Mechanical lifting wheelchair
阅读说明:本技术 机械式升降轮椅 (Mechanical lifting wheelchair ) 是由 李千 张学海 郭晓谭 于 2019-09-30 设计创作,主要内容包括:本发明适用于轮椅技术领域,提供一种机械式升降轮椅,包括轮椅本体,还包括设置于所述轮椅本体下端的升降结构,所述升降结构包括:底部支撑组件,设置于所述轮椅本体的底部,包括一对相对设置的支撑件;上支撑活动组件,包括一对活动支撑件,支撑所述轮椅本体的底部;齿轮齿条柱组件,包括两对相互啮合的第一齿轮和齿条柱,两个所述齿条柱的一端分别设置于所述一组支撑件上,另一端分别支撑所述一对活动支撑件,两个所述第一齿轮安装在一个转动轴上;升降控制组件,设置于两个所述第一齿轮的之间,控制所述两个第一齿轮的转动方向,以控制所述轮椅本体上升或下降。借此,本发明实现了轮椅能够上下调整高度。(The invention is suitable for the technical field of wheelchairs and provides a mechanical lifting wheelchair, which comprises a wheelchair body and a lifting structure arranged at the lower end of the wheelchair body, wherein the lifting structure comprises: the bottom support assembly is arranged at the bottom of the wheelchair body and comprises a pair of oppositely arranged support pieces; an upper support movable assembly including a pair of movable supports supporting the bottom of the wheelchair body; the gear rack column assembly comprises two pairs of first gears and rack columns which are meshed with each other, one ends of the two rack columns are respectively arranged on the group of supporting pieces, the other ends of the two rack columns respectively support the pair of movable supporting pieces, and the two first gears are arranged on a rotating shaft; and the lifting control assembly is arranged between the two first gears and controls the rotation directions of the two first gears so as to control the wheelchair body to ascend or descend. Therefore, the height of the wheelchair can be adjusted up and down.)
1. The utility model provides a mechanical type lift wheelchair, includes the wheelchair body, its characterized in that, still including set up in the elevation structure of wheelchair body lower extreme, elevation structure includes:
the bottom support assembly is arranged at the bottom of the wheelchair body and comprises a pair of oppositely arranged support pieces;
an upper support movable assembly including a pair of movable supports supporting the bottom of the wheelchair body;
the gear rack column assembly comprises two pairs of first gears and rack columns which are meshed with each other, one ends of the two rack columns are respectively arranged on the group of supporting pieces, the other ends of the two rack columns respectively support the pair of movable supporting pieces, and the two first gears are arranged on a rotating shaft;
and the lifting control assembly is arranged between the two first gears and controls the rotation directions of the two first gears so as to control the wheelchair body to ascend or descend.
2. The mechanically elevated wheelchair of claim 1 wherein the elevation control assembly comprises:
the clutch assembly is arranged between the two first gears; the clutch assembly comprises a clutch assembly frame body and handles connected to the left side and the right side of the frame body, and a shaft of the clutch assembly is arranged in the middle of the frame body;
the worm and gear assembly is arranged between the two first gears, comprises a worm and a worm wheel, and the worm wheel is arranged on the rotating shaft;
the bevel gear assembly comprises a pair of large bevel gears which are oppositely arranged and a small bevel gear which is arranged between the large bevel gears, wherein the small bevel gear is arranged at one end of a worm in the worm gear assembly through a first flat key;
the pedal ratchet wheel assembly comprises a ratchet wheel pin, a pedal ratchet wheel, a compression spring, a connecting spring and a pedal plate; the pedal ratchet wheel is fixed on the shaft of the clutch component through the ratchet wheel pin; the compression spring is sleeved on the shaft of the clutch assembly and is arranged between the pair of large bevel gears; the pedal is connected to the pedal ratchet wheel through a connecting rod; the two ends of the connecting spring are respectively connected with the pedal and the ratchet pin.
3. The mechanically liftable wheelchair of claim 2, wherein said support member has a first runner at a top thereof, said rack bar has a second runner at one end thereof, and a steel ball is provided at said second runner; one end of the rack column is fixed in the first sliding groove of the supporting piece; and the steel ball at the other end of the rack column is attached to the inner wall of the movable support piece.
4. The mechanically elevated wheelchair of claim 2 wherein the foot ratchet is locked to the shaft of the clutch assembly by a circlip.
5. The mechanically elevated wheelchair as claimed in claim 2 wherein the gear ratio of the worm gear to worm is 1:20, the pitch circle diameter of the rack and pinion in the rack and pinion column assembly is 30mm and the modulus is 2.
6. The mechanical lift wheelchair as claimed in claim 1, wherein said two first gears are mounted on said rotating shaft by a key and run synchronously with said worm gear.
7. The mechanical lifting wheelchair as claimed in claim 2, wherein when the upper supporting movable assembly is in a low position, the handle of the clutch assembly is pulled down, the large bevel gear and the small bevel gear which face to the right side of the mechanical lifting wheelchair are engaged, and the foot pedal drives the large bevel gear on the right side to rotate, so as to drive the worm gear and the worm to rotate, so that the first gear drives the movable supporting member to move above the rack post, and the wheelchair body is lifted smoothly.
8. The mechanical lifting wheelchair as claimed in claim 2, wherein when the upper supporting movable assembly is in the high position, the handle of the clutch assembly is pulled up, the pedal is stepped on by foot to drive the large bevel gear on the left side to rotate, the large bevel gear on the left side is meshed with the small bevel gear, the large bevel gear facing the left side of the mechanical lifting wheelchair is meshed with the small bevel gear, the pedal is stepped on by foot to drive the large bevel gear on the left side to rotate, the worm gear is driven to rotate, the first gear drives the movable supporting member to move towards the lower part of the rack column, and the wheelchair body descends stably.
9. The mechanically liftable wheelchair as claimed in claim 1, wherein said support member has a rectangular parallelepiped shape and rollers are provided below both ends of said support member; and two of the support members are arranged in parallel;
the pair of movable supporting pieces are respectively and vertically arranged on the supporting pieces.
10. The mechanical lifting wheelchair as claimed in claim 2, wherein the clutch assembly frame further comprises two transverse plates arranged in parallel up and down, and through holes matched with the worm are formed in the two transverse plates; and arcs matched with the worm wheel are further arranged on the left side and the right side of the clutch component frame body.
Technical Field
The invention belongs to the technical field of wheelchairs, and particularly relates to a mechanical lifting wheelchair.
Background
The wheelchair is an important tool for rehabilitation, not only is the walking tool for the disabled with limbs injured, but also is more important for the disabled to do physical exercise and participate in social activities by means of the wheelchair. Referring to fig. 1, the
In view of the above, the existing wheelchairs have obvious inconvenience and disadvantages in practical use, so that improvement is needed.
Disclosure of Invention
In view of the above-mentioned drawbacks, the present invention provides a mechanical lifting wheelchair to adjust the height of the wheelchair up and down.
In order to achieve the above object, the present invention provides a mechanical lifting wheelchair, including a wheelchair body, and further including a lifting structure provided at a lower end of the wheelchair body, the lifting structure including:
the bottom support assembly is arranged at the bottom of the wheelchair body and comprises a pair of oppositely arranged support pieces;
an upper support movable assembly including a pair of movable supports supporting the bottom of the wheelchair body;
the gear rack column assembly comprises two pairs of first gears and rack columns which are meshed with each other, one ends of the two rack columns are respectively arranged on the group of supporting pieces, the other ends of the two rack columns respectively support the pair of movable supporting pieces, and the two first gears are arranged on a rotating shaft;
and the lifting control assembly is arranged between the two first gears and controls the rotation directions of the two first gears so as to control the wheelchair body to ascend or descend.
According to the mechanical lifting wheelchair, the lifting control assembly comprises:
the clutch assembly is arranged between the two first gears; the clutch assembly comprises a clutch assembly frame body and handles connected to the left side and the right side of the frame body, and a shaft of the clutch assembly is arranged in the middle of the frame body;
the worm and gear assembly is arranged between the two first gears, comprises a worm and a worm wheel, and the worm wheel is arranged on the rotating shaft;
the bevel gear assembly comprises a pair of large bevel gears which are oppositely arranged and a small bevel gear which is arranged between the large bevel gears, wherein the small bevel gear is arranged at one end of a worm in the worm gear assembly through a first flat key;
the pedal ratchet wheel assembly comprises a ratchet wheel pin, a pedal ratchet wheel, a compression spring, a connecting spring and a pedal plate; the pedal ratchet wheel is fixed on the shaft of the clutch component through the ratchet wheel pin; the compression spring is sleeved on the shaft of the clutch assembly and is arranged between the pair of large bevel gears; the pedal is connected to the pedal ratchet wheel through a connecting rod; the two ends of the connecting spring are respectively connected with the pedal and the ratchet pin.
According to the mechanical lifting wheelchair, the top of the supporting piece is provided with a first sliding groove, one end of the rack column is provided with a second sliding groove, and the second sliding groove is provided with a steel ball; one end of the rack column is fixed in the first sliding groove of the supporting piece; and the steel ball at the other end of the rack column is attached to the inner wall of the movable support piece.
According to the mechanical lifting wheelchair, the pedal ratchet wheel is locked on the shaft of the clutch component through a clamp spring.
According to the mechanical lifting wheelchair, the transmission ratio of the worm gear to the worm is 1:20, the reference circle diameter of a gear rack in the gear rack column assembly is 30mm, and the modulus is 2.
According to the mechanical lifting wheelchair, the two first gears are fixedly arranged on the rotating shaft through one key respectively and synchronously rotate with the worm gear.
According to the mechanical lifting wheelchair, when the upper supporting movable assembly is in a low position, the handle of the clutch assembly is pulled down, the large bevel gear facing the right side of the mechanical lifting wheelchair is meshed with the small bevel gear, the pedal is stepped by feet to drive the large bevel gear on the right side to rotate, the worm and gear are driven to rotate, the first gear drives the movable supporting piece to move towards the upper part of the rack column, and the wheelchair body is stably lifted.
According to the mechanical lifting wheelchair, when the upper supporting movable assembly is in a high position, the handle of the clutch assembly is pulled upwards, the pedal plate is stepped by feet to drive the large bevel gear on the left side to rotate, the large bevel gear on the left side is meshed with the small bevel gear, the large bevel gear facing the left side of the mechanical lifting wheelchair is meshed with the small bevel gear, the pedal plate is stepped by feet to drive the large bevel gear on the left side to rotate, the worm and gear are driven to rotate, the first gear drives the movable support piece to move towards the lower part of the rack column, and the wheelchair body stably descends.
According to the mechanical lifting wheelchair, the supporting piece is cuboid, and rollers are arranged below two head ends of the supporting piece; and two of the support members are arranged in parallel;
the pair of movable supporting pieces are respectively and vertically arranged on the supporting pieces.
According to the mechanical lifting wheelchair, the clutch component frame body further comprises two transverse plates which are arranged in parallel up and down, and through holes matched with the worms are formed in the two transverse plates; and arcs matched with the worm wheel are further arranged on the left side and the right side of the clutch component frame body.
The mechanical lifting wheelchair is provided with the lifting structure at the lower end of the wheelchair body so as to adjust the lifting of the wheelchair. The bottom supporting component supports an upper supporting movable component, the upper supporting movable component is connected with a rack and pinion column component, the rack and pinion column component comprises two pairs of first gears and a rack column which are meshed with each other, and the two first gears are arranged on a rotating shaft; the lifting control assembly is arranged between the two first gears and controls the rotation directions of the two first gears so as to control the wheelchair body to ascend or descend. Therefore, the lifting of the mechanical lifting wheelchair is adjusted through the lifting control component. Finally, the problems of mutual moving from a wheelchair to a sofa, a bed, a toilet, a seat and the like of old people and disabled people with inconvenient actions, convenience and cool of incontinent people and the like are solved.
Drawings
FIG. 1 is a schematic view of a wheelchair configuration provided in the prior art;
FIG. 2 is a schematic structural diagram of a lifting structure of a mechanical lifting wheelchair according to an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a lifting structure of a mechanical lifting wheelchair according to an embodiment of the invention;
FIG. 4 is a schematic view of the upper support movable assembly in the lifting structure of the mechanical lift wheelchair according to the embodiment of the present invention;
FIG. 5 is a schematic structural view of a clutch assembly and a bevel gear assembly in a lifting structure of the mechanical lifting wheelchair according to the embodiment of the invention;
FIG. 6 is a front cross-sectional view of FIG. 5;
FIG. 7 is a side cross-sectional view of FIG. 5;
FIG. 8 is a schematic view of the assembly structure of the clutch assembly, the worm gear assembly and the bevel gear assembly in the lifting structure of the mechanical lifting wheelchair according to the embodiment of the present invention;
FIG. 9 is a side cross-sectional view of FIG. 8;
FIG. 10 is a schematic view of the assembly of the bottom support assembly, the upper support movable assembly and the rack and pinion assembly in the lifting structure of the mechanical lift wheelchair according to the embodiment of the present invention;
FIG. 11 is a schematic view of the assembly structure of the worm and gear assembly, the upper support movable assembly and the rack and pinion assembly in the lifting structure of the mechanical lifting wheelchair according to the embodiment of the present invention;
FIG. 12 is a schematic view of the assembly of the elevation control assembly in the elevation structure of the mechanically elevated wheelchair according to the embodiment of the present invention;
FIG. 13 is a schematic view of the assembly of the upper support movable assembly clutch assembly, the pedal ratchet assembly and the rack and pinion assembly in the lifting structure of the mechanical lifting wheelchair according to the embodiment of the present invention;
FIG. 14 is a schematic view of the assembly of the elevation control assembly in the elevation structure of the mechanically elevated wheelchair according to the embodiment of the present invention;
FIG. 15 is a schematic view of the assembly of the upper support movable assembly clutch assembly, the pedal ratchet assembly and the rack and pinion assembly in the lifting structure of the mechanical lifting wheelchair according to the embodiment of the present invention;
figure 16 is a footrest assembly of a drive mechanism for a mechanically elevated wheelchair in accordance with an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 2 to 16, in one embodiment of the present invention, there is provided a mechanical lifting wheelchair including a wheelchair body (not shown), and a
the
an upper support
the gear
and the
In this embodiment, referring to figure 1, the wheelchair body is the upper half of the wheelchair, including the seat, handles, etc. The
Referring to fig. 2-16, in one implementation of the present invention, the
a
a
A
A
In this embodiment, the lifting
Preferably, the
The
Referring to fig. 2 to 16, in one embodiment of the present invention, the top of the supporting
In an embodiment of the present invention, the mechanical lifting wheelchair comprises a wheelchair body, and further comprises a lifting
Referring to fig. 2 to 16, in one embodiment of the present invention, when the upper supporting
Alternatively, as shown in fig. 3, when the upper supporting
When the
Referring to fig. 2 and 16, in one embodiment of the present invention, the supporting
Therefore, the
In summary, the lifting structure of the mechanical lifting wheelchair is arranged at the lower end of the wheelchair body to adjust the lifting of the wheelchair. The bottom supporting component supports an upper supporting movable component, the upper supporting movable component is connected with a rack and pinion column component, the rack and pinion column component comprises two pairs of first gears and a rack column which are meshed with each other, and the two first gears are arranged on a rotating shaft; the lifting control assembly is arranged between the two first gears and controls the rotation directions of the two first gears so as to control the wheelchair body to ascend or descend. Therefore, the lifting of the mechanical lifting wheelchair is adjusted through the lifting control component. Finally, the problems of mutual moving from a wheelchair to a sofa, a bed, a toilet, a seat and the like of old people and disabled people with inconvenient actions, convenience and cool of incontinent people and the like are solved.
The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
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