Automated gear shifting transmission

Abstract

The invention relates to an automated shift transmission (114) for a motor vehicle, the shift transmission having a transmission housing (112), the transmission housing having a detachable cover (10), on which a transmission shift unit (26) is arranged, wherein the transmission shift unit (26) has actuators (30, 32, 34) for actuating shift forks (120, 122, 124) respectively assigned to the actuators, and wherein each shift fork can be used to coaxially displace an associated shift sleeve of the shift transmission (114) relative to a transmission shaft. According to the invention, a longitudinal guide (110) extending parallel to the longitudinal axis (50) of the shifting transmission (114) is fastened in a transmission housing (112), at least two shift forks are received on the longitudinal guide (110) in a longitudinally displaceable manner, each shift fork having a coupling arm (132, 134, 136) arranged eccentrically with respect to the longitudinal guide (110), and each actuator (30, 32, 34) having an axially displaceable coupling arm (62, 66) with a coupling geometry (62, 66). 4, 66), and each coupling arm (132, 134, 136) cooperates with the respectively assigned coupling geometry (62, 64, 66) of the respectively assigned actuator in the assembled state of the cover (10) and the transmission housing (112) in such a way that the linear movement of the actuator's operating rod (40, 42, 44) can be transmitted to the shift fork (120, 122, 124) for moving the shift fork on the longitudinal guide (110).

Description

Technical Field

[0001] The invention relates to an automated shift transmission for a motor vehicle, wherein a transmission housing has a detachable cover on which a transmission shift unit is arranged, wherein the transmission shift unit has actuators for actuating shift forks respectively associated with the actuators, and wherein each shift fork can be used to displace an associated shift sleeve of the shift transmission coaxially relative to a transmission shaft. Background Art

[0002] In vehicles with an internal combustion engine, it is necessary to adapt the speed and / or torque of the drive motor to the current operating state of the motor vehicle in order to operate the vehicle. For this purpose, the crankshaft of the internal combustion engine is connected to a manually shiftable mechanical transmission via a switching and separating clutch designed as a friction clutch. During the gear shifting of the transmission, the clutch is required to interrupt the power flow in the drive train.

[0003] In order to improve comfort, automatic planetary transmissions are widely used in modern motor vehicles, in which a hydraulic torque converter is usually provided instead of a clutch. For reasons of better energy efficiency and more favorable manufacturing costs, more and more automatically shiftable transmissions are used, whose transmission ratios are automatically shifted by means of multiple actuators. Compared with conventional automatic transmissions, automated shift transmissions do not require a lossy hydraulic torque converter, but work with a mechanical friction clutch. Unlike conventional mechanical manual shift transmissions, the automated shift transmissions are not operated by the driver by means of a foot pedal, but are automatically operated by means of an additional clutch actuator to prepare for gear shifting. The gear shifting in the transmission is hereby performed by means of a shift fork that can be actuated by an associated actuator, and the shift fork moves a shift sleeve in the transmission coaxially on the associated transmission shaft. The respective shift sleeves here either connect the gearwheels of the gear stages, which are respectively associated and are configured as idler gears, to the associated transmission shaft in a rotationally fixed manner, or release the transmission shaft in a rotationally movable manner.

[0004] In order to actuate the shift fork, a transmission shift unit is used in such automated shifting transmissions, which is arranged in the form of a cover on the transmission housing. Such a transmission shift unit carries a plurality of actuators, by means of which the shift fork, which is mounted in an axially movable manner on or at the longitudinal guide, can be longitudinally displaced in order to implement a gear shift. Summary of the invention

[0005] The object of the present invention is to provide an automated shift transmission, the shift mechanism of which is constructed in a greatly simplified manner to reduce manufacturing costs and to be easier to assemble. In addition, it should be achieved that the tilting torque that occurs due to the operation of the shift sleeve is not transmitted to the actuator.

[0006] This object is achieved with the automated shift transmission according to the invention.

[0007] The invention therefore relates to an automated shift transmission for a motor vehicle, comprising a transmission housing with a removable cover on which a transmission shift unit is arranged, wherein the transmission shift unit has actuators for actuating shift forks respectively assigned to these actuators, and wherein by means of each shift fork, an associated shift sleeve of the shift transmission can be displaced coaxially relative to the transmission.

[0008] In order to solve the problem posed, the transmission is provided that a longitudinal guide extending parallel to the longitudinal axis of the shifting transmission is fastened in the transmission housing, on which at least two shift forks are longitudinally displaceably received. Each shift fork has a coupling arm arranged eccentrically with respect to the longitudinal guide, each actuator has an axially displaceable actuating lever with a coupling geometry, and each coupling arm, in the assembled state of the cover and the transmission housing, cooperates with the respectively associated coupling geometry of the respectively associated actuator in such a way that a linear movement of the actuating lever of the actuator can be transmitted to the shift fork in order to displace the shift fork on the longitudinal guide.

[0009] Due to the releasable engagement of the coupling arm of the shift fork and the coupling geometry of the actuator, the automated shift transmission, in particular the cover and the transmission shift unit integrated in the cover, can be mounted and removed particularly quickly on the transmission housing. The transmission of possible tilting moments caused by the shift fork into the actuator of the transmission shift unit is largely avoided. In addition, the longitudinal guide integrated into the transmission housing achieves good support of the acting moments.

[0010] According to a technically advantageous embodiment, the actuating lever of the actuator has a cylindrical geometry, wherein each shift fork has a hollow cylindrical guide sleeve with a retaining arm, and a bow-shaped actuating section is formed at the end of each retaining arm pointing away from the guide sleeve for engagement in the respectively associated shift sleeve. This allows a space-saving actuation of the shift sleeve between the gearwheels of the shifting transmission while simultaneously making it easy to assemble the shift fork.

[0011] Another improvement of the invention provides that each of the shift forks is accommodated on the longitudinal guide with its guide sleeve parallel to the longitudinal axis of the shift transmission without play. Thus, a mechanically stable guidance of the shift fork on the longitudinal guide is provided. If necessary, the shift fork can be arranged on the longitudinal guide in a rotationally fixed manner. Thus, the guide sleeve and the longitudinal guide can each have a non-circular or polygonal cross-sectional geometry, for example. There is at least a large axial spacing between the guide sleeves, so that the guide sleeves of the shift fork can be axially displaced independently of each other to such an extent that the gear stages of the transmission can be safely and individually switched by axially displacing the shift sleeve.

[0012] In a shift transmission having a transmission shift unit with at least three actuators, three shift forks and three shift sleeves, it is preferably provided that on a first shift fork, a first coupling arm is formed on an associated retaining arm in the vicinity of a guide sleeve. As a result, the actuators of the transmission shift unit can be arranged spaced apart from one another parallel to their longitudinal axis. Furthermore, the guide sleeve of the first shift fork can be axially displaced on the longitudinal guide substantially without tilting moments.

[0013] In this shift transmission, the transmission shift unit can also have more than three actuators, for example a fourth actuator, with which a downstream range transmission designed as a planetary transmission can be shifted with respect to its two transmission steps.

[0014] In the above-mentioned shift transmission with at least three shift forks, it is also preferably provided that, on the second shift fork, the second coupling arm is formed at the free end of the arcuate actuating section. As a result, the arcuate actuating section of the second shift fork can be actuated particularly directly, i.e. with as little torque as possible, by the associated actuator of the transmission shift unit. Furthermore, on the third shift fork, the third coupling arm there is formed approximately centrally in the region of the arcuate actuating section between its free end and the retaining arm. This results in an actuating torque and an actuating force to be applied by the third actuator, the values ​​of which are approximately between those of the first and second shift forks.

[0015] Furthermore, it can be advantageously provided that the free ends of the coupling arms each have a coupling section which is oriented perpendicularly to the longitudinal axis of the shifting transmission and which points in the direction of the actuating lever of the associated actuator. The coupling sections can be rectangular or square or hemispherical at their free ends. Overall, this makes it possible to easily disassemble the interface between the shift fork and the actuator and to re-establish it during assembly of the cover and the transmission housing. Furthermore, the coupling sections are each a continuation of the coupling arms, which simplifies production.

[0016] Preferably, each coupling arm has at least one angled section. This achieves increased flexibility in the spatial arrangement of the actuator on the inner side of the cover of the transmission housing.

[0017] According to another advantageous development, the actuating rods of the actuators are arranged on the inner side of the cover of the transmission housing in an orientation parallel to the longitudinal axis of the gearshift transmission, and the respective free ends of the actuating rods of directly adjacent actuators point in axially opposite directions. This makes it possible to arrange linear actuators, such as compressed air actuators or hydraulic actuators, which have proven themselves in a very space-saving manner side by side.

[0018] It is also preferably provided that each actuating lever of the actuator has a coupling geometry which is formed by a coupling groove extending transversely to the longitudinal axis of the shifting transmission, wherein in the assembled state of the transmission housing and the cover, a coupling section of a coupling arm of the shift fork is respectively accommodated in each coupling groove parallel to the longitudinal axis without play. This achieves a stable, easy-to-produce, quickly installable and separable mechanical interface between the transmission-side shift fork and the actuator of the transmission shift unit which is as free of play as possible.

[0019] Finally, it can be provided that at least one connection for a pressure medium line is integrated in the cover of the transmission housing, via which the fluid pressure medium can be conducted to the actuator of the transmission shift unit. In particular, it can also be provided that a first connection is integrated into the cover of the transmission housing, via which the fluid pressure medium can be conducted to the aforementioned gear shift actuator or the aforementioned range shift actuator, a second connection is integrated into the cover, via which the fluid pressure medium can be conducted to the transmission shaft brake, and a third connection is integrated into the cover, via which the fluid pressure medium can be conducted to the vehicle's shifting clutch. By arranging the pressure medium connection in the transmission housing or in its cover, it is possible to avoid, in a cost-effective manner, producing such a connection on the main part of the transmission housing.

[0020] Furthermore, in one embodiment, a transmission system can be provided. The transmission system comprises the above-mentioned automated shift transmission, wherein the transmission system additionally has a transmission shaft brake and a shift clutch. A first interface is integrated into the cover of the transmission housing, through which a fluid pressure medium can be guided to the switching actuator. A second interface is integrated into the cover, through which a fluid pressure medium can be guided to the transmission shaft brake. Finally, a third interface is integrated into the cover, through which a fluid pressure medium can be guided to the shift clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The specification is accompanied by drawings to further explain the present invention. Among them:

[0022] Figure 1 A perspective top view of a cover of an automated shift transmission with a transmission shift unit according to the invention, facing the inside of a transmission housing interior; and

[0023] Figure 2 A perspective view of a longitudinal guide with a first, second and third shift fork fastened to a transmission housing is shown. DETAILED DESCRIPTION

[0024] therefore, Figure 1 The figure shows a perspective top view of the inner side 14 of the cover 10 of an automated shifting transmission 114 according to the invention with a transmission shifting unit 26 arranged on the cover side. Figure 2 The cover 10 of the transmission housing 112 shown in the figure has an outer side 12 opposite its inner side 14 and a substantially peripheral fastening flange 16. A flat seal (not shown) can be placed on the fastening flange 16. The fastening flange 16 has a plurality of holes 20 (not shown) through which removable fastening elements (e.g. screws, bolts, etc.) for mechanically connecting the cover 10 to the transmission housing 112 of the automated shift transmission 114 can be guided.

[0025] The transmission switching unit 26 mentioned above is arranged on the inner side 14 of the cover 10, which has three actuators 30, 32, 34, which are of interest here and are designed as linear actuators. The fourth actuator 36 is used to switch two transmission stages of a range transmission (not shown). This fourth actuator 36 is not relevant to the explanation of the present invention and is therefore not described in detail below.

[0026] The three first mentioned actuators 30, 32, 34 are arranged side by side in such a manner that the free ends of their operating links are alternately pointed to opposite axial directions. With these actuators 30, 32, 34, three shift forks 120, 122, 124 of the automated shift transmission 114 can be operated, and the shift forks are embedded in the receiving grooves of the respectively assigned shift sleeves of the transmission. The shift sleeves are respectively arranged on the transmission shaft not shown in a rotationally-resistant and axially movable manner adjacent to the gears of the transmission that are configured as idler gears. Through the axial movement of the shift sleeves on the transmission shaft, they are contacted with one of the two respectively adjacent idler gears in such a manner that the respective gears are connected to the transmission shaft in a rotationally-resistant manner. Thus, the torque can be transmitted from the transmission shaft to the gear or from the gear to the transmission shaft by means of the gear. This itself is known to the technicians in the field of transmission, and therefore does not need to be shown separately.

[0027] The first three actuators 30, 32, 34 can be operated fluidically, for example with compressed air or with a liquid, such as hydraulic oil. Each of the three actuators 30, 32, 34 that are critical here has a solid cylindrical actuating rod 40, 42, 44, which is oriented parallel to the longitudinal axis 50 of the automated shifting transmission 114. The first actuator 30 has a first actuating rod 40, the second actuator 32 has a second actuating rod 42, and the third actuator 34 has a third actuating rod 44. Each of the three actuating rods 40, 42, 44 has a coupling geometry 62, 64, 66. In addition, the three actuating rods 40, 42, 44 are each accommodated on the inner side 14 of the cover 10 in an axially displaceable manner at the associated bearing points 52, 54, 56. The three actuators 30, 32, 34 each have a substantially cylindrical housing 70, 72, 74. The base of the coupling geometries 62 , 64 , 66 of the actuators 30 , 32 , 34 is oriented substantially parallel to the longitudinal axis 50 of the automated shift transmission 114 .

[0028] The coupling geometry 64 of the second actuator 32 and the coupling geometry 66 of the third actuator 34 are each formed at the end of the associated actuating rod 42, 44. Accordingly, the coupling geometry 62 of the actuating rod 40 of the first actuator 30 is formed between the bearing point 52 and the housing 70 of the first actuator 30.

[0029] The coupling geometries 62, 64, 66 of the three actuating levers 40, 42, 44 are here each designed as a simple coupling groove 82, 84, 86, which extend transversely or perpendicularly to the longitudinal axis 50. Each of the three coupling grooves 82, 84, 86 has an approximately rectangular cross-sectional geometry, which can be produced relatively easily in terms of production technology.

[0030] The cover 10 also has a first connection 92, a second connection 94, a third connection 96 and a fourth connection 98 for a fluid (not shown), such as compressed air or a liquid suitable for operating the actuators 30, 32, 34. The first connection 92 is used to supply pressure medium to the four actuators 30, 32, 34, 36, while the other two connections 94, 96 are provided for supplying pressure medium to a transmission shaft brake or a shifting clutch of the vehicle, neither of which is shown.

[0031] As already briefly mentioned, Figure 2The figure shows a perspective view of a longitudinal guide 110 with three shift forks 120, 122, 124 on the transmission housing side of an automated shift transmission 114. The longitudinal guide 110 is formed by a rod which is fastened to the transmission housing (not shown) parallel to the longitudinal axis 50 of the transmission housing 112. In the exemplary embodiment shown here, the longitudinal guide 110 is cylindrical in cross section, but it can also be polygonal in order to prevent torsion.

[0032] The three shift forks 120, 122, 124 each have a guide sleeve 126, 128, 130, which is received on the longitudinal guide 110 in a sliding manner and as close to play as possible. For this purpose, the three guide sleeves 126, 128, 130 of the shift forks 120, 122, 124 each have a geometry that is approximately a hollow cylinder. In the case of a different geometry of the longitudinal guide 110 than a cylindrical shape, the guide sleeves 126, 128, 130 have a cross-sectional geometry that corresponds geometrically thereto. As mentioned, the shift sleeves (not shown) of the automated shift transmission 114 can be respectively actuated by means of the shift forks 120, 122, 124, whereby the idler gear (also not shown) of the shift transmission 114 can be coupled to the associated transmission shaft in a rotationally fixed manner or can be released from the transmission shaft again.

[0033] Each of the three shift forks 120, 122, 124 also has a coupling arm 132, 134, 136 with a coupling section 138, 140, 142, which is arranged eccentrically with respect to the longitudinal guide 110, wherein the coupling section is preferably formed integrally at a free end 144, 146, 148 of one of the three coupling arms 132, 134, 136. The free ends 144, 146, 148 of the three coupling arms 132, 134, 136 are oriented substantially perpendicularly to the longitudinal axis 50 of the shifting transmission. The first coupling arm 132 is formed integrally on the first shift fork 120, the second coupling arm 134 is formed integrally on the second shift fork 122, and the third coupling arm 136 is formed integrally on the third shift fork 124 accordingly. In the assembled state of cover 10 and transmission housing 112, coupling arms 132, 134, 136 are each oriented in the direction of transmission shift unit 26 mounted on cover 10. For example, the three coupling sections 138, 140, 142 each have an approximately cubic or cuboid shape.

[0034] In the assembled state of the cover 10 and the transmission housing 112, the coupling sections 138, 140, 142 respectively engage in the associated coupling grooves 82, 84, 86 of the actuating rods 40, 42, 44 of the actuators 30, 32, 34 as close to play as possible, so that the shift forks 120, 122, 124 can be actuated axially and individually precisely to respectively initiate a gear shift of the automated shift transmission 114. Since the coupling grooves 82, 84, 86 of the three actuators 30, 32, 34 are oriented transversely to the longitudinal axis 50, during a shifting operation initiated by the actuators 30, 32, 34, no significant torque or tilting torque is introduced from the shift forks 120, 122, 124 into the actuators 30, 32, 34 of the transmission shift unit 26. Each coupling arm 132 , 134 , 134 also has, by way of example, an angled section 150 , 152 , 154 , which facilitates a geometrically accurate engagement of the coupling section 138 , 140 , 142 in the respectively associated coupling groove 82 , 84 , 86 .

[0035] Geometries other than rectangular or square coupling sections 138 , 140 , 142 are also possible, provided that the coupling geometries 62 , 64 , 66 of the actuating rods 40 , 42 , 44 of the actuators 30 , 32 interacting with the coupling sections 138 , 140 , 142 , 34 are designed to correspond geometrically to these coupling geometries at least in certain areas.

[0036] On each guide sleeve 126, 128, 130 of the three shift forks 120, 122, 124, a retaining arm 156, 158, 160 pointing approximately radially outward is integrally formed, and at their ends 162, 164, 166 pointing radially outward relative to the longitudinal guide 110, a bow-shaped actuating section 168, 170, 172 is preferably integrally formed for embedding in a groove of a shift sleeve (not shown) of the automated shift transmission 114.

[0037] The first coupling arm 132 is hereby exemplarily formed in the region of the retaining arm 156 of the first shift fork 120, remote from the free end 180 of the arcuate actuating section 168 of the first shift fork 120, in the immediate vicinity of its guide sleeve 126. The second coupling arm 134 is hereby formed, merely exemplarily, integrally on the second shift fork 122 in the region of the free end 182 of the arcuate actuating section 170 of the second shift fork 122. The third coupling arm 136 is located approximately centrally between its free end 184 and the retaining arm 160 of the third shift fork 124 in the region of the arcuate actuating section 172.

[0038] Due to the above-mentioned positioning of the coupling arms 132, 134, 136 on the respectively associated shift forks 120, 122, 124, the actuators 30, 32, 34 can be positioned offset and parallel to each other within the cover-side transmission shift unit 26. The axial lengths L1, L2, L3 of the three coupling arms 132, 134, 136 are respectively dimensioned here so that their coupling sections 138, 140, 142 engage in the associated coupling geometries 62, 64, 66 of the actuating rods 40, 42, 44 of the actuators 30, 32, 34. The different spatial arrangements, lengths L1, L2, L3 and shapes of the coupling arms 132, 134, 136 on the shift forks 120, 122, 124 depend on the requirements regarding the spatial positioning of the three actuators 30, 32, 34 of the transmission shift unit 26 on the inner side 14 of the cover 10 of the transmission housing 112.

[0039] Since the coupling arms 132, 134, 136 of the shift forks 120, 122, 124 and the coupling geometries 62, 64, 66 of the actuators 30, 32, 34 are interlocked in the manner of a mechanical interface, they can be quickly separated from one another if necessary, so that the actuating device of the automated shift transmission 114 can be assembled and disassembled particularly easily and easily. In addition, forces and / or tilting moments originating from the shift forks 120, 122, 124 and introduced into the transmission shift unit 26 are largely avoided.

[0040] Reference numerals list

[0041] 10 Transmission housing cover

[0042] 12 Outside of cover

[0043] 14 Inside of cover

[0044] 16 Cover fastening flange

[0045] 20 Hole in cover

[0046] 26 Transmission switching unit

[0047] 30 First actuator

[0048] 32 Second actuator

[0049] 34 Third actuator

[0050] 36 Fourth actuator

[0051] 40 A lever of the first actuator 30

[0052] 42 Actuator lever of the second actuator 32

[0053] 44 Operating rod of the third actuator 34

[0054] 50 Longitudinal axis of the gearshift transmission

[0055] 52 Support position for the operating lever 40

[0056] 54 Supporting position for the operating lever 42

[0057] 56 Support position for the operating lever 44

[0058] 62 Coupling geometry of the joystick 40

[0059] 64 Coupling geometry of the joystick 42

[0060] 66 Coupling geometry of the joystick 44

[0061] 70 Housing of the first actuator

[0062] 72 Housing of the second actuator

[0063] 74 Housing of the third actuator

[0064] 82 Coupling groove in the operating lever 40

[0065] 84 Coupling groove in the operating lever 42

[0066] 86 Coupling groove in the operating lever 44

[0067] 92 First interface for fluids

[0068] 94 Second connection for fluid

[0069] 96 Third port for fluid

[0070] 98 Fourth port for fluids

[0071] 110 longitudinal guide

[0072] 112 Transmission housing

[0073] 114Automated gear shift transmission

[0074] 120 First Switch Fork

[0075] 122 Second switching fork

[0076] 124 Third switching fork

[0077] 126 Guide sleeve of shift fork 120

[0078] 128 Guide sleeve of shift fork 122

[0079] 130 Guide sleeve of shift fork 124

[0080] 132 Coupling arm on the shift fork 120

[0081] 134 Coupling arm on the shift fork 122

[0082] 136 Coupling arm on the shift fork 124

[0083] 138 coupling section of the coupling arm 132

[0084] 140 coupling section of the coupling arm 134

[0085] 142 Coupling section of coupling arm 136

[0086] 144 is a free end portion of the coupling arm 132

[0087] 146 The free end of the coupling arm 134

[0088] 148 Free end of coupling arm 136

[0089] 150 The bent section of the coupling arm 132

[0090] 152 The bent section of the coupling arm 134

[0091] 154 The bent section of the coupling arm 136

[0092] 156 Retaining arm of the shift fork 120

[0093] 158 retaining arm of the shift fork 122

[0094] 160 retaining arm of the shift fork 124

[0095] 162 The end of the holding arm 156

[0096] 164 The end of the holding arm 158

[0097] 166 The end of the holding arm 160

[0098] 168 Arched actuating section of the shift fork 120

[0099] 170 Arched actuating section of the shift fork 122

[0100] 172 Arched actuating section of the shift fork 124

[0101] 180 Free end of the arc-shaped actuating section 168

[0102] 182 Free end of the arc-shaped operating section 170

[0103] 184 Free end of the arc-shaped operating section 172

[0104] L1 Length of coupling arm 132

[0105] L2 Length of coupling arm 134

[0106] L3 Length of coupling arm 136

Claims

1. An automated shift transmission (114) for a motor vehicle, the shift transmission having a transmission shift unit (26) and a transmission housing (112), the transmission housing having a removable cover (10), the transmission shift unit (26) being arranged on the removable cover (10), wherein: The transmission shift unit (26) has an actuator (30, 32, 34) for actuating a shift fork (120, 122, 124) respectively assigned to the actuator, and wherein each shift fork (120, 122, 124) can be used to coaxially move an assigned shift sleeve of the shift transmission (114) relative to a transmission shaft, characterized in that a longitudinal guide (110) extending parallel to a longitudinal axis (50) of the shift transmission (114) is fastened in the transmission housing (112), three shift forks (120, 122, 124) are longitudinally movably accommodated on the longitudinal guide (110), and each shift fork (120, 122, 124) has a longitudinal guide (50) extending parallel to a longitudinal axis (50) of the shift transmission (114) and a longitudinal guide (50) extending parallel to a longitudinal axis (50) of the shift transmission (114) is fastened in the transmission housing (112), three shift forks (120, 122, 124) are longitudinally movably accommodated on the longitudinal guide (110), and each shift fork (120, 122, 124) has a longitudinal guide (50) extending parallel to a longitudinal axis (50) of the shift transmission (114) and a longitudinal guide (50) extending parallel to a longitudinal axis (50) of the shift transmission (114) is fastened to the transmission housing (112), 110), each actuator (30, 32, 34) having an axially displaceable actuating rod (40, 42, 44) with a coupling geometry (62, 64, 66), and each coupling arm (132, 134, 136) cooperates with the respectively associated coupling geometry (62, 64, 66) of the respectively associated actuator (30, 32, 34) in the assembled state of the cover (10) and the transmission housing (112) in such a way that a linear movement of the actuating rod (40, 42, 44) of the actuator (30, 32, 34) can be transmitted to the shift fork (120, 122, 124) for moving the shift fork on the longitudinal guide (110), wherein the three shift forks are each configured as a first shift fork, a second shift fork and a third shift fork, wherein the first shift fork has a first coupling arm arranged eccentrically with respect to the longitudinal guide, the second shift fork has a second coupling arm arranged eccentrically with respect to the longitudinal guide, and the third shift fork has a third coupling arm arranged eccentrically with respect to the longitudinal guide, The transmission switching unit (26) is equipped with three actuators (30, 32, 34) for respectively actuating three shift forks (120, 122, 124), and the automated shift transmission (114) has three shift sleeves. The three actuators are respectively configured as a first actuator, a second actuator and a third actuator, wherein the first actuator is used to actuate a first shift fork, the second actuator is used to actuate a second shift fork, and the third actuator is used to actuate a third shift fork, the actuating rods (40, 42, 44) of the three actuators (30, 32, 34) all have a cylindrical geometry, each of the shift forks (120, 122, 124) has a hollow cylindrical guide sleeve (126, 128, 130) with a retaining arm (156, 158, 160), and an arcuate actuating section (168, 170, 172) is configured at an end (162, 164, 166) of each retaining arm (156, 158, 160) facing away from the guide sleeve (126, 128, 130) for engaging in a respectively assigned shift sleeve, On the first shift fork, a first coupling arm (132) is formed on an associated retaining arm (156) in the vicinity of the guide sleeve (126). On the second shift fork, a second coupling arm (134) is formed at a free end (182) of the arc-shaped actuating section of the second shift fork, and The third coupling arm (136) is designed centrally in the region of the arcuate actuating section of the third shift fork, between a free end (184) of the arcuate actuating section and a retaining arm (160) of the third shift fork.

2. The gearshift transmission device according to claim 1, characterized in that: Each of the shift forks (120, 122, 124) is slidably received on the longitudinal guide (110) by means of its guide sleeve (126, 128, 130) parallel to the longitudinal axis (50) of the shift transmission (114) without play.

3. The gearshift transmission according to any one of the preceding claims, characterized in that The longitudinal guide (110) and each guide sleeve (126, 128, 130) have a non-circular or polygonal cross-sectional geometry.

4. The gear shift transmission device according to claim 1, characterized in that: The free end (144, 146, 148) of each coupling arm (132, 134, 136) has a coupling section (138, 140, 142) which is oriented perpendicularly to the longitudinal axis (50) of the shifting transmission and points in the direction of an actuating rod (40, 42, 44) of an associated actuator (30, 32, 34).

5. The gear shift transmission device according to claim 1 or 4, characterized in that: Each coupling arm (132, 134, 136) has at least one bent section (150, 152, 154).

6. The gear shift transmission device according to claim 1 or 2, characterized in that: The operating rods (40, 42, 44) of the three actuators (30, 32, 34) are all oriented parallel to the longitudinal axis (50) of the shift transmission (114) on the inner side (12) of the cover (10) of the transmission housing (112), and the respective free ends of the operating rods (40, 42, 44) of directly adjacent actuators (30, 32, 34) point in opposite directions in the axial direction.

7. The gearshift transmission device according to claim 6, characterized in that: Each operating lever (40, 42, 44) of each actuator (30, 32, 34) has a coupling geometry (62, 64, 66), which is formed by a coupling groove (82, 84, 86) extending transversely to the longitudinal axis (50) of the shift transmission (114), wherein, in the assembled state of the transmission housing (112) and the cover (10), a coupling section (138, 140, 142) of a coupling arm (132, 134, 136) of an associated shift fork (120, 122, 124) is respectively accommodated in each coupling groove (82, 84, 86) parallel to the longitudinal axis (50) without play.

8. The gear shift transmission device according to claim 1 or 2, characterized in that: At least one connection (92, 94, 96) for a pressure medium line is integrated into the cover (10) of the transmission housing (112), through which the fluid pressure medium can be conducted to the actuator (30, 32, 34).

9. The gearshift transmission device according to claim 8, characterized in that: A first interface (92) is integrated into the cover (10) of the transmission housing (112), through which a fluid pressure medium can be guided to an actuator (30, 32, 34), a second interface (94) is integrated into the cover (10), through which a fluid pressure medium can be guided to a transmission shaft brake, and a third interface (96) is integrated into the cover (10), through which a fluid pressure medium can be guided to a shifting clutch.

10. A transmission system comprising the automated shift transmission device according to claim 8, characterized in that: The transmission system additionally has a transmission shaft brake and a shifting clutch, wherein a first interface (92) is integrated in a cover (10) of a transmission housing (112), through which a fluid pressure medium can be guided to an actuator (30, 32, 34), a second interface (94) is integrated in the cover (10), through which a fluid pressure medium can be guided to the transmission shaft brake, and a third interface (96) is integrated in the cover (10), through which a fluid pressure medium can be guided to the shifting clutch.

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