CN210371891U - Two-gear transmission based on pure electric vehicle - Google Patents

Abstract

The utility model discloses a two grades of derailleurs based on pure electric vehicles, by the subassembly of shifting gears, the intermediate shaft subassembly, the input shaft subassembly, output gear, the differential mechanism casing, the parking ratchet, bolt and parking subassembly constitute, the subassembly of shifting gears changes intermediate shaft subassembly's output, input shaft subassembly drive intermediate shaft subassembly, output gear is driven by the intermediate shaft subassembly, differential mechanism transmits the moment of torsion of equidimension not for different wheels, the parking ratchet is by bolt fixed connection on output gear, start parking subassembly block parking ratchet, realize the braking to output gear, avoid arranging the parking ratchet in intermediate shaft subassembly intensive space all around, thereby obtain the axial length that reduces the derailleur, be favorable to whole effect of arranging.

Description

Two-gear transmission based on pure electric vehicle

Technical Field

The utility model relates to an electric automobile technical field especially relates to a two grades of derailleurs based on pure electric vehicles.

Background

The pure electric automobile is a clean energy automobile, and along with the vigorous advocation of energy conservation and emission reduction, the pure electric automobile becomes a big development trend, and the electric automobile needs a parking system to satisfy the needs of automobile parking, but the brake ratchet of the existing electric automobile is arranged on a middle shaft on a gearbox, gears and synchronizers are arranged at the position of the middle shaft, so that the problem that the axial length of a transmission is increased, and the whole arrangement is not facilitated is solved.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a two grades of derailleurs based on pure electric vehicles aims at solving the ratchet overall arrangement among the prior art and has increased the axial length of derailleur, is unfavorable for the problem of whole arrangement.

In order to achieve the purpose, the utility model adopts a two-gear transmission based on a pure electric vehicle, the two-gear transmission comprises a gear shifting assembly, a middle shaft assembly, an input shaft assembly, an output gear, a differential shell, a parking ratchet wheel, a bolt and a parking assembly, the middle shaft assembly is clamped with the gear shifting assembly, the input shaft assembly is in transmission connection with the middle shaft, the output gear is externally engaged with the intermediate shaft assembly, the differential case is internally engaged with the output gear, the parking ratchet wheel is fixedly connected with the differential shell, a fixing hole is arranged on the side surface of the output gear, the side surface of the parking ratchet wheel is provided with a matching hole, the bolt is in interference fit with the parking ratchet wheel, and with output gear interference fit, just the bolt passes the mating holes, and penetrate the fixed orifices, the parking subassembly with the parking ratchet block.

Wherein an outer circumference of the parking ratchet wheel is outside an outer circumference of the output gear.

The parking assembly comprises a pawl, a claw pin, a spring, a cam, a toothed bar, a worm wheel, a worm and a motor, one end of the pawl is clamped with the parking ratchet wheel and is located on the outer side of the pawl, the claw pin is connected with the other end of the pawl in a rotating mode, one end of the spring is fixedly connected with the claw pin, the other end of the spring is fixedly connected with the pawl, the cam is far away from the pawl, one end of the claw pin is abutted to the end of the pawl and is located on one side, away from the parking ratchet wheel, of the pawl, the toothed bar is in interference fit with the cam, the worm wheel is in transmission connection with the toothed bar, the worm is in transmission connection with the worm wheel, and the motor is fixedly connected with the worm.

Wherein, the last recess that has of parking ratchet, the recess is located on parking ratchet's the outer circumference, the pawl includes ring section and lug, the one end of ring section with cam pawl round pin rotates to be connected, the lug with the other end integrated into one piece of ring section is located the ring section orientation one side of parking ratchet, and the card is gone into the recess.

One side of the annular section, which faces the cam, is provided with a sliding groove, and the cam is abutted against the annular section and is positioned in the sliding groove.

