DE102018124220A1 - Electric pump actuator and coupling, as well as procedures for mounting a pump actuator - Google Patents

Abstract

The electric pump actuator (1) according to the invention, in particular for actuating a clutch (41), in particular in the drive train of a motor vehicle, comprising a pump (2) and an electric motor (3), is characterized in that the pump (2) and the electric motor (3) are formed in a one-piece housing (4), which on at least one end face (22, 23) has a closable mounting opening (20, 25, 26)

Description

The present invention relates to an electric pump actuator in which a pump is operated via an electric motor, by which a hydraulic pressure is built up, in particular for actuating a clutch. Electric pump actuators may be designed and arranged to operate clutches, transmission actuators in a clutch transmission or other transmission, such as a CVT (Continuously Variable Transmission) or a hybrid transmission. Furthermore, a corresponding coupling is the subject of this invention, as well as a method for assembling an electric pump actuator.

Electric pump actuators are known for the actuation of clutches, for example from the WO 2012/113368 A2 , An electric motor drives an integrated hydraulic pump which provides a pressure that is used to actuate the clutch, ie to engage or disengage corresponding friction partners. In an assumed as known electric pump actuator each pump and electric motor are constructed in separate housings, there are possibly more housing such as a valve housing or a mechanical housing to do so. This means a considerable effort, since each of these housing requires its own tool for production and the assembly with sealing of the corresponding housing is relatively complicated.

On this basis, the present invention has the object, at least partially overcome the problems known from the prior art and in particular to propose an electric pump actuator and a corresponding manufacturing method, in which a simple construction of the electric pump actuator is possible.

This object is achieved with the features of the independent claims. Further advantageous embodiments of the invention are specified in the dependent formulated claims. The individually listed in the dependent formulated features can be combined in a technologically meaningful way and can define further embodiments of the invention. In addition, the features specified in the claims are specified and explained in more detail in the description, wherein further preferred embodiments of the invention are shown.

The electric pump actuator according to the present invention, in particular for actuating a clutch, in particular in the drive train of a motor vehicle comprising a pump and an electric motor, is characterized in that the pump and the electric motor are formed in a one-piece housing which on at least one end face has a closable mounting opening.

According to the present invention, therefore, a common, one-piece housing for at least pump and electric motor is proposed. This greatly facilitates the assembly of the electric pump actuator (EPA). In this case, the pump and the electric motor are preferably arranged one behind the other in an axial direction. This facilitates the production of the operative connection of pump and electric motor.

The electric pump actuator can be designed and set up in particular for use in a clutch transmission for a motor vehicle. The electric pump actuator may be designed and arranged to operate clutches, transmission actuators in a clutch transmission or other transmission, such as a CVT (Continuously Variable Transmission) or a hybrid transmission. In this case, the electric pump actuator can be used in particular for pumping a working fluid with a pump, in particular for actuating a working cylinder for actuating the clutch, ie for engagement and / or disengagement of the clutch. The electric pump actuator preferably comprises at least one stator and one rotor. Stator and rotor are rotatable relative to each other. The stator is preferably held firmly, for example on a wall of a clutch gear. Stator and rotor are preferably formed with magnetic materials and / or provided with electrical coils, that the rotor can be rotated driven in the manner of an electric motor against the stator. The electric pump actuator may also be referred to as an electric motor.

According to an advantageous embodiment, at least one valve is integrated in the housing.

The valve is used in particular for controlling the flow of hydraulic fluid from the pump to the consumer, for example a slave cylinder of the clutch. The integration of the valve in the housing further simplifies the structure of the EPA. The valve may be an active valve, which can be actuated by a corresponding actuator.

According to an advantageous embodiment, at least one reservoir connection for supplying a medium to the pump is integrated in the housing.

This further reduces the complexity of setting up the EPA, since in particular the reservoir connection is designed so that the reservoir can be connected directly to the reservoir connection. Thus, the structure of the EPO can be further simplified.

According to an advantageous embodiment, the pump comprises a driving gear and a driven gear and the electric motor comprises a stator and a rotatable relative to the stator rotor, wherein the driving gear from the rotor and the driven gear is driven by the driving gear.

The construction as a gear pump with driving gear and driven gear, a pump can be realized, which ensures a uniform delivery of the hydraulic fluid and in which the coupling between the electric motor and the pump is easy to implement.

According to an advantageous embodiment, only one end face has a closable mounting opening.

The mounting opening is understood to mean an opening through which the assembly of the parts of the EPA which are present in the housing is carried out. In particular, it is an opening that is large enough that the parts to be assembled, so for example pump parts, can be introduced through the mounting hole in the housing. The housing may comprise further openings which serve, for example, for the passage of conduits or themselves as conduits or parts thereof.

The formation of an EPA with a single mounting hole allows the construction of an EPA, in which the effort required to seal the housing is reduced.

According to an advantageous embodiment, two end-side closable mounting openings are formed on opposite end sides of the housing.

This allows two-sided access and thus a simplified assembly of the EPO.

According to an advantageous embodiment, each mounting opening is closed by a cover, in particular sealing means between the cover and the housing and / or on the cover and / or housing may be formed in order to achieve a tight closure of the cover and housing.

Furthermore, clutch is proposed for a drive train of a motor vehicle, comprising at least one electric pump actuator according to the present invention for actuating the clutch. Furthermore, a motor vehicle is described which has such a clutch in the drive train.

1. a. Ausbilden des Gehäuses,
2. b. Einbringen von Pumpenteilen zur Bildung einer Pumpe in das Gehäuse und Montage der Pumpe;
3. c. Verschließen der Pumpe mit einem Pumpendeckel;
4. d. Montage eines Elektromotors im Gehäuse auf einer der Pumpe gegenüberliegenden Seite des Pumpendeckels;
5. e. Verschließen der Montageöffnung durch einen Abschlussdeckel,

wobei die Schritte b bis d durch die Montageöffnung durchgeführt werden.Furthermore, a method for mounting an electric pump actuator in a one-piece housing, which has a closable mounting opening on only one end side, is proposed, comprising the following steps:

1. a. Forming the housing,
2. b. Inserting pump parts to form a pump in the housing and mounting the pump;
3. c. Closing the pump with a pump cover;
4. d. Mounting an electric motor in the housing on a side of the pump cover opposite the pump;
5. e. Closing the mounting opening by a cover,

wherein the steps b to d are performed through the mounting hole.

Here, the electric motor in step d mounted electric motor is preferably pre-assembled.

• f. Ausbilden des Gehäuses,
• g. Einbringen von Pumpenteilen zur Bildung einer Pumpe in das Gehäuse und Montage der Pumpe;
• h. Verschließen der Pumpe mit einem Pumpendeckel;
• i. Montage eines Stators im Gehäuse auf einer der Pumpe gegenüberliegenden Seite des Pumpendeckels;
• j. Montage eines Rotors mit Lager und Welle im Gehäuse innerhalb des Stators, so dass die Welle mit einem Antriebsanschluss der Pumpe verbunden ist, und
• k. Verschließen der Montageöffnung durch einen Abschlussdeckel,

wobei die Schritte b bis e durch die Montageöffnung durchgeführt werden.Alternatively, the electric motor of stator and rotor can be built around housing itself. Then, a method for mounting an electric pump actuator in a one-piece housing, which has a closable mounting opening on only one end face, is preferred, comprising the following steps:

• f. Forming the housing,
• G. Inserting pump parts to form a pump in the housing and mounting the pump;
• H. Closing the pump with a pump cover;
• i. Mounting a stator in the housing on a side of the pump cover opposite the pump;
• j. Mounting a rotor with bearing and shaft in the housing inside the stator, so that the shaft is connected to a drive port of the pump, and
• k. Closing the mounting opening by a cover,

wherein the steps b to e are performed through the mounting hole.

In each case, preference is given to a process control in which a control unit is mounted in the housing immediately before closing the mounting opening.

As a precaution, it should be noted that the number words used here ("first", "second", ...) are given priority serve (only) to distinguish a plurality of similar objects, sizes or processes, so in particular no dependence and / or order of these objects, sizes or processes mandatory to each other. If a dependency and / or order are required, this is explicitly stated here or it obviously results for the person skilled in the art when studying the concretely described embodiment.

• 1: einen Schnitt durch ein erstes Beispiel eines elektrischen Pumpenaktors;
• 2: einen Schnitt durch ein zweites Beispiel eines elektrischen Pumpenaktors;
• 3: einen Ausschnitt eines elektrischen Pumpenaktors im Schnitt;
• 4 bis 6: drei perspektivische Ansichten des Gehäuses des ersten Beispiels eines elektrischen Pumpenaktors;
• 7: einen Schnitt durch ein drittes Beispiel eines elektrischen Pumpenaktors;
• 8: eine perspektivische Ansicht des Gehäuses des dritten Beispiels eines elektrischen Pumpenaktors;
• 9: ein Beispiel einer Kupplung mit elektrischem Pumpenaktor; und
• 10 einen Schnitt durch ein viertes Beispiel eines elektrischen Pumpenaktors.

The invention and the technical environment will be explained in more detail with reference to FIGS. It should be noted that the invention should not be limited by the embodiments shown. In particular, unless explicitly stated otherwise, it is also possible to extract partial aspects of the facts explained in the figures and to combine them with other components and findings from the present description and / or figures. In particular, it should be noted that the figures and in particular the illustrated proportions are only schematic. The same reference numerals designate the same objects, so that explanations of other figures can be used if necessary. Show it:

• 1 Fig. 3 is a section through a first example of an electric pump actuator;
• 2 a section through a second example of an electric pump actuator;
• 3 a section of an electric pump actuator in section;
• 4 to 6 three perspective views of the housing of the first example of an electric pump actuator;
• 7 a section through a third example of an electric pump actuator;
• 8th a perspective view of the housing of the third example of an electric pump actuator;
• 9 : an example of a coupling with electric pump actuator; and
• 10 a section through a fourth example of an electric pump actuator.

In the description of the figures, like parts are given the same reference numerals. 1 schematically shows a section through a first example of an electric pump actuator (EPA) 1 with a pump 2 for conveying a hydraulic medium and an electric motor 3 to drive the pump 2 , pump 2 and electric motor 3 are in a one-piece common housing 4 educated. The housing has a single mounting hole 20 on, through which the individual elements in the housing 4 be introduced. The housing 4 In this case has further openings through which, for example, working media in the housing 4 can be performed, but are so small that no mounting can be done through these openings. In particular, these openings are smaller than the smallest diameter of the individual components of the pump 2 and electric motor 3 as described below. The mounting hole 20 is on a first front side 22 of the housing 4 educated.

The electric motor 3 includes an external stator 5 and a trained rotor 6 that with a wave 7 can rotate. The rotor 6 is about a first camp 8th in a storekeeper 9 and about a second camp 10 in a pump cover 11 stored. With the appropriate operation of the stator 5 with an alternating voltage via an electrical connection 12 becomes the rotor 6 set in rotation and so drives the wave 7 at. Via a connecting element 13 becomes a driving gear 14 the pump 2 driven, which in turn is a driven gear 15 drives. The pump 2 thus works on the principle of a gear pump. The gears 14 . 15 are in storage elements 16 stored. The conveying direction of the pump 2 is therefore in this example, depending on the direction of rotation of the gears 14 . 15 into or out of the picture plane. The pump 2 promotes a hydraulic fluid, which in a reservoir 17 is stored, to and from a clutch, not shown, for actuating the same. In the direction of the electric motor 3 is the pump 2 over the pump cover 11 sealed.

Further, a control device 18 trained by the EPO 1 is controlled. The control device 18 is usually designed as a printed circuit board (PCB) and via a plug 19 connected to a system not shown. The mounting hole 20 is through a mounting hole cover 21 locked. The first example of the EPO 1 is constructed so that the assembly is complete from the first end 22 through the mounting hole 20 he follows.

1. a. Ausbilden des Gehäuses 4,
2. b. Einbringen von Pumpenteilen zur Bildung einer Pumpe 2 in das Gehäuse 4 und Montage der Pumpe 4;
3. c. Verschließen der Pumpe 2 mit einem Pumpendeckel 11;
4. d. Montage eines Stators 5 im Gehäuse 4 auf einer der Pumpe 2 gegenüberliegenden Seite des Pumpendeckels 11;
5. e. Montage eines Rotors 6 mit Lager 8, 10 und Welle 7 im Gehäuse 4 innerhalb des Stators 5, so dass die Welle 7 mit einem Antriebsanschluss der Pumpe 2 verbunden ist, und
6. f. Verschließen der Montageöffnung 20 durch einen Abschlussdeckel.

The following is the mounting method of this example of an EPA 1 briefly described. It includes the following steps:

1. a. Forming the housing 4 .
2. b. Introducing pump parts to form a pump 2 in the case 4 and mounting the pump 4 ;
3. c. Closing the pump 2 with a pump cover 11 ;
4. d. Mounting a stator 5 in the case 4 on one of the pump 2 opposite side of the pump cover 11 ;
5. e. Assembly of a rotor 6 with bearings 8th . 10 and wave 7 in the case 4 inside the stator 5 . so that the shaft 7 with a drive connection of the pump 2 is connected, and
6. f. Closing the mounting hole 20 through a cover.

The steps b to e be through the mounting hole 20 carried out. Alternatively, an electric motor 3 pre-assembled in the housing 4 be mounted so that instead of the steps d , and e , an alternative step d , be carried out in which a mounting of an electric motor 3 in the case 4 on one of the pump 2 opposite side of the pump cover 11 he follows.

The pump parts in step b , include in particular driving gear 14 , driven gear 15 and bearing elements 16 , The connection of the shaft 7 with the pump 2 takes place in particular by the connecting element 13 , Between step e and f , can the controller 18 be introduced into the housing. step c in particular by gluing, caulking or screwing the pump cover 11 with the housing 4 respectively.

2 schematically shows another example of an EPA 1 , Reference is made to the description of the first example, only the corresponding differences are described here. Here is the second camp 10 of the rotor 6 in the case 4 stored, since in this example the pump cover 11 not in the case 4 but on a second end face 23 of the housing 4 opposite to the first face 22 of the housing 4 is formed and with screws 24 on the housing 4 fixed. In this example, the assembly of the EPA 1 from both ends 22 . 23 take place through a first mounting opening 25 at the first end 22 and a second mounting opening 25 on the second front side 23 ,

3 shows a detail of an EPO 1 with pump 2 , Depending on the direction of rotation of the driving gear 14 and the driven gear 15 This results in a first conveying direction 27 or a second conveying direction 28 the pump 2 , The valves 29 . 30 cause a promotion in the picture viewed through the delivery lines 31 he follows.

The shown covers of the valves 29 . 30 can be used in any combination. Via a reservoir connection 32 becomes the EPA 1 with the reservoir 17 connected, so that a medium, in particular a working fluid such as hydraulic medium, via the reservoir port 32 to the pump 2 be managed or promoted. The reservoir connection 32 is in the case 4 integrated.

4 to 6 show three perspective views of the housing 4 the first example of the EPO 1 , Reference is made essentially to the statements made above. The housing 4 also has connection elements 33 on top of that the case 4 can be attached to another component, such as a clutch or transmission housing. Furthermore, the housing comprises 4 Pressure sensor recordings 34 for receiving pressure sensors for monitoring of the housing 4 Relative to the corresponding delivery lines 31 It is a capacitor recording 35 formed, which is the inclusion of a capacitor of the control device 18 serves. The capacitor is usually in the capacitor holder 35 bonded. An opening 36 serves to accommodate a socket for the plug 19 ,

7 shows a section through a third example of an EPA 1 , Here is the description of the second example of an EPO 1 referenced, only the differences are shown. The EPO 1 has, in contrast to the second example, an active valve 37 on, by which the flow of hydraulic fluid can be controlled. In the opening 36 is a jack 39 formed with the control device 18 connected is. The socket 39 take the plug 19 on. In this example is a capacitor 38 but compared to the second and first example of the EPO 1 lying and not standing in relation to the housing 4 or the mounting hole cover 21 is trained. Due to the design of an active valve 37 shows the third example of an EPO 1 a slightly changed wiring on.

8th schematically shows a view of the housing 4 of the third example of an EPO 1 , Here, too, reference is made to the comments made above on the first and second examples and only the differences are described. The housing 4 has a valve seat 40 on, in which the valve 37 is introduced.

9 shows very schematically a coupling 41 who have an EPA 1 for actuating the clutch, in particular for carrying out an axial displacement of friction elements.

10 shows a section through a fourth example of an EPA 1 , Reference is made to the description of the above-described examples of an EPO 1 referenced, only the differences are shown. In contrast to the previously described examples of an EPA 1 The fourth example shows a split tube 42 on which between rotor 6 and stator 5 is trained. The can 42 causes a seal between rotating and non-rotating parts of the EPA 1 , As a warehouse 10 an internal angular contact ball bearing is formed, stator 5 and rotor 6 in this example are outside the case 4 pre-assembled and then installed.

LIST OF REFERENCE NUMBERS

1

Electric pump actuator

2

pump

3

electric motor

4

casing

5

stator

6

rotor

7

wave

8th

first camp

9

storekeeper

10

Second camp

11

pump cover

12

Electrical connection

13

connecting element

14

Driving cogwheel

15

Powered gear

16

bearing element

17

reservoir

18

control device

19

plug

20

mounting hole

21

Mounting hole cover

22

First front page

23

Second front side

24

screw

25

First mounting opening

26

Second mounting opening

27

First funding direction

28

Second conveying direction

29

Valve

30

Valve

31

delivery line

32

reservoir port

33

connecting element

34

Pressure Sensor Recording

35

capacitor receiving

36

breakthrough

37

Valve

38

capacitor

39

Rifle

40

valve receiving

41

clutch

42

canned

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been 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.

Cited patent literature

• WO 2012/113368 A2 [0002]

Claims (10)

Electric pump actuator (1), in particular for actuating a clutch (41), in particular in the drive train of a motor vehicle, comprising a pump (2) and an electric motor (3), characterized in that the pump (2) and the electric motor (3) in a one-piece housing (4) are formed, which on at least one end face (22, 23) has a closable mounting opening (20, 25, 26). Electric pump actuator (1) after Claim 1 in which only one end face (22) has a closable mounting opening (20). Electric pump actuator (1) according to one of the preceding claims, wherein the pump (2) and electric motor (3) are arranged one behind the other in an axial direction. Electric pump actuator (1) according to one of the preceding claims, in which at least one valve (37) is integrated in the housing (4). Electric pump actuator (1) according to one of the preceding claims, in which at least one reservoir connection (32) for supplying a medium to the pump (2) is integrated in the housing (4). Electric pump actuator (1) according to one of the preceding claims, in which the pump (2) has a driving gear (14) and a driven gear (15) and the electric motor (3) has a stator (5) and a relative to the stator (5). rotatable rotor (6), wherein the driving gear (14) from the rotor (6) and the driven gear (15) by the driving gear (14) is drivable. Electric pump actuator (1) according to one of Claims 1 to 6 in which two end-side closable mounting openings (25, 26) are formed on opposite end faces (22, 23) of the housing (4). Electric pump actuator (1) according to one of the preceding claims, in which each mounting opening (20, 25, 26) is closed by a cover (11, 21). Coupling (41), in particular in the drive train of a motor vehicle, comprising at least one electric pump actuator (1) according to one of the preceding claims for actuating the clutch (41). Method for mounting an electric pump actuator (1) in a one-piece housing (4) which has a closable mounting opening (20) only at one end face (22), comprising the following steps: a. Forming the housing (4), b. Inserting pump parts (14, 15, 16) to form a pump (2) in the housing (4) and mounting the pump (2); c. Closing the pump (2) with a pump cover (11); d. Mounting an electric motor (3) in the housing (4) on one of the pump (2) opposite side of the pump cover (11), and e. Closing the mounting hole (20) by a cover, wherein the steps b to e are performed through the mounting hole.

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