DE2710460A1 - ACTUATION DEVICE - Google Patents

Description

PATENT LAWYERS

A. GRÜNECKIHR

O*. ! NC.

H. KINKELDCY

IM -ING.

W. STOCKMAIR DR -ING. A, · = 'CAL' ^ iX

K. SCHUMANN

on «λ rur otPL om'S

P. H. JAKOB G. BEZOLD

OR REH NAT αΚ.-0-tfaM

8 MUNICH

MAXIMIUANSTRASSE

P 11

March 10, 1977

Nissan Motor Coapanj ?, Limited

No. 2, Takara-.T.achi, Kanaga ^T wa-ku, Yokohama Citj, Japan

Actuator

The invention relates to an actuator and in particular provides an actuator qit a membrane and a body arranged on one side thereof for reducing the volume of a Chamber on the relevant side of the membrane.

709837/0960

TELEPHONE (OSS)

TELEX 0 (1-39340

TELEQ COMB ΜΟΝΛΡΑΤ TELECOPER

In an actuating device with a housing, the Iimenraum by a movable partition, such as a Membrane or a bellows in a constant pressure box and a variable internal pressure chamber is partitioned and operated when the Pressure difference between the constant pressure chamber and the chamber with variable internal pressure a predetermined Value reached, elapses from the beginning of the supply of the chamber set up for variable internal pressure usually a considerably long time for the pressure differential to reach the predetermined value.

An object of the invention is to provide an actuator, at which the volume of the Kanuasr change with variable internal pressure without significant changes to the individual parts of the actuating device leaves.

In particular, the invention provides a device for changing the response time of an actuating device, so that it can be used for various purposes without any noteworthy changes to its parts. The actuation device has a membrane which divides the interior of a housing into an atmospheric chamber and a vacuum chamber divided, and an actuating rod connected to the membrane and movable together with it. To shorten it the response time of the actuating device, a body is arranged within the vacuum chamber, which their volume is reduced.

According to the invention, an actuating device of the type mentioned is characterized by a housing a partition arranged in the housing, which its interior divided into a constant pressure chamber and a chamber with variable pressure and depending on pressure differences between the constant pressure chamber and the chamber with

709837/0960

-J _

variable pressure is movable by a connected to the partition wall and movable by means of the same Actuating rod und.by a body arranged in the chamber with variable internal pressure for changing the volume of the same.

In the following an embodiment of the invention is described with reference to the drawing, the only figure of which is a Represents a sectional view of an actuating device according to the invention.

The actuating device shown has a housing 1 made up of two bowl-shaped shells which lie against one another with their open ends. The interior of the housing 1 is divided by a membrane 2 into an atmospheric chamber 3 and a negative pressure chamber M- . A compression spring 5 arranged in the atmospheric chamber 3 loads the membrane into the position shown. The atmospheric chamber 3 is connected to the free environment via a line 6. The vacuum chamber M- can be connected to a vacuum source, such as the intake manifold of an internal combustion engine, via a vacuum line 7. The vacuum line 7, which is connected at one end to the intake manifold or the like, is sealingly connected to the vacuum chamber 4 at the other end.

A connecting or operating rod 8 is attached at one end in the middle of the membrane. An adjusting bolt 9 is screwed into the other end of the rod 8, and a fork 10 is screwed onto its free end. A coupling lever or the like is articulated on the fork 10, for example, so that the fork 10, the actuating rod 8 and thus also the membrane 2 are loaded to the left in the drawing by a coupling spring or the like. The membrane 2 has a flexible wall 2 ¹ , which with its outer edge between the two bowl-shaped parts of the housing 1 and with its middle part

709837/0960

between a support plate 2 "and a holding plate 2" ' is clamped so that the support plate and the holding plate within the housing 1 are movable.

On the side of the membrane facing the vacuum chamber 4 2, an elastic body 11 for reducing the volume of the vacuum chamber 4 is attached. the The shape and dimensions of the body 11 are chosen so that the volume of the vacuum chamber 4 to each desired dimension is reduced. The body 11 is preferably solid because it would be hollow or, for example, made of one Closed cell foam, it would expand due to the negative pressure created in chamber 4, and if it were made of an open-cell foam, so it would not significantly reduce the volume of the vacuum chamber 4. On the other hand, the body 11 however, it can also be hollow, provided it is made of a sufficiently rigid material so that it can be exposed to the action of the negative pressure in the chamber 4 can not expand.

Since in the embodiment shown the support plate 2 ″ and the holding plate 2 ″ ¹ cannot be bent and only the flexible wall 2 ^{1 is} deformed during an actuation process, the body 11 used to reduce the volume can be either elastic or stiff.

The housing 1 carries a socket 12 for an actuating switch, which in certain positions of the actuating rod 8 can be actuated. The housing 1 also has a screw 13 for its attachment and is through a Bellows 14 secured against the ingress of dust.

With an actuator of the type described above, the delay between the beginning the supply of the negative pressure to the negative pressure chamber 4 and the start of the actuation movement of the actuation rod 8

709837/0960

without any change in the amount supplied per unit of time Adjust the vacuum volume as required, since the Actuating rod 8 of the actuating device equipped with the volume-reducing body 11 in comparison to which such without the body 11 begins to move early after the chamber 4 only a relatively small volume of vacuum was applied.

The invention is not limited to the embodiment described above, but extends, for example also on versions in which the diaphragm or the like is replaced by a bellows and a volume-reducing body 11 is attached to the negative pressure side of the bellows.

Thus, the invention enables a change in the Response time of a conventional actuator. This can reduce the response time of the actuator be adapted to the most diverse purposes, so that about the housing of actuators for different Uses by means of the same molds or the like. Can be produced, which increases the manufacturing costs can be lowered considerably.

709837/0960

Blank page

Claims (4)

PATE NT / \ NWÄLTE A. GRLINECKER 2710A60 H. KIiSIKELDEY
ΓΗ. ^ W. STOCKMAIR K. SCHUMANN DH rfhR ΓιΑΓ OPL. fWrS. P. H. JAKOB DiPL INT. G. BEZOLD cw Uta. "Ji- cn«, -c ««. 8 MUNICH 22 MAXIMILIANSTriASSS 43 P_a t_e 5_t_a_n_s j> r ü c_h e Actuating device, characterized by a housing (1), by one of the Innenrauai des Housing in a constant pressure chamber (3) and a chamber with variable internal pressure (4) dividing wall (2), which depends on the pressure differences between the constant pressure chamber and the chamber with variable Internal pressure can be moved by a motion-transmitting connected to the wall and by means of this movable actuating rod (8, 9 »10), and by one arranged in the chamber with variable internal pressure Body (11) for changing their volume. 2. Actuating device according to claim 1, characterized in that the body (11) on the the chamber (4-) with variable internal pressure facing side of the wall (2) is attached. 3. Actuating device according to claim Λ or 2, characterized in that the body (11) is made of a solid material. 4. Actuating device according to claim 1, 2 and / or 3, characterized in that the body (11) 709837/0960 ORIGINAL INSPECTED telephone (oae) aaaseQ telex os-aeaeo telegrams monapat telekopisrcr is made of a material having cavities, the volume of which depends on changes in pressure in the canine is not changeable with changing internal pressure. 709837/0960