CN201970082U - Fixed-type hydraulic pre-tightening device for bolt - Google Patents
Fixed-type hydraulic pre-tightening device for bolt Download PDFInfo
- Publication number
- CN201970082U CN201970082U CN2011200346158U CN201120034615U CN201970082U CN 201970082 U CN201970082 U CN 201970082U CN 2011200346158 U CN2011200346158 U CN 2011200346158U CN 201120034615 U CN201120034615 U CN 201120034615U CN 201970082 U CN201970082 U CN 201970082U
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- oil cylinder
- tightening device
- bolt
- fixed
- type hydraulic
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- Expired - Fee Related
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Abstract
A fixed-type hydraulic pre-tightening device for a bolt comprises an oil cylinder and a piston, wherein a threaded hole matched with a pre-tightening bolt is formed at the center of the oil cylinder; an annular groove is formed outside the lower end of the threaded hole; an oil cavity is formed at the bottom of the groove; the oil cavity is communicated with an oil inlet and an air outlet which are formed on two sides of the upper part of the oil cylinder; the piston adopts a barrel-shaped structure with a stepped through hole; the upper part of a barrel wall extends into the annular groove of the oil cylinder, which is matched with the barrel wall; the space between the barrel wall and the inner wall of the annular groove is sealed with a gasket ring; a sealing ring is arranged at the top of the barrel wall; threads are arranged on the outer side of the lower part of the barrel; and a locking nut is arranged on the threads. The fixed-type hydraulic pre-tightening device has a simple structure and a small volume, is convenient to operate and does not need to be detached; in addition, the fixed-type hydraulic pre-tightening device is particularly suitable for occasions with compact mechanical structures and narrow operation space.
Description
Technical field
The utility model relates to a kind of fixed bolt hydraulic pre-tightening device, belongs to the bolt hydraulic pre-tightening device and makes the field.
Background technology
For the bolt of diameter greater than 1 inch, it is very difficult with its pretension using the common manual torque wrench, must as the patent No. be by a kind of special bolt hydraulic pre-tightening device with its pretension
CN97234407.1 " bolt hydraulic bolting device " ZL201020173692.7 " combined bolt hydraulic bolting device ", ZL201020216976.X " homing position type bolt hydraulic elongator ", ZL201020216973.6 " strong sealing bolt hydraulic elongator ", ZL201020216978.9 " two oil cylinder bolt hydraulic elongator ", ZL201020216954.3 " hydraulic bolting device " all belong to this class.This class bolt hydraulic bolting device is detachable, soon behind the bolt pretension, it be unloaded from pretension bolt.It need be with bracing ring, has complex structure, the loaded down with trivial details effort of charge and discharge operations, and inefficiency is to the shortcomings such as correction adjustment inconvenience of pretension bolt pretightning force in use.
The utility model content
For overcoming the existing existing deficiency of detachable bolt hydraulic pre-tightening device, the utility model provides a kind of fixed bolt hydraulic pre-tightening device, form by oil cylinder and piston, it is characterized in that: the oil cylinder center is provided with the screwed hole that matches with pretension bolt, be provided with cannelure in outside, screwed hole lower end, be provided with oil pocket at bottom land; Described piston is the barrel shape structure that is provided with the stepped ramp type through hole, and bucket wall top puts in the associated oil cylinder cannelure, and is provided with sealing ring between the cannelure inwall, and sealing ring is equipped with at its top, and the outside, bucket wall bottom is provided with screw thread, and locking nut is housed on the screw thread.Described locking nut, its outer radial is provided with a plurality of blind holes.
Advantage of the present utility model is: 1, pre-tightening apparatus is without bracing ring, and is simple in structure, volume is little, consumptive material is few, energy-saving and cost-reducing, low cost of manufacture; 2, with behind the pretension bolt pretension, promptly be fixed on the preload piece and no longer pull down with pretension bolt, easy to operate, time saving and energy saving, be specially adapted to compact mechanical structure, the narrow and small occasion in operating space; 3, to the correction of pretension bolt pretightning force in use, only needing to connect high-pressure oil pipe at the fuel feed hole joint can carry out, and correction adjustment is convenient and swift.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples.
Fig. 1 is the utility model vertical section structure figure.
1. oil cylinders among the figure, 2. piston, 3. pretension bolt, 4. pre-clamping of workpieces one, 5. pre-clamping of workpieces 2 11. screwed holes, 12. cannelures, 13. oil pocket, 14. fuel feed holes, 15. fuel inlet fittings, 16. steam vents, 17. sealing plug screws, 21. locking nut, 22. sealing rings, 23. sealing rings, 24. screw threads, 211. blind holes.
