Shaftless Output Motor, New Energy Vehicle

Abstract

The present invention provides a motor without shaft-end output and a new energy vehicle. A motor without shaft-end output includes: a first driving part and a second driving part arranged coaxially, and a transmission chamber communicating with the outside is formed between the first driving part and the second driving part; a rotating shaft connected to the first driving part and the second driving part and rotated under the action of the first driving part and / or the second driving part; a transmission member arranged on the rotating shaft and accommodated in the transmission chamber. In the present invention, the first driving part and the second driving part are arranged on one motor. While ensuring that sufficient driving force can be provided, the transmission member capable of realizing transmission with the outside is clamped at the middle position between the two driving parts. Compared with the traditional motor that needs to install the transmission member on the shaft end extending out of the motor body, the present invention does not need to set an output shaft extending out of the motor, reducing the overall volume of the motor. The reduction of the motor volume can effectively reduce the problem of large space occupied by the vehicle drive system.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly to a motor without shaft-end output and a new energy vehicle. Background Art

[0002] Most electric vehicles are driven in a front-wheel drive or rear-wheel drive manner. Their drive motors are generally installed on the vehicle chassis, and the power output mode of the drive motor mostly adopts the "interleaved drive" mode, such as Figure 1 shown, that is, "motor 1 - output shaft 2 - universal joint 4 - transmission shaft 3 - axle 5". There are many intermediate transmission structures, resulting in low drive efficiency and large space occupation.

[0003] In the prior art, installing the drive motor on the axle can eliminate the need to install universal joint parts. However, since the motor is fixed on the axle, due to the output torque problem, multiple drive motors need to be installed to ensure sufficient output torque, and the problem of large space occupation of the drive system cannot be effectively solved. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the problems of complex structure and large space occupation of the power system of existing electric vehicles caused by the output mode of the drive motor in the prior art, so as to provide a motor without shaft-end output and a new energy vehicle.

[0005] To solve the above problems, the present invention provides a motor without shaft-end output, including: a first drive part and a second drive part arranged coaxially, a transmission chamber communicating with the outside world is formed between the first drive part and the second drive part; a rotating shaft connected to the first drive part and the second drive part, and rotates under the action of the first drive part and / or the second drive part; a transmission member arranged on the rotating shaft and accommodated in the transmission chamber.

[0006] Further, the first drive part and / or the second drive part sequentially include a rotor, a stator, and a housing along the radial direction outward, and the rotating shaft is arranged on the rotor.

[0007] Further, an unclosed annular protrusion is formed on the end face of the housing close to the second drive part, a bearing chamber is formed at the middle position of the annular protrusion, and the unclosed part of the annular protrusion is configured as the transmission chamber.

[0008] Further, the upper end face of the annular protrusion is used as the fitting surface for the first drive part and the second drive part.

[0009] Further, the first drive part and the second drive part are configured as two structural components symmetrically arranged with respect to the fitting surface.

[0010] Further, the rotating shaft includes a first rotating shaft and a second rotating shaft respectively disposed on the rotor.

[0011] Further, the transmission member is a transmission gear, and an installation hole is provided in the middle thereof. The first rotating shaft and the second rotating shaft are docked into one body through the installation hole.

[0012] Further, the first driving part and the second driving part are configured as the same driving motor.

[0013] Further, the first driving part and the second driving part are configured as different driving motors.

[0014] The present invention also provides a new energy vehicle including: the shaftless end output motor described above; and an axle, wherein the shaftless end output motor is disposed in the axle.

[0015] The technical solution of the present invention has the following advantages:

[0016] 1. The shaftless end output motor in the present invention includes: a first driving part and a second driving part arranged coaxially, a transmission chamber communicating with the outside world is formed between the first driving part and the second driving part; a rotating shaft connected to the first driving part and the second driving part and rotating under the action of the first driving part and / or the second driving part; a transmission member disposed on the rotating shaft and accommodated in the transmission chamber.

[0017] In the present invention, a first driving part and a second driving part are provided on one motor. While ensuring sufficient driving force can be provided, the transmission member that can realize transmission with the outside is clamped at the middle position between the two driving parts. Compared with the traditional motor that needs to install the transmission member on the shaft end extending out of the motor body, in the present invention, there is no need to provide an output shaft extending out of the motor, reducing the overall volume of the motor. The reduction of the motor volume can effectively reduce the problem of large space occupied by the vehicle drive system.

[0018] On the other hand, compared with the arrangement method in which the motor shaft and the wheel shaft are arranged in a staggered manner introduced in the background art, the motor in the present invention can realize the side-by-side arrangement with the wheel shaft, reducing the occupation in the length direction of the vehicle body, and can be directly connected to the axle, reducing the intermediate connecting parts and improving the energy transmission efficiency.

[0019] 2. In the shaftless output motor of the present invention, an unclosed annular protrusion is formed on the end face of the outer shell close to the second driving part. A bearing chamber is formed at the middle position of the annular protrusion, and the unclosed part of the annular protrusion is configured as the transmission chamber. In the prior art, the transmission part is generally a transmission gear, made of copper or iron. In order to ensure smooth transmission and reduce transmission resistance, lubricating oil or grease needs to be coated on the transmission part. However, in the prior art, the transmission part is mostly directly exposed and installed on the output shaft end of the motor, and external dust will contaminate the lubricating oil or grease. Therefore, an additional protection structure is required, which makes the motor transmission assembly complex. In the present invention, the motor housing is directly used to form the transmission chamber, and the transmission part is arranged in the transmission chamber, which can effectively protect the transmission part.

[0020] 3. In the shaftless output motor of the present invention, the upper end face of the annular protrusion is used as the joint surface for the first driving part and the second driving part. The way of fitting the first driving part and the second driving part together avoids the problem that the axial length of the motor increases due to the gap between the first driving part and the second driving part.

[0021] 4. In the shaftless output motor of the present invention, the first driving part and the second driving part are configured as two structural components symmetrically arranged with respect to the joint surface. The design of symmetric structural parts can effectively simplify the structure of the motor and also facilitate the processing of parts.

[0022] 5. In the shaftless output motor of the present invention, the rotating shaft includes a first rotating shaft and a second rotating shaft respectively arranged on the rotor. With this design of the two rotating shafts, when one of the first driving part or the second driving part is damaged, due to the design of separating the rotating shafts, they can be directly separated for replacement and maintenance.

[0023] 6. In the shaftless output motor of the present invention, the first driving part and the second driving part are configured as the same driving motor. The principles and structures of the first driving part and the second driving part in the present invention are similar to those of traditional motors. In some embodiments, setting the first driving part and the second driving part as the same type of driving motor can facilitate the control of the motor in the present invention. Moreover, for the two driving parts in the present invention, the working conditions of the driving parts can be selected according to the actual working conditions. For example, when the load is small, only the first driving part or the second driving part can be controlled to work, and when the load is large, the first driving part and the second driving part can be controlled to work simultaneously.

[0024] 7. In the shaftless output motor of the present invention, the first driving part and the second driving part are configured as different driving motors, and different driving motors can drive a wider range of loads. Description of the Drawings

[0025] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 The drawing of the background art provided by the present invention;

[0027] Figure 2 The partial cross-sectional view of the shaftless output motor in Embodiment 1 provided by the present invention;

[0028] Figure 3 The external view of the shaftless output motor in Embodiment 1 provided by the present invention;

[0029] Figure 4 The structural schematic diagram of the housing in Embodiment 1 provided by the present invention;

[0030] Figure 5 The assembly schematic diagram of the rotating shaft and the transmission member in Embodiment 1 provided by the present invention;

[0031] Figure 6 The structural schematic diagram of the rotating shaft in Embodiment 1 provided by the present invention;

[0032] Figure 7 The structural schematic diagram of the transmission member in Embodiment 1 provided by the present invention.

[0033] Explanation of the reference numerals in the background art:

[0034] 1 - Motor;

[0035] 2 - Output shaft;

[0036] 3 - Transmission shaft;

[0037] 4 - Universal joint;

[0038] 5 - Axle;

[0039] 6 - Driving wheel.

[0040] Explanation of the reference numerals in the embodiment:

[0041] 1 - First driving part; 11 - Rotor; 12 - Stator; 13 - Outer shell; 14 - End cover; 131 - Annular protrusion; 1311 - Upper end face;

[0042] 2 - Second driving part;

[0043] 3 - Transmission chamber;

[0044] 4 - Rotating shaft; 41 - First rotating shaft; 42 - Second rotating shaft; 411 - Keyway; 412 - Shoulder; 413 - Rotor mating surface; 414 - Bearing mating surface;

[0045] 5 - Transmission part; 51 - Mounting hole; 52 - Gear keyway; 53 - Tooth part; 54 - Bush

[0046] 6 - Bearing chamber;

[0047] 7 - Flat key;

[0048] 8 - Bearing;

[0049] 9 - Elastic pad. Detailed implementation mode

[0050] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0051] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0052] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0053] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0054] Embodiment 1

[0055] Figures 2 to 7As shown in the figure, a shaftless output motor provided in this embodiment includes a first driving part 1 and a second driving part 2 arranged coaxially. A transmission chamber 3 communicating with the outside is formed between the first driving part 1 and the second driving part 2; a rotating shaft 4 is connected to the first driving part 1 and the second driving part 2 and rotates under the action of the first driving part 1 and / or the second driving part 2; a transmission member 5 is arranged on the rotating shaft 4 and accommodated in the transmission chamber 3.

[0056] It should be noted that the motor in this embodiment is used for new energy vehicles to drive the front wheels or rear wheels of new energy vehicles to rotate.

[0057] Of course, the shaftless output motor in this embodiment can also be applied in other industries, such as mining equipment, etc.

[0058] In this embodiment, the design of setting the first driving part 1 and the second driving part 2 is to ensure that sufficient driving force is provided for new energy vehicles or one of the driving parts is used as a standby motor.

[0059] In this embodiment, the driving principles of the first driving part 1 and the second driving part 2 are the same as those of traditional motors, and the structures are similar. As Figure 2 shown in the figure, it can be approximately regarded as two motors assembled together through improvement in structure. Therefore, the specific structures of the first driving part 1 and the second driving part 2 will not be elaborated in this application.

[0060] In this embodiment, the first driving part 1 and the second driving part 2 are set. While ensuring that sufficient driving force can be provided, the transmission member that can realize transmission with the outside is clamped at the middle position between the two driving parts. Compared with the traditional motor that needs to install the transmission member on the shaft end extending out of the motor body, there is no need to set an output shaft extending out of the motor in this embodiment, reducing the overall volume of the motor. The reduction of the motor volume can effectively reduce the problem of large space occupied by the vehicle drive system.

[0061] On the other hand, compared with the way in which the motor shaft and the wheel shaft are arranged in a staggered manner introduced in the background technology, the motor in this embodiment can realize a side-by-side arrangement with the wheel shaft, reducing the occupation in the length direction of the vehicle body, and can be directly connected to the axle, reducing the intermediate connecting parts and improving the energy transmission efficiency.

[0062] The following specifically elaborates on the motor structure in this embodiment:

[0063] First of all, it should be noted that the first driving part 1 and the second driving part 2 in this embodiment are two identical motor structures. Therefore, in the following introduction, only the first driving part 1 will be used as an example for elaboration.

[0064] It should be elaborated here that the first driving part 1 and the second driving part 2 in this embodiment are symmetrically the same in structure. The design of symmetric structural parts can effectively simplify the structure of the motor and also facilitate the machining of parts.

[0065] It should also be elaborated here that the first driving part 1 and the second driving part 2 in this embodiment are the same in performance parameters. Specifically, they can be regarded as two motors of the same type, and motors of the same type are convenient to control.

[0066] On the other hand, it should be elaborated that when motors of the same type are in use, it is possible to select whether they work simultaneously or only one of them works according to the size of the load.

[0067] Some brief descriptions about the structure of the first driving part 1 are made here for the subsequent description of the structure:

[0068] The first driving part 1 is cylindrical and sequentially includes a rotor 11, a stator 12, and a housing 13 from the inside to the outside along the radial direction. The rotating shaft 4 is fixed on the rotor 11 by an interference fit.

[0069] The first driving part 1 further includes an end cover 14 screwed to the rear end of the housing 13. A groove is machined at a position corresponding to the shaft end of the rotating shaft 4 on the middle part of the inner side surface of the end cover 14. The bearing 8 is installed in the groove by an interference fit, and one end of the rotating shaft 4 is supported by the bearing 8 here.

[0070] As Figure 4 shown, an unclosed annular protrusion 131 is formed on the end face of the housing 13 close to the second driving part 2. A bearing chamber 6 is formed at the middle position of the annular protrusion 131. As Figure 2 shown in the figure, the bearing 8 is embedded in the bearing chamber 6, and together with the bearing 8 in the above groove, it realizes the support of the rotating shaft 4.

[0071] As Figure 4 shown, the unclosed part of the annular protrusion 131 in this embodiment is constructed as a part of the transmission chamber 3. Combining Figure 3 it can be seen that the two housings 13 are docked axially, the upper end faces 1311 of the two annular protrusions 131 are fitted, and the two notch parts are docked to form the transmission chamber 3, which is connected to the outside.

[0072] As Figure 3As shown, the transmission part 5 in this embodiment is a gear. Generally, the transmission parts in the prior art are also transmission gears, which are made of copper or iron. In order to ensure smooth transmission and reduce transmission resistance, lubricating oil or grease needs to be applied to the transmission part. However, in the prior art, the transmission parts are mostly directly and externally installed at the output shaft end of the motor, and the lubricating oil or grease will be contaminated by external dust. Therefore, an additional protective structure is required, which makes the motor transmission assembly complex. In this embodiment, the motor housing 13 is directly used to form a transmission chamber 3, and the transmission part 5 is arranged in the transmission chamber, which can effectively protect the transmission part 5.

[0073] Further, the first driving part 1 and the second driving part 2 take the upper end surface 1311 of the annular protrusion 131 as the joint surface, avoiding the problem that the axial length of the motor increases due to the gap between the first driving part 1 and the second driving part 2.

[0074] Further, an annular elastic pad 9 is installed at the bottom of the groove of the bearing chamber 6 to avoid the end face wear of the bearing 8.

[0075] Figure 5 and Figure 6 As shown, the rotating shaft 4 includes a first rotating shaft 41 and a second rotating shaft 42 respectively installed on the rotor 11. With this design of the two rotating shafts 4, when one of the first driving part 1 or the second driving part 2 is damaged, due to the designed separation of the rotating shafts 4, the two can be directly separated for replacement and maintenance.

[0076] As Figure 5 shown and Figure 7 shown, an installation hole 51 is provided in the middle of the transmission part 5, and the first rotating shaft 41 and the second rotating shaft 42 are butted together through the installation hole 51. Taking the first rotating shaft 41 as an example, since the second rotating shaft 42 has a mirror structure with the first rotating shaft 41, specifically, a keyway 411 is provided on one shaft end of the first rotating shaft 41 close to the transmission part 5. The transmission part 5 is a gear, and a shaft sleeve 54 is formed outward along the edge of the installation hole 51 at the central part thereof. A gear keyway 52 corresponding to the keyway 411 is formed on the inner side surface of the shaft sleeve 54. A flat key 7 is installed in the above keyway 411 and gear keyway 52 by interference fit to fix the rotating shaft 41 and the transmission part 5 together. The installation and fixation of the second rotating shaft 42 are the same as those of the first rotating shaft 41, and the opposite surfaces of the transmission part 5 have the same structural features. Driven by the rotating shaft 4, the tooth part 53 of the transmission part 5 meshes with an external device for driving.

[0077] In order to prevent the axial movement of the above-mentioned transmission part 5 and the rotor 11, a shoulder 412 is also formed on the first rotating shaft 41.

[0078] The inner side surface of the rotor 11 is fitted and installed on the rotor mating surface 413 of the first rotating shaft 41, and the bearing 8 in the bearing chamber 6 is fitted and installed on the bearing mating surface 414 of the first rotating shaft 41.

[0079] In some other embodiments, the first driving part 1 and the second driving part 2 are configured as different driving motors, and the range of loads that different driving motors can drive is larger.

[0080] Embodiment 2

[0081] This embodiment provides a new energy vehicle, which has the shaftless output motor in the above-mentioned Embodiment 1; and an axle, the shaftless output motor is installed in the axle, and there is a gearbox on the axle, and the above-mentioned tooth part 53 is connected to the power input end of the gearbox.

[0082] Obviously, the above embodiments are only examples for clear illustration and are not limitations on the embodiments. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the embodiments here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A shaftless output motor, characterized in that, Comprising: A first driving part (1) and a second driving part (2) which are coaxially arranged, and a transmission chamber (3) communicating with the outside world is formed between the first driving part (1) and the second driving part (2); A rotating shaft (4) is connected to the first driving part (1) and the second driving part (2), and is rotated under the action of the first driving part (1) and / or the second driving part (2); A transmission member (5) is arranged on the rotating shaft (4) and is accommodated in the transmission chamber (3). The first driving part (1) and / or the second driving part sequentially includes a rotor (11), a stator (12), and a housing (13) from radially outward. The rotating shaft (4) is arranged on the rotor (11). An unclosed annular protrusion (131) is formed on the end face of the housing (13) close to the second driving part (2). A bearing chamber (6) is formed at the middle position of the annular protrusion (131). The unclosed part of the annular protrusion (131) is configured as the transmission chamber (3), The annular protrusion (131) is formed at the end of the housing (13), and the inner and outer walls of the annular protrusion (131) are flush with the inner and outer walls of the housing (13). The first driving part (1) and the second driving part (2) take the upper end face (1311) of the annular protrusion (131) as the joint surface.

2. The shaftless end output motor according to claim 1, wherein, The first driving part (1) and the second driving part (2) are configured as two structural components symmetrically arranged with respect to the joint surface.

3. The shaftless end output motor according to claim 2, wherein, The rotating shaft (4) includes a first rotating shaft (41) and a second rotating shaft (42) respectively arranged on the rotor (11).

4. The shaftless end output motor according to claim 3, wherein The transmission member (5) is a transmission gear, and an installation hole (51) is arranged in the middle thereof. The first rotating shaft (41) and the second rotating shaft (42) are butted together through the installation hole (51).

5. The shaftless output motor according to any one of claims 1-4, characterized in that, The first driving part (1) and the second driving part (2) are configured as the same driving motor.

6. The shaftless end output motor according to any one of claims 1 to 4, characterized in that, The first driving part (1) and the second driving part (2) are configured as different driving motors.

7. A new energy vehicle, characterized in that, Comprising: The shaftless end output motor according to any one of claims 1-6; And an axle, and the shaftless end output motor is arranged in the axle.

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