JP3123223U - Rotating gear - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary transmission capable of forward / reverse rotation transmission with a simple configuration and capable of setting a difference in transmission power between forward rotation and reverse rotation.
A ball 12 is sandwiched between a ball guide groove 6M formed on the right end surface of a second rotating body 6 and a ball guide groove 11M formed on a holding plate 11 side. These ball guide grooves 6M and 11M have an arc shape having a certain length, and only one of them has a different depth in the arc direction. Therefore, the movement of the ball 12 when the holding plate 11 rotates in the forward direction and the position of the ball 12 when the holding plate 11 rotates in the reverse direction are different. Differences occur in the transmission rotational force.
[Selection] Figure 1

Description

  The present invention relates to a rotary transmission that can transmit power while adjusting rotational power (torque) from a rotational drive source.

For example, in a steering mechanism that operates the main wing and tail wing of an aircraft with the driving force of an electric motor, the driving force is transmitted to the wing side while adjusting the driving force. However, at this time, a power control mechanism that allows the reverse rotation power while being controlled is adopted (see Patent Document 1). The present invention relates to a rotary transmission useful in such a case.
JP-A-7-71558

In this type of rotary transmission, a brake mechanism is interposed, and the rotational power is adjusted by the function of the brake mechanism. However, the adjustment is limited to the case of forward rotation only. That is, most of the reverse rotation directions are those in which power transmission is performed, and there is nothing in which the brake mechanism functions in either forward or reverse direction.
In particular, in the adjustment of aircraft wings, the rotational force from the driving source and the rotational force from the wing side received by the wind pressure of the wing occur, and the transmission power in the forward and reverse directions is in a complicated state. In addition, in that case, it is required that a difference can be set in the transmission power in the forward direction and in the reverse direction, but there is no rotary transmission that meets such a demand. An object of the present invention is to provide a rotary transmission that meets such demands.

  In order to solve the above-mentioned problem, a rotary transmission provided by the present invention is a first rotating body that is rotatably supported via a bearing, and a rotating body that is separate from the first rotating body. A second rotating body that is rotatably supported via the first rotating body, a brake disc that is displaceably mounted in an axial direction relative to the first rotating body, and an annular fixed frame that is concentric with the first rotating body. A brake mechanism configured to be combined with an annular brake disc that is slidably engaged with the brake disc and is slidably engaged in the axial direction, and is interposed between the axial end of the brake mechanism and the second rotating body, A spring means for urging the sliding contact between the brake disc and the annular brake disc, and a ball interposed between the spring means and the first rotating body and adjusting the elasticity of the spring means by the rotation of the first rotating body. With a cam mechanism, and this The cam-type cam mechanism is composed of an end plate of the second rotating body, an end plate which is joined to the spring means and can be displaced in the axial direction, and a ball which is sandwiched between the both end plates. A ball guide groove for sandwiching the ball is formed in an arc shape, and one of the ball guide grooves is formed so that its depth gradually changes. Therefore, it is possible to set a difference in power transmission by forward / reverse bidirectional rotation transmission.

  With a simple configuration, it is possible to provide a difference in transmission power (torque) in each rotational transmission in the forward and reverse directions.

  The arrangement of the first rotating body and the second rotating body is beneficial because the same axis is simpler. The brake mechanism is desirably a brake disc type, and a ball type cam mechanism is desirable for adjusting the braking force.

A first embodiment shown in FIGS. 1 and 2 according to the present invention will be described below.
FIG. 1 is a view showing a longitudinal section of a rotary transmission RT according to the present invention. The illustrated embodiment is a rotary transmission machine RT housed in a housing 1 so that the first rotating body 5 and the second rotating body 6 can be rotated in the housing 1 via bearings 2, 3, 4. It is supported. That is, the first rotating body 5 is provided with splines 51S and 52S, and the annular body 5K is fixed to the spline 52S. The annular body 5 </ b> K is rotatably supported on the left side of the first rotating body 5 with respect to the housing 1 via the bearing 2. Reference numeral 1C denotes a housing cover.

On the other hand, the right end of the first rotating body 5 is rotatably supported by the housing cover 1 </ b> C via the bearing 3. A gear 5G is fixed to the spline 51S at the left end of the first rotating body 5. A rotation drive gear (not shown) is engaged with the gear 5G, and rotational power is input from the rotation drive gear, or conversely, rotation of the first rotation body 5 is performed via the rotation drive gear. To be communicated to.
On the other hand, the second rotator is indicated by reference numeral 6, but is disposed on the same axis as the first rotator 5, and at the right position of the first rotator 5 via the bearing 4 on the outer periphery thereof. And can be rotated. 6G is a gear provided on the outer periphery of the second rotating body 6 and is transmitted to the outside through a gear (not shown) or the rotational power from the outside is supplied to the second rotation through the gear (not shown). In some cases, a gear is input to the body 6.

In the above configuration, the rotary transmission RT provided by the present invention is provided with a brake mechanism for adjusting transmission of rotational power between the first rotary body 5 and the annular body 5K and the second rotary body 6. However, this brake mechanism will be described in detail below. As shown in FIG. 1, the spline 52 </ b> S is formed on the outer periphery of the first rotating body 5 as described above, but the spline 1 </ b> S is also formed on the annular inner peripheral surface of the housing 1. A plurality of brake discs 9 (seven in the illustrated example) engage with the spline 52S on the outer periphery of the first rotating body 5 and can be displaced in the axial direction. It is locked to prevent relative rotation.
On the other hand, a plurality of annular brake boards 10 (six in the illustrated example) are engaged with the splines 1S provided on the inner peripheral surface of the housing 1. The annular brake disc 10 is also displaceable in the axial direction but is combined so as not to rotate. Moreover, as shown in FIG. 1, the brake disc 9 and the annular brake disc 10 are alternately overlapped, joined, It is configured to be in sliding contact.

Therefore, in the combination of the plurality of brake discs 9 and the annular brake disc 10, the brake (braking) functions if they are urged to each other and the degree of joining is increased, and conversely, if the urging force is weakened, the brake does not act.
In the present invention, the brake mechanism is interposed between the annular body 5K and the second rotating body 6, and more specifically, between the left end surface of the second rotating body 6 and the holding plate 11. A cam mechanism having a pinched ball 12 as a main element, a disc spring 8 that exerts an urging force in the axial direction, and a sliding ring 7 that is engaged with the disc spring 8 and an annular body 5K. Yes.
According to this configuration, the disc spring 8 is an elastic body and is interposed as a compression spring. The disc spring 8 is energized via the sliding ring 7 so that the brake discs 9 and the annular brake disc 10 of the brake mechanism are slidably contacted with each other. To function. That is, a constant braking force is applied. This means that the rotation of the first rotating body 5 is transmitted to the second rotating body 6 while receiving a constant braking force.

The rotary power transmission RT of the present invention is characterized by a ball cam mechanism using the balls 12 in the configuration described above.
In this ball type cam mechanism, the ball 12 is sandwiched between a ball guide groove 6M formed on the right end surface of the second rotating body 6 and a ball guide groove 11M formed on the holding plate 11 side. These ball guide grooves 6M and 11M have a circular arc shape having a certain length, and in the illustrated example, the ball guide groove 6M on the second rotating body 6 side is deep in the arc direction as shown in FIG. Are different. The other ball guide groove 11M has a constant depth in the arc direction.

  FIG. 2 is a cross-sectional view of the ball-type cam mechanism in the direction of the ball guide grooves 6M and 11M with the ball 12 as the center. FIG. 2A is a diagram showing the movement of the ball 12 when the holding plate 11 of the first rotating body 5 rotates in the forward direction (upward in the figure), while FIG. 2B shows the movement of the holding plate 11 in the reverse direction. The position of the ball 12 when rotated in the downward direction (shown in the drawing) is shown. As shown in FIGS. 2A and 2B, the ball guide groove 6M is shown in FIG. 2A when the rotation direction of the first rotating body 5 is the forward direction and FIG. 2B when the rotation direction is the reverse rotation direction. The distance between the second rotating body 6 and the holding plate 11 differs from the position of the ball 12 due to the different depth of the 11M grooves. That is, the case of FIG. 2B is larger than the case of FIG. 2A. Therefore, in the case of FIG. 2B, the holding plate 11 is displaced more to the left in FIG. The disc spring 8 is compressed more greatly. Therefore, in the case of FIG. 2B, the braking force by the brake mechanism becomes larger.

As described in detail above, the present invention is characterized by a ball-type cam mechanism in a rotary transmission capable of controlling the rotational transmission power by a so-called brake disk system, that is, by making a difference in the cam groove depth and performing normal rotation. This is characterized in that a difference is caused in the power transmission in the case of reverse rotation.
However, the embodiment according to the present invention is not limited to the above and illustrated examples, and includes various modified embodiments. In the illustrated example, the first rotating body 5 and the second rotating body 6 are arranged coaxially, and an example in which the configuration is simplified and miniaturized is shown. However, the present invention is not limited to the above and illustrated examples. It is not intended to include various modifications. For example, although it is a way of arrangement | positioning of the above-mentioned 1st rotary body 5 and the 2nd rotary body 6, it is not concentric but can also be arranged in parallel up and down. Further, both the rotary bodies 5 and 6 have gears 5G and 6G at their respective end portions and are of a type that rotates and transmits by gear transmission, but it is also possible to adopt a pulley system instead of the gears. In the illustrated example, the rotary power transmission RT is installed in the housing 1 and the housing cover 1C, but it may be installed on a single machine base instead of the housing. Although the example using the disc spring 8 as an elastic means was shown, it is also possible to employ a coiled compression spring. The present invention includes all of these.

It is a figure which shows the structure of the rotary transmission by this invention in the longitudinal cross-section. It is sectional drawing which expands and shows the principal part of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Case 1C Case cover 1S Spline 2 Bearing 3 Bearing 4 Bearing 5 1st rotary body 5G Gear 5K Annular body 51S Spline 52S Spline 6 2nd rotary body 6G Gear 6M Ball guide groove 7 Slide ring 8 Disc spring 9 Brake disc 10 Ring brake board 11 Holding board 11M Ball guide groove 12 Ball RT Rotating transmission

Claims (2)

  A first rotating body rotatably supported via a bearing, a second rotating body separately from the first rotating body and rotatably supported via a bearing, and the first rotating body. A brake disc that is mounted so as to be displaceable in the axial direction relative to the rotating body, and an annular shape that is slidably engaged with the brake disc and that is displaceably engaged in the axial direction with respect to an annular fixed frame that is concentric with the first rotating body A brake mechanism configured by combining a brake disc, and spring means interposed between an axial end of the brake mechanism and the second rotating body and biasing the sliding contact between the brake disc and the annular brake disc; And a ball type cam mechanism that is interposed between the spring means and the first rotating body and adjusts the elasticity of the spring means by the rotation of the first rotating body. The ball type cam mechanism is configured to perform the second rotation. Can be displaced in the axial direction by joining the end plate of the body and the spring means It is composed of an end plate and a ball sandwiched between both end plates. A ball guide groove for sandwiching the ball is formed in an arc shape on the both end plates, and one ball guide groove gradually increases in depth. A rotary transmission characterized in that a difference occurs in torque transmission to the second rotating body in the direction opposite to the forward direction when the first rotating body is rotated in the forward and reverse directions.   The rotary transmission according to claim 1, wherein the second rotating body is disposed coaxially with the first rotating body.

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