Wheelchair with adjustable vehicle width

Abstract

The utility model provides a wheelchair with adjustable vehicle width, wherein the side frames on both sides are adjustably connected through a movable connecting assembly in the middle, and the connection of the adjustable spacing between the side frames is mainly realized through two groups of connecting rod assemblies, the two groups of connecting rod assemblies are staggered with each other, and the middle of the two groups is hinged, one end of the connecting rod group is hinged to one side frame, and the other end is slidingly matched with the side frame on the opposite side, so that the spacing between the side frames can be changed by adjusting the angle between the two groups of connecting rod groups, which is equivalent to changing the width of the wheelchair seat; in addition, through the buckle engagement between the buckle rod of the first connecting rod group and the positioning rod on the second connecting rod group, the connecting rod assembly can be adjusted to be fixed at different angles, that is, the spacing between the two side frames can be adjusted more accurately, thereby realizing the adjustable width of the wheelchair seat, so that the wheelchair can be adaptively adjusted according to the user's body shape when in use, so that the size of the wheelchair is more consistent with the user.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, and in particular to a wheelchair with adjustable vehicle width. Background Art

[0002] With the continuous increase in the number of elderly people in China and the increasing demand for diversified travel by special disabled groups, electric wheelchairs have gradually become an indispensable means of transportation in the market. Electric wheelchairs are a type of mechanical equipment equipped with an electric drive device based on a traditional hand-cranked wheelchair. Most electric wheelchairs are mainly composed of a wheelchair frame, a drive motor, a controller, and a battery. Unlike traditional wheelchairs, electric wheelchairs have a special interactive structure that allows the wheelchair to move through manual or other forms of instructions, and can complete the action alone without relying on other external assistance.

[0003] The wheelchair bracket usually consists of a side frame, a bottom bracket, a seat bracket, a wheel bracket and other parts. The specific bracket distribution structure varies depending on the technical requirements of the wheelchair's load-bearing requirements, folding and storage requirements, etc. However, there are some problems in the use of general wheelchairs or electric wheelchairs. Specifically, the structure is fixed. Although it can be folded, the shape of the wheelchair is relatively fixed under normal use. Users often need to try out various sizes before use to select a wheelchair size that suits their own body shape. This situation brings considerable inconvenience to users, especially when a wheelchair is needed in an emergency. Users often do not have enough time to prepare the wheelchair in advance and choose a wheelchair size that suits them.

[0004] In summary, existing wheelchairs or electric wheelchairs have a technical problem of having a fixed structure and being difficult to adapt to changes in size of users. Utility Model Content

[0005] The technical problem to be solved by the utility model is that the existing wheelchairs or electric wheelchairs have fixed structures and are difficult to adapt to the size changes of users.

[0006] To solve the above problems, the utility model provides a wheelchair with adjustable vehicle width, comprising a pair of side frames and a movable adjustment component located between the two side frames and movably connected to the side frames, a seat plate being placed above the side frames, the movable adjustment component comprising a first connecting rod group and a second connecting rod group, the first connecting rod group and the second connecting rod group being cross-arranged, and their respective middle crossing positions being hinged to each other, one end of each of the first connecting rod group and the second connecting rod group being hinged to the side frame on one side, and the other end being slidingly matched with the side frame on the opposite side, the first connecting rod group being rotatably connected to a buckle rod, the buckle rod being provided with a buckle end at an end away from the connection with the first connecting rod group, and more than two positioning rods being evenly distributed on the second connecting rod group at preset intervals, the buckle end being buckled with the positioning rods at different positions to fix the angle between the first connecting rod group and the second connecting rod group at different positions to adjust the spacing between the two side frames.

[0007] The wheelchair with adjustable vehicle width provided in the utility model is designed, and the side frames on both sides are adjustable and movablely connected through the movable connecting assembly in the middle, and the connection of the adjustable spacing between the side frames is mainly realized through two groups of connecting rod assemblies, the two groups of connecting rod assemblies are staggered with each other, and the middle of the two groups is hinged, one end of the connecting rod group is hinged with one side frame, and the other end is slidingly matched with the side frame on the opposite side, so that the spacing between the side frames can be changed by adjusting the angle between the two groups of connecting rod groups, which is equivalent to changing the width of the wheelchair seat; in addition, through the buckle engagement between the buckle rod of the first connecting rod group and the positioning rod on the second connecting rod group, the connecting rod assembly can be adjusted to be fixed at different angles, that is, the spacing between the two side frames can be adjusted more accurately, and the width of the wheelchair seat can be adjusted, so that the wheelchair can be adaptively adjusted according to the user's body shape when in use, so that the size of the wheelchair is more consistent with the user, and the technical problem that the existing wheelchair or electric wheelchair has a fixed structure and is difficult to adapt to the size change of the user is effectively solved.

[0008] As a preferred solution, the respective ends of the first connecting rod group and the second connecting rod group are connected to the corresponding side frames via a sliding guide mechanism, and the sliding guide mechanism includes a guide sleeve and a slide bar that slides with the guide sleeve, and the slide bar is installed and fixed parallel to the side frame, and the guide sleeve is hinged to the ends of the first connecting rod group and the second connecting rod group.

[0009] The design optimizes the sliding fit between the ends of the two connecting rod groups and the side frame. A sliding bar is specially installed on the side frame, and a rotatably connected sliding sleeve is set at the end position of the two connecting rod assemblies. Through the sliding fit between the two, the sliding fit connection between the end of the connecting rod group and the side frame bracket is realized. The structure is simple and the limited sliding fit is stable.

[0010] As a preferred solution, the first link group and the second link group each include two links parallel to each other, and the two links are vertically arranged up and down at a preset distance. The buckle rod includes a supporting cross bar fixedly connected to its base, and the supporting cross bar is rotatably connected between the two links of the first link group. The two ends of the positioning rod are respectively installed and fixed to the two links of the second link group.

[0011] This design optimizes the structural designs of the first connecting rod group and the second connecting rod group, and both adopt a three-dimensional connecting rod group structure with a certain height. Each connecting rod group is composed of two upper and lower parallel connecting rods, which greatly improves the firmness and durability of the structure. It is adapted to the upper and lower double rod structure of the connecting rod group and optimizes the connection method between the buckle rod and the connecting rod group. Similarly, the positioning rod also adopts a structure in which two connecting rods are connected at both ends.

[0012] As a preferred solution, each of the two connecting rods of the first connecting rod group and the second connecting rod group is hinged to one of the guide sliding sleeves, and is slidably matched with one of the slide bars through the guide sliding sleeve.

[0013] This design is adapted to the above-mentioned double-link connecting rod group design to optimize the adaptability of the guide mechanism. A guide sleeve is connected to the end of each connecting rod, and a group of slide bars are arranged in conjunction with each guide sleeve to ensure that the guide mechanism works stably and is durable, and has higher strength than the structure of a single slide bar on one side.

[0014] As a preferred solution, the buckle end has a cylindrical groove on one side thereof which is parallel to the positioning rod, and the shape of the cylindrical groove matches the outer contour of the positioning rod in a concave-convex manner to elastically buckle the positioning rod. This design optimizes the structural design of the buckle end, and the black box cylindrical groove on its side has a specific shape that matches the outer contour of the positioning rod, so that the two can form a complete buckle, ensuring good positioning performance of the concave-convex match.

[0015] As a preferred solution, a raised pull structure is provided on the top of the buckle end for easy hand-held operation, which is used for the operator to pull to adjust the matching position between the buckle rod and the positioning rod. This design further optimizes the structural design of the buckle end, and increases friction through the raised pull structure to facilitate hand-held operation, making the buckle rod more suitable for manual pulling by the operator.

[0016] As a preferred solution, the movable adjustment assembly includes an adjustment side frame respectively mounted and fixed on the side frames on both sides, the two ends of the slide bar are mounted and connected to the adjustment side frame, and the hinged ends of the first connecting rod group and the second connecting rod group are hinged to the adjustment side frame. This design optimizes the connection structure design between the side frame and the movable adjustment assembly. The side frame is specially provided with an adjustment side frame to adapt to the installation connection of the movable adjustment assembly. The adjustment side frame has a connection structure specially connected to the two ends of the slide bar and the end of the connecting rod group.

[0017] As a preferred solution, the adjustable side frame has an electrical assembly position for installing and fixing a battery box and an electric control integrated box that are adapted to the wheelchair. Based on the above structure, the adjustable side frame is further structurally optimized, and a special installation position for installing the battery box and the electric control integrated box is reserved to avoid interference between the structure and the frame, thereby ensuring the installation characteristics of the bracket structure.

[0018] As a preferred solution, the respective ends of the first connecting rod group and the second connecting rod group are connected to the corresponding side frame through an automatic adjustment mechanism, and the automatic adjustment mechanism includes a driving pressure cylinder, which is installed and fixed in parallel to the side frame. The piston rod of the driving pressure cylinder is hinged to the respective ends of the first connecting rod group and the second connecting rod group, and is used to output feed motion through the driving pressure cylinder to drive the angle adjustment between the first connecting rod group and the second connecting rod group.