Wherein, the intermediate shaft subassembly includes intermediate shaft body, one-level driven gear, second grade driven gear and synchronous ware, the intermediate shaft body with output gear external toothing, one-level driven gear with intermediate shaft body bearing is connected, and is located the outside of intermediate shaft body, second grade driven gear with intermediate shaft body bearing is connected, and is located the outside of intermediate shaft body, the synchronous ware with intermediate shaft body fixed connection, and be located one-level driven gear with between the second grade driven gear, and with the subassembly block of shifting.

The input shaft assembly comprises a first driving gear, a second driving gear and an input shaft body, the first driving gear is externally meshed with the first driven gear, the second driving gear is externally meshed with the second driven gear, and the input shaft body is fixedly connected with the first driving gear and the second driving gear.

The gear shifting assembly comprises a gear shifting fork, a gear shifting shaft, a worm wheel shaft, a second worm and a gear shifting motor, the gear shifting fork is clamped with the synchronizer, the gear shifting shaft is in sliding connection with the gear shifting fork, the worm wheel shaft is externally meshed with the gear shifting shaft, the second worm is rotatably connected with the worm wheel shaft, and the gear shifting motor is fixedly connected with the second worm.

Wherein, the synchronizer includes tooth hub, pillar, sleeve and synchronizer ring, the tooth hub with middle axis body fixed connection, and be located the outside of middle axis body, the scarce groove has on the surface of tooth hub, the pillar with tooth hub sliding connection, and be located lack the inslot, the sleeve with pillar sliding connection, and be located the outside of tooth hub, and with shift and pull out the fork block, synchronizer ring's quantity is two, two synchronizer ring with tooth hub transmission is connected, and with tooth hub sliding connection, and with the pillar is contradicted, two synchronizer ring's slip direction moves towards respectively one-level driven gear and second grade driven gear.

Wherein, the pillar includes rectangular plate and trapezoidal plate, the rectangular plate with tooth hub sliding connection, and be located lack the inslot, trapezoidal plate with rectangular plate integrated into one piece, and be located the rectangular plate is kept away from one side of tooth hub, and with the sleeve is contradicted, the longest axis of trapezoidal plate with the axis of middle axis body is perpendicular.

The utility model discloses a two grades of derailleurs based on pure electric vehicles, through constituting by gear shifting assembly, intermediate shaft subassembly, input shaft subassembly, output gear, differential mechanism casing, parking ratchet, bolt and parking subassembly, the gear shifting assembly changes the output of intermediate shaft subassembly, the drive of input shaft subassembly the intermediate shaft subassembly, output gear quilt the drive of intermediate shaft subassembly drives differential mechanism action transmits the moment of torsion of equidimension not for different wheels, the parking ratchet quilt bolt fixed connection be in on the output gear, start parking subassembly block the parking ratchet realizes the braking to output gear, avoids arranging in intermediate shaft subassembly intensive space all around the parking ratchet to obtain the axial length that reduces the derailleur, be favorable to whole effect of arranging.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a two-speed transmission according to the present invention;

fig. 2 is a schematic structural view of the shift assembly of the present invention;

FIG. 3 is a schematic structural view of the parking module of the present invention;

fig. 4 is a connection diagram of the parking pawl and the output gear of the present invention;

fig. 5 is a schematic structural view of the pawl of the present invention;

fig. 6 is a schematic structural diagram of the synchronizer according to the present invention;

fig. 7 is a schematic structural view of the gear hub of the present invention;

fig. 8 is a schematic structural view of the hub and the support column of the present invention.

In the figure: 100-two-gear transmission, 10-gear shifting assembly, 11-gear shifting fork, 12-gear shifting shaft, 13-worm wheel shaft, 14-second worm, 15-gear shifting motor, 20-middle shaft assembly, 21-middle shaft assembly, 22-primary driven gear, 23-secondary driven gear, 24-synchronizer, 241-gear hub, 2411-notch, 242-pillar, 2421-rectangular plate, 2422-trapezoidal plate, 243-sleeve, 244-synchronous ring, 30-input shaft assembly, 31-primary driving gear, 32-secondary driving gear, 33-input shaft assembly, 40-output gear, 41-fixed hole, 50-differential shell, 60-parking ratchet, 61-matching hole, 62-groove, 70-bolt, 80-parking component, 81-pawl, 811-ring segment, 8111-sliding groove, 812-lug, 82-claw pin, 83-spring, 84-cam, 85-toothed bar, 86-worm wheel, 87-worm and 88-motor.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In addition, in the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

Referring to fig. 1 to 8, the present invention provides a two-gear transmission based on a pure electric vehicle, where the two-gear transmission 100 includes a shift assembly 10, an intermediate shaft assembly 20, an input shaft assembly 30, an output gear 40, a differential housing 50, a parking ratchet 60, a bolt 70, and a parking assembly 80, the intermediate shaft assembly 20 is engaged with the shift assembly 10, the input shaft assembly 30 is in transmission connection with the intermediate shaft, the output gear 40 is externally engaged with the intermediate shaft assembly 20, the differential housing 50 is internally engaged with the output gear 40, the parking ratchet 60 is fixedly connected with the differential housing 50, a fixing hole 41 is provided on a side surface of the output gear 40, a mating hole 61 is provided on a side surface of the parking ratchet 60, the bolt 70 is in interference fit with the parking ratchet 60 and is in interference fit with the output gear 40, and the bolt 70 passes through the fitting hole 61 and passes through the fixing hole 41, and the parking assembly 80 is engaged with the parking ratchet 60.

In a conventional transmission with only one reduction gear, a parking ratchet wheel 60 is generally arranged on an input shaft assembly 30, the input shaft assembly 30 is directly connected with an automobile engine, if the transmission is not in gear engagement and is in a neutral state, the braking and non-braking effects on the input shaft assembly 30 are consistent, gears on an intermediate shaft assembly 20 are in an idle state, and therefore if the parking ratchet wheel 60 is arranged on the output shaft assembly 30, the braking effect can be achieved when a gear is engaged, but if the gear is engaged for a long time, the gear is engaged with the gears on the input shaft assembly 30 to be braked, and the service life of the transmission is shortened; thus, the parking ratchet 60 can only be arranged on the intermediate shaft assembly 20 or the output gear 40; however, the arrangement of the countershaft assembly 20 with the gears and synchronizers 24, 60 on the countershaft assembly 20 will further increase the axial length of the transmission. The utility model discloses an in the embodiment, will parking ratchet 60 arranges on output gear 40, through bolt 70 simultaneously with parking ratchet 60 and parking subassembly 80 interference fit, with parking ratchet 60 fixed connection on parking subassembly 80, parking ratchet 60 just does not contact with differential casing 50, then has obtained the axial length who reduces the derailleur, is favorable to the effect of whole arranging.

Further, the outer circumference of the parking ratchet 60 is outside the outer circumference of the output gear 40. In the embodiment of the present invention, when the parking assembly 80 acts on the parking ratchet 60, the occurrence of gear rattling phenomenon with the output gear 40 can be avoided.

Further, the parking assembly 80 includes a pawl 81, a pawl pin 82, a spring 83, a cam 84, a rack 85, a worm wheel 86, a worm 87 and a motor 88, one end of the pawl 81 is engaged with the parking ratchet 60 and located outside the pawl 81, the pawl pin 82 is rotatably connected with the other end of the pawl 81, one end of the spring 83 is fixedly connected with the pawl pin 82, the other end of the spring 83 is fixedly connected with the pawl 81, the cam 84 abuts against one end of the pawl 81 far from the pawl pin 82 and is located on one side of the pawl 81 far from the parking ratchet 60, the rack 85 is in interference fit with the cam 84, the worm wheel 86 is in transmission connection with the rack 85, the worm 87 is in transmission connection with the worm wheel 86, and the motor 88 is fixedly connected with the worm 87. In the embodiment, the motor 88 rotates to drive the worm 87 welded thereto to rotate, the worm wheel 86 is driven by the worm 87, the axis of the worm wheel 86 is perpendicular to the axis of the worm 87, the rack 85 is driven by the worm wheel 86 to drive the cam 84 in clearance fit therewith to rotate, the long radius of the cam 84 abuts against the pawl 81 to push one end of the pawl 81 close to the cam 84 to rotate towards the parking ratchet 60, the other end of the pawl 81 rotates around the pawl 82, the pawl 82 is fixed on the transmission case until the pawl 81 is pushed by the long radius of the cam 84 to be engaged with the parking ratchet 60, so as to brake the parking ratchet 60, when the braking state needs to be released, only the reverse rotation of the motor 88 needs to be realized, and the pawl is reset by the spring 83, thereby obtaining the effect of automatic braking.

Further, the parking ratchet wheel 60 is provided with a groove 62, the groove 62 is located on the outer circumference of the parking ratchet wheel 60, the pawl 81 includes an annular section 811 and a convex block 812, one end of the annular section 811 is rotationally connected with the claw pin 82 of the cam 84, the convex block 812 is integrally formed with the other end of the annular section 811, and is located at one side of the annular section 811 facing the parking ratchet wheel 60, and is clamped into the groove 62. In the embodiment of the present invention, the annular section 811 drives the protrusion 812 to rotate toward the parking ratchet 60, and the width of the groove 62 is the same as the width of the protrusion 812, so as to ensure that the protrusion 812 can be clamped into the groove 62, thereby implementing braking of the parking ratchet 60.

Further, a side of the annular section 811 facing the cam 84 is provided with a sliding groove 8111, and the cam 84 abuts against the annular section 811 and is located in the sliding groove 8111. In the embodiment of the present invention, the width of the sliding groove 8111 is equal to the width of the cam 84, so that the cam 84 can be restrained by the inner side wall of the sliding groove 8111 to generate an excessive relative sliding when abutting against the annular section 811.

Further, the intermediate shaft assembly 20 includes an intermediate shaft body 21, a primary driven gear 22, a secondary driven gear 23 and a synchronizer 24, the intermediate shaft body 21 is externally engaged with the output gear 40, the primary driven gear 22 is bearing-connected with the intermediate shaft body 21 and located outside the intermediate shaft body 21, the secondary driven gear 23 is bearing-connected with the intermediate shaft body 21 and located outside the intermediate shaft body 21, and the synchronizer 24 is fixedly connected with the intermediate shaft body 21, located between the primary driven gear 22 and the secondary driven gear 23 and engaged with the shift assembly 10; input shaft assembly 30 includes one-level driving gear 31, second grade driving gear 32 and input axis body 33, one-level driving gear 31 with one-level driven gear 22 external toothing, second grade driving gear 32 with second grade driven gear 23 external toothing, input axis body 33 with one-level driving gear 31 with second grade driving gear 32 fixed connection.

In the present embodiment, the input shaft 33 is in transmission connection with an output shaft of an automobile engine, and transmits a rotational torque to the primary driving gear 31 and the secondary driving gear 32, the primary driving gear 31 is externally engaged with the primary driven gear 22 to transmit a torque to the primary driven gear 22, and at the same time, the secondary driving gear is externally engaged with the secondary driven gear 23 to transmit a torque to the secondary driven gear 23, and both the primary driven gear 22 and the secondary driven gear 23 are in bearing connection with the intermediate shaft 21, and in a neutral state, both the primary driven gear 22 and the secondary driven gear 23 are idle relative to the intermediate shaft 21 without transmitting a torque until the synchronizer 24 is driven by the shift assembly 10 to perform a shift in and a shift out operation, and is connected to the primary driven gear 22 or the secondary driven gear 23, the transmission ratio between the first-stage driven gear 22 and the first-stage driving gear 31 is different from the transmission ratio between the second-stage driven gear 23 and the second-stage driving gear 32, and after the synchronizer 24 is connected, the torques output to the intermediate shaft body 21 are different, so that two different output rates are obtained.

Further, the shift assembly 10 includes a shift fork 11, a shift shaft 12, a worm wheel shaft 13, a second worm 14 and a shift motor 15, wherein the shift fork 11 is engaged with the synchronizer 24, the shift shaft 12 is slidably connected with the shift fork 11, the worm wheel shaft 13 is externally engaged with the shift shaft 12, the second worm 14 is rotatably connected with the worm wheel shaft 13, and the shift motor 15 is fixedly connected with the second worm 14. In the embodiment of the present invention, the shift motor 15 is rotated, the motor 88 rotates to drive the second worm 14 to rotate, the second worm 14 rotates to drive the worm-gear shaft 13 to rotate, the worm-gear shaft 13 drives the shift fork 11 to move along the axial direction of the shift shaft 12, the connection between the turbine shaft and the shift fork 11 is connected by a sector gear, so as to fix the sliding distance of the shift fork 11, and the shift fork 11 shifts the synchronizer 24, so as to obtain the effect of realizing the automatic shift and downshift of the synchronizer 24.

Further, the synchronizer 24 includes a gear hub 241, a support column 242, a sleeve 243 and a synchronizing ring 244, the gear hub 241 is fixedly connected to the middle shaft body 21 and located outside the middle shaft body 21, the outer surface of the gear hub 241 has a slot 2411, the support column 242 is slidably connected to the gear hub 241 and located inside the slot 2411, the sleeve 243 is slidably connected to the support column 242 and located outside the gear hub 241 and engaged with the shift fork 11, the number of the synchronizing rings 244 is two, the two synchronizing rings 244 are in transmission connection with the gear hub 241 and slidably connected to the gear hub 241 and abutted against the support column 242, and the sliding directions of the two synchronizing rings 244 respectively face the primary driven gear 22 and the secondary driven gear 23. In the embodiment, the sleeve 243 is slid along the axial direction of the intermediate shaft body 21 by the shift fork 11, the strut 242 is pushed, the strut 242 pushes the synchronizing ring 244 to move toward the primary driven gear 22 or the secondary driven gear 23, the synchronizing ring 244 engages with the hub 241 until the synchronizing ring 244 engages with the primary driven gear 22 or the secondary driven gear 23, the torque of the primary driven gear 22 or the secondary driven gear 23 idling relative to the intermediate shaft body 21 is transmitted to the synchronizing ring 244, then transmitted to the hub 241, and finally transmitted to the intermediate shaft body 21, and the pushed synchronizing ring 244 is different from the pushed synchronizing ring 244, and finally the gear engaged therewith is different, thereby realizing the shifting function.

Further, the strut 242 includes a rectangular plate 2421 and a trapezoidal plate 2422, the rectangular plate 2421 is slidably connected to the gear hub 241 and is located in the slot 2411, the trapezoidal plate 2422 is integrally formed with the rectangular plate 2421 and is located on one side of the rectangular plate 2421 away from the gear hub 241 and is abutted against the sleeve 243, and the longest axis of the trapezoidal plate 2422 is perpendicular to the axis of the middle shaft body 21. In the embodiment, the rectangular plate 2421 serves to connect the hub gear 241 and the synchronizing ring 244 and push the synchronizing ring 244, the upper surface of the trapezoidal plate 2422 is located outside the outer surface of the hub gear 241, and the longest axis of the trapezoidal plate 2422 is perpendicular to the axis of the intermediate shaft body 21, thereby obtaining an effect of preventing the trapezoidal plate 2422 from being engaged with the sleeve 243.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. The utility model provides a two grades of derailleurs based on pure electric vehicles which characterized in that:

including shift assembly, jackshaft subassembly, input shaft subassembly, output gear, differential mechanism casing, parking ratchet, bolt and parking subassembly, the jackshaft subassembly with shift assembly block, the input shaft subassembly with jackshaft transmission connects, output gear with jackshaft subassembly external toothing, the differential mechanism casing with the output gear internal meshing, parking ratchet with differential mechanism casing fixed connection, the fixed orifices has on output gear's the side, the mating holes has on parking ratchet's the side, the bolt with parking ratchet interference fit, and with output gear interference fit, just the bolt passes the mating holes, and penetrate the fixed orifices, the parking subassembly with parking ratchet block.

2. The two speed transmission of claim 1, wherein:

the outer circumference of the parking ratchet wheel is outside the outer circumference of the output gear.

3. The two speed transmission of claim 2, wherein: the parking subassembly includes pawl, claw pin, spring, cam, ratch, worm wheel, worm and motor, the one end of pawl with the parking ratchet block, and be located the outside of pawl, the claw pin with the other end of pawl rotates to be connected, the one end of spring with claw pin fixed connection, the other end of spring with pawl fixed connection, the cam with the pawl is kept away from the one end of claw pin is supported and is held, and is located the pawl is kept away from one side of parking ratchet, the ratch with cam interference fit, the worm wheel with the ratch transmission is connected, the worm with worm wheel transmission is connected, the motor with worm fixed connection.

4. The two speed transmission of claim 3, wherein: the last recess that has of parking ratchet, the recess is located on parking ratchet's the outer circumference, the pawl includes ring section and lug, the one end of ring section with cam pawl round pin rotates to be connected, the lug with the other end integrated into one piece of ring section, and be located the ring section orientation one side of parking ratchet, and the card is gone into the recess.

5. The two speed transmission of claim 4, wherein: one side of the annular section, which faces the cam, is provided with a sliding groove, and the cam is abutted against the annular section and is positioned in the sliding groove.

6. The two speed transmission of claim 1, wherein: the intermediate shaft assembly comprises an intermediate shaft body, a primary driven gear, a secondary driven gear and a synchronizer, the intermediate shaft body is externally meshed with the output gear, the primary driven gear is connected with a bearing of the intermediate shaft body and is positioned on the outer side of the intermediate shaft body, the secondary driven gear is connected with a bearing of the intermediate shaft body and is positioned on the outer side of the intermediate shaft body, and the synchronizer is fixedly connected with the intermediate shaft body, is positioned between the primary driven gear and the secondary driven gear and is clamped with the gear shifting assembly.

7. The two speed transmission of claim 6, wherein: the input shaft assembly comprises a first-stage driving gear, a second-stage driving gear and an input shaft body, the first-stage driving gear is externally meshed with the first-stage driven gear, the second-stage driving gear is externally meshed with the second-stage driven gear, and the input shaft body is fixedly connected with the first-stage driving gear and the second-stage driving gear.

8. The two speed transmission of claim 6, wherein: the gear shifting assembly comprises a gear shifting fork, a gear shifting shaft, a worm wheel shaft, a second worm and a gear shifting motor, the gear shifting fork is clamped with the synchronizer, the gear shifting shaft is in sliding connection with the gear shifting fork, the worm wheel shaft is externally meshed with the gear shifting shaft, the second worm is rotatably connected with the worm wheel shaft, and the gear shifting motor is fixedly connected with the second worm.

9. The two speed transmission of claim 8, wherein: synchronizer includes tooth hub, pillar, sleeve and synchronizer ring, the tooth hub with middle axis body fixed connection, and be located the outside of middle axis body, the scarce groove has on the surface of tooth hub, the pillar with tooth hub sliding connection, and be located lack the inslot, the sleeve with pillar sliding connection, and be located the outside of tooth hub, and with shift and pull out the fork block, synchronizer ring's quantity is two, two synchronizer ring with tooth hub transmission is connected, and with tooth hub sliding connection, and with the pillar is contradicted, two synchronizer ring's slip direction moves towards respectively one-level driven gear and second grade driven gear.

10. The two speed transmission of claim 9, wherein: the pillar includes rectangular plate and trapezoidal plate, the rectangular plate with tooth hub sliding connection, and be located lack the inslot, trapezoidal plate with rectangular plate integrated into one piece, and be located the rectangular plate is kept away from one side of tooth hub, and with the sleeve is contradicted, the longest axis of trapezoidal plate with the axis of middle axis body is perpendicular.

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