Locking differential device for a motor vehicle

Abstract

The invention relates to a locking differential device (1) for a motor vehicle comprising: - a differential basket (2) in which at least three bevel gears (3, 4, 5, 5A) are arranged, - a first bevel gear (3), connectable to a first output shaft, - a second bevel gear (4), connectable to a second output shaft, - at least a third bevel gear (5, 5A), rotatably arranged about a bevel gear axis (6) of the locking differential device (1), - a bevel gear axle (6), arranged in a rotationally fixed manner with the differential basket (2), - wherein at least one third bevel gear (5, 5A) is engaged or meshes with the first and second bevel gears (3, 4), and - a coupling (7) for detachably connecting the differential basket (2) and the second bevel gear (4), - wherein the locking differential device (1) has a coolant guide device (14) which guides coolant from outside the differential basket (2) in a radial direction (R) inwards to the clutch (7) in order to cool it.

Description

[0001] The invention relates to a locking differential device for a motor vehicle.

[0002] Conventional limited-slip differentials employ a clutch, such as a multi-plate clutch, which provides a locking function that disables the differential's actual function. In such limited-slip differentials, the clutch is implemented using a costly and inefficient cooling system.

[0003] In this process, a bore is created within a shaft. This bore connects a coolant reservoir to the clutch to be cooled. At the bore's outlet, the coolant flows radially from the inside out towards the clutch, i.e., in the direction of centrifugal force, to cool it. To do this, the coolant must first flow past other components within the limited-slip differential assembly before reaching the clutch. Heat is exchanged along the way, resulting in a less effective cooling effect at the clutch than if the coolant were applied directly.

[0004] Against this background, the object of the present invention is to provide a locking differential device for a motor vehicle which can be manufactured cost-effectively and which improves the cooling of a clutch of the locking differential device.

[0005] This problem is solved by the features of the independent patent claim. Further advantageous developments are the subject of the dependent claims.

[0006] The present invention comprises a locking differential device for a motor vehicle. The locking differential device can be used or installed on a rear axle or on a front axle of a motor vehicle.

[0007] The locking differential device has a differential basket in which at least three bevel gears are arranged.

[0008] Furthermore, the locking differential device comprises a first bevel gear, connectable to a first output shaft. The first bevel gear can be connected to a first output shaft by friction and / or positive locking. The first bevel gear can also have a hub for a shaft-hub connection. In addition, the first bevel gear can include a splined shaft profile, a polygonal profile, a toothed shaft profile, a serrated gear, or an additional drive element for power transmission to a first output shaft.

[0009] Furthermore, the locking differential device features a second bevel gear, connectable to a second output shaft. This second bevel gear can be frictionally and / or positively connected to the second output shaft. The second bevel gear can also include a hub for a shaft-hub connection. Additionally, the second bevel gear can incorporate a splined shaft profile, a polygonal profile, a toothed shaft profile, a serrated gear, or an additional drive element for power transmission to the second output shaft.

[0010] Furthermore, the locking differential device comprises a third bevel gear, or at least one third bevel gear, rotatably arranged about a bevel gear axis of the locking differential device. It should be noted that throughout this description the term "third bevel gear" may be replaced by the term "at least one third bevel gear".

[0011] Furthermore, the locking differential device includes a bevel gear shaft, which is non-rotatably connected to the differential housing. Additionally or supplementarily, the locking differential device may include a bevel gear shaft that can be located inside the differential housing. The bevel gear shaft can be in the form of a bolt or a pin. The third bevel gear is also engaged with, or meshes with, the first and second bevel gears.

[0012] Furthermore, the locking differential device includes a clutch, such as a multi-plate clutch, for releasably connecting the differential housing and the second bevel gear. The locking differential device may also include a clutch, such as a multi-plate clutch, between the differential housing and the second bevel gear. In this case, the multi-plate clutch may be located inside the differential housing.

[0013] Furthermore, the clutch or multi-plate clutch can have several outer plates, several inner plates, a pressure plate, and / or a plate carrier for the outer or inner plates. The outer or inner plates can be arranged on the plate carrier in a rotationally fixed and / or axially displaceable manner. The connection of the outer or inner plates to the plate carrier can also be designed such that, in the radial direction, the outer or inner plates are at least partially radially spaced from the plate carrier to create axial fluid channels for coolant delivery. This allows for better coolant supply to the plates located further away from a spray nozzle of the limited-slip differential device.

[0014] The lamellar carrier can be rotationally fixed and / or materially bonded and / or attached to the outside of the second bevel gear.

[0015] Furthermore, the outer lamellae, the inner lamellae and the pressure plate can be arranged in such a way that when pressure is applied to the pressure plate, the outer and inner lamellae are pushed together against the differential basket to form a frictional connection between the differential basket and the second bevel gear.

[0016] Furthermore, the locking differential device may include an actuating mechanism for activating and deactivating the clutch or multi-plate clutch. The actuating mechanism may be configured and designed to convert a rotational force into an axial force to activate and / or deactivate the clutch or multi-plate clutch.

[0017] Furthermore, the locking differential device can include an actuating actuator to control or actuate the actuating mechanism. The actuating mechanism and the clutch or multi-plate clutch can be arranged, for example, diametrically opposite to the axis of rotation of the third bevel gear and / or to the axis of the bevel gear shaft.

[0018] Furthermore, the limited-slip differential device includes a coolant guide system that directs coolant from outside the differential housing radially inwards, e.g., directly or via a direct route, to the clutch or multi-plate clutch for cooling purposes. The coolant guide system can also be configured to direct coolant radially inwards through the differential housing, its outer wall, or its housing, e.g., directly or via a direct route, to the clutch or multi-plate clutch for cooling purposes. Additionally, the coolant guide system can be configured such that coolant can be conveyed radially inwards without an additional pump or conveying device, e.g., simply by the rotational movement of the limited-slip differential device. This allows for cost-effective and simple manufacturing as well as efficient cooling.The coolant guide device can be arranged in a rotationally fixed manner, e.g., outside the differential basket.

[0019] The coolant guidance system can also be designed and configured to guide coolant, for example, simply by the rotational movement of the differential carrier or the rotational movement of the locking differential device in a radial direction inwards to the clutch or the multi-plate clutch, e.g., through the differential carrier, through the outer wall of the differential carrier, or through the housing of the differential carrier. Thus, a pumping action can be generated by means of the rotational movement of the differential carrier, which conveys coolant from radially outside the locking differential device in a radial direction inwards. Efficient cooling can therefore be achieved.

[0020] Furthermore, the coolant guidance system can comprise several guide vanes, which are arranged, for example, radially on the outside of the differential housing and / or radially between the differential housing and a spray nozzle of the limited-slip differential. Thus, coolant can be applied from a spray nozzle to the guide vanes, which then convey it radially inwards. This enhances the conveying effect of the coolant guidance system. Additionally, the guide vanes act as cooling fins, dissipating heat from the differential housing in addition to guiding the coolant. Consequently, efficient cooling can be achieved in this way.

[0021] A guide vane can have a thickness that is less than 15 percent of its length and / or height. Therefore, the coolant guide system only slightly increases the weight of the entire limited-slip differential assembly.

[0022] A guide vane can also be manufactured using a machining process. This makes a cost-effective manufacturing option feasible.

[0023] Furthermore, the coolant guide system can have fewer than 13 guide vanes or exactly 12 guide vanes. The number of guide vanes can also correspond to the number of openings in the coolant guide system that provide access from the radially outer surface to the radially inner surface of the coolant guide system. Additionally, the number of guide vanes can correspond to the number of passages in the differential carrier that provide access or a passage from the outside of the differential carrier to the interior of the differential carrier.

[0024] Furthermore, the guide vanes can be spirally shaped to create a conveying effect in a radial direction inwards, e.g. when a motor vehicle is moving forward.

