Single bicycle pedal titanium alloy axle

Abstract

The utility model discloses a bicycle footstep titanium alloy axle center, including the titanium alloy main shaft of hollow structure and a plurality of ball bearings, titanium alloy main shaft's outer wall fixedly equipped with nitriding silicon ceramic ball bearings, titanium alloy main shaft's outer wall threadedly equipped with the nut of pressing, titanium alloy main shaft's left end is equipped with the annular recess of setting up, and the inner wall of annular recess places the bearing steel end cap. The utility model discloses through the introduction of bearing steel end cap, successfully isolated titanium alloy main shaft and high hardness ball bearings direct contact, fundamentally solved the wear and tear problem of titanium alloy hardness deficiency, makes the axle center still can keep stable under the long -term high load operation, and the collaborative design of front end ball bearings and terminal double bearings realizes light weight and high strength simultaneously, ensures low resistance lubrication and reasonable load distribution of transmission process, furthermore, adjustable gap structure effectively compensates manufacturing tolerance, makes assembly accuracy and operation reliability improve significantly.

Description

Technical Field

[0001] This utility model relates to the field of bicycle pedal technology, and in particular to a titanium alloy axle for bicycle pedals. Background Technology

[0002] As cycling becomes increasingly popular and professional, users are demanding higher performance from competitive bicycle components. As a key component for power transmission, the pedals not only bear the traditional rotational force of pedaling but also need to cope with more complex and multi-directional stress conditions. This places higher demands on the material performance and structural design of the pedals. Currently, most mainstream pedal axles on the market use stainless steel or chromium-molybdenum steel, which, while possessing certain strength and wear resistance, still have limitations in terms of lightweighting and overall mechanical performance. For high-end applications, titanium alloys, with their excellent specific strength and lightweight characteristics, have become an ideal material choice. However, titanium alloy axles have relatively low hardness (approximately HRC35–40), far lower than the hardness of bearing balls (HRC60–65). Under long-term high-load use, this hardness mismatch can easily lead to axle wear and fit failure, severely affecting service life and transmission efficiency. Therefore, we propose a titanium alloy axle for bicycle pedals to solve these problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a titanium alloy axle for bicycle pedals.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A titanium alloy axle for bicycle pedals includes a hollow titanium alloy spindle and multiple balls. A silicon nitride ceramic ball bearing is fixedly sleeved on the outer wall of the titanium alloy spindle, and a tension nut is threaded onto the outer wall of the titanium alloy spindle. An annular groove is formed at the left end of the titanium alloy spindle, and a bearing steel end cap is placed on the inner wall of the annular groove. An adjustment component is provided inside the titanium alloy spindle.

[0006] Preferably, the adjustment component includes a stainless steel top screw, the inner wall of the titanium alloy spindle is threadedly connected to the outer wall of the stainless steel top screw, and one end of the stainless steel top screw has an internal hexagonal hole, which provides an adjustment interface for the stainless steel top screw.

[0007] Preferably, the outer wall of the clamping nut contacts the outer wall of the silicon nitride ceramic ball bearing, thereby enhancing the axial fixing effect and improving the structural connection stability.

[0008] Preferably, the bearing steel end cap is located on the right side of the plurality of balls.

[0009] Preferably, the titanium alloy spindle has an internal hex wrench that is compatible with an internal hex socket and can be used to adjust the stainless steel top screw.

[0010] Compared with the prior art, the advantages of this utility model are:

[0011] This solution successfully isolates the titanium alloy spindle from direct contact with the high-hardness balls by introducing bearing steel end caps, fundamentally solving the wear problem caused by insufficient hardness of titanium alloy. This allows the spindle to remain stable under long-term high-load operation. The collaborative design of the front ball bearings and the dual end bearings achieves both lightweight and high strength while ensuring low-resistance lubrication and reasonable load distribution during transmission. In addition, the adjustable clearance structure effectively compensates for manufacturing tolerances, significantly improving assembly accuracy and operational reliability. Attached Figure Description

[0012] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a three-dimensional structural diagram of a titanium alloy axle for bicycle pedals proposed in this utility model.

[0014] Figure 2 This is a schematic cross-sectional view of a titanium alloy axle for bicycle pedals proposed in this utility model.

[0015] Figure 3 This is a front view structural diagram of a titanium alloy axle for bicycle pedals proposed in this utility model.

[0016] In the diagram: 1. Titanium alloy spindle; 2. Silicon nitride ceramic ball bearing; 3. Clamping nut; 4. Bearing steel end cap; 5. Ball bearing; 6. Stainless steel top screw; 7. Socket headstock; 8. Socket headstock wrench. Detailed Implementation

[0017] 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.

[0018] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this 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, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0019] Depend on Figures 1-3 As shown, a titanium alloy axle for bicycle pedals is disclosed, comprising a hollow titanium alloy spindle 1 and multiple ball bearings 5. The titanium alloy spindle 1 has excellent specific strength and lightweight characteristics, which not only meets the core load-bearing and force transmission requirements, but also reduces the overall weight, thus meeting the dual requirements of lightweight and high strength for high-end sports bicycles.

[0020] The outer wall of the titanium alloy spindle 1 is fixedly fitted with a silicon nitride ceramic ball bearing 2. The silicon nitride ceramic ball bearing 2 realizes the axial fixation and radial load bearing of the titanium alloy spindle 1, and works with the transmission structure to ensure low resistance lubrication and help the smooth operation process.

[0021] The outer wall of the titanium alloy spindle 1 is threaded with a clamping nut 3. The outer wall of the clamping nut 3 contacts the outer wall of the silicon nitride ceramic ball bearing 2. The clamping nut 3 strengthens the axial fixation effect and improves the structural connection stability by threading with the titanium alloy spindle 1 and contacting the outer wall of the silicon nitride ceramic ball bearing 2.

[0022] The left end of the titanium alloy spindle 1 is provided with an annular groove, and a bearing steel end cap 4 is placed on the inner wall of the annular groove. The bearing steel end cap 4 is located on the right side of multiple balls 5.

[0023] The titanium alloy spindle 1 is equipped with an adjustment component, which includes a stainless steel top screw 6. The stainless steel top screw 6 can be rotated to push the bearing steel end cap 4 to compensate for manufacturing and assembly dimensional tolerances, ensure the best fit of the components, and not affect the structural strength and operating performance.

[0024] The inner wall of the titanium alloy spindle 1 is threadedly connected to the outer wall of the stainless steel top screw 6. One end of the stainless steel top screw 6 is provided with an internal hexagonal hole 7, which provides an adjustment interface for the stainless steel top screw 6, making it convenient to insert the internal hexagonal wrench 8 and improving the ease of adjustment.

[0025] The titanium alloy spindle 1 contains an internal hex wrench 8, which is compatible with the internal hex socket 7 and can be rotated with a stainless steel top screw 6.

[0026] Working principle: The titanium alloy spindle 1 serves as the core load-bearing and force-transmitting component. While retaining the advantages of lightweight and high strength, its outer wall is axially fixed and radially loaded through silicon nitride ceramic ball bearings 2 and clamping nuts 3. The bearing steel end caps 4 have high hardness and strong wear resistance, effectively isolating the titanium alloy spindle 1 from direct contact and friction with the balls 5. This protects the titanium alloy spindle 1 from wear during long-term high-load operation and significantly improves the overall service life.

[0027] During operation, the ball bearing structure at the front end and the double bearing load-bearing structure at the end work together to ensure low-resistance lubrication and smoothness in the transmission process, and to achieve reasonable load distribution, taking into account multiple performance advantages such as lightweight, high strength and low friction.

[0028] Furthermore, the stainless steel top screw 6, through its built-in adjustment component, can be adjusted by inserting an Allen wrench 8 into the Allen hole 7. During the screwing process, the stainless steel top screw 6 can push the bearing steel end cap 4 forward, thereby adjusting the gap between the bearing steel end cap 4 and multiple balls 5. This design effectively compensates for dimensional tolerances that may occur during manufacturing and assembly, ensuring that each component is always in the best fit, without affecting the overall structural strength and operational performance, thus improving the applicability and reliability of the product.

[0029] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A titanium alloy axle for bicycle pedals, comprising a hollow titanium alloy spindle (1) and a plurality of ball bearings (5), characterized in that, The outer wall of the titanium alloy spindle (1) is fixedly fitted with a silicon nitride ceramic ball bearing (2), the outer wall of the titanium alloy spindle (1) is threaded with a tight nut (3), the left end of the titanium alloy spindle (1) is provided with an annular groove, the inner wall of the annular groove is placed with a bearing steel end cap (4), and the interior of the titanium alloy spindle (1) is provided with an adjustment component.

2. The titanium alloy axle for bicycle pedals according to claim 1, characterized in that, The adjustment assembly includes a stainless steel top screw (6), the inner wall of the titanium alloy spindle (1) is threaded to the outer wall of the stainless steel top screw (6), and one end of the stainless steel top screw (6) is provided with an internal hexagonal hole (7).

3. The titanium alloy axle for bicycle pedals according to claim 1, characterized in that, The outer wall of the clamping nut (3) is in contact with the outer wall of the silicon nitride ceramic ball bearing (2).

4. The titanium alloy axle for bicycle pedals according to claim 1, characterized in that, The bearing steel end cap (4) is located on the right side of the plurality of balls (5).

5. The titanium alloy axle for bicycle pedals according to claim 1, characterized in that, An internal hex wrench (8) is placed inside the titanium alloy spindle (1).

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