JP4916419B2 - Hydraulic control device for automatic transmission - Google Patents

Description

  The present invention relates to a hydraulic control device for an automatic transmission, and more specifically, in an automatic transmission in which a wiring of electronic components is arranged from a position higher than a valve body to a position lower than the valve body in a case of the automatic transmission. The present invention relates to a hydraulic control device.

  Conventionally, in an automatic transmission case, the wiring of an electronic component installed at a position higher than the valve body may be connected to a connector provided at a position lower than the valve body (see, for example, Patent Document 1). ). In this case, the wiring of the electronic component is passed through a slight gap between the valve body and the transmission case.

  As shown in FIG. 5 (d), in the conventional electronic component wiring structure, an electronic component (rotational speed sensor) that detects the rotational speed of the clutch drum 5 of the automatic transmission is provided above the valve body 26 in the transmission case 3. ) 7 is fixed. The wiring 7B of the electronic component 7 is disposed in a slight gap between the side portion of the valve body 26 and the transmission case 3, and is connected to a connector 8 provided at a position lower than the valve body 26 of the transmission case 3. Yes.

  A procedure for assembling the valve body 26 in the transmission case 3 will be described with reference to FIGS.

  As shown in FIG. 5A, first, the valve body 26 in which the electronic component 7 is previously installed at the upper portion is inserted upward from the lower opening 3 a of the transmission case 3. At this time, the wiring 7B of the electronic component 7 is in an unconnected state, and the wiring 7B hangs down to the lower side of the valve body 26 along the upper and side portions of the valve body 26. The linear solenoid 11 is attached to the lower valve body 26B constituting the lower portion of the valve body 26, and the wiring of the linear solenoid 11 is also not connected.

  Next, as shown in FIGS. 5A and 5B, the valve body 26 is lifted to a predetermined position in the transmission case 3 and is fixed in the transmission case 3 with a bolt or the like (not shown). At this time, an intermediate portion of the wiring 7B of the electronic component 7 is disposed in a gap between the side portion of the valve body 26 and the transmission case 3.

  Next, as shown in FIG. 5C, the wiring 7 </ b> B of the electronic component 7 exposed to the lower side of the valve body 26 and the wiring 11 </ b> A of the linear solenoid 11 are connected to the same connector 8.

Finally, as shown in FIG. 5 (d), the lower opening 3 a of the transmission case 3 is closed by the oil pan 4, and the oil pan 4 is fixed to the transmission case 3 by a bolt (not shown).
JP 11-336880 A

  However, when the valve body 26 is inserted into the transmission case 3 and assembled, the wiring 7B of the electronic component 7 may be damaged. That is, since the gap between the valve body 26 and the transmission case 3 is often set narrow, the valve body 26 is placed in the transmission case 3 as shown by a two-dot chain line in FIG. When the valve body 26 is slightly displaced from the original insertion position in the horizontal direction with respect to the lower opening 3a of the transmission case 3 when inserted and assembled, the wiring 7B that hangs down from the upper part of the valve body 26 along the side portion. May be pinched between the valve body 26 and the transmission case 3 and may be damaged.

  Further, since the gap between the valve body 26 and the transmission case 3 is narrow, after the vehicle is shipped from the factory, the wiring 7B is swung due to traveling vibration of the vehicle and the like inside the valve body 26 and the transmission case 3 (not shown). There is also a risk of abrasion damage due to repeated rubbing against the uneven portions.

  If the gap between the valve body 26 and the transmission case 3 is set large in order to solve the above problem, the possibility of the wiring 7B being pinched and damaged when the valve body 26 is assembled is reduced, but the wiring 7B The risk of wear damage due to rocking is still unresolved. If the gap is set large, the transmission case is increased in size and weight, which is not preferable.

  As shown in FIG. 6, if the intermediate position of the wiring 7B of the electronic component 7 is covered with a hollow tower-shaped protective component 27, damage due to pinching when the valve body 26 is assembled or wiring 7B after the valve body 26 is assembled. It is possible to prevent wear damage due to the swinging of the. However, providing the protective component 27 is not preferable because it increases the number of components and increases costs.

  In addition, it is conceivable to provide a means for fastening the intermediate position of the wiring 7B of the electronic component 7 to the valve body 26 with a clamp or the like. However, there arises a new problem that extra time must be spent on the fastening work.

  The present invention was devised in view of the above problems, and in an automatic transmission case, the wiring of electronic components is arranged from a position higher than the valve body to a position lower than the valve body in the case of the automatic transmission. In the hydraulic control device, the gap between the side of the valve body and the case of the automatic transmission is not enlarged, and the number of parts and the number of work steps are not significantly increased. It is an object of the present invention to provide a hydraulic control device for an automatic transmission that prevents damage.

