CN100545472C - Motion guide device, workbench device and shock absorption method for motion guide device - Google Patents
Motion guide device, workbench device and shock absorption method for motion guide device Download PDFInfo
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- CN100545472C CN100545472C CNB2005800387263A CN200580038726A CN100545472C CN 100545472 C CN100545472 C CN 100545472C CN B2005800387263 A CNB2005800387263 A CN B2005800387263A CN 200580038726 A CN200580038726 A CN 200580038726A CN 100545472 C CN100545472 C CN 100545472C
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- track component
- vibration damper
- moving member
- rolling element
- oil
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Abstract
本发明提供一种运动导向装置，其具有不同于传统减震结构的新型减震结构。本发明设置了具有滚动体滚行部(1a)的轨道部件(1)、具有和滚动体滚行部(1a)对置的负荷滚动体滚行部(2a)且相对于该轨道部件(1)能够作相对直线或曲线运动的移动部件(2)、以及介于轨道部件(1)的滚动体滚行部(1a)和移动部件(2)的滚动体滚行部(2a)之间的多个滚动体(3)。在轨道部件(1)和移动部件(2)之间的间隙(16)中充满了与轨道部件(1)和移动部件(2)接触的油层。利用油的粘性阻力，向移动部件(2)或者轨道部件(1)施加与速度成比例的制动力。
The present invention provides a motion guide device with a novel shock absorbing structure different from conventional shock absorbing structures. The present invention is provided with a track component (1) having a rolling element rolling portion (1a), having a load rolling element rolling portion (2a) opposite to the rolling element rolling portion (1a) and relative to the track component (1 ) the moving part (2) capable of relatively linear or curved motion, and the rolling part (1a) between the rolling part (1a) of the track part (1) and the rolling part (2a) of the moving part (2) Multiple rolling elements (3). The gap (16) between the track part (1) and the moving part (2) is filled with an oil layer that is in contact with the track part (1) and the moving part (2). Using the viscous resistance of the oil, a braking force proportional to the speed is applied to the moving part (2) or the track part (1).
Description
Technical field
The present invention relates to a kind of linear motion guide devices such as the linear rail of rolling elements such as ball, roller between track component and moving member, ball spline, ball screw that make.
Background technique
All the time, the worktable of picture moving linearly on mechanical framework etc., usually use the linear motion guide device of following rolling guidance type, it has rolling elements such as ball or roller in the targeting part intermediary that carries out straight-line movable object, realizes the guiding function by means of the rolling motion of rolling element.The linear motion guide device of rolling guidance type is made of the rail track of the tracks of making moving body and moving block and the rolling element between rail track and moving block that this rail track relatively moves.
Compare with slide-and-guide, the advantage of the guiding of rolling is that surface friction drag is minimum, even do not apply preload fully, also can easily move.But conversely, its shortcoming is, because slide-and-guide does not produce the damping force as surface friction drag and so on, in case vibrate, just is difficult to make it to weaken.If moving body stops after moving to the target location, then vibrate, and moving body also vibrates in moving sometimes by the inertia of moving body.
For making the vibration weakening of linear motion guide device, the claimant proposes a kind of technology (patent documentation 1, with reference to claim 1), this technology is that the dynamic vibration reducer that will be made of hammer and rubber is installed on the moving block of linear motion guide device, is weakened the vibration of moving block by this dynamic vibration reducer.
And as the existing technology that weakens vibration, the contact seal part of the rubber system that contacts with rail track is installed on the moving block of linear motion guide device, and the technology of utilizing the frictional force of contact seal part to weaken the vibration of moving block also is well-known.
Patent documentation 1: the Japanese documentation spy opens the 2004-176825 communique.
Summary of the invention
But, dynamic vibration reducer is being installed on the moving block so that in the technology of vibration weakening, have the big problem of unit scale, and hammer, the elastomer of must design consistent with the vibration of moving member dynamic vibration reducer.Thus, be difficult to adopt the general damping device of dynamic vibration reducer as linear motion guide device.
And, the contact seal part is being installed in the technology that makes vibration weakening on the moving block the big problem of surface friction drag that (that is to say that moving block begins when mobile) when having starting.If surface friction drag is big, will give the extra load of motor that moving block is moved.And, by long use,, thereby pass through certain hour and just can not make the vibration weakening of moving block because contact seal part wearing and tearing, moving block no longer contacts with the contact seal part.
Therefore, the purpose of this invention is to provide a kind of linear motion guide device that addresses the above problem and be provided with the new shock-damping structure that is different from existing shock-damping structure.
Below the present invention will be described.And, though for easy to understand the present invention has added the reference character that has parantheses,, the invention is not restricted to illustrated form.
For addressing the above problem, the invention that first scheme of the present invention is put down in writing is a kind of linear motion guide device, it is characterized in that, comprise: track component (1) with rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component (1) and described moving member (2), and the oil reservoir that is full of the gap (16) between described track component (1) and the described moving member (2) and contacts with described moving member (2) with described track component (1), wherein, described moving member (2) has the moving block (4) that has formed described load rolling element rolling portion (2a), and be installed on the end face of movement direction of described moving block (4) and and described moving block (4) divide the end vibration damper (5) that is arranged, described oil reservoir has been full of the gap between described end vibration damper (5) and the described track component (1), utilize the viscous resistance of described oil, will impose on described moving member (2) or described track component (1) with the proportional braking force of speed.
The described invention of third party's case of invention is in the described linear motion guide device of first scheme of invention, is provided with the fuel supply path (15) of supplying with oil to described gap (16) on described vibration damper (5), and oil flows out from described gap (16).
The described invention of cubic case of invention is that the face that contacts with described oil reservoir of described vibration damper (5) forms concaveconvex shape in first or the described linear motion guide device of third party's case of invention.
The described invention of the 5th scheme of invention is in the described linear motion guide device of first scheme of invention, described end vibration damper (5) has a plurality of laminal first plate (9) and a plurality of laminal second plates (10) of alternative stacked, described first plate (9) is gone up with described second plate (10) and is formed the opening (9a consistent with the shape of described track component (1), 10a), gap (β) between described second plate (10) and the described track component (1) is greater than the gap (α) between described first plate (9) and the described track component (1), make that the face that contacts with described oil reservoir of described end vibration damper (5) forms concaveconvex shape under the state with described first plate (9) and described second plate (10) lamination.
The described invention of the 6th scheme of invention is in the described linear motion guide device of the 5th scheme of invention, on described second plate (10), formed slit (10c), supply with oil with the described gap (16) that is used between described end vibration damper (5) and described track component (1), on described first plate (9) and described second plate (10), formed oil supply hole (9b, 10b), under the state with described first plate (9) and described second plate (10) lamination, this oil supply hole is used for supplying with oil to the described slit (9c) that is formed on described second plate (9).
The described invention of the 7th scheme of invention is a kind of linear motion guide device, it is characterized in that, comprise: track component (1) with rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the described load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component (1) and described moving member (2), and the oil reservoir that is full of the gap (19) between described track component (1) and the described moving member (2) and contacts with described moving member (2) with described track component (1), wherein, described moving member (2) has the moving block (4) that has formed described rolling element rolling portion (2a), and be installed in that described moving block (4) is gone up and and described moving block (4) divide the side vibration damper (6 that is arranged, 21,24,26), described moving block (4) have with the top opposed central part (4a) of described track component (1) and with the opposed foot in side (4b) of described track component (1), and unitary moulding is a saddle type, described side vibration damper (6,21,24,26) be installed in the described foot (4b) of described moving block (4), described oil reservoir has been full of described side vibration damper (6,21,24,26) and the gap (19) between the described track component (1), utilize the viscous resistance of described oil, will impose on described moving member (2) or described track component (1) with the proportional braking force of speed.
The described invention of case from all directions of invention is in the described linear motion guide device of the 7th scheme of invention, has formed a plurality of grooves (23) of the direction extension that intersects along the movement direction with described moving member (2) on the described side vibration damper (21).
The described invention of the 9th scheme of invention is in the described linear motion guide device of the 7th scheme of invention, has formed a plurality of grooves (29) that extend along the movement direction of described moving member (2) on the described side vibration damper (24).
The described invention of the tenth scheme of invention is a kind of table device, this table device comprises: linear motion guide device, and it is provided with the track component (1) with rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the described load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component (1) and described moving member (2), the oil reservoir that is full of the gap (16) between described track component (1) and the described moving member (2) and contacts with described moving member (2) with described track component (1); And be installed in worktable (31) on the described moving member (2) of described linear motion guide device; Wherein, described moving member (2) has on the end face of moving block (4) that has formed described load rolling element rolling portion (2a) and the movement direction that is installed in described moving block (4) and with described moving block (4) and divides the end vibration damper (5) that is arranged, described oil reservoir has been full of the gap (16) between described end vibration damper (5) and the described track component (1), utilize the viscous resistance of described oil, will impose on described worktable (31) with the proportional braking force of speed.
The described invention of the 11 scheme of invention is a kind of shock-dampening method of linear motion guide device, wherein this linear motion guide device being provided with has the track component (1) of rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the described load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component (1) and described moving member (2), described moving member (2) has the moving block (4) that has formed described load rolling element rolling portion (2a), and be installed on the end face of the mobile aspect of described moving block (4) and and divide the end vibration damper (5) that is arranged with described moving block (4), gap (16) between described end vibration damper (5) and described track component (1) is full of the oil reservoir that contacts with described end vibration damper (5) and described track component (1), utilize the viscous resistance of described oil, will impose on described moving member (2) or described track component (1) with the proportional braking force of speed.
The described invention of the 12 scheme of invention is a kind of table device, this table device comprises: linear motion guide device, and it has the track component (1) of rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the described load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component and described moving member (2), and the oil reservoir that is full of the gap (16) between described track component (1) and the described moving member (2) and contacts with described moving member (2) with described track component (1); And be installed in worktable (31) on the described moving member (2) of described linear motion guide device; Wherein, described moving member (2) has the moving block (4) that has formed described load rolling element rolling portion (2a), and be installed in that described moving block (4) is gone up and divide the side vibration damper (6 that is arranged with described moving block (4), 21,24,26), described moving block (4) have with the top opposed central part (4a) of described track component (1) and with the opposed foot in side (4b) of described track component (1), and integral body forms saddle type, described side vibration damper (6,21,24,26) be installed in the described foot (4b) of described moving block (4), described oil reservoir has been full of described side vibration damper (6,21,24,26) and the gap (19) between the described track component (1), utilize the viscous resistance of described oil, will impose on described moving member (2) or the described track component (1) with the proportional braking force of speed.
The described invention of the 13 scheme of invention is a kind of shock-dampening method of linear motion guide device, wherein this linear motion guide device being provided with has the track component (1) of rolling element rolling portion (1a), have with opposed load rolling element rolling portion of described rolling element rolling portion (1a) (2a) and can make the moving member (2) of relative straight line or curvilinear motion with respect to described track component (1), a plurality of rolling elements (3) between the described load rolling element rolling portion (2a) of the rolling element rolling portion (1a) of described track component (1) and described moving member (2), described moving member (2) has the moving block (4) that has formed described load rolling element rolling portion (2a), and be installed in that described moving block (4) is gone up and divide the side vibration damper (6 that is arranged with described moving block (4), 21,24,26), described moving block (4) have with the top opposed central part (4a) of described track component (1) and with the opposed foot in side (4b) of described track component (1), and unitary moulding is a saddle type, described side vibration damper (6,21,24,26) be installed in the described foot (4b) of described moving block (4), described oil reservoir has been full of described side vibration damper (6,21,24,26) and the gap (19) between the described track component (1), utilize the viscous resistance of described oil, will impose on described moving member (2) or the described track component (1) with the proportional braking force of speed.
The invention effect
According to the described invention of first scheme of invention, the viscous resistance of the oil reservoir by being full of the gap between track component and the moving member can make linear motion guide device have shock absorbing characteristics.Because the speed of braking force and moving member is proportional, the braking force in the time of can reducing starting, on the other hand, along with the speed raising of moving member, braking force also can increase.Therefore, for example, driven when mobile by motor at moving member, reduce braking force, thereby the load of motor is low, on the other hand, stop to move the back when vibration takes place at moving member, it is big that braking force becomes, and can promptly weaken vibration.And, if owing to continuously oil subsidy is given to the gap, just can semipermanent ground use damping device, therefore, can not resemble and weaken along with time lapse the contact seal part.Further, because moving block and end vibration damper branch are arranged, be easy to make the gap smaller between end vibration damper and the track component.Because the viscous resistance of oil is thin more and big more along with bed thickness, then, can obtain big braking force by reducing the gap between end vibration damper and the track component.
Do along track component to compare with the situation of swivel bearing in the linear motion guide device of straight line or curvilinear motion at moving member, be difficult to the oil that has been full of between end vibration damper and the track component is sealed.According to the described invention of third party's case of invention, owing to be provided with the fuel supply path of the gap fuel feeding between end vibration damper and track component, even oil flows out from this gap, oil also can be full of this gap.
According to the described invention of cubic case of invention, because the concaveconvex shape of end vibration damper can make oil retain, the oily retention performance of end vibration damper improves, and can reduce the oil mass that flows out from the gap.Relative therewith, if the face that contacts with oil reservoir of end vibration damper is the plane, because oil is retained, the oily retention performance of end vibration damper reduces.
The described invention of the 5th scheme according to invention can form the concaveconvex shape that contacts with oil reservoir on the vibration damper of end.And, even the end vibration damper moves with respect to track component, also oil can be remained on end vibration damper one side.
According to the described invention of the 6th scheme of invention, can supply with oil to the gap between end vibration damper and the track component.And, because at the big slit in gap that has formed on second plate between ratio and the track component, oil is easy to be full of the gap between vibration damper and the track component.Further, because slit forms every a ground, oil is easy to be full of all of gap, and, be formed on first plate with slit and compare, thereby the delivery volume that can suppress oil is suitably supplied with oil to the gap with the situation on second plate.
As the described invention of the 7th scheme of invention, oil reservoir also can be located between side vibration damper and the track component.Because moving block and side vibration damper branch are arranged, and are easy to make the gap smaller between side vibration damper and the track component.Because the viscous resistance of oil is thin more and big more along with bed thickness, then, can obtain big braking force by reducing the gap between side vibration damper and the track component.
The described invention of case from all directions according to invention, owing on the vibration damper of side, formed the groove of the direction extension that intersects along movement direction with moving member, even thereby the side vibration damper moves with respect to track component, also oil can be remained on side vibration damper one side.
The described invention of the 9th scheme according to invention, owing on the vibration damper of side, formed a plurality of grooves that extend along the movement direction of moving member, can suppress oil from the side vibration damper flow out along direction (for example, downwards) with the movement direction quadrature of moving member.
According to the described invention of the tenth scheme of invention, the viscous resistance of the oil reservoir by being full of the gap between track component and the moving member can make worktable keep shock absorbing characteristics.Because the speed of braking force and moving member is proportional, the braking force in the time of can making starting is less, and on the other hand, the speed increase along with worktable can produce high braking force.Therefore, for example, undertaken by motor driven when mobile at worktable, braking force is little, thereby the load of motor reduces, and on the other hand, when beginning to vibrate after worktable stops to move, braking force increases, thereby can promptly weaken vibration.And because continuously to the gap make-up oil, damping device can be used as semi-permanent device and uses, and therefore, can not resemble passage in time the contact seal part and miopragia.Further, because moving block and end vibration damper branch are arranged, be easy to make the gap smaller between end vibration damper and the track component.Because the viscous resistance of oil is thin more and big more along with bed thickness, then, can obtain big braking force by reducing the gap between end vibration damper and the track component.
As the described invention of the 11 scheme of invention, the present invention also relates to the shock-dampening method of linear motion guide device.
According to the described invention of the 12 scheme of invention, the viscous resistance of the oil reservoir by being full of the gap between track component and the moving member can make worktable keep shock absorbing characteristics.Further, because moving block and side vibration damper branch are arranged, be easy to make the gap smaller between side vibration damper and the track component.Because the viscous resistance of oil is thin more and big more along with bed thickness, then little by the gap that reduces between side vibration damper and the track component, can obtain big braking force.
As the described invention of the 13 scheme of invention, the present invention also relates to the shock-dampening method of linear motion guide device.
Description of drawings
Fig. 1 is the stereogram of the linear motion guide device of an embodiment of the present invention;
Fig. 2 is the exploded perspective view of above-mentioned linear motion guide device;
Fig. 3 is the side view of above-mentioned linear motion guide device;
Fig. 4 is the side view (containing some sectional view) of above-mentioned linear motion guide device;
Fig. 5 is the exploded perspective view of end vibration damper;
Fig. 6 is the schematic representation that makes the end vibration damper inverted status among Fig. 5;
Fig. 7 is the schematic representation ((A) is plan view among the figure, (B) is the sectional view along the B-B line, (C) is details drawing) that the end vibration damper of stacked state is shown;
Fig. 8 is the figure (plan view) that flows that the oil of end vibration damper is shown;
Fig. 9 is the figure (sectional view) that flows that the oil of end vibration damper is shown;
Figure 10 is the plan view that the side vibration damper that is installed on the moving block is shown;
Figure 11 is the stereogram that the side vibration damper is shown;
Figure 12 is the stereogram that other examples of side vibration damper are shown;
Figure 13 is the planimetric map that side vibration damper among Figure 12 is shown;
Figure 14 is the stereogram that another example of side vibration damper is shown;
Figure 15 is the plan view that side vibration damper among Figure 14 is shown;
Figure 16 is the stereogram that another example of side vibration damper is shown;
Figure 17 is the plan view that side vibration damper among Figure 16 is shown;
Figure 18 is the stereogram that the linear motion guide device that oily holding member has been installed is shown;
Figure 19 is the bottom side stereogram that the moving member that oily holding member has been installed is shown;
Figure 20 is the exploded perspective view of oily holding member;
Figure 21 is the side view that the table device in an embodiment of the present invention is shown;
Figure 22 illustrates the pattern of viscous resistance;
Figure 23 illustrates the pattern of fuel supply path.
