Vacuum cup welding machine with coaxial pressing and inner supporting device

Abstract

The utility model belongs to the technical field of vacuum cup welding, and particularly relates to a vacuum cup welding machine with a coaxial downward-pressing inner supporting device, which comprises a rack and a sliding frame arranged on the rack in a sliding mode. The adjusting device is mounted at the upper end of the rack and used for driving the sliding frame to slide up and down; the coaxial pressing inner supporting device is mounted on the sliding frame; a bottom die device and a welding device; the coaxial downward-pressing inner supporting device at least comprises a downward-pressing device which is installed on the sliding frame and used for abutting against the upper opening of the cup body; the inner supporting device is mounted on the sliding frame and is used for supporting and fixing the cup body; the rotating device is installed on the sliding frame and used for driving the cup body on the inner supporting device to rotate; the axis of the driving shaft of the first driving piece of the downward pressing device coincides with the axis of the pull rod of the inner supporting device, it is guaranteed that the force of the downward pressing device abutting against the opening in the cup body can be evenly distributed, the flatness of the cup body and the cup bottom after welding is improved, and the reject ratio of products is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of thermos cup welding, in particular to a thermos cup welding machine with a coaxial downward pressing inner supporting device. Background Art

[0002] Thermos cups are generally made of ceramic or stainless steel with a vacuum layer to hold water, with a lid on the top and a tight seal. In the production process of stainless steel thermos cups, the bottom of the cup needs to be welded to the bottom of the cup body. For example, Chinese patent CN217571314U discloses a straight bottom cup body welding machine, which includes a welding laser gun, a cup bottom positioning piece and a cup mouth fixing piece. The cup mouth fixing piece is equipped with a cup mouth positioning piece, and the cup mouth positioning piece is connected to a driver, which is a linear cylinder or oil cylinder or a linear motor or an electric push rod.

[0003] However, there are still some shortcomings: drivers are provided on both sides of the upper end of the cup mouth positioning piece, and the drivers simultaneously drive the cup mouth positioning piece to abut against the cup mouth of the cup body. Due to the uneven air pressure of the driver itself and the uneven lubrication of the piston, the actions of the drivers on both sides of the upper end of the cup mouth positioning piece will be delayed or inconsistent, which may cause the downward pressure on the cup body to be uneven on the left and right, affecting the flatness of the cup body and the cup bottom after welding. Utility Model Content

[0004] The purpose of the utility model is to provide a thermos cup welding machine with a coaxial downward-pressing inner-supporting device, by coinciding the axis of the driving shaft of a driving member of the downward-pressing device with the axis of the pull rod of the inner-supporting device, so that the force of the downward-pressing device pressing against the opening of the cup body can be evenly distributed on the upper opening of the cup body, thereby improving the problem of unevenness between the cup body and the cup bottom after welding.

[0005] The purpose of the utility model is achieved in this way:

[0006] A thermos cup welding machine with a coaxial downward pressing inner supporting device, comprising:

[0007] frame,

[0008] A sliding frame, which is slidably mounted on the frame;

[0009] An adjusting device, which is installed at the upper end of the frame and is used to drive the sliding frame to slide up and down;

[0010] A coaxial downward pressing inner support device, which is installed on the sliding frame;

[0011] A bottom mold device, which is installed on the frame and located below the coaxial downward pressure inner support device, and a welding position is provided on the bottom mold device;

[0012] A welding device, which is arranged at the side end of the bottom mold device and is used to perform bottom welding operation on the cup body in the welding position;

[0013] Wherein, the coaxial downward pressing inner supporting device at least comprises:

[0014] A pressing device, which is installed on the sliding frame and is used to press the upper opening of the cup body;

[0015] An inner support device, which is installed on the sliding frame and is used to fix the inner support of the cup body pressed by the pressing device;

[0016] A rotating device, which is installed on the sliding frame and is used to drive the cup body fixed by the inner support device to rotate;

[0017] The axis of the driving shaft of the driving member 1 of the pressing device coincides with the axis of the pull rod of the inner supporting device.

[0018] Preferably, the welding position of the bottom mold device and the center point of the bottom mold seat are located on the axis of the pull rod.

[0019] Preferably, the inner support device comprises:

[0020] A pull rod, which is mounted on the sliding frame, and the lower end of the pull rod passes through the driving member 1 of the pressing device, and the lower end of the pull rod is provided with an expansion member;

[0021] A spring clip is rotatably mounted on the sliding frame and sleeved on the outside of the pull rod, and the lower end of the spring clip has a plurality of claw-shaped parts.

[0022] A second driving member, which is mounted on the upper end of the sliding frame and movably connected to the pull rod;

[0023] When the lower end of the spring clip extends into the cup body, the second driving member drives the pull rod to move upward, and the expansion member causes the claw-shaped portion to abut against the inner wall of the cup body, thereby fixing the cup body.

[0024] Preferably, the pressing device comprises:

[0025] A lower pressing frame, which is slidably arranged on the sliding frame through a guide column;

[0026] A pressing plate, which is movably connected to the lower end of the lower pressing frame;

[0027] A driving member 1, which is mounted on the sliding frame and is provided with a driving shaft, and the driving shaft is connected to the upper end of the lower pressing frame;

[0028] The lower end of the pull rod of the inner support device passes through the driving shaft of the driving member 1;

[0029] The lower pressing frame is driven downward by the driving member 1, so that the lower end of the pressing plate abuts against the upper opening of the cup body.

[0030] Preferably, the lower end of the lower press frame has a plurality of vertically distributed adjustment holes, the pressure plate is provided with a connecting hole, a fixing piece is provided in the connecting hole, and the fixing piece is movably connected with the adjustment holes at different positions to achieve the adjustment of the position of the pressure plate on the lower press frame.

[0031] Preferably, the rotating device comprises:

[0032] A rotating shaft, which is sleeved on the pull rod and rotatably connected to the sliding frame, and the lower end of the rotating shaft is movably connected to the spring clip;

[0033] A driving member 3 is mounted on the sliding frame, and a driving end of the driving member 3 is movably connected to the upper end of the rotating shaft, so as to drive the rotating shaft to rotate;

[0034] A connecting seat is movably connected to the sliding frame, and the connecting seat is sleeved on the rotating shaft to limit the upward and downward movement of the rotating shaft on the sliding frame.

[0035] Preferably, several bearings are arranged between the connecting seat and the rotating shaft; the upper end of the rotating shaft has a limiting boss, and the lower end is sleeved with a limiting member; the lower end of the connecting seat is provided with a limiting convex ring, the limiting member and the limiting convex ring abut the lower end of the bearing, and the limiting boss abuts the upper end of the bearing, so that the rotating shaft is rotatably installed in the connecting seat.

[0036] Preferably, the bottom mold device comprises:

[0037] A guide plate mounted on the frame;

[0038] A driving member 4 is mounted at the lower end of the frame, and the driving member 4 is placed below the guide plate;

[0039] A bottom die seat, which is mounted on the driving end of the driving member 4, the upper end surface of the bottom die seat is provided with a limiting groove, the center point of the limiting groove is located on the axis of the pull rod of the inner support device;

[0040] When the driving member 4 and the bottom mold base move downward, the welding position is formed between the bottom mold base and the guide plate.

[0041] Preferably, the adjusting device comprises:

[0042] A screw rod is rotatably disposed on the frame and is threadably connected to the sliding frame;

[0043] A motor, which is mounted on the upper end of the frame, and a driving end of the motor is movably connected to the screw rod;

[0044] The frame is vertically provided with a guide column, and the sliding frame is slidably connected to the guide column;

[0045] When the motor drives the screw rod to rotate on the frame, the sliding frame slides on the guide column, thereby coaxially pressing the inner support device down to approach the upper end of the cup body.

[0046] Preferably, the driving end of the second driving member is connected with a linkage mechanism, and the linkage mechanism comprises:

[0047] A connecting sleeve, the upper end of which is movably connected to the driving end of the second driving member;

[0048] A linkage member, which is rotatably disposed in the connecting sleeve, and the lower end of the linkage member is movably connected to the upper end of the pull rod;

[0049] A second bearing, which is arranged between the linkage member and the connecting sleeve;

[0050] When the spring clip rotates, the pull rod is rotated.

