ACTUATOR UNIT
Patent Information
- Application Number
- DE502020011153
- Authority / Receiving Office
- DE · DE
- Patent Type
- Patents
- Current Assignee / Owner
- Priority Date
- 2019-01-16
- Filing Date
- 2020-01-14
- Publication Date
- 2025-06-18
- Estimated Expiration
- 2040-01-14
AI Technical Summary
Existing transmission systems face difficulties in assembly and maintenance due to the separate and disparate positioning of components, leading to complex assembly planning and increased risk of incorrect assembly.
A transmission system with an integrated actuator unit that includes a housing with positioning and centering pins, allowing for error-free mounting and easy assembly and maintenance by treating the actuator unit as a self-contained component.
The solution simplifies assembly and maintenance by ensuring correct alignment and mounting of the actuator unit, reducing assembly time and preventing incorrect assembly, while also allowing for easier integration with transmission control systems.
Description
[0001] The present invention relates to a transmission.
[0002] Transmissions are shifted using one or more actuating elements that engage and deflect shift elements of the transmission. The deflection of a shift element into a shift position causes a rotationally fixed connection, for example, between a gearwheel and a shaft to be established or released. Accordingly, a gear of the transmission is engaged or disengaged. The shift element is usually in contact with other elements of the transmission, such as a shift sleeve. If no gear is engaged, the shift element is in a neutral shift position.
[0003] The term "shift element" is to be understood as representative of all elements of a transmission that are designed to engage or disengage a gear of the transmission. For example, a shift element is followed by a linkage that connects the shift element to a shift fork, which is ultimately designed to move the shift sleeve. However, transmission designs are also conceivable that allow, for example, direct access to the shift forks. Furthermore, transmissions can be provided whose shift elements do not have shift forks. Shift forks and linkages are also to be understood as shift elements below. Therefore, the term "shift element" is to be understood as a generic term for these elements below.
[0004] In addition, information as to whether a shift element is disengaged is advantageous in order to further process this information, for example within a transmission control system.
[0005] In today's transmissions, all components that perform the functions described above are provided separately or arranged in different positions, making assembly and disassembly difficult. These disadvantages are particularly noticeable during assembly planning or pre-assembly, which, for example, do not take place at the same location as the final assembly.
[0006] For example, CN 108 561 549 A discloses a pneumatic automatic control device for a triaxial transmission and a control method of the pneumatic automatic control device for the triaxial transmission. The pneumatic automatic controller consists of a housing, electromagnetic valves, three piston rods, switch blocks, three follower levers, and three angle sensors. Three air cylinders are arranged on one side of the casing, and the piston rods are respectively arranged in the air cylinders. Each piston rod is provided with a switch block, and each switch block is movably connected to the annular displacement sensor of the corresponding follower lever. Linear movements of each switch block drive the corresponding follower lever. An extension direction of each switch block is perpendicular to the axial direction of the corresponding piston rod, while the front end extends out of the housing.An electromagnetic valve group is arranged outside the housing, with the air cylinders being connected to a high-pressure air source of a vehicle via the electromagnetic valves.
[0007] US 2018 / 0231105 A1 discloses a drive system with an automatic transmission for an electric vehicle. At least one 3-position linear motor and a 2-way clutch are included in the transmission. The transmission also includes a planetary gear set. A magnetic coupling device is provided to magnetically transfer a portion of the rotating mechanical energy of a single electric drive unit or motor to a transmission output shaft in response to an electrical signal in order to synchronize the angular velocities of the transmission output shaft and an output shaft of the electric drive during a state change.
[0008] DE 10 2005 028122 A1 discloses an automated countershaft transmission, in particular an automated manual transmission or dual-clutch transmission, comprising a housing, at least two shafts aligned in the longitudinal direction, a plurality of shift clutches for establishing corresponding gear ratios, the shift clutches being actuated in the longitudinal direction by means of a mechanical shift arrangement, and an actuator arrangement for the automated actuation of the shift arrangement, the actuator arrangement comprising at least one hydraulic shift cylinder acting in the longitudinal direction, a hydraulic circuit with electrically controlled hydraulic valves, and an electrical control device designed to control the hydraulic valves.The switching cylinders, the hydraulic valves and the control device form a pre-assembled mechatronic module which is attached to the side of the housing in such a way that the switching cylinder(s) are coupled to the switching arrangement.
[0009] DE 10 2014 105899 A1 relates to an actuator arrangement for a shifting arrangement of a motor vehicle transmission, wherein the shifting arrangement has a plurality of shifting elements for engaging and disengaging gear stages of the motor vehicle transmission, with an actuator housing, with a plurality of hydraulic cylinders that are fixed to the actuator housing parallel to one another and that can each be coupled to one of the shifting elements of the motor vehicle transmission. A fluid distribution device with a rotary slide valve device is integrated into the actuator housing, by means of which a pressure connection of the actuator housing can be connected to one of the hydraulic cylinders.
[0010] US 8,738,257 B2 relates to a hydraulic control system for a dual-clutch transmission, comprising a plurality of pressure and flow control devices and logic valve assemblies in fluid communication with a plurality of clutch actuators and a plurality of synchronizer actuators. The clutch actuators are operable to actuate a plurality of torque-transmitting devices, and the synchronizer actuators are operable to actuate a plurality of synchronizer assemblies. Selective activation of combinations of the pressure control solenoid valves and the flow control solenoid valves causes pressurized fluid to activate at least one of the clutch actuators and the synchronizer actuators to shift the transmission into a desired gear ratio.
[0011] JP H07 127739 A relates to the provision of an electronically controlled transmission using a shift mechanism with a shift drum. The shift drum of the shift mechanism for shifting synchronizers of a transmission mechanism consists of split shift drum bodies, and the split shift drum bodies are arranged above the corresponding synchronizer to support them through a common drive shaft. A rack and pinion mechanism is provided for driving this drive shaft, and corresponding shift forks are directly driven by the split shift drum bodies.
[0012] DE 10 2017 115069 A1 relates to a transmission actuator for engaging and disengaging gears and / or for shifting gears of a manual transmission, such as a dual-clutch transmission, of a motor vehicle, having an adjusting unit for translationally and rotationally moving a selector shaft with a first actuating mechanism fastened to the selector shaft, which is designed to actuate a first gear set arrangement, and a second actuating mechanism fastened to the selector shaft, which is designed to actuate a second gear set arrangement, wherein the first actuating mechanism is arranged on one side of the adjusting unit and the second actuating mechanism is arranged on the other side of the adjusting unit.
[0013] DE 10 2008 015173 A1 relates to a transmission for a motor vehicle, with a transmission housing which has an interior space delimited by a housing base, with an oil pan which is arranged on a side facing away from the interior space on the housing base, with an actuator block which is arranged in the interior space on the housing base and which has a plurality of hydraulic shift actuators for actuating shift elements of the transmission, and with a hydraulic block for hydraulically controlling the shift actuators, which is arranged in the oil pan on a side facing away from the interior space on the housing base.
[0014] DE 10 2016 101591 A1 relates to a shift arrangement for a motor vehicle transmission with a housing which defines a longitudinal axis, with at least a first and a second shift rod which are mounted axially displaceably with respect to the housing for engaging and disengaging respective associated gear stages, and with a hydraulic arrangement which has at least a first and a second hydraulic cylinder, wherein the first hydraulic cylinder is designed to axially displace the first shift rod in at least one axial direction, wherein the second hydraulic cylinder is designed to axially displace the second shift rod in at least one axial direction, wherein the first and the second hydraulic cylinder are fixed to a common hydraulic cylinder carrier.The first and second hydraulic cylinders are connected to the associated shift rods in such a way that the first and second shift rods extend in opposite directions from the hydraulic cylinder carrier.
[0015] Therefore, it is an object of the present invention to provide a transmission which has all the functionalities described above and at the same time solves the problem described above.
[0016] This problem is solved by the subject matter of the independent claim. Advantageous further developments are the subject matter of the dependent claims.
[0017] According to the invention, a transmission with at least two switching positions has an actuator unit with an actuating element which is designed to set the at least two switching positions in the transmission, wherein the actuator unit has a housing which is provided in a housing of the transmission and the actuator unit is provided as a separate unit within the housing of the transmission.
[0018] The transmission optionally has a mounting portion configured for mounting the actuator unit with a mounting orientation and / or positioning relative to the actuator unit, wherein neither the mounting portion nor said mounting orientation are part of the present invention.
[0019] According to the invention, the actuator unit has a positioning relative to the transmission, which has positioning and / or centering pins, wherein the positioning and / or centering pins are designed such that they allow mounting of the actuator unit on the transmission only in a specific orientation, for which purpose the positioning and / or centering pins provided on the actuator unit and / or on the transmission are inserted into corresponding openings on the transmission and / or on the actuator unit in order to ensure error-free mounting.
[0020] Accordingly, the actuator unit has a mounting orientation, in particular the housing relative to a gearbox. This means that the side of the housing with which it is mounted in the gearbox, preferably in the gearbox housing, has a geometry that is in particular not point-symmetric. At the same time, a side of the gearbox on which the actuator unit is mounted also has such a complementary geometry, wherein both geometries must be engaged for assembly, for which purpose the actuator unit and the gearbox must be aligned accordingly. Thus, mounting the actuator unit on the gearbox with the housing incorrectly aligned is ruled out.
[0021] The mounting orientation and / or positioning are preferably designed to engage with a mounting orientation and / or positioning of the transmission.
[0022] According to the present invention, the transmission has at least two shift positions. Preferably, one of the at least two shift positions comprises a neutral position or a reverse gear of the transmission. In a preferred embodiment, the transmission is provided as a two-speed transmission, with two shift positions being configured as drive gears, i.e., as a first and a second gear, or as forward and reverse gears, and a third shift position being provided, which is configured as a neutral position.
[0023] The transmission has the actuator unit as described above, wherein the actuator unit is designed to actuate the transmission, in particular to set at least two shift positions in the transmission. The transmission is therefore advantageously easy to assemble and maintain, since the actuator unit can be removed or replaced as a unit. This can significantly shorten assembly and maintenance times. Furthermore, the risk of incorrect assembly can be prevented by aligning the housing of the actuator unit with the transmission.
[0024] The actuator unit is designed to be positionable within the transmission such that the actuating element extends into the interior of the transmission. According to the present invention, the entire actuator unit is provided within the transmission.
[0025] The actuator unit preferably has at least one signal interface designed to receive a control signal and / or output a status signal. The control signal is preferably designed to communicate a target shift position to the control means. The control means itself is further preferably designed to determine a current shift position from the control signal, particularly preferably from the target shift position and the position of the actuating element along the actuation direction, and to control the actuator accordingly in order to adjust the current shift position to the target shift position. The status signal preferably contains information about an existing actual shift position. This information can be processed by further processing means outside the transmission.
[0026] If no control means is provided in the actuator unit, the received control signal is preferably designed to control the actuator within the actuator unit and / or further elements for operating the actuator unit.
[0027] The at least one signal interface is preferably designed to transmit information obtained within the actuator unit, for example, by a detection means or a control means, to another element inside or outside the actuator unit. Such information can be transmitted, for example, as a switching position or a position of the actuating element.
[0028] The signal interface is preferably designed to connect to a vehicle network, such as a CAN bus, or to a higher-level instance, such as a transmission control unit.
[0029] The at least one signal interface is preferably designed to connect to an element outside a transmission housing for receiving the control signal. The at least one signal interface of the actuator unit is preferably designed to extend through the transmission housing, for example, through an opening in the transmission housing. Alternatively or additionally, the actuator unit has at least one energy interface designed to receive energy for operating the actuator unit.
[0030] The at least one energy interface is preferably designed to connect to an element outside the transmission housing for receiving the energy. The at least one energy interface of the actuator unit is preferably designed to extend through the transmission housing, for example, through an opening in the transmission housing.
[0031] The actuating element is preferably designed to engage with at least one shifting element of the transmission to set the at least two shift positions. Furthermore, the engagement can preferably be designed as a permanent engagement, whereby a displacement of the actuating element always influences the shifting element, preferably a displacement or deflection of the shifting element.
[0032] Furthermore, the actuating element is preferably designed to be displaced parallel to an actuating direction.
[0033] The actuator unit can be provided as a separate component in a gearbox, making installation and removal for assembly or maintenance purposes easier since only one component is affected.
[0034] The actuating element is preferably formed integrally with the at least one shifting element. This allows for further integration of components of the transmission into the actuator unit. For example, the actuating element is formed integrally with a shift fork, which corresponds to and preferably engages a corresponding shift sleeve of the transmission or another shifting element.
[0035] The housing is preferably designed to be fastened in the transmission by means of fastening means, for example by means of screws. Further preferably, the housing of the actuator unit itself can have connecting elements which are designed to come into contact with corresponding connecting elements of the transmission, preferably with connecting elements of the housing of the transmission, in order to achieve fixation or at least alignment of the actuator unit within the transmission. Connections formed by such connecting elements can, for example, be designed as tongue and groove connections. The transmission is preferably designed for an electrically powered vehicle, preferably for a commercial vehicle.
[0036] The actuator unit preferably has an actuator which is designed to displace the actuating element parallel to the actuating direction.
[0037] The actuator is preferably designed as a fluidic actuator, in particular as a pneumatic or hydraulic actuator. Alternatively, the actuator is preferably designed as an electromechanical or motor-driven actuator. Thus, the power supply of the actuator unit or actuator can be easily solved by appropriately designing the cable routing, since corresponding fluidic lines or lines for supplying electrical current can be easily routed in existing gaps.
[0038] Preferably, in the case of a fluidic design, particularly a pneumatic or hydraulic design, actuators designed to actuate the actuator are provided within the actuator unit, preferably within the housing of the actuator unit. Such actuators are, for example, solenoid valves designed to control the fluid flow.
[0039] The actuator unit preferably has at least one control means which is designed to control the actuator unit.
[0040] Preferably, the actuator unit has at least one detection means which is designed to detect a position of the actuating element along the actuating direction.
[0041] The at least one control means is preferably designed as an electronic control means. Such a control means can preferably comprise an electronic control unit configured to control the actuator unit.
[0042] The at least one detection means is preferably designed as a displacement sensor. Such a displacement sensor can be of any known design.
[0043] For example, this sensor can work according to an electromagnetic principle.
[0044] Particularly preferably, the sensor is designed as a Hall sensor. Alternatively, the displacement of the actuating element can be used to trigger a movement of another element, for example, a rotational movement, via a mechanical coupling. This rotational movement preferably increments a counter, particularly preferably in the control means, so that the position of the actuating element can be derived from the counter value.
[0045] The detection means is preferably formed integrally with the control means. This advantageously enables a compact design, so that the actuator unit as a whole can be constructed in a compact manner. The actuation direction is preferably designed as a straight line or a circular path. In general, designs of the actuation direction can also be provided that include both circular and straight line elements.
[0046] The transmission has a transmission housing and is further designed to completely accommodate the actuator unit in the transmission housing.
[0047] The invention is not limited to the embodiments described above. Further embodiments can also be achieved by combining, replacing, or omitting individual features.
[0048] Preferred embodiments of the invention are described below with reference to the accompanying drawings.
[0049] In detail Fig. 1 shows a first embodiment of an actuator unit to which the present invention is applicable, and Fig. 2 shows a second embodiment of an actuator unit to which the present invention is applicable.
[0050] Fig. 1 shows a first embodiment of an actuator unit A to which the present invention is applicable.
[0051] An actuator unit A is shown which is provided within a transmission G, ie within a transmission housing of the transmission G.
[0052] The actuator unit A has a housing 7, which is designed to be provided within the transmission G, for example, within the transmission housing. Furthermore, the housing 7 is designed to seal against the transmission G, so that the actuator unit A can be provided as a separate unit within the transmission G.
[0053] The housing 7 has an opening 8 through which an actuating element 5 passes. The actuating element 5 extends with its right-hand end in the drawing into the transmission G. The actuating element 5 is designed to engage with at least one shift element (not shown) of the transmission G in order to set at least two shift positions in the transmission G.
[0054] The housing 7 of the actuator unit A contains an actuator 4, which is connected to the actuating element 5. The actuator 4 is designed to displace the actuating element 5 parallel to an actuating direction X.
[0055] The actuating direction X is designed here as a straight line, so that a displacement of the actuating element 5 parallel to the actuating direction X corresponds to a translational displacement of the actuating element 5. Furthermore, the housing 7 of the actuator unit A contains a detection means 2 which is designed to detect a position of the actuating element 5 parallel to the actuating direction X. This makes it possible to determine the position of the actuating element 5 parallel to the actuating direction X, which also enables an indirect determination of the shift position in the transmission G, since the actuating element 5 is engaged with a shift element and thus its position can be determined from the position of the actuating element 5.
[0056] Furthermore, the housing 7 contains a control means 1, which is designed to control the actuator unit A. For this purpose, the control means 1 is designed to control the actuator 4 in order to initiate a displacement parallel to the actuation direction X of the actuating element 5. Furthermore, the control means 1 is designed to receive control signals from a higher-level entity, for example, a transmission control device.
[0057] The housing 7 of the actuator unit A further comprises a signal interface 3, which is designed to receive control signals from a higher instance, for example, a transmission control device, and to make them available to the control means 1. In the embodiment shown, the signal interface 3 penetrates the boundary of the transmission G, i.e., in particular, the transmission housing of the transmission G. The signal interface 3 is further designed to transmit status signals, for example, a gear position, to devices outside the transmission, for example, to the transmission control device.
[0058] Furthermore, an energy interface 6 is shown, which, like the signal interface 3, penetrates the transmission housing of the transmission G. The energy interface 6 is designed to receive energy for operating the actuator unit A and to supply it to corresponding elements of the actuator unit A, in particular the control means 1, the detection means 2, and the actuator 4.
[0059] Both the signal interface 3 and the energy interface 6 are designed to connect to elements outside the gearbox G and to receive signals or energy via them.
[0060] Fig. 2 shows a second embodiment of an actuator unit A to which the present invention is applicable.
[0061] The structure of this actuator unit A is essentially the same as the actuator unit A from Fig. 1 identical. However, there is a difference in the attachment to the gearbox G.
[0062] The transmission G is essentially indicated here by a transmission housing 10, which is shown in section and open to the left. Further elements of the transmission G have not been shown for reasons of clarity. The actuator unit A is inserted into the transmission housing 10 from the left, so that the actuating element 5 is located inside the transmission G and is designed to set at least two switching positions.
[0063] The actuator unit A and the transmission housing 10 are designed to be fastened with fastening elements 9, for example, with screws. This fixes and positions the actuator unit A relative to the transmission G. For fastening, the actuator unit A has fastening sections 11. The actuator unit A thus closes the left opening of the transmission housing 10.
[0064] The signal interface 3 and the energy interface 6 of the actuator unit A are provided on the actuator unit A such that they are positioned outside the gear housing 10. As a result, these interfaces 3, 6 can easily come into contact with other elements outside the gear G without the need for additional openings in the gear housing 10.
[0065] It is understood that embodiments can also be provided in which an opening for introducing the actuator unit A extends only over part of a housing width of the transmission G.
[0066] The following description of the functioning of the actuator unit A and of specific embodiments is made with reference to both figures, unless otherwise stated.
[0067] The functioning of the actuator unit A is as follows.
[0068] If a control signal is transmitted to the actuator unit A via the signal interface 3, it is processed in the control means 1. The control means 1 is designed to determine which shift position currently prevails in the transmission G based on the position of the actuating element 5 detected by the detection means 2. If the prevailing shift position (actual shift position) does not correspond to the shift position that was transmitted to the control means 1 via the control signal (desired shift position), the control means 1 controls the actuator 4 and thereby causes the actuating element 5 to be moved parallel to the confirmation direction X. As a result, a new shift position is set within the transmission G and thus a gear or a neutral position is engaged.
[0069] The actuator unit A is thus designed as a separate and self-contained unit, which as such can be installed in the gearbox G. The housing 7 of the actuator unit A is designed to be fixed in the gearbox G. For this purpose, for example, screw connections are provided between the housing 7 and the gearbox G.
[0070] The actuator unit A discussed here can be available in a variety of designs, which will be explained in more detail below.
[0071] For example, the actuator 4 can be designed as a fluidic actuator, in particular as a hydraulic or pneumatic actuator. In such an embodiment, the energy interface 6 is designed to conduct fluid, i.e., hydraulic fluid or compressed air, to the actuator 4 in order to provide it with pressure and thus energy for operating the actuator unit A.
[0072] If, however, the actuator 4 is designed electromechanically or electrically, and here in particular as an electric motor or as a magnetic mechanism, the energy interface 6 is designed as an electrical interface which supplies energy in the form of electrical current to the actuator 4 for operating the actuator unit A.
[0073] The control means 1 can be designed, for example, as an electronic control means, in particular as a control unit. In such a case, it is connected to the
[0074] Signal interface 3, in particular for receiving control signals, wherein the signal interface 3 is designed as an electronic interface, in particular as a data interface, via which control data, for example of a vehicle in which the transmission G is provided, can be transmitted to the actuator unit A and thus to the control means 1.
[0075] A further embodiment to which the present invention is applicable does not have a control means 1 within the housing 7. Here, the control means 1 is provided outside the housing 7, for example, being mounted on the housing 7. However, the control means 1 can also be provided remotely from the housing 7, for example, a connection being provided between the signal interface 3 and the control means 1 to enable, on the one hand, the control of the actuator unit A, in particular the actuator 4, and, on the other hand, the reception of data, in particular by the detection means 2.
[0076] Furthermore, the detection means 2 can be designed, for example, as an electronic sensor. Signals corresponding to the position of the actuating element 5 parallel to the actuating direction X can then be made available to an electronic control means 1 via a data connection. Alternatively, however, the detection means 2 can also be designed mechanically or electromechanically. A displacement of the actuating element 5 parallel to the actuating direction X can, for example, cause a mechanical effect in the detection means 2, for example a rotational movement, which can be detected electronically and summed as an angular sum and thus transmitted to the control means 1 to determine the position of the actuating element 5 parallel to the actuating direction X.
[0077] In the embodiment shown, the signal interface 3 and the power interface 6 are depicted as penetrating the boundary of the transmission G, i.e., in particular, the transmission housing of the transmission G. In another embodiment, however, at least one of these interfaces 3, 6 can also be configured such that it is located only within the transmission G. In this case, the transmission G is configured to supply the corresponding interface 3, 6 accordingly.
[0078] If the actuator 4 is designed to be fluidic, for example, actuators, in particular solenoid valves, are provided to regulate the fluid flow. These are then also provided, for example, within the actuator unit A, in particular within the housing 7, so that the character of the actuator unit A as a self-contained component is not compromised. These actuators are designed, for example, to be controlled by the control means 1. In this way, the control means 1 is able to control the fluid flow and actuate the actuator 4 accordingly.
[0079] In the embodiment shown, the actuating element 5 is designed as a rod which extends from the actuator 4 to the right through the opening 8 into the gear G. A displacement of the actuating element 5 parallel to the actuating direction X is provided as a translational displacement which occurs along a rod axis. In addition, however, embodiments can be provided in which, for example, the actuating element 5 is not designed as a rod which is designed to be displaceable along its rod axis. For example, a pivotable actuating element 5 can be provided. Furthermore, the actuating direction X does not have to correspond to a straight line; for example, the actuating element 5 can also be designed to execute a circular movement or another type of movement when actuated.
[0080] The opening 8, together with the actuating element 5, can be designed to seal against the gear G, so that in particular no oil or abrasion from the gear G can penetrate into the housing 7 of the actuator unit A.
[0081] In the embodiment from Fig. 2 The actuator unit A can be designed to seal against the transmission housing 10. For this purpose, a seal can be provided, for example, on an area of the actuator unit A, for example on a fastening section 11, which comes into contact with the transmission housing 10. This ensures a secure closure of the transmission housing 10 against external influences, such as dirt or dust.
Claims
1. Transmission (G) with at least two shift positions, having: an actuator unit (A) having: an actuating element (5) which is designed to adjust the at least two shift positions in the transmission (G), and a housing (7) which is provided in a housing of the transmission (G), wherein the actuator unit (A) is provided as a separate unit within the housing of the transmission (G), characterized in that the actuator unit (A) has, relative to the transmission (G), a positioning which has positioning and / or centring pins, wherein the positioning and / or centring pins are designed such that they allow assembly of the actuator unit only in a specific orientation on the transmission, for which purpose the positioning and / or centring pins, which are provided on the actuator unit and / or on the transmission, are inserted into corresponding openings on the transmission and / or on the actuator unit to ensure error-free assembly.
2. Transmission (G) according to claim 1, wherein the actuating element (5) is designed to engage with at least one shifting element of the transmission (G) in order to adjust the at least two shift positions, and / or wherein the actuating element (5) is designed to be displaced parallel to an actuation direction (X).
3. Transmission (G) according to claim 2, wherein the actuating element (5) is formed integrally with at least one shifting element for the transmission (G).
4. Transmission (G) according to any one of the preceding claims, having an actuator (4) which is designed to displace the actuating element (5) parallel to the actuation direction (X).
5. Transmission (G) according to claim 4, wherein the actuator (4) is designed as a pneumatic, hydraulic, electromechanical or motorised actuator.
6. Transmission (G) according to claim 5, wherein in a pneumatic or hydraulic configuration of the actuator (4), actuating members which are designed to actuate the actuator (4) are provided in the actuator unit (A).
7. Transmission (G) according to any one of the preceding claims, having: - at least one control means (1) which is designed to control the actuator unit (A), and / or - at least one detection means (2) which is designed to detect a position of the actuating element (5) along the actuation direction (X).
8. Transmission (G) according to claim 7, wherein the at least one control means (1) is designed as an electronic control means, or wherein the at least one detection means (2) is designed as a path sensor.
9. Transmission (G) according to claim 7 or 8, wherein the at least one control means (1) and the at least one detection means (2) are integrally formed.
10. Transmission (G) according to any one of the preceding claims, having: - at least one signal interface (3) which is designed to receive a control signal and / or to emit a status signal, and / or - at least one power interface (6) which is designed to receive power for operation of the actuator unit.
11. Transmission (G) according to claim 10, wherein the at least one signal interface (3) is designed to establish a connection to an element outside the housing of the transmission (G) in order to receive the control signal, and / or wherein the at least one power interface (6) is designed to establish a connection to an element outside the housing of the transmission (G) in order to receive the power.
12. Transmission (G) according to any one of the preceding claims, wherein the actuation direction (X) is designed as a straight line or as a circular path.
13. Transmission (G) according to any one of the preceding claims, wherein the housing (7) of the actuator unit (A) has the positioning.
14. Transmission (G) according to any one of the preceding claims, wherein the transmission (G) is designed for an electrically driven vehicle, preferably for a utility vehicle.