Portable packing machine and automatic control method for lifting up of tensioning wheel and pressing down of upper welding assembly

Abstract

The invention provides a portable packaging machine and a method for automatically controlling lifting of a tensioning wheel, pressing of an upper welding assembly and pressing of the portable packaging machine, the portable packaging machine comprises lifting and pressing power and a control assembly, the control assembly is provided with an inductive switch, and the control assembly controls the lifting and pressing power to start or stop and forward rotation or reverse rotation; the portable packing machine is further provided with a lifting downward pressing assembly, lifting and downward pressing power is output through a first transmission mechanism, and the tensioning wheel assembly is driven to rotate to lift and the downward pressing assembly downwards presses the upper welding assembly at different stages. The first transmission mechanism is further connected with a matching piece corresponding to the inductive switch, and lifting power and pressing power serve as driving power of the matching piece at the same time. Through combined application of the same set of control mechanism and the same motor, the tensioning wheel is automatically lifted, and the upper welding assembly is pressed downwards, so that the whole machine automation degree of the portable packing machine is high, and the structure is simple and reliable.

Description

Technical Field

[0001] The present invention relates to the field of portable strapping machines, and is a tensioning mechanism of a portable strapping machine. Background Art

[0002] A portable strapping machine is a portable bundling device used to conveniently carry to relevant work points to bundle items. The portable strapping machine includes a tensioning mechanism and a welding mechanism. Among them, the tensioning mechanism includes a tensioning wheel assembly and a tensioning drive assembly. The tensioning wheel assembly and the tensioning drive assembly are respectively located on both sides of the base, and they are connected to a common pin shaft, and the pin shaft is used as a rotation fulcrum for lifting and opening and downward resetting. After the belt is tensioned, the upper welding assembly presses down, and the joint of the strapping belt is pressed on the lower welding assembly for welding. In the prior art, in the past, the tensioning wheel was often lifted by directly fixing and connecting the mechanical structure with a handle, and the tensioning wheel assembly and the tensioning drive assembly were lifted manually to insert or remove the strapping belt; for the downward pressing of the upper welding assembly, the handle was used to directly control the rotation of the cam block, and the upper welding assembly was pressed manually; the degree of automation was low, time-consuming and laborious. In the prior art, for driving the upper welding assembly to press down by a motor, a series of complex structures such as a corrugated rod and a multi-joint connecting rod are mostly used. Summary of the Invention

[0003] The purpose of the present invention is to provide a portable strapping machine that can automatically lift the tensioning wheel and press down the upper welding assembly through the same set of control mechanism and the same motor, with a compact and simple structure, good combination and high degree of automation. To this end, the present invention adopts the following technical solutions: A portable strapping machine includes a tensioning wheel assembly, an upper welding assembly, a shaft and a base. The tensioning wheel assembly is rotatably installed on the base through the shaft, and a tensioning wheel is arranged in the tensioning wheel assembly; it is characterized in that the portable strapping machine further includes a lifting and pressing power and a control component, the control component is provided with an induction switch, and the control component controls the start or stop and forward or reverse rotation of the lifting and pressing power; the portable strapping machine is further provided with a liftable pressing component, the lifting and pressing power outputs power through a first transmission mechanism, and drives the tensioning wheel assembly to rotate and lift and the pressing component to press down the upper welding assembly at different stages; the first transmission mechanism is further connected to a fitting corresponding to the induction switch, and the lifting and pressing power also serves as the driving power of the fitting.

[0004] On the basis of adopting the above technical solutions, the present invention can also adopt the following technical solutions, or use these technical solutions in combination: The control assembly is provided with a first induction switch and a second induction switch, as well as the fitting for cooperating with the first induction switch and the second induction switch. The fitting is a rotational fitting. The first induction switch and the second induction switch are arranged along the rotation path of the rotational fitting. The first induction switch is used to stop the lifting and pressing power when the lifting and pressing power rotates in the first direction to drive the tensioning wheel to lift in place, and when the lifting and pressing power rotates in the second direction to drive the upper welding assembly to press in place. The second induction switch is used to stop the second-direction rotation of the lifting and pressing power when the tensioning wheel descends from the lifted position to the initial position, and to stop the first-direction rotation of the lifting and pressing power when the upper welding assembly lifts in place.

[0005] The control assembly is further provided with a tensioning working switch and a welding working switch, which are respectively used to start the first-direction rotation of the lifting and pressing power when it is necessary to lift the tensioning wheel assembly, and to start the second-direction rotation of the lifting and pressing power when it is necessary to press the upper welding assembly.

[0006] The rotational fitting is connected to the lifting and pressing power through a first transmission mechanism.

