Long life polyurethane roll

Abstract

This utility model discloses a polyurethane roller with a long service life, relating to the field of polyurethane roller technology. The long-service-life polyurethane roller includes a roller main rod, a low-hardness elastic ring, and a fixing ring. A sealing block is provided on the roller main rod; a rubber ring is provided on the low-hardness elastic ring; and a high-hardness polyurethane ring is provided on the roller main rod. This long-service-life polyurethane roller can buffer the high-hardness polyurethane ring when it comes into contact with materials, preventing tearing damage caused by hard contact. This ensures the service life of the high-hardness polyurethane ring. Furthermore, the annular support ring and metal support frame provide internal support for the roller, increasing the overall strength of the roller. The gradual transition of hardness reduces surface stress concentration, improves fatigue life, and increases the practicality of the device.

Description

Technical Field

[0001] This utility model relates to the field of polyurethane roller technology, and in particular to polyurethane rollers with long service life. Background Technology

[0002] A polyurethane roller according to Chinese patent document CN219529560U includes: a rotating shaft with fixing parts at both ends and fixing bolts, the fixing parts being connected to the rotating shaft via the fixing bolts; a plurality of fixing rings disposed on the surface of the rotating shaft and located between the fixing parts; contact rings surrounding the outer periphery of corresponding fixing rings; a spring disposed between the fixing rings and the contact rings; and a rubber sleeve fitted over the outer periphery of the contact rings. The beneficial effect of this invention is that the elastic force applied by the spring to the contact rings makes the distance from the rotating shaft to the outer periphery of the contact rings variable, allowing the roller to change or recover according to the shape of the object's surface when it contacts an object.

[0003] The aforementioned polyurethane roller has no sealing structure on either side during use. Due to the complex operating environment of polyurethane rollers, when the polyurethane roller is used in a dusty area for a long time, dust can easily enter its interior. When dust is inside the polyurethane roller, it can easily damage the internal structure, resulting in a shorter service life and poor practicality. Utility Model Content

[0004] The purpose of this invention is to provide a polyurethane roller with a long service life, which can solve the problem that when the polyurethane roller is used in a dusty area for a long time, dust can easily enter its interior. When the dust is inside the polyurethane roller, it can easily damage the internal structure, resulting in a short service life and poor practicality of the polyurethane roller.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a polyurethane roller with a long service life, comprising a roller main rod, a low-hardness elastic ring, and a fixing ring, wherein a sealing block is provided on the roller main rod;

[0006] A rubber ring is provided on the low-hardness elastic ring, and a high-hardness polyurethane ring is provided on the main rod of the rubber roller. The rubber ring is located between the low-hardness elastic ring and the high-hardness polyurethane ring.

[0007] There are two sets of fixing rings, with a high-hardness polyurethane ring located between the two sets and the fixing rings located on the main rod of the rubber roller.

[0008] Preferably, an annular support ring is fixedly installed on the outer wall of the main rod of the rubber roller, and a metal support frame is fixedly installed on the outer wall of the annular support ring, the metal support frame being arranged in a trapezoidal shape.

[0009] Preferably, a low-hardness elastic ring is fixedly installed on the outer wall of the metal support frame, a rubber ring is fixedly installed on the outer wall of the low-hardness elastic ring, and a high-hardness polyurethane ring is fixedly installed on the outer wall of the rubber ring.

[0010] Preferably, a fixing ring is fixedly installed on the outer wall of the main rod of the rubber roller, and a sealing block is fixedly installed on the adjacent side wall of the fixing ring and the high-hardness polyurethane ring. The sealing block has a funnel-shaped design.

[0011] Preferably, the outer wall of the high-hardness polyurethane ring is provided with grooves, the groove depth is 0.1-0.3mm, and the spacing between each group of grooves is 2-5mm.

[0012] Preferably, the metal support frame is located between the annular support ring and the low-hardness elastic ring, and the space between the annular support ring and the low-hardness elastic ring is filled with an aramid honeycomb core.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This long-life polyurethane roller, through the setting of a low-hardness elastic ring and a rubber ring, can buffer the high-hardness polyurethane ring when it comes into contact with materials, avoiding tearing damage to the high-hardness polyurethane ring caused by hard contact with materials, thus ensuring the service life of the high-hardness polyurethane ring. Furthermore, the annular support ring and metal support frame can provide support for the inside of the roller, thereby increasing the overall strength of the roller. The hardness gradient transition can reduce surface stress concentration, improve fatigue life, and increase the practicality of the device. The grooves on the surface of the high-hardness polyurethane ring can reduce the contact area between the high-hardness polyurethane ring and the material, reducing frictional heat generation. The combined use of the sealing block and the fixing ring can seal both sides of the high-hardness polyurethane ring, preventing dust from entering the inside of the roller and damaging its internal structure during use, thereby improving the service life of the roller and further increasing the practicality of the device. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a schematic diagram of the structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the present invention.

[0018] Reference numerals in the attached diagram: 1. Main rod of the rubber roller; 2. Annular support ring; 3. Metal support frame; 4. Low-hardness elastic ring; 5. Rubber ring; 6. High-hardness polyurethane ring; 7. Sealing block; 8. Fixing ring. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a technical solution: a long-service-life polyurethane roller, including a roller main rod 1, a low-hardness elastic ring 4, and a fixing ring 8. A sealing block 7 is provided on the roller main rod 1; a rubber ring 5 is provided on the low-hardness elastic ring 4, and a high-hardness polyurethane ring 6 is provided on the roller main rod 1. The rubber ring 5 is located between the low-hardness elastic ring 4 and the high-hardness polyurethane ring 6; there are two sets of fixing rings 8, with the high-hardness polyurethane ring 6 located between the two sets and the fixing rings 8 located on the roller main rod 1.

[0021] Furthermore, an annular support ring 2 is fixedly installed on the outer wall of the main roller 1, and a metal support frame 3 is fixedly installed on the outer wall of the annular support ring 2. The metal support frame 3 is trapezoidal in shape, and a low-hardness elastic ring 4 is fixedly installed on the outer wall of the metal support frame 3. A rubber ring 5 is fixedly installed on the outer wall of the low-hardness elastic ring 4, and a high-hardness polyurethane ring 6 is fixedly installed on the outer wall of the rubber ring 5. A fixing ring 8 is fixedly installed on the outer wall of the main roller 1, and a sealing block 7 is fixedly installed on the adjacent side wall of the fixing ring 8 and the high-hardness polyurethane ring 6. The sealing block 7 is funnel-shaped. The outer wall of the high-hardness polyurethane ring 6 has grooves with a depth of 0.1-0.3mm and a spacing of 2-5mm between each set of grooves. The metal support frame 3 is located between the annular support ring 2 and the low-hardness elastic ring 4, and the space between the annular support ring 2 and the low-hardness elastic ring 4 is filled with an aramid honeycomb core. This arrangement allows the high-hardness polyurethane ring 6 to contact the material. When in contact with the material, the high-hardness polyurethane ring 6 is cushioned to prevent tearing damage caused by hard contact, thus ensuring its service life. Furthermore, the annular support ring 2 and metal support frame 3 provide internal support for the roller, increasing its overall strength. The gradual hardness transition reduces surface stress concentration, improves fatigue life, and enhances the device's practicality. The grooves on the surface of the high-hardness polyurethane ring 6 reduce the contact area between it and the material, minimizing frictional heat. The combined use of the sealing block 7 and the fixing ring 8 seals both sides of the high-hardness polyurethane ring 6, preventing dust from entering and damaging its internal structure, further extending its service life and increasing the device's practicality.

[0022] Working principle: When the high-hardness polyurethane ring 6 comes into contact with the material, the rubber ring 5 and the low-hardness elastic ring 4 absorb the impact vibration and allow the high-hardness polyurethane ring 6 to recover and rebound, preventing the high-hardness polyurethane ring 6 from tearing during material transmission. The metal support frame 3 and the aramid honeycomb core provide internal support for the rubber roller, increasing the strength of the support and the stability of the rubber roller during operation. The sealing block 7 and the fixing ring 8 seal the inside of the high-hardness polyurethane ring 6, preventing dust from entering the inside of the rubber roller.

[0023] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A polyurethane roller with a long service life, characterized in that, include: The main rod of the rubber roller (1) is provided with a sealing block (7). A low-hardness elastic ring (4) is provided with a rubber ring (5), and a high-hardness polyurethane ring (6) is provided on the main rod (1) of the rubber roller. The rubber ring (5) is located between the low-hardness elastic ring (4) and the high-hardness polyurethane ring (6). The number of fixing rings (8) is two sets, with a high-hardness polyurethane ring (6) located between the two sets and the fixing rings (8) located on the main rod (1) of the rubber roller.

2. The long-service-life polyurethane roller according to claim 1, characterized in that: The outer wall of the main rod (1) of the rubber roller is fixedly installed with an annular support ring (2), and the outer wall of the annular support ring (2) is fixedly installed with a metal support frame (3), which is arranged in a trapezoidal shape.

3. The long-service-life polyurethane roller according to claim 2, characterized in that: The outer wall of the metal support frame (3) is fixedly installed with a low-hardness elastic ring (4), the outer wall of the low-hardness elastic ring (4) is fixedly installed with a rubber ring (5), and the outer wall of the rubber ring (5) is fixedly installed with a high-hardness polyurethane ring (6).

4. The long-service-life polyurethane roller according to claim 3, characterized in that: A fixing ring (8) is fixedly installed on the outer wall of the main rod (1) of the rubber roller. A sealing block (7) is fixedly installed on the adjacent side wall of the fixing ring (8) and the high hardness polyurethane ring (6). The sealing block (7) is designed in a funnel shape.

5. The long-service-life polyurethane roller according to claim 4, characterized in that: The outer wall of the high-hardness polyurethane ring (6) is provided with grooves, the groove depth is 0.1-0.3mm, and the spacing between each group of grooves is 2-5mm.

6. The long-service-life polyurethane roller according to claim 5, characterized in that: The metal support frame (3) is located between the annular support ring (2) and the low-hardness elastic ring (4), and the space between the annular support ring (2) and the low-hardness elastic ring (4) is filled with an aramid honeycomb core.

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