Electro-hydrostatic brake valve and pressurizing oil cup for electro-hydrostatic brake valve

Abstract

The utility model provides an electro-hydrostatic brake valve and a pressurizing oil cup for the electro-hydrostatic brake valve, and relates to the technical field of brake system design. The pressurizing oil cup comprises a balloon seat, an elastic balloon and a self-sealing connector, the balloon seat comprises a first open end and a second open end, and a flange is arranged on the periphery of the first open end; the elastic balloon is used for bearing oil; a concave part is arranged on the elastic balloon, an opening is formed in the bottom of the concave part, and the concave part sleeves the periphery of the flange; the self-sealing connector comprises a plugging barrel, a core body and a spring, the plugging barrel is arranged in the balloon seat, the core body comprises a protruding part and a spring seat, the spring seat is located on the side, close to the elastic balloon, of the protruding part, the spring is arranged in the spring seat, one end of the spring abuts against the inner wall of the first open end, and an oil through hole is formed in the bottom of the spring seat; a part of the protruding part protrudes out of the plugging barrel, the protruding part is in sealing fit with the inner wall of the plugging barrel, and the sealing state of the protruding part and the plugging barrel can be relieved by pressing the protruding part so that oil can flow out through the oil through hole.

Description

Technical Field

[0001] This disclosure relates to the field of brake system design technology, and more specifically, to an electro-hydraulic brake valve and a pressure-boosting oil cup for the electro-hydraulic brake valve. Background Technology

[0002] Electro-hydraulic brake valves are widely used in the wheel braking systems of various aircraft, especially small aircraft and drones. With normal wear of the brake discs and minor leaks in downstream pipelines, the amount of hydraulic oil required to generate braking pressure gradually increases with each use. However, the amount of hydraulic oil initially stored in the piston chamber is limited and must be replenished promptly; otherwise, the hydraulic oil level in the piston chamber will gradually decrease, preventing the proper establishment of braking pressure. Therefore, an oil compensation device needs to be installed on the electro-hydraulic brake valve. However, existing oil compensation devices are prone to oil leakage, which can pollute the surrounding environment.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0004] This disclosure provides an electro-hydraulic brake valve and a pressure-boosting oil cup for the electro-hydraulic brake valve, which can prevent oil leakage and avoid pollution to the surrounding environment.

[0005] According to one aspect of this disclosure, a booster cup for an electro-hydraulic brake valve is provided, comprising:

[0006] The balloon seat includes a through first open end and a second open end, and the outer periphery of the first open end is provided with a flange that protrudes radially outward;

[0007] An elastic balloon is used to carry oil; the elastic balloon has a recess, the bottom of the recess has an opening, the recess is fitted around the outer periphery of the flange, and the opening communicates with the first open end.

[0008] The self-sealing connector includes a sealing cylinder, a core, and a spring. The sealing cylinder is disposed within the balloon seat, and the core is disposed within the sealing cylinder. The core includes a protrusion and a spring seat connected to each other. The spring seat is located on the side of the protrusion closer to the elastic balloon. The spring is disposed within the spring seat, and the end of the spring away from the bottom of the spring seat abuts against the inner wall of the first open end. The bottom of the spring seat is provided with an oil passage hole. A portion of the protrusion protrudes beyond the sealing cylinder, and the outer wall of the protrusion is sealed to the inner wall of the sealing cylinder. Pressing the portion of the protrusion that protrudes beyond the sealing cylinder releases the seal between the protrusion and the sealing cylinder, allowing the oil to flow out through the oil passage hole.

[0009] In one exemplary embodiment of this disclosure, the pressurizing oil cup further includes:

[0010] The shell is fitted around the outer periphery of the elastic balloon and connected to the outer wall of the balloon seat; the shell is provided with a vent hole.

[0011] In an exemplary embodiment of this disclosure, the inner wall of the sealing tube at the end away from the elastic balloon is a conical surface, and the radial dimension of the conical surface gradually decreases from the side closer to the elastic balloon to the side farther away from the elastic balloon;

[0012] The surface of the portion of the protrusion away from the spring seat is a conical surface, and the conical surface of the protrusion is provided with an annular groove that is recessed radially inward.

[0013] The pressurizing oil cup also includes:

[0014] A sealing ring is disposed within the annular groove; the conical surface in the sealing cylinder abuts against the conical surface on the protrusion, and the sealing ring is in sealing fit with the conical surface in the sealing cylinder; and when the area protruding from the protrusion outside the sealing cylinder is pressed, the sealing state between the sealing ring and the conical surface in the sealing cylinder can be released.

[0015] In one exemplary embodiment of this disclosure, the outer periphery of the sealing cylinder is provided with an external thread, the inner periphery of the balloon seat is provided with an internal thread, and the sealing cylinder and the balloon seat are connected by the external thread and the internal thread.

[0016] In an exemplary embodiment of this disclosure, the balloon seat has a shoulder at the end near the elastic balloon and a snap-fit ​​groove on the side of the shoulder away from the elastic balloon and adjacent to the shoulder. The snap-fit ​​groove surrounds the outer wall of the balloon seat around its outer periphery.

[0017] The opening of the housing is annular and is located on the side of the shoulder away from the elastic balloon. The opening abuts against the shoulder, and the shoulder is located inside the housing.

[0018] The outer periphery of the balloon seat is provided with external threads, and the pressure cup also includes a round nut. The round nut is sleeved on the outer periphery of the balloon seat and is connected to the balloon seat by threads. Rotating the round nut can fasten the opening between the shoulder and the round nut.

[0019] In one exemplary embodiment of this disclosure, the pressurizing oil cup further includes:

[0020] A rubber ring is located between the opening and the balloon seat, and is fitted inside the snap-fit ​​groove.

[0021] In one exemplary embodiment of this disclosure, the balloon seat is further provided with a boss inside, the boss surrounding the inner wall of the balloon seat; the sealing cylinder is further provided with a groove around the outer periphery of the end away from the elastic balloon, the groove surrounding the outer periphery of the sealing cylinder;

[0022] The pressurizing oil cup also includes:

[0023] A rubber pad is fitted into the slot and abuts against the surface of the boss.

[0024] In one exemplary embodiment of this disclosure, the elastic balloon is made of rubber, rubber-plastic composite, or elastic plastic.

[0025] According to one aspect of this disclosure, an electro-hydraulic brake valve is provided, comprising the pressure-boosting oil cup for an electro-hydraulic brake valve as described in any of the preceding claims.

[0026] In one exemplary embodiment of this disclosure, it further includes:

[0027] The valve body is threadedly connected to the outer periphery of the balloon seat. The valve body is provided with a top opening portion, which can press the area of ​​the protrusion that protrudes beyond the sealing cylinder to release the sealing state between the protrusion and the sealing cylinder, and allow the oil to flow out through the oil passage into the piston chamber of the valve body.

[0028] The electro-hydraulic brake valve and the pressure-boosting cup used in this disclosure are in a sealed state under normal conditions. When the end of the protrusion is pressed, the seal of the pressure-boosting cup is released, allowing oil to flow out under the elastic force of the elastic bladder, thus achieving oil supply. In this process, because the bladder used to carry the oil is an elastic bladder, it expands more significantly after being filled with oil, resulting in a larger effective capacity. Simultaneously, the pressure-boosting cup of this disclosure primarily relies on the elastic pressure of the elastic bladder to supply oil to the piston chamber, allowing for greater freedom in the installation position and angle of the pressure-boosting cup. Regardless of the installation angle of the electro-hydraulic brake valve, the pressure-boosting cup can stably provide the required hydraulic pressure, greatly expanding the installation range and application scenarios of the braking system and solving the installation limitations of electro-hydraulic brake valves. The elastic bladder does not have any small holes communicating with the atmosphere, preventing oil leakage and environmental pollution.

[0029] Furthermore, the pressure-boosting cup is filled with hydraulic oil during operation, and the elastic properties of the balloon effectively absorb and buffer external vibrations, preventing foaming of the hydraulic oil due to vibration. This not only maintains the purity of the hydraulic oil but also prevents gas from being drawn into the piston chamber of the electro-hydraulic brake valve, thus ensuring the stability and reliability of the braking system. When not in operation, the pressure-boosting cup can be completely sealed, allowing for independent filling, venting, and draining operations without disassembling the entire brake system. This simplifies the maintenance process, improves efficiency, and reduces costs, making the use and maintenance of the electro-hydraulic brake valve more convenient.

[0030] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0032] Figure 1 This is a schematic diagram of a pressure booster cup in related technologies.

[0033] Figure 2 This is a schematic diagram of the pressure booster cup of the electro-hydraulic brake valve in an unfilled state according to an embodiment of this disclosure.

[0034] Figure 3 This is a schematic diagram of the pressurized oil cup of the electro-hydraulic brake valve in an embodiment of this disclosure, showing the oil level in the cup.

