Distributor valve box and injection molding process thereof

Abstract

This application provides a distribution valve box and its injection molding process, relating to the field of vehicle air suspension technology. The distribution valve box includes a housing, at least two valve core assemblies, and a sealing element. The housing has a valve cavity and an internal passage. At least a portion of the valve core assembly is located in the valve cavity. The internal passage communicates with the outside of the distribution valve box. The valve port of the valve core assembly can open and close the internal passage and the valve cavity. The internal passage includes at least two working passages, at least one of which has a length direction. Along its length direction, one end is an open end, which is sealed by the sealing element, and the other end is an inner sealed end, whose length direction is blocked by the wall of the housing. This application, by having one end of the working passage directly blocked by the channel wall of the internal passage without the need for additional sealing elements, can reduce the number of sealing points, reduce the risk of leakage, reduce the number of parts, and improve production efficiency.

Description

Technical Field

[0001] This application relates to the field of vehicle air suspension technology, and more specifically, to a distribution valve box and its injection molding process. Background Technology

[0002] The electromagnetic distribution valve box is a widely used component in the open air suspension system of automobiles. It is mainly used in conjunction with the compressor system to distribute (inflate or deflate) the pressure of the four air springs corresponding to the four wheels of the passenger car and the system's air tank, thereby achieving the adjustment of the vehicle's height and attitude.

[0003] The electromagnetic distribution valve box typically has a box-shaped housing. Inside the housing are cavities for accommodating the valve core assembly and internal passages for fluid flow. The housing also features electrical connection ports and a pressure sensor that works in conjunction with system pressure monitoring. During operation, the pressure sensor detects changes in air pressure within the internal passage. The control unit in the system then controls a specific solenoid valve to open. Gas entering the internal passage flows through the corresponding solenoid valve's port and exhaust port, then to the corresponding air spring, thereby raising the corresponding position on the chassis. Conversely, opening and closing the corresponding solenoid valve releases air, lowering the chassis to the corresponding position.

[0004] The internal passages of the casing typically include two transverse passages and one longitudinal connecting passage. The two transverse passages are parallel to each other, and the longitudinal connecting passage connects the two transverse passages in the gas path near one end. In one related technology, both transverse passages are through holes, and their ends are sealed by means of ball seals or similar methods along their length. However, in this related technology, sealing positions are required at both ends of the transverse passages, resulting in a large number of sealing positions and increasing the risk of leakage. Furthermore, multiple sealing ends require secondary sealing using additional sealing components such as ball seals and rubber parts, leading to a large number of parts, cumbersome assembly processes, low assembly efficiency, and high manufacturing costs.

[0005] In view of this, it is necessary to propose a distribution valve box and its injection molding process that can reduce sealing locations, lower leakage risk and improve assembly efficiency. Summary of the Invention

[0006] The purpose of this application is to provide a distribution valve box and its injection molding process, so as to solve to some extent the technical problems of the distribution valve box in the related art, such as many internal passage sealing points, high leakage risk, large number of parts, and low assembly efficiency.

[0007] To achieve the above objectives, this application adopts the following technical solution: In a first aspect, this application provides a distribution valve box, including a housing, at least two valve core assemblies, and a sealing member. The housing is provided with a valve cavity and an internal passage. At least a portion of the valve core assembly is located in the valve cavity. The internal passage is connected to the outside of the distribution valve box. The valve port of the valve core assembly is capable of connecting and closing the internal passage and the valve cavity. The internal passage includes at least two working passages. At least one of the working passages has a length direction. In its length direction, one end is an open end, which is blocked by the sealing member, and the other end is an inner sealing end, the length direction of which is blocked by the wall of the housing.

[0008] In the above technical solution, one end of the working passage is blocked by a sealing element in its extension direction, while the other end is directly blocked by the channel wall of the internal passage itself, eliminating the need for an additional seal at that end. Compared to related technologies where both ends of the working passage are through holes and require sealing, this application can significantly reduce the number of sealing locations, reduce leakage points, and thus reduce the risk of leakage; furthermore, the end blocked by the channel wall does not require an additional sealing element, reducing the number of parts and assembly steps, improving production efficiency, and lowering manufacturing costs.

