JP2013142442A - Power transmission device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress abrasion of a valve body caused by pulsation of input pressure of a solenoid valve, and to suppress detachment of the solenoid valve from the valve body before an oil pressure control device is fixed to a transmission case in the oil pressure control device in which at least either of the solenoid valves is fixed to the transmission case together with the valve body.SOLUTION: A first solenoid valve S1 has a first bracket 110, fixed to a transmission case 22 together with a valve body 31 by a bolt V1 at a left-hand side of assembling direction toward the valve body 31, and a protrusion 125 protruded in a right-hand side of the assembling direction. A second solenoid valve S2 has a second bracket 210, fixed to the valve body 31 by a bolt V2 in the left-hand side of the assembling direction toward the valve body 31, and a retainer 215 capable of abutting with the protrusion 125 of the first solenoid valve S1 at the left-hand side of the assembling direction.

Description

  The present invention relates to a power transmission device that includes a transmission, a hydraulic control device that generates hydraulic pressure for operating the transmission by regulating hydraulic oil from an oil pump, and a transmission case that houses the transmission.

  Conventionally, as a hydraulic control device (solenoid valve device) in this type of power transmission device, a plurality of valves in which a solenoid valve having a valve portion with a seal member fitted on the outer periphery and a mounting bracket having a fastening portion are integrated. A device including a unit and a valve body into which a valve portion of each valve unit is inserted is known (for example, see Patent Document 1). In this hydraulic control device, a plurality of valve units can be connected to the valve body by bolting the fastening portion of the mounting bracket to the valve body with the valve portion of each valve unit inserted in a predetermined insertion position of the valve body. It is fixed at a predetermined mounting position.

Japanese Patent Laid-Open No. 10-47479

  As described above, when the mounting bracket is bolted to the valve body, the distal end portion (valve portion) of the solenoid valve is pressed against the valve body by tightening the bolt. In addition, a hydraulic pressure from the oil pump side, such as a line pressure, is supplied to the solenoid valve as an input pressure, and a force in a direction for separating the solenoid valve from the valve body is applied by the action of the input pressure. Therefore, for example, when the bolt is a right-hand thread and the mounting bracket (fastening portion) is located on the right side in the insertion direction of the solenoid valve with respect to the valve body, the solenoid valve is subjected to the above-described action of the input pressure. A force (moment) around the axis of the bolt opposite to the pressing force by tightening the bolt is applied. When the pulsation occurs in the input pressure of the solenoid valve and the force around the axis of the bolt due to the action of the input pressure increases, the tip of the solenoid valve moves away from the valve body, and the shaft of the bolt due to the action of the input pressure When the force around the center is reduced, the tip of the solenoid valve is pressed against the valve body again by the pressing force generated by tightening the bolt. For this reason, when the pulsation of the input pressure of the solenoid valve cannot be satisfactorily suppressed, the valve body wears (fretting wear) due to the movement (vibration) of the tip of the solenoid valve as described above. There is a fear.

  In order to suppress such wear of the valve body, the pressing force by tightening the bolt and the force around the axis of the bolt by the action of the input pressure are applied to the plurality of solenoid valves constituting the hydraulic control device. It is preferable that the mounting brackets are integrated so that the directions match, and each mounting bracket is fixed to the valve body with a bolt. However, this configuration requires a bolt and a bolt fastening portion (pedestal portion) of the valve body for each mounting bracket, and in view of the demand for a compact valve body, such a configuration is actually adopted. Is not easy.

  On the other hand, in order to reduce the number of bolts and bolt fastening parts of the valve body, at least one of the solenoid valves is fixed together with the valve body with bolts (co-tightened) to the transmission case to which the valve body is fixed. Can be considered. However, in such a configuration, at least one of the solenoid valves cannot be fixed to the valve body until the hydraulic control device is fixed to the transmission case. In such a case, the solenoid valve is detached from the valve body, and there is a possibility that the inspection with the hydraulic control device alone cannot be performed properly.

  Therefore, the present invention suppresses the wear of the valve body due to the pulsation of the input pressure of the solenoid valve in a power transmission device including a hydraulic control device in which at least one solenoid valve is fixed to the transmission case together with the valve body. The main object is to prevent the solenoid valve from being detached from the valve body before the hydraulic control device is fixed to the transmission case.

  The power transmission device according to the present invention employs the following means in order to achieve the main object.

The power transmission device according to the present invention includes:
In a power transmission device comprising: a transmission; a hydraulic control device that generates hydraulic pressure for adjusting hydraulic oil from an oil pump to operate the transmission; and a transmission case that houses the transmission.
The hydraulic control device includes a valve body that is fixed to the transmission case, and a first solenoid valve and a second solenoid valve that are assembled to the valve body and that regulate and output an input pressure,
The valve body has a bolt hole through which the first bolt is inserted, and is fixed to the transmission case by screwing the first bolt penetrating the bolt hole into the transmission case.
The first solenoid valve is located on the left side in the assembly direction of the first solenoid valve with respect to the valve body, and is fixed to the transmission case together with the valve body by the first bolt, and the assembly Having a protruding portion protruding to the right side of the direction,
The second solenoid valve is positioned on the left side in the assembly direction of the second solenoid valve with respect to the valve body, and is positioned on the left side in the assembly direction with a second bracket fixed to the valve body by a second bolt. In addition, the first solenoid valve has a retaining portion that can come into contact with the protruding portion so as not to be detached from the valve body.

  In the hydraulic control device constituting this power transmission device, the first bracket located on the left side of the assembly direction of the first solenoid valve with respect to the valve body is fixed (jointly tightened) together with the valve body to the transmission case by the first bolt. The first solenoid valve is fixed to the valve body. Further, the second solenoid valve is fixed to the valve body by fixing the second bracket located on the left side in the assembly direction of the second solenoid valve to the valve body with the second bolt. As a result, even if a general right-hand screw type is used as the first and second bolts, the pressing force acting on the first and second solenoid valves by tightening the first and second bolts and the action of the input pressure Thus, the direction of the force around the axis of the bolt applied to the first and second solenoid valves can be matched. As a result, even if pulsation occurs in the input pressure of the first and second solenoid valves, the state in which the first and second solenoid valves are pressed against the valve body can be satisfactorily maintained. It is possible to satisfactorily suppress the wear of the valve body due to the above. The first solenoid valve has a protruding portion that protrudes to the right in the assembly direction, and the second solenoid valve is located on the left in the assembly direction so as not to separate the first solenoid valve from the valve body. Has a retaining portion capable of coming into contact with the protruding portion. Thus, even before the hydraulic control device is fixed to the transmission case, if the second solenoid valve is fixed to the valve body by the second bolt, the first solenoid valve protrudes when it is likely to be detached from the valve body. Since the portion comes into contact with the retaining portion, it is possible to prevent the first solenoid valve from being detached from the valve body. Therefore, in this power transmission device, the first solenoid valve fixed to the transmission case together with the valve body suppresses the wear of the valve body due to the pulsation of the input pressure of the first and second solenoid valves. It is possible to prevent the valve body from being detached before being fixed to the transmission case.

  Further, the second bracket may include the retaining portion. As a result, the entire second solenoid valve having the second bracket and the retaining portion can be made compact.

  Furthermore, the second bracket may include a fastening portion having a bolt hole through which the second bolt is inserted, and the retaining portion may be extended from the fastening portion toward the surface of the valve body. The protruding portion is formed between the surface of the valve body and the fastening portion of the second bracket without contacting the retaining portion when the first and second solenoid valves are assembled to the valve body. It may be located.

  The protrusion may be extended toward the surface of the valve body so as not to contact the surface of the valve body when the first solenoid valve is assembled to the valve body. This makes it possible to cause the protrusion to function as a detent that restricts the first solenoid valve from rotating around the shaft center with respect to the valve body before the hydraulic control device is fixed to the transmission case. And, when the first solenoid valve is assembled to the valve body, the projecting portion is configured not to come into contact with the surface of the valve body, so that the first solenoid valve having the projecting portion can be easily assembled. can do.

  Further, the retaining portion contacts the projection when the tip of the projection contacts the surface of the valve body as the valve body rotates about the axis of the first solenoid valve. It may be configured to be possible. As a result, even if the first solenoid valve rotates around the shaft center with respect to the valve body before the hydraulic control device is fixed to the transmission case, the retaining portion prevents the first solenoid valve from being detached from the valve body. It becomes possible to do.

It is a schematic block diagram of the motor vehicle 10 which is a vehicle carrying the power transmission device 20 by this invention. 3 is an enlarged view of a main part of a hydraulic control device 30 included in the power transmission device 20. FIG. 3 is a plan view showing a first solenoid valve S1 of the hydraulic control device 30. FIG. FIG. 3 is a rear view of the first solenoid valve S1 as viewed from an end side that is not disposed in the valve body 31. 3 is a plan view showing a second solenoid valve S2 of the hydraulic control device 30. FIG. FIG. 5 is a rear view of the second solenoid valve S2 as viewed from an end side that is not disposed in the valve body 31. FIG. 3 is an explanatory view showing a state where first and second solenoid valves S1, S2 are assembled to a valve body 31. FIG. 3 is an explanatory view showing a state where first and second solenoid valves S1, S2 are assembled to a valve body 31.

  Next, the form for implementing this invention is demonstrated using an Example.

