A manual wheelchair frame reinforcing structure and a manual wheelchair

Abstract

This utility model discloses a manual wheelchair frame reinforcement structure and a manual wheelchair. The reinforcement structure includes two sets of mounting brackets respectively installed on both sides of the wheelchair frame and cross arms respectively installed at the front and rear ends of the wheelchair frame. The mounting brackets have multiple sets of positioning and adjustment holes, and reinforcement plates are provided on both sides of the cross arms. This utility model strengthens the overall support strength of the cross arms by installing rotating reinforcement plates on both sides of the cross arms, allowing the reinforcement plates to limit the formation of the first rotating groove. The second rotating groove on the reinforcement plate is connected to the positioning and adjustment holes on the mounting brackets through quick-release bolts, forming an adjustable rigid support point. When the wheelchair is subjected to load or impact, the reinforcement plates distribute some of the stress to the mounting brackets, reducing stress concentration at the hinge points and middle section of the cross arms, effectively enhancing the structural rigidity of the cross arms.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a reinforcement structure for a manual wheelchair frame. Background Technology

[0002] In the wheelchair industry, foldable designs have become one of the mainstream product forms due to their ability to significantly reduce storage space and improve portability. Currently, most foldable wheelchairs on the market use a cross-arm linkage structure to achieve the folding and unfolding of the frame. Through the rotation and extension of the cross arms, users can easily switch the wheelchair from the use state to the storage state, meeting the needs of diverse scenarios such as home storage and car transportation.

[0003] However, in long-term practical use, as the core load-bearing component connecting the wheelchair seat frame, footrests, and wheel axles, the crossarm is prone to significant stress concentration at its hinge points and in the middle section of the arm. When the user turns, crosses bumps, or rides on uneven surfaces, body weight and external impact forces are concentrated on the weak points of the crossarm. Furthermore, frequent folding and unfolding operations exacerbate wear at the hinge points, leading to a gradual decrease in arm rigidity. Over time, the crossarm is prone to irreversible deformation, and in severe cases, may even break, easily affecting the wheelchair's normal folding and unfolding functions and resulting in poor stability. Therefore, we propose a manual wheelchair frame reinforcement structure to address these issues. Utility Model Content

[0004] The purpose of this invention is to provide a manual wheelchair frame reinforcement structure to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] Some embodiments of this utility model provide a manual wheelchair frame reinforcement structure, including two sets of mounting brackets respectively installed on both sides of the wheelchair frame and cross arms respectively installed at the front and rear ends of the wheelchair frame. The mounting brackets are provided with multiple sets of positioning and adjustment holes. Reinforcing plates are provided on both sides of the cross arms. The reinforcing plates are provided with a first rotating groove and a second rotating groove on both sides respectively. The positioning and adjustment holes are connected to the second rotating groove on the reinforcing plate by quick-release bolts. The first rotating groove on the reinforcing plate is rotatably connected to both sides of the upper end of the cross arms by a rotating shaft.

[0007] In one embodiment, a rotating base is installed on the left front end of the wheelchair support, a connecting bracket is hinged inside the rotating base, and a pedal is hinged at the bottom of the connecting bracket.

[0008] In one embodiment, the reinforcing plate is an aluminum alloy component with an anodized layer on its surface.

[0009] In one embodiment, the middle section of the cross arm is provided with reinforcing ribs, and the connection between the reinforcing plate and the cross arm is provided with a gasket.

[0010] In one embodiment, the positioning adjustment holes are evenly distributed on the mounting bracket.

[0011] In one embodiment, the upper surface of the pedal is provided with anti-slip grooves.

[0012] In one embodiment, the overall edge of the pedal has an arcuate profile.

[0013] Some embodiments of this utility model also provide a manual wheelchair, including a wheelchair frame, wheels mounted at the bottom of the wheelchair frame, and handles located at the rear end of the wheelchair frame; the manual wheelchair frame reinforcement structure is mounted on the wheelchair frame.

[0014] Compared with the prior art, the beneficial effects of this utility model are at least as follows:

[0015] (1) This utility model has a reinforcing plate installed on both sides of the cross arm to allow the reinforcing plate to limit the formation of the first rotating groove, thereby strengthening the overall support strength of the cross arm. The reinforcing plate is rotatably connected to the upper end of the cross arm through the first rotating groove, so that the reinforcing plate can move synchronously with the folding and unfolding of the cross arm. The second rotating groove on the reinforcing plate is connected to the positioning adjustment hole on the mounting frame through quick-release bolts to form an adjustable rigid support point. When the wheelchair is subjected to load or impact, the reinforcing plate will distribute some of the stress to the mounting frame, reduce the stress concentration at the hinge point and middle section of the cross arm, effectively enhance the structural rigidity of the cross arm, and prevent deformation and breakage caused by long-term use or frequent folding. The quick-release bolt design makes it easy for users to quickly adjust or remove the reinforcing plate, which is convenient for maintenance and transportation, and effectively improves the stability of the equipment during use.

[0016] (2) This utility model fixes the rotating base to the front end of the wheelchair bracket, allowing the connecting bracket to rotate around the rotating base through the hinge point, thereby driving the pedal to fold or unfold. When unfolded, the pedal provides foot support for the user, and when folded, it is close to the connecting bracket, saving space and realizing the folding function of the pedal, thus improving the overall portability and storage efficiency of the wheelchair. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a manual wheelchair according to one embodiment of the present invention;

[0018] Figure 2 This is a front view of a manual wheelchair according to one embodiment of the present invention;

[0019] Figure 3 This is a rear view of a manual wheelchair according to one embodiment of the present invention;

[0020] Figure 4 for Figure 3 A magnified structural diagram of point A in the middle.

[0021] In the diagram: 1. Wheelchair frame; 2. Wheels; 3. Handle; 4. Mounting bracket; 5. Cross arm; 6. Reinforcing plate; 7. First rotating groove; 8. Second rotating groove; 9. Positioning adjustment hole; 10. Rotating base; 11. Connecting bracket; 12. Pedal; 13. Anti-slip groove. Detailed Implementation

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0023] like Figures 1 to 4 As shown, the manual wheelchair frame reinforcement structure provided in this embodiment includes two sets of mounting brackets 4 respectively installed on both sides of the wheelchair frame 1 and cross arms 5 respectively installed at the front and rear ends of the wheelchair frame 1. Each mounting bracket 4 has multiple sets of positioning adjustment holes 9. Reinforcing plates 6 are provided on both sides of the cross arms 5. First rotating grooves 7 and second rotating grooves 8 are respectively provided on both sides of the reinforcing plates 6. The positioning adjustment holes 9 are all connected to the second rotating grooves 8 on the reinforcing plates 6 via quick-release bolts. The first rotating grooves 7 on the reinforcing plates 6 are all rotatably connected to both sides of the upper end of the cross arms 5 via rotating shafts.

[0024] By installing rotating reinforcing plates 6 on both sides of the cross arm 5, the reinforcing plates 6 can limit the formation of the first rotating groove 7, thereby strengthening the overall support strength of the cross arm 5. The reinforcing plates 6 are rotatably connected to the upper end of the cross arm 5 through the first rotating groove 7, so that the reinforcing plates 6 can move synchronously with the folding and unfolding of the cross arm 5. The second rotating groove 8 on the reinforcing plate 6 is connected to the positioning adjustment hole 9 on the mounting frame 4 through quick-release bolts, forming an adjustable rigid support point. When the wheelchair is subjected to load or impact, the reinforcing plates 6 distribute some of the stress to the mounting frame 4, reducing stress concentration at the hinge point and middle section of the cross arm 5, effectively enhancing the structural rigidity of the cross arm 5, and preventing deformation and breakage caused by long-term use or frequent folding. The quick-release bolt design allows users to quickly adjust or remove the reinforcing plates 6, facilitating maintenance and transportation, and effectively improving the stability of the equipment during use.

[0025] In other embodiments, a rotating base 10 is installed on the left side of the front end of the wheelchair frame 1. A connecting bracket 11 is hinged inside the rotating base 10, and a pedal 12 is hinged to the bottom of the connecting bracket 11. By fixing the rotating base 10 to the front end of the wheelchair frame 1, the connecting bracket 11 can rotate around the rotating base 10 through the hinge point, thereby driving the pedal 12 to fold or unfold. When unfolded, the pedal 12 provides foot support for the user, and when folded, it fits tightly against the connecting bracket 11, saving space. This achieves the folding function of the pedal 12 and improves the overall portability and storage efficiency of the wheelchair.

[0026] In other embodiments, the reinforcing plate 6 is an aluminum alloy component with an anodized layer on its surface. Because high-strength aluminum alloys possess excellent specific strength and toughness, they can withstand large loads without easily deforming. The anodizing process forms a hardened layer on the surface, improving wear resistance and corrosion resistance. This significantly enhances the durability and environmental erosion resistance of the reinforcing plate 6 while ensuring lightweight design, making it suitable for various applications.

[0027] In other embodiments, a reinforcing rib is provided inside the middle section of the crossarm 5, and a gasket is provided at the connection between the reinforcing plate 6 and the crossarm 5. Through this design, the reinforcing rib is embedded inside the middle section of the crossarm 5, enhancing its bending and torsional resistance, while the gasket is placed at the connection to reduce direct friction between metals, reduce noise and wear, and improve user comfort.

[0028] In other embodiments, the positioning adjustment holes 9 are evenly distributed on the mounting bracket 4. This design provides users with multiple reinforcement point options, allowing them to adjust the installation position of the reinforcement plate 6 according to actual usage needs. This enhances the adaptability and flexibility of the structure, and users can optimize the support effect based on factors such as weight and road conditions, thus improving the personalized user experience.

[0029] In other embodiments, the upper surface of the pedal 12 is provided with anti-slip grooves 13.

[0030] This design effectively increases the friction between the pedal 12 and the user's foot, preventing the foot from slipping during walking and significantly improving safety. It is especially suitable for wet or bumpy roads, reducing the risk of accidental slippage.

[0031] In other embodiments, the pedal 12 has an arcuate profile along its entire edge;

[0032] This design eliminates sharp angles by rounding the edges of pedal 12, preventing users' legs from being scratched upon contact, improving the product's user-friendliness and safety, conforming to ergonomic design, and making it suitable for long-term use.

[0033] This embodiment provides a manual wheelchair frame reinforcement structure. Under normal use, when the user is riding the wheelchair, the body weight and ground impact force are mainly transmitted to the wheelchair frame 1 through the cross arm 5. The reinforcement plate 6 is rotatably connected to the upper end of the cross arm 5 through the first rotating groove 7, and is fixed to the positioning adjustment hole 9 on the mounting frame 4 through the second rotating groove 8 and quick-release bolts. At this time, the reinforcement plate 6 acts as an auxiliary load-bearing component, distributing part of the load to the mounting frame 4, significantly reducing the stress peak at the hinge point and middle section of the cross arm 5. The user can adjust the position of the reinforcement plate 6 in the positioning adjustment hole 9 at different positions by loosening the quick-release bolts to adapt to different usage conditions.

[0034] Furthermore, this embodiment also provides a manual wheelchair, which includes a wheelchair frame 1, wheels 2 mounted on the bottom of the wheelchair frame 1, and handles 3 disposed at the rear end of the wheelchair frame 1. The wheelchair frame 1 is provided with the manual wheelchair frame reinforcement structure.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A manually propelled wheelchair frame reinforcement structure, characterized by, It includes two sets of mounting brackets (4) installed on both sides of the wheelchair bracket (1) and cross arms (5) installed at the front and rear ends of the wheelchair bracket (1); the mounting brackets (4) have multiple sets of positioning adjustment holes (9); the cross arms (5) are provided with reinforcing plates (6) on both sides; the reinforcing plates (6) are provided with a first rotating groove (7) and a second rotating groove (8) on both sides; the positioning adjustment holes (9) are connected to the second rotating groove (8) on the reinforcing plate (6) by quick-release bolts; the first rotating groove (7) on the reinforcing plate (6) is rotatably connected to the upper ends of the cross arms (5) by a rotating shaft.

2. A manually propelled wheelchair frame reinforcement structure according to claim 1, characterized in that: A rotating base (10) is installed on the left front end of the wheelchair bracket (1), and a connecting bracket (11) is hinged inside the rotating base (10). A pedal (12) is hinged to the bottom of the connecting bracket (11).

3. A manually propelled wheelchair frame reinforcement structure according to claim 2, wherein: The upper surface of the pedal (12) is provided with anti-slip grooves (13).

4. The manual wheelchair frame reinforcement structure according to claim 2, characterized in that: The pedal (12) has an arc-shaped profile along its entire edge.

5. The manual wheelchair frame reinforcement structure according to claim 1, characterized in that: The reinforcing plate (6) is an aluminum alloy component with an anodized layer on its surface.

6. The manual wheelchair frame reinforcement structure according to claim 1, characterized in that: The cross arm (5) has a reinforcing rib inside the middle section, and a gasket is provided at the connection between the reinforcing plate (6) and the cross arm (5).

7. The manual wheelchair frame reinforcement structure according to claim 1, characterized in that: The positioning adjustment holes (9) are evenly distributed on the mounting bracket (4).

8. A manual wheelchair, comprising a wheelchair frame (1), wheels (2) mounted on the bottom of the wheelchair frame (1), and a handle (3) disposed at the rear end of the wheelchair frame (1); characterized in that: The wheelchair frame (1) is equipped with a manual wheelchair frame reinforcement structure as described in any one of claims 1-7.

Images