Positioning device for screwing and production line

Abstract

The application provides a positioning device for screw mounting and demounting and a production line, and belongs to the field of screw positioning, comprising an elastic positioning part, specifically comprising a first elastic positioning head and a second elastic positioning head, the elastic extension directions of the first elastic positioning head and the second elastic positioning head are both parallel to a first horizontal direction, and the first elastic positioning head and the second elastic positioning head are both configured to have elastic forces that are close to each other, a positioning space for positioning a screw is formed between the first elastic positioning head and the second elastic positioning head, the positioning space is sequentially divided into a first material guiding cavity, a positioning cavity and a second material guiding cavity from top to bottom, the cavity diameter of the first material guiding cavity gradually decreases from top to bottom, the cavity diameter of the second material guiding cavity gradually increases from top to bottom, and the positioning cavity is in clearance fit with the screw to be positioned. The positioning device for screw mounting and demounting provided by the application solves the technical problem of low efficiency of the existing Kovar frame mounting and demounting through the setting of the corresponding positioning device.

Description

Technical Field

[0001] This invention belongs to the field of machining, and more specifically, relates to a positioning device for screw loading and unloading. This invention also relates to a production line equipped with the aforementioned positioning device for screw loading and unloading. Background Technology

[0002] There is a large quantity of relatively small (10cm*10cm) Kovar frames (a frame structure made of Kovar alloy, which has a coefficient of linear expansion similar to hard glass in the temperature range of 20-450℃, allowing for effective sealing and matching with corresponding hard glass, and also has a high Curie point and good low-temperature structural stability. The alloy has a dense oxide film, is easy to weld and fuse, has good plasticity, and can be machined. It is widely used in the manufacture of vacuum components, transmitting tubes, picture tubes, switching tubes, transistors, as well as sealed plugs and relay housings, etc. Because Kovar alloy contains cobalt, the products are relatively wear-resistant.) need to be processed in large quantities. In the existing processing method, the Kovar frames to be processed are placed on a tray and then fixed with screws. During the processing, hundreds of parts are processed on one tray, requiring many times more screws than the two parts mentioned above, and the screws need to be installed and removed thousands of times to load and unload the parts. Furthermore, due to the thinness of the parts, the screws are naturally tilted after being placed into the fixing holes one by one. During the assembly process, the screws must first be manually turned a few turns to make them vertical before the power tools can be used to align and tighten them, which increases the difficulty of assembling the parts.

[0003] After machining, the screws also need to be removed one by one during the unloading process, and then gathered together. This process is repeated, and the time spent loading and unloading parts is too long, which has a significant negative impact on the machining efficiency and urgently needs improvement. Summary of the Invention

[0004] The purpose of this invention is to provide a positioning device for screw loading and unloading, so as to solve the technical problem of low loading and unloading efficiency of existing Kovar frames.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a positioning device for screw loading and unloading, comprising:

[0006] The elastic positioning part includes a first elastic positioning head and a second elastic positioning head. The elastic extension and contraction directions of the first elastic positioning head and the second elastic positioning head are both parallel to a first horizontal direction. The first elastic positioning head and the second elastic positioning head are both configured to have an elastic force that brings them closer together. A positioning space for a positioning screw is formed between the first elastic positioning head and the second elastic positioning head. The positioning space is divided into a first material guiding cavity, a positioning cavity, and a second material guiding cavity from top to bottom. The diameter of the first material guiding cavity gradually decreases from top to bottom, and the diameter of the second material guiding cavity gradually increases from top to bottom. The positioning cavity is clearance-fitted with the screw to be positioned.

[0007] Furthermore, the elastic positioning part also includes a first spring and a second spring that both extend along a first horizontal direction. The first spring is used to support the first elastic positioning head and is configured to have a preload force that causes the first elastic positioning head to press against the second elastic positioning head. The second spring is used to support the second elastic positioning head and is configured to have a preload force that causes the second elastic positioning head to press against the first elastic positioning head.

[0008] Furthermore, the screw mounting and dismounting positioning device also includes a first positioning plate and a second positioning plate. The first positioning plate has a first receiving groove, the length direction of which is parallel to the first horizontal direction. The first spring, the first elastic positioning head, the second elastic positioning head, and the second spring are sequentially arranged in the first receiving groove along the first horizontal direction. A first positioning through hole is formed in the middle of the first receiving groove, the depth direction of which is parallel to the vertical direction. The second positioning plate is stacked on the upper surface of the first positioning plate. The first elastic positioning head and the second elastic positioning head are slidably disposed between the first positioning plate and the second positioning plate. The second positioning plate has a second positioning through hole with the depth direction parallel to the vertical direction, and the second positioning through hole and the first positioning through hole are coaxially arranged.

[0009] Furthermore, a first mounting rod is provided on the side of the first elastic positioning head away from the second elastic positioning head, one end of the first spring is sleeved on the first mounting rod, and the other end abuts against the inner wall of the first receiving groove. A second mounting rod is provided on the side of the second elastic positioning head away from the first elastic positioning head, one end of the second spring is sleeved on the second mounting rod, and the other end abuts against the inner wall of the first receiving groove.

[0010] Furthermore, the screw-loading and unloading positioning device also includes a screwdriver, which has a first degree of freedom to move along a first horizontal direction, a second degree of freedom to move along a second horizontal direction, and a third degree of freedom to move along a vertical direction. The second horizontal direction is perpendicular to the first horizontal direction, and the screwdriver tip can be magnetically adapted to the screw.

[0011] Furthermore, the upper surface of the first positioning plate is provided with a plurality of screw holes, each of which is evenly distributed on the edge of the first positioning plate, and the second positioning plate is fixed to the first positioning plate by bolts and screws into the screw holes.

[0012] Furthermore, the sidewall of the first receiving groove is provided with a first guide groove extending along a first horizontal direction, and the outer walls of the first elastic positioning head and the second elastic positioning head are both provided with a first slider. The first slider is slidably adapted to the first guide groove, and the vertical width of the first guide groove and the first slider gradually increases along a second horizontal direction away from the positioning space.

[0013] Furthermore, the bottom wall of the first receiving groove is provided with a second guide groove extending along the first horizontal direction, and the bottom of the first elastic positioning head and the second elastic positioning head are both provided with a second slider. The second slider slides and adapts to the second guide groove. From top to bottom, the horizontal width of the second guide groove and the second slider gradually increases.

[0014] Furthermore, along the first horizontal direction, annular grooves are provided on the two opposite inner sidewalls of the first receiving groove, and the two annular grooves are respectively used to install the first spring and the second spring.

[0015] Compared with the prior art, the advantages of the screw mounting and dismounting positioning device provided by the present invention are as follows:

[0016] During screw assembly, as the screw is inserted downwards, the first guide cavity is initially opened by the screw. During this process, the inclined surfaces formed by the first and second elastic positioning heads guide the movement of the screw, achieving a centering effect. After the main body of the screw enters the positioning cavity, the cylindrical positioning cavity formed between the first and second elastic positioning heads positions the screw, facilitating alignment of the screw with the screw hole. Then, by tightening the screw, it can be screwed into the screw hole. In the initial stage of screwing into the screw hole, due to the short engagement depth, the existing screw... The screw is prone to displacement during the process due to lack of proper positioning, resulting in misalignment between the screw and the screw hole. To address this, the present invention utilizes a first guide cavity to provide an upward force along the screw axis to the top of the screw. Since the screw has already been partially screwed into the screw hole, and due to the self-locking characteristic of the screw connection, the force generated by the first guide cavity on the screw in the present invention will not cause the screw to loosen from the screw hole. Instead, it can keep the screw in a neutral position during the screwing process, thus solving the technical problem that existing screws are prone to displacement in the initial stage of screwing into the screw hole due to the short screw depth.

[0017] Once the screw has reached a certain engagement depth, the connection between the screw and the screw hole is relatively secure. After the nut at the top of the screw enters the second guide cavity through the positioning cavity, the present invention can also determine the engagement depth of the screw by judging the gap between the first elastic positioning head and the second elastic positioning head, so as to play a visual aid role in the screw assembly process, thereby solving the technical problem that the existing torque wrench can only judge whether the screw is tightened by torque.

