CN102072248A - Four-direction equal-load linear rolling guide with high bearing capacity - Google Patents
Four-direction equal-load linear rolling guide with high bearing capacity Download PDFInfo
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- CN102072248A CN102072248A CN2010106111832A CN201010611183A CN102072248A CN 102072248 A CN102072248 A CN 102072248A CN 2010106111832 A CN2010106111832 A CN 2010106111832A CN 201010611183 A CN201010611183 A CN 201010611183A CN 102072248 A CN102072248 A CN 102072248A
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- arc
- slide block
- guide rail
- ball
- linear rolling
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Abstract
The invention provides a four-direction equal-load linear rolling guide with high bearing capacity. The four-direction equal-load linear rolling guide comprises a guide rail (1), a sliding block (2), a returning channel (23) and a roll ball (3), wherein the returning channel (23) and the roll ball (3) are arranged in the sliding block body; an arc-shaped groove is respectively reserved outside the guide rail (1) and inside the sliding block (2); the two grooves form a rollaway nest; four single-arc grooves (11) with the same radius and two dual-arc grooves (12) with the same radius are reserved outside the guide rail (1); and four single-arc grooves (21) with the same radius and two dual-arc grooves (22) with the same radius are reserved inside the sliding block (2). The four-direction equal-load linear rolling guide has the following technical effects: 1) the four-direction equal-load linear rolling guide has the advantages that a dual-arc linear rolling guide has high bearing capacity and the center distance precision of the arcs of the two grooves is easy to ensure, and overcomes the defect that friction force is increased sharply after a preload is applied; and 2) the four-direction equal-load linear rolling guide has the advantage that the friction force of the single-arc linear rolling guide is low, and overcomes the defect of low bearing capacity of the single-arc linear rolling guide.
Description
Technical field
The present invention relates to a kind of linear rolling guide, specifically, relate to the big four directions of a kind of bearing capacity to etc. the load linear rolling guide, belong to the Machining Technology field.
Background technique
Linear rolling guide is made up of guide rail, slide block, ball, back device, retainer, dust cover etc. usually.All there is the groove of garden arc shape the outside of guide rail and the inboard of slide block, and they have formed raceway altogether, have filled ball in the raceway.Also have the back passage in the slide body, the two ends of slide block are equipped with the back device, and the back groove that connects raceway and back passage is arranged on the back device.When the relative guide rail moving linearly of slide block, ball front end from slide block in raceway is rolled to the rear end, the back device of slide block rear end has blocked ball, and force ball to leave raceway, by back groove on the back device and the back passage in the slide body, arrive the back device of slip front, pass through the back groove on it again, get back in the raceway of slip front, realized circulating rolling, made between guide rail and the slide block and formed rolling friction that the load that is added in simultaneously on the slide block is delivered on the guide rail through ball, therefore, the ball quantity in raceway has a significant impact the bearing capacity of linear rolling guide.
The linear rolling guide of different product, the raceway form may be different, and the raceway form mainly contains following several:
1, single arc raceway form of quarter turn: referring to Fig. 2, respectively there is the groove (11) and (21) of the quarter turn that four radiuses equate the outside of guide rail (1) and the inboard of slide block (2), they have formed four single arc raceways altogether.Because the corresponding central angle in the groove (11) of each quarter turn or (21) has only 90 degree, the standard length bar of causing is difficult for putting surely, checks the centre distance precision of two groove garden arcs to cannot say for sure to demonstrate,prove.The center of circle of the single garden of upper and lower groove (11) arc in (1) outside of Fig. 2 middle guide is respectively at A and B, A and B are Zd in the distance of short transverse, the center of circle of the single garden of upper and lower groove (21) arc of (2) inboards of slide block is respectively at C and D, C and D are Zk in the distance of short transverse, and Zd is not equal to Zk.The radius of ball (3) is slightly less than the radius of groove (11) and (21) quarter turn, so ball (3) contacts on one point with the garden arc of the above-mentioned groove of guide rail (11) and (21) respectively, and the line of these two point of contact is on the loading line.Zd subtracts the difference of Zk and can just also can bear, but should guarantee that the loading line is from the horizontal by 45 degree.This raceway form is divided again:
(1) DF type: this moment Zd＞Zk, the intersection point of the loading line of two raceways is seen Fig. 2 in guide rail, this form frictional force is little, the automatic adjustment capability that absorbs alignment error is stronger, but stiffness in torsion is lower.
(2) DB type: this moment Zd＜Zk, the intersection point of the loading line of two raceways is seen Fig. 3 outside guide rail, this form frictional force is little, stiffness in torsion is higher, but the automatic adjustment capability that absorbs alignment error a little less than.
2, single arc raceway form of 1/2 circumference: referring to Fig. 4, this raceway form except the groove (21) of the groove (11) of guide rail (1) and slide block (2) all make into the same radius circumference 1/2, other design parameter is identical with single arc form design parameter of quarter turn.Because because groove (11) central angle corresponding with groove (21) of each 1/2 circumference has 180 degree, the standard length bar is put surely easily, this just overcome the centre distance precision of checking two groove garden arcs cannot say for sure to demonstrate,prove shortcoming, but when having brought precision grinding groove garden arc, the shortcoming that emery wheel and workpiece area of contact strengthen.Single arc form with quarter turn is the same, and the ball of this raceway form (3) is at 2 with raceway and contacts, and the loading line is from the horizontal by 45 degree, subtracts difference positive and negative of Zk according to Zd, and the branch of DF type and DB type is also arranged, and Fig. 4 is the DF type.
3, Gothic formula raceway: referring to Fig. 5, guide rail (1) outside and the inboard groove (12) and (22) that four Gothic shapes are respectively arranged of slide block (2), they have formed four duplex circular ares profile races altogether.Above-mentioned each two arc groove (12) or (22) are by two quarter turn compositions that wait radius, the radius of quarter turn is slightly larger than the radius of ball (3), there is a distance in the center of circle of two quarter turns of above-mentioned each two arc groove (12) or (22) on short transverse, this is apart from having guaranteed that two quarter turns of above-mentioned each two arc groove (12) with (22) respectively have a point of contact at 45 degree places and ball (3), to be ball (3) be at 2 with two arc grooves (12) or (22) contacts, and is at 4 with duplex circular ares profile race and contacts.This makes above-mentioned each (12) or (22) groove can both clamp the standard length bar, checks the precision of two groove centre distance to be guaranteed, and spends from the horizontal by 45 by the loading line of two point of contact.Because ball (3) is at 4 with duplex circular ares profile race and contacts that bearing capacity is bigger than the bearing capacity of the two kinds of single arc form in front, but after applying preload, frictional force sharply increases.
The raceway form be quarter turn DF type single circular arc four directions to etc. the load linear rolling guide, the carrying situation is seen Fig. 6, the arrow of solid line represents to act on the load on the ball (3) among the figure, under the loading of a direction, two solid arrows are arranged, and this expression has only ball (3) bearing load in two row's raceways.The carrying situation of other single circular arc linear rolling guides is similarly just no longer figured.
The raceway form be two circular arcs the four directions to etc. the load linear rolling guide, the carrying situation is seen Fig. 7, under the loading of a direction, four solid arrows are arranged, this expression has ball (3) bearing load in four row's raceways, compare many two solid arrows with Fig. 6, the bearing capacity of the two circular arc linear rolling guides in this explanatory drawing 7 is bigger than the bearing capacity of single circular arc linear rolling guide among Fig. 6.
By Fig. 6, Fig. 7 as seen, the structural type of above-mentioned every kind of linear rolling guide can both guarantee vertically upward, vertically downward, level to the right, level is left on the four direction, when having only the loading of a direction respectively, the ball quantity of the bearing load of each direction equates, this also is that above-mentioned several linear rolling guide is named as the reason in " four directions to etc. load ".Existing four directions to etc. load linear rolling guide product all are four raceways.Under the ball diameter same case, two circular arcs four directions to etc. load linear rolling guide and single circular arc four directions to etc. the load linear rolling guide relatively, preceding a kind of bearing capacity is big, but after applying preload, preceding a kind of frictional force sharply increases, being forward and backward two kinds respectively has excellent, shortcoming, all requires further improvement.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art part, provide a kind of bearing capacity is big, frictional force is little, the raceway precision is high four directions to etc. the load linear rolling guide.
The big four directions of bearing capacity of the present invention to etc. the load linear rolling guide, comprise guide rail (1), slide block (2), be located at the back passage (23) in the slide body, ball (3), be installed in back device (4) and (42) at slide block two ends, retainer (51), (52) reach (53), dustproof end cap (61) and end diaphragm seal (62), guide rail (1) outside is respectively equipped with arc-shaped groove with slide block (2) inboard, two kinds of grooves are formed raceway, back device (4), the back groove that connects back passage (23) and raceway is arranged (42), single arc groove (11) and two two arc grooves (12) that radius equates that said guide rail (1) outside has four radiuses to equate, single arc groove (21) and two two arc grooves (22) that radius equates that slide block (2) inboard has four radiuses to equate, inboard four the single arc grooves (21) of four single arc grooves (11) in guide rail (1) outside and slide block (2) form four single arc raceways, two two arc grooves (12) in guide rail (1) outside and inboard two duplex circular ares profile races of two pairs of arc grooves (22) formation of slide block (2).
Preferably,
Each single arc groove (11) of said guide rail (1) outside and slide block (2) inboard, the radius of (21) equate, the radius of arc of each single arc groove (11), (21) is slightly larger than the radius of ball (3), ball has only any to contact respectively with each single arc groove (11) in guide rail (1) outside, each single arc groove (12) of slide block (2) inboard, and the line of two point of contact is from the horizontal by 45 degree.
The radius of the two arc grooves (12) of each of said guide rail (1) outside and slide block (2) inboard, (22) equates, each two arc groove (12), (22) all by radiuses such as two quarter turn form, the radius of arc of each two arc groove (12), (22) is slightly larger than the radius of ball (3), ball has contact respectively at 2 with each two arc groove (12) in guide rail (1) outside, each two arc groove (22) of slide block (2) inboard, and the line of two point of contact is from the horizontal by 45 degree.
Between said four single arc raceways and the ball (3) is interference fit; Making said two duplex circular ares profile races is that the zero clearance cooperates with ball (3).
The big four directions of bearing capacity of the present invention to etc. the load linear rolling guide, have following technique effect:
1) it is big to have a bearing capacity of two circular arc linear rolling guides, and the advantage of checking the centre distance precision of two groove garden arcs easily to guarantee has overcome it again after applying preload, the shortcoming that frictional force sharply increases;
2) also had the little advantage of single circular arc rolling linear guide friction force, overcome the less shortcoming of its bearing capacity again.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is single arc raceway form of quarter turn, DF type schematic representation;
Fig. 3 is single arc raceway form of quarter turn, DB type schematic representation;
Fig. 4 is single arc raceway form of 1/2 circumference, DF type schematic representation;
Fig. 5 is a Gothic formula raceway schematic representation;
Fig. 6 a, Fig. 6 b, Fig. 6 c and Fig. 6 d be single circular arc four directions to etc. load linear rolling guide carrying situation schematic representation;
Fig. 7 a, Fig. 7 b, Fig. 7 c and Fig. 7 d be two circular arc four directions to etc. load linear rolling guide carrying situation schematic representation;
Fig. 8 a, Fig. 8 b, Fig. 8 c, Fig. 8 d are linear rolling guide carrying situation schematic representation of the present invention;
Fig. 9 is a linear rolling guide cross section view of the present invention;
Figure 10 is the K-K revolved sectional view of Fig. 9.
Embodiment
As Fig. 1, Fig. 9, shown in Figure 10, the big four directions of bearing capacity of the present invention to etc. the load linear rolling guide, comprise guide rail (1), slide block (2), be located at the back passage (23) in the slide body, ball (3), be installed in back device (4) and (42) at slide block two ends, retainer (51), (52) reach (53), dustproof end cap (61) and end diaphragm seal (62), guide rail (1) outside is respectively equipped with arc-shaped groove with slide block (2) inboard, two kinds of grooves are formed raceway, back device (4), the back groove that connects back passage (23) and raceway is arranged (42), single arc groove (11) and two two arc grooves (12) that radius equates that said guide rail (1) outside has four radiuses to equate, single arc groove (21) and two two arc grooves (22) that radius equates that slide block (2) inboard has four radiuses to equate, inboard four the single arc grooves (21) of four single arc grooves (11) in guide rail (1) outside and slide block (2) form four single arc raceways, two two arc grooves (12) in guide rail (1) outside and inboard two duplex circular ares profile races of two pairs of arc grooves (22) formation of slide block (2).Single arc groove (11) of guide rail (1) outside and slide block (2) inboard, the radius of (21) equate.The radius of the inboard two arc grooves (12) of guide rail (1) outside and slide block (2), (22) is also equal, each pair arc grooves (12), (22) all by radiuses such as two quarter turn form.
The center of circle of upper and lower single arc groove (11) in guide rail (1) the one end outside is respectively at A and B, A and B are Zd in the distance of short transverse, the center of circle of upper and lower single arc groove (21) of slide block one end inboard is respectively at C and D, and C and D are Zk in the distance of short transverse, and Zd is not equal to Zk.The radius of arc of each single arc groove (11), (21) is slightly larger than the radius of ball (3), so ball (3) has only with the circular arc of each single arc groove (11), (21) respectively and a bit contact, and the line of these two point of contact is on the loading line.The difference that Zd subtracts Zk is just (Zd is greater than Zk among Fig. 1), and is negative, but should guarantee that the loading line is from the horizontal by 45 degree.
At two single arc grooves (11), (21) in the middle of the height distance in the center of circle, be two arc grooves (12) that two inboard radiuses of guide rail (1) outside and slide block (2) equate, (22), they have formed two two circular arc arc raceways altogether, each two arc groove (12), (22) all by two wait radiuses quarter turn form, the radius of quarter turn is slightly larger than the radius of ball (3), form each two arc groove (12), (22) there is a distance in the center of circle of two quarter turns on short transverse, to guarantee above-mentioned each two arc groove (12), (22) two quarter turns all contact with ball (3) at 45 degree places, to be ball (3) be at 2 with two arc grooves (12) or (22) contacts, being at 4 with duplex circular ares profile race contacts, the standard length bar can be clamped in above-mentioned each two arc groove (12) or (22), check the precision of two groove centre distance to be guaranteed, and spend from the horizontal by 45 by the loading line of two point of contact.
Suitably select the size of ball (3), making between four single arc raceways and the ball (3) is interference fit, applies preload; Between two duplex circular ares profile races and ball (3) is that the zero clearance cooperates, and does not apply preload, ball (3) so just can not occur and be at 4 with raceway and contact that frictional force is the situation of increase sharply.
As shown in Figure 8, when load was added on the linear rolling guide, ball in the duplex circular ares profile race (3) was the same with ball (3) in single arc raceway, bearing load on the direction that becomes 45 degree with level.This structural type guaranteed vertically upward, vertically downward, level to the right, level is left on the four direction, when having only the loading of a direction respectively, four solid arrows are all arranged, and this expression all has ball (3) bearing load in four row's raceways, and all directions bearing capacity equates, compare with Fig. 6, Fig. 7, the ball of bearing load (3) increases by two rows.
As shown in figure 10, when slide block (2) relatively during guide rail (1) moving linearly, back device (4) and (42) force ball (3) by back groove (41) on the back device and back passage (23) back in the slide body, realized the circulating rolling of ball (3) on raceway, made between slide block (2) and the guide rail (1) and form rolling friction.The load that acts on simultaneously on the slide block (2) is delivered on the guide rail (1) through ball (3).Retainer (51), (52), (53) are installed on the slide block (2), to guarantee that slide block (2) is from guide rail (1) when taking off, ball (3) can not fall down from slide block (2), slide block (2) two ends also are equipped with dustproof end cap (61), end diaphragm seal (61) and lubricant oil and chew (not drawing), and they play the seal lubrication effect.
Claims (4)
- The four directions that a bearing capacity is big to etc. the load linear rolling guide, comprise guide rail (1), slide block (2), be located at the back passage (23) in the slide body, ball (3), be installed in back device (4) and (42) at slide block two ends, retainer (51), (52) reach (53), dustproof end cap (61) and end diaphragm seal (62), guide rail (1) outside is respectively equipped with arc-shaped groove with slide block (2) inboard, two kinds of grooves are formed raceway, back device (4), the back groove that connects back passage (23) and raceway is arranged (42), it is characterized in that, single arc groove (11) and two two arc grooves (12) that radius equates that said guide rail (1) outside has four radiuses to equate, single arc groove (21) and two two arc grooves (22) that radius equates that slide block (2) inboard has four radiuses to equate, inboard four the single arc grooves (21) of four single arc grooves (11) in guide rail (1) outside and slide block (2) form four single arc raceways, two two arc grooves (12) in guide rail (1) outside and inboard two duplex circular ares profile races of two pairs of arc grooves (22) formation of slide block (2).
- 2. the big four directions of bearing capacity according to claim 1 to etc. the load linear rolling guide, it is characterized in that, each single arc groove (11) of said guide rail (1) outside and slide block (2) inboard, the radius of (21) equate, the radius of arc of each single arc groove (11), (21) is slightly larger than the radius of ball (3), ball has only any to contact respectively with each single arc groove (11) in guide rail (1) outside, each single arc groove (12) of slide block (2) inboard, and the line of two point of contact is from the horizontal by 45 degree.
- 3. the big four directions of bearing capacity according to claim 1 to etc. the load linear rolling guide, it is characterized in that, each two arc groove (12) that said guide rail (1) outside and slide block (2) are inboard, (22) radius equates, each two arc groove (12), (22) all by two wait radiuses quarter turn form, each two arc groove (12), (22) radius of arc is slightly larger than the radius of ball (3), the two arc grooves (12) of each of ball and guide rail (1) outside, each inboard two arc groove (22) of slide block (2) have 2 contacts respectively, and the line of two point of contact is from the horizontal by 45 degree.
- 4. the big four directions of bearing capacity according to claim 1 to etc. the load linear rolling guide, it is characterized in that, be interference fit between said four single arc raceways and the ball (3); Making said two duplex circular ares profile races is that the zero clearance cooperates with ball (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106111832A CN102072248A (en) | 2010-12-29 | 2010-12-29 | Four-direction equal-load linear rolling guide with high bearing capacity |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010106111832A CN102072248A (en) | 2010-12-29 | 2010-12-29 | Four-direction equal-load linear rolling guide with high bearing capacity |
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| CN102072248A true CN102072248A (en) | 2011-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010106111832A Pending CN102072248A (en) | 2010-12-29 | 2010-12-29 | Four-direction equal-load linear rolling guide with high bearing capacity |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041868A (en) * | 2015-06-25 | 2015-11-11 | 嘉兴建鑫型钢冷拔有限公司 | Linear guide rail pair and machining technology thereof |
| CN107191480A (en) * | 2017-07-12 | 2017-09-22 | 江门市天功自动化科技有限公司 | A kind of straight line module |
-
2010
- 2010-12-29 CN CN2010106111832A patent/CN102072248A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041868A (en) * | 2015-06-25 | 2015-11-11 | 嘉兴建鑫型钢冷拔有限公司 | Linear guide rail pair and machining technology thereof |
| CN107191480A (en) * | 2017-07-12 | 2017-09-22 | 江门市天功自动化科技有限公司 | A kind of straight line module |
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Application publication date: 20110525 |