A double wishbone independent suspension front wheel assembly

Abstract

The utility model provides a kind of double fork arm independent suspension type front wheel component, including mounting seat, front wheel, upper fork arm, lower fork arm, shock absorber, wheel hub, anti-roll bar and steering rod, one end of upper fork arm and lower fork arm is connected with wheel hub hinged through first ball hinge connecting piece, the other end of lower fork arm is hinged with mounting seat through linkage shaft, shock absorber lower end is hinged with lower fork arm through swing arm, the other end of upper fork arm and shock absorber is used for being connected with the frame of electric wheelchair, front wheel is connected with wheel hub, steering rod both ends are hinged with wheel hub through second ball hinge connecting piece.The utility model has the beneficial effects: connect through anti-roll bar swing arm, avoid chassis component interference, release chassis space;Floating groove cooperates with rotating fulcrum, reduce vibration conduction, improve comfort;Double fork arm length difference cooperates with sensor, optimize wheel positioning, reduce tire eccentric wear, torque sensor realizes dynamic stiffness adjustment, reduce over-bend roll, improve control stability.

Description

Technical Field

[0001] This utility model mainly relates to the field of electric wheelchair technology, specifically to a double wishbone independent suspension front wheel assembly. Background Technology

[0002] In the technological development of electric wheelchairs, the suspension system is the core component that ensures riding comfort and driving stability. Traditional electric wheelchairs mostly follow the design concept of double wishbone suspension in the automotive field, directly connecting the anti-roll bar between the wheel hub and the chassis.

[0003] The traditional structure of the aforementioned anti-roll bar has revealed many problems in practical applications: On the one hand, the anti-roll bar runs through the space under the chassis, creating a layout conflict with core components such as the battery pack and drive motor. This not only compresses the limited installation space of the chassis but also increases the difficulty of assembly and maintenance costs. On the other hand, the rigidly connected anti-roll bar transmits road vibrations to the frame without buffering, directly affecting the user's riding experience. For people with mobility impairments, this vibration impact may cause physical discomfort or even safety hazards. The traditional structure directly constrains the movement of the wheel hub, resulting in a decrease in the shock absorption performance and wheel positioning accuracy of the double wishbone suspension, making it difficult to meet the special needs of electric wheelchairs for low-speed, high-frequency steering and driving on complex road surfaces.

[0004] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art. Utility Model Content

[0005] 1. The technical problem to be solved by the utility model:

[0006] This utility model provides a double wishbone independent suspension front wheel assembly to solve the technical problems existing in the background art.

[0007] 2. Technical Solution:

[0008] To achieve the above objectives, the technical solution provided by this utility model is as follows: a double wishbone independent suspension front wheel assembly, including a mounting base, a front wheel, an upper wishbone, a lower wishbone, a shock absorber, a wheel hub, an anti-roll bar, and a steering rod. The mounting base is used to fix and connect to the frame of an electric wheelchair. One end of the upper wishbone and the lower wishbone are both hinged to the wheel hub via a first ball joint connector. The other end of the lower wishbone is hinged to the mounting base via a linkage shaft. The lower end of the shock absorber is hinged to the lower wishbone via a swing arm. The other ends of the upper wishbone and the shock absorber are both used to connect to the frame of the electric wheelchair. The front wheel is connected to the wheel hub. Both ends of the steering rod are hinged to the wheel hub via second ball joint connectors.

[0009] Furthermore, the wheel hub is provided with a first cantilever rod and a second cantilever rod corresponding to the upper fork arm and the lower fork arm, the first cantilever rod extending upward and having a height greater than the height of the front wheel.

[0010] Furthermore, the cantilever rod is provided with ear plates on both sides, and an extension arm is provided at the lower end of one of the ear plates.

[0011] Furthermore, the extension arm, the ear plate, the first cantilever rod, and the second cantilever rod are all integrally formed with the wheel hub, and the two ends of the steering rod are hinged to the extension arm through the second ball joint connector.

