Three-dimensional section special-shaped pulley

Abstract

The utility model discloses a three -dimensional section special -shaped pulley, including pulley body and V -groove structure on it. The bottom surface and two side surfaces of V -groove structure are equipped with multiple three -dimensional sections respectively in equal distribution, and the section on the bottom surface and side surface is staggered arrangement. The core advantage of the utility model lies in, through this unique three -dimensional staggered section design, when the rope passes, produces chain -driven active sliding, changes traditional passive friction into efficient active mesh transmission, thereby has improved the sliding rate of pulley, the efficiency of saving effort and operating safety significantly, light weight, simultaneously solid structure, effectively solved traditional U -shaped pulley easy to slip, low efficiency and potential safety hazard etc.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-altitude safety operation equipment, specifically relating to a three-dimensional shaped pulley. Background Technology

[0002] Currently, pulleys widely used in personal fall protection equipment and force multiplier systems typically feature a U-shaped curved surface design for their rope grooves. This traditional structure relies primarily on the friction between the rope and the groove wall to passively drive the pulley's rotation, resulting in inherent drawbacks such as low sliding efficiency, susceptibility to slippage and freewheeling, and limited system effort-saving ratio. Furthermore, the U-shaped groove makes it difficult to visually determine whether the pulley is rotating normally during operation, posing a safety hazard. Additionally, the connection between the pulley and rope is prone to detachment or slippage under dynamic loads. Therefore, the industry urgently needs a new pulley design that can actively improve transmission efficiency, enhance operational safety, and possess a robust structure. Utility Model Content

[0003] The present invention aims to provide a three-dimensional shaped pulley with irregular cross-section, which solves the technical problems of low sliding efficiency, easy slippage and great safety hazards of traditional pulleys due to their reliance on passive friction transmission.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A three-dimensional shaped pulley includes a pulley body with a V-groove structure for contacting a rope. The V-groove structure includes a bottom surface and two side surfaces, and multiple three-dimensional cut surfaces are provided on the bottom surface and the two side surfaces. The three-dimensional cut surfaces are equally distributed on the bottom surface and the two side surfaces, forming a chain-driven sliding structure.

[0005] Furthermore, the three-dimensional cut surface is divided into 8 equal parts on the bottom surface and the two side surfaces respectively.

[0006] Furthermore, the pulley body is integrally formed from high-strength aluminum alloy or stainless steel.

[0007] Furthermore, the three-dimensional cross-section of the bottom surface is staggered with the three-dimensional cross-sections of the two sides.

[0008] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model transforms the sliding friction of the rope into a chain-driven active meshing transmission by staggering the inner bottom surface and the three-dimensional cross-section of the V-groove structure, greatly improving the sliding speed and the labor-saving effect of the force-multiplying system; This unique V-shaped structure and multi-faceted design effectively prevent rope slippage and make the rotation status of the pulley clear at a glance, facilitating real-time visual monitoring and anomaly investigation, thus achieving visualized safety; The pulley body is integrally formed from high-strength metal material, ensuring lightweight while possessing extremely high breaking strength, stable performance, and suitability for harsh rescue and high-altitude operation environments. Attached Figure Description

[0009] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an axonometric drawing of a three-dimensional cross-section irregular pulley according to the present invention; Figure 2 This is a front view of a three-dimensional cross-section irregular pulley according to the present invention. Detailed Implementation

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] The present invention will be further described in detail below with reference to the embodiments.

[0012] like Figure 1 and Figure 2 As shown, the three-dimensional cross-section irregular pulley of this utility model mainly includes a pulley body 1. The pulley body 1 has an axle hole 2 at its center, which is used to install it into personal fall protection equipment or a force multiplier system through bearings and axle pins.

[0013] The pulley body 1 has a V-groove structure 3 around its periphery for contacting the rope. Compared with the traditional U-groove, the V-groove structure 3 can form a more stable fit with the rope, effectively preventing rope slippage in harsh working environments.

[0014] The key innovation of this embodiment lies in the surface design of the V-groove structure 3. The V-groove structure 3 includes a bottom surface 301 and two side surfaces 302 and 303. Multiple three-dimensional cut surfaces 4 are precision-machined onto the bottom surface 301 and the two side surfaces 302 and 303. Specifically, the bottom surface 301 and the two side surfaces 302 and 303 of the V-groove structure 3 are each cut into eight equal parts. This means that the pulley's 360-degree circumference is evenly divided into eight parts, and within each equal section, an independent cut surface is machined on the bottom surface 301 and the side surfaces 302 and 303. These cut surfaces collectively constitute the complex three-dimensional working surface where the pulley contacts the rope.

[0015] More importantly, these three-dimensional cut surfaces 4 distributed in three directions are not simply aligned. The three-dimensional cut surfaces on the bottom surface 301 are staggered with the three-dimensional cut surfaces on the sides 302 and 303. This staggered structure causes the rope to continuously and alternately contact the edges of the cut surfaces in different directions on the bottom and sides when passing through the pulley.

[0016] When the rope is placed in the V-groove structure of the irregularly shaped pulley and pulled, the rope does not pass through smoothly with friction. Due to the staggered arrangement of the three-dimensional cut surfaces 4, the rope is constantly "captured" and "pushed" by these intersecting cut edges. This process produces a chain-like sliding effect: the linear motion of the rope is efficiently converted into a torque that drives the pulley to rotate through a series of tiny, alternating lever actions. This greatly reduces the relative slippage between the rope and the pulley, achieving near-synchronous active transmission, thereby increasing the sliding rate and exhibiting extremely high labor-saving efficiency in a force-multiplying system composed of multiple pulleys.

[0017] Furthermore, the multi-faceted design gives the pulley a unique appearance when rotating. If the pulley experiences abnormal slippage such as jamming or damage, its unique rotational posture or appearance will immediately show a visually identifiable difference, thus enabling visual safety monitoring and facilitating quick identification and replacement of faulty parts by operators.

[0018] It should be noted that, in this document, terms such as “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0019] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A three-dimensional profiled pulley, characterized by: The device includes a pulley body, the outer edge of which has a V-groove structure for contacting a rope. The V-groove structure includes a bottom surface and two side surfaces, and multiple three-dimensional cut surfaces are provided on the bottom surface and the two side surfaces respectively. The three-dimensional cut surfaces are equally distributed on the bottom surface and the two side surfaces, forming a chain-driven sliding structure.

2. A three-dimensional profiled pulley according to claim 1, characterized in that: The three-dimensional cut surface is divided into 8 equal parts on the bottom surface and the two side surfaces respectively.

3. A three-dimensional profiled pulley according to claim 2, characterized in that: The pulley body is made of high-strength aluminum alloy or stainless steel in one piece.

4. A three-dimensional profiled pulley according to claim 3, characterized in that: The three-dimensional cross-section of the bottom surface is staggered from the three-dimensional cross-sections of the two sides.

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