Description of reference numerals
1 ... rail track (track component)
1a ... ball rolling groove (rolling element rolling groove)
2 ... moving member
2a ... sandstone ball rolling groove (load rolling element rolling groove)
3 ... ball (rolling element)
4 ... moving block
4a ... central part
4b ... foot
5 ... end vibration damper (vibration damper)
6,21,24,26 ... side vibration damper (vibration damper)
9 ... first plate
9a, 10a ... opening
9b, 10b ... oil supply hole (fuel supply path)
10 ... second plate
10c ... otch (fuel supply path)
15 ... fuel supply path
16,19 ... the gap
23,26,29 ... groove
31 ... worktable
32 ... vibration damper
Embodiment
Fig. 1 to Fig. 4 illustrates the linear motion guide device in the one embodiment of the present invention.Fig. 1 is the stereogram that linear motion guide device is shown, and Fig. 2 is the exploded perspective view that linear motion guide device is shown, and Fig. 3 illustrates its side view, and Fig. 4 illustrates its plan view (containing some sectional view).The linear motion guide device of this mode of execution is called linear rail, and has with what lineal shape extended and be assembled in moving member 2 on this rail track 1 as the rail track 1 of track component and by a plurality of balls 3 as rolling element with moving freely.
Be formed with the ball rolling groove 1a that stretches in a longitudinal direction on the left and right side of rail track 1 as rolling element rolling portion.The cross section of ball rolling groove 1a is a circular arc, has the radius of curvature bigger than the radius of ball 3.In this embodiment, be provided with each two ball rolling groove 1a that amount to 4 up and down on the left and right side of rail track 1, but self-evident, its number configuration is carried out various settings according to the loading of loading.
Moving member 2 comprises moving block 4 and the vibration damper 5,6 that is installed on this moving block 4, and wherein, this moving block 4 is formed with the ball circulating path that contains with the opposed sandstone ball rolling of ball rolling groove 1a groove 2a.
As shown in Figure 4, moving block 4 integral body form saddle type, are provided with the 4b of foot that extends with the central part 4a that is oppositely arranged above of rail track 1, from the left and right sides of central part 4a and be oppositely arranged with the left and right side of rail track 1 downwards.
A plurality of balls 3 are between the sandstone ball rolling groove 2a of the ball rolling groove 1a of rail track 1 and moving block 4.Apply preload to the ball 3 that on the sandstone ball roll-off path between this ball rolling groove 1a and the sandstone ball rolling groove 2a, rolls.Ball 3 is subjected to loading on one side on the sandstone ball roll-off path, Yi Bian make rolling motion.The end plate 7 (with reference to figure 1 and Fig. 2) of the direction transduction pathway that has formed the U font is installed on the two end part of the movement direction of moving block 4.The ball 3 of an end that is rolled to the sandstone ball roll-off path of moving block 4 enters the U font direction transduction pathway (with reference to figure 1 and Fig. 2) that is located on the end plate 7.Ball enters the zero load ball return path 8 (with reference to figure 4) that extends in parallel with the sandstone ball roll-off path after through U font direction transduction pathway.The ball 3 that has passed through zero load ball return path 8 enters the sandstone ball roll-off path once more after the direction transduction pathway of the end plate 7 of process opposition side.Direction transduction pathway and rectilinear zero load ball return path 8 by rectilinear sandstone ball roll-off path, U font have formed annular ball circulating path.
As depicted in figs. 1 and 2, end vibration damper 5 as vibration damper is installed on the both ends of the surface of the movement direction of moving block 4.End vibration damper 5 is made of laminal a plurality of first and second plates 9,10 of alternative stacked and push plate 11 that this first and second plate 9,10 has been installed.Formed the opening that conforms to the outer shape of rail track 1 on the end vibration damper 5.End vibration damper 5 does not contact with rail track 1, and the gap between rail track 1 and the moving block 4 is as far as possible little.
Fig. 5 and Fig. 6 illustrate the exploded perspective view of end vibration damper 5.Fig. 5 illustrates the exploded perspective view of first plate 9, second plate 10 and push plate 11, and Fig. 6 illustrates the exploded perspective view of the end vibration damper counter-rotating that makes among Fig. 5.First plate 9 by come with press machine punching press for example metal thin plate such as stainless steel make.First plate 9 roughly forms rectangle, and the middle body in its underpart has the opening 9a consistent with the sectional shape of rail track 1.Though will be described in detail afterwards, the shape of opening 9a is bigger slightly than the sectional shape of rail track 1.Above the opening 9a of first plate 9, formed and be used for the oil supply hole 9b of the gap fuel feeding between end vibration damper 5 and rail track 1.The both sides of the opening 9a of first plate 9 is formed with through hole 9c, and this through hole 9c is used for by first plate 9 and second plate 10 being installed in the screw 13 on the push plate 11.And, being formed with through hole 9d in the both sides of the oil supply hole 9b of first plate, this through hole 9d is used for by end vibration damper 5 being installed in the screw 14 (with reference to figure 2) on the moving block 4.Be formed with leg-of-mutton recess 9f on the side of first plate 9.
