Screw driving device

Abstract

The application discloses a screwing device which comprises a mounting part, a clamping assembly, a rotary driver and an electric screwdriver. The clamping assembly is movably connected with the mounting part, and comprises two clamping jaws. The rotary driver is connected with the mounting part and the clamping assembly. The electric screwdriver is connected with the mounting part. The screw is clamped by the clamping jaws, the clamping assembly is driven to rotate by the rotary driver, and the screw is synchronously driven to rotate, so that the angle of the screw is adjusted, the screw can be loaded according to the angle of the screw hole, the accuracy of screwing the screw into the screw hole is improved, and the screw is tightened by the electric screwdriver, so that the screwing device can lock the screw of a product.

Description

Technical Field

[0001] This application relates to the field of screw-tightening equipment technology, and more particularly to a screw-tightening device. Background Technology

[0002] Generally, screw-locking equipment uses a vacuum sleeve coaxially mounted on an electric screwdriver. The vacuum sleeve picks up the screw, feeding it into the screw hole of the product, and then the electric screwdriver tightens the screw, thus achieving the function of automatic screw-locking.

[0003] However, some products have obstacles above the screw holes. When the vacuum sleeve feeds the screw into the screw hole, the vacuum sleeve is prone to interference with the obstacle. This requires the vacuum sleeve to feed the screw at a certain angle, resulting in an excessively large angle between the screw and the screw hole, which causes the screw to be unable to be screwed into the screw hole. Utility Model Content

[0004] In view of this, this application provides a screw-tightening device to solve the problem that when the screw is loaded into the screw hole, the included angle between the screw and the screw hole is too large, which causes the screw to be unable to be screwed into the screw hole.

[0005] This application provides a screw-tightening device, including a mounting component, a clamping assembly, a rotary driver, and an electric screwdriver. The clamping assembly is movably connected to the mounting component and includes two jaws for clamping screws. The rotary driver is connected to the mounting component and also to the clamping assembly. The rotary driver drives the clamping assembly to rotate relative to the mounting component, synchronously rotating the screw. The electric screwdriver is connected to the mounting component and located on one side of all the jaws, for rotating the screw.

[0006] In the above embodiments, the screw is held by a gripper, and the gripping assembly is driven to rotate by a rotary driver, which simultaneously drives the screw to rotate, so as to adjust the angle of the screw and make the screw adapt to the angle of the screw hole for feeding. This helps to improve the accuracy of screw screwing into the screw hole. Then, the screw is tightened by an electric screwdriver, realizing the function of screw tightening device to lock the screw on the product.

[0007] In some embodiments, each jaw is provided with a groove on the side of the jaw facing the other jaw, and the groove is used to receive the nut of the screw. Receiving the nut and limiting the screw by the groove helps to stabilize the jaws in holding the screw.

[0008] In some embodiments, the electric screwdriver and all the jaws are arranged opposite each other along the Z-axis, with two jaws arranged opposite each other in a direction perpendicular to the Z-axis, and the electric screwdriver positioned between the two jaws along the direction in which the two jaws are arranged opposite each other. Each jaw also includes a bevel, which is a sidewall of a groove, facing the electric screwdriver, and the bevel is used to apply a force toward the electric screwdriver to the screw.

[0009] When it is necessary to remove the screw, the screw is lifted by the nut supported by the bevel, so that the screw is away from the product and the jaws hold the screw.

[0010] In some embodiments, the electric screwdriver and all the jaws are arranged opposite each other along the Z-axis direction, and the jaws are also used to guide the screws moving along the Z-axis direction to improve the accuracy of the electric screwdriver in screwing the screws into the product.

[0011] In some embodiments, the clamping assembly includes a clamping cylinder connected to two grippers and driving the grippers to separate or close. The clamping cylinder has two opposing sides along the Y-axis, with the grippers located on one side of the clamping cylinder. A rotary driver is movably connected to the other side of the clamping cylinder away from the grippers. The two sides of the clamping cylinder are rotatably connected to the mounting component. The electric screwdriver and all the grippers are arranged opposite each other along the Z-axis, and the axis of rotation of the clamping cylinder is parallel to the X-axis. The X, Y, and Z axes are perpendicular to each other.

