CN109163833B - Device for measuring maximum locking force of clamp plate fastening strip - Google Patents
Device for measuring maximum locking force of clamp plate fastening strip Download PDFInfo
- Publication number
- CN109163833B CN109163833B CN201811027615.8A CN201811027615A CN109163833B CN 109163833 B CN109163833 B CN 109163833B CN 201811027615 A CN201811027615 A CN 201811027615A CN 109163833 B CN109163833 B CN 109163833B
- Authority
- CN
- China
- Prior art keywords
- screw
- bottom plate
- plate
- screw rod
- force sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing And Processing Devices For Dough (AREA)
- Connection Of Plates (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention provides a device for measuring the maximum locking force of a clamp fastening strip of a plate card to the plate card, which comprises a bottom plate, a test plate clamping mechanism, a gasket type force sensor, a screw and a case fastening mechanism, wherein the case fastening mechanism is arranged on the bottom plate, and the center of the bottom plate is provided with a screw hole; the screw is movably arranged in the screw hole in a penetrating manner and moves along the axial direction of the screw, a gasket type force sensor and a hexagon nut are sequentially sleeved on the screw positioned on the top surface of the bottom plate, and a first gasket and a second gasket are respectively arranged between the gasket type force sensor and the bottom plate and between the gasket type force sensor and the hexagon nut; the screw rod of bottom plate bottom surface passes through the second round pin axle to be fixed on test board fixture, and the test board is fixed in test board fixture's bottom. The device can effectively determine the maximum locking force of the board locking strip to the board quickly, and greatly improves the measurement efficiency. Therefore, the device has wide application prospect in the field of locking force measurement.
Description
Technical Field
The invention relates to a device for measuring locking force, in particular to a device for measuring the maximum locking force of a clamp plate on a clamp plate through a clamp bar of the clamp plate.
Background
At present, IEC 60297-3-101,482.6mm (19') standard series chassis and plug-in boxes are widely applied in the electronic industry, and PCB (Printed Circuit Board) boards in the box bodies are generally positioned and fastened by Board locking strips. The standard series chassis and the plug box are widely applied to the aerospace field and the military equipment field at present, the reliability of equipment in the fields is extremely high, and the PCB (printed circuit board) card needs to be prevented from loosening or even falling from the plug box due to vibration and impact to the greatest extent.
Disclosure of Invention
The invention aims to provide a device special for measuring the maximum locking force of a locking strip of a board card on a PCB (printed circuit board).
In order to achieve the purpose, the invention provides the following technical scheme:
a device for measuring the maximum locking force of a clamp of a plate card lock, which comprises a bottom plate, a test plate clamping mechanism, a gasket type force sensor, a screw and a case fastening mechanism, wherein the case fastening mechanism is arranged on the bottom plate, and the center of the bottom plate is provided with a screw hole; the screw rod is movably arranged in the screw rod hole in a penetrating mode and moves along the axial direction of the screw rod, a gasket type force sensor and a hexagon nut are sequentially sleeved on the screw rod positioned on the top surface of the bottom plate, and a first gasket and a second gasket are respectively arranged between the gasket type force sensor and the bottom plate and between the gasket type force sensor and the hexagon nut; the screw rod of bottom plate bottom surface passes through the second round pin axle to be fixed on test board fixture, and the test board is fixed in test board fixture's bottom.
Further, quick-witted case fastening device is including setting up in a plurality of screw holes of bottom plate periphery, dispose an eccentric screw in every screw hole, and every eccentric screw is gone up the cover and is equipped with the thin nut of annular knurl of laminating bottom plate top surface and bottom surface respectively.
Furthermore, the two opposite end faces of the screw are of flat structures, and the screw hole is a waist-shaped hole matched with the screw.
Furthermore, the test plate clamping mechanism comprises a clamping head, a screw fixing block is arranged at one end of the clamping head, a first groove matched with the flat surface of the screw is arranged at the center of the screw fixing block, two opposite end surfaces of the first groove are provided with communicated second pin holes, screw pin holes consistent with the inner diameters of the second pin holes are formed in the screw, the screw is inserted into the first groove, so that the screw holes are communicated with the second pin holes, and a second pin shaft penetrates through the second pin holes and the screw pin holes and fixes the screw on the clamping head; the other end of chuck is equipped with the test board grip block, the center of test board grip block is equipped with the second recess with test board thickness looks adaptation, the both sides of test board grip block are equipped with the first pinhole of a pair of intercommunication respectively on two terminal surfaces that the second recess is relative, be equipped with on the test board with the fixed orifices of two pairs of first pinhole looks adaptations, the test board inserts the second recess and makes fixed orifices and first pinhole be linked together and fix on the chuck through first round pin axle.
Furthermore, the screw hole is a waist-shaped hole, the head of the eccentric screw is a cylinder eccentric to the axis of the thread section, one section of the tail of the thread of the eccentric screw is of a flat structure, and a through hole for inserting a small rod to adjust the eccentric circle of the head of the screw and locking the knurled thin nut is formed in the flat surface.
Furthermore, one end, close to the bottom plate, of the gasket type force sensor is a supporting surface, the other end of the gasket type force sensor is a working surface, the outer diameter and the aperture of the first gasket are slightly larger than the supporting surface of the gasket type force sensor, the bottom surface of the sensor is prevented from being directly contacted with the waist-shaped hole in the bottom plate, and therefore the sensor is protected; the outer diameter and the aperture of the second gasket are slightly larger than the working surface of the gasket type force sensor, so that the working surface of the sensor is prevented from directly contacting with the nut.
Furthermore, the outer circumferential surface of the second gasket is provided with a radial hole in which a small rod can be inserted, so that the gasket and the nut are prevented from rotating together to generate friction damage on the working surface of the sensor.
The small rod used above can be any round iron rod with matched size, such as nail and pin.
Has the advantages that: the invention provides a device for measuring the maximum locking force of a locking strip of a board card on the board card, which can quickly and effectively measure the maximum locking force of the locking strip of the board card on the board card, and greatly improves the measurement efficiency. The device has the advantages of simple structure, reasonable design, convenient operation, convenient assembly and disassembly, light weight and convenient movement, and therefore, the device has wide application prospect in the field of locking force measurement.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural diagram of the bottom plate of the present invention.
Fig. 3 is a schematic structural view of the screw of the present invention.
Fig. 4 is a schematic structural diagram of the gasket-type force sensor of the present invention.
FIG. 5 is a schematic structural diagram of a test plate holding mechanism according to the present invention.
Fig. 6 is a schematic structural view of the eccentric screw of the present invention.
FIG. 7 is a schematic view of the structure of the test plate of the present invention.
In the figure: 1. a base plate; 2. a test plate clamping mechanism; 201. a chuck; 202. a screw fixing block; 203. a first groove; 204. a second pin hole; 205. a screw pin hole; 206. a test plate clamping block; 207. a second groove; 208. a first pin hole; 3. a washer-type force sensor; 31. a support surface; 32. a working surface; 4. a screw; 41. a screw hole; 5. a chassis fastening mechanism; 501. screw holes; 502. an eccentric screw; 503. knurling the thin nut; 504. a through hole; 6. a hexagonal nut; 7. a first gasket; 8. a second gasket; 81. a radial bore; 9. a second pin shaft; 10. a test plate; 11. a first pin.
Detailed Description
The present invention is further described below with reference to specific examples, which are only exemplary and do not limit the scope of the present invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications may be made without departing from the spirit and scope of the invention.
A device for measuring the maximum locking force of a clamp of a plate card comprises a bottom plate 1, a test plate clamping mechanism 2, a gasket type force sensor 3, a screw 4 and a case fastening mechanism 5, wherein the case fastening mechanism 5 is arranged on the bottom plate 1, and the center of the bottom plate 1 is provided with a screw hole 41; the screw 4 is movably arranged in the screw hole 41 in a penetrating manner and moves along the axial direction of the screw, a gasket type force sensor 3 and a hexagon nut 6 are sequentially sleeved on the screw positioned on the top surface of the bottom plate 1, and a first gasket 7 and a second gasket 8 are respectively arranged between the gasket type force sensor 3 and the bottom plate 1 and between the gasket type force sensor 3 and the hexagon nut 6; the screw rod of bottom plate 1 bottom surface passes through second round pin axle 9 to be fixed on test board fixture 2, and test board 10 is fixed in the bottom of test board fixture 2.
The chassis fastening mechanism 5 comprises four screw holes 501 averagely arranged on the periphery of the bottom plate, an eccentric screw 502 is arranged in each screw hole 501, and a knurled thin nut 503 attached to the top surface and the bottom surface of the bottom plate is sleeved on each eccentric screw 502. The screw hole 501 is a waist-shaped hole, the head of the eccentric screw 502 is a cylinder eccentric to the axis of the threaded section, one section of the tail of the thread of the eccentric screw 502 is of a flat structure, and a through hole 504 for inserting a small rod to adjust the eccentric circle of the head of the screw and locking the knurled thin nut is arranged on the flat surface.
The opposite two end faces of the screw rod 4 are of flat structures, and the screw rod hole 41 is a waist-shaped hole matched with the screw rod 4.
The test board clamping mechanism 2 comprises a clamping head 201, a screw fixing block 202 is arranged at one end of the clamping head 201, a first groove 203 matched with the thickness of a flat surface of a screw is arranged at the center of the screw fixing block 202, two opposite end surfaces of the first groove 203 are provided with communicated second pin holes 204, screw pin holes 205 with the same inner diameter as the second pin holes 204 are arranged on the screw 4, the screw 4 is inserted into the first groove 203 to enable the screw pin holes 205 to be communicated with the second pin holes 204, and a second pin shaft 9 penetrates through the second pin holes 204 and the screw pin holes 205 and fixes the screw 4 on the clamping head 201; the other end of chuck 201 is equipped with test board grip block 206, the center of test board grip block 206 is equipped with the second recess 207 with test board 10 thickness looks adaptation, the both sides of test board grip block 206 are equipped with the first pinhole 208 of a pair of intercommunication respectively on the relative two terminal surfaces of second recess 207, are equipped with the fixed orifices with two pairs of first pinhole looks adaptations on the test board 10, and test board 10 inserts second recess 207 and makes fixed orifices and first pinhole 208 be linked together and fix on chuck 201 through first round pin axle 11.
One end of the gasket type force sensor 3, which is close to the bottom plate, is a supporting surface 31, the other end of the gasket type force sensor is a working surface 32, the outer diameter and the aperture of the first gasket 7 are slightly larger than the supporting surface of the gasket type force sensor, the bottom surface of the sensor is prevented from being directly contacted with the waist-shaped hole in the bottom plate, and therefore the sensor is protected; the outer diameter and the aperture of the second gasket 8 are slightly larger than the working surface of the gasket type force sensor, so that the working surface of the sensor is prevented from directly contacting with the nut. The outer circumferential surface of the second gasket 8 is provided with a radial hole 81 in which a small rod can be inserted, so that the gasket and the nut are prevented from rotating together to generate friction damage on the working surface of the sensor.
The small rod used above can be any round iron rod with matched size, such as nail and pin.
The working principle of the invention is as follows: as shown in the figure, the bottom plate is positioned and locked at the flange at the inner side of the chassis opening by 4 eccentric screws and 8 knurled thin nuts, the bottom plane of an eccentric circle of the 4 eccentric screws is tightly attached to the flange plane at the inner side of the chassis, and the outer circular surface of the eccentric circle is tightly attached to the inner side surface of the chassis; the lower end of the screw rod is connected with the chuck by a shaft pin and is connected with a test board (a simulated PCB board) by 2 shaft pins through the chuck.
The screw rod is pulled upwards by rotating the hexagonal nut, the chuck connected with the screw rod generates a pulling force on the test board, and the test board is locked in the case by the board locking strip, so that a reaction force for counteracting the pulling force is generated.
Because the case fastening mechanism is positioned and locked on the inner side flange and the side surface of the case opening by 4 eccentric screws and 8 knurled thin nuts, the case fastening mechanism is pressed by the reaction force of the upper section in the whole measuring process, and cannot rotate and float up and down.
The flat surface of the screw rod is in large clearance fit with the groove width of the first groove, so that the friction force generated by the screw rod and the first groove when the screw rod moves up and down is extremely small, and the numerical value of a relative measurement result can be ignored.
