JPS6134562B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an actuator in which each nozzle communicating with the atmosphere and vacuum is formed at the bottom of a housing with one end open.

In this type of equipment, in order to secure the valve device that opens and closes each nozzle to the housing, the valve device must be secured from the opening of the housing to the bottom of the inner circumference of the housing, which significantly reduces work efficiency. It had the disadvantage of being inferior.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an actuator that can improve the workability of fixing a valve device in a narrow housing.

The technical means taken to achieve the above object includes a housing having an opening at one end, a cover whose outer edge is clamped to the opening of the housing and forming an internal space together with the housing, and a cover that forms an internal space together with the housing. a diaphragm divided into an atmospheric chamber and a pressure chamber and biased by a spring, an atmospheric nozzle provided at the bottom of the housing and communicating with the atmosphere, and also provided at the bottom of the housing, The actuator comprises a vacuum nozzle communicating with a negative pressure source, the atmospheric nozzle, and a valve device for opening and closing the vacuum nozzle, and displaces a diaphragm according to the pressure of the pressure chamber. A substantially cylindrical post integrally formed with the housing is provided so as to extend from the bottom of the housing to near the opening, and the valve device is secured to the open end of the post, and the inner periphery of the post is fixed. The reason is that it is stored in

In the present invention, by providing a substantially cylindrical post on the inner periphery of the housing, after the valve device is housed in the inner periphery of the post, the valve device can be fixed to the open end of the post. The work of fixing inside the small housing can be done through the opening of the housing, improving work efficiency.

An embodiment of the apparatus of the present invention will be described below based on the drawings.

The actuator 10 has an outer edge portion of a diaphragm 13 clamped between a synthetic resin housing 11 with an open end and a metal cover 12, and the clamping is carried out by the cover 12 as shown in FIGS. A plurality of long holes 12a are formed in the outer peripheral surface of the housing 11, and only the outer peripheral surface portion 12b located on the open end side of the cover 12 from the long holes 12a is caulked, so that the outer peripheral surface portion 12b becomes the flange bottom surface 11a of the opening of the housing 11. By crimping, the outer edge portion of the elastic diaphragm 13 disposed between the openings of the housing 11 and the cover 12 is clamped. In the embodiment, the elongated hole 12a is formed in the metal cover 12, but the elongated hole 12a does not need to be formed in the housing 11 or the cover 12.
For example, it may be formed on the outer peripheral surface of a substantially annular metal member that is integrally secured to either one of the two. A pressure chamber 14 is formed by the diaphragm 13 and the housing 11. The central part of the diaphragm 13 is a pressure plate 15
It is caulked with a rivet 16 having an output end 16a. Pressure plate 1
5 and the inside of the housing 11 is tensioned with a spring 19 whose one end is locked to a yoke 18 made of a magnetic material screwed to the tip of a post 17 extending from the housing 11, and the biasing force of the spring 19 The diaphragm 13 is pushed to the left position in FIG. The yoke 18 is fixed to the housing 11 by fixing it to the post 17 extending from the bottom of the housing 11, so that the yoke 18 is fastened to the housing 11 rather than being screwed at the bottom of the housing 11. This makes the tightening work easier. Two solenoid valves 20 and 21 are arranged in parallel on the yoke 18, as shown in the fourth figure. The solenoid valves 20 and 21 have magnetic cores 22 and 2 fixed to the yoke 18, respectively.
3 are fitted with non-magnetic bobbins 26 and 27 around which coils 24 and 25 are wound. Furthermore, the core 2
The flapper members 28 and 29 attracted to the core 2 and 23 are biased by the springs 30 and 31, respectively.
2 and 23 in the direction of separation. The flapper members 28 and 29 are connected to magnetic movable plates 32 and 33, and the plates 32 and 33 respectively.
It is composed of flappers 34 and 35 made of non-magnetic material fixed to the opposing surfaces of the cores 22 and 23. Predetermined through holes are formed in the flappers 34 and 35 so that each core and each movable plate can face each other. A valve 3 is provided at both ends of each of the flappers 34 and 35.
A vacuum nozzle 40 and an atmospheric nozzle 4 are attached to the housing 11 to which the 6, 37, 38, and 39 are attached.
1 and 42 are formed, and the diameter of the atmospheric nozzle 41 is configured to be smaller than the diameter of the nozzle 42. The vacuum nozzle 40 has a valve 36 facing it, and the atmospheric nozzles 41 and 42 have valves 38 and 39 facing each other.
It is opened and closed by the operation of 39. Vacuum nozzle 40 introduces negative pressure generated into an engine intake manifold (not shown) from port 43. The atmospheric nozzles 41 and 42 communicate with the atmosphere through an air filter 44. The coils 24 and 25 are energized by the output of a control circuit (not shown) connected to the connector 45.
This is done via three lead wires 46, 47, 48, and the lead wire 48 is connected to both coils 24,
25 common ground wire. The three lead wires 46, 47, and 48 pass through the housing 11, and the penetration must be achieved while maintaining airtightness. The sealing members 49 and 50 are embedded in the hole 11a that communicates the inside and the outside with the lead wires 46 and 4.
The lead wires 46, 47, 48 can be located on both the inner and outer sides of the housing 11 by penetrating through the leads 7, 48. The seal bushing 49 is made of rubber and has holes 4 through which lead wires 46, 47, and 48 are press-fitted, as shown in Figure 5.
9a, 49b, 49c are formed, and the bush 49
After each lead wire is passed through these holes, it is crimped and attached to the opening of the housing 11 near the post 17, so that the inside and outside of the housing 11 can be kept airtight. Further, as shown in FIG. 6, the seal block 50 is made of synthetic resin and fits into the protrusion 49d of the seal bushing 49, and has a hole 50d through which the lead wires 46, 47, and 48 are passed, and a lead at one end thereof. Grooves 5 for guiding the wires 46, 47, 48, respectively
0a, 50b, 50c, and shaft portions 50e, 50f are formed as attachment members for the yoke 18.
Each lead wire 46 connected to the coils 24, 25,
47 and 48 are grooves 50a and 5 of the seal block 50.
0b and 50c, and are pressed by the yoke 18 at the groove portions,
The lead wires 46, 47, and 48 are clamped so that they will not come off even if they are pulled.

