CN210019981U - Wheelchair for single-hand use - Google Patents

Abstract

The utility model belongs to the technical field of wheel chairs, in particular to a wheel chair used by one hand, which comprises a wheel chair frame, a driving mechanism, rear wheels and a front wheel mechanism, wherein a supporting wheel shaft is arranged at the rear lower side of the wheel chair frame, and two rear wheels are symmetrically arranged at two ends of the supporting wheel shaft; two front wheel mechanisms with the function of controlling the wheelchair to turn are symmetrically arranged at the front lower side of the wheelchair frame; the driving mechanism is arranged on the wheelchair frame and controls the walking and steering of the wheelchair; the driving mechanism of the wheelchair is designed on one side, a user can control the walking and steering of the wheelchair only by driving one arm, the wheelchair is designed to be convenient for a patient with one injured arm of two arms, the driving mechanism of the wheelchair can be designed on the left side and the right side, and the wheelchair suitable for the user is selected according to different states of the patient; compared with the traditional wheelchair with two arms driving the rear wheels to walk and turn, the wheelchair is more convenient to use and has wider application range.

Description

Wheelchair for single-hand use

Technical Field

The utility model belongs to the technical field of medical instrument, especially, relate to a wheelchair that one hand used.

Background

With the development of aging society and the increase of various occupational diseases of people, the requirements on the use of the wheelchair are more and more extensive, so the performance of the wheelchair is continuously improved; however, for those users who really need the wheelchair, most users commonly have the problems of muscle weakness, nerve loss in certain parts of the body, or insensitivity, etc., and particularly, the current wheelchair needs the user to drive the wheelchair to walk by simultaneously rotating the rear wheel through two arms, so that for patients with single-arm injuries, the wheelchair is required to be used. The utility model relates to a wheelchair used by one hand, which solves the problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the above defects in the prior art, the utility model discloses a wheelchair for single-handed use, which is realized by adopting the following technical scheme.

In the description of the present invention, it should be noted that the terms "inside", "below", "upper" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed or operated in a specific position, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

A wheelchair for one-handed use, comprising: the wheelchair comprises a wheelchair frame, a driving mechanism, rear wheels, a front wheel mechanism, a supporting wheel shaft and second supports, wherein the supporting wheel shaft is arranged at the rear lower side of the wheelchair frame through the two symmetrically distributed second supports, and the two rear wheels are symmetrically arranged at two ends of the supporting wheel shaft; two front wheel mechanisms with the function of controlling the wheelchair to turn are symmetrically arranged at the front lower side of the wheelchair frame; the driving mechanism is arranged on the wheelchair frame, and the driving mechanism drives the rear wheel to rotate on one hand to drive the wheelchair to advance, and drives the front wheel mechanism to swing on the other hand to control the wheelchair to steer.

The driving mechanism comprises a C-shaped plate, a rotating shaft, a driving handle, a first sun wheel, a third support, a second gear, a second sun wheel, a semicircular hollow shell, a trapezoidal ring guide block, a mounting square block, a first rotating shaft, a second rotating shaft, a trapezoidal ring guide groove, a guide support, a gear shaft, a first gear ring, a first star wheel, a second star wheel and a second gear ring, wherein a square hole which is communicated up and down is formed in the position, close to the front end, of the right handrail of the wheelchair frame; the lower end of the semicircular hollow shell is an opening end, a semicircular groove which is communicated with the inside and the outside is formed in the circular surface of the semicircular hollow shell, the semicircular groove is used for driving the driving handle to rotate around the rotating shaft when the wheelchair turns, and the semicircular groove can prevent the first rotating shaft from interfering with the semicircular hollow shell when the driving handle drives the first rotating shaft to rotate; the semicircular hollow shell is arranged on the right handrail of the wheelchair frame, and the opening end of the semicircular hollow shell is communicated with the square hole on the wheelchair frame; the upper end and the lower end of the rotating shaft are respectively arranged in a channel formed by a square hole and a semicircular hollow shell on the wheelchair frame through two third supports; the rotating shaft is in running fit with the third support; the mounting block is mounted at the upper end of the rotating shaft; the mounting block is provided with a shaft hole; one end of the first rotating shaft is arranged in a shaft hole on the mounting block, and the other end of the first rotating shaft penetrates through a semicircular groove formed in the semicircular hollow shell and is positioned outside the semicircular hollow shell; the driving handle is arranged at one end of the first rotating shaft, which is positioned at the outer side of the semicircular hollow shell.

