CN206617414U - A kind of telescopic fastener - Google Patents
A kind of telescopic fastener Download PDFInfo
- Publication number
- CN206617414U CN206617414U CN201720356875.4U CN201720356875U CN206617414U CN 206617414 U CN206617414 U CN 206617414U CN 201720356875 U CN201720356875 U CN 201720356875U CN 206617414 U CN206617414 U CN 206617414U
- Authority
- CN
- China
- Prior art keywords
- screw thread
- nut
- interior bar
- bar
- screw
- 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 discloses a kind of extension type fastener, including nut and screw rod, nut is connected with screw rod, nut is internally provided with screw thread mouth, and screw thread mouth is connected with inner push-rod, and screw rod includes interior bar and motion bar, interior bar is provided in the bottom of nut, screw thread on the outside of interior bar is adapted with the screw thread on the inside of motion bar, and the stretches push rod of screw thread mouth is connected with the top of motion bar, and interior bar bottom is provided with limited block.The utility model can freely adjust the length of fastener, while being operated using the structure of screw thread mouth and nut to fastener, realize the fastening of dual component, extend the service life of screw element, it is ensured that the steadiness of whole screw element.
Description
Technical field
The utility model belongs to fastener areas, more particularly to a kind of telescopic fastener.
Background technology
Due to the limitation of state-of-the-art, processing technology, have one between the internal thread and external screw thread in bolt arrangement
Fixed gap, the bolt for the workpiece that is spirally connected easily produces loosening, or even comes off, and this phenomenon is in the spiral shell that pitch is larger, screw thread is longer
That is embodied with bolt is particularly evident.In this case, problem is typically mechanically solved using locking mechanism.But most spiral shell
Bolt-lock locking structure all has some shortcomings, such as hydraulic locking nut, and complicated volume is larger, conventional springs gasket construction,
Large diameter bolt application aspect manpower it is difficult and, bolt adds anti-rotation pin structure, and dismounting trouble can not be locked completely.
It is well known that in some large-scale, safe, accurate machineries, the connection between parts and components is generally needed
It is attached with fastener such as screw bolt and nut, as the flange connection in hydrogenation reactor, threaded connector used is equal
For the screw bolt and nut of special, major diameter alloy steel, in use, for the bolt head that prevents from assembling
Thread damage, it is necessary to be equipped with the manhole in bolt protection case, particularly hydrogenation reactor in bolt head outside screw exposed portion
The bolt of the Big Diameter Flanges such as flange connection is even more to install；Traditional, usual bolt protection case, is risen from nut
Bolt head on, and to be threadedly coupled the protective case of a nut type, Ji appearance and sizes are big, and body weight, and cost is higher, is not easy to
Demolition, installation during maintenance.
The content of the invention
To solve the above problems, the utility model discloses a kind of telescopic fastener, can freely adjust fastener
Length, while operated using the structure of screw thread mouth and nut to fastener, realize the fastening of dual component, extend screw thread
The service life of part, it is ensured that the steadiness of whole screw element.
In order to reach object above, the utility model provides following technical scheme：A kind of extension type fastener, including spiral shell
Cap and screw rod, nut are connected with screw rod, and nut is internally provided with screw thread mouth, and screw thread mouth is connected with inner push-rod, and screw rod includes interior bar
With motion bar, interior bar provides that the screw thread on the outside of the bottom of nut, interior bar is adapted with the screw thread on the inside of motion bar, screw thread mouth
Stretches push rod is connected with the top of motion bar, and interior bar bottom is provided with limited block.
As a kind of preferred scheme of the present utility model, the screw thread mouth may be configured as yi word pattern screw thread mouth or cross spiral shell
Line mouthful.
As a kind of preferred scheme of the present utility model, the motion bar is extended downwardly along interior bar, the motion bar
Outside is provided with screw thread.
As a kind of preferred scheme of the present utility model, pressure head is additionally provided with the inside of the interior bar, the pressure head can be with
Limited block is connected.
As a kind of preferred scheme of the present utility model, the motion bar is made with interior bar of titanium screw-thread steel.
Compared with prior art, the beneficial effect that the utility model possesses：The utility model passes through interior bar and motion bar
Connection, freely can extend or reduce the length of screw rod, to adapt to the length of different fastening parts, while a word can be used
Type or cross screw thread mouth extension spiro rod length, while the pressure head and limited block in interior bar can fix extension screw rod, keep away
Exempt to drive motion bar to move together in rotary course, it is ensured that the adaptation degree of screw rod.
Brief description of the drawings
Fig. 1 is the structural representation of telescopic fastener.
Reference numerals list：1- nuts, 2- screw rods, 3- screw thread mouths, 4- interior bars, 5- motion bars, 6- inner push-rods, 7- are spacing
Block, 8- pressure heads.
Embodiment
With reference to the accompanying drawings and detailed description, the utility model is further elucidated, it should be understood that following specific embodiment parties
Formula is merely to illustrate the utility model rather than limits scope of the present utility model.It should be noted that making below in description
Word "front", "rear", "left", "right", "up" and "down" refer to the direction in accompanying drawing, and word " interior " and " outer " refer to respectively
Be directed towards or the direction away from particular elements geometric centers.
Extension type fastener as shown in Figure 1, including nut 1 and screw rod 2, nut 1 is connected with screw rod 2, inside nut 1
Screw thread mouth 3 is provided with, screw thread mouth 3 is connected with inner push-rod 6, screw thread mouth 3 may be configured as yi word pattern screw thread mouth 3 or cross screw thread mouth
3, screw rod 2 includes interior bar 4 and motion bar 5, and interior bar 4 provides that, in the bottom of nut 1, motion bar 5 is extended downwardly along interior bar 4, living
The outside of lever 5 is provided with screw thread, the screw thread in the outside of interior bar 4 is adapted with the screw thread of the inner side of motion bar 5, and screw thread mouth 3 stretches
Push rod is connected with the top of motion bar 5, and the bottom of interior bar 4 is provided with limited block 7, and the inner side of interior bar 4 is additionally provided with pressure head 8, described
Pressure head 8 can be connected with limited block 7, and motion bar 5 is made with interior bar 4 of titanium screw-thread steel.
Due to the generation of increasing fastener, now with continuing to develop for mechanical field, the demand of fastener
It is being continuously increased, while in the fasteners, it is necessary to which a kind of fastener of extension type is fastened to parts, on nut 1
Using cross screw thread mouth 3 and equipped with nut 1, fastener can be fixed by two ways, cross screw thread mouth 3
Bottom is connected with inner push-rod 6, and inner push-rod 6 is acted on motion bar 5, and the screw thread in interior bar 4, interior bar 4 is connected with the bottom of nut 1
It is mutually adapted with the screw thread on motion bar 5 so that motion bar 5 can be freely interactive in interior bar 4, motion bar 5 is that middle part is hollow
Shape, is provided with pressure head 8 and limited block 7 on interior thick stick, can control the adjustable height of motion bar 5, it is ensured that the stability of fastener.
Technological means disclosed in the utility model scheme is not limited only to the technological means disclosed in above-mentioned embodiment, also
Including being combined constituted technical scheme by above technical characteristic.It should be pointed out that for the ordinary skill of the art
For personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and moistened
Decorations are also considered as protection domain of the present utility model.
Claims (5)
1. a kind of extension type fastener, including nut and screw rod, the nut are connected with screw rod, it is characterised in that：The spiral shell
Cap is internally provided with screw thread mouth, and the screw thread mouth is connected with inner push-rod, and the screw rod includes interior bar and motion bar, and the interior bar is consolidated
It is scheduled on the screw thread on the outside of the bottom of nut, the interior bar to be adapted with the screw thread on the inside of motion bar, the flexible of the screw thread mouth is pushed away
Bar is connected with the top of motion bar, and the interior bar bottom is provided with limited block.
2. a kind of extension type fastener according to claim 1, it is characterised in that：The screw thread mouth may be configured as a word
Type screw thread mouth or cross screw thread mouth.
3. a kind of extension type fastener according to claim 1, it is characterised in that：The motion bar is downward along interior bar
Extension, the outside of the motion bar is provided with screw thread.
4. a kind of extension type fastener according to claim 1, it is characterised in that：It is additionally provided with the inside of the interior bar
Pressure head, the pressure head can be connected with limited block.
5. a kind of extension type fastener according to claim 1, it is characterised in that：The motion bar uses titanium with interior bar
Gold shell line steel is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720356875.4U CN206617414U (en) | 2017-04-07 | 2017-04-07 | A kind of telescopic fastener |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720356875.4U CN206617414U (en) | 2017-04-07 | 2017-04-07 | A kind of telescopic fastener |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206617414U true CN206617414U (en) | 2017-11-07 |
Family
ID=60235686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720356875.4U Expired - Fee Related CN206617414U (en) | 2017-04-07 | 2017-04-07 | A kind of telescopic fastener |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206617414U (en) |
-
2017
- 2017-04-07 CN CN201720356875.4U patent/CN206617414U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171107 Termination date: 20200407 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |