High-strength cast iron wheel for passenger elevator

Abstract

A high-strength cast iron wheel for a passenger elevator relates to the field of elevator rope sheaves and comprises a rim and a hub portion, a plurality of reinforcing ribs are distributed and fixedly mounted between the rim and the hub portion at equal intervals, a supporting portion is arranged between every two adjacent reinforcing ribs, and the middle area of each supporting portion is arranged in a thickened protruding mode. According to the cast iron wheel, the reinforcing rib in the middle of the cast iron wheel and the supporting part are subjected to weight reduction design while the supporting strength is guaranteed, and the light cast iron wheel means small rotational inertia, so that the speed of an elevator is easier to control when the cast iron wheel is started and stopped; compared with the prior art, impact force caused by sudden acceleration or deceleration is reduced, riding comfort and safety are improved, air resistance can be reduced to a certain extent due to the fact that the design of the concave arcs of the reinforcing ribs and the arc faces of the supporting parts jointly act, the wheels can rotate more smoothly, noise and vibration are reduced, and riding experience is improved.

Description

Technical Field

[0001] This utility model relates to the field of elevator rope pulleys, and in particular to a high-strength cast iron pulley for passenger elevators. Background Technology

[0002] Cast iron wheels on passenger elevators are a crucial component of the elevator system. They play a key role in ensuring the safe and stable operation of the elevator, typically serving as guide wheels, anti-cord sheaves, and traction sheaves. However, during our research, we found that existing cast iron wheels for passenger elevators are made with relatively large weights to increase their strength, resulting in large moments of inertia, poor stability of the elevator operation, and consequently reduced passenger comfort. Utility Model Content

[0003] The purpose of this invention is to provide a high-strength cast iron wheel for passenger elevators to solve the problems mentioned in the background art.

[0004] The technical problem solved by this utility model is achieved through the following technical solution:

[0005] A high-strength cast iron wheel for passenger elevators includes a rim and a hub. Several reinforcing ribs are fixedly installed at equal intervals between the rim and the hub. A support is provided between two adjacent reinforcing ribs. The support is fixedly connected to the rim and the hub and the reinforcing ribs. The middle area of ​​the support is thickened and protruded.

[0006] Preferably, the two ends of the reinforcing rib are respectively arranged in an inwardly concave arc shape.

[0007] Preferably, the inner wall of the inner hole in the middle of the hub is provided with grooves at the openings at both ends.

[0008] Preferably, the outer surface of the wheel rim is provided with wheel grooves.

[0009] Preferably, the reinforcing rib has an airflow hole running through its middle.

[0010] The advantages and positive effects of this utility model are:

[0011] This invention reduces weight by incorporating a reinforcing rib and support in the middle of the cast iron wheel, ensuring structural strength. A lighter cast iron wheel means a smaller moment of inertia, making it easier to control the elevator speed during startup and shutdown, reducing the impact of sudden acceleration or deceleration, and improving ride comfort and safety. The concave arc design of the reinforcing rib effectively disperses stress, preventing stress concentration at a specific point, thus reducing the possibility of cracks and enhancing the overall strength and durability of the cast iron wheel. It can better resist bending moments, making the reinforcing rib less prone to deformation under heavy loads, improving the rigidity of the cast iron wheel. At the same time, the combined effect with the arc surface of the support can reduce air resistance to a certain extent, making the wheel rotate more smoothly, reducing noise and vibration, and improving the riding experience. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a schematic diagram of the overall structure of a high-strength cast iron wheel for passenger elevators according to this utility model;

[0014] Figure 2 This is a schematic diagram of the main structure of a high-strength cast iron wheel for passenger elevators according to this utility model;

[0015] Figure 3 This is a schematic diagram of the left-side structure of a high-strength cast iron wheel for passenger elevators according to this utility model;

[0016] Figure 4 This is a top view schematic diagram of a high-strength cast iron wheel for passenger elevators according to this utility model;

[0017] Figure 5 This is a schematic diagram of the reinforcing ribs in a high-strength cast iron wheel for passenger elevators according to this utility model;

[0018] Figure 6 This is a partial structural diagram of the support part in a high-strength cast iron wheel for passenger elevators according to this utility model.

[0019] The markings in the attached diagram are described as follows: rim 10; air vent 11; support 12; hub 13; reinforcing rib 14; inner hole 15; filler nozzle 16; groove 17; wheel groove 18. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention. These drawings are simplified schematic diagrams, which are only used to illustrate the basic structure of the present invention in an illustrative manner. Therefore, they only show the components related to the present invention.

[0021] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0022] The following is combined with Figure 1-6 This utility model will be described in detail below. For ease of description, the directions mentioned below are defined as follows: the directions of up, down, left, right, front, and back mentioned below are the same as... Figure 1 The directions of front, back, left, right, up, and down in the view are consistent. Figure 1 The directions shown are consistent with the front-facing, back-facing, left-right, up-down directions of the device.

[0023] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of at least two elements or the interaction relationship of at least two elements, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0024] The embodiments of this utility model will be further described in detail below with reference to the accompanying drawings:

[0025] While the use of cast iron wheels in passenger elevators and freight elevators is similar in basic principle, there are significant differences in design requirements. The cast iron wheels used in passenger elevators are designed to be smaller, allowing for more compact installation on the top of the car or the counterweight frame. In contrast, freight elevators, in order to bear a greater load, typically have larger cast iron wheels, requiring stronger structural support and a deeper wheel groove to ensure the safety and stability of the wire rope. At the same time, since the main carrier of passenger elevators is people, the requirements for passenger elevators are to have smooth acceleration during start-up and stopping to ensure passenger comfort, and to consider reducing vibration and noise to provide a smooth riding experience.

[0026] Please see Figure 1-6 This utility model provides an embodiment of a high-strength cast iron wheel for passenger elevators, comprising an outer rim 10 and a central hub 13. Six reinforcing ribs 14 are fixedly installed at equal intervals between the rim 10 and the hub 13 for connection. An inner hole 15 is provided in the middle of the hub 13 for mounting bearings or directly fitting onto a shaft. Wheel grooves 18 are distributed on the surface of the outer rim 10 for guiding and supporting steel wire ropes. A support portion 12 is provided between two adjacent reinforcing ribs 14. The support portion 12 is fixedly connected to the rim 10, and the hub 13 is fixedly connected to the reinforcing ribs 14. The middle area of ​​the support portion 12 is thickened and protruded, making the middle area of ​​the support portion 12 thicker than the sides, which can effectively improve the support strength of the cast iron wheel.

[0027] It is worth mentioning that, in this embodiment, the reinforcing rib 14 is provided with concave arcs at both ends, which effectively reduces the weight of the cast iron wheel. At the same time, the concave arc design allows the reinforcing rib 14 to effectively disperse stress, avoid stress concentration at a specific point, thereby reducing the possibility of crack formation, enhancing the overall strength and durability of the cast iron wheel, and better resisting bending moments. This makes the reinforcing rib less prone to deformation when subjected to large loads, thus improving the rigidity of the cast iron wheel.

[0028] It should be noted that, in order to further reduce the weight of the cast iron wheel, in this embodiment, an airflow hole 11 is provided through the middle of the reinforcing rib 14. The airflow hole 11 further reduces the weight. At the same time, since the middle area of ​​the support part 12 is thicker than the two sides, the two sides of the support part 12 and the middle area will form an arc transition. Together with the reinforcing rib 14, it can reduce air resistance to a certain extent, making the wheel rotate more smoothly, reducing noise and vibration, and improving the riding experience.

[0029] It is also worth mentioning that, in this embodiment, the inner wall of the inner hole 15 in the middle of the hub portion 13 is provided with sliding grooves 17 at the two opening positions, which can make the bearing or connecting shaft more stable and secure when installed in the inner hole 15. At the same time, lubricating oil is added by using the oil filler 16 installed on the outside of the hub portion 13, making the cast iron wheel run more smoothly.

[0030] In specific implementation, ductile iron is selected for the cast iron wheel. When used as a guide wheel and traction wheel, the wheel groove 18 is set as V-shaped; when used as a counter-rope wheel, the wheel groove 18 is set as U-shaped. The guide wheel is installed on the top of the car and the counterweight frame, while the counter-rope wheel is installed on the top of the counterweight frame. The traction wheel is installed in the machine room. The bearings are installed into the inner holes 15 respectively, and lubricating oil is added through the grease nipple 16 to ensure good lubrication. The wire rope passes through the corresponding wheel groove 18, ensuring that the wire rope is correctly positioned in each wheel groove 18 and will not come out. During the operation of the cast iron wheel, the middle reinforcing rib 14 and the support part 12 can effectively and completely support the stress brought by the rope groove surface, while utilizing the concave arc... The design allows the reinforcing rib 14 to effectively disperse stress, preventing stress concentration at a specific point, thereby reducing the possibility of crack formation, enhancing the overall strength and durability of the cast iron wheel, and better resisting bending moments. This makes the reinforcing rib less prone to deformation under heavy loads, improving the rigidity of the cast iron wheel. The air vents 11 further reduce weight. Meanwhile, because the middle area of ​​the support 12 is thicker than the sides, the sides and middle area of ​​the support 12 form an arc transition. Together with the reinforcing rib 14, this reduces air resistance to a certain extent, making the wheel rotate more smoothly, reducing noise and vibration, and improving the riding experience.

[0031] It should be emphasized that the embodiments described in this utility model are illustrative rather than limiting. Therefore, this utility model is not limited to the embodiments described in the specific implementation. Any other implementation methods derived by those skilled in the art based on the technical solutions of this utility model are also within the scope of protection of this utility model.

Claims

1. A high-strength cast iron wheel for passenger elevators, characterized in that: The wheel includes a rim (10) and a hub (13). A number of reinforcing ribs (14) are fixedly installed at equal intervals between the rim (10) and the hub (13). A support (12) is provided between two adjacent reinforcing ribs (14). The support (12) is fixedly connected to the rim (10), the hub (13) and the reinforcing ribs (14). The middle area of ​​the support (12) is thickened and protruded.

2. The high-strength cast iron wheel for passenger elevators according to claim 1, characterized in that: The reinforcing rib (14) has concave arc-shaped ends.

3. A high-strength cast iron wheel for passenger elevators according to claim 2, characterized in that: The inner wall of the inner hole (15) in the middle of the hub (13) is provided with grooves (17) at the opening positions at both ends.

4. A high-strength cast iron wheel for passenger elevators according to claim 3, characterized in that: The outer surface of the wheel rim (10) is provided with wheel grooves (18).

5. A high-strength cast iron wheel for passenger elevators according to claim 4, characterized in that: The reinforcing rib (14) has an airflow hole (11) running through its middle.

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