Rear hub forward driving device on bicycle

Abstract

The invention relates to the technical field of bicycle spare and accessory parts, and discloses a rear hub forward driving device on a bicycle, which comprises a hub body and a bearing mounted on the inner side of the hub body in an interference fit manner, and a mandrel is arranged on the inner side of the bearing in an interference fit manner in a penetrating manner; a magnetic ring and a driving block are sequentially arranged on the inner side of the inner steel ring from left to right, a plurality of spherical steel columns are arranged between the inner steel ring and the driving block, and a ratchet wheel base is installed at one end of the driving block. The hub is mainly composed of the hub body, the mandrel, the mandrel external thread groove, the inner steel ring, the magnetic ring, the spherical steel column, the driving block, the ratchet wheel seat and the positioning cap, when the spherical steel column and the inner steel ring are completely clamped, transmission power is higher, zero-angle driving is achieved, and instant meshing treading torque and stability are higher; the point contact resistance is small, the cost is low, and the assembly is convenient; when the spherical steel column and the inner steel ring are completely separated, the spherical steel column is in an idling state and is free of noise, zero in resistance and long in inertia.

Description

Technical Field

[0001] The invention relates to the technical field of bicycle parts and accessories, in particular to a rear hub forward driving device on a bicycle. Background Art

[0002] The bicycle hub connects the spokes and the axle. It is a relatively important part of the bicycle. The average speed of riding a bicycle is directly affected by the quality of the hub. It gets its name because it stands up like a hub, hence the name. The hub is divided into the front hub and the rear hub. The rear hub is the main component for driving the bicycle forward, and it drives the wheel set through a ratchet.

[0003] A Chinese patent discloses a bicycle rear wheel hub structure (authorization announcement number CN114801584A). The patented technology includes a hub shell, a flywheel installed at one end of the hub shell, and a hub spindle fixed to the hub shell through a bearing. The flywheel is screwed to one end of the hub shell through a driving body, and the driving body is fixed to the hub spindle through a bearing sleeve. One end of the hub shell is fixed to the flywheel through a driving body, and the driving body is fixed to the hub shell through a bearing sleeve, and one end of the driving body is fixed to the hub shell through a bearing and the other end is screwed to the flywheel. A brake is also installed between the flywheel and the hub shell. The brake box in the brake is fixed to the driving body through a brake bearing, and the brake disc in the brake is sleeved on the corresponding end of the hub shell. One end of the driving body is a step end, which is convenient for fixing the brake bearing. The step end also extends a threaded end to facilitate the rotation and fixing of the flywheel. It has good braking effect, more reasonable layout, more compact structure, and practical value. However, it has poor power transmission during transmission and has certain resistance when idling. Summary of the invention

[0004] The object of the present invention is to provide a rear hub forward driving device on a bicycle to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: A rear hub forward drive device on a bicycle comprises a hub body and a bearing installed inside the hub body by interference fit, a core shaft is provided through the inner side of the bearing by interference fit, an inner steel ring is installed on one end of the inner side of the hub body close to the bearing, a magnetic ring and a drive block are arranged on the inner side of the inner steel ring in sequence from left to right, and a plurality of spherical steel columns are arranged between the inner steel ring and the drive block, a ratchet seat is installed on one end of the drive block, and a positioning cap is installed on one end of the core shaft located on the outer side of the ratchet seat.

[0006] As a further solution of the invention: the inner side wall of the hub body is provided with a hub internal thread groove, the outer side of the inner steel rim is provided with a steel rim external thread groove, and the hub body and the inner steel rim are meshed and connected with each other through the hub internal thread groove and the steel rim external thread groove.

[0007] As a further solution of the present invention: one end of the inner steel ring is provided with four grooves and the inner side of the inner steel ring is provided with a plurality of straight grooves for more effective engagement and disengagement.

[0008] As a further solution of the present invention: an external thread groove of the driving block is provided at one end of the outer side of the driving block, and a plurality of limit grooves are provided at the other end of the outer side of the driving block, an internal thread groove of the ratchet seat is provided on the inner side of the ratchet seat, the driving block and the ratchet seat are meshedly connected through the external thread groove of the driving block and the internal thread groove of the ratchet seat, and the spherical steel column is located on the inner side of the corresponding limit groove.

[0009] As a further solution of the present invention: the outer side of the core shaft is provided with a core shaft external thread groove, the inner side of the positioning cap is provided with a positioning cap internal thread groove, and the core shaft and the positioning cap are meshedly connected via the core shaft external thread groove and the positioning cap internal thread groove.

[0010] As a further solution of the present invention: the spherical steel column is composed of a ball head and a cylinder, and a plurality of straight grooves and other non-cylindrical shapes are added outside the cylinder to cooperate with the engagement and disengagement with the inner steel ring, wherein the ball head and the magnetic ring are in point contact, and the cylinder is located on the inner side of the limit groove.

[0011] As a further solution of the present invention: the magnetic ring is made of high temperature resistant permanent magnet.

[0012] Compared with the prior art, the present invention has the following beneficial effects: The present invention mainly consists of a hub body, a spindle, an outer thread groove of the spindle, an inner steel ring, a magnetic ring, a spherical steel column, a driving block, a ratchet seat and a positioning cap, wherein the magnetic ring and the spherical steel column are installed together in a point contact manner, and when the spherical steel column and the inner steel ring are completely clamped, the transmission power is stronger, the zero-angle drive, the instantaneous bite pedaling torque and the stability are higher; the point contact resistance is small, the cost is low, and the assembly is convenient; when the spherical steel column and the inner steel ring are completely separated, they are in an idling state, with no noise, zero resistance, and long inertia. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the exploded structure of a rear hub forward driving device on a bicycle; Figure 2 It is a cross-sectional schematic diagram of a rear hub forward driving device on a bicycle; Figure 3 The invention is a cross-sectional schematic diagram of a clockwise clamping drive in a rear hub forward drive device on a bicycle; Figure 4 for Figure 3 A schematic diagram of the enlarged structure of part A; Figure 5It is a schematic diagram of a completely separated counterclockwise cross section of a rear hub forward drive device on a bicycle; Figure 6 for Figure 4 Schematic diagram of the enlarged structure of part B.

[0014] In the figure: 10, hub body; 101, bearing; 102, inner thread groove of hub; 20, spindle; 201, outer thread groove of spindle; 30, inner steel ring; 301, outer thread groove of steel ring; 302, groove; 40, magnetic ring; 50, spherical steel column; 60, drive block; 601, limit groove; 602, outer thread groove of drive block; 70, ratchet seat; 701, inner thread groove of ratchet seat; 80, positioning cap; 801, inner thread groove of positioning cap. DETAILED DESCRIPTION

[0015] See also Figures 1 to 6 In an embodiment of the present invention, a rear hub forward driving device on a bicycle includes a hub body 10 and a bearing 101 installed on the inner side of the hub body 10 by interference fit, a core shaft 20 is penetrated through the inner side of the bearing 101 by interference fit, an inner steel ring 30 is installed on the inner side of the hub body 10 near the bearing 101, a magnetic ring 40 and a driving block 60 are arranged on the inner side of the inner steel ring 30 from left to right, and a plurality of spherical steel columns 50 are arranged between the inner steel ring 30 and the driving block 60, a ratchet seat 70 is installed on one end of the driving block 60, and a positioning cap 80 is installed on the outer side of the ratchet seat 70 at one end of the core shaft 20.

[0016] exist Figure 1 In the figure, the inner wall of the hub body 10 is provided with a hub internal thread groove 102, and the outer side of the inner steel rim 30 is provided with a steel rim external thread groove 301. The hub body 10 and the inner steel rim 30 are meshed and connected with each other through the hub internal thread groove 102 and the steel rim external thread groove 301; thus, the hub body 10 and the inner steel rim 30 can be securely installed together.

[0017] exist Figure 1 In the embodiment, one end of the inner steel ring (30) is provided with four grooves (302) and the inner side of the inner steel ring (30) is provided with a plurality of straight grooves for more effective engagement and disengagement. By inserting a wrench into the groove 302, the inner steel ring 30 can be conveniently installed in the hub body 10 or removed from the hub body 10.

[0018] exist Figure 1In the figure, a driving block external thread groove 602 is provided at one end of the outer side of the driving block 60, and a plurality of limiting grooves 601 are provided at the other end of the outer side of the driving block 60, and a ratchet seat internal thread groove 701 is provided on the inner side of the ratchet seat 70. The driving block 60 and the ratchet seat 70 are meshedly connected with each other through the driving block external thread groove 602 and the ratchet seat internal thread groove 701, and the spherical steel column 50 is located on the inner side of the corresponding limiting groove 601, so that by rotating the ratchet seat 70, the driving block 60 can be driven to rotate together.

[0019] exist Figure 1 In the figure, an outer side of the core shaft 20 is provided with a core shaft external thread groove 201, and an inner side of the positioning cap 80 is provided with a positioning cap internal thread groove 801. The core shaft 20 and the positioning cap 80 are meshed and connected by the core shaft external thread groove 201 and the positioning cap internal thread groove 801. By fixing the positioning cap 80 on the core shaft 20, the ratchet seat 70 is limited, so that the ratchet seat 70 and the core shaft 20 are fixed together.

[0020] exist Figure 1 and Figure 2 In the embodiment, the spherical steel column (50) is composed of a ball head and a cylinder, and a plurality of straight grooves and other non-cylindrical shapes are added outside the cylinder to cooperate with the inner steel ring (30) to engage and disengage, wherein the ball head and the magnetic ring (40) are in point contact, and the cylinder is located on the inner side of the limit groove (601), wherein the ball head and the magnetic ring 40 are in point contact, and the cylinder is located on the inner side of the limit groove 601, and when the spherical steel column 50 and the inner steel ring 30 are fully clamped, the transmission power is stronger, the zero-angle drive, the instantaneous engagement pedaling torque and the stability are higher; and the point contact resistance is small, the cost is low, and the assembly is convenient.

[0021] exist Figure 1 and Figure 2 In the embodiment, the magnetic ring 40 is made of high temperature resistant permanent magnets, so that the magnetic ring 40 will not fail during the long-term movement of the bicycle.

[0022] Preferably, the hub body 10 and the bearing 101 installed on the inner side of the hub body 10 by interference fit, the inner side of the bearing 101 is penetrated by a core shaft 20 by interference fit, the inner side of the hub body 10 is installed with a driving block 60 at one end close to the bearing 101, the inner side of the driving block 60 is provided with a magnetic ring 40 and an inner steel ring 30 from left to right, and a plurality of spherical steel columns 50 are provided between the inner steel ring 30 and the driving block 60, the inner steel ring 30 and the ratchet seat 70 are combined with threads or are integrated into one independent part, and one end of the core shaft 20 is located on the outer side of the ratchet seat 70 and a positioning cap 80 is installed.

[0023] Working principle of the present invention: When the ratchet seat 70 rotates clockwise, the spherical steel column 50 rolls to a certain position along the angle arc of the driving block 60 under the attraction of the magnetic ring 40, and the spherical steel column 50 is located at the center position of the limit groove 601, such as Figure 3 At this time, the spherical steel column 50 and the inner steel ring 30 are completely clamped, that is, Figure 4 The middle A position is in a biting state, and when the hub body 10 moves forward with force transmission, it drives the bicycle forward, and the spherical steel column 50 is in a suspended state under high-speed rotation; When the ratchet seat 70 rotates counterclockwise, the spherical steel column 50 rolls to a certain position along the angle arc of the driving block 60 under the attraction of the magnetic ring 40, and the spherical steel column 50 is located at the lower side of the limit groove 601, such as Figure 5 As shown; the spherical steel column 50 and the inner steel ring 30 are completely separated, that is Figure 6 There is a gap at the middle B position, and when the hub body 10 slides forward, the bicycle is idling, and there is no noise, zero resistance, and long inertia during idling.

[0024] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A rear hub forward driving device for a bicycle, comprising a hub body (10) and a bearing (101) mounted on the inner side of the hub body (10) by means of an interference fit, characterized in that: The inner side of the bearing (101) is provided with a core shaft (20) penetrating therethrough by means of an interference fit, and an inner steel ring (30) is installed on one end of the inner side of the hub body (10) close to the bearing (101), and a magnetic ring (40) and a driving block (60) are arranged on the inner side of the inner steel ring (30) in sequence from left to right, and a plurality of spherical steel columns (50) are arranged between the inner steel ring (30) and the driving block (60), a ratchet seat (70) is installed on one end of the driving block (60), and a positioning cap (80) is installed on one end of the core shaft (20) located on the outer side of the ratchet seat (70).

2. A rear hub forward driving device for a bicycle according to claim 1, characterized in that: The inner side wall of the hub body (10) is provided with a hub internal thread groove (102), the outer side of the inner steel ring (30) is provided with a steel ring external thread groove (301), and the hub body (10) and the inner steel ring (30) are meshedly connected via the hub internal thread groove (102) and the steel ring external thread groove (301).

3. The rear hub forward driving device for a bicycle according to claim 1, characterized in that: One end of the inner steel ring (30) is provided with four grooves (302) and the inner side of the inner steel ring (30) is provided with a plurality of straight grooves to enable more effective engagement and disengagement.

4. The rear hub forward driving device for a bicycle according to claim 1, characterized in that: An outer end of the driving block (60) is provided with a driving block external thread groove (602), and a plurality of limiting grooves (601) are provided at the other end of the outer end of the driving block (60). An inner side of the ratchet seat (70) is provided with a ratchet seat internal thread groove (701). The driving block (60) and the ratchet seat (70) are meshedly connected via the driving block external thread groove (602) and the ratchet seat internal thread groove (701), and the spherical steel column (50) is located on the inner side of the corresponding limiting groove (601).

5. The rear hub forward driving device for a bicycle according to claim 1, characterized in that: The outer side of the core shaft (20) is provided with a core shaft external thread groove (201), the inner side of the positioning cap (80) is provided with a positioning cap internal thread groove (801), and the core shaft (20) and the positioning cap (80) are meshedly connected via the core shaft external thread groove (201) and the positioning cap internal thread groove (801).

6. The rear hub forward driving device for a bicycle according to claim 1, characterized in that: The spherical steel column (50) is composed of a ball head and a cylinder, and a plurality of straight grooves and other non-cylindrical shapes are added outside the cylinder to cooperate with the inner steel ring (30) to engage and disengage, wherein the ball head and the magnetic ring (40) are in point contact, and the cylinder is located on the inner side of the limiting groove (601).

7. The rear hub forward driving device for a bicycle according to claim 1, characterized in that: The magnetic ring (40) is made of high temperature resistant permanent magnet.

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