JPH0454314A - Rotation transmitting device equipped with torque limitation - Google Patents

Abstract

PURPOSE:To cause slipping under a load torque exceeding a predetermined value by providing a first and a second rolling bodies to contact a first and a second rotary part having holes in their surfaces facing each other at holes respectively, and providing a pressure body to transmit rotation through the bodies. CONSTITUTION:A hole 114h is provided on a flange 114 connected with a shaft 112 by a key 115, a first rolling body 117a is disposed, a hole 11 6a is provided at the center of a gear 116 for a cylinder part 114c of the flange 114 to be engaged, and it is supported rotatably. A hole of a little larger diameter than the second rolling body 117b is provided at a position of the gear 116 corresponding to the first rolling body 117a, and a second rolling body 117b engaged is pressed against the first rolling body 117a through a washer 18, a plate spring 20, a spring bearing 121, and an adjusting screw 122. The rolling bodies 117a, 117b therefore slip above the limit value to stop transmission of rotation, thereby the transmission torque can be limited attaining long life.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a rotation transmission device with torque limitation, which prevents transmission of rotation when a load exceeding a predetermined value is applied.

[Prior Art] Figs. 5 to 8 show a control mechanism section of an aircraft that exchanges electrical commands into actual movement of the mechanism section.

5 is a front view, and FIG. 6 is a V in FIG. 5. FIG.
I-VI partial sectional view; FIG. 7 is a partial sectional view showing an enlarged portion of the rotation transmission device with torque limitation in FIG. 6;
FIG. 8 is a sectional view taken along the line -■ in FIG. 7.

In FIG. 5, (1) is a torque limiter housing that covers the rotation transmission device, (2) is a housing of the reduction unit, and (3) is a set screw that fixes the housing (1) to the housing (2).

In Fig. 6, (4) is a plate, and (5) is a set screw that fixes the housing (2) to the plate (4).

(6) is a motor supported by plate (4), (6
a) is a screw that fixes the motor (6) to the plate (4);
(6b) is a geared rotating shaft of the motor (6), (7) is a gear that meshes with the geared rotating shaft (6b) and rotates as a result of the motor (6), and (8) rotates together with the gear (7). shaft.

(9) is the bearing of the shaft (8), and the housing (
2) and the plate (4). (10)
is a gear that rotates together with the shaft (8), (111 is a gear that rotates driven by gear (10), (12) is a shaft that rotates together with gear (11), (13) is a bearing for the shaft (12), and housing (2) and plate (4).

(14) is the first rotating part 2, for example, a flange, (151
A key is mounted in a recess (12a) provided in the shaft (12) and has a protrusion (15a) that partially protrudes outside the outer diameter of the shaft (12).

The flange (14) has a hole [14a) in the center into which the shaft (12) is fitted, and holes f14b) provided at equal intervals on the circumference a predetermined distance (14e) from the axis of this hole (14a). and a cylindrical portion (14c) extending in a tubular shape along the shaft (12), further comprising (14a)
and on the surface into which the cylindrical portion (14cl shaft (12)) fits.

Corresponding to the protrusion (15a) of the key (15), the flange (14) can be attached to the shaft (12) and parallel to the axis to prevent the flange (14) and shaft (12) from rotating relative to each other. It has a groove (14d) provided therein.

(16) is the second rotating part 7, such as a gear; (17) is the rolling body 9, such as a pole; and (18) is a washer.

The gear 6) has a cylindrical portion (14c) of the flange (14) in the center.
) has a hole (16al) penetrated, and this hole (16a)
As shown in FIG. 8, holes (16b) having a diameter larger than that of the pole (17) are arranged at equal intervals on the circumference of the radius (14e).
have. Also, the washer (18) is attached to the flange (
The cylindrical portion (14cl) of 14) is designed to be movable in the axial direction.

Number of holes (14b) on flange (14) and gear (16)
The number of holes (16b) is the same, and the number of holes (16b) in the pole (17) is equal.
6a), the flange (
14) is pressurized toward the hole f14bl. Note that the hole (14b) of the flange (14) has a through hole (14f).1. The diameter of this through hole (14f) is the diameter of the pole (17
) is smaller than the diameter of (.

It has a shape with a conical depression that is in contact with the pole (17).

(19) is provided along the circumferential direction of the surface of the cylindrical portion (14cl) of the flange (14) between the washer (18) and the gear (16) to prevent the gear (16) from moving to the left. A retaining ring installed in the groove (201 is a disc spring to press the washer (19) in the right direction,
(21) is a spring receiver fitted into the shaft (12).

