Positioning device

Abstract

This application provides a positioning device to improve positioning accuracy at low cost, comprising: a base; a bearing assembly including a bearing member and a cover plate member, the bearing member being configured to be placed on the base and bear a workpiece, the bearing member having a through hole and an adsorption groove, the through hole penetrating the upper and lower sides of the bearing member, the two openings of the adsorption groove being located on the upper and lower surfaces of the bearing member respectively, and the cover plate member covering the bearing member to press the workpiece against the bearing member; a positioning assembly including a positioning member, a connecting member, a lifting member, and a jacking member, the positioning member being inserted into the through hole and extending out of the bearing member to position the workpiece, the connecting member being located on the side of the bearing member away from the cover plate member, the positioning member being movably inserted through the connecting member, the connecting member being configured to abut against the opening of the adsorption groove to connect the adsorption groove and adsorb the workpiece onto the bearing member, the lifting member being connected to the positioning member, the lifting member being used to drive the positioning member out of the through hole, and the jacking member being connected to the lifting member and the connecting member respectively.

Description

Technical Field

[0001] This utility model relates to the field of positioning technology, and in particular to a positioning device. Background Technology

[0002] In the processing of flat cables, the flat cable is typically first attached to a steel plate using tape to position it. Then, the steel plate with the flat cable attached is placed in a carrier, and a cover plate presses down on the flat cable to secure it to the carrier. Finally, the carrier and the flat cable are transferred together to heating equipment for further processing. However, tape is highly susceptible to deformation at high temperatures, causing the flat cable to shift within the carrier and reducing positioning accuracy. Furthermore, both tape and steel plate are disposable consumables, and their usage is significant during processing, increasing the cost of positioning the flat cable. Utility Model Content

[0003] In view of the above situation, it is necessary to provide a positioning device to improve positioning accuracy at a low cost.

[0004] This application provides a positioning device, including: Base; A support assembly includes a support member and a cover plate. The support member is configured to be placed on the base and used to support a workpiece. The support member has a through hole and an adsorption groove. The through hole extends through the upper and lower sides of the support member. The two openings of the adsorption groove are respectively located on the upper and lower surfaces of the support member. The cover plate covers the support member to press the workpiece against the support member. A positioning assembly includes a positioning element, a connecting element, a lifting element, and a jacking element. The positioning element is inserted into the through hole and extends out of the carrier to position the workpiece. The connecting element is located on the side of the carrier away from the cover plate. The positioning element is movably inserted through the connecting element and is configured to abut against the opening of the adsorption groove to connect the adsorption groove and adsorb the workpiece to the carrier. The lifting element is connected to the positioning element and is used to drive the positioning element to disengage from the through hole. The jacking element is connected to the lifting element and the connecting element respectively and is configured to drive the positioning element and the connecting element to move simultaneously toward the carrier.

[0005] In use, the aforementioned positioning device first moves the lifting member, positioning member, and connecting member closer to the carrier member, so that the positioning member is inserted into the through hole and extends out of the carrier member, while the connecting member abuts against the opening of the adsorption groove to connect the adsorption groove. Then, the workpiece is placed on the carrier member, and the positioning member extending out of the carrier member positions the workpiece. The adsorption groove, guided by the connecting member, adsorbs the positioned workpiece onto the carrier member. Next, the lifting member moves the positioning member away from the carrier member, so that the positioning member disengages from the through hole, and the cover plate presses the positioned workpiece against the carrier member. Finally, the lifting member disengages the connecting member from the carrier member, moving the carrier member, cover plate, and positioned workpiece to a preset position. Thus, the positioning device positions the workpiece to a preset position and orientation using the positioning member, adsorbs the positioned workpiece through the adsorption groove, and presses the positioned workpiece against the carrier member using the cover plate, preventing positional shift of the workpiece in subsequent processes. This achieves rapid and accurate workpiece positioning without the need for consumables, improving positioning accuracy at a low cost.

[0006] In some embodiments, the number of through holes is multiple, and the multiple through holes are spaced apart along a direction perpendicular to the movement direction of the connecting member. The positioning member includes: A positioning plate is located on the side of the connecting member opposite to the bearing member and is connected to the lifting member; Multiple positioning bodies are spaced apart on the positioning plate and correspond one-to-one with the multiple through holes. The multiple positioning bodies are movably inserted through the connecting member and inserted into the corresponding through holes. The multiple positioning bodies enclose a positioning space to position the workpiece.

