CN201673002U - Multi-cylinder type screw bolt pretightening force detecting device - Google Patents
Multi-cylinder type screw bolt pretightening force detecting device Download PDFInfo
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- CN201673002U CN201673002U CN2010202247006U CN201020224700U CN201673002U CN 201673002 U CN201673002 U CN 201673002U CN 2010202247006 U CN2010202247006 U CN 2010202247006U CN 201020224700 U CN201020224700 U CN 201020224700U CN 201673002 U CN201673002 U CN 201673002U
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Abstract
The utility model relates to a multi-cylinder type screw bolt pretightening force detecting device, which comprises an upper pressing plate, a lower pressing plate and at least two hydraulic cylinders, wherein the center of each hydraulic cylinder is provided with an unthreaded hole, a test screw bolt passes through the upper pressing plate and the unthreaded holes in the center of the hydraulic cylinders, annular pistons are arranged in the hydraulic cylinders, extending arms are arranged on the outer circumference of the hydraulic cylinders, the end parts of the extending arms are provided with through holes, the center of the lower pressing plate is provided with a lug boss, at least two threaded holes with different diameters are arranged in the same radial position in the circumferential direction of the lower pressing plate, the hydraulic cylinders are connected with the trapezoidal lug boss through the through holes arranged at the end parts of the extending arms, the distance from the hydraulic cylinders to the extending arms equals to the distance from the center of an upper threaded hole of the lower pressing plate to the center of the trapezoidal lug boss, the center of the upper pressing plate is provided with an axial through hole, a through hole corresponding to the position of the threaded hole of the lower pressing plate is also arranged on the upper pressing plate, and the hydraulic cylinders are communicated with a digital pressure meter and an oil tank. The utility model has convenient operation, and can be used for measuring screw bolt pretightening force in different diameter range sections.
Description
Technical field
The utility model relates to a kind of bolt pretightening pick-up unit, especially relates to a kind of multi-cylinder type bolt pretightening pick-up unit.
Background technology
Use bolt in the wind power generating set in a large number and connect, it is the performance parameter of paying close attention to most that pretightning force connects for bolt, in order to ensure safety, needs accurately to know bolt pretightening in the bolt installation process.General way is to know bolt pretightening by the deflection of measuring bolt.Because the bolt deflection is very little, therefore, be difficult to accurately measure, can't accurately know the pretightning force of bolt.
Chinese patent ZL 200820159176.1 discloses the device that a kind of pressure that utilizes hydraulic cylinder directly obtains bolt pretightening, the measuring accuracy height, but because each piece lower platen can only detect a kind of bolt of diameter, utilize this pick-up unit when the bolt to different-diameter detects, whole hydraulic cylinder must be taken off from stand, again hydraulic cylinder is put on the lower platen after changing corresponding lower platen, changes the top board corresponding at last, the operating performance trouble with lower platen; In addition,, utilize a kind of hydraulic cylinder can only measure the bolt of a certain diameter segment scope,, can not utilize this hydraulic cylinder to measure the diameter bolt in this scope not because the size of volume, height and the oil pressure of hydraulic cylinder all is difficult to accurate control.
The utility model content
The purpose of this utility model is to overcome the above-mentioned defective that prior art exists, and provides a kind of easy to operate, the multi-cylinder type pretightning force pick-up unit that can measure the bolt of different-diameter range section.
The purpose of this utility model is achieved through the following technical solutions: it comprises top board, lower platen, also comprise at least two hydraulic cylinders, the center of hydraulic cylinder is provided with unthreaded hole, be provided with annular piston in the hydraulic cylinder, the hydraulic cylinder excircle is provided with adjutage, the adjutage end is provided with through hole, described lower platen center is provided with boss, the same radial position of lower platen circumferencial direction is provided with the threaded hole of at least two different-diameters, hydraulic cylinder links to each other with trapezoid boss by adjutage end through hole, distance to the trapezoid boss center equates hydraulic cylinder to the center of the distance of adjutage and lower platen upper screwed hole, the center of top board is provided with axially extending bore, also be provided with on top board and the corresponding through hole in lower platen threaded hole position, hydraulic cylinder is communicated with digital pressure gauge and fuel tank.