The flapper members 28 and 29 have similar configurations, and to explain the flapper member 28 as a representative, the flapper member 28 is formed of a magnetic movable plate 32 and a non-magnetic material as shown in FIG. The flapper 34 is caulked to the movable plate 32, and the movable plate 32 has a groove 32 that loosely fits into the yoke 18.
a and 32b, and these grooves define the hinge position at which the flapper member 28 swings against the bias of the spring 30 when the coil 24 is energized. and,
The flapper member 28 is located at the hinge position and at the core 22.
Since a non-magnetic material, that is, a flapper 34 is interposed at a position facing the coil 24, magnetic hysteresis during operation can be reduced, and even if the excitation current of the coil 24 changes in a high frequency manner, it can follow the changing state. As a result, the responsiveness of the flapper 34 can be improved. The second illustrated right end surface of the housing 11 has wall portions 51, 52, 53, 54, 55, 56 as shown in the eighth figure.
is bored, and the above-mentioned air filter 44 is fitted into a position surrounded by the walls 52, 54, 55, and 56. Grooves 51a and 51b are formed in the wall portion 51. A mounting bracket 57 shown in the first figure is screwed to the right end surface of the housing 11 as a filter cover in the second figure. The atmosphere flows between the housing 11 and the mounting bracket 57 through the gap between the walls 51 and 52, through the gap between the walls 53, the walls 54, 55, 56, etc., and through the filter 44 to the atmosphere nozzle 4.
It reaches 1,42. Furthermore, the housing 11 is mounted on the mounting bracket 57 so that the left side in FIG. , 56 without entering the wall portions 53 and 51.
or directly reaches the groove 51a.
Water droplets are prevented from being discharged from 1a to the outside of the housing 11 and adhering to the filter 44. Yoke 1 with valve assembly assembled as a base plate for solenoid valves 20 and 21
8 can be secured with the tip of the post 17 extending from the housing 11 to the vicinity of the opening, improving workability. At opposite ends of the flapper members 28 and 29 of the cores 22 and 23, rubber cushioning materials 58 and 59 protrude slightly from the heads of the cores 22 and 23, and the flappers 34 and 35 are attached to the cushioning materials 55 first.
8 and 59, and then the heads of the cores 22 and 23. A chamber 60 formed by the cover 12 and the dia 13 communicates with the atmosphere. A chain 61 connected to a control device (not shown) is fastened to the output end 16a of the rivet 16.

The apparatus of the present invention has the structure as described above, and its operation will be explained below.

When the coil 25 is kept energized,
The core 23 exerts a suction effect on the flapper member 29, and the flapper member 29 rotates counterclockwise in FIG. atmospheric nozzle 4
2 to maintain the closing action of the atmospheric nozzle 42.

During normal operation, the coil 2
4 is repeatedly energized and de-energized, and when energized, the flapper member 28 rotates counterclockwise in FIG. separates from the vacuum nozzle 40 and moves to the vacuum nozzle 4.
0 is opened to introduce negative pressure into the chamber 14, and the valve 3 is opened to introduce negative pressure into the chamber 14.
Reference numeral 8 denotes a flapper member 28 that contacts the air nozzle 41 and switches to the closed state by rotating the flapper member 28 in the counterclockwise direction.
The suction action of 2 disappears, and the flapper member 28 rotates clockwise in FIG. 3 with the yoke 18 as a fulcrum under the bias of the spring 30, resulting in the state shown in the third diagram.
The vacuum nozzle 40 is closed and the atmospheric nozzle 41 is opened. Therefore, a pressure corresponding to the output of the control circuit is generated in the chamber 14, and the diaphragm 1
3. The pressure plate 15 is displaced from the rest position shown in the second figure to the right in the second figure against the bias of the spring 19. By this displacement of the pressure plate 15 of the actuator 10, the control device is controlled via the rivet 16 and the chain 61 in accordance with the output of the control circuit. Next, when it is necessary to release the actuation of the actuator 10, the output of the control circuit cuts off the current to the coil 24 and the flapper member 28
Closes the vacuum nozzle 40 and closes the atmospheric nozzle 4.
1 to open, the output of the control circuit cuts off the current to the coil 25, demagnetizes the coil 25, cancels the action of attracting the flapper member 29 to the core 23, and causes the flapper member 29 to move around the yoke 18 as a fulcrum. Due to the bias of the spring 31, the valve 39 is separated from the atmospheric nozzle 42 as shown in the second figure, opening the large diameter atmospheric nozzle 42, and opening the atmospheric nozzle 42.
Atmospheric air is then introduced into the chamber 14, and the chamber 14 is brought to atmospheric pressure at a rapid rate, and the diaphragm 13 and the pressure plate 15 are returned to the second illustrated position, the actuator 10 is deactivated, and the actuator 10 is immediately returned to the rest position. This means that the control device can immediately return to the hibernation state to ensure safety.

As described above, according to the device of the present invention, a substantially cylindrical post extends from the bottom of the housing to the vicinity of the opening of the housing on the inner circumferential side of the housing, which has respective nozzles communicating with the atmosphere and the vacuum at the bottom. A valve device that is formed integrally with the housing and that can open and close the nozzle is fixed to the open end of the post and housed in the inner periphery of the post by the fastening, thereby making the valve device narrow. The diaphragm is housed between the inner periphery of the housing and the outer periphery of the post, so the diaphragm does not interfere with the valve device. This allows the actuator to be moved in a radial direction by eliminating redundant space. It has excellent practical effects such as:

Furthermore, since the valve device is fixed to the post, the valve device can be fixed using means such as tapping screws without losing the airtightness of the bottom of the housing. Since the actuator can be made thinner, the actuator can be made smaller in the axial direction.

[Brief explanation of the drawing]

1 is a plan view of an actuator that is the device of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view of FIG. 1, and FIG. 4 is a cross-sectional view of FIG. 5A is a plan view showing an embodiment of the seal block, FIG. 5B is a sectional view of FIG. 5A, FIG. FIG. 7 is a plan view of the flapper member, and FIG. 8 is a diagram illustrating the mounting position of the filter on the housing. 10: Actuator, 11: Housing, 4
0: Vacuum nozzle, 41, 42: Atmospheric nozzle, 17: Post, 20, 21: Solenoid valve.

Claims (1)

[Claims] 1. A housing with an open end, a cover whose outer edge is clamped to the opening of the housing and which forms an internal space together with the housing, a cover which divides the internal space into two, an atmospheric chamber and a pressure chamber, and a spring. an atmospheric nozzle located at the bottom of the housing and communicating with the atmosphere; a vacuum nozzle also located at the bottom of the housing and communicating with a negative pressure source; In the actuator, which has a valve device for opening and closing a vacuum nozzle, and displaces a diaphragm according to the pressure in the pressure chamber, the actuator is provided on the inner peripheral side of the housing so as to extend from the bottom of the housing to the vicinity of the opening. An actuator comprising a substantially cylindrical post integrally formed with a housing, the valve device being fixed to an open end of the post, and the valve device being housed in the inner periphery of the post.