JPS60192105A - Rectilinear-reciprocating actuator - Google Patents

Abstract

PURPOSE:To make the movement of an actuating rod controllable into three stages, by setting up each stopper in the outer circumferential part of a guided part, a second housing and the outer circumferential part of the actuating rod, respectively. CONSTITUTION:A stopper part 3c at the side of a pressure chamber A is set up in the outer circumferential part of a guided part 3a, while a stopper part 6a is set up in a second housing 6, and a stopper part 8b is set up in the outer circumferential part of an actuating rod 8. When suction pressure is led into a vacuum port 5 of the pressure chamber A, the stopper part 3c comes into contact with the bottom of a first housing 1 whereby the actuating rod 8 comes to move as far as a distance L1 in consequence, and when suction pressure is led into another vacuum port 10 of a pressure chamber B, both stopper parts 8b and 6b are made contact with each other, so that the actuating rod 8 comes to move as far as a distance L2 in consequence. Therefore, movements of the actuating rod 8 are controllable into three stages.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an actuator having an actuating rod that performs linear reciprocating motion in multiple stages by pneumatic control, and particularly relates to an actuator that independently reduces the pressure in two chambers. This allows the moving distance of the actuating rod to be adjusted in three stages.

INDUSTRIAL APPLICABILITY The present invention can be used in applications that require the function of linearly reciprocating an actuating rod by controlling air pressure, such as air blowing switching control for an automobile defrost, air conditioner control system for an automobile air conditioner, etc. Along with the control, it can be used to control the thrower 1 hell lever, etc. so as to control the engine rotation speed.

[Prior Art] As an actuator of this type that performs the function of linearly reciprocating an actuating rod by pneumatic control, an actuator as described in Japanese Patent Publication No. 56-21895 is known. The actuator has a chamber between the diaphragms and a chamber between the diaphragms and the case,
Two systems of pressure are introduced into the chambers, and the actuating rod is displaced in two stages by the negative pressure in each chamber. In conventional acticoators of this kind, there is no coupling relationship between the chambers, so the movement of the actuating rod can be changed in two stages depending on the pressure state of the two chambers, and depending on the control system, on/off control, etc. Since it was only possible to do so, its control had to be very rough. Alternatively, in the case of opening/closing switching, two-stage switching operation was possible.

Therefore, its uses were also limited.

[Object of the Invention] An object of the present invention is to provide an actuator in which the movement of an actuating rod can be controlled in three stages by controlling the air pressure of two air chambers.

[Configuration of the Invention] The present invention includes a pressure chamber A formed by a housing, a first diaphragm, and a compression spring installed between the housing and the first diaphragm, and a pressure chamber A formed by a compression spring installed between the first diaphragm and the second diaphragm.
a pressure chamber B formed by a compression spring installed between a diaphragm, a housing, and a first diaphragm and a second diaphragm; a first diaphragm self-limiting means and a second diaphragm regulating means attached to the first diaphragm; It is composed of a second diaphragm self-limiting means that limits movement by the second diaphragm regulating means that is constrained by the second diaphragm regulating means attached to the second diaphragm, and an actuating rod that transmits the drive to the outside, Furthermore, since the movement W11 of the first dianomm 1 (2) is not set to the same length as the movement chamber 1 of the second diaphragm regulating means, the negative pressure in the pressure chamber A, Negative pressure in B, pressure chamber A and pressure chamber B
The actuating rod attached to the second diaphragm is moved in three stages by a combination of three types of negative pressure.

[Embodiments of the invention] FIG. 1 shows a cross-sectional view of one embodiment of the invention.

In the figure, a compression spring 4 is installed between the first housing 1, the first diaphragm 2, the sliding rod 3 to which the first diaphragm 2 is attached, and the first housing 1, and the pressure from the vacuum boat 5 causes the volume to increase. A pressure chamber A is formed in which the pressure changes.

In addition, a compression spring is provided between the second housing 6, the first diaphragm 2, the second diaphragm 7, the sliding rod 3 from which the first diaphragm 2 is removed, and the operating rod 8 to which the second diaphragm 7 is attached. 9 to form a pressure chamber B whose volume is changed by the pressure from the vacuum boat 10.

Since both housings are made of resin, the first housing 1 and the second housing 6 are joined by ultrasonic welding or the like. At this time, the outer periphery of the first diaphragm 2 is sandwiched between the ends of both housings, and the first diaphragm 2 is sealed and fixed. Further, the second diaphragm 7 is sandwiched between the end of the second housing 6 and the metallic diaphragm cover 11, and the cover 11 is fixed to the caulking 11a, thereby sealing and fixing the second diaphragm 7.

A guide convex portion 1a is provided protruding from the inner center of the first housing 1. As shown in FIG. The guide convex portion 1a fits into the guided portion 3a of the sliding rod 3, and the guide convex portion 1a and the guided portion 3a
is slidable in the direction of its central axis. In order to make the pressure of the chamber formed between the guide protrusion 1a and the guided part 3a the same as that of the pressure chamber A, an air vent groove is carved on the outer periphery of the guide protrusion 1a. There is.

A diaphragm groove 3b is cut in the outer circumferential portion of the guided portion 3a of the sliding rod 3, and is sandwiched therebetween to seal and fix the first diaphragm 2. Furthermore, a pressure chamber A-side stopper portion 3C is disposed on the outer circumference of the guided portion 3a, so that when the volume of the pressure chamber A becomes minimum against the compression spring 4,
The stopper portion 3C is configured to abut against the bottom of the first housing 1, and when the volume of the pressure chamber A is maximized by the compression spring 4, the stopper 6a disposed on the second housing 6 and the covered The guide portion 3a is configured to come into contact with a stopper 3d disposed on the outer periphery of the guide portion 3a. Note that the first diaphragm 2 converts the pressure in the pressure chambers A and B into negative pressure individually, so if only the pressure chamber B becomes negative pressure, the curved part of the first diaphragm 2 This prevents it from being reversed.

Therefore, the stopper part 3C that restricts the movement of the first diaphragm 2 acts as a self-limiting means, and the stopper part 3G is allowed to move by a distance L1. On the other hand, the inner peripheral part of the second diaphragm 7 is sandwiched between a diaphragm groove 8a carved in the outer peripheral part of the actuating rod 8, and the second diaphragm 7 is sealed and fixed. Furthermore, a stopper part 8b is disposed on the outer circumference of the actuating rod 8, and when the volume of the pressure chamber B becomes the minimum against the compression spring 9, the stopper part 8b stops at the second housing stop. It is configured to abut against the par 6a, and when the volume of the pressure nozzle j chamber B is maximized by the compression spring 9, it is fixed at the caulking part 8e after being inserted into the end of the guided part 8G of the operating rod 8. The stopper ring 8d is configured to abut against the hook portion 3e of the sliding rod 3.

The engagement between the stopper ring 8d fixed by the caulked portion 8e and the hook portion 3C of the sliding rod 3
This is done by pressing toward the slit portion 3f side (inside) carved in the slide rod 3, using the elasticity of the sliding rod 3. The guided portion 8C and the hook portion 3e are slidably engaged with each other in the central axis direction by the inner wall of the guided portion 8G, the knock portion 3e, the stopper ring 8d, and the sliding rod 3. -Also,
In order to prevent the outer periphery of the actuating rod 8 from coming into contact with the cover 11 and generating unpleasant noises if it is deformed during use during differential operation, an elastic member 8g is interposed between the two.

Therefore, the hook portion 3e of the sliding rod 3 attached to the first diaphragm 2 functions as a second diaphragm regulating means. Further, the second diaphragm 7 can slide the sliding rod 3 a distance L2 until the stopper part 8b and the stopper part 6a provided on the outer periphery of the actuating rod 8 come into contact with each other. However, its movement is restricted by the hook portion 3e of the sliding rod 3. That is, the stopper portion 8b functioning as the second diaphragm regulating means acts as a second diaphragm self-limiting means whose movement is restricted by the second diaphragm regulating means restrained by the sliding rod 3 attached to the first diaphragm 2. It is something.

Since this embodiment is constructed as described above, it operates as follows. In FIG. 1, when a negative pressure is applied to the vanes 1-5 of the pressure chamber Δ, the stopper portion 3C comes into contact with the bottom of the first housing 1. Therefore, the rod joint portion 8f of the actuating rod 8 moves a distance L1. Furthermore, when negative pressure is introduced into the vacuum boat 10 in the pressure chamber B, the stopper part 8b and the stopper part 6a come into contact with each other.

Therefore, the rod joint 8f of the actuating rod 8 has a distance L
You will have to move 2 times. And pressure chamber △ and pressure chamber B
When negative pressure is introduced into the vacuum boats 5 and 10, the distance 11
1iL1+12 will be moved.

FIG. 2 shows another embodiment of the present invention, and only the differences from the above-described embodiment of FIG. 1 will be described. In particular, this embodiment is characterized by its manufacturing process.

The sliding rod 21 is inserted into the indoor cylinder 22, and the convex portion 20a formed on the inner wall of the operating rod 20 and the sliding rod 21
It is locked with the hook part 21a at one end. Then, the space between the actuating rod 20 and the sliding rod 21 is sealed with an O-ring. A stopper portion 21b with a larger diameter is formed at the other end of the slide 11IO rod 21, and is configured to abut against a stopper portion 22a at the end of the guide cylinder 22. The other end of the guide cylinder 22 is sealed using a sealing material 23 and an O-ring 24. The sealing material 23 is fixed on the outer periphery of the guide cylinder 22 by caulking. The linear reciprocating actuator of this embodiment can operate as follows.

Figure 3 shows the car heater's wind defroster (Def
Roster) and room (room) air exhaust control roll] In this example, the engine water? flat
The temperature of the resistor RTh is detected by the thermistor RTh, and the temperature change is converted into a potential change by the resistor RO and a parallel circuit of the resistor r and thermistor RTh, and the output is detected by the resistor R1,
Threshold voltage VTI divided by R2 and R3, VT2. V
T3. ! = comparator Co1. When the engine water temperature is low, the output of OR2 is set to high level, and the vacuum valve B2 is set to l1il<, and the vacuum valve B2 connects the negative pressure source, For example, negative pressure in the intake manifold etc. reduces the pressure in the pressure chamber, and the actuating rod 8
moves by a distance of 11111LI. At this time, the warm air is sent only to the windshield defroster, causing it to crawl along the surface of the windshield. When the engine water temperature rises, only the output of OR1 becomes high level, vacuum valve B2 depressurizes only pressure chamber B, and actuating rod 8
moves by a distance L2, and warm air is sent to the defroster and room. Furthermore, as the engine water temperature rises, O
When the outputs of R1 and OR2 reach a high level, the vacuum valves B1 and B2 make the pressure chambers A and B negative pressure, and the operation moves (-8 is the distance L1 + 12), and hot air is mainly sent out from the room. I will do it.

In the embodiment of the present invention described above, negative pressure is introduced into the pressure chambers A and B to drive the actuating rod 20, but the compression springs 4 and 9 are changed to expansion springs. Therefore, it is controlled by positive pressure.

Further, although a housing is used in which the first housing 1 and the second housing 6 are separated, they may be integrally constructed as long as the difficulty of attaching the first diaphragm 2 is not considered a problem.

As described above, according to the present invention, the pressure chamber B and the pressure chamber B,
A first diaphragm self-regulating means, stage and second diaphragm regulating means attached to the first diaphragm constituting the pressure chamber A, and the second diaphragm self-regulating means attached to the second diaphragm constituting the pressure chamber B. The second diaphragm self-limiting means restricts the movement of the first diaphragm by the second diaphragm regulating means, which is restrained by the diaphragm regulating means, and the actuating rod transmits the drive to the outside, and the movement of the self-limiting means of the first diaphragm is Since the distance is not set to be the same as the moving distance of the second diaphragm regulating means, the negative pressure of the pressure vA, the negative pressure of the pressure chamber B, and the negative pressure of the pressure chamber A
The actuating rod attached to the second diaphragm is moved linearly in two or three stages by a combination of three types of negative pressure: negative pressure in pressure chamber B and negative pressure in pressure chamber B.

[Effects of the Invention] The present invention provides a second diaphragm that is restrained by the second diaphragm regulating means attached to the second diaphragm, such as a first diaphragm self-limiting means and a second diaphragm regulating means attached to the first diaphragm. Since the second diaphragm self-regulating means whose movement is restricted by the restricting means drives the actuating rod, there are two pressure chambers, [11] a pressure chamber formed by the first diaphragm, and a pressure chamber formed by the first diaphragm; Even in the pressure chamber formed between the first diaphragm and the second diaphragm, three types of displacement of the actuating rod can be obtained by combining the two chambers.

Moreover, the displacement can be set arbitrarily.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of one embodiment of the linear reciprocating actuator of the present invention, FIG. 2 is a cross-sectional view of another embodiment of the present invention, and FIG. 3 is a view showing the use state of one embodiment of the present invention. It is an explanatory diagram. In the figure, A...Pressure chamber B...Pressure chamber 1...First housing 1a...Guiding convex portion 2...First diaphragm 3...Sliding rod 6...Second housing 7.
...Second diaphragm 8...Operating rod In the drawings, the same reference numerals and the same symbols indicate the same or corresponding parts. Patent applicant: Aisin Seiki Co., Ltd. Representative: Takehisa Higuchi

Claims (1)

[Claims] a pressure chamber formed by the first diaphragm; a pressure chamber formed between the first diaphragm and the second diaphragm; a first diaphragm self-regulating means and a second diaphragm self-regulating means attached to the first diaphragm; It is composed of a second diaphragm self-limiting means whose movement is restricted by the second diaphragm restricting means attached to the second diaphragm restricting means, and an actuating rod that transmits linear reciprocating motion, and has three stages. A linear reciprocating actuator that is capable of displacement.