Electric motor for escalators

Abstract

The utility model provides an electric motor for escalator belongs to electric motor technical field, include: bedplate, end cover, it is connected with the bedplate, the end cover with the bedplate between form has motor cavity, motor main part, it is located in the motor cavity, brake wheel, it sets up in the end cover out, the motor main part with brake wheel is separated by the end cover. The utility model has the beneficial effect that: the brake wheel is physically isolated with the motor main part, avoids the dust, heat and friction pair produced in the braking process to expose in the motor cavity directly, reduces the pollution and heat influence to the motor internal winding and insulation system significantly, seals or protection design simultaneously to the braking area independently, lays the structural foundation for the promotion whole machine protection grade, makes it suitable for the humid dusty environment such as outdoor escalator.

Description

Technical Field

[0001] This utility model belongs to the field of electric motor technology and relates to an electric motor for escalators. Background Technology

[0002] In escalator systems, the electric motor, as the core drive component, typically needs to integrate a braking function to ensure rapid cessation of operation in the event of a power outage or emergency, thus protecting passenger safety. Traditional electric motors often integrate the brake within the motor itself. While this design simplifies the overall structure, it has several shortcomings in practical applications.

[0003] First, the built-in brake generates a significant amount of heat, dust, and wear products from the friction pair during operation. These substances can easily enter the motor cavity, causing contamination and thermal damage to the motor windings and insulation system, reducing the motor's reliability and lifespan. Especially under frequent start-stop conditions, the heat accumulation from the brake can lead to an increase in the motor's internal temperature, further affecting its performance.

[0004] Secondly, in order to ensure braking effect, built-in brakes usually require a certain ventilation and heat dissipation design. This inevitably involves setting vents or labyrinth structures on the motor housing, thereby reducing the overall protection level of the machine (such as IP54 or lower). For escalator systems in outdoor environments, due to long-term exposure to harsh conditions such as rain and dust, a lower protection level can easily lead to moisture and foreign objects entering the motor, causing problems such as electrical short circuits and corrosion of mechanical parts, seriously affecting the normal operation of the equipment and increasing maintenance costs.

[0005] Furthermore, the built-in brake design complicates the disassembly and maintenance of the motor. In particular, when it is necessary to replace the brake pads or adjust the clearance, the motor housing must be opened, which increases the difficulty and time cost of maintenance. Moreover, since the brake is tightly integrated with the motor body, it is difficult to seal the braking area separately, which cannot effectively improve the local protection capability and has considerable room for improvement. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a motor for escalators.

[0007] The objective of this utility model can be achieved through the following technical solution: an electric motor for escalators, comprising:

[0008] Base;

[0009] An end cap is connected to the base, and a motor cavity is formed between the end cap and the base;

[0010] The main body of the motor is located inside the motor cavity;

[0011] A brake wheel is disposed outside the end cover, and the motor body and the brake wheel are separated by the end cover.

[0012] In the aforementioned motor for an escalator, the end of the end cap away from the base is recessed inward to form a receiving groove, and the brake wheel is located in the receiving groove.

[0013] In the aforementioned escalator motor, a rotational clearance is formed between the brake wheel and the side wall of the receiving groove.

[0014] In the aforementioned motor for an escalator, the motor body is provided with a motor shaft, the end cover is provided with a through hole, the motor shaft passes through the through hole, and the brake wheel is connected to the motor shaft.

[0015] The aforementioned escalator motor also includes a coupling connected to the motor shaft, and the brake wheel is located between the end cover and the coupling.

[0016] In one of the aforementioned escalator motors, the coupling is located in the receiving groove, and at least a portion of the coupling is exposed in the receiving groove.

[0017] In the aforementioned escalator motor, the coupling is connected to the end cover.

[0018] The aforementioned motor for an escalator also includes a bearing located in the through hole, and the motor shaft is rotatably connected to the base via the bearing.

[0019] The aforementioned escalator motor also includes a brake arm and a brake spring, wherein the brake spring drives the brake arm to approach the brake wheel.

[0020] The aforementioned motor for an escalator also includes an electromagnet, which drives the brake arm away from the brake wheel.

[0021] Compared with the prior art, the beneficial effects of this utility model are as follows: Physically isolating the brake wheel from the motor body prevents dust, heat, and friction pairs generated during braking from being directly exposed to the motor cavity, significantly reducing pollution and thermal impact on the motor's internal windings and insulation system; it also facilitates independent sealing or protection design of the braking area, laying a structural foundation for improving the overall protection level of the machine, making it suitable for humid and dusty environments such as outdoor escalators; the receiving groove provides semi-enclosed protection for the brake wheel, reducing the risk of external rainwater and dust directly impacting the braking surface; it also allows the braking assembly to be fully embedded, reducing the outer contour of the equipment, improving structural compactness, and providing installation space for subsequent installation of sealing rings or protective covers; the fixed connection between the coupling and the end cover (such as bolts or stop fit) enhances the overall rigidity of the transmission system, preventing axial movement of the coupling due to load fluctuations, and improving operational stability and connection reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the electric motor for escalators according to this utility model.

[0023] Figure 2 for Figure 1 Enlarged view of part A.

[0024] In the diagram, 100 is the base; 110 is the motor cavity; 200 is the end cover; 210 is the receiving groove; 220 is the through hole; 300 is the motor body; 310 is the motor shaft; 400 is the brake wheel; 500 is the coupling; 600 is the bearing; 700 is the brake arm; and 800 is the electromagnet. Detailed Implementation

[0025] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0026] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0027] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0031] like Figure 1 , Figure 2 As shown, an escalator motor includes:

[0032] Base 100;

[0033] An end cap 200 is connected to the base 100, and a motor cavity 110 is formed between the end cap 200 and the base 100;

[0034] The motor body 300 is located inside the motor cavity 110;

[0035] A brake wheel 400 is disposed outside the end cover 200, and the motor body 300 and the brake wheel 400 are separated by the end cover 200.

[0036] In this embodiment, the brake wheel 400 is physically isolated from the motor body 300, preventing dust, heat and friction pairs generated during braking from being directly exposed inside the motor cavity 110, significantly reducing pollution and thermal impact on the internal windings and insulation system of the motor; at the same time, it facilitates independent sealing or protection design of the braking area, laying a structural foundation for improving the overall protection level of the machine (such as reaching IP65), making it suitable for humid and dusty environments such as outdoor escalators.

[0037] like Figure 1 , Figure 2As shown, based on the above embodiment, the end cap 200 is recessed inward at the end away from the base to form a receiving groove 210, and the brake wheel 400 is located in the receiving groove 210.

[0038] In this embodiment, the receiving groove 210 provides semi-enclosed protection for the brake wheel 400, reducing the risk of external rainwater and dust directly impacting the brake surface; at the same time, it allows the brake assembly to be embedded as a whole, reducing the outer contour of the equipment, improving the structural compactness, and providing installation space for the subsequent addition of sealing rings or protective covers.

[0039] like Figure 1 , Figure 2 As shown, based on the above embodiment, a rotational gap is formed between the brake wheel 400 and the side wall of the receiving groove 210.

[0040] In this embodiment, a reasonable rotation gap is reserved to ensure that the brake wheel 400 will not interfere or rub against the receiving groove 210 when rotating at high speed or thermally expanding, thus avoiding abnormal wear or jamming; at the same time, this gap can serve as part of the labyrinth channel, and together with the sealing structure, effectively prevent external contaminants from entering the motor cavity 110.

[0041] like Figure 1 , Figure 2 As shown, based on the above embodiment, the motor body 300 is provided with a motor shaft 310, the end cover 200 is provided with a through hole 220, the motor shaft 310 passes through the through hole 220, and the brake wheel 400 is connected to the motor shaft 310.

[0042] In this embodiment, power and braking force are transmitted simultaneously through a single motor shaft 310, resulting in a simple and reliable structure. The through hole 220 on the end cover 200 serves as a shaft support reference, facilitating precise alignment, reducing vibration, and improving operational stability.

[0043] like Figure 1 , Figure 2 As shown, based on the above embodiment, a coupling 500 is also included, which is connected to the motor shaft 310, and the brake wheel 400 is located between the end cover 200 and the coupling 500.

[0044] In this embodiment, the brake wheel 400 is arranged in a compact space between the end cover 200 and the coupling 500, making full use of the axial layout and avoiding additional extension of the motor length; at the same time, the coupling 500 serves as an external transmission interface and is arranged adjacent to the brake wheel 400, shortening the braking response path and improving braking efficiency and safety.

[0045] like Figure 1 , Figure 2As shown, based on the above embodiment, the coupling 500 is located in the receiving groove 210, and at least a portion of the coupling 500 is exposed in the receiving groove 210.

[0046] In this embodiment, the main body of the coupling 500 is embedded in the receiving groove 210 and protected by the end cover 200, reducing the corrosion of its connection parts by the external environment; the exposed part is convenient to connect with the input shaft of the reducer, taking into account both protection and assembly convenience.

[0047] like Figure 1 , Figure 2 As shown, based on the above embodiment, the coupling 500 is connected to the end cover 200.

[0048] In this embodiment, the overall rigidity of the transmission system is enhanced by the fixed connection (such as bolts or stop fit) between the coupling 500 and the end cover 200, preventing axial movement of the coupling 500 due to load fluctuations, and improving operational stability and connection reliability.

[0049] like Figure 1 , Figure 2 As shown, based on the above embodiment, a bearing 600 is also included. The bearing 600 is located in the through hole 220, and the motor shaft 310 is rotatably connected to the base through the bearing 600.

[0050] In this embodiment, the bearing 600 is directly installed in the through hole 220 of the end cover 200, forming a stable double-support structure that effectively bears radial and axial loads; at the same time, the bearing 600 is placed inside the end cover 200, away from dust pollution in the braking area, extending the life of the bearing 600 and ensuring long-term stable operation.

[0051] like Figure 1 , Figure 2 As shown, based on the above embodiment, it also includes a brake arm 700 and a brake spring, wherein the brake spring drives the brake arm 700 to approach the brake wheel 400.

[0052] In this embodiment, spring force is used to achieve automatic braking in the event of power failure, which complies with the "fail-safe" principle; the brake arm 700 reliably presses the brake wheel 400 under the action of the spring, ensuring that the escalator stops quickly in the event of a sudden power failure or malfunction, thus protecting the personal safety of passengers.

[0053] like Figure 1 , Figure 2 As shown, based on the above embodiment, an electromagnet 800 is also included, which drives the brake arm 700 away from the brake wheel 400.

[0054] In this embodiment, when energized, the electromagnet 800 attracts the brake arm 700, overcoming the spring force to release the brake wheel 400, thus enabling the motor to start normally. This electromechanical linkage structure has a fast response and precise control, and is interlocked with the motor's main circuit to ensure "brake release before starting the motor," preventing wear or overheating caused by operating with the brake engaged.

[0055] like Figure 1 , Figure 2 As shown, this utility model provides a high-reliability motor specifically designed for escalators. By placing the brake wheel 400 outside the end cover 200, and completely enclosing the motor body 300 by the motor cavity 110 formed by the end cover 200 and the base 100, the core components of the motor are physically isolated from the braking system. This design fundamentally avoids the pollution and thermal damage to the motor windings and insulation system caused by dust, heat, and friction pairs generated during braking. It creates structural conditions for the whole machine to achieve a high protection level of IP65 or above, and significantly improves the adaptability and long-term operational reliability in outdoor humid and dusty environments.

[0056] Furthermore, the receiving groove 210 provided on the outer side of the end cover 200 integrates the brake wheel 400 and the coupling 500 into a semi-enclosed space, which effectively shields against external rainwater and foreign object intrusion, optimizes the axial layout, and makes the overall structure more compact. The rotation gap reserved between the brake wheel 400 and the receiving groove 210 takes into account the dynamic requirements of thermal expansion and high-speed rotation, and can also serve as part of the labyrinth sealing channel to enhance dust and water resistance. The motor shaft 310 passes through the through hole 220 on the end cover 200 and is stably supported by the built-in bearing 600 to ensure smooth transmission. At the same time, the bearing 600 is positioned away from the braking area to extend its service life.

[0057] In terms of the braking system, a classic power-off braking architecture of brake spring + brake arm 700 + electromagnet 800 is adopted: when power is off, the spring force automatically presses the brake wheel 400 to achieve the inherent safety of "braking upon failure"; when power is on, the electromagnet 800 is quickly released to ensure "brake release before start-up" and prevent operation with the brake on; while the coupling 500 is embedded in the receiving groove 210 and fixedly connected to the end cover 200, which not only protects the transmission interface from environmental corrosion, but also enhances the rigidity of the system and improves the stability of load response.

Claims

1. An electric motor for escalators, characterized in that, include: Base; An end cap is connected to the base, and a motor cavity is formed between the end cap and the base; The main body of the motor is located inside the motor cavity; A brake wheel is disposed outside the end cover, and the motor body and the brake wheel are separated by the end cover.

2. The electric motor for an escalator according to claim 1, characterized in that: The end cap away from the base is recessed inward to form a receiving groove, and the brake wheel is located in the receiving groove.

3. The electric motor for an escalator according to claim 2, characterized in that: A rotational clearance is formed between the brake wheel and the side wall of the receiving groove.

4. The electric motor for an escalator according to claim 2, characterized in that: The motor body is provided with a motor shaft, the end cover is provided with a through hole, the motor shaft passes through the through hole, and the brake wheel is connected to the motor shaft.

5. The electric motor for an escalator according to claim 4, characterized in that: It also includes a coupling connected to the motor shaft, and the brake wheel is located between the end cover and the coupling.

6. The electric motor for an escalator according to claim 5, characterized in that: The coupling is located in the receiving groove, and at least a portion of the coupling is exposed in the receiving groove.

7. The electric motor for an escalator according to claim 5, characterized in that: The coupling is connected to the end cover.

8. The electric motor for an escalator according to claim 4, characterized in that: It also includes a bearing located in the through hole, through which the motor shaft is rotatably connected to the base.

9. The electric motor for an escalator according to claim 1, characterized in that: It also includes a brake arm and a brake spring, the brake spring driving the brake arm to approach the brake wheel.

10. The electric motor for an escalator according to claim 9, characterized in that: It also includes an electromagnet that drives the brake arm away from the brake wheel.

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