JPH03294169A - Motor polishing device - Google Patents

Abstract

PURPOSE:To extremely reduce the generation of a flow, uneven wear, etc., on the contact part of the body to be worked, by installing a fixed spindle movably back and forth which moves a polishing tool forwards and backwards by the torque of a motor and also providing a main arm which performs a rocking motion by the torque of this motor. CONSTITUTION:For performing the polishing of an objective body, a polishing tool 14 is moved forwards and backwards by the torque of a motor 1 and also a fixed spindle 15 fixing this polishing tool 14 is rocked by a main arm 17 in the direction intersecting a forwards and backwards motion axis by the torque of the motor 1. The reciprocating motion and rocking motion of this polishing tool 14 are performed by the same motor 1 and the locus of the polishing tool 14 can be set in the shape that curvilinear motion and rectilinear motion are mixed by synchronizing the reciprocating motion and rocking motion. So, the contact part of the polishing tool and the body to be polished is not concentrated at one part, the contact can be uniform, and the possible generation of flaws, unever wear, etc., on the surface of the body to be worked is extremely low.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electric polishing device used for surface polishing of molds, precious metals, dental techniques, and various other articles.
The purpose is to perform high-precision polishing in a short time by hand-held work.

2. Description of the Related Art Conventional electric polishing apparatuses are capable of rotating, swinging, reciprocating, and other movements of the polishing tool in only one direction.

As a result, the polishing tool and the same part of the workpiece repeatedly come into contact with each other, which tends to cause scratches and uneven wear on the surface of the workpiece.
Moreover, once this uneven wear occurs, it progresses rapidly. In order to prevent this scratching and uneven wear, an operator moves the polishing tool forward and backward in a direction that intersects with the direction in which the polishing tool advances and retreats. However, the forward and backward movement by an operator's hands is significantly slower than the forward and backward movement performed by an electric motor, so the above-mentioned drawbacks cannot be eliminated. In order to solve this problem, the rotation of one electric motor causes the polishing tool to perform reciprocating motion as well as two oscillating motions in a direction intersecting the direction of the reciprocating motion. This movement prevents repeated contact between the polishing tool and the same part of the workpiece, and prevents scratches and uneven wear on the workpiece. It also eliminates the need for the operator to move the polishing tool, thereby enabling precise and quick polishing work.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a fixed spindle for moving a polishing tool forward and backward using the rotational force of an electric motor, and a fixed spindle that is mounted so as to be able to move forward and backward, and a rotation of the electric motor. It consists of a main arm that swings due to power.

In another invention, a crankshaft is eccentrically rotatably connected to an eccentric shaft that is connected to an electric motor and rotates, and a joint shaft is connected to the crankshaft in a direction intersecting the axial direction of the crankshaft, A fixed spindle for fixing the polishing tool is swingably connected to a joint shaft that moves forward and backward as the crankshaft rotates, and a main arm with this fixed spindle attached so that it can move forward and backward is connected to the main arm with the rotating shaft attached to the main body. The main arm is rotatably connected to the swinging piece via a rotation shaft, and the main arm is connected and fixed to a swinging piece that rotates via a rotation shaft, and the main arm is connected to a camshaft for eccentrically rotating the swinging piece via a transmission member. An electric motor is connected and the swing piece is made to swing in synchronization with the movement of a fixed spindle.

In addition, the eccentric shaft consists of a mounting member, an eccentric collar inserted into the mounting member so as to be rotatable and fixed, and a phase correction collar mounted on the mounting member so as to be rotatable and fixed. The axial center of the recess is formed eccentrically from the fine center of the mounting member, and an insertion recess whose axial center is eccentric from the axial center of the eccentric collar is formed in the eccentric collar to be inserted into the mounting recess of the mounting member. The crankshaft is installed in the insertion recess, and the amount of eccentricity of the crankshaft can be adjusted by adjusting and rotating the mounting member within the eccentric collar, and the mounting member is also rotatable within the phase correction collar. Accordingly, the phase of the swinging piece may be modified.

Further, the joint shaft may be rotatably connected to a fixed spindle via a ball joint.

Further, the camshaft has concentric inner parts formed on both sides of the eccentric rotation part, a convex part protruding from the concentric circle at one end, and a concave part concave from the concentric circle at the other end. It's okay.

Further, the transmission member may be formed by a pair of timing pulleys and a timing belt.

Further, the transmission member may be formed by a pair of gears.

