JP2019065885A - Sensor holding structure for transmission and wiring processing structure - Google Patents

Abstract

To provide a sensor holding structure for a transmission that can hold a sensor in an oil pan without installing other components such as holding part, and to provide a wiring processing structure for a transmission that can preferably process an extra length of wiring that is routed in an oil pan.SOLUTION: A sensor holding part 21 is installed integrally with a strainer 4 in an outer periphery of the strainer 4. The sensor holding part 21 holds an oil temperature sensor 24. Multiple wiring locking parts 31 are installed integrally with the strainer 4 in the outer periphery of the strainer 4. Wiring 33 extending from the oil temperature sensor 24 is locked by the wiring locking parts 31 at the middle part thereof.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a sensor holding structure and a wiring processing structure in a transmission.

  In an automatic transmission mounted on a vehicle, an oil pan for storing oil is attached to the bottom of a transmission case forming an outer shell thereof. Then, the oil stored in the oil pan is drawn up through the strainer by the oil pump, and is supplied as hydraulic oil or lubricating oil to each part requiring oil supply through the valve body forming the hydraulic circuit.

  An oil temperature sensor is immersed in the oil in the oil pan to detect the temperature of the oil. Since the viscosity of oil changes with temperature, the control device that controls the hydraulic pressure supplied to each part of the automatic transmission is based on the temperature of the oil detected by the temperature sensor, the solenoid valve etc. included in the hydraulic circuit By controlling, each part of the automatic transmission can be operated satisfactorily.

JP, 2017-67161, A

  The oil temperature sensor is fixed to the valve body. Since the oil temperature sensor is a resin molded product, if it is tightened to the valve body with a bolt as it is, the resin portion is broken. Therefore, it is necessary to take measures such as holding the oil temperature sensor by a holding part made of sheet metal and fastening the holding part to the valve body with a bolt. However, in the case of providing the holding parts, the increase in the number of parts leads to an increase in the number of operation steps in assembling the sensor and an increase in the cost of the automatic transmission.

  In addition, it is necessary to devise handling of extra length such as wiring extending from the oil temperature sensor.

  An object of the present invention is to provide a sensor holding structure in a transmission that can hold a sensor in an oil pan without providing a separate part such as a holding part.

  Another object of the present invention is to provide a wiring processing structure in a transmission which can satisfactorily process the remaining length of the wiring arranged in the oil pan.

  In order to achieve the above object, a sensor holding structure in a transmission according to one aspect of the present invention is a sensor holding structure in a transmission provided with an oil pan so as to accommodate a strainer attached to a valve body. The strainer is characterized in that a sensor holding portion for holding the sensor is integrally provided.

  According to this configuration, since the sensor holding portion is integrally provided on the strainer, the sensor holding portion can hold the sensor in the oil pan without providing a separate component such as the holding member. Therefore, the number of parts can be reduced as compared with the conventional case. And with the reduction of the number of parts, the operation man-hour at the time of assembling | attaching a sensor can be reduced, and the cost of a transmission can be reduced.

  In order to achieve the above-mentioned other object, the wiring processing structure in a transmission according to another aspect of the present invention is a transmission wherein an oil pan is provided to accommodate a strainer attached to a valve body. In the wiring processing structure for processing the wiring to be laid, the strainer is integrally provided with a wiring stopping portion for stopping the wiring.

  According to this configuration, since the wire stopper is integrally provided in the strainer, the wire can be routed along the strainer by stopping the wire at the wire stopper. Therefore, even if the wiring has a surplus length, the surplus length can be processed well.

  According to the present invention, the sensor can be held in the oil pan without providing a separate part, the number of parts can be reduced as compared with the conventional case, and the number of sensor assembling work and the cost of the transmission can be reduced. Moreover, even if the wiring to be routed in the oil pan has an extra length, the extra length can be processed well.

It is a bottom view of the automatic transmission concerning one embodiment of the present invention, and shows the state where an oil pan was removed. It is a perspective view of a strainer. It is a perspective view of a strainer, and is a perspective view seen from a different angle from FIG. It is sectional drawing which shows a part of strainer.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings.

<Automatic transmission>
FIG. 1 is a bottom view of an automatic transmission 1 according to an embodiment of the present invention, showing a state in which an oil pan is removed.

  The automatic transmission 1 may be a stepped automatic transmission (AT: Automatic Transmission) or a continuously variable transmission (CVT). In addition, the automatic transmission 1 may be a power split type continuously variable transmission. A power split type continuously variable transmission includes, for example, a belt type continuously variable transmission mechanism that continuously changes the power by changing the gear ratio, and splits the power into two paths between the input shaft and the output shaft. Transmission that can be transmitted.

  The automatic transmission 1 includes a transmission case 2. At the bottom of the transmission case 2, a valve body 3 is provided. The valve body 3 is formed with a hydraulic circuit including various valves for controlling the supply of hydraulic pressure (hydraulic oil or lubricating oil) to each part of the automatic transmission 1. A strainer 4 is attached to the valve body 3 from the lower side. An oil pan (not shown) for storing oil is fixed to the transmission case 2 from the lower side with a plurality of bolts. The strainer 4 is accommodated in the oil pan and immersed in the oil stored in the oil pan.

<Strainer>
2 and 3 are perspective views of the strainer 4. FIG. 4 is a cross-sectional view showing part of the strainer 4.

  The strainer 4 includes an upper case 11 made of synthetic resin, and a lower case 12 made of synthetic resin overlapping the upper case 11 from the lower side. Between the upper case 11 and the lower case 12, as shown in FIG. 4, for example, the filtration material 13 made of non-woven fabric is sandwiched between the outer peripheral portion of the upper case 11 and the outer peripheral portion of the lower case 12. It is held.

  As shown in FIGS. 2 and 3, the upper case 11 is formed with a communication port 14 communicating with the suction port of the oil pump. On the other hand, the lower case 12 is formed with an intake port 15 for taking in the oil stored in the oil pan into the strainer 4.

  When the oil pump is driven, the oil in the oil pan is taken into the strainer 4 from the intake port 15. The oil taken into the strainer 4 is filtered to remove foreign matter by passing through the filter medium 13 and sucked into the oil pump through the communication port 14.

  A sensor holding portion 21 is provided on the outer peripheral portion of the strainer 4. The sensor holding portion 21 includes an upper holding portion 22 integrally formed with the upper case 11 and a lower holding portion 23 integrally formed with the lower case 12. The upper holding portion 22 has a width in a direction along the outer peripheral edge of the upper case 11, extends laterally from the outer peripheral edge of the upper case 11, and is curved in an arc shape so as to bulge upward. The lower holding portion 23 is opposed to the upper holding portion 22 from the lower side. The lower holding portion 23 has a width in a direction along the outer peripheral edge of the lower case 12, extends laterally from the outer peripheral edge of the lower case 12, and is curved in an arc shape so as to bulge downward.

  As shown in FIG. 1 and FIG. 4, the oil temperature sensor 24 is held by the sensor holding unit 21. The oil temperature sensor 24 is a resin molded product, and has a substantially cylindrical outer shape. The oil temperature sensor 24 elastically deforms the upper holding portion 22 and the lower holding portion 23 so that the distance between the front ends of the upper holding portion 22 and the lower holding portion 23 of the sensor holding portion 21 is expanded. It is pushed while being let. Then, when the oil temperature sensor 24 is pushed to the curved portions of the upper holding portion 22 and the lower holding portion 23, the upper holding portion 22 and the lower holding portion 23 are restored, and each of the upper holding portion 22 and the lower holding portion 23 The curved portion holds the oil temperature sensor 24 so as to be wrapped.

  Further, a stopper 25 is provided on the outer peripheral portion of the strainer 4 at an interval from the sensor holding portion 21. The stopper 25 has a plate shape having a width in the vertical direction, and extends laterally from the outer peripheral edge of the lower case 12. As shown in FIG. 1, when the oil temperature sensor 24 held by the sensor holding unit 21 abuts on the stopper 25, it is possible to suppress the oil temperature sensor 24 from coming off the sensor holding unit 21 and dropping off.

  Furthermore, as shown in FIG. 2 and FIG. 3, a plurality of wiring stoppers 31 are provided on the outer peripheral portion of the strainer 4 at intervals in the direction along the outer periphery of the strainer 4. The wire stopper 31 is integrally formed with the upper case 11, has a plate shape having a width in a direction along the outer peripheral edge of the upper case 11, and extends laterally from the outer peripheral edge of the upper case 11. A circular insertion hole 32 is formed through the wiring stopper 31 in the thickness direction.

  The middle portion of the wire 33 extending from the oil temperature sensor 24 is bound by a plurality of binding tools 34. An insertion pin (not shown) is formed in the binding tool 34, and the insertion pin is inserted from the upper side into the insertion hole 32 of the wiring stopping portion 31 so that the middle portion of the wiring 33 is the wiring stopping portion 31. Stop. Thus, the wires 33 are routed along the outer periphery of the strainer 4. Therefore, even if the wiring 33 has an extra length to facilitate the wiring operation, it is possible to suppress the wiring 33 from being slackened. Therefore, when the oil pan is attached to the transmission case 2, the wire 33 can be prevented from being pinched between the outer periphery of the oil pan and the outer periphery of the transmission case 2.

  In addition, when the wiring 33 has an extra length, when the operation check of the valve body 3 is performed, the wiring 33 can be easily arranged, and the operation check operation can be performed easily.

<Function effect>
As described above, since the sensor holding portion 21 is integrally provided in the strainer 4, the oil temperature sensor 24 is held in the oil pan by the sensor holding portion 21 without providing a separate component such as a holding member. Can. Therefore, the number of parts can be reduced as compared with the conventional case. Then, as the number of parts is reduced, the number of operation steps when assembling the oil temperature sensor 24 can be reduced, and the cost of the automatic transmission 1 can be reduced.

  Moreover, the oil temperature sensor 24 is disposed near the intake port 15 of the strainer 4 by the oil temperature sensor 24 being held by the sensor holding portion 21. Therefore, the oil temperature of the oil taken into the strainer 4 from the intake port 15 can be detected by the oil temperature sensor 24. As a result, since the oil temperature of the oil supplied from the oil pump to the valve body 3 can be accurately detected, the hydraulic pressure supplied to each part of the automatic transmission 1 is controlled by the control of the solenoid valve based on the oil temperature. It is possible to adjust pressure accurately.

  Furthermore, there is also an advantage that the mounting position of the oil temperature sensor 24 does not depend on the shape of the valve body 3.

  Further, since the wire stopper 31 is integrally provided in the strainer 4, the wire 33 can be routed along the outer periphery of the strainer 4 by fixing the wire 33 to the wire stopper 31. Therefore, even if the wiring 33 has an extra length, the extra length can be processed well.

<Modification>
As mentioned above, although one Embodiment of this invention was described, this invention can also be implemented with another form.

  For example, although the wiring stopper 31 is integrally formed with the upper case 11, the wiring stopper 31 may be integrally formed with the lower case 12.

  Further, the present invention is not limited to the automatic transmission 1 but can be applied to a manual transmission (MT: Manual Transmission).

  In addition, various design changes can be made to the above-described configuration within the scope of the matters described in the claims.

1: Automatic transmission (transmission)
3: Valve body 4: Strainer 21: Sensor holding part 24: Oil temperature sensor (sensor)
31: Wiring stopper 33: Wiring

Claims (2)

A sensor holding structure in a transmission, wherein an oil pan is provided to accommodate a strainer attached to a valve body,
A sensor holding structure in which a sensor holding unit for holding a sensor is integrally provided on the strainer. A transmission, in which an oil pan is provided to accommodate a strainer attached to a valve body, wherein the wiring processing structure processes a wire arranged in the oil pan,
A wire processing structure, wherein a wire stopping portion for stopping the wire is integrally provided in the strainer.

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