CN217847575U - Shaft sleeve type rotating wire-wound potentiometer - Google Patents
Shaft sleeve type rotating wire-wound potentiometer Download PDFInfo
- Publication number
- CN217847575U CN217847575U CN202220989842.4U CN202220989842U CN217847575U CN 217847575 U CN217847575 U CN 217847575U CN 202220989842 U CN202220989842 U CN 202220989842U CN 217847575 U CN217847575 U CN 217847575U
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- reed
- axle sleeve
- rotating shaft
- diameter section
- wall
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Abstract
The utility model discloses a shaft sleeve type rotating wire-wound potentiometer, including pivot, coil winding, reed, lead terminal, axle sleeve, insulating base, spacing rotor and insulating support, the axle sleeve includes axle sleeve major diameter section and axle sleeve minor diameter section, and axle sleeve minor diameter section is passed in the pivot, and spacing rotor suit is in the pivot, and insulating support suit is in the pivot, and the reed is installed on insulating support and its reed contact and coil winding contact, and a plurality of lead terminals are installed on insulating base and are connected with coil winding and reed are electrically conductive respectively. The utility model discloses a cancellation bearing and apron replace traditional shell with the axle sleeve, set up axle sleeve path section and pivot cooperation to carry out the axial spacing and circumference spacing to the pivot through setting up spacing revolving fragment, thereby satisfy product function demand under showing the prerequisite that reduces potentiometer axial dimension and volume, and eliminated the installation moment because of the unnecessary moment that the installation bearing produced and the machining error product, make this potentiometer satisfy little turning moment's application requirement.
Description
Technical Field
The utility model relates to a rotatory line is around potentiometre especially relates to a axle sleeve type rotatory line is around potentiometre.
Background
With the development of miniaturization and precision of industrial control systems, position feedback potentiometers used in combination with the industrial control systems are also widely used. Among them, the wire-wound potentiometer is preferred because of its small temperature coefficient of resistance, excellent output precision characteristics, stable and reliable performance, and easy use, and among them, the rotary wire-wound potentiometer is most used.
The shell and the apron of traditional rotatory wire-wound potentiometre are connected, install the bearing between pivot and shell and the apron respectively, and there is following defect in this kind of structure: the axial size is difficult to have more space reduction because of two bearings, so that the volume of the potentiometer is larger, and the potentiometer is difficult to apply in occasions with higher requirements on volume miniaturization; the concentricity of the shell, the cover plate and the rotating shaft is required to be higher, and the actual processing is difficult to meet the requirement, so the rotating moment of the traditional rotating wire-wound potentiometer is about 3mN.m generally, and if the required rotating moment is less than 1mN.m, the extremely high processing precision and the manufacturing cost are required.
In summary, the conventional rotary wire-wound potentiometer is difficult to meet the application requirements of small size and high requirement on low rotation torque due to the structural reasons of the shell, the cover plate and the bearing.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solve the above problems and to provide a sleeve-type rotary wire-wound potentiometer without a cover plate and a bearing.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a shaft sleeve type rotary wire-wound potentiometer comprises a rotating shaft, a coil winding, a reed, a lead terminal, a shaft sleeve, an insulating base, a limiting rotor plate and an insulating support, wherein the shaft sleeve provided with a central through hole comprises a shaft sleeve large-diameter section and a shaft sleeve small-diameter section which are connected with each other and are integrally formed, the outer diameter and the inner diameter of the large-diameter section of the shaft sleeve are respectively larger than the outer diameter and the inner diameter of the small-diameter section of the shaft sleeve, the insulating base is arranged at one end of the large-diameter section of the shaft sleeve, which is far away from the small-diameter section of the shaft sleeve, the inner side of the insulating base is provided with a base counter bore, and the base counter bore and the inner cavity of the large-diameter section of the shaft sleeve jointly form a working inner cavity, the rotating shaft penetrates through the small-diameter section of the shaft sleeve, the inner end of the rotating shaft is arranged in the working inner cavity, the annular coil winding is arranged in the sunken hole of the base, the limiting rotary plate is sleeved on the rotating shaft through a central through hole of the limiting rotary plate and is positioned in the working inner cavity, the insulating support is sleeved on the rotating shaft through a blind hole of the insulating support and is positioned in the working inner cavity, the reed is arranged on the insulating support, a reed contact of the reed is contacted with the radial inner wall of the coil winding, a plurality of lead terminals are arranged on the insulating base and are respectively connected with the coil winding and the reed in an electric conduction way, the inner wall of the large-diameter section of the shaft sleeve is provided with an axial limiting block for axially limiting the limiting rotor plate and a circumferential limiting block for circumferentially limiting the limiting rotor plate, the part of the limiting rotor plate close to the peripheral edge is positioned between the axial limiting block and the cavity wall at one end of the large-diameter section of the shaft sleeve close to the small-diameter section of the shaft sleeve, the outer peripheral wall of the limiting rotary piece is provided with a convex limiting lug, and the limiting lug can be blocked by the circumferential limiting block in the rotating process.
