A chassis structure of an electric wheelchair with four-wheel independent damping

Abstract

The utility model relates to electric wheelchair technology field, and disclose a kind of four-wheel independent shock-absorbing electric wheelchair chassis structure, the four-wheel independent shock-absorbing structure is used to the shortcoming of existing electric wheelchair, independent connecting rod shock-absorbing structure is equipped for each wheel, two groups of steering support wheel are respectively independently installed in the front two sides of alloy frame by steering shock-absorbing arm cooperation first shock absorber support, two groups of mobile drive wheel are respectively independently installed in the rear two sides of alloy frame by mobile shock-absorbing arm, trailing arm cooperation second shock absorber support, shock-absorbing mechanism structure is simple and compact layout, make full use of the inside space of frame, it has better layout compactness and structural maintenance convenience, by independent steering shock-absorbing arm and mobile shock-absorbing arm cooperation shock absorber respectively to steering support wheel and mobile drive wheel independently shock-absorbing support, so that the up and down vibration of single wheel does not affect other wheels, to provide better ride comfort and chassis stability.

Description

Technical Field

[0001] This utility model relates to the field of electric wheelchair technology, specifically to an electric wheelchair chassis structure with four-wheel independent shock absorption. Background Technology

[0002] Electric wheelchairs are important mobility tools mainly used for home rehabilitation, transportation, medical treatment, and outdoor activities for the injured, sick, and disabled. They are upgraded versions of traditional manual wheelchairs by adding high-performance power drive devices, intelligent control devices, batteries, and other components. These new-generation intelligent wheelchairs have multiple functions such as forward movement, backward movement, turning, standing, and lying down. The user operates the control lever, which provides kinetic energy to the drive system to move the wheelchair. Compared to traditional wheelchairs, electric wheelchairs have better operation and ease of use.

[0003] As the walking support structure of an electric wheelchair, the chassis structure plays a crucial role in the working stability of the wheelchair. In terms of structure, existing electric wheelchairs generally lack shock absorption or have shock absorption but the left and right wheels are not independent. They are only rigidly connected by a crossbeam. When one wheel is bumped, the other wheel will also be affected, which will aggravate the left and right sway of the entire vehicle body, resulting in poor comfort and support stability. Therefore, an electric wheelchair chassis structure with four-wheel independent shock absorption is proposed. Utility Model Content

[0004] The purpose of this invention is to provide an electric wheelchair chassis structure with four-wheel independent shock absorption to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electric wheelchair chassis structure with four-wheel independent shock absorption, including an alloy frame, a battery compartment seat, and a shock absorption support mechanism. The battery compartment seat is supported and installed in the middle of the alloy frame, and the shock absorption support mechanism is used for the overall walking support of the alloy frame. The shock absorption support mechanism includes a steering support wheel, a steering damping arm, a first shock absorber, a moving drive wheel, a moving damping arm, a second shock absorber, a trailing arm, and a drive motor. The two sets of steering support wheels are independently mounted on the front sides of the alloy frame through the steering damping arm and the first shock absorber. The two sets of moving drive wheels are independently mounted on the rear sides of the alloy frame through the moving damping arm, the trailing arm, and the second shock absorber. The drive motor is mounted on the side of the moving damping arm for driving the moving drive wheel.

[0006] Preferably, the battery compartment is a covered box-shaped structure, and the battery compartment is fixedly installed to the middle support of the alloy frame by bolts.

[0007] Preferably, the alloy frame is provided with hinged supports on both front sides. The rear of the two sets of steering damping arms are respectively hinged to the front sides of the alloy frame through the hinged supports. The first shock absorber is supported and installed on the upper flip-angle side of the steering damping arm.

[0008] Preferably, the front of the aforementioned steering damping arm is provided with a pivot support, and a steering bracket is rotatably mounted on the lower part of the pivot support. The steering support wheel is rotatably mounted on the lower part of the steering bracket via the pivot support.

[0009] Preferably, the alloy frame is provided with hinged supports on both sides and rear, and the front of the two sets of movable shock absorbers are respectively hinged to the rear sides of the alloy frame through the hinged supports. The second shock absorber is supported and installed on the upper flip angle side of the movable shock absorber.

[0010] Preferably, a support arm bracket is fixedly installed on the rear center of the alloy frame. The trailing arms are arranged in pairs, and the two ends of the trailing arms are respectively connected and installed to the rear side of the movable shock absorber arm and the support arm bracket via ball joint brackets.

[0011] Preferably, a reducer is fixedly installed on the lower part of the aforementioned movable shock absorber arm, the drive motor is fixedly installed on the front drive side of the reducer by bolts, the drive motor is fixedly installed on the drive input shaft end of the reducer, a wheel mounting plate is fixedly installed on the drive output shaft end of the reducer, and the movable drive wheel is fixedly installed on the wheel mounting plate by bolts.

[0012] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects: To address the shortcomings of existing electric wheelchairs, this chassis structure adopts a four-wheel independent shock absorption structure, equipping each wheel with an independent linkage shock absorption structure. The shock absorption mechanism has a simple and compact layout, making full use of the internal space of the frame, and has good layout compactness and structural maintenance convenience. Through independent steering shock absorption arms and moving shock absorption arms, in conjunction with shock absorbers, the steering support wheel and moving drive wheel are independently damped and supported, so that the up-and-down vibration of a single wheel will not affect other wheels, thereby providing better riding comfort and chassis stability. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1This is a three-dimensional structural diagram of the overall installation front side of this utility model; Figure 2 This is a schematic diagram of the overall three-dimensional structure of the present invention after installation; Figure 3 This is a schematic diagram of the front structure of the shock-absorbing support mechanism of this utility model during operation. Figure 4 This is a schematic diagram of the rear structure of the shock-absorbing support mechanism of this utility model after it is installed in operation. Figure 5 This is a schematic diagram of the mobile drive wheel installation structure of this utility model.

[0015] Explanation of reference numerals in the attached drawings: 1. Alloy frame; 2. Battery compartment seat; 3. Steering support wheel; 4. Steering shock absorber arm; 5. First shock absorber; 6. Moving drive wheel; 7. Moving shock absorber arm; 8. Second shock absorber; 9. Trailing arm; 10. Drive motor; 11. Outrigger support; 12. Reducer; 13. Wheel mounting plate. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] It should be noted that the structures, proportions, sizes, etc., shown in the accompanying drawings of this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed in the specification, and are not intended to limit the conditions under which this application can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size should still fall within the scope of the technical content disclosed in this application, provided that they do not affect the effects and purposes that this application can produce.

[0018] Example Please see Figure 1-5 This utility model provides a technical solution: an electric wheelchair chassis structure with four-wheel independent shock absorption, including an alloy frame 1, a battery compartment seat 2, and a shock absorption support mechanism. The alloy frame 1 can be made of aluminum alloy, which has good structural strength and low structural mass, reducing the structural mass of the vehicle body while ensuring the structural strength of the chassis. The battery compartment seat 2 is used for battery installation and protection, as shown in the attached figure. Figure 1 As shown, the battery compartment 2 is a covered box-shaped structure made of fire-resistant plastic. The battery compartment 2 is fixedly installed to the middle support of the alloy frame 1 by bolts, and is used for the installation and protection of the lithium battery pack.

[0019] The shock-absorbing support mechanism is used for the overall running support of the alloy frame 1. The shock-absorbing support mechanism includes a steering support wheel 3, a steering shock absorber arm 4, a first shock absorber 5, a moving drive wheel 6, a moving shock absorber arm 7, a second shock absorber 8, a trailing arm 9, and a drive motor 10. The two sets of steering support wheels 3 are independently mounted on both sides of the front of the alloy frame 1, supported by the steering shock absorber arm 4 and the first shock absorber 5. Specifically, see attached... Figure 3 As shown, to facilitate the connection and installation of the steering shock absorber arm 4, hinged supports are provided on both front sides of the alloy frame 1. The rear parts of the two sets of steering shock absorber arms 4 are hinged to the front sides of the alloy frame 1 respectively through the hinged supports. The first shock absorber 5 is a spring-type shock absorber. The two ends of the first shock absorber 5 are hinged to the steering shock absorber arm 4 and the alloy frame 1 respectively through the hinge structure. The first shock absorber 5 is supported and installed on the upper side of the steering shock absorber arm 4 at an angle. The shock absorber support can absorb the impact force transmitted by the steering shock absorber arm 4 to achieve shock absorption and protection. To facilitate the connection and installation of the steering support wheel 3, a pivot support is provided on the front of the steering shock absorber arm 4. A steering bracket is fixedly and rotatably installed on the lower part of the pivot support. The steering support wheel 3 is fixedly and rotatably installed on the lower part of the steering bracket through the pivot support. The steering support wheel 3 can rotate freely for the movement and steering support of the wheelchair.

[0020] Two sets of movable drive wheels 6 are independently mounted on both sides of the rear of the alloy frame 1, supported by movable shock absorber arms 7 and trailing arms 9 in conjunction with the second shock absorber 8. See attached diagram for details. Figure 4 As shown, to facilitate the connection and installation of the movable shock absorber arms 7, hinged supports are provided on both sides and rear of the alloy frame 1. The front parts of the two sets of movable shock absorber arms 7 are hinged to the rear sides of the alloy frame 1 through the hinged supports. The second shock absorber 8 is a spring-type shock absorber. The two ends of the second shock absorber 8 are hinged to the movable shock absorber arms 7 and the alloy frame 1 through the hinged support structure. The second shock absorber 8 is supported and installed on the upper flip angle side of the movable shock absorber arms 7. The shock absorber support can absorb the impact force transmitted by the movable shock absorber arms 7 to achieve shock absorber support protection. A four-wheel independent shock absorber structure is adopted, with each wheel equipped with an independent linkage shock absorber structure. The shock absorber structure is simple and compact, making full use of the inner space of the frame. It has good layout compactness and structural maintenance convenience. The independent steering shock absorber arm 4 and the movable shock absorber arm 7 work together with the shock absorber to provide independent shock absorber support for the steering support wheel 3 and the movable drive wheel 6, so that the up and down vibration of a single wheel will not affect other wheels, thereby providing better ride comfort and chassis stability.

[0021] To further improve the shock absorption and stability of the mobile drive wheel 6, as shown in the attached... Figure 4As shown, a support arm bracket 11 is fixedly installed in the middle of the rear side of the alloy frame 1. The trailing arms 9 are arranged in pairs. The two ends of the trailing arms 9 are connected to the rear side of the movable shock absorber arm 7 and the support arm bracket 11 respectively through ball joint brackets to form a swing arm type support structure.

[0022] The drive motor 10 is mounted on the side of the movable shock absorber arm 7 to drive the movable drive wheel 6. Specifically, see attached... Figure 5 As shown, in order to achieve stable transmission of driving force, a reducer 12 is fixedly installed on the lower part of the movable shock absorber arm 7. The drive motor 10 is fixedly installed on the front drive side of the reducer 12 by bolts. The drive motor 10 is fixedly installed on the drive input shaft end of the reducer 12. The drive output shaft end of the reducer 12 is fixedly installed with a wheel mounting plate 13. The movable drive wheel 6 is fixedly installed on the wheel mounting plate 13 by bolts. Under the drive of the drive motor 10, the power transmission of the reducer 12 can realize the stable rotation drive of the movable drive wheel 6.

[0023] Working principle or structural principle: During operation, two sets of drive motors 10, in conjunction with reducer 12, drive two sets of movable drive wheels 6 independently. When moving in a straight line, the two sets of drive motors 10 work synchronously to achieve straight-line driving of the wheelchair. When turning, the two sets of drive motors 10 work asynchronously, and the turning and turning of the wheelchair is achieved through the rotation difference of the two sets of movable drive wheels 6 and the universal support of the steering support wheel 3. During operation, when encountering uneven surfaces or obstacles, the two steering support wheels 3 are each connected to the alloy frame 1 via an independent, vertically swinging steering damping arm 4. The steering damping arm 4 and the alloy frame 1 are supported and connected by a first shock absorber 5. When contacting an obstacle, the left and right steering support wheels 3 can independently move up and down to provide shock absorption support to the front of the base. Furthermore, the two sets of steering support wheels 3 operate independently; the movement of one steering support wheel 3 will not affect the other, achieving independent shock absorption. Similarly, the two moving drive wheels 6 are each connected to the alloy frame 1 via an independent, vertically swinging steering damping arm 4. The movable shock-absorbing arm 7 and the trailing arm 9 are connected to the alloy frame 1. A second shock absorber 8 is installed between the movable shock-absorbing arm 7 and the alloy frame 1. When contacting an obstacle, the movable drive wheels 6 on the left and right sides can move up and down independently to achieve shock absorption support for the rear of the base. The two sets of movable drive wheels 6 work independently. The movement of one movable drive wheel 6 will not affect the other steering support wheel 3, thus achieving independent shock absorption. Through the independent shock absorption support of the steering support wheel 3 and the movable drive wheel 6, the walking vibration can be reduced while the large displacement and shaking of the base structure can be effectively reduced, thereby effectively improving the riding comfort and chassis stability of the wheelchair.

