Screw feeder

Abstract

The invention provides a screw feeder which comprises a feeding device, the feeding device comprises a hopper and a feeding assembly, the feeding assembly has a circulating feeding process which is sequentially in a material taking state, a feeding butt joint state and a waiting state, and the feeding assembly is provided with a feeding groove which is obliquely arranged and used for feeding; when the feeding assembly is in the material taking state, the feeding groove extends into the material bearing position of the containing cavity to take materials. When the feeding assembly is in the feeding butt joint state, the feeding assembly drives the feeding groove to move to the position where the feeding groove is in butt joint with the downstream station. And when the feeding assembly is in the waiting state, the feeding groove is static relative to the downstream station, so that the screws in the feeding groove slide to the downstream station. According to the screw feeder, the inclined feeding groove is integrated in the feeding assembly, and the waiting state is set between the material taking state and the feeding butt joint state, so that the screws have sufficient time to slide down to a downstream station, and the problem that in the prior art, the risk of malposition of the screws is high in the conveying process of the screw feeder is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of automated equipment, and more particularly, to a screw feeder. Background Art

[0002] Currently, in modern manufacturing, automated assembly lines have become an important means to improve production efficiency and reduce labor costs. Among them, the screw tightening station is an indispensable part of the automated assembly line. Traditional screw feeders mainly rely on manual operation, that is, screws are manually placed on the electric screwdriver or tightening tool one by one. However, with the development of automation technology, mechanical screw feeders have gradually been introduced to achieve automatic screw supply. Such feeders usually include a hopper for storing a large number of screws and a set of complex mechanical devices for orderly delivering the screws from the hopper to the front end of the tightening tool. The introduction of mechanical screw feeders has significantly improved the screw feeding speed and the degree of automation of the assembly line, reducing the dependence on labor.

[0003] However, despite the many conveniences brought by mechanical screw feeders, there are still some technical problems in actual use, especially regarding the risk of screw misalignment during transportation. During the process of lifting screws by the lifting device to the linear vibrating track plate, due to the small size and irregular shape of the screws, the screws are prone to attitude changes under the influence of mechanical vibration or movement inertia, deviating from the preset transportation track, resulting in screw jams or inaccurate delivery to the head of the electric screwdriver, thus affecting the normal operation of the entire assembly line. In addition, at the moment when the screws transition from the lifting device to the linear vibrating track plate, the screws may jump due to high-speed movement, further exacerbating the risk of misalignment. These problems not only reduce the working efficiency of the feeder but also may cause the production line to stop, increase production costs, and have a negative impact on production quality and production progress. Therefore, how to design a screw feeder that can effectively reduce screw misalignment during feeding has become a key challenge in the current design of screw feeders. Summary of the Invention

[0004] The main object of the present invention is to provide a screw feeder to solve the technical problem of the high risk of screw misalignment in the feeding device of the existing screw feeder during transportation.

[0005] To achieve the above object, according to one aspect of the present invention, a screw feeder is provided, which includes a feeding device comprising a hopper and a feeding assembly. The hopper encloses a receiving cavity for containing screws. The feeding assembly is movably arranged in the receiving cavity. The feeding assembly has a cyclic feeding process that sequentially includes a material taking state, a feeding docking state, and a waiting state. The feeding assembly has a feeding groove that is inclined for feeding. When the feeding assembly is in the material taking state, the feeding groove extends into the material receiving position of the receiving cavity to take materials. When the feeding assembly is in the feeding docking state, the feeding assembly drives the feeding groove to move to a position where it is docked with the downstream station. When the feeding assembly is in the waiting state, the feeding groove is stationary relative to the downstream station, so that the screws in the feeding groove slide to the downstream station.

[0006] Further, the feeding assembly includes a lifting assembly arranged in the receiving cavity. A feeding groove is arranged on the lifting assembly, and the lifting assembly is arranged to be liftable. A crank structure includes a fixed end, a swinging end, and a slider. The swinging end swings relative to the fixed end along a preset direction, and the slider is arranged on the swinging end. A slide rail is arranged on the lifting assembly, and the slider is arranged in the slide rail and slidably cooperates with the slide rail so that the feeding assembly is in the material taking state, the feeding docking state, or the waiting state.

[0007] Further, the lifting assembly includes a lifting plate and a lifting connecting rod. A feeding groove is arranged on the lifting plate, and the lifting connecting rod is arranged at one end of the lifting plate close to the crank structure. The slide rail is arranged on the lifting connecting rod. The slide rail includes a first horizontal section arranged in the horizontal direction. When the slider slides from one end of the first horizontal section to the other end, the lifting plate is in the material taking state. When the slider slides from the other end of the first horizontal section to one end, the lifting plate is in the feeding docking state.

[0008] Further, the screw feeder further includes a control module. The control module is signal-connected to the driving device to control the movement or stillness of the swinging end connected to the driving device. When the swinging end drives the slider to slide to the end of the first horizontal section, the control module controls the swinging end to be stationary so that the lifting plate is in the waiting state.

[0009] Further, the slide rail further includes an arc section arranged at one end of the first horizontal section. The radius of the circle corresponding to the arc section is equal to the length corresponding to the distance between the fixed end and the slider, so that when the slider slides in the arc section, the feeding groove on the lifting assembly is stationary relative to the downstream station.

[0010] Further, the slide rail further includes a second horizontal section arranged at the end of the arc section far from the first horizontal section. When the slider moves along the direction away from the arc section on the second horizontal section, the lifting plate is in the material taking state. When the slider moves along the direction close to the arc section on the second horizontal section, the lifting plate is in the feeding docking state.

[0011] Further, the feeding chute has a first end and a second end. The height of the first end relative to the horizontal plane is higher than that of the second end relative to the horizontal plane. The included angle between the feeding chute and the horizontal plane is α. The screw feeder includes: a feeding device, comprising a hopper and a feeding component. The hopper encloses to form a receiving cavity for containing screws. The feeding component is movably arranged in the receiving cavity. The feeding component has a cyclic feeding process that sequentially includes a material taking state, a feeding docking state, and a waiting state. The feeding component has a feeding chute that is inclined for feeding. When the feeding component is in the material taking state, the feeding chute extends into the material receiving position of the receiving cavity to take materials. When the feeding component is in the feeding docking state, the feeding component drives the feeding chute to move to a position where it is docked with the downstream station. When the feeding component is in the waiting state, the feeding chute is stationary relative to the downstream station so that the screws in the feeding chute slide down to the downstream station.

[0012] Further, the feeding component includes: a lifting component arranged in the receiving cavity. The feeding chute is arranged on the lifting component, and the lifting component is arranged to be liftable; a crank structure, including a fixed end, a swinging end, and a slider. The swinging end swings relative to the fixed end along a preset direction. The slider is arranged on the swinging end. A slide rail is arranged on the lifting component, and the slider is arranged in the slide rail and slidably cooperates with the slide rail so that the feeding component is in the material taking state, the feeding docking state, or the waiting state.

