CN203988721U - A kind of pull bar power assisted wheelchair structure - Google Patents
A kind of pull bar power assisted wheelchair structure Download PDFInfo
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- CN203988721U CN203988721U CN201420361790.1U CN201420361790U CN203988721U CN 203988721 U CN203988721 U CN 203988721U CN 201420361790 U CN201420361790 U CN 201420361790U CN 203988721 U CN203988721 U CN 203988721U
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- Prior art keywords
- ratchet
- pull bar
- support body
- rear axle
- wheelchair
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- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 210000002445 nipple Anatomy 0.000 claims description 2
- 230000004899 motility Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Abstract
A kind of pull bar power assisted wheelchair structure, comprise wheelchair support body, be located at the seat on wheelchair support body, also comprise pull bar, road wheel, be located at the ratchet drive mechanism of wheelchair support body both sides, described wheelchair support body is provided with front axle and rear axle, and described road wheel is connected with described front axle and rear axle; Described ratchet drive mechanism comprises ratchet and the driven gear being located at the power shaft of wheelchair support body, the rolling disc that is connected in power shaft and ratchet, arranging along rolling disc edge, described ratchet inside is provided with around the ratchet of rolling disc edge placement, the ratchet engagement of described ratchet and ratchet, ratchet neighboring is provided with the active gear teeth that engage with driven gear, and described driven gear is connected with rear axle; The lower end of described pull bar is connected with power shaft, upper end extends to seat top.The utlity model has laborsaving, strong adaptability, motility and safe advantage.
Description
Technical field
This utility model relates to wheelchair, especially adopts the Wheelchair structure of pull bar power-assisted.
Background technology
Wheelchair is significant to vast handicapped patient, has solved the trip problem of shank disabled patient.The type of drive of existing push-chairs is generally by the steel ring that can rotate for hands in the coaxial setting of wheel, and the arm strength of dependence user pulls and makes it to rotate, and realizes and advances and turn to.Its shortcoming is, the arm strength of user is had relatively high expectations, laborsaving not, and patient or the old people weak for arm strength cannot realize autonomous trip, still need family members pushing away in the back, cannot meet extensive patients to the requirement of freely going on a journey.
Utility model content
The technical problems to be solved in the utility model is to provide a kind of pull bar power assisted wheelchair structure of Labor-saving high-efficiency.
In order to solve the problems of the technologies described above, this utility model provides a kind of pull bar power assisted wheelchair structure, comprise wheelchair support body, be located at the seat on wheelchair support body, also comprise pull bar, road wheel, be located at the ratchet drive mechanism of wheelchair support body both sides, described wheelchair support body is provided with front axle and rear axle, and described road wheel is connected with described front axle and rear axle; Described ratchet drive mechanism comprises ratchet and the driven gear being located at the power shaft of wheelchair support body, the rolling disc that is connected in power shaft and ratchet, arranging along rolling disc edge, described ratchet inside is provided with around the ratchet of rolling disc edge placement, the ratchet engagement of described ratchet and ratchet, ratchet neighboring is provided with the active gear teeth that engage with driven gear, and described driven gear is connected with rear axle; The lower end of described pull bar is connected with power shaft, upper end extends to seat top.
As optimal way, also comprise the ratchet casing that is fixed on wheelchair support body and surrounds ratchet drive mechanism, described power shaft is connected in ratchet casing.
As optimal way, described power shaft end protrudes from ratchet casing outside, and end radially has screwed hole, and pull bar lower end is connected and fixes by nut with described end thread.
As optimal way, also comprise chain wheel driving mechanism, described chain wheel driving mechanism comprises chain and is connected in front axle and the sprocket wheel of rear axle, the sprocket wheel on front axle and the rear axle of wheelchair support body the same side is socketed by chain.
As optimal way, described road wheel can only rotate forward.
As optimal way, described road wheel is connected with front axle and rear axle by the unilateral bearing only rotating forward.
As optimal way, in described road wheel, be provided with the second ratchet, described front axle and rear axle are provided with described the second ratchet engagement and can stop its counter-rotational the second ratchet,
As optimal way, also comprise the brake block that is connected in rear axle and the hand brake device that can lock brake block, this hand brake device is located at described pull bar upper end.
As optimal way, described ratchet is positioned at driven gear oblique upper.
As optimal way, the upper end of described pull bar is L-shaped and towards seat inner side.
Compared with prior art, the Wheelchair structure tool of this utility model pull bar power-assisted has the following advantages:
1, the Wheelchair structure of this utility model pull bar power-assisted utilizes unidirectional drive characteristic and the lever principle of ratchet drive mechanism, user only need make very little power repeatedly push-and-pull pull bar can drive wheelchair to advance, convenient and strength-saving, be easy to manipulation, make the weak patient of arm strength also can realize free trip.
2, this utility model also comprises chain wheel driving mechanism, described chain wheel driving mechanism comprises sprocket wheel and chain, sprocket wheel on front axle and the rear axle of wheelchair support body the same side is socketed by chain, sprocket wheel on rear axle is by the sprocket wheel of chain-driving front axle, thereby make the road wheel of front axle obtain driving force, realize four-wheel drive, to adapt to more complicated landform, improve safe and applicable.
3, road wheel of the present utility model also can be realized one-directional rotation, be that the unilateral bearing that road wheel passes through only to rotate is forward connected with front axle and rear axle, or in described road wheel, be provided with the second ratchet, described front axle and rear axle are provided with described the second ratchet engagement and can stop its counter-rotational the second ratchet.In the time going up a slope, unilateral bearing or the second ratchet and the second ratchet stop road wheel to rotate backward, and avoid under slope, falling in the time going up a slope backward, without using parking brake, have greatly improved safety, and patient can be gone on a journey more carefreely.
4, this utility model also comprises the brake block that is connected in rear axle and the hand brake device that can lock brake block, this hand brake device is located at described pull bar upper end, parking brake but can realize the function of slowing-down brake, can also realize turning function, only need check the road wheel of a side, the pull bar of push-and-pull opposite side rotates opposite side road wheel, road wheel that can be static is center of circle rotation, realization turns to, and has advantages of that radius of turn is little, and motility is good.
Brief description of the drawings
Below in conjunction with the drawings and specific embodiments, this utility model is described in further detail:
Fig. 1 is the side-looking structure chart of this utility model pull bar power assisted wheelchair structure.
Fig. 2 is the main TV structure figure of this utility model pull bar power assisted wheelchair structure.
Fig. 3 is the partial enlarged drawing of A portion in Fig. 1.
Fig. 4 is the partial enlarged drawing of B portion in Fig. 2.
Wherein, the Reference numeral of above-mentioned accompanying drawing and the corresponding relation of component names are as follows:
Seat 101; Pull bar 102; Nut 103; Road wheel 105; Front axle 107; Rear axle 108; Ratchet 202; Ratchet 203; The initiatively gear teeth 204; Driven gear 205; Rolling disc 206; Power shaft 207; Ratchet casing 208; Sprocket wheel 301; Chain 303.
Detailed description of the invention
Be side-looking structure chart and the main TV structure figure of this utility model pull bar power assisted wheelchair structure as depicted in figs. 1 and 2, comprise wheelchair support body 10, be located at seat 101, pull bar 102, road wheel 105 on wheelchair support body 10, be located at ratchet drive mechanism and the chain wheel driving mechanism of wheelchair support body 10 both sides.Described wheelchair support body 10 is provided with front axle 107 and rear axle 108, and described road wheel 105 is connected with described front axle 107 and rear axle 108.For ease of understanding, in the present embodiment, the level that front refers to seat 101 seats is towards (be the health of user while being sitting on seat 101 towards), and the left and right sides is the left and right sides of seat 101.
Fig. 3 and Fig. 4 are the partial enlarged drawing of A portion and B portion in Fig. 1 and Fig. 2, mainly show the structure of ratchet drive mechanism, described ratchet drive mechanism comprises ratchet 203 and the driven gear 205 being located at the power shaft 207 of wheelchair support body 10, the rolling disc 206 that is connected in power shaft 207 and ratchet 202, arranging along rolling disc 206 edges.Described ratchet 202 inside are provided with around the ratchet of rolling disc 206 edge placement, the ratchet engagement of described ratchet 203 and ratchet 202, and ratchet 202 neighborings are provided with the active gear teeth 204 that engage with driven gear 205, and described driven gear 205 is connected with rear axle 108.Described ratchet 202 is preferably placed at driven gear 205 oblique uppers, is conducive to increase the length of pull bar 102, more laborsaving when push-and-pull.
For ensure ratchet drive mechanism service life and smooth, avoid foreign object stop up, this utility model also comprises the ratchet casing 208 that is fixed on wheelchair support body 10 and surrounds ratchet drive mechanism, described power shaft 207 is connected in ratchet casing 208, power shaft 207 end nipple are for ratchet casing 208 outsides, end radially has screwed hole, the lower end of pull bar 102 is connected with described end thread and passes through nut 103 and fix, and while not using pull bar 102, can be dismantled.The upper end of pull bar 102 extends to seat 101 tops, and the upper end of described pull bar 102 is L-shaped and towards seat 101 inner sides, so that user push-and-pull pull bar 102 drives power shaft 207 to rotate.
Taking direction shown in Fig. 1 as example, when user pulls the upper end of pull bar 102, the lower end of pull bar 102 drives power shaft 207 to clockwise rotate, power shaft 207 drive rolling disc 206 and on ratchet 203 rotate, the ratchet that described ratchet 203 promotes ratchet 202 makes it to clockwise rotate, the driven gear 205 engaging with ratchet 202 rotates counterclockwise, and the road wheel 105 coaxial with driven gear 205 also rotates counterclockwise, thereby drives wheelchair to advance; In the time of user pushing drawing rod 102, ratchet 203 streaks and resets from the ratchet back side of ratchet 202, to pull next time pull bar 102 to drive.This utility model utilizes unidirectional drive characteristic and the lever principle of ratchet drive mechanism, user only need make very little power repeatedly push-and-pull pull bar 102 can drive wheelchair to advance, convenient and strength-saving, realize freely go on a journey.In like manner, adjust the ratchet engagement direction of ratchet 203 and ratchet 202, pushing drawing rod 102 just can be realized and drive wheelchair to advance.
This utility model also comprises chain wheel driving mechanism, described chain wheel driving mechanism comprises sprocket wheel 301 and chain 303, sprocket wheel 301 on front axle 107 and the rear axle 108 of wheelchair support body 10 the same sides is socketed by chain 303, sprocket wheel 301 on rear axle 108 drives the sprocket wheel 301 of front axle 107 by chain 303, thereby make the road wheel 105 of front axle 107 obtain driving force, realize four-wheel drive, to adapt to more complicated landform, improve the suitability.
For described road wheel 105 can only be rotated forward, fall when avoiding going up a slope backward, can realize by following two kinds of modes: described road wheel 105 is connected with front axle 107 and rear axle 108 by the unilateral bearing only rotating forward; In described road wheel 105, be provided with the second ratchet, described front axle 107 and rear axle 108 are provided with described the second ratchet engagement and can stop its counter-rotational the second ratchet.In the time going up a slope, unilateral bearing and the second ratchet and the second ratchet stop road wheel 105 to rotate backward, and avoid falling under Shang Xiang slope, slope backward.
This utility model also comprises the brake block that is connected in rear axle 108 and the hand brake device that can lock brake block, and this hand brake device is located at described pull bar 102 upper ends, and this hand brake device and brake block adopt the brake system of existing bicycle, repeat no more.Parking brake but can realize the function of slowing-down brake, can also realize turning function, only need check the road wheel 105 of a side, the pull bar 102 of push-and-pull opposite side rotates opposite side road wheel 105, road wheel 105 that can be static is center of circle rotation, realization turns to, and has advantages of that radius of turn is little, and motility is good.
Claims (10)
1. a pull bar power assisted wheelchair structure, comprise wheelchair support body (10), be located at the seat (101) on wheelchair support body (10), it is characterized in that: also comprise pull bar (102), road wheel (105), be located at the ratchet drive mechanism of wheelchair support body (10) both sides, described wheelchair support body (10) is provided with front axle (107) and rear axle (108), and described road wheel (105) is connected with described front axle (107) and rear axle (108);
Described ratchet drive mechanism comprises the power shaft (207) of being located at wheelchair support body (10), be connected in rolling disc (206) and the ratchet (202) of power shaft (207), the ratchet (203) and the driven gear (205) that arrange along rolling disc (206) edge, described ratchet (202) inside is provided with around the ratchet of rolling disc (206) edge placement, the ratchet engagement of described ratchet (203) and ratchet (202), ratchet (202) neighboring is provided with the active gear teeth (204) that engage with driven gear (205), described driven gear (205) is connected with rear axle (108),
Above the lower end of described pull bar (102) is connected with power shaft (207), upper end extends to seat (101).
2. a kind of pull bar power assisted wheelchair structure according to claim 1, it is characterized in that: also comprise the ratchet casing (208) that is fixed on wheelchair support body (10) and surrounds ratchet drive mechanism, described power shaft (207) is connected in ratchet casing (208).
3. a kind of pull bar power assisted wheelchair structure according to claim 1, it is characterized in that: described power shaft (207) end nipple is for ratchet casing (208) outside, end radially has screwed hole, and pull bar (102) lower end is connected with described end thread and passes through nut (103) and fix.
4. according to a kind of pull bar power assisted wheelchair structure described in claim 1～3 any one, it is characterized in that: also comprise chain wheel driving mechanism, described chain wheel driving mechanism comprises chain (303) and is connected in front axle (107) and the sprocket wheel (301) of rear axle (108), and the sprocket wheel (301) on front axle (107) and the rear axle (108) of wheelchair support body (10) the same side is by chain (303) socket.
5. a kind of pull bar power assisted wheelchair structure according to claim 4, is characterized in that: described road wheel (105) can only rotate forward.
6. a kind of pull bar power assisted wheelchair structure according to claim 5, is characterized in that: described road wheel (105) is connected with front axle (107) and rear axle (108) by the unilateral bearing only rotating forward.
7. a kind of pull bar power assisted wheelchair structure according to claim 5, it is characterized in that: described road wheel is provided with the second ratchet in (105), described front axle (107) and rear axle (108) are provided with described the second ratchet engagement and can stop its counter-rotational the second ratchet.
8. a kind of pull bar power assisted wheelchair structure according to claim 4, it is characterized in that: also comprise the brake block that is connected in rear axle (108) and the hand brake device that can lock brake block, this hand brake device is located at described pull bar (102) upper end.
9. a kind of pull bar power assisted wheelchair structure according to claim 4, is characterized in that: described ratchet (202) is positioned at driven gear (205) oblique upper.
10. a kind of pull bar power assisted wheelchair structure according to claim 4, is characterized in that: the upper end of described pull bar (102) is L-shaped and towards seat (101) inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361790.1U CN203988721U (en) | 2014-07-01 | 2014-07-01 | A kind of pull bar power assisted wheelchair structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361790.1U CN203988721U (en) | 2014-07-01 | 2014-07-01 | A kind of pull bar power assisted wheelchair structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203988721U true CN203988721U (en) | 2014-12-10 |
Family
ID=52028807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420361790.1U Expired - Fee Related CN203988721U (en) | 2014-07-01 | 2014-07-01 | A kind of pull bar power assisted wheelchair structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203988721U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757843A (en) * | 2018-03-30 | 2018-11-06 | 合肥工业大学 | A kind of driving mechanism and the rehabilitation wheelchair for being equipped with the driving mechanism |
-
2014
- 2014-07-01 CN CN201420361790.1U patent/CN203988721U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108757843A (en) * | 2018-03-30 | 2018-11-06 | 合肥工业大学 | A kind of driving mechanism and the rehabilitation wheelchair for being equipped with the driving mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20190701 |
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| CF01 | Termination of patent right due to non-payment of annual fee |