[0019] This design provides another design that is different from the above-mentioned sliding guide mechanism. It uses hydraulic or pneumatic cylinders to achieve automatic drive to promote the change of the angle between the two sets of connecting rods, so that the width adjustment process of the wheelchair can be automatically controlled, and the corresponding buckle rod and positioning rod can also be automatically driven. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the overall structure of a wheelchair with adjustable vehicle width provided by the utility model;

[0021] Figure 2 for Figure 1 A schematic diagram of the internal support structure of the vehicle width adjustable wheelchair;

[0022] Figure 3 for Figure 1 A schematic diagram of a partial structure of the internal support structure of the vehicle width adjustable wheelchair from another angle;

[0023] Figure 4 for Figure 1 Schematic diagram of the local structure near the movable adjustment components of the CRRC width-adjustable wheelchair.

[0024] in, Figure 1-Figure 4 middle:

[0025] 1. Seat plate; 2. Side frame; 3. First connecting rod group; 4. Second connecting rod group; 5. Buckle rod; 5-1. Support cross bar; 6. Positioning rod; 7. Buckle end; 7-1. Cylindrical groove; 7-2. Raised lever structure; 8. Slide bar; 9. Guide sleeve; 10. Adjustable side frame; 10-1. Electrical assembly position. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] refer to Figure 1-Figure 4 The following embodiments are described, Figure 1 A schematic diagram of the overall structure of a wheelchair with adjustable vehicle width provided by the utility model; Figure 2 for Figure 1 A schematic diagram of the internal support structure of the vehicle width adjustable wheelchair; Figure 3 for Figure 1 A schematic diagram of a partial structure of the internal support structure of the vehicle width adjustable wheelchair from another angle; Figure 4 for Figure 1 Schematic diagram of the local structure near the movable adjustment components of the CRRC width-adjustable wheelchair.

[0028] The wheelchair with adjustable vehicle width provided in the present embodiment comprises a pair of side frames 2 and a movable adjustment component located between the two side frames 2 and movably connected to the side frames 2, a seat plate 1 is placed above the side frames, the movable adjustment component comprises a first connecting rod group 3 and a second connecting rod group 4, the first connecting rod group 3 and the second connecting rod group 4 are cross-arranged, and their respective middle crossing positions are hinged to each other, one end of each of the first connecting rod group 3 and the second connecting rod group 4 is hinged to the side frame 2 on one side, and the other end is slidingly matched with the side frame 2 on the opposite side, the first connecting rod group 3 is rotatably connected to a buckle rod 5, the buckle rod 5 is provided with a buckle end 7 at the end away from the connection with the first connecting rod group 3, and more than two positioning rods 6 are evenly distributed on the second connecting rod group 4 at preset intervals, the buckle end 7 is buckled with the positioning rods 6 at different positions to fix the angle between the first connecting rod group 3 and the second connecting rod group 4 at different positions to adjust the spacing between the two side frames 2.

[0029] The wheelchair with adjustable vehicle width is designed in such a way that the side frames 2 on both sides are adjustable and movablely connected through an movable connecting assembly in the middle, and the connection with adjustable spacing between the side frames 2 is mainly realized through two sets of connecting rod assemblies. The two sets of connecting rod assemblies are staggered with each other and hinged in the middle. One end of the connecting rod assembly is hinged to the side frame 2 on one side, and the other end is slidingly matched with the side frame 2 on the opposite side. In this way, the spacing between the side frames 2 can be changed by adjusting the angle between the two sets of connecting rod assemblies, which is equivalent to changing the width of the wheelchair seat; in addition, through the engagement between the buckle rod 5 of the first connecting rod assembly 3 and the positioning rod 6 on the second connecting rod assembly 4, the connecting rod assembly can be adjusted to be fixed at different angles, that is, the spacing between the two side frames 2 can be adjusted more accurately, thereby realizing the adjustable width of the wheelchair seat, so that the wheelchair can be adaptively adjusted according to the user's body shape when in use, so that the size of the wheelchair is more in line with the user, and effectively solves the technical problem that the existing wheelchairs or electric wheelchairs have a fixed structure and are difficult to adapt to the size changes of the user.

[0030] In the technical solution provided in this embodiment, the respective ends of the first link group 3 and the second link group 4 are connected to the corresponding side frame 2 through a sliding guide mechanism, and the sliding guide mechanism includes a guide sleeve 9 and a slide bar 8 that slides with the guide sleeve 9, and the slide bar 8 is installed and fixed parallel to the side frame 2, and the guide sleeve 9 is hinged to the ends of the first link group 3 and the second link group 4.

[0031] The design optimizes the sliding fit between the respective ends of the two connecting rod groups and the side frame 2. A sliding bar 8 is specially installed on the side frame 2, and a rotatably connected sliding sleeve is set at the end position of the two connecting rod assemblies. Through the sliding fit between the two, the sliding fit connection between the end of the connecting rod group and the side frame 2 bracket is realized. The structure is simple and the limited sliding fit is stable.

[0032] In the technical solution provided in this embodiment, the first link group 3 and the second link group 4 each include two parallel links, and the two links are vertically arranged up and down at a preset distance. The buckle rod 5 includes a supporting cross bar 5-1 fixedly connected to its base, and the supporting cross bar 5-1 is rotatably connected between the two links of the first link group 3. The two ends of the positioning rod 6 are respectively installed and fixed to the two links of the second link group 4.

[0033] This design optimizes the structural design of the first connecting rod group 3 and the second connecting rod group 4, both of which adopt a three-dimensional connecting rod group structure with a certain height. Each connecting rod group is composed of two upper and lower parallel connecting rods, which greatly improves the firmness and durability of the structure. The upper and lower double rod structures of the connecting rod group are adapted to optimize the connection method between the buckle rod 5 and the connecting rod group. Similarly, the positioning rod 6 also adopts a structure in which two connecting rods are connected at both ends.

[0034] In the technical solution provided in this embodiment, each of the two connecting rods of the first connecting rod group 3 and the second connecting rod group 4 is hinged with a guide sleeve 9, and is slidably matched with a slide bar 8 through the guide sleeve 9.

[0035] This design is adapted to the above-mentioned double-link connecting rod group design to optimize the adaptability of the guide mechanism. A guide sleeve 9 is connected to the end of each connecting rod, and a group of slide bars 8 are arranged in conjunction with each guide sleeve 9 to ensure the working stability and durability of the guide mechanism. The structure has higher strength than the single slide bar 8 on one side.

[0036] In the technical solution provided by this embodiment, the buckle end 7 has a cylindrical groove 7-1 on one side thereof which is parallel to the positioning rod 6. The shape of the cylindrical groove 7-1 matches the outer peripheral contour of the positioning rod 6 in a concave-convex manner to elastically buckle the positioning rod 6. This design optimizes the structural design of the buckle end 7. The black box cylindrical groove 7-1 on its side has a specific shape that matches the outer peripheral contour of the positioning rod 6, so that the two can form a complete buckle, ensuring good positioning performance of the concave-convex match.

[0037] In the technical solution provided in this embodiment, a raised pull structure 7-2 is provided on the top of the buckle end 7 for easy hand-held operation, and is used for the operator to pull to adjust the matching position between the buckle rod 5 and the positioning rod 6. This design further optimizes the structural design of the buckle end 7, and increases friction through the raised pull structure 7-2 to facilitate hand-held operation, making the buckle rod 5 more suitable for manual pulling by the operator.

[0038] In the technical solution provided in this embodiment, the movable adjustment assembly includes an adjustment side frame 10 respectively mounted and fixed on the side frames 2 on both sides, the two ends of the slide bar 8 are mounted and connected to the adjustment side frame 10, and the hinged ends of the first connecting rod group 3 and the second connecting rod group 4 are hinged to the adjustment side frame 10. This design optimizes the connection structure design between the side frame 2 and the movable adjustment assembly. The side frame 2 is specially provided with the adjustment side frame 10 to adapt to the installation connection of the movable adjustment assembly. The adjustment side frame 10 has a connection structure specially connected to the two ends of the slide bar 8 and the end of the connecting rod group.

[0039] In the technical solution provided in this embodiment, the adjustable side frame 10 has an electrical assembly position 10-1 for installing and fixing a battery box and an electric control integrated box adapted to the wheelchair. On the basis of the above structure, the adjustable side frame 10 is further structurally optimized, and a special installation position for installing the battery box and the electric control integrated box is reserved to avoid mutual interference between the structure and the frame, thereby ensuring the installation characteristics of the bracket structure.

[0040] In the technical solution provided in this embodiment, the respective ends of the first connecting rod group 3 and the second connecting rod group 4 are connected to the corresponding side frame 2 through an automatic adjustment mechanism. The automatic adjustment mechanism includes a driving pressure cylinder, which is installed and fixed in parallel to the side frame 2. The piston rod of the driving pressure cylinder is hinged to the respective ends of the first connecting rod group 3 and the second connecting rod group 4, and is used to output feed motion through the driving pressure cylinder to drive the angle adjustment between the first connecting rod group 3 and the second connecting rod group 4.

[0041] This design provides another design that is different from the above-mentioned sliding guide mechanism. It uses a hydraulic or pneumatic cylinder to achieve automatic drive to promote the change of the angle between the two sets of connecting rods, so that the width adjustment process of the wheelchair can be automatically controlled, and the corresponding buckle rod 5 and the positioning rod 6 can also be automatically driven.

[0042] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A wheelchair with adjustable vehicle width, comprising a pair of side frames (2) and a movable adjustment assembly located between the two side frames (2) and movably connected to the side frames (2), a seat plate (1) being placed above the side frames, characterized in that: The movable adjustment component comprises a first connecting rod group (3) and a second connecting rod group (4), wherein the first connecting rod group (3) and the second connecting rod group (4) are cross-arranged and hinged to each other at their respective middle cross-arrangement positions, wherein one end of each of the first connecting rod group (3) and the second connecting rod group (4) is hinged to the side frame (2) on one side, and the other end is slidably matched with the side frame (2) on the opposite side, wherein the first connecting rod group (3) is rotatably connected to a buckle rod (5), wherein the buckle rod (5) is provided with a buckle end (7) at the end away from the connection with the first connecting rod group (3), and wherein the second connecting rod group (4) is evenly distributed with two or more positioning rods (6) at a preset distance, wherein the buckle end (7) is buckled to the positioning rods (6) at different positions to fix the angle between the first connecting rod group (3) and the second connecting rod group (4) at different positions to adjust the spacing between the two side frames (2).

2. The wheelchair with adjustable vehicle width according to claim 1, characterized in that: The respective ends of the first connecting rod group (3) and the second connecting rod group (4) are connected to the corresponding side frame (2) via a sliding guide mechanism, and the sliding guide mechanism includes a guide sleeve (9) and a slide bar (8) that slides with the guide sleeve (9), and the slide bar (8) is installed and fixed parallel to the side frame (2), and the guide sleeve (9) is hinged to the ends of the first connecting rod group (3) and the second connecting rod group (4).

3. The wheelchair with adjustable vehicle width according to claim 2, characterized in that: The first connecting rod group (3) and the second connecting rod group (4) each include two connecting rods parallel to each other, and the two connecting rods are vertically arranged up and down at a preset distance. The buckle rod (5) includes a supporting cross bar (5-1) fixedly connected to its base, and the supporting cross bar (5-1) is rotatably connected between the two connecting rods of the first connecting rod group (3). The two ends of the positioning rod (6) are respectively installed and fixed to the two connecting rods of the second connecting rod group (4).

4. The wheelchair with adjustable vehicle width according to claim 3, characterized in that: The two connecting rods of each of the first connecting rod group (3) and the second connecting rod group (4) are hinged to a guide sliding sleeve (9) and are slidably matched with a slide bar (8) through the guide sliding sleeve (9).

5. The wheelchair with adjustable vehicle width according to claim 3, characterized in that: The buckle end (7) has a cylindrical groove (7-1) on one side thereof which is parallel to the positioning rod (6); the shape of the cylindrical groove (7-1) matches the outer peripheral contour of the positioning rod (6) in a concave-convex manner so as to elastically buckle the positioning rod (6).

6. The wheelchair with adjustable vehicle width according to claim 5, characterized in that: The top of the buckle end (7) is provided with a raised actuating structure (7-2) that is convenient for handheld operation and is used for an operator to actuate to adjust the matching position between the buckle rod (5) and the positioning rod (6).

7. The wheelchair with adjustable vehicle width according to any one of claims 2 to 6, characterized in that: The movable adjustment component comprises an adjustment side frame (10) respectively mounted and fixed on the side frames (2) on both sides, the two ends of the slide bar (8) are mounted and connected to the adjustment side frame (10), and the hinged ends of the first connecting rod group (3) and the second connecting rod group (4) are hinged to the adjustment side frame (10).

8. The wheelchair with adjustable vehicle width according to claim 7, characterized in that: The adjustable side frame (10) has an electrical assembly position (10-1) for installing and fixing a battery box and an electric control integrated box adapted for the wheelchair.

9. The wheelchair with adjustable vehicle width according to claim 2, characterized in that: The respective ends of the first connecting rod group (3) and the second connecting rod group (4) are connected to the corresponding side frame (2) through an automatic adjustment mechanism, and the automatic adjustment mechanism includes a driving pressure cylinder, which is installed and fixed in parallel to the side frame (2), and the piston rod of the driving pressure cylinder is hinged to the respective ends of the first connecting rod group (3) and the second connecting rod group (4), so as to drive the adjustment of the angle between the first connecting rod group (3) and the second connecting rod group (4) by outputting a feed motion through the driving pressure cylinder.

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