Cap structure of a reservoir

Abstract

A cap structure for a liquid reservoir includes a cap body, a connecting port, a first limiting member, a second limiting member, and a third limiting member. The first limiting member is disposed on the top of the cap body; the second limiting member is disposed on the side wall of the connecting port; the second limiting member is disposed on the top surface of the cap body; and the third limiting member is disposed on the top surface of the cap body. Both the first and second limiting members are connected to the third limiting member. The third limiting member is used to abut against the end face of the connecting joint, so that the first and second screw-in portions are respectively aligned with the space near the cap body of the first limiting member and the space near the cap body of the second limiting member. This application achieves a stable connection with the connecting joint by providing the first and second limiting members on the side wall of the connecting port and the surface of the cap body, avoiding problems such as wall thickness reduction and easy breakage caused by slotting in the cap body, and also preventing the first and second screw-in portions from scratching the cap body, thus ensuring the structural strength and sealing performance of the cap body.

Description

Technical Field

[0001] This utility model belongs to the technical field of spray painting equipment, and in particular relates to a cover structure for a liquid reservoir. Background Technology

[0002] As one of the core components of a spray painting system, the reservoir's main function is to hold the liquid paint to be sprayed and, through its connection with the spray gun, ensure a stable supply of paint. In practical applications, reservoirs are typically designed to be detachable, allowing for quick replacement and cleaning when paint runs out or when changing paint types, thereby improving the flexibility and efficiency of the spraying operation.

[0003] To achieve a detachable connection between the reservoir and the nozzle connector, existing technology proposes a structural design with a specific-shaped limiting groove on the outer surface of the reservoir cover. These limiting grooves are adapted to the limiting components on the connector. By screwing the limiting component into the limiting groove, the limiting component is engaged with one end of the limiting groove. A horizontally protruding sidewall on one side of the limiting groove prevents the limiting component from axially dislodging from the limiting groove, and the limiting groove prevents the limiting component from rotating further. This achieves axial fixation and circumferential positioning of the reservoir and the connector, ensuring the reliability and stability of the connection between the two.

[0004] However, this existing connection structure has several problems that urgently need to be addressed. First, the limiting groove is located on the surface of the cover, causing the wall thickness of the cover to be thinner in some areas. During the engagement of the limiting component, especially when the end of the limiting component is sharp, it is very easy to puncture or scratch the cover, leading to damage to the cover. This not only affects the sealing performance of the cover and shortens its service life, but may also cause paint leakage, pollute the working environment, and even create safety hazards. Second, the limiting groove is usually close to the connection port of the cover, resulting in a thinner wall thickness at the location adjacent to the connection port. The connection port does not receive sufficient support and is prone to bending, further increasing the risk of cracking and damage to the limiting groove. Third, the design of the limiting groove usually only provides limited axial limiting function, and its cooperation range with the limiting component is small, making it difficult to effectively constrain the axial movement of the limiting component. Utility Model Content

[0005] This utility model aims to at least partially solve one of the technical problems in the related art.

[0006] Therefore, one aspect of this application proposes a cover structure for a liquid reservoir, comprising:

[0007] cover body;

[0008] A connection port is provided at the top of the cover body; the connection port is used to insert into the connection hole provided in the connection connector, the connection hole extends to the end face of the connection interface; the connection connector is provided with a first screw part and a second screw part, the first screw part is provided on the end face of the connection connector, and the second screw part is provided on the outer side wall of the end of the connection connector.

[0009] The first limiting member is disposed on the side wall of the connection port; the first limiting member is used to restrict the first screw-in portion that is screwed into the side of the cover body, so as to prevent the connection port from coming out of the connection hole.

[0010] The second limiting member is provided on the top surface of the cover body; the first limiting member is used to restrict the second screw joint from being screwed into the side of the cover body, so as to prevent the connection port from coming out of the connection hole.

[0011] The third limiting member is disposed on the top surface of the cover body, and the first limiting member and the second limiting member are both connected to the third limiting member; the third limiting member is used to attach to the end face of the connecting joint so that the first screw-in part and the second screw-in part are respectively aligned with the space of the first limiting member near the cover body and the space of the second limiting member near the cover body.

