CN207975239U - Novel electric drives gearshift - Google Patents

Novel electric drives gearshift Download PDF

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Publication number
CN207975239U
CN207975239U CN201820281996.1U CN201820281996U CN207975239U CN 207975239 U CN207975239 U CN 207975239U CN 201820281996 U CN201820281996 U CN 201820281996U CN 207975239 U CN207975239 U CN 207975239U
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China
Prior art keywords
pin
disk
leading screw
motor
output
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CN201820281996.1U
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Chinese (zh)
Inventor
刘芳
邓高建
王健
葛海龙
孙东坡
庄震亚
陈飞
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SAIC Motor Corp Ltd
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SAIC Motor Corp Ltd
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Abstract

The utility model discloses a kind of Novel electric drive gearshift, ECU and Hall sensor are provided on motor, it is connected with planetary speed reducer with small tooth number difference on the output shaft of motor, leading screw is sequentially connected with planetary speed reducer with small tooth number difference and the both ends of leading screw are positioned at by rolling or sliding bearing on case of transmission, nut is driven with leading screw by slip screw, guiding axis is fixed on case of transmission, shift fork is fixedly connected with or is made of one structure with nut and coordinates with guiding axis simultaneously so that shift fork moves linearly along guiding axis, and guiding axis is parallel with leading screw.Using planetary speed reducer with small tooth number difference, primary speed-down can reach larger speed ratio, meet gear shifting force demand, transmission efficiency is small;Feed screw nut becomes rotary motion to move along a straight line, and movement conversion accuracy is high, and realizes reverse self-locking, effectively prevent off-gear;Motor is integrated with ECU, compact-sized, can feed back motor rotor position and shift fork position simultaneously with Hall sensor, eliminate traditional shift sensor.

Description

Novel electric drives gearshift
Technical field
The utility model is related to Technology of Automatic Transmission for vehicle fields, and gearshift is driven more particularly to a kind of Novel electric.
Background technology
With the development and popularization of new-energy automobile technology, two-speed automatic transmission applies more and more, this kind of speed changer Only need the switching of realization low gear, high gear, neutral gear, it is desirable that gearshift response is rapid, simple in structure, reliable operation.Traditional AMT, DCT speed changer are due to that will convert more gear, and usually using gear shift mechanism, this kind of mechanism is more complicated, be not suitable for In two-gear transmission.
Current two-speed automatic transmission is usually using fluid pressure type and mechanism of electromechanical shifter.Fluid pressure type gearshift passes through Hydraulic Cylinder shift fork realizes shift, but hydraulic system is more complicated and of high cost.Mechanism of electromechanical shifter is usually using electricity Machine driving, worm and gear or multiple stage gear reduction, cam mechanism or reversal means device realize conversion of the rotary motion to linear motion, To realize gearshift function, this kind of gearshift number of parts is more, complicated, assembly is difficult.
Utility model content
The utility model is in view of the problems of the existing technology and insufficient, provides a kind of Novel electric drive gearshift, has It executes high, compact-sized, the easy assembly of precision, respond sensitive, reliable operation technical advantage.
The utility model is to solve above-mentioned technical problem by following technical proposals:
The utility model provides a kind of Novel electric drive gearshift, and feature is comprising a motor, a few teeth difference row Star retarder, a nut, a leading screw, a guiding axis, a shift fork and a case of transmission are provided with ECU and Hall on the motor Sensor is connected with the planetary speed reducer with small tooth number difference on the output shaft of the motor, which passes with the planetary speed reducer with small tooth number difference The both ends of dynamic connection and the leading screw are positioned at by rolling or sliding bearing on the case of transmission, which passes through with the leading screw Slip screw is driven, which is fixed on the case of transmission, which is fixedly connected with or is made of one knot with the nut Structure coordinates simultaneously with the guiding axis so that the shift fork moves linearly along the guiding axis, and the guiding axis is parallel with the leading screw.
Preferably, the planetary speed reducer with small tooth number difference include eccentric shaft, balance weight, planetary gear, ring gear, reducer shell and Output device, one end of the eccentric shaft are sequentially connected or are made of one with the output shaft of the motor, which is fixed on this partially In mandrel, which is positioned at by bearing on the other end of the eccentric shaft, which is fixed on the reducer shell, The planetary gear and the ring gear are meshed, which is driven with planetary gear cooperation and is positioned at the retarder by bearing On shell.
Preferably, the output device is pin type output mechanism, which is included in the planetary gear upper edge The pin hole of N number of a diameter of d, output shaft disk are evenly equipped on the circumference of diameter D, the diametrically circumference of D on the output shaft disk On be evenly equipped with the guide for being cased with that outer diameter is ds on the axis pin and each axis pin of N number of a diameter of d ', those pin holes and those axis pins It corresponds, is respectively inserted in corresponding pin hole with the axis pin of the guide.
Preferably, the output device is floating disc type output mechanism, which includes two fixed pins, floats Disk and output shaft, two fixed pins are mounted on the planetary gear, and also there are two straight pin, the floating discs for arrangement on the output shaft On open there are four groove respectively on two fixed pins and the output shaft two straight pins cooperation.
Preferably, guide is arranged between the fixed pin and corresponding groove, also set between the straight pin and corresponding groove Set guide.
Preferably, the output device is cross slider type output mechanism, which includes that input is justified Disk, floating disk and output disk, respectively there are one rectangular boss for the floating disk both sides, and the rectangular boss of both sides is orthogonal, And by the center of the floating disk, two rectangular boss on the floating disk are respectively embedded into the input disk and output circle In the groove of disk.
On the basis of common knowledge of the art, above-mentioned each optimum condition, can arbitrarily combine to get the utility model respectively compared with Good example.
The positive effect of the utility model is:
(1) planetary speed reducer with small tooth number difference, primary speed-down is used to can reach larger speed ratio, meet gear shifting force demand, and It is transmission efficiency, small.
(2) rotary motion is changed into linear motion using feed screw nut, movement conversion accuracy is high, and passes through helical angle Design realize reverse self-locking (linear motion of nut can not be changed into the rotary motion of leading screw), off-gear can be effectively prevent, province Traditional lock catch device is removed.
(3) use motor and controller collection integral, it is compact-sized, versatile, and carrying Hall sensor can be with Motor rotor position and shift fork position are fed back simultaneously, eliminates traditional shift sensor.
(4) it uses motor highly integrated with planetary speed reducer with small tooth number difference, eliminates electric motor end cap and reducer shell end cap, It effectively shortens axial length, realizes the technique effect compact-sized, space is small, power density is high.
Description of the drawings
Fig. 1 is that the Novel electric of the utility model preferred embodiment drives the structural schematic diagram of gearshift.
Fig. 2 is that the Novel electric of the utility model preferred embodiment drives the control principle drawing of gearshift.
Fig. 3 is the structural schematic diagram of the pin type output mechanism of the utility model preferred embodiment.
Fig. 4 is the structural schematic diagram of the floating disc type output mechanism of the utility model preferred embodiment.
Fig. 5 is the structural schematic diagram of the cross slider type output mechanism of the utility model preferred embodiment.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Based on the implementation in the utility model Example, the every other embodiment that those of ordinary skill in the art are obtained without making creative work all belong to In the range of the utility model protection.
As shown in Figure 1, the present embodiment provides a kind of Novel electrics to drive gearshift comprising a motor 2, a fewer differential teeth planetary Retarder, a nut 6, a leading screw 7, a guiding axis 8, a shift fork 9 and a case of transmission 10 connect on the output shaft of the motor 2 It is connected to the planetary speed reducer with small tooth number difference, which is sequentially connected with the planetary speed reducer with small tooth number difference and the both ends of the leading screw 7 pass through It rolls or sliding bearing is positioned on the case of transmission 10, which is driven with the leading screw 7 by slip screw, the guiding Axis 8 is fixed on the case of transmission 10, the shift fork 9 and the nut 6 be fixedly connected or be made of one structure simultaneously with the guiding Axis 8 coordinates so that the shift fork 9 moves linearly along the guiding axis 8, and the guiding axis 8 is parallel with the leading screw 7.
As shown in Figure 1, the planetary speed reducer with small tooth number difference includes eccentric shaft 13, balance weight 12, planetary gear 11, ring gear 4, subtracts Fast device shell 3 and output device 5, one end of the eccentric shaft 13 and the output shaft of the motor 2 are sequentially connected or are made of one, this is flat Weighing apparatus block 12 is fixed on the eccentric shaft 13, which is positioned at by bearing on the other end of the eccentric shaft 13, the internal tooth Circle 4 is fixed on the reducer shell 3, and the planetary gear 11 and the ring gear 4 are meshed, the output device 5 and the planetary gear 11 Cooperation is driven and is positioned on the reducer shell 3 by bearing.In fact, realizing that sliding or rolling are matched by geometry designs It closes, to which the rotation of planetary gear to be transmitted on output device;The rotation of planetary gear be it is eccentric, the purpose of output device be by Eccentricity is eliminated, to realize that dead axle exports.
Wherein, output device 5 can be pin type output mechanism, floating disc type output mechanism, cross slider type output mechanism. The little tooth difference speed reducer is compact-sized, transmission efficiency, and primary speed-down can reach larger speed ratio, completes reduction of speed torque and makees With.
As shown in Figure 1, being provided with ECU (shift motor controller) 1 and Hall sensor 14 on motor 2;ECU 1 can drive Dynamic motor rotates forward, inverts, stops operating, and the shift for receiving host controller is asked, the gear of feedback monitoring to upper control Device;Hall sensor 14 can monitor the position of output axle of motor 2 in real time, and obtain the position of shift fork by conversion.
As shown in Figure 1, shift fork 9 is fixedly connected with or is made of one structure with nut 6, while coordinating with guiding axis 8, to limit The circumferencial direction degree of freedom of nut 6 is made;7 both ends of leading screw are positioned at by rolling or sliding bearing on case of transmission 10, and Limit the axial freedom of leading screw.
As shown in Figure 1, the worm drive of leading screw 7 and nut 6, are accurately converted to rotary motion linear motion, and And the angle that leading screw 7 rotates is linearly related with the linear movement distance of nut 6, is beneficial to the ride comfort of shift;Pass through helical angle Reverse self-locking may be implemented in adjustment, i.e. the rotation of leading screw 7 can drive nut 6 to move linearly, and the linear movement of nut 6 cannot It is converted into the rotary motion of leading screw 7, this self-locking function can effectively prevent out of supply.
As shown in Fig. 2, host controller sends shifting commands to shift motor controller 1, shift motor controller 1 drives Motor 2 acts, and little tooth difference speed reducer device completes the effect of reduction of speed torque, and rotary motion is converted to the straight of nut 6 by 7 nut 6 of leading screw Line moves, since shift fork 9 is fixedly connected with nut 6, so shift fork 9 follows 6 synchronizing moving of nut.Hall sensor 14 can be real When monitor the rotating speed of 2 rotor of motor, and the angle that turns over is recorded, so as to calculate the rotating speed of few teeth difference output shaft and turn over Angle, nut 6 and shift fork 9 speed and distance that move.These information are fed back to shift motor control by Hall sensor 14 Device 1 reaches higher control accuracy to realize closed-loop control.
As shown in figure 3, the pin type output mechanism, N number of diameter diametrically is evenly equipped on the circumference of D on planetary gear 11 For the pin hole of d, the axis pin 16 of N number of a diameter of d ' is diametrically evenly equipped on the circumference of D on output shaft disk 15, is cased on axis pin Outer diameter is the guide 17 of ds, is respectively inserted in N number of pin hole of planetary gear with the axis pin 16 of guide 17.Little tooth difference speed reducer it is inclined The eccentricity of mandrel is a, as d=ds+2a, it is ensured that guide 17 is kept in contact with pin hole to passing power.
As shown in figure 4, the floating disc output mechanism, including fixed pin 18, floating disc 19, output shaft 20;Two solid Rationed marketing 18 is mounted on planetary gear 11, and also arrangement opens that there are four grooves there are two straight pin 21 on floating disc on output shaft 20 Coordinate respectively with the circumference pin 21 on fixed pin 18 and output shaft 20.When output mechanism operates, four pins are in floating disc 19 Groove in slide;As an optimization, guide 22 can be set between pin and groove, rolling is changed into sliding friction and is rubbed It wipes, reduces friction loss.
As shown in figure 5, the cross slider type output mechanism, including input disk 23, floating disk 24, output disk 25;Respectively there are one rectangular boss for 24 both sides of floating disk, and the boss of both sides is orthogonal, and passes through the center of floating disk 24; Two boss on floating disk 24 are respectively embedded into the groove of input disk 23 and output disk 25;When output mechanism operates When, floating disk 24 slides in the groove of input disk 23 and output disk 25.
The course of work of the gearshift is:When ECU 1 is connected to the shifting commands of host controller, driving motor 2 Forward or reverse, eccentric shaft 13 and the output shaft synchronous of motor 2 rotate;Little tooth difference speed reducer completes the effect of reduction of speed torque, and leads to Crossing output device 5 drives leading screw 7 to rotate;Nut 6 is since the limitation of shift fork 9 can not rotate, to move linearly along leading screw 7;It dials Fork 7 moves linearly, to realize gear shifting action under the promotion of nut 6 along guiding axis 8.
In shift process, Hall sensor 14 monitors the output shaft turned position of motor 2 in real time, is dialled by conversion The position of fork, when shift fork is moved to specified gear, controller 1 controls motor 2 and stops operating.It is reversed due to feed screw nut Self-locking, after motor 2 stops operating, what shift fork can consolidate rests on designated position and the influence that is not hit.
Although the foregoing describe specific embodiment of the present utility model, it will be appreciated by those of skill in the art that These are merely examples, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art Member can make these embodiments numerous variations or repair under the premise of without departing substantially from the principles of the present invention and essence Change, but these change and modification each fall within the scope of protection of the utility model.

