Positioning mechanism

Abstract

The utility model discloses a positioning mechanism, which relates to the field of product assembly and comprises a base assembly, a lifting plate assembly and a plurality of product positioning units. The base assembly comprises a base plate and a plurality of horizontal inclined wedge blocks. The lifting plate assembly comprises a lifting plate which can move up and down relative to the base plate. The product positioning unit comprises a product placing jig, a plurality of limiting blocks and a plurality of positioning assemblies, the limiting blocks correspond to the positioning assemblies one to one, the edges, close to the product placing jig, of the limiting blocks are provided with the positioning assemblies arranged on the lifting plate, and the edges, close to the product placing jig, of the limiting blocks are arranged opposite to the corresponding limiting blocks. When the lifting plate moves up and down, the positioning assemblies and the horizontal wedge blocks extrude each other, so that the positioning assemblies are close to or away from the corresponding limiting blocks. By means of the design, accurate clamping and positioning of the product on the placing jig are guaranteed, stability and precision of product positioning are improved, and the requirement for high-precision production is met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of product assembly, and in particular to a positioning mechanism. BACKGROUND

[0002] With the rapid development of computers, communications and consumer electronics, the production of electronic products is constantly advancing towards high speed and high precision. In the assembly and welding process of electronic components, the positioning accuracy of square cover plate products directly affects the welding quality and product performance. The traditional positioning method requires the operator to manually place the product at the specified position, adjust the posture and ensure its stability, which is time-consuming and labor-intensive. Long-term repetitive operation can easily cause the operator to be tired, which not only reduces the work efficiency, but also increases the risk of misoperation, and is difficult to meet the efficiency requirements of large-scale production. Due to the influence of human factors, manual positioning is prone to deviation, such as position shift and angle error, which leads to unstable welding quality and affects the consistency and reliability of the product. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a positioning mechanism capable of automatically adjusting the angular position of the product and keeping it stable.

[0004] The positioning mechanism according to the embodiments of the present application comprises a base assembly, a lifting plate assembly and a plurality of product positioning units. The base assembly comprises a base plate and a plurality of horizontal inclined wedge blocks, each of which is arranged on the upper surface of the base plate; the lifting plate assembly comprises a lifting plate, which is movably connected with the base plate and can move up and down relative to the base plate; the product positioning unit comprises a product placement jig, a plurality of limiting blocks and a plurality of positioning assemblies, the product placement jig is arranged on the upper surface of the lifting plate, the limiting blocks and the positioning assemblies are one-to-one corresponding, the limiting blocks are arranged on the upper surface of the lifting plate close to the edges of the product placement jig, and different limiting blocks are arranged close to different edges of the product placement jig, the positioning assemblies are arranged on the lifting plate and are arranged opposite to the corresponding limiting blocks close to the edges of the product placement jig, when the lifting plate moves up and down, the positioning assemblies are extruded by the horizontal inclined wedge blocks, so that the positioning assemblies are close to or away from the corresponding limiting blocks.

[0005] According to the positioning mechanism of the embodiments of the present application, at least the following advantages are achieved: by setting the base assembly, the lifting plate assembly and the plurality of product positioning units, the automatic and high-precision positioning of the product is achieved by ingeniously using the mechanical structure. When the lifting plate moves up and down, the positioning assembly and the horizontal inclined wedge block are extruded with each other, so that the positioning assembly is close to or away from the corresponding limiting block. This design ensures the accurate clamping and positioning of the product on the fixture, improves the stability and precision of the product positioning, and meets the demand of high-precision production. The clamping and release of the positioning assembly can be controlled by the up and down movement of the lifting plate, without manual intervention, which simplifies the operation process. The mechanism is suitable for automatic production line, which significantly improves the production efficiency and reduces the labor cost. The structure of each component of the positioning mechanism is reasonable, and the movement parts are mainly extruded by the inclined wedge block, which reduces the complex transmission mechanism, reduces the equipment failure rate, and improves the reliability and service life of the equipment. The limiting block and the positioning assembly in the product positioning unit can be adjusted according to the size and shape of different products, which has good adaptability and is suitable for positioning of products of various specifications.