The utility model utilizes a plurality of hydraulic cylinders that the bolt of different-diameter range section is measured, because the bolt size that each hydraulic cylinder detects is limited, therefore under the constant condition of other parts, its versatility is stronger.When measuring the bolt pretightening of different-diameter, as long as hydraulic cylinder is rotated on lower platen along boss, find the threaded hole relative with testing bolt, can measure the pretightning force of this bolt, and need not whole hydraulic cylinder is taken off from stand, help alleviating working strength, easy to operate, and can utilize different hydraulic cylinders to measure the bolt of different diameter segment scopes, measuring accuracy height.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment;
Fig. 2 is the perspective view of throwing off behind the top board embodiment illustrated in fig. 1;
Fig. 3 is the structural representation of top board embodiment illustrated in fig. 1;
Fig. 4 is the structural representation of lower platen embodiment illustrated in fig. 1.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described.
With reference to accompanying drawing, present embodiment comprises hydraulic cylinder I 6, hydraulic cylinder II 10, hydraulic cylinder III 17, top board 2, lower platen 7, hydraulic cylinder I 6, the center of hydraulic cylinder II 10 and hydraulic cylinder III 17 is equipped with unthreaded hole, be provided with annular piston I 3 in the hydraulic cylinder I 6, be provided with annular piston II 1 in the hydraulic cylinder II 10, also be provided with corresponding annular piston (not shown) in the hydraulic cylinder III 17, hydraulic cylinder I 6 excircles are provided with adjutage I 8, hydraulic cylinder II 10 excircles are provided with adjutage II 9, hydraulic cylinder III 17 peripheries are provided with adjutage III 18, adjutage I 8 ends and adjutage II 9 ends are respectively equipped with through hole I 16 and through hole II 15, adjutage III 18 ends also are provided with through hole, described lower platen 7 centers are provided with trapezoid boss 14, the same radial position of lower platen 7 circumferencial directions is provided with the threaded hole 13 of 12 different-diameters, hydraulic cylinder I 6, hydraulic cylinder II 10, hydraulic cylinder III 17 is respectively by adjutage I 8 end through hole I 16, adjutage II 9 end through hole II 15, adjutage III 18 end through holes link to each other with trapezoid boss 14, hydraulic cylinder I 6 centers, hydraulic cylinder II 10 centers, hydraulic cylinder III 17 center branches are clipped to adjutage I 8 centers, adjutage II 9 centers, the distance at through hole center, adjutage III 18 end all equates with the center of lower platen 7 upper screwed holes 13 distance to trapezoid boss 14 centers, top board 2 centers are provided with axially extending bore III 11, on top board 2, also be provided with and the corresponding through hole in lower platen 7 threaded holes, 13 positions, hydraulic cylinder I 6, hydraulic cylinder II 10, hydraulic cylinder III 17 all is communicated with digital pressure gauge and fuel tank.
During work, select the hydraulic cylinder adapt according to the diameter of test bolt 5, to test the center unthreaded hole that bolt 5 passes the through hole IV 12 on the top board 2, corresponding hydraulic cylinder, test bolt 5 one ends are connected with lower platen 7 threaded holes 13, and the other end is connected on the top board 2 by nut 4.During detection, apply pre-fastening moment for test bolt 5, test bolt 5 transmits the annular piston that places hydraulic cylinder with the pretightning force that is subjected to by top board 2, thereby bolt pretightening is converted to the pressure of hydraulic oil, directly reads bolt pretightening by digital pressure gauge.When one of them in utilizing three hydraulic cylinders detected, itself and two hydraulic cylinders were symmetrically distributed on top board 2, and the depth pistion unanimity of three hydraulic cylinders, and top board 2 is evenly stressed, the accuracy of detection height.In the time will measuring the bolt of other diameters, only corresponding hydraulic cylinder need be rotated on lower platen 7 along annular boss 14, find on the lower platen with the corresponding threaded hole 13 of bolt to be detected after, repeat above-mentioned steps, can measure the bolt of other diameter dimension.
Because the bolt size that each hydraulic cylinder detects is limited, therefore under the constant condition of other parts, a plurality of hydraulic cylinders can be measured the bolt of more dimension serieses, and versatility is stronger.
Claims (1)
1. multi-cylinder type bolt pretightening pick-up unit, comprise top board, lower platen, it is characterized in that, also comprise at least two hydraulic cylinders, the center of hydraulic cylinder is provided with unthreaded hole, be provided with annular piston in the hydraulic cylinder, the hydraulic cylinder excircle is provided with adjutage, the adjutage end is provided with through hole, described lower platen center is provided with boss, the same radial position of lower platen circumferencial direction is provided with the threaded hole of at least two different-diameters, hydraulic cylinder links to each other with trapezoid boss by adjutage end through hole, and the distance to the trapezoid boss center equates that the center of top board is provided with axially extending bore to hydraulic cylinder to the center of the distance of adjutage and lower platen upper screwed hole, also be provided with on top board and the corresponding through hole in lower platen threaded hole position, hydraulic cylinder is communicated with digital pressure gauge and fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202247006U CN201673002U (en) | 2010-06-13 | 2010-06-13 | Multi-cylinder type screw bolt pretightening force detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202247006U CN201673002U (en) | 2010-06-13 | 2010-06-13 | Multi-cylinder type screw bolt pretightening force detecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201673002U true CN201673002U (en) | 2010-12-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202247006U Expired - Fee Related CN201673002U (en) | 2010-06-13 | 2010-06-13 | Multi-cylinder type screw bolt pretightening force detecting device |
Country Status (1)
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| CN (1) | CN201673002U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507175A (en) * | 2011-11-08 | 2012-06-20 | 北京工业大学 | Experimental device for testing normal static characteristic of bolted joint |
| CN102889956A (en) * | 2012-10-24 | 2013-01-23 | 滁州市庆福机电制造有限公司 | Shaft and hole interference fit loosening force detecting device |
| CN107636437A (en) * | 2015-05-18 | 2018-01-26 | 博尔霍夫.奥塔陆股份有限公司 | For to the power survey tool for the system being crimped on element on part |
| CN109974920A (en) * | 2019-04-12 | 2019-07-05 | 哈尔滨电机厂有限责任公司 | A kind of bolt fastener stress dynamic monitoring method |
| CN110501231A (en) * | 2019-08-29 | 2019-11-26 | 中广核核电运营有限公司 | Nuclear steam turbine cylinder bolt stress and strain test macro |
| CN112985726A (en) * | 2021-02-25 | 2021-06-18 | 江苏徐工工程机械研究院有限公司 | Transverse vibration testing machine and method for fastener with axial loading function |
-
2010
- 2010-06-13 CN CN2010202247006U patent/CN201673002U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507175A (en) * | 2011-11-08 | 2012-06-20 | 北京工业大学 | Experimental device for testing normal static characteristic of bolted joint |
| CN102889956A (en) * | 2012-10-24 | 2013-01-23 | 滁州市庆福机电制造有限公司 | Shaft and hole interference fit loosening force detecting device |
| CN107636437A (en) * | 2015-05-18 | 2018-01-26 | 博尔霍夫.奥塔陆股份有限公司 | For to the power survey tool for the system being crimped on element on part |
| CN107636437B (en) * | 2015-05-18 | 2020-06-30 | 博尔霍夫.奥塔陆股份有限公司 | Force measuring tool for a system for crimping an element onto a component |
| CN109974920A (en) * | 2019-04-12 | 2019-07-05 | 哈尔滨电机厂有限责任公司 | A kind of bolt fastener stress dynamic monitoring method |
| CN110501231A (en) * | 2019-08-29 | 2019-11-26 | 中广核核电运营有限公司 | Nuclear steam turbine cylinder bolt stress and strain test macro |
| CN112985726A (en) * | 2021-02-25 | 2021-06-18 | 江苏徐工工程机械研究院有限公司 | Transverse vibration testing machine and method for fastener with axial loading function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101215 Termination date: 20160613 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |