JP3336324B2 - Work fitting stamping device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work fitting and stamping device for press-fitting an annular part to a shaft-like work, and making a mark on the work to indicate a fitting positional relationship between the work and the annular part.

[0002]

2. Description of the Related Art Conventionally, when a timing sprocket is press-fitted into a crankshaft of a motorcycle, the timing sprocket is firmly held in consideration of a fitting positional relationship with the crankshaft, and the crankshaft is pressed by a press-fitting device. It was press-fitted to the shaft. In addition, a stamp indicating the fitting positional relationship between the crankshaft and the timing sprocket is formed on the end of the crankshaft by manual punching.

[0003]

In the prior art, since the crankshaft is of a cantilever type, the crankshaft attitude becomes unstable when the timing sprocket is press-fitted, and sometimes the balance of the crankshaft is lost and the timing sprocket is lost. There is a problem that the press-fitting is performed in an inclined state. In addition, the marking on the end of the crankshaft to indicate the fitting positional relationship between the crankshaft and the timing sprocket has a problem that the displacement of the stamping position due to manual punching affects the subsequent assembling work. Had.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to accurately and securely press-fit an annular component to a shaft-like work. It is another object of the present invention to provide a work fitting and marking device capable of accurately marking a work on a work to indicate a fitting positional relationship between the work and the annular component.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a cylindrical member having one end fixed to a base member and a plurality of support pins for holding an annular component in an opening at the other end. A holder slidably engaged with the inner peripheral surface of the member and having a recess formed at one end with a leading end of the shaft-shaped work fitted thereto, and a holder compressed between the holder and the base member to press the holder. (1) a spring, an engraving member arranged in the concave portion for engraving the end face of the work, a slide member arranged between the holder and the base member, and a shrinkage member between the slide member and the base member. And a second spring for pressing the slide member, the base member is advanced with respect to the work, the component is press-fitted to the work, and a fitting positional relationship between the work and the component is formed. Represents It is intended to apply the mark.

[0006]

When the cylindrical member holding the annular component held by the plurality of support pins is advanced toward the cantilevered shaft-like workpiece, the workpiece is loosely inserted into the annular component and the first component is moved to the first position.
By the elastic force of the spring, the front end of the work fits into the concave portion of the holder located at the opening of the cylindrical member and contacts the marking member. Furthermore, when the cylindrical member is advanced, the holder fitted to the tip of the work moves toward the base member side against the elastic force of the first spring as the cylindrical member advances. Then, when the annular component is press-fitted to a desired position on the workpiece and the annular component is fitted to the shaft-shaped workpiece, the slide member presses the holder toward the workpiece by the elastic force of the second spring. Then, the fitting position of the annular component to the work is marked on the end face of the work by the marking member attached to the holder.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a cross-sectional view of a work fitting and engraving device according to the present invention, FIG. 2 is a cross-sectional view of a holder provided with an engraving member, FIG. 3 is a front view of a cylindrical member holding a sprocket,
4 and 5 are explanatory views of the operation of the work fitting and engraving device.

[0008] As shown in FIG.
Includes a cylindrical member 6 having one end 6a fixed to the base member 2 with bolts 3 and a holding member 5 for holding a timing sprocket 4 as an annular component mounted on an opening 6c at the other end 6b.

As shown in FIGS. 1 and 3, the holding member 5 is formed with an opening 5a slightly larger than the opening 4a of the timing sprocket 4, and is engaged with the groove 4b of the timing sprocket 4 around the opening 5a. Sprocket 4
Are fixed by screws 8. The holding member 5 is fixed to the opening 6c of the cylindrical member 6 by bolts 5b in a state of being fitted into the opening 6c.

A holder 9 is provided inside the cylindrical member 6 so as to slidably engage with the inner peripheral surface 6d.
At one end of the holder 9 is formed a concave portion 9a into which a distal end portion 10a of a crankshaft 10 serving as a shaft-shaped work is fitted, and at the other end is formed a concave portion 9b with which the first spring 11 is engaged.

Here, as shown in FIG. 1, the crankshaft 10 is formed so as to gradually increase in diameter from the tip portion 10a to the portion where the timing sprocket 4 is fitted. And the crankshaft 10
The rear end portion 10b is supported by the support means 12 in a cantilever manner. FIG. 1 shows the timing sprocket 4 fitted in a predetermined position on the crankshaft 10.
And the timing sprocket 4 held by the support pins 7 are shown. Reference numeral 13 denotes a key member of the holder 9 which engages with a key groove 6e formed on the inner peripheral surface 6d of the cylindrical member 6.

[0012] As shown in FIG.
a stamping member 14 in a state where the pointed end protrudes from the bottom surface 9c of FIG.
Are attached with screws 15. The engraving member 14 is provided on the distal end face 10 c of the crankshaft 10.
0 is used to indicate the fitting positional relationship between the timing sprocket 4 and the timing sprocket 4, that is, the position of the groove 4b of the timing sprocket 4 with respect to the crankshaft 10 by engraving. Therefore, the position of the marking member 14 is determined corresponding to the position of the support pin 7.

As shown in FIG. 1, one end of the first spring 11 is engaged with the concave portion 9b, the other end is wound around a shaft member 16 facing the inside of the cylindrical member 6, and the holder 9 is attached to the holding member 5 side. Between the holder 9 and the base member 2. The shaft member 16 stands on a mounting member 17 fitted to the base member 2.

An annular slide member 18 having an opening for loosely inserting the shaft member 16 is slidably disposed on the inner peripheral surface 6d of the cylindrical member 6 between the holder 9 and the mounting member 17. . The protrusion of the slide member 18 toward the holder 9 is restricted by a step 6f formed on the inner peripheral surface 6d.
Further, a second spring 19 for urging the slide member 18 toward the holder 9 is compressed between the slide member 18 and the mounting member 17.

The operation of the work fitting and engraving apparatus 1 configured as described above will be described. First, as shown in FIG.
By engaging two support pins 7 provided on the holding member 5 with the grooves 4b of the timing sprocket 4, the timing sprocket 4 is held in a predetermined posture as shown in FIG.

Next, as shown in FIG.
Crankshaft 10 supported in a cantilevered state by
The workpiece fitting and engraving device 1 holding the timing sprocket 4 is positioned by a positioning means (not shown) so as to face the distal end face 10c of the work. At this time, the holder 9 is at a position protruding from the opening 5 a of the holding member 5 by the elastic force of the first spring 11.

Next, when the workpiece fitting and engraving device 1 is advanced toward the crankshaft 10 by the advancing and retreating means (not shown), as shown in FIG.
The front end portion 10a of the “0” fits into the concave portion 9a of the holder 9, and the front end surface 10c contacts the engraving member 14. Further, as the workpiece fitting and engraving device 1 moves forward by the reciprocating means, the holder 9 moves the cylindrical member 6 against the elastic force of the first spring 11.
Is moved to the base member 2 side by sliding on the inner peripheral surface 6d.

When the timing sprocket 4 is pressed into the vicinity of a desired position of the crankshaft 10, the holder 9 comes into contact with the slide member 18, and the slide member 18 is further strengthened by the second spring 19 which is stronger than the first spring 11. Of the holder 9 by the elastic force of the crankshaft 1
Press to the 0 side. The forward force of the reciprocating means is set to be stronger than the elastic force of the second spring 19.

Then, as shown in FIG. 5, the timing sprocket 4 is fitted to the crankshaft 10 at a desired position, and at the same time, the fitting position of the timing sprocket 4 to the crankshaft 10 is Is engraved on the front end face 10c.

After the end face 10c of the crankshaft 10 is engraved, the workpiece fitting and engraving device 1 is retracted by the advancing and retreating means, and when the state shown in FIG. 1 is reached, the timing sprocket 4 is press-fitted onto the crankshaft 10. Work is completed.

[0021]

As described above, according to the present invention, it is possible to press-fit an annular component to a shaft-like workpiece accurately and reliably, and at the same time, to imprint the positional relationship between the workpiece and the annular component. Can be accurately applied to the work.

[Brief description of the drawings]

FIG. 1 is a sectional view of a work fitting and engraving device according to the present invention.

FIG. 2 is a sectional view of a holder provided with a marking member.

FIG. 3 is a front view of a cylindrical member holding a sprocket.

FIG. 4 is an explanatory view of the operation of the work fitting and engraving device.

FIG. 5 is an explanatory view of the operation of the work fitting and marking device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Work fitting stamping apparatus, 2 ... Base member, 4 ... Timing sprocket (annular part), 5 ... Holding member, 6 ... Cylindrical member, 6c ... Opening of cylindrical member, 6d ... Inner peripheral surface of cylindrical member, 7 ... Support pin, 9 ... Holder, 9a ... Recess, 10 ... Crankshaft (shaft-shaped work), 10a ... Crankshaft tip, 10c ... Crankshaft tip, 11 ... First spring, 14 ... Marked member, 18 ... Slide member, 19 ... second spring.

Continuation of front page (58) Fields investigated (Int. Cl. ⁷ , DB name) B23P 19/02-21/00 B25H 7/04 B41K 3/36

Claims (1)

(57) [Claims] 1. A cylindrical member having one end fixed to a base member and a plurality of support pins for holding an annular component in an opening at the other end, and one end slidably engaged with an inner peripheral surface of the cylindrical member. A holder formed with a recess into which the tip of the shaft-shaped work is fitted, a first spring compressed between the holder and the base member to press the holder, and a stamp for engraving an end face of the work. An engraving member disposed in the recess, a slide member disposed between the holder and the base member,
A second spring for compressing the slide member and pressing the slide member between the slide member and the base member, and advancing the base member with respect to the work to press-fit the component to the work; A work fitting marking device, wherein a mark indicating a fitting positional relationship with the component is provided on the work.