[0024] In summary, addressing the shortcomings of existing electric wheelchairs, this chassis structure adopts a four-wheel independent shock absorption structure, equipping each wheel with an independent linkage shock absorption structure. The shock absorption mechanism has a simple and compact structure, making full use of the internal space of the frame, and has good layout compactness and structural maintenance convenience. Through independent steering shock absorption arm 4 and moving shock absorption arm 7, in conjunction with shock absorbers, the steering support wheel 3 and the moving drive wheel 6 are independently damped and supported, so that the up-and-down vibration of a single wheel will not affect other wheels, thereby providing better riding comfort and chassis stability.

[0025] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways, even if such combinations or combinations are not explicitly described in this utility model. In particular, the features described in the various embodiments and / or claims of this utility model can be combined or combined in various ways without departing from the spirit and teachings of this utility model. All such combinations and / or combinations fall within the scope of this utility model.

Claims

1. A chassis structure for an electric wheelchair with four-wheel independent shock absorption, comprising an alloy frame (1), a battery compartment seat (2), and a shock-absorbing support mechanism, characterized in that: The battery compartment seat (2) is supported and installed in the middle of the alloy frame (1), and the shock absorption support mechanism is used for the overall walking support of the alloy frame (1). The shock absorption support mechanism includes a steering support wheel (3), a steering shock absorber arm (4), a first shock absorber (5), a moving drive wheel (6), a moving shock absorber arm (7), a second shock absorber (8), a trailing arm (9), and a drive motor (10). The two sets of steering support wheels (3) are independently installed on the front sides of the alloy frame (1) with the support of the steering shock absorber arm (4) and the first shock absorber (5). The two sets of moving drive wheels (6) are independently installed on the rear sides of the alloy frame (1) with the support of the moving shock absorber arm (7), the trailing arm (9), and the second shock absorber (8). The drive motor (10) is installed on the side of the moving shock absorber arm (7) for driving the moving drive wheel (6). The alloy frame (1) is provided with hinged supports on both sides of the front. The rear of the two sets of steering damping arms (4) are respectively hinged to the front sides of the alloy frame (1) through the hinged supports. The first shock absorber (5) is supported and installed on the upper side of the steering damping arm (4) at the angle of rotation. The alloy frame (1) is provided with hinged supports on both sides and rear. The front of the two sets of movable shock absorbers (7) are respectively hinged to the rear sides of the alloy frame (1) through the hinged supports. The second shock absorber (8) is supported and installed on the upper flip angle side of the movable shock absorber (7). The alloy frame (1) is fixedly installed with a support arm bracket (11) at the rear center. The trailing arms (9) are arranged in pairs. The two ends of the trailing arms (9) are connected to the rear side of the movable shock absorber arm (7) and the support arm bracket (11) respectively through ball joint brackets.

2. The chassis structure of an electric wheelchair with four-wheel independent shock absorption according to claim 1, characterized in that: The battery compartment seat (2) is a covered box seat, and the battery compartment seat (2) is fixedly installed to the middle support of the alloy frame (1) by bolts.

3. The electric wheelchair chassis structure with four-wheel independent shock absorption according to claim 1, characterized in that: The front of the steering damping arm (4) is provided with a pivot support, and the lower part of the pivot support is fixedly and rotatably mounted with a steering bracket. The steering support wheel (3) is fixedly and rotatably mounted on the lower part of the steering bracket through the pivot support.

4. The chassis structure of an electric wheelchair with four-wheel independent shock absorption according to claim 1, characterized in that: The lower part of the movable shock absorber arm (7) is fixedly installed with a reducer (12). The drive motor (10) is fixedly installed with the front drive side of the reducer (12) by bolts. The drive motor (10) is fixedly installed with the drive input shaft end of the reducer (12). The drive output shaft end of the reducer (12) is fixedly installed with a wheel mounting plate (13). The movable drive wheel (6) is fixedly installed with the wheel mounting plate (13) by bolts.

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