A new shock-absorbing wheelchair

Abstract

The utility model provides a novel shock absorbing wheelchair, including main frame body, shock absorber and connecting frame can be rotatably connected on the main frame body respectively, the rotation center line of shock absorber and the rotation center line of connecting frame are mutually parallelly arranged, and the other end of shock absorber is hinged on connecting frame, the utility model discloses shock absorber and connecting frame are set up on the main frame body, and make the rotation center line of shock absorber and the rotation center line of connecting frame parallel arrangement, and set up spacing structure in connecting frame end, effectively limit swing range of shock absorber in the working process, strengthened the stability of whole car in the driving process, reduced the rocking and discomfort due to the wheel swing, thereby promoted the security and comfort of the ride, at the same time, the cooperation design of arc slot and limiting piece in spacing structure can reasonably restrict the swing angle of connecting frame, reduce the risk of shock absorbing assembly damage, prolong the service life.

Description

Technical Field

[0001] This utility model belongs to the field of wheelchair technology and relates to a new type of shock-absorbing wheelchair. Background Technology

[0002] A wheelchair is an assistive device used for short-distance movement by people with mobility impairments. It is widely used in hospitals, nursing homes, and daily life, and mainly consists of a seat, support frame, and wheels. As people's demands for wheelchair comfort and adaptability to complex road conditions continue to increase, more and more wheelchairs are being equipped with shock-absorbing structures to mitigate vibrations caused by uneven road surfaces during movement, thereby improving riding comfort and safety.

[0003] Currently, some wheelchairs use shock-absorbing components between the wheels and the main frame to absorb impacts during movement. However, due to unreasonable structural design, existing shock-absorbing components are simply hinged to the frame and wheels at both ends. This leads to significant swaying of the components when under load or impacted by the road surface, affecting overall stability, potentially causing discomfort for the rider, and even posing safety hazards. Furthermore, some existing shock-absorbing devices lack effective limitation on the sway range in their structural layout, relying solely on the component's own stroke to restrict its movement. This easily leads to damage to the components and results in inadequate shock absorption and poor practicality. Moreover, some existing wheelchairs lack ergonomic design; the seat frame and backrest are often flat or simply have a backrest tilt angle, failing to fully conform to the natural sitting curve of the human body. This can cause lower back discomfort, fatigue during prolonged use, and poor comfort, failing to meet the needs of users who rely on wheelchairs long-term. Utility Model Content

[0004] The purpose of this invention is to provide a new type of shock-absorbing wheelchair to solve the problems mentioned in the background art, such as poor stability of existing wheelchair shock-absorbing components, uncontrollable swing range, and discomfort caused by lack of ergonomic design.

[0005] The technical solution of this utility model is implemented as follows:

[0006] A novel shock-absorbing wheelchair includes a main frame, on which shock absorbers and a connecting frame are rotatably connected. The rotation center line of the shock absorber is parallel to the rotation center line of the connecting frame. The other end of the shock absorber is hinged to the connecting frame. The end of the connecting frame is provided with a limiting structure that allows the connecting frame to swing in a designated area. Rear wheels are rotatably mounted on the connecting frame.

[0007] Preferably, the limiting structure includes an arc-shaped groove at the end of the connecting frame, the center of the arc-shaped groove coincides with the rotation center of the connecting frame on the main frame, and a limiting block is installed on the main frame, the limiting block being slidably connected in the arc-shaped groove.

[0008] Preferably, the main frame is provided with a seat, the seat includes a protruding section near the front end and a recessed section near the rear end, and the protruding section and the recessed section are smoothly transitioned.

[0009] Preferably, the main frame includes a frame portion located in the middle, a backrest support portion located behind the frame portion and extending upward, and an auxiliary wheel mounting portion located behind the frame portion and extending downward and backward. An auxiliary wheel is mounted at the end of the auxiliary wheel mounting portion, and the front of the backrest support portion is configured as a forward-protruding arc-shaped structure. The seat frame is mounted above the frame portion.

