Electric drive assembly and new energy vehicle

Abstract

The utility model provides an electric drive assembly and a new energy vehicle. The electric drive assembly comprises a drive motor, and a hollow shaft is arranged in the middle of the drive motor; the speed reducer is arranged at the first end of the hollow shaft; the output shaft penetrates through the hollow shaft, the input end of the output shaft is connected with the speed reducer, and the output end of the output shaft and the second end of the hollow shaft are located on the same side of the driving motor; the shell comprises a first shell part and a second shell part which are connected together, the first shell part is arranged on the periphery of the driving motor, the second shell part is arranged on the periphery of the speed reducer, the longitudinal section of the shell is a stepped section, and the height of the longitudinal section of the first shell part is smaller than that of the longitudinal section of the second shell part. According to the electric drive assembly, the shape of a channel in a whole vehicle can be better utilized, vehicle body data do not need to be adjusted, the center of gravity of the vehicle can be optimized, the center of gravity of the vehicle approaches the middle of the vehicle to the maximum extent, and therefore the stability and safety of the vehicle are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to new energy vehicle technical field especially relates to a kind of electric drive assembly and new energy vehicle. BACKGROUND

[0002] Traditional fuel vehicle will produce a large amount of tail gas emissions in combustion process, including carbon dioxide, nitrogen oxides, particulate matter and other pollutants, cause serious impact on the environment.And electric vehicle with electric power as power source, almost no tail gas emissions in driving process, help to improve air quality, reduce environmental pollution.

[0003] Therefore, some fuel version vehicle has electrification reconstruction demand at present.

[0004] In the implementation of the utility model, the inventor finds that there are at least the following problems in the prior art: in the electrification reconstruction process, the front drive rear drive model, the shape of the passage to the output shaft is relatively fixed, the space in the vehicle is generally smaller as closer to the output end of the drive shaft, the existing electric drive assembly cannot fully utilize the existing vehicle passage space, and if it is installed on the vehicle, the vehicle body data needs to be adjusted, which may cause the stability and safety of the vehicle to decrease. UTILITY MODEL CONTENTS

[0005] The utility model aims at solving at least one of the technical problems in the related art to some extent.

[0006] Therefore, the purpose of the utility model is to provide an electric drive assembly and new energy vehicle that can better utilize the vehicle passage space.

[0007] To achieve the above purpose, the utility model provides an electric drive assembly in the first aspect, comprising:

[0008] Drive motor, the middle part of the drive motor is provided with hollow shaft;

[0009] Speed reducer, arranged on the first end of the hollow shaft;

[0010] Output shaft, through the hollow shaft, the input end of the output shaft is connected with the speed reducer, and the output end of the output shaft is located on the same side of the second end of the hollow shaft of the drive motor;

[0011] Shell, including first part shell and second part shell connected together, the first part shell is arranged on the periphery of the drive motor, and the second part shell is arranged on the periphery of the speed reducer, the longitudinal section of the shell is stepped section, and the longitudinal section height of the first part shell is less than the longitudinal section height of the second part shell.

[0012] According to the electric drive assembly, the driving motor and the speed reducer are coaxially arranged, the driving motor is arranged on one side of the output end of the electric drive assembly, the outer dimension of the driving motor is smaller than that of the speed reducer, therefore, the whole electric drive assembly is arranged close to the driving axle, the small-size driving motor is maximally utilized to cooperate with the middle channel of the whole vehicle, the electric drive assembly can better utilize the shape of the middle channel of the whole vehicle, the vehicle body data does not need to be adjusted, the gravity center of the vehicle can be optimized, the gravity center of the vehicle is maximally close to the middle part of the vehicle, and therefore the stability and safety of the vehicle are improved.

[0013] According to an embodiment of the utility model, the speed reducer is a two-stage speed reducer.

[0014] According to an embodiment of the utility model, the speed reducer comprises a first gear to a fourth gear, an intermediate shaft and a first shaft, the first gear is arranged on the hollow shaft, the second gear and the third gear are coaxially arranged on the intermediate shaft, the second gear is engaged with the first gear, the fourth gear is arranged on the first shaft, the fourth gear is engaged with the third gear, and the first shaft is connected with the input end of the output shaft.

[0015] According to an embodiment of the utility model, the first shaft and the input end of the output shaft are connected by means of a spline.

[0016] According to an embodiment of the utility model, the first part shell and the second part shell are integrally formed.

[0017] The utility model discloses a new energy vehicle, including the electric drive assembly, the transmission shaft and the carriage of first aspect, the carriage includes cabin and passenger cabin, the bottom plate of cabin and the bottom plate of passenger cabin junction has the step, the electric drive assembly is adjacent to the vertical surface of the step, the transmission shaft is connected with the output shaft of the electric drive assembly.

[0018] Additional aspects and advantages will be set forth in part in the following description, will become apparent to those skilled in the art from the description, or will be learned from practicing the utility model. BRIEF DESCRIPTION OF DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those skilled in the art. The drawings are only for the purpose of showing the preferred embodiment, and are not considered as limiting the utility model. Moreover, in the whole drawings, the same reference signs represent the same parts. Among them:

[0020] Figure 1 It is the structure schematic drawing of electric drive assembly that an embodiment of the utility model proposes.

[0021] Figure 2 is a structural schematic view of a new energy vehicle according to an embodiment of the present application.

[0022] Mark explanation:

[0023] 1-hollow shaft, 2-driving motor, 3-first shaft, 4-intermediate shaft, 5-output shaft, 7-reducer, 8-transmission shaft, 9-first part shell, 10-second part shell, Z1-Z4 are first to fourth gear. DETAILED DESCRIPTION

[0024] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by reference to the drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application. On the contrary, the embodiments of the present application include all changes, modifications and equivalents falling within the spirit and scope of the appended claims.

[0025] The electric drive assembly according to the embodiments of the present application is described below with reference to Figures 1 to 2 .

[0026] The electric drive assembly according to the embodiments of the present application comprises a driving motor 2, a reducer 7, an output shaft 5 and a shell. The middle part of the driving motor 2 is provided with a hollow shaft 1. The reducer 7 is arranged on the first end of the hollow shaft 1. The output shaft 5 penetrates the hollow shaft 1, the input end of the output shaft 5 is connected with the reducer 7, and the output end of the output shaft 5 is located on the same side of the second end of the hollow shaft 1 of the driving motor 2. The shell comprises a first part shell 9 and a second part shell 10 connected together, the first part shell 9 is arranged on the periphery of the driving motor 2, the second part shell 10 is arranged on the periphery of the reducer 7, the longitudinal section of the shell is a stepped section, and the longitudinal section height of the first part shell 9 is less than that of the second part shell 10.

[0027] The specific type of the driving motor 2 is set according to actual needs, for example, a permanent magnet synchronous motor or an alternating current induction motor. The hollow shaft 1 rotates synchronously with the rotor of the driving motor 2. The first end of the hollow shaft 1 is connected with the rotor of the driving motor 2, and the second end of the hollow shaft 1 is connected with the output end of the output shaft 5. Figure 1The rotational speed of the driving motor 2 is high, and the reducer 7 is used to reduce the speed and increase the torque, so that the driving motor can operate in the high-efficiency range and meet the power demand of vehicle driving. The first part shell 9 and the second part shell 10 can be integrally formed or connected in a split manner. The second part shell 10 can also serve as an end cover of the driving motor 2. The driving motor 2 has a smaller size than the reducer 7, and thus the peripheral size of the first part shell 9 is smaller than that of the second part shell 10. The space in the vehicle tunnel is small, and the smaller size of the first part shell 9 can extend more into the vehicle tunnel, and the stepped shell in the longitudinal section can better approach the vehicle tunnel, which is beneficial to the compact use of the space in the vehicle tunnel.

[0028] According to the electric drive assembly, the driving motor and the reducer are coaxially arranged, the driving motor is arranged on one side of the output end of the electric drive assembly, the driving motor has a smaller size than the reducer, and thus the electric drive assembly is arranged close to the driving axle, the small-size driving motor is maximally used to cooperate with the space in the vehicle tunnel, the electric drive assembly can better use the shape of the vehicle tunnel, the vehicle body data does not need to be adjusted, the vehicle gravity center can be optimized, the vehicle gravity center is maximally close to the middle part of the vehicle, and thus the vehicle stability and safety are improved.

[0029] In some embodiments, as shown in Figure 1 The reducer 7 is a two-stage reducer. The two-stage reducer has a higher reduction ratio and better durability than the single-stage reducer. In one example, the reducer 7 includes first to fourth gears Z1-Z4, an intermediate shaft 4 and a first shaft 3. The first gear Z1 is arranged on the hollow shaft 1, the second gear Z2 and the third gear Z3 are coaxially arranged on the intermediate shaft 4, the second gear Z2 is engaged with the first gear Z1, the fourth gear Z4 is arranged on the first shaft 3, the fourth gear Z4 is engaged with the third gear Z3, and the first shaft 3 is connected with the input end of the output shaft 5. In addition, the reducer further includes a plurality of pairs of bearings, and the specific arrangement position and number are designed according to actual needs, which are not limited herein. The plurality of pairs of bearings can support the hollow shaft 1, the output shaft 5, the intermediate shaft 4 and the first shaft 3, so that these shafts can rotate smoothly.

[0030] The power transmission path is as follows: hollow shaft 1→first gear Z1→second gear Z2→intermediate shaft 4→third gear Z3→fourth gear Z4→first shaft 3→output shaft 5.

[0031] In some embodiments, the first shaft 3 and the input end of the output shaft 5 are connected by means of a spline. The spline connection can withstand a large torque and has high positioning accuracy.

[0032] As shown in Figure 2The utility model discloses an electric drive assembly of a new energy vehicle, which is close to the drive axle, makes full use of the space in the middle of the vehicle, and can realize compact layout.

[0033] The electric drive assembly of the new energy vehicle is close to the drive axle, makes full use of the space in the middle of the vehicle, and can realize compact layout.

[0034] It should be noted that, in the description of the utility model, the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0035] In the utility model, unless otherwise specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection or communication with each other; it can be directly connected, or indirectly connected through intermediate medium, or the communication between two elements or the interaction relationship between two elements, unless otherwise specified. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be indirectly contacted through intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be the first feature directly above or obliquely above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be the first feature directly below or obliquely below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of the utility model, the terms "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0038] Any procedural or methodological descriptions in the flow charts or otherwise described herein can be understood to represent modules, segments or portions of code that include executable instructions for implementing one or more steps of a particular logic function or process, and the scope of the preferred embodiments of the present application includes further implementations in which the functions can be performed in an order other than that shown or discussed, including substantially simultaneously or in reverse order, in accordance with the functions involved, as will be understood by those skilled in the art to which the embodiments of the present application pertain.

[0039] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0040] Although the embodiments of the present application have been shown and described above, it should be understood that the above-described embodiments are exemplary and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. An electric drive assembly, characterized by The utility model relates to an electric drive assembly, comprising: a driving motor (2) having a hollow shaft (1) in the middle part; a reducer (7) arranged on the first end of the hollow shaft (1); an output shaft (5) penetrating through the hollow shaft (1), the input end of the output shaft (5) being connected with the reducer (7), and the output end of the output shaft (5) being located on the same side of the second end of the hollow shaft (1) as the driving motor (2); a housing comprising a first part housing (9) and a second part housing (10) connected together, the first part housing (9) being arranged on the periphery of the driving motor (2), and the second part housing (10) being arranged on the periphery of the reducer (7), the longitudinal section of the housing being a stepped section, and the longitudinal section height of the first part housing (9) being smaller than that of the second part housing (10).

2. The electric drive assembly of claim 1, wherein, The reducer (7) is a two-stage reducer.

3. The electric drive assembly of claim 2, wherein, The reducer (7) comprises first to fourth gears (Z1-Z4), an intermediate shaft (4) and a first shaft (3), the first gear (Z1) being arranged on the hollow shaft (1), the second gear (Z2) and the third gear (Z3) being coaxially arranged on the intermediate shaft (4), the second gear (Z2) being engaged with the first gear (Z1), the fourth gear (Z4) being arranged on the first shaft (3), the fourth gear (Z4) being engaged with the third gear (Z3), and the first shaft (3) being connected with the input end of the output shaft (5).

4. The electric drive assembly of claim 3, wherein, The first shaft (3) and the input end of the output shaft (5) are connected by means of a spline.

5. The electric drive assembly of claim 3, wherein, The first part housing (9) and the second part housing (10) are integrally formed.

6. A new energy vehicle, characterized in that, The utility model relates to an electric drive assembly, comprising: a driving motor (2) having a hollow shaft (1) in the middle part; a reducer (7) arranged on the first end of the hollow shaft (1); an output shaft (5) penetrating through the hollow shaft (1), the input end of the output shaft (5) being connected with the reducer (7), and the output end of the output shaft (5) being located on the same side of the second end of the hollow shaft (1) as the driving motor (2); a housing comprising a first part housing (9) and a second part housing (10) connected together, the first part housing (9) being arranged on the periphery of the driving motor (2), and the second part housing (10) being arranged on the periphery of the reducer (7), the longitudinal section of the housing being a stepped section, and the longitudinal section height of the first part housing (9) being smaller than that of the second part housing (10). The reducer (7) is a two-stage reducer. The reducer (7) comprises first to fourth gears (Z1-Z4), an intermediate shaft (4) and a first shaft (3), the first gear (Z1) being arranged on the hollow shaft (1), the second gear (Z2) and the third gear (Z3) being coaxially arranged on the intermediate shaft (4), the second gear (Z2) being engaged with the first gear (Z1), the fourth gear (Z4) being arranged on the first shaft (3), the fourth gear (Z4) being engaged with the third gear (Z3), and the first shaft (3) being connected with the input end of the output shaft (5). The first shaft (3) and the input end of the output shaft (5) are connected by means of a spline. The first part housing (9) and the second part housing (10) are integrally formed. The utility model relates to an electric drive assembly, comprising: a driving motor (2) having a hollow shaft (1) in the middle part; a reducer (7) arranged on the first end of the hollow shaft (1); an output shaft (5) penetrating through the hollow shaft (1), the input end of the output shaft (5) being connected with the reducer (7), and the output end of the output shaft (5) being located on the same side of the second end of the hollow shaft (1) as the driving motor (2); a housing comprising a first part housing (9) and a second part housing (10) connected together, the first part housing (9) being arranged on the periphery of the driving motor (2), and the second part housing (10) being arranged on the periphery of the reducer (7), the longitudinal section of the housing being a stepped section, and the longitudinal section height of the first part housing (9) being smaller than that of the second part housing (10). The reducer (7) is a two-stage reducer. The reducer (7) comprises first to fourth gears (Z1-Z4), an intermediate shaft (4) and a first shaft (3), the first gear (Z1) being arranged on the hollow shaft (1), the second gear (Z2) and the third gear (Z3) being coaxially arranged on the intermediate shaft (4), the second gear (Z2) being engaged with the first gear (Z1), the fourth gear (Z4) being arranged on the first shaft (3), the fourth gear (Z4) being engaged with the third gear (Z3), and the first shaft (3) being connected with the input end of the output shaft (5). The first shaft (3) and the input end of the output shaft (5) are connected by means of a spline. The first part housing (9) and the second part housing (10) are integrally formed. The utility model relates to an electric drive assembly, comprising:

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