Hub assembly structure

Abstract

The utility model provides a wheel hub assembly structure, which relates to the technical field of wheel hub motors and comprises a tire, a wheel hub body is arranged in the tire, the tire is sleeved on the wheel hub body, a connecting shaft is mounted in the wheel hub body, a connecting sleeve is mounted in the connecting shaft, a rotor ring is mounted in the connecting sleeve, and the rotor ring is sleeved on the wheel hub body. A stator ring is installed inside the rotor ring, the rotor ring is rotatably connected with the stator ring, a plurality of holes are formed in the inner wall of the stator ring, a connecting piece is installed at one end of the connecting shaft, the connecting piece is connected with the connecting shaft, and a plurality of heat dissipation holes are formed in the inner wall of the rotor and the inner wall of the stator. And the heat dissipation holes in the stator and the rotor are communicated with each other. According to the utility model, the problems that extremely high heat is generated when the inner rotor motor is used, the heat dissipation efficiency is too low due to the small contact surface when air cooling heat dissipation is adopted, and water cooling cannot be additionally arranged due to the small internal control space are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hub motors, and in particular to a hub assembly structure. Background Art

[0002] A hub motor is a drive system that installs an electric motor directly inside the vehicle's wheel hub, saving a lot of space in the vehicle and thereby improving the vehicle's endurance efficiency.

[0003] Existing technologies include the utility model with announcement number CN111293819B, which discloses a hub motor. The patent adopts a motor shaft, a stator, a casing, a rotor, and a guide plate. The guide plate has a windward surface, which is used to guide the airflow in the heat dissipation channel to blow toward the heat-generating components in the casing to dissipate heat from the heat-generating components in the casing. The guide plate is movably arranged on the casing. Compared with the direct ventilation method in the prior art, the guide plate of the utility model guides the airflow toward the heat-generating components in the casing, which can better dissipate heat from the heat-generating components in the casing. At the same time, the guide plate is movably arranged on the casing. When the casing rotates, under the action of gravity, the posture of the guide plate changes, changing the position of the airflow blowing toward the heat-generating components in the casing, so that the heat of the heat-generating components in the casing is more evenly heated, and the heat dissipation effect of the heat-generating airflow in the casing on the heat-generating components in the casing is uniform, solving the technical problem of poor heat dissipation effect caused by poor uniformity of the internal heat dissipation airflow in the current air-cooled hub motor.

[0004] The inventor of the utility model discovered in daily use that when using a hub motor, because the inner rotor motor generates extremely high heat during use, the use of air cooling has a low heat dissipation efficiency due to the small contact surface, and the small internal control space makes it impossible to install water cooling. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings in the prior art and to propose a wheel hub assembly structure.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a wheel hub assembly structure, including a tire, a wheel hub body is provided inside the tire, the tire is sleeved on the wheel hub body, a connecting shaft is installed inside the wheel hub body, a connecting sleeve is installed inside the connecting shaft, a rotor ring is installed inside the connecting sleeve, a stator ring is installed inside the rotor ring, the rotor ring is rotatably connected to the stator ring, a plurality of holes are opened on the inner wall of the stator ring, a connecting piece is installed at one end of the connecting shaft, and the connecting piece is connected to the connecting shaft.

[0007] By adopting the above technical solution, when the hub motor is running, the stator ring is connected and fixed to the frame, and then the rotor ring rotates on the surface of the stator ring, the rotor ring drives the connecting sleeve to rotate, the connecting sleeve drives the connecting shaft to rotate, the connecting shaft drives the connecting part and the tire to rotate, and the friction force generated between the tire and the contact surface drives the vehicle to move.

[0008] Preferably, the inner walls of the rotor and the stator are each provided with a plurality of heat dissipation holes, and the heat dissipation holes on the stator and the rotor are interconnected.

[0009] By adopting this preferred solution, the heat dissipation holes can accelerate the heat dissipation of the hub motor, which can increase the horsepower of the hub motor in disguise.

[0010] Preferably, the rotor is made of silicon steel sheet.

[0011] Preferably, the hub body is made of titanium alloy, and the inner diameter of the hub body is hollow.

