Relay valve device and electronic braking system

Abstract

This application relates to a relay valve device comprising: a supply chamber passage (11) leading to a supply chamber (1); a high-pressure chamber passage (21) leading to a high-pressure chamber (2); a valve chamber (3); and a valve core (4) capable of relative displacement within the valve chamber (3), wherein the valve core (4) is configured to selectively establish a fluid connection between the supply chamber passage (11) and the high-pressure chamber passage (21) or the valve chamber (3) during relative displacement. This application also relates to a corresponding electronic braking system. Through certain embodiments of this application, compared to the prior art, the sealing structure between the internal components of the relay valve device can be simplified, saving the use of seals, thereby achieving a relay valve device and corresponding electronic braking system that are easy to process, structurally and cost-effectively designed, easy to manufacture and assemble, and have better sealing performance.

Description

Technical Field

[0001] This application relates to a relay valve device and a corresponding electronic braking system. Background Technology

[0002] In electronic braking systems, especially those used in vehicles and construction machinery such as cranes, the relay valve plays a crucial role. Its purpose is to precisely regulate the pressure of the working medium flowing from the high-pressure chamber to the brake chamber according to instructions from the central control module of the electronic braking system. Electronic braking systems can be classified into two types based on the working medium used: pneumatic and hydraulic. For vehicles, pneumatic electronic braking systems are typically used, meaning the working medium is compressed air.

[0003] Currently, electronic braking systems typically employ spool-type relay valves, particularly shut-off valves or ball valves. Existing relay valves require internal sealing structures between multiple mating components to ensure sealing performance. However, the corresponding contact areas of these mating components have complex structures, necessitating sealing at multiple locations. This requires specialized structural calculations and design experience. Therefore, the complex structure presents challenges to the manufacturing and assembly of the mating components and sealing structures. Furthermore, factors such as manufacturing processes, sealing materials, contact surface conditions, and pressure differentials increase the risk of sealing performance degradation during use, resulting in lower reliability. Utility Model Content

[0004] The purpose of this application is to provide an improved relay valve device to solve at least one of the above-mentioned and other unmentioned technical problems.

[0005] According to a first aspect of this application, a relay valve device is provided, the relay valve device comprising: a supply chamber passage leading to a supply chamber; a high-pressure chamber passage leading to a high-pressure chamber; a valve chamber; and a valve core capable of relative displacement within the valve chamber, wherein the valve core is configured to selectively establish a fluid connection between the supply chamber passage and the high-pressure chamber passage or the valve chamber during relative displacement.

[0006] According to an optional embodiment of this application, the valve core has a first shift position and a second shift position. In the first shift position, the valve core fluidly connects the supply chamber channel to the high-pressure chamber channel. In the second shift position, the valve core fluidly connects the supply chamber channel to the valve cavity. In a third shift position between the first shift position and the second shift position, the valve core disconnects the corresponding fluid connections between the supply chamber channel and the high-pressure chamber channel and the valve cavity.

[0007] According to an optional embodiment of this application, the valve core has a body and a first channel and a second channel disposed within the body, the first channel being configured to fluidly connect the supply chamber channel and the high-pressure chamber channel, and the second channel being configured to fluidly connect the supply chamber channel and the valve cavity, wherein the first channel and the second channel do not intersect each other.

[0008] According to an optional embodiment of this application, the valve core further has a third channel disposed within the body, wherein when the valve core is in the first displaced position, the third channel also fluidly connects the supply chamber channel and the high-pressure chamber channel.

[0009] According to an optional embodiment of this application, the valve core has a first groove and a second groove disposed on the circumferential outer surface of the body, and a first intermediate connecting section disposed in the body connecting the first groove and the second groove, wherein the first groove, the first intermediate connecting section and the second groove constitute the first channel.

[0010] According to an alternative embodiment of this application, the first channel and the third channel are partially integrated together.

[0011] According to an optional embodiment of this application, the second channel and the third channel do not intersect each other.

[0012] According to an optional embodiment of this application, the valve core has a first groove and a second groove disposed on the circumferential outer surface of the body, and a second intermediate connecting section disposed within the body connecting the first groove and the second groove, wherein the first groove, the second intermediate connecting section and the second groove constitute the third channel.

[0013] According to an alternative embodiment of this application, the first groove and the second groove extend along the circumferential direction of the body.

[0014] According to an optional embodiment of this application, the valve core has an outflow channel located within the body, a through hole extending through the body transversely to the outflow channel, and a third groove disposed on the circumferential outer surface of the body and connected to the through hole, wherein the third groove, the through hole, and the outflow channel constitute the second channel.

[0015] According to an optional embodiment of this application, the third groove is located between the first groove and the second groove.

[0016] According to an alternative embodiment of this application, the third groove extends along the circumferential direction of the body.

[0017] According to an optional embodiment of this application, the outer surface of the body and the inner surface of the valve cavity form a circumferential seal through a shape fit.

[0018] According to an optional embodiment of this application, the supply chamber channel and the high-pressure chamber channel are arranged along the displacement direction of the valve core.

[0019] According to an optional embodiment of this application, the relay valve device includes a base, a housing, and a valve cover, wherein the supply chamber and the high-pressure chamber are spaced apart from each other in an internal space enclosed by the base, the housing, and the valve cover.

[0020] According to an optional embodiment of this application, the relay valve device includes a partition wall that separates the supply chamber, the high-pressure chamber, and the valve cavity from each other, and the partition wall is provided with seals on both sides of the supply chamber channel and the high-pressure chamber channel along the displacement direction of the valve core.

[0021] According to a second aspect of this application, an electronic braking system is provided, the electronic braking system including any of the relay valve devices according to this application.

[0022] According to certain embodiments of this application, the sealing structure between the components in the relay valve device can be simplified, eliminating the need for pre-tightening of the sealing structure, saving on the use of seals, simplifying the processing and assembly process, and enabling the valve core to be formed in a single operation. The components are easy to process, with fewer assembly parts and better sealing performance, thus achieving structural and cost savings.

[0023] It is worth noting that the advantages and beneficial effects of this application are not limited to those mentioned above. Those skilled in the art can understand other advantages and beneficial effects not mentioned in this application through the following detailed embodiments and claims. Attached Figure Description

[0024] The principles, features, and advantages of this application will be better understood below with reference to the accompanying drawings. In the drawings:

[0025] Figure 1 A cross-sectional schematic diagram of a relay valve device according to an embodiment of the present application in a first state is shown;

[0026] Figure 2 A cross-sectional schematic diagram of a relay valve device according to an embodiment of this application in a second state is shown;

[0027] Figure 3 A cross-sectional schematic diagram of a relay valve device according to an embodiment of this application in a third state is shown;

[0028] Figure 4A cross-sectional perspective view of the valve core of a relay valve device according to an embodiment of this application is shown.

[0029] List of reference numerals

[0030] Supply Room

[0031] 11 Supply Room Corridor

[0032] 2 High-pressure chamber

[0033] 21 High-pressure chamber passage

[0034] 3 Valve chamber

[0035] 31 Opening

[0036] 4 Valve core

[0037] 41 Main Body

[0038] 42 First Channel

[0039] 43 Second Channel

[0040] 44 Third Channel

[0041] 451 First Groove

[0042] 452 Second Groove

[0043] 453 First intermediate connecting section

[0044] 454 Second intermediate connecting section

[0045] 46 Third Groove

[0046] 47 Outflow Channel

[0047] 48 through holes

[0048] 5 springs

[0049] 6 Valve seat

[0050] 7. Casing

[0051] 8 Valve cover

[0052] 9. Partition wall

[0053] 10. Seals Detailed Implementation

[0054] To make the technical problems, technical solutions, and beneficial technical effects to be solved by this application clearer, the application will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are only for explaining the principles of this application and are not intended to limit the scope of protection of this application. In the various drawings of this application, features with the same structure or function are represented by the same reference numerals. The drawings may not be drawn strictly to scale, but are exaggerated for clarity.

