Motor mounting structure of electric drive axle and electric drive axle

Abstract

The motor mounting structure of the electric drive axle comprises an axle housing, a motor, a main speed reducer, an axle housing, an axle package and two axle pipes, an opening is formed in the axle package, a connecting ring is formed on the periphery of the opening, the main speed reducer comprises a shell, and the shell is provided with a through hole. A first flange plate and a second flange plate are arranged on the shell, and the first flange plate is in butt joint with the connecting ring and fixed to the connecting ring through bolts. The motor comprises a first end and a second end, the first end is in butt joint with the second flange plate, a support is arranged between the second end of the motor and the axle housing, one end of the support is fixedly connected with the second end of the motor, and the other end of the support is fixedly connected to the first flange plate or the connecting ring. According to the utility model, the vibration amplitude of the motor can be reduced, the motor is prevented from colliding with other parts of a vehicle chassis, and the probability that the vehicle vibrates and the motor vibrates to generate resonance when the vehicle is on different road surfaces is reduced, so that a better protection effect on the motor is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, and in particular to a motor mounting structure of an electric drive axle and the electric drive axle. Background Art

[0002] With the continuous popularization of new energy technology, electric drive technology has been widely used in commercial vehicles. The main part of most existing electric drive axles still uses the original fuel-driven axles, but the transmission shaft between the engine and the main reducer of the drive axle is cancelled, and the motor is directly connected to the main reducer. The motor drives the main reducer and uses the differential inside the main reducer to transmit power to the half shafts on both sides of the bridge housing, and then transmits the power to the wheel end; after the existing motor is installed on the drive axle, due to the large overall weight of the motor, the drive axle is difficult to provide sufficient support for the motor. When the vehicle is driving on some potholes, the drive axle does not provide sufficient support for the motor. When the motor vibrates with the drive axle in a large amplitude, the motor is very likely to produce relative displacement with the drive axle, and then the motor collides with other parts of the vehicle chassis, causing damage to the motor. In addition, since the drive axle cannot provide better support for the motor, the vibration frequency generated by the motor body during driving is close to the vibration frequency generated by the vehicle on the uneven road surface, so as to produce resonance, thereby causing greater damage to the motor or even causing damage to the motor. Utility Model Content

[0003] In view of the deficiencies of the prior art, the first object of the present invention is to provide a motor mounting structure for an electric drive axle, which can provide better support for the motor to protect the motor from damage.

[0004] The second purpose of the utility model is to provide an electric drive axle.

[0005] In order to achieve the above purpose one, the utility model adopts the following technical solution:

[0006] The motor mounting structure of the electric drive axle includes a bridge housing, a motor, and a main reducer. The bridge housing includes a bridge bag located in the middle thereof, two bridge tubes located on both sides of the bridge bag, an opening is provided on the bridge bag, and a connecting ring is formed at the periphery of the opening. The main reducer includes a housing, a first flange plate and a second flange plate perpendicular to the first flange plate are provided on the housing, and the first flange plate is docked on the connecting ring and fixed to the connecting ring by bolts;

[0007] The motor includes a first end and a second end opposite to the first end. The output shaft of the motor passes through the first end. The first end is docked on the second flange and fixed to the second flange so that the output shaft is parallel to the length direction of the bridge housing. A bracket is arranged between the second end of the motor and the bridge housing. One end of the bracket is fixedly connected to the second end of the motor, and the other end is fixedly connected to the first flange or the connecting ring.

[0008] The bracket includes an end plate fixedly connected to the second end of the motor, a connecting plate fixed to the first flange or the connecting ring by connecting bolts, and a support arm, one end of the support arm is fixed to the end plate and the other end is fixed to the connecting plate.

[0009] One end of the support arm is provided with a plurality of long holes extending in the same direction as the axial direction of the motor, and fastening bolts are inserted into the long holes. The fastening bolts are screwed to the end plate after passing through the long holes to press one end of the support arm onto the end plate through the nuts of the fastening bolts.

[0010] The support arm comprises a support plate welded and fixed on the connecting plate, and a reinforcing rib plate, two adjacent sides of the reinforcing rib plate are respectively welded and fixed on the support plate and the connecting plate, and a plurality of long holes are arranged on the support plate.

[0011] One end of the support plate with the long hole is located below the end plate so that the support arm supports the second end of the motor below the motor.

[0012] The first end of the motor is provided with a connecting plate protruding outwardly in the radial direction of the motor. The connecting plate is butted against the second flange and fixed to the second flange by a plurality of bolts arranged along the circumference of the motor.

[0013] In order to achieve the above-mentioned second purpose, the utility model adopts the following technical solutions:

[0014] An electric drive axle comprises the above-mentioned motor mounting structure of the electric drive axle.

[0015] The beneficial effects of the utility model are:

[0016] In the utility model, the first end of the motor is fixedly connected to the second flange of the main reducer housing, and the second end of the motor is connected to the bridge housing through a bracket. In this way, the two ends of the motor are fixedly matched with the bridge housing indirectly or directly, so that the bridge housing provides better support for the motor. During the driving of the vehicle, the vibration amplitude of the motor can be reduced to avoid collision between the motor and other parts of the vehicle chassis. At the same time, the probability of resonance between the vehicle vibration and the motor vibration on different road surfaces is reduced, thereby achieving better protection for the motor and improving the service life of the electric drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the utility model;

[0018] Figure 2 for Figure 1 Schematic diagram of the connection between the middle bracket and the motor;

[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the middle bracket. DETAILED DESCRIPTION

[0020] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0021] like Figure 1 , 2 3 shows a motor mounting structure of an electric drive axle of the utility model, which includes a bridge housing 10, a motor 30, and a main reducer. The bridge housing 10 includes a bridge package 11 located in the middle thereof, and two bridge tubes 12 located on both sides of the bridge package 11, respectively. The bridge package 11 is provided with an opening, and a connecting ring 13 is formed at the periphery of the opening. The main reducer includes a housing 20, and the housing 20 is provided with a first flange 21 and a second flange 22. The first flange 21 and the second flange 22 are arranged perpendicular to each other, the first flange 21 is docked on the connecting ring 13, and the first flange 21 and the connecting ring 13 are fixedly connected together by a plurality of bolts 23 that cross the two. The housing 20 of the main reducer The motor 30 and the bridge package 11 enclose a space so that the transmission shaft, gears and differential inside the main reducer can be accommodated in the space; the motor 30 includes a first end 31 and a second end 32 opposite to the first end 31, the output shaft of the motor 30 passes through the first end 31, the first end 31 is docked on the second flange 22, and the first end 31 and the second flange 22 are fixedly connected together by a plurality of bolts 24 that cross the two, after the first end 31 and the second flange 22 are fixed, the output shaft of the motor 30 passes through the second flange 22 and extends into the above-mentioned space, so that the output shaft of the motor 30 is connected to the main reducer, and the output shaft of the motor 30 is arranged parallel to the length direction of the bridge housing 10. A bracket 40 is arranged between the second end 32 of the motor 30 and the bridge housing 10, one end of the bracket 40 is fixedly connected to the second end 32 of the motor 30, and the other end is fixedly connected to the first flange 21 or the connecting ring 13, and a supporting member is formed between the second end 32 of the motor 30 and the bridge housing 10 through the bracket 40.

[0022] In the above structure of the utility model, the first end 31 of the motor 30 is fixedly connected to the second flange 22 of the main reducer housing 20 by bolts, and the second end 32 of the motor 30 is connected to the bridge housing 10 by a bracket 40. In this way, the two ends of the motor 30 are fixedly matched with the bridge housing 10 indirectly or directly, so that the bridge housing 10 provides better support for the motor. During the driving of the vehicle, the vibration amplitude of the motor can be reduced to avoid collision between the motor 30 and other components of the vehicle chassis. At the same time, the probability of resonance between the vehicle vibration and the motor vibration on different road surfaces is reduced, thereby achieving better protection effect on the motor and improving the service life of the electric drive axle.

[0023] In a preferred embodiment, the bracket 40 includes an end plate 43 fixedly connected to the second end 32 of the motor 30, a connecting plate 41, and a support arm 42. The connecting plate 41 is fixedly connected to the first flange 21 or the connecting ring 13 by a connecting bolt 45. For example, the connecting bolt 45 can be used to cross the connecting plate 41, the first flange 21 and the connecting ring 13 to fix the connecting plate 41, the first flange 21 and the connecting ring 13 together. One end of the support arm 42 is fixedly connected to the end plate 43 and the other end is fixedly connected to the connecting plate 41. In this way, the second end 32 of the motor 30 is fixedly connected to the bridge housing 10 by using the bracket 40, so that the bracket 40 provides support for the motor 30 at the second end 32 of the motor 30. To facilitate installation, a plurality of long holes 423 are provided at one end of the support arm 42, and the extension direction of the plurality of long holes 423 is consistent with the axial direction of the motor 30. A fastening bolt 44 is passed through the long hole 423, and the fastening bolt 44 is screwed on the end plate 44 after passing through the long hole 423, and one end of the support arm 42 is pressed against the end plate 43 by the nut of the fastening bolt 44; during assembly, the first end 31 of the motor 30 is first fixed to the second flange 22 by the bolt 24, and then the connecting plate 41 is fixedly connected to the first flange 21 and the connecting ring 13 by the connecting bolt 45, and finally, the fastening bolt 44 is passed through the long hole 423 and then screwed on the end plate 44. By providing the long hole 423, the fastening bolt 44 can pass through the long hole 423 and be screwed in the bolt hole on the end plate 44, so as to prevent the problem that the fastening bolt 44 is difficult to install due to the assembly error in the axial direction of the motor 30.

