Electromagnetic braking electric scooter drive wheel structure

Abstract

This utility model discloses an electromagnetic braking drive wheel structure for an electric scooter, including a wheel frame, a drive motor, a movable wheel, and an electromagnetic component installed inside the wheel frame. The output end of the drive motor is connected to a rotating base, which is connected to a pressure plate via several elastic connectors, driving the movable wheel and several moving contact plates to rotate. A sliding sleeve is fixed on the stationary flange, and several stationary contact plates are slidably fitted onto its surface, with the stationary and moving contact plates arranged alternately. When the electromagnetic component is energized, the stationary and moving contact plates are magnetized and generate a repulsive force, separating them and allowing the movable wheel to rotate freely. When the electromagnetic component is de-energized or in a weakened magnetic state, the pressure plate, under the action of the elastic connectors, pushes the moving contact plates to engage with the stationary contact plates, generating friction to achieve braking. This structure achieves an integrated drive and braking design, reducing friction loss and improving drive efficiency under normal conditions, and providing reliable friction braking when needed, thus enhancing the safety and handling performance of the electric scooter.

Description

Technical Field

[0001] This utility model relates to the field of drive wheel technology, specifically to a drive wheel structure for an electromagnetically braked electric scooter. Background Technology

[0002] Currently, electric scooters, as a convenient personal transportation tool, are widely used in urban commuting and short-distance travel. To ensure safety during operation, existing electric scooters are generally equipped with braking devices, the most common types being drum brakes or hydraulic disc brakes.

[0003] In a typical drum brake structure, the brake drum is fixed to the wheel, and the brake pads are radially expanded and pressed against the drum wall under braking control, relying on friction to decelerate or stop the wheel. The advantages of this structure are mature technology and low cost. However, because the brake pads and the drum wall are always in contact or have a small gap, friction loss and heat fade are prone to occur during operation, resulting in a decrease in braking performance. Moreover, the brake pads need to be replaced frequently after long-term use.

[0004] In hydraulic disc brakes, the brake disc is fixedly connected to the wheel, and a hydraulic cylinder pushes the friction pads inside the brake caliper to clamp the brake disc, thereby generating friction to achieve braking. This braking method has strong braking force, but its structure is complex and has many parts. Over long-term use, hydraulic lines are prone to problems such as oil leaks and aging seals, increasing maintenance costs. Furthermore, hydraulic brakes operate in a rigid braking mode, which can easily cause braking shocks and affect the smoothness of vehicle operation.

[0005] Overall, the braking structure of existing electric scooters has the following shortcomings: High friction loss: Traditional drum or hydraulic disc brakes rely on mechanical friction to achieve braking, which easily leads to severe wear of parts and frequent maintenance.

[0006] Low energy efficiency: Continuous friction occurs during braking, which may cause slight drag even when not braking, reducing the energy efficiency of electric scooters.

[0007] Poor braking flexibility: Both hydraulic brakes and drum brakes are rigid brakes, making it difficult to achieve continuous adjustment of braking force, which can easily lead to excessive braking.

[0008] Therefore, how to provide a braking structure that can be integrated with motor drive, avoid friction loss under normal conditions, and achieve flexible adjustment of braking force when needed has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0009] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0010] Therefore, the technical solution adopted by this utility model is as follows: an electromagnetic braking electric scooter drive wheel structure, including a wheel frame, a drive motor, a moving wheel, and an electromagnetic component embedded in the inner side of the wheel frame. When energized, the electromagnetic component magnetizes the stationary and moving contact plates, causing them to repel each other and enabling free rotation during driving. When de-energized or under weak magnetic field conditions, the moving and stationary contact plates adhere to each other and generate friction under the action of an elastic connector, thus achieving braking.

[0011] In a preferred embodiment, the output end of the drive motor is connected to a rotary base, and several elastic connecting parts are fixed to the surface of the rotary base. The other end of each elastic connecting part is connected to a movable wheel. The movable wheel has a sliding groove on its inner side, which slidably engages with the moving contact plate; the surface of the stationary flange has a sliding sleeve seat, which slidably engages with the stationary contact plate. The moving and stationary contact plates are arranged alternately and are both made of ferromagnetic material, repelling and separating from each other when the electromagnetic component is energized. Specifically, this structure ensures that the movable wheel is in a frictionless state when driven by the motor, reducing energy consumption and improving driving stability.

[0012] In a preferred embodiment, the rotary table is further configured to rotate under the drive of a drive motor, and its surface is elastically connected to the surface of the pressure plate via an elastic connector. The pressure plate is located inside the moving wheel and is in contact with a moving contact plate on one side. Specifically, when the electromagnetic component is weakened, this configuration uses the elastic connector to pull the pressure plate to squeeze the moving contact plate and the stationary contact plate, causing them to gradually come into contact and form friction, thereby braking the moving wheel.

[0013] In a preferred embodiment, the moving contact plate is further configured such that its outer periphery has several sliding lugs, and the inner side of the moving wheel has a sliding groove. The sliding lugs are slidably fitted into the inner side of the sliding groove, thereby ensuring that the moving contact plate can move axially while maintaining radial positioning. The inner side of the stationary contact plate has sliding teeth that engage and slide with the surface of the sliding sleeve seat. Specifically, this structure ensures stable installation and precise movement trajectory of the contact plate, improving braking reliability.

[0014] In a preferred embodiment, the moving contact plate is further configured with a plurality of braking tabs on its surface opposite to the stationary contact plate, and the surface of the stationary contact plate has a frosted texture. Specifically, this design can provide greater friction when the contact plates are in contact, significantly enhancing the braking effect.

[0015] In a preferred embodiment, the rotary seat and the resilient connector are further configured such that the resilient connector is sleeved inside the stationary flange, and under normal conditions, the resilient connector is in a stretched state. Specifically, when the electromagnetic assembly is de-energized, the resilient connector, under the action of restoring force, drives the pressure plate closer to the moving contact plate, thereby achieving rapid and effective braking.

[0016] In a preferred embodiment, the electromagnetic component is further configured as an electromagnet structure, with a magnetic shielding partition between the electromagnetic component and the drive motor to prevent the magnetic force generated by the electromagnetic component from interfering with the operation of the drive motor. Specifically, this configuration ensures the normal operation of the motor and avoids energy efficiency reduction and failure risks caused by electromagnetic interference.

[0017] In a preferred embodiment, the rotary seat surface is further configured with several sliding rods, and the pressure plate surface is configured with several sliding sleeves. The sliding rods and sliding sleeves cooperate to guide the axial movement of both, and an elastic connecting member is sleeved on the outside of the sliding sleeves. Specifically, this structure ensures the stability of the pressure plate movement, enables the elastic connecting member to reliably reset during braking and release, and improves the durability of the braking system.

[0018] In a preferred embodiment, the moving wheel is further configured such that it includes an outer tire layer and an inner support layer. The outer tire layer employs a rubber bushing structure, while the inner support layer utilizes a metal hub structure, with a sliding groove located inside the metal hub. Specifically, this structure enhances the overall load-bearing capacity and installation stability while ensuring the wear resistance and shock absorption of the drive wheel.

[0019] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, by setting an electromagnetic component inside the wheel frame and utilizing the magnetization repulsion effect of the electromagnetic component on the stationary contact plate and the moving contact plate, adjacent contact plates can be reliably separated under normal conditions, thereby avoiding ineffective friction generated by the braking components during the driving process, ensuring the efficient rotation of the moving wheel under the action of the drive motor, and realizing improved energy utilization and smooth operation during the driving process.

[0020] 2. In this invention, through the synergistic effect of the rotating base, elastic connector, and pressure plate, the moving contact plate and the stationary contact plate gradually come into contact and generate friction when the magnetic field of the electromagnetic component weakens, thereby achieving the braking function of the moving wheel. This structure not only enables stepless adjustment of the braking force according to the energizing power of the electromagnetic component, but also avoids the impact caused by rigid braking, improving the flexibility and safety of braking, and significantly improving the handling performance and user experience of the electric scooter. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is a schematic diagram of the inner structure of the moving wheel according to an embodiment of the present invention; Figure 3 This is an exploded structural diagram of one embodiment of the present invention; Figure 4 This is a schematic diagram of the drive motor and pressure plate structure according to one embodiment of the present invention; Figure 5This is a schematic diagram of the surface structure of the stationary contact plate and the moving contact plate according to an embodiment of the present invention.

[0022] Figure label: 1. Wheel frame; 2. Drive motor; 3. Moving wheel; 4. Electromagnetic assembly; 5. Stationary contact plate; 6. Stationary flange; 21. Rotary seat; 22. Elastic connector; 23. Pressure plate; 31. Sliding groove; 32. Moving contact plate; 321. Sliding lug; 51. Sliding tooth; 61. Sliding sleeve seat. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0024] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0025] The following describes, with reference to the accompanying drawings, some embodiments of the present invention, providing a drive wheel structure for an electric scooter with electromagnetic braking.

[0026] Combination Figures 1-5 As shown, this utility model provides an electromagnetic braking electric scooter drive wheel structure, including a wheel frame 1, a drive motor 2, a movable wheel 3, and an electromagnetic component 4 embedded in the inner side of the wheel frame 1. A stationary flange 6 is fixedly installed on one side of the wheel frame 1. The drive motor 2 is fixedly installed on one side of the wheel frame 1, and its output end passes through the electromagnetic component 4 and the surface of the wheel frame 1, and is connected to a rotating base 21. Several elastic connecting members 22 are fixedly connected to the surface of the rotating base 21, and the other end of the elastic connecting members 22 is connected to the movable wheel 3. Several sliding grooves 31 are opened on the inner side of the movable wheel 3, and several moving contact plates 32 are slidably sleeved in the sliding grooves 31. A sliding sleeve seat 61 is fixedly installed on the surface of the stationary flange 6, and several stationary contact plates 5 are slidably sleeved on the surface of the sliding sleeve seat 61. The moving contact plates 32 and the stationary contact plates 5 are arranged alternately, and all are made of ferromagnetic material. When the electromagnetic component 4 is energized, it can magnetize the stationary contact plate 5 and the moving contact plate 32, so that the adjacent stationary contact plate 5 and the moving contact plate 32 generate a magnetic repulsion effect of the same pole, thereby realizing the separation between the contact plates and ensuring the free rotation of the moving wheel 3.

[0027] In a preferred embodiment, the rotating base 21 rotates under the drive of the drive motor 2. The surface of the rotating base 21 is elastically connected to the surface of the pressure plate 23 via several elastic connectors 22. The pressure plate 23 is located inside the moving wheel 3 and is fixedly attached to the surface of the moving contact plate 32 on one side. In this structure, when the magnetic field of the electromagnetic component 4 weakens, the pressure plate 23 moves closer to the rotating base 21 under the pulling action of the elastic connectors 22, thereby pushing the several stationary contact plates 5 and the moving contact plate 32 closer together and into contact, increasing the frictional force, and thus achieving braking of the moving wheel 3.

[0028] In another preferred embodiment, a plurality of evenly distributed sliding lugs 321 are fixedly installed on the outer periphery of the moving contact plate 32, and the sliding grooves 31 are evenly distributed along the circumferential direction on the inner side of the moving wheel 3. The sliding lugs 321 can slidably fit onto the inner side of the sliding grooves 31, thereby ensuring that the moving contact plate 32 is fixed in the radial position while being able to move in the axial direction. In addition, a plurality of sliding teeth 51 are provided on the inner side of the stationary contact plate 5, and the sliding teeth 51 mesh with the surface of the sliding sleeve seat 61, so that the stationary contact plate 5 can move in the axial direction but remain fixed to the stationary flange 6 without rotating, thereby forming a friction braking fit structure.

[0029] In another preferred embodiment, the surface of the moving contact plate 32 is provided with a plurality of brake protrusions arranged opposite to the stationary contact plate 5, and the surface of the stationary contact plate 5 is processed to have a frosted texture to improve the coefficient of friction. When the moving contact plate 32 and the stationary contact plate 5 are in contact with each other under the action of the pressure plate 23, the brake protrusions and the frosted texture can provide greater friction, thereby enhancing the braking effect.

[0030] In another preferred embodiment, the rotary seat 21 and the elastic connector 22 are sleeved on the inner side of the stationary flange 6. Under normal conditions, the elastic connector 22 is in an elastically stretched state. When the electromagnetic component 4 is de-energized or the magnetic field weakens, the elastic connector 22, under the action of tensile recovery, drives the pressure plate 23 to approach the moving contact plate 32, thereby forming friction braking.

[0031] In another preferred embodiment, the electromagnetic component 4 adopts an electromagnet structure, and a magnetic shielding plate is provided between one side of it and the drive motor 2 to isolate the magnetic force of the electromagnetic component 4 from interfering with the normal operation of the drive motor 2. This configuration avoids electromagnetic field leakage from affecting the operational stability of the motor.

[0032] In another preferred embodiment, the surface of the rotary seat 21 is provided with a plurality of sliding rods, and the surface of the pressure plate 23 is provided with a plurality of sliding sleeves. The sliding rods and sliding sleeves cooperate to guide the axial movement between the rotary seat 21 and the pressure plate 23. The elastic connector 22 is sleeved on the outside of the sliding sleeve. In this structure, the stability of the pressure plate 23 during axial movement is ensured, and the elastic connector 22 can reliably reset when subjected to force.

[0033] In another preferred embodiment, the movable wheel 3 includes an outer tire layer and an inner support layer. The outer tire layer adopts a rubber block structure to ensure friction with the ground and cushioning performance. The inner support layer adopts a metal hub structure to ensure strength and load-bearing capacity. The sliding groove 31 is located on the inner side of the metal hub and is used to cooperate with the sliding lug 321 to achieve stable installation and movement of the moving contact plate 32.

[0034] Working principle and usage process of this utility model: This utility model discloses an electromagnetic braking electric scooter drive wheel structure. Power is provided by a drive motor 2, electromagnetic components 4 control the opening and braking, and the alternating arrangement of stationary contact discs 5 and moving contact discs 32 forms an integrated wheel assembly structure that can achieve both driving and controllable braking. Its working principle is as follows: Normal driving state: After the drive motor 2 starts, its output end drives the rotating seat 21 to rotate; the rotating seat 21 is connected to the pressure plate 23 through several elastic connecting parts 22, thereby driving the moving wheel 3 and several internal moving contact plates 32 to rotate synchronously; the stationary contact plate 5 is kept stationary by meshing with the stationary flange 6 and the sliding sleeve seat 61. When the electromagnetic component 4 is energized, the stationary contact plate 5 and the moving contact plate 32 are magnetized and generate a repulsive force of the same pole. The adjacent contact plates are separated from each other to avoid frictional contact, thereby ensuring that the moving wheel 3 can rotate freely and smoothly realize the motor-driven walking function.

[0035] Braking state: When braking is required, the excitation current of the electromagnetic component 4 gradually decreases, and the magnetic field force it generates weakens accordingly; the repulsion effect between the stationary contact plate 5 and the moving contact plate 32 gradually decreases, and under the pulling action of the elastic connector 22, the pressure plate 23 drives the moving contact plate 32 to gradually approach the stationary contact plate 5; as the tightness of the fit increases, the friction force is significantly enhanced, and the stationary contact plate 5 in the stationary state applies braking force to the rotating moving contact plate 32 through friction, thereby blocking the rotation of the moving wheel 3 and achieving reliable braking.

[0036] Adjustment and control: By adjusting the energizing power of the electromagnetic component 4, the magnetic field strength can be precisely controlled, thereby adjusting the separation effect between the stationary contact plate 5 and the moving contact plate 32; the higher the energizing power of the electromagnetic component 4, the stronger the magnetic field repulsion, the more obvious the contact plate separation effect, and the more the moving wheel 3 tends to rotate freely; the lower the energizing power of the electromagnetic component 4, the weaker the magnetic field effect, the tighter the contact plate fits, and the enhanced friction braking effect, thereby achieving stepless control of the braking force of the moving wheel 3.

[0037] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An electromagnetic braking electric scooter drive wheel structure, characterized in that, include: The wheel frame (1), drive motor (2), moving wheel (3) and electromagnetic component (4) embedded in the inner side of the wheel frame (1) are provided. A stationary flange (6) is fixedly installed on one side of the wheel frame (1). The drive motor (2) is fixedly installed on one side of the wheel frame (1) and its output end passes through the electromagnetic component (4) and the surface of the wheel frame (1) and is connected to a rotating seat (21). Several elastic connecting pieces (22) are fixedly connected to the surface of the rotating seat (21). The other end of the elastic connecting piece (22) is connected to the moving wheel (3). Several sliding grooves (31) are opened on the moving wheel (3) and several moving contact plates (32) are slidably sleeved on it. A sliding sleeve seat (61) is fixedly installed on the surface of the stationary flange (6). Several stationary contact plates (5) are slidably sleeved on the surface of the sliding sleeve seat (61). Several moving contact plates (32) and stationary contact plates (5) are arranged alternately in sequence.

2. The electromagnetic braking electric scooter drive wheel structure according to claim 1, characterized in that, The rotating seat (21) rotates under the drive of the drive motor (2). The surface of the rotating seat (21) is elastically connected to the surface of the pressure plate (23) through several elastic connectors (22). The pressure plate (23) is located inside the moving wheel (3) and is fixedly attached to the surface of the moving contact plate (32) on one side.

3. The electromagnetic braking electric scooter drive wheel structure according to claim 1, characterized in that, The outer periphery of the moving contact plate (32) is fixedly equipped with several evenly distributed sliding lugs (321). The sliding grooves (31) are evenly distributed in the circumferential direction on the inner side of the moving wheel (3). The sliding lugs (321) are slidably sleeved on the inner side of the sliding grooves (31). The inner side of the stationary contact plate (5) is provided with several sliding teeth (51), and the sliding teeth (51) engage and slide with the surface of the sliding sleeve seat (61).

4. The electromagnetic braking electric scooter drive wheel structure of claim 1, wherein, The moving contact plate (32) has a plurality of brake protrusions arranged relative to the surface of the stationary contact plate (5), and the surface of the stationary contact plate (5) is frosted rough. Both the stationary contact plate (5) and the moving contact plate (32) are made of ferromagnetic material. When the electromagnetic component (4) is energized, the magnetic field generated by the electromagnetic component (4) magnetizes the stationary contact plate (5) and the moving contact plate (32), causing them to be separated by a repulsive force.

5. The electromagnetic braking electric scooter drive wheel structure according to claim 1, characterized in that, The rotating seat (21) and the elastic connector (22) are fitted onto the inner side of the static flange (6). Under normal conditions, the elastic connector (22) is in an elastic tension state.

6. The electromagnetic braking electric scooter drive wheel structure according to claim 1, characterized in that, The electromagnetic component (4) is an electromagnet structure. A magnetic shielding plate is provided between one side of the electromagnetic component (4) and the drive motor (2) to isolate the magnetic force of the electromagnetic component (4) from interfering with the operation of the drive motor (2).

7. The electromagnetic braking electric scooter drive wheel structure of claim 2, wherein, The surface of the rotary seat (21) is provided with several sliding rods and the surface of the pressure plate (23) is provided with several sliding sleeves. The axial movement between the rotary seat (21) and the pressure plate (23) is guided by the sliding rods and the sliding sleeves. The elastic connector (22) is sleeved on the outside of the sliding sleeve.

8. The electromagnetic braking electric scooter drive wheel structure of claim 1, wherein, The movable wheel (3) includes an outer tire layer and an inner support layer. The outer tire layer is a rubber bushing structure, and the inner support layer is a metal hub. The sliding groove (31) is located on the inner side of the metal hub.

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