CN220495154U

CN220495154U - Adjustable wheelchair

Info

Publication number: CN220495154U
Application number: CN202321845559.5U
Authority: CN
Inventors: 胡晓能
Original assignee: Zhejiang Huirui Medical Instrument Co ltd
Current assignee: Zhejiang Huirui Medical Instrument Co ltd
Priority date: 2023-07-13
Filing date: 2023-07-13
Publication date: 2024-02-20
Anticipated expiration: 2033-07-13

Abstract

The utility model relates to the field of medical equipment, in particular to an adjustable wheelchair, which comprises a frame, a cushion, a backrest, a front wheel assembly and a rear wheel assembly, wherein a quick-release device is arranged on the rear wheel assembly; the frame comprises a connecting rod and a vertical rod, the vertical rod is connected with a mounting seat connected with the quick-release device, and gear holes and connecting holes for adjusting the mounting height of the mounting seat are respectively formed in the vertical rod and the mounting seat; the connecting rod is provided with a positioning hole, the front wheel assembly comprises a front wheel, an inclined front fork and a connecting cylinder which are sequentially connected in a rotating way, the connecting cylinder is provided with a connecting plate, the connecting plate is provided with a strip-shaped groove, the strip-shaped groove is connected with an eccentric gasket, the eccentric gasket is eccentrically provided with a perforation, the strip-shaped groove is internally provided with an avoidance hole, and the perforation, the avoidance hole and the positioning hole are connected by utilizing a positioning bolt and a positioning nut; the utility model solves the problem that the height of the rear wheel of the wheelchair is not adjustable and can not adapt to users with different sizes on the premise that the front wheel assembly can be flexibly used.

Description

Adjustable wheelchair

Technical Field

The utility model relates to the field of medical equipment, in particular to an adjustable wheelchair.

Background

With the development and progress of society, the life guarantee and the life quality of the disabled and the elderly have been paid attention to by various communities, and in order to expand the range of activities, the disabled and the elderly generally use a wheelchair as a walking aid, so that the life quality is improved.

The wheelchair on the market generally comprises a frame, a cushion, a backrest, a front wheel assembly and a rear wheel assembly, wherein the cushion, the backrest, the front wheel assembly and the rear wheel assembly are connected to the frame; when the rear wheel assembly is installed at different heights, the axis of the connecting cylinder is changed, so that the front fork is inconvenient to incline and adjust the orientation.

On the premise of ensuring that the front wheel assembly can be flexibly used, the mounting height of the rear wheel assembly is adjusted so as to adapt to users with different body types, and the problem which is yet to be solved by a designer is solved.

Disclosure of Invention

In order to solve the problems, the utility model provides an adjustable wheelchair, which solves the problems that the height of the rear wheel of the wheelchair is not adjustable and the wheelchair cannot adapt to users with different sizes on the premise that the front wheel assembly can be flexibly used.

The technical scheme adopted by the utility model is as follows: an adjustable wheelchair comprises a frame, a cushion and a backrest, wherein the frame is connected with a front wheel assembly and a rear wheel assembly, and the rear wheel assembly is provided with a quick-release device; the frame comprises a connecting rod and a vertical rod, wherein the vertical rod is connected with a mounting seat connected with the quick-release device, gear holes and connecting holes are respectively formed in the vertical rod and the mounting seat, and the number of the gear holes is at least two along the length direction of the vertical rod;

the connecting rod is provided with a positioning hole, the front wheel assembly comprises a front wheel, an inclined front fork and a connecting cylinder, the front wheel is rotationally connected to the inclined front fork, the inclined front fork is rotationally connected to the connecting cylinder, the side edge of the connecting cylinder is provided with a connecting plate, the connecting plate is provided with a strip-shaped groove, the strip-shaped groove is connected with an eccentric gasket, two opposite side surfaces of the eccentric gasket are abutted to the inner wall of the strip-shaped groove, the eccentric gasket is eccentrically provided with a perforation, the strip-shaped groove is internally provided with an avoidance hole, positioning bolts penetrate through the perforation, the avoidance hole and the positioning hole, and the positioning bolts are connected with positioning nuts; the eccentric gasket, the avoidance hole, the positioning bolt and the positioning nut are arranged in the front wheel assembly in two groups.

