CN201211284Y - Safety wheel chair using self-locking device - Google Patents
Safety wheel chair using self-locking device Download PDFInfo
- Publication number
- CN201211284Y CN201211284Y CNU2008201504975U CN200820150497U CN201211284Y CN 201211284 Y CN201211284 Y CN 201211284Y CN U2008201504975 U CNU2008201504975 U CN U2008201504975U CN 200820150497 U CN200820150497 U CN 200820150497U CN 201211284 Y CN201211284 Y CN 201211284Y
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- gear
- wheelchair
- locking device
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Abstract
The utility model relates to a safe wheel chair using a self-locking device, which belongs to the technical field of disabled walking substituting tool. The safe wheel chair comprises a common wheel chair, a pair of driving hand wheels and a set of self-locking devices. The self-locking devices comprise a deflector rod, a guide rod, a box board, a shifting fork, bearings needed by each shaft joint, a bearing cover for positioning and adjusting each bearing, fastening and connecting screw caps needed by each joint, a large bevel gear in a box body, a small bevel gear, each supporting plate, a first shaft, a third shaft, a second shaft, a worm rod, a worm wheel, a shifting slide gear, a spline and a gear. The safe wheel chair applies the self-locking function of the worm wheel and the worm rod to a driving device of the wheel chair so that the movement and the motive power cannot be transmitted in a reverse direction, that is, the movement and the motive power cannot be transmitted from wheels to an input shaft for inputting the motive power, and the wheels cannot move freely, thus the self-locking effect is achieved.
Description
Technical field
This utility model relates to a kind of wheelchair, specifically is a kind of safety wheelchair of using self-locking device, belongs to the instead of walk for invalids technical field of tools.
Background technology
Wheelchair is not only the walking-replacing tool of limbs the disabled, the more important thing is to make them carry out physical exercise and participate in social activity by means of wheelchair.According to investigation, wheelchair has common wheelchair and electric wheelchair two big classes at present, do not prevent during common wheelchair climb and fall because for numerous wheelchair users, there be very big control difficulty and potential safety hazard in the device that the effect of gravity makes wheelchair can retreat or quicken falling tendency.Electric wheelchair is by the control system of complexity, though the safety problem can solve climb and fall to a certain extent the time, exist cost an arm and a leg, gross weight is big and the big shortcoming that consumes energy.
Find that through literature search Chinese utility model patent " wheelchair climb and fall safety device " (patent publication No. 200620158368.1) proposes to realize safe climb and fall operation by a cover upward slope shoe and downhill retardation device are installed on wheelchair to prior art.Its deficiency is: climb and fall realizes that by two cover isolated systems every covering device structure more complicated causes the increase of wheelchair gross weight and volume.This device still can cause certain wearing and tearing to wheel simultaneously.
The utility model content
The purpose of this utility model is at the deficiencies in the prior art, and a kind of safety wheelchair of using self-locking device is provided.This utility model is a prototype with common wheelchair, designs and increases by a self-locking device that overlaps based on the worm and gear self-lock mechanism and solve the problems referred to above.
This utility model is achieved through the following technical solutions.The safety wheelchair of the application self-locking device that this utility model provides comprises common wheelchair, two driving handwheels and a cover self-locking device.The driving handwheel that symmetry is installed in the wheelchair both sides is connected with first by flat key, drives handwheel and first and clamps by the nut location.Self-locking device is fixed on the wheelchair bottom by its external box of microvave.
In this utility model, self-locking device comprises: driving lever, guide rod, boxboard, shift fork, bevel gear wheel, bevel pinion, each gripper shoe, first, the 3rd, second, worm screw, worm gear, shifting slide gear, spline, gear.Bevel gear wheel is connected with first by flat key, bevel pinion is connected with flat key with the end of worm screw, the assembly that bevel pinion and worm screw are formed is connected on the boxboard by a pair of gripper shoe, driving lever and shift fork link together by screw, driving lever one end moves along guide rod, place two rubber rings on the guide rod and constitute two boss, shifting slide gear is connected with second by spline, worm gear is crossed flat key and is fixed on second, gear is fixed on the 3rd, the 3rd two ends are connected with wheel respectively, and relative boxboard connects fastening by connecting plate.Shifting slide gear and gears engaged.
Mobile driving lever makes it to move along guide rod, and the shifting slide gear that then can drive clamping in the shift fork moves freely on second.Shifting slide gear and gears engaged when the boss on driving lever and guide rod meets, this moment, wheelchair entered the self-locking duty, and the rotating drive handwheel can drive wheelchair; Reverse more mobile driving lever then when the boss of itself and opposite side meets shifting slide gear and gear break away from engagement, get back to common wheelchair duty.
The utility model has the advantages that security performance is good, independent operation is strong, and without any wearing and tearing, principle and mechanism are simple and practical to wheel, just can realize climb and fall safety operation brake function pacifically simultaneously by a covering device.In light weight, device is portable good.Cost is low, the huge market demand.
Description of drawings
Fig. 1 is this utility model population structure sketch map.
Fig. 2 is the inside elevation view of self-locking device.
Fig. 3 is a partial view.
Fig. 4 is A-A cutaway view.
Fig. 5 is the B-B cutaway view.
Fig. 6 is for driving the cutaway view of handwheel.
Fig. 7 is the D-D cutaway view.
1. driving levers among the figure, 2. guide rod, 3. boxboard, 4. shift fork, 5. bearing cap 6. drives handwheel, 7. snap ring, 8. nut, 9. pad, 10. bearing, 11. bevel gear wheels, 12. bevel pinions, 13. gripper shoe, 14. connecting plates, 15. first, 16. the 3rd, 17. second, 18. worm screws, 19. worm gears, 20. shifting slide gears, 21. spline, 22. gears, 23. common wheelchairs.
The specific embodiment
Below in conjunction with accompanying drawing the technical solution of the utility model is further detailed.
As shown in Figure 1, the safety wheelchair of the application self-locking device that provides of this utility model comprises 23, two driving handwheels of common wheelchair and a cover self-locking device.Right side driving handwheel 6 and left side driving handwheel (omitting among Fig. 1) symmetry respectively are installed in common wheelchair 23 left and right sides.Self-locking device is fixed on common wheelchair bottom by its external box of microvave.
Fig. 2 shows the internal structure and the outside connection diagram of self-locking device.
Self-locking device comprises: the required bearing of driving lever 1, guide rod 2, boxboard 3, shift fork 4, each shaft connection place (only mark among the figure and support first bearing---label 10 is example), each bearing is positioned bearing cap (only mark 5 among the figure and be example), the intravital bevel gear wheel 11 of case, bevel pinion 12, each gripper shoe 13 of adjustment, first 15, the 3rd 16, second 17, worm screw 18, worm gear 19, shifting slide gear 20, spline 21, gear 22.
Fig. 3 partial view shows in the self-locking device outside, drives handwheel (being example with the right side only) and is snap ring 7 and pad 9 and link together by flat key and first 15 under the clamping action of nut 8.Can on first, regulate the position driving handwheel by the number that changes snap ring 7 and pad 9.
Fig. 4 has shown the spatial relation of big bevel pinion and worm and gear, and bevel pinion 12 is directly installed on the worm screw 18, and the assembly of the two composition is fixed on the boxboard by gripper shoe 13.
Fig. 5 has shown that shifting slide gear 20 is connected with second 17 by spline 21, and gear 22 is by flat key and the 3rd 16 relation that is connected.
Fig. 6 has shown that driving handwheel 6 and first 15 are connected and fixed relation by flat key.
Fig. 7 shows the spatial relation that relative boxboard is fixedly connected by connecting plate 14 and each is relative.
This utility model utilizes the self-lock mechanism and the unidirectional delivery of its critical piece worm and gear by the self locking safety device of wheelchair bottom, people's rotating drive handwheel when guaranteeing climbing, and wheelchair just can successfully be climbed up the slope.During descending, staff also must just can roll down the slope by rotating drive handwheel wheel, and is so just safer than brake gear.When staff was not exerted oneself, general wheelchair was owing to the effect wheel of gravity will roll downwards, and owing to the self-locking performance of mechanism, the rotation of the impossible drive of worm gear worm screw that is to say the impossible spontaneous rotation of wheel, and wheelchair will be parked in upward sloping and can not glide like this.
When climb and fall, stir driving lever 1 to the right with hands, make shift fork 4 drive shifting slide gear 20 and on second 17, move.When the right side boss on driving lever 1 and the guide rod 2 meets, shifting slide gear 20 stop motions, and with gear 22 engagement that is fixed on the 3rd 16, this moment, wheelchair transferred independent climb and fall duty to.During upward slope, firmly drive handwheel 6, driving force passes to the 3rd 16 through first 15, bevel gear wheel 11, bevel pinion 12, scroll bar 18 and worm gear 19, second spool 17 and shifting slide gear 20 and gear 22, drives wheel at last and rotates, and wheelchair 23 is upwards advanced.When the people stops firmly, owing to worm and gear self-lock mechanism wheelchair can be owing to reasons such as gravity retreat; When descending, the staff moving runner keeps suitable descending speed, when the people stops firmly, because worm and gear self-lock mechanism wheelchair just is parked in the relevant position.Can be owing to the gravity reason is quickened to glide.The people is if continue to exert oneself the rotating drive handwheel, and then wheelchair continues to advance downwards.By changing the number of teeth of big bevel pinion, shifting slide gear and gear, the modulus of worm and gear obtains suitable gear ratio in actual applications, makes the gait of march that drives required driving force of handwheel and wheelchair in reasonable range.
When level walking, stir driving lever left with hands, make shift fork drive shifting slide gear and on second, move.When the left side boss on driving lever and the guide rod meets, the shifting slide gear stop motion, and break away from engagement with the gear that is fixed on the 3rd, this moment, wheelchair transferred common wheelchair duty to.The people advances fast by direct driving wheel.When the state of emergency such as chance barrier, oppositely stir shift fork and make shifting slide gear 20 and gear 22 engagements, get back to the self-locking duty, thereby can play braking action.
Claims (2)
1 one kinds of safety wheelchairs of using self-locking device, comprise common wheelchair, an a pair of driving handwheel and a cover self-locking device, in common wheelchair bottom one cover self-locking device is installed, in the symmetry of wheelchair both sides a pair of driving handwheel is installed, it is characterized in that, self-locking device comprises: driving lever, guide rod, boxboard, shift fork, bevel gear wheel, bevel pinion, each gripper shoe, first, the 3rd, second, worm screw, worm gear, shifting slide gear, spline, gear, bevel gear wheel is connected with first by flat key, bevel pinion is connected with flat key with the end of worm screw, the assembly that bevel pinion and worm screw are formed is connected on the boxboard by a pair of gripper shoe, driving lever and shift fork link together by screw, driving lever one end moves along guide rod, place two rubber rings on the guide rod and constitute two boss, shifting slide gear is connected with second by spline, worm gear is crossed flat key and is fixed on second, gear is fixed on the 3rd, the 3rd two ends are connected with wheel respectively, relative boxboard connects fastening by connecting plate, shifting slide gear and gears engaged.
2, the safety wheelchair of application self-locking device according to claim 1 is characterized in that driving handwheel and is snap ring and pad and links together by flat key and first under the clamping action of nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201504975U CN201211284Y (en) | 2008-07-03 | 2008-07-03 | Safety wheel chair using self-locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201504975U CN201211284Y (en) | 2008-07-03 | 2008-07-03 | Safety wheel chair using self-locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201211284Y true CN201211284Y (en) | 2009-03-25 |
Family
ID=40495438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201504975U Expired - Fee Related CN201211284Y (en) | 2008-07-03 | 2008-07-03 | Safety wheel chair using self-locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201211284Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105147468A (en) * | 2015-09-12 | 2015-12-16 | 郜鹏 | Spring energy storage wheelchair |
| CN105362005A (en) * | 2015-12-02 | 2016-03-02 | 广西大学 | Adjustable wheelchair |
| CN106207864A (en) * | 2016-09-28 | 2016-12-07 | 国网四川省电力公司检修公司 | A kind of manned dolly on 500kV strain insulator string |
| CN107928923A (en) * | 2017-12-22 | 2018-04-20 | 东莞市松研智达工业设计有限公司 | A kind of sick bed frame with gradient self-locking |
| CN117281695A (en) * | 2023-11-22 | 2023-12-26 | 中国人民解放军总医院第三医学中心 | Orthopedics lower limb rehabilitation training wheelchair |
-
2008
- 2008-07-03 CN CNU2008201504975U patent/CN201211284Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105147468A (en) * | 2015-09-12 | 2015-12-16 | 郜鹏 | Spring energy storage wheelchair |
| CN105362005A (en) * | 2015-12-02 | 2016-03-02 | 广西大学 | Adjustable wheelchair |
| CN106207864A (en) * | 2016-09-28 | 2016-12-07 | 国网四川省电力公司检修公司 | A kind of manned dolly on 500kV strain insulator string |
| CN107928923A (en) * | 2017-12-22 | 2018-04-20 | 东莞市松研智达工业设计有限公司 | A kind of sick bed frame with gradient self-locking |
| CN117281695A (en) * | 2023-11-22 | 2023-12-26 | 中国人民解放军总医院第三医学中心 | Orthopedics lower limb rehabilitation training wheelchair |
| CN117281695B (en) * | 2023-11-22 | 2024-02-23 | 中国人民解放军总医院第三医学中心 | Orthopedics lower limb rehabilitation training wheelchair |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090325 |