Above the opening 10a of second plate 10, also be formed with oil supply hole 10b, supply with oil with the gap between end vibration damper 5 and rail track 1.Second plate 10 also is formed with the slit 10c that extends to opening 10a from oil supply hole 10b.This slit 10c is for supplying to oil in the path in the gap between end vibration damper 5 and the rail track 1.The both sides of the opening 10a of second plate 10 also is formed with through hole 10d, to pass through screw 13 etc.Second plate 10 is for example also made by the thin plate of press machine stamped metal system.And, be formed with the leg-of-mutton recess 10f that staggers in the position of above-below direction with first plate 9 on the side of second plate 10.After with this first plate 9 and 10 assemblings of second plate, can it be differentiated from the outside.Replace with press machine punching press first plate 9 and second plate 10 if process, then can improve the dimensional accuracy of first plate 9 and second plate 10 with laser beam machining or line.
In order on end vibration damper 5, to form a plurality of concaveconvex shapes, expect that first plate 9 and second plate 10 are thinner.On the other hand, in order to be difficult to deform when tightening with screw 13, first plate 9 and second plate 10 preferably keep thickness to a certain degree.According to this opposite requirement, the thickness of first plate 9 and second plate 10 for example is set at 0.2mm.Self-evident, can set any thickness outside the consistent size with moving block 4.
The wall thickness of wall ratio first and second plates 9,10 of push plate 11 is thick.Also be formed with the opening 11a consistent on this push plate 11 with the shape of rail track 1.Above opening 11a, form the oily circulation port 11b that is communicated with oil supply hole 9b, 10b.Be formed with the 11c of female thread portion with screw 13 threaded joint in the both sides of opening 11a.First plate 9, second plate 10 and push plate 11 are fixed on the assembling fixture, under positioning states, use screw 13 its combination.
Fig. 7 illustrates the end vibration damper of layer-by-layer state.Shown in Fig. 7 (A), the shape of the opening 10a of second plate 10 is bigger than the shape of the opening 9a of first plate 9.For this reason, as Fig. 7 (B) with (C), under state with first plate 9 and second plate, 10 laminations, gap beta between second plate 10 and the rail track 1 is bigger than the gap α between first plate 9 and the rail track 1, therefore, the face that is oppositely arranged with rail track 1 of end vibration damper forms concaveconvex shape.
Under end vibration damper 5 was installed in state on the moving block 4, the gap α between first plate 9 and the rail track 1 was made as below the 0.25mm near the position of rail track 1 at first plate 9.For example, be set at about 0.05～0.25mm.Because this gap α is provided with more for a short time, viscous resistance as described later is big more, thus the desired value of gap α preferably is set to about 0.05～0.06mm or below.But, because the tolerance that rail track 1 exists in the processing if be provided with too smallly, worries that then end vibration damper 5 contacts with rail track 1.Thus, in this embodiment, add the tolerance+0.1mm of rail track 1, the tolerance+0.05mm of vibration damper 5, and because of variable quantity 0.02～0.03mm of the gap α that loading caused of additional movement guiding device, gap α is set to be preferably about 0.05～0.15mm about 0.02～0.25mm.
In this embodiment, the height difference γ (the vertical discrepancy in elevation) of first plate 9 and second plate 10 is substantially equal to the thickness t of first and second plates 9,10, for example is set at about 0.2mm.This height difference γ is big more, and then the surface of contact of oil and end vibration damper 5 is just big more.But the gap beta between second plate 10 and the rail track 1 is big, and then viscous resistance diminishes.Decide height difference γ by taking all factors into consideration.Self-evident, also needn't be defined as 0.2mm.
Fig. 8 and 9 illustrates flowing of oil in the end vibration damper 5.Formed fuel supply path 15 by oil supply hole 9b, the 10b of first plate 9 and second plate 10 and the slit 10c of second plate 10.If oil flows into this fuel supply path 15 from pipe 12 (with reference to figure 1), then oil can flow down from oil supply hole 9b, 10b, via the slit 10c inflow end vibration damper 5 of second plate 10 and the gap 16 between the rail track 1.Like this, by fuel supply path 15 is set, can make the gap 16 between end vibration damper 5 and the rail track 1 be full of oil all the time.
As shown in Figure 9, the gap beta between second plate 10 and the rail track 1 is bigger than the gap α between first plate 9 and the rail track 1.Thus, oil is easy to flow between second plate 10 and the rail track 1, and can easily be full of oil in the gap 16 between end vibration damper 5 and rail track 1.And because slit 10c forms every a ground, oil is easy to be full of the integral body in gap 16, and compares with the situation of whole formation slit 10c, thereby the delivery volume that can suppress oil is supplied with an amount of oil to gap 16.
The end vibration damper 5 discord rail tracks 1 that are installed on the moving block 4 move contiguously.In the inboard of end vibration damper 5 and the gap 16 between the rail track 1, be full of oil reservoir.If moving member 2 relatively moves with respect to rail track 1, because of the viscous resistance as braking force has taken place, so weaken the vibration of moving member 2 by the viscous resistance of oil.The viscous resistance of oil becomes ratio with the speed of moving member 2, and the viscous resistance during starting is little, and along with the speed of moving member 2 increases, produces high viscous resistance.Therefore, for example, when moving member 2 is mobile by motor driven, thereby the load of the little motor of viscous resistance descends, and on the other hand, stopping the back when vibration takes place at moving member 2, thereby the big vibration of viscous resistance can be decayed rapidly.
Minimum and surface of contact that contact with oil forms concaveconvex shape because of its thickness in gap 16 between end vibration damper 5 and the rail track 1, so oil is difficult to from the gap 16 and flows out.In addition, if use the high oil of kinetic viscosity in order to obtain the high viscosity resistance, then oil is difficult to all the more flow out from gap 16.But, owing to, still have 16 outflows of a spot of oil from the gap not fully with oil-tightening cause.
