CN108852671B

CN108852671B - Fast steering device for wheelchair

Info

Publication number: CN108852671B
Application number: CN201810371884.XA
Authority: CN
Inventors: 摩根斯·罗森
Original assignee: Mbl Xiamen Co ltd
Current assignee: Mbl Xiamen Co ltd
Priority date: 2018-04-24
Filing date: 2018-04-24
Publication date: 2023-02-14
Anticipated expiration: 2038-04-24
Also published as: CN108852671A

Abstract

The invention discloses a wheelchair fast steering device, which comprises a shifting fork mechanism, a driving shaft, a driven shaft, a shaft sleeve, a gear box and a bevel gear set, wherein the shifting fork mechanism is arranged on the driving shaft; the driving shaft and the driven shaft can respectively and rotatably extend into the gear box from two ends, and the inner end of the driving shaft is opposite to the inner end of the driven shaft; the shaft sleeve is movably sleeved at the inner end of the driving shaft in a tooth groove matching mode, the shaft sleeve and the driven shaft can form two states of clamping and separation in a tooth groove matching mode, the middle part of a shifting fork on the shifting fork mechanism is hinged on the gear box, one end of the shifting fork abuts against the shaft sleeve, and the shaft sleeve can be shifted to move back and forth along the driving shaft. The end parts of the middle driving shaft and the middle driven shaft are both provided with tooth shapes, the middle connected shaft sleeve is also partially provided with the tooth shapes matched with the main shaft, the main shaft of the wheelchair is driven by the bevel gear group to rotate mutually, the handle pulls the steel wire to drive the shifting fork to move, the rotating directions of the driving wheel and the driven wheel are changed, and the operation is simple; the wheel of the wheelchair can be quickly disassembled, and the whole structure is compact.

Description

Fast steering device for wheelchair

Technical Field

The invention relates to a wheelchair, in particular to a quick steering device of the wheelchair.

Background

The wheelchair is an important tool for rehabilitation, and the wheelchair is not only a walking tool for physically disabled people and mobility-handicapped people, but also is more important for enabling the people to do physical exercises and participate in social activities by means of the wheelchair. The common wheelchair generally comprises a wheelchair frame, wheels, a brake device and a seat back. The user drives the wheelchair by rotating the hand rim fixed on the wheel. When the wheelchair turns, the rotation directions of the two wheels need to be changed, and therefore, a corresponding mechanism needs to be designed.

Disclosure of Invention

The invention aims to provide a fast steering device of a wheelchair, which is simple to operate and convenient to install.

In order to achieve the purpose, the technical solution of the invention is as follows:

the invention relates to a wheelchair fast steering device, which comprises a shifting fork mechanism, a driving shaft, a driven shaft, a shaft sleeve, a gear box and a bevel gear set, wherein the shifting fork mechanism is arranged on the driving shaft; the driving shaft and the driven shaft can respectively and rotatably extend into the gear box from two ends, and the inner end of the driving shaft is opposite to the inner end of the driven shaft; the shaft sleeve is movably sleeved at the inner end of the driving shaft in a tooth groove matching manner, and the shaft sleeve and the driven shaft can form two states of clamping and separation in a tooth groove matching manner; the driving shaft is connected with or separated from the driven shaft through a shaft sleeve and a bevel gear set; the middle part of a shifting fork on the shifting fork mechanism is hinged on the gear box, one end of the shifting fork is abutted against the shaft sleeve, and the shaft sleeve can be shifted to move back and forth along the driving shaft.

The bevel gear set comprises a driving bevel gear, a transition bevel gear and a driven bevel gear; the driving bevel gear, the transition bevel gear and the driven bevel gear are all installed in the gear box, the driving shaft sleeve, the driving bevel gear, the transition bevel gear and the driven bevel gear are meshed in sequence, and the driven bevel gear is fixedly sleeved on the driven shaft.

The shifting fork mechanism comprises a shifting fork, a shifting fork spring, an operating handle, a spring bracket, a steel wire rope and a sleeve; the middle part of the shifting fork is hinged on the gear box, one end of the shifting fork abuts against the shaft sleeve, the other end of the shifting fork is connected with the steel wire rope, the steel wire rope is movably sleeved in the sleeve, the sleeve is fixed on the spring support, the spring support is fixed on the gear box, and two ends of a spring of the shifting fork respectively abut against the shifting fork and the spring support.

After the scheme is adopted, the end parts of the middle driving shaft and the middle driven shaft are both provided with the tooth shapes, the middle connected shaft sleeve is also partially provided with the tooth shapes matched with the main shaft, the main shaft of the wheelchair is driven by the bevel gear group to rotate mutually, the handle pulls the steel wire to drive the shifting fork to move, the rotating directions of the driving wheel and the driven wheel are changed, and the operation is simple; the wheel of wheelchair can be dismantled fast, and overall structure is compact, adopts the lighter aluminum product of weight, and the weight of whole portion wheelchair car of increase that can not be too much, simple to operate can provide very big facility for one-hand wheelchair user's life, can be used to one-hand drive wheelchair, realizes quick turn in the little space.

The invention is further described with reference to the following figures and specific examples.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a schematic illustration of the separation of the drive and driven shafts of the present invention;

FIG. 3 is a schematic view of the communication between the driving and driven shafts of the present invention;

figure 4 is a schematic view of the present invention mounted on a wheelchair.

Detailed Description

As shown in figures 1 and 2, the invention relates to a quick steering device of a wheelchair, which comprises a shifting fork mechanism 1, a driving shaft 2, a driven shaft 3, a shaft sleeve 4, a gear box 5 and a bevel gear set 6.

The driving shaft 2 and the driven shaft 3 can respectively and rotatably extend into the gear box 5 from two ends, and the inner end of the driving shaft 2 is opposite to the inner end of the driven shaft 3; the shaft sleeve 4 is movably sleeved at the inner end of the driving shaft 2 in a tooth groove matching mode, and the shaft sleeve 4 and the driven shaft 3 can form two states of clamping and separation in the tooth groove matching mode.

The bevel gear set 6 comprises a driving bevel gear 61, a transition bevel gear 62 and a driven bevel gear 63; the driving bevel gear 61, the transition bevel gear 62 and the driven bevel gear 63 are all arranged in the gear box 5, the driving shaft sleeve, the driving bevel gear 61, the transition bevel gear 62 and the driven bevel gear 63 are meshed in sequence, and the driven bevel gear 63 is fixedly sleeved on the driven shaft 3.

The driving shaft 2 is connected with or separated from the driven shaft 3 through a shaft sleeve 4 and a bevel gear set 6.

The shifting fork mechanism 1 comprises a shifting fork 11, a shifting fork spring 12, an operating handle 13, a spring support 14, a steel wire rope (not shown in the figure) and a sleeve 15. The middle of the shifting fork 11 is hinged to the gear box 5, one end of the shifting fork 11 abuts against the shaft sleeve 4, the shaft sleeve 4 can be shifted to move back and forth along the driving shaft 2, the other end of the shifting fork 11 is connected with the steel wire rope, the steel wire rope is movably sleeved in the sleeve 15, the sleeve 15 is fixed on the spring support 14, the spring support 14 is fixed on the gear box 5, and two ends of the shifting fork spring 12 abut against the shifting fork 11 and the spring support 14 respectively.

As shown in FIG. 4, the present invention 10 is mounted on a wheelchair 20.

The working principle of the invention is as follows:

1. as shown in fig. 3 and fig. 1, when the operating handle 13 is pressed down, the wire rope is driven to compress the shift fork spring 12, the shift fork 11 is shifted, the driving shaft 2 and the driven shaft 3 are switched from a separated state to a communicated state, and at this time, the ring pushing driving wheel 201 and the driven wheel 202 are turned to the same direction.

2. As shown in fig. 2 and 1, when the operating handle 13 is released, the shift fork 11 is moved horizontally to the left by the elastic force of the shift fork spring 12, so that the driving shaft 2 is engaged with the sleeve 4, the sleeve 4 is separated from the driven shaft 3, the driving shaft 2 is separated from the driven shaft 3, the force on the driving wheel pushing ring 10 is transmitted to the driven wheel 202 through the movement of the bevel gear set 6, and at this time, the pushing ring driving wheel 201 and the driven wheel 202 are rotated in opposite directions.

The above description is only a preferred embodiment of the present invention, and therefore should not be taken as limiting the scope of the invention, which is defined by the appended claims and their equivalents and modifications within the scope of the description.

Claims

1. The utility model provides a wheelchair turns to device fast which characterized in that: comprises a shifting fork mechanism, a driving shaft, a driven shaft, a shaft sleeve, a gear box and a bevel gear set; the driving shaft and the driven shaft can respectively and rotatably extend into the gear box from two ends, and the inner end of the driving shaft is opposite to the inner end of the driven shaft; the shaft sleeve is movably sleeved at the inner end of the driving shaft in a tooth groove matching mode, and the shaft sleeve and the driven shaft can form two states of clamping and separation in the tooth groove matching mode; the driving shaft is connected with or separated from the driven shaft through a shaft sleeve and a bevel gear set; the middle part of a shifting fork on the shifting fork mechanism is hinged on the gear box, one end of the shifting fork is abutted against the shaft sleeve, and the shifting fork can shift the shaft sleeve to move back and forth along the driving shaft.

2. The wheelchair fast steering apparatus of claim 1, wherein: the bevel gear set comprises a driving bevel gear, a transition bevel gear and a driven bevel gear; the driving bevel gear, the transition bevel gear and the driven bevel gear are all installed in the gear box, the driving shaft sleeve, the driving bevel gear, the transition bevel gear and the driven bevel gear are meshed in sequence, and the driven bevel gear is fixedly sleeved on the driven shaft.

3. The wheelchair fast steering apparatus of claim 1, wherein: the shifting fork mechanism comprises a shifting fork, a shifting fork spring, an operating handle, a spring bracket, a steel wire rope and a sleeve; the middle part of the shifting fork is hinged on the gear box, one end of the shifting fork abuts against the shaft sleeve, the other end of the shifting fork is connected with the steel wire rope, the steel wire rope is movably sleeved in the sleeve, the sleeve is fixed on the spring support, the spring support is fixed on the gear box, and two ends of a spring of the shifting fork respectively abut against the shifting fork and the spring support.