A dustproof structure for the driven wheel of a packaging clamping and shaping machine

Abstract

This utility model relates to the field of dustproof technology, and provides a dustproof structure for the driven wheel of a packaging clamping and shaping machine. It includes a dustproof cover sleeved on a rotating shaft, which mates with the arc-shaped sealing surfaces at both ends of the rotating shaft. Sealing oil is filled between the dustproof cover and the rotating shaft. Annular grooves for storing the sealing oil are formed on both the arc-shaped sealing surfaces of the dustproof cover and the rotating shaft. Through this dual design of the arc-shaped sealing surface mating and the sealing oil filling the annular grooves, comprehensive protection of the rotating shaft is achieved, effectively reducing the risk of jamming or wear caused by dust intrusion, extending the service life of the rotating shaft, reducing downtime maintenance frequency, and ensuring continuous and stable operation of the production line.

Description

Technical Field

[0001] This utility model relates to the field of dustproof technology, and more specifically, to a dustproof structure for the driven wheel of a packaging clamping and shaping machine. Background Technology

[0002] In PVC packaging production lines, the clamping and shaping machine, as the first step in bag conveying, has the core function of clamping and shaping the bag opening to ensure the stable operation of subsequent sewing and sealing processes. The driven wheel, as a key component of the clamping and shaping machine, directly affects the continuity of the entire production line and the packaging quality. However, the dustproof structure of the driven wheel in existing technologies has significant defects, leading to frequent equipment failures and becoming a bottleneck restricting the improvement of production efficiency and product quality.

[0003] Traditional dust covers, due to their flawed design, suffer from excessive clearance between the dust cover and the driven pulley, and lack of an effective sealing surface. PVC dust can easily penetrate the shaft through these gaps, causing abnormal wear or even damage, which in turn leads to pulley failure, conveyor belt stagnation, and unstable bag operation. This problem not only increases the frequency of equipment downtime for maintenance but also causes quality defects such as bag leakage and insufficient product weight, seriously affecting the stability of the production line and the company's economic benefits. Utility Model Content

[0004] The purpose of this invention is to provide a dustproof structure for the driven wheel of a packaging clamping and shaping machine, which solves the problem of poor sealing effect of existing dustproof structures.

[0005] This utility model is achieved through the following technical solution: a dustproof structure for the driven wheel of a packaging clamping and shaping machine, used to prevent dust from entering the driven wheel. The driven wheel is rotatably connected to a rotating shaft. The dustproof structure includes a dustproof cover sleeved on the rotating shaft. The dustproof cover is respectively engaged with the arc-shaped sealing surfaces at both ends of the rotating shaft. Sealing oil is filled between the dustproof cover and the rotating shaft. Annular grooves for storing sealing oil are provided on the arc-shaped sealing surfaces of the dustproof cover and the rotating shaft.

[0006] Furthermore, the annular groove on the dust cover is arranged opposite to or staggered with the annular groove on the rotating shaft.

[0007] Furthermore, the cross-sectional shape of the annular groove is trapezoidal, semi-circular, or rectangular.

[0008] Furthermore, sealing rings are provided at both ends of the driven wheel, and sealing grooves are provided on the sealing rings. The dust cover is provided with a slot that mates with the sealing rings, and a protruding ring that mates with the sealing groove is provided in the slot.

[0009] Furthermore, annular grooves are respectively formed on the groove wall and bottom of the sealing groove, as well as on the side and top of the convex ring.

[0010] Furthermore, a sealing ring is provided inside the dust cover to seal against the rotating shaft.

[0011] Furthermore, the arc-shaped sealing surface of the dust cover and the arc-shaped sealing surface of the shaft are coated with tungsten carbide or ceramic coating.

[0012] Furthermore, the sealing oil is a silicone-based sealing oil.

[0013] This utility model has at least the following advantages and beneficial effects: Through the dual design of the arc-shaped sealing surface and the sealing oil filling the annular groove, comprehensive protection of the rotating shaft is achieved, effectively reducing the jamming or wear of the rotating shaft caused by dust intrusion, extending the service life of the rotating shaft, reducing the frequency of downtime maintenance, and ensuring the continuous and stable operation of the production line. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the dustproof structure of the driven wheel of a packaging clamping and shaping machine provided by this utility model.

[0015] Figure 2 A cross-sectional view of the dustproof structure of the driven wheel of a packaging clamping and shaping machine provided by this utility model.

[0016] Figure 3 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0017] Reference numerals: 1-rotating shaft, 2-driven wheel, 21-sealing ring, 22-sealing groove, 3-dust cover, 30-annular groove, 31-slot, 32-convex ring, 33-sealing ring. Detailed Implementation

[0018] The specific implementation method is described below with reference to the accompanying drawings.

[0019] Example

[0020] like Figures 1 to 3As shown, this embodiment mainly discloses a dustproof structure for the driven wheel of a packaging clamping and shaping machine, used to prevent dust from entering the driven wheel 2. The driven wheel 2 is rotatably connected to the rotating shaft 1. The dustproof structure includes a dustproof cover 3 sleeved on the rotating shaft 1. The dustproof cover 3 respectively mates with the arc-shaped sealing surfaces at both ends of the rotating shaft 1. Sealing oil is filled between the dustproof cover 3 and the rotating shaft 1. Annular grooves 30 for storing sealing oil are formed on the arc-shaped sealing surfaces of the dustproof cover 3 and the rotating shaft 1. Specifically, the dual design of the arc-shaped sealing surface mating and the sealing oil filling the annular grooves 30 achieves protection for the rotating shaft 1. The arc-shaped seal is a contact mechanical seal, which forms a labyrinthine sealing path through the concave-convex mating, increasing the resistance to dust intrusion; while the sealing oil is a dynamic liquid seal, which uses a viscous fluid to fill the microscopic gaps, further blocking dust. When the driven wheel 2 rotates, the dust cover 3 and the arc-shaped sealing surface of the rotating shaft 1 fit tightly together to form a physical barrier; the sealing oil in the annular groove 30 is evenly distributed under capillary action, covering the contact surface and forming an oil film, which adheres to dust particles and prevents them from entering the interior of the rotating shaft 1. The two work together to achieve a comprehensive dustproof effect of "physical blocking + dynamic interception", effectively reducing the jamming or wear of the rotating shaft 1 caused by dust intrusion, extending the service life of the rotating shaft 1, reducing the frequency of downtime maintenance, and ensuring the continuous and stable operation of the production line.

[0021] Furthermore, in specific implementations, the annular groove 30 of the dust cover 3 provided in the above-mentioned embodiment of the present invention is arranged opposite to or staggered with the annular groove 30 of the rotating shaft 1. Specifically, the arrangement of the grooves directly affects the uniformity of the sealing oil distribution and the dustproof effect. When the two annular grooves 30 are directly opposite each other, the sealing oil forms a continuous oil film on the contact surface, covering a larger area, which is suitable for high dust environments. The staggered groove design can form a multi-level sealing zone. Even if the oil film in one area is damaged, other areas can still maintain the sealing effect, with stronger redundancy. At the same time, the staggered structure can increase the complexity of the dust penetration path and improve the dustproof reliability. The relative arrangement is suitable for scenarios with high processing precision, while the staggered arrangement is more suitable for equipment with large vibration or large assembly tolerance, flexibly adapting to different working conditions.

[0022] Furthermore, in specific implementations, the cross-sectional shape of the annular groove 30 provided in this embodiment of the present invention is trapezoidal, semi-circular, or rectangular. The cross-sectional shape can be flexibly selected according to the equipment speed, dust concentration, and maintenance cycle. For example, a semi-circular shape is preferred for high-speed scenarios (the arc transition reduces the flow resistance of the sealing oil), while a trapezoidal shape is selected for heavy-duty, high-dust environments.

[0023] Furthermore, in a specific implementation, the driven wheel 2 provided in this embodiment of the present invention is provided with sealing rings 21 at both ends, and the sealing rings 21 have sealing grooves 22. The dust cover 3 has a slot 31 that cooperates with the sealing rings 21, and a protruding ring 32 that cooperates with the sealing groove 22 is provided in the slot 31. Specifically, through the cooperation of the sealing rings 21 and the slots 31, and the cooperation of the slots 31 and the protruding rings 32, an arc-shaped sealing barrier is formed to prevent dust from entering from the side.

[0024] Furthermore, in specific implementations, the annular grooves 30 provided in this embodiment of the invention are respectively formed on the groove wall and bottom of the sealing groove 22, as well as on the side and top of the convex ring 32. This forms a multi-stage, multi-fold seal on the arc-shaped sealing surface, improving dustproof reliability.

[0025] Furthermore, in a specific implementation, a sealing ring 33 is provided inside the dust cover 3 provided in this embodiment of the present invention to seal against the rotating shaft 1. Specifically, the sealing ring 33 is made of fluororubber or silicone, and is embedded inside the dust cover 3, with an interference fit to the outer wall of the rotating shaft 1.

[0026] Furthermore, in specific implementations, the arc-shaped sealing surface of the dust cover 3 and the arc-shaped sealing surface of the rotating shaft 1 provided in the above-mentioned embodiment of the present invention are coated with tungsten carbide or ceramic coating to improve the wear resistance and service life of the sealing surface and reduce the frequency of maintenance of the sealing surface.

[0027] Furthermore, in specific implementations, the sealing oil provided in this embodiment of the present invention is a silicone-based sealing oil. Specifically, the silicone-based sealing oil can maintain a stable viscosity within a temperature range of -50℃ to 200℃, and does not chemically react with PVC dust and common lubricants, thus preventing oil deterioration or coking and clogging of the annular groove 30 and gaps.

Claims

1. A dustproof structure for a driven wheel of a packaging clamping and shaping machine, used to prevent dust from entering the driven wheel (2), wherein the driven wheel (2) is rotatably connected to a rotating shaft (1), characterized in that, The dustproof structure includes a dust cover (3) sleeved on the rotating shaft (1). The dust cover (3) is respectively matched with the arc-shaped sealing surfaces at both ends of the rotating shaft (1). Sealing oil is filled between the dust cover (3) and the rotating shaft (1). An annular groove (30) for storing the sealing oil is provided on the arc-shaped sealing surface of the dust cover (3) and the arc-shaped sealing surface of the rotating shaft (1).

2. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The annular groove (30) on the dust cover (3) is arranged opposite to or staggered with the annular groove (30) on the rotating shaft (1).

3. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The cross-sectional shape of the annular groove (30) is trapezoidal, semi-circular, or rectangular.

4. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The driven wheel (2) is provided with sealing rings (21) at both ends. The sealing rings (21) have sealing grooves (22). The dust cover (3) has a slot (31) that cooperates with the sealing rings (21). The slot (31) has a protruding ring (32) that cooperates with the sealing groove (22).

5. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 4, characterized in that, The annular grooves (30) are respectively formed on the groove wall and bottom of the sealing groove (22) and on the side and top of the convex ring (32).

6. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The dust cover (3) is provided with a sealing ring (33) that is in sealing contact with the rotating shaft (1).

7. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The arc-shaped sealing surface of the dust cover (3) and the arc-shaped sealing surface of the rotating shaft (1) are coated with tungsten carbide or ceramic coating.

8. The dustproof structure of the driven wheel of a packaging clamping and shaping machine according to claim 1, characterized in that, The sealing oil is a silicone-based sealing oil.

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