Differential lock, differential gear and vehicle axle

Abstract

Differential lock for a differential gear, the differential lock comprising a clutch part (7) which is displaceable under the action of an actuating force, a transmission element for transmitting an actuating force to the clutch part (7), and an actuating bearing (8) arranged between the clutch part (7) and the transmission element, characterized in that the differential lock has a lubricating arrangement which has a lubricating oil collector (16) which is designed and / or arranged to collect lubricating oil and supply it to the actuating bearing (8), and a lubricating oil channel (15) which is designed and / or arranged to supply lubricating oil to the lubricating oil collector (16).

Description

[0001] The invention relates to a differential lock for a differential gear, the differential lock comprising a clutch part displaceable under the action of an actuating force, a transmission element for transmitting an actuating force to the clutch part, and an actuating bearing arranged between the clutch part and the transmission element. Furthermore, the invention relates to a differential gear for a driven vehicle axle. Furthermore, the invention relates to a driven vehicle axle with an axle body.

[0002] From the document DE 10 2017 211 379 A1 an arrangement is known with an axle distribution housing of a vehicle axle which is at least partially integrated into an axle drive housing and has an oil supply circuit, in which at least one oil collecting element is provided in the axle drive housing space at a connecting section between an axle drive housing space and an axle distribution housing space, wherein the oil collecting element is assigned at least one inlet region for the predetermined oil flow into the axle distribution housing space.

[0003] From the document DE 197 11 743 A1, a transmission arrangement is known, in particular a spur gear transmission with a transmission housing closed by a cover, in which a differential gear containing two axle shaft gears and at least two differential gears is arranged, the differential gear housing of which is drivable about two mutually aligned drive shafts, wherein for the lubrication of the gears arranged within the transmission housing and the differential gear, the transmission housing is provided with a defined oil level, wherein for the lubrication of the differential gear, an annular groove concentric to the axis of rotation of the differential gear housing is provided in an end wall of the otherwise closed differential gear housing, in the area of ​​which an annular groove is provided, and in which an oil collecting tray delimiting an annular gap is arranged outside next to the end wall of the differential gear housing,which has a collar engaging in the annular groove.,

[0004] Furthermore, DE 10 2005 037 559 A1 discloses a differential lock for a differential gear. The differential lock has a transmission element designed as a piston, via which an actuating force can be transmitted to a clutch part. The clutch part is designed as a sliding sleeve, with an actuating bearing arranged between the clutch part and the transmission element. Furthermore, such differential locks are also disclosed in DE 10 2006 012 065 A1 and CN 204 533 430 U.

[0005] 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.

[0006] The problem is solved with a differential lock having the features of claim 1. Furthermore, the problem is solved with a differential gear having the features of claim 15. Furthermore, the problem is solved with a vehicle axle having the features of claim 16. Advantageous embodiments and / or further developments are the subject of the subclaims.

[0007] The differential lock is designed and / or can be arranged to lock a differential gear. The differential lock has a clutch part that is displaceable under the action of an actuating force, a transmission element for transmitting an actuating force to the clutch part, an actuating bearing arranged between the clutch part and the transmission element, and a lubrication arrangement. The clutch part can be axially displaceable. "Axial" in this context refers in particular to a direction of extension of the clutch axis. The differential lock can have an axially fixed clutch part. The axially fixed clutch part and the displaceable clutch part can form a switchable and / or positive-locking clutch. The clutch can have a clutch axis.

[0008] The lubrication arrangement is designed and / or arranged to lubricate the actuating bearing of the differential lock. The lubrication arrangement has a lubricating oil collector and a lubricating oil channel. The lubricating oil collector is designed and / or arranged to collect lubricating oil and supply it to the actuating bearing. The lubricating oil channel is designed and / or arranged to supply lubricating oil to the lubricating oil collector. The lubricating oil can also serve for cooling and is therefore also referred to as cooling oil. A transmission oil, in particular, can be used as the lubricating oil. The lubrication arrangement can also have or contain components of the differential lock, a differential gear, and / or a vehicle axle.

[0009] The axially fixed clutch part is also referred to herein as the first clutch part. 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 arranged 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.

[0010] The axially displaceable coupling part is also referred to herein as the second coupling part. 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 arranged 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. The second coupling part can be part of the lubrication arrangement.

[0011] The coupling parts can be arranged coaxially to one another and / or to the coupling axis. The coupling parts can each have corresponding gearings assigned to one another. The gearings can be designed and / or arranged to transmit torque. The gearing of the first coupling part can be designed as a hub profile, and the gearing of the second coupling part can be designed as a shaft profile. The gearing of the first coupling part can be designed as a shaft profile, and the gearing 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.

[0012] The second clutch part can be displaceable between a first switching position and a second switching position. The clutch can thus be switchable 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. 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 and torque transmission between the first clutch part and the second clutch part can be enabled.The gears can be designed and / or arranged to switch the clutch between the first switching position and the second switching position.

[0013] 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 the transmission element. 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 the actuating bearing.

[0014] The transmission element is designed and / or arranged to transmit 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 arranged coaxially with the second clutch part and / or with the clutch axis. The annular piston can be stepped radially on the inside. The transmission element can be part of the lubrication arrangement.

[0015] The transmission element can have a bearing section. The bearing section can be formed by means of an axial surface of the transmission element and / or arranged radially inward on the annular piston. The bearing section can be designed and / or arranged to axially support the actuating bearing.

[0016] The actuating bearing can be supported on the one hand on the bearing section of the second clutch part and on the other hand on the bearing section of the transmission element. The actuating bearing can be designed as a rolling bearing, in particular as an axial bearing and / or as a needle bearing. The actuating bearing can have a cage, rolling elements, a first bearing disc, and / or a second bearing disc. The rolling elements can be needle-shaped, rotatably mounted on the cage, and arranged with their axes of rotation radial to the axle body longitudinal axis and / or the clutch axis and / or radially extending from the axle body longitudinal axis and / or the clutch axis. The first bearing disc can be arranged between the rolling elements and the bearing section of the second clutch part. The second bearing disc can be arranged between the rolling elements and the bearing section of the transmission element.The rolling elements can be designed and / or arranged to roll on the one hand on the first bearing disc or on the bearing section of the second coupling part and on the other hand on the second bearing disc or on the bearing section of the transmission element.

[0017] 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.

[0018] The lubricating oil channel may have a lubricating oil channel inlet. The lubricating oil channel may have a lubricating oil channel outlet. The lubricating oil channel outlet may be designed and / or arranged to supply lubricating oil to the lubricating oil collector. The lubricating oil channel outlet may be associated with the lubricating oil collector. The lubricating oil channel outlet may be arranged vertically above the lubricating oil collector. The term "vertical" in this context refers in particular to a geodetic arrangement.

[0019] The lubricating oil channel can have an axial section. The term "axial" in this context refers in particular to a direction of extension of a longitudinal axle body axis and / or clutch axis. The axial section can therefore run essentially along the longitudinal axle body axis and / or clutch axis. A course of the axial section essentially along the longitudinal axle body axis and / or clutch axis does not preclude the axial section from also running obliquely to the longitudinal axle body axis and / or clutch axis. The axial section can run obliquely to the longitudinal axle body axis and / or clutch axis up to an angle of a maximum of approximately 30°, in particular up to an angle of a maximum of approximately 20°, in particular up to an angle of a maximum of approximately 10°. The axial section can run obliquely from the lubricating oil channel inlet towards the longitudinal axle body axis and / or clutch axis. The lubricating oil channel can have a radial section.In this context, the term "radial" refers in particular to the direction of extension of an axle body longitudinal axis and / or coupling axis. The radial section can thus run essentially perpendicular to the axle body longitudinal axis and / or coupling axis. The axial section and the radial section can run at least approximately at right angles to each other.

[0020] The axial section may be designed and / or arranged to conduct lubricating oil to the radial section. The axial section may have the lubricating oil channel inlet. The radial section may be designed and / or arranged to conduct lubricating oil from the axial section to the lubricating oil collector. The radial section may have the lubricating oil channel outlet.

[0021] The lubricating oil channel may be designed and / or arranged to receive lubricating oil at a differential bearing of a vehicle axle. The lubricating oil channel inlet may be associated with a differential bearing of a vehicle axle. The lubricating oil channel may be designed and / or arranged to conduct lubricating oil from a differential bearing of a vehicle axle to the lubricating oil collector. The lubrication arrangement may include the differential bearing.

[0022] The lubricating oil channel can be arranged in an axle body of a vehicle axle. The lubricating oil channel can be arranged in a housing wall formed by the axle body. The axle body, in particular a first axle tube section of the axle body, can be part of the lubrication arrangement. The lubricating oil channel can be cast or designed as a bore. The axial section can be cast or designed as a bore. The radial section can be cast or designed as a bore.

[0023] The lubricating oil collector may have a collecting section. The collecting section may be designed and / or arranged to collect lubricating oil from the lubricating oil channel, in particular from the lubricating oil channel outlet. The lubricating oil collector, in particular the output section, may be arranged vertically below the lubricating oil channel outlet. The term "vertical" in this context refers in particular to a geodetic arrangement. The lubricating oil collector may have an output section. The output section may be designed and / or arranged to supply lubricating oil to the actuating bearing. The output section may be assigned to the actuating bearing. The output section may be directed toward the actuating bearing.

[0024] The lubricating oil collector can be designed and / or arranged to form a lubricating oil reservoir. The lubricating oil collector can have a base section and an edge section. The base section can extend axially. The edge section can be angled towards the longitudinal axis of the axle body. The lubricating oil collector can have a collecting section. The collecting section can be designed and / or arranged to collect lubricating oil collected by the collecting section and to discharge it via the output section once a predetermined fill volume has been reached. The collecting section, the collecting section and / or the output section can be structurally and / or functionally combined or designed separately from one another. The collecting section and / or the collecting section can be designed in a bead-like or groove-like manner.

[0025] The lubricating oil collector can have a half-shell and / or arcuate shape. The lubricating oil collector can extend over a range of approximately 180° in the circumferential direction. "Circumferential direction" in this context refers in particular to a circular arc direction relative to a longitudinal axis of the axle body and / or the clutch axis. The lubricating oil collector can be made of sheet metal.

[0026] The differential lock actuating bearing can be arranged between a clutch part of the differential lock that can be displaced under the action of an actuating force and a transmission element of the differential lock for transmitting an actuating force to the clutch part. The lubricating oil collector can be arranged in the area of ​​the actuating bearing.

[0027] The lubricating oil collector can be arranged on a side of the actuating bearing facing the clutch part. The lubricating oil collector can be arranged on the clutch part side of the actuating bearing. The lubricating oil collector can be designed and / or arranged to supply the actuating bearing with lubricating oil in the axial direction and / or from the radial outside. The terms "axial" and "radial" in this context refer in particular to an extension direction of an axle body longitudinal axis and / or clutch axis. The lubrication arrangement can comprise the clutch part. The clutch part can have a surface section that can be suitable for conducting lubricating oil from the lubricating oil channel, in particular from the lubricating oil channel outlet, to the lubricating oil collector, in particular to the collecting section.The coupling part can be arranged with its surface section suitable for guiding lubricating oil between the lubricating oil channel, in particular the lubricating oil channel outlet, and the lubricating oil collector, in particular the collecting section.

[0028] The lubricating oil collector can be arranged on a side of the actuating bearing facing the transmission element. The lubricating oil collector can be arranged on the transmission element side of the actuating bearing. The lubricating oil collector can be designed and / or arranged to supply the actuating bearing with lubricating oil in the axial direction and / or from the radial inside. The terms "axial" and "radial" in this context refer in particular to an extension direction of an axle body longitudinal axis and / or clutch axis. The lubricating arrangement can comprise the transmission element. The transmission element can be designed as an annular piston. The annular piston can have an inner surface. The inner surface can have a first inner surface section and a second inner surface section. The first inner surface section can have a larger diameter than the second inner surface section.The inner surface, in particular the second inner surface section, can be conical. The inner surface, in particular the second inner surface section, can be conically widened toward the actuating bearing. The annular piston, in particular the inner surface, can be suitable for conducting lubricating oil from the lubricating oil collector, in particular from the discharge section, to the actuating bearing. The discharge section of the lubricating oil collector can be arranged radially inside the annular piston. The discharge section of the lubricating oil collector can be arranged on the inner surface.

