DE202004006461U1 - Operating element with device for damped actuation has elastic roller element between operated and bearer elements in chamber(s) of defined length formed by pair of bearings in one of the elements - Google Patents

Abstract

The operating element has a device for damped operation of an element that can be displaced (1) or rotated relative to a fixed bearer element (2), at least one elastic roller element between the operated element and the bearer element in at least one chamber of defined length formed by a pair of bearings in one of the two elements.

Description

The invention relates to an actuator with a device for steamed activity a relatively displaceable or rotatable element relative to one stationary support element.

The term “actuator” is understood by the invention as adjusting wheels and / or Gate valve with mechanical and / or electrical control functions, which actuators can be operated by hand and from a front panel with the actuator or protrude with a partial circular section to be actuated to be able to. For electrical versions here come in particular switches, sliding resistors and Rotary potentiometers are considered for mechanical versions for example setting wheels or setting wheel segments or longitudinal slides in air nozzles, such as they are installed in motor vehicles to use the passenger compartment To supply fresh air or warm air. Such air jets point in the installation housing or horizontal and / or vertical slats which can be swiveled in an associated frame on that changeable in the angle of inclination are causing either an air flow through the air nozzle Outside can penetrate or in the closed state such an air flow is interrupted. Each intermediate position can also be taken.

With the mentioned sliding and Twisting elements are always provided in a stationary part. For example a grinder is provided with potentiometers, which is relatively a Resistance path sweeps over a disc. With sliding resistors again the slide with slide on a longitudinal guide becomes relative across from shifted a resistance coating. Grinders are provided on the slide, which take up an integrated resistance layer. at Switches, especially with rotary switches, are gradually switched from switched from one switch position to the other.

To exercise a continuous Torque or sliding torque are springs in such actuators provided between the sliding part and the support member clamped and along a sliding surface on the carrier element be passed by. The pressure forces that occur are dimensioned so that only a braking effect is achieved when moving becomes.

It has been shown that such Actuators that have a spring generate noise when moving can. It has also been shown that the relatively hard spring when mounting their ends are difficult to insert into corresponding images can be the one you want Ensure braking effect when moving.

The inserted springs work here as grinding brakes and possibly also as a catch, which is why they are in the end positions or snap into the recesses in the center positions and out of these by increased Force can slide out again. A desired light activity is inadequate with such grinding brakes. Furthermore, has shown that the springs are relatively large, so that such resilient Brake elements only in larger components can be introduced assembly is also extraordinary consuming.

The invention is based on illustrated prior art, the task of damping a generic actuator provide for easy actuation allows and noise by striking parts, such as those of a hard spring, as well as grinding noises.

The task is solved by design of the actuator according to the in Claim 1 specified inventive teaching.

Through the installation according to the invention a simple, permanently elastic, inexpensive rolling element as a molded part, for. B. a small ball or roller with material-related internal damping, into the bearing of the specified chamber in the control element a quiet damping and a constant pushing force or a constant one Torque of the control element achieved. By the defined length of the Chamber or the two chamber halves, that can be shifted against each other is the shift path at the same time also limited and given a soft end stop. It has showed that by using the rolling element, the practical rolls in the chamber during rotation and due to the material-related behavior dampens the shift, a very easy operation without sliding and scratching noises allows becomes. The end stop is cushioned and also damped. The Displacement is limited by the length of the chamber.

The operation of the invention can be seen from the 10 and 11 to explain. 10 shows the path / force diagram of a known actuation resistance. The actuation resistances of previous control elements are generated via Culomb friction (braking). The resistance itself is determined by the contact pressure and the friction factor due to the pairing. Are disadvantageous

• - limited sensitivity
• - scratch and sliding noises
• - hard, audible Attacks.

An additional installation of damping elements (Silicone damper) is not justifiable in terms of both installation space and cost.

11 shows the displacement / force diagram for an element according to the invention.

The growing demands on the actuation behavior are to be met by the material-related material damping with elastic deformation. For this purpose, small (inexpensive) "bearing elements" that are as rotationally symmetrical as possible are pressed (deformed) and in the direction of adjustment rolled (no gliding) or tumbled.

The rolling element forms a special steamed operating behavior (soft), combined with noise reduction, which is determined by the properties of the elastomer.

The desired damping can be ensured over many years by appropriate material quality of highly cross-linked elastomers. Natural or synthetic rubber is particularly suitable as a manufacturing material. The higher material costs are justifiable with the small part volume. Injectable elastomers such as TPU (Desmopan ^® ) can also be used in accordance with the usual requirements.

The actuation behavior is such. B. over subsequent Parameters determined:

• - material quality and hardness (approx. 60 ° shore A)
• - deformation (approx. 20% on ∅)
• - Shape of the rolling element (Ball, roller or also wavy Wälzschicht for oscillating actuation)
• - bearing pairing
• - Attack overflow chamber

The concrete functional relationships are dimensioning dependent.

The bearing pairing is the Assignment and execution of the guides and running chamber understood.

By one-sided or two-sided or by inserting recesses in the chamber walls can be very individual activities also be defined, e.g. B. can a damped stop on the limited running chamber and pinching of the rolling element at the end stop can be achieved, a muted one Locking is possible by introducing at least one locking recess.

The running chamber is so closed in profile shape that the rolling element remains positioned in a functional position. activities for one special mounting positions are not required. The rolling element positions itself automatically when approaching the end positions.

It can be seen that an assembly with the attenuator equipped actuator extremely is simple. Only the slightly compressible ball has to be assembled be inserted into the running chamber or an integrated running groove, when the two parts are joined together.

Advantageous further developments of Invention are in the subclaims specified in detail. For example, the invention used in a sliding element that one on a slat air nozzle is attached, so can longitudinal both in the wall of the slat and in the wall of the sliding element longitudinal recesses be introduced, which together form a storage chamber, the a half of the storage chamber across from the other is relatively displaceable and the total length of the shorter Storage chamber half determines the maximum displacement. Such a sliding element is expedient divided longitudinally so that the slat can be inserted. The chamber halves are set congruently so that the rolling element is inserted and then the second half of the sliding element can be. With appropriate push button connections or other locking connections become both halves connected with each other. The rolling element circulated So when moving on the front side walls of the Chamber along. About that In addition, the distance to the inner surfaces of the two halves of the Sliding element chosen so be that when squeezing of the two halves a pressure force is also exerted on the ball. So it must always two walls form the chamber to the desired relative Ensure torsion.

When inserting the rolling element in a chamber or bearing in a rotating element that acts as an actuator Is used, this is done in the same way. Also recommends it to form the setting wheel so that two arc sections an outer wheel with an inner wheel form a chamber into which the ball is inserted is. Such an actuator can also be an actuating wheel, for example for the slat arrangement an air nozzle be in a motor vehicle. about the adjusting wheel can also be operated an internal air flap in the housing.

The invention is described below of the exemplary embodiments illustrated in the drawings.

The drawings show:

1 a sliding element on a lamella, as is used in air nozzles to discharge the emerging air from a housing, the lamella being shown in abbreviated form,

2 on average the in 1 illustrated lamella with drawn chamber and spherical damping element during the damped run,

3 the element after 2 with soft stop,

4 . 5 and 6 a round actuator with an inserted damping element, as is used, for example, in air nozzles for controlling vertical slats in the housing or for controlling an air flap in the interior of the housing,

7 a simplified representation of a one-sided design with sliding pairing,

8th a simplified representation of a two-sided chamber version with smooth damping

9 an example of a damped detent,

10 a path / force diagram of a conventional braking element and

11 a path / forces diagram of a he damping element according to the invention.

In the embodiment according to 1 is an actuator in a perspective view 1 Shown in the form of a sliding element that is slidable on a horizontal slat 2 is arranged in a housing of an air nozzle. The sliding element on the back 1 a power transmission element 7 on that with the molded fork 8th on a vertical slat in the housing - not shown - can be placed, so that by moving the sliding element 1 on the horizontal slat 2 pivoting of the vertical slat can be effected. The arrangement according to 1 is in the 2 and 3 shown in section. The sectional drawings show that on the power transmission element 7 a feather 9 presses, which is designed as a spring and into the horizontal slat, the support element 2 , is used. As a result, a spring force is exerted on the carrier element 2 serving slat exercised, on the other hand, an alignment of the power transmission element takes place 7 , According to the invention there is now a chamber on the other side of the lamella 4 arranged from a first chamber half in the carrier element 2 and a second chamber half in one wall 10 of the sliding element 1 consists. The two halves are congruent in 3 shown and thus form the chamber 4 , in which the ball designed according to the invention 3 is made of elastic material, e.g. B. of highly cross-linked polymer or rubber, and at least on the two side walls 5 and 6 rolls off when the sliding element 1 on the slat to the left or right. The sliding path corresponds approximately to the lengths of the chamber cutouts joined together. The chamber cutouts are limited by side stops, which also limits the overall displacement. The ball can now also be so large and thus also the chamber width that it can also be on the inside of the two halves of the sliding element 1 is present if these are composed. However, this concern is not absolutely necessary. The only important thing is that there is contact on at least two sides of the two corresponding elements. Now becomes the sliding element 1 shifted to the left what from 2 can be seen, the rolling ball reaches the corner area and causes a damped stop, as well as a slight actuation in the other direction.

The example in the 4 . 5 and 6 shows a rotary element instead of a sliding element, which is also here with the reference numeral 1 is shown provided. This rotating element is located on the side of a housing 11 an air nozzle that can be used in a motor vehicle. There is a flap inside the housing 12 via positive feedback, for example from the rotary element 1 , can be operated. This rotating element too 1 has the inventive design of the attenuator.

In 5 is visible in a simple representation that a chamber 4 through two wall sections, namely the side walls 5 and 6 , is formed. There is a ball in this chamber 3 inserted, which works in the same way as that in the embodiment according to 1 . 2 and 3 , The only difference is that the chamber or the side walls delimiting it 5 and 6 are arranged on a circular path. The end position in left turn is in 5 shown, the center position in 6 , There is also a spring here 9 additionally provided, but which is not relevant to the invention. The actuator is about an axis 13 rotatable so that it looks like 6 can be seen from the center position both to the right and to the left relative to a support element, namely the housing 11 , can be twisted.

The 7 shows a simplified structure of a sliding element 1 on a carrier element 2 , In the carrier element 2 is a chamber on one side 4 provided to form the sliding pairing with the upper shell of the sliding element 1 corresponds. The side wall of the chamber 6 is therefore on the support element 2 and the side wall 5 of the sliding element 1 opposite. The chamber thus formed is limited by side stops. The roller element shown 3 is shown compressed and rolls when the sliding element moves 1 on the support element 2 in the sliding direction and causes a constant sliding torque and a damped stop in the end position.

8th shows an embodiment in which two chambers 4 are provided in the same way as in 7 is shown. These two chambers 4 are on both sides of the support element 2 provided so that the smaller rolling elements located therein 3 act damping on both sides of the support element, which results in a smooth, floating movement of the sliding element 1 is made possible.

9 shows a variant according to the representation 7 , It is centered in the opposite side walls 6 and 5 the chamber 4 one recess each 14 introduced into the damping the rolling element 3 engages in the middle position, so that a soft locking is also possible.

The diagrams in the 10 and 11 are already given in the description. 10 shows the path / force diagram of an operating element with a spring for generating a braking effect when actuating a sliding or rotating element, 11 a path / force diagram according to the invention, using an elastic rolling element. The central deviating curve shows the case where a notch is inserted.

1

sliding element

2

support element

3

rolling

4

chamber

5

Side wall

6

Side wall

7

Power transmission element

8th

fork

9

feather

10

wall

11

casing

12

flap

13

axis

14

recess

Claims (10)

Actuator with a device for damped actuation of a relatively displaceable or rotatable element relative to a fixed support element, as characterized in that between the sliding - ( 1 ) or rotating element and the fixed support element ( 2 ) at least one elastic rolling element ( 3 ) in at least one chamber formed from a pair of bearings ( 4 ) defined length in one of the two elements ( 1 . 2 ) or in at least one of the two elements ( 1 . 2 ) formed chamber ( 4 ) is inserted, at least on two opposite side walls ( 5 . 6 ) the chamber ( 4 ) on the two elements ( 1 . 2 ) is applied, the diameter of the rolling element ( 3 ) is chosen so large that it is subject to increased friction on the side walls ( 5 . 6 ) rotates when moving and dampens movement using its own elasticity. Device according to claim 1, characterized in that the rolling element ( 3 ) is a ball or a roller or an insert, in particular a corrugated insert. Device according to claim 1, characterized in that the chamber ( 4 ) of three or four side walls ( 5 . 6 ) is formed, with three walls the sub-chamber, preferably in the sliding element ( 1 ), and a side wall forms the partial chamber in the fixed support element ( 2 ) limited or vice versa. Device according to claim 1 or 3, characterized in that the rolling element ( 3 ) consists of elastic plastic, preferably of highly cross-linked, synthetic rubber or a polymer, in particular TPU or TPE. Device according to claim 1, characterized in that the rolling element ( 3 ) is used as an attenuator in a chamber in a sliding element which is placed on a lamella in an air nozzle and, when actuated, other elements of the air nozzle are controlled via positive feedback elements. Device according to claim 1, characterized in that the rolling element ( 3 ) is used as an attenuator in a chamber on a circular path in a rotary element. Device according to claim 6, characterized in that the rotary element is an actuator in an air nozzle arrangement in an air nozzle is how they are contained in the motor vehicle. Device according to one of the preceding claims, characterized in that the chamber ( 4 ) on one or both sides on a carrier element ( 2 ) is provided and that the side walls one or two sliding pairings for the rolling element ( 3 ) form. Device according to one of the preceding claims, characterized in that at least in one of the side walls ( 5 . 6 ) the chamber ( 4 ) a recess ( 14 ) as a recess for the rolling element ( 3 ) is introduced. Device according to claim 1, characterized in that the displacement path by stops in the chamber ( 4 ) is limited.