Protective roller, escalator and moving sidewalk

Abstract

The utility model relates to the field of mechanical parts, in particular to a protective roller, an escalator and a moving sidewalk. The wheel hub of the roller comprises the wheel hub main body, the first side part and the second side part, and the first side part, the second side part and the wheel hub main body can form the accommodating cavity for accommodating the bearing outer ring, so that the bearing outer ring can be embedded into the accommodating cavity. The two sides of the bearing are coated with the plastic protection layers (the first side part and the second side part) of the hub, so that the rusting risk of the metal bearing can be reduced. The rolling wheel further comprises a sealing assembly which is arranged on the outer side of the bearing and located at one end of the first side part and one end of the second side part, so that the bearing can be subjected to double protection, and the service life of the rolling wheel is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of mechanical accessories, in particular to a protective roller, an escalator and a moving walkway. Background Art

[0002] Traditional metal rollers consist of a rim, a metal hub, and a standard bearing. The metal hub, being wider and thicker, has a higher load-bearing capacity. However, the assembly process for metal rollers is complex and cannot be automated. During assembly, the standard bearing must first be pressed into the metal hub, followed by the retaining ring. Some rollers using double retaining rings also require a retaining ring to be installed in the metal hub before the bearing is pressed in. Traditional plastic rollers consist of a rim, a plastic hub, and a standard bearing. The width and thickness of the standard bearing are standard, resulting in a relatively limited load-bearing capacity. Furthermore, for mechanical equipment installed outdoors, the roller bearings and metal hubs often rust due to erosion by rainwater. For example, the rollers of escalators and moving walkways installed outdoors are critical safety components of the step chain and step system. The exposed metal parts of the rollers are susceptible to rust, thus affecting the normal operation of the escalator and moving walkway.

[0003] Therefore, there is an urgent need to develop a roller with simple assembly process, strong load-bearing capacity, good protection performance, and reduced bearing rust. Utility Model Content

[0004] The purpose of the utility model is to provide a protective roller, an escalator and a moving walkway, so as to solve the above-mentioned problems existing in the prior art.

[0005] In order to solve the above technical problems, the utility model provides a protective roller, comprising a first annular portion and a second annular portion arranged coaxially, the first annular portion comprising a rim and a hub, the second annular portion comprising a bearing, wherein the rim is arranged on the outer circumferential surface of the hub, the hub is arranged on the outer circumferential surface of the bearing and is fixedly connected to the bearing, the bearing comprises a coaxially arranged bearing outer ring and a bearing inner ring, the hub comprises a hub body, a first side portion and a second side portion, the first side portion and the second side portion are respectively located on both sides of the hub body, and form a accommodating cavity for accommodating the bearing outer ring with the hub body, and the bearing outer ring is embedded in the accommodating cavity.

[0006] Preferably, a first groove and a second groove are provided on the outer ring of the bearing, the first side portion includes a first protrusion, the second side portion includes a second protrusion, the first protrusion is embedded in the first groove, and the second protrusion is embedded in the second groove.

[0007] Preferably, a tapered hole is opened on the first side portion and the second side portion, the tapered hole is coaxial with the wheel rim and the bearing, and the diameter of the tapered hole gradually decreases from the outside to the inside along the axis thereof.

[0008] Preferably, the hub and the rim are made of thermoplastic engineering plastics, such as polyamide (PA), glass fiber reinforced polyamide or polyurethane (TPU).

[0009] Preferably, the roller further comprises a sealing assembly, which is arranged on the outside of the bearing, and the sealing assembly is configured to be engaged with the first annular portion and / or the second annular portion.

[0010] Preferably, the sealing assembly includes a first sealing unit and a second sealing unit, the first sealing unit is located at one end of the first side portion, and the second sealing unit is located at one end of the second side portion.

[0011] Preferably, the first sealing unit includes a third protrusion, the second sealing unit includes a fourth protrusion, and a third groove and a fourth groove are provided on the bearing outer ring or the first annular portion. The third protrusion is embedded in the third groove, and the fourth protrusion is embedded in the fourth groove.

[0012] Preferably, the second sealing unit includes a clamping piece and a sealing outer ring, the fourth protrusion is arranged on the sealing outer ring, one end of the clamping piece is in contact with the bearing, and the other end forms a labyrinthine cavity with the sealing outer ring, and grease is filled in this cavity to enhance the sealing effect.

[0013] Preferably, a first interlocking connection portion is provided on the inner circumference of the wheel hub, and a second interlocking connection portion is provided on the outer circumference of the bearing outer ring, and the first interlocking connection portion cooperates with the second interlocking connection portion to connect the wheel hub to the bearing.

[0014] Preferably, the roller further includes a plurality of reinforcing ribs.

[0015] The present utility model also provides a protective roller, a protective roller comprising a sealing assembly, and a first annular portion and a second annular portion arranged coaxially, wherein the first annular portion comprises a rim and a hub, and the second annular portion comprises a bearing, wherein the rim is arranged on the outer circumferential surface of the hub, and the hub is arranged on the outer circumferential surface of the bearing, and the sealing assembly is arranged to be engaged with the first annular portion and / or the second annular portion.

[0016] The utility model provides a protective roller, comprising a first annular portion and a second annular portion arranged coaxially, the first annular portion comprising a rim, and the second annular portion comprising a bearing, wherein the rim is arranged on the outer circumferential surface of the bearing, the bearing comprising a coaxially arranged bearing outer ring and a bearing inner ring, the rim comprising a rim body, a first side portion and a second side portion, the first side portion and the second side portion being respectively located on both sides of the rim body, and forming a receiving cavity with the rim body for receiving the bearing outer ring, and the bearing outer ring is embedded in the receiving cavity.

[0017] The utility model provides an escalator comprising the protective roller mentioned above.

[0018] The present invention provides a moving walkway comprising the protective roller described above. Since the hub of the roller of the present invention comprises a hub body, a first side portion, and a second side portion, the first side portion, the second side portion, and the hub body form a cavity for accommodating the outer ring of the bearing, allowing the outer ring of the bearing to be embedded in the cavity. In other words, by encasing the hub in a plastic protective layer (the first and second side portions) on both sides of the bearing, the risk of rust on the metal bearing can be reduced. Since the roller of the present invention further includes a sealing assembly disposed outside the bearing, located at one end of the first and second side portions, the bearing is doubly protected, thereby extending the service life of the roller.

[0019] At the same time, because the inner circumference of the hub of the roller of the present invention is provided with a first interlocking connection portion, and the outer circumference of the bearing outer ring is provided with a second interlocking connection portion, the bearing and hub can be integrally formed through an injection molding process. Compared to traditional metal rollers, this eliminates the need for a retaining ring for positioning, greatly simplifying the assembly process and eliminating the risk of missing a retaining ring. Furthermore, the thickness of the bearing outer ring of the roller of the present invention is greater than the thickness of the bearing inner ring, and the bearing outer ring is wider than the bearing inner ring. While maintaining the outer diameter width of a traditional roller, the use of a wider and thicker bearing outer ring enhances the roller's load-bearing capacity and extends its service life. Therefore, the roller of the present invention combines the advantages of traditional plastic rollers and metal rollers, simplifying the assembly process while improving the roller's load-bearing capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 is a cross-sectional view of a roller in one embodiment of the present utility model;

[0022] Figure 2 is a cross-sectional view of a roller in another embodiment of the present invention;

[0023] Figure 3 is a cross-sectional view of a roller in another embodiment of the present invention;

[0024] Figure 4 It is a partial cross-sectional view of the roller bearing in the present utility model;

[0025] Figure 5 It is a partial cross-sectional view of the roller hub in the utility model;

[0026] Figure 6 It is a cross-sectional view of the first sealing unit in the present invention;

[0027] Figure 7 It is a cross-sectional view of the sealing outer ring in the second sealing unit of the present invention.

[0028] Figure 8 This is a cross-sectional view of a roller in another embodiment of the present invention;

[0029] Figure 9 This is a cross-sectional view of a roller in another embodiment of the present invention;

[0030] Figure 10 This is a cross-sectional view of a roller in another embodiment of the present invention;

[0031] Figure 11 This is a cross-sectional view of a roller in another embodiment of the present invention;

[0032] Figure 12 It is a cross-sectional view of a roller in another embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer and more understandable, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0034] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate for the embodiments of the present invention described herein. In addition, the terms "comprises" and "includes," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatuses.

[0035] In the present invention, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "transverse", "longitudinal" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present invention and its embodiments, and are not intended to limit the devices, elements or components indicated to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to the specific circumstances. In addition, the term "multiple" should mean two or more.

[0036] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] This embodiment provides a roller 100 for an escalator or a moving walkway.

[0038] Figure 1 It is a cross-sectional view of a roller in one embodiment of the present utility model. Figure 2 It is a cross-sectional view of a roller in another embodiment of the present invention.

[0039] like Figure 1 As shown, the roller 100 includes a first annular portion and a second annular portion arranged coaxially. The first annular portion includes a rim 10 and a hub 20, and the second annular portion includes a bearing 30. Figure 2 In some embodiments, the first annular portion only includes a rim 10, which is disposed on the outer circumferential surface of the bearing. The rim has a receiving cavity for receiving the outer circumferential surface of the bearing, and the outer ring of the bearing can be embedded in the receiving cavity.

[0040] like Figure 3 As shown, in some embodiments, the roller 100 further includes a sealing assembly 40, which can be engaged with the first annular portion and / or the second annular portion, so that it can be better applied to outdoor escalators. Figure 1 and 2 As shown, the hub 20 is fixedly connected to the bearing 30 and the rim 10. The sealing assembly 40 is disposed on the left and right sides of the bearing 30. The roller 100 may further include a plurality of reinforcing ribs (not shown).

[0041] The wheel rim 10 is mounted on the outer circumference of the wheel hub 20 and is made of thermoplastic engineering plastic, such as polyurethane (TPU). The wheel hub 20 is mounted on the outer circumference of the bearing 30. A first interlocking connection portion is provided on the inner circumference of the wheel hub 20, while a second interlocking connection portion is provided on the outer circumference of the bearing 30. The first and second interlocking connections cooperate to connect the wheel hub 20 to the bearing 30. The first interlocking connection portion of the wheel hub 20 includes one or more first annular protrusions 211. Correspondingly, the second interlocking connection portion of the bearing 30 includes one or more first annular grooves 312.

[0042] Figure 4 It is a partial cross-sectional view of the roller bearing in the utility model.

[0043] like Figure 4 As shown, bearing 30 includes an outer ring 31, an inner ring 32, rolling elements 33, a sealing ring 34, a retainer, and a lubricant. The outer ring 31 and inner ring 32 are coaxially arranged. The rolling elements 33 and the retainer are positioned between the inner ring 32 and the outer ring 31. The retainer encloses and isolates the rolling elements 33. Rolling grooves are provided on the inner circumference of the outer ring 31 and the outer circumference of the inner ring 32. These arcuate rolling grooves are used to accommodate the rolling elements 33. The rolling grooves on the outer ring 31 and the inner ring 32 together form the rolling tracks for the rolling elements 33, and the dimensions of the arcuate rolling grooves match those of the rolling elements 33. In this embodiment, the rolling elements 33 are balls. Lubricant is injected into the rolling tracks and encloses the rolling elements. The lubricant can be grease.

[0044] The thickness of the bearing outer ring 31 is greater than the thickness of the bearing inner ring 32. The width of the bearing outer ring 31 is greater than the width of the bearing inner ring 32. The width of the bearing outer ring 31 is less than the width of the roller hub 20. The width of the outer ring of a standard bearing is consistent with the width of the inner ring, and the thickness of the outer ring of a standard bearing is also relatively close to that of the inner ring. This embodiment improves the roller's load-bearing capacity by increasing the width and thickness of the bearing outer ring 31.

[0045] The second interlocking connection portion on the outer circumferential surface of the bearing outer ring 31 includes one or more first annular grooves 312. In some embodiments, there is only one first annular groove 312. The first annular protrusion engages with the first annular groove 312. During injection molding of the wheel hub 20, the molten plastic enters the first annular groove 312, thereby securely connecting the bearing outer ring 31 of the bearing 30 to the wheel hub 20.

[0046] The inner circumferential surface of the bearing outer ring 31 is provided with a first groove 313, a second groove 314, a third groove 315, and a fourth groove 316. The first groove 313 and the second groove 314 are symmetrical, and portions of the wheel hub 20 are respectively inserted into the first groove 313 and the second groove 314. The third groove 315 and the fourth groove 316 are symmetrical, and portions of the seal assembly 40 are respectively inserted into the third groove 315 and the fourth groove 316.

[0047] Figure 5 It is a partial cross-sectional view of the roller hub in the utility model.

[0048] like Figure 5 As shown, the hub 20 is arranged on the outer circumferential surface of the bearing outer ring of the bearing 30 and is fixedly connected to the bearing 30. The hub 20 is made of thermoplastic engineering plastics, such as polyamide (PA) or glass fiber reinforced polyamide (PA-GF). The hub 20 includes a hub body 21, a first side portion 22 and a second side portion 23. The first side portion 22 and the second side portion 23 are respectively located on the left and right sides of the hub body 21, and form a receiving cavity 24 for accommodating the bearing outer ring 31 with the hub body 21, and the bearing outer ring 31 is embedded in the receiving cavity 24. The first side portion 22 includes a first protrusion 221, and the second side portion 23 includes a second protrusion 231. The first protrusion 221 is embedded in the first groove 313, and the second protrusion 231 is embedded in the second groove 314. In some embodiments, a tapered hole is opened on the first side portion 22 and the second side portion 23 (see Figure 1 ), which is convenient for pressing in the sealing assembly 40. The diameter of the tapered hole gradually decreases from the outside to the inside along its axis.

[0049] The sealing assembly 40 is located on the left and right sides of the bearing 30 and includes a first sealing unit 41 and a second sealing unit 42. The first sealing unit 41 is located at one end of the first side portion 22, and the second sealing unit 42 is located at one end of the second side portion 23.

[0050] Figure 6 It is a cross-sectional view of the first sealing unit in the present invention; Figure 7 It is a cross-sectional view of the sealing outer ring in the second sealing unit of the present invention.

[0051] like Figure 3 、 6As shown in Figures 7 and 8, in some embodiments, the first sealing unit 41 is entirely cover-shaped and can be snapped onto one side of the bearing 30. The second sealing unit 42 has a central through-hole through which the chain pin 200 can pass. The first sealing unit 41 includes a third protrusion 411, and the second sealing unit 42 includes a fourth protrusion 421. The third protrusion 411 is embedded in the third groove 315, and the fourth protrusion 421 is embedded in the fourth groove 316. In some embodiments, the second sealing unit 42 includes a clamping member 422 and a sealing outer ring 423. The fourth protrusion 421 is disposed on the sealing outer ring 423. One end of the clamping member 422 is in contact with the bearing inner ring 32, and the other end forms a labyrinthine cavity with the sealing outer ring 423. Grease is filled into this cavity to enhance the sealing effect. When in use, first press the clamping member 422 and the sealing outer ring 423 into the roller body, then install the roller 100 on the chain pin 200 and stop it with a retaining ring, and finally press the first sealing unit 41 into place.

[0052] In other embodiments, see Figure 12 , the first sealing unit is exactly the same as the second sealing unit.

[0053] In this embodiment, the rim 10 is made of a thermoplastic engineering plastic, such as polyurethane (TPU). The hub 20 is made of a thermoplastic engineering plastic, such as polyamide (PA) or glass fiber reinforced polyamide (PA-GF). The hub 20 and the bearing 30 are integrally formed together with the rim 10 through an injection molding process.

[0054] Because the wheel hub of this embodiment includes a hub body, a first side portion, and a second side portion, the first side portion, the second side portion, and the hub body form a cavity for accommodating the bearing outer ring, allowing the bearing outer ring to be embedded in the cavity. In other words, the plastic protective layer covering both sides of the hub (the first and second side portions) reduces the risk of rust on the metal bearing. Furthermore, because the roller of this invention further includes a sealing assembly disposed outside the bearing, located at one end of the first and second side portions, when the roller is used in outdoor escalators, the bearings can be doubly protected, thereby extending the roller's service life.

[0055] In other embodiments, see Figure 8-11 The first groove 313, the second groove 314, the third groove 315 and the fourth groove 316 may also be provided on the wheel hub, and the roller 100 may not be provided with the first groove 313 and the second groove 314. When the roller 100 is not provided with the first groove 313 and the second groove 314, the sealing assembly 40 may also be provided with a first annular extension portion, which covers the outer surface of the wheel hub and / or the wheel rim ( Figure 11 ).

[0056] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, deformations and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A protective roller, comprising The first annular portion and the second annular portion are coaxially arranged, The first annular portion includes a rim and a hub, and the second annular portion includes a bearing. in, The wheel rim is arranged on the outer circumferential surface of the wheel hub, and the wheel hub is arranged on the outer circumferential surface of the bearing. The bearing comprises a coaxially arranged bearing outer ring and a bearing inner ring. The wheel hub includes a wheel hub body, a first side portion and a second side portion. The first side portion and the second side portion are respectively located on both sides of the wheel hub body and form a receiving cavity with the wheel hub body for receiving the bearing outer ring. The bearing outer ring is embedded in the receiving cavity.

2. The roller according to claim 1, characterized in that It also includes a sealing component, and the sealing component is configured to be engaged with the first annular portion and / or the second annular portion.

3. The roller according to claim 1, characterized in that The bearing is provided with a first groove and a second groove for engaging with the first annular portion.

4. The roller according to claim 3, characterized in that The first side portion includes a first protrusion, the second side portion includes a second protrusion, the first protrusion is embedded in the first groove, and the second protrusion is embedded in the second groove.

5. The roller according to claim 1, characterized in that The first side portion and the second side portion are provided with tapered holes, and the diameter of the tapered holes gradually decreases from the outside to the inside along the axis thereof.

6. The roller according to claim 2, characterized in that: The sealing assembly includes a first sealing unit and a second sealing unit, wherein the first sealing unit is located at one end of the first side portion, and the second sealing unit is located at one end of the second side portion.

7. The roller according to claim 6, characterized in that The first sealing unit is a cover-shaped structure.

8. The roller according to claim 6, characterized in that The first sealing unit includes a third protrusion, and a third groove is provided on the bearing or the first annular portion. The third protrusion is embedded in the third groove.

9. The roller according to claim 6, characterized in that The second sealing unit includes a fourth protrusion, and a fourth groove is provided on the bearing or the first annular portion. The fourth protrusion is embedded in the fourth groove.

10. The roller according to claim 8 or 9, characterized in that: The first sealing unit and / or the second sealing unit include a clamping piece and a sealing outer ring, the third protrusion and / or the fourth protrusion are arranged on the sealing outer ring, one end of the clamping piece is in contact with the bearing, and the other end forms a labyrinth-like cavity with the sealing outer ring.

11. The roller according to claim 10, characterized in that: The clamping member and the sealing outer ring are respectively provided with through holes, and the shaft can pass through the through holes.

12. The roller according to any one of claims 1 to 11, characterized in that: A first interlocking connection portion is provided on the inner circumference of the wheel hub, and a second interlocking connection portion is provided on the outer circumference of the bearing outer ring. The first interlocking connection portion cooperates with the second interlocking connection portion to connect the wheel hub to the bearing.

13. A protective roller comprising A sealing assembly, and a first annular portion and a second annular portion arranged coaxially, The first annular portion includes a rim and a hub, and the second annular portion includes a bearing. in, The wheel rim is arranged on the outer circumferential surface of the wheel hub, the wheel hub is arranged on the outer circumferential surface of the bearing, and the sealing assembly is arranged to be embedded with the first annular portion and / or the second annular portion.

14. A protective roller comprising The first annular portion and the second annular portion are coaxially arranged, The first annular portion includes a rim, and the second annular portion includes a bearing. in, The rim is arranged on the outer circumferential surface of the bearing, The bearing comprises a coaxially arranged bearing outer ring and a bearing inner ring. The rim includes a rim body, a first side portion and a second side portion. The first side portion and the second side portion are respectively located on both sides of the rim body and form a receiving cavity with the rim body for receiving the bearing outer ring. The bearing outer ring is embedded in the receiving cavity.

15. An escalator comprising the roller according to any one of claims 1 to 14.

16. A moving walkway comprising the roller according to any one of claims 1 to 14.

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