WO2018036584A1

WO2018036584A1 - Actuator device for adjusting the height of a vehicle body

Info

Publication number: WO2018036584A1
Application number: PCT/DE2017/100659
Authority: WO
Inventors: Christian Harkort; Jörg Peter
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2016-08-26
Filing date: 2017-08-04
Publication date: 2018-03-01
Also published as: DE102016216056A1

Abstract

The invention relates to an actuator device for adjusting the height of a vehicle body, comprising a rotatable drive pinion (1), which is connected at least indirectly to a rotatable output gear (2), wherein the output gear (2) is connected to a sun gear (3) for conjoint rotation, and wherein the drive pinion (1) is connected at least indirectly to a blocking unit (4), wherein the blocking unit (4) has a rotatable blocking arm (5), which is provided for engaging in the sun gear (3) in order to block rotational motion of the output gear (2).

Description

Actuator device for height adjustment of a vehicle body

The invention relates to an actuator device for height adjustment of a vehicle body. The height adjustment of vehicle bodies serves to increase the ground clearance of motor vehicles and to lower them on level roadways. For this purpose, for example, a height adjustment device is provided in the struts of the motor vehicles, which comprises an actuator device, wherein the height adjustment device is operated by means of the actuator device. For example, DE 10 2014 209 939 A1 discloses an embodiment for a gear arrangement or an actuator device with a blocking function. The gear arrangement has a drive wheel, which is arranged rotatably about a drive axis and which has a drive toothed section in the direction of rotation. Further, the transmission assembly includes a driven gear rotatably disposed about an output shaft and having a driven gear portion in the circumferential direction, wherein the drive gear portion and the driven gear portion are engageable with each other by rotation of the drive gear such that the gear assembly is in a drive state. In this case, the drive wheel has a drive locking section and the driven gear has an output drive cutaway. The drive-locking portion and the driven-off portion are engageable with each other by further rotation of the drive wheel from the driving state, so that the gear assembly is in a locked state. The object of the present invention is to propose an embodiment for an actuator device with a blocking function. This object is achieved by an actuator device having the features of claim 1. Preferred or advantageous embodiments of the invention will become apparent from the dependent claims, the following description and the accompanying drawings.

The actuator device according to the invention, which is used in particular for height adjustment of a vehicle body, comprises a rotatable drive pinion which is connected at least indirectly to a rotatable output gear, wherein the output gear is rotatably connected to a sun gear, and wherein the drive pinion at least mit- is connected to a locking unit, wherein the locking unit comprises a rotatable locking arm which is intended to engage in the sun gear to lock the driven wheel against rotation. Under the term used in the description and claims of the "indirect" connection between the drive pinion and the driven gear and between the drive pinion and the locking unit is to be understood that the drive pinion is not directly, so directly connected to the output gear and the locking unit but about The respective connection between the drive pinion and the output gear as well as between the drive pinion and the lock unit is substantially intended to provide a torque and a rotational speed from the drive pinion to the output gear and The output gear is preferably connected at least indirectly to a rotatable component of a height adjustment device for a vehicle is arranged at the Aktuatorvomchtung either between the vehicle body and a suspension spring or between the suspension spring and a wheel. In the first case, the Aktuatorvomchtung invention can be arranged on the upper spring plate of the suspension spring. In the second case, the Aktuatorvomchtung invention can be arranged on the lower spring plate of the suspension spring. Preferably, the height adjustment device is formed by a screw drive, which has a threaded spindle arranged along a lifting axis, forming a first lifting part and a spindle nut forming a second lifting part. The screw drive is in particular formed by a ball screw whose balls roll on helically wound around the spindle axis ball grooves of the spindle nut and the threaded spindle. With such ball screw reliable adjustment movements of Aktuatorvomchtung can be performed. Alternatively, it is also conceivable that the Aktuatorvomchtung is part of a transmission with an internal locking device.