[0025] Furthermore, the guide vanes can be designed and configured to generate a conveying effect in the axial and / or radial direction, directing coolant from a spray nozzle of the limited-slip differential towards the clutch or multi-plate clutch, e.g., during forward travel of a motor vehicle. An axial conveying effect also has the advantage of improving the flow of coolant along the clutch or in the axial direction of the clutch.

[0026] Each guide vane can form a funnel with an inner ring of the coolant guide device, which can narrow radially inwards. At the narrowest point of the formed funnel, an opening of the coolant guide device can be arranged, providing radial access from the outer surface of the coolant guide device to the inner surface.

[0027] Furthermore, it may be provided that the coolant guide device is designed in an annular and / or hollow cylindrical form.

[0028] The coolant guide device can also include an inner ring, the inner surface of which is positioned against the differential basket.

[0029] Furthermore, the coolant guidance device can include an inner ring, on the outer surface of which guide vanes of the coolant guidance device are arranged.

[0030] As already indicated, the coolant guide device can include several openings. Each opening can provide radial access from the outer surface of the device to the inner surface of the device.

[0031] Furthermore, the locking differential device may include a coolant spray nozzle. Viewed in the axial direction of the locking differential device, the spray nozzle may be located between the bevel gear shaft and the clutch or the clutch pressure plate.

[0032] The spray nozzle can also include a spray angle.

[0033] The spray nozzle or a central axis of the spray nozzle, which bisects the spray angle, may be inclined towards the clutch or multi-plate clutch and / or in the axial direction of the locking differential device.

[0034] Furthermore, the spray nozzle or a central axis of the spray nozzle, which bisects the spray angle, can be inclined away from the ideal radial direction, such that the central axis or the spray nozzle corresponds to an angle of attack of guide vanes of the coolant guide device. This allows, during rotation of the locking differential device, coolant to flow partially and / or at least temporarily and / or intermittently and / or directly from the spray nozzle into an opening of the coolant guide device, which provides access to the clutch or the multi-plate clutch.

[0035] In addition, the spray nozzle or a central axis of the spray nozzle, which bisects the spray angle, can be aligned in such a way that at least one spatial component is oriented in the direction of gravity in order to act in addition to the coolant pressure, e.g. against the blade or rotation direction of the guide vanes, which increases the available kinetic energy and thus results in a greater conveying effect.

[0036] The inventive concept presented above is expressed again and in addition in other words below.

[0037] This idea – in simplified terms – concerns a locking differential device for a motor vehicle.

[0038] In this context, guide vanes or oil guide vanes can be provided radially between the differential carrier and the spray nozzle of the limited-slip differential device, offering a high "open" angle ratio relative to the circumference. This is possible, for example, if the vane thickness is kept small and a small number of vanes are used. The number of guide vanes can then correspond to the number of passages in the differential carrier.

[0039] Furthermore, the guide vanes can be arranged not purely radially, but spirally shaped to create a conveying effect radially inwards or in a radial direction inwards when driving forwards.

[0040] The guide vanes can also be axially angled, creating a conveying effect in the axial direction from the spray nozzle towards the clutch or multi-plate clutch when driving forward.

[0041] The two edges or borders of each individual blade opening can be designed so that they narrow radially inwards and open radially inwards into openings or outlet openings.

[0042] Furthermore, the spray nozzle cannot be arranged axially in the center, at the level of the bevel gear axes, but axially between the center planes of the locking differential device and the clutch or multi-plate clutch, so that the spray nozzle sprays next to the receiving areas of the differential basket for the bevel gear axes and these therefore do not obstruct the oil jet or cooling jet.

[0043] Furthermore, the spray nozzle can be angled axially towards the clutch or multi-plate clutch and / or tangentially aligned so that the cooling jet roughly corresponds to the angle of attack of the guide vanes and thus, when the locking differential device rotates, at least partially reaches the passage in the differential basket directly, without being deflected by the edges or borders.

[0044] The cooling jet can also be directed downwards to act against the blade direction of the guide vanes in addition to the oil pressure or coolant pressure through gravity, which increases the available kinetic energy and thus results in a greater pumping effect.

[0045] Furthermore, the grooves for receiving inner fins can not all be radially narrow (as would be conventional), but can either be partially or all radially spaced and / or some inner radial extensions of the inner fins can be omitted or completely removed to create axial channels for conveying coolant in order to more easily supply the fins further away from the spray nozzle with coolant.

[0046] The invention is explained in more detail below with reference to an exemplary embodiment and the accompanying drawings. These schematically show: Fig. 1. A side view of a locking differential device for a motor vehicle; Fig. 2 a top view of Fig. 1; Fig. 3 a sectional view of the locking differential device Fig. 1 along line AA; Fig. 4 a sectional view of the locking differential device Fig. 1; Fig. 5 a spatial sectional view of the locking differential device Fig. 1. Fig. 6 a sectional view of a coolant guide device of the locking differential device Fig. 1; and Fig. 7 a spatial view of the coolant guide system Fig. 6.

[0047] In the following description, the same reference symbols are used for the same objects.

[0048] Fig. Figure 1 shows a side view of a locking differential device 1 for a motor vehicle, wherein in Fig. 2 a top view of Fig. 1 is shown.

[0049] Fig. Figure 3 shows a sectional view of the locking differential device 1. Fig. 1 along line AA and in Fig. Figure 4 is a sectional view of the locking differential device 1. Fig. 1 shown.

[0050] In Fig. Figure 5 is a spatial sectional view of the locking differential device 1. Fig. 1 shown.

[0051] For the sake of simplicity and brevity, the following are the Fig. 1 to 5 are described together.

[0052] The figures mentioned show a locking differential device 1 for a motor vehicle.

[0053] The locking differential device 1 has a differential basket 2 in which four bevel gears 3, 4, 5, 5A are arranged.

[0054] The locking differential device 1 thus comprises a first bevel gear 3, connectable to a first output shaft (not shown), a second bevel gear 4, connectable to a second output shaft (not shown), as well as a third 5 and a further third or fourth bevel gear 5A, each rotatably arranged about a bevel gear axis 6 of the locking differential device 1.

[0055] Both the first and the second bevel gear 3, 4 can be positively connected to a first or second output shaft.

[0056] Furthermore, the first and second bevel gears 3, 4 each have a hub for a shaft-hub connection. The first and second bevel gears 3, 4 have a splined shaft profile for power transmission to a first and second output shaft, respectively.

[0057] Furthermore, it is evident from the Fig. 1 to 5 indicate that the locking differential device 1 comprises a third and fourth bevel gear 5, 5A, each rotatably arranged about a bevel gear axis 6 of the locking differential device 1.

[0058] In addition, the locking differential device 1 has a bevel gear axle 6, which is non-rotatably connected to the differential basket 2 and is arranged inside the differential basket 2.

[0059] The third and fourth bevel gears 5, 5A are engaged with the first and second bevel gears 3, 4, respectively.

[0060] Furthermore, the Fig. 1 to 5, that the locking differential device 1 comprises a multi-plate clutch 7 for releasably connecting the differential basket 2 and the second bevel gear 4.

[0061] The multi-plate clutch 7 is arranged inside the differential basket 2 and comprises several outer plates 8, several inner plates 9, a pressure plate 10 and a plate carrier 11 for the inner plates 9.

[0062] The inner lamellae 9 are arranged on the lamella carrier 11 in a rotationally fixed and axially displaceable manner in direction A. The connection of the inner lamellae 9 to the lamella carrier 11 is designed such that, in the radial direction R, the inner lamellae 9 are at least partially radially spaced from the lamella carrier 11. This allows axial fluid channels to be created for the conveyance of coolant, thereby improving the supply of coolant to the lamellae located further away from a spray nozzle 17 of the locking differential device 1.

[0063] How particularly good in Fig. 4 and Fig. As can be seen in Figure 5, the lamellar carrier 11 is rotationally fixed and materially bonded and is attached on the outside to the second bevel gear 4.

[0064] According to the Fig. 4 and Fig. 5 the outer lamellae 8, the inner lamellae 9 and the pressure plate 10 are arranged such that when pressure is applied to the pressure plate 10 the outer and inner lamellae 8, 9 are pushed together against the differential basket 2 to form a frictional connection between the differential basket 2 and the second bevel gear 4.

[0065] Furthermore, the Fig. 1, Fig. 4 and Fig. 5, that the locking differential device 1 comprises an actuating mechanism 12 for activating and deactivating the multi-plate clutch 11.

[0066] The actuating mechanism 12 is designed and configured to convert a rotary force into an axial force in order to activate and deactivate the multi-plate clutch 11.

[0067] For this purpose, the locking differential device 1 includes an actuating actuator 13 to control the actuating mechanism 12 (see Fig. 1).

[0068] The actuating mechanism 12 and the lamellar clutch 11 are arranged opposite the axis of rotation of the third and fourth bevel gear 5, 5A or the axis of the bevel gear shaft 6.

[0069] Furthermore, the Fig. 1, Fig. 2 and Fig. 4, Fig. 5, that the locking differential device 1 has a coolant guide 14 which guides coolant from outside the differential basket 2 in a radial direction R inwards to the multi-plate clutch 7 in order to cool it. In other words, the coolant guide 14 is designed and configured to guide coolant through the differential basket 2, or through the outer wall of the differential basket 2, or through the housing of the differential basket 2 in a radial direction R inwards to the multi-plate clutch in order to cool it. Put another way, the coolant guide 14 is designed and configured such that coolant is conveyed inwards in a radial direction R inwards by the rotational movement of the locking differential device 1 without the need for an additional pump or conveying device. In this way, cost-effective and simple manufacturing as well as efficient cooling can be achieved. The coolant guide 14 is mounted on the differential basket 2 in a rotationally fixed manner.

[0070] The coolant guide device 14 is also designed and configured to guide coolant inwards towards the multi-plate clutch 7 by means of the rotational movement of the differential carrier 2 or the rotational movement of the locking differential device 1 in the radial direction R. Thus, a pumping action can be generated by means of the rotational movement of the differential carrier 2, which conveys coolant from radially outside the locking differential device 1 inwards in the radial direction R. Efficient cooling is therefore achievable.

[0071] Fig. Figure 6 shows a sectional view of a coolant guide device 14 of the locking differential device 1. Fig. 1 and Fig. Figure 7 shows a spatial view of the coolant guide device 14. Fig. 1 and Fig. 6.

[0072] According to the Fig. 6 and Fig. 7 and e.g. Fig. 1 The coolant guidance device 14 comprises several guide vanes 15, which are arranged on the outside of the differential basket 2 and radially between the differential basket 2 and a spray nozzle 17 of the locking differential device 1.

[0073] Each guide vane 15 has a thickness that is less than 15 percent of its length and / or height. The guide vanes 15 are manufactured using a machining process. A coolant can thus be applied from a spray nozzle 17 to the guide vanes 15, which then convey it radially inwards in the direction R. This enhances the conveying effect of the coolant guide device 14. Furthermore, the guide vanes 15 act as cooling fins, dissipating heat from the differential basket 2 in addition to guiding the coolant. Consequently, efficient cooling is achieved in this way.

[0074] As in Fig. As can be seen in Figure 6, the coolant guide device 14 has twelve guide vanes 15. The number of guide vanes 15 corresponds to the number of openings 16 of the coolant guide device 14, which provide access from the outer surface of the casing in the radial direction R to the inner surface of the casing in the radial direction R of the coolant guide device 14.

[0075] Furthermore, the number of guide vanes 15 corresponds to the number of passages in the differential basket 2, which provide access from the outside of the differential basket 2 to the inside of the differential basket 2.

[0076] Furthermore, it is assumed that Fig. 6 shows that the guide vanes 15 are spirally shaped to generate a conveying effect in the radial direction R inwards, e.g. when a motor vehicle is moving forward.

[0077] The guide vanes 15 are designed and configured to generate a conveying effect in axial and radial directions A, R, in order to direct coolant from a spray nozzle 17 of the locking differential device 1 towards the multi-plate clutch 7, e.g., during forward travel of a motor vehicle. An axial conveying effect has the advantage of improving the flow of coolant along the multi-plate clutch 7, i.e., in the axial direction of the multi-plate clutch 7.

[0078] Here, each guide vane 15 forms a funnel with an inner ring 18 of the coolant guide device 14, which narrows inwards in the radial direction R. At the narrowest point of the funnel formed, an opening 16 of the coolant guide device 14 is arranged, which provides access in the radial direction R from the outer surface of the coolant guide device 14 to the inner surface of the coolant guide device 14.

[0079] According to the Fig. 6 and Fig. 7 The coolant guide device 14 is designed in an annular or hollow cylindrical form. In other words, the coolant guide device 14 comprises an inner ring 18, the inner surface of which is arranged on the differential basket 2, and the guide vanes 15 of the coolant guide device 14 are arranged on the outer surface of which.

[0080] As already indicated and as in the Fig. 6 and Fig. As can be seen in Figure 7, the coolant guide device 14 has several openings 16. Each opening 16 forms an access in radial direction R from the outer surface of the coolant guide device 14 to the inner surface of the coolant guide device 14 in radial direction R.

[0081] Furthermore, they show Fig. 1 to 3, that the locking differential device 1 includes a spray nozzle 17 for coolant.

[0082] The spray nozzle 17 is arranged, viewed in the axial direction A of the locking differential device 1, between the bevel gear shaft 6 and the multi-plate clutch 7 or the pressure plate 10 of the multi-plate clutch 7. Furthermore, the spray nozzle 17 has a spray angle.

[0083] The spray nozzle 17 or a central axis of the spray nozzle 17, which bisects the spray angle, is inclined in the direction of the multi-plate clutch 7 or in the axial direction A of the locking differential device 1 (cf. Fig. 1).

[0084] The spray nozzle 17 or a central axis of the spray nozzle 17, which bisects the spray angle, is further inclined away from the ideal radial direction R (cf. Fig. 2 and Fig. 3) so that the central axis or the spray nozzle 17 corresponds to an angle of attack of guide vanes 15 of the coolant guide device 14. As a result, when the locking differential device 1 rotates, coolant flows partially or at least temporarily or in phases from the spray nozzle 17 into an opening 16 of the coolant guide device 14, which provides access to the multi-plate clutch 7.

[0085] Furthermore, according to the Fig. 1 to 3 The spray nozzle 17 or a central axis of the spray nozzle 17, which bisects the spray angle, is aligned such that at least one spatial component is oriented in the direction of gravity in order to act in addition to the coolant pressure, e.g., against the blade direction of the guide vanes 15. This allows the available kinetic energy to be increased and thus a greater conveying effect to be achieved. Reference symbol list 1 Locking differential device 2 Differential basket 3 first bevel gear 4 second bevel gear 5 third bevel gear 5A fourth bevel gear 6 bevel gear axle 7-plate clutch 8 outer slats 9 inner slats 10 printing plate 11 lamella carriers 12 Actuation mechanism 13 Actuator 14 Coolant guide system 15 guide vanes 16 openings 17 Spray nozzle 18 inner ring A axial direction R radial direction

Claims

[1] comprising a locking differential device (1) for a motor vehicle: - a differential basket (2) in which at least three bevel gears (3, 4, 5, 5A) are arranged, - a first bevel gear (3), connectable to a first output shaft, - a second bevel gear (4), connectable to a second output shaft, - at least a third bevel gear (5, 5A), rotatably arranged about a bevel gear axis (6) of the locking differential device (1), - a bevel gear axle (6), arranged in a rotationally fixed manner with the differential basket (2), - wherein at least one third bevel gear (5, 5A) is engaged or meshes with the first and second bevel gears (3, 4), and - a coupling (7) for detachably connecting the differential basket (2) and the second bevel gear (4), characterized by, that the locking differential device (1) has a coolant guide device (14) which guides coolant from outside the differential basket (2) in a radial direction (R) inwards to the clutch (7) in order to cool it. [2] Locking differential device according to claim 1, - wherein the coolant guide device (14) is configured and designed to guide coolant inwards to the clutch (7) by the rotational movement of the differential basket (2) or by the rotational movement of the locking differential device (1) in a radial direction (R). [3] Locking differential device according to claim 1 or 2, - wherein the coolant guidance device (14) comprises several guide vanes (15) arranged on the outside of the differential basket (2) and / or radially between the differential basket (2) and a spray nozzle (17) of the locking differential device (1), and / or - wherein the number of guide vanes (15) corresponds to the number of passages in the differential basket (2) which provide access from the outside of the differential basket (2) to the inside of the differential basket (2). [4] Locking differential device according to one of the preceding claims, - wherein the coolant guidance device (14) comprises several guide vanes (15) which are arranged on the outside of the differential basket (2) and / or radially between the differential basket (2) and a spray nozzle (17) of the locking differential device (1), - wherein the guide vanes (15) are spirally shaped to generate a conveying action in a radial direction (R) inwards, and / or - wherein the guide vanes (15) are arranged and designed to generate a conveying effect in the axial and / or radial direction (A, R) to direct coolant from a spray nozzle (17) of the locking differential device (1) towards the clutch (7). [5] Locking differential device according to one of claims 3 or 4, - wherein each guide vane (15) forms a funnel with an inner ring (18) of the coolant guide device (14), which narrows inwards in a radial direction (R), - wherein an opening (16) of the coolant guide device (14) is arranged at the narrowest point of the funnel formed, which provides access in the radial direction (R) from the outer surface of the coolant guide device (14) to the inner surface of the coolant guide device (14) in the radial direction (R). [6] Locking differential device according to one of the preceding claims, - wherein the coolant guide device (14) is designed in an annular and / or hollow cylindrical form, - wherein the coolant guide device (14) comprises an inner ring (18) which is arranged with its inner cylindrical surface on the differential basket (2), and / or - wherein the coolant guidance device (14) comprises an inner ring (18) on the outer surface of which guide vanes (15) of the coolant guidance device (14) are arranged, [7] Locking differential device according to one of the preceding claims, - wherein the coolant guide device (14) comprises several openings (16), - wherein each opening (16) in radial direction (R) forms an access from the outer surface of the outer shell in radial direction (R) to the inner surface of the coolant guide device (14) in radial direction (R). [8] Locking differential device according to one of the preceding claims, - wherein the locking differential device (1) comprises a spray nozzle (17) for coolant, - wherein the spray nozzle (17), viewed in the axial direction (A) of the locking differential device (1), is arranged between the bevel gear shaft (6) and the clutch (7) or the pressure plate (10) of the clutch (7). [9] Locking differential device according to claim 8, - wherein the spray nozzle (17) or a central axis of the spray nozzle (17), which bisects the spray angle, is inclined towards the coupling (7), and / or - wherein the spray nozzle (17) or a central axis of the spray nozzle (17), which bisects the spray angle, is inclined away from the ideal radial direction (R), such that the central axis or the spray nozzle (17) corresponds to an angle of attack of guide vanes (15) of the coolant guide device (14), whereby, when the locking differential device (1) rotates, coolant is partially and / or at least temporarily and / or intermittently supplied from the spray nozzle (17) into an opening (16) of the coolant guide device (14), which provides access to the clutch (7). [10] Locking differential device according to one of claims 8 or 9, - wherein the spray nozzle (17) or a central axis of the spray nozzle (17), which bisects the spray angle, is oriented such that at least one spatial component is oriented in the direction of gravity in order to act in addition to the coolant pressure, e.g. against the blade direction of the guide vanes (15), which increases the available kinetic energy and thus results in a greater conveying effect.

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