A passive screw length detection device and a screw conveying device

Abstract

The present invention discloses a passive screw length detection device and a screw conveying device. The detection device includes a first mounting plate, an angle sensor, a dial rod, a dial piece, a first pressing plate and a reset assembly; the angle sensor is connected to the first mounting plate, the rotating shaft of the angle sensor is connected to the middle of the dial rod, the dial piece is connected to one end of the dial rod, and the reset assembly is connected to the other end of the dial rod; the first pressing plate is arranged above the dial piece; the beneficial effect of the present invention is that during the screw conveying process, the screws are gradually adjusted from a bulk disordered state to an orderly arrangement state. The nail separating mechanism cooperates with the length detection device to be able to detect whether the screw length meets the assembly requirements, and the nail separating mechanism can be adaptively modified according to the use requirements. Other conveying links can also be replaced by adding or modifying components to achieve the screw conveying task under various nail-taking purposes, reducing the equipment development difficulty and saving the equipment investment cost.

Description

Technical Field

[0001] The invention belongs to the technical field of material conveying, and in particular relates to a passive screw length detection device and a screw conveying device. Background Art

[0002] Assembly refers to the combination of several parts of a product through tight fitting, snap-fitting, threaded connection, bonding, riveting, welding, etc. to obtain a finished product or semi-finished product that meets the predetermined dimensional accuracy and function. The assembly achieved by manual processing (contact, sorting, grabbing, moving, placing, applying force, etc.) of each part is called manual assembly. The assembly completed without manual processing (contact, sorting, grabbing, moving, placing, applying force, etc.) of parts is called automatic assembly. The semi-automatic assembly is between the two. Screws are the most commonly used parts in assembly, and are mostly supplied in bulk. A key task in automatic assembly is to separate the bulk screws and bring them to a fixed position within a certain period of time and make them in the desired posture. In the prior art, there are many implementation plans for screw conveyors, but most of them need to be customized according to the use environment. The customized design makes the research and development, installation, and commissioning cycle of the screw conveyor longer. After the production task is completed, the customized screw conveyor cannot be used for the transportation of screws of other specifications through structural improvements, and the scrap rate is high, which increases the equipment investment cost. Summary of the invention

[0003] 1. Technical issues to be solved

[0004] In view of the prior art, there are many implementation plans for screw conveyors, but most of them need to be customized according to the use environment. The customized design makes the research and development, installation and debugging cycle of the screw conveyor longer. After the production task is completed, the customized screw conveyor cannot be used for the transportation of screws of other specifications through structural improvement, the discard rate is high, and the equipment investment cost is increased. The purpose of the present invention is to provide a passive screw length detection device and a screw conveying device. The detection device can detect screws of different lengths mixed together to prevent screws that do not meet the length requirements from entering the tightening assembly section; the screw conveying device is provided with a detection device and a nail separation mechanism. The screws are adjusted from a bulk and disordered state to a neatly arranged state and enter the nail separation mechanism, and then the detection device detects the length of the screws one by one, with high detection sensitivity and high work efficiency. The nail separation mechanism and the detection device are the basic configurations of the screw conveying device. The front and rear conveying links can be adaptively modified according to the use requirements. The working environment adaptability is strong, and the screw conveying tasks under various nail removal purposes can be achieved, reducing the difficulty of equipment development and saving equipment investment costs.

[0005] 2. Technical solution

[0006] In order to achieve the above purpose and the above technical effect, the present invention adopts the following technical solution:

[0007] A passive screw length detection device, characterized by comprising a first mounting plate, an angle sensor, a dial rod, a dial piece, a first pressing plate and a reset assembly; the angle sensor is connected to the first mounting plate, the rotating shaft of the angle sensor is connected to the middle of the dial rod, the dial piece is connected to one end of the dial rod, and the reset assembly is connected to the other end of the dial rod; the first pressing plate is arranged above the dial piece; preferably, the angle sensor can be replaced by one of an encoder, a gyroscope, and an inclination sensor; preferably, the reset assembly comprises a first connecting plate and a first spring, a first long slot is arranged on the first mounting plate, the first connecting plate is connected to the first long slot by bolts, one end of the first spring is connected to the first connecting plate, and the other end is connected to the dial rod; preferably, a second long slot is arranged on the first mounting plate, a second connecting plate is connected to the second long slot by bolts, and the second connecting plate is connected to the first pressing plate; preferably, the dial rod is provided with a third long slot, and the dial rod is connected to the dial piece through the third long slot and bolts; the first spring, the dial piece, and the first pressing plate are provided with a connection structure with long slots, so that the passive screw length detection device can be adjusted according to the screw specifications and is applicable to the length detection of multiple specifications of screws.

[0008] When the screw conveying device works, the screw dividing plate of the screw dividing mechanism rotates the screw to the passive screw length detection device. The first pressing plate presses the screw from above. The screw head is between the screw dividing plate and the first pressing plate and will not jump due to the force of the dial piece on the screw rod. The screw dividing plate rotates, making the lower end of the screw rod contact the dial piece. The dial piece drives the dial rod to press down, so that the rotating shaft of the angle sensor rotates; the other end of the dial rod drives the first spring to stretch. If the screw length is fixed, the rotation angle of the rotating shaft is the same. If the rotation angle of the rotating shaft changes, it is determined that the screw is not of the set length; the screw dividing plate continues to rotate, carrying the screw to the nail taking area for corresponding nail taking operations, and the reset assembly resets the dial rod and the angle sensor; the setting of the passive screw length detection device can prevent screws that do not meet the set length from entering the subsequent assembly and tightening process, ensuring the assembly quality. During the whole detection process, the screw is in a conveyed state, and the working efficiency is high.

[0009] A screw conveying device, characterized by comprising the above-mentioned passive screw length detection device and a nail separating mechanism. The nail separating mechanism includes a nail separating limit plate, a nail separating disk, and an intermittent driving mechanism. A circular mounting hole and a feeding port are provided on the nail separating limit plate. The feeding port is communicated with the circular mounting hole. The nail separating disk is arranged in the circular mounting hole, and a plurality of nail separating grooves are arranged on the edge of the nail separating disk. The center of the nail separating disk is connected to the intermittent driving mechanism, and the intermittent driving mechanism drives the nail separating disk to rotate intermittently. The nail separating grooves on the nail separating disk rotate intermittently and are sequentially butted with the feeding port for nail separating and feeding. The nail separating disk is arranged between the first pressing plate and the dial. The passive screw length detection device is arranged at the intermittent stop position after the nail separating groove receives the screw and separates from the feeding port. A nail taking station is arranged on the nail separating limit plate, and the nail taking station is arranged at the intermittent stop position of the nail separating disk after the passive screw length detection device. Preferably, the intermittent driving mechanism is connected to the first mounting seat, and the first mounting plate is connected to the first mounting seat. Preferably, the intermittent driving mechanism includes a driving motor and a Geneva wheel assembly. The driving motor drives the Geneva wheel assembly to rotate, and the Geneva wheel assembly is connected to the nail separating disk to drive the nail separating disk to rotate intermittently.

[0010] Furthermore, the nail separating mechanism further includes a first pair of photoelectric sensors. The first pair of photoelectric sensors are arranged at the nail taking station to detect whether the screw reaches the nail taking station.

[0011] Furthermore, the nail separating mechanism further includes a nail supporting mechanism. The nail supporting mechanism includes a nail supporting anti-rotation cylinder. The piston rod of the nail supporting anti-rotation cylinder is arranged at the lower part of the nail separating disk, and the movement path of the piston rod is close to / away from the center of the nail separating disk. The nail supporting anti-rotation cylinder is connected to the nail separating limit plate through a nail supporting connecting block. The end of the piston rod of the nail supporting anti-rotation cylinder is connected to a nail supporting block. After the screw is brought to the nail taking station by the nail separating disk, the piston rod of the nail supporting anti-rotation cylinder extends out, so that the nail supporting block abuts against the screw rod body. The screw rod body is straightened under the action of the nail separating groove wall surface and the nail supporting block. The nail supporting mechanism is used for straightening the flat washer combined screw, and when taking the external hexagon head screw, preventing the external hexagon head screw from rotating along with the nail taking mechanism, so that the external hexagon screw can be quickly picked up.

[0012] Furthermore, the nail separating mechanism further includes a bit guide plate and a limiting mechanism. The bit guide plate and the limiting mechanism are both arranged at the nail taking station. At the intermittent stop of the nail separating groove at the nail taking station, the nail separating limiting plate is provided with a nail taking guide groove. A V-shaped groove is arranged on the bit guide plate. The V-shaped groove is inclined, and the bottom of the V-shaped groove is on the connection line of the nail taking guide groove and the nail separating groove. The limiting mechanism includes a retaining piece, a return spring, and a limiting screw. The retaining piece is arranged at the lower part of the nail separating limiting plate. A first rotating shaft is arranged in the middle of the retaining piece. One end of the retaining piece is a limiting end, which is set as a circular arc concentric with the nail separating disc. The end of the limiting end closes the notch of the nail separating groove to fix the screw in the nail separating groove. The other end of the retaining piece is a return end, and the return end is connected to the return spring. The limiting screw is arranged on the same side as the return spring and is in abutting connection with the return end. The limiting screw limits the rotation angle of the retaining piece during reset to prevent the limiting end of the retaining piece from colliding rigidly with the nail separating disc due to the pulling force of the return spring. Preferably, a plurality of connection holes with different distances from the first rotating shaft are arranged at the return end, which is convenient for connecting with the return spring to enable the same return spring to provide different pulling forces. Preferably, the bit guide plate is provided with an oblong hole in the vertical direction to fix the bit guide plate and facilitate adjusting the distance from the screw head. When taking a nail with a hand-held electric screwdriver, the nail separating groove pauses at the nail taking station and corresponds to the nail taking guide groove. The bit is placed in the V-shaped groove of the bit guide plate. The bit slides to the screw head. After the screw recognizes the cap, the electric screwdriver moves along the nail taking guide groove away from the nail separating groove. When the screw rod leaves the nail separating groove, it contacts the limiting end of the retaining piece. The retaining piece rotates around the first rotating shaft, and the return spring is stretched. The limiting end is brought under the nail separating limiting plate on both sides of the nail taking guide groove. The screw rod separates from the limiting end, and the nail taking is completed. The return spring drives the retaining piece to reset.

[0013] Furthermore, the nail separating mechanism further includes an electric screwdriver guide block. The electric screwdriver guide block is provided with a guide hole, and the inner wall of the guide hole matches the shape of the bit of the electric screwdriver. The guide hole is arranged directly above the intermittent stop of the nail separating groove at the nail taking station. Preferably, the electric screwdriver guide block is fixed by an oblong hole and a bolt in the vertical direction, which is convenient for adjusting the distance from the screw head.

[0014] Furthermore, the nail separation mechanism also includes a first material stripping block and a first screw collection box; the first material stripping block is arranged at the intermittent stop of the nail separation slot of the nail removal station, and the screws are dropped from the nail separation slot by the rotation of the nail separation disk and the blocking of the first material stripping block; a first flip box cover is arranged at the bottom of the first screw collection box; the first flip box cover is connected to the first screw collection box through a first rotating shaft, one end of the first rotating shaft is connected to a first V-shaped reset rod, one wing plate end of the first V-shaped reset rod is in contact with the first sensor, and the other wing plate end is connected to a first closing spring, and the first closing spring drives the first rotating shaft to keep the first flip box cover in contact with the first The screw collection box is in a closed state, at which time the first sensor contacts the first V-shaped reset rod, and the nail disc rotates intermittently to transport the screws to the nail removal station; when the number of screws reaches the predetermined collection number, the first flip box cover is pressed to make the screws fall from the first flip box cover, at which time the rotating shaft of the first flip box cover drives the first V-shaped reset rod to rotate and disengage from the first sensor, the first closing spring is stretched, the first sensor transmits a signal, the nail disc stops intermittent rotation, and the pressure on the first flip box cover is released, then the first closing spring drives the first V-shaped reset rod to reset, the first sensor contacts the first V-shaped reset rod, the nail disc continues to rotate, and feeds the nail removal station.

[0015] Furthermore, the nail separation mechanism also includes a second material shifting block, a second screw collection box, a third screw collection box and a material guiding mechanism; the second material shifting block is arranged at the intermittent stop of the nail separation slot of the nail removal station, and the screws are dropped from the nail separation slot by the rotation of the nail separation disk and the blocking of the second material shifting block; the second screw collection box, the material guiding mechanism and the third screw collection box are arranged in parallel in sequence, and the second screw collection box is arranged at the lower part of the nail separation slot; a second flip box cover is arranged at the bottom of the second screw collection box; the second flip box cover is connected to the second screw collection box through a second rotating shaft, one end of the second rotating shaft is connected to a second V-shaped reset rod, one wing plate end of the second V-shaped reset rod is in contact with the second sensor, and the other wing plate end is connected to a second closing spring; the second The closing spring drives the second rotating shaft to keep the second flip box cover in a closed state with the second screw collection box, at which time the second sensor contacts the second V-shaped reset rod, and the nail plate intermittently rotates to deliver screws to the nail removal station; a third flip box cover is provided at the bottom of the third screw collection box; the third flip box cover is connected to the third screw collection box through a third rotating shaft, one end of the third rotating shaft is connected to the third V-shaped reset rod, one wing plate end of the third V-shaped reset rod contacts the third sensor, and the other wing plate end is connected to the third closing spring; the third closing spring drives the third rotating shaft to keep the third flip box cover in a closed state with the third screw collection box, at which time the third sensor contacts the third V-shaped reset rod, and the nail plate intermittently rotates to deliver screws to the nail removal station ; The second screw collection box and the third screw collection box are respectively used to receive screws that meet the assembly length requirements and screws that do not meet the assembly length requirements; when the screw falls from the nail slot, the screw is caused to fall into the corresponding screw collection box through the movement of the guide mechanism; the guide mechanism includes a guide plate, a transmission belt, and a drive motor. The guide plate is arranged between the second screw collection box and the third screw collection box, the guide plate is connected to the driven wheel, and the driven wheel and the drive motor are connected by a belt drive. The belt can prevent the transmission belt from slipping when the transmission encounters resistance, thereby avoiding motor overload; assuming that the second screw collection box is used to collect screws that meet the assembly length requirements, and the third screw collection box is used to collect screws that do not meet the assembly length requirements; the passive screw length detection device detects the screw length. When the nail length and the screws meet the requirements, the guide plate is vertically or rotated toward the third screw collection box to make the screws fall into the second screw collection box. When the screws do not meet the requirements, the guide plate is rotated toward the second screw collection box to make the screws fall into the third screw collection box. When the number of screws in the second screw collection box reaches the predetermined collection number, the second flip box cover is pressed to make the screws fall from the second flip box cover. At this time, the second rotating shaft drives the second V-shaped reset rod to rotate and disengage from the second sensor. The second closing spring is stretched, the second sensor transmits a signal, the nail disc stops intermittent rotation, and the pressure on the second flip box cover is released. The second closing spring drives the second V-shaped reset rod to reset, the second sensor contacts the V-shaped reset rod, and the nail disc continues to rotate to feed the nail removal station.Based on the same principle, the screws in the third screw collection box can be emptied.

[0016] Furthermore, the screw conveying device further includes a feeding slide rail and a vibration driving mechanism. The feeding slide rail includes a first feeding plate and a second feeding plate. The lower parts of the first feeding plate and the second feeding plate are bolted to a connecting block. The width of the feeding slide rail is greater than the diameter of the screw rod body and less than the diameter of the screw head, and the width of the feeding slide rail is adjusted according to different screw sizes. The upper surfaces of the first feeding plate and the second feeding plate are flat and form an acute angle with the horizontal plane. A receiving wing plate is provided at the higher end of the feeding slide rail. The lower end of the feeding slide rail is connected to the feeding port of the material distributing mechanism. The connecting block is arranged on one side of the middle of the feeding slide rail close to the material distributing mechanism. A second pressing plate is arranged on the upper surface of the feeding slide rail. The second pressing plate is connected to the connecting block through a connecting plate. Fourth long waist holes are arranged in the vertical direction on the connecting plate to adjust the height difference between the second pressing plate and the feeding slide rail. Fifth long waist holes are arranged on the second pressing plate horizontally to adjust the horizontal distance between the second pressing plate and the feeding slide rail in the horizontal direction. A second pair of photoelectric sensors are arranged on the feeding slide rail to detect whether the screws are fully arranged on the track. If they are fully arranged, the feeding to the feeding slide rail is stopped to avoid piling up materials on the track.

[0017] Furthermore, a brush mechanism and an air blowing mechanism are arranged on the feeding slide rail. The brush mechanism includes a brush, a connecting rod mechanism and a brush driving motor. The output shaft of the brush driving motor is connected to one end of the connecting rod mechanism, and the other end of the connecting rod mechanism is connected to the brush. The brush is arranged on the feeding slide rail between the receiving wing plate and the second pressing plate. The air blowing mechanism includes an air inlet joint, an air distribution block and an air blowing guiding pipe. An air inlet and a plurality of air outlets are arranged on the air distribution block. The two ends of the air inlet are respectively connected to the air inlet joint and the plurality of air outlets. Each air outlet is connected to an air blowing guiding pipe. The air blowing guiding pipe points to the upper part of the feeding slide rail between the receiving wing plate and the second pressing plate. The brush mechanism and the air flow are used to blow the screws off the feeding slide rail or adjust their postures so that they can enter the track.

[0018] Furthermore, a material pushing rod is arranged on the feeding slide rail between the receiving wing plate and the second pressing plate. The material pushing rod points to the screw feeding direction or the screw conveying direction. The upper end of the material pushing rod is higher than the upper plane of the track, and is used to prevent the screws lying horizontally on the track from entering the space between the second pressing plate and the feeding slide rail and causing the problem of stuck screws. It cooperates with the brush mechanism and the air blowing mechanism to remove them from the feeding slide rail. The material pushing rod is connected to the feeding slide rail through long waist holes and bolts, which is convenient for adjusting the height.

[0019] Furthermore, a cleaning mechanism is provided at the end of the feeding slide rail. The cleaning mechanism includes air holes, a first blowing head, a second blowing head, and a dust suction head provided on the first feeding plate and the second feeding plate. The first blowing head, the second blowing head, and the dust suction head are arranged on a bracket for easy disassembly and assembly. A first flexible gasket is provided between the first blowing head and the air hole of the first feeding plate, and a second flexible gasket is provided between the second blowing head and the second feeding plate. The flexible gaskets serve the functions of sealing and buffering. The first blowing head and the second blowing head are connected to a gas source to blow off the dust and debris on the screw rod body, and the dust suction head is connected to a vacuum cleaner to collect the dust and debris.

[0020] Furthermore, the vibration driving mechanism includes a first base, an electromagnet, an armature, a spring plate, and a second base. The spring plate is inclined at a certain angle and connects the first base and the second base. The lower part of the electromagnet is connected to the first base. The upper part of the armature is threadedly connected to the lower part of the second base, and a gap is provided between the lower part of the armature and the upper part of the electromagnet. A stop screw in the radial direction of the armature is provided on the second base to fix the armature. In addition, the threaded connection between the armature and the second base can adjust the size of the gap between the armature and the electromagnet. The second base is connected to a connecting block to drive the feeding slide rail to vibrate.

[0021] Furthermore, the screw conveying device further includes a feeding hopper. The feeding hopper includes a silo, an aggregate runner, and a first driving mechanism. The silo is arc-shaped, with one end higher and the other end lower. The lower end is connected to the aggregate runner, and the aggregate runner is connected to the first driving mechanism. A dust collection mechanism is provided at the silo near the aggregate runner. The dust collection mechanism includes a negative pressure dust suction joint, a dust collection box, and a plurality of dust suction holes provided on the panel of the silo. One end of the feeding slide rail provided with a receiving wing plate is located above the hopper, and the other part extends outside the hopper.

[0022] Furthermore, a material level detection mechanism is provided at the upper part of the silo. The material level detection mechanism includes a first material level sensor and a second material level sensor. The first material level sensor is provided at the lowest end face of the lower end of the silo, and the second material level sensor is provided at the bottom of the feeding slide rail. The material level detection mechanism provides data for the system to monitor the screw material level.

[0023] 3. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows: The screw conveying device provided by the present invention gradually adjusts from a bulk and disordered state to an orderly arrangement state during the screw conveying process. The nail sorting mechanism cooperates with the length detection device to be able to detect whether the screw length meets the assembly requirements, and the nail sorting mechanism can be adaptively modified according to the use requirements. Other conveying links can also be replaced by adding or modifying components. It has strong adaptability to the working environment, realizes the screw conveying task under various nail-taking purposes, reduces the equipment development difficulty, and saves the equipment investment cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic diagram of the partial structure of the passive screw length detection device of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the passive screw length detection device of the present invention and the nail separating mechanism from a first perspective.

[0028] Figure 3 It is a schematic diagram of the structure of the passive screw length detection device of the present invention and the nail separating mechanism from a second perspective.

[0029] Figure 4 It is a schematic diagram of the nail supporting mechanism of the present invention.

[0030] Figure 5 It is a schematic sectional view of the nail supporting mechanism of the present invention.

[0031] Figure 6 It is a schematic diagram of the limiting mechanism of the present invention below the limiting plate.

[0032] Figure 7 It is a schematic diagram of the hidden limiting plate limiting mechanism of the present invention.

[0033] Figure 8 It is a schematic diagram of the electric screwdriver guide block of the present invention.

[0034] Figure 9 It is an assembly sectional view of the electric screwdriver guide block of the present invention in use.

[0035] Figure 10 It is a schematic diagram of the first perspective of the first screw collection box of the present invention.

[0036] Figure 11 It is a schematic diagram of the second perspective of the first screw collection box of the present invention.

[0037] Figure 12 It is a schematic diagram of the first perspective of the second screw collection box of the present invention.

[0038] Figure 13 It is a schematic diagram of the second perspective of the second screw collection box of the present invention.

[0039] Figure 14 It is a schematic diagram of the third perspective of the second screw collection box of the present invention.

[0040] Figure 15 It is a schematic structural diagram of the first perspective of the feeding slide rail and the vibration driving mechanism of the present invention.

[0041] Figure 16 It is a schematic structural diagram of the second perspective of the feeding slide rail and the vibration driving mechanism of the present invention.

[0042] Figure 17 It is a schematic structural diagram of the air hole structure of the feeding slide rail of the present invention.

[0043] Figure 18 It is a schematic structural diagram of the first perspective of the brush mechanism and the air blowing mechanism of the present invention.

[0044] Figure 19 It is a schematic structural diagram of the second perspective of the brush mechanism and the air blowing mechanism of the present invention.

[0045] Figure 20 It is a schematic structural diagram of a partial structure of the feeding hopper of the present invention.

[0046] Figure 21 It is a schematic structural diagram of the dust collection mechanism of the present invention.

[0047] Figure 22 It is a schematic structural diagram of the feeding hopper of the present invention.

[0048] Figure 23 It is a schematic top view structural diagram of the feeding hopper of the present invention.

[0049] In the figure: 1 - First mounting plate; 2 - Angle sensor; 3 - Lever; 4 - Paddle; 5 - First pressure plate; 6 - First connecting plate; 7 - First spring; 8 - First oblong hole; 9 - Second oblong hole; 10 - Second connecting plate; 11 - Third oblong hole; 12 - Nail separating limit plate; 13 - Nail separating disc; 14 - Intermittent drive mechanism; 15 - Feeding port; 16 - Nail separating groove; 17 - First mounting seat; 18 - First pair of photoelectric sensors; 19 - Nail supporting anti-rotation cylinder; 20 - Piston rod; 21 - Nail supporting connecting block; 22 - Nail supporting block; 23 - Bit guide plate; 24 - Nail picking guide groove; 25 - V-shaped groove; 26 - Flap; 27 - Return spring; 28 - Limit screw; 29 - First rotating shaft; 30 - Connecting hole; 31 - Electric screwdriver guide block; 32 - Guide hole; 33 - First feeding block; 34 - First screw collecting box; 35 - First flipping box cover; 36 - First rotating shaft; 37 - First V-shaped return rod; 38 - First sensor; 39 - First closing spring; 40 - Second screw collecting box; 41 - Third screw collecting box; 42 - Second flipping box cover; 43 - Second rotating shaft; 44 - Second V-shaped return rod; 45 - Second sensor; 46 - Second closing spring; 47 - Third flipping box cover; 48 - Third rotating shaft; 49 - Third V-shaped return rod; 50 - Third sensor; 51 - Third closing spring; 52 - Material guiding plate; 53 - Transmission belt; 54 - Driving motor; 55 - First feeding plate; 56 - Second feeding plate; 57 - Connecting block; 58 - Material receiving wing plate; 59 - Second pressure plate; 60 - Third connecting plate; 61 - Fourth oblong hole; 62 - Fifth oblong hole; 63 - Second pair of photoelectric sensors; 64 - Brush; 65 - Linkage mechanism; 66 - Brush driving motor; 67 - Air inlet joint; 68 - Air distributing block; 69 - Air blowing guiding pipe; 70 - Feeding rod; 71 - Air hole; 72 - First air blowing head; 73 - Second air blowing head; 74 - Dust suction head; 75 - Bracket; 76 - First flexible gasket; 77 - Second flexible gasket; 78 - First base; 79 - Electromagnet; 80 - Armature; 81 - Spring piece; 82 - Second base; 83 - Stop screw; 84 - Magazine; 85 - Aggregating runner; 86 - First driving mechanism; 87 - Negative pressure dust suction joint; 88 - Dust collecting box; 89 - Dust suction hole; 90 - First material level sensor; 91 - Second material level sensor. Detailed implementation manners

[0050] The technical solutions of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the invention without creative efforts shall fall within the protection scope of the invention.

[0051] In the description of the invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the invention.

[0052] In the description of the invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the invention can be understood according to specific circumstances.

[0053] Embodiment 1

[0054] As Figure 1 , Figure 2 , Figure 3 shown, a passive screw length detection device includes a first mounting plate 1, an angle sensor 2, a lever 3, a paddle 4, a first pressure plate 5 and a reset assembly; preferably, the angle sensor 2 can be replaced by one of an encoder, a gyroscope, and an inclination sensor. The angle sensor 2 is connected to the first mounting plate 1, the rotating shaft of the angle sensor 2 is connected to the middle of the lever 3, the paddle 4 is connected to one end of the lever 3, and the reset assembly is connected to the other end of the lever 3; a first pressure plate 5 is arranged above the paddle 4; preferably, the reset assembly includes a first connecting plate 6 and a first spring 7. The first mounting plate 1 is connected to a second mounting plate, a first long slot 8 is arranged on the second mounting plate, the first connecting plate 6 is connected to the first long slot 8 by bolts, one end of the first spring 7 is connected to the first connecting plate 6, and the other end is connected to the lever 3; preferably, a second long slot 9 is arranged on the first mounting plate 1, a second connecting plate 10 is connected to the second long slot 9 by bolts, and the second connecting plate 10 is connected to the first pressure plate 5; preferably, the lever 3 is provided with a third long slot 11, and the lever 3 is connected to the paddle 4 through the third long slot 11 and bolts; the first spring 7, the paddle 4, and the first pressure plate 5 can be adjusted according to the screw specifications through the connection structure with long slots, and are applicable to the length detection of multi-specification screws.

[0055] When the screw conveying device is working, the nail separating disc 13 of the nail separating mechanism rotates with the screws to the passive screw length detection device. The first pressing plate 5 presses the screws from above. The screw heads are between the nail separating disc 13 and the first pressing plate 5, and will not jump due to the acting force of the paddle 4 on the screw rod. The nail separating disc 13 rotates, making the lower end of the screw rod contact the paddle 4. The paddle 4 drives the lever 3 to press down, thus rotating the rotating shaft of the angle sensor 2; the other end of the lever 3 drives the spring to stretch. If the screw length is fixed, the rotation angle of the rotating shaft is the same. If the rotation angle of the rotating shaft changes, it is determined that the screw is not of the set length; the nail separating disc 13 continues to rotate, bringing the screws to the nail taking area for corresponding nail taking operations, and the reset assembly resets the lever 3 and the angle sensor 2; the setting of the passive screw length detection device can prevent screws that do not meet the set length from entering the subsequent assembly and tightening process, ensuring the assembly quality.

[0056] Embodiment 2

[0057] As Figure 1 、 Figure 2 、 Figure 3 shown, a screw conveying device includes the passive screw length detection device and the nail separating mechanism in Embodiment 1. The nail separating mechanism includes a nail separating limit plate 12, a nail separating disc 13, and an intermittent driving mechanism 14. A circular mounting hole and a feeding port 15 are provided on the nail separating limit plate 12. The feeding port 15 communicates with the circular mounting hole. The nail separating disc 13 is arranged in the circular mounting hole, and a plurality of nail separating grooves 16 are arranged on the edge of the nail separating disc 13; the center of the nail separating disc 13 is connected to the intermittent driving mechanism 14, and the intermittent driving mechanism 14 drives the nail separating disc 13 to rotate intermittently. The nail separating grooves 16 on the nail separating disc 13 rotate intermittently and are docked with the feeding port 15 in turn for nail separating and feeding; the nail separating disc 13 is arranged between the first pressing plate 5 and the paddle 4; the passive screw length detection device is arranged at the intermittent stop position after the nail separating groove 16 receives the screws and separates from the feeding port 15; a nail taking station is provided on the nail separating limit plate 12, and the nail taking station is arranged at the intermittent stop position of the nail separating disc 13 after the passive screw length detection device; preferably, the intermittent driving mechanism 14 is connected to the first mounting seat 17, and the first mounting plate 1 is connected to the first mounting seat 17; preferably, the intermittent driving mechanism 14 includes a driving motor and a Geneva wheel assembly. The driving motor drives the Geneva wheel assembly to rotate, and the Geneva wheel assembly is connected to the nail separating disc 13 to drive the nail separating disc 13 to rotate intermittently.

[0058] The nail separating mechanism further includes a first pair of photoelectric sensors 18. The first pair of photoelectric sensors 18 are arranged at the nail taking station to detect whether the screws reach the nail taking station.

[0059] Embodiment 3

[0060] As Figure 4 、 Figure 5As shown, on the basis of Embodiment 2, the nail separating mechanism of a screw conveying device further includes a nail supporting mechanism. The nail supporting mechanism includes a nail supporting and anti-rotation cylinder 19. The piston rod 20 of the nail supporting and anti-rotation cylinder 19 is arranged below the nail separating disc 13. The movement path of the piston rod 20 points to the center of the nail separating disc 13. The nail supporting and anti-rotation cylinder 19 is connected to the nail separating limit plate 12 through a nail supporting connecting block 21. The end of the piston rod 20 of the nail supporting and anti-rotation cylinder 19 is connected to a nail supporting block 22. After the screw is brought by the nail separating disc 13 to the nail taking station, the piston rod 20 of the nail supporting and anti-rotation cylinder 19 extends out, so that the nail supporting block 22 abuts against the screw rod body. The screw rod body is straightened under the action of the wall surface of the nail separating groove 16 and the nail supporting block 22. The nail supporting mechanism is used for straightening the spring washer combined screws and preventing the rotation of the external hexagon head screws when taking the external hexagon head screws.

[0061] Embodiment 4

[0062] As Figure 6 、 Figure 7As shown, on the basis of Embodiment 2, the nail separating mechanism of a screw conveying device further includes a bit guide plate 23 and a limiting mechanism. Both the bit guide plate 23 and the limiting mechanism are arranged at the nail taking station. At the intermittent stop of the nail separating groove 16 at the nail taking station, a nail taking guide groove 24 is provided on the nail separating limiting plate 12. A V-shaped groove 25 is provided on the bit guide plate 23. The V-shaped groove 25 is inclined, and the bottom of the V-shaped groove 25 is on the connection line of the nail taking guide groove 24 and the nail separating groove 16. The limiting mechanism includes a retaining piece 26, a return spring 27, and a limiting screw 28. The retaining piece 26 is arranged at the lower part of the nail separating limiting plate 12. A first rotating shaft 29 is arranged in the middle of the retaining piece 26. One end of the retaining piece 26 is a limiting end, which is set as a circular arc concentric with the nail separating disc 13. The end of the limiting end closes the notch of the nail separating groove 16 to fix the screw in the nail separating groove 16. The other end of the retaining piece 26 is a return end, and the return end is connected to the return spring 27. The limiting screw 28 is arranged on the same side as the return spring 27, and the limiting screw 28 abuts and connects with the return end. The limiting screw 28 limits the rotation angle of the retaining piece 26 during reset to prevent the limiting end of the retaining piece 26 from rigidly colliding with the nail separating disc 13 due to the pulling force of the return spring 27. Preferably, a plurality of connection holes 30 with different distances from the first rotating shaft 29 are arranged at the return end, which is convenient for connecting with the return spring 27 to enable the same return spring 27 to provide different pulling forces. Preferably, the bit guide plate 23 is provided with a long oval hole in the vertical direction to fix the bit guide plate 23 and facilitate adjusting the distance from the screw head. When taking a nail with a hand-held electric screwdriver, the nail separating groove 16 pauses at the nail taking station and corresponds to the nail taking guide groove 24. The bit is placed in the V-shaped groove of the bit guide plate 23. When the bit slides to the screw head and the screw recognizes the cap, the electric screwdriver moves along the nail taking guide groove 24 away from the nail separating groove 16. When the screw rod leaves the nail separating groove 16, it contacts the limiting end of the retaining piece 26. The retaining piece 26 rotates around the first rotating shaft 29, and the return spring 27 is stretched. The limiting end is brought under the nail separating limiting plate 12 on both sides of the nail taking guide groove 24. The screw rod separates from the limiting end, and the nail taking is completed. The return spring 27 drives the retaining piece 26 to reset.

[0063] Embodiment 5

[0064] As Figure 8 、 Figure 9 shown, on the basis of Embodiment 2, the nail separating mechanism of a screw conveying device further includes an electric screwdriver guide block 31. The electric screwdriver guide block 31 is provided with a guide hole 32, and the inner wall of the guide hole 32 matches the shape of the bit of the electric screwdriver. The guide hole 32 is arranged directly above the intermittent stop of the nail separating groove 16 at the nail taking station. Preferably, the electric screwdriver guide block 31 is fixed by a long oval hole and a bolt in the vertical direction, which is convenient for adjusting the distance from the screw head.

[0065] Embodiment 6

[0066] As Figure 10 、 Figure 11As shown, on the basis of Example 2, a nail separation mechanism of a screw conveying device further includes a first material separation block 33 and a first screw collection box 34; the first material separation block 33 is arranged at the intermittent stop position of the nail separation groove 16 of the nail removal station, and the screws are dropped from the nail separation groove 16 by the rotation of the nail separation disk 13 and the blocking of the first material separation block 33; a first flip box cover 35 is arranged at the bottom of the first screw collection box 34; the first flip box cover 35 is connected to the first screw collection box 34 through a first rotating shaft 36, one end of the first rotating shaft 36 is connected to a first V-shaped reset rod 37, one wing plate end of the first V-shaped reset rod 37 is in contact with a first sensor 38, and the other wing plate end is connected to a first closing spring 39, preferably, the first sensor 38 can be replaced by a micro switch, and the first closing spring 39 drives the first rotating shaft 3 6 keeps the first flip box cover 35 in a closed state with the first screw collecting box 34, at which time the first sensor 38 contacts the first V-shaped reset rod 37, and the nail plate 13 rotates intermittently to feed the screws to the nail taking station; when the number of screws reaches the predetermined collection number, the first flip box cover 35 is pressed to make the screws fall from the first flip box cover 35, at which time the rotating shaft of the first flip box cover 35 drives the first V-shaped reset rod 37 to rotate and break away from the contact with the first sensor 38, the first closing spring 39 is stretched, the first sensor 38 transmits a signal, the nail plate 13 stops intermittently rotating, and the pressing of the first flip box cover 35 is released, then the first closing spring 39 drives the first V-shaped reset rod 37 to reset, the first sensor 38 contacts the first V-shaped reset rod 37, and the nail plate 13 continues to rotate to feed the nail taking station.

[0067] Example 7

[0068] like Figures 12 to 14As shown, on the basis of Embodiment 2, the nail separating mechanism of a screw conveying device further includes a second feeding block, a second screw collecting box 40, a third screw collecting box 41 and a material guiding mechanism; the second feeding block is arranged at the intermittent stop position of the nail separating groove 16 at the nail taking station, and the rotation of the nail separating disc 13 and the blocking of the second feeding block are used to make the screws fall from the nail separating groove 16; the second screw collecting box 40, the material guiding mechanism and the third screw collecting box 41 are arranged in parallel in sequence, and the second screw collecting box 40 is preferably arranged below the nail separating groove 16; a second flipping box cover 42 is arranged at the bottom of the second screw collecting box 40; the second flipping box cover 42 is connected to the second screw collecting box 40 through a second rotating shaft 43, one end of the second rotating shaft 43 is connected to a second V-shaped reset rod 44, one end of a wing plate of the second V-shaped reset rod 44 contacts a second sensor 45, and the other end of the wing plate is connected to a second closing spring 46. Preferably, the second sensor 45 can be replaced by a microswitch; the second closing spring 46 drives the second rotating shaft 43 to keep the second flipping box cover 42 in a closed state with the second screw collecting box 40. At this time, the second sensor 45 contacts the second V-shaped reset rod 44, and the nail separating disc 13 intermittently rotates to convey the screws to the nail taking station; a third flipping box cover 47 is arranged at the bottom of the third screw collecting box 41; the third flipping box cover 47 is connected to the third screw collecting box 41 through a third rotating shaft 48, one end of the third rotating shaft 48 is connected to a third V-shaped reset rod 49, one end of a wing plate of the third V-shaped reset rod 49 contacts a third sensor 50, and the other end of the wing plate is connected to a third closing spring 51. Preferably, the third sensor 50 can be replaced by a microswitch; the third closing spring 51 drives the third rotating shaft 48 to keep the third flipping box cover 47 in a closed state with the third screw collecting box 41. At this time, the third sensor 50 contacts the third V-shaped reset rod 49, and the nail separating disc 13 intermittently rotates to convey the screws to the nail taking station; the second screw collecting box 40 and the third screw collecting box 41 are respectively used to receive the screws with lengths meeting the assembly requirements and the screws with lengths not meeting the assembly requirements; when the screws fall from the nail separating groove 16, the movement of the material guiding mechanism makes the screws fall into the corresponding screw collecting boxes; the material guiding mechanism includes a material guiding plate 52, a transmission belt 53 and a driving motor 54. The material guiding plate 52 is arranged between the second screw collecting box 40 and the third screw collecting box 41. The material guiding plate 52 is connected to a driven wheel, and the driven wheel is connected to the driving motor 54 by belt transmission. Using a belt can make the transmission belt 53 slip when the transmission encounters resistance, avoiding overload of the driving motor 54; it is assumed that the second screw collecting box 40 is used to collect the screws with lengths meeting the assembly requirements, and the third screw collecting box 41 is used to collect the screws with lengths not meeting the assembly requirements;The passive screw length detection device detects the length of the screw. When the screw meets the requirements, the guide plate 52 is vertical or rotates towards the third screw collection box 41, causing the screw to fall into the second screw collection box 40. When the screw does not meet the requirements, the guide plate 52 rotates towards the second screw collection box 40, causing the screw to fall into the third screw collection box 41. When the number of screws in the second screw collection box 40 reaches the predetermined collection quantity, press the second flip cover 42 to make the screw fall from the second flip cover 42. At this time, the second rotating shaft drives the second V-shaped reset rod to rotate, disengaging from contact with the second sensor. The second closing spring is stretched, and the second sensor conducts a signal, causing the nail sorting disc 13 to stop intermittent rotation and releasing the pressing on the second flip cover 42. Then the second closing spring drives the second V-shaped reset rod to reset, and the second sensor contacts the V-shaped reset rod, and the nail sorting disc 13 continues to rotate to supply materials to the nail taking station. By the same principle, the screws in the third screw collection box 41 can be emptied.;

[0069] Embodiment 8

[0070] As Figures 15 - 19 shown, on the basis of one of Embodiment 2, Embodiments 3 - 7, a screw conveying device further includes a feeding slide rail and a vibration driving mechanism. The feeding slide rail includes a first feeding plate 55 and a second feeding plate 56. The lower parts of the first feeding plate 55 and the second feeding plate 56 are bolted to the connecting block 57. The width of the feeding slide rail is greater than the diameter of the screw rod body and less than the diameter of the screw head, and the width of the feeding slide rail is adjusted according to different screw sizes; the upper surfaces of the first feeding plate 55 and the second feeding plate 56 are flat and form an acute angle with the horizontal plane. A receiving wing plate 58 is provided at the higher end of the feeding slide rail; the lower end of the feeding slide rail is connected to the feeding port 15 of the material distribution mechanism; the connecting block 57 is arranged on one side of the middle of the feeding slide rail close to the material distribution mechanism. A second pressing plate 59 is provided on the upper surface of the feeding slide rail. The second pressing plate 59 is connected to the connecting block 57 through a third connecting plate 60. A fourth long slot 61 is provided on the third connecting plate 60 in the vertical direction to adjust the height difference between the second pressing plate 59 and the feeding slide rail. A fifth long slot 62 is provided on the second pressing plate 59, and the fifth long slot 62 is horizontally arranged to adjust the horizontal distance between the second pressing plate 59 and the feeding slide rail in the horizontal direction; a second pair of photoelectric sensors 63 are provided on the feeding slide rail to detect whether the screws are fully arranged on the track. If they are fully arranged, the feeding to the feeding slide rail is stopped to avoid piling up materials on the track.

[0071] A brush mechanism and an air blowing mechanism are provided on the feeding slide rail; the brush mechanism includes a brush 64, a linkage mechanism 65, and a brush driving motor 66. The output shaft of the brush driving motor 66 is connected to one end of the linkage mechanism 65, and the other end of the linkage mechanism 65 is connected to the brush 64; the brush 64 is arranged on the feeding slide rail between the material receiving wing plate 58 and the second pressing plate 59; the blowing mechanism includes an air inlet joint 67, an air distribution block 68, and an air blowing guiding pipe 69. The air distribution block 68 is provided with an air inlet and a plurality of air outlets. The two ends of the air inlet are respectively connected to the air inlet joint 67 and the plurality of air outlets, and each air outlet is connected to an air blowing guiding pipe 69. The air blowing guiding pipe 69 points to the upper part of the feeding slide rail between the material receiving wing plate 58 and the second pressing plate 59. The brush mechanism and the air flow are used to blow the screws off the feeding slide rail or adjust the posture to be able to enter the track.

[0072] A material shifting rod 70 is arranged on the feeding slide rail between the material receiving wing plate 58 and the second pressing plate 59. The material shifting rod 70 points to the direction of screw feeding or the screw conveying direction. The upper end of the material shifting rod 70 is higher than the upper plane of the track, and is used to prevent the screws lying horizontally on the track from entering the space between the second pressing plate 59 and the feeding slide rail and causing the problem of stuck screws, and cooperate with the brush mechanism and the blowing mechanism to remove them from the feeding slide rail; the material shifting rod 70 is connected to the feeding slide rail through a long slot and a bolt, which is convenient for adjusting the height.

[0073] A cleaning mechanism is arranged at the end of the feeding slide rail. The cleaning mechanism includes air holes 71, a first air blowing head 72, a second air blowing head 73, and a dust suction head 74 arranged on the first feeding plate 55 and the second feeding plate 56. The first air blowing head 72, the second air blowing head 73, and the dust suction head 74 are arranged on a bracket 75 for convenient disassembly and assembly. A first flexible gasket 76 is arranged between the first air blowing head 72 and the air hole 71 of the first feeding plate 55, and a second flexible gasket 77 is arranged between the second air blowing head 73 and the second feeding plate 56. The flexible gasket plays a role in sealing and buffering. The first air blowing head 72 and the second air blowing head 73 are connected to a gas source to blow off the dust and debris on the screw rod body, and the dust suction head 74 is connected to a vacuum cleaner to collect the dust and debris.

[0074] The vibration driving mechanism includes a first base 78, an electromagnet 79, an armature 80, a spring piece 81, and a second base 82. The spring piece 81 is arranged obliquely at a certain angle and connects the first base 78 and the second base 82. The lower part of the electromagnet 79 is connected to the first base 78. The upper part of the armature 80 is threadedly connected to the lower part of the second base 82, and a gap is arranged between the lower part of the armature 80 and the upper part of the electromagnet 79; a stop screw 83 in the radial direction of the armature 80 is arranged on the second base 82 to fix the armature 80; in addition, the threaded connection between the armature 80 and the second base 82 can adjust the size of the gap between the armature 80 and the electromagnet 79; the second base 82 is connected to the connecting block 57 to drive the feeding slide rail to vibrate.

[0075] Embodiment 9

[0076] As Figures 20 - 23 shown, on the basis of one of Embodiment 2 and Embodiments 3-8, a screw conveying device further includes a feeding hopper, and the feeding hopper includes a bin 84, an aggregate runner 85 and a first driving mechanism 86; the bin 84 is arc-shaped, with one end higher and the other end lower, and the lower end is connected to the aggregate runner 85, and the aggregate runner 85 is connected to the first driving mechanism 86; a dust collection mechanism is arranged at the bin 84 near the aggregate runner 85, and the dust collection mechanism includes a negative pressure dust suction joint 87, a dust collection box 88 and a plurality of dust suction holes 89 arranged on the panel of the bin 84; one end of the receiving wing plate 58 of the feeding slide rail is arranged above the hopper, and the other part extends outside the hopper.

[0077] A material level detection mechanism is arranged at the upper part of the bin 84, and the material level detection mechanism includes a first material level sensor 90 and a second material level sensor 91. The first material level sensor 90 is arranged at the lowest end face of the lower end of the bin 84, and the second material level sensor 91 is arranged at the bottom of the feeding slide rail. The material level detection mechanism provides data for the system to monitor the screw material level.

[0078] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

[0079] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A screw conveying device, characterized in that: It includes a passive screw length detection device and a nail separating mechanism. The passive screw length detection device includes a first mounting plate (1), an angle sensor (2), a dial rod (3), a dial piece (4), a first pressing plate (5) and a reset assembly; the angle sensor (2) is connected to the first mounting plate (1), the rotating shaft of the angle sensor (2) is connected to the middle of the dial rod (3), the dial piece (4) is connected to one end of the dial rod (3), and the reset assembly is connected to the other end of the dial rod (3); the first pressing plate (5) is arranged above the dial piece (4). The nail separating mechanism includes a nail separating limit plate (12), a nail separating disc (13), and an intermittent driving mechanism (14). A circular mounting hole and a feeding port (15) are arranged on the nail separating limit plate (12), the feeding port (15) is communicated with the circular mounting hole, the nail separating disc (13) is arranged in the circular mounting hole, and a plurality of nail separating grooves (16) are arranged on the edge of the nail separating disc (13); the center of the nail separating disc (13) is connected to the intermittent driving mechanism (14), the intermittent driving mechanism (14) drives the nail separating disc (13) to rotate intermittently, and the nail separating grooves (16) on the nail separating disc (13) rotate intermittently and are sequentially docked with the feeding port (15) for nail separating and feeding; the nail separating disc (13) is arranged between the first pressing plate (5) and the dial piece (4); the passive screw length detection device is arranged at the intermittent stop position after the nail separating groove (16) receives the screw and separates from the feeding port (15); a nail taking station is arranged on the nail separating limit plate (12), and the nail taking station is arranged at the intermittent stop position of the nail separating disc (13) after the passive screw length detection device; the intermittent driving mechanism (14) is connected to the first mounting seat (17), and the first mounting plate (1) is connected to the first mounting seat (17); the nail separating mechanism further includes a first pair of photoelectric sensors (18), and the first pair of photoelectric sensors (18) are arranged at the nail taking station.

2. The screw conveying device according to claim 1, characterized in that: The nail separating mechanism further includes a nail supporting mechanism. The nail supporting mechanism includes a nail supporting anti-rotation cylinder (19), the piston rod (20) of the nail supporting anti-rotation cylinder (19) is arranged below the nail separating disc (13), the movement path of the piston rod (20) points to the center of the nail separating disc (13), the nail supporting anti-rotation cylinder (19) is connected to the nail separating limit plate (12) through a nail supporting connecting block (21), and the end of the piston rod (20) of the nail supporting anti-rotation cylinder (19) is connected to a nail supporting block (22).

3. The screw conveying device according to claim 1, characterized in that: The nail separating mechanism further includes a bit guide plate (23) and a limiting mechanism. The bit guide plate (23) and the limiting mechanism are both arranged at the nail taking station. At the intermittent stop position of the nail separating groove (16) at the nail taking station, a nail taking guide groove (24) is arranged on the nail separating limiting plate (12). A V-shaped groove (25) is arranged on the bit guide plate (23), and the V-shaped groove (25) is inclined. The bottom of the V-shaped groove (25) is on the connection line of the nail taking guide groove (24) and the nail separating groove (16). The limiting mechanism includes a retaining piece (26), a return spring (27), and a limiting screw (28). The retaining piece (26) is arranged at the lower part of the nail separating limiting plate (12). A first rotating shaft (29) is arranged in the middle of the retaining piece (26). One end of the retaining piece (26) is a limiting end, which is arranged as a circular arc concentric with the nail separating disc (13). The end of the limiting end closes the notch of the nail separating groove (16). The other end of the retaining piece (26) is a return end, and the return end is connected to the return spring (27). The limiting screw (28) is arranged on the same side as the return spring (27), and the limiting screw (28) is in contact connection with the return end. A plurality of connection holes (30) with different distances from the first rotating shaft (29) are arranged at the return end. The bit guide plate (23) is provided with a long oval hole in the vertical direction to fix the bit guide plate (23).

4. The screw conveying device according to claim 1, characterized in that: The nail separating mechanism further includes an electric screwdriver guide block (31). The electric screwdriver guide block (31) is provided with a guide hole (32), and the inner wall of the guide hole (32) matches the shape of the bit of the electric screwdriver. The guide hole (32) is arranged directly above the intermittent stop position of the nail separating groove (16) at the nail taking station. The electric screwdriver guide block (31) is fixed by a long oval hole and a bolt in the vertical direction.

5. The screw conveying device according to claim 1, characterized in that: The nail separating mechanism further includes a first material pushing block (33) and a first screw collecting box (34). The first material pushing block (33) is arranged at the intermittent stop position of the nail separating groove (16) at the nail taking station. The bottom of the first screw collecting box (34) is provided with a first flipping box cover (35). The first flipping box cover (35) is connected to the first screw collecting box (34) through a first rotating shaft (36). One end of the first rotating shaft (36) is connected to a first V-shaped return rod (37). One end of a wing plate of the first V-shaped return rod (37) is in contact with a first sensor (38), and the other end of the wing plate is connected to a first closing spring (39). The first closing spring (39) drives the first rotating shaft (36) to keep the first flipping box cover (35) closed with the first screw collecting box (34). The first sensor (38) is in contact with the first V-shaped return rod (37).

6. The screw conveying device according to claim 1, characterized in that: The nail separating mechanism further includes a second feeding block, a second screw collecting box (40), a third screw collecting box (41) and a feeding mechanism; the second feeding block is arranged at the intermittent stop position of the nail separating groove (16) at the nail taking station; the second screw collecting box (40), the feeding mechanism and the third screw collecting box (41) are arranged in parallel in sequence, and the second screw collecting box (40) is arranged at the lower part of the nail separating groove (16); a second flipping box cover (42) is arranged at the bottom of the second screw collecting box (40); the second flipping box cover (42) is connected with the second screw collecting box (40) through a second rotating shaft (43), one end of the second rotating shaft (43) is connected with a second V-shaped reset rod (44), one end of a wing plate of the second V-shaped reset rod (44) contacts a second sensor (45), and the other end of the wing plate is connected with a second closing spring (46); the second closing spring (46) drives the second rotating shaft (43) to keep the second flipping box cover (42) closed with the second screw collecting box (40), and the second sensor (45) contacts the second V-shaped reset rod (44); a third flipping box cover (47) is arranged at the bottom of the third screw collecting box (41); the third flipping box cover (47) is connected with the third screw collecting box (41) through a third rotating shaft (48), one end of the third rotating shaft (48) is connected with a third V-shaped reset rod (49), one end of a wing plate of the third V-shaped reset rod (49) contacts a third sensor (50), and the other end of the wing plate is connected with a third closing spring (51); the third closing spring (51) drives the third rotating shaft (48) to keep the third flipping box cover (47) closed with the third screw collecting box (41), and the third sensor (50) contacts the third V-shaped reset rod (49); the second screw collecting box (40) and the third screw collecting box (41) respectively receive screws with lengths meeting the assembly requirements and screws with lengths not meeting the assembly requirements; the screws fall from the nail separating groove (16), and the movement of the feeding mechanism makes the screws fall into the corresponding screw collecting boxes; the feeding mechanism includes a feeding plate (52), a transmission belt (53) and a driving motor (54), the feeding plate (52) is arranged between the second screw collecting box (40) and the third screw collecting box (41), the feeding plate (52) is connected with a driven wheel, and the driven wheel is connected with the driving motor (54) by belt drive.

7. The screw conveying device according to any one of claims 1-6, characterized in that: The screw conveying device further includes a feeding slide rail and a vibration driving mechanism. The feeding slide rail includes a first feeding plate (55) and a second feeding plate (56). The lower parts of the first feeding plate (55) and the second feeding plate (56) are bolted to a connecting block (57). The width of the feeding slide rail is greater than the diameter of the screw rod body and less than the diameter of the screw head. The upper surfaces of the first feeding plate (55) and the second feeding plate (56) are flat and form an acute angle with the horizontal plane. A receiving wing plate (58) is provided at the higher end of the feeding slide rail. The lower end of the feeding slide rail is connected to the feeding port (15) of the material distributing mechanism. The connecting block (57) is arranged on one side of the middle of the feeding slide rail close to the material distributing mechanism. A second pressing plate (59) is arranged on the upper surface of the feeding slide rail. The second pressing plate (59) is connected to the connecting block (57) through a third connecting plate (60). A fourth long waist hole (61) is arranged vertically on the third connecting plate (60) to adjust the height difference between the second pressing plate (59) and the feeding slide rail. A fifth long waist hole (62) is arranged horizontally on the second pressing plate (59) to adjust the horizontal distance between the second pressing plate (59) and the feeding slide rail in the horizontal direction. A second pair of photoelectric sensors (63) is arranged on the feeding slide rail. A brush mechanism and a blowing mechanism are arranged on the feeding slide rail. The brush mechanism includes a brush (64), a link mechanism (65) and a brush driving motor (66). The output shaft of the brush driving motor (66) is connected to one end of the link mechanism (65), and the other end of the link mechanism (65) is connected to the brush (64). The brush (64) is arranged on the feeding slide rail between the receiving wing plate (58) and the second pressing plate (59). The blowing mechanism includes an air inlet joint (67), an air distribution block (68) and a blowing guide pipe (69). One air inlet and a plurality of air outlets are arranged on the air distribution block (68). The two ends of the air inlet are respectively connected to the air inlet joint (67) and the plurality of air outlets. Each air outlet is connected to a blowing guide pipe (69), and the blowing guide pipe (69) points to the upper part of the feeding slide rail between the receiving wing plate (58) and the second pressing plate (59). A dialing rod (70) is arranged on the feeding slide rail between the receiving wing plate (58) and the second pressing plate (59). The dialing rod (70) points to the direction of screw incoming material or the direction of screw conveying. The upper end of the dialing rod (70) is higher than the upper plane of the track. A cleaning mechanism is provided at the end of the feeding slide rail. The cleaning mechanism includes air holes (71), a first blowing head (72), a second blowing head (73), and a dust suction head (74) provided on a first feeding plate (55) and a second feeding plate (56). The first blowing head (72), the second blowing head (73), and the dust suction head (74) are provided on a bracket (75). A first flexible gasket (76) is provided between the first blowing head (72) and the air hole (71) of the first feeding plate (55). A second flexible gasket (77) is provided between the second blowing head (73) and the second feeding plate (56). The first blowing head (72) and the second blowing head (73) are connected to an air source, and the dust suction head (74) is connected to a vacuum cleaner; The vibration driving mechanism includes a first base (78), an electromagnet (79), an armature (80), a spring plate (81), and a second base (82). The spring plate (81) is inclined at a certain angle and connects the first base (78) and the second base (82). The lower part of the electromagnet (79) is connected to the first base (78). The upper part of the armature (80) is threadedly connected to the lower part of the second base (82). A gap is provided between the lower part of the armature (80) and the upper part of the electromagnet (79). A stop screw (83) in the radial direction of the armature (80) is provided on the second base (82). The second base (82) is connected to a connecting block (57).

8. The screw conveying device according to claim 7, characterized in that: The screw conveying device further includes a feeding hopper. The feeding hopper includes a bin (84), an aggregate rotating wheel (85), and a first driving mechanism (86). The bin (84) is arc-shaped, with one end higher and the other end lower. The lower end is connected to the aggregate rotating wheel (85). The aggregate rotating wheel (85) is connected to the first driving mechanism (86). A dust collecting mechanism is provided on the bin (84) near the aggregate rotating wheel (85). The dust collecting mechanism includes a negative pressure dust suction joint (87), a dust collecting box (88), and a plurality of dust suction holes (89) provided on the panel of the bin (84). One end of the feeding slide rail provided with a receiving wing plate (58) is located above the hopper, and the other part extends outside the hopper.

9. The screw conveying device according to claim 8, characterized in that: A material level detection mechanism is provided at the upper part of the bin (84). The material level detection mechanism includes a first material level sensor (90) and a second material level sensor (91). The first material level sensor (90) is provided at the lowest end face of the lower end of the bin (84). The second material level sensor (91) is provided at the bottom of the feeding slide rail.

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