[0012] Preferably, the tire comprises, from the inside to the outside, an airtight layer, a carcass cord layer, two steel belt layers, and an outermost tread layer and sidewall layer.

[0013] Preferably, the tire beads on the inner side are all made of steel wire.

[0014] Preferably, two circles of apex rubber are provided between the steel belt layer and the carcass cord layer.

[0015] Preferably, a nylon cap belt is provided between the tread layer and the steel belt layer.

[0016] Preferably, the tread layer and the sidewall layer are both made of rubber.

[0017] Preferably, the steel belt layer is composed of steel wires interlaced and woven.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] 1. In the present invention, by setting up an overall structure, the stator is inside and the rotor is outside, which replaces the traditional distribution method of the stator inside the outer rotor. When the outer rotor motor is cooled by air, the contact surface is larger than that of the inner rotor, so the heat dissipation efficiency of the outer rotor motor is higher than that of the inner rotor motor. Moreover, because the interior of the outer rotor is relatively empty, water cooling can be installed on the inner wall of the outer rotor motor. Therefore, the outer rotor is more advanced in heat dissipation. Moreover, the power of the hub motor depends on the heat dissipation efficiency. The better the heat dissipation efficiency, the greater the power it can carry. Therefore, under the same size, the power of the outer rotor motor is higher. The rate is greater than that of the inner rotor motor, and the advantage of the inner and outer rotor hub motor over the wheel hub driven by the current engine drive shaft is that the rotation range is larger, so it can complete difficult turns on some narrow roads, which is not available in the wheel hub driven by the existing engine drive shaft. In summary, the outer rotor motor is ahead of the inner rotor motor in terms of power and heat dissipation efficiency, and the advantage of the embedded type is that the magnetic circuit design is better, the salient pole rate is high, the torque is large, and the weak magnetic speed expansion capability is strong. The power density and torque density of the motor are very high, and the embedded wheel hub is lighter, the performance will be significantly improved, the volume will be smaller, and the cost will be greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a three-dimensional structural diagram of a wheel hub assembly structure proposed by the utility model;

[0021] Figure 2 The utility model proposes a wheel hub assembly structure Figure 1 Schematic diagram of the side structure;

[0022] Figure 3 The utility model proposes a wheel hub assembly structure Figure 2 Schematic diagram of the internal structure;

[0023] Figure 4 The utility model proposes a wheel hub assembly structure Figure 1 Schematic diagram of part of the structure;

[0024] Figure 5 The utility model proposes a wheel hub assembly structure Figure 4 Schematic diagram of the internal structure;

[0025] Figure 6 The utility model provides a schematic diagram of the rotor ring structure of a hub assembly structure.

[0026] Legend: 1. Tire; 2. Stator ring; 3. Hub body; 4. Connecting shaft; 5. Connecting piece; 6. Connecting sleeve; 7. Rotor ring; 8. Hole; 9. Heat dissipation hole. DETAILED DESCRIPTION

[0027] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features therein can be combined with each other without conflict.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0029] Example 1, as Figure 1-5 As shown, the utility model provides a wheel hub assembly structure, including a tire 1, a wheel hub body 3 is provided inside the tire 1, the tire 1 is sleeved on the wheel hub body 3, a connecting shaft 4 is installed inside the wheel hub body 3, a connecting sleeve 6 is installed inside the connecting sleeve 6, a rotor ring 7 is installed inside the connecting sleeve 6, a stator ring 2 is installed inside the rotor ring 7, the rotor ring 7 is rotatably connected to the stator ring 2, a plurality of holes 8 are opened on the inner wall of the stator ring 2, a connecting piece 5 is installed at one end of the connecting shaft 4, the connecting piece 5 is connected to the connecting shaft 4, when the wheel hub motor is running, the stator ring 2 is connected to the frame for fixing, and then the rotor ring 7 rotates on the surface of the stator ring 2, the rotor ring 7 drives the connecting sleeve 6 to rotate, the connecting sleeve 6 drives the connecting shaft 4 to rotate, and the connecting shaft 4 drives the connecting piece 5 and the wheel hub motor to rotate. As the tire 1 rotates, friction is generated between the tire 1 and the contact surface to drive the vehicle to move. Several heat dissipation holes 9 are provided on the inner walls of the rotor ring 7 and the stator ring 2. The heat dissipation holes 9 on the stator ring 2 and the rotor ring 7 are interconnected. The heat dissipation holes 9 can accelerate the heat dissipation of the hub motor and increase the horsepower of the hub motor in disguise. The rotor ring 7 is made of silicon steel sheet, the hub body 3 is made of titanium alloy, and the inner diameter of the hub is hollow. The tire 1 is composed of an airtight layer, a carcass cord layer, two layers of steel belt layers, and the outermost tread layer and sidewall layer from the inside to the outside. The tire beads on the inner side of the tire 1 are all made of steel wire. Two circles of apex rubber are arranged between the steel belt layer and the carcass cord layer, and a nylon cap belt is arranged between the tread and the steel belt layer. The tread and sidewall are both made of rubber, and the steel belt layer is composed of steel wires woven in an interlaced manner.

[0030] The effect achieved by the entire device is that the advantages of the embedded type are better magnetic circuit design, high salient pole rate, large torque, and strong weak magnetic speed expansion capability. The motor power density and torque density are very high, so the application range of the embedded hub motor is very wide. Moreover, the embedded hub motor reduces the complexity of the transmission system and can effectively improve the energy transmission efficiency. In addition, each wheel can be driven independently, which enables the vehicle to achieve better dynamic performance and stability during acceleration and braking.

[0031] Its overall working principle is that when the hub motor is running, the stator ring 2 is connected to the frame for fixation, and then the rotor ring 7 rotates on the surface of the stator ring 2, the rotor ring 7 drives the connecting sleeve 6 to rotate, the connecting sleeve 6 drives the connecting shaft 4 to rotate, the connecting shaft 4 drives the connecting part 5 and the tire 1 to rotate, and the friction force generated between the tire 1 and the contact surface drives the car to move. The heat dissipation holes 9 can accelerate the heat dissipation of the hub motor, which can increase the horsepower of the hub motor in disguise.

[0032] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any other form. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes for application in other fields. However, any simple modification, equivalent change and modification of the above embodiment made according to the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A wheel hub assembly structure, comprising a tire (1), characterized in that: A hub body (3) is provided inside the tire (1), the tire (1) is sleeved on the hub body (3), a connecting shaft (4) is installed inside the hub body (3), a connecting sleeve (6) is installed inside the connecting shaft (4), a rotor ring (7) is installed inside the connecting sleeve (6), a stator ring (2) is installed inside the rotor ring (7), the rotor ring (7) is rotatably connected to the stator ring (2), a plurality of holes (8) are provided on the inner wall of the stator ring (2), a connecting piece (5) is installed at one end of the connecting shaft (4), and the connecting piece (5) is connected to the connecting shaft (4).

2. The wheel hub assembly structure according to claim 1, characterized in that: The inner walls of the rotor ring (7) and the stator ring (2) are both provided with a plurality of heat dissipation holes (9), and the heat dissipation holes (9) on the stator ring (2) and the rotor ring (7) are interconnected.

3. The wheel hub assembly structure according to claim 1, characterized in that: The rotor ring (7) is made of silicon steel sheet.

4. The wheel hub assembly structure according to claim 1, characterized in that: The hub body (3) is made of titanium alloy, and the inner diameter of the hub body (3) is hollow.

5. The wheel hub assembly structure according to claim 1, characterized in that: The tire (1) comprises, from the inside to the outside, an airtight layer, a carcass cord layer, two steel belt layers, and an outermost tread layer and a sidewall layer.

6. The wheel hub assembly structure according to claim 5, characterized in that: The tire beads on the inner side of the tire (1) are all made of steel wire.

7. The wheel hub assembly structure according to claim 5, characterized in that: Two circles of apex rubber are arranged between the steel belt layer and the carcass cord layer.

8. The wheel hub assembly structure according to claim 5, characterized in that: A nylon cap belt is provided between the tread layer and the steel belt layer.

9. The wheel hub assembly structure according to claim 5, characterized in that: The tread layer and the sidewall layer are both made of rubber.

10. The wheel hub assembly structure according to claim 5, characterized in that: The steel belt layer is formed by interlaced weaving of steel wires.

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