A screw driver with automatic bit changing

Abstract

The utility model discloses a kind of screwdrivers of automatic replacement of batch head, belong to the technical field of automated assembly, including support seat, further include: quick-change mechanism, screw locking mechanism and size measuring mechanism, the quick-change mechanism is installed in support seat downside, the screw locking mechanism is installed in support seat right side, the size measuring mechanism is installed in support seat left side, the quick-change mechanism includes: quick-change device female head, quick-change device subhead, trapezoidal plate, ball bearing, connecting seat, batch head and sleeve, the quick-change device female head is fixedly installed in support seat lower left side, the quick-change device subhead is clamped in quick-change device female head downside, the trapezoidal plate is fixedly installed in quick-change device subhead downside, the ball bearing outer ring is fixedly installed in trapezoidal plate right side, the connecting seat is fixedly installed in ball bearing inner ring. By the above mode, the utility model can be quickly replaced to adapt to the adsorption and screwing of screw of different sizes, the screwing depth of screw can be detected.

Description

Technical Field

[0001] This utility model relates to the field of automated assembly technology, specifically a screwdriver with automatic bit changing. Background Technology

[0002] A screwdriver is a device used to tighten screws. Currently, many products use a variety of screws for fastening, requiring multiple screwdrivers to tighten different screws, or a single screwdriver to tighten multiple screws by changing different bits. Screwdrivers usually have a quick bit changing mechanism for rapid bit replacement. Some products, for various reasons, use aluminum or other screws that cannot be gripped magnetically, and usually require negative pressure adsorption to grip the screws. Since different screw sizes have different head diameters, the size of the adsorption end needs to be adjusted to match the screw size.

[0003] Chinese patent CN215701286U discloses a handheld automatic screwdriver, comprising an electric screwdriver, a screwdriver bit, a nitrogen spring, a flexible rubber tube, an M4x8 screw, an elastic PU ring, a clamping block, and a guide tip. The fixed base houses the screwdriver bit, a nitrogen spring arranged parallel to the bit, and a flexible rubber tube fitted to one end of the bit. One end of the bit is inserted into one end of the fixed base, and the other end of the bit is fitted with the electric screwdriver. The electric screwdriver has two parallel fixing frames, and the electric screwdriver is fixedly connected to the nitrogen spring through the two fixing frames. The other end of the fixed base has an external spring... The device includes a PU rubber ring, a clamping block inside the fixing base, an Mx screw passing through the clamping block, and a guide nozzle integrally fixed to the fixing base at the other end. The central axes of the electric screwdriver, the screwdriver bit, the elastic PU rubber ring, the clamping block, and the guide nozzle are coincident, with one end of the screwdriver bit connected to the electric screwdriver and the other end connected to the fixing base. The fixing base is also connected to the guide nozzle. The elastic PU rubber ring is sleeved on the fixing base, and the inner wall size of the elastic PU rubber ring matches and is fixed to the outer wall size of the fixing base. The cavity formed by the fixing base and the soft rubber tube has a Y-shaped structure.

[0004] However, the technical solution of this patent has the following problems:

[0005] This patent cannot quickly adapt to the suction and screwing of screws of different sizes, nor can it detect the screwing depth.

[0006] Therefore, those skilled in the art have provided a screwdriver with automatic bit changing to solve the above problems. Utility Model Content

[0007] The purpose of this invention is to provide a screwdriver with automatic bit changing to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A screwdriver with automatic bit changing includes a support base, and further includes: a quick-change mechanism, a screw-locking mechanism, and a size measuring mechanism. The quick-change mechanism is installed on the lower side of the support base, the screw-locking mechanism is installed on the right side of the support base, and the size measuring mechanism is installed on the left side of the support base. The quick-change mechanism includes: a quick-change female head, a quick-change female head, a trapezoidal plate, a ball bearing, a connecting seat, a bit, and a sleeve. The quick-change female head is fixedly installed on the lower left side of the support base, and the quick-change female head is snapped onto the lower side of the quick-change female head. The trapezoidal plate... The ball bearing outer ring is fixedly installed on the right side of the trapezoidal plate, the connecting seat is fixedly installed on the inner ring of the ball bearing, the bit is fixedly installed on the connecting seat, the bit has an external hexagonal protrusion on its upper side, the sleeve is fixedly installed on the screw-locking mechanism, the sleeve has an internal hexagonal slot on its lower side, the external hexagonal protrusion is located in the internal hexagonal slot, and the quick-change device female head and quick-change device female head can be set as the robot quick-change QCA100 quick-change device produced by Suzhou Xiruig Robotics Technology Co., Ltd.;

[0010] Furthermore, the quick-change mechanism also includes a floating component, which is mounted on the trapezoidal plate;

[0011] Furthermore, the floating assembly includes: a linear bearing, a guide rod, a sliding plate, a first spring, and an extension tube. Two linear bearings are fixedly mounted on the trapezoidal plate. The guide rod is slidably connected to the linear bearings. The sliding plate is fixedly mounted on the lower side of the guide rod. The first spring is slidably connected to the guide rod. One end of the first spring is in close contact with the linear bearing, and the other end of the first spring is in close contact with the sliding plate. The extension tube is fixedly mounted on the lower side of the sliding plate. A limit ring is fixedly mounted on the upper side of the guide rod. The end of the bit away from the connecting seat is slidably connected inside the extension tube.

[0012] Furthermore, the floating component also includes a negative pressure component, which is installed on the left side of the sliding plate;

[0013] Furthermore, the negative pressure assembly includes: a pneumatic connector and a connecting pipe, one end of the pneumatic connector being fixedly connected to a sliding plate, the output end of the pneumatic connector being fixedly connected to the upper side of an extension pipe, one end of the connecting pipe being fixedly connected to the end of the pneumatic connector away from the extension pipe, and the end of the connecting pipe away from the pneumatic connector being fixedly connected to the quick-change device head.

[0014] Furthermore, the screw-locking mechanism includes: a gearbox and a servo motor. The gearbox housing is fixedly installed on the right side of the support base, the servo motor housing is fixedly installed on the upper side of the gearbox housing, the output shaft of the servo motor is fixedly connected to the input end of the gearbox, and the sleeve is fixedly installed on the output end of the gearbox.

[0015] Furthermore, the dimension measuring mechanism includes: a fixed vertical plate, sliders, a guide rail, a sliding vertical plate, and a contact displacement sensor. The fixed vertical plate is fixedly installed on the left side of the support base. The two sliders are slidably connected to the left side of the fixed vertical plate. The guide rail is slidably connected to the sliders. The sliding vertical plate is fixedly installed at the end of the guide rail away from the sliders. The contact displacement sensor is fixedly installed on the upper side of the sliding vertical plate, and the detection end of the contact displacement sensor is in close contact with the upper side of the fixed vertical plate.

[0016] Furthermore, the dimension measuring mechanism also includes an elastic component, which is mounted on a fixed vertical plate. The elastic component includes a connecting block, a limiting rod, and a second spring. The two connecting blocks are respectively fixedly mounted on the front and rear sides of the fixed vertical plate. The limiting rod is fixedly mounted on the connecting block. The end of the limiting rod away from the connecting block is slidably connected to the sliding vertical plate. The second spring is slidably connected to the limiting rod. One end of the second spring is in close contact with the sliding vertical plate, and the other end of the second spring is in close contact with the connecting block.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model allows for quick disassembly and installation of the quick-change device through the quick-change device female head and quick-change device female head. During installation, the external hexagonal protrusion on the upper side of the bit is aligned with the internal hexagonal slot on the lower side of the sleeve. Then, the quick-change device female head and quick-change device female head are quickly connected, so that the extension tube and bit can be replaced as a whole to accommodate the adsorption and screwing of screws of different sizes.

[0018] 2. A sliding vertical plate is fixedly connected to an external robotic arm. Driven by the external robotic arm, the sliding vertical plate moves downward, causing the guide rail to move downward as well. This displacement change between the guide rail and the slider brings the connecting block and limit rod on the fixed vertical plate on the slider closer to the sliding vertical plate. The second spring undergoes elastic deformation, and the downward movement of the sliding vertical plate causes the contact displacement sensor to move downward as well. The detection end of the contact displacement sensor is in close contact with the upper part of the fixed vertical plate. When the contact displacement sensor moves downward and contacts the fixed vertical plate, it can detect the downward displacement of the fixed vertical plate. The downward movement of the fixed vertical plate causes the support base to move downward, which in turn causes the quick-change mechanism and the screw-locking mechanism to move downward, tightening the screw. The screw insertion depth is determined by the displacement data detected by the contact displacement sensor. Attached Figure Description

[0019] Figure 1This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a front view of the present utility model;

[0021] Figure 3 This is a partial structural diagram of the quick-change mechanism of this utility model. Figure 1 ;

[0022] Figure 4 This is a partial structural diagram of the quick-change mechanism of this utility model. Figure 2 ;

[0023] Figure 5 This is a partial structural schematic diagram of the dimension measuring mechanism of this utility model.

[0024] In the diagram: 1. Support base; 2. Quick-change mechanism; 21. Quick-change female head; 22. Quick-change female head; 23. Trapezoidal plate; 24. Ball bearing; 25. Connecting seat; 26. Screwdriver bit; 27. Sleeve; 28. External hexagonal protrusion; 29. ​​Internal hexagonal slot; 210. Linear bearing; 211. Guide rod; 212. Sliding plate; 213. First spring; 214. Extension tube; 215. Limiting ring; 216. Pneumatic connector; 217. Connecting tube; 3. Screw locking mechanism; 31. Gearbox; 32. Servo motor; 4. Dimension measuring mechanism; 41. Fixed vertical plate; 42. Slider; 43. Guide rail; 44. Sliding vertical plate; 45. Contact displacement sensor; 46. Connecting block; 47. Limiting rod; 48. Second spring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0027] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-5A screwdriver with automatic bit changing mechanism includes a support base 1, and further includes: a quick-change mechanism 2, a screw-locking mechanism 3, and a size measuring mechanism 4. The quick-change mechanism 2 is installed on the lower side of the support base 1, the screw-locking mechanism 3 is installed on the right side of the support base 1, and the size measuring mechanism 4 is installed on the left side of the support base 1. The quick-change mechanism 2 includes: a quick-change female head 21, a quick-change female head 22, a trapezoidal plate 23, a ball bearing 24, a connecting seat 25, a bit 26, and a sleeve 27. The quick-change female head 21 is fixedly installed on the lower left side of the support base 1, and the quick-change female head 22 is snapped onto the lower side of the quick-change female head 21. The trapezoidal plate 23... 3. The ball bearing 24 is fixedly installed on the lower side of the quick-change device head 22. The outer ring of the ball bearing 24 is fixedly installed on the right side of the trapezoidal plate 23. The connecting seat 25 is fixedly installed on the inner ring of the ball bearing 24. The bit 26 is fixedly installed on the connecting seat 25. The bit 26 has an external hexagonal protrusion 28 on its upper side. The sleeve 27 is fixedly installed on the screw locking mechanism 3. The sleeve 27 has an internal hexagonal slot 29 on its lower side. The external hexagonal protrusion 28 is located in the internal hexagonal slot 29. The quick-change device head 21 and the quick-change device head 22 can be set as the robot quick-change QCA100 quick-change device produced by Suzhou Xireig Robotics Technology Co., Ltd.

[0028] The rotation of the sleeve 27 of the quick-change mechanism 2 drives the screwdriver bit 26 to rotate. The rotation of the screwdriver bit 26 tightens the screw. The ball bearing 24 and the connecting seat 25 are used to help fix the screwdriver bit 26 and make it rotate smoothly. The quick-change device can be quickly disassembled and installed through the quick-change device female head 21 and quick-change device female head 22. During installation, align the external hexagonal protrusion 28 on the upper side of the screwdriver bit 26 with the internal hexagonal slot 29 on the lower side of the sleeve 27, and then quickly connect the quick-change device female head 21 and quick-change device female head 22.

[0029] The quick-change mechanism 2 further includes a floating component, which is mounted on the trapezoidal plate 23.

[0030] The floating assembly includes: a linear bearing 210, a guide rod 211, a sliding plate 212, a first spring 213, and an extension tube 214. Two linear bearings 210 are fixedly mounted on a trapezoidal plate 23. The guide rod 211 is slidably connected to the linear bearings 210. The sliding plate 212 is fixedly mounted on the lower side of the guide rod 211. The first spring 213 is slidably connected to the guide rod 211. One end of the first spring 213 is in close contact with the linear bearing 210, and the other end of the first spring 213 is in close contact with the sliding plate 212. The extension tube 214 is fixedly mounted on the lower side of the sliding plate 212. A limit ring 215 is fixedly mounted on the upper side of the guide rod 211. The end of the bit 26 away from the connecting seat 25 is slidably connected inside the extension tube 214.

[0031] The floating assembly moves downwards as a whole, and the extension tube 214 moves to the screw feeder position. The screw is attracted by negative pressure, and only the head of the screw is located in the bit 26 position inside the extension tube 214. The bit 26 rotates, causing the screw to rotate and tighten the screw.

[0032] The floating component also includes a negative pressure component, which is installed on the left side of the sliding plate 212.

[0033] The negative pressure assembly includes a pneumatic connector 216 and a connecting pipe 217. One end of the pneumatic connector 216 is fixedly connected to the sliding plate 212, and the output end of the pneumatic connector 216 is fixedly connected to the upper side of the extension pipe 214. One end of the connecting pipe 217 is fixedly connected to the end of the pneumatic connector 216 away from the extension pipe 214, and the end of the connecting pipe 217 away from the pneumatic connector 216 is fixedly connected to the quick-change device head 22.

[0034] The quick-change device female head 21 and quick-change device female head 22 are connected to the external air supply equipment and the negative pressure equipment. The external air supply equipment supplies air to them, and the external negative pressure equipment generates negative pressure, which is transmitted through the connecting pipe 217 to the pneumatic connector 216. Then, it is transmitted through the pneumatic connector 216 to the extension pipe 214. The extension pipe 214 moves to the screw feeder position, and the screw is attracted by the negative pressure. Only the head of the screw is located in the bit 26 position inside the extension pipe 214. The extension pipe 214 and the bit 26 can be replaced as a whole to accommodate the attraction and screwing of screws of different sizes.

[0035] Example 2: In some embodiments, such as Figures 1-5 In a preferred embodiment of the present invention, the screw-locking mechanism 3 includes a gearbox 31 and a servo motor 32. The outer shell of the gearbox 31 is fixedly installed on the right side of the support base 1, the outer shell of the servo motor 32 is fixedly installed on the upper side of the outer shell of the gearbox 31, the output shaft of the servo motor 32 is fixedly connected to the input end of the gearbox 31, and the sleeve 27 is fixedly installed on the output end of the gearbox 31.

[0036] The servo motor 32 of the screw-locking mechanism 3 rotates, causing the output end of the gearbox 31 to rotate. The rotation of the output end of the gearbox 31 drives the sleeve 27 to rotate, and the rotation of the sleeve 27 drives the bit 26 to rotate, thus tightening the screw.

[0037] The dimension measuring mechanism 4 includes: a fixed vertical plate 41, sliders 42, a guide rail 43, a sliding vertical plate 44, and a contact displacement sensor 45. The fixed vertical plate 41 is fixedly installed on the left side of the support base 1. The two sliders 42 are slidably connected to the left side of the fixed vertical plate 41. The guide rail 43 is slidably connected to the sliders 42. The sliding vertical plate 44 is fixedly installed at the end of the guide rail 43 away from the sliders 42. The contact displacement sensor 45 is fixedly installed on the upper side of the sliding vertical plate 44, and the detection end of the contact displacement sensor 45 is in close contact with the upper side of the fixed vertical plate 41.

[0038] The dimension measuring mechanism 4 further includes an elastic component, which is mounted on a fixed vertical plate 41. The elastic component includes a connecting block 46, a limiting rod 47, and a second spring 48. The two connecting blocks 46 are respectively fixedly mounted on the front and rear sides of the fixed vertical plate 41. The limiting rod 47 is fixedly mounted on the connecting block 46. One end of the limiting rod 47 away from the connecting block 46 is slidably connected to a sliding vertical plate 44. The second spring 48 is slidably connected to the limiting rod 47. One end of the second spring 48 is in close contact with the sliding vertical plate 44, and the other end of the second spring 48 is in close contact with the connecting block 46.

[0039] The sliding vertical plate 44 is fixedly connected to the external robotic arm. Driven by the external robotic arm, the sliding vertical plate 44 moves downward, causing the guide rail 43 to move downward. This displacement change between the guide rail 43 and the slider 42 causes the connecting block 46 and the limiting rod 47 on the fixed vertical plate 41 on the slider 42 to approach the sliding vertical plate 44. The second spring 48 undergoes elastic deformation. The downward movement of the sliding vertical plate 44 causes the contact displacement sensor 45 to move downward. The detection end of the contact displacement sensor 45 is in close contact with the upper side of the fixed vertical plate 41. When the contact displacement sensor 45 moves downward and contacts the fixed vertical plate 41, it can detect the downward displacement of the fixed vertical plate 41. The downward movement of the fixed vertical plate 41 causes the support base 1 to move downward. The downward movement of the support base 1 causes the quick-change mechanism 2 and the screw-locking mechanism 3 to move downward, tightening the screw. The screw insertion depth is determined by the displacement data detected by the contact displacement sensor 45.

[0040] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A screwdriver with automatic bit changing, comprising a support base (1), characterized in that, Also includes: The quick-change mechanism (2), the screw-locking mechanism (3), and the dimension measuring mechanism (4) are provided. The quick-change mechanism (2) is installed on the lower side of the support base (1), the screw-locking mechanism (3) is installed on the right side of the support base (1), and the dimension measuring mechanism (4) is installed on the left side of the support base (1). The quick-change mechanism (2) includes: a quick-change female head (21), a quick-change female head (22), a trapezoidal plate (23), a ball bearing (24), a connecting seat (25), a screwdriver bit (26), and a sleeve (27). The quick-change female head (21) is fixedly installed on the lower left side of the support base (1), and the quick-change female head (22) is snapped into place. On the lower side of the quick-change device female head (21), the trapezoidal plate (23) is fixedly installed on the lower side of the quick-change device female head (22), the outer ring of the ball bearing (24) is fixedly installed on the right side of the trapezoidal plate (23), the connecting seat (25) is fixedly installed on the inner ring of the ball bearing (24), the bit (26) is fixedly installed on the connecting seat (25), the bit (26) is provided with an external hexagonal protrusion (28) on the upper side, the sleeve (27) is fixedly installed on the screw locking mechanism (3), the sleeve (27) is provided with an internal hexagonal slot (29) on the lower side, and the external hexagonal protrusion (28) is located in the internal hexagonal slot (29).

2. The screwdriver with automatic bit changing according to claim 1, characterized in that, The quick-change mechanism (2) further includes a floating component, which is mounted on the trapezoidal plate (23).

3. The screwdriver with automatic bit changing according to claim 2, characterized in that, The floating assembly includes: a linear bearing (210), a guide rod (211), a sliding plate (212), a first spring (213), and an extension tube (214). Two linear bearings (210) are fixedly mounted on a trapezoidal plate (23). The guide rod (211) is slidably connected to the linear bearings (210). The sliding plate (212) is fixedly mounted on the lower side of the guide rod (211). The first spring (213) is slidably connected to the guide rod (211). One end of the first spring (213) is in close contact with the linear bearing (210), and the other end of the first spring (213) is in close contact with the sliding plate (212). The extension tube (214) is fixedly mounted on the lower side of the sliding plate (212). A limit ring (215) is fixedly mounted on the upper side of the guide rod (211). The end of the bit (26) away from the connecting seat (25) is slidably connected inside the extension tube (214).

4. The screwdriver with automatic bit changing according to claim 3, characterized in that, The floating component further includes a negative pressure component, which is installed on the left side of the sliding plate (212).

5. The screwdriver with automatic bit changing according to claim 4, characterized in that, The screw-locking mechanism (3) includes a gearbox (31) and a servo motor (32). The outer shell of the gearbox (31) is fixedly installed on the right side of the support base (1). The outer shell of the servo motor (32) is fixedly installed on the upper side of the outer shell of the gearbox (31). The output shaft of the servo motor (32) is fixedly connected to the input end of the gearbox (31). The sleeve (27) is fixedly installed on the output end of the gearbox (31).

6. The screwdriver with automatic bit changing according to claim 1, characterized in that, The size measuring mechanism (4) includes: a fixed vertical plate (41), a slider (42), a guide rail (43), a sliding vertical plate (44), and a contact displacement sensor (45). The fixed vertical plate (41) is fixedly installed on the left side of the support base (1). The two sliders (42) are slidably connected to the left side of the fixed vertical plate (41). The guide rail (43) is slidably connected to the sliders (42). The sliding vertical plate (44) is fixedly installed at the end of the guide rail (43) away from the sliders (42). The contact displacement sensor (45) is fixedly installed on the upper side of the sliding vertical plate (44). The detection end of the contact displacement sensor (45) is in close contact with the upper side of the fixed vertical plate (41).

7. The screwdriver with automatic bit changing according to claim 6, characterized in that, The size measuring mechanism (4) further includes an elastic component, which is mounted on a fixed vertical plate (41).

8. The screwdriver with automatic bit changing according to claim 7, characterized in that, The elastic component includes: a connecting block (46), a limiting rod (47), and a second spring (48). The two connecting blocks (46) are respectively fixedly installed on the front and rear sides of the fixed vertical plate (41). The limiting rod (47) is fixedly installed on the connecting block (46). The end of the limiting rod (47) away from the connecting block (46) is slidably connected to the sliding vertical plate (44). The second spring (48) is slidably connected to the limiting rod (47). One end of the second spring (48) is in close contact with the sliding vertical plate (44), and the other end of the second spring (48) is in close contact with the connecting block (46).

Images