L-shaped spacer type back brake hub without fixed arm

Abstract

The utility model discloses a kind of L-shaped gasket type reverse brake hub without fixed arm, including hub main body, fixed sheet and connecting plate, the center of the hub main body is penetrated with shaft rod, the both ends of the shaft rod are equipped with locking nut, the other end of the hub main body is set to the fixed sheet, the side of the fixed sheet is equipped with protective gasket, the side of the protective gasket is equipped with limit nut, the bottom end of the fixed sheet is equipped with strip jack, the vertical edge of the connecting plate is equipped with the through-hole compatible with shaft rod, the horizontal edge of the connecting plate is inserted in strip jack, the both ends of the shaft rod are penetrated and set respectively in rear fork of vehicle frame, the vertical edge of the connecting plate is tightly connected to the side of rear fork of vehicle frame by locking nut. The L-shaped gasket type reverse brake hub without fixed arm is advanced in design, compact in structure, easy to install, discards the conspicuous and heavy fixed arm in traditional reverse brake hub and the design of additional connecting sheet, greatly improves the overall appearance of bicycle.

Description

Technical Field

[0001] This utility model belongs to the field of bicycle parts technology, specifically relating to an L-shaped washer-type reverse brake hub without a fixed arm. Background Technology

[0002] A reverse brake hub is a special bicycle rear wheel design that combines the function of a freewheel with a braking system. When the bicycle moves forward, the freewheel rotates with each pedal stroke, connecting to the reverse brake hub via threads, propelling the wheel forward. When braking is needed, the freewheel rotates in reverse, and the components in the reverse brake hub force the brake pads against the hub housing. The friction between the metal pads and the inner wall of the hub achieves braking, generating a large torque that attempts to reverse the rotation of the entire hub housing. Existing reverse brake hubs have a fixed arm at one end, which is either connected to a connecting plate or directly fixed to the bicycle frame's rear fork. Its purpose is to firmly resist this rotational torque, thereby transmitting the braking force to the frame and ultimately forcing the wheel to slow down and stop. Without this fixed arm, the reverse brake hub cannot function; when pedaling backward, the entire hub housing would spin freely on the bearings, failing to generate braking force. Therefore, this fixed arm, fixed to the frame, essentially provides a single and robust transmission path to the frame for the enormous internal force generated during braking. It "withstood" the internal braking force, thus turning the force applied by pressing down into the braking force.

[0003] However, attaching a conspicuous, bulky fixed arm and additional connecting plate to the frame significantly affects the appearance and complicates installation. Therefore, there is an urgent need to design an L-shaped spacer-type reverse brake hub without a fixed arm to solve these problems. Utility Model Content

[0004] The purpose of this utility model is to provide an L-shaped gasket-type reverse brake hub without a fixed arm, so as to solve the problems existing in the above-mentioned background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an L-shaped washer-type reverse brake hub without a fixed arm, comprising: The hub body has a shaft running through its center, a flywheel at one end of the hub body, and locking nuts at both ends of the shaft. A fixing plate is provided at the other end of the hub body. A protective pad is provided on one side of the fixing plate, a limiting nut is provided on one side of the protective pad, and a strip-shaped insertion hole is provided at the bottom end of the fixing plate. A connecting plate, wherein the vertical edge of the connecting plate is provided with a through hole adapted to the shaft, and the horizontal edge of the connecting plate is inserted into a strip-shaped insertion hole; The two ends of the shaft pass through the rear fork of the frame, and the locking nut abuts against the vertical edge of the connecting plate on one side of the rear fork of the frame.

[0006] Furthermore, a limiting protrusion is fixedly connected to the shaft, and the limiting protrusion is also fixedly connected to the brake mechanism inside the hub body.

[0007] Furthermore, the top of the fixing piece is provided with a through-hole that matches the limiting protrusion, and the fixing piece is fixedly sleeved with the limiting protrusion through the through-hole.

[0008] Furthermore, the hub body shell is made of high-wear-resistant high-chromium cast iron, the brake mechanism inside the hub body is made of high-carbon steel, and the bearing inside the hub body is made of high-carbon chromium bearing steel.

[0009] Furthermore, one end of the hub body is provided with a freewheel base, and the flywheel is connected to the freewheel base by a spline.

[0010] Furthermore, both ends of the shaft are provided with external threads that are compatible with the locking nuts.

[0011] Furthermore, the strip-shaped insertion hole on the fixing plate fits tightly against the horizontal edge of the connecting plate.

[0012] Furthermore, the protective gasket has a circular structure and is made of cast iron. The central diameter of the protective gasket is adapted to the outer diameter of the shaft, and the distance between the outer edge of the protective gasket and the shaft is less than the distance between the strip-shaped insertion hole and the shaft.

[0013] The technical effects and advantages of this utility model are as follows: This L-shaped pad-type reverse brake hub without a fixed arm features an advanced design, compact structure, convenient installation, and reliable operation. It eliminates the conspicuous and bulky fixed arm and additional connecting plate design found in traditional reverse brake hubs, greatly enhancing the overall aesthetics of the bicycle. The unique and ingenious cooperation between the connecting plate, the fixed plate, and the hub body not only ensures effective torque transmission during braking, resulting in stable and reliable braking performance, but also simplifies the installation process, allowing users to complete the installation more easily and quickly. Furthermore, the hub body is made of lightweight, high-strength aluminum alloy, while the internal braking mechanism and bearings are made of high-carbon steel and high-carbon chromium bearing steel, respectively. The application of these high-quality materials effectively reduces weight and improves durability while ensuring the overall strength of the hub, providing users with a superior and more convenient riding experience. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is the front view of the present invention; Figure 3This is a schematic diagram of the structure of the main body of the flower drum of this utility model; Figure 4 This is a schematic diagram of the structure of the fixing piece of this utility model; Figure 5 This is a schematic diagram of the connecting plate of this utility model.

[0015] In the diagram: 100, hub body; 101, shaft; 102, flywheel; 103, locking nut; 104, limiting protrusion; 200, fixing plate; 201, protective gasket; 202, limiting nut; 203, strip-shaped insertion hole; 204, through port; 300, connecting plate. Detailed Implementation

[0016] 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.

[0017] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0019] This utility model provides, for example Figure 1-5 The L-shaped washer-type reverse brake hub without a fixed arm shown includes: The hub body 100 has a shaft 101 running through its center. One end of the hub body 100 has a flywheel 102, and both ends of the shaft 101 have locking nuts 103. A fixing plate 200 is provided at the other end of the hub body 100. A protective pad 201 is provided on one side of the fixing plate 200, a limiting nut 202 is provided on one side of the protective pad 201, and a strip-shaped insertion hole 203 is provided at the bottom end of the fixing plate 200. The connecting plate 300 has a through hole on its vertical side that is adapted to the shaft 101, and the horizontal side of the connecting plate 300 is inserted into the strip-shaped insertion hole 203. The two ends of the shaft 101 pass through the rear fork of the frame, and the locking nut 103 abuts against the vertical edge of the connecting plate 300 on one side of the rear fork of the frame.

[0020] For example, see Figure 3 As shown, a limiting protrusion 104 is fixedly connected to the shaft 101, and the limiting protrusion 104 is also fixedly connected to the brake mechanism inside the hub body 100.

[0021] In this technical solution, the setting of the limiting protrusion 104 not only enhances the connection stability between the shaft 101 and the internal braking mechanism of the hub body 100, but also effectively prevents relative rotation between the shaft 101 and the braking mechanism during braking, thereby ensuring the accurate transmission of braking torque.

[0022] For example, see Figure 4 As shown, the top of the fixing piece 200 is provided with a through-hole 204 that matches the limiting protrusion 104, and the fixing piece 200 is fixedly sleeved with the limiting protrusion 104 through the through-hole 204.

