Differential lock, differential gear and vehicle axle

Abstract

Differential lock for a differential gear, the differential lock comprising an axially fixed first clutch part (7) and a second clutch part (8) which is axially displaceable between a first switching position and a second switching position, wherein the clutch parts (7, 8) each have a first toothing (12, 15) and at least one further toothing (14, 17) for transmitting a torque, wherein the toothings (12, 14, 15, 17) are disengaged in the first switching position and engaged with one another in the second switching position, differential gear for a driven vehicle axle, wherein the differential gear has such a differential lock, and driven vehicle axle, wherein the vehicle axle has such a differential gear.

Description

[0001] The invention relates to a differential lock for a differential gear, the differential lock comprising an axially fixed first clutch part and a second clutch part axially displaceable between a first shift position and a second shift position. Furthermore, the invention relates to a differential gear for a driven vehicle axle. Furthermore, the invention relates to a driven vehicle axle.

[0002] Document CN 113883252 A relates to a differential lock comprising an electromagnetic device and a locking device, wherein the locking device is movable in the axial direction and can be switched between a locking position and an unlocking position.The electromagnetic device includes an electromagnetic generating member and a magnetically conductive member. The electromagnetic generating member can be electrified to generate a magnetic field. The magnetically conductive member is disposed in the magnetic field generated by the electromagnetic generating member. One side of the magnetically conductive member is fixed to the axial end of the locking device. The other side of the magnetically conductive member is adjacent to a limiting member to achieve axial limitation. The fixing surface is a wave-shaped curved surface. The locking device can drive the magnetically conductive member to rotate synchronously. The magnetically conductive member can generate a speed difference with the locking device under the action of the electromagnetic force to push the locking device to move in the axial direction.

[0003] The invention is based on the object of structurally and / or functionally improving a differential lock mentioned above. Furthermore, the invention is based on the object of structurally and / or functionally improving a differential gear mentioned above. Furthermore, the invention is based on the object of structurally and / or functionally improving a vehicle axle mentioned above.

[0004] The object is achieved by a differential lock having the features of claim 1. Furthermore, the object is achieved by a differential gear having the features of claim 9. Furthermore, the object is achieved by a vehicle axle having the features of claim 11. Advantageous embodiments and / or further developments are the subject of the subclaims.

[0005] The differential lock is designed and / or can be arranged to lock a differential gear. The differential lock has a first coupling part and a second coupling part. The first coupling part and the second coupling part can be arranged coaxially with each other and / or with a coupling axis.

[0006] The first clutch part is axially fixed. In this context, "axial" refers in particular to a direction of extension of the clutch axis. The first clutch part can be designed for axially fixed arrangement with respect to a base of a differential gear, in particular with respect to a differential carrier. The first clutch part can be designed and / or arrangeable for fixed connection, in particular for a rotationally fixed and axially fixed connection, to a base of a differential gear, in particular to a differential carrier.

[0007] The second coupling part is axially displaceable. In this context, "axial" refers in particular to a direction of extension of the coupling axis. The second coupling part can be displaceable relative to the first coupling part. The second coupling part can be designed for an axially displaceable arrangement relative to the first coupling part. The second coupling part can be designed for an axially displaceable arrangement relative to a base of a differential gear, in particular relative to a differential carrier. The second coupling part can be designed and / or arrangeable for an axially displaceable connection, in particular for a rotationally fixed and axially displaceable connection, to an axle shaft of a vehicle axle, in particular to a first axle shaft of a vehicle axle.

[0008] The coupling parts each have a first toothing and at least one further toothing. The first coupling part has a first toothing and at least one further toothing. The second coupling part has a first toothing and at least one further toothing. The first toothing of the first coupling part and the first toothing of the second coupling part can be assigned to one another. The at least one further toothing of the first coupling part and the at least one further toothing of the second coupling part can be assigned to one another. The toothings are designed and / or arranged to transmit a torque. The coupling parts can each have a first toothing and a second toothing. The first coupling part can have a first toothing and a second toothing. The second coupling part can have a first toothing and a second toothing.The coupling parts can each have a first toothing, a second toothing and a third toothing.

[0009] The second clutch part can be moved between a first switching position and a second switching position. In the first switching position, the teeth of the first clutch part and the teeth of the second clutch part are disengaged. In the second switching position, the teeth of the first clutch part and the teeth of the second clutch part are engaged with one another. The first clutch part and the second clutch part can form a switchable and / or positive-locking clutch or can be parts of a switchable and / or positive-locking clutch. By moving the second clutch part between the first switching position and the second switching position, the clutch can be switchable between a first switching position and a second switching position. In the first switching position, the clutch can be disengaged and torque transmission between the first clutch part and the second clutch part can be prevented.In the second switching position, the clutch can be closed, allowing torque transmission between the first clutch part and the second clutch part. The gears can be designed and / or arranged to switch the clutch between the first switching position and the second switching position.

[0010] The first toothing and the at least one further toothing can each be arranged axially one after the other. A toothing-free intermediate section can be arranged between the first toothing and the at least one further toothing. The coupling parts can each have a toothing-free intermediate section between the first toothing and the at least one further toothing. The first coupling part can have a toothing-free intermediate section between the first toothing and the at least one further toothing. The second coupling part can have a toothing-free intermediate section between the first toothing and the at least one further toothing.

[0011] The tooth-free intermediate sections can each be designed and / or arranged to expose a toothing of the respective other coupling part. A tooth-free intermediate section of the first coupling part can be designed and / or arranged to expose a toothing of the second coupling part. A tooth-free intermediate section of the second coupling part can be designed and / or arranged to expose a toothing of the first coupling part.

[0012] One of the toothings can be designed and / or arranged as a guide toothing for earlier engagement when the second clutch part is moved towards the second switching position. When the second clutch part is moved towards the second switching position, the guide toothing can engage first. The remaining toothing(s) can then engage. The first toothing or another toothing can be designed and / or arranged as a guide toothing. A toothing of the first clutch part and / or a toothing of the second clutch part can be designed and / or arranged as a guide toothing.

[0013] At least one of the toothings can have an engagement profile. The engagement profile can be designed and / or arranged to facilitate engagement between a toothing of the first clutch part and a toothing of the second clutch part when the second clutch part is moved in the direction of the second switching position. The engagement profile can be arranged on the at least one toothing and / or axially on the end face. The engagement profile can be arranged on a side of the first clutch part facing the second clutch part. The engagement profile can be arranged on a side of the second clutch part facing the first clutch part. The engagement profile can have bevels and / or radii that support engagement. The bevels and / or radii can be arranged on teeth of the at least one toothing.The first toothing, the at least one further toothing, and / or the guide toothing can have a meshing profile. At least one toothing of the first coupling part and / or at least one toothing of the second coupling part can have a meshing profile.

[0014] At least one toothing of the first coupling part can be designed as a hub profile. At least one toothing of the second coupling part can be designed as a shaft profile. At least one toothing of the first coupling part can be designed as a shaft profile. At least one toothing of the second coupling part can be designed as a hub profile. The shaft profile and the hub profile can be designed and / or arranged to form a switchable shaft-hub connection. The shaft profile and the hub profile can be designed according to or similar to DIN standard 5480. The toothings of the first coupling part can be designed as hub profiles. The toothings of the second coupling part can be designed as shaft profiles.

[0015] The first clutch part can be assigned to a differential carrier of a differential gear. The first clutch part can be designed and / or arranged for a fixed connection, in particular for a rotationally fixed and axially fixed connection, to a differential carrier of a differential gear. The first clutch part can be designed and / or arranged for a positive, non-positive and / or materially bonded connection to a differential carrier of a differential gear. The first clutch part can have a connecting section for connection to a differential carrier of a differential gear. The connecting section can be arranged axially on the end face of the first clutch part. The connecting section can be arranged on a side of the first clutch part facing away from the second clutch part. The connecting section can be stepped with at least one axial and at least one radial connecting surface.The first clutch part can be made integrally connected to a differential carrier of a differential gear.

[0016] The second coupling part can be assigned to an axle shaft of a driven vehicle axle. The second coupling part can be designed and / or arranged for connection, in particular for a rotationally fixed and axially displaceable connection, to an axle shaft of a vehicle axle. The second coupling part can have a connecting portion for connection to an axle shaft of a driven vehicle axle. The connecting portion can be arranged radially on the inside of the second coupling part. The connecting portion can have a hub toothing or be formed with the aid of a hub toothing.

