阅读说明：本技术 机电执行器 (Electromechanical actuator ) 是由 克尔斯廷·杜尔斯特 曼努埃尔·施密特 于 2018-10-16 设计创作，主要内容包括：本发明涉及一种用于车辆的机电执行器(2)、尤其底盘执行器、例如侧倾稳定器的执行器,机电执行器包括基于逆磁致伸缩原理的转矩测量装置(13),转矩测量装置具有至少一个电子单元,其中,电子单元具有借助铆接连接部(20)至少间接地与执行器壳体(9)连接的电路板(14)。(The invention relates to an electromechanical actuator (2) for a vehicle, in particular a chassis actuator, for example an actuator of a roll stabilizer, comprising a torque measuring device (13) based on the inverse magnetostrictive principle, having at least one electronic unit, wherein the electronic unit has a circuit board (14) which is connected at least indirectly to an actuator housing (9) by means of a rivet connection (20).)

1. Electromechanical actuator (2) for a motor vehicle, comprising a torque measuring device (13) based on the inverse magnetostrictive principle, comprising at least one electronic unit, characterized in that the electronic unit comprises a circuit board (14) which is connected at least indirectly to an actuator housing (9) by means of a rivet connection (20).

2. Actuator (2) according to claim 1, characterized in that the rivet connection (20) comprises a plurality of rivets (16, 17) by means of which the circuit board (14) is fixed on a planar carrier element (15) connected to the actuator housing (9).

3. Actuator (2) according to claim 2, characterized in that a gap (Sp) is formed between the circuit board (14) and the carrier element (15).

4. Actuator (2) according to claim 3, characterized in that the carrier element (15) is made of plastic.

5. Actuator (2) according to claim 3, characterized in that the carrier element (15) is made of metal.

6. Actuator (2) according to one of claims 1 to 5, characterized in that the surface normal of the circuit board (14) is perpendicular to the longitudinal axis of the actuator housing (9).

7. Actuator (2) according to any of claims 1 to 6, characterized in that the actuator is configured as a chassis actuator.

8. An actuator (2) according to claim 7, characterized in that the actuator is configured as a component of a roll stabilizer.

9. Actuator (2) according to claim 8, characterized in that the circuit board (14) is arranged at least for the most part in a housing region (11) of the actuator housing (9) which is tapered compared to a central housing region (12).

Technical Field

The invention relates to an electromechanical actuator suitable for use in a motor vehicle according to the preamble of claim 1.

Background

Such an actuator is known, for example, from DE 102014221129 a 1. The known actuator is part of an active roll stabilizer and has an electronic unit which comprises different sections. The first section of the electronics unit is a rotatable part and the second section is a non-rotatable part.

An active roll stabilizer with electronics components rotating together is also known from DE 102014222708 a 1. In this case, the sensor for measuring the torque is arranged on a planet carrier wall of the planetary gear. The electronic device is a printed circuit board with a magnetic field sensor disposed thereon.

Another roll stabilizer for measuring torque with the inverse magnetostrictive effect is known from DE 102013219761B 3. In this case, the transverse forces with respect to the longitudinal axis of the stabilizer are also taken into account in addition to the torque.

Furthermore, different designs of electromechanical roll stabilizers for motor vehicles are described in DE 102015222068 a1 and DE 102015209310 a 1.

A circuit arrangement for operating a magnetoelastic sensor is described in DE 3620412 a 1. The circuit arrangement should be designed to suppress as much as possible the relationship of the sensor signal with respect to the distance between the sensor coil and the measuring object.

A force measuring device for measuring forces in a solid-state actuator is known from EP 2013598B 1. The force measurement device includes a piezoresistive amorphous carbon layer.

Disclosure of Invention

The object of the present invention is to improve an electromechanical actuator, in particular an actuator of an active roll stabilizer, for a motor vehicle, in particular with respect to manufacturing technology and from the standpoint of the use of installation space, in comparison to the prior art described.

According to the invention, this object is achieved by an actuator, for example a chassis actuator, in particular an actuator of a roll stabilizer, having the features of claim 1. The actuator comprises in a known basic embodiment a torque measuring device based on the inverse magnetostrictive principle, which has at least one electronic unit. According to the invention, the electronic unit has a circuit board which is connected at least indirectly to the actuator housing of the actuator by means of a rivet connection. The circuit board is a printed circuit board equipped with electronic components of the electronic unit. The circuit board is a non-rotatable component of the actuator.

The rivet connection can in principle be made of an element which is an integral component of the carrier element or of a separate element, i.e. a rivet. In the latter case, the carrier element is preferably a planar element which is arranged fixedly in the actuator housing and is connected to the circuit board by means of a plurality of rivets. It is also possible for the carrier element to be constructed as an integral component of the actuator housing. In this case, the carrier element is a metal component. In other cases, the carrier element may be made of metal or of plastic.

Regardless of the material from which the carrier element is made or the material combination from which the carrier element is composed, in a preferred embodiment a gap is formed between the circuit board and the carrier element. This gap is advantageous for cooling of the circuit board. In addition, the play improves the solution to be able to withstand deformations which may occur during operation of the actuator, in particular in roll stabilizers or other chassis actuators, for example as a result of mechanical loads and/or temperature effects.

The circuit board is preferably accommodated in the actuator housing in such a way that the surface normal of the circuit board is perpendicular to the longitudinal axis of the actuator. This means that the center axis of the actuator housing, which has a cylindrical basic shape, is spaced parallel to the circuit board.

The actuator is particularly suitable as a chassis actuator, for example in a rear axle steering or in a level control, in particular a level control. In a particularly preferred embodiment, the actuator can be an actuator for an active roll stabilizer of a motor vehicle.

In the case of an actuator in the form of a roll stabilizer actuator, the circuit board is arranged in a space-saving manner in a housing region of the actuator housing which is thinner than the central housing region. In this way, virtually the entire diameter of the central, non-tapering housing region is available for the force-generating and force-transmitting components of the roll stabilizer.

In the electromechanical actuator, for example, a brushless DC motor (B L DC motor) is used as the motor, and as the speed reducer in the actuator, for example, a multistage planetary gear transmission mechanism or a shaft transmission mechanism can be used.

Drawings

Embodiments of the present invention are explained in detail below with reference to the drawings. In which is shown:

figure 1 shows a top view of the electromechanical roll stabilizer,

figure 2 shows a partial cross-sectional view of the actuator of the roll stabilizer,

fig. 3 shows a detailed view of the device according to fig. 2.

Detailed Description

A roll stabilizer, generally designated by reference numeral 1, is intended for use as a chassis actuator in a motor vehicle. Reference is made to the prior art cited at the outset for the principal function of the roll stabilizer 1.

The roll stabilizer 1 includes an electromechanical actuator 2. The actuator 2 has a cylindrical basic shape, wherein the axis is substantially transverse to the longitudinal axis of the vehicle. Two stabilizer halves 3, 4 in the form of torsion bar springs are connected to the actuator 2, and are coupled to a vehicle body, not shown, by means of bearings 5, 6. The term "stabilizer halves" does not imply that the two stabilizer halves 3, 4 must be designed to be of the same size. However, an eccentric arrangement of the actuator 2 in the chassis is also possible. At the ends of the stabilizer halves 3, 4 facing away from the actuator 2, connecting elements 7, 8 are formed for the articulated connection to a wheel carrier of a motor vehicle.

The actuator housing, indicated at 9, of the electromechanical actuator 2 has a flange 10 on its left side in fig. 1, which is connected to the stabilizer half 3. A substantially cylindrical central housing region 12 of the actuator housing 9 is connected to the flange 10. On the right side of the central housing region 12, which is arranged according to fig. 1, a likewise cylindrical, tapering housing region 11 is connected to it. The stabilizer half 4 is introduced into the actuator housing 9 through the thinned housing region 11.

A torque measuring device 13 is located in the thinned housing region 11, which provides information about the torque acting on the interior of the actuator 2 on the basis of the inverse magnetostrictive principle.

The torque measuring device 13 comprises a circuit board 14 on which electronic components, not shown, are arranged, thereby forming an electronic unit. The circuit board 14 is fixed to the carrier element 15 by means of rivets 16, 17. A gap Sp is formed between the carrier element 15 and the circuit board 14 so that a large part of the circuit board 14 is lifted from the carrier element 15. In other cases, that is to say in the region around the rivets 16, 17, support regions 18, 19 are provided in which the circuit board contacts the carrier element 15.

The planar carrier element 15 is arranged fixedly in the thinned housing region 11 within the inner space of the actuator 2, indicated by IR. As can be seen from fig. 3, the rivet connection, indicated overall by 20, created by the rivets 16, 17 is very space-saving, in particular in a direction perpendicular to the planar elements 14, 15, i.e. in the radial direction of the actuator housing 9. The central axis of the actuator 2, which axis coincides with the pivot axis of the stabilizer halves 3, 4, is spaced parallel to the circuit board 14 and the carrier element 15. The circuit board 14 projects only partially into the central housing region 12. The electromechanical components of the actuator 2, which are not shown, namely the electric motor and the gear unit, are located in the housing region 12.

List of reference numerals

1-roll stabilizer

2 actuator

3 stabilizer half

4 stabilizer halves

5 bearing

6 bearing

7 connecting piece

8 connecting piece

9 actuator casing

10 Flange

11 tapering housing region

12 middle shell area

13 Torque measuring device

14 circuit board

15 carrier element

16 rivet

17 rivet

18 bearing area

19 bearing area

20 riveted joint

IR inner space

Sp gap