Anti-cutting assembly device for sealing ring passing through through hole

Abstract

The utility model discloses a through-hole sealing ring cut-damage prevention assembly device, which comprises a mandrel, a pair of limit bushes and a fastening plug screw, the limit bushes are designed to be symmetrical structures, the inner side structures of the limit bushes are consistent with those of a valve so that the wall surface of a valve shell can be conveniently wrapped, and the outer sides of the limit bushes are in threaded connection with the fastening plug screw. The limiting bush is provided with a hole which is consistent with the hole part of the wall face of the valve in shape, the mandrel is in interference fit and press-fitting connection with the hole, the mandrel is in clearance fit with the hole part of the valve to fill up the hole of the valve, and the symmetrical halving type limiting bush is convenient to wrap a round wall and the mandrel which is consistent with the hole of the valve in shape. The hole can be ingeniously filled in cooperation with the limiting bush, the limiting bush and the mandrel are fastened through the fastening plug screw, and the limiting bush, the mandrel and the limiting bush are matched with each other, so that the hole of the valve is invisible, the sealing ring is prevented from being cut when passing through the hole, disassembly and assembly are easy, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of aerospace assembly technology, and particularly relates to an assembly device for preventing the cutting of a through-hole sealing ring. Background Art

[0002] At present, there are many hole wall structures inside aerospace hydraulic valve products. When the sealing element passes through this kind of structure, due to the sharp edges of the wall surface or the extrusion of the holes, the sealing element will be damaged and unable to seal. Repeated disassembly and assembly often have no effect. The presence of the hole wall cannot be avoided, and the qualification rate is extremely low, seriously affecting the assembly efficiency. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a new type of assembly device for preventing the cutting of an O-ring through a through-hole, so as to solve the problems of great assembly difficulty and low efficiency when the aerospace sealing ring passes through the through-hole of the arc wall surface.

[0004] The technical solution of the utility model: An assembly device for preventing the cutting of a through-hole sealing ring includes a mandrel, a limit bushing, and a tightening plug. The limit bushing is designed as a pair and has a symmetrical structure. The inner structure is the same as that of the valve part, which is convenient for wrapping the wall of the valve part housing. The outer side of the limit bushing is threadedly connected with the tightening plug. The limit bushing is provided with holes whose shapes are the same as the gap part and the hole shape of the valve part wall. The mandrel is press-fitted and connected with the hole in an interference fit and is in clearance fit with the gap part of the valve part to fill the hole of the valve part.

[0005] Further, a first taper angle limit is provided after the thread relief groove on the outer side of the limit bushing, and a second taper angle is designed on the inner side of the tightening plug after the thread relief groove to be in tight fit with the first taper angle. When the tightening plug is screwed tightly, it plays a limiting role and is convenient for clamping tightly.

[0006] Further, the outer part of the limit bushing is milled flat for convenient disassembly and assembly.

[0007] Further, the internal thread structure of the tightening plug is designed to be threadedly and firmly connected with the limit bushing, and the whole device is clamped tightly to the hole wall of the valve part. The outer part is milled flat for convenient disassembly and assembly.

[0008] Further, when the mandrel is in clearance fit with the gap part of the valve part, the distance from the inner wall surface of the valve part is 0 < d ≤ 0.5m, and the mandrel is not allowed to protrude from the gap of the inner wall hole of the valve part. The hole of the valve part is filled skillfully, avoiding the sealing ring being cut by the sharp edge structure of the hole, and the clearance fit is installed for the part cooperating with the valve part.

[0009] The diameter dimension of the mandrel is divided into two sections. One half takes the upper tolerance, which is convenient for the tight fit between the mandrel and the limit bushing and prevents falling off. The other half takes the lower tolerance, which is convenient for disassembly and assembly when used with the valve part.

[0010] The beneficial effects of this utility model are: the symmetrical half-type limiting bushing is easy to wrap around the circular wall, the mandrel that matches the shape of the valve hole can cleverly fill the hole when it is matched with the limiting bushing, and the fastening plug secures the limiting bushing and the mandrel. The three work together to make the valve hole invisible, avoid cutting the sealing ring when it passes through the hole, simplify disassembly and assembly, and improve assembly efficiency. Attached Figure Description

[0011] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments conforming to the present invention and, together with the description, serve to explain the principles of the present invention. Obviously, the drawings described below are merely some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort. In the drawings:

[0012] Figure 1 A schematic diagram of the anti-cutting assembly device for the through-hole sealing ring provided by this utility model;

[0013] Figure 2 A schematic diagram of the limiting bushing structure provided by this utility model;

