A welding assembly for a baler and a baler

Abstract

The utility model discloses a kind of welding assembly and packing machine of packing machine, belong to packing machine technical field, including briquetting, third elastic member, support shaft, guide column and welding upper tooth, third elastic member compression sleeve is packed in the lower end of briquetting, one end of support shaft is fixed in the lower end of briquetting, briquetting is arranged in guide column, guide column and welding upper tooth are fixedly connected. Chamber is equipped in welding upper tooth, the position change of support shaft in chamber during welding process. The upper end of briquetting is equipped with gyro wheel, gyro wheel and the briquetting of handle place abut, first recess and second recess are equipped on briquetting, the abutment point of gyro wheel and briquetting switches between first recess and second recess. The welding assembly of the packing machine of the utility model can exert sustained stable compacting force, and welding effect is good, convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of packaging machine technology, and in particular to a welding component for a packaging machine and a packaging machine. Background Technology

[0002] Packing machines, also known as strapping machines or bundling machines, are portable and highly efficient. They are easy to carry and are widely used in various industries for packing and bundling goods of all sizes. When packing goods, the goods are usually placed in a packing box. The packing is completed by tightening the strapping loops that wrap around the packaged items and fixing the overlapping parts of the strapping by friction welding.

[0003] In the existing technology, when the welding component of the strapping machine is in the initial state of welding, the sliding tooth block can fit tightly with the strapping tape and apply a certain pressure to the strapping tape. However, during the welding process, the strapping tape will become soft and thinner due to friction heating. Since the lower pressing surface of the sliding tooth block is not always horizontal, the pressure applied by the sliding tooth block to the strapping tape is uneven, which affects the welding effect. Utility Model Content

[0004] The present invention aims to provide a welding component for a packing machine and a packing machine, so as to ensure that the welding component can apply a continuous and stable clamping force to the packing strap during the welding process, thereby optimizing the welding effect.

[0005] To achieve the above objectives, the present invention provides a welding assembly for a packaging machine, comprising a pressure block, a third elastic element, a support shaft, a guide post, and welding upper teeth. The third elastic element is fitted onto the lower end of the pressure block. One end of the support shaft is fixed to the pressure block, and the other end of the support shaft faces the welding upper teeth. The pressure block passes through the guide post, and the guide post and the welding upper teeth are fixedly connected.

[0006] In a preferred embodiment of this utility model, the upper welding tooth is provided with a cavity, and the other end of the support shaft is located in the cavity. During the welding process, the position of the support shaft in the cavity changes.

[0007] In a preferred embodiment of this utility model, the welding upper tooth includes a ball seat, a sliding tooth block, and balls. The ball seat is fixedly connected to the guide post, the sliding tooth block is installed in the ball seat, and a plurality of balls are provided between the ball seat and the sliding tooth block. The driving component drives the sliding tooth block to reciprocate horizontally.

[0008] In a preferred embodiment of the present invention, the cavity extends through the ball bearing seat and to the sliding tooth block.

[0009] In a preferred embodiment of the present invention, a second pin and a roller are further included, wherein the second pin passes through the upper end of the pressure block and the roller is fitted onto the second pin.

[0010] In a preferred embodiment of the present invention, a lower welding tooth is further included, which is located below the upper welding tooth.

[0011] This utility model also provides a packing machine, including any of the packing machine welding components described above. The packing machine includes a mounting plate and an operating component. The operating component is mounted on the mounting plate and includes a rotating shaft, a button, and a pressure plate. The rotating shaft passes through the mounting plate, and one end of the rotating shaft is fitted with the button and the pressure plate. The button and the pressure plate are fixedly connected.

[0012] In a preferred embodiment of this utility model, the pressure plate abuts against the roller, and the pressure plate is provided with a first recess and a second recess. When the pressure plate rotates, the contact point between the roller and the pressure plate switches between the first recess and the second recess.

[0013] In a preferred embodiment of the present invention, the operating component further includes a first micro switch, which is fixed on the mounting plate, and the rotation of the pressure plate triggers the first micro switch.

[0014] In a preferred embodiment of the present invention, the operating component further includes a second elastic element, one end of which is fixed on the rotating shaft and the other end is fixed on the second pin; or one end of the second elastic element abuts against the second pin and the other end abuts against the upper end of the guide seat; or one end of the second elastic element abuts against the lower end of the guide seat and the other end abuts against the guide post.

[0015] In a preferred embodiment of the present invention, the operating component further includes a first tooth and a handle, and the other end of the rotating shaft is sequentially fitted with the first tooth and the handle, with the first tooth and the handle being fixedly connected.

[0016] In a preferred embodiment of the present invention, the packaging machine further includes a transmission component, a drive component, and a tensioning component. The transmission component is meshed with the first tooth, the drive component is connected to the welding upper tooth, and the transmission component is connected to the tensioning component.

[0017] The welding assembly of this utility model's packaging machine continuously applies pressure to the sliding tooth block through a third elastic element. When the packaging strap softens due to friction and heating, the compressed third elastic element releases some elastic potential energy, continuing to push the upper welding tooth downwards, preventing the sliding tooth block from moving upwards, ensuring that the sliding tooth block is always pressed tightly against the packaging strap, resulting in a good welding effect. Furthermore, it is linked to the pressure block and the first micro switch, so that when the button is pressed down, it drives the pressure block to rotate, which directly drives the welding assembly downwards and triggers the first micro switch, driving the welding assembly to work. The structure is simple and easy to use.

[0018] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the packaging machine handle and buttons in the fallen state according to this utility model.

[0020] Figure 2 for Figure 1 A 3D view of the handle and buttons of a packing machine in the dropped state.

[0021] Figure 3 for Figure 2 Another perspective illustration.

[0022] Figure 4 This is a schematic diagram showing the handle and buttons of the packaging machine of this utility model in the lifted state.

[0023] Figure 5 for Figure 4 A 3D view of the handle and buttons of a packing machine in the dropped state.

[0024] Figure 6 for Figure 5 Another perspective illustration.

[0025] Figure 7 This is an exploded view of the structure of the operating component.

[0026] Figure 8 This is a schematic diagram of the internal structure of the transmission assembly.

[0027] Figure 9 This is a schematic diagram of the internal structure of the packing machine with the handle and buttons in the raised position.

[0028] Figure 10 This is a schematic diagram of the internal structure of a packing machine with the buttons raised and the handle lowered.

[0029] Figure 11 This is a schematic diagram of the internal structure of the intermediate stage of the packing machine.

[0030] Figure 12 This is an exploded view of the fusion welding assembly.

[0031] Figure 13 This is a cross-sectional schematic diagram of the fusion welding assembly.

[0032] 1-Packaging machine; 11-Base; 111-Limit step; 12-Mounting plate; 121-Limit post; 13-Operating component; 131-Rotating shaft; 132-First tooth; 1321-Fixing part; 1322-First sector tooth; 133-Handle; 134-Button; 135-Pressure plate; 1351-First notch; 1352-Second notch; 136-First micro switch; 137-First pin; 138-First elastic element; 139-Second elastic element; 14-Drive assembly; 15-Transmission assembly; 151-Drive component; 152-Reduction gearbox; 153-Worm gear unit; 154-Mounting box; 1541-Hole; 155-Hinge shaft; 156-Fixing shaft; 157-Second micro switch; 158 - Second tooth; 1581- Rod; 1582- Second sector tooth; 1583- Shaft; 1584- Contact; 16- Tensioning assembly; 161- Tensioning wheel; 162- End cap; 163- Tooth plate; 17- Welding assembly; 171- Guide seat; 172- Guide post; 173- Pressure block; 174- Second pin; 175- Roller; 176- Third elastic element; 177- Support shaft; 178- Welding upper tooth; 1781- Ball seat; 1782- Sliding tooth block; 1783- Ball; 1784- Cavity; 1785- Cutting unit; 179- Welding lower tooth; 18- Limiting assembly; 181- First connecting rod; 182- Limiting groove; 183- Fixing element; 184- Second connecting rod; 185- Placement groove.

[0033] In the accompanying drawings, similar reference numerals refer to the same elements. Detailed Implementation

[0034] To make the objectives and technical solutions of the present utility model embodiments clearer, the following will be described in conjunction with the accompanying drawings of the present utility model embodiments. Figure 1 - Appendix Figure 13 The technical solutions of the embodiments of this utility model are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0035] like Figure 1 As shown, a packing machine 1 is used to pack items, including a base 11 and a mounting plate 12. The mounting plate 12 is vertically fixed on the base 11, and the base 11 and the mounting plate 12 are used to provide mounting positions for other components.

[0036] The packing machine 1 also includes an operating component 13, a driving component 14, and a transmission component 15. The operating component 13 passes through and is mounted on the mounting plate 12, and the driving component 14 and the transmission component 15 are mounted on one side of the mounting plate 12.

[0037] The packing machine 1 also includes a tensioning component 16, a welding component 17, and a limiting component 18, which are installed on the other side of the mounting plate 12.

[0038] like Figure 2 As shown, the operating component 13 is rotatably mounted on the mounting plate 12, and the drive component 14 is mounted below the operating component 13 and fixed to the base 11. Figure 3 As shown, the transmission assembly 15 is engaged with the operating assembly 13, and the transmission assembly 15 passes through the mounting plate 12 and is connected to the tensioning assembly 16, as shown. Figure 4 As shown, rotating the operating component 13 drives the transmission component 15 and the tensioning component 16 to move. The welding component 17 is mounted on the base 11, and is located below the operating component 13, as shown. Figure 5 As shown, the operating component 13 rotates, causing the welding component 17 to move up and down; the welding component 17 is connected to the driving component 14, and the driving component 14 drives the welding component 17 to work. The limiting component 18 is installed on the tensioning component 16 and the mounting plate 12 to limit the movement of the tensioning component 16.

[0039] like Figure 3 As shown, the operating component 13 includes a rotating shaft 131, a first toothed portion 132, a handle 133, a button 134, and a pressure plate 135. The rotating shaft 131 passes through the mounting plate 12, with both ends extending out of the mounting plate 12. One end of the rotating shaft 131 is fitted with the first toothed portion 132 and the handle 133. Figure 4 As shown, the other end of the rotating shaft 131 is fitted with the button 134 and the pressure plate 135, and the pressure plate 135 is fixedly connected to the button 134.

[0040] Specifically, such as Figure 3 As shown, one end of the first tooth 132 is fitted onto the rotating shaft 131 and is fixedly connected to the handle 133. The first tooth 132 and the handle 133 can also be an integral structure. The other end of the first tooth 132 is engaged with the transmission assembly 15.

[0041] Specifically, the button 134 and the pressure plate 135 can also be an integral structure.

[0042] like Figure 4 As shown, the operating component 13 also includes a first micro switch 136, which is mounted on the mounting plate 12. The pressure plate 135 rotates to trigger the first micro switch 136.

[0043] like Figure 3 As shown, the operating component 13 also includes a first pin 137 and a first elastic element 138. The first pin 137 passes through one end of the handle 133 near the rotating shaft 131. One end of the first elastic element 138 is fixed on the first pin 137. The other end of the first elastic element 138 is fixed to the drive component 14 or fixed to the base 11.

[0044] like Figure 2 As shown, the operating component 13 further includes a second elastic element 139, which is used to reset the welding component 17. One end of the rotating shaft 131 extending out of the pressure plate 135 is connected to the second elastic element 139, and the other end of the second elastic element 139 is fixed on the welding component 17; or the second elastic element 139 is installed in the welding component 17.

[0045] like Figure 5 As shown, lifting the handle 133 and the button 134 causes the button 134 to rotate the pressure plate 135 together. Figure 6 As shown, the handle 133 drives the first tooth 132 to rotate, and the first tooth 132 meshes with the transmission assembly 15, driving the transmission assembly 15 to move. The first elastic member 138 is used to reset the handle 133 after movement. Figure 2 As shown, when the button 134 is pressed down, the pressure plate 135 rotates and presses against the welding assembly 17, so that the welding assembly 17 contacts the packing strap and performs welding. The second elastic element 139 is used to reset the welding assembly 17.

[0046] like Figure 7 As shown, one end of the first tooth 132 is a fixed part 1321, and the other end is a first sector tooth 1322. The fixed part 1321 is fitted on the rotating shaft 131 and fixed to the handle 133. The first sector tooth 1322 is engaged with the transmission component 15 and drives the transmission component 15 to move.

[0047] like Figure 7As shown, the cross-section of the pressure plate 135 is similar to an ellipse, with at least one arc-shaped edge. A first notch 1351 is provided on the arc-shaped edge, and the arc-shaped edge continues to extend to form a second notch 1352. The straight-line distance from the rotating shaft 131 to the first notch 1351 is less than the straight-line distance from the rotating shaft 131 to the second notch 1352. The pressure plate 135 is always in contact with the welding assembly 17. When the button 134 is lifted, the welding assembly 17 is in contact with the first notch 1351 (see...). Figure 4 The pressure plate 135 presses against the spring of the first micro switch 136. When the button 134 is pressed down, it drives the pressure plate 135 to rotate. The contact point between the welding assembly 17 and the pressure plate 135 slides along the first recess 1351 to the second recess 1352 (see...). Figure 2 The pressure plate 135 releases the spring of the first micro switch 136, and the pressure plate 135 presses the welding assembly 17 to contact the packing strap for welding.

[0048] like Figure 8 As shown, both the button 134 and the handle 133 have portions extending towards each other. When the handle 133 is lifted, it contacts the button 134 and causes the button 134 to rotate.

[0049] like Figure 8 As shown, the transmission assembly 15 includes a drive component 151, a reduction gearbox 152, a worm gear unit 153, and a mounting box 154. The output end of the drive component 151 is sequentially connected to the reduction gearbox 152 and the worm gear unit 153. The worm gear unit 153 passes through the mounting plate 12 and is connected to the tensioning assembly 16. The mounting box 154 is fitted onto the outside of the worm gear unit 153 and is fixedly connected to the reduction gearbox 152.

[0050] The transmission assembly 15 further includes a hinge shaft 155, a fixed shaft 156, a second micro switch 157, and a second tooth 158. The hinge shaft 155 passes through the mounting plate 12, with one end connected to the tensioning assembly 16 and the other end connected to the mounting box 154. The mounting box 154 and the tensioning assembly 16 rotate coaxially with the hinge shaft 155. The fixed shaft 156 and the second micro switch 157 are fixed on the mounting plate 12. The rotation of the second tooth 158 triggers the second micro switch 157. The second tooth 158 is fitted onto the fixed shaft 156, with one end meshing with the first tooth 132, and the other end extending into the mounting box 154 (see...). Figure 9 ).

[0051] The transmission assembly 15 also includes a third micro switch, which is mounted on the packaging machine housing (not shown in the figure). The output of the third micro switch is used to control the tensioning assembly 16. The second micro switch 157 serves only as a position signal for the mechanical structure, supporting the logic control of the entire packaging cycle. When the handle 133 is lifted, the second tooth 158 rotates, triggering the second micro switch 157. The signal of the second micro switch 157 changes, manually triggering the third micro switch to control the tensioning assembly 16 to tighten.

[0052] Specifically, the position and structure of the second tooth 158 and the second micro switch 157 are not limited to the specific embodiments described above. Other structures that can enable the rotation of the handle 133 to trigger the second micro switch 157 can also be used as alternative solutions.

[0053] like Figure 9 As shown, the mounting box 154 has a hole 1541 on the side near the mounting plate 12. The hole 1541 is aligned with the end of the second tooth 158 away from the first tooth 132, and the end portion of the second tooth 158 extends into the hole 1541. Figure 9 As shown, when the handle 133 is lifted and drives the second tooth 158 to rotate, the second tooth 158 pries the mounting box 154 to move, which in turn drives the drive component 151 and the reduction gearbox 152 to move together, and further drives the tensioning assembly 16 to move.

[0054] like Figure 10 As shown, the second toothed portion 158 includes a rod portion 1581, a second sector tooth 1582, a shaft portion 1583, and a contact 1584. The rod portion 1581 is fitted onto the fixed shaft 156, allowing the second toothed portion 158 to rotate around the fixed shaft 156. One end of the rod portion 1581 is the second sector tooth 1582, which meshes with the first sector tooth 1322. The other end of the rod portion 1581 comprises the shaft portion 1583 and the contact 1584. The shaft portion 1583 protrudes and extends towards the mounting box 154, and is inserted into the hole 1541. Figure 9 As shown, when the handle 133 is raised, the position of the contact 1584 changes during rotation, and the spring of the second micro switch 157 changes from being pressed to being unpressed, thereby triggering the second micro switch 157, and the signal of the second micro switch 157 changes.

[0055] like Figure 8 As shown, the mounting plate 12 is also provided with a limiting post 121, which is used to limit the rotation angle of the shaft 1583.

[0056] The hole 1541 includes a low-position pressure-bearing surface and a high-position guide surface, that is, the lowest point surface and the highest point surface of the hole 1541. For example... Figure 10 As shown, when the handle 133 falls, the shaft portion 1583 exerts downward pressure on the lower pressure surface, causing the tensioning assembly 16 to press down; as Figure 11 As shown, when the handle 133 is raised, the shaft 1583 contacts the high-position guide surface, and the contact 1584 releases the spring of the second micro switch 157; Figure 9 As shown, the shaft 1583 rotates further, continuing to contact the high-position guide surface until the mounting box 154 is lifted.

[0057] Specifically, the hole 1541 can be a rounded triangle or other shapes. Other alternative embodiments of the hole 1541 need to meet the following conditions: the hole 1541 can completely enclose the shaft portion 1583 and leave a gap for the movement of the shaft portion 1583, providing space for the shaft portion 1583 to rotate and trigger the second micro switch 157; the hole 1541 needs to have a low-position pressure-bearing surface and a high-position guiding surface, so that the shaft portion 1583 can generate downward pressure on the low-position pressure-bearing surface, causing the tensioning assembly 16 to press down. As the shaft portion 1583 rotates further, the high-position guiding surface always remains in contact with the shaft portion 1583, so that the mounting box 154 rotates at a certain angle under the drive of the shaft portion 1583, allowing the packing strap to be placed in the tensioning assembly 16.

[0058] like Figure 8 As shown, the tensioning assembly 16 includes a tensioning wheel 161, an end cap 162, and a toothed plate 163. The tensioning wheel 161 is connected to the worm gear unit 153 for transmission, and the end cap 162 is fitted onto the hinge shaft 155 (e.g., Figure 5 As shown, the end cap 162 covers the outside of the tensioning wheel 161 and is connected to the tensioning wheel 161. The toothed plate 163 is fixed on the base 11 and located below the tensioning wheel 161. When the handle 133 is lifted, the second tooth 158 triggers the second micro switch 157. The signal of the second micro switch 157 changes, manually triggering the third micro switch. The third micro switch controls the drive member 151, which drives the tensioning wheel 161 to rotate and tighten the packing strap.

[0059] To limit the lowest position of the tensioning wheel 161, such as Figure 6As shown, the base 11 is also provided with a limiting step 111. When the mounting box 154 is lowered, it is placed on the limiting step 111. Since the mounting box 154 is connected to the tensioning wheel 161 and moves synchronously, the limiting step 111 ensures that there is always a gap between the tensioning wheel 161 and the toothed plate 163, preventing the packing strap from being damaged when tightening the thin packing strap.

[0060] Furthermore, the limiting step 111 can be an adjustable structure used to adjust the gap between the tensioning wheel 161 and the toothed plate 163 to accommodate packing straps of different thicknesses. For example, in one specific embodiment, a screw can be provided on the bottom surface of the limiting step 111. By stacking shims on the screw to raise the height of the limiting step 111, the gap between the tensioning wheel 161 and the toothed plate 163 can be changed.

[0061] Specifically, the handle 133 and the first tooth 132 form a force-saving lever, and the second tooth 158 serves as a transmission component, transmitting the movement of the handle 133 and the first tooth 132 to the mounting box 154. The handle 133 has a small rotation range, making it easy for operators to operate. Figure 9 As shown, when the handle 133 is lifted, and the first tooth 132 drives the second tooth 158 to rotate, the shaft 1583 moves within the hole 1541 until it contacts the high guide surface of the hole 1541. The second tooth 158 releases the spring of the second micro switch 157, and the shaft 1583 continues to move until it pries the mounting box 154, thereby lifting the drive component 151, the reduction gearbox 152, and the worm gear unit 153. After the worm gear unit 153 lifts the tensioning wheel 161, the packing strap is placed between the tensioning wheel 161 and the toothed plate 163. Figure 10 As shown, when the handle 133 falls, the first tooth 132 drives the second tooth 158 to rotate in the opposite direction, further driving the tension wheel 161 to fall. The second tooth 158 presses the spring of the second micro switch 157, triggering the second micro switch 157. The signal of the second micro switch 157 changes, manually triggering the third micro switch. The third micro switch sends a signal to the drive member 151, and the drive member 151 drives the tension wheel 161 to tighten. Figure 11 As shown, after packing is completed, the handle 133 is lifted, the shaft 1583 contacts the high-position guide surface, the second tooth 158 releases the spring of the second micro switch 157, the signal of the second micro switch 157 changes, the drive member 151 drives the tension wheel 161 to rotate in the opposite direction, and the packing strap is disengaged; as shown Figure 9As shown, the handle 133 is continuously raised and kept raised, the shaft 1583 is in continuous contact with the high guide surface until the mounting box 158 is raised, the tension wheel 161 is raised, and the packing strap is taken out.

[0062] like Figure 12 As shown, the welding assembly 17 includes a guide seat 171, a guide post 172, a pressure block 173, a second pin 174, and a roller 175. The guide seat 171 is fixed on the mounting plate 12. The guide post 172 passes through the guide seat 171, and the pressure block 173 passes through the guide post 172. The upper end of the pressure block 173 has a concave cross-section. The second pin 174 passes through the upper end of the pressure block 173, and the roller 175 is fitted in the middle of the second pin 174. The roller 175 contacts the pressure plate 135. When the pressure plate 135 rotates, the roller 175 slides from the first recess 1351 into the second recess 1352.

[0063] like Figure 13 As shown, the welding assembly 17 further includes a third elastic element 176, a support shaft 177, an upper welding tooth 178, and a lower welding tooth 179. The lower end diameter of the pressure block 173 is smaller than that of the upper end. The third elastic element 176 is sleeved on the lower end of the pressure block 173. The upper end of the support shaft 177 is installed in the pressure block 173. The third elastic element 176 is located outside the support shaft 177. The upper welding tooth 178 is fixedly connected to the lower end of the guide post 172. The lower welding tooth 179 is fixed on the base 11 and located below the upper welding tooth 178.

[0064] Specifically, the third elastic element 176 is compressed and disposed between the pressure block 173 and the welding upper tooth 178.

[0065] Specifically, the support shaft 177 can be a screw.

[0066] Specifically, in this embodiment, one end of the second elastic member 139 is fixed to the rotating shaft 131, and the other end is fixed to the second pin 174; one end of the second elastic member 139 abuts against the second pin 174, and the other end abuts against the upper end of the guide seat 171; in another embodiment, the second elastic member 139 and the third elastic member 176 are coaxial, one end of the second elastic member 139 abuts against the lower end of the guide seat 171, and the other end abuts against the guide post 172.

[0067] like Figure 12As shown, the welding upper tooth 178 includes a ball seat 1781, a sliding tooth block 1782, and balls 1783. The ball seat 1781 is fixedly connected to the guide post 172. The sliding tooth block 1782 is installed in the ball seat 1781. The sliding tooth block 1782 is connected to the drive assembly 14. A plurality of balls 1783 are provided between the ball seat 1781 and the sliding tooth block 1782.

[0068] like Figure 13 As shown, the welding upper tooth 178 further includes a cavity 1784, which houses the support shaft 177. The cavity 1784 extends through the ball bearing seat 1781 and reaches the sliding tooth block 1782. After the welding upper tooth 178 contacts the packing tape of different thicknesses, the pressure block 173 and the support shaft 177 remain stationary, while the third elastic element 176 continues to compress. The welding upper tooth 178 moves upward a certain distance, and the position of the support shaft 177 changes accordingly within the cavity 1784. The cavity 1784 is used to prevent interference between the welding upper tooth 178 and the support shaft 177.

[0069] The welding upper tooth 178 also includes a cutting unit 1785. One side of the ball bearing seat 1781 is connected to the cutting unit 1785. The cutting unit 1785 moves downward together with the ball bearing seat 1781. The cutting unit 1785 is always in close contact with the upper packing strap. The sliding tooth block 1782 drives the upper packing strap to move horizontally back and forth. The cutting unit 1785 and the upper packing strap generate a relative horizontal back and forth motion to cut the packing strap.

[0070] like Figure 1 As shown, the limiting assembly 18 includes a first connecting rod 181, a limiting groove 182, a fixing member 183, and a second connecting rod 184. The first connecting rod 181 has the limiting groove 182, the fixing member 183 is placed in the limiting groove 182, the fixing member 183 moves in the limiting groove 182, and one end of the second connecting rod 184 is engaged with one end of the first connecting rod 181.

[0071] Specifically, one end of the first connecting rod 181 that meshes with the second connecting rod 184 is rotatably mounted on the mounting plate 12, and the fixing member 183 is fixed to the end cover 162. Figure 4 As shown, when the tensioning assembly 16 is lifted, the fixing member 183 moves in the limiting groove 182 and drives the first connecting rod 181 to move. The first connecting rod 181 drives the second connecting rod 184 to move by engaging with the second connecting rod 184.

[0072] Specifically, in this embodiment, the ends of the first connecting rod 181 and the second connecting rod 184 away from the meshing end extend towards the mounting plate 12 and then bend downward. A placement groove 185 is opened at the corresponding position on the base 11. In the initial state, the ends of the first connecting rod 181 and the second connecting rod 184 away from the meshing end are placed into the placement groove 185.

[0073] The specific working principle of the packaging machine 1 is as follows: In the initial state, the handle 133 is in a naturally falling state, and the operating component 13, the transmission component 15, and the tensioning component 16 are all in a falling state. The contact 1584 is in contact with the spring of the second micro switch 157. The button 134 is in a raised state, the welding component 17 is in a raised state, and the contact point between the roller 175 and the pressure plate 135 is the first notch 1351. The pressure plate 135 presses down on the spring of the first micro switch 136.

[0074] like Figure 9 As shown, in use, lifting the handle 133 causes the first tooth 132 to rotate, driving the second tooth 158 to rotate. The shaft 1583 moves upward in the hole 1541, and the contact 1584 moves away from the spring of the second micro switch 157. The second tooth 158 continues to rotate until it hits the limit post 121. The shaft 1583 lifts the mounting box 154, thereby driving the drive component 151, the reduction gearbox 152, and the worm gear unit 153. The worm gear unit 153 drives the tension wheel 161 and the end cover 162 to lift, increasing the distance between the tension wheel 161 and the toothed plate 163. Figure 4 As shown, the fixing member 183 moves to the second position in the limiting groove 182, pulling one end of the first connecting rod 181 upward. The first connecting rod 181 and the second connecting rod 184 mesh, causing the end of the second connecting rod 184 away from the meshing point to lift up.

[0075] The packing tape is double-layered and placed on the toothed plate 163 and the welding lower tooth 179, as follows: Figure 10 As shown, when the handle 133 is pressed down, the first tooth 132 drives the second tooth 158 to move, thereby causing the tension wheel 161 and the end cap 162 to fall and contact the packing strap. When the second tooth 158 rotates, the contact 1584 presses the spring of the second micro switch 157, causing the signal of the second micro switch 157 to change, manually triggering the third micro switch. The third micro switch controls the drive member 151, which drives the tension wheel 161 to rotate. The shaft 1583 continues to press down on the hole 1541, causing the tension wheel 161 to continue to press down and tighten the packing strap. After the packing strap is tightened, as... Figure 11 As shown, pressing button 134 causes the pressure plate 135 to rotate. The contact point between the pressure plate 135 and the roller 175 slides from the first recess 1351 into the second recess 1352. The pressure plate 135 presses the roller 175, causing the pressure block 173 to move downwards, which in turn causes the guide post 172 and the ball bearing seat 1781 to move downwards until the sliding tooth block 1782 contacts the packing strap. The third elastic element 176 is further compressed, and the sliding tooth block 1782 moves upwards a certain distance. The support shaft 177 moves accordingly in the cavity 1784, and the sliding tooth block 1782 is pressed tightly against the packing strap. The rotation of the pressure plate 135 releases the spring of the first micro switch 136, causing the signal of the first micro switch 136 to change. The drive assembly 14 drives the sliding tooth block 1782 to reciprocate horizontally, frictionally welding the packing strap. During the welding process of the packing strap, friction heating softens it, reducing its thickness. The distance between the sliding tooth block 1782 and the lower welding tooth 179 tends to increase. The compressed third elastic element 176 releases some elastic potential energy, continuing to push the upper welding tooth 17 downwards, ensuring that the sliding tooth block 1782 remains pressed firmly against the packing strap, providing a continuous and stable clamping force. The cutting unit 1785 remains in close contact with the upper packing strap during the welding process, reciprocating horizontally along with the sliding tooth block 1782 to cut the packing strap.

[0076] The drive component 14 stops working after the set welding time, thus completing the welding process. Figure 9 As shown, lifting the handle 133 causes the first tooth 132 to rotate, and the second tooth 158 engages and rotates. The shaft 1583 contacts the high-position guide surface of the hole 1541, and the contact 1584 releases the spring of the second micro switch 157. The signal of the second micro switch 157 changes, and the drive member 151 drives the tension wheel 161 to rotate in the opposite direction, thus removing the packing strap. The shaft 1583 continues to contact the high-position guide surface of the hole 1541 and lifts the mounting box 154. The tension wheel 161, under the linkage of the second tooth 158, is lifted upward to its highest position, providing space for the strap to retract. When the handle 133 is lifted, it contacts the button 134 and causes the button 134 to lift together. The pressure plate 135 rotates accordingly, pressing the spring of the first micro switch 136. The contact point between the roller 175 and the pressure plate 135 slides from the second recess 1352 to the first recess 1351. The second elastic element 139 pulls the pressure block 173 upward, causing the upper welding tooth 178 to move away from the lower welding tooth 179, removing the packing strap, and then the handle 133 is lowered, returning to the initial state.

[0077] Components not described in detail in this utility model, such as the drive assembly, worm gear unit, and cutter unit, are all existing technologies in the field and are known and understood by those skilled in the art. Therefore, they are not described in detail in the specification of this utility model.

[0078] The welding assembly of this utility model's packaging machine continuously applies pressure to the sliding tooth block through a third elastic element. When the packaging strap softens due to friction and heating, the compressed third elastic element releases some elastic potential energy, continuing to push the upper welding tooth downwards, preventing the sliding tooth block from moving upwards, ensuring that the sliding tooth block is always pressed tightly against the packaging strap, resulting in a good welding effect. Furthermore, it is linked to the pressure block and the first micro switch, so that when the button is pressed down, it drives the pressure block to rotate, which directly drives the welding assembly downwards and triggers the first micro switch, driving the welding assembly to work. The structure is simple and easy to use.

[0079] Although the present invention has been disclosed above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A fusion assembly of a baler, characterized in It includes a pressure block, a third elastic element, a support shaft, a guide post, and a welding upper tooth. The third elastic element is fitted onto the lower end of the pressure block. One end of the support shaft is fixed to the pressure block, and the other end of the support shaft faces the welding upper tooth. The pressure block passes through the guide post, and the guide post and the welding upper tooth are fixedly connected.

2. A sealing assembly for a baler as claimed in claim 1, characterized in that The upper tooth of the welding joint has a cavity, and the other end of the support shaft is located in the cavity. During the welding process, the position of the support shaft in the cavity changes.

3. A sealing assembly for a baler as claimed in claim 2, wherein, The welding upper tooth includes a ball seat, a sliding tooth block, and balls. The ball seat is fixedly connected to the guide post. The sliding tooth block is installed in the ball seat. A plurality of balls are provided between the ball seat and the sliding tooth block. The driving component drives the sliding tooth block to reciprocate horizontally.

4. A sealing assembly for a baler as claimed in claim 3, wherein, The cavity extends through the ball bearing seat and into the sliding tooth block.

5. A sealing assembly for a baler as claimed in claim 4, wherein, It also includes a second pin and a roller, the second pin passing through the upper end of the pressure block, and the roller being fitted onto the second pin.

6. A sealing assembly for a baler as claimed in claim 5, wherein, It also includes a lower welding tooth, which is located below the upper welding tooth.

7. A baler comprising a sealing assembly according to any one of the preceding claims, characterized in that The device includes a mounting plate and an operating component. The operating component is mounted on the mounting plate and includes a rotating shaft, a button, and a pressure plate. The rotating shaft passes through the mounting plate, and one end of the rotating shaft is fitted with the button and the pressure plate. The button and the pressure plate are fixedly connected.

8. A baler as claimed in claim 7 wherein, The pressure plate abuts against the roller. The pressure plate is provided with a first notch and a second notch. When the pressure plate rotates, the contact point between the roller and the pressure plate switches between the first notch and the second notch.

9. A baler as claimed in claim 8 wherein, The operating component also includes a first micro switch, which is fixed on the mounting plate, and the rotation of the pressure plate triggers the first micro switch.

10. A baler as claimed in claim 9 wherein, The welding assembly includes a guide seat fixed to the mounting plate, and a guide post passing through the guide seat; the operating assembly also includes a second elastic element, one end of which is fixed to the rotating shaft and the other end to the second pin; or one end of the second elastic element abuts against the second pin and the other end abuts against the upper end of the guide seat; or one end of the second elastic element abuts against the lower end of the guide seat and the other end abuts against the guide post.

11. A baler as claimed in claim 10 wherein, The operating component also includes a first tooth and a handle. The other end of the rotating shaft is fitted with the first tooth and the handle in sequence, and the first tooth is fixedly connected to the handle.

12. A baler as claimed in claim 11 wherein, The packaging machine further includes a transmission assembly, a drive assembly, and a tensioning assembly. The transmission assembly is meshed with the first tooth, the drive assembly is connected to the welding upper tooth, and the transmission assembly is connected to the tensioning assembly.

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