JP2796004B2 - Automobile clutch hub and clutch hub processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clutch hub which is a component of an automatic transmission for a motor vehicle, and more particularly to a clutch hub having an oil sump for supplying sufficient lubricating oil to a wet clutch. The present invention relates to a method for processing a clutch hub.

[0002]

2. Description of the Related Art A clutch for an automobile is provided between an input shaft and an output shaft and intermittently connects a torque. A clutch hub is one component of a wet multi-plate clutch. As shown in FIG. 11, the clutch hub has external teeth 4 on an outer surface of a cylindrical hub body 3 having an inner flange 2 formed thereon.
Are formed in the cylindrical portion, and a large number of holes 5 are formed in the cylindrical portion. A donut-shaped clutch plate 7 of a wet multi-plate clutch is disposed outside the cylindrical portion of the clutch hub, and the lubrication inside the cylindrical portion is caused by centrifugal force due to the rotation of the clutch hub, as shown by the arrow in FIG. Oil 8 is supplied through the hole 5. By the action of the oil sump 6, it is possible to prevent the lubricating oil 8 from flowing out from the opening of the cylindrical portion during rotation of the clutch hub, and the lubricating oil 8 becomes a substantially uniform film on the entire inner side of the clutch hub. As a result, sufficient lubricating oil 8 can be efficiently supplied to the clutch 7 plate through the hole 5.

[0003]

However, in the conventional clutch hub described above, the inside of the clutch hub before machining is shown in FIG.
The oil sump weir 6 is cut from the position indicated by the symbol L.
This is problematic in that it takes a long time to process, and the cutting powder is discarded, so that the material is wasted and the cost increases.

In order to solve this problem, the present applicant has proposed Japanese Patent Application No. 2-187131. As shown in FIG. 12, the inner peripheral edge of the open end of the cylindrical portion a on which the external teeth are formed is crushed in the axial direction by a punch b so that an oil sump c is formed.
However, there is a new problem that the cylindrical portion a is distorted when being crushed, the roundness is impaired, and the accuracy may be deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and has as its object to form a clutch hub which is inexpensive, has a small thickness, has a high roundness, and an oil sump which has a small waste of material. It is an object of the present invention to provide a working method of a clutch hub which can be performed.

[0006]

To achieve the above object, in the clutch hub according to the first aspect, an inner flange is formed at one open end of the cylindrical portion, and external teeth are formed on an outer surface of the cylindrical portion. In a clutch hub in which an oil sump weir is provided around the inside of the cylindrical portion opening end of the clutch hub body, the outside of the cylindrical portion opening end is cut to be thin, and the thin portion is radially inward. This is done by a plastically deformed overlay that has been crushed and raised.

According to a second aspect of the present invention, a clutch hub body having an inner flange formed at one opening end of a cylindrical portion and outer teeth formed on an outer surface of the cylindrical portion is rotated about a longitudinal axis. While rotating, cut the outside of the open end of the cylindrical portion to make the inner peripheral edge of the open end thinner, and press the outer surface of the thinner portion with a rotating roller-like pressing tool to make the thinner portion radially inward. It is plastically deformed and is provided around the oil sump weir inside the open end of the cylindrical portion.

In the clutch hub according to the present invention, an inner flange is formed at one open end of the cylindrical portion, and an oil reservoir is formed inside the open end of the cylindrical portion of the clutch hub body having external teeth formed on the outer surface of the cylindrical portion. In the clutch hub around which a weir is provided, the oil sump weir is formed by a plastically deformed build-up part in which an inner peripheral corner at the opening end of the cylindrical part is crushed obliquely outward in the radial direction and rises. is there.

According to a fourth aspect of the present invention, a clutch hub body having an inner flange formed at one open end of a cylindrical portion and external teeth formed on an outer surface of the cylindrical portion is rotated about a longitudinal axis. Then, the inner peripheral edge of the opening end of the cylindrical portion is crushed obliquely outward in the radial direction by a rotary roller-shaped pressing tool so as to surround the oil sump inside the opening end of the cylindrical portion.

[0010]

According to the first and second aspects, the outer surface of the thin portion formed on the inner peripheral edge of the opening end of the cylindrical portion is pressed radially inward by the rotary roller-shaped pressing tool while rotating the clutch hub body about the longitudinal axis. Then, the thin portion is easily plastically deformed inward in the radial direction and rises, and the rise portion serves as an oil sump weir.

According to the third and fourth aspects of the present invention, when a rotating roller-like pressing tool is pressed against the inner peripheral edge of the cylindrical opening while rotating the clutch hub body about the longitudinal axis, the corner is plastically deformed. The portion rises inward in the radial direction, and this rise serves as an oil sump weir.

[0012]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 show one embodiment of the present invention. FIG. 1 is a longitudinal sectional view of a clutch hub, FIG. 2 is a longitudinal sectional view of a clutch hub body which is a main part of the clutch hub, and FIG. FIG. 4 is a schematic diagram of a processing device for forming an oil sump weir on a main body, and FIG.

In these figures, reference numeral 10 denotes a clutch hub main body. An inner flange 13 is formed at one open end of a cylindrical portion 12, and external teeth 14 are formed on an outer surface of the cylindrical portion. The cylindrical portion 12 is provided with a number of small holes 15 for supplying lubricating oil to a wet multi-plate clutch disposed outside the cylindrical portion. An oil sump 16 which is crushed inward in the radial direction and is plastically deformed and rises is provided around the inside of the opening end of the cylindrical portion. Reference numeral 18 denotes a holding cylinder having a spline 19 formed on the outer peripheral surface of a shaft portion. The flange 18a of the holding cylinder 18 is welded to the inner flange 13 of the clutch hub body 10 to be integrated as a clutch hub.

FIG. 3 shows an outline of the weir processing apparatus. Reference numeral W denotes an original shape (hereinafter referred to as a work) of a clutch hub body before forming an oil sump weir, and an oil sump weir 16 is formed. It has substantially the same shape as the clutch hub body 10 except that it is not provided. Reference numeral 22 denotes a lathe main shaft (rotary drive shaft) 20.
The work W is gripped by the chuck 22 and rotates integrally with the main shaft 20 (rotates around the longitudinal axis L). Reference numeral 24 denotes a cutting tool provided to face the chuck 22, which can slide in the direction of approaching and separating from the chuck 22. Reference numeral 26 is a rotary roller shaped pressing processing tool that was inclined state with respect to the spindle 20 of lathe rotation shaft L _1, has a structure that can slide in the approaching separating direction with respect to the shaft 20.

Next, a method for processing an oil sump weir on the work W will be described with reference to FIGS. First, as shown in FIG. 3, the work W is chucked by the chuck 22, and the spindle 20 is rotated at a constant speed. Next, the outside of the open end of the cylindrical portion of the work W is cut by the cutting tool 24 to make the open end thin. Reference numeral 12a indicates a thin portion. Next, as shown in FIG. 4, the press processing tool 26 is pressed against the outer surface of the thin portion 12 a to plastically deform the thin portion 12 a inward in the radial direction, and a built-up portion 12 b is provided around the inner peripheral edge of the cylindrical portion. An oil sump weir 16 is formed as shown in FIG.

The thin portion formed on the inner peripheral surface side of the opening end of the cylindrical portion of the work W by cutting using a cutting tool is denoted by reference numeral 1 in FIG.
2c or 12d shown in FIG. In the thin portion 12d shown in FIG. 6, the cutting portion 12e is also formed on the inner peripheral surface side of the cylindrical portion 12, so that the thin portion 12d can be easily plastically deformed. Reference numerals 12c ₁ and 12d ₁ in FIGS. 5 and 6 denote an oil sump which is a built-up portion formed by plastically deforming the thin portions 12c and 12d, respectively, using the weir processing apparatus shown in FIGS. .

FIGS. 7 and 8 show a second embodiment of the present invention. FIG. 7 is a partially enlarged sectional view of a clutch hub body.
FIG. 3 is a diagram showing a method of processing a weir. In the clutch hub according to the second embodiment, the inner peripheral corner 12f of the opening end of the cylindrical portion 12 of the clutch hub body 10 is crushed radially outward, and at this time, a part that has been plastically deformed bulges radially inward. It has become a weir 12f _1. In order to machine the oil sump weir shown in the second embodiment, as shown in FIG. 8, the clutch hub main body 10 is chucked by the chuck 22 shown in the first embodiment, and is rotated at a constant speed. The pressing tool 26 is pressed against the inner peripheral edge 12 f of the opening end to crush the corner 12 f to form a built-up portion (weir) 12 f ₁ .

[0018] As shown in FIG. 9 codes 12g, cutting the open end inside the cylindrical portion 12 (inner region of the external teeth 14), so as to form a weir 12h ₁ by crushing the inner peripheral corner portion 12h You may. When using the clutch hub,
As shown in FIG. 10, a piston P for pressing the wet-type multi-plate clutch is provided on the open end side of the clutch hub. The piston P slides in the direction of the axis L. ₁ is formed at a position deeper than the opening edge of the cylindrical portion of the clutch hub body 10, the weir 12
there is an advantage in that h ₁ is less likely to contact with the piston P.

[0019]

As is apparent from the above description, according to the clutch hub according to the first aspect and the clutch hub processing method according to the second aspect, the cutting and cutting of the open end of the cylindrical portion of the clutch hub body. Can be continuously performed without re-chucking the clutch hub body, so that the processing time is short and concentricity is improved. Further, since the thin-walled portion is plastically deformed and rises to become an oil sump weir, the amount of cutting is smaller than that of the conventional cutting method, so that waste is reduced. In addition, plastic deformation of the thin portion can be easily performed with a small force using a device such as a lathe and a pressing tool, and a high quality product can be obtained because the cylindrical portion is not affected by distortion.

Further, the material can be saved, and particularly, the plate thickness can be reduced, so that the weight of the clutch hub can be reduced, which contributes to the reduction of the inertial load with respect to the rotational torque and the reduction of the total weight of the vehicle body. Further, according to the clutch hub according to the third aspect and the method of processing the clutch hub according to the fourth aspect, in addition to the effects of the first and second aspects, a weir can be formed without forming a thin portion. Therefore, the number of processes can be reduced accordingly. In addition, since there is no cutting part, it is excellent in terms of material saving.

[Brief description of the drawings]

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

FIG. 2 is a sectional view of a clutch hub main body, which is a main part of the clutch hub.

FIG. 3 is a schematic diagram of a processing device for a clutch hub.

FIG. 4 is an explanatory view showing a state where an oil sump is being processed by the same device.

FIG. 5 is a cross-sectional view of a main part of the clutch hub body according to another embodiment at the time of processing the oil reservoir weir.

FIG. 6 is a cross-sectional view of a main portion of a clutch hub body according to another embodiment during processing of an oil sump weir.

FIG. 7 is a longitudinal sectional view of a main part of a clutch hub body according to still another embodiment of the present invention.

FIG. 8 is an explanatory view of a method of processing the oil sump weir shown in FIG. 7;

FIG. 9 is a longitudinal sectional view of a main part of a clutch hub body according to still another embodiment of the present invention.

FIG. 10 is a sectional view around a clutch hub.

FIG. 11 is a cross-sectional view illustrating a main part of a conventional clutch hub.

FIG. 12 is an illustration of a previously proposed processing method.

[Explanation of symbols]

10 clutch hub body 12 the cylindrical portion _{12b, 12c 1, 12d 1,} 12f 1 oil reservoir built-up portion 13 in the flange 14 outer teeth 16 oil constituting the dam reservoir dam 20 lathe of main spindle (rotary drive shaft) 22 chuck 26 rotates roller Pressing tool

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F16D 11/00-25/14 F16H 63/30 B21H 1/00 B21K 1/30 B21K 1/40

Claims (4)

(57) [Claims] 1. A clutch hub in which an inner flange is formed at one opening end of a cylindrical portion, and an oil sump is provided around the inside of the opening end of the cylindrical portion of a clutch hub body having outer teeth formed on an outer surface of the cylindrical portion. A clutch hub, wherein the oil sump weir is a plastically deformed build-up portion in which the outside of the open end of the cylindrical portion is cut to be thin, and the thin portion is crushed inward in the radial direction to be raised. 2. A method of cutting the outside of an opening end of a cylindrical portion while rotating a clutch hub body having an inner flange formed at one opening end of a cylindrical portion and external teeth on an outer surface of the cylindrical portion around a longitudinal axis. The inner peripheral edge of the opening end is made thinner, and the outer surface of the thinner part is pressed with a rotating roller-like pressing tool, and the thinner part is plastically deformed radially inward to form an oil sump inside the cylindrical part opening end. A method of processing a clutch hub, wherein the clutch hub is provided around the periphery. 3. A clutch hub in which an inner flange is formed at one open end of a cylindrical portion, and an oil sump is provided around an inner side of the open end of the cylindrical portion of the clutch hub body having outer teeth formed on an outer surface of the cylindrical portion. A clutch hub, wherein the oil sump weir is a plastically deformed build-up portion in which an inner peripheral corner at an opening end of a cylindrical portion is squashed obliquely outward in a radial direction and rises. 4. A rotating roller-shaped pressing tool, while rotating a clutch hub body having an inner flange formed at one open end of the cylindrical portion and external teeth formed on an outer surface of the cylindrical portion around a longitudinal axis. A clutch hub for an automobile and a method of processing a clutch hub, wherein an oil sump weir is provided inside an opening end of a cylindrical portion by crushing an inner peripheral corner portion of the opening end obliquely outward in a radial direction.