JPS5936743Y2 - friction clutch - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a cover for a friction clutch for an automobile.

Prior Art In a conventional automobile friction clutch, the clutch driven plate is sandwiched between the flywheel of the internal combustion engine and the pressure plate, and the pressure plate itself moves in the axial direction relative to the clutch cover. It is fixed to the annular clutch cover so that it can rotate and hang as a unit.

The cover is secured to the flywheel and a spring device or diaphragm causes the spring to act between the cover and the pressure plate to create a force to clamp the driven plate between the flywheel and the pressure plate.

By removing the force exerted on the pressure plate of the spring device, the driven plate is released.

In diaphragm spring type clutches, the force is removed by either pushing the radially inner end of the protrusion of the diaphragm spring in one direction or by pulling the end of the protrusion in the opposite direction to the flywheel. Depending on the method, it is determined by the structure of the clutch.

In addition, the design of the cover is determined by the structure of the clutch.
For example, a multi-disc clutch has a deeper cover than a single-disc clutch.

If the depth of this cover is deep, it will be difficult to press out the cover of this type of clutch from a single sheet of steel using a press, and material will be wasted.

Therefore, in order to manufacture the side wall part of such a cover, a ring is formed by machining from a steel plate or bar material, and a shallow press-formed product is attached to this ring with bolts to create a cover of the required depth. It is known that

It is the spacing and stability provided by the machined rings that provide solid support for the annular cover when the cover is attached to the flywheel and the bolts are tightened.

Additionally, the size of the pressure plate used within the cover is limited by the width of the ring required to provide the necessary support.

Purpose of the invention Therefore, the present invention does not require machining and can produce component parts only by press working, has a deep cover, can be used for multi-disc clutches, and is simple. The purpose of the present invention is to provide a cover for an automobile friction clutch having a convenient structure.

Structure of the Invention The structure of the present invention is to provide a cover for a friction clutch for an automobile, which has an annular cylindrical side wall and an inwardly protruding annular rim fixed to one end of the cylindrical side wall, and the cylindrical side wall has a curved band. The ring is made of steel and has a portion pressed radially inward to support the annular rim radially inside the ring, and the annular rim has holes for bolts for attaching the cover to the flywheel. It is characterized in that it has adjacent to the radially inwardly pressed portion.

Effects of the invention As mentioned above, in this invention, the cylindrical side wall is formed by a curved steel ring, so the component parts can be made by press working without the need for machining, and therefore the cover can be manufactured easily and economically. It can be applied to the cover of a multi-disc clutch because it can create a deep cover, and ventilation holes can be easily punched in the ring, and the ring can be pressed radially inward. Since the bolt holes are formed adjacent to this part, the peripheral edge of the cover will not be deformed by tightening the bolts when the cover is fixed to the flywheel, and the annular rim can be held in place against the cylindrical side wall. The cover can be firmly attached to the flywheel without causing distortion of the spring force of the diaphragm spring due to deformation over time.

Example The invention will now be described by way of example with reference to the accompanying drawings.

Clutch cover assemblies are well known and will only be described in sufficient detail to understand the operation of the present invention.

In FIGS. 1, 2, and 3, the cover for a tension clutch includes a cover 11 attached to a flywheel 13 of an internal combustion engine of an automobile by bolts 12, a pressure plate 15, and a cover 11 and a pressure plate 15. and a diaphragm spring 14 which acts to press the pressure plate 15 toward the flywheel 13.

The driven plate 16 is moved by the pressure plate 15 due to the force generated by the spring 14.
and the flywheel 13, and is splined to the input shaft of a gear box (not shown).

The pressure plate 15 is fixed so as to rotate with respect to the cover by four drive pieces 17 arranged so as to be divided into four equal parts. is allowed to move axially.

In one embodiment of the present invention, the cover 11 comprises an annular cylindrical side wall 18 formed by rolling a piece of steel plate into an annular shape and welding the adjacent ends 19 thereof.

The cylindrical side wall 18 has four wall recesses 20 pressed radially inward and arranged so as to divide the circumference into four equal parts. It serves to support the annular rim 22 projecting towards the radially inner side of the annulus.

When attaching the cover 11 to the flywheel and screwing in the bolts 12, the bolts 12 are inserted into the recesses 20 on the wall surface.
The recessed portion supports the portion of the rim 22 proximate to the bolt 12.

The inwardly protruding annular rim 22 is comprised of four arcuate members 23 each formed by bending a piece of steel plate, each of which has a different shape when assembled on the cylindrical side wall 18.
Draw an arc of approximately 90° so that a slight gap 24 remains between the two.

The recessed portions 20 of the side walls all have the same circumferential length.

When the member 23 is arranged so that the gap 24 coincides with the center of the recessed portion 20, each end 25 of the arc-shaped member 23 is
It is of sufficient length to be supported by the recessed portions 20 of the inwardly pressed side walls 18.

The radially outer circumferential portion 26 of each arcuate member 23 is substantially perpendicular to the annular side wall 18 and has a ramp 27 across its entire width that slopes away from the flywheel.

Also, the radially inner circumferential portion 28 is parallel to the outer circumferential portion 26.

The radially inner portion 28 holds a fulcrum ring 29 between the cover 11 and the diaphragm spring 14 and provides a pivot point as the diaphragm spring 14 moves relative to the cover 11.
- acts as

Each arcuate member 23 has three recesses 21 pressed in such a way that the radially outer surface of its inclined portion 27 is obtained;
There are one indentation at each end 25 and one in between, and each indentation has a flat part 32 perpendicular to the side wall 18, which flat part is half the width of the arc member 23 in the radial direction. occupies .

This flat part extends to the outer circumferential part 26, and supports the arcuate member 23 radially inwardly when the member 23 hits the recessed part 20 of the wall surface, and when the cover 11 is attached to the flywheel 13, the bolts 12 are tightened. It functions as a flat surface for screwing, and also functions as a flat surface for attaching the drive piece 17 to the flywheel side of the member 23 of the cover 11 with the rivet 31.

Four arcuate members 23 are welded to the cylindrical side wall.

The base of the cylindrical side wall surface adjacent to the flywheel 13 may also be stepped to facilitate positioning of the flywheel.

4, 5 and 6, the clutch cover assembly is shown as cover 51. Pressure plate 54 and cover 5
1 and a pressure plate 54, which in use biases the pressure plate 54 towards the flywheel of the internal combustion engine (see FIG. 2).

The cover 51 is a cylindrical structure in which two curved steel semicircular arcuate members 53 are welded to form a steel plate ring band and are arranged with their longitudinal axes along the circumferential wall of the cover 51. an annular rim 57 consisting of a shallow steel stamping welded to one end of the cylindrical side wall 52;
This includes:

In order to facilitate the welding of the annular rim 57, four holes are provided at one end of the side wall 52 that are inclined radially inward to allow welding at two points and support the annular rim 57 on the radially inner side. A section 58 is provided (see FIG. 6).

These welding points provided by the sloped portion 58 of the side wall are located one at each of the four radial recesses 59 of the side wall 52.

Another radially recessed portion 61 of the side wall 52 is provided as necessary to support the annular annular rim 57.

Bolt 60 at recessed portion 59 or another recessed portion 61
When the cover assembly is installed on a motor vehicle flywheel, the recessed portion 59 or 61 provides support for the annular rim 57 and receives the bolt 12 therein over the entire width of the side wall 52, thereby providing a pressure plate. of the largest dimension is received within the cover 51.

This advantage also applies to the cover shown in FIG.

Combining the features of the covers shown in FIGS. 1 and 4, the clutch cover is fabricated from a sheet metal annulus formed from a number of welded parts and attached to the rim in a single piece as shown in FIG. It will be appreciated that a stamping of 1,000,000 or a number of spaced apart arcuate members as shown in FIG. 1 may be used.

Although the number of spaced arcuate members has been shown as four for convenience, it will be clear that this number may be any convenient number.

Although all of the clutch cover assemblies illustrated and described herein are for pull-type clutches, this type of construction is equally suitable for covers for push-type clutches.

As an alternative method of obtaining the required cover depth, this type of construction is also used to fabricate spacer rings for use with conventional pressed annular covers.

In FIGS. 1 and 4, the annular side walls 18 and 52, respectively, are formed from a steel strip and have an annular rim adjacent thereto located at the end of the annulus remote from the flywheel, as shown in FIG.

The annular rim thus formed serves as a flat surface for mounting the cover of a conventional clutch.

The annular side wall 18 of the annulus acts as a spacer member between the flywheel and the cover of the clutch.

When fabricating the annular annular wall described above, the ends 19 of the annular or semicircular member 53 may alternatively be formed into overlapping portions 85 and 86 of half their width, as shown in FIG.
, which is fitted with a dowel to connect each portion 85 and 86.
is received within the annulus, overlapping a portion of the main wall of the annulus.

Holes 82 and 84 at ends 85 and 86 with dowel holes
are aligned with holes 83 and 81 in the main wall of the annulus, respectively, as shown in FIG. 8, so that the holes are not obstructed when the completed annulus wall is formed.

At this time, rivets are passed through matching holes 82 and 83 and 81 and 84.

Furthermore, although it is not shown in the drawing, a small piece is attached to the press-formed product shown in Fig. 4, a rivet hole is provided in it, and the press-formed product is attached to the ring by making it coincide with the hole in the wall of the ring. It can also be riveted to the wall.

[Brief explanation of drawings]

Fig. 1 is a cover assembly diagram using an example of the shape of the clutch cover according to the present invention, and Fig. 2 is a sectional view taken along line II-II in Fig. 1, showing the cover assembly attached to a flywheel of an automobile. The figure shown in Figure 3 is the line III-III in Figure 1.
4 is a drawing of another embodiment of the present invention, and FIG. 5 is a sectional view taken along the line ■-V of FIG. 4, in which the cover of FIG. 4 is attached to a flywheel of an automobile. 6 is a sectional view taken along the line VI-VI in FIG. 4, and FIG. 7 is a view showing the end of the steel band ring before being fixed to the rivet.
FIG. 8 is a diagram showing the state after the ring band shown in FIG. 7 has been riveted. 12, 60... Bolt, 13... Flywheel, 18.52... Cylindrical side wall, 20.61
...Concave part, 22.57 ...Annular rim, 23 ...Archive member, 24 ...Gap, 53 ...Semicircular arc shape Element.

Claims (6)

[Scope of utility model registration request] (1) A cover for a friction clutch for an automobile, comprising an annular cylindrical side wall 18.52 and an inwardly projecting annular rim 22.57 fixed to one end of said cylindrical side wall. comprises a curved steel annulus and has a portion 20.58 pressed radially inwardly to support said annular rim radially inwardly of the annulus, and said annular rim presses the cover against a flywheel; A cover for a friction clutch for an automobile, characterized in that the cover has a hole for a bolt 12 adjacent to the radially inwardly pressed portion for attachment to the cover. (2) Utility Model Registration A cover for a friction clutch for an automobile according to claim 1, in which the cylindrical side walls 52 are made of a plurality of curved steel bands welded together to form a steel plate ring. A cover for a friction clutch for an automobile, characterized by comprising an arc-shaped member. (3) Scope of Utility Model Registration The cover for a friction clutch for an automobile according to claim 1, wherein the cylindrical side wall 18 is made by rolling a steel band into an annular band shape. . (4) Scope of Utility Model Registration Claims The cover for a friction clutch for an automobile according to any one of claims 1 to 3 is characterized in that the annular rim 57 is made as an annular pressed product. Automotive friction clutch cover. (5) Scope of Utility Model Registration In the cover for a friction clutch for an automobile according to any one of claims 1 to 3, the annular rim 22 protruding inward includes a plurality of arc-shaped members 2.
3. A cover for a friction clutch for an automobile, comprising: (6) Utility Model Registration In the cover for a friction clutch for an automobile according to claim 5, each arc member 23 is formed in an arc shape so as to leave a gap 24 between the end portions of adjacent arc members 23. A friction clutch for automobiles characterized by: