CN217804295U - Drive arrangement, transaxle and vehicle - Google Patents

Abstract

The application relates to the technical field of driving devices, and particularly provides a driving device, a drive axle and a vehicle, wherein the driving device comprises a motor body; the transmission comprises a transmission body, a first gear transmission assembly, a second gear transmission assembly and a gear shifting component for shifting transmission gears; the casing divide into the motor chamber that holds motor body and the variable speed chamber that holds the derailleur body through the baffle of shell intracavity. The application provides a drive arrangement of integrated form, compact structure, the integrated level is high, can improve the flexibility of arranging on equipment to all improve in aspects such as reducing weight, reducing spare part quantity, having gear switching function, improve performance.

Description

Drive arrangement, transaxle and vehicle

Technical Field

The application relates to the technical field of driving devices, in particular to a driving device, a drive axle and a vehicle.

Background

At present, a drive axle on a vehicle, such as a commercial vehicle electric drive axle, is mainly split in a motor and a gearbox, occupies a large space and is low in integration level. Limited by the size of the vehicle, the motor and the gearbox occupy a large space, which results in a small gap between the brake and the drive, and is not beneficial to arrangement, and meanwhile, the problems of heavy weight, more parts and the like exist. And the gearbox is usually internally provided with only one-stage or two-stage reduction gear sets, so that the output gear can not be switched, and the integral use performance needs to be improved.

SUMMERY OF THE UTILITY MODEL

In view of this, embodiments of the present disclosure are directed to providing an integrated driving device, which has a compact structure and a high integration level, can improve flexibility of arrangement on a device, and can improve usability in terms of reducing weight, reducing the number of parts, having a shift switching function, and the like.

The application provides a driving device, which comprises a motor body; the transmission comprises a transmission body, a first gear transmission assembly, a second gear transmission assembly and a gear shifting component for shifting transmission gears; the shell is divided into a motor cavity for accommodating the motor body and a speed change cavity for accommodating the speed changer body through a partition plate in the shell cavity.

In one possible embodiment, the housing comprises: the shell body is provided with a first opening on one side and a second opening on the other side, and the shell body and the partition plate are in an integrated structure; a first end cap covering the first opening; and the second end cover covers the second opening.

In a possible embodiment, the output shaft of the motor body and the input shaft of the transmission body are integrated to form an integrated shaft, and the partition plate has a through hole for the integrated shaft to pass through.

In a possible embodiment, a first bearing and an oil seal are arranged in the through hole, and the oil seal seals a gap between the through hole and the integrated shaft; one end of the integrated shaft is rotatably connected with the cavity wall, far away from the partition plate, of the motor cavity through a second bearing, and the other end of the integrated shaft is rotatably connected with the cavity wall, far away from the partition plate, of the variable speed cavity through a third bearing.

In a possible embodiment, a differential is further disposed in the speed change chamber, the differential is fixedly connected to an output gear of the transmission, and two half-shaft gears of the differential form an output of the drive device.

In a possible implementation manner, the first-gear transmission assembly comprises a first-gear driving gear fixed on the integrated shaft and a first-gear driven gear sleeved on the intermediate shaft of the transmission, the second-gear transmission assembly comprises a second-gear driving gear fixed on the integrated shaft and a second-gear driven gear sleeved on the intermediate shaft, the gear shifting component is sleeved on the intermediate shaft and is positioned between the first-gear driven gear and the second-gear driven gear, and shaft teeth of the intermediate shaft are meshed with the output gear; outer gear teeth are arranged on a shell of the differential, and form the output gear; or the output gear is sleeved and fixedly connected on the shell of the differential mechanism; and two ends of the differential are rotatably connected to the wall of the speed change cavity.

In one possible embodiment, the shifting element is a shift sleeve.

In a possible implementation mode, the differential mechanism further comprises an inter-wheel differential lock for locking a rotating shaft of the differential mechanism, and a cylinder of the inter-wheel differential lock drives a shifting fork and a sliding meshing sleeve to move and mesh with the rotating shaft of the transmission.

The application also provides a drive axle comprising the drive device as in any one of the above.

The application also provides a vehicle comprising the drive axle.

According to the drive arrangement that this application provided, motor body and derailleur body integration are in a casing, unite two into one with the rear end cap of motor output side and the front end cap of derailleur input side in other words, make motor and derailleur sharing casing, the setting of common shell, so can reduce holistic horizontal size, do benefit to and arrange, improve the flexibility that the installation was arranged. When the driving device is arranged on the drive axle, the operability is improved for reducing the transverse size of the cantilever part of the drive axle, meanwhile, the whole weight is reduced due to the reduction of parts, and the gear switching component part is arranged in the transmission body, so that the gear switching can be carried out, the output power can be adjusted, and the service performance of the driving device is improved from multiple aspects.

Drawings

FIG. 1 is a cross-sectional view of a drive assembly in an embodiment of the present application;

FIG. 2 is a schematic view of a drive axle;

fig. 3 shows a schematic view of the shifting elements.

In fig. 1-3:

1. a housing; 11. a housing body; 12. a first end cap; 13. a second end cap; 14. a partition plate; 2. a motor body; 21. a motor stator; 22. a second bearing; 3. an integral shaft; 31. a first bearing; 32. oil sealing; 4. a transmission body; 41. an intermediate shaft; 42. a first gear driving gear; 43. a first-gear driven gear; 431. the gear shifting external teeth of the first-gear driven gear; 44. a shift sleeve; 441. an inner ring sleeve; 442. an outer ring sleeve; 45. a second gear driving gear; 46. a second driven gear; 461. gear shifting external teeth of a secondary driven gear; 47. an output gear; 5. a differential mechanism; 51. a differential housing; 6. an inter-wheel differential lock; 61. a cylinder; 62. a shifting fork; 63. sliding the engaging sleeve; 7. a shifting fork; 20. a motor; 30. a transmission.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.

Referring to fig. 1 to fig. 3, an embodiment of the present application provides a driving apparatus, which includes a motor body 2, a transmission body 4 and a casing 1, where it should be noted that the motor body 2 refers to a set of components of the motor, which can implement a motor function, other than an outer casing, for example, a set of components of a motor stator 21, a motor rotor and a motor shaft, that is, a portion of the motor, which is outside the outer casing, and may also be understood as a motor 20 including a motor outer casing and a motor body 2; the transmission body 4 refers to a set of other constituent components of the transmission than the case, that is, a portion of the transmission other than the case, which can perform a transmission function, and it can be understood that the transmission 30 includes the transmission case and the transmission body 4.

In this embodiment, drive arrangement only has a casing 1, and motor body 2 and derailleur body 4 are integrated in this same casing 1, and the shell intracavity of casing 1 is provided with baffle 14, and baffle 14 divide into motor chamber and variable speed chamber with the shell chamber, and motor body 2 sets up in the motor chamber, and derailleur body 4 sets up in the variable speed intracavity, promptly, and the chamber wall in motor chamber forms motor housing, and the chamber wall in variable speed chamber forms derailleur housing. Also, as shown in fig. 2, the partition 14 forms an end cover of a transmission end of the motor, a portion of the case 1 on a first side (right side in the drawing) of the partition 14 and the partition 14 together form a housing of the motor 20, and at the same time, the partition 14 also forms an end cover of a transmission end of the transmission, and a portion of the case 1 on a second side (left side in the drawing) of the partition 14 and the partition 14 together form a housing of the transmission 30.

Meanwhile, in the driving device of the embodiment, the transmission body 4 includes an input shaft, an intermediate shaft 41, an output gear 47, a first gear transmission assembly, a second gear transmission assembly and a shifting component for shifting transmission gears, and the transmission has two-gear transmission, so that the transmission ratio can be switched and the output power can be switched.

With the arrangement, on one hand, the motor body 2 and the transmission body 4 are integrated in the shell 1, which is equivalent to the common shell 1 and the common shell arrangement of the motor 20 and the transmission 30, and the motor and the transmission have compact structures, so that the overall transverse size of the driving device can be reduced, the installation and the arrangement are facilitated, and the arrangement flexibility is improved; when the driving device is arranged on the drive axle, the operability is improved for reducing the transverse size of the cantilever part of the drive axle; meanwhile, the parts of the driving device are reduced, the weight is reduced, and the cost is reduced and the service performance is improved; on the other hand, the transmission is internally provided with components for realizing gear switching, so that the gear switching can be realized, the driving device has two-gear power output, the use is more flexible, and the use performance of the driving device is improved. Therefore, the driving device provided by the embodiment has the advantages of compact structure, high integration level, flexible arrangement, two-gear power output, capability of switching output gears, more flexible use and higher use performance.

