CN202867482U - Bolt provided with pretightening force detecting pin - Google Patents
Bolt provided with pretightening force detecting pin Download PDFInfo
- Publication number
- CN202867482U CN202867482U CN 201220585043 CN201220585043U CN202867482U CN 202867482 U CN202867482 U CN 202867482U CN 201220585043 CN201220585043 CN 201220585043 CN 201220585043 U CN201220585043 U CN 201220585043U CN 202867482 U CN202867482 U CN 202867482U
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- China
- Prior art keywords
- hole
- ring
- bolt
- test pin
- pin
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- 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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Abstract
The utility model discloses a bolt provided with a pretightening force detecting pin. The bolt provided with the pretightening force detecting pin is characterized by comprising an inside hexagonal bolt, the detecting pin, a fixed bar, a check ring, a spring and an adhesion agent. A ladder hole is formed in the axial direction of the inside hexagonal bolt, and a stepped hole is formed in the radial direction of the inside hexagonal bolt. The fixed bar is a polished bar, wherein one end of the polished bar is provided with a tapered bar cap. The fixed bar is arranged inside the ladder hole and the checking ring is arranged inside the stepped hole. The spring is arranged between the detecting pin and the check ring. According to the bolt provided with the pretightening force detecting pin, through a naked-eye observation way or a way that the detecting pin is touched by a hand, reduction or failure of pretightening force of the bolt can be found as soon as possible. The bolt provided with the pretightening force detecting pin has the advantages of being simple in structure and convenient to detect.
Description
Technical field
The utility model relates to technical field of fastening, especially a kind of bolt that is provided with the pretightening force test pin.
Background technique
In the prior art, can be found everywhere with the be connected fastening means of mechanical parts of bolt, in particular for the connecting bolt of motor on the wind-driven generator and tower cylinder and the connecting bolt of motor and blade, and the connecting bolt that is used for bridge upper connecting rod and bridge arch or bridge floor, all belong to important connection, because these bolts all bear oscillating load, loosening phenomenon is difficult to avoid, and must make regular check on these bolts, and the problem of existence is, the method that how can accomplish with the naked eye to observe or touch with hand, find early the sign of bolt looseness, the workload that not only can reduce to keep in repair is increased work efficiency, also can prevent trouble before it happens, reduce and avoid the generation of contingency.
The model utility content
The purpose of this utility model is a kind of bolt that is provided with the pretightening force test pin that provides for the deficiencies in the prior art, the utility model is by naked-eye observation or the method that touches with hand, the pretightening force that can find bolt reduces or inefficacy, has advantage simple in structure, easy to detect.
The concrete technological scheme that realizes the utility model purpose is:
A kind of bolt that is provided with the pretightening force test pin, its characteristics comprise hexagon socket head cap screw, test pin, fixing rod, back-up ring, spring and Bond, being axially arranged with shoulder hole, radially being provided with step hole of described hexagon socket head cap screw, shoulder hole is made of fixed hole, transitional pore and counterbore, step hole is made of pin-and-hole and back-up ring hole, wherein pin-and-hole and counterbore connect, and test pin is the polished rod that the middle part is provided with spring seat, and fixing rod is the polished rod that an end is provided with the inverted cone pole cap; Described fixing rod is located in the shoulder hole, its polished rod termination embeds the fixed hole of shoulder hole, Bond is connected fixing rod polished rod termination and fixed hole, back-up ring is located in the back-up ring hole of step hole, test pin is located in the step hole, the one end be positioned at pin-and-hole and touch with the inverted cone pole cap of fixing rod, the other end is positioned at back-up ring, spring housing is loaded on the test pin, and between the spring seat and back-up ring of test pin.
The utility model is by naked-eye observation or touch the method for test pin with hand, can find early that the pretightening force of bolt reduces or forfeiture, has advantage simple in structure, easy to detect.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the local structure for amplifying schematic diagram in the A place of Fig. 1.
Embodiment
Consult Fig. 1, Fig. 2, the utility model comprises hexagon socket head cap screw 1, test pin 2, fixing rod 3, back-up ring 5, spring 6 and Bond 4, being axially arranged with shoulder hole, radially being provided with step hole of described hexagon socket head cap screw 1, shoulder hole is made of fixed hole 12, transitional pore 13 and counterbore 14, step hole is made of pin-and-hole 15 and back-up ring hole 16, wherein pin-and-hole 15 connects with counterbore 14, and test pin 2 is provided with the polished rod of spring seat 21 for the middle part, and fixing rod 3 is the polished rod that an end is provided with inverted cone pole cap 31; Fixing rod 3 is located in the shoulder hole, its polished rod termination embeds the fixed hole 12 of shoulder hole, Bond 4 is connected fixing rod 3 polished rod terminations and fixed hole 12, back-up ring 5 is located in the back-up ring hole 16 of step hole, test pin 2 is located in the step hole, the one end be positioned at pin-and-hole 15 and touch with the inverted cone pole cap 31 of fixing rod 3, the other end is positioned at back-up ring 5, spring 6 is set on the test pin 2, and between the spring seat 21 and back-up ring 5 of test pin 2.
