TW201600227A - Polishing machine - Google Patents

Abstract

To provide a polishing machine which achieves vibration reduction. A polishing material holding member (16) in a polishing machine (10) is attached to a drive shaft (22) rotatably around an eccentric axis (25) with respect to a rotational drive center axis (24) of the drive shaft (22) rotationally driven by a vane-type air motor (18), and has a motion restriction part (40) provided at a position apart from the eccentric axis in the direction of a radial axis (38) of the eccentric axis. A pair of guide rollers (42, 43) provided in a body part (12) is disposed such that a first engagement position of one guide roller (42) and the motion restriction part and a second engagement position of the other guide roller (43) and the motion restriction part are disposed so as to be located laterally on the opposite sides of the radial axis (38) with the radial axis therebetween, and when the drive shaft (22) is rotationally driven, restricts the motion of the polishing material holding member (16) such that the polishing material holding member (16) is displaced in the direction of the radial axis (38) while pivoting about a position between the first engagement position and the second engagement position.

Description

Grinder

The present invention relates to a grinder, and more particularly to a grinder for driving an abrasive holding member to which an abrasive is attached by eccentric rotation.

The grinder is an abrasive holding member to which an abrasive is mounted, mounted on a drive shaft that is parallel to a rotational drive central axis of the drive shaft and freely rotatable about an eccentric axis passing through a position away from the rotational drive center axis, and The support restricts the movement of the radiation axis in the left-right direction with respect to the eccentric axis, so that the abrasive material performs an elliptical motion of the combined front-rear motion and the oscillating motion. Since the above-described polishing machine restricts the operation of the polishing material holding member in the left-right direction, the guide roller attached to the main body of the polishing machine is rotatably engaged with the left and right side surfaces of the groove of the polishing material holding member (Patent Document 1).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent No. 5363870

In the above-described conventional polishing machine, the guide rolls are arranged to alternately engage the left and right side faces of the grooves to restrict the left-right direction of the position at which the grooves are formed in the abrasive holding member. Since the guide roller smoothly slides and engages with the groove, the guide roller does not simultaneously engage with the left and right side faces of the groove, and must always be engaged by only one of them. To this end, the diameter of the guide roller is set to be smaller than the lateral width of the groove, and a gap is formed between the guide roller and one side of the groove. Therefore, when the abrasive material holding member is driven, when the guide roller is engaged with one side and moved to the other side, the guide roller collides with the side surface. Further, since the abrasive holding member is driven at a high speed, the collision is continuously generated, and as a result, a large vibration is generated in the grinder.

SUMMARY OF THE INVENTION The present invention is directed to a grinding machine capable of reducing vibration generation in the above conventional grinding machine.

That is, the present invention provides a grinding machine comprising: a main body portion; a motor attached to the main body portion; a drive shaft rotatably driven by the motor; and a polishing material holding member mounted with an abrasive material mounted parallel to the drive shaft An abrasive holding member of the above-described drive shaft that rotationally drives a central axis and is freely rotatable about an eccentric axis passing through a position away from the rotational drive center axis, and has a direction of a radial axis of the eccentric axis An operation regulating portion provided at a position away from the eccentric axis; and a pair of guiding members attached to the main body portion at a position apart from the rotation driving center axis, and a pair of guiding members engaged with the operation restricting portion a first engagement position at which one of the guide members engages with the operation restriction portion and a second engagement position at which the other guide member engages with the operation restriction portion are disposed on the left and right sides of the radiation axis with the radiation axis interposed therebetween On the opposite side, when the drive shaft is rotationally driven, the polishing material holding member is axially displaced in a direction between the first engagement position and the second engagement position, and is displaced in the direction of the radiation axis. The operation of the above-described abrasive holding member is restricted.

In the grinding machine, since the pair of guide members are disposed such that the engagement positions of the respective guide members and the operation restricting portion are located on the opposite sides of the radiation axis, the guide members and the operation restricting portions are often in contact with each other. The action of the abrasive holding member can be restricted. Therefore, the vibration caused by the gap between the guiding member and the motion restricting portion as in the prior art can be reduced.

Preferably, the pair of guiding members are each formed by a guide roller that is rotatable relative to the main body portion.

According to the above configuration, the movement restricting portion can be smoothly rotated and engaged with respect to the guide member, so that the friction between the motion restricting portion and the guide member can be reduced and the vibration can be further reduced.

It is preferable that the rotation center axes of the respective guide rollers are inclined in opposite directions with respect to each other with respect to the above-described rotational drive center axis.

Preferably, the movement is engaged with the pair of guiding members The engaging surface of the restricting portion is inclined with respect to the eccentric axis and is formed to face away from a position at which the abrasive is attached.

According to the above configuration, when the abrasive material is pressed against the material to be polished, not only the attachment portion to the drive shaft but also the engagement portion with the guide member can support the load received by the abrasive member, so that the load can be reduced. This load causes the deflection of the abrasive holding member and disperses the stress applied to the abrasive holding member to prevent breakage of the abrasive holding member.

Preferably, the operation restricting portion has a protruding shape and is sandwiched between the pair of guiding members.

Preferably, at least a portion of the pair of guiding members that engages with the movement restricting portion is formed by an elastic member.

It is preferable that the above-described operation restricting portion of the above-described abrasive holding member is formed by an elastic member.

As described above, the elastic member is used to form the engaging portion between the guiding member and the movement restricting portion, whereby the elastic member can absorb the vibration and further reduce the transmission of the vibration to the main portion.

Specifically, the polishing material holding member includes a first portion having a drive shaft attachment portion attached to the drive shaft, and an upper surface on which the operation restriction portion is provided to face the main body portion and opposite to the upper surface The lower portion and the second portion extend from the lower surface of the first portion, and a polishing material mounting portion to which the polishing material is attached is provided at the tip end of the second portion, and the operation can be restricted in the direction of the radiation axis. The portion is positioned between the drive shaft mounting portion and the polishing material mounting portion.

Hereinafter, the grinding machine of the present invention will be described based on the accompanying drawings. Implementation form.

10‧‧‧ Grinder

12‧‧‧ Main body

14‧‧‧Maintenance component installation

16‧‧‧Abrasive material holding member

18‧‧‧blade air motor

20‧‧‧ Output shaft

22‧‧‧Drive shaft

24‧‧‧Rotary drive center axis

25‧‧‧Eccentric axis

27‧‧‧Circular inner surface

28‧‧‧ radial bearings

30‧‧‧Cylinder members

32‧‧‧ screw holes

34‧‧‧ paragraph hole

36‧‧‧Bolts

38‧‧‧radiation axis

40‧‧‧Action Restriction Department

42, 43‧‧ ‧ guide roller

44‧‧‧Wearing materials

46‧‧‧tracheal connection

48‧‧‧Compressed air flow path

50‧‧‧Operator

52‧‧‧Switching valve mechanism

54‧‧‧above

55‧‧‧Under

56‧‧‧ horizontal department

57‧‧‧ front end

58‧‧‧ vertical section

59‧‧‧Abrasion material installation department

60‧‧‧ rib

61‧‧‧ below

62, 63‧‧‧Rotation center axis

64, 65‧‧‧ Rotating engagement surface

68, 69‧‧‧Fixed engagement surface

116‧‧‧(flat) abrasive material holding member

140‧‧‧Action Restriction Department

142, 143‧‧ ‧ guide roller

144‧‧‧Wearing materials

161‧‧‧ below

162, 163‧‧ ‧ rotation center axis

164, 165‧‧‧ Rotating engagement surface

216‧‧‧ (disc shaped) abrasive retaining member

240‧‧‧Action Restriction Department

242, 243‧‧ ‧ guide rollers

244‧‧‧Wearing materials

261‧‧‧ below

262, 263‧‧‧ rotation center axis

268, 269‧‧‧Fixed engagement surface

Fig. 1 is a left side view of a grinder according to an embodiment of the present invention.

Fig. 2 is a front view of the grinder of Fig. 1.

Fig. 3 is a cross-sectional view taken along line III-III of Fig. 2.

Fig. 4 is a top view showing the abrasive holding member and the pair of guide rolls.

Fig. 5 is a schematic view showing the relationship between the guide roller and the operation restricting portion in one of the second embodiments.

Fig. 6 is a schematic view showing the relationship between the guide roller and the operation restricting portion in one of the third embodiments.

Fig. 7 is a left side view of the grinder in a state in which the flat abrasive holding member is attached.

Fig. 8 is a left side view of the grinder in a state in which the disc-shaped abrasive holding member is attached.

The polishing machine 10 according to the embodiment of the present invention includes a main body portion 12 and a polishing material holding member 16 attached to the holding member mounting portion 14 positioned at the lower end of the main body portion 12 as shown in Figs. 1 and 2 . As shown in Fig. 3, a vane type air motor 18 is provided inside the main body portion 12, and a cup-shaped drive shaft 22 is fixed to the lower end of the output shaft 20 of the vane type air motor 18. The drive shaft 22 rotates in line with the axis of the output shaft 20. The drive center axis 24 is rotationally driven. The drive shaft 22 is provided with a circular cross-sectional recess 26 that is parallel to the rotational drive central axis 24 and centered on the eccentric axis 25 at a position away from the rotational drive central axis 24, in which the recess 26 is permeable to the circle A radial bearing 28 of the inner peripheral surface 27 is rotatably mounted with a cylindrical member 30. The inner peripheral surface of the cylindrical member 30 which becomes the inner race of the radial bearing 28 is a screw hole 32 in which the bolt 36 is latched by the step hole 34 of the abrasive holding member 16, thereby holding the abrasive material The member 16 is fixed to the tubular member 30. As described above, the abrasive holding member 16 is mounted to be rotatable around the eccentric axis 25 with respect to the drive shaft 22 that is rotationally driven around the rotational drive center axis 24. The abrasive holding member 16 has an operation restricting portion 40 that extends from the eccentric axis 25 along a radial axis 38 that extends in a predetermined radial direction (radial direction), and the motion restricting portion 40 is provided in the main body portion. The pair of guide rollers 42 and 43 of the holding member mounting portion 14 of the holding member 14 are engaged with each other from both sides, and are restricted from moving in the left-right direction of the operation regulating portion 40. The abrasive material 44 attached to the front end portion of the abrasive holding member 16 is subjected to a reciprocating elliptical motion. In the above-described polishing machine 10, the polishing material 44 that moves back and forth in an elliptical shape is pressed against the material to be polished, and the polishing operation of the material to be polished is performed.

At the rear end of the main body portion 12 (shown at the right end in FIG. 3), a gas pipe connecting portion 46 for connecting a gas pipe extending from a gas pump (not shown) is provided, and compressed air supplied from the connected gas pipe is introduced into the main body portion 12. . The compressed air flow path 48 extending from the air pipe connecting portion 46 to the vane air motor 18 is provided to be rotatably attached to the main body portion 12 The on-off valve mechanism 52 that performs the switching operation of the operating lever 50 controls the supply of the compressed air to the vane air motor 18 by the operation of the operating lever 50 to control the driving and stopping of the vane air motor 18. The vane air motor 18 and the on-off valve mechanism 52 of the grinder 10 are well known to those skilled in the art, and thus detailed description thereof will be omitted.

The abrasive holding member 16 has a horizontal portion 56 having an upper surface 54 extending forward and opposite to the main body portion 12 and a lower surface 55 opposed to the opposite side thereof from the front side (the left and right sides of the third and fourth figures); the vertical portion 58; The front end portion 57 of the lower surface 55 of the horizontal portion 56 extends downward; and the abrasive mounting portion 59 extends forward from the lower end of the vertical portion 58. The abrasive material 44 is attached to the lower surface 61 of the abrasive material mounting portion 59 by an adhesive sealing material. Further, ribs 60 are provided on both side surfaces of the horizontal portion 56, the vertical portion 58, and the polishing material mounting portion 59, and the abrasive holding member 16 has sufficient strength.