  FIG. 1 is a schematic configuration diagram of an automobile 10 that is a vehicle equipped with a power transmission device 20 according to the present invention. In addition to the power transmission device 20, the automobile 10 shown in the figure includes an engine 12 as a prime mover that is an internal combustion engine that outputs power by an explosion combustion of a mixture of hydrocarbon fuel such as gasoline and light oil and air, An engine electronic control unit (hereinafter referred to as “engine ECU”) 14 for controlling the engine 12, a brake electronic control unit (hereinafter referred to as “brake ECU”) 16 for controlling an electronically controlled hydraulic brake unit (not shown), and the like are included. . The power transmission device 20 is connected to the crankshaft of the engine 12 and transmits power from the engine 12 to the left and right drive wheels DW, and is controlled by a shift electronic control unit (hereinafter referred to as “shift ECU”) 21. Be controlled.

  The engine ECU 14 is configured as a microcomputer centering on a CPU (not shown). The engine ECU 14 detects the depression amount of the accelerator pedal 91, an accelerator opening degree Acc from the accelerator pedal position sensor 92, a vehicle speed V from the vehicle speed sensor 99, signals from various sensors such as a crankshaft position sensor (not shown), a brake ECU 16 Based on signals from the shift ECU 21, etc., an electronically controlled throttle valve, fuel injection valve, spark plug, etc., not shown, are all controlled. The brake ECU 16 is also configured as a microcomputer centering on a CPU (not shown). The brake ECU 16 receives the master cylinder pressure detected by the master cylinder pressure sensor 94 when the brake pedal 93 is depressed, the vehicle speed V from the vehicle speed sensor 99, signals from various sensors (not shown), the engine ECU 14 and the transmission ECU 21. Based on a signal or the like, a brake actuator (hydraulic actuator) (not shown) or the like is controlled.

  The power transmission device 20 includes a torque converter (fluid transmission device) 23 housed in a transmission case 22, an oil pump 24, for example, a transmission 25 which is a stepped automatic transmission, a gear mechanism 26, and a differential mechanism. In addition to the (differential gear) 27 and the like, the embodiment includes a hydraulic control device 30 fixed to the lower portion of the transmission case 22. The torque converter 23 includes an input-side pump impeller connected to the crankshaft of the engine 12, an output-side turbine runner connected to the input shaft (input member) of the transmission 25, a stator, a lockup clutch, a damper mechanism, and the like. (Both not shown). However, instead of the torque converter 23, a fluid coupling that does not have a stator may be employed.

  The oil pump 24 is configured as a gear pump including a pump assembly including a pump body and a pump cover, and an external gear connected to the pump impeller a of the torque converter 23 via a hub, and is illustrated by power from the engine 12. The hydraulic oil (ATF) stored in the oil pan not to be sucked is sucked and fed to the hydraulic control device 30.

  The transmission 25 is capable of transmitting the power transmitted to the input shaft to the output shaft while changing the gear stage to a plurality of stages, and includes a plurality of planetary gear mechanisms and a power transmission path from the input shaft to the output shaft. Includes multiple clutches, brakes, one-way clutches, etc. to change. The output shaft of the transmission 25 is connected to the drive wheels DW via the gear mechanism 26 and the differential mechanism 27. The plurality of clutches and brakes are engaged or released by the hydraulic pressure from the hydraulic control device 30. The transmission 25 may be configured as a belt type or other type of continuously variable transmission.

  The transmission ECU 21 is also configured as a microcomputer centered on a CPU (not shown). The shift ECU 21 receives the accelerator opening Acc from the accelerator pedal position sensor 92, the vehicle speed V from the vehicle speed sensor 99, the shift range SR from the shift range sensor 96 that detects the operation position of the shift lever 95, various sensors (not shown), and the like. Based on the signals, signals from the engine ECU 14 and the brake ECU 16, etc., the torque converter 23 and the transmission 25, that is, the hydraulic control device 30 are controlled.

  The hydraulic control device 30 adjusts hydraulic oil from the oil pump 24 to generate hydraulic pressure for operating the torque converter 23 and the transmission 25, and supplies hydraulic oil to lubricating parts such as various bearings. As shown in FIG. 2, it is fixed to the lower part of the transmission case 22. The hydraulic control device 30 is attached to a valve body 31 having a plurality of oil passages (not shown), a plurality of regulator valves and relay valves (not shown) constituted by the valve body 31 and spools and springs (not shown), and the valve body 31. A plurality of solenoid valves including a first solenoid valve S1 and a second solenoid valve S2 that constitute a hydraulic circuit together with the oil passage of the valve body 31 are included.

