High-strength metal core roller

Abstract

The high-strength metal core roller comprises a bearing, a metal core and a rim, one side of the bearing abuts against a limiting step on the inner ring face of the metal core, and the other side of the bearing is limited through a clamping spring. The snap spring is embedded into an annular groove in the inner ring surface of the metal core; a hub is fixed between the metal core and the rim; an internal thread structure is arranged on the inner ring surface of the hub, and correspondingly, an external thread structure meshed with the internal thread structure is arranged on the outer ring surface of the metal core; a limiting protrusion A is arranged on the inner ring face of the rim, and correspondingly, a limiting groove A matched with the limiting protrusion A is formed in the outer ring face of the hub. According to the rolling wheel, the hub is arranged between the metal core and the rim, the bearing capacity is high, meanwhile, specific connecting structures are arranged on the hub, the metal core and the rim respectively, the bonding strength between the hub and the metal core and the bonding strength between the hub and the rim are high, looseness cannot be generated between the hub and the metal core and between the hub and the rim in the running process of the rolling wheel, and the use reliability is high.

Description

Technical Field

[0001] This utility model relates to the field of roller technology, specifically to a high-strength metal core roller. Background Technology

[0002] An escalator is a stationary, electrically driven device with circulating steps used to transport passengers upwards or downwards at an incline. Escalators are characterized by their large continuous transport capacity, smooth operation, and low failure rate, and are widely used in high-traffic areas such as shopping malls, hotels, shopping centers, airports, and subway stations. The rollers are a crucial component of the escalator, primarily responsible for supporting the step chains or treads to ensure smooth operation.

[0003] Rollers generally consist of bearings, a wheel hub, and a rim. As the actuator that drives the escalator, they need to rotate continuously during operation and must have a certain load-bearing capacity. In existing technology, to improve the load-bearing capacity of rollers, manufacturers often add a hub between the wheel hub and the rim during production. However, the hub is usually made of plastic, while the wheel hub is generally made of metal. The connection between the two is not very stable. With continuous use, the hub and hub can loosen, easily leading to relative rotation between them, which greatly reduces the reliability of the roller and affects its normal use. Moreover, the hub is directly connected to the wheel hub, making it prone to cracking and resulting in a shorter service life. Summary of the Invention

[0004] This invention provides a high-strength metal core roller to overcome the aforementioned problems in the prior art. The high-strength metal core roller of this invention improves the roller's strength and load-bearing capacity by setting a hub between the metal core and the rim. Furthermore, an internal thread structure is provided on the inner ring surface of the hub, and a limiting groove is provided on the outer ring surface of the hub. Simultaneously, an external thread structure that meshes with the internal thread structure is provided on the outer ring surface of the metal core, and a limiting protrusion that cooperates with the limiting groove is provided on the inner ring surface of the rim. This improves the bonding strength between the hub and the metal core, and between the hub and the rim. Therefore, during roller operation, there will be no loosening between the hub, the metal core, and the rim, improving the roller's reliability and extending its service life.

[0005] The technical solution of this application is as follows:

[0006] A high-strength metal-core roller includes a bearing, a metal core, and a rim. The bearing is fixed to the inner ring surface of the metal core. A limiting step is provided on the inner ring surface of the metal core. One side of the bearing abuts against the limiting step, and the other side is limited by a retaining spring. The retaining spring is embedded in an annular groove on the inner ring surface of the metal core. A hub is fixed between the metal core and the rim. An internal thread structure is provided on the inner ring surface of the hub, and correspondingly, an external thread structure is provided on the outer ring surface of the metal core. The internal thread structure and the external thread structure mesh with each other. A limiting protrusion A is provided on the inner ring surface of the rim, and correspondingly, a limiting groove A is provided on the outer ring surface of the hub. The limiting protrusion A is embedded in the limiting groove A.

[0007] Compared with existing technologies, this utility model's high-strength metal core roller improves the roller's strength and load-bearing capacity by setting a hub between the metal core and the rim. Specifically, an internal thread structure is provided on the inner ring surface of the hub, and a corresponding external thread structure engaging with the internal thread structure is provided on the outer ring surface of the metal core, thereby improving the bonding strength between the metal core and the hub. A limiting groove is provided on the outer ring surface of the hub, and a limiting protrusion corresponding to the limiting groove is provided on the inner ring surface of the rim, thereby improving the bonding strength between the rim and the hub. Therefore, during roller operation, the hub, metal core, and rim will not loosen, preventing the rim from easily detaching from the hub, and the hub from easily detaching from the metal core, thus improving the roller's reliability and extending its service life. Furthermore, the bearing is limited by a limiting step and a retaining spring on the metal core, facilitating assembly and ensuring high installation stability.

[0008] As an optimization, in the aforementioned high-strength metal core roller, the internal thread structure includes two spaced-apart internal threads with opposite directions of rotation, and correspondingly, the external thread structure includes two spaced-apart external threads with opposite directions of rotation. Therefore, during the rotation of the roller, the hub and the metal core are subjected to two opposite forces, preventing them from moving relative to each other and further improving the bonding strength between the hub and the metal core. Furthermore, on the inner ring surface of the hub, between the two internal threads, there is a B-limiting protrusion; correspondingly, on the outer ring surface of the metal core, between the two external threads, there is a B-limiting groove; the B-limiting protrusion is embedded in the B-limiting groove. Through the mutual cooperation of the B-limiting protrusion and the B-limiting groove, the metal core and the hub can be better bonded together, thereby further increasing the bonding force between them. Furthermore, there are two B-limiting protrusions and two B-limiting grooves, and the two B-limiting protrusions are symmetrically distributed about the B-limiting groove. This ensures balanced force on both sides of the hub, guaranteeing its structural strength.

[0009] As an optimization, in the aforementioned high-strength metal core roller, a set of grooves is formed on each of the two sides of the metal core. By setting multiple grooves on both sides of the metal core, the weight of the metal core is reduced without reducing its load-bearing capacity, thereby reducing the overall weight of the roller and achieving the goal of lightweighting. Furthermore, it also saves material costs and is economical. Moreover, the grooves on each side are evenly distributed along the circumference of the metal core, and the grooves on the two sides are symmetrically distributed. This ensures that the forces among the grooves are balanced, which helps to disperse the load-bearing capacity of the metal core, thus ensuring the overall load-bearing performance and operational stability of the roller.

[0010] As an optimization, the aforementioned high-strength metal core roller has rounded corners on both sides of the outer circumference of the rim. The rounded corners make the outer edge of the roller transition smoothly and naturally, improving the roller's operational stability.

[0011] As an optimization, in the aforementioned high-strength metal core roller, the rim can be integrally injection molded from polyurethane material, and the hub can be integrally injection molded from nylon material. The polyurethane rim provides sufficient strength and is not easily worn during use. The nylon hub meets mechanical strength requirements and is less prone to deformation or delamination during operation, thus improving the roller's service life. Furthermore, the integral injection molding of the rim and hub facilitates manufacturing and reduces processing costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the high-strength metal core roller in Embodiment 1 of this application;

[0013] Figure 2 yes Figure 1 A cross-sectional view of the metal core roller in the image;

[0014] Figure 3 This is a schematic diagram of the metal core structure in Embodiment 1 of this application;

[0015] Figure 4 This is a schematic diagram of the wheel hub in Embodiment 1 of this application;

[0016] Figure 5 This is a schematic diagram of the rim structure in Embodiment 1 of this application;

[0017] Figure 6 This is a cross-sectional schematic diagram of the high-strength metal core roller in Embodiment 2 of this application;

[0018] Figure 7 This is a cross-sectional view of the metal core in Embodiment 3 of this application.

[0019] The markings in the attached diagram are as follows: 1-Bearing; 2-Metal core; 201-Limiting step; 202-Annular groove; 203-External thread structure; 204-B limiting groove; 205-Groove; 3-Hub; 301-Internal thread structure; 302-A limiting groove; 303-B limiting protrusion; 4-Wheel rim; 401-A limiting protrusion; 402-Rounded corner; 5-Snap ring. Detailed Implementation

[0020] The present application will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present application.

[0021] This utility model provides a high-strength metal core roller, in which a hub 3 is provided between the metal core 2 and the rim 4 to improve the load-bearing capacity of the roller. At the same time, a specific connection structure is provided on the hub 3, the metal core 2, and the rim 4 to improve the bonding strength between the hub 3 and the metal core 2 and the rim 4. The specific structure is as follows. Example

[0022] See Figure 1 and Figure 2 The high-strength metal core roller in this embodiment includes a bearing 1, a metal core 2, and a rim 4. The bearing 1 is a rolling bearing, fixed to the inner ring surface of the metal core 2. A limiting step 201 is provided on the inner ring surface of the metal core 2. One side of the bearing 1 abuts against the limiting step 201, and the other side is limited by a retaining spring 5. The retaining spring 5 is embedded in an annular groove 202 on the inner ring surface of the metal core 2. A hub 3 is fixed between the metal core 2 and the rim 4. An internal thread structure 301 is provided on the inner ring surface of the hub 3, and correspondingly, an external thread structure 203 is provided on the outer ring surface of the metal core 2. The internal thread structure 301 and the external thread structure 203 mesh with each other. An A limiting protrusion 401 is provided on the inner ring surface of the rim 4, and correspondingly, an A limiting groove 302 is provided on the outer ring surface of the hub 3. The A limiting protrusion 401 is embedded in the A limiting groove 302.

[0023] See Figure 3 and Figure 4 In this embodiment, the internal thread structure 301 includes two spaced-apart internal threads with opposite directions of rotation, and correspondingly, the external thread structure 203 includes two spaced-apart external threads with opposite directions of rotation. Therefore, during the rotation of the roller, the hub 3 and the metal core 2 are subjected to two opposite forces, preventing them from moving relative to each other and further improving the bonding strength between the hub 3 and the metal core 2.

[0024] Furthermore, on the inner ring surface of the hub 3, between the two internal threads, there is a B-limiting protrusion 303; correspondingly, on the outer ring surface of the metal core 2, between the two external threads, there is a B-limiting groove 204; the B-limiting protrusion 303 is embedded in the B-limiting groove 204. Through the mutual cooperation of the B-limiting protrusion 303 and the B-limiting groove 204, the metal core 2 and the hub 3 can be better joined together, thereby further increasing the bonding force between the metal core 2 and the hub 3. The B-limiting protrusion 303 and the B-limiting groove 302 are distributed relatively opposite to each other.

[0025] See Figure 5 In this embodiment, the outer circumference of the wheel rim 4 is provided with rounded corners 402 on both sides. The design of the rounded corners 402 makes the outer edge of the roller transition smoothly and naturally, improving the running stability of the roller.

[0026] In this embodiment, the rim 4 is integrally injection molded from polyurethane material, and the hub 3 is integrally injection molded from nylon material. Both the rim 4 and hub 3 possess sufficient strength, are not easily worn during use, and the hub 3 is less prone to deformation or delamination during operation, thus improving the service life of the roller. Furthermore, the integral injection molding of the rim 4 and hub 3 facilitates manufacturing and reduces processing costs. The metal core 2 is formed using CNC machining. Example

[0027] See Figure 6 Unlike Embodiment 1, in this embodiment, the inner ring surface of the hub 3 is provided with two B-limiting protrusions 303 spaced apart, and the outer ring surface of the metal core 2 is provided with two corresponding B-limiting grooves 204; the two B-limiting protrusions 303 are symmetrically distributed about the A-limiting grooves 302. This ensures that the forces on both sides of the hub 3 are balanced, guaranteeing the structural strength of the hub 3. The two spaced B-limiting protrusions 303 divide the internal thread structure 301 on the inner ring surface of the hub 3 into three internal threads, with the two internal threads on the two sides having opposite directions of rotation. Correspondingly, the two spaced B-limiting grooves 204 divide the external thread structure 203 on the outer ring surface of the metal core 2 into three external threads, with the two external threads on the two sides having opposite directions of rotation. Example

[0028] See Figure 7Unlike Embodiment 1, in this embodiment, a set of grooves 205 are respectively formed on two sides of the metal core 2. By providing multiple grooves 205 on both sides of the metal core 2, the weight of the metal core 2 is reduced without reducing its load-bearing capacity, thereby reducing the overall weight of the roller and achieving the purpose of lightweighting. Furthermore, it also saves material costs and is economical. Moreover, the grooves 205 on each side are evenly distributed along the circumference of the metal core 2, and the grooves 205 on the two sides are symmetrically distributed. This ensures that the forces among the grooves 205 are balanced, which helps to disperse the load-bearing capacity of the metal core 2, thereby ensuring the overall load-bearing performance and operational stability of the roller.

[0029] The foregoing general description of the utility model and its specific embodiments should not be construed as limiting the technical solution of the utility model. Those skilled in the art, based on the disclosure of this application, can add, reduce, or combine the disclosed technical features in the foregoing general description and / or specific embodiments (including examples) without departing from the constituent elements of the utility model, to form other technical solutions within the protection scope of this application.

Claims

1. A high-strength metal-core roller, comprising a bearing (1), a metal core (2), and a rim (4); wherein the bearing (1) is fixed to the inner ring surface of the metal core (2); characterized in that: The inner ring surface of the metal core (2) is provided with a limiting step (201). One side of the bearing (1) abuts against the limiting step (201), and the other side is limited by a retaining ring (5). The retaining ring (5) is embedded in the annular groove (202) on the inner ring surface of the metal core (2). A hub (3) is fixed between the metal core (2) and the rim (4). The inner ring surface of the hub (3) is provided with an internal thread structure (301), and correspondingly, the outer ring surface of the metal core (2) is provided with an external thread structure (203). The internal thread structure (301) and the external thread structure (203) mesh with each other. The inner ring surface of the rim (4) is provided with an A limiting protrusion (401), and correspondingly, the outer ring surface of the hub (3) is provided with an A limiting groove (302). The A limiting protrusion (401) is embedded in the A limiting groove (302).

2. The high-strength metal core roller according to claim 1, characterized in that: The internal thread structure (301) includes two spaced-apart internal threads with opposite directions of rotation, and correspondingly, the external thread structure (203) includes two spaced-apart external threads with opposite directions of rotation.

3. The high-strength metal core roller according to claim 2, characterized in that: On the inner ring surface of the hub (3), between the two internal threads, there is a B-limiting protrusion (303), and on the outer ring surface of the metal core (2), between the two external threads, there is a B-limiting groove (204); the B-limiting protrusion (303) is embedded in the B-limiting groove (204).

4. The high-strength metal core roller according to claim 3, characterized in that: The inner ring surface of the hub (3) is provided with two B-limiting protrusions (303) spaced apart, and the outer ring surface of the metal core (2) is provided with two corresponding B-limiting grooves (204).

5. The high-strength metal core roller according to claim 4, characterized in that: Two B-limiting protrusions (303) are symmetrically distributed about the A-limiting groove (302).

6. The high-strength metal core roller according to claim 1, characterized in that: A set of grooves (205) are respectively provided on the two sides of the metal core (2).

7. The high-strength metal core roller according to claim 6, characterized in that: The grooves (205) on each side are evenly distributed along the circumference of the metal core (2), and the grooves (205) on the two sides are symmetrically distributed.

8. The high-strength metal core roller according to claim 1, characterized in that: The outer ring surface of the rim (4) is provided with rounded corners (402) on both sides.

9. The high-strength metal core roller according to any one of claims 1 to 8, characterized in that: The rim (4) is integrally injection molded from polyurethane material, and the hub (3) is integrally injection molded from nylon material.

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