Positioning device

Abstract

A positioning device comprises a positioning seat provided with a plurality of rhombic grooves radially arranged outwards along the center of the positioning seat; the two positioning mechanisms are detachably clamped to the corresponding rhombic grooves of the positioning base, each positioning mechanism comprises a supporting assembly detachably connected with the positioning base, an ejector block slidably connected to the supporting assembly and a locking piece adjustably connected to the supporting assembly, and the side, abutting against the positioning base, of the supporting assembly is provided with a first clamping protrusion matched with the rhombic grooves; the locking piece is connected to the supporting assembly and abuts against the ejector block. And the two fixing blocks are detachably clamped to the corresponding rhombic grooves, and the side, abutting against the positioning base, of each fixing block is provided with a second clamping protrusion matched with the corresponding rhombic groove. According to the positioning device, the workpiece is borne through the positioning base, the multiple positioning mechanisms are clamped in the rhombic groove of the positioning base so as to abut against the periphery of the workpiece, then the ejector block is driven through the locking piece to achieve positioning of the workpiece, the positioning effect is good, the position is adjustable, and applicability is high.

Description

Technical Field

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

[0002] In the field of machining technology, when machining workpieces using lathes, machine tools, and other devices, it is necessary to first position the workpiece. Currently, tools such as vises are commonly used to fix the workpiece, but vises can only position the workpiece in one direction. When multi-directional positioning of the workpiece is required, this cannot be met. A common multi-directional positioning method involves setting fixed blocks on two sides of the workpiece and using cylinders, motors, or other driving components on the other two sides to push the workpiece against the corresponding fixed blocks to achieve positioning. However, this positioning mechanism is costly to manufacture, and it cannot be used to position the workpiece when its volume is larger than the distance between the fixed blocks and the driving components. Utility Model Content

[0003] In view of the above, it is necessary to propose a positioning device that uses a positioning seat to support the workpiece, and multiple positioning mechanisms are engaged with the diamond-shaped grooves of the positioning seat to abut against the periphery of the workpiece. Then, the locking component drives the top block to achieve the positioning of the workpiece. The device has good positioning effect, adjustable position, and strong applicability.

[0004] This application provides a positioning device for positioning a workpiece. The positioning device includes: a positioning base with multiple rhomboid grooves evenly arranged radially outward from the center of the positioning base; and two positioning mechanisms, each detachably engaging with a corresponding rhomboid groove. Each positioning mechanism includes a support assembly detachably connected to the positioning base, a top block slidably connected to the support assembly, and a locking member adjustablely connected to the support assembly. The support assembly has a first engaging protrusion adapted to the rhomboid groove on one side abutting against the positioning base. The support assembly has a sliding groove with an outlet facing the center of the positioning base. The top block is slidably disposed in the sliding groove and extends out of the outlet. The locking member is connected to the support assembly. The workpiece is located on the side away from the center of the positioning seat, and the locking member abuts against the top block; two fixing blocks are detachably snapped into the corresponding diamond-shaped grooves, and each fixing block abutting against the positioning seat on one side is provided with a second snap-fit ​​protrusion adapted to the diamond-shaped groove; wherein, the middle part of the positioning seat carries the workpiece, the two positioning mechanisms are disposed on two adjacent side walls of the workpiece and respectively snapped into the corresponding diamond-shaped grooves through the first snap-fit ​​protrusions, the two fixing blocks are inserted into the diamond-shaped grooves through the second snap-fit ​​protrusions to connect with the positioning seat and correspond to the other two adjacent side walls of the workpiece, and the locking member pushes the top block to push the top block against the corresponding fixing block to position the workpiece.

[0005] The aforementioned positioning device features a positioning base that can support the workpiece. Multiple diamond-shaped grooves arranged sequentially outwards from the center of the positioning base provide multiple selectable installation positions for the positioning mechanism and fixing blocks. The positions of the positioning mechanism and fixing blocks can be flexibly adjusted according to the specific size and shape of the workpiece, thereby achieving precise positioning of workpieces of different specifications. Each positioning mechanism includes a support component, a top block, and a locking component. The support component is detachably engaged with the positioning base via a first engaging protrusion that matches the diamond-shaped groove. The fixing blocks are detachably engaged with the positioning base via a second engaging protrusion that matches the diamond-shaped groove. The connection is stable and easy to install and disassemble, allowing for quick adjustment of position according to actual needs. The two positioning mechanisms are positioned opposite two adjacent sides of the workpiece, and the two fixing blocks are positioned opposite two other adjacent sides of the workpiece. During positioning, the locking component pushes the top block against the workpiece, thereby pushing the workpiece against the corresponding fixing block to position it. Furthermore, when the positioning mechanism applies a force toward the workpiece, the positioning mechanism itself is subjected to a force in the opposite direction of the workpiece, causing the first snap-fit ​​protrusion to abut against the side wall of the diamond groove, and the fixing block is subjected to the pushing force of the workpiece, causing the second snap-fit ​​protrusion to abut against the side wall of the diamond groove, thereby improving the stability of the snap-fit ​​between the positioning mechanism, the fixing block and the positioning seat, and thus further improving the stability of the positioning device in positioning the workpiece.

[0006] In some embodiments, the top block includes a pushing part and a sliding part connected together. The cross-sectional area of ​​the pushing part is larger than the cross-sectional area of ​​the outlet. The pushing part is used to push the workpiece. The sliding part is disposed in the groove and has an upward-opening receiving groove. The positioning mechanism also includes an elastic member disposed in the receiving groove. The two ends of the elastic member abut against the inner wall of the receiving groove away from the pushing part and the inner wall of the support assembly near the pushing part, respectively. The elastic member pushes the sliding part toward the locking member, thereby driving the pushing part toward the support assembly.

[0007] In some embodiments, the support assembly includes a housing connected to the positioning seat and a stop block detachably connected to the housing. The first snap-fit ​​protrusion is disposed on the side of the housing that abuts against the positioning seat. The slide groove is formed in the housing. The stop block is disposed inside the housing and near the outlet. The lower end of the stop block is inserted into the receiving groove. The end of the elastic member near the pushing part abuts against the stop block.

[0008] In some embodiments, the housing has a through hole communicating with the slide groove on the side away from the outlet; the support assembly further includes a connecting block detachably connected to the housing, the connecting block being disposed in the slide groove and close to the through hole, the locking member passing through the through hole and being adjustablely connected to the connecting block, the locking member passing through the connecting block to abut against the sliding portion.

[0009] In some embodiments, the housing has an assembly port communicating with the slide groove on the side opposite to the first snap-fit ​​protrusion; the support assembly further includes a cover plate detachably connected to the housing, the cover plate covering the assembly port.

[0010] In some embodiments, both the first snap-fit ​​protrusion and the second snap-fit ​​protrusion are V-shaped structures, and both the first snap-fit ​​protrusion and the second snap-fit ​​protrusion are adapted to the structure of the corner of the rhomboid groove.

[0011] In some embodiments, each of the rhomboid grooves has a plurality of discharge holes at its bottom, the diameter of which is smaller than the width of the rhomboid groove.

[0012] In some embodiments, the plurality of rhomboid grooves are all similar rhomboids, and the difference between the sides of adjacent rhomboid grooves is the same.

[0013] In some embodiments, the plurality of rhomboid grooves are arranged at equal intervals, and the minimum distance between two adjacent rhomboid grooves is greater than or equal to 2 mm.

[0014] In some embodiments, the angle range of each interior angle of the rhomboid groove is 60° to 120°. 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 The diagram shown is a schematic representation of the positioning device from another angle, excluding the positioning base.

[0017] Figure 3 for Figure 1 The diagram shows an exploded view of the positioning mechanism of the positioning device.

[0018] Figure 4 for Figure 1 The positioning mechanism of the positioning device shown is a cross-sectional view along the IV-IV direction.

