Bevel gear differential gear for motor vehicle and method for producing bevel gear differential gear

Abstract

The invention relates to a bevel gear differential gear (1) for a motor vehicle, comprising a gear housing (2) in which a first output gear (5), a second output gear (6) and at least one planetary gear (8) are rotatably mounted, the at least one planetary gear meshes both with the first driven gear (5) and with the second driven gear (6), and wherein the transmission housing is connected to the drive gear (7) in a rotationally fixed manner. According to the invention, the inner circumferential surface (25) of the drive gear (7) rests against the outer circumferential surface (26) of the transmission housing (2) around the transmission housing (2), said drive gear being supported on a differential pin (9) in the axial direction with respect to the rotational axis (15), said differential pin protruding from the transmission housing (2) through a pin receptacle, the at least one planetary gear (8) is rotatably mounted on the differential pin. The invention also relates to a method for producing a bevel gear differential transmission (1) for a motor vehicle.

Description

Field of the Invention

[0001] The present invention relates to a bevel gear differential drive for a motor vehicle, which has a drive housing in which a first driven gear, a second driven gear and at least one planet gear are rotatably supported. The planet gear meshes with both the first driven gear and the second driven gear, and the drive housing is non-rotatably connected to a drive gear. The present invention also relates to a method for manufacturing a bevel gear differential drive. Background Art

[0002] For example, the prior art document DE 10 2004 003 646 A1 is known. This document discloses a differential drive in which the mating diameter of a disc-shaped differential housing is smaller than the outer diameter of the differential housing.

[0003] In addition, the document DE 38 24 060 A1 discloses a self-locking differential drive having at least one toothed differential bevel gear rotatably supported in a rotatable housing, which differential bevel gear meshes with two half shaft bevel gears also rotatably supported in the housing respectively. In order to reduce the slip between drive gears with different loads, a blocking element is provided in the housing, which is used to block the relative rotation of at least one differential bevel gear or half shaft bevel gear coaxial with its axis of rotation as required.

[0004] In addition, the document DE 40 42 173 A1 discloses a differential drive having a drive gear and a plurality of bevel gears meshing with each other, which bevel gears are arranged in a housing non-rotatably connected to the drive gear, wherein at least one bevel gear is supported by a differential pin as a differential gear and meshes with a half shaft bevel gear. Herein, it is specified that a non-rotatable connection between the drive gear and the housing is established by a welded butt joint. Summary of the Invention

[0005] The object of the present invention is to provide a bevel gear differential drive for a motor vehicle, which has advantages over known bevel gear differential drives, is particularly simple and robust in structure, and can be manufactured and assembled at a relatively low cost.

[0006] According to the present invention, this is achieved by a bevel gear differential drive for a motor vehicle having the features of claim 1. Herein, it is specified that the drive gear abuts against the outer peripheral surface of the drive housing with its inner peripheral surface in a manner surrounding the drive housing, the drive gear is axially supported on a differential pin with reference to its axis of rotation, the differential pin passes through a pin receiving portion and extends from the drive housing, and the at least one planet gear is rotatably supported on the differential pin.

[0007] Advantageous designs and suitable improvements of the invention are given in the dependent claims. It should be noted that the embodiments described in the specification are not restrictive; rather, any variant of the features described in the specification, claims, and drawings can be implemented.

[0008] The bevel gear differential drive is preferably a component of a motor vehicle, but can obviously also exist separately from the motor vehicle. It is used, for example, to drivably connect a drive device to at least one drive wheel axle of the motor vehicle or to multiple wheels of the motor vehicle. The drive device preferably has at least one power device, which is, for example, an internal combustion engine or an electric motor.

[0009] The bevel gear differential drive can, for example, be used as a central differential drive. In this case, its drive gear is drivably connected to the drive device, while the first driven gear is drivably connected to the first wheel axle of the motor vehicle, and the second driven gear is drivably connected to the second wheel axle of the motor vehicle, preferably rigidly and / or permanently. This means that the first wheel axle and the second wheel axle are drivably connected to the drive device or the power device via the bevel gear drive, in particular only coupled via the bevel gear drive.

[0010] However, the bevel gear differential drive can also be used as an axle differential drive. In this case, the drive gear is again drivably connected to the drive device of the motor vehicle. The first driven gear is drivably connected to the first wheel of the wheel axle, and the second driven gear is drivably connected to the second wheel of the same wheel axle, preferably again rigidly and / or permanently coupled. Thus, the first wheel and the second wheel are drivably connected to the drive device or the power device via the bevel gear drive, in particular only connected via the bevel gear drive.

[0011] The bevel gear differential drive is used to distribute the drive torque conveyed through the drive gear to the first and second driven gears, or generally to distribute torque between the drive gear, the first driven gear, and the second driven gear. For this purpose, in addition to the drive gear, the first driven gear, and the second driven gear, the bevel gear differential drive has at least one planetary gear, which is rotatably supported in the transmission housing. At least one planetary gear meshes with the first driven gear and the second driven gear. In addition, at least one planetary gear is drivably connected to the drive gear, i.e., via a differential pin. For this purpose, at least one planetary gear is rotatably supported on the differential pin, which is drivably connected to the drive gear, preferably rigidly and / or permanently coupled.

[0012] The first driven gear is supported in such a way that it can rotate about the axis of rotation of the first driven gear, and the second driven gear is supported in such a way that it can rotate about the axis of rotation of the second driven gear, i.e., it is supported rotatably in the transmission housing. The axis of rotation of the first driven gear and the axis of rotation of the second driven gear are preferably the same. Furthermore, particularly preferably, they coincide with the axis of rotation of the drive gear, i.e., they correspond. In this case, the first driven gear, the second driven gear and the drive gear are arranged coaxially with each other. At least one planetary gear is supported in such a way that it can rotate about the axis of rotation of the planetary gear, wherein the axis of rotation of the planetary gear preferably coincides with the longitudinal central axis of the differential pin, and the planetary gear is supported at and by means of this differential pin.

[0013] The rotational movement of the drive gear is transmitted to at least one planetary gear via the differential pin, such that the planetary gear drives the first driven gear and the second driven gear. More precisely, the drive torque conveyed from the drive gear to the planetary gear via the differential pin is distributed to the first driven gear and the second driven gear. Whenever the planetary gear or at least one planetary gear is mentioned in this specification, these expressions are always equivalent. Of course, any number of planetary gears can be present. For example, a bevel gear differential drive has two planetary gears or four planetary gears. Here, two corresponding planetary gears are supported rotatably on one differential pin.

[0014] In order to achieve a simple and cost-effective design of the bevel gear differential drive, the differential pin should be used to support the drive gear in the axial direction, which is the axial direction with reference to the axis of rotation of the drive gear. This means that the differential pin fixes the drive gear in one direction in the direction of the axis of rotation, preferably in exactly one direction. Here, the differential pin particularly serves as an end stop for the drive gear, such that the differential pin fixes the drive gear relative to the transmission housing and in the direction of the axis of rotation in a first direction, but is allowed to shift in a second direction opposite to the first direction. The design of the bevel gear differential drive enables the force acting on the drive gear in the axial direction to be at least partially transmitted to the transmission housing by the differential pin, so that other connections existing between the drive gear and the transmission housing, such as a welded connection, are subjected to less mechanical load.

[0015] In principle, it is provided here that the drive gear surrounds the transmission housing and abuts the outer peripheral surface of the transmission housing with its inner peripheral surface. Thus, the drive gear first exists separately from the transmission housing and is only pushed onto the transmission housing during the assembly of the bevel gear differential drive, i.e., until it abuts the differential pin. When the drive gear abuts the differential pin, it is fixed to the transmission housing, for example, by a material-bonded connection, particularly by the already mentioned welding.

[0016] By introducing the force acting on the drive gear in the axial direction via the differential pin into the transmission housing, forces caused, for example, by the helical teeth of the drive gear are diverted, and the connection achieved only in a materially bonded manner is subjected to only a small load. Thus, the bevel gear differential transmission is extremely stable, yet at the same time simple in construction. If in this specification the axial direction, the radial direction and / or the tangential direction or circumferential direction are mentioned, they shall always be interpreted with reference to the axis of rotation of the drive gear, unless otherwise stated.

[0017] In addition to or in place of supporting the drive gear on the differential pin, the drive gear and the differential pin can also be designed such that the differential pin is fixed by the drive gear, in particular held form-fittingly. This can preferably be understood as follows: The drive gear and the differential pin are arranged and designed such that the drive gear fixes the differential pin in the axial direction and / or in the tangential direction with reference to the longitudinal central axis of the differential pin. Thus, in this case, a design of the bevel gear differential transmission is provided in which the drive gear holds the differential pin form-fittingly in the transmission housing and / or form-fittingly prevents its rotational movement about its own axis. This means that additional fixing or fastening of the differential pin can be dispensed with, which simplifies the construction of the bevel gear differential transmission compared to known bevel gear differential transmissions.

[0018] An improvement of the invention provides that the differential pin has receiving recesses on its end sides, which are bounded in the axial direction by a support surface against which the drive gear abuts for axial support. The receiving recesses are designed on the opposite sides of the differential pin. This means that each of the two free ends of the differential pin has such a receiving recess, or one of the receiving recesses. The receiving recess is bounded in the axial direction by a support surface, which serves as an end stop for the drive gear. Thus, after the bevel gear differential transmission is assembled, the drive gear abuts against the support surface bounding the receiving recess.

[0019] The support surface is formed by the differential pin. Preferably, the receiving recess only partially penetrates the differential pin in the axial direction, preferably up to 60%, up to 50% or up to 40%. Particularly preferably, the receiving recess generally penetrates the differential pin in the axial direction such that the support surface corresponds to the longitudinal central axis of the differential pin. This means that the longitudinal central axis does not intersect the support surface at a non-zero angle, but the support surface is parallel to the longitudinal central axis, and the longitudinal central axis simultaneously penetrates both support surfaces.

[0020] If the differential pin is cylindrical or at least substantially cylindrical, the receiving recess is preferably semi-cylindrical. The receiving recess extends correspondingly only over a part of the differential pin in the direction of the longitudinal central axis of the differential pin. Preferably, with reference to the entire extent of the differential pin in the direction of its longitudinal central axis, the receiving recess extends over the uppermost 10%, uppermost 5% or uppermost 2.5% of this extent. Additionally or alternatively, the extent of the receiving recess in the direction mentioned is correspondingly at least 1% of the entire extent of the differential pin. The illustrated design reliably enables the axial support of the drive gear.

[0021] An improvement of the invention provides that the drive gear engages into the receiving recess of the differential pin such that the drive gear base with the inner peripheral surface thereof only partially overlaps the differential pin in the axial direction. The drive gear base is understood to be the region of the drive gear facing the transmission housing. For example, radially outwardly adjacent to the drive gear base are the drive gear wall and the toothing ring of the drive gear, wherein the drive gear base is drivingly connected to the toothing ring via the drive gear wall. Particularly preferably, the drive gear base, the drive gear wall and the toothing ring are integrally formed and designed to be made of the same material.

[0022] Preferably, the drive gear wall has a smaller dimension in the axial direction than the drive gear base and the toothing ring. Further preferably, the drive gear wall is arranged centrally relative to the toothing ring in the axial direction. However, the drive gear base can be arranged asymmetrically on the drive gear wall in the axial direction, i.e., in the direction of the axis of rotation of the drive gear, it projects further out of the drive gear wall in a first direction than in a second direction opposite to the first direction. The inner peripheral surface is located radially inside the drive gear base. For example, the inner peripheral surface extends inside over the entire drive gear base.

[0023] The drive gear base abuts locally against the outer peripheral surface of the transmission housing and projects into the receiving recess of the differential pin. Here, the drive gear base preferably abuts against a support surface. Particularly preferably, the drive gear base has a mating support surface extending parallel to the support surface for this purpose, such that the mating support surface of the drive gear base abuts in a surface-like manner against the support surface of the differential pin in order to support the drive gear in the axial direction. The mating support surface is preferably a continuous toroidal surface. By the drive gear base abutting against the support surface, the drive gear base only partially overlaps the differential pin in the axial direction. Thus, on the one hand, the drive gear base supports the drive gear in the axial direction, and on the other hand, the drive gear retains the differential pin form-fittingly in the transmission housing. Accordingly, no additional fixing measures are required to fix the differential pin. This is achieved only by the drive gear partially overlapping the differential pin.

[0024] An improved embodiment of the present invention provides that the receiving recess is defined radially inwards by the bottom of the receiving recess, wherein at least one of the bottoms of the receiving recesses is spaced apart from the inner circumferential surface of the drive gear. Accordingly, the receiving recess is defined by one of the support surfaces and one of the bottoms of the receiving recesses. The distance between the two bottoms of the receiving recesses is preferably less than the diameter of the inner circumferential surface of the drive gear. Thus, at least one of the bottoms of the receiving recesses is always spaced apart from the inner circumferential surface. Particularly preferably, both bottoms of the receiving recesses are spaced apart from the inner circumferential surface and are located in the transmission housing. This reliably prevents the drive gear and the differential pin from influencing each other, for example due to different coefficients of thermal expansion.

[0025] An improved embodiment of the present invention provides that the transmission housing is multi-piece and has a first housing part and a second housing part, wherein the first driven gear is supported in the first housing part, the second driven gear is supported in the second housing part, and the support recess for receiving the differential pin is formed in the first housing part in an edge-closed manner. Accordingly, the transmission housing consists of the first housing part and the second housing part. The first housing part and the second housing part are preferably forgings, i.e., made by forging. However, it can also be provided that at least one of the housing parts, for example the first housing part, is present as a sintered part, i.e., made by sintering.

[0026] The housing parts are for supporting the driven shafts and the planetary gears. The differential pin is arranged in the support recess, which preferably consists of sub-support recesses spaced apart from each other, and the differential pin engages in the sub-support recesses on opposite sides. The support recess is formed in an edge-closed manner only or solely in the first housing part with reference to its longitudinal central axis in the circumferential direction. Accordingly, the support recess is not jointly defined by the first housing part and the second housing part in the circumferential direction, but the support recess is only present in the first housing part and is spaced apart from the second housing part. This enables simple assembly of the bevel gear differential transmission.

[0027] An improved embodiment of the present invention provides that the first housing part has a connecting ring which defines a housing part receiving portion for receiving the second housing part in the radial direction towards the outside, and abuts and is fixed to the second housing part on one side and abuts and is fixed to the drive gear on the other side. The connecting ring is arranged on the base body of the first housing part. For example, the connecting ring is connected to the base body via a connecting bridge portion, wherein the connecting bridge portion tapers in the radial direction with respect to the connecting ring. For this purpose, the connecting ring has notches on the radially inner side and / or the radially outer side, which extend continuously or at least almost continuously in the circumferential direction in the form of an annular groove. Particularly preferably, such notches or annular grooves are present both on the radially inner side and on the radially outer side. They are used to simply connect the connecting ring to the second housing part and the drive gear by welding, in particular by laser welding. The base body, the connecting bridge portion and the connecting ring are preferably constructed integrally and designed to be made of the same material.

[0028] In summary, the connecting ring defines (specifically, preferably continuously) a housing part receiving portion present in the first housing part in the radial direction towards the outside. After assembling the bevel gear differential drive, the second housing part is located in the housing part receiving portion, so that it abuts the connecting ring from the inside. At the same time, the drive gear abuts the connecting ring from the outside. During the assembly of the bevel gear differential drive, the first housing part is fixed to the second housing part and the drive gear, preferably by material fixation, for example by welding. The connecting ring enables this to be achieved in a particularly simple manner. It can be provided that ventilation holes are assigned to the connecting ring, which completely penetrate the wall portion of the first housing part in the radial direction. For example, the ventilation holes are formed in or lead into one of the notches or the notches. The ventilation holes are also used to reliably establish a connection by material bonding.

[0029] An improved embodiment of the present invention provides that in addition to the differential pin, there is also an additional differential pin which at least partially penetrates the differential pin. The additional differential pin is used to support at least one other planetary gear in the transmission housing. Thus, at least one planetary gear is rotatably supported in the transmission housing by means of the differential pin, and at least one other planetary gear is rotatably supported in the transmission housing by means of the additional differential pin. Preferably, at each differential pin in the differential pins, that is, at the differential pin and the additional differential pin, there are two planetary gears respectively, and they are rotatably supported by means of the corresponding differential pins.

[0030] A further differential pin is likewise preferably used for axially supporting the drive gear. For this purpose, the further differential pin preferably has receiving recesses on the end sides similar to the differential pin. By analogy with the corresponding description, the analogy can be made. To enable simple assembly of the further differential pin, the further differential pin engages into or at least partially penetrates the differential pin. Particularly preferably, the further differential pin consists of a plurality of differential sub-pins which are inserted into the differential pin, more precisely into the bore of the differential pin, from opposite sides. Since the differential pin and the further differential pin are fixed by means of the drive gear, this is easily achieved.

[0031] The invention further relates to a method for manufacturing a bevel gear differential transmission for a motor vehicle, in particular a bevel gear differential transmission according to the embodiments in this specification, wherein the bevel gear differential transmission has a transmission housing in which a first driven gear, a second driven gear and at least one planet gear meshing with the first driven gear and the second driven gear are rotatably supported, and the transmission housing is non-rotatably connected to the drive gear. It is hereby provided that the drive gear is arranged to abut against the outer peripheral surface of the transmission housing with its inner peripheral surface in a manner surrounding the transmission housing, the drive gear is axially supported on a differential pin with reference to the axis of rotation, the differential pin projects from the transmission housing, and the at least one planet gear is rotatably supported on the differential pin.

[0032] The advantages of such a solution for manufacturing a bevel gear transmission and the corresponding design of a bevel gear differential transmission have been pointed out. The bevel gear differential transmission and the method for manufacturing a bevel gear differential transmission can be improved according to the embodiments in this specification, and in this regard, reference can be made to these embodiments.

[0033] In summary, in the method described, it is provided that the drive gear is arranged on the transmission housing such that the drive gear surrounds the transmission housing and abuts against the outer peripheral surface with its inner peripheral surface, so that the drive gear is axially supported on the differential pin.

[0034] An improved embodiment of the present invention provides that a method for manufacturing a bevel gear differential drive has the following steps: installing a first driven gear into a first housing part of a drive housing; introducing differential pins into bearing recesses of the first housing part and placing at least one planetary gear onto the differential pins; installing a second driven gear into the first housing part; completing the drive housing by placing a second housing part onto the first housing part; placing a drive gear until it reaches an end stop formed by a support surface of the differential pins; fixing the first housing part to the second housing part and to the drive gear. The above steps are preferably carried out in a given order. The fixing of the first housing part to the second housing part and to the drive gear is particularly preferably achieved by a material-bonded connection, in particular by welding, and very particularly preferably by laser welding.

[0035] The described embodiment enables simple and cost-effective manufacturing of a bevel gear differential drive.

[0036] An improved embodiment of the present invention provides that, for fixing, the first housing part is connected to the second housing part in a material-bonded manner along a first circumferential line and to the drive gear in a material-bonded manner along a second circumferential line concentric with the first circumferential line. The material-bonded connections along the first circumferential line and the second circumferential line are particularly preferably carried out at least briefly simultaneously. This means that the material-bonded connection along the second circumferential line is at least partially carried out simultaneously with the material-bonded connection along the first circumferential line. Particularly preferably, the connections along the two circumferential lines are carried out simultaneously, but with a certain offset in the circumferential direction. Here, the offset is, for example, at least 90° and at most 270°, at least 135° and at most 235°, at least 150° and at most 210°, or approximately or exactly 180°.

[0037] The features and combinations of features described in the description, in particular those described and / or shown in the following description of the drawings and / or in the drawings, can be used not only in the specifically specified combinations, but also in other combinations or individually, without departing from the scope of the present invention. Therefore, embodiments that are not explicitly shown or described in the description and / or the drawings, but are derived from or can be derived from the described embodiments, should also be considered to be covered by the present invention. Description of the Drawings

[0038] The present invention will be further illustrated below with reference to the embodiments shown in the drawings, but the present invention is not limited thereto. Among them:

[0039] Figure 1 A schematic diagram of a bevel gear differential drive in a first manufacturing step is shown;

[0040] Figure 2Shows a schematic view of the bevel gear differential drive in the second manufacturing step;

[0041] Figure 3 Shows a schematic view of the bevel gear differential drive in the third manufacturing step;

[0042] Figure 4 Shows a schematic view of the differential pin and an additional differential pin,

[0043] Figure 5 Shows a schematic cross-sectional view of the differential pin and an additional differential pin. Detailed Description

[0044] Figure 1 Shows a schematic view of the bevel gear differential drive 1 in the first manufacturing step. The bevel gear differential drive 1 has a drive housing 2, which includes a first housing part 3 and a second housing part 4 (not shown). The first driven gear 5 is rotatably supported on the first housing part 3, and the second driven gear 6 (not shown) is rotatably supported on the second housing part 4. The drive housing 2 is non-rotatably connected to a drive gear 7 (also not shown) and is used to rotatably support at least one planetary gear 8, which meshes with the first drive gear 5 and the second driven gear 6 and is in driving connection with the drive gear 7. In the illustrated embodiment, there are a plurality of planetary gears 8, which are respectively rotatably supported on the drive housing 2 by means of differential pins 9.

[0045] In addition to the planetary gears 8, the bevel gear differential drive 1 shown here optionally has at least one other planetary gear 10, and in the illustrated embodiment, there are a plurality of other planetary gears 10. They are also rotatably supported on the drive housing 2 by means of additional differential pins 11. The additional differential pin 11 consists of a first differential sub-pin 12 and a second differential sub-pin 13. They engage into the differential pin 9, which is also partially sectioned here, from opposite sides. At the differential pins 9, 11, receiving recesses 14 are respectively shown. With reference to the rotational axes 15 of the driven gears 5, 6 and the drive gear 7, the receiving recesses are bounded in the axial direction by a support surface 16 and in the radial direction inward by a receiving recess bottom 17. Therefore, the receiving recess 17 only partially penetrates the differential pins 9, 11 in the axial direction, preferably penetrating half of the differential pin.

[0046] The first housing part 3 has a base body 18 to which a connecting ring 20 is connected via a connecting bridge 19. The connecting ring 20 serves to connect the first housing part 3 to the second housing part 4 and the drive gear 7. The connecting bridge 19 is likewise substantially annular, however having a smaller thickness in the radial direction than the connecting ring 20. For this purpose, at the connecting bridge 19, a first notch 21 is designed inside in the radial direction and a second notch 22 is designed outside in the radial direction. In addition, the connecting bridge 19 can be penetrated by a ventilation opening 23. The notches 21, 22 serve to receive welding material during the welding of the connecting bridge 19 to the second housing part 4 and the drive gear 7.

[0047] Figure 2 The bevel gear differential gear 1 in the second manufacturing step is schematically shown. In this second manufacturing step, the second driven gear 6 and the second housing part 4 are mounted on the first housing part 3. It can be seen that the second housing part 4 is arranged on the housing part receiving portion 24 of the first housing part 3 and bears against the connecting ring 20 inside in the radial direction. At the same time, the second housing part 4 extends through the connecting bridge 19, bears against the base body 18 in the axial direction, and is supported on the base body.

[0048] Figure 3 Another schematic view of the bevel gear differential gear 1 in the third manufacturing step is shown. In the third manufacturing step, the drive gear 7 is arranged on the transmission housing 2, more precisely on the first housing part 3. The drive gear 7 bears with its inner circumferential surface 25 against the outer circumferential surface 26 of the transmission housing 2. Here, the inner circumferential surface 25 is located on the drive gear base 27 of the drive gear 7, which is non-rotatably connected to the toothing ring 29 of the drive gear 7 via a drive gear wall 28. The drive gear base 27 bears against the connecting ring 20 outside in the radial direction and projects beyond the first housing part 3, more precisely beyond its outer circumferential surface 26, up to beyond a differential pin 9 and a further differential pin 11.

[0049] Thus, the base 27 of the drive gear partially, and in particular only partially, overlaps with the differential pins 9, 11. Here, the base of the drive gear abuts against the support surface 16, that is, preferably, the differential pins 9, 11 are fixed in the circumferential direction with respect to their respective longitudinal central axes. Thus, by means of one of the differential pins 9, 11 overlapping with the base 27 of the drive gear, the differential pins 9, 11 are fixed on the transmission housing 2 on the one hand and are also fixed in the tangential direction with respect to their respective longitudinal central axes on the other hand. After the drive gear 7 is placed on the transmission housing 2 until it reaches the support surface 16, the first housing part 3 is fixed on the second housing part 4 and the drive gear 7. The fixing of the first housing part 3 on the second housing part 4 is carried out along the first circumferential line 30, and the fixing of the first housing part 3 on the drive gear 7 is carried out along the second circumferential line 31. The fixing is preferably carried out by welding, in particular by laser welding.

[0050] Figure 4 A schematic view of the differential pins 9, 11 is shown. It can be clearly seen again that the other differential pin 11 consists of two differential sub-pins 12, 13, which engage into the differential pin 9 on their radial inner sides. For this purpose, they taper towards the differential pin 9 respectively.

[0051] Figure 5 A schematic cross-sectional view of the differential pins 9, 11 is shown. It can be seen that the differential sub-pins 12, 13 respectively have protrusions 32 that engage into the differential pin 9. Here, the protrusions 32 of the two differential sub-pins 12, 13 preferably abut against each other at their free ends, so that the differential sub-pins 12, 13 abut against each other and together completely penetrate the differential pin 9. This ensures sufficient stability of the other differential pin 11.

[0052] List of reference numerals

[0053] 1 Bevel gear differential drive

[0054] 2 Transmission housing

[0055] 3 First housing part

[0056] 4 Second housing part

[0057] 5 First driven gear

[0058] 6 Second driven gear

[0059] 7 Drive gear

[0060] 8 Planet gear

[0061] 9 Differential pin

[0062] 10 Another planet gear

[0063] 11 Additional differential pin

[0064] 12 First differential sub-pin

[0065] 13 Second differential sub-pin

[0066] 14 Receiving recess

[0067] 15 Axis of rotation

[0068] 16 Support surface

[0069] 17 Bottom of the receiving recess

[0070] 18 Substrate

[0071] 19 Connecting bridging part

[0072] 20 Connecting ring

[0073] 21 First notch

[0074] 22 Second notch

[0075] 23 Vent

[0076] 24 Housing component receiving part

[0077] 25 Inner peripheral surface

[0078] 26 Outer peripheral surface

[0079] 27 Driving gear base

[0080] 28 Driving gear wall part

[0081] 29 Tooth ring

[0082] 30 First circumferential line

[0083] 31 Second circumferential line

[0084] 32 Protrusion

Claims

1. A bevel gear differential drive device (1) for a motor vehicle, the bevel gear differential drive device having a drive device housing (2), in which a first driven gear (5), a second driven gear (6) and at least one planetary gear (8) are rotatably supported, the at least one planetary gear meshing with both the first driven gear (5) and the second driven gear (6), and the drive device housing being non-rotatably connected to a drive gear (7). It is characterized in that the drive gear (7) abuts against the outer peripheral surface (26) of the drive device housing (2) with its inner peripheral surface (25) in a manner surrounding the drive device housing (2), the drive gear being axially supported on a differential pin (9) with respect to a rotational axis (15), the differential pin passing through a pin receiving portion and protruding from the drive device housing (2), and the at least one planetary gear (8) being rotatably supported on the differential pin.

2. The bevel gear differential drive device according to claim 1, It is characterized in that the differential pin (9) has a receiving recess (14) at its end side, the receiving recess being axially bounded by a support surface (16), and the drive gear (7) abutting against the support surface for axial support.

3. The bevel gear differential drive device according to any one of the above claims, It is characterized in that the drive gear (7) engages into the receiving recess (14) of the differential pin (9) such that the drive gear base (27) of the drive gear (7) having the inner peripheral surface (25) only partially overlaps the differential pin (9) axially.

4. The bevel gear differential drive device according to any one of the above claims, It is characterized in that the receiving recess (14) is radially inwardly bounded by a receiving recess bottom (17), wherein at least one of the receiving recess bottoms in the receiving recess bottom (17) is spaced apart from the inner peripheral surface (25) of the drive gear (7).

5. The bevel gear differential drive device according to any one of the above claims, It is characterized in that the drive device housing (2) is multi-piece and has a first housing part (3) and a second housing part (4), wherein the first driven gear (5) is supported in the first housing part (3), the second driven gear (6) is supported in the second housing part (4), and a support recess for receiving the differential pin (9) is formed in the first housing part (3) in an edge-closed manner.

6. The bevel gear differential drive device according to any one of the above claims, It is characterized in that the first housing part (3) has a connecting ring (20), which radially outwardly defines a housing part receiving portion (24) for receiving the second housing part (4), and the connecting ring abuts against and is fixed to the second housing part (4) on one side and abuts against and is fixed to the drive gear (7) on the other side.

7. The bevel gear differential drive device according to any one of the above claims, It is characterized in that in addition to the differential pin (9), another differential pin (11) is provided, and the another differential pin at least partially penetrates the differential pin (9).

8. A method for manufacturing a bevel gear differential drive (1) for a motor vehicle, the bevel gear differential drive (1) being in particular the bevel gear differential drive (1) according to any one or more of the preceding claims, wherein, the bevel gear differential drive (1) has a drive housing (2), in which a first driven gear (5), a second driven gear (6) and at least one planet gear (8) are rotatably supported. The at least one planet gear meshes with both the first driven gear (5) and the second driven gear (6). The drive housing is non-rotatably connected to a drive gear (7). It is characterized in that the drive gear (7) is arranged to abut against the outer peripheral surface (26) of the drive housing (2) with its inner peripheral surface (25) in a manner surrounding the drive housing (2). The drive gear is axially supported on a differential pin (9) with respect to a rotation axis (15). The differential pin projects from the drive housing (2), and the at least one planet gear (8) is rotatably supported on the differential pin.

9. The method according to claim 8 ， characterized by the following steps: - Installing the first driven gear (5) into a first housing part (3) of the drive housing (2); - Introducing the differential pin (9) into a support recess of the first housing part (3) and installing the at least one planet gear (8) onto the differential pin (9); - Installing the second driven gear (6) into the first housing part (3); - Completing the drive housing (2) by placing a second housing part (4) onto the first housing part (3); - Placing the drive gear (7) until it reaches an end stop formed by a support surface (16) of the differential pin (9); - Fixing the first housing part (3) to the second housing part (4) and to the drive gear (7).

10. The method according to any one of the preceding claims, characterized in that, for fixing, the first housing part (3) is connected to the second housing part (4) in a material-bonded manner along a first circumferential line (30) and to the drive gear (7) in a material-bonded manner along a second circumferential line (31) concentric with the first circumferential line (30).

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