CN212341317U - Sample clamping device of resistance measuring instrument - Google Patents
Sample clamping device of resistance measuring instrument Download PDFInfo
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- CN212341317U CN212341317U CN202020697574.XU CN202020697574U CN212341317U CN 212341317 U CN212341317 U CN 212341317U CN 202020697574 U CN202020697574 U CN 202020697574U CN 212341317 U CN212341317 U CN 212341317U
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Abstract
The utility model provides a sample clamping device of a resistance measuring instrument, which comprises a base, a pair of bases which are slidably arranged on the base, and a pair of pressing mechanisms which are respectively arranged above the pair of bases, wherein a conductor block is respectively arranged on the pair of bases, the two conductor blocks are respectively connected with a resistance end and a voltage end of the resistance measuring instrument, the pressing mechanisms are matched with the conductor block on the base to fix a sample to be measured on the sample clamping device of the resistance measuring instrument, the sample clamping device of the resistance measuring instrument is characterized in that the sample clamping device of the resistance measuring instrument also comprises a pair of lifting mechanisms which are respectively fixedly arranged on the pair of bases, the lifting mechanism comprises a lifting upright post which is fixedly arranged on the base, a rack, a cylindrical gear which is meshed with the rack, and a lifting knob which is fixedly connected with the cylindrical gear, the rack is movably arranged in a rack groove of the lifting upright post, the rack is also fixedly connected with the pressing mechanism.
Description
Technical Field
The utility model relates to an instrument clamping device technical field especially relates to a resistance measuring instrument sample clamping device.
Background
A direct resistance measuring instrument is an instrument for measuring the conductivity of an object. The device is mainly suitable for measuring metal conductors, wires and other contact point resistances, motors, transformer winding resistances and the like, has the advantages of high measurement precision, stable performance, wide measurement range and strong anti-interference capability, and is widely used for measurement in laboratories, industrial and mining enterprises and the like.
The sample holding device of the direct resistance measuring instrument is an important component of the measuring instrument, and influences the measuring result of the instrument. The connection contact degree of the sample and the platform clamping device has a remarkable influence on the resistivity measurement result. In order to conveniently place samples with different shapes and specifications at the connecting part, a binding type pressing device is usually adopted to contact the samples with a conductor block, so that the samples are easy to loosen outwards in the pressing process, and poor contact is caused; when a sample with a soft material is measured, the sample is easily deformed due to overlarge pressing force, so that the size of the sample is changed. In addition, when different-shape samples are detected, the detection result is greatly deviated due to the reasons of clamping failure, uneven contact and the like. According to a resistivity calculation formula: and rho is RS/L (rho is resistivity, R is measured resistance, S is sample cross-sectional area, and L is sample effective measurement length), and the sample effective length accuracy has influence on the result of measuring the resistivity. For this reason, improvements in sample holding devices are needed.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a resistance measurement appearance sample clamping device, it pushes down the dynamics that compresses tightly that the mechanism adjusted the sample to be measured through the elevating system cooperation to fix the sample of different shape specifications on clamping device.
The utility model provides a sample clamping device of a resistance measuring instrument, which is used for clamping a sample to be measured when the resistance measuring instrument measures the conductivity of the sample to be measured, and comprises a base, a pair of bases which are arranged on the base in a sliding way, and a pair of pressing mechanisms which are respectively arranged above the pair of bases, wherein a pair of bases are respectively provided with a conductor block, two conductor blocks are respectively connected with a resistance end and a voltage end of the resistance measuring instrument, the pressing mechanisms are matched with the conductor block on the bases to fix the sample to be measured on the sample clamping device of the resistance measuring instrument, the sample clamping device of the resistance measuring instrument is characterized in that the sample clamping device of the resistance measuring instrument also comprises a pair of lifting mechanisms which are respectively fixedly arranged on the pair of bases, each lifting mechanism comprises a lifting upright post which is fixedly arranged on the bases, a rack, a cylindrical gear which is meshed with the rack, and a lifting knob, the rack is movably arranged in a rack groove of the lifting upright post, the rack is fixedly connected with the pressing mechanism, and the lifting knob controls the rack to move up and down along the rack groove through the cylindrical gear, so that the pressing mechanism is driven to move up and down to be matched with the conductor block to compress or loosen the sample to be detected.
Preferably, the mechanism of pushing down includes a backplate, a base plate, a spring and briquetting down, backplate fixed mounting be in the rack, base plate fixed mounting be in on the backplate, the base plate is still installed along compressing tightly the direction in proper order spring and briquetting down, the setting of spring is guaranteeing to await measuring under the prerequisite that sample and conductor block and briquetting fully contact down, further protects the sample that awaits measuring and avoids taking place deformation because of pressure is too big to guarantee the accuracy of testing result.
Preferably, the part of the lower pressing block, which is in contact with the sample to be measured, is in a groove shape, the sample is reed and fixed through the lower pressing block with the groove, so that the samples in different shapes can be fully contacted with the connecting device without loosening, and the problem that the samples in partial shapes are not easy to measure is solved.
Preferably, the base is provided with a measuring ruler for measuring the effective length of the sample to be measured, the measuring ruler can directly measure the effective length of the sample to be measured on the clamping device, the effective measuring length of the sample is measured and displayed under the condition that the sample is not dismounted, the problem of difficulty in measuring the effective length in the testing process is solved, and the measuring accuracy is further ensured.
Preferably, the conductor block is knife-edge-shaped, and the knife-edge-shaped conductor block is in line contact with a sample to be measured, so that the reading of the measuring ruler can be better observed, and the measuring error of the effective length is reduced.
Preferably, the base is provided with two guide rails, a pair of pulleys is installed on the bottom surface of the base, and the base is movably installed on the base through the cooperation of the pulleys and the guide rails.
The utility model provides a pair of resistance measuring instrument sample clamping device, it pushes down the dynamics that compresses tightly that the mechanism adjusted the sample to be measured through the elevating system cooperation, can fix the sample of different shape specifications on clamping device, prevents that the sample from pressing from both sides the not tight and inhomogeneous condition of contact of appearance sample in the measurement process, guarantees the accuracy of testing result, promotes this resistance measuring instrument sample clamping device's commonality simultaneously.
Drawings
Fig. 1 is a top view of a sample holding device of a resistance measuring instrument according to a first embodiment of the present invention;
FIG. 2 is an A-A elevational view of the sample holder of the resistance measuring instrument of FIG. 1.
In the figure, 1-base, 2-guide rail, 3-measuring scale, 4-base, 5-base bolt, 6-voltage interface end, 7-resistance interface end, 8-pulley, 9-lifting mechanism base, 10-conductor block, 11-lifting mechanism base bolt, 12-lower pressing block, 13-lifting upright post, 14-lower pressing block nut, 15-spring, 16-lower pressing block screw, 17-base plate, 18-rack, 19-lifting knob, 20-back plate and 21-rack groove.
Detailed Description
The embodiments described below are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a preferred embodiment of a sample clamping device of a resistance measuring instrument, the sample clamping device of the resistance measuring instrument is used for clamping a sample to be measured when the resistance measuring instrument measures the conductivity of the sample to be measured, and the sample clamping device comprises a base 1, a pair of insulating bases 4 slidably mounted on the base 1, a pair of pressing mechanisms and a pair of lifting mechanisms, wherein the lifting mechanisms are fixedly mounted on the base, the pressing mechanisms are fixedly mounted on the lifting mechanisms and located right above the base, a conductor block 10 is further disposed on the base 4 corresponding to the pressing mechanisms, when samples with different lengths and specifications need to be measured, the base is moved to adapt the distance between the two conductor blocks 10 to the sample, the pressing mechanisms are driven by the lifting mechanisms to compress the sample, and the conductor blocks 10 are further connected to a dc resistance measuring instrument through a voltage interface end 6 and a resistance interface end 7 respectively, therefore, the resistance of the sample is measured by the direct current resistance tester, and the resistivity of the sample is calculated according to a formula.
The sample holding device of the resistance measuring instrument is further described by the following description of specific structures:
firstly, referring to fig. 1 and 2, a pair of guide rails 2 are arranged on a base 1, a pulley 8 is connected to a pair of bases 4 through a base bolt 5, the pulley 8 is matched with the guide rails 2 to slidably mount the bases 4 on the base, so as to realize the displacement of the bases 4 relative to the base 1, in addition, a measuring ruler 3 is also arranged on the base 1, in practical application, the base 4 at one end is generally fixed, the measuring ruler 3 starts to measure from the position where a conductor block 10 on the base 4 is in contact with a sample line until the position where the conductor block 10 on the base 4 at the other end is in contact with the sample line finishes measuring, and the effective measuring length of the sample is obtained.
Then, referring to fig. 2, the lifting mechanism includes a lifting mechanism base 9, a lifting mechanism base bolt 11, a lifting column 13, a rack 18, a cylindrical gear (not shown), and a lifting knob 19, wherein the lifting mechanism base 9 is fixedly mounted on the base 4, the lifting column 13 is fixedly mounted on the lifting mechanism base 9 through the lifting mechanism base bolt 11, the conductor block 10 can be further embedded on the lifting mechanism base 9, a rack slot 21 is formed in the lifting column 13, the rack is movably mounted in the rack slot 21, and the lifting knob 19 controls the rack to move up and down along the rack slot through the cylindrical gear engaged with the rack 18;
secondly, the pressing mechanism fixedly arranged on the lifting mechanism comprises a back plate 20, a base plate 17, a pressing block screw 16, a spring 15, a pressing block nut 14 and an insulating pressing block 12, wherein, the back plate 20 is fixedly connected with the rack 18, the back plate 20 and the rack 18 can also be an integral body, the base plate 17 is fixedly arranged on the back plate, the base plate 17 is perpendicular to the back plate, the base plate 17 is further provided with a spring 15 and a lower pressing plate 12 along the pressing direction, the spring is mounted between the base plate 17 and the lower platen 12 by a lower platen screw 16 and a lower platen nut 14, the lower pressing plate 12 is positioned right above the conductor block 10, and in combination with the lifting mechanism, the lifting knob 19 controls the rack 18 to move up and down along the rack slot through the cylindrical gear, thereby driving the lower pressing block 12 to move up and down, and pressing or loosening the sample to be detected in cooperation with the conductor block 10; wherein, spring 15's setting is guaranteeing to await measuring under the prerequisite of sample and conductor piece 10 and lower clamp plate 12 full contact, and the further protection sample of awaiting measuring avoids taking place deformation because of pressure is too big to guarantee the accuracy of testing result, can be preferred, lower clamp plate 12 is the recess shape with the position of sample contact, and the lower clamp plate 12 of taking the recess lives and fixes the sample reed, makes the sample of different shapes all can with connecting device full contact and can not become flexible, solves the sample of partial shape and is difficult to the measuring problem.
The utility model provides a resistance measuring instrument sample clamping device pushes down the dynamics that compresses tightly that the mechanism adjusted the sample to be measured through the elevating system cooperation to fix the sample of different shape specifications on clamping device, have better measurement stability and higher commonality.
The above disclosure is only a preferred embodiment of the present invention, and certainly should not be taken as limiting the scope of the invention, which is defined by the claims and their equivalents.
Claims (6)
1. A resistance measuring instrument sample clamping device is used for clamping a sample to be measured when the resistance measuring instrument measures the conductivity of the sample to be measured, and comprises a base, a pair of bases which are slidably arranged on the base, and a pair of pressing mechanisms which are respectively arranged above the pair of bases, wherein a conductor block is respectively arranged on the pair of bases, the two conductor blocks are respectively connected with a resistance end and a voltage end of the resistance measuring instrument, the pressing mechanisms are matched with the conductor blocks on the bases to fix the sample to be measured on the resistance measuring instrument sample clamping device, the resistance measuring instrument sample clamping device is characterized by also comprising a pair of lifting mechanisms which are respectively fixedly arranged on the pair of bases, each lifting mechanism comprises a lifting upright post which is fixedly arranged on the base, a rack, a cylindrical gear which is meshed with the rack, and a lifting knob which is fixedly connected with the cylindrical gear, the rack is movably arranged in a rack groove of the lifting upright post, the rack is fixedly connected with the pressing mechanism, and the lifting knob controls the rack to move up and down along the rack groove through the cylindrical gear, so that the pressing mechanism is driven to move up and down to be matched with the conductor block to compress or loosen the sample to be detected.
2. The device as claimed in claim 1, wherein the pressing mechanism includes a back plate, a base plate, a spring, and a pressing block, the back plate is fixedly mounted on the rack, the base plate is fixedly mounted on the back plate, and the spring and the pressing block are sequentially mounted on the base plate along the pressing direction.
3. The sample holding device for resistance measuring instrument according to claim 2, wherein the contact portion of the lower pressing block and the sample to be measured is in the shape of a groove.
4. The sample holding device of claim 1, wherein the base is provided with a measuring ruler for measuring the effective length of the sample to be measured.
5. The sample holder of claim 1, wherein the conductor block is in the shape of a knife-edge.
6. The sample clamping device for the resistance measuring instrument according to claim 1, wherein the base is provided with two guide rails, a pair of pulleys is mounted on the bottom surface of the base, and the base is movably mounted on the base through the pulleys matching with the guide rails.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697574.XU CN212341317U (en) | 2020-04-30 | 2020-04-30 | Sample clamping device of resistance measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020697574.XU CN212341317U (en) | 2020-04-30 | 2020-04-30 | Sample clamping device of resistance measuring instrument |
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| Publication Number | Publication Date |
|---|---|
| CN212341317U true CN212341317U (en) | 2021-01-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020697574.XU Active CN212341317U (en) | 2020-04-30 | 2020-04-30 | Sample clamping device of resistance measuring instrument |
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| CN (1) | CN212341317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071111A1 (en) * | 2021-10-28 | 2023-05-04 | 天津大学滨海工业研究院有限公司 | Crane pulley testing device for ocean engineering |
-
2020
- 2020-04-30 CN CN202020697574.XU patent/CN212341317U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023071111A1 (en) * | 2021-10-28 | 2023-05-04 | 天津大学滨海工业研究院有限公司 | Crane pulley testing device for ocean engineering |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20211230 Address after: 510642 No. five, 483 mountain road, Guangzhou, Guangdong, Tianhe District Patentee after: SOUTH CHINA AGRICULTURAL University Patentee after: Meizhou Jiasheng industry and Trade Co., Ltd Address before: 510640 courtyard, 88 Jinhui street, Tianhe District, Guangzhou City, Guangdong Province Patentee before: GUANGDONG IRON AND STEEL INSTITUTE Patentee before: Meizhou Jiasheng industry and Trade Co., Ltd |
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| TR01 | Transfer of patent right |