The pair of guide rollers 42 and 43 described above are arranged as shown in Fig. 4, and are disposed so as to be positioned on the opposite sides of the radiation axis 38 from each other with a predetermined radiation axis 38 extending from the eccentric axis 25. Further, the respective rotation center axes 62, 63 can be seen from Fig. 2, and when the grinder 10 is displayed from the front, the rotation drive center axis 24 of the drive shaft 22 is inclined toward the opposite directions toward each other in the upward direction. Thereby, the rotation engagement surfaces 64 and 65 of the respective guide rollers 42 and 43 are also inclined with respect to the rotation drive center axis 24, similarly to the rotation center axes 62 and 63 of the respective guide rollers 42 and 43. Further, the direction of the "left and right of the radiation axis 38" herein means a direction perpendicular to the radial axis 38 with respect to the eccentric axis 25. Furthermore, the left side of the drawing on the second drawing is opposite to the right side of the radiation axis 38. Should be, the right side of the drawing corresponds to the left side of the radiation axis 38. Further, the upper side of the drawing surface of Fig. 4 corresponds to the right side of the eccentric axis 25, and the lower side of the drawing surface corresponds to the left side of the eccentric axis 25.

The upper surface 54 of the abrasive holding member 16 is provided with an operation restricting portion 40 made of a rubber material at a position away from the eccentric axis 25 in the direction of the radiation axis 38 of the eccentric axis 25. The operation restricting portion 40 has fixed engagement faces 68 and 69 that engage with the pair of guide rollers 42 and 43, and each of the fixed engagement faces 68 and 69 can be seen from the second figure, and is positioned opposite to the left and right of the radial axis 38. On the side, when the grinder 10 is displayed from the front side, a surface which is inclined in the opposite direction with respect to the eccentric axis 25 (the rotation center axis 24 in FIG. 2) and which is separated from the abrasive mounting portion 59 (shown as Upper side) relative. Further, the inclination angles of the respective engagement engagement faces 68, 69 are set to be the same as the inclination angles of the rotation center axes 62, 63 of the corresponding guide rollers 42, 43. The motion restricting portion 40 has a protrusion shape that protrudes upward, and is sandwiched between the pair of guide rollers 42 and 43. Therefore, the engagement position between the left guide roller 42 and the left fixed engagement surface 68 of the operation restricting portion 40 and the engagement between the right guide roller 43 and the right fixed engagement surface 69 of the operation restricting portion 40 are achieved. The positions are formed on the left and right opposite sides of the radiation axis 38 that are sandwiched by the radiation axis 38.

When the vane type air motor 18 is rotationally driven, the position of the step hole 34 is eccentrically moved with respect to the rotational drive center axis 24, but the position where the operation restricting portion 40 is provided is by a pair of guide rolls. 42 and 43 restrict the movement of the radiation axis 38 in the left-right direction, and the fixed engagement faces 68 and 69 of the operation restricting portion 40 and the respective guide rollers The position between the engagement positions of the 42 and 43 engagement is axially shifted, and the movement is performed in the direction of the radiation axis 38 of the eccentric axis 25. Thereby, the polishing material mounting portion 59 located further forward than the movement restricting portion 40 displayed in the direction of the eccentric axis 25 serves as a reciprocating elliptical motion in which the oscillating motion and the linear motion are combined. Further, the trajectory of the abrasive attaching portion 59 changes depending on the positional relationship between the eccentric axis 25 and the movement restricting portion 40 and the abrasive attaching portion 59. When the motion restricting portion 40 is located at the midpoint of the eccentric axis 25 and the abrasive mounting portion 59 It becomes a circle, but here, the motion including the above circular trajectory is also called an elliptical motion. Further, the trajectory of the abrasive material mounting portion 59 is not elliptical or circular, but has a plurality of twisted shapes.

In the above-described polishing machine 10, the operation regulating portion 40 is engaged and supported by the two guide rollers 42 and 43 at the left and right sides of the radiation axis 38 of the eccentric axis 25, so that the operation restricting portion 40 can be Each of the guide rollers 42, 43 is often in contact without being separated. Thereby, the movement restricting portion 40 does not collide with the guide rollers 42, 43 and the vibration can be greatly reduced.

In the above-described embodiment, as described above, the operation regulating portion 40 of the polishing material holding member 16 is formed of a rubber material of the elastic member. Therefore, when the polishing material holding member 16 operates, it is sandwiched between the pair of guide rollers 42 and 43. The movement restricting portion 40 is elastically deformed while being engaged with the guide rollers 42 and 43, and is always in contact with the guide rollers 42 and 43. Further, the operation regulating portion 40 is formed of a rubber material, thereby absorbing the vibration of the polishing material holding member 16, and further reducing the transmission of the vibration to the main body portion 12. Furthermore, in this embodiment, the operation regulating portion 40 is an elastic member. Although formed, the elastic engagement members may form the rotational engagement faces 64, 65 of the guide rollers 42, 43.

As described above, the fixed engagement surfaces 68 and 69 of the operation restricting portion 40 are opposed to the obliquely upward direction, and the rotational engagement surfaces 64 and 65 of the guide rollers 42 and 43 are obliquely downward, so that the pair of guide rollers 42 and Not only the force from the left-right direction of the abrasive holding member 16 but also the upper force is received. Therefore, the upward force received by the abrasive holding member 16 when the polishing material 44 is pressed against the workpiece during the polishing operation is not only the connection portion with the drive shaft 22 but also the operation restriction portion 40. Therefore, the stress on the abrasive holding member 16 is dispersed to make the abrasion of the abrasive holding member 16 difficult. Further, since the deflection of the polishing material holding member 59 in the vertical direction can be reduced, the change in the contact angle between the polishing material 44 and the material to be polished when the polishing material 44 is pressed against the material to be polished is reduced, and the polishing is performed. The contact state of the material and the material to be polished can also be ground in a more stable state.

In the above embodiment, the pair of guide rollers 42, 43 are obliquely attached to the rotation center axes 62, 63 so that the inclination angles of the rotation engagement faces 64, 65 and the inclination angles of the fixed engagement faces 68, 69 of the operation restriction portion 40 are inclined. Become the same level. Other embodiments are shown in Fig. 5, and the central axes of rotation 162, 163 may be parallel to the rotational drive central axis 24 of the drive shaft 22, using, for example, the rotational engagement faces 164, 165 inclined relative to the central axis of rotation 162, 163. Guide rollers 142, 143 of conical faces. Further, in still another embodiment, the operation restricting portion 240 is not formed in a protruding shape, but as shown in Fig. 6, a fixed engaging surface having a shape of a concave portion and engaging the left and right side faces with the guide rollers 242 and 243 may be provided. 268, 269. at this time, Each of the fixed engagement faces 268 and 269 is formed to face each other in the left-right direction and to face upward. Further, the guide rollers 242, 243 are such that their rotational drive centers 262, 263 are mounted close to each other so as to be inclined in opposite directions with respect to the rotational drive center axis 24 of the drive shaft 22.

The abrasive holding member 16 of the grinder 10 can be easily removed by the removal of the bolt 36, or can be replaced with another abrasive holding member as needed. For example, Fig. 7 shows that the flat material holding member 116 can be replaced. Similarly to the polishing material holding member 16 of FIGS. 1 to 4, the abrasive holding member 116 is rotatably attached to the drive shaft 22, and the operation regulating portion 140 is sandwiched between the pair of guide rollers 42 and 43. Therefore, the abrasive 144 attached to the lower surface 161 of the abrasive holding member 116 performs a reciprocating elliptical motion. Alternatively, as shown in Fig. 8, the disc-shaped abrasive holding member 216 may be replaced. The abrasive holding member 216 does not include the operation restricting portions 40 and 140 that engage with the pair of guide rollers 42 and 43 and is in a free state without being restricted from rotating around the eccentric axis 25 . The abrasive holding member 216 is driven around the driving rotation center axes 62, 63 of the driving shaft 22 when the blade type air motor 18 is driven in a state where the polishing material 244 attached to the lower surface 261 is pressed against the material to be polished. While rotating, the abrasive 244 rotates around the eccentric axis 25 while receiving the centrifugal force from the material to be polished and the abrasive holding member 216 itself.

In this embodiment, the guide rollers 42 and 43 are used as the guide members for guiding the operation regulating portions 40 and 140 of the abrasive holding members 16 and 116, whereby the operation regulating portions 40 and 140 are rotatably supported and the operation restricting portion is lowered. Sliding friction between 40 and 140. However, it is not necessary to use the guide rollers 42 and 43 as the guide member. For example, the members of the low-friction material may be slidably supported by the operation regulating portions 40 and 140, or the movement of the operation restricting portions 40 and 140 may be flexibly elastic. Deformed components to support.

10‧‧‧ Grinder

12‧‧‧ Main body

14‧‧‧Maintenance component installation

16‧‧‧Abrasive material holding member

18‧‧‧blade air motor

20‧‧‧ Output shaft

22‧‧‧Drive shaft

24‧‧‧Rotary drive center axis

25‧‧‧Eccentric axis

26‧‧‧ recess

27‧‧‧Circular inner surface

28‧‧‧ radial bearings

30‧‧‧Cylinder members

32‧‧‧ screw holes

34‧‧‧ paragraph hole

36‧‧‧Bolts

40‧‧‧Action Restriction Department

43‧‧‧guide roller

44‧‧‧Wearing materials

46‧‧‧tracheal connection

48‧‧‧Compressed air flow path

50‧‧‧Operator

52‧‧‧Switching valve mechanism

54‧‧‧above

55‧‧‧Under

56‧‧‧ horizontal department

57‧‧‧ front end

58‧‧‧ vertical section

59‧‧‧Abrasion material installation department

60‧‧‧ rib

61‧‧‧ below

Claims (8)

A grinding machine comprising: a main body; a motor mounted to the main body; a drive shaft rotatably driven by the motor; an abrasive holding member mounted with an abrasive material mounted on a rotational drive central axis parallel to the drive shaft and An abrasive holding member of the drive shaft that is freely rotatable around an eccentric axis at a position away from the rotational drive center axis, and has an action limit disposed at a position away from the eccentric axis in a direction of a radial axis of the eccentric axis And a pair of guiding members attached to the main body portion at a position apart from the rotation drive center axis, and a pair of guiding members engaged with the operation restricting portion engage one of the guiding members with the operation restricting portion When the first engagement position and the other engagement member are engaged with the operation restriction portion, the second engagement position is disposed on the opposite side of the radial axis of the radiation axis, and when the drive shaft is rotationally driven, The polishing material holding member has a position between the first engagement position and the second engagement position. The spindle is axially displaced and displaced in the direction of the radial axis to restrict the action of the abrasive holding member. The polishing machine according to the first aspect of the invention, wherein the pair of guiding members are each formed by a guide roller that is rotatable with respect to the main body portion. The grinding machine according to the second aspect of the invention, wherein the center axis of rotation of each of the guide rollers is opposite to the central axis of the rotation drive This opposite direction is inclined. The grinding machine according to any one of the first to third aspect, wherein the engagement surface of the operation restricting portion that is engaged with the pair of guide members is inclined with respect to the eccentric axis, and is formed and formed It is opposite from the direction in which the abrasive material is installed. The polishing machine according to the first aspect of the invention, wherein the operation regulating portion has a protruding shape and is sandwiched between the pair of guiding members. The polishing machine according to claim 1, wherein at least a portion of the pair of guiding members that engages with the operation regulating portion is formed by an elastic member. The polishing machine according to the first aspect of the invention, wherein the operation regulating portion of the polishing material holding member is formed by an elastic member. In the polishing machine according to the first aspect of the invention, the polishing material holding member includes a first portion, and has a drive shaft attachment portion attached to the drive shaft, and the operation restriction portion is provided to face the main body portion. The upper surface and the lower surface opposite to the opposite side of the upper surface, and the second portion extend from the lower surface of the first portion, and a polishing material mounting portion to which the polishing material is attached is provided at the front end of the second portion. The direction of the radiation axis is to position the operation restricting portion between the drive shaft mounting portion and the polishing material mounting portion.