[0006] According to some embodiments of the present application, the positioning assembly comprises a first linear guide rail, a horizontal movable plate, a positioning push block and a compression spring, the first linear guide rail is arranged on the lifting plate in a direction pointing to the corresponding limiting block, the horizontal movable plate is movably connected with the first linear guide rail through a sliding block, the positioning push block is connected with the movable plate, one end of the compression spring is connected with the horizontal movable plate, the compression spring is used to make the edge of the horizontal movable plate abut against the horizontal inclined wedge block, the horizontal inclined wedge block corresponds to the horizontal movable plate one by one, when the lifting plate moves up and down, the horizontal movable plate and the horizontal inclined wedge block are extruded, so that the horizontal movable plate moves in the direction of the corresponding limiting block.

[0007] According to some embodiments of the present application, the positioning assembly further comprises a buffer spring and a buffer guide column, the horizontal movable plate is further provided with a protrusion, one end of the buffer guide column is connected with the positioning push block, the other end is movably arranged on the protrusion, the buffer spring is arranged around the buffer guide column, and the two ends of the buffer spring abut against the protrusion and the positioning push block respectively.

[0008] According to some embodiments of the present application, the horizontal movable plate is provided with a first wedge surface at the position in contact with the horizontal inclined wedge block, and the first wedge surface abuts against the horizontal inclined wedge block.

[0009] According to some embodiments of the present application, a wedge-shaped bottom plate displacement assembly is further included, the lifting plate assembly further comprises a plurality of wedge-shaped top blocks, the wedge-shaped top blocks are connected with the lower surface of the lifting plate, the wedge-shaped bottom plate displacement assembly is movably connected with the wedge-shaped top blocks, and is used to drive the lifting plate assembly to move up and down.

[0010] According to some embodiments of the present application, the wedge-shaped base plate displacement assembly comprises a wedge-shaped base plate, a second linear guide rail and a driving member, the wedge-shaped base plate is slidably connected with the second linear guide rail through a sliding block, the driving end of the driving member is connected with the wedge-shaped base plate, the wedge-shaped base plate is provided with a plurality of second wedge-shaped surfaces, the second wedge-shaped surfaces correspond to the wedge-shaped top blocks one by one, the wedge-shaped top blocks abut against the second wedge-shaped surfaces, when the wedge-shaped base plate moves horizontally, the second wedge-shaped surfaces extrude the wedge-shaped top blocks, so that the wedge-shaped top blocks move upward, thereby driving the lifting plate to move upward.

[0011] According to some embodiments of the present application, a plurality of guide columns are arranged on the base plate, one end of the guide column is connected with the base plate, and the guide column is slidably arranged in the lifting plate.

[0012] According to some embodiments of the present application, one product positioning unit comprises two positioning assemblies and a plurality of limiting blocks, each positioning assembly corresponds to at least one limiting block, the two positioning assemblies are arranged on the two adjacent sides of the product placing jig respectively, and the plurality of limiting blocks are arranged on the opposite sides of the product placing jig corresponding to the positioning assemblies.

[0013] According to some embodiments of the present application, two product positioning units are arranged, the two product positioning units are arranged side by side, and the positioning assemblies are arranged close to the edge of the lifting plate. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in combination with the drawings and embodiments, in which:

[0015] Figure 1 FIG. 1 is a structural schematic view of a positioning mechanism according to an embodiment of the present application;

[0016] Figure 2 FIG. 2 is a structural schematic view of a base assembly according to an embodiment of the present application;

[0017] Figure 3 FIG. 3 is a structural schematic view of a lifting plate assembly according to an embodiment of the present application;

[0018] Figure 4 FIG. 4 is a structural schematic view of a positioning assembly according to an embodiment of the present application;

[0019] Figure 5 FIG. 5 is a structural schematic view of a wedge-shaped base plate displacement assembly according to an embodiment of the present application.

[0020] Reference signs: base assembly 100; base plate 110; horizontal wedge block 120; guide column 130; lifting assembly 200; lifting plate 210; product placement jig 220; limiting block 230; wedge-shaped top block 240; positioning assembly 300; first linear guide rail 310; horizontal movable plate 320; first wedge-shaped surface 321; protrusion 322; positioning push block 330; compression spring 340; buffer spring 350; buffer guide column 360; wedge-shaped bottom plate displacement assembly 400; wedge-shaped bottom plate 410; second wedge-shaped surface 411; second linear guide rail 420; driving member 430. DETAILED DESCRIPTION

[0021] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout. The embodiments described below are exemplary and are for the purpose of explaining the present application only, and should not be understood as limiting the present application.

[0022] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In the description of the present application, if the meaning of several is more than one, the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, above, below, etc. are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0024] In the description of the present application, unless otherwise explicitly limited, the words such as setting, mounting, connecting, etc. should be understood in a broad sense, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0025] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] As shown in Figures 1 to 3 The positioning mechanism of the embodiment of the application comprises a base assembly 100, a lifting plate assembly 200 and a plurality of product positioning units. The base assembly 100 comprises a base plate 110 and a plurality of horizontal inclined wedge blocks 120. The base plate 110 is a basic support component of the entire positioning mechanism, used for mounting and fixing other assemblies. The plurality of horizontal inclined wedge blocks 120 are arranged on the upper surface of the base plate 110 and fixed at predetermined positions. Each horizontal inclined wedge block 120 has an inclined wedge surface for cooperating with the positioning assembly 300 described later to realize the positioning function. The lifting plate assembly 200 comprises a lifting plate 210. The lifting plate 210 is movably connected with the base plate 110 and can move up and down relative to the base plate 110. The upper surface of the lifting plate 210 is used for mounting the product positioning units. It can be understood that the lifting movement of the lifting plate 210 can be controlled by a driving device (such as a pneumatic cylinder, a servo motor, etc.) to realize the opening and closing operation of the positioning assembly 300. The product positioning unit comprises a product placement jig 220, a plurality of limiting blocks 230 and a plurality of positioning assemblies 300. The product placement jig 220 is fixedly mounted on the upper surface of the lifting plate 210 and is used for placing the product (such as a square cover) to be positioned. The product placement jig 220 is designed according to the shape and size of the product to ensure stable placement of the product. The plurality of limiting blocks 230 are arranged on the upper surface of the lifting plate 210 and close to the edges of the product placement jig 220. Different limiting blocks 230 are arranged close to different edges of the product placement jig 220. Each limiting block 230 is used for limiting the movement of the product in a certain direction. The positioning assembly 300 is arranged on the lifting plate 210 and located close to the edge of the product placement jig 220 and is arranged opposite to the corresponding limiting block 230. It can be understood that the positioning assembly 300 comprises a movable pushing component for moving up and down on the lifting plate 210 to cooperate with the horizontal inclined wedge block 120 to realize clamping and releasing of the product.

[0027] For example, the product to be processed is placed on the product placement jig 220. The lifting plate 210 is controlled to rise by the driving device. During the rising process of the lifting plate 210, the positioning assembly 300 contacts and is extruded by the inclined surface of the horizontal inclined wedge block 120 and moves in the horizontal direction to the limiting block 230, and finally pushes the product to the position abutting against the corresponding limiting block 230. The positioning assembly 300 moves to the limiting block 230 and cooperates with the limiting block 230 to clamp and fix the edge of the product, completing the positioning of the product. After the product is accurately positioned, subsequent processing operations such as welding and assembly are performed. After the processing is completed, the lifting plate 210 is controlled to descend. With the descent of the lifting plate 210, the contact force of the positioning assembly 300 with the horizontal inclined wedge block 120 decreases. Under the action of the elastic element, the positioning assembly 300 moves away from the limiting block 230 to release the clamping of the product. After the clamping is released, the processed product can be conveniently taken out to prepare for the next work cycle.

[0028] The positioning mechanism of the embodiment achieves automatic and high-precision positioning of products by ingeniously utilizing mechanical structures through the setting of the base assembly 100, the lifting plate 210 assembly, and several product positioning units. When the lifting plate 210 moves up and down, the positioning assembly 300 is pressed against the horizontal wedge block 120, causing the positioning assembly 300 to move closer to or away from the corresponding limit block 230. This design ensures accurate clamping and positioning of products on the placement jig, improves the stability and precision of product positioning, and meets the needs of high-precision production. The clamping and release of the positioning assembly 300 can be controlled through the up-and-down movement of the lifting plate 210, without the need for manual intervention, simplifying the operation process. The mechanism is suitable for automated production lines, significantly improving production efficiency and reducing labor costs. The components of the positioning mechanism are designed reasonably, and the movement parts are mainly achieved through the extrusion of the horizontal wedge block 120, reducing complex transmission mechanisms, reducing equipment failure rates, and improving the reliability and service life of the equipment. The limit block 230 and the positioning assembly 300 in the product positioning unit can be adjusted according to the size and shape of different products, have good adaptability, and are suitable for product positioning needs of various specifications.

