JPH039565Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] The present invention relates to a stopper in an electric control valve, and relates to a structure that reduces impact noise when the stopper stops the operation of a rotor.

As a conventionally known technique, the one shown in Utility Model Application No. 58-61972 is known, and in this case, the stopper is made of a rigid body, so the impact noise hitting the stopper becomes loud when the drive of the lubricant stops. There are drawbacks.

The present invention has been developed with the above-mentioned points in mind, and the purpose of this invention is to reduce the impact noise caused by the stopper for positioning the rotor by composing the stopper with an elastic material through a buffering effect. be.

[Structure of the idea]

An embodiment of the present invention will be described below with reference to the drawings.A mandrel 3 is provided on an extended portion of the central axis of a rotor 1 in a motor and fixed to a case 2, and the outer periphery of the mandrel 3 is made of an elastic metal wire. A helical guide ring 4 is wound around the helical guide ring, and a slider 5 also made of an elastic metal wire engages with the helical groove of the helical guide ring so as to be rotatable and vertically movable. The end 5a engages with a locking rod 7 erected on the rotor 6. Stopper portions 4 are provided at both ends of the spiral guide ring 4 in the axial direction.
a and 4b are provided.

In the above configuration, when the coil 8 shown in FIG. 3 is energized and the rotor 6 is rotated, the needle valve 9 is moved to
The slider 5 moves up and down along the spiral guide ring 4 and the locking rod 7 as the slider 5 comes into contact with and separates from the rotor 6, and the rotation of the rotor 6 is stopped at the position where the slider 5 abuts against the stopper portion 4a or 4b. At this time, the stopper parts 4a, 4 formed of elastic metal wires are
b and slider 5 perform a buffering action.

〔effect〕

As described above, in the present invention, the stopper against which the slider collides for positioning the rotor is formed at the end of the spiral guide ring made of elastic wire, so it has a shock-absorbing effect due to its elasticity. The stopper has excellent durability due to its low noise and elastic impact action, and the stopper part can be easily assembled to the mandrel.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention;
FIG. 2 is a bottom end view of the main parts of the same as above, and FIG. 3 is a longitudinal sectional view of an electric control valve in which the present invention is implemented. 1... Rotor, 2... Case, 3... Mandrel, 4
...Spiral guide ring, 4a, 4b...stopper part, 5...slider, 9...valve body.

Claims (1)

[Scope of utility model registration request] A mandrel is fixed to a case on the central axis of a rotor in a motor that drives a valve body, and a helical guide ring made of an elastic metal wire is wound around the mandrel, and a spiral groove of the helical guide ring is provided. The slider is provided so as to be rotatable and movable in the axial direction of the mandrel, and the outer end of the slider is engaged with a locking rod erected on the rotor, and the outer end of the slider is connected to the helical guide. A stopper for an electric control valve, characterized in that the stopper is made to abut against stopper parts provided at both ends of a ring.