An umbrella bead welding device

Abstract

This invention relates to the field of umbrella production equipment technology, and particularly to an umbrella bead welding device to solve the problem of needing to change different special molds when producing products with different numbers of umbrella ribs. The device includes a frame, a placement platform on the frame for placing umbrella fabric, and a welding device on the frame for welding umbrella beads onto the umbrella fabric. A rotating device is provided between the placement platform and the frame to drive the placement platform to rotate intermittently. The rotating device includes a support shaft on the frame, the placement platform being rotatably connected to the support shaft, and a rotating gear rotatably mounted on the support shaft. A first telescopic member is provided on the frame, and a rack is provided on the telescopic rod of the first telescopic member. The rack meshes with the rotating gear. A one-way rotation device is also provided between the rotating gear and the placement platform.

Description

Technical Field

[0001] This invention relates to the field of umbrella manufacturing equipment technology, and in particular to an umbrella bead welding device. Background Technology

[0002] In the existing umbrella manufacturing industry, the core defect of automated equipment for umbrella bead welding process is its limited adaptability. The automatic welding machines on the market are usually designed for a specific number of umbrella ribs, such as six or eight ribs. The number of stations of its rotating indexing mechanism is fixed. When producing products with different numbers of umbrella ribs, the machine must be stopped and the entire indexing plate must be replaced or the complex mechanical structure must be adjusted. It may even be necessary to replace different special molds. This process is time-consuming, labor-intensive, and cumbersome to debug, which seriously restricts production efficiency and cannot meet the flexible production needs of multiple varieties, small batches, and fast delivery. Summary of the Invention

[0003] Therefore, in view of the above problems, the present invention proposes an umbrella bead welding device.

[0004] To achieve the above objectives, the technical solution of the present invention is to provide an umbrella bead welding device, including a frame, a placement platform on the frame for placing umbrella fabric, a positioning column in the middle of the placement platform corresponding to the center of the umbrella fabric, and a welding device on the frame for welding umbrella beads onto the umbrella fabric. A rotating device for driving the placement platform to rotate intermittently is provided between the placement platform and the frame.

[0005] The rotating device includes: a support shaft mounted on a frame, the placement platform being rotatably connected to the support shaft, a rotating gear being rotatably mounted on the support shaft, a first telescopic member being mounted on the frame, a rack being mounted on the telescopic rod of the first telescopic member, the rack meshing with the rotating gear, and a one-way rotating device being provided between the rotating gear and the placement platform.

[0006] A further improvement is that the unidirectional rotation device includes: a plug block that can slide up and down on the placement platform via a sliding device, a positioning ring on the rotating gear, and positioning blocks on the positioning ring with the same spacing. One end of the positioning block is provided with a first oblique angle, the shape of the plug block matches the gap between the positioning blocks, and the plug block is provided with a second oblique angle that matches the first oblique angle.

[0007] A further improvement is that a mounting groove is provided on the second oblique angle, and a plurality of rollers are provided in the mounting groove.

[0008] A further improvement is that: the end of the positioning block without the first bevel is provided with an elastic friction layer, and the end of the insertion block without the second bevel is provided with several locking teeth.

[0009] A further improvement is that the teeth are provided with a first rounded corner, and the elastic friction layer is provided with textured grooves to reduce the contact area with the teeth when not under pressure.

[0010] A further improvement is that the elastic friction layer is provided with deformation grooves at the positions corresponding to the locking teeth.

[0011] A further improvement is that the sliding device includes: a linear slide rail located at the bottom of the placement platform, a ball bearing slider located on the linear slide rail, and the insertion block having at least two threaded holes, and the insertion block being mounted on the ball bearing slider by screws.

[0012] A further improvement is that the frame is also provided with a first support plate, the first support plate is also provided with a first mounting plate, the first mounting plate is provided with a second telescopic member, the telescopic rod of the second telescopic member is connected to a universal ball bearing, the universal ball bearing is connected to a pressure plate, and the pressure plate is provided with a clearance groove for a clearance positioning column.

[0013] A further improvement is that the welding device includes: a second support plate disposed on the frame, a second mounting plate disposed on the second support plate, a third telescopic member disposed on the second mounting plate, an ultrasonic transducer connected to the telescopic rod of the third telescopic member, and an ultrasonic welding head connected to the lower end of the ultrasonic transducer.

[0014] A further improvement is that the second support plate is also provided with a positioning plate, which has a placement groove that facilitates the placement of the ultrasonic welding head.

[0015] The advantages and beneficial effects of this invention are as follows:

[0016] With its simple structure and convenient use, it can quickly adapt to the production of umbrellas with different numbers of ribs by adjusting only the parameters of a single drive element. Its indexing angle control method is convenient. By simply adjusting the travel of the telescopic rod of the first telescopic component, the rotation angle of the placement platform can be directly and accurately controlled. For example, when producing an eight-rib umbrella, the travel is set so that the placement platform rotates 45 degrees each time. When switching to a six-rib umbrella, only the travel needs to be adjusted so that each rotation is 60 degrees. Without changing any mechanical parts, the product changeover can be completed, reducing the changeover time from several hours to a few minutes, thus improving production convenience and efficiency. Attached Figure Description

[0017] Figure 1 This is a front cross-sectional schematic diagram of an umbrella bead welding device according to the present invention;

[0018] Figure 2 This is an enlarged schematic diagram of the insertion block and positioning block of the umbrella bead welding device of the present invention;

[0019] In the diagram: 1. Frame; 2. Placement platform; 3. Positioning column; 4. Support shaft; 5. Rotating gear; 6. First telescopic component; 7. Rack; 8. Turntable bearing; 9. Rotary bearing; 10. Insertion block; 11. Positioning ring; 12. Positioning block; 13. First bevel angle; 14. Second bevel angle; 15. Roller; 16. Elastic friction layer; 17. Clamping tooth; 18. First fillet; 19. Deformation groove; 20. Linear slide rail; 21. Ball block slider; 22. First support plate; 23. First mounting plate; 24. Second telescopic component; 25. Universal ball bearing; 26. Pressure plate; 27. Clearance groove; 28. Second support plate; 29. ​​Second mounting plate; 30. Third telescopic component; 31. Ultrasonic transducer; 32. Ultrasonic welding head; 33. Positioning plate; 34. Placement groove. Detailed Implementation

[0020] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solutions of the present invention and should not be construed as limiting the scope of protection of the present invention.

[0021] like Figure 1-2 As shown, an umbrella bead welding device includes a frame 1, a placement platform 2 on the frame 1 for placing umbrella fabric, a positioning column 3 in the middle of the placement platform 2 corresponding to the center of the umbrella fabric, and a welding device on the frame 1 for welding umbrella beads onto the umbrella fabric. A rotating device for driving the placement platform 2 to rotate intermittently is provided between the placement platform 2 and the frame 1.

[0022] The rotating device includes: a support shaft 4 mounted on the frame 1, the placement platform 2 being rotatably connected to the support shaft 4, a rotating gear 5 being rotatably mounted on the support shaft 4, a first telescopic member 6 being mounted on the frame 1, a rack 7 being mounted on the telescopic rod of the first telescopic member 6, the rack 7 meshing with the rotating gear 5, and a one-way rotating device being provided between the rotating gear 5 and the placement platform 2.

[0023] The support shaft 4 is provided with a turntable bearing 8. The inner ring of the turntable bearing 8 is fixedly connected to the support shaft 4, and the outer ring of the turntable bearing 8 is fixedly connected to the placement platform 2.

[0024] The support shaft 4 is provided with a rotary bearing 9, the inner ring of the rotary bearing 9 is fixedly connected to the support shaft 4, and the outer ring of the rotary bearing 9 is fixedly connected to the rotating gear 5.

[0025] In order to adapt to various umbrella rib specifications by adjusting the parameters of a single drive element and to fundamentally prevent the worktable from reversing, this device uses the first telescopic component 6 to drive the rack 7 and the rotating gear 5 as the power source. By setting its stroke, the rotation angle is precisely controlled. The unidirectional rotation device ensures that the rotation angle is transmitted to the placement table 2 in one direction without slippage, and disengages the two during the drive return stroke to lock the placement table 2.

[0026] Furthermore, as an optional implementation, in order to construct a reliable mechanical one-way clutch, the key lies in using angled contact to achieve automatic clutch engagement and disengagement. The one-way rotation device includes: a plug block 10 that can slide up and down on the placement platform 2 via a sliding device, a positioning ring 11 on the rotating gear 5, and positioning blocks 12 on the positioning ring 11 with the same spacing. One end of the positioning block 12 is provided with a first angle 13. The shape of the plug block 10 matches the gap between the positioning blocks 12. The plug block 10 is provided with a second angle 14 that matches the first angle 13.

[0027] When the rotating gear 5 rotates to the point where the insertion block 10 is directly facing the first oblique angle 13 of the positioning block 12, the two oblique surfaces come into contact, and the resulting component force forces the insertion block 10 to slide upward along the sliding device. At this time, the drive cannot be transmitted, and the placement platform 2 remains stationary. When the rotating gear 5 continues to rotate, causing the insertion block 10 to align and fall into the groove between the two positioning blocks 12, the insertion block 10 falls, and its vertical end face engages with the non-oblique angle end of the positioning block 12. The rotational torque of the rotating gear 5 can be directly transmitted through this end face, thereby driving the placement platform 2 to rotate.

