CN211939797U - Precise screw locking device - Google Patents
Precise screw locking device Download PDFInfo
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- CN211939797U CN211939797U CN202020352205.7U CN202020352205U CN211939797U CN 211939797 U CN211939797 U CN 211939797U CN 202020352205 U CN202020352205 U CN 202020352205U CN 211939797 U CN211939797 U CN 211939797U
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- screw locking
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Abstract
The utility model discloses a device is paid to accurate screw lock, include: the three-axis motion platform is provided with a base, an X-axis motion mechanism, a Y-axis motion mechanism and a Z-axis motion mechanism; a screw supply part arranged on the base; the screw locking part is arranged on the Z-axis motion mechanism and comprises a driving part, an electric screwdriver mechanism, a suction nozzle, a negative pressure cavity and a magnetic ring; the electric screwdriver mechanism comprises an electric screwdriver and an electric screwdriver bit positioned below the electric screwdriver; the suction nozzle is inserted into the negative pressure cavity; the driving part drives the electric screwdriver mechanism to slide along the Z axial direction, and the electric screwdriver bit is inserted into or withdrawn from the negative pressure cavity; the magnetic ring is sleeved on the electric screwdriver head; the top end of the guide fixing shaft is provided with a groove, and on the guide part, the screw teeth on the screwdriver bit are meshed with the screw teeth on the screw cap of the sucked screw; and the product bearing seat is arranged on the Y-axis movement mechanism and is used for bearing a product to be screwed. The utility model is used for the problem that the defective rate is high is paid to the lock that produces when solving among the prior art lock and paying accurate screw.
Description
Technical Field
The utility model relates to a mechanical automation technical field, specifically speaking relates to a device is paid to accurate screw lock.
Background
The existing intelligent electronic products, such as bracelets, often use mechanical screw threads (belonging to precision screw threads) with sizes of M0.8-M1.2 during the assembly process, and such screw threads are difficult to identify during the locking process. If adopt current electric screwdriver mechanism to lock and pay, electric screwdriver mechanism absorbs the screw after its suction nozzle, moves and beats the screw on the product, but because this type of screw is too little, consequently, the condition that the electric screwdriver bit has the askew screw of top often can appear, leads to locking the defective rate high.
Disclosure of Invention
An object of the utility model is to provide a device is paid to accurate screw lock for the lock that produces when paying accurate screw among the solution prior art is paid and is paid the problem that the defective rate is high.
In order to realize the purpose of the utility model, the utility model adopts the following technical scheme to realize:
a precision screw locking device is characterized by comprising: the three-axis motion platform is provided with a base, an X-axis motion mechanism, a Y-axis motion mechanism and a Z-axis motion mechanism arranged on the X-axis motion mechanism, and the X-axis motion mechanism and the Y-axis motion mechanism are both arranged on the base; a screw supply part provided on the base for supplying screws; the screw locking part is arranged on the Z-axis motion mechanism and comprises a driving mechanism, an electric screwdriver mechanism, a suction nozzle for sucking a screw, a negative pressure cavity for providing negative pressure for the suction nozzle and a magnetic ring; the electric screwdriver mechanism comprises an electric screwdriver and an electric screwdriver cutter head positioned below the electric screwdriver; the suction nozzle is inserted into the negative pressure cavity; the driving mechanism drives the electric screwdriver mechanism to slide along the Z-axis direction, and the electric screwdriver bit is inserted into or withdrawn from the negative pressure cavity; the magnetic ring is sleeved on the electric screwdriver head; a guide fixing shaft having a groove at a top end thereof for receiving the screw sucked, and on which the screw driver bit is engaged with the screw nut; and the product bearing seat is arranged on the Y-axis movement mechanism and is used for bearing a product to be screwed.
As described above, the precision screw locking device, the screw locking portion further includes: a fixed plate installed on the Z-axis moving mechanism, and the driving mechanism is fixed to the fixed plate; a Z-direction guide rail arranged on the fixed plate; and the Z-direction sliding block is fixedly connected with the electric screwdriver mechanism, and the driving mechanism drives the Z-direction sliding block to slide along the Z-direction guide rail.
In the above-described precision screw locking device, the driving mechanism has a sliding portion that slides in the Z-axis direction, and the sliding portion is connected to the Z-axis slider.
As described above, the precision screw locking device, the screw locking portion further includes: a spring pressing plate provided on the sliding portion; the spring fixing plate is arranged on the Z-direction sliding block; and the buffer spring is clamped between the spring pressure plate and the spring fixing plate.
As described above, the precision screw locking device, the screw locking portion further includes: and the spring guide shaft is fixed on the spring fixing plate, and the buffer spring is sleeved on the spring guide shaft.
As described above, the precision screw locking device, the screw locking portion further includes: the suction nozzle fixing piece is arranged on the fixing plate and used for fixing the suction nozzle; the sealing cover plate is positioned on the suction nozzle fixing piece and used for guiding the electric screwdriver bit when the electric screwdriver bit is inserted into the negative pressure cavity; the suction nozzle fixing piece and the sealing cover plate form the negative pressure cavity.
The precise screw locking device comprises a screw supply part, a screw locking part and a screw locking part, wherein the screw supply part comprises a fixed bottom plate which is detachably fixed on the base; a screw aligner removably secured to the mounting base.
According to the precise screw locking device, the guide fixing shaft is fixed on the fixing bottom plate.
According to the precise screw locking device, the product bearing seat is detachably arranged on the Y-axis movement mechanism and is provided with a product clamping cover plate for fixing and protecting a product.
According to the precise screw locking device, the shape of the groove at the top end of the guide fixing shaft is matched with the bottom end of the stud of the screw to be sucked.
Compared with the prior art, the utility model discloses an advantage is with positive effect: the screw supply part is used for supplying screws to wait for suction of a suction nozzle, the suction nozzle of the screwdriver mechanism moves to the position right above the screws on the screw supply part through the X-axis movement mechanism and the Z-axis movement mechanism, the screws are moved to the position right above the guide fixing shaft and fall into the top end groove of the guide fixing shaft after being sucked, the screwdriver mechanism is driven to slide along the Z-axis direction through the driving mechanism on the guide fixing shaft, so that the screw teeth at the free end of the screwdriver bit are meshed with the screw teeth on the screw cap, and then the screws are moved to the position of a product to be screwed.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when read in conjunction with the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a structural diagram of an embodiment of a precision screw locking device according to the present invention;
fig. 2 is a structural diagram of a screw locking portion in an embodiment of a precision screw locking device according to the present invention.
FIG. 3 is a schematic diagram of a screw supplying portion of an embodiment of a precision screw locking device according to the present invention;
fig. 4 is a structural diagram of the product bearing seat and the bearing plate in the Y-axis moving mechanism in the embodiment of the precision screw locking device of the present invention.
Reference numerals: 100-precision screw locking device; 10-a base; 20-X axis motion mechanism; a 30-Y axis motion mechanism; 31-a carrier mounting plate; a 40-Z axis motion mechanism; 50-screw locking part; 51-locking a secondary electric cylinder; 511-a sliding part; 512-spring pressure plate; 52-electric batching mechanism; 521-electric batch; 522-electric screwdriver bit; 53-suction nozzle; 54-a magnetic ring; 55-fixing plate; 56/56' -Z-guide; 57/57' -Z-direction slider; 58-spring fixed seat plate; 59-a buffer spring; 59' -spring guide shaft; a-a gas pipe joint; b-a nut; c-suction nozzle fixing piece; d-sealing the cover plate; 60-screw supply; 70-a guide fixing shaft; 71-a groove; 61-a fixed base plate; 62-a thread aligner; 80-a product carrying seat; 81-product clamping cover plate; 90-positioning pin.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and embodiments.
In order to improve the locking yield rate when automatically locking the precision screws, the present embodiment relates to a precision screw locking device 100, which includes a three-axis motion platform, a screw locking portion 50, a screw supplying portion 60, a guiding fixing shaft 70 and a product bearing seat 80.
Referring to fig. 1 to 4, the respective parts of the precision screw locking apparatus 100 will be described.
The three-axis motion platform comprises a base 10, an X-axis motion mechanism 20, a Y-axis motion mechanism 30 and a Z-axis motion mechanism 40, wherein the X-axis motion mechanism 20 and the Y-axis motion mechanism 30 are arranged on the base 10, the Z-axis motion mechanism 40 is installed on the X-axis motion mechanism 20, a screw locking part 50 is installed on the Z-axis motion mechanism 40, and a product bearing seat 80 is installed on the Y-axis motion mechanism 30. The X-axis movement mechanism 20 realizes the X-axis movement of the screw locking part 50, the Y-axis movement mechanism 30 realizes the Y-axis movement of the product bearing seat 50, the Z-axis movement mechanism 40 realizes the Z-axis movement of the screw locking part 50, and the accurate positioning between the screw driven by the screw locking part 50 and the product to be screwed is realized through the three-axis movement platform.
In this embodiment, the driving mechanisms of the X-axis movement mechanism 20, the Y-axis movement mechanism 30, and the Z-axis movement mechanism 40 may all adopt precision stepping motors, and the precision stepping motors realize transmission through toothed belt linkage.
In the scheme, the X-axis movement mechanism 20, the Y-axis movement mechanism 30 and the Z-axis movement mechanism 40 can adopt guide rail sliding block mechanisms, and the sliding blocks are driven by the precise stepping motor to move along the guide rail in the X-axis direction, the Y-axis direction and the Z-axis direction.
As shown in fig. 2, in the present embodiment, the screw locking portion 50 can respectively realize the X-axis movement and the Z-axis movement on the X-axis movement mechanism 20 and the Z-axis movement mechanism 40.
In order to realize the movement of the screwdriver 52 along the Z-axis for engaging the screwdriver bit 522 with the screw sucked by the suction nozzle 53, the driving mechanism is a locking cylinder 51 in the embodiment, which can drive the screwdriver 52 to move along the Z-axis, wherein the screwdriver 52 comprises a screwdriver 521 and a screwdriver bit 522, the screwdriver 521 is a power element for locking the screw, the screwdriver bit 522 is located at the lower end of the screwdriver 521 and is provided with a tooth engaged with the tooth on the screw cap to be screwed at the free end, and the screwdriver bit 522 is used for transmitting the torque for locking the screw when being engaged with the screw. The fixing plate 55 of the screw locking portion 50 is fixed to the Z-axis moving mechanism 40, the fixing plate 55 of this embodiment is in a shape of a "convex" as a whole, and the two Z-direction guide rails 56 and 56', the locking cylinder 51, and the nozzle fixing member C, which are arranged in parallel, are all fixed to the fixing plate 55.
With reference to fig. 2, the suction nozzle fixing member C is used for fixing the suction nozzle 53 and has a cavity inside, the suction nozzle 53 is located below the suction nozzle fixing member C and is partially inserted into the suction nozzle fixing member 53, the suction nozzle fixing member C is provided with a vacuum suction nozzle air inlet (not labeled), an air pipe joint a is installed at the vacuum suction nozzle air inlet, the cavity of the suction nozzle fixing member C can form a negative pressure cavity in which the suction nozzle 53 absorbs negative pressure required by the screw, the suction nozzle fixing member C is located below the screwdriver mechanism 52, and when the screwdriver mechanism 52 moves along the Z-axis direction under the driving action of the driving mechanism, the screwdriver bit 522 at the lower end of the screwdriver mechanism 52 can be inserted into the negative pressure cavity and engaged with the screw cap of the screw in the suction nozzle 53 or withdrawn from the.
Because the screwdriver bit 522 needs to extend into the negative pressure cavity, a first through hole needs to be formed in the negative pressure cavity, and in order to avoid air leakage from the first through hole, a sealing cover plate D is arranged above the suction nozzle fixing part 53, and a second through hole is formed in the sealing cover plate D, so that the screwdriver bit 522 can conveniently pass through the second through hole and the first through hole in sequence to enter the negative pressure cavity. The sealing cover plate D has a certain thickness, so that on one hand, the sealing cover plate D is used for guiding the screwdriver bit 522 when being inserted into the negative pressure cavity, and can also seal the negative pressure cavity to avoid air leakage.