[0012] Furthermore, the anti-roll bar includes two mirror-arranged L-shaped connecting rods, with both ends of the anti-roll bar rotatably connected to the ear plate and the swing arm, respectively. A floating groove is provided at the end of the anti-roll bar near the swing arm, and a torque sensor is also provided on the anti-roll bar.

[0013] Furthermore, the upper and lower ends of the swing arm are respectively hinged to the shock absorber and the lower fork arm, and the connection between the swing arm and the shock absorber has a rotation fulcrum, which is slidably connected along the floating groove.

[0014] Furthermore, both the upper fork and the lower fork are equipped with angle sensors, and the length of the upper fork is shorter than the length of the lower fork.

[0015] 3. Beneficial effects:

[0016] Compared with the prior art, the technical solution provided by this utility model has the following advantages:

[0017] The anti-roll bar is linked to the wheel hub and shock absorber via the swing arm, avoiding interference with the chassis battery and motor by the traditional structure and freeing up chassis space;

[0018] The sliding engagement between the floating groove and the rotating pivot reduces the efficiency of road vibration transmission. Combined with the optimized shock absorber angle, the ride comfort is significantly improved. The torque sensor provides real-time feedback on the anti-roll bar force, enabling dynamic stiffness adjustment, reducing the cornering tilt angle, and comprehensively optimizing the electric wheelchair's passability and handling stability.

[0019] It should be noted that the structures not described in this utility model are the same as or can be implemented using existing technology, and will not be elaborated here, as they do not involve the design points and improvement directions of this utility model. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a partial structural schematic diagram of the present invention;

[0022] Figure 3 This is a schematic diagram of the hub structure of this utility model.

[0023] Figure label:

[0024] 1. Mounting bracket; 2. Front wheel; 3. Upper wishbone; 4. Lower wishbone; 5. Shock absorber; 6. Wheel hub; 7. Anti-roll bar; 701. Floating groove; 8. Steering rod; 9. First ball joint connector; 10. Swing arm; 11. Second ball joint connector; 12. Cantilever rod one; 13. Cantilever rod two; 14. Ear plate; 15. Extension arm; 16. Rotation pivot. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "fixed," "provided with," and "located in" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] See attached document Figure 1-3 A double wishbone independent suspension front wheel assembly includes a mounting base 1, a front wheel 2, an upper wishbone 3, a lower wishbone 4, a shock absorber 5, a wheel hub 6, an anti-roll bar 7, and a steering rod 8. The mounting base 1 is used to fix the assembly to the frame of an electric wheelchair. One end of both the upper wishbone 3 and the lower wishbone 4 is hinged to the wheel hub 6 via a first ball joint connector 9. The other end of the lower wishbone 4 is hinged to the mounting base 1 via a linkage shaft. The lower end of the shock absorber 5 is hinged to the lower wishbone 4 via a swing arm 10. The other ends of both the upper wishbone 3 and the shock absorber 5 are used to connect to the frame of the electric wheelchair. The front wheel 2 is connected to the wheel hub 6. Both ends of the steering rod 8 are hinged to the wheel hub 6 via second ball joint connectors 11. 1. As a core connecting component, its shape is adapted to the mounting interface of the electric wheelchair frame. It is made of high-strength alloy material and is precisely fixed to the frame through multiple positioning holes to ensure a stable connection between the entire front wheel assembly and the frame. The front wheel 2 is the key component that supports the electric wheelchair's forward movement and is in direct contact with the ground. The upper wishbone 3 and lower wishbone 4 are the main load-bearing structures of the suspension system. Together with the shock absorber 5, they bear the impact and pressure from the road surface. The wheel hub 6 is the hub connecting the front wheel 2 with other suspension components. The anti-roll bar 7 is an innovative design component used to improve the lateral stability of the vehicle when driving. The steering rod 8 is responsible for transmitting steering power to realize the steering action of the front wheel 2.

[0030] Mounting seat 1 is used to fix the electric wheelchair to the frame. One end of the upper fork arm 3 and the lower fork arm 4 are both hinged to the wheel hub 6 through the first ball joint connector 9. The other end of the lower fork arm 4 is hinged to the mounting seat 1 through the linkage shaft. The mounting seat 1 is fixed at the front bottom of the frame. Its position is calculated by mechanics and is located in the projection area of ​​the vehicle's center of gravity to ensure uniform force distribution. The upper fork arm 3 and the lower fork arm 4 are distributed in a V-shape. The upper fork arm 3 is located above the front wheel 2 and the lower fork arm 4 is located below the front wheel 2. The two are connected to the wheel hub 6 at multiple angles through the first ball joint connector 9, allowing the wheel hub 6 to swing freely in the vertical direction and a certain horizontal direction to adapt to complex road conditions. The other end of the lower fork arm 4 is hinged to the mounting seat 1 through the linkage shaft. When the lower fork arm 4 moves up and down with the wheel hub 6, it can rotate around the linkage shaft and transmit the force to the mounting seat 1, and then distribute it to the frame.

[0031] The lower end of the shock absorber 5 is hinged to the lower fork arm 4 via the swing arm 10. The other end of the upper fork arm 3 and the shock absorber 5 are both used to connect to the frame of the electric wheelchair. The upper end of the shock absorber 5 is connected to the frame, and the lower end is connected to the lower fork arm 4 via the swing arm 10. A certain degree of tilting and swinging can be achieved through the swing arm 10. The swing arm 10 is installed on the side of the lower fork arm 4 near the wheel hub 6. One end of the swing arm 10 is hinged to the lower fork arm 4, and the other end is hinged to the lower end of the shock absorber 5. This connection method makes the force direction of the shock absorber 5 no longer completely parallel to the direction of wheel movement, but forms a certain angle. When the vehicle is driving on a bumpy road, the wheel hub 6 drives the lower fork arm 4 to move up and down, and the swing arm 10 swings accordingly, causing the shock absorber 5 to compress or stretch, effectively absorbing road vibration. At the same time, through a special angle design, the shock absorption effect of the shock absorber 5 is optimized, reducing the vibration transmitted to the frame.

[0032] The front wheel 2 is connected to the hub 6, which is located at the center of the front wheel 2 and is connected to the axle through a bearing, allowing the front wheel 2 to rotate freely. The hub 6 is made of lightweight and high-strength material, and its outer surface is designed with mounting grooves to fit the front wheel 2. The front wheel 2 is fastened to the hub 6 with bolts to ensure that the two are tightly connected and rotate synchronously during vehicle operation.

[0033] Both ends of the steering rod 8 are hinged to the wheel hub 6 via the second ball joint connector 11. The steering rod 8 is arranged laterally behind the front wheel 2. One end of the steering rod is hinged to the extension arm 15 on one side of the wheel hub 6 via the second ball joint connector 11, and the other end is hinged to the corresponding part of the wheel hub 6 on the other side. When the electric wheelchair is turned, the steering motor drives the steering rod 8 to move. Due to the presence of the second ball joint connector 11, the steering rod 8 can rotate flexibly in multiple directions, accurately transmitting the steering force to the wheel hub 6, so that the front wheel 2 rotates in the predetermined direction, achieving precise steering.

[0034] The wheel hub 6 is equipped with a first cantilever rod 12 and a second cantilever rod 13 corresponding to the upper wishbone 3 and the lower wishbone 4. The first cantilever rod 12 extends upward and is higher than the height of the front wheel 2. The first cantilever rod 12 and the second cantilever rod 13 extend vertically from the side of the wheel hub 6. The first cantilever rod 12 is located at the corresponding position of the upper wishbone 3 and extends upward to a height higher than the front wheel 2. Its main function is to provide a connection fulcrum for the upper wishbone 3 and the anti-roll bar 7, and at the same time enhance the structural strength of the wheel hub 6 in the vertical direction. The second cantilever rod 13 is located at the corresponding position of the lower wishbone 4 and is used to connect the lower wishbone 4, assist in transmitting the road force, and ensure a stable connection between the wheel hub 6 and the double wishbone.

[0035] The cantilever rod 12 is also provided with ear plates 14 on both sides. One of the ear plates 14 has an extension arm 15 at its lower end. The extension arm 15, ear plates 14, cantilever rod 12 and cantilever rod 2 13 are all integrally formed with the wheel hub 6. The two ends of the steering rod 8 are hinged to the extension arm 15 through the second ball joint connector 11. The ear plates 14 are symmetrically distributed on both sides of the cantilever rod 12 to provide an installation position for the anti-roll bar 7 and enhance the connection stability. The extension arm 15 extends horizontally outward from the lower end of the ear plate 14 and has a hinge hole at its end. It is hinged to the steering rod 8 through the second ball joint connector 11. The integrally formed structure ensures the strength and integrity between these components and the wheel hub 6, avoids structural failure caused by loose connection parts, and simplifies the assembly process.

[0036] The anti-roll bar 7 includes two mirror-shaped L-shaped links. The two ends of the anti-roll bar 7 are rotatably connected to the ear plate 14 and the swing arm 10, respectively. A floating groove 701 is provided at the end of the anti-roll bar 7 near the swing arm 10. A torque sensor is also provided on the anti-roll bar 7. The two L-shaped links form the anti-roll bar 7. One end of the anti-roll bar 7 is hinged to the ear plate 14 through a rotating connector, and the other end is connected to the swing arm 10. The floating groove 701 at the connection end is fitted onto the rotation fulcrum 16 at the connection between the swing arm 10 and the shock absorber 5. When the vehicle turns and tilts, the vertical displacement of the two wheels is different, which causes the L-shaped link of the anti-roll bar 7 to twist. This torsional force suppresses the body roll. The design of the floating groove 701 ensures that the anti-roll bar 7 does not rigidly constrain the normal movement of the swing arm 10 and the shock absorber 5 when it is working, thus avoiding interference with the chassis components. The torque sensor monitors the force on the anti-roll bar 7 in real time and feeds the data back to the vehicle control system so that the effect of the anti-roll bar 7 can be dynamically adjusted according to the actual road conditions and driving status.

[0037] The upper and lower ends of the swing arm 10 are hinged to the shock absorber 5 and the lower fork arm 4, respectively. The connection between the swing arm 10 and the shock absorber 5 has a pivot point 16, which slides along the floating groove 701. As a key component connecting the shock absorber 5, the lower fork arm 4 and the anti-roll bar 7, the upper end of the swing arm 10 is hinged to the lower end of the shock absorber 5 and the lower end is hinged to the lower fork arm 4. During vehicle operation, when the lower fork arm 4 moves up and down with the wheel hub 6, the swing arm 10 rotates around the hinge point with the lower fork arm 4, thereby driving the shock absorber 5 to work. The sliding of the pivot point 16 in the floating groove 701 allows the connection between the anti-roll bar 7 and the swing arm 10 to have a certain degree of freedom. This ensures the force transmission of the anti-roll bar 7 when suppressing roll, without restricting the normal movement of the swing arm 10 and the shock absorber 5. This effectively avoids the problem of direct vibration transmission and component interference caused by the direct connection of the anti-roll bar to the wheel hub and the frame in traditional structures.

[0038] Angle sensors are installed on both the upper wishbone 3 and the lower wishbone 4. The upper wishbone 3 is shorter than the lower wishbone 4. The angle sensors are installed near the hinge point on the upper wishbone 3 and the lower wishbone 4 to monitor the swing angle of the double wishbone in real time and feed the data back to the vehicle control system. This data is used to analyze the working status of the vehicle suspension system and the road conditions for adaptive adjustment. The design that the upper wishbone 3 is shorter than the lower wishbone 4 allows the double wishbone to form a specific motion trajectory during movement, optimize wheel alignment parameters, and reduce tire wear. At the same time, in conjunction with the anti-roll bar 7 and the shock absorber 5, it improves the vehicle's driving stability and handling performance under different road conditions.

[0039] In summary, this double wishbone independent suspension front wheel assembly, designed to meet the needs of electric wheelchair users, effectively solves problems such as interference with chassis components, direct vibration transmission to the frame, and constraint of wheel hub movement caused by traditional anti-roll bar structures. This is achieved through optimized connection methods between the mounting base and components like the double wishbone, shock absorbers, and steering rods, as well as special structural designs for key components such as the wheel hub and anti-roll bar. It not only achieves excellent anti-roll effect but also optimizes shock absorption performance and steering precision. Furthermore, real-time monitoring and feedback via sensors enhance the adaptive adjustment capability of the suspension system, thereby comprehensively improving the riding comfort, structural stability, and handling performance of the electric wheelchair.

[0040] The above-described embodiments are merely illustrative of certain implementations of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A double wishbone independent suspension front wheel assembly, characterized in that: The wheelchair includes a mounting base (1), a front wheel (2), an upper fork arm (3), a lower fork arm (4), a shock absorber (5), a wheel hub (6), an anti-roll bar (7), and a steering rod (8). The mounting base (1) is used to fix the wheelchair to the frame. One end of the upper fork arm (3) and the lower fork arm (4) are hinged to the wheel hub (6) through a first ball joint connector (9). The other end of the lower fork arm (4) is hinged to the mounting base (1) through a linkage shaft. The lower end of the shock absorber (5) is hinged to the lower fork arm (4) through a swing arm (10). The other end of the upper fork arm (3) and the shock absorber (5) are used to connect to the frame of the wheelchair. The front wheel (2) is connected to the wheel hub (6). Both ends of the steering rod (8) are hinged to the wheel hub (6) through a second ball joint connector (11).

2. The double wishbone independent suspension front wheel assembly according to claim 1, characterized in that: The wheel hub (6) is provided with a first cantilever rod (12) and a second cantilever rod (13) corresponding to the upper fork arm (3) and the lower fork arm (4). The first cantilever rod (12) extends upward and its height is greater than that of the front wheel (2).

3. The double wishbone independent suspension front wheel assembly according to claim 2, characterized in that: The cantilever rod (12) is also provided with ear plates (14) on both sides, and an extension arm (15) is provided at the lower end of one of the ear plates (14).

4. A double wishbone independent suspension front wheel assembly according to claim 3, characterized in that: The extension arm (15), the ear plate (14), the first cantilever rod (12) and the second cantilever rod (13) are all integrally formed with the wheel hub (6). The two ends of the steering rod (8) are hinged to the extension arm (15) through the second ball joint connector (11).

5. A double wishbone independent suspension front wheel assembly according to claim 3, characterized in that: The anti-roll bar (7) includes two mirror-arranged L-shaped connecting rods. The two ends of the anti-roll bar (7) are rotatably connected to the ear plate (14) and the swing arm (10) respectively. A floating groove (701) is provided at one end of the anti-roll bar (7) near the swing arm (10). A torque sensor is also provided on the anti-roll bar (7).

6. A double wishbone independent suspension front wheel assembly according to claim 5, characterized in that: The upper and lower ends of the swing arm (10) are hinged to the shock absorber (5) and the lower fork arm (4) respectively. The connection between the swing arm (10) and the shock absorber (5) has a rotation fulcrum (16), and the rotation fulcrum (16) is slidably connected along the floating groove (701).

7. A double wishbone independent suspension front wheel assembly according to claim 1, characterized in that: Angle sensors are provided on both the upper fork (3) and the lower fork (4), and the length of the upper fork (3) is less than the length of the lower fork (4).

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