CN214672059U - Sealed pull rod type potentiometer - Google Patents
Sealed pull rod type potentiometer Download PDFInfo
- Publication number
- CN214672059U CN214672059U CN202120260772.4U CN202120260772U CN214672059U CN 214672059 U CN214672059 U CN 214672059U CN 202120260772 U CN202120260772 U CN 202120260772U CN 214672059 U CN214672059 U CN 214672059U
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- pull rod
- hole
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- end cover
- end cap
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Abstract
The utility model discloses a canned type pull rod formula potentiometre, first end cover is connected with the first end of casing, the pull rod passes the through-hole on the first end cover, the base is connected with the second end of casing, wire on the resistive element passes the through-hole on the base, install the X shape sealing washer with pull rod in close contact with in being equipped with the annular groove on the pore wall of first end cover and this annular groove, install O shape sealing washer between first end cover and the casing, be equipped with radial sealed end cap in the base, sealed end cap is equipped with axial end cap through-hole, the wire is connected with transmission conductor series connection electrically conductively, transmission conductor passes the end cap through-hole, it has insulating sealing material to fill between the pore wall of transmission conductor and end cap through-hole. The utility model discloses showing the whole sealing performance who has improved pull rod formula potentiometre, having waterproof, grease proofing function, the potentiometre can directly invade in the hydraulic oil, when being applied to hydraulic servo, can bear the pressure of 20MPa aviation hydraulic oil, makes its application more extensive and reliable.
Description
Technical Field
The utility model relates to a pull rod formula potentiometre especially relates to a canned type pull rod formula potentiometre with totally enclosed effect.
Background
The potentiometer is more and more widely applied to a servo system, and has the function of converting the position of an actuating mechanism into an electric signal which can be identified by a controller, and the controller judges the real-time position of the actuating mechanism according to the electric signal and sends a control instruction, so that closed-loop control is realized. In some high-power hydraulic servo systems, a pull rod type potentiometer is generally used as a position detection device of an actuating mechanism.
The conventional pull rod type potentiometer is of an open structure, as shown in fig. 1, and comprises an end cover 1, a shell 2, a zero set screw 3, a pull rod 4, a resistor body 5, an electric brush 6, a screw 7, a base 8 and a lead 9, wherein the end cover 1 and the shell 2 are fixed through threaded connection, the resistor body 5 is fixed through the zero set screw 3, the base 8 and the shell 2 are fixed through the screw 7, and the lead 9 is led out from the resistor body 5 through the base 8. When the end cover works, the inner hole of the end cover 1 is used for sliding guide of the pull rod 4, the pull rod 4 drives the electric brush 6 to slide on the resistor body 5, and output voltage at the corresponding position is fed back and transmitted to an external controller through the lead 9.
The conventional pull rod type potentiometer has the following disadvantages: because the pull rod 4 is in a motion state when working, the pull rod 4 and the end cover 1 are in clearance fit in design; when the lead 9 passes through the base 8 to be led out, the sealing of the two materials cannot be realized due to the difference of the materials between the outer layer of the lead 9 and the base 8; therefore, the integral sealing performance is poor, the water-proof and oil-proof functions are not provided, the potentiometer cannot directly invade hydraulic oil, and the potentiometer can only be separated from the hydraulic oil cavity by adopting a physical isolation method during system design, so that the application of the potentiometer is limited.
SUMMERY OF THE UTILITY MODEL
The purpose of the present invention is to provide a waterproof and oil-proof sealed pull rod potentiometer with high sealing efficiency to solve the above problems.
The utility model discloses a following technical scheme realizes above-mentioned purpose:
a sealed pull-rod potentiometer includes a first end cap, a housing, a pull rod, a resistor, a brush, a base and a lead, the first end cover is connected with the first end of the shell, the pull rod penetrates through a through hole on the first end cover to be connected with the electric brush arranged in the shell, the base is connected with the second end of the shell, the lead on the resistor body passes through the through hole on the base, an annular groove is arranged on the hole wall of the first end cover, an X-shaped sealing ring which is tightly contacted with the pull rod is arranged in the annular groove, an O-shaped sealing ring is arranged between the first end cover and the shell, a radial sealing plug is arranged in the base, the sealing plug is provided with an axial plug through hole, the lead is in series conductive connection with the transmission conductor, the transmission conductor penetrates through the plug through hole, and an insulating sealing material is filled between the transmission conductor and the hole wall of the plug through hole.
Preferably, the insulating sealing material is a glass insulator in order to improve sealing and insulating properties.
Preferably, in order to further improve the sealing effect, the X-shaped seal rings are two axially arranged.
Preferably, in order to further improve the sealing effect, a zero set screw is arranged on the resistor body, the zero set screw is arranged in a corresponding zero set hole in the shell, and an adhesive is filled in the zero set hole.
Preferably, in order to facilitate connection between the housing and the base and installation of the transmission conductor, the second end of the housing is connected to the base through a second end cap, and O-ring seals are respectively installed between the second end cap and the housing and between the second end cap and the base.
