CN110711085A - Knob formula lever drive arrangement and wheelchair of shifting suitable for wheelchair - Google Patents
Knob formula lever drive arrangement and wheelchair of shifting suitable for wheelchair Download PDFInfo
- Publication number
- CN110711085A CN110711085A CN201910995892.6A CN201910995892A CN110711085A CN 110711085 A CN110711085 A CN 110711085A CN 201910995892 A CN201910995892 A CN 201910995892A CN 110711085 A CN110711085 A CN 110711085A
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- Prior art keywords
- wheelchair
- wheel
- knob
- ratchet wheel
- knob type
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
- A61G5/021—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular propulsion mechanisms
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/02—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person
- A61G5/024—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs propelled by the patient or disabled person having particular operating means
- A61G5/025—Levers
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/1013—Wheelchairs having brakes engaging the wheel
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/1021—Wheelchairs having brakes engaging specific brake elements
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1005—Wheelchairs having brakes
- A61G5/1035—Wheelchairs having brakes manipulated by wheelchair user
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/10—Parts, details or accessories
- A61G5/1051—Arrangements for steering
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G2203/00—General characteristics of devices
- A61G2203/10—General characteristics of devices characterised by specific control means, e.g. for adjustment or steering
- A61G2203/14—Joysticks
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Mechanical Control Devices (AREA)
Abstract
A knob type gear shifting lever driving device suitable for a wheelchair and the wheelchair comprise a ratchet wheel driving mechanism used for driving the wheelchair and a knob type control rod matched with the ratchet wheel driving mechanism to realize switching between a front gear and a rear gear, wherein the knob type control rod is arranged on a wheel of the wheelchair through the ratchet wheel driving mechanism; the ratchet wheel driving mechanism comprises a base plate and a ratchet wheel fixedly connected with a wheel of the wheelchair, a fixed shaft which is collinear with the axis of the wheel of the wheelchair is arranged on the base plate through a fixed bearing, and the ratchet wheel is arranged on the fixed shaft through a rolling bearing. According to the invention, by arranging the knob control rod and the ratchet wheel driving mechanism and utilizing the lever principle, the horizontal pushing force of the arm is converted into the rotating force of the ratchet wheel through the lever, so that the driving is convenient, labor-saving and efficient; the driving direction of the core rod can be switched by the knob, so that the stress direction of the ratchet wheel is changed, the advancing direction of the wheelchair is convenient to control, the knob can be automatically reset by the elastic reset element, and the wheelchair is simple in structure and convenient to use.
Description
Technical Field
The invention relates to the technical field of wheelchair equipment, in particular to a knob type gear shifting lever driving device suitable for a wheelchair. The invention also relates to a flat push type lever-driven wheelchair.
Background
The wheelchair is a commonly-used nursing device and is widely applied to the fields of medical treatment and old age. Wheelchairs of the prior art include manually driven wheelchairs and electrically driven wheelchairs. Since electrically driven wheelchairs are too expensive to be used for patients to get on the ground, manually driven wheelchairs are often used in the market. In the manually driven wheelchair, hand-push wheels are arranged on the wheels of the wheelchair, and when the manually driven wheelchair is used, a patient needs to push the hand-push wheels with arms to drive the wheelchair to move forward or backward. Generally, the arm needs to be driven by a large force, and when a patient uses the arm to drive the wheelchair for a long time, strain and strain can be caused to muscles of the shoulder, waist, chest and the like of the user, so that diseases such as scapulohumeral periarthritis, cervical spondylosis, lumbar disc herniation and the like can be caused.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a knob type gear shifting lever driving device which is simple in structure, high in transmission efficiency and labor-saving and is suitable for a wheelchair.
The invention also provides a horizontal push type lever driving wheelchair adopting the knob type gear shifting lever driving device.
The invention aims to solve the technical problem by adopting the following technical scheme, and the knob type gear shifting lever driving device suitable for the wheelchair is characterized by comprising a ratchet wheel driving mechanism for driving the wheelchair and a knob type control rod matched with the ratchet wheel driving mechanism to realize switching between a front gear and a rear gear, wherein the knob type control rod is arranged on a wheel of the wheelchair through the ratchet wheel driving mechanism, and a brake device is arranged on the knob type control rod;
the ratchet wheel driving mechanism comprises a base plate and a ratchet wheel fixedly connected with a wheel of the wheelchair, a fixed shaft which is collinear with the axis of the wheel of the wheelchair is arranged on the base plate through a fixed bearing, and the ratchet wheel is arranged on the fixed shaft through a rolling bearing;
knob formula control lever include the outer tube, well pipe and core bar, well pipe is fixed in the outer tube, the outer tube passes through the steel pipe support to be fixed on the base plate, install the antiskid cover on the outer tube, the core bar is by the upper and lower two body of rod of slip grafting, the top of going up the body of rod is equipped with and is used for rotating the knob that the core bar realized preceding fender and backstop conversion, the knob seat is installed on the top of well pipe, it is equipped with buffer spring to go up the body of rod and the grafting department cover of lower body of rod, the elastic reset element who makes core bar automatic re-setting is installed to the part that the lower body of rod stretches out the outer tube between part and the base plate, the bottom of the lower body of rod is equipped with the drive face of card.
The technical problem to be solved by the invention can also be solved by the following technical scheme that the ratchet wheel is fixedly connected with the wheel of the wheelchair through a wheel connecting mechanism, the wheel connecting mechanism comprises a wheel connecting seat and a connecting sheet fixedly connected with the wheel connecting seat, the wheel connecting seat is fixedly connected with the ratchet wheel through a bolt, and the connecting sheet is fixedly connected with the wheel of the wheelchair through a bolt.
The technical problem to be solved by the invention can be realized by the following technical scheme that three connecting pieces are arranged and are uniformly distributed along the circumferential direction of the wheel connecting seat.
The technical problem to be solved by the invention can also be solved by the following technical scheme that the bottom end of the upper rod body is provided with an inserting part, and the top end of the lower rod body is provided with an inserting groove matched with the inserting part of the upper rod body.
The technical problem to be solved by the invention can also be solved by adopting the following technical scheme that the inserting part is an inserting rod, the top end of the inserting rod is fixedly connected with the upper rod body through a horizontal pin, the bottom end of the inserting rod is fixedly provided with a sliding pin, the groove wall of the inserting groove of the lower rod body is provided with a vertical long hole for the sliding pin to slide up and down, and the buffer spring is sleeved on the inserting rod.
The technical problem to be solved by the present invention can also be solved by the following technical scheme, wherein an upper limiting plate is arranged on the lower rod body above the elastic reset element, and a lower limiting plate matched with the upper limiting plate is arranged on the base plate below the elastic reset element.
The technical problem to be solved by the invention can also be realized by the following technical scheme that the brake device comprises a brake wheel fixedly connected with the ratchet wheel, a brake pad matched with the brake wheel and a brake handle arranged on the outer tube of the knob type control rod, wherein the brake handle is connected with the brake pad through a brake cable.
The invention also aims to solve another technical problem by adopting the following technical scheme, and the horizontal push type lever-driven wheelchair is characterized by comprising a wheelchair body, wherein the knob type gear shifting lever driving devices are symmetrically arranged on two sides of the wheelchair body.
Compared with the prior art, the invention has the following beneficial effects:
(1) according to the invention, the knob control rod and the ratchet wheel driving mechanism are arranged, and the lever principle is utilized to convert the horizontal pushing force of the arm into the rotating force of the ratchet wheel, so that the driving is convenient, labor-saving and efficient; the direction of the driving force of the knob control rod can be switched by the knob on the knob control rod, so that the stress direction of the ratchet wheel is changed, the advancing direction of the wheelchair is convenient to control, the knob can be automatically reset by the elastic reset element, and the wheelchair is simple in structure and convenient to use;
(2) the wheelchair drives the wheelchair to move forwards or backwards by utilizing the lever principle through the knob type gear shifting lever driving devices on the two sides, and can change the speed of the wheelchair wheels on the two sides through the knob type gear shifting lever driving devices, so that the wheelchair can turn through the speed difference, and the wheelchair has the advantages of flexible steering, convenience in use, labor saving, high efficiency and the like.
Drawings
FIG. 1 is a schematic view of the wheelchair of the present invention;
FIG. 2 is a schematic structural view of the knob type shift lever driving device according to the present invention;
FIG. 3 is an exploded view of the knob shift lever actuation device of FIG. 2;
FIG. 4 is a schematic view of the knob lever configuration;
FIG. 5 is a schematic view of the structure of the lower rod body;
FIG. 6 is a schematic structural view of a ratchet drive mechanism;
FIG. 7 is a schematic structural view of a wheel attachment mechanism;
FIG. 8 is an exploded view of the wheel attachment mechanism of FIG. 7;
FIG. 9 is a state view of the ratchet drive mechanism as the wheelchair is advanced;
FIG. 10 is a state diagram of the ratchet drive mechanism as the wheelchair is reversed;
FIG. 11 is a schematic structural view of the brake apparatus;
fig. 12 is a state diagram of the present invention changed to a normally closed type self-locking device.
Detailed Description
The embodiments of the present invention will be further described with reference to the accompanying drawings so as to facilitate the further understanding of the present invention by those skilled in the art, and do not limit the right thereto.
the ratchet wheel driving mechanism comprises a base plate 23 and a ratchet wheel 27 fixedly connected with a wheel of the wheelchair, wherein a fixed shaft 30 which is collinear with the axis of the wheel of the wheelchair is arranged on the base plate 23 through a fixed bearing 25, and the ratchet wheel 27 is arranged on the fixed shaft 30 through a rolling bearing 31;
the knob type control rod 2 comprises an outer tube 12, a middle tube 13 and a core rod, wherein an anti-skidding sleeve 11 is arranged on the outer tube 12, the middle tube 13 is fixed in the outer tube 12, the outer tube 12 is fixed on a base plate 23 through a steel tube support 24, a threaded hole is formed in the outer tube 12, the middle tube 13 is fixed through extrusion of a screw, a plane matched with the screw is milled on the outer wall of the middle tube 13, the middle tube 13 plays a guiding role for the core rod, the core rod consists of an upper rod body and a lower rod body which are in sliding insertion connection, a knob 14 used for rotating the core rod to realize front gear and rear gear conversion is arranged at the top end of the upper rod body 5, a knob seat 15 is arranged at the top end of the middle tube 13, a buffer spring 18 is sleeved at the insertion position of the upper rod body 5 and the lower rod body 9, an elastic reset element 10 enabling the core rod to automatically reset is arranged between the part, the front side of the driving end is provided with a driving surface 20 which is vertically arranged, and the rear side of the driving end is provided with a sliding surface 21 which is obliquely arranged;
referring to fig. 12, the elastic reset element 10 is a reset spring, and the device of the present invention is changed into a normally closed self-locking device by changing the compression state of the reset spring, that is, the reset spring always presses the lower rod body of the core rod, so that the lower rod body is always inserted into the tooth groove of the ratchet wheel/gear, and only under the action of external force, the lower rod body can be separated, and at this time, the device cannot be self-locked, and the structure can be used in self-locking wheelchairs (only patients can be pushed by other people), self-locking sitting station switching shifters, and other similar scenes needing self-locking;
