JPH07133830A - Clutch hub - Google Patents

Abstract

PURPOSE:To prevent generation of defective deformation on a tooth of a spline even when an oil reservoir weir is formed on the spline of narrow tooth width. CONSTITUTION:A spline 5 is constituted by forming a cylindrical part 2 of a bottomed cylindrical clutch hub in an irregular shape, and a rectangular oil passage 6 is properly drilled on the spline 5. An oil reservoir weir 9 is formed on an opening end side top point part inner peripheral side 7 of a tooth 5a of the spline 5 with this passage 6 drilled. This oil reservoir weir 9 is formed by pressing the opening end side top point part inner peripheral side 7 by a round bar type pin and partially plastic deforming it. When the clutch hub is rotated and flow of oil toward the opening end side of the spline 5 in caused by receiving work of centrifugal force, the flow of oil is blocked by the oil reservoir weir 9, the oil is made to pass the oil passage 6 and a frictional engagement surface of a clutch plate, etc., is lubricated by the oil.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch hub used for a wet multi-plate clutch or the like.

[0002]

2. Description of the Related Art As shown in FIG. 5, a clutch hub 1a of this type is disposed inside a cylinder member 12 which is connected to a driven side rotating portion 10 via a spline 11, and an inner peripheral end portion of which is an input shaft. It is connected to 13 to form a part of the wet multi-plate clutch 14.

The clutch hub 1a has a cylindrical portion 15
To a spline 16, a plurality of clutch plates 17 are engaged with the spline 16 so as to be movable in the axial direction, and the clutch plate 18 engaged with the spline 11 of the cylinder member 12 so as to be movable in the axial direction. The clutch plates 17 are alternately arranged. And
Wet multi-plate clutch 14 using this clutch hub 1a
When the piston 19 provided in the cylinder member 12 is driven to frictionally engage the two clutch plates 17 and 18 or release the frictional engagement between the two, the clutch hub 1a is connected to the input shaft 13 side. The torque is transmitted to the driven side rotating portion 10 or the torque transmission is cut off.

FIG. 6 shows the spline 16 of the clutch hub 1a.
It is a figure which shows the detail of. As shown in this figure, the teeth 16a of the spline 16 of the clutch hub 1a are properly connected to the oil passage 2
No. 0 is bored, and the clutch hub 1a allows the oil stored on the back surface of the tooth 16a to pass through the oil passage 20 due to the centrifugal force generated by the rotation of the clutch hub 1a, and the friction engagement surfaces of the clutch plates 17 and 18 shown in FIG. It is supposed to lead to.

Further, the clutch hub 1a is provided with an oil passage 20.
The oil reservoir weir 22 is press-molded on the open end side of the teeth 16a of the spline 16 provided with to prevent the oil from flowing out to the open end side of the clutch hub 1a, and most of the oil passes through the oil passage 20. In this way, the friction engagement surface is devised so as to be effectively lubricated (for example, Japanese Patent Laid-Open No. 62-21042).
No. 0 publication).

[0006]

By the way, in recent years, automatic transmissions of automobiles tend to be downsized and have higher torque. Therefore, in order to downsize the clutch hub and secure the clutch torque, there are many cases. What has teeth is required. The conventional clutch hub 1a has a spline 16
Since the opening end side of the tooth 16a of the spline 16 is pressed by a press from the outside in the radial direction to partially plastically deform the tooth 16a of the spline 16 to form the oil reservoir weir 22, the tooth width of the spline 16 is wide. However, if it is applied to a tooth 16a module having a small module spline 16 such as 3 or less that meets the above requirements, the press die forming the oil reservoir weir 22 becomes small, and the press die This causes a problem in mold durability. Further, in order to solve such a problem, as shown in FIG. 7, if the oil reservoir 22 is formed over the entire width of the teeth 16a of the spline 16, the durability of the press die is improved, but the spline 16 The tooth 16a is deformed badly, and there arises a new problem that the clutch plate 17 cannot be assembled to the spline 16 from the opening end side of the clutch hub 1a.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide a clutch hub capable of easily forming an oil reservoir weir even on a spline having a narrow tooth width.

[0008]

The present invention has been devised in order to achieve the above-mentioned object, and a side wall (3) is provided at one end of the cylindrical portion (2), and the cylindrical portion (2) is uneven. A clutch hub (1) which is formed into a spline (5) and has an oil passage (6) appropriately bored in a tooth (5a) of the spline (5), wherein the oil passage (6) is formed. Opening end side apex inner peripheral side (7) of teeth (5a) of perforated spline (5)
Is partially plastically deformed by press molding from the axial direction of the spline (5) to form the oil reservoir weir (9).

The reference numerals in parentheses are for comparison with the drawings, but do not limit the structure of the present invention in any way.

[0010]

As is apparent from the above description, according to the present invention, the portion forming the oil reservoir weir is the inner peripheral side of the top end side of the spline teeth, and the portion that is plastically deformed is small. The oil reservoir weir can be easily formed with a small load, and even when the oil reservoir weir is formed on the teeth of a small module, the durability of the press tool (pin) does not decrease, and moreover, Does not cause bad deformation of spline teeth.

As a result, even in a clutch hub that is compact and can carry high torque, reliable lubrication can be ensured by an accurate oil reservoir weir.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a sectional view of a clutch hub 1 showing an embodiment of the present invention. This clutch hub 1 is pressed into a shape having a cylindrical portion 2 and a side wall 3 at one end thereof so as to have a substantially bottomed cylindrical shape, and a hole 4 for engaging another member is formed at the center of the side wall 3. Has been formed.

As shown in detail in FIGS. 2 to 4, the cylindrical portion 2 is formed into a concavo-convex shape as a whole to form a spline 5,
The teeth 5a of the spline 5 are appropriately bored with a rectangular oil passage 6. Then, the spline 5 with the oil passage 6 drilled
A toothed rod 5a of the spline 5 is formed by pressing a round rod-shaped pin 8 as a processing tool from the axial direction of the spline 5 on the inner peripheral side 7 of the tooth 5a by a press to plastically deform a part thereof. An oil reservoir weir 9 is formed so as to partially close the inner peripheral side 7 of the open end side of 5a.

The pin 8 has a thickness corresponding to the module of the tooth 5a of the spline 5. Therefore, a pin 8 having a small diameter tip is used for the tooth 5a of the small module, but the tip portion having the small diameter may be slightly longer than the pushing depth d, and except for the tip portion having the small diameter. Since it can be reinforced, the durability of the pin 8 does not become a problem.

When the clutch hub 1 thus formed is incorporated into an automatic transmission and rotated as described above (see FIG. 5), the opening of the spline 5 is transmitted by the centrifugal force through the side wall 3 and the spline 5. The oil flowing toward the end side is blocked by the oil reservoir weir 9, and the oil is passed through the oil passage 6 and supplied to the friction engagement surfaces of the clutch plates 17 and 18 (see FIG. 5). Effectively lubricates the friction engagement surfaces of 18.

As described above, in this embodiment, the inner peripheral side 7 of the teeth 5a of the spline 5 on the open end side is partially plastically deformed to form the oil reservoir weir 9. Since the portion to be deformed is small, it can be plastically deformed with a small load, and the oil reservoir weir 9 can be formed without affecting the outer shape of the tooth 5a of the spline 5.

Therefore, according to this embodiment, there is no defective deformation of the teeth 5a of the spline 5 due to the formation of the oil reservoir weir 9, and the clutch plate (not shown) is assembled from the open end side of the spline 5. You can

In this embodiment, the rectangular oil passage 6 is bored in the spline 5, but the oil passage 6 may be round, oval or the like.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a clutch hub according to an embodiment of the present invention.

FIG. 2 is a perspective view of a main part of the clutch hub.

FIG. 3 is a front view partially enlarging a spline of the clutch hub.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a partial sectional view of an automatic transmission using a conventional clutch hub.

FIG. 6 is a perspective view of a main part of a conventional clutch hub.

FIG. 7 is a perspective view of a main part of a clutch hub showing another conventional example.

[Explanation of symbols]

 1 Clutch Hub 2 Cylindrical Part 3 Sidewall 5 Spline 5a Teeth 6 Oil Passage 7 Open End Side Top Inner Circumference Side 8 Pin 9 Oil Retainer

Claims (1)

[Claims] 1. A clutch hub having a side wall at one end of a cylindrical portion, wherein the cylindrical portion is formed into a concavo-convex shape to form a spline, and an oil passage is appropriately bored in a tooth of the spline, wherein the oil passage is bored. A clutch hub characterized in that an oil reservoir weir is formed by partially plastically deforming the opening end side apex inner peripheral side of the spline teeth from the axial direction of the spline by press molding.