Operation Since the present invention is configured as described above, in order to polish the target object, the polishing tool is moved forward and backward by the rotational force of the electric motor, and the fixed spindle on which the polishing tool is fixed is moved by the rotation of the electric motor. The main arm swings in the direction that intersects the axis of forward and backward movement due to power. By performing the reciprocating motion and rocking motion of the polishing tool by the same electric motor and synchronizing the reciprocating motion and rocking motion, the locus of the polishing tool can be set to a shape that combines curved motion and linear motion. Therefore, the contact area between the polishing tool and the workpiece is not concentrated in one part, but can be evenly contacted, and the shape of the 0-length polishing part is extremely unlikely to cause scratches, uneven wear, etc. on the surface of the workpiece. It is possible to perform polishing processing according to the

To explain the operation of the present invention more specifically, when the electric motor is operated, an eccentric shaft connected to the electric motor rotates. As the eccentric shaft rotates, the crankshaft rotates eccentrically, causing a joint shaft connected to the crankshaft in a direction intersecting the axial direction of the crankshaft to advance and retreat. A fixed spindle connected to this joint shaft moves the polishing tool forward and backward at the same time.

Further, due to the operation of the electric motor, the eccentric rotating portion of the camshaft is eccentrically rotated via the transmission member, and the swinging piece connected to the camshaft is caused to perform a pendulum movement. This pendulum movement of the swinging piece causes the main arm connected to the swinging piece to swing about the rotation shaft as a fulcrum.

Since the fixed spindle is attached to the main arm so as to be movable forward and backward, the polishing tool fixed to the fixed spindle simultaneously moves forward and backward and swings in a direction crossing the forward and backward axis.

Therefore, by synchronizing the reciprocating motion and the oscillating motion as described above, the locus of the polishing tool can be set to a shape that combines curved and linear motion, so that the contact area between the polishing tool and the technical object is concentrated in one part. The contact area can be evenly touched without any problems. Therefore, scratches, uneven wear, etc. are extremely unlikely to occur at the contact portion of the workpiece, and polishing can be performed in accordance with the shape of the polished part. In addition, since reciprocating motion and rocking motion are possible with a single electric motor, the weight of the device can be reduced.
This enables miniaturization.

A clever camshaft has concentric inner parts formed on both sides of the eccentric rotating part, a convex part extending from the concentric circle at one end, and a concave part recessed from the concentric circle at the other end.
During one rotation of the camshaft, the fixed spindle's rocking motion pauses twice, making it possible for the polishing tool to trace a leaf-shaped trajectory, allowing polishing work to be performed according to the purpose.

In addition, if the transmission member is formed by a pair of timing pulleys and a timing belt, the eccentric shaft and camshaft can be reliably rotated in synchronization in the same direction with a simple mechanism, making it possible to prevent the polishing tool from being accidentally used even after long periods of use. This enables accurate operation of the polishing tool without having to operate it.

In addition, if the transmission member is formed of a pair of gears, the eccentric shaft and camshaft will rotate in opposite directions in synchronization, and the polishing tool will not malfunction, and the polishing tool will operate reliably. It enables operation.

Embodiment Below, one embodiment of the present invention will be described with reference to the drawings.
) is an electric motor, and a connecting member (3) is fixed to the tip of the driving shaft (2), and an eccentric shaft (4) is connected via this connecting member (3).
are rotatably connected. This eccentric shaft (4) is
It has a mounting member (5) and an eccentric collar (6) rotatably and fixedly mounted within the mounting member (5). The mounting member (5) has a mounting recess (7) into which the eccentric collar (6) is inserted eccentrically from the axis of the mounting member (5). In addition, an eccentric collar (6) to be inserted into this mounting recess (7) is also formed with an insertion recess (8) whose axis is eccentric, and the bearing (10) is inserted into this insertion recess (8).
) to attach the crankshaft (11). The amount of eccentricity of the crankshaft (11) can be adjusted by rotating the mounting member (5) and the eccentric collar (6) in the circumferential direction, and this adjustment position is controlled by the fixing screw (12). Fix it.

Then, the crankshaft (11) is attached to the crankshaft (11).
) is connected to a joint shaft (13) in a direction intersecting with the axial direction of the joint shaft (13). A polishing tool (14) is attached to a joint shaft (13) that moves forward and backward as the crankshaft (11) rotates.
) is pivotally connected via a ball joint (16) to a fixed spindle (15) for fixing the.

In addition, a cylindrical main arm (17) on which the fixed spindle (15) is attached so as to be movable in forward and backward directions is rotatably connected to the attachment body (18) located on the outer periphery of the device via a rotation shaft (20). ing.

Also, the fixed spindle (
A concave groove (21) is formed in the axial direction on the outer peripheral surface of the retaining bottle (15), which is biased by a spring (22) into the concave groove (21).
23) is inserted to prevent the fixed spindle (15) from rotating, allowing it to slide only in the axial direction relative to the main arm (17)6.The fixed spindle (15) is also fitted with a lock screw ( 24) and the polishing tool (1
4) is removably fixed to the inner surface of the tip. Also, within this fixed spindle (15) is a pressing spring (25).
) is slidably attached to the biasing piston (27) that constantly presses the ball joint (16) with the biasing force of the joint shaft (13) to reliably transmit the forward and backward movement of the joint shaft (13) to the fixed spindle (15). There is.

