CN205423469U - Pretension and locking mechanism of piezoelectric transducer - Google Patents
Pretension and locking mechanism of piezoelectric transducer Download PDFInfo
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- CN205423469U CN205423469U CN201620224494.6U CN201620224494U CN205423469U CN 205423469 U CN205423469 U CN 205423469U CN 201620224494 U CN201620224494 U CN 201620224494U CN 205423469 U CN205423469 U CN 205423469U
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Abstract
Pretension and locking mechanism of piezoelectric transducer, it relates to measures technical field, outer platform is for there being two hollow cuboid structures of opposite open -ended, interior platform and the piezoelectric material holding intracavity of all locating outer platform, the both ends of interior platform are connected with piezoelectric material through epoxy glue, piezoelectric material's one end is connected with the subplate through epoxy glue, outer platform inboard middle part is provided with blind groove, subplate and blind slot combination, the pretension post form by draw -in groove post, screw thread post, coaxial the connecting gradually of optical axis post, outer platform outside middle part be provided with the screw thread blind hole, outer platform and pretension post pass through the screw thread post and cooperate with the screw thread blind hole and be connected, the contact of optical axis post and subplate set up, the both sides of draw -in groove post be provided with the locking board, the lower surface of locking board passes through screw fixed connection with outer platform. The utility model discloses can realize the pretension and the locking function of piezoelectric transducer simultaneously, and the regulation of pretightning force size is convenient, stable, accurate.
Description
Technical field
This utility model relates to field of measuring technique, is specifically related to pretension and the locking gear of piezoelectric transducer.
Background technology
Piezoelectric transducer has that response band width, highly sensitive, signal to noise ratio be big, simple in construction, reliable operation, lightweight, there's almost no the advantages such as hysteresis, it is obtained for application widely at aspects such as various dynamic force, acceleration, the measurement of mechanical shock and vibration, and acoustics, medical science, mechanics, aerospace.Piezoelectric transducer is that the direct piezoelectric effect utilizing piezoelectric is made, operation principle is: when piezoelectric along certain orientation by External Force Acting time, inside just produces polarization phenomena, just produces the electric charge that symbol is contrary simultaneously, and the quantity of electric charge is directly proportional to the size of external force on two end face；When force direction changes, the polarity of electric charge changes the most therewith；After external force is removed, return to again uncharged state.
All of piezoelectric transducer the most all must have certain pretension, namely in some way it is applied initial precompression, its objective is: (1) eliminates the gap of contact surface inside and outside sensor, improves the rigidity of sensor elastic system, thus obtains good static and dynamic performance；(2) by regulation pretightning force size, the linearity and the sensitivity of sensor can be adjusted.Operation principle based on piezoelectric transducer, its pre-tightening apparatus must is fulfilled for following 4 requirements: (1) is applicable not only to static measurement process, is also applied for kinetic measurement process, possesses locking locking functions；(2) applying of pretightning force and easy to adjust, stable, accurate；(3) simple in construction, compact, easily realizes mounting or dismounting；(4) do not affect the measurement process of sensor itself, and load sharing is not measured.
Traditional pre-tension method of piezoelectric transducer is that through piezoelectric, centre bolt (attaching nut) is loaded precompression, its advantage is that the size adjustment of pretightning force is convenient, but owing to preload piece is in parallel with piezoelectric rigidity, so load sharing effect will necessarily be produced, the most measured can not very be delivered on sensing element, some consumes in the elastic deformation of preload piece；And, easily produce relative rotation between screw pair, cause coupling to loosen." a kind of locking plate for screw retention " of Patent No. 201220742215.7 discloses a kind of two ends and respectively arranges the locking plate of a dodecagon bolt hole, the nut of matched bolt is just placed in above-mentioned hole, and such bolt cannot be in bolt hole inner rotation." stop nut and possess the coupling unit of stop nut " of Patent No. 201180025535.9 discloses a kind of stop nut and possesses the coupling unit of stop nut, stop nut is coupling between bolt and general nut, for preventing loosening of described screw bolt and nut.But, when by above-mentioned two invention be used for the pretension of piezoelectric transducer and locking time but exist pretightning force regulation difficulty deficiency.In summary, current prior art can't realize the pretension of piezoelectric transducer and locking simultaneously, it is impossible to meeting 4 requirements of its pre-tightening apparatus, this makes the performance of such measuring instrument be extremely difficult to intended high, precision and frontier target.