[0009] Secondly, this application also provides an injection molding process for a distribution valve box, used to manufacture the distribution valve box as described in any of the above claims, comprising: forming the valve cavity and the internal passage inside the housing by integral injection molding, and forming an electrical connection port on one side of the housing by injection molding; wherein, the mold action of the housing causes at least one of the working passages to form the open end and the inner sealing end; and during demolding, the punch of the working passage is pulled out from the open end away from the inner sealing end. This process can form the housing and its internal valve cavity and internal passage in one step, reducing the number of parts and connection gaps, and improving structural strength and sealing reliability. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation on the scope.

[0011] Figure 1 A schematic diagram of a distribution valve box provided in an embodiment of this application; Figure 2 for Figure 1 A rear view of the housing of the distribution valve box shown. Figure 3 for Figure 2 The AA cross-sectional view shows the first passage, the second passage, and the conductive passage, wherein the opening ends of the first passage and the second passage face the electrical connection port on one side of the first plane; Figure 4 This is a schematic diagram of another structure of the conduction path in the internal pathway; Figure 5 for Figure 2 A bottom view of the distribution valve box shown; Figure 6 for Figure 5 A schematic diagram of the DD rotating section, with the DD section passing through the centerline of the RES air inlet; Figure 7 for Figure 5 The schematic diagram of the II rotating section, with section II passing through the centerline of the P air inlet; Figure 8 for Figure 5 A schematic diagram of the KK rotation section, with the KK section passing through the center lines of the air spring controlled solenoid valves FR and FL; Figure 9 This is a cross-sectional schematic diagram of another distribution valve box provided in an embodiment of this application, showing a first passage, a second passage, and a conductive passage, wherein the opening ends of the first passage and the second passage are away from the electrical connection port on one side of the first plane M.

[0012] Explanation of reference numerals in the attached figures: 100. Distribution valve box; 1. Housing; 11. Valve cavity; 111. First side wall; 112. Second side wall; 113. Third side wall; 12. Electrical connection port; 13. Connector mounting base; 131. P connector mounting base; 132. RES connector mounting base; 14. Exhaust port connector; 2. Valve core assembly; 21. Valve port; 22. Sealing ring; 27. Fifth solenoid valve; 3. Sealing component; 4. Internal passage; 40. Working passage; 41. First passage; 411. First open end; 412. Inner sealing end; 42. Second passage; 421. Third open end; 43. Conducting passage; 431. Second open end; 432. Fourth open end; 44. First intersection; 45. Second intersection; 5. Air inlet; 51. P air inlet; 52. RES air inlet; 8. Pressure sensor; M. First plane. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terms "upper," "lower," "left," "right," "inner," "outer," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0015] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "connection," "linked," "conducting," and "connecting" 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 path. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0016] Please see Figures 1 to 8 This application provides a distribution valve box 100, which can be applied to the open system of automotive air suspension. It is used to cooperate with the compressor system to distribute the air pressure of multiple air springs and air tanks in the vehicle, thereby realizing the adjustment of vehicle height and attitude.

[0017] The distribution valve box 100 includes a housing 1, at least two valve core assemblies 2, and a sealing element 3. The housing 1 has a valve cavity 11 and an internal passage 4. At least a portion of the valve core assembly 2 is located within the valve cavity 11. The internal passage 4 communicates with the outside of the distribution valve box 100. The valve port 21 of the valve core assembly 2 can open and close the internal passage 4 and the valve cavity 11. That is, by opening and closing the valve core assembly 2, the internal passage 4 can be selectively connected to or disconnected from the valve cavity 11, thereby controlling the flow direction of gas. The valve core assembly 2 can be a solenoid valve, including a solenoid valve core body, a portion of which is located within the valve cavity 11.

