Rotating disc type tightening equipment for screw assembly

Abstract

The invention relates to the technical field of screw assembly, and discloses a rotary table mechanism of rotary table type tightening equipment for screw assembly, which comprises a feeding mechanism, the feeding mechanism comprises a fixed frame fixedly connected to the rotary table mechanism, and the fixed frame is slidably connected with a movable frame; the upper end of the fixed frame is fixedly connected with a lifting air cylinder, a piston rod of the lifting air cylinder is fixedly connected with the movable frame, the lower end of the movable frame is connected with a conveying assembly and a tightening mechanism, the tightening mechanism comprises a screwdriver head, and the upper end of the screwdriver head is connected with a downward pushing assembly. The rotating disc type tightening equipment for screw assembly can effectively solve the problems that in the prior art, when screws are conveyed into a bit in an air blowing mode, the rotating disc type tightening equipment is only suitable for the screws with the length-diameter ratio ranging from 1.3 to 2.0, the screws are prone to being turned over when the length-diameter ratio is smaller than the section, and the screws are prone to being clamped when the length-diameter ratio is larger than the section, and the two conditions can both cause equipment shutdown and lead to low installation efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of screw assembly, and in particular to a turntable type tightening device for screw assembly. Background Art

[0002] Rotary table tightening equipment is a kind of equipment commonly used in automated production lines. It is mainly used for fast and accurate tightening and assembly of screws. It is often used in automobile manufacturing, electronic equipment manufacturing, home appliance manufacturing, machinery manufacturing and other fields.

[0003] The turntable tightening equipment mainly consists of a turntable mechanism, a tightening mechanism, a feeding mechanism, a positioning mechanism and a control system. When working, the feeding mechanism accurately places the screws in the screw hole position of the workpiece, and the tightening mechanism tightens the screws according to the preset torque value and rotation angle. When the screw assembly of one station is completed, the turntable continues to rotate and sends the next workpiece to be assembled to the corresponding station. The above operations are repeated to achieve continuous screw assembly operations.

[0004] There are many ways for the feeding mechanism to transport screws. One of the more common ways is air blowing, that is, the screws are blown along the pipe to the bit through compressed air, and the bit magnetically absorbs the screw head. The advantage of this conveying method is that the feeding speed is fast and the cost is relatively low. Its disadvantage is that it can only transport screws with an aspect ratio (the ratio of the screw length to the screw outer diameter) in a certain range (1.3 to 2.0). When the aspect ratio of the screw is less than this range, the screw is prone to flipping when passing through the fork in the road, and the discharge direction cannot be guaranteed to be consistent. When the aspect ratio of the screw is greater than this range, the screw is prone to nail jamming when passing through the fork in the road. Both situations will cause equipment shutdown and reduce installation efficiency. Summary of the Invention

[0005] In response to the above-mentioned shortcomings of the prior art, the present invention provides a turntable tightening device for screw assembly, which can effectively solve the problem in the prior art that when delivering screws to the bit by air blowing, it is only suitable for screws with a length-to-diameter ratio in the range of 1.3 to 2.0. If the length-to-diameter ratio is smaller than this range, the nails are prone to flipping, and if it is larger than this range, the nails are prone to jamming. Both situations will cause the equipment to stop, resulting in reduced installation efficiency.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The present invention provides a turntable type tightening device for screw assembly, comprising:

[0008] Turntable mechanism.

[0009] The feeding mechanism includes a fixed frame fixedly connected to the turntable mechanism, a movable frame is slidably connected to the fixed frame, the upper end of the fixed frame is fixedly connected to a lifting cylinder and the piston rod of the lifting cylinder is fixedly connected to the movable frame, and the lower end of the movable frame is connected to a conveying assembly.

[0010] The tightening mechanism includes a screwdriver bit, the upper end of the screwdriver bit is connected to a push-down assembly, the upper end of the movable frame is fixedly connected to a push cylinder, and the piston rod of the push cylinder is connected to the upper end of the push-down assembly.

[0011] Among them, the conveying component includes a connecting pipe, which is fixedly connected to the movable frame. The upper end of the connecting pipe is fixedly connected to the nail blowing pipe in the air blowing feeder, and the lower end of the connecting pipe is fixedly connected to the outer shell. The outer shell is equipped with a material moving component that can be used to convey the screws to the lower end of the bit.

[0012] Furthermore, the material moving assembly includes an annular frame, which is rotatably connected to the outer shell and fixedly connected to a center seat through two connecting plates. The upper end of the center seat is rotatably connected to the outer shell through a short rod, and two receiving modules are symmetrically connected to the center seat and the annular frame.

[0013] Furthermore, the receiving module includes a receiving plate, and two ear plates are symmetrically fixedly connected to the inner wall of the annular frame. The two ear plates are rotatably connected to the mounting rod through a torsion spring. Two receiving plates are symmetrically slidably connected to the mounting rod, and two receiving plates are symmetrically installed in the same manner at corresponding positions on the center seat.

[0014] Furthermore, the ends of the annular frame and the central seat close to the corresponding receiving plates are both provided with arc chamfers.

[0015] Furthermore, an intermediate plate is fixedly sleeved in the middle position of the mounting rod, and a sliding member is rotatably connected to the receiving plate near the intermediate plate. The sliding member is slidably connected to the mounting rod and fixedly connected to the intermediate plate through a thrust spring. The lower ends of the corresponding two sliding members are hinged to a traction block through a hinge plate, and a guide frame is fixedly connected to the bottom plate of the outer shell, and a protrusion is provided on the guide frame directly below the connecting pipe.

[0016] Furthermore, the push-down assembly includes a threaded rod, the upper end of which is rotatably connected to the piston rod of the push cylinder, a horizontal plate is fixedly connected to the movable frame, a ring is fixedly connected to the horizontal plate, and a limiting block is fixedly connected to the circumferential inner surface of the ring, and the limiting block slides in conjunction with the threaded groove on the outer surface of the threaded rod.

[0017] Furthermore, the threaded rod adopts a hollow design and is slidably connected to a connecting rod. The upper end of the connecting rod is fixedly connected to the threaded rod through a compression spring, and the lower end of the connecting rod is connected to the bit through a thread.

[0018] Furthermore, the upper end of the short rod is fixedly connected to a cylindrical cam, which adopts a hollow design and has a corrugated groove on the inner wall. A guide column is connected to the cylindrical cam for sliding up and down. The circumferential outer surface of the guide column is fixedly connected to a spring-type universal ball bearing. The upper end of the guide column is fixedly connected to a spring rod, which passes through the horizontal plate and is rotatably connected to the threaded rod through a connecting piece.

[0019] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0020] 1. In the present invention, the screws are blown along the nail blowing tube to the connecting tube through an air blowing feeder. The connecting tube is vertically arranged, and the screws enter the shell vertically along the connecting tube and fall on the receiving plate of the material transfer component. Compared with the conventional inclined feeding method in which the inclined nail feeding channel limits the length-to-diameter ratio of the screws, this vertical blanking method uses the connecting tube as a vertical buffer part to enable the screws to maintain a vertical state when blanking, without being restricted by the length-to-diameter ratio in the range of 1.3 to 2.0, effectively expanding the applicability of the equipment to screws of different specifications.

[0021] 2. Conventional tightening equipment conveys screws through an oblique nail feeding channel. When the screws pass through the fork, they are prone to flipping or jamming due to improper aspect ratio. However, in the present invention, the connecting pipe is arranged vertically. After the screws fall vertically into the shell, they are directly mounted on the receiving plate without passing through the oblique nail feeding channel. This fundamentally avoids the flipping and jamming of nails caused by the angle problem of the oblique channel, ensures stable operation of the equipment, and reduces downtime. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0023] Figure 1 Schematic diagram of the structure of an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the feeding mechanism and the tightening mechanism in an embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of the feeding mechanism in an embodiment of the present invention;

[0026] Figure 4 This is an exploded view of the housing and the material transfer assembly in an embodiment of the present invention;

[0027] Figure 5 This is a structural diagram of a material moving assembly in an embodiment of the present invention;

[0028] Figure 6 This is a structural diagram of a receiving module in an embodiment of the present invention;

[0029] Figure 7 An exploded view of the annular frame, cylindrical cam, guide post and spring-loaded universal ball in an embodiment of the present invention;

[0030] Figure 8 It is an exploded view of the tightening mechanism of the present invention.

[0031] 3. Tightening mechanism; 31. Batch bit; 32. Push-down assembly; 321. Threaded rod; 322. Connecting rod; 323. Compression spring; 324. Limit block; 325. Horizontal plate. DETAILED DESCRIPTION

[0032] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] The present invention will be further described below with reference to the embodiments.

[0034] Example:

[0035] See also Figure 1-Figure 2 , the present invention provides a technical solution:

[0036] A rotary disc type tightening device for screw assembly, comprising:

[0037] The turntable mechanism 1 is installed on the workbench and driven by a motor to achieve uniform rotation. There are multiple workstations on the turntable, each of which corresponds to a workpiece to be assembled, which can make the workpiece pass through various assembly links in sequence. This is the existing technology.

[0038] The feeding mechanism 2 includes a fixed frame 21 fixedly connected to the turntable mechanism 1, a movable frame 22 is slidably connected to the fixed frame 21, the upper end of the fixed frame 21 is fixedly connected to a lifting cylinder and the piston rod of the lifting cylinder is fixedly connected to the movable frame 22, and the lower end of the movable frame 22 is connected to a conveying assembly 23.

[0039] The tightening mechanism 3 includes a screwdriver bit 31 , the upper end of the screwdriver bit 31 is connected to a push-down assembly 32 , the upper end of the movable frame 22 is fixedly connected to a push cylinder, and the piston rod of the push cylinder is connected to the upper end of the push-down assembly 32 .

[0040] Among them, the conveying component 23 includes a connecting pipe 231, which is fixedly connected to the movable frame 22. The upper end of the connecting pipe 231 is fixedly connected to the nail blowing pipe in the air blowing feeder, and the lower end of the connecting pipe 231 is fixedly connected to the shell 232. The shell 232 is equipped with a material moving component 24 that can be used to transport the screws to the lower end of the screwdriver head 31. The upper end surface of the shell 232 is provided with a through groove that coincides with the central axis of the screwdriver head 31. The lower end surface of the shell 232 is fixedly connected with a clamping nozzle, and the side walls of the clamping nozzle are symmetrically provided with a clearance groove to avoid collision with the screw.

[0041] During the specific work, the staff places the workpiece to be assembled with screws on the work station of the turntable mechanism 1. As the turntable mechanism 1 rotates, the workpiece is accurately moved to the bottom of the tightening mechanism 3. At the same time, the air blowing feeder blows the screw along the nail blowing tube into the connecting pipe 231, and then vertically enters the outer shell 232 along the connecting pipe 231 and falls on the material moving assembly 24. When the workpiece moves to the bottom of the tightening mechanism 3 with the turntable, the lifting cylinder piston rod is extended, driving the movable frame 22 to move downward, so that the lower end of the clamping nozzle is close to the mounting hole on the workpiece, and then, the cylinder piston rod is pushed out. On the one hand, the material moving assembly 24 is rotated one hundred and eighty degrees, so that the screw on it moves to the bottom of the batch head 31, and on the other hand, it drives the batch head 31 to rotate and move downward, first contacting the upper end of the screw moved below it, and then pushing the screw to move downward synchronously, through the clamping nozzle to be installed in the mounting hole on the workpiece.

[0042] It is worth noting that the above-mentioned air-blowing feeder and the nail-blowing tube therein are existing equipment and are not shown in the figure.

[0043] See Figure 2 and Figure 3The material moving assembly 24 includes an annular frame 241, which is rotatably connected to the outer shell 232 and fixedly connected to a center seat 242 through two connecting plates. The upper end of the center seat 242 is rotatably connected to the outer shell 232 through a short rod. Two receiving modules 243 are symmetrically connected to the center seat 242 and the annular frame 241, one of which is arranged below the connecting pipe 231, and the other is arranged below the batch head 31.

[0044] See Figure 3-Figure 6 The receiving module 243 includes a receiving plate 2431. The inner wall of the annular frame 241 is symmetrically fixedly connected to two ear plates. The two ear plates are rotatably connected to the mounting rod through a torsion spring 2432. Two receiving plates 2431 are symmetrically slidably connected to the mounting rod. Under the action of the torsion spring 2432, the receiving plate 2431 is always horizontal in a natural state without bearing weight. Two receiving plates 2431 are symmetrically installed in the same manner at corresponding positions on the center seat 242. The ends of the corresponding receiving plates 2431 on the annular frame 241 and the center seat 242 are close to each other and are provided with arc chamfers 2433.

[0045] During specific operation, after the screw enters the outer shell 232 along the connecting tube 231, it will fall vertically onto the receiving plate 2431 below it, be mounted between the four receiving plates 2431, and slide to the lowest point under the guidance of the arc chamfer 2433 at the end of the receiving plate 2431. In this state, the screw will automatically adjust to a vertical state under the action of its own gravity. Since the gravity of the screw itself is less than the torque of the torsion spring 2432, after the screw falls onto the receiving plate 2431, the receiving plate 2431 is still in a horizontal state.

[0046] It is worth mentioning that the conventional tightening equipment conveys screws by blowing the screws along the nail blowing tube into the nozzle through compressed air. The nozzle is connected to the nail blowing tube through the oblique nail feeding channel on it. The nozzle must pass through the oblique nail feeding channel before entering the nozzle. The phenomena of nail flipping and nail jamming often occur in the oblique nail feeding channel. Generally speaking, the smaller the acute angle between the oblique nail feeding channel and the nozzle, the smaller the probability of nail flipping and nail jamming. However, considering the interference of mechanical parts, the angle cannot be completely eliminated. For this reason, screws with a length-to-diameter ratio in the range of 1.3 to 2.0 pass through the oblique nail feeding channel more smoothly, and the probability of nail flipping and nail jamming is lower.

[0047] The method of conveying screws in this embodiment is different from the conventional conveying method in that since the connecting tube 231 is arranged vertically, the screws can maintain the state in the nail blowing tube and fall vertically onto the receiving plate 2431. Compared with the conventional inclined feeding method, on the one hand, it can completely avoid the occurrence of nail flipping and nail jamming. On the other hand, this vertical dropping method no longer has any requirements for the aspect ratio of the screws due to the addition of the vertical buffer part of the connecting tube 231. Compared with the conventional feeding method, it is more versatile.

[0048] An intermediate plate 2434 is fixedly sleeved in the middle position of the mounting rod, and a sliding member 2435 is rotatably connected to the receiving plate 2431 near the intermediate plate 2434. The sliding member 2435 is slidably connected to the mounting rod and fixedly connected to the intermediate plate 2434 through a thrust spring 2436. The lower ends of the corresponding two sliding members 2435 are hingedly connected to a traction block 2437 through a hinge plate. A guide frame 2438 is fixedly connected to the bottom plate of the outer shell 232. The guide frame 2438 is provided with a protrusion directly below the connecting pipe 231. The bottom of the traction block 2437 adopts a rounded corner design, and the protrusion of the guide frame 2438 adopts a gradual chamfer design that is adapted to the rounded corner below the traction block 2437.

[0049] During specific operation, when the traction block 2437 is located below the connecting tube 231, it is in a relatively high position due to the restriction of the protrusion of the guide frame 2438. In this state, the angle between the two hinged plates is large, so that the two sliding parts 2435 are in a state of being away from each other, and the distance between the two receiving plates 2431 is also relatively large, thereby reserving sufficient space for the screw to fall, preventing the screw from contacting it and causing interference when falling.

[0050] See Figure 2 and Figure 8 The push-down assembly 32 includes a threaded rod 321, the upper end of the threaded rod 321 is rotatably connected to the piston rod of the pushing cylinder, a horizontal plate 325 is fixedly connected to the movable frame 22, and the connecting pipe 231 is installed on the horizontal plate 325, and a ring-shaped part is fixedly connected to the horizontal plate 325. The inner circumferential surface of the ring-shaped part is fixedly connected to a limiting block 324, and the limiting block 324 slides in conjunction with the threaded groove on the outer surface of the threaded rod 321.

[0051] The threaded rod 321 adopts a hollow design and is slidably connected to a connecting rod 322. The upper end of the connecting rod 322 is fixedly connected to the threaded rod 321 via a compression spring 323, and the lower end of the connecting rod 322 is connected to the screwdriver bit 31 via a thread. The compression spring 323 is always in an elastically compressed state, so that when the connecting rod 322 is not subjected to other external forces, its upper end is located at the bottom end of the hollow structure inside the threaded rod 321.

[0052] See Figure 3 、 Figure 7 and Figure 8 The upper end of the short rod is fixedly connected to a cylindrical cam 244. The cylindrical cam 244 adopts a hollow design and a corrugated groove is opened on the inner wall. A guide column 245 is connected to the cylindrical cam 244 for sliding up and down. The outer circumferential surface of the guide column 245 is fixedly connected to a spring-type universal ball 246. The depth of the inclined section of the corrugated groove gradually becomes deeper from top to bottom, and the depth of the vertical section of the corrugated groove gradually becomes shallower from top to bottom, so that the spring-type universal ball 246 can smoothly slide and transition from the vertical section to the inclined section when at the crest of the corrugated groove, and can smoothly transition from the inclined section to the vertical section when at the trough of the corrugated groove. The upper end of the guide column 245 is fixedly connected to a spring rod, which passes through the horizontal plate 325 and is rotatably connected to the threaded rod 321 through a connecting piece.

[0053] During specific operation, when the screw falls on the receiving plate 2431 and is in a vertical state under the guidance of the arc chamfer 2433 and its own gravity, the piston rod of the cylinder is extended, pushing the threaded rod 321 to move downward relative to the annular member. During this process, the limit block 324 slides in the threaded groove on the outer surface of the threaded rod 321, causing the threaded rod 321 to rotate. The rotation of the threaded rod 321 will drive the connecting rod 322 and the screwdriver bit 31 to rotate synchronously, and at the same time, the connecting rod 322 and the screwdriver bit 31 are driven to move downward synchronously through the compression spring 323.

[0054] When the threaded rod 321 moves downward, it will also drive the spring rod to move downward synchronously through the connecting piece, driving the guide column 245 to move downward relative to the cylindrical cam 244. During this process, the spring-loaded universal ball 246 slides along the corrugated groove. When the guide column 245 slides to the bottom in the cylindrical cam 244, the cylindrical cam 244 rotates exactly one hundred and eighty degrees, driving the center seat 242, the connecting plate and the annular frame 241 to rotate one hundred and eighty degrees synchronously. The rotation of the annular frame 241 will drive the receiving module 243 and the screw to rotate one hundred and eighty degrees synchronously, thereby moving the screw to directly below the bit 31.

[0055] As the receiving module 243 rotates with the annular frame 241, the traction block 2437 therein also rotates relative to the guide frame 2438 and slides out from the protrusion of the guide frame 2438. Since the traction block 2437 loses its restriction below, it will fall freely and reduce the angle between the two hinged plates through its own gravity, thereby driving the two sliding parts 2435 to approach each other, and then the two receiving plates 2431 also approach each other. The clamping screws prevent them from shaking due to the centrifugal force during rotation.

[0056] After the screw moves to the bottom of the bit 31, as the threaded rod 321 continues to rotate and descend, the bit 31 is driven to descend synchronously through the compression spring 323 and the connecting rod 322 and contact the upper end of the screw, pressing the screw downward to make it enter the clamping mouth. During this process, the receiving plate 2431 will rotate downward and disengage from the screw when it rotates to a certain angle. As the bit 31 continues to rotate and move downward, it automatically aligns with the pattern above the screw and drives the screw to rotate synchronously until the screw rotates into the mounting hole. The spring rod then adaptively contracts, always pressing the guide post 245 to the lowest point in the cylindrical cam 244.

[0057] It is worth mentioning that the above-mentioned rotary disc tightening equipment for screw assembly has the following advantages:

[0058] Advantage 1. In this embodiment, the screws are blown along the nail blowing tube to the connecting tube 231 by an air blowing feeder. The connecting tube 231 is vertically arranged. The screws enter the shell 232 vertically along the connecting tube 231 and fall on the receiving plate 2431 of the material moving assembly 24. Compared with the conventional inclined feeding method in which the inclined nail feeding channel limits the aspect ratio of the screws, this vertical blanking method uses the vertical buffer part of the connecting tube 231 to keep the screws in a vertical state when blanking, without being restricted by the aspect ratio in the range of 1.3 to 2.0, effectively expanding the applicability of the equipment to screws of different specifications.

[0059] Advantage 2: Conventional tightening equipment conveys screws through an oblique nail feeding channel. When the screws pass through the fork, they are prone to flipping or jamming due to improper aspect ratio. In this embodiment, the connecting tube 231 is arranged vertically. After the screws fall vertically into the shell 232, they are directly mounted on the receiving plate 2431 without passing through the oblique nail feeding channel. This fundamentally avoids the flipping and jamming of nails caused by the angle problem of the oblique channel, ensures stable operation of the equipment, and reduces downtime.

[0060] Advantage 3. In this embodiment, when the screw falls on the receiving plate 2431 below the connecting tube 231, the annular frame 241 rotates to drive the receiving module 243 to rotate, and the traction block 2437 rotates with the annular frame 241 and slides out from the protrusion of the guide frame 2438. Since the traction block 2437 loses its restriction below, it falls under the action of its own gravity, and drives the two sliding parts 2435 to approach each other through the hinged plate, thereby making the two receiving plates 2431 approach each other, applying a clamping force to the screw. When the screw falls into the receiving plate 2431, the verticality has been preliminarily corrected by the arc chamfer 2433. During the rotation, it is further stabilized by the clamping force, thereby further correcting its position and verticality, and preventing the screw from shaking due to centrifugal force during movement.

[0061] Advantage 4. In this embodiment, after the screw falls into the outer shell 232 along the connecting tube 231, it falls vertically onto the receiving plate 2431. The ends of the annular frame 241 and the center seat 242 corresponding to the receiving plate 2431 are provided with arc chamfers 2433. Under the action of the screw's own gravity, it will slide to the lowest point under the guidance of the arc chamfer 2433. During this process, the screw automatically adjusts to a vertical state and is in the middle position of the receiving plate 2431, achieving centering and verticality, laying a good foundation for subsequent assembly.

[0062] Advantage 5. In this embodiment, the piston rod of the push cylinder is extended, pushing the threaded rod 321 to move downward relative to the annular member. Since the inner surface limit block 324 of the annular member of the horizontal plate 325 on the movable frame 22 slides with the threaded groove on the outer surface of the threaded rod 321, the threaded rod 321 rotates during the downward movement, and the rotation of the threaded rod 321 drives the connecting rod 322 and the screwdriver bit 31 in the hollow design to rotate synchronously. The upper end of the connecting rod 322 is connected to the threaded rod 321 by a compression spring 323, and can slide up and down adaptively. This process does not require debugging the feed distance and speed like a conventional motor drive, realizing adaptive installation and simplifying operation. The screwdriver bit 31 and the connecting rod 322 are connected by a threaded connection, which is convenient and quick to replace according to different screw specifications.

[0063] Advantage 6: In this embodiment, as the annular frame 241 drives the receiving module 243 to rotate and move the screw directly below the bit 31, as the traction block 2437 falls, the receiving plate 2431 clamps the screw. Once the screw is below the bit 31, the bit 31 moves downward, driven by the threaded rod 321, contacting the upper end of the screw and pushing it into the clamping nozzle. Due to the clamping action of the receiving plate 2431, the screw remains vertical before entering the clamping nozzle, allowing the bit 31 to accurately align with the pattern above the screw, thereby improving the alignment accuracy between the screw and the mounting hole on the workpiece.

[0064] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A rotary disc type tightening device for screw assembly, characterized in that: include: Turntable mechanism (1); A feeding mechanism (2), the feeding mechanism (2) comprising a fixed frame (21) fixedly connected to the turntable mechanism (1), a movable frame (22) slidably connected to the fixed frame (21), a lifting cylinder fixedly connected to the upper end of the fixed frame (21), and a piston rod of the lifting cylinder fixedly connected to the movable frame (22), and a conveying assembly (23) connected to the lower end of the movable frame (22); A tightening mechanism (3), the tightening mechanism (3) comprising a screwdriver bit (31), the upper end of the screwdriver bit (31) being connected to a push-down assembly (32), the upper end of the movable frame (22) being fixedly connected to a push cylinder, and the piston rod of the push cylinder being connected to the upper end of the push-down assembly (32); The conveying assembly (23) includes a connecting pipe (231), which is fixedly connected to the movable frame (22). The upper end of the connecting pipe (231) is fixedly connected to the nail blowing pipe in the air blowing feeder. The lower end of the connecting pipe (231) is fixedly connected to a shell (232). A material moving assembly (24) for conveying screws to the lower end of the screwdriver bit (31) is installed in the shell (232). A through groove coinciding with the central axis of the screwdriver bit (31) is opened on the upper end surface of the shell (232). The lower end surface of the shell (232) is fixedly connected to a clamping nozzle, and a clearance groove is symmetrically opened on the side wall of the clamping nozzle.

2. A rotary disc type tightening device for screw assembly according to claim 1, characterized in that: The material moving assembly (24) includes an annular frame (241), which is rotatably connected to the housing (232) and fixedly connected to a center seat (242) via two connecting plates. The upper end of the center seat (242) is rotatably connected to the housing (232) via a short rod, and two receiving modules (243) are symmetrically connected to the center seat (242) and the annular frame (241).

3. The rotary disc type tightening device for screw assembly according to claim 2, characterized in that: The receiving module (243) includes a receiving plate (2431), and two ear plates are symmetrically fixedly connected to the inner wall of the annular frame (241). The two ear plates are rotatably connected to a mounting rod through a torsion spring (2432). The two receiving plates (2431) are symmetrically slidably connected to the mounting rod. Two receiving plates (2431) are symmetrically installed in the same manner at corresponding positions on the center seat (242).

4. The rotary disc type tightening device for screw assembly according to claim 3, characterized in that: The ends of the annular frame (241) and the central seat (242) close to the corresponding receiving plates (2431) are both provided with arc chamfers (2433).

5. The rotary disc tightening device for screw assembly according to claim 3, characterized in that: An intermediate plate (2434) is fixedly sleeved in the middle position of the mounting rod, and a sliding member (2435) is rotatably connected to the receiving plate (2431) near the intermediate plate (2434). The sliding member (2435) is slidably connected to the mounting rod and fixedly connected to the intermediate plate (2434) through a thrust spring (2436). The lower ends of the corresponding two sliding members (2435) are hingedly connected to a traction block (2437) through a hinge plate. A guide frame (2438) is fixedly connected to the bottom plate of the outer shell (232), and a protrusion is provided on the guide frame (2438) directly below the connecting pipe (231).

6. The rotary disc type tightening device for screw assembly according to claim 2, characterized in that: The push-down assembly (32) includes a threaded rod (321), the upper end of the threaded rod (321) is rotatably connected to the piston rod of the push cylinder, a transverse plate (325) is fixedly connected to the movable frame (22), an annular member is fixedly connected to the transverse plate (325), a limiting block (324) is fixedly connected to the inner circumferential surface of the annular member, and the limiting block (324) is slidably matched with the thread groove on the outer surface of the threaded rod (321).

7. The rotary disc type tightening device for screw assembly according to claim 6, characterized in that: The threaded rod (321) is hollow in design and is slidably connected to a connecting rod (322). The upper end of the connecting rod (322) is fixedly connected to the threaded rod (321) via a compression spring (323), and the lower end of the connecting rod (322) is connected to the screwdriver bit (31) via a thread.

8. The rotary disc type tightening device for screw assembly according to claim 7, characterized in that: The upper end of the short rod is fixedly connected to a cylindrical cam (244), the cylindrical cam (244) adopts a hollow design and has a corrugated groove on its inner wall. A guide column (245) is connected to the cylindrical cam (244) for sliding up and down. The outer circumferential surface of the guide column (245) is fixedly connected to a spring-type universal ball (246). The upper end of the guide column (245) is fixedly connected to a spring rod, which passes through the horizontal plate (325) and is rotatably connected to the threaded rod (321) through a connecting piece.

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