[0013] Further, the lifting component includes a lifting plate and a lifting connecting rod. The feeding chute is arranged on the lifting plate. The lifting connecting rod is arranged at one end of the lifting plate close to the crank structure. The slide rail is arranged on the lifting connecting rod. The slide rail includes a first horizontal section arranged in the horizontal direction. When the slider slides from one end of the first horizontal section to the other end, the lifting plate is in the material taking state. When the slider slides from the other end of the first horizontal section to one end, the lifting plate is in the feeding docking state.

[0014] Further, the screw feeder further includes a control module and a driving device. The control module is signal-connected to the driving device to control the movement or stillness of the swinging end connected to the driving device. When the swinging end drives the slider to slide to the end of the first horizontal section, the control module controls the swinging end to be still so that the lifting plate is in the waiting state.

[0015] Further, the slide rail further includes an arc section arranged at one end of the first horizontal section. The radius of the circle corresponding to the arc section is equal to the length corresponding to the distance between the fixed end and the slider, so that when the slider slides in the arc section, the feeding chute on the lifting component is stationary relative to the downstream station.

[0016] Further, the sliding rail further includes a second horizontal section, which is arranged at one end of the arc section away from the first horizontal section. When the slider moves along the direction away from the arc section on the second horizontal section, the lifting plate is in the material taking state. When the slider moves along the direction close to the arc section on the second horizontal section, the lifting plate is in the feeding docking state.

[0017] Further, the feeding groove has a first end and a second end. The height of the first end relative to the horizontal plane is higher than the height of the second end relative to the horizontal plane. The included angle between the feeding groove and the horizontal plane is α, and α≥65°.

[0018] Further, the screw feeder further includes a conveying device and a distributing device. One end of the conveying device is arranged in the accommodating cavity and is docked with the feeding assembly. The other end of the conveying device is arranged outside the accommodating cavity for conveying the screws on the feeding assembly to the outside of the accommodating cavity. The distributing device is connected to the conveying device. The distributing device includes a feeding end and a discharging end. The feeding end corresponds to the conveying device, and the discharging end corresponds to the electric screwdriver head, so that the screws at the feeding end are conveyed to the discharging end.

[0019] Further, the conveying device includes a track plate, which is arranged on the hopper. The upper end surface of the track plate is provided with a conveying track along the horizontal direction. One end of the conveying track is arranged in the accommodating cavity and is connected to the feeding groove, so that the screws in the feeding groove fall into the conveying track. The other end of the conveying track is connected to the feeding end of the distributing device, so that the screws in the conveying track fall into the feeding end.

[0020] Further, the distributing device includes a distributing assembly. The distributing assembly includes a box body, a driving block and a screw leakage pipe. The box body is connected to the conveying device. The upper end surface of the box body is provided with a feeding end. The driving block is movably arranged in the box body. A screw leakage hole extending along the vertical direction is arranged inside the driving block. The screw leakage hole is selectively communicated with the feeding end. The screw leakage pipe is arranged at the bottom of the box body. One end of the screw leakage pipe is selectively communicated with the screw leakage hole. The other end of the screw leakage pipe extends along a predetermined direction to form a discharging end. A sensor is arranged on the screw leakage pipe for counting the number of screws passing through the screw leakage pipe. A blowing assembly, the blowing assembly is communicated with the screw leakage hole through an air path, and is used for blowing air into the screw leakage hole so that the screws are blown from one end of the screw leakage pipe to the other end.

[0021] Further, the screw feeder further includes a conveying device and a distributing device. One end of the conveying device is arranged in the accommodating cavity and is docked with the feeding assembly. The other end of the conveying device is arranged outside the accommodating cavity for conveying the screws on the feeding assembly to the outside of the accommodating cavity. The distributing device is connected to the conveying device. The distributing device includes a feeding end and a discharging end. The feeding end corresponds to the conveying device, and the discharging end corresponds to the electric screwdriver head, so that the screws at the feeding end are conveyed to the discharging end.

[0022] Further, the conveying device includes an orbital plate disposed on the hopper. The upper end surface of the orbital plate is provided with a conveying track along the horizontal direction. One end of the conveying track is disposed in the accommodating cavity and connected to the feeding chute, so that the screws in the feeding chute fall into the conveying track. The other end of the conveying track is connected to the feeding end of the material distributing device, so that the screws in the conveying track fall into the feeding end.

[0023] Further, the material distributing device includes a material distributing assembly and a blowing assembly. The material distributing assembly includes a box body, a driving block, and a screw leakage tube. The box body is connected to the conveying device. The upper end surface of the box body is provided with a feeding end. The driving block is movably disposed in the box body. A screw leakage hole extending along the vertical direction is provided inside the driving block. The screw leakage hole is selectively communicated with the feeding end. The screw leakage tube is disposed at the bottom of the box body. One end of the screw leakage tube is selectively communicated with the screw leakage hole. The other end of the screw leakage tube extends along a predetermined direction to form a discharging end. A sensor is provided on the screw leakage tube for counting the number of screws passing through the screw leakage tube. The blowing assembly is communicated with the screw leakage hole through an air path and is used for blowing air into the screw leakage hole to blow the screws from one end of the screw leakage tube to the other end.

[0024] Applying the technical solution of the present invention, the accommodating cavity formed by enclosing the hopper of the feeding device is used for storing screws on a large scale, and the feeding chute inside the feeding assembly is a screw conveying channel. The feeding assembly forms a close cooperation relationship with the downstream station by cycling among the material taking state, the feeding docking state, and the waiting state. In the material taking state, the feeding chute extends into the material receiving position of the hopper and efficiently loads the screws into the chute. When reaching the feeding docking state, the feeding assembly drives the feeding chute to accurately move to the downstream station to achieve accurate docking of the screws. Finally, the feeding chute in the waiting state remains stationary to ensure that the screws smoothly slide to the downstream station, reducing the risk of misalignment or jamming caused by dynamic transmission. The inclined setting of the feeding chute utilizes the natural gravity of the screws and does not require additional power, prompting the screws to smoothly slide to the downstream station in the waiting state. By integrating an inclined feeding chute in the feeding assembly and setting a waiting state between the material taking state and the feeding docking state in this application, the screws have sufficient time to slide to the downstream station, effectively solving the problem of high risk of screw misalignment in the screw feeder during the conveying process in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 Shows a front plan schematic view of an embodiment of a screw feeder according to the present invention;

[0027] Figure 2Shows a side plan view of an embodiment of a screw feeder according to the present invention;

[0028] Figure 3 Shows a top view of an embodiment of a screw feeder according to the present invention;

[0029] Figure 4 Shows a plan view of a feeding assembly of an embodiment of a screw feeder according to the present invention;

[0030] Figure 5 Shows a side view of a feeding assembly of an embodiment of a screw feeder according to the present invention;

[0031] Figure 6 Shows a plan view of a lifting plate of an embodiment of a screw feeder according to the present invention;

[0032] Figure 7 Shows a plan view of a lifting link of an embodiment of a screw feeder according to the present invention;

[0033] Figure 8 Shows a front plan view of a crank structure of an embodiment of a screw feeder according to the present invention;

[0034] Figure 9 Shows a side plan view of a crank structure of an embodiment of a screw feeder according to the present invention;

[0035] Figure 10 Shows a front plan view of a track plate of a conveying device of an embodiment of a screw feeder according to the present invention;

[0036] Figure 11 Shows a top view of a track plate of a conveying device of an embodiment of a screw feeder according to the present invention;

[0037] Figure 12 Shows a plan view of a piezoelectric vibrator of a conveying device of an embodiment of a screw feeder according to the present invention;

[0038] Figure 13 Shows a top view of a material separating device of an embodiment of a screw feeder according to the present invention;

[0039] Figure 14 Shows a side partial cross-sectional view of a material separating device of an embodiment of a screw feeder according to the present invention;

[0040] Figure 15 Shows a material separating device of an embodiment of a screw feeder according to the present invention along Figure 14 the cross-sectional view in the direction of G-G in;

[0041] Figure 16 The front plane schematic diagram of the material distribution pulling block of the material distribution device according to an embodiment of the screw feeder of the present invention is shown;

[0042] Figure 17 The side plane schematic diagram of the material pulling block of the material distribution device according to an embodiment of the screw feeder of the present invention is shown;

[0043] Figure 18 The front partial cross-sectional view of the deviation rectifying device according to an embodiment of the screw feeder of the present invention is shown;

[0044] Figure 19 The side partial cross-sectional view of the deviation rectifying device according to an embodiment of the screw feeder of the present invention is shown.

[0045] Among them, the above-mentioned drawings include the following reference numerals:

[0046] 100, base; 200, feeding device; 210, hopper; 211, accommodating cavity; 220, feeding assembly; 221, lifting assembly; 221a, lifting plate; 221a1, feeding groove; 221a11, first end; 221a12, second end; 221b, lifting connecting rod; 221b1, slide rail; 221b11, first horizontal section; 221b12, second horizontal section; 221b13, arc section; 222, crank structure; 222a, fixed end; 222b, swinging end; 222c, slider; 223, driving device; 223a, output end; 300, conveying device; 310, track plate; 311, conveying track; 320, piezoelectric vibrator; 321, top plate; 322, bottom plate; 323, leaf spring; 324, piezoelectric bimorph; 400, material distribution device; 401, feeding end; 402, discharging end; 410, material distribution assembly; 411, box body; 411a, guiding groove; 412, driving block; 412a, nail leakage hole; 413, nail leakage pipe; 414, material distribution pulling block; 414a, guiding block; 414b, supporting groove; 415, material hook; 420, air blowing assembly; 500, deviation rectifying device; 510, movable assembly; 511, brush; 512, rotating shaft; 520, transmission assembly; 521, fixed block; 522, guiding strip. Detailed implementation manners

[0047] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be combined with each other. The present invention will be described in detail below with reference to the drawings and in conjunction with the embodiments.

[0048] As Figures 1 to 19As shown in the figure, an embodiment of the present invention provides a screw feeder, which includes a feeding device 200, comprising a hopper 210 and a feeding component 220. The hopper 210 encloses a receiving cavity 211 for containing screws. The feeding component 220 is movably arranged in the receiving cavity. The feeding component 220 has a cyclic feeding process that sequentially includes a material taking state, a feeding docking state, and a waiting state. The feeding component 220 has a feeding chute 221a1 that is inclined for feeding. When the feeding component 220 is in the material taking state, the feeding chute 221a1 extends into the material receiving position of the receiving cavity 211 to take materials. When the feeding component 220 is in the feeding docking state, the feeding component 220 drives the feeding chute 221a1 to move to a position docked with the downstream station. When the feeding component 220 is in the waiting state, the feeding chute 221a1 is stationary relative to the downstream station, so that the screws in the feeding chute 221a1 slide down to the downstream station.

[0049] By using the screw feeder provided by the embodiment of the present invention, by integrating an inclined feeding chute 221a1 in the feeding component 220 and setting a waiting state between the material taking state and the feeding docking state, the screws have sufficient time to slide down to the downstream station, effectively solving the problem of high risk of screw misalignment in the screw feeder during the conveying process in the prior art.

[0050] In the above embodiment, the receiving cavity formed by enclosing the hopper 210 of the feeding device 200 is used for storing screws on a large scale, and the feeding chute 221a1 inside the feeding component 220 is the screw conveying channel. The feeding component 220 forms a close cooperation relationship with the downstream station by cycling between the material taking state, the feeding docking state, and the waiting state. In the material taking state, the feeding chute 221a1 extends into the material receiving position of the hopper 210, and the cross-sectional shape of the feeding chute 221a1 is set corresponding to the shape of the screw, so that the screws roll into the chute. When reaching the feeding docking state, the feeding component 220 drives the feeding chute 221a1 to accurately move to the downstream station to achieve accurate docking of the screws. Finally, the feeding chute 221a1 in the waiting state remains stationary, ensuring that the screws slide smoothly to the downstream station, reducing the risk of misalignment or jamming caused by dynamic transmission. The inclined setting of the feeding chute 221a1 utilizes the natural gravity of the screws, without additional power, to promote the smooth sliding of the screws in the waiting state.

[0051] In some embodiments, the screw feeder further includes a base 100, and the feeding device 200 is arranged on the base 100. The base 100 provides a stable foundation for the installation and operation of the screw feeder.

[0052] Specifically, as Figure 4 、 Figure 5As shown, the feeding assembly 220 includes a lifting assembly 221 disposed in the accommodating cavity 211. A feeding groove 221a1 is provided on the lifting assembly 221, and the lifting assembly 221 is arranged to be liftable. The crank structure 222 includes a fixed end 222a, a swinging end 222b and a slider 222c. The swinging end 222b swings relative to the fixed end 222a along a preset direction. The slider 222c is disposed on the swinging end 222b. A slide rail 221b1 is provided on the lifting assembly 221, and the slider 222c is disposed in the slide rail 221b1 and slidably engaged with the slide rail 221b1 so that the feeding assembly 220 is in a material taking state, a feeding docking state or a waiting state. The lifting assembly 221 is slidably connected to the crank structure 222. The lifting assembly 221 is disposed in the accommodating cavity 211 and is equipped with a key feeding groove 221a1, which is the conveying channel for the screws to transition from the storage state to the conveying state. The lifting assembly 221 can perform a lifting action, and this dynamic characteristic enables it to reach the screw receiving position in the accommodating cavity 211 in the material taking state, efficiently load the screws into the feeding groove 221a1, and then move to dock with the next working station. The swinging of the swinging end 222b of the crank structure 222 relative to the fixed end 222a along the preset direction, and the setting of the slider 222c on the swinging end 222b provide the necessary driving force for the state conversion of the feeding assembly 220. The slider 222c is embedded in the slide rail 221b1 on the lifting assembly 221, and the sliding fit between the two is the basis for realizing the cycle of the material taking state, the feeding docking state and the waiting state, ensuring that the feeding groove 221a1 can accurately complete the whole process from screw taking to final static screw placing.

[0053] Specifically, as Figure 6 , Figure 7As shown, the lifting assembly 221 includes a lifting plate 221a and lifting linkages 221b. A feeding groove 221a1 is provided on the lifting plate 221a. The lifting linkages 221b are arranged at one end of the lifting plate 221a close to the crank structure 222. A slide rail 221b1 is arranged on the lifting linkages 221b. The slide rail 221b1 includes a first horizontal section 221b11 arranged in the horizontal direction. When the slider 222c slides from one end of the first horizontal section 221b11 to the other end, the lifting plate 221a is in the state of picking up materials. When the slider 222c slides from the other end of the first horizontal section 221b11 to one end, the lifting plate 221a is in the state of feeding butt joint. The synergistic effect among the lifting plate 221a, the lifting linkages 221b, the first horizontal section 221b11 and the slider 222c is the key to realizing the precise picking up and stable feeding of screws. The lifting plate 221a is a core component of the screw feeding path. The lifting linkages 221b are connected to one end of the lifting plate 221a, more specifically, the end close to the crank structure, forming a robotic arm for driving the lifting plate 221a to lift and lower. The first horizontal section 221b11 of the slide rail 221b1 provides a path for the slider 222c to slide in the horizontal direction, which is directly related to the state conversion of the lifting plate 221a. The sliding of the slider 222c on the first horizontal section 221b11 determines two key states of the lifting plate 221a: when the slider 222c slides from one end of the first horizontal section 221b11 to the other end, the lifting plate 221a will descend to the lowest point, and at this time it is in the state of picking up materials, and the screw can enter the feeding groove 221a1; conversely, when the slider 222c slides back to the starting end, the lifting plate 221a will move up to the state of feeding butt joint, ready to accurately convey the screw to the downstream station. This design effectively controls the lifting and lowering of the lifting plate 221a through the reciprocating sliding of the slider 222c on the first horizontal section 221b11 of the slide rail 221b1, and further realizes the precise switching of the feeding groove 221a1 between the states of picking up materials and feeding butt joint.

[0054] Specifically, the screw feeder further includes a control module and a driving device 223. The control module is signal-connected to the driving device 223 to control the movement or stillness of the swing end 222b connected to the driving device 223. When the swing end 222b drives the slider 222c to slide to the end of the first horizontal section 221b11, the control module controls the swing end 222b to be still so that the lifting plate 221a is in a waiting state. The cooperative relationship among the control module, the driving device 223, the swing end 222b, the slider 222c, the first horizontal section 221b11, and the lifting plate 221a is the core mechanism to ensure screw picking, conveying, and smooth release. The control module, as the core of the intelligent control system, is signal-connected to the driving device 223 and controls the action of the driving device 223 by sending instructions, thereby precisely regulating the movement or stillness state of the swing end 222b. The driving device 223 responds to the instructions of the control module and drives the swing end 222b to swing in a preset direction. This swinging action is transmitted to the slider 222c through the crank structure, pushing the slider 222c to slide on the first horizontal section 221b11. The sliding of the slider 222c on the first horizontal section 221b11 is directly related to the lifting and lowering of the lifting plate 221a, and thus affects the position change of the screws in the feeding groove. Particularly crucial is that when the lifting plate 221a rises to the docking position and the slider 222c also correspondingly slides to the end of the first horizontal section 221b11, the control module can keenly detect this state and immediately issue an instruction to make the swing end 222b still, thereby ensuring that the lifting plate 221a is in a waiting state. During the waiting state, the screws in the inclined feeding groove slide smoothly to the downstream station by virtue of their own gravity, avoiding the possible screw misalignment or jamming during the dynamic transmission process.

[0055] In the above embodiment, the driving device 223 includes an output end 223a, and the output end 223a is connected to the fixed end 222a to drive the swing end 222b of the crank structure 222 to swing. The design of the driving device 223 is based on mechanical principles. Through the connection between the output end 223a and the fixed end 222a, the power of the driving device can be converted into the swinging motion of the crank structure 222, thereby driving the lifting assembly 221 to reciprocate up and down to achieve automatic feeding of screws. In the present application, the driving device 223 further includes a DC motor, a flange coupling, a worm and worm gear reducer, and a lifting link mechanism. The DC motor serves as the power source of the driving device 223 to provide an initial rotational torque. Its output shaft is connected to the flange coupling. The flange coupling, as a connecting element, is used to reliably transmit the torque generated by the motor to the subsequent transmission mechanism. Subsequently, the torque is transmitted to the worm and worm gear reducer through the flange coupling. The function of the reducer is to reduce the input speed while increasing the output torque to meet the requirements of the subsequent mechanical structure for low speed and high torque. The worm and worm gear transmission has a self-locking function, which can prevent accidental reverse rotation during the screw feeding process, ensuring the stability and safety of the drive. Immediately afterwards, the decelerated torque is transmitted to the output end 223a through the worm and worm gear reducer, and the output end 223a is connected to the lifting link mechanism. The lifting link mechanism converts the rotational output of the worm and worm gear reducer into the swing of the swing end, realizing the direct conversion from power to function execution.

[0056] Specifically, as Figure 7As shown, the slide rail 221b1 further includes an arc segment 221b13, which is provided at one end of the first horizontal segment 221b11. The radius of the circle corresponding to the arc segment 221b13 is equal to the length corresponding to the distance between the fixed end 222a and the slider 222c, so that when the slider 222c slides within the arc segment 221b13, the feeding groove 221a1 on the lifting assembly 221 is stationary relative to the downstream station. The cooperation mechanism among the slide rail 221b1, the first horizontal segment 221b11, the arc segment 221b13, the fixed end 222a, the slider 222c, the lifting assembly 221 and the feeding groove 221a1 thereon ensures that the screw can be smoothly and accurately docked to the downstream station during the critical conveying stage. The slide rail 221b1 integrates the first horizontal segment 221b11 and the arc segment 221b13. Among them, the arc segment 221b13 is carefully arranged at one end of the first horizontal segment 221b11, and the radius of the corresponding circle is matched with the length corresponding to the distance between the fixed end 222a and the slider 222c. This precise geometric correspondence means that when the slider 222c slides within the arc segment 221b13, the lifting assembly 221 and the feeding groove 221a1 carried thereon will remain stationary relative to the downstream station. This stationary state is crucial for the precise conveying of the screw. When the slider 222c slides along the arc segment 221b13, due to the action of geometric constraints, even though the slider 222c is moving, the lifting plate 221a can remain stationary, so that the screws in the feeding groove 221a1 are not affected by the movement, ensuring that the screws can slide smoothly and be accurately positioned when conveyed to the downstream station, avoiding screw misalignment or instability caused by mechanical movement.

[0057] Specifically, as Figure 7As shown, the slide rail 221b1 further includes a second horizontal section 221b12, which is provided at one end of the arc section 221b13 away from the first horizontal section 221b11. When the slider 222c moves along the second horizontal section 221b12 in a direction away from the arc section 221b13, the lifting plate 221a is in the material taking state. When the slider 222c moves along the second horizontal section 221b12 in a direction close to the arc section 221b13, the lifting plate 221a is in the feeding docking state. The mutual cooperation among the slide rail 221b1, the first horizontal section 221b11, the arc section 221b13, the second horizontal section 221b12, the slider 222c, and the lifting plate 221a constructs a precise and efficient screw material taking and feeding mechanism. The structure of the slide rail 221b1 not only includes the first horizontal section 221b11 but also ingeniously designs the second horizontal section 221b12, which are respectively arranged at both ends of the arc section 221b13. Specifically, when the slider 222c moves along the second horizontal section 221b12 in a direction away from the arc section 221b13, the lifting plate 221a descends to the material taking state, and at this time, the feeding groove 221a1 opens, facilitating the screws to enter from the lower bin. On the contrary, when the slider 222c moves along the second horizontal section 221b12 towards the arc section 221b13, it causes the lifting plate 221a to rise and enter the feeding docking state. In this state, the feeding groove 221a1 is accurately aligned with the downstream station, ensuring that the screws can be smoothly pushed to the designated position to complete the feeding process.

[0058] In the above embodiment, the slider 222c first swings on the slide rail 221b1 from the arc section 221b13 towards the end of the first horizontal section 221b11 away from the arc section 221b13, and the lifting plate 221a descends to the material taking state. Then, the slider 222c swings along the end of the first horizontal section 221b11 away from the arc section 221b13 towards the arc section 221b13, and the lifting plate 221a rises and enters the feeding docking state. Then, the slider 222c slides into the arc section 221b13, and the lifting plate 221a remains stationary. After the screws slide into the next station, the slider 222c moves on the slide rail 221b1 towards one end of the second horizontal section 221b12 away from the arc section 221b13, and the lifting plate 221a descends to the material taking state. Then, the slider 222c swings and moves back along the second horizontal section 221b12 towards the arc section 221b13, and the lifting plate 221a rises and enters the feeding docking state. Finally, the slider 222c slides into the arc section 221b13, and the lifting plate 221a remains stationary. The above process is a complete cycle of the movement of the slider 222c. During this period, the lifting plate 221a completes two descents for material taking, rises for feeding, and remains stationary.

[0059] In the above embodiment, the radius of the arc of the arc segment 221b13 is designed to be 47.5 mm. To ensure that when the slider 222c transitions from the arc segment 221b13 to the first horizontal segment 221b11 or the second horizontal segment 221b12, the slider 222c can move smoothly and smoothly within the slide rail 221b1, the arc segment 221b13 and the first horizontal segment 221b11 or the second horizontal segment 221b12 are connected by an arc with a radius of 10.2 mm and are tangent to each other.

[0060] Specifically, as Figure 6 shown, the feeding groove 221a1 has a first end 211a11 and a second end 211a12. The height of the first end 211a11 relative to the horizontal plane is higher than the height of the second end 211a12 relative to the horizontal plane. The angle between the feeding groove 221a1 and the horizontal plane is α, and α≥65°. To enable the screw to slide smoothly from the feeding groove 221a1 to the next working station, it is necessary to reasonably design the slope of the feeding groove 221a1 relative to the horizontal plane. As shown in the figure, using the orthogonal decomposition method, we obtain

[0061] Ν = mg·cosα,

[0062] f = Ν·μ = mg·Ν = mg·μ·cosα,

[0063] mg·sinα = mg·μ·cosα,

[0064] That is, tanα > μ,

[0065] In the above formula, m is the mass of the screw, g is the acceleration due to gravity, 9.8 m / s 2 , μ is the friction factor between the screw and the lifting plate, μ = 1 - 1.2, and α is the slope angle of the lifting plate. Therefore, it can be concluded that when tanα > μ, the screw slides down with an acceleration

[0066] a = g·sinα - g·μ·cosα,

[0067] When tanα > μ, the screw will not slide down. Therefore, α = 65° can be taken, and then tan65°≈2.145 > μ is feasible. Therefore, the angle of α can be selected to be greater than or equal to 65°, which can ensure that the screw can slide smoothly from the feeding groove 221a1 to the next working station.

[0068] Specifically, the screw feeder further includes a conveying device 300. One end of the conveying device 300 is disposed within the accommodating cavity 211 and is docked with the feeding assembly 220. The other end of the conveying device 300 is disposed outside the accommodating cavity 211 for transporting the screws on the feeding assembly 220 outside the accommodating cavity 211; a material distributing device 400, the material distributing device 400 is connected to the conveying device 300. The material distributing device 400 includes a feeding end 401 and a discharging end 402. The feeding end 401 is correspondingly disposed with respect to the conveying device 300, and the discharging end 402 is correspondingly disposed with respect to the electric screwdriver head, so that the screws at the feeding end 401 are transported to the discharging end 402. The accommodating cavity 211, the feeding assembly 220, the conveying device 300, and the material distributing device 400, including the feeding end 401 and the discharging end 402, constitute a complete automatic screw conveying and distribution system, realizing the full-process automation from screw material taking to accurately delivering to the electric screwdriver head. The accommodating cavity 211 serves as the basic structure of the screw feeder, and the feeding assembly 220 is arranged inside. This assembly is responsible for the preliminary material taking and conveying of the screws. When the feeding groove 221a1 on the lifting plate 221a carries screws and is in the feeding docking state, one end of the conveying device 300 just docks with it and receives the screws from the feeding assembly 220. The other end of the conveying device 300 extends outside the accommodating cavity 211, acting as a conveying channel for the screws, transporting the screws from the closed internal space to the open external working environment, preparing for subsequent material distribution and allocation. The material distributing device 400 is closely connected to the end of the conveying device 300. Its core structure includes a feeding end 401 and a discharging end 402. The feeding end 401 is directly connected to the conveying device 300 and receives the screws transmitted from the conveying device 300. The discharging end 402 is accurately aligned with the electric screwdriver head, forming the final conveying path of the screws. During this process, the material distributing device 400 ensures that a single screw smoothly moves from the feeding end 401 to the discharging end 402 through the built-in material distribution mechanism, avoiding screw accumulation or misalignment, and ensuring the correct alignment and stable conveying of the screws at the electric screwdriver head.

[0069] Specifically, as Figure 10 , Figure 11As shown, the conveying device 300 includes an orbital plate 310 disposed on the hopper 210. On the upper end surface of the orbital plate 310, a conveying track 311 is provided horizontally. One end of the conveying track 311 is disposed in the accommodating cavity 211 and connected to the feeding chute 221a1, so that the screws in the feeding chute 221a1 fall into the conveying track 311. The other end of the conveying track 311 is connected to the feeding end 401 of the material distributing device 400, so that the screws in the conveying track 311 fall into the feeding end 401. A high degree of synergy is exhibited among the hopper 210, the orbital plate 310, the conveying track 311, and the feeding end 401 of the material distributing device 400, ensuring a seamless connection of the screws from storage to distribution. The orbital plate 310, installed on the hopper 210, has a horizontally arranged conveying track 311 on its upper end surface. One end of this track 311 extends deep into the accommodating cavity 211 and is tightly connected to the feeding chute 221a1, forming a direct path for the screws from the feeding assembly 220 to the orbital plate 310. When the screws in the feeding chute 221a1 slide into the conveying track 311, the straight design and horizontal setting of the conveying track 311 ensure that the screws can move forward smoothly and continuously until they reach the other end of the conveying track 311. The other end of the conveying track 311 is seamlessly connected to the feeding end 401 of the material distributing device 400, and this connection point is the key node for the transition of the screws from the conveying stage to the distributing stage. When the screws reach the end of the conveying track 311, they will naturally slide into the feeding end 401 and start entering the processing process of the material distributing device 400. Throughout the process, the hopper 210 provides the source of the screws, and the feeding chute 221a1 ensures that the screws can accurately enter the conveying track 311 through the lifting mechanism; the orbital plate 310 and its conveying track 311 undertake the task of smoothly transporting the screws; while the feeding end 401 of the material distributing device 400 is ready to receive the screws conveyed by the conveying track 311, preparing for the subsequent individual screw distribution and conveyance to the electric screwdriver head.

[0070] In some embodiments, such as Figure 12As shown in the figure, the above-mentioned conveying device 300 further includes a piezoelectric vibrator 320, which includes a top plate 321, a bottom plate 322, a leaf spring 323, and a piezoelectric bimorph 324. One end of the piezoelectric bimorph 324 is disposed on the bottom plate 322, the other end of the piezoelectric bimorph 324 is connected to one end of the leaf spring 323, the other end of the leaf spring 323 is connected to the top plate 321, and the top plate 321 is connected to the track plate 310, so that when the piezoelectric bimorph 324 vibrates, it drives the top plate 321 to vibrate, thereby causing the screws in the conveying track 311 to move along the extending direction of the conveying track 311. The design of the piezoelectric vibrator 320 cleverly combines the piezoelectric effect and the principle of mechanical vibration. Through the small deformation of the piezoelectric bimorph 324 under the action of an electric field, it is converted into the vibration of the top plate 321, and then drives the screws in the conveying track 311 to move along the track. The key to this design lies in the inverse piezoelectric effect of the piezoelectric bimorph 324 and the amplification effect of the leaf spring 323, which ensures the vibration amplitude and frequency of the top plate 321, avoiding slow screw movement caused by insufficient vibration intensity or screw jumping or misalignment caused by excessive vibration. Since the conveying track 311 is in a horizontal straight shape, the piezoelectric vibrator 320 is installed horizontally. At the same time, the power supply inputs appropriate current and frequency to the piezoelectric bimorph 324, causing it to generate the inverse piezoelectric effect, thereby undergoing reciprocating bending deformation. The leaf spring further amplifies the small deformation of the piezoelectric bimorph 324, thereby driving the top plate 321 to vibrate regularly. Therefore, the piezoelectric vibrator 320, as an entire driving body, drives the screws to move forward along the conveying track 311. In practical applications, for example, in the screw feeding link of an automated assembly line, the efficient vibration function of the piezoelectric vibrator 320 can ensure the stable movement of the screws in the conveying track 311, improving the efficiency and accuracy of screw feeding, and is an important auxiliary tool for realizing automated assembly. Especially when dealing with screws with small sizes and irregular shapes, the fine vibration control of the piezoelectric vibrator 320 can significantly reduce the risk of screw misalignment, improving production quality and efficiency.

[0071] Specifically, as Figures 13 to 17As shown, the material distributing device 400 includes a material distributing assembly 410, which includes a box body 411, a driving block 412 and a nail leakage pipe 413. The box body 411 is connected to the conveying device 300. The upper end surface of the box body 411 is provided with a feeding end 401. The driving block 412 is movably arranged in the box body 411. A nail leakage hole 412a extending in the vertical direction is arranged inside the driving block 412. The nail leakage hole 412a is selectively communicated with the feeding end 401. The nail leakage pipe 413 is arranged at the bottom of the box body 411. One end of the nail leakage pipe 413 is selectively communicated with the nail leakage hole 412a, and the other end of the nail leakage pipe 413 extends along a predetermined direction to form a discharging end 402. A sensor is arranged on the nail leakage pipe 413 to count the number of screws passing through the nail leakage pipe 413; a blowing assembly 420, and the blowing assembly 420 is communicated with the nail leakage hole 412a. The core components of the material distributing device 400 include the material distributing assembly 410 and the blowing assembly 420, which work together to ensure that the screws can be received from the conveying device 300 and accurately conveyed to the electric screwdriver head for tightening operation. The box body 411, as the main body of the material distributing assembly 410, is directly connected to the conveying device 300 to form a transition platform for the screws. The upper end surface of the box body 411 is provided with a feeding end 401, which is the entrance for the screws to enter the material distributing device 400 from the conveying device 300. The driving block 412 is movably arranged in the box body 411, and a nail leakage hole 412a extending in the vertical direction is designed inside it. The selective communication between the nail leakage hole 412a and the feeding end 401 means that by controlling the movement of the driving block 412, it can be determined whether the nail leakage hole 412a is aligned with the feeding end 401, so as to control whether the screws can enter the nail leakage hole 412a. The nail leakage pipe 413 is located at the bottom of the box body 411. One end of it is selectively communicated with the nail leakage hole 412a, and the other end extends along a predetermined direction to form a discharging end 402. A sensor is also installed on the nail leakage pipe 413 to monitor and count the number of screws passing through the nail leakage pipe 413, providing data support for production management and quality control. The blowing assembly 420 blows gas into the nail leakage hole 412a through the air path communication with the nail leakage hole 412a. This action generates sufficient thrust to blow the screws located in the nail leakage hole 412a along the nail leakage pipe 413 from one end to the other end, and finally deliver them to the electric screwdriver head through the discharging end 402 to complete the screw feeding process.

[0072] It should be noted that in the above embodiment, the screw size and the screw feeding requirements need to meet the basic condition L>1.3D for the screws automatically blown through the pipeline, where L is the length of the screw and D is the width of the screw. Otherwise, the screws will flip in the pipeline and cannot be fed correctly.

[0073] In some embodiments, the material dividing assembly 410 further includes a material dividing pull block 414, which is movably arranged inside the driving block 412 corresponding to the leaking nail hole 412a, so that the material dividing pull block 414 is in a supporting position for supporting the screw or allows the screw to fall into the escape position of the leaking nail hole 412a, and the material dividing pull block 414 is provided with a guide block 414a and a supporting groove 414b, and the upper end surface of the box body 411 is provided with a guide groove 411a, and the guide block 414a is arranged in the guide groove 411a, so that the driving block 412 is guided when it moves. The block 414a slides in the guide groove 411a to drive the material dividing block 414 to move, and the supporting groove 414b is set at one end of the material dividing block 414 close to the conveying device 300, wherein, when the material dividing block 414 is in the supporting position, the supporting groove 414b is set close to the conveying device 300, so that the screws on the conveying device 300 fall into the supporting groove 414b, and when the material dividing block 414 is in the avoidance position, the supporting groove 414b is set away from the conveying device 300, so that the screws in the supporting groove 414b fall into the missing nail hole 412a. The design of the material dividing block 414 is an exquisite combination of mechanical movement and guiding principles, and the precise switching of the material dividing block 414 between the supporting position and the avoidance position is realized by the sliding of the guide block 414a in the guide groove 411a. The key to this design is the precise docking of the support groove 414b with the conveying device 300, which ensures that the screws can accurately fall into the support groove 414b and avoids the misalignment or omission of the screws during the material distribution process. In practical applications, such as in the screw feeding link of the automated assembly line, the efficient sorting and guiding functions of the material distribution block 414 can significantly improve the feeding efficiency and accuracy of the screws, reduce the assembly failure rate caused by screw misalignment, and improve production quality and economic benefits. Especially when dealing with small screws of smaller size and complex shape, the precise control of the material distribution block 414 can ensure that each screw enters the missing nail hole 412a in the correct posture, which is an important part of achieving high-precision automated assembly.

[0074] In the above embodiments, the material distributing assembly 410 further includes a material hook 415. The material hook 415 is disposed on the driving block 412 corresponding to the nail leakage hole 412a. When the material distributing pulling block 414 is in the supporting position, the material hook 415 is cooperatively arranged with the supporting groove 414b to limit the axial displacement of the screw. The design of the material hook 415 is based on the limiting principle in mechanical engineering. By cooperating with the supporting groove 414b on the material distributing pulling block 414, it can effectively limit the axial displacement of the screw, ensuring the stability and accuracy of the screw during the material distribution process. The key to this design lies in the precise fit between the material hook 415 and the supporting groove 414b. When the material distributing pulling block 414 is in the supporting position, the material hook 415 can accurately fit into the supporting groove 414b to form a firm limiting structure, avoiding the jumping or flipping of the screw during the air blowing process, and improving the reliability and efficiency of screw feeding. In practical applications, for example, during the assembly of precision electronic devices, the attitude control of the screw is crucial. The limiting function of the material hook 415 can ensure that each screw enters the nail leakage hole 412a in the correct attitude, and then is directionally blown to the head of the electric screwdriver through the nail leakage tube 413, which is an important guarantee for realizing high-precision automatic assembly. Especially when dealing with screws with small sizes and irregular shapes, the limiting effect of the material hook 415 is more obvious, which can significantly reduce the risk of screw misalignment and improve the production quality and efficiency.

[0075] In some embodiments, as Figure 18 、 Figure 19 shown, the screw feeder further includes a deviation rectifying device 500. The deviation rectifying device 500 is disposed on the hopper 210. The deviation rectifying device 500 includes a movable assembly 510. The movable assembly 510 is disposed on the track plate 310 in the accommodating cavity 211. At least a part of the movable assembly 510 in contact with the track plate 310 is movably connected to the track plate 310, so that the screws not in the conveying track 311 on the track plate 310 fall into the accommodating cavity 211. The design of the deviation rectifying device 500 is based on the deviation rectifying principle in mechanical engineering. Through the dynamic adjustment of the movable assembly 510 on the track plate 310, it can timely correct the incorrect attitude or position of the screw during the feeding process, avoiding the problem that the screw is stuck in the gap between the track plate 310 and the conveying track 311, resulting in feeding interruption or reduced efficiency. The key to this design lies in the flexible movement of the contact part between the movable assembly 510 and the track plate 310. When detecting the incorrect attitude of the screw, the movable assembly 510 can quickly respond and push the screw back into the accommodating cavity 211 to re-enter the feeding cycle. In practical applications, the deviation rectifying device 500 is particularly suitable for dealing with screws with small sizes and irregular shapes. For example, during the assembly of precision instruments, the attitude control of the screw is crucial. The efficient deviation rectifying function of the deviation rectifying device 500 can ensure that each screw enters the conveying track 311 in the correct attitude, improving the assembly accuracy and speed, and is an important guarantee for realizing high-precision automatic assembly.

[0076] In the above embodiment, the deviation rectifying device 500 further includes a transmission assembly 520. The transmission assembly 520 is connected to the movable assembly 510. The transmission assembly 520 includes a fixed block 521 and a guide bar 522. The movable assembly 510 includes a brush 511 and a rotating shaft 512. One end of the rotating shaft 512 is connected to the brush 511, and the other end of the rotating shaft 512 passes through the upper part inside the fixed block 521. The guide bar 522 is movably arranged along the horizontal direction perpendicular to the rotating shaft 512. At least part of the guide bar 522 passes through the fixed block 521. The rotating shaft is meshed with the guide bar 522 so that when the guide bar 522 moves horizontally, it drives the rotating shaft 512 to rotate, thereby causing the brush 511 to sweep off the screws on the track slab 310 that are not in the conveying track 311.

[0077] In the above embodiment, the deviation rectifying device 500 can also be directly driven by a motor to rotate the brush, which makes the structure more concise and reduces the noise during operation.

[0078] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0079] Through the cyclic feeding process of the feeding assembly 220, including the material taking state, the feeding docking state and the waiting state, the continuous and stable supply of screws is realized. Especially in the waiting state, by controlling the stillness of the lifting plate 221a, it is ensured that the screws in the feeding groove 221a1 can smoothly slide to the downstream station, avoiding the jumping or jamming of the screws and improving the feeding accuracy.

[0080] The combined use of the crank structure 222 and the slide rail 221b1 ensures the stable lifting and precise positioning of the lifting assembly 221. The setting of the first horizontal section 221b11 and the second horizontal section 221b12, as well as the introduction of the arc section 221b13, realize the smooth transition of the screws between different stations, avoiding the dislocation or damage of the screws caused by rapid movement and improving the working efficiency and safety of the whole system.

[0081] Through the signal connection between the control module and the driving device 223, the precise control of the swing end 222b of the crank structure 222 is realized, and then the movement of the slider 222c in the slide rail 221b1 is controlled, ensuring the automation and accuracy of screw feeding. The setting of the sensor further improves the intelligent level of the system, can real-time monitor the number of screws in the missing screw pipe 413, and provides data support for production management.

[0082] The close cooperation between the conveying device 300 and the material distributing device 400 ensures the fast and accurate conveyance of screws from the hopper 210 to the head of the electric screwdriver. The seamless docking of the horizontal conveying track 311 of the track plate 310 with the feeding end 401 of the material distributing device 400, and the movable characteristics of the driving block 412 enable the screws to smoothly enter the missing screw hole 412a. Then, through the gas pushing action of the blowing assembly 420, the screws accurately move from one end to the other end along the missing screw pipe 413 and finally reach the head of the electric screwdriver. The whole process is efficient and automated.

[0083] This screw feeder reduces the dependence on labor, lowers the labor cost, and also avoids the problems of screw misalignment or omission that may be caused by manual operation, greatly improving the production efficiency and assembly accuracy.

[0084] The setting of the sensor can not only count the number of screws in the missing screw pipe 413 in real time, but also monitor the feeding process, which helps to promptly discover and solve problems, ensuring the continuity and reliability of the screw feeding.

[0085] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or their combinations.

[0086] Unless otherwise specifically stated, the relative arrangements, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that for the convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0087] In the description of the present application, it should be understood that the orientation or positional relationship indicated by orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0088] For convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation other than the orientation described in the figure for the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0089] In addition, it should be noted that using words such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without additional statement, the above words have no special meaning. Therefore, it should not be construed as a limitation on the protection scope of the present application.

[0090] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A screw feeder, characterized in that, Including: A feeding device (200), comprising a hopper (210) and a feeding assembly (220). The hopper (210) encloses a receiving cavity (211) for containing the screws. The feeding assembly (220) is movably arranged in the receiving cavity. The feeding assembly (220) has a cyclic feeding process that sequentially includes a material taking state, a feeding docking state, and a waiting state. The feeding assembly (220) has a feeding chute (221a1) that is inclined for feeding. Wherein, when the feeding assembly (220) is in the material taking state, the feeding chute (221a1) extends into the material receiving position of the receiving cavity (211) to take materials. When the feeding assembly (220) is in the feeding docking state, the feeding assembly (220) drives the feeding chute (221a1) to move to a position docked with the downstream station. When the feeding assembly (220) is in the waiting state, the feeding chute (221a1) is stationary relative to the downstream station, so that the screws in the feeding chute (221a1) slide down to the downstream station.

2. The screw feeder according to claim 1, wherein, The feeding assembly (220) includes: A lifting assembly (221), arranged in the receiving cavity (211). The feeding chute (221a1) is arranged on the lifting assembly (221), and the lifting assembly (221) is arranged to be liftable. A crank structure (222), including a fixed end (222a), a swinging end (222b), and a slider (222c). The swinging end (222b) swings relative to the fixed end (222a) along a preset direction. The slider (222c) is arranged on the swinging end (222b). A slide rail (221b1) is arranged on the lifting assembly (221). The slider (222c) is arranged in the slide rail (221b1) and slidably cooperates with the slide rail (221b1) to enable the feeding assembly (220) to be in the material taking state, the feeding docking state, or the waiting state.

3. The screw feeder according to claim 2, wherein The lifting assembly (221) includes a lifting plate (221a) and a lifting connecting rod (221b). The feeding chute (221a1) is arranged on the lifting plate (221a). The lifting connecting rod (221b) is arranged at one end of the lifting plate (221a) close to the crank structure (222). The slide rail (221b1) is arranged on the lifting connecting rod (221b). The slide rail (221b1) includes a first horizontal section (221b11) arranged in the horizontal direction. When the slider (222c) slides from one end of the first horizontal section (221b11) to the other end, the lifting plate (221a) is in the material taking state. When the slider (222c) slides from the other end of the first horizontal section (221b11) to one end, the lifting plate (221a) is in the feeding docking state.

4. The screw feeder according to claim 3, characterized in that, The screw feeder further includes a control module and a driving device (223). The control module is signal-connected to the driving device (223) to control the movement or stillness of the swing end (222b) connected to the driving device (223). When the swing end (222b) drives the slider (222c) to slide to the end of the first horizontal section (221b11), the control module controls the swing end (222b) to be still so that the lifting plate (221a) is in the waiting state.

5. The screw feeder according to claim 3, wherein, The slide rail (221b1) further includes an arc section (221b13). The arc section (221b13) is provided at one end of the first horizontal section (221b11). The radius of the circle corresponding to the arc section (221b13) is equal to the length corresponding to the distance between the fixed end (222a) and the slider (222c), so that when the slider (222c) slides within the arc section (221b13), the feeding groove (221a1) on the lifting assembly (221) is stationary relative to the downstream station.

6. The screw feeder according to claim 5, characterized in that, The slide rail (221b1) further includes a second horizontal section (221b12). The second horizontal section (221b12) is provided at the end of the arc section (221b13) away from the first horizontal section (221b11). When the slider (222c) moves along the direction away from the arc section (221b13) on the second horizontal section (221b12), the lifting plate (221a) is in the material-taking state. When the slider (222c) moves along the direction close to the arc section (221b13) on the second horizontal section (221b12), the lifting plate (221a) is in the feeding docking state.

7. The screw feeder according to claim 2, wherein, The feeding groove (221a1) has a first end (211a11) and a second end (211a12). The height of the first end (211a11) relative to the horizontal plane is higher than the height of the second end (211a12) relative to the horizontal plane. The angle between the feeding groove (221a1) and the horizontal plane is α, and α satisfies the following relational expression: α≥65°。 8. The screw feeder according to claim 1, characterized in that, The screw feeder further includes: a conveying device (300). One end of the conveying device (300) is arranged in the accommodating cavity (211) and is docked with the feeding assembly (220). The other end of the conveying device (300) is arranged outside the accommodating cavity (211) for conveying the screws on the feeding assembly (220) outside the accommodating cavity (211). a material distributing device (400). The material distributing device (400) is connected to the conveying device (300). The material distributing device (400) includes a feeding end (401) and a discharging end (402). The feeding end (401) corresponds to the conveying device (300), and the discharging end (402) corresponds to the electric screwdriver head, so that the screws at the feeding end (401) are conveyed to the discharging end (402).

9. The screw feeder according to claim 8, characterized in that, The conveying device (300) includes an orbital plate (310) which is arranged on the hopper (210). A conveying track (311) is arranged horizontally on the upper end surface of the orbital plate (310). One end of the conveying track (311) is arranged in the accommodating cavity (211) and connected to the feeding groove (221a1), so that the screws in the feeding groove (221a1) fall into the conveying track (311). The other end of the conveying track (311) is connected to the feeding end (401) of the material distributing device (400), so that the screws in the conveying track (311) fall into the feeding end (401).

10. The screw feeder according to claim 9, characterized in that, The material distributing device (400) includes: A material distributing assembly (410), including a box body (411), a driving block (412) and a screw leakage pipe (413). The box body (411) is connected to the conveying device (300). The feeding end (401) is arranged on the upper end surface of the box body (411). The driving block (412) is movably arranged in the box body (411). A screw leakage hole (412a) extending in the vertical direction is arranged inside the driving block (412). The screw leakage hole (412a) is selectively communicated with the feeding end (401). The screw leakage pipe (413) is arranged at the bottom of the box body (411). One end of the screw leakage pipe (413) is selectively communicated with the screw leakage hole (412a). The other end of the screw leakage pipe (413) extends along a predetermined direction to form the discharging end (402). A sensor is arranged on the screw leakage pipe (413) to count the number of screws passing through the screw leakage pipe (413). A blowing assembly (420) which is communicated with the screw leakage hole (412a) through an air path and is used for blowing air into the screw leakage hole (412a) to blow the screws from one end in the screw leakage pipe (413) to the other end.

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