Liquid supplementing assembly, expansion water tank and vehicle

Abstract

The embodiment of the utility model provides a liquid supplementing assembly, an expansion water tank and a vehicle. The liquid supplementing assembly comprises a liquid leaking piece, a cover piece and a liquid guiding piece. The liquid leakage part is used for being connected with the box body, the liquid leakage part is provided with a through hole penetrating in the first direction, and the through hole is provided with a first opening and a second opening which are oppositely arranged in the first direction. The cover part is detachably connected with the liquid leakage part and used for covering the first opening. The liquid guide part is movably matched with the through hole in the length direction of the liquid leakage part, the liquid guide part limits a liquid guide channel, the liquid guide channel is provided with an opening, the liquid guide part has a folded state and an unfolded state in which the liquid guide part extends to the outer side of the liquid leakage part from the first opening, and when the liquid guide part is in the folded state, the liquid guide part can be contained in the through hole; when the liquid guide part is in the unfolded state, the opening is located on the outer side of the through hole, and the cross section of the liquid guide channel is gradually increased in the direction away from the second opening. The liquid supplementing device has the beneficial effect that the liquid supplementing operation convenience is improved.

Description

Technical Field

[0001] This application relates to the field of vehicle parts technology, and in particular to a fluid replenishment component, an expansion tank, and a vehicle. Background Technology

[0002] Some known expansion tanks are equipped with filling ports for adding coolant. However, in actual coolant replenishment, users often need to use a funnel to complete the operation, making the process rather cumbersome. Utility Model Content

[0003] This application provides a fluid replenishment component, an expansion tank, and a vehicle, aiming to improve the problem of the cumbersome fluid replenishment operation of known expansion tanks.

[0004] A fluid replenishment assembly includes a leaking component, a cover, and a fluid guiding component. The leaking component is used to connect to a housing and has a through hole extending along a first direction. The through hole has a first opening and a second opening disposed opposite to each other along the first direction. The cover is detachably connected to the leaking component and is used to cover the first opening. The fluid guiding component is movably connected to the leaking component along its length and defines a fluid guiding channel. The fluid guiding channel has an open opening. The fluid guiding component has a folded state and an unfolded state extending from the first opening to the outside of the leaking component. When the fluid guiding component is in the folded state, it can be received within the through hole. When the fluid guiding component is in the unfolded state, the open opening is located outside the through hole, and the cross-section of the fluid guiding channel gradually increases in the direction away from the second opening.

[0005] According to the coolant replenishment assembly of this application, when coolant needs to be replenished to the tank, the cover is opened from the draining part, the coolant guide is removed from the first opening and switched to the unfolded state, and then coolant is injected into the coolant guide through the open opening of the coolant guide channel. The coolant then flows into the tank through the second opening of the draining part, thereby improving the replenishment efficiency and ease of operation. The cross-sectional structure of the coolant guide channel guides the flow of coolant, further improving the ease of operation, reducing the risk of coolant spillage, and conserving coolant resources. After the replenishment operation is completed, the coolant guide is folded and inserted into the through hole, and then the cover is closed to seal the first opening, thus reliably housing the coolant guide within the draining part, saving space and facilitating future replenishment. Therefore, the coolant replenishment assembly of this application has a simple structure and is easy to operate, significantly improving the ease of operation and efficiency of replenishment.

[0006] In one possible implementation:

[0007] The fluid replenishment assembly also includes a transmission component. One end of the transmission component is movably connected to the fluid guiding component, and the other end of the transmission component is connected to the end of the fluid guiding component that has the open opening. The transmission component is used to drive the end of the fluid guiding component that has the open opening to move radially along the fluid guiding channel, so as to drive the fluid guiding component to fold circumferentially along the through hole and put the fluid guiding component into the folded state, or to drive the fluid guiding component to unfold circumferentially along the through hole and put the fluid guiding component into the unfolded state.

[0008] In this way, the transmission component can guide the liquid guiding component to move between the unfolded and folded states, thereby ensuring the reliability of the liquid guiding component's state switching and extending the service life of the liquid replenishment assembly.

[0009] In one possible implementation:

[0010] The cover includes a first bottom wall and a first surrounding wall. The first surrounding wall is connected to the edge of the first bottom wall and forms a limiting groove. The end of the transmission member facing away from the second opening can extend into the limiting groove. The first surrounding wall is used to limit the radial movement of the transmission member so that the liquid guiding member is kept in the folded state.

[0011] When the fluid replenishment assembly is not in operation, the cover prevents the transmission component from entering the through hole, ensuring the stability of the fluid guide component during storage. When the operator needs to perform fluid replenishment, the cover is first removed from the fluid replenishment assembly to open the first opening. The transmission component is no longer restricted. As the operator removes the fluid guide component and transmission component from the first opening, the transmission component can move the fluid guide component, thus switching it to the unfolded state. In this way, the cover simultaneously serves to seal the first opening and restrict the transmission component, improving the structural integration of the fluid replenishment assembly.

[0012] In one possible implementation:

[0013] The leakage component includes a second bottom wall and a second surrounding wall. The second surrounding wall is connected to the second bottom wall and forms the through hole. The end of the second surrounding wall opposite to the second bottom wall forms the first opening, and the second bottom wall has the second opening. The second bottom wall can facilitate the support of the liquid guiding component to prevent the liquid guiding component from falling into the tank through the second opening, thereby improving the reliability of the liquid replenishment assembly.

[0014] In one possible implementation:

[0015] The fluid replenishment assembly also includes a driving member disposed on the second bottom wall. The driving member is used to drive the fluid guiding member to move along a first direction and extend from the first opening to switch to the unfolded state.

[0016] Switching the liquid guide to the deployed state via a drive mechanism can improve the convenience of liquid replenishment operations.

[0017] In one possible implementation:

[0018] The second bottom wall also has a first drain hole, which is offset from the part of the second bottom wall that contacts the driving component.

[0019] The first drain hole allows coolant to be discharged into the housing. Simultaneously, the design of the first drain hole reduces the contact area between the coolant and the drive components, preventing coolant corrosion and damage to the drive components, thus balancing drainage efficiency with the reliability of the drive component's operation.

[0020] In one possible implementation:

[0021] The driving component includes an elastic element that elastically supports the second bottom wall between the liquid guiding component and the liquid guiding component. The elastic element is used to apply a spring force to the liquid guiding component to move towards the outside of the first opening of the through hole.

[0022] The elastic element has a simple and reliable structure, and can automatically drive the liquid guiding element to extend from the first opening after the cover is removed, thereby switching to the unfolded state, which reduces the number of operation steps for operators and improves the convenience of use.

[0023] In one possible implementation:

[0024] The leakage component further includes a first guide portion, which is connected to the edge of the second bottom wall near the second opening. The first guide portion extends toward the first opening in a first direction. The elastic element is sleeved on the first guide portion, and the first guide portion is used to guide the elastic element to deform in the first direction.

[0025] In this way, the elastic deformation direction of the elastic element can be guided, ensuring the stability of the deformation direction of the elastic element, reducing the possibility of the elastic element shifting or twisting during operation, and ensuring that the force applied by the elastic element to the liquid guide is approximately along the first direction, thereby improving the operational reliability of the liquid guide.

[0026] In one possible implementation:

[0027] The liquid guiding component includes a fixing part and an unfolding part. The fixing part is movably disposed within the through hole and has a first through hole. One end of the unfolding part is connected to the fixing part, and the other end of the unfolding part extends in a direction away from the fixing part. The unfolding part defines a second through hole, which communicates with the first through hole to form the liquid guiding channel. When the liquid guiding component is in the folded state, the cross-sectional area of ​​the second through hole is smaller than the cross-sectional area of ​​the through hole. When the liquid guiding component is in the unfolded state, the cross-sectional area of ​​the second through hole gradually increases in the direction away from the first through hole.

[0028] The fixing part improves the stability of the fluid guide component's movement through the through hole, thereby ensuring the reliability of the fluid guide component's switching between folded and unfolded states, thus reducing the maintenance frequency of the fluid replenishment assembly and extending its service life. The end of the unfolded part opposite to the fixing part can be unfolded or folded to adjust the shape of the second through hole, so that the second through hole of the fluid replenishment assembly in the unfolded state can guide the coolant.

[0029] In one possible implementation:

[0030] The inner surface of the leaking component near the first opening is provided with a first limiting portion; the liquid guiding component includes a second limiting portion and has a limiting position. At the limiting position, the projection of the first limiting portion along the first direction and the projection of the second limiting portion along the first direction are directly opposite each other to prevent the liquid guiding component from coming out of the liquid guiding channel from the first opening.

[0031] Thus, through the cooperation of the first and second limiting parts, the liquid guide can be prevented from slipping out of the through hole during its extension from the first opening, thereby improving the reliability of the liquid replenishment assembly. When the liquid replenishment assembly is in normal working condition, the liquid guide remains in the limiting position, thereby reducing the possibility of the liquid guide shaking during the liquid replenishment process and improving the liquid replenishment effect; and providing a positioning reference for the movement of the liquid replenishment component from the unfolded state to the folded state.

[0032] In one possible implementation:

[0033] The first limiting part has a first tooth on its surface facing the second opening, and the second limiting part has a second tooth on its surface facing the open opening. The second tooth engages with the first tooth to circumferentially limit the liquid guide to the leaking part within the through hole. The engagement of the first and second teeth ensures that the liquid guide is circumferentially limited within the through hole, thus maintaining it in the limited position and preventing it from detaching from the leaking part due to accidental operator handling, thereby improving the reliability of the replenishment assembly.

[0034] In one possible implementation:

[0035] Along the circumference of the through hole, a first clearance notch is provided on one side of the first limiting part, and a second clearance notch is provided on one side of the second limiting part; the extension length of the first clearance notch is greater than the extension length of the second limiting part, and the extension length of the second clearance notch is greater than the extension length of the first limiting part; the liquid guiding member also has a disengagement position, in which the first limiting part and the second clearance notch correspond to each other along a first direction, and the second limiting part and the first clearance notch correspond to each other along a first direction.

[0036] When the liquid replenishment component needs maintenance, first move the liquid guide in the folded state along the first direction until the first limiting part and the second limiting part cooperate. Then, control the folded liquid guide to move a certain distance along the first direction towards the second opening, and make the first limiting part and the second limiting part spaced apart along the first direction. After that, rotate the liquid guide so that the first limiting part and the second clearance notch correspond along the first direction, and the second limiting part and the first clearance notch correspond along the first direction. At this time, the first limiting part can pass through the second clearance notch, and the second limiting part can pass through the first clearance notch. The liquid guide is no longer limited along the first direction, and the liquid guide can be taken out from the first opening, thereby improving the maintenance convenience of the liquid guide and also making it easier for operators to maintain the box.

[0037] In one possible implementation:

[0038] The inner surface of the leaking component is provided with a second guide portion, which defines a guide groove. The guide groove extends along a first direction and is used to guide the first limiting portion to move along the first direction.

[0039] In this way, the accuracy of the movement direction of the first limiting part can be improved, thereby guiding the liquid guide to move along the first direction, preventing abnormal rotation or deviation of the liquid guide, and ensuring that the transmission part can drive the liquid guide to switch between the unfolded state and the folded state.

[0040] An expansion tank includes: a tank body defining a receiving cavity; the aforementioned replenishment assembly, wherein a leaking member of the replenishment assembly is connected to the tank body, and one end of the leaking member opposite to the cover extends into the receiving cavity, while the other end of the leaking member and the cover are located outside the receiving cavity.

[0041] A vehicle includes a frame and the aforementioned expansion tank. The expansion tank is disposed on the frame. Attached Figure Description

[0042] Figure 1 This is a three-dimensional structural diagram of a fluid replenishment component according to an embodiment of this application.

[0043] Figure 2This is a cross-sectional view of a fluid replenishment component according to an embodiment of this application, wherein the fluid guide is in a folded state and the cover limits the fluid guide.

[0044] Figure 3 This is a cross-sectional view of a fluid replenishment assembly according to an embodiment of this application, wherein the fluid guiding component is in an unfolded state.

[0045] Figure 4 This is a schematic diagram of the structure of an expansion tank according to an embodiment of this application.

[0046] Figure 5 This is an exploded structural diagram of a fluid replenishment assembly according to an embodiment of this application.

[0047] Figure 6 This is a cross-sectional view of a partial structure of a fluid replenishment component according to an embodiment of this application, wherein the first limiting portion and the second limiting portion abut against each other along a first direction.

[0048] Figure 7 This is a cross-sectional view of a partial structure of a fluid replenishment component according to an embodiment of this application, wherein the first limiting portion and the second limiting portion are spaced apart circumferentially.

[0049] Figure 8 This is a cross-sectional view of the fluid replenishment assembly according to an embodiment of this application during the assembly and disassembly process.

[0050] Figure 9 This is a cross-sectional view of a partial structure of a fluid replenishment component according to an embodiment of this application, wherein the first limiting portion and the second limiting portion are spaced apart along a first direction.

[0051] Figure 10 This is a schematic diagram of the structure of a vehicle according to an embodiment of this application.

[0052] Explanation of reference numerals in the attached figures:

[0053] 100. Liquid replenishment assembly; 10. Leakage component; 11. Second bottom wall; 12. Second side wall; 10a. First section; 10b. Second section; 13. First guide part; 131. Guide rod; 14. Second guide part; 141. Guide enclosure; 15. Internal thread part; 20. Cover; 21. First bottom wall; 22. First side wall; 23. External thread part; 30. Liquid guiding component; 31. Fixing part; 311. Lifting ring; 312. Connecting seat; 32. Expanding part; 33. Mounting part; 41. First limiting part; 42. Second limiting part; 43. First tooth; 431. First tooth; 44. Second tooth; 441. Second tooth; 50. Transmission component; 60, Drive component; 60a, Elastic component; 71, Fastening part; 72, Locking part; 200, Expansion tank; 201, Water tank; 2011, Top wall; 300, Vehicle; 301, Frame; X, First direction; W, Circumferential direction; K1, Through hole; K21, First opening; K22, Second opening; K3, Open opening; K4, First drain hole; K5, Second drain hole; K6, Guide hole; Q, Guide channel; Q1, First through hole; Q2, Second through hole; C1, First clearance notch; C2, Second clearance notch; C3, Mounting groove; C4, Limiting groove; C5, Draining groove; C6, Guide groove; P1, Limiting surface. Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial effects solved by this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0055] Known vehicles are equipped with thermal management systems that manage and regulate the temperature of components such as the battery and motor to improve vehicle performance, safety, and driving range. Thermal management systems typically include an expansion tank. The expansion tank balances coolant volume changes and stabilizes the internal pressure of the thermal management system to ensure proper coolant circulation, thereby ensuring the vehicle maintains optimal operating conditions under various operating circumstances.

[0056] Expansion tanks require coolant replenishment during use. Currently, adding coolant directly from the filler neck requires precise and complex operation, and coolant is prone to spillage, resulting in waste, potential corrosion of vehicle parts, and environmental pollution. Some users place a funnel at the filler neck and add coolant through it to complete the replenishment. However, in real-world scenarios, suitable funnels are not readily available. Therefore, current expansion tank replenishment procedures are rather cumbersome.

[0057] See Figure 1This application provides a fluid replenishment component 100. See also... Figures 2 to 4 The liquid replenishment assembly 100 includes a leaking component 10, a cover 20, and a liquid guiding component 30. The leaking component 10 is used to connect to the housing 201. The leaking component 10 has a through hole K1 extending along a first direction X, and the through hole K1 has a first opening K21 and a second opening K22 disposed opposite to each other along the first direction X. The cover 20 is detachably connected to the leaking component 10 and is used to cover the first opening K21. The liquid guiding component 30 is movably fitted into the through hole K1 along the length direction of the leaking component 10. The liquid guiding component 30 defines a liquid guiding channel Q, and the liquid guiding channel Q has an open opening K3. The liquid guiding component 30 has a folded state and an unfolded state extending from the first opening K21 to the outside of the leaking component 10. See also... Figure 2 When the liquid guiding component 30 is in the folded state, it can be accommodated within the through hole K1. (See also...) Figure 3 When the liquid guiding component 30 is in the unfolded state, the open opening K3 is located outside the through hole K1, and the cross-section of the liquid guiding channel Q gradually increases in the direction away from the second opening K22.

[0058] According to the liquid replenishment assembly 100 of this embodiment, when liquid needs to be replenished into the housing 201, the cover 20 and the draining part 10 are opened, the liquid guide 30 is taken out from the first opening K21 and switched to the unfolded state, and then the coolant is injected into the liquid guide 30 from the open opening K3 of the liquid guide channel Q. The coolant is injected into the housing 201 through the second opening K22 of the draining part 10, thereby improving the liquid replenishment efficiency and the convenience of the liquid replenishment operation. The cross-sectional structure of the liquid guide channel Q can guide the flow of coolant, thereby improving the convenience of the liquid replenishment operation, reducing the risk of coolant spillage, and saving coolant resources. After the liquid replenishment operation is completed, the liquid guide 30 is switched to the folded state and inserted into the through hole K1, and then the cover 20 is closed to close the first opening K21, thereby reliably housing the liquid guide 30 in the draining part 10, which saves space and facilitates the next liquid replenishment. Therefore, the liquid replenishment assembly 100 of this application has a simple structure and is easy to operate, which can greatly improve the convenience and efficiency of the liquid replenishment operation.

[0059] In addition, the structure of the fluid guide channel Q reduces the risk of coolant spillage, which can reduce the risk of corrosion to 300 vehicle parts and environmental pollution caused by coolant spillage.

[0060] In some embodiments, see Figure 2 The liquid guiding component 30 includes a fixing part 31 and an extending part 32. The fixing part 31 is movably disposed within the through hole K1. The fixing part 31 has a first through hole Q1. One end of the extending part 32 is connected to the fixing part 31, and the other end of the extending part 32 extends in a direction away from the fixing part 31. The extending part 32 defines a second through hole Q2. The second through hole Q2 communicates with the first through hole Q1 and forms a liquid guiding channel Q. See also Figure 2When the liquid guiding component 30 is in the folded state, the cross-sectional area of ​​the second through hole Q2 is smaller than the cross-sectional area of ​​the through hole K1. See also Figure 3 When the liquid guiding component 30 is in the unfolded state, the cross-section of the second through hole Q2 gradually increases in the direction away from the first through hole Q1.

[0061] The fixing part 31 can improve the stability of the fluid guiding component 30 in the movement of the through hole K1, thereby ensuring the reliability of the fluid guiding component 30 in switching between the folded and unfolded states, thus reducing the maintenance frequency of the fluid replenishment assembly 100 and extending the service life of the fluid replenishment assembly 100. The end of the unfolded part 32 opposite to the fixing part 31 can be unfolded or folded, thereby adjusting the shape of the second through hole Q2 so that the second through hole Q2 of the fluid replenishment assembly 100 in the unfolded state can guide the coolant.

[0062] Specifically, the unfolding part 32 is formed by an elongated, thin sheet structure. This sheet structure can be folded sequentially along the circumferential direction W of the first through hole Q1, allowing the unfolding part 32 to be housed within the through hole K1. This sheet structure can be a heat-resistant and waterproof tarpaulin, such as PVC-coated fabric. It has good high-temperature resistance and waterproof properties, and is not prone to chemical reactions with the coolant, thus allowing the fluid guiding component 30 to operate stably in the expansion tank environment and extending its service life. For example, when the unfolding part 32 is fully unfolded, it roughly forms a fan-shaped ring, ensuring that after the unfolding part 32 is connected to the fixing part 31, the cross-section of the second through hole Q2 can gradually increase in the direction away from the first through hole Q1. Simultaneously, the folding and unfolding method for housing the fluid guiding component 30 saves space and fully utilizes the space within the through hole K1, ensuring rapid unfolding and fluid guiding during replenishment.

[0063] In some embodiments, see Figure 2 and Figure 3 The fluid replenishment assembly 100 also includes a transmission member 50. One end of the transmission member 50 is movably connected to the fluid guide member 30. The other end of the transmission member 50 is connected to the end of the fluid guide member 30 with an opening K3. The transmission member 50 is used to drive the end of the fluid guide member 30 with the opening K3 to move radially along the fluid channel Q, so as to drive the fluid guide member 30 to fold along the circumferential W of the through hole K1 and put the fluid guide member 30 into a folded state; or to drive the fluid guide member 30 to unfold along the circumferential W of the through hole K1 and put the fluid guide member 30 into an unfolded state.

[0064] In this way, the transmission component 50 can guide the liquid guiding component 30 to move between the unfolded state and the folded state, thereby ensuring the reliability of the state switching of the liquid guiding component 30 and extending the service life of the liquid replenishment component 100.

[0065] Optionally, see Figure 3The number of transmission components 50 is multiple. Multiple transmission components 50 can be spaced apart on the liquid guiding member 30 along the circumferential direction W of the liquid guiding channel Q. For example, the number of transmission components 50 can be four. In other embodiments, the number of transmission components 50 can be one, two, three, or five or more.

[0066] Optionally, multiple transmission components 50 are distributed at equal intervals along the circumferential W of the liquid guiding channel Q, so that the liquid guiding component 30 can be deployed more uniformly and stably.

[0067] Optionally, the other end of the transmission component 50 can be detachably connected to the end of the fluid guide component 30 with an open opening K3, so as to facilitate the disassembly and maintenance of the fluid guide component 30. Specifically, the transmission component 50 and the fluid guide component 30 can be detachably connected through various methods such as fastening structure connection and snap-fit ​​connection.

[0068] Optionally, see Figure 3 The fluid replenishment assembly 100 also includes a fastening part 71 and a locking part 72. The fastening part 71 protrudes from the outer surface of one end of the open opening K3 of the fluid guide member 30. The fastening part 71 passes through the transmission member 50. The locking part 72 is located on the side of the transmission member 50 opposite to the fluid guide member 30, and the locking part 72 locks the fastening part 71 to the transmission member 50. In this way, a reliable connection between the transmission member 50 and the fluid replenishment member is achieved.

[0069] Specifically, the fastening part 71 and the locking part 72 can be connected by means of threaded connection, interference fit, etc. For example, the fastening part 71 can be a bolt, and the locking part 72 can be a nut.

[0070] Optionally, see Figure 3 The liquid guiding component 30 includes a mounting portion 33. The mounting portion 33 is located at the end of the liquid guiding component 30 opposite to the opening K3. One end of the transmission component 50 is rotatably connected to the mounting portion 33 via a pivot. The other end of the transmission component 50 is fixedly connected to the end of the liquid guiding component 30 where the opening K3 is located.

[0071] Specifically, see Figure 5 The mounting portion 33 protrudes from the outer peripheral surface of the fixing portion 31. The mounting portion 33 defines a mounting groove C3. One end of the transmission member 50 extends into the mounting groove C3 and is rotatably connected to the mounting portion 33 via a pivot.

[0072] In some embodiments, the fluid replenishment assembly 100 further includes an elastic portion (not shown in the figure). The elastic portion connects the transmission member 50 and the fixing portion 31, and the elastic portion is used to apply an elastic force to the transmission member 50 to rotate in a direction away from the fixing portion 31, so that the transmission member 50 drives the unfolding portion 32 to unfold.

[0073] In this way, the liquid guiding component 30 can automatically switch to the unfolded state after extending from the first opening K21, thereby improving the ease of use for operators.

[0074] Optionally, the elastic part can be constructed as a torsion spring. The torsion spring is sleeved on the pivot. The two torsion arms of the torsion spring are respectively connected to the mounting part 33 and the transmission member 50.

[0075] In other embodiments, there are multiple transmission members 50. Multiple transmission members 50 are spaced apart from each other along the circumferential direction W of the through hole K1. An elastic portion may also be provided at the end of the unfolding portion 32 opposite to the fixed portion 31, and between two adjacent transmission members 50, to realize radial movement of the transmission members 50 and drive the unfolding portion 32 to unfold.

[0076] Therefore, there are multiple ways to make the liquid guiding component 30 unfold after extending out of the first opening K21, and this embodiment does not specifically limit it.

[0077] In some embodiments, see Figure 3 The transmission member 50 and the first limiting part 41 are correspondingly arranged along the first direction X. The first limiting part 41 has a guide structure (not shown in the figure) on one side radially inward along the through hole K1. The transmission member 50 can abut against the guide structure during its movement along the first direction X. The guide structure is used to guide the transmission member 50 to extend out of the first opening K21. In this way, the movement reliability of the transmission member 50 can be improved.

[0078] Optionally, the guide structure can be constructed in various forms such as ball bearings, guide ramps, and guide grooves C6, and this embodiment does not impose any specific limitations on it.

[0079] In some embodiments, see Figure 2 and Figure 3 The cover 20 includes a first bottom wall 21 and a first surrounding wall 22. The first surrounding wall 22 connects to the edge of the first bottom wall 21 and forms a limiting groove C4. The end of the transmission member 50 facing away from the second opening K22 can extend into the limiting groove C4. The first surrounding wall 22 is used to limit the radial movement of the transmission member 50 so that the liquid guiding member 30 is kept in a folded state.

[0080] When the replenishment assembly 100 is in a non-operating state, the cover 20 can confine the transmission component 50 within the through hole K1, thereby ensuring the storage stability of the liquid guiding component 30. When the operator needs to perform a replenishment operation, the cover 20 is first removed from the replenishment assembly to open the first opening K21. The transmission component 50 is no longer confined. During the process of the operator removing the liquid guiding component 30 and the transmission component 50 from the first opening K21, the transmission component 50 can drive the liquid guiding component 30 to move, thereby switching to the unfolded state. In this way, the cover 20 simultaneously serves the functions of sealing the first opening K21 and confining the transmission component 50, improving the structural integration of the replenishment assembly 100.

[0081] In addition, during maintenance, the operator can use the cover 20 to keep the limiting transmission component 50 in place, thereby keeping the liquid guiding component 30 in a folded state and preventing the liquid guiding component 30 from unfolding during removal from the through hole K1, thus ensuring ease of maintenance.

[0082] Specifically, the inner surface of the limiting groove C4 forms a limiting surface P1. When the cover 20 closes the first opening K21, the transmission member 50 abuts against the limiting surface P1, thereby achieving the limiting effect of the cover 20 on the transmission member 50.

[0083] Specifically, the cover 20 can be detachably connected to the leakage part 10 through various means such as threaded connection, snap-fit ​​connection or fastening structure connection.

[0084] For example, see Figure 2 The cover 20 has an internal thread 15 on the inner side of the first enclosure 22. The outer surface of the leaking part 10 has an external thread 23. The internal thread 15 and the external thread 23 are threaded together to achieve a detachable connection between the cover 20 and the leaking part 10.

[0085] Specifically, see Figure 2 The leaking component 10 has a first section 10a and a second section 10b. The first section 10a is located on the outside of the housing 201, and the second section 10b extends into the inside of the housing 201. The first enclosure wall 22 of the cover 20 is threadedly connected to the first section 10a.

[0086] Optionally, when the liquid guiding component 30 is in a folded state, one end of the transmission component 50 extends out of the first opening K21 to facilitate a limiting engagement with the cover component 20.

[0087] In some embodiments, see Figure 2 and Figure 3 The leakage component 10 includes a second bottom wall 11 and a second surrounding wall 12. The second surrounding wall 12 is connected to the second bottom wall 11 and forms a through hole K1. The end of the second surrounding wall 12 opposite to the second bottom wall 11 forms a first opening K21, and the second bottom wall 11 has a second opening K22. The second bottom wall 11 can facilitate the support of the liquid guiding component 30 to prevent the liquid guiding component 30 from falling into the housing 201 through the second opening K22, thereby improving the reliability of the liquid replenishment component 100.

[0088] In some embodiments, see Figure 2 and Figure 3 The fluid replenishment assembly 100 also includes a drive member 60, which is disposed on the second bottom wall 11. The drive member 60 is used to drive the fluid guide member 30 to move along the first direction X and extend from the first opening K21 to switch to the deployed state. The use of the drive member 60 to switch the fluid guide member 30 to the deployed state can improve the convenience of fluid replenishment operation.

[0089] In some embodiments, see Figure 2 and Figure 3 The second bottom wall 11 also has a first drain hole K4, which is offset from the portion of the second bottom wall 11 that contacts the drive component 60. The first drain hole K4 can drain the coolant into the housing 201. At the same time, the position design of the first drain hole K4 can reduce the contact area between the coolant and the drive component 60, avoiding coolant corrosion and damage to the drive component 60, thus balancing drainage efficiency and the operational reliability of the drive component 60.

[0090] Specifically, there are multiple first drainage holes K4, which are divided into two drainage groups. Each drainage group includes multiple first drainage holes K4 that are sequentially spaced along the circumferential direction W of the through hole K1. The multiple first drainage holes K4 in each drainage group can be evenly spaced.

[0091] Optionally, see Figure 2 and Figure 3 A drain groove C5 is formed in the second bottom wall 11. A second drain hole K5 is formed on the bottom surface of the drain groove C5. The drain groove C5 is located radially outside the second opening K22. The drain groove C5 is used to guide the coolant out through the second drain hole K5. In this way, the drain groove C5 can guide the coolant out through the first drain hole K4, improving the coolant discharge efficiency.

[0092] Optionally, see Figure 2 and Figure 3 The drainage trough C5 is annular in shape. In other embodiments, the drainage trough C5 may also be constructed as an arc shape.

[0093] Optionally, the cross-sectional dimensions of the drain trough C5 gradually decrease towards the second opening K22. This improves the efficiency of the drain trough C5 in guiding the coolant.

[0094] For example, the cross-section of the drainage tank C5 can be constructed in various shapes such as trapezoidal and arc.

[0095] In some embodiments, see Figure 2 and Figure 3 The driving member 60 includes an elastic member 60a. The elastic member 60a elastically supports the second bottom wall 11 and the liquid guiding member 30, and the elastic member 60a is used to apply an elastic force to the liquid guiding member 30 to move outward toward the first opening K21 of the through hole K1.

[0096] The elastic element 60a has a simple and reliable structure, and can automatically drive the liquid guiding element 30 to extend from the first opening K21 after the cover 20 is removed, thereby switching to the unfolded state, thus reducing the number of operation steps for operators and improving ease of use.

[0097] Specifically, the spring can be a compression spring, a tension spring, or an elastic rod. In this embodiment, the spring is constructed as a compression spring and is disposed between the liquid guiding member 30 and the second bottom wall 11. Figure 2 In the embodiment shown, the spring is in a compressed state. Figure 3 In the embodiment shown, the spring is in a stretched state.

[0098] In other embodiments, the drive element 60 may also be configured as a waterproof motor or other drive component.

[0099] In some embodiments, see Figure 2 and Figure 3 The leakage component 10 also includes a first guide portion 14. The first guide portion 14 is connected to the edge of the second bottom wall 11 near the second opening K22, and extends along the first direction X toward the first opening K21. An elastic member 60a is sleeved on the first guide portion 14, and the first guide portion 14 is used to guide the elastic member 60a to deform along the first direction X.

[0100] In this way, the elastic deformation direction of the elastic element 60a can be guided, ensuring the stability of the deformation direction of the elastic element 60a, reducing the possibility of the elastic element 60a shifting or twisting during operation, and ensuring that the elastic element 60a applies force to the liquid guide 30 approximately along the first direction X, thereby improving the operational reliability of the liquid guide 30.

[0101] Optionally, the first guide portion 14 includes a guide wall 141 (with liquid guiding holes K6). One end of the guide wall 141 is connected to the second bottom wall 11. Multiple second drain holes K5 are formed at the connection between the guide wall 141 and the second bottom wall 11. The multiple second drain holes K5 are spaced apart along the circumference W of the guide wall 141. All of the multiple second drain holes K5 communicate with the second opening K22. Thus, the multiple second drain holes K5 can further optimize the drain path, ensuring that the coolant in the through hole K1 can flow smoothly into the housing 201, further reducing the possibility of coolant residue in the leaking component 10.

[0102] Specifically, a liquid guiding hole K6 is provided in the guide wall 141. The liquid guiding hole K6 is connected to the second opening K22. A portion of the coolant can be discharged directly from the second opening K22 into the housing 201 through the liquid guiding hole K6.

[0103] In some embodiments, see Figure 3 The inner surface of the leaking component 10 near the first opening K21 is provided with a first limiting portion 41. The liquid guiding component 30 includes a second limiting portion 42. The liquid guiding component 30 has a limiting position in which the projection of the first limiting portion 41 along the first direction X and the projection of the second limiting portion 42 along the first direction X are directly opposite each other, so as to prevent the liquid guiding component 30 from dislodging from the first opening K21 into the liquid guiding channel Q.

[0104] Thus, through the cooperation of the first limiting part 41 and the second limiting part 42, the liquid guiding member 30 can be prevented from dislodging from the through hole K1 during its extension from the first opening K21, thereby improving the reliability of the liquid replenishment assembly 100. When the liquid replenishment assembly 100 is in normal working condition, the liquid guiding member 30 is held in the limiting position, thereby reducing the possibility of the liquid guiding member 30 shaking during the liquid replenishment process and improving the liquid replenishment effect; and providing a positioning reference for the movement of the liquid replenishment member from the unfolded state to the folded state.

[0105] Optionally, the second limiting part 42 protrudes from the outer peripheral surface of the fixing part 31. In this way, it can be ensured that the second limiting part 42 is not prone to radial movement along the through hole K1, thus ensuring the reliability of the limiting fit between the second limiting part 42 and the first limiting part 41.

[0106] Optionally, see Figure 3 The fixing part 31 includes a lifting ring 311 and a connecting seat 312. The lifting ring 311 defines a first through hole Q1. The unfolding part 32 connects to the end face of the lifting ring 311. The connecting seat 312 connects to the end of the lifting ring 311 opposite to the unfolding part 32. The second limiting part 42 protrudes from the outer peripheral surface of the connecting seat 312. The connecting seat 312 and the lifting ring 311 can be connected by various methods such as fastening, threaded connection, snap-fit ​​connection, and interference fit. This embodiment does not specifically limit the connection methods.

[0107] Optionally, the cross-section of the first through hole Q1 gradually decreases towards the second opening K22. This facilitates the guidance of coolant flow toward the second opening K22 and its smooth injection into the inner side of the housing 201.

[0108] In some embodiments, see Figure 6 The first limiting part 41 has a first tooth 43 on the surface facing the second opening K22, and the second limiting part 42 has a second tooth 44 on the surface facing the open opening K3. The second tooth 44 is used to mesh with the first tooth 43 to limit the liquid guiding part 30 to the leakage part 10 in the circumferential direction of the through hole K1.

[0109] By engaging the first tooth 43 and the second tooth 44, the liquid guide 30 can be restricted along the circumferential direction W of the through hole K1, thereby ensuring that the liquid guide 30 remains in the restricted position and that the liquid guide 30 will not detach from the leaking part 10 due to accidental operation by the operator, thus improving the reliability of the liquid replenishment assembly 100.

[0110] Specifically, see Figure 6The first tooth portion 43 includes a plurality of first teeth 431. The plurality of first teeth 431 are spaced apart along the circumferential direction W of the through hole K1. The second tooth portion 44 includes a plurality of second teeth 441. The plurality of second teeth 441 are spaced apart along the circumferential direction W of the through hole K1. When the first tooth portion 43 and the second tooth portion 44 are engaged, the first teeth 431 are located between two adjacent second teeth 441.

[0111] In some embodiments, see Figure 6 Along the circumferential direction W of the through hole K1, a first clearance notch C1 is provided on one side of the first limiting part 41, and a second clearance notch C2 is provided on one side of the second limiting part 42. The extension length of the first clearance notch C1 is greater than the extension length of the second limiting part 42, and the extension length of the second clearance notch C2 is greater than the extension length of the first limiting part 41. (See also: [reference needed]) Figure 7 The liquid guiding component 30 also has a disengaged position. In the disengaged position, the first limiting part 41 corresponds to the second clearance notch C2 along the first direction X, and the second limiting part 42 corresponds to the first clearance notch C1 along the first direction X.

[0112] See also Figure 8 When the fluid replenishment assembly 100 needs maintenance, first move the folded fluid guide 30 along the first direction X until the first limiting part 41 engages with the second limiting part 42. Then, control the folded fluid guide 30 to move a certain distance along the first direction X towards the second opening K22, and keep the first limiting part 41 and the second limiting part 42 spaced apart along the first direction X. Afterwards, rotate the fluid guide 30, see... Figure 7 This allows the first limiting part 41 to correspond with the second clearance notch C2 along the first direction X, and the second limiting part 42 to correspond with the first clearance notch C1 along the first direction X. At this time, the first limiting part 41 can pass through the second clearance notch C2, and the second limiting part 42 can pass through the first clearance notch C1. The liquid guide 30 is no longer limited along the first direction X, and the liquid guide 30 can be taken out from the first opening K21, thereby improving the maintenance convenience of the liquid guide 30 and also making it easier for operators to maintain the housing 201.

[0113] Optionally, see Figure 7 There are multiple first limiting parts 41, which are distributed sequentially at intervals along the circumferential direction W of the through hole K1, and a first clearance gap C1 is defined between two adjacent first limiting parts 41. There are multiple second limiting parts 42, which are distributed sequentially at intervals along the circumferential direction W of the through hole K1, and a second clearance gap C2 is defined between two adjacent second limiting parts 42.

[0114] For example, the number of first limiting parts 41 is four. The number of second limiting parts 42 is four. In other embodiments, the number of first limiting parts 41 may be one, two, three, or more than four. The number of second limiting parts 42 may also be one, two, three, or more than four.

[0115] In some embodiments, see Figure 9 The inner surface of the leakage component 10 is provided with a second guide portion 13. The second guide portion 13 defines a guide groove C6, which extends along a first direction X. The guide groove C6 is used to guide the first limiting portion 41 to move along the first direction X.

[0116] In this way, the accuracy of the movement direction of the first limiting part 41 can be improved, thereby guiding the liquid guide 30 to move along the first direction X, so as to prevent the liquid guide 30 from rotating or deviating abnormally, and ensuring that the transmission part 50 can drive the liquid guide 30 to switch between the unfolded state and the folded state.

[0117] Specifically, there are multiple second guide sections 13. The number of second guide sections 13 is the same as the number of first limiting sections 41. Each second guide section 13 is fitted into the guide groove C6 of the corresponding second guide section 13.

[0118] Optionally, see Figure 9 The second guide section 13 includes two guide rods 131. Both guide rods 131 extend along the first direction X, and the two guide rods 131 are spaced apart along the circumferential direction W of the through hole K1, and a guide groove C6 is defined between the two guide rods 131.

[0119] The guide rod 131 has one end near the first opening K21 located on the side of the second limiting part 42 facing the second opening K22. When the liquid guiding component 30 is in the unfolded state, the fixing part 31 is located between the guide rod 131 and the first opening K21. This ensures that the liquid guiding component 30 is not interfered with by the second guide part 13 during disassembly, ensuring smooth disassembly of the liquid guiding component 30.

[0120] Work process:

[0121] The operation of the fluid replenishment component 100 according to an embodiment of this application is described below.

[0122] When the replenishment component 100 is not in operation, the cover 20 connects to the leakage component 10 and covers the first opening K21. The transmission component 50 is housed in the guide groove C6 and abuts against the lifting ring 311. The elastic component 60a is in a compressed state. Under the action of the elastic force of the elastic component 60a, the end of the transmission component 50 near the first opening K21 is limited by the limiting groove C4 of the cover 20, and the liquid guiding component 30 is kept in a folded state. The first limiting part 41 and the second limiting part 42 are arranged opposite each other along the first direction X.

[0123] After the detection module of vehicle 300 detects that the liquid level in expansion tank 200 is lower than the preset liquid level, the detection module sends a signal to the controller of vehicle 300, and the controller sends a signal to the alarm and triggers the alarm to remind the user to perform the liquid replenishment operation.

[0124] The user removes the cover 20, separating it from the liquid guide 30. The transmission component 50 is no longer restricted. The elastic force applied by the elastic component 60a to the connecting seat 312 is no longer restricted, causing the connecting seat 312 to move the lifting ring 311 closer to the first opening K21. The lifting ring 311 maintains its movement along the first direction X under the cooperation of the first limiting part 41 and the guide groove C6. During its movement, the lifting ring 311 also causes the liquid guide 30 to extend from the first opening K21 along the first direction X. After the first limiting part 41 abuts against the second limiting part 42, and multiple first teeth 431 and multiple second teeth 441 mesh with each other, the freedom of the connecting seat 312 is completely restricted, thus fixing the positions of the connecting seat 312 and the lifting ring 311. The position of the liquid guide 30 also remains fixed after it is fully extended. As the fluid guiding component 30 extends from the first opening K21, the elastic part pushes the end of the transmission component 50 near the open opening K3 to move radially outward, gradually increasing the distance between the multiple transmission components 50 and causing the unfolding part 32 to gradually unfold, so that the fluid guiding component 30 finally switches to the unfolded state. At this time, the lifting ring 311 and the end of the transmission component 50 near the connecting seat 312 are both received in the through hole K1, so that the elastic part finally drives the transmission component 50 to rotate to abut against the leakage component 10, after which the fluid guiding component 30 remains in the unfolded state. The user can then inject coolant through the open opening K3.

[0125] The coolant flows through the guide channel Q, the first through hole Q1, and the second through hole Q2 of the guide component 30 and then falls into the through hole K1. A portion of the coolant that falls into the through hole K1 directly enters the inside of the housing 201 through the second opening K22. The other portion of the coolant falls between the guide part and the second enclosure wall 12, and then flows into the inside of the housing 201 through the first drain hole K4 and the second drain hole K5.

[0126] After the user completes the fluid replenishment operation, the user can manually push the transmission component 50 until it is flush against the outer wall of the lifting ring 311, and switch the fluid guide component 30 to the folded state. Then, the cover 20 is placed on the end of the transmission component 50 near the open opening K3 to limit the transmission component 50 and keep the fluid guide component 30 in the folded state. Afterwards, the user pushes the cover 20 along the first direction X towards the second opening K22, causing the elastic component 60a to deform until the fluid guide component 30 is completely contained within the through hole K1. Then, the cover 20 is connected to the leakage component 10 to complete the fluid replenishment operation.

[0127] When the fluid replenishment assembly needs maintenance, the steps in the fluid replenishment process can be followed. During the operation, the cover 20 is controlled to keep the limiting transmission member 50 in place until the first limiting part 41 abuts against the second limiting part 42. After that, the cover 20 is pressed slightly along the first direction X towards the second opening K22, and the first limiting part 41 and the second limiting part 42 are separated. Then, the portion of the transmission member 50 exposed in the first opening K21 is rotated along the circumferential direction W of the through hole K1, thereby driving the lifting ring 311 and the connecting seat 312 to rotate until the first limiting part 41 corresponds to the second clearance notch C2 along the first direction X, and the second limiting part 42 corresponds to the first clearance notch C1 along the first direction X. At this time, the movement of the connecting seat 312 along the first direction X is no longer restricted, and the transmission member 50 can be pulled upward to remove the lifting ring 311, the connecting seat 312 and the elastic member 60a from the first opening K21, thereby facilitating maintenance of the parts of the fluid replenishment assembly or the inside of the housing 201. The process of reinstalling the fluid replenishment components can be performed by reversing the steps described above, and will not be repeated here.

[0128] See also Figure 4 This application also provides an expansion tank 200. The expansion tank 200 includes a tank body 201 and a replenishment assembly 100 as described in any of the foregoing embodiments. The tank body 201 defines a receiving cavity (not shown in the figure). A leaking part 10 of the replenishment assembly 100 is connected to the tank body 201, and one end of the leaking part 10 away from the cover 20 extends into the receiving cavity, while the other end of the leaking part 10 and the cover 20 are located outside the receiving cavity.

[0129] See also Figure 10 This application also provides a vehicle 300, including a frame 301 and an expansion tank 200 as described in the previous embodiment. The expansion tank 200 is disposed on the frame 301.

[0130] The expansion tank 200 and vehicle 300 of this application embodiment have the beneficial effects of the fluid replenishment component 100 of any of the foregoing embodiments since they include the fluid replenishment component 100 of any of the foregoing embodiments, and will not be described again here.

[0131] Furthermore, it should be noted that the fluid replenishment component 100 of the aforementioned embodiment can also be applied to other tank structures such as fuel tanks that require fluid replenishment operations. This embodiment does not specifically limit the specific application scenarios of the fluid replenishment component 100.

[0132] Terminology Explanation

[0133] In this application, "multiple" refers to two or more.

[0134] In this application, unless otherwise expressly defined, the terms "installation," "connection," and "linking" 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0135] The terms “first,” “second,” “third,” “fourth,” etc., in this application (if present) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0136] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0137] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A fluid replenishment component, characterized in that, include: A leaking component is used to connect to the housing. The leaking component has a through hole extending along a first direction. The through hole has a first opening and a second opening that are arranged opposite to each other along the first direction. A cover, which is detachably connected to the leaking component and is used to cover the first opening; A liquid guiding component is movably fitted into the through hole along the length direction of the leaking component. The liquid guiding component defines a liquid guiding channel with an open opening. The liquid guiding component has a folded state and an unfolded state extending from the first opening to the outside of the leaking component. When the liquid guiding component is in the folded state, it can be received within the through hole. When the liquid guiding component is in the unfolded state, the open opening is located outside the through hole, and the cross-section of the liquid guiding channel gradually increases in the direction away from the second opening.

2. The fluid replenishment assembly according to claim 1, characterized in that: The fluid replenishment assembly also includes a transmission component. One end of the transmission component is movably connected to the fluid guiding component, and the other end of the transmission component is connected to the end of the fluid guiding component that has the open opening. The transmission component is used to drive the end of the fluid guiding component that has the open opening to move radially along the fluid guiding channel, so as to drive the fluid guiding component to fold circumferentially along the through hole and put the fluid guiding component into the folded state, or to drive the fluid guiding component to unfold circumferentially along the through hole and put the fluid guiding component into the unfolded state.

3. The fluid replenishment component according to claim 2, characterized in that: The cover includes a first bottom wall and a first surrounding wall. The first surrounding wall is connected to the edge of the first bottom wall and forms a limiting groove. The end of the transmission member facing away from the second opening can extend into the limiting groove. The first surrounding wall is used to limit the radial movement of the transmission member so that the liquid guiding member is kept in the folded state.

4. The fluid replenishment component according to claim 1, characterized in that: The leakage component includes a second bottom wall and a second surrounding wall. The second surrounding wall is connected to the second bottom wall and forms the through hole. The end of the second surrounding wall opposite to the second bottom wall forms the first opening, and the second bottom wall has the second opening.

5. The fluid replenishment assembly according to claim 4, characterized in that: The fluid replenishment assembly also includes a driving member disposed on the second bottom wall. The driving member is used to drive the fluid guiding member to move along a first direction and extend from the first opening to switch to the unfolded state.

6. The fluid replenishment assembly according to claim 5, characterized in that: The second bottom wall also has a first drain hole, which is offset from the part of the second bottom wall that contacts the driving component.

7. The fluid replenishment assembly according to claim 5, characterized in that: The driving component includes an elastic element that elastically supports the second bottom wall between the liquid guiding component and the liquid guiding component. The elastic element is used to apply a spring force to the liquid guiding component to move towards the outside of the first opening of the through hole.

8. The fluid replenishment assembly according to claim 7, characterized in that: The leakage component further includes a first guide portion, which is connected to the edge of the second bottom wall near the second opening. The first guide portion extends toward the first opening in a first direction. The elastic element is sleeved on the first guide portion, and the first guide portion is used to guide the elastic element to deform in the first direction.

9. The fluid replenishment assembly according to claim 1, characterized in that: The liquid guiding component includes a fixed part and an extended part; the fixed part is movably disposed in the through hole, the fixed part has a first through hole, one end of the extended part is connected to the fixed part, the other end of the extended part extends in a direction away from the fixed part, the extended part defines a second through hole, the second through hole communicates with the first through hole, and forms the liquid guiding channel; When the liquid guiding component is in the folded state, the cross-sectional area of ​​the second through hole is smaller than the cross-sectional area of ​​the through hole. When the liquid guiding component is in the unfolded state, the cross-sectional area of ​​the second through hole gradually increases in the direction away from the first through hole.

10. The fluid replenishment assembly according to claim 1, characterized in that: The inner surface of the leaking component near the first opening is provided with a first limiting part; The liquid guiding component includes a second limiting portion and has a limiting position. In the limiting position, the projection of the first limiting portion along a first direction is directly opposite to the projection of the second limiting portion along the first direction, so as to prevent the liquid guiding component from dislodging from the liquid guiding channel through the first opening.

11. The fluid replenishment assembly according to claim 10, characterized in that: The first limiting part has a first tooth on the surface facing the second opening, and the second limiting part has a second tooth on the surface facing the open opening. The second tooth is used to mesh with the first tooth to limit the liquid guiding element to the leakage element in the circumferential direction of the through hole.

12. The fluid replenishment assembly according to claim 10, characterized in that: Along the circumference of the through hole, a first clearance notch is provided on one side of the first limiting part, and a second clearance notch is provided on one side of the second limiting part; The extension length of the first clearance notch is greater than the extension length of the second limiting part, and the extension length of the second clearance notch is greater than the extension length of the first limiting part. The liquid guiding component also has a disengaged position, in which the first limiting part and the second clearance notch correspond to each other along a first direction, and the second limiting part and the first clearance notch correspond to each other along a first direction.

13. The fluid replenishment assembly according to claim 10, characterized in that: The inner surface of the leaking component is provided with a second guide portion, which defines a guide groove. The guide groove extends along a first direction and is used to guide the first limiting portion to move along the first direction.

14. An expansion tank, characterized in that, include: The housing defines a receiving cavity; According to any one of claims 1 to 13, the liquid replenishment assembly has a leakage component connected to the housing, and one end of the leakage component facing away from the cover extends into the receiving cavity, while the other end of the leakage component and the cover are both located outside the receiving cavity.

15. A vehicle, characterized in that, include: Frame; The expansion tank as described in claim 14 is disposed on the vehicle frame.

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