Lubricant trap cover for transmission housing of motor vehicle transmission

Abstract

The invention relates to a lubricant trap cover for a transmission housing of a motor vehicle transmission, comprising a separating section, which surrounds a receiving region and is separated from a lubricant collecting region, and in the mounted state of the lubricant trap cover in the transmission housing, the lubricant trap cover is arranged in the housing. A receiving space for a rotatable transmission element is defined in the receiving area, and the lubricant collecting area is arranged in a vertically lower area of the lubricant collecting cover in the installed position of the lubricant collecting cover, and in the installed state of the lubricant collecting cover in the transmission housing, the lubricant collecting area is arranged in the vertically lower area of the lubricant collecting cover. A lubricant reservoir of the motor vehicle transmission is arranged in the lubricant collecting area. A suction section is provided, which is designed to be located radially outside of the separation section, in the lubricant collection region. The suction section has a suction connection and at least partially delimits a suction space for supplying lubricant from the lubricant reservoir in the installed state of the lubricant capture hood, the suction connection leading into the suction space.

Description

Technical Field

[0001] The invention relates to a lubricant catching cap for a transmission housing of a motor vehicle transmission, the lubricant catching cap comprising a cap-like separating section which at least partially encloses a receiving area and is thereby separated at least from a lubricant collecting area, in which a receiving space for a rotatable transmission element of the motor vehicle transmission is defined in the installed state of the lubricant catching cap in the transmission housing, the lubricant collecting area being arranged in the installed position of the lubricant catching cap in the vertically lower area of ​​the lubricant catching cap, and in the installed state of the lubricant catching cap in the transmission housing, a lubricant reservoir of the motor vehicle transmission being designed in the lubricant collecting area. The invention further relates to a motor vehicle transmission, in whose transmission housing the aforementioned lubricant catching cap is arranged. Background Art

[0002] In motor vehicle transmissions, areas and components to be lubricated and / or cooled, such as tooth meshing, bearing points, are usually supplied with lubricant by circulating lubrication. For this purpose, the respective areas and components are usually integrated into a lubricant supply system, via which the lubricant is directed to the respective areas and the respective components in a targeted manner. In the lubricant supply system, the lubricant is usually drawn from a lubricant reservoir by a delivery pump and delivered to the respective areas or the respective components. The lubricant reservoir is usually defined by the transmission housing of the motor vehicle transmission as an area in which the lubricant accumulates after being delivered to the respective areas or the respective components. In this case, a lubricant capture cap is also locally arranged in the transmission housing, via which the accumulation of the lubricant can be influenced by the targeted separation of a plurality of areas.

[0003] US 2006 / 0048800 A1 discloses a motor vehicle transmission in the form of an automatic transmission, wherein a differential gear set is also accommodated in a transmission housing. In the differential gear set, a differential cage is connected to a drive gear in a rotationally fixed manner, and the drive gear is arranged together with the differential cage in a receiving space defined for this purpose in the transmission housing. A lubricant catching hood is also provided in the transmission housing, which, in conjunction with a further housing element, partially surrounds the drive gear and the differential cage and thereby also partially separates the receiving space from a lubricant reservoir, which is defined in the transmission housing vertically below the receiving space. In this case, a defined lubricant level is achieved in the receiving space and therefore also in the region of the drive gear and the differential cage, wherein a gap is defined below between the lubricant catching hood and the further housing element, through which gap the lubricant can flow out in the direction of the lubricant reservoir. Summary of the invention

[0004] Starting from the above-mentioned prior art, the object of the present invention is now to provide a lubricant capture cap, by means of which, on the one hand, at least partial separation of the receiving area from the lubricant collecting area can be designed in a reliable manner and, during its use in the transmission housing of a motor vehicle transmission, on the other hand, a structure of the lubricant supply system that is as compact as possible can be shown.

[0005] This object is achieved starting from the preamble of claim 1 in conjunction with its characterizing features. The subsequent dependent claims each reflect an advantageous development of the invention. A motor vehicle transmission is furthermore the subject of claims 14 and 15, in which a lubricant catch cap according to the invention is arranged in a transmission housing of the motor vehicle transmission.

[0006] According to the present invention, the lubricant capture cap comprises a cap-like separating section which at least partially surrounds a receiving area and is thereby separated at least from a lubricant collecting area, in which a receiving space for a rotatable transmission element of a motor vehicle transmission is defined when the lubricant capture cap is installed in the transmission housing, the lubricant collecting area being arranged in a vertically lower area of ​​the lubricant capture cap in the installed position of the lubricant capture cap, and in which a lubricant reservoir of the motor vehicle transmission is designed when the lubricant capture cap is installed in the transmission housing.

[0007] Therefore, in the lubricant capture cap according to the invention, a separation section is provided, which is provided to at least partially enclose the receiving area and thereby achieve separation at least from the lubricant collecting area. For at least partial enclosing and separation, the separation section preferably has a cap shape, so that it extends radially overlapping the receiving area as much as possible on the axial side of the receiving area and extends axially overlapping at least a part of the receiving area radially outside the receiving area. In this respect, the separation section of the lubricant capture cap shields the receiving area axially at least partially in one direction and radially at least vertically downward.

[0008] In the state in which it is installed in the transmission housing, the lubricant collecting cap delimits a receiving space in the receiving region, in which a rotatable transmission element of a motor vehicle transmission with the transmission housing is placed. In contrast, in the installed position of the lubricant guiding cap, a lubricant reservoir of the motor vehicle transmission is arranged in the lubricant collecting region located vertically below, so that the lubricant collecting cap at least largely shields the receiving space from the lubricant reservoir in the installed state. As a result, the receiving space can be arranged next to the lubricant reservoir and vertically overlapping the lubricant reservoir, and despite this arrangement, a liquid level can be achieved on the lubricant reservoir side that would otherwise result in the rotatable transmission element located there being immersed too deeply in the receiving space.

[0009] Since, in the case of a higher liquid level in the lubricant reservoir, a lower liquid level of the lubricant in the receiving space is ensured by the shielding of the lubricant catch hood, stirring losses of the rotatable transmission element can be avoided. For this purpose, the hood-like separating section must enclose the receiving area at least at its boundary with the lubricant collecting area and thus separate the receiving area from the lubricant collecting area.

[0010] Preferably, the separating section is equipped with an axially extending through-hole, by means of which the receiving area is axially connected to an area which is located vertically above the lubricant collecting area in the installed position of the lubricant catching cap, in particular. Via the through-hole, a connection between a rotatable transmission element and other components of the motor vehicle transmission can be established in the motor vehicle transmission. Thus, a shaft for the rotationally fixed connection of the rotatable transmission element can be guided through the through-hole.

[0011] In particular, the separating section is also provided with at least one through-hole, through which each fastening point is designed for fastening the lubricant catching cap to the transmission housing.

[0012] In the sense of the invention, "axial" means an orientation parallel to an axis which coincides with the axis of rotation of a rotatable transmission element accommodated in the accommodation space. In the context of the invention, "radial" means an orientation in the direction of a diameter with a center point located on the axis.

[0013] In the sense of the invention, the lubricant catching cap is in particular designed in one piece, so that the sections of the lubricant catching cap are thus inseparably connected to one another. Alternatively or additionally, the lubricant catching cap is preferably made of a plastic material or a metal material.

[0014] The invention now includes the following technical teaching, namely that a suction section is also provided, which is designed to be located radially outside the separation section and at least partially in the lubricant collection area. The suction section has a suction connection and at least partially delimits a suction space, which is provided for supplying lubricant from a lubricant reservoir in the installed state of the lubricant capture hood and into which the suction connection opens. In other words, in the lubricant capture hood according to the invention, in addition to the separation section, a suction section is also defined, wherein the suction section is connected to the separation section radially outside and at least partially in the lubricant collection area. A suction connection is designed in the suction section, wherein the suction section also defines at least a part of the suction space, to which lubricant from the lubricant reservoir can be conveyed in the installed state of the lubricant capture hood. Here, the suction connection opens into the suction space, so that the lubricant located in the suction space can be discharged from the suction space through the suction connection.

[0015] This design of the lubricant capture cap has the advantage that the lubricant capture cap, in addition to the function of shielding the receiving area and at least the lubricant collecting area, also serves as a suction line, via which the lubricant from the lubricant reservoir can be sucked out. The respective delivery pump can thus also be arranged in a compact manner in the region of the lubricant capture cap, so that due to the functional integration of the suction line into the lubricant capture cap, a compact design of the lubricant supply system of the motor vehicle transmission and thus of the motor vehicle transmission itself can be achieved overall. Furthermore, due to the smaller number of components to be installed, the installation effort can also be reduced. Furthermore, the suction section of the lubricant capture cap according to the invention can be designed without problems in a suitable region, so that the lubricant can be sucked out at the optimal point.

[0016] The suction connection of the suction section is preferably designed for direct connection to a delivery pump, i.e. the delivery pump is connected to the suction connection with the suction side directly or only via a short line piece. Within the scope of the present invention, a suction net can also be integrated into the suction section, wherein the suction net can be specifically arranged at the suction connection on one side of the suction space.

[0017] In the sense of the invention, the suction section “at least partially” delimits the suction chamber, which means that the suction chamber is either completely defined by the suction section or is only delimited by the interaction of the suction section with at least one further component, preferably separate from the lubricant capturing bell.

[0018] The suction section thus preferably partially delimits the suction space and has an opening which is surrounded by a flange of the suction section. The flange of the suction section is used to fasten the cover in order to close the opening of the suction section and thus enclose the suction space between the suction section and the cover. Thus, on the one hand, the suction space can be largely delimited by the suction section of the lubricant capture hood, but on the other hand, the suction section can be manufactured in a simple manner due to the opening. Furthermore, an inlet for supplying the suction space from the lubricant reservoir can be defined on the cover or between the suction section and the cover.

[0019] Alternatively or additionally, a permanent magnet is arranged in the lubricant collecting area. Thus, by attracting the metal particles via the permanent magnet and holding them on the permanent magnet, these metal particles can be removed from the lubricant to be sucked from the lubricant reservoir into the suction chamber in an advantageous manner and in a reliable manner. This can also exclude blockages of other components in the lubricant supply system, such as, in particular, the delivery pump.

[0020] According to one possible embodiment of the invention, a collecting section is also provided, which at least partially delimits the collecting space. Here, at least one inlet is provided on the collecting section for supplying lubricant to the collecting space and / or at least one outlet is provided for discharging lubricant from the collecting space. This embodiment of the lubricant collecting cap according to the invention has the advantage that the lubricant collecting cap can also take over the additional function of the lubricant collecting area, from which the further distribution of the lubricant is carried out. In this case, one inlet and a plurality of outlets are particularly preferably provided on the collecting section.

[0021] Particularly preferably, the collecting section is arranged vertically above the bell-like separating section in the installed position of the lubricant catching bell and adjoins the separating section radially on the outside.

[0022] In a further development of the above-mentioned design possibilities, at least one through-hole is introduced into the collecting section, which through-hole is respectively designed as a hole, through which the lubricant can be respectively discharged from the collecting space. Thus, the at least one through-hole forms the function of a nozzle, through which the lubricant from the collecting space can be sprayed in a targeted manner into the area to be supplied. Thus, for example, a tooth meshing of a motor vehicle transmission can be supplied with lubricant.

[0023] As an alternative or supplement to the above-mentioned expansion scheme, the collecting section partially defines the collecting space and has an opening, which is surrounded by a flange of the collecting section. The flange of the collecting section is used here to fasten the cover in order to close the opening of the collecting section and thus define the collecting space between the collecting section and the cover. In an advantageous manner, the collecting space can thus be formed in a simple manner and method in manufacturing technology via the collecting section and a separate cover to be fastened thereto. Preferably, the inlet of the collecting space is defined at the opening of the collecting section, so that the cover to be fastened thereto is provided with at least one inlet connection. Particularly preferably, the cover here has exactly one inlet connection, which is especially designed as a connection point to the filter element.

[0024] As an alternative or supplement to the above-mentioned variant of the design possibility, at least one outlet is respectively configured as an outlet connection on the collecting section. The collecting section thus defines at least one outlet connection to which the respective line can be connected. It is particularly preferred that two outlet connections are designed by the collecting section.

[0025] In a further embodiment of the invention, the separating section is separated from the outer region, in which the lubricant collecting region is also located, by at least partially radially surrounding the receiving region with at least one hollow section. By implementing the separating section with at least one hollow section, it is possible to achieve at least a partial separation of the receiving region from the outer region and here at least a separation from the lubricant collecting region. Preferably, an axial separation of the receiving region from the outer region is also achieved at least partially by the at least one hollow section.

[0026] In an extension of the above-mentioned embodiment, the respective inner wall of at least one hollow section is interrupted in at least one region, in which a flow outlet is respectively configured. Here, each flow outlet extends radially outward tangentially to the respective inner wall and transitions into each pocket formed by at least one hollow section, which pocket is further connected to the outer region through each channel. This design has the following advantages, that is, when the rotatable transmission element accommodated in the receiving area rotates, the lubricant level in the receiving area can be kept low, because the lubricant moving together when the transmission element rotates is squeezed into each flow outlet, and from there it can escape into the outer region through each pocket and each channel. In this regard, a discharge channel is formed by each flow outlet, each pocket and each channel.

[0027] Preferably, in at least one hollow section, in the installed position of the lubricant capture hood, each outflow opening is designed vertically above the lubricant collecting area, thereby achieving a vertical height at which, on the one hand, an unproblematic outflow of lubricant from the receiving area to the external area can occur and, on the other hand, a backflow of lubricant from the external area to the receiving area is excluded.

[0028] Particularly preferably, two outflow openings are formed on at least one hollow section, which in the installed position of the lubricant catching cap are each arranged vertically substantially at the same height above the lubricant collecting area and are spaced apart from one another in the circumferential direction. Thus, even when rotatable transmission elements that can be accommodated in the receiving area can each rotate in opposite directions of rotation, a reliable escape of lubricant from the receiving area can be provided. Lubricant can be discharged through the outflow openings in each direction of rotation.

[0029] As an alternative or supplement to the above-mentioned expansion, at least one hollow section has at least one notch in the vertically upper region in the installed position of the lubricant guide cap, through which the connection of the outer region to the receiving region is established. In an advantageous manner, a targeted delivery of lubricant from the outer region to the receiving region can be carried out through the at least one notch, so that the lubricant supply to the rotatable transmission element placed in the receiving region can also take place. The at least one notch is especially designed as a radially extending hole, which forms an eyelet for the respective delivery of lubricant. In particular, each opening of the at least one notch forms a basin-shaped depression on the outer region side by the at least one hollow section. This promotes the accumulation of lubricant in the region of each opening.

[0030] In particular, the above-mentioned variants of the above-mentioned embodiments are jointly realized, wherein the separation section has a first hollow section, which is connected to a second hollow section via an intermediate section extending radially inward, wherein the first hollow section is respectively provided with an outflow opening, and at least one notch is designed on the second hollow section. As a result, the following structure of the separation section can be realized, in which the radial separation and axial separation of the receiving area and at least the lubricant collecting area are reliably designed. It is particularly preferred that the first hollow section has a substantially axially variable direction, and the second hollow section consists of a first part having a substantially axially variable direction and a second part having an axially and radially variable direction. The second part of the second hollow section is preferably designed to be conical.

[0031] In a further development of the invention, at least one line section is also provided, each of which has two connection points. The lubricant catching cap according to the invention can thus advantageously also form part of the line volume of a lubricant supply system of a motor vehicle transmission, thereby making it possible on the one hand to achieve a compact arrangement and on the other hand to save on separate channels and / or pipes.

[0032] A lubricant catching cap implemented according to one or more of the above-mentioned variants is in particular part of a transmission housing of a motor vehicle transmission. The lubricant catching cap delimits a receiving space which is separated from the lubricant reservoir by the lubricant catching cap. Furthermore, the delivery pump is connected with its intake side to an intake connection of the suction section of the lubricant catching cap. As a result, a compact design can be achieved in the motor vehicle transmission and the installation effort can be reduced.

[0033] Particularly preferably, the delivery pump is then connected on the pressure side via a line section of the lubricant catching cap to a radiator and / or a filter element, wherein a connection is then established in particular to a collecting section of the lubricant catching cap, from which the further distribution of the lubricant to the areas to be supplied is carried out. In particular, in a motor vehicle transmission, the electric machine is integrated into the transmission housing, wherein here, also starting from the collecting section, the delivery of lubricant for rotor cooling and / or stator cooling of the electric machine is also carried out. In addition, the lubricant is respectively injected in a targeted manner into the areas to be supplied through the through-holes of the collecting section. The lubricant that flows out again after being delivered for rotor cooling and / or stator cooling is preferably guided into the receiving area through at least one notch in the separating section and thus to the rotatable transmission element located there.

[0034] In particular, a differential wheel set of a motor vehicle transmission is accommodated in a receiving space which is delimited by a lubricant catching bell. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings show advantageous embodiments of the invention which are explained below. In them:

[0036] Figure 1 A perspective view showing a portion of a motor vehicle transmission having a lubricant capture cap according to a preferred embodiment of the present invention;

[0037] Figure 2 Shows Figure 1 A perspective view of a lubricant capture hood;

[0038] Figure 3 Shows Figure 1 A view of a lubricant supply system for a vehicle transmission;

[0039] Figure 4 Shown according to Figure 1 and Figure 2 Another view of the lubricant capture hood;

[0040] Figure 5 Shows Figure 1 A cross-sectional view of a transmission device of a motor vehicle;

[0041] Figure 6Shown according to Figure 1 , 2 and 4 , an isolated view of the collection section of the lubricant capture hood; and

[0042] Figures 7 to 9 Shows Figure 1 Another sectional view of a motor vehicle transmission. DETAILED DESCRIPTION

[0043] Figure 1 A perspective view of a portion of a motor vehicle transmission 1 is shown, wherein the motor vehicle transmission 1 is shown here in the region of a differential gear set 2 and in a transmission housing 3, which is only partially shown. In addition to an outer housing part 4 and a housing part 5 accommodated therein, the transmission housing 3 also has a lubricant catchment bell 6, which is designed here according to a preferred embodiment of the invention.

[0044] The lubricant catching cap 6 is fastened to the rest of the transmission housing 3 via a screw connection 7 and comprises a cap-like separating section 8, by means of which the lubricant catching cap 6 separates a receiving space 9 from a further interior region 10 of the transmission housing 3 and a lubricant reservoir 11 arranged therein. The separation of the receiving space 9 from the lubricant reservoir 11 prevents a lubricant level in the receiving space 9 that corresponds to the lubricant reservoir 11, which would otherwise result in higher churning losses of the differential gear set 2.

[0045] Figure 2 A perspective individual view of the lubricant catching cap 6 is shown. As can be seen here, the separating section 8 comprises a first hollow section 12 which is designed as a hollow cylinder and has a recess 13 in the vertically upper region in the installed position of the lubricant catching cap 6. Figure 1 As can be seen from the perspective view, in the installed state of the lubricant capture cover 6, the pinion 14 meshes with the drive gear 15 through the recess 13, and the drive gear is connected to the differential cage 16 in a rotationally fixed manner within the differential gear set 2 and is accommodated in the accommodating space 9 together with the rest of the differential gear set 2.

[0046] Due to its hollow cylindrical shape, the first hollow section 12 of the separation section 8 has a course that is essentially variable only in the axial direction, wherein the middle section 17 in the separation section 8 is connected to the first hollow section 12, which middle section extends radially inwards from the first hollow section 12 and has a course that is essentially variable only in the radial direction. Here, the middle section 17 connects the first hollow section 12 to the second hollow section 18 consisting of a first part 19 and a second part 20. Here, the connection to the middle section 17 is established at the first part 19 of the second hollow section 18, wherein the first part 19 has a course that is essentially variable in the axial direction and is therefore designed as hollow cylindrical as possible. In contrast, in the second part 20 of the hollow section 18, the course changes in the axial direction and in the radial direction, whereby the second part 30 has a conical shape.

[0047] At the end, a through-opening 21 is defined by the second part 20 of the hollow section 18, through which a shaft 22 for rotationally fixed connection with the differential gear set 2 in the motor vehicle transmission 1 is guided through the lubricant catch cap 6 (see Figure 1 ). In order to increase the rigidity of the lubricant capture cap 6, the hollow section 18 is further connected to the middle section 17 via a reinforcing rib 23. In addition, the hollow section 18 has a flange 24, which is provided with a through hole 25. The through hole 25 is used here to allow the screw connection 7 to pass through.

[0048] The hollow sections 12 and 18 and the middle section 17 give the separating section 8 its essentially hood-like shape, by which, in the lubricant catching hood 6, the receiving area 26 is also separated from the outer area 27 and the associated lubricant collecting area 28, in which the receiving space 9 is defined in the installed state of the lubricant catching hood 6. In this case, in the installed state of the lubricant catching hood 6, the further inner area 10 is realized in the outer area 27 and the lubricant reservoir 11 is realized in the lubricant collecting area 28.

[0049] In addition to separating the receiving space 9 from the further interior area 10 and in particular the lubricant reservoir 11, the lubricant catch cap 6 is also part of a lubricant supply system 29 of the motor vehicle transmission 1, wherein the lubricant supply system 29 is Figure 3 Thus, the lubricant collecting hood 6 forms a suction point for the lubricant supply system 29 in that the lubricant collecting hood 6 is equipped with a suction section 30 in addition to the separation section 8, which is respectively provided in particular at the lubricant collecting hood 6 in the Figure 4 In another view in FIG. 1 , and also in the motor vehicle transmission 1 , it can be seen that Figure 5Here, the suction section 30 is designed vertically downward outside the separation section 8 in the installed position of the lubricant capture cap 6 and, together with the cover 31 fastened to the suction section 30, delimits a suction space 32, which is particularly Figure 5 In this case, in the lubricant catching cap 6 , the suction section 30 is located at least partially in the lubricant collecting area 28 and therefore also at least partially in the lubricant reservoir 11 in the installed state of the lubricant catching cap 6 .

[0050] The cover 31 is fastened to the flange 33 on the suction section 30 and closes the opening 34 of the suction section 30 in the fastened state, whereby the suction section 30 and the cover enclose a suction space 32 therebetween. A suction opening 35 is also designed at the cover 31, such as Figure 5 As shown, lubricant from the lubricant reservoir 11 can flow through the suction opening into the suction chamber 32. The suction section 30 also forms a suction connection 36, to which a delivery pump 37 is connected with its suction side in the lubricant supply system 29.

[0051] As in Figure 3 As can be seen in FIG. 2 , the pressure side of the delivery pump 37 is then connected in the lubricant supply system 29 via a connecting line 38 to a line section 39, which is also designed outside the separation section 8 via a lubricant capture cap 6 and has two connection points 40 and 41. When the connection to the connection line 38 is established at the connection point 40, the connection point 41 is connected to a radiator 42, in which the lubricant delivered via the delivery pump 37 can exchange heat with another medium, in particular cooling water. The radiator 42 is then connected to a filter element 43, in which particles can be separated from the lubricant.

[0052] After the filter element 43, distribution to the different areas to be supplied with lubricant is carried out, wherein this function is also realized by the lubricant capture hood 6. For this purpose, the lubricant capture hood 6 is equipped with a collecting section 44, which is arranged vertically above the outside of the separation section 8 in the installed position of the lubricant capture hood 6. The collecting section 44, together with the cover 45 fastened thereto, delimits a collecting space 46 in which the lubricant is collected after being filtered through the filter element 43 and is then distributed from the collecting space to the areas to be supplied. The collecting space 46 can be formed in particular in the collecting section 44 at Figure 6 Here, the cover 45 forms an inlet 47 leading to the collection space 46, in that the cover 45 has a connection opening for the filter element 43. A flange 48 is also designed on one side of the collection section 44, and the cover 45 is fastened to the flange 48 to close the opening 49 of the collection section 44 surrounded by the flange 48, thereby defining the collection space 46.

[0053] As in Figure 2 and Figure 6 As can be seen in each of the figures, the collecting section 44 forms two outlets 50 and 51 (in the form of outlet connections 52 and 53, respectively). At the outlet connection 52, a connection with the motor vehicle transmission 1 is established in the lubricant supply system 29 (at Figure 3 The stator cooling device of the motor 54 (only shown in the figure) is connected, while the discharge connection 53 is connected to the rotor cooling device of the motor 54.

[0054] Furthermore, a plurality of through holes 55 and 56 are introduced into the collecting section 44, the through holes being Figure 6 Here, the nozzle is realized by the through-holes 55 and 56, and after a certain pressure is reached in the collecting space 46, the lubricant is sprayed in the direction of the through-holes 55, 56 respectively. Figure 2 and Figure 4 In addition, on the one hand, the motor vehicle transmission 1 is used Figure 7 It can be seen from another sectional view in that lubricant is sprayed through the through hole 55 into the area of ​​the tooth meshing of the pinion 14 and the drive gear 15 for lubricating the tooth meshing. Figure 8 It is shown that a further toothing 57 of the motor vehicle transmission 1 is supplied with lubricant via a through-opening 56 .

[0055] In order to prevent excessive accumulation of lubricant in the receiving area 26 and thus in the receiving space 9 in addition to separating the lubricant, pockets 57 and 58 are also provided in the hollow section 12 of the separating section 8, which pockets are respectively provided at substantially the same height above the vertical center of the separating section 8 and are respectively connected to the outer area 27 of the lubricant catching cap 6 and thus also to the other inner area 10 via a channel 59 or 60. This can be seen in particular from Figure 2 and Figure 5 See. Each pocket 57 or 58 is connected to the receiving area 26 via an outflow opening 61 or 62, respectively, the inner wall 63 of the hollow section 12 is interrupted by an outflow opening, and the outflow opening transitions tangentially to the inner wall 63 radially outward into the respective pocket 57 or 58. Here, during the rotational movement of the drive gear 15, depending on the direction of rotation, the lubricant is respectively conveyed into the outflow openings 61 and 62 and thus into the respectively associated pocket 57 or 58, and the lubricant conveyed here can then flow out from the pocket through the respective channel 59 or 60. As a result, the receiving space 9 is emptied during the rotational movement of the differential gear set 2 and the drive gear 15.

[0056] In addition, however, lubricant is also conveyed to the receiving space 9 via the lubricant catch cap 6 in order to ensure adequate lubrication of the differential wheel set 2. For this purpose, a recess 64 is provided in the vertically upper region of the hollow section 18, which is designed as a through hole and in particular in the Figure 2 The lubricant can be guided into the receiving space 9 through the notch 64 and then flows out after being delivered to the rotor 65 of the motor 54. Fig. 9 In order to achieve the accumulation of lubricant in the region of the notch 64, a cup-shaped depression 66 is formed in the region of the notch 66, which is next to the middle section 17 and is designed on the outside of the hollow section 18 by reinforcing ribs 23 on both sides of the notch 64 and also by web-shaped bulges 67.

[0057] Finally, a permanent magnet 68 is also arranged on the lubricant catching cap 6, which is arranged in the region of the suction section 30 and is therefore located in the lubricant reservoir 11 when the lubricant catching cap 6 is installed. The permanent magnet 68 is provided here to attract and thus separate metal particles from the lubricant.

[0058] The embodiment of the lubricant catching bell according to the invention can, in addition to the partial separation of the receiving area from the lubricant collecting area, also provide for further functions within the lubricant supply system of a motor vehicle transmission.

[0059] Reference numerals list

[0060] 1 Motor vehicle transmission

[0061] 2 Differential wheels

[0062] 3 Transmission housing

[0063] 4 Shell part

[0064] 5 Shell part

[0065] 6 Lubricant capture hood

[0066] 7 Screw-on

[0067] 8 Separation section

[0068] 9 Accommodation space

[0069] 10 Internal Area

[0070] 11 Lubricant reservoir

[0071] 12 Hollow Section

[0072] 13 Blank space

[0073] 14 Small gear

[0074] 15 Drive gear

[0075] 16 Differential cage

[0076] 17 Middle section

[0077] 18 Hollow Section

[0078] 19 parts

[0079] 20 parts

[0080] 21 Through Holes

[0081] 22 Axis

[0082] 23 Reinforcement ribs

[0083] 24 Flange

[0084] 25 Through Holes

[0085] 26 Accommodation Area

[0086] 27 External Area

[0087] 28 Lubricant collection area

[0088] 29 Lubricant supply system

[0089] 30 Suction section

[0090] 31 Cover

[0091] 32 Suction space

[0092] 33 Flange

[0093] 34 Opening

[0094] 35 Suction opening

[0095] 36 Suction connector

[0096] 37 Delivery Pump

[0097] 38 Connection lines

[0098] 39 Line Section

[0099] 40 Connection parts

[0100] 41 Connection parts

[0101] 42 Radiator

[0102] 43 Filter element

[0103] 44 Collection Segment

[0104] 45 Cover

[0105] 46 Collection Space

[0106] 47 Entrance

[0107] 48 Flange

[0108] 49 Opening

[0109] 50 Exit

[0110] 51 Exit

[0111] 52 Discharge connector

[0112] 53 Discharge connector

[0113] 54 Motor

[0114] 55 Through hole

[0115] 56 Through Holes

[0116] 57 pocket

[0117] 58 pocket

[0118] 59 channels

[0119] 60 channels

[0120] 61 Outlet

[0121] 62 Outlet

[0122] 63 Inner wall

[0123] 64 Gap

[0124] 65 Rotor

[0125] 66 Depression

[0126] 67 ridge

[0127] 68 permanent magnets

Claims

1. A lubricant catching hood (6) for a transmission housing (3) of a motor vehicle transmission (1), the lubricant catching hood comprising a hood-like separating section (8), the separating section at least partially enclosing a receiving area (26) and thereby being separated at least from a lubricant collecting area (28), wherein in the installed state of the lubricant catching hood (6) in the transmission housing (3), a receiving space (9) for a rotatable transmission element of the motor vehicle transmission (1) is defined in the receiving area, the lubricant collecting area being arranged in the installed position of the lubricant catching hood (6) in the vertically lower area of ​​the lubricant catching hood (6), and in the installed state of the lubricant catching hood (6) in the transmission housing (3), a lubricant reservoir (11) of the motor vehicle transmission (1) is provided in the lubricant collecting area, characterized in that Furthermore, a suction section (30) is provided, which is designed to be located radially outside the separation section (8) and is at least partially located in the lubricant collecting area (28), the suction section (30) having a suction connection (36) and at least partially delimiting a suction space (32), which is provided for supplying lubricant from the lubricant reservoir (11) when the lubricant capture cap (6) is installed, and the suction connection (36) opens into the suction space.

2. The lubricant capture hood (6) according to claim 1, characterized in that The suction section (30) partially delimits the suction space (32) and has an opening (34), which is surrounded by a flange (33) of the suction section (30), wherein the flange (33) of the suction section (30) is used to fasten a cover (31) in order to close the opening (34) of the suction section (30) and thus enclose the suction space (32) between the suction section (30) and the cover (31).

3. The lubricant capture hood (6) according to claim 1 or 2, characterized in that: A permanent magnet (68) is arranged in the lubricant collecting area (28).

4. The lubricant capture cap (6) according to any one of claims 1 to 3, characterized in that Furthermore, a collecting section (44) is provided, which at least partially defines a collecting space (46), wherein at least one inlet (47) for supplying lubricant to the collecting space (46) and / or at least one outlet (50, 51) for discharging lubricant from the collecting space (46) are provided on the collecting section (44).

5. The lubricant capture hood (6) according to claim 4, characterized in that At least one through-opening (55, 56) is introduced into the collecting section (44), the through-openings being each designed as a bore and through which the lubricant can be discharged from the collecting space (46).

6. The lubricant capture hood (6) according to claim 4 or 5, characterized in that The collecting section (44) partially defines the collecting space (46) and has an opening (49), which is surrounded by a flange (48) of the collecting section (44), wherein the flange (48) of the collecting section (44) is used to fasten the cover (45) so as to close the opening (49) of the collecting section (44) and thereby define the collecting space (46) between the collecting section (44) and the cover (45).

7. The lubricant capture cap (6) according to any one of claims 4 to 6, characterized in that At least one outlet (50, 51) is respectively configured as an outlet connection (52, 53) on the collecting section (44).

8. Lubricant capture cap (6) according to any one of the preceding claims, characterized in that The separating section (8) is separated from an outer region (27) in which the lubricant collecting region (28) is also located by at least partially radially surrounding the receiving region (26) with at least one hollow section (12, 18).

9. The lubricant capture hood (6) according to claim 8, characterized in that The respective inner wall (63) of at least one hollow section (12) is interrupted in at least one region, in which an outflow opening (61, 62) is respectively constructed, wherein each outflow opening (61, 62) extends radially outwardly tangentially to the respective inner wall (63) and transitions into each pocket (57, 58) formed by the at least one hollow section (12), the pockets furthermore being connected to the outer region (27) via each channel (59, 60).

10. The lubricant capture hood (6) according to claim 8 or 9, characterized in that The at least one hollow section (18) has at least one recess (64) in the vertically upper region in the installed position of the lubricant guiding cap (6), via which a connection between the outer region (27) and the receiving region (26) is respectively established.

11. The lubricant capture hood (6) according to claim 10, characterized in that At each opening of the at least one recess (64) on the side of the outer region (27), a cup-shaped depression (66) is formed by the at least one hollow section (18).

12. The lubricant capture cap (6) according to claims 8 to 11, characterized in that The separation section (8) comprises a first hollow section (12), which is connected to a second hollow section (18) via a middle section (17) extending radially inwards, wherein the first hollow section (12) is provided with outflow openings (61, 62) respectively, and the at least one notch (64) is designed on the second hollow section (18).

13. The lubricant capture cap (6) according to any one of the preceding claims, characterized in that Furthermore, at least one line section (39) is provided, each of which has two connection points (40, 41).

14. Motor vehicle transmission (1), comprising a transmission housing (3) having a lubricant capture cap (6) according to any one or more of claims 1 to 13, wherein: The lubricant catching cap (6) delimits a receiving space (9) which is separated from a lubricant reservoir (11) via the lubricant catching cap (6), and wherein a delivery pump (37) is connected with its intake side to an intake connection (36) of a suction section (30) of the lubricant catching cap (6).

15. The motor vehicle transmission (1) according to claim 14, characterized in that A differential wheel set (2) is accommodated in the accommodation space (9).

Images