Sealing structure of oil storage device of passive electric control brake valve

Abstract

The utility model relates to the technical field of airplane brake systems, in particular to a sealing structure of an oil storage device of a passive electric control brake valve, which comprises an oil storage cup, an oil cup cover, an exhaust nozzle, a nut and an O-shaped sealing ring, the oil cup cover is arranged on the oil storage cup through threads, the exhaust nozzle is arranged on the oil cup cover through threads, the nut is sleeved on the exhaust nozzle, and the O-shaped sealing ring is arranged on the nut. A first counter bore and a second counter bore are coaxially formed above a threaded hole, where the exhaust nozzle is installed, of the oil cup cover, the first counter bore is located below the second counter bore, a fillet is formed in the joint of the first counter bore and the second counter bore, the exhaust nozzle is provided with an annular groove used for installing an O-shaped sealing ring, the two sides of the annular groove are conical surfaces, and the two sides of the annular groove are conical surfaces. The joint of the conical surface and the cylindrical surface at the bottom of the annular groove is rounded; according to the oil storage cup, the oil sealing effect can be achieved, the problem that oil permeates into threads due to the fact that gaps exist between the threads between nylon materials and metal materials can be solved, and the sealing performance of the oil storage cup is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to an airplane brake system technical field, especially relate to a passive electric control brake valve oil storage device sealing structure. BACKGROUND

[0002] The passive electric control brake valve has the advantages of simple structure, light weight and good economy, and is widely used in the brake system of small and medium-sized unmanned aerial vehicles.

[0003] The existing passive electric control brake valve generally selects nylon material for the oil storage cup, selects metal material for the exhaust nozzle, and connects the oil storage cup and the exhaust nozzle through threads. There is a gap between the threads of the nylon material and the metal material, which cannot guarantee good oil sealing. During use and transportation, if the oil storage cup is inverted or the oil level is too high, oil may leak from the thread of the exhaust nozzle, which has poor reliability and high maintenance cost. UTILITY MODEL CONTENTS

[0004] To solve the problems mentioned in the background, the utility model provides a passive electric control brake valve oil storage device sealing structure.

[0005] The utility model discloses the following technical scheme: a passive electric control brake valve oil storage device sealing structure, including oil storage cup, oil cup cover, exhaust nozzle, nut and O type sealing ring, the oil cup cover is installed on the oil storage cup through thread, the exhaust nozzle is installed on the oil cup cover through thread, the nut is sleeved on the exhaust nozzle, the oil cup cover installs the thread hole above the exhaust nozzle, the first counterbore and the second counterbore are located coaxially above the thread hole, the first counterbore is located below the second counterbore, the junction of the first counterbore and the second counterbore is rounded, the exhaust nozzle is provided with annular groove for installing O type sealing ring, both sides of the annular groove are conical surfaces, and the junction of the conical surface and the cylindrical surface of the bottom of the annular groove is rounded.

[0006] Further, the rounded corner of the junction of the first counterbore and the second counterbore is R0.3.

[0007] Further, the angle between the conical surface of both sides of the annular groove and the axis of the exhaust nozzle is 45°.

[0008] Further, the rounded corner of the junction of the conical surface of both sides of the annular groove and the cylindrical surface is R0.3.

[0009] Further, a rectangular sealing ring is arranged between the oil storage cup and the oil cup cover.

[0010] Further, the exhaust nozzle is further provided with a protective cap.

[0011] Beneficial effects: compared with the prior art, the passive electric control brake valve oil storage device sealing structure of the utility model installs O type sealing ring through setting annular groove on the exhaust nozzle, sets counterbore on the oil cup cover, when the exhaust nozzle is installed on the oil cup cover, the O type sealing ring is located in the counterbore, uses the nut to lock the exhaust nozzle at the same time and tightens the O type sealing ring, so that the O type sealing ring fills in the annular groove and the counterbore, reaches the sealing effect, can effectively prevent oil leakage, improves the reliability of product. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is the whole structure schematic diagram of the utility model;

[0013] Figure 2 It is the oil cup cover structure schematic diagram of the utility model;

[0014] Figure 3 It is the exhaust nozzle structure schematic diagram of the utility model;

[0015] Figure 4 It is Figure 1 the enlarged schematic diagram of A place;

[0016] In the drawing: 1-stores oil cup, 2-oil cup cover, 3-exhaust nozzle, 4-nut, 5-O type sealing ring, 6-rectangular sealing ring, 7-protective cap, 21-first counterbore, 22-second counterbore, 31-annular groove. DETAILED DESCRIPTION

[0017] As Figures 1 to 4 shown, a kind of passive electric control brake valve oil storage device sealing structure, including oil storage cup 1, oil cup cover 2, exhaust nozzle 3, nut 4 and O type sealing ring 5, the oil cup cover 2 is installed on oil storage cup 1 by screw thread, the exhaust nozzle 3 is installed on oil cup cover 2 by screw thread, the nut 4 is fixed on exhaust nozzle 3 and is set on exhaust nozzle 3, the screw hole of the oil cup cover 2 installation exhaust nozzle 3 is coaxially provided with first counterbore 21 and second counterbore 22 above, first counterbore 21 is located below second counterbore 22, O type sealing ring 5 is installed in first counterbore 21, second counterbore 22 is used to install nut 4, the junction of first counterbore 21 and second counterbore 22 is rounded, when installing exhaust nozzle 3, it can prevent O type sealing ring 5 from being scratched, the exhaust nozzle 3 is equipped with the annular groove 31 for installing O type sealing ring 5, the annular groove 31 both sides are conical surface, and the junction of conical surface and the cylindrical surface of annular groove 31 bottom is rounded.

[0018] The fillet of the joint of the first counterbore 21 and the second counterbore 22 is R0.3, which effectively prevents the O-shaped sealing ring 5 from being scratched when the exhaust nozzle 3 is installed; the included angle between the two tapered surfaces on both sides of the annular groove 31 and the axis of the exhaust nozzle 3 is 45°, which facilitates the installation of the O-shaped sealing ring 5; the fillet of the joint of the two tapered surfaces on both sides of the annular groove 31 and the cylindrical surface is R0.3, the O-shaped sealing ring 5 is installed in the annular groove 31, and when the exhaust nozzle 3 is installed on the oil cup cover 2, the O-shaped sealing ring 5 is deformed by extrusion to fill the fillet, thereby increasing the sealing effect; the rectangular sealing ring 6 is arranged between the oil storage cup 1 and the oil cup cover 2, the cross section of the rectangular sealing ring 6 is rectangular, which effectively prevents oil leakage to the threaded portion and increases the sealing effect; the protective cap 7 is further arranged on the exhaust nozzle 3 to prevent oil from flowing out of the exhaust nozzle 3 and prevent foreign matter from entering the oil storage cup 1.

[0019] When the exhaust nozzle 3 is installed, the nut 4 is screwed to the threaded top of the exhaust nozzle 3 through the threaded bottom of the exhaust nozzle 3, then the O-shaped sealing ring 5 is assembled to the annular groove 31 of the exhaust nozzle 3, and then the threaded bottom of the exhaust nozzle 3 is screwed into the oil cup cover 2, so that the O-shaped sealing ring 5 is pressed into the first counterbore 21 of the oil cup cover 2, the direction of the exhaust nozzle 3 is adjusted, the nut 4 is screwed into the second counterbore 22 of the oil cup cover 2, the nut 4 is tightened to fix the exhaust nozzle 3 and press the O-shaped sealing ring 5, the O-shaped sealing ring 5 is deformed by extrusion to fill the annular groove 31 of the exhaust nozzle 3 and the first counterbore 21 of the oil cup cover 2, thereby achieving the effect of oil sealing, which can avoid the problem that the gap between the threads of the nylon material and the metal material causes oil to penetrate into the threads, thereby improving the sealing performance of the oil storage cup 1.

[0020] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A sealing structure for a passive electronically controlled brake valve oil storage device, comprising an oil storage cup (1), an oil cup cover (2), an exhaust nozzle (3), a nut (4) and an O-ring (5), characterized in that: The oil cup cover (2) is mounted on the oil storage cup (1) through a thread, the exhaust nozzle (3) is mounted on the oil cup cover (2) through a thread, the nut (4) is sleeved on the exhaust nozzle (3), a first countersunk hole (21) and a second countersunk hole (22) are coaxially provided above the threaded hole of the oil cup cover (2) for mounting the exhaust nozzle (3), the first countersunk hole (21) is located below the second countersunk hole (22), a corner of the junction between the first countersunk hole (21) and the second countersunk hole (22) is rounded, the exhaust nozzle (3) is provided with an annular groove (31) for mounting an O-ring (5), both sides of the annular groove (31) are conical surfaces, and a corner of the junction between the conical surface and the cylindrical surface at the bottom of the annular groove (31) is rounded.

2. The sealing structure of the passive electronically controlled brake valve oil storage device according to claim 1, characterized in that: The fillet at the junction of the first countersunk hole (21) and the second countersunk hole (22) is R0.

3.

3. The sealing structure of the passive electronically controlled brake valve oil storage device according to claim 1, characterized in that: The angle between the conical surfaces on both sides of the annular groove (31) and the axis of the exhaust nozzle (3) is 45°.

4. The sealing structure of the passive electronically controlled brake valve oil storage device according to claim 1, characterized in that: The fillet angle at the junction of the conical surface and the cylindrical surface on both sides of the annular groove (31) is R0.

3.

5. The sealing structure of the passive electronically controlled brake valve oil storage device according to claim 1, characterized in that: A rectangular sealing ring (6) is provided between the oil storage cup (1) and the oil cup cover (2).

6. The sealing structure of the passive electronically controlled brake valve oil storage device according to claim 1, characterized in that: The exhaust nozzle (3) is also provided with a protective cap (7).

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