Gearbox and electric drive vehicle

Abstract

The application discloses a gearbox and an electric drive vehicle. The gearbox comprises a first housing, a second housing connected to one side of the first housing, an intermediate plate arranged between the first housing and the second housing, and forming a first containing part with the first housing and a second containing part with the second housing, wherein the intermediate plate can be used for fixing bearings of a gear set, a motor arranged in the first containing part, a motor rotating shaft, one end of the motor rotating shaft being fixed to the first housing and the other end extending to the second housing and being fixed to the second housing, and a gear set arranged in the second containing part.

Description

Technical Field

[0001] This invention relates to the field of electric motor technology, and more particularly to a gearbox and an electric vehicle. Background Technology

[0002] With social development, the new energy vehicle industry has experienced rapid growth. As a key component of new energy vehicles, the transmission has undergone significant changes compared to traditional car transmissions in electric vehicles. Existing transmissions often consist of multiple housings combined to form the internal space for the motor and gears, leading to increased manufacturing costs, assembly difficulties, and low assembly precision. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a gearbox and an electric drive vehicle, the structure of which can effectively reduce manufacturing costs.

[0004] According to one aspect of the present invention, a gearbox is provided, the gearbox comprising: a first housing; a second housing connected to one side of the first housing and connected to the first housing; an intermediate plate disposed between the first housing and the second housing, forming a first receiving portion with the first housing and a second receiving portion with the second housing, wherein the intermediate plate can be used to fix a bearing of a transmission gear set; a motor disposed in the first receiving portion; a motor shaft, one end of which is fixed to the first housing and the other end of which extends toward and is fixed to the second housing; and a transmission gear set disposed in the second receiving portion.

[0005] Optionally, the first housing further includes an oil storage cavity, which is formed by combining the side wall of the first housing and the intermediate plate.

[0006] Optionally, the gearbox includes a first bearing and a second bearing, the first bearing being disposed at one end of the motor shaft and fixed to the first housing, and the second bearing being disposed at the other end of the motor shaft and fixed to the second housing.

[0007] Optionally, the transmission gear set includes a drive gear, which is mounted on the motor shaft and rotates synchronously with the motor shaft.

[0008] Optionally, the gear set further includes a first driven gear and a second driven gear with a different outer diameter than the first driven gear. The first driven gear and the second driven gear rotate coaxially through a driven shaft, and the first driven gear meshes with the driving gear. One end of the driven shaft is fixed to the intermediate plate, and the other end is fixed to the second housing.

[0009] Optionally, the gear set further includes an output gear that meshes with the second driven gear and is fixed to an output shaft, wherein one end of the output shaft is fixed to the first housing and the other end is fixed to the second housing.

[0010] Optionally, the intermediate plate is fixed to the first housing by bolts.

[0011] Optionally, the first housing and the second housing are fixedly connected by bolts.

[0012] According to another aspect of the invention, an electric vehicle is also provided, the electric vehicle including the gearbox described above.

[0013] By adopting the above technical solution, compared with the prior art, the gearbox and electric drive vehicle provided by the present invention, because the gearbox is composed of two housings, a first housing and a second housing, and the motor is positioned by a single motor shaft, the motor shaft, being an integral shaft, allows for better positioning and connection accuracy, and can be fixed by only two bearings, the first bearing and the second bearing, thereby reducing the overall manufacturing cost of the gearbox. Furthermore, the oil reservoir is located in the first housing portion that houses the motor, allowing some oil to be stored there, thereby reducing the oil level in the second housing portion and minimizing oil churning losses in the transmission system. Attached Figure Description

[0014] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of a gearbox according to an embodiment of the present invention. Detailed Implementation

[0016] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore repeated descriptions of them will be omitted.

[0017] The described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the invention. However, those skilled in the art will recognize that the technical solutions of the invention can be practiced without one or more of the specific details, or by employing other methods, components, materials, etc. In some cases, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the invention.

[0018] According to the inventive concept of the present invention, the gearbox of the present invention includes: a first housing; a second housing connected to one side of the first housing and connected to the first housing; an intermediate plate disposed between the first housing and the second housing, forming a first receiving portion with the first housing and a second receiving portion with the second housing, wherein the intermediate plate can be used to fix the bearing of the gear set; a motor disposed in the first receiving portion; a motor shaft, one end of which is fixed to the first housing and the other end of which extends toward the second housing and is fixed to the second housing; and a gear set disposed in the second receiving portion.

[0019] The technical content of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Please see Figure 1 This illustrates a schematic diagram of a gearbox according to an embodiment of the present invention. Figure 1 As shown, the gearbox of the present invention includes a first housing 1, a second housing 2, an intermediate plate 11, a motor 3, a motor shaft 4, and a gear set.

[0021] Specifically, for example... Figure 1 As shown, the second housing 2 is connected to one side of the first housing 1. Figure 1 The second housing 2 is located to the right of the first housing 1. Figure 1 In the embodiment shown, the first housing 1 and the second housing 2 are fixedly connected by bolts 63 and 64.

[0022] An intermediate plate 11 is disposed between the first housing 1 and the second housing 2, forming a first receiving portion 12 with the first housing 1 and a second receiving portion 21 with the second housing 2. The intermediate plate 11 can be used to fix the bearings of the gear set.

[0023] Motor 3 is housed in the first receiving portion 12. Motor shaft 4 is connected to motor 3. Figure 1 In the illustrated embodiment, one end of the motor shaft 4 is fixed to the first housing 1, and the other end extends into the second housing 2, passes through the intermediate plate 11, and is then fixed to the second housing 2. More specifically... Figure 1In the illustrated embodiment, the gearbox includes a first bearing 41 and a second bearing 42. The first bearing 41 is disposed at one end of the motor shaft 4 and fixed to the first housing 1. The second bearing 42 is disposed at the other end of the motor shaft 4 and fixed to the second housing 2.

[0024] The speed-changing gear set is disposed in the second receiving part 21. Figure 1 In the illustrated embodiment, the gear set includes a driving gear 51. The driving gear 51 is mounted on the motor shaft 4 and rotates synchronously with the motor shaft 4. The gear set also includes a first driven gear 52 and a second driven gear 53 with a different outer diameter than the first driven gear 52. Figure 1 As shown, the outer diameter of the second driven gear 53 is smaller than that of the first driven gear 52, thus having a different linear velocity than the first driven gear 52. More specifically, the first driven gear 52 and the second driven gear 53 rotate coaxially via a driven shaft 54. The first driven gear 52 meshes with the driving gear 51. One end of the driven shaft 54 ​​is fixed to the intermediate plate 11, and the other end is fixed to the second housing 2. Furthermore, the gear set also includes an output gear 55. Figure 1 As shown, the output gear 55 meshes with the second driven gear 53. The output gear 55 is fixed to an output shaft 56. One end of the output shaft 56 is fixed to the first housing 1, and the other end is fixed to the second housing 2.

[0025] The gearbox of the present invention is composed of two housings, a first housing 1 and a second housing 2. The motor 3 is positioned by a motor shaft 4. The motor shaft 4 is an integral shaft, which can improve the positioning and connection accuracy. It can be fixed by only two bearings, a first bearing 41 and a second bearing 42, thereby reducing the overall manufacturing cost of the gearbox.

[0026] Furthermore, in an embodiment of the present invention, the first housing 1 further includes an oil storage cavity 13. For example... Figure 1 As shown, the oil storage cavity 13 is composed of the side wall of the first housing 1 and the intermediate plate 11. One side wall of the first housing 1 faces outwards (…). Figure 1 The lower side wall (with the middle section facing downward) is inclined at an angle, thereby forming the oil storage cavity 13 with the middle plate 11 at the lower part of the first receiving part 12.

[0027] The oil storage chamber 13 allows some oil to be stored there, thereby reducing the oil level in the second container and reducing the oil churning loss in the transmission system.

[0028] Furthermore, the present invention also provides an electric vehicle. This electric vehicle includes the above-described components. Figure 1 The gearbox shown.

[0029] In summary, in the gearbox and electric drive vehicle provided by the embodiments of the present invention, since the gearbox is composed of two housings, a first housing and a second housing, and the motor is positioned by a single motor shaft, the motor shaft, being an integral shaft, allows for better positioning and connection accuracy. Furthermore, it can be fixed using only two bearings, the first bearing and the second bearing, thereby reducing the overall manufacturing cost of the gearbox. In addition, the oil reservoir is located within the first housing portion that houses the motor, allowing some oil to be stored there, thus lowering the oil level in the second housing portion and reducing oil churning losses in the transmission system.

[0030] While the present invention has been disclosed above with reference to optional embodiments, it is not intended to limit the invention. Those skilled in the art to which this invention pertains can make various modifications and alterations without departing from the spirit and scope of the invention. Therefore, the scope of protection of this invention shall be determined by the scope defined in the claims.

Claims

1. A gearbox, characterized in that, The gearbox includes: First shell; The second housing is connected to one side of the first housing and is connected to the first housing; An intermediate plate is disposed between the first housing and the second housing, forming a first receiving portion with the first housing and a second receiving portion with the second housing, wherein the intermediate plate can be used to fix the bearing of the gear set; The motor is disposed in the first receiving portion; A motor shaft, one end of which is fixed to the first housing, and the other end extends into the second housing and is fixed to the second housing; A speed-changing gear set is disposed in the second receiving portion; The first housing further includes an oil storage cavity, which is formed by combining the side wall of the first housing and the intermediate plate; The gearbox includes a first bearing and a second bearing. The first bearing is disposed at one end of the motor shaft and fixed to the first housing, and the second bearing is disposed at the other end of the motor shaft and fixed to the second housing. The gear set includes a drive gear, which is mounted on the motor shaft and rotates synchronously with the motor shaft. The gear set further includes a first driven gear and a second driven gear with a different outer diameter than the first driven gear. The first driven gear and the second driven gear rotate coaxially through a driven shaft, and the first driven gear meshes with the driving gear. One end of the driven shaft is fixed to the intermediate plate, and the other end is fixed to the second housing. The gear set further includes an output gear, which meshes with the second driven gear and is fixed on an output shaft, wherein one end of the output shaft is fixed to the first housing and the other end is fixed to the second housing.

2. The gearbox according to claim 1, characterized in that, The intermediate plate is fixed to the first housing by bolts.

3. The gearbox according to claim 1, characterized in that, The first housing and the second housing are fixedly connected by bolts.

4. An electric vehicle, characterized in that, The electric vehicle includes a gearbox as described in any one of claims 1 to 3.

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