[0010] Preferably, an armrest is installed between the frame portion and the backrest support portion of the main frame.

[0011] Preferably, the front end of the main frame is equipped with a front wheel, which is a swivel wheel.

[0012] Preferably, a foot pedal is installed at the front of the main frame.

[0013] Preferably, there are two main frames, which are connected by intersecting connecting rods.

[0014] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0015] This invention effectively limits the swing range of the shock absorber during operation by setting a shock absorber and a connecting frame on the main frame, with the rotation center line of the shock absorber parallel to that of the connecting frame, and a limiting structure at the end of the connecting frame. This enhances the stability of the vehicle during driving, reduces swaying and discomfort caused by wheel swaying, and thus improves the safety and comfort of the ride. At the same time, the cooperative design of the arc groove and the limiting block in the limiting structure can reasonably constrain the swing angle of the connecting frame, reduce the risk of damage to the shock absorber components, and extend their service life.

[0016] In addition, the wheelchair's seat frame adopts an ergonomic structural design, with a higher front and lower back and a smooth transition, which can better conform to the natural sitting posture curve of the human body, improve the support and comfort of the ride, and alleviate fatigue caused by long-term use; the overall structure layout is reasonable, which not only has good shock absorption function, but also optimizes comfort and safety, making it especially suitable for users who have high requirements for the riding experience, and it is highly practical. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 The three-dimensional representation of this utility model Figure 1 ;

[0019] Figure 2 The three-dimensional representation of this utility model Figure 2 ;

[0020] Figure 3 This is a partial three-dimensional structural diagram of the present invention;

[0021] Figure 4 This utility model Figure 3 Planar structural diagram;

[0022] Figure 5 This is a structural diagram of the connecting frame of this utility model.

[0023] in:

[0024] 1. Main frame; 101. Backrest support; 102. Frame; 103. Auxiliary wheel mounting; 104. Limiting block; 2. Shock absorber; 3. Connecting frame; 301. Arc groove; 4. Seat frame; 401. Protruding section; 402. Recessed section; 5. Auxiliary wheel; 6. Rear wheel; 7. Handrail frame; 8. Front wheel; 9. Foot pedal; 10. Connecting rod; 11. Support block. Detailed Implementation

[0025] 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.

[0026] As shown in the figure, a novel shock-absorbing wheelchair includes a main frame 1, wherein there are two main frames 1, which are connected by intersecting connecting rods 10. In this example, the intersecting connecting rods 10 are hinged at the intersection to enable relative rotation between the connecting rods 10, providing structural contact for the folding of the wheelchair. Furthermore, the lower ends of the intersecting connecting rods 10 are hinged to the main frame 1, and the upper ends of the connecting rods 10 are connected to the seat frame 4. The seat frame 4 can be separated from the main frame 1, thereby achieving the folding effect of the wheelchair when the two main frames 1 are brought close together.

[0027] The main frame 1 is rotatably connected to a shock absorber 2 and a connecting frame 3, such as Figure 4 As shown, in this example, the shock absorber 2 is located at the rear of the main frame 1 and is arranged vertically as a whole, and can swing slightly around its hinge axis; the connecting frame 3 is hinged to the main frame 1 below the shock absorber 2 by a pin. More specifically, two connecting frames 3 are configured on the same main frame 1, located on both sides of the main frame 1 respectively, and the middle upper position of the connecting frame 3 is hinged to the shock absorber 2.

[0028] The rotation center line of the shock absorber 2 is parallel to the rotation center line of the connecting frame 3. The other end of the shock absorber 2 is hinged to the connecting frame 3. The end of the connecting frame 3 is provided with a limiting structure that allows the connecting frame 3 to swing within a designated area. The rear wheel 6 is rotatably mounted on the connecting frame 3. This arrangement avoids the shock absorber 2 being directly hinged to the rear wheel 6. By using the connecting frame 3 as an intermediate structure, the swing of the shock absorber 2 is prevented from being directly caused by the swing of the wheel along its axis. This allows the force borne by the shock absorber 2 to be more reasonably distributed, reducing the swing amplitude and structural fatigue caused by concentrated impact, and helping to improve the overall shock absorption effect and structural stability. In addition, the limiting structure at the end of the connecting frame 3 further limits its swing range, preventing excessive movement from causing structural interference or damage, thereby enhancing the safety and service life of the wheelchair in complex road conditions.

[0029] Specifically, the limiting structure includes an arc-shaped groove 301 at the end of the connecting frame 3. The center of the arc-shaped groove 301 coincides with the rotation center of the connecting frame 3 on the main frame 1. A limiting block 104 is installed on the main frame 1. The limiting block 104 is slidably connected in the arc-shaped groove 301. This configuration has the characteristics of simple structure and good limiting effect. In addition, in other embodiments, this limiting structure can also be two limiting members set on the main frame 1 at the upper and lower positions of the swing trajectory of the connecting frame 3, which can also limit the swing stroke of the connecting frame 3.

[0030] Specifically, the main frame 1 is provided with a seat frame 4. More specifically, the main frame 1 is provided with at least two support blocks 11. The upper surface of the support block 11 is recessed and has the same shape as the lower surface of the seat frame 4. The seat frame 4 is placed on the support block 11. The upper end of the aforementioned intersecting connecting rod 10 is connected to the seat frame 4. When the two main frames 1 come together, the seat frame 4 separates from the support block 11, realizing the folding effect of the wheelchair. When the two main frames 1 move away from each other to their extreme positions, the seat frame 4 falls on the support block 11. The seat frame 4 includes a protruding section 401 near the front end and a recessed section 402 near the rear end. The protruding section 401 and the recessed section 402 are smoothly transitioned. This design is used to give the seat frame 4 an ergonomically optimized profile, effectively conforming to the natural curvature of the user's buttocks and thighs when sitting, enhancing the coverage and support during sitting, and improving riding comfort.

[0031] Specifically, the main frame 1 includes a frame portion 102 located in the middle, a backrest support portion 101 located behind the frame portion 102 and extending upward, and an auxiliary wheel mounting portion 103 located behind the frame and extending downward and backward. An auxiliary wheel 5 is mounted at the end of the auxiliary wheel mounting portion 103. The front of the backrest support portion 101 is designed with a forward-protruding arc-shaped structure. The seat frame 4 is mounted above the frame portion 102. The structural design of the frame portion 102 enhances the overall structural strength of the main frame 1 and improves its load-bearing capacity, reducing the probability of deformation and damage to the main frame 1, thus contributing to improved structural strength and stability of the entire vehicle. The forward-protruding arc-shaped design of the backrest support portion 101 better conforms to the natural curve of the human back, improving seating comfort and reducing fatigue from prolonged sitting. The downward and backward extension of the auxiliary wheel mounting portion 103 allows the auxiliary wheels 5 to make reasonable contact with the ground, effectively improving the wheelchair's anti-tipping ability under extreme conditions such as inclines, declines, and backward tilts, thus enhancing safety.

[0032] Specifically, an armrest frame 7 is installed between the frame portion 102 and the backrest support portion 101 of the main frame 1. The armrest frame 7 connects the frame portion 102 and the backrest support portion 101, further improving the structural strength of the wheelchair frame. This allows the passenger to use the armrest for support and anti-tipping during riding or moving, enhancing body stability. It also provides convenient support points for the passenger, making it easier to get on and off the wheelchair, and helps improve the ergonomic adaptability and ease of use of the entire vehicle.

[0033] Specifically, the front end of the main frame 1 is equipped with a front wheel 8, which is a swivel wheel to enable the wheelchair to have good steering ability and flexible maneuverability. It can also change direction flexibly in narrow indoor and outdoor spaces, improve the wheelchair's handling performance, facilitate precise control by the user, and enhance the degree of freedom of use and passability.

[0034] Specifically, a footrest 9 is installed in front of the main frame 1, which can provide a support platform for the rider's feet, relieve the fatigue caused by the legs being suspended in the air, help improve blood circulation, enhance riding comfort, and maintain the stability and safety of the user's lower limbs during wheelchair movement, preventing the feet from being caught in ground obstacles or inside the wheels and causing injury.

[0035] When this new type of shock-absorbing wheelchair is in use, the rear wheels 6 rotate stably on flat surfaces. Since there is no significant impact, the shock absorbers 2 remain in their original state, undergoing almost no compression or extension, thus maintaining the stability of the entire vehicle structure. When the wheelchair travels over a raised surface, the rear wheels 6 experience an upward impact, causing the movable end of the connecting frame 3 (the end with the arc-shaped groove 301) to move upward. This, in turn, causes the shock absorbers 2, hinged to the connecting frame 3, to compress, absorbing the impact energy from the ground and effectively mitigating the transmission of vibration to the occupant. When the wheelchair travels over a sunken surface, the rear wheels 6 suddenly sink, causing the connecting frame 3 to swing downward, extending the shock absorbers 2. This, to a certain extent, slows down the sinking speed of the vehicle, improving overall passability and stability. Through the cooperation of the connecting frame 3 and the limiting structure, the swing range of the shock absorbers 2 is effectively limited, ensuring that the shock absorbers 2 always operate within a controllable range, preventing damage, and simultaneously ensuring shock absorption effect and safety of use.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A new shock absorbing wheelchair, characterized in that, Includes a main frame (1), on which a shock absorber (2) and a connecting frame (3) are rotatably connected respectively. The other end of the shock absorber (2) is hinged to the connecting frame (3). The end of the connecting frame (3) is provided with a limiting structure that allows the connecting frame (3) to swing in a designated area. A rear wheel (6) is rotatably mounted on the connecting frame (3).

2. A new shock absorbing wheelchair as claimed in claim 1, wherein: The limiting structure includes an arc-shaped groove (301) opened at the end of the connecting frame (3). The center of the arc-shaped groove (301) coincides with the rotation center of the connecting frame (3) on the main frame (1). A limiting block (104) is installed on the main frame (1). The limiting block (104) is slidably connected in the arc-shaped groove (301).

3. A novel shock-absorbing wheelchair according to claim 1, characterized in that: The main frame (1) is provided with a seat (4), which includes a protruding section (401) near the front end and a recessed section (402) near the rear end, with a smooth transition between the protruding section (401) and the recessed section (402).

4. A novel shock-absorbing wheelchair according to claim 3, characterized in that: The main frame (1) includes a frame part (102) located in the middle, a backrest support part (101) located behind the frame part (102) and extending upward, and an auxiliary wheel mounting part (103) located behind the frame and extending downward and backward. An auxiliary wheel (5) is mounted at the end of the auxiliary wheel mounting part (103). The front of the backrest support part (101) is configured as a forward-protruding arc structure. The seat frame (4) is installed above the frame part (102).

5. A novel shock-absorbing wheelchair according to claim 1, characterized in that: A handrail (7) is installed between the frame part (102) and the backrest support part (101) of the main frame (1).

6. A novel shock-absorbing wheelchair according to claim 1, characterized in that: The front end of the main frame (1) is equipped with a front wheel (8), which is a caster wheel.

7. A novel shock-absorbing wheelchair according to claim 1, characterized in that: A foot pedal (9) is installed at the front of the main frame (1).

8. A novel shock-absorbing wheelchair according to claim 1, characterized in that: There are two main frames (1), and the two main frames (1) are connected by intersecting connecting rods (10).

9. A novel shock-absorbing wheelchair according to claim 1, characterized in that: The rotation center line of the shock absorber (2) is set parallel to the rotation center line of the connecting frame (3).

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