JP2015190891A - Automatic transmission testing method and automatic transmission test device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the avoidance of sliding between a torque converter housing and a mission housing and the generation of chips at a time of testing an automatic transmission.SOLUTION: An automatic transmission testing method according to the present invention sequentially executes steps of: connecting a tester drive plate 211 to a torque converter housing H1 so as to be able to transmit a torque; supplying air into the torque converter housing H1 to increase an internal pressure of the torque converter housing H1, thereby separating the torque converter housing H1 from the mission housing H2; and testing an automatic transmission 20 while rotating the tester drive plate 211 to drive the torque converter housing H1 to rotate.

Description

  The present invention relates to a test method and a test apparatus for an automatic transmission.

  In the automatic transmission (AT or CVT), after the torque converter is assembled, the torque converter housing (hereinafter referred to as torque converter housing) is rotated by the motor, and the output torque value, the hydraulic path, and the like are inspected. For example, Patent Document 1 discloses a test apparatus for performing the above inspection on an automatic transmission.

  FIG. 4 shows an example of the configuration of a conventional automatic transmission test apparatus. The test apparatus 300 includes a tester drive plate 310, a motor 320 that rotationally drives the tester drive plate 310, and a slide mechanism (not shown) that slides the tester drive plate 310. The tester drive plate 310 is provided with positioning holes 311 at the shaft center and torque transmission holes 312 at a plurality of locations in the circumferential direction of the outer peripheral portion. On the end surface of the torque converter housing H1 on the engine side (right side in the figure), a protruding portion 32 protruding from the shaft center toward the engine side is provided, and a locating pin 330 is mounted on the outer peripheral portion.

  The tester drive plate 310 of the test apparatus 300 is advanced to the automatic transmission 20 side (left side in the figure) by the slide mechanism, and the protruding portion 32 of the torque converter housing H1 is fitted into the positioning hole 311 of the tester drive plate 310. The locate pin 330 mounted on the torque converter housing H1 is inserted into the torque transmission hole 312 of the drive plate 310 (see the dotted line in FIG. 4). Then, by rotating the tester drive plate 310 by the motor 320, the torque converter housing H1 is rotationally driven, and various inspections of the automatic transmission 20 are performed in this state.

JP-A-7-128190

  When testing the automatic transmission with the above-described test apparatus, the torque converter housing H <b> 1 is not normally fixed in the axial direction with respect to the automatic transmission 20. Therefore, when the tester drive plate 310 is advanced and fitted to the protrusion 32 or the locating pin 330 of the torque converter housing H1, the tester drive plate 310 pushes the torque converter housing H1 to the mission side (left side in the figure), and the torque converter housing H1. May abut against a housing (hereinafter referred to as a mission housing) H2 of the automatic transmission 20. If the torque converter housing H1 is rotated in this state, the torque converter housing H1 slides with the mission housing H2, and chips may be generated.

  In view of the above circumstances, the technical problem to be solved by the present invention is to avoid sliding between the torque converter housing and the mission housing and to surely prevent the generation of chips when testing an automatic transmission. is there.

  In order to solve the above-mentioned problems, the present invention is a method for testing an automatic transmission in which a torque converter is assembled, and includes a step of coupling a tester drive plate to a torque converter housing to transmit torque. The step of separating the torque converter housing from the automatic transmission housing by supplying a fluid to the inside of the torque converter housing to increase the internal pressure, and rotating the tester drive plate to rotationally drive the torque converter housing. However, a test method for an automatic transmission is provided that sequentially goes through the steps of testing the automatic transmission.

  As described above, the automatic transmission and the torque converter are assembled in a state where relative axial movement is permitted. Therefore, by supplying a fluid to the inside of the torque converter housing and increasing the internal pressure, the torque converter housing can be moved to the side away from the transmission housing. In this state, the torque converter housing is rotationally driven by the tester drive plate, so that sliding between the torque converter housing and the transmission housing can be reliably avoided.

  The automatic transmission is provided with a hydraulic path communicating with the interior of the torque converter housing. If air is supplied into the torque converter housing using this hydraulic pressure path, the internal pressure of the torque converter housing can be increased with a simple mechanism. Specifically, the internal pressure of the torque converter housing can be increased by supplying air as the fluid to the hydraulic path before supplying oil to the hydraulic path provided in the automatic transmission.

  The test method as described above is a device for testing an automatic transmission in which a torque converter is assembled, and supplies oil to a drive device that rotationally drives a torque converter housing and a hydraulic path inside the automatic transmission. An automatic transmission testing device that increases the internal pressure of the torque converter housing by supplying air from the air supply unit to the hydraulic path. Can be used.

  When supplying air to the inside of the torque converter housing as described above, if the air supplied to the interior of the torque converter housing escapes to the outside, the internal pressure of the torque converter housing becomes difficult to increase. There is a risk of not being able to. Therefore, it is preferable to supply air in a direction in which a lockup clutch provided in the torque converter is brought into contact with the torque converter housing. As described above, the lock-up clutch and the torque converter housing are in contact with each other, so that the hydraulic path in the torque converter housing is almost closed by the contact portion. As a result, air does not easily escape to the outside of the torque converter housing, and the internal pressure of the torque converter housing is likely to increase, so that the torque converter housing can be reliably separated from the transmission housing.

  As described above, according to the automatic transmission testing method of the present invention, it is possible to avoid sliding between the torque converter housing and the transmission housing and to reliably prevent generation of chips.

1 is a side view of an automatic transmission testing apparatus according to an embodiment of the present invention. It is sectional drawing of a torque converter periphery. It is a front view of the tester drive plate of the said test apparatus. It is a side view of the testing apparatus of the conventional automatic transmission.

  FIG. 1 shows an automatic transmission test apparatus 200 according to an embodiment of the present invention. A torque converter 10 is assembled in the automatic transmission 20. In the following description, in the direction of the rotation axis of the torque converter 10 shown in FIG. 1 (in the direction of the axis L1), the automatic transmission 20 side (left side in the figure) is the transmission side and the opposite side (FIG. The middle right) is called the engine side.

  FIG. 2 is a cross-sectional view around the torque converter 10. The torque converter 10 includes a front cover 3, a pump impeller 5, a turbine 6, a stator 7, a lock-up clutch 8, and the like.

  The front cover 3 is connected via a drive plate (not shown) provided on the output shaft of the engine, and rotates integrally with the output shaft. The front cover 3 includes a disk part 31, a projecting part 32 projecting from the axis of the disk part 31 to the engine side, and a cylindrical part 33 extending from the outer peripheral end of the disk part 31 to the mission side. In the illustrated front cover 3, the disk portion 31, the protruding portion 32, and the cylindrical portion 33 are integrally formed by pressing a metal plate. The outer peripheral surface of the protruding portion 32 is subjected to a cutting finish, thereby forming a highly accurate cylindrical surface. The disk portion 31 is bolted to the engine drive plate via the connecting portion 34. The outer peripheral surface of the protrusion 32 is fitted into the inner peripheral surface of an axial hole provided in the end surface of the output shaft of the engine, whereby the front cover 3 and the output shaft are centered.

  The pump impeller 5 includes an impeller shell 51, a plurality of impeller blades 52 fixed to the impeller shell 51, and an impeller hub 53 formed on the rotation center side of the impeller shell 51. The outer peripheral end of the impeller shell 51 is fitted to the transmission side end portion of the cylindrical portion 33 of the front cover 3 and is fixed by welding. The front cover 3 and the impeller shell 51 thus integrated constitute a torque converter housing H1. A claw portion 54 is formed on the impeller hub 53, and this claw portion 54 is engaged with a rotor 22a of an oil pump 22 provided in the automatic transmission 20 in a torque transmission direction. That is, the rotational power of the pump impeller 5 is transmitted to the rotor 22a of the oil pump 22, and the oil pump 22 is driven.

  The turbine 6 includes a turbine shell 61, a plurality of turbine blades 62 fixed to the turbine shell 61, and a turbine hub 63 fixed to the rotation center side of the turbine shell 61. The turbine hub 63 is splined to the input shaft 21 of the automatic transmission 20.

  The stator 7 is supported on the stator shaft 74 via a one-way clutch 73. The stator shaft 74 is fixed to the transmission housing H <b> 2 of the automatic transmission 20. An inner race 73 a of the one-way clutch 73 is spline fitted to the outer periphery of the stator shaft 74.

  The lockup clutch 8 is attached to the turbine hub 63 so as to be movable in the axial direction. When oil is supplied from the oil passage A between the stator shaft 74 and the input shaft 21 to the inside of the torque converter housing H1, a space closer to the mission than the lockup clutch 8 in the torque converter housing H1 (dense scattered points). As shown by the dotted line in FIG. 2, the lock-up clutch 8 moves to the engine side. The lockup clutch 8 is pressed against a flat surface provided on the outer peripheral portion of the inner surface of the disk portion 31 of the front cover 3, thereby providing the front cover 3 provided on the input side of the torque converter 10 and the output side. The turbine hub 63 is directly connected. Thereby, the rotation of the output shaft of the engine is directly transmitted to the input shaft 2 of the transmission via the front cover 3, the lockup clutch 8, and the turbine hub 63.