[0019] Explanation of main component symbols: Positioning device 100, positioning seat 10, diamond groove 11, discharge hole 12, positioning mechanism 20, support assembly 21, housing 211, first snap-fit ​​protrusion 2111, slide groove 2112, outlet 2113, through hole 2114, assembly port 2115, stop block 212, connecting block 213, top block 22, pushing part 221, sliding part 222, receiving groove 2221, locking part 23, elastic part 24, cover plate 25, fixing block 30, second snap-fit ​​protrusion 31, workpiece 200. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] The following will describe some embodiments of this application in detail with reference to the accompanying drawings.

[0024] Please see Figure 1 This application provides a positioning device 100 for positioning a workpiece 200, the workpiece 200 being a block structure such as a cuboid or cube. The positioning device 100 includes a positioning base 10, two positioning mechanisms 20 detachably engaged with the positioning base 10, and two fixing blocks 30 detachably engaged with the positioning base 10.

[0025] In this embodiment, please refer to Figure 1 The positioning seat 10 has a plate-like structure, which can provide stable support for the workpiece 200.

[0026] The positioning base 10 has multiple rhomboid grooves 11, which are arranged radially outward from the center of the positioning base 10. The number of rhomboid grooves 11 can be nine, ten, eleven, etc., and the specific number can be set according to actual needs, which is not limited here. The multiple rhomboid grooves 11 are all similar rhombuses, and the difference in the sides of adjacent rhomboid grooves 11 is the same. In this embodiment, the interior angles of the multiple rhomboid grooves 11 at the same position are the same. The multiple rhomboid grooves 11 can be arranged at equal intervals, that is, the multiple rhomboid grooves 11 are concentrically arranged in the direction outward from the center of the positioning base 10, and the minimum distance between two adjacent rhomboid grooves 11 is greater than or equal to 2mm.

[0027] Multiple diamond-shaped grooves 11 are evenly spaced to facilitate the calculation of the distance the positioning mechanism 20 moves from one diamond-shaped groove 11 to another when installed on the positioning seat 10, based on the distance between adjacent diamond-shaped grooves 11. The minimum distance between two adjacent diamond-shaped grooves 11 can be 2mm, 5mm, 7mm, 10mm, etc. If the minimum distance between two adjacent diamond-shaped grooves 11 is less than 2mm, the overall structural strength of the positioning seat 10 will decrease. Due to the small spacing between the diamond-shaped grooves 11, the positioning seat 10 is prone to breakage or deformation at the weak points between the diamond-shaped grooves 11 when subjected to the pressure of the positioning mechanism 20 and the workpiece 200, affecting the service life and reliability of the positioning device 100.

[0028] The angle range of each interior angle of the rhomboid groove 11 is 60° to 120°. Please refer to [link / reference]. Figure 1 The angle of one of the interior angles 'a' or 'b' of the rhomboid groove 11 can be 60°, 75°, 90°, 105°, 120°, etc. It can be understood that the sum of two adjacent interior angles is 180°. When the angle of one interior angle 'a' of the rhomboid groove 11 is less than 60°, then the angle of its adjacent interior angle 'b' is greater than 120°. If the angle of interior angle 'a' of the rhomboid groove 11 is less than 60° and the angle of interior angle 'b' is greater than 120°, or vice versa, it will reduce the installation stability of the positioning mechanism 20, making it prone to loosening or falling off under external force, affecting positioning accuracy. It will also make it inconvenient to adjust the position of the positioning mechanism 20, limiting the operating space and restricting the direction of movement, making it difficult to flexibly adjust the position. Furthermore, it will exacerbate stress concentration problems; when the workpiece 200 is subjected to force, the stress concentration at the interior angles is more obvious, easily causing cracks or damage, affecting the structural integrity and service life of the positioning seat 10. When the angles of the inner angles a and b of the rhombus groove 11 are between 60° and 120°, the positioning mechanism 20 is stably installed, can effectively withstand external forces, maintain accurate positioning of the workpiece 200, and the position adjustment of the positioning mechanism 20 is relatively convenient. At the same time, it can also effectively avoid excessive stress concentration, so that the force is transmitted more evenly between the positioning seat 10 and the positioning mechanism 20, reducing the risk of cracks or damage at the inner angles of the rhombus groove 11.

[0029] Each rhomboid groove 11 has multiple discharge holes 12 at its bottom, and the diameter of each discharge hole 12 is smaller than the width of the corresponding rhomboid groove 11. During the positioning of the workpiece 200, if there are debris, dust or other impurities, these discharge holes 12 can discharge the impurities in time, preventing the impurities from accumulating in the rhomboid groove 11 and affecting the installation and use of the positioning mechanism 20, thus ensuring the normal operation of the positioning device 100.

[0030] Please see Figure 1 , Figure 2 and Figure 3 Both positioning mechanisms 20 can be detachably engaged with the corresponding diamond-shaped grooves 11 of the positioning seat 10. Each positioning mechanism 20 includes a support component 21 detachably connected to the positioning seat 10, a top block 22 slidably connected to the support component 21, a locking member 23 adjustablely connected to the support component 21, an elastic member 24 disposed in the support component 21, and a cover plate 25 detachably connected to the support component 21.

[0031] The support assembly 21 includes a housing 211 connected to the positioning seat 10, a stop block 212 detachably connected to the housing 211, and a connecting block 213 detachably connected to the housing 211.

[0032] The lower end of the housing 211 is provided with a first snap-fit ​​protrusion 2111 that is adapted to the diamond groove 11. The housing 211 is provided with a sliding groove 2112, which has an outlet 2113 facing the center of the positioning seat 10.

[0033] The first engaging protrusion 2111 is disposed on the side of the housing 211 that abuts against the positioning seat 10. The first engaging protrusion 2111 has a V-shaped structure and is adapted to the structure of the angle of the rhomboid groove 11. That is, when the inner angle of the rhomboid groove 11 is 60°, the inner angle of the first engaging protrusion 2111 is 60°; when the inner angle of the rhomboid groove 11 is 90°, the inner angle of the first engaging protrusion 2111 is 90°; when the inner angle of the rhomboid groove 11 is 120°, the inner angle of the first engaging protrusion 2111 is 120°, and so on. It can be understood that the rhomboid groove 11 has two types of inner angles, that is, the sum of two adjacent inner angles is 180°, and the first engaging protrusion 2111 has two types of inner angles, the sum of the two types of inner angles of the first engaging protrusion 2111 is 180°, so as to be suitable for the two types of inner angles of the rhomboid groove 11.

[0034] Please see Figure 2 , Figure 3 and Figure 4A groove 2112 is formed in the housing 211. The outlet 2113 of the groove 2112 is located on the side of the housing 211 facing the center of the positioning seat 10. A through hole 2114 communicating with the groove 2112 is provided on the side of the housing 211 away from the outlet 2113. An assembly opening 2115 communicating with the groove 2112 is provided on the side of the housing 211 away from the first snap-fit ​​protrusion 2111. The housing 211 has a cuboid structure. The housing 211 is snapped into the diamond-shaped groove 11 of the positioning seat 10 by the first snap-fit ​​protrusion 2111, and the outlet 2113 of the groove 2112 faces the workpiece 200 located on the positioning seat 10. A stop block 212 is provided inside the housing 211 and near the outlet 2113. The stop block 212 is approximately a T-shaped plate structure. The connecting block 213 is disposed within the slide groove 2112 and near the through hole 2114. The connecting block 213 has a plate-like structure, and its position remains unchanged when it is installed inside the housing 211. The cover plate 25 is disposed on the assembly opening 2115. The cover plate 25 has a plate-like structure, and its placement can seal the assembly opening 2115 of the housing 211.

[0035] The top block 22 is slidably disposed in the slide groove 2112 and extends out of the outlet 2113. The top block 22 includes a pushing part 221 and a sliding part 222 connected together. The cross-sectional area of ​​the pushing part 221 is larger than the cross-sectional area of ​​the outlet 2113. The pushing part 221 is used to push the workpiece 200. The sliding part 222 is disposed in the slide groove 2112 and has an upward-opening receiving groove 2221. The lower end of the stop block 212 is inserted into the receiving groove 2221. The pushing part 221 has a plate-like structure, which can prevent the top block 22 from retracting into the slide groove 2112. The sliding part 222 has a cuboid structure and is slidably connected to the housing 211 along the slide groove 2112.

