CN214445574U - Sensor of automatic measurement control instrument suitable for bearing inner diameter detection - Google Patents
Sensor of automatic measurement control instrument suitable for bearing inner diameter detection Download PDFInfo
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- CN214445574U CN214445574U CN202023217861.5U CN202023217861U CN214445574U CN 214445574 U CN214445574 U CN 214445574U CN 202023217861 U CN202023217861 U CN 202023217861U CN 214445574 U CN214445574 U CN 214445574U
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- 238000005259 measurement Methods 0.000 title claims abstract description 29
- 238000001514 detection method Methods 0.000 title claims abstract description 15
- 230000007246 mechanism Effects 0.000 claims abstract description 48
- 210000000078 claw Anatomy 0.000 claims abstract description 35
- 239000000696 magnetic material Substances 0.000 claims description 4
- 238000003754 machining Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The utility model discloses a sensor of an automatic measurement control instrument suitable for bearing inner diameter detection, which comprises a measuring mechanism and a shell assembled with the measuring mechanism, wherein the measuring mechanism comprises a support, a measuring lever and a guide rail seat which are symmetrically arranged at two sides of the support; the two measuring levers are step-shaped and comprise a first step provided with a magnetic core seat or a coil seat and a second step; the measuring claw mechanism comprises 2 single measuring claw mechanisms symmetrically arranged, each single measuring claw mechanism comprises a guide rail, a spring support and a measuring rod connecting mechanism, and the guide rail of each measuring claw mechanism is fixedly connected with a guide rail seat of the measuring device. The utility model discloses can be used for the internal diameter of automatic measurement control appearance with the bearing to great size to detect, convert the distance that detects into the signal of telecommunication, through the grinding machine is fed back to the progress of automatic measurement control appearance with processing, the machining speed of grinding machine adjustment grinding apparatus to guarantee the machining precision.
Description
Technical Field
The utility model relates to a sensor, concretely relates to sensor of automatic measurement control appearance suitable for bearing internal diameter detects.
Background
When the grinding machine is used for processing the inner ring of the bearing, the automatic measurement controller is required to detect the inner diameter of the bearing in processing on the one hand, the progress of processing is fed back to the grinding machine on the one hand, the grinding machine adjusts the processing speed of a grinding tool to ensure the processing precision, the automatic measurement controller comprises a control part and a sensor, and the sensor can convert the detected distance into an electric signal.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sensor of automatic measurement control appearance suitable for bearing internal diameter detects can be used for the automatic measurement control appearance in order to detect the internal diameter of bearing, converts the distance that detects into the signal of telecommunication, through the automatic measurement control appearance feeds back the progress of processing to the grinding machine, and the grinding machine adjusts the machining speed of grinding apparatus to guarantee the machining precision; the technical scheme is as follows:
a sensor suitable for an automatic measurement control instrument for bearing inner diameter detection comprises a measuring device and a measuring claw mechanism, wherein the measuring device comprises a measuring mechanism and a shell assembled with the measuring mechanism, the measuring mechanism comprises a support, a measuring lever and a guide rail seat, and the measuring lever and the guide rail seat are symmetrically arranged on two sides of the support; the two measuring levers are step-shaped and comprise a first step provided with a magnetic core seat or a coil seat and a second step; the second step of the measuring lever, the guide rail seat and the support are connected through a U-shaped elastic piece, the second step of the measuring lever and the guide rail seat are connected with the same branch of the U-shaped elastic piece, the support is connected with the other branch of the U-shaped elastic piece, the measuring lever and the support are positioned on one side of an opening of the U-shaped elastic piece, and the guide rail seat is positioned on one side of the back of the U-shaped elastic piece; the magnetic core seat and the coil seat are oppositely arranged; a tension coil is arranged on the shell at a position corresponding to the first step of the measuring lever; one end of the guide rail seat is connected with the U-shaped elastic piece, and the other end of the guide rail seat extends out of the outer side of the shell; the coil on the coil holder and the coil on the coil holder are both connected with wires and extend out of the shell; a locking plate is arranged on one side, close to the tension coil, of the measuring lever, and the locking plate is made of soft magnetic materials; the measuring claw mechanism comprises 2 single measuring claw mechanisms which are symmetrically arranged, each single measuring claw mechanism comprises a guide rail, a spring support and a measuring rod connecting mechanism, one side of each spring support is provided with a sliding groove which is matched and connected with the guide rail, the other side of each spring support is connected with one end of each measuring rod connecting mechanism, the other end of each measuring rod connecting mechanism extends outwards, the other end of each measuring rod connecting mechanism is connected with a measuring rod, and the tail end of each measuring rod is connected with a measuring claw; the sliding groove is perpendicular to the moving direction of the guide rail, the direction of the measuring rod and the direction of the measuring claw; and the guide rail of the measuring claw mechanism is fixedly connected with the guide rail seat of the measuring device.
When the two measuring bars are close to each other, the distance between the two measuring levers is increased, and when the distance between the two measuring bars is increased, the two measuring levers are close to each other.
The measuring lever is of a step type, the second step of the measuring lever is opposite to the first step of the measuring lever is deviated to the outer side, the distance between the second steps of the two measuring levers determines the distance between the two guide rail seats under the condition that the size and the structure of the shell are not changed, the measuring lever is arranged to be of the step type, the distance between the two guide rail seats is increased, the distance between the measuring rods respectively connected with the two guide rail seats is increased, and the inner diameter of the bearing which can be applied to is increased.
The inner sides of the first steps of the two measuring levers are respectively connected with a magnetic core seat with a magnetic core and a coil seat with a coil, and the magnetic core seat and the coil seat are arranged oppositely.
The locking plate positioned outside the first step of the measuring lever is made of soft magnetic materials, and is magnetized and attracted when a magnetic field is nearby, and demagnetized and not attracted when the magnetic field nearby disappears. The material of the locking plate can be electrician pure iron.
Preferably, a positioning screw is arranged between one side of the support close to the magnetic core holder and the coil holder and the first step of the measuring lever, so that the coil holder and the magnetic core holder are prevented from being crushed by extrusion.
And a spring is connected between the measuring levers on one side and two sides of the support, which are close to the magnetic core seat and the coil seat, so that the power for enabling one ends of the magnetic core seat or the coil seat to be close to each other on the two measuring levers is increased, and the measuring levers are convenient to reset.
U type elastic component includes whole spring, and the material is the spring steel, the thickness that plays the position of elastic action in the middle of the whole spring is 0.4mm, and the tensile number of times that resets that can bear reaches 500 ten thousand times, long service life.
The guide rail seat is convenient for being connected with an external guide rail, the measuring rod is connected with the measuring lever through the guide rail and the guide rail seat, the distance between the two measuring rods is convenient to adjust, the bearing inner diameter in a certain range is suitable, and the universality is high.
The spring support is preferable, the spring support comprises a first U-shaped frame close to the guide rail and a second U-shaped frame far away from the guide rail, the U-shaped frame comprises U-shaped frame supporting legs and connecting parts of the U-shaped frame supporting legs, the opening directions of the two U-shaped frames are perpendicular to each other, the two U-shaped frames are integrally arranged, the U-shaped frame connecting parts of the first U-shaped frame are the U-shaped frame supporting legs of the second U-shaped frame, sliding grooves opposite to the opening directions are formed in the U-shaped frame supporting legs of the first U-shaped frame, and the opening directions of the second U-shaped frame are parallel to the moving direction of the guide rail along the sliding grooves in the first U-shaped frame.
Preferably, the measuring rod connecting mechanism is an elbow, one end of the elbow is connected with one end, which is close to the connecting part of the U-shaped frame, of the U-shaped leg, which is far away from the guide rail, on the second U-shaped frame, and a fine adjustment screw is arranged at one end, which is far away from the connecting part of the U-shaped frame, of the U-shaped leg, which is connected with the elbow, on the second U-shaped frame; and when the fine adjustment screw is adjusted to enable one end, far away from the connecting part of the U-shaped frame, of the second U-shaped frame to be close to the guide rail, one end, close to the connecting part of the U-shaped frame, of the second U-shaped frame is slightly expanded outwards, and the measuring rod connected with the elbow is also deviated accordingly.
Preferably, the sliding groove in the first U-shaped frame is a V-shaped groove, and the guide rail is connected with the V-shaped groove in a matched mode.
Preferably, the opening directions of the two second U-shaped frames are arranged in opposite directions, the measuring rod is connected with the inner side ends of the two elbows, or the opening directions of the two second U-shaped frames are arranged in opposite directions, and the measuring rod is connected with the outer side ends of the two elbows.
Preferably, the guide rail is I-shaped, and two ends of the I-shaped structure on one side of the guide rail, which is close to the spring support, extend outwards to form a splayed shape.
The utility model has the advantages that:
1) the automatic measuring and controlling device can be used for detecting the inner diameter of a bearing with a larger size, converting the detected distance into an electric signal, feeding back the processing progress to the grinding machine through the control part of the automatic measuring and controlling device, and adjusting the processing speed of the grinding tool by the grinding machine so as to ensure the processing precision;
2) the U-shaped elastic part comprises an integral spring, the service life is long, the stretching and resetting times reach 500 ten thousand, and the service life of the integral device is determined;
3) the measuring rod carries out coarse adjustment through the movement of the spring support on the guide rail, the distance between the two measuring claws can be quickly adjusted, and after the measuring claws enter the bearing inner ring, the measuring claws are finely adjusted through the fine adjustment screw to be abutted against the bearing inner ring.
Drawings
Fig. 1 is a schematic structural diagram of a sensor of an automatic measurement controller suitable for detecting the inner diameter of a bearing according to the present invention;
FIG. 2 is a top view of FIG. 1;
fig. 3 is a schematic structural diagram of the measuring device according to the present invention;
fig. 4 is a schematic structural diagram of a measuring mechanism according to the present invention;
FIG. 5 is a schematic view of one manner of attachment of the measuring lever to the integral spring and rail mount;
fig. 6 is another schematic structural diagram of the sensor of the automatic measurement controller suitable for bearing inner diameter detection according to the present invention.
In the figure: 1. the measuring device comprises a shell, 2, an integral spring, 3, a guide rail seat, 4, a magnetic core seat, 5, a support, 6, a positioning screw, 7, a spring, 8, a first step of a measuring lever, 9, a second step of the measuring lever, 10, a locking plate, 11, a winding and unwinding coil seat, 12, a lifting ring screw, 13, a locknut, 14, a lifting ring, 15, a coil seat, 16, a second U-shaped frame, 17, an elbow, 18, a fine adjustment screw, 19, a measuring rod, 20, a measuring claw, 21, a guide rail, 22 and a first U-shaped frame.
Detailed Description
The sensor of the automatic measurement controller suitable for bearing inner diameter detection of the present invention is further described with reference to fig. 1 to 5, and the sensor for the automatic measurement controller comprises a measuring device and a measuring claw mechanism.
Referring to fig. 3 to 5, the measuring device includes a measuring mechanism and a housing 1 for assembling with the measuring mechanism, the measuring mechanism includes a support 5, a measuring lever and a guide rail seat 3 symmetrically disposed at two sides of the support 5; the two measuring levers are of a step type and comprise a first step 8 and a second step 9, wherein the first step 8 is provided with a magnetic core seat 4 or a coil seat 15; the second step 9 of the measuring lever, the guide rail seat 3 and the support 5 are connected through a U-shaped integral spring 2, the second step 9 of the measuring lever and the guide rail seat 3 are connected with the same branch of the U-shaped integral spring 2, the support 5 is connected with the other branch of the U-shaped integral spring 2, the measuring lever and the support 5 are positioned on one side of an opening of the U-shaped integral spring 2, and the guide rail seat 3 is positioned on one side of the back of the U-shaped integral spring 2; the magnetic core seat 4 and the coil seat 15 are oppositely arranged, a magnetic core is arranged in the magnetic core seat 4, and a coil is arranged in the coil seat 15; a winding and unwinding coil holder 11 is arranged on the shell 1 corresponding to the first step 8 of the measuring lever, and a coil is arranged in the winding and unwinding coil holder 11; one end of the guide rail seat 3 is connected with the U-shaped integral spring 2, and the other end of the guide rail seat extends out of the shell 1 and is connected with a guide rail 21 of the measuring claw mechanism; the coil on the coil holder and the coil on the coil holder are both connected with wires, extend out of the shell 1 and are connected with a control part of an automatic measurement controller; one side of the measuring lever, which is close to the tension coil, is provided with a locking plate 10, and the locking plate 10 is made of soft magnetic materials.
When the two guide rail seats 3 are close to each other, the distance between the first steps 8 of the two measuring levers is increased, and when the distance between the two guide rail seats 3 is increased, the first steps 8 of the two measuring levers are close to each other.
Referring to fig. 1, the guide rail seat 3 is used for fixing a guide rail 21, the measuring bar 19 is connected with the guide rail 21 through an elbow 17, a second U-shaped frame 16 and a first U-shaped frame 22, and the tail end of the measuring bar 19 is connected with a measuring claw 20.
Referring to fig. 4, a lifting ring screw 12 is arranged on the measuring lever, a lifting ring 14 is fixed on the support 5 through a screw, a spring 7 is arranged between the lifting ring screw 12 and the lifting ring 14, and the lifting ring screw 12 is fastened through a locknut 13; one sides of the first step 8 of the measuring lever and the support 5, which are close to the magnetic core seat and the coil seat, are provided with positioning screws 6, one ends of the positioning screws 6 are fixed with the support 5, and the other ends point to the first step 8 of the measuring lever, so that the coil seat and the magnetic core seat can be well prevented from being crushed by extrusion.
Referring to fig. 5, the integral spring 2, the second step 9 of the measuring lever, and the rail housing 3 are fixed by screws.
Referring to fig. 1 and 2, the measuring jaw mechanism includes 2 single measuring jaw mechanisms symmetrically arranged, and the single measuring jaw mechanism includes a guide rail 21, a spring support, a measuring rod connecting mechanism, a measuring rod 19 connected with the measuring rod connecting mechanism, and a measuring jaw 20; in this embodiment, the spring support includes a first U-shaped frame 22 close to the guide rail 21 and a second U-shaped frame 16 far away from the guide rail 21, the U-shaped frame includes a leg of the U-shaped frame and a connecting portion connecting the legs of the U-shaped frame, the opening directions of the two U-shaped frames are perpendicular to each other, the two U-shaped frames are integrally disposed, the connecting portion of the U-shaped frame of the first U-shaped frame 22 is a leg of the U-shaped frame of the second U-shaped frame 16, a sliding groove with an opposite opening direction is formed in the leg of the U-shaped frame of the first U-shaped frame 22, and the opening direction of the second U-shaped frame 15 is parallel to the sliding groove of the first U-shaped frame 22 along the moving direction of the guide rail.
Referring to fig. 2, the sliding groove of the first U-shaped frame 22 is a V-shaped groove, the guide rail 21 is i-shaped, two ends of the guide rail 21, which are close to the i-shaped structure on one side of the spring support, extend outward to form a splayed shape, and the guide rail 21 is connected with the V-shaped groove in a matching manner.
With reference to fig. 1 and fig. 2, the measuring bar connecting mechanism is an elbow 17, one end of the elbow 17 is connected to one end, which is close to the connecting portion of the U-shaped frame, of the U-shaped leg, which is far away from the guide rail 21, of the second U-shaped frame 16, and a fine adjustment screw 18 is arranged at one end, which is far away from the connecting portion of the U-shaped frame, of the U-shaped leg, which is connected to the elbow 17, of the second U-shaped frame 16; when the fine adjustment screw 18 is adjusted to enable one end, far away from the U-shaped frame connecting part, of the second U-shaped frame 16 to approach the guide rail 21, one end, close to the U-shaped frame connecting part, of the second U-shaped frame 16 slightly expands outwards, and the measuring rod connected with the elbow also deviates accordingly; specifically, as shown in fig. 1, when the fine adjustment screw 18 is adjusted to make one end of the second U-shaped frame 16, which is far away from the U-shaped frame connecting portion, approach the guide rail 21, the measuring rod 19 at the upper end is slightly shifted upward, and the measuring rod 19 at the lower end is slightly shifted downward. The elbow 17 extends outwards, one end of the elbow 17 extending outwards is connected with the measuring rod 19, and the tail end of the measuring rod 19 is connected with the measuring claw 20; the sliding groove is perpendicular to the moving direction of the guide rail 21, the direction of the measuring rod 19 and the direction of the measuring claw 20; and the guide rail 21 of the measuring claw mechanism is fixedly connected with the guide rail seat 3 of the measuring device.
Referring to fig. 1, the opening directions of the two second U-shaped frames 16 are opposite, and the measuring rod 19 is connected to the inner ends of the two elbows 17.
Wire suitable for bearing internal diameter detection's automatic measurement controller's sensor insert the control part of automatic measurement controller, measuring device's guide rail seat with the guide rail fixed connection who surveys claw mechanism. The use method of the automatic measurement controller comprises the following steps: the distance between the measuring claws is adjusted according to the target inner diameter of the bearing to be processed, and the distance can be adjusted through a guide rail; after a lead led out from the tension coil is electrified, the tension coil generates a magnetic field to attract one end of a corresponding measuring lever provided with a magnetic core seat or a coil seat, namely the two measuring levers are relatively separated, at the moment, the measuring claws are relatively close to each other, the measuring claws are put into the inner ring of the bearing, the measuring claws are loosened, the lead led out from the tension coil is powered off, the tension coil is separated from the measuring levers, and then the measuring claws are pressed and contacted with the inner ring of the bearing through a fine adjustment screw; along with the grinding of the grinding tool on the grinding machine to the bearing inner ring, the distance between the two measuring claws is increased, and under the action of the integral spring 2 and the spring 7, the two measuring levers are relatively close to each other, namely, the coil in the coil holder is relatively close to the magnetic core on the magnetic core holder, and the inductance of the coil in the coil holder is changed; the closer the processing progress of the bearing inner ring is to the target inner diameter, the larger the distance between the two measuring claws is, the smaller the distance between the coil holder and the magnetic core holder on the two measuring levers is, and the larger the inductance generated by the coil in the coil holder is; the control part of the automatic measurement control instrument sends signals to the grinding machine in real time, and the grinding machine receives the signals sent by the control part to adjust the grinding speed of the grinding tool so as to ensure the processing precision.
Example 2
Referring to fig. 6, unlike embodiment 1, the opening directions of the two second U-shaped frames 16 are opposite, and the measuring rod 19 is connected to the outer ends of the two elbows 17.
Claims (9)
1. The utility model provides a sensor suitable for automatic measure control appearance that bearing internal diameter detected which characterized in that: the device comprises a measuring device and a measuring jaw mechanism, wherein the measuring device comprises a measuring mechanism and a shell assembled with the measuring mechanism, and the measuring mechanism comprises a support, a measuring lever and a guide rail seat which are symmetrically arranged on two sides of the support; the two measuring levers are step-shaped and comprise a first step provided with a magnetic core seat or a coil seat and a second step; the second step of the measuring lever, the guide rail seat and the support are connected through a U-shaped elastic piece, the second step of the measuring lever and the guide rail seat are connected with the same branch of the U-shaped elastic piece, the support is connected with the other branch of the U-shaped elastic piece, the measuring lever and the support are positioned on one side of an opening of the U-shaped elastic piece, and the guide rail seat is positioned on one side of the back of the U-shaped elastic piece; the magnetic core seat and the coil seat are oppositely arranged; a tension coil is arranged on the shell at a position corresponding to the first step of the measuring lever; one end of the guide rail seat is connected with the U-shaped elastic piece, and the other end of the guide rail seat extends out of the outer side of the shell; the coil on the coil holder and the coil on the coil holder are both connected with wires and extend out of the shell; a locking plate is arranged on one side, close to the tension coil, of the measuring lever, and the locking plate is made of soft magnetic materials; the measuring claw mechanism comprises 2 single measuring claw mechanisms which are symmetrically arranged, each single measuring claw mechanism comprises a guide rail, a spring support and a measuring rod connecting mechanism, one side of each spring support is provided with a sliding groove which is matched and connected with the guide rail, the other side of each spring support is connected with one end of each measuring rod connecting mechanism, the other end of each measuring rod connecting mechanism extends outwards, the other end of each measuring rod connecting mechanism is connected with a measuring rod, and the tail end of each measuring rod is connected with a measuring claw; the sliding groove is perpendicular to the moving direction of the guide rail, the direction of the measuring rod and the direction of the measuring claw; and the guide rail of the measuring claw mechanism is fixedly connected with the guide rail seat of the measuring device.
2. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 1, wherein: and a positioning screw is arranged between one side of the support close to the magnetic core seat and the coil seat and the first step of the measuring lever.
3. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 1, wherein: and a spring is connected between one side of the support close to the magnetic core seat and the coil seat and the measuring lever.
4. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 1, wherein: the U-shaped resilient member comprises an integral spring.
5. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 1, wherein: the spring support comprises a first U-shaped frame close to the guide rail and a second U-shaped frame far away from the guide rail, the U-shaped frame comprises U-shaped frame supporting legs and is connected with the U-shaped frame connecting portions of the U-shaped frame supporting legs, the opening directions of the two U-shaped frames are perpendicular to each other, the two U-shaped frames are integrally arranged, the U-shaped frame connecting portions of the first U-shaped frame are the U-shaped frame supporting legs of the second U-shaped frame, sliding grooves opposite to the opening directions are formed in the U-shaped frame supporting legs of the first U-shaped frame, and the opening directions of the second U-shaped frame are parallel to the moving direction of the guide rail along the sliding grooves in the first U-shaped frame.
6. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 5, wherein: the measuring rod connecting mechanism is an elbow, one end of the elbow is connected with one end, close to the connecting part of the U-shaped frame, of the U-shaped supporting leg of the guide rail, far away from the connecting part of the U-shaped frame, of the second U-shaped frame, and one end, far away from the connecting part of the U-shaped frame, of the U-shaped supporting leg connected with the elbow, of the second U-shaped frame is provided with a fine adjustment screw.
7. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 5, wherein: the sliding groove in the first U-shaped frame is a V-shaped groove, and the guide rail is connected with the V-shaped groove in a matched mode.
8. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 6, wherein: the opening directions of the two second U-shaped frames are oppositely arranged, the measuring rod is connected with the inner side ends of the two elbows, or the opening directions of the two second U-shaped frames are oppositely arranged, and the measuring rod is connected with the outer side ends of the two elbows.
9. The sensor of the automatic measurement controller suitable for the inner diameter detection of the bearing according to claim 1, wherein: the guide rail is I-shaped, and the two ends of the I-shaped structure on one side of the spring support close to the guide rail extend outwards to form a splayed shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023217861.5U CN214445574U (en) | 2020-12-28 | 2020-12-28 | Sensor of automatic measurement control instrument suitable for bearing inner diameter detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023217861.5U CN214445574U (en) | 2020-12-28 | 2020-12-28 | Sensor of automatic measurement control instrument suitable for bearing inner diameter detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214445574U true CN214445574U (en) | 2021-10-22 |
Family
ID=78195330
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023217861.5U Expired - Fee Related CN214445574U (en) | 2020-12-28 | 2020-12-28 | Sensor of automatic measurement control instrument suitable for bearing inner diameter detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214445574U (en) |
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2020
- 2020-12-28 CN CN202023217861.5U patent/CN214445574U/en not_active Expired - Fee Related
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