CN202867494U - Bolt provided with pretightening force detecting rotary head - Google Patents
Bolt provided with pretightening force detecting rotary head Download PDFInfo
- Publication number
- CN202867494U CN202867494U CN 201220585168 CN201220585168U CN202867494U CN 202867494 U CN202867494 U CN 202867494U CN 201220585168 CN201220585168 CN 201220585168 CN 201220585168 U CN201220585168 U CN 201220585168U CN 202867494 U CN202867494 U CN 202867494U
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- China
- Prior art keywords
- bolt
- rotary head
- pin
- hole
- fixed
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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
A bolt provided with a pretightening force detecting rotary head comprises the bolt, the detecting rotary head, a fixed bar, a spring, a fixed pin and an adhesion agent. A stepped hole, the fixed pin and an adjusting pin hole are arranged on the axial center of the bolt. The detecting rotary head is provided with a swing arm and an adjusting pin. The fixed bar is provided with a boss and a screw cap. The fixed bar is arranged inside the stepped hole. The adhesion agent is used for fixedly connecting the end head of the fixed bar and the stepped hole. The detecting rotary head is arranged on the boss of the fixed bar in a sleeved mode. The fixed pin is embedded into the fixed pin hole. The spring is arranged between the adjusting pin and the fixed pin. According to the bolt provided with the pretightening force detecting rotary head, the position of the detecting rotary head is observed through naked eyes, and reduction or failure of pretightening force of the bolt can be found as soon as possible. The bolt provided with the pretightening force detecting rotary head 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 pretightening force detection rotary head.
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 pretightening force detection rotary head that provides for the deficiencies in the prior art, the utility model detects the displacement of rotary head by naked-eye observation, 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 pretightening force detection rotary head, its characteristics comprise bolt, detect rotary head, fixing rod, spring, fixing pin and Bond, the axle center of described bolt is provided with step hole, step hole is made of fixed hole, transitional pore and shallow counterbore, the end face of the shallow counterbore of bolt is provided with fixed pin holes and regulates pin-and-hole, detecting rotary head is the ring part that is provided with swing arm, and swing arm is provided with adjustment pin, and fixing rod is the rod member that an end is provided with boss and nut; Described fixing rod is located in the step hole, its rod member termination embeds in the fixed hole of step hole, Bond is connected fixing rod rod member termination and fixed hole, detecting rotary head is sleeved on the boss of fixing rod, and between the counterbore of the nut of fixing rod and bolt, fixing pin is embedded in the fixed pin holes of bolt, and spring is located between the adjustment pin and fixing pin of swing arm.
The utility model can find early that by the position of naked-eye observation detection rotary head the pretightening force of bolt reduces or inefficacy, 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 plan view of Fig. 1;
Fig. 3 is the plan view of the utility model bolt.
Embodiment
Consult Fig. 1, Fig. 2, Fig. 3, the utility model comprises bolt 1, detects rotary head 2, fixing rod 3, spring 5, fixing pin 6 and Bond 4, the axle center of described bolt 1 is provided with step hole, step hole is made of fixed hole 12, transitional pore 13 and shallow counterbore 14, the end face of bolt 1 shallow counterbore 14 is provided with fixed pin holes 15 and regulates pin-and-hole 16, detect rotary head 2 for being provided with the ring part of swing arm 21, swing arm 21 is provided with adjustment pin 22, and fixing rod 3 is the rod member that an end is provided with boss 32 and nut 31; Described fixing rod 3 is located in the step hole, its rod member termination embeds in the fixed hole 12 of step hole, Bond 4 is connected fixing rod 3 rod member terminations and fixed hole 12, detecting rotary head 2 is sleeved on the boss 32 of fixing rod 3, and between the counterbore 14 of the nut 31 of fixing rod 3 and bolt 1, fixing pin 6 is embedded in the fixed pin holes 15 of bolt 1, and spring 5 is located between the adjustment pin 22 and fixing pin 6 of swing arm 21.
The assembling of dispatching from the factory of the present utility model:
The rod end of fixing rod 3 is inserted in the step hole of bolt 1, fixed hole 12 in itself and the step hole is press-fitted, and be connected with Bond 4, be through on the boss 32 of fixing rod 3 detecting rotary head 2, and put on nut 31, make and detect rotary head 2 between the counterbore 14 of the nut 31 of fixing rod 3 and bolt 1, fixing pin 6 is embedded in the fixed pin holes 15 of bolt 1, spring 5 is connected between the adjustment pin 22 and fixing pin 6 of swing arm 21, at this moment, detecting rotary head 2 can rotate, under the effect of spring 5, the swing arm 21 that detects rotary head 2 is pulled to position near fixing pin 6 by spring 5, keeps a less angle between swing arm 21 and the fixing pin 6, of the present utility model dispatch from the factory to assemble finish.
The utility model is to use like this:
After 1 pair of mechanical parts enforcement of bolt is fastening, under the effect of clamping force, bolt 1 produces stress and corresponding axial strain, because the rod end of fixing rod 3 is fixed in the fixed hole 12 of step hole, when bolt 1 produces the strain elongation, fixing rod 3 does not stress, do not extend yet, and the axial distance between the shallow counterbore 14 of the nut 31 of fixing rod 3 and bolt 1 reduces, at this moment, stir detection rotary head 2 with hand, overcome spring 5 pulling force, make the swing arm 21 that detects rotary head 2 towards the position movement away from fixing pin 6, when the adjustment pin 22 that detects rotary head 2 when adjusting pin-and-hole 16 on the bolt 1 aligns, regulate adjustment pin 22, the termination of adjustment pin 22 is connected in the adjusting pin-and-hole 16, at this moment, keep a larger angle between swing arm 21 and the fixing pin 6, expression bolt 1 has been tightened, is in normal working; Otherwise, when bolt 1 generation is loosening, reduce and even disappear with clamping force, the axial strain that bolt 1 produces disappears, cause fixing rod 3 nut 31 and the axial distance between the shallow counterbore 14 of bolt 1 become large, at this moment, owing to detect the restriction that rotary head 2 is subjected to fixing rod 3 boss 32, make adjustment pin 22 terminations that are connected in the adjusting pin-and-hole 16 from regulating in the pin-and-hole 16, under the pulling force effect of spring 5, make the swing arm 21 that detects rotary head 2 towards the position movement near fixing pin 6, at this moment, the angle between swing arm 21 and the fixing pin 6 diminishes, by observing the variation of angle between swing arm 21 and the fixing pin 6, can judge whether bolt 1 is loosening, and whether working state is normal.
For ease of observing and read the changing value of angle between swing arm 21 and the fixing pin 6, the utility model is provided with scale value at bolt 1 end face.
Claims (1)
1. one kind is provided with the bolt that pretightening force detects rotary head, it is characterized in that it comprises bolt (1), detect rotary head (2), fixing rod (3), spring (5), fixing pin (6) and Bond (4), the axle center of described bolt (1) is provided with step hole, step hole is by fixed hole (12), transitional pore (13) and shallow counterbore (14) consist of, the end face of the shallow counterbore of bolt (1) (14) is provided with fixed pin holes (15) and regulates pin-and-hole (16), detect rotary head (2) for being provided with the ring part of swing arm (21), swing arm (21) is provided with adjustment pin (22), and fixing rod (3) is the rod member that an end is provided with boss (32) and nut (31); Described fixing rod (3) is located in the step hole, its rod member termination embeds in the fixed hole (12) of step hole, Bond (4) is connected fixing rod (3) rod member termination and fixed hole (12), detecting rotary head (2) is sleeved on the boss (32) of fixing rod (3), and be positioned between the counterbore (14) of the nut (31) of fixing rod (3) and bolt (1), fixing pin (6) is embedded in the fixed pin holes (15) of bolt (1), and spring (5) is located between the adjustment pin (22) and fixing pin (6) of swing arm (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220585168 CN202867494U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting rotary head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220585168 CN202867494U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting rotary head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202867494U true CN202867494U (en) | 2013-04-10 |
Family
ID=48034216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220585168 Expired - Lifetime CN202867494U (en) | 2012-11-08 | 2012-11-08 | Bolt provided with pretightening force detecting rotary head |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202867494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571504A (en) * | 2018-05-08 | 2018-09-25 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
-
2012
- 2012-11-08 CN CN 201220585168 patent/CN202867494U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108571504A (en) * | 2018-05-08 | 2018-09-25 | 上海威纳工程技术有限公司 | Accurate pretension bolt |
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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 |