reliable in structure with the pad 2 that pad 2 can occur when installing, stable performance.

Claims

1. self-lifting screw assemblies, comprise screw and pad, the centre of pad is formed with a mounting hole, the adaptive cover of described pad arranges the lower end of screw head, it is characterized in that: the upper end, screw section of described screw, the lower end of screw head are provided with a flat cutter back-up ring, pad is movably arranged between flat cutter back-up ring and the screw head, and the external diameter of described flat cutter back-up ring is greater than the internal diameter of pad mounting hole.

2. self-lifting screw assemblies according to claim 1, it is characterized in that: the distance between described flat cutter back-up ring and the screw head is greater than the thickness of pad.

3. self-lifting screw assemblies according to claim 1 and 2, it is characterized in that: described pad is set to square.