CN102628500A - Planet roller screw mechanism capable of eliminating axial gaps - Google Patents
Planet roller screw mechanism capable of eliminating axial gaps Download PDFInfo
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- CN102628500A CN102628500A CN2012101182366A CN201210118236A CN102628500A CN 102628500 A CN102628500 A CN 102628500A CN 2012101182366 A CN2012101182366 A CN 2012101182366A CN 201210118236 A CN201210118236 A CN 201210118236A CN 102628500 A CN102628500 A CN 102628500A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
- F16H25/2247—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members with rollers
- F16H25/2252—Planetary rollers between nut and screw
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Abstract
The invention discloses a planet roller screw mechanism capable of eliminating axial gaps, belonging to liner actuation mechanisms. The mechanism divides a screw into a segment of long axial screw and a segment of hollow screw, wherein the segment of long axial screw is installed into the hollow screw. An axial gap adjusting assembly is used to clamp screw threads of the two screw segments and screw threads of a roller, and a shrink disc is adopted at the end portion to compact the screw threads of the two screw segments and screw threads of a roller radially, thereby eliminating the problem of axial gaps between the screw and the roller. The mechanism would not change center distances and bearing capability and is convenient for roller installation. The mechanism can also carry out axial gap adjustments through a center bolt of a shaft end and a spring when the threads are worn after long-term work. The mechanism solves idling and skidding problems caused by axial gaps, effectively increases transmission precision and total transmission efficiency, decreases engaging impacts of threads and noises, and ensures bearing capability. In addition, the method of eliminating axial gaps provided in the invention can be further used in other linear actuation mechanisms such as roller screws and the like.
Description
Affiliated field
The invention belongs to a kind of straight line actuation mechanism, be specifically related to a kind of planetary roller screw mechanism of eliminating axial clearance.
Existing technology
The straight line actuation mechanism be a kind of can be with the mechanical device that rotatablely moves and transform each other with straight line motion.Existing straight line actuation mechanism commonly used mainly contains two kinds, and a kind of is ball screw, and a kind of is the planetary roller leading screw.The latter mainly is made up of leading screw, roller and nut; Owing to adopted screwed roller to replace ball as the power transmission unit; Compare with ball screw; Its power transmission unit has bigger contact radius and more point of contact, therefore all is superior to ball screw at aspects such as positional accuracy, load rating, rigidity, speed, life-spans.
But the subject matter that the planetary roller leading screw exists is slipping, and this is that thread engagement exists axial clearance to cause, and can influence transmission accuracy, increase wearing and tearing, especially high speed to-and-fro motion meeting increase mesh impact.The main method that addresses this problem at present is to adopt double nut, connects through two nut axial pretightenings, eliminates axial clearance, but this method only needs except the axial clearance between roller and nut, and the axial clearance between leading screw and roller still exists.Document " Elastic Elements in Roller-Screw Mechanisms " has proposed a kind of method of eliminating leading screw and roller axial clearance; Promptly adopt a kind of annular spring, be installed on the nut, compress leading screw, roller and nut through radial force; The resilient separation device is installed on the roller spindle nose simultaneously; Under the acting in conjunction of annular spring and separator, reach the purpose of eliminating axial clearance, but this method active force is radially; Can cause leading screw and roller off-design engaging position, change centre distance, reduce bearing capacity.
Summary of the invention
The objective of the invention is: because the effective ways that existing planetary roller screw mechanism is eliminated axial clearance have only a kind of form of double nut; The present invention is directed to the problem of eliminating axial gap between leading screw and roller; Designed a kind of planetary roller screw mechanism of eliminating leading screw and roller axial clearance, improved transmission accuracy to reach, reduce the purpose that thread engagement is impacted, reduced vibration noise.This mechanism is applicable to short stroke, high thrust, the linear servo occasion high to positional accuracy, vibratory impulse and noise requirements.