The specific embodiment
As shown in Figure 1: a kind of fixed bolt hydraulic pre-tightening device, form by oil cylinder 1 and piston 2, described oil cylinder 1 center is provided with the screwed hole 11 that matches with pretension bolt 3, be provided with cannelure 12 in outside, screwed hole 11 lower end, be provided with oil pocket 13 at cannelure 12 bottom lands, oil pocket 13 communicates with fuel feed hole 14 and the steam vent 16 of being located at both sides, oil cylinder 1 top, and fuel inlet fitting 15 is housed on fuel feed hole 14, and sealing plug screw 17 is housed on steam vent 16; Described piston 2 is for being provided with the barrel shape structure of step through hole, bucket wall top puts in associated oil cylinder 1 cannelure 12, and adopt sealing ring 23 to seal between oil cylinder 1 cannelure 12 inwalls, its top is equipped with 22 pairs of oil pockets 13 of sealing ring and is sealed, the outside, its underpart is provided with screw thread 24, locking nut 21 is housed on the screw thread 24, and its outer radial is provided with a plurality of blind holes 211, is convenient to excellent the insertion in it it be stirred.During pretension bolt 3, fixed bolt hydraulic pre-tightening device is contained on the pretension bolt 3, be supported on pre-clamping of workpieces one 4 surfaces until piston 2 lower surfaces, give oil cylinder 1 pressurization then, oil cylinder 1 moves up under oil pocket 13 action of hydraulic force pretension bolt 3 pretensions, this moment is rotation lock nut 21 upwards, its upper end is contacted with 1 barrel of wall lower end of oil cylinder, oil cylinder 1 is withstood locking, do not allow its rollback, promptly pretension bolt 3 is remained on the pretension state forever, shed hydraulic coupling this moment, and the high-pressure oil pipe on the fuel inlet fitting 15 pulled down get final product.When needs are proofreaied and correct pretension bolt 3 pretightning forces, only need on fuel inlet fitting 15, connect high-pressure oil pipe and pressurize to adjust and get final product, easy to operate.
Claims (2)
1. a fixed bolt hydraulic pre-tightening device is made up of oil cylinder and piston, and it is characterized in that: the oil cylinder center is provided with the screwed hole that matches with pretension bolt, is provided with cannelure in outside, screwed hole lower end, is provided with oil pocket at bottom land; Described piston is the barrel shape structure that is provided with the stepped ramp type through hole, and bucket wall top puts in the associated oil cylinder cannelure, and is provided with sealing ring between the cannelure inwall, and sealing ring is equipped with at its top, and the outside, bucket wall bottom is provided with screw thread, and locking nut is housed on the screw thread.
2. a kind of fixed bolt hydraulic pre-tightening device according to claim 1, it is characterized in that: described locking nut, its outer radial is provided with a plurality of blind holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200346158U CN201970082U (en) | 2011-01-25 | 2011-01-25 | Fixed-type hydraulic pre-tightening device for bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200346158U CN201970082U (en) | 2011-01-25 | 2011-01-25 | Fixed-type hydraulic pre-tightening device for bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201970082U true CN201970082U (en) | 2011-09-14 |
Family
ID=44575188
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200346158U Expired - Fee Related CN201970082U (en) | 2011-01-25 | 2011-01-25 | Fixed-type hydraulic pre-tightening device for bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201970082U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103231235A (en) * | 2013-05-04 | 2013-08-07 | 中钢集团衡阳重机有限公司 | Hydraulic preloader |
| CN106870541A (en) * | 2017-04-17 | 2017-06-20 | 江苏智拓机械有限公司 | A kind of combination nut |
-
2011
- 2011-01-25 CN CN2011200346158U patent/CN201970082U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120296A (en) * | 2011-01-25 | 2011-07-13 | 江苏拓盛重工机械有限公司 | Hydraulic preloading device of fixed bolt |
| CN103231235A (en) * | 2013-05-04 | 2013-08-07 | 中钢集团衡阳重机有限公司 | Hydraulic preloader |
| CN103231235B (en) * | 2013-05-04 | 2015-07-29 | 中钢集团衡阳重机有限公司 | Hydraulic preloader |
| CN106870541A (en) * | 2017-04-17 | 2017-06-20 | 江苏智拓机械有限公司 | A kind of combination nut |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANTONG GAOSHENG MACHINERY MANUFACTURING CO., LTD. Free format text: FORMER OWNER: JIANGSU TUOSHENG HEAVY INDUSTRY MACHINERY CO.,LTD. Effective date: 20130628 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130628 Address after: Tongzhou District Pingchao town in Jiangsu province 226361 Nantong Tongyang Road No. 2 Patentee after: Nantong Gaosheng Machinery Co., Ltd. Address before: 226361 Jiangsu city of Nantong Province along the Yangtze River in Tongzhou District Chao Ping Town, No. 158 Patentee before: Jiangsu Tuosheng Heavy Industry Machinery Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110914 Termination date: 20130125 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |