CN210884857U - Chain wheel of escalator or pedestrian path with buffer - Google Patents

Abstract

A sprocket for an escalator or a pedestrian walkway having a buffer, the sprocket having a plurality of sprocket teeth disposed on an outer circumference thereof, a sprocket tooth groove disposed between adjacent two sprocket teeth; the sprocket tooth slot having planar portions and arcuate portions connected between the planar portions; wherein the buffer is provided in the planar portion; the pin bushings of the chain of the escalator or walkway can be in contact with the buffers provided in the planar portion.

Description

Chain wheel of escalator or pedestrian path with buffer

Technical Field

The present disclosure relates to a sprocket for an escalator or pedestrian walkway having a buffer.

Background

For escalators or walkways, heavy duty step chains typically use an outer roller chain with plastic rollers on the outside of the links, see fig. 1. The plastic rollers run on the guide rails, and pin bushings of the chain are meshed with step chain wheels on the escalator or the pedestrian path reverser.

Since the pin bushings of the step sprocket and the chain are made of metal, there is a great noise and vibration when the escalator or the pedestrian walkway is operated. Many escalator or pedestrian walkway companies use various shaped cushions to reduce noise and vibration. But all solutions do not fully solve the problem of noise and vibration because the pin bushings of the chain engage all surfaces of the sprocket tooth spaces of the sprocket.

The prior art solution is to add a cushion pad (e.g. JP58017250A) at the bottom of the sprocket tooth slot, see fig. 2. However, both the arcuate and flat portions of the sprocket tooth slot may contact the pin bosses, and thus this solution does not address the noise and vibration issues.

Other solutions add two cushions to the arc of the sprocket tooth slot, see fig. 3. But this solution does not avoid the pin bushings impacting the flat portion of the tooth slot.

SUMMERY OF THE UTILITY MODEL

To address the deficiencies and drawbacks of the prior art, the present disclosure provides a sprocket for an escalator or pedestrian walkway having an improved buffer layout.

According to one aspect of the present disclosure, there is provided a sprocket for an escalator or a pedestrian walkway having a buffer, the sprocket being provided on an outer circumference thereof with a plurality of sprocket teeth, a sprocket tooth groove being provided between adjacent two sprocket teeth; the sprocket tooth slot having planar portions and arcuate portions connected between the planar portions; disposing the bumper in the planar portion; the pin bushings of the chain of the escalator or walkway can be in contact with the buffers provided in the planar portion.

According to the above aspect of the present disclosure, the bumper is embedded in the planar portion and a part of the bumper protrudes from the planar portion.

According to the above aspects of the present disclosure, a portion of the bumper protrudes from the planar portion by 1.0mm to 2.0 mm.

According to the above aspects of the present disclosure, a cushion pad (e.g., made of plastic) is provided in the arc portion. Of course, the bumper according to the present disclosure may also be disposed in the arc portion.

According to the above aspects of the present disclosure, the buffer includes a first portion, a second portion, and an annular groove portion between the first portion and the second portion.

According to the above aspects of the present disclosure, a threaded hole is provided on the top surface of the first portion.

According to the above aspects of the present disclosure, the first portion and the second portion are cylindrical; the diameter of the first portion is smaller than the diameter of the second portion.

According to the above aspects of the present disclosure, a mounting hole is provided in the planar portion; the second portion of the bumper is interference fit in the mounting hole and a portion of the first portion of the bumper protrudes from the mounting hole; the diameter of the mounting hole is larger than the diameter of the first portion.

According to the above aspects of the present disclosure, the bumper is made of a plastic material.

By adopting the above-described novel arrangement and structure of the buffer, the pin bush of the metal step chain does not touch the flat portion and the arc portion of the tooth groove of the step sprocket, which can reduce noise and vibration, thereby improving riding comfort.

A buffer according to the present disclosure includes a first portion, a second portion, and an annular slot portion between the first portion and the second portion to facilitate maintenance removal of an old buffer.

The diameter of the first portion of the buffer being smaller than the diameter of the second portion of the buffer is suitable for deformation of the buffer under roller pressure.

By providing a threaded hole on the top surface of the first portion and a mounting hole in the planar portion having a diameter greater than the diameter of the first portion, special tools can be used to remove the bumper for maintenance and replacement.

So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.

As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.

Drawings

The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.

FIG. 1 shows a schematic view of a prior art chain and sprocket fit;

FIG. 2 shows a prior art bumper positioned at the bottom of the arcuate portion of the sprocket tooth slot;

FIG. 3 illustrates two prior art bumpers provided in the arcuate portion of a sprocket tooth slot;

FIG. 4 shows two bumpers provided in the flat portion of the sprocket tooth slot in accordance with the present disclosure;

fig. 5 illustrates a perspective view of a buffer according to the present disclosure.

Detailed Description

Fig. 1 shows a schematic view of a prior art chain and sprocket fit. For escalators or walkways, heavy-duty step chains typically use an outer roller chain with plastic rollers 1 on the outside of the chain links 2, see fig. 1. The plastic rollers 1 run on guide rails 3, and pin bushings 4 of the chain mesh with step sprockets 5 on the escalator or the pedestrian path reverser.

Since the step sprocket 5 and the pin bosses 4 of the chain are made of metal, there is a great noise and vibration when the escalator or the pedestrian path is operated. Many escalator or pedestrian walkway companies use various shaped cushions to reduce noise and vibration. But all solutions do not fully solve the problem of noise and vibrations, since the pin bushings 4 of the chain engage all surfaces of the sprocket tooth grooves 6 of the sprocket 5.

The prior art solution is to add a cushion pad 7 (e.g. JP58017250A) at the bottom of the sprocket tooth slot 6, see fig. 2. However, both the arcuate portion 6-2 and the flat portion 6-1 of the sprocket tooth slot 6 may contact the pin bosses 4, and therefore this solution does not address the noise and vibration issues.

Other solutions are to add two cushions 7 to the arc-shaped part 6-2 of the sprocket tooth slot 6, see fig. 3. But this solution does not avoid the pin bosses 4 impacting the flat portions 6-1 of the tooth slot.

Embodiments of the present disclosure are described in detail below with reference to fig. 4 and 5, wherein the same reference numerals as in fig. 1 to 3 denote the same or similar components.

According to one embodiment of the present disclosure, there is provided a sprocket 5 of an escalator or a pedestrian walkway having a buffer 8, the sprocket 5 being provided with a plurality of sprocket teeth 5-1 on an outer circumference thereof, and a sprocket tooth groove 6 between adjacent two sprocket teeth 5-1.

The sprocket tooth slot 6 has flat portions 6-1 and arcuate portions 6-2 connected between the flat portions 6-1.

The buffers 8 are provided in the planar portion 6-1 (two buffers 8 are provided in two planar portions, respectively, in fig. 4). The pin bushings 4 of the chain of the escalator or travelator can be in contact with the buffers 8 arranged in the plane part 6-1.

According to the above-described embodiment of the present disclosure, the bumper 8 is embedded in the planar portion 6-1 and a portion of the bumper 8 protrudes from the planar portion 6-1.

According to the above-described respective embodiments of the present disclosure, a portion of the buffer 8 protrudes from the plane portion 6-1 by 1.0mm to 2.0 mm.

According to the above-described respective embodiments of the present disclosure, a cushion pad 7 is provided in the arc portion 6-2. Of course, the bumper 8 according to the present disclosure may also be provided in the arc portion 6-2.

According to the various embodiments of the present disclosure described above, the buffer 8 includes a first portion 8-1, a second portion 8-2, and an annular slot portion 8-3 located between the first portion 8-1 and the second portion 8-2, as shown in FIG. 5.

According to the above-described various embodiments of the present disclosure, a threaded hole 9 is provided on the top surface of the first portion 8-1.

According to the various embodiments of the present disclosure described above, the first portion 8-1 and the second portion 8-2 are cylindrical. The diameter of the first portion 8-1 is smaller than the diameter of the second portion 8-2.

According to the above-described respective embodiments of the present disclosure, the mounting hole 6-3 is provided in the plane part 6-1.

The second portion 8-2 of the bumper 8 is interference fit in the mounting hole 6-3 and a portion of the first portion 8-1 of the bumper 8 protrudes from the mounting hole 6-3.

The diameter of the mounting hole 6-3 is larger than the diameter of the first portion 8-1.

According to the above-described various embodiments of the present disclosure, the bumper 8 is made of a plastic material.

While the invention has been described in the specification and illustrated in the drawings with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention as defined in the claims. Moreover, the combination and arrangement of features, elements and/or functions between specific embodiments herein is clearly apparent and thus, in light of this disclosure, one skilled in the art will appreciate that features, elements and/or functions of an embodiment may be incorporated into another specific embodiment as appropriate, unless described otherwise, above. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the foregoing description and the appended claims.

Claims (9)

1. A sprocket for an escalator or a pedestrian walkway having a buffer, the sprocket having a plurality of sprocket teeth disposed on an outer circumference thereof, a sprocket tooth groove disposed between adjacent two sprocket teeth;

the sprocket tooth slot having planar portions and arcuate portions connected between the planar portions;

it is characterized in that the preparation method is characterized in that,

disposing the bumper in the planar portion;

the pin bushings of the chain of the escalator or walkway can be in contact with the buffers provided in the planar portion.

2. The sprocket as set forth in claim 1,

the bumper is embedded in the planar portion and a portion of the bumper protrudes from the planar portion.

3. The sprocket as set forth in claim 2,

a portion of the bumper protrudes from the planar portion by 1.0mm to 2.0 mm.

4. The sprocket as set forth in claim 1,

a cushion is disposed in the arcuate portion.

5. Sprocket according to one of claims 1 to 4,

the buffer includes a first portion, a second portion, and an annular slot portion between the first portion and the second portion.

6. The sprocket as set forth in claim 5,

a threaded hole is provided on a top surface of the first portion.

7. The sprocket as set forth in claim 5,

the first and second portions are cylindrical;

the diameter of the first portion is smaller than the diameter of the second portion.

8. The sprocket as set forth in claim 7,

providing a mounting hole in the planar portion;

the second portion of the bumper is interference fit in the mounting hole and a portion of the first portion of the bumper protrudes from the mounting hole;

the diameter of the mounting hole is larger than the diameter of the first portion.

9. The sprocket as set forth in claim 1,

the bumper is made of a plastic material.

Images