positioning device

Abstract

This application relates to the field of positioning equipment technology, specifically to a positioning device. The positioning device includes: a base plate with an air extraction hole; and an adsorption mechanism including an air duct plate and multiple sealing components. The air duct plate is disposed on the base plate and serves to support the workpiece. The air duct plate has an air duct, an air extraction hole group, and a connecting hole group. The air duct communicates with the air extraction hole. The air extraction hole group includes a first air extraction hole and multiple second air extraction holes, both located on the side of the air duct plate away from the base plate. The connecting hole group includes a first connecting hole and multiple second connecting holes. The first connecting hole connects the air duct and the first air extraction hole, and the second connecting holes connect the air duct and the second air extraction holes. Multiple sealing components are correspondingly disposed within the multiple second connecting holes, sealing the second connecting holes. The above-mentioned positioning device can position the workpiece, effectively reducing workpiece deformation through a multi-stage adsorption method, resulting in good positioning performance.

Description

Technical Field

[0001] This application relates to the field of positioning equipment technology, and specifically to a positioning device. Background Technology

[0002] When manufacturing workpieces, it is necessary to position them. Currently, the common positioning method is to position the workpiece by clamping it on four sides. However, when using ordinary adsorption positioning devices to position workpieces, it is easy to cause inaccurate workpiece positioning, resulting in inaccurate detection positions and consequently inaccurate detection results. Utility Model Content

[0003] In view of the above, it is necessary to propose a positioning device that can position the workpiece, effectively reduce workpiece deformation by using a multi-stage adsorption method, and achieve good positioning effect.

[0004] This application provides a positioning device, including: a substrate with an air extraction hole; and an adsorption mechanism including an air duct plate and multiple sealing components. The air duct plate is disposed on the substrate and is used to support a workpiece. The air duct plate has an air duct, an air intake hole group, and a connecting hole group. The air duct is disposed on the side of the air duct plate near the substrate and communicates with the air extraction hole. The air intake hole group includes a first air intake hole and multiple second air intake holes. The first air intake hole and multiple second air intake holes are all opened on the side of the air duct plate away from the substrate. The connecting hole group includes a first connecting hole and multiple second connecting holes opened in the air duct plate. The first connecting hole is used to connect the air passage and the first suction hole. A plurality of second connecting holes correspond one-to-one with a plurality of second suction holes. The second connecting holes are used to connect the air passage and the corresponding second suction hole. A plurality of sealing components are disposed one-to-one in the plurality of second connecting holes. The sealing component includes a first elastic member and a sealing member. The first elastic member is disposed at one end of the second connecting hole near the substrate. The sealing member is disposed at one end of the first elastic member away from the substrate. The first elastic member is used to push the sealing member away from the substrate to seal the second connecting hole.

[0005] In the aforementioned positioning device, the suction hole on the substrate is connected to the air passage of the air passage plate of the adsorption mechanism. The air passage is connected to the first suction hole through a first connecting hole and to the second suction hole through a second connecting hole, forming an adsorption passage. After the suction hole is connected to an external suction device, suction can be performed to create negative pressure in the first and second suction holes, thereby adsorbing the workpiece. When positioning the workpiece, the sealing component of the adsorption mechanism seals the second connecting hole, thereby sealing the second suction hole. After the workpiece is placed on the air passage plate, the external suction device adsorbs the workpiece through the passage formed by the suction hole, air passage, first connecting hole, and first suction hole. Then, the suction intensity is increased. When the pressure generated in the second connecting hole is greater than the elastic force of the first elastic element, the sealing component compresses the first elastic element. At this time, the second connecting hole is opened, the second suction hole is connected to the air passage, and the second suction hole generates negative pressure to adsorb the workpiece, improving the adsorption and positioning effect. The aforementioned positioning device first adsorbs the workpiece through the first suction port, which improves the adsorption efficiency. Then, by increasing the suction intensity, multiple second suction ports open sequentially to adsorb the workpiece, effectively preventing workpiece deformation during adsorption. Furthermore, for workpieces that have already undergone deformation such as warping, the success rate of adsorption can be improved through step-by-step adsorption.

