JP2010054327A - Rotational angle sensor structure having axis center position returning mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically return a detection shaft and a first lever after rotation to the center position, namely the home position, by a center-returning mechanism provided in the detection shaft of a rotational angle sensor. <P>SOLUTION: The rotational angle sensor structure having an axis center position returning mechanism includes the detection shaft (5) rotatably provided in a casing (1) via bearings (2, 3); a rotational angle sensor (20) for detecting a rotational angle, in linking with the rotation of the detection shaft (5); and a center returning mechanism (10) provided at the side of an edge (5aA) of the detection shaft (5). After rotating the detection shaft (5), the detection shaft (5) and the first lever (11) are made to return to a center position (C) by the center-returning mechanism (10). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a rotation angle sensor structure with a shaft center position return mechanism, and in particular, the center return mechanism provided on the detection shaft of the rotation angle sensor moves the detection shaft and the first lever after rotation to the original center position, that is, the origin position. To a new improvement to automatically revert to

  Conventionally, this type of resolver or encoder, which has been used in the past, is widely used in aircraft, and is disclosed in, for example, Patent Documents 1 and 2, both of which are based on the original center position, that is, the origin position. There is no mechanism for returning to.

US Pat. No. 6,750,577B2 specification Japanese Utility Model Publication No. 5-3919

Since the conventional rotation angle sensor is configured as described above, the following problems exist.
That is, the rotation axis is not provided with a return mechanism for returning automatically to the original center position after rotation, that is, the rotation angle sensor to return to the original origin position (0 ° position). For example, when the rotating shaft is locked due to a failure of a bearing or the like, or when the rotating shaft is broken, the rotating shaft cannot return to the original center position, so that detection data as it is rotated is output. Thus, an abnormal signal is detected, which may cause troubles such as aircraft.

  A rotation angle sensor structure with a shaft center position return mechanism according to the present invention includes a detection shaft that is rotatably provided on a casing via a bearing, detects a rotation angle in conjunction with rotation of the detection shaft, and is installed in the casing. A rotation angle sensor provided; and a central return mechanism provided on an end side of the detection shaft, wherein the central return mechanism is fixed to the detection shaft and includes a first lever having a pin; and the detection shaft A pair of second and third levers that are loosely fitted to each other, and a tension spring provided between the first ends of the second and third levers, the detection shaft and The first lever rotates against the spring force of the tension spring through the pin, and the detection shaft and the first lever are moved to the center position of the first lever through the pin by the spring force of the tension spring. And the above times. The angle sensor includes a rotor provided on the detection shaft and a stator provided on the casing and corresponding to the rotor, and the rotation angle sensor is a rotation gear provided on the detection shaft. A plurality of first and second rotation angle sensor portions provided in the casing, and first and second gears connected to the first and second rotation shafts of the rotation angle sensor portions and meshing with the rotation gear. Each rotation angle sensor part that forms a redundant system by rotation of the detection shaft, and a plurality of the central return mechanisms are provided on the detection shaft. This is a redundant system configuration.

Since the rotation angle sensor structure with the shaft center position return mechanism according to the present invention is configured as described above, the following effects can be obtained.
That is, a detection shaft that is rotatably provided on the casing via a bearing, a rotation angle sensor that detects a rotation angle in conjunction with rotation of the detection shaft, and an end of the detection shaft A central return mechanism provided on the part side, the central return mechanism comprising a first lever fixed to the detection shaft and having a pin, and a pair of loosely fitted to the detection shaft and sandwiching the pin And a tension spring provided between the first ends of the second and third levers, and the detection shaft and the first lever are connected to the tension spring via the pin. By rotating against the spring force, the detection shaft and the first lever return to the center position of the first lever via the pin by the spring force of the tension spring, so that the bearing or the detection shaft is damaged. Even if it occurs, the detection axis is Returning to the position, can be prevented from continuously generated erroneous detection data, it is possible to prevent abnormal signal detection.
In addition, the rotation angle sensor includes a rotor provided on the detection shaft and a stator provided on the casing and corresponding to the rotor, thereby obtaining a small rotation angle sensor having a center position return mechanism. Can do.
The rotation angle sensor includes a rotation gear provided on the detection shaft, a plurality of first and second rotation angle sensor units provided in the casing, and a first and a second of the rotation angle sensor units. The first and second driven gears connected to the two rotation shafts and meshed with the rotation gears, and the rotation angle sensor portions forming a redundant system by the rotation of the detection shaft rotate in conjunction with each other, thereby reducing the size. Thus, a redundant rotation angle sensor can be obtained.
Further, a plurality of central return mechanisms are provided on the detection shaft to form a redundant system, whereby a redundant central return mechanism can be obtained.

