JP4386878B2 - Arrangement structure of inhibitor switch of automatic transmission - Google Patents

Description

  The present invention relates to a structure of an automatic transmission, and more particularly to an arrangement structure of an inhibitor switch.

  The inhibitor switch is a rotary switch attached to the operation system of the automatic transmission. The position of the range select lever operated by the driver is detected and an electric signal corresponding to the position is output. The attachment position of the inhibitor switch is determined by the operation system and is attached to the outside of the automatic transmission case. For example, a manual shaft that passes through the automatic transmission case and transmits the movement of the select lever to the inside of the automatic transmission is provided. By assembling the inhibitor switch on the manual shaft, the contact of the switch is switched by rotating integrally with the manual shaft, like the internal rotating member.

  Here, various problems arise when the manual shaft is disposed horizontally in the lower part of the automatic transmission. For example, when an automatic transmission is installed horizontally on a vehicle together with an engine, it is necessary to connect the end of the manual shaft at the rear of the vehicle to the select lever in the vehicle interior. The inhibitor switch to be interlocked is provided on the vehicle front side surface of the transmission case. Therefore, it is difficult to ensure a predetermined clearance between the inhibitor switch and a vehicle front part such as a radiator.

In order to solve these problems, a manual shaft mounting structure has been devised, and a manual shaft that extends in the vertical direction between a plurality of shafts of an automatic transmission is disclosed (for example, Patent Document 1). In this attachment structure, the inhibitor switch is attached to the upper portion of the transmission housing and is coupled to the upper end portion of the manual shaft protruding from the transmission housing. Therefore, the inhibitor switch can be disposed with sufficient space.
JP 2004-169847 A

  However, since the inhibitor switch is attached to the outside of the transmission housing, if the inhibitor switch is transported with the inhibitor switch attached to the transmission before being installed on the vehicle side, the harness connection part of the inhibitor switch is damaged by contact. There was a problem such as. In particular, it has been necessary to protect the inhibitor switch from contact from the front side direction or the upper side direction of the transmission to which the inhibitor switch is attached.

  The present invention has been made paying attention to the above-described problem, and an object thereof is to provide an automatic transmission having an inhibitor switch mounting structure capable of preventing damage to the inhibitor switch.

In order to achieve the above object, in the automatic transmission according to claim 1, the manual shaft penetrates the vehicle front side of the transmission housing in the vertical direction so as to protrude outwardly above the transmission housing, and the inhibitor switch is connected to the automatic transmission. in an automatic transmission having a structure attached to the manual shaft upper portion which protrudes to the transmission housing outside the transmission housing is mounted on the engine, engine mounting portion is formed on the vehicle front side surface of the engine mounting side and a first housing attached to the first housing accommodates the transmission mechanism, OH Irukura installation portion is formed on the vehicle front end and the vertical upper side of the engine mounting side opposite to the side in the mounted state a second housing were mounted to the second housing, the mounting Has a third housing which protrusions for attaching the transmission housing to the vehicle body is formed in the vertical upper end of the side, and with attached to the vehicle body in the vertical above the third housing, the transmission housing A straight line connecting the protruding portion at the vehicle front end of the engine mounting portion and the protruding portion at the vehicle front end of the oil cooler installation portion when the upper front is viewed from the vertical axis direction is defined as a first boundary line, A second boundary is defined as a straight line connecting a protrusion at a vertically upper end of the engine mounting portion and a protrusion for mounting the transmission housing to the vehicle body when the front side of the transmission housing is viewed from the front-rear axis direction. The inhibitor switch is mounted at a position closer to the transmission housing than the first boundary line and to the transmission housing from the second boundary line. Provided on the side.

  Therefore, in the automatic transmission according to the present invention, the inhibitor switch can be prevented from being damaged.

  Hereinafter, the best mode for realizing the present invention will be described based on a first embodiment.

  First, the configuration of the automatic transmission according to the first embodiment will be described. Hereinafter, the arrow direction in the drawings is defined as the vehicle front radiator side.