[0035] In the diagram: 10, piston chamber; 20, oil cup; 30, small hole; 1, bladder seat; 11, flange; 12, shoulder; 13, boss; 2, elastic bladder; 21, opening; 3, self-sealing joint; 31, sealing cylinder; 32, core; 321, spring seat; 322, protrusion; 33, spring; 4, housing; 41, vent hole; 42, opening; 5, sealing ring; 6, round nut; 7, rubber ring; 8, rubber pad. Detailed Implementation

[0036] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0037] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0038] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc. The terms “first” and “second” are used only as markers and are not a limitation on the number of objects.

[0039] An electro-hydraulic brake valve is an electro-hydraulic actuator that provides hydraulic pressure. Its working principle involves using an electric telescopic mechanism to push a piston, compressing the hydraulic oil stored in the piston chamber to provide the hydraulic pressure required for braking. Utilizing the incompressible nature of hydraulic oil, the piston chamber of the electro-hydraulic brake valve only needs to hold a very small amount of hydraulic oil to output a large pressure. Because it is electrically driven and does not require an external hydraulic power source, it features flexible layout and high reliability.

[0040] Electro-hydraulic brake valves are widely used in the wheel braking systems of various aircraft, especially small aircraft and drones without hydraulic systems. With normal wear of the brake discs and minor leaks in downstream pipelines, the amount of hydraulic oil required for the electro-hydraulic brake valve to generate braking pressure gradually increases with each use. However, the amount of hydraulic oil initially stored in the piston chamber is limited and must be replenished promptly; otherwise, the hydraulic oil in the piston chamber will gradually decrease, resulting in an inability to build up braking pressure. Therefore, an oil compensation device must be installed on the electro-hydraulic brake valve.

[0041] like Figure 1 As shown, the existing electro-hydraulic brake valve uses a semi-open oil cup 20. The upper end of the oil cup 20 is connected to the atmosphere through a small vent hole 30, and the lower end is installed on the upper part of the piston chamber 10. The oil is supplied to the piston chamber 10 by the gravity of the oil itself.

[0042] However, since the oil cup 20 relies on gravity for oil supply, it must be installed directly above the piston chamber 10. This necessitates that the electro-hydraulic brake valve be installed at an angle that ensures the oil cup 20 faces upwards, significantly limiting its installation capabilities. This is especially true on small aircraft where space constraints make finding a suitable installation location for the electro-hydraulic brake valve extremely difficult. Furthermore, changes in aircraft attitude and vibrations cause the hydraulic oil in the oil cup 20 to slosh, leading to leakage from the small hole 30 at the top of the cup, causing contamination of the surrounding area. If the oil level in the cup 20 is low at this time, the sloshing oil will mix with air, generating a large amount of foam. This foam-laden oil entering the piston chamber 10 results in air in the oil within the chamber, preventing proper brake pressure build-up.

[0043] Based on this, this disclosure provides a booster oil cup for an electro-hydraulic brake valve, such as... Figure 2 and Figure 3 As shown, the pressurizing oil cup may include a balloon seat 1, an elastic balloon 2, and a self-sealing connector 3, wherein:

[0044] The balloon seat 1 includes a through first open end and a second open end, and the outer periphery of the first open end is provided with a flange 11 that protrudes outward in a radial direction;

[0045] The elastic balloon 2 is used to carry oil; the elastic balloon 2 is provided with a recess, and the bottom of the recess is provided with an opening 21. The recess is fitted around the outer periphery of the flange 11, and the opening 21 is connected to the first open end.

[0046] The self-sealing connector 3 includes a sealing cylinder 31, a core 32, and a spring 33. The sealing cylinder 31 is located inside the balloon seat 1. The core 32 includes a protrusion 322 and a spring seat 321 connected to each other. The spring seat 321 is located on the side of the protrusion 322 closer to the elastic balloon 2. The spring 33 is located inside the spring seat 321, and the end of the spring 33 away from the bottom of the spring seat 321 abuts against the inner wall of the first open end. The bottom of the spring seat 321 is provided with an oil passage hole. A portion of the protrusion 322 protrudes beyond the sealing cylinder 31, and the outer wall of the protrusion 322 is sealed to the inner wall of the sealing cylinder 31. Pressing the portion of the protrusion 322 that protrudes beyond the sealing cylinder 31 can release the seal between the protrusion 322 and the sealing cylinder 31, allowing the oil to flow out through the oil passage hole.