[0012] The clamping cylinder drives two grippers to separate or close, thus clamping or releasing the screw. The clamping cylinder is connected to the mounting component at its center, and a rotary actuator drives the cylinder to rotate, which in turn rotates the grippers, thereby enabling the grippers to rotate the screw.

[0013] In some embodiments, the screw-tightening device further includes a first movable component disposed on the mounting member, rotatably connected to a clamping cylinder, and also connected to a rotary driver. The first movable component is configured to drive the clamping cylinder and the rotary driver to move relative to the mounting member and the electric screwdriver along the Y-axis.

[0014] The first moving component drives the clamping cylinder to move the jaws and screw, so that the position of the screw can be adjusted when the jaws rotate the screw, thereby ensuring that the electric screwdriver is above the screw and improving the accuracy of the electric screwdriver in driving the screw to rotate.

[0015] In some embodiments, the screw-tightening device includes a second movable component disposed on a mounting member and connected to a clamping component. The second movable component is configured to drive the clamping component to move relative to the mounting member and the electric screwdriver, and simultaneously drive the jaws and screw to move relative to the electric screwdriver. The electric screwdriver and all the jaws are arranged opposite each other along the Z-axis direction, and the second movable component drives the clamping component to move along the Z-axis direction.

[0016] The second moving component drives the clamping component to move, thereby adjusting the distance between the jaws and the electric screwdriver, so that the electric screwdriver acts on the screw and drives the screw to rotate.

[0017] In some embodiments, the screw-tightening device includes a third moving component disposed on the mounting member. The third moving component is connected to both an electric screwdriver and a clamping component, and is configured to synchronously drive the electric screwdriver and the clamping component to move relative to the mounting member. The electric screwdriver and all the grippers are arranged opposite each other along the Z-axis, and the third moving component drives the electric screwdriver and the clamping component to move relative to the mounting member along the Z-axis.

[0018] The electric screwdriver and clamping assembly are moved by a third moving component, so that the electric screwdriver and clamping assembly can move close to the product for loading and screwing.

[0019] In some embodiments, the screw-tightening device further includes a measuring component located at the connection between the clamping component and the mounting member, the measuring component being used to measure the angle of rotation of the clamping component.

[0020] By measuring the rotation angle of the clamping component using a measuring component, the actual rotation angle of the screw can be determined, thereby controlling the rotary actuator to work or stop, which helps to improve the accuracy of the screw rotation angle.

[0021] In some embodiments, the screw-tightening device further includes a limiting mechanism for limiting the relative position of the electric screwdriver and the mounting component; and / or a limiting mechanism for limiting the relative position of the clamping assembly and the mounting component.

[0022] By using a limiting mechanism to limit the movement of the electric screwdriver or clamping assembly, the risk of collision between the electric screwdriver or clamping assembly and other components is reduced. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a screw-tightening device according to an embodiment of this application.

[0024] Figure 2 for Figure 1 Side view of the screw-tightening device.

[0025] Figure 3 for Figure 1 A partial structural diagram of the screw-tightening device.

[0026] Figure 4 for Figure 1 A schematic diagram showing the working status of the clamping components and the electric screwdriver.

[0027] Figure 5 for Figure 1 A schematic diagram of the screw-tightening device that removes the clamping assembly and electric screwdriver.

[0028] Explanation of main component symbols 10. Screw tightening device; 11. Mounting component; 12. Clamping assembly; 121. Gripper; 1211. Groove; 1212. Inclined surface; 1213. Upper part; 1214. Lower part; 122. Clamping cylinder; 1221. Slide groove; 13. Rotary actuator; 14. Electric screwdriver; 15. First moving assembly; 151. First moving actuator; 152. First slide rail; 153. First slider; 16. Second moving assembly; 161. Second moving actuator; 162. Second slide rail; 163. Second slider; 17. Third moving assembly; 171. Third moving actuator; 172. Third slide rail; 173. Third slider; 18. Measuring assembly; 181. Protractor; 182. Pointer; 19. Limiting mechanism; 30. Product; 31. Screw hole; 40. Screw; 41. Nut; 42. Stud. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0030] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to the other component or may have an intervening component. When a component is considered to be "placed" on another component, it can be directly placed on the other component or may have an intervening component. The terms "above," "below," "after," and similar expressions used in this document are for illustrative purposes only.

