Tie-rod with shock absorber and stop for prevention of reversible motion

FIELD: mechanical engineering.

SUBSTANCE: proposed tie-rod has bar (2) with connecting members (3, 4) at each end; its geometric axis passes through both connecting members (3, 4). Bar (2) is provided with safety zone (5)in form of reduced cross section between first section (6) of bar (2) coupled with first connecting member (3) and second section (7) of bar (2) coupled with second connecting member (4). Safety zone(5) is broken when force of tension applied to tie-rod exceeds the preset threshold magnitude; it is provided with devices (10, 11, 14) for making two sections (6, 7) of bar (2) nondetachable in case of breaking of safety zone (5). Thus, parts to be connected remain intact in case of excessive tensile force and connection of parts is ensured after breakdown of tie-rod.

EFFECT: enhanced efficiency and reliability.

7 cl, 5 dwg

 

The present invention relates to a connecting tagum, providing the link between the two structural elements.

The present invention relates, in particular, to the connecting deadlift containing rod having at each of its ends the body of the coupling and having a geometric axis X passing through both of the mentioned body connection.

The current level of technology a well-known technique used in particular in an aircraft, and which consists in forming a connection between two structural members by means of connecting rods. These connecting rods must be at the same time very light and strong in tension and compression.

In case of an impact in the corresponding structural element mentioned connecting rod is subjected to peak loads. At the same time to avoid destruction of structural elements, the repair of which is associated with considerable difficulties, the preferred option is implemented, according to which in case of exceeding a predefined threshold stress of the connecting rod absorbs the impact or as a result of plastic deformation, or simple fracture. However, in the event of failure of the coupling rod two constructive e the ment, United this thrust, become uncontrolled and may cause damage to the surrounding parts, and in this case, the connecting rod is no longer able to perform its design function.

In the patent FR 2795793 described fused thrust, providing energy absorption, which contains two coaxial element, namely the cylinder, equipped at one of its ends of the connecting body, and a rod connected with the second connecting body and containing the bezel, which is located in the cylindrical cavity of the above-mentioned cylinder, and two safety clutch, covering the said core, are located on either side of said rim, resting on the bottom of the cylinder and the surface of this rim. This link rod, therefore, contains some of the safety authority, able to collapse in the direction of stretching in the direction of compression. To adjust the resistance of each destructible safety body formed by coupling this organ contains many extended cut parallel to the geometric axis of the mentioned thrust. To ensure the parallelism of the two elements after buckling of the coupling mentioned cylinder contains from its connecting cylinder body is ical support surface, in which has the ability to slide the free end of the rod. Thus, the cylinder contains a massive area, which increases the weight of the rod. In addition, relief agencies are quite bulky and require a large amount of machining for the implementation of the mentioned cuts.

The technical problem of this invention is to develop a connecting rod of the traditional type, which can break down in the case, when the stretching force resulting from impact, exceeds in magnitude a predetermined threshold value, without creating damage to the surrounding parts, which ensures the fulfillment of its functions connection after the destruction and without an excessive increase in the weight of the structure.

Thus, the present invention relates to a connecting deadlift containing rod having at each end of the connector body and having a geometric axis X passing through both of the connecting body.

In accordance with the invention the connecting rod is characterized by the fact that the rod includes a safety zone in the form of a zone of reduced cross-section between the first section of the rod connected with the first connecting body and the second section of the rod associated with a second soybean is intalnim body and referred to the safety zone is intended for destruction in the case when the stretching force applied to the aforementioned connecting traction exceeds a predetermined threshold value, and means designed to make nereshennymi two sections of the rod in case of destruction referred to the safety zone.

Preferably, the means designed to make nereshennymi two areas mentioned rod, contained the body of the cylinder, coaxial with respect to the X-axis and rigidly connected one of its ends with the first section of the rod, and the cylinder body is at the other end of the bottom part, which made a hole, through which is able to slide the second section of the rod, and the cylinder body restricts some cylindrical cavity in which is mentioned the safety zone, and a rim formed around the second leg of the rod and having the ability to slide in said cylindrical cavity.

Thus, in the case of destruction referred to the safety zone of the second section of the rod is held coaxially in said cylinder, and its axial movement is limited by using the bottom part of the cylinder, which can be the t to rest against the said rim.

Preferably, offer link rod additionally contained mechanical means designed to cushion the impact in the event of failure of the safety zone.

These mechanical means include, for example, a set of teeth formed on the inner wall of the housing of the cylinder in the annular chamber bounded by the said rim and the bottom part of the body of the cylinder, and these teeth can be destroyed by the rim after the destruction of the safety zone.

Preferably, offer link rod additionally contained devices designed to prevent movement in the opposite direction of the second section of the rod after the destruction of the safety zone.

Preferably, these means for preventing reverse movement of the second section of the rod contained at least one first prong formed on the inner surface of the cylinder barrel against the spiral grooves made on the peripheral part of the bezel, and engagement of the first tooth with the said groove directly after the destruction of the safety zone should lead to torsion, at least one of the sections of the rod, and this first prong should form a stop preventing reverse movement after e is about overcoming rim in the reverse rotation sections of the rod under the effect of elasticity of the rod.

Other characteristics and advantages of the invention will be explained in the description of example with reference to the application drawings figures, in which:

figure 1 is a schematic view in longitudinal section of the coupling rod in accordance with the invention;

figure 2 is a schematic view in longitudinal section of the coupling rod, shown in figure 1, after the destruction of the safety zone;

figure 3 is a schematic view of the cylinder barrel in cross section along the line III-III shown in Fig 1;

figure 4 is a schematic view showing the scanning arrangement of teeth on the inner surface of the cylinder and the peripheral portion of the rim before the destruction of the safety zone in the connection deadlift containing means for preventing reverse movement;

figure 5 is a schematic view similar to the view shown in figure 4, and showing the position of the bezel after the destruction of the safety zone.

Figures 1 and 2 schematically presents the connecting rod 1 according to the invention, which contains a rod 2 having X-axis and equipped at each of its ends 2A and 2b of the connecting body, marked with the number 3 to the end 2A of the designated position 4 to the end 2b.

These connecting bodies 2A and 2b are the bodies of a type of ball joint, the axis of which is perpendicular to the axis X.

The rod 2 has a zone having a reduced cross-section and forming a safety zone 5 located between the first section 6 of the rod 2, which is located on the side of the first connecting body 3, and the second section 7 of the rod 2, which is located on the side of the second connecting body 4. This safety zone 5 is for its destruction in the case when the stretching force applied to this connection deadlift 1 exceeds some predetermined value, for example, due to a strike affecting one of the structural members connected by means of the coupling rod 1.

The first section 6 of the rod 2 is made appreciably shorter than the second section 7 of the rod 2, and it contains near its end 2A of the annular ledge 8, containing at its peripheral part of the thread that interconnects with the end 9 of the cylinder 10 and having an axis X.

The second section 7 of the rod 2 is in its Central zone of the rim 11 with the X-axis, and the diameter of the bezel is made slightly less than the diameter of the annular thickenings 8.

The cylinder 10 comprises a rod 2 is almost over its entire length. This cylinder contains at its end 9 int is nnyy thread, interacting with external thread annular ledge 8. The inner diameter of the cylinder exceeds the diameter of the rod 3 and is slightly larger than the diameter of the rim 11. This cylinder contains at its end 12 of the bottom part 13, which has a hole 14, which is located on the X-axis, through which passes the second section 7 of the rod 2. The bottom part 13 of the cylinder is made tough enough to withstand the pressure arising in the process of destruction of the safety zone 5, and the hole 14 is able to perform the function of a cylindrical support surface for the second leg of the rod 7.

The cylinder 10 limits the internal cavity 15, which is a safety zone 5 and the rim 11. This safety zone 5 is located near the end 9 of the cylinder 10, and the rim 11 is located essentially at half the distance between the safety zone 5 and the bottom part 13 of the cylinder 10.

In the event of failure of the safety zone 5 internal wall of the cylinder 10 forms a cylindrical bearing surface for the rim 11.

Thus, the construction described above of the coupling rod allows you to determine the exact location of the fracture of the rod 2 in the case when the connecting rod 1 is subjected to tensile force exceeding a predetermined threshold value, using humanising the cross-section of the safety zone 5. In the event of failure of this safety zone 5 both section 6 and 7 of the rod 2 are nereshennymi due to the presence of the cylinder 10, rigidly connected with its end 9 with the first section 6 of the rod 2, and due to the presence of the bezel 11, a prisoner in the internal cavity 15 of the cylinder 10. The amplitude of the divergence of the axes of the two separated from each other by sections 6 and 7 of the rod 2 is also limited due to the fact that the bezel 11 slides in the cylinder 10 like a piston.

According to a preferred variant of the above, the connecting rod 1 further comprises mechanical means 20 designed to cushion the impact, due to the destruction of the safety zone 5.

These mechanical means 20 can be implemented, for example, in the form of protrusions or teeth 21 provided on the inner wall of the cylinder 10 in the chamber 22 bounded by a rim 11 and a bottom part 13 of the cylinder 10.

These teeth 21 preferred way distributed on one or more helical lines in the chamber 22 from the side of the bezel 11. These teeth 21 are of such length that they could be cut bezel 11 in displacement of the rim due to the destruction of the safety zone 5.

In the event of failure of this safety zone 5, the teeth 21 are sequentially broken one after the other. This means, Thu the teeth, located closest to the rim 11 in the normal position of the coupling rod 1 will be broken first. This solution allows you to gradually absorb at least part of the energy released by the destruction of the safety zone 5.

Destroyed teeth 21 remain prisoners in the chamber 22, and if the energy released as a result of destruction of the safety zone 5, is sufficient for the destruction of all teeth 21, the rim 11 will hold the remains of the ruined teeth 21 to the bottom part 13 of the cylinder 10 until the complete absorption of the remaining outstanding amount of the mentioned energy. As a consequence, the rim 11 will be able to move in the cylinder 10 as a function of direction of the forces acting on the coupling bodies 3 and 4.

4 and 5 schematically presents sweep the inner wall of the cylinder 10, which has two diametrically opposite spiral lines S1 and S2 of teeth 21, and each of the spiral lines S1 and S2 contains, for example, a half turn, and the two spiral lines S1 and S2 are diametrically opposite.

In the process of destruction of the safety zone 5 of the rim 11, which in the initial position, i.e. before the said destruction, is located in the immediate vicinity of the first teeth 21A of the two spiral lines S1 S2, first of all, will be to destroy these first teeth 21A, and will then destroy the second teeth 21b of each spiral line, and so on.

Figure 4 and 5 can be seen that the peripheral portion of the rim 11 includes, in accordance with one variant of implementation of the invention, two diametrically opposed helical grooves, indicated by the positions 23a and 23b, which open into the chamber 22 against the first two prongs 21A and 21b of the two spiral lines S1 and S2.

In the process of destruction of the safety zone 5 bezel 11 is moved to the right in the drawing, shown in figure 4, and the above-mentioned first teeth 21A, or the so-called guide teeth, two spiral lines S1 and S2 are mentioned spiral grooves 23a and 23b without their destruction. The rim 11 at the first stage of the translational movement is subjected as a consequence, the influence of a torque forces, which ensures the absorption of some energy.

During this movement of the second torsion teeth 21b, then the third teeth and, if necessary, subsequent teeth impinge on the peripheral sector of the rim 11 that is located between the helical grooves 23a and 23b, and are destroyed as a consequence, absorbing some of the energy.

After the rim 11 will overcome distance sufficient to withdraw from engagement with JV the General grooved guides the teeth 21A and 21b, this bezel, under the effect of spring, returns to its original angular position in the cylinder 10, after which it continues its stroke in the direction of the bottom part 13 in the manner described above, exposed to torsion by means of second guide teeth and destroying all crossing his path other teeth.

In accordance with this specific way of performing the rim 11 will then be free to move in the cylinder 10 as a function of direction of the forces acting on the coupling bodies 3 and 4, but the reverse path traversed by this rim 11, will be limited to directing teeth 21A and 21b, which, as it now can be seen in figure 5, serve as limiting stops for the rim 11 in the direction of compression, and these guides are the teeth 21A and 21b in this case we are not against the spiral grooves 23a and 23b.

1. The connecting rod containing the rod (2)having on each end of the connecting body (3, 4) and having a geometric axis passing through both of the connecting body (3, 4), characterized in that the rod (2) contains a safety zone (5) in the form of a zone of reduced cross-section between the first section (6) of the rod (2)connected with the first connecting body (3)and the second section (7) of the rod (2)connected with the second connecting body (4), moreover, the mentioned safety zone (5) is designed to fracture in the event that when the stretching force applied to the aforementioned connecting traction exceeds a predetermined threshold value, and includes means (10, 11, 14), designed to make nereshennymi two sections of the rod (6, 7) in the event of failure of the safety zone (5).

2. Connecting rod according to claim 1, characterized in that the said means are designed to make nereshennymi two sections (6, 7) of the rod (2), contain the cylinder body (10), coaxial with respect to the X-axis and rigidly connected one of its ends (9) with the first section (6) of the rod, and the cylinder body (10) has at the other end of the bottom part (13), which made the hole (14), through which has the ability to slide the second section (7) of the rod, moreover, the above-mentioned body cylinder (10) restricts some cylindrical cavity (15), which is a safety zone (5)and the bezel (11)formed around the second section (7) of the rod and having the ability to slide in a cylindrical cavity (15).

3. Connecting rod according to claim 2, characterized in that it further comprises a mechanical means (21), designed to cushion the impact in the event of failure of the safety zone (5).

4. Connecting rod according to claim 3, characterized in that the said means are designed to amortize the above-mentioned blow, contain a set of teeth (21)formed on the inner wall of the housing cylinder (10) in the annular chamber (22)bounded by a rim (11) and bottom part (13) of the cylinder (10)with the teeth (21) can be destroyed by the rim (11) after there will be destruction of the safety zone (5).

5. Connecting rod according to claim 4, characterized in that it further comprises means designed to prevent movement in the opposite direction of the second section (7) of the rod (2) after the destruction of the safety zone (5).

6. Connecting rod according to claim 5, characterized in that the said means designed to prevent reverse movement of the second section (7) of the rod (2) contain at least one first prong (21A)formed on the inner wall of the housing cylinder (10) against the spiral groove (23a, 23b), performed on the peripheral part of the bezel (11), and the interaction of this first prong (21A) with the said spiral groove (23a, 23b) directly after the destruction of the safety zone (5) causes rotation of at least one of sections (7) of the rod and the first prong (21A) forms a stop designed to prevent the reverse movement of this section of the rod after passing through the first mentioned prong through the bezel (11) in the reverse rotation cited Otago section (7) of the rod under the effect of elasticity.

7. Connecting rod according to any one of claims 4 to 6, characterized in that the teeth (21) are distributed on at least one spiral line (S1, S2).



 

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16 cl, 7 dwg

FIELD: aviation.

SUBSTANCE: proposed aircraft has fuselage, wing, main power plant with two turbo-jet engines 1, auxiliary power plant 2, fin assembly and side air intakes. Power plant 2 includes two supersonic turbo-jet engines 1 which are mounted in widened tail section of fuselage for placing fin assembly root in between them. Auxiliary power plant 2 is located at the bottom of center section of fuselage behind pilot cabin. Inlet openings of air intakes are made under wing and are bounded by fuselage in lower parts. Wing is provided with controllable slotted louvres in upper part of air intakes for air replenishment. Boundary layer drainage slots are made between upper edge of air intakes and lower surface of wing.

EFFECT: enhanced efficiency of multi-purpose supersonic aircraft.

3 cl, 4 dwg

Tailless helicopter // 2243924

FIELD: air transport facilities; helicopters.

SUBSTANCE: proposed helicopter has case and blades located in horizontal plane. Each side surface of helicopter case is provided with blades located in vertical plane parallel to longitudinal axis of helicopter; blades are connected with engine by means of differential gear whose output axles may be braked in turn by crew by means of brake shoes. Helicopter is provided with rack-and-gear mechanism used for control of blades.

EFFECT: enhanced operational reliability; improved speed characteristics.

8 dwg

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