High-strength escalator roller

Abstract

The utility model discloses a high-strength escalator roller which comprises a bearing, a hub and a rim which are sequentially arranged from inside to outside. Annular reinforcing ribs are arranged on the inner ring face of the rim, correspondingly, annular grooves are formed in the outer ring face of the hub, and the annular reinforcing ribs are embedded into the annular grooves. An annular limiting groove is formed in the inner annular face of the annular reinforcing rib, correspondingly, an annular limiting strip is arranged on the outer annular face of the annular groove, and the annular limiting strip is embedded into the annular limiting groove. According to the high-strength escalator roller, the annular reinforcing ribs and the annular grooves are matched with each other, and the annular limiting grooves and the annular limiting strips are matched with each other, so that the bonding strength of the rim and the hub is improved, the use reliability of the roller is high, and due to the arrangement of the annular reinforcing ribs and the annular limiting grooves on the inner annular surface of the rim, the service life of the roller is prolonged. And when the roller bears heavy load, the effect of releasing stress and extrusion force can be achieved, and the service life of the roller is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of rollers, in particular to a high-strength escalator roller. Background Art

[0002] An escalator is a fixed electric-driven device for transporting passengers upward or downward on an inclined plane, which has the characteristics of large conveying capacity, durability, and stable operation. It is widely used in public places with concentrated passenger flows such as department stores, large supermarkets, airports, and subway stations. As an execution component for driving the operation of an escalator, the quality and service life of the step roller determine the quality and service life of the escalator. Since the step roller needs to rotate for a long time during operation, the step roller must have a certain bearing capacity. In the prior art, generally, a hub is added between the rolling bearing and the rim to increase the bearing capacity of the step roller. However, since the rim is directly sleeved outside the hub, the combination between the two is not very stable; with the continuous use of the step roller, delamination and cracking may occur between the rim and the hub, and then the phenomenon of debonding between the rim and the hub appears, greatly reducing the use reliability of the step roller. In addition, in order to achieve the purpose of light weight, some manufacturers will design the size of the hub to be relatively small and the rim to be relatively thick when manufacturing the step roller. During use, the rim is prone to deformation and detachment from the hub, and air bubbles are likely to remain inside the rim during injection molding, and it is easy to crack during use, reducing the service life of the step roller. Summary of the Utility Model

[0003] The utility model provides a high-strength escalator roller with high bonding strength, good load-bearing performance, and high use reliability to overcome the above problems existing in the prior art. The high-strength escalator roller of the utility model is provided with an annular reinforcing rib and an annular limiting groove on the inner ring surface of the rim, and an annular groove and an annular limiting strip are correspondingly arranged on the outer ring surface of the hub. Through the mutual cooperation of the annular reinforcing rib and the annular groove, and the mutual cooperation of the annular limiting groove and the annular limiting strip, the bonding strength between the rim and the hub is improved, so that the use reliability of the roller is high. Moreover, the arrangement of the annular reinforcing rib and the annular limiting groove on the inner ring surface of the rim can also play a role in releasing stress and extrusion force when the roller bears heavy loads, extending the service life of the roller.

[0004] The technical solution of this application is as follows:

[0005] A high-strength escalator roller, comprising a bearing, a hub and a rim; the bearing is fixed on the inner ring surface of the hub; the rim is fixed on the outer ring surface of the hub; an annular reinforcing rib is arranged on the inner ring surface of the rim, correspondingly, an annular groove is formed on the outer ring surface of the hub, and the annular reinforcing rib is embedded in the annular groove; an annular limiting groove is formed on the inner ring surface of the annular reinforcing rib, correspondingly, an annular limiting strip is arranged on the outer ring surface of the annular groove, and the annular limiting strip is embedded in the annular limiting groove.

[0006] Compared with the prior art, in the high-strength escalator roller of the present application, an annular reinforcing rib and an annular limiting groove are arranged on the inner ring surface of the rim, and an annular groove and an annular limiting strip are correspondingly arranged on the outer ring surface of the hub. Through the mutual cooperation of the annular reinforcing rib and the annular groove, and the mutual cooperation of the annular limiting groove and the annular limiting strip, the bonding strength between the rim and the hub is improved, so that during the use of the roller, delamination and cracking are not likely to occur between the rim and the hub, thereby preventing the phenomenon of the rim detaching from the hub, improving the use reliability of the roller, and moreover, the arrangement of the annular reinforcing rib and the annular limiting groove on the inner ring surface of the rim can also play a role in releasing stress and extrusion force when the roller bears heavy loads, extending the service life of the roller.

[0007] As an optimization, the aforementioned high-strength escalator roller can be a step roller.

[0008] As an optimization, in the aforementioned high-strength escalator roller, a reticulated structure is arranged on the inner ring surface of the rim. The reticulated structure is beneficial to improving the fusion bonding performance of the two materials of the inner ring surface of the rim and the outer ring surface of the hub, facilitating better fixing and connecting the rim and the hub together, improving their bonding strength, so that during the operation of the roller, the hub and the rim will not move relative to each other, thereby improving the connection safety and stability between the hub and the rim, and the roller has a high running smoothness. Further, the reticulated structure can be formed by intersecting 45° - 60° oblique lines.

[0009] As an optimization, in the aforementioned high-strength escalator roller, the hub includes an inner ring, an outer ring, and an annular connecting portion connecting the inner ring and the outer ring; a group of first grooves are arranged on one side of the annular connecting portion, and a group of second grooves are arranged on the other side. The hub adopts the above structure, which can reduce the weight of the hub under the condition of ensuring the bearing capacity of the roller, and then reduce the overall weight of the roller, achieving the purpose of light weight, and can also save manufacturing consumables and reduce production costs. The width of the inner ring is less than the width of the outer ring.

[0010] Further, an annular limiting protrusion is arranged at each end of the inner ring, so as to form a fixing groove on the inner ring surface of the inner ring, and the bearing is embedded in the fixing groove. Thus, the connection firmness between the bearing and the hub can be improved, and the integrity of the roller is better.

[0011] Further, an annular groove is provided on the inner annular surface of the annular limiting protrusion. Thus, it is convenient to realize the connection between the roller and other components through the annular groove in the later stage. For example, a waterproof cover can be embedded in the annular groove to form a sealing structure on both sides of the roller, achieving the purpose of waterproof and dustproof.

[0012] As an optimization, in the aforementioned high-strength escalator roller, the width of the rim is greater than the width of the outer ring. At this time, both sides of the rim will partially extend relative to the hub, facilitating the peeling of the rim when the rim or the hub breaks. Further, an A chamfer and a B chamfer are respectively provided on the inner annular surface and the outer annular surface of the rim. The design of the chamfers makes the inner and outer edges of the roller transition smoothly and naturally, improving the running stability of the roller.

[0013] As an optimization, in the aforementioned high-strength escalator roller, the rim can be injection molded from polyurethane material, and the hub can be injection molded from nylon material. The polyurethane material has good wear resistance and high mechanical strength. The rim is made of polyurethane material, making the roller have sufficient strength and not easy to wear during use; the nylon material is relatively hard, has good self-lubricating performance, and a small friction coefficient; the hub is made of nylon material, its mechanical strength meets the requirements, and the hub is not easy to deform or delaminate during work, and has a long service life. Description of the Drawings

[0014] Figure 1 is a schematic structural diagram of the high-strength escalator roller in the present application;

[0015] Figure 2 is Figure 1 the sectional view taken along the line A-A in

[0016] Figure 3 is a schematic structural diagram of the rim in the embodiment of the present application;

[0017] Figure 4 is a schematic structural diagram of the hub in the embodiment of the present application.

[0018] The reference signs in the drawings are: 1 - bearing; 2 - hub, 201 - annular groove, 202 - annular limiting strip, 203 - inner ring, 2031 - annular groove, 204 - outer ring, 205 - annular connecting portion, 206 - first groove, 207 - second groove, 208 - fixing groove; 3 - rim, 301 - annular reinforcing rib, 302 - annular limiting groove, 303 - reticulated structure, 304 - A chamfer, 305 - B chamfer. Detailed Embodiments

[0019] The present application will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present application.

[0020] See Figure 1 and Figure 2 For the high-strength escalator roller of the present application, it includes a bearing 1, a hub 2 and a rim 3; the bearing 1 is fixed on the inner ring surface of the hub 2; the rim 3 is fixed on the outer ring surface of the hub 2; an annular reinforcing rib 301 is provided on the inner ring surface of the rim 3. Correspondingly, an annular groove 201 is formed on the outer ring surface of the hub 2, and the annular reinforcing rib 301 is embedded in the annular groove 201; an annular limiting groove 302 is formed on the inner ring surface of the annular reinforcing rib 301. Correspondingly, an annular limiting strip 202 is provided on the outer ring surface of the annular groove 201, and the annular limiting strip 202 is embedded in the annular limiting groove 302. In the present application, through the mutual cooperation of the annular reinforcing rib 301 and the annular groove 201, and the mutual cooperation of the annular limiting groove 302 and the annular limiting strip 202, the bonding strength between the rim 3 and the hub 2 is improved, thereby preventing the rim 3 from detaching from the hub 2 during the use of the roller and ensuring the normal operation of the roller. Moreover, the arrangement of the annular reinforcing rib 301 and the annular limiting groove 302 on the inner ring surface of the rim 3 can also play a role in releasing stress and extrusion force when the roller bears heavy loads, extending the service life of the roller.

[0021] Embodiment:

[0022] In this embodiment, the roller is a step roller; the bearing 1 is a rolling bearing.

[0023] See Figure 3 In this embodiment, a reticulated structure 303 is provided on the inner ring surface of the rim 3. The reticulated structure 303 is beneficial to improving the fusion bonding performance of the two materials of the inner ring surface of the rim 3 and the outer ring surface of the hub 2, facilitating better fixing and connecting the rim 3 and the hub 2 together, improving the bonding strength, preventing the hub 2 and the rim 3 from moving relative to each other during the operation of the roller, thereby improving the connection safety and stability between the hub 2 and the rim 3, and making the operation of the roller highly stable. Further, the reticulated structure 303 is formed by the intersection of 60° oblique lines.

[0024] See Figure 4, in this embodiment, the wheel hub 2 includes an inner ring 203, an outer ring 204, and an annular connecting portion 205 connecting the inner ring 203 and the outer ring 204; one side of the annular connecting portion 205 is provided with a group of first grooves 206 evenly spaced in the circumferential direction, and the other side is provided with a group of second grooves 207 evenly spaced in the circumferential direction (the number of the first grooves 206 and the second grooves 206 is set according to actual use requirements). With the above structure of the wheel hub 2, under the condition of ensuring the bearing capacity of the roller, the weight of the wheel hub 2 can be reduced, and then the overall weight of the roller can be reduced, achieving the purpose of light weight. Moreover, manufacturing consumables can be saved and production costs can be reduced. Further, the width of the inner ring 203 is smaller than the width of the outer ring 204; this is convenient for further reducing the weight of the wheel hub 2 while ensuring the structural strength of the wheel hub 2. At this time, the groove widths of the first grooves 206 and the second grooves 207 gradually decrease from the outside to the inside.

[0025] Further, both ends of the inner ring 203 are respectively provided with an annular limiting protrusion, so as to form a fixing groove 208 on the inner ring surface of the inner ring 203, and the bearing 1 is embedded in the fixing groove 208. Thus, the connection firmness between the bearing 1 and the wheel hub 2 can be improved, and the integrity of the roller is better.

[0026] Further, an annular groove 2031 is provided on the inner ring surface of the annular limiting protrusion. At this time, the connection between the roller and the waterproof cover can be realized through the annular groove 2031; by embedding the waterproof cover into the annular groove 2031, a sealing structure can be formed on both sides of the roller, achieving the purpose of waterproof and dustproof.

[0027] In this embodiment, the width of the rim 3 is greater than the width of the outer ring 204, that is, the entire wheel hub 2 is located inside the rim 3. At this time, both sides of the rim 3 extend partially relative to the wheel hub 2, which is convenient for peeling off the rim 3 when the rim 3 or the wheel hub 2 is broken. Further, an A fillet 304 and a B fillet 305 are respectively provided on the inner ring surface and the outer ring surface of the rim 3. The design of the fillets makes the inner and outer edges of the roller transition smoothly and naturally, improving the running stability of the roller.

[0028] In this embodiment, the rim 3 is injection molded with TPU material (thermoplastic polyurethane elastomer rubber), and the wheel hub 2 is injection molded with nylon material. At this time, the rim 3 has good wear resistance and high mechanical strength, so that the roller has sufficient strength and is not easily worn during use; the wheel hub 2 is made of nylon material, its mechanical strength meets the requirements, and the wheel hub 2 is not easily deformed or delaminated during work, and has a long service life.

[0029] When manufacturing the roller of the present application, the rim 3 is first injection-molded, and then the rim 3 and the bearing 1 are placed in a mold to inject nylon, thereby obtaining the finished product. The shapes of the annular groove 201 and the annular limiting strip 202 on the hub 2 depend on the shapes of the annular reinforcing rib 301 and the annular limiting groove 302 on the rim 3.

[0030] The above general description of the utility model involved in the present application and the description of its specific implementation manners should not be construed as a limitation on the technical solution of the utility model. Those skilled in the art can, based on the disclosure of the present application, without departing from the constituent elements of the utility model involved, add, subtract, or combine the disclosed technical features in the above general description or / and specific implementation manners (including embodiments) to form other technical solutions that fall within the protection scope of the present application.

Claims

1. A high-strength escalator roller, comprising a bearing (1), a wheel hub (2) and a wheel rim (3); the bearing (1) is fixed to the inner ring surface of the wheel hub (2); the wheel rim (3) is fixed to the outer ring surface of the wheel hub (2); the characteristics are: An annular reinforcing rib (301) is provided on the inner annular surface of the wheel rim (3), and correspondingly, an annular groove (201) is provided on the outer annular surface of the wheel hub (2), and the annular reinforcing rib (301) is embedded in the annular groove (201); an annular limiting groove (302) is provided on the inner annular surface of the annular reinforcing rib (301), and correspondingly, an annular limiting strip (202) is provided on the outer annular surface of the annular groove (201), and the annular limiting strip (202) is embedded in the annular limiting groove (302).

2. The high-strength escalator roller according to claim 1, characterized in that: The roller is a stepped roller.

3. The high-strength escalator roller according to claim 1 or 2, characterized in that: A mesh structure (303) is provided on the inner annular surface of the wheel rim (3).

4. The high-strength escalator roller according to claim 3, characterized in that: The mesh structure (303) is formed by the intersection of 45° to 60° diagonal lines.

5. The high-strength escalator roller according to claim 1 or 2, characterized in that: The wheel hub (2) comprises an inner ring (203), an outer ring (204), and an annular connecting portion (205) connecting the inner ring (203) and the outer ring (204); a group of first grooves (206) are provided on one side of the annular connecting portion (205), and a group of second grooves (207) are provided on the other side.

6. The high-strength escalator roller according to claim 5, characterized in that: An annular limiting protrusion is respectively provided at both ends of the inner ring (203), thereby forming a fixing groove (208) on the inner ring surface of the inner ring (203), and the bearing (1) is embedded in the fixing groove (208).

7. The high-strength escalator roller according to claim 6, characterized in that: An annular groove (2031) is provided on the inner annular surface of the annular limiting protrusion.

8. The high-strength escalator roller according to claim 5, characterized in that: The width of the inner ring (203) is smaller than the width of the outer ring (204).

9. The high-strength escalator roller according to claim 5, characterized in that: The width of the wheel rim (3) is greater than the width of the outer ring (204).

10. The high-strength escalator roller according to claim 1 or 2, characterized in that: The wheel rim (3) is injection-molded from a polyurethane material, and the wheel hub (2) is injection-molded from a nylon material.

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