JPH0227236Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a stroke adjustment device for, for example, an abrasive tool.

[Conventional technology]

The rotational motion of a rotating body driven by a motor is converted into reciprocating motion, and the stroke of the reciprocating motion of the spindle is adjusted depending on the work area, for example, in the case of a tool that is polished using an abrasive material set at the tip of a reciprocating spindle. It will be necessary to make adjustments.

Therefore, Japanese Utility Model Publication No. 35-26697 discloses a device for adjusting the stroke of reciprocating motion.

When adjusting the stroke, this known device first stops the motor, removes the gearbox cover, loosens the screw, and adjusts the stroke by turning the adjustment plate until the desired stroke is reached. Tighten and fit the cover,
The motor is starting to run.

[Problem that the invention attempts to solve]

When adjusting the stroke, it is necessary to stop the motor and use a tool to loosen and tighten the screws.

For this reason, there was a problem in that work had to be interrupted during adjustment.

[Means for solving problems]

In order to solve the above problems, this idea
A case, a rotating body built into this case, a motor that drives this rotating body, a through hole provided in the end wall of the case so as to be eccentric with respect to the axis of the rotating body, and an eccentric position at the end of the shaft cylinder. A cylindrical body that protrudes and rotatably penetrates the through hole, a spindle that stops rotation and slidably penetrates the cylindrical body, and a spindle that is provided at an eccentric position on the tip surface of the rotating body and on the distal end surface of the spindle. A substantially hemispherical recess, a shaft member with spherical parts at both ends fitted into both recesses, and a shaft member that is inserted into a through hole provided in the axis of the shaft member, and one of which is fixed to the rotating body and the spindle. and a wire supported with the other under tension by a spring.

[Effect]

This idea stops the reciprocating motion of the spindle by aligning the axis of the spindle with the axis of the rotating body while rotating the barrel, and aligns the axis of the spindle with the axis of the rotating body while rotating the barrel. , the stroke of the reciprocating motion of the spindle is changed by shifting the axis of the spindle.

〔Example〕

In the figure, 1 is a case, and inside this case 1 is a rotating body 3 driven by a motor 2.
is provided, and one end of the rotating body 3 is cut out in a wedge shape.

In the illustrated case, transmission from the motor 2 to the rotating body 3 is carried out through a cylindrical joint 3 on the output shaft 5 of the motor 2.
At the same time, the pin 6 that is screwed into the output shaft 5 and protrudes from the circumferential surface of the output shaft 5 is fitted into and engaged with the long hole 7 of the cylindrical joint 35, and then the pin 6 is inserted into the inner diameter part of the other end of the joint 35. , the rotating body 3
Although the wedge-shaped notch at one end of the two is fitted and engaged, the transmission may be transmitted by a structure other than the above.

Further, a through hole 8 is provided in the tip wall of the case 1 and is eccentric to the center of the rotating body 3.

Further, at an eccentric end position of the shaft cylinder 9, a cylinder body 10 is provided which is connected to the shaft cylinder 9, rotatably penetrates the through hole 8, and whose outer and inner circumferences are eccentric. .

Furthermore, a freely slidable spindle 11 that has stopped rotating passes through the shaft tube 9 .

To stop the rotation of the spindle 11, as shown in the figure, a long hole 12 is provided in the direction of the outer peripheral axis of the spindle 11, and the tip of a screw 13 screwed into the shaft cylinder 9 is fitted into the long hole 12.

Further, substantially hemispherical recesses 14 and 15 are provided between the eccentric position of the tip end surface of the rotating body 3 and the end surface of the spindle 11, and these recesses 14 and 15 are provided with spherical portions provided at both ends of the shaft member 16. 17 is inserted.

In addition, a through hole 18 is provided in the axis of the shaft member 16,
A wire 19 is inserted through the through hole 18, and one end of the wire 19 is fixed to the rotating body 3 and the spindle 11, and the other end is supported under tension by a spring 32.

In the case of the above-mentioned fixing method, a recess 14 is provided on the distal end surface of the shaft member 22, and the spherical portion 1 is placed in the recess 14.
At the same time, the wire 19 is inserted into the through hole 23 through which the center of the bottom of the recess 14 and the end surface of the shaft member 22 pass, and the protruding end of the wire 19 is brought into contact with the end of the shaft member 22. The fixing member 24 is provided, and the shaft member 22 is fitted into the recessed hole 21 provided inward from the eccentric position on the tip surface of the rotary body 3. Then, the screw 25 screwed from the outer periphery of the rotary body 3 is inserted. The tip of the shaft member 22 is pressed against the outer periphery of the shaft member 22 and fixed, and a recessed hole 26 is provided inward from the end face of the spindle 11. 28, and the spherical part 17 is fitted into the recess 15 provided on the distal end surface of the shaft member 28, and the recess 1
A wire 19 is inserted into a through hole 29 through which the center of the bottom surface of the wire 19 and the end surface of the shaft member 28 pass through, and a spring bearing shaft member 30 is fitted to the protruding end of the wire 19 to fix the fixing member 31. A spreading spring 32 is interposed between the bearing 27 and the spring bearing shaft member 30.

The end of the arm 33 having an abrasive material A at its tip is supported at the tip of the spindle 11, and the abrasive material A moving back and forth is used for polishing, but other methods may be used.

In the figure, numeral 34 is a chuck having a tightening screw provided at the tip of the spindle 11.

The stroke adjusting device according to this invention has the above-mentioned configuration, and its operation will be explained next. When the motor 2 starts operating and the rotating body 3 is driven,
The shaft member 16 rotates together with the rotating body 3.

At this time, by rotating the shaft tube 9 to align the shaft center of the spindle 11 with the shaft center of the rotating body 3, the spindle 11 is stopped without reciprocating movement by the shaft member 16.

Next, when the shaft cylinder 9 is rotated, the relative position of the through hole 8 and the cylinder 10 fitted into the through hole 8 changes, and the axis of the spindle 11 shifts from the axis of the rotating body 3. , the spindle 11 reciprocates via the shaft member 16 which rotates and swings.

At this time, the greater the deviation of the axis of the spindle 11 from the axis of the rotating body 3, the greater the stroke of the reciprocating motion of the spindle 11.

As described above, according to the stroke adjustment device for reciprocating motion according to this invention, when the shaft cylinder is rotated,
The cylindrical body protruding from the end eccentric position of the shaft cylinder and the through hole provided at the end wall eccentric position so that the cylindrical body fits into it are used to align the axes of the rotating body and the spindle, and to align the axes of the rotating body and the spindle. Since the spindle can be shifted, the stroke of the spindle can be easily and quickly adjusted without stopping the motor.

In addition, approximately hemispherical recesses are provided at the eccentric position of the tip surface of the rotating body and at the end surface of the spindle, and the spherical portions at both ends of the shaft member are fitted into both recesses, and the axial center of the shaft member is passed through the recesses. One end of the wire is fixed to a rotating body and a spindle, and the other is supported under tension by a spring, so the spring presses the spherical part into the recess to prevent rattling during wear. When an unreasonable force is applied, the spring is compressed, so the transmission at the bent part becomes smoother and troubles are eliminated.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway side view of a stroke adjusting device according to this invention, and FIG. 2 is a longitudinal sectional side view in which the amount of eccentricity of the shaft member is reduced. 1... Case, 2... Motor, 3... Rotating body, 5... Output shaft, 6... Pin, 7... Long hole, 8
...Through hole, 9...Shaft tube, 10...Cylinder body, 11...
Spindle, 12... Long hole, 13... Screw, 1
4, 15... recessed part, 16... shaft member, 17... spherical part, 18... through hole, 19... wire, 21...
... Recessed hole, 22 ... Shaft material, 23 ... Through hole, 24
... Fixing member, 25 ... Screw, 26 ... Recessed hole,
27...Bearing, 28...Shaft material, 29...Through hole, 30...Spring bearing shaft material, 31...Fixing member,
32...Spring.

Claims (1)

[Scope of utility model registration request] A case, a rotating body built into the case,
A motor for driving this rotating body, a through hole provided in the tip wall of the case so as to be eccentric with respect to the axis of the rotating body, and an outer circumference and an inner circumference protruding eccentrically from the end eccentric position of the shaft cylinder, A cylindrical body rotatably penetrated through the above-mentioned through hole, a spindle that stopped rotating and slidably penetrated the cylindrical body, and a substantially hemispherical shape provided at an eccentric position on the tip surface of the rotating body and on the distal end surface of the spindle. A shaft member having spherical parts at both ends fitted into both recesses, and a through hole provided in the shaft center of this shaft member, one of which is fixed to the rotating body and the spindle, and the other A reciprocating stroke adjustment device consisting of a wire supported under tension by a spring.