CN213238836U - Support lug type linear displacement sensor or potentiometer based on joint bearing connection - Google Patents
Support lug type linear displacement sensor or potentiometer based on joint bearing connection Download PDFInfo
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- CN213238836U CN213238836U CN202022343610.5U CN202022343610U CN213238836U CN 213238836 U CN213238836 U CN 213238836U CN 202022343610 U CN202022343610 U CN 202022343610U CN 213238836 U CN213238836 U CN 213238836U
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- journal stirrup
- linear displacement
- lug
- displacement sensor
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Abstract
The utility model discloses a journal stirrup formula linear displacement sensor or potentiometre based on joint bearing connects, the first end of sensor or potentiometre main part is connected with the first end of pull rod, a journal stirrup is connected respectively with the second end of pull rod to the second end of sensor or potentiometre main part, the middle part of journal stirrup is equipped with the journal stirrup through-hole, two joint bearings install respectively in the journal stirrup through-hole of two journal stirrups, joint bearing's outer lane outer wall is connected with the pore wall in close contact with of the journal stirrup through-hole that corresponds, two joint bearing's inner circle through-hole is as two connecting holes of journal stirrup formula linear displacement sensor or potentiometre. The utility model discloses an install joint bearing on two lugs respectively, form the lug formula linear displacement sensor or the potentiometre of two joint bearing structures, utilize joint bearing's characteristic to overcome the direct drawback with the round pin hub connection of lug through-hole in the current structure, have intensity height, cooperation precision height, relative motion during more free and basically can not the advantage of wearing and tearing.
Description
Technical Field
The utility model relates to a journal stirrup formula linear displacement sensor or potentiometre especially relate to a journal stirrup formula linear displacement sensor or potentiometre based on joint bearing connects.
Background
With the development of miniaturization and informatization of products, electric servo mechanisms occupy a main position in more and more servo control systems, and linear displacement sensors or potentiometers for position feedback matched with the electric servo mechanisms are widely used. Among them, the support-lug linear displacement sensor or potentiometer is favored because of its simple use and easy installation.
As shown in fig. 1, a conventional lug type linear displacement sensor or potentiometer includes a sensor or potentiometer main body 1, a first end of the sensor or potentiometer main body 1 is connected to a first end of a pull rod 4, a second end of the sensor or potentiometer main body 1 and a second end of the pull rod 4 are respectively connected to a lug 2, a lug through hole 3 is formed in the middle of the lug 2 and serves as two connecting holes of the lug type linear displacement sensor or potentiometer and is respectively connected to two pin shafts in an electric servo mechanism, and the lug is driven to move linearly when the pin shafts move, so that the pull rod 4 follows up; in the follow-up process of the pull rod 4, different voltage values are output, and finally the position feedback function is achieved.
The above-mentioned conventional lug type linear displacement sensor or potentiometer has the following drawbacks:
because the axes of the two pin shafts of the electric servo mechanism cannot be absolutely parallel, a clearance fit design is needed between the support lug through hole 3 on the support lug 2 and the pin shaft of the electric servo mechanism to realize a self-adaptive function so as to overcome the problem that the two pin shafts are not parallel; because the only stress position of the product is at the support lug 2, and the weakest part is also at the support lug 2, when the distance from the support lug through hole 3 to the outer end of the support lug 2 is larger, the required gap is larger, and when the pin shaft moves, the gap needs to be eliminated firstly to drive the support lug 2 to move together, so that the phenomenon of output delay or inconsistent output can be caused, and the phenomenon of position feedback precision reduction or position feedback inaccuracy is caused; however, the smaller the distance between the support lug through hole 3 and the outer end of the support lug 2 is, the lower the strength of the sensor or the potentiometer is, and the poorer the mechanical environment adaptability is; therefore, the requirements cannot be satisfied simultaneously between the assembling accuracy and the product strength. Meanwhile, the relative motion of the two pin shafts is linear displacement, when the distance between the axes of the two pin shafts is unchanged, one pin shaft rotates around the axis of the other pin shaft, so that abrasion is generated, the gap is further increased, and the position feedback precision is reduced.
In addition, the pull rod 4 and the support lug 2 of the traditional support lug type linear displacement sensor or potentiometer are connected through threads, and the connecting structure causes the low strength of the connecting position and reduces the service life of the product.
