A passenger car active wheel hub device based on flexible cable structure and a control method thereof

Abstract

The application is suitable for the field of automobile aerodynamics and thermal management technology, and provides a passenger car active wheel hub device based on a flexible cable structure and a control method thereof.The device comprises a wheel hub, the wheel hub is provided with a plurality of spokes in the circumferential direction, a spoke cavity is arranged in the wheel hub at a corresponding position of each spoke, a fixed spoke column is arranged in each spoke cavity, a torsional spring is arranged outside the spoke column, a circular truncated cone drum is mounted outside the torsional spring, a flexible shielding device is arranged, the flexible shielding device comprises a flexible blade, the flexible blade comprises a flexible ring belt and a reinforcing rod which is uniformly distributed in the radial direction of the wheel hub, an end of the flexible blade is fixedly connected with a blade slider, the two ends of the blade slider are respectively provided with a first slider cable hole and a second slider cable hole, and a winding module is arranged.The driving mechanism of the device is simple, the space utilization rate is high, the manufacturing cost is low, and the device is suitable for the application requirements of passenger cars in the aspects of air resistance reduction and brake heat dissipation balance.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile aerodynamics and thermal management, and particularly relates to a passenger vehicle active hub device based on a flexible cable structure and a control method thereof. BACKGROUND

[0002] With the rapid development of the automobile industry and the continuous increase of vehicle driving speed, the influence of air-induced resistance and moment on the performance of the whole vehicle is increasingly significant. In order to improve the fuel economy and stability during high-speed driving, reducing the air resistance of the whole vehicle has become an important target in vehicle shape design.

[0003] The closed hub is a common means to reduce the air resistance coefficient of the automobile, which can effectively reduce the turbulence and additional resistance in the wheel area. However, the closed hub can significantly limit the ventilation condition of the brake system. For traditional fuel vehicles, a large amount of heat is generated during braking, and if the ventilation condition is insufficient, it is easy to cause brake fade, thermal cracking and safety hazards, so the completely closed hub is not suitable for traditional fuel vehicles.

[0004] Although variable-opening hub structures have appeared in the prior art, they mostly rely on rigid blades or independent motors for piece-by-piece driving, which is complex in mechanism, large in size, low in space utilization, difficult to achieve compact arrangement in the limited hub cavity, and high in manufacturing and maintenance cost.

[0005] To solve the above problems, an active hub device is needed, which is compact in structure, reliable in driving, and can dynamically adjust the ventilation opening in high-speed driving to balance the aerodynamic drag reduction and the heat dissipation of the brake system. SUMMARY

[0006] The purpose of the embodiments of the application is to provide a passenger vehicle active hub device based on a flexible cable structure and a control method thereof, which aims to solve the problems raised in the background art.

[0007] The embodiments of the application are implemented as follows: a passenger vehicle active hub device based on a flexible cable structure, comprising:

[0008] A hub is provided with a plurality of spokes in the circumferential direction, and a ventilation opening is formed between adjacent spokes. A spoke cavity is arranged at a corresponding position of each spoke in the hub, and a fixed spoke column is arranged in each spoke cavity. A torsional spring is sleeved outside the spoke column and fixedly connected to one end of the torsional spring. A circular truncated cone drum is installed outside the torsional spring, and the other end of the torsional spring is fixedly connected to the circular truncated cone drum.

[0009] The flexible shielding device comprises flexible blades corresponding to each ventilation opening, and one end of the flexible blade is wound on a circular table reel, the flexible blade comprises a flexible ring belt and a reinforcing rod uniformly distributed along the radial direction of the hub, and the end of the flexible blade is fixedly connected with a blade sliding block, and the two ends of the blade sliding block are respectively provided with a first sliding block cable hole and a second sliding block cable hole;

[0010] The winding module is installed in the driving cabin arranged at the center of the hub, and comprises a reel and a driving unit for driving the reel to rotate, the reel is installed on the central cylinder arranged at the center of the driving cabin, and comprises coaxially arranged first and second reels, a plurality of first reel cable holes are arranged in a ring on the first reel, a plurality of second reel cable holes are arranged in a ring on the second reel, and one flexible cable is connected at each first and second reel cable hole, each flexible cable connected with the first reel cable hole is connected with each first sliding block cable hole, and each flexible cable connected with the second reel cable hole is connected with each second sliding block cable hole.

[0011] The flexible cable enters the flexible cable channel through the cable inlet hole arranged on the driving cabin, the flexible cable channel is in communication with the first and second sliding rails at the same time, and the flexible cable is connected with the first and second sliding block cable holes on the blade sliding block along the first and second sliding rails.

[0012] In a further technical solution, the driving unit comprises a motor, the output end of the motor is connected with a worm, the worm is provided with worm teeth, the reel is provided with worm gear teeth meshing with the worm teeth, and the worm gear teeth are coaxially connected with the first reel through a worm shaft.

[0013] In a further technical solution, the outer side of the spoke cavity is provided with a spoke cover plate for covering the spoke cavity.

[0014] In a further technical solution, the hub is further provided with a center cover plate for closing the driving cabin.

[0015] In a further technical solution, the reel further comprises a cushion table arranged on the side of the second reel away from the first reel, and the top end of the cushion table is in contact with the center cover plate for isolating the second reel from the center cover plate.

[0016] In a further technical solution, the driving cabin is further divided into a battery cabin, a motor cabin and a control cabin for fixedly installing a battery, a motor and a controller respectively, and the electrical and wiring communication between the battery cabin, the motor cabin and the control cabin is realized through the first and second sunken channels in the driving cabin.

[0017] A further technical solution is that the central area of ​​the wheel hub is provided with several bolt holes, and a countersunk hole coaxial with the bolt holes is machined near the end of the drive compartment to accommodate connecting bolts and nuts.

[0018] A further technical solution, the control method of the active wheel hub device for passenger vehicles includes the following steps:

[0019] Step 1: Collect vehicle operating status information, which includes at least brake disc temperature and / or vehicle speed;

[0020] Step 2: Transmit vehicle operating status information to the controller;

[0021] Step 3: The controller outputs a control signal according to the preset control strategy to drive the motor to rotate. The motor drives the reel to rotate through the worm gear, thereby driving the first reel and the second reel to wind up and unwind the flexible rope.

[0022] Step 4: The flexible cable retracts and extends, causing the flexible shielding device to unfold or roll up at the ventilation opening, thereby adjusting the effective ventilation area of ​​the ventilation opening and achieving a dynamic balance between vehicle air resistance and brake cooling performance.

[0023] This invention provides an active wheel hub device for passenger vehicles based on a flexible cable structure and its control method. This device achieves synchronous opening and closing of multiple flexible blades through a combination of flexible cables and a frustum-shaped drum. It features a compact structure, flexible arrangement, and reliable aerodynamic adjustment within a limited wheel hub cavity. The flexible blades consist of flexible rings and reinforcing rods, ensuring flexibility in the winding direction while providing rigid support after radial unfolding. Torsion springs provide failure protection, and the controller intelligently adjusts the ventilation area based on vehicle operating conditions. Compared to existing complex structures relying on multi-motor, blade-by-blade drive, this device has a simpler drive mechanism, higher space utilization, and lower manufacturing cost, making it suitable for passenger vehicle applications requiring reduced air resistance and balanced brake cooling. Attached Figure Description

[0024] Figure 1 An exploded view from the right side of an active wheel hub device for passenger vehicles based on a flexible cable structure, provided as an embodiment of the present invention;

[0025] Figure 2 A front view of a passenger vehicle active wheel hub device based on a flexible cable structure provided in an embodiment of the present invention;

[0026] Figure 3 for Figure 2 A partial 3D view of region A in the image (with the central cover plate removed);

[0027] Figure 4 for Figure 2A partial 3D view of region A in the image (excluding the central cover plate, flexible rope, and reel);

[0028] Figure 5 A front view of the wheel hub in an active wheel hub device for passenger vehicles based on a flexible cable structure, provided in an embodiment of the present invention;

[0029] Figure 6 for Figure 5 A magnified view of region B in the image;

[0030] Figure 7 A schematic diagram of the flexible blade and blade slider in an active wheel hub device for passenger vehicles based on a flexible cable structure, provided for an embodiment of the present invention;

[0031] Figure 8 This is a schematic diagram of the worm gear and reel in an active hub device for passenger vehicles based on a flexible cable structure, provided as an embodiment of the present invention.

[0032] In the attached diagram: Hub 1; Spoke cavity 1-1; Spoke post 1-2; Ventilation opening 1-3; Drive compartment 1-4; Bolt hole 1-5; Countersunk hole 1-6; Battery compartment 1-7; First sinking channel 1-8; Motor compartment 1-9; Central cylinder 1-10; Control compartment 1-11; Second sinking channel 1-12; First slide rail 1-13; Flexible cable channel 1-14; Second slide rail 1-15; Cable inlet hole 1-16; Blade slider 2; First slider cable tying hole 2-1; Second… 2-2 slider cable hole; 3 flexible blade; 3-1 flexible ring belt; 3-2 reinforcing rod; 4 controller; 5 battery; 6 motor; 7 worm; 7-1 worm column; 7-2 worm gear; 8 reel; 8-1 first reel; 8-2 second reel; 8-3 pad; 8-4 worm wheel column; 8-5 worm wheel gear; 8-6 first reel cable hole; 8-7 second reel cable hole; 9 torsion spring; 10 frustum drum; 11 spoke cover plate; 12 center cover plate; 13 flexible cable. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0034] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0035] like Figures 1-8 As shown, an active wheel hub device for passenger vehicles based on a flexible cable structure is provided in one embodiment of the present invention, comprising:

[0036] A hub 1 is provided with a plurality of spokes in a circumferential direction, and a ventilation opening 1-3 is formed between adjacent spokes. A spoke cavity 1-1 is arranged in the hub 1 at a corresponding position of each spoke, and a fixed spoke column 1-2 is arranged in each spoke cavity 1-1. A torsion spring 9 is sleeved on the outside of the spoke column 1-2 and fixedly connected to one end of the torsion spring 9. A circular table drum 10 is arranged on the outside of the torsion spring 9 and fixedly connected to the other end of the torsion spring 9. A spoke cover plate 11 is arranged on the outside of the spoke cavity 1-1 to cover the spoke cavity 1-1.

[0037] A flexible shielding device is arranged corresponding to each ventilation opening 1-3, and one end of the flexible blade 3 is wound on the circular table drum 10. The flexible blade 3 includes a flexible ring belt 3-1 and a reinforcing rod 3-2 uniformly distributed in the radial direction of the hub 1. The flexible blade 3 is flexible in the winding direction to be wound or unwound, and is rigid in the radial direction through the reinforcing rod 3-2 to stably cover the ventilation opening 1-3 after being unfolded. A blade slider 2 is fixedly connected to the end of the flexible blade 3, and the blade slider 2 is provided with a first slider cable hole 2-1 and a second slider cable hole 2-2 at both ends.

[0038] A winding module is arranged in a driving cabin 1-4 arranged at the center of the hub 1 and includes a reel 8 and a driving unit for driving the reel 8 to rotate. The reel 8 is arranged on a center cylinder 1-10 arranged at the center of the driving cabin 1-4 and includes a first reel 8-1 and a second reel 8-2 arranged coaxially. A plurality of first reel cable holes 8-6 are arranged in a ring on the first reel 8-1, and a plurality of second reel cable holes 8-7 are arranged in a ring on the second reel 8-2. Each first reel cable hole 8-6 and second reel cable hole 8-7 is connected to a flexible cable 13. Each flexible cable 13 connected to the first reel cable hole 8-6 is connected to the first slider cable hole 2-1, and each flexible cable 13 connected to the second reel cable hole 8-7 is connected to the second slider cable hole 2-2.

[0039] The flexible cable 13 enters a flexible cable channel 1-14 through an entering cable hole 1-16 arranged on the driving cabin 1-4. The flexible cable channel 1-14 is in communication with a first sliding rail 1-13 and a second sliding rail 1-15, and the flexible cable 13 is connected to the first slider cable hole 2-1 and the second slider cable hole 2-2 on the blade slider 2 along the first sliding rail 1-13 and the second sliding rail 1-15.

[0040] The flexible blades 3 can be wound or unwound around the conical drum 10 under the traction of the flexible cable 13, so as to adjust the effective ventilation area of the ventilation openings 1-3. When no external force is applied, the elastic restoring force of the torsional spring 9 can make the conical drum 10 return to the initial state, so as to wind the flexible blades 3 to the conical drum 10, that is, to provide a return torque when the motor 6 is powered off or fails to drive, so that the flexible blades 3 return to the preset safe position.

[0041] In the embodiment of the present application, the ratio of the large end diameter and the small end diameter of the conical drum 10 matches the ratio of the radius of the first winding shaft 8-1 and the radius of the second winding shaft 8-2, so as to realize synchronous winding and uniform tension when the flexible cable 13 is wound.

[0042] As shown in Figure 1 and Figure 4 , as a preferred embodiment of the present application, the driving unit comprises a motor 6, the output end of the motor 6 is connected with a worm 7, the worm 7 is provided with worm teeth 7-2, the winding device 8 is provided with worm gear teeth 8-5 which are engaged with the worm teeth 7-2, and the worm gear teeth 8-5 are coaxially connected with the first winding shaft 8-1 through a worm column 8-4.

[0043] In the embodiment of the present application, when in use, only the motor 6 needs to be started, the motor 6 can drive the worm 7 to rotate, through the cooperation of the worm teeth 7-2 and the worm gear teeth 8-5, the worm 7 can drive the worm column 8-4 to rotate synchronously, so as to drive the first winding shaft 8-1 and the second winding shaft 8-2 to rotate synchronously.

[0044] As shown in Figure 1 and Figure 2 , as a preferred embodiment of the present application, the hub 1 is further provided with a center cover plate 12, the center cover plate 12 is used for closing the driving cabin 1-4, so as to ensure the structural integrity and protection.

[0045] As shown in Figure 8 , as a preferred embodiment of the present application, the winding device 8 further comprises a cushion table 8-3, the cushion table 8-3 is arranged on the side of the second winding shaft 8-2 away from the first winding shaft 8-1, and the top end of the cushion table 8-3 is in contact with the center cover plate 12, so as to isolate the second winding shaft 8-2 from the center cover plate 12.

[0046] As shown in Figure 4 and Figure 5 , as a preferred embodiment of the present application, the driving cabin 1-4 is further divided into a battery cabin 1-7, a motor cabin 1-9 and a control cabin 1-11, which are respectively used for fixedly mounting the battery 5, the motor 6 and the controller 4; the driving cabin 1-4 realizes electrical and wiring communication between the battery cabin 1-7, the motor cabin 1-9 and the control cabin 1-11 through a first sunken passage 1-8 and a second sunken passage 1-12.

[0047] In the embodiment of the present application, the winding module is provided with a position detection device, which is used to detect the opening degree of the flexible shielding device and feed back a detection signal to the controller 4 to realize closed-loop control.

[0048] As shown in Figure 5 and Figure 6 As a preferred embodiment of the present application, the central region of the hub 1 is provided with a plurality of bolt holes 1-5, and a counterbore 1-6 coaxial with the bolt holes 1-5 is machined near the end of the driving cabin 1-4 to accommodate connecting bolts and nuts, so as to reliably fix the hub 1 to the flange of the vehicle wheel shaft.

[0049] Working principle: In use, the controller 4 communicates with the vehicle control bus wirelessly to receive vehicle running state information, including vehicle speed, brake disc temperature and air dynamic demand signals. When the vehicle is running at high speed and the brake temperature is low, the controller 4 drives the motor 6 to rotate the worm column 7-1, which drives the winding reel 8 to rotate through the meshing of the worm teeth 7-2 and the worm gear teeth 8-5, winds the flexible cable 13, and pulls the blade slider 2 along the first sliding rail 1-13 and the second sliding rail 1-15 towards the center of the hub, so that the flexible blade 3 is unwound on the circular table winding drum 10 and gradually closes the ventilation opening 1-3 to reduce the aerodynamic resistance in the wheel area; when the vehicle brake temperature is high or needs to be enhanced, the controller 4 controls the motor 6 to release the flexible cable 13, and under the action of the return torque of the torsional spring 9, the flexible blade 3 is wound onto the circular table winding drum 10, opening the ventilation opening 1-3 to enhance the ventilation cooling of the brake system.

[0050] In addition, the controller 4 can also dynamically adjust the opening degree of the flexible shielding device according to the real-time temperature of the brake disc, the vehicle speed and the air dynamic demand of the whole vehicle, so as to form different effective ventilation areas at the ventilation opening 1-3, thereby adjusting the flow rate and heat exchange intensity of the air flowing through the brake. For example, when the brake temperature is at a medium level and the vehicle is running at a high speed, the controller 4 can only partially release the flexible cable 13, thereby providing a moderate amount of cooling air while reducing air resistance; when the vehicle is running at a low speed and the brake temperature continues to rise, the controller 4 can gradually wind the flexible blade 3 to increase the effective area of the ventilation opening 1-3, so as to achieve a higher heat dissipation and heat exchange rate. Through the above-mentioned control strategy of hierarchical and continuous adjustment, the vehicle air dynamic performance can be maximized while ensuring brake safety, and the energy efficiency and cooling demand under different working conditions can be considered.

[0051] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A passenger vehicle active wheel hub device based on a flexible cable structure, characterized by, The utility model relates to a kind of passenger car driving wheel hub device, including: Hub, the hub is provided with several spokes in circumferential direction, and ventilation opening is formed between adjacent spokes;The hub is provided with spoke cavity along the corresponding position of each spoke, and each spoke cavity is provided with fixed spoke column, the outer side of the spoke column is sleeved with torsion spring, and is fixedly connected with one end of torsion spring, the outer side of the torsion spring is installed circular table drum, and the other end of the circular table drum and torsion spring is fixedly connected; Flexible shielding device, the flexible shielding device includes flexible blade corresponding to each ventilation opening, and one end of the flexible blade is wound on the circular table drum, the flexible blade includes flexible ring belt and uniformly distributed reinforcing rod along the radial of hub, the end of the flexible blade is fixedly connected with blade slider, and the two ends of the blade slider are respectively provided with first slider cable hole and second slider cable hole; Winding module, the winding module is installed in the drive cabin arranged at the center of hub, including reel and the driving unit for driving reel to rotate, the reel is installed on the center cylinder arranged at the center of drive cabin, including coaxially arranged first reel and second reel, a plurality of first reel cable holes are arranged on the first reel, a plurality of second reel cable holes are arranged on the second reel, each first reel cable hole and second reel cable hole is connected with a flexible cable, each flexible cable connected with first reel cable hole is connected with each first slider cable hole, and each flexible cable connected with second reel cable hole is connected with each second slider cable hole; The flexible cable enters the flexible cable channel through the cable inlet hole arranged on the drive cabin, the flexible cable channel is communicated with the first sliding rail and the second sliding rail, and the flexible cable is connected with the first slider cable hole and the second slider cable hole on the blade slider along the first sliding rail and the second sliding rail.

2. The flexible cable structure based passenger vehicle active wheel hub arrangement as claimed in claim 1, wherein, The driving unit includes motor, the output end of the motor is connected with worm, the worm is provided with worm gear, the reel is provided with worm gear teeth meshing with worm gear, and the worm gear teeth are coaxially connected with the first reel through worm column.

3. The flexible cable structure based passenger vehicle active wheel hub arrangement as claimed in claim 1, wherein, The hub is also provided with a center cover plate for closing the drive cabin.

4. The flexible cable structure based passenger vehicle active wheel hub arrangement as claimed in claim 3, wherein, The reel also includes a cushion, which is arranged on the side of the second reel away from the first reel, and the top end of the cushion is in contact with the center cover plate to isolate the second reel from the center cover plate.

5. The flexible cable structure based passenger vehicle active wheel hub arrangement as claimed in claim 1, wherein, The drive cabin is also divided into battery cabin, motor cabin and control cabin for fixedly installing battery, motor and controller respectively;The electrical and wiring communication between the battery cabin, the motor cabin and the control cabin is realized through the first subsidence channel and the second subsidence channel in the drive cabin.

6. The cable-based structure based passenger vehicle active wheel hub arrangement as claimed in claim 1, wherein, The ratio of the large end diameter to the small end diameter of the circular table drum matches the ratio of the first reel radius to the second reel radius.

7. A flexible cable structure based passenger vehicle active wheel hub arrangement as claimed in any one of claims 1 to 6, wherein, The control method of the passenger car driving wheel hub device includes the following steps: Step 1: collect vehicle operating state information, the vehicle operating state information includes at least brake disc temperature and / or vehicle speed; Step 2: transmit the vehicle operating state information to the controller; Step 3: The controller outputs a control signal according to a preset control strategy, drives the motor to rotate, and the motor drives the reel to rotate through the worm, so as to drive the first reel and the second reel to wind or unwind the flexible cable; Step 4: The winding or unwinding of the flexible cable drives the flexible shielding device to expand or wind at the ventilation opening, so as to adjust the effective ventilation area of the ventilation opening, and realize the dynamic balance of the air resistance and the brake heat dissipation performance of the vehicle.

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