Utility model content
The purpose of this utility model is the defect for prior art and deficiency, it is provided that a kind of simple in construction, the pretension of piezoelectric transducer reasonable in design, easy to use and locking gear.
For achieving the above object, the technical solution adopted in the utility model is: it comprises inner platform, outer platform, piezoelectric, subplate, pretension post, latch, screw；Described inner platform is rectangular structure；Described outer platform is the hollow rectangular structure having two opposite open；Described inner platform and piezoelectric are all located in the containing cavity of outer platform, the two ends of inner platform are connected by epoxide-resin glue piezoelectric, one end of piezoelectric is connected by epoxide-resin glue has subplate, outer platform middle inside to be provided with blind slot, and subplate coordinates with blind slot；Described pretension post is coaxially connected in sequence by draw-in groove post, threaded post, light jack-post；The outer middle side part of described outer platform is provided with tapped blind hole, and outer platform is connected with tapped blind hole by threaded post with pretension post；Described light jack-post contacts setting with subplate；The both sides of described draw-in groove post are provided with latch, and the lower surface of latch is connected by screw is fixing with outer platform.
As preferably, described draw-in groove post is provided with the four layers of draw-in groove equidistantly distributed up and down.
As preferably, the diameter of described light jack-post is consistent with the major diameter of thread of threaded post, and more than the external diameter of draw-in groove post.
During this utility model operation, step 1: unlock, a screw on all latch is back-outed, another screw is unscrewed, will transfer to from the draw-in groove of draw-in groove post in the middle part of latch simultaneously；Step 2: fine setting pretension post, tightens or unscrews the threaded post of two pretension posts, until it reaches pretightning force area requirement and a certain lower surface of layer draw-in groove on draw-in groove post is alignd with the outer surface of outer platform；Step 3: locking, by the draw-in groove of draw-in groove post of dragging in the middle part of all latch, tightens all screws simultaneously.
After using said structure, what this utility model produced has the beneficial effect that
1, can realize pretension and the locking functions of piezoelectric transducer simultaneously, and pretightning force size is easy to adjust, stable, accurate；
2, pre-tightening apparatus does not affect the measurement process of piezoelectric transducer and follow-up resolving, there is not load sharing effect and additional forces.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model；
Fig. 2 is the structure chart of this utility model pretension post 5.
Description of reference numerals:
Inner platform 1, outer platform 2, piezoelectric 3, subplate 4, pretension post 5, draw-in groove post 51, threaded post 52, light jack-post 53, draw-in groove 54, latch 6, screw 7.
Detailed description of the invention
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Referring to as shown in Fig. 1 Fig. 2, this detailed description of the invention adopts the following technical scheme that it comprises inner platform 1, outer platform 2, piezoelectric 3, subplate 4, pretension post 5, latch 6, screw 7；Described inner platform 1 is rectangular structure；Described outer platform 2 is the hollow rectangular structure having two opposite open；Described inner platform 1 and piezoelectric 3 are all located in the containing cavity of outer platform 2, the two ends of inner platform 1 are connected by epoxide-resin glue piezoelectric 3, one end of piezoelectric 3 is connected by epoxide-resin glue has subplate 4, outer platform 2 middle inside to be provided with blind slot, and subplate 4 coordinates with blind slot；Described pretension post 5 is coaxially connected in sequence by draw-in groove post 51, threaded post 52, light jack-post 53；The described outer middle side part of outer platform 2 is provided with tapped blind hole, and outer platform 2 is connected with tapped blind hole by threaded post 52 with pretension post 5；Described light jack-post 53 contacts setting with subplate 4；The both sides of described draw-in groove post 51 are provided with latch 6, and the lower surface of latch 6 is connected by screw 7 is fixing with outer platform 2.
