Vacuum cup welding device

Abstract

The vacuum cup welding device is provided with two sets of adjusting systems, on one hand, separation and reunion are achieved through a telescopic air cylinder, and a driving motor drives a separation and reunion shaft to rotate so as to drive two double-four-connecting-rod mechanisms to swing to achieve angle adjustment of a laser head; and the swing motor drives the left mounting rack rod to rotate around the fixed fluted disc so as to adjust the position of the detection point. The laser head is driven to swing through the double four-connecting-rod mechanisms, the laser head and the double four-connecting-rod mechanisms swing in a linkage mode, so that same-angle irradiation of welding infrared rays and detection infrared rays is guaranteed, the distance between the laser head and an irradiation point is kept unchanged due to the fact that the double four-connecting-rod mechanisms can automatically adjust the distance during swinging, univariate adjustment is achieved, and the welding precision is improved. Therefore, the optimal irradiation angle can be obtained; besides, the device can adjust the position of a detection point by swinging during welding and detection, and the time difference between detection and welding can be adjusted by changing the position of the detection point, so that enough solidification time is reserved for the welding position, and the detection precision is improved.

Description

Technical Field

[0001] This invention relates to welding equipment, and more particularly to a welding apparatus for thermos cups. Background Technology

[0002] A stainless steel thermos is a container that achieves its heat preservation function through a double-layer stainless steel structure combined with vacuum technology. During manufacturing, the inner and outer layers need to be welded together.

[0003] Currently, laser welding technology is generally used for welding the rim of thermos cups. Laser welding equipment on the market consists of two parts: one part clamps and rotates the inner and outer layers of the thermos cup, and the other part is a laser emitting device. The laser emitting device emits laser light at a pre-selected angle, and the welding quality is generally judged by machine vision during welding. However, machine vision is based on planar detection, and its detection accuracy is weaker than that of infrared light. Secondly, laser welding requires adjustment of the welding angle during the welding process to improve the welding quality. However, the distance of the infrared light irradiated from the outside often changes after the angle is adjusted. The change in distance affects the energy of the infrared light. This introduces two variables, making it impossible to adjust the angle to the optimal level. Summary of the Invention

[0004] The present invention addresses the problems in the prior art. The technical problem to be solved by the present invention is to provide a welding device for thermos cups.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: Thermos cup welding device, including Machine tool; A clamping and rotating device is installed on the machine base. It is used to clamp the inner and outer layers of the thermos cup and drive them to rotate. The support frame is mounted on the machine base; A fixed gear disc, which is fixed to the upright, has an external gear ring; Telescopic cylinder, which is mounted on the upright frame; The clutch shaft is rotatably connected to the output end of the telescopic cylinder and passes through the fixed gear disc; The clutch bevel gear is fixed on the clutch shaft; The drive gear is rotatably mounted on a fixed gear disk and slides with the clutch shaft through a spur spline structure. The drive motor is mounted on the upright frame, and its output end is connected to the drive gear transmission. The left mounting bracket rod is rotatably mounted on a clutch shaft or a fixed gear plate. It includes an upper rod body and a lower rod body that are rotatably engaged. The top of the rod is provided with a movable gear that meshes with the fixed gear plate. A first adjusting gear is also rotatably mounted on the rod. The left mounting bracket is mounted on the rod. The right mounting bracket rod is rotatably mounted on the clutch shaft or the fixed gear plate. It includes an upper rod body and a lower rod body that are rotatably engaged. The top of the rod is provided with a fixed gear that meshes with the fixed gear plate. A second adjusting gear is also rotatably mounted on the rod. After the clutch shaft is lowered, the clutch bevel gear meshes with the second adjusting gear and the first adjusting gear at the same time. The rod is provided with a right mounting bracket. The double four-bar linkage includes two links, which are respectively fixed on the left mounting bracket and the right mounting bracket. Each link is provided with a drive shaft, and the two drive shafts are respectively connected to the first adjusting gear and the second adjusting gear through two passive bevel gears. The swing motor is mounted on the upright frame, and its output end is connected to the left mounting frame through a gear set. A laser head, comprising two laser heads respectively mounted on a double four-bar linkage mechanism, which swing with the linkage in the four-bar linkage mechanism and remain parallel to the linkage. In use, two laser heads emit lasers to irradiate different positions on the welding ring at the mouth of the thermos cup. One is used for detection and the other for welding. During this process, the left mounting bracket is rotated by a swing motor to adjust the position of the detection point. In addition, the extension of the telescopic cylinder drives the clutch shaft to move down, thereby engaging the clutch bevel gear and two adjusting gears. Then, the drive motor drives the clutch shaft to rotate, thereby driving the double four-bar linkage to rotate. Finally, the two laser heads swing at the same amplitude and set angle. During the swing, the angle of laser injection changes, but the injection distance remains constant.

[0006] Preferably, the double four-bar linkage includes a first link, a second link, a third link, and a fourth link, all rotatably connected by a rotating shaft. The first to fourth links form a parallelogram, and the fourth link has an extension with a mounting cavity. The mounting cavity contains a fifth link, a sixth link, a seventh link, and an eighth link, all rotatably connected by a rotating shaft. The middle of the fifth link is fixed to the rotating shaft of the third and fourth links. The middle of the seventh link has a shaft that extends out of the mounting cavity and connects to the laser head. The intersection point of the laser emitted by the laser head and the first link is located on the welding ring.

[0007] Preferably, the bottom of the fixed gear disc is provided with a cylindrical body, and the clutch shaft rotates and slides with the cylindrical body.

[0008] Preferably, both the left and right mounting brackets are provided with two brackets. The upper left and right mounting brackets are rotatably engaged with the outer wall of the cylindrical body through a sleeved annular body. The annular body is provided with an annular gear, which is connected to the output end of the drive motor. The two lower brackets are provided with connecting seats, and the two are rotatably engaged with the connecting seats through the sleeved annular body. The middle of the connecting seat is provided with a through hole for the clutch shaft to pass through.

[0009] Preferably, the output end of the telescopic cylinder is provided with a downward-opening connecting sleeve, the top of the clutch shaft is provided with an annular boss and a bearing is provided on the annular boss, the annular boss is rotatably engaged with the sleeve through the bearing, and a threaded ring is threadedly connected to the inner wall of the sleeve, the threaded ring limits the annular boss to prevent it from falling off.

[0010] Preferably, the central axes of the fixed gear plate, the clutch shaft, and the clamping rotation device are collinear. Compared with the prior art, the present invention has the following advantages: The present application uses a double four-bar linkage mechanism to drive the laser head to swing, and the two swing in tandem, thereby ensuring that the welding infrared and detection infrared are irradiated at the same angle. Moreover, since the double four-bar linkage mechanism automatically adjusts the distance during swing, it ensures that the distance from the laser head to the irradiation point remains constant, realizing single-variable adjustment, thereby obtaining the optimal irradiation angle. In addition, the device can adjust the position of the detection point by swinging during welding and detection. The change in the position of the detection point can adjust the time difference between detection and welding, thereby reserving sufficient solidification time for the welding position and improving the accuracy of detection. Attached Figure Description

[0011] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are not necessarily drawn to scale.

[0012] Figure 1 This is a perspective view of the present application; Figure 2 This is the front view of the application (excluding the machine base and frame). Figure 3 This is a perspective view of the present application (excluding the machine base and frame); Figure 4 This is a perspective view of the present application (excluding the machine base and frame); Figure 5 This is a three-dimensional diagram of a double four-bar linkage. Figure 6 This is a three-dimensional diagram of a double four-bar linkage. Figure 7 This is a schematic diagram illustrating the principle of a double four-bar linkage oscillation. In the diagram: 10. Machine base; 20. Clamping and rotating device; 30. Stand; 40. Laser head; 501. Double four-bar linkage; 5010. Rotating shaft; 5011. First link; 5012. Second link; 5013. Third link; 50131. Extension; 5014. Fourth link; 5015. Fifth link; 5016. Sixth link; 5017. Seventh link; 5018. Eighth link; 5019. Shaft; 50 2. Clutch bevel gear; 503. First adjusting gear; 5031. Driven bevel gear; 504. Second adjusting gear; 505. Telescopic cylinder; 506. Clutch shaft; 507. Drive motor; 508. Drive gear; 509. Fixed gear plate; 510. Fixed gear; 511. Movable gear; 512. Left mounting bracket; 5121. Left mounting bracket; 5122. Ring gear; 513. Right mounting bracket; 514. Swing motor; 515. Connecting seat. Detailed Implementation

[0013] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0014] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures. Example

[0015] This embodiment mainly describes the title of the thermos cup welding device, as follows: like Figure 1-7 As shown, the thermos cup welding device includes 10 machines; A clamping and rotating device 20 is mounted on the machine base 10 and is used to clamp the inner and outer layers of the thermos cup and drive them to rotate; a support frame 30 is mounted on the machine base 10. The fixed gear plate 509 is fixed on the stand 30 and has an outer gear ring; Telescopic cylinder 505, which is mounted on the upright 30; The clutch shaft 506 is rotatably connected to the output end of the telescopic cylinder 505 and passes through the fixed gear plate 509; the clutch bevel gear 502 is fixed on the clutch shaft 506; The drive gear 508 is rotatably mounted on the fixed gear disk 509 and is in sliding engagement with the clutch shaft 506 through a spur spline structure; the drive motor 507 is mounted on the support frame 30 and its output end is connected to the drive gear 508 for transmission. The left mounting bracket rod 512 is rotatably mounted on the clutch shaft 506 or the fixed gear plate 509. It includes an upper rod body and a lower rod body that are rotatably engaged. The top of the rod is provided with a movable gear 511 that meshes with the fixed gear plate 509. A first adjusting gear 503 is also rotatably mounted on the rod, and a left mounting bracket is mounted on the rod. The right mounting bracket 513 is rotatably mounted on the clutch shaft 506 or the fixed gear plate 509. It includes an upper rod body and a lower rod body that are rotatably engaged. The top of the rod is provided with a fixed gear 510 that meshes with the fixed gear plate 509. A second adjusting gear 504 is also rotatably mounted on the rod. After the clutch shaft 506 is lowered, the clutch bevel gear 502 meshes with the second adjusting gear 504 and the first adjusting gear 503 at the same time. The rod is provided with a right mounting bracket. The double four-bar linkage 501 includes two links, which are respectively fixed on the left mounting bracket and the right mounting bracket. Each link is provided with a drive shaft, and the two drive shafts are respectively connected to the first adjusting gear 503 and the second adjusting gear 504 through two passive bevel gears 5031. A swing motor 514 is mounted on the upright frame 30, and its output end is driven by a gear set to engage with the left mounting frame 5121; a laser head 40 includes two laser heads respectively mounted on a double four-bar linkage 501, which swings with the linkage in the four-bar linkage and remains parallel to the linkage. In use, two laser heads 40 emit lasers to irradiate different positions of the welding ring at the mouth of the thermos cup. One is used for detection and the other for welding. During this process, the left mounting bracket 5121 is driven to rotate by the swing motor 514 to adjust the position of the detection point. In addition, the extension of the telescopic cylinder 505 drives the clutch shaft 506 to move down, thereby engaging the clutch bevel gear 502 and the two adjusting gears. Then, the drive motor 507 drives the clutch shaft 506 to rotate, thereby driving the double four-bar linkage 501 to rotate. Finally, the two laser heads 40 swing at the same amplitude and set angle. During the swing, the angle of laser injection changes, but the injection distance remains constant. The device in this solution has two adjustment systems during welding. The first is to use a telescopic cylinder 505 to disengage and drive the clutch shaft 506 to rotate via a drive motor 507, thereby causing two double four-bar linkages 501 to swing and adjust the angle of the laser head 40. The second is to use a swing motor 514 to drive the left mounting bracket 512 to rotate around the fixed gear plate 509, thereby adjusting the position of the detection point. By adjusting the above two adjustment systems, the optimal welding angle and the optimal detection point position can be found during welding, thereby improving the welding quality of the thermos cup mouth.

[0016] Preferably, the double four-bar linkage 501 includes a first link 5011, a second link 5012, a third link 5013, and a fourth link 5014 that are sequentially rotatably connected by a rotating shaft 5010. The first to fourth links enclose a parallelogram, and an extension 50131 is provided on the fourth link 5014. The extension 50131 has an installation cavity, and a fifth link 5015, a sixth link 5016, a seventh link 5017, and an eighth link 5018 that are sequentially rotatably connected by a rotating shaft 5010 are provided in the installation cavity. The middle of the fifth link 5015 is fixed to the rotating shaft 5010 of the third link 5013 and the fourth link 5014. A shaft rod 5019 is provided in the middle of the seventh link 5017, and the shaft rod 5019 extends out of the installation cavity and is connected to the laser head 40. The intersection point of the laser emitted by the laser head 40 and the first link 5011 is located on the welding circle. In this solution, the double four-bar linkage 501 forms a structure in the shape of a Chinese character 'ri' (日). Refer to Figure 7 , where the laser head 40 and the laser emitted by it are one of the side edges. When swinging, the angle of the side edge changes, but the irradiation point and the irradiation distance remain unchanged.

[0017] Preferably, a cylindrical body is provided at the bottom of the fixed gear disk 509, and the clutch shaft 506 is rotationally and slidably engaged with the cylindrical body.

[0018] Preferably, there are two left mounting brackets and two right mounting brackets. The upper left mounting bracket 5121 and the right mounting bracket are both rotationally engaged with the outer wall of the cylindrical body through a sleeved annular body. An annular gear 5122 is provided on the annular body, and the gear is drivingly connected to the output end of the driving motor. At the lower two positions, there are connection seats 515, and both are rotationally engaged with the connection seats 515 through a sleeved annular body. A central portion of the connection seat 515 is provided with a cavity for the clutch shaft 506.

[0019] Preferably, the output end of the telescopic cylinder 505 is provided with a connecting sleeve with an opening facing downwards. The top of the clutch shaft 506 is provided with an annular boss, and a bearing is provided on the annular boss. The annular boss is rotationally engaged with the sleeve through the bearing. A threaded ring is threadedly connected to the inner wall of the sleeve, and the threaded ring limits the annular boss to prevent it from falling off.

[0020] Preferably, the central axes of the fixed gear disk 509, the clutch shaft 506, the annular body, and the clamping and rotating device 20 are collinear.

[0021] In the description of this invention, it should be noted that the terms "upper," "lower," "front," "rear," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limiting this invention.

Claims

1. A thermos flask welding apparatus characterised in that, The machine table; Clamping rotating device, which is arranged on the machine table, is used for clamping the inner layer and the outer layer of the vacuum cup and driving the two to rotate; Stand, which is arranged on the machine table; Fixed gear, which is fixed on the stand, has an outer gear ring; Telescopic pneumatic cylinder, which is arranged on the stand; Clutch shaft, which is rotatably connected with the output end of the telescopic pneumatic cylinder and passes through the fixed gear; Clutch bevel gear, which is fixed on the clutch shaft; Driving gear, which is rotatably arranged on the fixed gear and is in sliding fit with the clutch shaft through straight tooth spline structure; Driving motor, which is arranged on the stand, and the output end is in transmission connection with the driving gear; Left mounting frame rod, which is rotatably arranged on the clutch shaft or the fixed gear, includes upper rod body and lower rod body in rotary fit, the top is provided with a movable gear meshing with the fixed gear, and a first adjusting gear is further rotatably arranged on the top, and the left mounting frame is arranged on the top; Right mounting frame rod, which is rotatably arranged on the clutch shaft or the fixed gear, includes upper rod body and lower rod body in rotary fit, the top is provided with a fixed gear meshing with the fixed gear, and a second adjusting gear is further rotatably arranged on the top, the clutch bevel gear is in meshing with the second adjusting gear and the first adjusting gear at the same time after the clutch shaft is lowered, and the right mounting frame is arranged on the top; Double four-bar linkage mechanism, which includes two and is respectively fixed on the left mounting frame and the right mounting frame, and each is provided with a driving shaft and the two driving shafts are in meshing with the first adjusting gear and the second adjusting gear through two passive bevel gears respectively; Swing motor, which is arranged on the stand, and the output end is in transmission fit with the left mounting frame through a gear set; Laser head, which includes two and is respectively arranged on the double four-bar linkage mechanism and swings with the connecting rod in the four-bar linkage mechanism and keeps parallel with the connecting rod; In use, the two laser heads emit laser to irradiate on different positions of the vacuum cup cup mouth welding ring, one of which is used for detection and the other is used for welding, in the process, the position of the detection point is adjusted by driving the left mounting frame to rotate through the swing motor, in addition, the clutch bevel gear and the two adjusting gears are meshed by driving the clutch shaft to descend through the telescopic pneumatic cylinder, then the double four-bar linkage mechanism is driven to rotate by driving the clutch shaft to rotate through the driving motor, finally the two laser heads are swung with the same amplitude and set angle, the angle of the laser irradiation changes when the laser is swung, and the irradiation distance remains unchanged. The double four-bar linkage mechanism includes first connecting rod, second connecting rod, third connecting rod and fourth connecting rod which are sequentially rotatably connected through rotating shafts, the first to fourth connecting rods form a parallelogram, and the fourth connecting rod is provided with an extension, the extension has a mounting cavity, the mounting cavity is provided with fifth connecting rod, sixth connecting rod, seventh connecting rod and eighth connecting rod which are sequentially rotatably connected through rotating shafts, the fifth connecting rod is fixed to the rotating shafts of the third connecting rod and the fourth connecting rod in the middle, the seventh connecting rod is provided with a shaft rod in the middle, the shaft rod extends out of the mounting cavity and is connected with the laser head; wherein the intersection of the laser emitted by the laser head and the first connecting rod is located on the welding ring.

2. The thermos cup welding device according to claim 1, characterized in that, The bottom of the fixed gear is provided with a cylindrical body, and the clutch shaft is in rotatable and sliding fit with the cylindrical body.

3. The thermos cup welding device according to claim 1, wherein, ​ 4. The thermos cup welding device according to claim 3, characterized in that, There are two mounting brackets on both the left and right sides. The upper left and right mounting brackets are rotatably engaged with the outer wall of the cylindrical body through a sleeved annular body. The annular body is equipped with an annular gear, which is connected to the output end of the drive motor. The two lower brackets are equipped with connecting seats, and the two are rotatably engaged with the connecting seats through the sleeved annular body. The middle of the connecting seat is provided with a through hole for the clutch shaft to pass through.

5. The thermos cup welding device according to claim 1, wherein, The output end of the telescopic cylinder is provided with a downward-opening connecting sleeve. The top of the clutch shaft is provided with an annular boss and a bearing is provided on the annular boss. The annular boss is rotatably engaged with the sleeve through the bearing. A threaded ring is threadedly connected to the inner wall of the sleeve. The threaded ring limits the annular boss to prevent it from falling off.

6. The thermos cup welding device according to claim 1, wherein, The central axes of the fixed gear plate, clutch shaft, and clamping rotation device are collinear.

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