[0029] As shown in Figure 4 some embodiments, the positioning assembly 300 includes a first linear guide rail 310, a horizontal movable plate 320, a positioning push block 330, and a compression spring 340. The first linear guide rail 310 is installed on the lifting plate 210 in a direction pointing to the corresponding limit block 230, and the installation direction of the first linear guide rail 310 is consistent with the product positioning direction, ensuring that the horizontal movable plate 320 can move smoothly and accurately along the direction of the first linear guide rail 310. The horizontal movable plate 320 is slidably connected to the first linear guide rail 310 through a sliding block and can move freely in the guide rail direction. One end of the horizontal movable plate 320 is provided with a first wedge surface 321 that abuts against the horizontal wedge block 120, and the other end is connected to the positioning push block 330. The sliding of the horizontal movable plate 320 realizes the opening and closing actions of the positioning assembly 300. The positioning push block 330 is fixedly connected to one end of the horizontal movable plate 320 and faces the product placement jig 220. When the horizontal movable plate 320 moves along the guide rail, the positioning push block 330 moves with it and directly contacts and pushes the product, making it tightly adhere to the corresponding limit block 230, achieving accurate positioning of the product. One end of the compression spring 340 is connected to the horizontal movable plate 320, and the other end is fixed to the lifting plate 210. The compression spring 340 provides a continuous spring force, causing the first wedge surface 321 of the horizontal movable plate 320 to always abut against the horizontal wedge block 120. During the up-and-down movement of the lifting plate 210, the compression spring 340 ensures that the horizontal movable plate 320 can be reset in time or cooperate with the wedge block action.

[0030] Further, as shown in Figure 4As shown, the positioning assembly 300 further comprises a buffer spring 350 and a buffer guide column 360. One end of the buffer guide column 360 is connected with the positioning push block 330, and the other end is movably arranged in the protrusion 322 on the horizontal movable plate 320, and the buffer guide column 360 is freely slidable along its axial direction to provide guidance and support for the positioning push block 330. The buffer spring 350 is arranged around the buffer guide column 360 between the protrusion 322 and the positioning push block 330, and the two ends of the buffer spring 350 are respectively abutted with the protrusion 322 and the positioning push block 330. When the positioning push block 330 is subjected to an external force, the buffer spring 350 can provide elastic buffering to absorb the impact force and prevent damage to the product or mechanism.

[0031] As can be understood, Figure 4 As shown, the horizontal movable plate 320 is provided with a first wedge surface 321 at the position in contact with the horizontal wedge block 120, and the first wedge surface 321 is abutted with the wedge surface of the horizontal wedge block 120. The first wedge surface 321 is arranged on the side of the horizontal movable plate 320 close to the horizontal wedge block 120, and the wedge surface is processed according to the matching angle with the wedge surface of the horizontal wedge block 120 to ensure that the two can be closely fitted. When the lifting plate 210 rises, the horizontal wedge block 120 remains fixed, and the horizontal movable plate 320 moves upward together with the lifting plate 210. Since the first wedge surface 321 on the horizontal movable plate 320 is in contact with the wedge surface of the horizontal wedge block 120, during the rising of the lifting plate 210, the horizontal component force is generated by the mutual extrusion between the wedge surfaces, which forces the horizontal movable plate 320 to move along the first linear guide rail 310 towards the limiting block 230. When the lifting plate 210 descends, the wedge surfaces gradually separate, and the horizontal movable plate 320 moves along the first linear guide rail 310 in the opposite direction due to the action of the compression spring 340, away from the limiting block 230, and returns to the initial position. By using the mechanical principle of the wedge surface, the vertical movement of the lifting plate 210 is effectively converted into the linear movement of the horizontal movable plate 320, and the transmission is stable and efficient.

[0032] As shown, Figure 1 , Figure 3 and Figure 5As shown, in some embodiments, the embodiment positioning mechanism further comprises a wedge-shaped bottom plate displacement assembly 400, a plurality of wedge-shaped top blocks 240 are connected to the lower surface of the lifting plate 210, and the wedge-shaped top blocks 240 are movably connected with the wedge-shaped bottom plate displacement assembly 400. The wedge-shaped bottom plate displacement assembly 400 is used to drive the lifting plate 210 to move up and down. The wedge-shaped bottom plate 410 is provided with a plurality of second wedge-shaped surfaces 411, which correspond one-to-one with the wedge-shaped top blocks 240 below the lifting plate 210. When the driving member 430 is started, the wedge-shaped bottom plate 410 moves horizontally on the second linear guide rail 420, and the second wedge-shaped surface 411 and the lower surface of the wedge-shaped top block 240 are extruded with each other. Due to the horizontal movement of the wedge-shaped bottom plate 410, the horizontal movement is converted into the vertical movement of the wedge-shaped top block 240 by the interaction of the wedge-shaped surfaces, so as to drive the lifting plate 210 to move up and down. The horizontal movement is converted into the vertical movement by the wedge-shaped surface cooperation between the wedge-shaped bottom plate 410 and the wedge-shaped top block 240, the transmission is stable, the efficiency is high, and at the same time, the wedge-shaped bottom plate displacement assembly 400 and the lifting plate 210 are designed to be compact and occupy small space, which is convenient for integration on the automatic production line.

[0033] As shown, Figure 2 In some embodiments, the base assembly 100 of the embodiment positioning mechanism is provided with a plurality of guide columns 130. One end of the guide column 130 is fixedly connected to the base plate 110 of the base assembly 100, and the other end penetrates through the corresponding guide hole of the lifting plate 210 in the lifting plate 210 assembly and is slidably arranged in the lifting plate 210. In the running process of the positioning mechanism, the lifting plate 210 moves up and down in the vertical direction under the action of the driving device (such as the wedge-shaped bottom plate displacement assembly 400), and the guide column 130 provides accurate guidance for the vertical movement of the lifting plate 210, prevents the lifting plate 210 from tilting, shaking or deviating during lifting, and ensures the positioning accuracy.

[0034] It can be understood that for products with more complex shapes or more precise positioning of products, more positioning assemblies 300 can be selected in one product positioning unit, and more limiting blocks 230 can be correspondingly arranged. As shown in Figure 1 and Figure 3 As shown, taking two positioning assemblies 300 included in one product positioning unit as an example, the two positioning assemblies 300 are respectively located on the adjacent two side edges of the product placement jig 220, forming an L-shaped layout, which can clamp and position the product from two mutually perpendicular directions.

[0035] It can be understood that a plurality of product positioning units can be arranged on the lifting plate 210, and different product units share one wedge-shaped bottom plate displacement assembly 400 as a drive, so that the whole embodiment positioning mechanism is more efficient and has a compact structure. As shown in Figure 1 and Figure 3As shown, taking the number of product positioning units as 2 for example, two product positioning units are arranged side by side on the lifting plate 210, and the positioning assemblies 300 of the two product positioning units are arranged close to the edge of the lifting plate 210, that is, the positioning assembly 300 of one product positioning unit is arranged away from the other product positioning unit. By arranging two product positioning units side by side, the device can process two products at the same time, significantly improving the production efficiency and meeting the needs of batch production. At the same time, the positioning assembly 300 is arranged close to the edge of the lifting plate, so that the processing and assembly of the positioning mechanism of the embodiment are more convenient.

[0036] The above describes the embodiments of the present application in detail in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled in the art without departing from the purpose of the present application. In addition, the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

Claims

1. A positioning mechanism, characterized by, The utility model relates to a product positioning device, including: A base assembly (100) comprising a base plate (110) and a plurality of horizontal inclined wedge blocks (120), each of the horizontal inclined wedge blocks (120) is arranged on the upper surface of the base plate (110); A lifting plate assembly (200) comprising a lifting plate (210), the lifting plate (210) is movably connected with the base plate (110), and the lifting plate (210) can move up and down relative to the base plate (110); A plurality of product positioning units, the product positioning unit comprises a product placement jig (220), a plurality of limiting blocks (230) and a plurality of positioning assemblies (300), the product placement jig (220) is arranged on the upper surface of the lifting plate (210), the limiting block (230) and the positioning assembly (300) are one-to-one correspondence, the limiting block (230) is arranged on the upper surface of the lifting plate (210) close to the edge of the product placement jig (220), and different limiting blocks (230) are arranged close to different edges of the product placement jig (220), the positioning assembly (300) is arranged on the lifting plate (210) and is arranged opposite to the corresponding limiting block (230) close to the edge of the product placement jig (220), when the lifting plate (210) moves up and down, the positioning assembly (300) is extruded with the horizontal inclined wedge block (120), so that the positioning assembly (300) is close to or away from the corresponding limiting block (230).

2. The positioning mechanism of claim 1, wherein: The positioning assembly (300) comprises a first linear guide rail (310), a horizontal movable plate (320), a positioning push block (330) and a compression spring (340), the first linear guide rail (310) is arranged on the lifting plate (210) in the direction pointing to the corresponding limiting block (230), the horizontal movable plate (320) is movably connected with the first linear guide rail (310) through a sliding block, the positioning push block (330) is connected with the movable plate, one end of the compression spring (340) is connected with the horizontal movable plate (320), the compression spring (340) is used for making the edge of the horizontal movable plate (320) abut against the horizontal inclined wedge block (120), the horizontal inclined wedge block (120) and the horizontal movable plate (320) are one-to-one correspondence, when the lifting plate (210) moves up and down, the horizontal movable plate (320) is extruded with the horizontal inclined wedge block (120), so that the horizontal movable plate (320) moves to the direction of the corresponding limiting block (230).

3. The positioning mechanism of claim 2, wherein: The positioning assembly (300) further comprises a buffer spring (350) and a buffer guide column (360), the horizontal movable plate (320) is further provided with a protrusion (322), one end of the buffer guide column (360) is connected with the positioning push block (330), the other end is movably arranged on the protrusion (322), the buffer spring (350) is arranged around the buffer guide column (360), and the two ends of the buffer spring (350) are respectively abutted with the protrusion (322) and the positioning push block (330).

4. The positioning mechanism of claim 2, wherein: The horizontal movable plate (320) is provided with a first wedge surface (321) at the position in contact with the horizontal inclined wedge block (120), and the first wedge surface (321) is in abutment with the horizontal inclined wedge block (120).

5. The positioning mechanism of claim 1, wherein: Further comprising a wedge-shaped bottom plate displacement assembly (400), the lifting plate (210) assembly further comprises a plurality of wedge-shaped top blocks (240), the wedge-shaped top blocks (240) are connected with the lower surface of the lifting plate (210), the wedge-shaped bottom plate displacement assembly (400) is movably connected with the wedge-shaped top blocks (240), and is used for driving the lifting plate (210) assembly to move up and down.

6. The positioning mechanism of claim 5, wherein: The wedge-shaped bottom plate displacement assembly (400) comprises a wedge-shaped bottom plate (410), a second linear guide rail (420) and a driving member (430), the wedge-shaped bottom plate (410) is slidably connected with the second linear guide rail (420) through a sliding block, a driving end of the driving member (430) is connected with the wedge-shaped bottom plate (410), the wedge-shaped bottom plate (410) is provided with a plurality of second wedge surfaces (411), the second wedge surfaces (411) correspond to the wedge-shaped top blocks (240) one by one, the wedge-shaped top blocks (240) are in abutment with the second wedge surfaces (411), when the wedge-shaped bottom plate (410) moves horizontally, the second wedge surfaces (411) press the wedge-shaped top blocks (240), so that the wedge-shaped top blocks (240) move upward, thereby driving the lifting plate (210) to move upward.

7. The positioning mechanism of claim 1, wherein: The base plate (110) is provided with a plurality of guide columns (130), one end of the guide column (130) is connected with the base plate (110), and the guide column (130) is slidably arranged in the lifting plate (210).

8. The positioning mechanism according to any one of claims 1 to 7, characterized in that: One product positioning unit comprises two positioning assemblies and a plurality of limiting blocks, each positioning assembly corresponds to at least one limiting block, two positioning assemblies (300) are arranged on the two adjacent sides of the product placing jig (220) respectively, and a plurality of limiting blocks are arranged on the opposite sides of the product placing jig corresponding to the positioning assemblies.

9. The positioning mechanism of claim 8, wherein: The product positioning unit is provided with two product positioning units arranged side by side, and the positioning assemblies (300) are arranged close to the edges of the lifting plate (210).

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