Preferably, in order to transmit signals collected by the reeds to corresponding lead terminals conveniently, the number of the lead terminals is three, the two lead terminals used as a positive pole and a negative pole of a power supply are respectively connected with two ends of the coil winding through wires, the lead terminals used as the signal collection are connected with one end of a conductive connecting sheet, the conductive connecting sheet is arranged at the hole bottom of a counter bore of the base of the insulating base, the reed contacts comprise a first reed contact and a second reed contact which are in conductive connection with each other, the first reed contact is in contact with the radial inner wall of the coil winding, and the second reed contact is in close elastic contact with the surface of the conductive connecting sheet.
As preferred, install on insulating support for the ease of making the reed and reliable and stable, insulating support is last to be close to the one end of reed is equipped with the installation bulge loop of evagination, the reed includes an opening ring shape reed body, first reed contact with second reed contact respectively with this body coupling of opening ring shape reed and integrated into one piece, be equipped with a plurality of sawtooth on the inner wall of opening ring shape reed body and through these a plurality of sawtooth with the outer wall in close contact with of installation bulge loop, the opening both ends of opening ring shape reed body respectively through the rivet with insulating support is fixed.
Preferably, in order to reliably mount the limiting rotating plate and prevent the limiting rotating plate from rotating, a rotating shaft convex ring protruding outwards is arranged on the rotating shaft, rotating shaft limiting planes are respectively arranged on two opposite sides of the outer wall of the rotating shaft convex ring, rotating plate limiting planes are respectively arranged on two opposite sides of the hole wall of a central through hole of the limiting rotating plate, the central through hole of the limiting rotating plate is sleeved on the rotating shaft convex ring, and the two rotating shaft limiting planes are respectively in surface-to-surface contact with the two corresponding rotating plate limiting planes.
Preferably, in order to quickly position and mount the limiting rotary piece and the insulating support, a rotary shaft groove is formed in the position, close to the rotary shaft convex ring, of the rotary shaft, between the rotary shaft convex ring and the insulating support, a clamping ring is clamped in the rotary shaft groove, and the part, close to the peripheral edge, of the clamping ring is simultaneously arranged on the limiting rotary piece and in the corresponding groove in the insulating support.
Preferably, in order to facilitate fine adjustment of the axial position of the limiting rotor plate, an adjusting washer is arranged between the limiting rotor plate and the wall of one end cavity, close to the small-diameter section of the shaft sleeve, of the large-diameter section of the shaft sleeve, and the adjusting washer is sleeved on the rotating shaft through a center through hole of the adjusting washer.
Preferably, in order to better prevent the insulating support from rotating, a plurality of axial racks uniformly distributed along the circumferential direction are arranged on the outer wall of the rotating shaft corresponding to the insulating support and are in close contact connection with the wall of the blind hole of the insulating support through the plurality of axial racks.
Preferably, in order to reduce the rotation resistance of the rotating shaft relative to the shaft sleeve and improve the sealing and dustproof effects, a rotating shaft annular groove is formed in the outer wall, corresponding to the small-diameter section of the shaft sleeve, of the rotating shaft, and sealing grease is filled in the rotating shaft annular groove.
The beneficial effects of the utility model reside in that:
the utility model discloses a cancel bearing and apron, replace traditional shell with the axle sleeve, set up axle sleeve path section and pivot cooperation, can fill lubricating oil between pivot and axle sleeve, or carry out high accuracy location to pivot and axle sleeve through other equipment, thereby do not influence the rotation function of pivot for the axle sleeve, and carry out the axial spacing and circumference spacing to the pivot through setting up spacing revolving fragment, thereby satisfy the product function demand under showing the prerequisite that reduces potentiometer axial dimension and volume, and the mode that utilizes reed contact and coil winding inner wall contact has eliminated the influence of no bearing back product axial clearance to the output, the installation moment of unnecessary moment and the machining error product because of installation bearing produces has been eliminated simultaneously, make the rotation moment of this potentiometer can be less than 1mN.m, satisfy the application requirement of little rotation moment.