[0006] In some embodiments, the second connecting hole includes a receiving end and a communicating end disposed opposite to each other. The receiving end is disposed close to the substrate and is used to receive the first elastic member and the sealing member. The cross-sectional dimension of the receiving end is larger than the cross-sectional dimension of the sealing member. The communicating end communicates with the second air intake hole. The cross-sectional dimension of the communicating end is smaller than the cross-sectional dimension of the receiving end to form a constricted portion. The constricted portion is used to stop the sealing member to form a seal.

[0007] In some embodiments, the elastic force of the first elastic element in the plurality of second connecting holes in each of the connecting hole groups increases sequentially along the arrangement direction of the plurality of second air intake holes.

[0008] In some embodiments, both the first air intake and the second air intake have an extending direction, and the extending direction of the first air intake is parallel or perpendicular to the extending direction of the second air intake.

[0009] In some embodiments, the length of the first air intake hole is less than or equal to the length of the second air intake hole.

[0010] In some embodiments, the air passage is a groove formed on the side of the air passage plate near the substrate, and the air passage plate is connected to the substrate to seal the air passage.

[0011] In some embodiments, the airway includes a main airway and a plurality of branch airways. The main airway extends along the length of the airway plate and communicates with the suction port. The branch airways are perpendicular to the extension direction of the main airway. Alternatively, the plurality of branch airways are connected sequentially in a direction away from the main airway, and the extension directions of two adjacent branch airways are perpendicular to each other.

[0012] In some embodiments, a support protrusion is provided on the side of the air duct plate away from the substrate. The support protrusion is used to support the workpiece. The support protrusion is correspondingly provided with the air intake hole group. The openings of the first air intake hole and the plurality of second air intake holes are all provided on the support protrusion.

[0013] In some embodiments, the positioning device further includes a positioning mechanism, which includes a plurality of fixing members and a plurality of pushing components. The plurality of fixing members are disposed on the base plate and correspond to two adjacent sides of the air passage plate, respectively. The plurality of pushing components are disposed on the base plate and correspond to two other adjacent sides of the air passage plate, respectively. The pushing components are used to push the workpiece against the corresponding fixing members to position the workpiece.

[0014] In some embodiments, the pushing assembly includes a fixed block, a movable positioning member, and a second elastic member. The fixed block is fixedly connected to the base plate and spaced apart from the air duct plate. The movable positioning member is slidably connected to the base plate and disposed between the fixed block and the air duct plate. The second elastic member is disposed between the fixed block and the movable positioning member. The two ends of the second elastic member abut against the fixed block and the movable positioning member, respectively. The second elastic member is used to push the movable positioning member toward the air duct plate so that the movable positioning member pushes the workpiece. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the positioning device provided in an embodiment of this application.

[0016] Figure 2 for Figure 1 An exploded view of the positioning device shown.

[0017] Figure 3 for Figure 2 The diagram shows the structure of the adsorption mechanism.

[0018] Figure 4 for Figure 3 The image shows a bottom view of the adsorption mechanism.

[0019] Figure 5 for Figure 4 An enlarged schematic diagram of position V of the adsorption mechanism shown.

[0020] Figure 6 for Figure 5 The adsorption mechanism shown is a cross-sectional view along the VI-VI direction.

[0021] Explanation of main component symbols: Positioning device 100, base plate 10, suction hole 11, sliding hole 12, adsorption mechanism 20, air passage plate 21, air passage 211, main air passage 2111, branch passage 2112, suction hole group 212, first suction hole 2121, second suction hole 2122, connecting hole group 213, first connecting hole 2131, second connecting hole 2132, receiving end 2132a, connecting end 2132b, constriction part 2132c, support protrusion 214, sealing assembly 22, first elastic element 221, sealing element 222, positioning mechanism 30, fixing element 31, pushing assembly 32, fixing block 321, movable positioning element 322, second elastic element 323, toggle element 324, connecting rod 325, slide rail 326, workpiece 200. Detailed Implementation

[0022] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0023] In the description of this application, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, it should be noted that "a plurality of" means two or more, unless otherwise explicitly specified.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a connection that allows communication between the two components; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] The embodiments of this application will be further described below with reference to the accompanying drawings.

[0026] Please see Figure 1 and Figure 2 This application provides a positioning device 100 for positioning a workpiece 200, which can be a sheet-like or plate-like structural component. The positioning device 100 includes a substrate 10 and an adsorption mechanism 20.

[0027] Please see also Figure 3 and Figure 4 The substrate 10 has an air extraction hole 11, which is used to connect to an external air extraction device (not shown) to extract air from the air passage structure inside the substrate 10.

