DE102017109560B4 - Device for automated actuation and system with this device - Google Patents

Abstract

The invention relates to a device (21) for automated actuation, in particular of a transmission (20) which can be shifted between several gears, with a longitudinal actuating element (28) which can be moved back and forth, and with at least one point (35) to be lubricated with a lubricating medium.
In order to simplify the actuation, in particular of a transmission which can be shifted between several gears, the elongate actuating element (28) comprises a lubricating medium channel (32) which connects a lubricating medium reservoir (38) to the point (35) to be lubricated.

Description

The invention relates to a device for automated actuation, in particular a switchable between multiple gears transmission, with a reciprocable elongated actuator, and at least one with a lubricating medium to be lubricated point. The invention further relates to a system with a lubricating medium sump and with such a device.

From the amended German patent DE 19713 423 C5 are known an apparatus and a method for the automated operation of a switchable between several gears transmission with an at least automatically operable at a gear change torque transmission system, with at least one driven by a drive unit actuator and at least one transmission side arranged operable switching element.

From the JP 2015-117806 A and also from the JP 2015-121242 A In each case a wet double clutch is known. The fluid is transported through a fluid channel from a reservoir into the interior of the double clutch. The fluid channel is located in a carrier of the double clutch, which is itself axially movable to close the fluid channel.

Similar devices for distributing a cooling fluid, in which the fluid is distributed within a channel of the piston or punch movable to control the fluid, are known from US 5,156,237 US 2002/0033314 A1 and DE 10 2010 048 731 A1 known.

From the US 4 541 510 A a transmission is known, which comprises shift forks, or a shift fork shaft, which include a fluid channel for transporting lubricant to the pawl. A similar gear is also from the JP 2010-196880 A known.

The object of the invention is to simplify the automated actuation with a reciprocable elongate actuating element and with at least one point to be lubricated with a lubricating medium.

The object is achieved in a device for automated operation with a reciprocable elongated actuating element and with at least one to be lubricated with a lubricating body by the features of claim 1.

Further embodiments of the invention are described in the subclaims.

According to the invention, the elongate actuating element comprises a lubricant medium channel which connects a lubricant medium reservoir with the point to be lubricated and / or to be tempered. The elongate actuating element, in addition to its actual actuating function, supplies the lubricant to be lubricated and / or to be tempered with lubricant and / or tempering medium. This improves the function of the device and increases its life. A preferred embodiment of the device is characterized in that the elongate actuating element for the representation of the lubricating medium channel is hollow inside. The execution of the elongated actuating element as a hollow shaft manufacturing technology is relatively easy to implement. The elongate actuating element is advantageous for the representation of the lubricating medium channel open at both ends. This allows in a simple manner an inlet at one end and an outlet of lubricating medium and / or tempering at the other end of the elongate actuating element.

A further preferred embodiment of the device is characterized in that a free end of the elongate actuating element is mounted in a blind hole, which contains the lubricant reservoir and represents a closed displacement, which is bounded by the free end of the elongate actuating element. As a free end of the elongated actuating element, an outstanding for example from an actuator end of an actuator shaft is called. At the free end of the elongate actuating element, for example, actuating elements, such as shift fingers, are provided, with which in conjunction with other elements, in particular transmission elements, an actuating operation, such as a switching operation of a previously selected gear in the transmission, can be performed. The arrangement of the free end of the elongate actuating element in the blind hole can be achieved in a simple manner, a pumping action of the elongate actuating element, when the elongated actuating element is moved in an actuating operation, for example in a selection operation, in particular in the transmission, in the axial direction. For sealing between the free end of the elongated actuating element and the blind hole, for example, a gap seal can be used. Alternatively or additionally, a seal may be mounted on the end face at the free end of the elongate actuating element.

A further preferred embodiment of the device is characterized in that the blind hole for receiving the Lubricating medium has a larger volume than the lubricant channel. As a result, the previously described pumping action of the elongate actuating element can be achieved in a simple manner.

A further preferred embodiment of the device is characterized in that the elongate actuating element is combined with a line adapter which extends the lubricant medium channel of the elongated actuating element to the point to be lubricated. The line adapter comprises, for example, an angled pipe extension at the end remote from the lubricating medium reservoir end of the elongate actuating element. Lubricating medium can be directed from the elongated actuating element to the point to be lubricated via the angled tubular extension.

The device according to the invention is characterized in that the elongate actuating element is an actuator shaft of a mechanical switching actuator of a gear shiftable between several gears. The mechanical switching actuator is shortened referred to as an actuator. The actuator comprises at least one electric motor, with which an actuator movement can be generated, which causes a rotation and / or an axial movement of the actuator shaft. The actuator may also include two electric motors. Then, with one of the electric motors, an axial movement of the actuator shaft can be effected, for example, to perform a selector movement with an actuating element, such as a shift finger, at one end of the actuator shaft. With the other electric motor, a rotation of the switching shaft or actuator shaft can be effected, for example, to perform a switching operation with the actuating element, such as the shift finger. The mechanical switching actuator comprises, for example, a spindle drive for converting a rotational movement of an electric motor shaft into an axial movement of the actuator shaft. Axial means in the direction or parallel to a longitudinal axis and / or axis of rotation of the actuator shaft. The lubricating medium and / or temperature control medium is, for example, oil, in particular gear oil, or fat, which is also referred to as lubricating grease. The spindle drive is used in the switching actuator to represent a translation stage. The efficiency of this translation stage, so for example, lubricated with grease spindle drive is highly temperature dependent. This temperature dependence influences the dynamics when shifting the transmission, which is an important parameter in automated transmissions. The lubrication and / or temperature control at the point to be lubricated and / or to be tempered, for example the spindle drive, can be improved by the lubricant medium channel in the actuator shaft in such a way that the best possible efficiency can be achieved for the spindle drive over the entire operating temperature range.

The above object is alternatively or additionally solved by a system with a lubricating medium sump and with a previously described device. About the elongated actuator, the point to be lubricated can be supplied in a particularly advantageous manner with lubricating medium from the lubricating medium sump.

A preferred embodiment of the system is characterized in that the lubricant reservoir is in communication with the lubricating medium sump via a connecting channel. By an active use of the lubricating medium in the sump can be ensured in a simple manner that there is always sufficient lubricant and / or tempering in the lubricant reservoir.

A further preferred embodiment of the system is characterized in that the connecting channel between the lubricating medium sump and the lubricant reservoir is released or closed in response to an axial movement of the elongate actuating element. Then, the free end of the elongate actuating element in the blind hole is a valve slide. The connecting channel then represents a control connection, which can be designed as a bore. This hole can be called a pilot hole and works much like a sniffer hole in clutch actuators.

Another preferred exemplary embodiment of the system is characterized in that the connecting channel between the lubricating medium sump and the lubricant reservoir is closed by the elongate actuating element when the elongate actuating element moves with its free end into the lubricant reservoir. Then, the elongated actuating element acts much like a piston through which the pumping action described above is generated. The lubricating medium and / or tempering medium then located in the closed lubricant reservoir is then forced through the lubricant passage in the elongate actuator to the location to be lubricated and / or tempered.

In a method for automated actuation, in particular a switchable between several gears transmission, with an elongated actuator, in particular with a mechanical switching actuator, which comprises an actuator shaft and having at least one to be lubricated with a lubricant body, in particular with a device described above, is used the elongate actuating element for representing a lubricant pump, is conveyed with the lubricating medium to one or the point to be lubricated. As a result, the lubrication and / or temperature control at the at least one point to be lubricated and / or tempered, for example a mechanical spindle drive, can be maintained over the entire operating temperature range.

Further disclosed are a switching actuator, an elongate actuator, in particular an actuator shaft, and a conduit adapter for a previously described device. The parts mentioned are separately tradable.

• 1 eine vereinfachte Schnittdarstellung einer Vorrichtung zur automatisierten Betätigung eines Getriebes mit einem mechanischen Schaltaktor, der einen Spindeltrieb umfasst;
• 2 den mechanischen Schaltaktor aus 1 in einer anderen Schnittdarstellung mit einer Aktorwelle;
• 3 einen ähnlichen Schaltaktor wie in 2 mit einer als Hohlwelle ausgeführten Aktorwelle, die mit einem freien Ende in einem Sackloch gelagert ist, das mit einem Schmiermediumsumpf in Verbindung steht, mit der Aktorwelle in ihrer höchsten Position;
• 4 die Vorrichtung aus 3 mit der Aktorwelle in ihrer tiefsten Position; und
• 5 eine schematische Darstellung der Vorrichtung aus 3, die dazu dient, die Dimensionierung der Volumina, die mit Schmiermedium gefüllt sind, zu veranschaulichen.

Further advantages, features and details of the invention will become apparent from the following description in which, with reference to the drawings, various embodiments are described in detail. Show it:

• 1 a simplified sectional view of an apparatus for automated operation of a transmission with a mechanical switching actuator comprising a spindle drive;
• 2 the mechanical switch actuator off 1 in another sectional view with an actuator shaft;
• 3 a similar switching actuator as in 2 with an actuator shaft designed as a hollow shaft, which is mounted with a free end in a blind hole, which communicates with a lubricating medium sump, with the actuator shaft in its highest position;
• 4 the device off 3 with the actuator shaft in its lowest position; and
• 5 a schematic representation of the device 3 , which serves to illustrate the dimensioning of the volumes filled with lubricating medium.

In the 1 and 2 is a device 1 for automated operation of a switchable between multiple gears transmission shown in various sectional views. The gear is in the 1 and 2 not shown and in the 3 and 4 only by a reference number 20 indicated.

The device 1 includes a mechanical switch actuator 3 with a spindle drive 6 in an actuator housing 7 is arranged. Mechanical switch actuators may include one or two motors. The motors are preferably electric motors 4 , The spindle drive 6 serves at the mechanical switching actuator 3 for displaying a kinematic transmission path.

In 2 you see that an actuator shaft 8th , which is also referred to as a shift shaft, with a free end 10 from the actuator housing 7 of the mechanical switching actuator 3 protrudes. On the actuator shaft or selector shaft 8th are outside of the actuator housing 7 actuators 9 appropriate. The actuators 9 For example, at least one shift finger is used to engage a previously selected gear in the transmission.

In the mechanical switch actuator 3 a switching movement is generated by the spindle drive lubricated with a lubricating medium such as grease or oil 6 is pressed. The efficiency of a translation stage performing spindle drive 6 is very temperature dependent. This behavior or this temperature dependency influences the dynamics when shifting the transmission, which is a very important parameter in automated transmissions.

In the 3 and 4 is a device 21 for automated operation of a shiftable between multiple gears transmission 20 shown in longitudinal section and in various operating states. Due to the design of the device 21 the lubrication and / or temperature can be advantageously improved so that for the in the device 21 integrated spindle drive over the entire operating temperature range of the device 21 the best possible efficiency can be achieved.

This is advantageously achieved by an active use of a lubricating medium, in particular transmission oil, from a lubricating medium sump for the lubrication and / or temperature control of the spindle drive. The lubricating medium sump is in the 3 and 4 through wavy lines 41 and 42 indicated.

The mechanical switching actuator 23 includes an actuator housing 27 , in which the (not designated and shown) spindle drive is arranged. An actuator shaft 28 , which is also referred to as a shift shaft, projects with a free end 30 from the actuator housing 27 out (into the 3 and 4 below). At the actuator shaft 28 are outside of the actuator housing 27 actuators 29 provided, which comprise at least one shift finger.

The actuator shaft 28 in the 3 and 4 illustrated mechanical Schaltaktors 23 is designed as a hollow shaft. This can be done with the actuator shaft 28 a pumping action during operation of the switch actuator 23 being represented. The pumping action of the switching actuator 23 can be particularly advantageous a side effect in a selection movement of the Schaltaktors 23 his. In the execution of the selection movement, the actuator shaft or shift shaft 28 moved in the axial direction, ie in the 3 and 4 down or up.

In the actuator shaft designed as a hollow shaft 28 runs a lubricant channel 32 , The lubricant channel 32 is by a pipe extension 34 executed cable adapter 33 to a location to be lubricated and / or tempered 35 in the actuator housing 27 extended. For this purpose, one end of the tube extension 34 Angled at ninety degrees. At the free end of the tube extension 34 of the cable adapter 33 Occurs lubricating medium, which is advantageous for lubrication of the spindle drive in the actuator housing 27 serves.

The hollow shaft or actuator shaft 28 puts almost an oil line to the point to be lubricated 35 This lubricating medium line or oil line goes from a lubricant reservoir 38 from a blind hole 39 is limited, in which the actuator shaft 28 with her free end 30 is stored. The blind hole 39 is in a housing body 40 recessed, for example, part of a (not shown) housing of the transmission 20 is.

The housing body 40 with the blind hole 39 is in by the two wavy lines 41 . 42 indicated lubricating medium sump or transmission oil sump arranged. The volume of the blind hole 39 particularly advantageously provides a closed displacement volume for the free end 30 the actuator shaft 28 In addition, the blind hole represents 39 in the housing body 40 a transmission-side support bearing for the shift shaft or actuator shaft 28 The support bearing is with the blind hole 39 in the housing body 40 almost executed as a closed cylinder.

The blind hole 39 is via a connection channel 44 with the lubricating medium sump 41 . 42 in connection. The connection channel 44 is as a through hole 45 , in particular as a transverse bore, in the housing body 40 executed. Here is the connection channel 44 Advantageously arranged so that the connection between the blind hole 39 and the lubricating medium sump 41 . 42 through the actuator shaft or shift shaft 28 is only released when the actuator shaft or shift shaft 28 , as in 3 is shown in its highest selection position.

In this state, the blind hole fills 39 , which is the support bearing for the actuator shaft 28 represents, with lubricating medium, in particular with oil, from the lubricating medium sump 41 , When the shift shaft 28 is moved to a lower selection position, ie from their in 3 moves shown highest position down, then closes the stem 28 the connection channel 44 , which thus represents a control bore.

In addition, by itself in the 3 and 4 downwards moving selector shaft 28 that in the blind hole or support bearing 39 displaced lubricant to the desired pumping action of the actuator 23 display. That by the downwardly moving switching shaft 28 displaced lubricant is from the blind hole 39 through the lubricant channel 32 advantageous to the point to be lubricated 35 in the actuator housing 27 promoted, as in 4 through arrows 48 . 49 is indicated.

The seal between the selector shaft 28 and the support camp 39 is in the representation of 3 and 4 designed as a gap seal. Other than shown, the seal can also by means of a on the Schaltwellenstirnseite at the free end 30 attached seal can be realized.

In 5 is the device 21 from the 3 and 4 simplified illustrated schematically. By a double arrow 51 is the effective as a piston surface face of the switching shaft or actuator shaft 28 indicated. By arrows 53 . 54 is the cross-sectional area of the lubricant channel 32 indicated. By a dashed double arrow 55 is the stroke length of the switching shaft 28 indicated. By a dashed double arrow 56 is the length of the lubricant channel 32 indicated.

For a minimum lubrication effect by the out of the blind hole 39 conveyed lubricant at the point to be lubricated 35 To ensure the volumes of the lubricant must be dimensioned so that a product from the piston surface 51 the switching shaft 28 with the stroke length 55 the switching shaft 28 larger than a product of the cross-sectional area 53 . 54 of the lubricant channel 32 with the length 56 of the lubricant channel 32 is.

LIST OF REFERENCE NUMBERS

1

device

3

mechanical switch actuator

4

electric motor

6

spindle drive

7

actuator housing

8th

elongated actuator, in particular actuator shaft

9

actuators

10

free end

20

transmission

21

device

23

mechanical switch actuator

27

actuator housing

28

elongated actuator, in particular actuator shaft

29

actuators

30

free end

32

Lubricating medium channel

33

line adapter

34

Tubular extension

35

location

38

Lubricating medium Reservoir

39

blind

40

housing body

41

wavy line

42

wavy line

44

connecting channel

45

Through Hole

48

arrow

49

arrow

51

double arrow

53

arrow

54

arrow

55

double arrow

56

double arrow

Claims (9)

An automated actuation device (21) comprising a reciprocable elongate actuator (28) and at least one location (35) to be lubricated with a lubricating medium, the elongate actuator (28) including a lubricating fluid passage (32) containing a lubricating fluid reservoir (38) connects to the point to be lubricated (35), characterized in that the elongate actuating element (28) is an actuator shaft of a mechanical switching actuator (23) of a switchable between several gears transmission (20). Device after Claim 1 , characterized in that the elongate actuating element (28) for displaying the lubricating medium channel (32) is hollow inside. Device according to one of the preceding claims, characterized in that a free end (30) of the elongate actuating element (28) is mounted in a blind hole (39) which contains the lubricating medium reservoir (38) and represents a closed stroke volume, that of the free end (30) of the elongate actuating element (28) is limited. Device after Claim 3 , characterized in that the blind hole (39) for receiving the lubricating medium has a larger volume than the lubricating medium channel (32). Device according to one of the preceding claims, characterized in that the elongate actuating element (28) is combined with a line adapter (33) which extends the lubricating medium channel (32) of the elongated actuating element (28) towards the point (35) to be lubricated. System with a lubricating medium sump (41, 42) and with a device (21) according to one of the preceding claims. System after Claim 6 , characterized in that the lubricating medium reservoir (38) via a connecting channel (44) with the lubricating medium sump (41,42) is in communication. System after Claim 7 , characterized in that the connecting channel (44) between the lubricating medium sump (41,42) and the lubricating medium reservoir (38) in response to an axial movement of the elongate actuating element (28) is released or closed. System after Claim 8 , characterized in that the connecting channel (44) between the lubricating medium sump (41, 42) and the lubricating medium reservoir (38) is closed by the elongate actuating element (28) when the elongate actuating element (28) engages with its free end (30) in the lubricant reservoir (38) moves into it.

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