Drawings
Fig. 1 is a schematic sectional view of the shaft sleeve type rotary wire-wound potentiometer according to the present invention;
fig. 2 is a schematic perspective view of the shaft sleeve type rotary wire-wound potentiometer according to the present invention before the assembly of the rotating shaft, the limiting rotating piece, the retainer ring and the insulating bracket;
fig. 3 is a schematic view of the assembled front view cross-sectional structure of the rotating shaft, the limiting rotating piece, the retainer ring and the insulating bracket of the shaft sleeve type rotating wire-wound potentiometer according to the present invention;
fig. 4 is a schematic view of the assembled structure of the rotating shaft, the limiting rotating piece, the retainer ring, the insulating support and the spring plate of the shaft sleeve type rotating wire-wound potentiometer according to the present invention;
fig. 5 is a left side view structural schematic diagram of the assembled insulating bracket and reed of the shaft sleeve type rotary wire-wound potentiometer of the present invention;
fig. 6 is a schematic side view of the spring plate and the coil winding of the sleeve-type rotary wire-wound potentiometer according to the present invention;
fig. 7 is a schematic sectional view of the insulating base, lead terminal and coil winding of the sleeve-type rotary wire-wound potentiometer according to the present invention;
fig. 8 is a right side view structural diagram of the insulation base, lead terminal and coil winding of the sleeve-type rotary wire-wound potentiometer according to the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1-8, the sleeve-type rotary wire-wound potentiometer of the present invention comprises a rotary shaft 12, a coil winding 5, a reed 4, a lead terminal 1, a shaft sleeve, an insulating base 3, a limiting rotor 8 and an insulating support 6, wherein the shaft sleeve with a central through hole comprises a shaft sleeve large diameter section 2 and a shaft sleeve small diameter section 10 which are connected with each other and integrally formed, the outer diameter and the inner diameter of the shaft sleeve large diameter section 2 are respectively larger than the outer diameter and the inner diameter of the shaft sleeve small diameter section 10, the insulating base 6 is disposed at one end of the shaft sleeve large diameter section 2 far away from the shaft sleeve small diameter section 10, the inner side of the insulating base 3 is provided with a base counter bore (not marked in the figure) which forms a working inner cavity (not marked in the figure) together with the inner cavity of the shaft sleeve large diameter section 2, the rotary shaft 12 passes through the shaft sleeve small diameter section 10 and the inner end thereof is disposed in the working inner cavity, the coil winding 5 in a circular shape is mounted in the base counter bore, the limiting rotor plate 8 is sleeved on the rotating shaft 12 through a central through hole 16 of the limiting rotor plate 8 and is positioned in the working inner cavity, the insulating support 6 is sleeved on the rotating shaft 12 through a blind hole of the insulating support 6 and is positioned in the working inner cavity, the reed 4 is installed on the insulating support 6, a reed contact of the reed is contacted with the radial inner wall of the coil winding 5, a plurality of lead terminals 1 are installed on the insulating base 3 and are respectively in conductive connection with the coil winding 5 and the reed 4, an axial limiting block (not marked in the figure) for axially limiting the limiting rotor plate 8 and a circumferential limiting block (not visible in the figure) for circumferentially limiting the limiting rotor plate 8 are arranged on the inner wall of the large-diameter section 2 of the shaft sleeve, the part close to the peripheral edge of the limiting rotor plate 8 is positioned between the axial limiting block and the wall of one end cavity close to the small-diameter section 10 of the shaft sleeve on the large-diameter section 2 of the shaft sleeve, the outer peripheral wall of the limiting rotary piece 8 is provided with a convex limiting lug 17, and the limiting lug 17 can be blocked by the circumferential limiting block in the rotating process.
As shown in fig. 1-8, the present invention further discloses the following various more specific optimized structures, which can be combined with one or more structures to form a more optimized technical solution.
In order to transmit signals collected by the reed 4 to the corresponding lead terminals 1, the number of the lead terminals 1 is three, wherein the two lead terminals 1 used as a positive pole and a negative pole of a power supply are respectively connected with two ends of the coil winding 5 through leads, the lead terminals 1 used as signal collection are connected with one end of a conductive connecting sheet 23, the conductive connecting sheet 23 is arranged at the bottom of a counterbore of the base of the insulating base 3, the reed contacts comprise a first reed contact 21 and a second reed contact 19 which are mutually conductively connected, the first reed contact 21 is in contact with the radial inner wall of the coil winding 5, and the second reed contact 19 is in close elastic contact with the surface of the conductive connecting sheet 23.