[0014] Figure 3 for Figure 2 Schematic diagram of the structure in the AA direction;

[0015] Figure 4 Left view of the limiting bushing provided by this utility model;

[0016] Figure 5 This is a schematic diagram of the fastening screw plug structure provided by this utility model;

[0017] Figure 6 Right view of the fastening screw plug provided by this utility model;

[0018] Figure 7 A schematic diagram of the mandrel structure provided by this utility model;

[0019] Figure 8 A schematic diagram of the valve structure provided by this utility model;

[0020] In the attached image:

[0021] 1-Limiting bushing, 11-Hole, 2-Mandrel, 21-Large end, 22-Small end, 3-Fixing plug, α-Cone angle one, β-Cone angle two. Detailed Implementation

[0022] 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 examples set forth herein; rather, these embodiments are provided to make the present invention more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0023] Please see Figure 1-8 The present invention will now be described in further detail through specific embodiments and in conjunction with the accompanying drawings.

[0024] Figure 1 This invention illustrates a through-hole sealing ring anti-cutting assembly device, comprising a limiting bushing 1, a mandrel 2, and a fastening plug 3. The limiting bushings 1 are a pair and symmetrical in structure. The inner structure of the limiting bushing 1 matches the outer shape of the valve component 4. The outer side of the limiting bushing 1 is threadedly connected to the fastening plug 3. The limiting bushing 1 has a hole 11 whose shape and aperture of the valve component 4 wall are identical. The mandrel 2 is press-fitted to the hole 11 and clearance-fitted to the aperture of the valve component 4. When the mandrel 2 is clearance-fitted to the aperture of the valve component 4, the top end of the mandrel 2 is 0 mm from the inner wall surface of the valve component 4. <d≤0.5mm。

[0025] The limiting bushing 1 has a tapered angle α behind the outer threaded relief groove, and the fastening plug 3 has a tapered angle β behind the inner threaded relief groove, which fits snugly against the tapered angle α. The limiting bushing 1 and the fastening plug 3 are both milled flat on the outside.

[0026] The mandrel 2 is a tapered mandrel, which includes a small end 21 with a small end diameter that is within the lower tolerance and a large end 22 with a large end diameter that is within the upper tolerance. The small end 21 is close to the inner wall of the valve 4.

[0027] The mandrel 2 is press-fitted onto the limiting bushing 1 and partially assembled into the circular hole on the wall of the valve component 4. The fastening plug 3 is tightened to fill the thread of the limiting bushing 1, so that the circular hole of the valve component 4 is filled. The top of the mandrel 2 is 0 mm away from the inner arc surface of the valve component 4. <d≤0.5m。

[0028] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Any modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model, as long as they do not depart from the spirit and scope of the technical solution of this utility model, are all covered within the scope of the claims of this utility model.

Claims

1. A device for preventing cuts to sealing rings through through holes, characterized in that: The device includes a limiting bushing (1), a spindle (2), and a fastening plug (3). The limiting bushings (1) are a pair and have a symmetrical structure. The inner structure of the limiting bushing (1) is consistent with the outer shape of the valve (4). The outer side of the limiting bushing (1) is threadedly connected to the fastening plug (3). The limiting bushing (1) has a hole (11) that is consistent with the shape of the gap portion and the hole shape of the valve (4). The spindle (2) is press-fitted to the hole (11) with an interference fit and to the gap portion of the valve (4) with a clearance fit.

2. The anti-cutting assembly device for through-hole sealing rings according to claim 1, characterized in that: The limiting bushing (1) has a tapered angle (α) behind the outer threaded relief groove, and the fastening plug (3) has a tapered angle (β) behind the inner threaded relief groove that fits snugly against the tapered angle (α).

3. The anti-cutting assembly device for through-hole sealing rings according to claim 1, characterized in that: The limiting bushing (1) has an external milling design.

4. The anti-cutting assembly device for through-hole sealing rings according to claim 1, characterized in that: The fastening plug (3) has an external milling design.

5. The anti-cutting assembly device for through-hole sealing rings according to claim 1, characterized in that: The mandrel (2) is a tapered mandrel. The tapered mandrel includes a small end (21) with a small end diameter that is within the lower tolerance and a large end (22) with a large end diameter that is within the upper tolerance. The small end (21) is close to the inner wall of the valve (4).

6. The anti-cutting assembly device for through-hole sealing rings according to claim 1, characterized in that: When the mandrel (2) is in clearance fit with the orifice of the valve (4), the distance from the inner wall of the valve (4) is 0. <d≤0.5mm。

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