TWI630984B - Workbench - Google Patents

Abstract

The miniaturization of the table device that plots the weight member.

Towards The weight member that reciprocates in the opposite direction of the table has a pair of side weight members disposed on the left and right sides of the table as viewed from the reciprocating direction.

Description

Workbench Field of invention

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a table apparatus, and more particularly to a table apparatus primarily for use in a work machine having a reciprocable table.

Background of the invention

The table device that reciprocates the table on the base table vibrates due to the inertia of the table in the direction of movement of the end of the stroke. In order to reduce the vibration, it is proposed to provide a weight member that reciprocates on the base in a direction opposite to the table and offsets the inertia of the table by the inertia of the weight member (for example, Patent Documents 1, 2).

Advanced technical literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2002-120146

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2003-53663

Summary of invention

The weight component in the conventional workbench device is used to avoid The table is placed at a position away from the table, and is set to have a reciprocating range that does not overlap with the reciprocating range of the table.

Therefore, in the conventional table device, the base unit is increased in size, and the drive device for reciprocating the table and the weight member is also increased in size, and it is difficult to reduce the size.

The problem to be solved by the present invention is to reduce the size of the table device for the weight member.

The table device of the present invention has a base (12) including a first linear guide (14) and a second linear guide (16) extending in parallel with a predetermined axial direction; and a table (20) The first linear guide (14) is guided to be movable; the weight member (24) is movable by the second linear guide (16); and the driving device (50, 90) is configured to The table (20) and the weight member (24) reciprocate in opposite directions, and the weight member (24) has a pair of sides disposed on the left and right sides of the table (20) as viewed in the axial direction. Side weights (26, 28).

According to this configuration, the reciprocating range (section) of the side weight members (26, 28) overlaps with the reciprocating range (section) of the table (20). Thereby, the base (12) can be miniaturized.

Preferably, the weight device (24) further has a pair of end weight members (30, 32), the pair of end weight members (30, 32) from the foregoing Viewed in the axial direction, the front and rear sides of the table (20) are disposed, and the two side weight members (26, 28) are coupled to each other.

According to this configuration, the end weight members (30, 32) share the configuration and reconstruction. A portion of the weight of the piece (24) allows the side weight members (26, 28) to be miniaturized.

Preferably, the weight member (24) of the present invention is such that the weight member (24) is formed by the pair of side weight members (26, 28) and the pair of end weight members (30, 32). The central portion has a frame shape of an opening (34), and the table (20) is reciprocally disposed in the opening (34).

According to this configuration, the weight member (24) can be disposed in a balanced manner around the table (20), and the table device can be downsized.

Preferably, the upper surface (20A) of the table (20) is located above the upper surface (24A) of the weight member (24).

According to this configuration, the tool machined on the table (20) does not interfere with the weight member (24).

In the table apparatus of the present invention, it is preferable that the first linear guide (14) and the second linear guide (16) are substantially flush with each other.

According to this configuration, the height of the base (20) can be reduced as compared with the case where the first linear guide (14) and the second linear guide (16) are disposed at different heights.

Preferably, the driving device of the table device of the present invention has a crank shaft (50) and a first crank pin (54) and a second crank pin (58) having a rotational phase difference of 180 degrees from each other; a connecting rod (70) connecting the first crank pin (54) and the table (20); and a second link (78) connecting the second crank pin (58) and the weight member (24); And an actuator (90) for rotationally driving the crankshaft (50).

According to this configuration, the drive device can be downsized.

The driving device of the table device of the present invention preferably has a crank mechanism (122) for reciprocating the work table (20), and a drive belt mechanism (137) including an endless belt (136). The endless annulus (136) is wound between a plurality of pulleys (133, 134), and the gap between the pulleys (133, 134) is formed to extend in the same direction as the moving direction of the table (20). Two endless belt extensions (136A, 136B) parallel to each other, and one of the two endless belt extensions (136A) is coupled to the table (20), and the other (136B) is coupled to the weight member. (24); and an actuator (124) for driving the crank mechanism (122).

According to this configuration, the crank mechanism (122) is driven by the actuator (124), the table (20) reciprocates, and the drive belt mechanism (137) is driven by the table (20) to be a weight member ( 24) Reciprocating movement, the reciprocating movement of the table (20) and the reciprocating movement of the weight member (24) are often correctly synchronized.

Preferably, the crank mechanism (122) of the table device of the present invention has a rotating member (102) that is rotationally driven by the actuator (90), and is rotatable toward a radial direction of the rotating member (102). A variable crank pin (116) disposed at a position and a connecting rod (118) connectable to the variable crank pin (116) and the table (20).

According to this configuration, the reciprocating stroke of the table (20) can be variably set.

According to the table apparatus of the present invention, at least a part of the reciprocating range of the side weight members is overlapped with the reciprocating range of the table, so that the base can be miniaturized.

10‧‧‧Working abutments

12‧‧‧Abutment

14‧‧‧Inside rail

16‧‧‧Outer rail

18‧‧‧ rolling guides

20‧‧‧Workbench

22‧‧‧ rolling guides

24‧‧‧weight components

26‧‧‧Side side weights

28‧‧‧Side side weights

30‧‧‧End weights

32‧‧‧End weights

34‧‧‧ openings

38‧‧‧ center axis

40‧‧‧Ball bearings

44‧‧‧ center axis

46‧‧‧Ball bearings

50‧‧‧ crankshaft

54‧‧‧1st crank pin

58‧‧‧2nd crank pin

60‧‧‧ crank arm

70‧‧‧1st link

72‧‧‧Ball bearings

74‧‧‧ highlights

76‧‧‧Links

78‧‧‧2nd link

80‧‧‧Ball bearings

82‧‧‧ highlights

84‧‧‧Links

86‧‧‧ driven pulley

88‧‧‧Installation board

90‧‧‧Electric motor (actuator)

92‧‧‧ Output shaft

94‧‧‧ drive pulley

96‧‧‧ driven pulley

100‧‧‧ center axis

102‧‧‧Rotating components

104‧‧‧Sliding parts

106‧‧‧ nuts

108‧‧‧ screw

110‧‧‧ gears

112‧‧‧Void gear

114‧‧‧ hexagonal hole

116‧‧‧Variable crank pin

118‧‧‧ Connecting rod

120‧‧ ‧ sales

122‧‧‧Crank mechanism

123‧‧‧Electric motor (actuator)

124‧‧‧ Output shaft

125‧‧‧ drive pulley

127‧‧‧Axis

128‧‧‧Axis

133‧‧‧ Pulley

134‧‧‧ Pulley

136‧‧‧ Endless belt

136A‧‧‧Ring extension

136B‧‧‧Annulus extension

137‧‧‧Drive belt mechanism

140‧‧‧Links

142‧‧‧Fixed tablets

144‧‧‧Tensor

146‧‧‧ bearing block

148‧‧‧Adjustment screw

150‧‧‧ long hole

152‧‧‧ bolt

Fig. 1 is a perspective view showing a first embodiment of a table device according to the present invention.

Fig. 2 is a plan view showing the stage device of the first embodiment.

Fig. 3 is a longitudinal sectional view of the table device of the first embodiment.

Fig. 4 is a perspective view showing a second embodiment of the table device of the present invention as seen from the right side.

Fig. 5 is a perspective view of the table device of the second embodiment as seen from the left side.

Fig. 6 is a perspective view of the table device of the second embodiment as seen from the lower side.

Detailed description of the preferred embodiment

Embodiment 1 of the table device of the present invention will be described below with reference to Figs. 1 to 3 . Furthermore, the X-axis, the Y-axis, and the Z-axis in the following description are based on the standard coordinate axis of the machine tool.

The table device 10 is used for a grinding disc or the like and has a box-shaped base (base) 12. An inner rail (first linear guide) 14 and an outer rail (second linear guide) 16 that linearly extend in parallel with one axial direction (Z-axis direction) are attached to the upper portion of the base 12 . The inner rail 14 is located on the inner side in the left-right direction of the outer rail 16 as viewed in the Z-axis direction. The inner rail 14 and the outer rail 16 are provided at intervals in the X-axis direction, and are formed on the same surface in a pair, and the respective extending sections are repeated over the entire area.

The table 20 having a rectangular parallelepiped shape is movably engaged with the pair of inner guide rails 14 in the Z-axis direction by a rolling guide 18 having balls held by a holder (not shown).

