CN110595707B - Equipment for detecting elastic coefficient of cylindrical spring - Google Patents
Equipment for detecting elastic coefficient of cylindrical spring Download PDFInfo
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- CN110595707B CN110595707B CN201910935713.XA CN201910935713A CN110595707B CN 110595707 B CN110595707 B CN 110595707B CN 201910935713 A CN201910935713 A CN 201910935713A CN 110595707 B CN110595707 B CN 110595707B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
Abstract
The invention relates to the field of testing, in particular to a device for detecting the elastic coefficient of a cylindrical spring, which comprises a machine body and a testing cavity arranged in the front side end wall of the machine body and provided with a forward opening, the test cavity is provided with a pressure block and three or more weights with equal mass which are sequentially stacked above the pressure block in a sliding way, a first through hole and a second through hole which are communicated up and down are respectively arranged in the pressure block and the weight, the pressure block and the weight fall in sequence, the equipment for detecting the elastic coefficient of the cylindrical spring provided by the invention can realize automatic test of the elastic coefficient of the spring, has simple structure and convenient operation, can automatically change the pressure above the spring, meanwhile, a plurality of groups of data are recorded, and the data can be displayed on a display screen, so that the test is more accurate, and the test result is more visual.
Description
Technical Field
The invention relates to the field of testing, in particular to equipment for detecting the elastic coefficient of a cylindrical spring.
Background
With the progress of society and the development of science and technology, automation equipment is everywhere around, and often there is not enough spring in the automation equipment, and the quality of spring has decided automation equipment quality to a certain extent, has many problems in the spring production test process, and how especially accurate test the elasticity coefficient of a spring seems to be difficult, so it is necessary to set up a device for detecting the elasticity coefficient of a cylindrical spring to improve above-mentioned problems.
Disclosure of Invention
The invention aims to provide a device for detecting the elastic coefficient of a cylindrical spring, which can overcome the defects of the prior art, thereby improving the practicability of the device.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a device for detecting the elastic coefficient of a cylindrical spring, which comprises a machine body and a test cavity arranged in the front side end wall of the machine body and provided with a forward opening, wherein a pressure block and three or more weights with equal mass are sequentially stacked above the pressure block in the test cavity in a sliding manner, a first falling through hole and a second falling through hole which are vertically communicated are respectively arranged in the pressure block and the weights, the pressure block and the weights are sequentially arranged so as to compress a test spring sleeved on the outer surface of a fixed rod fixedly arranged on the bottom wall of the test cavity, the pressure block moves downwards in the compression process of the test spring so as to adjust the resistance value of a sliding rheostat arranged in the right side end wall of the test cavity and connected into a test circuit, so as to drive the current change in the test circuit, an ammeter connected in series in the test circuit records the current change in the test circuit and converts the current change into the length of the sliding rheostat connected into the test circuit, the compression length of the spring when the pressure block and the weight are sequentially superposed above the test spring can be easily calculated according to the length of the slide rheostat connected to the test circuit, then the compression length of the test spring and the mass of the compression spring object corresponding to the compression length are displayed on a display fixedly arranged on the right end wall of the machine body by equipment, and the elastic coefficient of the spring can be easily calculated according to the mass of the object gradually borne above the test spring and the corresponding compression length;
the wire winding chamber that sets up in the test chamber roof, the wire winding intracavity is provided with and is used for the take-up device that the pressure piece promoted, the pressure piece is in during take-up device effect moves down with the test spring butt, and test circuit forms the return circuit, this moment the auto-change over device action that sets up in the fuselage left side end wall, thereby will the thrustor that sets up in the test chamber left side end wall with take-up device power is connected, this moment the thrustor drives the ejector pin of its inside setting and moves up and will fix the locking lever of weight shifts out from bottom to top the locking hole that sets up in the weight left side end wall, thereby realizes the gradual tenesmus of weight.
Furthermore, the wire pulling bottom wound on the outer surface of the winding wheel and symmetrically arranged in the winding device is penetrated through a first threading hole arranged in the bottom wall of the winding cavity and the tail end of a second threading hole arranged in the weight and fixedly connected with the pressure block, a belt cavity is arranged in the end wall of the left side of the winding cavity, a first rotating shaft used for fixing the winding wheel is rotatably arranged between the belt cavity and the winding cavity, a first belt wheel is fixedly arranged at the tail end of the first rotating shaft in the belt cavity, a power cavity extending downwards is arranged in the end wall of the right side of the belt cavity, a second rotating shaft connected with the first motor fixedly arranged in the end wall of the left side of the belt cavity is rotatably arranged between the power cavity and the belt cavity, and a second belt wheel connected with the first belt wheel in a belt transmission matched manner is fixedly arranged on the outer surface of the second rotating shaft in the belt cavity, and a first gear is fixedly arranged at the tail end of the second rotating shaft in the power cavity.
Further, the auto-change over device includes the slip chamber that sets up in the power chamber left side end wall, slip intracavity slidable is provided with the sliding block, slip chamber diapire internal fixation is provided with electric putter, slidable in the electric putter be provided with sliding block fixed connection's telescopic link, it is provided with the third pivot to rotate on the sliding block right side end wall, third pivot external fixation is provided with the second gear and the first pivot pole that sets up is rotated on the left of the second gear.
Further, the pushing device comprises a cam cavity arranged in the end wall of the left side of the test cavity, a fourth rotating shaft is rotatably arranged between the cam cavity and the power cavity, a cam is fixedly arranged at the tail end of the fourth rotating shaft in the cam cavity, a third gear and a second rotating rod which is positioned on the right side of the third gear are fixedly arranged on the outer surface of the fourth rotating shaft in the power cavity, a fifth rotating shaft is rotatably arranged between the second rotating rod and the first rotating rod, a fourth gear meshed with the second gear and the third gear is fixedly arranged on the outer surface of the fifth rotating shaft, a sliding groove is downwards arranged in the top wall of the cam cavity, the push rod is slidably arranged in the sliding groove, a compression spring is arranged between the push rod and the top wall of the cam cavity, and a guide sliding groove equal to the number of the weights is arranged in the end wall of the left side of the test cavity, the locking rod is arranged in the guide sliding groove in a sliding mode, an extension spring is arranged between the locking rod and the end wall of the left side of the guide sliding groove, and a wedge hole which is communicated up and down is formed in the locking rod.
Further, the test circuit includes the negative pole that sets up in the fuselage diapire with the power of the first annular electricity connection piece electricity federation that test chamber diapire internal fixation set up, the power positive through first cable with the anodal electricity federation of electric putter, the electric putter negative pole through the second cable with first annular electricity connection piece electricity federation, be provided with the second annular electricity connection piece in the sliding tray diapire, be provided with the electricity connection groove of opening right in the sliding tray right side end wall, slidable is provided with the electricity connection pole in the electricity connection groove, the electricity connection pole with be provided with reset spring between the electricity connection groove left side end wall, the electricity connection pole passes through the third cable with the second annular electricity connection piece electricity federation, the ampere meter is kept away from power one side contact with slide rheostat bottom electricity federation.
The invention has the beneficial effects that: the equipment for detecting the elastic coefficient of the cylindrical spring, provided by the invention, can realize automatic test of the elastic coefficient of the spring, has a simple structure, is convenient to operate, can automatically change the pressure above the spring, simultaneously records a plurality of groups of data, and can display the data on a display screen, so that the test is more accurate, and the test result is more visual.
Drawings
In order to more clearly illustrate the embodiments of the 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, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic diagram of the overall structure of an apparatus for detecting the elastic coefficient of a cylindrical spring according to the present invention.
Fig. 2 is a schematic view of the structure a-a in fig. 1.
Fig. 3 is an enlarged schematic view of B in fig. 1.
Fig. 4 is an enlarged schematic view of C in fig. 1.
Detailed Description
The invention will now be described in detail with reference to fig. 1-4, wherein for ease of description the orientations described hereinafter are now defined as follows: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The device for detecting the elastic coefficient of a cylindrical spring described with reference to fig. 1-4 comprises a body 10 and a testing chamber 34 disposed in the front side end wall of the body 10 and having a forward opening, a pressure block 58 and three or more equal-mass weights 40 sequentially stacked above the pressure block 58 are slidably disposed in the testing chamber 34, a first through hole 52 and a second through hole 38 penetrating up and down are respectively disposed in the pressure block 58 and the weights 40, the pressure block 58 and the weights 40 sequentially fall to compress a testing spring sleeved on the outer surface of a fixing rod 35 fixedly disposed on the bottom wall of the testing chamber 34, the pressure block 58 moves down during the compression of the testing spring to adjust the resistance value of a sliding rheostat 33 disposed in the right side end wall of the testing chamber 34 and connected into a testing circuit, so as to drive the current in the testing circuit to change, the ammeter 32 connected in series in the test circuit records the current change in the test circuit and converts the current change into the length of the slide rheostat 33 connected to the test circuit, the spring compression length when the pressure block 58 and the weight 40 are sequentially superposed above the test spring can be easily calculated according to the length of the slide rheostat 33 connected to the test circuit, then the device displays the compression length of the test spring and the mass of the object of the compression spring corresponding to the compression length on the display 42 fixedly arranged on the end wall of the right side of the machine body 10, and the spring elastic coefficient can be easily calculated according to the mass of the object gradually loaded above the test spring and the corresponding compression length;
Beneficially, bilateral symmetry rotates the winding reel 45 surface winding's that sets up in winding device 98 bottom of acting as go-between 43 and passes first through wires hole 41 that sets up in wire winding chamber 44 diapire and second through wires hole 39 that sets up in weight 40 is terminal with pressure piece 58 fixed connection, be provided with belt chamber 13 in the wire winding chamber 44 left side end wall, belt chamber 13 with it is used for to rotate between the wire winding chamber 44 first pivot 46 that reel 45 is fixed, in belt chamber 13 first pivot 46 end fixed is provided with first pulley 11, be provided with downwardly extending's power cavity 14 in the belt chamber 13 right side end wall, power cavity 14 with rotate between the belt chamber 13 be provided with the second pivot 18 that the first motor 17 power of belt chamber 13 left side end wall internal fixation set up is connected, in belt chamber 13 second pivot 18 external fixation be provided with between first pulley 11 by belt 12 transmission fit And a first gear 15 is fixedly arranged at the tail end of the second rotating shaft 18 in the power cavity 14.
Beneficially, the switching device 97 includes a sliding cavity 19 disposed in the left end wall of the power cavity 14, a sliding block 20 slidably disposed in the sliding cavity 19, an electric push rod 24 fixedly disposed in the bottom wall of the sliding cavity 19, a telescopic rod 23 fixedly connected to the sliding block 20 slidably disposed in the electric push rod 24, a third rotating shaft 21 rotatably disposed on the right end wall of the sliding block 20, and a second gear 47 and a first rotating rod 22 rotatably disposed on the left side of the second gear 47 are fixedly disposed on the outer surface of the third rotating shaft 21.
Beneficially, the pushing device 96 comprises a cam cavity 29 arranged in the end wall of the left side of the test cavity 34, a fourth rotating shaft 27 is arranged between the cam cavity 29 and the power cavity 14 in a rotating manner, a cam 28 is fixedly arranged at the tail end of the fourth rotating shaft 27 in the cam cavity 29, a third gear 51 and a second rotating rod 50 which is positioned at the right side of the third gear 51 and can rotate are fixedly arranged on the outer surface of the fourth rotating shaft 27 in the power cavity 14, a fifth rotating shaft 49 is arranged between the second rotating rod 50 and the first rotating rod 22 in a rotating manner, a fourth gear 48 meshed with the second gear 47 and the third gear 51 is fixedly arranged on the outer surface of the fifth rotating shaft 49, a sliding groove 59 is downwards arranged in the top wall of the cam cavity 29, a pushing rod 36 is slidably arranged in the sliding groove 59, and a compression spring 37 is arranged between the pushing rod 36 and the top wall of the cam cavity 29, the testing device is characterized in that guide sliding grooves 60 with the same number as the weights 40 are arranged in the left side end wall of the testing cavity 34, the locking rod 64 is arranged in the guide sliding grooves 60 in a sliding mode, an extension spring 62 is arranged between the locking rod 64 and the left side end wall of the guide sliding grooves 60, and wedge holes 63 which are through up and down are arranged in the locking rod 64.
Advantageously, the test circuit comprises a power supply 31 electrically coupled to a negative pole provided in the bottom wall of the body 10 and to a first annular electric contact 30 fixedly provided in the bottom wall of the test chamber 34, the positive pole of the power supply 31 is electrically connected with the positive pole of the electric push rod 24 through a first cable 25, the negative pole of the electric push rod 24 is electrically connected with the first annular electric connecting piece 30 through a second cable 26, a second annular electric connecting piece 53 is arranged in the bottom wall of the sliding groove 59, an electric connecting groove 56 with a right opening is arranged in the right side end wall of the sliding groove 59, an electric rod 57 is slidably arranged in the electric connecting groove 56, a return spring 55 is arranged between the electric rod 57 and the left end wall of the electric connecting groove 56, the electric connecting rod 57 is electrically connected with the second annular electric connecting piece 53 through the third cable 54, the contact point of the ammeter 32 on the side far away from the power supply 31 is electrically connected with the bottom of the slide rheostat 33.
The fixing and connecting method in this embodiment includes, but is not limited to, bolting, welding, and the like.
As shown in fig. 1 to 4, in the initial state of the apparatus of the present invention, the slide block 20 is located at the lowest position of the slide cavity 19, and the first gear 15 is separated from the second gear 47.
Sequence of mechanical actions of the whole device:
1. when the device of the invention is used for testing, the spring to be tested is sleeved on the outer surface of the fixed rod 35, at the moment, the first motor 17 is started to drive the second rotating shaft 18 to rotate, thereby driving the second belt wheel 16 to rotate, the second belt wheel 16 rotates and drives the first belt wheel 11 to rotate, thereby driving the first rotating shaft 46 to rotate, and further driving the reel 45 to rotate, at the moment, the pressure block 58 moves downwards under the action of gravity, the pressure block 58 moves downwards to drive the electric connecting rod 57 to move downwards to abut against the left side of the slide rheostat 33, at the moment, the electric connecting rod 57 is electrically connected with the slide rheostat 33, at the moment, the pressure block 58 continues to move downwards, when the connecting rod 57 moves down to abut against the test spring, a loop is formed in the test circuit, and at this time, the current is detected in the ammeter 32, the pressure block 58 continues to move down to record the current in the test circuit when the current detected in the ammeter 32 is not changing;
2. at this time, the right movement test circuit forms a loop, the electric push rod 24 is electrified, so as to push the telescopic rod 23 to move upwards, so as to drive the sliding block 20 to move upwards, the sliding block 20 moves upwards to drive the second gear 47 to move upwards to be meshed with the first gear 15, at this time, the first motor 17 rotates to drive the second rotating shaft 18 to rotate, so as to drive the first gear 15 to rotate, the first gear 15 rotates to drive the second gear 47, the fourth gear 48 and the third gear 51 to rotate, so as to drive the cam 28 to rotate, when the cam 28 rotates to abut against the push rod 36, the push rod 36 moves upwards, when the push rod 36 moves upwards to abut against the left end wall of the wedge hole 63 at the lowest side, the lock rod 64 moves leftwards out of the lock hole 65, and at this time, the weight 40 falls onto the pressure block 58 under the action of gravity, at the moment, the pressure block 58 moves downwards to drive the electric connecting rod 57 to move downwards so as to adjust the resistance value of the slide rheostat 33 connected into a test circuit, the current detected in the ammeter 32 changes, the current value is recorded when the current detected in the ammeter 32 is stable, the push rod 36 moves upwards continuously so as to drive the weight 40 to fall from bottom to top, the ammeter 32 records the detected current value, the compression length of the test spring and the mass of the compression spring object corresponding to the compression length are displayed on the display 42 after processing, and the elastic coefficient of the test spring can be calculated according to the compression length of the test spring and the mass of the compression spring object corresponding to the compression length;
3. after the test is finished, the first motor 17 is started to rotate reversely, so that the reel 45 is driven to rotate reversely, the pressure block 58 is driven to move upwards, the weight 40 stacked above the pressure block 58 is driven to move upwards, when the locking hole 65 is aligned with the guide chute 60, the locking rod 64 is inserted into the locking hole 65 under the action of the extension spring 62, so that the weight 40 is fixed, at the moment, as the second annular connecting piece 53 is separated from the test spring, the test circuit is powered off, at the moment, the electric push rod 24 drives the telescopic rod 23 to move downwards, so that the sliding block 20 is driven to move downwards, the first gear 15 is separated from the second gear 47, at the moment, the test spring is taken out, and the equipment is restored to the initial state.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (2)
1. The utility model provides an equipment for cylindrical spring elastic coefficient detects, includes the fuselage and set up in the forward test chamber of opening in the fuselage front side endwall, its characterized in that: the testing cavity is internally provided with a pressure block in a sliding way and three or more weights with equal mass which are sequentially stacked above the pressure block, the pressure block and the weights are respectively internally provided with a first through hole and a second through hole which are communicated up and down, the pressure block and the weights sequentially fall so as to compress a testing spring sleeved on the outer surface of a fixed rod fixedly arranged on the bottom wall of the testing cavity, the pressure block moves downwards in the compression process of the testing spring so as to adjust the resistance value of a sliding rheostat arranged in the right end wall of the testing cavity and connected into a testing circuit, so as to drive the current change in the testing circuit, an ammeter connected in series in the testing circuit records the current change in the testing circuit and converts the current change into the length of the sliding rheostat connected into the testing circuit, and the spring compression length when the pressure block and the weights are sequentially stacked above the testing spring can be easily calculated according to the length of the sliding rheostat connected into the testing circuit, then the device displays the compression length of the test spring and the mass of the compression spring object corresponding to the compression length on a display fixedly arranged on the right end wall of the machine body, and the elastic coefficient of the spring can be easily calculated according to the mass of the object gradually loaded above the test spring and the corresponding compression length; a winding cavity is arranged in the top wall of the test cavity, a winding device used for lifting the pressure block is arranged in the winding cavity, when the pressure block moves downwards under the action of the winding device and is abutted against a test spring, a test circuit forms a loop, at the moment, a switching device arranged in the left end wall of the machine body acts, so that a pushing device arranged in the left end wall of the test cavity is in power connection with the winding device, at the moment, the pushing device drives a pushing rod arranged in the pushing device to move upwards to move a locking rod for fixing the weight out of a locking hole arranged in the left end wall of the weight from bottom to top, so that the weight is gradually descended, the bottom of a stay wire wound on the outer surface of a reel symmetrically and rotatably arranged in the winding device penetrates through a first threading hole arranged in the bottom wall of the winding cavity and the tail end of a second threading hole arranged in the weight and is fixedly connected with the pressure block, a belt cavity is arranged in the end wall of the left side of the winding cavity, a first rotating shaft for fixing the reel is rotatably arranged between the belt cavity and the winding cavity, a first belt wheel is fixedly arranged at the tail end of the first rotating shaft in the belt cavity, a power cavity extending downwards is arranged in the end wall of the right side of the belt cavity, a second rotating shaft in power connection with a first motor fixedly arranged in the end wall of the left side of the belt cavity is rotatably arranged between the power cavity and the belt cavity, a second belt wheel in transmission fit connection with the first belt wheel is fixedly arranged on the outer surface of the second rotating shaft in the belt cavity, a first gear is fixedly arranged at the tail end of the second rotating shaft in the power cavity, the switching device comprises a sliding cavity arranged in the end wall of the left side of the power cavity, and a sliding block is slidably arranged in the sliding cavity, an electric push rod is fixedly arranged in the bottom wall of the sliding cavity, a telescopic rod fixedly connected with the sliding block is slidably arranged in the electric push rod, a third rotating shaft is rotatably arranged on the end wall of the right side of the sliding block, and a second gear and a first rotating rod rotatably arranged on the left side of the second gear are fixedly arranged on the outer surface of the third rotating shaft; the thrustor comprises a cam cavity arranged in the end wall of the left side of the test cavity, a fourth rotating shaft is rotatably arranged between the cam cavity and the power cavity, a cam is fixedly arranged at the tail end of the fourth rotating shaft in the cam cavity, a third gear and a second rotating rod which is positioned on the right side of the third gear are fixedly arranged on the outer surface of the fourth rotating shaft in the power cavity, a fifth rotating shaft is rotatably arranged between the second rotating rod and the first rotating rod, a fourth gear meshed with the second gear and the third gear is fixedly arranged on the outer surface of the fifth rotating shaft, a sliding groove is downwards arranged in the top wall of the cam cavity, the ejector rod is slidably arranged in the sliding groove, a compression spring is arranged between the ejector rod and the top wall of the cam cavity, and a guide sliding groove equal to the number of weights is arranged in the end wall of the left side of the test cavity, the locking rod is arranged in the guide sliding groove in a sliding mode, an extension spring is arranged between the locking rod and the end wall of the left side of the guide sliding groove, and a wedge hole which is communicated up and down is formed in the locking rod.
2. The apparatus for cylinder spring rate measurement according to claim 1, wherein: the testing circuit comprises a negative electrode arranged in the bottom wall of the machine body and a power supply of a first annular power connection piece which is fixedly arranged in the bottom wall of the testing cavity, a power positive electrode is electrically connected with an electric push rod positive electrode through a first cable, an electric push rod negative electrode is electrically connected with the first annular power connection piece through a second cable, a second annular power connection piece is arranged in the bottom wall of the sliding groove, a power connection groove with a right opening is formed in the end wall of the right side of the sliding groove, a power connection rod is slidably arranged in the power connection groove and is provided with a reset spring between the walls of the left side end of the power connection groove, the power connection rod is electrically connected with the second annular power connection piece through a third cable, and the ammeter is kept away from a contact on one side of the power supply and electrically connected with the bottom of the sliding rheostat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935713.XA CN110595707B (en) | 2019-09-29 | 2019-09-29 | Equipment for detecting elastic coefficient of cylindrical spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910935713.XA CN110595707B (en) | 2019-09-29 | 2019-09-29 | Equipment for detecting elastic coefficient of cylindrical spring |
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| CN110595707A CN110595707A (en) | 2019-12-20 |
| CN110595707B true CN110595707B (en) | 2021-07-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910935713.XA Active CN110595707B (en) | 2019-09-29 | 2019-09-29 | Equipment for detecting elastic coefficient of cylindrical spring |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111076920B (en) * | 2020-01-14 | 2021-10-22 | 南京金升华包装材料有限公司 | Spring fatigue test machine |
| CN114964738A (en) * | 2021-02-26 | 2022-08-30 | 西北核技术研究所 | Portable spring elastic coefficient measuring device and measuring method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1292877A (en) * | 1998-03-16 | 2001-04-25 | 康宁股份有限公司 | Current measuring devices and method |
| CN202770851U (en) * | 2012-08-14 | 2013-03-06 | 东华大学 | Angular velocity measuring apparatus |
| CN207380954U (en) * | 2017-07-18 | 2018-05-18 | 韦咏智 | A kind of high school student's Physical Experiment coefficient of elasticity measurement device |
| CN108488302A (en) * | 2018-05-10 | 2018-09-04 | 西安科技大学 | A kind of spring-electromagnetism auxiliary damping device |
| CN208606914U (en) * | 2018-07-24 | 2019-03-15 | 江苏省电子信息产品质量监督检验研究院 | The dynamometer of changeable range for the installation detection of wall-mounted equipment dependability |
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Effective date of registration: 20210707 Address after: 214028 south side of 3 / F, building a, standard workshop (6 Xikun Road), plot 79, Xinwu District, Wuxi City, Jiangsu Province Applicant after: Wuxi hengruixin Hardware Co.,Ltd. Address before: 237300 Liwan formation, Qilian village, Gubei Town, Jinzhai County, Lu'an City, Anhui Province Applicant before: Yuan Weiwei |
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