As preferably, described draw-in groove post 51 is provided with the four layers of draw-in groove 54 equidistantly distributed up and down.
As preferably, the diameter of described light jack-post 53 is consistent with the major diameter of thread of threaded post 52, and more than the external diameter of draw-in groove post 51.
During the operation of this detailed description of the invention, step 1: unlock, a screw on all latch is back-outed, another screw is unscrewed, will transfer to from the draw-in groove of draw-in groove post in the middle part of latch simultaneously；Step 2: fine setting pretension post, tightens or unscrews the threaded post of two pretension posts, until it reaches pretightning force area requirement and a certain lower surface of layer draw-in groove on draw-in groove post is alignd with the outer surface of outer platform；Step 3: locking, by the draw-in groove of draw-in groove post of dragging in the middle part of all latch, tightens all screws simultaneously.
This detailed description of the invention is in practical work process: when measuring object and being force signal, input quantity acts on inner platform 1；When measuring object and being acceleration signal, input quantity acts on outer platform 2.
After using said structure, what this detailed description of the invention produced has the beneficial effect that
1, can realize pretension and the locking functions of piezoelectric transducer simultaneously, and pretightning force size is easy to adjust, stable, accurate；
2, pre-tightening apparatus does not affect the measurement process of piezoelectric transducer and follow-up resolving, there is not load sharing effect and additional forces.
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description, principle of the present utility model is simply described; on the premise of without departing from this utility model spirit and scope; this utility model also has various changes and modifications, in the range of these changes and improvements both fall within claimed this utility model.This utility model claims scope and is defined by appending claims and equivalent thereof.
Claims (3)
1. the pretension of piezoelectric transducer and locking gear, it is characterised in that: it comprises inner platform, outer platform, piezoelectric, subplate, pretension post, latch, screw；Described inner platform is rectangular structure；Described outer platform is the hollow rectangular structure having two opposite open；Described inner platform and piezoelectric are all located in the containing cavity of outer platform, the two ends of inner platform are connected by epoxide-resin glue piezoelectric, one end of piezoelectric is connected by epoxide-resin glue has subplate, outer platform middle inside to be provided with blind slot, and subplate coordinates with blind slot；Described pretension post is coaxially connected in sequence by draw-in groove post, threaded post, light jack-post；The outer middle side part of described outer platform is provided with tapped blind hole, and outer platform is connected with tapped blind hole by threaded post with pretension post；Described light jack-post contacts setting with subplate；The both sides of described draw-in groove post are provided with latch, and the lower surface of latch is connected by screw is fixing with outer platform.
The pretension of piezoelectric transducer the most according to claim 1 and locking gear, it is characterised in that: it is provided with the four layers of draw-in groove equidistantly distributed up and down on described draw-in groove post.
The pretension of piezoelectric transducer the most according to claim 1 and locking gear, it is characterised in that: the diameter of described light jack-post is consistent with the major diameter of thread of threaded post, and more than the external diameter of draw-in groove post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224494.6U CN205423469U (en) | 2016-03-23 | 2016-03-23 | Pretension and locking mechanism of piezoelectric transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620224494.6U CN205423469U (en) | 2016-03-23 | 2016-03-23 | Pretension and locking mechanism of piezoelectric transducer |
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| Publication Number | Publication Date |
|---|---|
| CN205423469U true CN205423469U (en) | 2016-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620224494.6U Withdrawn - After Issue CN205423469U (en) | 2016-03-23 | 2016-03-23 | Pretension and locking mechanism of piezoelectric transducer |
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| Country | Link |
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| CN (1) | CN205423469U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673657A (en) * | 2016-03-23 | 2016-06-15 | 南京林业大学 | Pretightening and looseness-preventing mechanism for piezoelectric sensor |
-
2016
- 2016-03-23 CN CN201620224494.6U patent/CN205423469U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105673657A (en) * | 2016-03-23 | 2016-06-15 | 南京林业大学 | Pretightening and looseness-preventing mechanism for piezoelectric sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160803 Effective date of abandoning: 20170728 |