Differential gear for a driven vehicle axle, axially fixed clutch part, differential cover and vehicle axle

Abstract

Differential gear (1) for a driven vehicle axle, the differential gear (1) comprising a differential carrier (2), a first axle gear (3), a first axial bearing associated with the first axle gear (3), a second axle gear (4), a second axial bearing associated with the second axle gear (4), and at least one compensating gear (5), wherein the differential gear (1) comprises a first bearing element forming the first axial bearing and a second bearing element forming the second axial bearing, wherein the first bearing element and the second bearing element are each structurally separate from the differential carrier (2) and are detachably connected to the differential carrier (2) in an axially defined position, axially fixed coupling part (9) for a differential lock of a differential gear (1), wherein the coupling part (9) is designed and / or can be arranged to form a first bearing element of such a differential gear (1),Differential cover (7) for a differential gear (1), wherein the differential cover (7) is designed and / or can be arranged to form a second bearing element of such a differential gear (1), and driven vehicle axle, wherein the vehicle axle has such a differential gear (1).

Description

The invention relates to a differential gear for a driven vehicle axle, the differential gear having a differential cage, a first final drive gear, a first axial bearing point assigned to the first final drive gear, a second final drive gear, a second axial bearing point assigned to the second final drive gear, and at least one differential gear. The invention also relates to an axially fixed coupling part. The invention also relates to a differential cover. The invention also relates to a driven vehicle axle.Document US 2006 / 0278036 A1 relates to a differential housing for holding a differential mechanism having a pair of axle shafts and a plurality of gearwheels. To enable replacement of one or more gears without having to replace the entire differential case, it is proposed in US 2006 / 0278036 A1 that the differential case comprises: an annular wall circumscribing an axle and exposed at an open end for receiving one of the axle shafts, and an open front opposite the open end; a cover attachable to the annular wall at the open front and defining a space for retaining the differential mechanism therein; and a locking device extending circumferentially around the annular wall at the open front and being elastically deformed between a tensioned position and a relaxed position to releasably connect the cover to the annular wall to releasably retain the differential mechanism in the space.From document US 2018 / 0149252 A1 a continuously variable differential transmission is known, comprising: a pair of rotating bevel gears engaged with each other via a pinion, each of the bevel gears having a first working surface; and an actuator having opposite ends having a pair of interconnected fluid reservoirs, the actuator comprising a pair of secondary operating surfaces, the pair of rotating bevel gears and the pinion being housed in the actuator such that the first operating surfaces of the bevel gears and the secondary operating surfaces of the actuator are cooperatively engaged, wherein relative rotation between the pair of bevel gears imparts a linear motion to the actuator to vary the pressure between the pair of interconnected fluid reservoirs to resist linear motion of the actuator and to variably damp relative motion of the bevel gears to each other.From document DE 10 2022 001 304 A a differential gear is known, having an input side rotatable about an axis of rotation, which input side has a rotary driving contour for the rotary driving engagement with a drive wheel and at least one differential gear rotatable about a compensation axis, and an output side rotatable about the axis of rotation, which output side has a first axle gear and a second axle gear which are in rotary driving engagement with the at least one differential gear. The input side has a rotary entrainment section, on which the rotary entrainment contour is provided, and a support section, on which the at least one compensating wheel is arranged. The rotary driving section and the supporting section can be selectively brought into rotary driving connection with one another by means of a switchable ratchet freewheel.The object of the invention is to improve a differential gear mentioned at the beginning structurally and / or functionally. In addition, the object of the invention is to improve a vehicle axle mentioned at the beginning in a structural and / or functional manner.The object is achieved with a differential gear having the features of claim 1. In addition, the object is achieved with a coupling part having the features of claim 5. In addition, the object is achieved with a differential cover having the features of claim 6.The differential gear is configured for placement and / or use in a driven vehicle axle. In this respect, the differential gear can also be referred to as an axle differential. The differential gear can be designed and / or arrangeable for arrangement in a vehicle axle, in particular in a housing section of an axle body. The differential may be configured and / or arrangeable to balance speeds between a first axle shaft and a second axle shaft.The differential gear has a differential cage, a first final gear, a second final gear and at least one differential gear. The differential gear may include a drive gear. The drive gear can be connected to the differential cage in a fixed manner, in particular in a rotationally fixed and axially fixed manner. The first axle gear and the second axle gear can be rotatably mounted on the differential carrier. The differential gear may include a differential gear carrier. The at least one differential gear can be rotatably mounted on the differential carrier, in particular on the differential gear carrier. The first final gear and the second final gear may be connected to each other to balance rotational speeds. The first final gear and the second final gear may be connected to each other using the at least one differential gear. The at least one pinion gear may be meshed with both the first drive gear and the second drive gear. The drive gearwheel, the at least one axial gearwheel and / or the at least one differential gearwheel can / can be designed as a bevel gear.The differential gear may have a drive axis and an output axis. Unless stated otherwise or unless otherwise evident from the context, the terms "axial" refer to a direction of extent of the output axle. The drive axis and the output axis can be arranged at least approximately at right angles to one another. The drive axis and the output axis can intersect or be arranged skew to one another. The drive gear may be arranged coaxially to the drive axis. The first axle gear and the second axle gear may be arranged coaxially with the output axle.The differential gear has a first axial bearing point assigned to the first axial gear and a second axial bearing point assigned to the second axial gear. The first thrust bearing location may be configured and / or arranged to axially fix the first final gear with respect to the differential carrier. The second thrust bearing point may be configured and / or arranged to axially fix the second final gear with respect to the differential carrier.The differential gear has a first bearing element forming or having the first axial bearing point and a second bearing element forming or having the second axial bearing point. The first bearing element and the second bearing element are each produced structurally separately from the differential cage and are connected to the differential cage in a axially position-defined, detachable manner. The first bearing element can first be produced separately from the differential carrier and subsequently connected to the differential carrier. The second bearing element can first be produced separately from the differential carrier and subsequently connected to the differential carrier. The first axial bearing point can thus have an axially defined position with respect to the differential cage. The second axial bearing point can thus have an axially defined position with respect to the differential cage. In the present case, a detachable connection is in particular a mountable and / or removable connection which can be detached again without damage or destruction of the differential cage, of the first bearing element and / or of the second bearing element. The first bearing element, the first axle gear, the differential gear carrier, the second axle gear and / or the second bearing element can be inserted or inserted into the differential cage, fixed in an axially positionally defined manner and / or secured in a releasable manner.The differential gear may have a differential lock. In this respect, the differential gear can also be referred to as a locking differential. The differential lock may be configured and / or arranged to lock the differential gear. The differential lock may include a first clutch part. The first coupling part can be an axially fixed coupling part. The first coupling part can be assigned to the differential cage. The first coupling part can be axially fixed to the differential cage. The first clutch part can be connected to the differential cage in a rotationally fixed manner. The differential lock may include a second clutch part. The second coupling part can be an axially displaceable coupling part.The second coupling part can be displaceable under the action of an actuating force. The second clutch part can be associated with an axle shaft of a vehicle axle. The second coupling part can be guided axially displaceably on an axle shaft of a vehicle axle. The second clutch part can be connected to an axle shaft of a vehicle axle in a rotationally fixed manner. The coupling parts can have mutually corresponding tooth arrangements. The tooth arrangements can be arranged on the coupling parts axially on the front or plane side. The tooth arrangements can be arranged on the coupling parts radially on the inside and / or on the outside. The first coupling part and the second coupling part can form a switchable and / or form-fitting coupling. The clutch can be designed as a claw clutch. The clutch may have a clutch axis. The clutch axis can be arranged coaxially with respect to the output axis.The second coupling part can be displaceable between a first switching position and a second switching position. The clutch can thus be shifted between a first shift position and a second shift position. In the first switching position, the toothing of the first coupling part and the toothing of the second coupling part can be disengaged. In the second switching position, the toothing of the first coupling part and the toothing of the second coupling part can be engaged with one another. In the first shift position, the clutch can be opened, a transmission of torque between the first clutch part and the second clutch part prevented, and / or the differential lock can be deactivated. In the second shift position, the clutch can be closed, a torque transmission between the first clutch part and the second clutch part is made possible, and / or the differential lock can be activated.The first bearing element can be formed with the aid of the axially fixed coupling part. The following description relates to the axially fixed coupling part. Unless otherwise stated or unless otherwise evident from the context, "coupling part" refers to the "axially fixed coupling part". The differential cage and the coupling part can be connected to one another in an axially positive-locking manner. The coupling part can be supported axially on the differential cage. The differential cage and the coupling part can have corresponding axial contact surfaces. The differential cage and the coupling part can have corresponding radial contact surfaces. The clutch part can bear with its axial contact surface against the axial contact surface of the differential cage and can bear with its radial contact surface against the radial contact surface of the differential cage and / or be centered. The coupling part can be inserted or inserted axially into the differential cage. The differential cage can have an inner ring section assigned to the coupling part. The axial contact surface and / or the radial contact surface of the differential cage can / can be arranged on the inner ring section assigned to the coupling part.The differential gear may include a differential cover. The second bearing element may be formed by the differential cover. The differential cover can be connected to the differential cage in an axially force-fit and / or form-fit manner. The differential cover can be axially secured in position on the differential cage. The differential cover can be axially mountable and / or removably secured to the differential cage. The differential cage and the differential cover can have corresponding radial contact surfaces. The differential cage can have an inner ring section assigned to the differential cover. The radial contact surface of the differential cage can be arranged on the inner ring section assigned to the differential cover. The differential cover can bear with its radial contact surface against the radial contact surface of the differential cage and / or be centered. The differential cover may be secured to the differential carrier by a retaining ring. The differential cage can have an annular groove for a securing ring. The annular groove can be arranged on the inner ring section assigned to the differential cover. The differential cage and the differential cover can have corresponding axial contact surfaces. The axial contact surface of the differential cage can be arranged on the inner ring section assigned to the differential cover. The differential cover can bear with its axial contact surface against the axial contact surface of the differential cage and / or be centered. The differential cover can be screwed to the differential cage. The differential cage and the differential cover can have corresponding threads. The differential cage and the differential cover may have corresponding screw holes. The differential cage can have at least one threaded hole. The differential cage can have a plurality of circumferentially arranged threaded holes. The at least one threaded hole may be disposed in the inner ring portion.The differential gear can have a first axial bearing. The first axial bearing may be arranged and / or effective between the first axle gear and the first bearing element. The first axial bearing can be formed with the aid of a thrust washer. The first axial bearing can be formed with the aid of a contact surface of the first axial gearwheel and / or a contact surface of the first bearing element. The differential gear may have a second axial bearing. The second axial bearing can be arranged and / or effective between the second axial gearwheel and the second bearing element. The second axial bearing can be formed with the aid of a thrust washer. The second axial bearing can be formed with the aid of a contact surface of the second axial gearwheel and / or a contact surface of the second bearing element.The axially fixed coupling part is designed and / or arrangeable to form a first bearing element of a differential gear according to the invention. The clutch part is structurally separate from the differential cage of a differential transmission. The coupling part is designed for axially positionally defined releasable connection to a differential cage of a differential transmission. The coupling part can be designed for axially positive connection to a differential cage of a differential transmission. The coupling part can be designed for axial support on a differential cage. The clutch part can be designed for axially fixed and / or rotationally fixed connection to a differential cage of a differential transmission. The coupling part can be designed to be inserted axially into a differential cage of a differential transmission.The coupling part can have a hollow cylindrical and / or ring-like shape. The coupling part may have a first axial end and a second axial end. The first end may be associated with a first final gear of a differential. The coupling part can have an axial contact surface which is designed and / or arranged to bear against an axial contact surface of a differential cage. The coupling part can have a radial contact surface which is designed and / or arranged to contact a radial contact surface of a differential carrier and / or to center the coupling part on a radial contact surface of a differential carrier. The coupling part may have an outer ring portion. The axial contact surface and / or the radial contact surface of the coupling part can / can be arranged on the outer ring section.The coupling part can be designed and / or arrangeable as a first coupling part of a coupling of a differential lock. The coupling part can have a toothing which corresponds to an axially displaceable second coupling part of the coupling. The toothing may be arranged at the second end. The toothing can be arranged on the coupling part axially on the front or planar side. The toothing can be designed as a claw toothing. The toothing can be arranged on the clutch part radially on the outside.The differential cover is designed and / or arrangeable to form a second bearing element of a differential transmission according to the invention. The differential cover is structurally separate from the differential cage of a differential transmission. The differential cover is designed for axially positionally defined releasable connection to a differential cage of a differential transmission. The differential cover can be designed for axially frictional and / or positive connection to a differential cage of a differential transmission. The differential cover can be designed to be axially secured in position on a differential cage of a differential transmission. The differential cover can be designed to be axially mounted and / or removably secured to a differential cage of a differential transmission. The differential cover may be configured to be secured to the differential carrier by a snap ring.The differential cover may be configured and / or arrangeable to axially close a differential cage. The differential cover can be designed and / or arrangeable for axially fixing a first bearing element, a first final drive gear, a differential gear carrier and / or a second final drive gear of a differential gear to a differential cage of the differential gear. The differential cover can be associated with a second axle gear of a differential gear.The differential cover may have an axial contact surface. The axial contact surface can be designed and / or arranged to cooperate with a securing ring. The axial contact surface can be designed and / or arranged to bear against an axial contact surface of a differential cage. The differential cover, in particular the outer ring section, can have at least one through hole. The at least one through hole can be designed and / or arranged to receive a connection screw, in particular a shank of a connection screw. The differential cover may have a radial contact surface which is designed and / or arranged to contact a radial contact surface of a differential carrier and / or to center the differential cover on a radial contact surface of a differential carrier. The differential cover may include an outer ring portion. The axial contact surface and / or the radial contact surface of the differential cover can / can be arranged on the outer ring section.The driven vehicle axle has the differential gear according to the invention. The vehicle axle can be designed for arrangement and / or use in a motor vehicle, in particular in a passenger car, a motor bus, a heavy goods vehicle, a agricultural or federal traction machine, a self-propelled working machine, such as a construction machine, or another motor vehicle, such as an industrial truck. The vehicle axle may be configured and / or arrangeable to connect a vehicle body and vehicle wheels to each other. The vehicle axle is driven. The vehicle axle can be designed and / or arrangeable for transmitting a drive power from a traction drive machine to vehicle drive wheels. The vehicle axle may have an axle body. The axle body may have a housing portion. The differential gear can be accommodated and / or arranged in the housing section. The axle body may include a first axle tube portion and a second axle tube portion. The first axle tube portion and the second axle tube portion may be disposed on opposite sides of the housing portion. The vehicle axle may include a first axle shaft and a second axle shaft. The first axle shaft can be arranged in the first axle tube section and / or rotatably mounted. The second axle shaft can be arranged in the second axle tube section and / or rotatably mounted. The axle shafts may be configured and / or arranged to transmit drive power from the differential to at least one vehicle drive wheel. The first axle gear of the differential gear can be connected fixedly, in particular fixedly and axially fixedly, to the first axle shaft of the vehicle axle. The second axle gear of the differential gear can be connected fixedly, in particular fixedly and axially fixedly, to the second axle shaft of the vehicle axle. The vehicle axle can have at least one differential bearing for rotatably mounting the differential cage on the axle body, in particular on the housing section of the axle body.Summarizing and in other words illustrated, the invention thus results inter alia in a service-optimized differential gear. The differential can be a lockable bevel gear differential. In the region of the two axial thrust washers, separate components, a differential cover and a coupling part designed as a claw sleeve, are inserted into the differential cage, against which the axial thrust washers and the axle bevel gears can then abut. The components can be inserted into the differential cage and axially secured in position via a securing ring (thrust washer on the differential cover side) or a shaft shoulder / bearing shoulder (thrust washer on the coupling part side). Other connection possibilities are also conceivable, for example, threads.The invention reduces effort, such as assembly effort and / or costs. A separate exchange of the bearing elements and a further use of the remaining differential gear parts are made possible. A life of the overall differential gear is increased.An exemplary embodiment of the invention is described in more detail below with reference to a figure, wherein: FIG. 1 shows a sectional view of a differential gear with two bearing elements which are structurally separate from a differential cage and are connected to the differential cage in a axially position-defined and releasable manner.FIG. 1 shows a sectional view of a differential gear 1 for a driven vehicle axle. The differential gear 1 has a differential cage 2, a first final gearwheel 3 designed as a bevel gear, a second final gearwheel 4 designed as a bevel gear, differential gearwheels 5 designed as bevel gears, a differential gear carrier 6, a differential lock and a differential cover 7. The final gears 3, 4 are arranged coaxially with an output axle 8 of the differential gear 1. The first axle gearwheel 3 is rotatably mounted on the differential carrier 3 and is connected in a rotationally fixed and axially fixed manner to a first axle shaft, which is not illustrated here. The second axle gear 4 is rotatably mounted on the differential carrier 3 and is connected in a rotationally fixed and axially fixed manner to a second axle shaft, not shown here. The differential gears are rotatably mounted on the differential carrier 2 by means of the differential gear carrier 6. The compensating gears 5 are each meshed with both the first spur gear 3 and the second spur gear 4 to enable speed compensation between the axle shafts. The differential lock has an axially fixed first coupling part 9 and an axially displaceable second coupling part, not shown here. The first coupling part 9 and the second coupling part form a switchable form-fitting coupling.The differential gear 1 has a first axial bearing point assigned to the first final drive gear 3 and a second axial bearing point assigned to the second final drive gear 4. The first axial bearing point serves to axially fix the first axial gearwheel 3 with respect to the differential cage 2 and is formed as a first bearing element with the aid of the coupling part 9. Between the first axial gearwheel 3 and the coupling part 9, a thrust washer 10 is arranged as a first axial bearing. The second axial bearing serves to axially fix the second axial gearwheel 4 with respect to the differential cage 2 and is formed as a second bearing element with the aid of the differential cover 7. Between the second axle gear 4 and the differential cover 7, a thrust washer 11 is arranged as a second axial bearing.The differential cage 2 has an inner ring section 12 assigned to the coupling part 9 with an axial contact surface and a radial contact surface for the coupling part 9, and an inner ring section 13 assigned to the differential cover 7 with a radial contact surface for the differential cover 7. The coupling part 9 has an outer ring section 14 corresponding to the inner ring section 12 with an axial contact surface and a radial contact surface. The differential cover 7 has an outer ring portion 15 corresponding to the inner ring portion 13 and having a radial contact surface.The coupling part 9, the thrust washer 10, the first axial gearwheel 3, the differential gearwheel carrier 6, the second axial gearwheel 4, the thrust washer 11 and the differential cover 7 are successively inserted axially into the differential cage 2, wherein the coupling part 9 bears axially with its outer ring section 14 against the inner ring section 12 and is radially centred, and the differential cover 7 is radially centred with its outer ring section 15 against the inner ring section 13. The assembly of coupling part 9, thrust washer 10, first axial gearwheel 3, differential gearwheel carrier 6, second axial gearwheel 4, thrust washer 11 and differential cover 7 is supported axially in a positionally defined manner on the axial contact surface of the inner ring section 12 and is releasably secured by means of a securing ring 16 which is arranged in an annular groove arranged on the inner ring section 13 of the differential cage 2.If necessary, the components which are structurally separately produced from the differential carrier 2 and are detachably connected to the differential carrier 2, in particular the coupling part 9, the thrust washer 10, the thrust washer 11 and / or the differential cover 7, can be replaced and the further components of the differential gear 1 can be used further.Reference numerals denote reference numerals1 Differential gear 2 Differential cage 3 First axial gearwheel 4 Second axial gearwheel 5 Differential gearwheel 6 Differential gearwheel carrier 7 Differential cover 8 Output axle 9 Coupling part 10 Thrust washer 11 Thrust washer 12 Inner ring portion 13 Inner ring portion 14 Outer ring portion 15 Outer ring portion

Claims

Differential gear (1) for a driven vehicle axle, the differential gear (1) having a differential cage (2), a first axle gearwheel (3), a first axial bearing point assigned to the first axle gearwheel (3), a second axle gearwheel (4), a second axial bearing point assigned to the second axle gearwheel (4) and at least one differential gearwheel (5), characterized in that the differential gear (1) has a first bearing element forming the first axial bearing point and a second bearing element forming the second axial bearing point, wherein the first bearing element and the second bearing element are each produced structurally separately from the differential cage (2) and are connected to the differential cage (2) in a releasable manner in an axially positionally defined manner, wherein the differential cage (2) and the coupling part (9) have corresponding axial contact surfaces and the coupling part (9) bears with its contact surface against the contact surface of the differential cage (2), wherein the differential gear (1) has a differential cover (7) and the second bearing element is formed with the aid of the differential cover (7), wherein the differential cover (7) is axially secured in position on the differential cage (2) with the aid of a securing ring (16), wherein the coupling part (9), the thrust washer (10), the first spur gear (3), the differential gear carrier (6), the second spur gear (4), the thrust washer (11) and the differential cover (7) are successively axially inserted into the differential cage (2) and are releasably secured with the aid of a securing ring (16) which is arranged in an annular groove arranged on an inner ring section (13) of the differential cage (2).Differential gear (1) according to Claim 1, characterized in that the differential gear (1) has a differential lock with an axially fixed coupling part (9), and the first bearing element is formed with the aid of the coupling part (9).Differential gear (1) according to Claim 2, characterized in that the coupling part (9) is axially supported on the differential cage (2).Differential gear (1) according to at least one of the preceding claims, characterized in that the differential gear (1) has a first axial bearing which is effective between the first spur gear (3) and the first bearing element and a second axial bearing which is effective between the second spur gear (4) and the second bearing element, and the first axial bearing and / or the second axial bearing are / is formed with the aid of a thrust washer (10, 11).Axially fixed coupling part (9) for a differential lock of a differential transmission (1), characterized in that the coupling part (9) is designed and / or arrangeable to form a first bearing element of a differential transmission (1) according to at least one of Claims 1 to 4.Differential cover (7) for a differential transmission (1), characterized in that the differential cover (7) is designed and / or arrangeable to form a second bearing element of a differential transmission (1) according to at least one of Claims 1 to 4.Driven vehicle axle, characterized in that the vehicle axle has a differential gear (1) according to at least one of Claims 1 to 4.

Images