Driving shaft for wheelchair

Abstract

The utility model discloses a driving shaft for a wheelchair, the driving shaft is a driving shaft assembly, and the driving shaft assembly comprises a connecting shaft, a wheel mounting shaft and a middle limiting connecting piece; the number of the wheel installation shafts and the number of the middle limiting connecting pieces are both two, the two wheel installation shafts are installed at the two ends of the connecting shaft through the middle limiting connecting pieces respectively, and the wheel installation shafts are rotatably installed at one ends of the middle limiting connecting pieces. The wheel chair has the advantages that the stability and strength of the wheel chairs with two driving powers can be improved through cooperation of the connecting shafts, the wheel mounting shafts and the middle limiting connecting pieces, the service life of the wheel chairs is greatly prolonged, the structure is compact and reasonable, all parts are detachably connected, interchangeability is good, and the service life of the wheel chairs is prolonged. In addition, the chain wheel is rotatably mounted on the chain wheel mounting part through a bearing, and the chain wheel is limited to be mounted on the inner side of the chain wheel limiting part so that the stability of the chain wheel can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wheelchair part technical field, concretely relates to a driving shaft for wheelchair. BACKGROUND

[0002] The main function of a wheelchair is to meet the needs of the disabled and the people with difficulty in walking. These people may have limited walking ability due to illness, accidents or other reasons, and the wheelchair provides a convenient way of moving, allowing them to move freely indoors and outdoors and carry out daily life activities. However, the current drive is driven by two drive motors, and each drive motor is directly connected to the wheel. The overall two wheels are not connected together, and the overall wheelchair has low strength and stability. SUMMARY

[0003] The purpose of the utility model is to solve the above problems and provide a driving shaft for a wheelchair, as described below.

[0004] To achieve the above purpose, the utility model provides the following technical scheme:

[0005] The utility model provides a kind of driving shaft for wheelchair, the driving shaft is driving shaft assembly, the driving shaft assembly includes connecting shaft, wheel installation shaft and intermediate limit connecting piece;The wheel installation shaft and intermediate limit connecting piece are two, two the wheel installation shaft is respectively installed in the two ends of the connecting shaft by intermediate limit connecting piece, and the wheel installation shaft rotatably is installed in one end of intermediate limit connecting piece.

[0006] As a priority, the intermediate limit connecting piece is provided with a mounting hole, and one end of the connecting shaft is rotatably installed in the intermediate limit connecting piece.

[0007] As a priority, the intermediate limit connecting piece is further provided with an external thread, a sprocket mounting portion and a sprocket limiting portion;The sprocket is rotatably installed on the sprocket mounting portion by a bearing, and the sprocket is limited to be installed inside the sprocket limiting portion.

[0008] As a priority, a fixing hole is fixedly arranged inside the sprocket;The sprocket is fixed on the wheel by a bolt passing through the fixing hole.

[0009] As a priority, the connecting shaft is provided with a support mounting portion and a connecting internal thread;The external thread of the intermediate limit connecting piece and the internal thread of the connecting shaft are matched.

[0010] As a priority, the support mounting portion of the connecting shaft is provided with a rotation stopping surface.

[0011] As a priority, the rotation stopping surface is matched with the rotation stopping hole of the support assembly.

[0012] As a priority, the rotation-stopping surface is provided on one side of the support mounting portion.

[0013] As a priority, the rotation-stopping surface is provided on both sides of the support mounting portion.

[0014] The utility model discloses a wheel chair of two driving power, which comprises a driving shaft assembly, a wheel mounting shaft and an intermediate limiting connecting piece. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to make the technical scheme of the embodiments of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description.

[0016] Fig. 1 It is the three-dimensional structure schematic diagram of the utility model;

[0017] Fig. 2 It is the sectional view of the utility model;

[0018] Fig. 3 It is the state diagram when the utility model is used.

[0019] The following is the explanation of the signs:

[0020] 1, driving shaft assembly; 101, connecting shaft; 1011, support mounting portion; 1012, connecting internal thread; 102, wheel mounting shaft; 103, intermediate limiting connecting piece; 1031, external thread; 1032, sprocket mounting portion; 1033, sprocket limiting portion; 1034, mounting hole; 2, wheel. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model clearer, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0022] Referring to Figs. 1-3 The utility model provides a drive shaft for wheelchair, drive shaft is drive shaft assembly 1, drive shaft assembly 1 includes connecting shaft 101, wheel installation shaft 102 and intermediate limit connecting piece 103, wheel installation shaft 102 and intermediate limit connecting piece 103 are two, two wheel installation shaft 102 is installed respectively in the both ends of connecting shaft 101 through intermediate limit connecting piece 103, and wheel installation shaft 102 rotatably installed in one end of intermediate limit connecting piece 103.

[0023] In the embodiment, the intermediate limit connecting piece 103 is provided with a mounting hole 1034, and one end of the connecting shaft 101 is rotatably installed in the intermediate limit connecting piece 103.

[0024] In the embodiment, the intermediate limit connecting piece 103 is further provided with an external thread 1031, a sprocket mounting portion 1032 and a sprocket limiting portion 1033; a sprocket is rotatably installed on the sprocket mounting portion 1032 through a bearing, and the sprocket is limitedly installed inside the sprocket limiting portion 1033.

[0025] In the embodiment, a fixing hole is fixedly arranged inside the sprocket; and the sprocket is fixed on the wheel 2 through a bolt penetrating through the fixing hole.

[0026] In the embodiment, the connecting shaft 101 is provided with a support mounting portion 1011 and a connecting internal thread 1012; the external thread 1031 of the intermediate limit connecting piece 103 and the internal thread of the connecting shaft 101 are matched.

[0027] In the embodiment, the support mounting portion 1011 of the connecting shaft 101 is provided with a rotation stopping surface.

[0028] In the embodiment, the rotation stopping surface is matched with a rotation stopping hole of a support assembly.

[0029] In the embodiment, the rotation stopping surface is arranged on one side of the support mounting portion 1011, and can prevent the support assembly from rotating relative to the connecting shaft 101.

[0030] In the embodiment, the rotation-stopping surfaces are arranged on both sides of the support mounting portion 1011; compared with the structure in which the rotation-stopping surfaces are arranged on one side of the support mounting portion 1011, the rotation-stopping area is increased, and the rotation-stopping force is increased.

[0031] The above structure is applied as follows:

[0032] According to the installation sequence, the sprocket is installed on the intermediate limiting connecting piece 103 through the bearing, then the wheel mounting shaft 102 on which the wheel 2 is installed is installed on the intermediate limiting connecting piece 103, then the driving chain is installed, and finally the two sprockets are installed on the two ends of the connecting shaft 101, the sprocket is fixed on the wheel 2 through the bolt penetrating the fixing hole, when starting, the motor is controlled through the controller, the motor drives the driving wheel, and then drives the sprocket through the driving chain, since the sprocket is fixed on the wheel 2, the wheel 2 is driven to rotate and walk, since the sprocket is rotatably installed on the sprocket mounting portion 1032 through the bearing, the sprocket is limited to be installed inside the sprocket limiting portion 1033, and the intermediate limiting connecting piece 103 is provided with the mounting hole 1034, one end of the connecting shaft 101 is rotatably installed inside the intermediate limiting connecting piece 103, the wheel 2 can rotate relative to the connecting shaft 101, the wheel 2 can not be separated from the driving shaft, and the strength and stability of the whole wheelchair can be increased.

[0033] The beneficial effects are that the cooperation of the connecting shaft 101, the wheel mounting shaft 102 and the intermediate limiting connecting piece 103 can increase the stability and strength of the wheelchair with two driving powers, greatly improve the service life of the wheelchair, the structure is compact and reasonable, the parts are all detachably connected and have good interchangeability, the sprocket is rotatably installed on the sprocket mounting portion 1032 through the bearing, the sprocket is limited to be installed inside the sprocket limiting portion 1033, the stability of the sprocket can be increased, the fixing hole is fixedly arranged inside the sprocket, the sprocket is fixed on the wheel 2 through the bolt penetrating the fixing hole, the synchronous rotation of the wheel 2 and the sprocket can be ensured, the firmness and detachability of the connection are increased, and the maintenance and installation operations are convenient and fast.

[0034] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A drive shaft for a wheelchair, characterized in that: The drive shaft is a drive shaft assembly, which includes a connecting shaft, a wheel mounting shaft, and an intermediate limiting connector. There are two wheel mounting shafts and two intermediate limiting connectors. The two wheel mounting shafts are respectively mounted on both ends of the connecting shaft through the intermediate limiting connector, and the wheel mounting shafts are rotatably mounted on one end of the intermediate limiting connector.

2. The drive shaft for a wheelchair according to claim 1, characterized in that: The intermediate limiting connector is provided with a mounting hole, and one end of the connecting shaft is rotatably mounted in the intermediate limiting connector.

3. A drive shaft for a wheelchair according to claim 2, characterized in that: The intermediate limiting connector is also provided with an external thread, a sprocket mounting part and a sprocket limiting part; the sprocket is rotatably mounted on the sprocket mounting part through a bearing, and the sprocket is restricted to be mounted inside the sprocket limiting part.

4. A drive shaft for a wheelchair according to claim 3, characterized in that: The sprocket has a fixing hole on its inner side; the sprocket is fixed to the wheel by bolts passing through the fixing hole.

5. A drive shaft for a wheelchair according to claim 4, characterized in that: The connecting shaft is provided with a support mounting part and a connecting internal thread; the external thread of the intermediate limiting connector and the internal thread of the connecting shaft are engaged.

6. A drive shaft for a wheelchair according to claim 5, characterized in that: The mounting portion of the connecting shaft's support member is provided with an anti-rotation surface.

7. A drive shaft for a wheelchair according to claim 6, characterized in that: The anti-rotation surface mates with the anti-rotation hole of the support component.

8. A drive shaft for a wheelchair according to claim 6, characterized in that: The anti-rotation surface is located on one side of the support mounting portion.

9. A drive shaft for a wheelchair according to claim 6, characterized in that: The anti-rotation surfaces are located on both sides of the mounting portion of the support member.

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