Screw locking device for speaker net frame

Abstract

The utility model relates to automatic assembly equipment technical field of sound box, especially is a kind of screw locking equipment of sound box net frame, including cabinet, base plate and translation mechanical arm, the execution end of this mechanical arm is equipped with screw locking device, base plate is equipped with liftable conveyer table and positioning base, the upper portion of conveyer table is equipped with two conveyer belts, the lower side of positioning base is equipped with the positioning assembly for pushing sound box to the set position;The lower side of conveyer table and positioning base is respectively fixedly equipped with multiple guide slide rods and support slide rods, the upper portion of base plate is equipped with first driving mechanism and second driving mechanism, the positioning base is equipped with multiple locking through holes for screw locking device passing through.The utility model adopts multiple side shift measures to greatly improve the accurate positioning to sound box, and automatically complete the efficient, high consistency locking of all screws, screw locking processing is more accurate and reliable, and good product qualification rate is greatly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of automated assembly equipment for speakers, and in particular to a screw fastening device for speaker grilles. Background Technology

[0002] In the consumer electronics and professional audio manufacturing industries, the shell structure design of various speaker products (including multimedia speakers, Bluetooth speakers, soundbars, and large professional audio systems) generally includes a front or side grille to protect the internal speaker units and allow sound to pass through effectively. This grille is typically made of metal or plastic and is securely connected to the main speaker shell via multiple screw holes distributed around its perimeter and inside. Its core functions are physical protection, acoustic transmission, and providing an integrated aesthetic presentation for the product.

[0003] Currently, in mass production, the assembly of speaker grilles still heavily relies on traditional manual methods. Workers must use electric or pneumatic screwdrivers to tighten multiple screws one by one, aligning them with the pre-drilled holes on the grille and cabinet. This manual-intensive assembly method is facing increasing technical limitations and production bottlenecks as the industry demands higher product consistency, production efficiency, and manufacturing cost control. These limitations manifest in the following ways: 1. Low assembly efficiency restricts production cycle time. A single speaker grille typically has dozens of screws; manual screw fastening is repetitive and delicate labor, resulting in long assembly times for individual products and a clear physiological limit to overall work speed. This makes this workstation a bottleneck for the entire production line, unable to meet the high-paced production demands of modern assembly lines, and severely restricting the overall capacity ramp-up.

[0004] 2. Poor consistency in locking quality poses potential reliability risks. The quality of manual locking is highly dependent on the operator's skill level, physical condition, and sense of responsibility. In practice, defects such as "missed locks," "slipped threads," "floating locks" (insufficient torque), or "overlocks" (excessive torque) are prone to occur. Uneven or improper locking torque can lead to minor issues like loosening of the mesh frame and abnormal noise, damaging the product's acoustic performance; more serious issues may damage the housing threads or cause plastic parts to crack, directly affecting the product's structural strength, sealing performance, and long-term reliability, resulting in quality problems and after-sales risks.

[0005] 3. Difficulty in guaranteeing positioning accuracy affects appearance and assembly yield. The assembly of the grille and speaker housing requires extremely high positioning accuracy to ensure that all screw holes are perfectly aligned and that the grille fabric fits flatly and snugly against the cabinet surface, avoiding gaps, misalignment, or warping, which would affect the final aesthetics and texture of the product. Manual operation is difficult when aligning multiple holes simultaneously, often requiring repeated adjustments, which not only reduces efficiency but may also damage components due to forced fastening of misaligned parts, reducing the first-pass yield.

[0006] 4. High labor costs and complex management. Long-term reliance on skilled workers leads to rising labor costs, recruitment pressure, and training and skills transfer issues arising from staff turnover. Furthermore, the continuous quality supervision and standardized operation management of a large workforce also constitutes complex management costs.

[0007] 5. Work Environment and Occupational Health Challenges. Repetitive locking movements can easily lead to musculoskeletal strain in operators, such as carpal tunnel syndrome and other occupational diseases. Long-term exposure to the noise and vibration generated by power tools also poses a threat to workers' occupational health.

