JPS6129404B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an airtight structure in which pressure is controlled on one side of the diaphragm by sandwiching the outer flange of the diaphragm on the outer periphery of each opening of a housing having an opening at one end and a cover having an opening at one end. The present invention relates to an actuator that forms a pressure chamber.

Conventionally, this type of device has had at least one of a housing with an opening at one end and a cover with an opening at one end formed of metal, and the outer periphery of the housing and the cover having an outer circumference attached to the flange of the other of the housing and the cover. Since the outer edge of the diaphragm was sandwiched by roll caulking, there was a drawback that the work time was long and the workability was extremely poor. Furthermore, in actuators manufactured by applying roll caulking, when the diaphragm is clamped along its outer edge, the outer edge of the diaphragm expands, causing wrinkles between the caulking start end and the caulking end. There was also the problem of poor airtightness.

SUMMARY OF THE INVENTION An object of the present invention is to provide an actuator that improves the workability of diaphragm clamping and is less prone to airtight failure.

Therefore, in order to eliminate the above-mentioned drawbacks, the present invention forms a plurality of elongated holes in the circumferential direction on the outer periphery of a substantially annular clamping member that is integrally connected to either one of the housing having an opening at one end and the cover having an opening at one end. , a caulking portion is formed only in an outer peripheral portion located from the elongated hole on the open end side of the other of the housing and the cover, and the caulking portion is provided on the other of the housing and the cover. A diaphragm disposed between the openings of the housing and the cover was clamped onto the bottom surface of the flange. A plurality of elongated holes are formed in the circumferential direction on the outer peripheral surface of a substantially annular clamping member integrally connected to either one of the housing and the cover, and a plurality of elongated holes are located from the elongated holes to the other open end side of the housing and the cover. The diaphragm disposed between the openings of the housing and the cover is clamped by caulking only the outer peripheral surface portion, and the outer peripheral surface portion is crimped to the bottom surface of the flange of the other opening of the housing and the cover. The diaphragm can be clamped by instantaneous caulking, which significantly improves work efficiency.Moreover, since the outer edge of the diaphragm is clamped evenly, there is no possibility of airtightness in the actuator. do not.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the apparatus of the present invention will be described below with reference to 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 clamping part is formed on the outer peripheral surface of the clamping part, and a plurality of long holes 12a are formed in the clamping part, and the long holes 12a are formed in the clamping part.
Only the outer circumferential surface portion 12b located on the open end side of the cover 12 is caulked to form a caulked portion, and the caulked portion 12b is attached to the flange bottom surface 11 of the opening of the housing 11.
By crimping a, the outer edge portion of the elastic diaphragm 13 disposed between the opening of the housing 11 and the cover 12 is clamped. In the embodiment, the elongated hole 12a is formed in a clamping part that is integrated with 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 in either of the two. It may also be formed on the outer circumferential surface of a metal member that is a substantially annular clamping member that is integrally secured to one side. A pressure chamber 14 is formed by the diaphragm 13 and the housing 11.
is formed. The central part of the diaphragm 13 is connected to the output end 16 together with the pressure plate 15.
It is caulked with a bet 16 having a shape. Pressure plate 15 and housing 11
There is a post 1 extending from the housing 11 inside the housing 11.
Yoke 1 made of magnetic material screwed to the tip of 7
A spring 19 is tensioned with one end fixed to the diaphragm 8, and the diaphragm 13 is pushed to the left position in FIG. 1 by the biasing force of the spring 19.
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 each have a coil 2 in a magnetic core 22 and 23 fixed to the yoke 18, respectively.
4, 25 are wound on non-magnetic bobbins 26, 27.
is installed. Further, flapper members 28 and 29 that are attracted to the cores 22 and 23 are connected to springs 30 and 29, respectively.
31, they are urged in a direction to separate from the cores 22 and 23, respectively. The flapper member 2
8 and 29 are magnetic movable plates 32 and 33, respectively.
and said core 22 of said plates 32, 33,
23 Non-magnetic flapper 3 fixed on the opposing surface side
Consists of 4,35. And Fratupa 34,
Predetermined through holes are formed in 35 so that each core and each movable plate can face each other. The flapper 34,
Valves 36, 37, 38,
39 is installed. A vacuum nozzle 40 and atmospheric nozzles 41 and 42 are formed in the housing 11, and the diameter of the atmospheric nozzle 41 is smaller than the diameter of the nozzle 42. And vacuum nozzle 4
0 has a valve 36, and atmospheric nozzles 41 and 42 have valves 38 and 39 facing each other, and nozzles 40,
41 and 42 are opened and closed by operating valves 36, 38, and 39. Vacuum nozzle 40 is port 4
2, negative pressure generated in the engine intake manifold (not shown) is introduced. atmospheric nozzle 4
1 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) coming from a connector 45 through three lead wires 46, 47, and 48. It is used as a ground wire. Three lead wires 46,4
7 and 48 pass through the housing 11, and since the penetration must be achieved while maintaining airtightness, a rubber seal bush 49 and a synthetic resin seal block 50 are used to connect the inside and outside of the housing 11. The sealing members 49 and 50 are embedded in the communicating holes 11a and the lead wires 46, 47, 48
The lead wires 46, 47, and 48 may be located on both the inner and outer sides of the housing 11 through the lead wires 46, 47, and 48. As shown in Figure 5, the seal bushing 49 is made of rubber and has holes 49a, 4 through which the lead wires 46, 47, 48 are press-fitted.
9b and 49c are formed, and after each lead wire is passed through these holes, the bush 49 is attached by being crimped to the opening of the housing 11 near the post 17.
The inside and outside of the housing 11 can be kept airtight.
Further, the seal block 50 is made of synthetic resin as shown in FIG.
A hole 51d through which the lead wires 47 and 48 are passed, and a groove 50a on one end of which guides the lead wires 46, 47 and 48, respectively.
50b, 50c, and shaft portions 50e, 50f are formed as attachment members for the yoke 18. Each lead wire 46, 47 connected to the coil 24, 25,
48 are grooves 50a, 50b of the seal block 50,
The lead wires 46, 47, and 48 are clamped so that they will not come off even if they are pulled by being guided by the lead wires 50c and pressed by the yoke 18 at their groove portions.

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, it is possible to reduce magnetic hysteresis during operation, and even if the excitation current of the coil 24 changes in a high frequency manner, the changing state remains unchanged. Following this, 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 as a filter cover to the right end surface of the housing 11 in the second figure. Atmosphere is housing 1
1 and the mounting bracket 57 between the walls 51 and 52.
from the gap between the wall portion 53 and the wall portions 54, 55, 5
It reaches atmospheric nozzles 41 and 42 through gaps such as No. 6 and filter 44 in sequence. Furthermore, the housing 11 is mounted on the mounting bracket 57 so that the left side in FIG. Therefore, the water drops between the walls 53 and 51 without penetrating toward the walls 54 and 56, or directly reaches the groove 51a and is discharged from the groove 51a to the outside of the housing 11, causing water droplets to adhere to the filter 44. This is prevented. solenoid valve 20,
The yoke 18 on which the valve assembly is assembled as a base plate of the housing 11 can be fixed at the tip of the post 17 extending from the housing 11 to the vicinity of the opening, thereby improving workability. Rubber cushioning materials 58 and 59 are attached to opposite ends of the flapper members 28 and 29 of the cores 22 and 23, respectively.
It is slightly protruding from the head of 3, and the flaps are 34 and 35.
hits the cushioning materials 58, 59 first, then the core 22,
It is designed to come into contact with the head of 23. cover 12
A chamber 60 formed by the diaphragm 13 and the diaphragm 13 communicates with the atmosphere. Output end 16 of rivet 16
A is a chain 6 connected to a control device (not shown).
1 is fixed.

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 is rotated counterclockwise in FIG. 36 separates from the vacuum nozzle 40 and becomes 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 refers to the counterclockwise rotation of the flapper member 28 as described above, which contacts the air nozzle 41 and switches the flapper member 28 to the closed state. is rotated clockwise in FIG. 3 with the yoke 18 as a fulcrum by the bias of the spring 30 to the state shown in FIG. 3, closing the vacuum nozzle 40 and opening the atmospheric nozzle 41
Switch to open. Therefore, a pressure corresponding to the output of the control circuit is generated in the chamber 14, and the diaphragm 13 and the pressure plate 15 are moved by the spring 1 according to the pressure difference between the chamber 60 and the chamber 14, which is atmospheric pressure.
It is displaced from the rest position shown in the second figure to the right in the figure 2 against the biasing force 9. Due to this displacement of the pressure plate 15 of the actuator 10, the rivet 1
6. The control device is controlled via the chain 61 according to the output of the control circuit. Next, actuator 1
When it is necessary to release the operation of the air conditioner 0, the output of the control circuit cuts off the current to the coil 24, closes the vacuum nozzle 40 by means of the flapper member 28, switches the atmospheric nozzle 41 to open, and outputs the control circuit to the coil 25. The flapper member 29 demagnetizes the coil 25 by cutting off the current to the yoke 1, and cancels the action of attracting the flapper member 29 to the core 23.
8 as a fulcrum and the second
As shown in the figure, the valve 39 separates from the atmospheric nozzle 42, opens the large-diameter atmospheric nozzle 42, introduces the atmospheric air from the atmospheric nozzle 42 into the chamber 14, rapidly brings the chamber 14 to atmospheric pressure, and presses the diaphragm 13, The actuator 10 can be deactivated without returning the shear plate 15 to the second illustrated position and can be immediately returned to the rest position, and the control device can also be returned to the rest position immediately to ensure safety.

As described above, according to the device of the present invention, a plurality of elongated holes in the circumferential direction are formed on the outer circumferential surface of the substantially annular clamping member integrally connected to either one of the housing and the cover. By caulking the outer circumferential surface portion located on the other open end side of the housing and the cover through the hole, and crimping the outer circumferential surface portion against the bottom surface of the flange of the other opening of the housing and the cover, the housing and the cover are connected. Since the diaphragm placed between the openings is clamped, the diaphragm can be clamped with instant caulking, which significantly improves work efficiency, resulting in excellent practical effects. play. Further, according to the configuration of the present invention, since the caulking portions for sandwiching the housing and the cover are scattered in the circumferential direction of the sandwiching member, stress applied to the bottom surface of the flange of the housing or the cover when caulking is performed. can be reduced. Therefore, even if the housing or cover is made thin, cracks will not occur, and furthermore, the outer edge of the diaphragm will be evenly clamped, making it difficult for sealing defects to occur.

[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, 1
2: Cover, 13: Diaphragm, 14: Pressure chamber, 12a: Long hole, 12b: Outer peripheral surface portion (crimped portion), 11a: Flange bottom surface.

Claims (1)

[Scope of Claims] 1. The outer edge portion of the diaphragm is sandwiched between the outer periphery of each opening of the housing having an opening at one end and the cover having an integral opening, so that the pressure is controlled on one side of the diaphragm in an airtight manner. In the actuator forming a chamber, a plurality of elongated holes are formed in the circumferential direction on the outer periphery of a substantially annular clamping member that is integrally connected to either the housing or the cover, and the elongated holes allow the housing to be inserted into the housing from the elongated holes. A caulking portion is formed only on an outer peripheral portion located on the open end side of the other of the housing and the cover, and the caulking portion is crimped to a bottom surface of a flange provided on the other of the housing and the cover; An actuator characterized in that a diaphragm is sandwiched between an opening of a housing and the cover. 2. The actuator according to claim 1, wherein the clamping member is integral with the housing. 3. The actuator according to claim 1, wherein the clamping member is integral with the cover.