JP6476387B2 - Redundant rotation support structure of actuator - Google Patents

Description

  The present invention relates to a redundant rotation support structure for an actuator, and in particular, by providing a redundant structure for a flange that rotatably supports a shaft, the rotation of the shaft can be maintained even when one flange is damaged. Regarding new improvements.

As this type of rotation support structure that has been conventionally used, for example, the structure disclosed in Patent Document 1 can be disclosed as FIGS. 2 and 3.
In other words, reference numeral 7 denotes a pair of sleeve bearings for supporting the rotating shaft 1, and in this embodiment, it is divided into two halves 7a and 7b in the radial direction as shown in FIG. An appropriate gap 8 is usually formed between the rotary shaft 1 and the sleeve bearing 7. Reference numeral 9 denotes a housing for holding the sleeve bearing 7, and a gap portion 10 is provided between the housing 9 and the sleeve bearing 7. Reference numeral 11 denotes an anti-rotation pin inserted and fixed in the hole 12 of the sleeve bearing 7. The protruding end 10a of the pin 11 is inserted and engaged with the guide groove 13 of the housing 9 as shown in FIG. . Reference numeral 14 denotes an elastic body such as a foil-like (very thin stainless steel plate) spring, which is elastically mounted in the gap 10 between the housing 9 and the sleeve bearing 7, and this elastic body 14 is curled around the inner winding. Therefore, the elastic body 14 is wound on the outer periphery of the sleeve bearing 7 over almost the entire circumference, and the sleeve bearing 7 is wound around the rotary shaft 1 by this elastic force. FIG. 3 is a development view of the elastic body 14 which is a component of the embodiment of FIG. 1. The elastic body 14 has a convex portion 14a that mainly generates elastic force and a hole 14b for inserting the pin 11 described above. Is provided.

Next, the operation will be described. The sleeve bearing 7 is divided into two parts 7 a and 7 b, and a gap 10 in which an elastic body 14 is interposed between the sleeve bearing 7 and the housing 9 and a gap 8 is provided between the sleeve bearing 7 and the rotary shaft 1. Therefore, the rotary shaft 1 can freely follow the radial movement or inclination within the gaps 8 and 10. On the other hand, the sleeve bearing 7 is pressed against the rotary shaft 1 with a predetermined pressure by the elastic force of the foil-like elastic body 14 elastically mounted in the gap 10 between the housing 9 and the sleeve bearing 7. The axis 7 is always automatically aligned with the axis of the rotating shaft 1 and vibrations are also suppressed, so that the rotating shaft 1 can be supported stably without causing abnormal wear or seizure. Moreover, since the elastic member 14 is wound around the entire circumference substantially on the outer periphery of the sleeve bearing 7, since uniform elastic force is applied from the entire circumference in the sleeve bearing 7 which is divided into two parts, the sleeve bearing 7 Even when worn, the axis of the rotary shaft 1 can be kept constant at all times. Further, the pin 11 is inserted and fixed in the hole 12 of the sleeve bearing 7, and the protruding end 11 a of the pin 11 is inserted and engaged with the guide groove 13 of the housing 9. The sleeve bearing 7 does not rotate.

Japanese Utility Model Publication No. 5-45844

Conventionally, the shaft support device that has been used has been configured as described above, and the following problems exist.
That is, in the aircraft, redundancy for the structure and function is essential from the viewpoint of reliability, but the conventional configuration of FIGS. 2 and 3 is configured with a strong bearing structure, but is not a redundant system. Therefore, it could not be used for aircraft actuators.

In addition to the shaft support device shown in FIGS. 2 and 3, the literature name is not disclosed as a bearing for an actuator of an aircraft, but variously developed and adopted.
In the above-mentioned redundant bearing structure, even if the support structure constitutes a redundant system, the parts of the rotation support part are fixed to the same fixed member. As a result, there were cases where it became a serious dysfunction for aircraft actuators.

  The present invention has been made to solve the above-described problems. In particular, by providing a redundant structure for the flange that rotatably supports the shaft, the shaft can be rotated even when one of the flanges is damaged. It is an object of the present invention to provide a redundant rotation support structure for an actuator that can be maintained.

Since the redundant rotation support structure of the actuator according to the present invention is configured as described above, the following effects can be obtained.
That is, an inner shaft that is rotatably provided in the inner housing, an outer shaft that is coaxially disposed on the outer periphery of the inner shaft and has a cylindrical shape, and that is provided outside the inner housing and rotatably supports the outer shaft. An outer housing, an inner flange and an outer flange provided on an outer periphery of the outer shaft via a ring-shaped bush, a first structure for fixing the inner flange, and a first structure for fixing the outer flange. A second structure that is independent from one structure, and either one of the inner flange and the outer flange or one of the first structure and the second structure is damaged. However, the inner shaft and outer shaft can maintain the rotation function. The inner flange and the outer flange are provided in contact with each other, the first flange provided at the tip of the inner shaft, and the outer shaft A second flange provided at the tip of the inner flange, wherein the first flange and the second flange are superposed with each other along the axial direction A of the inner shaft , and the annular bush is The U-shaped section is formed by juxtaposing the L-shaped first section and the second L-shaped section having an L shape in the axial section along the axial direction A, and the inner flange. The 1st hole inner surface of the 1st hole formed in this and the 2nd hole inner surface of the 2nd hole formed in the said outer flange are the structures which are in contact with the outer peripheral surface of the said ring-shaped bush.

Since the redundant rotation support structure of the actuator according to the present invention is configured as described above, the following effects can be obtained.
That is, an inner shaft that is rotatably provided in the inner housing, an outer shaft that is coaxially disposed on the outer periphery of the inner shaft and has a cylindrical shape, and that is provided outside the inner housing and rotatably supports the outer shaft. An outer housing, an inner flange and an outer flange provided on an outer periphery of the outer shaft via a ring-shaped bush, a first structure for fixing the inner flange, and a first structure for fixing the outer flange. A second structure that is independent from one structure, and either one of the inner flange and the outer flange or one of the first structure and the second structure is damaged. However, the inner shaft and outer shaft can maintain the rotation function. By being configured in so that, for example, it is possible to one flange side even when corrupted with structure, to maintain the redundancy function, which greatly contributes to safety.
In addition, since the inner flange and the outer flange are provided in contact with each other, each flange can improve the rigidity under normal conditions.
A first flange provided at a tip of the inner shaft; and a second flange provided at a tip of the outer shaft, wherein the first flange and the second flange are in an axial direction of the inner shaft. By being superposed on each other along A , the rotational rigidity of each shaft can be improved.
The ring-shaped bush has a U-shaped section by arranging a first L-shaped section and a second L-shaped section that are L-shaped in an axial section along the axial direction A. The first hole inner surface of the first hole formed in the inner flange and the second hole inner surface of the second hole formed in the outer flange are in contact with the outer peripheral surface of the annular bush, Each cross-section L-shaped portion constituting the ring-shaped bush is accommodated in each hole of the inner flange and the outer flange, so that the shafts can be completely supported by the inner flange and the outer flange.

It is a cross-sectional block diagram which shows the redundant rotation support structure of the actuator by this invention. It is sectional drawing which shows the support structure of the conventional axis | shaft. FIG. 3 is a cross-sectional view of FIG. 2.

  The redundant rotation support structure of the actuator according to the present invention is to make it possible to maintain the rotation of the shaft even when one of the flanges is damaged by making the flange for rotatably supporting the shaft a redundant structure.

A preferred embodiment of a redundant rotation support structure for an actuator according to the present invention will be described below with reference to the drawings.
Note that the same or equivalent parts as in the conventional example will be described using the same reference numerals.
In FIG. 1, what is indicated by reference numeral 9 is an outer housing, and a cylindrical outer shaft 20 having a second flange 20a is rotatably provided in the first holding hole 9a of the outer housing 9. Yes.

A cylindrical inner housing 21 is provided inside the first holding hole 9 a of the outer housing 9, and one end 1 a of the inner shaft 1 that is coaxially inserted into the outer shaft 20 is provided in the inner shaft 21. It is inserted into the inner housing 21.

The first flange 1b of the inner shaft 1 and the second flange 20a of the outer shaft 20 are in contact with each other and overlap each other along the axial direction A of the inner shaft 1 .
A ring-shaped bush 30 having a U-shaped cross section is provided on the outer periphery of the outer shaft 20 while being sandwiched between the second flange 20 a and the outer housing 9.

The annular bush (30) is composed of a U-shaped section 31 having an overall U-shaped cross section, and the annular bush 30 is made of a metal such as stainless steel.
The U-shaped section 31 of the ring-shaped bush 30 includes a first section L-shaped section 30A and a second section L-shaped section 30B, and the outer peripheral surface 31a forming the recessed section of the ring-shaped bush 30 is an inner surface. The flange 40 and the outer flange 41 are inserted and positioned in the first hole 40a and the second hole 41a.

  The first hole inner surface 40aA of the first hole 40a of the inner flange 40 is in sliding contact with the outer peripheral surface 31a of the second L-shaped section 30B, and the second hole inner surface of the second hole 41a of the outer flange 41. 41aA is in sliding contact with the outer peripheral surface 31a of the first section L-shaped portion 30A, so that the inner shaft 1, the outer shaft 20 and the annular bush 30 rotate with respect to the inner flange 40 and the outer flange 41. The driven member (not shown) and the inner shaft 1 can be coupled by the hole 50 formed in the inner shaft 1 so that the driven member can be rotationally driven. .

  The inner flange 40 is fixed to an independent first structure 61 such as an airplane to which the redundant rotation support structure 60 for an actuator according to the present invention is attached by a plurality of inner bolts 62, and the outer flange 40 is a redundant rotation support for the actuator. A plurality of outer bolts 64 are fixed to an independent second structure 63 such as an airplane to which the structure 60 is attached.

  When the inner flange 40 and the outer flange 41 are slidably attached to the outer peripheral surface 31 a of the ring-shaped bush 30, the inner flange 40 and the outer flange 41 are connected when the ring-shaped bush 30 has a U-shaped section 31. Since it is impossible to insert the outer flange 31a into the outer peripheral surface 31a, first, the inner flange 40 and the outer flange 41 are in contact with each other as shown in FIG. When the second cross-sectional L-shaped portion 30B of the annular bush 30 is fitted into the one hole 40a, and the first cross-sectional L-shaped portion 30A of the annular bush 30 is fitted into the second hole 41a of the outer flange 41, The flanges 40 and 41 and the ring-shaped bush 30 are configured to be slidably rotatable with respect to each other.

  In the above-described configuration, the outer shaft 20 configured coaxially and integrally with the inner shaft 1 is inserted into the bush hole 30C of the ring-shaped bush 30 so that the inner and outer flanges 40 and 41 are inserted. The inner shaft 1 and the outer shaft 20 are configured to be rotatable with respect to the inner and outer flanges 41 via the ring-shaped bush 30.

The gist of the redundant rotation support structure for an actuator according to the present invention is as follows.
That is, the inner shaft 1 rotatably provided in the inner housing 21, the the outer over shaft 20 coaxially disposed cylindrical on the outer periphery of the inner shaft 1, the outer shaft 20 provided outside the inner housing 21 An outer housing 9 for rotatably supporting the inner flange 40, an outer flange 41 provided on the outer periphery of the outer shaft 20 via a ring-shaped bush 30 and an outer flange 41, and a first structure for fixing the inner flange 40. A body 61 and a second structure 63 independent of the first structure 61 for fixing the outer flange 41, and either one of the inner flange 40 and the outer flange 41, or Either the first structure 61 or the second structure 63 is damaged. Even in such a case, the inner shaft 1 and the outer shaft 20 are configured to be able to maintain a rotating function, and the inner flange 40 and the outer flange 41 are configured to be in contact with each other. The first flange 1b provided at the tip of the inner shaft 1 and the second flange 20a provided at the tip of the outer shaft 20 are provided, and the first flange 1b and the second flange 20a are the a configuration are polymerized with each other along the axial direction a of the inner shaft 1, also the annular bushing 30 has a first L-shaped section portion 30A and the second section forms an L-shape in axial section The L-shaped part 30 </ b> B is arranged along the axial direction A to form a U-shaped section 31, which is formed on the inner flange 40. The second hole inner surface 41aA of the second hole 41a formed in the outer flange 41 and the first hole inner surface 40aA of the first hole 40a, a structure that is in contact with the outer peripheral surface 31a of the annular bushing 30.

  In the redundant rotation support structure of the actuator according to the present invention, the redundant inner flange and outer flange for supporting the inner shaft and the outer shaft via the bush are provided in the first structure and the second structure which are independent from each other. Therefore, normal rotation can be maintained by the other with respect to one breakage, and the reliability of the redundant system can be greatly improved.

DESCRIPTION OF SYMBOLS 1 Inner shaft 1a One end 1b 1st flange 9 Outer housing 9a 1st holding hole 20 Outer shaft 20a 2nd flange 21 Inner housing 30 Ring-shaped bush 30A 1st cross-section L-shaped part 30B 2nd cross-sectional L-shaped part 30C Bush hole 31 U-shaped section 31a Outer peripheral surface 40 Inner flange 40a First hole 40aA First hole inner surface 41 Outer flange 41a Second hole 41aA Second hole inner surface 50 hole 60 Redundant rotation support structure of actuator 61 First structure 62 Inner bolt 63 Second structure 64 Outer bolt
A Axial direction of inner shaft

Claims (4)

An inner housing inner shaft rotatably provided in (21) (1), wherein an outer peripheral coaxial disposed outer over shaft forms a cylindrical shape of the inner shaft (1) (20), said inner housing (21) An outer housing (9) provided on the outer side for rotatably supporting the outer shaft (20), and an inner flange (40) provided on the outer periphery of the outer shaft (20) via a ring-shaped bush (30) And the outer flange (41), the first structure (61) for fixing the inner flange (40), and the first structure for fixing the outer flange (41) are independent from each other. A second structure,
Even if one of the inner flange (40) and the outer flange (41) or one of the first structure (61) and the second structure (63) is damaged, the inner shaft (1 ) And the outer shaft (20) are configured so as to be able to maintain a rotation function.   The redundant rotation support structure for an actuator according to claim 1, wherein the inner flange (40) and the outer flange (41) are provided in contact with each other. A first flange (1b) provided at the tip of the inner shaft (1), and a second flange (20a) provided at the tip of the outer shaft (20),
The actuator according to claim 1 or 2, wherein the first flange (1b) and the second flange (20a) overlap each other along the axial direction (A) of the inner shaft (1). Redundant rotation support structure. The ring-shaped bush (30) includes a first cross-section L-shaped portion (30A) and a second cross-section L-shaped portion (30B), which are L-shaped in the axial cross section, along the axial direction (A). As a result, a U-shaped section (31) is formed, and the inner surface (40aA) of the first hole (40a) formed in the inner flange (40) and the outer flange (41) are formed. The redundant rotation support structure for an actuator according to claim 3 , wherein the second hole inner surface (41aA) of the second hole (41a) is in contact with the outer peripheral surface (31a) of the annular bush (30). .

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