Liftable wheelchair

Abstract

The utility model relates to the technical field of wheelchairs, and discloses a liftable wheelchair which comprises a bottom plate, a first electric push rod is fixedly arranged at the upper end of the bottom plate, a base is fixedly arranged at the upper end of the first electric push rod, two fixing rods are arranged at the upper end of the bottom plate, and lead screws are rotationally arranged in the two fixing rods. The peripheries of the two lead screws are both sleeved with handrails in a threaded mode, a fourth gear is rotationally arranged on the upper side of the rear end of the bottom plate, a second synchronous wheel is fixedly arranged at the upper end of the fourth gear, and a first synchronous wheel and a third gear are fixedly arranged on the peripheries of the lower ends of the two lead screws correspondingly. A second electric push rod is fixedly arranged on the upper side of the rear end of the bottom plate. When the device is used, the first electric push rod is started to raise the height of the base so that the base can be flush with a bed, then the lead screw is rotated to drive the handrail to move downwards, and a patient is turned over towards one side of a sickbed, so that the patient can be conveniently transferred to the sickbed.

Description

Technical Field

[0001] This utility model relates to the field of wheelchair technology, and in particular to a height-adjustable wheelchair. Background Technology

[0002] A wheelchair is a chair equipped with wheels that can help replace walking. It is an important mobility tool for the injured, sick, and disabled to use for home rehabilitation, transportation, medical treatment, and outdoor activities. Wheelchairs not only meet the mobility needs of people with limb disabilities and those with limited mobility, but more importantly, they facilitate the movement and care of family members, and enable patients to exercise and participate in social activities with the help of wheelchairs.

[0003] In existing technologies, transferring a patient from a wheelchair to a bed typically involves lifting the patient and then transferring them to the bed. However, this method is not only inefficient and provides a poor experience for the patient, but it also places a significant physical burden on the caregiver. Therefore, those skilled in the art have provided a height-adjustable wheelchair to address the problems mentioned in the background section. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a height-adjustable wheelchair. When in use, the height of the base can be adjusted. When the height of the base is level with the bed, the armrests on the side closest to the bed can be lowered, making it easier to move the patient to the bed and facilitating patient transfer.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a height-adjustable wheelchair, including a base plate, an electric push rod fixedly installed at the upper end of the base plate, a base fixedly installed at the upper end of the electric push rod, two fixing rods installed at the upper end of the base plate, a lead screw rotatably installed inside each of the two fixing rods, and armrests threaded around the two lead screws.

[0006] A No. 4 gear is rotatably mounted on the upper rear end of the base plate. A No. 2 synchronous pulley is fixedly mounted on the upper end of the No. 4 gear. A No. 1 synchronous pulley and a No. 3 gear are fixedly mounted around the lower ends of the two lead screws, respectively. A No. 2 electric push rod is fixedly mounted on the upper rear end of the base plate. A slider is fixedly mounted on the output end of the No. 2 electric push rod. A motor is fixedly mounted on the upper end of the slider. A No. 2 gear is fixedly mounted on the output end of the motor. A synchronous belt connects the No. 1 synchronous pulley and the No. 2 synchronous pulley.

[0007] Furthermore, a rear wheel is rotatably mounted on the upper end of the base plate, and front wheels are rotatably mounted on both sides of the front end of the base plate.

[0008] Furthermore, two telescopic rods are fixedly installed on the upper front side of the base plate, and the upper ends of the two telescopic rods are fixedly installed on the lower end of the base.

[0009] Furthermore, the two armrests are disposed inside the base, and a backrest is slidably disposed between the two fixed rods.

[0010] Furthermore, a first gear is rotatably provided at the lower end of the base, and two fixing brackets are fixedly provided at the lower end of the base.

[0011] Furthermore, two first racks are slidably arranged inside the two fixed frames, and two second racks are slidably arranged inside the two fixed frames, both of which mesh with a first gear.

[0012] Furthermore, the height of the two fixed rods is higher than that of the backrest, and the slider is slidably disposed at the upper end of the base plate.

[0013] Furthermore, handles are fixedly installed on the upper ends of the two fixed rods on the side away from the base, and two support rods are fixedly installed on both sides of the upper end of the base plate.

[0014] This utility model has the following beneficial effects:

[0015] 1. This utility model proposes a height-adjustable wheelchair. When in use, activating the first electric push rod moves the base upwards. As the base moves upwards, the two first racks move the armrests upwards. When the base height is comparable to the bed height, the motor drives the second gear to rotate. Then, activating the second electric push rod moves the slider, which in turn moves the motor and the second gear. The second gear then drives the third or fourth gear to rotate, which in turn rotates either of the two lead screws, lowering the armrest closest to the bed. This allows the patient to be transferred from the side of the base to the bed, making patient transfer easier and more convenient, reducing physical exertion, and improving the patient's experience.

[0016] 2. The present invention proposes a height-adjustable wheelchair. When the base is raised, the two first racks can drive the two armrests to move upward. When the armrests are lowered, only the second rack needs to be pulled to drive the first gear to rotate. The first gear drives the two first racks to move towards each other and disengage from the lower end of the two armrests, so that the lead screw can drive the armrests to descend, making it convenient to transfer the patient from one side of the base to the bed. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front end of this utility model;

[0018] Figure 2 This is a cross-sectional view of the present invention;

[0019] Figure 3 For the present utility model Figure 2 Enlarged view of point A;

[0020] Figure 4 This is a schematic diagram of the rear isometric projection of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged diagram of point B.

[0022] Legend:

[0023] 1. Backrest; 2. Armrest; 3. Base; 4. Telescopic rod; 5. Base plate; 6. Front wheel; 7. Handle; 8. Lead screw; 9. Fixed rod; 10. Rear wheel; 11. Support rod; 12. Electric push rod No. 1; 13. Gear No. 1; 14. Rack No. 1; 15. Rack No. 2; 16. Fixed frame; 17. Electric push rod No. 2; 18. Synchronous belt; 19. Synchronous pulley No. 1; 20. Synchronous pulley No. 2; 21. Motor; 22. Slider; 23. Gear No. 2; 24. Gear No. 3; 25. Gear No. 4. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5This utility model provides an embodiment of a height-adjustable wheelchair, comprising a base plate 5, with a first electric push rod 12 fixedly mounted on the upper end of the base plate 5, a base 3 fixedly mounted on the upper end of the first electric push rod 12, two fixing rods 9 mounted on the upper end of the base plate 5, each fixing rod 9 having a lead screw 8 rotatably mounted inside, and armrests 2 threaded around each lead screw 8, a fourth gear 25 rotatably mounted on the upper rear end of the base plate 5, a second synchronous pulley 20 fixedly mounted on the upper end of the fourth gear 25, and the two lead screws 8... A first synchronous pulley 19 and a third gear 24 are fixedly installed around the lower end of the base plate 5. A second electric push rod 17 is fixedly installed on the upper rear end of the base plate 5. A slider 22 is fixedly installed at the output end of the second electric push rod 17. A motor 21 is fixedly installed at the upper end of the slider 22. A second gear 23 is fixedly installed at the output end of the motor 21. A synchronous belt 18 connects the first synchronous pulley 19 and the second synchronous pulley 20. A rear wheel 10 is rotatably installed at the rear of the upper end of the base plate 5. Front wheels 6 are rotatably installed on both sides of the front end of the base plate 5.

[0026] Specifically, starting the first electric pusher moves the base 3 upward, which helps adjust the height of the base 3 and facilitates the transfer of the patient from the base 3 to the bed. Rotating the lead screw 8 lowers the handrail 2, which allows the handrail 2 on the side closest to the bed to be lowered after the base 3 is level with the bed. This helps tilt one side of the base 3 and transfer the patient to the bed, improving the efficiency of patient transfer and reducing the physical exertion of caregivers. Rotating the fourth gear 25 rotates the second synchronous pulley 20, which in turn rotates the first synchronous pulley 19 via the synchronous belt 18. This helps rotate the lead screw 8, making it easier to lower one side of the handrail 2. Rotating the third gear 24 helps rotate the other side of the lead screw 8. Starting the motor 21 rotates the second gear 23, which in turn moves the second electric push rod 17, causing the slider 22 and motor 21 to move. This allows the second gear 23 to engage with the third gear 24 and the fourth gear 25, respectively, which in turn rotates the two lead screws 8. This allows the handrail 2 to be lowered in different directions depending on the actual situation.

[0027] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4Two telescopic rods 4 are fixedly installed on the upper front side of the base plate 5. The upper ends of the two telescopic rods 4 are fixedly installed on the lower end of the base 3. Two handrails 2 are installed through the interior of the base 3. A backrest 1 is slidably installed between the two fixed rods 9. A first gear 13 is rotatably installed at the lower end of the base 3. Two fixed frames 16 are fixedly installed at the lower end of the base 3. Two first racks 14 are slidably installed inside the two fixed frames 16. A second rack 15 is slidably installed inside the two fixed frames 16. Both the first rack 14 and the second rack 15 are meshed with the first gear 13. The height of the two fixed rods 9 is higher than that of the backrest 1. A slider 22 is slidably installed on the upper end of the base plate 5. A handle 7 is fixedly installed on the upper end of the side of the two fixed rods 9 away from the base 3. Two support rods 11 are fixedly installed on both sides of the upper end of the base plate 5.

[0028] Specifically, by installing a telescopic rod 4 on the upper front side of the base plate 5, the base 3 becomes more stable when rising, preventing swaying and avoiding impact on the patient; by installing two handrails 2 inside the base 3, the handrails 2 become more stable when moving up and down, preventing swaying; pulling the second rack 15 drives the first gear 13 to rotate, and the first gear 13 drives the two first racks 14 to move, causing the two first racks 14 to disengage from the lower ends of the two handrails 2, which allows the handrails 2 to descend smoothly and avoid being blocked by the first racks 14; by installing a support frame on the upper end of the base plate 5, the handrails 2 are supported, keeping them stable at their lowest height and avoiding affecting the patient's user experience.

[0029] Working principle: When using this device, starting the first electric push rod 12 moves the base 3 upward, adjusting its height. Simultaneously, the two first racks 14 also move the armrest 2 upward. When the base 3 is level with the bed, the second rack 15 rotates the first gear 13, disengaging the two first racks 14 from the lower end of the armrest 2. The motor 21 then rotates the second gear 23, and the second electric push rod 17 moves the motor 21. When the second gear 23 and the third gear 24 mesh, they rotate the lead screw 8 on one side, lowering the armrest 2. When the second gear 23 meshes with the fourth gear 25, the fourth gear 25 rotates the second synchronous pulley 20. The second synchronous pulley 20, via the synchronous belt 18, rotates the first synchronous pulley 19, which in turn rotates the other lead screw 8, lowering the armrest 2 on the other side. Users can choose the appropriate method based on their needs.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A height-adjustable wheelchair, comprising a base plate (5), characterized in that: The upper end of the base plate (5) is fixedly provided with a first electric push rod (12), the upper end of the first electric push rod (12) is fixedly provided with a base (3), the upper end of the base plate (5) is provided with two fixed rods (9), the two fixed rods (9) are rotatably provided with screws (8), and the two screws (8) are threaded around the periphery of the two screws (8). A fourth gear (25) is rotatably mounted on the upper rear end of the base plate (5). A second synchronous pulley (20) is fixedly mounted on the upper end of the fourth gear (25). A first synchronous pulley (19) and a third gear (24) are fixedly mounted around the lower ends of the two lead screws (8). A second electric push rod (17) is fixedly mounted on the upper rear end of the base plate (5). A slider (22) is fixedly mounted on the output end of the second electric push rod (17). A motor (21) is fixedly mounted on the upper end of the slider (22). A second gear (23) is fixedly mounted on the output end of the motor (21). A synchronous belt (18) is connected between the first synchronous pulley (19) and the second synchronous pulley (20).

2. The height-adjustable wheelchair according to claim 1, characterized in that: The upper end of the base plate (5) is rotatably provided with a rear wheel (10), and the front sides of the base plate (5) are rotatably provided with front wheels (6).

3. The height-adjustable wheelchair according to claim 1, characterized in that: Two telescopic rods (4) are fixedly installed on the upper front side of the base plate (5), and the upper ends of the two telescopic rods (4) are fixedly installed on the lower end of the base (3).

4. The height-adjustable wheelchair according to claim 1, characterized in that: The two armrests (2) are disposed inside the base (3), and the backrest (1) is slidably disposed between the two fixed rods (9).

5. A height-adjustable wheelchair according to claim 1, characterized in that: A first gear (13) is rotatably provided at the lower end of the base (3), and two fixing brackets (16) are fixedly provided at the lower end of the base (3).

6. A height-adjustable wheelchair according to claim 5, characterized in that: Two first racks (14) are slidably arranged inside the two fixed frames (16), and two second racks (15) are slidably arranged inside the two fixed frames (16). Both the first racks (14) and the second racks (15) mesh with the first gear (13).

7. A height-adjustable wheelchair according to claim 1, characterized in that: The height of the two fixed rods (9) is higher than that of the backrest (1), and the slider (22) is slidably disposed on the upper end of the base plate (5).

8. A height-adjustable wheelchair according to claim 1, characterized in that: Handles (7) are fixedly installed on the upper end of the two fixed rods (9) away from the base (3), and two support rods (11) are fixedly installed on both sides of the upper end of the base plate (5).

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