CN202510683U - Two-gear variable speed shaft for electric vehicle - Google Patents
Two-gear variable speed shaft for electric vehicle Download PDFInfo
- Publication number
- CN202510683U CN202510683U CN2012201370977U CN201220137097U CN202510683U CN 202510683 U CN202510683 U CN 202510683U CN 2012201370977 U CN2012201370977 U CN 2012201370977U CN 201220137097 U CN201220137097 U CN 201220137097U CN 202510683 U CN202510683 U CN 202510683U
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- gear
- retaining
- shaft
- power transmission
- transmission shaft
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Abstract
The utility model discloses a two-gear variable speed shaft for an electric vehicle. The two-gear shaft for the electric vehicle comprises a power transmission shaft, a first gear wheel gear and a second gear wheel gear, wherein an isolator structure is formed between the first gear wheel gear and the power transmission shaft, and comprises a first gear spline sleeve, a plurality of first gear rolling friction bodies and first gear elastic elements. A controllable overrunning coupler structure is formed between the second gear wheel gear and the power transmission shaft, and comprises a second gear spline sleeve, a control drive plate, a plurality of second gear rolling friction bodies and second gear elastic elements. The control drive plate is connected with a control mechanism and is sleeved on an exterior of the power transmission shaft in a hollow mode. One end of the first spline sleeve extends out and forms a first gear shaft neck and the first gear wheel gear is connected with the first gear shaft neck in a coaxial rotating mode through a sliding bearing. One end of the second spline sleeve extends out and forms a second gear shaft neck and the second gear wheel gear is connected with the second gear shaft neck in a coaxial rotating mode through a sliding bearing. The control mechanism is in friction connection with the control drive plate through the steel ball. The two-gear variable speed shaft for the electric vehicle has the advantages of long service life of the power transmission shaft, strong bearing capacity, fast shifting response and broad range of application.
Description
Technical field
The utility model relates to a kind of variable-speed shaft assembly, particularly a kind of two retaining variable-speed shafts that are used for two-wheeled or three-wheeled electric vehicle that utilize free wheel device.
Background technique
Two retaining speed changes of two-wheeled or three-wheeled electric vehicle normally realize like this; On output shaft, be rotatably connected to two retaining speed change driven gears through bearing; Two retaining driven gears are respectively with driving gear is corresponding often meshes on the driving shaft; First speed driven gear is through one-way element or claim that common free wheel device is connected with output shaft; Two retaining driven gears are connected with output shaft through controllable overrunning clutch, and the control panel of controllable overrunning clutch is connected with control mechanism, and the star-wheel of one-way element or controllable overrunning clutch rotates through spline linkage structure and output shaft synchronously.Low speed driving or the start up period, a retaining driven gear drives the output shaft one-way synchronization and rotates, two retaining driven gears and output shaft are in and surmount state; When needs were run at high speed, control mechanism made two retaining driven gears drive output shafts and rotates with higher rotating speed one-way synchronization by same sense of rotation, and a retaining driven gear rotating speed is lower than the output shaft rotating speed and is in output shaft and surmounts state.One-way element is that two working curved surfaces in opposite directions with several circumference uniform distribution wedge shape spaces are set on the side in opposite directions of a retaining driven gear and a retaining spline housing; The rolling friction body of roller, needle roller or steel ball is set in wedge shape space; The rolling friction body is connected with elastic element; One retaining driven gear is when pressing the direction initialization rotation, and the elastic force of elastic element makes rolling friction body and two working curved surface formation friction coupled condition in opposite directions.Controllable overrunning clutch is two working curved surfaces in opposite directions that setting has several circumference uniform distribution wedge shape spaces on the side in opposite directions of two retaining spline housings and two retaining driven gears; The rolling friction body of roller, needle roller or steel ball is set in wedge shape space; Several rolling friction bodies are connected with the control dial; It is that the circumferential small angle in the center of circle rotates with the output shaft axis that the control dial drives several rolling friction bodies under external force so that rolling friction body and two in opposite directions working curved surface form the coupled condition that rubs; The control dial is connected with elastic element, and the elastic force of elastic element makes friction piece disengaging and the two friction coupled condition of working curved surface in opposite