Through the technical scheme, when the connecting holes are connected to the gear holes on different heights, the mounting seat can mount the rear wheel assembly on different heights through the quick-dismantling device, so that users with different sizes can use the rear wheel assembly conveniently; after the installation of the rear wheel assembly is completed, the eccentric gasket is installed in the strip-shaped groove at a proper angle, and the orientation of the connecting cylinder can be adjusted by utilizing the positioning bolt and the positioning nut to install and connect the perforation, the avoidance hole and the positioning hole, so that the wheelchair is enabled to approach to the vertical direction between the rotating axis of the connecting cylinder and the ground when being stably placed on the ground, and the flexible use of the front wheel assembly is ensured.

Further, the positioning hole penetrates through the connecting rod, the axis of the connecting cylinder is parallel to the plane where the connecting plate is located, and the axis of the connecting cylinder is located at one side of the plane where the connecting plate is located, which is deviated from the strip-shaped groove.

Through the technical scheme, the plane where the connecting plate is located is close to the side surface of the connecting cylinder or tangent to the side surface of the connecting cylinder, a user can assemble the connecting plate positively or reversely by utilizing the positioning holes on the two sides of the connecting rod, the distance between the connecting cylinder and the rear wheel assembly can be adjusted, the adjusting capability is higher, the rear wheel assembly can be installed on more heights, and the range of applicable people is increased.

Further, the length direction of the connecting rod and the length direction of the strip-shaped groove are all in vertical arrangement, and the top surface and the bottom surface of the connecting plate are respectively flush with the top surface and the bottom surface of the connecting cylinder.

Through the technical scheme, the point positions of the connecting plate and the connecting rod which are connected with each other are closer to the connecting cylinder, so that the connection between the connecting plate and the connecting rod is more stable, and the occurrence of looseness is reduced;

further, the two side walls of the strip-shaped groove are parallel to each other, the circumferential profile of the eccentric gasket is regular polygon, and the number of the side surfaces of the eccentric gasket is even.

Through the technical scheme, the areas of the side surfaces of the eccentric gaskets are consistent, so that the stress of the eccentric gaskets is balanced.

Further, the number of the gear holes is at least three in the length direction of the vertical rod, the number of the connecting holes is two in a single connecting plate, and the gear holes are connected with the connecting holes in pairs.

Through foretell technical scheme, satisfy under the connecting plate can adjust mounting height's the prerequisite, connecting plate and montant pass through two gear holes and two connecting holes interconnect, have strengthened the fastness of connection for the installation of connecting plate and connecting cylinder is more stable.

Further, a mounting cylinder with two through ends is fixedly connected to the mounting seat, the quick-release device comprises a shaft sleeve, a shaft core, a spring, a button and steel balls, a first annular bulge which is in sliding connection with the shaft core is arranged in the shaft sleeve, a second annular bulge is arranged on the shaft core, the spring is sleeved on the shaft core and is abutted between the first annular bulge and the second annular bulge, a clamping groove for accommodating the steel balls is arranged on the shaft core, a clamping hole for accommodating the steel balls is formed in the shaft sleeve, the button is arranged at one end, far away from the clamping groove, of the shaft core, a limit screw is connected to one end, close to the clamping groove, of the shaft core in a threaded manner, and an annular limit bulge is arranged in the shaft sleeve; the shaft sleeve is provided with a limit nut, the rear wheel assembly comprises a flower drum barrel, and the flower drum barrel and the mounting barrel are detachably connected between the limit nut and the steel balls.

Through the technical scheme, after the button is pressed, the clamping groove is in butt joint with the clamping hole, the steel balls can fall back into the clamping groove, at the moment, a user can disconnect the shaft sleeve and the parts on the shaft sleeve from the mounting cylinder, so that the rear wheel assembly is unlocked from the frame, and the rear wheel assembly is more convenient to mount and dismount; the spring can rebound the axle core for the axle sleeve, and the spacing screw cooperation annular spacing protruding can restrict the longest extension degree of spring for the action that the steel ball can realize automatic outwards stretching out makes the use more convenient.

Further, at least two clamping holes are formed in the single shaft sleeve.

By the technical scheme, the steel balls are more uniformly stressed when being clamped with the mounting cylinder, deformation of the steel balls caused by overlarge local stress on the steel balls is avoided, and the service life of the steel ball mounting cylinder is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is one of the exploded views of a portion of the structure of the present utility model;

FIG. 3 is a schematic view of a portion of the structure of the present utility model;

FIG. 4 is a second schematic diagram of a portion of the structure of the present utility model;

FIG. 5 is a partial cross-sectional view of the structure of the present utility model;

FIG. 6 is a second exploded view of a portion of the structure of the present utility model;

the utility model label information is as follows:

1. a frame; 2. a cushion; 3. a backrest; 4. a mounting base; 5. a gear hole; 6. a connection hole; 7. positioning holes; 8. a front wheel; 9. tilting the front fork; 10. a connecting cylinder; 11. a connecting plate; 12. a strip-shaped groove; 13. an eccentric pad; 14. perforating; 15. avoidance holes; 16. positioning bolts; 17. positioning a nut; 18. a mounting cylinder; 19. a shaft sleeve; 20. a shaft core; 21. a spring; 22. a button; 23. steel balls; 24. a first annular projection; 25. a second annular projection; 26. a clamping groove; 27. a clamping hole; 28. a limit screw; 29. an annular limit protrusion; 30. a limit nut; 31. a flower drum; 101. a connecting rod; 102. a vertical rod;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1, 2 and 3, an adjustable wheelchair comprises a frame 1, a cushion 2 and a backrest 3, wherein the frame 1 is connected with a front wheel assembly and a rear wheel assembly, and the rear wheel assembly is provided with a quick-release device; the frame 1 comprises a connecting rod 101 and a vertical rod 102, the vertical rod 102 is connected with a mounting seat 4 connected with a quick-release device, gear holes 5 and connecting holes 6 are respectively formed in the vertical rod 102 and the mounting seat 4, and the number of the gear holes 5 is at least two along the length direction of the vertical rod 102;

the connecting rod 101 is provided with a positioning hole 7, the front wheel assembly comprises a front wheel 8, an inclined front fork 9 and a connecting cylinder 10, the front wheel 8 is rotationally connected to the inclined front fork 9, the inclined front fork 9 is rotationally connected to the connecting cylinder 10, the side edge of the connecting cylinder 10 is provided with a connecting plate 11, the connecting plate 11 is provided with a strip-shaped groove 12, the strip-shaped groove 12 is connected with an eccentric gasket 13, two opposite side surfaces of the eccentric gasket 13 are abutted against the inner wall of the strip-shaped groove 12, the eccentric gasket 13 is eccentrically provided with a perforation 14, the strip-shaped groove 12 is internally provided with an avoidance hole 15, the perforation 14, the avoidance hole 15 and the positioning hole 7 are internally provided with positioning bolts 16 in a penetrating manner, and the positioning bolts 16 are connected with positioning nuts 17; two sets of eccentric washers 13, relief holes 15, positioning bolts 16 and positioning nuts 17 are provided in the front wheel assembly.

When the connecting hole 6 is connected with the gear holes 5 on different heights, the mounting seat 4 can mount the rear wheel assembly on different heights through the quick-release device, so that users with different sizes can use the rear wheel assembly conveniently; after the rear wheel assembly is installed, the eccentric gasket 13 is installed in the strip-shaped groove 12 at a proper angle, and the orientation of the connecting cylinder 10 can be adjusted by utilizing the positioning bolt 16 and the positioning nut 17 to install the connecting through hole 14, the avoiding hole 15 and the positioning hole 7, so that the rotation axis of the connecting cylinder 10 approaches to be vertical to the ground when the wheelchair is stably placed on the ground, and the flexible use of the front wheel assembly is ensured.

The positioning hole 7 penetrates through the connecting rod 101, the axis of the connecting cylinder 10 is parallel to the plane of the connecting plate 11, and the axis of the connecting cylinder 10 is located on one side of the strip-shaped groove 12 in the plane of the connecting plate 11. The plane where the connecting plate 11 is located is close to the side face of the connecting cylinder 10 or tangent to the side face of the connecting cylinder 10, a user can assemble the connecting plate 11 forward or backward by utilizing the positioning holes 7 on the two sides of the connecting rod 101, the distance between the connecting cylinder 10 and the rear wheel assembly can be adjusted, the adjusting capability is higher, the rear wheel assembly can be installed on more heights, and the range of applicable people is increased. Preferably, the plane in which the web 11 lies is located between the axis and the tangential plane of the connecting cylinder 10.

