CN201934778U

CN201934778U - Superfluous object prevention device for rod-type kinematic pair

Info

Publication number: CN201934778U
Application number: CN 201020687412
Authority: CN
Inventors: 何延文; 张占峰; 宋涛; 李娟娟; 石朝锋; 曹荣; 王堃; 李德权; 孙法国; 王占彬; 余锋; 岳兵
Original assignee: Beijing Institute of Astronautical Systems Engineering
Current assignee: Beijing Institute of Astronautical Systems Engineering
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-08-17
Anticipated expiration: 2020-12-29

Abstract

The utility model belongs to a component of a valve used for a carrier rocket, and particularly relates to a superfluous object prevention device for a rod-type kinematic pair. The superfluous object prevention device for the rod-type kinematic pair comprises a rod, wherein the rod is sleeved with a guide sleeve, a groove and a boss are arranged on the excircle cylindrical surfaces at the two ends the guide sleeve, S-shaped dustproof rings are installed at the two ends of the guide sleeve respectively, an inner boss of the S-shaped dustproof ring is inserted into the groove of the guide sleeve, and the boss on the guide sleeve is inserted into an inner groove of the S-shaped dustproof ring. The superfluous object prevention device has the advantages that the rod moves in the guide sleeve, as the dustproof rings tightly hold the rod, superfluous objects are prevented from entering a fit clearance between the rod and the guide sleeve, and the rod is prevented from clamping motion caused by the superfluous objects.

Description

The secondary anti-fifth wheel device of a kind of bar type games

Technical field

The utility model belongs to a kind of parts that are applied to the valve of carrier rocket, is specifically related to the secondary anti-fifth wheel device of a kind of bar type games.

Background technique

Present bullet (arrow) body valve lever type games pair does not all have and prevents that fifth wheel from entering the device of the matching gap of kinematic pair, and in a single day fifth wheel enters matching gap, promptly may cause bar motion clamping stagnation.

Summary of the invention

The purpose of this utility model provides and a kind ofly can solve present bullet rocket body valve lever type games pair and can not prevent that fifth wheel enters the secondary anti-fifth wheel device of motion matching gap problem bar type games.

The utility model is to realize like this, the secondary anti-fifth wheel device of a kind of bar type games, it comprises bar, bar is enclosed within the guide sleeve, fluted and boss on the external cylindrical surface of guide sleeve two ends, a S type dust ring is respectively adorned at the guide sleeve two ends, and the inner convex platform of S type dust ring inserts in the groove of guide sleeve, and the boss on the guide sleeve inserts in the inner groovy of S type dust ring.

In the outer groove of described S type dust ring snap ring is installed all, the snap ring internal diameter is less than the outer recess base diameter of S type dust ring.

Described snap ring is made by Spring Steel Wire, and is jagged on the ring.

S type dust ring is a ring, and slant cutting edge is arranged on the annulus, and material is plastics.

The utility model has the advantages that bar moves in guide sleeve and since dust ring with held bar tightly, thereby prevent that fifth wheel from entering the matching gap of bar and guide sleeve, avoid the unnecessary motion clamping stagnation that causes bar.

Description of drawings

Fig. 1 is the secondary anti-fifth wheel device schematic representation of a kind of bar type games provided by the utility model;

Fig. 2 is a S type dust ring schematic representation.

Among the figure, 1 bar, 2 snap rings, 3S type dust ring, 4 guide sleeves, 5 slant cutting edges.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in detail:

As shown in Figure 1, the secondary anti-fifth wheel device of a kind of bar type games comprises bar 1, snap ring 2, S type dust ring 3, guide sleeve 4; Bar 1 is enclosed within the guide sleeve 4, and snap ring 2 is made by Spring Steel Wire, and is jagged on the ring; S type dust ring 3 is a ring, and slant cutting edge 5 is arranged on the annulus, and material is plastics, and S type dust ring 3 two ends are respectively interior outer lug boss, and are fluted on the inside and outside cylinder.Fluted and boss on the guide sleeve 4 two ends external cylindrical surfaces; Bar 1 inserts guide sleeve 4, and a S type dust ring 3 is respectively adorned at guide sleeve 4 two ends, and the inner convex platform of S type dust ring 3 inserts in the groove of guide sleeve, and the boss on the guide sleeve 4 inserts in the inner groovy of S type dust ring 3.S type dust ring 3 and guide sleeve 4 boss, the radial surface that groove is corresponding all do not contact; In the outer groove of two S type dust rings 3 snap ring 2 is installed all, snap ring 2 internal diameters are less than S type dust ring 3 outer recess base diameter, and under snap ring 2 effects, the internal surface of S type dust ring 3 is held bar 1 tightly.

Bar 1 moves in guide sleeve 4, because S type dust ring 3 has been held bar 1 tightly, thereby prevents that fifth wheel from entering the matching gap of bar 1 and guide sleeve 4, avoids the unnecessary motion clamping stagnation that causes bar.

The utility model can be used on bullet (arrow) the body valve, solves bullet (arrow) body valve lever kinematic pair and can not prevent that fifth wheel from entering motion matching gap problem, avoids bar motion clamping stagnation.

Claims

1. a bar type games pair is prevented the fifth wheel device, it is characterized in that: it draws together bar (1), bar (1) is enclosed within the guide sleeve (4), fluted and boss on the external cylindrical surface of guide sleeve (4) two ends, a S type dust ring (3) is respectively adorned at guide sleeve (4) two ends, the inner convex platform of S type dust ring (3) inserts in the groove of guide sleeve, and the boss on the guide sleeve (4) inserts in the inner groovy of S type dust ring (3).

2. the secondary anti-fifth wheel device of a kind of bar type games as claimed in claim 1, it is characterized in that: snap ring (2) all is installed in the outer groove of described S type dust ring (3), and the snap ring internal diameter is less than the outer recess base diameter of S type dust ring (3).

3. the secondary anti-fifth wheel device of a kind of bar type games as claimed in claim 1, it is characterized in that: described snap ring (2) is made by Spring Steel Wire, and is jagged on the ring.

4. the secondary anti-fifth wheel device of a kind of bar type games as claimed in claim 1, it is characterized in that: S type dust ring (3) is a ring, and slant cutting edge (5) is arranged on the annulus, and material is plastics.