CN2738016Y - Expansion screw - Google Patents
Expansion screw Download PDFInfo
- Publication number
- CN2738016Y CN2738016Y CN 200420078734 CN200420078734U CN2738016Y CN 2738016 Y CN2738016 Y CN 2738016Y CN 200420078734 CN200420078734 CN 200420078734 CN 200420078734 U CN200420078734 U CN 200420078734U CN 2738016 Y CN2738016 Y CN 2738016Y
- Authority
- CN
- China
- Prior art keywords
- expansion tube
- expanded
- screw
- screw mandrel
- setscrew
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Mutual Connection Of Rods And Tubes (AREA)
Abstract
The utility model provides an expanded screw which belongs to the technical field of the machinery and relates to a connecting fastener. The expanded screw comprises a guide screw, the back end of which is provided with a conical protrusion, a tubular expansion tube, the back part of which is longitudinally provided with a plurality of expanded openings. The guide screw passes through the expanded tube and the front end of the guide screw extends out of the expanded tube, and a cap nut is connected with the front end of the guide screw by a screw. The configuration of the front part of the expanded tube is a prism, the configuration of the rear part of the expanded tube is a cylinder, the outside surface of the back part of the expanded tube is provided with marks extending outwards used for increasing the frictional force, the conical protrusion of the rear end of the guide screw is provided with one or a plurality of raised strips which are longitudinally arranged, and the raised strips can be inserted into the expanded opening of the expanded tube. The expanded screw can be used for connecting two components of the mechanical product with good connecting fastness and ideal connecting effect, and meanwhile, the utility model has simple structure and high practicability.
Description
Technical field
The utility model belongs to field of mechanical technique, relates to a kind of connection fastening piece, particularly a kind of setscrew.
Background technique
Setscrew is as a kind of connection fastening piece, be generally used for the connection of the relevant object in concrete structure or brick wall surface fastening on.
Existing setscrew generally is made of parts such as screw mandrel, expansion tube and nuts.During use, in positions such as the wall punching that connects, the expansion tube that will have screw mandrel is then put into the hole earlier, and tightening nuts makes screw mandrel rear end dilating expansion pipe afterbody, thereby setscrew is fixed.
But when existing setscrew was used for connection between two parts of industrial products, because expansion tube is cylindrical, its smooth surface connected firmly inadequately, reverses easily or becomes flexible, and is difficult to obtain desirable connection effect.
Summary of the invention
The purpose of this utility model is at the existing the problems referred to above of existing setscrew, and a kind of setscrew of novel structure is provided, and makes it be suitable for two connections between the mechanical part, and has characteristics simple in structure, that be connected firmly.
The purpose of this utility model can realize by following technical proposal: this setscrew comprise a rear end have the screw mandrel of conical protrusions, one in a tubular form and the rear portion longitudinally have the expansion tube of some inflation openings, screw mandrel passes expansion tube and its front end stretches out expansion tube, a nut links by screw thread and screw mandrel front end, it is characterized in that, the front appearance of described expansion tube is a prism, the rear appearance of expansion tube is cylindrical body, and expansion tube rear outside surface is provided with the lines of the outside protrusion that is used to increase frictional force.
In above-mentioned setscrew, the conical protrusions place of described screw mandrel rear end has one to several raised lines that longitudinally is provided with, and raised line can embed in the inflation openings of expansion tube.
This setscrew normally is used for the connection between two parts of mechanical structure.Particularly, can be the shape of prism by this setscrew front appearance, phenomenon can not rotate when it is connected with a mechanical part; Simultaneously, the rear portion of this setscrew can be inserted an internal diameter and is slightly larger than in the pipe of its external diameter.When tightening nuts makes the rear portion of conical protrusions extrusion expansion pipe of screw mandrel rear end, expansion tube rear portion distending, its outer side surface is squeezed on the inner side surface of the pipe that is connected.At this moment, utilize the anti-skidding lines at expansion tube rear portion, increase its frictional force, can prevent that expansion tube from rotating with respect to pipe, to guarantee the firm connection of expansion tube.
Compared with prior art, the advantage of this setscrew is:
1, owing to adopt the shape of prism in the profile of expansion tube front portion, and the surface, rear portion is provided with anti-skidding lines, make this setscrew can be used for the connection between two parts of engineering goods, and connectivity robustness is good, has desirable connection effect.
