A sealing and cutting power conveying structure for a packaging machine

Abstract

This utility model relates to a sealing machine, and more particularly to a sealing and cutting power transmission structure for a packaging machine, solving the problem of power transmission for sealing and cutting in packaging machines. It includes a centrally hollowed-out main body, within which a motor is housed. The motor's output shaft extends to the outer wall of the main body to form a power end. At least two camshafts are also provided on the outer wall of the main body, passing through the main body and rotatably mounted. Each camshaft has an eccentric wheel within the main body, and a driven sprocket is mounted on the camshaft. A power sprocket is mounted on the power end. The power sprocket and the driven sprocket rotate synchronously via chain drive, transmitting the output power of the laterally mounted motor to two guide shafts equipped with multiple eccentric wheels via a chain. This method transforms the previously single-point concentrated power output into a multi-point balanced output, solving the problem of requiring a high-power motor and a heavy support plate, thereby reducing the machine's weight and expanding its usable space.

Description

Technical Field

[0001] This utility model relates to a sealing machine, and more particularly to a sealing and cutting power transmission structure for a packaging machine. Background Technology

[0002] The sealing and cutting power transmission structure of a packaging machine is a specially designed layout to fully utilize the available space inside the main unit, reduce the overall mechanical size, and lighten the overall weight. Traditional products use high-power motors with heavy support plates to provide strong power output. However, this approach results in uneven output, affecting the stability of the point of application during transmission and causing strong vibrations. There is a lack of products more suitable for applications requiring frequent movement, as well as those that improve durability and enhance stability and reliability. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a sealing and cutting power conveying structure for a packaging machine.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a sealing and cutting power conveying structure for a packaging machine, comprising a centrally hollowed-out main body, a motor disposed within the main body, the motor output shaft extending to the outer wall of the main body to form a power end, at least two camshafts disposed on the outer wall of the main body, the camshafts penetrating the main body and being rotatably assembled, an eccentric wheel disposed within the main body on the camshaft, a driven sprocket disposed on the camshaft, a power sprocket disposed on the power end, the power sprocket and the driven sprocket rotating synchronously via chain drive, a tensioning sprocket disposed on the outer wall of the main body between the power sprocket and the driven sprocket, and a lower pressure plate disposed below the eccentric wheel in the main body, the lower pressure plate elastically abutting against the eccentric wheel.

[0005] The main body consists of a left support plate, a right support plate, and several profile beams, with the left support plate and the right support plate fixed to each end of the profile beams respectively.

[0006] The camshaft and the eccentric wheel are fitted with a clearance, and the outer ring of the eccentric wheel is fitted with a centerless needle roller bearing.

[0007] The lower pressure plate is mounted on the profile beam by means of pin screws, and the pin screws are equipped with pin springs.

[0008] The eccentric wheel is integrally connected to the lower pressure plate below.

[0009] The beneficial effects of this utility model are as follows: The sealing and cutting power transmission of the packaging machine provided by this utility model transmits the output power of the side-mounted motor to two guide shafts equipped with multiple eccentric wheels via a chain, thereby evenly distributing it downwards. This method, which transforms the previously concentrated single-point power output into a multi-point balanced output, solves the problem of requiring a high-power motor and a heavy support plate, thus reducing the weight of the machine and expanding its usable space. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the lower pressure plate structure of this utility model. Detailed Implementation

[0012] like Figures 1-2As shown, a sealing and cutting power transmission structure for a packaging machine includes a centrally hollowed-out main body 1. A motor 5 is housed within the main body 1, and the output shaft of the motor 5 extends to the outer wall of the main body 1 to form a power end. At least two camshafts 6 are also provided on the outer wall of the main body 1, passing through the main body 1 and rotatably mounted. An eccentric wheel 8 is provided within the main body 1 on each camshaft 6, and a driven sprocket 9 is provided on the camshaft 6. A power sprocket 10 is provided on the power end, and the power sprocket 10 and the driven sprocket 9 rotate synchronously via chain drive. A tensioning sprocket 15 is also provided on the outer wall of the main body 1, positioned between the power sprocket 10 and the driven sprocket 9. A lower pressure plate 14 is provided below the eccentric wheel 8 on the main body 1, and the lower pressure plate 14 elastically abuts against the eccentric wheel 8. A low-power wiper motor 5 is laterally mounted on the right support plate 3 through mounting holes, replacing the previously common high-power geared motor 5, reducing machine weight and expanding usable space. The low-power wiper motor 5, combined with the force-distributing mechanical structure of the eccentric wheel 8, contributes to this design. The force dispersed by the eccentric wheel 8 is then concentrated and transmitted to the working point through the lower pressure plate 14. The left support plate 2 and the right support plate 3 are connected and fixed by multiple profile beams 4, thus forming the main body 1 of the host. The wiper motor 5 is mounted laterally on the right support plate 3 through the mounting holes on the right support plate 3. The output shaft of the wiper motor 5 extends outward through the motor shaft hole on the right support plate 3, and a drive sprocket 10 is mounted and fixed on the output shaft of the motor 5. Two camshafts 6 are fixed in the middle through the bearing holes on the left support plate 2 and the right support plate 3. Two eccentric wheels 8 are mounted and fixed on each camshaft 6 with clearance fit. The outer ring of the eccentric wheel 8 is fitted with a centerless needle roller bearing 7. A driven sprocket 9 is installed at one end of the camshaft 6 extending out of the right support plate 3; the drive sprocket 10 and the driven sprocket 9 are connected by a chain. In order to achieve tension adjustment, a tension sprocket 15 is also installed in the middle. To ensure that the force output by the eccentric wheel 8 is evenly distributed downwards, a lower pressure plate 14 is installed below the eccentric wheel 8. The front and rear eccentric wheels 8 share the same lower pressure plate 14. The lower pressure plate 14 is fixed to the profile beam 4 by pins and screws 11. The pins and screws 11 and the profile beam 4 have a clearance fit, allowing the lower pressure plate 14 room to move downwards with the movement of the eccentric wheel 8. To ensure that the lower pressure plate 14 always remains in close contact with the eccentric wheel 8 for force transmission, a pin spring is fitted over the pins and screws 11.

[0013] The main body 1 consists of a left support plate 2, a right support plate 3, and several profile beams 4. The two ends of each profile beam 4 are fixed to the left support plate 2 and the right support plate 3, respectively. The main body 1 of the host machine is formed by connecting and fixing the left support plate 2 and the right support plate 3 through multiple profile beams 4, resulting in a simple structure. The camshaft 6 and the eccentric wheel 8 have a clearance fit, increasing the allowance for elastic floating and adapting to assembly tolerances. A centerless needle roller bearing 7 is fitted around the outer ring of the eccentric wheel 8. Depending on the application, a bearing without an inner ring or a needle roller and cage assembly can be selected. In this case, the journal surface and the housing bore surface that mate with the bearing directly serve as the inner and outer rolling surfaces of the bearing. To ensure the load capacity and operating performance are the same as those of bearings with raceways, the hardness, machining accuracy, and surface quality of the raceway surface of the shaft or housing bore should be similar to those of the bearing raceways. This type of bearing can only withstand radial loads; this design improves the radial load capacity and service life. The lower pressure plate 14 is fixedly mounted on the profile beam 4 by a pin screw 11, and a pin spring 12 is provided on the pin screw 11. This is one embodiment; the pin spring 12 is sleeved on the pin screw 11 and elastically abuts against it. The pin screw 11 serves to provide basic positioning and prevent the pin spring 12 from disengaging. Specifically, the pin screw 11 may have a protruding part that blocks and limits the pin spring 12; this is a mature technical method. The eccentric wheel 8 is integrally connected to the lower pressure plate 14 below, enhancing balance and facilitating stable and even use.

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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, they should not be construed as limitations on this utility model. At the same time, the basic principles, main features, and advantages of this utility model have been shown and described above, which should be understood by those skilled in the art.

Claims

1. A sealing and cutting power transmission structure of a packaging machine, characterized by, The device includes a centrally hollowed-out main body, within which a motor is installed. The motor's output shaft extends to the outer wall of the main body to form a power end. At least two camshafts are also provided on the outer wall of the main body, passing through the main body and rotatably mounted. An eccentric wheel is provided on the camshaft within the main body, and a driven sprocket is provided on the camshaft. A power sprocket is provided on the power end, and the power sprocket and the driven sprocket rotate synchronously via chain drive. A tension sprocket is also provided on the outer wall of the main body between the power sprocket and the driven sprocket. A lower pressure plate is provided below the eccentric wheel on the main body, and the lower pressure plate elastically abuts against the eccentric wheel.

2. A sealing and cutting power transmission structure of a packaging machine according to claim 1, characterized in that, The main body consists of a left support plate, a right support plate, and several profile beams, with the left support plate and the right support plate fixed to each end of the profile beams respectively.

3. A cutting power transmission structure of a packaging machine according to claim 1 or 2, characterized in that, The camshaft and the eccentric wheel are fitted with a clearance, and the outer ring of the eccentric wheel is fitted with a centerless needle roller bearing.

4. The sealing and cutting power transmission structure of a packaging machine according to claim 2, wherein The lower pressure plate is mounted on the profile beam by means of pin screws, and the pin screws are equipped with pin springs.

5. The sealing and cutting power transmission structure of a packaging machine according to claim 1, characterized in that, The eccentric wheel is integrally connected to the lower pressure plate below.

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