JPH022115Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an impeller used in a torque converter, a fluid coupling turbine, or the like.

(Prior art) As shown in Fig. 1, the turbine impeller of a torque converter is generally constructed by attaching an inner circumferential annular portion (fixing portion 5) of a shell 3 to a turbine hub 2 connected to an output shaft 1 (only the center line is shown) using a rivet 6 or the like. The blade attachment part 8 (shell main body) of the shell 3 to which the blade 7 is attached is continuous with the fixed part 5 via a bent part 9. In such a structure, the bent portion 9 is bent toward the impeller side (the first
There is a risk of deformation to the right side in the figure). As a countermeasure to this problem, the thickness of the entire shell 3 is increased in conventional products. However, the attachment portion 8 and the like do not require much strength, and therefore, in conventional products, materials are wasted in the attachment portion 8, which has a large area, resulting in overlap and increased cost.

(Purpose of the invention) The purpose of the invention is to increase the strength of the shell by improving the shape of the shell, thereby solving the above-mentioned problems.

(Structure of the invention) The present invention provides an impeller in which the inner periphery of a blade attachment part to which a large number of blades are attached is continuous with an annular fixing part via a bent part, and the fixing part is fixed to a hub. A reinforcing bent rib extending in the radial direction is provided on the shell in a range including the bent portion, and a recess into which the rib fits is provided in the hub.

(Embodiment) In FIG. 2, a hub 2 connected to an output shaft 1 is provided with a flange 11 at an end on the pump impeller 10 side. A surface 12 of the flange 11 on the impeller 10 side is generally perpendicular to the output shaft 11, except for a recess 13 to be described later, and an annular fixing portion 15 on the inner circumference of the shell 3 is tightly fixed to the surface 12 by a plurality of rivets 14. It has been done. A bent portion 16 is provided on the outer periphery of the fixed portion 15 and is bent toward the opposite side of the impeller 10.
is formed, and the outer periphery of the fixed part 15 and the inner periphery of the attachment part 17 are continuous via the bent part 16. The attachment portion 17 is curved in an arc shape in the illustrated cross section including the center line of the output shaft 1, and the outer peripheral edges of the many blades 7 are attached to the concave surface on the impeller 10 side. The blades 7 are arranged in an annular shape along the circumferential direction of the shell 3, and the inner peripheral edge on the impeller 10 side is fixed to the core plate 20.

As shown in FIG. 3, which is a schematic view of a portion viewed from the - arrow in FIG. 2, a plurality of ribs 23 are formed on the shell 3 at intervals in the circumferential direction by squeezing. Each rib 23 has an elongated shape extending in the radial direction of the shell 3, and extends from the inner peripheral edge of the shell 3 through the fixed part 15 and the bent part 16 to the inner peripheral part of the attachment part 17.

In FIG. 2, the recess 13 of the flange 1 is formed to correspond to the size and shape of the rib 23,
The rib 23 fits into the recess 13 in a substantially tight state. The bottom of the rib 23 (the part indicated by the broken line) is inclined with respect to the output shaft 1, and the depth of the recess 13 (the length in the left-right direction in FIG. 2) increases toward the outer circumference of the flange 11. It's getting deeper. Further, the rivet 14 is attached to the flange 11 at a portion other than the recess 13.

(Function) Torque transmitted from the engine to the impeller 10 is transmitted from the blade 7 to the shell 3 via the internal hydraulic oil, and from the shell 3 to the hub 2 to the output shaft 1.
It is transmitted to In this operation, a load corresponding to the transmitted torque and a pressure difference within the torque converter are applied to the shell 3, and this load is concentrated on the bent portion 16, but since the bent portion 16 is reinforced by the squeezing rib 23, The bent portion 16 will not be deformed.

(Effect of the invention) As explained above, according to the invention, Ciel 3
Since the bent portion 16 is reinforced by the bending (squeezing) rib 23, sufficient strength can be given to the bent portion 16 and deformation of the bent portion 16 can be prevented. In other words, since the strength of the bent portion 16 is increased by the ribs 23, there is no need to increase the thickness of the shell 3, which prevents the use of unnecessary materials in the mounting portion 17, etc., and reduces weight and cost. Can be done. Also, a rib 23 is provided in the recess 13 of the flange 11.
Since it is inserted, it is possible to prevent the overall size from increasing.

(Modification) In the structure shown in FIG. 4, the bottom 25 of the rib 23 and the bottom of the recess 13 are made flat and approximately perpendicular to the output shaft 1,
A bottom portion 25 is fixed to the bottom surface of the recess 13 by a rivet 14.

In the structure shown in FIG. 5, each rib 23 has a generally fan-shaped shape with the inner circumferential edge of the shell 3 at its center.

In the structures shown in Figures 3 and 5, adjacent rivets 1
One rib 23 is formed between each rivet 1 and 14, but in the structure shown in FIG.
Two ribs 23 are formed between the ribs 14.
Furthermore, the ribs 23 in FIG. 6 do not reach the inner periphery of the shell 3, but extend from the radially intermediate portion of the fixed portion 15 to the inner periphery of the attachment portion 17.

[Brief explanation of drawings]

Fig. 1 is a schematic cross-sectional view of the conventional example, Fig. 2 is a schematic cross-sectional view of the embodiment of the present invention, and Fig. 3 is a schematic cross-sectional view of the conventional example.
4 is a schematic cross-sectional view of another embodiment; FIG. 5 is a schematic front view of another embodiment;
FIG. 6 is a schematic front view of another embodiment. 2...
...Hub, 3...Ciel, 13...Recess, 15...
Fixed part, 16...Bending part, 17...Mounting part,
23...Rib.

Claims (1)

[Scope of utility model registration request] In an impeller in which the inner periphery of a blade attachment part to which a large number of blades are attached is continuous to an annular fixed part via a bent part, and the fixed part is fixed to a hub, a reinforcing fold extending generally in the radial direction of the shell is used. An impeller characterized in that a bending rib is provided on the shell in a range including the bending portion, and a recess into which the rib fits is provided in the hub.