[0028] The adsorption mechanism 20 includes an air duct plate 21 and multiple sealing components 22. The air duct plate 21 is disposed on the substrate 10 and is used to support the workpiece 200. The air duct plate 21 has an air duct 211, an air intake hole group 212, and a connecting hole group 213. The air duct 211 is disposed on the side of the air duct plate 21 close to the substrate 10 and communicates with the suction hole 11. The air intake hole group 212 includes a first air intake hole 2121 and multiple second air intake holes 2122, all of which are located on the side of the air duct plate 21 away from the substrate 10. The connecting hole group 213 includes a first connecting hole 2131 and multiple second connecting holes 2132 formed within the air duct plate 21. The first connecting hole 2131 is used to connect the air duct 211 and the first air intake hole 2121. Multiple second connecting holes 2132 correspond one-to-one with multiple second suction holes 2122, and the second connecting holes 2132 are used to connect the air passage 211 and the corresponding second suction hole 2122. Multiple sealing components 22 are disposed one-to-one within the multiple second connecting holes 2132.

[0029] Please see also Figure 5 and Figure 6 The sealing assembly 22 includes a first elastic member 221 and a sealing member 222. The first elastic member 221 is disposed at one end of the second connection hole 2132 near the substrate 10, and the sealing member 222 is disposed at one end of the first elastic member 221 away from the substrate 10. The first elastic member 221 is used to push the sealing member 222 away from the substrate 10 to seal the second connection hole 2132.

[0030] Both the suction hole group 212 and the connecting hole group 213 can be set to one, two, three or more groups, and the suction hole group 212 and the connecting hole group 213 are set one-to-one. By setting multiple suction hole groups 212, multiple positions of the workpiece 200 can be adsorbed. The specific number and position of the suction hole group 212 can be set according to actual needs and are not limited here.

[0031] The air intake assembly 212 includes a first air intake 2121 and multiple second air intakes 2122, the number of which can be two, three, four, etc. The first air intake 2121 communicates with the air passage 211 through a first connecting hole 2131, and the second air intakes 2122 communicate with the air passage 211 through corresponding second connecting holes 2132. Each second connecting hole 2132 is provided with a sealing component 22, which is used to seal or open the second connecting hole 2132, thereby sealing or closing the second air intake 2122. The first elastic element 221 can be a spring or rubber, etc. In one scenario, when the air pressure generated in the second connecting hole 2132 is less than the elastic force of the first elastic element 221, the first elastic element 221 pushes the sealing element 222 away from the substrate 10, thereby sealing the second connecting hole 2132. When the air pressure generated in the second connecting hole 2132 is greater than the elastic force of the first elastic element 221, the sealing element 222 compresses the first elastic element 221, thereby opening the second connecting hole 2132. At this time, the second suction hole 2122 is connected to the air passage 211.

[0032] In other embodiments, each air intake hole group 212 may also be provided with two, three or more first air intake holes 2121, or with one second air intake hole 2122. The specific number can be set according to actual needs and is not limited here.

[0033] The positioning device 100 provided in this application embodiment has an air extraction hole 11 on the substrate 10 connected to the air passage 211 of the air passage plate 21 of the adsorption mechanism 20. The air passage 211 is connected to the first suction hole 2121 through the first connecting hole 2131 and to the second suction hole 2122 through the second connecting hole 2132, forming an air intake passage. After the air extraction hole 11 is connected to an external air extraction device, air can be extracted to generate negative pressure in the first suction hole 2121 and the second suction hole 2122, thereby adsorbing the workpiece 200. When positioning the workpiece 200, the sealing component 22 of the adsorption mechanism 20 seals the second connecting hole 2132, thereby sealing the second suction hole 2122. After the workpiece 200 is placed on the air passage plate 21, the external air extraction device adsorbs the workpiece 200 through the passage formed by the air extraction hole 11, the air passage 211, the first connecting hole 2131, and the first suction hole 2121. Then, the suction intensity is increased. When the pressure generated in the second connecting hole 2132 is greater than the elastic force of the first elastic element 221, the sealing element 222 compresses the first elastic element 221. At this time, the second connecting hole 2132 is opened, and the second suction hole 2122 is connected to the air passage 211. The second suction hole 2122 generates negative pressure to adsorb the workpiece 200, improving the adsorption and positioning effect. The positioning device 100 provided in this embodiment first adsorbs the workpiece 200 through the first suction hole 2121, which can improve the adsorption efficiency. Then, by increasing the suction intensity, multiple second suction holes 2122 are opened sequentially to adsorb the workpiece 200, which can effectively prevent the workpiece 200 from deforming during adsorption. For workpieces 200 that have already undergone deformation such as warping, the success rate of adsorption can be improved by adsorbing them step by step.

[0034] In some embodiments, see Figure 2 , Figure 5 and Figure 6The second connecting hole 2132 includes a receiving end 2132a and a communicating end 2132b disposed opposite to each other. The receiving end 2132a is disposed close to the substrate 10 and is used to receive the first elastic member 221 and the sealing member 222. The cross-sectional dimension of the receiving end 2132a is larger than the cross-sectional dimension of the sealing member 222. The communicating end 2132b communicates with the second suction hole 2122. The cross-sectional dimension of the communicating end 2132b is smaller than the cross-sectional dimension of the receiving end 2132a to form a constricted portion 2132c. The constricted portion 2132c is used to stop the sealing member 222 to form a seal. The receiving end 2132a and the communicating end 2132b form a constricted structure to ensure that the sealing member 222 is pressed against the constricted portion 2132c by the first elastic member 221 in its natural state, forming a reliable seal and preventing air leakage. The receiving end 2132a provides space for movement, allowing the seal 222 to move downwards under negative pressure, opening the airflow channel. After the negative pressure is removed, the first elastic element 221 can quickly reset the seal 222, ensuring the response speed and sealing stability of the adsorption system. The constricted portion 2132c can be an annular bevel to transition between the receiving end 2132a and the connecting end 2132b, facilitating the sealing of the second connecting hole 2132 by the seal 222. The seal 222 can be a spherical structure to improve its sealing effect.

[0035] In some embodiments, see Figure 2 , Figure 5 and Figure 6 In each connecting hole group 213, the elastic force of the first elastic element 221 within the plurality of second connecting holes 2132 increases sequentially along the arrangement direction of the plurality of second suction holes 2122. This creates a gradient adsorption control, preventing deformation of the workpiece 200. By using the first elastic elements 221 with sequentially increasing elastic force within the same connecting hole group 213, during the suction process, the elastic elements within the plurality of second connecting holes 2132 open in stages according to their elastic force ("opening" indicates that the corresponding second connecting hole 2132 is opened, not blocked). In the initial stage of low negative pressure, only the first elastic element 221 with a smaller elastic force corresponding to the second connecting hole 2132 opens, thus providing the connecting hole group 213 with basic adsorption force, preventing deformation or damage to the thin-walled workpiece 200 caused by instantaneous strong adsorption. In the subsequent stage of increasing negative pressure, the second connecting holes 2132 corresponding to the first elastic element 221 with a larger elastic force gradually open, enhancing the overall adsorption force and ensuring the final stable fixation of the workpiece 200.

[0036] In some embodiments, see Figure 2 and Figure 3Both the first suction hole 2121 and the second suction hole 2122 have an extending direction, which is parallel or perpendicular to the extending direction of the first suction hole 2121 and the second suction hole 2122. Both the first suction hole 2121 and the second suction hole 2122 can be strip-shaped holes. Compared with circular holes, the strip-shaped holes 2121 and 2122 have a larger adsorption length, enabling a more uniform distribution of adsorption force. This results in a more even stress distribution on the workpiece 200 during adsorption, reducing deformation or damage to the workpiece 200 caused by uneven adsorption force. The parallel or perpendicular arrangement forms a regular adsorption force distribution grid, effectively avoiding localized adsorption force concentration and ensuring uniform stress on the workpiece 200. The mutually perpendicular arrangement of the first suction hole 2121 and the second suction hole 2122 effectively fulfills the adsorption requirements of the workpiece 200 while maintaining the stability of the workpiece 200 under localized stress.

[0037] In some embodiments, see Figure 2 and Figure 3 The length of the first suction hole 2121 is less than or equal to the length of the second suction hole 2122. Thus, the first suction hole 2121, being less than or equal to the length of the second suction hole 2122, can preferentially act on the central region of the workpiece 200, ensuring initial adsorption stability. The second suction hole 2122, being greater than or equal to the length of the first suction hole 2121, can cover a larger edge region of the workpiece 200. When the second suction hole 2122 is activated, it can provide additional adsorption force, preventing warping or displacement of the workpiece 200 due to insufficient edge adsorption.