As means for solving the above-described problems, a hydraulic control device for an automatic transmission according to the present invention is configured as follows. That is, the hydraulic control device for an automatic transmission according to the present invention includes a valve body installed in a case of the automatic transmission, a connection unit installed in the case of the automatic transmission at a position lower than the valve body, In the hydraulic control device for an automatic transmission provided with a wiring for an electronic component connected to the connection portion, a through-hole penetrating from the upper part to the lower part of the valve body is formed in the valve body. Is inserted into the through-hole from above the valve body, is escaped from below the valve body, and is connected to the connecting portion. The electronic component is provided on the upper portion of the valve body. In addition, the position lower than the valve body in which the connection part is installed means a position lower than a part excluding the lower protrusion part when the lower protrusion part is provided on the bottom part of the valve body.

  According to the hydraulic control device for an automatic transmission having such a configuration, since the wiring of the electronic parts is passed through the through hole in the valve body, when the valve body is inserted into the case of the automatic transmission and assembled. In addition, the wiring of the electronic parts is prevented from being damaged by being pinched between the case of the automatic transmission and the valve body. Further, since the swing of the wiring of the electronic component due to running vibration or the like is suppressed, the wear damage of the wiring is also prevented. In addition, these advantages can be obtained without causing an increase in the gap between the valve body and the case of the automatic transmission, an increase in the number of parts, and a significant increase in work man-hours.

  The through hole may be a return hole for hydraulic oil of the automatic transmission.

  According to the hydraulic control device for an automatic transmission having such a configuration, it is not necessary to provide a through hole only for the wiring of the electronic components, so that the number of processing steps of the valve body can be reduced.

  According to the hydraulic control device for an automatic transmission according to the present invention, when the valve body is inserted and assembled in the case of the automatic transmission, the wiring of the electronic parts is sandwiched between the case of the automatic transmission and the valve body. To prevent damage. Further, since the swing of the wiring of the electronic component due to running vibration or the like is suppressed, the wear damage of the wiring is also prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a hydraulic control device 1 (hereinafter also simply referred to as “hydraulic control device 1”) for an automatic transmission of a vehicle such as an automobile.

  The case 2 of the automatic transmission includes a transmission case 3 in which a lower opening 3a is formed, and an oil pan 4 attached to the transmission case 3 so as to close the lower opening 3a.

  The transmission case 3 is configured with gears, shafts, bearings, and the like (not shown), and a gear train (not shown) for shifting the power output from the engine and outputting it to the drive shaft side is accommodated. Reference numeral 5 denotes a clutch drum of an automatic transmission that is a part of the gear train.

  The oil pan 4 is formed in a saucer shape in order to store a predetermined amount of hydraulic oil sealed in the case 2 of the automatic transmission. The hydraulic oil is called ATF (Automatic Transmission Fluid) and is used as a lubricating oil to actuate a clutch for shifting gears, transmit torque converter force, and prevent seizure between mechanical elements such as gears. Or function.

  The hydraulic control device 1 for the automatic transmission is placed in the transmission case 3 of the automatic transmission case 2 at a position lower than the case 2 of the automatic transmission, the electronic component 7 installed at a position higher than the valve body 6, and the valve body 6. A connector 8 or the like as an installed connection portion is provided. The connector 8 is positioned lower than the valve body 6 so that when the valve body 6 is fixed in the transmission case 3, an operator can easily put a hand through the lower opening 3 a of the transmission case 3 and perform wiring work. Is provided.

  The electronic component 7 is, for example, a rotational speed sensor that detects the rotational speed of the clutch drum 5 constituting the gear train. The electronic component 7 may be other than the one that detects the rotation speed. Further, when the electronic component 7 is a rotation speed sensor, the detection target may be a rotating body other than the clutch drum 5. The electronic component 7 as a rotational speed sensor shown in the figure is fixed to the upper portion of the valve body 6 with the detection side directed to the outer diameter portion of the clutch drum 5.

  The connector 8 is electrically connected to an ECU (Electronic Control Unit) 10 installed outside the case 2 from the inside of the case 2 (transmission case 3) of the automatic transmission. The connector 8 is fixed to the case 2 (transmission case 3) of the automatic transmission.

  The valve body 6 constitutes a valve unit for hydraulic control of the automatic transmission. In the present embodiment, the valve body 6 includes an upper valve body 6A, a lower valve body 6B, and a valve plate 6C that extends between the valve body 6A and the valve body 6C. Each valve body 6A, 6B is formed with a hydraulic line for controlling the hydraulic pressure of the automatic transmission. The valve body 6 is installed at a position below the gear train in the transmission case 3 and away from the oil pan 4. Valves having wiring such as a linear solenoid 11 are fixed to the lower valve body 6B.

  The valve body 6 includes a cylindrical valve hole that houses the linear solenoid 11 and the like, a communication path that communicates the ports of each valve, a drain hole that communicates the valve hole and the outside, and from the upper part to the lower part of the valve body 6. A through hole 6X and the like penetrating therethrough are formed.

  The through hole 6X is preferably provided at a position avoiding the hydraulic line. Alternatively, a return hole for hydraulic oil (automatic transmission hydraulic oil) penetrating from the upper part to the lower part of the valve body 6 may be used as the through hole 6X.

