Chain driving structure of sidewalk pedal

Abstract

The utility model relates to the technical field of escalators, in particular to a chain driving structure of a sidewalk pedal. According to the scheme, the bearing linkage shaft used for being connected and matched with the pedal is rotatably arranged in the middle of the chain piece, and the bearing linkage shaft is rotatably connected and matched with the side portion of the pedal. Due to the fact that the bearing link shaft is fixed in the middle of the chain piece, a sleeve and a corresponding connecting structure do not need to be arranged on the chain link shaft, the diameter of the chain link shaft can be kept unchanged, the size of the idler wheel and the size of the bearing can be commonly used with a standard chain, large-size inner holes and large-size bearings do not need to be specially customized, and therefore the universality of the chain is improved.

Description

Technical Field

[0001] This utility model relates to the field of escalator technology, specifically to a chain drive structure for a pedestrian walkway tread. Background Technology

[0002] In the design of chain-driven structures for pedestrian walkways, the chain is the key component for transmitting power and motion. Existing chain-driven structures typically use a combination of chain links and chain axles to achieve pedal movement. Specifically, such as... Figure 1 As shown, in a widely used scheme, a sleeve 1 is provided on the link shaft 120 of each chain link. One end of this sleeve 1 extends to the outside of the chain link 2, and its main function is to connect and cooperate with the pedal, thereby realizing the power transmission between the pedal and the chain.

[0003] However, this traditional design presents some technical challenges. Because rollers need to be mounted on the outside of the link shaft 120 to support and guide the chain, the overall diameter of the link shaft 120 must be increased at the location where the sleeve 1 is installed. This increase in diameter leads to the following problems:

[0004] 1. At the link shaft 120 where the sleeve 1 is located, in order to accommodate the increased shaft diameter, the installed roller needs to have a larger inner hole, and a larger bearing must be installed. This not only increases the design and manufacturing difficulty, but also increases the cost.

[0005] 2. Due to the increased diameter of the link shaft 120, certain parts of the chain are incompatible with the link shafts in the non-sleeve sections, limiting the chain's versatility. Maintaining and replacing the chain requires finding chains of specific sizes, increasing the complexity and cost of maintenance.

[0006] Therefore, existing chain-driven structures have certain limitations in terms of versatility, cost, and maintenance. Utility Model Content

[0007] To solve the above problems, this utility model discloses a chain drive structure for a sidewalk tread.

[0008] To achieve the above objectives, this application discloses a chain drive structure for a sidewalk treadmill, wherein the chain includes multiple links, each link including paired and parallel inner chain plates, paired and parallel outer chain plates for connecting the inner chain plates of two adjacent links, a link shaft for rotatably connecting the inner chain plates and the outer chain plates, and a roller rotatably mounted on the link shaft. A load-bearing link shaft for connecting and engaging with the treadmill is provided in the middle of the inner chain plates and / or the outer chain plates, and the load-bearing link shaft is rotatably connected and engaged with the side of the treadmill.

[0009] The load-bearing link shaft spans two paired inner chain plates, with one end extending to the outside of the inner chain plate and used for connection and engagement with the pedal.

[0010] Both ends of the bearing link shaft have a limiting groove along its circumference. When the bearing link shaft is installed in the inner chain piece, the limiting groove is located on the outside of the inner chain piece, and a retaining spring is provided on the outer sleeve of the limiting groove to limit the chain link.

[0011] The load-bearing link shaft has a hollow structure.

[0012] The sprocket that meshes with the chain is provided with a clearance groove that aligns with the chain link shaft. The clearance groove is located on the teeth of the sprocket and is distributed at intervals along the circumference of the sprocket.

[0013] The solution of this application has a load-bearing link shaft provided in the middle of the inner and / or outer chain links for connecting and engaging with the pedal. The load-bearing link shaft is rotatably connected to the side of the pedal. Since the load-bearing link shaft is fixed in the middle of the chain link, there is no need to set a sleeve and a corresponding connecting structure on the chain link shaft. Therefore, the diameter of the chain link shaft can remain unchanged, and the size of the roller and bearing can be used with standard chains without the need for specially customized large-sized inner holes and bearings, thereby improving the versatility of the chain. Attached Figure Description

[0014] Figure 1 A schematic diagram of a widely used structure that incorporates a sleeve on the link shaft of a chain;

[0015] Figure 2 This is a schematic diagram of the overall structure of the pedal and chain in an embodiment of this application;

[0016] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0017] Figure 4 This is a schematic diagram of the structure carrying the connecting shaft in an embodiment of this application;

[0018] Figure 5 This is a schematic diagram of the sprocket structure in an embodiment of this application. Detailed Implementation

[0019] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that the following specific embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, and the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0020] Example: Figure 1-5As shown, a chain drive structure for a sidewalk tread includes a chain comprising multiple links. Each link includes a pair of parallel inner chain plates 100, a pair of parallel outer chain plates 110 for connecting the inner chain plates of two adjacent links, a link shaft 120 for hingedly connecting the inner and outer chain plates, and a roller 130 rotatably mounted on the link shaft. A load-bearing link shaft 140 for connecting and engaging with the tread is provided at the middle portion of the inner chain plates 100 and / or the outer chain plates 110. The load-bearing link shaft is rotatably connected and engaged with the side portion of the tread.

[0021] Since the load-bearing link shaft 140 is fixed in the middle of the chain link, there is no need to install the sleeve 1 on the link shaft 120, so the diameter of the link shaft 120 can remain unchanged. This allows the rollers and bearings to be of the same size as standard chains, eliminating the need for specially customized large-sized inner holes and bearings, thus improving the chain's versatility. At the same time, it eliminates the need to install large-sized bearings in specific locations, reducing material and processing costs. Bulk procurement of standardized bearings and rollers also helps reduce costs.

[0022] Furthermore, the link pin of a traditional chain is the main load-bearing point. By fixing the load-bearing link pin 140 to the middle of the chain link, rather than at the usual link pin, the load can be distributed more evenly along the chain. This also helps reduce wear on the chain links and pins, extending the chain's lifespan.

[0023] In a specific design, the connection method between the load-bearing link shaft 140 and the side of the pedal can include:

[0024] Bearing connection method:

[0025] A bearing housing is provided on the side of the pedal, and one end of the bearing connecting shaft 140 is mounted in the bearing housing via a bearing.

[0026] The bearing allows the load-bearing link shaft 140 to rotate freely on the side of the pedal while bearing the weight of the pedal and the load during movement.

[0027] Keyway mating method:

[0028] The load-bearing connecting shaft 140 is designed with a keyway, and the side of the pedal is provided with a corresponding keyway hole.

[0029] A rotating connection between the load-bearing link shaft 140 and the pedal is achieved by inserting a key into the keyway and keyway hole.

[0030] This method prevents axial movement while allowing rotation.

[0031] Bolted connection with flange:

[0032] The end of the bearing link shaft 140 is provided with a flange, and the side of the pedal is provided with a corresponding flange hole.

[0033] The flange supporting the connecting shaft 140 is connected to the flange hole of the pedal using bolts and nuts to achieve a rotatable connection.

[0034] In the above scheme, the load-bearing link shaft 140 spans two paired inner chain plates 100, and one end of it extends to the outside of the inner chain plates and is used to connect and cooperate with the pedal. The load-bearing link shaft 140 spans two inner chain plates 100, which makes the connection between the pedal and the chain more stable and helps to reduce the swaying of the pedal during movement.

[0035] The two ends of the bearing link shaft 140 are provided with a limiting groove 150 along its circumference. When the bearing link shaft is installed in the inner chain piece, the limiting groove is located on the outside of the inner chain piece, and a retaining spring 160 is provided on the outer side of the limiting groove to limit the chain link.

[0036] During installation, the load-bearing link shaft 140 is first passed through the shaft hole of the inner link plate.

[0037] The retaining ring 160 is then compressed and fitted into the limiting groove 150. The elasticity of the retaining ring 160 ensures it is firmly locked within the limiting groove, thus fixing the position of the load-bearing connecting shaft 140. Through the combination of the limiting groove 150 and the retaining ring 160, the load-bearing connecting shaft 140 is reliably positioned axially, preventing axial movement and improving connection stability. The design of the retaining ring 160 makes the installation and removal of the load-bearing connecting shaft 140 simple and quick, while also facilitating future maintenance and replacement.

[0038] The load-bearing link shaft 140 has a hollow structure. The hollow structure can reduce the weight of the load-bearing link shaft 140, which is beneficial to the overall weight reduction of the chain.

[0039] The sprocket 170 that meshes with the chain is provided with a clearance groove 180 that aligns with the chain link shaft. The clearance groove is located on the teeth of the sprocket and is distributed at intervals in the circumferential direction of the sprocket.

[0040] The sprocket 170 is a component that meshes with the chain in the pedestrian walkway tread chain drive structure, used to transmit power and motion. The teeth of the sprocket 170 have a clearance groove 180 that aligns with the chain link shaft. The clearance groove 180 is designed to allow the chain link shaft (i.e., the load-bearing link shaft 140) to pass smoothly during chain operation, avoiding interference with the sprocket teeth.

[0041] In the specific implementation process, the distribution interval of the clearance groove 180 is calculated based on the number of teeth of the sprocket 170 and the number of chain links.

[0042] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A chain drive structure of a sidewalk board, wherein the chain comprises a plurality of links, each link comprising a pair of inner links (100) arranged in pairs and parallel to each other, a pair of outer links (110) arranged in pairs and parallel to each other for connecting the inner links of two adjacent links, a link shaft (120) for rotationally connecting the inner links and the outer links, and a roller (130) rotationally arranged on the link shaft, characterized in that, A bearing link shaft (140) is arranged in the middle part of the inner chain link (100) and / or the outer chain link (110) for connecting with the pedal, and the bearing link shaft is rotatably connected with the side part of the pedal.

2. The chain drive structure according to claim 1, characterized by, The bearing link shaft (140) is arranged across the two inner chain links (100), and one end of the bearing link shaft extends to the outside of the inner chain link and is used for connecting with the pedal.

3. The chain drive structure of claim 1, wherein, Two ends of the bearing link shaft (140) are provided with a limiting groove (150) along the circumferential direction, the limiting groove is located outside the inner chain link when the bearing link shaft is installed in the inner chain link, and a clamping spring (160) is sleeved outside the limiting groove to limit the chain link.

4. Chain drive structure according to any one of claims 1-3, characterized in that, The bearing link shaft (140) is in a hollow structure.

5. The chain drive structure of claim 1, wherein, A chain wheel (170) engaged with the chain is provided with an avoiding groove (180) matched with the shaft of the chain link, the avoiding groove is located in the tooth part of the chain wheel and is distributed on the circumferential direction of the chain wheel.

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