The output gear and the sun gear are non-rotatably connected to each other, so that a rotational movement of the output gear to an identical rotational movement of the sun Rades leads. Consequently, the sun gear and the output gear rotate at the same speed in the same direction. A blocking of the rotational movement on the sun gear is accompanied by a blocking of the rotational movement on the output gear. Preferably, the sun gear is arranged on the front side of the output gear and positively connected to the Abtrssrad. In particular, a contour on the sun gear engages in a complementarily formed contour on the driven wheel.

The locking unit comprises a rotatable locking arm, which is rotatable indirectly via the drive pinion. In particular, the drive pinion of a drive motor, preferably an electric motor in a first and a second rotational direction is operable, wherein the second direction of rotation is opposite to the first direction of rotation. Thus, rotational movement and torque are transmitted from the drive motor via the drive pinion to the lock arm to move the lock arm. Thus, the locking arm is rotatable in two directions of rotation in response to the drive motor.

Preferably, the locking arm comes in an operation of the drive pinion in the first direction of rotation on a peripheral surface of the sun gear to the plant to engage in the sun gear and thereby lock the output gear against rotational movement. In particular, the sun gear has on a peripheral surface a plurality of engagement portions for at least tangential receiving the locking arm. Preferably, the engagement portions are hook-shaped, to support the locking arm radially.

Further preferably, the locking arm is radially spaced from the sun gear in an operation of the drive pinion in the second direction of rotation and comes to a housing to the plant. In other words, a change of direction of the drive pinion causes the lock arm is rotated away from the sun gear. In order to prevent the locking arm from coming into contact again with the sun gear after one revolution, a housing or a stationary component is provided on which the locking arm can come to rest.

Preferably, the drive pinion is connected via a gear unit with the output gear. In particular, the gear unit has at least a first and a second gear, wherein the two gears rotatably on a common shaft stored and rotatably connected to each other. In particular, the two gears have different diameters and different numbers of teeth. In other words, the drive pinion meshes with the first gear and transmits torque and speed thereacross. From the first gear to the second gear is a translation, the torque increases and the speed decreases. The second gear meshes with the output gear to transfer the torque and speed from the second gear to the output gear. Preferably, the drive pinion is connected via a belt with the locking unit. A belt tension is adjusted such that the blocking arm experiences sufficient pressure against the sun gear, but no unnecessarily high friction torque is generated at the drive pinion. A spinning of the belt on the drive pinion or on the locking unit is not provided. Alternatively, it is also conceivable that the locking arm is driven by means of a lifting magnet or similar elements.

The invention includes the technical teaching that the locking unit comprises a sliding bush with a driver, wherein the sliding bush is non-rotatably connected to the belt, and wherein the blocking arm cooperates with the driver via a molding. The belt comes slip-free on an outer peripheral surface of the sliding bush to the plant. The slide bush and the lock arm form a delay unit, by which a rotation of the lock arm to the drive pinion is delayed. This mechanical delay preferably allows rotation of the lock arm after a ^three turn of the slide bushing. Thus, in a direction of rotation change of the drive pinion only the sliding sleeve is first rotated, only when the concern of the formation of the slide bushing on the driver of the locking arm, the torque and the rotational speed of the slide bushing are transmitted to the blocking arm.

An exemplary embodiment of the invention will be explained in more detail below with reference to the six drawings. This shows

FIG. 1 shows a schematic exploded view of an actuator device according to the invention, FIG. 2 shows a schematic perspective illustration of the actuator device according to FIG. 1 according to the invention,

FIG. 3 is a schematic sectional view of the actuator device according to the invention according to FIG. 2,

FIG. 4 a is a schematic plan view of the actuator device according to the invention shown only partially according to FIG. 2, with a blocking arm in a first position,

FIG. 4b shows a schematic top view of the actuator device according to the invention shown in FIG. 2, with the blocking arm in a second position, and FIG. 5 a schematic detail of the blocking arm in the first position according to FIG. 4a.

