Electric wheelchair with ladder climbing function

Abstract

The utility model relates to the technical field of wheelchairs, in particular to an electric wheelchair with a ladder climbing function, which comprises a wheelchair frame, a transmission shaft rotatably mounted on the wheelchair frame, rear wheels fixedly mounted at two ends of the transmission shaft, and a power component fixedly mounted on the wheelchair frame. Two symmetrically-distributed positioning rods are fixedly installed on the wheelchair frame, the ends of the two positioning rods are jointly and rotationally connected with a transmission rod, gears are fixedly installed at the two ends of the transmission rod, one side of each gear is meshed with an outer gear ring fixedly connected with the corresponding rear wheel, a driving wheel is fixedly installed on the transmission rod, and a swing plate is rotationally connected to the transmission rod. A driven wheel is rotationally installed on the swing plate, a crawler belt is installed outside the driving wheel and the driven wheel, an electric telescopic rod is further rotationally installed on the wheelchair frame, and the output end of the electric telescopic rod is rotationally connected with the swing plate.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair technical field, concretely relates to an electric wheelchair with a ladder climbing function. BACKGROUND

[0002] The wheelchair is a chair with wheels that can help replace walking, and is an important mobile tool for the home rehabilitation, turnover transportation, medical treatment and outdoor activities of the wounded, sick and disabled. The wheelchair not only meets the needs of walking for the physically disabled and the disabled, but also makes it convenient for family members to move and care for the sick, so that the sick can exercise their bodies and participate in social activities with the help of the wheelchair. The ordinary wheelchair is generally composed of a wheelchair frame, front and rear wheels, left and right knee protectors and foot pedals, left and right armrests, a handle brake device, a seat, a backrest and the like. It is also divided into manual and electric types. The manual type needs the user to rotate the rear wheels with his hands to move forward and backward, or someone needs to push it to move.

[0003] Although the electric wheelchair in the prior art can move on slopes and flat roads, it cannot climb stairs without the assistance of others, and the patient will not be able to climb the stairs to the upper floor.

[0004] The above information disclosed in the background section is only used to enhance the understanding of the background of the present disclosure, and therefore it can include information that does not constitute prior art known to those of ordinary skill in the art. UTILITY MODEL CONTENT

[0005] The utility model aims at designing an electric wheelchair that can climb stairs without the assistance of others, in order to solve the above-mentioned deficiencies in the art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme: an electric wheelchair with a ladder climbing function, comprising a wheelchair frame, a transmission shaft rotatably installed on the wheelchair frame, rear wheels fixedly installed at both ends of the transmission shaft, and a power assembly fixedly installed on the wheelchair frame, the power assembly drives the transmission shaft to reverse, two symmetrical positioning rods are fixedly installed on the wheelchair frame, a transmission rod is rotatably connected at the ends of the two positioning rods, gears are fixedly installed at both ends of the transmission rod, an outer gear ring fixedly connected with the rear wheels is meshed with one side of the gears, a driving wheel is fixedly installed on the transmission rod, a swing plate is rotatably connected to the transmission rod, a driven wheel is rotatably installed on the swing plate, a track is installed outside the driving wheel and the driven wheel, an electric telescopic rod is rotatably installed on the wheelchair frame, and the output end of the electric telescopic rod is rotatably connected with the swing plate.

[0007] Preferably, a plurality of support wheels rotatably connected with the swing plate are arranged between the driving wheel and the driven wheel.

[0008] Preferably, the swing plate is rotatably connected in the middle of the transmission rod, and the driving wheel, the driven wheel and the support wheel are symmetrically installed on both sides of the swing plate.

[0009] Preferably, the bottom surface of the track is higher than the ground contacted by the rear wheels when the driving wheel and the driven wheel are in the same horizontal plane.

[0010] Preferably, the track is in contact with the ground when the output shaft of the electric telescopic rod is at the longest, and the rear wheels are not in contact with the ground; the rear wheels are in contact with the ground when the electric telescopic rod is at the shortest, and the track is not in contact with the ground.

[0011] Preferably, the bottom end of the driving wheel is higher than the bottom end of the rear wheel.

[0012] Preferably, the outer ring of the track has anti-skid lines.

[0013] In the above technical solution, the technical effects and advantages of the utility model are provided:

[0014] 1. The wheelchair is started by the electric telescopic rod, the track is in contact with the ground, the rear wheels are lifted off the ground, the rear wheels are driven to rotate when idling, the track is used to drive the wheelchair to climb stairs, and the technical problem that the user cannot climb stairs to reach the upper floor without assistance in the prior art is solved.

[0015] 2. When the electric telescopic rod is started to be elongated, the output shaft of the electric telescopic rod can be continuously elongated after the rear wheels are lifted off the ground, so that the user can adjust the angle of the wheelchair backward according to the slope of the stairs, so that the user's field of vision can be parallel to the horizontal plane when climbing stairs, instead of upward.

[0016] 3. After the wheelchair faces the stairs and the output shaft of the electric telescopic rod is elongated, the rear wheels are driven to idle forward, and the wheelchair can also descend the stairs. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments described in the utility model, and other drawings can also be obtained by those skilled in the art according to these drawings.

[0018] Figure 1 It is a use state schematic diagram of the utility model;

[0019] Figure 2 It is a perspective view of the utility model;

[0020] Figure 3 It is a partial perspective view of the utility model;

[0021] Figure 4 It is a schematic diagram of the swing plate and the driving wheel connection of the utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Wheelchair frame; 2. Drive shaft; 3. Rear wheel; 4. Power unit; 5. Positioning rod; 6. Transmission rod; 7. Gear; 8. External gear ring; 9. Drive wheel; 10. Swing plate; 11. Driven wheel; 12. Track; 13. Electric telescopic rod; 14. Support wheel. Detailed Implementation

[0024] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0026] Example:

[0027] like Figures 1-4 As shown, the wheelchair includes a wheelchair frame 1, a drive shaft 2 rotatably mounted on the wheelchair frame 1, rear wheels 3 fixedly mounted at both ends of the drive shaft 2, and a power assembly 4 fixedly mounted on the wheelchair frame 1. The power assembly 4 drives the drive shaft 2 to rotate forward and backward. Two symmetrically distributed positioning rods 5 are fixedly mounted on the wheelchair frame 1. The ends of the two positioning rods 5 are rotatably connected to a drive rod 6. Gears 7 are fixedly mounted at both ends of the drive rod 6. One side of the gear 7 meshes with an external gear ring 8 fixedly connected to the rear wheel 3. Two symmetrically distributed drive wheels 9 are fixedly mounted on the drive rod 6. The bottom end of wheel 9 is higher than the bottom end of rear wheel 3. A swing plate 10 is rotatably connected to the middle of the transmission rod 6. Two symmetrically distributed driven wheels 11 are rotatably mounted on the swing plate 10. A track 12 is mounted on the outside of the driving wheel 9 and the driven wheels 11. The outer ring of the track 12 has anti-slip texture. There are multiple support wheels 14 between the driving wheel 9 and the driven wheels 11 that are rotatably connected to the swing plate 10. The support wheels 14 are also in contact with the inner ring of the track 12. An electric telescopic rod 13 is also rotatably mounted on the wheelchair frame 1. The output end of the electric telescopic rod 13 is rotatably connected to the swing plate 10.

[0028] When the user needs to go up the stairs, the back of the user is towards the stairs, and then the electric telescopic rod 13 is started, the output shaft of the electric telescopic rod 13 is elongated, thereby driving the swing plate 10 to rotate around the transmission rod 6, the swing plate 10 drives the driven wheel 11, the supporting wheel 14 and the track 12 to rotate around the transmission rod 6, when the track 12 contacts the ground, the whole wheelchair is gradually turned over backwards, when the rear wheel 3 is separated from the ground, the user can continue to drive the output shaft of the electric telescopic rod 13 to elongate until the electric telescopic rod 13 is the longest, which can be selected according to the slope of the stairs, the greater the slope, the longer the electric telescopic rod 13 should be stretched, then the user operates the power assembly 4 to drive the rear wheel 3 to rotate backwards, the rear wheel 3 rotates in the air, but the rear wheel 3 drives the outer gear ring 8 to rotate, the outer gear ring 8 drives the gear 7 to rotate, the gear 7 drives the transmission rod 6 to rotate, the transmission rod 6 drives the driving wheel 9 to rotate, the driving wheel 9 drives the track 12 to rotate, so that the track 12 contacts the stairs, then the track 12 is lifted by the friction force generated by the contact, and gradually presses the outer circle of the track 12 against the corner of the stairs, at this time, since the driving wheel 9 is higher than the driven wheel 11, the wheelchair is actually turned forward, so that the user faces forward when automatically climbing the stairs, instead of facing the sky.

[0029] When going down the stairs, the wheelchair faces the stairs, and the operation method is the same as above.

[0030] The above merely describes some exemplary embodiments of the present application in a descriptive manner, without doubt, for ordinary skilled in the art, the described embodiments can be modified in various ways without departing from the spirit and scope of the present application. Therefore, the above drawings and descriptions are illustrative in nature, and should not be understood as limiting the scope of protection of the present application.

[0031] Various modifications to these embodiments will be apparent to those of ordinary skill in the art, and the general principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Accordingly, the present application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0032] Finally: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric wheelchair with a climbing ladder function, comprising a wheelchair frame (1), a transmission shaft (2) rotatably installed on the wheelchair frame (1), rear wheels (3) fixedly installed at both ends of the transmission shaft (2), and a power assembly (4) fixedly installed on the wheelchair frame (1), the power assembly (4) driving the transmission shaft (2) to rotate forward and backward, characterized in that: The wheelchair frame (1) is fixedly provided with two symmetrical positioning rods (5), the two ends of the positioning rods (5) are rotatably connected with a transmission rod (6), the two ends of the transmission rod (6) are fixedly provided with gears (7), one side of the gears (7) is engaged with an external gear ring (8) fixedly connected with the rear wheel (3), the transmission rod (6) is fixedly provided with a driving wheel (9), the transmission rod (6) is rotatably connected with a swing plate (10), the swing plate (10) is rotatably provided with a driven wheel (11), the driving wheel (9) and the driven wheel (11) are externally provided with a track (12), the wheelchair frame (1) is further rotatably provided with an electric telescopic rod (13), and the output end of the electric telescopic rod (13) is rotatably connected with the swing plate (10).

2. The electric wheelchair with the stair climbing function according to claim 1, characterized in that: A plurality of support wheels (14) rotatably connected with the swing plate (10) are arranged between the driving wheel (9) and the driven wheel (11).

3. The electric wheelchair with the stair climbing function according to claim 2, characterized in that: The swing plate (10) is rotatably connected in the middle of the transmission rod (6), and the driving wheel (9), the driven wheel (11) and the support wheel (14) are symmetrically arranged on both sides of the swing plate (10).

4. The electric wheelchair with the stair climbing function according to claim 1, characterized in that: When the driving wheel (9) and the driven wheel (11) are in the same horizontal plane, the bottom surface of the track (12) is higher than the ground contacted by the rear wheel (3).

5. The electric wheelchair with the stair climbing function according to claim 1, characterized in that: When the output shaft of the electric telescopic rod (13) is the longest, the track (12) is in contact with the ground, and the rear wheel (3) is not in contact with the ground; when the electric telescopic rod (13) is shortened to the shortest, the rear wheel (3) is in contact with the ground, and the track (12) is not in contact with the ground.

6. The electric wheelchair with the stair climbing function according to claim 1, characterized in that: The bottom end of the driving wheel (9) is higher than the bottom end of the rear wheel (3).

7. The electric wheelchair with the stair climbing function according to claim 1, characterized in that: The outer ring of the track (12) has anti-skid lines.

Images