Portable packing machine

Abstract

The present invention discloses a handheld strapping machine and a welding mechanism. By means of a single control module and an electric motor, lifting and lowering of a welding upper tooth plate and control of a spacing between a tightening wheel and a tightening tooth plate can be realized, so that control is simple and convenient, operation requires less effort, and problems existing in the prior art can be solved. The handheld strapping machine of the present invention comprises an electric motor, a welding module, and a tightening module, and further comprises a control module, a first transmission unit, and a second transmission unit; the electric motor operates according to a control signal of the control module; the electric motor controls lifting and lowering of the welding upper tooth plate of the welding module via the first transmission unit; and the electric motor controls a spacing between the tightening wheel and the tightening tooth plate in the tightening module via the second transmission unit.

Description

TECHNICAL FIELD

[0001] The present invention relates to the field of strapping machines, and in particular to a handheld strapping machine.BACKGROUND ART

[0002] A handheld strapping machine is a portable strapping device that is used to be conveniently carried to a relevant work site for bundling items. Patent No. CN212333061U discloses a portable strapping machine capable of preventing misoperation. This strapping machine comprises control structures such as a tightening wheel button 3, a strap-rubbing button 10, and a handle 13. Due to the inclusion of a relatively large number of control structures, not only is the difficulty of user operation increased, but also, when the user holds the strapping machine, the user needs to be distracted to operate different control structures, thereby increasing the risk of erroneous operation. In addition, in the handheld strapping machines of the prior art, a large handle is used to forcibly open a rocker lever, which is relatively labor-intensive to operate. The rocker lever is an important component for tightening the strapping band.

[0003] In a handheld strapping machine, a welding mechanism connects the head end and the tail end of the strapping band by means of heating. After the welding mechanism connects the strapping band, it is necessary to lift a welding upper tooth plate so that the connected strapping band can be taken out. In existing welding mechanisms, the lifting of the welding upper tooth plate is controlled by an additionally provided long handle or an electronic button, which increases the number of operating steps.

[0004] The above-described technical defects existing in the prior art have become a major technical problem that urgently needs to be solved by those skilled in the art.SUMMARY OF THE INVENTION

[0005] The present invention discloses a handheld strapping machine that utilizes a control module and an electric motor to facilitate the lifting and lowering of the welding upper tooth plate, as well as to control the spacing between the tightening wheel and the tightening tooth plate. This design not only offers simple and convenient control but also requires less effort for operation, effectively addressing the issues present in existing technology.

[0006] The handheld strapping machine provided by the present invention comprises an electric motor, a welding module, and a tightening module, and further comprises a control module, a first transmission unit, and a second transmission unit;

[0007] The electric motor operates according to a control signal of the control module;

[0008] The electric motor controls the lifting and lowering of the welding upper tooth plate of the welding module via the first transmission unit.

[0009] The electric motor controls a spacing between the tightening wheel and the tightening tooth plate in the tightening module via the second transmission unit.

[0010] Preferably, the control module comprises an operating handle with a reset design and a control switch, wherein the control switch is triggered by actuating the operating handle.

[0011] Preferably, the handheld strapping machine is composed of a working area, a handle operation area, and a power supply area that are sequentially connected; the operating handle is arranged in the handle operation area, or is arranged in the working area and extends to a position of the handle operation area. Preferably, the operating handle is arranged below a handle in the handle operation area, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle is held.

[0012] Preferably, the operating handle comprises an actuating portion, a rotating portion, and a control portion, wherein the control portion is used to trigger the control switch; the rotating portion and the control portion are arranged in the working area via an avoidance groove formed in the working area, and the actuating portion extends from the avoidance groove to below the handle; a torsion spring for controlling reset of the operating handle is provided on the rotating portion; and the control switch is an inductive switch.

[0013] Preferably, a third transmission unit is further provided between the electric motor and the second transmission unit; the electric motor controls locking and releasing of an output wheel of a tightening motor in the tightening module via the third transmission unit, wherein the output wheel is connected to the tightening wheel through a planetary reduction structure.

[0014] Preferably, the first transmission unit comprises a first transmission component driven by the electric motor and a cam, the first transmission component and the cam rotating synchronously; the welding module comprises a toggle rod assembly, the toggle rod assembly comprising a rotatable toggle rod and a connecting member; one end of the toggle rod is provided with a protrusion cooperating with the cam and is connected to the welding upper tooth plate via the connecting member, and the other end is rotated to be connected to a welding motor of the welding module and is driven by the welding motor.

[0015] Preferably, the second transmission unit comprises a second transmission component, and a pawl and a tightening tooth plate driving block provided at two ends of the second transmission component, wherein the tightening tooth plate driving block rotates synchronously with the second transmission component, and the pawl is movably mounted on the second transmission component; the tightening tooth plate driving block directly or indirectly drives the tightening tooth plate via a transition member.

[0016] Preferably, the third transmission unit comprises a third transmission component and a pressing block rotating synchronously with the third transmission component; the electric motor drives the third transmission component and drives the second transmission component via the third transmission component; an output wheel of the tightening motor is a ratchet cooperating with the pawl; one end of the pawl is provided with a rotating arm cooperating with the pressing block, and the other end is provided with a claw arm cooperating with the ratchet, wherein one side of the claw arm is provided with a protrusion cooperating with the ratchet and the other side is provided with a spring; and the pressing block drives the pawl to rotate during rotation thereof so that the claw arm is disengaged from the ratchet.

[0017] Preferably, the first transmission component, the second transmission component, and the third transmission component are all gears; a driving gear is provided on the electric motor, and the first transmission component, the driving gear, the third transmission component, and the second transmission component are sequentially arranged in contact; a welding driving wheel is provided on the welding motor, and toggle teeth cooperating with the welding driving wheel are provided on the toggle rod.

[0018] The handheld strapping machine provided by the present invention comprises an electric motor, a welding module, and a tightening module, and it comprises a control module, a first transmission unit, and a second transmission unit; the electric motor operates according to a control signal of the control module; the electric motor controls lifting and lowering of a welding upper tooth plate of the welding module via the first transmission unit; and the electric motor controls a spacing between a tightening wheel and a tightening tooth plate in the tightening module via the second transmission unit. By means of a single control module and an electric motor, the lifting and lowering of the welding upper tooth plate and the control of the spacing between the tightening wheel and the tightening tooth plate can be realized, and the handheld strapping machine of the present invention is not only simple and convenient to control, but also requires less effort for operation, and is capable of solving the problems existing in the prior art.

[0019] According to a second aspect of the present invention, the present invention discloses a welding mechanism, which adopts a design of a control motor and a welding motor, and realizes lifting of a welding upper tooth plate by driving a toggle rod, and thus does not require additional operations of the control motor to lift the welding upper tooth plate, and is capable of solving the defects existing in the prior art. The welding mechanism provided by the present invention is used for a handheld strapping machine and is connected to a control motor in the handheld strapping machine, and it comprises a toggle rod assembly and a welding motor assembly; the toggle rod assembly comprises a rotatable toggle rod and a connecting member, wherein one end of the toggle rod is driven by the control motor and is connected to the welding upper tooth plate via the connecting member, and the other end is rotated to be connected to a welding motor of the welding motor assembly and is driven by the welding motor.

[0020] Preferably, the welding motor assembly comprises a welding motor and a welding driving wheel mounted on the welding motor; toggle teeth cooperating with the welding driving wheel are provided on the toggle rod.

[0021] Preferably, the toggle rod has an L-shaped structure; a horizontal portion of the L-shaped structure is connected to the welding upper tooth plate via the connecting member, and a vertical portion thereof is provided with toggle teeth; after the toggle rod rotates to be in contact with the welding driving wheel, the welding upper tooth plate, the connecting member, the horizontal portion of the toggle rod, the vertical portion of the toggle rod, and the welding driving wheel are sequentially connected.

[0022] Preferably, two ends of the connecting member are provided with movable bases, and the two movable bases are respectively connected to the horizontal portion and the welding upper tooth plate.

[0023] Preferably, the control motor drives the toggle rod via the first transmission unit; the first transmission unit comprises a first transmission component driven by the control motor and a cam, the first transmission component and the cam rotating synchronously; one end of the toggle rod is provided with a protrusion cooperating with the cam, and the other end cooperates with the welding motor. Preferably, a driving gear is provided on the control motor, and the first transmission component is a gear cooperating with the driving gear; the first transmission component and the cam are coaxially arranged.

[0024] Preferably, the control motor operates according to a control signal sent by a control module provided in the handheld strapping machine. Preferably, the control module comprises an operating handle with a reset design and a control switch, wherein the control switch is triggered by actuating the operating handle.

[0025] Preferably, the handheld strapping machine is composed of a working area, a handle operation area, and a power supply area that are sequentially connected; the operating handle is arranged in the handle operation area, or is arranged in the working area and extends to a position of the handle operation area, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle is held.

[0026] Preferably, the operating handle comprises an actuating portion, a rotating portion, and a control portion, wherein the control portion is used to trigger the control switch; the rotating portion and the control portion are arranged in the working area via an avoidance groove formed in the working area, and the actuating portion extends from the avoidance groove to below the handle; a torsion spring for controlling reset of the operating handle is provided on the rotating portion; and the control switch is an inductive switch.

[0027] The welding mechanism provided by the present invention is used for a handheld strapping machine and is connected to a control motor in the handheld strapping machine, and it comprises a toggle rod assembly and a welding motor assembly; the toggle rod assembly comprises a rotatable toggle rod and a connecting member, wherein one end of the toggle rod is driven by the control motor and is connected to the welding upper tooth plate via the connecting member, and the other end is rotated to be connected to a welding motor of the welding motor assembly and is driven by the welding motor. By adopting a design including a control motor and a welding motor, and realizing lifting of the welding upper tooth plate by driving the toggle rod, the welding mechanism of the present invention does not require additional operations and allows the welding upper tooth plate to be lifted by the control motor, thereby being capable of solving the defects existing in the prior art.BRIEF DESCRIPTION OF THE DRAWINGS

[0028] FIG. 1 is a front structural view of a handheld strapping machine according to Embodiment 1 of the present invention. FIG. 2 is a perspective view of the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 3 is one internal structural view of the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 4 is another internal structural view of the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 5 is another internal structural view of the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 6 is another internal structural view of the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 7 is a transmission structure view of the electric motor 1 in the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 8 is a structural view of the welding module 2 in the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 9 is a structural view of the electric motor 1 and the control module 4 in the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 10 is an exploded structural view of the electric motor 1 and the control module 4 in the handheld strapping machine according to Embodiment 1 of the present invention. FIG. 11 is a front structural view of a handheld strapping machine according to Embodiment 2 of the present invention. FIG. 12 is a perspective view of the handheld strapping machine according to Embodiment 2 of the present invention. FIG. 13 is one internal structural view of the handheld strapping machine including a welding mechanism according to Embodiment 2 of the present invention. FIG. 14 is another internal structural view of the handheld strapping machine including the welding mechanism according to Embodiment 2 of the present invention. FIG. 15 is a structural view of the welding mechanism without a control motor 1b according to Embodiment 2 of the present invention. FIG. 16 is a transmission structure view of the control motor 1b and the first transmission unit 7b in the welding mechanism according to Embodiment 2 of the present invention. FIG. 17 is a structural view of the control motor 1b and the control module 8b in the welding mechanism according to Embodiment 2 of the present invention. FIG. 18 is an exploded structural view of the control motor 1b and the control module 8b in the welding mechanism according to Embodiment 2 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTSEmbodiment 1, with reference to FIGS. 1-10.

[0029] The present invention discloses a handheld strapping machine. By means of a single control module and an electric motor, lifting and lowering of a welding upper tooth plate and control of a spacing between a tightening wheel and a tightening tooth plate can be realized, so that the handheld strapping machine is not only simple and convenient to control, but also requires less effort for operation, and is capable of solving the problems existing in the prior art.

[0030] The technical solutions in the embodiments of the present invention are described clearly and in detail below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are merely part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art on the basis of the embodiments of the present invention without making any creative effort shall fall within the protection scope of the present invention. Please refer to FIGS. 1-10, a handheld strapping machine according to the present invention is illustrated, which comprises an electric motor 1, a welding module 2, and a tightening module 3, and it comprises a control module 4, a first transmission unit 5, and a second transmission unit 6; the electric motor 1 operates according to a control signal of the control module 4; the electric motor 1 controls lifting and lowering of a welding upper tooth plate 21 of the welding module 2 via the first transmission unit 5; the electric motor 1 controls a spacing between a tightening wheel 31 and a tightening tooth plate 32 in the tightening module 3 via the second transmission unit 6.

[0031] In the embodiment of the present invention, lifting and lowering of the welding upper tooth plate 21 and control of a spacing between the tightening wheel 31 and the tightening tooth plate 32 can be realized by a single electric motor 1 via the first transmission unit 5 and the second transmission unit 6. Specifically, after the electric motor 1 receives a control signal from the control module 4, the electric motor 1 starts to operate, and controls lifting and lowering of the welding upper tooth plate 21 of the welding module 2 via the first transmission unit 5, and controls the spacing between the tightening wheel 31 and the tightening tooth plate 32 in the tightening module 3 via the second transmission unit 6. It should be noted that the first transmission unit 5 and the second transmission unit 6 are both connected to the electric motor 1, and may specifically be connected to a driving wheel on a rotating shaft of the electric motor 1, which is not limited herein. The control module 4 may specifically be a handle, an electronic button, a touch switch, or the like. Here, it should be particularly pointed out that, in the present invention, the lifting and lowering of the welding upper tooth plate 21 controlled by the electric motor 1 of the welding module 2 does not necessarily require the electric motor 1 to participate in the entire lifting or lowering process of the welding upper tooth plate 21, but may be a lifting or lowering process completed in cooperation with other motors. The specific lifting and lowering process will be described in detail later.

[0032] It should be noted that the electric motor 1 of the present invention may be a servo motor, a steering motor, or the like. In the present embodiment, a steering motor is preferred, which is not limited herein.

[0033] Preferably, the control module 4 comprises an operating handle 41 with a reset design and a control switch 42, wherein the control switch 42 is triggered by actuating the operating handle 41.

[0034] In the present invention, the control module 4 is preferably a combination of the operating handle 41 with a reset design and the control switch 42, wherein the operating handle 41 has the advantage of being convenient to operate and can greatly improve an operating feel of a user.

[0035] Preferably, the handheld strapping machine is composed of a working area 001, a handle operation area 002, and a power supply area 003 that are sequentially connected; the operating handle 41 is arranged in the handle operation area 002, or is arranged in the working area 001 and extends to a position of the handle operation area 002.

[0036] Preferably, the operating handle 41 is arranged below a handle 0021 in the handle operation area 002, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle 0021 is held.

[0037] It should be noted that, when the control module 4 comprises the operating handle 41, the operating handle 41 may be a relatively small and short handle. After such a small handle is arranged below the handle 0021, when the handheld strapping machine is lifted for operation, it is very convenient for a user to operate the operating handle 41 with an index finger and / or a middle finger, thereby achieving a good operating feel. This configuration is completely different from existing large handles that require the handheld strapping machine to be put down or require to be forcibly actuated by another hand.

[0038] Preferably, the operating handle 41 comprises an actuating portion 411, a rotating portion 412, and a control portion 413, wherein the control portion 413 is used to trigger the control switch 42; the rotating portion 412 and the control portion 413 are arranged in the working area 001 via an avoidance groove 0011 formed in the working area 001, and the actuating portion 411 extends from the avoidance groove 0011 to below the handle 0021; a torsion spring 414 for controlling reset of the operating handle 41 is provided on the rotating portion 412; and the control switch 42 is an inductive switch.

[0039] It should be noted that, when the index finger and / or a middle finger are used, generally, the index finger pulls the actuating portion 411, the operating handle 41 rotates, and after the control portion 413 leaves the control switch 42, the control switch 42 sends a control signal, and the electric motor 1 operates according to the control signal.

[0040] Preferably, a third transmission unit 7 is further provided between the electric motor 1 and the second transmission unit 6; the electric motor 1 controls locking and releasing of an output wheel of a tightening motor 33 in the tightening module 3 via the third transmission unit 7, wherein the output wheel is connected to the tightening wheel 31 through a planetary reduction structure.

[0041] First, it should be noted that, in the embodiments of the present invention, locking of the output wheel does not mean limiting the output wheel to be unable to rotate, but rather limiting the output wheel to rotate only in one direction. Therefore, after the output wheel is released, the output wheel is able to rotate in both forward and reverse directions. In addition, the third transmission unit 7 of the present invention is applicable to a handheld strapping machine adopting a planetary reduction structure, rather than to a structure adopting a worm-and-gear transmission. In a handheld strapping machine adopting the planetary reduction structure, a single electric motor 1 of the present invention can realize three-fold control, namely lifting and lowering of the welding upper tooth plate 21, locking and releasing of the output wheel of the tightening motor 33, and control of the spacing between the tightening wheel 31 and the tightening tooth plate 32. In brief, by means of the control module 4, more directly, by actuating the operating handle 41 that is convenient for operation by a user's index finger and / or middle finger, the three-fold control can be realized. This operating mode has the advantages of being labor-saving, simple and easy to use, and having a strong operating feel, and is more in line with the needs of actual operators.

[0042] It must be pointed out that the above-mentioned three-fold control may be carried out in a synchronous manner, or may be carried out in a sequential manner. When the sequential manner is adopted, the following order is generally used. That is, after the actuating portion 411 is pulled, first, rotation of the cam causes the welding upper tooth plate 21 to be lifted; next, the output wheel of the tightening motor 33 is released, so that the output wheel can rotate in forward and reverse directions, that is, the tightening wheel 31 can rotate freely at this time; finally, the spacing between the tightening wheel 31 and the tightening tooth plate 32 is increased, and after the tightening wheel 31 is disengaged from the tightening tooth plate 32, the welded strapping band can be removed.

[0043] Preferably, the first transmission unit 5 comprises a first transmission component 51 driven by the electric motor 1 and a cam 52, the first transmission component 51 and the cam 52 rotating synchronously; the welding module 2 comprises a toggle rod assembly, the toggle rod assembly comprising a rotatable toggle rod 22 and a connecting member 23; one end of the toggle rod 22 is provided with a protrusion 221 cooperating with the cam 52 and is connected to the welding upper tooth plate 21 via the connecting member 23, and the other end is rotated to be connected to a welding motor 24 of the welding module 2 and is driven by the welding motor 24.

[0044] In the embodiment of the present invention, during rotation of the first transmission component 51, the cam 52 is driven to rotate. During rotation of the cam 52, the toggle rod 22 is pressed downward, that is, the toggle rod 22 rotates. During rotation of the toggle rod 22, one end thereof gradually approaches the welding motor 24 until coming into contact with the welding motor 24, and the welding motor 24 drives the toggle rod 22 to further rotate. Meanwhile, the toggle rod 22 pulls the welding upper tooth plate 21 to be lifted via the connecting member 23. In general, the first transmission component 51 mainly serves to connect the toggle rod 22 with the welding motor 24, while the welding motor 24 serves to output power for lifting the welding upper tooth plate 21.

[0045] Here, the process in which the electric motor 1 controls lifting and lowering of the welding upper tooth plate 21 of the welding module 2 via the first transmission unit 5 is described in detail as follows: when the welding upper tooth plate 21 needs to be lifted, the function of the electric motor 1 is to drive the toggle rod 22 to rotate via the cam 52 so as to cooperate with the welding motor 24, and the toggle rod 22 is then driven by the welding motor 24 to continue rotating until the welding upper tooth plate 21 rises to an appropriate position; when the operating handle 41 is released and again abuts against the control switch 42, that is, when the electric motor 1 receives the control signal again, the electric motor 1 controls the cam 52 to rotate and give way to the toggle rod 22, so that the welding upper tooth plate 21 will not be obstructed during lowering, wherein the lowering of the welding upper tooth plate 21 may be achieved by its own gravity, or may be driven by the welding motor 24, or by other manners. That is, the electric motor 1 of the present invention controls lifting and lowering of the welding upper tooth plate 21 of the welding module 2 via the first transmission unit 5, which may merely control an initial process of lifting and lowering of the welding upper tooth plate 21 rather than the entire process, and is not limited herein.

[0046] Preferably, the second transmission unit 6 comprises a second transmission component 61, and a pawl 62 and a tightening tooth plate driving block 63 provided at two ends of the second transmission component 61, wherein the tightening tooth plate driving block 63 rotates synchronously with the second transmission component 61, and the pawl 62 is movably mounted on the second transmission component 61; the tightening tooth plate driving block 63 directly or indirectly drives the tightening tooth plate 32 via a transition member 64. In the embodiment of the present invention, during a process in which the electric motor 1 drives the second transmission component 61, the tightening tooth plate driving block 63 is driven to rotate synchronously. During rotation of the tightening tooth plate driving block 63, the tightening tooth plate 32 is driven to rotate directly or indirectly via the transition member 64. It should be noted that the transition member 64 may be a mechanical component having a transmission function, such as a gear ring or a gear, which is not limited herein. In addition, during rotation of the second transmission component 61, the pawl 62 does not rotate correspondingly, but is driven to rotate by the third transmission unit 7, which will be described in detail below.

[0047] Preferably, the third transmission unit 7 comprises a third transmission component 71 and a pressing block 72 rotating synchronously with the third transmission component 71; the electric motor 1 drives the third transmission component 71 and drives the second transmission component 61 via the third transmission component 71; the tightening module 3 further comprises a ratchet 34 rotating synchronously with the output wheel, the ratchet 34 cooperating with the pawl 62; one end of the pawl 62 is provided with a rotating arm 621 cooperating with the pressing block 72, and the other end is provided with a claw arm 622 cooperating with the ratchet 34, wherein one side of the claw arm 622 is provided with a protrusion 6221 cooperating with the ratchet 34 and the other side is provided with a spring 6222; and during rotation of the pressing block 72, the pressing block 72 drives the pawl 62 to rotate such that the claw arm 622 is disengaged from the ratchet 34.

[0048] It should be noted that the electric motor 1 drives the second transmission component 61 via the third transmission component 71. During rotation of the third transmission component 71, the pressing block 72 is driven to rotate synchronously. When the pressing block 72 rotates, a downward pressing force is applied to the rotating arm 621, and the pawl 62 rotates under the downward pressing force, thereby driving the claw arm 622 to rotate. During rotation of the claw arm 622, the spring is compressed and the claw arm 622 gradually disengages from a range of the ratchet 34. After the claw arm 622 is completely disengaged from the ratchet 34, the entire process is completed. At this time, the ratchet 34 is able to rotate freely. Since the output wheel rotates synchronously with the ratchet 34, the output wheel is also able to rotate freely, thereby completing releasing of the output wheel of the tightening motor 33. In addition, after the electric motor 1 stops outputting power, the pawl 62 rotates in a reverse direction under an action of the spring 6222, and the output wheel of the tightening motor 33 is locked again, so that only unidirectional rotation can be realized.

[0049] Preferably, the first transmission component 51, the second transmission component 61, and the third transmission component 71 are all gears; a driving gear 11 is provided on the electric motor 1, and the first transmission component 51, the driving gear 11, the third transmission component 71, and the second transmission component 61 are sequentially arranged in contact; a welding driving wheel 25 is provided on the welding motor 24, and toggle teeth 222 cooperating with the welding driving wheel 25 are provided on the toggle rod 22.

[0050] It should be noted that the first transmission component 51, the second transmission component 61, and the third transmission component 71 may all be gears, and the first transmission component 51, the driving gear 11, the third transmission component 71, and the second transmission component 61 are sequentially arranged in contact. That is, the driving gear 11 is capable of simultaneously driving the first transmission component 51, the second transmission component 61, and the third transmission component 71 to rotate. In addition, after the toggle teeth 222 come into tooth engagement with the welding driving wheel 25, the welding driving wheel 25 is able to drive the toggle rod 22 to rotate.

[0051] The handheld strapping machine provided by the present invention comprises an electric motor 1, a welding module 2, and a tightening module 3, and it comprises a control module 4, a first transmission unit 5, and a second transmission unit 6; the electric motor 1 operates according to a control signal of the control module 4; the electric motor 1 controls lifting and lowering of a welding upper tooth plate 21 of the welding module 2 via the first transmission unit 5; and the electric motor 1 controls a spacing between a tightening wheel 31 and a tightening tooth plate 32 in the tightening module 3 via the second transmission unit 6. By means of realizing lifting and lowering of the welding upper tooth plate 21 and controlling the spacing between the tightening wheel 31 and the tightening tooth plate 32 through a single control module 4 and an electric motor 1, the handheld strapping machine of the present invention is not only simple and convenient to control, but also requires less effort for operation, and is capable of solving the problems existing in the prior art.Embodiment 2, with reference to FIGS. 11-18.

[0052] The present invention discloses a welding mechanism, which adopts a design including a control motor and a welding motor, and realizes lifting of a welding upper tooth plate by driving a toggle rod. The welding upper tooth plate can be lifted by the control motor without requiring additional operations, thereby being capable of solving the defects existing in the prior art. The technical solutions in the embodiments of the present invention are described clearly and in detail below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are merely part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art on the basis of the embodiments of the present invention without making any creative effort shall fall within the protection scope of the present invention. Please refer to FIG. 11, a welding mechanism according to the present invention is illustrated, which is used for a handheld strapping machine and is connected to a control motor 1b in the handheld strapping machine, and it comprises a toggle rod assembly and a welding motor assembly; the toggle rod assembly comprises a rotatable toggle rod 2b and a connecting member 3b, wherein one end of the toggle rod 2b is driven by the control motor 1b and is connected to a welding upper tooth plate 4b via the connecting member 3b, and the other end is rotated to be connected to a welding motor 5b of the welding motor assembly and is driven by the welding motor 5b.

[0053] In the present invention, the control motor 1b plays a guiding and controlling role. When the welding upper tooth plate 4b needs to be lifted, the control motor 1b drives the toggle rod 2b to rotate. During rotation of the toggle rod 2b, the welding upper tooth plate 4b is driven to rise via the connecting member 3b. After one end of the toggle rod 2b rotates to be connected to the welding motor 5b of the welding motor assembly, power is provided by the welding motor 5b to continuously drive the toggle rod 2b to rotate, that is, to continue driving the welding upper tooth plate 4b to rise to a set position; after the control motor 1b completes lifting of the welding upper tooth plate 4b, the control motor 1b cuts off output power to the toggle rod 2b, and the control motor 1b may control the welding upper tooth plate 4b to descend by reverse rotation, which is not limited herein.

[0054] It should be noted that the control motor 1b of the present invention may be a servo motor, a steering motor, or the like. In the present embodiment, a steering motor is preferred, which is not limited herein.

[0055] Preferably, the welding motor assembly comprises a welding motor 5b and a welding driving wheel 6b mounted on the welding motor 5b; toggle teeth 21b cooperating with the welding driving wheel 6b are provided on the toggle rod 2b.

[0056] It should be noted that, after the toggle rod 2b rotates until the toggle teeth 21b are brought into meshing engagement with the welding driving wheel 6b, power for continued rotation is provided by the welding motor 5b. At this time, the control motor 1b no longer drives the toggle rod 2b.

[0057] Preferably, the toggle rod 2b has an L-shaped structure; a horizontal portion of the L-shaped structure is connected to the welding upper tooth plate 4b via the connecting member 3b, and a vertical portion thereof is provided with toggle teeth 21b; after the toggle rod 2b rotates to be in contact with the welding driving wheel 6b, the welding upper tooth plate 4b, the connecting member 3b, the horizontal portion of the toggle rod 2b, the vertical portion of the toggle rod 2b, and the welding driving wheel 6b are sequentially connected.

[0058] In the embodiment of the present invention, the welding upper tooth plate 4b, the connecting member 3b, the horizontal portion of the toggle rod 2b, the vertical portion of the toggle rod 2b, and the welding driving wheel 6b are sequentially connected. Therefore, when the toggle rod 2b is driven by the control motor 1b to rotate, the horizontal portion of the toggle rod 2b pulls the welding upper tooth plate 4b to be lifted, and the vertical portion of the toggle rod 2b continuously approaches the welding driving wheel 6b. After the vertical portion comes into meshing engagement with the welding driving wheel 6b, power for continued rotation is provided by the welding motor 5b.

[0059] Preferably, two ends of the connecting member 3b are provided with movable bases, and the two movable bases are respectively connected to the horizontal portion and the welding upper tooth plate 4b.

[0060] Preferably, the control motor 1b drives the toggle rod 2b via a first transmission unit 7b; the first transmission unit 7b comprises a first transmission component 71b driven by the control motor 1b and a cam 72b, the first transmission component 71b and the cam 72b rotating synchronously; one end of the toggle rod 2b is provided with a protrusion 22b cooperating with the cam 72b, and the other end cooperates with the welding motor 5b.

[0061] In the embodiment of the present invention, the control motor 1b can control the toggle rod 2b via the first transmission unit 7b. Specifically, the first transmission component 71b driven by the control motor 1b rotates. Since the first transmission component 71b rotates synchronously with the cam 72b, the cam 72b rotates simultaneously and abuts against the protrusion 22b. The protrusion 22b is displaced under force, that is, the toggle rod 2b is driven to rotate.

[0062] Preferably, a driving gear 11b is provided on the control motor 1b, and the first transmission component 71b is a gear cooperating with the driving gear 11b; the first transmission component 71b and the cam 72b are coaxially arranged.

[0063] Preferably, the control motor 1b operates according to a control signal sent by a control module 8b provided in the handheld strapping machine.

[0064] It should be noted that the driving gear 11b may not only cooperate with the first transmission component 71b, but may also cooperate with other transmission components simultaneously. If a plurality of transmission components cooperate with the driving gear 11b at the same time, the control motor 1b is capable of realizing multiple functions simultaneously. That is, after receiving a control signal sent by the control module 8b, the control motor 1b can simultaneously or sequentially realize multiple operating steps, which is not limited herein.

[0065] Preferably, the control module 8b comprises an operating handle 81b with a reset design and a control switch 82b, wherein the control switch 81b is triggered by actuating the operating handle 82b.

[0066] In the present invention, the control module 8b is preferably a combination of the operating handle 81b with a reset design and the control switch 82b, wherein the operating handle 81b has the advantage of being convenient to operate and can greatly improve an operating feel of a user.

[0067] Preferably, the handheld strapping machine is composed of a working area 001b, a handle operation area 002b, and a power supply area 003b that are sequentially connected; the operating handle 81b is arranged in the handle operation area 002b, or is arranged in the working area 001b and extends to a position of the handle operation area 002b, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle 0021b is held.

[0068] It should be noted that, when the control module 8b comprises the operating handle 81b, the operating handle 81b may be a relatively small and short handle. After such a small handle is arranged below the handle 0021b, when the handheld strapping machine is lifted for operation, it is very convenient for a user to operate the operating handle 81b with an index finger and / or a middle finger, thereby obtaining a good operating feel. This configuration is completely different from existing large handles that require the handheld strapping machine to be put down or require to be forcibly actuated by another hand.

[0069] Preferably, the operating handle 81b comprises an actuating portion 811b, a rotating portion 812b, and a control portion 813b, wherein the control portion 813b is used to trigger the control switch 82b; the rotating portion 812b and the control portion 813b are arranged in the working area 001b via an avoidance groove 0011b formed in the working area 001b, and the actuating portion 811b extends from the avoidance groove 0011b to below the handle 0021b; a torsion spring 83b for controlling reset of the operating handle 81b is provided on the rotating portion 812b; and the control switch 82b is an inductive switch. It should be noted that, when the index finger and / or a middle finger are used, generally, the index finger pulls the actuating portion 811b, the operating handle 81b rotates, and after the control portion 813b leaves the control switch 82b, the control switch 82b sends a control signal, and the control motor 1b operates according to the control signal.

[0070] The welding mechanism provided by the present invention is used for a handheld strapping machine and is connected to a control motor 1b in the handheld strapping machine, and it comprises a toggle rod assembly and a welding motor assembly; the toggle rod assembly comprises a rotatable toggle rod 2b and a connecting member 3b, wherein one end of the toggle rod 2b is driven by the control motor 1b and is connected to a welding upper tooth plate 4b via the connecting member 3b, and the other end is rotated to be connected to a welding motor 5b of the welding motor assembly and is driven by the welding motor 5b. By adopting a design including the control motor 1b and the welding motor 5b, and realizing lifting of the welding upper tooth plate 4b by driving the toggle rod 2b, the welding mechanism of the present invention does not require additional operations and allows the welding upper tooth plate 4b to be lifted by the control motor 1b, thereby being capable of solving the defects existing in the prior art.

[0071] The handheld strapping machine provided by the present invention has been described in detail above. For those of ordinary skill in the art, various modifications and variations may be made in specific implementation modes and application scopes based on the ideas of the embodiments of the present invention. Therefore, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A handheld strapping machine, comprising an electric motor, a welding module, and a tightening module, characterized in that it comprises a control module, a first transmission unit, and a second transmission unit; the electric motor operates according to a control signal of the control module; the electric motor controls lifting and lowering of a welding upper tooth plate of the welding module via the first transmission unit; and the electric motor controls a spacing between a tightening wheel and a tightening tooth plate in the tightening module via the second transmission unit.

2. The handheld strapping machine according to claim 1, characterized in that the control module comprises an operating handle with a reset design and a control switch, wherein the control switch is triggered by actuating the operating handle.

3. The handheld strapping machine according to claim 2, characterized in that: the handheld strapping machine is composed of a working area, a handle operation area, and a power supply area that are sequentially connected; and the operating handle is arranged in the handle operation area, or is arranged in the working area and extends to a position of the handle operation area.

4. The handheld strapping machine according to claim 3, characterized in that: the operating handle is arranged below a handle in the handle operation area, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle is held.

5. The handheld strapping machine according to claim 4, <b>characterized in that; the operating handle comprises an actuating portion, a rotating portion, and a control portion, wherein the control portion is used to trigger the control switch; the rotating portion and the control portion are arranged in the working area via an avoidance groove formed in the working area, and the actuating portion extends from the avoidance groove to below the handle; a torsion spring for controlling reset of the operating handle is provided on the rotating portion; and the control switch is an inductive switch.

6. The handheld strapping machine according to any one of claims 1 to 5, <b>characterized in that: a third transmission unit is further provided between the electric motor and the second transmission unit; and the electric motor controls locking and releasing of an output wheel of a tightening motor in the tightening module via the third transmission unit, wherein the output wheel is connected to the tightening wheel through a planetary reduction structure.

7. The handheld strapping machine according to claim 6, <b>characterized in that: the first transmission unit comprises a first transmission component driven by the electric motor and a cam, the first transmission component and the cam rotating synchronously; the welding module comprises a toggle rod assembly, the toggle rod assembly comprising a rotatable toggle rod and a connecting member; and one end of the toggle rod is provided with a protrusion cooperating with the cam and is connected to the welding upper tooth plate via the connecting member, and the other end is rotated to be connected to a welding motor of the welding module and is driven by the welding motor.

8. The handheld strapping machine according to claim 7, <b>characterized in that: the second transmission unit comprises a second transmission component, and a pawl and a tightening tooth plate driving block provided at two ends of the second transmission component, wherein the tightening tooth plate driving block rotates synchronously with the second transmission component, and the pawl is movably mounted on the second transmission component; and the tightening tooth plate driving block directly or indirectly drives the tightening tooth plate via a transition member.

9. The handheld strapping machine according to claim 8, <b>characterized in that: the third transmission unit comprises a third transmission component and a pressing block rotating synchronously with the third transmission component; the electric motor drives the third transmission component and drives the second transmission component via the third transmission component; the tightening module further comprises a ratchet rotating synchronously with the output wheel, the ratchet cooperating with the pawl; one end of the pawl is provided with a rotating arm cooperating with the pressing block, and the other end is provided with a claw arm cooperating with the ratchet, wherein one side of the claw arm is provided with a protrusion cooperating with the ratchet and the other side is provided with a spring; and during rotation, the pressing block drives the pawl to rotate such that the claw arm is disengaged from the ratchet.

10. The handheld strapping machine according to claim 9, <b>characterized in that: the first transmission component, the second transmission component, and the third transmission component are all gears; a driving gear is provided on the electric motor, and the first transmission component, the driving gear, the third transmission component, and the second transmission component are sequentially arranged in contact; and a welding driving wheel is provided on the welding motor, and toggle teeth cooperating with the welding driving wheel are provided on the toggle rod.

11. A welding mechanism, used for a handheld strapping machine and connected to a control motor in the handheld strapping machine, <b>characterized in that: it comprises a toggle rod assembly and a welding motor assembly; and the toggle rod assembly comprises a rotatable toggle rod and a connecting member, wherein one end of the toggle rod is driven by the control motor and is connected to a welding upper tooth plate via the connecting member, and the other end is rotated to be connected to a welding motor of the welding motor assembly and is driven by the welding motor.

12. The welding mechanism according to claim 11, <b>characterized in that: the welding motor assembly comprises a welding motor and a welding driving wheel mounted on the welding motor; and toggle teeth cooperating with the welding driving wheel are provided on the toggle rod.

13. The welding mechanism according to claim 12, <b>characterized in that: the toggle rod has an L-shaped structure; a horizontal portion of the L-shaped structure is connected to a welding upper tooth plate via the connecting member, and a vertical portion thereof is provided with toggle teeth; and after the toggle rod rotates to be in contact with the welding driving wheel, the welding upper tooth plate, the connecting member, the horizontal portion of the toggle rod, the vertical portion of the toggle rod, and the welding driving wheel are sequentially connected.

14. The welding mechanism according to claim 13, characterized in that: two ends of the connecting member are provided with movable bases, and the two movable bases are respectively connected to the horizontal portion and the welding upper tooth plate.

15. The welding mechanism according to any one of claims 11 to 14, <b>characterized in that: the control motor drives the toggle rod via a first transmission unit; the first transmission unit comprises a first transmission component driven by the control motor and a cam, the first transmission component and the cam rotating synchronously; and one end of the toggle rod is provided with a protrusion cooperating with the cam, and the other end cooperates with the welding motor.

16. The welding mechanism according to claim 15, <b>characterized in that: a driving gear is provided on the control motor, and the first transmission component is a gear cooperating with the driving gear; and the first transmission component and the cam are coaxially arranged.

17. The welding mechanism according to claim 15, characterized in that: the control motor operates according to a control signal sent by a control module provided in the handheld strapping machine.

18. The welding mechanism according to claim 17, characterized in that: the control module comprises an operating handle with a reset design and a control switch, wherein the control switch is triggered by actuating the operating handle.

19. The welding mechanism according to claim 18, characterized in that: the handheld strapping machine is composed of a working area, a handle operation area, and a power supply area that are sequentially connected; and the operating handle is arranged in the handle operation area, or is arranged in the working area and extends to a position of the handle operation area, and is located at a position suitable for operation by an index finger and / or a middle finger when the handle is held.

20. The welding mechanism according to claim 19, <b>characterized in that: the operating handle comprises an actuating portion, a rotating portion, and a control portion, wherein the control portion is used to trigger the control switch; the rotating portion and the control portion are arranged in the working area via an avoidance groove formed in the working area, and the actuating portion extends from the avoidance groove to below the handle; and a torsion spring for controlling reset of the operating handle is provided on the rotating portion; the control switch is an inductive switch.

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