A fusion lower-pressing mechanism and a hand-held packing machine

Abstract

The utility model provides a kind of welding down-pressing mechanism and portable packing machine, welding down-pressing mechanism includes motor of driving lifting movement, transmission outer thread column, lifting component and elastic down-pressing mechanism, motor is connected by speed reducer and transmission outer thread column, lifting component and the transmission outer thread column are threadedly connected and can be driven lifting, the elastic down-pressing mechanism is arranged between lifting component and upper welding assembly.The utility model separates welding down-pressing mechanism and welding mechanism in mechanical combination aspect, and uses independent driving motor and speed reducer mechanism to drive lifting component installed by thread connection, accurately controls down-pressing speed and is suitable for self-locking, simultaneously, lifting component can be accurately controlled down-pressing distance by the connecting mode of screw nut, to provide optimum welding condition for different packing belt.And, the mechanism of the utility model does not exist and welding mechanism mechanical cooperation, can be independently disassembled as module, help to improve installation efficiency and own quality.

Description

Technical Field

[0001] This utility model relates to a portable packing machine, specifically to a welding device used in it. Background Technology

[0002] In handheld strapping machines, PET or PP strapping tape is used to bundle products. The machine heats the two parts of the tape to be bonded together through frictional heating. This requires pressing the two parts of the tape downwards with the upper welding assembly, and then driving the upper welding assembly to perform a welding motion to achieve frictional heat bonding of the tape. Previously, a single motor was often used for both the downward pressure drive and the melting motion. This structure, using a linkage mechanism to achieve both the downward pressure drive and the locked downward pressure state, requires a transition structure for precise engagement and disengagement with the welding mechanism. Furthermore, it is difficult to adjust and control the downward pressure motion to adapt to different types of tape.

[0003] Some methods use two different motors to drive the pressing motion and the welding motion respectively, but they still use a linkage structure to achieve the pressing drive and locking of the pressing state, making it difficult to adjust and control the pressing motion. Utility Model Content

[0004] The purpose of this invention is to provide a welding pressing mechanism that is simple and reliable in structure and can easily control the pressing motion. To this end, this invention adopts the following technical solution:

[0005] A welding pressing mechanism is applied to a handheld packing machine. The welding device of the handheld packing machine includes an upper welding component mounting base and an upper welding component. The upper welding component is movably connected to the upper welding component mounting base. The welding pressing mechanism includes a motor for driving lifting and lowering motion, a transmission external threaded column, a lifting component, and an elastic pressing mechanism. The motor is connected to the transmission external threaded column through a reduction mechanism. The lifting component is threadedly connected to the transmission external threaded column and can be driven to lift and lower. The elastic pressing mechanism is provided between the lifting component and the upper welding component.

[0006] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0007] The welding pressing mechanism is provided with a mounting base, which has a vertical corresponding part and a horizontal corresponding part. The motor and the reduction mechanism are provided in the horizontal corresponding part. The transmission external thread column is axially positioned and rotatably installed in the vertical corresponding part. The vertical corresponding part is provided with a guide hole for the lifting component.

[0008] The deceleration mechanism consists of a multi-stage reduction gear set sequentially along the length of the corresponding transverse portion, and a corresponding gear mounting groove is provided on the corresponding transverse portion.

[0009] The welding pressing mechanism is provided with a mounting base, on which an upper sensor and a lower sensor are provided to control the upper and lower limits of the lifting component. The lifting component is provided with a sensing element that cooperates with the upper and lower sensors.

[0010] The output shaft of the motor is parallel to the axis of the external threaded column of the transmission. The motor is located at one end of the horizontal corresponding part, and the vertical corresponding part is connected to the other end of the horizontal corresponding part.

[0011] The lower end of the lifting component is provided with a mounting cavity for the elastic pressing mechanism, and a support part for the elastic pressing mechanism is provided in the mounting cavity.

[0012] The external thread of the transmission external thread column is set to the thread corresponding to the lead screw; the lifting component and the transmission external thread column form a self-locking lifting structure.

[0013] The transmission external threaded column is rotatably mounted in the vertical corresponding part by being axially positioned by the lower axial limiting structure and the upper axial limiting structure. A lower limiting boss is provided in the vertical corresponding part. The transmission external threaded column has a shoulder, and a limiting component is provided on the shoulder. The limiting component on the shoulder cooperates with the lower end face of the lower limiting boss to serve as the lower axial limiting structure of the transmission external threaded column.

[0014] This utility model also provides a hand-held packing machine employing the above-mentioned welding and pressing mechanism, which easily achieves the pressing motion and control through a simple and reliable solution. Therefore, this utility model adopts the following technical solution:

[0015] A portable packing machine includes a tensioning mechanism and a welding device. The portable packing machine is characterized by the welding pressing mechanism, which has an L-shaped mounting base fixedly connected to the base of the portable packing machine. The corresponding lateral portion of the welding mechanism is located on the same side as the tensioning mechanism relative to the upper welding assembly. The drive motor of the upper welding assembly in the welding device is located on the other side, and the corresponding lateral portion is located above the tensioning mechanism.

[0016] Furthermore, the welding and pressing mechanism forms an installation module and is fixedly installed via its mounting base and the base of the hand-held packing machine.

[0017] By adopting the technical solution of this utility model, the welding pressing mechanism and the welding mechanism are separated in terms of mechanical connection. An independent drive motor and reduction mechanism drive the lifting component, which is installed via a threaded connection. This allows for precise control of the pressing speed and is suitable for self-locking. Simultaneously, the pressing distance of the lifting component can be precisely controlled through a screw and nut connection, providing the most suitable welding conditions for different packing straps. Furthermore, since the mechanism of this utility model does not have mechanical cooperation with the welding mechanism, it can be independently assembled and disassembled as a module, which helps improve installation efficiency and its own quality. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of an embodiment of the present utility model.

[0019] Figure 2 This is an exploded view of the structure of an embodiment of the present utility model.

[0020] Figure 3 In this embodiment of the utility model, when not pressed down, the corresponding Figure 2 A cross-sectional view along line AA.

[0021] Figure 4 In this embodiment of the utility model, after being pressed down, the corresponding Figure 2 A cross-sectional view along line AA.

[0022] Figure 5 This is a further exploded view of the structure of the pressing mechanism in the figure.

[0023] Figure 6 This is a schematic diagram of an embodiment of the hand-held packing machine of this utility model. Detailed Implementation

[0024] Referring to the accompanying drawings, the handheld packing machine includes a welding device and a tensioning mechanism 300. The welding device includes a drive motor 200, an upper welding component mounting base 201, and an upper welding component 202. The upper welding component 202 is movably connected to the upper welding component mounting base 201. Reference numeral 203 indicates the lower welding component. In this invention, the tensioning mechanism, the upper welding component, the mounting method of the upper welding component, the welding motion drive structure, and the lower welding component remain unchanged; all these mechanisms can utilize existing technologies.

[0025] The welding and pressing mechanism of this utility model is applied to a hand-held packing machine. The welding and pressing mechanism includes a motor 1 for driving lifting and lowering motion, a transmission external threaded column 2, a lifting component 3, and an elastic pressing mechanism 4. The motor 1 is connected to the transmission external threaded column 2 through a reduction mechanism. The lifting component 3 is threadedly connected to the transmission external threaded column 2 and can be driven to lift and lower. The elastic pressing mechanism 4 is provided between the lifting component 3 and the upper welding assembly 202. The welding and pressing mechanism is also provided with a sensing mechanism to control the upward and downward limits of the lifting component 3.

[0026] The welding pressing mechanism is provided with a mounting base 5, which has a vertical corresponding part 51 and a horizontal corresponding part 52. The motor 1 and the reduction mechanism are provided in the horizontal corresponding part. The transmission external threaded column 2 is rotatably mounted in the vertical corresponding part 51 with axial positioning. The vertical corresponding part 51 is provided with a guide hole 510 for the lifting component. As shown in the figure, an upper limit boss 511 and a lower limit boss 512 are provided in the vertical corresponding part. The transmission external threaded column 2 has a shoulder 20 and a limiting component 21 provided on the shoulder 20. The limiting component can be a bearing. The limiting component on the shoulder cooperates with the lower end face of the lower limit boss 512 to have sufficient axial positioning force to resist the pressing reaction force, while also satisfying the rotation of the transmission external threaded column 2.

[0027] The deceleration mechanism consists of a multi-stage reduction gear set 7 (one pair of gears constitutes one stage, and a total of five reduction gear sets are provided in this embodiment) arranged sequentially along the length direction of the corresponding transverse portion 52. A corresponding gear mounting groove 521 is provided on the corresponding transverse portion 52, and a cover plate 53 is provided on the top of the transverse portion to hide the gear set of the deceleration mechanism.

[0028] The vertical corresponding portion 51 is provided with an upper sensor 62 and a lower sensor 62 as the sensing mechanism. The lifting component 3 is provided with a sensing element 31 that cooperates with the upper and lower sensors. The vertical corresponding portion 51 can be provided with a groove 513 for the sensing element 31 to move up and down. Due to the use of a reduction mechanism composed of multi-stage gears and a transmission method in which the external threaded column 2 is threadedly connected to the lifting component 3, the effect of instantaneous stopping and instantaneous self-locking during rotation can be achieved. The lifting component 3 becomes a self-locking lifting component with adjustable position. The lifting component 3 and the transmission external threaded column 2 form a self-locking lifting structure with adjustable position of the lifting component. In addition, the transmission external threaded column 2 can also be set as the thread corresponding to the lead screw. The connection structure of the lead screw and nut can also easily realize the self-locking of the nut at any position of the lead screw, further improving the self-locking force. The lowering height can be easily adjusted by finely adjusting the positions of the upper and lower sensors or by setting a height-adjustable component on the sensing element 31 to cooperate with the lower sensor 62. This allows for self-locking at any set lowering limit position without loosening, ensuring sufficient lowering force. The force value of the elastic lowering mechanism can also be controlled by adjusting the lowering stroke.

[0029] The output shaft of the motor 1 is axially parallel to the external threaded column 2 of the transmission. The motor 1 is located at one end of the horizontal corresponding part 52, and the vertical corresponding part 51 is connected to the other end of the horizontal corresponding part.

[0030] The lower end of the lifting component 3 is provided with a mounting cavity 33 for the elastic pressing mechanism, and a support part 32 for the elastic pressing mechanism is provided in the mounting cavity. The elastic pressing mechanism 4 can be a helical spring, disc spring, or other mechanism with elastic elements.

[0031] Although this invention separates the welding pressing mechanism from the welding mechanism in terms of mechanical connection, and there is no transitional connection structure between them, as can be seen above, the mounting base 5 has an L-shaped structure. This L-shaped structure allows it to be interspersed with the tensioning side structure of the hand-held packing machine, making the structure compact. As shown in the figure, the L-shaped structure is fixedly connected to the base of the hand-held packing machine. Relative to the upper welding assembly 202, the lateral corresponding portion 52 is located on the same side as the tensioning mechanism 300, and the drive motor 200 of the upper welding assembly in the welding device is located on the other side. The lateral corresponding portion 52 is located above the tensioning mechanism 300.

[0032] Through the technical solution of the present invention, the welding pressing mechanism can form an installation module with the mounting base 5 as the base, and is fixedly installed by the mounting base 5 and the base 100 of the hand-held packing machine, which helps to improve installation efficiency and its own quality.

[0033] Unless otherwise specified, in this utility model, terms such as "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and "axial" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.

[0034] Unless otherwise expressly specified and limited, the terms "set," "clamped," and "connected" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] The above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the protection scope of the present utility model.

Claims

1. A welding and pressing mechanism applied to a handheld packing machine, wherein the welding device of the handheld packing machine includes an upper welding component mounting base and an upper welding component, the upper welding component being movably connected to the upper welding component mounting base, characterized in that, The welding pressing mechanism includes a motor for driving lifting and lowering motion, a transmission external threaded column, a lifting component, and an elastic pressing mechanism. The motor is connected to the transmission external threaded column through a reduction mechanism. The lifting component is threadedly connected to the transmission external threaded column and can be driven to lift and lower. The elastic pressing mechanism is provided between the lifting component and the upper welding assembly.

2. The welding pressing mechanism as described in claim 1, characterized in that, The welding pressing mechanism is provided with a mounting base, which has a vertical corresponding part and a horizontal corresponding part. The motor and the reduction mechanism are provided in the horizontal corresponding part. The transmission external thread column is axially positioned and rotatably installed in the vertical corresponding part. The vertical corresponding part is provided with a guide hole for the lifting component.

3. The welding pressing mechanism as described in claim 2, characterized in that, The deceleration mechanism consists of a multi-stage reduction gear set sequentially along the length of the corresponding transverse portion, and a corresponding gear mounting groove is provided on the corresponding transverse portion.

4. The welding pressing mechanism as described in claim 1, characterized in that, The welding pressing mechanism is provided with a mounting base, on which an upper sensor and a lower sensor are provided to control the upper and lower limits of the lifting component. The lifting component is provided with a sensing element that cooperates with the upper and lower sensors.

5. A welding pressing mechanism as described in claim 2, characterized in that, The output shaft of the motor is parallel to the axis of the external threaded column of the transmission. The motor is located at one end of the horizontal corresponding part, and the vertical corresponding part is connected to the other end of the horizontal corresponding part.

6. The welding pressing mechanism as described in claim 1, characterized in that, The lower end of the lifting component is provided with a mounting cavity for the elastic pressing mechanism, and a support part for the elastic pressing mechanism is provided in the mounting cavity.

7. The welding pressing mechanism as described in claim 1, characterized in that, The external thread of the transmission external thread column is set to the thread corresponding to the lead screw; the lifting component and the transmission external thread column form a self-locking lifting structure.

8. The welding pressing mechanism as described in claim 2, characterized in that, The transmission external threaded column is rotatably mounted in the vertical corresponding part by being axially positioned by the lower axial limiting structure and the upper axial limiting structure. A lower limiting boss is provided in the vertical corresponding part. The transmission external threaded column has a shoulder, and a limiting component is provided on the shoulder. The limiting component on the shoulder cooperates with the lower end face of the lower limiting boss to serve as the lower axial limiting structure of the transmission external threaded column.

9. A handheld packing machine, comprising a tensioning mechanism and a welding device, characterized in that, The handheld packing machine is equipped with a welding pressing mechanism as described in claims 1, 2, 3, 4, 5, 6, 7 or 8. The welding pressing mechanism is equipped with a mounting base, which is L-shaped and fixedly connected to the base of the handheld packing machine. Relative to the upper welding assembly, the lateral corresponding part is located on the same side as the tensioning mechanism. The drive motor of the upper welding assembly in the welding device is located on the other side, wherein the lateral corresponding part is located above the tensioning mechanism.

10. A handheld packing machine as described in claim 9, characterized in that, The welding and pressing mechanism forms an installation module and is fixedly installed through its mounting base and the base of the hand-held packing machine.

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