Lockable differential mechanism

Abstract

The invention relates to a differential gear (1) for transmitting torque to an axle (2) of a motor vehicle (3), comprising at least a differential housing (4) and two driven shafts (5, 6) having a common axis of rotation (7) and a disc clutch (8) having at least one inner disc (9) and at least one outer disc (10) for switchably connecting the first driven shaft (5) to the differential housing (4).

Description

Technical Field

[0001] This invention relates to a lockable differential transmission mechanism for transmitting torque to the axles of a motor vehicle. Background Technology

[0002] Torque is typically transmitted from the drive unit to two driven shafts via an input shaft (e.g., via a longitudinal shaft) through a differential transmission mechanism. Within the differential transmission mechanism, the introduced torque is transmitted from the differential housing to gears rotatably arranged within the housing and interconnected via teeth. These gears are connected to the driven shafts. At least one driven shaft can be connected to the differential housing via a clutch. On the one hand, the different speeds of the wheels connected to the driven shafts can be balanced via the differential transmission mechanism. On the other hand, torque can be distributed to the wheels (if possible, differently) via the clutch.

[0003] With the clutch disengaged, the two wheels are driven by the differential with the same torque, even if they rotate at different speeds (such as when cornering). When rotating at the same speed, the wheels connected to the driven shaft of the differential do not experience power loss or wear because they are not moving relative to each other. If one wheel comes to a complete stop, the other wheel will rotate at twice the speed of the differential housing when the clutch is disengaged. This can occur, for example, during starting, when one of the two wheels loses static friction with the ground, such as when starting on mud, snow, or similar surfaces. That wheel then "slips" and the two wheels no longer transmit forward driving torque. In a fast-moving curve, the wheel inside the curve can also be unloaded to such an extent that it slips.

[0004] A lockable differential prevents this by either eliminating balancing action (full lock) through a rigid connection between the two driven shafts or reducing balancing action through friction set via the clutch. In the latter case, a portion of the power is output to the drive wheels, while the remainder is converted into heat in the differential or clutch. When locked (full lock), the wheels rotate at the same speed, and torque is distributed to each wheel according to ground adhesion. If full lock is used on a road or other "good" surface, the powertrain will become strained and damaged because the different travel lengths of the wheels in corners can only be received by tire slippage.

[0005] A differential transmission mechanism with a switchable clutch is known from US5,098,360.

[0006] A differential transmission mechanism having a disc clutch and a claw clutch is known from US2020 / 0292045A1. The disc clutch can be operated via an operating device having a ramp. The bevel gear connected to the driven shaft is constructed as an internal disc support. The helical gear is supported on the driven shaft in the radial direction.

[0007] There is a persistent need to improve the components of motor vehicles. In particular, these components should be lighter and more compact, and, where possible, cost-effective in terms of manufacturing. At the same time, a long service life should be achieved even in compact implementations. Summary of the Invention

[0008] The objective of this invention is to at least partially address the problems listed in the prior art. In particular, a differential transmission mechanism with further reduced weight and structural dimensions is proposed.

[0009] A differential transmission mechanism having the features described in claim 1 helps to solve the aforementioned task. The subject matter of the dependent claims represents advantageous improvements. The features individually listed in the claims can be combined with each other in a technically meaningful manner and can be supplemented by explanatory facts from the specification and / or details from the figures, wherein further embodiments of the invention are shown.

[0010] A lockable differential transmission mechanism for transmitting torque to the axles of a motor vehicle is proposed. The differential transmission mechanism includes at least a differential housing and two driven shafts having a common axis of rotation, and a disc clutch having at least one inner disc and at least one outer disc for switchably connecting a first driven shaft to the differential housing. The first driven shaft extends along the axis of rotation and is connected via a first outer circumferential surface of the first driven shaft and an inner circumferential surface of a bevel gear, which at least mates with the bevel gear's configuration shape in the circumferential direction. A section of the second outer circumferential surface of the bevel gear is implemented as an inner disc support, and the differential housing is implemented as an outer disc support. The bevel gear is supported at least radially relative to the contact surface of the differential housing.

[0011] Referring to the description of known differential transmission mechanisms disclosed at the beginning, bevel gears are typically arranged on the driven shaft and supported radially via the driven shaft and then via (rolling) supports of the driven shaft, for example, supported at the housing or other components of the differential transmission mechanism. If such support is not feasible from a structural design perspective, the bevel gears and the driven shaft must be supported radially at other locations.

[0012] The differential transmission mechanism described herein is characterized in particular by the special support of the bevel gear at the differential housing. For this purpose, a contact surface is provided, through which the bevel gear is supported at the differential housing, at least radially.

[0013] The support can be provided via a specific embodiment of the contact surface or a support element that contacts the contact surface. The support element can, for example, be arranged between the bevel gear and the differential housing, providing support relative to the radial direction. The bevel gear thus contacts the contact surface or support element at the differential housing via a mating surface. The support element contacts the contact surface at the differential housing via a mating surface. The support element can also have an (additional) contact surface constructed relative to the bevel gear.

[0014] The contact via the contact surface (located at the differential housing and / or at the support element) specifically enables a (at least substantially) frictionless rotatable connection between the differential housing and the bevel gear relative to the circumferential direction. This allows for the most wear-free possible rotation of the bevel gear relative to the differential housing during operation of the differential transmission.

[0015] Support between the differential housing and the bevel gear is provided, in particular, via the contact of cylindrical surfaces that are rotatably connected to each other and provide support relative to the radial direction. The cylindrical surfaces extend, in particular, parallel to the axis of rotation. The cylindrical surfaces are provided, at least at the bevel gear and the differential housing, and, where possible, additionally at additional support elements.

[0016] The contact surfaces at the differential housing and / or support elements are designed (fatigue-resistant) for support relative to the radial direction during operation of the differential transmission, particularly for surface pressure of at least 100 N / mm², preferably at least 150 N / mm².

[0017] The contact surfaces at the differential housing and / or at the support elements, and / or at the bevel gears or on the support elements, which are in contact with the corresponding contact surfaces, can be implemented, for example, by a sliding cladding. For example, the support element can be implemented as a sliding ring. The contact surfaces and / or the corresponding mating surfaces can thus be constructed by a cladding with special sliding properties.

[0018] The contact surfaces and mating surfaces at the differential housing, bevel gear, and, where possible, the support elements, especially relative to at least one component of the differential housing and bevel gear, preferably relative to both components, form a rotatable connection structure relative to the circumferential direction. Thus, the bevel gear can rotate relative to the differential housing in any case. Where possible, the support elements can rotate relative to the bevel gear and / or relative to the differential housing.

[0019] In particular, the support element is arranged in a torsional manner at the differential housing via an interference fit. Therefore, relative rotation of the support element relative to the differential housing is especially infeasible. Consequently, relative rotation occurs between the contact surface at the support element and the mating surface at the bevel gear.

[0020] Alternatively, the support element may be implemented as a multi-piece component, such as a rolling bearing.

[0021] In particular, disc clutches have multiple outer discs and multiple inner discs. However, the clutch can also be implemented as a friction clutch, which has a pressure plate, a clutch disc, and a mating plate, wherein the pressure plate and mating plate are torsionally connected, for example (as inner discs) to a bevel gear or (as outer discs) to a differential housing. The pressure plate is movably arranged axially, with the clutch disc arranged between the pressure plate and the mating plate. The clutch is not fixed to a particular implementation. However, it is preferable to achieve the partial transmission of torque from the drive shaft to the driven shaft via the clutch. The following description applies not only to disc clutches but also to other (friction) clutches in the same manner.

[0022] In particular, the disc clutch can be operated via a (known) actuation device. The actuation device can be associated with a differential transmission mechanism. The discs can be moved along the axis of rotation via the actuation device and form an adjustable frictional engagement connection with each other.

[0023] For example, EP0414086A2 discloses an operating device with two expansion discs supported axially by balls. Since the balls are arranged on an inclined plane, rotation of the expansion discs relative to each other in the circumferential direction causes a change in their axial position. Both expansion discs are arranged on a first driven shaft, wherein the operating force is received on one side by a disc fixed axially on the first driven shaft and on the other side by a differential housing.