[0038] In some embodiments, see Figure 4 The air passage 211 is a groove formed on the side of the air passage plate 21 near the substrate 10. The air passage plate 21 is connected to the substrate 10 to seal the air passage 211. The groove-shaped air passage 211 is easy to process and helps to reduce the manufacturing cost of the air passage plate 21. In other embodiments, the air passage 211 can also be a hole formed in the air passage plate 21, so that the air passage 211 itself has a certain degree of airtightness.

[0039] In some embodiments, see Figure 4The airway 211 includes a main airway 2111 and multiple branch airways 2112. The main airway 2111 is located approximately in the middle of the airway plate 21 and communicates with the suction port 11. In one example, the main airway 2111 extends approximately along the length of the airway plate 21, and the branch airways 2112 communicate with the main airway 2111, with the extension direction of the branch airways 2112 approximately perpendicular to that of the main airway 2111. In another example, the multiple branch airways 2112 are connected sequentially in a direction away from the main airway 2111, and the extension directions of any two adjacent branch airways 2112 can be perpendicular to each other. The main airway 2111 serves as a central air collection area, and the branch airways 2112 serve as branch channels, thus enabling the negative pressure of the entire airway 211 to be quickly and evenly transmitted to all the first suction ports 2121 and the second suction ports 2122. The straight branch channel 2112 is suitable for long-distance transportation. Two adjacent branch channels 2112 are connected to form a right angle. The branch channel 2112 is suitable for areas with limited space.

[0040] In some embodiments, see Figure 2 and Figure 3 A support protrusion 214 is provided on the side of the air duct plate 21 facing away from the base plate 10. The support protrusion 214 is used to support the workpiece 200. The support protrusion 214 is correspondingly arranged with the suction hole group 212. The openings of the first suction hole 2121 and multiple second suction holes 2122 are all located on the support protrusion 214. It can be understood that when there are multiple suction hole groups 212, there are also multiple support protrusions 214, such as two or three, etc., and multiple support protrusions 214 are arranged one-to-one with multiple suction hole groups 212. By setting the support protrusion 214, a gap can be made between the area of ​​the workpiece 200 that does not need to be adsorbed and the air duct plate 21, which facilitates material unloading. Moreover, the contact area between the support protrusion 214 and the workpiece 200 is significantly smaller than that of the planar support, which can reduce the risk of scratching the surface of the workpiece 200 during movement or positioning. The first suction hole 2121 and the second suction hole 2122 are both located on the support protrusion 214, so that the adsorption force acts directly on the key support area of ​​the workpiece 200, improving the adsorption stability and reducing the risk of deformation of the workpiece 200.

[0041] In some embodiments, see Figure 1 and Figure 2The positioning device 100 also includes a positioning mechanism 30, which includes multiple fixing members 31 and multiple pushing components 32. The fixing members 31 are all disposed on the base plate 10 and correspond to two adjacent sides of the air duct plate 21, respectively. The pushing components 32 are all disposed on the base plate 10 and correspond to two other adjacent sides of the air duct plate 21, respectively. The pushing components 32 are used to push the workpiece 200 against the corresponding fixing member 31 to position the workpiece 200. The number of fixing members 31 and pushing components 32 can be two, three, four, etc. Through the cooperation of multiple fixing members 31 and multiple pushing components 32, a bidirectional positioning system is formed. The fixing members 31 provide a reference positioning surface, and the pushing components 32 apply a controllable pushing force, which can simultaneously position the workpiece 200 from multiple directions, ensuring a more accurate position of the workpiece 200 after adsorption, thereby improving positioning accuracy.

[0042] In some embodiments, see Figure 1 and Figure 2 The pushing component 32 includes a fixed block 321, a movable positioning member 322, and a second elastic member 323. The fixed block 321 is fixedly connected to the base plate 10 and spaced apart from the air duct plate 21. The movable positioning member 322 is slidably connected to the base plate 10 and disposed between the fixed block 321 and the air duct plate 21. The second elastic member 323 is disposed between the fixed block 321 and the movable positioning member 322, with its two ends abutting against the fixed block 321 and the movable positioning member 322, respectively. The second elastic member 323 is used to push the movable positioning member 322 toward the air duct plate 21, so that the movable positioning member 322 pushes the workpiece 200. The second elastic member 323 can be a spring, etc. To improve the stability of the movement of the second elastic member 323 pushing the movable positioning member 322, two, three, four, etc., second elastic members 323 can be provided. Through the elastic pushing action of the second elastic element 323, the movable positioning element 322 can adapt to workpieces 200 of different sizes. The elastic force of the second elastic element 323 can ensure that the movable positioning element 322 tightly pushes the workpiece 200 against the opposite fixed element 31, thereby achieving precise positioning of the workpiece 200.

[0043] In some embodiments, see Figure 1 and Figure 2 The pushing assembly 32 also includes a toggle member 324, which is connected to the movable positioning member 322. The toggle member 324 is used to move the movable positioning member 322 away from the air duct plate 21 under the action of external force. The toggle member 324 can be a block structure. By using the toggle member 324, the movable positioning member 322 can be easily moved away from the air duct plate 21. When it is necessary to replace the workpiece 200 or adjust the position of the workpiece 200, the operator can easily move the movable positioning member 322 away, thereby quickly releasing the workpiece 200 and improving the convenience of operation.

[0044] In some embodiments, see Figure 1 and Figure 2 The base plate 10 has a sliding hole 12 arranged along the movement direction of the movable positioning member 322. The sliding hole 12 is located between the fixed block 321 and the air duct plate 21 and is opposite to the movable positioning member 322. The pushing assembly 32 also includes a connecting rod 325, which is slidably disposed in the sliding hole 12. One end of the connecting rod 325 is connected to the movable positioning member 322, and the other end of the connecting rod 325 extends out of the base plate 10 away from the air duct plate 21 and is connected to the actuating member 324. By opening the sliding hole 12 on the base plate 10 and setting the connecting rod 325 to slide therein, the movement direction and position of the movable positioning member 322 can be precisely controlled. It can also be ensured that the movable positioning member 322 can move along a predetermined trajectory when pushing the workpiece 200, thereby improving the positioning accuracy. The cooperation between the sliding hole 12 and the connecting rod 325 can reduce the offset or vibration of the movable positioning member 322 during the movement process, ensuring that the movable positioning member 322 can stably push the workpiece 200 to the fixed member 31, thereby reducing positioning errors. The sliding hole 12 provides a stable sliding path for the movable positioning component 322, making its movement smoother and reducing the positional deviation of the workpiece 200 caused by the unstable movement of the movable positioning component 322, thereby enhancing the stability of positioning.

[0045] In some embodiments, see Figure 1 and Figure 2 The pushing component 32 also includes a slide rail 326, which is connected to the base plate 10 and extends along the movement direction of the movable positioning member 322. The movable positioning member 322 is slidably disposed on the slide rail 326. The slide rail 326 provides a precise sliding path for the movable positioning member 322, ensuring that the movable positioning member 322 can move smoothly along a predetermined trajectory during movement, significantly improving the movement accuracy of the movable positioning member 322, thereby improving the positioning accuracy of the workpiece 200. Guided by the slide rail 326, the movement of the movable positioning member 322 is more stable and accurate, reducing positioning errors caused by unstable movement, and ensuring that the workpiece 200 can be accurately fixed in a predetermined position after adsorption, thereby improving the accuracy of the entire positioning device 100.

[0046] The operation of the positioning device 100 provided in this embodiment is roughly as follows:

[0047] First, the actuating member 324 drives the movable positioning member 322 away from the air duct plate 21. Then, the workpiece 200 is placed on the air duct plate 21. Then, the actuating member 324 is released, and the second elastic member 323 pushes the movable positioning member 322 to push the workpiece 200 to the corresponding fixing member 31, thus completing the positioning of the workpiece 200 on the horizontal plane.

[0048] Next, air is drawn out by an external air extraction device. At this time, the second air intake hole 2122 is sealed. The passage formed by the air extraction hole 11, the air channel 211, the first connecting hole 2131 and the first air intake hole 2121 generates negative pressure by drawing air in the first air intake hole 2121, which initially adsorbs the workpiece 200.