SUMMERY OF THE UTILITY MODEL
The object of the present invention is to provide a trunnion type linear displacement sensor or potentiometer which can be connected with the pin shaft of the electric servo mechanism without gap between the trunnion and the pin shaft based on the knuckle bearing.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
the utility model provides a journal stirrup formula linear displacement sensor or potentiometre based on joint bearing connects, includes sensor or potentiometre main part, the first end of sensor or potentiometre main part is connected with the first end of pull rod, the second end of sensor or potentiometre main part with a journal stirrup is connected respectively to the second end of pull rod, the middle part of journal stirrup is equipped with the journal stirrup through-hole, and two joint bearings install respectively two in the journal stirrup through-hole of journal stirrup, joint bearing's outer lane outer wall with correspond the pore wall in close contact with of journal stirrup through-hole is connected, two joint bearing's inner circle through-hole conduct two connecting holes of journal stirrup formula linear displacement sensor or potentiometre.
The joint bearing is a spherical sliding bearing, the sliding contact surfaces of the joint bearing are an inner spherical surface and an outer spherical surface, the inner ring and the outer ring can rotate and swing at any angle when moving relatively, and the joint bearing has the characteristics of multidirectional rotation, high load capacity, impact resistance, corrosion resistance, wear resistance, self-aligning, good lubrication and the like.
Preferably, in order to facilitate stable installation of the knuckle bearing and maintain the support lug to have high strength, circular V-shaped grooves with V-shaped radial sections are respectively arranged on the support lug and close to the peripheries of the two ends of the support lug through hole, and the two ends of the knuckle bearing are respectively fixed by circular blank pressing formed by inward flanging of the inner side groove wall of the corresponding V-shaped groove after being pressed into the corresponding support lug through hole.
Preferably, in order to ensure the required strength of the support lug, the depth of the V-shaped groove is not more than one fourth of the length of the through hole of the support lug.
Preferably, in order to improve the connection strength between the pull rod and the corresponding support lug and prolong the service life of the product, the pull rod and the corresponding support lug are of an integrally formed structure.
The beneficial effects of the utility model reside in that:
the utility model discloses an install joint bearing on two lugs respectively, form the lug formula linear displacement sensor or the potentiometre of two joint bearing structures, utilize joint bearing's characteristic to overcome the direct drawback with the round pin hub connection of lug through-hole in the current structure, have following advantage: 1. the strength is high, and the requirement of 6000g of impact strength can be met through verification; 2. the matching precision is high, the knuckle bearing in the market has high enough precision, a user only needs to control the precision of the outer diameter of the pin shaft, and the size control precision of the outer diameter is easy to be improved to a higher height; 3. the joint bearing is free and basically free from abrasion during relative motion, when the distance between the axes of the two pin shafts is unchanged, one of the pin shafts rotates around the axis of the other pin shaft, the output voltage of a product cannot be changed, and the pin shafts and the product cannot be abraded basically because the joint bearing has a self-lubricating effect, and the service life of the joint bearing far exceeds the sliding life of the product.
The utility model discloses a set up "V" shape recess on the journal stirrup, do benefit to on the one hand and impress joint bearing in the journal stirrup through-hole and form interference fit, on the other hand is convenient for form the extremely high fixed mounting of ring shape blank pressing to joint bearing formation steadiness with the inside cell wall of "V" shape recess to the inside turn-ups, and simultaneously, "V" shape recess can reduce the reduction to journal stirrup intensity as far as possible, ensures that the journal stirrup has sufficient intensity to make behind the sensor potentiometre utensil have better mechanical environment adaptability.
Drawings
FIG. 1 is a schematic diagram of a conventional lug type linear displacement sensor or potentiometer;
fig. 2 is a schematic structural view of a support lug type linear displacement sensor or potentiometer based on joint bearing connection according to the present invention;
FIG. 3 is one of the enlarged cross-sectional views A-A of FIG. 2, in which the inner channel wall of the "V" shaped groove has been flanged inwardly to form a circular blank;
FIG. 4 is a second enlarged sectional view A-A of FIG. 2, in which the inner channel wall of the "V" shaped groove is not inwardly turned.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 2-4, the support lug type linear displacement sensor or potentiometer connected by the joint bearing of the present invention includes a sensor or potentiometer main body 1, a first end of the sensor or potentiometer main body 1 is connected to a first end of a pull rod 4, a support lug 2 is respectively connected to a second end of the sensor or potentiometer main body 1 and a second end of the pull rod 4, a support lug through hole (not marked in fig. 2-4) is formed in the middle of the support lug 2, the support lug through hole is larger than the support lug through hole 3 in fig. 1, two joint bearings 5 are respectively installed in the support lug through holes of the two support lugs 2, the outer wall of the outer ring of the joint bearing 5 is in close contact connection with the corresponding hole wall of the support lug through hole, and the through holes 6 of the two joint bearings 5 serve as two connection holes of the support lug type linear displacement sensor or potentiometer; preferably, the positions, close to the peripheries of the two ends of the lug through hole, of the lug 2 are respectively provided with a circular V-shaped groove 7 with a V-shaped radial section, and the two ends of the knuckle bearing 5 are respectively fixed by a circular blank pressing 8 formed by inward flanging of the inner side groove wall of the corresponding V-shaped groove 7 after being pressed into the corresponding lug through hole; the depth of the V-shaped groove 7 is not more than one fourth of the length of the lug through hole; the pull rod 4 and the corresponding support lug 2 are of an integrated structure.