The weight member 24 is movably engaged with the pair of outer rails 16 in the Z-axis direction by the rolling guide 22 having the balls held by the holder (not shown).

The weight member 24 has one pair of side weight members 26 and 28 disposed on the left and right sides of the table 20 in the Z-axis direction and longer in the Z-axis direction, and is disposed on the table from the Z-axis direction. Before and after 20, the side weight members 26 and 28 are coupled to one another to the end weight members 30 and 32, and are composed of a single plate. The weight of the weight member 24 is preferably equal to the weight of the table 20 including the chucking device provided on the table 20, and may be larger than the weight of the table 20 in consideration of the weight of the workpiece.

The weight member 24 has a rectangular frame shape having a rectangular opening 34 at the center portion by the side weight members 26 and 28 and the end weight members 30 and 32. The table 20 is placed in the opening 34. The inner dimension of the opening 34 in the X-axis direction is slightly larger than the outer dimension of the table 20 in the X-axis direction, and the inner dimension of the opening 34 in the Z-axis direction is larger than the maximum stroke of the reciprocating movement of the table 20 in the X-axis direction (set stroke) ) Slightly larger. Thereby, the table 20 does not collide (interfere) with the weight member 24 even if it is disposed in the opening 34, and can reciprocate in the X-axis direction.

As shown in FIG. 3, the table 20 has a larger dimension (height dimension) in the Y-axis direction than the weight member 24, whereby even if the inner rail 14 and the outer rail 16 are formed on the same surface, the upper surface 20A of the table 20 It is located above the upper surface 24A of the weight member 24 (refer to FIG. 3). Thereby, the processing tool (not shown) such as the grinding wheel that is ground on the table 20 does not interfere with the weight member 24. In this case, since the inner rail 14 and the outer rail 16 are formed on the same surface, the inner rail 14 and the outer rail 16 are disposed. In the case of different heights, the size of the base 12 in the Y-axis direction can be reduced.

As shown in FIG. 3, one of the wall portions 12A of the base 12 (left side) supports the central shaft 38 to be rotatable about the X axis by the double row of ball bearings 40, and the aforementioned central shaft 38 is inserted into the wall portion. 12A and bearing hole 36 extending in the X-axis direction. The other wall portion 12B of the base 12 opposite to the wall portion 12A is supported by the double row of ball bearings 46 for supporting the central shaft 44 to be rotatable about the X axis, and the aforementioned central shaft 44 is inserted into the wall portion 12B and is formed at X A bearing hole 42 extending in the axial direction. The central axes 38 and 44 are concentric on the X-axis.

A crank shaft 50 is disposed in an internal space between the wall portions 12A and 12B of the base 12 . The crankshaft 50 extends in the X-axis direction, and has a structure in which the crank arm 52, the first crank pin 54, the crank arm 56, the second crank pin 58, and the crank arm 60 are sequentially provided from the left side to the right side. The crank arm 52 on the left side is fixed to the center shaft 38, and the crank arm 60 on the right side is fixed to the center shaft 44. Thereby, both ends of the crankshaft 50 are supported by the base 12, and the axes of the central axes 44 and 44 can be rotated about the axis of the X-axis.

The first crank pin 54 is located between the crank arm 52 on the left side and the crank arm 56 in the middle, and the second crank pin 58 is located between the crank arm 56 in the middle and the crank arm 60 on the right side. The first crank pin 54 and the second crank pin 58 have a rotational phase difference of 180 degrees around the center of rotation of the crankshaft 50, and the eccentric amount (crank arm length) of both sides is the same.

One end portion of the first link 70 is coupled to the first crank pin 54 so as to be rotatable relative to the ball bearing 72. The other end portion of the first link 70 is rotatably coupled to the protruding piece 74 provided at the bottom of the table 20 by a coupling pin 76 (see Fig. 1). One end of the second link 78 is via a ball bearing 80 is coupled to the second crank pin 58 in a relatively rotatable manner. The other end portion of the second link 78 is rotatably coupled to the protruding piece 82 provided at the bottom of the weight member 24 by a coupling pin 84 (see FIG. 1). The rod lengths of the first link 70 and the second link 78 are the same as each other.

The outer end of the center shaft 38 protrudes outward from the base 12. The driven pulley 86 is fixed to the protruding portion. The motor 90 is mounted to the base 12 by a mounting plate 88. The drive pulley 94 is fixed to the output shaft 92 of the motor 90. The endless drive belt 96 is wound around the drive pulley 94 and the driven pulley 86. Thereby, the crankshaft 50 is rotationally driven about the axis of the X-axis direction by the motor 90.

By rotating the crankshaft 50, the table 20 and the weight member 24 are synchronized with each other to reciprocate the base 12 in the Z direction. The reciprocating movement is performed by the first crank pin 54 and the second crank pin 58 having a rotational phase difference of 180 degrees around the center of rotation of the crankshaft 50, and opposite to each other, and the first crank pin 54 and the second crank pin The eccentricities of 58 are identical to each other, thereby proceeding with the same stroke. Thereby, the inertia of the table 20 at the end of the stroke is offset from the time when the inertia of the weight member 24 is synchronized with each other, and the vibration of the base 12 caused by the inertia is reduced.

The side weight members 26 and 28 are disposed on the right and left sides of the table 20 as viewed in the Z-axis direction, so that the reciprocating range of the side weight members 26 and 28 is repeated in the reciprocating range of the table 20. In other words, the reciprocating range of the table 20 and the reciprocating range of the side weight members 26 and 28 overlap in the Z-axis direction, so that the dimension of the base 12 in the Z-axis direction can be reduced as compared with the case where there is no overlap.

Since the side weight members 26 and 28 are located on the outer side of the table 20, This side weight members 26 and 28 do not affect the size setting of the table 20. Thereby, after the size of the table 20 is set to the minimum necessary size, the weights of the side weight members 26 and 28 are set in accordance with the weight of the table 20 which is required to be the minimum size.

The 1/2 point of the reciprocating range of the table 20 (reciprocating stroke) and the reciprocating range of the weight member 24 (reciprocating stroke) are located at the same position in the Z-axis direction, so that one can be used The crank mechanism of the crankshaft 50 synchronously drives the table 20 and the weight member 24. Thereby, the driving device of the table 20 including the crank mechanism and the weight member 24 is miniaturized.

Since the size reduction of the end weight members 30 and 32 and the base 12 in the Z-axis direction is reversed, the dimension in the Z-axis direction should be as small as possible. However, since the end weight members 30 and 32 increase the overall weight of the weight member 24, the end weight members 30 and 32 contribute to the reduction in the X-axis direction of the side weight members 26 and 28. Thereby, the design freedom of the dimension of the Z-axis direction and the X-axis direction of the base 12 is increased, and when the dimension of the base 12 in the Z-axis direction is reduced, it is only necessary to reduce the Z of the end weight members 30 and 32 as much as possible. The size in the axial direction can be made up by the side weight members 26 and 28 to make up the necessary weight of the weight member 24. When the size of the base 12 in the X-axis direction is reduced, the side weight members 26 are reduced as much as possible. And the size of the X-axis direction of 28 and 28 can complement the weight of the weight member 24 by the end weight members 30 and 32.

The side weight members 26 and 28 are symmetrical on the left and right sides of the table 20 as viewed in the Z-axis direction, and the end weight members 30 and 32 are symmetrical on the front and rear sides of the table 20 as viewed from the Z-axis direction. Therefore, by the weight member 24, the bias load can be suppressed from acting on the base 12, and mechanical precision due to deformation of the base 12 can be avoided. reduce.

Next, a second embodiment of the table device of the present invention will be described with reference to Figs. 4 to 6 . In addition, in FIGS. 4 to 6, parts corresponding to those in FIGS. 1 to 3 are denoted by the same reference numerals as those in FIGS. 1 to 3, and description thereof will be omitted.

Similarly to the first embodiment, the weight member 24 has a rectangular frame shape having a rectangular opening 34 at the center portion by the side weight members 26 and 28 and the end weight members 30 and 32. The opening 34 is provided with a table 20.

The disk-shaped rotating member 102 is rotatably attached to the base 12 by a central axis 100 extending in the Y-axis direction. The slider 104 is attached to the rotating member 102 so as to be movable in the radial direction of the rotating member 102. The slider 104 is fixed with a feed nut 106. A feed screw 108 screwed to the feed nut 106 is rotatably mounted to the rotating member 102. By the rotation of the feed screw 108, the slider 104 moves in the radial direction of the rotating member 102, and the position of the slider 104 is determined. The gear 110 is fixed to the feed screw 108, and the snail gear 112 that is engaged with the gear 110 is rotatably mounted to the rotating member 102. A hexagonal hole 114 is formed at an end portion of the snail gear 112, and the snail gear 112 is rotated by an operation of a hexagonal wrench (not shown) that is engaged with the hexagonal hole 114.

The variable crank pin 116 is fixed to the slider 104. The variable crank pin 116 extends in the Y-axis direction and is displaced by the slider 104 toward the radial direction of the rotating member 102, that is, the position of the arrangement. One end of the link 118 is rotatably coupled to the variable crank pin 116. The other end of the link 118 is rotatably coupled to a pin 120 that is fixed to the bottom of the table 20.

Thus, the crank mechanism 122 that reciprocates the table 20 is constructed. The crank mechanism 122 changes the crank arm length by the displacement of the variable crank pin 116. The reciprocating stroke of the table 20 is varied by the change in the crank arm length of the crank mechanism 122. That is, the crank mechanism 122 can quantitatively and variably set the reciprocating stroke of the table 20. This stroke adjustment is performed by the rotation operation of the snail gear 112 of a hex wrench (not shown).

The base 12 is mounted with an electric motor 123. The drive pulley 125 is fixed to the output shaft 124 of the motor 123. The driven pulley 130 is fixed to the center shaft 100. The endless drive belt 132 is wound around the drive pulley 125 and the driven pulley 130. Thereby, the rotating member 102 is rotationally driven about the central axis by the motor 123.

Two shafts 12 on the base 12 which are separated in the Z-axis direction are fixed to the shafts 127 and 128 which respectively extend in the Y-axis direction. The pulleys 133 and 134 of the same outer diameter are rotatably mounted to the shafts 127 and 128. The endless belt 136 is wound around the pulleys 133 and 134, and the belt mechanism 137 is constituted by the pulleys 133 and 134 and the endless belt 136.

The endless belt 136 has two belt extending portions 136A and 136B extending in the same direction in the moving direction of the table 20, that is, parallel to the Z-axis direction, between the pulleys 133 and 134. The endless belt extending portions 136A and 136B are linearly extending inter-pulse paths, and the lengths of the annular belt extending portions 136A and 136B in the Y-axis direction are greater than or equal to the maximum stroke of the reciprocating movement of the weight member 24.

One of the loop extensions 136A is coupled to the lower bottom of the table 20 by a web 138. The other endless belt extending portion 136B is coupled to one of the weight members 26 of the weight member 24 by the connecting piece 140. The connection between the endless belt extension portion 136A of the connecting piece 138 and the table 20 is at the 1/2 point of the reciprocating stroke of the table 20, and the end of the belt is extended. The portion of 136A in the 1/2 direction of the Z-axis direction is connected to the surface of the table 20. The connection of the endless belt extending portion 136B of the connecting piece 140 to the weight member 24 is the Z-axis of the endless belt extending portion 136A when the weight member 24 is at a point 1/2 of its own reciprocating stroke. The portion of the direction of 1/2 is connected to the surface of the table 20.

The fixing piece 142 is fixed to the endless belt extending portion 136B at a position adjacent to the connecting piece 140 in the Z-axis direction. A tension regulating piece 144 including a portion extending toward the connecting piece 140 and overlapping the connecting piece 140 in the X-axis direction is fixed to the fixing piece 142.

The adjustment screw 148 having a head is rotatably attached to the coupling piece 140 by the bearing block 146. The adjusting screw 148 is screwed into a screw hole (not shown) formed in the tension adjusting piece 144, and the tension adjusting piece 144 is moved in the Z-axis direction by the rotation of the feeding screw. The tension of the endless annulus 136 is adjusted by the movement of the tension adjusting piece 144 in the Z-axis direction. This tension adjustment is performed without hindering the straightness of the necessary endless belt extension 136B.

A plurality of long holes 150 long in the Z-axis direction are formed in the X-axis direction to form the tension adjusting piece 144. The bolts 152 are disposed in the long holes 150, and the bolts 152 are screw holes (not shown) that are screwed into the coupling piece 140, whereby the tension adjusting piece 144 whose tension adjustment is completed is fixed to the long holes 150.

When the rotary member 102 is rotationally driven by the motor 123, the table 20 reciprocates in the Z direction on the base 12 by the crank mechanism 122. The endless endless belt 136 is driven by the reciprocating movement of the table 20, and the endless belt extending portions 136A and 136B reciprocate in directions opposite to each other in the Z-axis direction. Since the endless annulus 136 is driven by the reciprocating movement of the table 20, the annulus extension 136A, The reciprocating stroke of 136B is the same as the reciprocating stroke of the table 20.

Thereby, the weight member 24 moves in the Z-axis direction in a direction opposite to the moving direction of the table 20 in synchronization with the reciprocating movement stroke of the table 20 in synchronization with the reciprocating movement of the table 20. According to this operation, in the same manner as in the first embodiment, the inertia of the table 20 at the end of the stroke and the time when the inertia of the weight member 24 are synchronized with each other are canceled, and the vibration of the base 12 due to the inertia is reduced.

In the second embodiment, since the weight member 24 is reciprocated from the table 20, the reciprocating movement of the table 20 and the reciprocating movement of the weight member 24 are often correctly synchronized.

In the second embodiment, since the side weight members 26 and 28 are disposed on the right and left sides of the table 20 as viewed from the Z-axis direction, the reciprocating range of the table 20 and the side weight members 26 and 28 are also provided. The reciprocating range overlaps in the Z-axis direction, and the size of the base 12 in the Z-axis direction can be reduced as compared with the non-overlapping aspect.

The above is a preferred embodiment of the present invention, and it is to be understood that the present invention is not limited thereto, and may be appropriately modified without departing from the spirit and scope of the invention.

For example, the driving device that reciprocates the table 20 and the weight member 24 is not limited to the crank mechanism, and may be a transmission belt or the like. Although the reciprocating movement of the table 20 and the reciprocating movement of the weight member 24 must be synchronized with each other and in opposite directions, the reciprocating movement of the table 20 and the reciprocating movement of the weight member 24 can also be performed by individual driving means. Furthermore, the strokes of the table 20 and the weight member 24 may not necessarily be the same.

Alternatively, the end weight members 30 and 32 may be omitted and the side weight members 26 and 28 may not be coupled to each other. At this time, a driving device that drives the side weight members 26 and 28 in synchronization with each other is used.

Further, the constituent elements described in the above embodiments are not necessarily all necessary, and may be appropriately selected and selected without departing from the gist of the present invention.

Claims (4)

A table device comprising: a base having a first linear guide and a second linear guide extending in parallel with a predetermined axial direction; and the table movable by the first linear guide; The weight member is movable by the second linear guide; and the driving device reciprocates the table and the weight member in a reverse direction, and the weight member is coupled by a pair of sides a weight and a pair of end weight members having a frame shape having an opening at a central portion thereof, wherein the table is reciprocally disposed in the opening, and the pair of side weight members are disposed in the axial direction In the left and right sides of the table, the pair of end weights are disposed in front and rear of the table as viewed in the axial direction, and the two side weights are coupled to each other, and the driving device has a plurality of pulleys. Disposed on the lower side of the table and the weight member, rotatable about an axis extending in the up-and-down direction; and an endless belt wrapped between the pulleys and formed between the pulleys Towards the aforementioned workbench Two endless belt extending portions extending in the same direction and parallel to each other, and one of the two endless belt extending portions is located below the workbench, and the working table is coupled to the two annular belts The other end belt extension of the extension portion is located below the side weight member of one of the pair of side weight members, These side weights are attached to the side. The table device of claim 1, wherein the table device is a table device for grinding a disk, and the first linear guide and the second linear guide extend in a horizontal direction, and the upper surface of the table is located at a ratio The upper surface of the weight member is also on the upper side. A table apparatus according to claim 1 or 2, wherein said first linear guide and said second linear guide are located on the same surface. The table device of claim 1 or 2, wherein the driving device comprises: a crank mechanism for reciprocating the work table; and an actuator for driving the crank mechanism, the crank mechanism having: A rotating member that is rotationally driven by an actuator, a variable crank pin that is displaceable in a radial direction of the rotating member, and a link that can connect the variable crank pin to the table.