JPH0548996U - Coupling device - Google Patents

Abstract

(57) [Summary] [Purpose] To reduce the driving force generated by the motor and improve the maneuverability of the radio-controlled helicopter. [Structure] The outer ring 10d is attached to a torque plate 1 which is rotated by a driving force of a servo motor mounted on a radio control helicopter.
A radial bearing 10 having a rotating wheel is fixed. An inner surface 11a of a spherical ring 11 having a spherical outer surface 11b is adhered and fixed to the outer ring 10d,
A round hole 3 a opened in the rod end 3 is fitted into the outer side surface 11 b of the spherical ring 11. The side surface 3b of the round hole 3a is formed in a spherical shape, so that when the torque plate 1 rotates, the rod end 3 rotates while tilting about the shaft hole 10a of the radial bearing 10. There is.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a joint device for transmitting a driving force of a servo motor mounted on a radio control helicopter.

[0002]

[Prior Art]

 In general, a radio-controlled helicopter is controlled in attitude by tilting the rotating main rotor.Therefore, a radio-controlled helicopter is equipped with a servo motor that generates a driving force for tilting the main rotor. The driving force of the servomotor is transmitted to the device for inclining the main rotor via the torque plate and the joint device.

Therefore, as shown in FIG. 5, in the conventional joint device, a spherical metal ball 17 which is a support body fixed to the surface of the torque plate 14 by the screw 15 and the nut 16 and the metal ball 17 is fitted. A round hole 18a for wearing is formed of a plastic rod end 18 formed at the tip.

Since the torque plate 14 is rotated by the drive of the servomotor, it is formed in a disk shape. Further, the round hole 18 a formed at the tip of the rod end 18 has a side surface 18 b. It is formed in a spherical shape.

In the conventional joint device having the above-described configuration, the round hole 18a formed in the rod end 18 is fitted into the metal ball 17 fixed to the torque plate 14, so that the torque plate is driven by the driving force of the servo motor. When 14 rotates, the rod end 18 rotates while sliding around the metal ball 17.

Although not shown in FIG. 5, a bell crank, which is rotatable in a plane perpendicular to the rotation plane of the rod end 18, is connected to the other end of the rod end 18. Therefore, due to the rotation of the bell crank, the rod end 18 rotates about the metal ball 17 while slightly tilting with respect to the rotation plane.

[0007]

[Problems to be solved by the device]

 However, in the above-mentioned conventional joint device, the round hole 18a having the spherical side surface 18b formed in the rod end 18 is fitted into the spherical metal ball 17 fixed to the torque plate 14. When the torque plate 14 rotates, the rod end 18 can rotate while tilting around the metal ball 17, but a large frictional force due to sliding on the contact surface between the side surface 18b of the round hole 18a and the metal ball 17 is caused. Therefore, in order to rotate the rod end 18, there is a problem that the servo motor must generate a large driving force to rotate the torque plate 14.

Further, since the rod end 18 does not rotate smoothly due to the frictional force generated at the contact surface between the round hole 18a and the metal ball 17, the main rotor also does not tilt smoothly and the controllability of the radio controlled helicopter is poor. There are also problems.

Therefore, the present invention has been made in view of such a problem, and by suppressing a frictional force generated at a connecting portion between a movable member such as a torque plate and a rod end, a drive generated by a motor is suppressed. An object of the present invention is to provide a joint device that requires only a small force and that smoothly rotates a rod end to improve the controllability of a radio controlled helicopter.

[0010]

[Means for Solving the Problems]

 To achieve the above object, the present invention comprises a spherical support body fixed to a movable member for transmitting a driving force of a motor, and a spherical side surface on a rod end interlocking with the movable member. In the joint device in which the rod end is rotatable while tilting about the support body when the movable member is actuated by fitting the circular hole, the support body is fixed to the movable member. It is characterized by comprising a bearing and a spherical ring having an inner surface fixed to the rotating ring of the rolling bearing and an outer surface having a spherical shape.