  The valve body 31 according to the embodiment includes a first half 311 having a plurality of oil passages and a second half 312 having a plurality of oil passages and being superimposed on the first half 311. The first half 311 includes a plurality of valve insertion portions into which the first and second solenoid valves S1, S2, etc. are inserted, a cylinder insertion portion (not shown) into which a parking cylinder is inserted, and the like. The half 312 also has a valve insertion portion and the like. The first half 311 and the second half 312 are joined via a center plate 32 having a plurality of openings that allow the oil passage of the first half 311 and the oil passage of the second half 312 to communicate with each other. In the embodiment, the valve body 31 is fastened (fixed) to the transmission case 22 by a plurality of bolts (first bolts) V1 so that the first half 311 is located below the second half 312. The That is, the first half 311 of the valve body 31 has a bolt hole 311a through which the bolt V1 is inserted, and the second half 312 has a bolt hole 312a through which the bolt V1 is inserted. The bolt V1 penetrating the bolt holes 311a and 312a is screwed into the transmission case 22 to be fixed to the transmission case 22. The valve insertion portions of the first and second half portions 311 and 312 may be holes that are open at only one end, and are partially opened to expose a part of the solenoid valve (such as a sleeve). It may be configured as follows.

  The plurality of regulator valves include, for example, a primary regulator valve that adjusts the hydraulic pressure from the oil pump 24 to generate line pressure, a secondary regulator valve that adjusts the drain pressure of the primary regulator valve to generate secondary pressure, and the like. It is. In addition to the first and second solenoid valves S1 and S2, the plurality of solenoid valves adjust the line pressure generated by the primary regulator valve to generate the hydraulic pressure to the corresponding clutch and brake of the transmission 25. A plurality of linear solenoid valves (not shown) are included. The first solenoid valve S1 and the second solenoid valve S2 adjust the line pressure as the input pressure supplied from the primary regulator valve to the input port to generate a signal pressure to the corresponding relay valve (not shown). The signal pressure is supplied from the output port to the relay valve.

  As shown in FIG. 2, the first solenoid valve S1 is inserted (assembled) into a corresponding valve insertion portion of the valve body 31, and is fixed to the transmission case 22 together with the valve body 31 by a bolt V1. In addition, the second solenoid valve S2 is inserted (assembled) substantially in parallel with the first solenoid valve S1 into a corresponding valve insertion portion of the valve body 31 so as to be positioned next to the first solenoid valve S1, and a bolt (Second bolt) V2 is fixed to first half 311, that is, valve body 31. In the embodiment, the first and second solenoid valves S1 and S2 are arranged close to the oil pump 24 and a primary regulator valve that generates a line pressure as an input pressure, and the primary regulator valve and the first solenoid valve S1 The amount of hydraulic oil leakage (the location that causes leakage of hydraulic oil such as a valve) on the upstream side of the oil passage connecting the primary regulator valve and the second solenoid valve S2 is small. For this reason, when the pulsation occurs in the line pressure due to the pulsation of the discharge pressure of the oil pump 24, the line pressure is reduced by the first and second solenoid valves S1, S2 without attenuating the pulsation due to a small amount of hydraulic oil leakage. May be supplied as input pressure.

  FIG. 3 is a plan view showing the first solenoid valve S1, and FIG. 4 is a rear view of the first solenoid valve S1 as viewed from the end side where the first solenoid valve S1 is not disposed in the valve body 31 (not inserted into the valve insertion portion). . As shown in these drawings, the first solenoid valve S1 is attached to a cylindrical solenoid case 100 that accommodates a solenoid portion including a coil (not shown) or the like, and is fixed to the solenoid case 100 and a coil in the solenoid case 100. The connector 101, which is electrically connected, a first bracket 110 for fixing the first solenoid valve S1 to the valve body 31 and the transmission case 22, a stopper member 120, and the like are provided.

  The first bracket 110 includes a fixing portion 111 that is fixed to the solenoid case 100 of the first solenoid valve S1, and a fastening portion 112 that extends from the fixing portion 111 and has a bolt hole 112a through which the bolt V1 is inserted. As shown in FIGS. 3 and 4, the first bracket 110 is attached to the solenoid case 100 of the first solenoid valve S1 in the assembly direction of the first solenoid valve S1 with respect to the valve body 31 (the insertion direction with respect to the valve insertion portion, It is attached so as to be located on the left side of the arrow direction in FIG. That is, the fixing portion 111 of the first bracket 110 is fixed to the left side surface of the solenoid case 100 in the assembly direction, and the fastening portion 112 of the first bracket 110 protrudes from the solenoid case 100 to the left side in the assembly direction.

