Lightweight hub suitable for roller brake

Abstract

The utility model provides a light-weight hub suitable for a roller brake. The light-weight hub comprises a shell and roller blades. The shell is provided with a through cavity, one end of the roller blade extends into the through cavity, and a spline is arranged at the end, away from the shell, of the roller blade and arranged in the axis direction of the roller blade. And the roller blades are in threaded connection with the shell. During installation, the roller blade is screwed into the through cavity, and the roller blade is in threaded connection with the shell. The roller blades and the shell which are in threaded connection have high mechanical strength, the change of the size and the weight of the hub is small, the requirement for light weight of a vehicle is met, the roller blades and the shell are convenient to disassemble and maintain, and the maintenance cost is low.

Description

Technical Field

[0001] The utility model belongs to the technical field of bicycles, and in particular relates to a lightweight hub suitable for roller brakes. Background Art

[0002] Roller brakes, also known as drum brakes or roller brakes, have the characteristics of silent braking, smooth and comfortable braking, no locking; not afraid of water and oil, not affected by rain; very stable structure, good high-speed performance; modular, easy and quick to disassemble and assemble; no need to change brake blocks, and extremely long service life. As people pursue lightweight bicycles, the size of the hub is getting smaller and smaller, the hub flange is getting lower and lower, and the material will be selected from aluminum or carbon fiber. This type of hub with a low flange is usually difficult to connect to the roller brake, and the roller blades on the hub connected to the roller brake are easily damaged, the maintenance convenience is poor, and the maintenance cost is high.

[0003] Therefore, the above problems need to be solved urgently. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the utility model provides a lightweight hub suitable for roller brakes. The hub has a small volume and weight, meets the requirements of lightweight vehicles, is easy to disassemble and maintain, and has low maintenance costs.

[0005] Technical solution: In order to achieve the above-mentioned purpose, the utility model provides a lightweight hub suitable for roller brakes, including a shell and roller blades. The shell is provided with a through cavity, one end of the roller blade extends into the through cavity, and the end of the roller blade away from the shell is provided with a spline, and the spline is arranged along the axis direction of the roller blade. The roller blade and the shell are threadedly connected. During installation, the roller blade is screwed into the through cavity, and the roller blade and the shell are threadedly connected. The spline and the roller brake form a shaft key connection. The threaded roller blades and shell have strong mechanical strength, and the volume and weight of the hub change little, which meets the lightweight requirements of the vehicle, and the roller blades and the shell are easy to disassemble and repair, and the maintenance cost is low.

[0006] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, the through cavity includes a first cavity, a second cavity, and a third cavity. The first cavity, the second cavity, and the third cavity are arranged in sequence, the diameter of the first cavity is larger than the diameter of the second cavity, the first cavity and the second cavity form a first step, the diameter of the second cavity is smaller than the diameter of the third cavity, and the second cavity and the third cavity form a second step.

[0007] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, the inner wall of the first chamber is provided with an inner thread, and the end of the roller blade extending into the first chamber is provided with an outer thread. When installed, the inner thread and the outer thread are meshed.

[0008] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, a locking screw 3 is provided in the through cavity 11. A threaded portion 31 is provided on the outer wall of the locking screw 3 close to the roller blade 2, and a limiting shoulder 32 is provided on the end of the locking screw 3 away from the roller blade 2. The roller blade 2 is provided with a hollow cavity 21, and an inner thread is provided on the inner wall of the hollow cavity 21. During installation, the roller blade 2 is screwed into the first cavity 111, the locking screw 3 is inserted into the third cavity 113, the threaded portion 31 is screwed into the hollow cavity 21, and the shoulder 32 abuts against the second step 115. The locking screw 3 locks the roller blade 2 on the housing 1 to prevent the roller blade from loosening during use.

[0009] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, the locking screw is a hollow cylinder.

[0010] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, for easy installation, a step hole is provided at one end of the through cavity near the roller blade. The roller blade is provided with a positioning step corresponding to the step hole. During installation, the positioning step is embedded in the step hole. The positioning step and the step hole are provided to reduce the width of the roller brake and the hub after installation, shorten the length of the bicycle shaft, improve the structural strength, and reduce the weight.

[0011] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, ring ears are provided at both ends of the shell, and the ring ear array has a plurality of spoke holes.

[0012] Furthermore, in the above-mentioned lightweight hub suitable for roller brakes, the roller blades are made of aluminum.

[0013] It can be seen from the above technical scheme that the utility model has the following beneficial effects: the utility model is suitable for lightweight hubs of roller brakes, the roller blades and housings connected by thread have strong mechanical strength, and the volume and weight of the hubs change little, which meets the requirements of lightweight vehicles, and the roller blades and housings are easy to disassemble and repair, and the maintenance cost is low. The locking screw locks the roller blades on the housing to prevent the roller blades from loosening during use. The positioning step and the step hole are set to reduce the width of the roller brake and the hub after installation, shorten the length of the bicycle shaft, improve the structural strength, and reduce the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a cross-sectional view of a lightweight hub suitable for roller brakes according to the utility model.

[0015] In the figure: 1, shell, 11, through cavity, 111, first chamber, 1111, internal thread, 112, second chamber, 113, third chamber, 114, first step, 115, second step, 116, step hole, 12, ring ear, 2, roller blade, 21, hollow cavity, 22, spline, 23, external thread, 24, positioning step, 3, locking screw, 31, threaded portion, 32, limiting shoulder. DETAILED DESCRIPTION

[0016] Example 1

[0017] like Figure 1 A lightweight hub suitable for roller brakes shown in the figure comprises a shell 1 and roller blades 2. The shell 1 and the roller blades 2 are hollow cylinders. The shell 1 is provided with a through cavity 11, one end of the roller blade 2 extends into the through cavity 11, and a spline 22 is provided at the end of the roller blade 2 away from the shell 1, and the spline 22 is arranged along the axis direction of the roller blade 2. The roller blade 2 and the shell 1 are threadedly connected. The through cavity 11 comprises a first chamber 111, a second chamber 112, and a third chamber 113. The first chamber 111, the second chamber 112, and the third chamber 113 are arranged in sequence, the diameter of the first chamber 111 is larger than the diameter of the second chamber 112, the first chamber 111 and the second chamber 112 form a first step 114, the diameter of the second chamber 112 is smaller than the diameter of the third chamber 113, and the second chamber 112 and the third chamber 113 form a second step 115. An inner thread 1111 is provided on the inner wall of the first chamber 111, and an outer thread 23 is provided on the end of the roller blade 2 extending into the first chamber 111. A locking screw 3 is provided in the through-chamber 11. A threaded portion 31 is provided on the outer wall of the locking screw 3 close to the roller blade 2, and a limiting shoulder 32 is provided on the end of the locking screw 3 away from the roller blade 2. The roller blade 2 is provided with a hollow cavity 21, and an inner thread is provided on the inner wall of the hollow cavity 21. The locking screw 3 locks the roller blade 2 to the shell 1. For ease of installation, a step hole 116 is provided on the end of the through-chamber 11 close to the roller blade 2. The roller blade 2 is provided with a positioning step 24 corresponding to the step hole 116. Ring ears 12 are provided at both ends of the shell 1, and the array of the ring ears 12 has a plurality of spoke holes. The roller blade 2 is made of aluminum.

[0018] During installation, the spline 22 and the roller brake form a shaft key connection. The roller blade 2 is screwed into the first chamber 111, the positioning step 24 is embedded in the step hole 116, and the internal thread 1111 and the external thread 23 are meshed and locked. The locking screw 3 penetrates into the third chamber 113, and the threaded portion 31 of the locking screw 3 is screwed into the hollow cavity 21 of the roller blade 2, and the shoulder 32 abuts against the second step 115. The locking screw 3 locks the roller blade 2 on the housing 1.

[0019] The above embodiments are exemplary, and their purpose is to illustrate the technical concept and features of the utility model so that people familiar with this field can understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A lightweight hub suitable for roller brakes, characterized in that: The invention comprises a shell (1) and a roller blade (2); the shell (1) is provided with a through cavity (11), one end of the roller blade (2) extends into the through cavity (11), and the end of the roller blade (2) away from the shell (1) is provided with a spline (22), and the spline (22) is arranged along the axis direction of the roller blade (2); the roller blade (2) and the shell (1) are threadedly connected.

2. The lightweight hub suitable for roller brakes according to claim 1, characterized in that: The through cavity (11) comprises a first cavity (111), a second cavity (112), and a third cavity (113); the first cavity (111), the second cavity (112), and the third cavity (113) are arranged in sequence; the diameter of the first cavity (111) is greater than the diameter of the second cavity (112); the first cavity (111) and the second cavity (112) form a first step (114); the diameter of the second cavity (112) is less than the diameter of the third cavity (113); the second cavity (112) and the third cavity (113) form a second step (115).

3. The lightweight hub suitable for roller brakes according to claim 2, characterized in that: The inner wall of the first chamber (111) is provided with an internal thread (1111), and one end of the roller blade (2) extending into the first chamber (111) is provided with an external thread (23); during installation, the internal thread (1111) and the external thread (23) are meshed.

4. The lightweight hub suitable for roller brakes according to claim 2, characterized in that: A locking screw (3) is provided in the through cavity (11); a threaded portion (31) is provided on the outer wall of one end of the locking screw (3) close to the roller blade (2), and a limiting shoulder (32) is provided on the end of the locking screw (3) away from the roller blade (2); the roller blade (2) is provided with a hollow cavity (21), and an inner wall of the hollow cavity (21) is provided with an internal thread; during installation, the roller blade (2) is screwed into the first cavity (111), the locking screw (3) is inserted into the third cavity (113), the threaded portion (31) is screwed into the hollow cavity (21), and the shoulder (32) abuts against the second step (115); the locking screw (3) locks the roller blade (2) onto the housing (1).

5. The lightweight hub suitable for roller brakes according to claim 4, characterized in that: The locking screw (3) is a hollow cylinder.

6. The lightweight hub suitable for roller brakes according to claim 1, characterized in that: The through cavity (11) is provided with a step hole (116) at one end close to the roller blade (2); the roller blade (2) is provided with a positioning step (24) corresponding to the step hole (116); during installation, the positioning step (24) is embedded in the step hole (116).

7. The lightweight hub suitable for roller brakes according to claim 1, characterized in that: Ring ears (12) are provided at both ends of the shell (1), and the ring ears (12) have a plurality of spoke holes in an array.

8. The lightweight hub suitable for roller brakes according to claim 1, characterized in that: The roller blades (2) are made of aluminum.

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