Mask breather valve welding mechanism
By employing a parallel design of multiple welding heads and a rotating shaft assembly in the mask production equipment, the problem of low efficiency caused by frequent movement of the welding heads was solved, achieving efficient welding of the breathing valve and improving production efficiency and welding quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-14
- Publication Date
- 2026-04-07
AI Technical Summary
In current mask production, the welding efficiency of the breathing valve welding device is low, mainly because the welding head needs to move frequently between the material picking and welding positions, which leads to a longer production cycle.
The design employs multiple welding heads in parallel, and the welding heads can be rotated and switched through a rotating shaft assembly. When one welding head is welding, another welding head picks up the breather valve at the material pick-up position. Combined with a linear drive assembly, the welding heads can move up and down, avoiding frequent back-and-forth movements.
It significantly improves the welding efficiency of breather valves, shortens the production cycle, increases production efficiency, and ensures the stability and quality of welding.
Smart Images
Figure CN224089690U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of mask production equipment, specifically to a mask breathing valve welding mechanism. Background Technology
[0002] In mask production, welding the breathing valve is one of the key steps. Currently, the main welding technology for breathing valves is ultrasonic welding. Using tools such as robotic arms or suction cups, the breathing valve is picked up from the material handling position and transferred to the welding position. Ultrasonic welding technology is then used to firmly weld the breathing valve onto the mask.
[0003] Most current welding equipment uses a single material handling and welding method. The welding head needs to pick up the breather valve at the material handling position, then move to the welding position to weld, and then return to the material handling position after welding. This process not only increases the movement time of the welding head, but also leads to a longer production cycle time and low welding efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a novel mask breathing valve welding mechanism that can significantly improve the welding efficiency of the breathing valve.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] This utility model provides a mask breathing valve welding mechanism, including:
[0007] Mounting base, the mounting base is mounted on a workbench, the workbench having a material pick-up position for providing the breather valve and a welding position for welding the breather valve;
[0008] A welding head assembly is rotatably mounted on the mounting base via a rotating shaft assembly. It includes multiple welding heads that are equally spaced and independent of each other along the circumferential direction. When one of the welding heads is in the material picking position, the other welding head is in the welding position. The welding head is equipped with a suction cup that can pick up the breather valve.
[0009] A rotation drive assembly, disposed on the mounting base and used to drive the welding head assembly to rotate; and...
[0010] A linear drive assembly, disposed on the mounting base, having a first linear drive assembly located above the material picking position and capable of driving the welding head at the material picking position to move in the vertical direction, and a second linear drive assembly located above the welding position and capable of driving the welding head at the welding position to move in the vertical direction.
[0011] Preferably, the first linear drive component and the second linear drive component respectively have an initial state in which they are not in contact with the welding head at their respective positions and a working state in which they are in contact with the welding head at their respective positions and can drive the welding head to move.
[0012] Preferably, the welding head includes a connecting seat, a welding head body slidably disposed on the connecting seat in a vertical direction, and an elastic member abutting between the welding head body and the connecting seat. The elastic member causes the welding head body to have an upward movement and a return to its original position. The suction cup is disposed at the lower end of the welding head body.
[0013] In some embodiments, the welding head further includes a guide groove disposed on the connecting seat and extending in the vertical direction, and a guide post slidably disposed in the guide groove. The guide post is connected to the welding head body and is used to restrict the welding head body from sliding in the vertical direction.
[0014] In some embodiments, the elastic element is a spring.
[0015] Preferably, the welding head has 2 to 6 parts.
[0016] In some embodiments, the welding head has four parts, i.e., the included angle between any two adjacent welding heads and their rotation axis is 90°.
[0017] In some implementations, the plurality of welding heads share a single connector.
[0018] Preferably, the welding position and the material taking position are located on opposite sides of the rotation axis of the welding head assembly.
[0019] Preferably, the rotating shaft assembly includes a bushing fixedly connected to the mounting base and a rotating shaft rotatably disposed within the bushing. A plurality of independent air guide channels are formed between the bushing and the rotating shaft. The two ends of the air guide channels are respectively located on the bushing and the rotating shaft. The two ends of the rotating shaft are respectively connected to the rotation drive assembly and the welding head assembly.
[0020] In some embodiments, the bushing has a first air guide port corresponding to the welding head, and the rotating shaft has an annular groove and a gas channel corresponding to the first air guide port. The annular groove is located on the outer surface of the rotating shaft and is connected to its corresponding first air guide port. The first air guide port, its corresponding annular groove, and the gas channel constitute a gas guide cavity.
[0021] Preferably, the second linear drive assembly includes a linear drive motor mounted on the mounting base, a drive seat slidably disposed on the mounting base in the vertical direction, and an elastic buffer located between the output end of the linear drive motor and the drive seat.
[0022] More preferably, the elastic buffer is a spring.
[0023] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:
[0024] This invention features multiple welding heads that can be rotated and switched. When one welding head is performing a welding operation, another welding head can simultaneously pick up the breather valve at the material pick-up position, eliminating the need to wait for the previous welding action to complete before picking up the material, thus improving welding efficiency. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the welding mechanism for the mask breathing valve provided in Example 1;
[0026] Figure 2 The right view of the mask breathing valve welding mechanism provided in Embodiment 1;
[0027] Figure 3 This is a schematic diagram of the welding head provided in Example 1;
[0028] Figure 4 A cross-sectional view of the welding head provided in Example 1;
[0029] Figure 5 This is a schematic diagram of the structure of the rotating shaft assembly provided in Embodiment 1;
[0030] Figure 6 A cross-sectional view of the rotating shaft assembly provided in Embodiment 1;
[0031] Among them, 11. Mounting base;
[0032] 12. Welding head assembly; 121. Welding head body; 122. Connecting seat; 123. Elastic element; 124. Suction cup; 125. Guide post;
[0033] 13. Rotary shaft assembly; 131. Bushing; 1311. First air inlet; 132. Rotary shaft; 1321. Annular groove; 1322. Gas passage; 1323. Second air inlet;
[0034] 14. Rotation drive assembly;
[0035] 15. First linear drive component;
[0036] 16. Second linear drive assembly; 161. Linear drive motor; 162. Drive base; 163. Elastic buffer;
[0037] 2. Breathing valve. Detailed Implementation
[0038] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0039] In the description of the embodiments of this utility model, it should be understood that the terms "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the appendix. Figure 1 The orientation or positional relationship is shown. For example, the welding head is located below, and the first linear drive component 15 is located to the left. The above orientation or positional relationship is only for the convenience of describing the embodiments of this utility model and simplifying the description, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.
[0040] In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly specified.
[0041] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0042] To simplify the disclosure of embodiments of the present invention, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the present invention. Furthermore, reference numerals and / or letters may be repeated in different examples of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0043] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0044] Example 1
[0045] A mask breathing valve welding mechanism, such as Figures 1 to 6As shown, it includes a mounting base 11 mounted on a workbench (not shown), a welding head assembly 12 rotatably mounted on the mounting base 11 via a rotating shaft assembly 13, and a rotation drive assembly 14 and a linear drive assembly mounted on the mounting base 11. The workbench has a material pick-up position for providing the breathing valve 2 and a welding position for welding the breathing valve 2. A material conveying mechanism is provided at the material pick-up position of the workbench for conveying the breathing valve 2 to the material pick-up position. The material conveying mechanism includes, but is not limited to, a conveyor belt. A breathing valve welding device (such as an ultrasonic generator) is provided at the welding position of the workbench, which can cooperate with the welding mechanism to weld the breathing valve 2 to the mask. The workbench can refer to the prior art, and will not be described in detail in this application.
[0046] The welding head assembly 12 includes multiple welding heads arranged at equal intervals along the circumference and independent of each other. When one welding head is in the material-taking position, another welding head is in the welding position. The welding head is equipped with a suction cup 124 capable of picking up the breathing valve 2. In existing mask breathing valve welding mechanisms, the welding head usually needs to move repeatedly between the material-taking position and the welding position to complete a single material taking, welding, and then returning to the material-taking position. This single-thread operation mode greatly limits production efficiency. By setting multiple welding heads and enabling them to rotate and switch, when one welding head is performing a welding operation, another welding head can simultaneously pick up the breathing valve 2 at the material-taking position. This parallel operation mode avoids the inefficient process of frequent back-and-forth movements of the welding head in traditional welding equipment and significantly shortens the production cycle. Through further research, the applicant found that when there are two welding heads, the two welding heads need to rotate 180° to switch. The rotation angle is large, and if the rotation rate is fast, it will cause the welding head assembly 12 to vibrate, which is not conducive to the smooth welding process. However, when there are more than four welding head assemblies 12, it will lead to an increase in cost. Considering cost, efficiency, and welding stability, four welding heads are preferred, i.e., the included angle between two adjacent welding heads and the rotation axis of the welding head assembly 12 is 90°.
[0047] Taking one welding head as an example, the welding head includes a connecting seat 122, a welding head body 121 slidably disposed on the connecting seat 122 in the vertical direction, and an elastic member 123 abutting between the welding head body 121 and the connecting seat 122. The elastic member 123 causes the welding head body 121 to have an upward movement and return to its original position. A suction cup 124 is disposed at the lower end of the welding head body 121. Preferably, the welding head also includes a guide groove disposed on the connecting seat 122 and extending in the vertical direction, and a guide post 125 slidably disposed in the guide groove and in the same direction as the extension of the guide groove. The guide post 125 is connected to the welding head body 121 and is used to limit the sliding of the welding head body 121 in the vertical direction. Preferably, multiple welding heads on the welding head assembly 12 share a single connecting seat 122.
[0048] A linear drive assembly is mounted on the mounting base 11. It includes a first linear drive assembly 15 located above the material picking position and capable of driving the welding head at the material picking position to move vertically, and a second linear drive assembly 16 located above the welding position and capable of driving the welding head at the welding position to move vertically. The first linear drive assembly 15 and the second linear drive assembly 16 each have an initial state where they are not in contact with the welding head at their respective positions, and an operating state where they are in contact with the welding head at their respective positions and capable of driving the welding head to move, thus ensuring that the linear drive assembly does not interfere with the rotation of the welding head. The first linear drive assembly 15 is a linear drive motor; the second linear drive assembly 16 includes a linear drive motor 161 mounted on the mounting base 11, a drive seat 162 sliding vertically on the mounting base 11, and an elastic buffer 163 located between the output end of the linear drive motor 161 and the drive seat 162. The elastic buffer 163 reduces the rigid connection between the output shaft and the drive seat 162, making the welding process smoother, reducing welding instability caused by load changes or external interference, and ensuring welding quality. The elastic buffer 163 is preferably a spring.
[0049] Because the welding head is connected to a vacuum suction device (such as a vacuum pump) via a vacuum tube, the vacuum tube will twist or become entangled when the welding head rotates continuously in either the forward or reverse direction, thus preventing continuous 360° forward or reverse rotation. The applicant has designed the rotating shaft assembly 13 to avoid interference from the vacuum tube when the welding head rotates. Specifically, the rotating shaft assembly 13 includes a bushing 131 fixedly connected to the mounting base 11 and a rotating shaft 132 rotatably disposed within the bushing 131. The connecting seat 122 of the welding head assembly 12 is connected to the rotating shaft 132, and the vacuum tube is connected to the bushing 131. By driving the rotating shaft 132 to rotate while the bushing 131 remains stationary, the entanglement or twisting of the vacuum tube as the welding head rotates is prevented. Furthermore, the bushing 131 has a first air vent 1311 corresponding to the welding head, and the vacuum tube is connected to the first air vent 1311. The rotating shaft 132 has an annular groove 1321 and a gas channel 1322 corresponding to the first gas inlet 1311. The annular groove 1321 is located on the outer surface of the rotating shaft 132 and is connected to the corresponding first gas inlet 1311. One end of the gas channel 1322 is connected to the corresponding annular groove 1321, and the other end (i.e., the second gas inlet 1323) is connected to and communicates with the corresponding welding head, which can be connected via a flexible pipe. When material is being removed, the first gas inlet 1311, the annular groove 1321, the gas channel 1322, and the second gas inlet 1323 form an airflow path connecting the welding head and the vacuum suction device.
[0050] The rotation drive assembly 14 is used to drive the welding head assembly 12 to rotate. Specifically, the rotation drive assembly 14 is located between the first linear drive assembly 15 and the second linear drive assembly 16, and its output shaft is connected to the rotating shaft 132 and can drive the rotating shaft 132 to rotate the welding head assembly 12 in the up and down direction.
[0051] The working principle of the four-head welding mechanism will be explained in detail below. The left and right welding heads are located at the material picking position and the welding position, respectively, and the remaining two welding heads are located at the welding preparation position and the material picking preparation position, respectively.
[0052] The output shaft of the first linear drive assembly 15 is controlled to move downward to push the welding head below it (i.e., the welding head located in the material picking position) downward synchronously. The welding head is controlled to pick up the breather valve 2. After picking up the valve, the first linear drive assembly 15 is controlled to reset. At this time, the welding head moves upward and resets under the elastic force of its elastic element 123, and the material picking is completed. Then, the rotation drive assembly 14 is controlled to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90°, so that the welding head with the breather valve 2 is rotated to the welding preparation position, and the welding head originally located in the material picking preparation position is rotated to the material picking position. The welding head located in the material picking position and the first linear drive assembly 15 are controlled to pick up the material. Then, the rotation drive assembly 14 is controlled again to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90°. At this time, the welding head located in the welding preparation position and holding the breathing valve 2 rotates to the welding position, while the welding head located in the material taking position and holding the breathing valve 2 rotates to the welding preparation position, and the welding head located in the material taking position rotates to the material taking position. The output shaft of the second linear drive assembly 16 is controlled to move downward and push the welding head below it (i.e., the welding head located in the welding position) to move downward synchronously. In cooperation with the ultrasonic generator, the breathing valve 2 is welded to the mask. After that, the welding head is controlled to break the vacuum and release the breathing valve 2, and the second linear drive assembly 16 is controlled to reset. At this time, the welding head located in the welding position moves upward and resets under the elastic force of its elastic element 123, and the welding is completed. At the same time, the first linear drive assembly 15 is controlled to take the material. The rotation drive assembly 14 is controlled again to drive the rotating shaft 132 to rotate the welding head assembly 12 by 90°. The welding head, which is located in the welding area and the breather valve 2 has been released, is rotated to the material preparation area. This process is repeated to continuously weld the breather valve 2.
[0053] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A mask breathing valve welding mechanism, characterized in that, include: Mounting base (11), which is mounted on a workbench having a material pick-up position for providing the breather valve (2) and a welding position for welding the breather valve (2); Welding head assembly (12), which is rotatably mounted on the mounting base (11) via a rotating shaft assembly (13), includes multiple welding heads that are equally spaced and independent of each other along the circumferential direction. When one of the welding heads is in the material picking position, the other welding head is in the welding position. The welding head is provided with a suction cup (124) that can pick up the breathing valve (2). A rotation drive assembly (14), which is disposed on the mounting base (11) and is used to drive the welding head assembly (12) to rotate; and, A linear drive assembly is disposed on the mounting base (11) and has a first linear drive assembly (15) located above the material picking position and capable of driving the welding head at the material picking position to move in the vertical direction, and a second linear drive assembly (16) located above the welding position and capable of driving the welding head at the welding position to move in the vertical direction.
2. The mask breathing valve welding mechanism according to claim 1, characterized in that, The first linear drive component (15) and the second linear drive component (16) respectively have an initial state in which they are not in contact with the welding head at their respective positions and a working state in which they are in contact with the welding head at their respective positions and can drive the welding head to move.
3. The mask breathing valve welding mechanism according to claim 1, characterized in that, The welding head includes a connecting seat (122), a welding head body (121) slidably disposed on the connecting seat (122) in the vertical direction, and an elastic member (123) abutting between the welding head body (121) and the connecting seat (122). The elastic member (123) causes the welding head body (121) to have an upward movement and return to its original position. The suction cup (124) is disposed at the lower end of the welding head body (121).
4. The mask breathing valve welding mechanism according to claim 3, characterized in that, The welding head also includes a guide groove provided on the connecting seat (122) and extending in the vertical direction, and a guide post (125) slidably provided in the guide groove, the guide post (125) being connected to the welding head body (121).
5. The mask breathing valve welding mechanism according to claim 3, characterized in that, The elastic element (123) is a spring.
6. The mask breathing valve welding mechanism according to claim 1 or 3, characterized in that, The welding head has four; and / or, The multiple welding heads share a single connector (122).
7. The mask breathing valve welding mechanism according to claim 1, characterized in that, The welding position and the material taking position are respectively located on opposite sides of the rotation axis of the welding head assembly (12).
8. The mask breathing valve welding mechanism according to claim 1, characterized in that, The rotating shaft assembly (13) includes a bushing (131) fixedly connected to the mounting base (11) and a rotating shaft (132) rotatably disposed within the bushing (131). A plurality of independent air guide channels are formed between the bushing (131) and the rotating shaft (132). The two ends of the air guide channels are respectively located on the bushing (131) and the rotating shaft (132). The two ends of the rotating shaft (132) are respectively connected to the rotation drive assembly (14) and the welding head assembly (12).
9. The mask breathing valve welding mechanism according to claim 8, characterized in that, The bushing (131) is provided with a first air vent (1311) corresponding to the welding head. The rotating shaft (132) has an annular groove (1321) and a gas channel (1322) corresponding to the first air inlet (1311). The annular groove (1321) is located on the outer surface of the rotating shaft (132) and is connected to its corresponding first air inlet (1311) and gas channel (1322). The first air inlet (1311) and its corresponding annular groove (1321) and gas channel (1322) constitute an air inlet cavity.
10. The mask breathing valve welding mechanism according to claim 1, characterized in that, The second linear drive assembly (16) includes a linear drive motor (161) mounted on the mounting base (11), a drive seat (162) slidably disposed on the mounting base (11) in the up-down direction, and an elastic buffer (163) located between the output end of the linear drive motor (161) and the drive seat (162).