[0007] The portable strapping machine is provided with a lifting connecting piece. The lifting connecting piece is connected to the tensioning wheel assembly through a connecting structure. The lifting connecting piece is unidirectionally connected to the lifting and pressing power. When the lifting and pressing power rotates in the first direction to drive the tensioning wheel assembly to lift, it is drivingly connected to the lifting connecting piece. When the lifting and pressing power rotates in the second direction, it is disengaged from the driving connection with the lifting connecting piece.

[0008] The first transmission mechanism adopts a gear meshing connection mechanism. Its first gear is connected to the lifting and pressing power. Its second gear is in transmission connection with the first gear and rotates in the opposite direction to the first gear. The fitting and the pressing driving connecting piece for pressing the pressing assembly rotate synchronously and in the same direction as the second gear. The first structure for lifting the tensioning wheel assembly rotates synchronously and in the same direction as the first gear.

[0009] The first transmission mechanism adopts a gear meshing connection mechanism. Its first gear is connected to the lifting and pressing power. Its second gear is in transmission connection with the first gear and rotates in the opposite direction to the first gear. The fitting and the power output structure for pressing the pressing assembly are connected to the rotating shaft of the second gear and rotate synchronously and in the same direction as the second gear. The first structure unidirectionally connected to the lifting connecting piece is installed on the first gear.

[0010] The lifting connecting piece adopts a hook with a bent arm.

[0011] The induction switch is arranged on a fixed base, and a second structure for limiting and supporting the lifting connecting piece is arranged on the fixed base when the tensioning wheel is lifted to the extreme position. The lifting connecting piece is connected with an elastic component and is elastically supported, and can adaptively maintain its position when the lifting connecting piece contacts and disengages from the first structure for supporting and limiting the lifting connecting piece.

[0012] The lifting connecting piece is rotatably connected and installed, and the elastic component is arranged between the lifting connecting piece and its connecting base piece.

[0013] The lifting and pressing power is fixed on the first side of the base, the first transmission mechanism is located on the second side of the base, and the machine cover is located on the second side of the base; the tensioning wheel assembly is located on the first side of the base, the lifting connecting piece is located on the second side of the base and is rotatably connected with the machine cover, and an elastic component is arranged between the lifting connecting piece and the machine cover to be elastically supported; the upper welding assembly, the pressing component, and the pressing driving connecting piece for pressing the pressing component are located on the first side of the base, and the machine cover and the tensioning wheel assembly are rotatably installed on the base through the shaft and rotate synchronously.

[0014] The shaft has shaft sections on the first side and the second side of the base respectively. The tensioning wheel assembly and the machine cover are respectively connected with the shaft section on the first side and the shaft section on the second side of the shaft. The tensioning wheel and the tensioning driving motor are connected together through a second transmission mechanism and can rotate synchronously with the shaft as the fulcrum. The tensioning driving motor is located on the second side of the base and is fixedly connected with the machine cover.

[0015] The hand-held strapping machine is provided with a handle for operating the tensioning working switch. The handle is rotatably connected with the fixed base and is connected with a return spring.

[0016] The tensioning working switch is a microswitch, which is set to be in the first state when the handle is lifted, and the lifting and pressing power is started to rotate in the first direction. When the handle is lowered from the lifted state, the lifting and pressing power rotates in the second direction opposite to the first direction.

[0017] The hand-held strapping machine is also provided with a first reset mechanism, which drives the tensioning wheel assembly and the components rotating synchronously with the tensioning wheel assembly around the shaft to reset downward through the first reset mechanism.

[0018] The pressing component is rotatably connected with the base. The pressing component includes a rotating frame, the rotating frame is rotatably connected with the base, a pressing acting piece supported by an elastic mechanism is arranged on the rotating frame, and a component cooperating with the pressing driving connecting piece is arranged on the rotating frame.

[0019] The component cooperating with the pressing driving connecting piece is a roller, the pressing driving connecting piece adopts a rotating cam block, and a positioning concave arc structure cooperating with the roller is arranged at the end of the rotating cam block.

[0020] The pressing-down component includes a bolt, and the bolt head is located at the lower end as the pressing-down acting piece. The bolt passes through the rotating frame and is slidably connected to the rotating frame. An elastic mechanism whose force value is adjusted by a nut threadedly connected to the bolt is provided between the rotating frame and the bolt head.

[0021] The pressing-down acting piece is provided with a spherical shape to cooperate with the top surface of the upper welding component.

[0022] The pressing-down component is configured with a second reset and lifting mechanism.

[0023] According to the second aspect of the present invention, the present invention provides an automatic control method for lifting the tensioning wheel and pressing down the upper welding component, which is characterized by including the following steps: (a) Initial state The handle is in the lowered state and contacts the tensioning working switch, the rotating fitting contacts the second induction switch, and the lifting connecting piece is disengaged from the first structure; at this time, the tensioning wheel assembly is in the original position, and the pressing-down component and the upper welding component are in the lifted state; (b) Lifting the tensioning wheel to release the tape Lift the handle to disengage from the tensioning working switch, the motor rotates in the first direction, the rotating fitting rotates to contact the first induction switch, the first structure drives the lifting connecting piece to lift, and the pressing-down driving connecting piece further rotates upward; at this time, the tensioning wheel assembly is lifted, and the pressing-down component and the upper welding component are in the lifted state; (c) Tightening the tape Lower the handle. At this time, the motor rotates in the second direction, the rotating fitting rotates to contact the second induction switch, and the lifting connecting piece is disengaged from the first structure. At this time, the tensioning wheel assembly is lowered, the tensioning wheel driving motor is started to tighten the tape, the pressing-down driving connecting piece rotates downward to the (a) initial state, the pressing-down component and the upper welding component are in the lifted state, and after the handle is lowered, it contacts the tensioning working switch; (d) Entering the welding state After the tape is tightened, welding work is carried out; the welding working switch is started, the motor rotates in the second direction, the rotating fitting rotates to contact the first induction switch, the pressing-down driving connecting piece rotates downward until the pressing-down component presses down the upper welding component in place; at this time, the handle is in the lowered state and contacts the tensioning working switch, and the first structure further moves away from the lifting connecting piece; the tensioning wheel assembly is in the lowered state, the upper welding component is pressed down in place, the upper and lower welding plates cooperate to tightly press the packing tape, and the welding driving motor starts welding; (e) Reset After the welding driving motor finishes working, the motor rotates in the first direction, the rotating fitting rotates to contact the second induction switch, and the first structure returns to the state of (c). At this time, the tensioning wheel assembly is lowered, the pressing-down component and the upper welding component are lifted and reset by the reset and lifting mechanism, and the handle is in the lowered state and contacts the tensioning working switch; (f)The tensioning wheel is lifted to take the belt Same as state (b); (g)Return to the initial state Same as state (a).

[0024] Due to the adoption of the technical solution of the present invention, the present invention can be jointly applied by the same set of control mechanisms and the same motor to automatically lift the tensioning wheel and press down the upper welding assembly, making the whole machine of the hand-held strapping machine highly automated and the structure simple and reliable. Moreover, in the structure of the present invention, the state after the tensioning wheel is lifted is stable, the action is sensitive and the operation is power-saving when descending, and the structure of pressing down the welding upper assembly is also simple, which can be well applied to the welding work of narrow and thin strapping belts. Brief Description of the Drawings

[0025] Figure 1 It is an exploded view of an embodiment of the present invention.

[0026] Figure 2 It is a schematic connection diagram of the lifting and pressing power and transmission mechanism.

[0027] Figure 3 It is a schematic diagram of the induction switch of an embodiment of the present invention when the tensioning wheel is in the initial state.

[0028] Figure 4 It is a schematic diagram of the induction switch of an embodiment of the present invention when the tensioning wheel is lifted in place.

[0029] Figure 5 It is a schematic diagram of the induction switch of an embodiment of the present invention when the upper welding assembly is in the initial state after the bag is tensioned.

[0030] Figure 6 It is a schematic diagram of the induction switch of an embodiment of the present invention when the upper welding assembly is pressed down to the bottom.

[0031] Figure 7 、 8 、9 are respectively schematic diagrams of an embodiment of the present invention.

[0032] Figure 10-1 It is a sequential change demonstration diagram in the working process of the present invention, showing the first four typical states, Figure 10-2 For continuing in Figure 10-1 It is a sequential change demonstration diagram of the last three typical states in the working process of the present invention after, in which the upper demonstration diagram is the front view observed from the second side, and the lower demonstration diagram is the front view observed from the first side. Embodiment

[0033] Refer to the attached drawings. A portable strapping machine provided by the present invention includes a tensioning wheel assembly, an upper welding assembly 200, a shaft 1, and a base 100. The tensioning wheel assembly is rotatably mounted on the base 100 through the shaft 1. A tensioning wheel 2 is provided in the tensioning wheel assembly, and a tensioning wheel cover 20 may also be included. The portable strapping machine is provided with a lower welding assembly 202 that cooperates with the upper welding assembly 200 to complete the welding work, and a welding drive motor 203 that drives the upper welding assembly 200 to vibrate. The portable strapping machine further includes a lifting and pressing power source, namely a motor 3, and a control assembly. The control assembly is provided with an induction switch, and the control assembly controls the start or stop and forward or reverse rotation of the lifting and pressing power source. The portable strapping machine is also provided with a liftable pressing assembly. The lifting and pressing power source outputs power through a first transmission mechanism, and drives the tensioning wheel assembly to rotate, lift, and drive the pressing assembly to press the upper welding assembly 200 at different stages. The pressing assembly is configured with a reset lifting mechanism 201. The reset lifting mechanism 201 can first act on the upper welding assembly 200 to reset it. When the upper welding assembly 200 rises and resets, the pressing assembly is also reset. The first transmission mechanism is also connected to a mating part corresponding to the induction switch, and the lifting and pressing power source also serves as the driving power for the mating part.

[0034] The control assembly is provided with a first induction switch 41 and a second induction switch 42, and the mating part for cooperating with the first induction switch and the second induction switch. The mating part is a rotational mating part 4. The first induction switch 41 and the second induction switch 42 are arranged along the rotation path of the rotational mating part 4. The first induction switch 41 is used to stop the lifting and pressing power source when the lifting and pressing power source rotates in the first direction to drive the tensioning wheel 2 to lift in place, and when the lifting and pressing power source rotates in the second direction to drive the upper welding assembly 200 to press in place. The second induction switch 42 is used to stop the second-direction rotation of the lifting and pressing power source when the tensioning wheel 2 descends from the lifted position to the initial position, and when the upper welding assembly 200 lifts in place, to stop the first-direction rotation of the lifting and pressing power source. The first induction switch 41 and the second induction switch 42 can adopt microswitches. The rotational mating part 4 is set as a fan-shaped block, which has a top arc and corner parts on both sides of the top arc and cooperates with the first induction switch 41 and the second induction switch 42 respectively.

[0035] The control assembly is also provided with a tensioning work switch 40 and a welding work switch (the control switch is not shown in the figure, and it is connected to the circuit of the motor 3 and is used to start the motor to rotate in the second direction opposite to the first direction). They are respectively used to start the first-direction rotation of the lifting and pressing power source when it is necessary to lift the tensioning wheel assembly, and to start the second-direction rotation of the lifting and pressing power source when it is necessary to press the upper welding assembly 200.

[0036] The working time of the welding drive motor 203 and the reverse timing of the motor 3 can be achieved through the timer in the control component.

[0037] The rotating fitting 4 is power-connected to the lifting and pressing through the first transmission mechanism.

[0038] The automatic tensioning mechanism is provided with a lifting connecting piece 5. The lifting connecting piece is connected to the tensioning wheel assembly through a connecting structure. This connecting structure can be a structure directly connected to the tensioning wheel assembly, or the lifting connecting piece is connected to a component that rotates synchronously around the shaft 1 with the tensioning wheel assembly, and this synchronously rotating component around the shaft 1 is also regarded as a part of the connecting structure. The latter implementation manner is adopted in the present invention and will be described in detail below.

[0039] The lifting connecting piece 5 is unidirectionally connected to the lifting and pressing power. When the lifting and pressing power rotates in the first direction to drive the tensioning wheel assembly to lift, it is drivingly connected to the lifting and pressing power. When the lifting and pressing power rotates in the second direction, it is disengaged from the driving connection with the lifting and pressing power.

[0040] The first transmission mechanism adopts a gear meshing connection mechanism. Its first gear 61 is connected to the lifting and pressing power. Its second gear 62 is drivingly connected to the first gear and rotates in the opposite direction. The rotating fitting 4 and the pressing drive connecting piece 6 for pressing down the pressing component rotate synchronously and in the same direction as the second gear 62. The first structure 50 for lifting the tensioning wheel assembly rotates synchronously and in the same direction as the first gear 61. During implementation, the rotating fitting 4 and the power output structure for pressing down the pressing component, that is, the pressing drive connecting piece 6, are connected to the rotating shaft 620 of the second gear 62 and rotate synchronously and in the same direction as the second gear 62. The first structure 50 that is unidirectionally connected to the lifting connecting piece 5 is installed on the first gear 61.

[0041] The lifting connecting piece 5 adopts a hook 51 with a bent arm. The first structure 50 can be a pin, block, etc. fixed on the first gear 61 and protruding to the side.

[0042] The first induction switch 41 and the second induction switch 42 are arranged on a fixed base. In the present invention, the fixed base can be the base 100 of the portable strapping machine or a component fixedly connected to the base 100. In this embodiment, the first induction switch 41 and the second induction switch 42 are arranged on the fixing plate 101. The fixing plate 101 serves as the fixed base. The fixing plate 101 can be an integral part of the base 100 or a separate component fixedly installed on the base 100. The fixing plate 101 is provided with a second structure 102 for limiting and supporting the lifting connecting piece when the tensioning wheel 2 is lifted to the extreme position. When the lifting connecting piece and the tensioning wheel assembly lift and rotate with the shaft 1 as the fulcrum, it gradually enters the limiting and supporting range of the second structure 102.

[0043] The lifting connecting piece is rotatably connected and installed on its connecting base piece. The connecting base piece can be a tension pulley assembly or a component that rotates synchronously with the tension pulley assembly around the shaft 1. The lifting connecting piece 5 is connected with an elastic component 52 and is elastically supported, and can adaptively maintain its position when the lifting connecting piece contacts the first structure 50 that supports the lifting connecting piece. Even when it is released from the control of the hand, under the combined action of the elastic support of the elastic component 52, the support of the first structure 50, the support and limitation of the second structure 102, and being balanced with gravity, it can prevent the lifting connecting piece 5 from moving downward, so that the tension pulley assembly can also be stably positioned at a high position. When the motor 3 rotates in reverse and the lifting connecting piece is disengaged from the driving connection with the first structure 50 (that is, when the motor 3 rotates in the second direction), after it completely exits the second structure 102, it can also be supported by the elastic component 52. The second structure 102 can be a section of curved wall.

[0044] With the structure of the present invention, the lifting and pressing power is fixed on the first side of the base 100, the first transmission mechanism is located on the second side of the base 100, the machine cover 7 is located on the second side of the base 100, and the tension pulley assembly is located on the first side of the base 100, so that enough space can be left for the welding drive motor 203 and the tension pulley drive motor 21 to be arranged on the second side. The lifting connecting piece 5 is located on the second side of the base 100. The machine cover 7 serves as the connecting base piece of the lifting connecting piece 5. The lifting connecting piece 5 is rotatably connected with the machine cover 7, and an elastic component is arranged between the lifting connecting piece 5 and the machine cover 7 to be elastically supported. The elastic component 52 is a torsion spring, and the torsion spring is sleeved on the rotation connecting shaft of the lifting connecting piece and the machine cover 7. The machine cover 7 and the tension pulley assembly are rotatably installed on the base 100 through the shaft 1 and rotate synchronously. The upper welding assembly 200, the pressing assembly, and the pressing drive connecting piece 6 are located on the first side of the base 100.

[0045] The hand-held bundling machine is provided with a handle 103 for operating the tension working switch 40. The handle 103 is rotatably connected with a fixed base and is connected with a return spring 104. The fixed base can be the base 100 of the hand-held bundling machine or a component fixedly connected with the base 100. In this embodiment, the fixed base is the above-mentioned fixing plate 101. The tension working switch 40 is a micro switch. When the handle is lifted, it is in one switch state, and when the handle is released (driven by the return spring 104 to rotate downward and reset), it is in another switch state. Thus, during the lifting and lowering operations of the tension pulley 2, a single switch can be used to continuously control the rotation in the first direction and the second direction of the lifting and pressing power.

[0046] The shaft 1 is a fixed shaft, fixedly connected to the base 100 and unable to rotate. There is no gap that would cause dragging during the tensioning operation in the middle of the shaft 1, which improves the collimation of the tensioning wheel during the tensioning operation, prevents the tensioning wheel 2 from skewing in the thickness direction, and improves the uniform pressing of the circumferential surface of the tensioning wheel 2 on the belt during the tensioning operation, helping to prevent the problem of belt deviation. The fixed connection method can adopt the interference fit connection between the fixed shaft 1 and the shaft hole in the base 100. The tensioning wheel 2 and the tensioning wheel drive motor 21 are connected together through the second transmission mechanism 22 and can rotate synchronously with the fixed shaft 1 as the fulcrum, lifting the tensioning wheel 2 upward and resetting the tensioning wheel 2 downward. The drive motor 21 is fixedly installed outside the machine cover 7. The machine cover 7 is provided with a hole for connecting the second transmission mechanism to the drive motor 21, such as for the motor shaft to pass through. In this embodiment, the second transmission mechanism 22 adopts a worm and worm wheel mechanism, and the drive motor 21 is connected to the tensioning wheel 2 through the worm and worm wheel mechanism and drives the tensioning wheel 2 to rotate.

[0047] Bearings are provided at the parts where the tensioning wheel cover 20 is rotatably connected to the fixed shaft and are rotatably connected to the fixed shaft through the bearings respectively. The bearings also include the form of a shaft sleeve at the same time.

[0048] The portable strapping machine is also provided with an outer side limit member 23 for the packing belt. In this embodiment, the outer side limit member 23 is located on the first side of the base 100 and is connected to the base 100 through a connecting shaft and is synchronized with the tensioning wheel 2 to be lifted and lowered to the outer side of the packing belt (i.e., the outer side of the joint of the tensioning wheel 2 and the lower tensioning tooth plate). A stroke limit structure for the outer side limit member 23 (such as a shaft pin fixedly connected to the tensioning wheel cover 20) is provided on the tensioning wheel cover 20. The outer side limit member 23 can be set as an arc-shaped plate, and an arc-shaped limit hole is provided inside it to cooperate with the stroke limit structure.

[0049] The portable strapping machine is also provided with a first reset mechanism 24. The elastic component in the first reset mechanism 24 drives the tensioning wheel assembly on the first side of the base 100 and the machine cover, the drive motor 21, and the second transmission mechanism 22 on the second side of the base 100 to be reset downward. Preferably, the first reset mechanism 24 is provided on the base 100 deviating from the fixed shaft 1 and acts on the reset cooperation component 25 between the tensioning wheel 2 and the drive motor 21. Thus, not only can the lever arm of the reset force be increased to improve the reset performance, but also the reset mechanism can play an auxiliary role in the collimation of the tensioning wheel, prevent the tensioning wheel 2 from skewing in the thickness direction, and prevent the belt from deviating.

[0050] The reset cooperation component 25 is sleeved on the shaft of the second transmission mechanism 22 and is fixedly connected to the machine cover 7, and rotates synchronously with the tensioning wheel 2 and the drive motor 21 with the fixed shaft 1 as the fulcrum when the tensioning wheel 2 is opened upward and reset downward.

[0051] In the present invention, the pressing-down assembly is rotatably connected to the base 100 of the portable strapping machine. The pressing-down assembly includes a rotating frame 91, which is rotatably connected to the base 100 through a shaft 97. An elastic mechanism 92 supports a pressing-down member 93 on the rotating frame 91, and a component cooperating with the pressing-down driving connecting member 6 is provided on the rotating frame 91. The component cooperating with the pressing-down driving connecting member 6 is a roller 94. The pressing-down driving connecting member 6 is a rotating cam block, and a positioning concave arc structure 60 cooperating with the roller is provided at the end of the rotating cam block. Further, a bolt 95 is included in the pressing-down assembly. The bolt head is located at the lower end as the pressing-down member 93. The bolt 95 passes through the rotating frame and is slidably connected to the rotating frame 91. An elastic mechanism 92 whose force value is adjusted by a nut 96 threadedly connected to the bolt 95 is provided between the rotating frame 91 and the bolt head. With this structure, not only the pressing-down and the lifting and resetting are smoothly connected and sensitive, but also buffering can be provided and the pressing-down force value can be adjusted.

[0052] The pressing-down member 93 is provided with a spherical shape to cooperate with the top surface of the upper welding assembly.

[0053] As Figure 10-1 、 10-2 shown, the operation process of this embodiment is as follows: (a) Initial state The handle 103 is in the lowered state and contacts the tensioning working switch 40. The rotating fitting 4 contacts the second induction switch 42, and the lifting connecting member 5 is disengaged from the first structure 50. At this time, the tensioning wheel assembly is in the original position, and the pressing-down assembly and the upper welding assembly 200 are in the lifted state.

[0054] (b) The tensioning wheel 2 is lifted to release the tape The handle 103 is lifted to disengage from the tensioning working switch 40. The motor 3 rotates in the first direction. The rotating fitting 4 rotates to contact the first induction switch 41. The first structure 50 drives the lifting connecting member 5 to lift, and the pressing-down driving connecting member 6 further rotates upward. At this time, the tensioning wheel assembly is lifted, and the pressing-down assembly and the upper welding assembly 200 are in the lifted state.

[0055] (c) The tape is tensioned The handle 103 is lowered. At this time, the motor 3 rotates in the second direction. The rotating fitting 4 rotates to contact the second induction switch 42, and the lifting connecting member 5 is disengaged from the first structure 50. At this time, the tensioning wheel assembly is lowered, and the tensioning wheel driving motor 21 is started to tension the tape. The pressing-down driving connecting member 6 rotates downward to the (a) initial state. The pressing-down assembly and the upper welding assembly 200 are in the lifted state. After the handle is lowered, it contacts the tensioning working switch 40.

[0056] (d) Enter the welding state After the tensioning belt, the welding operation is carried out. Start the welding operation switch, the motor 3 rotates in the second direction, the rotating fitting 4 rotates to contact the first induction switch 41, the pressing drive connecting piece 6 rotates downward, until the pressing assembly presses the upper welding assembly 200 down in place. At this time, the handle 103 is in the lowered state and contacts the tensioning operation switch 40, and the first structure 50 further moves away from the lifting connecting piece 5. The tensioning wheel assembly is in the lowered state, the upper welding assembly 200 is pressed down in place, the upper and lower welding plates cooperate to tightly press the packing belt, and the welding drive motor 203 starts welding.

[0057] (e)Reset After the welding drive motor 203 finishes working, the motor 3 rotates in the first direction, the rotating fitting 4 rotates to contact the second induction switch 42, and the first structure 50 returns to the state of (c). At this time, the tensioning wheel assembly is lowered, and the pressing assembly and the upper welding assembly 200 are lifted and reset by the reset lifting mechanism 201, and the handle is in the lowered state and contacts the tensioning operation switch 40.

[0058] (f)Lift the tensioning wheel to pick up the belt The same as the state of (b).

[0059] (g)Return to the initial state The same as the state of (a).

[0060] Unless otherwise specified, in the present invention, if there are terms such as "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for exemplary illustration and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood by combining the drawings and according to the specific situation.

[0061] Unless otherwise clearly defined and limited, in the present invention, if there are terms such as "set", "clamped" and "connected", they should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific situation.

[0062] The above are only specific embodiments of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present invention are covered by the protection scope of the present invention.

Claims

1. A portable strapping machine, comprising a tension wheel assembly, an upper welding assembly, a shaft and a base. The tension wheel assembly is rotatably mounted on the base through the shaft, and a tension wheel is provided in the tension wheel assembly; characterized in that The portable baler also includes a lifting and pressing power and a control component. The control component is provided with an induction switch. The control component controls the start or stop of the lifting and pressing power and the forward or reverse rotation. The portable baler is also provided with a lifting and lowering assembly. The lifting and pressing power outputs power through a first transmission mechanism, and drives the tensioning wheel assembly to rotate the lifting and pressing assembly to press down the upper welding assembly at different stages. The first transmission mechanism is also connected to a matching piece corresponding to the induction switch, and the lifting and pressing power is simultaneously used as the driving power of the matching piece.

2. The portable packing machine according to claim 1, characterized in that The control component is provided with a first sensing switch and a second sensing switch, and a mating piece for mating with the first sensing switch and the second sensing switch, wherein the mating piece is a rotating mating piece, and the first sensing switch and the second sensing switch are arranged along the rotation path of the rotating mating piece, and the first sensing switch is used to stop the lifting and pressing power when the lifting and pressing power is rotated in the first direction to drive the tensioning wheel to be lifted into place, and to stop the lifting and pressing power when the lifting and pressing power is rotated in the second direction to drive the upper welding component to be pressed into place, and the second sensing switch is used to stop the second direction rotation of the lifting and pressing power when the tensioning wheel descends from the upper lifting position to the initial position, and to stop the first direction rotation of the lifting and pressing power when the upper welding component is lifted into place.

3. The portable packing machine according to claim 2, characterized in that The control assembly is also provided with a tensioning working switch and a welding working switch, which are respectively used to start the lifting and pressing power to rotate in the first direction when the tensioning wheel assembly needs to be lifted, and to start the lifting and pressing power to rotate in the second direction when the upper welding assembly needs to be pressed down.

4. The portable strapping machine according to claim 2, characterized in that The rotating matching member is connected to the lifting and pressing power through a first transmission mechanism.

5. A portable strapping machine according to claim 1, characterized in that The portable baler is provided with a lifting connecting piece, and the lifting connecting piece is connected to the tensioning wheel assembly through a connecting structure. The lifting connecting piece is unidirectionally connected to the lifting and pressing power. When the lifting and pressing power rotates in a first direction to drive the tensioning wheel assembly to be lifted, it is drivingly connected to the lifting connecting piece, and when the lifting and pressing power rotates in a second direction, it is disconnected from the lifting connecting piece.

6. A portable bundling machine according to claim 1, characterized in that The first transmission mechanism adopts a gear meshing connection mechanism, whose first gear is connected to the lifting and pressing power, and its second gear is connected to the first gear and rotates in the opposite direction to the first gear. The matching part and the pressing drive connecting part used to press the pressing assembly downward rotate synchronously with the second gear and in the same direction, and the first structure used to lift the tensioning wheel assembly rotates synchronously with the first gear and in the same direction.

7. The portable strapping machine according to claim 5, wherein The first transmission mechanism adopts a gear meshing connection mechanism, whose first gear is connected to the lifting and pressing power, and its second gear is connected to the first gear and rotates in the opposite direction to the first gear. The matching part and the power output structure for pressing the pressing component are connected to the rotating shaft of the second gear and rotate synchronously with the second gear in the same direction. The first structure that is unidirectionally connected to the lifting connection member is installed on the first gear.

8. The portable strapping machine according to claim 5, wherein The lifting connector is a hook with a curved arm.

9. A portable strapping machine according to claim 5 or 8, characterized in that The induction switch is arranged on a fixed base, and a second structure for limiting and supporting the lifting connecting piece when the tensioning wheel is lifted to the extreme position is arranged on the fixed base. The lifting connecting piece is connected with an elastic member and is elastically supported, and can adaptively maintain its position when the lifting connecting piece contacts and disengages from the first structure for supporting and limiting the lifting connecting piece.

10. A hand-held packing machine according to claim 9, characterized in that The lifting connecting piece is rotatably connected and installed, and the elastic member is arranged between the lifting connecting piece and its connecting base member.

11. A portable strapping machine according to claim 5, characterized in that The lifting and pressing power is fixed on the first side of the base, the first transmission mechanism is located on the second side of the base, and the machine cover is located on the second side of the base; The tensioning wheel assembly is located on the first side of the base, the lifting connecting piece is located on the second side of the base and is rotatably connected with the machine cover, and an elastic member is arranged between the lifting connecting piece and the machine cover to be elastically supported; the upper welding assembly, the pressing assembly, and the pressing driving connecting piece for pressing the pressing assembly are located on the first side of the base, and the machine cover and the tensioning wheel assembly are rotatably installed on the base through the shaft and rotate synchronously.

12. A portable packing machine according to claim 11, characterized in that The shaft has shaft sections on the first side and the second side of the base respectively, the tensioning wheel assembly and the machine cover are respectively connected with the shaft section on the first side and the shaft section on the second side of the shaft, the tensioning wheel and the tensioning driving motor are connected together through a second transmission mechanism and can rotate synchronously with the shaft as the fulcrum, and the tensioning driving motor is located on the second side of the base and is fixedly connected with the machine cover.

13. A portable strapping machine according to claim 3, characterized in that The hand-held strapping machine is provided with a handle for operating the tensioning working switch. The handle is rotatably connected with the fixed base and is connected with a return spring.

14. A portable strapping machine according to claim 13, characterized in that The tensioning working switch is a microswitch, which is set to be in the first state when the handle is lifted, and the lifting and pressing power is started to rotate in the first direction. When the handle is lowered from the lifted state, the lifting and pressing power rotates in the second direction opposite to the first direction.

15. A portable strapping machine according to claim 1, wherein The hand-held strapping machine is further provided with a first reset mechanism, which drives the tensioning wheel assembly and the components rotating synchronously with the tensioning wheel assembly around the shaft to reset downward.

16. A portable packing machine as claimed in claim 1, wherein The pressing assembly is rotatably connected with the base. The pressing assembly includes a rotating frame, the rotating frame is rotatably connected with the base, a pressing member supported by an elastic mechanism is arranged on the rotating frame, and a component cooperating with the pressing driving connecting piece is arranged on the rotating frame; The component cooperating with the pressing driving connecting piece is a roller, the pressing driving connecting piece adopts a rotating cam block, and a positioning concave arc structure cooperating with the roller is arranged at the end of the rotating cam block; The pressing assembly includes a bolt, the bolt head is located at the lower end as the pressing member, the bolt passes through the rotating frame and is slidably connected with the rotating frame, and an elastic mechanism for adjusting the force value by a nut screwed on the bolt is arranged between the rotating frame and the bolt head; The pressing member is provided with a spherical shape to cooperate with the top surface of the upper welding assembly; The pressing assembly is configured with a reset and lifting mechanism.

17. Automatic control method for lifting the tension pulley and pressing down the welding assembly, characterized in that Including the following steps: (a) Initial state The handle (103) is in the lowered state and contacts the tensioning working switch (40). The rotating fitting (4) contacts the second induction switch (42), and the lifting connecting piece (5) disengages from the first structure (50). At this time, the tensioning wheel assembly is in the original position, and the pressing-down assembly and the upper welding assembly (200) are in the lifted state. (b) The tensioning wheel (2) is lifted to feed the tape The handle (103) is lifted to disengage from the tensioning working switch (40). The motor (3) rotates in the first direction. The rotating fitting (4) rotates to contact the first induction switch (41). The first structure (50) drives the lifting connecting piece (5) to lift, and the pressing-down driving connecting piece (6) further rotates upward. At this time, the tensioning wheel assembly is lifted, and the pressing-down assembly and the upper welding assembly (200) are in the lifted state. (c) The tape is tensioned The handle (103) is lowered. At this time, the motor (3) rotates in the second direction. The rotating fitting (4) rotates to contact the second induction switch (42), and the lifting connecting piece (5) disengages from the first structure (50). At this time, the tensioning wheel assembly is lowered, the tensioning wheel driving motor (21) is started to tension the tape, the pressing-down driving connecting piece (6) rotates downward to the (a) initial state, the pressing-down assembly and the upper welding assembly (200) are in the lifted state, and the handle contacts the tensioning working switch (40) after being lowered. (d) Enter the welding state After the tape is tensioned, the welding work is carried out. The welding working switch is started. The motor (3) rotates in the second direction. The rotating fitting (4) rotates to contact the first induction switch (41). The pressing-down driving connecting piece (6) rotates downward until the pressing-down assembly presses down the upper welding assembly (200) in place. At this time, the handle (103) is in the lowered state and contacts the tensioning working switch (40), and the first structure (50) further moves away from the lifting connecting piece (5). The tensioning wheel assembly is in the lowered state, the upper welding assembly (200) is pressed down in place, the upper and lower welding plates cooperate to tightly press the packing tape, and the welding driving motor (203) starts welding. (e) Reset After the welding driving motor (203) finishes working, the motor (3) rotates in the first direction. The rotating fitting (4) rotates to contact the second induction switch (42), and the first structure (50) returns to the (c) state. At this time, the tensioning wheel assembly is lowered, and the pressing-down assembly and the upper welding assembly (200) are lifted and reset by the reset lifting mechanism (201). The handle is in the lowered state and contacts the tensioning working switch (40). (f) The tensioning wheel is lifted to take the tape The same as the (b) state. (g) Return to the initial state The same as the (a) state.

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