Further, the main arm (17) equipped with the fixed spindle (15) is attached to one side (30
) are connected and fixed, and an elliptical groove (32) whose length direction is parallel to the joint axis (13) is formed in the other piece (3]) located at right angles to the one piece (30). An eccentric rotating portion 34) of a camshaft (33) provided for eccentrically rotating the swinging piece (28) is inserted into this elliptical groove (32) and connected thereto. As shown in FIG. 3, this eccentric rotation part (34) forms concentric inner parts (35) and (36) of concentric circles facing each other at 180 degrees on both sides of the outer circumferential surface. ) (36) with a width of 60°. In addition, the eccentric rotating part (34) has a concentric inner part (35) < 36) on the outer peripheral surface.
A convex portion (37) protruding from the concentric circle is formed at a position 90° from the concentric circle. Further, a concave portion (38) recessed from a concentric circle is formed at a position 180° from the convex portion (37). In addition, the dimensions of the convex portion (37) and the concave and convex dimensions of the concave portion (38) of this eccentric rotation portion (34) are formed so that they are equal to the diameter of the concentric circles at positions facing each other across the axis, and the elliptical dividing groove <32
) The eccentric rotation part (34) is ensured to rotate within. The end of the camshaft (33) opposite to this eccentric rotating part (34) is connected to the sleeve (34) via a bearing (40).
The camshaft (33) is rotatably supported on the camshaft (33).
) can be rotated synchronously with the eccentric shaft (4) via the transmission member (42). This transmission part # (42>) is
One timing pulley (44) of a pair of timing pulleys (44) and (45) is connected to a phase correction collar (43) into which a mounting member (5) of the eccentric shaft (4) is rotatably and fixedly inserted. The other timing pulley (45) is fixed to the outer periphery of the camshaft (33), and the pair of timing pulleys (44) and (45) are connected by a timing belt (46).

In addition, (47) in the drawing is a front lid body whose upper part is fixed to the mounting body (18) with a mounting screw (48), and the fitting recess (5) at the lower end.
0), the fitting protrusion (51) of the mounting body (18) is fitted and fixed.

In the structure as described above, in order to polish the object, when the electric motor (1) is activated, this electric motor (1)
The eccentric shaft (4) connected to the rotation shaft (20) rotates counterclockwise as shown in FIG.

As the eccentric shaft (4) rotates, the crankshaft (11) rotates eccentrically, and a joint connected to the crankshaft (11) in a direction intersecting the axial direction of the crankshaft (11) Move the shaft (13) back and forth.

A fixed spindle (15) to which a polishing tool (4) is fixed is moved back and forth within the main arm (17) via a ball joint (16) provided at the tip of this joint shaft (13). As shown in the table of Fig. 4, the fixed spindle (15) moves forward and backward, and as the eccentric shaft (4) rotates, the amount of forward and backward displacement of the fixed spindle (15) also changes, and the eccentric shaft (4) During one revolution, the stationary spindle (15) also undergoes a reciprocating movement.

The camshaft (33
) rotates via a transmission member (42), and this camshaft (3
The eccentric rotating portion (34) of 3) rotates eccentrically within the elliptical groove (32) of the swinging piece (28) to cause the swinging piece (28) to make a pendulum movement. Due to the pendulum movement of this swing piece (28),
A main arm (17) connected to a swing piece (28) via a joint shaft (13) swings about a rotation shaft (20) as a fulcrum. As shown in the table of FIG. 5, this swinging motion is caused by the fixed spindle (15) swinging as the camshaft (33) rotates, and when the camshaft (33) rotates once, the fixed spindle (15) swings. (15) performs a reciprocating rocking motion.

Furthermore, as mentioned above, the fixed spindle (15) is attached to the main arm (17) so that it can move back and forth, so the polishing tool (14) fixed to the fixed spindle (15) can move forward and backward, and intersect with the axis in the forward and backward directions. This means that the oscillating motion in both directions is performed simultaneously.

In addition, the camshaft (33) has concentric inner parts (35) and (36) formed on both sides of the eccentric rotation part (34), and a convex part (37) that protrudes from the concentric circle at the negative end. If a recess (38) is formed concentrically at the other end, the fixed spindle (15)
) performs two rest periods, and the polishing tool (14
) as shown in FIG. 6, it is also possible to draw a leaf-shaped locus (52), and polishing work can be performed according to the purpose.

Furthermore, if the transmission member (42) is formed by a pair of timing pulleys and a timing belt, the eccentric shaft (4)
The camshaft (33) and the camshaft (33) can be rotated in the same direction using a simple mechanism to ensure reliable synchronized rotation.
The polishing tool (14) can be operated accurately and with low noise without causing malfunction of the polishing tool (14).

Moreover, if the transmission member (42) is formed by two pairs of gears, the eccentric shaft (4) and the camshaft (33)
The polishing tools (14) rotate in synchronization in opposite directions, and the polishing tool (14) does not malfunction, allowing reliable operation of the polishing tool (14).

Effects of the Invention Since the present invention is configured as described above, the polishing tool can move forward and backward at the same time, and move forward and backward at the same time in the transverse direction. Moreover, this reciprocating motion and rocking motion are performed synchronously by a single electric motor, and the locus of the polishing tool can be set in a shape that combines curved and linear motion, so that only a portion of the contact area between the polishing tool and the object being polished can be set. The contact area can be evenly touched without concentrating on the area. Therefore, scratches, uneven wear, etc. are extremely unlikely to occur at the contact portion of the workpiece, and polishing can be performed in accordance with the shape of the polished part. Furthermore, since reciprocating motion and rocking motion are possible with a single electric motor, it is possible to reduce the weight and size of the device.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a sectional view, FIG. 2 is a sectional view taken along the line A-A of FIG. 1 with the front lid removed, and FIG. FIG. 4 is an enlarged front view of the eccentric rotating part, FIG. 4 is a reciprocating motion curve diagram of the fixed spindle, FIG. 5 is a swinging motion diagram of the fixed spindle, and FIG. 6 is a locus diagram of the polishing tool.・Electric motor (4)・・・Eccentric shaft・Mounting member (6)・Eccentric collar・Mounting recess (8)・・Insertion recess・Crankshaft (13)・・Joint shaft・Polishing tool
(15)・Fixed spindle・Ball joint main arm (18・Rotating shaft (28・Cam shaft (34) Concentric interior (37) Concave part (42・Phase correction collar timing pulley・Timing belt trend diagram, 1)・( 5), (7), (11), (14), (16), (17), (20), 33), 35) (36)... 38) 43), 44) (45)... 46 )・・Mounted body・Swinging piece・Eccentric rotation part・Convex part・Transmission member Fig. 5 Rocking movement curve of fixed spindle Fig.

Claims (7)

[Claims] (1) Electric polishing characterized by consisting of a fixed spindle that moves the polishing tool forward and backward by the rotational force of an electric motor, and a main arm that is attached to the fixed spindle so as to be able to move forward and backward and that swings by the rotational force of the electric motor. Device. (2) Connect the crankshaft so that it can rotate eccentrically to an eccentric shaft that is connected to the electric motor and rotates, and connect a joint shaft to this crankshaft in a direction that intersects with the axial direction of the crankshaft. A fixed spindle for fixing the polishing tool is swingably connected to a joint shaft that moves forward and backward as it rotates, and the main arm, on which this fixed spindle is attached so that it can move forward and backward, is rotated through the rotating shaft on the mounting body. The main arm is movably connected and fixedly connected to a rotating swing piece via a rotation shaft, and the electric motor is connected via a transmission member to a cam shaft for eccentrically rotating the swing piece. An electric polishing device characterized in that a swinging piece is moved in a pendulum manner in synchronization with the advance and retreat of a fixed spindle. (3) The eccentric shaft consists of a mounting member, an eccentric collar inserted into the mounting member so that it can be rotated and fixed, and a phase correction collar that is rotatably and fixedly mounted on the mounting member. The axis of the mounting recess is eccentric from the axis of the mounting member, and the eccentric collar to be inserted into the mounting recess of the mounting member is formed with an insertion recess whose axis is eccentric from the axis of the eccentric collar. The crankshaft is mounted in this insertion recess, and the amount of eccentricity of the crankshaft can be adjusted by adjusting and rotating the mounting member within the eccentric collar, and this mounting member can also be rotated within the phase correction collar. 3. The electric polishing device according to claim 2, wherein the phase of the swinging piece can be adjusted by doing so. (4) The electric polishing apparatus according to claim 2, wherein the joint shaft is rotatably connected to the fixed spindle via a ball joint. (5) The camshaft has concentric inner parts formed on both sides of the eccentric rotation part, a convex part protruding from the concentric circle at one end, and a concave part concave from the concentric circle at the other end. The electric polishing apparatus according to claim 2, characterized in that: (6) The electric polishing apparatus according to claim 2, wherein the transmission member is formed by a pair of timing pulleys and a timing belt. (7) The electric polishing apparatus according to claim 2, wherein the transmission member is formed by a pair of gears.