[0051] Compared with the prior art, the utility model has the following outstanding and beneficial technical effects:

[0052] The utility model makes the axis of the driving shaft of the driving member of the pressing device coincide with the axis of the pull rod of the inner supporting device, so that the downward pressure of the pressing device can be concentrated on the axis of the pull rod, ensuring that the force of the pressing device pressing against the opening of the cup body can be evenly distributed, so that the cup bottom on the bottom mold device can be placed inside the lower end of the cup body and abut against the inner wall of the lower end of the cup body, and the connection between the cup body and the cup bottom is welded together by a welding device, thereby improving the flatness of the cup body and the cup bottom after welding and reducing the defective rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 It is a structural schematic diagram of the utility model.

[0054] Figure 2 It is a cross-sectional view of the utility model.

[0055] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0056] Figure 4 for Figure 2 Enlarged view of point B in the middle.

[0057] Figure 5 It is a cross-sectional view of the cup body and cup bottom of the utility model.

[0058] Reference numerals: 1, frame; 11, sliding frame; 12, guide column; 2, pressing device; 21, pressing frame; 211, guide column; 212, adjusting hole; 22, pressing plate; 221, connecting hole; 23, driving member 1; 231, driving shaft; 3, inner support device; 31, pull rod; 311, expansion member; 32, spring clip; 321, claw-shaped portion; 33, driving member 2; 4, rotating device; 41, rotating shaft; 411, limiting boss; 41 2. Limiting member; 42. Driving member three; 43. Connecting seat; 431. Limiting convex ring; 44. Bearing one; 5. Bottom die device; 51. Guide plate; 52. Driving member four; 53. Bottom die seat; 531. Limiting groove; 54. Welding position; 6. Welding device; 7. Adjusting device; 71. Screw rod; 72. Motor; 8. Linkage mechanism; 81. Connecting sleeve; 82. Linkage member; 83. Bearing two; 91. Cup body; 92. Cup bottom; 93. Welding seam. DETAILED DESCRIPTION

[0059] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0060] Combination Figure 1 to Figure 2 A thermos cup welding machine with a coaxial downward pressure inner support device comprises: a frame 1, a sliding frame 11, which is slidably mounted on the frame 1; an adjusting device 7, which is mounted on the upper end of the frame 1 and is used to drive the sliding frame 11 to slide up and down; a coaxial downward pressure inner support device, which is mounted on the sliding frame 11; a bottom mold device 5, which is mounted on the frame 1 and is located below the coaxial downward pressure inner support device, and a welding position 54 is provided on the bottom mold device 5; a welding device 6, which is arranged at the side end of the bottom mold device 5, and is used to perform bottom welding operation on the cup body in the welding position 54; wherein, The coaxial downward-pressing inner-supporting device comprises at least: a downward-pressing device 2, which is mounted on the sliding frame 11 and is used to press against the upper opening of the cup body; an inner-supporting device 3, which is mounted on the sliding frame 11 and is used to fix the inner support of the cup body pressed by the downward-pressing device 2; a rotating device 4, which is mounted on the sliding frame 11 and is used to drive the cup body fixed by the inner support on the inner-supporting device 3 to rotate, and the rotating device 4 realizes the rotation of the cup body by driving the spring clip 32 of the inner-supporting device 3 to rotate; the axis of the driving shaft 231 of the driving member 23 of the downward-pressing device 2 coincides with the axis of the pull rod 31 of the inner-supporting device 3.

[0061] like Figure 2 As shown, the welding position 54 of the bottom mold device 5 and the center point of the bottom mold base 53 are located on the axis of the pull rod 31, the cup bottom is placed in the limiting groove 531 of the bottom mold base 53, and the center point of the limiting groove 531 and the center point of the cup bottom are both located on the axis of the pull rod 31.

[0062] Combination Figure 2 and Figure 3The inner support device 3 includes: a pull rod 31, which is installed on the sliding frame 11, and the lower end of the pull rod 31 passes through the driving member 23 of the pressing device 2, and an expansion member 311 is arranged at the lower end of the pull rod 31, and a nut is connected to the lower end of the pull rod 31, and the nut abuts the lower end of the expansion member 311 to limit the separation of the expansion member 311 and the pull rod 31; a spring clip 32, which is rotatably installed on the sliding frame 11 and sleeved on the outside of the pull rod 31, and the lower end of the spring clip 32 has a plurality of claw-shaped portions 321, and a driving member 33, which is installed at the upper end of the sliding frame 11 and movably connected to the pull rod 31; when the lower end of the spring clip 32 extends into the cup body, the driving member 33 drives the pull rod 31 to move upward, and the expansion member 311 is placed inside the lower end of the spring clip 32, and the expansion member 311 makes the claw-shaped portion 321 abut against the inner wall of the cup body to fix the cup body.

[0063] The inner side wall of the claw-shaped portion 321 has an inclined guide surface 1, and the upper end of the expansion piece 311 has an inclined guide surface 2. The guide surface 2 slides on the guide surface 1, so that the expansion piece 311 extends into the lower end of the spring clip 32, thereby increasing the distance between the claw-shaped portions 321, and finally making the outer side of the claw-shaped portion 321 abut against the inner side wall of the cup body.

[0064] Combination Figure 2 and Figure 3 The pressing device 2 includes: a pressing frame 21, which is provided with guide columns 211 on both sides, and the pressing frame 21 is slidably arranged on the sliding frame 11 through the guide columns 211; a pressing plate 22, which is movably connected to the lower end of the pressing frame 21, a driving member 23, which is installed on the sliding frame 11, and the driving member 23 is provided with a driving shaft 231, and the driving shaft 231 is connected to the upper end of the pressing frame 21; the lower end of the pull rod 31 of the inner support device 3 passes through the driving shaft 231 of the driving member 23, and the pull rod 31 can be moved on the driving shaft 231 moves up and down; the lower pressure frame 21 is driven downward by a driving member 23, so that the lower end of the pressure plate 22 abuts against the upper opening of the cup body, and the force of the driving member 23 driving the lower pressure frame 21 is located on the axis of the pull rod 31, and the axis of the pull rod 31 coincides with the axis of the cup body and the bottom of the cup. The force of the pressure plate 22 moving downward can be evenly distributed in the upper opening of the cup body, so that the bottom of the cup is placed inside the lower end of the cup body and abuts against the inner wall of the lower end of the cup body, and the bottom of the cup can stably abut against the lower edge of the cup body, thereby improving the flatness of the lower end of the cup body after welding.

[0065] The driving member 1 23 and the driving member 2 33 are both linear cylinders, and can also be standard linear motion parts such as oil cylinders, linear motors, or electric push rods.

[0066] like Figure 3The lower end of the guide column 211 of the lower press frame 21 has a plurality of vertically distributed adjustment holes 212, and the left and right ends of the press plate 22 are provided with connecting holes 221. The connecting holes 221 are provided with fixing parts, which are screws, bolts or cylinders. The fixing parts are movably connected with the adjustment holes 212 at different positions to achieve the adjustment of the position of the press plate 22 on the lower press frame 21.

[0067] Combination Figures 1 to 3 The rotating device 4 includes: a rotating shaft 41, which is sleeved on the pull rod 31 and rotatably connected to the sliding frame 11, and the lower end of the rotating shaft 41 is clamped with a spring clip 32; a driving member 42, which is a motor or a rotary cylinder. The driving member 42 is installed on the sliding frame 11, and the driving end of the driving member 42 is movably connected to the upper end of the rotating shaft 41, which is used to drive the rotating shaft 41 to rotate; a connecting seat 43, which is movably connected to the sliding frame 11 through a screw, and the connecting seat 43 is sleeved on the rotating shaft 41, and is used to limit the up and down movement of the rotating shaft 41 on the sliding frame 11.

[0068] The driving end of the driving member 3 42 is connected to a driving wheel (the surface of the driving wheel has protrusions distributed around the circumference) arranged at the upper end of the rotating shaft 41 through a transmission belt (belt or rubber belt) or a gear set to drive the rotating shaft 41 to rotate.

[0069] Combination Figure 2 and Figure 3 A plurality of bearings 44 are arranged between the connecting seat 43 and the rotating shaft 41; a limiting boss 411 is provided at the upper end of the rotating shaft 41, and a limiting member 412 is sleeved at the lower end; the upper end of the connecting seat 43 has a convex edge, and a limiting convex ring 431 is provided at the lower end of the connecting seat 43; the limiting member 412 and the limiting convex ring 431 abut against the lower end of the bearing 44, and the limiting boss 411 and the convex edge abut against the upper end of the bearing 44, so that the rotating shaft 41 is rotatably installed in the connecting seat 43 and the rotating shaft 41 is prevented from moving up and down in the connecting seat 43.

[0070] In this solution, there are two bearings 44 , which are distributed at the upper and lower ends of the connecting seat 43 . A bearing pad is provided between the two bearings 44 , and the bearing pad is rotatably installed in the connecting seat 43 .

[0071] Combination Figure 2 and Figure 4The bottom mold device 5 includes: a guide plate 51, which is installed on the frame 1, and the guide plate 51 is used to guide the cup bottom to the limiting groove 531 of the bottom mold seat 53; a driving member 52, which is installed at the lower end of the frame 1, and the driving member 52 is placed below the guide plate 51; a bottom mold seat 53, which is installed on the driving end of the driving member 52, and the upper end surface of the bottom mold seat 53 is provided with a limiting groove 531, and the center point of the limiting groove 531 is located on the axis of the pull rod 31 of the inner support device 3; when the driving member 52 and the bottom mold seat 53 move downward, a welding position 54 is formed between the bottom mold seat 53 and the guide plate 51.

[0072] The driving member 4 52 in this scheme adopts a motor to drive the transmission screw to rotate, the upper end of the transmission screw is threadedly connected with a conversion sleeve, the upper end of the conversion sleeve is connected to a driving rod, and the upper end of the driving rod is connected to the bottom mold base 53. The driving member 4 52 can also be directly connected to the lower end of the bottom mold base 53 by using standard parts of linear motion such as linear cylinders or oil cylinders or linear motors or electric push rods.

[0073] Combination Figure 1 and Figure 2 The adjusting device 7 includes: a screw rod 71, which is rotatably arranged on the frame 1, and the screw rod 71 is threadedly connected to the sliding frame 11; a motor 72, which is installed at the upper end of the frame 1, and the driving end of the motor 72 is movably connected to the screw rod 71; the frame 1 is vertically provided with a guide column 12, and the sliding frame 11 is slidably connected to the guide column 12; when the motor 72 drives the screw rod 71 to rotate on the frame 1, the sliding frame 11 slides on the guide column 12, thereby realizing the coaxial downward pressure of the inner support device close to the upper end of the cup body.

[0074] The motor 72 is connected to one side of the upper end of the frame 1 in this scheme, and the motor 72 is connected to a driving wheel at the lower end, and the driving wheel is connected to a screw rod 71 on one side of the frame 1. The other side of the upper end of the frame 1 is connected to a driven wheel, and the driven wheel is connected to the driving wheel through a transmission belt. The lower end of the driven wheel is connected to the screw rod 71 on the other side of the frame 1. The screw rods 71 ​​on both sides of the frame 1 are driven to rotate by the motor 72, so that both ends of the sliding frame 11 move up and down at the same time.

[0075] like Figure 3 The driving end of the second driving member 33 is connected with a linkage mechanism 8, and the linkage mechanism 8 includes: a connecting sleeve 81, whose upper end is movably connected to the driving end of the second driving member 33; a linkage member 82, which is rotatably arranged in the connecting sleeve 81, and the lower end of the linkage member 82 is movably connected to the upper end of the pull rod 31; a second bearing 83, which is arranged between the linkage member 82 and the connecting sleeve 81; when the spring clip 32 rotates, the spring clip 32 abuts against the expansion member 311 at the lower end of the pull rod 31, so that the pull rod 31 rotates with the spring clip 32, and the linkage mechanism 8 prevents the pull rod 31 from rotating and causing a loose connection with the driving member 33.

