Bridge

Abstract

The invention provides a bridge comprising a housing, the housing comprises an accommodating cavity, the accommodating cavity is used for accommodating a motor and a gear, and the housing is provided with a bottom wall; the bottom plate is connected to the bottom wall of the shell, a filtering cavity is defined between the bottom wall of the shell and the bottom plate, the bottom plate seals an opening of the filtering cavity, a first oil cavity is formed between the bottom wall and the bottom plate, and the first oil cavity is communicated with the containing cavity; the filter element is arranged between the bottom wall and the bottom plate, the filter element and the first oil cavity are separated, a second oil cavity and a third oil cavity are formed in the two sides of the filter element respectively, the first oil cavity and the second oil cavity are communicated through a second oil cavity oil inlet formed in the bottom plate, and oil can sequentially pass through the containing cavity, the first oil cavity, the second oil cavity and the third oil cavity. In the process that oil flows from the second oil cavity to the third oil cavity, impurities in the oil are filtered through the filter element.

Description

Technical Field

[0001] The present application belongs to the field of vehicle technology, and in particular relates to an electric bridge. Background Art

[0002] In an oil-cooled electric axle, the cleanliness of the engine oil plays a vital role in the life of the components in the electric axle and electrical safety, so it is necessary to set an oil filter to clean the engine oil in the oil-cooled electric axle.

[0003] Patent CN112413104A discloses a reducer oil circuit structure of an oil-cooled motor drive system assembly, which includes a gearbox housing, an oil pump, a primary filter, a secondary filter, a heat exchanger, etc., and has the following disadvantages.

[0004] (1) The oil-cooled motor drive system assembly uses many components, such as the oil pump, secondary filter, and heat exchanger, which all need to be bolted to the gearbox housing. The gearbox housing is equipped with multiple oil channels and interfaces, and all interfaces need to be sealed with seals, which makes the oil-cooled motor drive system assembly less reliable and more expensive.

[0005] (2) The primary filter is located inside the gearbox housing. The gearbox housing needs to be opened to replace or clean the primary filter, which is relatively difficult.

[0006] Patent CN115388162A discloses a transmission oil suction filter, which includes an upper housing, a lower housing, a sealing ring, a fastener, a nut, a filtering structure, a filter element, etc. The filter uses many parts, resulting in high costs. The transmission and filter housings need to be opened to replace or clean the filter element, which is relatively difficult and makes the after-sales maintenance cost high. Summary of the invention

[0007] The present application aims to provide an electric bridge to solve or alleviate at least one disadvantage of the prior art.

[0008] The embodiment of the present application proposes a bridge, which includes:

[0009] A housing, wherein the housing comprises a receiving cavity, the receiving cavity is used to receive the motor and the gear, and the housing has a bottom wall;

[0010] a bottom plate, the bottom plate being connected to the bottom wall of the housing, a filter cavity being defined between the bottom wall of the housing and the bottom plate, the bottom plate sealing an opening of the filter cavity, a first oil cavity being formed between the bottom wall and the bottom plate, the first oil cavity being communicated with the accommodating cavity; and

[0011] A filter element, wherein the filter element is arranged between the bottom wall and the bottom plate, the filter element and the first oil chamber are separated, a second oil chamber and a third oil chamber are arranged on both sides of the filter element, the first oil chamber and the second oil chamber are connected through a second oil chamber oil inlet formed on the bottom plate,

[0012] The oil can pass through the accommodating chamber, the first oil chamber, the second oil chamber and the third oil chamber in sequence. In the process of the oil flowing from the second oil chamber to the third oil chamber, impurities in the oil are filtered through the filter element.

[0013] In at least one possible implementation, the electric bridge further includes a magnet, which is disposed near an oil inlet of the second oil chamber, and the magnet is capable of absorbing metal impurities in the oil passing through the oil inlet of the second oil chamber.

[0014] In at least one possible embodiment, the bottom wall is provided with a raised bottom wall rib, and the bottom plate is provided with a bottom plate rib, and the bottom wall rib and the bottom plate rib are sealedly connected to separate the first oil chamber from the second oil chamber and the third oil chamber.

[0015] In at least one possible embodiment, the bottom wall guard rib and the bottom plate guard rib are annular, the bottom wall guard rib and the bottom plate guard rib surround the filter element, the first oil chamber surrounds the outer peripheral side of the second oil chamber and the third oil chamber, the bottom wall guard rib and the bottom plate guard rib relatively clamp the edge of the filter element, so that the filter element separates the second oil chamber and the third oil chamber.

[0016] In at least one possible implementation manner, the oil inlet of the second oil chamber is formed by penetrating the bottom plate baffle rib of the bottom plate.

[0017] In at least one possible embodiment, the bottom plate is provided with a bottom plate protrusion, the bottom plate protrusion supports the filter element, and / or

[0018] The bottom wall is provided with a filter cavity convex portion, and the filter cavity convex portion supports the filter element.

[0019] In at least one possible embodiment, a plurality of the bottom plate protrusions and the filter cavity protrusions are provided, and the bottom plate protrusions and the filter cavity protrusions are arranged opposite to each other, so as to fix the filter element from both sides of the filter element.

[0020] In at least one possible embodiment, the first oil chamber and the accommodating chamber are connected through a first oil chamber oil inlet, and a plurality of first oil chamber oil inlets are provided. The plurality of first oil chamber oil inlets are dispersedly arranged so that when the electric bridge is in a tilted state, the oil can still flow from the accommodating chamber into the first oil chamber.

[0021] In at least one possible implementation manner, the second oil chamber is located between the filter element and the bottom plate, and the third oil chamber is located between the filter element and the bottom wall.

[0022] In at least one possible implementation, when the electric bridge is installed on a vehicle, the filter cavity is located below the accommodating cavity.

[0023] By adopting the above technical solution, the present application can obtain at least one of the following advantages.

[0024] (1) The electric bridge of the present application has fewer components and fewer oil passages on the housing, so that fewer interfaces and seals are required, thereby increasing reliability and reducing cost.

[0025] (2) The filter element is installed between the bottom wall and the bottom plate of the housing, and no separate filter element housing is required. Therefore, the space occupied is small, which is convenient for packaging and easy to layout and install in the vehicle.

[0026] (3) The filter element is independent of the accommodating chamber, and the filter element can be easily replaced or cleaned by simply opening the bottom plate, so maintenance is convenient and the after-sales maintenance cost is low.

[0027] (4) The magnet can absorb the metal impurities that enter the second oil chamber, so that the metal impurities will not continue to pass through the filter element with the oil, reducing the blockage of the filter element and extending the life of the filter element. The metal impurities will not circulate with the oil, making the circulating oil cleaner. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 and Figure 2 A schematic structural diagram of an electric bridge according to an embodiment of the present application is shown.

[0029] Figure 3 An exploded view of a bridge according to an embodiment of the present application is shown.

[0030] Figure 4 A schematic structural diagram of a housing and a filter element of an electric bridge according to an embodiment of the present application is shown.

[0031] Figure 5 A schematic structural diagram of a housing of an electric bridge according to an embodiment of the present application is shown.

[0032] Figure 6 A partial cross-sectional view of a housing of an electric bridge according to an embodiment of the present application is shown.

[0033] Figure 7 A schematic structural diagram of a bottom plate and a magnet of an electric bridge according to an embodiment of the present application is shown.

[0034] Description of Reference Numerals

[0035] 1 housing 11 motor housing 12 transmission housing

[0036] 13 filter cavity 131 bottom wall retaining rib 1311 first sealing surface 1312 second sealing surface 132 filter cavity protrusion 133 third sealing surface

[0037] 14 First oil chamber oil inlet 14A Motor chamber oil inlet 14B Gear chamber oil inlet

[0038] 15 Exhaust

[0039] 2 Bottom plate 21 Bottom plate protrusion 22 Bottom plate retaining rib 23 Second oil chamber oil inlet

[0040] 3 Filter element

[0041] 4 Magnets

[0042] 5 Oil pump

[0043] 6 heat exchanger 61 heat exchanger channel

[0044] R1 first oil chamber R2 second oil chamber R3 third oil chamber DETAILED DESCRIPTION

[0045] In order to more clearly explain the above-mentioned purposes, features and advantages of the present application, the specific implementation methods of the present application are described in detail in this section in conjunction with the accompanying drawings. In addition to the various implementation methods described in this section, the present application can also be implemented in other different ways. Without violating the spirit of the present application, those skilled in the art can make corresponding improvements, deformations and substitutions, so the present application is not limited by the specific embodiments disclosed in this section. The scope of protection of the present application shall be subject to the claims.

[0046] The present application relates to the field of vehicle technology, and in particular to an electric bridge of a power unit of a pure electric vehicle and a hybrid electric vehicle, wherein the electric bridge can be used to drive wheels of the vehicle.

[0047] like Figures 1 to 7 As shown, an embodiment of the present application proposes an electric bridge, which includes a housing 1, a base plate 2, a filter element 3, a magnet 4, an oil pump 5, a heat exchanger 6, a motor, a transmission and a power electronic integrated module (PEU).

[0048] In this embodiment, the electric bridge can be a dual-motor electric bridge. In the axial direction of the electric bridge, the two motors can be located in the middle, and the two transmissions are respectively located at the two ends of the electric bridge, and the two transmissions can be used to connect the wheels on the left and right sides of the vehicle respectively.

[0049] like Figure 1 and Figure 2As shown, the housing 1 includes a motor housing 11 and a transmission housing 12, and the transmission housing 12 can be connected to both ends of the motor housing 11. The motor can be arranged inside the motor housing 11, the power electronics integrated module (PEU) can be arranged inside the motor housing 11, and the gears of the transmission can be arranged inside the transmission housing 12.

[0050] like Figures 3 to 5 As shown, the motor housing 11 may be provided with a receiving chamber and a filter chamber 13, the middle part of the receiving chamber may be a motor chamber for receiving the motor and the power electronic integrated module (PEU), the two sides of the motor chamber may be gear chambers for receiving the transmission gear, and the transmission housing 12 may close the opening of the gear chamber. The filter chamber 13 and the receiving chamber may be connected through the first oil chamber oil inlet 14. When the electric bridge is installed on the vehicle, the opening of the filter chamber 13 may face the bottom, the filter chamber 13 is located below the receiving chamber, and the oil in the receiving chamber flows into the filter chamber 13 through the first oil chamber oil inlet 14 under the action of gravity. The housing 1 has a bottom wall, and the bottom plate 2 may be connected to the bottom wall of the housing 1 by bolts, so as to define the filter chamber 13 between the bottom wall of the housing 1 and the bottom plate 2. The bottom plate 2 closes the opening of the filter chamber 13.

[0051] The opening of the filter chamber 13 is closed by the bottom plate 2, and a first oil chamber R1 can be defined between the shell 1 and the bottom plate 2. The first oil chamber R1 and the accommodating chamber are connected through the first oil chamber oil inlet 14, and the oil in the accommodating chamber can flow into the first oil chamber R1 through the first oil chamber oil inlet 14.

[0052] like Figure 4 and Figure 5 As shown, the first oil chamber oil inlet 14 can be provided with multiple, for example, the first oil chamber oil inlet 14 can be provided with four, of which two first oil chamber oil inlets are motor chamber oil inlets 14A, which can be connected to the motor chamber, and the other two first oil chamber oil inlets are gear chamber oil inlets 14B, which can be connected to the gear chamber of the transmission. The oil can flow from the motor chamber and / or the gear chamber into the first oil chamber R1 through the first oil chamber oil inlet 14.

[0053] The first oil chamber R1 may be annular, for example, the first oil chamber R1 may be rectangular. The four first oil chamber oil inlets 14 may be located at the four sides of the rectangle of the first oil chamber R1, respectively, so that the plurality of first oil chamber oil inlets 14 are dispersed. When the vehicle with the electric bridge installed tilts forward, backward, left and right at different angles, the plurality of first oil chamber oil inlets 14 dispersed in this way can easily make the oil in the motor chamber and / or the gear chamber flow into the first oil chamber R1, so that the first oil chamber R1 is always kept in a state of having oil.

[0054] like Figures 4 to 6As shown, the bottom of the filter cavity 13 , that is, the bottom wall of the motor housing 11 , may be provided with a raised bottom wall retaining rib 131 , the bottom wall retaining rib 131 may be annular, and the filter element 3 is provided on the inner side of the bottom wall retaining rib 131 .

[0055] The filter element 3 is provided with a second oil chamber R2 and a third oil chamber R3 on both sides, the second oil chamber R2 is defined between the filter element 3 and the bottom plate 2, and the third oil chamber R3 is defined between the filter element 3 and the bottom wall of the motor housing 11. The oil can pass through the filter element 3 and flow from the second oil chamber R2 to the third oil chamber R3. In this process, the filter element 3 can filter impurities in the oil. The filter element 3 can be a combined filter element with a multi-stage filtering structure, capable of primary filtering and fine filtering. The first oil chamber R1 can surround the outside of the filter element 3, and the first oil chamber R1 can be located on the outer peripheral side of the second oil chamber R2 and the third oil chamber R3, and the first oil chamber R1 surrounds the second oil chamber R2 and the third oil chamber R3. The area surrounded by the bottom wall retaining rib 131 is the third oil chamber R3, and the bottom wall retaining rib 131 separates the first oil chamber R1 and the third oil chamber R3.

[0056] The bottom of the third oil chamber R3 (the bottom wall of the motor housing 11) may be provided with a filter chamber protrusion 132, which may be located in the area surrounded by the bottom wall retaining ribs 131. The filter chamber protrusion 132 may support and fix the filter element 3 to prevent the filter element 3 from deformation.

[0057] The filter chamber convex portion 132 may be columnar, and a plurality of filter chamber convex portions 132 may be provided, and the plurality of filter chamber convex portions 132 may form a rectangular array, and the gaps between the plurality of filter chamber convex portions 132 may form an oil channel in the third oil chamber R3, and oil may flow in the oil channel.

[0058] like Figure 6 and Figure 7 As shown, the bottom plate 2 is provided with a bottom plate convex portion 21, which is located in the central area of ​​the bottom plate 2. The bottom plate convex portion 21 can support and fix the filter element 3 to prevent the filter element 3 from deforming. The bottom plate convex portion 21 and the filter cavity convex portion 132 can be arranged opposite to each other, and the filter element 3 is fixed from both sides of the filter element 3 so that the filter element 3 is not easily deformed.

[0059] The bottom plate protrusion 21 may be truncated cone-shaped, and a plurality of bottom plate protrusions 21 may be provided, and the plurality of bottom plate protrusions 21 may form a rectangular array, and the gaps between the plurality of bottom plate protrusions 21 may form an oil channel in the second oil chamber R2, and the oil may flow in the oil channel.

[0060] The bottom plate 2 is provided with a raised bottom plate retaining rib 22, which may be annular and surround the filter element 3. The bottom plate retaining rib 22 and the bottom wall retaining rib 131 are relatively abutted, and the bottom wall retaining rib 131 and the bottom plate retaining rib 22 can relatively clamp the edge of the filter element 3, so that the filter element 3 is sealed to separate the second oil chamber R2 and the third oil chamber R3.

[0061] Reference Figures 4 to 6 A groove may be formed at the inner periphery of the bottom wall retaining rib 131 and / or the bottom plate retaining rib 22, in which the edge of the filter element 3 is clamped, and the thickness of the edge of the filter element 3 may be less than the thickness of the middle portion thereof. The outer periphery of the bottom wall retaining rib 131 and the bottom plate retaining rib 22 may be formed into a flat sealing surface to achieve contact sealing.

[0062] More specifically, the bottom wall retaining rib 131 may include a first sealing surface 1311 and a second sealing surface 1312. The first sealing surface 1311 and the second sealing surface 1312 may form a step shape, and the first sealing surface 1311 is located radially inside the second sealing surface 1312. Under the pressure of the bottom plate 2, the first sealing surface 1311 abuts against the edge of the filter element 3, thereby separating the second oil chamber R2 from the third oil chamber R3. Under the pressure of the bottom plate 2, the second sealing surface 1312 and the bottom plate retaining rib 22 are sealedly connected, thereby separating the first oil chamber R1 from the second oil chamber R2 and the third oil chamber R3.

[0063] The outer periphery of the filter cavity 13, namely the bottom wall of the motor housing 11, can form a third sealing surface 133, and the bottom plate 2 and the third sealing surface 133 are tightly and tightly connected to prevent oil from leaking out of the first oil cavity R1.

[0064] It is understandable that a sealing ring or a sealing gasket etc. may be appropriately provided at one or more sealing locations.

[0065] like Figure 1 and Figure 5 As shown, the oil pump 5 and the heat exchanger 6 are both connected to the shell 1, the third oil chamber R3 is provided with a discharge port 15, the discharge port 15 can be connected to the oil inlet of the oil pump 5, the oil outlet of the oil pump 5 can be connected to the heat exchanger 6 through the heat exchanger channel 61, and the heat exchanger channel 61 can be formed in the shell 1.

[0066] like Figure 7 As shown, the bottom plate retaining rib 22 may be provided with a second oil chamber oil inlet 23, which penetrates the bottom plate retaining rib 22, and the first oil chamber R1 and the second oil chamber R2 are connected through the second oil chamber oil inlet 23. The second oil chamber oil inlet 23 is located on the bottom plate 2, so it is easy to process.

[0067] The magnet 4 can be mounted on the bottom plate 2, the magnet 4 is close to the oil inlet 23 of the second oil chamber, and the magnet 4 can be located in the second oil chamber R2. The metal impurities in the oil entering the second oil chamber R2 from the first oil chamber R1 can be adsorbed by the magnet 4 and retained in the second oil chamber R2. In this way, these metal impurities will not pass through the filter element 3, nor will they circulate with the oil, making the circulating oil cleaner.

[0068] The above embodiments of the present application can achieve one or more of the following advantages:

[0069] (1) The electric bridge of the present application has fewer components and fewer oil passages on the housing, thereby having fewer interfaces and seals, and thus has higher reliability and lower cost.

[0070] (2) The filter element 3 is installed between the housing 1 and the bottom plate 2, and no separate filter element housing is required. Therefore, the space occupied is small, which is convenient for packaging and easy to lay out and install in the vehicle.

[0071] (3) The filter element 3 is independent of the accommodating cavity, and the filter element 3 can be easily replaced or cleaned by simply opening the bottom plate 2, so maintenance is convenient and the after-sales maintenance cost is low.

[0072] (4) The magnet 4 can absorb the metal impurities that enter the second oil chamber, so that the metal impurities will not continue to pass through the filter element 3 with the oil, nor will they circulate with the oil, making the circulating oil cleaner.

[0073] It should be understood that the above embodiments are merely exemplary and are not intended to limit the present application. Those skilled in the art may make various modifications and changes to the above embodiments under the guidance of the present application without departing from the scope of the present application.

[0074] (1) Although the above embodiment is a dual-motor bridge, the present application is not limited thereto, and a similar housing and base plate can also be used for a single-motor bridge.

[0075] (2) Although the above embodiment has multiple bottom plate protrusions 21 and filter chamber protrusions 132, and the gaps between the multiple bottom plate protrusions 21 and the multiple filter chamber protrusions 132 form a flow channel, the present application is not limited thereto. The bottom plate protrusions and the filter chamber protrusions can also form a flow channel by their own shapes without having to provide multiple independent protrusions. The present application also does not limit the shape of the protrusions. For example, the protrusions can also be formed in strips, grids, etc.

[0076] (3) The relative arrangement of the bottom plate protrusion 21 and the filter chamber protrusion 132 in the above embodiment means that they are relatively arranged as a whole, that is, they both protrude toward the filter element 3. The bottom plate protrusion and the filter chamber protrusion do not necessarily have to be arranged one by one or oppositely.

[0077] It should be understood that at least some aspects or features of the above-mentioned implementation modes, embodiments or examples may be appropriately combined.

[0078] It is understood that in the present application, when the number of parts or components is not particularly limited, the number may be one or more, and the multiple here means two or more. For the case where the number of parts or components shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., the specific number is usually exemplary and not restrictive, and it can be understood as multiple, that is, two or more, but this does not mean that the present application excludes the case of one.

[0079] In the present application, unless otherwise clearly stated or limited, the terms such as "install", "assemble", "assemble", "connect", "connect", "couple", "link", "abut", "connect", "interconnect", "intercommunication", "conduction", "fixation", "fastening" and the like should be understood in a broad sense, for example, they can be direct or indirect. For example, regarding connection, it can be a fixed connection, a detachable connection, or an integral one; 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, regarding connectivity / conduction, it can be direct connectivity / conduction, or it can be indirect connectivity / conduction via an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0080] In the present application, unless otherwise clearly stated or limited, a component disposed on / installed on / located on / accommodated on / placed in, within, inside, etc. another component may be any of the following two situations: a part or most of the one component is located in the other component; and the one component is completely accommodated in the other component.

[0081] Although the present application is described in detail using the above-mentioned embodiments, it is obvious to those skilled in the art that the present application is not limited to the embodiments described in this specification. The present application can be modified and implemented as a modified embodiment without departing from the subject matter and scope of the present application as determined by the claims. Therefore, the description in this specification is for the purpose of illustration and does not have any restrictive meaning for the present application.

Claims

1. A bridge, characterized in that: It includes: A housing (1), the housing (1) comprising a housing cavity, the housing cavity being used to accommodate a motor and a gear, the housing (1) having a bottom wall; A bottom plate (2), the bottom plate (2) being connected to the bottom wall of the housing (1), a filter chamber (13) being defined between the bottom wall of the housing (1) and the bottom plate (2), the bottom plate (2) sealing an opening of the filter chamber (13), a first oil chamber (R1) being formed between the bottom wall and the bottom plate (2), the first oil chamber (R1) being in communication with the accommodating chamber; as well as A filter element (3), the filter element (3) being arranged between the bottom wall and the bottom plate (2), the filter element (3) and the first oil chamber (R1) being separated, a second oil chamber (R2) and a third oil chamber (R3) being arranged on both sides of the filter element (3), the first oil chamber (R1) and the second oil chamber (R2) being connected via a second oil chamber oil inlet (23) formed on the bottom plate (2), The oil can pass through the accommodating chamber, the first oil chamber (R1), the second oil chamber (R2) and the third oil chamber (R3) in sequence, and in the process of the oil flowing from the second oil chamber (R2) to the third oil chamber (R3), impurities in the oil are filtered through the filter element (3).

2. The bridge according to claim 1, characterized in that: The bridge further comprises a magnet (4), which is arranged near the oil inlet (23) of the second oil chamber, and the magnet (4) is capable of absorbing metal impurities in the oil passing through the oil inlet (23) of the second oil chamber.

3. The bridge according to claim 1, characterized in that: The bottom wall is provided with a raised bottom wall retaining rib (131), and the bottom plate (2) is provided with a bottom plate retaining rib (22). The bottom wall retaining rib (131) and the bottom plate retaining rib (22) are sealedly connected to separate the first oil chamber (R1) from the second oil chamber (R2) and the third oil chamber (R3).

4. The bridge according to claim 3, characterized in that: The bottom wall retaining rib (131) and the bottom plate retaining rib (22) are annular, and the bottom wall retaining rib (131) and the bottom plate retaining rib (22) surround the filter element (3). The first oil chamber (R1) surrounds the outer peripheral side of the second oil chamber (R2) and the third oil chamber (R3). The bottom wall retaining rib (131) and the bottom plate retaining rib (22) relatively clamp the edge of the filter element (3), so that the filter element (3) separates the second oil chamber (R2) and the third oil chamber (R3).

5. The bridge according to claim 3, characterized in that: The second oil chamber oil inlet (23) is formed by penetrating the bottom plate retaining rib (22) of the bottom plate (2).

6. The bridge according to claim 1, characterized in that: The bottom plate (2) is provided with a bottom plate protrusion (21), the bottom plate protrusion (21) supports the filter element (3), and / or The bottom wall is provided with a filter cavity convex portion (132), and the filter cavity convex portion (132) supports the filter element (3).

7. The bridge according to claim 6, characterized in that: A plurality of the bottom plate convex portions (21) and the filter chamber convex portions (132) are provided, and the bottom plate convex portions (21) and the filter chamber convex portions (132) are arranged opposite to each other, so as to fix the filter element (3) from both sides of the filter element (3).

8. The bridge according to claim 1, characterized in that: The first oil chamber (R1) and the accommodating chamber are connected via a first oil chamber oil inlet (14), and a plurality of first oil chamber oil inlets (14) are provided. The plurality of first oil chamber oil inlets (14) are dispersedly arranged so that oil can still flow from the accommodating chamber into the first oil chamber (R1) when the bridge is in a tilted state.

9. The bridge according to claim 1, characterized in that: The second oil chamber (R2) is located between the filter element (3) and the bottom plate (2), and the third oil chamber (R3) is located between the filter element (3) and the bottom wall.

10. The bridge according to claim 1, characterized in that: When the electric bridge is installed on a vehicle, the filter cavity (13) is located below the accommodating cavity.

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