[0055] Figures 1-3 A cross-sectional schematic diagram of a relay valve device according to an embodiment of this application is shown in different states. Figure 1 A cross-sectional schematic diagram of the relay valve device is shown in the first state, in which the working medium, particularly compressed air, flows into the valve chamber 3; therefore, this first state can also be simply referred to as the inflow state. Figure 2 A cross-sectional schematic diagram of the relay valve device is shown in the second state, in which the working medium, particularly compressed air, flows out of the valve chamber 3; therefore, this second state can also be simply referred to as the outflow state. Figure 3 A cross-sectional schematic diagram of the relay valve device in the third state is shown. In this third state, the working medium, in particular compressed air, is held in the valve chamber 3 without flowing into or out of the valve chamber 3. Therefore, this third state can also be simply referred to as the holding state.

[0056] like Figures 1-3 As shown, the relay valve device according to an embodiment of this application may include: a supply chamber passage 11 leading to a supply chamber 1; a high-pressure chamber passage 21 leading to a high-pressure chamber 2; a valve chamber 3; and a valve core 4 capable of relative displacement within the valve chamber 3. Figure 1 As shown, the relay valve device may have an opening 31 that allows access from the outside of the relay valve device to the valve chamber 3. The valve core 4 may be supported on the valve seat 6 of the relay valve device by a spring 5. In this way, a drive component (e.g., valve stem or piston, not shown) or a working medium (e.g., compressed air) may be coupled to the valve core 4 through the opening 31, thereby controlling the relative displacement of the valve core 4 within the valve chamber 3 through cooperation with the spring.

[0057] Specifically, the valve core 4 can be configured to selectively establish a fluid connection between the supply chamber channel 11 and the high-pressure chamber channel 21 or the valve chamber 3 during relative displacement. Thus, fluid connections between the supply chamber channel 11 and the high-pressure chamber channel 21, or between the supply chamber channel 11 and the valve chamber 3, can be established at different specific displacement positions in a simple manner through the relative displacement of the valve core 4, and the fluid connections between the supply chamber channel 11 and the high-pressure chamber channel 21, and between the supply chamber channel 11 and the valve chamber 3, can be disconnected at other displacement positions. This can be achieved solely through the structural features of the valve core 4, without the need for various complex seals as required by existing technologies, and without the need for extensive seal design experience and calculations. Therefore, the relay valve device according to this application has advantages such as simple structure, ease of processing and assembly, and high reliability.

[0058] Taking compressed air as the working medium as an example, in a specific embodiment, such as Figure 1 As shown, in the first state of the relay valve device, the valve core 4 is in the first displaced position. At this time, the valve core 4 can fluidly connect the supply chamber channel 11 and the high-pressure chamber channel 21. Since the high-pressure chamber channel 21 leads to the high-pressure chamber 2 and the supply chamber channel 11 leads to the supply chamber 1, the high-pressure air in the high-pressure chamber 2 can flow into the supply chamber channel 11 through the high-pressure chamber channel 21 and the valve core 4 in sequence, and then into the supply chamber 1. This can be achieved by means of the pressure difference between the supply chamber 1 and the high-pressure chamber 2.

[0059] like Figure 2 As shown, in the second state of the relay valve device, the valve core 4 is located in the second displaced position. At this time, the valve core 4 can fluidly connect the supply chamber passage 11 to the valve chamber 3, so that air in the supply chamber 1 can flow into the valve core 4 through the supply chamber passage 11 and enter the valve chamber 3. This can be achieved by means of the pressure difference between the supply chamber 1 and the valve chamber 3.

[0060] When the valve core 4 is located in the third shift position between the first and second shift positions, that is, when the relay valve device is in the third state, such as Figure 3 As shown, the valve core 4 blocks the supply chamber channel 11 and the high pressure chamber channel 21 respectively, that is, disconnects the fluid connection between the supply chamber channel 11 and the high pressure chamber channel 21, and also disconnects the fluid connection between the supply chamber channel 11 and the valve chamber 3.

[0061] Figure 4 A cross-sectional perspective view of the valve core 4 of a relay valve device according to an embodiment of this application is shown. Figure 4As shown, the valve core 4 has a main body 41, which is generally cylindrical, and its outer surface forms a shape fit with the inner surface of the valve cavity 3, thereby forming a circumferential seal, particularly an airtight seal, at the mating side surfaces. Within the main body 41, a first channel 42 and a second channel 43 are provided. The first channel 42 is configured to fluidly connect the supply chamber channel 11 and the high-pressure chamber channel 21, and the second channel 43 is configured to fluidly connect the supply chamber channel 11 and the valve cavity 3. The first channel 42 and the second channel 43 do not intersect each other, thereby achieving independent directional fluid communication and establishing a one-to-one correspondence between the displacement position of the valve core 4 and the direction of fluid movement.

[0062] In a preferred embodiment, the valve core 4 has a first groove 451 and a second groove 452 disposed on the circumferential outer surface of the body 41, and a first intermediate connecting section 453 disposed within the body 41 connecting the first groove 451 and the second groove 452. The first groove 451, the first intermediate connecting section 453, and the second groove 452 constitute a first channel 42. Therefore, in the first state of the relay valve device, the working medium in the high-pressure chamber 2 flows to the supply chamber channel 11 sequentially via the second groove 452, the first intermediate connecting section 453, and the first groove 451 after leaving the high-pressure chamber channel 21. The first groove 451 and the second groove 452 preferably extend in the circumferential direction of the body 41, thereby forming an annular shape. The first intermediate connecting section 453 preferably extends in the axial direction of the body 41 (i.e., the displacement direction of the valve core 4). Thus, optimized fluid flow performance can be achieved.

[0063] Additionally, the valve core 4 may also have a third channel 44 disposed within the body 41, which, when the valve core 4 is in the first displaced position, also fluidly connects the supply chamber channel 11 to the high-pressure chamber channel 21. This enhances gas flow capacity. Furthermore, the first channel 42 and the third channel 44 may be partially integrated together to achieve a compact structure. Additionally or alternatively, similar to the first channel 42, the third channel 44 does not intersect with the second channel 43. In a particular preferred embodiment, as... Figure 4 As shown, the valve core 4 may have a second intermediate connecting section 454 disposed in the main body 41 to connect the first groove 451 and the second groove 452. The first groove 451, the second intermediate connecting section 454 and the second groove 452 constitute a third channel 44.

[0064] In the illustrated embodiment, the first intermediate connecting segment 453 and the second intermediate connecting segment 454 have different cross-sectional areas along the fluid flow direction, but in other embodiments not shown, they may have the same cross-sectional area along the fluid flow direction. Furthermore, the first intermediate connecting segment 453 and the second intermediate connecting segment 454 may be arranged symmetrically with respect to the central axis of the body 41.

[0065] In a preferred embodiment, such as Figure 4 As shown, the valve core 4 may have an outflow channel 47 located within the main body 41, a through hole 48 extending transversely through the outflow channel 47 and penetrating the main body 41, and a third groove 46 disposed on the circumferential outer surface of the main body 41 and connected to the through hole 48. The third groove 46, the through hole 48, and the outflow channel 47 constitute a second channel 43. Therefore, in the second state of the relay valve device, air in the supply chamber 1 flows into the valve chamber 3 sequentially through the third groove 46, the through hole 48, and the outflow channel 47 after leaving the supply chamber channel 11. Figure 4 As shown, the outflow channel 47 is preferably a longitudinally extending space located inside the main body 41, particularly in the central portion, and opens towards the bottom of the valve cavity 3 to form the outlet of the valve core 4. The through-hole 48 is located away from this outlet in the top portion of the space. Therefore, in the illustrated embodiment, air flowing out of the through-hole 48 can flow downwards in the outflow channel 47, exiting from the bottom of the valve core 4 and entering the valve cavity 3.

[0066] The third groove 46 may be located between the first groove 451 and the second groove 452. Additionally or alternatively, the third groove 46 may extend along the circumferential direction of the body 41. To ensure that neither the first channel 42 nor the third channel 44 intersects with the second channel 43, as... Figure 4 As shown, the depth of the third groove 46 recessed inward from the outer peripheral surface of the main body 41 can be less than the corresponding depths of the first groove 451 and the second groove 452. Thus, the difference in the recess depth of the grooves can achieve physical isolation between the corresponding channels in space.

[0067] Return to Figures 1-3 The supply chamber channel 11 and the high-pressure chamber channel 21 can be arranged along the displacement direction of the valve core 4. In the example shown in the figure, the valve core 4 is displaced relative to the valve cavity 3 in the vertical direction shown in the figure. The supply chamber 1 and the high-pressure chamber 2 are also arranged vertically, and the supply chamber 1 is located above the high-pressure chamber 2. This can facilitate the flow of the working medium between the chambers by utilizing the pressure difference formed by the gradient pressure between the high-pressure chamber 2, the supply chamber 1 and the valve cavity 3.

[0068] In some embodiments, at least one of the supply chamber 1 and the high-pressure chamber 2 may be located outside the relay valve device. In this case, fluid connections can be established between the external supply chamber 1 and the supply chamber channel 11, and between the external high-pressure chamber 2 and the high-pressure chamber channel 21, through corresponding pipelines.

[0069] However, preferably, in some embodiments, particularly as Figures 1-3 As shown, the supply chamber 1 and the high-pressure chamber 2 can be integrated into a relay valve device. Specifically, as... Figure 1As shown, the relay valve device may include a base 6, a housing 7, and a valve cover 8. These three components form an internal space, and the supply chamber 1 and the high-pressure chamber 2 can be formed separately within this internal space. Thus, an integrated relay valve device is realized, in which the supply chamber 1, the high-pressure chamber 2, and the valve chamber 3 are integrated together.

[0070] Furthermore, in some embodiments, the relay valve device may include a partition wall 9 that spaces the supply chamber 1, the high-pressure chamber 2, and the valve chamber 3 apart from each other. In the specific embodiment shown, the valve chamber 3 is located in the central portion of the relay valve device and is formed as a cylindrical chamber, while the supply chamber 1 and the high-pressure chamber 2 are each formed as annular chambers around the valve chamber 3. The partition wall 9 includes an annular transverse wall that spaces the vertically arranged supply chamber 1 and high-pressure chamber 2 apart, and a cylindrical longitudinal wall that spaces the valve chamber 3 apart from the supply chamber 1 and high-pressure chamber 2 outside it. Thus, physical isolation between the chambers can be achieved by the partition wall 9, especially an integrated partition wall.

[0071] Preferably, to improve sealing performance, especially airtightness, the partition wall 9 may be provided with sealing elements 10 on both sides of the supply chamber channel 11 and the high-pressure chamber channel 21 along the displacement direction of the valve core 4. The sealing element 10 may be an O-ring embedded in the partition wall 9. That is, as shown in the figure, the supply chamber channel 11 and the high-pressure chamber channel 21 may be formed within the partition wall 9 and extend laterally from the supply chamber 1 and the high-pressure chamber 2 to the valve cavity 3 respectively. Sealing elements 10 are provided on the corresponding upper and lower sides of the supply chamber channel 11 and the high-pressure chamber channel 21. The sealing elements 10 provide good sealing performance at the corresponding channels where gas transmission occurs between the chambers, as these channels are key locations for ensuring sealing performance.

[0072] Embodiments of this application also relate to an electronic braking system (EBS) including the aforementioned relay valve device, which can be used, in particular, for vehicles, such as various types of vehicles, or for construction machinery.

[0073] It should be understood that the advantages and beneficial effects described above in conjunction with the relay valve device according to this application will also apply to the electronic braking system according to this application.

[0074] It is worth noting that in this document, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance, nor should they be construed as implicitly specifying the number of technical features indicated. Features specified as "first," "second," or "third" may explicitly or implicitly indicate that at least one of those features is included.

[0075] It should also be noted that in the description of the embodiments, the use of terms such as "upper," "lower," "top," "bottom," "inner," and "outer" to indicate orientation or positional relationship in order to illustrate the positional relationship of the constituent elements with reference to the accompanying drawings is only for the convenience of describing this specification and simplifying the description, and is not intended to indicate or imply that the device or element referred to has a specific orientation, or is constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0076] Without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described herein, as well as the features of those different embodiments or examples. Various substitutions, modifications, and alterations can be conceived without departing from the spirit and scope of this application.

Claims

1. A relay valve apparatus characterized by comprising: The relay valve device includes: Supply room passage (11) leading to supply room (1); High-pressure chamber passage (21) leading to high-pressure chamber (2); Valve cavity (3); and A valve core (4) that can be relatively displaced within the valve cavity (3). The valve core (4) is configured to selectively establish a fluid connection between the supply chamber channel (11) and the high pressure chamber channel (21) or the valve chamber (3) during relative displacement.

2. The relay valve device according to claim 1, characterized in that, The valve core (4) has a first displacement position and a second displacement position. In the first displacement position, the valve core (4) fluidly connects the supply chamber channel (11) with the high pressure chamber channel (21). In the second displacement position, the valve core (4) fluidly connects the supply chamber channel (11) with the valve cavity (3). In a third displacement position between the first displacement position and the second displacement position, the valve core (4) disconnects the corresponding fluid connections between the supply chamber channel (11) and the high pressure chamber channel (21) and the valve cavity (3).

3. The relay valve device according to claim 2, characterized in that, The valve core (4) has a main body (41) and a first channel (42) and a second channel (43) disposed in the main body (41). The first channel (42) is configured to fluidly connect the supply chamber channel (11) and the high pressure chamber channel (21). The second channel (43) is configured to fluidly connect the supply chamber channel (11) and the valve cavity (3). The first channel (42) and the second channel (43) do not intersect each other.

4. The relay valve device according to claim 3, characterized in that, The valve core (4) also has a third channel (44) disposed within the body (41), which, when the valve core (4) is in the first displaced position, also fluidly connects the supply chamber channel (11) to the high-pressure chamber channel (21); and / or The valve core (4) has a first groove (451) and a second groove (452) disposed on the circumferential outer surface of the body (41) and a first intermediate connecting section (453) disposed in the body (41) to connect the first groove (451) and the second groove (452). The first groove (451), the first intermediate connecting section (453) and the second groove (452) constitute the first channel (42).

5. The relay valve device according to claim 4, characterized in that, The first channel (42) and the third channel (44) are partially integrated together; and / or The second channel (43) and the third channel (44) do not intersect each other; and / or The valve core (4) has a first groove (451) and a second groove (452) disposed on the circumferential outer surface of the body (41), and a second intermediate connecting section (454) disposed in the body (41) connecting the first groove (451) and the second groove (452). The first groove (451), the second intermediate connecting section (454) and the second groove (452) constitute the third channel (44); and / or The first groove (451) and the second groove (452) extend along the circumferential direction of the body (41).

6. The relay valve device according to claim 4 or 5, characterized in that, The valve core (4) has an outflow channel (47) located in the body (41), a through hole (48) that is transverse to the outflow channel (47) and penetrates the body (41), and a third groove (46) provided on the circumferential outer surface of the body (41) and connected to the through hole (48). The third groove (46), the through hole (48) and the outflow channel (47) constitute the second channel (43).

7. The relay valve device according to claim 6, characterized in that, The third groove (46) is located between the first groove (451) and the second groove (452); and / or The third groove (46) extends along the circumferential direction of the body (41); and / or The outer surface of the main body (41) and the inner surface of the valve cavity (3) form a circumferential seal through shape matching.

8. The relay valve device according to any one of claims 1-5 and 7, characterized in that, The supply chamber channel (11) and the high-pressure chamber channel (21) are arranged along the displacement direction of the valve core (4); and / or The relay valve device includes a base (6), a housing (7) and a valve cover (8), wherein the supply chamber (1) and the high-pressure chamber (2) are formed spaced apart from each other in the internal space enclosed by the base (6), the housing (7) and the valve cover (8).

9. The relay valve device according to claim 8, characterized in that, The relay valve device includes a partition wall (9) that separates the supply chamber (1), the high pressure chamber (2) and the valve chamber (3) from each other. The partition wall (9) is provided with seals (10) on both sides of the supply chamber channel (11) and the high pressure chamber channel (21) along the displacement direction of the valve core (4).

10. An electronic braking system characterized by, The electronic braking system includes a relay valve device according to any one of claims 1-9.

Images