[0024] Driven shafts extend toward the differential housing and are connected therein in a form-fitting manner with each of a bevel gear, at least in the circumferential direction. The driven shafts are arranged coaxially with each other, so that the differential housing and the driven shafts have a common axis of rotation.

[0025] The bevel gear is rotatably arranged in the differential housing together with the driven shaft. Inside the differential housing, the driven shaft or its bevel gear is interconnected via other gears.

[0026] The first driven shaft extends along the axis of rotation and is connected to the bevel gear via a form-fitting structure, at least circumferentially, through a bevel tooth portion, via a first outer circumferential surface of the first driven shaft and an inner circumferential surface of the bevel gear. A section of the second outer circumferential surface of the bevel gear is implemented as an inner disc support, and the differential housing is implemented as an outer disc support. At least one inner disc is form-fitted to the inner disc support relative to the circumferential direction. At least one outer disc is form-fitted to the outer disc support relative to the circumferential direction. The inner and outer discs are arranged alternately along an axial direction (which extends along the axis of rotation). By shifting the discs along the axial direction, a friction-fitting connection structure can be constructed between the discs, thereby allowing the first driven shaft to be adjustably connected to the differential housing.

[0027] In particular, the contact surface is arranged along the axis of rotation between the bevel teeth of the bevel gear and the section thereon.

[0028] Specifically, the bevel gear is supported at the contact surface by a support element. Here, the disc is supported on the differential housing by the support element relative to the axial direction extending along the rotation axis. In particular, the surfaces of the support element and the differential housing that contact and provide support relative to the axial direction are configured such that frictionless and wear-free rotation between these surfaces in the circumferential direction is possible. Alternatively, however, the support element can also be designed to rotate (almost) only relative to the bevel gear. In particular, the support element is thus arranged on the differential housing by an interference fit and is therefore torsionally connected to the differential housing. The bevel gear is then rotatably arranged relative to the support element.

[0029] In particular, the bevel gear is supported at the contact surface of the differential housing by a support element. Here, the bevel gear is supported at the support element (or at the contact surface of the support element) with respect to the radial direction by a support surface (mating surface) formed as a column on the second outer circumference of the bevel gear.

[0030] In particular, the section of the bevel gear (constructed as an inner disc support) is arranged along the axis of rotation between the bevel teeth and the contact surface. Specifically, the operating device operates the disc through the support element. For this purpose, for example, an opening extending in the axial direction can be provided in the support element, through which the operating element of the operating device extends.

[0031] In particular, the contact surfaces of the differential housing and / or support elements are configured as columnar.

[0032] In particular, the contact surface of the differential housing is arranged radially outside the largest radial extension of the bevel gear. Therefore, the bevel gear can be pushed into the differential housing axially for assembly of the differential transmission mechanism.

[0033] Specifically, the first outer and inner circumferential surfaces of the bevel gear form an overlapping region along the axis of rotation. This overlapping region has two adjacent segments arranged along the axis of rotation. In the first overlapping region segment, at least one channel is formed in the bevel gear, extending from the inner circumferential surface into a segment of the second outer circumferential surface. In particular, multiple channels are arranged in the first overlapping region segment, staggered from each other along the axial direction and / or along the circumferential direction.

[0034] The at least one channel is specifically used for supplying fluid toward the clutch. The fluid is used, in particular, to cool the clutch.

[0035] In particular, the form-fitting connection structure between the driven shaft and the bevel gear, for example, the bevel gear portion, is only arranged in the second overlapping area section.

[0036] In particular, the first overlapping region segment has a larger diameter than the second overlapping region segment.

[0037] In particular, the first overlapping region is used to guide fluid along the first driven shaft toward the at least one channel. This requires a clearance between the driven shaft and the inner circumferential surface of the bevel gear. However, this clearance reduces the area required to support the bevel gear relative to the radial direction. Specifically, as compensation for losses in this support in the region of the first overlapping region, a support is provided at the contact surface of the differential housing.

[0038] In particular, of the driven shafts, only the first driven shaft can be connected to the differential housing via a clutch. Furthermore, the second driven shaft and the bevel gear connected to it are arranged in the differential housing without a clutch, i.e., without a clutch. Therefore, the second driven shaft is not lockable relative to the differential housing itself.

[0039] Specifically, the differential transmission mechanism therefore has two driven shafts, of which only one driven shaft can be connected to the differential housing via a clutch in a torque-transmitting manner. The differential transmission mechanism therefore has only one clutch, wherein the two driven shafts are interconnected via a bevel gear differential transmission mechanism. The differential housing forms a drive shaft through which the differential transmission mechanism is connected to the drive unit.

[0040] Furthermore, a drive assembly for a motor vehicle is proposed, comprising at least a drive unit and a differential housing as described. The differential housing is configured to transmit torque from the drive unit to the two wheels of the axle, wherein the torque of the drive unit can be introduced into the differential transmission mechanism via the differential housing and further guided to one wheel via each driven axle.

[0041] In particular, the differential housing of the differential transmission mechanism is implemented as a drive shaft, through which the differential transmission mechanism can be connected to or connected to the drive unit.

[0042] The same principles applied to differential transmission mechanisms also apply to drive components, and vice versa.

[0043] In addition, a motor vehicle is proposed, which has at least the drive components described above and a plurality of wheels, wherein the differential transmission mechanism is preferably arranged at the rear axle of the motor vehicle.

[0044] The use of indefinite articles (“a” and “an”), especially in the claims and the description describing the claims, should be understood as such indefinite articles, rather than numerals. Accordingly, the terms or components that arise from this should therefore be understood as existing at least once, and especially but may also exist multiple times.

[0045] It should be noted beforehand that the numerals used herein (“first,” “second,” etc.) are primarily (only) used to distinguish multiple objects, parameters, or processes of the same kind, i.e., in particular, they do not presuppose any correlation or / or order between these objects, parameters, or processes. If correlation and / or order are required, they are explicitly stated herein or will become apparent to those skilled in the art when examining the specifically described design. Where components may exist in multiples (“at least one”), the description of one of these components may equally apply to all or some of the components in the plurality of said components, but this is not mandatory. Attached Figure Description

[0046] The invention and technical background will be explained in more detail below with reference to the accompanying drawings. It should be noted that the invention should not be limited to the listed embodiments. In particular, unless explicitly stated otherwise, aspects of the facts illustrated in the figures can be extracted and combined with other components and understandings of this specification. It should be particularly noted that these figures and, in particular, the scale shown are merely illustrative. Wherein:

[0047] Figure 1 A motor vehicle is shown, having a drive assembly and a differential transmission mechanism shown in section in the side view;

[0048] Figure 2 Using perspective to illustrate the basis of the exploded diagram Figure 1 A portion of the differential transmission mechanism 1; and

[0049] Figure 3 A motor vehicle with drive components is shown in a top view. Detailed Implementation

[0050] Figure 1A motor vehicle 3 is shown, having a drive assembly 31 and a differential transmission mechanism 1 shown in cross section in the side view. Figure 2 Using perspective to illustrate the basis of the exploded diagram Figure 1 It is part of the differential transmission mechanism 1. Figures 1 to 3 They will be described together in the following text.

[0051] The motor vehicle 3 has a drive assembly 31 and multiple wheels 33. The drive assembly 31 includes a drive unit 32 and a differential transmission mechanism 1. The differential transmission mechanism 1 is configured to transmit torque from the drive unit 32 to the two wheels 33 of the axle 2. The torque of the drive unit 32 can be introduced into the differential transmission mechanism 1 via the drive shaft 34 and via the differential housing 4, and can be further guided to each wheel 33 via each driven shaft 5, 6. The differential transmission mechanism 1 is located at the rear axle 2 of the motor vehicle 3.

