Actuator setup

Abstract

Actuator device, in particular for actuating a clutch, with an electrically controllable fluid source (3), wherein the actuator device (1;62;73) comprises an externally arranged stator (10) which is sealed without leakage on at least one side, characterized in that a substantially pot-shaped rotor (20) is rotatably arranged in the stator (10) and is equipped with internal teeth, wherein the electrically controllable fluid source is integrated into the rotor.

Description

[0001] The invention relates to an actuator device, in particular for actuating a clutch, with an electrically controllable fluid source.

[0002] German utility model DE 299 13 367 U1 discloses an internal gear pump with at least one internally toothed ring gear and a meshing externally toothed impeller, and with an electric drive, wherein the ring gear forms the interior of a rotor of a brushless electric motor. European patent EP 2 386 774 B1 discloses a method for controlling a friction clutch, wherein the friction clutch is subjected to a clutch pressure generated by a hydraulic actuator arrangement comprising an electrically controllable fluid source and a hydraulic actuator, the electrically controllable fluid source being a pump controlled by an electric motor, the fluid source control variable being the motor current.

[0003] Further hydraulic actuator devices with a fluid source are known from publications DE 42 09 792 A1, DE 40 37 089 A1, US 7 131 409 B2 and DE 10 2014 214 215 A1.

[0004] The object of the invention is to create an actuator device, in particular for actuating a clutch, with an electrically controllable fluid source, which is simple in design and / or inexpensive to manufacture.

[0005] The problem is solved in an actuator device, particularly for actuating a clutch, with an electrically controlled fluid source, by the actuator device comprising an externally arranged stator that is leak-free sealed on at least one side, wherein a substantially cup-shaped rotor is rotatably arranged in the stator and equipped with internal teeth, and wherein the electrically controlled fluid source is integrated into the rotor. The rotor is advantageously designed as a rotor cup with a cup base and a cup shell. The internal teeth of the rotor are advantageously attached to the cup shell. The cup base of the rotor is advantageously oriented towards the motor partition. The electrically controlled fluid source is preferably an electrically controlled hydraulic source, in particular an electrically controlled hydraulic pump.The hydraulic pump is preferably designed as a gear pump, in particular as an internal gear pump with or without a crescent shape. The external stator is, for example, open on one side and leak-proof sealed on the other. Connecting wires can extend through the leak-proof seal of the stator. Furthermore, a sensor magnetic field can advantageously penetrate the leak-proof seal of the stator.

[0006] A preferred embodiment of the actuator is characterized in that the stator is sealed leak-free on at least one side by a motor partition. The leak-free seal of the stator prevents unwanted escape of fluid, particularly hydraulic fluid, during operation of the electrically controlled fluid source. This offers the advantage that the electrically controlled fluid source can be easily integrated into the rotor. The motor partition is preferably a housing component of a multi-part housing for the actuator.

[0007] Another preferred embodiment of the actuator is characterized in that the rotor has a rotor shaft stub by which the rotor is mounted to the motor partition. The rotor shaft stub advantageously extends from the base of the housing and can be formed integrally with the rotor.

[0008] Another preferred embodiment of the actuator is characterized in that the rotor shaft stub has a magnet of a sensor device. The rotational speed of the rotor can be easily detected using the sensor device.

[0009] Another preferred embodiment of the actuator is characterized in that an electronic control unit is arranged on the side of the motor partition facing away from the stator. This ensures in a simple manner that the electronic control unit does not come into contact with fluid, in particular hydraulic fluid.

[0010] Another preferred embodiment of the actuator is characterized in that the rotor is sealed leak-free by a pump partition wall, which has at least one, several, or each of the following features: an eccentric pump journal; a pump impeller, in particular with external teeth; a rotor bearing body; a pressure port; and a suction port. The eccentric pump journal advantageously serves to rotatably support the pump impeller, in particular with external teeth. The externally toothed pump impeller interacts with the internal teeth of the rotor in a known manner, forming an internal gear pump. The rotor bearing body advantageously serves to rotatably support the rotor on the side facing away from the rotor shaft stub. In the assembled state of the actuator, the rotor bearing body is advantageously arranged within the cup-shaped rotor.The pressure port on the pump partition wall serves, for example, to connect a pressure line. Similarly, the suction port on the pump partition wall is advantageously used to connect a suction line. The pump partition wall is preferably a housing component of a multi-part housing for the actuator unit.

[0011] Another preferred embodiment of the actuator is characterized in that the motor partition and / or the pump partition is combined with a housing body to form a fluid reservoir. The housing body, for example, essentially has the shape of a circular cylinder shell arranged between the motor partition and the pump partition. Advantageously, the housing body is fluid-tightly connected to both the motor partition and the pump partition.