[0018] The internal passage 4 includes at least two working passages 40 and a connecting passage 43 connecting the working passages 40. In this embodiment, the working passages 40 include a first passage 41 and a second passage 42 arranged parallel to each other, and the connecting passage 43 connects the first passage 41 and the second passage 42 in the gas path. The extending direction of the connecting passage 43 intersects (e.g., is approximately perpendicular to) the extending directions of the first passage 41 and the second passage 42, and connects the first passage 41 and the second passage 42 near one end.

[0019] At least one of the working passages 40 has a length direction, with one end being an open end blocked by a sealing member 3, and the other end being an inner sealed end. The length direction of the inner sealed end is blocked by the wall of the housing, meaning that the inner sealed end does not penetrate the housing in the length direction, and the conducting passage 43 is closer to the inner sealed end than the open end. The sealing member 3 can be, for example, a ball seal, a sealing plug, a sealing screw, etc., used to seal the open end of the working passage 40 or the conducting passage 43.

[0020] It should be noted that the inner sealing end can be a blind hole in the working passage, that is, the end of the blind hole that is blocked by its own bottom wall is the inner sealing end; or it can be a through hole in the working passage, where the flow path of the through hole in the extension direction is blocked by the channel wall of the inner passage.

[0021] In the above structure, one end of the working passage 40 is sealed by the sealing element 3, while the other end is directly blocked by the channel wall of the internal passage 4 itself, eliminating the need for an additional seal at that end. Compared to related technologies where both ends of the working passage are through holes and require sealing with ball seals or similar methods, this application significantly reduces the number of sealing positions (i.e., sealing points), reduces leakage points, and lowers the risk of leakage. Furthermore, the end blocked by the channel wall does not require an additional sealing element, thereby reducing the number of parts, simplifying the assembly process, improving production efficiency, and lowering manufacturing costs.

[0022] Furthermore, the walls of the internal passage 4 are integrally injection molded. That is, the housing 1, the valve cavity 11 located inside the housing 1, and the walls of each channel of the internal passage 4 are integrally formed through a single injection molding process. This arrangement avoids the connection gaps caused by splicing multiple pipeline sections and the additional sealing requirements therein, further reducing leakage points; on the other hand, the integrally molded structure has higher structural strength and dimensional accuracy, which is beneficial to improving the sealing reliability and service life of the distribution valve box 100.

[0023] Please refer to this carefully. Figure 3 In one embodiment of this application, the first passage 41 is a blind hole, which has a first open end 411 and an inner sealed end 412. The first open end 411 is sealed by the sealing member 3. That is, one end of the first passage 41 along its extension direction (the first open end 411) is open and sealed by the sealing member 3, while the other end (the inner sealed end 412) is a closed blind end. This blind end is formed by the direct obstruction of the channel wall of the internal passage 4, without the need for additional sealing members.

[0024] The inner wall of the passage 43 intersects the inner wall of the blind hole (i.e., the first passage 41) at the first intersection 44. Along the extension direction of the passage 43, the first intersection 44 is blocked by the inner wall of the blind hole. The passage 43 has a second open end 431, which is disposed opposite to the first intersection 44 and is blocked by the sealing member 3. In other words, one end of the passage 43 along its extension direction (the second open end 431) is open and blocked by the sealing member 3, while the other end (at the first intersection 44) terminates at the inner wall of the first passage 41 and is blocked by it, thus eliminating the need for a seal at that end.

[0025] The inner wall of the second passage 42 intersects the inner wall of the guiding passage 43 at the second intersection 45. Along the extension direction of the second passage 42, the second intersection 45 is blocked by the inner wall of the guiding passage 43. The second passage 42 has a third opening end 421, which is disposed opposite to the second intersection 45, and the third opening end 421 is blocked by the sealing member 3. That is, one end of the second passage 42 along its extension direction (the third opening end 421) is open and blocked by the sealing member 3, and the other end (at the second intersection 45) terminates at the inner wall of the guiding passage 43 and is blocked by it.