[0018] When disassembling screws, the first guide cavity facilitates the alignment of the screwdriver with the screw. After the screw head passes through the first guide cavity, the first guide cavity assists in the disassembly of the screw. After the screw is released from the screw hole, the first guide cavity can be used to lift the screw out, suspending it in the air. After the screw is suspended, the top of the screw head can be held in place by the first and second elastic positioning heads to prevent the screw from falling. Furthermore, due to the clearance fit between the lower part of the screw and the positioning head, after all the screws have been removed from the screw hole, the screw loading and unloading positioning device can be flipped over to tilt all the screws to the designated position, preventing the screws from being lost.

[0019] Another object of the present invention is to provide a production line including the screw loading and unloading positioning device described above.

[0020] Compared with the prior art, the production line of the present invention has all the advantages of the aforementioned positioning equipment for screw loading and unloading, which will not be elaborated here. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings:

[0022] Figure 1 A partial structural schematic diagram of the screw mounting and dismounting positioning device provided by the present invention;

[0023] Figure 2 A cross-sectional schematic diagram of the elastic positioning part provided by the present invention;

[0024] Figure 3 This is a schematic diagram illustrating the connection relationship between the first elastic positioning head and the first positioning plate provided by the present invention.

[0025] In the picture:

[0026] 1. Elastic positioning part; 11. First elastic positioning head; 111. First mounting rod; 12. Second elastic positioning head; 121. Second mounting rod; 13. Positioning space; 131. First guide cavity; 132. Second guide cavity; 133. Positioning cavity; 14. First spring; 15. Second spring; 16. First slider; 17. Second slider;

[0027] 2. First positioning plate; 21. First receiving groove; 211. First guide groove; 212. Second guide groove; 213. Annular groove; 22. First positioning through hole;

[0028] 3. Second positioning plate; 31. Second positioning through hole;

[0029] 4. Screws. Detailed Implementation

[0030] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0031] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "back" appear, indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this invention 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 invention.

[0032] Furthermore, in the description of this invention, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention in light of the specific circumstances.

[0033] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0034] Please refer to the following: Figures 1 to 3 The positioning device for screw loading and unloading provided by the present invention will now be described. This positioning device includes an elastic positioning part 1, comprising a first elastic positioning head 11 and a second elastic positioning head 12. The elastic extension and contraction directions of the first elastic positioning head 11 and the second elastic positioning head 12 are both parallel to a first horizontal direction, and both the first elastic positioning head 11 and the second elastic positioning head 12 are configured to have an elastic force that brings them closer together. A positioning space 13 for a positioning screw 4 is formed between the first elastic positioning head 11 and the second elastic positioning head 12. The positioning space 13 is divided from top to bottom into a first guide cavity 131, a positioning cavity 133, and a second guide cavity 132. The diameter of the first guide cavity 131 gradually decreases from top to bottom, and the diameter of the second guide cavity 132 gradually increases from top to bottom. The positioning cavity 133 is clearance-fitted with the screw 4 to be positioned.

[0035] Compared with the prior art, in this embodiment, when assembling the screw 4, as the screw 4 is inserted downwards, the first guide cavity 131 is first opened by the screw 4. During this process, the inclined surfaces formed on the first elastic positioning head 11 and the second elastic positioning head 12 can guide the movement of the screw 4, achieving a centering effect. After the main body of the screw 4 enters the positioning cavity 133, the cylindrical positioning cavity 133 formed between the first elastic positioning head 11 and the second elastic positioning head 12 can position the screw 4, making it convenient for the screw 4 to be aligned with the screw hole. Then, by tightening the screw 4, the screw 4 can be screwed into the screw hole. In the initial stage of screwing the screw 4 into the screw hole, at this time, because the screw 4 The screw has a short engagement depth, and existing screws 4 are prone to displacement during this process due to the lack of corresponding positioning, resulting in misalignment between the screw 4 and the screw hole. In this embodiment, the first guide cavity 131 can provide an upward resultant force along the axis of the screw 4 to the top of the screw 4. Since the screw 4 has already been screwed into the screw hole, and due to the self-locking characteristic of the screw connection, the resultant force generated by the first guide cavity 131 on the screw 4 in this embodiment will not cause the screw 4 to loosen from the screw hole. Instead, it can keep the screw 4 in a neutral position during the screwing process, thus solving the technical problem that existing screws 4 are prone to displacement in the initial stage of screwing into the screw hole due to the short engagement depth.

[0036] In the above embodiment, after the screw 4 has a certain engagement depth, the connection between the screw 4 and the screw hole is relatively secure. After the nut on the top of the screw 4 enters the second guide cavity 132 through the positioning cavity 133, this embodiment can also determine the engagement depth of the screw 4 by judging the gap between the first elastic positioning head 11 and the second elastic positioning head 12, so as to play a visual aid role in the assembly process of the screw 4, thereby solving the technical problem that the existing torque wrench can only judge whether the screw 4 is tightened by torque.

[0037] In the above embodiment, when disassembling screw 4, the first guide cavity 131 in the embodiment facilitates the screwdriver to be aligned with screw 4. After the screw head of screw 4 passes through the first guide cavity 131, the first guide cavity 131 in this embodiment can assist in the disassembly of screw 4. After screw 4 is loosened from the screw hole, this embodiment can use the first guide cavity 131 to lift screw 4 out, so that screw 4 is suspended in the air. After screw 4 is suspended in the air, the top nut of screw 4 can be locked by the first elastic positioning head 11 and the second elastic positioning head 12 to prevent screw 4 from falling. And because the lower part of screw 4 is in a strong clearance fit with the positioning head, this embodiment can tilt all screw 4 to the designated position by flipping the screw loading and unloading positioning device in this embodiment after all screws 4 have been removed from the screw hole, thus preventing screw 4 from being lost.

[0038] Based on the above embodiments, in order to achieve elastic movement of the first elastic positioning head 11 and the second elastic positioning head 12, the elastic positioning part 1 further includes a first spring 14 and a second spring 15, both extending along a first horizontal direction. The first spring 14 supports the first elastic positioning head 11 and is configured to have a preload force that causes the first elastic positioning head 11 to press against the second elastic positioning head 12. The second spring 15 supports the second elastic positioning head 12 and is configured to have a preload force that causes the second elastic positioning head 12 to press against the first elastic positioning head 11. In this embodiment, through the mutual cooperation of the first spring 14 and the second spring 15, the first elastic positioning head 11 and the second elastic positioning head 12 can abut against each other, which is beneficial for keeping the screw 4 neutral.

[0039] In one possible implementation, the screw mounting and dismounting positioning device further includes a first positioning plate 2 and a second positioning plate 3. The first positioning plate 2 has a first receiving groove 21, the length direction of which is parallel to the first horizontal direction. The first spring 14, the first elastic positioning head 11, the second elastic positioning head 12, and the second spring 15 are sequentially arranged in the first receiving groove 21 along the first horizontal direction. A first positioning through hole 22 is provided in the middle of the first receiving groove 21, the depth direction of which is parallel to the vertical direction. The second positioning plate 3 is stacked on the upper surface of the first positioning plate 2. The first elastic positioning head 11 and the second elastic positioning head 12 are slidably disposed between the first positioning plate 2 and the second positioning plate 3. The second positioning plate 3 has a second positioning through hole 31, the depth direction of which is parallel to the vertical direction, and the second positioning through hole 31 and the first positioning through hole 22 are coaxially arranged. In this embodiment, the first receiving groove 21 in the first positioning plate 2 provides sufficient installation space for each spring and each elastic positioning head mentioned above, and helps to prevent the positioning heads from shaking randomly during movement. In addition, the second positioning plate 3 can cover each spring and each positioning head to prevent foreign objects from getting stuck in the first receiving groove 21.

[0040] In one possible implementation, a first mounting rod 111 is provided on the side of the first elastic positioning head 11 away from the second elastic positioning head 12. One end of the first spring 14 is sleeved on the first mounting rod 111, and the other end abuts against the inner wall of the first receiving groove 21. A second mounting rod 121 is provided on the side of the second elastic positioning head 12 away from the first elastic positioning head 11. One end of the second spring 15 is sleeved on the second mounting rod 121, and the other end abuts against the inner wall of the first receiving groove 21. Compared with the prior art, this embodiment can guide the movement of the spring using the mounting rod, so that the elastic thrust of the spring is always along the first horizontal direction.

[0041] In one possible implementation, the screw-loading and unloading positioning device further includes a screwdriver having a first degree of freedom of movement along a first horizontal direction, a second degree of freedom of movement along a second horizontal direction, and a third degree of freedom of movement along a vertical direction, wherein the second horizontal direction is perpendicular to the first horizontal direction, and the screwdriver tip is magnetically compatible with the screw 4. Compared with the prior art, this embodiment can utilize the mutual adaptation between the screwdriver and the elastic positioning part 1 to position the screw 4, thereby improving the loading and unloading efficiency of the screw 4 in the Kovar frame.

[0042] Based on the above embodiments, the upper surface of the first positioning plate 2 is provided with multiple screw holes, which are evenly distributed along the edge of the first positioning plate 2. The second positioning plate 3 is fixed to the first positioning plate 2 by bolts connecting to the screw holes. This embodiment can utilize the bolts connecting to the screw holes to form a stable connection between the first positioning plate 2 and the second positioning plate 3, making the overall structure of the present invention stable and reliable, and preventing damage during practical use.

[0043] In one possible embodiment, the sidewall of the first receiving groove 21 is provided with a first guide groove 211 extending along a first horizontal direction. The outer walls of both the first elastic positioning head 11 and the second elastic positioning head 12 are provided with first sliders 16. The first sliders 16 are slidably adapted to the first guide groove 211. Along a second horizontal direction away from the positioning space 13, the vertical widths of both the first guide groove 211 and the first sliders 16 gradually increase. Based on the same inventive concept, further, the bottom wall of the first receiving groove 21 is provided with a second guide groove 212 extending along a first horizontal direction. The bottoms of both the first elastic positioning head 11 and the second elastic positioning head 12 are provided with second sliders 17. The second sliders 17 are slidably adapted to the second guide groove 212. From top to bottom, the horizontal widths of both the second guide groove 212 and the second sliders 17 gradually increase. Compared with the prior art, this embodiment can utilize the sliding adaptation of the first guide groove 211 and the first slider 16 to guide the movement of the two positioning heads in the first receiving groove 21, preventing uncontrollable displacement of the two positioning heads during their movement in the first receiving groove 21. Similarly, this embodiment can utilize the sliding fit between the second guide groove 212 and the second slider 17 to enhance the stability of the connection between the two positioning heads and the first positioning plate 2, further preventing the two positioning heads from shifting during the movement in the first receiving groove 21. At the same time, the present invention can also use the damping of the connection between the two positioning heads by the two receiving grooves to prevent the two positioning heads from shaking randomly, thereby enhancing the stability of each component in the present invention.

[0044] In one possible implementation, along the first horizontal direction, annular grooves 213 are provided on both opposite inner sidewalls of the first receiving groove 21. The two annular grooves 213 are respectively used to install the first spring 14 and the second spring 15. The beneficial effect of this embodiment is that the annular grooves 213 can control the radial displacement of the two springs, preventing them from shifting during the movement of the positioning heads, thus improving the positioning accuracy of the two positioning heads on the screw 4 in this embodiment.

[0045] Based on the same inventive concept, the present invention also proposes a production line that includes the screw loading and unloading positioning device mentioned above.

[0046] Compared with the prior art, the production line of the present invention has all the advantages of the aforementioned positioning equipment for screw loading and unloading, which will not be elaborated here.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A positioning device for screw loading and unloading, characterized in that, include: The elastic positioning part (1) includes a first elastic positioning head (11) and a second elastic positioning head (12). The elastic extension and contraction directions of the first elastic positioning head (11) and the second elastic positioning head (12) are both parallel to the first horizontal direction. The first elastic positioning head (11) and the second elastic positioning head (12) are both configured to have elastic forces that bring them closer to each other. A positioning space (13) for a positioning screw (4) is formed between the first elastic positioning head (11) and the second elastic positioning head (12). The positioning space (13) is divided into a first guide cavity (131), a positioning cavity (133), and a second guide cavity (132) from top to bottom. The cavity diameter of the first guide cavity (131) gradually decreases from top to bottom, and the cavity diameter of the second guide cavity (132) gradually increases from top to bottom. The positioning cavity (133) is clearance-fitted with the screw (4) to be positioned.

2. The positioning device for screw installation and removal as described in claim 1, characterized in that, The elastic positioning part further includes a first spring (14) and a second spring (15) both extending along a first horizontal direction. The first spring (14) is used to support the first elastic positioning head (11) and is configured to have a preload force that causes the first elastic positioning head (11) to press against the second elastic positioning head (12). The second spring (15) is used to support the second elastic positioning head (12) and is configured to have a preload force that causes the second elastic positioning head (12) to press against the first elastic positioning head (11).

3. The positioning device for screw installation and removal as described in claim 2, characterized in that, The screw mounting and dismounting positioning device further includes a first positioning plate (2) and a second positioning plate (3). The first positioning plate (2) has a first receiving groove (21). The length direction of the first receiving groove (21) is parallel to the first horizontal direction. The first spring (14), the first elastic positioning head (11), the second elastic positioning head (12) and the second spring (15) are sequentially arranged in the first receiving groove (21) along the first horizontal direction. A first positioning through hole (22) is opened in the middle of the first receiving groove (21). The depth direction of the first positioning through hole (22) is parallel to the vertical direction. The second positioning plate (3) is stacked on the upper surface of the first positioning plate (2). The first elastic positioning head (11) and the second elastic positioning head (12) are slidably arranged between the first positioning plate (2) and the second positioning plate (3). The second positioning plate (3) has a second positioning through hole (31) with the depth direction parallel to the vertical direction. The second positioning through hole (31) and the first positioning through hole (22) are coaxially arranged.

4. The positioning device for screw loading and unloading as described in claim 3, characterized in that, The first elastic positioning head (11) is provided with a first mounting rod (111) on the side away from the second elastic positioning head (12). One end of the first spring (14) is sleeved on the first mounting rod (111), and the other end abuts against the inner wall of the first receiving groove (21). The second elastic positioning head (12) is provided with a second mounting rod (121) on the side away from the first elastic positioning head (11). One end of the second spring (15) is sleeved on the second mounting rod (121), and the other end abuts against the inner wall of the first receiving groove (21).

5. The positioning device for screw loading and unloading as described in claim 1, characterized in that, The screw mounting and dismounting positioning device also includes a screwdriver, which has a first degree of freedom to move along a first horizontal direction, a second degree of freedom to move along a second horizontal direction, and a third degree of freedom to move along a vertical direction. The second horizontal direction is perpendicular to the first horizontal direction, and the screwdriver tip can be magnetically coupled to the screw (4).

6. The positioning device for screw installation and removal as described in claim 3, characterized in that, The upper surface of the first positioning plate (2) is provided with a plurality of screw holes, and each screw hole is evenly distributed on the edge of the first positioning plate (2). The second positioning plate (3) is fixed to the first positioning plate (2) by bolts and screws connected to the screw holes.

7. The positioning device for screw loading and unloading as described in claim 3, characterized in that, The sidewall of the first receiving groove (21) is provided with a first guide groove (211) extending along a first horizontal direction. The outer walls of the first elastic positioning head (11) and the second elastic positioning head (12) are each provided with a first slider (16). The first slider (16) is slidably adapted to the first guide groove (211). Along a second horizontal direction away from the positioning space (13), the vertical width of the first guide groove (211) and the first slider (16) gradually increases.

8. The positioning device for screw loading and unloading as described in claim 3, characterized in that, The bottom wall of the first receiving groove (21) is provided with a second guide groove (212) extending along the first horizontal direction. The bottom of the first elastic positioning head (11) and the second elastic positioning head (12) are both provided with a second slider (17). The second slider (17) slides and adapts to the second guide groove (212). From top to bottom, the horizontal width of the second guide groove (212) and the second slider (17) gradually increases.

9. The positioning device for screw loading and unloading as described in claim 3, characterized in that, Along the first horizontal direction, annular grooves (213) are provided on the two opposite inner sidewalls of the first receiving groove (21), and the two annular grooves (213) are respectively used to install the first spring (14) and the second spring (15).

10. A production line, characterized in that, It includes a positioning device for screw loading and unloading as described in any one of claims 1 to 9.

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