JP2016160989A - Torque converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a torque converter which enables a first member and a second member to be securely connected.SOLUTION: In a torque converter, a connection structure 10 has a first screw part 13, a first engagement part 15, a second screw part 53, and a second engagement part 55. The first screw part 13 is provided at one of an impeller shell 31 and a front cover body 21. The first engagement part 15 is provided at one of the impeller shell 31 and the front cover body 21 so as to be arranged side by side with the first screw part 13. The second screw part 53 may be threadedly engaged with the first screw part 13 and is provided at the other of the impeller shell 31 and the front cover body 21. The second engagement part 55 may engage with the first engagement part 15 and is provided at the other of the impeller shell 31 and the front cover body 21.SELECTED DRAWING: Figure 2A

Description

  The present invention relates to a torque converter.

  A conventional torque converter mainly includes a front cover and three types of impellers (impeller, turbine, and stator) (see Patent Document 1). The impeller has an impeller shell, a plurality of impeller blades mounted on the inner side of the impeller shell, and an impeller hub held on the inner peripheral end of the impeller shell. The turbine includes a turbine shell and a plurality of turbine blades attached to the turbine shell. In this torque converter, the front cover and the impeller shell are connected to each other via a screw structure.

JP-A-5-203015

  In the conventional torque converter, when torque is input from the engine and the impeller rotates together with the front cover, hydraulic oil circulates between the impeller, the turbine, and the stator by this rotation. While this circulation is rectified by the stator, both the impeller and the turbine are rotated by the working oil. However, in the connection by the conventional screw structure, when the front cover and the impeller shell are rotated by the torque from the engine, the connection between the two may be loosened.

  This invention is made | formed in view of said problem, Comprising: The objective of this invention is providing the torque converter which can connect a 1st member and a 2nd member reliably.

  (1) A torque converter according to one aspect of the present invention connects a rotatable first member, a second member that forms a space that can be filled with a working fluid together with the first member, and the first member and the second member. And a connecting structure to be provided. The connection structure has a first threaded portion, a first engaging portion, a second threaded portion, and a second engaging portion. The first screwing portion is provided on one of the first member and the second member. The first engaging portion is provided on either the first member or the second member in line with the first screwing portion. The second screwing portion can be screwed into the first screwing portion and is provided on the other of the first member and the second member. The second engaging portion can be engaged with the first engaging portion, and is provided on the other of the first member and the second member.

  In the present torque converter, the connection structure connects the first member and the second member. In the connection structure, the first screwing part and the second screwing part are screwed together, and the first engaging part and the second engaging part are engaged. That is, not only the first screwing portion and the second screwing portion are screwed but also the first engaging portion and the second engaging portion are further engaged, so that the first member and the second member are securely connected. Can be linked.

  (2) The torque converter according to another aspect of the present invention is preferably configured as follows. The connection structure further includes a first contact portion and a second contact portion. The first contact portion is provided on either the first member or the second member. The second contact portion is provided on the other of the first member and the second member. The first member and the second member are positioned relative to each other by the contact between the second contact portion and the first contact portion.

  In the torque converter, in the connection structure, the first member and the second member are positioned relative to each other when the second contact portion and the first contact portion contact each other. Thereby, connection and positioning of a 1st member and a 2nd member can be performed reliably.

  (3) The torque converter according to another aspect of the present invention is preferably configured as follows. An adhesive is disposed between at least one of the first screwed portion and the second screwed portion and between the first engaging portion and the second engaging portion.

  In the present torque converter, the adhesive is disposed between at least one of the first and second screwing portions and between the first and second engaging portions. The first member and the second member can be more reliably connected.

  (4) The torque converter according to another aspect of the present invention is preferably configured as follows. The first connection structure further includes a first groove for arranging the adhesive. The first groove portion is provided in at least one of the first engagement portion and the second engagement portion.

  In this torque converter, since the adhesive is disposed in the first groove portion, the first engagement portion and the second engagement portion can be stably and reliably bonded. That is, the first member and the second member can be connected stably and reliably.

  (5) The torque converter according to another aspect of the present invention is preferably configured as follows. The first connection structure further includes a second groove portion for arranging the adhesive. The second groove is provided in at least one of the vicinity of the first screwing portion and the vicinity of the second screwing portion.

  In the torque converter, since the adhesive is disposed in the second groove portion, the screwing of the first screwing portion and the second screwing portion can be stably and reliably held. That is, the first member and the second member can be connected stably and reliably.

  (6) The torque converter according to another aspect of the present invention is preferably configured as follows. The first engaging portion has a first inclined portion that is inclined in a direction along the rotation axis of the first member. The second engaging portion has a second inclined portion that can come into contact with the first inclined portion.

  In this torque converter, the first inclined portion of the first engaging portion and the second inclined portion of the second engaging portion can contact each other, so that the first screwing portion and the second screwing portion are screwed together. However, the first engaging portion and the second engaging portion can be smoothly engaged.

  (7) The torque converter according to another aspect of the present invention is preferably configured as follows. The first engagement portion and the second engagement portion are formed in a rotation direction with reference to the rotation axis of the first member. One of the first engaging portion and the second engaging portion is disposed on the inner peripheral side of the other of the first engaging portion and the second engaging portion. The outer diameter of one of the first engaging portion and the second engaging portion is larger than the inner diameter of the other of the first engaging portion and the second engaging portion.

  In the present torque converter, since the outer diameter of the first engaging portion (or the second engaging portion) is larger than the inner diameter of the second engaging portion (or the first engaging portion), the first engaging portion and the second engaging portion. The engaged state of the engaging portion can be reliably maintained.

  (8) The torque converter according to another aspect of the present invention is preferably configured as follows. At least one of the screw bottom portion of the first screwing portion aligned in the direction along the rotation axis of the first member and the screw bottom portion of the second screwing portion aligned in the direction along the rotation axis of the first member is the first It is inclined in a direction along the rotation axis of one member.

  In this torque converter, at least one of the screw bottom portion of the first screwing portion arranged in the direction along the rotation axis of the first member and the screw bottom portion of the second screwing portion arranged in the direction along the rotation axis of the first member. By tilting one of them as described above, the first screwing portion and the second screwing portion can be smoothly screwed together.

  (9) The torque converter according to another aspect of the present invention is preferably configured as follows. The first engaging portion has a first inclined portion that is inclined in a direction along the rotation axis of the first member. The second engaging portion has a second inclined portion that can come into contact with the first inclined portion. The inclination angle of at least one of the screw bottom portion of the first screwing portion and the screw bottom portion of the second screwing portion that is inclined in the direction along the rotation axis of the first member is the first inclination portion and the second inclination angle. It is smaller than the inclination angle of at least one of the parts.

  In this torque converter, since the inclination angle of the screw bottom is smaller than the inclination angle of the inclination part, the first screwing part and the second screwing part can be smoothly and reliably screwed together.

(10) The torque converter according to another aspect of the present invention is preferably configured as follows. The first member and the second member are disposed between the engine and the transmission. The first member is disposed on the transmission side, and the second member is disposed on the engine side. When viewed from the engine side, the direction in which the second threaded portion is screwed into the first threaded portion is the same as the rotational direction of the engine. Since the direction in which the two screwing portions are screwed into the first screwing portion and the rotation direction of the engine are set to be the same, even if the first member and the second member are rotated by the engine, the first It is possible to reliably prevent loosening of the screwing portion and the second screwing portion.

  (11) The torque converter according to another aspect of the present invention is preferably configured as follows. The connection structure further includes a fixing structure provided on at least one of the first member and the second member for fixing the connection between the first member and the second member.

  In this torque converter, since the connection structure further includes a fixing structure, the connection between the first member and the second member can be more reliably fixed.

  (12) The torque converter according to another aspect of the present invention is preferably configured as follows. The fixing structure has a welded portion for fixing the connection between the first member and the second member.

  In this torque converter, the connection of the first member and the second member can be more reliably fixed by the welded portion.

  (13) The torque converter according to another aspect of the present invention is preferably configured as follows. The welded portion fixes the connection between the first member and the second member via the holding member.

  In this torque converter, the connection between the first member and the second member can be more reliably fixed by the welded portion via the holding member.

  (14) The torque converter according to another aspect of the present invention is preferably configured as follows. The fixing structure has a caulking portion provided on at least one of the first member and the second member. The connection of the first member and the second member is fixed by caulking and fixing the caulking portion to at least one of the first member and the second member.

  In this torque converter, the connection of the first member and the second member can be easily and reliably fixed by the caulking portion.

  (15) The torque converter according to another aspect of the present invention is preferably configured as follows. The fixing structure includes a pair of groove portions that are provided on the first member and the second member and can face each other, and a ring member that is disposed in the pair of groove portions and prevents the first member and the second member from coming off from each other.

  In this torque converter, the connection between the first member and the second member can be easily and reliably fixed by the ring member disposed in the pair of grooves.

  (16) The torque converter according to another aspect of the present invention is preferably configured as follows. The first member is a front cover. The second member is an impeller. The connection structure connects the opening of the front cover and the opening of the impeller to each other.

  In this torque converter, the front cover and the impeller can be reliably connected by the connecting structure.

  (17) The torque converter according to another aspect of the present invention is preferably configured as follows. The first member is an impeller shell. The second member is a first boss member connected to the impeller shell. The connection structure connects the first hole portion of the impeller shell and the end portion of the first boss member to each other.

  In this torque converter, the impeller shell and the first boss portion coupled to the impeller can be reliably coupled by the coupling structure.

  (18) The torque converter according to another aspect of the present invention is preferably configured as follows. The first member is a front cover body. The second member is a second boss member connected to the front cover body. The connection structure connects the second hole portion of the front cover body and the end portion of the second boss member to each other.

  In this torque converter, the front cover main body and the second boss portion connected to the front cover main body can be reliably connected by the connection structure.

  The torque converter of the present invention can reliably connect the first member and the second member.

1 is a longitudinal sectional view of a torque converter according to a first embodiment of the present invention. The expanded sectional view of the 1st connection structure of a 1st embodiment. The expanded sectional view of the 1st connection structure in other embodiments of a 1st embodiment. The expanded sectional view of the 1st connection structure in other embodiments of a 1st embodiment. The expanded sectional view of the 1st connection structure in other embodiments of a 1st embodiment. The expanded sectional view of the 1st connection structure in other embodiments of a 1st embodiment. The longitudinal cross-sectional view of the torque converter which concerns on 2nd Embodiment of this invention. The expanded sectional view of the 2nd connection structure of a 2nd embodiment. The expanded sectional view of the 2nd connection structure in other embodiments of a 2nd embodiment. The longitudinal cross-sectional view of the torque converter which concerns on 3rd Embodiment of this invention. The expanded sectional view of the 3rd connection structure of a 3rd embodiment. The expanded sectional view of the 2nd connection structure in other embodiments of a 3rd embodiment. The expanded sectional view of the 4th connection structure in the torque converter concerning a 4th embodiment of the present invention. The expanded sectional view of the 4th connection structure in other embodiments of the 4th embodiment of the present invention (the 1). The expanded sectional view of the 4th connection structure in other embodiments of the 4th embodiment of the present invention (the 2). The expanded sectional view (the 3) of the 4th connection structure in other embodiments of a 4th embodiment of the present invention.

[First Embodiment]
<Overall configuration of torque converter>
FIG. 1 shows a torque converter 1 according to a first embodiment of the present invention. Here, OO is the rotating shaft of the torque converter 1. An engine (not shown) is arranged on the left side of FIG. 1, and a transmission (not shown) is arranged on the right side of FIG. Hereinafter, the rotation axis O of the torque converter 1 may be expressed as the rotation axis O of the impeller 3.

  The torque converter 1 is a mechanism for transmitting torque from the crankshaft 50 on the engine side to the main drive shaft 60 of the transmission. The torque converter 1 mainly includes a front cover 2 (an example of a second member), an impeller 3 (an example of a first member), a turbine 4, a stator 5, a lockup device 9, and a first connection structure 10. (An example of a connection structure).

<Basic configuration of torque converter>
The front cover 2 is connected to the crankshaft 40 on the engine side via a flexible plate 41. Specifically, the front cover 2 includes a front cover main body 21 and a front boss 23. The front cover body 21 and the impeller 3 form a hydraulic oil chamber that can be filled with hydraulic oil. The front cover body 21 is connected to the flexible plate 41 via the nut portion 25.

  The nut portion 25 includes a nut main body 25a and a connecting portion 25b formed integrally with the nut main body 25a. A flexible plate 41 is attached to the nut body 25a via bolts 24. The connection part 25b is a male screw part, for example. The connecting portion 25 b (male screw portion) is screwed into the female screw portion 22 provided on the front cover main body 21.

  In this manner, the flexible plate 41 is screwed into the nut main body 25 a by the bolt 24 in a state where the connecting portion 25 b (male screw portion) is screwed into the female screw portion 22 of the front cover main body 21. Thereby, the flexible plate 41 is fixed to the front cover 2.

  Here, an example in which the nut portion 25 is attached to the front cover main body 21 by screwing the nut portion 25 (connecting portion 25b) to the front cover main body 21 (female screw portion 22) has been shown. In addition to the above screwing, the nut portion 25 (nut body 25a) may be welded to the front cover body 21.

  The front boss 23 is provided on the front cover main body 21. The front boss 23 protrudes from the front cover main body 21 toward the engine side, and positions the crankshaft 40 on the engine side. Here, the front boss 23 is fixed to the front cover body 21 by welding, for example.

  The impeller 3 is coupled to the front cover 2 via a first coupling structure 10 (described later). The impeller 3 mainly includes an impeller shell 31, a plurality of impeller blades 32, and an impeller hub 33. The impeller shell 31 is connected to the front cover 2 by the first connection structure 10. The plurality of impeller blades 32 are held inside the impeller shell 31. The impeller hub 33 is provided on the inner peripheral side of the impeller shell 31 (the rotation shaft O side of the impeller 3). Here, the impeller hub 33 is fixed to the impeller shell 31 by welding, for example.

  The turbine 4 is disposed so as to face the impeller shell 31 in the hydraulic oil chamber. The turbine 4 mainly has a turbine shell 4a and a plurality of turbine blades 4b held by the turbine shell 4a. The inner peripheral portion of the turbine shell 4 a is held on the flange portion of the turbine hub 8 by a plurality of rivets. In addition, a spline hole is formed in the inner peripheral portion of the turbine hub 8 to be connected to the main drive shaft 60 extending from the transmission side.

  The stator 5 is disposed between the impeller 3 and the turbine 4. The stator 5 is held on the stator shaft 70 via a one-way clutch.

  The lockup device 9 is a mechanism for mechanically connecting the front cover 2 and the turbine 4. The lockup device 9 is disposed between the front cover 2 and the turbine 4.

<Basic operation of torque converter>
Torque from the crankshaft 40 on the engine side is input from the flexible plate 41 to the front cover 2. This torque is transmitted to the impeller shell 31 connected to the front cover 2, and the impeller 3 rotates. Then, the hydraulic oil flows from the impeller 3 side to the turbine 4 side. At this time, the hydraulic oil rotates the turbine 4 while being rectified by the stator 5. Thereby, the torque of the turbine 4 is output to the main drive shaft 60 via the turbine hub 8.

<Configuration of the first connection structure>
FIG. 2A is a partially enlarged view of the first connection structure 10 of FIG. In FIG. 2A, in order to facilitate the explanation of the first connection structure 10, each part is schematically expressed by enlargement or the like.

  As shown in FIGS. 1 and 2A, the first connection structure 10 is for connecting the impeller 3 and the front cover 2. Specifically, the first connection structure 10 connects the outer peripheral portion 31a of the impeller shell 31 and the outer peripheral portion 21a of the front cover body 21 to each other. More specifically, the first connection structure 10 connects the outer peripheral portion 31a on the opening side of the impeller shell 31 and the outer peripheral portion 21a on the opening side of the front cover body 21 to each other. By connecting the impeller 3 and the front cover 2 by the first connection structure 10, a hydraulic oil chamber (an example of a space) that can be filled with hydraulic oil is formed.

  As shown in FIG. 1, the first connection structure 10 is provided on the outer peripheral portion 31 a on the opening side of the impeller shell 31 and the outer peripheral portion 21 a on the opening side of the front cover body 21.

  As shown in FIG. 2A, the first connection structure 10 provided on the outer peripheral portion 31a on the opening side of the impeller shell 31 includes a first main body portion 11, a first screwing portion 13, a first engaging portion 15, And a first abutting portion 17. The first screwing portion 13, the first engaging portion 15, and the first contact portion 17 are arranged side by side along the rotation axis O of the impeller 3.

  The first main body portion 11 is formed to protrude outward from the outer peripheral portion of the impeller shell 31. The 1st main-body part 11 is formed in the substantially cylindrical shape. The first main body portion 11 is disposed inside the outer peripheral portion on the opening side of the front cover 2. That is, the first main body 11 is disposed on the inner peripheral side of the second main body 51 (described later).

  The first screwing part 13 is formed integrally with the outer peripheral part of the first main body part 11. Specifically, the first screwing portion 13 is formed integrally with the outer peripheral portion of the first main body portion 11 on the opening side.

  The first screwing portion 13 can be screwed into a second screwing portion 53 (described later) of the front cover 2. Here, when viewed from the transmission side, the first screwing portion 13 and the first screwing portion 13 are arranged such that the direction in which the first screwing portion 13 is screwed into the second screwing portion 53 is opposite to the rotational direction of the engine. Two screwing portions 53 are formed.

  The 1st screwing part 13 is a male screw part, for example. The outer diameter (thread diameter) of the first screwing portion 13 is smaller than the outer diameter of the outer peripheral portion of the impeller shell 31. The first threaded portion 13 is formed so that the screw bottom portion is inclined in a direction along the rotation axis O of the impeller 3.

  Specifically, the screw bottoms of the first threaded portions 13 aligned in the direction along the rotation axis O of the impeller 3 are arranged in the direction along the rotation axis O of the impeller 3, that is, the direction in which the first main body portion 11 protrudes. Inclined to approach O. In other words, the valley diameter of the thread groove gradually decreases in the direction in which the first main body portion 11 protrudes (the front end portion of the first main body portion 11). The inclination angle α of the screw bottom portion of the first screwing portion 13 is smaller than the inclination angle β of a first inclination portion 15a (described later) of the first engagement portion 15. Here, the inclination angle of the screw bottom portion of the first screwing portion 13 is set to 3 degrees, for example.

  The thread on the distal end side of the first threaded portion 13 (or the thread on the distal end side of the second threaded portion 53) is a thread groove (or first threaded portion on the distal end side of the second threaded portion 53). 13 can be screwed into the thread groove 13 on the tip side.

  The first engagement portion 15 can be engaged with a second engagement portion 55 (described later) of the front cover 2. Specifically, the first engaging portion 15 can be engaged with the second engaging portion 55 in a state where at least a part of the first screwing portion 13 and the second screwing portion 53 are screwed together.

  The first engaging portion 15 is formed integrally with the outer peripheral portion of the first main body portion 11. Specifically, the first engagement portion 15 is configured so that the base end portion of the first body portion 11 and the first screwing portion 13 are aligned in the direction along the rotation axis O of the impeller 3, that is, the direction in which the first body portion 11 protrudes. Between. The first engaging portion 15 is integrally formed on the outer peripheral portion of the first main body portion 11 in the circumferential direction (rotating direction) with reference to the rotation axis O of the impeller 3.

  An adhesive 19 is disposed between the first engagement portion 15 and the second engagement portion 55. The first engaging portion 15 and the second engaging portion 55 are joined by the adhesive 19.

  More specifically, the first engaging portion 15 includes a first inclined portion 15a and a groove portion 15b (an example of the first groove portion). The first inclined portion 15a can come into contact with a second inclined portion 55a (described later) of the front cover 2. In a state where the first engaging portion 15 is not engaged with the second engaging portion 55, the outer diameter of the first inclined portion 15a is larger than the inner diameter of the second inclined portion 55a. The comparison of the diameters is a comparison at the same position in the direction (axial direction) in which the rotation axis O of the impeller 3 extends. In addition, the outer diameter of the first inclined portion 15 a is larger than the outer diameter (thread diameter) of the first screwing portion 13.

  The first inclined portion 15 a is inclined in a direction along the rotation axis O of the impeller 3. Specifically, the first inclined portion 15a is inclined so as to approach the rotation axis O in the direction along the rotation axis O of the impeller 3, that is, the direction in which the first main body portion 11 protrudes. In other words, the outer diameter of the first inclined portion 15a gradually decreases as it goes in the direction in which the first main body portion 11 protrudes. The inclination angle β of the first inclined portion 15 a is larger than the inclination angle α of the first screwing portion 13. Here, the inclination angle β of the first inclined portion 15a is set to 5 degrees, for example.

  The groove portion 15b is formed in the first inclined portion 15a. The groove portion 15b is a groove portion extending in the circumferential direction of the first inclined portion 15a. An adhesive 19 can be disposed in the groove 15b. The first inclined portion 15a and the second inclined portion 55a are joined to each other by engaging the first inclined portion 15a and the second inclined portion 55a with the adhesive 19 being disposed in the groove portion 15b.

  The first contact portion 17 can contact a second contact portion 57 (described later) of the front cover 2. The first contact portion 17 is, for example, a step portion provided at the proximal end portion of the first main body portion 11. The step portion 17 is formed in an annular shape on the outer periphery of the base end portion of the first main body portion 11. The second contact portion 57 can contact the first contact portion 17 (stepped portion).

  The first connection structure 10 provided in the outer peripheral portion 21a on the opening side of the front cover main body 21 includes a second main body portion 51, a second screwing portion 53, a second engagement portion 55, and a second contact portion 57. And further. The second screwing portion 53, the second engagement portion 55, and the second contact portion 57 are arranged side by side along the rotation axis O of the impeller 3.

  The second main body 51 is formed so as to protrude from the outer peripheral portion 21 a of the front cover main body 21 to the opening side. The 2nd main-body part 51 is formed in the substantially cylindrical shape. The outer diameter of the second main body 51 is substantially the same as the outer diameter of the outer peripheral portion 21 a of the front cover main body 21. The second main body 51 is disposed outside the outer peripheral portion 31 a of the impeller shell 31. That is, the second main body 51 is disposed on the outer peripheral side of the first main body 11.

  The second screwing portion 53 is formed integrally with the inner peripheral portion of the second main body portion 51. Specifically, the second screwing portion 53 is configured so that the base end portion of the second main body portion 51 and the second engaging portion 55 in the direction along the rotation axis O of the impeller 3, that is, the direction in which the second main body portion 51 protrudes. Between.

  The second screwing portion 53 can be screwed into the first screwing portion 13 of the impeller shell 31. Here, when viewed from the engine side, the first screwing portion 13 and the second screwing portion 53 are arranged such that the direction in which the second screwing portion 53 is screwed into the first screwing portion 13 is the same as the rotation direction of the engine. The threaded portion 53 is formed. The second screwing portion 53 is, for example, a female screw portion.

  The second engagement portion 55 can be engaged with the first engagement portion 15 of the impeller shell 31. Specifically, the second engaging portion 55 can be engaged with the first engaging portion 15 in a state where at least a part of the first screwing portion 13 and the second screwing portion 53 are screwed together.

  The second engaging part 55 is formed integrally with the inner peripheral part of the second main body part 51. The second engaging portion 55 is formed integrally with the inner peripheral portion of the second main body portion 51 on the opening side. The second engaging portion 55 is formed integrally with the inner peripheral portion of the second main body portion 51 in the circumferential direction (rotating direction) with reference to the rotation axis O of the impeller 3.

  Specifically, the second engaging portion 55 has a second inclined portion 55a. The second inclined portion 55 a can contact the first inclined portion 15 a of the impeller shell 31. In a state where the second engaging portion 55 is not engaged with the first engaging portion 15, the inner diameter of the second inclined portion 55a is smaller than the outer diameter of the first inclined portion 15a. This comparison of diameters is a comparison at the same position in the axial direction. The inner diameter of the second inclined portion 55 a is smaller than the outer diameter of the outer peripheral portion of the second main body portion 51.

  The second inclined portion 55 a is inclined in a direction along the rotation axis O of the impeller 3. Specifically, the second inclined portion 55a is inclined so as to be separated from the rotation axis O of the impeller 3 in the direction along the rotation axis O of the impeller 3, that is, the direction in which the second main body portion 51 protrudes. In other words, the inner diameter of the second inclined portion 55a gradually increases as it goes in the direction in which the second main body portion 51 protrudes. The inclination angle β of the second inclined portion 55a is substantially the same as the inclination angle β of the first inclined portion 15a. The inclination angle β of the second inclined portion 55 a is larger than the inclination angle α of the first screwing portion 13. Here, the inclination angle β of the second inclined portion 55a is set to 5 degrees, for example.

  The second inclined portion 55a can be engaged with the first inclined portion 15a in a state where at least a part of the first screwing portion 13 and the second screwing portion 53 is screwed. Specifically, in a state where a part of the first screwing part 13 and a part of the second screwing part 53 are screwed together, the second inclined part 55a contacts the first inclined part 15a. And as the 1st screwing part 13 and the 2nd screwing part 53 are screwed together, the 2nd inclined part 55a moves along the 1st inclined part 15a in the state which contacted the 1st inclined part 15a. .

  The second contact portion 57 can contact the first contact portion 17. The second contact portion 57 is provided at the distal end portion of the second main body portion 51. Specifically, the second contact portion 57 is the tip surface of the second main body portion 51. The impeller 3 and the front cover 2 are pivoted by the second contact portion 57 (the front end surface of the second main body portion 51) being in contact with the first contact portion 17 (the step portion of the first contact portion 17). Positioned in the direction.

<Connection form of first connection structure>
Here, the case where the impeller 3 is attached to the front cover 2 via the first connection structure 10 will be described as an example. Even if the front cover 2 is attached to the impeller 3, it can be interpreted in the same manner as described here.

  First, the adhesive 19 is disposed in the groove 15b. Next, with the impeller 3 (impeller shell 31) facing the front cover 2 (front cover main body 21), the tip of the first screwing portion 13 of the impeller shell 31 is engaged with the second screwing of the front cover 2. Screwed into part 53. Then, as the first screwing portion 13 is screwed into the second screwing portion 53, at least one of the first main body portion 11 and the second main body portion 51 is caused by the inclination of the screw bottom portion of the first screwing portion 13. Deform in the radial direction.

  Subsequently, in a state where the first screwing portion 13 is partially screwed into the second screwing portion 53, the first engaging portion 15 (first inclined portion 15a) is changed to the second engaging portion 55 (second inclined portion). Part 55a). And if the 1st screwing part 13 is further screwed in the 2nd screwing part 53, the 1st engaging part 15 (1st inclination part 15a) will follow the 2nd engaging part 55 (2nd inclination part 55a). Then, at least one of the first main body portion 11 and the second main body portion 51 is further deformed in the radial direction. Finally, when the first contact portion 17 contacts the second contact portion 57, the impeller 3 and the front cover 2 are positioned in the axial direction. When the adhesive 19 disposed in the groove 15b is hardened, the connection between the impeller 3 and the front cover 2 is finished.

  Here, the above-described deformation is caused by the rigidity of the outer peripheral portion 31a (the first main body portion 11, the first screwing portion 13, and the first engaging portion 15) of the impeller shell 31 and the outer peripheral portion 21a (first step) of the front cover main body 21. 2 main body part 51, 2nd screwing part 53, the 2nd engaging part 55), and it determines by the rigidity difference. For example, the outer peripheral portion having the smaller rigidity is deformed in the radial direction.

  More specifically, first, in a state in which the first screwing portion 13 is only screwed into the second screwing portion 53, the rigidity (or the first body portion 11) in which the first screwing portion 13 is formed. The rigidity of the second main body 51 in which the second screwing portion 53 is formed is the rigidity of the second main body 51 in which the second screwing portion 53 is formed (or the first in which the first screwing portion 13 is formed). If it is smaller than the rigidity of the main body 11, the first main body 11 (or the second main body 51) is deformed.

  On the other hand, in the state in which the first engaging portion 15 (first inclined portion 15a) is engaged with the second engaging portion 55 (second inclined portion 55a), the first main body in which the first engaging portion 15 is formed. The rigidity of the part 11 (or the rigidity of the second main body part 51 in which the second engaging part 55 is formed) is the rigidity of the second main body part 51 in which the second engaging part 55 is formed (or the first engaging part). The first main body 11 (or the second main body 51) is deformed if it is smaller than the rigidity of the first main body 11 on which 15 is formed.

  As described above, in the first connection structure 10, the first screw part 13 and the second screw part 53 are screwed together, and the first engagement part 15 and the second engagement part 55 are engaged. That is, since not only the first screwing portion 13 and the second screwing portion 53 are screwed but also the first engaging portion 15 and the second engaging portion 55 are further engaged, the impeller 3 and the front cover 2 can be connected reliably.

[Other Embodiments]
(A1) In the said 1st Embodiment, the example in case the outer peripheral part 31a of the impeller shell 31 is arrange | positioned at the inner peripheral side of the outer peripheral part 21a of the front cover main body 21 was shown. Instead, the outer peripheral portion 21 a of the front cover body 21 may be arranged on the inner peripheral side of the outer peripheral portion 31 a of the impeller shell 31.

  In this case, the first main body portion 11, the first screwing portion 13, the first engaging portion 15, and the first contact portion 17 described in the first embodiment are formed on the front cover 2. Further, the second main body 51, the second screwing portion 53, the second engaging portion 55, and the second contact portion 57 described in the first embodiment are formed on the impeller shell 31.

  (B1) In the said 1st Embodiment, the example in case only the screw bottom part of the 1st screwing part 13 inclines in an axial direction was shown. In addition to this, the screw bottom portion of the second screwing portion 53 may also be configured to be inclined in the axial direction.

  (C1) In the said 1st Embodiment, the groove | channel part 15b for arrange | positioning the adhesive agent 19 was shown in the example in case the 1st engaging part 15 is formed. Instead of this, the groove 15 b may be formed in the second engaging portion 55. Further, the groove 15b may be formed in both the first engaging portion 15 and the second engaging portion 55.

  (D1) In the said 1st Embodiment, the example in the case where the groove part 15b for arrange | positioning the adhesive agent 19 was formed in the 1st engaging part 15 was shown. Instead, the groove 15b may be formed in at least one of the first contact portion 17 and the second contact portion 57. Further, it may be formed on at least one of the first engagement portion 15 and the second engagement portion 55 and at least one of the first contact portion 17 and the second contact portion 57.

  (E1) In the first embodiment, the example in which the adhesive 19 is disposed between the first engaging portion 15 and the second engaging portion 55 has been described. You may arrange | position between the screwing part 13 and the 2nd screwing part 53 (refer FIG. 2E).

  In this case, the adhesive 19 is disposed on the screw bottom of the first screwing portion 13. In this state, when the outer peripheral portion 31a of the impeller shell 31 is attached to the outer peripheral portion 21a of the front cover body 21, the screw bottom portion of the first screwing portion 13 (and / or the screw thread portion of the first screwing portion). And the thread part (and / or the screw bottom part of the 2nd screwing part 53) of the 2nd screwing part 53 is joined by an adhesive agent.

  The adhesive 19 may be disposed between the first engaging portion 15 and the second engaging portion 55 and between the first screwing portion 13 and the second screwing portion 53. Good.

  (F1) In the said 1st Embodiment, the groove part 15b for arrange | positioning the adhesive agent 19 was shown in the example in case the 1st engaging part 15 is formed. Instead of this, as shown in FIG. 2B, grooves 15 c and 15 d (an example of the second groove) for arranging the adhesive 19 may be arranged in the vicinity of the first screwing portion 13. Further, only one of the groove portions 15 c and 15 d may be disposed in the vicinity of the first screwing portion 13. The vicinity of the first threaded portion 13 shown here refers to, for example, the distal end portion of the first main body portion 11 and / or the first threaded portion 13 and the first engaging portion 15 (the first engaging portion 15 in the first main body portion 11). 1 between the inclined portions 15a).

  Thereby, when the outer peripheral portion 31a of the impeller shell 31 is attached to the outer peripheral portion 21a of the front cover body 21, the adhesive 19 disposed in the groove portion 15c is applied to the second screwing portion 53, and this adhesion is performed. The first screwing portion 13 and the second screwing portion 53 can be joined by the agent 19. On the other hand, the adhesive 19 arranged in the groove 15 d can join the space between the outer peripheral portion 31 a of the impeller shell 31 and the outer peripheral portion 21 a of the front cover main body 21.

  (G1) In the said 1st Embodiment, the groove part 15b showed the example in the case of extending in the circumferential direction of the 1st engaging part 15 (1st inclination part 15a). Instead, as shown in FIG. 2C, the groove 15b is divided into a first groove 115b extending in the circumferential direction of the first engaging portion 15 (first inclined portion 15a) and a first engaging portion 15 (first inclined). You may comprise from the 2nd groove part 215b extended in the inclination direction (direction which goes to the 1st screwing part 13) of the part 15a). Here, a predetermined number of second groove portions 215b are arranged at a predetermined interval in the circumferential direction. The number of the second groove portions 215b may be one.

  As described above, when the adhesive 19 is disposed in the first groove 115b and / or the second groove 215b, the adhesive 19 is not only placed between the first engagement part 15 and the second engagement part 55 but also in the first groove part 215b. The first screwing portion 13 and the second screwing portion 53 can be guided and arranged. Further, the excessive adhesive 19 can be guided and arranged toward the first screwing portion 13 and the second screwing portion 53.

  (H1) As shown in FIG. 2D, the first connecting structure 10 of the first embodiment includes a small diameter portion 51a having a smaller diameter than the second screwing portion 53, and a seal member 52 capable of contacting the small diameter portion 51a. You may further have the annular groove part 11a for arrange | positioning a sealing member.

  The small diameter part 51 a is formed on the inner peripheral part of the second main body part 51. The small diameter part 51 a is smaller in diameter than the inner diameter of the thread of the second screwing part 53. The seal member 52 seals the hydraulic oil by contacting the small diameter portion 51a. The seal member 52 is, for example, an O-ring. The annular groove portion 11 a is formed in an annular shape on the outer peripheral portion of the first main body portion 11. A seal member 52 is disposed in the annular groove portion 11a.

  In this case, as in the first embodiment, when the impeller 3 and the front cover 2 are connected by the first connecting structure 10, the seal member 52 disposed in the annular groove portion 11a contacts the small diameter portion 51a. Thereby, sealing performance can be improved.

  (I1) In the first embodiment, the example in which the outer diameter of the first inclined portion 15a is larger than the inner diameter of the second inclined portion 55a is shown, but the inner diameter of the second inclined portion 55a is the first inclined portion 15a. You may comprise so that it may become smaller than the outer diameter of.

  (J1) In the first embodiment, an example in which the first contact portion 17 and the second contact portion 57 contact each other on the outer peripheral side of the impeller shell 31 and the outer peripheral side of the front cover main body 21 has been described. . Instead, as shown in FIG. 2E, the first contact portion 17 is formed at the distal end portion of the first main body portion 11, and the second contact portion 57 is provided at the proximal end portion of the second main body portion 51. You may form in the level | step-difference part formed. In this case, the first contact portion 17 and the second contact portion 57 contact each other on the inner peripheral side of the impeller shell 31 and the inner peripheral side of the front cover main body 21. As a result, entry of foreign matter into the internal space of the torque converter 1, for example, entry of the adhesive 19 can be prevented.

  Further, by using both the configuration shown here (configuration of FIG. 2E) and the configuration of the first embodiment (configuration of FIG. 2A), the first contact portion 17 and the second contact portion 57 are connected to the impeller shell. The inner and outer sides of 31 and the front cover body 21 may be in contact with each other. Thereby, it is possible to more reliably prevent entry of foreign matter into the internal space of the torque converter 1, for example, entry of the adhesive 19.

[Second Embodiment]
The configuration of the torque converter according to the second embodiment of the present invention is substantially the same as that of the first embodiment except for the connection configuration of the front cover 2 and the impeller 3 and the configuration of the second connection structure 110. For this reason, in 2nd Embodiment, detailed description is abbreviate | omitted about the structure similar to 1st Embodiment. In addition, the configuration omitted here conforms to the description of the first embodiment.

  As shown in FIG. 3, the torque converter 1 mainly includes a front cover 2, an impeller 3, a turbine 4, a stator 5, a lock-up device 9, and a second connection structure 110 (an example of a connection structure). have. In FIG. 3, the same reference numerals are given to the same configurations as those in the first embodiment.

  The impeller 3 is connected to the front cover 2. The impeller 3 mainly includes an impeller shell 31 (an example of a first member), a plurality of impeller blades 32, and an impeller hub 33 (an example of a second member, an example of a first boss member). FIG. 3 shows an example in which the impeller shell 31 is connected to the front cover 2 by welding, but the impeller shell 31 is connected to the front via the first connection structure 10 (see FIG. 1) described above. The cover 2 may be connected.

  As shown in FIG. 4A, the impeller shell 31 has a first hole 131. The first hole 131 is a hole formed around the rotation axis O of the impeller 3. The impeller hub 33 is connected to the first hole 131. 4A is a partially enlarged view of the second connection structure 110 of FIG. In FIG. 4A, each part is schematically expressed by enlarging or the like in order to facilitate the description of the second connection structure 110.

  The second connection structure 110 is for connecting the impeller shell 31 and the impeller hub 33. Specifically, the second connection structure 110 connects the center portion of the impeller shell 31 and the end portion of the impeller hub 33 with respect to the rotation axis O of the impeller 3. By connecting the impeller shell 31 and the impeller hub 33 by the second connecting structure 110, a hydraulic oil chamber (an example of a space) that can be filled with hydraulic oil is formed inside the impeller hub 33.

  The second connection structure 110 is provided in the end portion 33 a (end portion of the first boss member) of the impeller hub 33 and the first hole portion 131 of the impeller shell 31.

  The second connection structure 110 provided at the end portion 33a of the impeller hub 33 includes a third main body portion 111, a third screwing portion 113, a third engagement portion 115, and a third contact portion 117. ing.

  The third main body 111 is provided at the end 33 a of the impeller hub 33. Specifically, the third main body 111 is formed to protrude outward from the end 33 a of the impeller hub 33. The 3rd main-body part 111 is formed in the substantially cylindrical shape. The third main body 111 is disposed on the inner periphery of the first hole 131 of the impeller shell 31. The third engaging portion 115 has a third inclined portion 115a.

  Other configurations are substantially the same as the configurations of the first screwing portion 13, the first engagement portion 15, and the first contact portion 17 described in the first embodiment. For this reason, description of these structures is abbreviate | omitted here.

  The second connection structure 110 provided in the first hole 131 of the impeller shell 31 further includes a fourth screwing portion 153, a fourth engagement portion 155, and a fourth contact portion 157. The fourth screwing portion 153 is provided on the inner peripheral portion of the first hole portion 131. The fourth engaging portion 155 is provided on the inner peripheral portion of the first hole portion 131. The fourth engaging portion 155 has a fourth inclined portion 155a. The fourth contact portion 157 is a portion of the first hole 131 on the transmission side.

  Other configurations are substantially the same as the configurations of the second screwing portion 53, the second engaging portion 55, and the second contact portion 57 described in the first embodiment. For this reason, description of these structures is abbreviate | omitted here.

  In the second embodiment, the opening side of the first hole 131 of the impeller shell 31 is the side on which the end of the impeller hub 33 is mounted. The opening side of the end portion of the impeller hub 33 is a side on which the first hole 131 of the impeller shell 31 is mounted.

  When the second connection structure 110 is configured in this way, first, the adhesive 19 is applied to the third engagement portion 115 (third inclined portion 115a). Next, the tip end portion of the third screwing portion 113 of the impeller hub 33 is screwed into the fourth screwing portion 153 of the impeller shell 31. Then, as the third screwing portion 113 is screwed into the fourth screwing portion 153, the third main body 111 is deformed radially inward due to the inclination of the screw bottom portion of the third screwing portion 113.

  Next, in a state where the third screwing portion 113 is partially screwed into the fourth screwing portion 153, the third engaging portion 115 (third inclined portion 115a) is changed to the fourth engaging portion 155 (fourth inclined portion). Part 155a). And if the 3rd screwing part 113 is further screwed in the 4th screwing part 153, the 3rd engaging part 115 (3rd inclination part 115a) will follow the 4th engaging part 155 (4th inclination part 155a). The third main body 111 is further deformed in the radial direction. Finally, when the third contact portion 117 contacts the fourth contact portion 157, the impeller hub 33 and the impeller shell 31 are positioned in the axial direction. When the adhesive 19 is hardened between the third engagement portion 115 and the fourth engagement portion 155, the connection between the impeller hub 33 and the impeller shell 31 is completed.

  As described above, in the second connection structure 110, the third screwing part 113 and the fourth screwing part 153 are screwed together, and the third engaging part 115 and the fourth engaging part 155 are engaged. That is, not only the third screwing portion 113 and the fourth screwing portion 153 are screwed but also the third engaging portion 115 and the fourth engaging portion 155 are further engaged, so that the impeller shell 31 and the impeller hub 33 can be reliably connected.

[Other Embodiments]
(A2) In the said 2nd Embodiment, the 1st hole 131 of the impeller shell 31 showed the example in case the 2nd connection structure 110 was comprised. Instead, as shown in FIG. 4B, the first boss portion 132 is provided on the impeller shell 31 around the rotation axis O of the impeller 3 so that the first boss portion 132 constitutes the second connection structure 110. Also good. The first boss part 132 protrudes outward from the first hole part 131 of the impeller shell 31 and is integrally formed.

  In this case, the second connection structure 110 is provided at the end portion 33 a of the impeller hub 33 and the first boss portion 132 of the impeller shell 31. The second connection structure 110 is for connecting the end portion 33 a of the impeller hub 33 and the first boss portion 132 of the impeller shell 31. Specifically, the second connection structure 110 includes the first boss portion 132 of the impeller shell 31 and the end portion 33a of the impeller hub 33 (an example of the end portion of the second boss member) with reference to the rotation axis O of the impeller 3. , Connect to each other. By connecting the end 33a of the impeller hub 33 and the first boss 132 of the impeller shell 31 by the third connecting structure 210, the first boss 132 and / or the impeller hub 33 can be filled with hydraulic oil. An oil chamber (an example of a space) is formed.

  As shown in FIG. 4B, the configuration of the second connection structure 110 is substantially the same as the configuration of the first embodiment shown in FIG. 2A. 4B is a line symmetry diagram with respect to a straight line perpendicular to the rotation axis O of FIG. 1 in FIG. 2A.

  For example, as shown in FIG. 4B, the second connection structure 110 provided at the end portion 33 a of the impeller hub 33 has the configuration of the first connection structure 10 of the outer peripheral portion 31 a on the opening side of the impeller shell 31 (see FIG. 2A). Is substantially the same. Further, the second connection structure 110 provided in the first boss portion 132 of the impeller shell 31 is the first connection portion provided on the outer peripheral portion 21a on the opening side of the front cover main body 21 except for the formation position of the fourth main body portion 133. It is substantially the same as the structure of the connection structure 10 (see FIG. 2A).

  For this reason, only the 4th main-body part 133 is demonstrated here with reference to FIG. 4B. In addition, about the structure which attached | subjected the code | symbol same as FIG. 2A, and the structure which attached | subjected the code | symbol same as FIG. 4A, description abbreviate | omitted here is based on description of FIG. 2A and FIG. 4A.

  The fourth main body portion 133 is formed to protrude outward on the distal end side of the first boss portion 132. The fourth main body 133 is formed in a substantially cylindrical shape. The fourth main body portion 133 is disposed inside the end portion 33 a of the impeller hub 33. That is, the end portion 33 a of the impeller hub 33 is connected to the outer peripheral portion of the first boss portion 132 of the impeller shell 31 by the second connection structure 10.

  Even if comprised in this way, the 2nd connection structure 110 can be comprised and the impeller shell 31 and the impeller hub 33 can be connected reliably. Here, an example in which the end portion 33a of the impeller hub 33 is connected to the outer peripheral portion of the first boss portion 132 of the impeller shell 31 is shown, but the first boss portion 132 of the impeller shell 31 is connected to the impeller hub 33. You may make it connect with the outer peripheral part of the edge part 33a.

  (B2) In (A2) above, an example is shown in which the contact portion 17 and the contact portion 57 contact each other on the outer peripheral side of the first boss portion 132 and the outer peripheral side of the impeller hub 33 of the impeller shell 31. However, as shown in FIG. 2E of (J1) of the first embodiment, the contact portion 17 and the contact portion 57 may be configured.

  (C2) In the second embodiment and the above (A2), an example in which the adhesive 19 is applied to the third engagement portion 115 (third inclined portion 115a) has been described. Alternatively, as in other embodiments of the first embodiment, grooves 15b, 15c, 15d, 115b, and 215b may be formed, and the adhesive 19 may be disposed in the grooves 15b, 15c, 15d, 115b, and 215b.

  (D2) In the second embodiment and the above (A2), an example in which the adhesive 19 is disposed between the third engagement portion 115 and the fourth engagement portion 155 has been described. The agent 19 may be disposed between the third screwing part 113 and the fourth screwing part 153.

  (E2) In the second embodiment and (A2) above, the description of the second connection structure 110 has been mainly made. However, the second connection structure 110 and the first connection structure 10 of the first embodiment are used in combination. May be.

  (F2) The configuration of (H1) of the first embodiment may be further added to the configuration of the second embodiment and the above (A2).

[Third Embodiment]
The configuration of the torque converter according to the third embodiment of the present invention is substantially the same as that of the first embodiment except for the connection configuration of the front cover 2 and the impeller 3 and the configuration of the third connection structure 210. For this reason, in 3rd Embodiment, detailed description is abbreviate | omitted about the structure similar to 1st Embodiment. In addition, the configuration omitted here conforms to the description of the first embodiment.

  As shown in FIG. 5, the torque converter 1 mainly includes a front cover 2, an impeller 3, a turbine 4, a stator 5, a lockup device 9, and a third connection structure 210 (an example of a connection structure). have.

  The front cover 2 is connected to the impeller 3. The front cover 2 includes a front cover main body 21 (an example of a first member) and a front boss 23 (an example of a second member, an example of a second boss member). FIG. 3 shows an example in which the front cover 2 is connected to the impeller shell 31 by welding, but the impeller shell 31 is connected to the front via the first connecting structure 10 (see FIG. 1) described above. The cover 2 may be connected.

  As shown in FIG. 6, the front cover main body 21 has a second hole 121. The second hole 121 is a hole formed around the rotation axis O of the impeller 3. The front boss 23 is connected to the second hole 121 of the front boss 23. FIG. 6 is a partially enlarged view of the third connection structure 210 of FIG. In FIG. 6, in order to facilitate the explanation of the third connection structure 210, each part is schematically expressed by enlargement or the like.

  The third connection structure 210 is for connecting the front cover body 21 and the front boss 23. Specifically, the third connection structure 210 connects the center portion of the front cover body 21 with respect to the rotation axis O of the impeller 3 and the end portion 23a of the front boss 23 (end portion of the second boss member) to each other. To do. By connecting the front cover main body 21 and the front boss 23 by the third connecting structure 210, a hydraulic oil chamber (an example of a space) that can be filled with hydraulic oil is formed inside the front boss 23.

  The third connection structure 210 is provided at the end 23 a of the front boss 23 and the second hole 121 of the front cover body 21.

  The third connection structure 210 provided at the end 23a of the front boss 23 includes a fifth main body 211, a fifth screwing portion 213, a fifth engagement portion 215, and a fifth contact portion 217. doing.

  The fifth main body 211 is provided at the end 23 a of the front boss 23. Specifically, the fifth main body 211 is formed to protrude outward from the end 23 a of the front boss 23. The fifth main body 211 is formed in a substantially cylindrical shape. The fifth main body 211 is disposed on the inner peripheral portion of the second hole 121 of the front cover main body 21. The fifth engaging portion 215 has a fifth inclined portion 215a.

  Other configurations are substantially the same as the configurations of the first screwing portion 13, the first engagement portion 15, and the first contact portion 17 described in the first embodiment. For this reason, description of these structures is abbreviate | omitted here.

  The third connection structure 210 provided in the second hole 121 of the front cover main body 21 further includes a sixth screwing portion 253, a sixth engaging portion 255, and a sixth contact portion 257. . The sixth screwing part 253 is provided on the inner peripheral part of the second hole part 121. The sixth engaging portion 255 is provided on the inner peripheral portion of the second hole portion 121. The sixth engaging portion 255 has a sixth inclined portion 255a. The sixth contact portion 257 is a portion of the second hole 131 on the engine side.

  Other configurations are substantially the same as the configurations of the second screwing portion 53, the second engaging portion 55, and the second contact portion 57 described in the first embodiment. For this reason, description of these structures is abbreviate | omitted here.

  In the third embodiment, the opening side of the second hole 121 of the front cover body 21 is the side on which the end 23a of the front boss 23 is mounted. The opening side of the end 23a of the front boss 23 is the side on which the second hole 121 of the front cover body 21 is mounted.

  When the third connection structure 210 is configured in this manner, first, the adhesive 19 is applied to the fifth engagement portion 215 (the fifth inclined portion 215a). Next, the tip end portion of the fifth screwing portion 213 of the front boss 23 is screwed into the sixth screwing portion 253 of the second hole 121 of the front cover body 21. Then, as the fifth screwing portion 213 is screwed into the sixth screwing portion 253, the fifth main body portion 211 is deformed radially inward due to the inclination of the screw bottom portion of the fifth screwing portion 213.

  Next, in a state where the fifth screwing portion 213 is partially screwed into the sixth screwing portion 253, the fifth engaging portion 215 (the fifth inclined portion 215a) is changed to the sixth engaging portion 255 (the sixth inclined portion). Part 255a). When the fifth screwing portion 213 is further screwed into the sixth screwing portion 253, the fifth engaging portion 215 (fifth inclined portion 215a) follows the sixth engaging portion 255 (sixth inclined portion 255a). The fifth main body 211 is further deformed in the radial direction. Finally, when the fifth contact portion 217 contacts the sixth contact portion 257, the front boss 23 and the front cover body 21 are positioned in the axial direction. When the adhesive 19 is hardened between the fifth engaging portion 215 and the sixth engaging portion 255, the connection between the front boss 23 and the front cover main body 21 is completed.

  As described above, in the third connection structure 210, the fifth screwing part 213 and the sixth screwing part 253 are screwed together, and the fifth engaging part 215 and the sixth engaging part 255 are engaged. That is, not only the fifth screwing part 213 and the sixth screwing part 253 are screwed but also the fifth engaging part 215 and the sixth engaging part 255 are further engaged, The front boss 23 can be reliably connected.

[Other Embodiments]
(A3) In the said 3rd Embodiment, the 2nd hole part 121 of the front cover main body 21 showed the example in case the 3rd connection structure 210 was comprised. Instead, the second boss portion 122 may be provided on the front cover body 21 around the rotation axis O of the impeller 3, and the second boss portion 122 may constitute the third connection structure 210. The second boss portion 122 protrudes outward from the second hole portion 121 of the front cover body 21 and is integrally formed.

  In this case, the third connection structure 210 is provided at the end portion 23 a of the front boss 23 and the second boss portion 122 of the front cover body 21. The third connection structure 210 is for connecting the end 23 a of the front boss 23 and the second boss 122 of the front cover body 21. Specifically, the third connection structure 210 includes the second boss portion 122 of the front cover body 21 and the end portion 23a of the front boss 23 (an example of the end portion of the second boss member) with respect to the rotation axis O of the impeller 3. ) Are connected to each other. By connecting the end portion 23a of the front boss 23 and the second boss portion 122 of the front cover body 21 by the third connecting structure 210, the second boss portion 122 and / or the front boss 23 is filled with hydraulic oil. A possible hydraulic oil chamber (an example of a space) is formed.

  The configuration of the third connection structure 210 is substantially the same as the configuration of the first embodiment shown in FIG. 2A, as shown in FIG. 6B.

  For example, as shown in FIG. 6B, the third connection structure 210 provided at the end 23a of the front boss 23 is the configuration of the first connection structure 10 provided at the outer peripheral portion 21a on the opening side of the front cover body 21 (FIG. (See 2A). Further, the third connection structure 210 provided in the second boss portion 122 of the front cover body 21 is the first connection structure 10 of the outer peripheral portion 31a on the opening side of the impeller shell 31 except for the position where the sixth body portion 123 is formed. (See FIG. 2A) is substantially the same.

  For this reason, only the sixth main body 123 will be described here with reference to FIG. 6B. In addition, in the structure which attached | subjected the code | symbol same as FIG. 2A, and the structure which attached | subjected the code | symbol same as FIG. 6A, description abbreviate | omitted here is based on description of FIG. 2A and FIG. 6A.

  The sixth main body portion 133 is formed to protrude outward on the distal end side of the second boss portion 122. The sixth main body portion 123 is formed in a substantially cylindrical shape. The sixth main body 123 is disposed inside the end 23 a of the front boss 23. That is, the end portion 23 a of the front boss 23 is connected to the outer peripheral portion of the second boss portion 122 of the front cover body 21 by the third connection structure 210.

  Even if comprised in this way, the 3rd connection structure 210 can be comprised and the front cover main body 21 and the front boss | hub 23 can be connected reliably. Here, an example in which the end portion 23a of the front boss 23 is connected to the outer peripheral portion of the second boss portion 122 of the front cover main body 21 is shown, but the second boss portion 122 of the front cover main body 21 is Alternatively, the front boss 23 may be connected to the outer peripheral portion of the end portion 23a.

  (B3) In (A3) above, an example in which the contact portion 17 and the contact portion 57 contact each other on the outer peripheral side of the second boss portion 122 and the outer peripheral side of the front boss 23 of the front cover body 21. As shown in FIG. 2E of (J1) of the first embodiment, the contact portion 17 and the contact portion 57 may be configured.

  (C3) In the third embodiment, the example in which the adhesive 19 is applied to the fifth engaging portion 215 (the fifth inclined portion 215a) has been described. However, the first embodiment and / or the other first embodiment are applied. Similarly to the embodiment of the embodiment, the grooves 15b, 15c, 15d, 115b, and 215b may be formed, and the adhesive 19 may be disposed in the grooves 15b, 15c, 15d, 115b, and 215b.

  (D3) In the third embodiment, an example in which the adhesive 19 is disposed between the fifth engagement portion 215 and the sixth engagement portion 255 has been described. You may arrange | position between the screwing part 213 and the 6th screwing part 253. FIG.

  (E3) Although the third connection structure 110 has been mainly described in the third embodiment, the third connection structure 210 and the first connection structure 10 of the first embodiment may be used in combination.

  (F3) Although the third connection structure 210 has been mainly described in the third embodiment, the third connection structure 210 and the second connection structure 110 of the second embodiment may be used in combination.

  (G2) The configuration of (H1) of the first embodiment may be further added to the configuration of the third embodiment and the above (A3).

[Fourth Embodiment]
The configuration of the torque converter according to the fourth embodiment of the present invention is substantially the same as that of the first embodiment except for the configuration of the fourth connection structure 310. For this reason, in 4th Embodiment, detailed description is abbreviate | omitted about the structure similar to 1st Embodiment. In addition, the configuration omitted here conforms to the description of the first embodiment.

  The fourth connection structure 310 includes the first connection structure 10 described in the first embodiment and the fixing structure 410. Since the 1st connection structure 10 is the same structure as 1st Embodiment, description is abbreviate | omitted here.

  The fixing structure 410 is provided on the impeller 3 and the front cover 2 and fixes the connection between the impeller 3 and the front cover 2.

  The fixing structure 410 includes a holding member 411 and a welding portion 412. The holding member 411 is formed in a plate shape. The holding member 411 is disposed on the outer peripheral portion 31 a of the impeller shell 31 and the outer peripheral portion 21 a of the front cover main body 21. Specifically, each of the plurality of holding members 411 is disposed at a predetermined interval in the circumferential direction in a state of straddling the outer peripheral portion 31 a of the impeller shell 31 and the outer peripheral portion 21 a of the front cover main body 21.

  The welded portion 412 fixes the connection between the outer peripheral portion 31 a of the impeller shell 31 and the outer peripheral portion 21 of the front cover main body 21 via the holding member 411. The welded portion 412 is provided on the holding member 411, the outer peripheral portion of the impeller shell 31, and the outer peripheral portion of the front cover 2. The welding part 412 fixes the outer peripheral part of the holding member 411 and the impeller shell 31, and the outer peripheral part of the holding member 411 and the front cover 2 by welding, for example, projection welding. By this welded portion 412, the outer peripheral portions of the holding member 411 and the impeller shell 31 and the outer peripheral portions of the holding member 411 and the front cover 2 are joined.

  By this fixing structure 410, the impeller 3 and the front cover 2 can be reliably connected and fixed.

[Other Embodiments]
(A4) In the fourth embodiment, an example in which the connection between the outer peripheral portion of the impeller shell 31 and the outer peripheral portion of the front cover 2 is fixed by the welded portion 412 via the holding member 411 is shown.

  Instead of this, as shown in FIG. 8A, a fixing structure 510 may be used. In this case, in a state where the first contact portion 17 of the impeller shell 31 and the second contact portion 57 of the front cover main body 21 are in contact, the outer peripheral portion 31a of the impeller shell 31 and the outer peripheral portion 21a of the front cover main body 21 are It is directly fixed by the welded portion 413. In FIG. 8A, the outer peripheral part 31a of the impeller shell 31 and the outer peripheral part 21a of the front cover main body 21 are joined by spot welding, for example. Even if the fixing structure 510 is configured in this manner, the impeller 3 and the front cover 2 can be more reliably connected and fixed.

  Although an example in which spot welding is used is shown here, laser welding, plasma welding, or the like may be used.

  (B4) In the fourth embodiment, an example in which the connection between the outer peripheral portion of the impeller shell 31 and the outer peripheral portion of the front cover 2 is fixed by the welded portion 412 via the holding member 411 is shown.

  Instead of this, as shown in FIG. 8B, a fixing structure 610 may be used. In this case, the fixing structure 610 includes a caulking portion 611 and a concave portion 612. The caulking portion 611 is provided on the outer peripheral portion 21 a of the front cover main body 21, for example, the second main body portion 51. The recess 612 is provided in the outer peripheral portion 31 a of the impeller shell 31, for example, the first main body portion 11. In this case, the second contact portion 57 is provided at the tip portion (tip surface) of the caulking portion 611.

  Here, in a state where the first contact portion 17 of the impeller shell 31 and the second contact portion 57 of the front cover body 21 are in contact, the caulking portion 611 is in contact with the concave portion 612 of the outer peripheral portion 31 a of the impeller shell 31. The caulking is fixed. By configuring the fixing structure 610 in this manner, the impeller 3 and the front cover 2 can be more reliably connected and fixed.

  In addition, you may use together the fixing structure 610 shown here and the fixing structure 410 of the said 4th Embodiment. Further, the fixing structure 610 shown here and the fixing structure 510 shown in (A4) above may be used in combination.

  (C4) In the fourth embodiment, the example in which the connection between the outer peripheral portion of the impeller shell 31 and the outer peripheral portion of the front cover 2 is fixed by the welded portion 412 via the holding member 411 is shown.

  Alternatively, as shown in FIG. 8C, a fixing structure 710 may be configured. The fixing structure 710 includes a pair of groove portions 711 and a snap ring 712 (an example of a ring member).

  One of the pair of groove portions 711 is provided on the inner peripheral side of the outer peripheral portion 31 a (second main body portion 51) of the impeller shell 31. The other of the pair of groove portions 711 is provided on the outer peripheral side of the outer peripheral portion 21 a (first main body portion 11) of the front cover main body 21. The snap ring 712 is disposed in the pair of grooves 711 and prevents the impeller 3 and the front cover 2 from coming off in the axial direction.

  In this case, the impeller 3 is attached to the front cover 2 by the first connecting structure 10 as described in the first embodiment in a state where the snap ring 712 is disposed in the groove 711 of the impeller shell 31. At this time, the first contact portion 17 of the impeller shell 31 and the second contact portion 57 of the front cover main body 21 are in contact with each other, and the groove portion 711 of the impeller shell 31 is disposed at a position facing the groove portion 711 of the front cover main body 21. Then, the snap ring 712 disposed in the groove portion 711 of the impeller shell 31 engages with the groove portion 712 of the front cover main body 21. By configuring the fixing structure 610 in this manner, the impeller 3 and the front cover 2 can be more reliably connected and fixed.

  In addition, you may use together the fixing structure 710 shown here and the fixing structure 410 of the said 4th Embodiment. Further, the fixing structure 710 shown here and the fixing structures 510 and 610 shown in (A4) and / or (B4) above may be used in combination.

DESCRIPTION OF SYMBOLS 1 Torque converter 2 Front cover 3 Impeller 4 Turbine 10 1st connection structure 11 1st main-body part 13 1st screwing part 15 1st engaging part 15b Groove part 17 1st contact part 19 Adhesive 21 Front cover main body 23 Front boss 31 Impeller shell 33 Impeller hub 53 Second screwing part 55 Second engagement part 57 Second contact part 110 Second connection structure 111 Third main body part 113 Third screw part 115 Third engagement part 117 Third contact 153 Fourth engagement portion 155 Fourth engagement portion 157 Fourth contact portion 210 Third connection structure 211 Fifth main body portion 213 Fifth engagement portion 215 Fifth engagement portion 217 Fifth contact portion 253 Sixth Threaded portion 255 Sixth engaging portion 257 Sixth contact portion 310 Fourth connection structure 410, 510, 610, 710 Fixing structure 411 Holding member 412, 413 Welded portion 611 Caulking part 711 Groove part 712 Snap ring

Claims (18)

A rotatable first member;
A second member that forms a space that can be filled with a working fluid together with the first member;
A connection structure for connecting the first member and the second member;
With
The connection structure includes a first screwing portion provided on one of the first member and the second member, and one of the first member and the second member arranged in the first screwing portion. A first engaging portion provided; a second screwing portion provided on one of the first member and the second member and screwable with the first screwing portion; the first member; A second engaging portion provided on either one of the second members and engageable with the first engaging portion,
A torque converter comprising: The connection structure includes a first contact portion provided on one of the first member and the second member, and a first contact portion provided on the other of the first member and the second member. A second contact portion that positions the first member and the second member by contacting each other,
The torque converter according to claim 1. An adhesive is disposed between at least one of the first screwed portion and the second screwed portion and between the first engaging portion and the second engaging portion.
The torque converter according to claim 1 or 2. The first connection structure further includes a first groove part for arranging an adhesive,
The first groove is provided in at least one of the first engagement portion and the second engagement portion.
The torque converter of any one of Claim 1 to 3. The first connection structure further includes a second groove for arranging an adhesive,
The second groove portion is provided in at least one of the vicinity of the first screwing portion and the vicinity of the second screwing portion.
The torque converter of any one of Claim 1 to 4. The first engaging portion has a first inclined portion that is inclined in a direction along the rotation axis of the first member,
The second engaging portion has a second inclined portion that can contact the first inclined portion,
The torque converter of any one of Claim 1 to 5. The first engagement portion and the second engagement portion are formed in a rotation direction with a rotation axis of the first member as a reference,
Either one of the first engaging portion and the second engaging portion is disposed on the inner peripheral side of the other of the first engaging portion and the second engaging portion,
The outer diameter of one of the first engaging portion and the second engaging portion is larger than the inner diameter of the other of the first engaging portion and the second engaging portion.
The torque converter of any one of Claim 1 to 6. At least one of the screw bottom portion of the first screwing portion aligned in the direction along the rotation axis of the first member and the screw bottom portion of the second screwing portion aligned in the direction along the rotation axis of the first member is , Inclining in a direction along the rotation axis of the first member,
The torque converter of any one of Claim 1 to 7. The first engaging portion has a first inclined portion that is inclined in a direction along the rotation axis of the first member,
The second engaging portion has a second inclined portion that can contact the first inclined portion,
The inclination angle of at least one of the screw bottom portion of the first screwing portion and the screw bottom portion of the second screwing portion that is inclined in the direction along the rotation axis of the first member is the first inclination portion and Smaller than an inclination angle of at least one of the second inclined portions,
The torque converter of any one of Claim 1 to 8. The first member and the second member are disposed between the engine and the transmission,
The first member is disposed on the transmission side, the second member is disposed on the engine side,
The direction in which the second threaded portion is screwed into the first threaded portion when viewed from the engine side is the same as the rotational direction of the engine.
The torque converter of any one of Claim 1 to 9. The connection structure further includes a fixing structure provided on at least one of the first member and the second member for fixing the connection between the first member and the second member.
The torque converter of any one of Claim 1 to 10. The fixing structure has a weld for fixing the connection between the first member and the second member.
The torque converter according to claim 11. The welded portion fixes the connection between the first member and the second member via a holding member.
The torque converter according to claim 12. The fixing structure includes a caulking portion provided on at least one of the first member and the second member, and the caulking portion is caulked and fixed to at least one of the first member and the second member. By doing so, the connection of the first member and the second member is fixed,
The torque converter according to any one of claims 11 to 13. The fixing structure includes a pair of groove portions that are provided in the first member and the second member and can face each other, and a ring member that is disposed in the pair of groove portions and prevents the first member and the second member from coming off from each other. Having
The torque converter of any one of Claim 11 to 14. The first member is an impeller;
The second member is a front cover;
The connection structure connects the opening of the impeller and the opening of the front cover to each other.
The torque converter of any one of Claim 1 to 15. The first member is an impeller shell;
The second member is a first boss member connected to the impeller shell,
The connection structure connects the first hole of the impeller shell and the end of the first boss member to each other.
The torque converter of any one of Claim 1 to 15. The first member is a front cover body;
The second member is a second boss member connected to the front cover body,
The connection structure connects the second hole portion of the front cover body and the end portion of the second boss member to each other.
The torque converter of any one of Claim 1 to 15.

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