CN101025196A - Separator, linear guide using the separator and linear motion apparatus - Google Patents
Separator, linear guide using the separator and linear motion apparatus Download PDFInfo
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- CN101025196A CN101025196A CN 200710091818 CN200710091818A CN101025196A CN 101025196 A CN101025196 A CN 101025196A CN 200710091818 CN200710091818 CN 200710091818 CN 200710091818 A CN200710091818 A CN 200710091818A CN 101025196 A CN101025196 A CN 101025196A
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Abstract
A separator for use in a linear guide having a guide rail, a slider disposed on the guide rail so as to move relatively each other, and a plurality of roller-shaped rolling elements incorporated in the slider, the separator has a separator main body having, on both sides in a front and rear direction thereof, recessed surface sections which contact circumferential sections of the rolling elements; and at least a pair of arm sections provided parallel to each other on both sides of the separator main body while being oriented in the same direction, wherein a length of the arm section is equal or shorter than a distance between centers of two adjacent rolling elements with the separator main body sandwiched therebetween, with respect to a lateral direction of the separator main-body.
Description
The application be the denomination of invention submitted to Patent Office of the People's Republic of China on February 10th, 2004 for " separator and use the linear guide part and the linear motion device of this separator ", application number be dividing an application of 200410008549.1 application for a patent for invention.
Technical field
The present invention relates to a kind of linear guide part, more particularly, the present invention relates to a kind of separator (resolution element), dispose a kind of linear guide part of this separator and use a kind of device of this linear guide part.
The invention still further relates to a kind of direct acting type device of in industrial machinery, using, for example, a kind of linear guide bearing, ball screw, ball spline and linear ball bushing.
Background technique
Use roller shape rolling element to comprise as a kind of linear guide part of rolling element: a guide rail, this guide rail are used to guide an object of linear motion; And be arranged in a slider on the described guide rail in movable mode.When slider when longitudinal direction moves on guide rail, a plurality of roller shape rolling elements and guide rail vertically in the slider roller combine between a raceway that forms on the guide rail and another raceway of forming on the slider.
Compare with the linear guide part that uses spherical rolling element, this linear guide part has bigger hardness and bearing capacity.When adjacent rolling element was in contact with one another, corresponding rolling element rotated in opposite direction at the contact area place.Therefore, the frictional force that produces at contact area produces restriction to the steady rolling of rolling element.In above-mentioned linear guide part, it is so-called crooked can producing axially fluctuation in rolling element, thereby can weaken the operability of linear guide member.
For addressing the above problem, JP-A-2001-132745 that provides hereinafter and JP-B-40-24405 have disclosed a kind of linear guide part, this linear guide part has the separator that is interposed between the roller shape rolling element, is in contact with one another with crooked thereby stop between the rolling element.
But, the disclosed linear guide part of JP-A-2001-132745 has utilized separator, separator main body and flange portion that is interposed between the roller shape rolling element, wherein, has the contacted recessed surfaces of circumferential surface with roller shape rolling element on the fore-and-aft direction both sides of this separator main body; This flange portion extends out in opposite direction from the either side of separator main body, and contacts with an end face of rolling element.Therefore, the rotational resistance of rolling element increases on an end of separator main body, thereby has reduced the rotary balance of rolling element.Therefore, it is just not enough to suppress crooked effect.
In the disclosed linear guide part of JP-B-40-24405, adopt a kind of structure, in this structure resolution element has been used as separator, wherein, on the both sides of each resolution element, be furnished with the dish type web that extends towards the center of rolling element.The web of resolution element is in contact with one another in the near zone at rolling element center and supports mutually.Therefore, between arbitrary adjacent rolling element and between arbitrary adjacent resolution element, just produced a gap.Therefore, the centre distance of adjacent two rolling elements (being gripped with a resolution element between the two) is just greater than required distance.Thereby, may reduce to be in the number of the rolling element in the loading zone like this, thereby just cause the reduction of bearing capacity.In addition, under the situation of using the disclosed linear guide part of JP-B-40-24405, the horizontal width of described resolution element is greater than the axial length of rolling element.Therefore, between the end face of rolling element and web, just produced a gap.Like this, it is also little to suppress the effect of described crooked generation.
Be furnished with therein in the linear guide part of a plurality of rolling elements, rolling element shuttling movement and each rolling element incessantly rolls along single direction.When adjacent rolling element is in contact with one another, each rolling element backward rotation in contact area.Therefore, the rolling element that the mechanical resistance of generation and compacting rolling element only is in contact with one another in contact area carries out smooth rolling.So just weakened the quiet run of linear guide part.
Compare with the situation that spherical ball is used as rolling element, when cylindricality or cylinder roller are used as rolling element, can improve the hardness and the bearing capacity (admissible bearing load) of rolling element.But, the axial fluctuation that produces is so-called crooked (longitudinal axis of cylindricality or cylindrical shape roller can not keep vertical with the moving direction of roller and produce crooked a kind of phenomenon) in the roller of operation, the described crooked operability that weakens rolling element further can be damaged the operability of linear guide part.
Reason for this reason, the linear guide part is configured to stop rolling element directly contact mutually by insert and put separator (resolution element) between rolling element, so that rolling element smooth rolling (operation), thereby improve the operability of rolling element and reduce the noise that rolling element is produced in running.
For example, among the JP-B-40-24405 that is provided hereinafter, JP-UM-A-52-110246 and the JP-B-56-2206 separator that is sandwiched between between the roller has been described.
JP-B-40-24405 has disclosed the resolution element (separator) that resolution element is used as bearing, and described bearing has adopted roller.Described resolution element has a depression contacting part and arm (web), and described depression contacting part matches with a barrel surface of roller.Described arm (web) is arranged on the respective side of resolution element, and arm is arranged on each side of resolution element and extends to the center of roller, this resolution element in direction of linear motion with the center-aligned of arm.This resolution element is in contact with one another its arm and extended arm from adjacent resolution element.
But the structure of the resolution element that JP-B-40-24405 is disclosed makes to be arranged in by an arm in the next resolution element and gives this next one resolution element with force transmission, and described active force is delivered to resolution element in roller rolled with when mobile.In actual applications, resolution element can produce following problems.
When the motion of rolling element when a linear segment is converted to a changed course part, the region generating that is in contact with one another at described arm changes, and then has increased the distance between the roller.Originally, for increasing the bearing capacity of linear guide part, roller and resolution element are arranged relatively closely in described changed course part, to arrange the resolution element of maximum quantity in a supporting region.Reason for this reason, by the effect of the active force that increases, the active force bigger than required active force just acts on all the other arms that are in contact with one another, thereby stoped the easy motion of roller and resolution element and destroyed operability.
Describe as JP-B-40-24405, be in contact with one another under the situation of transmitting effect power by making arm at resolution element, produce a gap between a roller and a resolution element, wherein this resolution element is positioned in traffic direction before or after this roller; So just can not be enough to stop crooked generation.In addition, the number that is arranged in the roller in the supporting region also is subjected to the restriction in described gap.So just can not improve bearing capacity fully.
In linear guide member, slider is with respect to guide rail movement, and a plurality of rolling elements then roll along a continuous circulating path.When slider during with respect to guide rail movement, each rolling element moves and rolls in a direction simultaneously, and therefore, adjacent rolling element just is in contact with one another.So just produced following problems: promptly the easy motion of rolling element is hindered, the wearing and tearing of rolling element increase and increased noise rapidly.
Therefore, known a kind of linear guide part steadily rolls to suppress the premature wear of rolling element rolling element at present, between adjacent rolling element, be furnished with separator to brake linear guide member and to suppress the noise diffusion (for example referring to JP-A-11-247855, JP-A-2000-291668, JP-A-2001-317552, JP-A-2002-089651, JP-A-2002-039175, JP-A-2002-156018).
A kind of known conventional separators has arm or like, is used for supporting in the precalculated position adjacent rolling element.For example, the technology disclosed according to JP-A-11-247855, the rolling element chain by make neighboring separator be connected with rolling element the structure form, wherein this rolling element is interposed between this neighboring separator.Rolling element is arranged in parallel by being interconnected in the continuous circulating path with separator.Therefore, weakened the axial fluctuation (crooked) of rolling element and the phase mutual interference between the rolling element, thus rolling element shuttling movement stably.
According to JP-A-2000-291668, JP-A-2001-317552, JP-A-2002-089651, the technology that JP-A-2002-039175 and JP-A-2002-156018 are disclosed, the lubricant reservoir that is formed by groove or through hole partly is formed in the separator, to be used for kind of lubricant storage.Because lubricant reservoir partly is formed in the separator, rolling element can roll smoothly, thereby, brake linear guide member when producing stoping rolling element to wear and tear too early and abate the noise.
But, the technology disclosed according to JP-A-11-247855, separator is not provided with groove, through hole or like, according to JP-A-2000-291668, JP-A-2001-317552, JP-A-2002-089651, JP-A-2002-039175, the technology that JP-A-2002-156018 is disclosed, these similar parts are used for kind of lubricant storage.Therefore, the technology of these disclosures is improved the following aspects, and these several aspects are: the smooth rolling motion of rolling element, and suppress rolling element and wear and tear too early, abate the noise and brake linear guide member when producing.
Simultaneously, according to JP-A-2000-291668, JP-A-2001-317552, JP-A-2002-089651, the technology that JP-A-2002-039175 and JP-A-2002-156018 are disclosed, separator is not provided with arm or like, the technology disclosed according to JP-A-11-247855, and these similar parts are used for regulating energetically the position of rolling element.Therefore, in the axial fluctuation (crooked) and the phase mutual interference between the rolling element that suppress effectively in the rolling element, the stable circulation motion problems of rolling element is still unresolved.
The present inventor has developed a kind of separator, and this separator can address the above problem fully.
When separator being folded between the adjacent rolling element, the artificially is very consuming time with the assembly manipulation that rolling element injects in the continuous circulating path.Therefore, along with the raising of productivity, the automation of assembly manipulation needs.
Therefore, a kind of possible method is by using automatic aligning machine (as parts feeder) to become delegation to arrange separator, and as robot assembly manipulation is finished by using automatically.
Although separator can fully solve foregoing problems, still need to be equipped with a plurality of separators and lubricant reservoir part, these separators are only formed the rolling element chain and are put, each rolling element all has the arm that rolling element is aimed at, and the lubricant reservoir part is made of recess or through hole.Carried out an experiment of aiming at separator automatically.In some cases, arm is fitted in through hole or the like as lubricant reservoir, will cause like this twining mutually between the separator and finally separator can not being aimed at.
As mentioned above, before realizing that separator has the effect of the position of regulating rolling element and kind of lubricant storage, the problem that still exists some to solve also needs to consider the automation of producing.
As shown in figure 41, one linear guide bearing means is many known as a kind of traditional direct acting type device, this linear guide bearing means has axially extended guide rail 501 and slider 502, and this slider 502 is configured to straddle on guide rail 51 and can relatively moves in the axial direction.
Therefore two axially extended raceway face 503 have formed four raceway face 503 altogether along on the either side surface that laterally is formed on guide rail 51 of guide rail 51.The raceway face 505 relative with raceway face 503 is formed on each inner surface of sleeve part 504 of slider body 502A of slider 502.
A plurality of cylindrical roller 506 as rolling element are rotated circularly and are loaded between the raceway face.Slider 502 can axially relatively move on guide rail 501 by the rolling motion of cylindrical roller 506.
When slider 502 moves, be folded in that cylindrical roller 506 between guide rail 501 and the slider 502 is rotated and move towards the axial end of slider 502.But in order to move axially slider 502 continuously, cylindrical roller 506 must constantly be rotated.
Through hole 507 is formed on the sleeve part 504 of slider body 502A, thereby penetrates entire sleeve part 504.Circulation pipe 8 is fitted in each through hole 507, and wherein the inboard of Circulation pipe 8 formation one is used for passage (rolling element passage) 508a of cylindrical roller 506.As a pair of end cap 509 of rolling element circulating unit, be fixed on each axial end of slider body 502A by using screw or similar component.Passage 510 (shown in Figure 42 B)---this changed course passage 510 makes raceway face 503 in one changed course, 505 communicate with rolling element passage 508a and are formed the semi-ring shape---and be formed on each end cap 509, thereby formed a continuous circulation canal for cylindrical roller 506.
Rotate around roller axle in one direction along a plurality of cylindrical roller 506 that continuous circulation canal rotates.When adjacent cylindrical roller 506 was in contact with one another, the roll speed direction that is positioned at contact area was opposite mutually.The active force that is in contact with one another and produces hinders the smooth rolling motion of cylindrical roller 506.
As shown in figure 41, in this case, separator (resolution element) 520 is folded between the adjacent cylindrical roller 506, thereby suppresses cylindrical roller 506 directly contact mutually.Therefore, the operation of slider 502 will steadily also reduce the noise that produces in the slider running.Shown in Figure 42 to 44, wherein separator 520 comprises separator main body 521 and arm 522, separator main body 521 is interposed between the adjacent cylindrical roller 506, arm 522 is configured to make the end axial surface of cylindrical roller 506 to be interposed between the arm 522, and arm 522 and separator main body 521 whole formation.Corresponding to recess 521a is formed in the zone of separator main body 521 with the outer circumferential shape of cylindrical roller 506, and this zone is relative with the external peripheral surface of cylindrical roller 506.In Figure 41, reference character 523 expression separator guide members, this separator guide member are interposed between the interior edge face of the exterior edge face of guide rail 501 and slider 502.
When cylindrical roller 506 is rotated in a certain space, this space is by raceway face 503 and 405, changed course passage 510 and rolling element passage 508a limit, the arm 522 of separator 520 is directed at cylindrical roller 506 sense of rotation upper edge guide slots 524, wherein guide slot is formed on separator guide member 523, on rolling element passage 508a and the changed course passage 510.
In addition, in order to absorb the fluctuation (referring to JP-A-2002-21849) that produces owing to the phase change of the rolling element in the circulation canal on channel-length direction, claimant of the present invention has proposed use man made rubber, as Hytrel
@Or Pelprene
@(making) by Toyobo company.Further, grease and lubricant oil or analog will make separator expand.According to the contact position between rolling element and the separator, the pitch between the rolling element will change widely, influences operability unfriendly thereby produced, low noise characteristic and persistent problem.Therefore, contact position between rolling element and the separator is defined as to be equal to or less than 50% of rolling element diameter, preferably in 30% to 50% scope (when parameter " contact position " changes over parameter " wrapping angle ", " wrapping angle " in this " contact position " scope is equal to or less than 30 °, and the wrapping angle the during optimum position is 17.5 ° to 30 °) (referring to JP-A-2003-49834).
But, according to the bottom thickness 2 δ values of the groove of radius of curvature " f " of separator recess (come by (the groove radius R of recess)/(the radius Dw of rolling element) value fixed) or separator recess, rolling element among the JP-A-2002-21849 and the contact position between the separator can not always keep optimum value.For example, when radius of curvature " f " value of separator recess is 0.54, the radius Dw value of rolling element is 8mm, when the thickness 2 δ values of recess are 1.2mm (this numerical value has guaranteed to satisfy the quantity of the required rolling element of bearing capacity), contact position between rolling element and the separator surpasses 50% (corresponding to 30 ° wrapping angle) of rolling element diameter, and 52% (corresponding to 31 ° wrapping angle) is that (difference in size between the expanded thickness on expansion length that separator directly makes progress and the separator thickness direction is zero (referring to Figure 45) to an optimal values; The expansion that makes progress of footpath causes reducing the pitch between the rolling element, and the expansion on the thickness direction causes increasing the pitch between the rolling element).
Summary of the invention
The present invention has considered foregoing problems, and purpose is to provide a kind of separator that is used for the linear guide part, and this separator can stop and comes in contact between the rolling element and suppress to take place crooked under the situation that does not reduce bearing capacity.
The present invention has considered the problem that exists in the related art, purpose is to provide a kind of separator that is used for the linear guide part, this separator can suppress bearing capacity effectively and reduce and suppress to take place crooked, and adopt a kind of simple structure to improve operability, a kind of device that comprises the linear guide part of this separator and comprise this linear guide part also is provided.
The present invention has considered the problem of above-mentioned proposition, purpose is to provide a kind of separator and a kind of linear guide part that is used for the linear guide part, this separator weakened the axial fluctuation (crooked) of rolling element inside and the phase mutual interference between the rolling element, by rotate the rolling element and the rolling element that rolls more reposefully with a kind of more stable manner, thereby suppress the premature wear of rolling element, the generation of inhibition noise, and can improve the productivity of linear guide part.
The present invention has considered to address these problems, purpose is to provide a kind of direct acting type device, when this device had suppressed to be created in owing to (expansion is caused by lubricant oils and grease or the analog) influence of expanding fluctuation in the pitch between the rolling element, this device can easily be implemented in the raising on operability, low noise characteristic and the low-cost endurance aspect.
In order to reach these purposes, a first aspect of the present invention provides a kind of separator that is used for the linear guide part, this linear guide part has a guide rail, one is arranged in the slider relatively moving mutually on the guide rail, with a plurality of roller shape rolling elements that combine with slider, this separator has a separator main body and at least one pair of arm, and the both sides of the fore-and-aft direction of this separator main body have and the contacted recessed surfaces part of the circumferential surface of rolling element; When this at least one pair of arm is arranged on the same direction, they are parallel to each other in the both sides of separator main body part, wherein for the side surface direction of separator main body, the length of arm is equal to or less than the centre distance between the two adjacent rolling elements, and wherein separator main body is interposed between this two adjacent rolling element.
Owing to adopt this structure, can stop between rolling element and the separator main body and produce the gap, and the final rolling element quantity that is arranged on the bearing area that reduces, in JP-B-40-24405, because the length L between the separator arm is less than the centre distance between the two adjacent rolling elements, so the disclosed linear guide part of JP-B-40-24405 has also reached this effect.Therefore, under the situation that does not reduce bearing capacity, can suppress contact between the rolling element and crooked.In addition, this has also prevented the rotational resistance deflection rolling element of separator, and the linear guide part that discloses among the JP-A-2001-132745 also has this specific character.Therefore, can fully reach the effect that suppresses crooked.
A second aspect of the present invention provides a kind of separator that is used for the linear guide part according to first aspect, and wherein the height of arm approximately is 20% to 60% of a roller shape rolling element diameter.By adopting this structure, strengthened separator main body with arm, and guaranteed the end surface of rolling element and contacted to have sufficient area of contact between the raceway of this end surface.
A third aspect of the present invention provides a kind of separator that is used for the linear guide part according to first aspect or second aspect, wherein the side length of separator main body is shorter than the axial length of roller shape rolling element slightly, and a surface contact in the left and right side surface of rolling element is formed on a certain surface on the slider inner surface, so that the raceway of surface in the left and right side surface of rolling element and slider is adjacent, wherein this a certain surface and raceway form simultaneously.Owing to adopted this structure, the position of rolling element becomes more stable, thereby to suppressing the crooked effective influence that produced of rolling element.
A fourth aspect of the present invention provides a kind of separator that is used for the linear guide part, wherein this linear guide part has a guide rail, and is arranged on slider and a plurality of roller shape rolling element that combines with slider relatively moving mutually on the guide rail, this separator has: a separator main body and a clearance groove, wherein the both sides of separator main body fore-and-aft direction have and the contacted recessed surfaces part of the circumferential section of rolling element, and clearance groove is formed on the center of the recessed surfaces part on the rolling element circumferencial direction.Because adopt this structure, the contact area between separator and the rolling element is limited to the left and right sides of separator.Therefore, suppress the crooked of rolling element, thereby improved the operability of linear guide part.
A fifth aspect of the present invention according to first or fourth aspect a kind of separator that is used for the linear guide part is provided, wherein, a through hole is formed on the center of recessed surfaces part, to run through the recessed surfaces part on the separator main body fore-and-aft direction.Because adopt this structure, oiling agent can be stored in the through hole, and the oiling agent that is stored in the through hole can be fed in the rolling element with being stabilized.
According to first aspect, the separator of sixth aspect present invention is a kind of separator that is used for the linear guide part, comprises a bridging portion further, and this bridging portion is used for separator main body is connected with arm.
By adopting this structure, separator can stop and is in contact with one another.Thereby separator can be operated reposefully, and rolling element is operated reposefully.Because suppressed the crooked of rolling element, then can operate more stably.Colliding the tap-tap that is sent when entering the bearing area between the rolling element mutually also has been suppressed.Finally, suppressed the noise and the vibration that in operating process, produce.
Shorten distance between the roller if be arranged on roller quantity in the load area in order to improve bearing capacity by increase, the roller contact segment of separator main body goes up attenuation at movement direction (being direction of linear motion) so.As a result, separator main body is with weakened.But the joint according to the present invention between the upper and lower of separator main body is strengthened by the bridging portion between arm and the separator, thereby has strengthened separator main body.
Therefore, can shorten in the distance between the roller under the prerequisite that guarantees required intensity.Therefore, even separator main body is folded between the roller, the minimizing that is arranged on the roller quantity of bearing area can be reduced to minimum, and the decline of load capacity can be reduced to minimum.
The roller end surface is guided by arm, thereby, the chance that roller breaks away from from separator main body and crookedly will be reduced to minimum.
In addition, use at linear guide member under the situation of this separator, if arm is guided, the crooked of roller can more effectively be suppressed, thereby roller and separator are operated more stably.
A seventh aspect of the present invention provides a kind of separator that is used for the linear guide part according to the 6th aspect, wherein, for the height of recessed surfaces, wherein this highly is from a dotted line that connects the center of rotation of adjacent rolling element, to the distance the end surface of the recessed surfaces part of separator main body, wherein this end face is arranged essentially parallel to the direct action face of rolling element, is changing steering portion; In this changed course part, the moving direction of rolling element is changed around the predefined centre of motion; The height H o of recessed surfaces is greater than the height H i of recessed surfaces, wherein height H o is meant the distance from the dotted line that connects adjacent rolling element center of rotation to terminal (this end is for the centre of motion), and height H i is meant from one and connects the distance of the dotted line of adjacent rolling element center of rotation to most proximal end (this most proximal end is for the centre of motion).
A eighth aspect of the present invention provides a kind of separator that is used for the linear guide part according to the 6th aspect, wherein, for the width of a certain end face of separator main body, wherein this end face is arranged essentially parallel to the direct action face of the rolling element that is positioned at the changed course part, in this changed course part, the moving direction of rolling element is changed around the predefined centre of motion.The width of separator main body end " a "; This end is with respect to the centre of motion, greater than the width " b " of separator main body most proximal end; Most proximal end is with respect to the centre of motion.
If separator with the 7th and the described mode of eight aspect be configured, the ability that separator main body holds roller will improve.Therefore, crooked will the inhibition effectively, and can prevent effectively that roller breaks away from.Especially, owing to improved the function of holding roller in the changed course part, thereby when this separator is used for the linear guide part,, can prevent that also roller breaks away from from guide rail even slider is thrown off.Therefore, improved the simplification of safeguarding and assembling.
A ninth aspect of the present invention provides a kind of separator that is used for the linear guide part according to the 6th either side to eight aspect, wherein, when arm is configured to respectively when equal length is extended towards the center of rotation that is positioned at the adjacent rolling element on the movement direction in the center of separator main body both sides, when the arm length of a side is represented with L, the diameter of rolling element is represented with Dwe, the centre distance of adjacent rolling element is represented with kDwe, represent with R to the radius the motion track of the center of rotation of the rolling element of changed course part from the centre of motion, radius from the centre of motion to the envelope surface is represented with Ri, wherein the position at envelope surface place is nearer and limited by arm apart from the centre of motion than dotted line, this dotted line connects the center (arm is represented with A at the height perpendicular to the raceway face direction of rolling element) of adjacent rolling element, arm has formed a profile line, thereby the length L i of arm one side (i.e. inner arm length), wherein the position at this arm place is nearer apart from the centre of motion than dotted line, this dotted line connects the center of adjacent rolling element, arm opposite side length L o (being outer arm length), wherein this arm is positioned at centrostaltic opposition side with respect to dotted line, this dotted line connects the center of adjacent rolling element, the equation below satisfying:
θ＝sin
-1{kDwe/(2R)}，0.3/2×Dwe≤A≤(R-Ri)，Li＜(kDwe/2-Asinθ)，Lo＜kDwe/2。
A tenth aspect of the present invention provides a kind of separator that is used for the linear guide part according to the 6th either side to the eight aspect, wherein, when arm be formed on each side of separator with respect to moving direction from separator main body when different length is extended at the center of adjacent rolling element, the maximum value Ls of the arm total length that extends in each side of separator with respect to moving direction, less than the center of rotation of adjacent rolling element apart from kDwe.