The oil that supplies to gap 16 is coated on the rail track 1.So, to the system of gap 16 fuel feeding with the forced feed oil system of lubricant oil coercively fed rail track 1 is similar.Be also used as lubricant oil such as lubricating grease if supply to the oil in gap 16, then the inside of moving member 2 does not just need other lubricant oil.For example, if use 10～500 high kinetic viscosity lubricant oil, then can access high viscous resistance.
The path that is connected with the fuel supply path of end vibration damper 5 can be set on moving block 4, and the pipe 12 (with reference to figure 1) that will be installed on oil supply hole 9b, the 10b of end vibration damper 5 at two ends of moving block 4 connects into ring-type, oil can circulate thus.If oil circulates,, can obtain cooling effect owing to the heat that accumulates in the moving block 4 can be carried out heat exchange with outside release.Even in this case, still have 16 outflows of a spot of oil from the gap.16 oil that flow out can reclaim from the gap, also can not reclaim.As under the situation of cooling liquid, enter the inside of moving block 4 at oil, be necessary to design in addition Sealing for preventing cooling liquid.
Figure 10 and Figure 11 illustrate side vibration damper 6.As shown in Figure 4, moving block 4 is a saddle type all, has and the central part 4a that is oppositely arranged above of rail track 1 and the 4b of foot that is oppositely arranged with the side of rail track 1.As shown in figure 10, on the lower end of the 4b of foot, installed along the side vibration damper 6 of the direct of travel elongation of moving block 4.
When unloading moving block 4 from rail track 1, side vibration damper 6 has the function that prevents that ball 3 from falling from moving block 4.In order to keep this function, the distance between the upper end 18 of the upper end 6a of side vibration damper 6 and sandstone ball rolling groove 2a is littler than the diameter of ball 3.
Figure 12 and Figure 13 illustrate other examples of side vibration damper.In the side of this example vibration damper 21, on the face that contacts with oil reservoir 22 of side vibration damper 21, formed side by side along a plurality of grooves 23 that extend with the direction of the movement direction quadrature of moving member 2.Side vibration damper 21 moves with the movement direction of moving member 2 along moving member 2.By on side vibration damper 21, forming the oily hold facility that improves side vibration damper 21 along a plurality of grooves 23 that extend with the direction of the movement direction quadrature of moving member 2.
Figure 14 and Figure 15 illustrate other examples of side vibration damper.In the side of this example vibration damper 24, on the face that contacts with oil reservoir 25 of side vibration damper 24, be formed with a plurality of grooves 29 that extend along the movement direction of moving member 2 side by side.Side vibration damper 24 according to this example, owing on side vibration damper 24, be formed with a plurality of grooves that extend along the movement direction of moving member 2, therefore can suppress oil along with the direction (for example downwards) of the movement direction quadrature of moving member 2 from the side vibration damper 24 flow out.If be formed with a plurality of grooves on the side vibration damper 24, then area of contact increases, and viscous resistance improves.Set out in this point, oil utilizes its deadweight to be difficult to flow out from the gap.And the bearing of trend of groove 29 both can be parallel with the movement direction of moving member 2, and was also crisscross.
Figure 16 and Figure 17 illustrate another example of side vibration damper 24.In this example, being formed with the cross section on the face that contacts with oil reservoir 27 of side vibration damper 26 is leg-of-mutton groove 28.The sectional shape of groove 28 also can not be the triangle shown in this example.
The following installation of vibration damper 2 that Figure 18 and Figure 19 are illustrated in the linear motion guide device of above-mentioned mode of execution keeps the example of the oily holding member 35 of oil as food tray.Oil flows out on a small quantity from gap 16 between end vibration damper 5 and the rail track 1 and the gap 19 between side vibration damper 24 and the rail track.For preventing the outside of oil leakage to linear motion guide device, oily holding member 35 absorbs 16,19 oil that flow out from the gap.
Figure 20 illustrates the exploded perspective view of oily holding member 35.Oil holding member 35 is provided with oily absorber 37 of absorption oil of sponge and so on and the housing 36 that covers the lower side of oily absorber 37.For absorbing oil, oily absorber 37 contacts with side vibration damper 24 with end vibration damper 5.And this oil absorber 37 also contacts with rail track 1, in order to avoid oil leakage is to outside.
On oily absorber 37, be provided with oily absorber isolating plate 38a, 38b.This is owing to the shape because of moving block 2 produces the gap between oily absorber 37 and moving block 2.Because produce the gap, therefore, even oily absorber 37 specially has been installed, oil also can spill.For this gap of shutoff is provided with oily absorber isolating plate 38a, 38b.The oily holding member 35 of combination is installed on the moving block 2 by set screw 39 grades.
Figure 21 illustrates the table device in an embodiment of the present invention.Table device is installed in worktable 31 on the moving member 2 of linear motion guide device of above-mentioned mode of execution.Moving body can be installed in worktable 31 above.On the other hand, rail track 1 is installed on mechanical framework etc., and the moving member 2 that straight line moves is assembled on this rail track 1.In this embodiment, 2 moving members 2 are corresponding to 1 assembling of a rail track.Therefore the structure of linear motion guide device is identical with above-mentioned mode of execution, with identical symbolic representation and the omission explanation to it.
Vibration damper 32 is installed below worktable 31.Vibration damper 32 surrounds rail track 1, and moves along rail track 1.The structure of the vibration damper 32 roughly structure with above-mentioned end vibration damper 5 is identical.That is to say, vibration damper 32 has the opening consistent with the outer shape of rail track 1, do not contact with rail track 1 and and rail track 1 between leave moving of gap slightly.Be full of oil reservoir between vibration damper 32 and the rail track 1.By this oily viscous resistance, can apply and the proportional braking force of speed to worktable 31, thereby can make the vibration attenuation of worktable 31.
And the present invention can make various changes in the constant scope of main idea of the present invention.For example, shock-damping structure of the present invention goes for the linear motion guide device such as ball spline, ball screw except that linear rail.And rail track 1 both can extend by straight line shape, also can be bent into curve-like.Be bent under the curvilinear situation at rail track 1, moving block is done relative curvilinear motion along rail track.And the face that contacts with oil of vibration damper needs not to be concaveconvex shape, also can form plane shape.And, though the end vibration damper constitute by laminal plate lamination,, also can constitute this end vibration damper by on a body component, forming a plurality of grooves.
Embodiment
Following mathematical expression 1 illustrates the calculating formula of the viscous resistance of oil.Figure 22 is the ideograph that is illustrated in the parameter of using in this calculating formula.
[several 1]
γ(1/s)＝V(m/s)/h(m)
τ(Pa)＝F(N)/A(m
2)
η(Pa·s)＝τ(Pa)/γ(1/s)
ε(mm
2/s)＝η(Pa·s)/10
3/ρ(g/cm
3)
Thus
F(N)＝η(Pa·s)·A(m
2)·V(m/s)/h(m)
＝ε(mm
2/s)·ρ(g/cm
3)·A(m
2)·V(m/s)·10
3/h(m)
γ: cut-off velocity
V: speed
H: highly
τ: shearing stress
F: viscous resistance
A: area of contact
η: viscosity
ε: kinetic viscosity
ρ: density
The parameter of viscous resistance F is speed V.Moving member 2 moves soon more, and viscous resistance F is just big more.Height h is the oil reservoir height, just the size in the gap 16 between end vibration damper 5 and the rail track 1.Gap 16 is narrow and small more, and viscous resistance F is big more.Area of contact A is big more, and viscous resistance F is big more.Be made as concavo-convexly by the area of contact with end vibration damper 5 and oil reservoir, area of contact increases, and viscous resistance F increases.The kinetic viscosity of oil is big more, and viscous resistance F is big more.
The result of calculation of using the mathematical expression 1 of above-mentioned viscous resistance to calculate an example of viscous resistance is following (1)～(3).
(1) as the kinetic viscosity (mm of liquid
2/ s) be 200.0 (40 ℃), density (g/cm
3) be 0.88, when liquid velocity is 0.01m/s:
Clearance seal spare end+side viscous resistance: 0.016N
(2) as the kinetic viscosity (mm of liquid
2/ s) be 200.0 (40 ℃), density (g/cm
3) be 0.88, when liquid velocity is 1m/s.
Clearance seal spare end+side viscous resistance: 1.6N
(3) as the kinetic viscosity (mm of liquid
2/ s) be 1000 (40 ℃).Density (g/cm
3) be 0.88, when the speed of liquid is 0.01m/s:
Clearance seal spare end+side viscous resistance: 0.08N
Below, calculate and push oil with great pressure, oil can be supplied to the gap.In calculating, use Ha Gen-pool Xiao Ye (Ha one ゲ Application Port ア ズ イ ユ) formula.As shown in figure 23, in calculating, the shape of fuel supply path is made as simple mode (radius is the tubular of 0.1mm).
Velocity distribution (m/s): v
Pressure difference (Pa): Δ P
Pipe radius (m): r
0
Try to achieve the position (m) of speed: r
Oil viscosity (Pas=10P=10 ρ η): μ
Displacement distance (m): L
Density (g/cm
3): ρ
Pumping pressure (Pa): P
The kinetic viscosity (St) of oil: η
ΔP＝(P-10
5)，r＝0
Can obtain minimum pressure from mathematical expression 3 and mathematical expression 4.Speed v is the rate of outflow of oil, is 0.0035351m/s.According to more than, can draw following mathematical expression 4.
P＝4×0.003531×10×0.88×220×0.01×18.11/1000/(0.1/1000)
2-0
2)+10
5
＝595776
＝5.96×10
5(Pa)
From mathematical expression 4, be 6 barometric pressure if can draw minimum pressure, oil can flow.
The basis of this specification is that the spy of application on November 15th, 2004 is willing to that the spy of 2004-331221 and application on October 28th, 2005 is willing to 2005-315299.Its full content comprises at this in the lump.
Claims (12)
1. a linear motion guide device is characterized in that, comprising:
Track component with rolling element rolling portion;
Have with opposed load rolling element rolling portion of described rolling element rolling portion and can make the moving member of relative straight line or curvilinear motion with respect to described track component;
A plurality of rolling elements between the described load rolling element rolling portion of the rolling element rolling portion of described track component and described moving member; And
The oil reservoir that is full of the gap between described track component and the described moving member and contacts with described moving member with described track component;
Wherein, described moving member have the moving block that forms described rolling element rolling portion and be installed on the end face of movement direction of described moving block and and the end vibration damper that is arranged of described moving block branch,
Described oil reservoir is full of the gap between described end vibration damper and the described track component, utilizes the viscous resistance of described oil, will impose on described moving member or described track component with the proportional braking force of speed.
2. linear motion guide device as claimed in claim 1 is characterized in that, is provided with fuel supply path from oil to described gap that supply with on described vibration damper.
3. linear motion guide device as claimed in claim 1 or 2 is characterized in that, the face that contacts with described oil reservoir of described vibration damper forms concaveconvex shape.
4. linear motion guide device as claimed in claim 1 is characterized in that,
Described end vibration damper has a plurality of laminal first plate and a plurality of laminal second plate of alternative stacked,
Form the opening consistent on described first plate and described second plate with the shape of described track component,
Gap between described second plate and the described track component is greater than the gap between described first plate and the described track component, make that under state the face that contacts with described oil reservoir of described end vibration damper forms concaveconvex shape with described first plate and the described second plate lamination.
5. linear motion guide device as claimed in claim 4 is characterized in that,
On described second plate, formed slit, supplied with oil with the described gap that is used between described end vibration damper and described track component,
Formed oil supply hole on described first plate and described second plate, under the state with described first plate and the described second plate lamination, this oil supply hole is used for supplying with oil to the described slit that is formed on described second plate.
6. a linear motion guide device is characterized in that, comprising:
Track component with rolling element rolling portion;
Have with opposed load rolling element rolling portion of described rolling element rolling portion and can make the moving member of relative straight line or curvilinear motion with respect to described track component;
A plurality of rolling elements between the described load rolling element rolling portion of the described rolling element rolling portion of described track component and described moving member; And
The oil reservoir that is full of the gap between described track component and the described moving member and contacts with described moving member with described track component;
Wherein, described moving member have the moving block that has formed described load rolling element rolling portion and be installed on the described moving block and and the side vibration damper that is arranged of described moving block branch,
Described moving block have with the top opposed central part of described track component and and the opposed foot in side of described track component, and integral body forms saddle type, described end vibration damper is installed in the described foot of described moving block,
Described oil reservoir is full of the gap between described end vibration damper and the described track component, utilizes the viscous resistance of described oil, will impose on described moving member or the described track component with the proportional braking force of speed.
7. linear motion guide device as claimed in claim 6 is characterized in that, has formed a plurality of grooves that the direction of intersecting along the movement direction with described moving member is extended on the vibration damper of described side.
8. linear motion guide device as claimed in claim 6 is characterized in that, has formed a plurality of grooves that extend along the movement direction of described moving member on the vibration damper of described side.
9. a table device is characterized in that, comprising:
Linear motion guide device, it comprises track component with rolling element rolling portion, have and opposed load rolling element rolling portion of described rolling element rolling portion and with respect to described track component can do relative straight line or curvilinear motion moving member, between a plurality of rolling elements between the described load rolling element rolling portion of the described rolling element rolling portion of described track component and described moving member and be full of described track component and described moving member between the gap and the oil reservoir that contacts with described track component and described moving member; And
Be installed in the worktable on the described moving member of described linear motion guide device;
Described table device is characterised in that,
The end vibration damper that described moving member has the moving block that has formed described load rolling element rolling portion and is installed on the end face of movement direction of described moving block and is arranged with described moving block branch,
Described oil reservoir has been full of the gap between described end vibration damper and the described track component, utilizes the viscous resistance of described oil, will impose on described worktable with the proportional braking force of speed.
10. the shock-dampening method of a linear motion guide device, wherein this linear motion guide device comprises: have rolling element rolling portion track component, have and opposed load rolling element rolling portion of described rolling element rolling portion and can make the moving member and a plurality of rolling elements between the described load rolling element rolling portion of the described rolling element rolling portion of described track component and described moving member of relative straight line or curvilinear motion with respect to described track component
Wherein, the end vibration damper that described moving member has the moving block that has formed described load rolling element rolling portion and is installed on the end face of movement direction of described moving block and is arranged with described moving block branch,
In the gap between described end vibration damper and described track component, be full of the oil reservoir that contacts with described end vibration damper and described track component,
Utilize the viscous resistance of described oil, will impose on described moving member or described track component with the proportional braking force of speed.
11. a table device is characterized in that, comprising:
Linear motion guide device, it comprises track component with rolling element rolling portion, have and opposed load rolling element rolling portion of described rolling element rolling portion and with respect to described track component can do relative straight line or curvilinear motion moving member, between a plurality of rolling elements between the described load rolling element rolling portion of the described rolling element rolling portion of described track component and described moving member and be full of described track component and described moving member between the gap and the oil reservoir that contacts with described track component and described moving member; And
Be installed in the worktable on the described moving member of described linear motion guide device;
Wherein, the side vibration damper that described moving member has the moving block that has formed described load rolling element rolling portion and is installed on the described moving block and is arranged with described moving block branch,
Described moving block have with the top opposed central part of described track component and with the opposed foot in the side of described track component, and integral body forms saddle type, described side vibration damper is installed in the described foot of described moving block,
Described oil reservoir has been full of the gap between described side vibration damper and the described track component, utilizes the viscous resistance of described oil, will impose on described worktable with the proportional braking force of speed.
12. the shock-dampening method of a linear motion guide device, this linear motion guide device comprises: have rolling element rolling portion track component, have and opposed load rolling element rolling portion of described rolling element rolling portion and can make the moving member and a plurality of rolling elements between the described load rolling element rolling portion of the described rolling element rolling portion of described track component and described moving member of relative straight line or curvilinear motion with respect to described track component
The shock-dampening method of described linear motion guide device is characterised in that,
The side vibration damper that described moving member has the moving block that has formed described rolling element rolling portion and is installed on the described moving block and is arranged with described moving block branch,
Described moving block have with the top opposed central part of described track component and with the opposed foot in the side of described track component, and integral body forms saddle type, described side vibration damper is installed in the described foot of described moving block,
In the gap between described end vibration damper and described track component, be full of the oil reservoir that contacts with described end vibration damper and described track component,
Utilize the viscous resistance of described oil, will impose on described moving member or described track component with the proportional braking force of speed.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP331221/2004 | 2004-11-15 | ||
| JP2004331221 | 2004-11-15 | ||
| JP315299/2005 | 2005-10-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101084382A CN101084382A (en) | 2007-12-05 |
| CN100545472C true CN100545472C (en) | 2009-09-30 |
Family
ID=38913170
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005800387263A Expired - Fee Related CN100545472C (en) | 2004-11-15 | 2005-10-31 | Motion guide device, workbench device and shock absorption method for motion guide device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100545472C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5600468B2 (en) * | 2009-05-29 | 2014-10-01 | Ｔｈｋ株式会社 | Motion guide device and screw device |
| DE102010019681B4 (en) * | 2010-05-07 | 2019-10-02 | Robert Bosch Gmbh | Linear motion device with omega drive |
| CN105775710A (en) * | 2016-04-12 | 2016-07-20 | 赵士立 | Pneumatic sliding block of automatic material receiving machine |
| CN108843690B (en) * | 2018-06-28 | 2020-09-29 | 厦门理工学院 | Vibration damping systems and damping bearings |
-
2005
- 2005-10-31 CN CNB2005800387263A patent/CN100545472C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101084382A (en) | 2007-12-05 |
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