According to FIG. 1, an actuator device according to the invention comprises a rotatable drive pinion 1, which is connected via a drive motor 6-shown here only in a very simplified manner. The drive pinion 1 has a toothing, which is in meshing engagement with a toothing on a first gear 9a of a gear unit 8. The first gear 9a is connected to a second gear 9b of the gear unit 8. The two gears 9a, 9b are rotatably mounted on a common shaft 10 and connected to each other. Between the first gear 9a and the common shaft 10, two slide bushes 15a, 15b are arranged. The second gear 9b has a toothing, which is in meshing engagement with a toothing on a driven gear 2, wherein the driven gear 2 is rotatably connected to a sun gear 3. The sun gear 3 is arranged frontally on the output gear 2 and positively connected to the output gear 2. Furthermore, the sun gear 3 has a plurality of engagement sections 17 on a circumferential surface.

Furthermore, the actuator device according to the invention also comprises a blocking unit 4, wherein the blocking unit 4 has a rotatable blocking arm 5. The locking arm 5 is intended to engage in the sun gear 3 to the driven wheel 2 against to lock a rotary movement. For this purpose, the blocking arm 5 blocked by an at least tangential engagement in one of the many engagement portions 17 of the sun gear 3, the rotation of the sun gear 3 and thus also the rotation of the driven gear 2. The locking unit 4 further comprises a sliding bush 12 with a driver 13, wherein the slide bushing 12 rotatably connected to a belt 1 1 is connected. Thus, the belt 1 1 connects the output pinion 1 with the locking unit 4, in particular with the sliding bushing 12. The blocking arm 5 is rotatably connected via a molding 14 with the driver 13. Further, the locking arm 5 is rotatably mounted on a shaft 16, wherein the sliding bush is rotatably mounted on the locking arm 5. As a result, a slip clutch is realized.

According to Figure 2, the drive pinion 1 is driven by the drive motor 6, wherein a torque and a speed are transmitted. The drive pinion 1 drives via the gear unit 8, the driven gear 2, whereby a raising or lowering of a vehicle level, for example by means of - not shown here - screw drive is realized. Further, the drive pinion 1 simultaneously drives via the belt 1 1, the locking unit 4, in particular the slide bushing 12 and the driver 13 and the cooperating molding 14 to the locking arm 5, so that the locking arm 5 in the engaging portion 17 hacks the sun gear 3.

3 shows in particular that the second gearwheel 9b is arranged radially and axially on the first gearwheel 9a. FIG. The first gear 9a is rotatably supported by the two sliding bushes 15a, 15b on the shaft 10 designed as a hollow shaft. The second gear 9b is in meshing engagement with the output gear 2.

According to FIGS. 4 a and 4 b, the drive pinion 1 can be operated by the drive motor 6 in a first and a second rotational direction A, B. For reasons of simplification, FIGS. 4a and 4b deliberately omitted the illustration of the output gear 2 and the gear unit 8 and of the drive motor 6.

In Figure 4a, the drive pinion 1 is operated in the first direction of rotation A, wherein the locking arm 5 comes to a peripheral surface of the sun gear 3 to the plant. In other words, the drive sprocket 1 is rotated counterclockwise, the locking arm 5 is pressed against the sun gear 3. After an abutment of the locking arm 5 on the sun gear 3, the sliding bush 12 slips through. The sun gear 3 also rotates counterclockwise. If the drive pinion 1 - as shown in Figure 4b -, however, rotates in the second direction B, namely clockwise, the locking arm 5 is pivoted away from the sun gear 3 until the locking arm 5 abuts against a housing 7. After a striking of the locking arm 5 on the housing 7, the sliding bush 12 slips through. In this way, it is possible to rotate the sun gear 3 and thus also the output gear 2 clockwise without the blocking arm 5 engaging in the engagement portions 17 of the sun gear 3 and thereby blocking the output gear 2 against clockwise rotation.

FIG. 5 shows a blocking process of the actuator device according to the invention. The circles filled with black represent a movement of the blocking arm 5 on the circumference of the driven gear 2 during a rotational movement of the drive pinion 1, and thus also of the sun gear 3 counterclockwise. In contrast, the open circles constitute a movement of the blocking arm 5 on the circumference of the driven gear 2 during a rotational movement of the drive pinion 1 and thus also of the sun gear 3 in a clockwise direction.

First, the drive motor 6 drives the output gear 2 and thus also the sun gear 3 counterclockwise, at the same time the locking arm 5 is pressed against the sun gear 3. As soon as the direction of rotation of the drive motor 6 is reversed, the drive motor 6 drives the output gear 2 and thus also the sun gear 3 in a clockwise direction, wherein the blocking arm 5 is pivoted away from the sun gear 3 with a time delay. This delay is realized by the driver 13 on the sliding bush 12 and the molding 14 on the blocking arm 5. Due to the delay in the reversal of rotation of the drive pinion 1 on the one hand, the engagement of the locking arm 5 is realized on the hook-shaped engagement portion 17 of the sun gear 3 and on the other equally releasing the locking arm 5 from the hook-shaped engagement portion 17 of the sun gear 3. A non-delayed locking arm 5 can indeed from the locked position on the hook-shaped Disconnect engaging portion 17, but then no longer comes into the locked position on the hook-shaped engagement portion 17 to the plant.

LIST OF REFERENCE NUMBERS

1 drive pinion

2 output gear

3 sun wheel

4 blocking unit

5 blocking arm

6 drive motor

7 housing

8 gear unit

9a, 9b gear

10 wave

1 1 belt

12 sliding bush

13 drivers

14 formation

15a, 15b sliding bush

16 wave

17 engaging section

A first direction of rotation

B second direction of rotation

Claims

claims

1 . Actuator device for height adjustment of a vehicle body, comprising a rotatable drive pinion (1) which is at least indirectly connected to a rotatable drive wheel (2), wherein the output gear (2) is non-rotatably connected to a sun gear (3), and wherein the drive pinion ( 1) is at least indirectly connected to a locking unit (4), wherein the locking unit (4) has a rotatable locking arm (5) which is intended to engage in the sun gear (3) to the driven wheel (2) against a rotational movement lock.

2. Actuator device according to claim 1,

characterized in that the drive pinion (1) by a drive motor (6) in a first and a second rotational direction (A, B) is operable.

3. Actuator device according to claim 2,

characterized in that the locking arm (5) comes in an operation of the drive pinion (1) in the first rotational direction (A) on a peripheral surface of the sun gear (3) to the plant.

4. Actuator device according to claim 2,

characterized in that the locking arm (5) during operation of the drive pinion (1) in the second rotational direction (B) radially from the sun gear (3) is spaced and on a housing (7) comes to rest.

5. Actuator device according to one of the preceding claims,

characterized in that the drive pinion (1) via a gear unit (8) with the output gear (2) is connected.

6. Actuator device according to claim 5,

characterized in that the gear unit (8) at least a first and a second gear (9a, 9b), wherein the two gears (9a, 9b) rotatably mounted on a common shaft (10) and rotatably connected to each other.

7. Actuator device according to one of the preceding claims,

characterized in that the drive pinion (1) via a belt (1 1) with the locking unit (4) is connected.

8. Actuator device according to one of the preceding claims,

characterized in that the locking unit (4) has a sliding bushing (12) with a driver (13), wherein the sliding bush (12) is non-rotatably connected to the belt (1 1), and wherein the blocking arm (5) has a shape ( 14) interacts with the driver (13).

9. Actuator device according to one of the preceding claims,

characterized in that the sun gear (3) is arranged on the front side of the output gear (2) and positively connected to the output gear (2).

10. Actuator device according to one of the preceding claims,

characterized in that the sun gear (3) on a circumferential surface a plurality of engaging portions (17) for at least tangential receiving the locking arm (5).