The beneficial effects of the utility model reside in that:
the utility model discloses a set up X shape sealing washer between pull rod and first end cover, set up O shape sealing washer between casing and first end cover, set up sealed end cap and draw forth the wire through seal installation's transmission conductor in the base, showing the whole sealing performance who has improved pull rod formula potentiometre, waterproof, grease proofing function have, the potentiometre can directly invade in the hydraulic oil, when being applied to hydraulic servo system, can bear the pressure of 20MPa aviation hydraulic oil, the potentiometre can normally work, make its application more extensive and reliable.
Drawings
FIG. 1 is a front view of a conventional pull rod potentiometer in half section;
fig. 2 is a front view of the sealing pull rod potentiometer in half section.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings:
as shown in fig. 2, the sealed pull rod potentiometer of the present invention includes a first end cap 10, a housing 17, a pull rod 15, a resistor 16, a brush 18, a second end cap 19, a base 24, a transmission conductor 22 and a lead 21, wherein the first end cap 10 is connected to a first end of the housing 17, the pull rod 15 passes through a through hole of the first end cap 10 and is connected to the brush 18 disposed in the housing 17, the second end of the housing 17 is connected to the base 24 through a second end cap 19 and a connection screw 20, the lead 21 of the resistor 16 passes through holes of the second end cap 19 and the base 24, two axially arranged annular grooves are disposed on a hole wall of the first end cap 10, X-shaped seal rings 11 tightly contacting with the pull rod 15 are disposed in the two annular grooves, O-shaped seal rings 12 are disposed between the first end cap 10 and the housing 17, between the second end cap 19 and the housing 17, and between the second end cap 19 and the base 24, a radial sealing plug is arranged in the base 24, the sealing plug is provided with an axial plug through hole, the lead 21 is in series conductive connection with the transmission conductor 22, the transmission conductor 22 penetrates through the plug through hole, an insulating sealing material 23 is filled between the transmission conductor 22 and the wall of the plug through hole, and the insulating sealing material 23 is a glass insulator; the resistor body 16 is provided with a zero set screw 13, the zero set screw 13 is arranged in a corresponding zero set hole on the shell 17, and the zero set hole is filled with an adhesive 14.
As shown in fig. 2, the sealing structure of the sealed pull rod type potentiometer includes: an X-shaped sealing ring 11 between the first end cover 10 and the pull rod 15, an O-shaped sealing ring 12 between the first end cover 10 and the shell 17, an adhesive 14 filled in a zeroing hole on the shell 17, an O-shaped sealing ring 12 between the second end cover 19 and the base 24, and an insulating sealing material 23 filled between the transmission conductor 22 and a sealing plug in the base 24; therefore, a full-sealing structure is formed, and the sealing performance of the potentiometer is obviously improved.
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 (5)
1. A sealed pull rod potentiometer, comprising a first end cap, a housing, a pull rod, a resistor, a brush, a base and a lead, wherein the first end cap is connected to a first end of the housing, the pull rod passes through a through hole in the first end cap to be connected to the brush disposed in the housing, the base is connected to a second end of the housing, and the lead on the resistor passes through the through hole in the base, the sealed pull rod potentiometer comprising: the pull rod is arranged in the first end cover, an annular groove is formed in the hole wall of the first end cover, an X-shaped sealing ring in close contact with the pull rod is arranged in the annular groove, an O-shaped sealing ring is arranged between the first end cover and the shell, a radial sealing plug is arranged in the base, an axial plug through hole is formed in the sealing plug, the wire is in series connection with the transmission conductor in a conductive connection mode, the transmission conductor penetrates through the plug through hole, and insulating sealing materials are filled between the transmission conductor and the hole wall of the plug through hole.
2. The sealed pull-rod potentiometer according to claim 1, wherein: the insulating sealing material is a glass insulator.
3. The sealed pull-rod potentiometer according to claim 1, wherein: the X-shaped sealing rings are two in axial arrangement.
4. The sealed pull rod potentiometer according to claim 1, 2, or 3, wherein: the resistance body is provided with a zero set screw, the zero set screw is arranged in a corresponding zero set hole on the shell, and an adhesive is filled in the zero set hole.
5. The sealed pull rod potentiometer according to claim 1, 2, or 3, wherein: the second end of the shell is connected with the base through a second end cover, and O-shaped sealing rings are respectively arranged between the second end cover and the shell and between the second end cover and the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120260772.4U CN214672059U (en) | 2021-01-29 | 2021-01-29 | Sealed pull rod type potentiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120260772.4U CN214672059U (en) | 2021-01-29 | 2021-01-29 | Sealed pull rod type potentiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214672059U true CN214672059U (en) | 2021-11-09 |
Family
ID=78519504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120260772.4U Active CN214672059U (en) | 2021-01-29 | 2021-01-29 | Sealed pull rod type potentiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214672059U (en) |
-
2021
- 2021-01-29 CN CN202120260772.4U patent/CN214672059U/en active Active
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