A screw fastening positioning anti-skewing device

Abstract

This invention provides a screw fastening positioning anti-skewing device, including a sleeve, a screw barrel for storing screws, and a screwdriver. The bottom of the sleeve is a sleeve outlet. The screwdriver can rotate in the sleeve via a rotating assembly and slide along the length of the sleeve. A discharge cylinder is provided at the bottom of the sleeve, with an outlet channel in the center. The screwdriver tip at the bottom of the screwdriver can pass through the outlet channel and extend out of the sleeve outlet. The bottom end of the screw barrel corresponds to the outlet channel. An anti-skewing mechanism is provided on the wall of the outlet channel inside the discharge cylinder. When the fixing sleeve is fitted onto the nut and moves it downwards, the fixing sleeve compresses the upper annular air bladder. Excess gas in the upper annular air bladder flows to the lower annular air bladder, causing it to contact the screw stud. This ensures that the screw stud remains vertical during the downward movement of the outlet channel and when the stud protrudes from the sleeve outlet, facilitating screw alignment with the target object.

Description

Technical Field

[0001] This invention relates to the field of screw fastening technology, specifically to a screw fastening positioning and anti-skewing device. Background Technology

[0002] With the development of industrial modernization, more and more products require screw fastening, making screw fastening machines an indispensable component in production. Most products require a certain number of screws, and the traditional method of hand-tightening is generally used when assembling these screws, which wastes a lot of manpower and resources and results in low work efficiency.

[0003] Later, with the rapid development of science and technology, screw-tightening machine tools such as electric screwdrivers and pneumatic screwdrivers gradually emerged, replacing manual tightening methods, improving work efficiency, and reducing the workload of workers tightening screws.

[0004] Existing screw fastening machines feed screws to the outlet channel at the bottom of the screwdriver via a feeding pipe. Because the screw has a large diameter nut at the top and a small diameter stud at the bottom, and the top of the nut is mostly arc-shaped with a small side contact surface, the stud is prone to tilting when passing through or exiting the outlet channel due to the small contact surface between the nut and the outlet channel. This causes the screw to fail to align with the target, which is a defect. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this invention provides a screw fastening positioning and anti-skewing device, which solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a screw fastening positioning anti-skewing device, comprising a sleeve, a screw barrel for storing screws, and a screwdriver. The bottom of the sleeve is a sleeve outlet. The screwdriver can rotate within the sleeve via a rotating assembly and slide along the length of the sleeve. A discharge cylinder is provided at the bottom of the sleeve, with an outlet channel in the center. The screwdriver head at the bottom of the screwdriver can pass through the outlet channel and extend out of the sleeve outlet. The bottom end of the screw barrel corresponds to the outlet channel. An anti-skewing mechanism is provided on the wall of the outlet channel inside the discharge cylinder. The anti-tilt mechanism includes several annular airbags, air storage airbags, and an air pressure regulating component. The air pressure regulating component, air storage airbags, and annular airbags are connected in sequence. Several annular grooves are equally spaced along the length of the outlet channel on the discharge cylinder. The annular airbags are housed in the annular grooves, with one end protruding into the outlet channel. An annular fixing sleeve is provided outside the screwdriver head. The outer diameter of the fixing sleeve is smaller than the inner diameter of the outlet channel, and its inner diameter is larger than the outer diameter of the screw cap. When the fixing sleeve is fitted on the screw cap and squeezes the annular airbag located at the top, the annular airbag located at the bottom presses against the screw stud.

[0009] Preferably, the air pressure regulating assembly includes a three-way pipe, a screw, a piston, and an inflation valve. One end of the three-way pipe is connected to an air storage bag, the inflation valve is located on the second end of the three-way pipe, the piston is slidably adapted to the third end of the three-way pipe, and the screw is threadedly connected to the third end of the three-way pipe, with its bottom end pivotally connected to the piston.

[0010] Preferably, an annular retaining ring is provided at the outlet of the sleeve, wherein the inner diameter of the retaining ring is smaller than the outer diameter of the fixed sleeve and larger than the outer diameter of the screw cap.

[0011] Preferably, the screw barrel has two rows of feed channels, and the screw barrel outlet is provided with a stepping feed mechanism, which can sequentially drop one screw at a time from the two rows of feed channels.

[0012] Preferably, the stepping feeding mechanism includes an annular I-shaped base with an I-shaped cross-section and an upper and lower turntable pivotally connected to the top and bottom of the I-shaped base. The middle part of the I-shaped base is provided with two material passages corresponding to the material channel. The upper and lower turntables are respectively provided with a feed hole and a discharge hole corresponding to the material passages. The feed hole and the discharge hole are circumferentially spaced 180° apart. A double-headed motor coaxially connected to the upper and lower turntables is provided inside the I-shaped base.

[0013] Preferably, the top of the discharge cylinder has an arc-shaped opening that is wider at the top and narrower at the bottom at the entrance of the outlet channel.

[0014] Preferably, the rotating assembly includes a rotating shaft, a guide sleeve, and a guide rail. The screwdriver passes through the rotating shaft and is fixedly connected to it. The rotating shaft is rotatably connected to the inner ring of the guide sleeve via a bearing. The guide rail is arranged on the inner wall of the sleeve along the length direction of the sleeve. The guide sleeve has a groove that matches the guide rail.

[0015] (III) Beneficial Effects

[0016] This invention provides a screw fastening positioning and anti-skewing device. It has the following beneficial effects:

[0017] 1. This screw locking positioning anti-skewing device, when the screw initially enters the outlet channel, the upper nut of the screw is mounted on the top annular air bladder, and the lower annular air bladder surrounds the screw stud but does not contact it. When the fixing sleeve is put on the nut and moves it downward, the fixing sleeve squeezes the upper annular air bladder, and the excess gas in the upper annular air bladder flows to the lower annular air bladder so that it contacts the screw stud. This ensures that the screw stud is always in a vertical state during the downward movement of the outlet channel and when the stud is exposed at the sleeve outlet, making it easier for the screw to align with the target object. Attached Figure Description

[0018] Figure 1 This is an external isometric view of the present invention;

[0019] Figure 2 This is a half-section isometric view of the present invention;

[0020] Figure 3 This is a schematic diagram of the anti-tilt mechanism of the present invention;

[0021] Figure 4 This is a schematic diagram of the stepping feeding mechanism of the present invention;

[0022] Figure 5 This is a diagram showing the initial state of the screw entering the outlet channel according to the present invention;

[0023] Figure 6 This is a diagram showing the state of the fixed sleeve compressing the annular airbag according to the present invention.

[0024] In the diagram: 1. Sleeve, 2. Screw barrel, 3. Screwdriver, 4. Anti-skewing mechanism, 5. Handle, 6. Rotary shaft, 7. Guide sleeve, 8. Guide rail, 9. Stepping feeding mechanism, 10. Discharge cylinder, 11. Sleeve outlet, 12. Arc-shaped opening, 13. Fixing plate, 14. Top plate, 15. Button, 16. Material channel, 17. Fixing sleeve, 18. Guide groove, 19. Spring, 20. Screw, 21. Retaining ring, 31. Screwdriver head, 41. Ring groove, 42. Ring airbag, 43. Air storage bag, 44. T-pipe, 45. Screw, 46. Piston, 47. Inflation valve, 91. I-shaped seat, 92. Upper turntable, 93. Lower turntable, 95. Material channel, 96. Feed hole, 97. Discharge hole. Detailed Implementation

[0025] This invention provides a screw fastening positioning and anti-skewing device, such as... Figure 1-6 As shown, it includes a sleeve 1, a screw barrel 2 for storing screws 20, and a screwdriver 3. The bottom of the sleeve 1 is a sleeve outlet 11. The screwdriver 3 can rotate in the sleeve 1 via a rotating assembly and can slide along the length of the sleeve 1.

[0026] The rotating assembly includes a rotating shaft 6, a guide sleeve 7, and a guide rail 8. The screwdriver 3 passes through and is fixedly connected to the rotating shaft 6. The rotating shaft 6 is rotatably connected to the inner ring of the guide sleeve 7 via a bearing. When the screwdriver 3 rotates, it drives the rotating shaft 6 to rotate on the guide sleeve 7. The guide rail 8 is arranged along the length of the sleeve 1 on the inner wall of the sleeve 1, and the guide sleeve 7 has a groove adapted to the guide rail 8. When a screw 20 needs to be loaded, the screwdriver 3 is pulled upwards, and the guide sleeve 7 moves axially along the sleeve 1, causing the screwdriver head 31 of the screwdriver 3 to disengage from the outlet of the screw barrel 2.

[0027] The bottom of the sleeve 1 is provided with a discharge cylinder 10, with an outlet channel in the center of the discharge cylinder 10. The screwdriver head 31 at the bottom of the screwdriver 3 can pass through the outlet channel and extend out of the sleeve outlet 11. The bottom end of the screw barrel 2 corresponds to the outlet channel, which is slightly larger than the diameter of the nut at the top of the screw 20. The top of the discharge cylinder 10, located at the entrance of the outlet channel, has an arc-shaped opening 12 that is wider at the top and narrower at the bottom. The arc-shaped opening 12 facilitates the guide and sliding of the screw 20 and prevents the screw 20 from tilting and getting stuck at the entrance.

[0028] like Figure 2 As shown, the screwdriver 3 has a polygonal handle 5 at its top for rotating the screwdriver 3. The bottom end of the screwdriver 3 can pass through the outlet channel and extend out of the socket outlet 11.

[0029] like Figure 2 As shown, the bottom end of the screw barrel 2 corresponds to the arc-shaped opening 12. Two rows of material channels 16 are provided inside the screw barrel 2. A stepping feeding mechanism 9 is provided at the outlet of the screw barrel 2. The stepping feeding mechanism 9 can drop one screw 20 at a time in the two rows of material channels 16.

[0030] like Figure 2 and Figure 4 As shown, the stepping feeding mechanism 9 includes an annular I-shaped seat 91 with an I-shaped cross-section, and an upper turntable 92 and a lower turntable 93 pivotally connected to the top and bottom of the I-shaped seat 91. The I-shaped seat 91 is fixed inside the screw cylinder 2 at the discharge port. Two material passages 95 corresponding to the material channel 16 are provided in the middle of the I-shaped seat 91. Figure 4To ensure visibility that the feed channel 95 is not closed, it is preferable that the feed channel 95 is a through-tube, allowing the screw 20 to pass smoothly through it and preventing it from getting stuck. The upper turntable 92 and lower turntable 93 are respectively provided with a feed hole 96 and a discharge hole 97 corresponding to the feed channel 95, spaced 180° circumferentially. A dual-head motor, coaxially connected to the upper turntable 92 and lower turntable 93, is installed inside the I-shaped base 91. When the feed hole 96 connects to feed channel A 16 and feed channel A 95, feed channel B 16 is closed, at which point a screw 20 falls. Simultaneously, the discharge port 96 connects to feed channel B 95, causing the screw 20 in feed channel B 95 to fall into the outlet channel. When the dual-head motor drives the rotation 180°, the feed hole 96 connects to the B material channel 16, and the discharge hole 17 connects to the B material channel 16, thus achieving the feeding of one screw 20 each time.

[0031] A fixing plate 13 is fixedly installed inside the sleeve 1. A button 15 for controlling the dual-head motor is located at the bottom of the fixing plate 13. A top plate 14 corresponding to the button 15 is installed on the screwdriver 3. When the top plate 14 contacts the button 15, the bottom end of the screwdriver 3 is positioned above the discharge port of the screw barrel 2. Figure 2 The image shows the state of the top plate 14 when the trigger button 15 is activated. To prevent the screw 20 from falling, the screwdriver head 31 of the screwdriver 3 remains within the outlet channel. A battery for powering the dual-head motor is also provided on the socket 1.

[0032] like Figure 3 As shown, an anti-tilting mechanism 4 is provided on the wall of the outlet channel inside the discharge cylinder 10. The anti-tilting mechanism 4 includes several annular airbags 42, an air storage bag 43, and an air pressure regulating component. The air pressure regulating component is connected to the air storage bag 43, and the several annular airbags 42 are connected to the air storage bag 43. Several annular grooves 41 are evenly spaced along the length of the outlet channel on the discharge cylinder 10. The annular airbags 42 are housed in the annular grooves 41, and the annular airbags 42 are adhered to the inner wall of the annular grooves 41. One end of the annular airbag 42 protrudes into the outlet channel, and the protruding part is arc-shaped. An annular fixing sleeve 17 is provided on the outside of the screwdriver head 31. The outer diameter of the fixing sleeve 17 is smaller than the inner diameter of the outlet channel, and its inner diameter is larger than the outer diameter of the screw 20 cap.

[0033] Normally, the lower end of the retaining sleeve 17 is lower than the height of the screwdriver head 31. To ensure that the retaining sleeve 17 remains in the outlet channel after the screwdriver head 31 extends out of the sleeve outlet 11, an annular retaining ring 21 is provided at the sleeve outlet 11. The inner diameter of the retaining ring 21 is smaller than the outer diameter of the retaining sleeve 17, but larger than the outer diameter of the screw 20 cap. Simultaneously, a guide groove 18 is formed along the length of the screwdriver 3's shaft. The upper end of the retaining sleeve 17 slides vertically within the guide groove 18. A spring 19 is provided between the top of the retaining sleeve 17 and the top of the guide groove 18. When the retaining sleeve 17 descends and contacts the retaining ring 21, the retaining sleeve 17 stops on the retaining ring 21, while the screwdriver head 31 and screw 20 continue to pass through the retaining ring 21.

[0034] like Figure 5 As shown, when screw 20 initially enters the outlet channel, the upper nut of screw 20 is mounted on the top annular airbag 42, while the lower annular airbag 42 surrounds the stud of screw 20 but does not contact it; Figure 6 As shown, in this embodiment, the length of the fixing sleeve 17 is approximately the length of four annular airbags 42. When the fixing sleeve 17 is fitted onto the top cap of the screw 20 and positioned above the four annular airbags 42, excess gas in the upper four annular airbags 42 flows to the lower annular airbag 42, causing it to contact the stud of the screw 20. The lower annular airbag 42 presses against the stud of the screw 20, ensuring that the stud of the screw 20 remains vertical during its descent through the outlet channel and when it protrudes from the sleeve outlet 11, facilitating the alignment of the screw 20 with the target object.

[0035] like Figure 4 As shown, to adjust the gas volume within the annular airbag 42 according to screws 20 of different sizes, the air pressure regulating assembly includes a three-way pipe 44, a screw 45, a piston 46, and an inflation valve 47. One end of the three-way pipe 44 is connected to the air reservoir 43. The inflation valve 47 is located on the second end of the three-way pipe 44 and is used to inflate the air reservoir 43; it is normally in a closed state. The piston 46 is slidably fitted inside the third end of the three-way pipe 44. The screw 45 is threadedly connected to the third end of the three-way pipe 44, and its bottom end is pivotally connected to the piston 46. When the screw 45 rotates, it can drive the piston 46 to move piston-like within the three-way pipe 44, changing the air pressure inside the air reservoir 43, thereby adjusting the distance by which the annular airbag 42 extends out of the annular groove 41. By adjusting the screw 45, when the screw 20 initially enters the outlet channel, the annular airbag 42 surrounds the stud of the screw 20 but does not make contact. However, after the fixing sleeve 17 continuously squeezes the four annular airbags 42, the lower annular airbag 42 presses against the stud of the screw 20. It should be noted that the annular airbag 42 just makes contact with the stud of the screw 20, and the annular airbag 42 does not exert a large squeezing force on the screw 20, and the friction between the two is small.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A screw locking positioning and anti-inclination device, comprising a sleeve (1), a screw cartridge (2) for storing a screw (20), a screwdriver (3), a bottom of the sleeve (1) being a sleeve outlet (11), the screwdriver (3) rotating in the sleeve (1) through a rotating assembly and sliding along a length direction of the sleeve (1), a bottom of the sleeve (1) being provided with a discharge cartridge (10), a center of the discharge cartridge (10) being an outlet passage, a screwdriver bit (31) at a bottom end of the screwdriver (3) penetrating through the outlet passage and extending out of the sleeve outlet (11), a bottom end of the screw cartridge (2) corresponding to the outlet passage, characterized in that: The outlet passage wall in the discharge cylinder (10) is provided with an anti-inclination mechanism (4), the anti-inclination mechanism (4) comprises a plurality of annular air bags (42), an air storage bag (43) and a gas pressure adjusting assembly, the gas pressure adjusting assembly, the air storage bag (43) and the annular air bag (42) are sequentially connected, a plurality of annular grooves (41) are equally spaced along the length direction of the outlet passage on the discharge cylinder (10), the annular air bag (42) is accommodated in the annular groove (41), and one end is exposed to the outlet passage, a screwdriver bit (31) is provided with an annular fixing sleeve (17) outside, the outer diameter of the fixing sleeve (17) is smaller than the inner diameter of the outlet passage, and the inner diameter of the fixing sleeve (17) is larger than the outer diameter of the screw (20) top cap, when the fixing sleeve (17) is sleeved on the screw (20) top cap and extrudes the annular air bag (42) located at the upper part, the annular air bag (42) located at the lower part abuts against the screw (20) stud. ​ 2. The screw locking and positioning anti-inclination device according to claim 1, characterized in that: The gas pressure adjusting assembly comprises a tee pipe (44), a screw rod (45), a piston (46) and an inflation valve (47), one end of the tee pipe (44) is connected with the air storage bag (43), the inflation valve (47) is arranged on the second end of the tee pipe (44), the piston (46) is slidably fitted in the third end pipe of the tee pipe (44), and the screw rod (45) is threadedly connected to the third end of the tee pipe (44) and is pivotally connected to the piston (46) at the bottom end.

3. The screw locking and positioning anti-inclination device according to claim 1, characterized in that: The sleeve outlet (11) is provided with an annular retaining ring (21), the inner diameter of the retaining ring (21) is smaller than the outer diameter of the fixing sleeve (17), and is larger than the outer diameter of the screw (20) top cap.

4. The screw locking and positioning anti-inclination device according to claim 1, characterized in that: The screw cylinder (2) is provided with two rows of material channels (16), and the discharge opening of the screw cylinder (2) is provided with a step feeding mechanism (9), which can step by step drop one screw from the two rows of material channels (16).

5. The screw locking and positioning anti-inclination device according to claim 4, characterized in that: The step feeding mechanism (9) comprises an annular I-shaped seat (91) with an I-shaped cross section, and upper and lower rotating discs (92) and (93) pivotally connected to the top and bottom of the I-shaped seat (91), the middle of the I-shaped seat (91) is provided with two material passages (95) corresponding to the material channels (16), the upper and lower rotating discs (92) and (93) are respectively provided with inlet holes (96) and outlet holes (97) corresponding to the material passages (95), the inlet holes (96) and the outlet holes (97) are annularly spaced 180°, and the I-shaped seat (91) is provided with a double-head motor coaxially connected with the upper and lower rotating discs (92) and (93).

6. The screw locking and positioning anti-inclination device according to claim 1, characterized in that: The top of the discharge cylinder (10) is an arc-shaped opening (12) with a large upper part and a small lower part at the inlet of the outlet passage.

7. The screw locking and positioning anti-inclination device according to claim 1, characterized in that: The rotating assembly comprises a rotating shaft (6), a guide sleeve (7) and a guide rail (8), the screwdriver (3) passes through the rotating shaft (6) and is fixedly connected thereto, the rotating shaft (6) is rotatably connected to the inner ring of the guide sleeve (7) through a bearing, the guide rail (8) is arranged on the inner wall of the sleeve (1) along the length direction of the sleeve (1), and the guide sleeve (7) is provided with a sliding groove matched with the guide rail (8).

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