CN202267553U - Detection device for elasticity of plate spring - Google Patents
Detection device for elasticity of plate spring Download PDFInfo
- Publication number
- CN202267553U CN202267553U CN2011203086114U CN201120308611U CN202267553U CN 202267553 U CN202267553 U CN 202267553U CN 2011203086114 U CN2011203086114 U CN 2011203086114U CN 201120308611 U CN201120308611 U CN 201120308611U CN 202267553 U CN202267553 U CN 202267553U
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- push rod
- leaf spring
- tip
- lever support
- elastic deformation
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Abstract
The utility model discloses a detection device for elasticity of a plate spring. The detection device comprises a plate spring stand and a force application device. The force application device comprises a guiding mechanism. The guiding mechanism is movably provided with a push rod seat along a front and back direction. A push rod is movably disposed on the push rod seat in a guiding manner. An elastic member is arranged between the push rod seat and the push rod. The front part of the push rod is provided with a contact end. During measurement, one end of a plate spring is fixed on the plate spring stand, the free end of the plate spring is rightly pointed to the contact end of the push rod, the push rod seat is pushed to drive the push rod to move forward, the free end of the plate spring is pressed by the contact end of the push rod to swing forward, and elastic deformation is generated on the elastic member between the push rod and the push rod seat. When the free end of the plate spring swings forward till the elastic deformation amount of the plate spring reaches an elastic deformation amount required by detection of the plate spring, the elastic deformation amount of the plate spring is compared with a preset standard range. If the elastic deformation amount of the plate spring is within the preset standard range, the plate spring is qualified; otherwise, the plate spring is not qualified.
Description
Technical field
The utility model belongs to leaf spring elastic force detection technique field, is specifically related to a kind of leaf spring elastic force pick-up unit.
Background technology
In high voltage electric appliance, it is very many that the small-sized leaf spring as shown in Figure 1 of various models is used at present.Leaf spring is converted to afterburning state B by state of nature A behind pressurized; Distance between free end D when leaf spring is in afterburning state B and the datum line C is the distortion size H that requires; Qualified leaf spring requires when the distortion size reaches H, to possess elastic force F, and the elastic force of leaf spring surpasses or is defective spring less than F when the distortion size reaches H.Consider influences such as mismachining tolerance, the corresponding scope of elastic force F, the leaf spring that the elastic force of leaf spring drops in the scope when the distortion size reaches H like this is just qualified, and the person is just not defective.
Because the use amount of leaf spring is very big; It is very high to detect frequency, and the detection task is also comparatively heavy, and adopts the measurement of existing spring force measuring machine to take the plenty of time of spring force measuring machine; Influence the normal detection of other elastic components; Low load with strong power causes unnecessary waste, therefore, needs a kind of simple in structure being convenient to of design that leaf spring is carried out the pick-up unit that elastic force detects.
The utility model content
The purpose of the utility model is to provide a kind of leaf spring elastic force pick-up unit simple in structure, uses the spring test machine to detect leaf spring and influence the normal technical matters that detects of other elastic components in the prior art to solve.
For realizing above-mentioned purpose; The leaf spring elastic force pick-up unit that the utility model provided adopts following technical scheme: a kind of leaf spring elastic force pick-up unit; Comprise that being used for fixing leaf spring one end and making the leaf spring other end is free-ended spring block and be used for the free end application of force to leaf spring so that leaf spring produces the force application apparatus of elastic deformation; Force application apparatus comprises guiding mechanism; Fore-and-aft direction moves and is equipped with tip-lever support in the guiding mechanism upper edge; Said spring block is positioned at force application apparatus the place ahead; Fore-and-aft direction guiding moves and is equipped with push rod in the tip-lever support upper edge, between tip-lever support and push rod, is provided with when tip-lever support moves forward the elastic component that applies acting force forward to push rod, and the push rod front portion has and is used for when tip-lever support drives push rod and travels forward roof pressure and oppresses the contact end that leaf spring produces the elastic deformation that the leaf spring free end swings forward at the leaf spring free end.
Described leaf spring elastic force pick-up unit also comprises and being used at push rod compressing leaf spring free end so that leaf spring shows the elastic deformation amount's of leaf spring elastic deformation amount and said elastic component indicating device when producing elastic deformation.
Described push rod guiding moves and is assemblied in the pilot hole that offers on the tip-lever support; Pilot hole extends back along the front end face of fore-and-aft direction by tip-lever support; Said elastic component is the stage clip that is sleeved on the push rod, and at the bottom of the rear end of stage clip withstands on the hole of pilot hole, its front end withstands on the spring base that is convexly equipped with on the push rod, the place, front end aperture of said pilot hole is provided with internal thread; Thread connection has locating sleeve at the place, aperture of pilot hole, and the rear end face of locating sleeve cooperates with the front end face thrust of spring base.
Described force application apparatus comprises base; Said guiding mechanism is fixedly installed on the base; Be provided with at the rear portion of base and be used to promote tip-lever support handle to front slide on guiding mechanism; One end of handle is that the hinged end, the other end that are hinged on the base are the operating side of operating grip around the hinged end rotation, and handle is in transmission connection through a drive link and tip-lever support.
Described indicating device comprise be installed in being used on the push rod indicate the contact end of push rod move forward the position first pointer be used to indicate second pointer of push rod with respect to the displacement of tip-lever support.
Described first pointer is installed in the front portion that passes tip-lever support of push rod, desired elastic deformation amount when the distance of the indication end face of first pointer and the contact end of push rod equals to detect leaf spring, and described second pointer is installed in the rear end that passes tip-lever support of push rod.
Described spring block is along extending perpendicular to the guide direction of fore-and-aft direction and being installed on the said base; On spring block, be provided with the register pin that is used for fixing leaf spring one end; On spring block, also be provided with the backing pin that is used to indicate the leaf spring datum line, this leaf spring datum line is used for reaching the detection requirement with the corresponding cooperation of first pointer indication end face with expression leaf spring elastic deformation amount.
The beneficial effect of the utility model is: the leaf spring elastic force pick-up unit that the utility model provided comprises spring block and force application apparatus; Spring block is positioned at the place ahead of force application apparatus; On the guiding mechanism of force application apparatus, move and be equipped with tip-lever support; Guiding moves and is equipped with push rod on tip-lever support, and between tip-lever support and push rod, is provided for applying to push rod the elastic component of acting force forward.During use, leaf spring is fixed on the spring block, and with the free end of leaf spring over against the push rod contact end; Promote tip-lever support drive push rod and move forward, the contact end compressing leaf spring free end of push rod is swung forward, and the elastic component between push rod and tip-lever support produces elastic deformation;, when the leaf spring free end is rocked to the leaf spring elastic deformation amount forward and reaches when detecting leaf spring desired elastic deformation amount, the elastic deformation amount and the preset standard scope of elastic component compared; The elastic deformation amount of elastic component is positioned within the preset standard scope; Leaf spring is qualified, otherwise leaf spring is defective.The leaf spring pick-up unit that the utility model provided utilizes the relative movement distance between push rod and the tip-lever support to judge whether the elastic force of leaf spring to be measured when producing elastic deformation H is qualified when push rod slides into desired location forward.The leaf spring pick-up unit one-piece construction that the utility model provided is simple, easy to use, effectively raises the efficiency of measurement of leaf spring, need not re-use the spring force measuring machine and influences the detection of other elastic components.
Description of drawings
Fig. 1 is a leaf spring structural representation to be detected;
Fig. 2 is the structural representation of the leaf spring elastic force pick-up unit that provides of the utility model;
Fig. 3 is the vertical view of Fig. 2;
Fig. 4 is the structural representation of base among Fig. 2;
Fig. 5 is the vertical view of Fig. 4;
Fig. 6 is the structural representation of tip-lever support among Fig. 2;
Fig. 7 is the left side view of Fig. 6;
(double dot dash line partly is a leaf spring to be measured among the figure).