[0017] The second clutch part can have a stop section. The stop section can be arranged axially on the end face of the second clutch part. The stop section can be arranged on a side of the second clutch part facing away from a transmission element, in particular from an annular piston. The stop section can be formed by means of an axial surface. The second clutch part can be designed to be axially flat on the end face in order to form the stop section. The stop section can be designed and / or arranged to interact with an end stop, in particular with an end stop arranged or formed on a differential carrier of a differential gear.

[0018] The second clutch part can be stepped radially on the outside. The second clutch part can have a bearing section. The bearing section can be formed using an axial surface of the second clutch part and / or arranged radially on the outside of the second clutch part. The bearing section can be arranged on a side of the second clutch part facing a transmission element, in particular an annular piston. The bearing section can be stepped with an axial and a radial connecting surface. The bearing section can be designed and / or arranged to axially support a bearing.

[0019] The second clutch part can be stepped radially on the inside. The second clutch part can have a support section. The support section can be designed and / or arranged to axially support a spring, in particular a helical compression spring. The second clutch part can have a guide section. The guide section can be designed and / or arranged to guide a spring, in particular a helical compression spring. The support section and / or the guide section can be formed using a recess. The recess can have an annular shape. The recess can be axially open on one side. The recess can be open towards a differential gear. The recess can be open radially inward. The support section can be formed using an axial surface delimiting the recess. The guide section can be formed using a radial surface delimiting the recess.

[0020] The bearing section can be formed by means of an axial surface of the second clutch part and / or arranged radially on the outside of the second clutch part. The bearing section can be arranged on a side of the second clutch part facing a transmission element, in particular an annular piston. The bearing section can be stepped with an axial and a radial connecting surface. The bearing section can be designed and / or arranged to axially support a bearing.

[0021] The differential lock can have a transmission element for transmitting an actuating force to the second clutch part. The transmission element can be designed and / or arranged to transmit a hydraulic or pneumatic actuating force. The transmission element can be designed as an annular piston. The transmission element can be arranged coaxially to the second clutch part and / or to the clutch axis. The transmission element can be stepped radially on the inside. The transmission element can have a bearing section. The bearing section can be formed using an axial surface of the transmission element and / or arranged radially on the inside of the transmission element. The bearing section can be designed and / or arranged to axially support a bearing. The differential lock can have a bearing. The bearing can be arranged and / or act between the second clutch part and the transmission element.The bearing can be supported on the one hand on the bearing portion of the second coupling part and on the other hand on the bearing portion of the transmission element. The bearing can be designed as an axial bearing.

[0022] The annular piston can be stepped radially on the outside. The annular piston can be stepped with a stop section and at least one guide section. The stop section can be formed by means of an axial surface of the annular piston and / or arranged radially on the outside of the annular piston. The axial surface can face away from the first clutch part. The stop section can be designed and / or arranged to interact with an end stop, in particular with an end stop arranged or formed on an axle tube section of a vehicle axle. The at least one guide section can be designed and / or arranged to interact with an axle tube section of a vehicle axle.

[0023] The differential lock can have a spring. The spring can act on the second clutch part. The spring can act on the second clutch part toward the first shift position. The spring can be guided on the second clutch part. The spring can be guided radially on the inside of the second clutch part. The spring can be designed as a helical compression spring.

[0024] The differential gear is designed for installation 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 installation in a vehicle axle, in particular in a housing section of an axle body. The differential gear can be designed and / or arrangeable to compensate for rotational speeds between a first axle shaft and a second axle shaft. The differential gear has the differential lock according to the invention. In this respect, the differential gear can also be referred to as a limited-slip differential.

[0025] The differential gear can have a differential carrier, a drive gear, at least one axle gear, in particular a first axle gear and a second axle gear, and / or at least one differential gear, in particular two differential gears. The differential gear can have a drive axle and an output axle. The drive axle and the output axle can be arranged at least approximately at right angles to one another. The drive axle and the output axle can intersect or be skewed to one another. The drive gear can be arranged coaxially to the drive axle. The at least one axle gear, in particular the first axle gear and the second axle gear, can be arranged coaxially to the output axle.

[0026] The differential carrier can form a base of the differential gear. The differential carrier can be designed and / or arrangeable for rotatable mounting on a vehicle axle, in particular on a housing section of an axle body. The drive gear can be fixedly connected to the differential carrier, in particular in a rotationally fixed and axially fixed manner. The at least one axle gear can be rotatably mounted on the differential carrier. The at least one differential gear can be rotatably mounted on the differential carrier. The first axle gear and the second axle gear can be connected to one another to compensate for rotational speeds. The first axle gear and the second axle gear can be connected to one another by means of the at least one differential gear. The at least one differential gear can be toothed with both the first drive gear and the second drive gear.The drive gear, the at least one axle gear, and / or the at least one differential gear can be designed as a bevel gear. The differential carrier can have a connecting section for the first clutch part. The differential carrier can have an end stop. The end stop can be assigned to the second switching position of the differential lock. The end stop can limit the displaceability of the second clutch part in the second switching position. The end stop can be designed and / or arranged to define the second switching position.

[0027] The first clutch part of the differential lock can be fixedly connected to the differential carrier of the differential gear, in particular in a rotationally fixed and axially fixed manner. The first clutch part can be connected to the differential carrier in a form-fitting, non-positive and / or materially bonded manner. The first clutch part can be manufactured as a single piece with the differential carrier. The first clutch part and the differential carrier can initially be manufactured separately from one another and then connected to one another. The first clutch part can be connected to the differential carrier by welding or screwing and / or using a profile connection. The first clutch part can be arranged coaxially to the output axle. The clutch axle and the output axle can be coaxial to one another. The first clutch part can be arranged on a side of the differential carrier assigned to the first axle shaft.

[0028] The at least one axle gear can be designed and / or arranged for a fixed connection, in particular for a rotationally fixed and axially fixed connection, to an axle shaft of a vehicle axle. The first axle gear can be designed and / or arranged for a fixed connection, in particular for a rotationally fixed and axially fixed connection, to a first axle shaft. The second axle gear can be designed and / or arranged for a fixed connection, in particular for a rotationally fixed and axially fixed connection, to a second axle shaft.

[0029] The spring of the differential lock can be supported on the one hand on the second clutch part and on the other hand on the at least one axle gear of the differential gear. The spring can act axially between the second clutch part and the at least one axle gear of the differential gear.

[0030] The vehicle axle can be designed for arrangement and / or use in a motor vehicle, in particular in a passenger car, a bus, a truck, an agricultural or forestry tractor, a self-propelled work machine, such as a construction machine, or another motor vehicle, such as an industrial truck. The vehicle axle can be designed and / or arrangeable to connect a vehicle body and vehicle wheels to one another. The vehicle axle is driven. The vehicle axle can be designed and / or arrangeable to transmit drive power from a travel drive machine to vehicle drive wheels. The vehicle axle has the differential gear according to the invention.

[0031] The vehicle axle may have at least one axle shaft, in particular a first axle shaft and a second axle shaft. The at least one axle shaft may be designed and / or arranged to transmit drive power from the differential gear to at least one vehicle drive wheel. The differential lock of the differential gear may be effective on the at least one axle shaft, in particular on the first axle shaft. The differential lock of the differential gear may be effective between the at least one axle shaft, in particular the first axle shaft, and the differential gear, in particular the differential cage.

[0032] The at least one axle gear of the differential gear can be fixedly connected, in particular rotationally and axially fixedly, to the at least one axle shaft of the vehicle axle. The at least one axle gear and the at least one axle shaft can be connected to one another by means of a shaft-hub connection. The connection acting between the at least one axle gear and the at least one axle shaft can be designed and / or arranged to transmit torques and axial forces. The first axle gear can be connected to the first axle shaft. The second axle gear can be connected to the second axle shaft.

[0033] The second coupling part of the differential lock can be connected to the at least one axle shaft, in particular to the first axle shaft, in a rotationally fixed and axially displaceable manner. The second coupling part can be guided axially displaceably on the at least one axle shaft, in particular on the first axle shaft. The second coupling part and the at least one axle shaft, in particular the first axle shaft, can be connected to one another by means of a shaft-hub connection. The shaft-hub connection acting between the second coupling part and the at least one axle shaft, in particular the first axle shaft, can be designed and / or arranged to transmit torque and be axially displaceable.

[0034] The vehicle axle may have an axle body. The axle body may have a longitudinal axle body axis. The longitudinal axle body axis and the coupling axis of the coupling formed by means of the first coupling part and the second coupling part may be arranged coaxially with one another. The axle body may have a housing section. The differential gear may be received and / or arranged in the housing section. The axle body may have at least one axle tube section, in particular a first axle tube section and a second axle tube section. The at least one axle tube section may be arranged coaxially with the longitudinal axle body axis. The first axle tube section and the second axle tube section may be arranged on opposite sides of the housing section.

[0035] The transmission element of the differential lock can be axially displaceably connected to the at least one axle tube section, in particular to the first axle tube section. The transmission element can be guided axially displaceably on the at least one axle tube section. The at least one axle tube section, in particular the first axle tube section, can have an end stop for the transmission element. The end stop can be assigned to the first switching position of the differential lock. The end stop can limit the displaceability of the second coupling part in the first switching position. The end stop can be designed and / or arranged to define the first switching position. A sliding connection and / or a sealing arrangement can be effective between the transmission element and the at least one axle tube section, in particular the first axle tube section.

[0036] The at least one axle shaft can be arranged in the at least one axle tube section. The at least one axle shaft can be arranged coaxially to the at least one axle tube section and / or to the axle body longitudinal axis. The at least one axle shaft can be arranged radially within the at least one axle tube section. The at least one axle shaft can be rotatably mounted within the at least one axle tube section. The first axle shaft can be arranged and / or rotatably mounted in the first axle tube section. The second axle shaft can be arranged and / or rotatably mounted in the second axle tube section.

[0037] A receiving space can be formed between the at least one axle shaft and the at least one axle tube section, in particular between the first axle shaft and the first axle tube section. The receiving space can have an annular or cylindrical shape. The first coupling part, the second coupling part, the transmission element and / or the spring of the differential lock can be arranged in the receiving space. The transmission element can be arranged radially between the at least one axle shaft and the at least one axle tube section, in particular between the first axle shaft and the first axle tube section. The spring can be guided on the at least one axle shaft, in particular on the first axle shaft. The spring can be guided radially on the outside of the at least one axle shaft, in particular on the first axle shaft.

[0038] In summary and to put it another way, the invention thus results in, among other things, a differential lock with a positive-locking clutch similar to DIN 5480, designed in particular with two rows of teeth to reduce the shift travel. One of the two rows of teeth can be designed with rounded teeth on the front side to facilitate the engagement process. The positive-locking clutch can have a profile connection. The clutch with a profile connection and an annular piston shift can ensure a radially advantageous design. A compression spring can be arranged between an axle bevel gear and a sliding sleeve, partially within the differential, and thus also ensure an axially advantageous design. A spring preload acting on the axle bevel gear can improve the load-bearing behavior and acoustics of the differential.

[0039] The invention reduces complexity, in particular operating complexity, radial space requirements, axial space requirements, wear, maintenance requirements, and / or noise generation. Specific load capacity and / or comfort are increased.

[0040] An embodiment of the invention is described in more detail below with reference to figures, which show schematically and by way of example: Fig. 1 section of a driven vehicle axle with a lockable differential gear in unlocked position, Fig. 2 a section of a driven vehicle axle with a lockable differential gear in locked position, Fig. 3 a first coupling part of a differential lock of a differential gear and Fig. 4 a second coupling part of a differential lock of a differential gear.

[0041] Fig. 1 shows a section of a driven vehicle axle with a differential gear and a differential lock in the disengaged state. Fig. 2 shows the vehicle axle with the differential lock engaged.

[0042] The vehicle axle comprises an axle body with a housing section, a first axle tube section 1, a second axle tube section, and an axle body longitudinal axis 2, a first axle shaft 3, and a second axle shaft. The axle tube sections are arranged on opposite sides of the housing section. The first axle shaft 3 is rotatably mounted within the first axle tube section 1. The second axle shaft is rotatably mounted within the second axle tube section.

[0043] The differential gear has a differential carrier 4, a drive gear, a first axle gear 5, a second axle gear, and differential gears 6. The differential carrier 4 is rotatably mounted on the housing section of the axle body. The drive gear is fixedly connected to the differential carrier 4. The first axle gear 5 is rotatably mounted on the differential carrier 4 and is connected in a rotationally fixed and axially fixed manner to the first axle shaft 3. The second axle gear is rotatably mounted on the differential carrier 4 and is connected in a rotationally fixed and axially fixed manner to the second axle shaft. The differential gears 6 are rotatably mounted on the differential carrier 4.

[0044] The first axle gear 5 and the second axle gear are connected to each other by means of the compensating gears 6.

[0045] The differential lock has a first clutch part 7, a second clutch part 8, a bearing 9, an annular piston 10 and a spring 11. The first clutch part 7 is also in Fig. 3 in perspective view, the second coupling part 8 is also shown in Fig. 4 shown in perspective view.

[0046] The first clutch part 7 and the second clutch part 8 form a switchable, positive-locking clutch with a clutch axis coaxial with the axle body's longitudinal axis 2. The first clutch part 7 is connected to the differential carrier 4 in a rotationally fixed and axially fixed manner. For this purpose, the differential carrier 4 and the first clutch part 7 have corresponding connecting sections with axial and radial connecting surfaces. The second clutch part 8 is connected to the first axle shaft 3 in a rotationally fixed and axially displaceable manner. For this purpose, an axially displaceable shaft-hub connection is arranged or effective between the first axle shaft 3 and the second clutch part 8.

[0047] The first coupling part 7 has a first toothing 12, a tooth-free intermediate section 13, and a second toothing 14. The second coupling part 8 has a first toothing 15, a tooth-free intermediate section 16, and a second toothing 17. The first toothings 12, 15 are assigned to one another. The second toothings 14, 17 are assigned to one another. The intermediate section 13 of the first coupling part 7 is assigned to the first toothing 15 of the second coupling part 8. The intermediate section 16 of the second coupling part 8 is assigned to the second toothing 14 of the first coupling part 7. The toothings 12, 14 of the first coupling part 7 are designed as hub profiles. The toothings 15, 17 of the second coupling part 8 are designed as shaft profiles.

[0048] The second clutch part 8 is displaceable between a first switching position and a second switching position. In the first switching position, the teeth 12, 14 of the first clutch part 7 and the teeth 15, 17 of the second clutch part 8 are disengaged. In the first switching position, the clutch is open, the first axle shaft 3 is rotatable relative to the differential carrier 4, and the differential lock is disengaged. The first toothing 15 of the second clutch part 8 is exposed at the toothing-free intermediate section 13 of the first clutch part 7, and the second toothing 12 of the first clutch part 7 is exposed at the toothing-free intermediate section 16 of the second clutch part 8. In the second switching position, the toothings 12, 14 of the first clutch part 7 and the toothings 15, 17 of the second clutch part 8 are in engagement with one another.In the second switching position, the toothing 12 of the first clutch part 7 and the toothing 15 of the second clutch part 8 form a first shaft-hub connection, and the toothing 14 of the first clutch part 7 and the toothing 17 of the second clutch part 8 form a second shaft-hub connection. In the second switching position, the clutch is closed, the first axle shaft 3 is non-rotatably coupled to the differential carrier 4, and the differential lock is engaged.

[0049] The annular piston 10 serves as a transmission element for transmitting a pneumatic actuating force to the second clutch part 8 and is guided axially displaceably on the first axle tube section 1. The annular piston 10 and the second clutch part 8 each have a bearing section formed by an axial surface. The bearing 9 is designed as an axial bearing and is supported on the one hand on the bearing section of the second clutch part 8 and on the other hand on the bearing section of the annular piston 10.

[0050] The second clutch part 8 has an annular recess for the spring 11 on its radial inside, which is open radially inward and axially toward the differential gear. The recess forms a radial surface as a guide section and an axial surface as a support section for the spring 11. The spring 11 is designed as a helical compression spring, is radially guided on the guide section of the second clutch part 8 and on the first axle shaft 3, is axially supported on the support section of the second clutch part 8 and on the first axle gear 5 of the differential gear, and urges the second clutch part 8 toward the first shift position.

[0051] The second gears 14, 17 are designed and arranged as guide gears with a meshing profile. For this purpose, the second gears 14, 17 are spaced axially closer from each other in the first switching position than the first gears 12, 15, and have rounded teeth on their opposing axial end faces as meshing profiles.

[0052] The annular piston 10 is stepped radially on the outside with an axial surface as a stop section. The first axle tube section 1 has an end stop for the annular piston 10. The end stop of the first axle tube section 1 limits the displacement of the second clutch part 8 and defines the first switching position. The second clutch part 8 is axially flat on the front side with an axial surface as a stop section. The differential carrier 4 of the differential gear has an end stop for the second clutch part 8. The end stop of the differential carrier 4 limits the displacement of the second clutch part 8 and defines the second switching position.

[0053] To engage the differential lock, the annular piston 10 is subjected to a pneumatic actuating force, so that the second clutch part 8 is displaced via the bearing 9 against the spring force of the spring 11 in the direction of the second switching position. The second gear teeth 14, 17 engage first, with the meshing profiles assisting the meshing. As soon as the second gear teeth 14, 17 have engaged with each other, the first gear teeth 12, 15 follow smoothly until the stop section of the second clutch part 8 strikes the end stop of the differential carrier 4. The engaged state of the differential lock is Fig.2. To disengage the differential lock, the annular piston is relieved of an actuating force and / or a holding force, so that the second clutch part 8 is displaced back in the direction of the first switching position under the action of the spring force of the spring 11 until the stop section of the annular piston 10 strikes the end stop of the first axle tube section 1 and the toothings 12, 14, 15, 17 are disengaged. Reference symbol 1 first axle tube section 2 Axle body longitudinal axis 3 first axle shaft 4 Differential cage 5 first axle gear 6 Compensating gear 7 first coupling part 8 second coupling part 9 camps 10 ring pistons 11 spring 12 first toothing (of the first coupling part) 13 tooth-free intermediate section (of the first coupling part) 14 second toothing (of the first coupling part) 15 first toothing (of the second coupling part) 16 tooth-free intermediate section (of the second coupling part) 17 second toothing (of the second coupling part) QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 113883252 A

[0002]

Claims

[1] Differential lock for a differential gear, the differential lock comprising an axially fixed first clutch part (7) and a second clutch part (8) axially displaceable between a first switching position and a second switching position, characterized by that the coupling parts (7, 8) each have a first toothing (12, 15) and at least one further toothing (14, 17) for transmitting a torque, wherein the toothings (12, 14, 15, 17) are disengaged in the first switching position and engaged with one another in the second switching position. [2] Differential lock according to claim 1, characterized by that the coupling parts (7, 8) each have a tooth-free intermediate section (13, 16) between the first toothing (12, 15) and the at least one further toothing (14, 17). [3] Differential lock according to at least one of the preceding claims, characterized bythat one of the toothings (12, 14, 15, 17) is designed and / or arranged as a guide toothing for an earlier engagement when the second clutch part (8) is displaced in the direction of the second switching position. [4] Differential lock according to at least one of the preceding claims, characterized by that at least one of the toothings (12, 14, 15, 17) has a single-track profile. [5] Differential lock according to at least one of the preceding claims, characterized by that the toothings (12, 14) of the first coupling part (7) are designed as hub profiles and the toothings (15, 17) of the second coupling part (8) are designed as shaft profiles. [6] Differential lock according to at least one of the preceding claims, characterized by that the first coupling part (7) is assigned to a differential carrier (4) of a differential gear and the second coupling part (8) is assigned to an axle shaft (3) of a driven vehicle axle. [7] Differential lock according to at least one of the preceding claims, characterized by that the differential lock has an annular piston (10) arranged coaxially to the second clutch part (8) for transmitting an actuating force to the second clutch part (8). [8] Differential lock according to at least one of the preceding claims, characterized by that the differential lock has a spring (11) acting on the second coupling part (8) and the spring (11) is guided radially on the second coupling part (8). [9] Differential gear for a driven vehicle axle, characterized by that the differential gear has a differential lock according to at least one of claims 1 to 8. [10] Differential gear according to claim 9, characterized bythat the differential gear has at least one axle gear (5) and the spring (11) of the differential lock is supported on the one hand on the second coupling part (8) and on the other hand on the at least one axle gear (5). [11] Driven vehicle axle, characterized by that the vehicle axle has a differential gear according to at least one of claims 9 to 10. [12] Vehicle axle according to claim 11, characterized by that the vehicle axle has at least one axle shaft (3) and an axle body with at least one axle tube section (1) and the annular piston (10) of the differential lock is arranged radially between the at least one axle shaft (3) and the at least one axle tube section (1).

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