An automatic reset device for small transparent packaging double push rods and a packaging machine

Abstract

This utility model discloses an automatic reset device and packaging machine for small transparent packaging with double push rods. It includes a reciprocating shaft with its front end passing through a transmission box. An L-shaped bracket connected to the transmission box is located below the reciprocating shaft. A double push rod is mounted at the rear end of the reciprocating shaft. Each double push rod includes a converging connection end connected to the reciprocating shaft. The converging connection end branches downwards, extending into a pair of parallel and spaced push rods. Below the push rods is a first baffle hinged to a reset spring. The first baffle includes an integrally connected upper baffle and a lower baffle, both with vertical edges perpendicular to the ground under the action of the reset spring. The L-shaped bracket includes a horizontal section and a vertical section. One end of the horizontal section is located between the two push rods, and a second baffle is installed on the horizontal section. When the reset spring fails, the second baffle collides with the vertical edge of the upper baffle, causing the first baffle to reset. This device enables forced reset when the reset spring fails. This structure requires no additional power source, significantly improving the reliability of the equipment.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical transmission devices, specifically relating to an automatic reset device for a small transparent bag double push rod and a packaging machine. Background Technology

[0002] The existing ZB45 packaging machine's small-pack double push rod relies on tension springs for automatic reset. However, in high-frequency operation environments, tension springs are prone to damage due to fatigue, corrosion, or external impacts, causing the push rod to fail to return to its original position. This can lead to jamming and deformation of the cigarette pack, potentially resulting in unpredictable quality problems. Traditional solutions require machine shutdown and manual intervention, reducing production efficiency and posing safety hazards. Therefore, a redundant reset mechanism that does not rely on elastic elements is urgently needed. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this utility model provides an automatic reset device and packaging machine for small transparent packaging double push rods. When the reset elastic element fails, it collides with the first baffle piece set below the double push rod to achieve forced reset. This structure does not require an additional power source and significantly improves the reliability of equipment operation.

[0004] The technical solution provided by this utility model is as follows: This utility model provides a small transparent bag double push rod automatic reset device, including a reciprocating shaft with its front end passing through a transmission box. An L-shaped bracket connected to the transmission box is provided below the reciprocating shaft. A double push rod is mounted at the rear end of the reciprocating shaft. The double push rod includes a converging connection end connected to the reciprocating shaft. The converging connection end branches downwards to extend a pair of parallel and spaced push rods. Below the two push rods is a first baffle piece hinged by a reset spring. The first baffle piece includes an integrally connected upper baffle and a lower baffle. Both the upper and lower baffles have vertical edges perpendicular to the ground under the action of the reset spring. The L-shaped bracket includes a horizontal section and a vertical section. The end of the horizontal section away from the intersection of the horizontal and vertical sections is located at the interval between the two push rods. A second baffle piece is installed on the horizontal section, which, in the event of reset spring failure, collides with the vertical edge of the upper baffle, causing the first baffle piece to reset.

[0005] Furthermore, the second baffle is T-shaped and includes a square plate and a fixed connection part located at the top center of the square plate. The square plate forms an acute angle with the vertical side of the upper baffle, which is in a vertical bottom state, and the angle direction is downward. When the reset spring fails, the two sides of the square plate collide with the vertical side of the upper baffle below the two push rods. The fixed connection part is installed on the horizontal section of the L-shaped bracket.

[0006] Furthermore, the fixed connection part is provided with a waist-shaped mounting hole, and the fixed connection part is connected to the L-shaped bracket by fastening screws passing through the waist-shaped mounting hole and the threaded hole located in the horizontal section of the L-shaped bracket.

[0007] Furthermore, a gasket is provided between the fixed connection part and the horizontal section of the L-shaped bracket.

[0008] Furthermore, the reset spring component includes one or two hook springs, and the bottom outer side of the push rod and the outer side of the upper baffle are provided with fixing parts corresponding to the number of hook springs. The connecting hooks at both ends of the hook springs are respectively connected to the fixing parts located on the bottom outer side and the outer side of the upper baffle.

[0009] Furthermore, the hook spring has a diameter of 5mm and an extension range of 25~40mm.

[0010] Furthermore, the square plate and the fixed connection part are welded structural components made of stainless steel plates.

[0011] This utility model also provides a packaging machine, including the above-mentioned automatic reset device for small transparent packaging double push rods.

[0012] Beneficial effects

[0013] This invention enhances the stability of power transmission through a double-push rod structure and creatively designs a mechanical backup reset mechanism (second baffle) based on collision interference, forming a dual guarantee with the conventional reset of the first baffle. This not only significantly improves the survivability and reliability of the device under extreme conditions such as spring failure, ensuring safe and stable continuous production, but also achieves a compact structure and efficient triggering through ingenious spatial layout, ultimately achieving the core objectives of enhancing equipment durability, reducing maintenance requirements, and improving overall economic benefits.

[0014] This utility model provides an automatic reset device for a small transparent bag double push rod. When the reset elastic element of the small transparent bag double push rod fails, it collides with the first baffle piece set below the double push rod to achieve forced reset. This structure does not require an additional power source and significantly improves the reliability of equipment operation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a small transparent double push rod automatic reset device according to the present invention;

[0016] Figure 2 This is a structural schematic diagram of the second baffle of this utility model (the left figure is a top view of the second baffle, and the right figure is a left side view of the second baffle).

[0017] Explanation of reference numerals in the attached drawings: 1. Reciprocating shaft; 2. Transmission box; 3. Double push rod; 4. L-shaped bracket; 5. First baffle; 6. Hook spring; 7. Second baffle. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0019] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical 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.

[0021] Example 1

[0022] like Figure 1 As shown, this utility model embodiment provides a small transparent bag double push rod automatic reset device, including a reciprocating shaft 1 that passes through a transmission box 2 at the front end, an L-shaped bracket 4 connected to the transmission box 2 at the bottom of the reciprocating shaft 1, and a double push rod 3 assembled at the rear end of the reciprocating shaft 1. The double push rod 3 includes a converging connection end connected to the reciprocating shaft 1, and a pair of parallel and spaced push rods extending downward from the converging connection end. A first baffle 5 is provided below the two push rods and is hinged by a reset spring. The first baffle 5 includes an upper baffle and a lower baffle that are integrally connected. Both the upper baffle and the lower baffle have a vertical edge that is perpendicular to the ground under the action of the reset spring. The L-shaped bracket 4 includes a horizontal section and a vertical section. The end of the horizontal section away from the intersection of the horizontal section and the vertical section is located at the interval between the two push rods, and a second baffle 7 is installed on the horizontal section. When the reset spring fails, the second baffle 7 collides with the vertical edge of the upper baffle, causing the first baffle 5 to reset.

[0023] This invention enhances the stability of power transmission through a double-push rod structure and creatively designs a mechanical backup reset mechanism (second baffle) based on collision interference, forming a dual guarantee with the conventional reset of the first baffle. This not only significantly improves the survivability and reliability of the device under extreme conditions such as spring failure, ensuring safe and stable continuous production, but also achieves a compact structure and efficient triggering through ingenious spatial layout, ultimately achieving the core objectives of enhancing equipment durability, reducing maintenance requirements, and improving overall economic benefits.

[0024] Example 2

[0025] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a small transparent bag double push rod automatic reset device, including a reciprocating shaft 1, a transmission box 2, an L-shaped bracket 4, a double push rod 3, a reset spring, a first baffle 5, and a second baffle 7. The front end of the reciprocating shaft 1 passes through the transmission box, and the L-shaped bracket 4 connected to the transmission box is provided below the reciprocating shaft 1. The rear end of the reciprocating shaft 1 is equipped with a double push rod 3, which includes a converging connection end connected to the reciprocating shaft 1. The converging connection end branches downward and extends out a pair of parallel push rods. The push rods are arranged at intervals. Below the two push rods, there is a first baffle 5 that is hinged by a reset spring. The first baffle 5 includes an upper baffle and a lower baffle that are integrally connected. Both the upper baffle and the lower baffle have a vertical edge that is perpendicular to the ground under the action of the reset spring. The L-shaped bracket 4 includes a horizontal section and a vertical section. The end of the horizontal section that is away from the intersection of the horizontal section and the vertical section is located at the interval between the two push rods. A second baffle 7 is installed on the horizontal section that, when the reset spring fails, collides with the vertical edge of the upper baffle, causing the first baffle 5 to reset.

[0026] This invention utilizes the elasticity of the reset spring to efficiently and automatically pull the first baffle back to its initial position, ensuring the continuity of the action cycle. In extreme cases (such as accidental failure of the reset spring) that prevent the first baffle from automatically returning to its original position, the second baffle installed on the horizontal section of the L-shaped bracket can precisely collide with the vertical edge of the upper baffle of the first baffle. This rigid collision contact generates a direct mechanical interference force, forcibly pushing the first baffle to rotate around its hinge point, thus overcoming jamming or the influence of gravity and reliably returning it to its initial vertical position. This completely avoids system jamming or functional loss due to spring failure, achieving true "fail-safety".

[0027] The horizontal section of the L-shaped bracket of this invention extends to the gap between the two push rods, providing a stable and precisely positioned mounting platform for the second baffle. This ensures that the second baffle and the vertical edge of the upper baffle are on a pre-defined collision interference path, while also maximizing space utilization and making the overall structure compact. The integrated upper and lower baffles and their vertical edges of the first baffle ensure the direct and effective transmission of the reset spring force, and also provide a clear and reliable contact surface for the collision with the second baffle, ensuring that the forced reset action can be triggered efficiently and without error.

[0028] In this embodiment, the second baffle 7 is T-shaped and includes a square plate and a fixed connection part located at the top center of the square plate. The square plate forms an acute angle with the vertical side of the upper baffle in its vertical bottom state, and the angle direction opens downwards. When the reset spring fails, the two sides of the square plate collide with the vertical side of the upper baffle below the two push rods. The fixed connection part is installed on the horizontal section of the L-shaped bracket 4. The design of the square plate provides space for the first baffle to swing normally and ensures that when the first baffle deviates from its vertical position, the vertical side of its upper baffle can reliably contact the inclined surface of the square plate of the second baffle, guiding the first baffle to smoothly return to the correct position. Specifically, the dimensions of the second baffle 7 are as follows: Figure 2 As shown.

[0029] In this embodiment, the fixed connection part is provided with a waist-shaped mounting hole. The fixed connection part is connected to the L-shaped bracket 4 by fastening screws passing through the waist-shaped mounting hole and the threaded hole located in the horizontal section of the L-shaped bracket 4. The waist-shaped mounting hole is designed to adjust the position and ensure installation compatibility.

[0030] In this embodiment, a gasket is also provided between the fixed connection part and the horizontal section of the L-shaped bracket 4.

[0031] In this embodiment, the reset spring component includes one or two hook springs 6. The bottom outer side of the push rod and the outer side of the upper baffle are provided with fixing parts corresponding to the number of hook springs 6. The connecting hooks at both ends of the hook springs 6 are respectively connected to the fixing parts located on the bottom outer side and the outer side of the upper baffle.

[0032] In this embodiment, the hook spring 6 has a diameter of 5mm and an extension range of 25~40mm.

[0033] In this embodiment, the square plate and the fixed connection part are welded structural components made of stainless steel plate.

[0034] Example 3

[0035] This utility model embodiment also provides a packaging machine, including the small transparent bag double push rod automatic reset device described in embodiment 1 or embodiment 2.

[0036] The above description is merely a preferred embodiment of this utility model and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of this utility model, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this utility model. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of this utility model without departing from the scope of the technical solution of this utility model shall fall within the protection scope of this technical solution.

Claims

1. A small transparent bag double push rod automatic reset device, characterized in that, The device includes a reciprocating shaft that passes through the transmission box at the front end. Below the reciprocating shaft is an L-shaped bracket connected to the transmission box. At the rear end of the reciprocating shaft is a double push rod. The double push rod includes a converging connection end connected to the reciprocating shaft. The converging connection end branches downward to extend a pair of parallel and spaced push rods. Below the two push rods is a first baffle piece hinged by a return spring. The first baffle piece includes an integrally connected upper baffle and a lower baffle. Both the upper baffle and the lower baffle have vertical edges that are perpendicular to the ground under the action of the return spring. The L-shaped bracket includes a horizontal section and a vertical section. The end of the horizontal section away from the intersection of the horizontal section and the vertical section is located at the interval between the two push rods. A second baffle piece is installed on the horizontal section. When the return spring fails, it collides with the vertical edge of the upper baffle, causing the first baffle piece to reset.

2. The automatic reset device for small transparent bag double push rods according to claim 1, characterized in that, The second baffle is T-shaped and includes a square plate and a fixed connection part located at the top center of the square plate. The square plate forms an acute angle with the vertical side of the upper baffle, which is in a vertical bottom state, and the angle direction is downward. When the reset spring fails, the two sides of the square plate collide with the vertical side of the upper baffle below the two push rods. The fixed connection part is installed on the horizontal section of the L-shaped bracket.

3. The automatic reset device for small transparent double push rods according to claim 2, characterized in that, The fixed connection part is provided with a waist-shaped mounting hole. The fixed connection part is connected to the L-shaped bracket by fastening screws passing through the waist-shaped mounting hole and the threaded hole located in the horizontal section of the L-shaped bracket.

4. The automatic reset device for the small transparent bag double push rod according to claim 3, characterized in that, A gasket is also provided between the fixed connection part and the horizontal section of the L-shaped bracket.

5. The automatic reset device for a small transparent bag with double push rods according to claim 1, characterized in that, The reset spring component includes one or two hook springs. The bottom outer side of the push rod and the outer side of the upper baffle are provided with fixing parts corresponding to the number of hook springs. The connecting hooks at both ends of the hook springs are respectively connected to the fixing parts located on the bottom outer side and the outer side of the upper baffle.

6. The automatic reset device for the small transparent bag double push rod according to claim 5, characterized in that, The hook spring has a diameter of 5mm and an extension range of 25~40mm.

7. The automatic reset device for the small transparent bag double push rod according to claim 2, characterized in that, The square plate and the fixed connection part are welded structural components made of stainless steel plate.

8. A packaging machine, characterized in that, The device includes the automatic reset device for the small transparent bag double push rod as described in any one of claims 1-7.

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