Embodiment
Extremely shown in Figure 7 like Fig. 2; A kind of embodiment of leaf spring elastic force pick-up unit; The pick-up unit that is provided in the present embodiment comprises that being used for fixing leaf spring 300 1 ends and making the leaf spring other end is free-ended spring block 12 and the force application apparatus 200 that is used for the test board spring force; Force application apparatus 200 comprises base 1, and base 1 is provided with guiding mechanism, and fore-and-aft direction moves and is equipped with tip-lever support 6 in the guiding mechanism upper edge; Described spring block 12 is positioned at the place ahead of force application apparatus 200; Spring block 12 is provided with the register pin 9 that is used for fixing leaf spring one end along extending perpendicular to the guide direction of fore-and-aft direction and being installed on the base 1 on spring block 12, on spring block 12, also be provided with to be used on spring block, indicating the leaf spring datum line to prevent the excessive backing pin of leaf spring elastic deformation 10; Be fixed on the spring block through the end of register pin 9 during measurement, and make the other end keep free leaf spring.Described force application apparatus 200 is made up of base 1, tip-lever support 6, push rod 5, elastic component, indicating device, and wherein, base 1 is provided with guiding mechanism; This guiding mechanism is the chute that base upper edge fore-and-aft direction extends, and tip-lever support 6 reciprocatingly slides and is assemblied in the chute, is provided with at the rear portion of base 1 to be convenient to the handle 14 that manual operation reciprocatingly slides in chute with the push-and-pull tip-lever support; Handle 14 is swung along camber line C; Tip-lever support 6 is provided with the pilot hole that extends along fore-and-aft direction, and pilot hole is extended back by the front end face of tip-lever support, and described push rod 5 is slidedly assemblied in the pilot hole 60; This pilot hole is a shoulder hole; The rear end of push rod passes tip-lever support through the miner diameter end of shoulder hole, and the front end of push rod passes tip-lever support through the bigger diameter end of shoulder hole, on the bar section that is arranged in pilot hole of push rod, is set with the stage clip 4 as elastic component; The rear end roof pressure of stage clip 4 on the cascaded surface of shoulder hole, its front end roof pressure is on the spring base that is convexly equipped with on the push rod; For the elastic force that guarantees stage clip and prevent push rod ejection pilot hole under the stage clip effect, be installed with locating sleeve 7 at the place, front end aperture of pilot hole, be provided with internal thread at the place, front end aperture of pilot hole; Locating sleeve is fixed on the tip-lever support through thread connection; Under the effect of stage clip, the front end face of the spring base of push rod cooperates with the rear end face thrust of locating sleeve, and the front end that passes tip-lever support of push rod is the contact end 51 that the free end that is used to oppress leaf spring produces elastic deformation; Described leaf spring elastic force pick-up unit also comprises and being used at push rod compressing leaf spring free end so that leaf spring shows the elastic deformation amount's of leaf spring elastic deformation amount and said elastic component indicating device when producing elastic deformation; Indicating device comprise be installed in being used on the push rod 5 indicate the contact end of push rod move forward the position first pointer 11 be used to indicate second pointer 3 of push rod with respect to the displacement of tip-lever support; Second pointer 3 is fixedly installed on the push rod rear end; Constitute indicating device by first pointer 11 and second pointer 3 in the present embodiment; Distance between the indication end 600 of first pointer 11 and the contact end 51 of push rod equals the elastic deformation size H of the leaf spring to be measured of requirement; Thimble 5 drives first pointer 11 and travels forward, and when the indication end of first pointer 11 slided into the position at corresponding groove 400 places of the leaf spring datum line that indicates on the spring block, thought that the contact end of push rod slides into desired location forward this moment; At this moment, leaf spring to be measured produces elastic deformation size H.
Use above-mentioned elastic force pick-up unit to measure the detection method of leaf spring, at first the fixed mandril seat 6, promote push rod 5 with maximum elastic force in the leaf spring claimed range to be measured and slide backward; The stage clip pressurized applies acting force forward to push rod; When push rod 5 front and back stress balances, this moment, stage clip reached maximum deformation quantity, and second pointer 3 indicates the second groove 1-2 on tip-lever support; Promoting push rod with minimum elastic force in the leaf spring claimed range to be measured then slides backward; The stage clip pressurized applies acting force forward to push rod, and when the stress balance of push rod front and back, this moment, stage clip reached least amount of deformation; Second pointer indicates the first groove 1-1 on tip-lever support; The first groove 1-1 and the second groove 1-2 form a scope, and this scope is the preset standard scope that is used for as standard, and this scope pairing elastic force scope of leaf spring when elastic deformation size when qualified leaf spring reaches H is corresponding.One end of leaf spring 300 is fixed on the spring block, and the other end of leaf spring is a free end, and operating grip 14 promotes tip-lever support to front slide; Tip-lever support drives push rod to front slide through stage clip, and contact end 51 roof pressures of push rod are on the free end of leaf spring, and tip-lever support continues to front slide; The contact end compressing leaf spring free end of push rod, leaf spring produces elastic deformation, and leaf spring produces reaction force acts on push rod because of elastic deformation; Make push rod and tip-lever support produce relatively and slide that the stage clip compressive deformation makes the front and back stress balance of push rod; Because the distance between the contact end of the indication end 600 of first pointer and push rod equals the elastic deformation size H of leaf spring to be measured; When push rod drove first pointer 11 and slides into the groove 400 pairing positions on the spring block, the contact end pressuring spring of push rod produced the elastic deformation that elastic deformation is of a size of H, and the pairing position of the contact end of push rod is predeterminated position; At this moment; Second pointer of the relative sliding distance of expression tip-lever support and push rod indicates test groove 500 on tip-lever support, in the time of within this tests the scope of groove between second groove and first groove, leaf spring is qualified; And when outside the test scope of groove between second groove and first groove, leaf spring is defective.
Chute in the present embodiment is made up of base 1 and two boundary plates 20 of extending along fore-and-aft direction that are fixed on the base; Because leaf spring number to be measured is more; And each measurement all need push away tip-lever support forward; After measuring completion tip-lever support is retracted; So just make tip-lever support in chute, to reciprocatingly slide, in sliding process, from chute, deviate from, be provided with the edge of a wing concordant 61 with the plate face of boundary plates in the both sides corresponding to boundary plates of tip-lever support for preventing tip-lever support; And on each boundary plates, the press strip 8 that extends along fore-and-aft direction being arranged through bolt, press strip and the edge of a wing roof pressure of tip-lever support be spacing to be cooperated to prevent that tip-lever support from deviating from from chute when reciprocatingly sliding.
The spring block as spring block in the present embodiment is fixedly installed on the base; In other embodiments also can be with corresponding respectively being installed on the test table of the base of spring block and force application apparatus, static relatively if base and spring block keep when tip-lever support slides.
Elastic component in the present embodiment preferably adopts stage clip, also can adopt extension spring to realize being in transmission connection between push rod and the tip-lever support in other embodiments, at this moment; Spring base and locating sleeve are separated; Extension spring is between the spring base and locating sleeve of push rod, and the front end of extension spring is fixed on the locating sleeve, its rear end is fixed on the spring base, and extension spring also can be sleeved on the push rod certainly; When tip-lever support under the handle thrust during to front slide; Tip-lever support moves forward through locating sleeve, extension spring pulling push rod, and when the contact end of push rod received the leaf spring elastic deformation and produces acting force backward, the extension spring distortion also provided acting force forward to push rod.
Indicating device in the present embodiment is divided into first pointer and second pointer; In other embodiments; Indicating device can adopt a test pointer; On tip-lever support, indicate second groove and first groove by the test pointer, the distance definition that will test simultaneously between the contact end of indication end and push rod of pointer is H0, as H0 during greater than requirement leaf spring elastic deformation size H; When the indication end of test pointer move to and spring block on distance between the datum line 400 that indicates during for the size of (H0-H), the contact end of push rod moves to predeterminated position; As H0 during less than requirement leaf spring elastic deformation size H; When the indication end of test pointer forward and when crossing distance between the datum line 400 that indicates on the spring block for the size of (H-H0); The contact end of push rod moves to predeterminated position; When the contact end of push rod moves to predeterminated position, on tip-lever support, indicate the test groove by the test pointer, thereby judge whether leaf spring is qualified.
Second pointer in the indicating device in the present embodiment indicates first groove and second groove on tip-lever support; In other embodiments; Can be provided with in addition and specialize in the reticle that indicating device indicates groove; This reticle can be installed on the base, also other positions can be set, but will keep static relatively with base.
The foregoing description is for preferred embodiment; In other embodiments, pick-up unit also can not comprise indicating device, can judge through naked eyes whether leaf spring variable property reaches the sex change requirement through operating personnel oneself; At this moment; Whether the decrement of elastic component is within the scope, and the method that certain this naked eyes are judged is inaccurate, can measure by the adapted dip stick.
A kind of leaf spring elastic force pick-up unit that uses in the foregoing description to be provided detects the detection method of leaf spring; At first; Leaf spring 300 1 ends are fixed on the spring block 12 of pick-up unit; And making the leaf spring other end is free end, and described pick-up unit comprises also and being used for the free end application of force of leaf spring so that leaf spring produces the force application apparatus 200 of elastic deformation that force application apparatus comprises guiding mechanism; Fore-and-aft direction moves and is equipped with tip-lever support 6 in the guiding mechanism upper edge; Said spring block 12 is positioned at force application apparatus 200 the place aheads, moves in tip-lever support 6 upper edge fore-and-aft directions guiding and is equipped with push rod 5, between tip-lever support 6 and push rod 5, is provided with when tip-lever support moves forward the elastic component that applies acting force forward to push rod; The push rod front portion has and is used for when tip-lever support drives push rod and travels forward roof pressure and oppresses the contact end 51 that leaf spring produces the elastic deformation that the leaf spring free end swings forward at the leaf spring free end, and makes the contact end of the free end of leaf spring over against push rod;
Then, promote tip-lever support 6 drive push rods and move forward, contact end 51 compressing leaf springs 300 free ends of push rod are swung forward, and the elastic component between push rod and tip-lever support produces elastic deformation;
At last; When the leaf spring free end was rocked to the leaf spring elastic deformation amount forward and reaches the elastic deformation amount who requires in advance when detecting leaf spring, the elastic deformation amount who records elastic component compared the elastic deformation amount and the preset standard scope of elastic component; The elastic deformation amount of elastic component is positioned within the preset standard scope; Leaf spring is qualified, otherwise leaf spring is defective.
Claims (7)
1. leaf spring elastic force pick-up unit; It is characterized in that: comprise that being used for fixing leaf spring one end and making the leaf spring other end is free-ended spring block and be used for the free end application of force to leaf spring so that leaf spring produces the force application apparatus of elastic deformation; Force application apparatus comprises guiding mechanism; Fore-and-aft direction moves and is equipped with tip-lever support in the guiding mechanism upper edge; Said spring block is positioned at force application apparatus the place ahead; Fore-and-aft direction guiding moves and is equipped with push rod in the tip-lever support upper edge, between tip-lever support and push rod, is provided with when tip-lever support moves forward the elastic component that applies acting force forward to push rod, and the push rod front portion has and is used for when tip-lever support drives push rod and travels forward roof pressure and oppresses the contact end that leaf spring produces the elastic deformation that the leaf spring free end swings forward at the leaf spring free end.
2. leaf spring elastic force pick-up unit according to claim 1 is characterized in that: described leaf spring elastic force pick-up unit also comprises and being used at push rod compressing leaf spring free end so that leaf spring shows the elastic deformation amount's of leaf spring elastic deformation amount and said elastic component indicating device when producing elastic deformation.
3. leaf spring elastic force pick-up unit according to claim 2; It is characterized in that: described push rod guiding moves and is assemblied in the pilot hole that offers on the tip-lever support; Pilot hole extends back along the front end face of fore-and-aft direction by tip-lever support; Said elastic component is the stage clip that is sleeved on the push rod, and at the bottom of the rear end of stage clip withstands on the hole of pilot hole, its front end withstands on the spring base that is convexly equipped with on the push rod, the place, front end aperture of said pilot hole is provided with internal thread; Thread connection has locating sleeve at the place, aperture of pilot hole, and the rear end face of locating sleeve cooperates with the front end face thrust of spring base.
4. leaf spring elastic force pick-up unit according to claim 2; It is characterized in that: described force application apparatus comprises base; Said guiding mechanism is fixedly installed on the base; Be provided with at the rear portion of base and be used to promote tip-lever support handle to front slide on guiding mechanism, an end of handle be hinged on hinged end, the other end on the base be operating grip around the operating side that hinged end rotates, handle is in transmission connection through a drive link and tip-lever support.
5. according to claim 2 or 3 or 4 described leaf spring elastic force pick-up units, it is characterized in that: described indicating device comprise be installed in being used on the push rod indicate the contact end of push rod move forward the position first pointer be used to indicate second pointer of push rod with respect to the displacement of tip-lever support.
6. leaf spring elastic force pick-up unit according to claim 5; It is characterized in that: described first pointer is installed in the front portion that passes tip-lever support of push rod; Desired elastic deformation amount when the distance of the indication end face of first pointer and the contact end of push rod equals to detect leaf spring, described second pointer is installed in the rear end that passes tip-lever support of push rod.
7. leaf spring elastic force pick-up unit according to claim 6; It is characterized in that: described spring block is along extending perpendicular to the guide direction of fore-and-aft direction and being installed on the said base; On spring block, be provided with the register pin that is used for fixing leaf spring one end; On spring block, also be provided with the backing pin that is used to indicate the leaf spring datum line, this leaf spring datum line is used for reaching the detection requirement with the corresponding cooperation of first pointer indication end face with expression leaf spring elastic deformation amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203086114U CN202267553U (en) | 2011-08-23 | 2011-08-23 | Detection device for elasticity of plate spring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203086114U CN202267553U (en) | 2011-08-23 | 2011-08-23 | Detection device for elasticity of plate spring |
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| Publication Number | Publication Date |
|---|---|
| CN202267553U true CN202267553U (en) | 2012-06-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203086114U Expired - Lifetime CN202267553U (en) | 2011-08-23 | 2011-08-23 | Detection device for elasticity of plate spring |
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| Country | Link |
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| CN (1) | CN202267553U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419225A (en) * | 2011-08-23 | 2012-04-18 | 平高集团有限公司 | Elasticity detection device for plate spring and method for detecting plate spring by using same |
| CN106289745A (en) * | 2016-08-11 | 2017-01-04 | 上海汽车集团股份有限公司 | Composite material plate spring high/low temperature fatigue and rolling capability testboard bay |
| CN107063535A (en) * | 2016-12-12 | 2017-08-18 | 贵州航天林泉电机有限公司 | A kind of leaf spring pressure-detecting device and its detection method |
| CN107621246A (en) * | 2017-09-19 | 2018-01-23 | 芜湖炬胜机电设备厂 | Spring detection utensil easy to operate |
-
2011
- 2011-08-23 CN CN2011203086114U patent/CN202267553U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102419225A (en) * | 2011-08-23 | 2012-04-18 | 平高集团有限公司 | Elasticity detection device for plate spring and method for detecting plate spring by using same |
| CN102419225B (en) * | 2011-08-23 | 2013-12-11 | 平高集团有限公司 | Elasticity detection device for plate spring and method for detecting plate spring by using same |
| CN106289745A (en) * | 2016-08-11 | 2017-01-04 | 上海汽车集团股份有限公司 | Composite material plate spring high/low temperature fatigue and rolling capability testboard bay |
| CN106289745B (en) * | 2016-08-11 | 2018-12-07 | 上海汽车集团股份有限公司 | Composite material plate spring high/low temperature fatigue and rolling capability testboard bay |
| CN107063535A (en) * | 2016-12-12 | 2017-08-18 | 贵州航天林泉电机有限公司 | A kind of leaf spring pressure-detecting device and its detection method |
| CN107063535B (en) * | 2016-12-12 | 2023-01-20 | 贵州航天林泉电机有限公司 | Leaf spring pressure detection device and detection method thereof |
| CN107621246A (en) * | 2017-09-19 | 2018-01-23 | 芜湖炬胜机电设备厂 | Spring detection utensil easy to operate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: PINGGAO ELECTRIC CO., LTD., HENAN Free format text: FORMER OWNER: PINGGAO GROUP CO., LTD. Effective date: 20131205 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20131205 Address after: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee after: Pinggao Electric Co., Ltd., Henan Address before: South East of Pingdingshan city in Henan province 467001 No. 22 Patentee before: Pinggao Group Co., Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120606 |