CN210322101U - Full-sealed shaft pin type sensor - Google Patents
Full-sealed shaft pin type sensor Download PDFInfo
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- CN210322101U CN210322101U CN201921316329.3U CN201921316329U CN210322101U CN 210322101 U CN210322101 U CN 210322101U CN 201921316329 U CN201921316329 U CN 201921316329U CN 210322101 U CN210322101 U CN 210322101U
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- shaft pin
- sealed
- pin body
- sealing plate
- hole
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Abstract
The utility model discloses a totally enclosed shaft pin type sensor, which comprises a shaft pin body, wherein a middle hole coaxial with the shaft pin body is formed in the shaft pin body, and a circuit board and four strain gauges are installed in the middle hole; two annular grooves are formed in the outer wall of the shaft pin body. The utility model discloses design into the structure of through-hole double ring groove with the pivot body, this kind of structure can not influence the use at the both ends laser welding closing plate of through-hole, so can reach IP68 omniseal.
Description
Technical Field
The utility model relates to the technical field of sensors, specifically a totally enclosed axle round pin formula sensor.
Background
Almost all current shaft pin type sensors are strain type sensors with a double-shear beam structure, as shown in fig. 1, the structure is simple to process and convenient to produce, but due to structural reasons, a strain gauge and a circuit thereof are usually sealed in a stress area by adhering a silica gel to a cover plate, the silica gel sealing mode can only reach IP66, when the shaft pin type sensor is used outdoors, the silica gel can not completely achieve a full sealing effect due to rain and snow weather and humidity influence, however, the shaft pin type sensor is used outdoors in many application occasions, so the shaft pin type sensor with the structure can not achieve a long service life, and the problem is a fatal weakness.
At present, if the cover plate is not adhered by silica gel and the laser welding cover plate is used as a full seal, the strain of the sensor can be greatly influenced by the cover plate, the sensor can not normally work due to the influence, and therefore the sensor is sealed.
SUMMERY OF THE UTILITY MODEL
The technique that exists is not enough to the aforesaid, the utility model aims at providing a totally enclosed axle pin formula sensor, through structural design, designs into the structure of through-hole both sides ring channel with the pivot body, and this kind of structure can not influence the use at the both ends laser welding closing plate of through-hole, so can reach IP68 totally enclosed.
In order to solve the technical problem, the utility model adopts the following technical scheme:
the utility model provides a totally enclosed shaft pin type sensor, which comprises a shaft pin body, wherein a middle hole coaxial with the shaft pin body is formed in the shaft pin body, and a circuit board and four strain gauges are installed in the middle hole;
two annular grooves are formed in the outer wall of the shaft pin body, each annular groove corresponds to two strain gauges, and the strain gauges are fixed on the hole wall of the middle hole corresponding to the annular groove.
Preferably, the two ends of the shaft pin body are respectively provided with a first sealing plate and a second sealing plate in a sealing manner, the central position of the second sealing plate is sealed with a wire pipe, the wire pipe is communicated with the middle hole, and the circuit board is fixed on the hole wall of the middle hole close to the second sealing plate.
Preferably, the first sealing plate and the second sealing plate are made of stainless steel, and the first sealing plate and the second sealing plate are welded on the shaft pin body through laser.
The beneficial effects of the utility model reside in that: the utility model discloses design into the structure of through-hole double ring groove with the pivot body, this kind of structure can not influence the use at the both ends laser welding sealed plate board of through-hole, paste the foil gage in downthehole positive and negative strain concentration area, all circuit parts can bury downtheholely, just so formed one and met an emergency pivot sensor, then sealed with two stainless steel sealed plate board laser welding, this has just carried out the full-enclosed processing to foil gage and circuit, complete sealing has been accomplished, this kind of is sealed can reach IP68 grade, can use in the open air completely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a prior art spindle pin sensor;
fig. 2 is a schematic structural diagram of a fully sealed shaft-pin sensor according to the present invention;
fig. 3 is a partial perspective view of a fully sealed pivot pin sensor in accordance with the present invention;
fig. 4 is a front view of a hermetically sealed pin sensor of the present invention;
fig. 5 is a first stress distribution diagram of the fully sealed shaft-pin sensor according to the present invention when deformed by a force;
fig. 6 is a second stress distribution diagram of the fully sealed shaft-pin sensor of the present invention when deformed by a force;
fig. 7 is a stress distribution diagram three when the fully sealed shaft-pin sensor of the present invention is deformed by force.
