Roller with inner and outer ring fastening

Abstract

The utility model relates to a gyro wheel, especially a gyro wheel with fastened inner and outer rings, which solves the design problem of the gyro wheel. The gyro wheel comprises an inner ring, an outer ring and a connecting shaft arranged along the same axis. The inner ring is nested on the inner side of the outer ring in the radial direction. The inner ring and the outer ring are limited in the axial direction. A pouring hole is arranged on the inner ring. A wrapping column is arranged in the pouring hole of the outer ring. A self-lubricating oil groove is arranged on the inner wall of the inner ring. An inner flange is arranged on the inner ring to limit the connecting shaft. A fixed rib ring is arranged on the axial end face of the inner ring to adhere to the inner wall of the outer ring. The pouring hole of the inner ring is filled with polyurethane, so that the wrapping column is firmly fixed on the inner ring, and the outer ring will not be deformed and fall off. Two self-lubricating oil grooves are arranged in the inner ring. After oil injection, the lubricating oil is still in the oil groove even after long-term rotation, so that long-term lubrication is ensured.

Description

Technical Field

[0001] This utility model relates to a roller, and more particularly to a roller with inner and outer rings fastened together. Background Technology

[0002] Plastic rollers are rolling components made of plastic and are widely used in industrial equipment, logistics and transportation, and home appliances. For example, refrigerator drawer rollers are installed at the bottom of the drawer and interact with the built-in slide rails to achieve smooth pushing and pulling of the drawer. While existing rollers are simple in structure and initially provide smooth sliding, long-term use can lead to drawer jamming due to dust accumulation, roller deformation, or roller detachment. Utility Model Content

[0003] In view of the shortcomings of existing technology, this utility model provides a roller with inner and outer rings fastened together.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a roller with inner and outer rings fastened together, comprising an inner ring, an outer ring, and a connecting shaft arranged along the same axis. The inner ring is nested radially inside the outer ring, and the inner ring and the outer ring are axially intercepted and limited. The inner ring is provided with a through-hole for casting, and the outer ring is provided with a wrapping column for casting into the hole. The inner wall of the inner ring is provided with a self-lubricating oil groove, and the inner ring is also provided with an inner flange for the connecting shaft to intercept.

[0005] The inner ring has a fixing rib on its axial end face that fits against the inner wall of the outer ring.

[0006] The inner ring has a groove on one side of the fixed rib ring and an inner flange formed at the bottom of the groove.

[0007] The inner flange is an annular structure, and the connecting shaft is provided with a baffle corresponding to the inner flange.

[0008] The connecting shaft is also provided with external threads for connection and fixation, as well as a reinforcing part.

[0009] The casting holes are evenly spaced along the inner circumference, and the casting holes have a waist-shaped structure.

[0010] The outer ring has an annular groove on its inner side wall.

[0011] The self-lubricating oil grooves are arranged in a ring around the inner ring axis, and at least two self-lubricating oil grooves are provided in the axial direction of the inner ring.

[0012] The outer ring is formed by casting polyurethane for damping and noise reduction.

[0013] The beneficial effects of this utility model are as follows: The outer ring of the roller with inner and outer ring fastening provided by this utility model is made of soft rubber polyurethane, and the inner ring is made of POM plastic. First, the inner ring is injection molded with an injection molding machine, and then the inner ring is put into a casting machine to cast the outer ring. The polyurethane will fill the casting hole of the inner ring, thereby forming a wrapping column that is firmly fixed on the inner ring, and the outer ring will not deform or fall off.

[0014] The inner ring has two self-lubricating oil grooves in the middle. Even if it rotates for a long time after being filled with oil, the lubricating oil will still be in the oil grooves to ensure long-term lubrication. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the combined structure of this utility model;

[0016] Figure 2 This is an exploded structural diagram of the present invention. Detailed Implementation

[0017] like Figures 1-2 As shown, a roller with inner and outer rings 2 fastened together includes an inner ring 1, an outer ring 2, and a connecting shaft 3 arranged along the same axis. The inner ring 1 is nested radially inside the outer ring 2, and the inner ring 1 and outer ring 2 are axially engaged and limited. The inner ring 1 has a through-hole 4 for casting, and the outer ring 2 has a retaining column 5 for casting into the casting hole 4. The inner wall of the inner ring 1 has a self-lubricating oil groove 6, which can retain lubricant to maintain smoothness. When the product does not contain lubricant, it can be added directly here. The inner ring 1 also has an inner flange 8 for the connecting shaft 3 to engage, limiting the relative disengagement of the connecting shaft 3. The structural form of the inner ring 1 and outer ring 2 is conducive to production and enhances the connection, unlike the traditional tight connection design of the inner ring 1 and connecting shaft 3. The outer ring 2 is made of damping and noise-reducing polyurethane casting. The outer ring 2 is made of soft polyurethane material, and the inner ring 1 is made of POM plastic. First, the inner ring 1 is injection molded using an injection molding machine. Then, the inner ring 1 is placed in a casting machine to cast the outer ring 2. The polyurethane will fill the casting hole 4 of the inner ring 1, thus forming a wrapping pillar 5, which is firmly fixed to the inner ring 1, and the outer ring 2 will not deform or fall off. POM (polyoxymethylene resin) is a linear polymer with no side chains, high density, and high crystallinity. It is an engineering plastic with excellent comprehensive properties. It has good physical, mechanical, and chemical properties, especially excellent abrasion resistance. Commonly known as acetal or polyoxymethylene, it is the third largest general-purpose engineering plastic. It is suitable for making wear-resistant and friction-reducing parts, transmission parts, and parts for chemical and instrument industries.

[0018] The inner ring 1 has a fixing rib 7 on its axial end face that fits against the inner wall of the outer ring 2, which strengthens the local structure and ensures that the surface of the connecting shaft 3 is flush after installation, thus enhancing its positioning stability. In this embodiment, for ease of manufacturing, the inner ring 1 has a groove on one side of the fixing rib 7 and an inner flange 8 formed at the bottom of the groove. The inner flange 8 is an annular structure, and the connecting shaft 3 has a baffle 9 corresponding to the inner flange 8, ensuring uniform and reliable force distribution. Simultaneously, the connecting shaft 3 has a simple and reliable structural design, allowing for the purchase of existing components or convenient in-house production, reducing production costs. The connecting shaft 3 also has an external thread for connection and a reinforcing part 10. This meets the design requirements and satisfies the needs for connection and service life.

[0019] The casting holes 4 are evenly spaced along the circumference of the inner ring 1. The waist-shaped structure of the casting holes 4 is beneficial for strengthening the structural strength of the wrapping column 5 and for evenly balancing the force or stress on the wrapping column 5. The outer ring 2 has an annular groove 11 on its inner wall. This structure allows the outer ring 2 to partially wrap around the inner ring 1, similar to a car tire, resulting in a tighter fit. The self-lubricating oil grooves 6 are arranged in a ring around the axis of the inner ring 1, and at least two self-lubricating oil grooves 6 are provided axially along the inner ring 1. Multiple grooves help reduce lubricating oil overflow.

[0020] 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 roller with inner and outer rings fastened together, characterized in that, It includes an inner ring, an outer ring, and a connecting shaft arranged along the same axis. The inner ring is nested radially inside the outer ring. The inner ring and the outer ring are axially intercepted and limited. The inner ring has a through-hole for casting. The outer ring has a column for casting into the hole. The inner wall of the inner ring has a self-lubricating oil groove. The inner ring also has an inner flange for the connecting shaft to intercept.

2. The roller with inner and outer ring fastening as described in claim 1, characterized in that, The inner ring has a fixing rib on its axial end face that fits against the inner wall of the outer ring.

3. A roller with inner and outer ring fastening as described in claim 2, characterized in that, The inner ring has a groove on one side of the fixed rib ring and an inner flange formed at the bottom of the groove.

4. A roller with inner and outer ring fastening as described in claim 1, 2, or 3, characterized in that, The inner flange is an annular structure, and the connecting shaft is provided with a baffle corresponding to the inner flange.

5. A roller with inner and outer ring fastening as described in claim 4, characterized in that, The connecting shaft is also provided with external threads for connection and fixation, as well as a reinforcing part.

6. A roller with inner and outer ring fastening as described in claim 1, characterized in that, The casting holes are evenly spaced along the inner circumference, and the casting holes have a waist-shaped structure.

7. A roller with inner and outer ring fastening as described in claim 1, characterized in that, The outer ring has an annular groove on its inner side wall.

8. A roller with inner and outer ring fastening as described in claim 1, characterized in that, The self-lubricating oil grooves are arranged in a ring around the inner ring axis, and at least two self-lubricating oil grooves are provided in the axial direction of the inner ring.

9. A roller with inner and outer ring fastening as described in claim 1, characterized in that, The outer ring is formed by casting polyurethane for damping and noise reduction.

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