Claims (6)

1. a kind of Novel electric drives gearshift, which is characterized in that it includes a motor, a planetary speed reducer with small tooth number difference, a deceleration Device shell, a nut, a leading screw, a guiding axis, a shift fork and a case of transmission, ECU is provided on the motor and Hall passes Sensor is connected with the planetary speed reducer with small tooth number difference on the output shaft of the motor, which is driven with the planetary speed reducer with small tooth number difference The both ends of connection and the leading screw are positioned at by rolling or sliding bearing on the case of transmission, which passes through cunning with the leading screw Dynamic worm drive, the guiding axis are fixed on the case of transmission, which is fixedly connected with or is made of one structure with the nut Coordinate with the guiding axis simultaneously so that the shift fork moves linearly along the guiding axis, the guiding axis is parallel with the leading screw.
2. Novel electric as described in claim 1 drives gearshift, which is characterized in that the planetary speed reducer with small tooth number difference includes bias Axis, balance weight, planetary gear, ring gear, reducer shell and output device, one end of the eccentric shaft are passed with the output shaft of the motor Dynamic connection is made of one, which is fixed on the eccentric shaft, which is positioned at the another of the eccentric shaft by bearing On one end, which is fixed on the reducer shell, and the planetary gear and the ring gear are meshed, the output device and the row Meshing engagement is driven and is positioned on the reducer shell by bearing.
3. Novel electric as claimed in claim 2 drives gearshift, which is characterized in that the output device is that pin type exports machine Structure, the pin type output mechanism include the pin hole for being diametrically evenly equipped with N number of a diameter of d on the circumference of D on the planetary gear, output Axis disk is diametrically evenly equipped on axis pin and each axis pin of N number of a diameter of d ' on the circumference of D on the output shaft disk It is cased with the guide that outer diameter is ds, those pin holes and those axis pins correspond, and correspondence is respectively inserted in the axis pin of the guide Pin hole in.
4. Novel electric as claimed in claim 2 drives gearshift, which is characterized in that the output device is floating mould core machine Structure, the floating disc type output mechanism include two fixed pins, floating disc and output shaft, which is mounted on the planetary gear On, on the output shaft also arrangement there are two straight pin, opened on the floating disc there are four groove respectively with two fixed pins and this Two straight pins cooperation on output shaft.
5. Novel electric as claimed in claim 4 drives gearshift, which is characterized in that set between the fixed pin and corresponding groove Guide is set, guide is also provided between the straight pin and corresponding groove.
6. Novel electric as claimed in claim 2 drives gearshift, which is characterized in that the output device exports for cross slider type Mechanism, which, which includes input disk, floating disk and output disk, the floating disk both sides, respectively one The rectangular boss of a rectangular boss, both sides is orthogonal, and by the center of the floating disk, two squares on the floating disk Shape boss is respectively embedded into the groove of the input disk and the output disk.
CN201820281996.1U 2018-02-28 2018-02-28 Novel electric drives gearshift Active CN207975239U (en)

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Application Number Priority Date Filing Date Title
CN201820281996.1U CN207975239U (en) 2018-02-28 2018-02-28 Novel electric drives gearshift

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Application Number Priority Date Filing Date Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109163088A (en) * 2018-10-29 2019-01-08 宁波上中下自动变速器有限公司 A kind of speed changer is electronic to select gear change system and automobile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109163088A (en) * 2018-10-29 2019-01-08 宁波上中下自动变速器有限公司 A kind of speed changer is electronic to select gear change system and automobile

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