Structure for eliminating cavitation of oil duct of electric drive assembly and electric drive assembly

Abstract

The utility model provides a structure for eliminating cavitation of an oil duct of an electric drive assembly and the electric drive assembly, and the structure for eliminating cavitation of the oil duct of the electric drive assembly comprises an oil inlet which is arranged at the bottom end of the interior of a reduction gearbox shell of the electric drive assembly; and the oil blocking part is installed on the reduction gearbox shell, the oil blocking part and the reduction gearbox shell surround the oil inlet, and the oil blocking part is provided with a passing opening for cooling liquid to pass through. According to the structure for eliminating cavitation of the oil duct of the electric drive assembly and the electric drive assembly, the problem that the cavitation phenomenon is likely to be generated in the oil duct of the electric drive assembly can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle components, and in particular to a structure for eliminating cavitation in an oil passage of an electric drive assembly and an electric drive assembly. Background Art

[0002] Cavitation refers to the phenomenon that during the flow of liquid, gas is precipitated and bubbles are formed due to pressure changes. These bubbles are compressed and burst in the high-pressure area, causing damage to the product.

[0003] When the electric drive assembly is operating, the reducer gears rotate at high speed, causing pressure fluctuations within the housing. As the coolant flows, this pressure fluctuation causes gas to precipitate and form bubbles. If this bubbled coolant enters the oil inlet, the narrow oil passage will increase pressure. If these bubbles are compressed and ruptured in the high-pressure area, they can damage the product.

[0004] Cavitation can lead to reduced pump performance, including reduced flow, reduced head, and reduced shaft power. Since the motor's output power is directly related to the pump's load capacity, reduced pump performance will indirectly affect the motor's load capacity, preventing the motor from fully utilizing its performance. Utility Model Content

[0005] In view of this, the purpose of the present application is to provide a structure for eliminating cavitation in the oil passage of an electric drive assembly and an electric drive assembly, so as to solve the problem that cavitation is easily generated in the oil passage of the electric drive assembly.

[0006] According to the first aspect of the present utility model, a structure for eliminating cavitation in the oil channel of an electric drive assembly is provided, wherein the structure for eliminating cavitation in the oil channel of the electric drive assembly includes: an oil inlet, which is arranged at the bottom end inside the reduction gearbox housing of the electric drive assembly; an oil baffle, which is installed on the reduction gearbox housing, and the oil baffle and the reduction gearbox housing surround the oil inlet, and the oil baffle is provided with a through port for coolant to pass through.

[0007] Preferably, the oil baffle part includes: an oil baffle rib, which is installed in the reduction gear housing of the electric drive assembly, and the oil baffle rib is arranged at the upper part of the oil inlet; and an oil baffle plate, which is installed on the oil baffle rib, and the oil baffle plate, the oil baffle rib and the reduction gear housing surround the oil inlet.

[0008] Preferably, the reduction gearbox housing includes an end plate portion and a side plate portion surrounding the outer circumference of the end plate portion, and the oil inlet is provided at the bottom of the end plate portion.

[0009] Preferably, the oil-blocking rib is a strip-shaped plate member, the oil-blocking rib is connected to the end plate portion and the side plate portion, and the plate surface of the oil-blocking rib is perpendicular to the plate surface at the connection with the end plate portion.

[0010] Preferably, a first end of the oil-blocking rib in a width direction is connected to the end plate portion, and a first end of the oil-blocking rib in a length direction is connected to the side plate portion.

[0011] Preferably, the top end of the oil baffle plate is connected to the second end of the oil baffle rib in the width direction, and the bottom end of the oil baffle plate is in contact with the side plate portion.

[0012] Preferably, the second end of the oil baffle rib in the length direction is surrounded by the oil baffle plate and the reduction gearbox housing to form the through opening.

[0013] Preferably, a transmission gear is provided in the reduction gear housing, and the oil retaining rib is formed with an arc-shaped avoidance portion at a position corresponding to the transmission gear.

[0014] Preferably, the oil baffle is provided with a mounting groove for mounting a magnetic component on a side close to the oil inlet.

[0015] According to a second aspect of the present invention, an electric drive assembly is provided, wherein the electric drive assembly includes the above-mentioned structure for eliminating cavitation in the oil passage of the electric drive assembly.

[0016] The embodiment of the utility model discloses a structure for eliminating cavitation in the oil passage of an electric drive assembly and an electric drive assembly, wherein the oil inlet is arranged at the bottom end of the interior of the reduction gear housing of the electric drive assembly, that is, the oil storage area. Since the liquid level of the coolant is much higher than the oil inlet, and the density of the bubbles generated by the operation of the gearbox is much smaller than that of the coolant, the bubbles only exist on the surface of the coolant and will not reach the oil inlet. The oil baffle is installed on the reduction gear housing, and the oil baffle and the reduction gear housing surround the oil inlet. In addition, the oil baffle is provided with a through port for the coolant to pass through, so that the coolant can only enter the oil inlet from the through port, and the coolant mixed with the air can be buffered, thereby avoiding uneven oil inlet caused by splashing of the coolant. In this way, the problem of cavitation easily occurring in the oil passage of the electric drive assembly can be effectively solved.

[0017] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 It is a schematic diagram of a structure for eliminating cavitation in the oil passage of an electric drive assembly according to the utility model.

[0020] Figure 2 It is a schematic diagram of a portion of a structure for eliminating cavitation in an oil passage of an electric drive assembly according to the present invention.

[0021] Figure 3 It is a schematic diagram of an oil baffle for eliminating cavitation in the oil passage of an electric drive assembly according to the utility model.

[0022] Figure numerals: 1-oil baffle; 10-avoidance portion; 100-passageway; 2-oil baffle plate; 20-mounting groove; 3-oil inlet; 4-electric drive assembly; 40-reduction gearbox housing; 401-end plate; 402-side plate; 41-transmission gear. DETAILED DESCRIPTION

[0023] The following detailed description is provided to help the reader gain a comprehensive understanding of the methods, devices, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, devices, and / or systems described herein will be apparent upon understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein. Rather, except for operations that must occur in a particular order, changes may be made that will be apparent upon understanding the disclosure of this application. Furthermore, descriptions of features known in the art may be omitted for clarity and brevity.

[0024] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0025] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, it may be directly “on,” “connected to,” “coupled to,” “over,” or “overlaying” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on,” “directly connected to,” “directly coupled to,” “directly over,” or “directly covering” another element, there may be no other elements intervening therebetween.

[0026] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0027] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are used only to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Thus, a first member, component, region, layer, or portion in the examples described herein may also be referred to as a second member, component, region, layer, or portion without departing from the teachings of the examples.

[0028] For ease of description, spatial relational terms such as "above," "upper," "below," and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element would subsequently be "below" or "lower" relative to the other element. Thus, the term "above" includes both the orientations "above" and "below," depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0029] The terms used herein are intended to describe various examples only and are not intended to limit the examples. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form. The terms "include," "comprising," and "having" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0030] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0031] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0032] like Figures 1 to 3 As shown, according to the first aspect of the present utility model, a structure for eliminating cavitation in the oil passage of an electric drive assembly is provided. The structure for eliminating cavitation in the oil passage of the electric drive assembly includes an oil inlet 3 and an oil baffle.

[0033] In the following description, reference will be made to Figures 1 to 3 The specific structure of the above components of the electric drive assembly oil channel cavitation elimination structure and the connection relationship of the above components are described in detail.

[0034] like Figures 1 to 3 As shown, in an embodiment, the oil inlet 3 can be arranged at the bottom end of the interior of the reduction gear housing 40 of the electric drive assembly 4, that is, the oil inlet 3 is arranged in the oil storage area of ​​the electric drive assembly 4. Since the liquid level of the coolant (which can be cooling oil) is much higher than the oil inlet 3, and the density of the bubbles generated by the operation of the gearbox is much smaller than the coolant, the bubbles only exist on the surface of the coolant and will not reach the oil inlet 3, thereby preventing the bubbles from bursting in the high-pressure area and preventing damage to the product. The oil baffle can be installed on the reduction gear housing 40. The oil baffle and the reduction gear housing 40 are arranged to surround the oil inlet 3, and a through port 100 for the coolant to pass through is provided in the oil baffle, so that the coolant can only enter the oil inlet 3 from the through port 100, and the coolant mixed with air can be buffered, thereby avoiding uneven oil inlet caused by splashing of the coolant, thereby ensuring the operational stability and reliability of the electric drive assembly 4.

[0035] Preferably, Figure 1 and Figure 2 As shown, in an embodiment, the reduction gear housing 40 may be a box structure. Components such as a transmission gear 41 and a differential may be installed in the reduction gear housing 40. The reduction gear housing 40 may include an end plate portion 401 and a side plate portion 402. Components such as the transmission gear 41 and the differential may be installed on the end plate portion 401. The side plate portion 402 may be arranged in a circular manner on the outer periphery of the end plate portion 401, and the side plate portion 402 encloses components such as the transmission gear 41 therein. The oil inlet 3 may be opened at the bottom of the end plate portion 401, so that the setting height of the oil inlet 3 is lower than the liquid level of the coolant in the oil storage area to prevent bubbles from entering the oil inlet 3.

[0036] Preferably, Figures 1 to 3 As shown, in an embodiment, the oil baffle portion may include an oil baffle rib 1 and an oil baffle plate 2. The oil baffle rib 1 may be installed in the reduction gear housing 40 of the electric drive assembly 4. Preferably, the oil baffle rib 1 may be integrally formed with the reduction gear housing 40. The oil baffle rib 1 may be provided at the upper portion of the oil inlet 3. The oil baffle plate 2 may be installed on the oil baffle rib 1. The oil baffle plate 2, the oil baffle rib 1 and the reduction gear housing 40 cooperate to surround the oil inlet 3 inside, and leave a through port 100 for the coolant to pass through, so as to control the direction of the coolant flowing into the oil inlet 3, so that the coolant mixed with the air can be buffered, thereby avoiding uneven oil inlet caused by splashing of the coolant.

[0037] Preferably, Figure 1 and Figure 2 As shown, in the embodiment, the oil retaining rib 1 can be a strip-shaped plate. The oil retaining rib 1 can be connected to the end plate portion 401 and the side plate portion 402 to block the coolant. The plate surface of the oil retaining rib 1 can be perpendicular to the plate surface at the connection with the end plate portion 401. Further, preferably, the oil retaining rib 1 can be arranged obliquely in the reduction gearbox housing 40. Specifically, as Figure 1 As shown, the oil retaining rib 1 can be tilted downward from left to right. The first end of the width direction of the oil retaining rib 1 can be connected to the plate surface of the end plate portion 401, and the first end of the length direction of the oil retaining rib 1 (which can be as shown) can be connected to the plate surface of the end plate portion 401. Figure 1 The right end shown in FIG400 can be connected to the side plate portion 402.

[0038] More preferably, Figures 1 to 3 As shown, in an embodiment, the top end of the oil baffle plate 2 can be connected to the second end in the width direction of the oil baffle rib 1. Specifically, the second end in the width direction of the oil baffle rib 1 can be the end of the oil baffle rib 1 away from the end plate portion 401. A plurality of mounting posts can be provided on the lower surface of the oil baffle rib 1, and internal threads can be provided in the mounting posts, and the mounting posts are used to install bolts. A plurality of mounting holes can be provided at the top end of the oil baffle plate 2 for passing bolts. The oil baffle plate 2 and the oil baffle rib 1 can be connected by bolts. Preferably, the bottom end of the oil baffle plate 2 can be fitted with the side plate portion 402, and the top end of the oil baffle plate 2 can be fitted with the oil baffle rib 1, so that the oil baffle plate 2 can block the side facing the oil inlet 3 to limit the direction in which the coolant flows into the oil inlet 3.

[0039] Preferably, Figure 1 and Figure 3 As shown, in the embodiment, the second end of the oil retaining rib 1 in the length direction (which can be Figure 1 The left end of the oil baffle rib (shown as the left end) can be surrounded by the oil baffle plate 2 and the gearbox housing 40 to form the passage 100. Specifically, a gap is provided between the second end of the oil baffle rib 1 in the longitudinal direction and the side plate portion 402, and the oil baffle plate 2 only blocks the side facing the oil inlet 3. Therefore, the second end of the oil baffle rib 1 in the longitudinal direction, the side plate portion 402, the oil baffle plate 2, and the end plate portion 401 together form the passage 100, allowing coolant to flow through the passage 100 to the oil inlet 3.

[0040] In addition, preferably, Figure 1 and Figure 3As shown, in this embodiment, a transmission gear 41 may be installed in the reduction gear housing 40. The transmission gear 41 may be mounted on the end plate 401 of the reduction gear housing 40. The oil retaining rib 1 may have an arc-shaped relief portion 10 formed at a position corresponding to the transmission gear 41. Specifically, the oil retaining rib 1 may have a downwardly curved plate section (i.e., relief portion 10) formed near the transmission gear 41 to provide relief for the transmission gear 41.

[0041] Preferably, Figure 3 As shown, in an embodiment, a mounting groove 20 may be further provided on the side of the oil baffle 2 near the oil inlet 3. A magnetic attraction member (which may be a magnet) may be mounted in the mounting groove 20 to absorb metal impurities mixed in the coolant, thereby improving the quality of the coolant flowing into the oil inlet 3.

[0042] In addition, if Figure 2 As shown, according to the second aspect of the present utility model, an electric drive assembly 4 is provided, and the electric drive assembly 4 includes the structure for eliminating cavitation in the oil channel of the electric drive assembly as described above.

[0043] During use, the oil baffle 1 and the oil baffle 2 can block the coolant to control the direction of the coolant flowing into the oil inlet 3, so that the coolant mixed with air can be buffered, avoiding uneven oil inflow caused by coolant splashing. In addition, the oil inlet 3 is arranged in the oil storage area of ​​the electric drive assembly 4. Since the liquid level of the coolant is much higher than the oil inlet 3, and the density of the bubbles generated by the operation of the gearbox is much smaller than the coolant, the bubbles only exist on the surface of the coolant and will not reach the oil inlet 3, thereby avoiding the bubbles from bursting in the high-pressure area and preventing damage to the product. A magnetic suction part is also installed on the oil baffle 2, which can further eliminate the metal impurities generated in the initial stage of the product operation, ensure the continuity and uniformity of the coolant supply, avoid sudden pressure fluctuations in the coolant, and further improve the quality of the coolant flowing into the oil inlet 3.

[0044] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The scope of protection of the present application is not limited thereto. Although the present application has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed in the present application, or perform equivalent replacements for some of the technical features thereof. These modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the scope of protection of the claims.

Claims

1. A structure for eliminating cavitation in the oil passage of an electric drive assembly, provided in the electric drive assembly, characterized in that: The structure for eliminating cavitation in the oil passage of the electric drive assembly includes: An oil inlet is provided at the bottom end of the interior of the reduction gearbox housing of the electric drive assembly; The oil baffle is installed on the reduction gear box housing. The oil baffle and the reduction gear box housing surround the oil inlet. The oil baffle is provided with a through port for the coolant to pass through.

2. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 1, characterized in that: The oil shielding portion comprises: An oil retaining rib is installed in the reduction gearbox housing of the electric drive assembly, and the oil retaining rib is arranged above the oil inlet; and An oil baffle plate is installed on the oil baffle rib, and the oil baffle plate, the oil baffle rib and the reduction gearbox housing surround the oil inlet.

3. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 2, characterized in that: The reduction gear box housing includes an end plate portion and a side plate portion surrounding an outer circumference of the end plate portion, and the oil inlet is arranged at a bottom of the end plate portion.

4. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 3, characterized in that: The oil-blocking rib is a strip-shaped plate member, and the oil-blocking rib is connected to the end plate portion and the side plate portion. The plate surface of the oil-blocking rib is perpendicular to the plate surface at the connection with the end plate portion.

5. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 4, characterized in that: A first end of the oil blocking rib in a width direction is connected to the end plate portion, and a first end of the oil blocking rib in a length direction is connected to the side plate portion.

6. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 5, characterized in that: The top end of the oil baffle plate is connected to the second end of the oil baffle rib in the width direction, and the bottom end of the oil baffle plate is in contact with the side plate portion.

7. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 6, characterized in that: The second end of the oil baffle rib in the length direction is surrounded by the oil baffle plate and the reduction gearbox housing to form the through opening.

8. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 4, characterized in that: A transmission gear is arranged in the reduction gear housing, and an arc-shaped avoidance portion is formed on the oil retaining rib at a position corresponding to the transmission gear.

9. The structure for eliminating cavitation in the oil passage of an electric drive assembly according to claim 2, characterized in that: The oil baffle is provided with a mounting groove for mounting a magnetic attraction component on a side portion close to the oil inlet.

10. An electric drive assembly, characterized in that: The electric drive assembly includes the structure for eliminating cavitation in the oil passage of the electric drive assembly according to any one of claims 1 to 9.

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