Automatic screw feeding mechanism of automatic assembly equipment for automobile screws, foam gaskets

Abstract

The utility model relates to an automatic screw feeding mechanism of automatic assembly equipment for automobile screw foam washers, which is characterized in that after screws are directionally sorted through a vibration disc, a straight vibration mechanism conveys the screws to a notch position of a staggered arrangement plate along a linear path, and the staggered arrangement plate is driven by an arrangement driving mechanism horizontally in a reciprocating manner to feed the screws into the staggered arrangement plate. According to the automatic screw feeding mechanism, through transverse sliding, gaps of an arrangement groove of the automatic screw feeding mechanism are periodically communicated with a straight vibration mechanism, screws are received one by one and transversely arranged into a preset queue, and finally the arranged screws are transferred to a screw positioning base of a workbench in batches through a screw feeding assembly. The manual dependence is remarkably reduced, the process consistency is guaranteed, the large-scale production requirements of automobile screw waterproof and damping scenes are met, and the assembly efficiency and the yield of screws are greatly improved.

Description

Technical Field

[0001] The utility model relates to the field of automatic ferrules for automobile screws, in particular to an automatic screw feeding mechanism for automatic assembly equipment of automobile screw foam washers. Background Art

[0002] In the field of automobile manufacturing, some key connection parts (such as stud screws on roof racks and fixing screws for new energy battery boxes) need to have both structural strength and sealing and shock-absorbing functions. Such automobile screws usually need to be fitted with foam washers on the external threaded section to utilize their elastic compression characteristics to achieve waterproofing, shock absorption and stress buffering requirements. Such washers are currently mainly installed manually due to their soft material and small size to ensure their integrity and assembly position accuracy.

[0003] However, the current manual sleeve operation has significant shortcomings: first, manual operation efficiency is low and the process controllability is insufficient. The foam gasket is prone to tearing due to uneven force during the sleeve operation, resulting in deterioration of sealing performance and increased rework rate. Second, the existing automated equipment is limited by the low strength characteristics of the foam material, and it is difficult to achieve stable grasping and precise positioning, resulting in limited yield improvement. In addition, due to the stickiness of the foam gasket, it is inevitable to touch the glue area during manual sleeve operation, resulting in reduced viscosity, affecting the quality of the entire finished product. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide a screw automatic feeding mechanism for an automatic assembly device for automobile screw foam washers in view of the deficiencies of the above-mentioned prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic screw feeding mechanism of an automated assembly equipment for automotive screw foam washers, comprising a workbench, a plurality of screw positioning seats being arranged on the workbench, a plurality of positioning holes for accommodating screws being arranged on the screw positioning seats, a screw conveying assembly for conveying screws and a screw feeding assembly for conveying the screws on the screw conveying assembly to the screw positioning seats being arranged on one side of the workbench, the screw conveying assembly comprising a vibration plate, a direct vibration mechanism and a screw arranging mechanism, the screw arranging mechanism comprising an arranging partition, an offset arranging plate arranged at one end of the arranging partition away from the direct vibration mechanism, and an arranging driving mechanism for driving the offset arranging plate to slide back and forth horizontally along the arranging partition, a plurality of screw arranging grooves arranged in a transverse manner are arranged on the offset arranging plate, the screw arranging grooves each having a notch at one end facing the arranging partition that can be connected to the direct vibration mechanism, one end of the direct vibration mechanism is connected to the vibration plate, and the screws screened in the vibration plate are fed one by one into the offset arranged screw arranging groove plate through the notch.

[0006] By adopting the above technical scheme, the workbench can be a turntable or a conveyor belt or other platforms that can be used for subsequent processing. After the screws are directionally sorted by the vibration disk, the direct vibration mechanism conveys the screws along a linear path to the notch position of the offset arrangement plate. Under the horizontal reciprocating drive of the arrangement drive mechanism, the offset arrangement plate slides horizontally to make the notch of the arrangement groove periodically connected to the direct vibration mechanism, receives the screws one by one and arranges them horizontally into a preset queue, and finally the screw feeding assembly transfers the arranged screws in batches to the screw positioning seat of the workbench. The dynamic notch alignment mechanism of the offset arrangement plate realizes orderly arrangement of the screws to avoid overlapping or jamming. The multi-slot layout of the horizontal arrangement groove supports batch synchronous transfer, which improves the loading efficiency. The vibration disk and the direct vibration mechanism work together to ensure the directional conveying of the screws. Stable sorting of special-shaped screws, lateral sliding control of the offset arrangement plate and the arrangement groove structure design ensure the consistency of the screw posture, the multi-hole design of the screw positioning seat supports batch synchronous processing and improves assembly efficiency. The overall screw automatic feeding mechanism uses an automated screw feeding process to significantly reduce manual dependence and ensure process consistency, meet the large-scale production needs of automotive screw waterproofing and shock absorption scenarios, and greatly improve the assembly efficiency and yield of screws. It should be mentioned that in the absence of an entry-blocking cylinder, the direct vibration mechanism can directly enter the screw arrangement groove of the offset arrangement plate. As long as it can fall directly after entering the screw arrangement groove, it can be sorted without affecting the subsequent lateral movement arrangement. At this time, you only need to stop the direct vibration mechanism to solve the jamming problem.

[0007] Furthermore, the arrangement partition is provided with a screw entry hole connected to the direct vibration mechanism, and an entry blocking cylinder is provided at the arrangement partition corresponding to the screw entry hole. An entry blocking plate is provided at the output end of the entry blocking cylinder, and the entry blocking cylinder drives the entry blocking plate to approach or move away from the screw entry hole, thereby blocking and releasing the screw at the screw entry hole.

[0008] By adopting the above technical scheme, in order to avoid the direct vibration mechanism from frequently stopping when the screw arrangement slot is full and waiting to be clamped, a screw entry hole connected to the direct vibration mechanism is opened on the arrangement partition plate, and the entry baffle cylinder drives the entry baffle plate close to or away from the screw entry hole to dynamically block or release the path of the screw entering the offset arrangement plate. When the screw arrangement slot is full and waiting to be clamped, the baffle plate blocks the channel to suspend the entry of the screw. After the arrangement slot is in place, the baffle plate retreats to release the screw, so that the screws enter the arrangement slot one by one in a beat. Through the opening and closing actions of the entry baffle cylinder and the baffle plate, the rhythm of the screws entering the arrangement slot is precisely controlled to avoid jamming or overlapping caused by excessive screw influx. The physical limit mechanism of the baffle plate ensures the stability of screw transportation when the direct vibration mechanism is continuously feeding, reduces equipment shutdown caused by disordered accumulation, and improves the reliability of the automation process.

[0009] Furthermore, the arrangement drive mechanism is a linear drive module, and the output end of the linear drive module is connected to the offset arrangement plate, thereby driving the offset arrangement plate to slide back and forth laterally.

[0010] By adopting the above technical solution, the linear drive module is rigidly connected to the offset arrangement plate through its output end, driving the offset arrangement plate to slide back and forth along the lateral direction of the arrangement partition. The sliding stroke of the offset arrangement plate is controlled by the motion parameters of the linear drive module (such as speed and displacement), so that the gap of the arrangement groove is periodically aligned with the screw path conveyed by the direct vibration mechanism, so that the screws enter the arrangement groove one by one. The high-precision linear motion control of the linear drive module ensures the accurate lateral sliding position of the offset arrangement plate, and ensures the periodic and accurate docking between the gap of the arrangement groove and the screw conveying path to avoid screw leakage or dislocation. The reciprocating mechanism of lateral sliding supports continuous feeding, adapts to the beat requirements of the automated assembly line, and improves the efficiency and stability of screw arrangement.

[0011] Furthermore, an anti-tilt baffle is provided on the side of the arrangement partition corresponding to the screw entry hole away from the direct vibration mechanism. The anti-tilt baffle is arranged above the offset arrangement plate and there is an offset movable gap between the anti-tilt baffle and the screw entry hole.

[0012] By adopting the above technical scheme, an anti-roll baffle is arranged on the side of the arrangement partition away from the direct vibration mechanism. The anti-roll baffle is located above the offset arrangement plate, and an offset movable gap is reserved between the anti-roll baffle and the screw entry hole. The inclination angle of the screw when entering the arrangement slot is limited by physical limiting. When the screw enters the arrangement slot from the direct vibration mechanism through the entry hole, the blocking effect of the anti-roll baffle constrains the front-stage impact force of the screw, so that it maintains a vertical or preset posture to enter the arrangement slot. At the same time, the offset movable gap allows the offset arrangement plate to slide laterally without mechanical interference with the anti-roll baffle. The limiting effect of the anti-roll baffle prevents the screw from tilting or tipping due to inertia or vibration, ensures the consistency of the posture of the screw entering the arrangement slot vertically, maintains the smoothness and stability of the mechanism operation, and reduces jamming or wear caused by mechanical interference.

[0013] Furthermore, the screw feeding assembly includes a screw feeding rack arranged on one side of the turntable, a feeding transverse movement cylinder arranged on the screw feeding rack, a feeding lifting plate arranged at the output end of the feeding transverse movement cylinder, a feeding lifting cylinder arranged on the feeding lifting plate, and a feeding finger cylinder arranged at the output end of the feeding lifting cylinder. The output end of the feeding finger cylinder is provided with two relatively arranged screw clamps, and a plurality of screw clamping grooves are correspondingly formed between the screw clamps. The feeding finger cylinder is driven by the feeding transverse movement cylinder and the feeding lifting cylinder to synchronously transfer a plurality of screws on the staggered arrangement plate to the screw positioning seat.

[0014] By adopting the above technical scheme, the screw feeding assembly drives the feeding lifting plate to move horizontally to the top of the offset arrangement plate through the feeding transverse movement cylinder, and the feeding lifting cylinder controls the feeding finger cylinder to descend vertically, and the clamping slot is aligned with the screw in the arrangement slot. The feeding finger cylinder drives the two oppositely arranged screw clamps to close, and multiple screws in the arrangement slot are grabbed in batches through the clamping slot. Then the feeding transverse movement cylinder and the lifting cylinder work together to transfer the screws horizontally and vertically lower them into the positioning holes of the screw positioning seats of the turntable to complete the synchronous transfer. The compound movement of the transverse movement cylinder and the lifting cylinder realizes efficient coordination of screw grabbing and transfer. The symmetrical layout of the clamping slot is adapted to the stable clamping of screws of different diameters. The multi-screw synchronous transfer mechanism (grabbing 4-8 screws at a time) significantly improves the feeding efficiency and reduces the waiting time of the turntable or conveyor belt. The precise alignment design of the clamping slot ensures that the screws are vertically inserted into the positioning holes to avoid poor assembly caused by posture deviation.

[0015] Furthermore, the direct vibration mechanism includes a linear vibrator and a screw conveying rack and a screw screening plate arranged above the linear vibrator. A screw screening channel for linearly conveying screws is provided between the screw conveying rack and the screw screening plate. One end of the screw screening channel is connected to the vibration disk, and the other end is connected to the screw entry hole.

[0016] By adopting the above technical scheme, the direct vibration mechanism drives the upper screw conveying rack through a linear vibrator to generate directional vibration. The screw screening channel formed between the screw conveying rack and the screw screening plate conveys the screws output by the vibration disk to the screw entry holes along a straight path. One end of the screw screening channel is connected to the vibration disk to receive the screened screws, and the other end is connected to the screw entry holes of the arrangement partition. The linear vibration of the vibrator forces the screws to move in a preset direction in the screening channel, ensuring that the screws enter the arrangement slot in a uniform posture. The linear vibration conveying mechanism of the screw screening channel constrains the moving trajectory of the screws to avoid posture deviation or accumulation, and ensures the stability of continuous directional conveying of the screws. The connection design between the screening channel and the vibration disk improves the screening efficiency, reduces manual intervention, ensures that the screws enter the subsequent arrangement process in the correct direction, and adapts to the automated processing requirements of special-shaped screws.

[0017] Furthermore, a screw turning mechanism is provided between the screw feeding assembly and the offset arrangement plate, which clamps and turns over multiple screws on the offset arrangement plate and then provides them for the screw feeding assembly to clamp and feed. The screw turning mechanism includes a screw turning frame arranged on one side of the offset arrangement plate, a turning and lifting cylinder arranged on the screw turning frame, a screw rotating cylinder arranged at the output end of the turning and lifting cylinder, and a turning finger cylinder arranged at the output end of the screw rotating cylinder. The turning finger cylinder is arranged above the offset arrangement plate, and the output end of the turning finger cylinder is provided with two relatively arranged screw clamping plates, and a plurality of screw clamping notches are correspondingly formed between the screw clamping plates.

[0018] By adopting the above technical solution, the screw flipping mechanism drives the flipping finger cylinder to rise vertically to the top of the offset arrangement plate through the flipping lifting cylinder, and the clamping slot is precisely aligned with the screw in the arrangement slot. After the flipping finger cylinder closes the clamp plate to grab multiple screws, the screw rotating cylinder drives the flipping finger cylinder to rotate 180°, and adjusts the screw from its original posture to a direction suitable for the loading component to grab and insert it into the positioning seat for the subsequent foam gasket attachment. The flipping lifting cylinder then lifts and moves to the clamping station of the screw loading component, releasing the screw for the loading component to be transferred to the positioning seat. The flipping mechanism realizes automatic adjustment of the screw posture through lifting and rotating actions, solving the problem that special-shaped screws (such as double-headed screws on car luggage racks) need to be flipped due to structural asymmetry. The symmetrical layout of the clamping slot and the rotation angle control ensure that there is no slippage or deflection during the screw flipping process, adapting to the grabbing requirements of subsequent loading components, and improving the continuity and yield of the automation process.

[0019] Furthermore, the screw clamps each have V-shaped clamps that are arranged opposite to each other, and a screw clamping groove for clamping a screw is formed between the two V-shaped clamps.

[0020] By adopting the above technical scheme, a screw clamping groove is formed between two oppositely arranged V-shaped clamps of the screw clamp. Through the symmetrical inclined structure of the V-shaped surface, the screw contacts the inclined surfaces on both sides of the V-shaped clamp during the clamping process, and the geometric constraint of the V-shaped clamp is used to limit the radial displacement of the screw. When clamping, the outer diameter of the screw forms two-point contact or line contact with the V-shaped surface to ensure that the screw is centered in the clamping groove. The V-shaped clamp is designed to adapt to screws of different diameters (based on adaptive contact of the V-shaped surface) to avoid unstable clamping caused by screw size tolerance. The symmetrical structure of the V-shaped clamp reduces local pressure on the screw surface during clamping to prevent thread damage. The two-point / line contact mechanism improves the clamping accuracy, ensures that the screw has no posture deviation during the transfer process, and adapts to high-precision assembly requirements.

[0021] Furthermore, the screw clamp is provided with a clamp threaded portion at the position corresponding to the V-shaped clamping opening, and the clamp threaded portion is provided with a plunger screw threadedly connected to the clamp threaded portion.

[0022] By adopting the above technical scheme, a clamping plate threaded portion is opened at the V-shaped clamp of the screw clamp, and the plunger screw is installed through a threaded connection. The depth of the plunger screw inserted into the clamping groove is adjusted by rotating the plunger screw. When clamping screws of different diameters, the protruding length of the plunger screw can be adjusted manually, and it cooperates with the V-shaped clamp to form a variable clamping space. The end face of the plunger screw contacts the outer diameter of the screw to assist the V-shaped clamp in clamping and positioning the screw. The thread adjustment mechanism of the plunger screw adapts to the clamping requirements of screws of different diameters. The gap between the V-shaped clamp and the screw is filled by adjusting the protruding length to prevent the screw from shaking or slipping during clamping. The synergistic effect of the plunger screw and the V-shaped clamp enhances the clamping stability.

[0023] Furthermore, the screw rotating cylinder includes a rotating cylinder body, a rotating output shaft installed at the output end of the rotating cylinder body, and a rotating protrusion mounted on the outside of the rotating output shaft and rotating with the rotating output shaft. The flip finger cylinder is installed on the rotating output shaft, and a hydraulic buffer is provided at each end of the rotating cylinder body. The hydraulic buffers are respectively arranged at both ends of the rotation path of the rotating protrusion.

[0024] By adopting the above technical scheme, the screw rotating cylinder drives the rotating output shaft to rotate by rotating the cylinder body, thereby driving the rotating protrusion mounted on the outside of the output shaft and the flip finger cylinder to rotate synchronously. The hydraulic buffers are respectively arranged at both ends of the rotation path of the rotating protrusion. When the rotating protrusion rotates to the end of the stroke, it contacts the hydraulic buffer and absorbs the rotational inertia impact through hydraulic damping. The rotation angle of the rotating output shaft is limited by the contact position of the rotating protrusion and the hydraulic buffer, thereby realizing precise angular positioning of the flip finger cylinder (such as 180° flipping) and ensuring the accuracy of the screw clamping posture adjustment. The hydraulic buffer effectively reduces the mechanical impact and noise when the rotating protrusion reaches the end of the stroke, reduces component wear, extends the service life of the cylinder, avoids the screw posture deviation caused by inertial overshoot, and improves the stability and reliability of the flipping action.

[0025] The utility model is further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a three-dimensional schematic diagram of an embodiment of the utility model.

[0027] Figure 2 This is a schematic diagram of the structure of the embodiment of the utility model without the workbench.

[0028] Figure 3 It is a three-dimensional schematic diagram and a partial enlarged diagram of the screw conveying assembly according to an embodiment of the utility model.

[0029] Figure 4 It is a partial cross-sectional view of the screw delivery assembly according to an embodiment of the utility model.

[0030] Figure 5 It is a structural schematic diagram of the screw turning mechanism according to an embodiment of the utility model.

[0031] Figure 6 It is a cross-sectional schematic diagram of the screw turning mechanism according to an embodiment of the utility model.

[0032] Figure 7 It is a structural schematic diagram of the screw feeding assembly of an embodiment of the utility model.

[0033] Figure 8 It is a structural schematic diagram of the feeding finger cylinder of an embodiment of the utility model.

[0034] Fig. 9 It is a cross-sectional schematic diagram of the feeding finger cylinder according to an embodiment of the utility model.

[0035] Fig.10 This is a schematic diagram of the structure of the screw and the foam gasket after being assembled in the embodiment of the utility model.

[0036] Fig.11 This is a diagram showing the effect of an embodiment of the utility model when used on an automated assembly device for automobile screw foam washers. DETAILED DESCRIPTION

[0037] like Figure 1-Figure 11 As shown, an automatic screw feeding mechanism of an automated assembly equipment for automotive screw foam washers includes a turntable 1, a plurality of screw positioning seats 11 are provided on the turntable 1, a plurality of positioning holes 111 for accommodating screws A are provided on the screw positioning seats 11, a screw conveying assembly for conveying screws A and a screw feeding assembly 2 for conveying screws A on the screw conveying assembly to the screw positioning seats 11 are provided on one side of the turntable 1, the screw conveying assembly includes a vibration plate 3, a direct vibration mechanism 4 and a screw arranging mechanism 5, a screw turning mechanism 6 is provided between the screw feeding assembly 2 and the screw arranging mechanism 5, which clamps and turns the plurality of screws A on the screw arranging mechanism 5 180° and then clamps and transports them to the turntable 1 for feeding by the screw feeding assembly 2, and then the screw positioning seats 11 loaded with screws A on the turntable 1 are rotated to the subsequent step for the assembly operation of the foam washers B, thereby realizing automated batch feeding of screws A.

[0038] In some embodiments, the automatic screw feeding mechanism of the present invention is applicable to Fig.10 The screws shown are set as double-headed screws for mounting a car luggage rack bracket and a roof, wherein both ends of the screw A are threaded portions A1, a truncated cone-shaped washer fitting portion A2 is provided in the middle, and a square screw head A3 is provided at the threaded portion A1 at one end, so that the washer fitting portion A2 faces the screw head A3 and can be configured as a circular plane A21 for the foam washer B to fit and abut against, and the other side of the washer fitting portion A2 has an outer diameter that gradually converges toward the threaded portion A1 to form a conical inclined portion A22, so that the foam washer B can be stably fitted on the surface of the circular plane A21, and the threaded connection surface between the roof and the luggage rack is shock-absorbing and waterproof, so it is necessary to add a screw flipping mechanism 6, so that the screw conveying assembly of this type of screw A is more stable when adapted, and it is easier to insert it into the screw positioning seat 11 after flipping for subsequent attachment of the foam washer B.

[0039] like Figure 1-Figure 4As shown, the direct vibration mechanism 4 includes a linear vibrator 41, a screw conveying frame 42 and a screw screening plate 43 arranged above the linear vibrator 41, a screw screening channel 44 for linearly conveying screws A is provided between the screw conveying frame 42 and the screw screening plate 43, one end of the screw screening channel 44 is connected to the vibration plate 3, and the other end is connected to the screw entry hole 511, the screw arrangement mechanism 5 includes an arrangement partition 51, a screw entry hole 511 opened on the arrangement partition 51, a staggered arrangement plate 52 arranged at one end of the arrangement partition 51 away from the direct vibration mechanism 4, and a linear drive module 53 for driving the staggered arrangement plate 52 to slide back and forth horizontally along the arrangement partition 51, and a plurality of screw arrangement grooves 521 arranged in a transverse arrangement are provided on the staggered arrangement plate 52, and the screw arrangement grooves 521 are oriented toward the arrangement partition 51. One end of each of the plurality of screw terminals is provided with a notch 522 which is electrically connected to the screw entry hole 511. The output end of the linear drive module 53 is connected to the offset arrangement plate 52. An entry blocking cylinder 54 is provided at the arrangement partition plate 51 corresponding to the screw entry hole 511. An entry blocking plate 541 is provided at the output end of the entry blocking cylinder 54. The entry blocking cylinder 54 drives the entry blocking plate 541 to approach or move away from the screw entry hole 511, thereby blocking and releasing the screw A at the screw entry hole 511. The screw A in the screw conveying assembly has a washer fitting portion A2 in the middle thereof which is respectively a flat circular plane A21 and a conical inclined portion A22. In order to enable the screw screening channel 44 to stably screen and transport the screw A, it is necessary to set the screw circular plane A21 against the surface of the screw conveying frame 42, such as Figure 4As shown, when processing this type of screw A, the screw conveying frame 42 will have a conveying groove for the threaded portion A1 of the screw A to pass through, and the surface of the conveying groove 421 has a conveying surface 422 that abuts against the surface of the circular plane A21 of the screw, and the upper screw screening plate 43 has a height that limits the upper threaded portion A1 of the screw A and constitutes a screw screening channel 44, so that the screw A can be smoothly conveyed in a straight line in the screw screening channel 44, avoiding the shaking problem caused by the inclined portion A22 for transportation. In this way, the screws A in the vibration plate 3 enter the screw screening channel 44 with their circular plane A21 facing downward, and then enter the screw entry holes 511 one by one. As the screw arrangement grooves 521 on the offset arrangement plate 52 correspond one by one, they enter the corresponding screw arrangement grooves 521 neatly for arrangement and for the screw turning mechanism 6 to clamp. At the same time, in order to avoid the screw A entering the screw arrangement grooves 521 from the screw entry hole 511 The upward tilting, the arranging partition plate 51 is corresponding to the screw entry hole 511 and is away from the straight vibration mechanism 4. An anti-tilt baffle 55 is provided on the side. The anti-tilt baffle 55 is arranged just above the offset arranging plate 52, so that the screw A can stably enter the screw arranging groove 521, and there is an offset activity gap between the anti-tilt baffle 55 and the screw entry hole 511 to avoid interference with the lateral movement of the offset arranging plate 52. The inner surface of the screw arranging groove 521 is preferably provided with an arranging step 523 which is limited by the circular plane A21, so as to stably arrange the screws A one by one in the horizontal direction and transport them to the clamping position of the screw turning mechanism 6. At the same time, during the period of time when the screw arranging groove 521 is filled and waiting to be clamped, the entry baffle cylinder 54 will drive the entry baffle plate 541 to move down and block the screw entry hole 511, so as to avoid the problem of jamming caused by continuous conveying of screws A by the straight vibration mechanism 4, thereby improving the stability of the screws A during the conveying process and ensuring that the screws A can be neatly arranged and transferred in multiple pieces at the same time.

[0040] like Figure 5 , Figure 6As shown, since the subsequent screw A needs to install the foam gasket B on the screw positioning seat 11, the screw A arranged at the screw conveying assembly needs to be flipped before it can be inserted into the screw positioning seat 11, so that the circular plane A21 can be set upward to facilitate the installation of the foam gasket B. Therefore, a screw flipping mechanism 6 is provided, and the screw flipping mechanism 6 includes a screw flipping frame 61 arranged on one side of the offset arrangement plate 52, a flipping and lifting cylinder 62 arranged on the screw flipping frame 61, a screw rotating cylinder 63 arranged at the output end of the flipping and lifting cylinder 62, and a flipping finger cylinder 64 arranged at the output end of the screw rotating cylinder 63. The flipping finger cylinder 64 is arranged directly above the offset arrangement plate 52. At the same time, in order to improve the lifting stroke and lifting accuracy of the flipping finger cylinder 64 and facilitate the flipping of screws A of different lengths, the flipping and lifting cylinder 62 controls the axial height of the flipping finger cylinder 64 to avoid interference with the work of the screw conveying assembly and the screw feeding assembly 2. At the same time, it can stably clamp the screws A on the screw conveying assembly in batches and then rotate them 180° through the screw rotating cylinder 63 to stay in the clamping position of the screw feeding assembly 2, wherein the screw rotating cylinder 63 includes a rotating cylinder body 631, a rotating output shaft 632 installed at the output end of the rotating cylinder body 631, and a rotating protrusion 633 sleeved on the outside of the rotating output shaft 632 and rotating with the rotating output shaft 632. The flipping finger cylinder 64 is installed on the rotating output shaft 632, and a hydraulic buffer 634 is provided at each end of the rotating cylinder body 631. The hydraulic buffers 634 are respectively arranged at the two ends of the rotation path of the rotating protrusion 633, so that during the 180° reciprocating rotation of the screw rotating cylinder 63, the rotating protrusion 633 can respectively offset the two hydraulic buffers 634 one by one, thereby quickly realizing the flipping and buffering at the same time, avoiding the offset of the clamping position of the flipping finger cylinder 64, and improving the accuracy of the workpiece. Figure 6 As shown, in order to provide transmission accuracy and efficiency for the screw rotating cylinder 63, a rotating bearing seat 635 is further provided at the rotating cylinder body 631, and a plurality of flip bearings 636 are provided in the rotating bearing seat 635. The inner ring of the flip bearing 636 is connected to the rotating output shaft 632, and the outer ring is connected to the inner wall of the rotating bearing seat 635. The hydraulic buffer 634 is arranged on the rotating bearing seat 635, which makes installation more convenient.

[0041] like Figure 7As shown, the screw feeding assembly 2 includes a screw feeding rack 21 arranged on one side of the turntable 1, a feeding transverse movement cylinder 22 arranged on the screw feeding rack 21, a feeding lifting plate 23 arranged at the output end of the feeding transverse movement cylinder 22, a feeding lifting cylinder 24 arranged on the feeding lifting plate 23, and a feeding finger cylinder 25 arranged at the output end of the feeding lifting cylinder 24. In order to improve the lifting stroke and lifting accuracy of the feeding finger cylinder 25 and facilitate the feeding of screws A of different lengths, a feeding fine-tuning lifting cylinder 26 is also provided at the output end of the feeding lifting cylinder 24, and the feeding finger cylinder 25 is arranged at the output end of the feeding fine-tuning lifting cylinder 26. In this way, the feeding fine-tuning lifting cylinder 26 and the feeding lifting cylinder 24 control the axial height of the feeding finger cylinder 25 to avoid screw While the wire turning mechanism 6 interferes with the operation of the turntable 1, the screws A of the screw turning mechanism 6 can be stably clamped in batches and stably inserted into the positioning holes 111 of the screw positioning seat 11 through the loading transverse movement cylinder 22 and the loading fine-tuning lifting cylinder 26 and the loading lifting cylinder 24 to complete the batch loading of the screws A. At the same time, a loading lifting rail structure 231 is arranged between the loading fine-tuning lifting cylinder 26 and the loading lifting plate 23, so that the loading finger cylinder 25 can be stably lifted and lowered along the axial direction of the loading lifting plate 23 to avoid tilting. At the same time, the end of the positioning hole 111 is preferably arranged as a truncated cone-shaped notch that matches the washer fitting portion A2 to avoid shaking of the screw A when moving in the screw positioning seat 11, thereby improving the accuracy and stability of batch loading of the screws A.

[0042] like Figure 5-Figure 9As shown, the output ends of the flip finger cylinder 64 and the feeding finger cylinder 25 are each provided with two screw clamps 7 arranged opposite to each other, and cylindrical screw clamping notches 71 for clamping screws A in batches are formed correspondingly between the screw clamps 7, and the screw clamps 7 have V-shaped clamps 72 arranged opposite to each other, and a screw clamping notch 71 for clamping screws A is formed between the two V-shaped clamps 2. By changing the original common semicircular clamp to a V-shaped clamp, when clamping a larger screw A, the original circular screw clamping notch 71 and the screw A are intersected in a manner that is changed from surface contact to point contact, resulting in unstable clamping. After the V-shaped clamp 72 is used, the abutment between the screw A and the notch 71 will become tangent, and the abutment surface will still have a large area of ​​surface contact, which solves the problem of the original circular screw The thread clamping slot 71 changes from surface contact to point contact when it abuts against the screw A, causing the clamping to be unstable and easy to tip over. As a result, the V-shaped clamping slot 72 can use the same pair of screw clamping plates 7 to clamp screws A of different specifications, so that there is no need to frequently replace the screw clamping plates 7, which greatly improves the adaptability of the screw clamping plates 7. The corresponding screw clamping plates 7 are all provided with clamping plate threaded portions 721 corresponding to the V-shaped clamping slots 72. The clamping plate threaded portion 721 is provided with a plunger screw 722 threadedly connected to the clamping plate threaded portion 721. The setting of the plunger screw 722 can conveniently adjust the inner cavity distance of the screw clamping slot 71. When clamping some small screws A, the position of the plunger screw 722 can be rotated, thereby achieving stable clamping of the screw A, which greatly improves the application range of the screw clamping plates 7.

[0043] like Fig.11 As shown, when the automatic screw feeding mechanism of the utility model is used in the automatic assembly equipment of automobile screw foam washers, the workbench is set as a turntable 1 that can rotate intermittently, and the frame is sequentially provided with screw feeding station I, screw pressing station II, screw sleeve washer station III and screw unloading station IV along the rotation direction of the turntable 1. The screw conveying component realizes directional arrangement of screws through the vibration plate 3, the direct vibration mechanism 4 and the screw arrangement mechanism 5, and realizes batch loading through the screw flipping mechanism 6 and the screw feeding component 2. The screw pressing station II is used to transfer the screws after loading. Multiple screws A are pressed tightly, and the robot arm of the screw washer station III is equipped with a foam transfer fixture to accurately grab the foam washer B and put it on the surface of the screw A. The foam washer conveying component realizes continuous feeding through the peeling of the bottom paper and the feeding of the anti-sticking plate. The foam waste discharge component simultaneously removes the waste, and the screw unloading component batches out the finished screws A, realizing the fully automatic assembly of screw A and foam washer B, which significantly improves the efficiency and yield, effectively prevents the problems of foam tearing and viscosity failure caused by manual operation, and meets the large-scale production needs of automotive waterproof and shock-absorbing screws.

Claims

1. An automatic screw feeding mechanism for an automated assembly device for automotive screw foam washers, comprising a workbench, a plurality of screw positioning seats being arranged on the workbench, a plurality of positioning holes for receiving screws being arranged on the screw positioning seats, and characterized in that: A screw conveying assembly for conveying screws and a screw loading assembly for conveying the screws on the screw conveying assembly to the screw positioning seat are provided on one side of the workbench. The screw conveying assembly includes a vibration plate, a direct vibration mechanism and a screw arranging mechanism. The screw arranging mechanism includes an arranging partition, an offset arranging plate arranged at one end of the arranging partition away from the direct vibration mechanism, and an arranging driving mechanism for driving the offset arranging plate to slide back and forth horizontally along the arranging partition. A plurality of screw arranging grooves arranged transversely are provided on the offset arranging plate. The ends of the screw arranging grooves facing the arranging partition have notches that can be connected to the direct vibration mechanism. One end of the direct vibration mechanism is connected to the vibration plate, and the screws screened in the vibration plate are fed one by one into the offset screw arranging groove plate through the notches.

2. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 1 is characterized by: The arrangement partition is provided with a screw entry hole connected to the direct vibration mechanism, and an entry blocking cylinder is arranged at the position of the arrangement partition corresponding to the screw entry hole. An entry blocking plate is arranged at the output end of the entry blocking cylinder, and the entry blocking cylinder drives the entry blocking plate to approach or move away from the screw entry hole, thereby blocking and releasing the screw at the screw entry hole.

3. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 2 is characterized by: The arrangement driving mechanism is a linear driving module, and the output end of the linear driving module is connected to the offset arrangement plate, thereby driving the offset arrangement plate to slide back and forth laterally.

4. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 2 is characterized by: The arrangement partition plate is also provided with an anti-tilt baffle on the side of the screw entry hole away from the direct vibration mechanism. The anti-tilt baffle is arranged above the misaligned arrangement plate and there is a misaligned movable gap between the anti-tilt baffle and the screw entry hole.

5. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to any one of claims 1 to 4, characterized in that: The screw feeding assembly includes a screw feeding rack arranged on one side of the turntable, a feeding transverse movement cylinder arranged on the screw feeding rack, a feeding lifting plate arranged at the output end of the feeding transverse movement cylinder, a feeding lifting cylinder arranged on the feeding lifting plate and a feeding finger cylinder arranged at the output end of the feeding lifting cylinder. The output end of the feeding finger cylinder is provided with two relatively arranged screw clamps, and a plurality of screw clamping grooves are correspondingly formed between the screw clamps. The feeding finger cylinder is driven by the feeding transverse movement cylinder and the feeding lifting cylinder to synchronously transfer a plurality of screws on the offset arrangement plate to the screw positioning seat.

6. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 5 is characterized by: The direct vibration mechanism includes a linear vibrator, a screw conveying rack and a screw screening plate arranged above the linear vibrator, a screw screening channel for linearly conveying screws is provided between the screw conveying rack and the screw screening plate, one end of the screw screening channel is connected to the vibration disk, and the other end is connected to the screw entry hole.

7. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 6 is characterized by: A screw turning mechanism is provided between the screw feeding assembly and the offset arrangement plate, which clamps and turns over multiple screws on the offset arrangement plate and then provides them for the screw feeding assembly to clamp and feed. The screw turning mechanism includes a screw turning frame arranged on one side of the offset arrangement plate, a turning and lifting cylinder arranged on the screw turning frame, a screw rotating cylinder arranged at the output end of the turning and lifting cylinder, and a turning finger cylinder arranged at the output end of the screw rotating cylinder. The turning finger cylinder is arranged above the offset arrangement plate, and the output end of the turning finger cylinder is provided with two relatively arranged screw clamps.

8. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 7 is characterized by: The screw clamps are each provided with V-shaped clamps arranged opposite to each other, and a screw clamping notch for clamping a screw is formed between the two V-shaped clamps.

9. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 8, characterized in that: The screw clamp is provided with a clamp threaded portion at the position corresponding to the V-shaped clamping opening, and a plunger screw threadedly connected with the clamp threaded portion is arranged in the clamp threaded portion.

10. The automatic screw feeding mechanism of the automatic assembly equipment for automobile screw foam washers according to claim 7, characterized in that: The screw rotating cylinder includes a rotating cylinder body, a rotating output shaft installed at the output end of the rotating cylinder body, and a rotating protrusion sleeved on the outside of the rotating output shaft and rotating with the rotating output shaft. The flip finger cylinder is installed on the rotating output shaft. A hydraulic buffer is provided at each end of the rotating cylinder body, and the hydraulic buffers are respectively arranged at both ends of the rotation path of the rotating protrusion.

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