[0036] The elastic element 24 is disposed within the receiving groove 2221. Both ends of the elastic element 24 abut against the inner wall of the receiving groove 2221 away from the pushing part 221 and the stop block 212, respectively. The elastic element 24 pushes the sliding part 222 towards the locking member 23, thereby causing the pushing part 221 to move towards the support assembly 21. The elastic element 24 can be a spring; by providing the elastic element 24, the top block 22 can be pushed back into the housing 211.

[0037] The locking member 23 is connected to the side of the support assembly 21 away from the center of the positioning seat 10, and the locking member 23 abuts against the top block 22. In this embodiment, the locking member 23 and the connecting block 213 are adjustablely connected, and the through hole 2114 can accommodate the locking member 23. The locking member 23 passes through the connecting block 213 and abuts against the sliding part 222. The locking member 23 is a bolt, and the locking member 23 is threadedly connected to the connecting block 213. When the locking member 23 is rotated to move towards the sliding part 222, the locking member 23 pushes the sliding part 222 towards the workpiece 200, and the sliding part 222 drives the pushing part 221 to hold the workpiece 200 to position the workpiece 200. When the locking member 23 is rotated in the opposite direction to move away from the sliding part 222, the elastic member 24 pushes the sliding part 222 away from the workpiece 200. The sliding part 222 drives the pushing part 221 away from the workpiece 200, thereby releasing the workpiece 200. It can be understood that the locking member 23 is threadedly connected to the connecting block 213. When the locking member 23 drives the top block 22 to hold the workpiece 200, a force is applied between the locking member 23 and the connecting block 213. Therefore, the connecting block 213 is a vulnerable part. Setting the connecting block 213 to be detachably connected to the housing 211 facilitates the replacement of the connecting block 213 and can reduce maintenance costs.

[0038] In this embodiment, please refer to Figure 1 and Figure 2 The positioning device 100 also includes two detachable fixing blocks 30 that are snapped into the diamond-shaped groove 11. Each fixing block 30 abuts against one side of the positioning seat 10 and is provided with a second snap-fit ​​protrusion 31 adapted to the diamond-shaped groove 11. Each fixing block 30 is inserted into the diamond-shaped groove 11 through the second snap-fit ​​protrusion 31 to connect with the positioning seat 10. The two fixing blocks 30 correspond to two adjacent side walls of the workpiece 200. Two positioning mechanisms 20 are provided, each corresponding to the other two side walls of the workpiece 200. Each positioning mechanism 20 pushes the workpiece 200 against the corresponding fixing block 30 to position the workpiece 200. By providing two fixing blocks 30, the use of positioning mechanisms 20 can be reduced, thereby reducing the manufacturing cost of the positioning device 100.

[0039] The fixing block 30 has a block-like structure, and the second engaging protrusion 31 has a V-shaped structure that matches the corner structure of the rhomboid groove 11. Specifically, when the interior angle of the rhomboid groove 11 is 60°, the interior angle of the second engaging protrusion 31 is 60°; when the interior angle of the rhomboid groove 11 is 90°, the interior angle of the second engaging protrusion 31 is 90°; when the interior angle of the rhomboid groove 11 is 120°, the interior angle of the second engaging protrusion 31 is 120°, and so on. It can be understood that the rhomboid groove 11 has two types of interior angles, meaning the sum of two adjacent interior angles is 180°. Similarly, the second engaging protrusion 31 has two types of interior angles, and the sum of the two types of interior angles of the second engaging protrusion 31 is 180°, thus accommodating the two types of interior angles of the rhomboid groove 11.

[0040] When positioning workpiece 200, place workpiece 200 in the center of positioning seat 10, and align the four side walls of workpiece 200 with the four corners of rhomboid groove 11. Then, place two fixing blocks 30 close to two adjacent side walls of workpiece 200 and engage them in the appropriate rhomboid groove 11. Next, use two positioning mechanisms 20, placing them close to the other two side walls of workpiece 200 and engaging them in the appropriate rhomboid groove 11. Then, lock the locking element 23 of each positioning mechanism 20, thereby positioning workpiece 200 through the two fixing blocks 30 and the two positioning mechanisms 20.

[0041] It is understood that the positioning base 10 of the positioning device 100 can be equipped with three positioning mechanisms 20 and one fixing member 30. The three positioning mechanisms 20 correspond to three sides of the workpiece 200, and the fixing member 30 corresponds to the remaining side of the workpiece 200. Then, by adjusting the three positioning mechanisms 20, the workpiece 200 can be positioned in conjunction with the fixing member 30. The positioning base 10 of the positioning device 100 can also be equipped with four positioning mechanisms 20, which correspond to four sides of the workpiece 200. By adjusting the four positioning mechanisms 20, they can cooperate with each other to position the workpiece 200.

[0042] The positioning device 100 provided in this embodiment has a positioning base 10 that can support a workpiece 200. The positioning base 10 has multiple diamond-shaped grooves 11 arranged radially outward from the center, providing multiple selectable installation positions for the positioning mechanism 20 and the fixing block 30. The positions of the positioning mechanism 20 and the fixing block 30 can be flexibly adjusted according to the specific size and shape of the workpiece 200, thereby achieving precise positioning of workpieces 200 of different specifications. Each positioning mechanism 20 includes a support component 21, a top block 22, and a locking component 23. The support component 21 is detachably engaged with the positioning base 10 via a first engaging protrusion 2111 that matches the diamond-shaped groove 11. The fixing block 30 is detachably engaged with the positioning base 10 via a second engaging protrusion 31 that matches the diamond-shaped groove 11. The connection is stable and easy to install and disassemble, allowing for quick adjustment of the position according to actual needs. Two positioning mechanisms 20 are positioned opposite two adjacent sides of the workpiece 200, and two fixing blocks 30 are positioned opposite two other adjacent sides of the workpiece 200. During positioning, the locking member 23 pushes the top block 22 to make the top block 22 abut against the workpiece 200, thereby pushing the workpiece 200 against the corresponding fixing block 30 to position the workpiece 200. Furthermore, when the positioning mechanism 20 applies a force toward the workpiece 200, the positioning mechanism 20 itself is subjected to a force in the opposite direction of the workpiece 200, causing the first engaging protrusion 2111 to abut against the side wall of the diamond groove 11, and the fixing block 30 is subjected to the pushing force of the workpiece 200, causing the second engaging protrusion 31 to abut against the side wall of the diamond groove 11. This improves the stability of the engagement between the positioning mechanism 20, the fixing block 30, and the positioning seat 10, thereby further improving the stability of the positioning device 100 in positioning the workpiece 200.

[0043] The operation of the positioning device 100 provided in this embodiment is roughly as follows:

[0044] First, place the workpiece 200 in the middle of the positioning seat 10, and make the four side walls of the workpiece 200 correspond to the four corners of the rhomboid groove 11 respectively. Then, set the two fixing blocks 30 close to the two adjacent side walls of the workpiece 200, and fix the two fixing blocks 30 in the appropriate rhomboid groove 11 through the second snap-fit ​​protrusion 31.

[0045] Then, two positioning mechanisms 20 are used, and the two positioning mechanisms 20 are set close to the other two side walls of the workpiece 200. The two positioning mechanisms 20 are then engaged in the appropriate diamond-shaped grooves 11 by the first engaging protrusion 2111. Then, the rotating locking member 23 of each positioning mechanism 20 pushes the top block 22 towards the workpiece 200. The top block 22 pushes the workpiece 200 to move to the corresponding fixing block 30, thereby completing the positioning of the workpiece 200.

[0046] When disassembling workpiece 200, loosen the locking part 23, the elastic part 24 pushes the top block 22 away from workpiece 200, thereby releasing workpiece 200, and then the positioning mechanism 20 and the fixing block 30 can be removed.

[0047] 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.

[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 for positioning a workpiece, characterized in that, The positioning device includes: The positioning seat has multiple diamond-shaped grooves that are evenly arranged radially outward from the center of the positioning seat; Two positioning mechanisms are detachably engaged with the corresponding rhomboid grooves. Each positioning mechanism includes a support component detachably connected to the positioning seat, a top block slidably connected to the support component, and a locking member adjustablely connected to the support component. The support component has a first engaging protrusion adapted to the rhomboid groove on one side abutting the positioning seat. The support component has a sliding groove with an outlet facing the center of the positioning seat. The top block is slidably disposed in the sliding groove and extends out of the outlet. The locking member is connected to the side of the support component away from the center of the positioning seat, and abuts against the top block. Both fixing blocks are detachably snapped into the corresponding diamond-shaped grooves. Each fixing block has a second snap-fit ​​protrusion that matches the diamond-shaped groove on one side abutting the positioning seat. The workpiece is supported in the middle of the positioning seat. The two positioning mechanisms are disposed on two adjacent side walls of the workpiece and are respectively engaged with the corresponding diamond-shaped grooves by the first engaging protrusion. The two fixing blocks are inserted into the diamond-shaped grooves by the second engaging protrusion to connect with the positioning seat and correspond to the other two adjacent side walls of the workpiece. The locking member pushes the top block to push the workpiece to the corresponding fixing block to position the workpiece.

2. The positioning device as described in claim 1, characterized in that, The top block includes a pushing part and a sliding part connected to each other. The cross-sectional area of ​​the pushing part is larger than the cross-sectional area of ​​the outlet. The pushing part is used to push the workpiece. The sliding part is disposed in the slide groove and has an upward-opening receiving groove. The positioning mechanism further includes an elastic element disposed in the receiving groove. The two ends of the elastic element abut against the inner wall of the receiving groove away from the pushing part and the inner wall of the support assembly near the pushing part, respectively. The elastic element pushes the sliding part toward the locking part, thereby driving the pushing part toward the support assembly.

3. The positioning device as described in claim 2, characterized in that, The support assembly includes a housing connected to the positioning seat and a stop block detachably connected to the housing. The first snap-fit ​​protrusion is provided on the side of the housing that abuts against the positioning seat. The slide groove is formed in the housing. The stop block is provided inside the housing and is located near the outlet. The lower end of the stop block is inserted into the receiving groove. The end of the elastic member near the pushing part abuts against the stop block.

4. The positioning device as described in claim 3, characterized in that, The side of the housing away from the outlet is provided with a through hole communicating with the slide groove; The support assembly also includes a connecting block that is detachably connected to the housing. The connecting block is disposed in the slide groove and close to the through hole. The locking member passes through the through hole and is adjustablely connected to the connecting block. The locking member passes through the connecting block to abut against the sliding part.

5. The positioning device as described in claim 4, characterized in that, The housing has an assembly port communicating with the slide groove on the side opposite to the first snap-fit ​​protrusion. The support assembly also includes a cover plate detachably connected to the housing, the cover plate being disposed over the assembly opening.

6. The positioning device as described in claim 1, characterized in that, Both the first and second snap-fit ​​protrusions are V-shaped structures, and both the first and second snap-fit ​​protrusions are adapted to the structure of the corners of the rhomboid groove.

7. The positioning device as described in claim 1, characterized in that, Each of the diamond-shaped grooves has multiple discharge holes at its bottom, the diameter of which is smaller than the width of the diamond-shaped groove.

8. The positioning device as described in claim 1, characterized in that, The multiple rhomboid grooves are all similar rhomboids, and the difference between the sides of adjacent rhomboid grooves is the same.

9. The positioning device as described in claim 1, characterized in that, The multiple rhomboid grooves are arranged at equal intervals, and the minimum distance between two adjacent rhomboid grooves is greater than or equal to 2mm.

10. The positioning device as claimed in claim 1, characterized in that, The angle range of each interior angle of the rhomboid groove is 60°~120°.

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