The first sun gear is arranged on the rotating shaft, a bevel gear end is arranged on the first sun gear, and the first rotating shaft rotates to drive the first sun gear to rotate; the lower side surface of the C-shaped groove on the C-shaped plate is provided with a trapezoidal ring guide groove, and the upper end of the C-shaped plate is arranged on the wheelchair frame; three gear shafts are uniformly arranged on the upper side surface of the trapezoidal ring guide block in the circumferential direction, and the three gear shafts are arranged on the C-shaped plate through the rotational fit of the trapezoidal ring guide block and the trapezoidal ring guide groove; the function of the ladder-shaped ring guide block and the ladder-shaped ring guide groove is to play a role in guiding the revolution of the three first star wheels and the three second star wheels; the three first star wheels are respectively arranged at the upper ends of the three gear shafts and are respectively meshed with the first sun wheel; the first gear ring is arranged on the C-shaped plate through a guide support, the lower side of the first gear ring is provided with bevel teeth, and the first gear ring is meshed with the three first star wheels respectively; the second sun wheel is arranged on the rotating shaft, the three second star wheels are respectively arranged at the lower ends of the three gear shafts, and the three second star wheels are respectively meshed with the second sun wheel; the second gear ring is fixedly arranged on the lower side surface of the C-shaped groove on the C-shaped plate, and the second gear ring is respectively meshed with the three second star wheels; the inner diameter of the second gear ring is equal to the inner diameter of the first gear ring, the diameters of the first star wheel and the second star wheel are equal, and the diameters of the first sun wheel and the second sun wheel are equal; in the process of linear walking of the wheelchair, the first rotating shaft is driven to rotate through the driving handle, the first rotating shaft rotates to drive the first sun gear to rotate, and because the rotating shaft is fixed and does not move, the second sun gear is in a static state, and the second gear ring is fixed and is also in a static state by the C-shaped plate, in the state, the rotation and revolution of the three second star gears are in the static state, namely the three gear shafts are also in the static state and cannot rotate around the axis of the second gear ring; in this state, when the first sun gear rotates, the first sun gear can drive the three first star wheels to rotate, the three first star wheels rotate to drive the first gear ring to rotate, and the first gear ring rotates to drive the rear wheel to rotate, so that the wheelchair can travel linearly; in the process of steering the wheelchair, the driving handle drives the first rotating shaft to rotate around the axis of the rotating shaft, the first rotating shaft drives the rotating shaft to rotate, the rotating shaft rotates to drive the second sun gear to rotate on one hand and drive the second gear to rotate around the axis of the rotating shaft on the other hand, when the second gear rotates around the axis of the rotating shaft, the second gear drives the first sun gear meshed with the second gear to rotate, the first sun gear rotates to drive the three first star wheels to rotate, but when the second sun gear rotates, the second sun gear drives the three second star wheels to rotate, and as the second gear ring is fixed by the C-shaped plate, the three second star wheels can revolve around the second gear ring while rotating, and the three second star wheels can drive the three gear shafts to revolve around the second gear ring; the three gear shafts can drive the three first star wheels to revolve around the second gear ring in a revolution way around the second gear ring; the rotation of the three first star wheels is offset through the revolution of the three first star wheels, so that the first gear ring is not influenced by the rotation of the rotating shaft in the state.

The first gear ring rotates to control the rotation of the support wheel shaft; the rotation of the rotating shaft controls the steering of the two front wheel mechanisms.

As a further improvement of the technology, the front wheel mechanism comprises a mounting rod, a front wheel frame, a rotating shaft, a front wheel and a supporting rotating shaft, wherein the mounting rod is mounted at the front lower side of the wheelchair frame; the rotating shaft is arranged on the mounting rod in a rotating fit manner; the front wheel carrier is arranged on the lower side of the rotating shaft; the front wheel is arranged on the front wheel frame through a supporting rotating shaft; the rotating shaft drives the front wheel to rotate relative to the mounting rod.

As a further improvement of the technology, a first synchronizing wheel is arranged at the lower end of the rotating shaft, and a second synchronizing wheel is arranged on a rotating shaft in the right front wheel mechanism of the two front wheel mechanisms; the first synchronizing wheel is connected with the second synchronizing wheel through a first synchronizing belt; the two swing plates are connected through a connecting plate, and two ends of the connecting plate are respectively connected with the corresponding swing plates through rotating fit; the diameters of the first synchronous wheel and the second synchronous wheel are the same; when the rotating shaft rotates, the rotating shaft can drive a first synchronous wheel arranged on the rotating shaft to rotate, the first synchronous wheel rotates to drive a second synchronous wheel to rotate through a first synchronous belt, the second synchronous wheel rotates to drive a rotating shaft arranged in one front wheel mechanism arranged on the rotating shaft to rotate, the rotating shaft rotates to drive a front wheel arranged on the lower side of the rotating shaft to rotate, meanwhile, the rotating shaft rotates to drive a swing plate arranged on the rotating shaft to swing around the rotating shaft, the swing plate arranged on the swing shaft swings to drive a swing plate arranged on the other front wheel mechanism to swing around a rotating shaft corresponding to the swing plate through a connecting plate, the swing plate on the other front wheel mechanism swings to drive a rotating shaft arranged on the other front wheel mechanism to rotate, the rotating shaft rotates to drive the front wheel arranged on the swing plate; the utility model discloses well first synchronizing wheel is the same with the diameter of second synchronizing wheel, and rotation axis pivoted angle is the same with two front wheel pivoted angles promptly.

As a further improvement of the present technique, the first chain wheel is mounted on a support wheel axle; the third rotating shaft is arranged at the lower side of the wheelchair frame through two first supports; the second chain wheel is arranged at one end of the third rotating shaft, and the second chain wheel is connected with the first chain wheel through a chain; the first gear is arranged at the other end of the third rotating shaft and is a bevel gear; the first gear is meshed with the bevel gear on the first gear ring; when the first gear ring rotates, the first gear ring can drive a first gear meshed with the first gear ring to rotate, the first gear rotates to drive a third rotating shaft to rotate, the third rotating shaft rotates to drive a second chain wheel installed on the third rotating shaft to rotate, the second chain wheel rotates to drive a first chain wheel to rotate through a chain, the first chain wheel rotates to drive a supporting wheel shaft to rotate, and the supporting wheel shaft rotates to drive two rear wheels to rotate, so that the wheelchair can walk.

As a further improvement of the technology, the holding rod of the driving handle is provided with a leather sheath, which is convenient for a user to operate and can not slip with the holding rod.

As a further improvement of the technology, a brake plate is arranged on the driving handle, a brake mechanism is arranged on the rear wheel, and the brake plate controls the brake mechanism on the rear wheel through a brake rope; the brake mechanism is controlled through the brake plate, so that the brake mechanism brakes the wheelchair.

As a further improvement of the present technology, the first sun gear is mounted on the rotating shaft through a fixing sleeve, and the fixing sleeve is in a rotating fit with the rotating shaft, but the fixing sleeve does not slide up and down relative to the rotating shaft.

As a further improvement of the technology, the rotating shaft and the third support are connected through the matching of the annular guide block and the annular guide groove.

As a further improvement of the technology, the third synchronizing wheel is installed on the first rotating shaft, and the lower end of the rotating shaft is provided with an installation block; the mounting block is provided with a shaft hole; one end of the second rotating shaft is arranged in a shaft hole on an installation square block positioned at the lower end of the rotating shaft; the fourth synchronous wheel is arranged on the second rotating shaft and is connected with the third synchronous wheel through a second synchronous belt; the second gear is a bevel gear and is arranged on the second rotating shaft; the first sun gear is provided with a bevel gear end, and the second gear is meshed with the bevel gear end on the first sun gear; when the first rotating shaft rotates, the first rotating shaft can drive a third synchronous wheel arranged on the first rotating shaft to rotate, the third synchronous wheel rotates to drive a fourth synchronous wheel to rotate through a second synchronous belt, the fourth synchronous wheel rotates to drive a second rotating shaft to rotate, the second rotating shaft rotates to drive a second gear to rotate, and the second gear rotates to drive a first sun gear meshed with the second gear to rotate.

As a further improvement of the present technology, the third synchronous pulley and the fourth synchronous pulley are replaced by a third chain pulley and a fourth chain pulley, the second synchronous pulley is replaced by a chain, and the third chain pulley and the fourth chain pulley are connected by a chain.

Compared with the traditional wheelchair technology, the wheelchair of the utility model has the advantages that the driving mechanism is designed on one side, the user can control the walking and steering of the wheelchair only by driving the wheelchair with one arm, the wheelchair is designed to be convenient for the patient with one arm injured in two arms, the driving mechanism can be designed on the left side and the right side, and the wheelchair suitable for the user can be selected according to different states of the patient; compared with the traditional wheelchair with two arms driving the rear wheels to walk and turn, the wheelchair is more convenient to use and has wider application range.

Drawings

Fig. 1 is an external view of an entire part.

Fig. 2 is a schematic view of the overall component distribution.

FIG. 3 is a schematic view of the rear wheel and front wheel assembly installation.

FIG. 4 is a schematic diagram of the front wheel mechanism.

Fig. 5 is a schematic view of the structure of the wheelchair frame.

Fig. 6 is a schematic view of the driving mechanism.

FIG. 7 is a schematic view of the pendulum plate and connecting plate installation.

Fig. 8 is a schematic view of the rotation shaft installation.

Fig. 9 is a third synchronizing wheel mounting schematic.

Fig. 10 is a schematic view of the installation of the ladder ring guide.

Fig. 11 is a schematic view of a semi-circular hollow shell structure.

Fig. 12 is a schematic view of an installation block.

Figure 13 is a second timing belt installation schematic.

Fig. 14 is a schematic view of a C-shaped plate configuration.

FIG. 15 is a gear shaft mounting schematic.

Fig. 16 is a schematic view of the first and second sun gears.

Fig. 17 is a schematic view of the engagement of the first sun gear and the second gear.

Fig. 18 is a schematic view of the engagement of the second sun gear and the second star gear.

FIG. 19 is a schematic view of a first ring gear and a first carat mesh.

Fig. 20 is a schematic view of the drive handle structure.

Fig. 21 is a first ring gear mounting diagram.

Fig. 22 is a schematic view of a guide support structure.

Number designation in the figures: 1. a wheelchair frame; 2. a drive mechanism; 3. a rear wheel; 4. a front wheel mechanism; 5. supporting the wheel axle; 6. mounting a rod; 7. a front wheel carrier; 8. a rotating shaft; 9. a front wheel; 10. a support shaft; 11. a square hole; 12. a first support; 13. a chain; 14. a second synchronizing wheel; 15. a first chain wheel; 16. a second support; 17. a second chain wheel; 18. a first synchronization belt; 19. a first synchronizing wheel; 20. a C-shaped plate; 21. a rotating shaft; 22. a second synchronous belt; 23. a drive handle; 24. a swinging plate; 25. a connecting plate; 26. a first sun gear; 27. a third support; 28. a third synchronizing wheel; 29. a second gear; 30. a second sun gear; 31. a semi-circle hollow shell; 32. a brake plate; 33. a fourth synchronizing wheel; 34. a ladder-shaped ring guide block; 35. installing a square block; 36. a shaft hole; 37. a first rotating shaft; 38. a second rotating shaft; 39. a ladder ring guide groove; 40. a circular hole; 41. a gear shaft; 42. fixing a sleeve; 43. a first ring gear; 44. a first star wheel; 45. a second star wheel; 46. a second ring gear; 47. a third rotating shaft; 48. a first gear; 49. a holding rod; 50. a leather sheath; 51. a semicircular groove; 52. and (4) guiding and supporting.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples or figures are intended to illustrate the invention, but are not intended to limit the scope of the invention.

As shown in fig. 1 and 2, it comprises a wheelchair frame 1, a driving mechanism 2, a rear wheel 3, a front wheel mechanism 4, a supporting wheel axle 5 and a second support 16, wherein as shown in fig. 3, the supporting wheel axle 5 is installed at the rear lower side of the wheelchair frame 1 through two symmetrically distributed second supports 16, and two rear wheels 3 are symmetrically installed at two ends of the supporting wheel axle 5; two front wheel mechanisms 4 with the function of controlling the wheelchair to turn are symmetrically arranged at the front lower side of the wheelchair frame 1; as shown in fig. 1, a driving mechanism 2 is mounted on a wheelchair frame 1, and the driving mechanism 2 drives a rear wheel 3 to rotate and drive the wheelchair to move forward, and the driving mechanism 2 drives a front wheel mechanism 4 to swing and control the steering of the wheelchair.

As shown in fig. 6, the driving mechanism 2 includes a C-shaped plate 20, a rotating shaft 21, a driving handle 23, a first sun gear 26, a third support 27, a second gear 29, a second sun gear 30, a semicircular hollow shell 31, a ladder-shaped ring guide 34, a mounting block 35, a first rotating shaft 37, a second rotating shaft 38, a ladder-shaped ring guide 39, a guide support 52, a gear shaft 41, a first ring gear 43, a first star gear 44, a second star gear 45, and a second ring gear 46, wherein as shown in fig. 5, a square hole 11 penetrating vertically is formed in a position near the front end of the right armrest of the wheelchair frame 1; as shown in fig. 11, the lower end of the semi-circular hollow shell 31 is an open end, a semi-circular groove 51 which is communicated with the inside and the outside is formed on the circular surface of the semi-circular hollow shell 31, the semi-circular groove 51 is used for driving the driving handle 23 to rotate around the rotating shaft 21 when the wheelchair turns, and the semi-circular groove 51 can prevent the first rotating shaft 37 from interfering with the semi-circular hollow shell 31 when the driving handle 23 drives the first rotating shaft 37 to rotate; as shown in fig. 1, a semicircular hollow shell 31 is installed on the right armrest of the wheelchair frame 1, and the open end of the semicircular hollow shell 31 is communicated with the square hole 11 on the wheelchair frame 1; as shown in fig. 8 and 12, the upper and lower ends of the rotating shaft 21 are respectively installed in the passage formed by the square hole 11 and the semi-circular hollow shell 31 on the wheelchair frame 1 through two third supports 27; the rotating shaft 21 is in rotating fit with the third support 27; as shown in fig. 12, a mounting block 35 is mounted on the upper end of the rotating shaft 21; the mounting block 35 is provided with a shaft hole 36; as shown in fig. 13, one end of the first rotating shaft 37 is installed in the shaft hole 36 of the mounting block 35, and the other end of the first rotating shaft 37 passes through the semicircular slot 51 formed in the semicircular hollow shell 31 and is located outside the semicircular hollow shell 31; as shown in fig. 6 and 9, the driving handle 23 is mounted on the first rotating shaft 37 at one end outside the semi-circular hollow shell 31.

As shown in fig. 10, the first sun gear 26 is mounted on the rotating shaft 21, as shown in fig. 17, the first sun gear 26 has a tapered end, and the first rotating shaft 37 rotates to drive the first sun gear 26 to rotate; as shown in fig. 14, the lower side of the C-shaped groove on the C-shaped plate 20 is provided with a trapezoidal ring guide groove 39, and the upper end of the C-shaped plate 20 is mounted on the wheelchair frame 1; as shown in fig. 15, three gear shafts 41 are circumferentially and uniformly mounted on the upper side surface of the ladder-shaped ring guide 34, and as shown in fig. 10 and 16, the three gear shafts 41 are mounted on the C-shaped plate 20 by the running fit of the ladder-shaped ring guide 34 and the ladder-shaped ring guide groove 39; the function of the ladder-shaped ring guide block 34 and the ladder-shaped ring guide groove 39 is to guide the revolution of the three first star wheels 44 and the three second star wheels 45; as shown in fig. 16, three first star wheels 44 are respectively mounted on the upper ends of the three gear shafts 41, and as shown in fig. 17, the three first star wheels 44 are respectively meshed with the first sun gear 26; as shown in fig. 21 and 22, the first ring gear 43 is mounted on the C-shaped plate 20 through a guide support 52, as shown in fig. 17, the lower side of the first ring gear 43 is provided with a bevel gear, and the first ring gear 43 is engaged with the three first star gears 44 respectively; as shown in fig. 10, the second sun gear 30 is mounted on the rotating shaft 21, and as shown in fig. 16, three second star wheels 45 are respectively mounted on the lower ends of the three gear shafts 41, and the three second star wheels 45 are respectively engaged with the second sun gear 30; as shown in fig. 10, the second ring gear 46 is fixedly mounted on the lower side of the C-shaped groove of the C-shaped plate 20, and as shown in fig. 18, the second ring gear 46 is engaged with the three second star gears 45; the inner diameter of the second ring gear 46 is equal to the inner diameter of the first ring gear 43, the diameters of the first star wheel 44 and the second star wheel 45 are equal, and the diameters of the first sun gear 26 and the second sun gear 30 are equal; during the straight walking of the wheelchair, the driving handle 23 drives the first rotating shaft 37 to rotate, the first rotating shaft 37 rotates to drive the first sun gear 26 to rotate, and because the rotating shaft 21 is fixed, the second sun gear 30 is in a static state, and the second gear ring 46 is fixed by the C-shaped plate 20 and is also in a static state during the straight walking of the wheelchair, in this state, the rotation and revolution of the three second star gears 45 are in a static state, that is, the three gear shafts 41 are also in a static state and cannot rotate around the axis of the second gear ring 46; in this state, when the first sun gear 26 rotates, the first sun gear 26 drives the three first star gears 44 to rotate, the three first star gears 44 rotate to drive the first gear ring 43 to rotate, and the first gear ring 43 rotates to drive the rear wheel 3 to rotate, so that the wheelchair can travel linearly; during the steering process of the wheelchair, the driving handle 23 drives the first rotating shaft 37 to rotate around the axis of the rotating shaft 21, the first rotating shaft 37 rotates to drive the rotating shaft 21 to rotate, the rotating shaft 21 rotates to drive the second sun gear 30 to rotate on the one hand and drive the second gear 29 to rotate around the axis of the rotating shaft 21 on the other hand, when the second gear 29 rotates around the axis of the rotating shaft 21, the second gear 29 will rotate the first sun gear 26 engaged with the second gear, the first sun gear 26 will rotate the three first star gears 44, however, when the second sun gear 30 rotates, the second sun gear 30 drives the three second star gears 45 to rotate, since the second ring gear 46 is fixed by the C-shaped plate 20, the three second star gears 45 revolve around the second ring gear 46 while rotating, and the revolution of the three second star gears 45 around the second ring gear 46 drives the three gear shafts 41 to revolve around the second ring gear 46; the revolution of the three gear shafts 41 around the second ring gear 46 drives the revolution of the three first star wheels 44 around the second ring gear 46; the rotation of the three first star wheels 44 is offset by the revolution of the three first star wheels 44, so that the first ring gear 43 is not affected by the rotation of the rotary shaft 21 in this state.

The first gear ring 43 controls the rotation of the supporting wheel shaft 5; the rotation shaft 21 controls the two front wheel mechanisms 4 to rotate.

In summary, the following steps:

the utility model discloses a beneficial effect: the driving mechanism 2 of the wheelchair is designed on a single side, a user can control the walking and steering of the wheelchair only by single-arm driving, the wheelchair is designed to be convenient for a patient with one injured arm of two arms to use, the driving mechanism 2 of the wheelchair can be designed on the left side and the right side, and the wheelchair suitable for the user is selected according to different states of the patient; compared with the traditional wheelchair which can only walk and turn by driving the rear wheels 3 by two arms, the wheelchair is more convenient to use and has wider application range.

As shown in fig. 4, the front wheel mechanism 4 comprises a mounting rod 6, a front wheel frame 7, a rotating shaft 8, a front wheel 9 and a supporting rotating shaft 10, wherein the mounting rod 6 is mounted at the front lower side of the wheelchair frame 1; the rotating shaft 8 is arranged on the mounting rod 6 in a rotating fit manner; the front wheel carrier 7 is arranged at the lower side of the rotating shaft 8; the front wheel 9 is arranged on the front wheel frame 7 through a supporting rotating shaft 10; the rotating shaft 8 drives the front wheel 9 to rotate relative to the mounting rod 6.

As shown in fig. 8, one first synchronizing wheel 19 is mounted on the lower end of the rotating shaft 21, and as shown in fig. 7, one second synchronizing wheel 14 is mounted on the rotating shaft 8 of one of the two front wheel mechanisms 4 located on the right side; as shown in fig. 6, the first synchronizing wheel 19 and the second synchronizing wheel 14 are connected by a first timing belt 18; as shown in fig. 7, the rotating shafts 8 in the two front wheel mechanisms 4 are respectively provided with a swing plate 24 through a rotating fit, the two swing plates 24 are connected through a connecting plate 25, and two ends of the connecting plate 25 are respectively connected with the corresponding swing plates 24 through a rotating fit; the first synchronizing wheel 19 and the second synchronizing wheel 14 have the same diameter; when the rotating shaft 21 rotates, the rotating shaft 21 drives the first synchronizing wheel 19 mounted thereon to rotate, the first synchronizing wheel 19 rotates to drive the second synchronizing wheel 14 to rotate through the first synchronous belt 18, the second synchronizing wheel 14 rotates to drive the rotating shaft 8 in one front wheel mechanism 4 mounted thereon to rotate, the rotating shaft 8 rotates to drive the front wheel 9 mounted on the lower side thereof to rotate, meanwhile, the rotating shaft 8 rotates to drive the swing plate 24 mounted thereon to swing around the rotating shaft 8, the swing plate 24 mounted thereon swings to drive the swing plate 24 mounted on the other front wheel mechanism 4 to swing around the rotating shaft 8 corresponding thereto through the connecting plate 25, the swing plate 24 on the other front wheel mechanism 4 swings to drive the rotating shaft 8 mounted thereon to rotate, the rotating shaft 8 rotates to drive the front wheel 9 mounted thereon to rotate, namely, the two front wheels 9 simultaneously rotate; the utility model discloses well first synchronizing wheel 19 is the same with the diameter of second synchronizing wheel 14, and rotation axis 21 pivoted angle is the same with two front wheel 9 pivoted angles promptly.

As shown in fig. 6, the first chaining wheel 15 is mounted on the supporting wheel axle 5; the third rotating shaft 47 is installed at the lower side of the wheelchair frame 1 through two first supports 12; as shown in fig. 19, the second chaining wheel 17 is installed at one end of the third rotating shaft 47, and as shown in fig. 6, the second chaining wheel 17 and the first chaining wheel 15 are connected by the chain 13; the first gear 48 is installed at the other end of the third rotating shaft 47, and the first gear 48 is a bevel gear; as shown in fig. 19, the first gear 48 meshes with the bevel gear on the first ring gear 43; when the first gear ring 43 rotates, the first gear ring 43 drives the first gear 48 engaged with the first gear ring to rotate, the first gear 48 rotates to drive the third rotating shaft 47 to rotate, the third rotating shaft 47 rotates to drive the second chain wheel 17 installed on the third rotating shaft to rotate, the second chain wheel 17 rotates to drive the first chain wheel 15 to rotate through the chain 13, the first chain wheel 15 rotates to drive the supporting wheel shaft 5 to rotate, and the supporting wheel shaft 5 rotates to drive the two rear wheels 3 to rotate, so that the wheelchair can walk.

As shown in FIG. 20, the grip 49 of the driving handle 23 is provided with a leather sheath 50 for the user to operate without slipping with the grip 49.

As shown in fig. 9 and 20, the brake plate 32 is mounted on the driving handle 23, the brake mechanism is provided on the rear wheel 3, and the brake plate 32 controls the brake mechanism on the rear wheel 3 through the brake cable; the brake mechanism is controlled by the brake plate 32 so that the brake mechanism brakes the wheelchair.

As shown in fig. 10 and 16, the first sun gear 26 is attached to the rotary shaft 21 via a fixing sleeve 42, and the fixing sleeve 42 is rotatably engaged with the rotary shaft 21, but the fixing sleeve 42 does not slide up and down with respect to the rotary shaft 21.

The rotating shaft 21 and the third support 27 are connected with each other by matching the annular guide block and the annular guide groove.

As shown in fig. 9, the third synchronizing wheel 28 is mounted on the first rotating shaft 37, and as shown in fig. 8 and 12, a mounting block 35 is mounted at the lower end of the rotating shaft 21; the mounting block 35 is provided with a shaft hole 36; as shown in fig. 13, one end of the second rotating shaft 38 is mounted in the shaft hole 36 of the mounting block 35 located at the lower end of the rotating shaft 21; as shown in fig. 13, the fourth synchronizing wheel 33 is mounted on the second rotating shaft 38, and the fourth synchronizing wheel 33 is connected with the third synchronizing wheel 28 through the second timing belt 22; as shown in fig. 17, the second gear 29 is a bevel gear, and as shown in fig. 9, the second gear 29 is mounted on the second rotating shaft 38; as shown in fig. 17, the first sun gear 26 has a bevel end thereon, and the second gear 29 meshes with the bevel end on the first sun; when the first rotating shaft 37 rotates, the first rotating shaft 37 drives the third synchronizing wheel 28 mounted thereon to rotate, the third synchronizing wheel 28 rotates to drive the fourth synchronizing wheel 33 to rotate through the second synchronizing belt 22, the fourth synchronizing wheel 33 rotates to drive the second rotating shaft 38 to rotate, the second rotating shaft 38 rotates to drive the second gear 29 to rotate, and the second gear 29 rotates to drive the first sun gear 26 engaged therewith to rotate.

The third synchronous pulley 28 and the fourth synchronous pulley 33 are replaced by a third chain 13 pulley and a fourth chain 13 pulley, the second synchronous belt 22 is replaced by a chain 13, and the third chain 13 pulley and the fourth chain 13 pulley are connected through the chain 13.

When the wheelchair designed by the utility model is used, when the wheelchair needs to walk, the first rotating shaft 37 is controlled to rotate by driving the driving handle 23, the first rotating shaft 37 can drive the third synchronizing wheel 28 mounted thereon to rotate, the third synchronizing wheel 28 rotates to drive the fourth synchronizing wheel 33 to rotate through the second synchronous belt 22, the fourth synchronizing wheel 33 rotates to drive the second rotating shaft 38 to rotate, the second rotating shaft 38 rotates to drive the second gear 29 to rotate, and the second gear 29 rotates to drive the first sun gear 26 meshed with the second gear to rotate; the first sun wheel 26 can drive the three first star wheels 44 to rotate, the three first star wheels 44 rotate to drive the first gear ring 43 to rotate, the first gear ring 43 can drive the first gear 48 meshed with the first gear ring to rotate, the first gear 48 rotates to drive the third rotating shaft 47 to rotate, the third rotating shaft 47 rotates to drive the second chain wheel 17 mounted on the third rotating shaft to rotate, the second chain wheel 17 rotates to drive the first chain wheel 15 to rotate through the chain 13, the first chain wheel 15 rotates to drive the supporting wheel shaft 5 to rotate, and the supporting wheel shaft 5 rotates to drive the two rear wheels 3 to rotate, so that the wheelchair can walk; when steering is needed, the driving handle 23 is manually driven to enable the driving handle 23 to drive the first rotating shaft 37 to rotate around the rotating shaft 21, the first rotating shaft 37 rotates to drive the rotating shaft 21 to rotate, the rotating shaft 21 drives the first synchronous wheel 19 mounted on the rotating shaft to rotate, the first synchronous wheel 19 rotates to drive the second synchronous wheel 14 to rotate through the first synchronous belt 18, the second synchronous wheel 14 rotates to drive the rotating shaft 8 in one front wheel mechanism 4 mounted on the second synchronous wheel to rotate, the rotating shaft 8 rotates to drive the front wheel 9 mounted on the lower side of the rotating shaft 8 to rotate, meanwhile, the rotating shaft 8 rotates to drive the swinging plate 24 mounted on the rotating shaft 8 to swing around the rotating shaft 8, the swinging plate 24 mounted on the rotating shaft 24 drives the swinging plate 24 mounted on the other front wheel mechanism 4 to swing around the rotating shaft 8 corresponding to the rotating shaft 8 through the connecting plate 25, and the swinging plate 24 on the other front, the rotating shaft 8 rotates to drive the front wheels 9 arranged on the rotating shaft to rotate, namely the two front wheels 9 rotate simultaneously; the steering function is realized.

Claims (3)

1. A wheelchair for one-handed use, comprising: the wheelchair comprises a wheelchair frame, a driving mechanism, rear wheels, a front wheel mechanism, a supporting wheel shaft and second supports, wherein the supporting wheel shaft is arranged at the rear lower side of the wheelchair frame through the two symmetrically distributed second supports, and the two rear wheels are symmetrically arranged at two ends of the supporting wheel shaft; two front wheel mechanisms with the function of controlling the wheelchair to turn are symmetrically arranged at the front lower side of the wheelchair frame; the driving mechanism is arranged on the wheelchair frame, and on one hand, the driving mechanism drives the rear wheel to rotate to drive the wheelchair to move forward, and on the other hand, the driving mechanism drives the front wheel mechanism to swing to control the wheelchair to steer;

the driving mechanism comprises a C-shaped plate, a rotating shaft, a driving handle, a first sun wheel, a third support, a second gear, a second sun wheel, a semicircular hollow shell, a trapezoidal ring guide block, a mounting square block, a first rotating shaft, a second rotating shaft, a trapezoidal ring guide groove, a guide support, a gear shaft, a first gear ring, a first star wheel, a second star wheel and a second gear ring, wherein a square hole which is communicated up and down is formed in the position, close to the front end, of the right handrail of the wheelchair frame; the lower end of the semicircular hollow shell is an opening end, a semicircular groove which is communicated with the inside and the outside is formed in the circular surface of the semicircular hollow shell, the semicircular hollow shell is arranged on the right handrail of the wheelchair frame, and the opening end of the semicircular hollow shell is communicated with the square hole in the wheelchair frame; the upper end and the lower end of the rotating shaft are respectively arranged in a channel formed by a square hole and a semicircular hollow shell on the wheelchair frame through two third supports; the rotating shaft is in running fit with the third support; the mounting block is mounted at the upper end of the rotating shaft; the mounting block is provided with a shaft hole; one end of the first rotating shaft is arranged in a shaft hole on the mounting block, and the other end of the first rotating shaft penetrates through a semicircular groove formed in the semicircular hollow shell and is positioned outside the semicircular hollow shell; the driving handle is arranged at one end of the first rotating shaft, which is positioned at the outer side of the semicircular hollow shell;

the first sun gear is arranged on the rotating shaft, a bevel gear end is arranged on the first sun gear, and the first rotating shaft rotates to drive the first sun gear to rotate; the lower side surface of the C-shaped groove on the C-shaped plate is provided with a trapezoidal ring guide groove, and the upper end of the C-shaped plate is arranged on the wheelchair frame; three gear shafts are uniformly arranged on the upper side surface of the trapezoidal ring guide block in the circumferential direction, and the three gear shafts are arranged on the C-shaped plate through the rotational fit of the trapezoidal ring guide block and the trapezoidal ring guide groove; the three first star wheels are respectively arranged at the upper ends of the three gear shafts and are respectively meshed with the first sun wheel; the first gear ring is arranged on the C-shaped plate through a guide support, the lower side of the first gear ring is provided with bevel teeth, and the first gear ring is meshed with the three first star wheels respectively; the second sun wheel is arranged on the rotating shaft, the three second star wheels are respectively arranged at the lower ends of the three gear shafts, and the three second star wheels are respectively meshed with the second sun wheel; the second gear ring is fixedly arranged on the lower side surface of the C-shaped groove on the C-shaped plate, and the second gear ring is respectively meshed with the three second star wheels; the inner diameter of the second gear ring is equal to the inner diameter of the first gear ring, the diameters of the first star wheel and the second star wheel are equal, and the diameters of the first sun wheel and the second sun wheel are equal;

the first gear ring rotates to control the rotation of the support wheel shaft; the rotation of the rotating shaft controls the steering of the two front wheel mechanisms.

2. A wheelchair for one-handed use according to claim 1, wherein: the front wheel mechanism comprises an installation rod, a front wheel frame, a rotating shaft, a front wheel and a supporting rotating shaft, wherein the installation rod is installed at the front lower side of the wheelchair frame; the rotating shaft is arranged on the mounting rod in a rotating fit manner; the front wheel carrier is arranged on the lower side of the rotating shaft; the front wheel is arranged on the front wheel frame through a supporting rotating shaft.

3. A wheelchair for one-handed use according to claim 1, wherein: a first synchronizing wheel is installed at the lower end of the rotating shaft, and a second synchronizing wheel is installed on the rotating shaft in the front wheel mechanism on the right side in the two front wheel mechanisms; the first synchronizing wheel is connected with the second synchronizing wheel through a first synchronizing belt; the two swing plates are connected through a connecting plate, and two ends of the connecting plate are respectively connected with the corresponding swing plates through rotating fit; the diameters of the first synchronous wheel and the second synchronous wheel are the same.

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