[0007] In some embodiments, the opening of the adsorption groove away from the connecting member is located in a positioning space formed by the plurality of positioning bodies.

[0008] In some embodiments, the positioning component further includes: The bearing component is embedded in the positioning plate; A guide member is movably inserted through the bearing member and connected to the connecting member, and the guide member is configured to guide the positioning plate.

[0009] In some embodiments, the connecting element includes: A movable plate is disposed on the side of the bearing member away from the cover plate and connected to the lifting member. The positioning member is movably inserted through the movable plate, and the movable plate is provided with a connecting groove. A connecting body, disposed on the side of the movable plate facing the support member and connected to one end of the connecting groove, is configured to abut against the opening of the adsorption groove under the action of the movable plate, thereby connecting the adsorption groove; and A conductor is disposed on the movable plate and is connected to the other end of the connecting groove and an external air source, respectively.

[0010] In some embodiments, the connected body includes: A connecting portion is embedded in the movable plate and communicates with the connecting groove; A sealing part is fitted onto the connecting part and extends out of the upper surface of the connecting part.

[0011] In some embodiments, the lifting member includes: A fixed body is located on the side of the positioning plate opposite to the connecting member and is connected to the lifting member; A support body, spaced apart from the lifting component, is movably inserted through the positioning plate and connected to both the connecting component and the fixing body; and A lifting body is connected to the fixed body, and the lifting body is configured to drive the fixed body to move the lifting component and the support body simultaneously toward the carrier component.

[0012] In some embodiments, the base includes: Two support plates are provided on both sides of the carrier, and the support plates are provided with support grooves near the end of the carrier, the support grooves being configured to accommodate part of the carrier; A base plate is disposed on the side of the lifting member away from the bearing member and is respectively connected to the two support plates. The base plate and the two support plates form a storage space for storing the positioning component.

[0013] In some embodiments, the carrier includes: A base is configured to be placed on the pedestal; A sealing body is disposed on the side of the base opposite to the connecting member; and A support body is disposed on the side of the sealing body opposite to the base and is detachably connected to the base. The support body is used to support the workpiece. The through hole and the adsorption groove both pass through the base, the sealing body and the carrier in sequence.

[0014] In some embodiments, the positioning device further includes: A pressing assembly is disposed on one side of the base and connected to the base, the pressing assembly being configured to press the carrier member against the base. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the positioning device provided in the embodiments of this application.

[0016] Figure 2 for Figure 1 The diagram shows a partial cross-sectional view of the positioning device along the II-II direction.

[0017] Figure 3 for Figure 1 The diagram shows a partially enlarged view of the positioning device at position A.

[0018] Explanation of main component symbols: Positioning device 100, base 10, support plate 11, support groove 111, base plate 12, storage space 13, bearing assembly 20, bearing component 21, through hole 211, adsorption groove 212, base 213, sealing body 214, bearing body 215, cover plate 22, positioning assembly 30, positioning component 31, positioning plate 311, positioning body 312, positioning space 313, connecting component 32, moving plate 321, connecting groove 3211, connecting body 322, connecting part 3221, sealing part 3222, guide body 323, lifting component 33, lifting component 34, fixing body 341, support body 342, lifting body 343, bearing component 35, guide component 36, pressing assembly 40, pressing drive component 41, pressing component 42. Detailed Implementation

[0019] 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.

[0020] 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.

[0021] 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.

[0022] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0023] Please see Figure 1 This application provides a positioning device 100, which includes a base 10, a bearing component 20, and a positioning component 30. The positioning device 100 is used to position a workpiece. The workpiece can be a flat cable.

