Differential lock device for differential transmission

Abstract

The invention relates to a differential lock apparatus for a differential transmission. The switching device comprises a switching element (20, 30) which is provided with a driving part (20) and a sliding sleeve (30). The driver (20) has two driver engagement sections (21, 22) which are spaced apart from each other in the axial direction. The sliding sleeve (30) has two sliding sleeve engagement sections (31, 32) which are spaced apart from each other in the axial direction. In the locked switching state, the driver engagement section (21, 22) and the sliding sleeve engagement section (31, 32) engage with each other. In the unlocked switching state, one of the driver engagement sections (21, 22) is arranged in the axial direction between the sliding sleeve engagement sections (31, 32), and one of the sliding sleeve engagement sections (31, 32) is arranged in the axial direction between the driver engagement sections (21, 22).

Description

Technical Field

[0001] This invention relates to a differential lock device for a differential transmission, a differential transmission device having a differential lock device, and a vehicle having a differential transmission. Background Technology

[0002] Differential lock devices for differential transmissions in vehicles are known. As vehicles become increasingly complex and the number of components and parts installed within them continues to rise, it is advantageous to minimize the structural space of individual components and the entire drive unit. Summary of the Invention

[0003] The objective of this invention is to provide an improved differential lock device that has a smaller structural space.

[0004] This task is accomplished by a differential lock device having the features of claim 1. Advantageous improvements are the subject of the dependent claims.

[0005] In a first aspect, a differential lock device for a differential transmission is provided. The differential transmission has an input element, a first output element, and a second output element. The differential transmission can be designed as a bevel gear differential transmission or a planetary differential transmission. The differential transmission can have a first gear set element, at least one (e.g., two or four) second gear set elements, and two third gear set elements. The differential lock device has a switching element having a drive member and a sliding sleeve. The drive member is designed for anti-rotational connection with one of the input element, the first output element, and the second output element. The drive member has two drive member engagement sections spaced apart from each other in the axial direction. The sliding sleeve is designed for anti-rotational connection with the other of the input element, the first output element, and the second output element. The drive member can be designed for anti-rotational connection with the input element. Then, the sliding sleeve can be designed for anti-rotational connection with one of the first output element and the second output element. The sliding sleeve is designed to be axially movable relative to the corresponding element of the input element, the first output element, and the second output element. The sliding sleeve has two sliding sleeve engagement sections that are spaced apart from each other in the axial direction.

[0006] The driving element engagement section and the sliding sleeve engagement section are arranged such that the switching element provides a locked switching state and an unlocked switching state. In the locked switching state, the driving element engagement section and the sliding sleeve engagement section are engaged with each other. In the unlocked switching state, one of the driving element engagement sections is arranged axially between the sliding sleeve engagement sections, and one of the sliding sleeve engagement sections is arranged axially between the driving element engagement sections.

[0007] If two elements are mechanically coupled, they are directly or indirectly coupled to each other, such that movement of one element causes a reaction in the other. For example, a mechanically coupled connection can be provided by a form-locking or friction-locking connection. A mechanically coupled connection can be equivalent to the corresponding meshing of two elements. An additional element, such as one or more gear stages, can be placed between the two elements. Conversely, a permanent anti-rotational connection between two elements is understood to be a connection in which the two elements are rigidly coupled to each other for all prescribed states of the transmission. These elements can exist as individual components anti-rotationally coupled to each other, or they can exist as an integral unit. Conversely, an anti-rotational connection can be selectively established or disengaged, or released, between the two elements via a switching element (e.g., a clutch).

[0008] The sliding sleeve can have two switching positions. One switching position can be a locked position, in which the switching element is closed. In the locked position, an anti-rotational connection can be established between the sliding sleeve and the driving member. The other switching position can be an unlocked position, in which the switching element is open. In the unlocked position, the anti-rotational connection between the sliding sleeve and the driving member can be released. The sliding sleeve can move in a first direction, such as axially, so that it can be placed in the locked position. The sliding sleeve can also move, for example, against the first direction, so that it can be placed in the unlocked position.

[0009] The first and second output elements can be arranged coaxially. The first and second output elements can extend in opposite directions in the axial direction. The first and second output elements can be arranged in a manner that allows them to rotate about the same axis of rotation. The axis of rotation can be oriented in the axial direction. The radial direction can be oriented perpendicular to the axial direction. The circumferential direction can extend around the axial direction. The driving element and the sliding sleeve can be arranged coaxially with the axis of rotation.

[0010] The sliding sleeve engagement section and the driving element engagement section can be positioned such that, for the unlocked switching state, an annular gap with a meandering cross-section is provided between the sliding sleeve and the driving element in the circumferential direction. The switching element can be selectively locked or unlocked by the axial movement of the sliding sleeve. This provides a short switching stroke between the locked and unlocked switching states.

[0011] The input element can be connected to a first gear set element (e.g., an input bevel gear) in a rotationally resistant manner. The input element can be designed as a differential housing. The input element can have a first gear set element. A second gear set element (e.g., a compensating bevel gear) and a third gear set element (e.g., an output bevel gear) can be rotatably supported on the input element. The second gear set element can be engaged with the third gear set element. The first and second output elements can each be designed as shafts, such as plug shafts. The first output element can be connected to one of the third gear set elements in a rotationally resistant manner, for example, via a hub connection (e.g., a keyed shaft connection or a keyway shaft connection). The second output element can be connected to the other of the third gear set elements in a rotationally resistant manner, for example, via a hub connection (e.g., a keyed shaft connection or a keyway shaft connection).

[0012] The drive element can be connected to the input element anti-rotationally via a flange located radially externally. The drive element can be welded to the input element, for example. The drive element can be connected to the input element anti-rotationally via a hub connection (such as a keyed shaft connection or a keyway shaft connection), a threaded connection, or a similar connection. The drive element and, for example, the input element can be designed as a single piece. The drive element can have a first drive element engagement section, a second drive element engagement section, or more drive element engagement sections. The drive element engagement sections can be arranged with each section offset from the other by the same amount in the axial direction. The drive element engagement sections can each have the same engagement profile, such as the hub-side profile of a keyed shaft connection.

[0013] The sliding sleeve may have a first sliding sleeve engagement section, a second sliding sleeve engagement section, or more sliding sleeve engagement sections. The sliding sleeve engagement sections may be arranged with each section offset from the other by the same amount in the axial direction. The sliding sleeve engagement sections may each have the same engagement profile, such as the axial profile of a keyed shaft connection.

[0014] In one embodiment of the differential lock device, the drive element engagement sections can be respectively constructed on the inner periphery of the drive element. The sliding sleeve engagement sections can be respectively constructed on the outer periphery of the sliding sleeve.

[0015] The drive component engagement section can be designed as a hub-side irregular portion of a shaft-hub connection (such as a keyed shaft connection or a keyway shaft connection). The sleeve engagement section can be designed as a shaft-side irregular portion of a shaft-hub connection (such as a keyed shaft connection or a keyway shaft connection). By shaping the anti-relative rotation connection between the sleeve and the drive component into a shaft-hub connection, a large force can be transmitted. Therefore, a differential lock device with a small structural space in the radial direction can be provided.

[0016] In one embodiment of the differential lock device, one of the drive engagement section and the sliding sleeve engagement section may have an introductory section for axially guiding one of the sliding sleeve engagement sections into one of the drive engagement sections.

[0017] Both the drive element engagement section and the sliding sleeve engagement section can have a guide section, such as a drive element guide section or a sliding sleeve guide section. The guide section can be designed as, for example, a rounded portion on the end face of a keyway geometry or keyway geometry in the axial direction. Each key or keyway in either the drive element engagement section or the sliding sleeve engagement section can have a guide section. This prevents the movement of the sliding sleeve towards locking position caused by key-to-key contact between the sliding sleeve and the drive element from being hindered.

[0018] The drive element engagement section and the sliding sleeve engagement section can be positioned and / or designed such that, during the closing motion, the drive element engagement section with the guide section and the sliding sleeve engagement section engage with each other first. For example, the axial spacing between the sliding sleeve engagement sections can be smaller than the axial spacing between the drive element engagement sections, or vice versa. For example, the axial extension of the sliding sleeve engagement section with the guide section and / or the drive element engagement section can be greater than the axial extension of the sliding sleeve engagement section without the guide section and / or the drive element engagement section. Thus, the sliding sleeve can be oriented relative to the drive element before the sliding sleeve and drive element are fully engaged. This provides higher switching comfort.

[0019] In one embodiment of the differential lock device, the annular piston for operating the switching element can be arranged in a manner movable in the axial direction. The annular piston can be coupled to a sliding sleeve. The annular piston can be coupled to the sliding sleeve such that axial movement of the annular piston causes axial movement of the sliding sleeve. The annular piston can be arranged coaxially with the axis of rotation.

[0020] The annular piston can be designed to at least segmentally enclose the sliding sleeve and the drive element in the radial direction. The annular piston can be arranged in the gap between the switching element and a stationary component (e.g., the transmission housing). The annular piston can have a stepped shape. The annular piston, drive element, and sliding sleeve can be stacked in the radial direction. The annular piston, drive element, and sliding sleeve can have a nested structure. This provides a differential lock device with a small structural space in both the radial and axial directions. The annular piston can be supported in the stationary component in a manner that allows it to move in the axial direction. The annular piston can be supported in the stationary component via a sliding surface (e.g., an outer sliding surface), for example, supported on the inner circumference. The annular piston can be positioned in the radial direction via the sliding surface.

[0021] In one embodiment of the differential lock device, the annular piston can be coupled to the sliding sleeve via a bearing unit.

[0022] The bearing unit can have a radial bearing, such as a deep groove ball bearing. The bearing unit can also have a thrust bearing. The bearing unit can be arranged coaxially with the annular piston. This provides a differential lock device with a small structural space in both the radial and axial directions. Furthermore, it provides a differential lock device with low frictional losses during switching. Thus, a comfortable switching process is provided even when the switching process is performed during the rotation of the sliding sleeve, and further, during the rotation of the first or second output element.

[0023] In one embodiment of the differential lock device, the annular piston may have a fluid pressure surface designed to move the annular piston axially toward a first side when fluid pressure (e.g., air pressure or oil pressure) is applied. This allows the switching element to close, for example.

[0024] Fluid pressure can generate fluid force on an annular piston. The movement of the annular piston or sleeve can cause the sleeve to close. The annular piston can be designed to be hydraulically or pneumatically operated. The fluid pressure surface of the annular piston can form a fluid space together with the surface of a stationary component. The fluid space can be designed to contain a pressurized fluid, such as air or oil. The fluid pressure surface can be constructed, for example, as an inclined portion on the outer periphery adjacent to the sliding surface of the annular piston.

[0025] The sliding sleeve may have a sliding sleeve stop surface. The annular piston, bearing unit, and sliding sleeve can be designed to move axially toward a first side until the sliding sleeve stop surface abuts against the input element. The sliding sleeve stop surface may be associated with the locking positioning of the sliding sleeve.

[0026] In one embodiment of the differential lock device, the annular piston may have a spring-receiving surface designed to move the annular piston axially toward a second side when a spring force is applied by the spring unit. The second side may be oriented opposite to the first side. This allows the switching element to be disconnected, for example.

[0027] Here, an actuating force, such as a direct flow of fluid force and / or spring force, can be provided. Both fluid force and spring force can act directly on the annular piston. The movement of the annular piston can be directly transmitted to the sliding sleeve, for example, via a bearing unit. This provides a comfortable and reliable switching process.

[0028] The spring receiving surface can be arranged on a first side at the end section in the axial direction. The spring receiving surface can be formed by a recess in the axial direction. The spring receiving surface can be annular in the circumferential direction. The spring receiving surface can be designed as a section for receiving at least one of the spring elements of the spring unit. The spring receiving surface can be columnar in the axial direction. Multiple columnar spring receiving surfaces can be arranged, for example, uniformly distributed in the circumferential direction.

[0029] The spring unit can have spring elements. These spring elements can be designed as helical springs, such as axial compression springs. The spring elements can be arranged in a circumferential direction, for example, uniformly distributed. The spring elements can be arranged radially symmetrically with respect to the axis of rotation in the circumferential direction. The spring elements can be designed to be compressible in the axial direction. The spring elements can be integrated into existing components (such as annular pistons) or existing structural spaces (such as radial structural spaces for the drive components) via spring receiving surfaces. This allows for a differential lock device with a compact structural space in both the axial and radial directions. Furthermore, the spring elements can be designed to be mounted in the annular piston without relying on a sliding sleeve, and the annular piston can be designed to be mounted in a stationary component. This provides a simpler assembly of the entire differential lock device.

[0030] In one embodiment of the differential lock device, the spring unit may be arranged radially outside the section where the sliding sleeve and the drive element engage.

[0031] The spring unit can be arranged radially outside the outer periphery of the driving element. The spring unit can be arranged in the same plane as the switching element and the driving element in the axial direction. The spring unit can extend in a ring shape in the axial direction. The spring unit can be arranged coaxially with the rotation axis. Therefore, the differential lock device has a smaller structural space in the axial direction.

[0032] In one embodiment of the differential lock device, the spring unit may have a support element designed to support the spring element axially on a stationary component.

[0033] The support element can be designed in a ring shape. The support element can be arranged coaxially with the axis of rotation. The support element can be arranged in the same plane as the sliding sleeve and the driving component in the axial direction. The support element can be arranged radially outside the engagement section of the sliding sleeve and the driving component. The support element can be axially offset from the annular piston. The support element can be axially abutted against a stationary component via a retaining ring. The support element can be radially positioned on the inner circumference of a stationary component via its outer periphery.

[0034] The support element may have a spring receiving surface for accommodating a section of at least one of the spring elements. The spring receiving surface may be formed by a recess in the axial direction. The spring receiving surface may be annular in the circumferential direction. The spring receiving surface may be columnar in the axial direction. Multiple columnar spring receiving surfaces may be arranged, for example, uniformly distributed in the circumferential direction. The spring receiving surfaces of the annular piston and the support element may be arranged axially toward each other. The spring element may be arranged axially between the spring receiving surface of the annular piston and the spring receiving surface of the support element.

[0035] As the annular piston moves based on fluid pressure, the pressure spring can be designed to be compressible. The spring force can provide a restoring force, for example, away from the input element towards a second side. The annular piston can provide a piston stop surface. The piston stop surface can be designed in annular shape. When the fluid force is lower than the restoring force, the annular piston can move towards a second side, for example, until the piston stop surface abuts against a stationary component. The piston stop surface can restrict or be adjacent to the fluid space. Thus, the annular piston can easily move away from the piston stop surface in the axial direction, for example, without significant adhesion to the piston stop surface. This also applies to situations where air is used as the fluid.

[0036] In the second aspect, a differential transmission device having a differential lock device according to one of the above embodiments is provided. Therefore, the differential transmission device can have an integrated form-locking differential lock device. Further features, effects, and advantages of the second aspect can be obtained from the first aspect. Furthermore, the features, effects, and advantages of the second aspect are also related to the features, effects, and advantages of the first aspect. The differential transmission device has an input element, a first output element, and a second output element. The input element is designed to input driving force into the differential transmission device. The differential transmission device is designed to distribute the driving force from the input element to the first output element and the second output element.

[0037] The differential transmission can be designed as a bevel gear differential transmission or a planetary differential transmission. The differential transmission can, as described above, have a first gear set element (e.g., an input bevel gear), at least one second gear set element (e.g., a compensating bevel gear), or, for example, four second gear set elements and two third gear set elements (e.g., two output bevel gears). The third gear set elements can be connected to one of the first and second output elements in a rotationally resistant manner. For example, one third gear set element can be connected to the first output element in a rotationally resistant manner, and the other third gear set element can be connected to the second output element in a rotationally resistant manner.

[0038] In one embodiment of the differential transmission, the differential transmission can be designed as a bevel gear differential transmission.

[0039] The input element can be designed as a differential housing. The first gear set element can be designed as an input bevel gear. The input bevel gear can be connected to the differential housing in a rotationally incompatible manner. The second gear set element can be designed as a compensating bevel gear. The differential transmission can have four compensating bevel gears arranged in a star configuration. The third gear set element can be designed as an output bevel gear. The compensating bevel gear can engage with the output bevel gear. The compensating bevel gear and the output bevel gear can be rotatably supported on the differential housing.

[0040] In a third aspect, a vehicle is provided having a differential transmission according to one embodiment of the second aspect. This vehicle can be designed as a passenger vehicle or a commercial vehicle, such as a work machine. Further features, effects, and advantages of the third aspect can be obtained from the second aspect. Furthermore, the features, effects, and advantages of the third aspect are also features, effects, and advantages of the second aspect. The vehicle has a drive unit with a drive shaft for providing driving force, the drive shaft being mechanically operably connected to the input element of the differential transmission. The drive unit can have an engine, such as an internal combustion engine or an electric motor. The drive shaft of the drive unit can be connected to the input element of the differential transmission in a rotationally inverse manner. The vehicle has two drive elements, one of which is mechanically operably connected to a first output element, and the other drive element is mechanically operably connected to a second output element for driving the vehicle.

[0041] The drive element can be designed, for example, as a wheeled or tracked walking mechanism. One of the first and second output elements can be mechanically connected to one of the drive elements, for example, in a rotationally inverse manner. An articulated shaft can be provided between the first or second output element and the corresponding drive element to provide a steering angle or tumble travel. Attached Figure Description

[0042] Figure 1 A cross-sectional view of one embodiment of a differential lock device for a differential transmission is shown;

[0043] Figure 2 A cross-sectional view of this embodiment of the differential lock device is shown;

[0044] Figure 3 A perspective view of one embodiment of the drive mechanism of the differential lock device is shown;

[0045] Figure 4 A perspective view of one embodiment of the sliding sleeve of the differential lock device is shown;

[0046] Figure 5 A top view of a schematic diagram of one embodiment of a vehicle with a drive unit is shown. Detailed Implementation

[0047] Figure 1 A cross-sectional view of one embodiment of a differential lock device for a differential transmission 3 is shown. The differential transmission 3 has an input element 11 (currently a differential housing), a first output element 15 (currently a plug shaft), and a second output element 16 (currently another plug shaft, not shown). The differential transmission 3 is designed to distribute driving force from the input element 11 to the first output element 15 and the second output element 16. The driving force is provided by a drive unit (e.g., an electric motor, not shown). Figure 1 The differential lock device is shown in the unlocking / switching state.

[0048] The differential lock device has switching elements 20 and 30, each having a drive element 20 and a sliding sleeve 30. The drive element 20 is connected to the input element 11 via a flange to resist relative rotation and is currently welded to the input element 11. The drive element 20 has two axially spaced drive element engagement sections 21 and 22 on its inner circumference. The drive element engagement sections 21 and 22 are designed as hub-side profiles of keyway shaft connections and have the same drive profile. The drive element 20 is arranged coaxially with the rotation axis of the first output element 15.

[0049] The sliding sleeve 30 is connected to the first output element 15 in a non-rotating manner on its inner circumference via a hub connection 80 (currently a keyway connection), and is movable relative to the first output element 15 in the axial direction. The sliding sleeve 30 has two axially spaced sliding sleeve engagement sections 31 and 32 on its outer circumference. The sliding sleeve engagement sections 31 and 32 are designed as axially shaped portions of the keyway shaft connection and have the same driving profile. The sliding sleeve 30 is coaxially arranged with the rotation axis of the first output element 15. The sliding sleeve 30 is arranged radially between the drive member 20 and the first output element 15.

[0050] Switching elements 20 and 30 have a locked switching state and an unlocked switching state. Switching elements 20 and 30 can be selectively locked or unlocked via the axial movement of the sliding sleeve. In the locked switching state, the drive member engagement sections 21 and 22 are engaged with the sliding sleeve engagement sections 31 and 32. Thus, the input element 11 is connected to the first output element 15 against relative rotation via the drive member 20 and the sliding sleeve 30. This locks the differential transmission 3 and connects the first output element 15 and the second output element against relative rotation. In the unlocked switching state, the sliding sleeve 30, together with the first output element 15, can rotate about a rotation axis relative to the drive member 20 and the input element 11. Thus, the first output element 15 can rotate about a rotation axis relative to the second output element 16. In the unlocked switching state, the first drive member engagement section 21 is arranged axially between the two sliding sleeve engagement sections 31 and 32. In the unlocked switching state, the second sliding sleeve engagement section 32 is arranged axially between the two drive member engagement sections 21 and 22. In the unlocked switching state, a meandering annular gap is provided between the drive member 20 and the sliding sleeve 30 in the radial direction. Therefore, the sliding sleeve 30 provides a shorter switching stroke between the locked and unlocked switching states.

[0051] The following describes additional advantages of the differential lock device and differential transmission 3.

[0052] An annular piston 40 is arranged coaxially with the rotation axis of the first output element 15, in a manner that allows it to move axially in the stationary component 9 (currently the transmission housing) via a columnar outer sliding surface. The annular piston 40 radially encloses at least a segmented drive member 20 and a sliding sleeve 30. In the unlocked switching state, the annular piston 40 rests against the stationary component 9 with its piston stop surface 45. The sliding sleeve 30 is positioned in the unlocked position. The annular piston 40 has a fluid pressure surface 41. The fluid pressure surface 41 has an inclined portion that, in the unlocked switching state, forms a fluid space 70 with the stationary component 9 for containing fluid (currently air). If fluid pressure is present in the fluid space 70, the annular piston 40 moves axially towards the first side (in...) via fluid force. Figure 1 (The right side is in the middle) moves. Here, the piston stop surface 45 moves axially away from the stationary member 9, increasing the fluid space 70. The annular piston 40 is coupled to the sleeve 30 via the bearing unit 60 (currently a radial deep groove ball bearing). Thus, the axial movement of the annular piston 40 is transmitted to the sleeve 30. The switching elements 20 and 30 can be operated via the annular piston 40. The sleeve 30 can rotate about the rotation axis relative to the annular piston 40 without significant frictional loss.

[0053] A spring unit 50 is provided on the end section of the first side of the annular piston 40. The spring unit 50 has a plurality of spring elements 51 (currently axial compression springs) that are evenly distributed circumferentially and arranged radially symmetrically. The annular piston 40 has a spring receiving surface 42 on the end section of the first side, the spring receiving surface having columnar openings for accommodating the plurality of spring elements 51. Through the spring receiving surface 42, the spring force is directed towards the second side (which is...). Figure 1 The fluid force (left side) acts on the annular piston 40. If the fluid force is less than the spring force, the annular piston 40 moves axially toward the second side until the piston stop surface 45 abuts against the stationary member 9.

[0054] The spring unit 50 has an annular support element 52, which is radially arranged outside the sliding sleeve 30 and the drive member engagement sections 21, 22 and coaxially arranged with the rotation axis of the first output element 15. The support element 52 forms a spring receiving surface for accommodating a plurality of spring elements 51. The spring receiving surface 42 of the annular piston 40 and the spring receiving surface of the support element 52 are arranged axially toward each other. A plurality of spring elements 51 are arranged axially between the spring receiving surface 42 of the annular piston 40 and the spring receiving surface of the support element 52. The support element 52 is positioned on the stationary member 9 via its outer periphery. The support element 52 is axially abutted against the stationary member 9 via a retaining ring. Thus, the support element 52 can support the spring force on the stationary member 9 in the axial direction.

[0055] The differential transmission 3 is currently designed as a bevel gear differential transmission. The differential transmission 3 has a first gear set element 12 (currently an input bevel gear), four second gear set elements 13 (currently compensating bevel gears), and two third gear set elements 14 (currently output bevel gears), not shown. The second gear set elements 13 and third gear set elements 14 are engaged with each other. One of the two third gear set elements 14 is connected to the first output element 15 via a hub connection 80 in a rotationally intolerant manner. The other of the two third gear set elements 14 is connected to the second output element 16 via a hub connection.

[0056] Figure 2 A cross-sectional view of the schematic diagram of this embodiment of the differential lock device is shown. Figure 2 The differential lock device in the locked switching state is shown. The slide sleeve 30 moves to the first side until the slide sleeve stop surface 35 abuts against the input element 11. The slide sleeve 30 is positioned in the locked position. The drive element engagement sections 21, 22 are engaged with the slide sleeve engagement sections 31, 32. The spring element 51 of the spring unit 50 is compressed in the axial direction. The fluid space 70 increases.

[0057] Figure 3A perspective view of one embodiment of the drive member 20 of the differential lock device is shown. The first drive member engagement section 21 has a plurality of drive member guide sections 23 on its end side in the axial direction on the second side. The drive member guide sections 23 are designed as rounded portions at the end side in the axial direction of each key tooth of the hub-side profile.

[0058] Figure 4 A perspective view of one embodiment of the differential lock device's sliding sleeve 30 is shown. The first sliding sleeve engagement section 31 has a plurality of sliding sleeve guide sections 33 on its axially oriented end side on a first side. The sliding sleeve guide sections 33 are designed as rounded portions at the axially oriented end side of each key tooth of the axially oriented profile.

[0059] In one embodiment of the differential lock device, the first drive member engagement section 21 and the first sliding sleeve engagement section 31 are respectively provided with guide sections 23 and 33, which are located on the sides of the first drive member engagement section 21 and the first sliding sleeve engagement section 31 facing each other. Thus, when the sliding sleeve 30 moves from the unlocked position to the locked position, the guide sections 23 and 33 are first engaged, and the sliding sleeve 30 is oriented relative to the drive member 20 in the circumferential direction. Subsequently, the sliding sleeve engagement sections 31 and 32 are engaged with the drive member engagement sections 21 and 22. Therefore, when the sliding sleeve 30 moves from the unlocked position to the locked position, key-to-key contact between the sliding sleeve 30 and the drive member 20 is prevented.

[0060] Figure 5 A top view of a schematic diagram of one embodiment of a vehicle with a differential transmission 3 is shown. The vehicle has a drive unit 1 with an engine. The engine has a drive shaft 2, which is connected to an input element 11 in a rotationally inverse manner. A first output element 15 and a second output element 16 are respectively connected to the vehicle's drive elements (currently wheels) via hinge shafts in a rotationally inverse manner for propelling the vehicle forward.

[0061] List of reference numerals

[0062] 1 drive unit

[0063] 2 drive shafts

[0064] 3 Differential transmission device

[0065] 9. Static components

[0066] 11 input elements

[0067] 13 Second gear set components

[0068] 14 Third gear set components

[0069] 15 First Output Element

[0070] 16 Second Output Element

[0071] 20 drive components

[0072] 21 First drive component engagement section

[0073] 22 Second drive component engagement section

[0074] 23 Drive component introduction section

[0075] 30 Slide

[0076] 31 First Sliding Sleeve Engagement Section

[0077] 32 Second Sliding Sleeve Engagement Section

[0078] 33 Sliding sleeve entry section

[0079] 35 Sliding Sleeve Stop Surface

[0080] 40 ring piston

[0081] 41 Fluid pressure surface

[0082] 42 Spring receiving surface

[0083] 45 Piston Stop Face

[0084] 50 spring units

[0085] 51 Spring Components

[0086] 52 Supporting Elements

[0087] 60 bearing unit

[0088] 70 Fluid Space

[0089] 80 shaft hub connection

Claims

1. A differential lock device for a differential transmission (3), the differential transmission having an input element (11), a first output element (15), and a second output element (16), wherein, The differential lock device has switching elements (20, 30), which have a drive element (20) and a sliding sleeve (30). The drive element (20) is designed to be connected to one of the input element (11), the first output element (15) and the second output element (16) in a rotationally resistant manner, and has two drive element engagement sections (21, 22) spaced apart from each other in the axial direction. The sliding sleeve (30) is designed to be connected to another element among the input element (11), the first output element (15), and the second output element (16) in a rotationally resistant manner and to be movable relative to the other element in the axial direction, and has two sliding sleeve engagement sections (31, 32) spaced apart from each other in the axial direction. The drive engagement sections (21, 22) and the sliding sleeve engagement sections (31, 32) are arranged such that the switching elements (20, 30) are... A locking switching state is provided, in which the driving member engagement section (21, 22) and the sliding sleeve engagement section (31, 32) are engaged with each other, and An unlocking switching state is provided, in which one of the drive member engagement sections (21, 22) is arranged in the axial direction between the sliding sleeve engagement sections (31, 32), and one of the sliding sleeve engagement sections (31, 32) is arranged in the axial direction between the drive member engagement sections (21, 22).

2. The differential lock device according to claim 1, characterized in that, The drive member engagement sections (21, 22) are respectively constructed on the inner periphery of the drive member (20), and the sliding sleeve engagement sections (31, 32) are respectively constructed on the outer periphery of the sliding sleeve (30).

3. The differential lock device according to any one of the preceding claims, characterized in that, One of the drive member engagement sections (21, 22) and the sliding sleeve engagement sections (31, 32) has an introductory section (23, 33) for axially introducing one of the sliding sleeve engagement sections (31, 32) into one of the drive member engagement sections (21, 22).

4. The differential lock device according to any one of the preceding claims, characterized in that, The annular piston (40) for manipulating the switching elements (20, 30) is arranged in a manner that allows it to move in the axial direction and is coupled to the sliding sleeve (30).

5. The differential lock device according to claim 4, characterized in that, The annular piston (40) is coupled to the sliding sleeve (30) via a bearing unit (60).

6. The differential lock device according to any one of claims 4 and 5, characterized in that, The annular piston (40) has a fluid pressure surface (41) which is designed to move the annular piston (40) toward a first side in the axial direction when fluid pressure is applied.

7. The differential lock device according to any one of claims 4 to 6, characterized in that, The annular piston (40) has a spring receiving surface (42) designed to move the annular piston (40) toward a second side in the axial direction when the spring force of the spring unit (50) is applied.

8. The differential lock device according to claim 7, characterized in that, The spring unit (50) is arranged in the radial direction outside the sliding sleeve (30) and the drive member engagement section (21, 22).

9. The differential lock device according to any one of claims 7 and 8, characterized in that, The spring unit (50) has a support element (52) designed to support the spring element (51) in the axial direction on a stationary member (9).

10. A differential transmission device (3), the differential transmission device comprising a differential lock device according to any one of claims 1 to 9, an input element (11), a first output element (15), and a second output element (16), wherein, The input element (11) is designed to input driving force into the differential transmission (3), and The differential transmission (3) is designed to distribute the driving force from the input element (11) to the first output element (15) and the second output element (16).

11. The differential transmission device (3) according to claim 10, characterized in that, The differential transmission device (3) is designed as a bevel gear differential transmission device.

12. A vehicle having a differential transmission (3), a drive unit (1), and two drive elements according to any one of claims 10 and 11, wherein, The drive unit (1) has a drive shaft (2) for providing driving force, the drive shaft being mechanically connected to the input element (11) of the differential transmission device (3), and One of the two drive elements is mechanically connected to the first output element (15), and the other of the two drive elements is mechanically connected to the second output element (16) for driving the vehicle.

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