Ventilation plug with alarm function and drive assembly

Abstract

The application provides a venting plug with an alarm function and a driving assembly. The venting plug with the alarm function comprises a main body part provided with a first flow channel; a venting part arranged at a first end of the main body part, the venting part being provided with a second flow channel in communication with the first flow channel; and a gas-permeable member arranged at the first end of the main body part, the gas-permeable member being located between the first flow channel and the second flow channel, and comprising a first component and a second component, the first component being overlapped with the second component. The venting plug with the alarm function can effectively exhaust air when the air pressure inside the driving assembly rises, and can effectively solve the problem that the driving assembly leaks oil due to the decrease of the venting amount or even the complete loss of the gas permeability of the gas-permeable member after the excessive use of the gas-permeable member, thereby reducing the repair loss of the user. When the gas permeability of the gas-permeable member is lost, the first component and the second component are separated to form a narrow gap, airflow passes through the gap to emit a whistle sound, thereby prompting the user to replace the venting plug, and the venting plug has a warning function.

Description

Technical Field

[0001] This application relates to the field of vehicle manufacturing technology, and in particular to a vent plug with an alarm function and a drive assembly. Background Technology

[0002] With the rapid development of electric vehicles, electric drives and hybrid transmissions are increasingly adopting oil-cooled motors to enhance motor cooling and improve continuous output. Because these motors contain high-voltage electrical components, they require high levels of waterproofing. Traditional water-cooled motors use waterproof and breathable membrane vents. These membranes have strong waterproofing capabilities, effectively ensuring the motor's waterproofing requirements. The interior of a water-cooled motor is oil-free; the breathable membrane allows air to pass through but prevents water from passing through.

[0003] After the motor adopts oil cooling, there is cooling oil inside the motor. During the operation of the motor, the cooling oil will produce oil vapor. The oil vapor will be carried by the air inside the motor to the vent plug. At the same time, the oil vapor will turn into tiny oil droplets when it encounters cold air during the flow. Because the waterproof and breathable membrane has weak oil resistance, the pore structure of the breathable membrane can be blocked by tiny oil droplets, resulting in a loss of ventilation. This will lead to a loss of ventilation between the inside of the drive assembly and the outside, causing abnormal rise in air pressure or excessive negative pressure inside the assembly, and ultimately causing oil leakage from the drive assembly. In addition, the existing vent plug does not have an alarm or indication function, so users cannot replace the vent plug in a timely manner.

[0004] Therefore, a vent plug with an alarm function needs to be designed to solve the above problems. Summary of the Invention

[0005] In view of this, in order to overcome the shortcomings of the prior art, the present invention provides a vent plug and drive assembly with alarm function, which effectively solves the problems of oil leakage in other sealing parts of the drive assembly due to increased internal air pressure and the lack of alarm or reminder functions of existing vent plugs, making it impossible for users to replace the vent plug in a timely manner.

[0006] According to a first aspect of the present invention, a vent plug with an alarm function is provided, wherein the vent plug with the alarm function includes a main body portion having a first flow channel; a vent portion disposed at a first end of the main body portion having a second flow channel communicating with the first flow channel; and a venting member disposed at the first end of the main body portion, the venting member being located between the first flow channel and the second flow channel, the venting member including a first component and a second component, the first component overlapping the second component.

[0007] Preferably, the overlapping portion of the first component and the second component is bonded together.

[0008] Preferably, the main body includes an installation end and a connecting end disposed in a first direction. The installation end has a first through hole, and the connecting end has a second through hole communicating with the first through hole. The first through hole and the second through hole constitute the first flow channel.

[0009] Preferably, the outer peripheral side of the mounting end is formed with a first limiting portion and a second limiting portion that are spaced apart in the first direction and extend along a second direction perpendicular to the first direction; the vent is covered by the end of the main body and is located between the first limiting portion and the second limiting portion.

[0010] Preferably, the venting part includes a housing, an abutment member, and a resetting member. The housing has an accommodating space inside, and the first end of the main body is disposed in the accommodating space. The two ends of the abutment member abut against the venting member and the resetting member respectively in a first direction.

[0011] Preferably, the abutment member has a third through hole in the middle and a first through groove in the outer periphery of the abutment member, and the third through hole, the accommodating space and the first through groove constitute the second flow channel.