[0028] Furthermore, as an optional implementation, in order to minimize frictional resistance and wear during the upward sliding process of the plug block 10 under the action of the inclined surface, the second inclined angle 14 is provided with a mounting groove, and a plurality of rollers 15 are provided in the mounting groove;

[0029] A roller 15 is installed on the second inclined plane 14 to change the sliding friction of the inclined plane into rolling friction, making the clutch action smoother and more reliable.

[0030] Furthermore, as an optional implementation, in order to provide an efficient, reliable and flexible torque transmission path during the driving phase and reduce the frictional force when the plug-in block 10 is inserted and disengaged, an elastic friction layer 16 is provided on the end of the positioning block 12 without the first chamfer 13, and a number of locking teeth 17 are provided on the end of the plug-in block 10 without the second chamfer 14.

[0031] The elastic friction layer 16 is a rubber layer;

[0032] When the plug-in block 10 falls, the locking teeth 17 at its end press into the elastic friction layer 16 on the vertical end face of the positioning block 12. The rotational force of the rotating gear 5 is transmitted to the plug-in block 10 through the friction and deformation meshing between the positioning block 12, the elastic friction layer 16 and the locking teeth 17, thereby driving the placement platform 2. This elastic contact design increases the effective contact area and the transmitted torque, and has a buffering effect.

[0033] Furthermore, as an optional implementation, in order to protect the elastic friction layer 16 and reduce frictional loss between the two in a non-driving state or when they slide relative to each other, the tooth 17 is also provided with a first rounded corner 18, and the elastic friction layer 16 is provided with textured grooves to reduce the contact area with the tooth 17 when not under pressure.

[0034] The rounded corners at the tips of the teeth 17 help protect the elastic friction layer 16. The textured grooves on the surface of the elastic friction layer 16 reduce the actual contact area when not under pressure, thus reducing unnecessary resistance.

[0035] Furthermore, as an optional implementation, in order to enhance the local deformation capability of the elastic friction layer 16 and enable the locking teeth 17 to be embedded more deeply, the elastic friction layer 16 is also provided with deformation grooves 19 at the positions corresponding to the locking teeth 17.

[0036] The pre-designed deformation groove 19 makes the material in this area more prone to elastic deformation under pressure, thereby increasing the embedding effect of the locking teeth 17 and improving the engagement force and torque transmission capability during forward transmission.

[0037] Furthermore, as an optional implementation, to ensure that the plug-in block 10 moves smoothly and strictly in the vertical direction and to facilitate fine adjustment of its installation height, the sliding device includes: a linear slide rail 20 provided at the bottom of the placement platform 2, a ball block slider 21 provided on the linear slide rail 20, the plug-in block 10 is provided with at least two threaded holes, and the plug-in block 10 is provided on the ball block slider 21 by screws.

[0038] It adopts a high-precision linear slide rail 20 for guidance, and the position of the plug block 10 can be easily adjusted by screw connection to optimize its cooperation with the positioning block 12, and can also be replaced when damaged.

[0039] Furthermore, as an optional implementation, in order to reliably press the umbrella fabric during welding and enhance system stability by using the pressing force, the frame 1 is also provided with a first support plate 22, the first support plate 22 is also provided with a first mounting plate 23, the first mounting plate 23 is provided with a second telescopic member 24, the telescopic rod of the second telescopic member 24 is connected with a universal ball bearing 25, the universal ball bearing 25 is connected with a pressure plate 26, and the pressure plate 26 is provided with a clearance groove 27 for the clearance positioning column 3;

[0040] The second telescopic member 24 drives the pressure plate 26 to press down. The pressing force increases the friction between the umbrella fabric and the placement platform 2, which helps to prevent the umbrella fabric from shifting and indirectly improves the anti-disturbance ability of the placement platform 2 during the intermittent period. The clearance groove 27 ensures that the movement of the pressure plate 26 does not interfere with the positioning column 3, and the universal ball bearing 25 also enables the pressure plate 26 to have a rotation function.

[0041] Furthermore, as an optional implementation, in order to adopt an efficient and clean ultrasonic welding process, the welding device includes: a second support plate 28 disposed on the frame 1, a second mounting plate 29 disposed on the second support plate 28, a third telescopic member 30 disposed on the second mounting plate 29, the telescopic rod of the third telescopic member 30 being connected to an ultrasonic transducer 31, and the lower end of the ultrasonic transducer 31 being connected to an ultrasonic welding head 32.

[0042] The third telescopic component 30 drives the ultrasonic welding head 32 to complete the pressing, welding, and lifting actions, thereby achieving a firm connection between the umbrella beads and the umbrella fabric.

[0043] Furthermore, as an optional implementation, in order to accurately position the umbrella beads to be welded, the second support plate 28 is also provided with a positioning plate 33, and the positioning plate 33 is provided with a placement groove 34 that corresponds to the ultrasonic welding head 32.

[0044] The positioning plate 33 is higher than the placement platform 2. The placement groove 34 on the positioning plate 33 is used to accommodate the umbrella beads, ensuring that they can be accurately delivered to the underside of the ultrasonic welding head 32, thereby improving the accuracy and consistency of the welding position.

[0045] Working principle: During operation, the umbrella fabric is first inserted into the positioning post 3 in the middle of the placement platform 2 to complete the initial positioning. The second telescopic component 24 drives the pressure plate 26 to press down, pressing the edge of the umbrella fabric evenly onto the placement platform 2, thereby preventing the umbrella fabric and the placement platform 2 from shifting in subsequent processes.

[0046] Subsequently, the first telescopic component 6 completes one extension and retraction according to the required number of umbrella ribs. When it extends, it pushes the rack 7 to drive the rotating gear 5 to rotate. The positioning ring 11 on the rotating gear 5 rotates with it, so that when the first angle 13 of the positioning block 12 contacts the second angle 14 of the plug-in block 10, the inclined plane component force forces the plug-in block 10 to slide up and lift along the linear slide rail 20. At this time, the placement platform 2 remains stationary.

[0047] When shrinking, the rotating gear 5 reverses, and at this time the locking teeth 17 at the end of the insertion block 10 press into the elastic friction layer 16 on the vertical end face of the positioning block 12. The rotational torque of the rotating gear 5 is transmitted to the insertion block 10 through this friction engagement, driving the placement platform 2 to rotate precisely through the preset angle.

[0048] Due to the clamping force of the pressure plate 26, the placement platform 2 will not rotate randomly after rotation. Then, the third telescopic component 30 drives the ultrasonic welding head 32 to press down, accurately welding the umbrella beads in the positioning plate 33 placement groove 34 onto the umbrella fabric. After welding is completed, the third telescopic component 30 drives the welding head to reset.

[0049] Repeat the above cycle of extending, rotating, welding, and retracting until all umbrella beads on the circumference of the umbrella fabric are welded.

[0050] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The embodiments described above are merely illustrative of several implementations of the present invention, and while their descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bead welding device, characterized in that: It includes a frame, a placement platform on the frame for placing umbrella fabric, a positioning post in the middle of the placement platform corresponding to the center of the umbrella fabric, and a welding device on the frame for welding umbrella beads onto the umbrella fabric. A rotating device for driving the placement platform to rotate intermittently is provided between the placement platform and the frame. The rotating device includes: a support shaft mounted on a frame, the placement platform being rotatably connected to the support shaft, a rotating gear being rotatably mounted on the support shaft, a first telescopic member being mounted on the frame, a rack being mounted on the telescopic rod of the first telescopic member, the rack meshing with the rotating gear, and a one-way rotating device being provided between the rotating gear and the placement platform. The unidirectional rotation device includes: a plug block that can slide up and down on a placement platform via a sliding device, a positioning ring on a rotating gear, and positioning blocks on the positioning ring with the same spacing. One end of the positioning block is provided with a first oblique angle, the shape of the plug block matches the gap between the positioning blocks, and the plug block is provided with a second oblique angle that matches the first oblique angle. The second oblique angle is provided with a mounting groove, and the mounting groove is provided with a plurality of rollers; The positioning block is provided with an elastic friction layer on the end without the first oblique angle, and the plug-in block is provided with several locking teeth on the end without the second oblique angle.

2. The umbrella bead welding device according to claim 1, characterized in that: The teeth are also provided with a first rounded corner, and the elastic friction layer is provided with textured grooves to reduce the contact area with the teeth when not under pressure.

3. The umbrella bead welding device according to claim 1, characterized in that: The elastic friction layer is also provided with deformation grooves at the positions corresponding to the locking teeth.

4. The umbrella bead welding device according to claim 1, characterized in that: The sliding device includes: a linear slide rail located at the bottom of the placement platform, a ball bearing slider located on the linear slide rail, and the insertion block having at least two threaded holes. The insertion block is mounted on the ball bearing slider by screws.

5. The umbrella bead welding device according to claim 1, characterized in that: The frame is also provided with a first support plate, the first support plate is also provided with a first mounting plate, the first mounting plate is provided with a second telescopic member, the telescopic rod of the second telescopic member is connected with a universal ball bearing, the universal ball bearing is connected with a pressure plate, and the pressure plate is provided with a clearance groove for clearance positioning column.

6. The umbrella bead welding device according to claim 1, characterized in that: The welding device includes: a second support plate disposed on a frame, a second mounting plate disposed on the second support plate, a third telescopic member disposed on the second mounting plate, an ultrasonic transducer connected to the telescopic rod of the third telescopic member, and an ultrasonic welding head connected to the lower end of the ultrasonic transducer.

7. The umbrella bead welding device according to claim 6, characterized in that: The second support plate is also provided with a positioning plate, which has a placement groove that facilitates the placement of the ultrasonic welding head.

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