A welding mechanism

Abstract

The utility model provides a kind of welding mechanism, fixed part is provided above upper welding assembly, it is also provided that down-pressing connecting rod mechanism and push-pull rod, joint shaft is provided in down-pressing connecting rod mechanism and can flex, upper end and fixed part rotationally connect, lower end and upper welding assembly rotationally connect;Push-pull rod first end is connected with down-pressing connecting rod mechanism, second end is connected with undulating rod, so that joint shaft is in the plane one side outside determined by the rotation axis of upper end and the rotation axis of lower end of down-pressing connecting rod mechanism when welding mechanism is in initial state, in welding state, it is in the other side.The utility model can be supported by top fixed fulcrum, to nearly perpendicular to the angle of welding surface Down-pressing upper welding assembly, more efficient, it can be realized in single motor drive and handheld packing machine driven vibration from side, and power requirement of motor can be reduced, impact on undulating rod and motor gear is reduced, help to improve product service life.

Description

Technical Field

[0001] This utility model relates to a welding mechanism for a handheld packing machine. Background Technology

[0002] In handheld electric strapping machines, PET or PP strapping tape is used to bundle products, bonding the two parts of the tape together through frictional heating. The welding mechanism employs a single-motor drive, meaning the upper welding assembly's vibration and downward pressure are driven by the same motor. The upper welding assembly is connected to the drive motor via a linkage mechanism and is driven to move back and forth, achieving welding vibration. The upper welding assembly also has an upwardly angled linkage mechanism whose upper end connects to a wave-shaped rod. This wave-shaped rod is equipped with a sector gear that meshes with a gear on the output shaft of the drive motor, achieving downward pressure on the welding assembly. This structure requires a higher power output from the drive motor to ensure sufficient downward pressure. Utility Model Content

[0003] The purpose of this invention is to provide a welding mechanism that can improve the pressing efficiency of the welding assembly while providing vibration-driven connection from the side. To this end, this invention adopts the following technical solution:

[0004] A welding mechanism includes an upper welding assembly, a motor, and a wave rod. The wave rod is equipped with a sector gear, and the motor is equipped with an output gear. The sector gear and the output gear are capable of engaging and disengaging with each other. The welding mechanism is characterized by having a fixed part above the upper welding assembly, and a lower pressing linkage mechanism. The lower pressing linkage mechanism has a joint shaft that allows it to bend and extend. The upper end of the lower pressing linkage mechanism is rotatably connected to the fixed part, and the lower end is rotatably connected to the upper welding assembly. The welding mechanism also includes a push-pull rod. The first end of the push-pull rod is connected to the lower pressing linkage mechanism, and the second end is connected to the wave rod, and can act on the lower pressing linkage mechanism such that when the welding mechanism is in its initial state, the joint shaft is located on one side of the plane determined by the rotation axis of the upper end and the rotation axis of the lower end of the lower pressing linkage mechanism, and on the other side when the welding mechanism is in the welding state.

[0005] Based on the above technical solutions, the present invention may also adopt the following further technical solutions, or combine these further technical solutions:

[0006] The downward pressing linkage mechanism includes an upper connecting rod and a lower telescopic elastic rod. The upper connecting rod and the lower telescopic elastic rod are rotatably connected by a joint shaft. The upper end of the upper connecting rod is rotatably connected to the fixed part, and the lower end of the lower telescopic elastic rod is rotatably connected to the upper welding assembly.

[0007] The first end of the push-pull rod is connected to the joint shaft.

[0008] The downward linkage mechanism is located on one side of the wave rod, and the wave rod has a reset control part on the side near the downward linkage mechanism; the second end of the push-pull rod is connected to the side of the wave rod near the downward linkage mechanism, and the position of the connection part is set so that when the sector gear rotates to disengage from the output gear, the connection part is located below the reset control part.

[0009] The welding mechanism is mounted on the base. The base extends from above the tensioning mechanism of the handheld packing machine and is provided with a fixing frame. A fixing block is provided on the fixing frame as a fixing part, and a connecting shaft is provided on the fixing block.

[0010] The lower end of the downward pressing linkage mechanism is provided with a downward-opening connecting groove, the upper welding assembly is provided with a connecting shaft, and the connecting groove is mounted on the connecting shaft and rotatably connected to the connecting shaft.

[0011] The lower telescopic elastic link consists of a first link, a second link, and an elastic element. The first link and the second link are slidably connected, and the elastic element is disposed between the first link and the second link.

[0012] The welding mechanism is equipped with a connecting frame, which is fixedly connected to the upper welding assembly and rotatably connected to the base of the handheld packing machine. The connecting frame is connected to an upward return spring. The side of the upper welding tooth block in the upper welding assembly closest to the drive motor is rotatably connected to a driving vibration linkage. This driving vibration linkage is connected to an eccentric mechanism, which is driven to rotate by a motor through a transmission mechanism. This mechanism drives the upper welding assembly to reciprocate.

[0013] The fixing part is located directly above the upper welding assembly.

[0014] The welding mechanism is the welding mechanism in the handheld packing machine. The undulating rod is rotatably connected to the base of the handheld packing machine, and the motor is mounted on the base.

[0015] By adopting the technical solution of this utility model, the present utility model can press the welding component down at an angle almost perpendicular to the welding surface by using the top fixed support point as support, which is more efficient. It can be implemented in handheld packing machines driven by a single motor and driven by vibration from the side, and can reduce the power requirements of the motor, reduce the impact on the oscillating rod and motor gear, and help to improve the service life of the product. Attached Figure Description

[0016] Figure 1 The structural fit of the present invention in its initial state is shown in sectional view.

[0017] Figure 2This is a cross-sectional view showing the structural fit of the present invention in the fusion state.

[0018] Figure 3 This is a sectional view showing the structural fit between the wave rod sector gear and the motor gear when the present invention is reset.

[0019] Figure 4 This is a schematic diagram of an embodiment of the present utility model.

[0020] Figure 5 This is a schematic diagram of the present invention installed on the base of a handheld packing machine according to an embodiment of the present invention.

[0021] Figure 6 This is an exploded view of the structure of an embodiment of the present invention. Detailed Implementation

[0022] Referring to the accompanying drawings, the welding mechanism provided by this utility model is a device in a handheld packing machine used to heat-bond two parts of a strap that need to be bonded by friction heating.

[0023] The welding mechanism includes an upper welding assembly 1, a motor 2, and a vibrating rod 3. The vibrating rod 3 is rotatably connected to the base 100 of the handheld packing machine, with reference numeral 30 indicating its rotating shaft. The motor 2 is mounted on the base 100. The upper welding assembly includes an upper welding tooth block 11 and a fixing structure for mounting the upper welding tooth block 11. The upper welding tooth block 11 can vibrate within the fixing structure, with reference numeral 12 indicating a lower welding tooth block that mates with the upper welding tooth block 11. The motor 2 is equipped with an output gear 21. The vibrating rod 3 is equipped with a sector gear 31, which can be engaged and disengaged with the output gear 21. The sector gear 31 has teeth only within a certain central angle range, such as... Figure 1 , 2 As shown, after the pulsator 3 rotates at a certain angle, it can disengage from the output gear of the motor. Reference numeral 200 indicates the fused packing strap.

[0024] The welding mechanism has a fixing part above the upper welding component 1. In this embodiment, preferably, the original three-dimensional shape of the handheld packing machine can be used. The base 100 extends from above the installation position of the tensioning mechanism of the handheld packing machine to set a fixing frame 101 and a fixing block 102 is set on the fixing frame 101 as a fixing part. An upper connecting shaft 103 is set on the fixing block 102.

[0025] The welding mechanism also includes a downward pressing linkage mechanism 4, which has a joint shaft 40 for bending and extension. The upper end of the downward pressing linkage mechanism 4 is rotatably connected to the fixed part, and the lower end is rotatably connected to the upper welding assembly 1. The welding mechanism also includes a push-pull rod 5, the first end of which is preferably connected to the joint shaft 40 of the downward pressing linkage mechanism, and the second end is connected to the wave rod 3, so that it can act on the downward pressing linkage mechanism 4, such that when the welding mechanism is in the initial state, the joint shaft 40 is outside one side of the plane 400 determined by the rotation axis of the upper end and the rotation axis of the lower end of the downward pressing linkage mechanism (see...). Figure 1 (), when the welding mechanism is in the welding state, it is on the other side.

[0026] The downward pressing linkage mechanism 4 includes an upper connecting rod 41 and a lower telescopic elastic connecting rod. The upper connecting rod 41 and the lower telescopic elastic rod are rotatably connected through a joint shaft 40. The upper end of the upper connecting rod 41 is rotatably connected to the fixed part, and its shaft is the connecting shaft 103. The rotation axis of the upper end is the axis of the connecting shaft 103. The lower end of the lower telescopic elastic rod is rotatably connected to the upper welding assembly 1.

[0027] The downward linkage mechanism 4 is located on one side of the wave rod 3. A reset control part 32 is provided on the side of the wave rod 3 closest to the downward linkage mechanism 4. The second end of the push-pull rod 5 is connected to the side of the wave rod closest to the downward linkage mechanism. The connection part 33 is positioned below the reset control part 32 when the sector gear 31 rotates to disengage from the output gear 21. The control part can be a component 104 driven by a handle or drive mechanism. After the welding operation is completed, the wave rod 3 rotates in the opposite direction by acting on the control part 32, causing the sector gear 31 to re-mesh with the output gear 21.

[0028] The lower telescopic elastic link consists of a first link 42, a second link 43, and an elastic element 44 (compression spring). The first link 42 and the second link 43 are slidably connected, and the elastic element 44 is disposed between the first link 42 and the second link 43. The lower end of the telescopic elastic link (in this embodiment, the second link 43) is provided with a downward-opening connecting groove 45. The upper welding assembly 1 is provided with a connecting shaft 13, and the connecting groove 45 is mounted on the connecting shaft 13 and rotatably connected to the connecting shaft 13. In this embodiment, this achieves a rotatable connection between the lower end of the lower pressing link mechanism 4 and the upper welding assembly 1, with the axis of rotation of the lower end being the axis of the connecting shaft 13.

[0029] The welding mechanism is provided with a connecting frame 6, which is fixedly connected to the upper welding assembly 1 and rotatably connected to the base 100. Reference numeral 60 is its connecting shaft. The connecting frame 6 is connected to an upward-lifting return spring 7. The side of the upper welding tooth block 11 in the upper welding assembly closest to the drive motor 2 is rotatably connected to a driving vibration connecting rod 14. The driving vibration connecting rod 14 is connected to an eccentric mechanism 15, which is driven to rotate by the motor 2 through a transmission mechanism 16. This eccentric mechanism drives the upper welding tooth block 11 to move back and forth (oscillating at a small angle around the joint axis 40 at high frequency) to generate vibration and friction for the packing tape to bond.

[0030] 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.

[0031] 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.

[0032] 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 mechanism, comprising an upper welding assembly, a motor, and a wave-shaped rod, wherein the wave-shaped rod is provided with a sector gear, and the motor is provided with an output gear, the sector gear and the output gear being capable of engaging and disengaging; characterized in that, The welding mechanism has a fixing part above the upper welding assembly. The welding mechanism also has a downward pressing linkage mechanism. The downward pressing linkage mechanism has a joint shaft that can be bent and extended. The upper end of the downward pressing linkage mechanism is rotatably connected to the fixing part, and the lower end is rotatably connected to the upper welding assembly. The welding mechanism also has a push-pull rod. The first end of the push-pull rod is connected to the downward pressing linkage mechanism, and the second end is connected to the wave rod, so that it can act on the downward pressing linkage mechanism. This is such that when the welding mechanism is in the initial state, the joint shaft is outside one side of the plane determined by the rotation axis of the upper end and the rotation axis of the lower end of the downward pressing linkage mechanism, and when the welding mechanism is in the welding state, it is on the other side.

2. The welding mechanism as described in claim 1, characterized in that, The downward pressing linkage mechanism includes an upper connecting rod and a lower telescopic elastic rod. The upper connecting rod and the lower telescopic elastic rod are rotatably connected by a joint shaft. The upper end of the upper connecting rod is rotatably connected to the fixed part, and the lower end of the lower telescopic elastic rod is rotatably connected to the upper welding assembly.

3. The welding mechanism as described in claim 1, characterized in that, The first end of the push-pull rod is connected to the joint shaft.

4. A welding mechanism as described in claim 1, characterized in that, The downward linkage mechanism is located on one side of the wave rod, and the wave rod has a reset control part on the side near the downward linkage mechanism; the second end of the push-pull rod is connected to the side of the wave rod near the downward linkage mechanism, and the position of the connection part is set so that when the sector gear rotates to disengage from the output gear, the connection part is located below the reset control part.

5. A welding mechanism as described in claim 1, characterized in that, The welding mechanism is mounted on the base. The base extends from above the tensioning mechanism of the handheld packing machine and is provided with a fixing frame. A fixing block is provided on the fixing frame as a fixing part, and a connecting shaft is provided on the fixing block.

6. A welding mechanism as described in claim 1, characterized in that, The lower end of the downward pressing linkage mechanism is provided with a downward-opening connecting groove, the upper welding assembly is provided with a connecting shaft, and the connecting groove is mounted on the connecting shaft and rotatably connected to the connecting shaft.

7. A welding mechanism as described in claim 2, characterized in that, The lower telescopic elastic rod consists of a first link, a second link, and an elastic element. The first link and the second link are slidably connected, and the elastic element is disposed between the first link and the second link.

8. A welding mechanism as described in claim 1, characterized in that, The welding mechanism is provided with a connecting frame, which is fixedly connected to the upper welding assembly and rotatably connected to the base of the handheld packing machine. The connecting frame is connected to an upward return spring. The side of the upper welding tooth block in the upper welding assembly closest to the drive motor is rotatably connected to the driving vibration linkage. The driving vibration linkage is connected to an eccentric mechanism, which is driven to rotate by a motor through a transmission mechanism, thereby driving the upper welding assembly to move back and forth.

9. A welding mechanism as described in claim 1, characterized in that, The fixing part is located directly above the upper welding assembly.

10. A welding mechanism as described in claims 1, 2, 3, 4, 5, 6, 7, 8, or 9, characterized in that, The welding mechanism is the welding mechanism in the handheld packing machine. The undulating rod is rotatably connected to the base of the handheld packing machine, and the motor is mounted on the base.

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