Vibration eliminating device of escalator driving chain and escalator

Abstract

The invention discloses a vibration eliminating device of an escalator driving chain. The vibration eliminating device comprises a lever arm, a contact block, a vibration absorbing piece, a partition plate assembly, a stop baffle, a shell and a fixing piece. The contact block is rotatably fixed at the first end of the lever arm, and the partition plate assembly is fixed at the second end of the lever arm; the partition plate assembly is rotatably fixed in the shell and divides the interior of the shell into at least two spaces; the stop baffle is fixed to the shell and provided with a protruding part protruding towards the interior of the shell. The vibration absorption piece is arranged between the partition plate assembly in the shell and the protruding part of the stop baffle. The shell is fixed on a truss structure of the escalator through a fixing piece, and the contact block is placed on at least one row of driving chains under the action of gravity. According to the invention, the chain does not need to be tensioned or any existing design parameter does not need to be changed, the transverse resonance of the driving chain can be reduced or eliminated, and the run-out of the driving chain in operation is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of passenger conveying devices, and in particular to a vibration eliminating device for an escalator drive chain. Background Art

[0002] When an escalator is in operation and a certain number of passengers are on board, the drive chain will experience severe lateral vibration. This vibration will cause a large dynamic load during the high-speed transmission of the drive chain, increasing chain wear and vibration, and even causing tooth skipping, reducing transmission efficiency.

[0003] Chinese patent document CN119079759A discloses a method for reducing or eliminating drive chain vibration by tensioning the drive chain using one or two toothed telescopic mechanisms; raising or moving the main drive unit forward or backward; and adjusting the escalator's operating speed through a controller. However, this technical solution is complex in structure and control, and reduces escalator operating efficiency. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention provides a vibration elimination device for an escalator drive chain, comprising a lever arm, a contact block, a vibration absorbing member, a partition assembly, a stop baffle, a housing and a fixing member;

[0005] The contact block is rotatably fixed to the first end of the lever arm, and the partition assembly is fixed to the second end of the lever arm; the partition assembly is rotatably fixed in the shell to divide the shell into at least two spaces; the stop baffle is fixed on the shell and has a protrusion protruding into the shell; the vibration absorber is arranged between the partition assembly and the protrusion of the stop baffle in the shell; the shell is fixed to the truss structure of the escalator through a fixing member, and the contact block is placed on at least one row of drive chains under the action of gravity.

[0006] Preferably, the partition assembly divides the shell into four identical spaces.

[0007] Preferably, the partition assembly is made of the same material as the lever arm, preferably steel, and is welded and fixed to the lever arm. Preferably, the vibration absorbing member is rubber.

[0008] Preferably, the vibration absorbing rubber is selected by direct testing.

[0009] Preferably, the stiffness and hardness of the vibration absorbing member are selected according to the maximum force at the midpoint of the drive chain, so that the rotation angle of the partition assembly after being subjected to force is smaller than a preset value.

[0010] Preferably, the contact block is made of nylon or other wear-resistant materials.

[0011] Preferably, the contact block is placed at a free edge of the drive chain.

[0012] Preferably, the vibration absorbing member has a groove, and the protrusion of the stop baffle in the shell is inserted into the groove.

[0013] The present invention also provides an escalator comprising the aforementioned vibration eliminating device.

[0014] Compared with the prior art, the present invention does not require chain tensioning or changing any existing design parameters. It only reduces or eliminates the lateral resonance of the drive chain and reduces the vibration of the drive chain during operation by adding a vibration elimination device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0016] Figure 1 This is a partial structural exploded view of the vibration elimination device for the escalator drive chain of Example 1;

[0017] Figure 2 This is an axial cross-sectional view of the interior of the housing of the vibration elimination device for the escalator drive chain of Example 1;

[0018] Figure 3 Schematic diagram of the overall appearance of the vibration elimination device for the escalator drive chain of Example 1;

[0019] Figure 4 This is a schematic diagram of the escalator drive chain vibration elimination device of Example 1 installed in the escalator;

[0020] Figure 5 Schematic diagram of the selection of vibration absorbing components for the vibration elimination device of the escalator drive chain in Example 1;

[0021] Figure 6 Schematic diagram of the force model of the escalator drive chain in Example 1. DETAILED DESCRIPTION

[0022] The following describes the implementation manner of the present invention through specific specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the various details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described 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.

[0023] Example 1

[0024] like Figures 1 to 4 As shown, this embodiment provides a vibration elimination device for an escalator drive chain, comprising a lever arm 1, a contact block 2, a vibration absorbing member 4, a partition assembly 5, a stop baffle 6, a housing 7 and a fixing member 8;

[0025] The contact block 2 is rotatably fixed to the first end of the lever arm 1, and the partition assembly 5 is fixed to the second end of the lever arm 1; the partition assembly 5 is rotatably fixed in the shell 7, dividing the shell 7 into at least two spaces; in this embodiment, the partition assembly 5 divides the shell 7 into four identical spaces; the partition assembly 5 and the lever arm 1 are made of the same material, and the partition assembly 5 is welded to the lever arm 1.

[0026] The stop baffle 6 is fixed to the housing 7 and has a protrusion protruding into the housing 7. The vibration absorbing member 4 is made of rubber and is arranged between the partition assembly 5 in the housing 7 and the protrusion of the stop baffle 6.

[0027] Alternatively, the vibration absorbing member 4 has a groove, and the protrusion of the stopping baffle 6 in the housing 7 is inserted into the groove.

[0028] like Figure 3 and Figure 4 As shown, housing 7 is fixed to the escalator's truss structure (e.g., a truss brace) via fixings 8. Contact block 2 is placed under gravity on at least one row of drive chains 21. Contact block 2 is made of nylon and is placed at the free edge of drive chain 21.

[0029] When the contact block 2 is subjected to chain vibration and transmitted to the lever arm 1, the partition assembly 5 rotates to drive the vibration absorbing member 4 to rotate, and then is squeezed by the stop baffle 6 fixed on the housing, thereby achieving the function of vibration absorption and energy consumption.

[0030] The position of the contact block 2 on the free edge of the drive chain 21 can be changed. The lever arm 1 can be directed towards the step sprocket 22 or the drive sprocket 23; or two contact blocks 2 can be used, one on each of the rollers of the two rows of drive chain 21.

[0031] The natural frequency of the lateral vibration of the drive chain is as follows:

[0032]

[0033] Where f i is the i-th natural frequency of the drive chain, i is the frequency order, L is the free side length of the drive chain, T is the chain tension, and m0 is the mass per unit length of chain. Reducing the free side length L increases the resonance frequency f.

[0034] In this embodiment, the contact block of the vibration elimination device contacts the drive chain, thereby reducing the free edge length, changing the first-order natural vibration mode of the drive chain, and increasing the resonance frequency, thereby reducing or completely eliminating the drive chain resonance caused by passenger load.

[0035] In addition to completely eliminating the first-order resonance mode of the drive chain under specific loads, this embodiment can also reduce or eliminate the jitter in the drive chain. Even slight jitter can be eliminated by rotating the lever arm 1 to drive the diaphragm assembly 5, thereby compressing the vibration absorber 4.

[0036] The selection of vibration absorbing rubber can be done by direct test method, which is to conduct compression test on rubber specimens of specific shape, size, hardness and formula, such as Figure 5 As shown in the figure, the force F and the compression angle δ are directly measured and the F-δ curve is plotted. Furthermore, the relationship between the rotation angle of the diaphragm assembly and the force at the nylon wedge can be obtained.

[0037] During design, the stiffness and hardness of the vibration absorber can be selected according to the maximum force at the midpoint of the drive chain, so that the rotation angle of the partition assembly after the force is applied is less than the preset value, in order to prevent the chain from vibrating. Figure 6 As shown, taking a bus-type escalator as an example, the drive chain tension when the chain resonates is: 17803N. The chord length of the middle part of the chain when it vibrates is about 20-30mm, and the free side length is 1100mm. It can be simply calculated that the force at the midpoint of the chain is 652N-963N.

[0038] The present invention has been described in detail above by way of specific embodiments and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered within the scope of protection of the present invention.

Claims

1. A vibration elimination device for an escalator drive chain, characterized in that: It includes a lever arm, a contact block, a vibration absorbing member, a partition assembly, a stop baffle, a housing and a fixing member; The contact block is rotatably fixed to a first end of the lever arm, and the diaphragm assembly is fixed to a second end of the lever arm; The partition assembly is rotatably fixed in the shell, dividing the shell into at least two spaces; the stop baffle is fixed on the shell and has a protrusion protruding into the shell; the vibration absorber is arranged between the partition assembly and the protrusion of the stop baffle in the shell; the shell is fixed to the truss structure of the escalator through a fixing member, and the contact block is placed on at least one row of drive chains under the action of gravity.

2. The vibration elimination device for the escalator drive chain according to claim 1, characterized in that: The partition assembly divides the shell into four identical spaces.

3. The vibration elimination device for an escalator drive chain according to claim 1, characterized in that: The diaphragm assembly is made of the same material as the lever arm.

4. The vibration elimination device for an escalator drive chain according to claim 1, characterized in that: The vibration absorbing member is made of rubber.

5. The vibration eliminating device for an escalator drive chain according to claim 4, characterized in that: The vibration absorbing rubber is selected through direct testing method.

6. The vibration eliminating device for an escalator drive chain according to claim 4, characterized in that: The stiffness and hardness of the vibration absorbing member are selected according to the maximum force at the midpoint of the drive chain so that the rotation angle of the partition assembly after being subjected to force is less than a preset value.

7. The vibration elimination device for an escalator drive chain according to claim 1, characterized in that: The contact block is made of nylon.

8. The vibration eliminating device for an escalator drive chain according to claim 1, characterized in that: The contact block is placed at the free edge of the drive chain.

9. The vibration eliminating device for an escalator drive chain according to claim 1, characterized in that: The vibration absorbing member is provided with a groove, and the protruding portion of the stopping baffle in the shell is inserted into the groove.

10. An escalator, characterized in that: A vibration elimination device comprising the vibration elimination device according to any one of claims 1 to 9.

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