Description of reference numerals: 1-shaft pin body, 11-annular groove, 2-first sealing plate, 3-second sealing plate, 31-line pipe, 4-circuit board and 5-strain gauge.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, a fully-sealed shaft-pin sensor comprises a shaft-pin body 1, wherein a central hole coaxial with the shaft-pin body 1 is formed in the shaft-pin body 1, and a circuit board 4 and four strain gauges 5 are installed in the central hole;
the outer wall of the shaft pin body 1 is provided with two annular grooves 11, when the sensor deforms under stress, a tangential stress is generated at the annular grooves 11, and 2 positive stresses and 2 negative stresses are generated at the 2 annular grooves 11, so that 4 strains required by a Wheatstone bridge are just formed, and as shown in the following fig. 5 to fig. 6, the two annular grooves are respectively two positive strain concentration areas A and two negative strain concentration areas B; four strain gauges 5 are distributed and attached in positive and negative strain concentration areas in the central hole, so that each annular groove 11 corresponds to two strain gauges 5, and the strain gauges 5 are fixed on the hole wall of the central hole at the position corresponding to the annular groove 11.
Furthermore, a first sealing plate 2 and a second sealing plate 3 are respectively arranged at two ends of the shaft pin body 1 in a sealing manner, a line pipe 31 is sealed at the center position of the second sealing plate 3, the line pipe 31 is communicated with the middle hole, and the circuit board 4 is fixed on the hole wall of the middle hole close to the second sealing plate 3; the first sealing plate 2 and the second sealing plate 3 are made of stainless steel, and the first sealing plate 2 and the second sealing plate 3 are welded on the shaft pin body 1 through laser.
As shown in fig. 3, the circuit board 4 is fixed on the inner wall of the central hole close to the second sealing plate 3, the circuit board 4 and the strain gauge 5 can be sealed in the central hole by using the first sealing plate 2 and the second sealing plate 3, and the first sealing plate 2 and the second sealing plate 3 are not contacted with the strain gauge 5, so that the strain gauge 5 is not influenced; can draw the electric wire through the spool 31 that sets up on second closing plate 3 and link to each other with the external world, wherein spool 31 can adopt stainless steel and fix on second closing plate 3 through laser welding's mode, can pour into sealed glue into at the junction of electric wire in spool 31 and seal, and then make this sensor obtain better sealed effect and reach IP68 grade, can use in the open air completely.
When the sensor is used, the sensor is the same as the existing strain type sensor with a double-shear beam structure in mounting mode, a circuit board 4 of the sensor is connected with four strain gauges 5 through electric wires, the electric wires on the circuit board 4 extend out of a second sealing plate 3 through a wire tube 31 to be connected with the outside (the specific connection mode of the strain gauges and the circuit board and the specific connection mode of the electric wires on the circuit board and the outside are the prior art, and the description is not repeated in the application), and the four strain gauges 5 are respectively adhered to four strain concentration areas according to the illustration in fig. 5 to 7.
The utility model discloses design into the structure of through-hole double ring groove with the pivot body, this kind of structure can not influence the use at the both ends laser welding sealed plate board of through-hole, paste the foil gage in downthehole positive and negative strain concentration area, all circuit parts can bury downtheholely, just so formed one and met an emergency pivot sensor, then sealed with two stainless steel sealed plate board laser welding, this has just carried out the full-enclosed processing to foil gage and circuit, complete sealing has been accomplished, this kind of is sealed can reach IP68 grade, can use in the open air completely.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (3)
1. A fully-sealed shaft pin type sensor comprises a shaft pin body and is characterized in that a middle hole coaxial with the shaft pin body is formed in the shaft pin body, and a circuit board and four strain gauges are installed in the middle hole;
two annular grooves are formed in the outer wall of the shaft pin body, each annular groove corresponds to two strain gauges, and the strain gauges are fixed on the hole wall of the middle hole corresponding to the annular groove.
2. The fully sealed shaft pin sensor according to claim 1, wherein the shaft pin body is provided at both ends thereof with a first sealing plate and a second sealing plate, respectively, and a central portion of the second sealing plate is sealed with a conduit, the conduit is communicated with the central hole, and the circuit board is fixed on a wall of the central hole close to the second sealing plate.
3. The hermetically sealed pintle sensor of claim 2, wherein the first and second seal plates are each stainless steel, and wherein the first and second seal plates are laser welded to the pintle body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316329.3U CN210322101U (en) | 2019-08-14 | 2019-08-14 | Full-sealed shaft pin type sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921316329.3U CN210322101U (en) | 2019-08-14 | 2019-08-14 | Full-sealed shaft pin type sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210322101U true CN210322101U (en) | 2020-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921316329.3U Active CN210322101U (en) | 2019-08-14 | 2019-08-14 | Full-sealed shaft pin type sensor |
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| Country | Link |
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| CN (1) | CN210322101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811714A (en) * | 2020-07-15 | 2020-10-23 | 中国船舶工业集团公司第七0八研究所 | Device for measuring radial force of pin shaft of water jet propulsion steering and backing mechanism |
-
2019
- 2019-08-14 CN CN201921316329.3U patent/CN210322101U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111811714A (en) * | 2020-07-15 | 2020-10-23 | 中国船舶工业集团公司第七0八研究所 | Device for measuring radial force of pin shaft of water jet propulsion steering and backing mechanism |
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