Positioning turntable mechanism of a damper

Abstract

The utility model discloses a kind of positioning turntable mechanisms of elastic wave, it is related to loudspeaker accessory processing equipment field, the mechanism includes rack, workstation, hot-pressing module, cold setting module, turntable mechanism and quick-release assembly, turntable mechanism is rotated by motor drive fixed seat, cooperation cylinder drive clamp lifting, realize the automatic flow of elastic wave between each station, quick-release assembly utilizes rotary ring drive screw axial movement, push conical block extrusion ball is locked into the radial expansion of workstation clamping groove, realize the quick toolless locking of fixed ring.The utility model realizes the continuous automatic operation of feeding, hot-pressing, cooling, discharging by multi-station turntable design, significantly improve production efficiency, at the same time, the unique quick-release structure solves the problem that traditional screw fixing mode disassembles and assembles is troublesome, shortens mould replacement time, improves the ease of use of equipment and flexible production capacity.

Description

Technical Field

[0001] This utility model relates to the technical field of loudspeaker accessory processing equipment, and in particular to a positioning turntable mechanism for a spring. Background Technology

[0002] As a key centering support in the loudspeaker's vibration system, the quality of the spider's molding directly affects the loudspeaker's sound performance. Hot pressing and cold setting are essential and critical processes in the spider's manufacturing process.

[0003] Traditional spring forming equipment typically operates on a single-machine, single-station basis. Operators manually place the springs into a hot press for heating and shaping, then remove them and place them into a cold press for cooling and setting. This segmented operation is not only labor-intensive but also results in significant interruptions between processes, leading to low production efficiency. More importantly, manually transferring the softened springs between different machines can easily cause product deformation, affecting shaping accuracy. Although some automated equipment with turntable structures has emerged, its tooling fixtures are usually fixed to the worktable using bolts. When companies need to produce springs of different specifications, they often need to frequently change the retaining rings of different sizes. Using bolts for fixing makes the disassembly and assembly process extremely cumbersome. Operators need to use wrenches and other tools to tighten the screws one by one, which is not only time-consuming and labor-intensive but also prone to thread stripping or wear of positioning holes due to frequent disassembly and assembly, thus affecting the installation accuracy of the mold and the long-term stability of the equipment.

[0004] Therefore, this utility model proposes a sand and gravel ratio separation and screening device for construction to overcome the shortcomings of the prior art. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a positioning turntable mechanism for a spring wave, aiming to improve the existing technology of spring wave processing equipment, which suffers from problems such as the reliance on screw tightening for tooling and fixture replacement, cumbersome and time-consuming disassembly and assembly leading to low line change efficiency, and the lack of a continuous automated processing structure integrating feeding, hot pressing, and cold setting, resulting in low production efficiency and poor product consistency.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a positioning turntable mechanism for a spring wave, comprising a frame, a worktable disposed on the top of the frame, and a hot pressing module and a cold setting module disposed above the worktable and distributed in different positions; as well as a turntable mechanism and a quick-release assembly for quickly locking the mold; The quick-release assembly features a unique internal expansion ball lock structure, comprising a fixed ring, a protective sleeve, a rotating ring, a rotating column, a screw, a conical block, and a retaining ball. The protective sleeve passes through the fixed ring and is inserted into the workbench. The screw is located inside the protective sleeve and is threaded to the inner wall of the protective sleeve. The rotating column connects the screw and the rotating ring to transmit torque. The conical block is located at the bottom end of the screw. The retaining ball is movably located in a through hole on the side wall of the protective sleeve and abuts against the outer conical surface of the conical block. Furthermore, the turntable mechanism, the quick-release assembly, the worktable, and the frame are combined through a specific spatial relationship: the motor of the turntable mechanism is located inside the frame to drive the fixed base to rotate; the cylinder on the outer wall of the fixed base drives the clamp to vertically lift and lower to grip the spring located on the fixed ring; the quick-release assembly drives the conical block to move axially by rotating the rotating ring, thereby squeezing the ball to protrude radially and engage with the inner wall of the worktable, thus achieving rapid locking of the fixed ring; Preferably, the inner wall of the workbench is provided with a mounting hole that precisely matches the protective sleeve. The inner wall of the mounting hole is recessed with a groove to accommodate the protruding ball. When the conical block moves down, the outer conical surface of the conical block squeezes the ball so that it protrudes radially and is locked into the groove, thereby forming a rigid interlock to ensure the stability of the mold during processing. Preferably, the outer wall of the fixed seat of the turntable mechanism is evenly distributed with four sets of cylinders and clamps along the circumferential direction. The four sets of clamps correspond to the feeding station, hot pressing station, cold setting station and natural cooling station respectively. This cross-shaped four-station layout enables the equipment to perform multiple processes at the same time, which greatly improves the production cycle. Preferably, the hot pressing module is located at a position 180 degrees counterclockwise from the turntable mechanism, and the cold setting module is located at a position 270 degrees counterclockwise from the turntable mechanism. This cross-station layout reserves a natural cooling stroke between hot pressing and cold pressing, and uses the ambient temperature difference for auxiliary cooling, thus optimizing the process flow. Preferably, the cylinder is rigidly arranged in a vertical direction. The cylinder drives the clamp to move vertically up and down to clamp or release the spring placed on the fixed ring. The vertical action design avoids the interference of lateral force on the spring and improves the clamping and positioning accuracy. Preferably, the screw moves axially within the protective sleeve. When the screw moves downward, it pushes the conical block to move downward synchronously. When the screw moves upward, it drives the conical block to move upward synchronously. The rotational motion is converted into axial locking force through a simple helical transmission. The structure is simple and has good self-locking performance. Preferably, the rotating ring and the rotating column are fixedly connected, and the rotating column drives the screw to rotate synchronously. The integrated transmission chain design reduces the movement gap and improves the operating feel. Preferably, the outer diameter of the conical block gradually decreases from top to bottom to form a frustum shape, and the diameter of the locking ball is greater than the wall thickness of the protective sleeve sidewall, ensuring that the locking ball can protrude a sufficient distance to achieve reliable locking, while preventing the locking ball from completely falling off.

[0007] This utility model has the following beneficial effects: 1. This utility model solves the problem of low production efficiency caused by single-station operation and discontinuous process in the existing technology of spring wave processing by evenly setting four sets of clamps on the outer wall of the fixed seat of the turntable mechanism, and cooperating with the hot pressing module and cold setting module distributed along the circumference. It achieves the technical effect of realizing the fully automated continuous operation of spring wave feeding, hot pressing, natural cooling, cold setting and unloading, which significantly improves production efficiency and processing consistency.

[0008] 2. This utility model designs a quick-release component based on the principle of inclined plane force enhancement and ball locking. It uses a rotating column to drive the screw to move axially, pushing the conical block to squeeze the ball and expand radially to embed it into the worktable slot. This solves the problem in the prior art that the replacement of fixtures such as fixed rings requires the use of tools to tighten screws and is cumbersome and time-consuming to disassemble and assemble. It achieves the technical effect of quickly completing mold locking and releasing without auxiliary tools, greatly shortening mold change time and improving the flexible production capacity of the equipment.

[0009] 3. This utility model directly drives the clamp to lift vertically by vertically mounting the cylinder on a rotating fixed base, and with the central rotation structure driven by the motor, it solves the problems of complex coordination between the clamping mechanism and the transmission mechanism and difficulty in ensuring positioning accuracy in the prior art. It achieves the technical effect of compact structure, direct and reliable action, and can ensure that the position of the spring wave is accurate and stable during high-speed circulation, thereby reducing the product defect rate. Attached Figure Description

[0010] Figure 1 This is a perspective view of a positioning turntable mechanism for a spring wave proposed in this utility model; Figure 2 A schematic diagram of the fixture for a positioning turntable mechanism for a spring wave proposed in this utility model; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional schematic diagram of the protective sleeve for a positioning turntable mechanism for a spring wave proposed in this utility model.

[0011] Legend: 1. Frame; 2. Workbench; 3. Hot pressing module; 4. Cold setting module; 5. Turntable mechanism; 501. Motor; 502. Fixture; 503. Cylinder; 504. Clamp; 6. Quick release assembly; 601. Fixing ring; 602. Protective sleeve; 603. Rotating ring; 604. Rotating column; 605. Screw; 606. Conical block; 607. Ball clamp. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Reference Figures 1-4 The present invention provides an embodiment of a positioning turntable mechanism for a spring, comprising a frame 1 as an overall support base, a platform-shaped worktable 2 fixedly installed on the top of the frame 1, and a hot pressing module 3 and a cold setting module 4 suspended above the worktable 2. The worktable 2 is used to support the processing station and mold components, the hot pressing module 3 is used to heat and set the spring, and the cold setting module 4 is used to pressurize and cool the spring after hot pressing. To achieve automated flow and processing at multiple workstations, the core of the mechanism is equipped with a turntable mechanism 5 and a quick-release component 6 for quickly fixing molds. The turntable mechanism 5 is installed at the junction of the frame 1 and the worktable 2, and the quick-release component 6 is embedded in the table surface of the worktable 2. The two work together to form a complete automated processing and quick mold change platform. Specifically, the turntable mechanism 5 includes a motor 501 that provides rotational power, a fixed seat 502 that serves as a rotation carrier, a cylinder 503 that provides clamping power, and a clamp 504 for clamping the workpiece. The motor 501 is fixedly installed in the internal space of the frame 1. The output shaft of the motor 501 passes vertically upward through the central through hole of the worktable 2 and is fixedly connected to the bottom of the fixed seat 502. The fixed seat 502 is driven to rotate circumferentially relative to the surface of the worktable 2 by the motor 501. Four sets of cylinders 503 and corresponding clamps 504 are evenly distributed along the circumference of the outer wall of the fixed base 502, forming a cross-shaped four-station layout. The four sets of clamps 504 correspond to the loading station, hot pressing station, cold setting station and natural cooling station on the worktable 2, respectively. The cylinders 503 are fixedly installed on the side wall of the fixed base 502 in a vertical position. The telescopic end of the cylinder 503 is fixedly connected to the clamp 504 through the connecting plate. The cylinder 503 drives the clamp 504 to rise and fall vertically to clamp and fix or release the spring placed below. The bottom of the clamp 504 is provided with a pressure ring structure that matches the shape of the mold to ensure stable clamping. To meet the need for quick mold replacement, the quick-release assembly 6 includes a retaining ring 601 for bearing the spring wave, a protective sleeve 602 for guiding and supporting, a rotating ring 603 as an operating knob, a rotating column 604 for transmitting torque, a screw 605 for driving axial displacement, a conical block 606 for expansion and locking, and a locking ball 607 as a locking actuator. The fixing ring 601 is placed horizontally on the top surface of the workbench 2. The protective sleeve 602 is a hollow cylinder that passes through the central hole of the fixing ring 601 and is vertically inserted into the workbench 2. Several through holes are opened circumferentially on the lower part of the side wall of the protective sleeve 602. The retaining ball 607 is movably embedded in the through holes. The diameter of the retaining ball 607 is designed to be greater than the wall thickness of the side wall of the protective sleeve 602, so that the retaining ball 607 can protrude outward from the through holes. In terms of driving logic, the rotating ring 603 is fixedly connected to the top of the rotating column 604. The rotating column 604 is rotatably mounted on the upper part of the inner cavity of the protective sleeve 602 through the bearing. The bottom end of the rotating column 604 is fixedly connected to the top end of the screw 605. The rotating ring 603 and the rotating column 604 are fixedly connected. The rotating column 604 drives the screw 605 to rotate synchronously. The screw 605 and the inner wall of the protective sleeve 602 are provided with a threaded connection structure. Utilizing the threaded transmission principle, the screw 605 moves axially within the protective sleeve 602. When the screw 605 moves downward, it pushes the conical block 606 to move downward synchronously. When the screw 605 moves upward, it drives the conical block 606 to move upward synchronously. The conical block 606 is fixedly mounted on the bottom end of the screw 605. The outer diameter of the conical block 606 gradually decreases from top to bottom to form a frustum-shaped outer conical surface. The inner side of the retaining ball 607 always abuts against the outer conical surface of the conical block 606. The inner wall of the worktable 2 is provided with a mounting hole that is clearance-fitted with the outer diameter of the protective sleeve 602. The inner wall of the mounting hole is recessed with a retaining groove corresponding to the position of the retaining ball 607. When the conical block 606 moves down, the outer conical surface of the conical block 606 squeezes the retaining ball 607 so that it protrudes radially outward and is locked into the retaining groove, thereby achieving rigid locking between the protective sleeve 602 and the worktable 2, and then firmly pressing the fixing ring 601 onto the surface of the worktable 2. In the main structure of the quick-release component 6, the screw 605 serves as the driving core and is located in the hollow inner cavity of the protective sleeve 602. The outer circumferential surface of the screw 605 is provided with an external thread, and correspondingly, the inner wall of the protective sleeve 602 is provided with a matching internal thread section. Through the thread engagement, the rotational motion is converted into axial linear motion. The rotating column 604 serves as a torque transmission component. Its lower end face is fixedly connected to the upper end face of the screw 605, and its upper end protrudes through the top of the protective sleeve 602 and is fixedly connected to the rotating ring 603. The rotating ring 603 preferably adopts a ring or knob-shaped design that is easy to operate by hand, so that the operator can manually apply the rotational torque. The conical block 606, as a radial force conversion element, is coaxially fixed to the bottom end of the screw 605. The outer circumferential surface of the conical block 606 is designed as a smooth conical surface that is wider at the top and narrower at the bottom. Its taper design is calculated to ensure that it can provide sufficient radial displacement within the axial movement stroke of the screw 605. Multiple through holes are evenly opened along the circumferential direction on the lower side wall of the protective sleeve 602. The through holes penetrate the inner and outer walls of the protective sleeve 602. Each through hole contains a retaining ball 607, which is a hard steel ball, and the retaining ball 607 is located between the conical block 606 and the inner wall of the worktable 2. The workbench 2 serves as a mating base, and its surface is provided with a vertical mounting hole for inserting the protective sleeve 602. Deep inside the mounting hole, corresponding to the height of the through hole on the protective sleeve 602, a groove with an arc-shaped cross section is provided around it. The depth of the groove is less than the radius of the ball 607, and it is used to accommodate the protruding part of the ball 607. In the assembled and locked state, the operator rotates the rotating ring 603 clockwise, causing the rotating column 604 and the screw 605 to rotate synchronously. Due to the threaded transmission, the screw 605 moves downward relative to the protective sleeve 602, thereby pushing the conical block 606 downward. As the conical block 606 moves downward, its outer conical surface gradually squeezes the inner side of the retaining ball 607, forcing the retaining ball 607 to move radially outward along the through hole. The outer part of the retaining ball 607 then embeds into the retaining groove on the inner wall of the worktable 2. At this time, the retaining ball 607 is locked in the protruding position by the conical block 606 and cannot be retracted, thus forming a rigid ball lock connection between the protective sleeve 602 and the worktable 2, firmly locking the entire quick-release assembly 6 together with its top fixing ring 601 on the worktable. Conversely, when the mold needs to be disassembled, the operator rotates the rotating ring 603 counterclockwise, and the screw 605 drives the conical block 606 to move upward. The radial squeezing force of the conical block 606 on the retaining ball 607 disappears, and the narrower area at the bottom of the conical block 606 aligns with the retaining ball 607, leaving space for the retaining ball 607 to retract. At this time, the protective sleeve 602 is pulled upward, and the retaining ball 607 automatically retracts inward into the protective sleeve 602 under the squeezing of the edge of the retaining groove, thus disengaging from the locked state. The component can then be easily removed for replacement. This quick-release structure, based on the principle of inclined plane force enhancement and ball locking, completely replaces the traditional screw locking method. The operation process does not require any auxiliary tools, shortens the mold change time, and the locking force is uniform and reliable, ensuring the accuracy and stability of the spring wave processing positioning. For the control system that drives the rotation of the turntable mechanism 5 and the action of the cylinder 503, those skilled in the art can use a PLC controller combined with conventional electrical components such as solenoid valves and drivers to achieve logic control. The specific circuit connection and program control are well-known technologies in the field and will not be described in detail here. As a preferred embodiment, in order to improve the stability and centering accuracy of the fixed ring 601 when locking with the worktable 2, the mounting hole on the inner wall of the worktable 2 and the outer wall of the protective sleeve 602 are fitted with a precision clearance fit, and the cross-sectional shape of the groove recessed on the inner wall of the mounting hole is preferably an arc shape, with a radius of curvature slightly larger than the radius of the ball 607, so that the ball 607 can obtain the maximum contact area when it is inserted, thereby dispersing the locking stress and preventing wear on the edge of the groove due to long-term use; As another preferred embodiment, in order to adapt to the processing requirements of different specifications of springs and ensure the smooth switching of workstations, the four sets of cylinders 503 and clamps 504 distributed on the outer wall of the fixed seat 502 in the turntable mechanism 5 are arranged evenly at 90-degree intervals, so that each clamp 504 can accurately align with the worktable 2 below when the motor 501 drives the fixed seat 502 to rotate 90 degrees or 180 degrees. Specifically, the hot pressing module 3 is located at 180 degrees of the counterclockwise rotation path of the turntable mechanism 5, and the cold setting module 4 is located at 270 degrees of the counterclockwise rotation path of the turntable mechanism 5. This cross-station layout design cleverly utilizes the space and time difference of the turntable, so that the spring wave has a natural displacement stroke before rotating to the cold setting station after hot pressing. This stroke serves as a natural cooling station, using ambient air to initially cool the high-temperature spring wave, reducing the investment in active cooling equipment. As a further preferred embodiment, in order to improve the reliability of the clamping action and protect the spring from damage, the cylinder 503 is rigidly installed in a vertical direction. The piston rod end of the cylinder 503 is provided with a connecting flange, which is fixedly connected to the top of the clamp 504 by bolts. The shape of the pressure ring provided at the bottom of the clamp 504 is highly consistent with the shape of the fixed ring 601 and the edge of the spring. The contact surface of the pressure ring can be provided with a high-temperature resistant silicone pad, which can not only ensure that it can withstand high temperature in the hot pressing position, but also provide flexible buffer to prevent hard clamping from damaging the fragile surface texture of the spring. As another preferred embodiment, in order to ensure the feel and ease of force application when the operator turns the rotating ring 603, the outer edge of the rotating ring 603 is provided with an anti-slip knurled texture to increase friction, and the outer diameter of the rotating ring 603 is designed to be larger than the outer diameter of the protective sleeve 602 to form a flange structure that is easy to grip. The rotating column 604 and the screw 605 can also be designed as an integral molding structure to eliminate assembly gaps and improve transmission rigidity. In addition, to prevent the cone block 606 from moving too far downward, causing the ball 607 to come out or get stuck, a limiting step can be set at the bottom of the screw 605 or the bottom of the inner cavity of the protective sleeve 602 to limit the maximum downward stroke of the cone block 606, ensuring that the ball 607 retains part of the ball in the through hole even in the maximum locking state, thus maintaining the integrity of the structure.

[0014] Working principle: Before the spring wave processing, the mold is first installed and prepared. The operator places the quick-release assembly 6 with the corresponding specification fixing ring 601 at the predetermined station hole of the worktable 2. At this time, the rotating ring 603 is in the loose state, the conical block 606 is in the high position, and the retaining ball 607 is retracted in the protective sleeve 602. After inserting the protective sleeve 602 into the mounting hole of the worktable 2, the rotating ring 603 is rotated clockwise. The rotating column 604 drives the screw 605 to rotate and move downward, pushing the conical block 606 to move down and squeeze the retaining ball 607, so that the retaining ball 607 expands radially and is inserted into the retaining groove on the inner wall of the worktable 2, thereby quickly completing the locking and positioning of the fixing ring 601. During the actual processing, the operator is positioned in front of the frame 1 and places the ball to be processed on the fixed ring 601 of the loading station. Then, the device is started, and the cylinder 503 corresponding to the station is activated, driving the clamp 504 to descend vertically and securely hold the ball on the fixed ring 601 to ensure that no displacement occurs during subsequent rotation. Next, motor 501 drives fixed base 502 to rotate 180 degrees counterclockwise, directly delivering the workstation holding the spring to the bottom of hot pressing module 3. Hot pressing module 3 presses down to heat and shape the spring. After hot pressing is completed, motor 501 continues to drive fixed base 502 to rotate 90 degrees counterclockwise, and the spring leaves the hot pressing area and enters the natural cooling process. During this process, the temperature of the spring gradually decreases and it is initially shaped. Subsequently, the turntable mechanism 5 drives the spring to the bottom of the cold setting module 4. The cold setting module 4 presses, cools, and shapes the spring, further eliminating internal stress and ensuring the stability of the finished product shape. Finally, the motor 501 drives the fixed seat 502 to rotate 90 degrees counterclockwise, taking the processed spring back to the initial loading station. The cylinder 503 retracts, the clamp 504 rises and releases the spring, and the operator takes out the finished product and puts in a new workpiece to start the next cycle. Since the fixed seat 502 is equipped with four sets of clamps, the above processes are carried out simultaneously at four stations, realizing efficient continuous production line production.

Claims

1. A positioning turntable mechanism for a spring wave, comprising a frame (1), a worktable (2) disposed on the top of the frame (1), and a hot pressing module (3) and a cold setting module (4) disposed above the worktable (2). Its features are, It also includes a turntable mechanism (5) and a quick-release assembly (6); The turntable mechanism (5) includes a motor (501), a fixed base (502), a cylinder (503), and a clamp (504); the motor (501) is located inside the frame (1), and the output shaft of the motor (501) passes through the worktable (2) and is fixedly connected to the fixed base (502); The cylinder (503) is located on the side wall of the fixed base (502), and the telescopic end of the cylinder (503) is connected to the clamp (504). The quick-release assembly (6) includes a retaining ring (601), a protective sleeve (602), a rotating ring (603), a rotating column (604), a screw (605), a conical block (606), and a retaining ball (607). The fixing ring (601) is placed on the top of the workbench (2), and the protective sleeve (602) passes through the fixing ring (601) and is inserted into the workbench (2); The rotating ring (603) is connected to the top of the rotating column (604), and the rotating column (604) is rotatably disposed inside the protective sleeve (602) and its bottom end is connected to the screw (605). The screw (605) is threaded to the inner wall of the protective sleeve (602), and the conical block (606) is located at the bottom end of the screw (605); the side wall of the protective sleeve (602) is provided with a through hole, and the ball (607) is movably located in the through hole and abuts against the outer conical surface of the conical block (606).

2. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The inner wall of the workbench (2) is provided with an installation hole that mates with the protective sleeve (602). The inner wall of the installation hole is recessed with a slot. When the conical block (606) moves down, the outer conical surface of the conical block (606) presses the ball (607) so that it protrudes radially and is inserted into the slot.

3. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The outer wall of the fixed seat (502) is evenly distributed with four sets of cylinders (503) and clamps (504) along the circumferential direction. The four sets of clamps (504) correspond to the feeding station, hot pressing station, cold setting station and natural cooling station, respectively.

4. The positioning turntable mechanism for a spring wave according to claim 3, characterized in that: The hot pressing module (3) is located 180 degrees counterclockwise from the turntable mechanism (5), and the cold setting module (4) is located 270 degrees counterclockwise from the turntable mechanism (5).

5. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The cylinder (503) is vertically arranged, and the cylinder (503) drives the clamp (504) to move vertically up and down to clamp or release the spring placed on the fixed ring (601).

6. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The screw (605) moves axially within the protective sleeve (602). When the screw (605) moves downward, it pushes the conical block (606) to move downward synchronously. When the screw (605) moves upward, it drives the conical block (606) to move upward synchronously.

7. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The rotating ring (603) and the rotating column (604) are fixedly connected, and the rotating column (604) drives the screw (605) to rotate synchronously.

8. The positioning turntable mechanism for a spring wave according to claim 1, characterized in that: The outer diameter of the conical block (606) gradually decreases from top to bottom, and the diameter of the ball (607) is greater than the wall thickness of the side wall of the protective sleeve (602).

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