Step chain suitable for outdoor environment

Abstract

The utility model relates to the field of chains, and particularly discloses a step chain suitable for an outdoor environment. The step chain comprises two chains which are arranged in parallel, and the two chains are connected through a middle connecting assembly. The chain comprises an inner chain link, an outer chain plate and a pin shaft, the inner chain link comprises an inner chain plate and a sleeve, the sleeve is connected with the inner chain plate in a sealed mode, and a roller is arranged outside the sleeve in a sleeved mode. The inner chain links are sequentially connected through the outer chain plates and the pin shafts. A gap is reserved between the sleeve and the pin shaft, and a lubricating cavity is formed; an oil injection hole is formed in the side wall of the sleeve, penetrates through the side wall of the sleeve in the radial direction and is communicated with the lubricating cavity. The step chain has good lubrication and maintenance performance, the probability of occurrence of lubrication failure is effectively reduced, and the service life of the step chain is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of chains, and particularly relates to a step chain applicable to outdoor environments. Background Art

[0002] A chain is a chain-shaped mechanical component used for mechanical transmission, and has the advantages of reliable transmission and large load transmission. A step chain is a type of chain and is one of the important transmission components of an escalator, which can be used for the transmission of the escalator to achieve up and down movement. Compared with traditional chains, the chains in a step chain are usually arranged in pairs, and an intermediate connection component is arranged between the two chains, and the intermediate connection component can be used to connect with a matching step.

[0003] Traditional escalators are mostly used indoors. However, with the development of society, the use of outdoor escalators is also increasing. For example, escalators are gradually popularized in places such as overpasses and open-air subway stations. Compared with the indoor environment, in the outdoor environment, due to sun exposure, rain, wind and sand erosion, the operating conditions of the escalator are more severe. It is very likely that due to the failure of the lubricant or the corrosion of the chain parts, excessive wear between the chain pin and the sleeve will occur, and then the chain will elongate, causing problems such as noise, increased step clearance, and hitting the comb plate, which requires frequent maintenance, short maintenance cycle, frequent maintenance, and large workload, restricting the popular use of outdoor escalators. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a step chain applicable to outdoor environments, which has good lubrication and maintenance performance, effectively reduces the occurrence probability of lubrication failure, and improves the service life of the step chain.

[0005] To solve the above technical problem, the technical solution provided by the utility model is as follows: A step chain applicable to outdoor environments includes two parallel chains, which are connected by an intermediate connection component; each chain includes inner chain links, outer link plates and pins. Each inner chain link includes an inner link plate and a sleeve, the sleeve is hermetically connected to the inner link plate, and a roller is sleeved outside the sleeve; adjacent inner chain links are sequentially connected by outer link plates and pins.

[0006] A gap is left between the sleeve and the pin to form a lubrication cavity; an oil injection hole is provided on the side wall of the sleeve, and the oil injection hole penetrates the side wall of the sleeve in the radial direction and communicates with the lubrication cavity.

[0007] The oil injection hole communicates the lubrication cavity with the outside world, which can balance the internal and external air pressures, ensure that the lubricating oil flows into the lubrication cavity fully and smoothly, ensure sufficient lubrication between the sleeve and the pin, reduce the probability of lubrication failure, and improve the service life of the step chain.

[0008] Preferably, in the axial direction, the oil injection hole is located at the midpoint of the sleeve.

[0009] Preferably, the surfaces of the pin shaft and the sleeve are phosphated.

[0010] After phosphating treatment, the surface of the part has a porous structure, which can improve the adsorption of lubricating oil and endow it with better wear resistance and corrosion resistance.

[0011] Preferably, the clearance between the end of the sleeve and the outer link plate is not greater than 1.5 mm.

[0012] It can reduce the entry of sundries into the lubrication cavity while ensuring the smooth sliding of the chain without jamming.

[0013] Preferably, the pin shaft includes a short pin and a stepped pin. Every 3 - 4 pin shafts along the extension direction of the chain form a group, and each group includes one stepped pin; the arrangement of the short pins and the stepped pins in each group is the same, and the stepped pins between the two chains are opposed left and right; the intermediate connection assembly is connected to the stepped pin, and a roller is connected to the stepped pin.

[0014] Preferably, the stepped pin includes a connection section, and the connection section extends out of the chain. The connection sections of the stepped pins on the two chains are arranged oppositely; the roller is arranged on the connection section.

[0015] Preferably, the intermediate connection assembly includes a stepped shaft and a transition joint, and the two ends of the stepped shaft are respectively connected to the stepped pin through the transition joint.

[0016] Preferably, the transition joint is integrally provided or fixedly connected with the stepped shaft; a plug hole is provided on the transition joint, and the stepped pin is inserted into the plug hole and is detachably connected by a bolt.

[0017] The connection structure between the stepped shaft and the chain is simple and reliable, and the disassembly and assembly operations are convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic structural diagram of the stepped chain applicable to the outdoor environment in this embodiment;

[0019] Figure 2 It is a schematic structural diagram of the cooperation between the chain and the intermediate connection assembly in the stepped chain applicable to the outdoor environment in this embodiment;

[0020] Figure 3 It is a partial structural schematic diagram of the chain in the stepped chain applicable to the outdoor environment in this embodiment;

[0021] Figure 4 It is a schematic structural diagram of the sleeve in the stepped chain applicable to the outdoor environment in this embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] In order to make the objectives, technical solutions and advantages of the present utility model more clearly understood, the present utility model will be 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 used to explain the present utility model and are not used to limit the present utility model. Embodiment

[0023] As Figures 1 - 3 shown, a step chain applicable to outdoor environments includes two chains 1 arranged in parallel, and the two chains 1 are connected by an intermediate connection assembly. The chain 1 includes inner chain links 13, outer link plates 11 and pins 12. The inner chain link 13 includes an inner link plate 131 and a sleeve 132. The sleeve 132 is hermetically connected to the inner link plate 131, and a roller 133 is sleeved outside the sleeve 132. Each of the inner chain links 13 is sequentially connected by an outer link plate 11 and a pin 12. Specifically, the gap between the end of the sleeve 132 and the outer link plate 11 is not greater than 1.5 mm. It can reduce the entry of sundries into the lubrication cavity while ensuring the smooth sliding of the chain 1 without jamming.

[0024] As Figure 3 and Figure 4 shown, a gap is left between the sleeve 132 and the pin 12 to form a lubrication cavity. An oil injection hole 134 is provided on the side wall of the sleeve 132. The oil injection hole 134 penetrates the side wall of the sleeve 132 in the radial direction and communicates with the lubrication cavity. Specifically, in the axial direction, the oil injection hole 134 is located at the midpoint of the sleeve 132.

[0025] The oil injection hole 134 communicates the lubrication cavity with the outside world, can balance the internal and external air pressures, ensure that the lubricating oil flows smoothly into the lubrication cavity, ensure sufficient lubrication between the sleeve 132 and the pin 12, reduce the probability of lubrication failure, and improve the service life of the step chain.

[0026] Furthermore, the surfaces of the pin 12 and the sleeve 132 are phosphated. After phosphating treatment, the surface of the part is a porous structure, which can improve the adsorption of lubricating oil and make it have better wear resistance and corrosion resistance.

[0027] As Figure 1 and Figure 2 shown, the pin 12 includes a short pin and a step pin. The pins 12 are grouped in sets of 3 to 4 along the extending direction of the chain 1, and each set includes one step pin. The arrangement of the short pins and step pins in each group is the same, and the step pins between the two chains 1 are opposed left and right. The intermediate connection assembly is connected to the step pins, and rollers 14 are connected to the step pins. The step pin includes a connection section, the connection section extends out of the chain 1, and the connection sections of the step pins on the two chains 1 are oppositely arranged; the rollers 14 are arranged on the connection section.

[0028] As Figure 1 and Figure 2 shown, the intermediate connection component includes a stepped shaft 3 and a transition joint 2. Both ends of the stepped shaft 3 are respectively connected to the step pins through the transition joint 2. The transition joint 2 is integrally provided or fixedly connected with the stepped shaft 3; a plug hole is provided on the transition joint 2, and the step pin is inserted into the plug hole and detachably connected by bolts. The connection structure between the stepped shaft 3 and the chain 1 is simple and reliable, and the disassembly and assembly operations are convenient.

[0029] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A ladder chain suitable for outdoor environments, comprising two chains arranged in parallel, the two chains are connected by an intermediate connecting assembly; the chain comprises an inner chain link, an outer chain plate and a pin, the inner chain link comprises an inner chain plate and a sleeve, the sleeve is sealed and connected to the inner chain plate, and a roller is disposed on the sleeve outer shell; each of the inner chain links is sequentially connected by an outer chain plate and a pin; Features: A gap is left between the sleeve and the pin shaft to form a lubrication cavity; an oil filling hole is arranged on the side wall of the sleeve, and the oil filling hole is arranged to penetrate the side wall of the sleeve in a radial direction and is communicated with the lubrication cavity.

2. The step chain according to claim 1, characterized in that: In the axial direction, the oil injection hole is located at the midpoint of the sleeve.

3. The step chain according to claim 1, characterized in that: The surfaces of the pin and the sleeve are phosphating treated.

4. The step chain according to claim 1, characterized in that: The gap between the end of the sleeve and the outer link plate is no more than 1.5 mm.

5. The step chain according to any one of claims 1 to 4, characterized in that: The pin shaft includes short pins and step pins. The pin shafts are arranged in groups of 3 to 4 along the extension direction of the chain, and each group includes a step pin. The short pins and step pins in each group are arranged in the same way, and the step pins between the two chains are opposite to each other on the left and right. The intermediate connecting assembly is connected to the step pin, and the step pin is connected to a roller.

6. The step chain according to claim 5, characterized in that: The step pin comprises a connecting section, the connecting section extends out of the chain, and the connecting sections of the step pins on two chains are arranged opposite to each other; the roller is arranged on the connecting section.

7. The step chain according to claim 5, characterized in that: The intermediate connection assembly comprises a step shaft and a transition joint, and both ends of the step shaft are respectively connected to the step pin through the transition joint.

8. The step chain according to claim 7, characterized in that: The transition joint is integrally arranged with or fixedly connected to the step shaft; a plug hole is provided on the transition joint, and the step pin is inserted into the plug hole and is detachably connected by bolts.

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