In order to facilitate the manufacture of the reed 4 and stably and reliably install the reed on the insulating support 6, a convex installation convex ring 18 is arranged at one end, close to the reed 4, of the insulating support 6, the reed 4 comprises an opening circular ring-shaped reed body (not marked in the figure), a first reed contact 21 and a second reed contact 19 are respectively connected with the opening circular ring-shaped reed body and are integrally formed, a plurality of sawteeth 20 are arranged on the inner wall of the opening circular ring-shaped reed body and are in close contact with the outer wall of the installation convex ring 18 through the plurality of sawteeth 20, and two ends of an opening of the opening circular ring-shaped reed body are respectively fixed with the insulating support 6 through rivets 22.
In order to reliably mount the limiting rotor plate 8 and prevent the limiting rotor plate from rotating, an outward-protruding rotating shaft convex ring 13 is arranged on the rotating shaft 12, rotating shaft limiting planes (not marked in the figure) are respectively arranged on two opposite sides of the outer wall of the rotating shaft convex ring 13, rotor plate limiting planes (not marked in the figure) are respectively arranged on two opposite sides of the hole wall of a central through hole 16 of the limiting rotor plate 8, the central through hole 16 of the limiting rotor plate 8 is sleeved on the rotating shaft convex ring 13, and the two rotating shaft limiting planes are in surface-to-surface contact with the corresponding surfaces of the two rotor plate limiting planes respectively.
In order to quickly position and mount the limiting rotary piece 8 and the insulating support 6, a rotary shaft groove (not marked in the figure) is arranged on the rotary shaft 12, which is positioned between the rotary shaft convex ring 13 and the insulating support 6 and is close to the rotary shaft convex ring 13, the clamping ring 7 is clamped in the rotary shaft groove, and the part of the clamping ring 7, which is close to the peripheral edge, is simultaneously arranged on the limiting rotary piece 8 and in the corresponding groove on the insulating support 6.
In order to facilitate fine adjustment of the axial position of the limiting rotor plate 8, an adjusting washer 9 is arranged between the limiting rotor plate 8 and the wall of one end cavity of the large-diameter section 2 of the shaft sleeve, which is close to the small-diameter section 10 of the shaft sleeve, and the adjusting washer 9 is sleeved on the rotating shaft 12 through a central through hole of the adjusting washer.
In order to better prevent the insulating support 6 from rotating, a plurality of axial racks 15 which are uniformly distributed along the circumferential direction are arranged on the outer wall of the rotating shaft 12 corresponding to the insulating support 6, and the rotating shaft is in close contact connection with the wall of the blind hole of the insulating support 6 through the plurality of axial racks 15.
In order to reduce the rotating resistance of the rotating shaft 12 relative to the shaft sleeve and improve the sealing and dustproof effects, two rotating shaft circular grooves 11 are arranged on the outer wall of the rotating shaft 12 corresponding to the shaft sleeve small-diameter section 10, and sealing grease is filled in the rotating shaft circular grooves 11.
As shown in fig. 1-8, in use, the outer end of the rotating shaft 12 is connected to a rotating member (not shown) of the device under test, two of the lead terminals 1 connected to the coil winding 5 are respectively used as power input terminals, and the other lead terminal 1 is used as a signal output terminal, the rotating member of the device under test drives the rotating shaft 12 to rotate, the rotating shaft 12 drives the limiting rotating plate 8, the insulating support 6 and the reed 4 to rotate synchronously, the first reed contact 21 of the reed 4 slides in contact with the inner wall of the coil winding 5 to obtain a changed electrical signal, and the electrical signal is transmitted to the corresponding lead terminal 1 through the second reed contact 19 and the conductive connecting sheet 23 of the reed 4, thereby realizing the angular displacement detection function of the rotating member under test.
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 (8)
1. The utility model provides a shaft sleeve type rotation wire-wound potentiometer, includes pivot, coil winding, reed and lead terminal, its characterized in that: still include axle sleeve, insulating base, spacing rotor and insulating support, be equipped with central through-hole the axle sleeve includes interconnect and integrated into one piece's axle sleeve major diameter section and axle sleeve minor diameter section, the external diameter and the internal diameter of axle sleeve major diameter section are greater than respectively the external diameter and the internal diameter of axle sleeve minor diameter section, insulating base arranges in keep away from in the axle sleeve major diameter section the one end of axle sleeve minor diameter section, insulating base's inboard be equipped with base counter bore and this base counter bore with the inner chamber of axle sleeve major diameter section forms the work inner chamber jointly, the pivot is passed axle sleeve minor diameter section and its inner end are put in the work inner chamber, be annular coil winding install in the base counter bore, spacing rotor is through self central through-hole suit in the pivot and be located in the work inner chamber, insulating support is through self blind hole suit in the pivot and be located in the work inner chamber, the reed is installed on the insulating support and its reed contact with the radial inner wall contact of coil winding, a plurality of lead terminal install on the insulating base and respectively with coil winding with electrically conductive connection, the axle sleeve is equipped with spacing rotor is used for spacing rotor is close to spacing stopper in the axial direction rotor wall of spacing rotor.
2. The shaft sleeve type rotary wire-wound potentiometer according to claim 1, characterized in that: the coil winding is characterized in that the number of the lead terminals is three, the two lead terminals used as a positive pole and a negative pole of a power supply are respectively connected with two ends of the coil winding through leads, the lead terminals used for signal acquisition are connected with one end of a conductive connecting sheet, the conductive connecting sheet is arranged at the bottom of a counter bore of a base of the insulating base, the reed contacts comprise a first reed contact and a second reed contact which are mutually in conductive connection, the first reed contact is in contact with the radial inner wall of the coil winding, and the second reed contact is in close elastic contact with the surface of the conductive connecting sheet.
3. The shaft sleeve type rotary wire-wound potentiometer according to claim 2, characterized in that: be close to on the insulating support the one end of reed is equipped with the installation bulge loop of evagination, the reed includes an opening ring shape reed body, first reed contact with second reed contact respectively with this body coupling of opening ring shape reed and integrated into one piece, be equipped with on the inner wall of opening ring shape reed body a plurality of sawtooth and through these a plurality of sawtooth with the outer wall in close contact with of installation bulge loop, the opening both ends of opening ring shape reed body respectively through the rivet with insulating support is fixed.
4. The sleeve-type rotary wire-wound potentiometer according to claim 1, 2 or 3, characterized in that: the rotating shaft convex ring is provided with an outward protrusion in the rotating shaft, two opposite sides on the outer wall of the rotating shaft convex ring are respectively provided with a rotating shaft limiting plane, two opposite sides of the hole wall of the central through hole of the limiting rotor are respectively provided with a rotor limiting plane, the central through hole of the limiting rotor is sleeved on the rotating shaft convex ring and is provided with two rotating shaft limiting planes which are respectively in surface-to-surface contact with the corresponding surfaces of the rotor limiting planes.
5. The shaft sleeve type rotary wire-wound potentiometer according to claim 4, characterized in that: and a rotating shaft groove is arranged on the rotating shaft between the rotating shaft convex ring and the insulating support and close to the rotating shaft convex ring, the clamping ring is clamped in the rotating shaft groove, and the part, close to the peripheral edge, of the clamping ring is simultaneously arranged on the limiting rotating sheet and in the corresponding groove on the insulating support.
6. The shaft sleeve type rotary wire-wound potentiometer according to claim 5, characterized in that: and an adjusting washer is arranged between the limiting rotor plate and the wall of one end cavity of the large-diameter section of the shaft sleeve, which is close to the small-diameter section of the shaft sleeve, and the adjusting washer is sleeved on the rotating shaft through a central through hole of the adjusting washer.
7. The sleeve-type rotary wire-wound potentiometer according to claim 1, 2 or 3, characterized in that: and a plurality of axial racks which are uniformly distributed along the circumferential direction are arranged on the outer wall of the rotating shaft corresponding to the insulating support and are in close contact connection with the wall of the blind hole of the insulating support through the plurality of axial racks.
8. The sleeve-type rotary wire-wound potentiometer according to claim 1, 2 or 3, characterized in that: and a rotary shaft circular groove is formed in the outer wall of the rotary shaft corresponding to the small-diameter section of the shaft sleeve, and sealing grease is filled in the rotary shaft circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220989842.4U CN217847575U (en) | 2022-04-26 | 2022-04-26 | Shaft sleeve type rotating wire-wound potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220989842.4U CN217847575U (en) | 2022-04-26 | 2022-04-26 | Shaft sleeve type rotating wire-wound potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217847575U true CN217847575U (en) | 2022-11-18 |
Family
ID=84017114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220989842.4U Active CN217847575U (en) | 2022-04-26 | 2022-04-26 | Shaft sleeve type rotating wire-wound potentiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217847575U (en) |
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2022
- 2022-04-26 CN CN202220989842.4U patent/CN217847575U/en active Active
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