CN217227200U

CN217227200U - Electric drive axle

Info

Publication number: CN217227200U
Application number: CN202220536477.1U
Authority: CN
Inventors: 郝庆军; 冯涛; 陆诸军; 曹翔
Original assignee: Capotech Suzhou Co ltd
Current assignee: Capotech Suzhou Co ltd
Priority date: 2022-03-14
Filing date: 2022-03-14
Publication date: 2022-08-19
Anticipated expiration: 2032-03-14

Abstract

The utility model relates to an electric drive axle, which comprises an Electric Motor (EM) and a differential (D); the input shaft (S1) is coaxially nested with a left half Shaft (SL) of the differential (D); the clutch also comprises a first clutch (A) and a second clutch (B), and the output shaft of the motor is coaxially and fixedly connected with the input shaft, and the input shaft and the differential half shaft are coaxially nested, so that the structure is compact, and the occupied space and the driving cost are reduced; the first clutch can be selectively connected with the first gear set and the second gear set on two sides, so that two-gear switching is realized; the differential locking function can be realized by selectively engaging the second clutch with the differential, and when the drive axle runs on a bad road, the differential is locked, so that the two drive axles are in rigid connection, large torque is transmitted to the drive axle which does not slip, enough traction force is generated to realize the continuous running of the vehicle, and the service life of the drive axle is prolonged.

Description

Electric drive axle

Technical Field

The utility model relates to an automotive transmission field, concretely relates to electric drive axle.

Background

Energy conservation and environmental protection become two major topics of automobile technical development, in recent years, hybrid electric vehicles capable of effectively reducing oil consumption and exhaust emission are widely developed and applied, and the main research and development direction is focused on technical improvement of gearboxes.

An automotive transaxle is a mechanism located at the end of the drive train that changes the rotational speed and torque from the transmission and transmits them to the drive wheels. If the power is integrated on the drive axle, the transmission path is short, the transmission efficiency is high, and the energy conservation is facilitated.

Disclosure of Invention

In order to solve the defects and the insufficiency existing in the prior art, the utility model provides an electric drive axle.

The utility model provides a concrete scheme does: an electric drive axle comprising an Electric Machine (EM) and a differential (D); the output shaft of the motor (EM) is coaxially and fixedly connected with an input shaft (S1), the input shaft (S1) is connected with an intermediate shaft (S2) through a first gear set (GR1) or a second gear set (GR2), and the intermediate shaft (S2) is connected with a differential (D) through an output gear set (GR 3); the input shaft (S1) is coaxially nested with a left half Shaft (SL) of the differential (D);

the first clutch (A) is arranged on the intermediate shaft (S2) and can be selectively engaged with the gears of the first gear set (GR1) on two sides or the gears of the second gear set (GR 2);

a second clutch (B) disposed on the input shaft (S1) and selectively engageable with a side differential (D).

Further, the input shaft (S1) is fitted around the outer periphery of the left half Shaft (SL) of the differential (D).

Further, the first gear set (GR1) includes a first driving gear (G11) fixedly disposed on the input shaft (S1) and a first driven gear (G12) movably sleeved on the intermediate shaft (S2), and the first driving gear (G11) is correspondingly engaged with the first driven gear (G12).

Further, the second gear set (GR2) includes a second driving gear (G21) fixedly disposed on the input shaft (S1) and a second driven gear (G22) movably sleeved on the intermediate shaft (S2), and the second driving gear (G21) is correspondingly engaged with the second driven gear (G22).

Further, the output gear set (GR3) includes an output driving gear (G31) fixedly disposed on the intermediate shaft (S2) and an output driven gear (G32) fixedly disposed on the differential (D), and the output driving gear (G31) is correspondingly engaged with the output driven gear (G32).

Further, the output driven gear (G32) is fixedly arranged on a shell (D1) of the differential (D), the shell (D1) is fixedly connected with a bevel gear shaft (D2), the bevel gear shaft (D2) is fixedly connected with a bevel gear (D3), the bevel gear is respectively meshed with a left half shaft gear (D4) and a right half shaft gear (D4), the left half shaft gear is sleeved on the left half Shaft (SL), and the right half shaft gear is sleeved on the right half Shaft (SR).

Further, the electric drive axle comprises the following operating modes:

1) when the gear is in the N gear, the first clutch (A) is located at the middle position, and the second clutch (B) is not engaged with the differential mechanism;

2) in the 1 gear, the first clutch (A) is engaged with a gear of a first gear set (GR1) on one side, and the second clutch (B) is not engaged with a differential;

3) in the 2-gear, the first clutch (A) is engaged with a gear of the second gear set (GR1) on the other side, and the second clutch (B) is not engaged with the differential;

4) in gear 3, the first clutch (a) engages a gear of the first gear set (GR1) on one side, and the second clutch (B) engages the differential.

Compared with the prior art, the utility model discloses the technological effect that can realize includes:

1) the utility model provides an electric drive axle, which effectively realizes compact structure, reduces occupied space and driving cost by coaxially and fixedly connecting a motor output shaft and an input shaft and coaxially nesting the input shaft and a differential mechanism half shaft;

2) the utility model provides an electric drive axle can realize through the setting of first clutch with the gear of the first gear train of both sides and the optional connection of the gear of second gear train to realize two fender switches.

3) The utility model provides an electric drive axle, through the setting of second clutch selectively with differential mechanism joint to can realize differential locking function, locking differential mechanism when the transaxle is traveling on bad road surface makes two transaxles become rigid connection, makes on the drive axle that the big moment of torsion transmitted not the slip, produce the continuation of enough traction force realization vehicle and travel, the life of extension transaxle.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

[ first embodiment ]

The utility model provides an electric drive axle, as shown in figure 1, is the first embodiment of the invention, in this embodiment, the electric drive axle includes motor EM and differential D; an output shaft of the electric machine EM is coaxially and fixedly connected with an input shaft S1, the input shaft S1 is connected with an intermediate shaft S2 through a first gear set GR1 or a second gear set GR2, and the intermediate shaft S2 is connected with a differential D through an output gear set GR 3.

In the present embodiment, the first gear set GR1 includes a first driving gear G11 fixedly disposed on the input shaft S1 and a first driven gear G12 movably sleeved on the intermediate shaft S2, and the first driving gear G11 is correspondingly engaged with the first driven gear G12.

The second gear set GR2 includes a second driving gear G21 fixed on the input shaft S1 and a second driven gear G22 movably sleeved on the intermediate shaft S2, and the second driving gear G21 is correspondingly engaged with the second driven gear G22.

As shown in fig. 1, the present embodiment includes a first clutch a disposed on the intermediate shaft S2 and selectively engaged with the gear of the first gear set GR1 or the gear of the second gear set GR2 on two sides; thus, the two-gear transmission working mode of the electric drive axle is realized through the first clutch.

In the present embodiment, the output gear set GR3 includes an output driving gear G31 fixedly disposed on the intermediate shaft S2 and an output driven gear G32 fixedly disposed on the differential D, and the output driving gear G31 is engaged with the output driven gear G32.

In a further preferred embodiment, the output driven gear G32 is fixedly mounted on a housing D1 of the differential D, the housing D1 is fixedly connected to a bevel gear shaft D2, the bevel gear shaft D2 is fixedly connected to a bevel gear D3, the bevel gears are respectively engaged with left and right axle gears D4, the left axle gear is mounted on the left axle shaft SL, and the right axle gear is mounted on the right axle shaft SR.

As shown in fig. 1, the present embodiment includes a second clutch B disposed on the input shaft S1 and selectively engaged with one side differential D, so that when the second clutch B is engaged with the differential D, a differential locking function can be achieved, and when the drive axle is driving on a bad road, the differential is locked, so that the two drive axles become rigid connection, so that a large torque is transmitted to the drive axle which is not slipping, and sufficient traction force is generated to achieve continuous driving of the vehicle, thereby prolonging the service life of the drive axle.

As another improvement of the present embodiment over the prior art: the input shaft S1 is coaxially nested with the left half shaft SL of the differential D; thereby effectively realizing compact structure, reducing the occupied space and the driving cost.

As a further preferable mode of the present embodiment, the nested arrangement is implemented such that the input shaft S1 is fitted around the outer periphery of the left half shaft SL of the differential D.

The electric drive axle provided by this embodiment includes the following modes of operation:

1) when the gear N is shifted, the first clutch A is located at the middle position, and the second clutch B is not engaged with the differential mechanism; at the moment, the motor EM idles and does not output power;

2) in the 1 gear, the first clutch A is engaged with a gear of the first gear set GR1 on one side, and the second clutch B is not engaged with the differential; at the moment, the output power of the motor EM is transmitted to the differential D through the first gear set GR1 and then is transmitted to the wheels on the corresponding side from the left half shaft and the right half shaft;

3) in the 2-gear, the first clutch A is engaged with a gear of the second gear set GR1 on the other side, and the second clutch B is not engaged with the differential; at the moment, the output power of the motor EM is transmitted to the differential D through the second gear set GR2 and then is transmitted to the wheels on the corresponding side from the left half shaft and the right half shaft;

4) in gear 3, the first clutch A is engaged with a gear of the first gear set GR1 on one side, and the second clutch B is engaged with a differential; meanwhile, the differential D realizes a locking function, the two drive axles are in rigid connection, the power output by the motor EM is rapidly transmitted to the drive axle which does not slip through the large power torque after passing through the first gear set GR1, sufficient traction force is generated to realize the continuous running of the vehicle, and the service life of the drive axle is prolonged.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An electric transaxle comprising an Electric Machine (EM) and a differential (D); an output shaft of the motor (EM) is coaxially and fixedly connected with an input shaft (S1), the input shaft (S1) is connected with a middle shaft (S2) through a first gear set (GR1) or a second gear set (GR2), and the middle shaft (S2) is connected with a differential (D) through an output gear set (GR 3);

the method is characterized in that:

the input shaft (S1) is coaxially nested with a left half Shaft (SL) of the differential (D);

the gear transmission system further comprises a first clutch (A) which is arranged on the intermediate shaft (S2) and can be selectively engaged with the gears of the first gear set (GR1) on two sides or the gears of the second gear set (GR 2);

2. An electric drive axle according to claim 1, wherein: the input shaft (S1) is sleeved on the periphery of a left half Shaft (SL) of the differential (D).

3. An electric drive axle according to claim 1 or 2, characterized in that: the first gear set (GR1) includes a first driving gear (G11) fixedly disposed on the input shaft (S1) and a first driven gear (G12) movably sleeved on the intermediate shaft (S2), and the first driving gear (G11) is correspondingly engaged with the first driven gear (G12).

4. An electric drive axle according to claim 1 or 2, characterized in that: the second gear set (GR2) comprises a second driving gear (G21) fixedly arranged on the input shaft (S1) and a second driven gear (G22) movably sleeved on the intermediate shaft (S2), and the second driving gear (G21) is correspondingly meshed with the second driven gear (G22).

5. An electric drive axle according to claim 1 or 2, characterized in that: the output gear set (GR3) comprises an output driving gear (G31) fixedly arranged on the intermediate shaft (S2) and an output driven gear (G32) fixedly arranged on the differential (D), and the output driving gear (G31) is correspondingly meshed with the output driven gear (G32).

6. An electric drive axle according to claim 5, wherein: the output driven gear (G32) is fixedly arranged on a shell (D1) of the differential (D), the shell (D1) is fixedly connected with a bevel gear shaft (D2), the bevel gear shaft (D2) is fixedly connected with a bevel gear (D3), the bevel gear is respectively meshed with a left half shaft gear (D4) and a right half shaft gear (D4), the left half shaft gear is sleeved on the left half Shaft (SL), and the right half shaft gear is sleeved on the right half Shaft (SR).

7. An electric drive axle according to claim 1 or 2, characterized in that: the electric drive axle comprises the following operating modes:

2) in the 1 gear, the first clutch (A) is engaged with a gear of a first gear set (GR1) on one side, and the second clutch (B) is not engaged with a differential mechanism;

3) in the 2-gear state, the first clutch (A) is engaged with a gear of a second gear set (GR2) on the other side, and the second clutch (B) is not engaged with a differential mechanism;