Ventilation device for bridge driving system and bridge driving system

Abstract

The utility model provides a ventilation device for a bridge driving system and the bridge driving system, the ventilation device comprises a ventilation plug, and the ventilation plug comprises a first ventilation cavity and a second ventilation cavity; a second ventilation cavity; the valve is arranged between the first ventilation cavity and the second ventilation cavity, the first ventilation cavity and the second ventilation cavity can be communicated or separated through the valve, when the air pressure difference of the first ventilation cavity and the second ventilation cavity is smaller than a preset threshold value, the valve is kept closed, and when the air pressure difference of the first ventilation cavity and the second ventilation cavity is smaller than the preset threshold value, the valve is closed. When the air pressure difference between the first ventilation cavity and the second ventilation cavity is larger than or equal to the preset threshold value, the valve is opened, and the first ventilation cavity and the second ventilation cavity are communicated.

Description

Technical Field

[0001] The present application relates to a ventilation device for a bridge drive system and a bridge drive system. Background Art

[0002] Figure 1 The structural schematic diagram of a possible bridge drive system is shown. The bridge drive system includes a housing 1, a motor 3, a transmission 4, a first valve B1, and a second valve B2. The housing 1 includes a first housing 11 for accommodating the motor 3 and a second housing 12 for accommodating the transmission 4, and the first housing 11 and the second housing 12 are separated. The first housing 11 is provided with a first valve B1 for communicating the inside of the first housing 11 with the outside, and the second housing 12 is provided with a second valve B2 for communicating the inside of the second housing 12 with the outside.

[0003] In the above solution, the failure of any one of the valves will affect the normal operation of the bridge drive system. And separately setting two valves in the bridge drive system results in a large number of parts of the bridge drive system, a complex assembly process, and a high risk of valve detachment when installing the valves at two different positions on the housing. Utility Model Content

[0004] The present application aims to provide a ventilation device for a bridge drive system and a bridge drive system, so that the ventilation device has a long service life and high reliability.

[0005] An embodiment of the present application provides a ventilation device for a bridge drive system. The ventilation device includes a ventilation plug, and the ventilation plug includes:

[0006] A first ventilation cavity;

[0007] A second ventilation cavity; and

[0008] A valve disposed between the first ventilation cavity and the second ventilation cavity, and the valve can connect or separate the first ventilation cavity and the second ventilation cavity.

[0009] When the pressure difference between the first ventilation cavity and the second ventilation cavity is less than a predetermined threshold, the valve remains closed to separate the first ventilation cavity and the second ventilation cavity.

[0010] When the pressure difference between the first ventilation cavity and the second ventilation cavity is greater than or equal to the predetermined threshold, the valve opens to connect the first ventilation cavity and the second ventilation cavity.

[0011] In at least one possible embodiment, the vent plug further includes a filtering member, which includes a first filtering member and a second filtering member. The first filtering member is disposed in the first ventilation cavity, such that the first ventilation cavity communicates with the outside atmosphere via the first filtering member. The second filtering member is disposed in the second ventilation cavity, such that the second ventilation cavity communicates with the outside atmosphere via the second filtering member.

[0012] In at least one possible embodiment, the filtering member is a filter membrane, which allows gas to pass bidirectionally and can block the passage of solids and liquids.

[0013] In at least one possible embodiment, the ventilation device further includes a connecting pipe, which is used to connect the vent plug to the housing of the bridge drive system. The connecting pipe includes a first connecting pipe and a second connecting pipe. The first connecting pipe and the second connecting pipe are separated. The first connecting pipe communicates with the first ventilation cavity, and the second connecting pipe communicates with the second ventilation cavity.

[0014] In at least one possible embodiment, the first connecting pipe and the second connecting pipe are integrally formed.

[0015] This application also provides a bridge drive system, which includes the ventilation device according to any one of the above technical solutions.

[0016] In at least one possible embodiment, the bridge drive system includes a housing, a motor, and a transmission.

[0017] The housing forms a first chamber for accommodating the motor and a second chamber for accommodating the transmission. The first chamber communicates with the first ventilation cavity, and the second chamber communicates with the second ventilation cavity.