In order to realize that the locking electric cylinder 51 can drive the electric screwdriver mechanism 52 to move along the Z-axis direction, Z-direction sliding blocks 57 and 57 'are respectively arranged on two sides of the electric screwdriver 521, and are driven by the driving mechanism to respectively slide along Z-direction guide rails 56 and 56' along the Z-axis direction.
The driving mechanism of the present embodiment is a lock charging cylinder 51, which has a sliding portion 511, and when the lock charging cylinder 51 is operated, the sliding portion 511 can slide, and in the present embodiment, the sliding portion 511 slides along the Z-axis direction. In order to transmit the power of the locking cylinder 51 to the electric batch mechanism 52, the sliding portion 511 needs to be connected to the Z-direction slider 57 and/or 57'.
In this embodiment, in order to prevent the screwdriver bit 522 from colliding with the screw due to an excessive collision force when the screwdriver bit 522 is driven to move down by the locking electric cylinder 51, the sliding portion 511 is fixedly provided with the spring pressing plate 512, the Z-direction slider 37 'is fixedly provided with the spring fixing plate 58, the bottom end of the spring guide shaft 59' is fixed to the spring fixing plate 58, the spring guide shaft 59 'is sleeved with the buffer spring 59, the top end of the spring guide shaft 59' is provided with the external thread, and the top end of the spring guide shaft passes through the through hole (not shown) formed in the spring pressing plate 512 and is fixed by the nut B, so that the buffer spring 59 is stably located between the spring pressing plate 512 and the spring fixing plate 58, and can buffer the Z-axis movement of the electric screwdriver mechanism 52.
As shown in fig. 2, a magnetic ring 54 is sleeved on the outer peripheral side surface of the electric screwdriver bit 521 for magnetizing the electric screwdriver bit 522. When the screw thread at the free end of the screwdriver bit 522 is engaged with the screw thread of the screw cap, even if the negative pressure chamber is insufficient to keep the suction nozzle 53 sucking the screw, the screw thread at the free end of the screwdriver bit 522 is always engaged with the screw thread of the screw cap due to the magnetization of the screwdriver bit 522.
As shown in fig. 3, the screw supply part 60 and the guide fixing shaft 70 are shown.
The screw supply portion 60 includes a fixing base plate 61 and a screw aligner 62, and the screw aligner 62 may be detachably mounted (e.g., with screws) to the fixing base plate 61, as shown in fig. 1, and the fixing base plate 61 may be detachably mounted to the base 10, for example, with screws.
The screw aligner 62 of the present embodiment is used for aligning and separating screws for the suction of the suction nozzle 53, and the structure thereof can refer to the structure of the screw aligner in the prior art, which will not be described in detail herein.
If the screw sucked by the suction nozzle 53 is directly driven into the position of the product to be screwed, the screwdriver bit 522 is slightly pushed to incline, and the locking of the product is poor because the locked precise screw is too small and slightly pushed to incline. Therefore, in order to reduce the defective rate of locking, when the screw is locked, firstly, the screw teeth at the free end of the screwdriver bit 522 are matched with the screw teeth of the screw cap of the screw on the guide fixing shaft 70, and then the screw is moved to the position of the product to be screwed for locking.
As shown in fig. 3, the guiding and fixing shaft 70 is fixedly disposed on the fixing base plate 61 at a position close to a screw dividing plate (not labeled) of the screw aligner 62, and a groove 71 is formed at the top end of the guiding and fixing shaft 70, and the shape of the groove 71 is adapted to the bottom end of a stud of a screw to be sucked, so as to prevent the screw from being skewed when the screw is placed in the top groove 71 by the suction nozzle 53.
As shown in fig. 4, in the present embodiment, the product carrier 80 can be placed on the carrier plate 31 of the Y-axis moving mechanism 30. In order to disassemble the product bearing seat 80, two positioning pins, only one of which 90 is shown, are provided on the bearing plate 31 for positioning the product bearing seat 80.
With continued reference to fig. 4, a product clamping cover plate 81 is further disposed on the product bearing seat 80 for fixing the product to be screwed and protecting the portion of the product to be protected when the product is placed on the product bearing seat 80. Generally treat that the product of beating the screw is small, if bear the seat 80 with the product and install to the loading board 31 on, then place the product, it is probably not very convenient to use, and because the product bears the seat 80 and can take off/install from the loading board 31, consequently, when using, can bear the seat 80 with the product and take off from the loading board 31, utilize the product to press from both sides tight apron 81 and fix the product earlier with the product, then will wholly utilize the locating pin location product to bear the seat 80, make things convenient for the product to place like this.
The operation principle of the locking by the above-mentioned precision screw locking device 100 is explained as follows.
(1) The screw supply unit 60 separates the screw array and waits for the suction 53 to suck.
(2) The X-axis motion mechanism 20 and the Z-axis motion mechanism 30 in the three-axis motion platform drive the screw locking part 50 to move, so that the suction nozzle 53 corresponds to the position of the screw to be taken on the screw supply part 60.
(3) The suction nozzle 53 sucks the screw and moves to a position right above the guide fixing shaft 70 by using the X-axis movement mechanism 20 and the Z-axis movement mechanism 30 of the three-axis movement platform.
(4) The locking cylinder 51 acts to drive the sliding block 511 to slide downwards along the Z axis, so as to drive the screwdriver 521 and the screwdriver bit 522 to move downwards along the Z axis until the screwdriver bit 522 pushes the screw into the top groove of the guide fixing shaft 70, and simultaneously, the screwdriver 521 rotates at a low speed, so that the engagement of the screw teeth at the free end of the screwdriver bit 522 and the screw teeth on the screw cap of the screw is realized.
(5) Then, the Z-axis movement mechanism 40 drives the screw locking portion 50 to move upward along the Z-axis, and at this time, since the screw is pushed up in the (4) th step, the air pressure in the negative pressure chamber is destroyed, but due to the presence of the magnetic ring 54 on the screwdriver bit 522, the screwdriver bit 522 is magnetized, so that when the screw locking portion 50 moves upward along the Z-axis from the guide fixing shaft 70, the magnetic force ensures that the screw teeth at the free end of the screwdriver bit 522 are engaged with the screw teeth on the screw cap of the screw, thereby preventing the screwdriver bit 522 from being pushed up and tilted to cause poor locking, improving the accuracy of screw locking, and improving the yield of products.
(6) After that, the three-axis motion platform drives the screw locking part 50 and the product bearing part 80 to move and accurately position, so that the screw is located right above the position to be screwed, and then the screw locking process is performed, which can be summarized as follows.
To facilitate tooth recognition, the screwdriver 521 is first caused to freely rotate in the reverse direction; the locking electric cylinder 51 works, the sliding block 511 continues to move downwards along the Z-axis, the screw is moved downwards to be in contact with the screw column to be locked, and after the electric screwdriver 521 feeds back a moment, the electric screwdriver continues to turn over for example 360 degrees; after the electric batch 521 stops rotating the lieu for 0.02 second, the locking mode of forward rotation is switched; the sliding block 511 continues to move downwards to start locking and paying, torsion judgment is carried out in the locking and paying process, if the electric screwdriver 521 judges that the torsion exceeds the limit, the electric screwdriver 521 rotates reversely and is unscrewed, the sliding block 511 moves upwards along the Z axis, then the electric screwdriver 521 switches to a locking and paying mode rotating in the forward direction, the sliding block 511 continues to move downwards, if the electric screwdriver 521 judges that the torsion does not exceed the limit, the electric screwdriver 521 judges whether a preset locking and paying number of turns is reached, if yes, the locking and paying are finished, if not, the electric screwdriver 521 rotates reversely and is unscrewed, the sliding block 511 moves upwards along the Z axis, and alarm information is output to prompt an operator.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or that equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention, which is claimed.
Claims (10)
1. A precision screw locking device is characterized by comprising:
the three-axis motion platform is provided with a base, an X-axis motion mechanism, a Y-axis motion mechanism and a Z-axis motion mechanism arranged on the X-axis motion mechanism, and the X-axis motion mechanism and the Y-axis motion mechanism are both arranged on the base;
a screw supply part provided on the base for supplying screws;
the screw locking part is arranged on the Z-axis motion mechanism and comprises a driving mechanism, an electric screwdriver mechanism, a suction nozzle for sucking a screw, a negative pressure cavity for providing negative pressure for the suction nozzle and a magnetic ring; the electric screwdriver mechanism comprises an electric screwdriver and an electric screwdriver cutter head positioned below the electric screwdriver; the suction nozzle is inserted into the negative pressure cavity; the driving mechanism drives the electric screwdriver mechanism to slide along the Z-axis direction, and the electric screwdriver bit is inserted into or withdrawn from the negative pressure cavity; the magnetic ring is sleeved on the electric screwdriver head;
a guide fixing shaft having a groove at a top end thereof for receiving the screw sucked, and on which the screw driver bit is engaged with the screw cap of the screw;
and the product bearing seat is arranged on the Y-axis movement mechanism and is used for bearing a product to be screwed.
2. The precision screw locking device of claim 1, wherein the screw locking portion further comprises:
a fixed plate installed on the Z-axis moving mechanism, and the driving mechanism is fixed to the fixed plate;
a Z-direction guide rail arranged on the fixed plate;
and the Z-direction sliding block is fixedly connected with the electric screwdriver mechanism, and the driving mechanism drives the Z-direction sliding block to slide along the Z-direction guide rail.
3. The precision screw locking device according to claim 2, wherein the driving mechanism has a sliding portion that slides in the Z-axis direction, and the sliding portion is connected to the Z-slide.
4. The precision screw locking device of claim 3, wherein the screw locking portion further comprises:
a spring pressing plate provided on the sliding portion;
a spring fixing plate disposed on the Z-direction slider;
and the buffer spring is clamped between the spring pressing plate and the spring fixing plate.
5. The precision screw locking device of claim 4, wherein the screw locking portion further comprises:
and the spring guide shaft is fixed on the spring fixing plate, and the buffer spring is sleeved on the spring guide shaft.
6. The precision screw locking device according to any one of claims 3 to 5, wherein the screw locking portion further comprises:
the suction nozzle fixing piece is arranged on the fixing plate and used for fixing the suction nozzle;
the sealing cover plate is positioned on the suction nozzle fixing piece and used for guiding the electric screwdriver bit when the electric screwdriver bit is inserted into the negative pressure cavity;
the suction nozzle fixing piece and the sealing cover plate form the negative pressure cavity.
7. The precision screw locking device of claim 1, wherein the screw supply comprises:
a fixed base plate detachably fixed to the base;
a screw aligner removably secured to the mounting base.
8. The precision screw locking device of claim 7, wherein the guide fixing shaft is fixed to the fixing base plate.
9. The precision screw locking device of claim 1, wherein the product carrier is detachably disposed on the Y-axis motion mechanism; and the product bearing seat is provided with a product clamping cover plate for fixing and protecting the product.
10. The precision screw locking device according to claim 1, wherein the shape of the groove at the top end of the guide fixing shaft is matched with the bottom end of the stud of the screw to be sucked.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020352205.7U CN211939797U (en) | 2020-03-19 | 2020-03-19 | Precise screw locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020352205.7U CN211939797U (en) | 2020-03-19 | 2020-03-19 | Precise screw locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211939797U true CN211939797U (en) | 2020-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020352205.7U Active CN211939797U (en) | 2020-03-19 | 2020-03-19 | Precise screw locking device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605645A (en) * | 2020-12-24 | 2021-04-06 | 歌尔光学科技有限公司 | Screw locking equipment |
| CN114473410A (en) * | 2022-01-17 | 2022-05-13 | 王秀梅 | Square shell four-corner bolt locking assembly device and use method thereof |
-
2020
- 2020-03-19 CN CN202020352205.7U patent/CN211939797U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112605645A (en) * | 2020-12-24 | 2021-04-06 | 歌尔光学科技有限公司 | Screw locking equipment |
| CN112605645B (en) * | 2020-12-24 | 2022-06-21 | 歌尔光学科技有限公司 | Screw locking equipment |
| CN114473410A (en) * | 2022-01-17 | 2022-05-13 | 王秀梅 | Square shell four-corner bolt locking assembly device and use method thereof |
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