CN202434330U - Screw stretcher - Google Patents
Screw stretcher Download PDFInfo
- Publication number
- CN202434330U CN202434330U CN2011205136758U CN201120513675U CN202434330U CN 202434330 U CN202434330 U CN 202434330U CN 2011205136758 U CN2011205136758 U CN 2011205136758U CN 201120513675 U CN201120513675 U CN 201120513675U CN 202434330 U CN202434330 U CN 202434330U
- Authority
- CN
- China
- Prior art keywords
- hydraulic cylinder
- hole
- nut
- screw rod
- piston
- 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 - Lifetime
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- Actuator (AREA)
- Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
Abstract
The utility model discloses a screw stretcher which comprises a hydraulic cylinder. A through hole is arranged on the hydraulic cylinder, a threaded sleeve is disposed at one end of the through hole, one end of the threaded sleeve is opposite to a piston of the hydraulic cylinder, and a nut shifting wheel is arranged at the other end of the through hole. Fastening stress on each screw is precisely controlled by the hydraulic cylinder, and uniform stress of all screws is guaranteed.
Description
Technical field
The utility model relates to a kind of device of fastening screw, relates in particular to a kind of hydraulic cylinder that utilizes and realizes fastening screw rod stretcher.
Background technology
Shell type reactor need limit the pressure of screw rod in the assembling work process, to guarantee the degree of packing of product device body.Carry out the fastening of screw rod through manpower, can guarantee consolidation, but only lean on people's sensation, can't guarantee the fastening stressed unanimity in back that finishes of all screw rods, this will cause the local compressing degree of product inconsistent, influences product and compresses effect.
The utility model content
The utility model technical problem to be solved provides a kind of screw rod stretcher, its utilize hydraulic cylinder to screw rod fastening stressed realization accurately control, guarantee the stressed unanimity of all screw rods.
In order to solve the problems of the technologies described above, the utility model is taked following technical scheme:
A kind of screw rod stretcher comprises hydraulic cylinder, and it is characterized in that: hydraulic cylinder is provided with through hole, is provided with thread bush at through hole one end, and the piston of thread bush one end and hydraulic cylinder is relative, is provided with the nut thumb wheel at the through hole other end.
Said hydraulic cylinder is cylindrical, and through hole is located on the central axis, on hydraulic cylinder, also is provided with the oil circuit interface, and said nut thumb wheel profile is a regular polygon, is preferably regular hexagon.
The utility model combines thread bush with screw rod; Through hydraulic cylinder thread-rolling screw cover screw rod is promoted, use nut thumb wheel clamp nut then, can accurately control the lifting capacity of hydraulic cylinder double thread cover; Thereby realize accurate repetitive operation, make the stressed unanimity of all screw rods.
Description of drawings
Fig. 1 is the utility model front view;
Fig. 2 is Fig. 1 along the cutaway view on the plane that through hole central axis and oil circuit interface axis are confirmed.
Embodiment
Below in conjunction with accompanying drawing, through embodiment the utility model is done to specify:
As depicted in figs. 1 and 2, hydraulic cylinder 1 is cylindrical, on central axis, is provided with through hole, and the through hole both sides are provided with piston 5 and piston 6, and one section of piston 5 and piston 6 and thread bush 2 relatively, can push up on the thread bush 2 when on two-piston stretches to, stretching out.Thread bush 2 is located at through hole one end, and the inboard has screw thread.Hydraulic cylinder 1 is provided with oil circuit interface 3, and oil circuit interface 3 is connected to two-piston through oil pipe and Hydraulic Station power is provided.Below hydraulic cylinder 1, be provided with a nut thumb wheel 4, profile is a regular hexagon, and the nut on inboard shape and the screw rod matches, and can overlap rotating nut on the loading nut.
During work, nut thumb wheel 4 passes screw rod with through hole, and nut thumb wheel 4 is enclosed within on the nut; Thread bush 2 tightens on the screw rod, control piston 5 and piston 6 rising ejection thread bushs 2 then, thus the screw rod trace is promoted; Then can 4 pairs of nuts of light rotating nut thumb wheel carry out fastening, when nut thumb wheel 4 is stressed can not be more further during clamp nut, driven plunger 5 and piston 6 are through driving thread bush 2 lift-bolts once more; After trace promoted, nut thumb wheel 4 can rotate again, carries out fastening to nut.So circulation is carried out, up to reaching the fastening degree that needs.Because operations such as jigger lifting piston all can accurately repeat, so can so screw rod be operated equally, thus make the fastening degree of all screw rods identical, reach best construction requirement.
Claims (3)
1. a screw rod stretcher comprises hydraulic cylinder, and it is characterized in that: hydraulic cylinder is provided with through hole, is provided with thread bush at through hole one end, and the piston of thread bush one end and hydraulic cylinder is relative, is provided with the nut thumb wheel at the through hole other end.
2. screw rod stretcher as claimed in claim 1 is characterized in that: said hydraulic cylinder is cylindrical, and through hole is located on the central axis, on hydraulic cylinder, also is provided with the oil circuit interface, and said nut thumb wheel profile is a regular polygon.
3. screw rod stretcher as claimed in claim 2 is characterized in that: said nut thumb wheel profile is a regular hexagon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205136758U CN202434330U (en) | 2011-12-12 | 2011-12-12 | Screw stretcher |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205136758U CN202434330U (en) | 2011-12-12 | 2011-12-12 | Screw stretcher |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202434330U true CN202434330U (en) | 2012-09-12 |
Family
ID=46783757
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205136758U Expired - Lifetime CN202434330U (en) | 2011-12-12 | 2011-12-12 | Screw stretcher |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202434330U (en) |
-
2011
- 2011-12-12 CN CN2011205136758U patent/CN202434330U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131127 Address after: 071056 West Road, Hebei, Baoding, No. 2222, No. Patentee after: Baoding Tianwei Baobian Electric Co., Ltd. Address before: 071051 Jin Di garden complex building, 128 chemical fiber road north, Baoding, Hebei Patentee before: Baoding Tianwei Group Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20120912 |
|
| CX01 | Expiry of patent term |