JPH08285036A - Torque converter for automatic transmission - Google Patents

Abstract

PURPOSE: To reduce oil passage resistance in the case of using an annular clearance, formed between a torque converter sleeve and a shaft, as an oil passage, and improve assembling workability. CONSTITUTION: Operating oil is fed to a torque converter 6 through an annular oil passage A formed by fitting a torque converter shaft 5, connected to a pump impeller 7 so as, to rotatory-drive an inner gear 3, with play to the peripheral part of a stator shaft 8. Assembly is carried out with protruding parts E, provided protrusively at four circumferential places in a part in the axial direction of the inner peripheral part of the shaft 5, as a guide.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque converter for an automatic transmission, and more particularly to a technique for using an annular gap formed by loosely fitting a torque converter sleeve on a stator shaft in an oil passage of the torque converter. .

[0002]

BACKGROUND OF THE INVENTION Torque converters for automatic transmissions are usually
As shown in FIG. 1 of JP-A-63-246538, an inner gear 3 and an outer gear 4, which are pump elements, are housed in a space defined between a pump housing 1 and a pump cover 2. A torque converter sleeve 5 is connected to a pump impeller 7 of a torque converter 6 so as to rotationally drive this pump element. When the pump element is rotationally driven in the space, the pump operation is performed to supply the operating oil to the torque converter and the lubricating oil to the lubricating portion of the automatic transmission.

In particular, when supplying the hydraulic oil to the torque converter, as shown in FIG. 1, the oil housing is penetrated through the pump housing 1 and press-fitted into the pump cover 2 to fix the oil pump in the case, and the torque converter 6 is provided. An annular gap A formed by loosely fitting a torque converter sleeve 5 for rotationally driving a pump element on an outer peripheral portion of a stator shaft 8 to which a stator 9 as a constituent element is coupled via a one-way clutch 10 is used as an oil passage. It is being used.

An oil seal 11 for sealing the pump housing 1 and the torque converter sleeve 5 is provided on the outer peripheral portion of the torque converter sleeve 5.

[0005]

Since the hydraulic oil for the torque converter is required to have a high pressure and a large flow rate in terms of its function, a clearance (gap A) between the torque converter sleeve 5 and the stator shaft 8 is possible. It should be as large as possible.

However, if the clearance between the torque converter sleeve 5 and the stator shaft 8 is made large, the annular clearance formed between the torque converter sleeve 5 and the stator shaft 8 becomes a large play, so that the outer circumference of the stator shaft 8 is increased. Torque converter sleeve 5
At the time of assembly for loose fitting, between the inner peripheral portion of the torque converter sleeve 5 and the outer peripheral portion of the stator shaft 8 or between the inner peripheral portion of the pump housing 1 and the torque converter sleeve 5.
There is a problem that they interfere with each other at the outer peripheral portion of the above and it takes time for assembling work, and the oil seal 11 is damaged by the interference.

Therefore, when a guide portion is provided on the inner peripheral portion of the torque converter sleeve 5 to improve the workability in assembling, in the oil passage formed by the annular gap,
Since the hydraulic oil from the pump receives the oil passage resistance at the guide portion, conversely, there arises a problem that the hydraulic oil having a high pressure and a large flow rate is supplied to the torque converter, thereby failing to perform its original function.

The present invention has been made in view of the above problems, and reduces the oil passage resistance when the annular gap formed between the torque converter sleeve and the stator shaft is used for the oil passage, and at the same time, it is assembled. The purpose is to improve workability.

[0009]

To this end, a torque converter for an automatic transmission according to claim 1 of the present invention is a stator shaft in which a stator, which is a constituent element of the torque converter, is connected via a one-way clutch. An annular gap formed by loosely fitting a torque converter sleeve coupled to a pump impeller, which is an input element of the torque converter, is used in an oil passage for supplying hydraulic oil to the torque converter. In the torque converter having an oil seal provided on the outer peripheral portion thereof, a protruding portion provided on a part of the inner periphery of the torque converter sleeve is provided.

Further, in the torque converter for an automatic transmission according to a second aspect of the present invention, the protrusions are distributed and provided at a plurality of positions on the circumference of the inner peripheral portion of the torque converter sleeve. is there.

Further, in the torque converter for an automatic transmission according to a third aspect of the present invention, the protrusion is formed over the entire axial direction of the torque converter sleeve.

[0012]

In view of the above, the torque converter for an automatic transmission according to claim 1 of the present invention has an outer peripheral portion of a stator shaft to which a stator, which is a constituent element of the torque converter, is connected via a one-way clutch. , Supplying hydraulic oil to the torque converter using an annular gap formed by loosely fitting a torque converter sleeve coupled to a pump impeller, which is an input element of the torque converter, and assembling to the stator shaft. Is performed by using a protrusion protruding from a part of the inner circumference of the torque converter sleeve as a guide.

Further, in the torque converter for an automatic transmission according to a second aspect of the present invention, since the protrusions are provided at a plurality of positions on the circumference of the inner peripheral portion of the torque converter sleeve, the protrusions are provided on the stator shaft. The assembly is performed by using the plurality of protrusions as guides.

Further, in the torque converter for an automatic transmission according to a third aspect, the protrusion is formed over the entire axial direction of the torque converter sleeve.
An axial oil passage partitioned by the protrusion is formed in the oil passage formed by the annular gap. Further, the assembling to the stator shaft is carried out by using the projection formed over the entire axial direction as a guide.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 2 is a view showing a first embodiment of a torque converter for an automatic transmission according to the present invention. Reference numeral 1 is a pump housing, and 2 is a pump cover which is united with a pump housing 1 at a mating surface. The inner gear 3 and the outer gear 4, which are pump elements, are housed in the pump fitting recess 1p provided in the pump housing 1 so that the inner gear 3 and the outer gear 4 are externally meshed with each other, and the crescent 1C fills the gap. are doing.

Numeral 5 is a torque converter sleeve (oil pump drive shaft) which is connected to the inner gear 3 on the one hand and the pump impeller 7 which is an input element of the torque converter 6 on the other hand, and a projection E is provided on the inner peripheral portion thereof. . Reference numeral 8 denotes a stator shaft (fixed shaft) that penetrates the pump housing 1 and is press-fitted into the inner peripheral portion of the pump cover 2, and is spline-fitted with the one-way clutch 10 that is coupled to the stator 9 that is a component of the torque converter 6. There is. Also,
Reference numeral 11 is an oil seal that seals between the pump housing 1 and the torque converter sleeve 5.

FIG. 3 is a view showing the torque converter sleeve 5, and the protrusion E is provided in a part of the inner peripheral portion in the axial direction so as not to hinder the oil flow as much as possible, as shown in FIG.
In the cross-sectional direction, the torque converter sleeve 5 is provided at four locations on the inner peripheral portion thereof, as in the XX cross section of (a) shown in (b). At this time, the protrusion E may of course be provided in at least one place, but particularly when the protrusion E is provided in four places, the torque converter sleeve 5 can be stably assembled. Further, for example, when the torque converter sleeve 5 is provided at three locations, the processing of the torque converter sleeve 5 is easier than at four locations, and the stability at the time of assembly is good.

Here, the operation of the oil pump is shown in FIG.
It will be explained based on. The torque converter sleeve 5 which is rivet-fitted to the pump impeller 7 of the torque converter 6 and rotates the outer gear 4 which is internally meshed with the inner gear 3 is rotated by the torque converter sleeve 5 which constantly drives the engine, so that oil is pumped into the pump fitting recess 1p.
It is sucked into the pump and is regulated to a high pressure in a pump chamber formed in the meshing portion of the inner gear 3 and the outer gear 4 (crescent 1C), and then discharged to each portion as hydraulic oil or lubricating oil.

A part of the oil discharged by the oil pump is formed between the inner peripheral portion of the torque converter sleeve 5 and the outer peripheral portion of the stator shaft 8 by loosely fitting the torque converter sleeve 5 on the stator shaft 8. The hydraulic oil is supplied to the torque converter 6 via the oil passage A which is an annular gap. At this time, as apparent from FIG. 3B, the working oil can be supplied to the torque converter 6 by using the inner peripheral portion other than the protrusion E as an oil passage.

That is, in order to make the working oil flowing through the oil passage A have a high pressure and a large flow rate, the clearance between the inner peripheral portion of the torque converter sleeve 5 and the outer peripheral portion of the stator shaft 8 should be as large as possible in terms of dimensions. Pump housing 1 that occurs when the torque converter sleeve 5 is assembled
The interference with the oil seal 11 or the outer peripheral portion of the stator shaft 8 due to backlash is reduced, and the deterioration of the assembling workability and the damage of the oil seal 11 due to the interference are prevented.

Further, from FIG. 3B, since the protrusion E is formed along the circumferential direction of the inner peripheral portion, the pressure loss of the hydraulic oil occurs only in the protrusion E, as shown in FIG. The oil passage resistance generated in the hydraulic oil in the oil passage A is minimized.

FIG. 4 is a view showing a second embodiment of the torque converter for an automatic transmission according to the present invention, and the description of the same parts as those used in the first embodiment will be omitted. The structure and operation of the oil pump are similar to those of the first embodiment,
Is a different type of torque converter sleeve that is connected to the inner gear 3 on the one hand and to the pump impeller 7 on the other hand, and is provided with a protrusion F on the inner peripheral portion.

FIG. 5 is a view showing the torque converter sleeve 12, in which the projection F is projected over the entire inner peripheral portion so as not to obstruct the oil flow as much as possible in the axial direction, as shown by (a). In the cross-sectional direction, as shown in the (Y) cross section of (a) shown in (b), the torque converter sleeve 12 has four inner circumferential portions.
It is provided separately in each place. At this time, the protrusion F may of course be provided in at least one place, but particularly when the protrusion F is provided in four places, the torque converter sleeve 12 can be stably assembled. Also, for example, 3
When the torque converter sleeve 12 is provided in separate locations, the processing of the torque converter sleeve 12 is easier than at four locations, and the stability during assembly is also good.

By assembling the torque converter sleeve 12, a plurality of oil passages partitioned by the projections F are formed in the oil passage A between the torque converter sleeve 12 and the stator shaft 8. At this time, a part of the oil discharged by the oil pump can supply the working oil to the torque converter 6 by using the inner peripheral portion other than the protrusion F as an oil passage, as is clear from FIG. 5B. it can.

That is, in order to make the operating oil flowing through the oil passage A have a high pressure and a large flow rate, the clearance between the inner peripheral portion of the torque converter sleeve 12 and the outer peripheral portion of the stator shaft 8 should be as large as possible in terms of dimensions. Oil seal 11 of the pump housing 1 or the stator shaft 8 that occurs when the torque converter sleeve 12 is assembled.
This reduces interference with the outer peripheral portion of the rotor due to backlash, and prevents deterioration of assembly workability and damage to the oil seal 11 due to the interference.

Further, from FIG. 5 (b), the pressure loss of the hydraulic oil is generated only in the projection F, and the oil passage resistance generated in the hydraulic oil in the oil passage A shown in FIG. 4 is suppressed, and at the same time, as shown in FIG. 5 (a). As shown in (1), since the protrusion F constitutes the plurality of oil passages along the axial direction in the oil passage A, the oil passage resistance of the hydraulic oil is further reduced.

In this embodiment, the torque converter and the oil pump are arranged adjacent to each other and the torque converter sleeve is used as the oil pump drive shaft. However, for example, the speed change mechanism is provided between the torque converter and the oil pump. Can also be applied to a torque converter of an automatic transmission in which the oil pump is driven by an oil pump drive shaft separate from the torque converter sleeve.

[0028]

As described above, according to the first aspect of the present invention,
Since the torque converter of the automatic transmission according to the aspect of the invention is provided with the protruding portion protruding on a part of the inner circumference of the torque converter sleeve, the torque converter sleeve has an annular oil passage formed by loosely fitting the torque converter sleeve. When supplying hydraulic oil to the torque converter, while securing the clearance as large as possible so as to increase the high pressure and the flow rate, the oil passage resistance in the oil passage can be reduced only to the protrusions, and further, Assembly workability can be improved and at the same time,
It is possible to prevent damage to the oil seal.

Further, in the torque converter for an automatic transmission according to a second aspect of the present invention, since the protrusions are provided at a plurality of locations on the circumference of the inner peripheral portion of the torque converter sleeve, the pressure is increased and the flow rate is increased. While securing the clearance as large as possible, in that case, the protrusion can further reduce the play at the time of assembling, improve the assembling workability, and prevent the oil seal from being damaged. .

Further, in the torque converter for an automatic transmission according to a third aspect of the present invention, since the protrusion is formed over the entire axial direction of the torque converter sleeve, a plurality of oil passages along the axial direction are formed in the oil passage. Is configured to reduce the resistance in the oil passage, which is generated in other than the protrusion.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a torque converter of an automatic transmission according to a conventional technique.

FIG. 2 is a configuration diagram showing a first embodiment of a torque converter for an automatic transmission according to the present invention.

FIG. 3A is a diagram showing a torque converter sleeve in the same example. (B) is a XX sectional view of (a).

FIG. 4 is a configuration diagram showing a second embodiment of a torque converter for an automatic transmission according to the present invention.

FIG. 5A is a diagram showing another torque converter sleeve in the same example. (B) is a YY sectional view of (a).

[Explanation of symbols]

1 Pump Housing 2 Pump Cover 1C Crescent 1p Pump Fitting Depth 3 Inner Gear 4 Outer Gear 5 Torque Converter Sleeve (Oil Pump Drive Shaft) 6 Torque Converter 7 Pump Impeller 8 Stator Shaft (Fixed Shaft) 9 Stator 10 One-Way Clutch 11 Oil Seal 12 Torque converter sleeve (Oil pump drive shaft) A Oil passage E, F Projection

Claims (3)

[Claims] 1. A torque converter sleeve, which is connected to a pump impeller that is an input element of a torque converter, is loosely fitted to an outer peripheral portion of a stator shaft to which a stator that is a constituent element of the torque converter is connected via a one-way clutch. In a torque converter in which the formed annular gap is used as an oil passage for supplying hydraulic oil to the torque converter and an oil seal is provided on the outer peripheral portion of the torque converter sleeve, a part of the inner periphery of the torque converter sleeve is provided with a protrusion. A torque converter for an automatic transmission, comprising: 2. The torque converter for an automatic transmission according to claim 1, wherein the protrusions are provided at a plurality of locations on a circumference of an inner peripheral portion of the torque converter sleeve. 3. The torque converter for an automatic transmission according to claim 1, wherein the projection is formed over the entire axial direction of the torque converter sleeve.