  On the other hand, when oil is supplied to the inside of the torque converter housing H1 from the oil passage B provided inside the input shaft 21, the space on the engine side of the lockup clutch 8 in the torque converter housing H1 (indicated by sparse dots). Is increased, and the lock-up clutch 8 moves to the mission side. As a result, the lockup clutch 8 and the front cover 3 are separated to release the lockup, and torque is transmitted between the front cover 3 provided on the input side and the turbine hub 63 provided on the output side via oil. The

  As shown in FIG. 1, the test apparatus 200 includes a drive unit 210 that applies a rotational driving force to the torque converter housing H1, an oil supply unit 220 that supplies oil to a hydraulic path inside the automatic transmission 20, and an automatic transmission. And an air supply unit 230 that supplies air to the hydraulic path in the interior 20.

  The drive unit 210 includes a tester drive plate 211, a motor 212 that rotationally drives the tester drive plate 211, and a slide mechanism 213 that slides the tester drive plate 211 in the direction of the axis L1.

  As shown in FIG. 3, a positioning hole 211a is provided in the axial center of the tester drive plate 211. In addition, a plurality of torque transmission holes 211 b are arranged at equal intervals in the circumferential direction on the outer peripheral portion of the tester drive plate 211.

  A rotating shaft 214 is fixed to the tester drive plate 211. A spline hole 214 a is provided at the end of the rotating shaft 214 on the engine side. The spline hole 214a of the rotating shaft 214 and the rotating shaft 212a of the motor 212 are spline-fitted so that both can be transmitted with torque and can be moved relative to each other in the direction of the axis L1.

  The slide mechanism 213 includes a cylindrical support portion 216 that rotatably supports the rotating shaft 214 of the tester drive plate 211 via a bearing, a slide base 217 to which the support portion 216 is fixed, and a slide base 217 in the axial direction. A linear guide 218 that is slidably supported and a cylinder 219 that slides the slide base 217 in the direction of the axis L1 are provided. When the slide table 217 is pushed to the mission side by the cylinder 219, the spline hole 214a of the rotation shaft 214 and the rotation shaft 212a of the motor 212 slide while the support portion 216, the slide table 217, the rotation shaft 214, and the tester drive plate. 211 integrally moves to the mission side.

  The oil supply unit 220 includes a dirty tank 221 that stores oil discharged from the hydraulic path of the automatic transmission 20, an oil purifier 222 that purifies the oil in the dirty tank 221, and oil purified by the oil purifier 222. A clean tank 223 to be stored, and an automatic transmission 20, a dirty tank 221, an oil purifier 222, and a pump 224 for circulating oil between the clean tank 223 are provided.

  The air supply unit 230 is provided at a position where air can be supplied to the hydraulic path of the automatic transmission 20. In the present embodiment, a branch pipe 231 is provided in the middle of a pipe 225 that connects the hydraulic path of the automatic transmission 20 and the dirty tank 221, and an air supply unit 230 is provided at the end of the branch pipe 231. A valve 232 is provided in the middle of the branch pipe 231.

  Hereinafter, a test method for the automatic transmission 20 according to an embodiment of the present invention will be described using the test apparatus 200 described above.

  First, as shown in FIG. 2, in a state where the torque converter 10 is assembled to the automatic transmission 20, the locate pin 240 is attached to the connecting portion 34 provided in the torque converter housing H1. In the present embodiment, one locate pin 240 is screwed to each of the screw holes of the connecting portions 34 provided at a plurality of locations (for example, three locations) at equal intervals in the circumferential direction.

  Next, the torque converter 10 and the automatic transmission 20 to which the locate pin 240 is attached are carried into the test apparatus 200 and positioned at a predetermined position in the test apparatus 200. In this state, a pipe 226 extending from the clean tank 223 of the oil supply unit 220 is connected to the oil inlet of the hydraulic path of the automatic transmission 20, and the dirty tank of the oil supply unit 220 is connected to the oil outlet of the hydraulic path of the automatic transmission 20. A pipe 225 extending from 221 is connected. In the present embodiment, pipes 226 and 225 are connected to an oil inlet and an oil outlet for circulating oil between the automatic transmission 20 and an oil cooler (not shown). In addition, in the state carried in to the test apparatus 200, oil is not supplied to the inside of the automatic transmission 20 and the torque converter 10.

  Thereafter, the cylinder 219 of the slide mechanism 213 of the drive unit 210 is driven to move the tester drive plate 211 to the mission side. Then, the protrusion 32 provided in the torque converter housing H1 is fitted into the positioning hole 211a of the tester drive plate 211, and the locate pin 240 attached to the torque converter housing H1 is inserted into the torque transmission hole 211b of the tester drive plate 211. (See dotted line in FIG. 1). At this time, by moving the tester drive plate 211 toward the mission side while slowly rotating the motor 212, the locate pin 240 is inserted into the torque transmission hole 211b while being in phase.

  At this time, the torque converter 10 is connected to the automatic transmission 20 so as to transmit torque, but is not fixed in the axial direction with respect to the automatic transmission 20. Therefore, the torque converter housing H1 is pushed toward the transmission side by the tester drive plate 211, and the torque converter housing H1 and the pump body 23 and the cover 24 (see FIG. 2) of the transmission housing H2 may come into contact with each other. If the torque converter housing H1 is rotated by the tester drive plate 211 in this state, the torque converter housing H1 and the mission housing H2 may slide to generate chips.

  In order to prevent such problems, air is supplied into the torque converter housing H1 before oil is supplied to the hydraulic path of the automatic transmission 20. Specifically, the valve 232 provided in the branch pipe 231 is opened, and air is supplied from the air supply unit 230 to the hydraulic path of the automatic transmission 20 through the pipe 225. Thereby, air is supplied to the inside of the torque converter housing H1, and the internal pressure of the torque converter housing H1 is increased (see the dotted line arrow in FIG. 1). Due to the internal pressure, the torque converter housing H1 moves to the engine side and separates from the transmission housing H2.

  In the present embodiment, air is supplied in the direction opposite to the oil circulation path (see the solid arrow in FIG. 1) when the automatic transmission 20 described later is tested (see the dotted arrow), as shown in FIG. In addition, air is supplied into the torque converter housing H <b> 1 from the oil passage A between the input shaft 21 and the stator shaft 74 of the automatic transmission 20. As a result, the lock-up clutch 8 of the torque converter 10 moves to the engine side and comes into contact with the front cover 3 (see the dotted line in FIG. 2). At the contact portion between the lock-up clutch 8 and the torque converter housing H1, the outlet of the air supplied from the oil passage A is almost blocked, so that the space closer to the transmission side (densely scattered than the lock-up clutch 8). It is easy to increase the internal pressure (shown by dots).

  After separating the torque converter housing H1 from the transmission housing H2, the air supply by the air supply unit 230 is stopped and the valve 232 is closed. In this state, the motor 212 rotates the torque converter housing H1 via the tester drive plate 211 and drives the pump 224 of the oil supply unit 220 to supply oil to the hydraulic path of the automatic transmission 20. As a result, the hydraulic path of the automatic transmission 20 is filled with oil, and the oil circulates through the hydraulic path by the pumping force of the oil pump 22. Then, oil is supplied from the oil passage B inside the input shaft 21 to the inside of the torque converter housing H 1, and the oil is discharged from the oil passage B between the input shaft 21 and the stator shaft 74. The oil circulating in the hydraulic path of the automatic transmission 20 is discharged from the oil outlet of the automatic transmission 20, supplied to the oil purifier 222 through the dirty tank 221, and purified by the oil purifier 222. The purified oil is stored in the clean tank 223 and is supplied again from the oil inlet of the automatic transmission 20 to the hydraulic path by the pump 224 (see the solid arrow in FIG. 1).

  As described above, the torque converter housing H1 is rotationally driven, and the oil is circulated through the hydraulic path of the automatic transmission 20, and the output torque of the automatic transmission 20 and the presence / absence of abnormal noise are inspected. In a state where oil circulates through the hydraulic path of the automatic transmission 20, the entire hydraulic path including the inside of the torque converter housing H1 is always maintained at a positive pressure. As a result, the torque converter housing H1 is always urged away from the transmission housing H2, so that these sliding movements are avoided.

  The present invention is not limited to the above embodiment. For example, in the above embodiment, the case where the fluid supplied to the hydraulic path of the automatic transmission 20 for separating the torque converter housing H1 from the transmission housing H2 is air is shown, but this is not a limitation. Oil may be used as

DESCRIPTION OF SYMBOLS 10 Torque converter 20 Automatic transmission H1 Torque housing H2 Mission housing 200 Test apparatus 210 Drive part 211 Tester drive plate 212 Motor 213 Slide mechanism 220 Oil supply part 230 Air supply part 240 Locate pin

Claims (2)

A method for testing an automatic transmission incorporating a torque converter, comprising:
Coupling the tester drive plate to the torque converter housing for torque transmission;
Separating the torque converter housing from the housing of the automatic transmission by supplying fluid to the inside of the torque converter housing to increase the internal pressure;
A test method for an automatic transmission, in which the tester drive plate is rotated to rotationally drive the torque converter housing, and the automatic transmission test is sequentially performed. An apparatus for testing an automatic transmission in which a torque converter is assembled,
A drive device that rotationally drives the housing of the torque converter, an oil supply unit that supplies oil to a hydraulic path inside the automatic transmission, and an air supply unit that supplies air to the hydraulic path,
A test apparatus for an automatic transmission that increases the internal pressure of a housing of a torque converter by supplying air from the air supply unit to the hydraulic path.

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