An elevator rope pulley anti-derailment combination structure

Abstract

This utility model discloses an elevator rope sheave anti-derailment assembly structure, including a rope sheave frame composed of two parallel load-bearing beams and their connecting parts. The key feature is that an axle is provided between the two load-bearing beams, and a rope sheave is mounted on the axle. The axle is fixed to the load-bearing beams by U-bolts. The cylindrical surfaces at both ends of the axle have tangential surfaces, and the axle is in close contact with the bottom surface of the load-bearing beams through these tangential surfaces. Limiting plates are provided on the end faces of both ends of the axle, and the width of the limiting plates cooperates with the rope sheave frame. The dual function of the tangential surfaces and the limiting plates completely eliminates the risk of axial and rotational displacement, improving anti-derailment reliability. The design simplifies the assembly process by using washers to compensate for the dimensional tolerances of the axle mounting position, and the U-bolts' cooperation with the countersunk groove, making installation convenient. The structure is simple, easy to manufacture, and has low overall cost.

Description

Technical Field

[0001] This utility model relates to the field of elevator safety technology, specifically to an elevator sheave anti-detachment assembly structure, which is used to prevent axial displacement or rotational dislocation of the elevator sheave during operation, thereby improving the safety and reliability of the elevator system. Background Technology

[0002] In elevator systems, the sheave is a crucial component of the traction drive, and its stability directly impacts the elevator's operational safety. Traditional sheave fixing methods often involve direct bolt locking or welding, which presents several problems: Axial displacement risk: Under long-term vibration or load changes, the sheave axle may experience axial movement, leading to sheave misalignment; Rotational loosening: The lack of an anti-rotation structure between the sheave axle and the load-bearing beam makes it prone to slippage due to insufficient friction. In mild cases, these problems can cause uneven loads on the wire rope, resulting in high elevator noise and severe wear on one side of the guide rails. In severe cases, the wire rope may detach from the rope groove, causing deformation of the sheave frame and separation of the wire rope from the sheave, potentially leading to the car or counterweight falling, causing property damage or even endangering passenger lives. Furthermore, installation and adjustment are difficult. Existing structures have strict dimensional tolerance requirements for the sheave axle and sheave frame, and unreliable positioning results in low assembly and adjustment efficiency.

[0003] Therefore, a rope and pulley combination structure with anti-derailment, anti-rotation, and quick installation characteristics is needed. Summary of the Invention

[0004] The purpose of this utility model is to solve the above problems and provide an elevator rope pulley anti-detachment combination structure, which has the characteristics of preventing axial displacement, rotational loosening, and convenient installation.

[0005] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: an elevator rope sheave anti-derailment assembly structure, comprising a rope sheave frame composed of two parallel load-bearing beams and their connecting parts, characterized in that a wheel axle is provided between the two load-bearing beams, a rope sheave is mounted on the wheel axle, and the wheel axle is fixed to the load-bearing beam by U-bolts; the cylindrical surfaces of the two ends of the wheel axle are respectively provided with chordal surfaces, the wheel axle is in close contact with the bottom surface of the load-bearing beam through the chordal surfaces, and limiting plates are respectively provided on the end faces of the two ends of the wheel axle, the width of the limiting plates cooperating with the rope sheave frame.

[0006] In the aforementioned elevator rope pulley anti-derailment assembly structure, preferably, the load-bearing beam of the rope pulley frame is provided with mounting holes, U-bolts pass through the mounting holes and are tightened, and anti-derailment pins are provided at the ends of the U-bolts.

[0007] In the aforementioned elevator rope pulley anti-derailment assembly structure, preferably, the limiting plate is a circular plate with a diameter larger than that of the wheel axle, and the limiting plate is fixed to the end face of the wheel axle by bolts.

[0008] In the aforementioned elevator rope sheave anti-derailment assembly structure, preferably, the length of the sheave shaft is less than the maximum width of the rope sheave frame, and a washer is provided between the limiting plate and the end face of the sheave shaft. The washer is used to compensate for the difference between the maximum width of the rope sheave frame and the length of the sheave shaft.

[0009] In the aforementioned elevator rope pulley anti-derailment assembly structure, as a preferred embodiment, the chordal surfaces on the cylindrical surfaces of the two ends of the pulley axle are coplanar, and the length of the chordal surface is greater than the width of the load-bearing beam constituting the rope pulley frame.

[0010] In the aforementioned elevator rope pulley anti-derailment assembly structure, as a preferred embodiment, a groove is provided at the joint between the pulley axle and the U-bolt. The diameter of the groove is equal to the diameter of the U-bolt, and the depth of the groove is less than one-quarter of the diameter of the U-bolt.

[0011] This technical solution consists of two parallel load-bearing beams and their connecting parts forming a rope sheave frame. The wheel axle assembly with the rope sheave is located between the two load-bearing beams and is fixed by U-bolts. Coplanar chordal surfaces are provided on the cylindrical parts of the axle ends, which are installed close to the bottom surface of the load-bearing beams to prevent radial rotation. At the same time, limiting plates are set on the two end faces of the wheel axle, and their width is tightly fitted with the rope sheave frame to further limit axial displacement.

[0012] This solution optimizes the details of each component: the U-bolt passing through the mounting hole of the load-bearing beam is reinforced with an anti-loosening pin in addition to the conventional lock nut; the circular limiting plate mates with the shaft, with a diameter larger than the wheel axle, allowing for installation without directional restrictions; the wheel axle length is less than the width of the rope pulley frame, and the size difference is compensated by washers to prevent the wheel axle from being too long and affecting the installation and function of the limiting plate; a groove is set at the mating point between the wheel axle and the U-bolt, with a depth less than 1 / 4 of the bolt diameter, which not only facilitates the rapid positioning of the U-bolt but also prevents axial slippage between the U-bolt and the wheel axle.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the dual function of the tangential surface and the limiting plate completely eliminates the risk of axial and rotational displacement and improves the reliability of anti-adhesion; the design of the washer compensating for the dimensional tolerance of the wheel axle mounting position, and the U-bolt and countersunk groove matching simplify the assembly process and make installation convenient; the structure is simple, easy to process and manufacture, and the overall cost is low. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 yes Figure 1 The right view.

[0016] Figure 3 yes Figure 1 Top view.

[0017] Figure 4 yes Figure 1A magnified schematic diagram of the structure at point M in the middle.

[0018] Figure 5 This is a schematic diagram of a partial structure of the end of a wheel axle according to this utility model.

[0019] In the diagram: 1-rope pulley frame, 2-rope pulley, 3-U-bolt, 4-limiting plate, 5-wheel axle, 501-tangential surface, 502-sinking groove, 6-anti-detachment pin. Detailed Implementation

[0020] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0021] This embodiment describes an elevator rope pulley anti-derailment combination structure, such as... Figures 1 to 3 As shown, the sheave frame 1 serves as the installation base. The sheave frame 1 is arranged according to the actual working conditions of the elevator. The sheave frame 1 consists of two parallel load-bearing beams and their connecting parts. The load-bearing beams are made of channel steel or angle steel arranged back to back. The sheave 2 is accommodated between the two load-bearing beams. The sheave 2 is fixed to the wheel axle 5 by bearings. The connecting parts between the load-bearing beams are made of short angle steel or sheet metal bending parts, which can be bolted or welded.

[0022] The axle 5 between the two load-bearing beams is fixed to the load-bearing beam by U-bolts 3. The load-bearing beam is provided with mounting holes. The U-bolts 3 pass through the mounting holes and are tightened with spring washers and nuts. The end of the U-bolt is also provided with an anti-detachment pin 6, which is made of cotter pin, etc.

[0023] Furthermore, each end of the axle 5 has a tangential surface 501 on its cylindrical surface. These tangential surfaces 501 are coplanar, meaning they lie in the same plane. The length of each tangential surface 501 is slightly greater than the width of the load-bearing beam constituting the sheave frame 1, maximizing the contact area between the tangential surface 501 and the load-bearing beam. The axle 5 is mounted tightly against the bottom surface of the load-bearing beam via the tangential surface 501. Limiting plates 4 are also provided on the end faces of both ends of the axle 5, with the plates of the limiting plates 4 fitting snugly against the sheave frame 1.

[0024] Furthermore, the limiting plate 4 is a circular plate, and the diameter of the limiting plate 4 is larger than the diameter of the wheel axle 5, such as... Figure 4 As shown, the limit plate 4 must block the edge of the load-bearing beam of the rope wheel frame 1. The limit plate 4 is fixed to the end face of the wheel axle 5 by bolts located at its center. The center holes at both ends of the wheel axle 5 can be machined into screw holes for installation.

[0025] The length of the axle 5 is less than the maximum width of the sheave frame 1, generally leaving 2-5mm. A washer is provided between the limiting plate 4 and the end face of the axle 5. The washer is used to compensate for the difference between the maximum width of the sheave frame 1 and the length of the axle 5. That is, in actual installation, the 2-5mm gap is eliminated by adding a washer between the end face of the axle 5 and the limiting plate 4, so as to ensure that the limiting plate 4 and the load-bearing beam of the sheave frame 1 are tightly and stably matched.

[0026] Furthermore, a groove 502 is provided at the mating point between the axle 5 and the U-bolt 3, such as... Figure 5 As shown, the diameter of the groove 502 is equal to the diameter of the U-bolt 3. Note: The U-bolt 3 is made of a single round steel bar. The depth of the groove 502 is less than one-quarter of the diameter of the U-bolt 3, which ensures complete positioning and avoids occupying too much shaft diameter.

[0027] Working principle and application:

[0028] The axle 5 equipped with the pulley 2 must be stable. The tangential surfaces 501 at both ends of the axle 5 are in close contact with the bottom surface of the load-bearing beam of the pulley frame 1, and are secured by U-bolts 3 to completely restrict the rotation of the axle 5. Since the pulley frame 1 is integrated with the elevator body, the limiting plates 4 at both ends of the axle 5 completely eliminate the axial degree of freedom of the axle 5. In addition, the U-bolts 3 and the grooves 502 on the axle 5 further consolidate the stability of the axle 5.

[0029] In practical applications, the axle 5 equipped with the pulley 2 is used as a component. Axles 5 of the same specifications use the same size limiting plate 4 and fasteners, which are easy to position and install, whether on-site or in-factory assembly.

[0030] This solution is applicable to all types of elevator traction systems, especially for rope sheave fixing scenarios in high-speed elevators or heavy-duty elevators, and has broad market application prospects.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any equivalent changes or modifications made in accordance with the technical concept proposed by the present invention without departing from the principles of the present invention shall still fall within the scope of protection of the present invention.

Claims

1. An elevator rope pulley anti-off combined structure comprising a pulley frame (1) composed of two parallel arranged load bearing beams and their connecting pieces, characterized in that A wheel axle (5) is provided between the two load-bearing beams. A rope wheel (2) is mounted on the wheel axle. The wheel axle is fixed to the load-bearing beam by U-bolts (3). A chord section (501) is provided on the cylindrical surface of the axle head at both ends. The wheel axle is in close contact with the bottom surface of the load-bearing beam through the chord section. A limiting plate (4) is provided on the end face of both ends of the wheel axle. The width of the limiting plate is matched with the rope wheel frame.

2. The elevator rope wheel anti-drop combination structure according to claim 1, characterized in that, The sheave frame (1) has mounting holes on its load-bearing beam. U-bolts (3) pass through the mounting holes and are tightened. Anti-detachment pins (6) are provided at the ends of the U-bolts.

3. The elevator rope wheel anti-drop combination structure according to claim 1, characterized in that, The limiting plate (4) is a circular plate with a diameter greater than that of the wheel axle (5). The limiting plate is fixed to the end face of the wheel axle by bolts.

4. The elevator rope pulley anti-derailment assembly structure according to claim 1, characterized in that, The length of the axle (5) is less than the maximum width of the rope wheel frame (1). A washer is provided between the limiting plate (4) and the end face of the axle. The washer is used to compensate for the difference between the maximum width of the rope wheel frame and the length of the axle.

5. The elevator rope pulley anti-derailment assembly structure according to claim 1, characterized in that, The chordal surfaces (501) on the cylindrical surfaces of the two ends of the wheel axle are coplanar, and the length of the chordal surface is greater than the width of the load-bearing beam that constitutes the rope wheel frame (1).

6. The elevator rope pulley anti-derailment assembly structure according to claim 1, characterized in that, The wheel axle (5) and the U-bolt (3) are provided with a groove (502), the diameter of the groove is equal to the diameter of the U-bolt, and the depth of the groove is less than one-quarter of the diameter of the U-bolt.

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