DE102021103431A1 - Adjusting element of an air guiding element of a motor vehicle - Google Patents

Abstract

The invention relates to an adjusting element of an air guiding element of a motor vehicle, the position of the air guiding element (2) being adjustable relative to the motor vehicle (3) between a first position and a second position, the adjusting element (1) having a kinematic system of the air guiding element ( 2) is operatively connected, and wherein the actuating element (1) comprises a servomotor (4) and an actuating shaft (5), which is operatively connected to the kinematics and which are at least partially accommodated in a housing (6) of the actuating element (1). , and wherein a gear (9) is formed between the actuating shaft (5) and the servomotor (4), the gear (9) having at least one gear wheel (13; 15) which is mounted in the housing ( 6) is rotatably mounted. According to the invention, to reduce play in the gear (9), the bearing shell (16) is at least partially axially movable and at least partially preloaded in the housing (6).

Description

The invention relates to an actuating element of an air guiding element of a motor vehicle according to the preamble of patent claim 1.

Air guiding elements of motor vehicles are known. These air guiding elements, which are preferably arranged on the motor vehicle at the rear of the motor vehicle, have a profile which can be adjusted relative to the vehicle body between a retracted rest position and a maximum extended active position. Motor vehicles are known, for example, whose air guiding element, also known as a spoiler, can be lowered into the body and, in its operative position, are predominantly arranged outside of the body.

The air guiding elements are placed in their corresponding positions with the aid of an adjusting element and a kinematic system formed between the adjusting element and the air guiding element. Furthermore, the actuating element is used, in particular in the active position, for secure positioning of the air guiding element.

The disclosure document DE 10 2018 001 275 A1 an actuating element for adjusting an air guiding element in the form of a rear spoiler can be removed, the actuating element comprising an electric motor and a worm gear. To compensate for play in the worm gear, a rubber cylinder or a cylindrical compression spring is accommodated in an output shaft of the worm gear, the output shaft being designed to be separable into at least two parts for accommodating the elastic element and for axial mobility. A further possibility for compensating for the play is revealed by opposite pitch angles in the transmission parts involved.

From the DE 10 2018 132 356 A1 a wheel spoiler for front wheels of a motor vehicle is known, with freedom from play being achieved within a drive of the wheel spoiler with the aid of an overload clutch.

The disclosure documents DE 10 2018 119 906 A1 and DE 10 2012 221 023 A1 a rear spoiler drive for a rear spoiler of a motor vehicle can be removed, with a wrap spring arrangement being provided to reduce play.

The object of the present invention is to provide an improved control element of an air guiding element of a motor vehicle.

According to the invention, this object is achieved with an actuating element of an air guiding element of a motor vehicle with the features of patent claim 1 . Advantageous configurations with expedient and non-trivial developments of the invention are specified in the respective dependent claims.

An adjusting element according to the invention of an air guiding element of a motor vehicle is provided for adjusting the air guiding element, the position of which can be adjusted relative to the motor vehicle between a first position and a second position. For the setting, the actuating element is operatively connected to a kinematic system of the air guiding element. The actuating element comprises a servomotor and an actuating shaft which is operatively connected to the kinematics and which are at least partially accommodated in a housing of the actuating element. A transmission is formed between the actuating shaft and the servomotor, the transmission having at least one gear wheel which is rotatably mounted in the housing with the aid of a bearing shell. According to the invention, to reduce play in the transmission, the bearing shell is at least partially axially movable and at least partially preloaded in the housing.

In an advantageous embodiment, the bearing shell comprises a first bearing shell element and a second bearing shell element, with the gear wheel being arranged between the first bearing shell element and the second bearing shell element, with the first bearing shell element or the second bearing shell element being accommodated in the housing in an axially movable manner. In other words, this means that the gear wheel is mounted on both sides, whereby it is mounted securely in the axial direction and an inclination relative to its axis of rotation is avoided.

So that a secure axial prestressing of the gear wheel is realized, one of the two bearing shell elements can be moved axially and the other of the two bearing shell elements is fixed.

A spring element, which is designed in the form of a compression spring, is provided for prestressing.

If the gearing is a two-stage gearing, this can be accommodated in the housing of the actuating element in a space-saving and thus space-saving manner, with a sufficient transmission ratio for moving the air guiding element being able to be realized due to the two-stage nature.

The gear is preferably a helical gear, particularly preferably a worm gear, which is characterized by low noise compared to other types of gear.

The servomotor is preferably in the form of a direct current motor (also called a DC motor), in particular in the form of a brushless direct current motor (also called an EC motor). The brushless DC motor is lighter in weight than the brushed DC motor.

• 1 in einer perspektivischen Darstellung ein Heckausschnitt eines Kraftfahrzeugs aufweisend ein Luftleitelement, und
• 2 in einer Draufsicht einen Ausschnitt eines erfindungsgemäßen Stellelementes für das Luftleitelement gem. 1.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing. The features and combinations of features mentioned above in the description and the features and combinations of features mentioned below in the description of the figures and/or shown alone in the figure can be used not only in the combination specified in each case, but also in other combinations or on their own, without going beyond the scope of the leave invention. Show it:

• 1 in a perspective view, a rear section of a motor vehicle having an air guide element, and
• 2 in a plan view a section of an actuating element according to the invention for the air guide element gem. 1 .

An actuating element 1 according to the invention for an in 1 illustrated air guiding element 2 of a motor vehicle 3 is according to 2 educated. The actuating element 1 has an electrically operable servomotor 4, with the aid of which an actuating shaft 5 is designed to be movable. The control shaft 5 is mounted in a housing 6 of the control element 1 such that it can rotate about its longitudinal axis 7, with a first end 8 of the control shaft 5 and a second end of the control shaft 5 (not shown in more detail) projecting out of the housing 6 and being operatively connected to the air guide element 2 stand.

The rotational movement of the control shaft 5 is brought about with the aid of a gear 9 having two gear stages, a first gear stage 10 which is connected to the control shaft 5 and a second gear stage 11 which is connected to the servomotor 4 . The gear stages 10, 11 are each preferably designed in the form of a worm gear, which is characterized in particular by a low noise compared to other gear pairings, and a so-called gear worm and a so-called Gear wheel, low efficiency distinguishes. Thus, a first worm gear 12 and a first gear wheel 13 are assigned to the first gear stage 10 and a second worm gear 14 and a second gear wheel 15 are assigned to the second gear stage 11 .

The servomotor 4, which is designed in the form of an electric motor, is connected to a plug-like connection (not shown in detail) that is accommodated on the housing 6 for the energy supply. The servomotor 4 is preferably constructed in the form of a conventional DC motor or particularly preferably in the form of a brushless DC motor, since this is characterized by its low weight compared to the conventional DC motor.

The actuating element 1 according to the invention is basically designed for the secure positioning of the air guiding element 2 up to a maximum force acting on the actuating element 1, which can be referred to as the maximum load limit. In order to extend the air guiding element 2 , the actuating shaft 5 has a first rotation, whereas for retracting it has a second rotation, the reverse rotation, directed in the opposite direction to the first rotation about its longitudinal axis 7 .

The first gear wheel 13 and the second gear wheel 15 are accommodated in the housing 10 in a sliding bearing with the aid of bearing shells, a first bearing shell 16 of the first gear wheel 13 and a second bearing shell of the second gear wheel 15 (not shown in detail).

The first bearing shell 16 has a first bearing shell element 17, which is arranged facing away from the first end 8, and a second bearing shell element 18, which is arranged facing the first end 8, the first gear wheel 13 being positioned between the two bearing shell elements 17, 18.

In order to reduce play between the first gear wheel 13 and the first worm gear 12, the first bearing shell 16 is designed to be axially movable, with the aid of a spring element designed to exert an axial force 19 on the first bearing shell element 17, which spring element is designed, for example, in the form of a helical spring supported on the housing 10 can be carried out, is biased, and thus the first bearing shell element 17 against the first gear wheel 13 presses. Thus, the first bearing shell element 17 is spring-loaded. The spring element is designed in the form of a compression spring. For example, it could also be in the form of a disc spring.

Likewise, the second bearing shell element 18 could also be designed to be axially movable and pressed against the first gear wheel 13 with the aid of a spring element.

The secure positioning of the air guide element 2 can be supported by an efficiency-optimized gear 9, which is ins special characterized by an increase in frictional resistance of at least one of the two gear stages 10, 11.

Reference List

1

actuator

2

air deflector

3

motor vehicle

4

actuator

5

control shaft

6

Housing

7

longitudinal axis

8th

First ending

9

transmission

10

First gear stage

11

Second gear stage

12

First gear worm

13

First Gear

14

Second gear worm

15

Second Gear

16

First bearing shell

17

First bearing shell element

18

Second bearing shell element

19

axial force

QUOTES INCLUDED IN DESCRIPTION

This list of the documents cited by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent Literature Cited

• DE 102018001275 A1 [0004]
• DE 102018132356 A1 [0005]
• DE 102018119906 A1 [0006]
• DE 102012221023 A1 [0006]

Claims (6)

Adjusting element of an air guiding element of a motor vehicle, the position of the air guiding element (2) being adjustable relative to the motor vehicle (3) between a first position and a second position, the adjusting element (1) being operatively connected to a kinematic mechanism of the air guiding element (2) for adjustment stands, and wherein the actuating element (1) comprises a servomotor (4) and an actuating shaft (5), which is operatively connected to the kinematics, which are at least partially accommodated in a housing (6) of the actuating element (1), and wherein between between the control shaft (5) and the servomotor (4) a gear (9) is formed, the gear (9) having at least one gear wheel (13; 15) which is rotatably mounted in the housing (6) with the aid of a bearing shell (16). is characterized in that in order to reduce play in the transmission (9), the bearing shell (16) is accommodated in the housing (6) so that it can be moved at least partially axially and is at least partially prestressed. actuator after claim 1 , characterized in that the bearing shell (16) comprises a first bearing shell element (17) and a second bearing shell element (18), the gear wheel (13; 15) being arranged between the first bearing shell element (17) and the second bearing shell element (18), wherein the first bearing shell element (17) or the second bearing shell element (18) is accommodated in the housing (6) in an axially movable manner. actuator after claim 1 or 2 , characterized in that a spring element is designed in the form of a compression spring for prestressing. Adjusting element according to one of the preceding claims, characterized in that the gear (9) is a two-stage gear. Adjusting element according to one of the preceding claims, characterized in that the gear (9) is a helical gear, in particular a worm gear. Control element according to one of the preceding claims, characterized in that the control motor (4) is in the form of a direct current motor, in particular in the form of a brushless direct current motor.

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