A combined screw-and-washer device

Abstract

This utility model relates to the field of automated fastener assembly technology in mechanical manufacturing, specifically disclosing a combined screw and washer insertion device, including a base, a stepper motor, a rotating disk located at the output end of the stepper motor, and multiple screw receiving slots formed on the outer wall of the rotating disk; a screw conveying mechanism is provided on one side of the rotating disk, the end of which overlaps the rotating disk and is provided with a baffle plate, the rear end of which forms a discharge port with the end of the screw conveying mechanism, the width of which is the same as the width of the screw receiving slots; a washer conveying mechanism is provided behind the rotating disk, the end of which is located above the rotating disk; this device has a simple and reliable structure, precise positioning, realizes fully automated screw and washer insertion, reduces maintenance costs and material loss, improves production efficiency and yield, is compatible with various specifications of fasteners, and has a wide range of applications.

Description

Technical Field

[0001] This utility model relates to the field of automated fastener assembly technology in mechanical manufacturing, and specifically discloses a combined screw washer insertion device. Background Technology

[0002] In the field of automated screw assembly, the automatic insertion of screws and washers is a key step in improving production efficiency. Several automated washer insertion devices already exist in the prior art. For example, Chinese utility model patent CN212318512U discloses a combined screw washer insertion device. This device uses a drive mechanism to power a transmission mechanism containing a toothed gear and a sprocket, enabling the screw fixed on the chain link to be fed intermittently. A pressing mechanism then presses the washer onto the screw.

[0003] However, analysis revealed the following shortcomings in this type of existing technology, making it difficult to meet the demands for efficient and stable mass production:

[0004] The device relies on the precise meshing of a toothed gear and a sprocket to achieve intermittent motion. This mechanical transmission method involves many components (such as the toothed gear, sprocket, and drive rod), resulting in a complex structure. After long-term operation, wear easily occurs at the meshing points of the gears and sprockets, leading to a decrease in transmission accuracy and even jamming or tooth skipping. This not only increases the equipment's failure rate and maintenance costs but also affects the stability of the production process.

[0005] The existing gasket pressing path lacks an effective adaptive guidance and centering mechanism. Although a hinge block is provided at the bottom of the pressing channel, it is difficult to fully compensate for minor positional deviations caused by manufacturing tolerances or assembly errors when the gasket is fitted into a screw that has moved to a stationary state. This lack of centering can easily cause the gasket to fail to fit accurately into the screw thread during high-speed pressing, resulting in jamming, tilting, or even scratching the screw or damaging the gasket, thus leading to assembly failure and hindering further improvement in the overall yield rate.

[0006] Therefore, there is an urgent need in the field for an automated screw-insertion device with a simpler and more reliable structure that can effectively ensure the alignment of the washer and the screw, in order to solve the above problems. Utility Model Content

[0007] This invention proposes a combined screw and washer insertion device. Through the coordinated design of a rotating disk and an openable bracket, it achieves precise alignment of screws and washers and efficient washer insertion, significantly improving assembly efficiency, yield, and equipment operation stability.

[0008] This utility model is implemented as follows: a combined screw-wafer insertion device includes a base, on which a stepper motor, a rotating disk located at the output end of the stepper motor, and multiple screw receiving slots formed on the outer wall of the rotating disk are mounted. A screw conveying mechanism is provided on one side of the rotating disk, with its end overlapping the rotating disk and equipped with a baffle plate. A discharge port is formed between the rear end of the baffle plate and the end of the screw conveying mechanism, the width of which is the same as the width of the screw receiving slots. A washer conveying mechanism is provided behind the rotating disk, with its end located above the rotating disk. A gantry frame is provided at the top of the end of the washer conveying mechanism, and a lifting device is provided in front of the gantry frame. The output end of the lifting device has a hollow structure and an open push tube at its lower end. Two L-shaped supports are symmetrically arranged at the end of the washer conveying mechanism, with their horizontal ends facing each other. A gasket bearing groove is provided on the side facing the end of the gasket conveying mechanism. The rear end of the gasket bearing groove is open, and the lower part of the gasket bearing groove is in the same plane as the gasket conveying mechanism, with the same width as the gasket conveying mechanism. The rear of the horizontal part of the bracket is hinged to the gantry frame. Both sides of the gantry frame are provided with return springs, and the other end of the return springs is connected to the vertical part of the bracket. The push tube is located above the gasket bearing grooves of the two brackets, and the diameter of the push tube is the same as the width of the gasket bearing groove. The bottom of the bracket is higher than the height of the screw to be inserted. A first arc-shaped guide plate is provided between the screw conveying mechanism and the gasket conveying mechanism, which is in contact with the outer wall of the rotating disk. A downwardly arranged guide groove is provided on the right side of the rotating disk. A second arc-shaped guide plate is provided between the guide groove and the gasket conveying mechanism, which is in contact with the outer wall of the rotating disk. A guide plate is provided above the rotating disk and the guide groove. The guide plate is used to push the screw from the screw receiving groove into the guide groove.