directions when no external force.The utility model patent that the applicant once applied for a kind of controllable overrunning clutch on May 3rd, 2011, and obtained patent right on October 5th, 2011.This patent No. is ZL201120136250.X; Its name is called controllable overrunning clutch; This controllable overrunning clutch is made up of controllable overrunning clutch main body and control mechanism; The controllable overrunning clutch main body is made up of driving disc, driven disc, frictional engagement body, shift fork dish, resilient member; Its control mechanism forms friction and is connected through stirring between element and the shift fork dish so that shift fork dribbling kinetic friction combination rotates and with driving disc and driven disc between form friction and be connected, thereby realization driving disc and driven disc rotate synchronously.When this clutch is used for two retaining speed changes of two-wheeled or three-wheeled electric vehicle, driving disc is designed to gear and forms two retaining driven gears.But the retaining of one in one-way element in aforementioned all structures or controllable overrunning clutch or controllable overrunning clutch main body driven gear, two retaining driven gears or driving disc all are to be rotatably connected on the output shaft through coaxial bearing, and a retaining spline housing, two retaining spline housings or driven disc all are to be connected on the output shaft through spline is coaxial.Because it is bigger that spline connection precision is influenced by part processing precision, assembly precision; Therefore; Cause one-way element or free wheel device two in opposite directions the practical center position of working surface do not overlap and misplace, bring in a plurality of friction pieces one or more can not with two in opposite directions working surface form friction and be connected, tend to cause the friction piece overwork that is in the friction coupled condition and early fatigue destruction occurs; Influence one-way element or free wheel device working life, thereby influence the working life of variable-speed shaft.For this reason, need further to improve.
Summary of the invention
The purpose of the utility model is exactly the deficiency to existing technology, and a kind of electric vehicle two retaining variable-speed shafts of long service life are provided.
For realizing above-mentioned purpose, the utility model adopts following technological scheme.
A kind of electric vehicle two retaining variable-speed shafts; Comprise power transmission shaft, first gear, second gear; Be formed with the one-way element structure that comprises a retaining spline housing, an a plurality of retaining rolling friction body and a retaining elastic element between first gear and the power transmission shaft, first gear is formed with on the working curved surface in opposite directions with two of a retaining spline housing and holds also a plurality of one to one with it wedge shape spaces of a said retaining rolling friction body; Said second gear and power transmission shaft are formed with the controllable overrunning clutch structure that comprises two retaining spline housings, control dial, several two retaining rolling friction bodies and two retaining elastic elements; The control dial is connected with control mechanism; Control dial sky is enclosed within the power transmission shaft outside; Being formed with between the working curved surface in opposite directions of second gear and two retaining spline housings held said two retaining rolling friction bodies and several wedge slots one to one with it, and a said retaining spline housing one end is extended with a gear shaft neck; Said first gear through a gear shaft hold coaxial rotation be connected said one the retaining spline housing a gear shaft neck on; Said two retaining spline housings, one end is extended with two gear shaft necks; Said second gear through two gear shafts hold coaxial rotation be connected said two the retaining spline housings two gear shaft necks on.
Adopt the utility model of aforementioned techniques scheme; Because first gear is with second gear holds through a gear shaft or two gear shafts hold the corresponding retaining spline housing or two that is rotationally connected respectively and keep off on the spline housings; The integrating error that spline connects have been overcome; Can effectively improve form on each key of flower cover and the respective gears two coaxalitys of working curved surface in opposite directions, a plurality of rolling friction bodies can be worked simultaneously, divide equally load; Avoided causing the early fatigue of rolling friction body to destroy, thereby effectively prolonged the working life of variable-speed shaft because of load is uneven.The variable-speed shaft of present technique scheme can be used as driven shaft; Also can be used as driving shaft uses; When using as driven shaft, first gear or second gear drive power transmission shaft through one-way element or controllable overrunning clutch and rotate, when using as driving shaft; Power transmission shaft drives first gear through one-way element or controllable overrunning clutch or second gear rotates, and the power transmission shaft sense of rotation of two kinds of different user modes is opposite.
Optimized technical scheme, a said gear shaft hold in holding all with two gear shafts at least one be sliding bearing.So that compact structure, reduce the physical dimension of variable-speed shaft, reduce manufacture cost, improve the adaptability of mounting point; Simultaneously, improve bearing capacity, increase the service life.It both can be that one of them adopts sliding bearing structure, also can be that the two all adopts sliding bearing structure, was that the concrete structure size of variable-speed shaft is confirmed.
Optimized technical scheme; Said first gear is made up of gear body and connecting ring; Connecting ring is through on the end end face of bolt connection gear body; The gear body is forwarded through a gear shaft and is automatically connected on the said retaining spline housing, and the connecting ring ring set is outside at a retaining spline housing, is evenly equipped with the multistage cam working face on the inner side surface in opposite directions of a connecting ring and a retaining spline housing; Be connected with stamping forming guard shield through screw on the other end of connecting ring, guard shield is fixedly connected a said retaining elastic element that is made up of spring sheet on the end face of gear body; A said retaining spline housing and connecting ring outer side surface in opposite directions are column working, and the column working of a retaining spline housing and the multistage cam working face of connecting ring form said a plurality of wedge shape space; Said several retaining rolling friction bodies are distributed in the said a plurality of wedge shape spaces between guard shield and the gear body forward surface, and the elastic force of spring sheet is pushed a retaining rolling friction body to the narrow section of wedge shape space.The spline housing outer side surface is made as the cylndrical surface and cam working face is not set; Can avoid changing the defective that exists stress concentrated greatly because of the spline housing thickness that camming surface causes is set on the spline housing; Thereby prolong spline housing working life, its beneficial effect has more meaning for the bigger retaining speed changing structure of load; The cam ring working surface is set on the connecting ring, and its cam ring working surface can be processed into straight-through form, has improved the convenience of processing.Adopt the structure of cam ring working surface in addition, can effectively increase the area of cam working face, be beneficial to the life-span and increase working load that prolong cam working face, same, its beneficial effect has more meaning for the bigger retaining speed changing structure of loading.Guard shield adopts the impact briquetting mode to process, and is beneficial to the reduction manufacture cost.
Optimized technical scheme; Said control mechanism comprises steel ball, push rod, elastomer, and push rod and elastomer are located in the blind hole that the power transmission shaft respective ends is provided with, elastomer be connected at the bottom of the blind hole hole with the push rod end face on; The push rod outer end can be stretched out outside the blind hole; Push rod and blind hole are slidingly matched, and the push rod middle part is provided with conical surface, and the conical surface small end is towards elastomer; The blind hole hole wall of said power transmission shaft is provided with at least one cross-perforating; Said steel ball can stretch out a part from cross-perforating and be connected with the empty inwall contact of the control dial of said controllable overrunning clutch structure formation friction.When variable-speed shaft need be transformed into two retaining rotating speeds as the driven shaft use; The first gear diameter is greater than second gear; Add the axial force of direction pushing push rod at the bottom of the blind hole hole in the push rod outer end; Elastic force direction at the bottom of the hole that push rod overcomes compresses elastomeric moves, the conical surface of push rod from cross-perforating stretch out stretch out a part at least after, form friction with the contact of the control dial mesopore inwall of said controllable overrunning clutch structure and be connected; The control dial forms low-angle relatively rotating with said second gear after the elastic force that overcomes two retaining elastic elements under the surface friction drag effect; And synchronous several of control dial two retaining rolling friction bodies towards second gear and two retaining spline housings two in opposite directions the narrow section of the wedge slot between the working curved surface move, until two retaining rolling friction bodies and second gear and two retaining spline housings two in opposite directions the working curved surface contact form to rub and be connected, two keep off the synchronous rotation of spline housings and second gear; Second gear drives power transmission shaft and rotates, and realizes the purpose of two retaining speed changes.At this moment, a retaining spline housing and power transmission shaft also are in synchronous rotary state, and identical with a retaining rotary speed direction, and its rotating speed is higher than the first gear rotating speed, and therefore, a retaining spline housing and first gear are in and surmount disengaged position.When needs recover a retaining rotating speed; Remove external force; Push rod moves outside under elastomeric resilient force, and steel ball loses radially after the pushing force can not form resistance to the control dial, resets under the resilient force of control dial two retaining elastic elements; And drive two narrow sections of wedge slot between the working curved surface in opposite directions that several two retainings rolling friction bodies break away from second gears and two retaining spline housings, thereby the friction coupled condition that disengagement and second gear and two keep off spline housings.When variable-speed shaft uses as driving shaft and need be transformed into two retaining rotating speeds the time, the first gear diameter is less than second gear, the power transmission shaft backward rotation, and power transmission shaft drives one grade of gear through one-way element or free wheel device or intermediate gear rotates.Its variable speed operation process and aforementioned same content, in the rate conversion process or after the speed change completion, along with the rotating speed increase of driven shaft, the first gear rotating speed is greater than the power transmission shaft rotating speed as driving shaft, and first gear and power transmission shaft form and surmount state.The control mechanism of present technique scheme adopts steel ball to promote, and is simple in structure, speed of response is fast, and speed change is quick, and control is reliable, long service life.
Further optimized technical scheme also is provided with slick and sly groove on the mesopore inwall of said control dial, and slick and sly groove and said cross-perforating position adapt.Steel ball can go deep into slick and sly groove, and formation stops to the control dial, the gearshift reliability further is provided and increases the service life.
Optimized technical scheme further, said elastomer is a pressure spring.
The utility model beneficial effect compared with prior art is, long service life, the bearing capacity of power transmission shaft are strong, and the gearshift speed of response is fast, and using scope is wide.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the A-A sectional view among the utility model Fig. 1.
B among Fig. 3 the utility model Fig. 1-B sectional view.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described, but therefore the utility model is not limited among the described scope of embodiments.
Referring to Fig. 1, Fig. 2, Fig. 3; A kind of electric vehicle two retaining variable-speed shafts; Comprise power transmission shaft 1, first gear 2, second gear 3; Be formed with the one-way element structures that comprise a retaining spline housing 4, most one retaining rolling friction bodies 7 and a retaining elastic element 11 between first gear 2 and the power transmission shaft 1, two of first gear 2 and a retaining spline housing 4 is formed with on the working curved surface in opposite directions and holds also a plurality of one to one with it wedge shape spaces of a said retaining rolling friction body 7; Said second gear 3 and power transmission shaft 1 are formed with 12 the controllable overrunning clutch structure that comprises two retaining spline housings 5, control dial 6, several two retainings rolling friction bodies 8 and two retaining elastic elements; Control dial 6 is connected with control mechanism; Control dial 6 skies are enclosed within power transmission shaft 1 outside; Being formed with between the working curved surface in opposite directions of second gear 3 and two retaining spline housings 5 held said two retaining rolling friction bodies (8) and several wedge slots one to one with it, and a said retaining spline housing 4 one ends are extended with a gear shaft neck 41; Said first gear 2 through a gear shaft hold 9 coaxial rotation be connected said one the retaining spline housing 4 a gear shaft neck 41 on; Said two retaining spline housings, 5 one ends are extended with two gear shaft necks 51; Said second gear 3 through two gear shafts hold 10 coaxial rotation be connected said two the retaining spline housings 5 two gear shaft necks 51 on.
A said gear shaft holds 9 and two gear shafts and holds 10 and be sliding bearing.
Said first gear 2 is made up of gear body 21 and connecting ring 22; Connecting ring 22 is through on the end end face of bolt connection gear body 21; Gear body 21 holds 9 through a gear shaft and is rotatably connected on the said retaining spline housing 4; Connecting ring 22 ring sets are in a retaining spline housing 4 outsides; Be evenly equipped with the multistage cam working face on the inner side surface in opposite directions of a connecting ring 22 and a retaining spline housing 4, be connected with stamping forming guard shield 16 through screw on the other end of connecting ring 22, guard shield 16 is fixedly connected a said retaining elastic element 11 that is made up of spring sheet on the end face of gear body 21; A said retaining spline housing 4 is a column working with connecting ring 22 outer side surface in opposite directions, and the column working of a retaining spline housing 4 and the multistage cam working face of connecting ring 22 form said a plurality of wedge shape space; In said a plurality of wedge shape spaces that said several retaining rolling friction bodies 7 are distributed between guard shield 16 and gear body 21 forward surfaces, the elastic force of spring sheet 121 is pushed a retaining rolling friction body 7 to the narrow section of wedge shape space.
Said control mechanism comprises steel ball 13, push rod 14, elastomer 15; Push rod 14 is located among the blind hole 1a of power transmission shaft 1 respective ends setting with elastomer 15; Elastomer 15 is connected at the bottom of the blind hole 1a hole and on push rod 14 end faces, push rod 14 outer ends can be stretched out outside the blind hole 1a, and push rod 14 is slidingly matched with blind hole 1a; Push rod 14 middle parts are provided with conical surface 14a, and conical surface 14a small end is towards elastomer 15; The blind hole 1a hole wall of said power transmission shaft 1 is provided with a cross-perforating 1b; Said steel ball 13 can stretch out a part from cross-perforating 1b and be connected with the control dial 6 empty inwall contact formation frictions of said controllable overrunning clutch structure.
Also be provided with slick and sly groove 61 on the mesopore inwall of said control dial 6, slick and sly groove 61 adapts with said cross-perforating 1b position.Steel ball can go deep into 6 formation of 61 pairs of control dials of slick and sly groove to be stopped, the gearshift reliability further is provided and increases the service life.
Said elastomer 15 is a pressure spring.
Cross-perforating 1b in the present embodiment also can establish two or more, confirms according to the diameter of steel ball size and power transmission shaft correspondent section, is provided with two when above, is provided with by the circumference uniform distribution mode.
Gear shaft in the present embodiment holds one that 9 and two gear shafts hold in 10 also can adopt rolling bearing.Can reduce workpiece quantity and improve transmission efficiency.But the rolling bearing structure size is bigger, therefore, only under the situation that installing space allows, adopts.
Though more than combine accompanying drawing to describe the mode of execution of the utility model; But those of ordinary skill in the art also can recognize in the scope to accompanying claims and makes various variations or modification; As the wedge shape working surface of the push rod in the utility model is made the mode that ecto-entad increases gradually; Realize that through the pulling push rod clutch breaks away from the purpose that surmounts state, the interior edge face bottom of corresponding push rod can be provided with extension spring etc.It is within the scope and intention of the utility model that these modifications and variation are interpreted as.
Claims (6)
1. an electric vehicle two keeps off variable-speed shafts; Comprise power transmission shaft (1), first gear (2), second gear (3); Be formed with the one-way element structure that comprises a retaining spline housing (4), an a plurality of retaining rolling friction body (7) and a retaining elastic element (11) between first gear (2) and the power transmission shaft (1), first gear (2) is formed with on the working curved surface in opposite directions with two of a retaining spline housing (4) and holds also a plurality of one to one with it wedge shape spaces of a said retaining rolling friction body (7); Said second gear (3) is formed with the controllable overrunning clutch structure that comprises that two retaining spline housings (5), control dial (6), several two retaining rolling friction bodies (8) and two keep off (12) of elastic elements with power transmission shaft (1); Control dial (6) is connected with control mechanism; Control dial (6) sky is enclosed within power transmission shaft (1) outside; Being formed with between the working curved surface in opposite directions of second gear (3) and two retaining spline housings (5) held said two retaining rolling friction bodies (8) and several wedge slots one to one with it, and it is characterized in that: a said retaining spline housing (4) one ends are extended with a gear shaft neck (41); Said first gear (2) through a gear shaft hold (9) coaxial rotation be connected said one the retaining spline housing (4) a gear shaft neck (41) on; Said two retaining spline housings (5) one ends are extended with two gear shaft necks (51); Said second gear (3) through two gear shafts hold (10) coaxial rotation be connected said two the retaining spline housings (5) two gear shaft necks (51) on.
2. electric vehicle according to claim 1 two retaining variable-speed shafts is characterized in that: a said gear shaft hold that (9) and two gear shafts hold in (10) at least one be sliding bearing.
3. electric vehicle two retaining variable-speed shafts according to claim 1 and 2; It is characterized in that: said first gear (2) is made up of gear body (21) and connecting ring (22); Connecting ring (22) is through on the end end face of bolt connection gear body (21); Gear body (21) holds (9) through a gear shaft and is rotatably connected on the said retaining spline housing (4); Connecting ring (22) ring set is in retaining spline housing (a 4) outside; Be evenly equipped with the multistage cam working face on the inner side surface in opposite directions of a connecting ring (22) and a retaining spline housing (4), be connected with stamping forming guard shield (16) through screw on the other end of connecting ring (22), guard shield (16) is fixedly connected a said retaining elastic element (11) that is made up of spring sheet on the end face of gear body (21); A said retaining spline housing (4) is a column working with connecting ring (22) outer side surface in opposite directions, and the column working of a retaining spline housing (4) and the multistage cam working face of connecting ring (22) form said a plurality of wedge shape space; Said several retaining rolling friction bodies (7) are distributed in the said a plurality of wedge shape spaces between guard shield (16) and gear body (21) forward surface, and the elastic force of spring sheet (121) is pushed a retaining rolling friction body (7) to the narrow section of wedge shape space.
4. electric vehicle two retaining variable-speed shafts according to claim 1 and 2; It is characterized in that: said control mechanism comprises steel ball (13), push rod (14), elastomer (15); Push rod (14) and elastomer (15) are located in the blind hole (1a) of power transmission shaft (1) respective ends setting; Elastomer (15) is connected at the bottom of blind hole (1a) hole and on push rod (14) end face, push rod (14) outer end can be stretched out outside the blind hole (1a), and push rod (14) is slidingly matched with blind hole (1a); Push rod (14) middle part is provided with conical surface (14a), and conical surface (14a) small end is towards elastomer (15); Blind hole (1a) hole wall of said power transmission shaft (1) is provided with at least one cross-perforating (1b); Said steel ball (13) can stretch out a part from cross-perforating (1b) and be connected with the empty inwall contact of the control dial (6) of said controllable overrunning clutch structure formation friction.
5. electric vehicle two retaining variable-speed shafts according to claim 4, it is characterized in that: also be provided with slick and sly groove (61) on the mesopore inwall of said control dial (6), slick and sly groove (61) adapts with said cross-perforating (1b) position.
6. electric vehicle two retaining variable-speed shafts according to claim 4, it is characterized in that: said elastomer (15) is a pressure spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201370977U CN202510683U (en) | 2012-04-01 | 2012-04-01 | Two-gear variable speed shaft for electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201370977U CN202510683U (en) | 2012-04-01 | 2012-04-01 | Two-gear variable speed shaft for electric vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN202510683U true CN202510683U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201370977U Expired - Fee Related CN202510683U (en) | 2012-04-01 | 2012-04-01 | Two-gear variable speed shaft for electric vehicle |
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| Country | Link |
|---|---|
| CN (1) | CN202510683U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286377A (en) * | 2018-03-21 | 2018-07-17 | 深圳市方大自动化系统有限公司 | A kind of half high sliding door locking system |
-
2012
- 2012-04-01 CN CN2012201370977U patent/CN202510683U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108286377A (en) * | 2018-03-21 | 2018-07-17 | 深圳市方大自动化系统有限公司 | A kind of half high sliding door locking system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20160401 |