2, in the screw mandrel rear end raised line is arranged, utilize them to embed in the inflation openings of expansion tube, make in the rotating screw cap process, screw mandrel is motionless with respect to expansion tube, can not occur that screw mandrel rotates together along with nut and the generation that nut can't be tightened phenomenon makes this setscrew easy to operate.
3, obvious, setscrew structure of the present utility model is simpler, but practical effect is good, has higher utility.
Description of drawings
Fig. 1 is the sectional view of the setscrew that provides of the utility model.
Fig. 2 is the profile schematic representation of expansion tube in the setscrew that provides of the utility model.
Among the figure, 1, expansion tube; 11, front portion; 12, rear portion; 13, inflation openings; 2, screw mandrel; 21, conical protrusions; 22, raised line; 3, nut; 4, packing ring; 5, lines.
Embodiment
As shown in Figure 1, this setscrew comprises parts such as expansion tube 1, screw mandrel 2, nut 3.Expansion tube 1 in a tubular form.As shown in Figure 2, in the present embodiment, the front portion 11 of expansion tube 1 is shaped as positive hexagonal prism, and rear portion 12 is shaped as cylindrical body.Rear portion 12 at expansion tube 1 longitudinally has some inflation openings 13.
Simultaneously, on the outer surface at expansion tube 1 rear portion 12, be provided with lines 5, the frictional force when being used to increase setscrew and being connected with pipe.Lines 5 outwards protrudes, and is connected as a single entity with expansion tube 1.
As shown in Figure 1, screw mandrel 2 passes expansion tube 1.Have conical protrusions 21 in the rear end of screw mandrel 2.The external diameter of conical protrusions 21 is slightly larger than the internal diameter of expansion tube 1.Also be provided with raised line 22 at protruding 21 places, raised line 22 longitudinally can embed in the inflation openings 13.The quantity of raised line 22 is less than or equal to the quantity of inflation openings 13.In the present embodiment, raised line 22 has two.
Nut 3 is to connect by the front end of screw thread with screw mandrel 2.By tightening nuts 3, make the reach of screw mandrel 2 rear ends, constantly the rear portion 12 of extrusion expansion pipe 1 can make expansion tube 1 rear portion 12 distendings.In the present embodiment, be provided with packing ring 4 between nut 3 and the expansion tube 1, packing ring 4 is socketed on the screw mandrel 2.
Claims (5)
1, a kind of setscrew, comprise that a rear end has the screw mandrel of conical protrusions (21) (2), one in a tubular form and the rear portion longitudinally have the expansion tube (1) of some inflation openings (13), screw mandrel (2) passes expansion tube (1) and its front end stretches out expansion tube (1), a nut (3) links by screw thread and screw mandrel (2) front end, it is characterized in that, front portion (11) profile of described expansion tube (1) is a prism, rear portion (12) profile of expansion tube (1) is cylindrical body, and expansion tube rear portion (12) outer surface is provided with the lines (5) of the outside protrusion that is used to increase frictional force.
2, setscrew according to claim 1 is characterized in that, the conical protrusions (21) of described screw mandrel (2) rear end locates to have one to several raised lines that longitudinally is provided with (22), and raised line (22) can embed in the inflation openings (13) of expansion tube (1).
3, setscrew according to claim 1 and 2 is characterized in that, the front portion (11) of described expansion tube (1) is shaped as positive hexagonal prism.
4, setscrew according to claim 2 is characterized in that, the quantity of described raised line (22) is less than or equal to the quantity of inflation openings (13).
5, setscrew according to claim 1 and 2 is characterized in that, is provided with packing ring (4) between described nut (3) and the expansion tube (1), and packing ring (4) is socketed on the screw mandrel (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420078734 CN2738016Y (en) | 2004-08-12 | 2004-08-12 | Expansion screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420078734 CN2738016Y (en) | 2004-08-12 | 2004-08-12 | Expansion screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2738016Y true CN2738016Y (en) | 2005-11-02 |
Family
ID=35347926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420078734 Expired - Fee Related CN2738016Y (en) | 2004-08-12 | 2004-08-12 | Expansion screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2738016Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106184395A (en) * | 2016-07-29 | 2016-12-07 | 奇瑞新能源汽车技术有限公司 | Structure under electric automobile A post |
-
2004
- 2004-08-12 CN CN 200420078734 patent/CN2738016Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106184395A (en) * | 2016-07-29 | 2016-12-07 | 奇瑞新能源汽车技术有限公司 | Structure under electric automobile A post |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20051102 Termination date: 20100812 |