[0076] The welding device 6 has a welding gun and an adjustment frame assembly, which is arranged on the frame 1. The adjustment frame assembly includes a transverse guide rail and a vertical guide rail. The vertical guide rail is arranged on a slider of the transverse guide rail. The welding gun is installed on the slider of the vertical guide rail. A mounting plate is arranged on the slider of the vertical guide rail. The front end of the mounting plate has a curved strip hole, and the welding gun is connected to the strip hole by screws or bolts.

[0077] like Figure 5 As shown, the cup bottom 92 is placed at the lower end of the inner wall of the cup body 91 , and the welding seam 93 is located between the cup bottom 92 and the lower end of the cup bottom 92 .

[0078] The specific working process of this scheme is as follows: first, slide the cup bottom 92 into the limiting groove 531 of the bottom mold seat 53 through the guide plate 51, and then put the cup body 91 into the guide plate 51. The adjusting device 7 adjusts the coaxial downward pressure and internal support device to the upper opening of the cup body 91. The downward pressure device 2 uses the pressure plate 22 of the downward pressure frame 21 to cover the cup body 91 outside the cup bottom 92. The internal support device 3 extends into and abuts against the inner wall of the cup body 91 through the claw-shaped portion 321 of the spring clip 32. The bottom mold device 5 uses the driving member 52 to move the bottom mold seat 53 downward and separate it from the lower end of the cup body 91 and the cup bottom 92. The rotating device 4 drives the spring clip 32 to rotate through the rotating shaft 41, thereby driving the cup body 91 to rotate. The welding device 6 performs welding operations on the connection between the cup body 91 and the bottom of the cup bottom 92.

[0079] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A thermos cup welding machine with a coaxial downward pressure inner support device, characterized in that: include: Rack(1), A sliding frame (11) slidably mounted on the frame (1); An adjusting device (7) mounted on the upper end of the frame (1) and used for driving the sliding frame (11) to slide up and down; A coaxial downward pressing inner support device, which is mounted on the sliding frame (11); A bottom mold device (5) is mounted on the frame (1) and is located below the coaxial downward pressure inner support device, and a welding position (54) is provided on the bottom mold device (5); A welding device (6), which is arranged at the side end of the bottom mold device (5) and is used to perform bottom welding operation on the cup body in the welding position (54); Wherein, the coaxial downward pressing inner supporting device at least comprises: A pressing device (2), which is mounted on the sliding frame (11) and is used to press against the upper opening of the cup body; An inner support device (3) is mounted on the sliding frame (11) and is used to fix the inner support of the cup body pressed by the pressing device (2); A rotating device (4) is mounted on the sliding frame (11) and is used to drive the cup body fixed by the inner support device (3) to rotate; The axis of the driving shaft (231) of the driving member 1 (23) of the pressing device (2) coincides with the axis of the pulling rod (31) of the inner supporting device (3).

2. A thermos cup welding machine with a coaxial downward pressure inner support device according to claim 1, characterized in that: The welding position (54) of the bottom mold device (5) and the center point of the bottom mold base (53) are located on the axis of the pull rod (31).

3. The thermos cup welding machine with a coaxial downward pressure inner support device according to claim 2, characterized in that: The inner support device (3) comprises: A pull rod (31) is mounted on the sliding frame (11), and the lower end of the pull rod (31) passes through a driving member (23) of the pressing device (2), and a support member (311) is provided at the lower end of the pull rod (31); A spring clip (32) is rotatably mounted on the sliding frame (11) and sleeved on the outside of the pull rod (31), and the lower end of the spring clip (32) has a plurality of claw-shaped portions (321). A second driving member (33), which is mounted on the upper end of the sliding frame (11) and is movably connected to the pull rod (31); When the lower end of the spring clip (32) extends into the cup body, the second driving member (33) drives the pull rod (31) to move upward, and the expansion member (311) causes the claw-shaped portion (321) to abut against the inner wall of the cup body, thereby fixing the cup body.

4. The thermos cup welding machine with a coaxial downward pressure inner support device according to claim 2, characterized in that: The pressing device (2) comprises: A lower pressing frame (21) which is slidably arranged on the sliding frame (11) via a guide column (211); A pressing plate (22) movably connected to the lower end of the lower pressing frame (21); A driving member (23) is mounted on the sliding frame (11), and the driving member (23) is provided with a driving shaft (231), and the driving shaft (231) is connected to the upper end of the lower pressing frame (21); The lower end of the pull rod (31) of the inner support device (3) passes through the drive shaft (231) of the driving member 1 (23); The lower pressing frame (21) is driven downward by a driving member (23) so that the lower end of the pressing plate (22) abuts against the upper opening of the cup body.

5. The thermos cup welding machine with a coaxial downward pressure inner support device according to claim 3, characterized in that: The rotating device (4) comprises: A rotating shaft (41) is sleeved on the pull rod (31) and rotatably connected to the sliding frame (11), and the lower end of the rotating shaft (41) is movably connected to the spring clip (32); A driving member 3 (42) is mounted on the sliding frame (11), and a driving end of the driving member 3 (42) is movably connected to the upper end of the rotating shaft (41) for driving the rotating shaft (41) to rotate; A connecting seat (43) is movably connected to the sliding frame (11), and the connecting seat (43) is sleeved on the rotating shaft (41) to limit the upward and downward movement of the rotating shaft (41) on the sliding frame (11).

6. The thermos cup welding machine with a coaxial downward pressing inner support device according to claim 5, characterized in that: A plurality of bearings (44) are arranged between the connecting seat (43) and the rotating shaft (41); the upper end of the rotating shaft (41) is provided with a limiting boss (411), and the lower end is sleeved with a limiting member (412); a limiting convex ring (431) is arranged at the lower end of the connecting seat (43); the limiting member (412) and the limiting convex ring (431) abut against the lower end of the bearing (44), and the limiting boss (411) abuts against the upper end of the bearing (44), so that the rotating shaft (41) is rotatably installed in the connecting seat (43).

7. The thermos cup welding machine with a coaxial downward pressing inner support device according to claim 6, characterized in that: The driving end of the second driving member (33) is connected to a linkage mechanism (8), and the linkage mechanism (8) comprises: A connecting sleeve (81), the upper end of which is movably connected to the driving end of the second driving member (33); A linkage member (82) is rotatably disposed in the connecting sleeve (81), and the lower end of the linkage member (82) is movably connected to the upper end of the pull rod (31); A second bearing (83) disposed between the linkage member (82) and the connecting sleeve (81); When the spring clip (32) rotates, the pull rod (31) is rotated.

8. The thermos cup welding machine with a coaxial downward pressing inner support device according to claim 4, characterized in that: The lower end of the lower pressing frame (21) has a plurality of vertically distributed adjustment holes (212), and the pressing plate (22) is provided with a connecting hole (221). A fixing piece is provided in the connecting hole (221), and the fixing piece is movably connected with the adjustment holes (212) at different positions to achieve adjustment of the position of the pressing plate (22) on the lower pressing frame (21).

9. A thermos cup welding machine with a coaxial downward pressing inner supporting device according to claim 3 or 4, characterized in that: The bottom mold device (5) comprises: A guide plate (51) mounted on the frame (1); A driving member four (52) mounted at the lower end of the frame (1), and the driving member four (52) is placed below the guide plate (51); A bottom mold base (53) is mounted on the driving end of the driving member 4 (52), and a limiting groove (531) is provided on the upper end surface of the bottom mold base (53), and the center point of the limiting groove (531) is located on the axis of the pull rod (31) of the inner support device (3); When the driving member 4 (52) moves the bottom mold base (53) downward, the welding position (54) is formed between the bottom mold base (53) and the guide plate (51).

10. The thermos cup welding machine with a coaxial downward pressing inner support device according to claim 9, characterized in that: The regulating device (7) comprises: A screw rod (71) is rotatably arranged on the frame (1), and the screw rod (71) is threadedly connected to the sliding frame (11); A motor (72) is mounted on the upper end of the frame (1), and a driving end of the motor (72) is movably connected to the screw rod (71); The frame (1) is vertically provided with a guide column (12), and the sliding frame (11) is slidably connected to the guide column (12); When the motor (72) drives the screw rod (71) to rotate on the frame (1), the sliding frame (11) slides on the guide column (12), thereby coaxially pressing the inner support device down to approach the upper end of the cup body.

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