DE102015215733A1 - Actuator for adjusting an actuator - Google Patents

Abstract

The present invention relates to an actuator (6) for adjusting an actuator (5), in particular a motor vehicle (1), wherein the actuator (6) has a servomotor (16) with a drive shaft (17) and a radially from the drive shaft (17). Having spaced, axially parallel to the drive shaft (17) extending output shaft (25). A stable and / or compact design of the actuator (6) results from the fact that the actuator (6) at least one drive intermediate drive (19) which is arranged axially parallel to the drive shaft (17) and rotatably mounted relative to the drive shaft (17) , wherein the bearing of the drive intermediate drive (19) by means of a pin (20) which is axially parallel to the drive shaft (17) and in a bearing opening (24) of a cover (21), a rotationally fixed to the drive shaft (17) attached Input gear (18) at least partially surrounds, is radially mounted. The invention further relates to a motor vehicle (1) with an actuator (5) and such a the actuator (5) adjusting actuator (6).

Description

The present invention relates to a controller for adjusting an actuator, in particular a motor vehicle. The invention further relates to a motor vehicle with such a controller.

Generic controllers serve the purpose of adjusting an actuator. For this purpose, such controllers usually have a servo motor which drives a drive shaft. This drive is transferable via a transmission to an output shaft, which is connected to such an actuator and thus adjusts the actuator. Such transmissions are usually equipped with intermeshing gears for transmitting the drive, which in particular allow a translation of the drive.

Such a controller is for example from the DE 299 01 516 U1 known. This actuator is used to adjust a throttle valve of a motor vehicle as an actuator and has a servo motor with a drive shaft, the drive is transmitted via a three-stage gearbox to an output shaft. For this purpose, a transmission shaft is arranged between the drive shaft and the output shaft, wherein the respective shaft is provided with at least one gear which engages in a gear of the radially adjacent shaft.

From the EP 1 662 120 B1 Another such actuator for adjusting a throttle valve is known as an actuator of a motor vehicle having a servomotor with a drive shaft and two transmission shafts, wherein the transmission shafts and the drive shaft are each radially spaced and have intermeshing gears that form a multi-stage transmission. An output shaft of the actuator is coaxial with one of the transmission shafts and rotatably supported relative to this transmission shaft.

In the case of actuators from the prior art, therefore, an increasing number of axially parallel and radially spaced shafts is necessary for realizing a multi-stage transmission. It is true, the more steps, the more such waves are needed.

In a large number of applications in which such actuators are used, in particular in a motor vehicle, attention must be paid to a stable and / or compact design of such actuators.

The present invention therefore deals with the problem of improving for a controller of the type mentioned and for a motor vehicle with such a controller or at least specify other embodiments, which are characterized in particular by a reduced space requirement and / or increased stability.

This problem is solved according to the invention by the subject matters of the independent claims. Advantageous embodiments are the subject of the dependent claims.

The present invention is based on the general idea, in a positioner for adjusting an actuator arranged axially parallel to a drive shaft and rotatably mounted to the drive shaft intermediate drive, which serves to form a transmission of the actuator, to be supported by means of a pin rotatable relative to the drive shaft and the Store the pin radially in a cover surrounding the input gear. As a result, voltages, in particular bending stresses in the pin are prevented or at least reduced, so that there is a reduced load on the actuator. As a result, the stability and / or the lifetime of the actuator increase. In addition, this makes a compact design of the actuator possible.

According to the idea of the invention, the actuator thus has the servo motor with the drive shaft, wherein the input gear is non-rotatably mounted on the drive shaft. The output shaft is axially parallel and radially spaced to a drive shaft rotatably mounted, wherein an output gear is rotatably mounted on the output shaft. The at least one drive intermediate drive has a first drive gearwheel and a second drive gearwheel, wherein the drive gearwheels of the drive intermediate drive are arranged axially adjacent to one another and non-rotatably connected to one another. In this case, the respective drive intermediate drive is in engagement with an output intermediate drive. The respective drive intermediate drive is arranged coaxially to the drive shaft and rotatably mounted relative to the drive shaft, wherein at least one such drive intermediate drive is rotatably mounted on such a pin. The pin extends axially parallel to the drive shaft and is rotatably mounted relative to the drive shaft in a stator housing of the actuator. The cover is cup-shaped or bell-shaped and surrounds the input gear at least partially. The cover has an axially spaced from the input gear and radially extending, in particular extending in the circumferential direction, ceiling wall, in which said bearing opening is provided. The bearing opening is arranged coaxially to the pin, wherein the pin is radially mounted in the bearing opening. In this case, at least one such drive intermediate drive can be arranged on the side facing away from the input gear side of the ceiling wall. By such a radial bearing of the pin can also realize a simple and space-saving radial bearing of the pen.

In principle, the pin and the drive shaft can be radially spaced. This means that the pin and the drive shaft are basically radial can be arranged offset. Here, embodiments are preferred in which the radial distance of the pin to the drive shaft is smaller than the radial distance between the pin and the output shaft. It is furthermore preferred if the pin is arranged radially closer to the drive shaft than to the output shaft. In particular, the pin can be arranged offset radially on the side remote from the output shaft side of the drive shaft to the drive shaft. Thus, the operation of the transmission is improved and / or the space requirement of the actuator is reduced.

Preferably, the pin is coaxial with the drive shaft. Accordingly, the bearing opening is arranged coaxially with the drive shaft. As a result, in particular the space requirement of the actuator, in particular in the radial direction, can be reduced.

If the pin runs coaxially with the drive shaft, the at least one drive intermediate drive mounted on the pin is also arranged coaxially with the drive shaft.

In advantageous variants, at least two such drive intermediate drives, preferably all drive intermediate drives, are arranged coaxially with the drive shaft. As a result, in particular the space requirement of the actuator, in particular in the radial direction, can be further reduced.

According to preferred embodiments, the actuator housing has a first housing part and a second housing part which closes or covers the first housing part. In this case, the input gear is arranged in the first housing part. It is also conceivable to arrange the intermediate drives in the first housing part. Of course, the actuator housing may also have further housing parts.

The first housing part may be formed as a housing pot, while the second housing part is formed as a housing cover.

The pin can also be stored radially in addition to the bearing opening of the cover. It is particularly conceivable to embodiments in which the pin is additionally mounted radially in the second housing part. Due to the radial mounting of the pin in the bearing opening, there is also a reduction of stresses, in particular bending stresses in the second housing part.

It is also conceivable to rotatably support the output shaft in the housing cover.

The cover preferably has, in addition to the top wall, a side wall which extends axially and extends, in particular in the circumferential direction. In this case, the top wall and side wall of the cover can be made separately. It is preferred if the cover, that is to say in particular the top wall and the side wall, are formed in one piece, in particular of the same material.

It is also conceivable, the cover and the first housing part in one piece, i. in particular uniform material, form.

The cover can be made of plastic. Also, the first housing part may be made of plastic. In this case, the first housing part and cover can be produced in a common production method, for example by a casting method, in particular by injection molding.

It is also conceivable to manufacture the second housing part made of plastic, in particular by a casting method, for example by injection molding. In this case, the pin can be encapsulated by the second housing part, so that it is non-rotatably arranged in the second housing part.

In preferred embodiments, the input gear is engaged with such an output intermediate drive. As a result, the rotation of the input gear is transmitted to the output intermediate drive. It is preferred if the cover is designed to be open towards this output intermediate drive. Thereby, the engagement between the input gear and the output intermediate gear, with which the input gear is engaged, simplified and trouble-free. This means in particular that the cover is designed to be open radially in some areas.

In advantageous embodiments, the respective output intermediate drive has a first output gear and a second output gear, which are arranged axially adjacent and rotatably connected to each other. In this case, the respective output intermediate drive is arranged coaxially to the output shaft and rotatably supported relative to the output shaft. In addition, one of the drive gears of such a drive intermediate gear is engaged with the output gear while one of the output gears of such a driven intermediate gear is engaged with the input gear. The remaining drive gears are each engaged with such a driven gear. In this way, the drive of the drive shaft via the input gear to such a driven intermediate drive is transmitted, which transmits this drive to the associated drive intermediate drive, etc. to the output gear in engagement with the drive gear, the corresponding rotation to the output gear transmits, which rotates the output shaft. This rotation can be used to adjust such an actuator can be tapped on the output shaft.

It is preferred in this case if the actuator exclusively has intermediate drives and intermediate drive drives. It is further preferred if the number of drive intermediate drives corresponds to the number of output intermediate drives.

In this case, the respective intermediate drives can be formed in one piece, in particular of the same material. That is, the gears of at least one such intermediate drive are integrally formed, in particular of the same material.

Advantageous embodiments provide a coaxial arrangement of the servomotor to the drive shaft. As a result, the actuator can in particular be designed to save space.

The actuator can be used to adjust any actuator. Preferably, the actuator is used in a motor vehicle. Here, the actuator is preferably used for adjusting an actuator for dosing or regulating a fluid flow.

It is conceivable, for example, that the associated motor vehicle has an exhaust gas turbocharger, wherein the actuator is used for adjusting at least one actuator of the exhaust gas turbocharger. It is to be thought of embodiments in which the exhaust gas turbocharger has a variable turbine geometry, wherein the variable turbine geometry is adjusted by the actuator. Also to be considered is the exhaust gas turbocharger, which have a wastegate valve, wherein the actuator adjusts the wastegate valve.

In further embodiments, the motor vehicle has a fresh air system for supplying fresh air to an internal combustion engine of the motor vehicle. The fresh air system is provided with a flap which serves to meter the fresh air supply to the internal combustion engine. By means of the actuator can in this case such a flap, in particular throttle, are operated. In particular, it is conceivable to adjust by means of the actuator such a flap of a suction pipe of the fresh air system.

The motor vehicle may alternatively or additionally comprise an exhaust gas recirculation device for recirculating exhaust gas to the internal combustion engine. The exhaust gas recirculation device is provided with such an actuator which serves to meter the exhaust gas recirculation to the internal combustion engine. In this case, such a controller is used to adjust the actuator. Such an actuator may in particular be designed as a valve, for example as a return valve.

Of course, it is also possible to adjust by means of such a controller two or more such actuators. It is also conceivable to equip the motor vehicle with two or more such actuators, wherein the respective actuator adjusts at least one such actuator.

Other important features and advantages of the invention will become apparent from the dependent claims, from the drawings and from the associated figure description with reference to the drawings.

It is understood that the features mentioned above and those yet to be explained below can be used not only in the particular combination given, but also in other combinations or in isolation, without departing from the scope of the present invention.

Preferred embodiments of the invention are illustrated in the drawings and will be described in more detail in the following description, wherein like reference numerals refer to the same or similar or functionally identical components.

It show, each schematically

1 a greatly simplified schematic diagram of a motor vehicle,

2 a section through a controller of the motor vehicle,

3 a section of a spatial interior view of the author,

4 a spatial interior view of the author.

In 1 is a motor vehicle 1 with an internal combustion engine 2 shown, the drive of the motor vehicle 1 can serve. In operation of the internal combustion engine 2 Fresh air is needed, that of the internal combustion engine 2 via a fresh air system 3 is supplied. For dosing the internal combustion engine 2 fresh air supplied is inside the fresh air system 3 one as a throttle 4 trained actuator 5 arranged. The throttle 4 is doing this with the help of a steller 6 adjusted. In operation of the internal combustion engine 2 Exhaust gas is generated via an exhaust system 7 is dissipated. By means of an exhaust gas recirculation device 8th is it possible to exhaust the internal combustion engine 2 feed again. For this purpose, the exhaust gas recirculation device branches 8th from the exhaust system 7 and flows into the fresh air system 3 , In the exhaust gas recirculation device 8th is a return valve 9 as an actuator 5 provided, the dosing of the exhaust gas recirculation to the internal combustion engine 2 serves. The return valve 9 as an actuator 5 is with the help of such a writer 6 adjusted. To increase efficiency, the motor vehicle 1 an exhaust gas turbocharger 10 with a turbine wheel 11 and a compressor wheel 12 on. Here is the turbine wheel 11 in the exhaust system 7 involved and drives that in the fresh air system 3 integrated compressor wheel 12 to the engine 2 to compress supplied fresh air. For variation of the impingement of the turbine wheel 11 with exhaust gas, the exhaust gas turbocharger 10 a variable turbine geometry 13 and a wastegate valve device 14 on. With the help of the variable turbine geometry 13 can a flow-through cross section to the turbine wheel 11 be set. Adjusting the variable turbine geometry 13 and thus the adjustment of the flow-through cross-section is carried out by means of such a controller 6 , That is, the variable turbine geometry 13 as an actuator 5 with the help of the writer 6 is adjusted. The wastegate valve device 14 branches upstream of the turbine wheel 11 from the exhaust system 7 and leads downstream of the compressor wheel 11 back in the exhaust system 7 one. This makes it possible, the exhaust gas on the compressor 11 to pass, wherein for dosing of the compressor wheel 11 Passed exhaust gas a wastegate valve 15 as an actuator 5 is provided. The wastegate valve 15 as an actuator 5 This is done with the help of such a writer 6 adjusted.

The adjuster 6 is in the 2 to 4 shown, where 2 a section through the actuator 6 shows while in 3 and in 4 different spatial interior views of the author 6 to be seen, being in the 3 and 4 not alone 2 visible components are shown. The adjuster 6 has a servomotor 16 with a driven drive shaft 17 on. The drive shaft 17 is with an input gear 18 connected, the rotationally fixed to the drive shaft 17 is appropriate. This is the result of the rotation of the drive shaft 17 to a corresponding rotation of the input gear 18 , A drive intermediate drive 19 is axially parallel to the drive shaft 17 arranged and relative to the drive shaft 17 rotatably mounted. This is a pen 20 provided, the rotation in the actuator 6 is held so that the drive shaft 17 relative to the pen 20 is rotatable. The pencil 20 is axially parallel to the drive shaft 17 arranged and axially from the drive shaft 17 spaced. Here is the drive intermediate drive 19 rotatable on the pin 20 stored. In the illustrated embodiment, the drive intermediate drive 19 and the pen 20 coaxial to the drive shaft 17 arranged. As a result, in particular a more compact design of the actuator 6 possible.

Like from the 2 and 3 is apparent, is the input gear 18 partially from a cover 21 surrounded, which is bell-shaped or cup-shaped. The cover has a circumferentially extending side wall 22 and an adjoining ceiling wall 23 on, with the ceiling wall 23 extends radially and in the circumferential direction. In the ceiling wall 23 is a storage opening 24 provided axially from the drive shaft 17 and the drive gear 18 spaced is coaxial with the pin 20 is arranged. In the example shown, the bearing opening 24 So coaxial with the drive shaft 17 arranged. This is the pen 20 in the warehouse opening 24 radially, for example by means of a radial bearing, not shown, stored. In 3 is a lateral plan view of the cover 21 to see at the pin 20 not shown for a better understanding. In particular from 3 it shows that the cover 21 the drive gear 18 only partially surrounds, such that the cover 21 is laterally open, so that the drive gear 18 on the open side of the cover 21 protrudes radially.

The adjuster 6 also has an output shaft 25 on, the axis parallel to the drive shaft 17 and radially spaced from the drive shaft 17 is arranged. The output shaft 25 is in the actuator 6 rotatably mounted, with an output gear 26 rotationally fixed to the output shaft 25 is appropriate. The output shaft 25 is by means of the output gear 26 turned to such an actuator 5 to adjust. This is the drive of the servomotor 16 over the output gear 26 on the output shaft 25 transfer. For this purpose, the controller 6 an output intermediate drive 27 on, coaxial with the output shaft 25 arranged and relative to the output shaft 25 is rotatably mounted.

The drive intermediate drive 19 has a first drive gear 28 and a second drive gear 29 on. The drive gears 28 . 29 are axially adjacent and rotatably connected to each other, wherein the drive intermediate drive 19 in the example shown is integrally formed or of the same material. In this case, the drive gears 28 . 29 different outer diameter.

The output intermediate drive 27 has a first output gear 30 and a second output gear 31 on. The output gears 30 . 31 are axially adjacent and rotatably connected to each other, wherein the output intermediate drive 31 in the example shown is integrally formed or of the same material. This has the first output gear 30 and the second output gear 31 different outer diameter.

The input gear 18 stands with the first output gear 30 the power take-off 27 engaged, such that the input gear 18 the first output gear 30 drives. As a result, the second output gear rotates 31 that with the axially adjacent first drive gear 28 engaged. The rotation of the relative to the output shaft 25 rotatably mounted Power take-intermediate drive 27 results in a corresponding rotation of the first drive gear 28 that with the second output gear 31 engaged. As a result, the second drive gear rotates 29 , The second drive gear 29 stands with the output gear 26 engaged so that the rotation of the relative to the drive shaft 17 rotatably mounted drive intermediate drive 19 to a corresponding rotation of the output gear 26 leads. This will cause the output shaft 25 at the output gear 26 is rotatably mounted, rotated accordingly, with this rotation for adjusting such actuator 5 is used. The input gear 18 and the output gear 26 realize together with the intermediate drives 19 . 27 So a gear 47 , which in the present case is formed in three stages, for which purpose only two radially spaced-apart waves 17 . 25 necessary. In the transmission 47 forms the input gear 18 the first link and the output gear 26 the last link of the gears 18 . 26 . 28 . 29 . 30 . 31 ,

It can be seen that the meshing gears 18 . 26 . 28 . 29 . 30 . 31 have different outer diameter and a different number of teeth. The input gear 18 thus has a smaller outer diameter and has a smaller number of teeth than the first output gear 30 so that the input gear 18 as an input pinion 32 acts. The second output gear 31 has a smaller outer diameter than that with the second output gear 31 engaged first drive gear 28 , Accordingly, it is the second output gear 31 an output pinion 33 , In addition, the second drive gear 29 in terms of outer diameter smaller than the output gear 26 so that the second drive gear 29 as drive pinion 34 acts. As in particular from 4 It can also be seen that the respective pinion 32 . 33 . 34 a smaller number of teeth than the associated gear 26 . 28 . 30 , Out 4 also shows that the output gear 26 as a gear segment 35 is formed, which extends in the circumferential direction by less than 180 °.

As in 2 can be seen, the controller points 6 a controller housing 36 on, that is a first housing part 37 For example, a housing pot 37 ' , and a the first housing part 37 closing or covering the second housing part 38 , For example, a housing cover 38 ' , includes. The servomotor 16 , the input gear 18 , the output gear 26 as well as the intermediate drives 19 . 27 are in the first housing part 37 arranged. The output shaft 25 is through the second housing part 38 guided and by means of a storage facility 39 that is a bearing element 39 ' like a ball bearing 39 '' may have, rotatably mounted. In the example shown, the bearing device 39 in the second housing part 38 recorded, with the output shaft 25 additionally via a sliding bearing device 45 in the first housing part 37 is slidably mounted. On the first housing part 37 axially facing away from the ball bearing 39 is also a ring seal 40 intended. The output shaft 25 is at the axial from the second housing part 38 opposite end with a magnet 41 provided, the rotationally fixed to the output shaft 25 is appropriate. The non-rotatably on the output shaft 25 attached magnet 41 acts with a magnetic sensor 42 together, for example, a speed and / or rotational speed of the output shaft 25 to determine. The magnetic sensor 42 is via a connection pin 43 in a socket 44 is arranged, connectable to a controller, not shown, to which of the sensor device 42 transmitted data are transmitted.

From the 2 and 3 also shows that the cover 21 in one piece, ie in particular of the same material, is formed. Here is the open side of the cover 21 the radially adjacent first output gear 30 facing so that the input gear 18 and the first output gear 30 mesh seamlessly. It can also be seen that the cover 21 and the first housing part 37 are also integrally formed or of the same material. The actuator housing 36 can be made of plastic, in which case it is particularly conceivable, the first housing part 37 and / or the second housing part 38 produce as injection molded parts.

Out 2 it also shows that the pen 20 rotatably in the second housing part 38 is arranged. For this, the pen 20 in the second housing part 38 be injected, glued or pressed. It is conceivable, the pen 20 in addition to the radial bearing in the bearing opening 24 the cover 21 in the first housing part 37 store radially.

The intermediate drives 19 . 27 make up together with input gear 18 and output gear 26 So a three-stage gearbox 47 , It is of course possible by the addition of additional drive intermediate drives 19 and power take-offs 27 transmission 47 to realize with higher levels, in which case the number of drive intermediate drives 19 preferably the number of output intermediate drives 27 equivalent. An increase in the level of the transmission 47 this does not lead to an expansion of the actuator 6 in the radial direction. This means that the space requirement of the actuator 6 , in particular in the radial direction, is kept small. In addition, additional waves account for storing additional intermediate drives 19 . 27 so that too the weight of the writer 6 is reduced.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 29901516 U1 [0003]
• EP 1662120 B1 [0004]

Claims (11)

Steller ( 6 ) for adjusting an actuator ( 5 ), in particular a motor vehicle ( 1 ), - with a servomotor ( 16 ), which has a drive shaft ( 17 ), - with an output shaft ( 25 ), which are axially parallel and radially spaced from the drive shaft ( 17 ) is rotatably mounted, - with a rotationally fixed to the drive shaft ( 17 ) mounted input gear ( 18 ), - with a rotationally fixed to the output shaft ( 25 ) mounted output gear ( 26 ), - with at least one drive intermediate drive ( 19 ), which is a first drive gear ( 28 ) and a second drive gear ( 29 ), which are arranged axially adjacent and rotatably connected to each other, - with at least one output intermediate drive ( 27 ), which with at least one such drive intermediate drive ( 19 ), wherein the respective drive intermediate drive ( 19 ) parallel to the drive shaft ( 17 ) and relative to the drive shaft ( 17 ) is rotatably mounted, - wherein at least one such drive intermediate drive ( 19 ) on a pen ( 20 ) is rotatably mounted, the axis parallel to the drive shaft ( 17 ) and relative to the drive shaft ( 17 ) rotatably in a controller housing ( 36 ) of the author ( 6 ), - wherein a cup-shaped cover ( 21 ) the input gear ( 18 ) at least partially surrounds and axially from the input gear ( 18 ) spaced and radially extending ceiling wall ( 23 ), the ceiling wall ( 23 ) a bearing opening ( 24 ) coaxial with the pin ( 20 ), the pin ( 20 ) in the bearing opening ( 24 ) is mounted radially. Controller according to claim 1, characterized in that the pin ( 20 ) coaxial with the drive shaft ( 17 ) is arranged. Controller according to claim 1 or 2, characterized in that the actuator housing ( 36 ) a first housing part ( 37 ) and a second housing part ( 37 ) closing second housing part ( 38 ), wherein the input gear ( 18 ) in the first housing part ( 37 ) is arranged. Actuator according to claim 3, characterized in that the pin ( 20 ) additionally in the second housing part ( 38 ) is mounted radially. Controller according to one of claims 1 to 4, characterized in that the cover ( 21 ) in one piece, in particular of the same material, is formed. Controller according to one of claims 3 to 5, characterized in that the cover ( 21 ) and the first housing part ( 37 ) in one piece, in particular of the same material, are formed. Controller according to one of claims 1 to 6, characterized in that the input gear ( 18 ) with such an output intermediate drive ( 27 ) is engaged, wherein the cover ( 21 ) to this output intermediate drive ( 27 ) is open. Controller according to one of claims 1 to 7, characterized in that - the respective output intermediate drive ( 27 ) a first output gear ( 30 ) and a second output gear ( 31 ), which are arranged axially adjacent and rotatably connected to each other, - that the respective output intermediate drive ( 27 ) coaxial with the output shaft ( 25 ) and relative to the output shaft ( 25 ) is rotatably mounted, - wherein one of the drive gears ( 28 . 29 ) of such a drive intermediate drive ( 19 ) with the output gear ( 26 ) and one of the output gears ( 30 . 31 ) of such an output intermediate drive ( 27 ) with the input gear ( 18 ) is engaged, - wherein the remaining drive gears ( 28 . 29 ) each with such a driven gear ( 30 . 31 ) are engaged. Actuator according to one of Claims 1 to 8, characterized in that the servomotor ( 16 ) coaxial with the drive shaft ( 17 ) is arranged. Seller according to one of claims 1 to 9, characterized in that at least one such intermediate drive drive ( 19 ) on the input gear ( 28 ) facing away from the ceiling wall ( 23 ) is arranged. Motor vehicle ( 1 ) with at least one actuator ( 5 ) and at least one actuator ( 6 ) according to one of claims 1 to 10 for adjusting at least one such actuator ( 5 ), wherein the actuator ( 5 ) for adjusting the actuator ( 5 ) with the output shaft ( 25 ) of such a writer ( 6 ) is drive-connected.

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