JPH06143111A - Polishing device - Google Patents

Abstract

PURPOSE: To reduce noise and abrasion and cut working time by supporting a roller having an eccentric outer peripheral surface and a wheel driven by the first spindle with the spindle pin of an eccentric wheel drive placed eccentrically on the second spindle driven by the first spindle. CONSTITUTION: A spindle 1 and a spindle 3 rotate in parallel to each other at the same rotational speed. A spindle pin 9, positioned so as to be eccentric relative to the spindle 3, generates reciprocating and oscillating motion of a coupling element 15 in connection with a guiding slit 13. In synchronization with it, a crank 21 generates reciprocating motion 25 of a rod 19. Therefore, a polishing tool holder 20 travels on an elliptical or a circular trajectory. In addition to this fundamental motion, an oscillating motion is generated by an eccentric roller 10. The roller 10 rotating at a high speed generates the vibrating and oscillating motion of the coupling element 15, which is superimposed on the elliptical trajectory.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is centered on a first shaft driven by an electric motor for driving a crank that reciprocates a rod for an abrasive tool holder, and an axis extending perpendicular to the axis of the rod. And a connecting element which can be swung, the connecting element being swung back and forth by an eccentric wheel drive in which the rod is guided longitudinally.

[0002]

2. Description of the Related Art Such a polishing apparatus is disclosed in US Pat. No. 26900.
No. 81 is known. The polishing tool holder is moved on a circular track. As a result, only a circular or circular-like polishing track can be obtained, which cannot be performed in a cross stitch shape.

The grinding device in DE 3702937 abandons the precise, play-free guide of the grinding tool holder and requires an auxiliary drive for the lateral movement of the grinding tool holder. There is a problem of noise generation and wear due to the loose guide.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a polishing device having a central drive and a precisely controlled motion trajectory of a very complex shape.

[0005]

SUMMARY OF THE INVENTION According to the invention, the object is that the axle pin of an eccentric wheel drive is eccentrically placed on a second axle driven by a first axle, the eccentric outer peripheral surface being And a roller driven by a first shaft.

The present invention differs from the prior art in that the lateral motion of the auxiliary eccentric wheel drive is superimposed on the elliptical trajectory generated by the play-free guide.

This results in a precisely defined trajectory with a cross-sewn cover. Since a large cover by a polishing path (Polierstichen) can be obtained in a very large processing area, the processing time can be shortened.

In order to uniformly transmit the motion to the rollers, the first shaft supports the drive gear at the same eccentric distance as the shaft pin of the eccentric wheel drive, and the drive gear drives the wheel with a rotation speed increasing ratio. I suggest that.

The tight superposition movement is achieved by the rotational acceleration being performed at a ratio of at least 1: 3.

Precise motion transmission is achieved by connecting the shafts via gear transmissions.

The cycle of movement is ensured by the fact that all wheels are formed as gear wheels and the connecting elements are formed as toothed V-belts.

A supplementary method of track adjustment is obtained by the fact that the crank drive can be adjusted independently of the eccentric drive.

An accurate, wear-free and noise-free guide of the connecting element has an arm with a guide slit in which the connecting element extends perpendicularly to said axis, on which the axial pin of the eccentric wheel drive is mounted. This is ensured by the engagement of the rollers placed on the.

[0014]

The present invention will be described in detail with reference to the embodiments shown in the drawings.

The frame and housing of the polisher are not shown for simplicity. The polishing device is formed as a hand-operated instrument, the housing of which is grasped and guided by hand.

The first shaft 1 is driven by an electric motor 2. A second shaft 3 is provided parallel to the first shaft 1. The shaft 1 and the shaft 3 are supported by a frame (not shown). Gears 4 and 5 are placed concentrically on the shaft 1 and the shaft 3, respectively. These gears 4, 5 have the same diameter,
They are connected by a toothed V-belt 6. A gear 8 is provided on the shaft 1. The axis 7 of the gear 8 is located eccentrically with respect to the axis of the shaft 1.

The shaft 3 carries a shaft pin 9 whose eccentricity corresponds in magnitude and direction to the eccentricity of the axis 7 with respect to the shaft 1. A roller 10 having an eccentric outer peripheral surface is supported on the shaft pin 9. Roller 10 is toothed V
It has a gear 11 which is connected to the gear 8 by a belt 12. Since the gear 11 has a smaller number of teeth than the gear 8, the rotation speed of the shaft 1 is transmitted to the roller 10 at an increased speed. This speedup ratio is at least 1: 3, preferably 1: 4. In this case, it is not necessary that the speed increase ratio is an integer. Gear 8 and gear 11 always have the same axial spacing,
In order to ensure that the toothed V-belt 12 is always tensioned in this way, the axis 7 and the axis pin 9 must have the same eccentricity.

The roller 10 is engaged in a guide slit 13 in the arm 14 of the connecting element 15. The connecting element 15 can be swung in the frame 17 about the axis 16 and has a straight through hole 18. The through hole 18 forms a longitudinal guide for the rod 19. A polishing tool holder 20 is placed on the rod 19. Rod 1
A crank 21 is connected to 9 via a ball joint-shaped joint. The crank 21 is connected to a crank pin 22 driven by an eccentric wheel drive device of the shaft 1. The crank 21 produces a reciprocating movement 25 of the rod 19. The eccentric wheel drive device 23 is formed to be adjustable.

The polishing device is driven by only one electric motor 2. The shaft 1 and the shaft 3 rotate in parallel with each other at the same rotation speed. The shaft pin 9 is located eccentrically with respect to the shaft 3, and interlocks with the guide slit 13 to generate a reciprocating rocking movement 24 of the connecting element 15. Synchronously, the crank 21 generates a reciprocating movement 25 of the rod 19. This causes the polishing tool holder 20 to move on an elliptical orbit.

In addition to this basic movement, the oscillating movement generated by the eccentric roller 10 also occurs. The roller 10 rotating at a high speed generates an oscillating oscillating movement of the connecting element 15 which is superimposed on the elliptical orbit.

FIG. 4 shows a simulated view of the movement trajectory of the polishing tool holder. The basic ellipse and vibration superposition can be understood from this figure. The total movement trajectory depends on the size of the rotational speed gear ratio between the gear 8 and the gear 11. Since the motion trajectory covers a large area, the polishing capacity is correspondingly increased.

[0022]

According to the present invention, noise and wear are reduced and processing time is shortened.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of driving and moving parts of a polishing device.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a plan view of the polishing device shown in FIG.

FIG. 4 is a diagram showing the movement of the polishing tool.

[Explanation of symbols]

 1 1st axis 2 Electric motor 3 2nd axis 8 Drive gear 9 Shaft pin 10 Roller 11 Gear 13 Guide slit 14 Arm 15 Connecting element

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Gunter, Goncelowski County of Ireland, West Meath, Streamstown, Mullingar, Streamstown, House, EOS, NORMARIAN, LIMITED (No address) )

Claims (7)

[Claims] 1. A first shaft driven by an electric motor for driving a crank for reciprocating a rod for an abrasive tool holder, and a connecting element swingable about an axis extending perpendicular to the axis of the rod. In which the connecting element is reciprocally rocked by the eccentric wheel drive and in which the rod is guided longitudinally, the axle pin (9) of the eccentric wheel drive is Eccentrically placed on a second shaft (3) driven by one shaft (1),
Wheel (1) driven by an eccentric outer peripheral surface and a first shaft (1)
A polishing device characterized in that it supports a roller (10) having (1) and. 2. A first shaft (1) supports a drive gear (8) at the same eccentric distance as a shaft pin (9) of an eccentric wheel drive, and the drive gear (8) increases the rotation of the wheel (11). The polishing apparatus according to claim 1, which is driven at a speed ratio. 3. The polishing apparatus according to claim 2, wherein the rotational speed is increased at a ratio of at least 1: 3. 4. The polishing apparatus according to claim 1, wherein the shafts are connected via a gear transmission. 5. All wheels are formed as gears,
5. The grinding device according to claim 1, wherein the connecting element is formed as a toothed V-belt. 6. The polishing device according to claim 1, wherein the crank drive can be adjusted independently of the eccentric wheel drive. 7. The coupling element (15) has an arm (14) with a guide slit (13) extending perpendicularly to said axis, in the guide slit (13) an eccentric wheel drive axle pin (14). 9. A polishing device according to any one of the preceding claims, characterized in that the rollers (10) placed on it are engaged.