[0026] Therefore, in this embodiment, each of the three passages—the first passage 41, the second passage 42, and the conductive passage 43—only has one end (the open end) that needs to be sealed by the sealing member 3, while the other end is naturally blocked by the channel wall of the adjacent passage. Thus, the entire internal passage 4 only needs to be set with three sealing positions (i.e., the first open end 411, the second open end 431, and the third open end 421), which significantly reduces the number of sealing points compared to related technologies, significantly reduces the risk of leakage, and improves assembly efficiency. The first open end 411 is the opening of the first passage 41, the second open end 431 is the opening of the conductive passage 43, and the third open end 421 is the opening of the second passage 42. All of these are the ends sealed by the sealing member 3, and the mold cores of the three passages are pulled out from these three open ends respectively.

[0027] During gas flow, the conduction passage 43 is connected to the air inlet 5. When working, the fluid enters the conduction passage 43 through the air inlet 5, and then enters the first passage 41 and the second passage 42 through the conduction passage 43 respectively. When the valve port 21 of the corresponding valve core assembly 2 is opened, the gas in the first passage 41 and the second passage 42 enters the corresponding valve chamber 11 and flows into the corresponding air spring through the valve chamber 11, thereby realizing the adjustment of the vehicle height.

[0028] Please see Figure 3The axes of the valve core assembly 2 are parallel, and a first plane M is defined. The first plane M is parallel to the axis of the valve core assembly 2 and passes through the wall corresponding to the conduction passage 43. The first opening end 411 and the third opening end 421 are located on the same side of the first plane M. This arrangement ensures that the sealing ends of the first passage 41 and the second passage 42 (i.e., the first opening end 411 and the third opening end 421) are located on the same side of the housing 1, which facilitates the unified installation of the sealing parts 3 and the unified arrangement of the mold core pulling direction, and helps to simplify the mold structure and improve assembly and production efficiency.

[0029] In this embodiment (see) Figures 1 to 3 The housing 1 includes an electrical connection port 12. A first opening end 411 and a third opening end 421 face the electrical connection port 12 on one side of the first plane M, and the extension path of the electrical connection port 12 intersects with the extension paths of the first opening end 411 and the third opening end 421. In other words, the electrical connection port 12, the opening ends of the first passage 41 and the second passage 42 are located on the same side of the first plane M, and their virtual extension paths intersect in space. This arrangement is compact and imposes corresponding requirements on the injection molding and demolding sequence, as detailed in the injection molding process section below.

[0030] Furthermore, the housing 1 is provided with a valve cavity 11 for accommodating the valve core assembly 2 (e.g., a solenoid valve core body), and a portion of the valve core assembly 2 is located within the valve cavity 11. The inner cavity sidewall of the valve cavity 11 includes a first sidewall 111, a second sidewall 112, and a third sidewall 113. The first sidewall 111 and the third sidewall 113 extend along the mounting direction of the valve core assembly 2 and are vertical sidewalls. The diameter of the first sidewall 111 is larger than the diameter of the third sidewall 113. The second sidewall 112 is a variable diameter section, that is, the second sidewall 112 is a transition section between the first sidewall 111 and the third sidewall 113. After the valve core assembly 2 is installed into the valve cavity 11, the sealing ring 22 at the lower end of the valve core assembly 2 abuts against the third side wall 113. That is, the inner and outer ring walls of the sealing ring 22 respectively seal against the core of the valve core assembly 2 and the third side wall 113, thereby isolating the air inlet and exhaust ends of the valve cavity 11. The valve port 21 can be opened and closed by the action of the valve core assembly 2. This stepped valve cavity 11 structure facilitates the installation and positioning of the valve core assembly 2 and achieves reliable sealing through the sealing ring 22.

[0031] In this embodiment, multiple valve core assemblies 2 (solenoid valves) and pressure sensors 8 are integrated on the housing 1. Four of the valve core assemblies 2 are spring-controlled solenoid valves, denoted as RL, RR, FL, and FR. Spring-controlled solenoid valves RR and FR, along with their P inlet 51, are configured for the first passage 41; spring-controlled solenoid valves RL and FL, along with their RES inlet 52, are configured for the second passage 42.

[0032] The air inlet 5 includes a P inlet 51 and an RES inlet 52. The P inlet 51 is connected to the air compressor and is directly connected to the first passage 41, meaning that the gas passing through the P inlet 51 can directly enter the internal passage 4. The P inlet 51 is used preferentially when the vehicle is at low speed or stationary. The RES inlet 52 is connected to the air tank. Due to the high pressure of the air tank, a fifth solenoid valve 27 corresponding to the RES inlet 52 is provided inside the housing 1 to control the RES inlet 52. That is, the gas entering the air passage through the RES inlet 52 is controlled by the fifth solenoid valve 27. When the fifth solenoid valve 27 is open, the gas enters the internal passage 4 through the RES inlet 52 and the valve port 21 of the fifth solenoid valve 27. The gas entering the internal passage 4 can be sensed by the pressure sensor 8.

[0033] After the gas enters the internal passage 4, by controlling the opening of any valve core assembly 2 among the four air spring control solenoid valves RL, RR, FL, and FR, the gas in the air passage can enter the corresponding valve chamber 11 through the valve port 21 of the corresponding valve core assembly 2, and then enter the corresponding air spring to inflate the corresponding airbag, thereby raising the corresponding position of the vehicle body; when it is necessary to lower the corresponding position of the vehicle body, the conduction of the corresponding valve core assembly 2 can be controlled to allow the gas in the air spring to be discharged through the internal passage 4 and the corresponding exhaust port connector 14.

[0034] Please see Figures 5 to 8 The lower part of the housing 1 has connector mounting bases 13 corresponding to the RES inlet 52 and the P inlet 51, respectively. The RES inlet 52 and the P inlet 51 are formed on the connector mounting bases 13 (i.e., the RES connector mounting base 132 and the P connector mounting base 131). The P inlet connector and the RES inlet connector are mounted on the corresponding P connector mounting base 131 and the RES connector mounting base 132. The lower part of the housing 1 also has connector mounting bases 13 and exhaust port connectors 14 corresponding to the four air spring controlled solenoid valves. The P inlet connector, the RES inlet connector, and the exhaust port connectors 14 of the four air spring controlled solenoid valves are all located on the same side below the housing 1. In this layout, the P inlet 51 is located in the same horizontal row as the exhaust port connectors 14 of solenoid valves RR and FR; the RES inlet 52 is located in the same horizontal row as the exhaust port connectors 14 of solenoid valves RL and FL; the RES inlet 52 is located in the same column as the P inlet 51; the RR and RL exhaust port connectors 14 are located in the same column; and the FR and FL exhaust port connectors 14 are located in the same column. This layout is neat and compact, facilitating pipeline connection and overall assembly.

[0035] Please see Figure 6 and Figure 7The air-spring controlled solenoid valves RR and FR are located on the upper part of the housing 1, perpendicular to the first passage 41 and offset from it by a certain distance, forming a cross-shaped structure in space. The lower end of their valve chambers 11 is connected to the first passage 41, thus forming the air intake end. The exhaust port connectors 14 of the solenoid valves RR and FR are located on the lower part of the housing 1, with their axes parallel to the axes of the solenoid valves RR and FR. Since the axis of the exhaust port connector 14 is offset from the axis of the solenoid valves RR and FR by a certain distance, the exhaust ends of the solenoid valves RR and FR are located on the side wall of their valve chambers 11 and are connected to their respective exhaust port connectors 14 through the air passage formed inside the housing 1. The exhaust port connectors 14 are installed on the connector fixing seat 13 at the lower part of the housing 1, with their installation direction opposite to that of the air-spring controlled solenoid valves RR and FR, that is, the air-spring controlled solenoid valves RR and FR are installed from top to bottom, and their exhaust port connectors 14 are installed from bottom to top.

[0036] Similarly, the air-spring controlled solenoid valves RL and FL are located on the upper part of the housing 1, perpendicular to the second passage 42 and offset from it by a certain distance, forming a cross-shaped structure in space. The lower end of their valve chambers 11 is connected to the second passage 42, thus forming the air inlet. The exhaust port connectors 14 of the solenoid valves RL and FL are located on the lower part of the housing 1, with their axes parallel to the axes of the solenoid valves RL and FL. Since the axis of the exhaust port connector 14 is offset from the axis of the solenoid valves RL and FL by a certain distance, the exhaust ends of the solenoid valves RL and FL are located on the side wall of their valve chambers 11 and are connected to their respective exhaust port connectors 14 through the air passage formed inside the housing 1. The exhaust port connectors 14 are installed on the connector fixing seat 13 at the lower part of the housing 1, with their installation direction opposite to that of the air-spring controlled solenoid valves RL and FL, that is, the air-spring controlled solenoid valves RL and FL are installed from top to bottom, and their exhaust port connectors 14 are installed from bottom to top.

[0037] The way in which the RES intake port 52 is connected to the internal passage 4 via the fifth solenoid valve 27 is basically the same as the way in which each exhaust port connector 14 is connected to the internal passage 4 via the air spring controlling the solenoid valves RL, RR, FL, FR, and so on. It will not be described again here.

[0038] Please see Figure 4 This application also provides another distribution valve box 100, which is mainly different from the previous embodiment in the structure of the conduction passage 43 in the internal passage 4. The remaining structure can be referred to the previous embodiment, and the similarities will not be repeated.

[0039] In this embodiment, the working passage 40 includes a first passage 41 and a second passage 42. The inner wall of the first passage 41 and the inner wall of the connecting passage 43 intersect at a first intersection 44. The first passage 41 has a first open end 411. Along the extending direction of the first passage 41, the first open end 411 and the first intersection 44 are arranged opposite to each other, and the first open end 411 is blocked by the sealing member 3. The first intersection 44 is blocked by the inner wall of the connecting passage 43. That is, one end of the first passage 41 (the first open end 411) is open and blocked by the sealing member 3, and the other end (at the first intersection 44) terminates at the inner wall of the connecting passage 43 and is blocked by it, without the need for additional sealing members.

[0040] The inner wall of the second passage 42 and the inner wall of the guiding passage 43 intersect at the second intersection 45. Along the extension direction of the second passage 42, the second intersection 45 is blocked by the inner wall of the guiding passage 43. The second passage 42 has a third opening end 421. Along the extension direction of the second passage 42, the third opening end 421 is disposed opposite to the second intersection 45, and the third opening end 421 is blocked by the sealing member 3.

[0041] The conductive passage 43 has a second open end 431 and a fourth open end 432, both of which are blocked by the sealing member 3. That is, in this embodiment, the conductive passage 43 is a through hole with two oppositely arranged open ends, both of which are blocked by the sealing member 3.

[0042] In this embodiment, the mold cores (mold cores) of the first passage 41 and the second passage 42 are extracted from the first opening end 411 and the third opening end 421, respectively; since the conducting passage 43 has two opening ends, the second opening end 431 and the fourth opening end 432, its mold core can be extracted from either the second opening end 431 or the fourth opening end 432, thus providing greater flexibility for mold structure design and demolding action arrangement.

[0043] Please see Figure 9 Based on the above embodiments, further embodiments can be obtained by designing the first opening end 411 and the third opening end 421 to face away from the electrical connection port 12 on the first plane M. That is, the blocking ends (first opening end 411 and third opening end 421) of the first passage 41 and the second passage 42 face away from the electrical connection port 12. This arrangement ensures that the core-pulling direction of the working passage 40 does not interfere with the demolding direction of the electrical connection port 12, thereby allowing the core-pulling of the working passage 40 and the punch of the electrical connection port 12 to operate simultaneously, improving production efficiency. See the injection molding process section below for details.

[0044] The conduction passage 43 is connected to the air inlet 5. Fluid enters the conduction passage 43 through the air inlet 5 and then enters the working passage 40 through the conduction passage 43. When the valve port 21 of the corresponding valve core assembly 2 is opened, the gas in the working passage 40 enters the valve chamber 11 and flows into the corresponding air spring.

[0045] This application embodiment also provides an injection molding process for a distribution valve box 100, used to manufacture the distribution valve box 100 described in any of the above embodiments, including: forming a valve cavity 11 and an internal passage 4 inside the housing 1 by integral injection molding, and forming an electrical connection port 12 by injection molding on one side of the housing 1; wherein, the mold action of the housing 1 causes at least one working passage 40 to form an open end and an inner sealing end; and during demolding, the punch of the working passage 40 is pulled out from the open end away from the inner sealing end. By forming the housing 1 and its internal valve cavity 11 and internal passage 4 by integral injection molding, the number of parts and connection gaps can be reduced, and the structural strength and sealing reliability can be improved; and each passage is core-pulled out from the open end along its extension direction, which facilitates the extraction of the core and demolding.

[0046] Specifically (corresponding to the embodiment where the first opening end 411 and the third opening end 421 face the electrical connection port 12), the working passage 40 includes a first passage 41 and a second passage 42. The first opening end 411 of the first passage 41 and the third opening end 421 of the second passage 42 face the electrical connection port 12 on one side of the first plane M, and the extension path of the electrical connection port 12 intersects the extension path of the working passage 40. During demolding, the core pulling of the working passage 40 moves before the punch of the electrical connection port 12.

[0047] For example, the openings of the first passage 41 and the second passage 42 face to the right, and the electrical connection port 12 is located on the right side of the housing 1 with its opening facing downwards. The electrical connection port 12 is located to the upper right of the opening of the working passage 40 (lateral passage). Therefore, the extension path of the electrical connection port 12 intersects with the extension paths of the first passage 41 and the second passage 42, that is, their virtual extension paths converge in space. During demolding, the core-pulling mechanism of the first passage 41 and the second passage 42 moves before the punch of the electrical connection port 12. This avoids interference between the punch of the electrical connection port 12 and the mold core of the first passage 41 and the second passage 42 when the punch moves outwards, ensuring smooth demolding.

[0048] In another injection molding process embodiment (corresponding to the embodiment where the first opening end 411 and the third opening end 421 are away from the electrical connection port 12), the working passage 40 includes a first passage 41 and a second passage 42. The first opening end 411 and the third opening end 421 are away from the electrical connection port 12 on one side of the first plane M. During demolding, the core pulling of the working passage 40 and the punch of the electrical connection port 12 move simultaneously.

[0049] In this way, since the core-pulling of the first passage 41 and the second passage 42 and the punch of the electrical connection port 12 no longer operate in two separate steps, but simultaneously, production efficiency can be significantly improved. Specifically, since one working passage 40 (e.g., the first passage 41) corresponds to the positions of three solenoid valves, and the other working passage 40 (e.g., the second passage 42) corresponds to the positions of two solenoid valves and one pressure sensor 8, the lengths of the first passage 41 and the second passage 42 are relatively long, and the core-pulling time required is relatively long. If the molds of the first passage 41, the second passage 42, and the electrical connection port 12 are demolded sequentially, the production time is also long. However, in this embodiment, the core-pulling of the first passage 41 and the second passage 42 is performed simultaneously with the punches of other parts (e.g., the electrical connection port 12), thereby shortening the demolding time and improving production efficiency.

[0050] It should be noted that the technical features in the above embodiments can be combined with each other without conflict, and the resulting technical solutions all fall within the protection scope of this application. For example, the scheme where the first passage 41 is a blind hole and the scheme where the first opening end 411 and the third opening end 421 face or are away from the electrical connection port 12 can be combined as needed; similarly, the scheme where the conductive passage 43 is a through hole can also be combined with different orientation schemes of the first opening end 411 and the third opening end 421.

Claims

1. A distribution valve box (100), characterized in that, The device includes a housing (1), at least two valve core assemblies (2) and a sealing element (3). The housing (1) is provided with a valve cavity (11) and an internal passage (4). At least a portion of the valve core assembly (2) is located in the valve cavity (11). The internal passage (4) is externally connected to the distribution valve box (100). The valve port (21) of the valve core assembly (2) is capable of connecting and closing the internal passage (4) and the valve cavity (11). The internal passage (4) includes at least two working passages (40). At least one of the working passages (40) has a length direction. In its length direction, one end is an open end, which is blocked by the sealing element (3), and the other end is an inner sealing end, which is blocked in the length direction by the wall of the housing.

2. The distribution valve box (100) according to claim 1, characterized in that, The wall of the internal passage (4) is integrally injection molded.

3. The distribution valve box (100) according to claim 1 or 2, characterized in that, The internal passage (4) includes a conduction passage (43) that conducts the working passage (40). The working passage (40) includes a second passage (42). The second passage is a through hole. The inner wall of the second passage (42) and the inner wall of the conduction passage (43) intersect at a second intersection (45). Along the extension direction of the second passage (42), the second intersection (45) is blocked by the inner wall of the conduction passage (43). The second passage (42) has a third opening end (421). The third opening end (421) and the second intersection (45) are arranged opposite to each other, and the third opening end (421) is blocked by the sealing member (3).

4. The distribution valve box according to claim 3, characterized in that, The working passage (40) includes a first passage (41), which is a blind hole. The blind hole has a first open end (411) and an inner sealed end (412). The first open end (411) is blocked by the sealing member (3). The inner wall of the passage (43) intersects the inner wall of the blind hole at the first intersection (44). Along the extension direction of the passage (43), the first intersection (44) is blocked by the inner wall of the blind hole. The passage (43) has a second opening end (431). The second opening end (431) and the first intersection (44) are arranged opposite to each other, and the second opening end (431) is blocked by the sealing member (3).

5. The distribution valve box (100) according to claim 3, characterized in that, The working path (40) includes a first path (41), which is a through hole; The inner wall of the first passage (41) and the inner wall of the connecting passage (43) are relative to the first intersection (44). The first passage (41) has a first opening end (411). Along the extension direction of the first passage (41), the first opening end (411) and the first intersection (44) are arranged opposite to each other. The first opening end (411) is blocked by the sealing member (3), and the first intersection (44) is blocked by the inner wall of the connecting passage (43). The conductive passage (43) has a second open end (431) and a fourth open end (432), the second open end (431) and the fourth open end (432) being blocked by the sealing member (3).

6. The distribution valve box (100) according to claim 4 or 5, characterized in that, The axes of the valve core assembly (2) are parallel to each other, and a first plane (M) is defined. The first plane (M) is parallel to the axis of the valve core assembly (2), and the first plane (M) passes through the wall corresponding to the conduction passage (43). The first opening end (411) and the third opening end (421) are located on the same side of the first plane (M).

7. The distribution valve box (100) according to claim 6, characterized in that, The housing (1) includes an electrical connection port (12), with the first opening end (411) and the third opening end (421) facing the electrical connection port (12) on one side of the first plane (M), and the extension path of the electrical connection port (12) intersects the extension paths of the first opening end (411) and the third opening end (421).

8. The distribution valve box (100) according to claim 6, characterized in that, The housing (1) includes an electrical connection port (12), with the first opening end (411) and the third opening end (421) facing away from the electrical connection port (12) on one side of the first plane (M).

9. An injection molding process for a distribution valve box (100) for manufacturing the distribution valve box (100) according to any one of claims 1 to 8, characterized in that, include: The valve cavity (11) and the internal passage (4) are formed inside the housing (1) by integral injection molding, and an electrical connection port (12) is formed on one side of the housing (1); wherein, the mold action of the housing (1) causes at least one of the working passages (40) to form the opening end and the inner sealing end; and during demolding, the punch of the working passage (40) is pulled out from the opening end away from the inner sealing end.

10. The injection molding process according to claim 9, characterized in that, The working passage (40) includes a first passage (41) and a second passage (42). The opening ends of the first passage (41) and the second passage (42) face the side of the housing (1) with the electrical connection port (12). The extension path of the electrical connection port (12) intersects the extension path of the working passage (40). During demolding, the core pulling of the working passage (40) moves before the punch of the electrical connection port (12).

11. The injection molding process according to claim 9, characterized in that, The working passage (40) includes a first passage (41) and a second passage (42). The opening ends of the first passage (41) and the second passage (42) are away from the side of the housing (1) with the electrical connection port (12). During demolding, the core pulling of the working passage (40) and the punch of the electrical connection port (12) move simultaneously.

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