  The present invention includes a shaft center position return mechanism that automatically returns the rotated detection shaft and the first lever to the original center position, that is, the origin position, by a center return mechanism provided on the detection shaft of the rotation angle sensor. An object of the present invention is to provide a rotation angle sensor structure.

A preferred embodiment of a rotation angle sensor structure with a shaft center position return mechanism according to the present invention will be described below with reference to the drawings.
A reference numeral 1 in FIG. 1 is a casing, and a detection shaft 5 having a rotor 4 is rotatably provided between a pair of bearings 2 and 3 provided in the casing 1.

  A stator 6 corresponding to the rotor 4 is provided on the inner surface 1a of the casing 1, and a protruding shaft portion 5a of the detection shaft 5 protruding outward from the bearing 3 is shown in FIGS. A central return mechanism 10 is provided.

  As shown in FIGS. 3 and 4, the central return mechanism 10 includes a first lever 11 fixed to the end 5 a A of the protruding shaft 5 a of the detection shaft 5, and the first lever 11. Provided at the tip 11a (corresponding to the lower end in FIGS. 3 and 4), a pin 12 protruding inward along the axial direction and a pair of second loosely fitted on the outer periphery of the detection shaft 5 The third levers 13 and 14 and the tension springs 15 provided between the first end portions 13a and 14a located at the top of the second and third levers 13 and 14 in the drawing.

  Lever tips 13b, 14b located in the lower part of the drawings of the second and third levers 13, 14 are drawn by the first end portions 14a, 13a being pulled inward by the tension spring 15 as indicated by the arrow A. The lever tips 13b and 14b are moved inward as indicated by an arrow B so that the pin 12 can be clamped from both sides by the lever tips 13b and 14b.

  The second and third levers 13 and 14 are substantially L-shaped as a whole, and the protruding shaft portion 5a of the detection shaft 5 is formed in a holding hole 16 formed at a substantially central position of the levers 13 and 14. By penetrating, the levers 13 and 14 are rotatably provided in a state of being superimposed on the first lever 11.

  In the configuration described above, the detection shaft 5 in FIG. 1 is connected to a detected member (not shown) that rotates at a finite angle, such as an aircraft flap, and is detected in conjunction with the rotation of the detected member. The shaft 5 and the first lever 11 rotate in either the left or right direction.

  The rotation angle of the detection shaft 5 described above is detected by a rotation angle sensor 20 including the rotor 4 and the stator 6, and rotation angle detection data is transmitted to a control system (not shown).

  In the above case, the pin 12 of the first lever 11 that rotates together with the detection shaft 5 rotates the second lever 13 or the third lever 14 against the spring force of the tension spring 15 to detect the detection shaft. Therefore, when the rotation of the detected shaft ends and returns to the original position, the levers 13 and 14 are moved to the original central position C (that is, the detection shaft 5 and the first shaft by the spring force of the tension spring 15). 1 to return to the original position of the lever 11), the pin 12 is pushed back by the levers 13 and 14, so that the detection shaft 5 also returns to the central position C, and the rotation angle sensor 20 detects 0 °. Detection data indicating the angle is obtained.

Further, when the rotation angle is detected, for example, when the bearings 2 and 3 or the detection shaft 5 are damaged, the first lever 11 is caused by the strong spring force of the tension spring 15 of the central return mechanism 10. And the detection shaft 5 is returned to the state of the center position C through the pin 12 and output of detection data of an erroneous rotation angle position can be prevented.
Although only one central return mechanism 10 is shown in FIG. 1, for example, a redundant system of the central return mechanism 10 can be configured by arranging a plurality of central return mechanisms 10 on the protruding shaft portion 5a.

Further, the configuration shown in FIG. 2 is another form of FIG. 1, and a redundant system of the rotation angle sensor 20 and the central return mechanism 10 can be configured.
That is, in FIG. 2, the same reference numerals are given to the same or equivalent parts as in FIG.
In FIG. 2, a rotation gear 30 provided adjacent to the bearing 3 of the detection shaft 5 has a pair of first and second rotation angle sensors fixedly disposed at positions outside the detection shaft 5 in the casing 1. The first and second driven gears 33 and 34 of the first and second rotating shafts 31 and 32 of the parts 20A and 20B (for example, a pair or more are also possible) are meshed.

Although the rotation angle sensor 20 is configured by the first and second rotation angle sensor units 20A and 20B, the number of the rotation angle sensor units 20A and 20B is not limited to a pair, and may be a pair or more.
A plurality (n) of the central return mechanisms 10 are provided on the protruding shaft portion 5a of the detection shaft 5, and a redundant system of the central return mechanisms 10 is obtained.

  In the configuration of FIG. 2 described above, when the detection shaft 5 is connected to a rotating member (not shown) such as an aircraft flap and the detection shaft 5 is rotated, the rotation gear 30 and each driven gear 33, The rotation angle sensor units 20A and 20B are simultaneously rotated by the same amount via 34, and the detection data of the rotation angle of the detection shaft 5 is input to the control system (not shown) as a redundant system from each rotation angle sensor unit 20A and 20B. Is done.

In the rotation angle detection operation of the detection shaft 5 described above, each of the central return mechanisms 10 performs the same operation as that described above, but, for example, the bearing 2, 3 or the detection shaft 5 is damaged. In this case, the detection shaft 5 is returned to the center position C by the strong spring force of the tension spring 15 of each center return mechanism 10, and output of detection data of an erroneous rotation angle position can be prevented.
Therefore, in the above-described case, since the redundant system is provided with a plurality of the central return mechanisms 10, for example, even when one central return mechanism 10 is broken or damaged, it is detected by the other central return mechanisms 10. The shaft 5 is reliably returned to the center position C.

It is a block diagram which shows the rotation angle sensor structure with an axial center position return mechanism by this invention. It is a block diagram which shows the other form of FIG. It is a side view which shows the center return mechanism of FIG. FIG. 4 is a perspective view of FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2, 3 Bearing 4 Rotor 5 Detection shaft 5a Projection shaft part 5aA End part 6 Stator 10 Center return mechanism 11 1st lever 11a Tip 12 Pin 13 2nd lever 14 3rd lever 13a, 14a 1st end part 13b, 14b Lever tip 15 Tension spring 16 Holding hole 20 Rotation angle sensor 20A, 20B First and second rotation angle sensor unit 30 Rotating gear 31, 32 First, second rotating shaft 33, 34 First, second driven gear

Claims (4)

A detection shaft (5) rotatably provided on the casing (1) via bearings (2, 3), and a rotation angle in conjunction with rotation of the detection shaft (5) and the casing (1) A rotation angle sensor (20) provided inside, and a central return mechanism (10) provided on the end (5aA) side of the detection shaft (5),
The central return mechanism (10) is fixed to the detection shaft (5) and has a pin (12), and the first lever (11) is loosely fitted to the detection shaft (5) and holds the pin (12). Tension springs (15) provided between a pair of second and third levers (13, 14) and first ends (13a, 14a) of the second and third levers (13, 14) And comprising
The detection shaft (5) and the first lever (11) rotate against the spring force of the tension spring (15) via the pin (12), and the detection shaft (5) and the first lever ( 11) is a rotation angle sensor with a shaft center position return mechanism that returns to the center position (C) of the first lever (11) via the pin (12) by the spring force of the tension spring (15). Construction.   The rotation angle sensor (20) includes a rotor (4) provided on the detection shaft (5), and a stator (6) provided on the casing (1) and corresponding to the rotor (4). The rotation angle sensor structure with a shaft center position return mechanism according to claim 1.   The rotation angle sensor (20) includes a rotation gear (30) provided on the detection shaft (5) and a plurality of first and second rotation angle sensor units (20A, 20A, 20) provided in the casing (1). 20B) and the first and second driven gears (33, 32) connected to the first and second rotation shafts (31, 32) of the rotation angle sensor units (20A, 20B) and meshing with the rotation gear (30). The shaft according to claim 1 or 2, wherein each rotation angle sensor section (20A, 20B) forming a redundant system is rotated in conjunction with rotation of the detection shaft (5). Rotation angle sensor structure with central position return mechanism.   The rotation with shaft center position return mechanism according to any one of claims 1 to 3, wherein a plurality of the center return mechanisms (10) are provided on the detection shaft (5) to form a redundant system. Angle sensor structure.

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