JP2678164B2 - Spring assembly of automatic transmission for vehicle and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a spring assembly incorporated in an automatic transmission for a vehicle, and a manufacturing method which can be suitably implemented for manufacturing the assembly.

[Prior Art] In a clutch of an automatic transmission for a vehicle, as shown in FIG. 7, a cup-shaped die-cast bell member 30 and an annular plate 31 are arranged in parallel with each other between the two members 30, 31. A mechanism having a plurality of coil springs 32 arranged at equal pitch is used. A flat surface 33 is provided inside the bell member 30, and a plurality of protruding bosses 34 for guiding the coil springs 32 are provided at this position. Then, in order to assemble this mechanism, the bell member 30 is placed on the workbench so that its inner flat surface 33 is horizontal and the boss 34
Is positioned vertically and the worker sequentially fits the coil spring 32 into the boss 34. However, in this assembling method, one or several coil springs 32 adjacent to each other are entangled with each other, some of the coil springs 32 are forgotten to be mounted during the assembling work, and some of them are finally assembled. There were various inconveniences such as detachment.

Therefore, an attempt was made to eliminate the above-mentioned inconvenience in assembling work by supplying the plurality of coil springs 32 as spring assemblies fixed in fixed positions instead of in a disjointed state (Japanese Patent Publication No. 56-47419). . As shown in FIGS. 8 and 9, the spring assembly 35 at this time has a plurality of protrusions 37 on one surface of the annular base plate 36 which serves as a spring seat.
Is formed by punching, one end of the coil spring 32 is fitted into the protrusion 37, and then the protrusion 37 is expanded to fix the coil spring 32 to the annular substrate 36.
Alternatively, the coil spring 32 may be fixed to the annular substrate 36 by brazing means. Further, according to this spring assembly 35, the coil spring 32 is fixed to each projecting portion 37 so that its position and straightness can be correctly obtained.

[Problems to be Solved by the Invention] However, in the conventional spring assembly 35, the coil spring 32 is fixed by simply expanding the protrusion 37 as described above, or simply brazed.
There is a problem in that the projecting portion 37 needs to be expanded or brazed as many times as the coil springs 32, which requires time and effort for assembly.

The present invention has been made in view of the above circumstances,
An object of the present invention is to provide a spring assembly for an automatic transmission for a vehicle, which is easy to assemble, and a manufacturing method thereof.

[Means for Solving Problems] A spring assembly for an automatic transmission for a vehicle according to the present invention is a spring assembly for an automatic transmission for a vehicle, in which coil springs are attached to one surface side of an annular substrate at predetermined pitch intervals. The outer peripheral edge and the inner peripheral edge of the annular base plate are bent and faced to the same one side to form an annular mounting groove, and a seat having an outer diameter substantially the same as the pitch interval is formed at one end of the coil spring. A winding portion is formed, the end winding portion is inserted into the annular mounting groove while being in contact with each other, and the end winding portion is attached with the pitch interval between the coil springs adjacent to each other regulated.

Further, according to the method of manufacturing a spring assembly for an automatic transmission for a vehicle of the present invention, the outer peripheral edge and the inner peripheral edge of the annular base plate are bent to face the same one side and are bent to face each other to form an annular mounting groove. A part of the mounting groove of is opened to form an insertion opening, and a coiled portion having an outer diameter of approximately the same size as a predetermined pitch interval is formed at one end of the coil spring. It is characterized in that after inserting the coil springs from the insertion opening of the mounting groove into the mounting groove so as to abut each other and attaching the coil spring to the annular substrate, the insertion opening portion of the annular substrate is bent to close the insertion opening.

[Operation] According to the present invention configured as described above, the coil springs are attached to the annular substrate at a predetermined pitch by inserting the end turn portions of the coil spring into contact with each other in the attachment groove of the annular substrate. .

EXAMPLES Examples of the present invention will be specifically described below with reference to the accompanying drawings. In the respective embodiments, the same elements are designated by the same reference numerals and correspond to each other, and duplicate description will be omitted.

1 and 2 are a front view and a side view showing a first embodiment of the present invention. The spring assembly comprises an annular base plate 1 and a plurality of coil springs 2 mounted on the annular base plate 1 at equal pitches. The ring-shaped substrate 1 is a ring-shaped bottom plate 3, and is bent forward from the inner ring end (inner peripheral edge) and the outer ring end (outer peripheral edge) of the bottom plate 3 and is formed in a substantially U shape so that the edges thereof face each other. It is composed of an inner side plate portion 4 and an outer side plate portion 5. The space surrounded by the bottom part 3 and the inner and outer plate parts 4, 5 serves as a mounting groove 6. That is, the mounting groove 6 has a shape in which the front surface is opened, and the coil spring 2 is mounted in the mounting groove 6. The coil spring 2 is composed of a small-diameter action portion 7 and a large-diameter end turn portion 8. When the end turn portion 8 is inserted into the mounting groove 6 of the annular substrate 1, the action portion 7 projects forward. It is attached in the form. In the automatic transmission for vehicles, it is necessary to attach the coil springs 2 at equal pitch intervals. The end turn portion 8 is wound so as to have the same dimension as this pitch interval. When the coil spring 2 having such a coiled portion is inserted into the mounting groove 6 and the coiled spring is attached to the annular substrate 1 so that the coiled portion 8 comes into close contact with the coiled portion 8 of the adjacent coil spring 2, The coil springs 2 are arranged at predetermined equal pitch intervals. Therefore,
It can be suitably used as a spring assembly of an automatic transmission for a vehicle. In such a structure, the coil spring 2
Since it is not necessary to form a fixing protrusion (see FIG. 8) or the like on the plurality of annular substrates 1, the structure can be simplified.

Next, the manufacturing method of this embodiment will be described. First, the inner ring end and the outer ring end of the ring-shaped bottom plate portion 3 are bent to form the annular substrate 1 having the inner side plate portion 4 and the outer side plate portion 5.
In this case, a part of one of the inner side plate portion 4 and the outer side plate portion 5 is left without being bent. As a result, an insertion opening in which a part of the mounting groove 6 is opened is formed. Reference numerals 4a and 5a in FIG. 1 show this insertion opening portion. On the other hand, the coil spring 2 is formed by inserting the end turn portion 8 having the same size as the predetermined mounting pitch interval into the mounting groove 6 from the insertion port 4a or 5a.
Are brought into contact with each other and attached to the annular substrate 1 one after another. When mounting the coil springs, the end turn portions of the coil springs 2 are in close contact with each other. As a result, the coil spring 2
Are arranged on the annular substrate 1 at the same pitch intervals as the predetermined mounting pitch. Then, the insertion opening 4a or 5a is bent to close the insertion opening. As a result, the coil spring 2 is attached to the annular substrate 1.
It is attached so that it does not come off.

In such a manufacturing method, the end wound portion 8 of the coil spring 2 is inserted into the mounting groove 6 through the insertion opening, and then the insertion opening is closed to obtain the spring assembly. Therefore, it is not necessary to fix the coil springs 2 to the annular substrate 1 one by one, so that the assembly is extremely simplified. The outer diameter of the end turn portion 8 of the coil spring 2 is set between the inner and outer plate portions 4, 5, 5.
The backlash after mounting in the mounting groove 6 can be eliminated by forming the same as or slightly larger than the facing interval.

FIG. 3 shows a front view of the second embodiment of the present invention. As shown in the figure, an inner two-plate portion 4 and an outer two-plate portion 5, which are bent and formed from the inner ring end and the outer ring end of the annular substrate 1, are intermittently formed at predetermined intervals. This distance is set so that the inner side plate portion 4 and the outer side plate portion 5 engage with the end turn portion 8 of the coil spring so that the coil spring 2 does not fall off from the annular substrate 1. . In this embodiment, one side plate portion of the inner side plate portions 4 or the outer side plate portions 5 is opened to serve as an insertion port for inserting a spring, and after all coil springs are mounted, this insertion port portion is inserted. The spring assembly can be manufactured by bending.

FIG. 4 shows a third embodiment of the present invention. In this embodiment, one spring group is formed by a predetermined number (three in the illustrated example) of coil springs, and this spring group is attached to the annular base plate 1 at predetermined intervals. The coil springs 2 in each spring group are wound so as to have the same size as the adjacent coil springs 2 at a predetermined equal pitch interval. In this embodiment as described above, the stopper pieces 9 are cut and raised from the bottom plate portion 3 of the annular substrate 1 located at both end portions of each spring group, and the stopper pieces 9 abut on both end portions of each spring group. The springs are fixed in place. In the manufacture of this embodiment, the stopper side 9 on one end side in each spring group is cut and raised, the other end side which is not cut and raised is used as an insertion port, and the coil spring 2 is inserted, and then the bottom plate of the insertion port portion is inserted. Each spring group can be fixed by cutting and raising a part of the portion 3.

5 and 6 show a fourth embodiment of the present invention. This embodiment uses a coil spring 2 having a double structure of an outer spring 10 and an inner spring 11. FIG. 5 shows that this double coil spring 2 is attached to an annular substrate 1 at a large pitch interval, and FIG. Indicates the case of mounting at a small pitch interval. The double coil spring 2 is applied particularly when increasing the load or obtaining a non-linear characteristic. In such a spring assembly, of the double coil spring 2, the end turn portion 12 of the outer spring 10 is wound and formed to have the same size as the pitch interval of the spring, and the inner spring 11 is formed in the outer spring 10.
Is inserted to form the double coil spring 2. Then, the end turn portion 12 of the outer spring 10 is inserted into the mounting groove 6 of the annular substrate 1,
After that, assembling can be performed by performing the same as in each of the embodiments. In this case, the inner spring 11 has its end turn portion 13
Is fixed by the outer spring 10, no fixing means dedicated to the inner spring 11 is required.

[Effects of the Invention] As described above, in the spring assembly of the present invention, the outer peripheral edge and the inner peripheral edge of the annular base plate are bent to the same one surface side and bent to face each other to form the annular mounting groove. Can be attached simply by abutting the end turn portions in the attaching groove with each other and inserting them in order.

At this time, since the end turn portions of the coil springs are formed to have an outer diameter having substantially the same size as the predetermined pitch interval, if the end turn parts are brought into contact with each other and attached, adjacent coil springs are attached at the predetermined pitch interval. It will be. Therefore, the structure is simple and the mounting is easy.

Further, according to the manufacturing method of the present invention, since the spring assembly can be obtained only by closing the insertion opening portion after inserting the end turn portion of the coil spring into the mounting groove from the insertion opening, the manufacturing thereof is extremely easy. Become.

[Brief description of the drawings]

1 and 2 are a front view and a side view of the first embodiment of the present invention, FIG. 3 is a front view of the second embodiment, and FIG. 4 is a third view.
A front view of the embodiment, FIGS. 5 and 6 are sectional views of the fourth embodiment, FIG. 7 is an assembly view of a clutch portion of a conventional automatic transmission for a vehicle, and FIG. 8 is a spring assembly of the same. Perspective view,
FIG. 9 is a sectional view taken along line XX of FIG. 1 ... Annular substrate, 2 ... Coil spring, 3 ... Bottom plate part, 4,
5 ... Side plate, 6 ... Mounting groove, 7 ... Working part, 8 ... End coil.

Claims (2)

(57) [Claims] 1. A spring assembly for an automatic transmission for a vehicle, wherein coil springs are mounted on one side of an annular base plate at a predetermined pitch, and the outer peripheral edge and the inner peripheral edge of the annular base body are bent to face the same one side and face each other. The coil spring is bent and formed in an annular mounting groove, and a coiled portion having an outer diameter substantially the same as the pitch interval is formed at one end of the coil spring. The coiled portion abuts the annular mounting groove. A spring assembly for an automatic transmission for a vehicle, wherein the spring assembly is inserted in contact with the coil spring, and the coil spring is attached by regulating the pitch interval between the coil spring and an adjacent coil spring. 2. An outer peripheral edge and an inner peripheral edge of an annular base plate are bent and opposed to each other on the same one side to form an annular mounting groove, and a part of the annular mounting groove is opened to form an insertion opening. Then, after inserting the end turn part into the mounting groove from the insertion hole of the annular mounting groove so as to abut against each other and attaching the coil spring to the annular substrate, bend the insertion port portion of the annular substrate to insert the insertion port. A method of manufacturing a spring assembly for an automatic transmission for a vehicle, comprising: