A double-sided disc brake electric vehicle hub

Abstract

The application discloses a double-sided disc brake electric vehicle wheel hub and belongs to the technical field of electric bicycles. The wheel hub comprises a wheel hub body, and disc plates are mounted on both sides of the wheel hub body respectively. Each disc plate is provided with a matched caliper, and the caliper is connected to a controller and is controlled by the controller to brake synchronously. The application effectively eliminates the twist and imbalance caused by single-sided braking through double-sided synchronous braking, greatly improves the braking stability, safety and braking efficiency, and avoids the problem of thermal decay. Meanwhile, the wheel hub body is provided with detachable side disc covers on both sides. By replacing the side disc cover modules with different functional parts, the same side of the wheel hub can selectively mount disc plates or flywheels, thereby perfectly solving the contradiction between the redundancy of the pedal function and the high-level braking demand in the traditional design, and realizing the flexibility and universality of the functional configuration.

Description

Technical Field

[0001] This utility model belongs to the field of electric vehicle technology, and in particular relates to an electric vehicle wheel hub with dual-sided disc brakes. Background Technology

[0002] Electric bicycles, as a green and convenient mode of transportation, have become widely popular. Their mainstream structure typically includes a wheel driven by a hub motor, while retaining a human-powered drive system consisting of pedals, a chain, and a freewheel for assisting in travel when power is insufficient. In this traditional design, a freewheel is mounted on one side of the hub motor (usually the non-motor output side) via a threaded structure, while the other side generally has a single disc brake system—a disc and a corresponding caliper—to meet basic braking needs.

[0003] However, the aforementioned existing technical solutions have significant functional defects and safety hazards. First, because space and structure must be reserved on one side of the wheel hub for installing a flywheel, a single disc brake system can only be installed on the other side. This single-sided braking method has inherent shortcomings: the huge torque generated during braking is entirely borne by one side, which can easily cause the wheel hub assembly and even the entire front fork or rear swingarm to twist, affecting the straight-line braking stability of the vehicle and posing a safety hazard. At the same time, the braking force and heat capacity of the single disc brake system are limited, and under conditions such as long downhill or frequent braking, it is prone to a significant decrease in braking performance due to heat fade. Second, with the improvement of battery technology and motor efficiency, the range of electric bicycles has increased significantly, and the frequency of use of pedal drive function has decreased dramatically, even becoming a redundant configuration for most users. However, sacrificing a better dual-sided braking solution to retain this function is undoubtedly a design compromise. Ultimately, existing technology places users in a dilemma: either retain the rarely used pedal function and accept the mediocre braking performance and potential risks of a single disc brake, or completely abandon the pedal function but still cannot easily upgrade to a safer dual-disc brake system. This contradiction has become a technological bottleneck restricting further optimization of the safety and functionality of electric bicycles, especially mid-to-high-end models. Utility Model Content

[0004] In view of the problems in the existing technology where the flywheel and disc brake compete for the wheel hub installation space, resulting in the use of single-sided braking and thus insufficient braking performance and poor stability, this utility model provides an electric vehicle wheel hub with dual-sided disc brakes.

[0005] This utility model is implemented as follows: a wheel hub for an electric vehicle with dual-sided disc brakes, comprising a wheel hub body, characterized in that: discs are respectively installed on both sides of the wheel hub body, each disc is equipped with a matching brake caliper, the brake caliper is connected to a controller, and the controller controls the brake caliper to brake synchronously.

[0006] In the above technical solution, preferably, side disc covers are detachably installed on both sides of the wheel hub body, and the side disc covers include a mounting part for fixing to the wheel hub body and a functional part located on the outer side.

[0007] In the above technical solution, preferably, the functional part is provided with an installation structure for installing the disc.

[0008] In the above technical solution, preferably, the mounting structure for mounting the disc is a threaded hole.

[0009] In the above technical solution, preferably, the functional part is provided with a mounting structure for mounting the flywheel.

[0010] In the above technical solution, preferably, the side disc cover is a replaceable modular accessory, which allows for the selective installation of a disc or a flywheel on the same side of the wheel hub body by replacing the side disc cover.

[0011] The electric vehicle wheel hub with dual-sided disc brakes proposed in this utility model application brings significant advantages and technical effects by installing discs on both sides of the wheel hub body and equipping each disc with a caliper that is synchronously controlled by a controller: Its core advantage lies in completely overturning the traditional single-sided braking mode. By controlling the controller to achieve synchronous action of both brake calipers, the torque generated during braking is balanced on both sides of the wheel hub, thus fundamentally eliminating wheel hub twisting caused by unilateral force and greatly improving the stability of the braking process and vehicle safety. At the same time, the dual-sided disc brake system provides double the braking force and heat capacity, effectively avoiding braking performance degradation caused by heat fade under continuous or high-intensity braking conditions, ensuring reliable and durable braking performance. In addition, this fundamental dual-sided braking structure also lays a solid foundation for subsequent modular design to accommodate other functions, providing a new technical path to resolve the contradiction between redundant pedal functions and high-performance braking requirements. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the disc mounting structure in this utility model; Figure 3 This is a schematic diagram of the side cover structure in this utility model. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0014] To address the existing problems, this utility model provides a wheel hub for electric vehicles with dual-sided disc brakes. To further illustrate the structure of this utility model, a detailed description is provided below in conjunction with the accompanying drawings: Please see Figure 1 , Figure 2 and Figure 3 This invention provides a dual-sided disc brake electric vehicle wheel hub, mainly comprising a wheel hub body 1, side disc covers, discs, brake calipers, and a controller. The wheel hub body 1 has a hollow structure, integrating motor windings and permanent magnets inside, which together constitute the wheel hub motor that drives the electric vehicle, serving as the power source for the wheel hub. Both ends of the wheel hub body 1 are provided with mounting flanges with bolt holes, providing a foundation for the installation of subsequent components.

[0015] To achieve dual-side braking, a first side disc cover 2 and a second side disc cover 3 are detachably installed on both sides of the wheel hub body 1. Each side disc cover includes a mounting part 201 and a functional part 202. The mounting part 201 is an annular flange with a through hole. A set of high-strength bolts 9 engage with the threaded holes on the mounting flanges on both sides of the wheel hub body 1, thereby firmly and detachably fixing the side disc cover to the wheel hub body 1. This bolted connection method ensures the reliability of power transmission. The functional part 202 is located on the outside of the side disc cover. In this embodiment, the functional parts 202 of both the first side disc cover 2 and the second side disc cover 3 are configured as mounting structures for mounting discs. Specifically, threaded holes 203 are machined evenly distributed circumferentially on the disc surface of the functional part 202.

[0016] The dual-side disc brake system consists of discs, calipers, and a controller working together. The first disc 4 and the second disc 5 are preferably ventilated discs with better heat dissipation, and they are bolted to the threaded holes 203 of the functional parts 202 of the first and second side disc covers 2 and 3, respectively. Corresponding to these two discs, the first caliper 6 and the second caliper 7, preferably hydraulic disc brake calipers in this embodiment, are mounted on the front and rear forks.

[0017] These brake calipers are connected to the brake lever of the controller 8 via a brake cable tee 9. The tee has one input port and two output ports. The input port connects to the handbrake lever via a brake cable, while the two output ports connect to the first brake caliper 6 and the second brake caliper 7 (mechanical disc brake calipers must be used in this case) via brake cables. When the rider squeezes the brake lever, the pulling force is transmitted through the brake cable to the brake cable tee, and the internal levers or balancing mechanism distribute the pulling force almost synchronously and evenly to the two output brake cables, thereby driving the mechanical brake calipers on both sides to move synchronously, clamping discs 4 and 5, achieving dual-side braking. This mechanical solution is lower in cost, simpler and more reliable in structure, and does not rely on an electrical system.

[0018] Bilateral synchronous braking completely eliminates the twisting and imbalance that may be caused by unilateral braking, greatly improving the stability, safety and braking effect of the brakes.

[0019] A significant advantage of this invention lies in its modular design concept, which is reflected in the functional replaceability of the side disc covers. Although this embodiment demonstrates a configuration with disc brake disc covers installed on both sides, users can easily replace the side disc covers to change the wheel hub function according to actual needs. For example, if the pedal drive function needs to be retained, the side disc cover on either side can be replaced with another type. The mounting part 201 of the replacement side disc cover has the same structure as the disc cover described above, ensuring its compatibility with the wheel hub body 1. However, its functional part 202 is set as a structure for installing the freewheel, such as a freehub base with standard external threads. In operation, simply remove the bolts, take off the disc brake side disc cover, install the freewheel side disc cover onto the same side of the wheel hub body 1 and tighten it, and then the freewheel and chain can be installed. By replacing the entire side disc cover in this way, selective configuration between installing disc brakes or freewheel functions on the same side of the wheel hub body 1 is achieved, giving the product great versatility and perfectly solving the contradiction of not being able to have both dual-sided disc brakes and pedal functions in traditional designs.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements 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. A wheel hub for an electric vehicle with dual-sided disc brakes, comprising a wheel hub body, characterized in that: Discs are mounted on both sides of the wheel hub body, and each disc is equipped with a matching caliper. The caliper is connected to a controller, which controls the caliper to brake synchronously. The wheel hub body has side disc covers installed on both sides in a detachable manner. The side disc covers include a mounting part for fixing to the wheel hub body and a functional part located on the outer side. The functional unit is provided with a mounting structure for mounting the disc.

2. The electric vehicle wheel hub with dual-sided disc brakes according to claim 1, characterized in that: The mounting structure for mounting the disc is a threaded hole.

3. The electric vehicle wheel hub with dual-sided disc brakes according to claim 1, characterized in that: The functional unit is provided with a mounting structure for mounting the flywheel.

4. The electric vehicle wheel hub with dual-sided disc brakes according to claim 1, characterized in that: The side disc cover is a replaceable modular accessory. By replacing the side disc cover, a disc or a flywheel can be selectively installed on the same side of the wheel hub body.

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