阅读说明：本技术 用于操纵机动车离合器的具有未包封的线缆的致动器；以及离合器系统 (An actuator having an unencapsulated cable for operating a motor vehicle clutch; and a clutch system ) 是由 丹尼尔·霍恩 欧根·科姆博夫斯基 托比亚斯·科宁格 于 2019-06-13 设计创作，主要内容包括：本发明涉及一种用于操纵机动车离合器的致动器(1),其具有电伺服马达(2)和与伺服马达(2)电联接的导线系统(3),导线系统(3)的至少一个线缆(4a、4b、4c)具有由塑料材料制成的绝缘外壳(5)和连接到伺服马达(2)处的被剥皮的导体部段(6),线缆(4a、4b、4c)不仅在导体部段(6)的区域中,还在与此直接相邻的绝缘外壳(5)的纵向部段(7)中由共同用作密封件的包套包围,包套由热固性或热塑性的、与绝缘外壳的塑料材料不同的塑料材料制成,套筒形状配合和/或力配合地放置在绝缘外壳的纵向部段上,使得套筒至少部分构成直接与包套(8)接触的波形外轮廓(10)。本发明还涉及一种具有该致动器的离合器系统。(The invention relates to an actuator (1) for actuating a motor vehicle clutch, comprising an electric servomotor (2) and a line system (3) electrically coupled to the servomotor (2), wherein at least one cable (4a, 4b, 4c) of the line system (3) has an insulating housing (5) made of a plastic material and a stripped conductor section (6) connected to the servomotor (2), wherein the cable (4a, 4b, 4c) is not only in the region of the conductor section (6), and is surrounded by a sheath which is used as a seal together in a longitudinal section (7) of the insulating housing (5) directly adjacent to the longitudinal section, the sheath is made of a thermosetting or thermoplastic plastic material different from the plastic material of the insulating housing, the sleeve is placed on the longitudinal section of the insulating housing in a form-fitting and/or force-fitting manner, so that the sleeve at least partially forms a wave-shaped outer contour (10) which is in direct contact with the covering (8). The invention also relates to a clutch system with the actuator.)

1. Actuator (1) for actuating a motor vehicle clutch, having an electric servomotor (2) and a wire system (3) electrically coupled to the servomotor (2), wherein at least one cable (4a, 4b, 4c) of the wire system (3) has an insulating housing (5) made of a plastic material and a stripped conductor section (6) connected at the servomotor (2), and the cable (4a, 4b, 4c) is surrounded by a jacket (8) which jointly serves as a seal, not only in the region of the conductor section (6) but also at a longitudinal section (7) of the insulating housing (5) directly adjacent thereto, the jacket (8) being made of a thermosetting or thermoplastic plastic material which is different from the plastic material of the insulating housing (5), and wherein, the sleeve (9) is placed on the longitudinal section (7) of the insulating housing (5) in a form-fitting and/or force-fitting manner, such that the sleeve (9) at least partially forms a corrugated outer contour (10) in direct contact with the sheathing (8).

2. Actuator (1) according to claim 1, characterized in that said insulating housing (5) is made of thermoplastic plastic material.

3. Actuator (1) according to claim 1 or 2, characterized in that the insulating housing (5) is made of polyolefin.

4. Actuator (1) according to any of claims 1 to 3, characterized in that the sleeve (9) is made of a non-ferrous metal alloy.

5. Actuator (1) according to any of claims 1 to 4, characterized in that the sleeve (9) is pushed over its entire length onto a longitudinal section (7) of the insulating housing (5).

6. Actuator (1) according to any of claims 1 to 5, characterized in that the sleeve (9) is fixed on the insulating housing (5) by crimping.

7. Actuator (1) according to any of claims 1 to 6, characterized in that the sleeve (9) is in contact with the capsule (8) or protrudes from the capsule (8) over its entire length.

8. Actuator (1) according to one of claims 1 to 7, characterized in that the sleeve (8) forms an end-side flange (11) protruding in a radial direction from the insulating housing (5), wherein the flanges (11) directly contact the capsule (8) on their axially facing sides.

9. Actuator (1) according to one of claims 1 to 8, characterized in that the plurality of cables (4a, 4b, 4c), each surrounded by a sleeve (9), are jointly surrounded by the sheath (8) not only on their conductor sections (6) but also on the longitudinal sections (7) of their insulating housing (5) directly adjacent to the conductor sections (6).

10. A clutch system for a drive train of a motor vehicle, having a clutch and an actuator (1) according to any one of claims 1 to 9 acting on the clutch in a regulated manner.

Technical Field

The invention relates to an actuator for actuating a motor vehicle clutch, i.e. a motor vehicle clutch, such as a car, truck, bus or other commercial vehicle, having an electric servomotor and a line system electrically coupled to the servomotor. The invention also relates to a clutch system for a drive train of a motor vehicle, having a clutch and the actuator.

Background

Actuators for clutch operation are well known in the art. In this respect, for example, DE 102015206786 a1 discloses an actuator, referred to as an actuator system, in particular for actuating a clutch system or a brake system of a motor vehicle. However, no details for forming the wire system connected to the servomotor are disclosed in this respect.

In the known actuators, it has also proven to be disadvantageous that the respective connection regions of the cables of the wire system on the servomotor are often not sufficiently sealed. However, it should be ensured that, during the production of the inserted sheath of the connection region, no gaps arise between the cable and the sheath, through which gaps liquid can penetrate into the connection region during operation, so that corrosion of the connection region is promoted. The connection region is thus reliably protected against the presence of liquids, such as spray water, oil, lubricants, fuels and other acids, in the surroundings of the servomotor during operation for as long as possible. It should also be ensured that the components surrounding these connection regions are as flammable as possible.

The prior art is also known from EP 2245705 a 1. Disclosed herein is a plug connector element with a sealing mechanism in the cable connection area. However, the embodiments converted here are relatively unsuitable for the environmental conditions present in the automotive field, in which considerably higher requirements are placed on corrosion resistance and defined structural space conditions.

Disclosure of Invention

The object of the present invention is therefore to eliminate the disadvantages known from the prior art and in particular to provide an actuator which on the one hand reliably prevents corrosion damage and on the other hand has a configuration which is as compact as possible.

This object is achieved by an actuator according to the invention for actuating a motor vehicle clutch, wherein the actuator according to the invention for actuating a motor vehicle clutch has an electric servomotor and a line system electrically coupled to the servomotor, wherein at least one cable of the line system further comprises an insulating housing made of a plastic material and a stripped conductor section connected to the servomotor (in a connection region), and the cable is surrounded not only in the region of the conductor section but also in a longitudinal section of the insulating housing immediately adjacent to the conductor section by a jacket which jointly serves as a seal and is formed from a thermosetting or thermoplastic plastic material which is different from the plastic material of the insulating housing, and wherein a sleeve is placed on the longitudinal section of the insulating housing in a form-fitting and/or force-fitting manner, the sleeve is at least partially formed with a wave-shaped outer contour, which is in direct contact with the capsule.

With such a sheath according to the invention at the respective connection region of the cables on the servomotor side, it is possible to design the sealing distance along the cables, which is ensured by the sheath, as short as possible. The additional sleeve provides an element which on the one hand secures the sleeve as strongly as possible and on the other hand prevents undesirable gaps and thus leaktightness from forming during the production process when the cable is encapsulated by the sheath by injection molding. In this way, a particularly stable sealing of the cable connection region is achieved.

Other advantageous embodiments are described in more detail below.

If the insulating housing is made of a thermoplastic material, the insulating housing is particularly stable with respect to the usual operating media of the motor vehicle.

In this respect, it is particularly advantageous if the insulating housing consists of a polyolefin.

The device according to the invention is particularly effective if the sleeve is made of a thermosetting plastic material.

The sleeve is more strongly realized if it is made of a non-ferrous metal alloy, such as a non-ferrous metal alloy containing copper, e.g. brass, bronze, etc.

It is also advantageous if the sleeve is pushed over its entire length onto a longitudinal section of the insulating housing. Thus, the sleeve does not protrude beyond the insulating housing along the cable. The sleeve thus serves only as a connecting element for fixing the capsule to the cable/insulating sheath. Thereby achieving a reliable seal.

It is also advantageous in connection with the sleeve to fix the sleeve on the insulating housing by means of a crimped/crimped connection.

The sheath is particularly firmly connected to the cable if the sleeve is contacted/surrounded over its entire length by the sheath. Alternatively, it is also advantageous if the sleeve protrudes from the capsule.

In this context, it is also advantageous if the sleeve forms an end-side collar which projects in the radial direction from the insulating housing, wherein the collar is in direct contact with the sheathing in the axial direction thereof, i.e. on the sides facing away from one another when viewed in the longitudinal direction of the cable. The fixation of the sheath to the sleeve and thus to the cable is thereby further strengthened.

It is also expedient if a plurality of undulations of the sleeve are connected to the flange in the axial direction of the cable, wherein the envelope bears against the sleeve over the entire longitudinal extent of the undulations. This further increases the holding force of the jacket on the jacket side.

Furthermore, it is advantageous if the plurality of cables, which are each surrounded by the sleeve, are surrounded by the (same) jacket both on their conductor sections and on the longitudinal sections of their insulating jacket directly adjacent to the conductor sections. This further reduces the manufacturing cost.

With regard to the sheath, it is further preferred that it is formed directly as an injection-molded encapsulation/casting, and that the sheath is then applied directly around the cable while still in a liquid state in a molding process (uformvariegang). After the material forming the sheath has hardened, an effective sealing of the respective connection region of the cable is again achieved.

Furthermore, according to at least one of the above-described embodiments, the invention relates to a clutch system for a drive train of a motor vehicle, having a clutch and an actuator according to the invention acting on the clutch in a regulated manner.

In other words, a waterproof injection molding or potting of the transition (connection region) of the wires (cables) in the thermoset plastic part or thermoplastic plastic part (jacket) is thus achieved. Each of the wires has a sheath (insulating housing) which is respectively crimped with a metal sleeve (sleeve). Subsequently, all wires are preferably encased/cast together in a thermoset plastic (sheath). The sleeve has a labyrinth seal type (wavy outer contour) or a corresponding shaping for this function. In addition, attention is paid to the materials used, for example, thermoset injection molded encapsulants (envelopes). The load-bearing capacity and the length of the sealing distance can thus be effectively increased, since by selecting the materials (polyolefin for the wire jacket (insulating housing) and thermosetting plastic for the injection-molded encapsulation (sheathing)), a particularly good connection is also achieved in consideration of the elevated temperatures during production. The material of the sleeve is preferably a copper alloy, so that the sleeve reliably prevents a gap from forming between the insulating housing and the sheathing during the production process. Therefore, a sealing mechanism for cables (cables) with a multi-crimp sleeve is proposed in principle.

Drawings

The invention will now be explained in more detail with reference to the drawings.

The figures show that:

fig. 1 shows a perspective view of an actuator according to a preferred embodiment of the invention, partially shown in longitudinal section, wherein the principle configuration of the actuator on the side of its servomotor and its part of the wire system connected to the servomotor is diagrammatically shown,

fig. 2 shows a detailed view of the actuator according to fig. 1 in the region of the connection of a plurality of cables of the wire system at the servomotor.

Figure 3 shows a perspective view of the conductor system used in figures 1 and 2 including a cable and a plug,

FIG. 4 shows a longitudinal section of the cables of the cable system in the connection region on the servomotor side, the sheath surrounding the cables and being fixed to each cable by means of a respective sleeve being clearly visible, and

fig. 5 shows a perspective view of the connection region shown in fig. 4 without a sheath.

Detailed Description

The figures are merely schematic and are used only for the understanding of the present invention. Like elements have like reference numerals.

The actuator 1 according to the invention is in principle an electric actuator 1 for operating a clutch of a motor vehicle drive train. The actuator 1 is therefore a component of the clutch system during its operation and acts in a regulated manner on the clutch of the clutch system, for example a friction clutch.

The actuator 1 usually has an electric servomotor 2 (also referred to as an electric motor). The servomotor 2 in turn has a stator 14 and a rotor 13 which is rotatable relative to the stator 14. The stator 14 is accommodated in a housing 15 of the actuator 1. The rotor 13 is arranged radially outside (with respect to its axis of rotation) the stator 14. By means of the gear 16, the rotary movement of the rotor 13 is converted in a typical manner into an axial adjusting movement on the side of the release bearing 17 when the servomotor 2 is activated, in order to release the clutch. In this case, it should be noted that the actuator 1 is constructed in terms of its other construction in accordance with the actuator system disclosed in DE 102015206786 a 1. The embodiment details additionally described with respect to the actuator system with the aid of DE 102015206786 a1 are therefore suitable for the actuator 1 according to the invention integrated therein.

In addition to the servomotor 2, the actuator 1 also has a line system 3, which can be seen in fig. 1. The wire system 3 has a plurality of wires 4a to 4d (also called current wires) which extend from the plug 12 towards the servomotor 2. Three of these cables, i.e., a first cable 4a, a second cable 4b, and a third cable 4c, are connected to the servomotor 2 during operation for controlling the servomotor 2. For this purpose, fig. 5 shows in detail how the corresponding connection regions 22 of the first to third cables 4a to 4c on the side of the plurality of contacts 18a to 18c of the servomotor 2 are formed. The jacket 8, which is described in more detail below, is omitted from fig. 5. The first to third cables 4a to 4c are each constructed in the same manner and are connected to one of the contacts 18a, 18b or 18c, so that for the sake of simplicity only the construction and connection of the first cable 4a on the first contact 18a will be described below to represent the construction and connection of the other (second and third) cables 4b, 4c at the (second and third) contacts 18b, 18 c.

The first cable 4a is connected to the first contact 18 a. The first cable 4a is formed as a single core cable. The first cable 4a does not have its insulating housing 5/stripped at one end, wherein the end of the conductor 19 stripped/exposed first cable 4a is hereinafter referred to as conductor section 6. The conductor section 6 is directly connected/fixed to the first contact 18a to form a connection region 22. The insulating housing 5 starts behind the conductor section 6 and extends continuously to the plug 12, viewed along the cable 4a from the connection region 22 (fig. 3). The insulating housing 5 is in this embodiment made of polyolefin.

As can also be seen in detail in fig. 4 and 5 and in fig. 2 in an overview, the sleeve 9 is fixed to the insulating housing 5 in a form-fitting and force-fitting manner, the sleeve 9 is composed of a crimpable metal, i.e. a crimpable non-ferrous metal alloy, the sleeve 9 is designed as a crimping sleeve (Crimp-H ü ls) and is therefore fixed to the insulating housing 5 from the radially outer side (viewed relative to the longitudinal extent of the first cable 4 a) by means of a crimping/crimping connection, as can be seen in a longitudinal section of the sleeve 9 according to fig. 4, the sleeve 9 has a wavy outer contour 10 as a result of the crimping, the crimping being embodied as a multiple crimping, so that the outer contour 10 of the sleeve 9 has a plurality of wavy outer contours, overall, four wave troughs 20 and three wave crests 21 are formed, the sleeve 9 is thereby crimped in this way and is pressed from the outside continuously in the radial direction by plastic deformation onto the insulating housing 5 on the basis of the crimping, so that the insulating housing 5 is compressed in the radial direction by the sleeve 9 by a certain amount, furthermore, the crimping is embodied so that the sleeve 9 forms, in its end region facing the end of the conductor section 6, which in principle also forms a flange, in the opposite manner of the sleeve 11, on the other end section of the insulating.

It is also known from fig. 4 that the sleeve 9 is selected and positioned in terms of its length such that it is arranged only on the longitudinal section 7 of the insulating housing 5. The sleeve 9 thus ends towards the conductor section 6 before the end of the insulating housing 5 and does not protrude axially beyond the insulating housing 5, viewed along the first cable 4 a.

As shown in fig. 2 to 4, the jacket 8 is disposed around the first cable 4 a. The sheath 8 is realized as an injection/cast sheath and forms the sheath 8 completely abutting around the connection region 22 of the first cable 4 a. The sheath 8 thus serves to seal the conductor section 6 in the connection region 22 at the first contact 18 a. In the completely assembled state, the sheath 8 is therefore arranged completely around the conductor section 6 and the first contact 18a in order to seal them from the environment. Furthermore, the sheath 8 extends as far as, viewed along the first cable 4a, so that it completely surrounds the sleeve 9 in its longitudinal direction. The sleeve 9 is thus completely embedded in the sheath 8. The sheath 8 therefore also surrounds the longitudinal section 7 of the first cable 4a from the outside. In addition, it can be seen in fig. 4 that the sheath 8 is also arranged on mutually opposite axial sides of the flange 11 and is therefore firmly supported on the flange 11. This causes the sheath 8 to be additionally fixed axially (by the sleeve 9) to the respective first to third cables 4a, 4b, 4 c.

The sheath 8 is made of a thermosetting plastic material, but in other embodiments it is also made of a thermoplastic plastic material. The sheath 8 is therefore particularly resistant to the environmental conditions which occur during operation of the vehicle and which promote corrosion.

As is also apparent from fig. 4, the second cable 4b and the third cable 4c are surrounded by the same sheath 8 at their (second and third) contacts 18b, 18c in the same manner as the first cable 4 a. The fourth cable 4d has a jacket not described further apart from the jacket 8.

In other words, according to the invention, the sleeve 9 is applied to the conductor housing (insulating housing 5) by means of a tool, for example a crimping tool, said sleeve thereby being connected to the conductor housing 5 in a form-fitting manner. A compression is generated between the outer mantle 5 and the sleeve 9, which provides a seal. The plastic (sheath 8) bonds better at the sleeve 9 than on the various wire jacket materials and therefore provides a higher seal over a shorter distance, as well as higher thermal and mechanical stability. Due to the curled profile (see fig.) the sealing distance along the sleeve 9 is extended (compared to labyrinth seals) in addition to a better connection. The sleeve 9 additionally increases the mechanical load capacity of the system. The tensile force of the wires (cables 4a, 4b, 4c) is significantly greater than without the sleeve 9. During the injection molding process, the cable jacket (insulating housing 5) is subjected to relatively high temperatures (up to 180 ℃) and thus expands accordingly. After cooling the wires 4a, 4b, 4c and the injection molding envelope 8 following the injection molding process, gaps may occur between the wire jacket 5 and the thermosetting plastic (sheath 8) without the sleeve 9 due to the different coefficients of expansion; however, the sleeve 9 prevents the formation of gaps during injection molding.

List of reference numerals

1 actuator

2 servo motor

3-conductor system

4a first cable

4b second cable

4c third Cable

4d fourth cable

5 insulating housing

6 conductor section

7 longitudinal section

8 wrap

9 Sleeve

10 outer contour

11 Flange

12 plug

13 rotor

14 stator

15 casing

16 driving device

17 Release bearing

18a first contact

18b second contact

18c third contact

19 conductor

20 trough of wave

21 wave crest

22 connecting the zones.