Wheelchair capable of climbing stairs

Abstract

The utility model discloses a wheelchair capable of climbing stairs, which comprises a frame, a front wheel component arranged at the front part of the bottom of the frame and a rear wheel component arranged at the rear part of the bottom of the frame, the frame comprises a front bracket, a rear bracket and a push rod, and the wheelchair capable of climbing stairs further comprises a stair climbing mechanism arranged behind the push rod; the stair climbing mechanism comprises a connecting frame which is connected to the frame and located behind the push rod, a crawler belt assembly which can rotate around a first axis below and is connected to the rear portion of the connecting frame, and an adjusting assembly which is arranged between the connecting frame and the crawler belt assembly and used for adjusting the backward rotation angle of the crawler belt assembly relative to the connecting frame. The adjusting assembly is further used for fixing the crawler belt assembly to the connecting frame, the adjusting assembly is located above the first axis, and the first axis is parallel to the left-right direction. The wheelchair capable of climbing the stairs can be used on stairs with different gradients, the application range is relatively large, and the use experience of a user can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wheelchair equipment, in particular to a stair-climbing wheelchair. Background Art

[0002] Stair-climbing wheelchairs are generally used to transfer people up and down stairs in high-rise buildings. In the existing technology, the tracks of stair-climbing wheelchairs are rotated backward at a fixed angle, making them difficult to adapt to stairs of different slopes. The scope of application is narrow and the user experience is relatively poor. Utility Model Content

[0003] The purpose of the utility model is to provide a stair climbing wheelchair that can be used on stairs of different slopes, has a relatively wide range of applicability, and can improve the user experience.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A stair-climbing wheelchair comprises a frame, a front wheel assembly provided at the front bottom of the frame, and a rear wheel assembly provided at the rear bottom of the frame, wherein the frame comprises a front bracket, a rear bracket and a push rod, and the stair-climbing wheelchair further comprises a stair-climbing mechanism provided behind the push rod;

[0006] The stair climbing mechanism includes a connecting frame connected to the vehicle frame and located behind the push rod, a track assembly connected to the rear of the connecting frame and rotatable around a first axis below, and an adjustment assembly provided between the connecting frame and the track assembly and used to adjust the backward rotation angle of the track assembly relative to the connecting frame. The adjustment assembly is also used to fix the track assembly on the connecting frame. The adjustment assembly is located above the first axis, and the first axis is parallel to the left and right directions.

[0007] Preferably, the track assembly includes a pair of mounting frames spaced apart in the left-right direction, crawlers corresponding to each other and drivingly wrapped around the outer periphery of the mounting frames, and a connecting shaft connected between the pair of mounting frames.

[0008] More preferably, a pair of the mounting frames are respectively provided with a sliding groove on the inner side, and at least two gear slots connected to the rear of the corresponding sliding groove, the adjustment component includes a rotating handle connected to the connecting frame at one end which can be rotated around the second axis, and a first limiting shaft connected to the other end of the rotating handle which can be rotated around the third axis, the first limiting shaft is parallel to the third axis, the first limiting shaft is located between the pair of mounting frames, and the two ends of the first limiting shaft are used to extend into the two sliding grooves one by one.

[0009] Further preferably, the adjustment assembly also includes a second limiting shaft provided at the other end of the rotating handle and located between a pair of the mounting frames, a connecting rod with one end rotating around the axis of the second limiting shaft and connected to the second limiting shaft, the other end of the connecting rod is connected to the first limiting shaft, the two ends of the second limiting shaft are used to extend into the two sliding grooves one by one, and the axis of the second limiting shaft is the third axis.

[0010] More preferably, the second axis and the third axis are parallel to each other and respectively parallel to the first axis.

[0011] More preferably, the sliding groove is perpendicular to the first axis.

[0012] More preferably, at least two of the shift slots are spaced apart from each other along the slot direction of the sliding slot.

[0013] Preferably, the connecting frame is detachably mounted on the vehicle frame.

[0014] More preferably, a first connecting member is provided at the upper end of the connecting frame, and the first connecting member is connected to the upper end of the push rod through a pin arranged along the left and right directions; a second connecting member is provided at the lower end of the connecting frame, and a slot is provided on the second connecting member with an opening facing downward and used to press the rear wheel axle downward.

[0015] Preferably, the stair-climbing wheelchair further comprises a backrest cushion, a seat cushion, armrests and footrests arranged on the frame.