Claims (5)
1. A device for measuring the maximum locking force of a clamp of a plate card lock is characterized by comprising a bottom plate, a test plate clamping mechanism, a gasket type force sensor, a screw and a case fastening mechanism, wherein the case fastening mechanism is arranged on the bottom plate, and a screw hole is formed in the center of the bottom plate; the screw rod is movably arranged in the screw rod hole in a penetrating mode and moves along the axial direction of the screw rod, a gasket type force sensor and a hexagon nut are sequentially sleeved on the screw rod positioned on the top surface of the bottom plate, and a first gasket and a second gasket are respectively arranged between the gasket type force sensor and the bottom plate and between the gasket type force sensor and the hexagon nut; the screw rod on the bottom surface of the bottom plate is fixed on the test plate clamping mechanism through a second pin shaft, and the test plate is fixed at the bottom of the test plate clamping mechanism;
the two opposite end faces of the screw are of flat structures, and the screw hole is a waist-shaped hole matched with the screw; the test plate clamping mechanism comprises a clamping head, a screw rod fixing block is arranged at one end of the clamping head, a first groove matched with the flat surface of the screw rod in thickness is arranged at the center of the screw rod fixing block, two opposite end faces of the first groove are provided with communicated second pin holes, screw rod pin holes consistent with the inner diameters of the second pin holes are formed in the screw rod, the screw rod is inserted into the first groove, so that the screw rod pin holes are communicated with the second pin holes, and a second pin shaft penetrates through the second pin holes and the screw rod pin holes and fixes the screw rod on the clamping head; the other end of chuck is equipped with the test board grip block, the center of test board grip block is equipped with the second recess with test board thickness looks adaptation, the both sides of test board grip block are equipped with the first pinhole of a pair of intercommunication respectively on two terminal surfaces that the second recess is relative, be equipped with on the test board with the fixed orifices of two pairs of first pinhole looks adaptations, the test board inserts the second recess and makes fixed orifices and first pinhole be linked together and fix on the chuck through first round pin axle.
2. The device for measuring the maximum locking force of the clamp plate fastener strip to the clamp plate as claimed in claim 1, wherein the fastening mechanism of the case comprises a plurality of screw holes arranged on the periphery of the bottom plate, each screw hole is provided with an eccentric screw, and each eccentric screw is respectively sleeved with a knurled thin nut which is attached to the top surface and the bottom surface of the bottom plate.
3. The device for measuring the maximum locking force of the clamp plate by the clamp bar of the clamp plate as claimed in claim 2, wherein the screw hole is a kidney-shaped hole, the head of the eccentric screw is a cylinder eccentric to the axis of the threaded section, a section of the tail of the thread of the eccentric screw is a flat structure, and a through hole for inserting an eccentric circle at the head of a small rod adjusting screw and locking a knurled thin nut is arranged on the flat surface.
4. The device for measuring the maximum locking force of a clamp of a plate lock on the plate lock as claimed in claim 1, wherein one end of the washer-type force sensor near the bottom plate is a supporting surface, the other end of the washer-type force sensor is a working surface, the outer diameter and the aperture of the first washer are slightly larger than the supporting surface of the washer-type force sensor, and the outer diameter and the aperture of the second washer are slightly larger than the working surface of the washer-type force sensor.
5. The device for measuring the maximum locking force of a trigger lock fastening strip to a trigger as claimed in claim 1, wherein the second washer has a radial hole formed on an outer circumferential surface thereof for receiving a small rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027615.8A CN109163833B (en) | 2018-09-04 | 2018-09-04 | Device for measuring maximum locking force of clamp plate fastening strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811027615.8A CN109163833B (en) | 2018-09-04 | 2018-09-04 | Device for measuring maximum locking force of clamp plate fastening strip |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109163833A CN109163833A (en) | 2019-01-08 |
| CN109163833B true CN109163833B (en) | 2020-06-16 |
Family
ID=64894206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811027615.8A Active CN109163833B (en) | 2018-09-04 | 2018-09-04 | Device for measuring maximum locking force of clamp plate fastening strip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109163833B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329211A (en) * | 2007-06-20 | 2008-12-24 | Ykk株式会社 | Snap fastener separation force measuring apparatus and measuring method, and snap fastener holder |
| CN201532272U (en) * | 2009-11-17 | 2010-07-21 | 上海龙能自动化设备有限公司 | Opening force detecting device of coiler belt catch |
| CN105258834A (en) * | 2015-10-30 | 2016-01-20 | 昆山鸿志犀自动化机电设备有限公司 | Pressing module for testing drawing force of keycap and test machine for drawing force of keycap |
| CN106197809A (en) * | 2016-08-26 | 2016-12-07 | 安徽安凯华夏汽车配件（合肥）有限公司 | A kind of lock force test device |
| CN205843859U (en) * | 2016-05-24 | 2016-12-28 | 上海金克半导体设备有限公司 | A kind of measure the device fastening power between finger |
| CN106289609A (en) * | 2016-08-02 | 2017-01-04 | 浙江吉利控股集团有限公司 | Pull-out force detector |
| CN206147485U (en) * | 2016-11-10 | 2017-05-03 | 黑龙江大学 | Computer motherboard joint installation locking device |
-
2018
- 2018-09-04 CN CN201811027615.8A patent/CN109163833B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329211A (en) * | 2007-06-20 | 2008-12-24 | Ykk株式会社 | Snap fastener separation force measuring apparatus and measuring method, and snap fastener holder |
| CN201532272U (en) * | 2009-11-17 | 2010-07-21 | 上海龙能自动化设备有限公司 | Opening force detecting device of coiler belt catch |
| CN105258834A (en) * | 2015-10-30 | 2016-01-20 | 昆山鸿志犀自动化机电设备有限公司 | Pressing module for testing drawing force of keycap and test machine for drawing force of keycap |
| CN205843859U (en) * | 2016-05-24 | 2016-12-28 | 上海金克半导体设备有限公司 | A kind of measure the device fastening power between finger |
| CN106289609A (en) * | 2016-08-02 | 2017-01-04 | 浙江吉利控股集团有限公司 | Pull-out force detector |
| CN106197809A (en) * | 2016-08-26 | 2016-12-07 | 安徽安凯华夏汽车配件（合肥）有限公司 | A kind of lock force test device |
| CN206147485U (en) * | 2016-11-10 | 2017-05-03 | 黑龙江大学 | Computer motherboard joint installation locking device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109163833A (en) | 2019-01-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5435533A (en) | Adjustable clamping fixture for vibrating various sized circuit boards | |
| CN109163833B (en) | Device for measuring maximum locking force of clamp plate fastening strip | |
| US6435902B1 (en) | Sensor mount | |
| CN207281111U (en) | The drawing memory fixed plate of PCBA tests | |
| CN217638358U (en) | Double-end stud screwing performance testing tool | |
| CN208568933U (en) | A kind of test radio frequency fixed ampllitude phase-compensated cable tooling | |
| CN213274303U (en) | Clamping tool and check out test set | |
| CN208238693U (en) | A kind of detection jig of fin thickness | |
| CN108673381A (en) | Disassembly and assembly structure and measurement jig | |
| CN216525894U (en) | Rapid mounting clamp for acceleration sensor and centrifugal test bench | |
| TW202102873A (en) | Needle seat structure and test fixture using the needle seat structure | |
| CN216298747U (en) | Cutting force auxiliary measuring device and machine tool | |
| CN208496803U (en) | Disassembly and assembly structure and test fixture | |
| CN217032947U (en) | Steel wire rope rigidity testing tool | |
| CN219391291U (en) | Universal clamp for vibration test | |
| CN221147504U (en) | Batch part hole measuring jig | |
| CN218443818U (en) | Aluminum support height testing device | |
| CN219842122U (en) | Fixing tool for vibration test of special-shaped circuit board | |
| CN219935170U (en) | Spare part residual torsion test fixture | |
| CN217845003U (en) | Wheel bolt hole thickness cardboard examines utensil | |
| CN210037897U (en) | Fixing device of chip detection equipment | |
| CN215725517U (en) | Go-no-go detection tool | |
| CN211085022U (en) | Hexagonal screw gauge | |
| CN220367151U (en) | Adjustable conical shell hardness checking and positioning tool | |
| CN215064870U (en) | Mounting seat and detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |