CN220016028U - Power assembly and vehicle - Google Patents

Abstract

The utility model provides a power assembly and a vehicle, wherein the power assembly comprises a shell which is enclosed into a power cavity; the baffle plate is connected with the shell and divides the power cavity into a motor cavity and a speed reduction cavity; and the oil return structure comprises an oil return channel, the oil return channel is arranged in the shell and is communicated with the motor cavity and the speed reduction cavity, and the bottom surface of the oil return channel in the radial direction is obliquely arranged downwards from the motor cavity towards the speed reduction cavity. According to the utility model, the oil return structure is provided, so that lubricating oil in the motor cavity can flow back into the speed reducing cavity, and the bottom surface of the oil return channel in the radial direction is arranged obliquely downwards from the motor cavity towards the speed reducing cavity, so that a liquid level difference exists between an oil inlet in the motor cavity of the oil return channel and an oil outlet in the speed reducing cavity, thereby being beneficial to the smooth flow of the oil from the motor cavity to the speed reducing cavity, reducing hydraulic resistance and lubrication friction and improving the backflow efficiency of the lubricating oil.

Description

Power assembly and vehicle

Technical Field

The utility model relates to the technical field of vehicle manufacturing, in particular to a power assembly and a vehicle.

Background

The electric drive system is a system which uses a motor as a power source and converts direct current into alternating current through a frequency converter so as to control the motor to operate. It has found wide application in various industries and fields, such as industrial production, machining, aerospace, military, etc. Because of the characteristics of high speed, high power and high voltage, a large amount of lubricating oil is needed to reduce abrasion and friction when the motor runs, and the stable running of equipment is ensured.

The current motor oil return scheme is shown in fig. 1, wherein two sides of a motor cavity are respectively provided with an oil return port, after the oil return ports collect lubricating oil in the motor cavity, the lubricating oil is led into a speed reduction cavity from the motor cavity through an external oil return device, and the scheme needs to be provided with an additional oil return device on one hand, so that the overall cost of the motor is increased; on the other hand, the lubricating oil can be blocked in the two oil return ports, so that the reflux efficiency of the lubricating oil is affected.

Disclosure of Invention

The utility model provides a power assembly and a vehicle, which are used for solving the technical problems that the existing power assembly is unsmooth in oil return and an oil return device is required to be additionally installed.

The first aspect of the utility model provides a power assembly comprising a housing enclosing a power cavity; the baffle plate is connected with the shell and divides the power cavity into a motor cavity and a speed reduction cavity; and the oil return structure comprises an oil return channel, the oil return channel is arranged in the shell and is communicated with the motor cavity and the speed reduction cavity, and the bottom surface of the oil return channel in the radial direction is obliquely arranged downwards from the motor cavity towards the speed reduction cavity.

In this scheme, through providing oil return structure and making the lubricating oil in the motor chamber can flow back to the speed reduction intracavity, through the radial bottom surface with oil return channel from the motor chamber to the direction downward sloping setting in speed reduction chamber for there is a liquid level difference in oil inlet in the motor chamber of oil return channel and the oil-out in the speed reduction chamber, thereby helps fluid smoothly to follow the motor chamber and flows to the speed reduction chamber, reduces hydraulic resistance and lubrication friction, has improved the backward flow efficiency of lubricating oil.

In a further aspect of the present utility model, the oil return structure further includes: the first oil return hole is arranged on the partition plate and is communicated with the motor cavity and the speed reduction cavity; and the second oil return hole is arranged on the partition plate and is communicated with the oil return channel and the speed reduction cavity, and the oil inlet end of the oil return channel is arranged on one side, far away from the speed reduction cavity, of the motor cavity.

In this scheme, because the bottom in motor chamber is separated into two oil collecting ports by the stator of motor in essence, consequently through setting up first oil gallery so that the lubricating oil of one side that the motor chamber is close to the speed reduction chamber can smoothly flow back to the speed reduction chamber, can lead into the speed reduction chamber with the lubricating oil in the oil return passageway through setting up the second oil gallery, because the oil feed end of oil return passageway sets up in the motor intracavity one side of keeping away from the speed reduction chamber, consequently can make the motor chamber one side lubricating oil of keeping away from the speed reduction chamber can smoothly flow back to the speed reduction chamber.

In a further aspect of the utility model, the housing further comprises: a housing; the front end cover is connected to the front end of the shell; the rear end cover is connected to the rear end of the shell; the baffle, the shell and the front end cover enclose a motor cavity, and the baffle, the shell and the rear end cover enclose a speed reducing cavity.

In this scheme, through set up front end housing and rear end cap at the front and back both ends of shell in order to seal the cavity that wholly comprises the shell to enclose to establish into whole power chamber.

In a further scheme of the utility model, a first bearing is arranged on the partition plate, a second bearing is arranged on the rear end cover, the first bearing and the second bearing are fixed with a reducer main shaft, and the reducer main shaft passes through the partition plate through the first bearing.

In the scheme, a first bearing and a second bearing are respectively arranged on the partition plate and the rear end cover to install a reducer main shaft, the reducer main shaft penetrates through the partition plate and is coaxially connected with a motor rotor shaft in the motor cavity in a transmission mode, and a transmission structure is arranged on the reducer main shaft and is in transmission connection with a reducer in the reduction cavity.

In a further scheme of the utility model, the air-permeable valve further comprises an air vent plug, wherein the air vent plug is arranged on the shell and communicated with the power cavity, and the air vent plug is used for balancing air pressure in the power cavity.

In this scheme, since the motor generates heat when it is operated, the heat causes the gas inside the motor to expand while sucking the outside air. A vent plug is thus provided on the motor housing to equalize the air pressure inside the motor.

In a further scheme of the utility model, the partition plate is also provided with a vent hole in a penetrating way, and the vent hole is communicated with the speed reducing cavity and the motor cavity and used for balancing the air pressure in the motor cavity and the speed reducing cavity.

In this solution, the air pressure between the speed reducing chamber and the motor chamber can be balanced by providing an air vent on the partition, and the shaft can be a hollow shaft to form the air vent, since the air vent channel is provided in the shaft to further maintain the pressure balance between the motor chamber and the speed reducing chamber.

In a further aspect of the utility model, the inner diameter of the oil return passage is gradually enlarged from the motor chamber toward the speed reduction chamber.

A second aspect of the utility model provides a vehicle comprising a powertrain as provided in the first aspect of the utility model.

Specifically, the powertrain transmits power to the wheels through a propeller shaft, a universal joint, or the like. Thus, the vehicle can be ensured to have stronger driving force and smoother and comfortable driving feeling. In the aspect of the control system, the control system receives and processes data through devices such as sensors, actuators and the like and sends instructions to the powertrain, so that various performances of the vehicle are optimized and coordinated.

In summary, the water drain valve and the vehicle provided by the utility model have at least the following beneficial effects:

according to the utility model, the oil return structure is provided, so that lubricating oil in the motor cavity can flow back into the speed reducing cavity, and the bottom surface of the oil return channel in the radial direction is arranged obliquely downwards from the motor cavity towards the speed reducing cavity, so that a liquid level difference exists between an oil inlet in the motor cavity of the oil return channel and an oil outlet in the speed reducing cavity, thereby being beneficial to the smooth flow of the oil from the motor cavity to the speed reducing cavity, reducing hydraulic resistance and lubrication friction and improving the backflow efficiency of the lubricating oil.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those skilled in the art that the drawings in the following description are of some embodiments of the utility model, and that other drawings may be obtained from these drawings without inventive effort.

FIG. 1 is a schematic view of a prior art construction (oil return device not shown) wherein the arrows indicate the direction of flow of the lubricating oil;

FIG. 2 is an isometric view of a powertrain provided in an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a powertrain according to an embodiment of the present utility model;

fig. 4 is a cross-sectional view of a bulkhead of a powertrain provided by an embodiment of the utility model.

The reference numerals are as follows:

100. a housing; 110. a motor cavity; 120. a deceleration chamber; 130. a housing; 140. a front end cover; 150. a rear end cover;

200. a partition plate; 210. a vent hole;

300. an oil return structure; 310. an oil return passage; 320. a first oil return hole; 330. a second oil return hole; 340. reinforcing ribs;

400. a first bearing;

500. a second bearing;

600. a reducer main shaft; 610. a vent passage;

700. a vent plug.

Detailed Description

In the description of the present utility model, it should be understood that, if there are descriptions of terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientation or positional relationship, it should be understood that the orientation or positional relationship shown based on the drawings is merely for convenience of description and simplification of the description, and does not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the presence of features defining "first" and "second" for descriptive purposes only, should not be interpreted as indicating or implying a relative importance or implicitly indicating the number of features indicated. Features defining "first", "second" may include at least one such defined feature, either explicitly or implicitly. If a description of "a plurality" is present, the generic meaning includes at least two, e.g., two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly stated and limited otherwise, terms such as "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; the connection may be mechanical connection, electrical connection, direct connection, indirect connection through an intermediate medium, communication between two elements or interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., as used herein, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Referring to fig. 2, a first aspect of the present utility model provides a powertrain, including: a housing 100 enclosing a power chamber; a partition 200 connected to the housing 100 and dividing the power chamber into a motor chamber 110 and a speed reduction chamber 120; and the oil return structure 300 comprises an oil return channel 310, wherein the oil return channel 310 is arranged in the shell 100 and is communicated with the motor cavity 110 and the speed reducing cavity 120, and the bottom surface of the oil return channel 310 in the radial direction is arranged obliquely downwards from the motor cavity 110 towards the speed reducing cavity 120.

In this scheme, through providing oil return structure 300 and making the lubricating oil in the motor chamber 110 can flow back to the speed reduction chamber 120 in, through setting up the radial bottom surface of oil return passageway 310 downwards slope from motor chamber 110 towards the direction of speed reduction chamber 120 for there is a liquid level difference in oil inlet in the motor chamber 110 of oil return passageway 310 and the oil-out in the speed reduction chamber 120, thereby help fluid smoothly to flow from motor chamber 110 to speed reduction chamber 120, reduce hydraulic resistance and lubrication friction, improved the backward flow efficiency of lubricating oil.

Referring to fig. 3, in some embodiments, the oil return structure 300 further includes: the first oil return hole 320 is arranged on the partition board 200 and is communicated with the motor cavity 110 and the speed reducing cavity 120; and a second oil return hole 330 disposed in the partition 200 and communicating the oil return channel 310 with the speed reducing chamber 120, wherein an oil inlet end of the oil return channel 310 is disposed at a side of the motor chamber 110 away from the speed reducing chamber 120.

In this solution, since the bottom of the motor cavity 110 is substantially divided into two oil collecting ports by the stator of the motor, by providing the first oil return hole 320, the lubricating oil on one side of the motor cavity 110 close to the speed reduction cavity 120 can smoothly flow back to the speed reduction cavity 120, and by providing the second oil return hole 330, the lubricating oil in the oil return channel 310 can be introduced into the speed reduction cavity 120, and since the oil inlet end of the oil return channel 310 is disposed on one side of the motor cavity 110 far from the speed reduction cavity 120, the lubricating oil on one side of the motor cavity 110 far from the speed reduction cavity 120 can smoothly flow back to the speed reduction cavity 120.

It should be noted that, when the oil collecting port of the motor cavity 110 near the side of the speed reducing cavity 120 is not accumulated with the oil, i.e. the oil surface does not cover the top of the second oil return hole 330, the top of the second oil return hole 330 may be used to balance the pressure between the speed reducing cavity 120 and the motor cavity 110.

In a further embodiment, the housing 110 further comprises: a housing 130; a front cover 140 coupled to a front end of the housing 130; and a rear cover 140 coupled to a rear end of the housing 130; the motor cavity 110 is surrounded by the partition board 200, the shell 130 and the front end cover 140, and the speed reducing cavity 120 is surrounded by the partition board 200, the shell 130 and the rear end cover 140.

In this scheme, the front end cover 140 and the rear end cover 140 are provided at both front and rear ends of the housing 100 to close the entire cavity formed by the housing 100 and enclose the entire power cavity.

In a further embodiment, the partition 200 is provided with a first bearing 400, the rear cover 140 is provided with a second bearing 500, the first bearing 400 and the second bearing 500 are fixed with a reducer main shaft 600, and the reducer main shaft 600 is disposed through the partition 200 by the first bearing 400.

In this embodiment, the first bearing 400 and the second bearing 500 are respectively disposed on the partition board 200 and the rear end cover 140 to mount the reducer main shaft 600, and the reducer main shaft 510 is coaxially and drivingly connected with the motor rotor shaft in the motor cavity 110 after passing through the partition board 200, and a transmission structure should be further disposed on the reducer main shaft 600 to be drivingly connected with the reducer in the reducer cavity 120.

Referring to fig. 2, in a further embodiment, the air vent plug 700 is further included, the air vent plug 520 is disposed on the housing 100 and is in communication with the power cavity, and the air vent plug 700 is used to balance the air pressure in the power cavity.

In this scheme, since the motor generates heat when it is operated, the heat causes the gas inside the motor to expand while sucking the outside air. A vent plug 700 is provided on the motor housing 100 to equalize the air pressure inside the motor.

Referring to fig. 4, in a further aspect of the present utility model, the partition board 200 is further provided with a vent hole 210 therethrough, and the vent hole 210 is communicated with the speed reducing chamber 120 and the motor chamber 110 for balancing the air pressure inside the motor chamber 110 and the speed reducing chamber 120. The vent hole 210 should be horizontally disposed higher than the first oil return hole 320 and the second oil return hole 330 to prevent the oil return hole from being blocked by the lubricating oil, so that the effect of communicating the motor cavity 110 with the decelerator cannot be achieved.

In this scheme, the air pressure between the speed reducing chamber 120 and the motor chamber 110 can be balanced by providing the vent holes 210 on the partition board 200, and since the speed reducing force is balanced with the air pressure of the motor chamber 110, the vent plug 700 can be separately provided to maintain the air pressure balance between the speed reducing chamber 120 and the motor chamber 110 relative to the outside, and by this arrangement, the sealing performance of the whole power assembly can be improved, so that the power assembly has the capability of completely preventing dust and not being damaged when being sprayed with water in a short time.

In a further embodiment, the reducer shaft 600 is provided with a vent passage 610, the vent passage 610 communicating the reduction chamber 120 with the motor chamber 110.

In this aspect, the shaft may employ a hollow shaft to form the vent passage 610 by providing the vent passage 610 in the decelerator spindle 600 to further maintain pressure balance between the motor chamber 110 and the deceleration chamber 120.

In a further embodiment, the oil return passage 310 has an inner diameter that diverges from the motor chamber 110 toward the speed reducing chamber 120.

It should be further noted that a portion of space should be reserved at the bottom of the speed reducing cavity 120, and the level of the portion of the hole is lower than the levels of the first oil return hole 320 and the second oil return hole 330, so as to avoid accumulation of lubricating oil in the speed reducing cavity 120, thereby affecting the oil return efficiency.

A second aspect of the utility model provides a vehicle comprising a powertrain as provided in the first aspect of the utility model.

Specifically, the powertrain transmits power to the wheels through a propeller shaft, a universal joint, or the like. Thus, the vehicle can be ensured to have stronger driving force and smoother and comfortable driving feeling. In the aspect of the control system, the control system receives and processes data through devices such as sensors, actuators and the like and sends instructions to the powertrain, so that various performances of the vehicle are optimized and coordinated.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by those skilled in the art within the scope of the utility model.

Claims (9)

1. A power assembly is characterized by comprising,

a housing (100) enclosing a power chamber;

a partition plate (200) connected to the housing (100) and dividing the power chamber into a motor chamber (110) and a speed reduction chamber (120); and

oil return structure (300), including oil return passageway (310), oil return passageway (310) set up in shell (100) and communicate in motor chamber (110) with speed reduction chamber (120), just oil return passageway (310) are in radial bottom surface follow motor chamber (110) orientation speed reduction chamber (120) direction downward sloping sets up.

2. The powertrain of claim 1, wherein the oil return structure (300) further includes:

a first oil return hole (320) which is provided in the partition plate (200) and communicates the motor chamber (110) with the deceleration chamber (120); and

the second oil return hole (330) is formed in the partition plate (200) and is communicated with the oil return channel (310) and the speed reduction cavity (120), and the oil inlet end of the oil return channel (310) is arranged on one side, away from the speed reduction cavity (120), in the motor cavity (110).

3. The powertrain according to claim 1, wherein the housing (100) further comprises:

a housing (130);

a front end cover (140) connected to the front end of the housing (130); and

a rear end cap (150) connected to the rear end of the housing (130);

the motor cavity (110) is surrounded by the partition board (200), the shell (130) and the front end cover (140), and the speed reducing cavity (120) is surrounded by the partition board (200), the shell (130) and the rear end cover (150).

4. A power assembly according to claim 3, characterized in that the partition (200) is provided with a first bearing (400), the rear end cap (150) is provided with a second bearing (500), the first bearing (400) and the second bearing (500) are fixed with a reducer main shaft (600), and the reducer main shaft (600) is arranged through the partition (200) by the first bearing (400).

5. The powertrain of claim 1, further comprising a vent plug (700), the vent plug (700) disposed on the housing (100) and in communication with the power cavity, the vent plug (700) configured to equalize air pressure within the power cavity.

6. The powertrain according to claim 1, wherein the partition (200) is further provided with a vent hole (210) therethrough, and the vent hole (210) is communicated with the speed reduction chamber (120) and the motor chamber (110) for balancing air pressure inside the motor chamber (110) and the speed reduction chamber (120).

7. The powertrain according to claim 4, characterized in that the reducer spindle (600) is provided with a ventilation channel (610), the ventilation channel (610) communicating the reduction chamber (120) with the motor chamber (110).

8. The powertrain according to claim 1, characterized in that the oil return passage (310) is provided with an inner diameter that diverges from the motor chamber (110) toward the speed reduction chamber (120).

9. A vehicle comprising a powertrain as claimed in any one of claims 1 to 8.