[0016] Due to the application of the above technical solution, the present invention has the following advantages compared with the existing technology: the stair-climbing wheelchair of the present invention provides an adjustment component between the connecting frame and the track assembly. The adjustment component is used to adjust the angle of the track assembly relative to the connecting frame, and can fix the track assembly in the open position, so that the stair-climbing wheelchair can be suitable for stairs of different slopes, and the scope of application is relatively large, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Attachment Figure 1 The structure of the stair climbing wheelchair according to the specific embodiment of the utility model is shown as follows Figure 1 ;

[0018] Attachment Figure 2 The structure of the stair climbing wheelchair according to the specific embodiment of the utility model is shown as follows Figure 2 ;

[0019] Attachment Figure 3 1 is a schematic side view of the structure of a stair-climbing wheelchair according to a specific embodiment of the present utility model;

[0020] Attachment Figure 4 The figure is a schematic top view of the stair climbing wheelchair according to a specific embodiment of the utility model.

[0021] Including: 1. Frame; 11. Front bracket; 12. Rear bracket; 13. Push rod;

[0022] 2. Front wheel assembly; 3. Rear wheel assembly;

[0023] 4. Stair climbing mechanism;

[0024] 41. Connecting frame; 411. First connecting member; 412. Latch; 413. Second connecting member; 4131. Slot;

[0025] 42. Track assembly; 421. Mounting frame; 422. Track; 423. Connecting shaft; 424. Sliding slot; 425. Gear slot;

[0026] 43. Adjustment assembly; 431. Rotation handle; 432. First limiting axis; 433. Second limiting axis; 434. Connecting rod;

[0027] 5. Backrest cushion; 6. Seat cushion; 7. Armrest; 8. Foot pedal; 9. Handbrake; 10. Motor. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0029] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0030] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inside", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0032] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0033] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0035] See also Figure 1-4 As shown, this embodiment provides a stair-climbing wheelchair, comprising a frame 1, a front wheel assembly 2 disposed at the front bottom portion of the frame 1, and a rear wheel assembly 3 disposed at the rear bottom portion of the frame 1. The frame 1 comprises a front bracket 11, a rear bracket 12, and a push rod 13. The front wheel assembly 2 is disposed at the bottom of the front bracket 11, and the rear wheel assembly 3 is disposed at the bottom of the rear bracket 12. The rear wheel assembly 3 further comprises a rear wheel axle.

[0036] The stair-climbing wheelchair further includes a stair-climbing mechanism 4 located behind the push rod 13. The stair-climbing mechanism 4 includes a connecting frame 41 connected to the vehicle frame 1 and located behind the push rod 13; a track 422 assembly 42 connected to the rear of the connecting frame 41 and rotatable about a first axis passing through the lower portion of the connecting frame 41; and an adjustment assembly 43 located between the connecting frame 41 and the track 422 assembly 42 and used to adjust the rearward rotation angle of the track 422 assembly 42 relative to the connecting frame 41. The adjustment assembly 43 is further used to secure the track 422 assembly 42 to the connecting frame 41 so that the track 422 assembly 42 has multiple rearward rotation angles relative to the connecting frame 41 about the first axis. The first axis is parallel to the left-right direction and located at the bottom of the connecting frame 41. The adjustment mechanism is located near the middle of the connecting frame 41, that is, above the first axis.

[0037] See also Figure 2 As shown, the crawler assembly 42 includes a pair of mounting frames 421 spaced apart in the left-right direction, crawlers 422 corresponding to each other and drivingly wrapped around the outer periphery of the mounting frames 421, and a connecting shaft 423 connected between the pair of mounting frames 421. A motor 10 is also provided between the pair of mounting frames 421 to drive the pair of crawlers 422 to synchronously drive on the outer sides of the corresponding mounting frames 421 to achieve stair climbing operation.

[0038] Among them, a pair of mounting frames 421 are respectively provided with sliding grooves 424 and at least two gear slots 425 connected to the rear of the corresponding sliding grooves 424. In this embodiment, each sliding groove 424 is connected to three gear slots 425, and the three pairs of gear slots 425 on both sides are aligned in the up and down directions.

[0039] The above-mentioned adjustment component 43 includes a rotating handle 431 at one end of which can be rotated around the second axis and connected to the connecting frame 41, and a first limiting shaft 432 at the other end of the rotating handle 431 which can be rotated around the third axis. The first limiting shaft 432 is parallel to the third axis. The first limiting shaft 432 is located between a pair of mounting frames 421, and the two ends of the first limiting shaft 432 are used to extend into the two sliding grooves 424 one by one.

[0040] Through this setting, when it is necessary to adjust the angle of the track assembly 42 to rotate backward relative to the connecting frame 41, pull the rotating handle 431 upward to rotate it upward around the second axis, so that the two ends of the first limit shaft 432 enter the sliding groove 424 from the lower gear groove 425 and slide upward, and enter the upper gear groove 425 to increase the angle of the track assembly 42 to rotate backward relative to the connecting frame 41.

[0041] In this embodiment, the adjustment assembly 43 also includes a second limiting shaft 433 provided at the other end of the rotating handle 431 and located between a pair of mounting frames 421, a pair of connecting rods 434 respectively connected to the end of the second limiting shaft 433 by rotating around the axis of the second limiting shaft 433 at one end, the other ends of the pair of connecting rods 434 are respectively connected to the two ends of the first limiting shaft 432, and the two ends of the second limiting shaft 433 are used to extend into the two sliding grooves 424 one by one, and the axis of the second limiting shaft 433 is the third axis, which can further improve the stability of the track assembly 42 rotating backward relative to the connecting frame 41.

[0042] In this embodiment, the second axis and the third axis are parallel to each other and respectively parallel to the first axis; the sliding groove 424 is perpendicular to the first axis; and at least two shift grooves 425 are arranged at intervals along the groove direction of the sliding groove 424 .

[0043] The connecting frame 41 is detachably mounted on the frame 1. With this arrangement, when there is no need to climb stairs, the stair climbing mechanism 4 can be removed to make the wheelchair more convenient to use.

[0044] See also Figure 3 As shown, the upper end of the connecting frame 41 is provided with a first connecting member 411, which is connected to the upper end of the push rod 13 via a latch 412 arranged in the left-right direction. The lower end of the connecting frame 41 is provided with a second connecting member 413, which has a slot 4131 with a downward opening for pressing the rear wheel axle downward. When disassembly is required, the latch 412 is first pulled out, and then the connecting frame 41 and track assembly 42 are pulled upward as a whole.

[0045] The stair-climbing wheelchair further comprises a backrest cushion 5, a seat cushion 6, armrests 7, a footrest 8 and a handbrake 9 arranged on the frame 1, which are all conventional structural arrangements and will not be described in detail here.

[0046] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.

Claims

1. A stair-climbing wheelchair comprising a frame, a front wheel assembly provided at the front bottom of the frame, and a rear wheel assembly provided at the rear bottom of the frame, wherein the frame comprises a front bracket, a rear bracket, and a push rod, and is characterized in that: The stair-climbing wheelchair further includes a stair-climbing mechanism arranged behind the push rod; The stair climbing mechanism includes a connecting frame connected to the vehicle frame and located behind the push rod, a crawler assembly connected to the rear of the connecting frame and rotatable around a first axis below, and an adjustment assembly provided between the connecting frame and the crawler assembly and used to adjust the backward rotation angle of the crawler assembly relative to the connecting frame, the adjustment assembly is also used to fix the crawler assembly on the connecting frame, the adjustment assembly is located above the first axis, and the first axis is parallel to the left and right directions; The crawler track assembly includes a pair of mounting frames spaced apart in the left-right direction, crawlers corresponding to each other and drivingly wrapped around the outer periphery of the mounting frames, and a connecting shaft connected between the pair of mounting frames; A pair of mounting brackets are respectively provided with a sliding groove on their inner sides, and at least two gear slots connected to the rear of the corresponding sliding grooves. The adjustment assembly includes a rotating handle, one end of which is rotatable about a second axis and connected to the connecting bracket, and a first limiting shaft, the other end of which is rotatable about a third axis and connected to the rotating handle. The first limiting shaft is parallel to the third axis, is located between the pair of mounting brackets, and both ends of the first limiting shaft are used to extend into the two sliding grooves in a one-to-one correspondence. The adjustment assembly also includes a second limiting shaft provided at the other end of the rotating handle and located between a pair of the mounting frames, a connecting rod with one end rotating around the axis of the second limiting shaft and connected to the second limiting shaft, the other end of the connecting rod is connected to the first limiting shaft, the two ends of the second limiting shaft are used to extend into the two sliding grooves one by one, and the axis of the second limiting shaft is the third axis.

2. The stair-climbing wheelchair according to claim 1, characterized in that: The second axis and the third axis are parallel to each other and are respectively parallel to the first axis.

3. The stair-climbing wheelchair according to claim 1, characterized in that: The sliding groove is perpendicular to the first axis.

4. The stair-climbing wheelchair according to claim 1, characterized in that: At least two of the shift slots are spaced apart along the slot direction of the sliding slot.

5. The stair-climbing wheelchair according to claim 1, characterized in that: The connecting frame is detachably arranged on the vehicle frame.

6. The stair-climbing wheelchair according to claim 5, characterized in that: A first connecting piece is provided at the upper end of the connecting frame, and the first connecting piece is connected to the upper end of the push rod through a pin arranged in the left and right directions; a second connecting piece is provided at the lower end of the connecting frame, and a slot with an opening facing downward and used to press the rear wheel axle downward is provided on the second connecting piece.

7. The stair-climbing wheelchair according to claim 1, characterized in that: The stair-climbing wheelchair further comprises a backrest cushion, a seat cushion, armrests and footrests which are arranged on the frame.

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