(22) is an adjustment nut that is screwed into the threaded part (23) provided at one end of the shaft (12) and adjusts the pressing force by the nine disc spring (20); (241 is the flange (14) that moves in the right direction); It is a spacer to prevent the washer (191, disc spring (201)
, the adjusting nut (22) constitutes a pressurizing section.

(25) is a housing fixed to housing (2), and (26) is a gear that rotates following gear (16).

(27) is the bearing of the gear (26), and the housing (
25). (28) is screwed into the screw hole (26al) provided in the gear (26), and the gear (26
) rotates, the gear (26
) is a screw that moves left and right without rotating.

A mechanism (not shown) that determines the flight attitude of the aircraft is driven by a pin (not shown) extending from this screw (28).

Next, the operation will be explained. In FIG.

When the shaft (12) rotates and the flange (14) rotates with this shaft (12), the flange (14)
The pole (17) that has fallen into the hole (14bl) also rotates together with the flange (14).The pole (17) is connected to the gear (
I6) hole (16bl), so
The gear (16) in which the pole (17) rotates together with the flange (14) rotates. At this time, if the load torque of the gear (16) becomes larger than the limit value, the pole (17)
moves to the left, and the pole (17) and flange (14
), and the rotation of the shaft (12) is no longer transmitted to the gear (16). The limit value of the load torque mentioned above is determined by rotating the adjusting nut (22) and adjusting the spring retainer (21).
9 disc springs (20) move the washer (1) horizontally.
It can be adjusted by changing the pressing force that presses the pole (17) in the right direction via the pole (17).

In the application example of the rotation transmission device with torque limitation shown in FIG. 6, when the bin (28) can be easily moved in the left and right direction, the bin (28) is moved in accordance with the electric command given to the motor (6). It moves in the left and right direction and is converted into a mechanical command that determines the flight attitude of the aircraft, but for some reason the bin is
(28) If it locks or becomes stiff, use the bottle.
(28) is not forced to be driven.

In addition, the adjustment nut of the conventional rotation transmission device with torque limitation
Since (22) is screwed onto the shaft (12), there is a problem in that the pressurizing part cannot be adjusted when the rotation transmission device with torque limitation is removed from the shaft (12).

[Problems to be Solved by the Invention] In the conventional rotation transmission device with torque limitation, when the load torque of the gear 6) is larger than a predetermined limit value, the flange (1)
4) On the side, the part that slips with the pole (17) is on the circumference of a predetermined radius (14e).

There was a problem in that the wear of the flange (14) was concentrated in a specific area and the life of the device was shortened.

This invention was made in order to solve the above-mentioned problems, and when the load torque is larger than a predetermined limit value, the structure is such that they slip against each other, so that the parts that wear out do not concentrate on a specific part, and the device The object of the present invention is to obtain a rotation transmission device with torque limitation that has a long service life.

[Means to solve the problem] A rotation transmission device with torque limitation according to the present invention.

The first two are arranged opposite to each other and each has a hole in two opposing surfaces. a second rotating part; a first rolling body rotatably disposed in the hole of the first rotating part; a second rolling body arranged; a first rolling body; The first rolling body passes through the second rolling body. and a pressurizing section that applies pressure to the second rolling body in the direction of the first rolling body so that rotation is transmitted between the second rotating units.

1st. If the magnitude of the torque transmitted between the second rotating parts is less than a predetermined value, the pressing force is applied to the first rotating part. The rotation is transmitted via the second rolling body, and when the rotation exceeds a predetermined value, the second rolling body moves against the pressing force.

1st. The second rolling bodies slide against each other while rotating, thereby preventing transmission of rotation.

Furthermore, the first rotating part has a flange part on which the first rolling body is disposed, and a cylindrical part extending from the flange part, and the second rotating part and the pressurizing part are disposed in this cylindrical part. This is how it was done.

nii"i-/'R: 1 The rotation transmission device with torque limitation according to the present invention has the following features: 1.
When the torque transmitted between the second rotating parts is smaller than a predetermined value, the first rotating part. The first and second rotating parts are respectively disposed in the second rotating part and are mutually pressurized by the pressurizing part. The second rolling body pushes against each other in the direction of rotation, and the first rolling body pushes against each other in the direction of rotation. Rotation is transmitted between the second rotating parts, and when the transmitted torque is larger than a predetermined value, the rolling bodies move relative to each other in the direction of separating from each other, rotate and slip each other, and the first and second rotations occur. Rotational transmission between the parts is prevented.

In addition, by arranging the above-mentioned second rotating part and the pressing part in the cylindrical part extending from the flange part on which the first rolling body of the first rotating part is disposed, the pressing part can be connected to the other support body. (Enables adjustment of pressure force.)

[Embodiment of the Invention] FIGS. 1 and 2 show an example of application of an embodiment of the present invention, and correspond to FIGS. 5 and 6 in the prior art. Figure 3 is in Figure 2.

1 is an enlarged view of a portion of a rotation transmission device with torque limitation according to an embodiment of the present invention; FIG. Also.

FIG. 4 is a partial cross-sectional view of the circumferential surface of radius (1, 14e) in FIG. In FIGS. 1 and 2, the parts shown in FIGS. 3 and 4.

Since this device is different from the conventional device and the other parts are the same, FIG. 3 and FIG. 4 will be described in detail. In FIGS. 3 and 4, (IL (1a).

(19], (201 has the same shape as the one shown in Fig. 7 and has the same function. (11
21 is a shaft corresponding to the shaft (12) in FIG. 7; (114) is the first rotating part 1, for example, a flange;
(1151 is a recess provided in the shaft (112) (
When attached to the shaft (112a), a part of the shaft (112a)
This key has a protruding portion fl15a) that protrudes outward from the outer diameter of the key. The flange (1141 has a hole (114al) in the center into which the shaft (112) is inserted, and also has a flange part f114gl and a flange part fli.
4g) extending along the shaft fl12)
114c), and holes fl14b are equally spaced at a distance (125) on the circumference of the flange portion fl14a, which is a predetermined distance (114e3 away) from the axis of the hole (114a).
)have.

In addition, the surface of the flange (1141 to which the shaft (112) fits) corresponds to the protrusion (115al) of the key (115) so that the flange (114) can be attached to the shaft (112), and the flange (114+ and shaft (
112) has a groove (114d) provided parallel to the axis to prevent mutual rotation. (116) is the second rotating part 9, e.g. gear, fl17a), fl17b)
are the first rolling body and the second rolling body, respectively. The gear (116) has a hole (116a) in the center into which the cylindrical part (114cl) of the flange (1141) is inserted, and is rotatably supported by the flange (1141) through this hole (116a), and the radial hole 14e). On the circumference, distance (125)
Holes (116b) having a diameter larger than that of the second rolling body (117b) are provided at equal intervals. Note that the hole (114b) of the flange fl14) is connected to the first rolling body (
has a through hole (114hl) smaller than the diameter of 117a),
It has a spherical depression on the gear side with which the first rolling body fl17al contacts.

(121) is the spring holder for the disc spring (20), (122)
1 is screwed into the threaded part (114f) provided at the end of the cylindrical part (114cl) of the flange (114), and 9 is a disc spring (20).
This is an adjustment nut that adjusts the pressing force that presses the pole fl17bl to the left via the washer (18). In addition, the washer (18), disc spring (20), and spring holder (
121) and the adjustment nut f122) constitute a pressurizing part, and this pressurizing part is connected to the cylindrical part (114c) of the flange (o4).
) is supported.

Next, the operation will be explained. In fig.

The shaft (1121) rotates, and this shaft (112)
When the flange (1141) rotates, the pole (1
Since the 17aL pole (117b) is pressurized to the left by the washer (18), the flange (hole 1141)
The first rolling body (117
a) also rotates together with the flange fl14). Gear (1
16), if the load on the second
The rolling body (117b) is inserted into the hole (116) of the gear (116).
b), the flange (
114) and moving in the direction of the flange (114), when the first rolling body (117a) rotates together with the flange (114), the first rolling body (117a) rotates together with the flange (114).
7a) and the second rolling body (117b) push against each other, causing the gear (1161) to rotate.

At this time, when the load torque of the gear (116) exceeds the above-mentioned limit value, the second rolling body (lI7bl) moves to the right, and the first rolling body [117a] and the second rolling body (lI7bl) move to the right.
The shaft (17b) and the shaft (17b) slip each other while rotating.
12) is no longer transmitted to the gear (116).

Note that the limit value of the load torque mentioned above is determined by the adjustment nut (122
) and by changing the pressing force with which the two disc springs (20) press the second rolling body [1] 7b) to the left via the washer (18).

Since this adjustment nut (1221) is threaded onto the flange (1141), the above-mentioned limit value of the load torque can be set with the torque-limited rotation transmission device section removed from the shaft (1121).

In one embodiment of the present invention shown in FIGS. 2 and 3, the flange (11
The hole fl14b) provided in the first rolling body (I
Although the through hole (114h) has a smaller diameter than the diameter of 17al, this through hole (114hl may be different).

Additionally, in one embodiment of the invention, the flange (114)
A hole (114b) having a spherical recess that is in contact with the first rolling body (117a) is provided on the side, and a hole (16b) having a diameter larger than the diameter of the second rolling body (17b) is provided on the gear (116) side.
), but the first rolling body (
Provide a hole larger than the diameter of gear (117a) and insert the gear (116).
A spherical depression in contact with the second rolling body (117b) is provided on the side, and the first rolling body (117b) is inserted from the flange fl141 side via a washer. The second rolling bodies (117a) and (117b) may be pressurized toward the gear (116).

In addition, the gear (116) is not limited to the gear, but the second rolling body [
117b) as long as it rotates with the rotating body.

Further, the two disc springs (20) are not limited to disc springs, but may be coil springs.

Further, although the flange (114) is fixed so that it does not move to the left in the paper, the housing (1) is used, but the shaft (112) may be extended to the left in the paper and a retaining ring may be used. Furthermore, a method may be adopted in which a threaded portion is provided at the end of the shaft (112) and a nut and washer are screwed into the threaded portion.

Also, a retaining ring (19) is used to eliminate play in the axial direction of the gear fl161, but a washer or adjustment shim that is pressed to the left in the paper by the washer (18) is used. Good too.

[Effects of the Invention] As described above, according to the device of the present invention, when the torque transmitted between the first and second rotating parts exceeds a predetermined limit value,
The pressurized rolling bodies rotate and slip each other. Since the transmission of rotation between the second rotating parts is prevented, the places where they mutually slip are not fixed, so there is an effect that a device with less wear and a long life can be obtained.

Further, since the pressure section for pressurizing the rolling body is provided in the cylindrical portion of the flange, the pressure force can be set even when the rotation transmission device with torque limitation is removed from the shaft.

[Brief explanation of drawings]

FIG. 1 is a front view of the control mechanism section of an aircraft to which an embodiment of the present invention is applied, and FIG. 2 is a section II-II in FIG. 1.
FIG. 3 is an enlarged view of the torque-limited rotation transmission device in FIG. 2, and FIG.
In the figure, a flange on a cylindrical surface whose axis is the axis of rotation and passes through the center of the pole. It is a partial sectional view of a ball, a gear, and a washer. FIG. 5 is a front view of the control mechanism of an aircraft to which the conventional torque-limited rotation transmission device corresponding to FIG. 1 is applied, FIG. 6 is a partial sectional view of the rV-TV in FIG. 5, and FIG. 6 is an enlarged view of a portion of the rotation transmission device with torque limitation, and FIG. 8 is a partial cross-sectional view taken along the line -■ in FIG. 7. In the figure, (18) is a washer, (20) is a disc spring,
(114) is a flange, (116) is a gear, (1
17al, fl17b) are the first and second rolling bodies, (121) is the spring receiver, and (122) is the adjustment nut. In addition, in FIG. 9, the same reference numerals indicate the same or corresponding parts. Figure 1

Claims (2)

[Claims] (1) first and second rotating parts that are arranged to face each other and have holes in their opposing surfaces; a first rolling body that is rotatably arranged in the hole of the first rotating part; A second rolling body is rotatably and movably disposed in the hole of the second rotating part and is in contact with the first rolling body, and the first and second rolling bodies are a pressurizing part that applies a pressing force to the second rolling body in the direction of the first rolling body so that rotation is transmitted between the rotating parts, and torque transmitted between the first and second rotating parts. If the magnitude is less than a predetermined value, the rotation is transmitted through the first and second rolling bodies due to the pressing force, and when it exceeds the predetermined value, the second rolling body resists the pressing force. move,
A rotation transmission device with torque limitation, characterized in that the first and second rolling bodies slide against each other while rotating, thereby preventing transmission of the rotation. (2) The first rotating part has a flange part on which the first rolling body is disposed and a cylindrical part extending from this flange part, and the second rotating part and the pressurizing part are disposed in this cylindrical part. The rotation transmission device with torque limitation according to claim 1, characterized in that: