A screw locking device and method

Abstract

The present application belongs to the technical field of screw locking equipment, and discloses a screw locking device and method, which comprises a frame body, a screw positioning mechanism, a screw locking mechanism, a transfer mechanism and a rotating mechanism. The screw locking device provided by the present application drives the screw positioning mechanism to rotate through the rotating mechanism, so that the screw clamped by the screw positioning mechanism is coaxially arranged with the threaded hole. Then, the transfer mechanism drives the screw positioning mechanism to descend and the screw positioning mechanism puts the screw into the threaded hole. Finally, the screw locking mechanism can descend to lock the screw, thereby realizing that the screw is first supplied into the threaded hole and then locked by the screw locking mechanism, and thus the problem that the screw is easily dropped when the bit of the existing air blowing or air suction screw locking mechanism pushes the screw into the inclined threaded hole can be avoided. In addition, the artificial participation degree is low during the above-mentioned screw locking process, and the efficiency and quality of screw locking can be ensured.

Description

Technical Field

[0001] This invention relates to the field of screw fastening equipment technology, and in particular to a screw fastening device and method. Background Technology

[0002] Screw fastening mechanisms are widely used in home appliances, automobiles, electronics, and communications. Currently, screw fastening mechanisms on the market are generally divided into air-blowing and air-suction types. In an air-blowing screw fastening mechanism, an air-blowing feeder blows the screw into a chuck mechanism through an air tube. The screw is then held in place by a magnetic bit or magnetic ring, and a drive mechanism moves the bit to complete the fastening operation. In an air-suction screw fastening mechanism, a telescopic mechanism drives a screw sleeve to move up and down. An air suction tube then draws the screw from the feeder into the screw sleeve via a suction tube, and a drive mechanism moves the bit to complete the fastening operation.

[0003] Because both air-blowing and air-suction screw-locking mechanisms work by first feeding the screw to the screwdriver bit, which then pushes the screw into the threaded hole and tightens it, a fixture is often used to tilt the product at a certain angle to ensure the screw is not obstructed when tightening screws in confined spaces, or in situations where the screw might severely interfere with adjacent components. However, when pushing the screw into the tilted threaded hole, the screw is prone to falling out. To ensure the screw is correctly inserted into the threaded hole, current technology typically involves manually inserting the screw and then manually tightening it by tilting the screwdriver. However, this manual tightening method affects the efficiency and quality of screw tightening.

[0004] Therefore, the above problems urgently need to be solved. Summary of the Invention

[0005] The purpose of this invention is to provide a screw fastening device and method to avoid the problem that screws are prone to falling out when the screwdriver bit of the air-blowing or air-suction screw fastening mechanism in the prior art pushes the screw into the inclined threaded hole. At the same time, it reduces the degree of manual intervention in the screw fastening process to ensure the efficiency and quality of screw fastening.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A screw fastening device, comprising:

[0008] Frame;

[0009] A screw positioning mechanism is configured to clamp a screw and supply the screw into a threaded hole, and to position the screw within the threaded hole.

[0010] A screw-locking mechanism is configured to lock the screw positioned by the screw positioning mechanism to a preset position;

[0011] A transfer mechanism is provided on the frame. The transfer mechanism is configured to drive the screw positioning mechanism and the screw locking mechanism to slide synchronously in a first horizontal direction, and to drive the screw positioning mechanism and the screw locking mechanism to slide in a vertical direction respectively.

[0012] A rotating mechanism is disposed between the transfer mechanism and the screw positioning mechanism, and the rotating mechanism is configured to drive the screw positioning mechanism to rotate about an axis.

[0013] Preferably, the screw positioning mechanism includes:

[0014] The carrier component is driven to slide by the transfer mechanism;

[0015] A positioning element is slidably disposed on the bearing element in a vertical direction. The positioning element includes a positioning hole that extends through in a vertical direction. The positioning hole includes a locking part and a receiving part that are connected. There is a step between the locking part and the receiving part that can abut against the screw head.

[0016] A first driving element is configured to drive the positioning element to slide;

[0017] An adsorption element includes an adsorption portion, wherein the locking portion is used for the adsorption portion to pass through to adsorb the head of a screw;

[0018] The transfer component is configured to drive the adsorption element to move along a preset path.

[0019] Preferably, the receiving portion is able to avoid contact with at least one inner wall of the head of the received screw.

[0020] Preferably, the locking part is connected to an avoidance groove.

[0021] Preferably, the screw-locking mechanism includes:

[0022] The adapter is a sliding component driven by the transfer mechanism.

[0023] A bit is provided on the adapter, with the bit facing downwards.

[0024] Preferably, the screw-locking mechanism further includes:

[0025] The vision inspection component is configured to locate the position of the threaded hole.

[0026] Preferably, the screw fastening device further includes:

[0027] A torque calibration mechanism is disposed on the frame and is configured to calibrate the torque of the bit.

[0028] Preferably, the torque calibration mechanism includes:

[0029] A torque sensor is mounted on the frame.

[0030] A contouring component is disposed on the torque sensor, which is configured to detect the magnitude of the torque generated when the contouring component rotates.

[0031] Preferably, the rotating mechanism includes:

[0032] A rotating component, wherein the transfer mechanism drives the rotating component to slide, and the rotating component includes a rotatable turntable;

[0033] A support member is disposed on the turntable, and at least one screw positioning mechanism is provided on the support member.

[0034] A screw fastening method, applied to the aforementioned screw fastening device, the screw fastening method comprising the following steps:

[0035] The transfer mechanism drives the screw positioning mechanism to slide to the threaded hole;

[0036] The rotating mechanism drives the screw positioning mechanism to rotate so that the screw held by the screw positioning mechanism is coaxial with the threaded hole.

[0037] The transfer mechanism drives the screw positioning mechanism to descend, the screw positioning mechanism places the screw into the threaded hole, and the screw positioning mechanism positions the screw in the threaded hole;

[0038] The transfer mechanism drives the screw-locking mechanism to descend, and the screw-locking mechanism locks the screw into the threaded hole.

[0039] As a preferred option,

[0040] The beneficial effects of this invention are:

[0041] 1. The screw fastening device provided by the present invention drives the screw positioning mechanism to rotate through a rotating mechanism so that the screw held by the screw positioning mechanism is coaxially arranged with the threaded hole. Then, the transfer mechanism drives the screw positioning mechanism to descend and the screw positioning mechanism puts the screw into the threaded hole. Finally, the screw fastening mechanism can descend to fasten the screw. This realizes that the screw is first supplied into the threaded hole and then the screw fastening mechanism fastens the screw. This avoids the problem that the screw is easy to fall off when the screwdriver bit of the air-blowing or air-suction screw fastening mechanism in the prior art pushes the screw into the inclined threaded hole.

[0042] 2. The screw fastening device provided by the present invention has a low degree of manual intervention in the screw fastening process, which can ensure the efficiency and quality of screw fastening.

[0043] 3. The receiving part provided by the present invention can position the screw, so that the screw being attracted is always on the same axis as the screwdriver bit during the fastening process, thereby ensuring the normal operation of the screw fastening work.

[0044] 4. The receiving part provided by the present invention can avoid contact with at least one side wall of the head of the screw being received, so that the head of the screw can be slightly deflected within the receiving part. On the one hand, it can avoid the receiving part and the head of the screw getting stuck. On the other hand, it can be applied to special scenarios of fastening slightly deflected screws. Attached Figure Description

[0045] Figure 1 This is a schematic diagram of the screw fastening device provided by the present invention;

[0046] Figure 2 This is a schematic diagram of the screw positioning mechanism provided by the present invention;

[0047] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0048] Figure 4 This is a schematic diagram of the positioning hole provided by the present invention;

[0049] Figure 5 This is a flowchart of the screw fastening method provided by the present invention.

[0050] In the picture:

[0051] 1. Frame;

[0052] 2. Screw positioning mechanism; 21. Bearing component; 22. First driving component; 23. Positioning component; 231. Positioning hole; 2311. Locking part; 2312. Receiving part; 2313. Clearance groove; 24. Adsorption component; 241. Adsorption part; 25. Transfer assembly; 251. Second driving component; 252. Third driving component; 26. First buffer component; 27. Second buffer component;

[0053] 3. Screw tightening mechanism; 31. Adapter; 32. Screwdriver bit; 33. Visual inspection component;

[0054] 4. Transfer mechanism;

[0055] 5. Rotating mechanism; 51. Rotating component; 52. Supporting component;

[0056] 6. Torque calibration mechanism; 61. Torque sensor; 62. Profile part. Detailed Implementation

[0057] Before explaining any implementation of this application in detail, it should be understood that this application is not limited to its application to the structural details and component arrangements set forth in the following description or shown in the above drawings.

[0058] In this application, the terms "comprising," "including," "having," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0059] In this application, the term "and / or" describes a relationship between related objects, indicating that three relationships can exist. For example, a centrifugal vortex magnetic pump and / or a centrifugal vortex magnetic pump can represent: the existence of only one centrifugal vortex magnetic pump, the simultaneous existence of one centrifugal vortex magnetic pump and a centrifugal vortex magnetic pump, or the existence of only one centrifugal vortex magnetic pump. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "and / or" relationship.

[0060] In this application, the terms "connection," "combination," "coupling," and "installation" can refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, a direct connection refers to two parts or components being connected together without the need for an intermediary, while an indirect connection refers to two parts or components each being connected to at least one intermediary, with the connection achieved through the intermediary. Furthermore, "connection" and "coupling" are not limited to physical or mechanical connections or couplings, but can also include electrical connections or couplings.

[0061] In this application, those skilled in the art will understand that relative terms (e.g., “about,” “approximately,” “basically,” etc.) used in conjunction with quantities or conditions are to include the values ​​and have the meaning indicated by the context. For example, such relative terms include at least the degree of error associated with the measurement of a particular value, tolerances associated with the particular value due to manufacturing, assembly, use, etc. Such terms should also be considered as disclosing a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​not using relative terms should also be disclosed as specific values ​​with tolerances. Furthermore, “basically” when expressing relative angular relationships (e.g., substantially parallel, substantially perpendicular) may refer to a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) added to or subtracted from the indicated angle.

[0062] In this application, those skilled in the art will understand that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0063] In this application, the directional terms "upper," "lower," "left," "right," "front," and "rear" are used to describe the orientation and positional relationships shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when an element is mentioned as being connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected through an intermediate element. It should also be understood that directional terms such as upper side, lower side, left side, right side, front side, and rear side not only represent positive orientation but can also be understood as lateral orientation. For example, "below" can include directly below, lower left, lower right, lower front, and lower rear.

[0064] Based on the foregoing, screw fastening mechanisms on the market are generally divided into air-blowing and air-suction types. In an air-blowing screw fastening mechanism, an air-blowing feeder blows the screw into a chuck mechanism through an air pipe. The screw is then held in place by a magnetic bit or ring, and a drive mechanism moves the bit to complete the fastening operation. In an air-suction screw fastening mechanism, a telescopic mechanism moves a screw sleeve up and down. An air suction pipe draws the screw from the feeder into the screw sleeve onto a screw bit, and a drive mechanism moves the bit to complete the fastening operation. Both air-blowing and air-suction screw fastening mechanisms first supply the screw to the bit, and then the bit pushes the screw into the threaded hole to fasten it. Currently, when tightening screws in confined spaces, or in situations where the screw might severely interfere with adjacent components, a fixture is typically used to tilt the product at an angle to ensure the screw is not obstructed from directly above the threaded hole, allowing the blow-type or suction-type screw-tightening mechanism's bit to push the screw into the threaded hole. However, the screw is prone to falling out when the blow-type or suction-type screw-tightening mechanism's bit pushes it into the tilted threaded hole. To ensure the screw is correctly inserted into the threaded hole, current technology typically involves manually inserting the screw and then manually tightening it with a tilted screwdriver. However, this manual tightening method affects the efficiency and quality of screw tightening.

[0065] To resolve the above issues, please refer to [link / reference]. Figures 1 to 4 This embodiment provides a screw fastening device, which includes a frame 1, a screw positioning mechanism 2, a screw fastening mechanism 3, a transfer mechanism 4, and a rotating mechanism 5. The screw positioning mechanism 2 is configured to clamp a screw and supply it into a threaded hole, and to position the screw within the threaded hole. The screw fastening mechanism 3 is configured to fasten the screw positioned by the screw positioning mechanism 2 to a preset position. In this embodiment, the preset position is the threaded hole on the product. The transfer mechanism 4 is disposed on the frame 1 and is configured to drive the screw positioning mechanism 2 and the screw fastening mechanism 3 to slide synchronously along a first horizontal direction, and to drive the screw positioning mechanism 2 and the screw fastening mechanism 3 to slide vertically (perpendicular to the horizontal plane) respectively. The rotating mechanism 5 is disposed between the transfer mechanism 4 and the screw positioning mechanism 2, and is configured to drive the screw positioning mechanism 2 to rotate around an axis.

[0066] Please see Figure 5 In addition, this embodiment also provides a screw fastening method applied to the above-mentioned screw fastening device, the screw fastening method comprising the following steps:

[0067] The transfer mechanism 4 drives the screw positioning mechanism 2 to move to the screw feeding device (existing technology, not shown in the figure) to pick up the screw;

[0068] The transfer mechanism 4 drives the screw positioning mechanism 2 to slide to the threaded hole;

[0069] The rotating mechanism 5 drives the screw positioning mechanism 2 to rotate so that the screw held by the screw positioning mechanism 2 is coaxial with the threaded hole.

[0070] The transfer mechanism 4 drives the screw positioning mechanism 2 to descend, and the screw positioning mechanism 2 places the screw into the threaded hole, positioning the screw in the threaded hole.

[0071] The transfer mechanism 4 drives the screw-locking mechanism 3 to descend, and the screw-locking mechanism 3 locks the screw into the threaded hole.

[0072] Understandably, the rotating mechanism 5 drives the screw positioning mechanism 2 to rotate, so that the screw held by the screw positioning mechanism 2 is coaxially positioned with the threaded hole. Then, the transfer mechanism 4 drives the screw positioning mechanism 2 to descend, and the screw positioning mechanism 2 places the screw into the threaded hole. Finally, the screw-locking mechanism 3 descends to lock the screw in place. This achieves the goal of first supplying the screw into the threaded hole, and then having the screw-locking mechanism 3 lock the screw in place. This avoids the problem of screws easily falling out when the screwdriver bit pushes the screw into the inclined threaded hole in existing air-blowing or air-suction screw-locking mechanisms. Furthermore, the above screw-locking process involves low manual intervention, ensuring both efficiency and quality in screw-locking.

[0073] It should be noted that the aforementioned screw fastening device is also applicable to fastening screws to threaded holes that are inclined on the product itself. It is not limited to scenarios where the threaded hole of the product is obstructed and a fixture is needed to tilt the product at a certain angle to make the threaded hole tilt at a certain angle. Therefore, this embodiment does not make specific requirements or limitations in this regard. It should also be noted that in some specific embodiments, the transfer mechanism 4 can be a multi-axis manipulator in the prior art, or it can be assembled using any one or more linear drive mechanisms in the prior art. For example, it can be assembled using three linear modules, one of which ensures that its movable part slides along the first horizontal direction, and the other two linear modules are both set on the movable parts of the above-mentioned linear module. The movable parts of the two linear modules slide along the vertical direction and are respectively used to support the screw fastening mechanism 3 and the screw positioning mechanism 2. This will not be described in detail.

[0074] The screw positioning mechanism 2 includes a carrier 21, a first driving member 22, a transfer assembly 25, a positioning member 23, and an adsorption member 24. The transfer mechanism 4 drives the carrier 21 to slide. The positioning member 23 is slidably disposed on the carrier 21 in a vertical direction. The positioning member 23 includes a positioning hole 231 that extends vertically through the carrier 21. The positioning hole 231 includes a connecting locking portion 2311 and a receiving portion 2312, with a step between the locking portion 2311 and the receiving portion 2312 that can abut against the screw head. The first driving member 22 is configured to drive the positioning member 23 to slide. The adsorption member 24 includes an adsorption portion 241, and the locking portion 2311 is used for the adsorption portion 241 to pass through to adsorb the screw head.

[0075] In practical applications, the first driving component 22 first drives the positioning component 23 to descend, so that the positioning component 23 is located in the material tray (or screw feeder) carrying the screw. Then, the transfer component 25 drives the suction part 241 of the suction component 24 to extend into the locking part 2311. Then, the suction part 241 suctions a screw in the material tray and holds it in the receiving part 2312. Then, the first driving component 22 and the transfer component 25 drive the positioning component 23 and the suction component 24 to rise synchronously. Finally, after the screw positioning mechanism 2 moves to the screw locking position, the first driving component 22 and the transfer component 25 drive the positioning component 23 and the suction component 24 to descend synchronously. The suction part 241 releases the screw in the receiving part 2312, so that the screw falls into the threaded hole on the screw locking position. Then, the screw is locked by the screwdriver bit 32. It should be noted that for conventional screw feeding devices, the screw head at the feeding port is flush with the feeding port and has no protruding part. Therefore, the suction part 241 needs to suction the screw into the receiving part 2312 of the positioning member 23 and hold it there. In addition, to ensure that the screwdriver bit 32 can subsequently tighten screws normally, after the screw is screwed into the threaded hole, the suction part 241 needs to be moved away from above the positioning hole 231 to provide operating space for the screwdriver bit 32. It can be understood that by positioning the screw through the receiving part 2312, the screw being suctioned can always be on the same axis as the screwdriver bit 32 during the tightening process, thereby ensuring the normal operation of the screw tightening work. It should be noted that in this embodiment, the first driving member 22 is preferably a cylinder.

[0076] To reduce the error rate of screw fastening, the receiving portion 2312 is designed to not contact at least one sidewall of the screw head, allowing the screw head to be slightly offset within the receiving portion 2312. This prevents the receiving portion 2312 from jamming with the screw head and is suitable for fastening slightly offset screws in special scenarios. It should be noted that to ensure the receiving portion 2312 does not contact at least one sidewall of the screw head, the receiving portion 2312 can be configured as an oblong hole or have an avoidance groove on its inner wall, making the receiving portion 2312 slightly larger than the screw head, thus ensuring a slight offset within the receiving portion 2312. To further improve the applicability of the screw positioning mechanism 2, the fastening portion 2311 is connected to an avoidance groove 2313, thereby preventing interference between the fastening portion 2311 and the screwdriver bit 32.

[0077] Specifically, the transfer assembly 25 includes a second driving member 251 and a third driving member 252. The second driving member 251 is configured to drive the adsorption member 24 to move vertically. The third driving member 252 is configured to drive the second driving member 251 to move horizontally. To ensure consistency when the positioning member 23 and the adsorption member 24 rise and fall together, in this embodiment, the first driving member 22 is disposed on the support member 21, and the third driving member 252 and the positioning member 23 are both disposed on the moving end of the first driving member 22. It should be noted that the second driving member 251 and the third driving member 252 are preferably cylinders. Of course, in other embodiments, to meet the requirements of the movement path of the adsorption member 24, the transfer assembly 25 may also include a fourth driving member, which is configured to drive the third driving member 252 to move horizontally. It should be noted that the first horizontal direction and the second horizontal direction can be set to correspond to the X and Y directions in the three-dimensional coordinate system, respectively. Understandably, the arrangement of the second driving component 251 and the third driving component 252 allows the adsorption component 24 to move along the X and Y directions in the three-dimensional coordinate system, thereby enabling the adsorption component 24 to better avoid the bit 32 or other components, so as to ensure the normal operation of the screw fastening work.

[0078] Furthermore, the screw positioning mechanism 2 also includes a first buffer 26, which is disposed between the moving ends of the positioning member 23 and the first driving member 22. The first buffer 26 is configured to buffer the force applied to the moving end of the first driving member 22 by the upward movement of the positioning member 23. It is understood that the first buffer 26 can buffer the force received by the positioning member 23, thereby providing a certain degree of protection for the positioning member 23. Specifically, the first buffer 26 includes at least one telescopic spring, which is arranged vertically, and its two ends are respectively connected to the moving ends of the positioning member 23 and the first driving member 22. It is understood that telescopic springs have the advantages of simple structure and low cost. In this embodiment, three telescopic springs are provided. Of course, in other embodiments, four, five, or more telescopic springs can be provided, without any requirements or limitations.

[0079] Furthermore, the screw positioning mechanism 2 also includes a second buffer 27, which is disposed on the moving ends of the adsorption member 24 and the second driving member 251. The second buffer 27 is configured to buffer the force applied to the moving end of the second driving member 251 by the upward movement of the adsorption member 24. It can be understood that the second buffer 27 can buffer the force received by the adsorption member 24, thereby providing a certain degree of protection for the adsorption member 24. It should be noted that in this embodiment, the structure of the second buffer 27 is consistent with the structure of the first buffer 26, and therefore will not be described in detail.

[0080] To extend the service life of the adsorption component 24, the adsorption part 241 is an electromagnet. It is understood that electromagnets have advantages over permanent magnets in terms of both service life and magnetic properties. It should be noted that the term "electromagnet" here refers to the magnetization of the adsorption part 241 by an electromagnetic mechanism, and does not narrowly indicate that the component (device) is an electromagnet. It should also be noted that electromagnets and their working principles are existing technology, and are not improvements made in this application; therefore, they will not be described in detail. Furthermore, it should be noted that in other embodiments, the adsorption component 24 can also employ existing vacuum suction cups or other mechanisms with adsorption functions; this embodiment does not impose specific requirements or limitations on this.

[0081] To improve the reliability of the screw positioning mechanism 2, the first driving component 22 is a driving cylinder. It is understood that the driving cylinder is a relatively mature driving mechanism in the prior art, possessing advantages such as stable operation and long service life, thus contributing to the improvement of the reliability of the screw positioning mechanism 2. To further enhance the reliability of the screw positioning mechanism 2, the second driving component 251 and the third driving component 252 can both adopt driving cylinders in the prior art, which will not be described in detail here. The screw-locking mechanism 3 includes an adapter 31 and a screwdriver bit 32. The transfer mechanism 4 drives the adapter 31 to slide, and the screwdriver bit 32 is disposed on the adapter 31 with its head facing downwards. This allows the third driving mechanism to drive the adapter 31 to slide, thereby raising and lowering the screwdriver bit 32. It should be noted that the screwdriver bit 32 is preferably an electric screwdriver bit in the prior art. The specific model of the electric screwdriver bit is selected according to the actual application scenario, and this embodiment does not impose specific requirements or limitations on this.

[0082] Preferably, the screw-locking mechanism 3 further includes a vision inspection element 33, which is configured to locate the position of the threaded hole. It should be noted that the vision inspection element 33 is preferably a CCD positioning mechanism (vision inspection device) from the prior art. The CCD positioning mechanism and its working principle are well known to those skilled in the art, and this embodiment does not make any improvements to the CCD positioning mechanism and its working principle, therefore, it will not be described in detail. It is understood that using the vision inspection element 33 to locate the position of the threaded hole enables the screw positioning mechanism 2 to accurately feed the screw into the threaded hole, and also enables the screw-locking mechanism 3 to accurately move to the threaded hole for screw fastening.

[0083] To further ensure the quality of screw fastening, the screw fastening device also includes a torque calibration mechanism 6, which is mounted on the frame 1 and configured to calibrate the torque of the screwdriver bit 32. Specifically, the torque calibration mechanism 6 includes a torque sensor 61 and a contour piece 62. The torque sensor 61 is mounted on the frame 1, and the contour piece 62 is mounted on the torque sensor 61. The torque sensor 61 is configured to detect the magnitude of the torque generated when the contour piece 62 rotates. It can be understood that by turning the contour piece 62 with the screwdriver bit 32, the torque sensor 61 can detect whether the torque of the screwdriver bit 32 is qualified, thereby achieving torque calibration of the screwdriver bit 32. It should be noted that the torque sensor 61 is existing technology and will not be described in detail. It should also be noted that the specific structure of the contour piece 62 is designed according to the model of the screwdriver bit 32 being tested, and no specific requirements or limitations are imposed on it.

[0084] To ensure the accuracy of the screw positioning mechanism 2's rotation, the rotating mechanism 5 includes a rotating component 51 and a supporting component 52. The rotating component 51 is mounted on the second sliding component and includes a rotatable turntable. The supporting component 52 is mounted on the turntable and has at least one screw positioning mechanism 2. In this embodiment, the supporting component 52 and the carrier component 21 in the screw positioning mechanism 2 are an integral structure, but they can also be fixedly connected separate structures. It should be noted that the rotating component 51 is preferably a rotary motor from the prior art. To further improve the efficiency of screw fastening, the number of screw positioning mechanisms 2 provided on the supporting component 52 can be selected according to the actual application scenario to achieve simultaneous placement of multiple screws into multiple threaded holes. In this embodiment, the supporting component 52 has two screw positioning mechanisms 2.

[0085] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A screw fastening device, characterized in that, include: Frame (1); A screw positioning mechanism (2) is configured to clamp a screw and supply the screw into a threaded hole, and to position the screw in the threaded hole. The screw positioning mechanism (2) includes a carrier (21), a positioning element (23), a first driving element (22), an adsorption element (24), and a transfer assembly (25). The transfer mechanism (4) drives the carrier (21) to slide. The positioning element (23) is slidably disposed on the carrier (21) in the vertical direction. The positioning element (23) includes a positioning hole (231) that extends through in the vertical direction. The positioning hole (231) includes a connecting locking element. The positioning member (23) comprises a locking part (2311) and a receiving part (2312), wherein a step is provided between the locking part (2311) and the receiving part (2312) to abut against the head of the screw; the first driving member (22) is configured to drive the positioning member (23) to slide; the adsorption member (24) includes an adsorption part (241), wherein the locking part (2311) is for the adsorption part (241) to pass through to adsorb the head of the screw; the transfer assembly (25) is disposed on the support member (21), and the transfer assembly (25) is configured to drive the adsorption member (24) to move along a preset path; The screw-locking mechanism (3) is configured to lock the screw positioned by the screw positioning mechanism (2) to a preset position; The transfer mechanism (4) is disposed on the frame (1). The transfer mechanism (4) is configured to drive the screw positioning mechanism (2) and the screw locking mechanism (3) to slide synchronously in the first horizontal direction, and to drive the screw positioning mechanism (2) and the screw locking mechanism (3) to slide in the vertical direction respectively. A rotating mechanism (5) is disposed between the transfer mechanism (4) and the screw positioning mechanism (2), and the rotating mechanism (5) is configured to drive the screw positioning mechanism (2) to rotate about an axis.

2. The screw fastening device according to claim 1, characterized in that, The receiving portion (2312) is able to avoid contact with at least one side wall of the head of the received screw.

3. The screw fastening device according to claim 1, characterized in that, The locking part (2311) is connected to the clearance groove (2313).

4. A screw fastening device according to claim 1, characterized in that, The screw-locking mechanism (3) includes: The adapter (31) is driven to slide by the transfer mechanism (4); A bit (32) is disposed on the adapter (31) with the bit (32) facing downward.

5. A screw fastening device according to claim 4, characterized in that, The screw-locking mechanism (3) also includes: The visual inspection component (33) is configured to locate the position of the threaded hole.

6. A screw fastening device according to claim 4, characterized in that, The screw fastening device further includes: A torque calibration mechanism (6) is disposed on the frame (1) and is configured to calibrate the torque of the bit (32).

7. A screw fastening device according to claim 6, characterized in that, The torque calibration mechanism (6) includes: A torque sensor (61) is mounted on the frame (1); A contouring component (62) is disposed on the torque sensor (61), which is configured to detect the magnitude of the torque generated when the contouring component (62) rotates.

8. A screw fastening device according to claim 1, characterized in that, The rotating mechanism (5) includes: Rotating component (51), the transfer mechanism (4) drives the rotating component (51) to slide, the rotating component (51) includes a turntable that can rotate; A support member (52) is disposed on the turntable, and at least one screw positioning mechanism (2) is provided on the support member (52).

9. A screw fastening method, characterized in that, The screw fastening device as described in any one of claims 1-8, the screw fastening method comprising the following steps: The transfer mechanism (4) drives the screw positioning mechanism (2) to slide to the threaded hole; The rotating mechanism (5) drives the screw positioning mechanism (2) to rotate so that the screw held by the screw positioning mechanism (2) is coaxial with the threaded hole; The transfer mechanism (4) drives the screw positioning mechanism (2) to descend, the screw positioning mechanism (2) places the screw into the threaded hole, and the screw positioning mechanism (2) positions the screw in the threaded hole; The transfer mechanism (4) drives the screw-locking mechanism (3) to descend, and the screw-locking mechanism (3) locks the screw into the threaded hole.

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