[0023] In this technical solution, the design allows the fixing plate 200 to be securely connected to the limiting protrusion 104, while forming a tight integral structure with the hub body 100. When braking, the fixing plate 200 can effectively transmit the braking torque to the connecting plate 300, and then transmit the torque to the rear fork of the frame through the connecting plate 300, thus achieving a stable braking effect.

[0024] For example, the housing of the hub body 100 is made of high-chromium cast iron with high wear resistance, the braking mechanism inside the hub body 100 is made of high-carbon steel, and the bearing inside the hub body 100 is made of high-carbon chromium bearing steel.

[0025] In this technical solution, high-chromium cast iron has excellent wear resistance and corrosion resistance, which can maintain stable performance during long-term use, ensuring the reliability and durability of the hub; high-carbon steel has excellent wear resistance and impact resistance, which can maintain good performance during frequent braking, extending the service life of the braking mechanism; high-carbon chromium bearing steel has the characteristics of high hardness, high wear resistance and high precision, which can ensure the stability and low noise of the bearing during high-speed operation, providing users with a smoother riding experience.

[0026] For example, one end of the hub body 100 is provided with a freewheel base, and the freewheel 102 is connected to the freewheel base by a spline.

[0027] In this technical solution, the spline connection method has the advantages of strong connection, large torque transmission and good centering, which can ensure efficient transmission between the flywheel 102 and the freehub base, avoid slippage during riding, and improve riding safety and stability. At the same time, this connection method also facilitates the installation and removal of the flywheel 102, making it convenient for users to maintain and replace it.

[0028] For example, see Figures 1-3 As shown, the two ends of the shaft 101 are provided with external threads that are compatible with the locking nut 103.

[0029] In this technical solution, the design allows the locking nut 103 to be tightly screwed onto the shaft 101. By adjusting the tightness of the locking nut 103, the pressure between the connecting plate 300 and the rear fork of the frame can be precisely controlled, thereby ensuring the effective transmission of torque during braking. Simultaneously, the external thread design increases the connection strength between the shaft 101 and the locking nut 103, preventing loosening during braking and improving the overall reliability of the reverse brake hub.

[0030] For example, see Figure 1 , Figure 2 and Figure 4 As shown, the strip-shaped insertion hole 203 on the fixing plate 200 is tightly fitted with the horizontal edge of the connecting plate 300.

[0031] In this technical solution, the tight fit design ensures that the connecting plate 300 will not wobble within the strip-shaped insertion hole 203, thus guaranteeing the stability of torque transmission during braking. In actual use, when the braking force is applied to the fixing plate 200, due to the tight fit between the strip-shaped insertion hole 203 and the horizontal edge of the connecting plate 300, the torque can be accurately transmitted to the connecting plate 300, and then transmitted to the frame through the connecting plate 300, achieving an effective braking effect.

[0032] For example, see Figures 1-2 As shown, the protective gasket 201 has a circular structure and is made of cast iron. The central hole diameter of the protective gasket 201 is matched with the outer diameter of the shaft 101. The distance between the outer edge of the protective gasket 201 and the shaft 101 is less than the distance between the strip-shaped insertion hole 203 and the shaft 101.

[0033] In this technical solution, the annular protective pad 201 can evenly distribute the pressure generated during braking, avoiding damage to parts due to excessive local pressure. It is made of cast iron, which has high strength and wear resistance, and can withstand the huge force generated during braking, effectively protecting adjacent parts. The central hole diameter of the protective pad 201 is precisely matched with the outer diameter of the shaft 101, ensuring that the protective pad 201 can be accurately installed on the shaft 101 and avoiding misalignment. In addition, the distance between the outer edge of the protective pad 201 and the shaft 101 is less than the distance between the strip-shaped insertion hole 203 and the shaft 101. This design ensures that the horizontal edge of the connecting plate 300 will not be interfered with by the protective pad 201 when it is inserted into the strip-shaped insertion hole 203 on the fixing plate 200.

[0034] Working principle: When using this L-shaped washer-type reverse brake hub without a fixed arm, as the rider pedals to propel the bicycle forward, the chain drives the freewheel 102 to rotate, which in turn drives the hub body 100 to rotate, thus propelling the entire wheel forward. Under normal riding conditions, due to the tight fit between the connecting plate 300, the fixed plate 200, and the hub body 100, and the precise positioning of the locking nut 103 on the connecting plate 300, the entire reverse brake hub structure remains stable and will not wobble or loosen. When braking is required, the rider pedals in the opposite direction, and the freewheel 102 rotates in the opposite direction. The braking mechanism inside the hub body 100 begins to operate, pressing the brake pads against the inner wall of the hub housing. Braking force is generated through the friction between the metal pads and the inner wall of the hub. During this process, the enormous torque generated during braking is transmitted through the fixing plate 200 to the connecting plate 300, and then from the connecting plate 300 to the rear fork of the frame, thus achieving an effective braking effect. Due to the protective pad 201, the pressure generated during braking is evenly distributed, preventing damage to parts due to excessive local pressure. At the same time, the wear-resistant properties of the protective pad 201 ensure that it maintains good performance during frequent friction, extending its service life. The entire braking process is stable and reliable, and installation is simple and efficient, providing users with a superior and convenient riding experience. Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An L-shaped washer-type reverse brake hub without a fixed arm, characterized in that, include: The hub body (100) has a shaft (101) running through its center. One end of the hub body (100) has a flywheel (102), and both ends of the shaft (101) have locking nuts (103). A fixing plate (200) is provided at the other end of the hub body (100). A protective pad (201) is provided on one side of the fixing plate (200), a limiting nut (202) is provided on one side of the protective pad (201), and a strip-shaped insertion hole (203) is provided at the bottom end of the fixing plate (200). A connecting plate (300) has a through hole on its vertical side that is adapted to the shaft (101), and the horizontal side of the connecting plate (300) is inserted into a strip-shaped insertion hole (203). The two ends of the shaft (101) are respectively installed through the rear fork of the frame, and the locking nut (103) abuts against the vertical edge of the connecting plate (300) on one side of the rear fork of the frame.

2. The L-shaped washer type reverse brake hub without a fixed arm according to claim 1, characterized in that: A limiting protrusion (104) is fixedly connected to the shaft (101), and the limiting protrusion (104) is also fixedly connected to the brake mechanism inside the hub body (100).

3. The L-shaped washer-type reverse brake hub without a fixed arm according to claim 2, characterized in that: The top of the fixing piece (200) is provided with a through-hole (204) that matches the limiting protrusion (104), and the fixing piece (200) is fixedly sleeved with the limiting protrusion (104) through the through-hole (204).

4. The L-shaped washer type reverse brake hub without a fixed arm according to claim 1, characterized in that: The housing of the hub body (100) is made of high wear-resistant high-chromium cast iron, the brake mechanism inside the hub body (100) is made of high carbon steel, and the bearing inside the hub body (100) is made of high carbon chromium bearing steel.

5. The L-shaped washer type reverse brake hub without a fixed arm according to claim 1, characterized in that: One end of the hub body (100) is provided with a base, and the flywheel (102) is connected to the base by a spline.

6. The L-shaped washer type reverse brake hub without a fixed arm according to claim 1, characterized in that: The shaft (101) has external threads at both ends that are compatible with the locking nut (103).

7. The L-shaped washer-type reverse brake hub without a fixed arm according to claim 1, characterized in that: The strip-shaped insertion hole (203) on the fixing plate (200) fits tightly against the horizontal edge of the connecting plate (300).

8. The L-shaped washer type reverse brake hub without a fixed arm according to claim 1, characterized in that: The protective pad (201) has a circular structure and is made of cast iron. The central hole diameter of the protective pad (201) is adapted to the outer diameter of the shaft (101). The distance between the outer edge of the protective pad (201) and the shaft (101) is less than the distance between the strip-shaped insertion hole (203) and the shaft (101).

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