  The stopper member 120 includes a fixed portion 121 fixed to the solenoid case 100 of the first solenoid valve S <b> 1 and a protruding portion 125 extending from the fixed portion 121. As shown in FIGS. 3 and 4, the stopper member 120 is attached to the solenoid case 100 of the first solenoid valve S <b> 1 so as to be positioned on the right side of the assembly direction of the first solenoid valve S <b> 1 with respect to the valve body 31. . That is, the fixed portion of the stopper member 120 is fixed to the right side surface of the solenoid case 100 in the assembly direction, and the protruding portion 125 of the stopper member protrudes from the solenoid case 100 to the right side in the assembly direction. Further, as shown in FIG. 4, the protrusion 125 does not protrude downward from the plane (see the alternate long and short dash line in FIG. 4) whose tip (lower end in FIG. 4) circumscribes the lowermost part in FIG. 4 of the solenoid case 100. As shown, it extends downward in the figure.

  FIG. 5 is a plan view showing the second solenoid valve S2, and FIG. 6 is a rear view of the second solenoid valve S2 as viewed from the end side where the second solenoid valve S2 is not disposed in the valve body 31 (not inserted into the valve insertion portion). . As shown in these drawings, the second solenoid valve S2 is a cylindrical solenoid case 200 that houses a solenoid portion including a coil (not shown) or the like, and a coil that is fixed to the solenoid case 200 and also in the solenoid case 200. An electrically connected connector 201 and a second bracket 210 for fixing the second solenoid valve S2 to the valve body 31 are provided.

  The second bracket 210 includes a fixing portion 211 fixed to the solenoid case 200 of the second solenoid valve S2, and a fastening portion 212 extending from the fixing portion 211 and having a bolt hole 212a through which the bolt V2 is inserted. As shown in FIGS. 5 and 6, the second bracket 210 is attached to the solenoid case 200 of the second solenoid valve S <b> 2 with respect to the valve body 31 of the second solenoid valve S <b> 2 (insertion direction with respect to the valve insertion portion, It is attached so as to be located on the left side of the arrow direction in FIG. That is, the fixing portion 211 of the second bracket 210 is fixed to the left side surface of the solenoid case 200 in the assembly direction, and the fastening portion 212 of the second bracket 210 protrudes from the solenoid case 200 to the left side in the assembly direction.

  Further, a retaining portion 215 extends from the upstream end portion of the second bracket 210 in the assembly direction (lower end portion in FIG. 5). As shown in FIG. 6, the retaining portion 215 has a tip (lower end in FIG. 6) that does not protrude downward from a plane (see the alternate long and short dash line in FIG. 6) circumscribing the bottom of the solenoid case 200 in FIG. 6. It extends downward in the figure. Furthermore, from the downstream end portion (the upper end portion in FIG. 5) of the second bracket 210 in the assembly direction, the component contacts the component to be assembled to the valve body 31 before the second solenoid valve S2. And a second solenoid valve S2 are extended upward in FIG. 6 to prevent the second solenoid valve S2 from being assembled in an incorrect order.

  Next, the procedure for assembling the first and second solenoid valves S1, S2 to the valve body 31 will be described with reference to FIGS.

  When assembling the first and second solenoid valves S1 and S2 to the valve body 31, first, the tip of the first solenoid valve S1 (the portion including the input port and the output port) is connected to the valve body 31 (first half 311). Insert into the corresponding valve insert. At this time, as shown in FIGS. 7 and 8, the fastening portion 112 of the first bracket 110 is positioned on the left side of the assembly direction of the solenoid case 100, and the protruding portion 125 of the stopper member 120 is the assembly direction of the solenoid case 100. Located on the right side of

  Thus, when the first solenoid valve S1 is inserted into the corresponding valve insertion portion and assembled to the valve body 31, the back surface (the lower surface in FIG. 4) of the first bracket 110 is the first half of the valve body 31. The bolt hole 121a of the fastening part 112 is in contact with the surface of the pedestal formed in the part 311 and the bolt hole 311a of the first half part 311 and the hole part 32a formed in the center plate 32 and the second half part 312. It faces the bolt hole 312a (see FIG. 2). Further, when the first solenoid valve S1 is assembled to the valve body 31, the tip (lower end in the figure) of the protruding portion 125 of the stopper member 120 is located on the valve body 31 (or the center plate 32) as shown in FIG. It does not contact the surface (in the embodiment, the surface of the second half 312 (upper surface: see FIG. 2) 312s), and a slight gap is formed between them. Thus, the first solenoid valve S1 having the protrusion 125 is configured such that the protrusion 125 does not contact the surface of the valve body 31 when the first solenoid valve S1 is assembled to the valve body 31. Assembling property can be ensured satisfactorily.

  Next, the distal end portion (the portion including the input port and the output port) of the second solenoid valve S2 is inserted into the corresponding valve insertion portion of the valve body 31 (first half portion 311). At this time, the fastening portion 212 of the second bracket 110 is positioned on the left side in the assembly direction of the solenoid case 200, as shown in FIGS. When the second solenoid valve S <b> 2 is inserted into the corresponding valve insertion portion and assembled to the valve body 31, the back surface (the lower surface in FIG. 6) of the fastening portion 212 is formed in the first half 311 of the valve body 31. The bolt hole 212a of the fastening part 212 faces the screw hole 311c formed in the bolt fastening part 311b (see FIG. 2).