The assembling of dispatching from the factory of the present utility model:
The polished end of fixing rod 3 is inserted in the shoulder hole of hex head bolt 1, the fixed hole 12 of its termination and shoulder hole is press-fitted, and be connected with Bond 4, make the inverted cone pole cap 31 of fixing rod 3 be positioned at the counterbore 14 of hex head bolt 1, spring 6 is set on the test pin 2, then with test pin 2, spring 6 and back-up ring 5 are contained in the step hole, make an end of test pin 2 be positioned at pin-and-hole 15 and touch with the inverted cone pole cap 31 of fixing rod 3, the other end passes back-up ring 5 and exposes, at this moment, spring 6 is supported between the spring seat 21 and back-up ring 5 of test pin 2, remove at last the exsertion part of test pin 2, make test pin 2 concordant with the end face of back-up ring 5, the assembling of dispatching from the factory of the present utility model is finished.
The utility model is to use like this:
After 1 pair of mechanical parts enforcement of hex head bolt is fastening, under the effect of clamping force, hex head bolt 1 produces stress and corresponding strain, because the polished end of fixing rod 3 is fixed in the fixed hole 12 of shoulder hole, when hex head bolt 1 produces the axial strain elongation, fixing rod 3 does not stress, do not extend yet, under the effect of hex head bolt 1 axial strain, step hole is with respect to 31 displacements that produce △ L value of inverted cone pole cap of fixing rod 3, be that test pin 2 is with respect to the displacement of the inverted cone pole cap 31 generation △ L values of fixing rod 3, because an end of test pin 2 and the inverted cone pole cap 31 of fixing rod 3 touch, at this moment, the inverted cone pole cap 31 of fixing rod 3 promotes the elastic force that test pin 2 overcomes spring 6, the end face of the other end protrusion back-up ring 5 of test pin 2 is exposed, at this moment, expression hex head bolt 1 has been tightened, is in normal working; Otherwise, when hex head bolt 1 generation is loosening, clamping force reduces and even disappears, the axial strain that hex head bolt 1 produces disappears immediately, cause test pin 2 to diminish with respect to the △ L value between the inverted cone pole cap 31 of fixing rod 3, under the elastic force effect of spring 6, test pin 2 resets, and the exsertion part that makes test pin 2 protrude from back-up ring 5 end faces is retracted.Touch the exsertion part that test pin 2 protrudes from back-up ring 5 by naked-eye observation or with hand, can judge whether hex head bolt 1 is loosening, and whether working state is normal.
Claims (1)
1. bolt that is provided with the pretightening force test pin, it is characterized in that it comprises hexagon socket head cap screw (1), test pin (2), fixing rod (3), back-up ring (5), spring (6) and Bond (4), described hexagon socket head cap screw (1) be axially arranged with shoulder hole, radially be provided with step hole, shoulder hole is by fixed hole (12), transitional pore (13) and counterbore (14) consist of, step hole is made of pin-and-hole (15) and back-up ring hole (16), wherein pin-and-hole (15) connects with counterbore (14), test pin (2) is provided with the polished rod of spring seat (21) for the middle part, fixing rod (3) is the polished rod that an end is provided with inverted cone pole cap (31); Described fixing rod (3) is located in the shoulder hole, its polished rod termination embeds the fixed hole (12) of shoulder hole, Bond (4) is connected fixing rod (3) polished rod termination and fixed hole (12), back-up ring (5) is located in the back-up ring hole (16) of step hole, test pin (2) is located in the step hole, the one end be positioned at pin-and-hole (15) and touch with the inverted cone pole cap (31) of fixing rod (3), the other end is positioned at back-up ring (5), spring (6) is set on the test pin (2), and is positioned between the spring seat (21) and back-up ring (5) of test pin (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220585043 CN202867482U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting pin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220585043 CN202867482U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting pin |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867482U true CN202867482U (en) | 2013-04-10 |
Family
ID=48034204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220585043 Expired - Lifetime CN202867482U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting pin |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867482U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019232675A1 (en) * | 2018-06-04 | 2019-12-12 | 舍弗勒技术股份两合公司 | Screw bolt assembly for measuring preload and bearing preload measurement apparatus |
-
2012
- 2012-11-08 CN CN 201220585043 patent/CN202867482U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019232675A1 (en) * | 2018-06-04 | 2019-12-12 | 舍弗勒技术股份两合公司 | Screw bolt assembly for measuring preload and bearing preload measurement apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130410 |
|
| CX01 | Expiry of patent term |