[0031] The terms “first”, “second”, etc., are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implying the quantity, specific order, or primary and secondary relationship of the indicated technical features.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0033] This application provides a screw-tightening device, including a mounting component, a clamping assembly, a rotary driver, and an electric screwdriver. The clamping assembly is movably connected to the mounting component and includes two jaws for clamping screws. The rotary driver is connected to the mounting component and the clamping assembly, and is used to drive the clamping assembly to rotate relative to the mounting component, synchronously rotating the screw. The electric screwdriver is connected to the mounting component and is used to drive the screw to rotate.

[0034] In the above embodiments, the screw is held by a gripper, and the gripping assembly is driven to rotate by a rotary driver, which simultaneously drives the screw to rotate, so as to adjust the angle of the screw so that the screw can adapt to the angle of the screw hole for feeding. This helps to improve the accuracy of screw screwing into the screw hole. Then, the screw is tightened by an electric screwdriver to realize the function of screw tightening device to lock the screw on the product.

[0035] Some embodiments of this application will now be described with reference to the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0036] In some embodiments, please refer to Figures 1 to 4 This application provides a screw-tightening device 10, including a moving mechanism (not shown), a mounting member 11, a clamping assembly 12, a rotary driver 13, and an electric screwdriver 14. The mounting member 11 is connected to the moving mechanism, and the clamping assembly 12 is movably disposed on the mounting member 11, including two grippers 121. The rotary driver 13 is connected to the mounting member 11 and also to the clamping assembly 12. The electric screwdriver 14 is connected to the mounting member 11 and is located on one side of all the grippers 121.

[0037] When screws need to be tightened on product 30, the moving mechanism drives the mounting member 11 to move, which in turn moves the clamping assembly 12 so that the two jaws 121 clamp the nut 41 of the screw 40, thus enabling the screw tightening device 10 to acquire the screw 40. The mounting member 11 then moves the clamping assembly 12 closer to product 30, so that the clamping assembly 12 releases the screw 40 into the screw hole 31 of product 30. At the same time, the rotary driver 13 drives the clamping assembly 12 to rotate relative to the mounting member 11, and synchronously drives the jaws 121 and the screw 40 to rotate, so as to adjust the angle of the screw 40 relative to the mounting member 11 and product 30, so that the screw 40 can avoid obstacles above the screw hole 31 of product 30. The clamping assembly 12 then moves the jaws 121 and the screw 40 further closer to product 30, so that part of the screw 40 enters the screw hole 31.

[0038] Once part of the screw 40 enters the screw hole 31, the rotary driver 13 drives the clamping assembly 12 to rotate and reset, and synchronously drives the screw 40 to rotate, thereby reducing the angle between the axis of the screw 40 and the axis of the screw hole 31. Compared with the method of using a vacuum sleeve to obtain the screw 40, clamping the screw 40 with the jaws 121 and adjusting the angle of the screw 40 helps to reduce the risk of interference between the vacuum sleeve and obstacles above the screw hole 31 of the product 30, and helps the end of the screw 40 to smoothly enter the screw hole 31 of the product 30.

[0039] When the end of the screw 40 enters the screw hole 31 of the product 30, the two jaws 121 loosen the nut 41 of the screw 40, and the electric screwdriver 14 moves between the two jaws 121 and acts on the screw 40 to screw the screw 40 into the product 30, thereby realizing the function of the screw tightening device 10 to accurately tighten the screws on the product 30.

[0040] It is understandable that the screw 40 is rotated by the gripper 121 so that the screw tightening device 10 can adapt to screw holes 31 at different angles for feeding and tightening the screw 40.

[0041] When it is necessary to remove the screw 40 on the product 30, similar to the steps described above, the electric screwdriver 14 unscrews the screw 40 from the product 30, the two jaws 121 clamp the nut 41 of the screw 40, the rotary driver 13 drives the clamping assembly 12 to rotate, and simultaneously drives the jaws 121 and the screw 40 to rotate, so as to adjust the angle of the screw 40, thereby allowing the screw 40 to avoid the obstacles above the screw hole 31 of the product 30, which is conducive to the screw 40 moving away from the product 30, thus realizing the function of the screw-tightening device 10 to remove the screw 40 on the product 30.

[0042] In some embodiments, the moving mechanism is a robotic arm device or a multi-axis robotic arm.

[0043] In some embodiments, please refer to Figure 1 and Figure 3 The electric screwdriver 14 and all the grippers 121 are distributed along the Z-axis direction, and the two grippers 121 are arranged opposite each other along the X-axis direction. The rotation axis of the clamping assembly 12 is parallel to the X-axis direction, and the Z-axis, Y-axis and X-axis intersect each other.

[0044] Furthermore, the Z-axis, Y-axis, and X-axis are perpendicular to each other.

[0045] In some embodiments, the positive direction of the Z-axis is the upward direction of gravity.

[0046] In other embodiments, the Z-axis intersects the direction of gravity.

[0047] In some embodiments, please refer to Figure 3The clamping assembly 12 includes a clamping cylinder 122 connected to two grippers 121. The clamping cylinder 122 drives the two grippers 121 to separate or close, thereby clamping or releasing the screw 40. Along the Y-axis, the clamping cylinder 122 has two opposing sides. The grippers 121 are located on one side of the clamping cylinder 122. A rotary driver 13 is movably connected to the other side of the clamping cylinder 122 away from the grippers 121. The two sides of the clamping cylinder 122 are rotatably connected to the mounting component 11. The clamping cylinder 122 is connected to the mounting component 11 via its middle section. The rotary driver 13 drives the clamping cylinder 122 to rotate, which in turn drives the grippers 121 to rotate, thus enabling the grippers 121 to rotate the screw 40.

[0048] In some embodiments, when the electric screwdriver 14 screws the screw 40 into the product 30, the two jaws 121 contact the nut 41 of the screw 40 but do not apply force to the nut 41, or the two jaws 121 separate from the nut 41. This allows the two jaws 121 to guide the nut 41 moving along the Z-axis, which helps improve the accuracy of the electric screwdriver 14 in screwing the screw 40 into the product 30.

[0049] In some embodiments, please refer to Figure 4 Each jaw 121 is provided with a groove 1211, which is located on the side of the corresponding jaw 121 facing the other jaw 121 along the X-axis. When the two jaws 121 clamp the nut 41 of the screw 40, the grooves 1211 of the two jaws 121 respectively accommodate part of the nut 41 to limit the nut 41, reduce the risk of the screw 40 moving relative to the jaws 121, and help improve the stability of the jaws 121 clamping the screw 40.

[0050] In some embodiments, please refer to Figure 4 Each gripper 121 also includes a bevel 1212, which is one side wall of the groove 1211. The bevel 1212 of each gripper 121 faces the electric screwdriver 14 and the other gripper 121 respectively. When it is necessary to remove the screw 40 on the product 30, the two grippers 121 move closer together so that the bevel 1212 can be inserted between the nut 41 of the screw 40 and the screw hole 31. By moving the two grippers 121 closer together, the bevel 1212 applies a force towards the electric screwdriver 14 to the nut 41 of the loosened screw 40, thereby achieving the function of the grippers 121 lifting the screw 40 and helping to separate the screw 40 from the product 30. It is understandable that not only when removing the screws 40 from the product 30, but also when the screw tightening device 10 obtains the screws 40 from the outside to the product 30, the inclined surface 1212 applies a force toward the electric screwdriver 14 to the nut 41 of the obtained screws 40, thereby achieving the function of the gripper 121 lifting the screws 40, all of which help the gripper 121 to hold the screws 40.

[0051] During the process of screwing the screw 40 into the product 30 by the screw tightening device 10, the jaws 121 guide the nut 41. The electric screwdriver 14 gradually screws the screw 40 into the product 30 until the nut 41 of the screw 40 contacts the inclined surface 1212. The electric screwdriver 14 applies a force along the X-axis to the inclined surface 1212 through the nut 41 and simultaneously pushes the two jaws 121 to separate, so that the nut 41 of the screw 40 can get closer to the product 30. This realizes the function of the jaws 121 automatically avoiding the movement of the nut 41 of the screw 40 towards the product 30.

[0052] Understandably, when the nut 41 of the screw 40 contacts the inclined surface 1212, the two inclined surfaces 1212 limit the nut 41, thereby reducing the risk of the screw 40 tilting relative to the screw hole 31 of the product 30, and helping to improve the accuracy of the screw 40 being screwed into the product 30.

[0053] In some embodiments, please refer to Figure 4 Each gripper 121 includes an upper part 1213 and a lower part 1214, which are located on both sides of the groove 1211 along the Z-axis direction. From the positive direction of the Z-axis to the negative direction of the Z-axis, the upper part 1213, the groove 1211, and the lower part 1214 are distributed sequentially. Along the X-axis direction, the distance from the lower part 1214 of each gripper 121 to the other gripper 121 is greater than the distance from the upper part 1213 to the other gripper 121. Thus, during the process of the screw tightening device 10 tightening the screw 40 into the product 30, the lower part 1214 can be moved away from the stud 42 of the screw 40 relative to the upper part 1213 (when there is a slope 1212, the slope 1212 is away from the screw 40), thereby reducing the risk of the lower part 1214 of the gripper 121 contacting the stud 42 of the screw 40 and clamping the screw 40.

[0054] In some embodiments, please refer to Figure 1 and Figure 5 The screw-tightening device 10 also includes a third moving component 17, which is disposed on the mounting member 11. The third moving component 17 is connected to the electric screwdriver 14 and the clamping component 12, respectively. The third moving component 17 is configured to synchronously drive the electric screwdriver 14 and the clamping component 12 to move relative to the mounting member 11 along the Z-axis direction. By moving the electric screwdriver 14 and the clamping component 12 through the third moving component 17, the electric screwdriver 14 and the clamping component 12 can move closer to the product 30, thereby reducing the risk of interference between the mounting member 11 or other components and the product 30. This enables the gripper 121 to load and unload the product 30 and the electric screwdriver 14 to tighten screws on the product 30.

[0055] In some embodiments, please refer to Figure 1 and Figure 5The third moving component 17 includes a third moving driver 171, a third slide rail 172, and a third slider 173. The third slide rail 172 is connected to the mounting component 11 and extends along the Z-axis. The third slider 173 is slidably connected to the third slide rail 172. The rotary driver 13, the electric screwdriver 14, and the clamping assembly 12 are respectively connected to the third slider 173. The fixed end of the third moving driver 171 is connected to the mounting component 11, and the telescopic end of the third moving driver 171 is connected to the third slider 173. The third moving driver 171 drives the third slider 173 to slide along the Z-axis on the third slide rail 172, and simultaneously drives the electric screwdriver 14 and the clamping assembly 12 to move, thereby realizing the function of the third moving component 17 driving the electric screwdriver 14 and the clamping assembly 12 to move relative to the mounting component 11.

[0056] In some embodiments, please refer to Figure 1 and Figure 5 The screw-tightening device 10 includes a second moving component 16, which is disposed on the mounting member 11 and connected to the clamping component 12. The second moving component 16 is configured to drive the clamping component 12 to move relative to the mounting member 11 and the electric screwdriver 14 along the Z-axis direction, and simultaneously drive the jaws 121 and the screw 40 to move relative to the electric screwdriver 14, so as to adjust the distance between the jaws 121 and the electric screwdriver 14 in the Z-axis direction, thereby enabling the electric screwdriver 14 to act on the screw 40 between the two jaws 121 and drive the screw 40 to rotate.

[0057] In some embodiments, please refer to Figure 1 and Figure 5 When the screw-tightening device 10 includes a third moving component 17, the clamping component 12 and the rotary driver 13 are connected to the third moving component 17 via the second moving component 16.

[0058] In some embodiments, please refer to Figure 1 and Figure 5 The second moving component 16 includes a second moving driver 161, a second slide rail 162, and a second slider 163. The second slide rail 162 is connected to the third moving component 17 and extends along the Z-axis. The second slider 163 is slidably connected to the second slide rail 162. The rotary driver 13 and the clamping component 12 are respectively connected to the second slider 163. The fixed end of the second moving driver 161 is connected to the third moving component 17, and the telescopic end of the second moving driver 161 is connected to the second slider 163. The second moving driver 161 drives the second slider 163 to slide along the Z-axis on the second slide rail 162, and simultaneously drives the rotary driver 13 and the clamping component 12 to move, thereby realizing the function of the second moving component 16 driving the rotary driver 13 and the clamping component 12 to move relative to the electric screwdriver 14.

[0059] Understandably, when the third motion driver 171 drives the third slider 173 to move in the negative direction of the Z-axis, the second motion driver 161 drives the second slider 163 to move in the positive direction of the Z-axis, so as to reduce the distance between the electric screwdriver 14 and the jaw 121 and enable the electric screwdriver 14 to screw the screw 40 into the product 30.

[0060] In some embodiments, when the axis of the electric screwdriver 14 is not collinear with the axis of the screw hole 31, the screw-tightening device 10 further includes a first moving component 15. The first moving component 15 is disposed on the mounting member 11. The clamping cylinder 122 is connected to the first moving component 15 and rotatably disposed relative to the first moving component 15. The first moving component 15 is also connected to the rotary driver 13. During operation, the first moving component 15 drives the clamping cylinder 122 and the rotary driver 13 to move relative to the mounting member 11 and the electric screwdriver 14 along the Y-axis direction. This causes the clamping cylinder 122 to drive the jaws 121 to move horizontally away from or closer to the electric screwdriver 14. This allows the position of the screw 40 to be adjusted when the jaws 121 rotate the screw 40, ensuring that the electric screwdriver 14 is positioned above the nut 41 of the screw 40. This enables the electric screwdriver 14 to accurately act on the nut 41 of the screw 40, improving the accuracy and stability of the electric screwdriver 14 driving the screw 40 to rotate.

[0061] In some embodiments, when the screw-tightening device 10 includes a third moving component 17 and a second moving component 16, the first moving component 15 is connected to the third moving component 17 or the second moving component 16.

[0062] Exemplarily, the first moving component 15 includes a first moving driver 151, a first slide rail 152, and a first slider 153. The first slide rail 152 is connected to the second moving component 16 and extends along the Y-axis. The first slider 153 is slidably connected to the first slide rail 152. The rotary driver 13 and the clamping component 12 are respectively connected to the first slider 153. The fixed end of the first moving driver 151 is connected to the second moving component 16, and the telescopic end of the first moving driver 151 is connected to the first slider 153. By driving the first slider 153 to slide along the Y-axis on the first slide rail 152 through the first moving driver 151, and simultaneously driving the rotary driver 13 and the clamping component 12 to move, the first moving component 15 drives the rotary driver 13 and the clamping component 12 to move relative to the electric screwdriver 14 in the horizontal direction.

[0063] In some embodiments, the rotary driver 13, the first moving driver 151, the second moving driver 161, or the third moving driver 171 is a power device such as a cylinder or an electric actuator that outputs reciprocating force.

[0064] In some embodiments, when the rotary driver 13 is a cylinder, the side of the clamping cylinder 122 away from the gripper 121 is provided with a slide groove 1221, and the telescopic end of the rotary driver 13 is slidably connected to the slide groove 1221. The rotary driver 13 acts on the side wall of the slide groove 1221 along the Z-axis direction, thereby realizing the function of driving the clamping cylinder 122 to rotate.

[0065] In some embodiments, please refer to Figure 1 and Figure 2 The screw tightening device 10 also includes a measuring component 18, which is located at the connection between the clamping component 12 and the mounting component 11. The measuring component 18 measures the rotation angle of the clamping component 12 to obtain the actual rotation angle of the screw 40, thereby controlling the operation or stop of the rotary driver 13, which helps to improve the accuracy of the rotation angle of the screw 40.

[0066] For example, please refer to Figure 3 The measuring component 18 includes a protractor 181 and a pointer 182. The protractor 181 is located on the first slider 153 and is stationary relative to the first slider 153. The pointer 182 is located on the clamping cylinder 122 and is stationary relative to the clamping cylinder 122. The protractor 181 has a scale, and the center of the protractor 181 is located on the rotation axis of the clamping cylinder 122. The extension direction of the pointer 182 intersects the rotation axis of the clamping cylinder 122. When the rotary driver 13 drives the clamping cylinder 122 to rotate, it synchronously drives the pointer 182 to rotate. The pointer 182 rotates relative to the protractor 181 on the scale side. By reading the scale value on the protractor 181 corresponding to the pointer 182, the rotation angle of the clamping cylinder 122 is obtained, and then the rotation angle of the screw 40 driven by the gripper 121 is obtained. Then, the rotary driver 13 is started or stopped according to the specified rotation angle, thereby realizing the function of the screw tightening device 10 to accurately drive the screw 40 to rotate.

[0067] In other embodiments, the measuring component 18 further includes an encoder and a code disk. The encoder is located on the first slider 153, and the code disk is located on the clamping cylinder 122. The code disk rotates within the sensing area of ​​the encoder. After the encoder detects the rotation of the code disk, it sends a feedback signal to the rotary driver 13, thereby realizing the function of automatically controlling the operation of the rotary driver 13.

[0068] In some embodiments, please refer to Figure 5 The screw-tightening device 10 also includes a limiting mechanism 19, which limits the relative position of the electric screwdriver 14 and the mounting component 11, and / or limits the relative position of the clamping assembly 12 and the mounting component 11. By limiting the electric screwdriver 14 or the clamping assembly 12 through the limiting mechanism 19, the distance that the electric screwdriver 14 or the clamping assembly 12 can move is restricted, thereby reducing the risk of the electric screwdriver 14 or the clamping assembly 12 colliding with other components.

[0069] In some embodiments, the limiting mechanism 19 includes a limiting bolt (not identified) disposed on the mounting member 11. By adjusting the length of the limiting bolt and enabling one end of the limiting bolt to contact the third slider 173, the position of movement of the third slider 173 is limited, thereby limiting the distance that the electric screwdriver 14 and the clamping assembly 12 move relative to the mounting member 11 in the Z-axis direction.

[0070] In some embodiments, a limiting bolt (not shown) is provided on the third slider 173. By adjusting the length of the limiting bolt and making one end of the limiting bolt able to contact the second slider 163, the position of movement of the second slider 163 is limited, thereby limiting the distance that the clamping assembly 12 moves relative to the electric screwdriver 14 in the Z-axis direction.

[0071] In some embodiments, a limiting bolt (not shown) is disposed on the second slider 163. By adjusting the length of the limiting bolt and making one end of the limiting bolt contact the first slider 153, the position of movement of the first slider 153 is limited, thereby limiting the distance that the clamping assembly 12 moves relative to the electric screwdriver 14 in the Y-axis direction.

[0072] In other embodiments, the limiting mechanism 19 further includes a photoelectric position sensor (not labeled), which detects the position of the first slider 153, the second slider 163, or the third slider 173, and sends feedback signals to the first motion driver 151, the second motion driver 161, or the third motion driver 171 corresponding to the slider, so as to control the first motion driver 151, the second motion driver 161, or the third motion driver 171 to work, thereby realizing the function of automatically controlling the position of the first slider 153, the second slider 163, or the third slider 173.

[0073] In other embodiments, the electric screwdriver 14 can also be replaced by a pneumatic screwdriver or other power screwdriver, which can also achieve the function of automatically tightening screws 40.

[0074] In some embodiments, the screw-tightening device 10 can act on threaded fasteners such as screws or bolts that have a shank and a head.

[0075] In some embodiments, the screw-tightening device 10 is used to tighten screws on small, highly integrated electronic products such as mobile phones and computers.

[0076] Furthermore, those skilled in the art should recognize that the above embodiments are merely illustrative of this application and are not intended to limit this application. Any appropriate changes and variations made to the above embodiments within the substantive scope of this application fall within the scope of this application.

Claims

1. A screw-tightening device, characterized in that, include: Installation components; A clamping assembly is movably connected to the mounting component, the clamping assembly including two jaws for clamping screws; A rotary driver is connected to the mounting member and the clamping assembly. The rotary driver is used to drive the clamping assembly to rotate relative to the mounting member and synchronously drive the jaws and the screw to rotate. An electric screwdriver is connected to the mounting component and is used to drive the screw to rotate.

2. The screw-tightening device according to claim 1, characterized in that, Each of the jaws is provided with a groove on the side of the jaw facing the other jaw, the groove being used to receive the nut of the screw.

3. The screw-tightening device according to claim 2, characterized in that, The electric screwdriver is positioned opposite to all the grippers along the Z-axis, and two grippers are positioned opposite to each other along a direction perpendicular to the Z-axis. The electric screwdriver is located between the two grippers along the direction in which the two grippers are positioned opposite each other. Each of the grippers further includes a bevel, which is a sidewall of the groove and is positioned toward the electric screwdriver. The bevel is used to apply a force toward the electric screwdriver to the screw.

4. The screw-tightening device according to claim 1, characterized in that, The electric screwdriver and all the jaws are arranged opposite each other along the Z-axis direction, and the jaws are also used to guide the screw that moves along the Z-axis direction.

5. The screw-tightening device according to claim 1, characterized in that, The clamping assembly includes a clamping cylinder, which is connected to the two grippers and drives the two grippers to separate or close. The clamping cylinder has two opposing sides along the Y-axis, the gripper is located on one side of the clamping cylinder, the rotary driver is movably connected to the other side of the clamping cylinder away from the gripper, and the two sides of the clamping cylinder are rotatably connected to the mounting component. The electric screwdriver and all the grippers are arranged opposite each other along the Z-axis, the axis of rotation of the gripping cylinder is parallel to the X-axis, and the X-axis, Y-axis and Z-axis are perpendicular to each other.

6. The screw-tightening device according to claim 5, characterized in that, The screw-tightening device further includes a first movable component, which is disposed on the mounting component and rotatably connected to the clamping cylinder. The first movable component is also connected to the rotary driver. The first moving component is configured to drive the clamping cylinder and the rotary driver to move relative to the mounting and the electric screwdriver along the Y-axis.

7. The screw-tightening device according to claim 1, characterized in that, The screw-tightening device includes a second moving component, which is disposed on the mounting member and connected to the clamping component. The second moving component is configured to drive the clamping component to move relative to the mounting member and the electric screwdriver, and simultaneously drive the jaws and the screw to move relative to the electric screwdriver. The electric screwdriver and all the grippers are arranged opposite each other along the Z-axis, and the second moving component drives the gripping component to move along the Z-axis.

8. The screw-tightening device according to claim 1, characterized in that, The screw-tightening device includes a third moving component, which is disposed on the mounting component and connected to the electric screwdriver and the clamping component respectively. The third moving component is configured to synchronously drive the electric screwdriver and the clamping component to move relative to the mounting component. The electric screwdriver and all the grippers are arranged opposite each other along the Z-axis, and the third moving component drives the electric screwdriver and the clamping component to move relative to the mounting member along the Z-axis.

9. The screw-tightening device according to claim 1, characterized in that, The screw-tightening device further includes a measuring component, which is located at the connection between the clamping component and the mounting component. The measuring component is used to measure the rotation angle of the clamping component.

10. The screw-tightening device according to claim 1, characterized in that, The screw-tightening device further includes a limiting mechanism for limiting the relative position of the electric screwdriver and the mounting component; and / or The limiting mechanism is used to limit the relative position of the clamping component and the mounting component.

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