Magnetizing screwdriver for automatic assembly of deep-cavity screws

Abstract

The utility model discloses a magnetizing screwdriver for automatic assembly of a deep-cavity screw, which is characterized in that the output end of an electric screwdriver rod is detachably provided with a screwdriver head, the rod body of the electric screwdriver rod is provided with a positive and negative rotation switch for controlling the screwdriver head to rotate, and the output end of the electric screwdriver rod is detachably provided with a coil framework sleeved outside the rod body of the screwdriver head; a coil which is used for magnetizing the screwdriver head and is in circuit connection with a power source in the electric screwdriver rod is arranged in the coil framework, a magnetizing switch used for conducting power-on control on the coil is further arranged on the electric screwdriver rod, and a limiting plate with the cross section of a semi-annular structure is arranged on a rod body of the screwdriver head. The limiting plate and the bit are coaxially arranged, and the limiting plate can axially slide to the front end of the bit along a rod body of the bit; according to the screwdriver bit, the screwdriver bit can efficiently and stably adsorb a screw in a power-on magnetizing mode, the screw can be vertically limited through the limiting plate in the adsorption process, and great convenience is provided for follow-up automatic, rapid and accurate installation of the screw.

Description

Technical Field

[0001] The utility model relates to the technical field of automatic screw assembly, in particular to a magnetic screwdriver used for automatic assembly of deep cavity screws. Background Art

[0002] Electric screwdrivers are widely used in the field of automated production and manufacturing. Most of the electric screwdrivers on the market are non-magnetic screwdrivers. Even if magnetized screwdrivers are required, most of them use magnet bits to provide magnetic force. However, magnet bits not only have weak magnetism, but also their magnetism will weaken during long-term use, which makes it impossible for the magnetic bit to effectively adsorb the screws. Especially in the automated assembly process, the magnetic bit is often required to adsorb the screws and then move them. Since it cannot be effectively adsorbed, the screws will tilt or even fall off during the movement. The falling of the screws seriously affects the installation efficiency, and the tilting of the screws will seriously affect the subsequent installation quality, especially for the installation of deep-cavity hole screws. The tilt of the screws will make it impossible for the screws to be installed in the deep-cavity screw holes. In severe cases, it will also damage the workpiece. Therefore, there is an urgent need for a magnetic screwdriver that can effectively adsorb the screws vertically.

[0003] This seriously affects the subsequent installation. The screws are easily tilted and fall off during the effective adsorption of the screws and the movement of the adsorbed screws. Utility Model Content

[0004] In order to overcome the shortcomings of the background technology, the utility model discloses a magnetic screwdriver for the automated assembly of deep-cavity screws. The utility model can not only enable the screwdriver head to efficiently and stably adsorb the screws by means of power-on magnetization, but also use a limit plate to vertically limit the screws during the adsorption process, thereby providing great convenience for the subsequent automated, rapid and accurate installation of the screws.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A magnetized screwdriver for automated assembly of deep-cavity screws comprises an electric tool rod, a forward and reverse switch and a screwdriver bit, wherein the output end of the electric tool rod is detachably mounted with the screwdriver bit, the rod body of the electric tool rod is provided with a forward and reverse switch for controlling the rotation of the screwdriver bit, the output end of the electric tool rod is detachably mounted with a coil skeleton sleeved on the outside of the rod body of the screwdriver bit, the coil skeleton is provided with a coil for magnetizing the screwdriver bit and circuit-connected to a power supply in the electric tool rod, the electric tool rod is also provided with a magnetizing switch for controlling the power-on of the coil, the rod body of the screwdriver bit is provided with a limit plate with a semi-annular cross-section, the limit plate is coaxially arranged with the screwdriver bit and can slide axially along the rod body of the screwdriver bit to the front end of the screwdriver bit.

[0007] Furthermore, the coil skeleton includes a mounting seat and an extension tube. The mounting seat is a tubular structure. The inner wall of the upper end of the mounting seat is threadedly connected to the electric tool rod. The lower end of the mounting seat is provided with an extension tube connected to the mounting seat. The screwdriver bit passes through the mounting seat and the extension tube. The coil is located in the extension tube and is wound around the rod body of the screwdriver bit.

[0008] Furthermore, an upper mounting plate and a lower mounting plate are respectively provided at the upper and lower ends of the inner cavity of the extension tube; the plate surfaces of the upper and lower mounting plates are provided with through openings adapted to the diameter of the bit; a magnetic conductive tube adapted to the diameter of the bit and coaxially arranged with the through opening is provided between the opposite surfaces of the upper and lower mounting plates; the bit passes through the magnetic conductive tube, the rod body of the bit is attached to the inner wall of the magnetic conductive tube, and the coil is wound around the outer wall of the magnetic conductive tube.

[0009] Furthermore, the side wall of the lower mounting plate is threadably matched with the inner wall of the extension tube, and a rotating handle is provided on the lower surface of the lower mounting plate.

[0010] Furthermore, annular steps for clamping the magnetic conductive tube are provided on the surfaces opposite to the through openings of the upper mounting plate and the lower mounting plate.

[0011] Furthermore, both sides of the rod body of the bit are provided with sliding grooves arranged along the axial direction of the bit, and both sides of the upper end of the inner concave surface of the limiting plate are provided with convex teeth adapted to the sliding grooves.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the screwdriver bit is magnetized by energizing the coil, thereby effectively ensuring the magnetism of the screwdriver bit and providing strong support for the stable adsorption of subsequent screws;

[0013] By setting the limit plate, the screws can be vertically limited during the process of adsorbing and moving the screws and the subsequent installation of the screws, thereby ensuring that the screws are always in a vertical state, which greatly facilitates the subsequent rapid and accurate installation;

[0014] By setting up the magnetic conductive tube, the coil and the screwdriver bit can be isolated, which does not affect the coil's conduction and magnetization of the screwdriver bit, and also avoids the wear of the coil during the rotation of the screwdriver bit.

[0015] By setting a threaded lower mounting plate, it is very convenient for workers to disassemble and replace the magnetic tube and coil, thus providing a stable guarantee for the power-on and magnetization of the screwdriver bit.

[0016] The utility model can not only enable the screwdriver bit to efficiently and stably adsorb the screws by means of power-on and magnetization, but also use the limit plate to vertically limit the screws during the adsorption process, eliminating the influence of the screws skewing during the automatic assembly movement, and can significantly improve the automatic assembly quality, efficiency and assembly qualification rate of deep-cavity screws, effectively avoiding the problems of weak adsorption force of traditional single magnetic screwdriver bits and inability to ensure the verticality of the screws, thereby greatly improving the installation efficiency of the screws. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the coil skeleton assembly state of the utility model;

[0019] Figure 3 This is a schematic diagram of the coil skeleton structure of the utility model;

[0020] Figure 4 It is a schematic diagram of the structure of the limiting arc plate of the utility model.

[0021] In the figure: 1. Electric screwdriver; 2. Forward and reverse switch; 3. Magnetizing switch; 4. Coil frame; 5. Bit; 6. Limit plate; 7. Mounting seat; 8. Upper mounting plate; 9. Magnetic tube; 10. Coil; 11. Extension tube; 12. Lower mounting plate; 13. Slide groove; 14. Through port; 15. Annular step; 16. Turn handle; 17. Protruding teeth. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right", etc. indicating directions or positional relationships, they only correspond to the drawings of the present invention and are for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific direction.

[0023] Please refer to the instruction manual Figure 1-4 , the utility model provides a technical solution:

[0024] Embodiment 1, a magnetized screwdriver for automatic assembly of deep cavity screws, comprising an electric tool rod 1, a forward and reverse switch 2 and a screwdriver bit 5, the output end of the electric tool rod 1 is detachably mounted with the screwdriver bit 5, the rod body of the electric tool rod 1 is provided with a forward and reverse switch 2 for controlling the rotation of the screwdriver bit 5, the output end of the electric tool rod 1 is detachably mounted with a coil skeleton 4 sleeved on the outside of the rod body of the screwdriver bit 5, the coil skeleton 4 is provided with a coil 10 for magnetizing the screwdriver bit 5 and connected to the power supply in the electric tool rod 1 by circuit, specifically, the coil skeleton 4 includes a mounting seat 7 The mounting seat 7 is a tubular structure, the inner wall of the upper end of the mounting seat 7 is threadedly connected to the electric tool rod 1, the lower end of the mounting seat 7 is provided with an extension tube 11 connected to the mounting seat 7, the screwdriver bit 5 passes through the mounting seat 7 and the extension tube 11, the coil 10 is located in the extension tube 11 and is wound around the rod body of the screwdriver bit 5, and the electric tool rod 1 is also provided with a magnetizing switch 3 for controlling the power supply of the coil 10. After turning on the magnetizing switch 3, the coil 10 is energized, and the coil 10 magnetizes the screwdriver bit 5 so that the screwdriver bit 5 generates magnetism and can absorb the screw;

[0025] During the process of screw absorption and movement of the screwdriver bit 5 and the subsequent installation, the screw will often tilt due to movement or touch, thus affecting the subsequent installation. In order to ensure that the screw always remains vertical during the movement and installation process, a limit plate 6 with a semi-annular cross-section is provided on the rod body of the screwdriver bit 5. The limit plate 6 is coaxially arranged with the screwdriver bit 5 and can slide along the axial direction of the rod body of the screwdriver bit 5 to the front end of the screwdriver bit 5. Specifically, both sides of the rod body of the screwdriver bit 5 are provided with a slide groove 13 arranged along the axial direction of the screwdriver bit 5, and both sides of the upper end of the inner concave surface of the limit plate 6 are provided with convex teeth 17 adapted to the slide groove 13. When the screw is absorbed, as the screwdriver bit 5 moves downward, the limit plate 6 contacts the desktop and automatically moves upward along the slide groove 13, thereby avoiding the limit. The plate 6 affects the adsorption of the screw by the end of the screwdriver bit 5. When the screw is adsorbed and moved, the limit plate 6 slides downward along the slide groove 13 to the front of the screwdriver bit 5 due to the influence of its own gravity. Since the limit plate 6 is a concave arc structure, the screw can pass through the limit block of the limit plate 6, effectively ensuring that it is always in a vertical state during the movement. During installation, the limit plate 6 can guide the screw vertically to ensure that the screw is accurately installed vertically. As the screw is installed into the deep cavity hole, the limit plate 6 touches the outer edge of the deep cavity hole and then rises along the slide groove 13, which will not affect the installation of the screw. During the automated assembly process, you only need to install the magnetic screwdriver on the robot arm, and turn on the magnetic switch 3 to achieve automated assembly of the screw.

[0026] In the second embodiment, although the coil 10 is wound around the rod body of the screwdriver bit 5, the screwdriver bit 5 can be energized and magnetized. However, during normal use, the coil 10 is exposed to the outside and is easy to wear, and the rotation of the screwdriver bit 5 will produce friction loss with the coil 10. In order to improve the service life of the magnetized screwdriver, the upper and lower ends of the inner cavity of the extension tube 11 are respectively provided with an upper mounting plate 8 and a lower mounting plate 12, and the plate surfaces of the upper mounting plate 8 and the lower mounting plate 12 are provided with a through hole 14 that is adapted to the diameter of the screwdriver bit 5. A magnetic conductive tube 9 that is adapted to the diameter of the screwdriver bit 5 and is coaxially arranged with the through hole 14 is provided between the opposing surfaces of the upper mounting plate 8 and the lower mounting plate 12. The screwdriver bit 5 passes through the magnetic conductive tube 9, and the rod body of the screwdriver bit 5 is attached to the inner wall of the magnetic conductive tube 9. The coil 10 is wound around the outer wall of the magnetic conductive tube 9. The arrangement of the magnetic conductive tube 9 not only does not affect the energization and magnetization of the screwdriver bit 5, but also protects the coil 10.

[0027] Embodiment three, in order to facilitate daily inspection and maintenance of the magnetized screwdriver, especially the inspection and replacement of the coil 10 in the coil frame 4, the side wall of the lower mounting plate 12 is threadedly matched with the inner wall of the extension tube 11, and a turning handle 16 is provided on the lower surface of the lower mounting plate 12. After removing the lower mounting plate 12 by rotating the turning handle 16, the staff can easily and conveniently inspect and replace the magnetic tube 9 and the coil 10. In order to facilitate the precise installation of the magnetic tube 9 and the coil 10 after inspection and replacement, annular steps 15 for clamping the magnetic tube 9 are provided on the opposite surfaces of the through openings 14 of the upper mounting plate 8 and the lower mounting plate 12. After inserting the upper end of the magnetic tube 9 wrapped with the coil 10 into the annular step 15 on the lower surface of the upper mounting plate 8, the lower mounting plate 12 is installed to ensure the precise installation of the magnetic tube 9.

[0028] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A magnetic screwdriver for automatic assembly of deep cavity screws, comprising an electric tool bar (1), a forward and reverse switch (2) and a screwdriver bit (5), wherein the screwdriver bit (5) is detachably mounted on the output end of the electric tool bar (1), and the forward and reverse switch (2) for controlling the rotation of the screwdriver bit (5) is provided on the rod body of the electric tool bar (1), characterized in that: The output end of the electric tool rod (1) is detachably mounted with a coil frame (4) sleeved on the outside of the rod body of the screwdriver bit (5); a coil (10) for magnetizing the screwdriver bit (5) and connected to the power supply in the electric tool rod (1) is arranged in the coil frame (4); a magnetizing switch (3) for controlling the power supply of the coil (10) is also arranged on the electric tool rod (1); a limit plate (6) having a semi-annular cross section is arranged on the rod body of the screwdriver bit (5); the limit plate (6) is coaxially arranged with the screwdriver bit (5) and can slide along the axial direction of the rod body of the screwdriver bit (5) to the front end of the screwdriver bit (5).

2. A magnetic screwdriver for automated assembly of deep cavity screws according to claim 1, characterized in that: The coil skeleton (4) comprises a mounting seat (7) and an extension tube (11); the mounting seat (7) is a tubular structure; the inner wall of the upper end of the mounting seat (7) is threadedly connected to the electric tool rod (1); the lower end of the mounting seat (7) is provided with an extension tube (11) connected to the mounting seat (7); the screwdriver bit (5) passes through the mounting seat (7) and the extension tube (11); the coil (10) is located in the extension tube (11) and is wound around the rod body of the screwdriver bit (5).

3. A magnetic screwdriver for automated assembly of deep cavity screws according to claim 2, characterized in that: An upper mounting plate (8) and a lower mounting plate (12) are respectively provided at the upper end and the lower end of the inner cavity of the extension tube (11); the plate surfaces of the upper mounting plate (8) and the lower mounting plate (12) are both provided with a through hole (14) matching the diameter of the screwdriver bit (5); a magnetic conductive tube (9) matching the diameter of the screwdriver bit (5) and coaxially arranged with the through hole (14) is provided between the opposite surfaces of the upper mounting plate (8) and the lower mounting plate (12); the screwdriver bit (5) passes through the magnetic conductive tube (9), and the rod body of the screwdriver bit (5) is attached to the inner wall of the magnetic conductive tube (9); and the coil (10) is wound around the outer wall of the magnetic conductive tube (9).

4. A magnetic screwdriver for automated assembly of deep cavity screws according to claim 3, characterized in that: The side wall of the lower mounting plate (12) is threadably matched with the inner wall of the extension tube (11), and a rotating handle (16) is provided on the lower surface of the lower mounting plate (12).

5. The magnetic screwdriver for automatic assembly of deep cavity screws according to claim 4, characterized in that: Annular steps (15) for clamping and placing the magnetic conductive tube (9) are provided on the opposite surfaces of the through openings (14) of the upper mounting plate (8) and the lower mounting plate (12).

6. The magnetic screwdriver for automatic assembly of deep cavity screws according to claim 1, characterized in that: Both sides of the rod body of the screwdriver bit (5) are provided with a slide groove (13) arranged along the axial direction of the screwdriver bit (5), and both sides of the upper end of the inner concave surface of the limiting plate (6) are provided with convex teeth (17) matched with the slide groove (13).

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