[0011]

[Action]

 In the above-mentioned invention, by fitting the round hole of the rod end whose side surface is formed into a spherical shape to the support member fixed to the movable member, when the movable member is actuated by the driving force of the motor, As a result, the rod end rotates.

At this time, since the rotary wheel of the rolling bearing that constitutes the support body smoothly rotates while suppressing the frictional force, and the spherical ring also rotates integrally with the rotary wheel. The rod end, which has a round hole fitted to the outer surface of the mold ring, rotates smoothly around the support.

Further, since the outer surface of the spherical ring is formed in a spherical shape and the round hole of the rod end having a spherical side surface is fitted into the spherical ring, the rod end is rotated. It is possible to rotate smoothly around the support while tilting with respect to the plane.

[0014]

【Example】

 An embodiment of the joint device according to the present invention will be described in detail below with reference to FIGS.

FIG. 1 is a perspective view showing a state of use of this joint device in a radio control helicopter.

In this figure, the joint device transmits the driving force of the servo motor mounted on the radio-controlled helicopter to the device that tilts the main rotor of this helicopter, and therefore the torque plate that rotates by the driving force of the servo motor is used. 1 and a plastic rod end 3 having one end fitted to the support 2. The rod end 3 is connected to the torque plate 1 via the support 2 so as to be rotatable in a plane parallel to the rotation plane of the torque plate 1.

Here, the servo motor is built in the box 4 together with the electronic components for controlling the servo motor, and the torque plate 1 is formed in a disk shape as a movable member that can be rotated by the servo motor. At the same time, four holes 1a for fixing the support 2 are opened on the disc surface.

Further, one end of a rod-shaped rod 5 is connected to the other end of the rod end 3, and one end of a rod end 6 similar to the rod end 3 is connected to the other end of the rod 5. There is.

Further, one end of an L-shaped bell crank 7, which is a movable member, is connected to the other end of the rod end 6 via a support body 2, similarly to the connection between the torque plate 1 and the rod end 3. The bell crank 7 is supported so as to be rotatable about a bending portion 7a in a plane perpendicular to the plane of rotation of the torque plate 1.

Further, one end of a rod end 8 similar to the rod end 3 is connected to the other end of the bell crank 7 via the support body 2 similarly to the connection between the torque plate 1 and the rod end 3. In addition, one end of a rod-shaped rod 9 is connected to the other end of the rod end 8.

Although the other end of the rod 9 is omitted in FIG. 1, the rod 9 is connected to a device for tilting the main rotor of the radio controlled helicopter, and the movement of the rod 9 tilts the main rotor to control the attitude of the radio controlled helicopter. ..

Next, a detailed configuration of the joint device will be described with reference to FIGS. 2 and 3.

FIG. 2 is a perspective view showing a state where one end of the rod end 3 is fitted to the support body 2. FIG. 3 shows that the torque plate 1 and the rod end 3 are connected via the support body 2. FIG. 3 is a cross-sectional view showing a state in which it is formed.

In FIG. 2, the support 2 is composed of a rolling bearing and a spherical ring 11. In the present embodiment, the radial bearing 10 is used as the rolling bearing, and the radial bearing 10 also includes the torque plate 1. It is fixed by screws 12 to the disc surface (not shown in FIG. 2).

Further, a round hole 3a is opened at one end of the rod end 3, and the support body 2 including the radial bearing 10 and the spherical ring 11 is fitted into the round hole 3a.

More specifically, referring to FIG. 3, the radial bearing 10 includes an inner ring 10b forming the shaft hole 10a and an outer ring 2d rotatably holding the rolling element 10c between the inner ring 10b and the inner ring 10b. The screw 12 is inserted through the shaft hole 10a and the hole 1a of the torque plate 1, and the screw portion 12a of the screw 12 protruding through the hole 1a is fastened by the nut 13.