[0018] In at least one possible embodiment, the first chamber and the second chamber are separated by a partition wall. The ventilation device is disposed on the top of the housing, and the ventilation device corresponds to the position inside the housing where the partition wall is located.

[0019] In at least one possible embodiment, the bridge drive system further includes a shaft member passing through the partition wall, and a sealing device is disposed between the shaft member and the partition wall.

[0020] In at least one possible embodiment, the bridge drive system includes only one such ventilation device.

[0021] By adopting the above technical solutions, when the first ventilation cavity or the second ventilation cavity fails, the other ventilation cavity can be used as a backup, so that the ventilation device can still achieve ventilation, prolonging the service life of the ventilation device and improving reliability. Brief Description of the Drawings

[0022] Figure 1 The schematic structural diagram of a possible bridge drive system is shown.

[0023] Figure 2 The schematic structural diagram of the bridge drive system according to an embodiment of the present application is shown.

[0024] Figure 3 The schematic structural diagram of the ventilation device of the bridge drive system according to an embodiment of the present application is shown.

[0025] Figure 4 The schematic diagram of the ventilation device of the bridge drive system according to an embodiment of the present application when the pressure of the first ventilation chamber is greater than that of the second ventilation chamber is shown.

[0026] Figure 5 The schematic diagram of the ventilation device of the bridge drive system according to an embodiment of the present application when the pressure of the first ventilation chamber is less than that of the second ventilation chamber is shown.

[0027] Description of the Reference Numerals

[0028] 1 Housing 11 First housing 111 First housing air hole 12 Second housing 121 Second housing air hole 13 Partition wall

[0029] 2 Ventilation device 21 Ventilation plug 211 First ventilation chamber 212 Second ventilation chamber 213 Filter member 2131 First filter member 2132 Second filter member 214 Partition portion 215 Valve

[0030] 22 Connecting pipe 221 First connecting pipe 222 Second connecting pipe

[0031] 3 Motor 31 Rotor shaft

[0032] 4 Transmission 41 Output shaft

[0033] 5 Sealing device

[0034] 6 Power electronics unit

[0035] C1 First chamber C2 Second chamber Detailed Embodiments

[0036] In order to more clearly elaborate the above-mentioned objects, features, and advantages of the present application, the detailed embodiments of the present application are described in detail in this part in conjunction with the drawings. In addition to the various embodiments described in this part, the present application can also be implemented in other different ways. Without departing from the spirit of the present application, those skilled in the art can make corresponding improvements, deformations, and substitutions. Therefore, the present application is not limited by the specific embodiments disclosed in this part. The protection scope of the present application shall be subject to the claims.

[0037] It should be understood that the drawings are used to schematically show the bridge drive system of the present application, especially the structural principle and basic structure of the ventilation device. The components in the drawings do not have to be drawn to scale.

[0038] As Figures 2 to 5 shown, an embodiment of the present application provides a bridge drive system, which includes a housing 1, a ventilation device 2, a motor 3, a transmission 4, a sealing device 5, and a power electronic unit 6 (Power Electronic Unit, PEU).

[0039] The housing 1 includes a first housing 11 and a second housing 12. A partition wall 13 is formed between the first housing 11 and the second housing 12. The partition wall 13 divides the interior of the housing 1 into a first chamber C1 and a second chamber C2. The first chamber C1 can be used to accommodate the motor 3, and the second chamber C2 can be used to accommodate the transmission 4.

[0040] As Figure 3 shown, the first housing 11 can be provided with a first housing air hole 111, and the first housing air hole 111 communicates the first chamber C1 with the outside. The second housing 12 can be provided with a second housing air hole 121, and the second housing air hole 121 communicates the second chamber C2 with the outside.

[0041] It should be understood that the first housing 11 and the second housing 12 can be manufactured separately or integrally. Optionally, the housing 1 can be made of aluminum alloy material, and the first housing 11 and the second housing 12 are formed together by forging.

[0042] As Figure 2 and Figure 3 shown, the motor 3 includes a rotor shaft 31 (shaft member), and the transmission 4 includes an output shaft 41. The rotor shaft 31 can extend from the first chamber C1 to the second chamber C2, and the rotor shaft 31 can transmit torque and rotational power to the output shaft 41 of the transmission 4 through the transmission 4. The power electronic unit 6 can be installed on the first housing 11, and the power electronic unit 6 is used to control the rotation of the motor 3.

[0043] The sealing device 5 can be arranged between the rotor shaft 31 and the partition wall 13. For example, the sealing device 5 can be annular. The second chamber C2 can accommodate a liquid such as engine oil. And this part of the engine oil is not expected to enter the first chamber C1. The sealing device 5 can prevent the engine oil from flowing from the second chamber C2 into the first chamber C1.

[0044] The ventilation device 2 can be arranged at the top of the housing 1, and the ventilation device 2 can correspond to the position where the housing 1 has a partition wall 13 inside.

[0045] The ventilation device 2 includes a ventilation plug 21 and a connecting pipe 22. The ventilation plug 21 can be connected to the first housing air hole 111 and the second housing air hole 121 through the connecting pipe 22.

[0046] The connecting pipe 22 can include a first connecting pipe 221 and a second connecting pipe 222. The first connecting pipe 221 and the second connecting pipe 222 are separated and not interconnected, so as to prevent the liquid (such as engine oil) in the second chamber C2 from entering the first chamber C1 through the connecting pipe.

[0047] Furthermore, the first connecting pipe 221 and the second connecting pipe 222 can be connected together. For example, the first connecting pipe 221 and the second connecting pipe 222 can be integrally formed, or rather, the first connecting pipe 221 and the second connecting pipe 222 are manifested as two independent channels of a pipe member. The first connecting pipe 221 and the second connecting pipe 222 connected together in this way can have higher strength, making the connecting pipe 22 not easily damaged or detached. Of course, the present application is not limited to this.

[0048] The ventilation plug 21 includes a first ventilation chamber 211, a second ventilation chamber 212, a filtering member 213, a separating portion 214 and a valve 215.

[0049] Both the separating portion 214 and the valve 215 are disposed between the first ventilation chamber 211 and the second ventilation chamber 212. The valve 215 can move to connect or separate the first ventilation chamber 211 and the second ventilation chamber 212.

[0050] When the air pressure difference between the first ventilation chamber 211 and the second ventilation chamber 212 is less than a predetermined threshold value, the valve 215 remains closed to separate the first ventilation chamber 211 and the second ventilation chamber 212. When the air pressure difference between the first ventilation chamber 211 and the second ventilation chamber 212 is greater than or equal to the predetermined threshold value, the valve 215 can open to connect the first ventilation chamber 211 and the second ventilation chamber 212.

[0051] The first ventilation chamber 211 and the first chamber C1 can be connected through the first connecting pipe 221, and the second ventilation chamber 212 and the second chamber C2 can be connected through the second connecting pipe 222. The bridge drive system can include only one ventilation device 2. Through one ventilation device 2, the first chamber C1 and the second chamber C2 can be connected to the outside to maintain a gas environment. This can reduce the number of parts and simplify the assembly process.

[0052] The filtering member 213 includes a first filtering member 2131 and a second filtering member 2132. The filtering member 213 can be a filter membrane, allowing gas to pass through bidirectionally and blocking solids and liquids. For example, using a filter membrane of Gore Company can achieve the above functions.

[0053] The first filtering member 2131 is disposed in the first ventilation cavity 211. The gas in the first ventilation cavity 211 can be discharged from the ventilation plug 21 through the first filtering member 2131, and the external gas can also enter the first ventilation cavity 211 through the first filtering member 2131.

[0054] The second filtering member 2132 is disposed in the second ventilation cavity 212. The gas in the second ventilation cavity 212 can be discharged from the ventilation plug 21 through the second filtering member 2132, and the external gas can also enter the second ventilation cavity 212 through the second filtering member 2132.

[0055] External liquid and solid pollutants will not enter the inside of the ventilation plug 21 through the filtering member 213, and thus will not enter the housing 1. The liquid (such as engine oil) in the housing 1 will not leak out through the ventilation plug 21 either.

[0056] The valve 215 can prevent engine oil (engine oil vapor) from freely flowing into the first ventilation cavity 211 and then into the first connecting pipe 221 and the first chamber C1. It can be understood that the valve 215 can be opened only when the pressure difference between the first ventilation cavity 211 and the second ventilation cavity 212 is greater than or equal to a predetermined threshold. Under normal circumstances, the first ventilation cavity 211 and the second ventilation cavity 212 are independent and separated.

[0057] Under normal operating conditions, the first ventilation cavity 211 is communicated with the outside through the first filtering member 2131. The gas in the first chamber C1 can enter the first ventilation cavity 211 through the first connecting pipe 221, and then can be discharged from the ventilation plug 21 through the first filtering member 2131. When the air pressure in the first chamber C1 decreases, the external gas can also enter the first chamber C1 through the above path.

[0058] The second ventilation cavity 212 is communicated with the outside through the second filtering member 2132. The gas in the second chamber C2 can enter the second ventilation cavity 212 through the second connecting pipe 222, and then can be discharged from the ventilation plug 21 through the second filtering member 2132. When the air pressure in the second chamber C2 decreases, the external gas can also enter the second chamber C2 through the above path.

[0059] Refer to Figure 4 and Figure 5 to illustrate two situations where the valve 215 opens. Figure 4 and Figure 5 The arrows in indicate the air flow direction.

[0060] Refer to Figure 4, as the first filtering member 2131 becomes blocked, it is a backup solution when the first filtering member 2131 fails. As the temperature of the bridge drive system rises, the air pressure in the first chamber C1 increases accordingly. Until the air pressure increases to make the pressure difference between the first ventilation chamber 211 and the second ventilation chamber 212 reach the predetermined threshold of the valve 215, the valve 215 can open, and the gas in the first ventilation chamber 211 can flow into the second ventilation chamber 212, and then the gas in the first chamber C1 can be discharged via the second filtering member 2132 to reduce the air pressure.

[0061] Refer to Figure 5 , as the second filtering member 2132 becomes blocked, it is a backup solution when the second filtering member 2132 fails. As the temperature of the bridge drive system rises, the air pressure in the second chamber C2 increases accordingly. Until the air pressure increases to make the pressure difference between the first ventilation chamber 211 and the second ventilation chamber 212 reach the predetermined threshold of the valve 215, the valve 215 can open, and the gas in the second ventilation chamber 212 can flow into the first ventilation chamber 211, and then the gas in the second chamber C2 can be discharged via the first filtering member 2131 to reduce the air pressure.

[0062] It can be understood that when the first filtering member 2131 or the second filtering member 2132 fails and the air pressure in the first chamber C1 or the second chamber C2 decreases as the temperature of the bridge drive system decreases, as long as the pressure difference between the first ventilation chamber 211 and the second ventilation chamber 212 exceeds the predetermined threshold, the valve 215 can also open.

[0063] It can be understood that the first ventilation chamber 211 and the second ventilation chamber 212 can be backup for each other. When the first ventilation chamber 211 or the second ventilation chamber 212 fails, the other ventilation chamber can at least temporarily replace the failed ventilation chamber, so that the bridge drive system can still maintain operation, extend the service life of the ventilation device, and improve reliability.

[0064] This application is not limited to the above embodiments. Those skilled in the art can make various modifications to the above embodiments of this application under the teaching of this application without departing from the scope of this application. In addition, the following explanations are also made.

[0065] (1) It can be understood that the first connecting pipe 221 and the second connecting pipe 222 are not limited to being integrally formed, and can also be two independent connecting pipes connected together or independently arranged respectively.

[0066] (2) In the above embodiment, a partition 214 is provided between the first ventilation chamber 211 and the second ventilation chamber 212, but this application is not limited thereto. The partition can be not provided or a part of the valve can be used as the partition.

[0067] (3) It can be understood that the sealing device 5 is not limited to being installed between the partition wall 13 and the rotor shaft 31. The shaft passing through the partition wall can be a shaft member of other forms or uses, and this shaft member can be, for example, a shaft member of a transmission.

[0068] It should be understood that at least some aspects or features of the above-described embodiments, examples, or illustrations can be appropriately combined.

[0069] It can be understood that in this application, when the number of components or members is not specifically limited, the number can be one or more, and here "more than one" means two or more. For the cases where the number of components or members shown in the drawings and / or described in the specification is a specific number such as two, three, four, etc., this specific number is usually exemplary rather than restrictive, and it can be understood as more than one, that is, two or more. However, this does not mean that this application excludes the case of one.

[0070] In this application, unless otherwise clearly stated or limited, terms such as "installed", "assembled", "connected", "linked", "joined", "abutted", "communicated", "interconnected", "conducted", "fixed", "fastened", etc. should be understood in a broad sense. For example, it can be direct or indirect. For example, regarding connection, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly stated or limited. For example, regarding communication / conductance, etc., it can be directly communicated / conducted or indirectly communicated / conducted via an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0071] In this application, unless otherwise clearly stated or limited, a member being disposed in / installed in / located in / accommodated in / placed within another member can be either of the following two situations: a part or most of this member is located within the other member; and this member is completely accommodated within the other member.

[0072] Although the above-described embodiments have been used to describe this application in detail, for those skilled in the art, this application is obviously not limited to the embodiments described in this specification. This application can be modified and implemented as a variant embodiment without departing from the gist and scope of this application determined by the claims. Therefore, the descriptions in this specification are for illustrative purposes and do not have any restrictive meaning for this application.

Claims

1. A ventilation device for an electric bridge drive system, characterized in that: The vent device comprises a vent plug, and the vent plug comprises: a first ventilation cavity; a second vent cavity; and a valve, the valve being disposed between the first ventilation cavity and the second ventilation cavity, the valve being capable of connecting or separating the first ventilation cavity and the second ventilation cavity, When the air pressure difference between the first ventilation cavity and the second ventilation cavity is less than a predetermined threshold, the valve remains closed to separate the first ventilation cavity from the second ventilation cavity. When the air pressure difference between the first ventilation cavity and the second ventilation cavity is greater than or equal to the predetermined threshold, the valve opens to allow the first ventilation cavity to communicate with the second ventilation cavity.

2. The ventilation device for an electric bridge drive system according to claim 1, characterized in that: The vent plug also includes a filter component, which includes a first filter component and a second filter component. The first filter component is arranged in the first vent cavity, so that the first vent cavity is connected to the outside atmosphere via the first filter component. The second filter component is arranged in the second vent cavity, so that the second vent cavity is connected to the outside atmosphere via the second filter component.

3. The ventilation device for an electric bridge drive system according to claim 2, characterized in that: The filter element is a filter membrane that allows gas to pass through in both directions and can block solids and liquids from passing through.

4. The ventilation device for an electric bridge drive system according to claim 1, characterized in that: The ventilation device also includes a connecting pipe, which is used to connect the vent plug to the housing of the electric bridge drive system. The connecting pipe includes a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are separated, the first connecting pipe is connected to the first ventilation cavity, and the second connecting pipe is connected to the second ventilation cavity.

5. The ventilation device for an electric bridge drive system according to claim 4, characterized in that: The first connecting pipe and the second connecting pipe are formed integrally.

6. A bridge drive system, characterized in that: A ventilation device comprising the ventilation device according to any one of claims 1 to 5.

7. The electric bridge drive system according to claim 6, characterized in that: The electric bridge drive system includes a housing, a motor and a transmission. The housing is formed with a first chamber for accommodating the motor and a second chamber for accommodating the transmission, the first chamber is communicated with the first ventilation chamber, and the second chamber is communicated with the second ventilation chamber.

8. The electric bridge drive system according to claim 7, characterized in that: The first chamber and the second chamber are separated by a partition wall, and the ventilator is arranged on the top of the shell, and the ventilator corresponds to the position of the partition wall inside the shell.

9. The electric bridge drive system according to claim 8, characterized in that: The electric bridge drive system further includes a shaft member disposed through the partition wall, and a sealing device is disposed between the shaft member and the partition wall.

10. The electric bridge driving system according to claim 6, characterized in that: The electric bridge drive system includes only one of the ventilation devices.

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