CN212768471U - Clamping plate conveying device - Google Patents

Clamping plate conveying device Download PDF

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Publication number
CN212768471U
CN212768471U CN202021368189.7U CN202021368189U CN212768471U CN 212768471 U CN212768471 U CN 212768471U CN 202021368189 U CN202021368189 U CN 202021368189U CN 212768471 U CN212768471 U CN 212768471U
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China
Prior art keywords
driving
cam
limiting
plate
limiting plate
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CN202021368189.7U
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Inventor
姚征远
林福凌
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Xiamen Sinic Tek Intelligent Technology Co ltd
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Xiamen Sinic Tek Intelligent Technology Co ltd
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Abstract

The utility model provides a splint conveyor, including two at least centre gripping units, every the centre gripping unit includes a drive mechanism and two sets of parallel arrangement's fixture, a plurality of in the centre gripping unit fixture sets up side by side in proper order, fixture includes limiting plate, centre gripping subassembly and cam drive subassembly, every drive mechanism is arranged in driving simultaneously two in the same group cam drive subassembly, the cam drive subassembly passes through the cam drive principle and drives the centre gripping subassembly is relative the elevating movement is realized to the limiting plate, and cooperates go up the clamping of limiting plate realization to the multiunit determinand or and loosen. The utility model relates to a splint conveyor can effectively realize that multiunit centre gripping is carried simultaneously, and guarantees the beneficial effect of centre gripping synchronism.

Description

Clamping plate conveying device
Technical Field
The utility model relates to a detect fixed equipment technical field, particularly, relate to a splint conveyor.
Background
SPI (solder inspection) refers to a solder paste detection system, and is SMT detection equipment which calculates the height of solder paste printed on a circuit board (PCB) by a triangulation method by using an optical principle. When the circuit board is detected, the circuit board needs to be clamped and fixed by the clamping plate device.
The existing clamping plate device, as disclosed in chinese patent CN2019205035522U, comprises two sets of clamping mechanisms and driving mechanisms arranged in parallel, wherein each clamping mechanism comprises a vertically arranged limiting plate and a knife pressing fixing member arranged on one side of the limiting plate and capable of moving up and down relative to the limiting plate, the driving mechanism comprises a driving motor, a driving shaft penetrating through the limiting plates of the two sets of clamping mechanisms, and driving wheel sets respectively arranged on the two sets of clamping mechanisms, the driving shaft is connected with an output shaft of the driving motor, and each driving wheel set comprises a cam arranged on the driving shaft and an auxiliary wheel fixedly arranged on the knife pressing fixing member and abutted against a curved surface of the cam; the clamping mechanism can only clamp one row of objects to be detected, which results in very slow detection speed and efficiency.
In view of this, the utility model provides a but multiunit centre gripping is carried simultaneously, and guarantees the splint conveyor of centre gripping synchronism.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a but multiunit centre gripping is carried simultaneously, and guarantees a splint conveyor of centre gripping synchronism.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a splint conveyor, includes two at least centre gripping units, every the centre gripping unit includes a actuating mechanism and two sets of parallel arrangement's fixture, a plurality of in the centre gripping unit fixture sets up side by side in proper order, fixture includes limiting plate, centre gripping subassembly and cam drive subassembly, every first actuating mechanism is arranged in the simultaneous drive with two in organizing cam drive subassembly, cam drive subassembly passes through the drive of cam drive principle the centre gripping subassembly is relative elevating movement is realized to the limiting plate, and the cooperation go up the clamping of limiting part realization to the multiunit determinand or and loosen.
As a further improvement, the cam driving component comprises a cam, a driving wheel which is arranged in a manner of abutting against the curved surface of the cam, and a lifting block which is fixedly connected with the driving wheel, and the lifting block is fixedly connected with the clamping component.
As a further improvement, the clamping assembly comprises a guide plate and a pressing knife fixing piece, the guide plate is connected with the limiting plate in a guiding mode through a guide rail structure, and the pressing knife fixing piece is driven by the guide plate to lift to clamp and loosen an object to be tested.
As a further improvement, the cam driving assembly further comprises a limiting block, the limiting block is of a J shape, a limiting rod is arranged on the cam, and a hook part of the limiting block is matched with the limiting rod to limit the maximum rotation angle of the cam.
As a further improvement, the first driving mechanism comprises a first driving motor and a first driving rod in driving connection with the first driving motor, and the first driving rod penetrates through the cam and is fixedly connected with the cam.
As a further improvement, the number of the first driving mechanisms is two, the number of the clamping mechanisms is two, and the two groups of clamping mechanisms can respectively clamp and release two objects to be tested under the driving of the two first driving mechanisms.
As a further improvement, two of the clamping mechanisms are provided with synchronous belt conveying mechanisms on the side faces of the limiting plates, and the synchronous belt conveying mechanisms are used for conveying the object to be detected along the length direction of the limiting plates.
As a further improvement, a stop plate is further arranged on the limit plate and used for limiting the maximum stroke of the object to be tested conveyed by the synchronous belt conveying mechanism.
As a further improvement, the device further comprises at least one second driving mechanism, each second driving mechanism comprises a second driving motor and a second driving screw rod, and the second driving screw rod in the single second driving mechanism is in threaded connection with one limiting plate in each group of clamping mechanisms, so that the distance between the two limiting plates in each group of clamping mechanisms can be adjusted.
As a further improvement, the wire harness fixing device further comprises a group of guide slide rails, the guide slide rails are arranged below the limiting plate along the length direction of the second driving screw rod, and guide slide blocks fixedly connected with the limiting plate are arranged on the guide slide rails.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to a splint conveyor wholly adopts the structure setting of multiunit centre gripping unit can effectively realize the centre gripping respectively or loosen the multiunit determinand, and centre gripping or loosening when every group centre gripping unit homoenergetic single control a set of determinand, has not only kept the action synchronous stability when singly organizing the determinand centre gripping, can also effectively strengthen whole efficiency of software testing simultaneously.
2. The utility model relates to a single first actuating mechanism among electric splint combines cam drive assembly to realize the synchro control to a set of centre gripping subassembly to the realization presss from both sides tightly or unclamps when to the determinand, can effectively guarantee the action between a plurality of centre gripping subassemblies synchronous, makes the determinand atress even, guarantees that the detection position in the testing process is accurate not to have skew, and overall structure is ingenious, and the function is easy to go.
3. The utility model relates to a cam drive assembly among splint conveyor adopts the structure of stopper cooperation cam, not only can effectively realize the synchronous linkage motion between first driving motor and the cam, can also realize the restriction of maximum rotation angle through the cooperation of stopper and gag lever post simultaneously, cooperates first driving motor to reverse in suitable position, avoids cam drive assembly to collide because of first driving motor's trouble and damages.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a splint conveying device according to the present invention;
fig. 2 is a schematic structural view of a splint conveying device according to the present invention;
FIG. 3 is an enlarged schematic view of FIG. 2 at the first drive mechanism;
FIG. 4 is an enlarged schematic view of the cam drive assembly of FIG. 2;
fig. 5 is a schematic structural view of a clamping mechanism in a splint conveying device according to the present invention;
fig. 6 is a schematic structural view of a clamping mechanism in a splint conveying device according to the present invention.
Description of the main elements
100. A clamping unit;
10. a first drive mechanism; 11. a first rotating disk; 12. a second rotating disk; 13. a first connection block; 14. a first drive motor; 15. a first drive lever;
20. a clamping mechanism; 21. a limiting plate; 22. a clamping assembly; 221. a guide plate; 222. a knife pressing fixing part; 23. a cam drive assembly; 231. a fixed block; 232. a cam; 233. a limiting block; 234. a driving wheel; 235. a lifting block; 236. a limiting rod;
30. a synchronous belt conveying mechanism; 31. an active driving wheel; 32. a tension wheel; 33. a third drive motor; 34. a belt;
40. an upper limiting member;
50. stopping the plate;
60. a second drive mechanism; 61. a second drive motor; 62. a second drive screw;
70. fixing a main board;
80. a guide slide rail;
90. a sensor holder.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Referring to fig. 1 and fig. 2, in an embodiment, a clamping plate conveying device includes at least two clamping units 100, each clamping unit 100 includes a first driving mechanism 10 and two groups of clamping mechanisms 20 arranged in parallel, the clamping mechanisms 20 in the plurality of clamping units 100 are sequentially arranged side by side, each clamping mechanism 20 includes a limiting plate 21, a clamping assembly 22 and a cam driving assembly 23, each first driving mechanism 10 is configured to simultaneously drive two cam driving assemblies 23 in the same group, the cam driving assemblies 23 drive the clamping assemblies 22 to realize lifting movement relative to the limiting plate 21 through a cam transmission principle, and cooperate with the upper limiting member 40 to clamp or loosen multiple groups of objects to be tested.
The whole structure of adopting multiunit clamping unit 100 sets up can effectively realize the centre gripping respectively or unclamping to the multiunit determinand, and centre gripping or unclamping when every group clamping unit 100 homoenergetic controls a set of determinand alone, has not only kept the action synchronization stability when singly organizing the determinand centre gripping, can also effectively strengthen whole efficiency of software testing simultaneously.
Referring to fig. 1 and fig. 2, the number of the first driving mechanisms 10 is two, the number of the clamping mechanisms 20 is two, and the two groups of clamping mechanisms 20 can simultaneously and respectively clamp and release two objects to be measured under the driving of the two first driving mechanisms 10. By adopting the structure, the independent clamping control of the two objects to be tested can be effectively realized, and the function is easy to operate.
Specifically, two clamping units 100 are sequentially arranged along the length direction of the first driving rod 15, each clamping unit 100 comprises four clamping mechanisms 20, the first clamping mechanism 20 and the second clamping mechanism 20 form a group, two cam driving assemblies 23 in the group are driven by the first driving motor 14 in the clamping unit 100 to realize simultaneous control of lifting and lowering of the lifting plate, and in order to facilitate the stability and convenient fixation of the whole structure, the first driving rod 15 also penetrates through the limiting plates 21 of the third clamping mechanism 20 and the fourth clamping mechanism 20; similarly, the third clamping mechanism 20 and the fourth clamping mechanism 20 are in one group.
Referring to fig. 2 to 3, the first driving mechanism 10 includes a first rotating disk 11, a second rotating disk 12, a first connecting block 13, a first driving motor 14 and a first driving rod 15 in driving connection with the first driving motor 14, the first rotating disk 11 is in driving connection with a driving shaft of the first driving motor 14, the second rotating disk 12 is disposed below the first rotating disk 11 and is connected with the first rotating disk 11 through the first connecting block 13, the first driving motor 14 drives the first rotating disk 11 to rotate and realizes reciprocating rotation of the second rotating disk 12 through linkage of the first connecting block 13, the second rotating disk 12 is fixedly connected with the first driving rod 15, and the first driving rod 15 is used for driving the cam driving assembly 23 to operate.
Referring to fig. 2, fig. 3, fig. 4 and fig. 6, in an embodiment, the cam driving assembly 23 includes a fixing block 231, a cam 232, a driving wheel 234 disposed at a position where the limiting block 233 abuts against a curved surface of the cam 232, and a lifting block 235 fixedly connected to the driving wheel 234, wherein the lifting block 235 is fixedly connected to the clamping assembly 22. The fixing block 231 is fixed on one side of the limiting plate 21, the first driving rod 15 penetrates through the cam 232 and the fixing block 231, a bearing is arranged between the fixing block 231 and the first driving rod 15, and the cam 232 is fixedly connected with the first driving rod 15 and drives the cam 232 to rotate through the rotation of the first driving rod 15; when the cam 232 rotates, the driving wheel 234 is pressed to move in the vertical direction, and the up-and-down movement of the driving wheel 234 drives the lifting block 235 to lift, so that the lifting of the clamping assembly 22 is finally realized through the lifting of the lifting block 235.
The single first driving mechanism 10 is combined with the cam driving component 23 to realize synchronous control on a group of clamping components 22, so that the object to be detected is clamped or loosened simultaneously, the synchronous action among the plurality of clamping components 22 can be effectively ensured, the stress of the object to be detected is uniform, and the detection position in the detection process is accurate and does not deviate; meanwhile, the cam driving component 23 is matched with the cam 232 through the fixing block 231, so that the whole structure is compact, stable and firm, and the matching is ingenious.
Further, the limiting block 233 is J-shaped, a limiting rod is arranged on the cam 232 along the axis direction, and the hook portion of the limiting block 233 is matched with the limiting rod 236 to limit the maximum rotation angle of the cam 232.
Cam drive assembly 23 adopts the structure of stopper 233 cooperation cam 232, not only can effectively realize the synchronous coordinated motion between first driving motor 14 and the cam 232, can also realize the restriction of maximum rotation angle through the cooperation of stopper 233 and gag lever post simultaneously, cooperates first driving motor 14 to reverse in suitable position, avoids cam drive assembly 23 to take place the collision because of the trouble of first driving motor 14 and damages, in addition, not the same group be provided with the standing groove on the limiting plate 21, the standing groove is used for setting up stopper 233 in order to guarantee overall structure's compactedness.
Referring to fig. 4 and 5, in an embodiment, the clamping assembly 22 includes a guide plate 221 and a pressing tool fixing member 222, the guide plate 221 and the limiting plate 21 are connected in a guiding manner through a guide rail structure, the pressing tool fixing member 222 is driven by the guide plate 221 to clamp and loosen an object to be tested, a yielding groove is formed in the limiting plate 21, the lifting block 235 is integrally L-shaped, and a horizontal portion of the lifting block 235 penetrates through the yielding groove and is fixedly connected to the guide plate 221.
Further, be provided with at least one spout on the limiting plate 21, guide rail mechanism includes slide rail and slider, the slide rail set up in the spout, the slider with deflector 221 fixed connection.
Referring to fig. 5, in an embodiment, two timing belt transmission mechanisms 30 are disposed on the lateral sides of two position-limiting plates 21 in one group of the clamping mechanisms 20, the two timing belt transmission mechanisms 30 are used for conveying an object to be tested along the length direction of the position-limiting plates 21, each timing belt transmission mechanism 30 includes a driving transmission wheel 31, a plurality of tension wheels 32, a third driving motor 33 and a belt 34, and the third driving motor 33 is in driving connection with the driving transmission wheel 31 to drive the belt 34.
Further, referring to fig. 1 and fig. 5, a plurality of upper limiting members 40 are disposed on the limiting plate 21, the upper limiting members 40 are disposed at the positions to be tested, each limiting plate 21 is provided with an upper limiting member 40, and the limiting members 40 are used for cooperating with the lower clamping mechanism 20 to press the object to be tested conveyed by the synchronous belt conveying mechanism 30; the limiting plate 21 is further provided with a stopping plate 50, the stopping plate 50 is used for limiting the maximum stroke of the object to be tested conveyed by the synchronous belt conveying mechanism 30, the limiting plate 21 is L-shaped, the vertical part of the limiting plate extends to the position between the upper belt part and the lower belt part of the synchronous belt, and when the object to be tested is conveyed to the station to be tested by the synchronous belt conveying mechanism 30, the limiting plate 21 stops the object to be tested.
Referring to fig. 1, the splint conveying device further includes at least one second driving mechanism 60, each second driving mechanism 60 includes a second driving motor 61 and a second driving screw 62, and the second driving screw 62 of a single second driving mechanism 60 is in threaded connection with one of the limiting plates 21 of each group of clamping mechanisms 20, so as to adjust the distance between two limiting plates 21 of each group of clamping mechanisms 20. In this embodiment, the number of the clamping mechanisms 20 is two, that is, the number of the limiting plates 21 is two, and the number of the second driving mechanisms 60 is three, so that each second driving screw 62 is respectively connected with one limiting plate 21 in a screw transmission manner, and by such a structure, the positions of three limiting plates 21 can be arbitrarily adjusted, thereby changing the position between two limiting plates 21 in each group of clamping mechanisms 20.
Further, a fixed general plate 70 is arranged on one side of the clamping plate conveying device, and the first driving motor 14 and the second driving motor 61 are both fixed on the fixed general plate 70. Specifically, because the shared area of second actuating mechanism 60 is great, set up three second actuating motor 61 respectively in two first actuating motor 14 both sides, total six lead screws this moment, two lead screws in every group set up respectively in both sides and the lead screw other end accessible synchronizing wheel is connected with synchronous belt, then carry out manual control through the handle that sets up on the synchronizing wheel and adjust the determinand that the not unidimensional limiting plate 21 distance of adaptation between every group fixture 20 comes.
Specifically, splint conveyor further includes a set of direction slide rail 80, direction slide rail 80 follows second drive lead screw 62 length direction set up in limiting plate 21 below just is located splint conveyor both sides, be provided with on the direction slide rail 80 with limiting plate 21 fixed connection's direction slider is in order to play limiting plate 21's steady removal.
In addition, referring to fig. 5, a plurality of sensor brackets 90 are disposed on the limiting plate 21, a first detection sensor, a second detection sensor, and a third detection sensor are disposed on each of the plurality of sensor brackets 90, and the first detection sensor is disposed on the guide plate 221 for detecting whether the object to be detected exists at the station to be detected; the second detection sensor is arranged at the front end or the rear end of the limiting plate 21 in the length direction and used for detecting whether the object to be detected is fed successfully from any direction; the number of the third detection sensors is two, when the second detection sensor is arranged at the front end of the limiting plate 21, the third detection sensor is arranged at the rear end, the two third detection sensors are arranged close to each other and are respectively used for being arranged at the position where the object to be detected needs to be decelerated and the position where the object to be detected needs to be stopped, the second detection sensor and the third detection sensor are matched with the stopping plate 50 to realize double guarantee for the object to be detected, and the object to be detected is guaranteed to be accurately stopped at the required station to be detected; in this embodiment, its determinand is the PCB board, first detection sensor is infrared ray sensor, second detection sensor and third detection sensor are photoelectric sensor.
Referring to fig. 1, in an embodiment, a plurality of fixing devices are disposed on the limiting plate 21 and the fixing plate 70, and the fixing devices are used to detachably fix the clamping plate conveying device on the testing apparatus through fixing members, such as bolts.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A splint conveyor, characterized in that: including two at least clamping unit (100), every clamping unit (100) include a actuating mechanism (10) and two sets of parallel arrangement's fixture (20), a plurality of in clamping unit (100) fixture (20) set up side by side in proper order, fixture (20) include limiting plate (21), centre gripping subassembly (22) and cam drive subassembly (23), every actuating mechanism (10) are arranged in driving simultaneously with two in the group cam drive subassembly (23), cam drive subassembly (23) drive through the cam drive principle centre gripping subassembly (22) are relative limiting plate (21) realize elevating movement to spacing piece (40) realize pressing from both sides tightly or loosen the multiunit determinand on the cooperation.
2. The clamp plate delivery device according to claim 1, wherein: the cam driving assembly (23) comprises a cam (232), a driving wheel (234) which is arranged to abut against the curved surface of the cam (232), and a lifting block (235) which is fixedly connected with the driving wheel (234), wherein the lifting block (235) is fixedly connected with the clamping assembly (22).
3. The splint transport apparatus according to any one of claims 1 or 2, wherein: the clamping assembly (22) comprises a guide plate (221) and a pressing knife fixing piece (222), the guide plate (221) is connected with the limiting plate (21) in a guiding mode through a guide rail structure, and the pressing knife fixing piece (222) is driven by the guide plate (221) to lift to clamp and loosen an object to be measured.
4. The clamp plate conveying device according to claim 2, wherein the cam driving assembly (23) further comprises a limiting block (233), the limiting block (233) is J-shaped, a limiting rod is arranged on the cam (232), and a hook part of the limiting block (233) is matched with the limiting rod to limit the maximum rotation angle of the cam (232).
5. The clamp plate delivery device according to claim 2, wherein: the first driving mechanism (10) comprises a first driving motor (14) and a first driving rod (15) in driving connection with the first driving motor (14), and the first driving rod (15) penetrates through the cam (232) and is fixedly connected with the cam (232).
6. The clamp plate delivery device according to claim 1, wherein: the quantity of first actuating mechanism (10) is two, fixture (20) quantity is two sets of, and is two sets of fixture (20) can be respectively two the drive of first actuating mechanism (10) is down realized pressing from both sides tightly and unclamping two sets of determinand.
7. The splint transport apparatus according to any one of claims 1 or 6, wherein: a set of two in fixture (20) limiting plate (21) side all is provided with hold-in range transport mechanism (30), two hold-in range transport mechanism (30) are used for carrying the determinand along limiting plate (21) length direction.
8. The clamp plate delivery device according to claim 7, wherein: the limiting plate (21) is further provided with a stopping plate (50), and the stopping plate (50) is used for limiting the maximum stroke of the object to be detected conveyed by the synchronous belt conveying mechanism (30).
9. The clamp plate delivery device according to claim 1, wherein: the device further comprises at least one second driving mechanism (60), each second driving mechanism (60) comprises a second driving motor (61) and a second driving screw rod (62), and the second driving screw rod (62) in each second driving mechanism (60) is in threaded connection with one limiting plate (21) in each group of clamping mechanisms (20) so as to adjust the distance between the two limiting plates (21) in each group of clamping mechanisms (20).
10. The clamp plate delivery device according to claim 9, wherein: the wire rope winding device further comprises a group of guide sliding rails (80), the guide sliding rails (80) are arranged below the limiting plate (21) along the length direction of the second driving screw rod (62), and guide sliding blocks fixedly connected with the limiting plate (21) are arranged on the guide sliding rails (80).
CN202021368189.7U 2020-07-13 2020-07-13 Clamping plate conveying device Active CN212768471U (en)

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Application Number Priority Date Filing Date Title
CN202021368189.7U CN212768471U (en) 2020-07-13 2020-07-13 Clamping plate conveying device

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Application Number Priority Date Filing Date Title
CN202021368189.7U CN212768471U (en) 2020-07-13 2020-07-13 Clamping plate conveying device

Publications (1)

Publication Number Publication Date
CN212768471U true CN212768471U (en) 2021-03-23

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Application Number Title Priority Date Filing Date
CN202021368189.7U Active CN212768471U (en) 2020-07-13 2020-07-13 Clamping plate conveying device

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113146704A (en) * 2021-05-06 2021-07-23 重庆化工职业学院 Energy storage battery trimming device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113146704A (en) * 2021-05-06 2021-07-23 重庆化工职业学院 Energy storage battery trimming device
CN113146704B (en) * 2021-05-06 2022-10-18 重庆化工职业学院 Energy storage battery trimming device

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