Integrated hub structure

Abstract

The utility model provides an integrated hub structure which comprises a rim and a spoke plate, the spoke plate is connected to the inner side of the rim, an inner ring connected with a motor rotating shaft is arranged in the center of the spoke plate, the rim and the spoke plate are integrally formed, the rim is used for assembling and bearing a tire, and the rim extends from one side of the spoke plate to the other side of the spoke plate in the axial direction. A first rim is arranged on the edge of one side of the rim in the axial direction, a second rim is arranged on the edge of the other side of the rim in the axial direction, the first rim and the second rim extend outwards in the radial direction, and a drum brake groove is formed in the inner surface of the side, where the first rim is located, of the rim. According to the integrated hub structure, the large-diameter drum brake groove is formed in the integrated hub, braking force is increased, integrated connection is adopted, the structure is stable, and safety performance is improved.

Description

Technical Field

[0001] This application belongs to the field of electric bicycle accessories, specifically relating to an integrated wheel hub structure. Background Technology

[0002] A wheel is a rigid device that holds the inner edge of the tire in place, supports the tire, and shares the load with it. Wheels and tires are only functional when used together; they cannot be separated. Together, they support the entire electric bicycle, mitigate impacts from the road surface, generate driving force, braking force, and lateral force, produce self-centering torque, and improve obstacle clearance and overall maneuverability. A wheel primarily consists of a hub, spokes, and other structural components. Drum brakes are a common braking method for electric bicycles. The drum brake system uses a brake lever, brake cable, and brake pads to achieve braking. When the rider pulls the brake lever, the force is transmitted to the brake pads through the brake cable or brake lever. The brake pads, pulled by the brake cable, expand outwards and rub against the inner surface of the drum brake groove as the wheel rotates, thus inhibiting wheel rotation and achieving braking. Most existing electric bicycles use drum brake grooves with inner diameters of 80mm or 110mm. These grooves are located in the center of the wheel and connected to the hub by ribs. The small inner diameter of these grooves results in a small contact area with the brake pads, leading to low braking force and poor braking performance. Furthermore, the spoke connection between the hub and rim reduces wheel weight, but it is prone to loosening or damage and requires timely replacement or adjustment. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an integrated wheel hub structure. By setting a large-diameter drum brake groove in the integrated wheel hub, the braking force is increased. The integrated connection ensures structural stability and improves safety performance.

[0004] The technical solution adopted in this utility model is as follows:

[0005] An integrated wheel hub structure includes a rim and spokes. The spokes are connected to the inner side of the rim. The center of the spokes has an inner ring connected to the motor shaft. The rim and spokes are integrally formed. The rim is used to assemble and support the tire. The rim extends axially from one side of the spokes to the other side of the spokes. The rim has a first rim edge on one side of the rim along the axial direction and a second rim edge on the other side of the rim along the axial direction. Both the first rim edge and the second rim edge extend radially outward. A drum brake groove is formed on the inner surface of the rim on the side where the first rim edge is located.

[0006] Furthermore, the spokes are bowl-shaped integral plates with a certain thickness. The spokes protrude towards the second rim, supporting the rim and transmitting pressure from the electric bicycle. At the same time, they can disperse the heat generated during braking and improve braking efficiency.

[0007] Furthermore, the drum brake groove is set along the circumference of the wheel rim. The drum brake groove is formed by the inner annular surface of the wheel rim and the outer annular surface of the spokes. The inner annular surface of the wheel rim surrounds the outer surface of the brake pads. During braking, the outer surface of the brake pads rubs against the inner annular surface of the wheel rim, inhibiting the rotation of the wheel hub. Since the drum brake groove is set on the inner surface of the wheel rim, the diameter of the drum brake groove is increased, which increases the contact area between the brake pads and the wheel hub, improves the braking force, and enhances the braking performance. The drum brake groove and the wheel hub are an integral structure, which improves the overall strength of the wheel hub.

[0008] Furthermore, the rim thickness on one side of the spokes is greater than that on the other side of the spokes. The thicker rim is provided with a drum brake groove. Since the brake pads rub against the rim frequently, the thicker rim helps to improve the structural strength of the rim and resist wear caused by brake pad friction.

[0009] Furthermore, a first rim groove for mounting the tire is formed on the inner side of the first rim rim of the wheel hub, and the first rim groove is located at the transition position between the outer wall surface of the wheel rim and the first rim rim.

[0010] Furthermore, a second rim groove for mounting the tire is formed on the inner side of the second rim of the wheel hub. The second rim groove is located at the transition position between the outer wall surface of the wheel rim and the second rim. After the tire is mounted on the wheel hub, it is positioned and sealed by the first rim and the second rim.

[0011] Furthermore, the outer wall surface of the wheel rim is provided with a recessed tire cavity groove, which is located between the first rim groove and the second rim groove and extends along the circumference of the wheel rim. The transition positions between the tire cavity groove and the first rim groove, and between the tire cavity groove and the second rim groove, are provided with protrusions. The tire used in conjunction with the wheel rim is an inflatable tire, and a tire cavity for inflating air is formed between the tire and the wheel rim. Air is forced into the tire cavity, and the tire cavity groove is used to increase the volume of the tire cavity and improve the comfort of the wheel.

[0012] Furthermore, the spokes are provided with a plurality of first reinforcing ribs in a radiating pattern. The first reinforcing ribs are located on one side of the spokes, with one end of the first reinforcing rib connected to the wheel rim and the other end converging and connecting to the inner ring. The first reinforcing ribs are used to enhance the overall strength of the wheel hub and improve its compressive strength.

[0013] Furthermore, multiple second reinforcing ribs connect the spokes and the inner ring. The second reinforcing ribs are arranged intersectingly and alternately with the first reinforcing ribs. The second reinforcing ribs are used to support the inner ring and improve the stability of the connection between the inner ring and the spokes.

[0014] Furthermore, the wheel rim, spokes, inner ring, first reinforcing rib, and second reinforcing rib are integrally cast.

[0015] Beneficial effects

[0016] This utility model provides an integrated wheel hub structure. By incorporating a web, it disperses heat generated during braking, supports the wheel rim, and transmits pressure from the electric bicycle. The drum brake groove on the inner surface of the wheel rim has a larger diameter, increasing the contact area between the brake pads and the wheel hub, thereby improving braking force and performance. The drum brake groove and wheel hub are an integrated structure, enhancing the overall strength of the wheel hub and increasing its torque capacity. The thickened wheel rim improves its structural strength and resists wear caused by brake pad friction. The first reinforcing rib enhances the overall strength of the wheel hub and improves its compressive strength. The second reinforcing rib improves the stability of the connection between the inner ring and the spokes. Attached Figure Description

[0017] Figure 1 This is a first-view schematic diagram of an integrated wheel hub structure according to the present invention.

[0018] Figure 2 This is a second-view schematic diagram of an integrated wheel hub structure according to the present invention.

[0019] Figure 3 This is a front view of an integrated wheel hub structure according to the present invention.

[0020] Figure 4 for Figure 3 A cross-sectional view along the AA direction.

[0021] Figure 5 for Figure 3 A sectional stereoscopic view along the AA direction.

[0022] Figure label:

[0023] 1-Rim, 2-Spoke, 3-Inner rim, 4-First rim, 5-Second rim, 6-Drum brake groove, 8-First rim groove, 9-Second rim groove, 10-Tire cavity groove, 11-First reinforcing rib, 12-Second reinforcing rib, 13-Protrusion. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of 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.

[0027] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] like Figure 1-5 As shown, an integrated wheel hub structure includes a rim 1 and spokes 2. The spokes 2 are connected to the inner side of the rim 1. The center of the spokes 2 is provided with an inner ring 3 connected to the motor shaft. The rim 1 and spokes 2 are integrally formed. The rim 1 is used to assemble and support the tire. The rim 1 extends axially from one side of the spokes 2 to the other side of the spokes 2. The rim 1 has a first rim 4 on one side edge along the axial direction and a second rim 5 on the other side edge along the axial direction. Both the first rim 4 and the second rim 5 extend radially outward. The inner surface of the rim 1 on the side where the first rim 4 is located forms a drum brake groove 6.

[0029] The spoke 2 is a bowl-shaped integral plate with a certain thickness. The spoke 2 protrudes towards the second rim. The spoke 2 supports the rim 1 and transmits the pressure from the electric bicycle. At the same time, it can disperse the heat generated during braking and improve braking efficiency.

[0030] The drum brake groove 6 is arranged along the circumference of the wheel rim 1. The drum brake groove 6 is formed by the inner annular surface of the wheel rim 1 and the outer annular surface of the spoke 2. The inner annular surface of the wheel rim 1 surrounds the outer surface of the brake shoe. During braking, the outer surface of the brake shoe rubs against the inner annular surface of the wheel rim 1, inhibiting the rotation of the wheel hub. Since the drum brake groove 6 is located on the inner surface of the wheel rim 1, the diameter of the drum brake groove 6 is increased, for example, it can be 186mm, which increases the contact area between the brake shoe and the wheel hub, improves the braking force, and enhances the braking performance. The drum brake groove 6 and the wheel hub are an integral structure, which improves the overall structural strength of the wheel hub and increases the torque that the wheel hub can withstand, making smaller-sized wheel hubs suitable for high-performance vehicles.

[0031] The thickness of the rim 1 on one side of the spoke 2 is greater than the thickness of the rim 1 on the other side of the spoke 2. The thicker rim 1 is provided with a drum brake groove 6. Since the brake pads and the rim 1 rub against each other frequently, the thicker rim 1 is beneficial to improving the structural strength of the rim 1 and resisting the wear caused by the friction of the brake pads.

[0032] The wheel hub forms a first rim groove 8 for mounting the tire on the inner side of the first rim 4. The first rim groove 8 is located at the transition position between the outer wall of the wheel rim 1 and the first rim 4.

[0033] The wheel hub forms a second wheel flange groove 9 for mounting the tire on the inner side of the second wheel flange 5. The second wheel flange groove 9 is located at the transition position between the outer wall of the wheel rim 1 and the second wheel flange 5. After the tire is mounted on the wheel hub, it is positioned and sealed by the first wheel flange 4 and the second wheel flange 5.

[0034] The outer wall of the rim 1 is provided with a recessed tire cavity groove 10. The tire cavity groove 10 is located between the first rim groove 8 and the second rim groove 9 and extends along the circumference of the rim 1. The transition position between the tire cavity groove 10 and the first rim groove 8 and the transition position between the tire cavity groove 10 and the second rim groove 9 are provided with protrusions 13. The tire used in conjunction with the rim is an inflatable tire. A tire cavity for inflating air is formed between the tire and the rim 1. Air is forced into the tire cavity. The tire cavity groove 10 is used to increase the volume of the tire cavity and improve the comfort of the wheel.

[0035] The spoke 2 is provided with a plurality of first reinforcing ribs 11 in a radiating pattern. The first reinforcing ribs 11 are located on one side of the spoke 2. One end of the first reinforcing rib 11 is connected to the wheel rim 1, and the other end is connected to the inner ring 3. The first reinforcing ribs 11 are used to enhance the overall strength of the wheel hub and improve its compressive strength.

[0036] Multiple second reinforcing ribs 12 are connected between the spoke 2 and the inner ring 3. The second reinforcing ribs 12 are arranged intersectingly and at intervals with the first reinforcing ribs 11. The second reinforcing ribs 12 are used to support the inner ring 3 and improve the stability of the connection between the inner ring 3 and the spoke 2.

[0037] The wheel rim 1, spokes 2, inner ring 3, first reinforcing rib 11, and second reinforcing rib 12 are integrally cast.

[0038] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. An integrated hub structure, characterized by comprising: It includes a wheel rim (1) and a spoke plate (2), the spoke plate (2) is connected to the inner side of the wheel rim (1), the center of the spoke plate (2) is provided with an inner ring (3) connected with the motor rotating shaft, the wheel rim (1) and the spoke plate (2) are integrally formed, the wheel rim (1) is used for assembling and supporting the tire, the wheel rim (1) extends along the axial direction from one side of the spoke plate (2) to the other side of the spoke plate (2), the first rim (4) is arranged on one side edge of the wheel rim (1) along the axial direction, the second rim (5) is arranged on the other side edge of the wheel rim (1) along the axial direction, the first rim (4) and the second rim (5) extend outward along the radial direction, and the inner surface of the wheel rim (1) on the side where the first rim (4) is located forms a drum brake groove (6).

2. The one-piece hub structure of claim 1, wherein The spoke plate (2) is a bowl-shaped integral plate, the spoke plate (2) has a certain thickness, and the spoke plate (2) protrudes towards the second rim.

3. The one-piece hub structure of claim 2, wherein The drum brake groove (6) is arranged along the circumferential direction of the wheel rim (1), and is formed by the inner annular surface of the wheel rim (1) and the outer annular surface of the spoke plate (2), and the inner annular surface of the wheel rim (1) surrounds the outer surface of the brake shoe.

4. The one-piece wheel structure according to claim 2 or 3, characterized in that The thickness of the wheel rim (1) on one side of the spoke plate (2) is greater than the thickness of the wheel rim (1) on the other side of the spoke plate (2), and the drum brake groove (6) is arranged on the thicker wheel rim (1).

5. The one-piece hub structure of claim 1 wherein, The hub forms a first rim groove (8) for assembling the tire on the inner side of the first rim (4), and the first rim groove (8) is located at the transition position between the outer wall surface of the wheel rim (1) and the first rim (4).

6. The one-piece hub structure of claim 5, wherein, The hub forms a second rim groove (9) for assembling the tire on the inner side of the second rim (5), and the second rim groove (9) is located at the transition position between the outer wall surface of the wheel rim (1) and the second rim (5).

7. The one-piece hub structure of claim 6, wherein The outer wall surface of the wheel rim (1) is provided with a sunken tire cavity groove (10), the tire cavity groove (10) is arranged between the first rim groove (8) and the second rim groove (9) and extends along the circumferential direction of the wheel rim (1), and the transition position between the tire cavity groove (10) and the first rim groove (8) and the transition position between the tire cavity groove (10) and the second rim groove (9) are provided with protrusions (13).

8. The one-piece wheel structure of claim 1 or 2, wherein A plurality of first reinforcing ribs (11) are arranged on the spoke plate (2) in a diverging manner, the first reinforcing ribs (11) are arranged on one side of the spoke plate (2), one end of the first reinforcing ribs (11) is connected with the wheel rim (1), and the other end is connected with the inner ring (3).

9. The one-piece hub structure of claim 8, wherein, A plurality of second reinforcing ribs (12) are connected between the spoke plate (2) and the inner ring (3), and the second reinforcing ribs (12) are arranged in a staggered manner with the first reinforcing ribs (11).

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