Low-vibration roller external step chain and passenger conveyor

Abstract

The application discloses a low-vibration external roller step chain, which comprises a plurality of rollers and a plurality of damping mechanisms. A roller is fixed at the connection position of every several chain links, and the roller is fixed outside the chain plate and close to the guide rail side of the ladder. A damping mechanism is arranged between every two rollers, and the damping mechanism is fixed on the middle chain link between the two rollers. The middle chain link refers to the chain link close to the middle of the plurality of chain links between the two rollers, and the fixing position of the damping mechanism is on the same side of the roller. When the passenger conveying device operates, the damping mechanism is in contact with and slides along the guide rail of the ladder of the passenger conveying device, and the gravity of the step chain can be supported by the damping mechanism through the guide rail of the ladder. Compared with the prior art, the damping mechanism is added, the downward overhanging distance of the step chain between unit steps is improved, and the damping mechanism also helps to improve the vibration and noise of the step chain during operation.

Description

Technical Field

[0001] This invention relates to the field of passenger transport devices, and more particularly to a low-vibration roller external ladder chain and passenger transport device. Background Technology

[0002] In the prior art, escalators and moving walkways are usually referred to as passenger transport devices. Passenger transport devices are usually driven by chains, and the chain that fixes and drives the steps is called the step chain.

[0003] Currently, ladder chains are divided into two types: those with external rollers and those with internal rollers. In ladder chains with internal rollers, the rollers are located inside the chain plates, achieving transmission through the meshing of the rollers with the sprockets; however, the rollers generally have a shorter lifespan. In ladder chains with external rollers, the rollers are located outside the chain plates, achieving transmission through the meshing of the rollers with the sprockets; the rollers generally have a longer lifespan. Ladder chains with internal rollers contain multiple rollers per ladder pitch, for example, three rollers, while ladder chains with external rollers contain only one roller per ladder pitch. Therefore, ladder chains with external rollers have a longer overhang length, resulting in greater vibration and noise during operation, as illustrated in published patent documents CN201710982144.5 and CN201721354680.2. Therefore, how to reduce the vibration and noise of ladder chains with external rollers during operation is a technical problem facing this field. Summary of the Invention

[0004] The summary of this invention introduces a series of simplified concepts, all of which are simplifications of existing technologies in the field, and will be further explained in detail in the detailed description section. This summary is not intended to limit the key features and essential technical features of the claimed technical solution, nor is it intended to determine the scope of protection of the claimed technical solution.

[0005] To solve the above technical problems, the present invention provides a low-vibration roller external ladder chain, which is composed of multiple chain links connected in sequence. Each chain link includes a pair of chain plates. The chain links are rotatably fixed by a pin and a sleeve. At least part of the sleeve is covered with rollers. The rollers can mesh with the sprockets of the passenger conveying device to achieve the purpose of transmission. The ladder chain also includes multiple rollers and multiple damping mechanisms.

[0006] A roller is fixed at the joint of every few chain links. The roller is fixed to the outside of the chain plate near the ladder guide rail. There is a damping mechanism between every two rollers. The damping mechanism is fixed on the middle chain link between the two rollers. The middle chain link refers to the chain link closest to the middle among the multiple chain links between the two rollers. The damping mechanism is fixed on the same side as the roller.

[0007] When the passenger conveyor is in operation, the damping mechanism contacts and slides with the ladder guide rail of the passenger conveyor, and the gravity part of the ladder chain can be supported by the damping mechanism through the ladder guide rail.

[0008] Preferably, there are 3 chain links between the two rollers.

[0009] Preferably, the damping mechanism consists of a first contact member, a second contact member, an elastic member, a guide member, a connector, and a fastener; the first contact member has a first sliding surface, and the second contact member has a second sliding surface. When the passenger conveying device is running, the first sliding surface contacts the upper stairway guide rail, and the second sliding surface contacts the lower stairway guide rail.

[0010] Preferably, the connector is C-shaped, with a through hole in the middle for fixing to the chain link, and through holes at the top and bottom for the guide to pass through; the guide and fasteners fix the second contact, the elastic element and the first contact to the connector;

[0011] Preferably, the first sliding surface and the second sliding surface are polymer sliding layers made of wear-resistant materials with a low coefficient of friction.

[0012] Preferably, the elastic element is a spring or rubber.

[0013] The present invention also provides a passenger transport device having two ladder chains and two ladder guide rails, wherein the ladder chains are the aforementioned low-vibration roller external ladder chains.

[0014] Preferably, the ladder guide rail is located inside the ladder chain.

[0015] Preferably, the ladder guide rail is located on the outside of the ladder chain.

[0016] Compared with the prior art, the present invention adds a damping mechanism. When the passenger conveyor is running, the gravity part of the step chain can be supported by the damping mechanism through the ladder guide rail, which improves the downward suspension distance of the step chain between unit steps. At the same time, the damping mechanism also helps to improve the vibration and noise of the step chain during operation. Attached Figure Description

[0017] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0018] Figures 1 to 3 This is a schematic diagram of the structure of the low-vibration roller external ladder chain in Example 1;

[0019] Figure 4 This is a schematic diagram of the damping mechanism structure in Example 1. Detailed Implementation

[0020] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0021] Example 1

[0022] like Figures 1 to 3 As shown, this embodiment 1 provides a low-vibration roller external ladder chain. The ladder chain is composed of multiple chain links 1 connected in sequence. Each chain link 1 includes a pair of chain plates 11. The chain links 1 are rotatably fixed to the sleeves 9 by pins 2. At least part of the sleeves 9 are covered with rollers 3. The rollers 3 can mesh with the sprockets of the passenger conveying device to achieve the purpose of transmission.

[0023] A roller 4 is fixed at the joint of every few chain links; in this embodiment, a roller 4 is fixed every three chain links. The roller 4 is fixed to the outside of the chain plate 11 near the ladder guide rail 5. The positional relationship between the ladder guide rail 5 and the step chain is determined by the ladder structure of the passenger transport device. The ladder structure of the passenger transport device is as follows: the ladder has circulating ladder guide rails, including an upper ladder guide rail and a lower ladder guide rail. The upper ladder guide rail is used to carry and guide the steps when the passenger transport device is carrying passengers, and the lower ladder guide rail is used to carry and guide the steps when the passenger transport device is returning. The passenger transport device typically has two circulating step chains and two circulating ladder guide rails. One structure is that the ladder guide rail 5 is located inside the step chain... Figure 1 As shown, another configuration has the ladder guide rail on the outside of the ladder chain. The ladder shaft 7 passes through the center of the roller 4, and the ladder steps are usually fixed to the ladder shaft 7.

[0024] The ladder chain also includes multiple damping mechanisms 6, with one damping mechanism 6 between every two rollers. The damping mechanism 6 is fixed to an intermediate link between the two rollers. The intermediate link refers to the link closest to the middle among the multiple links between the two rollers. For example, in this embodiment, if there are three links between the two rollers, it is the middle link; if there are four links, it can be any one of the two middle links. The damping mechanism 6 is fixed on the same side as the roller 4.

[0025] like Figure 3 and Figure 4 As shown, the damping mechanism 6 consists of a first contact 61, a second contact 62, an elastic element 63, a guide 64, a connector 65, and a fastener 66. In this embodiment, the connector 65 is C-shaped, with a through hole in the middle for fixing to the chain link, and through holes at the top and bottom for the guide 64 to pass through. The second contact 62, the elastic element 63, and the first contact 61 are fixed to the connector 65 by the guide 64 and the fastener 66. The elastic element 63 is a spring or rubber, or other damping elastic material. The first contact 61 has a first sliding surface 611, and the second contact 62 has a second sliding surface 621. When the passenger conveyor is running, the roller contacts the stair rail, the first sliding surface 611 contacts the upper stair rail, and the second sliding surface 621 contacts the lower stair rail. The first sliding surface 611 and the second sliding surface 621 are polymer sliding layers made of a wear-resistant material with a low coefficient of friction. When the passenger transport device is in operation, the weight of the ladder chain can be supported by the damping mechanism through the ladder guide rail, which improves the downward suspension distance of the ladder chain between units of ladder chain. At the same time, the damping mechanism also helps to improve the vibration and noise of the ladder chain during operation.

[0026] Example 2

[0027] This embodiment provides a passenger transport device comprising two low-vibration roller external ladder chains as described in Embodiment 1.

[0028] The passenger conveyor has two circulating stair rails; one configuration places the stair rails inside the step chain, such as... Figure 1 As shown, another structure has the ladder guide rail located on the outside of the ladder chain. Along the operating direction of the passenger conveyor, the side closer to the center of the passenger conveyor is the inner side, and the side farther from the center of the passenger conveyor is the outer side.

[0029] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A low-vibration roller external ladder chain, comprising multiple chain links connected sequentially, each chain link including a pair of chain plates, the chain links being rotatably fixed by a pin and a sleeve, at least a portion of the sleeve being fitted with rollers, the rollers being able to mesh with a sprocket of a passenger conveying device to achieve transmission, characterized in that: The ladder chain also includes multiple rollers and multiple damping mechanisms; A roller is fixed at the joint of every few chain links, and the roller is fixed to the outside of the chain plate near the ladder guide rail; There is a damping mechanism between every two rollers. The damping mechanism is fixed on the intermediate link between the two rollers. The intermediate link is the link closest to the middle among the multiple links between the two rollers. The damping mechanism is fixed on the same side as the roller. When the passenger conveyor is in operation, the damping mechanism contacts and slides with the ladder guide rail of the passenger conveyor, and the gravity part of the ladder chain can be supported by the damping mechanism through the ladder guide rail; The damping mechanism consists of a first contact element, a second contact element, an elastic element, a guide element, a connecting element, and fasteners. The first contact element has a first sliding surface, and the second contact element has a second sliding surface. When the passenger conveyor is running, the first sliding surface contacts the upper stairway guide rail, and the second sliding surface contacts the lower stairway guide rail. The connector is C-shaped, with a through hole in the middle for fixing to the chain link, and through holes at the top and bottom for the guide to pass through; the guide and fasteners fix the second contact, the elastic element and the first contact to the connector.

2. The low-vibration roller external ladder chain according to claim 1, characterized in that: There are 3 chain links between the two rollers.

3. The low-vibration roller external ladder chain according to claim 1, characterized in that: The first and second sliding surfaces are polymer sliding layers made of wear-resistant materials with a low coefficient of friction.

4. The low-vibration roller external ladder chain according to claim 1, characterized in that: The elastic element is a spring or rubber.

5. A passenger conveying device comprising two ladder chains and two ladder guide rails, characterized in that: The ladder chain is the low-vibration roller external ladder chain as described in any one of claims 1 to 4.

6. The passenger transport device according to claim 5, characterized in that: The ladder guide rail is located inside the ladder chain.

7. The passenger transport device according to claim 5, characterized in that: The ladder guide rail is located on the outside of the ladder chain.

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