The length direction of the connecting rod 101 and the length direction of the strip-shaped groove 12 are vertically arranged, and the top surface and the bottom surface of the connecting plate 11 are respectively flush with the top surface and the bottom surface of the connecting cylinder 10. The point of the connection between the connection plate 11 and the connection rod 101 is closer to the connection cylinder 10, so that the connection between the connection plate 11 and the connection rod 101 is more stable, and the occurrence of looseness is reduced;

the two side walls of the strip-shaped groove 12 are parallel to each other, the periphery Xiang Lunkuo of the eccentric gasket 13 is regular polygon, and the number of the side surfaces of the eccentric gasket 13 is even. The areas of the sides of the eccentric gaskets 13 are consistent, so that the stress of the eccentric gaskets 13 is more balanced. The eccentric washer 13 is preferably arranged in a regular hexagon as a whole.

Referring to fig. 1, 2 and 3, the number of gear holes 5 is at least three in the length direction of the vertical rod 102, the number of connecting holes 6 on a single connecting plate 11 is two, and the gear holes 5 and the connecting holes 6 are connected in pairs. Under the premise that the installation height of the connecting plate 11 can be adjusted, the connecting plate 11 and the vertical rod 102 are connected with each other through the two gear holes 5 and the two connecting holes 6, so that the connection firmness is enhanced, and the installation of the connecting plate 11 and the connecting cylinder 10 is more stable. Preferably, the gear holes 5 are vertically arranged in four, and the connecting plates 11 can be connected on the vertical rods 102 through the connecting holes 6 and the gear holes 5 which are connected in pairs, so that the mounting height of the rear wheel assembly is more.

Referring to fig. 1, 4, 5 and 6, a mounting cylinder 18 with two through ends is fixedly connected to a mounting seat 4, the quick-release device comprises a shaft sleeve 19, a shaft core 20, a spring 21, a button 22 and steel balls 23, a first annular bulge 24 which is in sliding connection with the shaft core 20 is arranged in the shaft sleeve 19, a second annular bulge 25 is arranged on the shaft core 20, the spring 21 is sleeved on the shaft core 20 and is abutted between the first annular bulge 24 and the second annular bulge 25, a clamping groove 26 for accommodating the steel balls 23 is arranged on the shaft core 20, a clamping hole 27 for accommodating the steel balls 23 is arranged on the shaft sleeve 19, the button 22 is arranged at one end, far away from the clamping groove 26, of the shaft core 20, a limit screw 28 is in threaded connection with one end, close to the clamping groove 26, of the shaft core 20, and an annular limit bulge 29 is arranged in the shaft sleeve 19; the shaft sleeve 19 is provided with a limit nut 30, the rear wheel assembly comprises a flower-drum barrel 31, and the flower-drum barrel 31 and the mounting barrel 18 are detachably connected between the limit nut 30 and the steel balls 23. After the button 22 is pressed, the clamping groove 26 is in butt joint with the clamping hole 27, the steel ball 23 can fall back into the clamping groove 26, and at the moment, a user can disconnect the shaft sleeve 19 and parts on the shaft sleeve from the mounting cylinder 18, so that the rear wheel assembly is unlocked from the frame 1, and the rear wheel assembly is more convenient to mount and dismount; the spring 21 can rebound the axle core 20 relative to the axle sleeve 19, and the longest elongation degree of the spring 21 can be limited by the limit screw 28 and the annular limit bulge 29, so that the steel ball 23 can realize the action of automatically extending outwards, thereby being more convenient to use.

At least two clamping holes 27 are arranged on the single shaft sleeve 19. The steel balls 23 are more uniformly stressed when being clamped with the mounting barrel 18, so that deformation of the steel balls 23 caused by overlarge local stress on the steel balls 23 is avoided, and the service life of the utility model is prolonged.

Referring to fig. 1, 2, 3, 4, 5 and 6, when the utility model is used, a user can firstly determine the installation height of the rear wheel assembly according to the body type of the user, then connect the rear wheel assembly by using the fastener connecting hole 6 and the gear hole 5 with proper height, then install the eccentric gaskets 13 between the strip-shaped grooves 12 after the two eccentric gaskets 13 face to proper angles, and finally connect the installation connecting perforation 14, the avoiding hole 15 and the positioning hole 7 by using the positioning bolt 16 and the positioning nut 17, so that the central axis trend of the connecting cylinder 10 is close to the vertical direction with the ground, and the front wheel assembly flexibly moves.

The foregoing description of the preferred embodiments of the present utility model should not be construed as limiting the scope of the utility model, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the utility model as defined by the description and drawings or as applied directly or indirectly to other related art.

Claims

1. The utility model provides an adjustable wheelchair, includes frame (1), cushion (2) and back (3), be connected with front wheel assembly and rear wheel assembly on frame (1), its characterized in that: the rear wheel assembly is provided with a quick-release device; the frame (1) comprises a connecting rod (101) and a vertical rod (102), wherein the vertical rod (102) is connected with a mounting seat (4) connected with the quick-release device, gear holes (5) and connecting holes (6) are respectively formed in the vertical rod (102) and the mounting seat (4), and the number of the gear holes (5) is at least two in the length direction of the vertical rod (102);

the connecting rod (101) is provided with a positioning hole (7), the front wheel assembly comprises a front wheel (8), an inclined front fork (9) and a connecting cylinder (10), the front wheel (8) is rotationally connected to the inclined front fork (9), the inclined front fork (9) is rotationally connected to the connecting cylinder (10), the side edge of the connecting cylinder (10) is provided with a connecting plate (11), the connecting plate (11) is provided with a strip-shaped groove (12), the strip-shaped groove (12) is connected with an eccentric gasket (13), two opposite side surfaces of the eccentric gasket (13) are in butt joint with the inner wall of the strip-shaped groove (12), a perforation (14) is eccentrically arranged on the eccentric gasket (13), a avoidance hole (15) is arranged in the strip-shaped groove (12), a positioning bolt (16) is arranged in the perforation (14), the avoidance hole (15) and the positioning hole (7), and the positioning bolt (16) is connected with a positioning nut (17); the eccentric gasket (13), the avoiding hole (15), the positioning bolt (16) and the positioning nut (17) are arranged in the front wheel assembly in two groups.

2. An adjustable wheelchair according to claim 1, characterized in that: the positioning hole (7) penetrates through the connecting rod (101), the axis of the connecting cylinder (10) is parallel to the plane where the connecting plate (11) is located, and the axis of the connecting cylinder (10) is located on one side of the strip-shaped groove (12) biased by the plane where the connecting plate (11) is located.

3. An adjustable wheelchair according to claim 1 or 2, characterized in that: the length direction of connecting rod (101) with the length direction of bar recess (12) is vertical setting, the top surface and the bottom surface of connecting plate (11) respectively with the top surface and the bottom surface parallel and level of connecting cylinder (10).

4. An adjustable wheelchair according to claim 3, characterized in that: the two side walls of the strip-shaped groove (12) are parallel to each other, the circumferential outline of the eccentric gasket (13) is regular polygon, and the number of the side surfaces of the eccentric gasket (13) is even.

5. An adjustable wheelchair according to claim 3, characterized in that: the number of the gear holes (5) is at least three in the length direction of the vertical rods (102), the number of the connecting holes (6) is two in each connecting plate (11), and the gear holes (5) are connected with the connecting holes (6) in pairs.

6. An adjustable wheelchair according to claim 1 or 2 or 4 or 5, characterized in that: the quick-release device comprises a shaft sleeve (19), a shaft core (20), a spring (21), a button (22) and steel balls (23), wherein the shaft sleeve (19) is internally provided with a first annular bulge (24) which is in sliding connection with the shaft core (20), the shaft core (20) is provided with a second annular bulge (25), the spring (21) is sleeved on the shaft core (20) and is abutted between the first annular bulge (24) and the second annular bulge (25), the shaft core (20) is provided with a clamping groove (26) for accommodating the steel balls (23), the shaft sleeve (19) is provided with a clamping hole (27) for accommodating the steel balls (23), the button (22) is arranged at one end, far away from the clamping groove (26), of the shaft core (20), one end, close to the clamping groove (26), of the shaft core (20) is connected with a limit screw (28) in a threaded manner, and the shaft sleeve (19) is internally provided with a limit screw (29); be provided with stop nut (30) on axle sleeve (19), the rear wheel assembly includes flower drum section of thick bamboo (31), flower drum section of thick bamboo (31) with install section of thick bamboo (18) can dismantle connect in between stop nut (30) with steel ball (23).

7. An adjustable wheelchair according to claim 6, wherein: at least two clamping holes (27) are formed in the single shaft sleeve (19).