CN218228525U

CN218228525U - Double-motor drive axle

Info

Publication number: CN218228525U
Application number: CN202222331028.6U
Authority: CN
Inventors: 吴志强; 杨鹏飞; 李春光
Original assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Current assignee: Guangdong Fuwa Engineering Manufacturing Co Ltd
Priority date: 2022-09-01
Filing date: 2022-09-01
Publication date: 2023-01-06
Anticipated expiration: 2032-09-01

Abstract

The double-motor driven axle comprises an axle housing, two half shafts and two motors; the axle housing comprises a mounting seat and two axle shafts respectively connected to two ends of the mounting seat, the two half shafts are respectively connected in the two axle shafts in a penetrating manner, and the inner side ends of the two half shafts extend into the mounting seat; the two motors are arranged in the mounting seat, the machine bodies of the two motors are fixedly connected with the mounting seat, and the central axes of the rotating shafts of the two motors are both arranged on a plane parallel to the horizontal plane; the two motors are arranged in one-to-one correspondence with the two half shafts, the central axis of the motor rotating shaft is arranged in parallel with the central axis of the half shaft, and the inner side end of the half shaft is synchronously connected with the rotating shaft of the motor corresponding to the half shaft. The utility model discloses the integrated configuration that two motors formed occupies that axle housing axial size is shorter relatively to promoted the holistic anti bending strength of axle, made the axle can be applicable to oversize vehicle.

Description

Double-motor drive axle

Technical Field

The utility model relates to the technical field of vehicles, concretely relates to two motor drive axles.

Background

With the continuous development of new energy technology, the electrically-driven axle is widely applied to the field of commercial vehicles so as to realize pure electric drive of the commercial vehicles. The prior electrically-driven axle is generally formed by improving a conventional axle of a fuel vehicle, wherein an electric motor is directly arranged on the conventional axle, an output shaft of the electric motor is connected to a speed reducer of the conventional axle, a differential mechanism and other structures still need to be arranged on the axle, the electric motor is required to output larger power, and the arrangement of a larger electric motor in the middle of an axle housing can also influence a counterweight structure of the axle. There are also some electrically driven axles dispose two motors on the axle, the power of two motors is transmitted to two wheel ends of axle through two semi-axles respectively, because two motors can be independently controlled, consequently need not to dispose parts such as differential mechanism, current two motor drive axles adopt coaxial arrangement's structure mostly, the central axis coincidence of two motors, and the central axis of motor and the central axis coincidence of axle, two motors are after coaxial arrangement, it occupies great space in the axial of axle, thereby make the bending strength of axle relatively lower, be difficult to be applicable to some large-scale vehicles.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims at providing a two motor drive axles, it can ensure that the axle has higher intensity, makes the axle can be applicable to the oversize vehicle.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the double-motor driven axle comprises an axle housing, two half shafts and two motors;

the axle housing comprises a mounting seat and two axle shafts respectively connected to two ends of the mounting seat, the two half shafts are respectively connected in the two axle shafts in a penetrating manner, and the inner side ends of the two half shafts extend into the mounting seat;

the two motors are arranged in the mounting seat, the machine bodies of the two motors are fixedly connected with the mounting seat, and the central axes of the rotating shafts of the two motors are both arranged on a plane parallel to the horizontal plane; the two motors are arranged in one-to-one correspondence with the two half shafts, the central axis of the rotating shaft of each motor is parallel to the central axis of the corresponding half shaft, and the inner side end of each half shaft is synchronously connected with the rotating shaft of the corresponding motor.

The two motors are respectively arranged on two sides of the central axis of the half shaft.

A speed reducer is arranged between the rotating shafts of the two motors and the half shafts corresponding to the rotating shafts, and the two speed reducers are installed in the installation seat.

The speed reducer comprises a speed reducer shell, an input gear and an output gear meshed with the input gear, one end of the speed reducer shell is connected to the axle shaft, the other end of the speed reducer shell is connected to the shell of the motor, the input gear and the output gear are both pivoted on the speed reducer shell, the inner side end of the half shaft is synchronously connected with the output gear, and the input gear is synchronously connected with the rotating shaft of the motor; the diameter of the input gear is smaller than the diameter of the output gear.

The shell of the motor comprises a first end and a second end opposite to the first end, the first end is provided with a connecting flange, the connecting flange is fixedly connected with the other end of the shell of the speed reducer through a bolt, and the second end is fixedly connected to the mounting seat; the rotating shaft of the motor protrudes out of the first end and is connected with the input gear.

The one end that the axle is close to the mount pad forms a mounting groove, and the one end of reduction gear housing is outstanding is provided with an annular protruding muscle, and annular protruding muscle inlays to be put in the mounting groove, and the medial surface laminating of the outer fringe face of annular protruding muscle and mounting groove, and a clamping has a sealing washer between the medial surface of the outer fringe face of annular protruding muscle and mounting groove.

The second end of the motor shell is fixed on the mounting seat through a connecting plate.

The wheel shaft of the output gear is pivoted on the shell of the speed reducer through a bearing, and a bearing cover pressed on the outer ring of the bearing is fixed on the shell of the speed reducer through a bolt.

The axle of the output gear is provided with an axle hole, and the inner side end of the half axle is connected in the axle hole in a penetrating way and is connected with the axle of the output gear through a spline.

The mounting seat and the two bridge shafts are integrally formed.

The mounting seat is fixedly connected with the two bridge shafts in a detachable mode.

The mount pad includes two mounting brackets of arranging and relative setting from top to bottom, the mounting bracket includes the backup pad, and two connection end plates that are located the backup pad both ends respectively, the medial extremity of axle is provided with along its radial outside fixed plate that extends, two parts paste respectively about the fixed plate of axle lean on the connection end plate outside at two mounting brackets same ends, and the fixed plate is together fixed through a plurality of connecting bolt that cross it with connection end plate, two backup pads, be located the connection end plate at two backup pad both ends, and the fixed plate encloses into a chamber of acceping that is used for acceping two motors jointly.

The side of backup pad is connected with the reinforcing plate with the position department that the side of connecting the end plate links up.

The bridge shaft is provided with a plurality of reinforcing ribs extending from the outer surface of the bridge shaft to the outer side surface of the fixing plate, and the plurality of reinforcing ribs are arranged in a circumferential array around the central axis of the bridge shaft.

The beneficial effects of the utility model reside in that:

the utility model discloses form the mount pad at axle housing length direction's middle part, utilize two motors side by side of mount pad installation, two motors respectively with the synchronous hookups of two semi-axles in the axle shaft, two motors arrange side by side and install in the mount pad around the horizontal direction, the horizontal space of make full use of mount pad, the integrated configuration that two motors formed occupies that the axial size of axle housing is relatively short, thereby the holistic anti bending strength of axle has been promoted, make the axle can be applicable to oversize vehicle, and two motors pass through two wheel ends of two semi-axles with power transmission to axle respectively, make two wheel ends can be by independent control, need not to dispose parts such as differential mechanism.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the installation of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view A-A of FIG. 1;

FIG. 4 is an enlarged view at B of FIG. 3;

fig. 5 is an assembly view of the reducer and the motor of fig. 2.

Detailed Description

The invention will be further described with reference to the accompanying drawings and specific embodiments:

as shown in fig. 1, 2, 3, 4, and 5, for the utility model discloses a dual-motor drive axle, including an axle housing, two half shafts 60, two motors 20, the axle housing includes a mounting seat, two axle shafts 10 are connected respectively at the both ends of mounting seat, two half shafts 60 are worn respectively inside two axle shafts 10, and the medial extremity of two half shafts 60 all extends to in the mounting seat, two motors 20 are all placed in the mounting seat, the organism part of two motors 20 all is connected with the fixing base, the model of the two motors 20 is the same, arrange two motors 20 horizontally, and the central axis of two motors 20 all sets up with the central axis of half shaft 50 in parallel, namely the central axis of two motors 20 is parallel to each other, and all is unanimous with the extending direction of axle shafts 10, half shafts 60, the central axis of two motors 20 all falls on a plane, namely constitutes the plane by the central axis of two motors 20, the plane is parallel with the horizontal plane; the two electric motors 20 and the two half shafts 60 are arranged in a one-to-one correspondence manner, specifically, the rotating shafts of the two electric motors 20 are arranged in opposite directions, so that the rotating shafts of the two electric motors respectively face the two axle shafts 10, the two half shafts 60 penetrating into the two axle shafts 10 are arranged in a one-to-one correspondence manner with the two electric motors 20, and the rotating shafts of the electric motors 20 are synchronously connected with the end parts of the half shafts 60 corresponding to the electric motors 20, which extend into the mounting seats.

In the scheme, the mounting seat is formed in the middle of the axle housing in the length direction, the two motors 20 which are arranged side by side are mounted by using the mounting seat, the two motors 20 are respectively and synchronously connected with the two half shafts 60 in the axle shaft 10, the two motors 20 are arranged in the mounting seat in the front and back side by side along the horizontal direction, the transverse space of the mounting seat is fully utilized, the combined structure formed by the two motors 20 occupies a relatively short axial size of the axle housing, the integral bending strength of the axle is improved, the axle can be suitable for large vehicles, the two motors 20 respectively transmit power to the two wheel ends of the axle through the two half shafts 60, the two wheel ends can be independently controlled, and components such as a differential mechanism are not required to be configured.

In a preferred embodiment, to ensure that the axle is weighted on both sides of the centerline axis, the two motors 20 are positioned on either side of the centerline axis of axle shaft 60, and a speed reducer 50 is disposed between the rotation shafts of the two motors 20 and the half shafts 60 corresponding thereto, both the speed reducers 50 are installed in the mount, since the two electric machines 20 are arranged in tandem, and the center axes of the half shafts 60 are located at the center positions in the radial direction of the axle, therefore, the central axes of the rotating shafts of the two motors 20 are staggered with a certain distance from the central axis of the half shaft 60, the motor rotating shaft and the half shaft 60 which are staggered with a certain distance are synchronously connected through the speed reducer 50, so that power transmission is realized, the speed reducer 50 comprises a speed reducer shell 51, an input gear 52 and an output gear 53, wherein the input gear 52 and the output gear 53 are both arranged in the speed reducer shell 51, the diameter of the input gear 52 is smaller than that of the output gear 53, and the input gear 52 and the output gear 53 are engaged, one end of the reducer case 51 is connected to the inner side end of the axle shaft 10 through the end of the mounting seat, the other end is connected to the housing of the motor 20, the central axis of the half shaft 60 coincides with the central axis of the output gear 53, and one end of the half shaft 60 penetrating the mounting seat is synchronously coupled with the output gear 53, the central axis of the input gear 52 coincides with the central axis of the rotating shaft of the motor 20, the input gear 52 is synchronously coupled on the rotating shaft of the motor 20, the power output by the motor 20 is transmitted to the half shaft 60 by the speed reducing mechanism consisting of the input gear 52 with smaller diameter and the output gear 53 with relatively larger diameter, and the distance of the central axis of the rotating shaft of the motor 20 and the central axis of the half shaft 60 is just the sum of the radius of the input gear 52 and the radius of the output gear 53; in the preferred embodiment of the present invention, the two gears with different sizes are used to form the speed reducing mechanism, so as to realize the power transmission between the motor 20 and the half shaft 60, and in fact, in other embodiments, the speed reducing mechanism built in the speed reducer 50 is not necessarily the gear transmission structure.

The casing of the motor 20 comprises a first end 201 and a second end 202 opposite to the first end, a rotating shaft of the motor 20 penetrates out of the first end 201, the first end 201 of the casing of the motor 20 is provided with a connecting flange 21, a speed reducer shell 51 is correspondingly provided with a connecting flange 57, the connecting flange 21 and the connecting flange 57 are arranged oppositely, and the two are fixedly connected together through a plurality of bolts, so that the speed reducer shell 51 is fixed on the first end 201 of the casing of the motor 20, and the second end of the casing of the motor 20 is fixedly connected on the mounting seat; the rotating shaft of the motor 20 protrudes from the first end 201 and then extends into the reducer shell 51 to be connected with the input gear 52; the second end of the housing of the motor 20 is fixedly connected to the mounting base, and specifically, a connecting plate 22 is disposed on the mounting base, the connecting plate 22 is vertically disposed, the top of the connecting plate is fixed to the mounting base by bolts, and the bottom of the connecting plate is disposed at the second end 202 and fixed to the second end 202.

In order to make the reducer 50 fit with the mounting seat well and ensure that the output gear 53 in the reducer 50 has high coaxiality with the half shaft 60, a mounting groove 101 is formed at one end of the axle shaft 10 close to the mounting seat, the mounting groove 101 is positioned at the outer periphery of a hole through which the half shaft 60 penetrates at the inner side end of the axle shaft 10, an annular convex rib 511 is convexly arranged at one end of the reducer housing 51, the annular convex rib 511 is embedded in the mounting groove 101, the outer edge surface of the annular convex rib 511 is attached to the inner side surface of the mounting groove 101, the reducer housing 51 and the axle shaft 10 are positioned through the annular convex rib 511 and the inner side surface of the mounting groove 101, the half shaft 60 is coaxially matched with the output gear 53, meanwhile, a sealing ring 512 is clamped between the outer edge surface of the annular convex rib 511 and the inner side surface of the mounting groove 101, and the position where the reducer housing 51 is matched with the axle shaft 10 is sealed through the sealing ring 512, so that the leakage of oil in the inner cavity of the reducer housing 10 and the inner cavity of the reducer housing 51 is avoided.

The axle of the output gear 53 is pivotally connected to the reducer casing 51 through a bearing 55, a bearing cover 54 pressed on the outer ring of the bearing 55 is fixed to the reducer casing 51, the bearing cover 54 is fixed to the reducer casing 51 through bolts, the bearing cover 54 can be pressed on the reducer casing 51 by tightening the bolts, and then the bearing cover 54 is pressed on the bearing 55. A shaft hole is formed on the wheel axle of the output gear 53, the inner end of the half shaft 60 (i.e. the end of the half shaft 60 penetrating the mounting seat) is penetrated in the shaft hole, and the half shaft 60 and the wheel axle of the output gear 53 are connected together through a spline.

In the preferred embodiment of the present invention, the mounting seat and the two axle shafts 10 are fixed together in a detachable manner, and the two axle shafts 10 are respectively connected to the two ends of the mounting seat in a bolt-fastening manner. The mounting seat comprises two mounting frames 40 which are arranged up and down and are arranged oppositely, each mounting frame 40 comprises a supporting plate 41 and two connecting end plates 42, the two connecting end plates 42 are respectively positioned at two end parts of the supporting plate 41, the two connecting end plates 42 can be integrally formed with the supporting plate 41 by adopting a casting process, and the outer side surfaces of the two connecting end plates 42 which are arranged up and down are arranged in parallel and level at the same end part of the mounting seat; the inner end of the axle shaft 10 is provided with a fixing plate 12 extending outwards along the radial direction, the top and bottom shapes of the fixing plate 12 are respectively consistent with the shapes of the two connecting end plates 42 arranged up and down, the fixing plate 12 is attached to the outer side faces of the two connecting end plates 42 arranged up and down at the same end of the mounting seat, a plurality of bolts are utilized to transversely penetrate through the fixing plate 12 and the connecting end plates 42, the two connecting end plates 42 at the same end of the mounting seat are fixedly connected to the fixing plate 12, and the axle shaft 10 at one end of the mounting seat is fixedly connected to the mounting seat, so that the two supporting plates 41 arranged up and down, the four connecting end plates 42 and the two fixing plates 12 on the two axle shafts 10 jointly enclose a containing cavity located inside the mounting seat, and the two motors 20 are arranged in the containing cavity. In this structure, two upper and lower parts of two motors 20 are sheltered from through two backup pads 41 respectively, and in the vehicle driving process, protect two motors 20 through backup pad 41, and more importantly, two backup pads 41 are located the upper and lower both sides at axle length direction middle part respectively, and when the axle received the bending force, two backup pads 41 were as the load part, avoided motor 20 atress to produce deformation, guaranteed that the axle has the intensity of preferred. In order to further increase the strength of the mounting seat, the utility model discloses the position department that links up at the side of backup pad 41 and the side of connecting end plate 42 is connected with reinforcing plate 43. In order to further improve the overall strength of the axle, a plurality of reinforcing ribs 13 are arranged on the axle shaft 10, the reinforcing ribs 13 extend from the outer surface of the axle shaft 10 to the outer side surface of the fixing plate 12, and the plurality of reinforcing ribs 13 are arranged in a circumferential array around the central axis of the axle shaft.