[0012] In this technical solution, the structural design achieves a stable connection with the connector by setting first and second limiting members on the side wall of the connection port and the surface of the cover body. The first and second screw-in parts of the connector do not come into close contact with the surface of the cover body, avoiding problems such as wall thickness reduction and easy breakage caused by slotting the cover body. It also prevents the first and second screw-in parts from scratching the cover body, ensuring the structural strength and sealing of the cover body. A third limiting member is further provided on the cover body, allowing both the first and second screw-in parts to be aligned and screwed in. This achieves a stable connection between the cover and the connector without altering the original structure of the connector. The third limiting member also serves as a reinforcing structure to strengthen the cover body, and the connection between the first and second limiting members enhances their stability, further improving the stability of the connection with the connector.

[0013] In some embodiments, two of each of the first, second, and third limiting members are symmetrically arranged; one end of the first limiting member is connected to one of the third limiting members, and the other end of the first limiting member is spaced apart from the other third limiting member.

[0014] In the technical solution, the structural design not only increases the limiting connection point between the connecting joint and the cover, improving the connection firmness, but also allows the first screw joint with the axial protrusion of the connecting joint to be screwed into one side of the first limiting member through a reasonable layout.

[0015] In some embodiments, the side of the first limiting member away from the cover body is flush with the side of the third limiting member away from the cover body.

[0016] In the technical solution, the structural design can control the distance between the first limiting member and the cover body, ensure that the first screw joint can be smoothly screwed into one side of the first limiting member, and improve the overall appearance quality of the cover body, reducing the processing and assembly difficulties caused by irregular shape.

[0017] In some embodiments, the first limiting member is provided with a first guide surface on the side near the cover body; the first guide surface is inclined so that the first guide surface gradually approaches the cover body along the direction of the first screw joint.

[0018] In the technical solution, the structural design makes it easier for the first screw joint to enter the space on one side of the first limiting member, and can guide the screwing in of the first screw joint, so that the first screw joint is gradually tightened, reducing the assembly difficulty.

[0019] In some embodiments, a limiting plate is provided at one end of the connection port near the cover body. The limiting plate is used to attach to the first screw joint so that the end face of the connection joint is attached to the third limiting member.

[0020] The limiting plate is integrally connected to the top surface of the cover body; the side of the first limiting member closest to the cover body is integrally connected to the limiting plate.

[0021] In the technical solution, the structural design can strengthen the connection between the connector and the cover body, improve the stability of the connector, and prevent the connector from bending during the screwing process. On the other hand, it can also reinforce the first limiting member, so that the first limiting member can stably restrict the axial movement of the first screwing part and maintain the stable connection between the connector and the cover.

[0022] In some embodiments, one end of the first limiting member is connected to the third limiting member, and the first guide surface is disposed at the other end of the first limiting member.

[0023] In the technical solution, this structure makes the first limiting member structure more compact, further improving the stability of the first limiting member and maintaining a stable connection between the connecting joint and the cover.

[0024] In some embodiments, a limiting space is provided between the first limiting member and the top surface of the cover body, so that the first screw-in portion can be screwed into the limiting space.

[0025] In the technical solution, the structural design provides an alternative structural form for the first limiting member, which allows the first limiting member to be set with a thinner thickness in the axial direction, reducing the material and weight of the cover, lowering manufacturing costs, and reducing the burden on operators after the liquid reservoir is installed on the spray gun.

[0026] In some embodiments, a limiting plate is provided at one end of the connection port near the cover body. The limiting plate is used to attach to the first screw joint so that the end face of the connection joint is attached to the third limiting member.

[0027] The limiting plate is integrally connected to the top surface of the cover body, and the limiting space is set between the limiting plate and the first limiting component; the limiting plate and the third limiting component are integrally connected.

[0028] In the technical solution, the structural design can strengthen the connection between the connector and the cover body, improve the stability of the connector, and prevent the connector from bending during the screwing process; on the other hand, the third limiting member is also strengthened to further improve the stability of the cover body.

[0029] In some embodiments, a support member is provided on the top surface of the cover body, and a second limiting member is vertically disposed on the top of the support member and extends toward the connection port.

[0030] The support member has a second guide surface on the side near the connection port, so that the second guide surface gradually approaches the connection port along the direction of the second screw joint.

[0031] In the technical solution, the structural design provides a stable support base for the second limiting member, and in conjunction with the connection port, it restricts the connection joint in two radial directions, improving the stability of the connection between the connection interface and the cover. On the other hand, the second guide surface makes it easier for the second screw-in part to enter the space on one side of the second limiting member, and can guide the screw-in of the second screw-in part, so that the second screw-in part is gradually tightened, reducing the assembly difficulty.

[0032] In some embodiments, a reinforcing plate is vertically disposed on the side of the support member away from the connection port, and the bottom end of the reinforcing plate is connected to the cover body.

[0033] In the technical solution, the structural design increases the deformation resistance of the support, prevents the second screw joint from sliding on the second guide surface, causing the second limiting member to move away from the connection port, ensures the second limiting member to block and limit the second screw joint, and ensures the stability of the connection between the cover and the connection interface.

[0034] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0035] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0036] Figure 1 A schematic diagram of the three-dimensional structure of the cover of the reservoir according to an embodiment of this application. Figure 1 ;

[0037] Figure 2 A schematic front view of the cover of the reservoir according to an embodiment of this application. Figure 1 ;

[0038] Figure 3 A schematic diagram of the three-dimensional structure of the cover of the reservoir according to an embodiment of this application. Figure 2 ;

[0039] Figure 4 A schematic front view of the cover of the reservoir according to an embodiment of this application. Figure 2 ;

[0040] Figure 5 This is a three-dimensional structural diagram of the connecting joint connected to the cover of the reservoir according to an embodiment of this application.

[0041] In the picture:

[0042] 100. Connecting joint; 101. Connecting hole; 102. First screw-on part; 103. Second screw-on part; 200. Cover body; 201. Edge retainer; 300. Connecting port; 400. First limiting member; 401. First guide surface; 500. Second limiting member; 600. Third limiting member; 700. Limiting plate; 800. Limiting space; 900. Support member; 901. Second guide surface; 1000. Reinforcing plate. Detailed Implementation

[0043] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0046] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0047] It should be noted that the reservoir typically has a cup body and a cap. The paint is placed in the cup body, and the cap is installed inside the cup body to seal it. The spray gun is usually equipped with a connecting connector 100. The cap of the reservoir is installed onto the connecting connector 100, thereby connecting the reservoir to the spray gun, so that the paint in the reservoir is fed into the spray gun for painting operations.

[0048] See Figure 5 The connector 100 typically has a connection hole 101, one end of which is connected to the spray gun, and the other end of which extends to the end face of the connector 100. The connector 100 also typically has a first screw-in portion 102 and a second screw-in portion 103. The first screw-in portion 102 is disposed on the end face of the connector 100, such that the first screw-in portion 102 protrudes axially from the end of the connection interface; the second screw-in portion 103 is disposed on the outer side wall of the end of the connector 100, such that the second screw-in portion 103 protrudes radially from the end of the connection port 300, and one side surface of the second screw-in portion 103 is flush with the end face of the connector 100.

[0049] like Figures 1 to 4 As shown in an illustrative embodiment of the liquid reservoir cover of this utility model, the liquid reservoir cover includes a cover body 200. The cover body 200 is the main structure of the liquid reservoir cover, and is generally in the shape of an upwardly convex disc. A downwardly convex retaining edge 201 is provided on the lower surface of the cover body 200. The retaining edge 201 is in the shape of a ring, so that it is inserted into the mouth of the cup and cooperates with the inner wall of the cup to seal the mouth of the cup.

[0050] The reservoir cap also includes a connection port 300. The connection port 300 is located at the top of the cap body 200, with one end of the connection port 300 penetrating through the cap body 200. When the cap body 200 is installed onto the mouth of the cup and closed, the paint in the cup can flow into the connection port 300. The connection port 300 is inserted into the connection hole 101 of the connector 100, allowing the connection port 300 and connection hole 101 to communicate, enabling the paint to enter the spray gun through the connection port 300 and connection hole 101.

[0051] The reservoir cap also includes a first limiting member 400, which is disposed on the outer side wall of the connection port 300. The first screw-in part 102 is screwed into the first limiting member 400 on the side near the cap body 200. The first limiting member 400 can prevent the first screw-in part 102 from moving away from the cap body 200 and prevent the connection joint 100 from moving away from the cap body 200, thus keeping the connection port 300 stably inserted into the connection hole 101.

[0052] The reservoir cap also includes a second limiting member 500, which is disposed on the top surface of the cap body 200. The second screw-in part 103 is screwed into the side of the second limiting member 500 near the cap body 200. The second limiting member 500 can prevent the second screw-in part 103 from moving away from the cap body 200 and prevent the connecting joint 100 from moving away from the cap body 200, thus keeping the connecting port 300 stably inserted into the connecting hole 101.

[0053] The reservoir cap also includes a third limiting member 600, which is disposed on the top surface of the cap body 200. Both the first limiting member 400 and the second limiting member 500 are connected to the third limiting member 600. When the end face of the connecting joint 100 is attached to the surface of the third limiting member 600, the first screw-on portion 102 aligns with the space of the first limiting member 400 near the cap body 200, while the second screw-on portion 103 aligns with the space of the second limiting member 500 near the cap body 200. Further rotation of the connecting joint 100 allows the first screw-on portion 102 and the second screw-on portion 103 to simultaneously rotate to the side of the first limiting member 400 and the side of the second limiting member 500, respectively. This allows the first limiting member 400 and the second limiting member 500 to simultaneously restrict the axial movement of the first screw-on portion 102 and the second screw-on portion 103, maintaining the connecting joint 100 stably connected to the cap.

[0054] This structural design allows the connector 100 and the cover to form two sets of limiting connection structures through the cooperation between the first limiting member 400 and the first screw-on portion 102, and the cooperation between the second limiting member and the second screw-on portion 103, thus improving the stability of the connection between the connector 100 and the cover. The first limiting member 400 is an independent structure set on the connection port 300, and the second limiting member 500 is an independent structure set on the cover body 200. The setting of both does not change the thickness of the cover body 200, maintaining the structural strength of the cover body 200. The first screw-on portion 102 and the second screw-on portion 103 cooperate with the independent structures of the first limiting member 400 and the second limiting member 500, respectively, without needing to make close contact with the surface of the cover body 200, thereby avoiding scratches on the cover body 200 by the first screw-on portion 102 and the second screw-on portion 103 and ensuring the sealing performance of the cover body 200.

[0055] The connecting joint 100 retains its original structure. The arrangement of the first screw-on portion 102 and the second screw-on portion 103 on the connecting joint 100 ensures that the first screw-on portion 102 is closer to the axis of the connecting joint 100 than the second screw-on portion 103. Consequently, the first limiting member 400 is closer to the connection port 300 than the second limiting member 500, thus separating the second limiting member 500 from the connection port 300. The first limiting member 400 and the second limiting member 500 are connected by a third limiting member 600, allowing the second limiting member 500 to receive stable radial support and maintain a stable radial position. This, in turn, stably prevents axial movement of the second screw-on portion 103, maintaining a stable connection between the connecting joint 100 and the cover. Similarly, the first limiting member 400 receives stable support from the third limiting member 600, effectively preventing axial movement of the second screw-on portion 103.

[0056] Furthermore, the third limiting member 600 is a protruding structure provided on the surface of the cover body 200, which can directly serve as a reinforcing structure to strengthen and support the cover body 200, thereby improving the cover body 200's resistance to deformation. In addition, the third limiting member 600, by cooperating with the end face of the connecting joint 100, simultaneously aligns the first screw-in part 102 and the second screw-in part 103, ensuring that both can be screwed in accurately at the same time, improving the convenience of assembly.

[0057] See Figure 1 and Figure 3In some implementations, two of each of the first limiting member 400, second limiting member 500, and third limiting member 600 are symmetrically arranged, such that adjacent first limiting members 400 and second limiting members 500 are connected by a corresponding third limiting member 600. Two of each of the first screw-in portions 102 and second screw-in portions 103 are typically symmetrically arranged on the connecting joint 100, such that each first screw-in portion 102 screws into one side of a corresponding first limiting member 400, and each second screw-in portion 103 can screw into one side of a corresponding second limiting member 500. One end of the first limiting member 400 is connected to a third limiting member 600, and the other end of the first limiting member 400 is spaced apart from another third limiting member 600, thereby ensuring the connection between the first limiting member 400 and the third limiting member 600, and simultaneously ensuring that the first screw-in portion 102 can move axially to a position spatially aligned with the side of the first limiting member 400 near the cover body 200.

[0058] This structural design allows the connector 100 to be connected to the cover through four sets of limiting connection structures, increasing the number of limiting connection points and thus further improving the stability of the connection. In addition, one end of the first limiting member 400 is connected to the third limiting member 600, so that the third limiting member 600 supports and reinforces the first limiting member 400. At the same time, since the third limiting member 600 is connected to the cover body 200, the third limiting member 600 closes one end of the space between the first limiting member 400 and the cover body 200. The end of the first limiting member 400 that is not connected to the third limiting member 600 is spaced apart from the other third limiting member 600, so that the first screw-in part 102 can move axially to a position where the space of the first limiting member 400 is relatively aligned with the space of the cover body 200. The other end of the space between the first limiting member 400 and the cover body 200 is left open, so that the first screw-in part 102 can be screwed into the space of the first limiting member 400 near the cover body 200. The first limiting member 400 can prevent the first screw-in part 102 from moving away from the cover body 200, thus maintaining a stable connection between the connecting joint 100 and the cover.

[0059] See Figures 1 to 4In some embodiments, the side of the first limiting member 400 away from the cover body 200 is flush with the side of the third limiting member 600 away from the cover body 200. This structural design makes the lower surface of the first limiting member 400 closer to the cover body 200 than the upper surface of the third limiting member 600. When the end face of the connecting joint 100 is attached to the upper surface of the third limiting member 600, the axially protruding first screw-in portion 102 can be accurately aligned with the lower space of the first limiting member 400, allowing the first screw-in portion 102 to be accurately screwed in and restricted by the first limiting member 400. In addition, this structural design improves the overall appearance quality of the cover, making the cover smoother in appearance and reducing the complexity of processing molds caused by irregular shapes.

[0060] See Figures 1 to 2 In some embodiments, the first limiting member 400 has a first guide surface 401 on the side near the cover body 200. The first guide surface 401 is inclined, so that the first guide surface 401 gradually approaches the cover body 200 along the direction in which the first screw-in portion 102 is screwed in, and the width of the space on the side of the first limiting member 400 near the cover body 200 gradually narrows along the direction in which the first screw-in portion 102 is screwed in. This structural design makes the opening for the first screw-in portion 102 to enter the space on the side of the first limiting member 400 near the cover body 200 larger, making it easier for the first screw-in portion 102 to enter. In addition, as the first screw-in part 102 is screwed into the space near the cover body 200 of the first limiting member 400, the first screw-in part 102 slides on the first guide surface 401. At the same time, the first limiting member 400 gradually pushes the first screw-in part 102 towards the cover body 200 through the first guide surface 401, so that the connection interface is gradually pressed onto the cover as the first screw-in part 102 is screwed in, which facilitates the stable connection of the connection interface with the cover.

[0061] See Figures 1 to 4 In some embodiments, a limiting plate 700 is provided at one end of the connection port 300 near the cover body 200. The limiting plate 700 is used to attach to the first screw-on part 102, thereby preventing the connection joint 100 from moving further towards the cover body 200. At the same time, it causes the end face of the connection joint 100 to attach to the third limiting member 600. Thus, through the cooperation between the third limiting member 600 and the end face of the connection joint 100, the first screw-on part 102 and the second screw-on part 103 are simultaneously aligned with the lower space of the first limiting member 400 and the lower space of the second limiting member 500, respectively.

[0062] The limiting plate 700 is integrally connected to the top surface of the cover body 200, thus serving as a reinforcing structure for the cover body 200. The side of the first limiting member 400 closest to the cover body 200 is integrally connected to the limiting plate 700, enabling the limiting plate 700 to reinforce the first limiting member 400.

[0063] This structural design ensures that the limiting disc 700 contacts the first screw-on portion 102, preventing the cover body 200 from contacting the first screw-on portion 102 and thus preventing the cover body 200 from being scratched by the first screw-on portion 102. The limiting disc 700 strengthens the cover body 200, improving its resistance to deformation and enhancing its stability. The limiting disc 700 is positioned on both the end of the connecting port 300 and the cover body 200, thereby increasing the strength of the connection between the connecting port 300 and the cover body 200, improving the stability of the connecting port 300, and preventing the connecting port 300 from bending relative to the cover body 200, which could lead to cracking at the connection. The limiting disc 700 also axially limits the connecting joint 100, ensuring that the third limiting member 600 fits against the end face of the connecting joint 100, while aligning the first screw-on portion 102 and the second screw-on portion 103, resulting in a precise and limited connection between the connecting joint 100 and the cover.

[0064] See Figures 1 to 2 In some embodiments, one end of the first limiting member 400 is connected to the third limiting member 600, and the first guide surface 401 is disposed at the other end of the first limiting member 400. This structural design ensures that only the portion of the first limiting member 400 with the first guide surface 401 at one end and the side surface of the first limiting member 400 away from the cover body 200 are not connected to other structures, while the rest of the first limiting member 400 is connected to other structures. This improves the tightness of the connection between the first limiting member 400 and other structures, further enhancing the stability of the first limiting member 400. This allows the first limiting member 400 to stably prevent the first screw-on portion 102 from moving axially, maintaining a stable connection between the connecting joint 100 and the cover body.

[0065] See Figures 3 to 4 In some embodiments, a limiting space 800 is provided between the first limiting member 400 and the top surface of the cover body 200. The first screw-in part 102 screws into the limiting space 800, and the first limiting member 400 prevents the first screw-in part 102 from moving away from the cover body 200, maintaining a stable connection between the connecting joint 100 and the cover body. This structural design provides another structural form of the first limiting member 400, allowing the first limiting member 400 to have a thinner thickness in the axial direction, reducing the material and weight of the cover body and lowering manufacturing costs.

[0066] See Figures 1 to 4In some embodiments, a limiting plate 700 is provided at one end of the connection port 300 near the cover body 200. The limiting plate 700 is used to attach to the first screw-on part 102, thereby preventing the connection joint 100 from moving further towards the cover body 200. At the same time, it causes the end face of the connection joint 100 to attach to the third limiting member 600. Thus, through the cooperation between the third limiting member 600 and the end face of the connection joint 100, the first screw-on part 102 and the second screw-on part 103 are simultaneously aligned with the lower space of the first limiting member 400 and the lower space of the second limiting member 500, respectively.

[0067] The limiting plate 700 is integrally connected to the top surface of the cover body 200, thus serving as a reinforcing structure for the cover body 200. A limiting space 800 is disposed between the limiting plate 700 and the first limiting member 400, separating the first limiting member 400 from the limiting plate 700. The limiting space 800 can extend from one end of the first limiting member 400 to the other end. The limiting plate 700 is integrally connected to the third limiting member 600, enabling the limiting plate 700 to reinforce the third limiting member 600.

[0068] This structural design ensures that the limiting disc 700 contacts the first screw-on portion 102, preventing the cover body 200 from contacting the first screw-on portion 102 and thus preventing the cover body 200 from being scratched by the first screw-on portion 102. The limiting disc 700 strengthens the cover body 200, improving its resistance to deformation and enhancing its stability. The limiting disc 700 is positioned on both the end of the connecting port 300 and the cover body 200, thereby increasing the strength of the connection between the connecting port 300 and the cover body 200, improving the stability of the connecting port 300, and preventing the connecting port 300 from bending relative to the cover body 200, which could lead to cracking at the connection. The limiting disc 700 also axially limits the connecting joint 100, ensuring that the third limiting member 600 fits against the end face of the connecting joint 100, while aligning the first screw-on portion 102 and the second screw-on portion 103, resulting in a precise and limited connection between the connecting joint 100 and the cover. The limiting plate 700 also reinforces the third limiting component 600, enabling the third limiting component 600 to stably support the first limiting component 400 and the second limiting component 500.

[0069] See Figures 1 to 4In some embodiments, a support member 900 is provided on the top surface of the cover body 200, and a second limiting member 500 is vertically disposed at the top end of the support member 900, such that the second limiting member 500 is disposed on the cover body 200 through the support member 900, and the support member 900 provides space between the second limiting member 500 and the cover body 200 for the second screw-in portion 103 to screw into. The second limiting member 500 extends relative to the support member 900 towards the connection port 300, so that the limiting member is on the outer side and does not obstruct the screwing into of the second screw-in portion 103 on the outer wall of the connection joint 100.

[0070] The support member 900 is provided with a second guide surface 901 on the side near the connection port 300, so that the second guide surface 901 gradually approaches the connection port 300 along the screwing direction of the second screwing part 103, and the distance between the support member 900 and the connection port 300 gradually narrows along the screwing direction of the second screwing part 103.

[0071] This structural design provides a stable support base for the second limiting member 500, allowing the second limiting member 500 to be positioned further outward than the first limiting member 400. Furthermore, the second limiting member 500 is spaced apart from the cover body 200 and matches the radial position of the second screw-in portion 103, enabling the second screw-in portion 103 to smoothly screw into the lower side of the second limiting member 500, thus achieving a limiting connection. In addition, the second guide surface 901 makes the opening of the second screw-in part 103 into the space of the second limiting member 500 near the cover body 200 larger, making it easier for the second screw-in part 103 to enter. As the first screw-in part 102 screws into the space of the second limiting member 500 near the cover body 200, the second screw-in part 103 slides on the second guide surface 901. At the same time, the support member 900 gradually pushes the second screw-in part 103 towards the connection port 300 through the second guide surface 901, so that the connection interface is gradually pressed against the connection port 300 by the support member 900 as the second screw-in part 103 screws in, which facilitates the stable connection of the connection interface with the cover.

[0072] See Figures 1 to 4In some embodiments, a reinforcing plate 1000 is vertically disposed on the side of the support member 900 away from the connection port 300, and the bottom end of the reinforcing plate 1000 is connected to the cover body 200. This structural design avoids the support member 900 from deforming outward due to the radial push of the support member 103 after the second screw joint 103 is screwed in. The reinforcing plate 1000 increases the deformation resistance of the support member 900, ensuring the radial stability of the support member, so that the second limiting member 500 is kept in a stable radial position. The second limiting member 500 is axially aligned with the second screw joint 103, stably blocking and limiting the second screw joint 103, ensuring the stability of the connection between the cover and the connection interface.

[0073] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0074] The above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A cover for a liquid reservoir, characterized in that, include: cover body; A connection port is provided at the top of the cover body; the connection port is used to insert into the connection hole of the connection connector, and the connection hole extends to the end face of the connection port; the connection connector is provided with a first screw-in part and a second screw-in part, the first screw-in part is provided on the end face of the connection connector, and the second screw-in part is provided on the outer side wall of the end of the connection connector. A first limiting member is disposed on the side wall of the connection port; the first limiting member is used to restrict the first screw-in portion from being screwed into the side of the cover body, so as to prevent the connection port from coming out of the connection hole. The second limiting member is disposed on the top surface of the cover body; the first limiting member is used to restrict the second screw-in portion screwed into the side of the cover body that is close to it, so as to prevent the connection port from coming out of the connection hole. A third limiting member is disposed on the top surface of the cover body. The first limiting member and the second limiting member are both connected to the third limiting member. The third limiting member is used to attach to the end face of the connecting joint so that the first screw-in part and the second screw-in part are respectively aligned with the space of the first limiting member near the cover body and the space of the second limiting member near the cover body.

2. The cover of the reservoir according to claim 1, characterized in that, Two of each of the first limiting member, the second limiting member, and the third limiting member are symmetrically arranged; one end of the first limiting member is connected to one of the third limiting members, and the other end of the first limiting member is spaced apart from the other of the third limiting members.

3. The cover of the reservoir according to claim 1, characterized in that, The side of the first limiting member away from the cover body is flush with the side of the third limiting member away from the cover body.

4. The cover of the reservoir according to claim 1, characterized in that, The first limiting member has a first guide surface on the side near the cover body; the first guide surface is inclined so that the first guide surface gradually approaches the cover body along the direction of the first screw joint.

5. The cover of the reservoir according to claim 4, characterized in that, A limiting plate is provided at one end of the connection port near the cover body. The limiting plate is used to attach to the first screw joint so that the end face of the connection joint is attached to the third limiting member. The limiting disc is integrally connected to the top surface of the cover body; the side of the first limiting member closest to the cover body is integrally connected to the limiting disc.

6. The cover of the reservoir according to claim 5, characterized in that, One end of the first limiting member is connected to the third limiting member, and the first guide surface is disposed at the other end of the first limiting member.

7. The cover of the reservoir according to claim 1, characterized in that, A limiting space is provided between the first limiting member and the top surface of the cover body, so that the first screw-in part can be screwed into the limiting space.

8. The cover of the reservoir according to claim 7, characterized in that, A limiting plate is provided at one end of the connection port near the cover body. The limiting plate is used to attach to the first screw joint so that the end face of the connection joint is attached to the third limiting member. The limiting plate is integrally connected to the top surface of the cover body, and the limiting space is disposed between the limiting plate and the first limiting member; the limiting plate is integrally connected to the third limiting member.

9. The cover of the reservoir according to claim 1, characterized in that, A support member is provided on the top surface of the cover body, and the second limiting member is vertically disposed at the top of the support member and extends toward the connection port. The support member has a second guide surface on the side near the connection port, so that the second guide surface gradually approaches the connection port along the direction in which the second screw part is screwed in.

10. The cover of the reservoir according to claim 9, characterized in that, A reinforcing plate is vertically arranged on the side of the support member away from the connection port, and the bottom end of the reinforcing plate is connected to the cover body.

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