Stepping electric wheelchair walking base

Abstract

The utility model discloses a kind of electric wheelchair walking bases that can pass step, it is car frame, rear wheel mechanism connected in the rear part of car frame, front wheel mechanism connected in the front part of car frame, drive mechanism is installed on car frame and is transmission connection with rear wheel mechanism, rotatably connected in the auxiliary support mechanism and support adjusting mechanism of front end of car frame.The utility model is by setting an adjustable auxiliary support mechanism in the front end of wheelchair base, by the contact of auxiliary support mechanism and step to prop up the front wheel of wheelchair, auxiliary front wheel reaches step top surface, the utility model is when using, without user control auxiliary support mechanism, further provide convenience for user.

Description

Technical Field

[0001] This utility model belongs to the field of electric wheelchair technology, specifically, it relates to a walking base for an electric wheelchair that can traverse steps. Background Technology

[0002] Electric wheelchairs are upgraded versions of traditional manual wheelchairs by incorporating high-performance power drive devices, intelligent control devices, batteries, and other components. Equipped with a manually operated intelligent controller, these new-generation intelligent wheelchairs can perform multiple functions such as forward movement, backward movement, turning, standing, and lying down. They are high-tech products that combine modern precision mechanics, intelligent numerical control, and engineering mechanics.

[0003] In existing technology, the diameter of the front wheels of wheelchairs is often smaller than that of the rear wheels, making it easy for the front wheels to be blocked when there is a step in front. In practice, a caregiver needs to lift the front wheels to allow them to step over first. However, when there is no caregiver, it is difficult for a person in a wheelchair to step over the step alone.

[0004] Chinese patent CN114432057A discloses a device to assist wheelchairs in navigating steps. It mainly involves installing a motor-controlled raising and lowering mechanism at the rear of the wheelchair to assist in navigating steps. This auxiliary structure is bulky and requires operation each time the wheelchair is navigating steps, making it inconvenient to use. Utility Model Content

[0005] To address the problems in related technologies, this invention proposes an electric wheelchair base capable of traversing steps. By installing an auxiliary support structure on the base, the wheelchair is assisted in traversing steps and thresholds.

[0006] Therefore, the specific technical solution adopted by the present invention is as follows:

[0007] A type of electric wheelchair base that can traverse stairs, its package

[0008] Frame,

[0009] The rear wheel mechanism is connected to the rear of the frame;

[0010] The front wheel mechanism is connected to the front of the frame;

[0011] The drive mechanism is mounted on the frame and is connected to the rear wheel mechanism via transmission.

[0012] An auxiliary support mechanism is rotatably connected to the front end of the frame and rotates between a first position where the auxiliary support mechanism can contact the step and a second position where the auxiliary support mechanism cannot contact the step. When the auxiliary support mechanism contacts the step, it causes the front wheel mechanism to levitate.

[0013] A support adjustment mechanism is rotatably connected to one or more of the frame and auxiliary support mechanisms, and can selectively hold the auxiliary support mechanism in a first position or a second position.

[0014] The auxiliary support mechanism includes

[0015] The pivot shaft is rotatably mounted on the connecting bracket at the front end of the vehicle frame.

[0016] The upper end of the support tube is fixedly connected to the rotating shaft.

[0017] The floor is supported and fixedly connected to the lower end of the support tube.

[0018] When the supporting floor contacts the step, the pivot and connecting frame rotate.

[0019] The connecting frame includes

[0020] Mounting tube, which is fixedly connected to the front end of the frame;

[0021] Two mounting plates are provided and are fixedly installed on the mounting tube at intervals.

[0022] The two ends of the rotating shaft are connected to two mounting plates. One mounting plate is provided with a first limiting groove, and a first limiting post is fixed on the support tube. The first limiting post cooperates with the first limiting groove. The other mounting plate is provided with a second limiting post.

[0023] The aforementioned support adjustment mechanism includes:

[0024] A limiting plate is rotatably connected to a rotating shaft. The limiting plate is provided with a second limiting groove. The second limiting post and the second limiting groove include a first end and a second end.

[0025] The control unit connects to the limit plate and drives the limit plate to rotate;

[0026] A gas spring, with its fixed end connected to the lower part of the support tube and its telescopic end connected to the limiting plate;

[0027] When the second limiting post is located at the first end of the second limiting groove, the auxiliary support mechanism can contact the step. When the second limiting post is located at the second end of the second limiting groove, the auxiliary support mechanism can rotate and fold, and cannot contact the step.

[0028] The limiting plate and the control unit are an integral structure.

[0029] The first limiting groove is an open structure located at the bottom of the mounting plate, and the first limiting post is fixed to the lower surface of the mounting tube.

[0030] Compared with the prior art, this application has at least the following obvious advantages and effects:

[0031] This invention features an adjustable auxiliary support mechanism at the front end of the wheelchair base. The auxiliary support mechanism contacts the step, thus supporting the front wheels of the wheelchair and helping them reach the top surface of the step. This invention eliminates the need for user operation of the auxiliary support mechanism, providing greater convenience for users.

[0032] 2. When not in use, the auxiliary support mechanism in this utility model can be retracted through the support adjustment mechanism. The overall structure is simple and the retraction operation is convenient. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural view of the present invention;

[0034] Figure 2 This is a side view of the present invention;

[0035] Figure 3 This is a structural diagram of the auxiliary support mechanism and the support adjustment mechanism in this utility model;

[0036] Figure 4 This is another structural diagram of the auxiliary support mechanism and the support adjustment mechanism in this utility model;

[0037] Figure 5 This is a schematic diagram showing the auxiliary support mechanism in the second position in this utility model.

[0038] Figure 6 This is a schematic diagram of the limiting plate in this utility model;

[0039] List of components in this application:

[0040] 1. Frame; 2. Rear wheel mechanism; 3. Front wheel mechanism; 4. Drive mechanism; 5. Auxiliary support mechanism; 6. Support adjustment mechanism; 7. Connecting frame; 21. Rear wheel; 22. Auxiliary wheel; 31. Front wheel; 32. Front wheel frame; 51. Axle; 52. Support tube; 53. Support floor; 54. First column; 61. Limiting plate; 62. Control unit; 63. Gas spring; 64. Second limiting groove; 71. Mounting tube; 72. Mounting plate; 73. First limiting groove; 74. Second limiting column; 641. First end; 642. Second end. Detailed Implementation

[0041] Specific embodiments of this application have been described in conjunction with the accompanying drawings and the following description to teach those skilled in the art how to make and use this application. For the purpose of teaching the principles of the application, the following conventional aspects have been simplified or omitted. Those skilled in the art should understand that variations derived from these embodiments fall within the scope of this application. Those skilled in the art should understand that the following features can be combined in various ways to form multiple variations of this application. Terms such as “upper,” “lower,” “left,” “right,” “middle,” and “one” used in this application are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this utility model. Therefore, this application is not limited to the specific embodiments described below, but only to the claims and their equivalents.

[0042] like Figure 1 and Figure 2 As shown, this embodiment relates to an electric wheelchair base capable of traversing steps, comprising a frame 1, a rear wheel mechanism 2, a front wheel mechanism 3, a drive mechanism 4, an auxiliary support mechanism 5, and a support adjustment mechanism 6. The front wheel mechanism 3 and the rear wheel mechanism 2 are respectively connected to the front and rear ends of the frame 1. The front wheel mechanism 3 includes two front wheels 31 and a front wheel frame 32 connecting the front wheels 31 to the frame 1. The rear wheel mechanism 2 includes two rear wheels 21 and two auxiliary wheels 22, with the auxiliary wheels 22 positioned between the two rear wheels 21. The drive mechanism 4 is mounted on the frame 1 and is connected to the rear wheels 21 via a transmission. In this embodiment, the drive mechanism 4 adopts a motor drive structure.

[0043] like Figure 3 Only Figure 5 As shown, the auxiliary support mechanism 5 is rotatably connected to the front end of the frame 1, located between the two front wheels 31, and rotates between a first position where the auxiliary support mechanism 5 can contact the step and a second position where the auxiliary support mechanism 5 cannot contact the step. When the auxiliary support mechanism 5 contacts the step, it suspends the two front wheels 21. The support adjustment mechanism 6 is mainly used to limit the auxiliary support mechanism 5. In this application, the support adjustment mechanism 6 is rotatably connected to one or more of the frame 1 and the auxiliary support mechanism 5, and can selectively hold the auxiliary support mechanism 5 in the first position (e.g., Figure 3 (as shown) or the second position (such as) Figure 5 (As shown).

[0044] Specifically, the auxiliary support mechanism 5 includes a rotating shaft 51, a support tube 52, and a support plate 53. The rotating shaft 51 is rotatably mounted on the connecting frame 7 at the front end of the frame 1. The upper end of the support tube 52 is fixedly connected to the rotating shaft 51, and the lower end of the support tube 52 is fixedly connected to the support plate 53. The support plate 53 has a certain arc upward in the front direction to facilitate contact with the step. During use, after the support plate 53 contacts the step, the rear wheel 21 continues to move forward under the drive of the drive mechanism 4. Because the support plate 53 abuts against the step, the front wheel 31 is lifted upward.

[0045] In addition, the aforementioned connecting frame 7 includes a mounting tube 71 and a mounting plate 72. The mounting tube 71 is fixedly connected to the front end of the frame 1. Two mounting plates 72 are provided and fixedly mounted on the mounting tube 71 at intervals. One mounting plate 72 is provided with a first limiting groove 73, and a first limiting post 54 is fixed on the support tube 52. The first limiting post 54 cooperates with the first limiting groove 73. The other mounting plate 72 is provided with a second limiting post 74. The main function of the first limiting post 54 and the first limiting groove 73 is to limit the angle of rotation when the support plate 53 contacts the step, since the support tube 52 and the frame 1 will rotate relative to each other.

[0046] In the embodiments of this application, the support adjustment mechanism 6 includes a limiting plate 61, a control unit 62, and a gas spring 63. The limiting plate 61 is rotatably connected to the rotating shaft 51. The limiting plate 61 is provided with a second limiting groove 64. The second limiting post 74 cooperates with the second limiting groove 64. The second limiting groove 64 includes a first end 641 and a second end 642 (e.g., ...). Figure 6 (As shown); the control unit 62 and the limiting plate 61 are an integral structure. The limiting plate is rotated by the operation of the control unit 62 by the operator; the fixed end of the gas spring 63 is connected to the lower part of the support tube 52, and the telescopic end is connected to the limiting plate 61; when the second limiting post 74 is located at the first end 641 of the second limiting groove 64, the auxiliary support mechanism 5 can contact the step; when the second limiting post 74 is located at the second end 642 of the second limiting groove 64, the auxiliary support mechanism 5 rotates and folds and cannot contact the step.

[0047] In this application, the gas spring 63 has two functions. On the one hand, when the auxiliary support mechanism 5 contacts the step, the auxiliary support mechanism 5 and the frame 1 rotate, and the distance between the bottom of the support tube 52 and the limiting plate 61 decreases, that is, the distance between the telescopic end and the fixed end of the gas spring 63 decreases, and the gas spring 63 is compressed. Under the action of the gas spring 63, the auxiliary support mechanism 5 can be reset. On the other hand, when the auxiliary support mechanism 5 is retracted, the limiting plate 61 is rotated to make the second limiting post 74 located at the second end 642 of the second limiting groove 64. At this time, the gas spring 63 can keep the auxiliary support mechanism 5 in the second position.

[0048] The first limiting groove 73 is an open structure and is located at the bottom of the mounting plate 72. The first limiting post 54 is fixed on the lower surface of the support tube 52. The first limiting groove 73 adopts an open structure mainly to facilitate installation with the first limiting post, and also to make grooving easier during processing.

[0049] As those skilled in the art will readily conceive, any modifications, equivalent substitutions, improvements, etc., made using the concept and principles of this application should be included within the scope of the claims of this application.

Claims

1. A platform for an electric wheelchair capable of traversing steps, characterized in that, It includes Frame, The rear wheel mechanism is connected to the rear of the frame; The front wheel mechanism is connected to the front of the frame; The drive mechanism is mounted on the frame and is connected to the rear wheel mechanism via transmission. An auxiliary support mechanism is rotatably connected to the front end of the frame and rotates between a first position where the auxiliary support mechanism can contact the step and a second position where the auxiliary support mechanism cannot contact the step. When the auxiliary support mechanism contacts the step, it causes the front wheel mechanism to levitate. A support adjustment mechanism is rotatably connected to one or more of the frame and auxiliary support mechanisms, and can selectively hold the auxiliary support mechanism in a first position or a second position.

2. The electric wheelchair base capable of traversing steps according to claim 1, characterized in that, The auxiliary support mechanism includes The pivot shaft is rotatably mounted on the connecting bracket at the front end of the vehicle frame. The upper end of the support tube is fixedly connected to the rotating shaft. The floor is supported and fixedly connected to the lower end of the support tube. When the supporting floor contacts the step, the pivot and connecting frame rotate.

3. The electric wheelchair base capable of traversing steps according to claim 2, characterized in that, The connecting frame includes Mounting tube, which is fixedly connected to the front end of the frame; Two mounting plates are provided and are fixedly installed on the mounting tube at intervals. The two ends of the rotating shaft are connected to two mounting plates. One mounting plate is provided with a first limiting groove, and a first limiting post is fixed on the support tube. The first limiting post cooperates with the first limiting groove. The other mounting plate is provided with a second limiting post.

4. The electric wheelchair base capable of traversing steps according to claim 3, characterized in that, The aforementioned support adjustment mechanism includes: A limiting plate is rotatably connected to a rotating shaft. The limiting plate is provided with a second limiting groove. The second limiting post cooperates with the second limiting groove. The second limiting groove includes a first end and a second end. The control unit connects to the limit plate and drives the limit plate to rotate; A gas spring, with its fixed end connected to the lower part of the support tube and its telescopic end connected to the limiting plate; When the second limiting post is located at the first end of the second limiting groove, the auxiliary support mechanism can contact the step. When the second limiting post is located at the second end of the second limiting groove, the auxiliary support mechanism can rotate and fold, and cannot contact the step.

5. The electric wheelchair base capable of traversing steps according to claim 4, characterized in that, The limiting plate and the control unit are an integral structure.

6. The electric wheelchair base capable of traversing steps according to claim 3, characterized in that, The first limiting groove is an open structure located at the bottom of the mounting plate, and the first limiting post is fixed to the lower surface of the mounting tube.

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