In the above preferred embodiment, the axle shaft 10 and the mounting seat are fixed together by bolts, so that the motor 20 and the speed reducer 50 can be conveniently assembled in the mounting seat, the assembly efficiency of the whole axle is improved, and in fact, the mounting seat and the axle shaft 10 can be detachably fixed by other connecting manners. In other embodiments, the mounting seat is integrally formed with the two axle shafts 10, which may be integrally formed, in particular, by a casting process.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still make modifications to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some technical features, and these modifications or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. The double-motor driven axle is characterized by comprising an axle housing, two half shafts and two motors;

the axle housing comprises a mounting seat and two axle shafts which are respectively connected to two ends of the mounting seat, the two half shafts are respectively penetrated in the two axle shafts, and the inner side ends of the two half shafts extend into the mounting seat;

the two motors are arranged in the mounting seat, the machine bodies of the two motors are fixedly connected with the mounting seat, and the central axes of the rotating shafts of the two motors are both arranged on a plane parallel to the horizontal plane; the two motors are arranged in one-to-one correspondence with the two half shafts, the central axis of the motor rotating shaft is arranged in parallel with the central axis of the half shaft, and the inner side end of the half shaft is synchronously connected with the rotating shaft of the motor corresponding to the half shaft.

2. The dual motor drive axle of claim 1, wherein the two motors are disposed on opposite sides of the central axis of the axle shaft.

3. The dual-motor driven axle of claim 2, wherein a speed reducer is disposed between the rotating shaft of each of the two motors and the corresponding half shaft, and both speed reducers are mounted in the mounting seats.

4. The dual-motor driven axle of claim 3, wherein the speed reducer comprises a speed reducer housing, an input gear, and an output gear engaged with the input gear, one end of the speed reducer housing is connected to the axle shaft, the other end is connected to the housing of the motor, the input gear and the output gear are both pivoted to the speed reducer housing, the inner end of the half shaft is synchronously coupled to the output gear, and the input gear is synchronously coupled to the rotating shaft of the motor; the diameter of the input gear is smaller than the diameter of the output gear.

5. The dual-motor driven axle of claim 4, wherein the housing of the motor comprises a first end and a second end opposite to the first end, the first end is provided with a connecting flange, the connecting flange is fixedly connected with the other end of the shell of the speed reducer through a bolt, and the second end is fixedly connected to the mounting seat; the rotating shaft of the motor protrudes out of the first end and is connected with the input gear.

6. The dual motor vehicle axle of claim 4, wherein a mounting groove is formed at an end of the axle shaft adjacent to the mounting seat, an annular rib is protrudingly provided at an end of the reducer housing, the annular rib is fitted into the mounting groove, an outer edge surface of the annular rib is fitted to an inner side surface of the mounting groove, and a seal ring is sandwiched between the outer edge surface of the annular rib and the inner side surface of the mounting groove.

7. The dual motor drive axle of claim 4, wherein the second end of the motor housing is secured to the mounting seat by a coupling plate.

8. The dual-motor driven axle of claim 4, wherein the axle of the output gear is pivotally connected to the housing of the speed reducer through a bearing, and a bearing cover pressed on the outer race of the bearing is fixed to the housing of the speed reducer through a bolt.

9. The dual motor drive axle of claim 8, wherein the axle shaft of the output gear has a shaft bore, and the inboard end of the axle shaft extends through the shaft bore and is splined to the axle shaft of the output gear.

10. The dual motor drive axle of claim 1 wherein the mounting seats are integrally formed with the axle shafts.

11. The dual motor drive axle of claim 1, wherein the mounting block is removably fixedly attached to the axle shafts.

12. The dual-motor driven axle of claim 11, wherein the mounting seat comprises two mounting brackets disposed in an up-down arrangement and facing each other, the mounting brackets comprise a supporting plate and two connecting end plates disposed at two ends of the supporting plate, respectively, a fixing plate extending radially outward is disposed at an inner end of the axle, the upper and lower portions of the fixing plate of the axle respectively abut against the outer sides of the connecting end plates at the same end of the two mounting brackets, the fixing plate and the connecting end plates are fixed together by a plurality of connecting bolts penetrating through the fixing plate, and the two supporting plates, the connecting end plates disposed at two ends of the two supporting plates, and the fixing plate together define a receiving cavity for receiving the two motors.

13. The dual motor drive axle of claim 12, wherein a reinforcement plate is attached at a location where a side edge of the support plate engages a side edge of the attachment end plate.

14. The dual motor drive axle of claim 12, wherein the axle shaft is provided with a plurality of ribs extending from an outer surface of the axle shaft to an outer side surface of the stationary plate, the plurality of ribs being arranged in a circumferential array about a central axis of the axle shaft.