[0029] 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 arranged for installation in a vehicle axle, in particular in a housing section of an axle body. The differential gear can be designed and / or arranged 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.

[0030] 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.

[0031] The differential carrier can form a base of the differential gear. 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 portion 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 displacement 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.

[0032] 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 traction drive machine to vehicle drive wheels. The vehicle axle has an axle body, the differential gear according to the invention, and at least one differential bearing.

[0033] The vehicle axle can have a first differential bearing and a second differential bearing. The at least one differential bearing can be designed and / or arranged to rotatably support the differential carrier on the axle beam. The at least one differential bearing can be supported on the one hand on the differential carrier and on the other hand on the axle beam. The differential bearing can be designed as a rolling bearing, in particular as a radial bearing and / or as a deep groove ball bearing. The differential bearing can have an inner ring, a cage, rolling elements, and / or an outer ring. The inner ring can be assigned to the differential carrier. The outer ring can be assigned to the axle beam. The rolling elements can be balls. The at least one differential bearing, in particular the first differential bearing, can be part of the lubrication arrangement.

[0034] The differential gear can have a pressure lubrication system. The pressure lubrication system can be designed and / or arranged for lubrication with lubricating oil. The pressure lubrication system can have a lubricant pump. The pressure lubrication system can be designed and / or arranged to lubricate the at least one differential bearing. The pressure lubrication system can be part of the lubrication arrangement. The at least one differential bearing can be pressure-lubricated. The at least one differential bearing can be pressurized with lubricating oil. The at least one differential bearing can be a bearing with a conveying effect. The at least one differential bearing can be a bearing without a conveying effect. The at least one differential bearing can be a bearing that offers low and / or reduced flow resistance to a lubricating oil flow.

[0035] The vehicle axle can have at least one axle shaft, in particular a first axle shaft and a second axle shaft. The at least one axle shaft can 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 can be effective on the at least one axle shaft, in particular on the first axle shaft. The differential lock of the differential gear can be effective between the at least one axle shaft, in particular the first axle shaft, and the differential gear, in particular the differential cage.

[0036] 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.

[0037] The second clutch 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 clutch part can be guided axially displaceably on the at least one axle shaft, in particular on the first axle shaft. The second clutch 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 clutch 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.

[0038] The axle body can have a longitudinal axis of the axle body. The longitudinal axis of the axle body and the coupling axis of the coupling formed by means of the first coupling part and the second coupling part can be arranged coaxially with one another. The axle body can have a housing section. The differential gear can be received and / or arranged in the housing section. The axle body can 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 can be arranged coaxially with the longitudinal axis of the axle body. The first axle tube section and the second axle tube section can be arranged on opposite sides of the housing section. The axle body, in particular the first axle tube section, can form a housing wall. The axle body, in particular the first axle tube section, can be part of the lubrication arrangement.

[0039] 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 clutch 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.

[0040] 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.

[0041] 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 be part of the lubrication arrangement. The receiving space can be delimited by means of the at least one axle tube section as a housing wall, in particular by means of the first axle tube section as a housing wall. The receiving space can have an annular or cylindrical shape. The first clutch part, the second clutch part, the actuating bearing, 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.

[0042] In summary and to put it another way, the invention thus results in, among other things, bearing lubrication of a differential lock circuit. The circuit of this differential lock can be designed as an annular piston circuit. This means that an annular piston can be located in the housing as a transmission element, which can be moved axially. The annular piston can be connected to a sliding sleeve via an actuating bearing, in particular via a rolling bearing such as an axial needle bearing. The sliding sleeve can form a coupling part of a clutch of a differential lock. The sliding sleeve can have locking teeth via which the differential can be locked. The starting point for bearing lubrication can be the differential bearing, for which it can be ensured that it is supplied with sufficient lubricating oil (forced lubrication).The rolling elements of the differential bearing can pump oil through the bearing, causing some of the oil to be sprayed onto the housing wall. From the housing wall, the oil can flow into a bore in the housing, which can extend axially into the area behind the piston. The bore in the housing is also referred to as the axial section of a lubricating oil channel. There, the bore opens into a cast channel in the housing. The cast channel in the housing is also referred to as the radial section of a lubricating oil channel. The oil can reach the interior of the housing via the bore and the cast channel, run down the inner wall of the housing, and be collected by a baffle plate. The baffle plate is also referred to as a lubricating oil collector. The baffle plate can be installed only in the lower 180° of the housing. The contour of the baffle plate can be designed so that an oil reservoir can form there, in which the oil can accumulate.Once a certain accumulation height is reached, the oil can flow into the annular piston. The piston can be slightly conical in this area, allowing the oil to flow toward the bearing.

[0043] Alternatively, the bore in the housing, also referred to as the axial section of a lubricating oil channel, can extend axially into the area in front of the piston and there open into a second bore in the housing. The second bore in the housing is also referred to here as the radial section of a lubricating oil channel. The oil can reach the interior of the housing through these two bores and from there drip onto the sliding sleeve. Due to gravity, the oil can run down the sliding sleeve and from there drip into a baffle plate.

[0044] The invention ensures that an actuating bearing of a differential lock is always supplied with sufficient oil for lubrication and cooling, even in a nested design.

[0045] In the following, embodiments of the invention are described in more detail with reference to the figures, which show schematically and by way of example: Fig. 1 a section of a driven vehicle axle with a lockable differential gear and a lubrication arrangement with a lubricating oil collector for a differential lock arranged on the clutch part side of an actuating bearing, in a sectional view, Fig. 2 a partial detailed view of Fig. 1, Fig. 3 a lubricating oil collector of a lubrication arrangement for a differential lock, designed for arrangement on a side of an actuating bearing facing a transmission element, in a detailed view, Fig. 4 shows a section of a driven vehicle axle with a lockable differential gear and a lubrication arrangement with a lubricating oil collector for a differential lock arranged on the transmission element side of an actuating bearing, in a sectional view, Fig. 5 a partial detailed view of Fig. 4 and Fig. 6 a lubricating oil collector of a lubrication arrangement for a differential lock, designed for arrangement on a side of an actuating bearing facing a transmission element, in a detailed view.

[0046] Fig. 1 shows a section of a driven vehicle axle with a lockable differential gear and a lubrication arrangement with a lubricating oil collector 16 for a differential lock arranged on the clutch part side of an actuating bearing in a sectional view. Fig. 2 shows a partial detailed view of Fig. 1. Fig. 3 shows the lubricating oil collector 16 in detailed view.

[0047] The vehicle axle has 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 and a second axle shaft. The axle shafts are not shown here. The axle tube sections are arranged on opposite sides of the housing section. The first axle shaft is rotatably mounted within the first axle tube section 1. The second axle shaft is rotatably mounted within the second axle tube section. The housing section of the axle body forms a housing or a housing wall for the differential gear. The axle tube sections 1 form housings or housing walls for the axle shafts. The first axle tube section 1 of the axle body forms a housing or a housing wall for the differential lock.

[0048] The differential gear has a differential carrier 3, a drive gear, a first axle gear 4, a second axle gear, and differential gears. The differential carrier 3 is rotatably mounted on the housing section of the axle body by means of a first differential bearing 5 and a second differential bearing. The differential bearings 5 ​​are pressure-lubricated using a pressure-circulating lubrication system. The drive gear is fixedly connected to the differential carrier 3. The first axle gear 4 is rotatably mounted on the differential carrier 3 and is connected in a rotationally fixed and axially fixed manner to the first axle shaft. The second axle gear is rotatably mounted on the differential carrier 3 and is connected in a rotationally fixed and axially fixed manner to the second axle shaft. The differential gears are rotatably mounted on the differential carrier 3. The first axle gear 4 and the second axle gear are connected to one another by means of the differential gears.

[0049] The differential lock comprises a first clutch part 6, a second clutch part 7, an actuating bearing 8, an annular piston 9, and a spring 10. The first clutch part 6 and the second clutch part 7 form a switchable, positive-locking clutch with a clutch axis coaxial with the axle body's longitudinal axis 2. The first clutch part 6 is connected to the differential carrier 3 in a rotationally fixed and axially fixed manner. The second clutch part 7 is connected to the first axle shaft in a rotationally fixed and axially displaceable manner.

[0050] The first coupling part 6 and the second coupling part 7 have toothings 11, 12 assigned to one another, wherein the toothing 11 of the first coupling part 6 is designed as hub profiles and the toothing 12 of the second coupling part 7 is designed as shaft profiles.

[0051] The second clutch part 7 is displaceable between a first switching position and a second switching position. In the first switching position, the toothing 11 of the first clutch part 6 and the toothing 12 of the second clutch part 7 are disengaged. In the first switching position, the clutch is disengaged, the first axle shaft is rotatable relative to the differential carrier 3, and the differential lock is disengaged. In the second switching position, the toothing 11 of the first clutch part 6 and the toothing 12 of the second clutch part 7 are in engagement with one another. In the second switching position, the toothing 11 of the first clutch part 6 and the toothing 12 of the second clutch part 7 form a shaft-hub connection. In the second switching position, the clutch is closed, the first axle shaft is non-rotatably coupled to the differential carrier 3, and the differential lock is engaged.

[0052] The annular piston 9 serves as a transmission element for transmitting a pneumatic actuating force to the second clutch part 7 and is guided axially displaceably on the first axle tube section 1. The annular piston 9 is stepped radially on the inside and has an inner surface with a first inner surface section 13 with a larger diameter and a second inner surface section 14 with a smaller diameter. The annular piston 9 and the second clutch part 7 each have a bearing section formed by an axial surface. The actuating bearing 8 is designed as an axial bearing and is supported on the one hand on the bearing section of the second clutch part 7 and on the other hand on the bearing section of the annular piston 9.

[0053] The second clutch part 7 has an annular recess for the spring 10 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 10. The spring 10 is designed as a helical compression spring, is radially guided on the guide section of the second clutch part 7 and on the first axle shaft, is axially supported on the support section of the second clutch part 7 and on the first axle gear 4 of the differential gear, and urges the second clutch part 7 toward the first shift position.

[0054] The annular piston 9 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 9. The end stop of the first axle tube section 1 limits the displacement of the second clutch part 7 and defines the first switching position. The second clutch part 7 is axially flat on its end face with an axial surface as a stop section. The differential carrier 3 of the differential gear has an end stop for the second clutch part 7. The end stop of the differential carrier 3 limits the displacement of the second clutch part 7 and defines the second switching position.

[0055] To engage the differential lock, the annular piston 9 is subjected to a pneumatic actuating force, so that the second clutch part 7 is displaced via the actuating bearing 8 against a spring force of the spring 10 in the direction of the second switching position until the stop section of the second clutch part 7 strikes the end stop of the differential carrier 3. To disengage the differential lock, the annular piston 9 is relieved of an actuating force and / or a holding force, so that the second clutch part 7 is displaced back in the direction of the first switching position under the action of the spring force of the spring 10 until the stop section of the annular piston 9 strikes the end stop of the first axle tube section 1 and the gears 11, 12 disengage.

[0056] The lubrication arrangement serves to lubricate the actuating bearing 8 and has a lubricating oil channel 15 and a lubricating oil collector 16. The lubricating oil channel 15 has a lubricating oil channel inlet 17, an axial section 18 extending obliquely from the lubricating oil channel inlet 17 toward the axle body longitudinal axis 2, a radial section 19, and a lubricating oil channel outlet 20. The lubricating oil channel serves to receive lubricating oil at the first differential bearing 5 and to supply it to the lubricating oil collector 16. The radial section 19 and the lubricating oil channel outlet 20 are arranged in the axial direction on the clutch part side of the actuating bearing 8. The axial section 18 and the radial section 19 of the lubricating oil channel 15 are each designed as a bore in a housing wall 21 formed by the first axle tube section 1. The lubricating oil collector 16 serves to collect lubricating oil from the lubricating oil channel outlet 20, to form a lubricating oil reservoir and to supply lubricating oil to the actuating bearing 8.For this purpose, the lubricating oil channel outlet 20 of the lubricating oil channel 15 and the lubricating oil collector 16 are arranged one above the other or one below the other. The lubricating oil collector 16 is bead-shaped and extends in an arc shape in the circumferential direction over a range of approximately 180°, with an axially extending base section 22 and an edge section 23 angled obliquely toward the longitudinal axis of the axle body, and is made of sheet metal. The lubricating oil collector 16 is arranged in the area of ​​the actuating bearing 8 below the second clutch part 7 on the first inner surface section 13.

[0057] During operation of the vehicle axle, lubricating oil is collected at the first differential bearing 5 and initially guided through the lubricating oil channel 15 to the lubricating oil channel outlet 20. From there, the lubricating oil drips onto a surface section 24 of the second clutch part 7, runs downwards along it, and continues to drip off. The dripping lubricating oil is then collected by the lubricating oil collector 16 and fed to the actuating bearing 8. The edge section 23 enables the formation of a lubricating oil reservoir with a predetermined filling volume at the actuating bearing 8, so that the actuating bearing 8 is supplied with lubricating oil from there in the axial direction or from the radial outside. The lubricating oil channel 25 is in Fig. 1 shown with arrows.

[0058] Fig. 4 shows a section of a driven vehicle axle with a lockable differential gear and a lubrication arrangement with a lubricating oil collector 16 for a differential lock arranged on the transmission element side of an actuating bearing in a sectional view. Fig. 5 shows a partial detailed view of Fig. 4. Fig. 6 shows the lubricating oil collector 16 in detailed view.

[0059] The radial section 19 and the lubricating oil channel outlet 20 are arranged in the axial direction at an end of the annular piston 9 facing away from the second clutch part 7, so that the lubricating oil channel outlet 20 remains open even in the first switching position. The axial section 18 and the radial section 19 of the lubricating oil channel 15 are arranged in a housing wall 21 formed with the aid of the first axle tube section 1, wherein the axial section 18 is designed as a bore and the radial section 19 is cast. The lubricating oil channel outlet 20 of the lubricating oil channel 15 and the lubricating oil collector 16 are arranged one above the other and one below the other. The lubricating oil collector 16 is designed in an arc shape in the circumferential direction over a range of approximately 180°, with a bowl-shaped collecting and collecting section 26 and an axially extending groove-shaped discharge section 27, and is made of sheet metal.The lubricating oil collector 16 is arranged at the end of the annular piston 9 facing away from the second clutch part 7, with the collecting and catching section 26 forming a lubricant reservoir with a predetermined filling volume, and the discharge section 27 extending into the annular piston at the second inner surface section 14. The second inner surface section 14 is designed to widen conically toward the actuating bearing 8.

[0060] During operation of the vehicle axle, lubricating oil is absorbed at the first differential bearing 5 and initially guided through the lubricating oil channel 15 to the lubricating oil channel outlet 20. From there, the lubricating oil flows downwards along the inside of the housing wall 21 and is captured and collected by the collecting and collecting section 26 of the lubricating oil collector 16. Starting from the collecting and collecting section 26, the lubricating oil is then discharged via the discharge section 27 and fed to the actuating bearing 8 via the conical second inner surface section 14, so that the actuating bearing 8 is supplied with lubricating oil in the axial direction or from the radial inside. The lubricating oil channel 25 is in Fig. 4 shown with arrows.

[0061] For further description of the execution according to Fig. 4 to Fig. 6 refers to the description of the execution according to Fig. 1 to 3. Reference symbol 1 first axle tube section 2 Axle body longitudinal axis 3 Differential cage 4 first axle gear 5 first differential bearing 6 first coupling part 7 second coupling part 8 actuating bearings 9 ring pistons 10 springs 11 Toothing of the first coupling part 12 Toothing of the second coupling part 13 first inner surface section 14 second inner surface section 15 Lubricating oil channel 16 lubricating oil collectors 17 Lubricating oil channel inlet 18 Axial section 19 Radial section 20 Lubricating oil channel outlet 21 Housing wall 22 floor section 23 Edge section 24 Surface section 25 Lubricating oil run 26 Reception and collection section 27 Output section

Claims

[1] Differential lock for a differential gear, the differential lock comprising a coupling part (7) which is displaceable under the action of an actuating force, a transmission element for transmitting an actuating force to the coupling part (7) and an actuating bearing (8) arranged between the coupling part (7) and the transmission element, characterized by in that the differential lock has a lubrication arrangement which has a lubricating oil collector (16) which is designed and / or arranged to collect lubricating oil and to supply it to the actuating bearing (8), and a lubricating oil channel (15) which is designed and / or arranged to supply lubricating oil to the lubricating oil collector (16). [2] Differential lock according to claim 1, characterized by that the lubricating oil channel (15) has an axial section (18) and a radial section (19). [3] Differential lock according to claim 2, characterized bythat the axial section (18) is designed and / or arranged to guide lubricating oil to the radial section (19), and the radial section (19) is designed and / or arranged to guide lubricating oil from the axial section (18) to the lubricating oil collector (16). [4] Differential lock according to at least one of the preceding claims, characterized by that the lubricating oil channel (15) is designed and / or arranged to receive lubricating oil at a differential bearing (5) of a vehicle axle, and / or that it has a lubricating oil channel inlet (17) assigned to a differential bearing (5) of a vehicle axle. [5] Differential lock according to at least one of the preceding claims, characterized by that the lubricating oil channel (15) is arranged in a housing wall (21) formed by means of an axle body. [6] Differential lock according to at least one of the preceding claims, characterized bythat the lubricating oil channel (15) has a lubricating oil channel outlet (20) associated with the lubricating oil collector (16). [7] Differential lock according to at least one of the preceding claims, characterized by that the lubricating oil collector (16) is designed and / or arranged to form a lubricating oil reservoir. [8] Differential lock according to at least one of the preceding claims, characterized by that the lubricating oil collector (16) is designed like a half-shell and / or is made of sheet metal. [9] Differential lock according to at least one of claims 1 to 8, characterized by that the actuating bearing (8) is arranged between a coupling part (7) of the differential lock which is displaceable under the action of an actuating force and a transmission element of the differential lock for transmitting an actuating force to the coupling part (7), and the lubricating oil collector (16) is arranged on the coupling part side of the actuating bearing (8). [10] Differential lock according to claim 9, characterized by that the lubricating arrangement comprises the coupling part (7) and the coupling part (7) has a surface portion (24) which is suitable for guiding lubricating oil from the lubricating oil channel (15) to the lubricating oil collector (16). [11] Differential lock according to at least one of claims 9 to 10, characterized by that the lubricating oil collector (16) has a bottom section (22) and an edge section (23). [12] Differential lock according to at least one of claims 1 to 8, characterized by that the actuating bearing (8) is arranged between a coupling part (7) of the differential lock which is displaceable under the action of an actuating force and a transmission element of the differential lock for transmitting an actuating force to the coupling part (7), and the lubricating oil collector (16) is arranged on the transmission element side of the actuating bearing (8). [13] Differential lock according to claim 12, characterized by that the lubricating arrangement comprises the transmission element and the transmission element is designed as an annular piston (9) with a conical inner surface section (14) and is suitable for guiding lubricating oil from the lubricating oil channel (15) to the actuating bearing (8). [14] Differential lock according to at least one of claims 12 to 13, characterized by that the lubricating oil collector (16) has a collecting and collecting section (26) and an output section (27) associated with the actuating bearing (8). [15] Differential gear for a driven vehicle axle, characterized by that the differential gear has a differential lock according to at least one of the preceding claims. [16] Driven vehicle axle with an axle body, characterized by that the vehicle axle has a differential gear according to claim 15 and at least one differential bearing (5) acting between the axle body and the differential gear.

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