[0047] The pressure-boosting oil cup for an electro-hydraulic brake valve disclosed herein is normally sealed. When the end of the protrusion 322 is pressed, the seal of the pressure-boosting oil cup is released, allowing oil to flow out under the elastic force of the elastic bladder 2, thus achieving oil supply. In this process, because the bladder used to hold the oil is an elastic bladder 2, it expands more significantly after being filled with oil, resulting in a larger effective capacity. Simultaneously, the pressure-boosting oil cup of this disclosure primarily relies on the elastic pressure of the elastic bladder 2 to supply oil to the piston chamber, allowing for greater freedom in the installation position and angle of the pressure-boosting oil cup. Regardless of the angle at which the electro-hydraulic brake valve is installed, the pressure-boosting oil cup can stably provide the required hydraulic pressure, greatly expanding the installation range and application scenarios of the braking system and solving the installation limitations of electro-hydraulic brake valves. The elastic bladder 2 does not have any small holes communicating with the atmosphere, preventing oil leakage and avoiding environmental pollution.

[0048] Furthermore, the pressure-boosting cup is filled with hydraulic oil during operation, and the elastic properties of the balloon effectively absorb and buffer external vibrations, preventing foaming of the hydraulic oil due to vibration. This not only maintains the purity of the hydraulic oil but also prevents gas from being drawn into the piston chamber of the electro-hydraulic brake valve, thus ensuring the stability and reliability of the braking system. When not in operation, the pressure-boosting cup can be completely sealed, allowing for independent filling, venting, and draining operations without disassembling the entire brake system. This simplifies the maintenance process, improves efficiency, and reduces costs, making the use and maintenance of the electro-hydraulic brake valve more convenient.

[0049] The following is a detailed description of the components and specific details of the booster cup for the electro-hydraulic brake valve disclosed herein:

[0050] Please continue reading Figure 2 and Figure 3 As shown, the balloon seat 1 can be cylindrical, for example, it can be a circular cylinder. The material of the balloon seat 1 can be a rigid material, for example, it can be metal, alloy, stainless steel or hard plastic, etc. The balloon seat 1 can include a through first open end and a second open end. The outer periphery of the first open end is provided with a flange 11 that protrudes radially outward. A retaining ring (not shown in the figure) can be provided below the flange 11. The retaining ring can be groove-shaped and distributed adjacent to the flange 11. The retaining ring can surround the outer wall of the balloon seat 1. The flange 11 and the balloon seat 1 can be an integral structure.

[0051] The elastic balloon 2 can be used to carry hydraulic fluid, which may be hydraulic oil. The material of the elastic balloon 2 can be a material with good extensibility to provide a suitable pressure value (e.g., a pressure value of several hundred Pascals to several thousand Pascals). For example, the material of the elastic balloon 2 can be rubber, rubber-plastic composite, or elastic plastic. For example, the material of the elastic balloon 2 can be oil-resistant silicone rubber with an elongation of up to 400%, which can be manufactured in a smaller size and allows for greater expansion of the elastic balloon 2 after being filled with hydraulic fluid, thus achieving a greater effective capacity.

[0052] The elastic balloon 2 can be fitted around the outer periphery of the flange 11 at the first open end of the balloon seat 1, at which time the other parts of the balloon seat 1 are located outside the elastic balloon 2. For example, the elastic balloon 2 may have a recess (not shown in the figure), the shape and size of which match the shape and size of the balloon seat 1, so that the recess can be tightly fitted around the outer periphery of the flange 11 and extend into the retaining ring below the flange 11. In some embodiments of this disclosure, the recess can be sealed with the flange 11 to prevent oil in the balloon seat 1 from leaking through the connection between the recess and the flange 11.

[0053] The bottom of the recess is provided with an opening 21. The shape of the opening 21 can be circular, elliptical, rectangular, polygonal, or irregular. No special limitation is made on the shape of the opening 21. The opening 21 can be distributed directly opposite the first open end of the balloon seat 1. The elastic balloon 2 and the first open end of the balloon seat 1 can be connected through the opening 21, thereby ensuring that the oil can flow freely between the elastic balloon 2 and the balloon seat 1.

[0054] Please continue reading Figure 2 and Figure 3 As shown, the self-sealing connector 3 may include a sealing cylinder 31, a core 32, and a spring 33. The sealing cylinder 31, as the main outer shell of the self-sealing connector 3, is securely mounted inside the balloon seat 1. The balloon seat 1 provides a stable support environment for the sealing cylinder 31, ensuring that it does not shift during operation. For example, the sealing cylinder 31 may be a cylindrical or near-cylindrical hollow tubular body. The material of the sealing cylinder 31 may be a high-strength, corrosion-resistant metallic material (e.g., stainless steel, titanium alloy, etc.) or a high-temperature resistant, wear-resistant non-metallic material (e.g., ceramic, special plastics, etc.). The internal space of the sealing cylinder 31 is used to accommodate the core 32 and the spring 33.

[0055] In one exemplary embodiment of this disclosure, the occlusion cylinder 31 is detachably connected to the balloon seat 1. For example, the inner circumference of the portion of the balloon seat 1 near the elastic balloon 2 is provided with an internal thread, and the outer circumference of the occlusion cylinder 31 near the end of the elastic balloon 2 is provided with an external thread. The occlusion cylinder 31 can be connected to the balloon seat 1 through the external thread and the internal thread.

[0056] In one exemplary embodiment of this disclosure, the balloon seat 1 is further provided with a boss 13 inside. The boss 13 can be located inside the second open end of the balloon seat 1, and the platform of the boss 13 can face the opening of the second open end. The boss 13 can surround the inner wall of the balloon seat 1. At the same time, the outer periphery of the end of the sealing cylinder 31 away from the elastic balloon 2 is also provided with a groove (not shown in the figure), which can surround the outer periphery of the sealing cylinder 31. The groove and the sealing cylinder 31 can be an integral structure, or the groove can be connected to the outer periphery of the sealing cylinder 31 by welding. After the sealing cylinder 31 is connected to the inner wall of the balloon seat 1 by threads, the top of the groove can abut against the platform of the boss 13. The pressurizing oil cup of this disclosure can also include a rubber pad 8, which can be snapped into the groove and abut against the surface of the boss 13. The sealing connection between the sealing cylinder 31 and the balloon seat 1 can be achieved through the design of the groove and the rubber pad 8.

[0057] Please continue reading Figure 2 and Figure 3 As shown, the core 32 can be disposed within the sealing cylinder 31. The core 32 may include an interconnected protrusion 322 and a spring seat 321, and the spring seat 321 and the protrusion 322 may be distributed circumferentially along the sealing cylinder 31. The spring seat 321 is located on the side of the protrusion 322 closest to the elastic balloon 2. Both the protrusion 322 and the spring seat 321 can be made of a rigid material, and they can be an integral structure, formed simultaneously through an integral molding process. The spring seat 321 may be groove-shaped, with its opening facing the direction of the elastic balloon 2. The protrusion 322 is connected to the bottom of the groove-shaped spring seat 321. The shape of the protrusion 322 may be designed as cylindrical, conical, or other shapes according to actual needs. A portion of the protrusion 322 (e.g., the end of the protrusion 322 away from the spring seat 321) protrudes beyond the sealing cylinder 31.

[0058] Please continue reading Figure 2 and Figure 3 As shown, spring 33 can be disposed within spring seat 321, and the end of spring 33 away from the bottom of spring seat 321 abuts against the inner wall of the first open end. For example, the size of the inner wall of the first open end is smaller than the size of the inner wall of the second open end, and the size of the inner wall of the first open end is smaller than the diameter of spring 33. After spring 33 is placed within spring seat 321, the end of spring 33 away from the bottom of spring seat 321 abuts against the inner wall of the first open end, that is, spring 33 is confined between the inner wall of the first open end and spring seat 321.

[0059] In one exemplary embodiment of this disclosure, the bottom of the spring seat 321 is provided with a through hole (not shown in the figure). The through hole can be a through hole, that is, the through hole can penetrate the spring seat 321 through the thickness direction of the bottom of the spring seat 321. The through hole can be a circular hole, an elliptical hole, a rectangular hole, a polygonal hole, or an irregularly shaped hole structure. The shape of the through hole is not specifically limited here.

[0060] In some embodiments of this disclosure, the outer wall of the protrusion 322 is tightly fitted and sealed to the inner wall of the sealing cylinder 31, ensuring that the self-sealing joint 3 can maintain a tight closed state when not subjected to external force, which can effectively prevent oil leakage.

[0061] For example, the inner wall of the end of the sealing cylinder 31 furthest from the elastic balloon 2 can be a conical surface. This conical design not only enhances the stability of the structure but also provides a good contact surface for the sealing fit. The radial dimension of the conical surface gradually decreases from the side closer to the elastic balloon 2 to the side farther away from the elastic balloon 2, forming a gradually contracting channel, which helps to enhance the tightness of the seal. At the same time, the surface of the portion of the protrusion 322 furthest from the spring seat 321 can also be a conical surface. This conical surface matches the conical inner wall of the sealing cylinder 31. The fit between the conical surfaces not only increases the contact area between the sealing cylinder 31 and the protrusion 322 but also enhances the reliability of the seal through the self-locking characteristic of the conical surface.

[0062] In one exemplary embodiment of this disclosure, to further enhance the sealing effect, the conical surface of the protrusion 322 is further provided with a radially inwardly recessed annular groove (not shown in the figure). The pressurized oil cup also includes a sealing ring 5, which can be disposed in the annular groove on the protrusion 322. The material of the sealing ring 5 can be a material with high elasticity, wear resistance, and oil resistance to ensure stable sealing performance during long-term use. The sealing ring 5 fits tightly against the conical surface in the sealing cylinder 31, forming a second sealing line of defense, which greatly enhances the sealing reliability of the self-sealing joint 3.

[0063] Under normal conditions (i.e., without external force), the sealing cylinder 31 and the core 32 work together with the compressible spring 33. Under the force of the spring 33, the conical surface in the sealing cylinder 31 and the conical surface on the protrusion 322 are tightly abutted together. At the same time, the sealing ring 5 and the conical surface in the sealing cylinder 31 form an effective sealing fit, ensuring that the oil will not leak through the self-sealing joint 3. However, when it is necessary to release the seal, simply press the area of ​​the protrusion 322 that protrudes beyond the sealing cylinder 31, thereby causing the protrusion 322 to shift relative to the sealing cylinder 31, thus releasing the sealing contact between the sealing ring 5 and the conical surface of the sealing cylinder 31, allowing the oil to flow out through the oil passage at the bottom of the spring seat 321.

[0064] In one exemplary embodiment of this disclosure, please continue to refer to Figure 2 and Figure 3 As shown, the pressurizing oil cup of this disclosure may further include a housing 4, which can be sleeved on the outer periphery of the elastic balloon 2 and connected to the outer wall of the balloon seat 1. The space inside the housing 4 can be larger than the space of the elastic balloon 2 when it is not filled with oil. For example, the volume inside the housing 4 can be 1.5 to 4 times the volume of the elastic balloon 2 when it is not filled with oil. The housing 4 can limit the over-inflation of the elastic balloon 2; for example, after the elastic balloon 2 is filled, the elastic balloon 2 will be tightly attached to the inner wall of the housing 4, preventing hydraulic oil from being further injected, thereby protecting the elastic balloon 2 from being damaged by over-inflation. At the same time, the housing 4 can provide support for the elastic balloon 2, because the elastic balloon 2 is an elastic material and will swing under vibration, which may cause the elastic balloon 2 to rupture in severe cases; while the inner wall of the housing 4 is tightly attached to the elastic balloon 2, the elastic balloon 2 can be fixed.

[0065] In one exemplary embodiment of this disclosure, please continue to refer to Figure 2 and Figure 3 As shown, the housing 4 may be provided with a vent 41. The design of the vent 41 allows the inner cavity of the housing 4 to maintain free communication with the external atmosphere, which helps to balance the pressure inside and outside the housing 4 and avoid deformation or damage to the housing 4 due to pressure differences. It also facilitates the normal operation of the oil system. The vent 41 at the top of the housing 4 allows the balloon to expand and contract freely inside the housing 4 without being hindered by air compression.

[0066] In some embodiments of this disclosure, the shell 4 may be made of a transparent material so that operators can observe the oil filling status of the elastic balloon 2 from the outside and know the amount of oil stored inside the elastic balloon 2, providing an intuitive basis for system maintenance and upkeep.

[0067] In one exemplary embodiment of this disclosure, a shoulder 12 is provided at the end of the balloon seat 1 near the elastic balloon 2. The shoulder 12 provides stable support and positioning for the installation of the housing 4. A snap-fit ​​groove (not shown in the figure) is adjacent to the side of the shoulder 12 away from the elastic balloon 2. The snap-fit ​​groove can surround the outer wall of the balloon seat 1 around its periphery, thereby providing space for the rubber ring 7 to be installed later. It should be noted that the shoulder 12 and the balloon seat 1 can be an integral structure.

[0068] The opening 42 in the housing 4 that will connect with the outer periphery of the balloon seat 1 can be annular. The opening 42 can be an annular ring and can be located on the side of the shoulder 12 away from the elastic balloon 2, and closely abut against the shoulder 12. At this time, the shoulder 12 is located inside the housing 4. This design allows the housing 4 to fully cover the elastic balloon 2 and the relevant parts of the balloon seat 1 (such as the flange 11, the retaining ring and the shoulder 12), providing all-round protection for the hydraulic system.

[0069] In one exemplary embodiment of this disclosure, the outer periphery of the balloon seat 1 is provided with external threads (for example, the lower part of the shoulder 12 is provided with external threads). At the same time, the pressure ring may also include a round nut 6, which can be sleeved on the outer periphery of the balloon seat 1 and is connected to the balloon seat 1 by threads. Rotating the round nut 6 can fasten the opening 42 between the shoulder 12 and the round nut 6. This fastening method is simple and reliable, and is convenient for on-site operation and maintenance.

[0070] In one exemplary embodiment of this disclosure, the pressurizing oil cup may further include a rubber ring 7, which is located between the opening 42 of the housing 4 and the balloon seat 1, and can be fitted into a snap-fit ​​groove. The design of the rubber ring 7 can buffer vibrations during flight, reduce friction and wear between the housing 4 and the balloon seat 1, and extend the service life of the system.

[0071] In some embodiments of this disclosure, the external thread on the outer side of the balloon seat 1 also provides a convenient mechanical interface for connecting the pressure cup to external equipment (electro-hydraulic brake valve body). Through the cooperation of the external thread with the external equipment, the pressure cup can be easily integrated into various hydraulic systems, achieving broad compatibility and application flexibility.

[0072] The following is a brief explanation of the usage and working principle of the booster oil cup used in the electro-hydraulic brake valve disclosed herein:

[0073] When the booster oil cup is not filled with hydraulic oil, such as Figure 2 As shown, the elastic bladder 2 contains a certain amount of air and is not inflated, remaining in a free state. During filling, a common oil injection device can be used to open the core 32 and inject hydraulic oil into the elastic bladder 2.

[0074] After being filled with oil, the elastic balloon 2 gradually inflates until it is tightly attached to the inner wall of the shell 4, preventing further oil filling. Figure 3 As shown, the pressure-boosting oil cup is currently full. Due to the elasticity of the elastic bladder 2, its expansion creates pressure on the internally stored hydraulic oil. The magnitude of this pressure is determined by the elastic force of the elastic bladder 2. By adjusting the material, shape, thickness, and oil volume of the elastic bladder 2, the pressure-boosting oil cup can achieve a pressure value ranging from several hundred Pascals to several thousand Pascals. This pressure value is relatively small and insufficient to drive the brake, thus preventing brake activation. Furthermore, the electro-hydraulic brake valve operating at this pressure value can smoothly draw oil from the pressure-boosting cup, thereby replenishing the oil in the piston chamber. It should be noted that when venting the gas inside the elastic bladder 2, the pressure-boosting oil cup can be inverted with the opening facing upwards. Then, the protrusion 322 of the core 32 can be pressed, utilizing the pressure generated by the elastic force of the elastic bladder 2 to expel the gas until hydraulic oil flows out, indicating that all gas has been released.

[0075] This disclosure also provides an electrostatic brake valve, which may include the pressure-boosting oil cup for electrostatic brake valves in any of the above embodiments. The structure and beneficial effects of the pressure-boosting oil cup for electrostatic brake valves can be found in the pressure-boosting oil cups for electrostatic brake valves in the above embodiments, and will not be described in detail here.

[0076] In one exemplary embodiment of this disclosure, the electro-hydraulic brake valve may further include a valve body, which is threadedly connected to the outer periphery of the ball seat 1. The valve body has a top-opening portion that can press the area of ​​the protrusion 322 that extends beyond the sealing cylinder 31 to release the seal between the protrusion 322 and the sealing cylinder 31, allowing oil to flow through the oil passage into the piston chamber of the valve body. For example, the valve body has an oil inlet communicating with the piston chamber, and the oil inlet has a top-opening portion, which may be rod-shaped. When it is necessary to replenish oil to the piston chamber, the top-opening portion can press the area of ​​the protrusion 322 that extends beyond the sealing cylinder 31, thereby releasing the seal between the protrusion 322 and the sealing cylinder 31, allowing oil to flow from the elastic ball 2 into the piston.

[0077] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A pressure-boosting oil cup for an electro-hydraulic brake valve, characterized in that, include: The balloon seat includes a through first open end and a second open end, and the outer periphery of the first open end is provided with a flange that protrudes radially outward; An elastic balloon is used to carry oil; the elastic balloon has a recess, the bottom of the recess has an opening, the recess is fitted around the outer periphery of the flange, and the opening communicates with the first open end. The self-sealing connector includes a sealing cylinder, a core, and a spring. The sealing cylinder is disposed within the balloon seat, and the core is disposed within the sealing cylinder. The core includes a protrusion and a spring seat connected to each other. The spring seat is located on the side of the protrusion closer to the elastic balloon. The spring is disposed within the spring seat, and the end of the spring away from the bottom of the spring seat abuts against the inner wall of the first open end. The bottom of the spring seat is provided with an oil passage hole. A portion of the protrusion protrudes beyond the sealing cylinder, and the outer wall of the protrusion is sealed to the inner wall of the sealing cylinder. Pressing the portion of the protrusion that protrudes beyond the sealing cylinder releases the seal between the protrusion and the sealing cylinder, allowing the oil to flow out through the oil passage hole.

2. The pressurized oil cup according to claim 1, characterized in that, The pressurizing oil cup also includes: The shell is fitted around the outer periphery of the elastic balloon and connected to the outer wall of the balloon seat; the shell is provided with a vent hole.

3. The pressurized oil cup according to claim 1, characterized in that, The inner wall of the sealing tube at the end away from the elastic balloon is a conical surface, and the radial dimension of the conical surface gradually decreases from the side closer to the elastic balloon to the side farther away from the elastic balloon. The surface of the portion of the protrusion away from the spring seat is a conical surface, and the conical surface of the protrusion is provided with an annular groove that is recessed radially inward. The pressurizing oil cup also includes: A sealing ring is disposed within the annular groove; the conical surface in the sealing cylinder abuts against the conical surface on the protrusion, and the sealing ring is in sealing fit with the conical surface in the sealing cylinder; and when the area protruding from the protrusion outside the sealing cylinder is pressed, the sealing state between the sealing ring and the conical surface in the sealing cylinder can be released.

4. The pressurized oil cup according to claim 1, characterized in that, The sealing cylinder has an external thread on its outer periphery, and the balloon seat has an internal thread on its inner periphery. The sealing cylinder and the balloon seat are connected by the external thread and the internal thread.

5. The pressurized oil cup according to claim 2, characterized in that, The balloon seat has a shoulder at the end near the elastic balloon and a snap-fit ​​groove on the side of the shoulder away from the elastic balloon and adjacent to the shoulder. The snap-fit ​​groove surrounds the outer wall of the balloon seat around its outer periphery. The opening of the housing is annular and is located on the side of the shoulder away from the elastic balloon. The opening abuts against the shoulder, and the shoulder is located inside the housing. The outer periphery of the balloon seat is provided with external threads, and the pressure cup also includes a round nut. The round nut is sleeved on the outer periphery of the balloon seat and is connected to the balloon seat by threads. Rotating the round nut can fasten the opening between the shoulder and the round nut.

6. The pressurized oil cup according to claim 5, characterized in that, The pressurizing oil cup also includes: A rubber ring is located between the opening and the balloon seat, and is fitted inside the snap-fit ​​groove.

7. The pressurized oil cup according to claim 1, characterized in that, The balloon seat is further provided with a protrusion inside, which surrounds the inner wall of the balloon seat; the sealing cylinder is further provided with a groove on the outer periphery of the end away from the elastic balloon, which surrounds the outer periphery of the sealing cylinder. The pressurizing oil cup also includes: A rubber pad is fitted into the slot and abuts against the surface of the boss.

8. The pressurizing oil cup according to any one of claims 1-7, characterized in that, The elastic balloon is made of rubber, rubber-plastic composite, or elastic plastic.

9. An electro-hydraulic brake valve, characterized in that, Includes the booster oil cup for an electro-hydraulic brake valve as described in any one of claims 1-8.

10. The electro-hydraulic brake valve according to claim 9, characterized in that, Also includes: The valve body is threadedly connected to the outer periphery of the balloon seat. The valve body is provided with a top opening portion, which can press the area of ​​the protrusion that protrudes beyond the sealing cylinder to release the sealing state between the protrusion and the sealing cylinder, and allow the oil to flow out through the oil passage into the piston chamber of the valve body.

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