A washer 14 is sandwiched between the shaft hole 10 a and the hole 1 a of the torque plate 1, and the screw 12 is inserted through the hole of the washer 14.

As a result, in the radial bearing 10, the inner ring 10b is not rotatable, and the outer ring 10d is rotatable about the shaft hole 10a in a plane parallel to the rotating plane of the torque plate 1. The radial bearing 10 is fixed to the disc surface of the torque plate 1 by using the outer ring 10d as a rotating ring.

The spherical ring 11 has an inner side surface 11 a forming a ring with a vertical cross section and an outer side surface 11 b formed in a spherical shape. The inner side surface 11 a and the outer ring 10 d of the radial bearing 10 are anaerobic. The radial bearing 10 and the spherical ring 11 are integrally fixed to each other by a fixing agent to form the support 2.

As a result, the spherical ring 11 rotates integrally with the outer ring 10 d of the radial bearing 10 about the shaft hole 10 a of the radial bearing 10.

The rod end 3 has a round hole 3a opened at one end, and the side surface 3b of the round hole 3a is formed in a spherical shape, and the rod 5 is connected to the other end of the rod end 3. The threaded portion 3c is formed for the purpose.

The spherical ring 11 integrated with the radial bearing 10 is fitted into the round hole 3 a of the rod end 3, and the screw portion 5 a formed at one end of the rod 5 and the screw portion of the rod end 3 3c are fastened, and the rod 5 and the rod end 3 are connected.

As a result, the rod end 3 is connected to the torque plate 1 via the support 2 composed of the radial bearing 10 and the spherical ring 11.

Although not shown in FIG. 3, the rods 5 and 9 and the rod ends 6 and 8 shown in FIG. 1 are connected by fastening the screw portions in the same manner as the connection between the rod 5 and the rod end 3. Further, the rod ends 6 and 8 and the bell crank 7 are also connected via the support body 2 similarly to the connection between the rod end 3 and the torque plate 1.

The operation of the joint device configured as described above will be described again with reference to FIGS. 1 to 3. In FIG. 1, when the torque plate 1 is rotated in the direction of arrow a by the driving force of the servomotor, the rod end 3 connected to the torque plate 1 via the support 2 rotates about the support 2. While moving, move in the direction of arrow B.

Since the rod 5 is connected to the rod end 3 and the rod end 6 is connected to the rod 5, the rod 5 and the rod end 6 also move in the direction of the arrow B in conjunction with the movement of the rod end 3. Move.

Further, a bell crank 7 is connected to the rod end 6 via a support body 2, and the bell crank 7 is provided in a vertical plane with respect to a rotation plane of the torque plate 1 and has a bending portion. It rotates in the direction of arrow C around 7a.

Furthermore, since the rod crank 8 is connected to the bell crank 7 through the support 2 and the rod end 8 is connected to the rod 9, the bell crank 7 is linked to the rotation of the bell crank 7, The rod end 8 and the rod 9 move about the support 2 in the direction of arrow D while rotating.

Focusing on the movement of the rod end 3, one end of the rod end 3 which is connected to the torque plate 1 is rotated around the support 2 in association with the rotation of the torque plate 1. Move in the direction of arrow B.

On the other hand, a bell crank 7 that rotates in the direction of the arrow C in a plane perpendicular to the rotation plane of the torque plate 1 is connected to the rod end 6, and this rod end 6 is connected via the rod 5. Since the rod end 3 is connected to the rod end 3, the rod end 3 moves in the direction of arrow B and tilts in the direction of arrow E which is a direction perpendicular to the direction of arrow B.

That is, as shown in FIGS. 2 and 3, when the torque plate 1 rotates, the outer ring 10d of the radial bearing 10 having the inner ring 10b fixed to the torque plate 1 causes frictional force about the shaft hole 10a. While rotating smoothly, the spherical ring 11 having the inner surface 11a adhered and fixed to the outer ring 10d also rotates integrally.

Further, since the outer side surface 11b of the spherical ring 11 and the side surface 3b of the round hole 3a opened in the rod end 3 are in contact with each other, the rod end 3 is moved along with the rotation of the spherical ring 11. Rotate integrally in the direction of the arrow.

On the other hand, the side surface 3 b of the round hole 3 a opened in the rod end is spherical, and the side surface 3 b and the spherical outer surface 11 b of the spherical ring 11 slide to move the rod end 3 When the radial bearing 10 is rotated about the shaft hole 10a, the radial bearing 10 is rotated while tilting in the arrow direction of E.

Since the rod ends 6 and 8 are also connected to the bell crank 7 which is a movable member via the support body 2 like the rod end 3, the movement of the rod ends 6 and 8 is also made. Is similar to the movement of.

Therefore, according to the joint device configured as described above, when the torque plate 1 rotates, the rod ends 3, 6, 8 suppress the frictional force by the radial bearings 10 forming the support body 2. However, since it smoothly rotates around this support body 2, the driving force of the servomotor for rotating the torque plate 1 is smaller than in the conventional case.

When the rod ends 3, 6, 8 rotate about the support 2, the outer surface 11 b of the spherical ring 11 forming the support 2 and the rod ends 3, 6, 8 are opened. Since the side surface 3b of the round hole 3a slides, the rod ends 3, 6, 8 can be smoothly rotated while tilting with respect to the rotation plane, and this joint device is a device for tilting the servomotor and the main rotor. When used between and, the controllability of the radio control helicopter is improved.

Furthermore, since the rod ends 3, 6 and 8 rotate smoothly while suppressing the frictional force by the radial bearing 10, the sliding surface is worn away by the large frictional force caused by sliding as in the conventional case. It has good durability.

In this embodiment, the case where the joint device is used in the radio control helicopter has been described, but the present invention is not limited to this, and may be used in a radio control car or the like.

[0049]

According to the joint device of the present invention, the round hole of the rod end having a spherical side surface is fitted into the support member fixed to the movable member, so that the driving force of the motor can be applied. When the movable member is actuated, the rotary wheel of the rolling bearing that constitutes the support body rotates smoothly while suppressing the frictional force, and the spherical ring rotates together with the rotary wheel. Furthermore, since the rod end having the round hole fitted to the outer surface of the spherical ring also rotates smoothly, the driving force of the motor for operating the movable member can be small.

A spherical ring having a spherical outer surface is fixed to the rotary ring of the rolling bearing, and a round hole of a rod end having a spherical side surface is attached to the spherical ring. Since the rod end is tilted with respect to the rotation plane, the rod end can smoothly rotate around the support, and this joint device can be installed between the motor and the steering device mounted on the radio control helicopter or radio control car. When used for, the maneuverability is improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a state in which an embodiment of a joint device according to the present invention is used in a radio control helicopter.

FIG. 2 is a perspective view showing a state where one end of a rod end is fitted to a support body of this joint device.

FIG. 3 is a cross-sectional view showing a state in which a torque plate and a rod end are connected via a support body of this joint device.

FIG. 4 is a perspective view showing a configuration of a conventional joint device.

[Explanation of symbols]

 1 Torque Plate (Movable Member) 2 Support 3 Rod End 3a Round Hole 10 Radial Bearing (Rolling Bearing) 11 Spherical Ring

Claims (1)

[Scope of utility model registration request] 1. A spherical support body fixed to a movable member for transmitting a driving force of a motor, and a round hole having a spherical side surface formed on a rod end interlocking with the movable member. When the movable member is actuated to operate, the rod end is rotatable about the support body while tilting about the support body. The support body includes a rolling bearing fixed to the movable member and the rolling bearing. A coupling device comprising: a spherical ring having an inner surface fixed to a rotating wheel of a bearing and an outer surface formed into a spherical shape.