Electric drive axle and vehicle

Abstract

The utility model relates to the technical field of electric drive axles, in particular to an electric drive axle and a vehicle, which comprise an electric assembly and an axle housing, the electric assembly comprises a first housing and a second housing, a part of the first housing and a part of the second housing form a fixed part, a part of the first housing and a part of the second housing form a cantilever part, the fixed part is fixed on the axle housing, and the cantilever part is fixed on the axle housing. The fixing part and the cantilever part are sequentially arranged in the first direction, the first shell and the second shell define a preset space for containing a transmission mechanism, the first shell and the second shell are sequentially arranged in the second direction and connected together, an included angle is formed between the first direction and the second direction, and the axle housing is provided with a mounting channel penetrating in the first direction. The fixing part is arranged in the mounting channel in a penetrating mode, and the cantilever part protrudes out of the mounting channel. According to the electric drive axle, the included angle is formed between the connecting direction of the two shells and the extending direction of the cantilever part formed by the two shells, the connecting rigidity of the two shells of the electric assembly is improved, and therefore the reliability of the electric drive axle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric drive bridges, in particular to an electric drive bridge and a vehicle. Background Art

[0002] The electric drive axle is a device that uses an electric assembly to provide power to the wheels to drive the vehicle. The electric assembly consists of a motor, a reduction mechanism, a differential, and a housing that accommodates these components. The electric assembly is usually integrated into the axle housing to improve transmission efficiency and integration.

[0003] The layout and installation method of the electric assembly on the bridge housing is one of the important factors that affect the stiffness of the electric assembly itself and the drive axle. In the related art, the electric assembly is installed on the bridge housing and partially suspended to form a cantilever structure. The cantilever part is bent by external force, and the bending direction is perpendicular to the extension direction of the cantilever part. The connection surface of the two main housings of the electric assembly is also perpendicular to the extension direction of the cantilever part. The internal stress caused by the bending moment of the cantilever part produces stress concentration on the connection surface of the two main housings, which weakens the connection stiffness of the two housings and thus affects the reliability and life of the electric drive axle. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose an electric drive bridge that can improve the connection stiffness of two housings of the electric assembly and improve the reliability and life of the electric drive bridge.

[0005] The utility model provides an electric drive bridge, including an electric assembly and a bridge housing, the electric assembly including a first housing and a second housing, part of the first housing and part of the second housing are configured as a fixed portion, and part of the first housing and part of the second housing are configured as a cantilever portion; the fixed portion is fixed to the bridge housing, and the fixed portion and the cantilever portion are sequentially arranged in a first direction; the first housing and the second housing are enclosed to form a predetermined space for accommodating a transmission mechanism, the first housing and the second housing are sequentially arranged and connected together in a second direction, and an angle is formed between the first direction and the second direction; the bridge housing has an installation channel penetrating along the first direction, the fixed portion is penetrated in the installation channel, and the cantilever portion protrudes out of the installation channel.

[0006] The utility model further provides a vehicle, comprising the electric drive axle.

[0007] The electric drive axle provided by the utility model has a bridge housing with an installation channel penetrating along a first direction, and a portion of the first housing and a portion of the second housing of the electric assembly are constructed as a fixed portion that passes through the installation channel and is fixed on the bridge housing. At the same time, a portion of the first housing and a portion of the second housing of the electric assembly are constructed as a cantilever portion, the cantilever portion protrudes out of the installation channel, and the fixed portion and the cantilever portion form a cantilever structure.

[0008] The first shell and the second shell of the electric assembly are sequentially arranged and connected together along the second direction, and the two shells enclose a predetermined space for accommodating the transmission mechanism, that is, the two shells of the electric assembly are connected side by side in the second direction.

[0009] Since the two shells of the electric assembly are enclosed and connected together, the parts of the first shell and the second shell fixed on the bridge housing together constitute the fixed part of the electric assembly, and the parts of the first shell and the second shell suspended on the bridge housing together constitute the cantilever part of the electric assembly; the fixed part and the cantilever part are arranged in sequence in the first direction, and the entire electric assembly forms a cantilever structure on the bridge housing. The cantilever part of the cantilever structure is a free end, and the free end is easily affected by external forces. The cantilever structure formed by the electric assembly of the electric drive bridge provided by the utility model is mainly affected by the bending moment and bends, and the bending direction is perpendicular to the extension direction of the cantilever part. That is, the extension direction of the cantilever part is the first direction.

[0010] An angle is formed between the first direction and the second direction, rather than being in the same direction, that is, the two shells of the electric assembly are not connected together in the extension direction of the cantilever part, that is, the connection surface of the two shells is not perpendicular to the extension direction of the cantilever part. Then, the internal stress caused by the bending moment on the cantilever part will not appear as stress concentration on the connection surface of the two shells, thereby improving the connection stiffness of the two shells of the electric assembly and further improving the reliability and life of the electric drive axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0012] Figure 1 It is a schematic diagram of an electric drive bridge provided by an embodiment of the utility model;

[0013] Figure 2 This is a schematic diagram of the axle housing and electric assembly of the electric drive axle provided in the embodiment of the utility model. Figure 1 ;

[0014] Figure 3 This is a schematic diagram of the axle housing and electric assembly of the electric drive axle provided in the embodiment of the utility model. Figure 2 ;

[0015] Figure 4 It is a schematic diagram of an electric assembly of an electric drive axle provided in an embodiment of the utility model;

[0016] Figure 5 It is a transmission schematic diagram of the electric drive axle provided by the embodiment of the utility model;

[0017] Figure 6 It is a schematic diagram of a first housing of an electric assembly of an electric drive axle provided in an embodiment of the utility model;

[0018] Figure 7 yes Figure 6 A magnified view of part A;

[0019] Figure 8 It is a schematic diagram of a second housing of an electric assembly of an electric drive axle provided in an embodiment of the utility model;

[0020] Fig. 9 It is a schematic diagram of the annular connection block of the electric drive bridge provided in an embodiment of the utility model.

[0021] Reference numerals:

[0022] 100, bridge housing; 101, mounting channel; 102, first connecting portion; 1021, first end surface; 1022, second end surface;

[0023] 200, electric assembly; 201, first housing; 202, second housing;

[0024] 203, fixed portion; 204, cantilever portion; 2041, first sub-portion; 2042, second sub-portion;

[0025] e1, first direction; e2, second direction;

[0026] 205, a first motor; 206, a second motor;

[0027] 207, first planetary reducer; 208, second planetary reducer; 209, differential;

[0028] 210, second connection portion; 2101, lug; 2102, first mounting hole; 2103, second mounting hole;

[0029] 300, annular connection block; 301, third mounting hole; 302, fourth mounting hole;

[0030] 400, first fastener group; 500, second fastener group; 600, third fastener group;

[0031] 700. Wheel. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0035] In the description of the present invention, "multiple" means two or more, and "several" means one or more.

[0036] An embodiment of the utility model provides an electric drive bridge, including an electric assembly 200 and a bridge housing 100, the electric assembly 200 includes a first housing 201 and a second housing 202, part of the first housing 201 and part of the second housing 202 are configured as a fixed portion 203, and part of the first housing 201 and part of the second housing 202 are configured as a cantilever portion 204; the fixed portion 203 is fixed on the bridge housing 100, and the fixed portion 203 and the cantilever portion 204 are arranged in sequence in a first direction e1; the first housing 201 and the second housing 202 enclose a predetermined space for accommodating a transmission mechanism.

[0037] Considering the flexibility of the layout of the electric assembly 200 on the bridge housing 100 and the optimization of the space, and also in order to reduce the weight of the drive axle, the electric assembly 200 is usually not fully supported and fixed on the bridge housing 100, but is usually partially suspended or completely suspended and fixed on the bridge housing 100 to form a cantilever structure. The installation part of the electric assembly 200 and the bridge housing 100 is the fixed end, and the part of the electric assembly 200 suspended on the bridge housing 100 is the cantilever part 204. The cantilever part 204 will bend when subjected to external force, thereby generating a bending moment. The first housing 201 and the second housing 202 of the related art are connected in sequence in the extension direction of the cantilever part 204, that is, the first direction e1. The connection surface of the two housings is perpendicular to the bending direction of the cantilever part 204. The internal stress caused by the bending moment on the cantilever part 204 forms a stress concentration on the connection surface of the two housings, weakening the connection stiffness of the two housings.

[0038] Among them, the external forces acting on the cantilever part 204 mainly include bending moment, shear force, axial force and torque. The present invention only considers the influence of the bending moment on the force of the cantilever part 204 .

[0039] Based on this, in the electric drive bridge provided by the embodiment of the utility model, the first shell 201 and the second shell 202 are sequentially arranged and connected together in the second direction e2, and an angle is formed between the first direction e1 and the second direction e2.

[0040] In the electric drive bridge provided by the utility model, the cantilever structure includes a fixing portion 203 and a cantilever portion 204, and the cantilever portion 204 is a free end, which is easily bent by an external force, thereby generating a bending moment. The first housing 201 and the second housing 202 are sequentially connected in the second direction e2, and the fixing portion 203 and the cantilever portion 204 are sequentially arranged in the first direction e1, and an angle is arranged between the first direction e1 and the second direction e2, that is, the connection direction of the first housing 201 and the second housing 202 is not the same as the extension direction of the cantilever portion 204, so that the connection surface of the first housing 201 and the second housing 202 is not perpendicular to the extension direction of the cantilever portion 204, ensuring that the internal stress caused by the bending moment on the cantilever portion 204 will not appear on the connection surface of the first housing 201 and the second housing 202. Stress concentration and deformation will occur, thereby improving the connection stiffness of the first housing 201 and the second housing 202 of the electric assembly 200 fixed on the bridge housing 100.

[0041] It should be noted that the angle formed by the first direction e1 and the second direction e2 in this embodiment is not zero.

[0042] The bridge housing 100 includes a disconnected bridge housing 100 and an integral bridge housing 100. In the related art using the disconnected bridge housing 100, the bridge housing 100 includes a left bridge housing 100 and a right bridge housing 100, and the left bridge housing 100, the electric assembly 200 and the right bridge housing 100 are sequentially arranged in the second direction e2. Since the rigidity of the disconnected bridge housing 100 itself is not as good as that of the integral bridge housing 100, the electric drive bridge provided by the utility model adopts an integral bridge housing 100, which can improve the overall rigidity and life of the electric drive bridge.

[0043] Among them, there are multiple installation methods for the electric assembly 200 to form a cantilever structure on the bridge housing 100. The electric assembly 200 can be straddled on the bridge housing 100, can be suspended on the bridge housing 100, or can be inserted into the bridge housing 100. Since it is straddled on the bridge housing 100, the center of gravity of the electric assembly 200 will be too high, affecting the stability of the vehicle, and also increasing the height of the electric drive bridge, which is not conducive to the arrangement of the electric drive bridge on the whole vehicle. The electric assembly 200 is suspended on the bridge housing 100, and the installation requires an additional suspension bracket, and the structural rigidity and strength of the suspension are weak, which is not conducive to the reliability and life of the electric drive bridge. In this embodiment, the fixing part 203 of the electric assembly 200 is inserted into the bridge housing 100, and the electric assembly 200 is closely combined with the bridge housing 100, making the entire electric drive bridge structure more compact, which is conducive to optimizing the spatial layout of the vehicle and improving the space utilization rate. More importantly, the installation method of the fixing part 203 inserted into the bridge housing 100 can enhance the rigidity and stability of the overall structure of the drive bridge.

[0044] In some embodiments of the electric drive bridge provided by the present invention, the angle between the first direction e1 and the second direction e2 is 90°, that is, the connection direction of the fixed part 203 and the cantilever part 204 is perpendicular to the connection direction of the first shell 201 and the second shell 202, so that the connection direction of the fixed part 203 and the cantilever part 204 is parallel to the connection surface of the two shells, ensuring that the bending moment component borne on the cantilever part 204 perpendicular to the connection surface of the two shells is 0, avoiding the influence of the bending moment on the connection stiffness of the first shell 201 and the second shell 202, and is more conducive to improving the connection stiffness of the first shell 201 and the second shell 202 fixed on the bridge shell 100 and the stiffness of the entire electric drive bridge.

[0045] In some embodiments of the electric drive bridge provided by the present utility model, the cantilever portion 204 includes a first sub-portion 2041 and a second sub-portion 2042 spaced apart in the first direction e1, and the fixing portion 203 is disposed between the first sub-portion 2041 and the second sub-portion 2042 .

[0046] In this embodiment, the cantilever portion 204 is divided into two spaced-apart sub-portions, and the two spaced-apart sub-portions are respectively located on both sides of the bridge housing 100, thereby reducing the length of a single cantilever portion 204, that is, reducing the cantilever length of the cantilever structure, thereby reducing the bending moment borne by the cantilever portion 204, which is more conducive to improving the stiffness of the electric assembly 200, that is, the entire electric drive bridge.

[0047] In some embodiments of the electric drive axle provided by the present invention, the first sub-section 2041 includes a first motor 205 , and the second sub-section 2042 includes a second motor 206 .

[0048] When the vehicle requires greater power, a high-power motor is required to make the drive axle have greater power output. As the motor power increases, the size and weight of the motor also increase. The single-motor electric assembly 200 is arranged on the bridge housing 100, and it is difficult to arrange the forces of the electric assembly 200 and the bridge housing 100 in a balanced manner. The single-motor electric drive axle also lacks flexibility in power distribution and cannot adjust the power output and power distribution according to the vehicle's driving state and real-time road conditions. The dual-motor electric drive axle can reasonably arrange the two motors on both sides of the bridge housing 100, so that the electric assembly 200 itself is balanced, the connection stiffness of the two shells of the electric assembly 200 is improved, and the bridge housing 100 is balanced, and the force stability of the drive axle is improved. The dual-motor electric drive axle can also adjust the power output and power distribution of the two motors according to the vehicle's driving state and real-time road conditions, so that the electric drive axle has better power and economy. Therefore, when the electric assembly 200 is a dual-motor electric assembly 200, for example, the dual motors are respectively a first motor 205 and a second motor 206, when the electric assembly 200 is set on the bridge housing 100, the first motor 205 and the second motor 206 are respectively installed on both sides of the bridge housing 100, which can make the electric assembly 200 balanced in force, thereby improving the strength, rigidity of the electric assembly 200 and the reliability of the entire electric drive bridge.

[0049] When the first motor 205 and the second motor 206 are respectively arranged on both sides of the bridge housing 100, there are also many ways to arrange the two in detail. If the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are arranged to intersect, for example, it is common that the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are perpendicular, that is, the first motor 205 is axially arranged in the first direction e1, and the second motor 206 is axially arranged in the second direction e2, it is also possible to achieve the power coupling of the two motors and transmit the coupled power to the differential 209 to drive the vehicle. However, to achieve the coupling of power in two directions that are perpendicular to each other, a bevel gear pair needs to be set, which is not conducive to the utilization of the internal space of the electric assembly 200, that is, the electric assembly 200 may become larger in size and weight, which affects the rigidity of the electric assembly 200 and the bridge housing 100 to a certain extent.

[0050] Therefore, in some embodiments of the electric drive bridge provided by the present invention, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are arranged in parallel or in a colinear manner. For example, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are both arranged along the first direction e1 and the two are not colinear, or, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are both arranged along the first direction e1 and the two are colinear, or, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are both arranged along the second direction e2, which are beneficial to the reasonable arrangement of the reduction mechanism and the power coupling mechanism for transmitting the power of the two motors to the wheel 700, thereby optimizing the volume and weight of the electric assembly 200, and are beneficial to improving the connection stiffness of the two shells of the electric assembly 200, the stiffness of the electric assembly 200 itself and the stiffness of the bridge housing 100.

[0051] In some further embodiments, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are both arranged along the first direction e1 and are not collinear, or, the rotating shaft of the first motor 205 and the rotating shaft of the second motor 206 are both arranged along the first direction e1 and are collinear. However, both arrangements increase the size of the first motor 205, the second motor 206 and the electric assembly 200 in the first direction e1, increase the length of the first subsection 2041 and the second subsection 2042 of the cantilever portion 204, increase the cantilever length of the cantilever structure, increase the bending moment borne by the first subsection 2041 and the second subsection 2042, and reduce the stiffness of the first subsection 2041 and the second subsection 2042 of the cantilever portion 204.

[0052] Therefore, in some preferred embodiments, the rotating shaft of the first motor 205 is parallel to the rotating shaft of the second motor 206, and the rotating shafts of the first motor 205 and the second motor 206 are arranged along the second direction e2. As a result, the first sub-portion 2041 and the second sub-portion 2042 of the cantilever portion 204 are smaller in size in the first direction e1, the cantilever length of the cantilever portion 204 is shortened, and the stiffness of the electric assembly 200 and the stiffness of the bridge housing 100 are improved.

[0053] In some embodiments of the electric drive axle provided by the present invention, the electric assembly 200 also includes a first planetary reducer 207, a second planetary reducer 208 and a differential 209 suitable for being connected to the wheel 700 in transmission, the first motor 205, the first planetary reducer 207 and the differential 209 are connected in transmission in sequence, and the second motor 206, the second planetary reducer 208 and the differential 209 are connected in transmission in sequence.

[0054] The compact structure of the planetary reducer determines that it can achieve a larger transmission ratio. Compared with parallel shaft reducers or reducers of other structures, under the same transmission ratio setting, the planetary reducer is smaller in size and lighter in weight, which can optimize the volume and weight of the electric assembly 200. The weight is reduced, and the gravity bending moment is reduced, which is conducive to improving the overall stiffness of the electric assembly 200 itself and the electric drive axle. The planetary reducer can also withstand greater impact forces and loads, further improving the life of the electric drive axle.

[0055] In this embodiment, Figure 5 As shown, the first motor 205, the first planetary reducer 207 and the differential 209 are sequentially connected in driving, and the second motor 206, the second planetary reducer 208 and the differential 209 are sequentially connected in driving. The power from the first motor 205 is transmitted to the differential 209 through the first planetary reducer 207, and the power from the second motor 206 is transmitted to the differential 209 through the second planetary reducer 208. The differential 209 couples the power from the first motor 205 and the second motor 206 and transmits them to the left and right wheels 700, realizing the function of the electric drive axle driving the vehicle.

[0056] In some embodiments of the electric drive bridge provided by the utility model, the electric drive bridge also includes two first connection parts 102 arranged on the bridge housing 100 and two second connection parts 210 arranged on the fixed part 203, the two first connection parts 102 and the two second connection parts 210 are fixedly connected in a one-to-one correspondence, and the first sub-part 2041, the two second connection parts 210 and the second sub-part 2042 are arranged sequentially in the first direction e1.

[0057] In this embodiment, the two first connection parts 102 provided on the bridge housing 100 and the two second connection parts 210 provided on the fixed part 203 of the electric assembly 200 are fixedly connected one by one, that is, the electric assembly 200 and the bridge housing 100 are connected and fixed at two places, respectively shortening the length of the first sub-part 2041 and the second sub-part 2042 of the cantilever part 204 of the electric assembly 200, which is equivalent to shortening the cantilever length of the cantilever structure, so that the bending moment of the first sub-part 2041 and the second sub-part 2042 are reduced, and the stiffness of the electric assembly 200 itself and the electric drive bridge is improved. At the same time, the two places of connection and fixation between the electric assembly 200 and the bridge housing 100 are compared with only one fixed connection, which also improves the connection reliability of the electric assembly 200 and the bridge housing 100.

[0058] In some embodiments of the electric drive axle provided by the present invention, the distance from the rotating shaft of the first motor 205 to the adjacent second connection portion 210 is L1, and the distance from the rotating shaft of the second motor 206 to the adjacent second connection portion 210 is L2, L1:L2=0.9~1.1.

[0059] In this embodiment, the bending moment of the cantilever part 204 comes from the bending moment generated by the weight of the cantilever part 204 itself and the component of the supporting reaction force from the fixed part 203. The ratio of the distance from the rotating shaft of the first motor 205 to the adjacent second connecting part 210 and the distance from the rotating shaft of the second motor 206 to the adjacent second connecting part 210 is between 0.9 and 1.1, that is, the two are approximately equal, so that the force arms of the gravity bending moment borne by the first sub-part 2041 of the cantilever part 204 including the first motor 205 and the second sub-part 2042 of the cantilever part 204 including the second motor 206 are approximately equal, and then the bending moments borne by the first sub-part 2041 and the second sub-part 2042 are close to each other to the greatest extent, ensuring the balanced distribution of the forces of the electric assembly 200 and the bridge housing 100, and the overall structure of the electric drive bridge is more stable.

[0060] Furthermore, in this embodiment, the first motor 205 and the second motor 206 have the same specifications. It should be noted that the same specifications refer to that the first motor 205 and the second motor 206 have the same technical parameters such as size, power, external characteristics, etc. Figures 1 to 4 As shown, the reduction mechanism for transmitting the power output by the first motor 205 and the second motor 206 to the wheel 700 can be set to be the same. Preferably, in order to further reduce the outline size of the electric assembly 200 in the second direction e2, the first motor 205 and the second motor 206 are nearly symmetrically arranged on both sides of the bridge housing 100, that is, the first sub-section 2041 and the second sub-section 2042 of the cantilever portion 204 are nearly symmetrically distributed on both sides of the fixed portion 203, the weight of the first sub-section 2041 and the second sub-section 2042 are equal, and the force arms of the first sub-section 2041 and the second sub-section 2042 under the gravity bending moment are equal. Therefore, the gravity bending moment borne by the first sub-section 2041 and the second sub-section 2042 is equal, and the force of the electric assembly 200 and the bridge housing 100 is evenly distributed, so that the overall structure of the electric drive bridge is more stable, and the strength, rigidity and life of the electric drive bridge are improved.

[0061] On the other hand, the first motor 205 and the second motor 206 have the same power, external characteristics, etc., which also makes the control of the first motor 205 and the second motor 206 simpler.

[0062] The electric assembly 200 is inserted into the installation channel 101 of the bridge housing 100 . There are many installation methods to fix the electric assembly 200 on the bridge housing 100 .

[0063] In the electric drive axle provided by the embodiment of the utility model, the electric assembly 200 and the bridge housing 100 can be fixed in the following manner: one of the first connecting parts 102 includes a first end face 1021, and one end opening of the installation channel 101 is opened on the first end face 1021; one of the second connecting parts 210 includes a lug 2101 arranged around the outer wall of the electric assembly 200, and the lug 2101 abuts against the first end face 1021 and is fixed to the first end face 1021 through the first fastener group 400. The lug 2101 arranged around the outer wall of the electric assembly 200 can not only play a role in connecting the electric assembly 200 and the first end face 1021 of the bridge housing 100, but also play a role in limiting the electric assembly 200 when the electric assembly 200 penetrates the installation channel 101 of the bridge housing 100, thereby improving the assembly accuracy and the convenience of assembly operation. In addition, the annular lug 2101 is equivalent to a reinforcing rib on the housing of the electric assembly 200 , which can improve the rigidity and strength of the first housing 201 and the second housing 202 .

[0064] The electric drive bridge provided by the embodiment of the utility model, the electric assembly 200 and the bridge housing 100 can also be fixed in the following manner: the bridge housing 100 also includes at least one annular connecting block 300, at least one of the first connecting parts 102 includes a second end face 1022, the annular connecting block 300 is arranged on the second end face 1022, and the opening of the mounting channel 101 is opened on the second end face 1022; at least one of the second connecting parts 210 includes a second mounting hole 2103 arranged on the outer wall of the electric assembly 200, the annular connecting block 300 is arranged around the electric assembly 200, and the annular connecting block 300 is fixed to the electric assembly 200 by a second fastener group 500 penetrated through the second mounting hole 2103; the annular connecting block 300, the first connecting part 102 and the second connecting part 210 correspond to each other one by one and are equal in number.

[0065] In this embodiment, the electric assembly 200 can be installed and fixed together by means of an annular connecting block 300 and a group of second mounting holes 2103, and the electric assembly 200 can also be installed and fixed together by means of two annular connecting blocks 300 and two groups of second mounting holes 2103. Specifically, one annular connecting block 300 or two annular connecting blocks 300 can be selected for fixation based on factors such as the self-weight of the electric assembly 200 and its specific structure.

[0066] In order to fix the electric assembly 200 on the bridge housing 100, mounting holes can also be directly set on the outer peripheral wall of the mounting channel 101 of the bridge housing 100, and corresponding mounting holes are arranged on the outer peripheral wall of the electric assembly 200, and the electric assembly 200 is connected and fixed to the bridge housing 100 by fasteners. However, this direct fixing method has the following problems: the outer peripheral walls of the mounting channel 101 of the bridge housing 100 are all forged or cast surfaces, and the surface quality such as the flatness of the non-machined surface is poor, which cannot meet the requirements of the fastener installation on the mounting surface; in addition, in order to enable the electric assembly 200 to pass through the mounting channel 101, there is a certain gap between the outer wall of the electric assembly 200 and the mounting channel 101, and the inner wall surface of the mounting channel 101 is also a forged or cast surface, and the non-machined surface has poor flatness, which makes it inconvenient to achieve the fitting installation of the outer wall of the electric assembly 200 and the inner wall of the mounting channel 101. Even if it is installed in this way, the connection is unreliable. In this embodiment, the second end face 1022 and the second mounting hole 2103 are connected by the annular connecting block 300, thereby avoiding the non-machined surface from participating in the connection, improving the connection quality, and Figures 1 to 3 The electric assembly 200 and the bridge housing 100 are connected by two sets of fasteners installed transversely and longitudinally, which greatly improves the connection strength and connection reliability.

[0067] The electric drive axle provided in the embodiment of the utility model is preferably fixed to the electric assembly 200 and the bridge housing 100 in the following manner: one of the first connecting parts 102 includes a first end face 1021, and the first end opening of the installation channel 101 is opened on the first end face 1021; one of the second connecting parts 210 includes a lug 2101 arranged around the outer wall of the electric assembly 200, and the lug 2101 abuts against the first end face 1021 and is fixed to the first end face 1021 through a fastener; the bridge housing 100 also includes an annular connecting block 30 0, wherein the other first connection portion 102 includes a second end face 1022, the annular connection block 300 is arranged on the second end face 1022, and the second end opening of the mounting channel 101 is opened on the second end face 1022; wherein the other second connection portion 210 includes a second mounting hole 2103 arranged on the outer wall of the electric assembly 200, the annular connection block 300 is arranged around the electric assembly 200, and the annular connection block 300 is fixed to the electric assembly 200 by a second fastener group 500 penetrating through a plurality of second mounting holes 2103.

[0068] In this embodiment, if Figures 1 to 3As shown, the first connection part 102 on the bridge housing 100 includes a first end face 1021 and a second end face 1022, and the second connection part 210 on the electric assembly 200 includes a lug 2101 arranged on the outer wall of the electric assembly 200 and a second mounting hole 2103 arranged on the outer wall of the electric assembly 200, and the lug 2101 is provided with a first mounting hole 2102, and the first fastener group 400 passes through the first mounting hole 2102 to fix the lug 2101 to the first end face 1021, the third fastener group 600 passes through the third mounting hole 301 to fix the annular connection block 300 to the second end face 1022, and the second fastener group 500 passes through the fourth mounting hole 302 to connect and fix the annular connection block 300 in the second mounting hole 2103, thereby realizing the installation and fixation of the electric assembly 200 on the bridge housing 100. Among them, the third mounting hole 301 passes through the annular connecting block 300 along the first direction e1, one end opening of the fourth mounting hole 302 is set on the surface of the annular connecting block 300 away from the electric assembly 200, and the other end opening of the fourth mounting hole 302 is set on the surface of the side where the annular connecting block 300 is in contact with the outer wall of the electric assembly 200.

[0069] Compared with being fixedly connected by a single connection part, such as a lug 2101 or an annular connection block 300, the electric assembly 200 and the bridge housing 100 are fixedly connected by two connection parts, so the connection strength and rigidity are higher and the connection is more stable and reliable.

[0070] Since the lug 2101 arranged on the outer wall of the electric assembly 200 can play a limiting role in the installation of the electric assembly 200 in the installation channel 101 of the bridge housing 100, the installation positioning is more convenient and the installation efficiency is higher. Therefore, the method of fixing the electric assembly 200 and the bridge housing 100 at two connecting parts by the lug 2101 and the annular connecting block 300 is better than the method of fixing the two at two connecting parts by two annular connecting blocks 300.

[0071] The embodiment of the utility model further provides a vehicle, comprising the above-mentioned drive axle. The vehicle provided by this embodiment has the related beneficial effects of the drive axle, which will not be described in detail here.

[0072] In the description of this specification, the description with reference to the terms "specific embodiment", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0073] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An electric drive bridge, characterized in that: It comprises an electric assembly (200) and a bridge housing (100); The electric assembly (200) comprises a first housing (201) and a second housing (202), wherein a portion of the first housing (201) and a portion of the second housing (202) are configured as a fixed portion (203), and a portion of the first housing (201) and a portion of the second housing (202) are configured as a cantilever portion (204); the fixed portion (203) is fixed to the bridge housing (100), and the fixed portion (203) and the cantilever portion (204) are sequentially arranged in a first direction (e1); The first shell (201) and the second shell (202) are enclosed to form a predetermined space for accommodating the transmission mechanism; the first shell (201) and the second shell (202) are sequentially arranged and connected together in a second direction (e2); an angle is formed between the first direction (e1) and the second direction (e2); The bridge housing (100) has a mounting channel (101) penetrating along a first direction (e1), the fixing portion (203) is disposed in the mounting channel (101), and the cantilever portion (204) protrudes out of the mounting channel (101).

2. The electric drive axle according to claim 1, characterized in that: The first direction (e1) is perpendicular to the second direction (e2).

3. The electric drive axle according to claim 2, characterized in that: The cantilever portion (204) comprises a first sub-portion (2041) and a second sub-portion (2042) which are arranged at intervals in the first direction (e1), and the fixing portion (203) is arranged between the first sub-portion (2041) and the second sub-portion (2042).

4. The electric drive axle according to claim 3, characterized in that: The first subsection (2041) includes a first motor (205), and the second subsection (2042) includes a second motor (206).

5. The electric drive axle according to claim 4, characterized in that: The rotating shaft of the first motor (205) and the rotating shaft of the second motor (206) are on the same line, or the rotating shaft of the first motor (205) and the rotating shaft of the second motor (206) are parallel.

6. The electric drive axle according to claim 5, characterized in that: The rotating shaft of the first motor (205) and the rotating shaft of the second motor (206) are parallel, and the rotating shaft of the first motor (205) and the rotating shaft of the second motor (206) both extend along the second direction (e2).

7. The electric drive axle according to claim 4, characterized in that: The electric assembly (200) further comprises a first planetary reducer (207), a second planetary reducer (208) and a differential (209) adapted to be transmission-connected to the wheel (700); the first motor (205), the first planetary reducer (207) and the differential (209) are transmission-connected in sequence; and the second motor (206), the second planetary reducer (208) and the differential (209) are transmission-connected in sequence.

8. The electric drive axle according to claim 3, characterized in that: It also includes two first connecting parts (102) arranged on the bridge housing (100) and two second connecting parts (210) arranged on the fixing part (203), wherein the two first connecting parts (102) and the two second connecting parts (210) are fixedly connected in a one-to-one correspondence; the first sub-part (2041), the two second connecting parts (210) and the second sub-part (2042) are arranged in sequence in the first direction (e1).

9. The electric drive axle according to claim 8, characterized in that: The first subsection (2041) includes a first motor (205), and the second subsection (2042) includes a second motor (206). The distance from the rotating shaft of the first motor (205) to the adjacent second connecting portion (210) is L1, and the distance from the rotating shaft of the second motor (206) to the adjacent second connecting portion (210) is L2, satisfying: L1:L2=0.9~1.

1.

10. The electric drive axle according to claim 8, characterized in that: One of the first connection parts (102) comprises a first end surface (1021), and one end opening of the installation channel (101) is opened on the first end surface (1021); one of the second connection parts (210) comprises a lug (2101) arranged around the outer wall of the electric assembly (200), and the lug (2101) is in contact with the first end surface (1021) and is fixed to the first end surface (1021) via a first fastener assembly (400); or The bridge housing (100) further comprises at least one annular connection block (300); at least one of the first connection parts (102) comprises a second end face (1022); the annular connection block (300) is arranged on the second end face (1022); the opening of the mounting channel (101) is opened on the second end face (1022); at least one of the second connection parts (210) comprises a second mounting hole (2103) arranged on the outer wall of the electric assembly (200); the annular connection block (300) is arranged around the electric assembly (200), and the annular connection block (300) is fixed to the electric assembly (200) by a second fastener group (500) penetrating the second mounting hole (2103); the annular connection block (300), the first connection part (102) and the second connection part (210) correspond to each other one by one and are equal in number; or One of the first connection parts (102) includes a first end surface (1021), and a first end opening of the installation channel (101) is opened on the first end surface (1021); one of the second connection parts (210) includes a lug (2101) arranged around the outer wall of the electric assembly (200), and the lug (2101) is in contact with the first end surface (1021) and is fixed to the first end surface (1021) by a fastener; the bridge housing (100) further includes an annular connection block (300), and another of the first connection parts (102) includes a second end surface (1 022), the annular connection block (300) is arranged on the second end surface (1022), and the second end opening of the installation channel (101) is opened on the second end surface (1022); wherein another second connection part (210) includes a second installation hole (2103) arranged on the outer wall of the electric assembly (200), the annular connection block (300) is arranged around the electric assembly (200), and the annular connection block (300) is fixed to the electric assembly (200) by a second fastener group (500) penetrating a plurality of the second installation holes (2103).

11. A vehicle, characterized in that: The electric drive axle comprises the electric drive axle according to any one of claims 1 to 10.

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