Casing 1 is including shell body 11, first end cover 12 and second end cover 13, on one side of shell body 11, the motor chamber, set up the first opening that power supply machine body 2 put into the motor chamber to close through first end cover 12 lid, be equivalent to, first end cover 12 forms the front end housing of motor. On the opposite side of shell body 11, the variable speed chamber, be provided with the second opening that supplies derailleur body 4 to put into the variable speed chamber, the second opening closes through second end cover 13 lid, and second end cover 13 forms the rear end cap of derailleur, is equivalent to, and casing 1 includes shell body 11, motor front end housing and derailleur rear end cap.

The shell body 11 and the partition 14 are formed integrally.

Furthermore, the output shaft of the motor body 2 and the input shaft of the transmission body 4 are of an integrated structure to form an integrated shaft 3, one end of the integrated shaft 3 is located in the motor cavity to form the motor output shaft, the other end of the integrated shaft is located in the transmission cavity to form the transmission input shaft, and a through hole for the integrated shaft 3 to pass through is formed in the partition plate 14. So set up, motor shaft and the input shaft integrated into one piece, the integral type preparation of derailleur both improve the axiality, also cancelled the adapting unit that spline etc. carried out the connection, reduced the connecting piece, also avoided the junction wearing and tearing and leaded to influencing the problem in drive arrangement life-span, and no spline meshing noise when axle corotation and reversal improves the silence effect.

A first bearing 31 and an oil seal 32 are arranged in a through hole in the partition plate 14, the integrated shaft 3 penetrates into an inner ring of the first bearing 31, and the oil seal 32 seals a gap between the integrated shaft 3 and the through hole, so that a motor cavity and a speed change cavity are sealed. So, on the shell department that shares of derailleur body 4 and motor body 2 is baffle 14, set up a set of bearing and sealed can, compare in split type motor and gearbox and need two at least oil blanket 32 and two bearings, compact structure reduces spare part quantity and junction, reduces weight, reduce cost.

One end of the integrated shaft 3 is rotatably connected with the cavity wall of the motor cavity far away from the partition plate 14, namely the first end cover 12, through a second bearing 22, and the other end is rotatably connected with the cavity wall of the speed change cavity far away from the partition plate 14 through a third bearing. Two ends of the integrated shaft 3 are respectively fixed on two ends of the shell 1, no unnecessary space is left in the shell cavity, and the structure is compact and reasonable.

The transmission body 4 comprises an intermediate shaft 41 and an output gear 47, the integral shaft 3 is arranged in parallel with the intermediate shaft 41, and two ends of the intermediate shaft 41 are both rotatably connected to two opposite cavity walls of a speed changing cavity. The integrated shaft 3 transmits power to the intermediate shaft 41 through the first gear transmission assembly or the second gear transmission assembly to drive the intermediate shaft 41 to rotate; the intermediate shaft 41 is provided with shaft teeth, and the shaft teeth are meshed with the output gear 47, so that the intermediate shaft 41 drives the output gear 47 to rotate to output power.

Specifically, the first gear transmission assembly includes a first gear driving gear 42 fixed on the integrated shaft 3 and a first gear driven gear 43 sleeved on the intermediate shaft 41, the first gear driving gear 42 and the first gear driven gear 43 are engaged with each other (fig. 1 is a step-shaped cross-sectional view, the engagement between the first gear driving gear 42 and the first gear driven gear 43 is not shown in the figure due to the problem of the cutting angle, but it can be understood that the two gears are actually in an engaged state), the second gear transmission assembly includes a second gear driving gear 45 fixedly connected on the integrated shaft 3 and a second gear driven gear 46 sleeved on the intermediate shaft 41, and the second gear driving gear 45 and the second gear driven gear 46 are engaged with each other. The first-gear driven gear 43 and the second-gear driven gear 46 are both sleeved and connected with the intermediate shaft 41 through bearings. When the shaft 3 rotates and drives the first gear driving gear 42 and the second gear driving gear 45 to rotate, the first gear driven gear 43 and the second gear driven gear 46 rotate along with the first gear driving gear and the second gear driving gear, but due to the action of the bearing, the intermediate shaft cannot rotate along with the two driven gears when the shifting part is not acted.

And the shifting element is engaged with the intermediate shaft 41 between the first-gear driven gear 43 and the second-gear driven gear 46. The shifting element is connected to a shifter external to the transmission, such as a fork 7, for example, a sleeve of the fork 7 is fitted over the shifting element to push the shifting element or an outer sleeve of the shifting element to move axially left and right (the fork does not rotate with the shifting element), so that the shifting element is selectively engaged with the first driven gear 43 or the second driven gear 46.

In one embodiment, the shift member is a shift sleeve 44. The gear shifting is smoother. Of course, in other embodiments, the shifting element may also be a shifting synchronizing gear.

The following describes the shifting process in detail, taking the shift sleeve 44 as an example. As shown with reference to fig. 3.

Specifically, the shift joint sleeve 44 is located between the first-gear driven gear 43 and the second-gear driven gear 46, the shift joint sleeve 44 includes an inner ring sleeve 441 and an outer ring sleeve 442, the inner ring sleeve 441 has inner teeth and outer teeth, the outer ring sleeve 442 has inner teeth, the inner ring sleeve 441 is sleeved on the intermediate shaft 41, is engaged with the intermediate shaft 41, and is fixedly connected with the intermediate shaft 41, the outer ring sleeve 442 is sleeved outside the inner ring sleeve 441, the inner teeth are engaged with the outer teeth of the inner ring sleeve 441, and meanwhile, the outer ring sleeve 442 is slidable relative to the inner ring sleeve 441 in the axial direction. The outer ring 442 is sleeved with a shift fork 7, and the shift fork 7 pushes the outer ring 442 to move. When the outer ring 442 is pushed by the shift fork 7 and is displaced axially to one side, part of the internal teeth of the outer ring 442 are engaged with the external shifting teeth 431 and 461 of the first-gear driven gear and the second-gear driven gear, that is, one axial end of the outer ring 442 is engaged with the inner ring 441 and the other axial end is engaged with the first-gear driven gear 43 and the second-gear driven gear 46.

When the outer ring sleeve 442 is meshed with the first-gear driven gear 43 and the shifting joint sleeve 44 is meshed with the first-gear driven gear 43 and the intermediate shaft 41 at the same time, the first-gear driven gear 43 is meshed with the intermediate shaft 41, the first-gear driven gear 43 rotates to drive the intermediate shaft 41 to rotate through the shifting joint sleeve 44, and the intermediate shaft 41 outputs first-gear power; when the outer ring 442 is engaged with the second-gear driven gear 46, the intermediate shaft 41 rotates with the second-gear driven gear 46 to output second-gear power. So set up, the derailleur has two grades of power take offs, and only includes two pivot, an output gear 47 and four drive gears, and the part is few and compact structure.

As shown in fig. 1, a differential 5 is further disposed in the transmission cavity of the driving device, the differential 5 is fixedly connected to an output gear 47 of the transmission and rotates along with the output gear 47, and meanwhile, two half-shaft gears of the differential 5 form an output end of the driving device. So set up, this drive arrangement is fit for being applied to the vehicle, through two side gear output power of differential mechanism 5, can satisfy the requirement that the vehicle turned when the both sides wheel rotational speed is different.

The attachment of the differential 5 to the output gear 47 of the transmission can be arranged as follows: the differential housing 51 is provided with external gear teeth which form the output gear 47; or, the output gear 47 is sleeved and fixedly connected to the housing of the differential 5. In this way, the housing of the differential 5 is integrated with the output gear 47.

The differential 5 is rotatably connected at both ends thereof to the wall of the shift chamber through bearings and can be sealed by oil seals 32.

In one embodiment, the driving device is further provided with an inter-wheel differential lock 6, and the inter-wheel differential lock 6 is used for locking a rotating shaft of the differential mechanism 5, so that two side gears of the differential mechanism 5 have no speed difference, and two wheels of the vehicle rotate at the same speed. The inter-wheel differential lock 6 includes a cylinder 61, a cylinder housing, a shift fork 62, and a sliding sleeve 63. The one end and the casing 1 of the cylinder shell of differential lock 6 link firmly between the wheel, be provided with the piston rod that supplies cylinder 61 on the casing 1 and stretch into and the hole or the groove of slip displacement, slip meshing cover 63 has internal spline and connects on casing 1 along axial slidable, and it is relative with differential 5's pivot, set up the recess that supplies the embedding of shift fork 62 on the outer wall of slip meshing cover 63, cylinder 61 drives the displacement of shift fork 62, shift fork 62 drives slip meshing cover 63 axial slip and with the epaxial splined engagement of differential 5, thereby locking differential 5's pivot.

Another embodiment of the present application further provides a driving axle, which includes a brake and the driving device according to any one of the above embodiments. As shown in FIG. 2, the driving axle provided by the present application has a compact structure of the driving device, high integration, a large gap between the driving device and the brake, convenient arrangement in the transverse direction of the driving axle, two-gear speed change, and more flexible use. The derivation process of the beneficial effect is substantially the same as the derivation process of the beneficial effect of the driving device, and is not described herein again.

Another embodiment of the present application also provides a vehicle including the transaxle as described in the above embodiments. As shown in FIG. 2, the vehicle provided by the present application has a compact structure of the driving device, high integration, a larger clearance with the brake, convenient arrangement in the transverse direction of the driving axle, two-gear speed change, and more flexible use. The derivation process of the beneficial effect is substantially the same as the derivation process of the beneficial effect of the driving device, and is not described herein again.

The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.

The components, devices referred to in this application are provided as illustrative examples only and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the drawings. The components, devices may be connected, arranged, configured in any manner, as will be appreciated by those skilled in the art. Words such as "including," "comprising," "having," and the like are open-ended words that mean "including, but not limited to," and are used interchangeably therewith. As used herein, the words "or" and "refer to, and are used interchangeably with, the word" and/or, "unless the context clearly dictates otherwise. The word "such as" is used herein to mean, and is used interchangeably with, the phrase "such as but not limited to".

It should also be noted that in the apparatus, devices of the present application, the components may be disassembled and/or recombined. These decompositions and/or recombinations are to be considered as equivalents of the present application.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other aspects without departing from the scope of the application. Thus, the present application is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

It should be understood that the terms "first" and "second" used in the description of the embodiments of the present application are only used for clearly illustrating the technical solutions, and are not used for limiting the protection scope of the present application.

The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modifications, equivalents and the like that are within the spirit and principle of the present application should be included in the scope of the present application.

Claims (10)

1. A drive device, comprising:

a motor body;

the transmission comprises a transmission body, a first gear transmission assembly, a second gear transmission assembly and a gear shifting component for shifting transmission gears;

the shell is divided into a motor cavity for accommodating the motor body and a speed change cavity for accommodating the speed changer body through a partition plate in the shell cavity.

2. The drive of claim 1, wherein the housing comprises:

the shell body is provided with a first opening on one side and a second opening on the other side, and is in an integrated structure with the partition plate;

a first end cap covering the first opening;

and the second end cover covers the second opening.

3. The drive of claim 1, wherein the output shaft of the motor body is integral with the input shaft of the transmission body to form an integral shaft, and the partition has a through hole for the integral shaft to pass through.

4. The drive device according to claim 3, wherein a first bearing and an oil seal are provided in the through hole, the oil seal sealing a gap between the through hole and the integrated shaft; one end of the integrated shaft is rotatably connected with the cavity wall, far away from the partition plate, of the motor cavity through a second bearing, and the other end of the integrated shaft is rotatably connected with the cavity wall, far away from the partition plate, of the variable speed cavity through a third bearing.

5. The drive of claim 3, wherein a differential is further disposed in the speed change chamber, the differential is fixedly connected with an output gear of the transmission, and two half-shaft gears of the differential form an output end of the drive;

outer gear teeth are arranged on a shell of the differential, and form the output gear; or the output gear is sleeved and fixedly connected on the shell of the differential mechanism;

and two ends of the differential are rotatably connected to the cavity wall of the speed change cavity.

6. The drive of claim 5 wherein said first gear drive assembly includes a first gear drive gear fixed to said unitary shaft and a first gear driven gear disposed about said transmission countershaft, said second gear drive assembly includes a second gear drive gear fixed to said unitary shaft and a second gear driven gear disposed about said countershaft, said shift member disposed about said countershaft in meshing engagement with said countershaft and optionally with said first gear driven gear or said second gear driven gear, said countershaft having a gear tooth in meshing engagement with said output gear.

7. The drive of claim 6, wherein said shift member is a shift coupling sleeve.

8. The drive of claim 5, further comprising an inter-wheel differential lock for locking the shaft of the differential, wherein the cylinder of the inter-wheel differential lock drives the fork and the sliding sleeve to move to engage with the shaft of the transmission.

9. A drive axle, characterized in that it comprises a drive device according to any one of claims 1-8.

10. A vehicle, characterized in that it comprises a drive axle according to claim 9.

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