New energy differential motor and new energy electric vehicle

Abstract

The invention discloses a new energy differential motor and a new energy electric vehicle. The new energy differential motor comprises a shell; the left half shaft is connected to the left side of the shell, and one end of the left half shaft is connected with a vehicle left half shaft; and the right half shaft is connected to the right side of the shell, and one end of the right half shaft is connected with a right half shaft of a vehicle. The rotor rotates through the rotating magnetic field, so that the left half shaft and the right half shaft are driven to rotate, the left half shaft and the right half shaft transmit rotating force to the left side and the right side of a vehicle, the left half shaft and the right half shaft are connected through the first bearing and the second bearing, and it is ensured that the left half shaft and the right half shaft can rotate synchronously or asynchronously; the stability of the left half shaft and the right half shaft is ensured, meanwhile, the low-speed alternating-current variable-frequency motor can work at different rotating speeds, and the low-speed alternating-current variable-frequency motor has the advantages that the low-speed alternating-current variable-frequency motor can adapt to different speed requirements without a traditional gearbox, so that the overall efficiency and the energy-saving effect are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a new energy differential motor and a new energy electric vehicle. Background Art

[0002] We have entered the new energy era, and new energy vehicles are mainly driven by electricity. In order to maximize the advantages of electricity, we need to consider abandoning some components of fuel vehicles, such as gearboxes and differentials, which are important running parts of fuel vehicles and also a large energy consumer. Therefore, differential motors can be used to replace traditional gearboxes and differentials.

[0003] A brushless motor differential assembly for an electric vehicle with publication number CN201490832U comprises a motor housing, a left end cover and a right end cover are respectively installed at both ends of the motor housing, a rotor core wrapped with a rotor winding is arranged in the motor housing, a transmission hub is fixedly installed on the inner side of the rotor core, a differential is arranged in the transmission hub, the differential comprises a main differential hub and a secondary differential hub fixedly installed on the transmission hub, a planetary bevel gear is rotatably installed in the main differential hub, a right half shaft is slidably fitted in the main differential hub, and a right bevel gear located in the main differential hub is fixedly installed at one end of the right half shaft. By adopting an integrated motor differential structure, the differential is arranged in the motor rotor, energy loss in transmission is avoided, and mechanical transmission efficiency is improved, but this differential motor has a complex structure, more extra work, low power utilization, and high manufacturing cost when mass-produced. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings existing in the prior art, and the proposed new energy differential motor includes: a housing; a left half-shaft, the left half-shaft is connected to the left side of the housing, and one end of the left half-shaft is connected to the left half-shaft of the vehicle; a right half-shaft, the right half-shaft is connected to the right side of the housing, and one end of the right half-shaft is connected to the right half-shaft of the vehicle; a rotating magnetic field, the rotating magnetic field is connected to the inside of the housing, and a first rotor and a second rotor are arranged inside the rotating magnetic field.

[0005] As a further description of the above technical solution: a first bearing and a second bearing are connected between the right half shaft and the left half shaft.

[0006] As a further description of the above technical solution: the left half shaft is connected to the housing through a third bearing, and the right half shaft is connected to the housing through a fourth bearing.

[0007] As a further description of the above technical solution: the right half-axis and the left half-axis are concentric axes.

[0008] As a further description of the above technical solution: the first bearing and the third bearing are on the same vertical line.

[0009] As a further description of the above technical solution: the left half shaft and the right half shaft are both connected to the left and right half shafts of the vehicle through a "cross" shaft or a mechanical spline.

[0010] As a further description of the above technical solution: oil seals are arranged outside the first bearing, the second bearing, the third bearing and the fourth bearing.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] 1. The present invention generates different speeds in response to the alternating current supplied by the frequency converter, which basically meets all speed requirements of the vehicle during driving. The power output of the differential motor no longer relies on the output of the gearbox and the differential, but is directly driven by changing the speed of the variable frequency motor through the re-arrangement of the coil windings and the alternating current frequency, which has obvious advantages in terms of energy saving and cost.

[0013] 2. The design of omitting brushes and collector rings in the present invention also reduces maintenance requirements, is suitable for high-power applications, has a simple and durable structure, a simple differential motor structure, is easy to process, is economical and durable, and is convenient for large-scale production. It can be widely used in new energy electric vehicles and small battery three- and four-wheel battery vehicles, and is very widely used.

[0014] 3. In the present invention, the left and right half shafts are connected by the first and second bearings to form concentric shafts, and under the support of the third and fourth bearings, the two half shafts can operate synchronously, asynchronously, or in reverse. This mechanical bearing connection method can completely passively accept the formation of differential rotation of the left and right half shafts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a new energy differential motor in an embodiment of the present invention.

[0016] Legend:

[0017] 1. Left half shaft; 2. Third bearing; 3. Second bearing; 4. First bearing; 5. Housing; 6. Fourth bearing; 7. Right half shaft; 8. First rotor; 9. Rotating magnetic field; 10. Second rotor. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. 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, 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 cannot be understood as a limitation on the present invention.

[0020] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed", "connected", and "connected" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] See also Figure 1 The present invention provides a technical solution: the new energy differential motor of the present invention comprises: a housing 5; a left half shaft 1, the left half shaft 1 is connected to the left side of the housing 5, and one end of the left half shaft 1 is connected to the left half shaft of the vehicle; a right half shaft 7, the right half shaft 7 is connected to the right side of the housing 5, and one end of the right half shaft 7 is connected to the right half shaft of the vehicle; a rotating magnetic field 9, the rotating magnetic field 9 is connected to the inside of the housing 5, and a first rotor 8 and a second rotor 10 are arranged inside the rotating magnetic field 9. The left half shaft 1 and the right half shaft 7 are connected as a whole through a first bearing 4 and a second bearing 3, but can rotate synchronously or asynchronously, and the left half shaft 1 and the right half shaft 7 are tightly fixed to the differential motor housing 5 by a third bearing 2 and a fourth bearing 6.

[0022] In this embodiment, different speeds are generated in response to the alternating current supplied from the frequency converter, thereby basically meeting all speed requirements during vehicle driving. The power output of the differential motor no longer relies on the gearbox and differential output, but is directly driven by changing the speed of the variable frequency motor through the recombination and arrangement of the coil windings and the alternating current frequency, which has obvious advantages in terms of energy saving and cost.

[0023] Specifically, we will use a low-speed AC variable frequency motor to illustrate. This motor is an AC variable frequency motor that can respond to the 0-400Hz AC power supplied by the inverter to generate different speeds, basically meeting all speed requirements during vehicle driving (discarding the large energy consumption unit - the gearbox). If the torque is insufficient at startup, you can consider setting two speed gears for the variable frequency motor (using different arrangements and combinations of AC motor coil windings, it can be set to about 30 rpm and 1200 rpm, which can meet the speed requirements of starting, medium speed and high speed driving of the vehicle) to give full play to the advantages of high efficiency and high torque of the low-speed motor.

[0024] Among them, the first bearing 4 and the second bearing 3 are small bearings, and the third bearing 2 and the fourth bearing 6 are large bearings. The combination of small bearings and large bearings ensures the stability of the left and right half shafts, and can work at different speeds. The advantage of using a low-speed AC variable frequency motor is that it can adapt to different speed requirements without the need for a traditional gearbox, thereby improving overall efficiency and energy saving. In addition, the design of omitting brushes and collector rings also reduces maintenance requirements and is suitable for high-power applications. This structure is simple and durable, and is indeed an ideal choice for new energy electric vehicles and small battery vehicles.

[0025] Specifically, the differential motor is not provided with brushes and collector rings, and is more suitable for high-power motors to meet vehicle needs. At the same time, the differential motor has a simple structure, is easy to process, is economical and durable, and is convenient for large-scale production. It can be widely used in new energy electric vehicles and small battery three- and four-wheel battery vehicles, and is widely used.

[0026] like Figure 1 As shown, the first bearing 4 and the second bearing 3 are connected between the right half shaft 7 and the left half shaft 1, the left half shaft 1 is connected to the housing 5 through the third bearing 2, and the right half shaft 7 is connected to the housing 5 through the fourth bearing 6, and the right half shaft 7 and the left half shaft 1 are concentric shafts; the first bearing 4, the second bearing 3, the third bearing 2 and the fourth bearing 6 provide support and stability to ensure the precise positioning and effective operation of the half shafts inside the motor, which can effectively manage the power transmission of the motor and ensure its stable performance under different operating conditions.

[0027] like Figure 1 As shown, the first bearing 4 and the third bearing 2 are on the same vertical line; by having the first bearing 4 and the third bearing 2 on the same vertical line, the fulcrum of the right half shaft 7 is ensured to be stable and reliable, and the stability and reliability of the left half shaft 1 is also guaranteed at the same time. The two half shafts can move axially with a small gap to ensure freedom of rotation, but cannot move radially.

[0028] like Figure 1 As shown, the left half shaft 1 and the right half shaft 7 are connected to the left and right half shafts of the vehicle through a "cross" shaft or a mechanical spline, and the first bearing 4, the second bearing 3, the third bearing 2 and the fourth bearing 6 are all provided with oil seals to ensure the sealing effect of the bearings under different environmental conditions, so as to improve durability and reduce maintenance requirements. The number of oil seals for each bearing can be adjusted according to its working environment and load requirements.

[0029] Among them, the first rotor 8 and the second rotor 10 rotate in the rotating magnetic field 9, and the four bearings, namely the first bearing 4, the second bearing 3, the third bearing 2 and the fourth bearing 6, serve as fulcrums for each other, which are stable and reliable. The first rotor 8 and the second rotor 10 are two rotors with the same geometric dimensions, and rotate in the same rotating magnetic field 9.

[0030] Specifically, when the differential motor rotates normally, the first rotor 8 and the second rotor 10 can rotate normally while tracking the magnetic field within the magnetic field of the rotating magnetic field 9 .

[0031] The first rotor 8 and the second rotor 10 track the magnetic field rotation in the magnetic field of the rotating magnetic field 9. Compared with rigid connection methods such as connecting rod connection, gear connection, chain connection and shaft connection, this electromagnetic connection method adopted in this scheme can passively accept the formation of differential rotation of the left and right half-shafts.

[0032] The left half shaft 1 and the right half shaft 7 are connected by the first bearing 4 and the second bearing 3 to form a concentric shaft, and with the support of the third bearing 2 and the fourth bearing 6, the two half shafts can operate synchronously, asynchronously, or in reverse. This mechanical bearing connection method can completely passively accept the formation of differential rotation of the left and right half shafts.

[0033] Without considering other factors, when the vehicle is driving normally forward, the first rotor 8 and the second rotor 10 can rotate synchronously and drive the wheels normally in the rotating magnetic field. When the vehicle needs to turn left, according to the left turning radius, the speed of the left half shaft decreases moderately, and the speed of the right half shaft increases moderately (the differential speed is related to the turning radius and the tire radius). The principle of right turning is the same. Whether the vehicle turns left or right, it will force the left tire and the right tire to form a differential. This differential electromagnetic connection method and mechanical bearing connection method specially set in this patent allow or can passively accept the formation of differential without affecting the driving force.

[0034] New energy differential motors are used in new energy electric vehicles.

[0035] Working principle: By responding to the AC power supplied by the inverter to generate different speeds, basically meeting all speed requirements during vehicle driving, the power output of the differential motor no longer relies on the gearbox and differential output, but is directly driven by changing the speed of the variable frequency motor through the recombination and arrangement of the coil windings and the AC frequency. It has obvious advantages in terms of energy saving and cost. The design of omitting brushes and collector rings also reduces maintenance requirements and is suitable for high-power applications. This structure is simple and durable, and is indeed an ideal choice for new energy electric vehicles and small battery vehicles.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. New energy differential motor, It is characterized in that include: Housing (5); A left half shaft (1), the left half shaft (1) being connected to the left side of the housing (5), and one end of the left half shaft (1) being connected to the left half shaft of the vehicle; A right half shaft (7), the right half shaft (7) being connected to the right side of the housing (5), and one end of the right half shaft (7) being connected to the right half shaft of the vehicle; A rotating magnetic field (9), the rotating magnetic field (9) is connected to the inside of the housing (5), and a first rotor (8) and a second rotor (10) are arranged inside the rotating magnetic field (9).

2. The new energy differential motor according to claim 1, Features: A first bearing (4) and a second bearing (3) are connected between the right half shaft (7) and the left half shaft (1).

3. The new energy differential motor according to claim 1, Features: The left half shaft (1) is connected to the housing (5) via a third bearing (2), and the right half shaft (7) is connected to the housing (5) via a fourth bearing (6).

4. The new energy differential motor according to claim 1, Features: The right half shaft (7) and the left half shaft (1) are coaxial shafts.

5. The new energy differential motor according to claim 2, Features: The first bearing (4) and the third bearing (2) are on the same vertical line.

6. The new energy differential motor according to claim 1, Features: The left half shaft (1) and the right half shaft (7) are both connected to the left and right half shafts of the vehicle via a "cross" shaft or a mechanical spline.

7. The new energy differential motor according to claim 2, Features: The first bearing (4), the second bearing (3), the third bearing (2) and the fourth bearing (6) are all provided with oil seals on the outside.

8. A new energy electric vehicle comprising the new energy differential motor as described in any one of claims 1 to 7.

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