Impact-resistant weight-reducing rim

Abstract

The utility model relates to the field of bicycle manufacturing, in particular to a bicycle rim, in particular to an impact-resistant weight-reducing rim, which solves the problem that the impact energy of the rim is insufficiently absorbed, can fully absorb the impact energy through an energy absorption box and a buffer cavity and reduces the damage of the rim, and comprises an annular rim body, energy absorption boxes which are distributed in the circumferential direction are arranged on the outer circumferential wall of the rim body and close to wheel flanges on the left side and the right side, and annular cavities are formed in the energy absorption boxes; a cavity outer wall is arranged in the middle area of the outer circumferential wall of the rim body, and the cavity outer wall and the outer circumferential wall of the rim body form a buffer cavity distributed in the circumferential direction.

Description

Technical Field

[0001] This utility model relates to the field of bicycle manufacturing, and in particular to bicycle rims, specifically to an impact-resistant and weight-reducing rim. Background Technology

[0002] Bicycles are a common mode of transportation, mainly composed of a frame, front and rear wheels, a braking system, and a drivetrain. The main components of the front and rear wheels include the tire, rim, spokes, and hub. The tire is the outermost part, directly contacting the road surface and providing support while reducing rolling resistance and impact. The rim forms the skeleton of the front and rear wheels, providing support for the tire and bearing the pressure of the tire. Therefore, rim design needs to consider factors such as strength, durability, and weight.

[0003] In existing bicycle designs, rim design primarily considers structural strength and durability. In certain situations, insufficient absorption of excessive impact energy during riding can lead to rim damage. The main source of impact energy is collision. During normal riding, bicycles travel at high speeds on roads, colliding with curbs, protruding objects, potholes, etc.; in mountainous environments, they encounter various rocks and cracks. The tires cannot completely absorb the impact force; some is transferred to the rim, causing deformation and damage. Another possibility is insufficient tire pressure, reducing the cushioning effect and transferring the impact force to the rim. Abnormal riding, such as collisions between the rim sidewalls and protrusions, can also cause rim deformation. Utility Model Content

[0004] This invention provides an impact-resistant and weight-reducing wheel rim that solves the problem of insufficient impact energy absorption by the wheel rim. Through the energy-absorbing box and buffer cavity, it can fully absorb impact energy and reduce damage to the wheel rim.

[0005] This utility model is achieved through the following technical solution:

[0006] An impact-resistant and weight-reducing wheel rim includes an annular wheel rim body. Energy-absorbing boxes are provided on the outer circumferential wall of the wheel rim body near the left and right rim edges. The energy-absorbing boxes are provided with annular cavities.

[0007] The outer circumferential wall of the rim body is provided with a cavity outer wall in the middle region, and the cavity outer wall and the outer circumferential wall of the rim body form a circumferentially distributed buffer cavity.

[0008] Furthermore, the energy-absorbing box has a square cross-section, and the buffer cavity has a flat cross-section that gradually narrows from the middle to the left and right sides.

[0009] Furthermore, the energy-absorbing box has an outwardly protruding bead hook on the top outer side near the center area of ​​the rim body.

[0010] Furthermore, the side wall of the buffer cavity is provided with mounting holes for fixed connection with the spokes.

[0011] Furthermore, the rim body has a pre-drilled hole for mounting an air nozzle.

[0012] Furthermore, the energy-absorbing box is made of 6-series aluminum alloy.

[0013] The beneficial effects achieved by this utility model compared with the prior art are as follows:

[0014] 1. Energy-absorbing boxes are located on the left and right rim flanges of the rim body, and a buffer cavity is located in the middle area of ​​the outer circumferential wall of the rim body to enhance energy absorption capacity. This allows the rim to absorb more impact energy during riding and reduce rim damage caused by large impacts.

[0015] 2. Compared with ordinary wheel rims of the same weight, this utility model has a greater impact resistance;

[0016] 3. The design of the buffer cavity and energy-absorbing box not only improves the structural strength and reduces the weight of the rim, but also improves the lateral and radial structural strength of the rim and prevents rim deformation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the impact-resistant and weight-reducing wheel rim described in this utility model;

[0018] Figure 2 This is a cross-sectional schematic diagram of the rim body described in this utility model;

[0019] In the diagram: 1. Wheel rim body, 2. Energy absorption box, 3. Tire bead hook, 4. Outer wall of the cavity, 5. Buffer cavity, 6. Mounting hole. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0022] This embodiment discloses an impact-resistant and weight-reducing wheel rim, such as Figure 1-2 As shown, the main components include an annular rim body 1. Energy-absorbing boxes 2 are circumferentially distributed on the outer circumferential wall of the rim body 1 near the left and right rim flanges. Each energy-absorbing box 2 contains an annular cavity and has a square cross-section. The energy-absorbing boxes 2 are made of 6-series aluminum alloy. Compared to steel rims in the prior art, aluminum alloy is 69% lighter than steel and absorbs 50% more energy during a collision. In this embodiment, the suitable material is 61-T6 aluminum alloy. A protruding bead hook 3 is machined on the top outer side of the energy-absorbing box 2 near the center area of ​​the rim body 1, allowing for easy installation and fixation of the tire bead.

[0023] The performance evaluation indicators for energy-absorbing box 2 mainly include cushioning capacity, energy absorption, and displacement. The hollow design in this case provides a significantly greater cushioning capacity than a fixed tire section of the same wall thickness. Under the same conditions, the hollow design exhibits better energy absorption characteristics than other designs. The hollow design also provides greater displacement than other designs.

[0024] An outer wall 4 of a cavity is machined in the middle region of the outer circumferential wall of the rim body 1. The outer wall 4 of the cavity and the outer circumferential wall of the rim body 1 form a circumferentially distributed buffer cavity 5. The cross-section of the buffer cavity 5 is a flat structure that gradually narrows from the middle to the left and right sides, and has energy absorption capacity while ensuring that the tire bead can be installed.

[0025] Multiple mounting holes 6 are machined on the side wall of the buffer cavity 5 to facilitate fixed connection with the spokes, and then connected to the bearing hub through the spokes. Air valve mounting holes 6 are reserved on the rim body 1 to facilitate the subsequent installation of other tire components.

[0026] By providing energy-absorbing boxes 2 on the left and right rim flanges of the rim body 1 and a buffer cavity 5 in the middle area of ​​the outer circumferential wall of the rim body 1, the energy absorption capacity is enhanced. When a collision occurs during riding (generally concentrated at the rim flange), the energy-absorbing box 2 deforms after the collision, reducing damage to the rim and thus extending the service life of the rim.

Claims

1. An impact-resistant and weight-reducing wheel rim, characterized in that, The rim body includes an annular rim body, and the outer circumferential wall of the rim body is provided with circumferentially distributed energy-absorbing boxes near the left and right rim edges, and the energy-absorbing boxes are provided with annular cavities. The outer circumferential wall of the rim body is provided with a cavity outer wall in the middle region, and the cavity outer wall and the outer circumferential wall of the rim body form a circumferentially distributed buffer cavity.

2. The impact-resistant and weight-reducing rim according to claim 1, characterized in that, The energy-absorbing box has a square cross-section, and the buffer cavity has a flat cross-section that gradually narrows from the middle to the left and right sides.

3. The impact-resistant and weight-reducing rim according to claim 2, characterized in that, The energy-absorbing box has an outwardly protruding tire bead hook on the top outer side near the center area of ​​the rim body.

4. The impact-resistant and weight-reducing rim according to claim 2, characterized in that, The side wall of the buffer cavity is provided with mounting holes for fixed connection with the spokes.

5. The impact-resistant and weight-reducing rim according to claim 1, characterized in that, The rim body has a pre-drilled hole for mounting an air nozzle.

6. The impact-resistant and weight-reducing wheel rim according to any one of claims 1-5, characterized in that, The energy-absorbing box is made of 6-series aluminum alloy.

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