[0012] Preferably, the inner circumferential side of the vent is provided with a limiting boss, and the outer circumferential side of the main body is provided with a first limiting groove that cooperates with the limiting boss.

[0013] Preferably, the abutting member is a valve plate, and the outer peripheral side of the valve plate is provided with a second limiting groove that cooperates with the limiting boss.

[0014] Preferably, the abutting member includes an extension end extending toward the main body, the inner peripheral side of the extension end abutting the outer peripheral side of the main body.

[0015] Preferably, the extended end is provided with a drainage end face, which is flush with the upper surface of the ventilated element.

[0016] Preferably, a second through groove is provided on the outer periphery of the second limiting portion, and the second through groove communicates with the second flow channel; a gap is formed between the end of the vent covering the main body and the outer periphery of the main body.

[0017] According to a second aspect of the invention, a drive assembly is provided, wherein the drive assembly includes a vent plug with an alarm function as described above.

[0018] The vent plug with alarm function according to the present invention, through the cooperation of the main body, the venting component and the venting part, realizes effective exhaust when the internal air pressure of the drive assembly increases. It can effectively solve the problem of oil leakage in the drive assembly caused by the decrease in air volume or even complete loss of air permeability after the venting component is overused. It also avoids oil leakage in other sealing parts of the drive assembly, reducing the user's repair losses. At the same time, the venting component has a first component and a second component that overlap each other. After the venting component loses its air permeability, the first component and the second component separate to form a narrow gap. The airflow passes directly through the gap and can emit a whistle to remind the user to replace the vent plug, thus having an early warning function.

[0019] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of a vent plug with alarm function according to an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of another structure of a vent plug with an alarm function according to an embodiment of the present invention is shown;

[0023] Figure 3 A schematic diagram of the main body portion according to an embodiment of the present invention is shown;

[0024] Figure 4 A schematic diagram of the structure of the breathable component according to an embodiment of the present invention is shown;

[0025] Figure 5 A schematic diagram of the structure of the abutment member according to an embodiment of the present invention is shown;

[0026] Figure 6 A schematic diagram of the housing structure according to an embodiment of the present invention is shown;

[0027] Figure 7 A schematic diagram of the ventilation path of a vent plug with an alarm function according to an embodiment of the present invention is shown.

[0028] Figure 8 A schematic diagram of a vent plug with alarm function according to an embodiment of the present invention in its normal operating state is shown.

[0029] Figure 9 A schematic diagram of a vent plug with alarm function in an alarm state according to an embodiment of the present invention is shown;

[0030] Figure 10 A schematic diagram of a drive assembly with an alarm function installed according to an embodiment of the present invention is shown.

[0031] Reference numerals: 1-Main body; 101-Mounting end; 102-Connecting end; 103-First through hole; 104-Second through hole; 105-First limiting part; 106-Second limiting part; 107-First limiting groove; 108-Second through groove; 2-Ventilation part; 201-Housing shell; 202-Abutting part; 203-Reset part; 204-Third through hole; 205-First through groove; 206-Limiting boss; 207-Second limiting groove; 208-Drainage end face; 209-Conical end; 3-Ventilating part; 301-First component; 302-Second component; 4-Drive assembly; S1-First direction; S2-Second direction. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0035] In the description of the embodiments of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0036] According to a first aspect of the present invention, a vent plug with an alarm function is provided, such as Figures 1 to 9 As shown, this vent plug with alarm function is applied to oil-cooled electric drive assemblies or hybrid transmission assemblies, and is generally installed on the upper part of the housing of the oil-cooled electric drive assembly or hybrid transmission assembly. This vent plug with alarm function can ensure stable air pressure inside the oil-cooled electric drive assembly or hybrid transmission assembly under normal operating conditions, thus preventing oil leakage. It can also remind the user to replace the vent plug that has lost its venting capacity when an alarm is triggered. This vent plug with alarm function includes a main body 1, a venting part 2, and a venting element 3.

[0037] In the following description, reference will be made to Figures 1 to 9 The detailed structure of the main body 1, the ventilation part 2, and the venting element 3 of the vent plug with alarm function is described in detail.

[0038] like Figure 2 As shown, in this embodiment, for ease of description, two directions are defined here, namely the first direction S1 and the second direction S2, specifically in... Figure 2 The first direction S1 and the second direction S2 are perpendicular to each other. Since the vent plug with alarm function can be formed into an approximately cylindrical structure, the first direction S1 can be understood as the axial direction of the cylindrical structure, and the second direction S2 can be understood as the radial direction of the cylindrical structure.

[0039] like Figure 1 and Figure 2 As shown, in an embodiment, the vent plug with alarm function may include a main body 1 with a first flow channel, a vent 2 covering the first end of the main body 1, and a breathable member 3 disposed between the two.

[0040] Specifically, the main body 1 serves as the main structure of the vent plug with alarm function, and the vent plug with alarm function can be installed in the drive assembly 4 described below (for example, refer to...). Figure 10 The main body 1 has a first flow channel inside, which is connected to the drive assembly 4. The air pressure inside the drive assembly 4 can be connected to the outside through the first flow channel to achieve air pressure regulation.

[0041] Ventilation section 2 is disposed at the first end of main body section 1. Main body section 1 can be formed into an approximately cylindrical structure. The approximately cylindrical main body section 1 can have two ends, namely a second end connected to drive assembly 4 and a first end connected to ventilation section 2. Ventilation section 2 has a second flow channel communicating with the first flow channel. The air pressure inside drive assembly 4 communicates with the outside through the first and second flow channels, thereby achieving pressure balance.

[0042] The vent 3 is disposed at the end of the first end of the main body 1, and the vent 3 is located between the first flow channel and the second flow channel, which can prevent oil and gas inside the drive assembly 4 from entering the second flow channel along with the air. Figure 4 As shown, the breathable component 3 may include a first component 301 and a second component 302, with the first component 301 overlapping the second component 302. Partial ends of the first component 301 and partial ends of the second component 302 overlap each other, as shown... Figure 8 As shown, under normal operating conditions, gas passes directly through the vent 3, such as... Figure 9 As shown, in the alarm state, the overlapping parts of the first component 301 and the second component 302 separate under the action of external force, creating a narrow and relatively irregularly shaped channel. When gas passes through, it will generate turbulent airflow, which in turn will produce an alarm sound.

[0043] Preferably, in the embodiment, the connection method of the first component 301 and the second component 302 can be, for example, adhesive bonding. The overlapping part of the first component 301 and the second component 302 is fixed by adhesive bonding. Adhesive bonding can achieve fixation, but the connection force is not too strong, and it can be separated under the action of a certain external force. In this way, the switching from normal working state to alarm state is realized.

[0044] Preferably, in the embodiment, the breathable component 3 has waterproof and breathable capabilities. The breathable component 3 can be formed into a disc-like structure and includes a first component 301 and a second component 302 formed into a semicircle. The two semicircular components are bonded together with a connecting adhesive to form a complete circular breathable membrane. In addition, the two semicircular components can be separated under a certain tensile force.

[0045] Preferably, the breathable component 3 can be a waterproof and breathable membrane, which can be, for example, PTFE (expanded polytetrafluoroethylene).

[0046] like Figure 7 As shown in the embodiment, the flow channel of the vent plug with alarm function is as indicated by the arrow in the figure. Gas from inside the drive assembly 4 can be discharged through the first flow channel of the main body 1, the vent 3, and the second flow channel of the vent 2.

[0047] Preferably, in this embodiment, the vent plug with alarm function has air pressure balance adjustment capability. For example... Figure 7 As shown, under normal circumstances, the gas inside the drive assembly 4 expands due to heat and passes through the vent plug with alarm function, ensuring that the internal air pressure of the drive assembly 4 matches the external atmospheric pressure. When the drive assembly 4 cools down or transitions from an operating state to a non-operating state, the internal temperature and air pressure of the drive assembly 4 decrease, and the air will... Figure 7 The path shown is the opposite of the path that enters the interior of the drive assembly 4, ensuring that the internal air pressure of the drive assembly 4 is consistent with the external atmospheric pressure, thereby achieving pressure balance regulation.

[0048] Specifically, such as Figure 8 and Figure 9 As shown, in this embodiment, the vent plug with alarm function has two states, one of which is as follows: Figure 8 As shown in the normal operating state, the vent plug with alarm function is in normal operating condition. When the gas inside the drive assembly 4 expands due to heat, it passes through the vent plug with alarm function, ensuring that the internal air pressure of the drive assembly 4 matches the external atmospheric pressure; another is as follows... Figure 9 The alarm state shown indicates that after the vent plug with alarm function has been used in the vehicle or drive system for a long time, the vent holes of the vent 3 are blocked by oil droplets, and the vent 3 loses its ventilation capacity. When the drive assembly 4 enters the working state from the non-working state, the air pressure inside the drive assembly 4 increases, and the air pressure on the side of the vent 3 closest to the drive assembly 4 increases. Figure 9 The air pressure on the lower side is higher than on the other side. Figure 9 On the upper side of the vent, a pressure difference is generated, which forces the first component 301 and the second component 302, which are bonded together, to separate. The complete circular state of the vent 3 becomes two separate semicircles. At the same time, these two semicircles can only be separated by a very small gap due to the assembly structure described below. In this case, the gas inside the drive assembly 4 will be quickly discharged through this narrow gap. The gas will be disturbed when passing through the narrow gap, which will generate a whistle. This whistle can be used to remind the user to replace the vent plug (because the waterproof ability decreases after the vent 3 is separated, continued use will increase the risk of water entering the drive assembly 4). In this way, the alarm function is realized.

[0049] Preferably, such as Figure 2and Figure 3 As shown, in this embodiment, the main body 1 may include a mounting end 101 and a connecting end 102 disposed in the first direction S1. The mounting end 101 is used to connect with the drive assembly 4 (e.g., see reference 4). Figure 10 (Installation and assembly, the connecting end 102 is used to connect the ventilation section 2.)

[0050] Specifically, the mounting end 101 has a first through hole 103, which communicates with the interior of the drive assembly 4. The connecting end 102 has a second through hole 104 that communicates with the first through hole 103. The first through hole 103 and the second through hole 104 constitute the first flow channel mentioned above, which is used to allow gas inside the drive assembly 4 to pass through.

[0051] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, a first limiting portion 105 extending outward along the second direction S2 and forming an annular shape is formed on the outer peripheral side of the mounting end 101. When the vent plug with alarm function is installed in the drive assembly 4, the first limiting portion 105 abuts against the side of the mounting portion of the drive assembly 4, thus limiting the vent plug with alarm function during assembly. A second limiting portion 106 extending outward along the second direction S2 is formed on the outer peripheral side of the connecting end 102, and the second limiting portion 106 is disposed inside the vent portion 2. Here, the outer peripheral side can be understood as the outer side wall.

[0052] The ventilation section 2 can be covered at the first end of the main body section 1. The end of the ventilation section 2 on the side of the main body section 1 is located between the first limiting portion 105 and the second limiting portion 106, that is, the end of the ventilation section 2 extends beyond the second limiting portion 106. In this way, the ventilation section 2 is limited to the second limiting portion 106 by the tapered end 209, thereby restricting the movement of the ventilation section 2 in the first direction S1 and preventing the ventilation section 2 from detaching from the main body section 1.

[0053] Preferably, such as Figure 2 and Figure 3 As shown, in the embodiment, the first limiting portion 105 and the second limiting portion 106 can both be formed as flange structures.

[0054] Preferably, such as Figure 2 and Figure 3 As shown, in this embodiment, a first limiting groove 107 may be provided on the outer periphery of the second limiting portion 106. The first limiting groove 107 can cooperate with the limiting protrusion 206 provided on the inner periphery of the venting portion 2, thereby restricting the rotational movement of the venting portion 2 relative to the main body portion 1. Here, the inner periphery can be understood as the inner sidewall.

[0055] Preferably, such as Figure 2 and Figure 3As shown, in this embodiment, there can be multiple first limiting grooves 107. For example, multiple first limiting grooves 107 can be evenly arranged on the outer periphery of the second limiting portion 106. In this embodiment, there can be two first limiting grooves 107, which are arranged opposite to each other.

[0056] Preferably, such as Figure 2 As shown, in this embodiment, a second through groove 108 is also provided on the outer periphery of the second limiting portion 106, and the second through groove 108 connects to the second flow channel. In this way, gas is discharged through the first flow channel, the second flow channel, and the second through groove 108, and the second through groove 108 can facilitate the smoother passage of gas and water.

[0057] Preferably, such as Figure 2 , Figure 5 and Figure 6 As shown, in the embodiment, the ventilation part 2 may include a housing 201, an abutment 202 and a reset member 203. The abutment 202 and the reset member 203 are disposed inside the housing 201 in the first direction S1, and the abutment 202 abuts against the first end of the main body part 1.

[0058] Specifically, the housing 201 has an accommodating space inside, and the first end of the main body 1, the abutment 202 and the reset member 203 are all disposed in the accommodating space.

[0059] Preferably, such as Figure 6 As shown, the housing 201 can be formed as a cap-like structure, with the aforementioned accommodating space inside the cap-like structure for the passage of gas and to provide necessary space for the connection of other components. The end of the cap-like structure on the main body 1 side in the first direction S1 is formed as a tapered end 209, which tapers towards the centerline of the cap-like structure, thereby allowing the housing 201 to achieve a limiting engagement with the second limiting portion 106 through the tapered end 209. Furthermore, it should be noted that the housing 201 can be made of stamped steel sheet. During assembly, the end of the cap-like structure on the main body 1 side in the first direction S1 does not form a tapered end 209. After the housing 201 is placed over the main body 1, the end of the cap-like structure on the main body 1 side in the first direction S1 is stamped to form the tapered end 209, thus achieving limiting and assembly.

[0060] Preferably, the limiting fit between the tapered end 209 and the second limiting portion 106 can be understood as follows: (e.g.) Figure 2 As shown, in the embodiment, when the housing 201 is installed on the main body 1, the tapered end 209 does not abut against the outer peripheral side of the connecting end 102 of the main body 1, and a gap is formed between the two (that is, a gap is formed between the end of the vent 2 covering the main body 1 and the outer peripheral side of the main body 1), and the gap is used for the passage of gas.

[0061] Preferably, such as Figure 2 As shown, in this embodiment, the two ends of the abutment member 202 abut against the ventilator member 3 and the reset member 203 respectively in the first direction S1. The reset member 203 can press the abutment member 202 and then press the ventilator member 3 in the first direction S1 to achieve the limiting and fixing of the ventilator member 3.

[0062] Preferably, such as Figure 2 and Figure 5 As shown, in this embodiment, a third through hole 204 is provided in the middle of the abutment member 202, and a first through groove 205 is provided on the outer periphery of the abutment member 202. The third through hole 204, the accommodating space, and the first through groove 205 constitute the second flow channel. The gas inside the drive assembly 4 first passes through the first flow channel formed by the first through hole 103 and the second through hole 104, then passes through the vent member 3, and then is discharged through the second flow channel formed by the third through hole 204, the accommodating space, and the first through groove 205.

[0063] Preferably, such as Figure 6 As shown, in this embodiment, a limiting boss 206 is provided on the inner circumferential side of the housing 201. The limiting boss 206 can be formed as an elongated structure extending along the first direction S1. The limiting boss 206 can cooperate with the first limiting groove 107 and the second limiting groove 207 described below to limit the rotation of the venting part 2 relative to the main body part 1.

[0064] Preferably, such as Figure 5 As shown, in this embodiment, the abutment member 202 can be a valve plate, and the outer periphery of the valve plate is provided with a second limiting groove 207 that cooperates with the limiting boss 206. Preferably, there can be multiple second limiting grooves 207, and the multiple second limiting grooves 207 are evenly arranged on the outer periphery of the valve plate.

[0065] Preferably, such as Figure 2 and Figure 5 As shown, in this embodiment, the abutment member 202 can be formed as a stepped structure. Specifically, the abutment member 202 may include an extension end extending toward the main body portion 1, the inner circumferential side of which abuts against the outer circumferential side of the main body portion 1. The first end and the second limiting portion 106 of the main body portion 1 can be formed as stepped structures, and the stepped structure formed by the abutment member 202 corresponds to the stepped structure formed by the first end of the main body portion 1, which facilitates assembly and also facilitates the setting of the drainage end face 208 described below.

[0066] Preferably, such as Figure 5As shown, in this embodiment, a drainage end face 208 is provided at the bottom of the extension end. Since the abutment member 202 is formed into a stepped structure, when the abutment member 202 is provided at the end of the connection end 102, the drainage end face 208 is flush with the upper surface of the vent member 3. In this way, when external water enters the upper part of the vent member 3 through the second flow channel, the water will be discharged from the first through groove 205 opened by the valve plate, and there will be no residue.

[0067] Preferably, such as Figure 2 As shown, in this embodiment, the reset member 203 can be a spring.

[0068] The assembly process of the vent plug with alarm function is as follows: the vent 3 is simultaneously glued to the connecting end 102 and the abutment 202. The connecting end 102 and the abutment 202 are coaxially installed and can slide relative to each other through a circumferential clearance fit. The abutment 202 also serves as the mounting base for the reset component 203, and the abutment 202 and the reset component 203 are coaxially installed. The reset component 203 is installed in the accommodating space of the housing 201, and the housing 201 is coaxially installed with the main body 1, the vent 3, the abutment 202, and the reset component 203. The reset component 203 and the abutment 202 have a clearance fit and can slide relative to each other. The lower diameter of the housing 201 is reduced to ensure that the housing 201 will not detach from the main body 1 even under the action of the reset component 203. The reset component 203 is in a compressed state when the vent plug is assembled, ensuring that the main body 1, the vent 3, and the abutment 202 are in a compressed state.

[0069] The vent plug with alarm function is used in normal operating condition as follows: (e.g.) Figure 7 As shown and combined Figures 2 to 6 Under normal circumstances, when the gas inside the drive assembly 4 expands due to heat, it passes through the first through hole 103 and the second through hole 104 of the main body 1, through the vent 3, and enters the housing 201. It then passes through the third through hole 204 of the abutment 202, the accommodating space of the housing 201, the first through groove 205 of the abutment 202, and the second through groove 108 of the main body 1, thus entering the atmosphere. This ensures that the internal air pressure of the drive assembly 4 matches the external atmospheric pressure. When the drive assembly 4 cools down or transitions from an operating state to a non-operating state, the internal temperature of the drive assembly 4 decreases, the air pressure drops, and the air will... Figure 7 The air enters the drive assembly 4 through the opposite path, thereby making the internal air pressure of the drive assembly 4 the same as the external atmospheric pressure.

[0070] The operation of the vent plug with alarm function in alarm state is as follows: After prolonged use in the vehicle or drive system, the vent hole of the vent element 3 in the vent plug becomes clogged with oil droplets, resulting in the loss of venting capacity. When the drive assembly 4 transitions from a non-operating state to an operating state, the internal air pressure of the drive assembly 4 increases, and the air pressure on the side of the vent element 3 closest to the drive assembly 4 increases. The air pressure on one side of the vent element 3 is greater than that on the other side, creating a pressure difference. When the pressure difference acting on the vent element 3 exceeds the spring force of the reset element 203 (spring) in the assembled state, venting is activated. Part 3 pushes the abutment 202 away from the drive assembly 4. After the abutment 202 moves, the first component 301 and the second component 302 of the vent 3 separate, and the vent 3 changes from a bonded whole circular piece to two separate semicircles. At the same time, due to the limiting effect of the housing 201 on the abutment 202, the first component 301 and the second component 302 can only separate with a very small gap. In this state, the gas inside the drive assembly 4 will be quickly discharged through the narrow gap between the first component 301 and the second component 302, reducing the internal air pressure of the drive assembly 4 until it matches the external air pressure. When the gas passes through the narrow gap between the semicircular first component 301 and the semicircular second component 302, a disturbance will occur, generating a whistle. This whistle is used to remind the user that the vent plug needs to be replaced (because the waterproof ability decreases after the vent 3 is separated, the risk of water ingress into the drive assembly 4 increases with continued use, so it needs to be replaced in time), thus realizing the alarm function.

[0071] This vent plug with alarm function, through the cooperation of the main body, venting component, and venting section, effectively vents when the internal air pressure of the drive assembly increases. It can effectively solve the problem of oil leakage in the drive assembly caused by the decrease in air volume or even complete loss of air permeability after excessive use of the venting component. It also avoids oil leakage in other sealing parts of the drive assembly, reducing the user's repair losses. At the same time, the venting component has an interlocking first and second component. When the venting component loses its air permeability, the first and second components separate, forming a narrow gap. Airflow passes directly through the gap and emits a whistle to remind the user to replace the vent plug, thus providing an early warning function.

[0072] In addition, such as Figure 10 As shown, according to a second aspect of the present invention, a drive assembly 4 is provided, the drive assembly 4 including a vent plug with an alarm function as described above. The vent plug with the alarm function is installed on the top of the housing of the drive assembly 4. By installing the vent plug with the alarm function, the internal air pressure of the drive assembly 4 can be kept stable under normal working conditions, preventing oil leakage from the drive assembly 4. In the alarm state, it can remind the user to replace the vent plug that has lost its ventilation capacity.

[0073] Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A breather plug with alarm function, characterized in that, The vent plug with an alarm function comprises: a main body part provided with a first flow channel; a vent part covered on a first end of the main body part, the vent part being provided with a second flow channel communicated with the first flow channel; a gas permeable member arranged on the first end of the main body part, the gas permeable member being located between the first flow channel and the second flow channel, the gas permeable member comprising a semicircular first member and a semicircular second member, the first member being overlapped on the second member to form a complete circular gas permeable film; the main body part comprising a mounting end arranged in a first direction and a connecting end, the mounting end being used for mounting and assembling with a driving assembly, the connecting end being used for connecting the vent part; a first limiting part is formed on the outer periphery of the mounting end and extends in a second direction perpendicular to the first direction, a second limiting part is formed on the outer periphery of the mounting end and extends in the second direction perpendicular to the first direction, and the end of the vent part covered on the main body part is located between the first limiting part and the second limiting part; the vent part comprising a housing, an abutting member and a reset member, an accommodation space is formed in the interior of the housing, the first end of the main body part, the abutting member and the reset member are arranged in the accommodation space, and the two ends of the abutting member in the first direction respectively abut against the gas permeable member and the reset member; a limiting boss is arranged on the inner periphery of the housing, and a first limiting groove matched with the limiting boss is arranged on the outer periphery of the second limiting part; the abutting member is a valve plate, a second limiting groove matched with the limiting boss is arranged on the outer periphery of the valve plate, a second through groove is arranged on the outer periphery of the second limiting part, the second through groove communicates with the second flow channel, and a gap is formed between the end of the vent part covered on the main body part and the outer periphery of the main body part; after the vent plug with an alarm function is used in a vehicle or a driving system for a long time, the vent holes of the gas permeable member in the vent plug are blocked by oil drops, the venting capacity of the gas permeable member is lost, when the driving assembly is switched from a non-working state to a working state, the internal air pressure of the driving assembly is increased, the air pressure on the side of the gas permeable member close to the driving assembly is increased, the air pressure on one side of the gas permeable member is greater than that on the other side, a pressure difference is generated, when the pressure generated by the pressure difference acting on the gas permeable member is greater than the spring force of the reset member in the assembled state, the gas permeable member pushes the abutting member to move away from the driving assembly, after the abutting member moves, the first member and the second member of the gas permeable member are separated by a narrow gap, the gas in the driving assembly is rapidly discharged through the narrow gap between the first member and the second member, and the gas generates a whistle sound when passing through the narrow gap between the first member and the second member, so as to realize the alarm function.

2. The breather plug with alarm function according to claim 1, characterized in that, The overlapped part of the first member and the second member is bonded.

3. The breather plug with alarm function according to claim 1, characterized in that, The mounting end is provided with a first through hole, the connecting end is provided with a second through hole communicated with the first through hole, and the first through hole and the second through hole constitute the first flow channel.

4. The breather plug with alarm function according to claim 1, characterized in that, The abutment member has a third through hole in the middle and a first through groove on the outer periphery of the abutment member. The third through hole, the accommodating space and the first through groove constitute the second flow channel.

5. The breather plug with alarm function according to claim 4, characterized in that, The abutting member includes an extension end extending toward the main body, the inner peripheral side of the extension end abutting the outer peripheral side of the main body.

6. The breather plug with alarm function according to claim 5, characterized in that, The extended end is provided with a drainage end face, which is flush with the upper surface of the ventilated component.

7. A drive assembly characterized by, The drive assembly includes a vent plug with an alarm function as described in any one of claims 1 to 6.

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