[0024] Please see Figure 1 , Figure 2 and Figure 3 The support assembly 20 includes a support member 21 and a cover plate 22. The support member 21 is configured to be placed on the base 10 and used to support the workpiece. The support member 21 has a through hole 211 and an adsorption groove 212. The through hole 211 passes through the upper and lower sides of the support member 21. The two openings of the adsorption groove 212 are located on the upper and lower surfaces of the support member 21, respectively. The cover plate 22 covers the support member 21 to press the workpiece against the support member 21. The positioning assembly 30 includes a positioning member 31, a connecting member 32, a lifting member 33, and a jacking member 34. The positioning member 31 is inserted into the through hole 211 and extends out of the carrier member 21 to position the workpiece. The connecting member 32 is located on the side of the carrier member 21 away from the cover plate member 22, and the positioning member 31 is movably inserted through the connecting member 32. The connecting member 32 is configured to abut against the opening of the adsorption groove 212 to connect with the adsorption groove 212 and adsorb the workpiece to the carrier member 21. The lifting member 33 is connected to the positioning member 31 and is used to drive the positioning member 31 to disengage from the through hole 211. The jacking member 34 is connected to the lifting member 33 and the connecting member 32 respectively, and is configured to drive the positioning member 31 and the connecting member 32 to move simultaneously toward the carrier member 21. For example, the lifting member 33 can be a cylinder.

[0025] When the aforementioned positioning device 100 is in use, firstly, the lifting member 34 drives the positioning member 31 and the connecting member 32 to move closer to the carrier member 21, so that the positioning member 31 is inserted into the through hole 211 and extends out of the carrier member 21, while the connecting member 32 abuts against the opening of the adsorption groove 212 to connect the adsorption groove 212; then, the workpiece is placed on the carrier member 21, and the positioning member 31 extending out of the carrier member 21 positions the workpiece, and the adsorption groove 212 adsorbs the positioned workpiece to the carrier member 21 under the conduction of the connecting member 32; next, the lifting member 33 drives the positioning member 31 to move away from the carrier member 21, so that the positioning member 31 disengages from the through hole 211, and the cover plate member 22 presses against the positioned workpiece to the carrier member 21; finally, the lifting member 34 drives the connecting member 32 to disengage from the carrier member 21, so that the carrier member 21, together with the cover plate member 22 and the positioned workpiece, is moved to a preset position. In this way, the positioning device 100 positions the workpiece to a preset position and orientation through the positioning member 31, and adsorbs the positioned workpiece through the adsorption groove 212, so that the cover plate member 22 presses the positioned workpiece against the carrier member 21, preventing the workpiece from shifting position in subsequent processes, thus achieving fast and accurate positioning of the workpiece without the need for consumables, thereby improving positioning accuracy at low cost.

[0026] It is understood that the cover plate 22 and the support member 21 can be connected and fixed by means of snap-fit, magnetic attraction, etc., to ensure that the cover plate 22 stably presses the workpiece against the support member 21. In this embodiment, the support member 21 is embedded with a magnet (not shown), and the cover plate 22 is provided with an adapter (not shown) at the position corresponding to the magnet, so that the magnet stably magnetically attracts the adapter to fix the cover plate 22 to the support member 21. Exemplarily, the adapter can be an iron sheet, a magnetic sheet that magnetically attracts the magnet, etc.

[0027] Please see Figure 2 and Figure 3 In some embodiments, there are multiple through holes 211, which are spaced apart along a direction perpendicular to the movement direction of the connecting member 32. The positioning member 31 includes a positioning plate 311 and multiple positioning bodies 312. The positioning plate 311 is located on the side of the connecting member 32 away from the supporting member 21 and is connected to the lifting member 33. The multiple positioning bodies 312 are spaced apart on the positioning plate 311 and are arranged one-to-one with the multiple through holes 211. The multiple positioning bodies 312 are movably inserted through the connecting member 32 and inserted into the corresponding through holes 211. The multiple positioning bodies 312 enclose a positioning space 313 to position the workpiece.

[0028] Thus, through the above arrangement, multiple positioning bodies 312 are inserted into the corresponding through holes 211 under the drive of the positioning plate 311, so that the multiple positioning bodies 312 extending out of the through holes 211 form a positioning space 313 that is compatible with the workpiece, thereby achieving precise positioning of the workpiece and improving positioning accuracy.

[0029] Please see Figure 3 In some embodiments, the opening of the adsorption groove 212 away from the connecting member 32 is located in the positioning space 313 formed by the plurality of positioning bodies 312.

[0030] Thus, through the above settings, the adsorption tank 212 can stably adsorb the workpiece located in the positioning space 313, ensuring that the adsorption tank 212 adsorbs and fixes the workpiece to the carrier 21, avoiding misalignment between the opening of the adsorption tank 212 and the workpiece, and improving the adsorption stability.

[0031] It can be understood that there are multiple adsorption tanks 212, and the openings of the multiple adsorption tanks 212 are spaced apart in the positioning space 313 to adsorb different positions of the workpiece, thereby further improving the adsorption stability.

[0032] Please see Figure 1 In some embodiments, the positioning assembly 30 further includes a bearing 35 and a guide 36. The bearing 35 is embedded in the positioning plate 311, and the guide 36 is movably disposed through the bearing 35 and connected to the connecting member 32. The guide 36 is configured to guide the positioning plate 311. Exemplarily, the bearing 35 may be a linear bearing.

[0033] Thus, through the above settings, the guide member 36 guides the positioning plate 311 under the limit of the bearing member 35, ensuring that the positioning plate 311 stably drives the positioning body 312 to be inserted into the through hole 211, avoiding misalignment between the positioning body 312 and the through hole 211, and improving positioning stability.

[0034] Please see Figure 1 and Figure 2 In some embodiments, the connecting member 32 includes a movable plate 321, a connecting body 322, and a guide body 323. The movable plate 321 is located on the side of the supporting member 21 facing away from the cover plate member 22 and is connected to the lifting member 34. The positioning member 31 is movably inserted through the movable plate 321, and the movable plate 321 is provided with a connecting groove 3211. The connecting body 322 is located on the side of the movable plate 321 facing the supporting member 21 and is connected to one end of the connecting groove 3211. The connecting body 322 is configured to abut against the opening of the adsorption groove 212 under the action of the movable plate 321 to connect the adsorption groove 212. The guide body 323 is located on the movable plate 321 and is connected to the other end of the connecting groove 3211 and an external air source, respectively.

[0035] Thus, through the above configuration, the moving plate 321 moves closer to the bearing member 21 under the lifting of the lifting member 34, so that it abuts against the opening of the adsorption tank 212 to connect the adsorption tank 212. This allows the adsorption tank 212 to be connected to the external air source through the connecting body 322 and the connecting groove 3211, ensuring that the adsorption tank 212 stably adsorbs the workpiece under the conduction of the external air source, thereby improving the adsorption stability.

[0036] Please see Figure 2 In some embodiments, the connecting body 322 includes a connecting portion 3221 and a sealing portion 3222. The connecting portion 3221 is embedded in the movable plate 321 and communicates with the connecting groove 3211. The sealing portion 3222 is sleeved on the connecting portion 3221 and extends out of the upper surface of the connecting portion 3221. Exemplarily, the connecting portion 3221 can be any connecting pipe, connecting sleeve, or similar connecting cylinder capable of communicating with the connecting groove 3211, and the sealing portion 3222 can be a sealing gasket.

[0037] Thus, with the above arrangement, when the moving plate 321 drives the connecting body 322 to move closer to the carrier 21, the sealing part 3222 extends out of the upper surface of the connecting part 3221, allowing the carrier 21 to compress the sealing part 3222 to the moving plate 321. This ensures that the sealing part 3222 stably seals the connection between the connecting part 3221 and the adsorption tank 212, which helps maintain the sealing between the connecting body 322 and the adsorption tank 212, prevents gas leakage when the adsorption tank 212 adsorbs the workpiece, and improves the adsorption stability.

[0038] Please see Figure 1 In some embodiments, the lifting member 34 includes a fixed body 341, a support body 342, and a lifting body 343. The fixed body 341 is disposed on the side of the positioning plate 311 opposite to the connecting member 32 and is connected to the lifting member 33. The support body 342 is spaced apart from the lifting member 33, movably passing through the positioning plate 311, and is connected to both the connecting member 32 and the fixed body 341. The lifting body 343 is connected to the fixed body 341 and is configured to drive the fixed body 341 to simultaneously move the lifting member 33 and the support body 342 toward the carrier member 21. Exemplarily, the lifting body 343 can be a cylinder.

[0039] Thus, through the above configuration, the lifting body 343 drives the fixing body 341 to stably move the lifting component 33 and the support body 342 close to the bearing component 21 at the same time, so as to ensure that the positioning component 31 is inserted into the through hole 211, and at the same time ensure that the connecting body 322 is connected to the adsorption groove 212, thereby improving the positioning stability.

[0040] Please see Figure 1 In some embodiments, the base 10 includes two support plates 11 and a base plate 12. The two support plates 11 are disposed on both sides of the support member 21, and the ends of the support plates 11 adjacent to the support member 21 are provided with support grooves 111, which are configured to receive part of the support member 21 to support the support member 21. The base plate 12 is disposed on the side of the lifting member 34 opposite to the support member 21 and is respectively connected to the two support plates 11. The base plate 12 and the two support plates 11 form a storage space 13, which is used to store the positioning assembly 30.

[0041] Thus, through the above arrangement, the support plate 11 accommodates part of the carrier 21 through the support groove 111 to stably support the carrier 21, prevent the carrier 21 from shaking, and ensure that the positioning device 100 performs positioning operations stably, thereby improving positioning stability. In addition, the storage space 13 formed by the base plate 12 and the two support plates 11 can accommodate the positioning component 30, so that the positioning device 100 is reasonably arranged to simplify the structure of the positioning device 100.

[0042] Please see Figure 2 In some embodiments, the carrier 21 includes a base 213, a sealing body 214, and a carrier 215. The base 213 is configured to rest on the base 10, the sealing body 214 is located on the side of the base 213 opposite to the connecting member 32, and the carrier 215 is located on the side of the sealing body 214 opposite to the base 213 and detachably connected to the base 213. The carrier 215 is configured to carry a workpiece. The through hole 211 and the adsorption groove 212 both sequentially penetrate the base 213, the sealing body 214, and the carrier 215. Exemplarily, the sealing body 214 can be any sealing sheet, gasket, or similar sealing plate capable of sealing the base 213 and the carrier 215.

[0043] Thus, through the above-mentioned arrangement, the carrier 21 forms a split structure, which facilitates assembly and maintenance and reduces the cost of use. At the same time, the sealing body 214 seals the base 213 and the carrier 215 to prevent gas leakage when the adsorption tank 212 adsorbs the workpiece, thereby improving the adsorption stability.

[0044] Please see Figure 1 In some embodiments, the positioning device 100 further includes a pressing component 40, which is disposed on one side of the base 10 and connected to the base 10, and is configured to press the carrier 21 to the base 10.

[0045] Thus, through the above-mentioned arrangement, the holding component 40 can press the carrier 21 to the base 10, further enhancing the stability of the carrier 21 on the base 10, preventing the carrier 21 from shifting or shaking during the positioning process, and improving the positioning stability and positioning accuracy.

[0046] Please see Figure 1 Specifically, the holding assembly 40 includes a holding drive 41 and a holding member 42. The holding drive 41 is disposed on the base 10 and connected to the holding member 42. The holding drive 41 drives the holding member 42 to rotate above the support member 21 and move closer to the support member 21 to hold the support member 21 against the base 10. Exemplarily, the holding drive 41 can be a rotary telescopic cylinder.

[0047] The working process of the positioning device 100 described above is roughly as follows: First, the lifting member 34 drives the positioning plate 311 and the moving plate 321 to move close to the carrier member 21 at the same time, so that multiple positioning bodies 312 are respectively inserted into the corresponding through holes 211 and extend out of the carrier member 21 to form a positioning space 313. At the same time, the connecting body 322 abuts against the opening of the adsorption groove 212 to connect the adsorption groove 212. Then, the workpiece is placed on the carrier 21, and the positioning space 313 formed by multiple positioning bodies 312 positions the workpiece. The adsorption groove 212 adsorbs the positioned workpiece to the carrier 21 under the conduction of the connecting body 322. Next, the lifting component 33 drives the positioning plate 311 to move away from the carrier component 21, so that the multiple positioning bodies 312 disengage from the corresponding through holes 211 respectively. The cover plate 22 presses the positioned workpiece against the carrier component 21 to prevent the workpiece from shifting in position in subsequent processes, thereby achieving fast and accurate positioning of the workpiece without the need for consumables, thus improving positioning accuracy at low cost. Finally, the lifting member 34 drives the moving plate 321 to move away from the carrier member 21, so that the connecting body 322 and the carrier member 21 are disengaged from each other, so as to move the carrier member 21 together with the cover plate member 22 and the positioned workpiece to the preset position.

[0048] 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: Base; A support assembly includes a support member and a cover plate. The support member is configured to be placed on the base and used to support a workpiece. The support member has a through hole and an adsorption groove. The through hole passes through the upper and lower sides of the support member. The two openings of the adsorption groove are respectively located on the upper and lower surfaces of the support member. The cover plate is placed on the support member to press the workpiece against the support member. and A positioning assembly includes a positioning element, a connecting element, a lifting element, and a jacking element. The positioning element is inserted into the through hole and extends out of the carrier to position the workpiece. The connecting element is located on the side of the carrier away from the cover plate. The positioning element is movably inserted through the connecting element and is configured to abut against the opening of the adsorption groove to connect the adsorption groove and adsorb the workpiece to the carrier. The lifting element is connected to the positioning element and is used to drive the positioning element to disengage from the through hole. The jacking element is connected to the lifting element and the connecting element respectively and is configured to drive the positioning element and the connecting element to move simultaneously toward the carrier.

2. The positioning device of claim 1, wherein, The number of through holes is multiple, and the multiple through holes are spaced apart along a direction perpendicular to the movement direction of the connecting member. The positioning member includes: A positioning plate is located on the side of the connecting member opposite to the bearing member and is connected to the lifting member; Multiple positioning bodies are spaced apart on the positioning plate and correspond one-to-one with the multiple through holes. The multiple positioning bodies are movably inserted through the connecting member and inserted into the corresponding through holes. The multiple positioning bodies enclose a positioning space to position the workpiece.

3. The positioning device of claim 2, wherein, The opening of the adsorption groove, which is away from the connecting member, is located in the positioning space formed by the plurality of positioning bodies.

4. The positioning device of claim 2, wherein, The positioning component also includes: The bearing component is embedded in the positioning plate; A guide member is movably inserted through the bearing member and connected to the connecting member, and the guide member is configured to guide the positioning plate.

5. The positioning device of claim 1, wherein, The connecting element includes: A movable plate is disposed on the side of the bearing member away from the cover plate and connected to the lifting member. The positioning member is movably inserted through the movable plate, and the movable plate is provided with a connecting groove. A connecting body, disposed on the side of the movable plate facing the support member and connected to one end of the connecting groove, is configured to abut against the opening of the adsorption groove under the action of the movable plate, thereby connecting the adsorption groove; and A conductor is disposed on the movable plate and is connected to the other end of the connecting groove and an external air source, respectively.

6. The positioning device of claim 5, wherein, The connected body includes: A connecting portion is embedded in the movable plate and communicates with the connecting groove; A sealing part is fitted onto the connecting part and extends out of the upper surface of the connecting part.

7. The positioning device of claim 2, wherein, The lifting component includes: A fixed body is located on the side of the positioning plate opposite to the connecting member and is connected to the lifting member; A support body, spaced apart from the lifting component, is movably inserted through the positioning plate and connected to both the connecting component and the fixing body; and A lifting body is connected to the fixed body, and the lifting body is configured to drive the fixed body to move the lifting component and the support body simultaneously toward the carrier component.

8. The positioning device of claim 1, wherein, The base includes: Two support plates are provided on both sides of the carrier, and the support plates are provided with support grooves near the end of the carrier, the support grooves being configured to accommodate part of the carrier; A base plate is disposed on the side of the lifting member away from the bearing member and is respectively connected to the two support plates. The base plate and the two support plates form a storage space for storing the positioning component.

9. The positioning device of claim 1, wherein, The carrier includes: A base is configured to be placed on the pedestal; A sealing body is disposed on the side of the base opposite to the connecting member; and A support body is disposed on the side of the sealing body opposite to the base and is detachably connected to the base. The support body is used to support the workpiece. The through hole and the adsorption groove both pass through the base, the sealing body and the carrier in sequence.

10. The positioning device of claim 1, wherein, The positioning device further includes: A pressing assembly is disposed on one side of the base and connected to the base, the pressing assembly being configured to press the carrier member against the base.

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