[0012] Another preferred embodiment of the actuator is characterized in that the housing body radially surrounds the stator on the outside, forming a receiving space that constitutes the fluid reservoir. Advantageously, this receiving space is designed as an annular space, bounded radially inwards by the stator and radially outwards by the housing body. In the axial direction, the receiving space is bounded by the pump partition and the motor partition.

[0013] Another preferred embodiment of the actuator is characterized in that the housing body has at least one vent opening. The vent opening is advantageously located at the top when the actuator is installed.

[0014] The actuator device according to the invention is preferably a pressure control actuator with an integrated fluid source. The fluid source is advantageously a pump with which a fluid, in particular hydraulic fluid, is drawn in. The hydraulic fluid, in particular oil, is drawn in, for example, from the bottom of a motor vehicle transmission. The drawn-in hydraulic fluid is supplied to a consumer via the pressure port or, optionally, a pressure line. For this purpose, a spray device can advantageously be fitted at the end of the pressure line. The fluid provided by the fluid source, in particular hydraulic fluid, serves alternatively or additionally advantageously for lubricating and / or cooling transmission components.

[0015] According to a further embodiment, the actuator device according to the invention is equipped with a pressure sensor whose actual pressure is adjusted to a target pressure signal via a control loop. Advantageously, the control loop includes a differentiator applied to the pressure signal. The control loop advantageously generates a feedforward control signal from the target pressure signal, which acts directly as a current or pulse wave modulation ratio.

[0016] Further advantages, features, and details of the invention will become apparent from the following description, in which various exemplary embodiments are described in detail with reference to the drawing. The drawing shows: Fig. 1 a simplified, perspective exploded view of an actuator device according to the invention; Fig. 2 a perspective view of a pump partition wall with a pump impeller and a rotor bearing body of the actuator assembly made of Fig. 1; Fig. 3 a perspective view of a rotor of the actuator assembly Fig. 1; Fig. 4 a perspective view of a similar actuator setup as in Fig. 1 with a pressure connection and a vent connection and Fig. 5 a similar actuator device as in Fig. 4 with a connected suction line and a connected pressure line.

[0017] In the Fig. 1, Fig. 4 and Fig. Figure 5 shows an actuator assembly 1; 62; 73 in perspective. Actuator assembly 1 is an electric actuator for clutches and / or circuits. The electric actuator is used particularly in the powertrains of passenger cars with few elements to be switched, for example in electric vehicles or hybrid vehicles. A fluid source 3 in the form of an internal gear pump is integrated into actuator assembly 1; 62; 73.

[0018] The actuator assembly 1; 62; 73 comprises a stator 10 with circularly arranged tooth elements, of which in Fig. Figure 1 shows three tooth elements 11, 12 and 13. The stator 10 with the tooth elements 11 to 13 is arranged outside a rotor 20. The rotor 20 comprises magnetic elements, of which in Fig. Figure 1 shows three magnetic elements 21, 22 and 23. The stator 10 and the rotor 20 serve in a known manner to represent an electromotive drive device for the fluid source 3, whereby the associated windings are not shown.

[0019] According to one aspect of the invention, the rotor 20 is designed as a rotor pot 25. The rotor pot 25 comprises a pot shell 26 with internal teeth (not shown). The pot shell 26 with the internal teeth serves as a ring gear for the fluid source 3. Thus, the rotor 20 performs a dual function. A rotor shaft stub 28 extends from a pot base 27 of the rotor pot 25. A magnet 29 is attached to a free end of the rotor shaft stub 28, which interacts with a sensor device (not shown) to detect the rotational speed of the rotor 20 during operation of the actuator device 1.

[0020] The rotor shaft stub 28 of the rotor 20 also serves to rotatably mount the rotor 20 on one side against a motor partition 30. Fig. Figure 1 shows that the stator 10 is leak-free sealed on one side by the motor partition 30. Connecting wires can extend from the stator 10 through the motor partition 30. A sensor magnetic field can also penetrate the motor partition 30. An electronic control unit (not shown) for the actuator 1 is located directly behind the motor partition 30, that is, on the side of the motor partition 30 facing away from the rotor 20 and the stator 10.

[0021] The cup-shaped design of the rotor 20 offers the advantage that stationary parts of the fluid source 3 can be arranged centrally within the rotor 20. For this purpose, a cavity in the interior of the rotor 20 is advantageously sealed fluid-tight by a pump partition 40. The pump partition 40 is arranged parallel to the motor partition 30. The stator 10 and the rotor 20 are arranged axially between the motor partition 30 and the pump partition 40. The term "axial" refers to an axis of rotation of the rotor 20. "Axial" means parallel to or in the direction of the axis of rotation of the rotor 20.

[0022] In Fig. Figure 2 shows the pump partition 40 with a pump impeller 41 in perspective. The pump impeller 41 is provided with external teeth (not shown) which mesh with, or are engaged in engagement with, the internal teeth of the rotor 20 during operation of the actuator assembly 1; 62; 73. The pump impeller 41 is rotatably mounted on an eccentrically arranged pump journal, which is attached to the pump partition 40. A rotor bearing body 45 is attached to the free end of the pump journal and serves to support the rotor 20 on the side of the rotor 20 facing away from the rotor shaft stub 28. In the assembled state of the actuator assembly 1, the rotor bearing body 45 and the pump impeller 41 with its external teeth are located inside the rotor 20. In this configuration, the external teeth of the pump impeller 41 engage with the internal teeth of the rotor 20.

[0023] In Fig. Figure 3 shows the rotor 20 with the rotor shaft stub 28 and the magnet 29 in perspective view. In the assembled state of the actuator assembly 1, the rotor 20 with the rotor shaft stub 28 is rotatably mounted on the motor partition 30.

[0024] In the Fig. 1 and Fig. Figure 4 shows that the pump partition 40 has a pressure connection 51. The in Fig. The actuator assembly 62 shown in Figure 4 further comprises a housing body 60. The housing body 60 essentially has the shape of a circular cylindrical shell that encloses the stator (10 in Fig. 1) surrounds.

[0025] At connection points 61, the housing body 60 is fluid-tightly connected to the pump partition 40 and the motor partition 30. This allows for the simple representation of a fluid reservoir in an annular space between the stator 10 and the housing body 60.

[0026] For ventilation, the housing body 60 is equipped with a ventilation port or a ventilation opening 63. The ventilation device or the ventilation port 63 is advantageously arranged at the top, relative to the force of gravity.

[0027] The in Fig. The actuator assembly 73 shown in Figure 5 includes a suction port 52 in addition to the pressure port 51. A suction line 72 is connected to the suction port 52. A pressure line 71 is connected to the pressure port 51. A spray device 75 with at least one spray opening is attached to the free end of the pressure line 71. Arrows 77 and 78 indicate hydraulic fluid exiting or being sprayed out of the pressure line 71. Reference symbol list 1 actuator device 3 Fluid source 10 Stator 11 Tooth element 12 tooth element 13 Tooth element 20 Rotor 21 magnetic element 22 magnetic element 23 Magnetic element 25 Rotor pot 26 potholders 27 pot base 28 rotor shaft stubs 29 Magnet 30 Engine partition 40 Pump partition 41 Pump wheel 45 Rotor bearing bodies 51 Pressure connection 52 Suction port 60 Housing bodies 61 connection points 62 Actuator setup 63 Vent opening 71 Pressure line 72 Suction line 73 Actuator setup 75 Spraying device 77 Arrow 78 Arrow

Claims

[1] Actuator device, in particular for actuating a clutch, with an electrically controllable fluid source (3), wherein the actuator device (1;62;73) comprises an externally arranged stator (10) which is sealed without leakage on at least one side, characterized by , that a substantially pot-shaped rotor (20) is rotatably arranged in the stator (10) and is equipped with internal teeth, wherein the electrically controllable fluid source is integrated into the rotor. [2] Actuator device according to claim 1, characterized by , that the stator (10) is sealed leak-free on at least one side by a motor partition (30). [3] Actuator device according to claims 1 and 2, characterized by , that the rotor (20) has a rotor shaft stub (28) with which the rotor (20) is mounted on the motor partition (30). [4] Actuator device according to claim 3, characterized by, that the rotor shaft stub (28) has a magnet (29) of a sensor device. [5] Actuator device according to one of claims 2 to 4, characterized by , that an electronic control is arranged on the side of the motor partition (30) facing away from the stator (10). [6] Actuator device according to any one of the preceding claims, characterized by , that the rotor (20) is sealed without leakage by a pump partition (40) which has at least one, several or each of the following features: a) an eccentric pump pin; b) a pump impeller (41), in particular an externally toothed impeller; c) a rotor bearing body (45); d) a pressure port (51); e) a suction connection. [7] Actuator device according to one of claims 2 to 6, characterized by , that the motor partition (30) and / or the pump partition (40) is combined with a housing body (60) to form a fluid reservoir. [8] Actuator device according to claim 7, characterized by , that the housing body (60) surrounds the stator (10) radially on the outside in such a way that a receiving space is formed which represents the fluid reservoir. [9] Actuator device according to claim 8, characterized by that the housing body (60) has at least one vent opening (63).

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