CN206830593U - A kind of dismountable upset bolt of screw rod - Google Patents

Abstract

A kind of dismountable upset bolt of screw rod is the utility model is related to, includes screw rod, nut, expansion sleeve；The expansion sleeve is set on screw rod；The screw rod includes optical axis and thread spindle；The outer end of the optical axis is conical head, and the inner is provided with coaxial screwed hole；The big end external diameter of the conical head is more than the internal diameter of expansion sleeve；The inner of the thread spindle is provided with the stud being threadedly coupled with screwed hole, and outer end is stretched out expansion sleeve and is connected with nut thread；Pad is additionally provided with the thread spindle between expansion sleeve and nut；The thread rotary orientation of the screwed hole is opposite with the thread rotary orientation of nut；The utility model can not only as common expansion bolt convenient use, and detachably, recovery, it is also reusable, so as to save cost, ensure that metope is attractive in appearance.

Description

A new type of expansion bolt with detachable screw rod

technical field

The utility model relates to a fastener, in particular to a novel expansion bolt with a detachable screw rod.

Background technique

Expansion bolts are widely used in the construction industry, especially in some occasions that require firm fixing, such as the installation of chandeliers, air conditioners, water heaters, etc.; although expansion bolts fix objects firmly and are easy to install, they are not easy to disassemble after installation, and forced demolition will damage the wall. Therefore, the expansion bolts can only be left in the wall, so that the expansion bolts cannot be used again. In addition, the bolt heads of some expansion bolts often protrude on the wall or the ground, which not only affects the appearance, but also causes safety hazards.

Utility model content

The purpose of the utility model is to provide a new type of expansion bolt with a detachable screw rod in order to overcome the deficiencies of the prior art, which can not only be used as conveniently as ordinary expansion bolts, but also can be disassembled, recycled, and reused, thereby saving costs, Make sure the wall is beautiful.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a new type of expansion bolt with a detachable screw rod, including a screw rod, a nut, and an expansion sleeve; the expansion sleeve is sleeved on the screw rod; the screw rod includes an optical axis and a threaded shaft; the outer end of the optical shaft is a tapered head, and the inner end is provided with a coaxial threaded hole; the outer diameter of the large end of the tapered head is greater than the inner diameter of the expansion sleeve; the inner end of the threaded shaft A stud that is threadedly connected with the threaded hole is provided, and the outer end extends out of the expansion sleeve and is threaded with the nut; the threaded shaft is also provided with a gasket between the expansion sleeve and the nut; the threaded screw of the threaded hole The direction of rotation of the thread of the nut is opposite.

Preferably, the outer end of the threaded shaft is also provided with a countersink for connecting an inner wrench.

Due to the application of the above-mentioned technical solution, the utility model has the following advantages compared with the prior art:

The novel expansion bolt with detachable screw rod described in the utility model can not only be used as conveniently as ordinary expansion bolts, but also can be disassembled, recycled, and reused, thereby saving costs and ensuring a beautiful wall surface.

Description of drawings

Below in conjunction with accompanying drawing, technical scheme of the utility model is further described:

Accompanying drawing 1 is the structure diagram of the novel expansion bolt with detachable screw rod described in the utility model.

Among them: 1. Optical axis; 11. Tapered head; 2. Expansion sleeve; 3. Thread shaft; 31. Stud; 32. Countersunk groove; 4. Gasket; 5. Nut.

detailed description

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail.

Accompanying drawing 1 is the novel expansion bolt that screw rod is detachable described in the utility model, comprises screw rod, nut 5, expansion sleeve 2; Said expansion sleeve 2 is sleeved on the screw rod; Said screw rod includes optical axis 1 and screw thread shaft 3; the outer end of the optical axis 1 is a conical head 11, and the inner end is provided with a threaded hole coaxial with the optical axis 1; the outer diameter of the large end of the conical head 11 is greater than the inner diameter of the expansion sleeve 2; The inner end of the threaded shaft 3 is provided with a stud 31 threadedly connected with the threaded hole, and the outer end stretches out the expansion sleeve 2 and is threaded with the nut 5; There is also a gasket 4 between them; when installing the expansion bolt, first insert the expansion bolt into the installation hole, at this time, two wrenches are used, one is used to fix the threaded shaft 3 to prevent the threaded shaft 3 from rotating, and the other is used to rotate the nut 5 , because the expansion sleeve 2 does not move, the nut 5 drives the threaded shaft 3 to move axially, and the expansion sleeve 2 is expanded by using the conical head 11, and the tighter the screw is, the greater the expansion is. At this time, the expansion bolt will be pulled out When the expansion bolt needs to be removed, the threaded shaft 3 can be pulled by a wrench to separate the threaded shaft 3 from the optical shaft 1, and the threaded shaft 3 can be taken out of the expansion sleeve 2; The screw thread direction of the threaded hole is opposite to that of the nut 5, so as to prevent the threaded hole from being tightened with the stud 31 when there is only one plate head rotating the nut 5, which is unfavorable for the separation of the threaded shaft 3 and the optical axis 1; The outer end of the shaft 3 is also provided with a countersunk groove 32 for connecting an inner wrench, so that the countersunk groove 32 can drive the threaded shaft 3 to rotate and separate from the optical shaft 1 .

Due to the application of the above-mentioned technical solution, the utility model has the following advantages compared with the prior art:

The novel expansion bolt with detachable screw rod described in the utility model can not only be used as conveniently as ordinary expansion bolts, but also can be disassembled, recycled, and reused, thereby saving costs and ensuring a beautiful wall surface.

The above are only specific application examples of the utility model, and do not constitute any limitation to the protection scope of the utility model. All technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the utility model.

Claims (2)

1. A novel expansion bolt with a detachable screw rod, comprising a screw rod, a nut, and an expansion sleeve; the expansion sleeve is sleeved on the screw rod; it is characterized in that: the screw rod includes an optical axis and a threaded axis; the optical axis The outer end of the shaft is a tapered head, and the inner end is provided with a coaxial threaded hole; the outer diameter of the large end of the tapered head is larger than the inner diameter of the expansion sleeve; the inner end of the threaded shaft is provided with a threaded connection with the threaded hole The outer end of the stud protrudes from the expansion sleeve and is threadedly connected with the nut; a gasket is also arranged between the expansion sleeve and the nut on the threaded shaft; the thread direction of the threaded hole is opposite to that of the nut . 2. The novel expansion bolt with detachable screw rod according to claim 1, characterized in that: the outer end of the threaded shaft is also provided with a countersunk groove for connecting an inner wrench.