referring to fig. 9, when the wheelchair moves forward, the driving surface of the driving end of the knob control rod is arranged forward, a finger presses down the knob 14, at this time, the driving end of the knob control rod is clamped into the tooth space of the ratchet wheel 27, the knob control rod 2 is pushed forward horizontally to drive the ratchet wheel 27 to rotate, meanwhile, the wheel of the wheelchair and the ratchet wheel 27 synchronously rotate forward through the wheel connecting mechanism 4, so as to drive the whole wheelchair to move forward, at this time, two hands continue to push forward, when the two arms are pushed forward to the maximum extent, the thumb is loosened, under the action of the elastic reset element 10, the core rod is separated from the ratchet wheel 27, the core rod is reset, the two arms are retracted, the knob control rod 2 is reset, and;
referring to fig. 10, during gear shifting, the knob in the forward state is rotated by 180 degrees, the driving surface of the driving end of the knob control rod is arranged backwards, namely, the knob control rod is changed into a backward gear, at the moment, the anti-slip sleeve 11 is held, the arm is firstly straightened to push the knob control rod 2 to the front, the knob 14 is pressed by fingers, at the moment, the driving end of the knob control rod 2 is clamped into the tooth socket of the ratchet wheel 27, the arm is retracted to drive the whole wheelchair to backward, when the arm is retracted to be incapable of being bent continuously, the fingers are loosened, the core rod is reset again, the;
when the wheelchair is in neutral, the fingers do not press the knob, namely the wheelchair is in a neutral state, and at the moment, other people can push the wheelchair to move freely behind the wheelchair;
when braking, the brake can be carried out only by tightly holding the brake handle.
in the process of continuous forward movement of the wheelchair wheel under the action of inertia, if a hand fails to timely loosen the knob, the sliding surface 21 at the driving end of the knob control rod is in sliding fit with the tooth grooves of the ratchet wheel 27, so that the core rod of the knob control rod 2 is jacked upwards, the buffer spring 18 between the upper rod body and the lower rod body of the core rod is compressed, and the core rod is forced to be separated from the ratchet wheel 27, thereby avoiding the damage of the knob type gear shifting lever driving device in the process of inertial movement and improving the safety of the device.
Embodiment 5, the knob type shift lever driving device for wheelchair described in embodiment 1, wherein the upper limiting plate 22 is disposed on the lower rod 9 above the elastic reset element 10, the lower limiting plate 32 is disposed on the base plate 23 below the elastic reset element 10 and is used for limiting the elastic reset element in cooperation with the upper limiting plate, the lower limiting plate 32 is a right angle bracket, and the driving end of the lower rod 9 passes through the lower limiting plate 32 and is matched with the ratchet 27 below the lower limiting plate 32, wherein the positions of the upper limiting plate and the lower limiting plate can be set according to the situation, for example, the lower limiting plate can be disposed on the lower rod, and the upper limiting plate is disposed on the base plate.
Embodiment 6 is a horizontal push type lever-driven wheelchair including a wheelchair body 1, and knob type shift lever driving devices according to embodiments 1 to 5 are symmetrically installed on both sides of the wheelchair body 1.
According to the invention, the knob control rod 2 and the ratchet wheel driving mechanism 3 are arranged, and the lever principle is utilized to convert the horizontal pushing force of the arm into the rotating force of the ratchet wheel 27, so that the driving is convenient, labor-saving and efficient; the direction of the driving force of the knob control rod can be switched by the knob on the knob control rod, so that the stress direction of the ratchet wheel is changed, the advancing direction of the wheelchair is convenient to control, the knob and the core rod can be automatically reset by the elastic reset element, and the wheelchair is simple in structure and convenient to use.
Claims (10)
1. The utility model provides a knob formula lever drive arrangement that shifts suitable for wheelchair which characterized in that: the wheelchair comprises a ratchet wheel driving mechanism for driving the wheelchair and a knob type control rod which is matched with the ratchet wheel driving mechanism to realize switching between a front gear and a rear gear, wherein the knob type control rod is arranged on a wheel of the wheelchair through the ratchet wheel driving mechanism, and a brake device is arranged on the knob type control rod;
the ratchet wheel driving mechanism comprises a base plate and a ratchet wheel fixedly connected with a wheel of the wheelchair, a fixed shaft which is collinear with the axis of the wheel of the wheelchair is arranged on the base plate through a fixed bearing, and the ratchet wheel is arranged on the fixed shaft through a rolling bearing;
the knob type control rod comprises an outer tube, a middle tube and a core rod, wherein the middle tube is fixed in the outer tube, the outer tube is fixed on a base plate through a steel tube support, the core rod is composed of an upper rod body and a lower rod body which are inserted in a sliding mode, a knob used for rotating the core rod to achieve front gear and rear gear conversion is installed at the top end of the upper rod body, a knob seat is installed at the top end of the middle tube, a buffer spring is sleeved at the inserting position of the upper rod body and the lower rod body, an elastic reset element enabling the core rod to reset automatically is installed between the part, extending out of the outer tube, of the lower rod body and the.
2. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: the wheel connecting mechanism comprises a wheel connecting seat and a connecting sheet fixedly connected with the wheel connecting seat, the wheel connecting seat is fixedly connected with the ratchet wheel through a bolt, and the connecting sheet is fixedly connected with the wheel of the wheelchair through a bolt.
3. A knob type shift lever driving device for a wheelchair according to claim 2, wherein: the connection piece is equipped with three, along the circumference evenly distributed of wheel connecting seat.
4. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: the drive end front side of the lower rod body is provided with a vertically arranged drive surface, and the drive end rear side is provided with a sliding surface which is obliquely arranged.
5. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: the bottom of the upper rod body is provided with an inserting part, and the top of the lower rod body is provided with an inserting groove matched with the inserting part of the upper rod body.
6. A knob type shift lever driving device for a wheelchair according to claim 5, wherein: the inserting part is an inserting rod, the top end of the inserting rod is fixedly connected with the upper rod body through a horizontal pin, a sliding pin is fixed at the bottom end of the inserting rod, a vertical long hole for the sliding pin to slide up and down is formed in the groove wall of the lower rod body inserting groove, and the buffer spring is sleeved on the inserting rod.
7. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: an upper limiting plate is arranged on the lower rod body above the elastic reset element, and a lower limiting plate is arranged on the substrate below the elastic reset element.
8. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: the brake device comprises a brake wheel fixedly connected with the ratchet wheel, a brake pad matched with the brake wheel and a brake handle arranged on the outer tube of the knob type control rod, and the brake handle is connected with the brake pad through a brake cable.
9. A knob type shift lever driving device for a wheelchair according to claim 1, wherein: and an anti-skid sleeve is arranged on the outer pipe.
10. A flat push type lever driven wheelchair is characterized in that: comprising a wheelchair body on both sides of which knob type shift lever driving device according to any one of claims 1-9 is symmetrically mounted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995892.6A CN110711085A (en) | 2019-10-18 | 2019-10-18 | Knob formula lever drive arrangement and wheelchair of shifting suitable for wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910995892.6A CN110711085A (en) | 2019-10-18 | 2019-10-18 | Knob formula lever drive arrangement and wheelchair of shifting suitable for wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110711085A true CN110711085A (en) | 2020-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910995892.6A Pending CN110711085A (en) | 2019-10-18 | 2019-10-18 | Knob formula lever drive arrangement and wheelchair of shifting suitable for wheelchair |
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| Country | Link |
|---|---|
| CN (1) | CN110711085A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451242A (en) * | 2020-11-19 | 2021-03-09 | 白直潼 | Device for braking wheelchair used by old people under emergency |
| CN118304102A (en) * | 2024-04-18 | 2024-07-09 | 湘潭医卫职业技术学院 | Wheelchair based on gear transmission and use method |
-
2019
- 2019-10-18 CN CN201910995892.6A patent/CN110711085A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112451242A (en) * | 2020-11-19 | 2021-03-09 | 白直潼 | Device for braking wheelchair used by old people under emergency |
| CN118304102A (en) * | 2024-04-18 | 2024-07-09 | 湘潭医卫职业技术学院 | Wheelchair based on gear transmission and use method |
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