Spokeless hollow hub wheel

Abstract

A spokeless hollow hub wheel, characterized in that it comprises a front wheelset assembly and a rear wheelset assembly, wherein the front wheelset assembly and the rear wheelset assembly both comprise a tire, a rim assembly and a hub assembly; wherein the rim assembly comprises a rim, with the tire mounted on an outer edge of the rim; wherein the hub assembly comprises a left hub assembly and a right hub assembly, the left hub assembly comprising a left hub and a left bearing that are mated with each other, while the right hub assembly comprises a right hub and a right bearing that are mated with each other, the left hub and the right hub having a spokeless, hollow, annular structure, the left hub and the right hub being cooperatively connected to each other and cooperatively secured to an inner edge of the rim by the left bearing and the right bearing, respectively; where, assuming the left bearing and the right bearing, the left hub and the right hub serve as a fastening part of the wheel, and the tire and the rim assembly serve as a rotating part of the wheel.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of electric bicycles, in particular to a spokeless hollow hub wheel and an electric bicycle with spokeless hollow hub wheels. STATE OF THE ART

[0002] Conventional electric bicycles typically consist of a frame, a front wheel, a rear wheel, and a large flywheel with pedals, etc. The front wheel consists of a hub and tire with hubs and spokes, while the rear wheel consists of a hub and tire with hubs, spokes, and a toothed pulley. The rim is connected to the hub via the spokes to form a wheelset, and the large flywheel is connected to the toothed pulley on the center shaft of the rear wheel via the chain to drive the electric bicycle.

[0003] At present, although there are research designs for hollow hubs in existing technology, and there are also electric bicycles with hollow hubs, the existing hollow hubs and electric bicycles with hollow hubs are designed only for the sake of the cool appearance of the hollow hubs, and the design principle is simple and crude, and there are many problems and unreasonableness. Regardless of whether two sets of bearings or one set of bearings are used, the friction contact area between the bearings and the wheel set is relatively large, and the probability of sliding friction, the outer wall of the bearings and the inner wall of the wheel set will wear faster to generate noise, and in the case of impact, linear indentations are likely to be caused, which affects the degree of smoothness of rotation.The weight of the bicycle body is mainly concentrated on the axle of the bearing, so the contact between the bearing and the wheelset is only a point, the axle bearing force is not balanced, and the long time of work will easily lead to the eccentricity of the bearing, resulting in the jumping of the wheelset, which increases wear and reduces the safety of riding. CONTENT OF THE PRESENT UTILITY MODEL

[0004] The purpose of this utility model is to provide a spokeless hollow hub wheel.

[0005] A spokeless hollow hub wheel comprising a front wheelset assembly and a rear wheelset assembly, the front wheelset assembly and the rear wheelset assembly both comprising a tire, a rim assembly, and a hub assembly, the rim assembly comprising a rim, the hub assembly comprising hubs, the tire being mounted on an outer edge of the rim, the hub assembly comprising a left hub assembly and a right hub assembly, the left hub assembly comprising a left hub and a left bearing mated with each other, while the right hub assembly comprises a right hub and a right bearing mated with each other, the left hub and the right hub having a spokeless hollow annular structure, the left hub and the right hub being cooperatively connected to each other and cooperatively supported by the left bearing and the right hub, respectively.the right bearing is fixed to the inner edge of the rim, assuming the left bearing and the right bearing, the left hub and the right hub serve as a fixing part of the wheel, and the tire and the rim assembly serve as a rotating part of the wheel.

[0006] The present utility model has the following advantageous effects: The present utility model adopts a spokeless hollow hub with a ring-shaped structure. The hub serves as a fastening part and the rim and tire together serve as a rotating part. The hub is connected to the rim by bearings, the friction coefficient is lower, and a high rotational speed and high load capacity are achieved. The present utility model can lower the center of gravity of the entire bicycle, reduce unsprung mass, reduce axial and radial deformation of the wheelset and the risk of runout, reduce the effects of crosswinds, improve aerodynamic maneuverability, reduce energy loss, improve rideability and drivability, and prevent injury or damage to the bicycle from people or objects caught in the spokes.The structure of the components is more intuitive, the mass production cost is low, the assembly efficiency is high, and it is convenient to overhaul. SHORT DESCRIPTION OF THE DRAWING Fig. 1 shows a schematic diagram of the main view structure of a front wheelset assembly; Fig. 2 shows an exploded view of a three-stage disassembly of the front wheelset assembly; Fig. 3 shows a schematic diagram of the main view structure of a rear wheelset assembly; Fig. 4 shows an exploded view of a one-step disassembly of the rear wheelset assembly; Fig. 5 shows an exploded view of a three-stage disassembly of the rear wheelset assembly; Fig. 6 shows a schematic diagram of the three-dimensional structure of an electric bicycle; Fig. 7 shows a disassembled exploded view of the three-dimensional structure of an electric bicycle when it is not equipped with a wheel set; Fig. 8 shows a schematic diagram of the sectional structure of the center-mounted power module of the present utility model; Fig. Figure 9 shows a schematic representation of the three-dimensional structure of a centrally mounted power module in combination with the rear-mounted motor drive assembly. DETAILED DESCRIPTION

[0007] In order to enable the person skilled in the art to better understand the technical solution of the present utility model, a detailed description of the present utility model follows in conjunction with the attached drawings and concrete embodiments.

[0008] As in Fig. 1 to 5, the present utility model provides a spokeless hollow hub wheel comprising a front wheelset assembly 12 and a rear wheelset assembly 32, wherein the front wheelset assembly 12 and the rear wheelset assembly 32 both comprise a tire, a rim assembly, and a hub assembly, wherein the rim assembly comprises a rim with the tire mounted on an outer edge of the rim, wherein the hub assembly comprises a left hub assembly and a right hub assembly, wherein the left hub assembly comprises a left hub and a left bearing which are mated with each other, while the right hub assembly comprises a right hub and a right bearing which are mated with each other, wherein the left hub and the right hub have a spokeless, hollow, annular structure, wherein the left hub and the right hub are cooperatively connected to each other and cooperatively supported by the left bearing and the right hub, respectively.the right bearing is fixed to the inner edge of the rim, assuming the left bearing and the right bearing, the left hub and the right hub serve as a fixing part of the wheel, and the tire and the rim assembly serve as a rotating part of the wheel.

[0009] In this embodiment, the present utility model adopts a spokeless hollow hub with a ring-shaped structure. The hub serves as a fastening part and the rim and tire together serve as a rotating part. The hub is connected to the rim through bearings, the friction coefficient is lower, and a high rotational speed and high load capacity are achieved. The present utility model can lower the center of gravity of the entire bicycle, reduce unsprung mass, reduce axial and radial deformation of the wheelset and the risk of runout, reduce the effects of crosswinds, improve aerodynamic maneuverability, reduce energy loss, improve rideability and drivability, and prevent injury or damage to the bicycle from people or objects caught in the spokes.The structure of the components is more intuitive, the mass production cost is low, the assembly efficiency is high, and it is convenient to overhaul.

[0010] Furthermore, the hub is connected to the bicycle body as a fixing part (stationary part) of the wheel, and the rim and the tire together serve as a rotating part of the wheel, and the fixing part and the rotating part are cooperatively connected to each other by a bearing, the bearing being provided between the hub and the rim.

[0011] In particular, the bearing is an angular contact ball bearing comprising a combination of an outer ring, an inner ring, a steel ball, and a retaining cage, wherein the inner ring of the angular contact ball bearing serves as a part of the above fixing part, and the outer ring, the steel ball, and the retaining cage of the angular contact ball bearing serve as a part of the above rotating part.

[0012] In the above embodiment, preferably, the rim assembly further comprises brake pads, wherein the brake pads are attached to the inner edge of the rim, and the rim assembly further comprises brake calipers, wherein the brake calipers are installed on either the left hub or the right hub and cooperate with the brake pads. Preferably, the brake pads are attached to the center of the inner edge of the rim, and the caliper is located at the edge of the brake pads, and the caliper effects braking by clamping the brake pads. Since the brake pad is attached to the inner edge of the rim, the braking effect on the wheel during braking can be improved, and the braking distance can be shortened with the same braking force.

[0013] In the above embodiment, preferably, the hub assembly further comprises a position adjusting block, wherein the position adjusting block and the brake caliper are installed together on the left hub or the right hub, and wherein the position adjusting block is cooperatively connected to the brake caliper, wherein the position adjusting block adjusts the braking degree of the brake caliper.

[0014] In the above embodiment, preferably, the rim has a hollow, annular structure, the rim is provided with a rim flange on both sides of the outer edge, the tire is fixed to the rim by the rim flange, valve holes are passed through the annular structure of the rim, which are adapted to the tire, the tires can be inflated through the valve holes.

[0015] In the above embodiment, preferably, the rim is provided with a fastening reinforcement at the inner edge of the annular structure, wherein the fastening reinforcement is welded, riveted or integrally formed in the center of the inner edge of the rim.

[0016] In the above embodiment, preferably, the left hub assembly further comprises a left seal ring, while the right hub assembly further comprises a right seal ring, wherein it is sealed between the left hub and the rim by a matched attachment location of the left bearing of the left seal ring, while it is sealed between the right hub and the rim by a matched attachment location of the right bearing of the right seal ring.

[0017] In the above embodiment, preferably, the left hub assembly further comprises a left light band, while the right hub assembly further comprises a right light band, wherein the left light band and the right light band are arranged on an outer side of the left hub and the right hub, respectively.

[0018] Specifically, the spokeless hollow hub wheel includes a front wheel and a rear wheel. In this embodiment, the front wheel serves as a trailing wheel and the rear wheel serves as a driving wheel. The front wheel assembly includes a structure according to the above embodiment. In the rear wheel assembly, the rim assembly based on the structure according to the above embodiment further includes an internal gear ring. The internal gear ring is fixed to the inner edge of the rim. The left hub and the right hub are each provided with opening grooves on the annular structure. The left hub and the right hub are exposed to the internal gear ring through the opening groove after being fixedly connected, which allows a driving structure to drive the internal gear ring to achieve rotation of the driving wheel.

[0019] In the spokeless hollow hub wheel disclosed in the above embodiment, the front wheelset assembly 12 includes a tire 121, a rim assembly 122, and a hub assembly 123. The tire 121 includes an outer tire 1211 and an inner tire 1212; the rim assembly 122 includes a rim 1221, with the tire 121 being fitted onto an outer edge of the rim 1221; and the hub assembly 123 includes a left hub assembly 1232 and a right hub assembly 1231, with the tire 121 and the rim assembly 122 acting as a rotating part of the wheel.

[0020] The rear wheelset assembly 32 includes a tire 321, a rim assembly 322, and a hub assembly 323. The tire 321 includes an outer tire 3211 and an inner tire 3212; the rim assembly 322 includes a rim 3221, with the tire 321 being mounted on an outer edge of the rim 3221; and the hub assembly 323 includes a left hub assembly 3231 and a right hub assembly 3232, with the tire 321 and the rim assembly 322 acting as a rotating part of the wheel.

[0021] As in Fig.6 to 9, the present utility model provides a hybrid drive system comprising a front wheel assembly 1, a main frame assembly 2, and a rear wheel assembly 3, wherein the front wheel assembly 1 includes a steering assembly 11 and a front wheelset assembly 12 according to any one of the disclosures in the above embodiment, wherein the steering assembly 11 is fixed to the front end of the main frame assembly 2, wherein the front wheelset assembly 12 is cooperatively installed on the steering assembly 11, and the steering assembly 11 drives the front wheelset assembly 12 to rotate synchronously left and right relative to the main frame assembly 2, wherein the rear frame transmission assembly 31 includes a rear frame 311, a transmission assembly 314, and a hybrid drive system, wherein the rear frame is cooperatively installed on the rear side of the main frame assembly 2,wherein the hybrid drive system comprises a centrally mounted power module 312 and a rear-mounted power module 313, wherein the mounted power module 312 and the rear-mounted power module 313 are installed on opposite front and rear sides of the rear frame 311, respectively, wherein power is transmitted between the centrally mounted power module 312 and the rear-mounted power module 313 by the transmission mount 314, wherein the centrally mounted power module 312 includes a centrally mounted module housing 3121, a centrally mounted drive mount 3122, and a foot pedal and crank 3123, wherein the centrally mounted drive mount 3122 is installed coaxially within the centrally mounted module housing 3121, wherein the foot pedal and crank 3123 are coaxially connected to the centrally mounted drive mount 3122 by an end cap of the centrally mounted module housing 3121,wherein the center-mounted drive assembly 3122 uses a human drive mode or a human-electric hybrid drive mode, wherein the center-mounted drive assembly 3122 of the human drive mode is driven by applying human power to the foot pedal as a power input, while the center-mounted drive assembly 3122 of the human-electric hybrid drive mode is driven by applying human power to the foot pedal as a power input, or by a center-mounted motor drive assembly installed in the center-mounted module housing 3121 providing a power input, wherein the rear-mounted power module 313 comprises a rear-mounted module housing 3131 and a rear-mounted drive assembly, wherein the rear-mounted drive assembly is installed coaxially within the rear-mounted module housing 3131,wherein a centrally mounted power output end of the centrally mounted drive assembly 3122 is transmittively connected to the rear-mounted drive assembly through the transmission assembly 314, wherein the rear-mounted drive assembly comprises a rear-mounted motor drive assembly or a transmission assembly, wherein the rear-mounted motor drive assembly comprises an output state and a drive state, wherein in the output state the rear-mounted motor drive assembly passively rotates with the power of the centrally mounted drive assembly 3122, while in the drive state the rear-mounted motor drive assembly actively rotates, wherein the transmission assembly adjusts the gear ratio to the power of the centrally mounted drive assembly, wherein the rear-mounted motor drive assembly or the transmission assembly is in an inner tangential circular relationship with the rear wheel set assembly 32,wherein an output power is transmittively connected to the rear wheelset assembly 32 via a rear-mounted power output end to drive the rear wheelset assembly 32 to achieve rotation.,

[0022] In this embodiment, the mid-mounted power module uses a human-electric hybrid drive method consisting of human drive and motor drive. Combined with the installation of a rear-mounted motor drive assembly or a transmission on the drive wheel, it provides a variety of drive combinations for different application scenarios. Furthermore, the mid-mounted motor drive assembly and the transmission assembly through human drive use a coaxial installation method, which significantly reduces the overall volume of the drive device, has a stable structure, high transmission efficiency, and good module versatility, improves the riding experience of the entire electric bicycle, provides a completely new way of thinking for the design and development of the electric bicycle, and effectively solves the problems of the existing technology on the market.

[0023] At the same time, the electric bicycle uses a spokeless, hollow, ring-shaped hub structure, which minimizes lateral wind resistance to prevent sideways falls, reduces the impact force of lateral water flow on the wheel to prevent sideways falls, and reduces injuries to small animals crossing the road and to people. At the same time, lowering the center of gravity can avoid the risk of the bicycle tipping over while increasing the power of instantaneous acceleration.

[0024] In the spokeless hollow hub wheel disclosed in the above embodiment, the center-mounted power module 312 is driven by a hybrid drive system consisting of human propulsion and motor propulsion, and the rear-mounted power module 313 provides motor propulsion or gear transmission. Thus, the combination of the center-mounted drive and the rear drive can enable a variety of drive combinations for different application scenarios.

[0025] Here, the human-powered foot pedal and crank 3123 and the centrally mounted motor drive assembly form a coaxial installation structure. The coaxially installed motor can be driven in synchronous rotation during human power generation to achieve power generation and function as a power generation unit to charge the battery pack or supply power to other loads. When the centrally mounted power module 312 adopts a structure driven solely by human power, the rear-mounted power module 313 should adopt a rear-mounted motor drive assembly instead of a gear assembly to realize the electric drive of the electric bicycle.When the center-mounted power module 312 adopts a motor drive structure, the center-mounted motor drive assembly outputs power to the rear-mounted power module 313 through the center-mounted power output end coaxial with the human drive, and the rear-mounted power module 313 transmits the power to the drive wheel to realize the drive of the bicycle.

[0026] In the spokeless hollow hub wheel disclosed in the above embodiment, in the rear-mounted power module 313, the rear-mounted drive assembly, when it is a rear-mounted motor drive assembly, is capable of forming a combined drive mode with the center-mounted power module 312, and the rear-mounted drive assembly, when it is a geared drive assembly, is capable of providing a preset variable speed setting for the power of the center-mounted power module 312, so that it can meet various driving scenarios.

[0027] Specifically, when the rear-mounted motor drive assembly is in a driving state, the rear-mounted motor drive assembly is coupled to the mid-mounted drive assembly 3122, and only the rear-mounted motor drive assembly supplies power to the drive wheel of the electric bicycle. It is also possible for the mid-mounted drive assembly 3122 and the rear-mounted motor drive assembly to jointly supply power to the drive wheel of the electric bicycle to increase the riding performance of the electric bicycle.

[0028] In particular, the steering assembly comprises a steering assembly and a front fork assembly, wherein the steering assembly comprises a handgrip and a handlebar, and the front fork assembly comprises a front fork and a shock absorber assembly, wherein the handlebar is fixedly installed at the front end of the main frame assembly, wherein the handgrip is transversely attached to the handlebar, wherein the front fork is fixedly installed at the lower end of the handlebar and the shock absorber assembly is provided on the front fork, wherein the hub of the front wheelset assembly is occlusally attached to the front fork, wherein the tire and rim of the front wheelset assembly rotate relative to the hub.

[0029] Specifically, the main frame assembly includes a frame assembly, a seat lift assembly, and a bracket assembly. The seat lift assembly is installed on top of the frame assembly, and the seat is raised and lowered by telescoping. The bracket assembly is installed on the bottom of the side part of the frame assembly and serves as a support bracket for the electric bicycle. The frame assembly is provided with a rear frame installation hole, a charging module, and a frame compartment module. The rear frame transmission assembly is installed in the rear frame installation hole. The frame compartment module is used for mounting a battery module and a control module, and the charging module is a charging interface for the battery module.

[0030] In particular, the transmission assembly includes a chain transmission assembly, a belt transmission assembly, a gear transmission assembly, and a shaft transmission assembly.

[0031] The above statements represent only a preferred embodiment of the present utility model and are not intended to limit the present utility model, which may be subject to various modifications and alterations apparent to those skilled in the art. All modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model fall within the scope of protection of the present utility model.

Claims

[1] Spokeless hollow hub wheel, characterized by that it comprises a front wheelset assembly and a rear wheelset assembly, wherein the front wheelset assembly and the rear wheelset assembly both comprise a tire, a rim assembly and a hub assembly; wherein the rim assembly comprises a rim, with the tire mounted on an outer edge of the rim; wherein the hub assembly comprises a left hub assembly and a right hub assembly, the left hub assembly comprising a left hub and a left bearing that are mated with each other, while the right hub assembly comprises a right hub and a right bearing that are mated with each other, the left hub and the right hub having a spokeless, hollow, annular structure, the left hub and the right hub being cooperatively connected to each other and cooperatively secured to an inner edge of the rim by the left bearing and the right bearing, respectively; where, assuming the left bearing and the right bearing, the left hub and the right hub serve as a fastening part of the wheel, and the tire and the rim assembly serve as a rotating part of the wheel. [2] Spokeless hollow hub wheel according to claim 1, characterized by that the rim assembly further comprises brake pads, wherein the brake pads are attached to the inner edge of the rim, and that the rim assembly further comprises brake calipers, wherein the brake calipers are installed either on the left hub or the right hub and in cooperation with the brake pads. [3] Spokeless hollow hub wheel according to claim 2, characterized by that the rim has a hollow, annular structure, that the rim is provided with a rim flange on both sides of the outer edge, wherein the tire is attached to the rim by the rim flange, wherein valve holes are passed through the annular structure of the rim and are adapted to the tire. [4] Spokeless hollow hub wheel according to claim 3, characterized by that the rim is provided with a fastening reinforcement at the inner edge of the annular structure, the fastening reinforcement being welded, riveted or formed in one piece in the centre of the inner edge of the rim. [5] Spokeless hollow hub wheel according to claim 1, characterized by that the left hub assembly further comprises a left sealing ring, while the right hub assembly further comprises a right sealing ring, wherein it is sealed between the left hub and the rim by an adapted attachment location of the left bearing of the left sealing ring, while it is sealed between the right hub and the rim by an adapted attachment location of the right bearing of the right sealing ring. [6] Spokeless hollow hub wheel according to claim 5, characterized bythat the left hub assembly further comprises a left light band, while the right hub assembly further comprises a right light band, wherein the left light band and the right light band are arranged on an outer side of the left hub and the right hub, respectively. [7] Spokeless hollow hub wheel according to claim 2, characterized by in that the hub assembly further comprises a position adjustment block, wherein the position adjustment block and the brake caliper are installed together on the left hub or the right hub, and wherein the position adjustment block is cooperatively connected to the brake caliper, wherein the position adjustment block adjusts the braking degree of the brake caliper. [8] Spokeless hollow hub wheel according to claim 1, characterized byin that in the rear wheelset assembly, the rim assembly further comprises an internal gear ring, wherein the internal gear ring is fixed to the inner edge of the rim, wherein the left hub and the right hub are each provided with opening grooves on the annular structure, and wherein the left wheel hub and the right wheel hub are exposed to the internal gear ring through the opening groove after being fixedly connected, which enables a drive structure to drive the internal gear ring to achieve rotation of the drive wheel.

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