JPS589296Y2 - Vacuum actuator stroke control device - Google Patents

Description

[Detailed description of the invention] This invention relates to a stroke control device for an actuating body that is coupled to a diaphragm of a vacuum actuator and reciprocates due to the swinging of the diaphragm, and the purpose of this invention is to provide a device that has a simple structure and can reliably control the stroke. It was devised as

In this type of conventional device, two or more vacuum chambers are formed in the vacuum actuator, and the vacuum pressure conduction to each vacuum chamber is controlled to control the reciprocating distance, that is, the stroke, of the actuating body in multiple stages.

However, forming two or more vacuum chambers, connecting a vacuum source to each vacuum chamber, controlling vacuum pressure conduction, etc. are complicated in structure, complicated to operate, expensive, and uneconomical. There was an inconvenience.

The structure of the present invention is that an engaging part is provided on the actuating body, a locking piece is provided that moves in and out on the locus of the reciprocating movement of the engaging part, and the actuating body is The actuator is stopped midway between the start and end points of the full stroke, or released from its engagement (thereby allowing the actuating body to move throughout the full stroke).

The present invention will be described in detail below with reference to the illustrated embodiments.

FIG. 1 shows a configuration in which a vacuum actuator 1 controls the opening and closing of a damper 2 of an automobile air conditioner. A wire 5 is attached to the tip of a rod 4 fixed to a diaphragm 3, and the wire is connected to the damper 2. be.

6 is a spring for return. Here, the actuating body of the vacuum actuator 1 is a general term for all components that reciprocate following the swinging of the diaphragm 3, that is, the rod 4, the wire 5, and the damper 2.

Then, a portion 7 that is long in the stroke direction is carved on the intermediate side surface of the rod 4, and the stepped portion 7a serves as an engaging portion, and the recessed portion 7
A locking rod 8 is provided which protrudes in and out through energization control of a solenoid coil 90 and engages with the stepped portion 7a, thereby forming a locking piece.

10 is a reinforcing boss that supports the force that the locking piece 8 receives due to engagement with the stepped portion 7a; 11 is a guide for the rod 4;

Next, the operation will be explained.

Now, with the locking rod 8 in a suctioned state as shown by the solid line in Figure 1, if vacuum pressure is introduced into the vacuum chamber 12 and then removed,
As the diaphragm 3 swings, the actuating body reciprocates over the entire stroke, and the damper 2 swings between A and C.

Next, when the solenoid coil 9 is energized to cause the locking rod 8 to protrude into the reciprocating locus of the stepped portion 7a as shown by the chain line in FIG. 1, when the rod 4 is attracted to the right, the stepped portion 7a Engages with the locking rod 8 to prevent the rod 4 from moving to the right;
The actuating body stops in the middle, and the damper 2 also stops at the B position.

FIG. 2 and subsequent figures show the engagement portion and the locking piece separately.

In FIG. 2, a long groove 13a and a short groove 13b, which are long in the reciprocating direction of the rod 4, are aligned to form an elongated hole 13, which forms a stepped portion 13c that becomes an engaging portion. A pin 14 is provided to protrude through the elongated hole 13, and the pin 14 can be moved between the long groove 13a and the short groove 13b to be freely engaged with and disengaged from the stepped portion 13c.

In FIG. 3, a fan plate 16 is provided coaxially with the shaft 15 of the damper 2, a stepped portion 16a serving as an engaging portion is provided at the tip of the fan plate 16, and the locking rod 8 is directed toward the tip of the fan plate 16. The step portion 16a and the locking rod 8 are configured to be freely removable.

Both embodiments of FIGS. 2-3 operate in the same manner as the first embodiment.

The locking rod 8 may be driven electromagnetically as in the illustrated example, or may be driven manually or by using a vacuum actuator.

As described above, the stroke control device of the present invention can be constructed at low cost using a vacuum actuator with a simple structure having only one vacuum chamber, and the engagement and disengagement between the engagement part and the locking piece is mechanically performed. The operation is stable because it is performed reliably, and the working distance of the rod can be easily adjusted by adjusting the position of the engaging part and the locking part, and the l stroke of the vacuum actuator can be used in multiple stages. This has great practical effects.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a plan view of the first embodiment, FIG. 2 is a plan view of the second embodiment, and FIG. 3 is a plan view of the third embodiment. 1: Vacuum actuator, 2: Damper, 3: Diaphragm, 4: Rod, 5: Wire, T: Recess, Ta:
Step portion, 8: Locking rod, 13: Elongated hole, 13c: Step portion, 14: Pin, 16: Fan plate, 16a: Step portion.

Claims (1)

[Scope of utility model registration request] The actuating body of the vacuum actuator, which is connected to the diaphragm and moves reciprocatingly due to the swinging of the diaphragm, is provided with a retaining portion at an arbitrarily determined position between the start and end points of the stroke, and the reciprocating locus of the engaging portion is A stroke control device for a vacuum actuator, which is provided with a locking body which can be moved in and out, and which extends in an intersecting manner to engage with the engaging portion and stop the actuating body.