Three-way connector, engine wire harness assembly, engine system and vehicle
By designing the opening and closing mechanism of the three-way joint and using a buoyancy valve and cover plate to control the water discharge port, the problem of water accumulation in the engine wiring harness is solved, preventing rainwater from entering the electrical components, and improving the waterproof performance of the engine system.
Patent Information
- Application Number
- CN202420945579.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-01-17
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing engine wiring harnesses are prone to water accumulation on rainy days, resulting in damage to electrical components.
A three-way joint is designed, including a housing, a cavity and an opening and closing mechanism. There is a water accumulation cavity and a water discharge port in the cavity. The opening and closing mechanism controls the opening state of the water discharge port through a buoyant valve and a cover plate to ensure that the rainwater is discharged after it is collected. Prevent water accumulation from entering electrical components.
It effectively prevents damage to electrical components caused by rainwater accumulation and improves the waterproof performance of the engine system in rainy days.
Smart Images
Figure CN222365794U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of engines, in particular to a three-way connector, an engine wiring harness component, an engine system and a vehicle. Background Art
[0002] The engine wiring harness is an important part of the engine system, which is used to connect the electronic control unit (ECU) and various electrical components in the engine system. The engine wiring harness in the prior art is usually installed in a corrugated tube, and the corrugated tubes are connected by connectors.
[0003] However, if it rains, rainwater can easily enter the cavity of the bellows through the gap between the connector and the bellows. If too much rainwater accumulates in the cavity of the bellows, the accumulated rainwater will eventually flow into the electrical components, easily causing damage to the electrical components.
[0004] Therefore, how to prevent the damage of electrical components caused by the accumulation of rainwater in the bellows has become a technical problem that needs to be solved urgently in this field. Utility Model Content
[0005] The purpose of the utility model is to at least solve the problem of how to prevent the damage of electrical components caused by the accumulation of rainwater in the bellows. This purpose is achieved through the following technical solutions:
[0006] In the first aspect, the utility model proposes a three-way joint for connecting a wiring harness bellows of an engine, the three-way joint comprising: a shell; a cavity located inside the shell, the cavity comprising a first cavity, a second cavity and a water accumulation cavity which are interconnected, the first cavity and the second cavity are both used to connect to the wiring harness bellows, the water accumulation cavity has a drain port which is connected to the outside of the water accumulation cavity, the drain port having an open state and a closed state; and an opening and closing mechanism for controlling the drain port to switch between an open state and a closed state.
[0007] This three-way joint can be assembled to the bottom of the engine wiring harness assembly along the direction of gravity. In this way, when it rains, rainwater enters the interior of the wiring harness bellows through the gap between the connector and the wiring harness bellows, and eventually the rainwater gathers in the water accumulation chamber. When too much rainwater accumulates in the water accumulation chamber, the drain port can be switched to an open state through the opening and closing mechanism to allow the accumulated rainwater to flow out of the drain port to the outside of the three-way joint, thereby preventing the rainwater inside the three-way joint from continuing to flow in the wiring harness bellows due to excessive accumulation, thereby avoiding the occurrence of damage to electrical components caused by rainwater flowing into the electrical components.
[0008] In some embodiments of the present invention, the three-way joint has a first posture. When the three-way joint is in the first posture, along the direction of gravity, the water outlet is located at the lowermost end of the water accumulation chamber.
[0009] In some embodiments of the utility model, the opening and closing mechanism includes a buoyancy valve, which is located inside the water accumulation chamber. The buoyancy valve is used to block the water outlet from inside the water accumulation chamber.
[0010] In some embodiments of the present invention, the buoyancy valve is a spherical valve body.
[0011] In some embodiments of the utility model, the opening and closing mechanism also includes: a cover plate, located outside the water accumulation chamber, used to block the drain port from the outside of the water accumulation chamber; and a connecting rod, passed through the drain port, and the cover plate is fixedly connected to the buoyancy valve through the connecting rod; the three-way joint also has a second posture. When the three-way joint is in the second posture, along the weight direction, the drain port is located at the uppermost end of the water accumulation chamber, and the cover plate blocks the drain port from the outside of the water accumulation chamber.
[0012] In some embodiments of the utility model, the opening and closing mechanism further includes a limit plate, which is installed in the water accumulation chamber, and is used to limit the distance that the buoyancy valve moves in a direction away from the drain port.
[0013] In some embodiments of the utility model, the buoyancy valve is an elastic valve body. When the three-way joint is in the second posture, the cover plate blocks the drain outlet from the outside of the water accumulation chamber; along the direction of gravity, the lower end of the buoyancy valve abuts against the limit plate, and the upper end of the buoyancy valve abuts against the cover plate, and the buoyancy valve is in a compressed state.
[0014] In the second aspect, the utility model proposes an engine wiring harness assembly, which includes: a plurality of wiring harness bellows, the wiring harness bellows including a bellows and a wiring harness arranged inside the bellows; a plurality of connectors, the connectors being used to connect two adjacent wiring harness bellows; and any one of the above-mentioned three-way joints, wherein the three-way joint is located at the bottom end of the engine wiring harness assembly along the direction of gravity, and the outer wall of the three-way joint is provided with a connector for fixedly connecting to the body of the engine.
[0015] In a third aspect, the utility model provides an engine system, which includes an engine body and the above-mentioned engine wiring harness assembly.
[0016] In a fourth aspect, the utility model provides a vehicle, which includes the above-mentioned engine system.
[0017] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:
[0019] Figure 1 A schematic diagram of the structure of the three-way joint provided in an embodiment of the utility model when it is in a first posture and the drain port is in a closed state;
[0020] Figure 2 A schematic diagram of the structure of the three-way joint provided in an embodiment of the utility model when it is in a first posture and the drain port is in an open state;
[0021] Figure 3 A schematic diagram of the structure of the three-way connector provided by the embodiment of the utility model in a second posture;
[0022] Figure 4 A schematic diagram of the structure of the connection between the engine wiring harness assembly and the ECU provided in an embodiment of the utility model.
[0023] The reference numerals are as follows:
[0024] 10. Tee connector;
[0025] 1. Shell;
[0026] 2. Cavity; 21. First cavity; 22. Second cavity; 23. Water accumulation cavity; 23a. Water accumulation; 231. Drainage port;
[0027] 3. Opening and closing mechanism; 31. Float valve; 32. Cover plate; 33. Connecting rod; 34. Limit plate;
[0028] 20. Wire harness corrugated tube;
[0029] 30. Connectors;
[0030] 40. Cable ties;
[0031] 50.ECU. DETAILED DESCRIPTION
[0032] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0033] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.
[0034] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.
[0035] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.
[0036] Figure 1 A schematic diagram of the structure of the three-way joint provided in an embodiment of the utility model when it is in a first posture and the drain port is in a closed state; Figure 2 A schematic diagram of the structure of the three-way joint provided in the embodiment of the utility model when it is in a first posture and the drain port is in an open state; Figure 1 and Figure 2 As shown, an embodiment of the utility model provides a three-way connector 10 for connecting a wiring harness bellows 20 of an engine, the three-way connector 10 comprises: a shell 1; a cavity 2, located inside the shell 1, the cavity 2 comprises a first cavity 21, a second cavity 22 and a water accumulation cavity 23 which are interconnected, the first cavity 21 and the second cavity 22 are both used to connect with the wiring harness bellows 20, the water accumulation cavity 23 has a drain port 231, the drain port 231 is connected to the outside of the water accumulation cavity 23, the drain port 231 has an open state and a closed state; and an opening and closing mechanism 3, used to control the drain port 231 to switch between an open state and a closed state.
[0037] In order to facilitate understanding of the positional relationship and function of each cavity in the three-way connector 10, Figure 1 and Figure 2 The connection relationship between the first cavity 21 and the second cavity 22 and the wiring harness corrugated tube 20 is schematically shown.
[0038] In this embodiment, the three-way connector 10 can be assembled to the bottom of the engine wiring harness assembly along the direction of gravity; in this way, when it rains, rainwater enters the interior of the wiring harness corrugated tube 20 through the gap between the connector and the wiring harness corrugated tube 20, and eventually the rainwater gathers in the water accumulation chamber 23. When too much rainwater accumulates in the water accumulation chamber 23, the drain port 231 can be switched to the open state through the opening and closing mechanism 3 to allow the accumulated rainwater to flow out from the drain port 231 to the outside of the three-way connector 10.
[0039] Therefore, the three-way joint 10 can prevent excessive rainwater from accumulating inside the three-way joint 10 and continuing to flow in the harness corrugated tube 20 , thereby avoiding the occurrence of the phenomenon that the electrical components are damaged due to rainwater flowing into the electrical components.
[0040] refer to Figure 1 and Figure 2 According to an optional embodiment of the present application, the three-way joint 10 has a first posture. When the three-way joint 10 is in the first posture, along the direction of gravity, the drain port 231 is located at the lowermost end of the water accumulation chamber 23.
[0041] In this embodiment, since the purpose of setting the drain port 231 is to discharge the rainwater accumulated in the water storage chamber 23 to the outside of the three-way joint 10, setting the drain port 231 at the lowermost end of the three-way joint 10 along the gravity direction can improve the drainage efficiency.
[0042] Continue to refer Figure 1 and Figure 2According to an optional embodiment of the present application, the opening and closing mechanism 3 includes a buoyancy valve 31, which is located inside the water accumulation chamber 23. The buoyancy valve 31 is used to block the drain port 231 from inside the water accumulation chamber 23. Specifically, the buoyancy valve 31 can be a spherical valve body, and the outer surface of the spherical structure can make the drain port 231 more tightly blocked.
[0043] In this embodiment, Figure 1 and Figure 2 As shown, when the three-way joint 10 is in the first posture, the amount of water accumulated in the water accumulation chamber 23 has a set standard; when the amount of water accumulated in the water accumulation chamber 23 reaches the set standard, the buoyancy valve 31 floats to the drain port 231 under the buoyancy and is in an open state; when the amount of water accumulated in the water accumulation chamber 23 does not reach the set standard, the buoyancy valve 31 blocks the drain port 231 from the inside of the water accumulation chamber 23, and the drain port 231 remains in a closed state.
[0044] Among them, the setting standard of the water accumulation amount is: when the three-way joint 10 is in the first posture and the water accumulation amount in the water accumulation chamber 23 reaches the set standard, the buoyancy generated by the accumulated water on the buoyancy valve 31 can make the buoyancy valve 31 float upward until the buoyancy valve 31 no longer blocks the drain port 231, and the drain port 231 is in an open state.
[0045] It should be noted that the weight and volume of the buoyancy valve 31 can be determined based on specific tests, as long as the accumulated water in the water accumulation chamber 23 flows into the wiring harness bellows 20 connected to the electrical components and can be discharged from the drain port 231. It depends on the actual working conditions and is not limited.
[0046] In this embodiment, it is easy to understand that when the accumulated water in the water accumulation chamber 23 reaches a certain amount, the buoyancy generated by the accumulated water on the buoyancy valve 31 can overcome the gravity of the buoyancy valve 31 itself, and the buoyancy valve 31 floats upward, thereby switching the drain port 231 to an open state.
[0047] Specifically, the state switching of the water outlet 231 in this embodiment is described below in conjunction with the accompanying drawings:
[0048] When rainwater does not enter the water storage chamber 23, the state of the three-way joint 10 is as follows: Figure 1 As shown, the buoyancy valve 31 blocks the drain port 231 of the three-way connector 10, and the drain port 231 is in a closed state;
[0049] When rainwater gradually flows from the first cavity 21 into the water accumulation cavity 23, it is understandable that if the drain port 231 is always kept closed, the accumulated water 23a in the water accumulation cavity 23 will gradually flow into the second cavity 22, and then the accumulated water will flow into the wiring harness bellows 20 connected to the second cavity 22, so there is a risk that the accumulated water 23a will eventually flow to the electrical components connected to the wiring harness bellows 20, thereby causing damage to the electrical components.
[0050] Therefore, when the amount of water in the water chamber 23 reaches the set standard, the buoyancy of the water 23a exerted on the buoyancy valve 31 overcomes its own gravity and floats upward until the buoyancy valve 31 no longer blocks the drain port 231, and the drain port 231 is in an open state. Figure 2 shown.
[0051] Therefore, the setting of the buoyancy valve 31 can automatically switch the drain port 231 to an open state through the buoyancy of the accumulated water on the buoyancy valve 31 without manual operation, which simply and effectively prevents the electrical components from being damaged due to excessive water accumulation in the water accumulation chamber 23.
[0052] Figure 3 The schematic diagram of the structure of the three-way connector provided by the embodiment of the utility model in the second posture is shown in FIG. Figure 3 According to an optional embodiment of the present application, the opening and closing mechanism 3 also includes: a cover plate 32, located outside the water accumulation chamber 23, used to block the drain port 231 from the outside of the water accumulation chamber 23; and a connecting rod 33, which is passed through the drain port 231, and the cover plate 32 is fixedly connected to the buoyancy valve 31 through the connecting rod 33; the three-way joint 10 also has a second posture. When the three-way joint 10 is in the second posture, along the weight direction, the drain port 231 is located at the uppermost end of the water accumulation chamber 23, and the cover plate 32 blocks the drain port 231 from the outside of the water accumulation chamber 23.
[0053] In this embodiment, since the vehicle's driving conditions are changeable, when encountering poor road conditions or other unexpected events, the vehicle will be bumped or vibrated, and the position of the engine wiring harness assembly will change with a certain probability. If the position of the three-way connector 10 is changed to the second posture (that is, flipped up and down 180° from the first posture), the buoyancy valve 31 cannot block the drain port 231.
[0054] Therefore, the opening and closing mechanism 3 of the present embodiment is also provided with a cover plate 32 and a connecting rod 33. When the three-way joint 10 is in the second posture, the opening and closing mechanism 3 will move downward under the action of its own gravity to achieve the blocking of the drain port 231 from the outside of the three-way joint 10 through the cover plate 32, thereby preventing rainwater from directly entering the wiring harness corrugated tube 20 through the drain port 231.
[0055] refer to Figure 1 According to an optional embodiment of the present application, the opening and closing mechanism 3 also includes a limit plate 34, which is installed in the water accumulation chamber 23. When the three-way joint 10 is in the first posture, the limit plate 34 is located on the side of the buoyancy valve 31 away from the drain port 231. The limit plate 34 is used to limit the distance that the buoyancy valve 31 moves away from the drain port 231 to prevent the cover plate 32 from blocking the drain port 231 from the outside of the water accumulation chamber 23.
[0056] In this embodiment, when the opening and closing mechanism 3 includes the cover plate 32 and the connecting rod 33, and the three-way joint 10 is in the first posture, if the amount of water in the water accumulation chamber 23 reaches the set standard, the buoyancy valve 31 will float upward due to the buoyancy of the water accumulation to overcome its own gravity. If the floating distance of the buoyancy valve 31 is too large, there is a risk of driving the connecting rod 33 to block the drain port 231 from the outside of the three-way joint 10.
[0057] Therefore, the present embodiment is provided with a limit plate 34 for limiting the upward movement distance of the buoyancy valve 31, thereby effectively preventing the cover plate 32 from blocking the drain port 231 from the outside of the water accumulation chamber 23, and ensuring that the accumulated water in the water accumulation chamber 23 can flow out from the drain port 231 to the outside of the three-way joint 10 after the amount of accumulated water in the water accumulation chamber 23 reaches the set standard.
[0058] refer to Figure 3 According to an optional embodiment of the present application, the buoyancy valve 31 is an elastic valve body. When the three-way joint 10 is in the second posture, the cover plate 32 blocks the drain port 231 from the outside of the water accumulation chamber 23; along the direction of gravity, the lower end of the buoyancy valve 31 abuts against the limit plate 34, and the upper end of the buoyancy valve 31 abuts against the cover plate 32, and the buoyancy valve 31 is in a compressed state.
[0059] In this embodiment, when the opening and closing mechanism 3 includes a limit plate 34, if the three-way joint 10 is in the second posture, due to the setting of the limit plate 34, the opening and closing mechanism 3 is at risk of not being able to fall to the cover plate 32 to block the drain port 231 from the outside of the three-way joint 10. Therefore, in this embodiment, the material of the buoyancy valve 31 is selected to be an elastic material. When the three-way joint 10 is in the second posture, the opening and closing mechanism 3 will fall under the action of its own gravity until the lower end of the buoyancy valve 31 abuts against the limit plate 34. Since the material of the buoyancy valve 31 is an elastic material, the buoyancy valve 31 will continue to fall under the action of the gravity of the cover plate 32 and the connecting rod 33, so that the buoyancy valve 31 is in a compressed state until the cover plate 32 blocks the drain port 231 from the outside of the water accumulation chamber 23.
[0060] Therefore, the arrangement of this embodiment can ensure that when the three-way connector 10 is in the second posture, the cover plate 32 can block the drain port 231 from the outside of the water accumulation chamber 23, thereby more effectively preventing rainwater from directly entering the wiring harness corrugated tube 20 from the drain port 231.
[0061] Figure 4 The schematic diagram of the structure of the engine wiring harness assembly connected to the ECU provided by the embodiment of the utility model is shown in FIG. Figures 1 to 4The embodiment of the utility model also provides an engine wiring harness assembly, which includes: a plurality of wiring harness corrugated tubes 20, the wiring harness corrugated tubes 20 including a corrugated tube and a wiring harness arranged inside the corrugated tube; a plurality of connectors 30, the connectors 30 are used to connect two adjacent wiring harness corrugated tubes 20; and any one of the above-mentioned three-way joints 10, along the direction of gravity, the three-way joint 10 is located at the bottom end of the engine wiring harness assembly, and the outer wall of the three-way joint 10 is provided with a connector for fixedly connecting to the body of the engine.
[0062] In this embodiment, the electrical component directly connected to the three-way connector 10 is taken as an example of ECU50. When the engine harness assembly is assembled, the three-way connector 10 is set at the lowest point of the engine harness assembly in the first posture in the gravity direction, and the position of the three-way connector 10 is lower than ECU50. In this way, before the accumulated water in the harness corrugated tube 20 enters the ECU50, it will be discharged from the drain port 231 of the three-way connector 10, thereby preventing the ECU50 from being damaged by rainwater. The specific principle of the way in which the accumulated water is discharged from the drain port 231 can refer to the above analysis of the three-way connector 10, which will not be repeated here.
[0063] In addition, the connection piece is provided to ensure that the newly assembled three-way joint 10 can be stably in the first posture; taking the connection piece as a cable tie 40 as an example, if the cable tie 40 becomes loose or broken during the operation of the vehicle, the posture of the three-way joint 10 cannot be guaranteed, and it may switch from the first posture to the second posture. At this time, the cover plate 32 is used to block the drain port 231 of the water accumulation chamber 23 from the outside of the three-way joint 10. Similarly, the specific principle can be referred to the above analysis of the three-way joint 10, which will not be repeated here.
[0064] Therefore, the engine wiring harness assembly can effectively prevent the electrical components connected to the wiring harness corrugated tube 20 from being damaged by rain.
[0065] The embodiment of the utility model further provides an engine system, which includes an engine body and the above-mentioned engine wiring harness assembly.
[0066] In this embodiment, the beneficial effects of the engine system are the same as the beneficial effects of the above-mentioned engine wiring harness assembly, which will not be repeated here.
[0067] An embodiment of the utility model further provides a vehicle, which includes the above-mentioned engine system.
[0068] In this embodiment, the beneficial effects of the vehicle are the same as the beneficial effects of the above-mentioned engine system, which will not be repeated here.
[0069] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.
Claims
1. A three-way connector for connecting a wiring harness corrugated pipe of an engine, characterized in that: include: case; a cavity, located inside the shell, the cavity comprising a first cavity, a second cavity and a water accumulation cavity which are interconnected, the first cavity and the second cavity are both used to be connected to the wiring harness corrugated tube, the water accumulation cavity has a water discharge port, the water discharge port is connected to the outside of the water accumulation cavity, and the water discharge port has an open state and a closed state; and The opening and closing mechanism is used to control the water outlet to switch between the open state and the closed state.
2. The three-way connector according to claim 1, characterized in that: The three-way joint has a first posture. When the three-way joint is in the first posture, along the direction of gravity, the water outlet is located at the lowermost end of the water accumulation chamber.
3. The three-way connector according to claim 2, characterized in that: The opening and closing mechanism comprises a buoyancy valve, and the buoyancy valve is located inside the water accumulation chamber, and the buoyancy valve is used to block the water outlet from inside the water accumulation chamber.
4. The three-way connector according to claim 3, characterized in that: The buoyancy valve is a spherical valve body.
5. The three-way connector according to claim 3, characterized in that: The opening and closing mechanism also includes: a cover plate, located outside the water accumulation chamber, and used to block the water outlet from outside the water accumulation chamber; and A connecting rod is passed through the drain port, and the cover plate is fixedly connected to the buoyancy valve via the connecting rod; The three-way joint also has a second posture. When the three-way joint is in the second posture, along the direction of gravity, the drain port is located at the uppermost end of the water accumulation cavity, and the cover plate blocks the drain port from the outside of the water accumulation cavity.
6. The three-way connector according to claim 5, characterized in that: The opening and closing mechanism further comprises a limit plate, which is installed in the water accumulation chamber and is used to limit the distance that the buoyancy valve moves in a direction away from the water outlet.
7. The three-way connector according to claim 6, characterized in that: The buoyancy valve is an elastic valve body. When the three-way joint is in the second posture, the cover plate blocks the drain port from the outside of the water accumulation chamber. Along the direction of gravity, the lower end of the buoyancy valve abuts against the limit plate, and the upper end of the buoyancy valve abuts against the cover plate, and the buoyancy valve is in a compressed state.
8. An engine wiring harness assembly, characterized in that: include: A plurality of wire harness corrugated tubes, each of which comprises a corrugated tube and a wire harness arranged inside the corrugated tube; A plurality of connectors, wherein the connectors are used to connect two adjacent wiring harness corrugated tubes; as well as The three-way connector as described in any one of claims 1 to 7 is located at the bottom of the engine wiring harness assembly along the direction of gravity, and the outer wall of the three-way connector is provided with a connector for fixedly connecting to the body of the engine.
9. An engine system, characterized in that: The invention comprises a body and the engine wiring harness assembly as claimed in claim 8.
10. A vehicle, characterized in that: Comprising the engine system of claim 9.