[0024] In order to make the bracket 40 have better strength and thus better support the motor 30, the above-mentioned support arm 42 includes a support plate 421 welded and fixed on the connecting plate 41, and a reinforcing rib plate 422, and two adjacent sides of the reinforcing rib plate 422 are respectively welded and fixed on the support plate 421 and the connecting plate 41, and a plurality of long holes 423 are opened on the support plate 421.

[0025] In the utility model, the bracket 40 is used to provide support for the motor 30 below the second end 32 of the motor 30. Specifically, one end of the support plate 421 with the long hole 423 is located below the end plate 43. In this way, the support arm 42 is connected to the bottom of the second end 32 of the motor 30 to provide support for the motor 40 below the second end 32 of the motor 30, so as to achieve the purpose of reducing the vibration of the motor 40.

[0026] A connecting plate 33 protruding radially outward along the motor 30 is provided on the first end 31 of the motor 30, and the connecting plate 33 is docked on the second flange 22. A plurality of bolts 24 are passed through the connecting plate 33 and the second flange 22 to fix the first end 31 of the motor 30 to the second flange 22. The plurality of bolts 24 are arranged around the circumference of the motor 30.

[0027] The electric drive axle of the utility model includes the above-mentioned motor mounting structure of the electric drive axle. Other structures of the electric drive axle are the same as those in the prior art and will not be described in detail here.

[0028] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. The motor mounting structure of the electric drive axle is characterized by: It includes a bridge housing, a motor, and a main reducer. The bridge housing includes a bridge pack located in the middle thereof, two bridge tubes located on both sides of the bridge pack, an opening is provided on the bridge pack, and a connecting ring is formed at the periphery of the opening. The main reducer includes a housing, a first flange and a second flange perpendicular to the first flange are provided on the housing, and the first flange is docked on the connecting ring and fixed to the connecting ring by bolts. The motor includes a first end and a second end opposite to the first end. The output shaft of the motor passes through the first end. The first end is docked on the second flange and fixed to the second flange so that the output shaft is parallel to the length direction of the bridge housing. A bracket is arranged between the second end of the motor and the bridge housing. One end of the bracket is fixedly connected to the second end of the motor, and the other end is fixedly connected to the first flange or the connecting ring.

2. The motor mounting structure of the electric drive axle according to claim 1, characterized in that: The bracket includes an end plate fixedly connected to the second end of the motor, a connecting plate fixed to the first flange or the connecting ring by connecting bolts, and a support arm, one end of the support arm is fixed to the end plate and the other end is fixed to the connecting plate.

3. The motor mounting structure of the electric drive axle according to claim 2, characterized in that: One end of the support arm is provided with a plurality of long holes extending in the same direction as the axial direction of the motor, and fastening bolts are inserted into the long holes. The fastening bolts are screwed to the end plate after passing through the long holes to press one end of the support arm onto the end plate through the nuts of the fastening bolts.

4. The motor mounting structure of the electric drive axle according to claim 3, characterized in that: The support arm comprises a support plate welded and fixed on the connecting plate, and a reinforcing rib plate, two adjacent sides of the reinforcing rib plate are respectively welded and fixed on the support plate and the connecting plate, and a plurality of long holes are arranged on the support plate.

5. The motor mounting structure of the electric drive axle according to claim 4, characterized in that: One end of the support plate with the long hole is located below the end plate so that the support arm supports the second end of the motor below the motor.

6. The motor mounting structure of the electric drive axle according to claim 1, characterized in that: The first end of the motor is provided with a connecting plate protruding outwardly in the radial direction of the motor. The connecting plate is butted against the second flange and fixed to the second flange by a plurality of bolts arranged along the circumference of the motor.

7. Electric drive axle, characterized in that: A motor mounting structure for an electric drive axle comprising any one of claims 1-6.

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