JPH0615146Y2 - Spring device for spring return type control motor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a spring device in a spring return type control motor.

(Prior Art) FIG. 6 is an explanatory view of a conventional spring return type control motor, in which 1 is a reversible motor, 2 is a motor shaft, 3 is an output shaft for driving, for example, an air conditioning valve or a damper, and 4 is an output shaft. A drive gear fixed to 3, 5 is a reduction gear interposed between the drive gear 4 and the motor shaft 2, and 6 is a spiral type coil wound by the output shaft 3 when the output shaft 3 is driven in the positive direction. Indicates a spring.

In such a spring return type control motor, the motor 1 has a built-in brake, and if the brake is released and the stator coil is excited to rotate the motor 1 in the forward direction, the output shaft 3 is rotated through the gears 5 and 4. Rotates in the forward direction to open, for example, an air conditioning valve or a damper, and at the same time, the spring 6 is wound.

When the air-conditioning valve and the damper are closed in the normal operation, the motor 1 is rotated in the reverse direction to reverse the output shaft 3.

In this case, the spring 6 operates so as to rotate the output shaft 3 in the reverse direction at a high speed, but its rotation speed is suppressed by the reverse rotation of the motor 1 and does not increase.

When an accident occurs during a power failure with the air conditioning valves and dampers open, the brake of the motor 1 is released and the force of the spring 6 causes the output shaft 3 to immediately rotate in the opposite direction at a high speed to cause the air conditioning. The valve and damper will be closed immediately.

7 and 8 show a conventional spring device for accommodating the spiral spring 6, where 7 is a fixed shaft around which the outer end 8 of the spring 6 is wound, 9 is a spring base, and 1 is a spring.
Reference numeral 0 denotes a ring surrounding the outer circumference of the spring 6, and the spring base 9 and the ring 10 constitute a barrel for supporting the spring 6, but in this example, the spring base 9 and the ring 10 are separated from each other to reduce the barrel manufacturing cost. I am busy.

(Problems to be solved by the invention) However, in the conventional spring device, when the spring 6 is completely loose, the outer circumference of the spring 6 is in complete contact with the inner circumference of the ring 10, as shown in FIG. When the spring 6 is caught, the spring 6 and the spring 6 are widely separated as shown in FIG.
In the case where the axis is vertical, one end of the ring 10 is disengaged downward from one side of the spring 6 and does not function as a ring. As a result, the posture of the spring 6 collapses and complete operation cannot be performed. There was a flaw.

The spring device of the spring return type control motor of the present invention eliminates the above drawbacks.

(Means for Solving the Problem) A spring device in a spring return type control motor of the present invention is a spring return device including a reversible motor, an output shaft, a spring device, and a connecting mechanism connecting the motor and the output shaft. Control motor, the spring device comprises a spiral spring having an inner end fixed to an output shaft wound by the reversible motor, and a barrel, the barrel supporting the spring, and the outer periphery of the spring. It is characterized in that it is separated by a restraining mechanism so that a part of this ring is always in contact with the outer circumference of the spring.

The mechanism for suppressing the ring is a wire spring wound around a fixed shaft that fixes the outer end of the spring,
One end of this wire spring is fixed to the fixed shaft,
The other end is in contact with the outer circumference of the ring.

Further, the mechanism for suppressing the ring is a wire spring wound around a fixed shaft to which the outer end of the spring is fixed, one end of the wire spring is fixed to the fixed shaft, and the other end is opposed to the outer circumference of the ring. It is characterized in that they are in contact with each other, and the opposed portions are curved so as to meander to the left and right in the axial direction of the ring.

(Operation) According to the spring device of the spring return type control motor of the present invention, even when the spring is wound, a part of the ring is pressed against the outer circumference of the spring, and there is no possibility that the ring will fall from the spring.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

In the present invention, as shown in FIGS. 1 and 2, a spring suppressing mechanism 11 such as a wire spring is wound around a fixed shaft 7, and one end 11-1 thereof is fixed to the fixed shaft 7 and the other end 11-2 thereof is provided. Is opposed to the outer circumference of the ring 10 so that the ring 10 is always in contact with the outer circumference of the spring 6, for example, 5
It can be suppressed with a load of about 00g.

In the embodiment shown in FIG. 6, the structure in which the spring 6 is directly attached to the output shaft 3 is shown. The following description is based on the same drawing. It is not limited to 3, but is connected to the motor drive shaft,
Any axis may be used as long as it can be involved in the winding and releasing operations.

Also, in the embodiment shown in FIGS. 1 and 2, the other end of the spring restraint mechanism 11 extends linearly in the circumferential direction of the ring 10, and the spring restraint mechanism 11 has some kind of axial direction of the ring 10. When an external force is applied to the ring 10, it may come off the ring 10 as shown by the chain double-dashed line in FIG.

Therefore, in another embodiment of the present invention, as shown in FIGS. 4 and 5, the other end 11-2 of the spring restraining mechanism 11 facing the outer circumference of the ring 10 is meandered to the left and right in the axial direction of the ring 10. For example, it is bent in a U shape.

In this embodiment, the ring 1 is attached to the spring suppressing mechanism 11.
Even if some external force is applied in the axial direction of 0, the other end 11-
The part 2 does not come off from the ring 10.

(Effects of the Invention) Since the spring device in the spring return type control motor of the present invention has the above-mentioned structure, there is a great advantage that the ring 10 is always kept substantially horizontal and the action of the spring 6 is perfect.

[Brief description of drawings]

FIG. 1 is a plan view of a spring device in a spring return type control motor of the present invention, FIG. 2 is a front view thereof, FIG. 3 is an explanatory view of the spring device shown in FIG. 2 in case of an abnormality, and FIG. FIG. 5 is a plan view showing another embodiment, FIG. 5 is a front view thereof, FIG. 6 is an explanatory view of a spring return type control motor, FIG. 7 is a plan view of a conventional spring device, and FIG. 8 is a front view thereof. FIG. 9 is a plan view of the spring device with the spring loosened. 1 ... Reversible motor, 2 ... Motor shaft, 3 ... Output shaft, 4 ... Drive gear, 5 ... Reduction gear, 6 ... Spring, 7 ... Fixed shaft, 8 ... Outer end, 9 ... Spring base, 10 ... Ring, 11 ... Spring restraining mechanism,
11-1 ... One end of the spring restraint mechanism, 11-2.
The other end of the spring restraint mechanism.

Claims (3)

[Scope of utility model registration request] 1. A spring return type control motor comprising a reversible motor, an output shaft, a spring device, and a connecting mechanism for connecting the motor and the output shaft, wherein the spring device is wound by the reversible motor. It consists of a spiral-shaped spring with its inner end fixed to a barrel, and a barrel, which is separated into a base for supporting the spring and a ring surrounding the outer periphery of the spring. A spring device in a spring return type control motor, wherein the spring device is suppressed by a suppressing mechanism so as to come into contact with the outer circumference of the spring. 2. A mechanism for restraining the ring is a wire spring wound around a fixed shaft having an outer end of the spring fixed, one end of the wire spring being fixed to the fixed shaft and the other end of the ring. The spring device for a spring return type control motor according to claim 1, wherein the spring device is contacted with the outer circumference. 3. A mechanism for suppressing the ring is a wire spring wound around a fixed shaft having an outer end of the spring fixed, one end of the wire spring being fixed to the fixed shaft and the other end of the ring. 2. The spring device for a spring return type control motor according to claim 1, wherein the spring device is in contact with the outer circumference, and the contacted portion is curved so as to meander in the axial direction of the ring.