If the sort of mode that separator is described with the 9th and the tenth aspect is configured, the arm length of adjacent separator is configured to, and they are not contacted in the whole circulation path of roller mutually.Thereby the quiet run of roller and separator can be finished smoothly.
A eleventh aspect of the present invention provides a kind of separator that is used for the linear guide part according to the either side of the 6th to the tenth aspect, wherein, the surface of contact of separator main body both sides, contact adjacent rolling element with respect to moving direction in a certain position, in this position, the size minimum between the groove contact surface of recessed surfaces part.
By such structure, expand even produce, to the size impact minimum between the recessed contact surface.And, can prevent the danger that roller breaks away from from separator effectively, this danger is owing to the gap increase that increases between the roller chain causes that wherein separator is folded in this roller chain.
A twelveth aspect of the present invention is characterised in that: the either side according to the 6th to the tenth one side provides a kind of separator that is used for the linear guide part, and wherein recessed lubricant reservoir is formed on the contact surface of recessed surfaces part.By such structure, can make roller and separator carry out quiet run, suppress the wearing and tearing of roller and separator, further also suppressed generations such as operation noise.
Linear guide part of the present invention is characterised in that: comprise the separator that is used for the linear guide part, this separator is arranged between the roller as rolling element, and these separators can be limited by the either side in first to 12 aspect.
By adopting such structure, a kind of linear guide part is provided, this linear guide part can prevent bearing capacity decline effectively and suppress crooked effectively, improves operability by adopting simple structure.
A kind of linear guide part according to the present invention is characterised in that: this linear guide part is configured to guide arm.By this way, if arm is guided, the crooked of roller can be suppressed effectively, thereby roller and separator are operated stably.
An apparatus according to the invention (a kind of processing device of any form in the various forms) is characterised in that: comprise a kind of linear guide part according to above-mentioned aspect.
By adopting such structure, a kind of linear guide part is provided, this linear guide part can suppress bearing capacity effectively and descend and prevent crookedly, and adopts simple structure can improve operability.
In order to address the above problem, a thirteenth aspect of the present invention provides a kind of separator that is used for the linear guide part according to first aspect, wherein, guide rail has a roller guiding surface, slider has a carrier roller guiding surface, an a pair of changed course path and a roller return path, carrier roller guiding surface relative with the roller guiding surface and roller guiding surface have formed a roller track jointly, a pair of changed course passage communicates with the two ends of roller track, this roller return passage communicates to the changed course passage with this, continuous circulating path is by this roller path, this is formed commutation path and this roller return path, the linear guide part has guide slot in continuous peripheral passage, this guide slot is continuous being provided with on the direction of rolling element, and this is guided by guide slot arm; Lubricant reservoir part partly is an opening in each recessed surfaces, and the opening of lubricant reservoir is less than the outside dimension of arm, thereby has stoped arm to be fitted into the lubricant reservoir part.
A fourteenth aspect of the present invention provides a kind of separator that is used for the linear guide part according to the 13 aspect, wherein the overall dimensions of open part is less than the overall dimensions of arm, and wherein this overall dimensions is perpendicular to the arm size of arm cross section part longitudinally.
The invention is characterized in a kind of linear guide part, the feature of this linear guide part has been to use a kind of separator.This separator is used for the linear guide part that limited by the 13 or the 14 aspect.
If separator of the present invention is used for a kind of linear guide part, the sidepiece of each roller can both be folded between the recessed surfaces of adjacent separator.And fix by adjacent separator recessed surfaces.Further, the position of roller can be aimed at by the arm that is formed on the separator.Therefore, if separator of the present invention is used for this linear guide part, axial fluctuation (crooked) in its roller elements and the mutual Recombinant Interferon between its roller elements are reduced, thereby can make rolling element shuttling movement more stably.
The lubricant reservoir part is an opening on the roller contact surface.Therefore, if separator of the present invention is used for this linear guide part, rolling element can roll more reposefully, and the premature wear of rolling element and the generation of noise can be suppressed.
In addition, according to a thirteenth aspect of the invention, the open part of lubricant reservoir is less than the external shape of arm, thereby constituted separator.According to a fourteenth aspect of the invention, the overall dimensions of open part is less than the overall dimensions of arm, and wherein, this overall dimensions is perpendicular to the arm size of cross section longitudinally.Therefore, can stop arm to be fitted in the lubricant reservoir.For example, even separator is aimed at automatically as parts feeder or similar component, also can prevent to twine mutually between the separator.Thereby, a kind of separator that is used for the linear guide part is provided, the automation that this linear guide part is convenient to produce also can improve the productivity of linear guide part.A kind of linear guide part is provided, has been used for the separator that is used for the linear guide part that the 13 aspect and 14 aspects are limited owing to used, this linear guide part has lot of advantages.
The phrase " arm is fitted into the lubricant reservoir part " that uses means that at this arm of a separator in a plurality of separators is fitted in the lubricant reservoir part of another separator, thereby these separators block mutually.
Further, word " outside dimensions of arm " expression helps arbitrary size of " arm is fitted into the lubricant reservoir part ".For example, if only be a rectangular perpendicular to the cross section of arm longitudinally, the size that helps to assemble is corresponding to four side length and rectangular catercorner length.If cross section is annular, this size is corresponding to the diameter of annular, if cross section has another combinatorial geometry shape, this size is the each several part size of a certain shape, and this shape projection is on the direction that helps to make the arm assembling.
According to the separator that is used for the linear guide part of the present invention, a kind of linear guide part not only is provided, a kind of separator that uses with the linear guide part also is provided, this linear guide part can improve the productivity of linear guide part.
In order to achieve the above object, a fifteenth aspect of the present invention provides a kind of linear motion device, it has: a guide rail, this guide rail comprises rolling surface: a slider, comprise and the opposed rolling surface of the rolling surface of guide rail, and guide by guide rail by a plurality of rolling elements, rolling element is interposed between the rolling surface, so that relative movement mutually; An and separator, be interposed between the adjacent rolling element, and comprise the recessed surfaces part, this recessed surfaces partly be formed on opposed described each dividing plate of described rolling element (spacer) part in, wherein, to be arranged on wrapping angle be in 19 ° to 35 ° the scope to the contact position between separator recessed surfaces part and the rolling element.
A sixteenth aspect of the present invention provides a kind of separator that is used for linear motion device, it has: a guide rail, this guide rail comprises rolling surface: a slider, comprise and the opposed rolling surface of the rolling surface of guide rail, and guide by guide rail by a plurality of rolling elements, rolling element is interposed between the rolling surface, so that relative movement mutually; An and separator, be interposed between the adjacent rolling element, and comprise the recessed surfaces part, this recessed surfaces partly be formed on opposed described each dividing plate of described rolling element (spacer) part in, wherein, the cross section of recessed surfaces part arched door formula (gothicarch) shape that partly tapers off to a point; The diameter of rolling element represents that with Dw the wrapping angle between separator and the rolling element is represented with θ; The folder end arch gate-type groove radius of recessed surfaces part is represented with R; The bottom portion of groove thickness of separator recessed surfaces part represents that with 2 δ the radius of curvature of recessed surfaces part is with " f " expression, and the wrapping angle θ of separator satisfies following equation (1) to (3):
0.5Dw*sinθtanθ＝δ+R(cosθ
0-cosθ) (1)
θ
0＝sin
-1[{(2f-1)/(2f)}sinθ] (2)
f＝R/Dw (3)
A seventeenth aspect of the present invention provides a kind of linear motion device, it has: a guide rail, this guide rail comprises rolling surface: a slider, comprise and the opposed rolling surface of the rolling surface of guide rail, and guide by guide rail by a plurality of rolling elements, rolling element is interposed between the rolling surface, so that relative movement mutually; An and separator, be interposed between the adjacent rolling element, and comprise recessed surfaces part, this recessed surfaces partly be formed on opposed described each dividing plate of described rolling element (spacer) part in, wherein the cross section of recessed surfaces part partly forms single circular-arc; The diameter of rolling element represents that with Dw the wrapping angle between separator and the rolling element is represented with θ; The circular groove radius of recessed surfaces part is represented with R; The bottom portion of groove thickness of separator recessed surfaces part represents that with 2 δ the radius of curvature of recessed surfaces part is with " f " expression, and the wrapping angle θ of separator satisfies following equation (4) to (5):
0.5Dw*sinθtanθ＝δ+R(1-cosθ) (4)
f＝R/Dw (5)
According to the 17 aspect, a eighteenth aspect of the present invention will provide a kind of separator that is used for the linear guide part, wherein, the contact position scope between separator recessed surfaces part and the rolling element is set in ± 10 ° scope in.
Can use a kind of linear guide part, this linear guide part comprises the separator that is limited by the either side in first to the tenth eight aspect.
According to the present invention, consider by lubricant oil or grease or analog and cause the radial length that separator expands, and separator (radial expansion causes the pitch between the rolling element to reduce in the expanded thickness on the thickness direction (i.e. the radial thickness of Peng Zhanging), expansion on the thickness direction causes the pitch between the rolling element to increase), the recess part of separator contacts with rolling element with a certain wrapping angle, at this wrapping angle place, the change of separator on thickness direction diminishes, thereby, reduced the dimensional changes of the separator that caused by expansion, this expansion causes that the pitch between the rolling element changes.Therefore, the pitch variation between the rolling element that has suppressed to cause by expansion effects, wherein these expansions are caused by lubricant oil and grease or analog, thereby are readily embodied in the raising of operability, low noise and low-cost endurance aspect.
Description of drawings
Fig. 1 is the perspective view of linear guide part;
Fig. 2 is the local positive view of linear guide part shown in Figure 1;
Fig. 3 is the cross-sectional view along III-III line shown in Figure 2;
Fig. 4 is the side view of separator shown in Figure 3;
Fig. 5 is the planimetric map of separator shown in Figure 3;
Fig. 6 is the front view of separator shown in Figure 3;
Fig. 7 is the longitudinal cross-section figure along VII-VII line shown in Figure 6;
Fig. 8 is the view that expression is formed on the separator guiding surface on the slider body inner surface;
Fig. 9 is a perspective view (comprising partial cross-section), the simple structure of the linear guide part (a linear guide part) of expression one embodiment of the present of invention;
Figure 10 is the view (comprising partial cross-section) of the linear guide part in the expression present embodiment, and this figure observes along the direction of linear motion shown in Fig. 9;
Figure 11 represents the roller in the present embodiment and the view of separator, and wherein this figure is along observing perpendicular to the direction of raceway face;
Figure 12 represents the roller shown in Figure 11 and the view of separator, and wherein this figure is that property moving direction along the line is observed;
Figure 13 is the cross-sectional view along A-A line shown in Figure 12;
Figure 14 represents the roller shown in Figure 11 and the view of separator, and wherein this figure observes along the direction that is parallel to roller axle (axis);
Figure 15 represents the view of " arm " length in the present embodiment;
Figure 16 represents the view of " arm " length in the present embodiment;
Figure 17 represents the view of the roller chain in the present embodiment;
Figure 18 represents the view by the wrapping angle that limits between " separator " and " roller " in the present embodiment;
Figure 19 represents the view of present embodiment " recessed surfaces " height;
Figure 20 represents the view of " decline " amount;
Figure 21 represents the graph of a relation between " from the reference position to the roller center apart from S " and " (drop) amount that descends B ";
Figure 22 represents the view of an example on the R inclined-plane of separator main body in the present embodiment;
Figure 23 represents the view of an example on the R inclined-plane of separator main body in the present embodiment;
Figure 24 A represents the view of an example of lubricant reservoir of the present invention;
The view of the lubricant reservoir shown in Figure 24 B presentation graphs 24A, this view are that property moving direction along the line is observed;
Figure 25 A represents the view of another example of lubricant reservoir of the present invention;
The view of the lubricant reservoir shown in Figure 25 B presentation graphs 25A, this view are that property moving direction along the line is observed;
Figure 26 is a descriptive view, the partial sectional view of the part of expression linear guide part, and wherein this linear guide part has the separator that is used for linear guide part of the present invention;
Figure 27 is the cross-sectional view along the linear guide part of X-X shown in Figure 26;
Figure 28 is a descriptive view, represents the fundamental characteristics of the linear guide part shown in Figure 26 in the amplification mode;
Figure 29 is a descriptive view, represents the fundamental characteristics of the linear guide part shown in Figure 26 in the amplification mode;
Figure 30 is the separator of the present invention enlarged view of (being used for the linear guide part), and wherein Figure 30 A is the front view of separator, and Figure 30 B is the planimetric map of separator, and Figure 30 C is the right elevation of separator;
Figure 31 A, B are partial enlarged drawings, represent that separator of the present invention (being used for the linear guide part) has constituted roller chain, and it is interposed between the adjacent roller;
Figure 32 A, B are descriptive views, represent separator of the present invention another embodiment of (being used for the linear guide part);
Figure 33 A, B are descriptive views, represent separator of the present invention another embodiment of (being used for the linear guide part);
Figure 34 A, B are descriptive views, represent separator of the present invention another embodiment of (being used for the linear guide part);
Figure 35 A, B are descriptive views, represent separator of the present invention another embodiment of (being used for the linear guide part); With
How mutually Figure 36 A, B are descriptive views, represent separator of the present invention (being used for the linear guide part) assembling;
Figure 37 is a descriptive view, expression linear guide part bearing, and this bearing is an example in the present embodiment of the present invention;
Figure 38 is a plotted curve, and expression is corresponding to wrapping angle θ on each different δ values and the relation between the rolling element radius Dw, and wherein at this wrapping angle θ place, the size of the separator that causes owing to expanding changes and will diminish;
Figure 39 is a plotted curve, represents the wrapping angle θ of each its roller elements radius Dw and the relation between the δ, and wherein at wrapping angle θ place, the size of the separator that causes owing to expanding changes and will diminish;
Figure 40 is descriptive view, the linear guide bearing of expression another embodiment of the present invention;
Figure 41 is a partial sectional view, and the linear guide bearing of roller shape roller as rolling element used in expression, and wherein this bearing is an example of direct acting type device;
Figure 42 A, B represent that separator is interposed in the view between the adjacent cylindrical roller, and wherein Figure 42 A represents the linear motion zone, and Figure 42 B represents the passage region that alters course;
Figure 43 represents the view of separator, and wherein this view is observed along the cylindrical roller sense of rotation;
Figure 44 is the top view of Figure 43;
Figure 45 is the side view of Figure 44; With
Figure 46 is a plotted curve, the relation between expression wrapping angle θ and the difference in size, and wherein difference in size is present between the expansion radial length of expansion length on the thickness direction of separator and separator;
Embodiment
Referring to accompanying drawing, will be described one embodiment of the present of invention below.
Fig. 1 to 8 represents one embodiment of the present of invention.Fig. 1 is the perspective view of linear guide part.As shown in the figure, linear guide part 10 comprises guide rail 11, is arranged in slider 12 and a plurality of rolling element 13 that combines with slider 12 (referring to Fig. 2 and 3) on the guide rail 11 in a movable manner.One concave race 14 strides across on the surface, the left and right sides that vertically is formed on guide rail 11 of guide rail 11.
As shown in Figure 1, raceway 14 comprises raceway face 141 and 142.The raceway face 141 in the raceway face 141 and 142 and the formed angle in side of guide rail 11 are greater than 90 ° (as 135 °), and wherein this raceway face 141 is on the high position in the drawings.Further, the raceway face 142 that is in lower position in the drawings on the direction relative with raceway face 141 with the formed angle in the side of guide rail 11 greater than 90 ° (as 120 °).
Raceway 16 has raceway face 161 and 162 (referring to Fig. 2).The formed angle of the inner surface with slider body 121 in the raceway face 161 and 162 of raceway face 161 is greater than 90 ° (as 135 °), and wherein this raceway face 161 is arranged on the upper position.Further, be arranged on the locational raceway face 162 of figure low and middle-end on the direction relative with raceway face 161 with the formed angle of the inner surface of slider body 121 greater than 90 ° (as 135 °).Raceway face 161 and 162 and the raceway face 141 and 142 of raceway 14 be oppositely arranged.One be used on the guide rail 11 vertically on the rolling element raceway 17 (referring to Fig. 3) of rolling rolling element 13, be formed between raceway face 141 and 161 and between raceway face 142 and 162.
When slider 12 during along the vertically moving of guide rail 11, rolling element 13 rolls in rolling element raceway 17, and rolls in rolling element changed course passage 20 and rolling element return passage 21 further.Further, rolling element 13 is made into the cylindrical rollers shape.The rolling element 13 that rolls between raceway 141 and 161 is supported by rolling element fixing-assembly 30 and 31.The rolling element 13 that rolls between raceway 142 and 162 is fixed by rolling element fixing-assembly 31 and 32.Further, each rolling element 13 is by metal, and pottery or similar material are made.Further, separator 22 (referring to Fig. 3) is interposed between the rolling element of roller shape, and the material of wherein making this separator 22 is softer than the material of making rolling element (as resin).
As shown in Figs. 4-6, separator 22 comprises separator main body 221 and a pair of arm 222,222 that is arranged on separator main body 221 each end.Separator guide slot 26 (referring to Fig. 2) is formed on rolling element changed course passage 20, rolling element return passage 21 and the rolling element fixing-assembly 30 to 32, and wherein this separator guide slot 26 is used for along the arm 222 of the rotating direction guiding separator 22 of rolling element 13.
Arm 222,222 and separator 22 whole formation are so that the two ends of arm 222,222 are at vertical upper process of separator 22.As shown in Figure 4, the length L of arm 222,222 will be lacked than the centre distance of two adjacent rolling elements 13,13, and wherein separator main body 221 is interposed between this two adjacent rolling element 13,13.Preferably, length L approximately is 50% to 98% of a rolling element diameter.The height H of arm 222,222 (referring to Fig. 4) approximately is 20% to 60% of an its roller elements diameter.
The lateral length L of separator main body 221
1(referring to Fig. 5) is shorter than the axial length of rolling element 13 slightly.Therefore, at least one arm in the arm 222,222 is configured to the end axial surface of touch scrolling element 13.Separator main body 221 has recessed surfaces part 23,23, and this recessed surfaces part 23,23 is arranged on each side of separator main body 221 circumferential section of recessed surfaces part 23,23 touch scrolling elements 13 with respect to the fore-and-aft direction of separator main body 221.Clearance groove 24 is formed on the center of each recessed surfaces part 23 along the circumferencial direction of rolling element 13, the width of this clearance groove 24 approximately be rolling element axial length 1/3.One through hole 25 also is formed on the center of each recessed surfaces part 23, to run through recessed surfaces part 23 on the fore-and-aft direction of separator 22.
Separator main body 221 has both side surface part 221a on side direction, 221b (referring to Fig. 5 and 6).Both side surface part 221a, side surface among the 221b is adjacent to raceway face 161, and the separator guiding surface 33a (referring to Fig. 8) that contact is formed on the inner surface of slider body 121 contacts, or is adjacent to raceway face 162 and contact separation device guiding surface 33b. Separator guiding surface 33a, 33b forms, and grinds simultaneously with raceway 161,162 by grindstone (not describing) integral grinding.Surperficial contact separation device guiding surface 33a of any of rolling element 13 left and right side surface portions and 33b.A plurality of bolt holes 27 (referring to Fig. 1) vertically substantially equally spaced are formed on the upper surface of guide rail 11 along accompanying drawing middle guide 11.In the drawings, the screw 28 that is used for installing slider is formed in a plurality of zones of upper surface of slider body 121.
As mentioned above, prevented to produce the gap between rolling element 13 and the separator main body 221, and the quantity that has finally suppressed to be arranged on the rolling element of bearing area reduces, the linear guide part that discloses among the JP-B-40-24405 also has this advantage, this is because the length L between the arm 222 of separator main body 22 is shorter than the centre distance of two adjacent rolling elements 13,13.Therefore, be in contact with one another between crooked and the rolling element suppressing under the situation that does not reduce bearing capacity.And, having suppressed the rotational resistance of separator 22 and be partial to rolling element 13, the disclosed linear guide part of JP-A-2001-132745 has this advantage.Therefore, can produce the effect that suppresses crooked effectively.
Because the height H of arm 222 is 20% to 60% of rolling element 13 diameters, separator main body 221 can be strengthened by arm 222, can guarantee the end surface of rolling element 13 and contact between the raceway of this end surfaces to have sufficient contact area.
In addition, because clearance groove 24 is formed on the center of recessed surfaces part 23 along the circumferencial direction of rolling element 13, the contact area between rolling element 13 and the separator 22 is limited on the left and right sides of separator.Therefore, can improve the operability of linear guide part when the repressed while of crooked energy of rolling element 13.Further, because the center that through hole 25 is formed on recessed surfaces part 23 to be running through the recessed surfaces part on the fore-and-aft direction of separator main body 221, oiling agent can be stored in the through hole 25 and the oiling agent that is stored in the through hole 25 can be fed in the rolling element 13 with being stabilized.The separator guiding surface 33a of the lateral parts of touch scrolling element 13,33b is arranged on the inner surface of slider body 121.Therefore, the position of separator 22 and rolling element 13 becomes stable, thereby has suppressed the crooked of rolling element 13.
The present invention is not limited only to the foregoing description.For example, in this embodiment, the length L between the arm 222 is shorter than the centre distance of two adjacent rolling elements 13,13.But the length L between the arm 222 can equal the centre distance of two adjacent rolling elements 13,13.In the aforementioned embodiment, the width of clearance groove 24 approximately be rolling element 13 axial length 1/3rd.But this width is not limited only to about 1/3rd.For example, this width can approximately be 1/4th to 1/2nd of this well width.
By following accompanying drawing one embodiment of the present of invention are described.
Fig. 9 schematically shows the structure (comprising the partial cross-section part) of linear guide part 301 according to the first embodiment of the present invention.
As shown in Figure 9, in the linear guide part 301 in the present embodiment, slide member 330 is configured to can linearly moving mode assembling and straddle around guide rail 320.Reference character 370 expressions one end cap, 380 expressions, one side seals.
Figure 10 is the guide rail 320 observed along direction of linear motion shown in Figure 9 and the view (comprising the broken section part) of slide member 320.As shown in figure 10, a raceway groove 321 is formed on the either side of guide rail 320.Raceway groove 321 is formed on the bi-side of guide rail 320 and forms concavity, and it is the cross section of V-arrangement basically that this concavity has.
As shown in Figures 9 and 10, slide member 330 around guide rail 320 (wherein extend perpendicular to the direction on the plane of Figure 10 on these guide rail 320 edges) assembling has convex portion 331, this convex portion 331 is relative with raceway groove 321 on being formed on guide rail 320, and the convex shape of this convex portion 331 forms has the convex of V-arrangement cross section.
Surface with raceway groove 321 of V-arrangement cross section has constituted the raceway face 322A that is used for roller 340,322B.The surface of convex portion 331 has constituted the raceway face 332A that is used for roller 340,332B, and wherein this convex portion 331 is towards raceway face 332A, 332B, and have the V-arrangement cross section.Raceway face is preferably carried out highi degree of accuracy and is ground.
A plurality of rollers 340 as cylindricality or cylindrical rolling element are interposed between the raceway face 332A (or 332B) of the raceway face 322A (or 322B) of raceway groove 321 and convex portion 331.Separator (resolution element) 350 is interposed between the roller 340.Figure 10 only represents the right half of guide rail 320 and with respect to the right half of the slide member 330 at guide rail 320 centers.But, the left half of the guide rail of representing among Figure 10 320 with constitute in the mode identical (promptly around guide rail 320 central shafts to symmetrical manner) with respect to the left half of the slide member 330 at guide rail 320 centers with right half.
At this, will the separator 350 that is interposed between the roller 340 in the present embodiment be described.
As shown in figure 11, the separator 350 of present embodiment comprises the separator main body 351 that is interposed between the roller 340, be used for guiding the arm 352 of the end face 341 of roller 340, and wherein this roller 340 is arranged on separator main body 351 each side and the bridging portion 353 that is used for being connected separator main body 351 and arm 352.Separator 350 can integral body be made, as adopting resin material.
As Figure 12, shown in 13 and 14, separator main body 351 is constructed such that recessed roller receiver portion 354 is arranged on each side of separator main body 351, and each recessed roller receiver portion 354 contacts the cylindrical excircle part of the roller 340 that is arranged on each side and holds this outer circumferential portion.On the surface 355 that is formed on receiver portion 354 as the groove 356 and the through hole 357 of lubricant reservoir, these receiver portion 354 contact rollers 340 wherein.Only has only a groove 356 in the example that present embodiment is represented.But, can form a plurality of grooves 356 according to needed lubrication property.In like manner also can form a plurality of through holes 357.And according to required lubrication property, any in groove 356 and the through hole 357 can be cancelled.As an alternative, groove 356 and through hole 357 can be cancelled.
As shown in Figures 9 and 10, circulation canal 333A is provided with Circulation pipe 334A, so that roller 340 and separator 350 shuttling movement reposefully, thereby roller 340 and separator 350 are rolled on raceway face 322A and 332A.Circulation canal 333B is provided with Circulation pipe 334B, so that roller 340 and separator 350 shuttling movement reposefully, thereby roller 340 and separator 350 are rolled on raceway face 322B and 332B.Circulation pipe 334A, 334B are provided with and hold roller 340 and separator 350 and make roller 340 and the separator 350 guiding channel 335A of shuttling movement reposefully, 335B.Arm guide slot 336 is an opening on each Circulation pipe, thus towards guiding channel 335A, 335B, wherein this arm guide slot 336 is guided the arm 352 of separator 350 during the shuttling movement of roller 340 and separator 350.
From steady cycling or the manufacture cost aspect that is reached, Circulation pipe 334A, 334B preferably is formed from a resin.Changed course part 337A, 337A property along the line moving direction is arranged on each end of Circulation pipe 333A.The direction of linear motion that changed course part 337B, 337B follow endless tube 333B is arranged on each end of Circulation pipe 333B.In order to suppress the part 337A that alters course, the phase mutual interference between the 337B, circulation canal 333A, 333B preferably arrange in so-called chain mode.
As shown in figure 10, present embodiment is provided with end face guide member 361,362 and 363, is used for guiding the end face 341 of roller 340 and the arm 352 of separator 350.Therefore, the roller 340 or the crooked of similar component that are created in during the rolling motion can be suppressed effectively, thereby roller 340 is operated reposefully.
The slide member 330 of present embodiment is provided with the roller end face guided portion 338 of the end face that is used for guiding roller 40.Thereby the crooked or similar phenomenon that is created in during roller 340 rolling motions can be suppressed effectively, thereby roller 340 is operated reposefully.Roller end face guided portion 338 is that highi degree of accuracy grind to form, and and rolling surface 332A, 332B grinds formation simultaneously.
To describe the structure and the work effect of the separator 350 in the present embodiment below in detail.
Shown in Figure 11 to 14, each separator 350 in the present embodiment all has the arm 352 that extends towards the center of rotation (axle) of adjacent rollers 340.Arm 352 and separator main body 351 are connected together by bridging portion 353.Therefore, can improve the intensity of the roller contact segment of separator main body 351.Especially, if thereby for improving bearing capacity, the roller quantity that is arranged on the bearing area by increase shortens distance between the roller, and the roller contact segment of separator main body 351 goes up attenuation at movement direction (being the direction of linear motion).As a result, separator main body 351 is with weakened.But as shown in figure 14, by being arranged on the bridging portion 353 between arm 352 and the separator main body 351, the top and the connection between the bottom of separator main body 351 will strengthen, thereby strengthen separator main body 351.Reason can shorten the distance between the roller under the prerequisite that guarantees desirable strength for this reason.Therefore, even separator 350 is interposed between the roller, the roller quantity decrease that is arranged on the bearing area can be reduced to minimum, and the slippage of bearing capacity can be reduced to minimum.
Be respectively formed at the arm guide slot 361A of each end surface guide member 361,362 and 363,362A and 363A guiding arm 352.Therefore, roller 340 can be reduced to minimum from separator main body 351 disengagings or crooked chance.As previously mentioned, because bridging portion 353 has been strengthened separator main body 351, the recessed surfaces depth D epth of separator main body 351 (the roller quantity that promptly is received is referring to Figure 17) is increased.The increase of this degree of depth also can suppress the chance of roller disengaging effectively or suppress crooked.
Similarly, in the present embodiment, improved the fixed characteristic of roller, thereby suppressed to enter between the roller 340 of bearing area collision mutually and the tap-tap that sends, wherein in this bearing area, load is applied on the roller 340.Finally, the collision acoustic energy that is produced with end cap 370 mutual collisions by roller 340 is reduced, thereby a kind of low noise linear guide part can be provided, and then a kind of device that uses this linear guide part is provided.
As shown in figure 13, consider foregoing reinforing function, " height of arm 352 " preferably is equal to or greater than 30% of roller diameter.Simultaneously, at end surfaces 341 that guarantees roller 340 and the end face guide member 361 that is used for guiding roller end surfaces 341, under the prerequisite of the contact area between 362 and 363, in order to guide roller 340 reposefully, the height of arm 352 preferably is equal to or less than 50% of roller 340 diameters.Especially, perpendicular to " height of arm 352 " on the raceway face direction preferably roller diameter 30% to 50%.
To be described in " arm length " (referring to Figure 14) on the movement direction of arm 352 below.
" arm length " on the movement direction of arm 352 is set at a certain length, thereby the arm 352 that can prevent adjacent separator main body 351 in the whole circulation passage contacts with each other.Roller 340 and separator main body 351 are operated reposefully, slide member 330 can be moved linearly reposefully.
Therefore, for the length L (referring to Figure 14) of the arm 352 that is arranged on separator 350 1 sides, the arm 352 of separator 350 extends equal length in both sides towards the center of rotation of roller 340 with respect to moving direction, as shown in figure 15, suppose that roller diameter represents with Dwe, the centre distance of adjacent rollers is represented with kDwe, wherein separator 350 is interposed between the two adjacent rollers, radius from centre of motion O to the centrostaltic motion track of roller is represented (wherein this roller is positioned at roller changed course part 337A or 337B) with R, the radius of---the residing position of this envelope surface closely and by arm 352 (highly being A) limits to centrostaltic distance than dotted line, wherein the center of this dotted line connection adjacent rollers---is represented with Ri to envelope surface from centre of motion O.At this moment, the length L i of arm 352 1 sides (being the arm inside length), the residing position of this side is nearer to centrostaltic distance than dotted line, wherein this dotted line connects the center of adjacent rollers, with opposite side arm length L o (being outer webs minister degree), this side is arranged on centre of motion opposition side with respect to dotted line, and this dotted line connects the center of adjacent rollers, must satisfy following equation:
θ＝sin
-1{kDwe/(2R)}
0.3/2×Dwe＜A＜(R-Ri)
Li＜(kDwe/2-Asinθ)
Lo＜kDwe/2
Especially,, can avoid in the whole circulation path, being in contact with one another between the arm 352 Li and Lo above wherein this profile line satisfies in the equation if the profile line of arm 352 is cut into R shape or ellipse.
When satisfying Li=kDwe/2-Asin θ and Lo=kDwe/2, can obtain to adapt to most effectively shape.
As shown in figure 16, when the end of arm 352 forms single circular shape when (radius of this list circular arc is represented with A) on its movement direction, if the maximum value Limax of the length L i of arm 352 1 sides (being the arm inside length) is set at kDwe/2, wherein the residing position of this side is nearer to the distance of centre of motion O than dotted line, this dotted line connects the center of adjacent rollers, and arm 352 will disturb adjacent arm 352 (referring to the dotted line of Figure 16).At this, kDwe represents the centre distance of adjacent rollers, and wherein separator 350 is interposed between this adjacent rollers.
For fear of interference, suppose that the radius of the motion track from centre of motion O to the roller turn center represents with R, wherein this roller is arranged on roller changed course part 337A or 337B, the radius of---the residing position of this envelope surface closely and by arm 352 (highly being A) limits to centrostaltic distance than dotted line, wherein the center of this dotted line connection adjacent rollers---is represented with Ri to envelope surface from centre of motion O.At this moment, the maximum value Limax of inner webs minister degree Li must satisfy following equation:
θ′＝sin
-1(kDwe/2R)
Limax＝kDwe/2-A×(1-cosθ′)/cosθ′
When the arm 352 of separator 350 is configured to respect to direction of linear motion when the center of rotation of adjacent rollers is extended different length, extreme length Ls (being the total length that arm extends in each side of separator), apart from kDwe, wherein this adjacent rollers is arranged on each side of separator 350 less than the center of rotation of adjacent rollers in requirement.
Referring to Figure 17 and 18, " gap (at interval) " will be described below, when the chain of being made up of a plurality of rollers 340 and separator 350 during towards a side shifting, will produce this " gap (at interval) " with respect to moving direction.
" gap "---when the chain of being made up of a plurality of rollers 340 and separator 350 will produce this " gap (at interval) " (referring to Figure 17) with respect to moving direction when a side is provided with---can not be eliminated so that the operation in order to come held stationary by the absorption fluctuation, when roller when changing their direction, will produce this fluctuation on the length direction of roller chain in changed course part (337A or 337B).
On the contrary, if " gap " greater than desired value, arm 352 guiding or fixedly the ability of roller 340 with weakened, and suppress that roller breaks away from and the effect that suppresses crooked or similar phenomenon with weakened.
Therefore, according to the wrapping angle α that is limited between roller 340 and the recessed surfaces 355, wherein this recessed surfaces 355 is formed on the either side of separator main body 351, and contact and hold adjacent roller 340, consider and to improve the effect of holding roller, when α=0 (degree) (when recessed surfaces forms single arc groove shape, and when only having single point of contact), " gap "---produces this gap---and preferably is set at 1/2nd of the depth D epth that is equal to or less than recessed surfaces when roller chain is amesiality with respect to moving direction, perhaps when recessed surfaces forms folder end arch door shape (as shown in figure 18, have two point of contact), the gap preferably is set at 1/2nd of the product that is equal to or less than recessed surfaces depth D epth and cos α.
Referring to Figure 19 to 20, the height of the recessed surfaces of separator 350 (referring to Figure 13 or other similar figure) will be described below.
As shown in figure 20, when separator 350 is not interposed between the roller 340, the phenomenon of a point of contact is created in changed course part (337A, 337B), this point of contact exist and roller between, and this roller moves (referring to " slippage B " value among Figure 20) with respect to the movement locus of center of rotation to centre of motion O.When separator 350 was interposed between the roller 340, this phenomenon produced along with the decline of separator 350, as shown in figure 19.The decline of separator 350 causes that separator 350 is in changed course part contact changed course part (337A, inner circumferential portion 337B).
In the present embodiment, for the height of recessed surfaces, this highly is the distance from the dotted line that connects the adjacent rollers center to the end face of separator 350, the height H o of recessed surfaces is bigger than the height H i of recessed surfaces in the changed course part, wherein height H o is the distance from the dotted line that connects the adjacent rollers center of rotation to separator 350 ends (this end is for the O of the centre of motion), and wherein height H i is the distance from the dotted line that connects the adjacent rollers center of rotation to separator 350 nearest (this most proximal end is for the O of the centre of motion).
Referring to Figure 19 and 20, provided an embodiment more specifically.At this, when separator 350 was interposed between the adjacent rollers, the centre distance of this adjacent rollers was represented with kDwe; The radius of the movement locus from centre of motion O to the roller center that is positioned at changed course part (337A or 337B) is represented with R; With certain a bit is reference point, and wherein at this some place, roller moves on to the changed course part from the movement locus of roller center, and the distance from this reference point to roller center is represented (roller enter this value is a negative value before the changed course part) with S so; Separator 350 is represented with B from the slippage of roller center motion track near the changed course part.At this moment, the slippage of separator 350 is limited by following equation.
θ
7＝tan
-1(-R/S)
θ
8＝tan
-1(-R/kDwe×sinθ
3)
θ
3＝cos
-1{(2R
2+S
2-kDwe
2)/(2R×(R
2+S
2)
1/2)}
B＝kDwe/2×sin(θ
7-θ
8)
Especially, if use top formula, just determined the basic specification of roller 340 and separator 350.The slippage B of separator is only by the residing determining positions of roller.For example, when kDwe=4.2mm and R=6.05mm, according to top equation, the slippage B of separator as shown in figure 21.
In order to prevent the inner circumferential portion of separator 350 contact changed course parts, relation of plane under separator 350 can produce this phenomenon when the centre of motion descends, the recessed surfaces height of separator 350 is configured to satisfy: Hi＜roller diameter/2-B and Ho-Hi＜B.
Similarly, for the width (being the size of separator main body on movement direction) of separator main body 351, in the changed course part, the width " a " of separator end (this end is for the dotted line that connects the adjacent rollers center of rotation), width " b " more preferably greater than the separator most proximal end, (wherein this most proximal end is for the dotted line that connects the adjacent rollers center of rotation, as shown in figure 19).For width, be formed on separator 350 both sides and with the supposition of the suitable curvilinear surface of the outer peripheral surface of adjacent rollers 340 be a negative cruvature (i.e. a recessed surfaces).Therefore, if recessed surfaces height H i, Ho be configured to satisfy aforementioned requirement (promptly satisfy and concern Hi＜roller diameter/2-B and Ho-Hi≤B), at the width (being the size of separator on movement direction) " a " of the part separator main body 351 that alters course greater than width " b ".
Usually, separator has complicated shape, so separator is all considered low-cost the manufacturing in many cases.Reason can be used as the material of making separator by the plastics of die casting or man made rubber for this reason.But the linear guide part is a mechanical component, its usually use or the storage life chien shih with lubricator or anticorrosively use agent.Therefore, when separator was made by elastic material or man made rubber, it was difficult fully eliminating expansion.Therefore, when separator is interposed between the roller, with the centre distance generation considerable influence of pair of rollers rotatingshaft.In separator, height is greater than the size between the recessed surfaces, and wherein this recessed surfaces is arranged on the separator both sides and holds the roller that is in contact with one another.Reason expands if produce for this reason, and the prolongation on the roller short transverse is big.Tend to diminish at the interval that influences between the lower concave surface that prolongs.Therefore, will have the danger that roller breaks away from from separator, this is to cause that because of the gap between the rolling chain increases wherein separator is interposed in this rolling chain.
Therefore, in the present embodiment, in order to make the expansion effects minimum at the interval between the recessed surfaces, the contact segment that forms between the recessed contact surface 355 that surface of contact 355 makes roller 340 and separator 350 is in a certain position, in this position, be formed on the size minimum between the recessed contact surface 355 of separator 350 both sides.Especially, when recessed contact surface 355 was a single circular arc, surface of contact 355 optimum sizes were R (radiuses), and this size R is greater than half of the maximum diameter of roller 340.
Because plastics or man made rubber are more yielding than metallic material, elasticity takes place and changes in gap between the roller chain (wherein separator is interposed between this roller chain) probably, roller takes place so probably break away from.Reason for this reason shown in Figure 11 and 12, by making axial length that separator main body 351 makes progress in roller axle less than roller length, can suppress crooked.Further, by making width " a ", can guarantee to hold the optimum value of the degree of depth greater than the width shown in Figure 19 " b ".By making width " a " greater than the width shown in Figure 19 " b ", changed course part 337A, the effect that 337B holds roller will be enhanced.Therefore, the roller break-off that is produced when guide rail 320 is removed when slide member 330 is suppressed.
Shown in Figure 22 and 23, in separator 350, R inclined-plane or analogous shape are arranged in the edge of the recessed surfaces of separator main body 351 part.Also can adopt the C inclined-plane to replace the R inclined-plane.
Present embodiment has been described a kind of structure, in this structure, has groove 356 and through hole 357 as lubricant reservoir, as shown in figure 12.And the structure of lubricant reservoir is not limited in this embodiment.More particularly, for example, can adopt the structure shown in Figure 25 A-25B.
In Figure 25 A-25B, reference character 358 expressions are formed on the volute groove that is positioned near the recessed contact surface 355 of contact segment, wherein this contact segment is between contact surface 355 and roller 340, thereby improves the effect of lubricant reservoir in a wider context.In order to reduce manufacture cost by the error of eliminating in the machining operation, volute groove 358 can be formed on the whole contact surface 355.
In the linear guide part in the present embodiment of having described so far, the contact surface 355 of the separator main body 351 of separator 350 forms concavity.Therefore, can hold roller 340 well.Further, even separator 350 is interposed between the roller, the center of rotation of adjacent rollers is apart from can be minimum, and be arranged on the roller quantity of bearing area can be minimum.
Further, if the surface of contact 355 of separator 350 has groove 356, through hole 357 and volute part 358 have then improved lubrication property, and have suppressed the wearing and tearing of roller 340 and separator 350.
In the separator main body 351 in the present embodiment, if arm 352 is prevented from contact separation device main body 351, if and separator main body 351 is increased as far as possible at the axial length that roller axle makes progress, under the situation of the easy motion that does not weaken roller, can suppress the motion that is not suitable for of roller effectively.Therefore, roller can be braked and the crooked of roller can be suppressed effectively reposefully.
The structure of describing in the present embodiment is an example only, can improve present embodiment in technical spirit scope of the present invention.
The embodiment who is used for the linear guide part of the embodiment of separator of linear guide part and this separator combines in the present invention, runs through whole invention, will be described in detail them below.
Figure 26 is descriptive view, the partial sectional view of expression linear guide part, and wherein the separator that is used for the linear guide part among the present invention also combines with this linear guide part.Figure 27 is the cross-sectional view along the linear guide part of X-X line shown in Figure 26.
Shown in Figure 26 and 27, linear guide part 410 has guide rail 412 and slider 416, and this guide rail 412 has roller guiding surface 414; Slider 416 straddles on guide rail 412 in relatively-movable mode, and has carrier roller guiding surface 418, and this carrier roller guiding surface 418 is oppositely arranged with roller guiding surface 414.
Two roller guiding surfaces 414 longitudinally are formed on the either side surface of guide rail 412; That is to say, always have four roller guiding surfaces 414 and form in the vertical.Slider 416 is made of slider body 417 and end cap 422, and wherein end cap 422 is connected arbitrary axle head of slider body 417.
When slider body 417 and end cap 422 consecutive hours each other in the axial direction, they have the cross section of basic C shape.The changed course passage 424 that end a pair of and carrier roller guiding surface 418 is connected is formed on the end cap 422.Slider 416 is made of slider body 417 and the end cap 422 that is connected slider body 417 axle heads.
Limit between the carrier roller guiding surface 418 of one space---this space by the roller guiding surface 414 of guide rail 412 and slider body 417, wherein carrier roller guiding surface 418 is oppositely arranged with roller guiding surface 414---constituted a roller path 426.In four continuous circulation canals 428 each is made of a pair of changed course passage 424, one roller return passages 420 and roller path 426, and wherein four circulation canals 428 are continuous annularly each other.
A plurality of cylindrical roller 446 as rolling element are carried in the circulation canal 428.The separator main body 451 of separator 450 is interposed between the adjacent roller 446, and wherein separator 450 is made of separator main body 451 and arm 452.More particularly, roller 446 is interposed in the roller surface of contact 454a of the separator main body 451 of adjacent separator 450, between the 454b.By this to crooked can be suppressed of arm 452,452 rollers 446 on aligning direction.By this way, roller 446 separated devices 450 limit, thereby have constituted the chain of separator 450 and roller 462.
In addition, will describe a certain zone of linear guide part 410 below in detail, wherein in this zone, synthesize roller chain 462.
Shown in Figure 26 and 28, except forming the zone of carrier roller guiding surface 418, the separated device guide member 440 of the inner side surface of slider body 417 covers, and these separator guide member 440 usefulness synthetic resin or similar material are made.And, separator guide member 440 and and the guide rail 412 that is oppositely arranged of separator guide member 440 between form a little gap.
Groove---carrier roller guiding surface 418 and separator guide member 440 insert wherein---is formed on the basic C shape inside part of slider body 417.More particularly, owing to separator guiding wall 436b is formed by separator guide member 440, so formed this groove.Distance W 1 between the separator guiding walls 436b is a bit larger tham the cylindrical portion length L of roller 446, wherein separator guiding walls 436b roller 446 axially on positioned opposite to each other.The guide slot 438b that is meshed with the arm 452 of separator 450 is formed on the separator guiding walls 436b in the vertical continuously.The width G of separator guiding walls 436b is a bit larger tham the height U of arm 452, and therefore, arm 452 can be sliding engaged in the inboard of guide slot 438b.
Shown in Figure 27 and 29, roller return passage 420 is formed on the thick sleeve part of C shape of slider body 417, so that it is spaced apart and be parallel to carrying guiding surface 418 with carrying guiding surface 418.Roller return passage 420 is formed by through hole 432, and the annular cross section of this through hole 432 extends in the vertical continuously and Circulation pipe 430 injects in this through hole 432.
The wall portion of Circulation pipe 430 is also as separator guiding walls 436a, and wherein, Circulation pipe 430 is oppositely arranged with the both sides of the roller 446 that moves in Circulation pipe 430.Guiding walls 438a is formed on the separator guiding walls 436a in the vertical continuously, and this guiding walls 438a has a certain width so that its mode with engagement is guided arm 452.Especially, the width J of guide slot 438a is a bit larger tham arm height U.Therefore, the arm 452 of separator 450 can be sliding engaged in the inboard of guide slot 438a.
As shown in figure 27, a pair of curved changed course passage 424 is formed on the end cap 422, and the passage 424 that wherein alters course is connected with carrier roller guiding surface 418 and communicates with roller return passage 420.Changed course passage 424 is by continuous and be that curved through hole forms in the vertical.
Especially, the cross section of inner space of changed course passage 424 is rectangulars, and this rectangular is suitable with the tube portion shape of the roller 446 of projection in the vertical, thereby makes roller 446 can pierce into the passage 424 that alters course.The wall portion of changed course passage 424 is also as the separator guiding walls, and wherein, changed course passage 42 is oppositely arranged with the both sides of the roller 446 that moves in changed course passage 42.Roller 446 axially on size between the separator guiding walls positioned opposite to each other be a bit larger tham the tube minister degree L of roller 446.The height of rectangular cross section is a bit larger tham the diameter Dw of roller 446.Therefore, the roller chain 462 that is made of roller 446 and separator 450 can move in the inner space of changed course passage 424 reposefully.In changed course passage 424, whole roller chain 463 is all moving when rolling.Therefore, consider that the slewing area of radius of curvature and arm 452 is suitable, the guide slot width in the changed course passage 424 is by wide a little.The cross section of changed course passage 424 is identical with the Circulation pipe 430 of roller return passage 420.Therefore, the cross section part of changed course passage 424 is described in this omission.
Then, referring to Figure 30 A-31B, will describe separator 450 in detail below.Figure 30 is the enlarged view of separator 450, and Figure 30 A is the front elevation of separator 450, and Figure 30 B is the planimetric map of separator 450.Figure 30 C is the right elevation of separator.Figure 31 is a partial enlarged drawing, and expression roller chain 461 is made of the separator 450 that is interposed between the roller 446.
The height V of separator main body 451 is less than the diameter Dw of roller 446.A roller surface of contact 454a and an adjacent roller 446 are oppositely arranged, and wherein this roller surface of contact contacts with this adjacent roller 446 independently.Another roller surface of contact 454b and adjacent roller 446 are oppositely arranged, and on wherein opposite with the roller surface of contact 454a direction, roller surface of contact 454b contacts with adjacent roller 446 independently.Roller surface of contact 454a, 454b is by forming (being to be groove surface in the present embodiment) with the suitable groove surface of outer peripheral surface S, to such an extent as to roller 446 can support with being rotated and be fixed between the neighboring separator 441, wherein outer peripheral surface S is the rolling surface of roller 446.
Shown in Figure 30 B and 30C, for kind of lubricant storage, be penetrated into the lubricant reservoir 456 of roller contact surface 454b from roller contact surface 454a, be formed on roller contact surface 454a from open part 456a, on the 454b, each open part 456a has predetermined shape (promptly being rectangular in the present embodiment) and preliminary dimension.
A pair of arm 452,452 can stably roll in continuous circulation canal 428 along a certain direction, on this direction, roller 446 continuously with the axial alignment of the roller 446 that is parallel to each other.More particularly, arm 452,452 extends at the center to adjacent roller 446 from the end of separator main body 451, and along the end face projection of roller 446.Further, each arm 452,452 has the groove of being guided 438a, the predetermined altitude U of 438b guiding.Shown in Figure 30 B, the interval E between a pair of arm 452 is a bit larger tham the tube minister degree L of roller 446.The height U of arm 452 (referring to Figure 30 A) is slightly smaller than the width of guide slot 438a and 438b.Therefore, the arm 452 of separator 450 can be sliding engaged in the inboard of guide slot 438a and 438b.
Normally, for increase the amounts of lubrication that is stored in lubricant reservoir 456 and reduce lubricant reservoir 456 and roller 446 between area of contact, the open part 456a size of lubricant reservoir 456 increases, thereby, when the slip resistance of pair of rollers reduced, lubrication effect strengthened.Therefore, open part 456a is become in a certain scope and can reach this effect greatly.Wherein, in this scope, can guarantee the rigidity of the separator main body 451 of separator 450.
But, be not this separator to be used for a certain product just can reach the desired effect and function of separator.For example, adopting function (functional) shape that helps to boost productivity is an important requirement.Especially, a major issue that is faced is to adopt a kind of function shape that the productivity of assembly operation is improved, this assembly operation is that separator 450 is interposed between the adjacent roller 446, then these separators that inserted and put 450 is injected in the continuous circulation canal 428.
For separator 450, it adopts a geometrical shape to use and automatically aims at machine, as parts feeder or analog, so that easily aim at separator and by using robot or analog to assemble the separator of aligning continuously.
Shown in Figure 30 C, can fully address these problems in order to make separator 450, separator 450 is configured to have arm 452---it has the structure that constitutes roller chain 462---with lubricant reservoir 456.The overall dimensions of lubricant reservoir 456---comprise height Y and width Z, Diagonal Dimension with lubricant reservoir 456, wherein height Y and width Z define the inner diameter of lubricant reservoir 456 oblong openings 456a---less than another overall dimensions, this overall dimensions comprises height U and width T, and Diagonal Dimension, wherein height U and width T define the outside dimension of arm 452.Especially, arm 452 has an external shape so that the free end of arm 452 can not be fitted among the open part 456a of lubricant reservoir 456 parts, and wherein lubricant reservoir 456 is formed on roller contact surface 454a and the 454b.
To describe the action effect of the linear guide part 410 that uses separator of the present invention below in detail.
In having the linear guide part 410 of previous constructions, when slider 416 along guide rail 412 axially on guide rail 412 when mobile, roller 446 moves in continuous circulation canal 428 when rolling, and separator 450 also moves in continuous circulation canal 428 together in company with roller 440.At this moment, the separator main body 451 of the separator 450 in the continuous circulation canal 428 promotes to be arranged on the roller 446 of separator main body 451 fronts along the movement direction of separator main body 451.Further, roller 446 promotes to be arranged on another separator main body 451 of these roller 446 fronts along its movement direction.In brief, whole roller chain 462 repetitive cycling in continuous circulation canal 428.
Move with the opposite direction that slider 416 moves on roller chain 462 edge in roller path 426.Roller chain 462 enters in the changed course passage 424 by the end of the roller path 462 of connection changed course passage 424, and in this changed course passage 424, roller chain 462 changes its moving direction.Roller chain 462 enters in the roller return passage 420 by changed course passage 424 then, and moves along the movement direction identical with slider 416.Roller chain 462 enters another changed course passage 424 then, and in this changed course passage 424, roller chain 462 changes its moving direction once more.Roller chain 462 enters into roller path 426 then.Roller chain 462 can repeat this cycling.
According to linear guide part 410, separator main body 451 is interposed between the roller 446, thereby stops directly contact mutually between the roller 446, thereby has suppressed the noise and the wearing and tearing that are produced when roller 446 rubs mutually.Further, roller 446 is interposed between the roller contact surface 454a and 454b of adjacent separator 450 of each roller 446, and is fixed by this two surface of contact.Arm 452 by separator 450 is adjusted roller 446.Therefore, each roller 446 keeps under normal conditions, and is under this state, parallel to each other by the central shaft of separator 450 rollers.When roller 446 was in the precalculated position and has predetermined pitch, roller 446 can be stabilized in and rotate in the circulation canal 428 and move.
The arm 452 of separator 450 is guided in circulation canal 428 along guide slot 438a and 438b.Thereby the fluctuation that is produced during separator 450 motion is limited, and the wave energy that is fixed on the roller 446 between the arm 452 of separator 450 is limited.Therefore, whole roller chain 462 can accurately and reposefully move in circulation canal 428.Therefore, the axial fluctuation (crooked) of roller 446 can be suppressed effectively, thereby does not have stress on rolling chain 462.
And the arm 452 of separator 450 is engaged in guide slot 438a and 438b.Be fixed on the roller 446 between the separator main body 451, also by roller contact surface 454a and 454b support and fixing.Therefore, even slider 416 is removed from guide rail 416, prevented that also roller 446 is from slider 416 disengagements.
And, being used for the lubricant reservoir 456 of kind of lubricant storage by the roller surface of contact 454a that is formed on separator 450, the through hole on the 454b forms.Because separator 450 is used for this linear guide part 410, roller 446 can roll more reposefully, has suppressed the premature wear of roller 446 and the generation of noise.
Further, separator 450 is constructed such that the outside dimensions of the open part 456a of lubricant reservoir less than arm 452.Especially, the overall dimensions of lubricant reservoir 456---comprise the height Y and the width Z of lubricant reservoir 456, and Diagonal Dimension, wherein this height Y and width Z define the internal diameter of the oblong openings 456a of lubricant reservoir 456---less than another overall dimensions, wherein this overall dimensions comprises height U and width T, and Diagonal Dimension, wherein this height U and width T define the outside dimension of arm 452.Therefore, prevented that arm 452 from fitting in the lubricant reservoir 456.For example, even separator 450 is aimed at automatically by using parts feeder or analog, can stop the entanglement (entanglement) between the separator 450.Especially, even separator 450 had been accumulated into one the case or a pile before being sent to parts feeder, separator 450 does not tangle in one case or a pile yet.Therefore, convenient automation of producing, thus a kind of separator that is used for the linear guide part is provided, this linear guide part can improve the productivity of linear guide part 410.
Be used for the separator of linear guide part and this linear guide part in conjunction with in the present invention, they are not limited to this embodiment.
For example, in the present embodiment, the lubricant reservoir 456 that extends through roller surface of contact 454b from roller surface of contact 454a is arranged on the position.But separator of the present invention is not limited in this embodiment.
For example, shown in figure 32, in another embodiment, the lubricant reservoir 456 from roller surface of contact 454a extends through roller surface of contact 454b can be arranged on (as three positions are arranged in the drawings) on a plurality of positions.
As shown in figure 33, in another embodiment, the dimple that is formed by a plurality of little indentures (representing with a plurality of points in the drawings) is integrally formed in the main contact area between roller and the separator, and wherein indenture is arranged along lubricant reservoir in the present embodiment, thereby has improved lubricity.
As long as the lubricant reservoir open part is less than the outside dimensions of arm, the description that the formation position of lubricant reservoir and shape are not limited to present embodiment is fitted in the lubricant reservoir thereby suppressed arm.For example, the roller surface of contact that is formed on the separator main body 451 is when pressing from both sides end arch door shape or taper, and the roller surface of contact touch roll period of the day from 11 p.m. to 1 a.m can produce wrapping angle arbitrarily on the roller surface of contact, and lubricant reservoir is formed on the contact segment at corresponding contact angle.Especially, as shown in figure 34, in another embodiment, lubricant reservoir can be formed on a plurality of positions in the oval-shaped groove (as being six positions in the drawings).
As shown in figure 35, in another embodiment, the little dimple shown in Figure 33 combines with structure shown in Figure 34.Thereby, can change arbitrarily embodiment within the scope of the invention.
And, in the present embodiment, for the open part 456a of lubricant reservoir 456 with prevent size relationship between its arm that enters open part 452, the size by making open part 456a can be implemented to the rectangle relation between width and the height less than the size of arm.But present embodiment is not limited thereto.
Main points of the present invention are to use Any shape, as long as this shape can prevent that separator from fitting in another separator.Especially, consider the relation between the shape, these shapes help to make arm to fit in the lubricant reservoir part, only require open part basically less than the outside dimensions of arm.Therefore, the overall dimensions of open part 456a is (if open part is rectangular, be Diagonal Dimension so) less than the overall dimensions of arm 456 (if open part is rectangular, be Diagonal Dimension so), wherein the size of this arm 456 is the sizes that are positioned at perpendicular to the cross section longitudinally of arm 456, thereby has stoped separator to assemble mutually.For example, if having annular cross section, only require the diameter of the overall dimensions of open part less than annular along the longitudinal 2 observation arm of arm.And if arm has the geometrical shape of another kind of combination, the overall dimensions of open part is less than the overall dimensions of the single partial shape of a certain shape, and this shape is obtained by this arm of projection on the direction that helps the arm assembling.
At this, phrase " open part is basically less than the outside dimensions of arm " expression: shown in Figure 36 A, arm 452 has the identical cross section part that extends longitudinally, and the end of arm 452 is formed by the free end with circular projection, in this case, even the circular distal of arm 452 fits in the lubricant reservoir 456, separator 450 also can easily be thrown off mutually.Therefore, this phrase is also represented to comprise and can not be caused the shape of blocking mutually.Reason is: if the relation shown in Figure 36 A can be set up, the mutual assembling between the separator 456 will can not produce.Shown in Figure 36 B, its expression open part is greater than an example of the outside dimensions of arm 452, and this example can be represented as and produce the example that assembles mutually between the separator.
Referring to accompanying drawing, embodiment of various details.Figure 37 is the descriptive view of expression linear guide bearing, and this linear guide bearing also is one embodiment of the invention.Figure 38 is a plotted curve, is illustrated in the relation between the wrapping angle θ and rolling element diameter Dw under the different δ values, wherein under this wrapping angle θ since the change of the separator size that causes of expanding diminish.Figure 39 is a plotted curve, is illustrated in the relation between the wrapping angle θ and δ under the different rolling element diameter Dw values, wherein under this wrapping angle θ since the size of the separator that causes of expanding diminish.Figure 40 is a descriptive view, describes the linear guide bearing according to another embodiment of the present invention.Only the difference between embodiment and the conventional linear guide member bearing shown in Figure 41 is described.
As shown in figure 37, linear guide bearing as an example in the embodiment of the invention, comprise the separator main body 531 that is interposed between adjacent column forming roll (rolling element) 506, and separator (resolution element) 530, wherein the separator 530 diaxon end face that is configured to cylinder type roller 506 is interposed between the separator 530.The arm (not shown) is integrally formed on each separator main body 531.The recessed surfaces part 531a suitable with the outer circumferential shape of cylinder type roller 506 is formed on the part of separator main body 531, wherein the external peripheral surface positioned opposite of separator main body 531 and cylinder type roller 506.
Easy mould material with high strength and own elasticity is preferably as the manufactured materials of separator 530.For example, can adopt polyamide or man made rubber.The PEEK that has low own elasticity but leak smallest number gas leakage can apply to make vacuum equipment.
And, be used for the structure of the kind of lubricant storage of cylinder type roller 506,, be formed on the surface of recessed surfaces 531a part this surface contact cylinder type roller 506 as dimple or oil hole groove.
At this, in the present embodiment, if the cross section of recessed surfaces part 531a is a folder end arch door shape, the diameter of cylinder type roller is represented with Dw, wrapping angle between the recessed surfaces 531a of separator main body 531 and the cylinder type roller 506 is represented with θ, the radius of the Gothic arch groove of recessed surfaces 531a is represented with R, the bottom portion of groove thickness of separator recessed surfaces 531a is represented with 2 δ, the radius of curvature of recessed surfaces is with " f " expression, and then the wrapping angle θ of separator satisfies equation (1) to (3):
0.5Dw·sinθtanθ＝δ+R(cosθ
0-cosθ) (1)
θ
0＝sin
-1[{(2f-1)/(2f)}sinθ] (2)
f＝R/Dw (3)
In the direct acting type device, knownly be: when separator was interposed between the rolling element, effective rolling element quantity of bearing part diminished, thereby influences bearing capacity and rigidity.
For example, with regard to bearing capacity as an example.When rolling element was roller, the ratio of bearing capacity and roller quantity was 0.75 (simultaneously, when rolling element was ball, the ratio of bearing capacity and rolling element quantity was 2/3).Compare with the direct acting type device that does not use the separator that is inserted and put, reducing of bearing capacity and rigidity is inevitable.But the decline of bearing capacity requires to be reduced to minimum.Usually, the rate of descent of bearing capacity must be controlled at and be equal to or less than 10%.Especially, the fill factor of rolling element should remain on 88% or about 88% at least.
Usually, be in each chain in the bearing part, the rolling element quantity of direct acting type device is 10 to 20.Therefore, table 1 expression guarantees the permission ability of bottom thickness 2 δ (mm) of the separator recessed surfaces part in a certain scope, and wherein fill factor remains on 88% in this scope.At this, 2 δ=[the diameter DW/ (rolling element quantity-1) of rolling element quantity * (fill factor of 1-rolling element) * rolling element].
Table 1
| The number of rolling element | 10.0 | 20.0 | |||||
| The fill factor of rolling element | 0.95 | 0.90 | 0.85 | 0.95 | 0.90 | 0.85 | |
| The diameter of rolling element (mm) | 1.0 | 0.06 | 0.11 | 0.17 | 0.05 | 0.11 | 0.16 |
| 2.0 | 0.11 | 0.22 | 0.33 | 0.11 | 0.21 | 0.32 | |
| 3.0 | 0.17 | 0.33 | 0.50 | 0.16 | 0.32 | 0.47 | |
| 4.0 | 0.22 | 0.44 | 0.67 | 0.21 | 0.42 | 0.63 | |
| 5.0 | 0.28 | 0.56 | 0.83 | 0.26 | 0.53 | 0.79 | |
| 6.0 | 0.33 | 0.67 | 1.00 | 0.32 | 0.63 | 0.95 | |
| 7.0 | 0.39 | 0.78 | 1.17 | 0.37 | 0.74 | 1.11 | |
| 8.0 | 0.44 | 0.89 | 1.33 | 0.42 | 0.84 | 1.26 | |
At this, for example, when the rolling element diameter was 2mm, the δ value changed in 0.055mm to 0.165mm scope.Figure 37 represents: as the diameter Dw of rolling element during as a horizontal axis, wrapping angle θ uses the result of calculation of formula (1) to (3) under different δ values.At this moment, because the separator dimensional changes that causes that expands is minimum.
In Figure 37, consider the scope of the δ value of setting by the diameter Dw of each rolling element, wrapping angle θ is optimum between 19 ° to 35 °, and rolling element is by load carrying capacity shown in Fig. 1 or rigidity adjustment.
When the diameter Dw of rolling element is 10mm, in table 1, surpassed 8mm, the upper limit of wrapping angle θ is near 40 °.Determine wrapping angle θ, this wrapping angle θ satisfies equation (1) to (3), can determine optimum wrapping angle θ, and under this optimum wrapping angle θ, the separator that caused by expansion 530 is crooked to be reduced to minimum.Figure 39 represents identical information, and wherein the parameter among Figure 38 changes.
As mentioned above, in the present embodiment, by under optimum wrapping angle θ, making the recessed surfaces 531a contact cylindrical roller 506 of separator 530, the dimensional changes that produces between the cylinder type roller 506, cause by the expansion of separator 530, can be reduced to minimum, this dimensional changes is inevitable for resin material.Therefore, owing to causing that the operability of direct acting type device slackens, the circulation of cylindrical roller 506 and separator 530 can be suppressed.And, under low cost, also improve low noise and endurance in addition easily.
Referring to Figure 40, the linear guide bearing in another embodiment of the present invention will be described now.As shown in figure 40, the linear guide bearing comprises the separator main body 541 that is interposed between the adjacent cylindrical roller (rolling element) 506, with separator 540, wherein separator 540 is configured to make the diaxon end face of cylindrical roller 506 to be interposed between the separator 540, and has the arm (not shown) that is integrally formed on each separator main body 541.With the suitable recessed surfaces 541a of the external peripheral surface shape of cylindrical roller 506, be formed on the part of separator main body 531, wherein the external peripheral surface positioned opposite of separator main body 531 and cylindrical roller 506.
At this, in the present embodiment, if the cross section of recessed surfaces part 541a is single circular arc, the diameter of cylindrical roller 506 is represented with Dw, wrapping angle between the recessed surfaces 541a of separator main body 541 and the cylindrical roller 506 is represented with θ, the radius of single circular groove of recessed surfaces 541a is represented with R, the bottom portion of groove thickness of separator recessed surfaces 541a is represented with 2 δ, the radius of curvature of recessed surfaces 541a is represented with " f ", the wrapping angle θ of separator 540 satisfies equation (4) to (5), wherein the contact position scope between recessed surfaces 541a and the cylinder type roller 506 be ± 10 ° or less than ± 10 °.
0.5Dw·sinθtanθ＝δ+R(1-cosθ) (4)
f＝R/Dw (5)
The contact position scope between what recessed surfaces 541a and the cylindrical roller 506 of will being described as below is ± 10 or less than ± 10 reason.When contact position was arranged on relative broad range, the distortion of resin was initially very big.But the shape of recessed surfaces 541a is single circular arc.Therefore, wide if the scope of contact position is set at, cylindrical roller 506 is easily carried out big moving, thereby causes surface friction drag to increase.Therefore, it is inappropriate being set at the scope of contact position wideer.Therefore, the scope of contact position is made as a convention amount.On the other hand, the structure of present embodiment is identical with previous embodiment with action effect.Therefore, the structure of present embodiment and the explanation of action effect are omitted at this.
The invention is not restricted to present embodiment and want to carry out in the point range various variations of the present invention easily.
For example, to have described its roller elements be a roller to each embodiment.But, even just can reach identical action effect as long as implement to make wrapping angle θ satisfy above-mentioned equation with roller when rolling element.
Adopted the example of linear guide bearing among each embodiment as linear motion device.But the present invention is not limited only to the linear guide bearing.For example, the present invention can apply in the linear motion device, as ball screw, and ball spline and linear globular lining.
As mentioned above, the invention of claim 1 has prevented to be arranged on the reducing of roller quantity of bearing area, and this quantity reduces to be owing to be created in that gap between rolling element and the separator causes.Therefore, under the situation that does not reduce bearing capacity, can suppress contact and crooked between the rolling element.
Except producing advantage of the present invention, the present invention strengthens separator main body by arm, and guarantees the rolling element end face and contact contact fully between the raceway of this rolling element end face.
According to the present invention, the position of rolling element becomes more stable, thereby has suppressed the crooked of rolling element effectively.
According to the present invention, the contact area between separator and the rolling element is limited to the left and right side of separator.Therefore, the crooked of rolling element can be suppressed, thereby improved the operability of linear guide part.
According to the present invention, oiling agent can be stored in the through hole, and the oiling agent that is stored in the through hole can be transported in the rolling element with being stabilized.
According to the present invention, a kind of linear guide part is provided, this linear guide part can improve operability when suppressing rolling element crooked.
As mentioned above, the invention provides a kind of separator that is used for the linear guide part, it can suppress bearing capacity decline and crooked effectively, and adopts simple structure just can improve operability, and a kind of device that comprises the linear guide part of this separator and comprise this linear guide part is provided.
Claims (3)
1, a kind of linear motion device comprises
One comprises the guide rail of rolling surface;
One slider comprises and the opposed rolling surface of the rolling surface of guide rail, and is guided by guide rail by a plurality of rolling elements, and rolling element is interposed between the rolling surface, so that relative movement mutually; With
One separator is interposed between the adjacent rolling element, and comprise recessed surfaces part, this recessed surfaces partly be formed on opposed described each partition part of described rolling element in,
Wherein the cross section of recessed surfaces is a single circular arc; The diameter of rolling element is with (Dw) expression, and the wrapping angle between separator and the rolling element is represented with (θ); The radius of single arc groove of recessed surfaces part is represented with (R); The bottom portion of groove thickness of the recessed surfaces part of separator is represented with (2 δ); The radius of curvature of recessed surfaces part is with (" f ") expression, and the wrapping angle of separator (θ) satisfies following equation (4) to (5):
0.5Dw·sinθtanθ＝δ+R(1-cosθ) (4)
f＝R/Dw (5)。
2, a kind of linear motion device according to claim 1, wherein the contact position between the recessed surfaces of separator part and the rolling element be in ± 10
0Scope in.
3, a kind of linear guide part that comprises the described separator of claim 1.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003032456A JP2004245233A (en) | 2003-02-10 | 2003-02-10 | Separator for linear guide |
| JP032456/03 | 2003-02-10 | ||
| JP157701/03 | 2003-06-03 | ||
| JP284433/03 | 2003-07-31 | ||
| JP292892/03 | 2003-08-13 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100085491A Division CN100427764C (en) | 2003-02-10 | 2004-02-10 | Separator linear guider therewith and linear motion device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101025196A true CN101025196A (en) | 2007-08-29 |
| CN100419286C CN100419286C (en) | 2008-09-17 |
Family
ID=33018797
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100918174A Expired - Fee Related CN100416118C (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
| CN 200710091812 Pending CN101046226A (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
| CNB2007100918189A Expired - Fee Related CN100419286C (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
| CNB2007100918117A Expired - Fee Related CN100504089C (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100918174A Expired - Fee Related CN100416118C (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
| CN 200710091812 Pending CN101046226A (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100918117A Expired - Fee Related CN100504089C (en) | 2003-02-10 | 2004-02-10 | Separator, linear guide using the separator and linear motion apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2004245233A (en) |
| CN (4) | CN100416118C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7578620B2 (en) | 2003-10-21 | 2009-08-25 | Nsk Ltd. | Linear guide device |
| JP2006220276A (en) | 2005-02-14 | 2006-08-24 | Nsk Ltd | Linear motion guide device separator and linear motion guide device |
| JP6323127B2 (en) * | 2014-04-01 | 2018-05-16 | 日本精工株式会社 | Linear motion guide device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3344131B2 (en) * | 1994-12-16 | 2002-11-11 | 日本精工株式会社 | Self-lubricating linear guide device |
| JP3971837B2 (en) * | 1998-03-04 | 2007-09-05 | 日本トムソン株式会社 | Linear motion rolling guide unit |
| JP4440366B2 (en) * | 1999-04-01 | 2010-03-24 | Ｔｈｋ株式会社 | Swivel bearing spacer |
| JP2001132745A (en) * | 1999-11-05 | 2001-05-18 | Nippon Thompson Co Ltd | Linearly moving rolling guide unit |
| JP4051845B2 (en) * | 2000-01-13 | 2008-02-27 | 日本精工株式会社 | Linear motion guide bearing device |
| JP4294199B2 (en) * | 2000-05-02 | 2009-07-08 | Ｔｈｋ株式会社 | Rolling element spacer of rolling guide device |
-
2003
- 2003-02-10 JP JP2003032456A patent/JP2004245233A/en active Pending
-
2004
- 2004-02-10 CN CNB2007100918174A patent/CN100416118C/en not_active Expired - Fee Related
- 2004-02-10 CN CN 200710091812 patent/CN101046226A/en active Pending
- 2004-02-10 CN CNB2007100918189A patent/CN100419286C/en not_active Expired - Fee Related
- 2004-02-10 CN CNB2007100918117A patent/CN100504089C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100419286C (en) | 2008-09-17 |
| CN100504089C (en) | 2009-06-24 |
| JP2004245233A (en) | 2004-09-02 |
| CN100416118C (en) | 2008-09-03 |
| CN101046226A (en) | 2007-10-03 |
| CN101025195A (en) | 2007-08-29 |
| CN101038010A (en) | 2007-09-19 |
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