[Outline of automatic transmission]
FIG. 1 is a schematic sectional view showing an automatic transmission according to the present invention. The transmission housing 100 includes a first housing 110, a second housing 120, and a third housing 130. In the transmission housing 100, there are a torque converter 200 that amplifies torque from the engine, a forward / reverse switching mechanism 300 having a starting clutch, a belt-type continuously variable transmission mechanism 400 that continuously changes speed between input and output, and an idler gear 500. And a differential gear 600. In addition, a vane pump 700, an oil strainer 710, a control valve unit 720, and an oil cooler 730 (see FIG. 2) are provided as mechanisms for supplying pressure oil and lubricating oil to each device.

  The torque converter 200 transmits power directly during high-speed traveling, a pump impeller connected to the engine output shaft 10, a turbine runner connected to the transmission input shaft 20, a stator for regulating the flow of internal hydraulic oil, and the like. And a lock-up clutch.

  The forward / reverse switching mechanism 300 is a planetary gear mechanism having a sun gear connected to the engine side and having a forward clutch, a carrier connected to a reverse brake, and a ring gear connected to the primary pulley 410 and having a forward clutch. It is composed of The planetary gear mechanism may be a single pinion type or double pinion type planetary gear, and is not particularly limited.

  The belt-type continuously variable transmission mechanism 400 integrally rotates a primary pulley 410 (movable pulley 410a and fixed pulley 410b) that rotates integrally with the rotation input from the forward / reverse switching mechanism 300, and drive wheels at a predetermined reduction ratio. It is composed of a secondary pulley 420 (movable pulley 420a and fixed pulley 420b) and a belt 430 wound between the grooves of each pulley. The output gear 40 is fixed to the end of the secondary pulley shaft 30 provided in the secondary pulley 420 and meshed with the idler gear 500.

  Two pinions of the differential gear 600 are fixed to the idler gear 500, and side gears are engaged with these pinions from the left and right, respectively. A drive shaft is connected to each side gear, and the left and right drive wheels are driven.

  The vane pump 700 includes a rotor, a cam ring that is eccentrically attached to the rotor, and a vane that partitions an oil chamber constituted by the rotor and the cam ring. The vanes are fitted into the grooves of the rotor, and the hydraulic oil supplied to the rotor central shaft and the oil passages provided in the grooves presses the vanes against the cam ring by centrifugal force when the rotor rotates. A driven sprocket 701 is fixed to the end of the rotor on the torque converter 200 side, and is connected to a drive sprocket 50 that rotates integrally with the transmission input shaft 20 via a chain 51.

  An oil strainer 710 is provided on the suction port side of the vane pump 700, and a control valve unit 720 is provided on the discharge port side. On the upper surface of the control valve unit 720, electronic components 721 that are a plurality of electromagnetic control valves and various sensors (such as an oil temperature sensor and a hydraulic pressure sensor) are arranged (see FIG. 2).

Inside the oil cooler 730, a cooling water chamber to which cooling water is supplied and a lubricating oil chamber to which lubricating oil is supplied are adjacently configured in layers. As shown in FIG. 2, the cooling water chamber of the oil cooler 730 includes a water supply waterway 731 water cooling water from Oiruku La 730 to the engine, and a feed water passage 732 through which cooling water cooled by the radiator is supplied It is connected. Further, the oil chamber of the oil cooler 730 is connected to a supply oil passage 123 to which high-temperature lubricating oil is supplied and a discharge oil passage 124 for discharging the cooled lubricating oil through an oil filter (not shown). .

  The supply oil passage 123 is formed in the second housing 120 and communicates the control valve unit 720, the oil pan 740, and the oil cooler 730. A drain oil passage 124 is also formed in the second housing 120 and communicates with each device such as the belt-type continuously variable transmission mechanism 400 and supplies lubricating oil.

[Arrangement of devices in the transmission case]
2 is a view of the second housing 120 viewed from the first housing 110 side, FIG. 3 is a view of the second housing 120 viewed from the third housing 130 side, and FIG. 4 is a view of the second housing 120 shown in FIGS. 3 is a view seen from the front direction shown in FIG. 2 and 3, the belt type continuously variable transmission mechanism 400, the idler gear 500, the differential gear 600, and the vane pump 700 are schematically represented by circles. The circles indicated by dotted lines in FIG. 2 and FIG. 3 indicate devices that are housed on the opposite side across a partition wall.

  As shown in FIG. 2, the belt type continuously variable transmission mechanism 400 is housed in the first housing chamber 121. In the belt-type continuously variable transmission mechanism 400, the primary pulley 410 is housed in the lower front portion of the first housing chamber 121, and the secondary pulley 420 is housed in the upper rear side of the first housing chamber 121. Further, the lower part of the first housing chamber 121 is open, and the lubricating oil that has lubricated each device is discharged from the opening to the oil pan 740.

  The control valve unit 720 and the electronic component 721 are housed in a third housing chamber 129 that is formed to project forward from the second housing 120. In the third housing chamber 129, a harness insertion hole 126 for inserting a harness connected to the electronic component 721 is formed.

  A plurality of inspection oil passages 127 for supplying pressure oil to a tester (not shown) for inspecting the hydraulic pressure generated in the control valve unit 720 during product inspection are formed in front of the third storage chamber 129. . The plurality of inspection oil passages 127 are formed adjacent to each other, and the supply oil passage 123 and the discharge oil passage 124 are also formed adjacent to each other.

Above the third storage chamber 129 and the inspection oil passage 127, an oil cooler installation portion 122 for installing the oil cooler 730 is formed integrally with the second housing 120. As shown in FIGS. 2 and 4, the oil cooler installation part 122 is formed so as to protrude to the upper part from which the third storage chamber 129 protrudes. Further, in order to shorten the piping between the supply water passage 732 and the radiator for supplying the cooling water, the oil cooler installation part 122 is disposed on the radiator side when the second housing 120 is mounted on the vehicle.

  A rotation speed sensor insertion hole 125 for inserting the rotation speed sensor of the primary pulley 410 is formed between the third housing chamber 129 and the oil cooler installation portion 122.

  By adopting the configuration as described above, it is possible to concentrate the components related to the control valve unit 720 downward and to concentrate the components related to the oil cooler 730 in the upper portion.

  As shown in FIG. 3, the idler gear 500, the differential gear 600, and the vane pump 700 are housed in the second housing chamber 128 on the torque converter 200 side, that is, the vehicle rear side. The differential gear 600 is housed in the lower part on the rear side of the second housing chamber 128. The idler gear 500 is disposed so as to mesh with the output gear 40 fixed to the secondary pulley shaft 30 and the differential gear 600.

[Inhibitor switch layout]
FIG. 5 is a diagram showing the arrangement of the devices in the first housing 110 and the second housing 120 when viewed from the third housing 130 side, and the right side of the thick curve in FIG. The inside of the second housing 120 is shown on the left side.

  In the second housing 120, a partition that separates the first housing 110 side and the third housing 130 side is formed by a support portion that supports the shaft of each device.

  A parking mechanism 800 including a parking gear 801, a parking pole 802, a holding plate 803, and the like is on the first housing 110 side of the partition wall of the second housing 120 and outside the belt 430 of the belt type continuously variable transmission mechanism 400. Is arranged.

The manual shaft 808 and the manual plate 809 are disposed on the third housing side of the partition wall of the second housing 120, and above the forward / reverse switching mechanism receiving portion 124 of the forward / reverse switching mechanism 300 or on the vehicle front side .

  The upper end of the manual shaft 808 passes through the transmission housing 100 and is attached to the manual lever 811 outside the transmission housing 100. The lower end of the manual shaft 808 penetrates the transmission housing 100 and is fixed by a bolt 819 from the outside.

  The manual lever 811 is connected to a select lever (not shown) via a control cable (not shown), and is rotated by operating the select lever. The manual shaft 808 rotates together with the manual lever 811. In the manual shaft 808 outside the transmission housing 100, an inhibitor switch 900 is attached below the manual lever 811 attachment portion. The inhibitor switch 900 rotates integrally with the manual shaft 808.

  FIG. 6 is a front view of the transmission housing 100 as viewed from the upper side opposite to the oil pan 740. The inhibitor switch 900 is provided in the inhibitor switch case 901. The inhibitor switch case 901 is fastened to the upper part of the second housing 120 with bolts 903 and 904. A manual shaft 808 penetrates a main part of the fan-shaped inhibitor switch case 901. The arc portion of the fan of the inhibitor switch case 901 is directed forward, and a connector 902 for connection with a harness toward the vehicle body is integrally provided at a portion of the arc on the third housing side.

  The inhibitor switch 900 includes a plurality of fixed contacts in the inhibitor switch case 901, and the contact between the movable contact rotating with the manual shaft 808 and the fixed contact is switched according to the rotation of the manual shaft 808. The connector 902 is provided with a plurality of terminals connected to the movable contact and the fixed contact. These terminals are connected to harnesses directed toward the vehicle body.

  A protrusion 132a is provided at the joint 132 of the third housing 130 with the engine. The protruding portion 132a is a portion located in the forefront of the drawing in the joint portion 132. The oil cooler installation part 122 is provided with a protruding part 122a. The protruding part 122a is a part located in the forefront of the drawing. The connector 902, the protrusion 122a, and the protrusion 132a of the inhibitor switch 900 are at substantially the same height from the bottom surface 740 of the automatic transmission. Here, if a straight line connecting the protruding portion 132a and the protruding portion 122a is defined as L1, the inhibitor switch 900 is arranged closer to the transmission housing 100 than L1 with L1 as a boundary. L1 corresponds to the first boundary line of claim 1.

  Similarly, a protrusion 131 a is provided on the flange 131 where the third housing 130 is joined to the second housing 120. The protrusion 131a is a portion formed in the forefront of the drawing. If a straight line connecting the protruding portion 131a and the protruding portion 122a is defined as L′ 1, the inhibitor switch 900 is arranged closer to the transmission housing 100 than L′ 1 with L′ 1 as a boundary. L′ 1 corresponds to the third boundary line of claim 2.

  In FIG. 6, the protrusion 131a is on a straight line L1 connecting the protrusion 122a and the protrusion 132a, so L1 and L′ 1 coincide with each other and are drawn as the same straight line. However, the protruding portion 131a may be formed long in the forward direction beyond L1, and may be formed short in the backward direction without exceeding L1. That is, in the first embodiment, L1 and L′ 1 do not necessarily have a configuration that matches.

  FIG. 7 is a front view of the transmission housing 100 as viewed from the first housing 110 side. An upper portion of the first housing 110 opposite to the oil pan 740 is formed in a shape protruding upward to attach the transmission housing 100 to the vehicle body, and mounting bolts 110a, 110b, and 110c are provided. A protrusion 110d is formed at the base of the bolt 110b. The protrusion 110d is located at the top of the transmission housing 100 in the figure.

FIG. 8 is a front view of the transmission housing 100 as viewed from the front radiator side. A straight line connecting the protruding portion 110d corresponding to the attachment portion of the transmission housing 100 to the vehicle body and the protruding portion 132b on the opposite side of the oil pan 740 of the third housing 130 is defined as L2. The inhibitor switch 900 is disposed closer to the transmission housing 100 than L2 with L2 as a boundary. L2 corresponds to the second boundary line of claim 1.

  FIG. 9 is a front view of the third housing 130 as viewed from the engine side. A recess 133 for attaching the torque converter 200 is formed in the front. A drive shaft opening 134 is provided at the center of the recess 133. A semicircular recess 134 for attaching a starter motor is formed in front of the recess 133 and on the upper side of the drawing. A portion of the flange portion 132 in front of the concave portion 134 and on the upper side of the drawing corresponds to the protruding portion 132a of FIG.

  In front of the protrusion 132a and on the upper side of the drawing, the protrusion 131a of the flange 131 provided for attaching the third housing 130 to the second housing 120 in the drive shaft direction is in the outer diameter direction of the drive shaft. It protrudes. The bolt hole 131b provided in the protrusion 131a protrudes outside the flange 132, that is, in the outer diameter direction of the drive shaft.

[Operation of inhibitor switch arrangement structure]
As shown in FIG. 6, the inhibitor switch 900 has a recessed portion sandwiched between the oil cooler installation portion 122 and the starter motor mounting protrusion 132 a when the transmission housing 100 is viewed from the upper side opposite to the oil pan 740. Is arranged. Further, as shown in FIG. 7, when the transmission housing 100 is viewed from the first housing 110 side, the transmission housing 100 is disposed in a recessed portion sandwiched between the vehicle body mounting protrusion 110 d and the oil cooler installation portion 122. Further, as shown in FIG. 8, when the transmission housing 100 is viewed from the front, the transmission housing 100 is disposed in a recess sandwiched between the vehicle body mounting protrusion 110d and the engine mounting flange protrusion 132b.

  Specifically, the inhibitor switch 900 is disposed on the transmission housing 100 side with L1 or L′ 1 as a boundary. Therefore, when the transmission housing 100 is landed on the plane including the straight line L1 or L′ 1 with the front side surface of the transmission housing 100 as a landing point, the inhibitor switch case 901 and the connector 902 formed integrally therewith are It has the effect that it does not come into contact with the landing surface.

  Similarly, the inhibitor switch 900 is disposed on the transmission housing 100 side with L2 as a boundary. Therefore, when the upper side surface opposite to the oil pan 740 of the transmission housing 100 is attached to the vehicle body, the inhibitor switch case 901 and the connector 902 formed integrally therewith do not come into contact with the vehicle body attachment surface. Further, when the transmission housing 100 is landed on the plane including the straight line L2 with the upper surface opposite to the oil pan 740 of the transmission housing 100 as a landing point, the inhibitor switch case 901 and the connector formed integrally therewith. 902 has an effect that it does not come into contact with the plane.

  As shown in FIG. 9, when the third housing 130 is viewed from the front on the engine side, a bolt hole 131b provided for attaching the third housing 130 to the second housing 120 is located in front of the projecting portion 132a and above the drawing. In the direction of the outer diameter of the drive shaft and protrudes outside the flange 132. That is, even in the case where the starter motor is provided in front of the third housing 130 and on the upper side of the drawing, the second direction side in the drawing corresponding to the drive shaft direction of the portion 134 provided with the starter motor, that is, the second The third housing 130 can be easily attached to the second housing 120 at the portion 131 a of the flange portion 131 on the housing 120 side.

[Effect of Example 1]
As described above, in the automatic transmission according to the first embodiment, the manual shaft 808 passes through the vehicle front side of the transmission housing 100 in the vertical direction so as to protrude outward above the transmission housing 100, and the inhibitor switch 900 is In the automatic transmission having a structure attached to the upper end portion of the manual shaft 808 protruding to the outside of the transmission housing 100, the transmission housing 100 includes an engine mounting portion 132 formed on the front side of the vehicle on the side of the engine mounting side. In order to attach the transmission housing 100 to the vehicle body on the front side of the vehicle on the side facing the engine mounting side and vertically above the vehicle, and on the side of the side facing the engine mounting side. A projecting portion 110d formed, and A first straight line connecting the protrusion 132a on the vehicle front side of the engine mounting portion 132 and the protrusion 122a on the vehicle front side of the oil cooler installation portion 122 when the upper front surface of the machine housing 100 is viewed from the vertical axis direction. This is defined as a boundary line L1, and is formed to attach the transmission housing 100 to the vehicle body, and a protrusion 132b vertically above the engine mounting portion when the front side of the transmission housing 100 is viewed from the front-rear axis direction. When the straight line connecting the projecting portion 110d is defined as the second boundary line L2, the mounting position of the inhibitor switch 900 is set to the transmission housing 100 side of the first boundary line L1 and the second boundary line. The transmission housing 100 is provided closer to the transmission housing 100 than L2.

  Due to such a configuration, when handling the automatic transmission, even if the inhibitor switch 900 is transported while being attached to the transmission housing 100, the connector 902 of the inhibitor switch 900, particularly the harness connection portion, is easily damaged. Will not be damaged. Inhibitor switch 900 is protected from contact from the front side or top side of the transmission, which is particularly susceptible to damage. Therefore, there is an effect that it is possible to avoid a failure such that the engine does not start even when the shift lever of the automatic transmission is in a parking or neutral state.

  The transmission housing 100 includes a housing portion 130 attached to the engine and other housing portions 110 and 120. The housing portion 130 includes the engine attachment portion 132, and the other housing portion. 120 has the oil cooler installation part 122 and the projecting part 110d, and the mounting position of the inhibitor switch 900 is such that the housing part 130 and the When a straight line connecting the vehicle front side protruding portion 131a of the joint portion 131 with the other housing portion 120 and the protruding portion 122a is defined as a third boundary line L′ 1, the straight line connecting the protruding portion 122a is more than the second boundary line L2. On the transmission housing side and on the transmission housing 100 side with respect to the third boundary line L′ 1. Digits.

  Therefore, even when the starter motor mounting portion 134 is formed, the inhibitor switch 900 can be protected by the arrangement of the inhibitor switch 900 using the formation site.

  Further, the joint portion 131 has a plurality of bolt holes formed for joining, and the joint portion 131 at a position facing the protruding portion 132a formed on the vehicle front side of the engine mounting portion includes A projecting portion 131a is formed so as to project to the front side of the vehicle when the engine mounting side front is viewed from the drive shaft direction and has the bolt hole 131b.

  Therefore, the inhibitor switch 900 can be protected and the housings 120 and 130 can be easily attached to each other. Therefore, it is possible to increase the degree of freedom of the starter motor mounting position, improve the workability of the housing assembly, and protect the inhibitor switch 900 at the same time.

[Other Examples]
The best mode for carrying out the present invention has been described based on the first embodiment. However, the specific configuration of the present invention is not limited to the first embodiment and does not depart from the gist of the present invention. Any changes in the design of the range are included in the present invention.

  For example, in the first embodiment, the inhibitor switch arrangement structure of the present invention is applied to an automatic transmission for a two-wheel front-wheel drive vehicle, but may be used for an automatic transmission for a rear-wheel drive vehicle. You may use for a transmission.

1 is a schematic cross-sectional view illustrating an automatic transmission according to a first embodiment. It is the front schematic diagram which looked at the 2nd housing of Example 1 from the 1st housing side. It is the front schematic diagram which looked at the 2nd housing of Example 1 from the 3rd housing side. It is the front schematic diagram which looked at the 2nd housing of Example 1 from the front direction shown in FIG. 2 and FIG. It is a schematic diagram for demonstrating the inhibitor switch attachment position of Example 1. FIG. FIG. 3 is an upper side front view of the transmission housing according to the first embodiment. It is the front view which looked at the transmission housing of Example 1 from the 1st housing side. FIG. 3 is a front elevation view of the transmission housing according to the first embodiment. It is the front view which looked at the 3rd housing of this example 1 from the engine side.

Explanation of symbols

100 Transmission housing 110 First housing 120 Second housing 122 Oil cooler installation part 130 Third housing 730 Oil cooler 740 Oil pan 808 Manual shaft 900 Inhibitor switch 902 Inhibitor switch connector

Claims (3)

An automatic structure having a structure in which a manual shaft vertically penetrates the vehicle front side of the transmission housing so as to protrude outwardly above the transmission housing, and an inhibitor switch is attached to an upper end portion of the manual shaft protruding outside the transmission housing. In the transmission,
The transmission housing is
Attached to the engine, a first housing engine mounting portion is formed on the vehicle front side surface of the engine mounting side,
Attached to the first housing accommodates a transmission mechanism, a second housing o Irukura installation portion is formed at the vehicle front end and the vertical upper side of the engine mounting side opposite to the side in the mounted state,
Attached to said second housing has a third housing which protrusions for attaching the transmission housing to the vehicle body in the vertical upper end of the side surface of the mounting side is formed, and
Attached to the vehicle body vertically above the third housing,
When the transmission housing upper front is viewed from the vertical axis direction, a straight line connecting a protrusion at the vehicle front end of the engine mounting portion and a protrusion at the vehicle front end of the oil cooler installation portion is defined as a first boundary line. Define
A straight line connecting a protrusion at a vertically upper end of the engine attachment portion and a protrusion for attaching the transmission housing to a vehicle body when the front side of the transmission housing is viewed from the front-rear axis direction is a second boundary line. When defined
2. The automatic transmission according to claim 1, wherein an attachment position of the inhibitor switch is provided on the transmission housing side with respect to the first boundary line and on the transmission housing side with respect to the second boundary line. Look at the front Symbol transmission housing upper front from the vertical axis, and the projection of the vehicle front end of the junction between the second housing and the first housing, and a projecting portion of the vehicle front end of the oil cooler installation portion When the straight line connecting the and is defined as the third boundary line,
The mounting position of the inhibitor switch is provided on the transmission housing side with respect to the second boundary line and on the transmission housing side with respect to the third boundary line. Automatic transmission. The joint has a plurality of bolt holes formed for joining,
The joint portion at a position facing the protruding portion formed at the vehicle front end of the engine mounting portion is formed so as to protrude toward the vehicle front side when the side surface on the engine mounting side is viewed from the drive shaft direction, The automatic transmission according to claim 2, wherein a protrusion having the bolt hole is provided.

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