  Further, when the second solenoid valve S2 is assembled to the valve body 31, the retaining portion 215 included in the second bracket 210 has the above-described assembly more than the protruding portion 125 of the first solenoid valve S1, as shown in FIG. A slight gap G is formed between the protruding portion 125 of the first solenoid valve S1 and the retaining portion 215 included in the second bracket 210, which is located on the upstream side in the direction (lower side in FIG. 7). That is, the protrusion 125 of the first solenoid valve S1 protrudes from the solenoid case 100 to the right in the assembly direction when the first and second solenoid valves S1 and S2 are assembled to the valve body 31, and the second solenoid It is located between the surface of the valve body 31 (the surface 312s of the second half 312) and the fastening portion 212 of the second bracket 210 without contacting the retaining portion 215 of the valve S2 (see FIG. 8).

  Accordingly, when the second solenoid valve S2 is assembled to the valve body 31 before the first solenoid valve S1 is assembled to the valve body 31, the first solenoid valve S1 is to be inserted into the valve insertion portion of the valve body 31. However, since the protruding portion 125 contacts the retaining portion 215 of the second solenoid valve S2, the first solenoid valve S1 cannot be completely inserted into the valve insertion portion of the valve body 31. Therefore, in the hydraulic control device 30 according to the embodiment, it is possible to suppress the first and second solenoid valves S1 and S2 from being assembled in an incorrect order.

  After the first and second solenoid valves S1 and S2 are assembled to the valve body 31 as described above, the bolt V2 is inserted into the bolt hole 212a of the fastening portion 212 and the bolt V2 is screwed into the screw fastening portion 311b. Screwed into 311c. As a result, the second bracket 210 located on the left side in the assembly direction of the solenoid case 200 is fixed to the first half 311 of the valve body 31 and the second solenoid valve S2 is fixed to the valve body 31. As a result, even if a general right-hand screw type bolt is used as the bolt V2, the pressing force acting on the second solenoid valve S2 by tightening the bolt V2 (see the one-dot chain line in FIG. 7) and the second solenoid valve S2 The direction of the force around the axis of the bolt V2 applied to the second solenoid valve S2 (see the two-dot chain line in FIG. 7) is matched by the action of the input pressure (line pressure) (see the white arrow in FIG. 7). be able to. As a result, even if the pulsation occurs in the line pressure that is the input pressure of the second solenoid valve due to the pulsation of the discharge pressure of the oil pump 24, the second solenoid valve S2 is placed on the inner surface of the valve body 31, that is, the valve insertion portion. Since the pressed state can be maintained satisfactorily, it is possible to satisfactorily suppress the wear of the valve body 31, that is, the inner surface of the valve insertion portion due to the pulsation of the line pressure.

  Here, in the hydraulic control device 30 of the embodiment, the first and second solenoid valves S1, S2 are assembled to the valve body 31 as described above, and the second solenoid valve S2 is fixed to the valve body 31, and further When all the other or main parts necessary for the operation of the hydraulic control device 30 are assembled to the valve body 31, that is, before the hydraulic control device 30 is fixed to the transmission case 22, the device itself such as an operation check inspection is performed. Various inspections are performed. Therefore, the first solenoid valve S1 is not fixed to the valve body 31 when the hydraulic control device 30 is inspected.

  In view of this, the first solenoid valve S1 is provided with a protrusion 125 that protrudes from the solenoid case 100 to the right in the assembly direction, and the second solenoid valve S2 is provided in the assembly direction of the solenoid case 200. A retaining portion 215 that can be brought into contact with the protruding portion 125 is provided on the left side so that the first solenoid valve S <b> 1 is not separated from the valve insertion portion of the valve body 31. Accordingly, when the first solenoid valve S1 moves in a direction away from the valve insertion portion due to the action of, for example, the line pressure that is the input pressure during the inspection, the protruding portion 125 contacts the retaining portion 215 of the second solenoid valve S2. Therefore, the movement of the first solenoid valve S1 is regulated by the second solenoid valve S2 fixed to the valve body 31. Therefore, even before the hydraulic control device 30 is fixed to the transmission case 22, if the second solenoid valve S2 is fixed to the valve body 31 by the bolt V2, the first solenoid valve S1 is detached from the valve body 31. Can be prevented.

  Further, as shown by a solid line in FIG. 8, the protruding portion 125 of the first solenoid valve S <b> 1 is formed on the surface of the valve body 31 (the surface of the second half 312) when the first solenoid valve S <b> 1 is assembled to the valve body 31. 312s) is extended toward the surface of the valve body 31 so as not to come into contact therewith. Then, when the first solenoid valve S1 rotates around the axis in the direction of the arrow in FIG. 8, for example, while the valve body 31 is being transported, the protruding portion 125 contacts the surface of the valve body 31 (the surface 312s of the second half 312). It will be. Thus, the protruding portion 125 also functions as a detent that restricts the first solenoid valve S1 from rotating about the axis before the hydraulic control device 30 is fixed to the transmission case 22. The retaining portion 215 of the second solenoid valve S2 is also used when the tip of the protruding portion 125 of the first solenoid valve S1 contacts the surface of the valve body 31 (the surface 312s of the second half 312) (FIG. 8). 2), and is configured to be able to come into contact with the protruding portion 125. As a result, even if the first solenoid valve S1 rotates around the shaft center with respect to the valve body 31 before the hydraulic control device 30 is fixed to the transmission case 22, the first solenoid valve S1 is caused to move to the valve body by the retaining portion 215. It is possible to prevent separation from 31.

  After the inspection of the hydraulic control device 30 alone is completed, the valve body 31 of the hydraulic control device 30 has a plurality of bolts V1 inserted through the bolt holes 311a of the first half 311 and the bolt holes 312a of the second half 312. It is fixed to the transmission case 22 via. At this time, the bolt V1 is also inserted into the bolt hole 112a of the fastening portion 112 of the first bracket 110 protruding from the solenoid case 100 of the first solenoid valve S1 to the left in the assembly direction. By being screwed together, the first solenoid valve S1 is fixed (jointly fastened) to the transmission case 22 and the valve body 31. As a result, even if a general right-hand screw type bolt is used as the bolt V1, the pressing force acting on the first solenoid valve S1 by tightening the bolt V1 (see the one-dot chain line in FIG. 7) and the first solenoid valve S1 The direction of the force around the axis of the bolt V1 applied to the first solenoid valve S1 (see the two-dot chain line in FIG. 7) can be matched by the action of the input pressure (see the white arrow in FIG. 7). As a result, even if the pulsation occurs in the line pressure that is the input pressure of the first solenoid valve S1 due to the pulsation of the discharge pressure of the oil pump 24, the first solenoid valve S1 remains in the valve body 31, that is, the inner surface of the valve insertion portion. As a result, it is possible to satisfactorily maintain the state of being pressed against the valve body 31, and it is possible to satisfactorily suppress wear on the inner surface of the valve body 31, that is, the valve insertion portion due to the pulsation of the line pressure.

  As described above, in the power transmission device 20 including the hydraulic control device 30 described above, the first and second bolts V1 and V2 can be tightened with the first and second bolts V1 and V2, even if a general right-hand screw type is used. The direction of the pressing force acting on the solenoid valves S1 and S2 and the force around the axis of the bolts V1 and V2 applied to the first and second solenoid valves S1 and S2 by the action of the input pressure can be matched. . Therefore, even if pulsation occurs in the line pressure that is the input pressure of the first and second solenoid valves S1 and S2, the state in which the first and second solenoid valves S1 and S2 are pressed against the valve body 31 is maintained well. Therefore, the wear of the valve body 31 due to the pulsation of the line pressure can be satisfactorily suppressed.

  Further, in the power transmission device 20, even before the hydraulic control device 30 is fixed to the transmission case 22, if the second solenoid valve S2 is fixed to the valve body 31 by the bolt V2, the first solenoid valve S1. Is likely to be detached from the valve body 31, the projecting portion 125 comes into contact with the retaining portion 215 of the second solenoid valve S 2, so that the first solenoid valve S 1 can be prevented from being detached from the valve body 31. Therefore, in the power transmission device 20, the wear of the valve body 31 due to the pulsation of the input pressures of the first and second solenoid valves S1 and S2 is suppressed, and the first solenoid fixed to the transmission case 22 together with the valve body 31. It is possible to prevent the valve S1 from being detached from the valve body 31 before fixing the hydraulic control device 30 to the transmission case 22.

  Needless to say, the mounting structure of the first and second solenoid valves S1 and S2 described above may be applied to solenoid valves other than the first and second solenoid valves S1 and S2. In other words, the mounting structure described above is disposed in the vicinity of a solenoid valve that is susceptible to the pulsation of the discharge pressure of the oil pump 24, that is, a primary regulator valve that generates a line pressure as an input pressure (with the regulator valve). It is extremely useful when applied to two solenoid valves). Further, as in the above-described embodiment, the entire second solenoid valve S2 is made compact by integrating the retaining portion 215 with the second bracket 210 for fixing the second solenoid valve S2 to the valve body 31. However, the second bracket 210 and the retaining portion 215 may be separated.

  Here, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problems will be described. That is, in the above embodiment, the transmission 25, the transmission case 22 that accommodates the transmission 25, the valve body 31 fixed to the transmission case 22, the valve body 31, and the line pressure are adjusted. A power transmission device including first and second solenoid valves S1 and S2 for outputting, and a hydraulic control device 30 that adjusts hydraulic oil from the oil pump 24 to generate hydraulic pressure for operating the transmission 25 and the like. Reference numeral 20 corresponds to a “power transmission device”, and a first bracket 110 located on the left side in the assembly direction of the first solenoid valve S1 and fixed to the transmission case 22 together with the valve body 31 by a bolt V1 is a “first bracket”. The protrusion 125 that protrudes to the right in the assembly direction corresponds to a “protrusion”. The second bracket 210 located on the left side in the assembly direction of the second solenoid valve S2 and fixed to the valve body 31 by the bolt V2 corresponds to the “second bracket” and located on the left side in the assembly direction. The retaining portion 215 that can come into contact with the protruding portion 125 so as not to separate the first solenoid valve S1 from the valve body 31 corresponds to a “preventing portion”.

  However, the correspondence between the main elements of the embodiment and the main elements of the invention described in the column of means for solving the problem is the invention described in the column of means for solving the problem by the embodiment. Therefore, the elements of the invention described in the column of means for solving the problems are not limited. In other words, the examples are merely specific examples of the invention described in the column of means for solving the problem, and the interpretation of the invention described in the column of means for solving the problem is It should be done based on the description.

  As mentioned above, although the embodiment of the present invention has been described using examples, the present invention is not limited to the above-described examples, and various modifications can be made without departing from the scope of the present invention. Needless to say.

  The present invention can be used in the manufacturing industry of power transmission devices and hydraulic control devices included therein.

  10 automobiles, 12 engines, 14 electronic control units for engines (engine ECUs), 16 electronic control units for brakes (brake ECUs), 20 power transmission devices, 21 electronic control units for transmissions (transmission ECUs), 22 transmission cases, 23 torques Converter, 24 oil pump, 25 transmission, 26 gear mechanism, 27 differential mechanism, 30 hydraulic control device, 31 valve body, 32 center plate, 32a hole, 91 accelerator pedal, 92 accelerator pedal position sensor, 93 brake pedal, 94 master cylinder pressure sensor, 95 shift lever, 96 shift range sensor, 99 vehicle speed sensor, 100, 200 solenoid case, 101, 201 connector, 110 first bracket, 111, 211 fixing part, 1 2, 212 Fastening part, 112a, 212a Bolt hole, 120 Stopper member, 121 Fixing part, 125 Protruding part, 210 Second bracket, 215 Stopping part, 216 Claw part, 311 First half part, 311a, 312a Bolt hole, 311b Bolt fastening portion, 311c screw hole, 312 second half, 312s surface, S1 first solenoid valve, S2 second solenoid valve, V1, V2 bolts.

Claims (5)

In a power transmission device comprising: a transmission; a hydraulic control device that generates hydraulic pressure for adjusting hydraulic oil from an oil pump to operate the transmission; and a transmission case that houses the transmission.
The hydraulic control device includes a valve body that is fixed to the transmission case, and a first solenoid valve and a second solenoid valve that are assembled to the valve body and that regulate and output an input pressure,
The valve body has a bolt hole through which the first bolt is inserted, and is fixed to the transmission case by screwing the first bolt penetrating the bolt hole into the transmission case.
The first solenoid valve is located on the left side in the assembly direction of the first solenoid valve with respect to the valve body, and is fixed to the transmission case together with the valve body by the first bolt, and the assembly Having a protruding portion protruding to the right side of the direction,
The second solenoid valve is positioned on the left side in the assembly direction of the second solenoid valve with respect to the valve body, and is positioned on the left side in the assembly direction with a second bracket fixed to the valve body by a second bolt. And a retaining portion that can come into contact with the protruding portion so as not to separate the first solenoid valve from the valve body.   The power transmission device according to claim 1, wherein the second bracket includes the retaining portion. The power transmission device according to claim 2,
The second bracket includes a fastening portion having a bolt hole through which the second bolt is inserted, and the retaining portion extends from the fastening portion toward the surface of the valve body,
The projecting portion is formed between the surface of the valve body and the fastening portion of the second bracket without contacting the retaining portion when the first and second solenoid valves are assembled to the valve body. A power transmission device characterized by being positioned. In the power transmission device according to any one of claims 1 to 3,
When the first solenoid valve is assembled to the valve body, the protruding portion extends toward the surface so as not to contact the surface of the valve body. The power transmission device according to claim 4,
The retaining portion can be brought into contact with the protrusion when the tip of the protrusion comes into contact with the surface of the valve body as the valve body rotates about the axis of the first solenoid valve. It is comprised so that it may become. The power transmission device characterized by the above-mentioned.

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