A wear-resistant rope pulley

Abstract

This utility model relates to a wear-resistant rope pulley, comprising: a pulley disc and a rope groove arranged around the outer circumference of the pulley disc. The cross-section of the rope groove has a continuous S-shaped streamlined structure, and multiple protrusions are alternately arranged on the two sides of the rope groove along the circumferential direction. The width of the protrusions near the axis of the pulley disc is smaller than the width of the end away from the axis of the pulley disc, and the protrusions have a curved surface structure that is wider at the top and narrower at the bottom. By using a rope groove with a continuous S-shaped corrugated surface to replace the straight or horizontal grooves in the prior art, the sharp corners and stress concentration points at the contact between the rope and the groove are completely eliminated.

Description

Technical Field

[0001] This utility model relates to the field of rope wheel technology, specifically to a wear-resistant rope wheel. Background Technology

[0002] Rope pulleys, especially those used in high-altitude operations, climbing, and rescue, are core components of outdoor safety equipment. Their working principle involves using the friction and engagement force between the grooves on the pulley and the rope to brake or control the descent speed. Therefore, the design of the rope pulley directly affects the safety performance of the entire equipment and the lifespan of the rope.

[0003] Currently, a common design involves placing protrusions on both sides of the rope pulley groove to enhance the grip on the rope and reduce rope wear. While these protrusions increase friction to some extent, this design typically has the following inherent drawbacks:

[0004] First, existing technologies often use simple geometric combinations for the groove profile, such as a combination of straight sidewalls and a horizontal bottom. This design causes the contact stress to concentrate in localized areas such as the raised edges and corners of the groove when the rope is under force, forming obvious stress concentration points. Long-term, repeated friction and compression at these sharp corners can easily lead to the internal fibers being cut and flattened, thus accelerating aging and breakage, creating potential safety hazards.

[0005] Secondly, the longitudinal section of its protruding structure is mostly a simple rectangle or trapezoid, with consistent or indistinct width at the top and bottom. The edges of this "straight up and down" protrusion are relatively stiff, which can easily cause a scraping effect on the rope surface during braking, thus aggravating the wear of the rope's outer sheath. Utility Model Content

[0006] The purpose of this invention is to provide a wear-resistant rope pulley to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a wear-resistant rope wheel, comprising: a wheel disc and a rope groove arranged around the outer circumference of the wheel disc, the cross-section of the rope groove having a continuous S-shaped streamlined structure, and multiple protrusions alternately arranged on the two sides of the rope groove along the circumferential direction; the width of the end of the protrusion near the wheel disc axis is smaller than the width of the end away from the wheel disc axis, and the protrusion has a curved surface structure that is wider at the top and narrower at the bottom.

[0008] Optionally, the protrusions are staggered on the two sides of the S-shaped streamlined rope groove, and the projection of the protrusion on one side in the circumferential direction corresponds to the recessed area on the other side.

[0009] Optionally, the outline of the S-shaped streamlined rope groove is smoothly connected by multiple segments of curves with continuously varying curvature.

[0010] Optionally, the wheel includes a hub and spokes, and there are multiple spokes. Each spoke is uniformly radially connected between the hub and the rope groove in the circumferential direction, and a weight-reducing hole is formed between two adjacent spokes.

[0011] Optionally, the number of spokes is four, dividing the wheel disk into four fan-shaped weight-reducing holes.

[0012] Optionally, the wheel, the rope groove, and the protrusion are integrally formed by casting metal materials.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By using a continuous S-shaped corrugated surface for the rope groove to replace the straight or horizontal grooves in the existing technology, the sharp corners and stress concentration points at the contact between the rope and the groove are completely eliminated.

[0015] 2. By alternating and staggeredly arranging protrusions on both sides of the rope groove, a dynamic and distributed clamping force is formed. The curved protrusions, which are wider at the top and narrower at the bottom, provide a smooth transition contact surface, further preventing the risk of the rope being scratched by the edges of the protrusions. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention;

[0017] Figure 2 This is a schematic diagram of the rear structure of this utility model. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0019] like Figure 1 and 2 As shown, a wear-resistant rope reel comprises a reel disc 1 and a rope groove 2 surrounding the outer circumference of the reel disc 1. The cross-section of the rope groove 2 has a continuous S-shaped streamlined structure. Multiple protrusions 3 are alternately arranged on the two sides of the rope groove along the circumferential direction. The width of the protrusion 3 near the axis of the reel disc 1 is smaller than the width away from the axis of the reel disc 1, and the protrusion 3 has a curved surface structure that is wider at the top and narrower at the bottom. The reel disc 1 includes a hub 5 and spokes 4. Multiple spokes 4 are evenly radially connected between the hub 5 and the rope groove 2 along the circumference. Weight-reducing holes 6 are formed between adjacent spokes 4. For example, four spokes 4 divide the reel disc 1 into four fan-shaped weight-reducing holes 6.

[0020] The protrusions 3 are staggered on the two sides of the S-shaped streamlined rope groove 2, and the projection of the protrusion 3 on any side in the circumferential direction corresponds to the non-protrusion area on the other side. The outline of the S-shaped streamlined rope groove 2 is smoothly connected by multiple segments of continuously varying curvature curves.

[0021] In this invention, the wheel 1, rope groove 2, and the protrusions 3 are integrally cast from metal, avoiding damage to the rope caused by burrs during processing. Compared to traditional rope wheels that use square protrusions and horizontal surfaces, the cross-section of the rope groove in this invention uses an S-shaped curved surface to provide a continuous and smooth support and guiding path for the rope. When the rope slides or brakes in the groove, the force is evenly distributed across the entire curved surface, avoiding stress concentration at sharp corners, thereby fundamentally reducing the squeezing and cutting wear of the rope. The staggered arrangement of the curved surface protrusions, which are wider at the top and narrower at the bottom, ensures that the rope does not simultaneously come into full contact with the highest points of the protrusions on both sides, but rather contacts them alternately and in sections. This provides strong and uniform gripping force while avoiding severe indentations and fatigue along the same circumference of the rope, greatly extending the rope's lifespan. The wider upper end provides a larger contact area to distribute pressure; the narrower lower end smoothly transitions to the bottom of the groove, ensuring that the rope can be smoothly guided to the bottom of the groove without getting stuck on the sharp edges of the protrusions and being abraded. The entire bump itself is a streamlined guide block.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A wear-resistant rope wheel comprising a wheel disc (1) and a rope groove (2) arranged around the outer circumferential surface of the wheel disc (1), characterized in that: The cross-section of the rope groove (2) is a continuous S-shaped streamlined structure. Multiple protrusions (3) are alternately arranged on the two sides of the rope groove along the circumferential direction. The width of the end of the protrusion (3) near the axis of the wheel (1) is smaller than the width of the end away from the axis of the wheel (1). The protrusion (3) has a curved surface structure that is wider at the top and narrower at the bottom.

2. A wear resistant rope pulley according to claim 1, wherein The protrusions (3) are staggered on the two sides of the S-shaped streamlined rope groove (2), and the projection of the protrusions (3) on one side in the circumferential direction corresponds to the recessed area on the other side.

3. A wear resistant rope pulley according to claim 1, wherein The outline of the S-shaped streamlined rope groove (2) is smoothly connected by multiple segments of curves with continuously changing curvature.

4. A wear resistant rope pulley according to claim 1, wherein The wheel (1) includes a hub (5) and spokes (4). There are multiple spokes (4), and each spoke (4) is evenly radially connected between the hub (5) and the rope groove (2) in the circumferential direction. A weight-reducing hole (6) is formed between two adjacent spokes (4).

5. A wear resistant rope pulley according to claim 4, wherein The number of spokes (4) is four, which divide the wheel disk (1) into four fan-shaped weight-reducing holes (6).

6. A wear resistant rope pulley according to claim 1, wherein The wheel (1), the rope groove (2) and the protrusion (3) are integrally formed by casting metal materials.

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