As shown in fig. 2-4, when the knuckle bearing 5 is installed, the knuckle bearing 5 is forcibly pressed into the corresponding support lug through hole of the support lug 2 by press-in equipment or press-in tools, after the press-in, the V-shaped groove 7 is properly and adaptively deformed, the inner side groove wall of the V-shaped groove 7 is properly expanded outwards, an interference fit structure is realized, then the inner side groove wall of the V-shaped groove 7 is forcibly and inwards flanged by flanging equipment or flanging tools to form annular flanges 8, and the two annular flanges 8 respectively press the two ends of the corresponding knuckle bearing 5, so that the high-stability installation of the knuckle bearing 5 is realized.
When the servo mechanism is used, two pin shafts (not shown) of the electric servo mechanism respectively penetrate through inner ring through holes 6 of two joint bearings 5 to form an interference connection structure, and fault-tolerant displacement required by non-parallel axis centers of the two pin shafts of the electric servo mechanism is adaptively provided through multidirectional rotary motion between an inner ring and an outer ring of the joint bearing; the electric servo mechanism drives the pull rod 4 to do linear motion, the two pin shafts change at any position on a plane vertical to the axis of the pin shafts, the matching part of the pin shafts and the knuckle bearing 5 cannot be abraded, the output voltage of the sensor or the potentiometer is consistent and cannot be delayed, and the sensor or the potentiometer is ensured to have high position feedback precision.
The above-mentioned embodiment is only the preferred embodiment of the present invention, and is not to the limitation of the technical solution of the present invention, as long as the technical solution can be realized on the basis of the above-mentioned embodiment without creative work, all should be regarded as falling into the protection scope of the right of the present invention.
Claims (4)
1. The utility model provides a journal stirrup formula linear displacement sensor or potentiometre based on joint bearing connects, includes sensor or potentiometre main part, the first end of sensor or potentiometre main part is connected with the first end of pull rod, the second end of sensor or potentiometre main part with a journal stirrup is connected respectively to the second end of pull rod, the middle part of journal stirrup is equipped with journal stirrup through-hole, its characterized in that: the two knuckle bearings are respectively arranged in the lug through holes of the two lugs, the outer wall of the outer ring of each knuckle bearing is in close contact connection with the corresponding hole wall of the lug through hole, and the inner ring through holes of the two knuckle bearings are used as two connecting holes of the lug type linear displacement sensor or the potentiometer.
2. A knuckle bearing connection based trunnion type linear displacement sensor or potentiometer according to claim 1, wherein: the positions, close to the peripheries of the two ends of the support lug through hole, of the support lug are respectively provided with a V-shaped groove which is circular and has a V-shaped radial section, and the two ends of the knuckle bearing are respectively fixed by circular blank pressing formed by inward flanging of the inner side groove wall of the corresponding V-shaped groove after being pressed into the corresponding support lug through hole.
3. A knuckle bearing connection based journal stirrup linear displacement sensor or potentiometer according to claim 2, wherein: the depth of the V-shaped groove is not more than one fourth of the length of the lug through hole.
4. A knuckle bearing connection based trunnion type linear displacement sensor or potentiometer according to claim 1, 2 or 3, characterized in that: the pull rod and the corresponding support lug are of an integrally formed structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022343610.5U CN213238836U (en) | 2020-10-20 | 2020-10-20 | Support lug type linear displacement sensor or potentiometer based on joint bearing connection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022343610.5U CN213238836U (en) | 2020-10-20 | 2020-10-20 | Support lug type linear displacement sensor or potentiometer based on joint bearing connection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213238836U true CN213238836U (en) | 2021-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022343610.5U Active CN213238836U (en) | 2020-10-20 | 2020-10-20 | Support lug type linear displacement sensor or potentiometer based on joint bearing connection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213238836U (en) |
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2020
- 2020-10-20 CN CN202022343610.5U patent/CN213238836U/en active Active
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