[0052] The differential transmission mechanism 1 has two driven shafts 5 and 6, wherein only the first driven shaft 5 can be connected to the differential housing 4 via a disc clutch 8 in a torque-transmitting manner. The differential transmission mechanism 1 thus has only one disc clutch 8, wherein the two driven shafts 5 and 6 are interconnected via a bevel gear differential transmission mechanism 1. The differential housing 4 forms or is connected to a drive shaft 34, through which the differential transmission mechanism 1 is connected to the drive unit 32.

[0053] The differential transmission mechanism 1 includes a differential housing 4, two driven shafts 5 and 6 sharing a common axis of rotation 7, and a disc clutch 8 having multiple inner discs 9 and multiple outer discs 10. The disc clutch is used to switchably connect the first driven shaft 5 to the differential housing 4. The first driven shaft 5 extends along the axis of rotation 7 and, via a first outer peripheral surface 11 of the first driven shaft 5 and an inner peripheral surface 12 of the bevel gear 13, forms a form-fitting connection structure 15 with the bevel gear 13 at least relative to the circumferential direction 14. A section 16 of the second outer peripheral surface 17 of the bevel gear 13 is implemented as an inner disc support 18, and the differential housing 4 is implemented as an outer disc support 19. The bevel gear 13 is supported at least relative to the radial direction 21 at a contact surface 20 of the differential housing 4.

[0054] The support is provided via a support element 23 that contacts the contact surface 20. The support element 23 is arranged radially 21 between the bevel gear 13 and the differential housing 4. The bevel gear 13 contacts the contact surface 20 at the support element 23 via a mating surface. The support element 23 contacts the contact surface 20 at the differential housing 4 via a mating surface. The support element 23 is torsionally connected to the differential housing 4 via an interference fit.

[0055] Contact via the contact surfaces 20 (the contact surfaces at the differential housing 4 and the support element 23) enables a frictionless rotatable connection between the differential housing 4 and the bevel gear 13 relative to the circumferential direction 14. Therefore, wear-free rotation of the bevel gear 13 relative to the differential housing 4 can be achieved during operation of the differential transmission mechanism 1.

[0056] Support between the differential housing 4 and the bevel gear 13 is provided via the contact of cylindrical surfaces 20 and 25, which are rotatably connected to each other and provide support relative to the radial direction 21. The cylindrical surfaces 20 and 25 extend parallel to the axis of rotation 7. The cylindrical surfaces 20 and 25 are located at the bevel gear 13 and the differential housing 4, and additionally at an additional support element 23.

[0057] The disc clutch 8 can be operated via a (known) operating device 35. The operating device 35 is arranged at the first drive shaft 5 and along the rotation axis 7 next to the disc clutch 8, so that the disc clutch 8 is arranged between the operating device 35 and the bevel gear 13. The discs 9 and 10 can be displaced along the rotation axis 7 via the operating device 35 and form an adjustable frictional engagement connection with each other.

[0058] The control device 35 includes two expansion discs supported by balls relative to the axial direction 24. Because the balls are arranged on an inclined plane, rotation of the expansion discs relative to each other in the circumferential direction 14 causes a change in their position in the axial direction 24. Both expansion discs are mounted on the first driven shaft 5, wherein the operating force is received on one side by a disc fixed on the first driven shaft 5 relative to the axial direction 24, and on the other side by the differential housing 4.

[0059] Driven shafts 5 and 6 extend toward the differential housing 4 and are connected therein to each of a bevel gear 13 in a form-fitting manner at least relative to the circumferential direction 14. Driven shafts 5 and 6 are arranged coaxially with each other, so that the differential housing 4 and driven shafts 5 and 6 share a common axis of rotation 7. Bevel gears 13 are rotatably arranged in the differential housing 4 together with driven shafts 5 and 6. Within the differential housing 4, driven shafts 5 and 6, or their bevel gears 13, are interconnected via other gears or bevel gears 13.

[0060] The first driven shaft 5 extends along the rotation axis 7 and is connected to the bevel gear 13 via a form-fitting structure 15, at least relative to the circumferential direction 14, through a bevel tooth portion, via a first outer peripheral surface 11 of the first driven shaft 5 and an inner peripheral surface 12 of the bevel gear 13. A section 16 of the second outer peripheral surface 17 of the bevel gear 13 is implemented as an inner disc support 18, and the differential housing 4 is implemented as an outer disc support 19. The inner disc 9 is form-fitted to the inner disc support 18 relative to the circumferential direction 14. The outer disc 10 is form-fitted to the outer disc support 19 relative to the circumferential direction 14. The inner disc 9 and the outer disc 10 are arranged alternately along an axial direction 24 (which extends along the rotation axis 7). By shifting the discs 9 and 10 along the axial direction 24, a friction-fitting connection structure can be constructed between the discs 9 and 10, thereby allowing the first driven shaft 5 to be adjustably connected to the differential housing 4.

[0061] The contact surfaces 20 (the contact surfaces at the differential housing 4 and the contact surfaces at the support element 23) are arranged along the rotation axis 7 between the bevel tooth portion 22 and the section 16 of the bevel gear 13.

[0062] The bevel gear 13 is supported at the contact surface 20 by a support element 23. Here, the discs 9 and 10 are supported on the differential housing 4 by the support element 23 relative to the axial direction 24 extending along the rotation axis 7. The support element 23 is connected to the differential housing 4 in an anti-torsional manner via an interference fit. Therefore, no relative rotation occurs between the outer disc 10 and the support element 23. The bevel gear 13 is supported on the support element 23 (or at the contact surface 20 of the support element 23) relative to the radial direction 21 by a columnar support surface 25 (mating surface) of the second outer peripheral surface 17 of the bevel gear 13.

[0063] The contact surface 20 of the differential housing 4 is arranged radially 21 outside the largest extension 26 of the bevel gear 13 relative to the radial direction 21. Therefore, the bevel gear 13 can be pushed into the differential housing 4 along the axial direction 24 for assembly of the differential transmission mechanism 1. With this arrangement of the bevel gear 13, an interference fit is formed between the support element 23 and the differential housing 4.

[0064] The first outer peripheral surface 11 of the first driven shaft 5 and the inner peripheral surface 12 of the bevel gear 13 form an overlapping region 27 along the rotation axis 7. This overlapping region has two adjacent overlapping region segments 28 and 29 arranged along the rotation axis 7. In the first overlapping region segment 28, a plurality of channels 30 are formed in the bevel gear 13, which extend from the inner peripheral surface 12 to a segment 16 of the second outer peripheral surface 17. The plurality of channels 30 are arranged in the first overlapping region segment 28, and are staggered from each other along the axial direction 24 and the circumferential direction 14.

[0065] Channel 30 is used to deliver fluid toward disc clutch 8. The form-fitting connection structure 15 (here, the bevel gear portion) between the first driven shaft 5 and the bevel gear 13 is arranged only in the second overlapping section 29. The first overlapping section 28 has a significantly larger diameter 36 than the second overlapping section 29.

[0066] The first overlapping section 28 is used to guide fluid along the first driven shaft 5 toward the channel 30. This requires a clearance between the first driven shaft 5 and the inner circumferential surface 12 of the bevel gear 13. However, this clearance reduces the area required to support the bevel gear 13 relative to the radial direction 21. As compensation for the loss of this support in the region of the first overlapping section 28, a support is provided at the contact surface 20 of the differential housing 4.

[0067] List of reference numerals in the attached diagram:

[0068] 1. Differential transmission mechanism

[0069] 2 axles

[0070] 3 motor vehicles

[0071] 4 Differential housing

[0072] 5 First driven shaft

[0073] 6 Second driven shaft

[0074] 7 Rotation axis

[0075] 8-disc clutch

[0076] 9 inner discs

[0077] 10 outer discs

[0078] 11 First outer peripheral surface

[0079] 12 inner circumferential surfaces

[0080] 13 bevel gears

[0081] 14 circumferential direction

[0082] 15 Connection Structure

[0083] 16 sections

[0084] 17 Second outer periphery

[0085] 18-inch inner disc support

[0086] 19 outer disc support

[0087] 20 contact surfaces

[0088] 21 Radial direction

[0089] 22 bevel teeth

[0090] 23 Supporting elements

[0091] 24 axial directions

[0092] 25 support surfaces

[0093] 26 extensions

[0094] 27 overlapping regions

[0095] 28 First overlapping region segment

[0096] 29 Second Overlapping Region Segment

[0097] 30 channels

[0098] 31 driver components

[0099] 32 drive units

[0100] 33 wheels

[0101] 34 drive shafts

[0102] 35 Control Device

[0103] 36 diameter

Claims

1. A differential transmission mechanism (1) for transmitting torque to an axle (2) of a motor vehicle (3), the differential transmission mechanism comprising at least a differential housing (4) and two driven shafts (5, 6) having a common axis of rotation (7), and a disc clutch (8) having at least one inner disc (9) and at least one outer disc (10), the disc clutch being used to switchably connect a first driven shaft (5) to the differential housing (4); wherein, The first driven shaft (5) extends along the rotation axis (7) and, via the first outer peripheral surface (11) of the first driven shaft (5) and the inner peripheral surface (12) of the bevel gear (13), at least relative to the circumferential direction (14), forms a connection structure (15) that mates with the bevel gear (13) in a shaped configuration; wherein the bevel gear (13) is supported at the contact surface (20) at the differential housing (4) at least relative to the radial direction (21), wherein the disc clutch (8) includes a section of the second outer peripheral surface (17) of the bevel gear (13). 16) The inner disc (9) and the outer disc (10) carried by the differential housing (4), wherein the contact surface (20) is arranged along the rotation axis (7) between the bevel tooth portion (22) of the bevel gear (13) and the section (16), and wherein the bevel gear (13) is supported at the contact surface (20) via a support element (23); wherein the discs (9, 10) are supported at the differential housing (4) via the support element (23) relative to the axial direction (24) extending along the rotation axis (7).

2. The differential transmission mechanism (1) according to claim 1, wherein, The support element (23) is arranged in a torsionally resistant manner on the differential housing (4) via an interference fit.

3. The differential transmission mechanism (1) according to any one of the preceding claims, wherein, The bevel gear (13) is supported at the contact surface (20) via a support element (23); wherein the bevel gear (13) is supported at the support element (23) with the second outer peripheral surface (17) implemented as a columnar support surface (25) relative to the radial direction (21).

4. The differential transmission mechanism (1) according to claim 3, wherein, The columnar support surface (25) is arranged along the rotation axis (7) between the bevel tooth portion (22) and the section (16).

5. The differential transmission mechanism (1) according to claim 1 or 2, wherein, The contact surface (20) is implemented in a columnar shape.

6. The differential transmission mechanism (1) according to claim 1 or 2, wherein, The contact surface (20) is arranged in the radial direction (21) outside the largest extension (26) of the bevel gear (13) relative to the radial direction (21).

7. The differential transmission mechanism (1) according to claim 1 or 2, wherein, The first outer peripheral surface (11) and the inner peripheral surface (12) are constructed to form an overlapping region (27) along the rotation axis (7). The overlapping region has two overlapping region segments (28, 29) arranged adjacent to each other along the rotation axis (7). In the first overlapping region segment (28), at least one channel (30) is constructed in the bevel gear (13), which extends from the inner peripheral surface (12) to a segment (16) of the second outer peripheral surface (17).

8. The differential transmission mechanism (1) according to claim 7, wherein, The form-fitting connection structure (15) between the first driven shaft (5) and the bevel gear (13) is arranged only in the second overlapping area section (29).

9. The differential transmission mechanism (1) according to claim 1 or 2, wherein, Of the driven shafts (5, 6), only the first driven shaft (5) can be connected to the differential housing (4) via a disc clutch (8).

10. A drive assembly (31) for a motor vehicle (3), the drive assembly comprising at least a drive unit (32) and a differential transmission mechanism (1) according to any one of the preceding claims, wherein, The differential transmission mechanism (1) is configured to transmit torque from the drive unit (32) to the two wheels (33) of the axle (2), wherein the torque of the drive unit (32) can be introduced into the differential transmission mechanism (1) via the differential housing (4) and can be further guided to each wheel (33) via each driven shaft (5, 6).

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