  The wiring 7A of the electronic component 7 is inserted from above the valve body 6 into the through hole 6X, escapes from below the valve body 6, is connected to the connector 8, and is electrically connected to the ECU 10 via the connector 8. The output of the electronic component 7 is input to the ECU 10 connected via the connector 8. The through hole 6X is not limited to a straight hole as shown in FIG. 1 as long as the wiring 7A of the electronic component 7 can be inserted until it reaches the lower part of the valve body 6. For example, as shown in FIG. 2, it may be a through-hole 6Z that penetrates the valve body 6 while bending from the upper part to the lower part of the valve body 6.

  The linear solenoids 11,... Housed in the valve body 6 are also connected to the connector 8. A control signal from the ECU 10 is input to the linear solenoids 11 connected through the connector 8.

  Hereinafter, a procedure for assembling the valve body 6, the wiring 7A, the wiring 11A and the like in the hydraulic control apparatus 1 for the automatic transmission will be described with reference to FIG.

  First, as shown in FIG. 3A, prior to inserting the valve body 6 into the transmission case 3, the electronic component 7 is fixed at a predetermined position above the valve body 6, and the lower valve body 6B is attached to the lower valve body 6B. The linear solenoids 11, 11,. Then, the wiring 7 </ b> A of the electronic component 7 is inserted through the through hole 6 </ b> X from above the valve body 6 until the tip end is escaped from below the valve body 6. At this time, the tips of the wiring 11A,... Of the electronic component 7 and the linear solenoids 11,.

  Next, as shown in FIGS. 3A to 3B, the valve body 6 is inserted upward from the lower opening 3 a of the transmission case 3. At this time, the wiring 7 </ b> A of the electronic component 7 is inserted between the through holes 6 </ b> X in the valve body 6, so that it is not sandwiched between the transmission case 3 and the valve body 6. Thus, when the valve body 6 is inserted into the transmission case 3 and assembled, the wiring 7A of the electronic component 7 is not affected even if the valve body 6 is displaced from the original insertion position in the horizontal direction with respect to the lower opening 3a of the transmission case 3. Is sandwiched between the transmission case 3 and the valve body 6 and is not damaged. The valve body 6 is inserted to a fixed position in the transmission case 3 and then fixed in the transmission case 3 by a fixing tool such as a bolt (not shown).

  Next, as shown in FIG. 3C, the wiring 7 </ b> A of the electronic component 7 and the wiring 11 </ b> A of the linear solenoid 11 inserted through the through hole 6 </ b> X and escaped from the lower side of the valve body 6 are connected to the connector 8.

  Finally, as shown in FIG. 3 (d), the lower opening 3 a of the transmission case 3 is closed by the oil pan 4, and the oil pan 4 is fixed to the transmission case 3 by a bolt (not shown).

<Other embodiments>
In the embodiment of the present invention described above, the case where the electronic component 7 is fixed to the upper portion of the valve body 6 has been described as an example. However, the electronic component 7 is fixed to the upper portion of the valve body 6. It is not limited to what was done, You may install in the position away from the valve body 6 upwards. For example, as shown in FIG. 4, the electronic component 7 may be installed on the upper side of the clutch drum 5. Also in this case, the wiring 7A of the electronic component 7 is inserted through the through hole 6X in advance, so that the wiring 7A of the electronic component 7 is connected to the transmission case 3 when the valve body 6 is inserted into the transmission case 3 and assembled. It is possible to prevent damage between the valve body 6 and the valve body 6.

  The present invention is applicable to a hydraulic control device for an automatic transmission in which the wiring of electronic components is arranged from a position higher than the valve body to a position lower than the valve body in the case of the automatic transmission.

1 is a partial cross-sectional view showing a hydraulic control device and the like of an automatic transmission according to an embodiment of the present invention, and showing an embodiment in which a straight through hole is formed in a valve body. It is a fragmentary sectional view showing a hydraulic control device of an automatic transmission concerning an embodiment of the invention, and is a figure showing an embodiment by which a bent through hole is formed in a valve body. It is the figure which showed the procedure at the time of attaching a valve body to the case of an automatic transmission. It is sectional drawing of the case of the automatic transmission which showed the hydraulic control apparatus etc. of the automatic transmission which concern on other embodiment of this invention. It is the figure which showed the procedure at the time of attaching the conventional valve body to the case of an automatic transmission. It is the fragmentary sectional view which showed the example of a trial which covered the middle position of the wiring of an electronic component with the protection component of the hollow tower shape.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hydraulic control apparatus of automatic transmission 2 Case of automatic transmission 6 Valve body 7 Electronic component 7A Wiring of electronic component 8 Connector (connection part)
6X, 6Z through hole

Claims (2)

A valve body that is installed in a case of an automatic transmission and has a through-hole formed from the upper part to the lower part thereof;
A connection part installed in the case of the automatic transmission at a position lower than the valve body;
Wherein is inserted from above the valve body in the through hole, wherein was is escaping from the lower valve body and connected to the connecting portion, and a electronic component interconnection,
A hydraulic control device for an automatic transmission , wherein the electronic component is provided on an upper portion of the valve body . The hydraulic control device for an automatic transmission according to claim 1,
The hydraulic control device for an automatic transmission, wherein the through hole is a return hole for hydraulic oil of the automatic transmission.

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