CN202458985U - Power transmission system of electric wheelchair - Google Patents
Power transmission system of electric wheelchair Download PDFInfo
- Publication number
- CN202458985U CN202458985U CN2011204345972U CN201120434597U CN202458985U CN 202458985 U CN202458985 U CN 202458985U CN 2011204345972 U CN2011204345972 U CN 2011204345972U CN 201120434597 U CN201120434597 U CN 201120434597U CN 202458985 U CN202458985 U CN 202458985U
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- wheel hub
- wheelchair
- motor
- gear
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Abstract
The utility model provides a power transmission system of an electric wheelchair, including a direct current motor and a transmission mechanism, and the direct current motor is connected to a control mechanism controlling the rotation speed of the motor. The output gear on the output shaft of the motor is connected to a secondary planetary gear set, the output shaft of the planetary gear set is connected to the wheel hub of the driving wheel of a wheelchair. A A clutch, which is a spindle sleeve, which is provided with a keyway in the inner ring surface, and the keyway is movably cooperated with a key shaft which is taken as the output shaft of the planetary gear set, the external end face of the clutch is provided with a protruding tooth which is cooperated with the groove in the internal end face of the wheel hub, a poking claw connected at the bottom of an inverted Y-shaped shift fork is clamped in the annular notch in the external annular surface of the clutch, the shift lever of the shift fork swings, the poking claw pokes the clutch to slide on the key shaft, the clutch moves outwards to engage with the groove of the wheel hub, and the motor drives the wheel hub to rotate, the clutch moves inwards to disengage with the wheel hub, and the driving wheel of the wheelchair can be operated by hands. The system transmitted by the planetary gear is large in reduction ratio, the efficiency reaches more than 95%, thus, the system is significant in energy saving and low in cost; and the system is small in size and simple in structure, the self-weight of the wheelchair is reduced; in addition, the system is stable in running and convenient in use.
Description
(1) technical field
This utility model relates to the electric wheelchair technical field, is specially a kind of power drive system of electric wheelchair.
(2) background technology
All need use wheelchair as walking-replacing tool for the people that walking disorder is arranged.The whole world has 6.5 hundred million disableds approximately at present, and they need the whole society to give more concern.The old people also needs wheelchair to certain age legs and feet inconvenience.The present old people of China has accounted for whole world old man's 22%, 14% of full Asia.The end of last year, the aging population statistical number of China's over-65s reached 1.67 hundred million, and according to the prediction of World Health Organization (WHO), the year two thousand twenty whole world aging population will reach 6.9 hundred million.In number reached tens00000000 old people and disabled, even only have 20% to use electric wheelchair, the market space of wheelchair also was very big.
Electric wheelchair is because of motor being arranged as power, and is laborsaving, easy to operate, fast and steady, is widely used.The drive system of electric wheelchair is its core component.
Conventional electric-powered wheel power drive system, major part that Wheel-chair adopted have been the brush direct current generator and have become 90 ° of angle Drive Structure with the worm reducer output shaft.Its advantage is that structure is very simple, but transmission efficiency is low.As everyone knows, worm reducer belongs to frictional drive, and its transmission efficiency is very low, and machining accuracy reaches five-star Worm screw and worm-gear drive transmission efficiency also less than 65%.This Drive Structure significant amount of energy consumes on the resistance of frictional drive, and the resistance that overcomes frictional drive produces a large amount of heat, has to increase radiator structure, so that the heat that resistance produced distributes as early as possible.It is lower equally that the transmission efficiency and the service life of brush direct current generator are arranged in addition.The friction of carbon brush and rotor, press factors such as touching resistance that the energy consumption of brush direct current generator is strengthened, transmission efficiency reduces.Because the overall efficiency of conventional electric wheelchair power drive structure is low, gets only expanded motor power.The power of motor of a present common electric wheelchair is up to 600 watts.
Calculate theoretically; Adopt manufacturing technology to require to close the wheelchair chassis of symbol industrial standard, its load is 90kg, and when light weight≤45kg, vehicle started from halted state, its output torque only needed about 12 newton/meter.When using the 36v dc source to drive the direct current generator of a power 310W,, can reach designing requirement if transmission efficiency is about 80%.
By this gross data, the general energy consumption of electric wheelchair in the market all exceeds standard 30～40%, and the waste of its resource is surprising, and this has also increased wheelchair user's financial burden.
Under the spring tide of current energy-saving and environmental protection low-carbon (LC), the power drive system of electric wheelchair needs to improve.
(3) utility model content
The purpose of this utility model is the power drive system of a kind of electric wheelchair of design, adopts brshless DC motor and epicyclic transmission mechanism, significantly improves transmission efficiency.
The power drive system of the electric wheelchair of this utility model design comprises direct current generator and drive mechanism; Said direct current generator is fixedly installed in wheelchair frame; Direct current generator is connected with controlling organization, and controlling organization has the current of electric adjustment module, according to the signal of the control device that is connect; Regulate the motor supply current, the control motor speed.
Motor output shaft connects the two-stage planet group, and the output shaft of the planetary gearsets after the deceleration is connected with the wheel hub of the driving wheel of wheelchair.Fixing output gear on the motor output shaft; On three primary planet pinion axles on the medial surface of one-level star frame a primary planet pinion is installed respectively; Ring gear has the internal tooth that matches with primary planet pinion, is fixedly installed in the transmission shell, and the transmission shell is fixedly connected with wheelchair frame.Three primary planet pinions are meshed with the output gear of motor, are meshed with the internal tooth of ring gear simultaneously; On the lateral surface of one-level star frame the central shaft gear is arranged; On three secondary planetary gear axles on the medial surface of secondary star frame a secondary planetary gear is installed respectively, three secondary planetary gears are meshed with the central shaft gear of one-level star frame, are meshed with the internal tooth of ring gear simultaneously; The lateral surface center of secondary star frame is the key axle, and promptly the output shaft of this planet gear train is connected with the wheel hub of wheelchair driving wheel.
Said direct current generator is a brshless DC motor.
The output shaft of planetary gearsets is connected through the wheel hub of clutch with the wheelchair driving wheel.Clutch is an axle sleeve, and the keyway of its inner ring surface matches with the key axle, and the two is for movingly, and there is double wedge the outer face of clutch; Matching with the groove on the wheel hub inner face, is annular slot on the clutch outer ring surface, and shift fork is the shape of falling Y, is driving lever on it; The bottom connects 2 pusher dogs, and pusher dog is stuck in the annular slot of clutch, when the driving lever swing; Shift fork is stirred clutch and on the key axle, is slided, and outside clutch, moves, its double wedge and wheel hub engagement, and the power of motor output drives the wheel hub rotation through the planetary gearsets back of slowing down; Wheel hub is stirred in the clutch and move, broken away to shift fork, and the wheelchair driving wheel separates with motor, available manual.
The driving lever of shift fork upper end joins with rotating shaft, rotating shaft be level and be in vertical of key axle on, be fixed in wheelchair frame rotationally, rotating shaft one end is equipped with clutch handle, rotates clutch handle, rotating shaft coaxial rotation, the shift fork swing that it connect.
For guaranteeing the stable of key axle, key axle axle head is rotatably installed on wheel hub through hub bearing, and key axle axle head has spacing draw-in groove, and spacing card inlay card carries out axial limiting in spacing draw-in groove.Also have 1 bearing on the key axle at least, be installed on transmission shell or wheelchair frame.
The advantage of the power drive system of this utility model electric wheelchair is: 1, adopt the planetary gear transmission; Speed reducing ratio is big; And efficient reaches more than 95%, is much higher than the transmission efficiency of worm reducer, adopts the power of the used motor of this drive system common electric wheelchair can reduce more than 1/3; Energy-saving effect is obvious, and has reduced cost; 2, volume is little, and is simple in structure, is beneficial to optimize the wheelchair overall structure, alleviates the wheelchair deadweight; 3, bearing capacity is big, stable working, and easy operating is convenient to disabled and is used.
(4) description of drawings
Fig. 1 is the power drive system embodiment overall appearance schematic perspective view of this electric wheelchair;
Fig. 2 is the power drive system embodiment of this electric wheelchair and the sketch map of wheel hub joint face;
Fig. 3 is that the A-A of Fig. 2 is to cutaway view;
Fig. 4 is that the power drive system embodiment of this electric wheelchair is connected sketch map with trailing wheel;
Fig. 5 is that the B-B of Fig. 4 is to cutaway view;
Fig. 6 is each disassembled assembling sketch map of power drive system embodiment of this electric wheelchair.
The figure internal label is: 1, motor, 2, epicyclic transmission mechanism, 21, the key axle, 211, the key axle bearing, 22, secondary star frame; 23, secondary planetary gear, 24, ring gear, 25, one-level star frame, 26, primary planet pinion, 3, shift fork; 31, rotating shaft, 32, clutch handle, 4, wheelchair frame, 41, guard shield, 5, clutch; 6, trailing wheel, 61, wheel hub, 611, hub bearing, 612, spacing card.
(5) specific embodiment
The power drive system embodiment outward appearance of this electric wheelchair is like Fig. 1, shown in 2 and 4; Comprise direct current generator 1 and epicyclic transmission mechanism 2; Said direct current generator 1 is a brshless DC motor, is fixedly installed in wheelchair frame 4, and direct current generator 1 is connected with controlling organization; Controlling organization has the motor of adjusting supply current, the current of electric adjustment module of control motor speed.
Motor output shaft connects the two-stage planet group, and the output shaft of the planetary gearsets after the deceleration is connected with the rear-wheel hub of wheelchair 61.Like Fig. 3, shown in 5 and 6; Fixing output gear on the motor output shaft; On three primary planet pinion axles on the medial surface of one-level star frame 25 primary planet pinion 26 is installed respectively; Ring gear 24 has the internal tooth that matches with primary planet pinion 26, is fixedly installed in the transmission shell 41, and transmission shell 41 is fixedly connected with wheelchair frame 4.Three primary planet pinions 26 are meshed with the output gear of motor, are meshed with the internal tooth of ring gear 24 simultaneously; On the lateral surface of one-level star frame 25 the central shaft gear is arranged; 23, three secondary planetary gears 23 of a secondary planetary gear respectively are installed on three secondary planetary gear axles on the medial surface of secondary star frame 22 to be meshed with the central shaft gear of one-level star frame 25, to be meshed with the internal tooth of ring gear 24 simultaneously; 22 lateral surface centers of secondary star frame are key axle 21, i.e. the output shaft of this planet gear train.
This routine wheelchair driving wheel is a trailing wheel 6, and the key axle 21 of planetary gearsets is connected with the wheel hub 61 of trailing wheel 6 through clutch 5.Clutch 5 is an axle sleeve, and the keyway of its inner ring surface matches with key axle 21, and the two is for movingly, and there is double wedge the outer face of clutch 5; Matching with the groove on wheel hub 61 inner faces, is annular slot on clutch 5 outer ring surfaces, and shift fork 3 is the shape of falling Y, is driving lever on it; The bottom connects 2 pusher dogs, and pusher dog is stuck in the annular slot of clutch 5, when shift fork 3 swings; Its pusher dog is stirred clutch 5 and on key axle 21, is slided, and outside clutch 5, moves, its double wedge and wheel hub 61 engagement, and the power of motor output drives wheel hub 61 rotations through the planetary gearsets back of slowing down; Shift fork 3 is stirred and moved, breaks away from wheel hub 61 in the clutch 5, and the wheelchair driving wheel separates with motor, and is available manual.
The driving lever of shift fork 3 upper end joins with rotating shaft 31, rotating shaft 31 for level and be in 21 vertical on key axle on, be fixed in wheelchair frame 4 rotationally; Rotating shaft 31 1 ends are equipped with clutch handle 32; Rotate clutch handle 32, rotating shaft 31 coaxial rotation, shift fork 3 swings that it connect.
The foregoing description is merely concrete example of purpose, technical scheme and beneficial effect further explain to this utility model, and this utility model is not to be defined in this.All any modifications of within the scope of disclosure of this utility model, being made, be equal to replacement, improvement etc., all be included within the protection domain of this utility model.
Claims (6)
1. the power drive system of electric wheelchair; Comprise direct current generator (1) and drive mechanism (2); Said direct current generator (1) is fixedly installed in wheelchair frame (4); Motor is connected with controlling organization, and controlling organization has the current of electric adjustment module of regulating motor supply current, control motor speed, it is characterized in that:
Said motor output shaft connects the two-stage planet group, and the output shaft of the planetary gearsets after the deceleration is connected with the wheel hub (61) of the driving wheel of wheelchair;
Fixing output gear on the motor output shaft; On three primary planet pinion axles on the medial surface of one-level star frame (25) primary planet pinion (26) is installed respectively; Ring gear (24) has the internal tooth that matches with primary planet pinion (26), is fixedly installed in the transmission shell (41), and three primary planet pinions (26) are meshed with the output gear of motor, are meshed with the internal tooth of ring gear (24) simultaneously; On the lateral surface of one-level star frame (25) the central shaft gear is arranged; On three secondary planetary gear axles on the medial surface of secondary star frame (22) secondary planetary gear (23) is installed respectively, three secondary planetary gears (23) are meshed with the central shaft gear of one-level star frame (25), are meshed with the internal tooth of ring gear (24) simultaneously; (22) lateral surface center of secondary star frame is key axle (21), the i.e. output shaft of this planet gear train;
Said transmission shell (41) is fixedly connected with wheelchair frame (4).
2. the power drive system of electric wheelchair according to claim 1 is characterized in that:
Said direct current generator (1) is a brshless DC motor.
3. the power drive system of electric wheelchair according to claim 1 and 2 is characterized in that:
The key axle (21) of said planetary gearsets is connected with the wheel hub (61) of driving wheel (6) through clutch (5); Clutch (5) is an axle sleeve, and the keyway of its inner ring surface matches with key axle (21), and the two is for movingly, and there is double wedge the outer face of clutch (5), matches with groove on wheel hub (61) inner face; On clutch (5) outer ring surface is annular slot, and shift fork (3) is the shape of falling Y, is driving lever on it; The bottom connects 2 pusher dogs; Pusher dog is stuck in the annular slot of clutch (5), and when the driving lever swing, shift fork (3) is stirred clutch (5) and gone up slip at key axle (21); Outside clutch (5), move, its double wedge and wheel hub (61) engagement; The power of motor output drives wheel hub (61) and rotates after planetary gearsets is slowed down, shift fork (3) is stirred and moved, breaks away from wheel hub (61) in the clutch (5), and the wheelchair driving wheel separates with motor.
4. the power drive system of electric wheelchair according to claim 3 is characterized in that:
The driving lever upper end of said shift fork (3) joins with rotating shaft (31); Rotating shaft (31) for level and be in vertical of key axle (21) on; Wheelchair frame (4) is fixed in rotating shaft (31) rotationally, and rotating shaft (31) one ends are equipped with clutch handle (32).
5. the power drive system of electric wheelchair according to claim 1 and 2 is characterized in that:
Said key axle (21) axle head is installed on wheel hub (61) through hub bearing (611), also has at least 1 bearing (211) to be installed on transmission shell (41) or wheelchair frame (4) on the key axle (21).
6. the power drive system of electric wheelchair according to claim 5 is characterized in that:
Said key axle (21) axle head is rotatably installed on wheel hub (61) through hub bearing (611), and key axle (21) axle head has spacing draw-in groove, and spacing card (612) inlay card is in spacing draw-in groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204345972U CN202458985U (en) | 2011-11-05 | 2011-11-05 | Power transmission system of electric wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204345972U CN202458985U (en) | 2011-11-05 | 2011-11-05 | Power transmission system of electric wheelchair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202458985U true CN202458985U (en) | 2012-10-03 |
Family
ID=46907192
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204345972U Expired - Fee Related CN202458985U (en) | 2011-11-05 | 2011-11-05 | Power transmission system of electric wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202458985U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499831A (en) * | 2011-11-05 | 2012-06-20 | 陈戈平 | Power transmission system for electric wheelchair |
| CN103312084A (en) * | 2013-06-03 | 2013-09-18 | 常熟市平方轮椅有限公司 | Direct-current brushless driving wheel structure of electric wheelchair |
-
2011
- 2011-11-05 CN CN2011204345972U patent/CN202458985U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499831A (en) * | 2011-11-05 | 2012-06-20 | 陈戈平 | Power transmission system for electric wheelchair |
| CN103312084A (en) * | 2013-06-03 | 2013-09-18 | 常熟市平方轮椅有限公司 | Direct-current brushless driving wheel structure of electric wheelchair |
| CN103312084B (en) * | 2013-06-03 | 2015-05-20 | 常熟市平方轮椅有限公司 | Direct-current brushless driving wheel structure of electric wheelchair |
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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: 20121003 Termination date: 20151105 |
|
| EXPY | Termination of patent right or utility model |