[0049] Then, the suction intensity is increased. When the pressure generated in the second connecting hole 2132 is greater than the elastic force of the first elastic element 221, the sealing element 222 compresses the first elastic element 221. At this time, the second connecting hole 2132 is opened, and the second suction hole 2122 is connected to the air passage 211. The second suction hole 2122 generates negative pressure to adsorb the workpiece 200, thereby improving the adsorption and positioning effect.

[0050] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be regarded as exemplary and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be embraced within this application.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A positioning device, characterized in that, include: The substrate has vent holes. and An adsorption mechanism includes an air duct plate and multiple sealing components. The air duct plate is disposed on the substrate and is used to support the workpiece. The air duct plate has an air duct, a group of suction holes, and a group of connecting holes. The air duct is disposed on the side of the air duct plate near the substrate and communicates with the suction hole. The group of suction holes includes a first suction hole and multiple second suction holes, both of which are located on the side of the air duct plate away from the substrate. The group of connecting holes includes a first connecting hole and multiple second connecting holes within the air duct plate. The first connecting hole connects the air duct and the first suction hole. Each of the multiple second connecting holes corresponds to a single second suction hole and connects the air duct and the corresponding second suction hole. Multiple sealing components are disposed in the multiple second connecting holes. Each sealing component includes a first elastic element and a sealing element. The first elastic element is disposed at the end of the second connecting hole near the substrate, and the sealing element is disposed at the end of the first elastic element away from the substrate. The first elastic element pushes the sealing element away from the substrate to seal the second connecting hole.

2. The positioning device as described in claim 1, characterized in that, The second connecting hole includes a receiving end and a communicating end disposed opposite to each other. The receiving end is disposed close to the substrate and is used to receive the first elastic member and the sealing member. The cross-sectional dimension of the receiving end is larger than the cross-sectional dimension of the sealing member. The communicating end communicates with the second air intake hole. The cross-sectional dimension of the communicating end is smaller than the cross-sectional dimension of the receiving end to form a constricted portion. The constricted portion is used to stop the sealing member to form a seal.

3. The positioning device as described in claim 1, characterized in that, The elastic force of the first elastic element in the plurality of second connecting holes in each of the connecting hole groups increases sequentially along the arrangement direction of the plurality of second air intake holes.

4. The positioning device as described in claim 1, characterized in that, Both the first and second air intake holes have an extending direction, and the extending direction of the first air intake hole is parallel or perpendicular to the extending direction of the second air intake hole.

5. The positioning device as described in claim 1, characterized in that, The length of the first air intake hole is less than or equal to the length of the second air intake hole.

6. The positioning device as described in claim 1, characterized in that, The air passage is a groove formed on the side of the air passage plate near the substrate, and the air passage plate is connected to the substrate to seal the air passage.

7. The positioning device as described in claim 1, characterized in that, The airway includes a main airway and multiple branch airways. The main airway extends along the length of the airway plate and communicates with the suction port. The branch airways communicate with the main airway and are perpendicular to the extension direction of the main airway; or... The multiple branch channels are connected sequentially in a direction away from the main airway, and the extension directions of two adjacent branch channels are perpendicular to each other.

8. The positioning device as described in claim 1, characterized in that, The air duct plate has a support protrusion on the side opposite to the base plate. The support protrusion is used to support the workpiece. The support protrusion is correspondingly arranged with the air intake hole group. The openings of the first air intake hole and a plurality of second air intake holes are all arranged on the support protrusion.

9. The positioning device as described in claim 1, characterized in that, The positioning device further includes a positioning mechanism, which includes multiple fixing members and multiple pushing components. The multiple fixing members are disposed on the base plate and correspond to two adjacent sides of the air passage plate, respectively. The multiple pushing components are disposed on the base plate and correspond to two other adjacent sides of the air passage plate, respectively. The pushing components are used to push the workpiece against the corresponding fixing members to position the workpiece.

10. The positioning device as described in claim 9, characterized in that, The pushing assembly includes a fixed block, a movable positioning member, and a second elastic member. The fixed block is fixedly connected to the base plate and spaced apart from the air duct plate. The movable positioning member is slidably connected to the base plate and disposed between the fixed block and the air duct plate. The second elastic member is disposed between the fixed block and the movable positioning member. The two ends of the second elastic member abut against the fixed block and the movable positioning member, respectively. The second elastic member is used to push the movable positioning member toward the air duct plate so that the movable positioning member pushes against the workpiece.

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