Driving main shaft assembly of escalator

Abstract

The invention discloses a driving main shaft assembly of an escalator. The driving main shaft assembly comprises a hollow main shaft, a bearing, an end cover, a main chain wheel hub, a step chain wheel hub and a handrail chain wheel hub, the hollow main shaft is a single main shaft; inner rings at two ends of the hollow main shaft are provided with step surfaces, and outer rings of the bearings are mounted in the step surfaces; an outer cylindrical surface is arranged in the middle of the end cover, and an inner ring of the bearing is mounted on the outer cylindrical surface; the end cover is fixed on an escalator truss; and the main chain wheel hub, the step chain wheel hub and the handrail chain wheel hub are fixed on the hollow main shaft. The escalator driving main shaft assembly is small in mass, and the shaft end structure is greatly simplified.

Description

Technical Field

[0001] The invention relates to the technical field of escalators, and in particular to a driving spindle assembly of an escalator. Background Art

[0002] In the prior art, most escalator drive shafts are made of solid round steel, and some are a combination of a hollow shaft and solid round steel. The two types of shaft structures have a large mass, the solid round steel processing technology is complex, and the drive shaft end structure is relatively complex, resulting in high costs for the drive shaft assembly. Summary of the invention

[0003] The technical problem to be solved by the present invention is how to provide an escalator drive spindle assembly with simple structure and light weight.

[0004] In order to solve the above technical problems, the present invention provides an escalator drive main shaft assembly, including a hollow main shaft, a bearing, an end cover, a main sprocket hub, a step sprocket hub and a handrail sprocket hub;

[0005] The hollow main shaft is a single main shaft; the inner rings at both ends of the hollow main shaft have step surfaces, and the outer ring of the bearing is installed in the step surfaces;

[0006] The middle part of the end cover has an outer cylindrical surface, the inner ring of the bearing is mounted on the outer cylindrical surface, and the bottom of the outer cylindrical surface is processed with a step surface to support the inner ring of the bearing;

[0007] The reinforcement ring is welded to the two ends of the hollow main shaft where the bearings are installed, so as to locally reinforce the hollow main shaft;

[0008] The rotary seal ring is installed on the opening side of the end cover and is rotatably sealed with the hollow main shaft;

[0009] The end cover is fixed on the escalator truss; the main sprocket hub, the step sprocket hub and the handrail sprocket hub are fixed on the hollow main shaft.

[0010] Preferably, the escalator drive main shaft assembly includes a rotary sealing ring; the rotary sealing ring is installed on the opening side of the end cover, and the inner ring of the rotary sealing ring contacts the outer ring of the hollow main shaft for rotary sealing of the hollow main shaft.

[0011] Preferably, the escalator drive main shaft assembly includes a rotating sealing ring and a reinforcement ring; the rotating sealing ring is installed on the opening side of the end cover, and the reinforcement ring is fixed to the outer rings at both ends of the hollow main shaft. The inner ring of the rotating sealing ring contacts the outer ring of the reinforcement ring for rotating sealing of the hollow main shaft.

[0012] Preferably, the bearing is a spherical roller bearing.

[0013] Preferably, the hollow main shaft is processed from a seamless steel pipe.

[0014] Compared with the prior art, the present invention has the following technical effects:

[0015] 1. Compared with the solid round steel spindle, the mass of the hollow spindle is greatly reduced;

[0016] 2. The hollow spindle can be simply processed from seamless steel pipe, which is simple in process and can greatly reduce costs;

[0017] 3. Compared with the traditional solid round steel spindle, the shaft end eliminates various step surfaces, stop washers, round nuts and other parts, and only requires one end cover, which greatly simplifies the shaft end structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0019] Figure 1 It is a three-dimensional schematic diagram of the structure of the escalator drive spindle assembly of Example 1;

[0020] Figure 2 It is a front view schematic diagram of the structure of the escalator drive spindle assembly of Example 1;

[0021] Figure 3 It is a side schematic diagram of the structure of the escalator drive spindle assembly of Example 1;

[0022] Figure 4 This is a partial cross-sectional view of the end portion of the escalator drive spindle assembly of Example 1. DETAILED DESCRIPTION

[0023] The following describes the implementation methods of the present invention through specific specific embodiments, and 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 methods, and the 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 the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. 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 specific embodiments to those skilled in the art.

[0024] Example 1

[0025] like Figures 1 to 4As shown, this embodiment provides an escalator drive main shaft assembly, including a hollow main shaft 1, a spherical roller bearing 2, an end cover 3, a reinforcement ring 4, a rotating sealing ring 5, a main sprocket hub 6, a step sprocket hub 7 and a handrail sprocket hub 8.

[0026] The hollow main shaft 1 is a single main shaft; the inner rings at both ends of the hollow main shaft 1 have step surfaces, and the outer rings of the spherical roller bearings 2 are installed in the step surfaces; the hollow main shaft 1 is processed from a seamless steel pipe.

[0027] The middle part of the end cover 3 has an outer cylindrical surface, and the inner ring of the spherical roller bearing 2 is installed on the outer cylindrical surface;

[0028] The end cover 3 is fixed to the escalator truss by bolts; when the escalator is running, the end cover 3 is fixed and the hollow main shaft 1 rotates.

[0029] The main sprocket hub 6, the step sprocket hub 7 and the handrail sprocket hub 8 are welded on the hollow main shaft 1 in the conventional manner.

[0030] The rotary sealing ring 5 is installed on the opening side of the end cover 3 , and the reinforcement ring 4 is fixed on the outer rings of both ends of the hollow main shaft 1 to locally reinforce the hollow main shaft 1 .

[0031] The inner ring of the rotary sealing ring 5 contacts the outer ring of the reinforcement ring 4 and is used for rotary sealing of the hollow main shaft 1 .

[0032] The reinforcement form of the stepped surfaces at both ends of the hollow main shaft 1 is not limited to the welding reinforcement ring 4, and includes other reinforcement forms, and the local reinforcement of the hollow main shaft may not be performed. For example, the inner ring of the rotating sealing ring 5 directly contacts the outer ring of the hollow main shaft 1.

[0033] The present invention has been described in detail above through specific implementation modes and embodiments, 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 also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. An escalator drive spindle assembly, characterized in that: It includes a hollow main shaft, bearings, end covers, a main sprocket hub, a step sprocket hub and a handrail sprocket hub; The hollow main shaft is a single main shaft; the inner rings at both ends of the hollow main shaft have step surfaces, and the outer ring of the bearing is installed in the step surfaces; The middle part of the end cover has an outer cylindrical surface, and the inner ring of the bearing is mounted on the outer cylindrical surface; The end cover is fixed on the escalator truss; the main sprocket hub, the step sprocket hub and the handrail sprocket hub are fixed on the hollow main shaft.

2. The escalator drive spindle assembly according to claim 1, characterized in that: The bottom of the outer cylindrical surface of the end cover has a step surface, and the step surface supports the inner ring of the bearing.

3. The escalator drive spindle assembly according to claim 1, characterized in that: The escalator driving main shaft assembly comprises a rotating sealing ring; the rotating sealing ring is installed on the opening side of the end cover, the inner ring of the rotating sealing ring contacts the outer ring of the hollow main shaft, and is used for rotating sealing of the hollow main shaft.

4. The escalator drive spindle assembly according to claim 1, characterized in that: The escalator drive main shaft assembly includes a rotating sealing ring and a reinforcing ring; the rotating sealing ring is installed on the opening side of the end cover, and the reinforcing ring is fixed on the outer rings at both ends of the hollow main shaft. The inner ring of the rotating sealing ring contacts the outer ring of the reinforcing ring for rotating sealing of the hollow main shaft.

5. The escalator drive spindle assembly according to claim 1, characterized in that: The bearing is a spherical roller bearing.

6. The escalator drive spindle assembly according to claim 1, characterized in that: The hollow main shaft is processed from a seamless steel pipe.

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