Multilink band clamp

FIELD: mechanics.

SUBSTANCE: said invention relates to quick-release elements of flange connections, in particular, to band clamps. The clamp consists of a tie band with loop knots, in which band-fixed tie elements are installed, and a tie bolt and nut. On one side of the tie band there is a recess, links being provided with outer clamps, while tension sleeves with side shoulders act as tie elements. On shoulders of the first sleeve, there are flats, while inner surfaces of the other sleeve are parallel-plane, a clearance of 2-3% of the tie band outer diameter is being provided between the sleeve flat surface and the nut end.

EFFECT: enhanced reliability of the machine fastening security and enhanced ease of the clamp manufacture and installation.

2 dwg

 

The invention relates to aircraft engine, namely to the quick items flange joint Assembly with gearbox for a gas turbine engine, and can be used in General mechanical engineering.

Known clamps tape multi-tier (Branch standard OST 111534 - 74, UDC 621.885.7:629.7 GST 75 9560. Edition of the official BORN 3535 from 28.08.74 year).

A disadvantage of the known designs is that the design of the tape will not allow the replacement level after welding hinge, Assembly tape with links is performed before setting the tension of the sleeves and making loops. In addition, the most serious drawback is that the second tension sleeve can be mounted with 180° and when this is not provided the tightening flange. This disadvantage has repeatedly shown the replacement unit on the engine operating companies.

Closest to the claimed design is a clip consisting of a tie belt with loops at the ends that have the elastic elements, and also from links attached to the ribbon, and tie down bolt with nut (patent of great Britain No. 1308043, publ. 1973).

A disadvantage of the known designs adopted for the prototype is that the links to tie the ribbon tightly fastened with rivets. It is also known that when the article is givani tape has some lengthening its due to the plastic deformation, herewith, links, wrestled with the surfaces of the connected parts, due to friction remain motionless. Consequently, the rivet can be cut by moving the tape relative to the links at least on the links located at the ends of the ribbon.

The technical problem on which the invention is directed, is to improve the reliability of mounting the unit and to increase the manufacturability and Assembly of the clip.

The essence of the technical solution is that the belt clip multi-tiered, consisting of a tie belt with loops at the ends that have the elastic elements from links attached to the ribbon, and tie down bolt with nut, according to the invention, tie the ribbon is made unilateral sample, while the links are external seizures, and tension elements in the form of a tension sleeves with side anges at the edges, and on the shoulder one sleeve done the flats, and the second sleeve inner surface is made flat and parallel, between the planar surface of the sleeve and an end surface the nut is provided with a gap of 2-3% of the outside diameter of the tie ribbon.

Unilateral selection on the tape is made to assemble with parts and external grippers on the links provide a connection to the tape, which increases the nade is the possibility of mounting the unit.

The execution of the tightening elements in the form of a tension sleeves with side fillets on the edges ensures the retention of the bushings in the hinges, which also increases the reliability of mounting the unit.

Carry on the shoulder one sleeve attened builds links with ribbon and placed symmetrically to the flat surface of the second sleeve to provide a gap of 2-3% between the planar surface of the sleeve and an end surface of the nut from the outer diameter of the clamping strip, which improves manufacturability and Assembly of the clip.

1 shows a General view of the belt clip.

Figure 2 - element I in figure 1 (at the link and the first tension sleeve when building links with belt clip).

Tape ladder clamp consists of parts 1, tie belt with 2 loops 3 and 4 at the ends. In the loop 3 is the first tensioning sleeve 5, which serves for fastening of the clamping bolt 6 by a nut 7. The second tension sleeve 8 is located in the loop 4. On the 6 bolt is a washer 9 and nut 10. On the links 1 are external grippers 11, which parts are held on the ribbon 2. On the lateral flange 12 of the first tension sleeve 5 has two flats on 13 located in the same plane. The second tension sleeve 8 has flat parallel inner surface 14, symmetrically located relative to the axis of the sleeve. On a certain area of stage the second belt 2 is one-sided sample 15. On the nut 10 with holes 16 for safety wire 17. Nut 7 has an end surface 18, which is the punch. Figure 2 shows the extreme position of link 1 and the position of the first tension sleeve 5 when assembling parts 1 and tape 2 of the clamp. Extreme link 1 maximum offset tape 2 in the direction of the sleeve 5 and the gripper 11 is combined with the faces 13 of the flange 12.

The clamp is collected as follows. Stretch sleeve 5 and 8 are located in the loops 3 and 4. The ends of the loops 19 and 20 are welded to the tape 2. Links 1 collected with the tape 2 at the location of the sample 15. One of the grippers 11 of the element 1 is slid to the tape 2 in front of the sample 15, and opposite the grip of the same link is slid in the sample 15, and then move the link 1 to tape 2 and the same procedure set the next link 1. Before assembling the last level 1 first tension sleeve 5 rotates flats 13 at link 1 and link itself to displace the sleeve 5 so that it grips 11 are in the flats 13. Next, distribute the tape 2 the other elements 1 so that the last set of link 1 to collect from tape 2, as the previous links. After Assembly of the parts 1 and tape 2 offset link 1 extreme to the sleeve 5, the tape 2 in the direction of the other links. Next, deploy the sleeve 5 flats 13 180° and collect it with the clamping bolt 6 and nut 7. In this position of the sleeve 5 links 1 have the I on the ribbon 2 thus, their grips 11 at any offset of all parts 1 to tape 2 does not fall on the sample 15. This ensures solid state units 1 and tape 2. The nut 7 is tightened on the clamping bolt 6 and is fixed on the end surface 18.

The device operates as follows. The joined flanges of the box and drive unit cover clamp ladder tape on the outer tapered surfaces of the adapter box and Assembly. The clamping screw 6 is slid into the hole of the second tension sleeve 8, put a washer 9 and screw the nut 10. Before the screw nut 10 lubricate threaded connection grease, corresponding to the materials of the threaded connection of the bolt 6 and the nut 10. The units have 1 with a gap between them. Tighten the nut 10 estimated time and provide a gap And between the end surface 18 of the nut 7 and the flat surface 14 of the second sleeve 8, is equal to 2-3% of the outer diameter D of the tape 2 mounted clamp. Then) nut 10 through the opening 16 therein a wire controlkey 17 to the loop 4.

The fastener tape multi-tiered, consisting of a tie belt with loops at the ends that have the elastic elements from links attached to the ribbon, and tie down bolt with nut, characterized in that tie the ribbon is made unilateral sample, while the links are external for the wool, and the elastic elements are in the form of a tension sleeves with side anges at the edges, and on the shoulder one sleeve done the flats, and the second sleeve inner surface is made flat and parallel, between the planar surface of the sleeve and the end surface of the nut is provided with a gap of 2-3% of the outside diameter of the tie ribbon.



 

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