[0009] As a preferred embodiment of the combined screw-insertion device of this utility model, the screw receiving grooves of the rotating disk are evenly distributed circumferentially, and the depth of the screw receiving grooves is consistent with the thickness of the screw head, so as to ensure that the screw is inserted upright.

[0010] As a preferred embodiment of the combined screw conveying device of this utility model, both the screw conveying mechanism and the washer conveying mechanism are belt conveyors, and the screw conveying mechanism has positioning strips on both sides of the conveying surface, while the washer conveying mechanism has a flat surface.

[0011] As a preferred embodiment of the combined screw-insertion device of this utility model, the lifting device is a cylinder or an electric push rod, and the lower end face of the push tube is provided with an elastic washer to buffer the contact with the washer.

[0012] In a preferred embodiment of the combined screw-insertion device of this utility model, the width of the gasket bearing groove of the bracket matches the outer diameter of the gasket, and the depth of the gasket bearing groove is less than the thickness of the gasket, so as to ensure that the gasket protrudes to facilitate the downward pressing of the push tube.

[0013] In a preferred embodiment of the combined screw-insertion device of this utility model, the inner arc surfaces of the first and second arc guide plates are fitted with the outer wall of the rotating disk with a clearance of less than 0.5 mm to prevent the screw from dislodging from the screw receiving groove.

[0014] As a preferred embodiment of the combined screw-insertion device of this utility model, the outlet of the guide channel is connected to a collection box or the next process equipment, and the inclination angle of the guide channel is 30°-60° to facilitate the screw slipping off.

[0015] The beneficial effects of this utility model are:

[0016] 1. The intermittent feeding of screws is achieved through stepper motors, rotary disks, and arc-shaped guide plates, resulting in fewer parts and a shorter transmission path. This reduces jamming problems caused by gear meshing wear, thereby lowering equipment failure rates and maintenance costs.

[0017] 2. The screw is positioned upright by adapting the dimensions of the positioning groove and receiving groove of the conveying mechanism. The gasket is accurately received by matching the dimensions of the bearing groove. The coaxial design of the push tube, receiving groove and bearing groove, together with the elastic washer buffer, effectively compensates for manufacturing and assembly errors, avoids gasket jamming, tilting or screw scratching, and significantly improves the gasket insertion yield.

[0018] 3. From the automatic feeding and precise placement of screws / washers to the automatic removal of screws after washer insertion, the entire process requires no manual intervention. Furthermore, the guide channel can directly connect to the next process, adapting to the needs of mass production and significantly improving production cycle time. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0021] Figure 2 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0022] Figure 3 This utility model Figure 1 A magnified structural diagram at point B in the middle.

[0023] Figure 4 This is a front view schematic diagram of the lifting device and support of this utility model.

[0024] Figure 5 This is a top view of the bracket and gasket bearing groove of this utility model.

[0025] The markings in the diagram are: 1. Base; 2. Stepper motor; 3. Rotary disk; 4. Screw receiving slot; 5. Screw conveying mechanism; 6. Baffle plate; 7. Discharge port; 8. Gasket conveying mechanism; 9. Gantry frame; 10. Lifting device; 11. Push tube; 12. Support; 13. Gasket bearing slot; 14. Return spring; 15. First arc-shaped guide plate; 16. Guide channel; 17. Second arc-shaped guide plate; 18. Guide plate; 19. Positioning strip; 20. Elastic washer. Detailed Implementation

[0026] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0027] Please see Figure 1-5A combined screw-and-washer device includes a base 1, on which a stepper motor 2, a rotating disk 3 located at the output end of the stepper motor 2, and multiple screw receiving slots 4 formed on the outer wall of the rotating disk 3 are mounted. A screw conveying mechanism 5 is provided on one side of the rotating disk 3, with its end overlapping the rotating disk 3 and having a baffle plate 6 at its end. A discharge port 7 is formed between the rear end of the baffle plate 6 and the end of the screw conveying mechanism 5, the width of which is the same as the width of the screw receiving slots 4. A washer conveying mechanism 8 is provided behind the rotating disk 3, with its end located above the rotating disk 3. A gantry frame 9 is provided at the top of the end of the washer conveying mechanism 8, and a lifting device 10 is provided in front of the gantry frame 9. The output end of the lifting device 10 has a hollow structure and an open lower push tube 11. Two L-shaped supports 12 are symmetrically arranged at the end of the washer conveying mechanism 8, with their horizontal ends facing each other and opening towards the end of the washer conveying mechanism 8. The gasket bearing groove 13 has an open rear end, and its lower interior is in the same plane as the gasket conveying mechanism 8, with the same width. The horizontal part of the support 12 is hinged to the gantry 9 at its rear. Both sides of the gantry 9 are equipped with return springs 14, the other end of which is connected to the vertical part of the support 12. The push tube 11 is located above the gasket bearing grooves 13 of the two supports 12, and its diameter is the same as the width of the gasket bearing groove 13. The bottom of the bracket 12 is higher than the height of the screw to be inserted; a first arc-shaped guide plate 15 is provided between the screw conveying mechanism 5 and the gasket conveying mechanism 8, which is in contact with the outer wall of the rotating disk 3; a downwardly arranged guide groove 16 is provided on the right side of the rotating disk 3; a second arc-shaped guide plate 17 is provided between the guide groove 16 and the gasket conveying mechanism 8, which is in contact with the outer wall of the rotating disk 3; a guide plate 18 is provided above the rotating disk 3 and the guide groove 16, and the guide plate 18 is used to push the screw from the screw receiving groove 4 into the guide groove 16.

[0028] In this embodiment: the screw conveying mechanism 5 conveys the vertically arranged screws to the end, and through the discharge port 7 formed by the baffle plate 6, whose width is the same as the screw receiving groove 4, a screw is accurately dropped into the screw receiving groove 4 of the rotating disk 3; at the same time, the gasket conveying mechanism 8 conveys the gasket to the end and makes it slide accurately into the gasket bearing groove 13 of the two symmetrically arranged L-shaped brackets 12; when the receiving groove carrying the screw rotates to directly below the bracket 12, the lifting device 10 is activated, pushing the push tube 11 downward. The push tube 11 first contacts and presses the gasket, and then continues to move downward to press the two brackets 12, so that they overcome the return spring. The force of 14 flips outward and opens, making way for the passage; at this time, the push tube 11 continues to press the gasket down, accurately fitting it onto the screw rod directly below it; after the gasket is inserted, the lifting device 10 drives the push tube 11 to rise, and the elastic force of the return spring 14 pulls the two L-shaped brackets 12 to reset and close, ready to receive the next gasket; the screw with the gasket inserted continues to rotate with the rotating disk 3, and moves smoothly to the gasket insertion station under the protection of the first arc-shaped guide plate 15, and moves to the unloading station under the protection of the second arc-shaped guide plate 17, and finally the guide plate 18 pushes it into the inclined guide groove 16, slides into the collection device, and completes the entire automated process.

[0029] As a technical optimization of this utility model, the screw receiving groove 4 of the rotating disk 3 is evenly distributed along the circumference, and the depth of the screw receiving groove 4 is consistent with the thickness of the screw head, so as to ensure that the screw is inserted upright.

[0030] In this embodiment: the screw is kept upright and stably locked on the rotating disk 3 to prevent the screw from tilting or falling off during the conveying process, thereby improving the screw conveying and positioning accuracy.

[0031] As a technical optimization of this utility model, both the screw conveying mechanism 5 and the gasket conveying mechanism 8 are belt conveyors, and the screw conveying mechanism 5 has positioning strips 19 on both sides of the conveying surface, while the conveying surface of the gasket conveying mechanism 8 is a flat surface.

[0032] In this embodiment: the screws are arranged and transported in an orderly manner by forming positioning grooves through positioning strips 19, and the gaskets are transported stably through flat surfaces, which respectively adapts to the different transport requirements of screws (which need to be oriented) and gaskets (which need to be laid flat), reducing the phenomenon of jamming during the transport process.

[0033] As a technical optimization of this utility model, the lifting device 10 is a cylinder or an electric push rod, and the lower end face of the push tube 11 is provided with an elastic washer 20 to buffer the contact with the pad.

[0034] In this embodiment, the cylinder / electric push rod can provide stable downward pressure, and the elastic washer 20 can buffer the contact force between the push tube 11 and the gasket, preventing the gasket from being crushed or deformed, and improving the safety and stability of the gasket process.

[0035] As a technical optimization of this utility model, the width of the gasket bearing groove 13 of the bracket 12 matches the outer diameter of the gasket, and the depth of the gasket bearing groove 13 is less than the thickness of the gasket, so as to ensure that the gasket part protrudes to facilitate the downward pressing of the push tube 11.

[0036] In this embodiment: the gasket is accurately positioned in the bearing groove, and the partially protruding structure facilitates the push tube 11 to quickly contact and press down on the gasket, avoiding the gasket from shifting in the bearing groove and causing misalignment of the sleeve.

[0037] As a technical optimization of this utility model, the inner arc surfaces of the first arc-shaped guide plate 15 and the second arc-shaped guide plate 17 are fitted with the outer wall of the rotating disk 3 with a clearance of less than 0.5mm to prevent the screw from dislodging from the screw receiving groove 4.

[0038] In this embodiment, the screw is prevented from falling out of the receiving groove by a very small gap, ensuring that the screw is stably conveyed throughout the entire process of "screw conveying mechanism 5, sleeve station, and guide channel 16", thereby reducing screw loss due to falling.

[0039] As a technical optimization of this utility model, the outlet of the guide channel 16 is connected to a collection box or the next process equipment, and the inclination angle of the guide channel 16 is 30°-60° to facilitate the screw to slip off.

[0040] In this embodiment, the screws after being threaded through the pad can quickly slide down to the collection box through the inclined guide channel 16 or directly enter the next process without manual transfer, thereby improving the overall production cycle and adapting to the needs of assembly line operations.

[0041] Working principle and usage process of this utility model:

[0042] The screw conveying mechanism 5 is activated, and the screws are conveyed in an inverted and orderly manner under the guidance of the positioning groove on the conveying surface. When they reach the end, they are limited by the baffle plate 6 and fall one by one into the screw receiving groove 4 of the rotating disk 3 through the discharge port 7. The stepper motor 2 drives the rotating disk 3 to rotate at a constant speed with the screws in the screw receiving groove 4. Simultaneously, the gasket conveying mechanism 8 is activated, and the gaskets are conveyed flat to the end under the action of the flat conveying surface and fall into the gasket bearing groove 13 of the two L-shaped brackets 12. When the rotating disk 3 transfers the screws to the area below the L-shaped brackets 12, the stepper motor 2 pauses briefly, and the lifting device 10 drives the push tube 11 downward. The push tube 11 moves and squeezes the gasket, causing the L-shaped bracket 12 to rotate outward. The gasket is pushed out of the bearing groove by the push tube 11 and fitted into the screw rod. After the gasket is fitted, the push tube 11 returns to its original position, and the L-shaped bracket 12 returns to its original position under the action of the return spring 14. The stepper motor 2 restarts, and the rotating disk 3 drives the screw with the gasket fitted to continue rotating. After passing the second arc-shaped guide plate 17, the guide plate 18 pushes the screw from the receiving groove into the guide groove 16. The screw slides down the guide groove 16, which is inclined at 30°-60°, to the collection box or the next process. The above steps are repeated to realize the continuous and automated fitting of the screw and gasket.

[0043] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and 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, they should not be construed as limitations on this utility model.

[0044] However, the above are merely specific embodiments of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A combined screw-through washer device, comprising a base (1), characterized in that: The base (1) is provided with a stepper motor (2), a rotating disk (3) located at the output end of the stepper motor (2), and a plurality of screw receiving slots (4) formed on the outer wall of the rotating disk (3); a screw conveying mechanism (5) is provided on one side of the rotating disk (3), the end of the screw conveying mechanism (5) overlaps the top of the rotating disk (3), and a baffle plate (6) is provided at the end. The rear end of the baffle plate (6) and the end of the screw conveying mechanism (5) form a discharge port (7), the width of the discharge port (7) is the same as the width of the screw receiving slot (4); a gasket is provided behind the rotating disk (3). The conveying mechanism (8) has its end located above the rotary disk (3), and a gantry frame (9) is provided at the top of the end of the gasket conveying mechanism (8). A lifting device (10) is provided in front of the gantry frame (9). The output end of the lifting device (10) has a hollow structure and an open push tube (11) at the bottom. Two L-shaped supports (12) are symmetrically provided at the end of the gasket conveying mechanism (8). The horizontal ends of the two supports (12) are arranged opposite each other, and the horizontal ends are opened with gasket bearing grooves (13) facing the end of the gasket conveying mechanism (8). The rear end of the gasket bearing groove (13) is open, and the lower part of the gasket bearing groove (13) is in the same plane as the gasket conveying mechanism (8), and the width is the same as that of the gasket conveying mechanism (8); the rear of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and both sides of the gantry frame (9) are provided with return springs (14), and the other end of the return springs (14) is connected to the vertical part of the bracket (12); the push tube (11) is located above the gasket bearing groove (13) of the two brackets (12), and the diameter of the push tube (11) is the same as the width of the gasket bearing groove (13); the bracket (12) is open, and the rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and the gantry frame (9) is provided with return springs (14) on both sides, and the other end of the return springs (14) is connected to the vertical part of the bracket (12); ... rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and the rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and the rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and the rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9), and the rear end of the horizontal part of the bracket (12) is hinged to the gantry frame (9 2) The bottom is higher than the height of the screw to be inserted; a first arc-shaped guide plate (15) is provided between the screw conveying mechanism (5) and the gasket conveying mechanism (8) and is in contact with the outer wall of the rotating disk (3); a downwardly arranged guide groove (16) is provided on the right side of the rotating disk (3); a second arc-shaped guide plate (17) is provided between the guide groove (16) and the gasket conveying mechanism (8) and is in contact with the outer wall of the rotating disk (3); a guide plate (18) is provided above the rotating disk (3) and the guide groove (16); the guide plate (18) is used to push the screw from the screw receiving groove (4) into the guide groove (16).

2. The combined screw washer device according to claim 1, characterized in that: The screw receiving grooves (4) of the rotating disk (3) are evenly distributed circumferentially, and the depth of the screw receiving grooves (4) is consistent with the thickness of the screw head to ensure that the screw is inserted upright.

3. The combined screw washer device according to claim 1, characterized in that: Both the screw conveying mechanism (5) and the gasket conveying mechanism (8) are belt conveyors, and the screw conveying mechanism (5) has positioning strips (19) on both sides of the conveying surface, while the gasket conveying mechanism (8) has a flat surface.

4. The combined screw washer device according to claim 1, characterized in that: The lifting device (10) is a cylinder or an electric push rod, and the lower end face of the push tube (11) is provided with an elastic washer (20) to buffer the contact with the pad.

5. A combined screw washer insertion device according to claim 1, characterized in that: The width of the gasket bearing groove (13) of the bracket (12) matches the outer diameter of the gasket, and the depth of the gasket bearing groove (13) is less than the thickness of the gasket, so as to ensure that the gasket protrudes to facilitate the downward pressing of the push tube (11).

6. The combined screw washer insertion device according to claim 1, characterized in that: The inner arc surfaces of the first arc guide plate (15) and the second arc guide plate (17) are fitted with the outer wall of the rotating disk (3) with a clearance of less than 0.5 mm to prevent the screw from coming out of the screw receiving groove (4).

7. A combined screw washer insertion device according to claim 1, characterized in that: The outlet of the guide channel (16) is connected to a collection box or the next process equipment, and the inclination angle of the guide channel (16) is 30°-60° to facilitate the screw to slip off.

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