[0008] Currently, while general-purpose multi-axis locking robots or simple XYZ three-axis locking platforms exist on the market, they often suffer from poor adaptability, insufficient positioning flexibility, and low return on investment when dealing with products like speakers that have complex curved surfaces, diverse sizes, and varying mesh frame hole layouts. General-purpose equipment struggles to achieve rapid, accurate positioning and highly consistent locking of different speaker models while maintaining controllable costs. Utility Model Content

[0009] The technical problem to be solved by this utility model is to provide a highly flexible and high-precision automated screw fastening device specifically designed for speaker grille assembly.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a screw fastening device for a speaker grille, comprising a cabinet, a base plate fixed to the cabinet, and a translational robotic arm mounted on the rear of the base plate. The execution end of the robotic arm is equipped with a screw fastening device. A liftable conveyor platform and a liftable positioning base are movably mounted on the upper part of the base plate. Two symmetrically arranged conveyor belts for conveying speakers and a conveyor drive motor for driving the two conveyor belts are mounted on the upper part of the conveyor platform. A positioning component for pushing the speaker to a set position is mounted on the lower side of the positioning base. Multiple guide slides and support slides are fixedly mounted on the lower sides of the conveyor platform and the positioning base, respectively. A first drive mechanism and a second drive mechanism are mounted on the upper part of the base plate to drive the guide slides and support slides to move up and down, respectively. The positioning base has multiple fastening through holes for the screw fastening device to pass through.

[0011] Preferably, the positioning assembly includes a positioning fixture and a positioning cylinder transversely positioned to the lower side of the positioning base, with the positioning fixture fixedly mounted on the outer end of the piston rod of the positioning cylinder.

[0012] Preferably, the number of positioning components is two sets, which are symmetrically arranged on the lower side of the positioning base, and the positioning fixture has positioning grooves corresponding to the shape of the speaker end.

[0013] Preferably, the width of the positioning base is greater than the width of the conveyor platform, and the first conveying base is located within the interval between the support slide bars.

[0014] Preferably, the first driving mechanism is a first lifting cylinder that drives the conveyor platform to move up and down, and the first lifting cylinder is fixed to the lower part of the base plate; the lower part of the base plate is equipped with a synchronous lifting frame that is fixedly connected to the lower end of all the supporting slide rods, and the second driving mechanism is a second lifting cylinder that drives the synchronous lifting frame to move up and down.

[0015] Preferably, a support frame is fixedly mounted on the lower side of the substrate, and both the first lifting cylinder and the second lifting cylinder are fixedly mounted on the support frame.

[0016] Preferably, the conveyor platform is equipped with at least two longitudinally arranged slide bars, linear bearings located on the slide bars, a fixed upright plate fixed to one end of the slide bars, and a movable upright plate that is always parallel to the fixed upright plate. The movable upright plate is fixedly connected to the linear bearings.

[0017] Preferably, the conveyor platform is equipped with at least two longitudinally arranged slide bars, linear bearings located on the slide bars, a fixed upright plate fixed to one end of the slide bars, and a movable upright plate that is always parallel to the fixed upright plate. The movable upright plate is fixedly connected to the linear bearings. The conveyor platform is also equipped with a width adjusting screw and a wheel that drive the movable upright plate to move back and forth along the slide bars.

[0018] Preferably, the two conveyor belts are respectively installed on the inner sides of the fixed upright plate and the movable upright plate. Each of the inner sides of the fixed upright plate and the movable upright plate is equipped with a drive wheel and multiple rollers, and the conveyor belts are wound around the drive wheel and multiple rollers.

[0019] Preferably, the conveyor platform is equipped with a splined shaft that meshes with two drive wheels simultaneously, and the main shaft of the conveyor drive motor is connected to the splined shaft for transmission.

[0020] The beneficial effects of this utility model are as follows: This utility model provides a screw fastening device for speaker grilles. In practical applications, the speaker to be fastened is transported from two conveyor belts to the working area of ​​the screw fastening device. After the speaker arrives at the working area, the conveyor platform moves downward under the action of the first drive mechanism, and the speaker is then placed on the fixture table between the two conveyor belts. Subsequently, the positioning base moves downward to the working area of ​​the positioning component under the action of the second drive mechanism, facilitating the positioning component to further translate the speaker to a precise position, thereby facilitating the precise fastening process of the screw fastening device. This utility model adopts multiple lateral displacement measures to significantly improve the precise positioning of the speaker and automatically completes the efficient and highly consistent fastening of all screws, thus fundamentally overcoming the inherent defects of manual operation. The screw fastening process is more accurate and reliable, and the yield rate is further improved. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the screw fastening device for the speaker grille of this utility model.

[0022] Figure 2 This is a three-dimensional structural diagram of the screw fastening device of this utility model when it is concealed in the cabinet.

[0023] Figure 3 This is a three-dimensional structural diagram of the screw fastening device of this utility model when it is hidden in the cabinet, from another perspective.

[0024] Figure 4 This is a three-dimensional structural diagram of the screw fastening equipment of this utility model when the cabinet, the translational robotic arm, and the screw fastening device are concealed.

[0025] Figure 5 This is an exploded three-dimensional structural diagram of the screw fastening device of this utility model, showing the concealed cabinet, the translational robotic arm, and the screw fastening device.

[0026] Figure 6 This is a three-dimensional structural diagram of the screw fastening device of this utility model, showing the hidden cabinet, translational robotic arm and screw fastening device from another perspective.

[0027] Figure 7 This is a three-dimensional structural diagram of the screw fastening equipment, including the concealed cabinet, the translational robotic arm, and the screw fastening device, from another perspective. Detailed Implementation

[0028] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments. The content mentioned in the embodiments is not intended to limit the present invention.

[0029] like Figures 1 to 7As shown, a screw fastening device for a speaker grille includes a cabinet 11, a base plate 1 fixed to the cabinet 11, and a translational robotic arm 12 mounted on the rear of the base plate 1. The execution end of the robotic arm 12 is equipped with a screw fastening device 13. A liftable conveyor platform 2 and a liftable positioning base 3 are movably mounted on the upper part of the base plate 1. Two symmetrically arranged conveyor belts 21 for conveying speakers and a conveyor drive motor 22 for driving the two conveyor belts 21 are mounted on the upper part of the conveyor platform 2. A positioning component 4 for pushing the speaker to a set position is mounted on the lower side of the positioning base 3. Multiple guide slides 23 and support slides 33 are fixedly mounted on the lower sides of the conveyor platform 2 and the positioning base 3, respectively. A first drive mechanism and a second drive mechanism are mounted on the upper part of the base plate 1 to drive the guide slides 23 and support slides 33 to move up and down, respectively. The positioning base 3 has multiple fastening through holes for the screw fastening device 13 to pass through.

[0030] In practical applications, the speaker to be screwed is transported from two conveyor belts 21 to the working area of ​​the screw fastening device 13. Once the speaker arrives at the working area, the conveyor platform 2 moves downwards under the action of the first drive mechanism, placing the speaker on the fixture table between the two conveyor belts 21. Subsequently, the positioning base 3 moves downwards to the working area of ​​the positioning component 4 under the action of the second drive mechanism, facilitating further translation and precise positioning of the speaker by the positioning component 4, thus enabling precise screw fastening processing by the screw fastening device 13. This invention employs multiple lateral displacement measures to significantly improve the precise positioning of the speaker and automatically completes the efficient and consistent fastening of all screws, fundamentally overcoming the inherent defects of manual operation. Screw fastening processing is more accurate and reliable, and the yield rate is further improved.

[0031] In this embodiment, the positioning component 4 includes a positioning fixture 41 and a positioning cylinder 42 transversely positioned to the lower side of the positioning base 3. The positioning fixture 41 is fixedly mounted on the outer end of the piston rod of the positioning cylinder 42. Specifically, there are two sets of positioning components 4, which are symmetrically arranged on the lower side of the lower side of the positioning base 3. The positioning fixture 41 has a positioning groove 43 corresponding to the shape of the speaker end. During the positioning process of the positioning component 4, the two positioning fixtures 41 move closer together under the push of the two piston rods, and the specially customized positioning groove 43 structure is used to achieve precise positioning of the speaker. The positioning response speed is fast, the accuracy is high, and the work efficiency of the positioning process is greatly improved, making it highly practical.

[0032] In this embodiment, the width of the positioning base 3 is greater than the width of the conveyor platform 2, and the first conveying base is located within the interval between the supporting slide rods 33. This allows the positioning base 3 and the conveyor platform 2 to move up and down separately without interfering with each other. The structure is compact and ingenious, occupies little space, and is highly operable.

[0033] See Figure 6 and Figure 7 In this embodiment, the first driving mechanism is a first lifting cylinder 25 that drives the conveyor platform 2 to move up and down, and the first lifting cylinder 25 is fixed to the lower part of the base plate 1; the lower part of the base plate 1 is equipped with a synchronous lifting frame 34 that is fixedly connected to the lower end of all the support slide rods 33, and the second driving mechanism is a second lifting cylinder 35 that drives the synchronous lifting frame 34 to move up and down. Specifically, a support frame 31 is fixedly installed on the lower side of the base plate 1, and both the first lifting cylinder 25 and the second lifting cylinder 35 are fixedly installed on the support frame 31. After adopting this structural design, the positioning base 3 and the conveyor platform 2 can operate stably and reliably when moving up and down respectively. With the structural design of the support frame 31, the structural design complexity of the first driving mechanism and the second driving mechanism is greatly simplified. The first driving mechanism is cleverly embedded in the second driving mechanism without interfering with each other, which greatly reduces the space occupied by the driving mechanism, makes the structural design more compact, and makes the overall size of the screw-fastening equipment smaller, which is convenient for transportation and workshop layout, and is more practical.

[0034] In this embodiment, the conveyor platform 2 is equipped with at least two longitudinally arranged slide rods 26, linear bearings 27 located on the slide rods 26, a fixed upright plate 28 fixed to one end of the slide rods 26, and a movable upright plate 29 that is always parallel to the fixed upright plate 28. The movable upright plate 29 is fixedly connected to the linear bearings 27. The conveyor platform 2 is also equipped with a width adjusting screw 2A and a rotating wheel 2B for driving the movable upright plate 29 to move back and forth along the slide rods 26. Specifically, the two conveyor belts 21 are respectively installed on the inner sides of the fixed plate 28 and the movable plate 29. The inner sides of the fixed plate 28 and the movable plate 29 are each equipped with a drive wheel 2C and multiple rollers 2D, and the conveyor belts 21 are wound around the drive wheel 2C and multiple rollers 2D.

[0035] By rotating the rotary wheel 2B to drive the lead screw 2A, the specific positions of the movable vertical plate 29 and the lead screw 2A can be adjusted, thereby adjusting the distance between the fixed vertical plate 28 and the movable vertical plate 29, and thus achieving width adjustment between the two conveyor belts 21. When the model and size of the speaker to be processed change, the adjustment of the rotary wheel 2B can easily and quickly realize the adjustment and switching of the production mode of the new product. It is simple to operate, highly versatile, and more practical.

[0036] In this embodiment, the conveyor platform 2 is equipped with a splined shaft 2E that meshes with two drive wheels 2C simultaneously. The main shaft of the conveyor drive motor 22 is connected to the splined shaft 2E. During the width adjustment of the fixed plate 28 and the movable plate 29, the structure design of the splined shaft 2E and the drive wheel 2C ensures that the conveying drive of the conveyor belt 21 is not affected no matter how the distance between the fixed plate 28 and the movable plate 29 is adjusted. The structural design is more ingenious and reasonable, and has strong scalability.

[0037] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In this description of the utility model, "a number" means two or more, unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can also refer to a mechanical connection; they can refer to a direct connection or a connection through an intermediate medium; or they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A screw fastening device for a speaker grille, comprising a cabinet (11), a base plate (1) fixed to the cabinet (11), and a translational robotic arm (12) mounted on the rear of the base plate (1), wherein the actuator of the robotic arm (12) is equipped with a screw fastening device (13), characterized in that: The upper part of the base plate (1) is movably equipped with a liftable conveyor platform (2) and a liftable positioning base (3). The upper part of the conveyor platform (2) is equipped with two symmetrically arranged conveyor belts (21) for conveying the speaker and a conveyor drive motor (22) for driving the two conveyor belts (21) to operate. The lower side of the positioning base (3) is equipped with a positioning component (4) for pushing the speaker to a set position. The lower sides of the conveyor platform (2) and the positioning base (3) are respectively fixedly equipped with multiple guide slides (23) and support slides (33). The upper part of the base plate (1) is equipped with a first drive mechanism and a second drive mechanism for driving the guide slides (23) and support slides (33) to move up and down respectively. The positioning base (3) is provided with multiple locking through holes for the screw locking device (13) to pass through.

2. The screw fastening device for the speaker grille according to claim 1, characterized in that: The positioning component (4) includes a positioning fixture (41) and a positioning cylinder (42) that is transverse to the lower side of the positioning base (3). The positioning fixture (41) is fixedly installed on the outer end of the piston rod of the positioning cylinder (42).

3. The screw fastening device for the speaker grille according to claim 2, characterized in that: The number of positioning components (4) is two sets. The two sets of positioning components (4) are arranged symmetrically on the lower side of the positioning base (3). The positioning fixture (41) has a positioning groove (43) corresponding to the shape of the speaker end.

4. The screw fastening device for the speaker grille according to claim 1, characterized in that: The width of the positioning base (3) is greater than the width of the conveyor platform (2), and the first conveyor base is located within the interval between the support slide bars (33).

5. The screw fastening device for the speaker grille according to claim 1, characterized in that: The first driving mechanism is a first lifting cylinder (25) that drives the conveyor platform (2) to move up and down. The first lifting cylinder (25) is fixed to the lower part of the base plate (1). The lower part of the base plate (1) is equipped with a synchronous lifting frame (34) that is fixedly connected to the lower end of all the support slide rods (33). The second driving mechanism is a second lifting cylinder (35) that drives the synchronous lifting frame (34) to move up and down.

6. The screw fastening device for the speaker grille according to claim 5, characterized in that: A support frame (31) is fixedly installed on the lower side of the substrate (1), and the first lifting cylinder (25) and the second lifting cylinder (35) are both fixedly installed on the support frame (31).

7. The screw fastening device for the speaker grille according to claim 1, characterized in that: The conveyor platform (2) is equipped with at least two longitudinally arranged slide bars (26), a linear bearing (27) located on the slide bars (26), a fixed upright plate (28) fixed to one end of the slide bars (26), and a movable upright plate (29) that is always parallel to the fixed upright plate (28). The movable upright plate (29) is fixedly connected to the linear bearing (27).

8. The screw fastening device for the speaker grille according to claim 1, characterized in that: The conveyor platform (2) is equipped with at least two longitudinally arranged slide bars (26), a linear bearing (27) located on the slide bars (26), a fixed upright plate (28) fixed to one end of the slide bars (26), and a movable upright plate (29) that is always parallel to the fixed upright plate (28). The movable upright plate (29) is fixedly connected to the linear bearing (27). The conveyor platform (2) is also equipped with a width adjusting screw (2A) and a wheel (2B) that drive the movable upright plate (29) to move back and forth along the slide bars (26).

9. The screw fastening device for the speaker grille according to claim 8, characterized in that: The two conveyor belts (21) are respectively installed on the inner side of the fixed plate (28) and the movable plate (29). The inner side of the fixed plate (28) and the movable plate (29) is equipped with a drive wheel (2C) and multiple rollers (2D). The conveyor belts (21) are wound around the drive wheel (2C) and multiple rollers (2D).

10. The screw fastening device for the speaker grille according to claim 9, characterized in that: The conveyor platform (2) is equipped with a splined shaft (2E) that meshes with two drive wheels (2C) simultaneously, and the main shaft of the conveyor drive motor (22) is connected to the splined shaft (2E) for transmission.

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