Technological scheme of the present invention is:
A kind of planetary roller screw mechanism of eliminating axial clearance comprises planetary roller lead screw pair transmitting assemblies, supporting component and axial gap adjusting component; Said supporting component is supported on planetary roller lead screw pair transmitting assemblies on the pedestal; Said axial gap adjusting component is eliminated the axial clearance of said planetary roller lead screw pair transmitting assemblies;
Planetary roller lead screw pair transmitting assemblies mainly comprises major axis leading screw 1, hollow leading screw 23 and roller 6; There is a step to form big end and small end on the said major axis leading screw 1; Said hollow leading screw 23 is enclosed within major axis leading screw 1 small end outer wall, and the step through major axis leading screw 1 only leans on; Hollow leading screw 23 is equipped with through shrinking the contraction pressure ring I 20 and contraction pressure ring II 21 that pressure ring connecting bolt 22 connects away from an end outer wall of major axis leading screw 1, and the outer skew wall that shrinks pressure ring I 20 matches with the interior skew wall that shrinks pressure ring II21; When contraction pressure ring connecting bolt 22 turns; The outer skew wall that shrinks pressure ring I 20 produces interaction force with the interior skew wall that shrinks pressure ring II 21; So that hollow leading screw 23 radial compaction major axis leading screws 1 outer wall, thereby realize that major axis leading screw 1 transmitting torque drives the rotation in the same way synchronously of hollow leading screw 23;
Plurality of rollers 6 is installed on the left planet carrier 7 and right planet carrier 15 at its two ends, is engaged on the outer wall of major axis leading screw 1 and hollow leading screw 23 abutting ends simultaneously circumference uniform distribution; Bearing screwed cap 10 and 12 outsides that are engaged on plurality of rollers 6 of pre-load nut form the planetary roller screw structure; The axial clearance between roller 6 and bearing screwed cap 10, roller 6 and the pre-load nut 12 producing the pretightening force of opposite direction between the two, thereby is eliminated in flexible unit 11 between bearing screwed cap 10 and the pre-load nut 12;
In order to guarantee the normal engaged between major axis leading screw 1 and roller 6, hollow leading screw 23 and the roller 6; Roller 6 two end portions screw threads are cut into straight-tooth; Straight-tooth through these two ends respectively with the engagement of left side ring gear 9 and right side ring gear 13; The axis of assurance roller 6 and major axis leading screw 1, hollow leading screw 23 keeping parallelisms, thus the screw thread normal engaged guaranteed; Said left side ring gear 9 is respectively charged into bearing screwed cap 10 and pre-load nut 12 inboards with right side ring gear 13 through interference fit; Left side shaft end ring 8 is accomplished the axially locating effect of left side ring gear 9 and right side ring gear 13 respectively and is prevented coming off of left planet carrier 7 and right planet carrier 15 with right side shaft end ring 14;
Said axial gap adjusting component is installed in the end of hollow leading screw 23 away from major axis leading screw 1, to eliminate the axial clearance between roller 6 and major axis leading screw 1, roller 6 and the hollow leading screw 23; Axial gap adjusting component comprises gap adjustment pad I 26, gap adjustment pad II28, spring 25, centre bolt 27, holding down bolt 29 and stop ring 24; Holding down bolt 29 links together the gap adjustment pad I 26 at spring 25 two ends with gap adjustment pad II28, under the effect of spring 25, initial distance obtains adjustment between gap adjustment pad I 26 and the gap adjustment pad II28; Some spring 25 circle distribution, the one of which end is adjusted the end that pad I 26 withstands major axis leading screw 1 through the gap, and the other end withstands the hollow leading screw 23 terminal inwardly circumferentias of emersion through gap adjustment pad II28, stop ring 24 respectively; Centre bolt 27 passes gap adjustment pad I 26, gap adjustment pad II28 and major axis leading screw 1 successively, above-mentioned axial gap adjusting component is fixed on the major axis leading screw 1, and can be through the decrement of centre bolt 27 Regulation springs 25; Consult Fig. 2; Because the active force of spring 25; Make roller 6 and major axis leading screw 1, the axial clearance of removing between roller 6 and the hollow leading screw 23 eliminate; Screw thread right side curved surface and the roller 6 screw threads left side curved surface of realizing major axis leading screw 1 do not have the gap engagement, make the screw thread left side curved surface of hollow leading screw 23 and roller 6 screw thread right side curved surfaces not have the gap engagement;
Said supporting component two groups of identical left sides supporting component and right side supporting component, left side supporting component and right side supporting component are installed in major axis leading screw 1 and hollow leading screw 23 opposite ends respectively; Said left side supporting component comprises that axially being installed in major axis leading screw 1 successively holds the left side bearing sleeve 4 of outer wall, left-hand axis to roller bearing 3 and left side end ring 2 greatly; Left side bearing sleeve 4 provides the loading of left side double-row conical bearing 5 and only leans against on the step of major axis leading screw 1 outer wall, and left side seal ring 30 makes and seals between left side end ring 2 and the major axis leading screw 1 big end outer wall; Have the left side bolt hole 31 that is connected with pedestal on the end ring 2 of left side; The right side supporting component accordingly also by right side double-row conical bearing 16, right side bearing sleeve 17, right-hand axis to roller bearing 18, right side end ring 19, right side seal ring 33 and right side bolt hole 32.
During work, being right-handed thread with major axis leading screw 1, hollow leading screw 23 and roller 6 is example, and major axis leading screw 1 is a live axle; When major axis leading screw 1 is rotated in the forward, when promptly turning clockwise, drive the rotation in the same way synchronously of hollow leading screw 23; Roller 6 is at forward; Promptly clockwise reverse around self axis revolution the time, promptly be rotated counterclockwise, major axis leading screw 1 screw thread right side curved surface did not have the gap with roller 6 screw threads left side curved surface and meshed this moment; Roller 6 screw thread right side curved surfaces do not have gap engagement with bearing screwed cap 10 screw thread right side curved surfaces and promote bearing screwed cap 10 and pre-load nut 12 and move right along axis, do not participate in engagement with the match screw thread of part of hollow leading screw 23 on the roller 6.When 1 counterrotating of major axis leading screw; When promptly being rotated counterclockwise, drive the rotation in the same way synchronously of hollow leading screw 23, roller 6 is oppositely; Promptly counterclockwise revolution the time around self axis forward; Promptly turn clockwise, curved surface and roller 6 screw thread right side curved surfaces engagements on the left of the screw thread of hollow leading screw 23, roller 6 screw threads left side curved surface does not have gap engagement and promotion bearing screwed cap 10 and pre-load nut 12 vertically to left movement with hollow leading screw 23 left side curved surfaces; At this moment, on the roller 6 with major axis leading screw 1 match the part screw thread do not participate in the engagement.
Behind planetary roller screw mechanism work certain hour; Because wearing and tearing need to be regulated the axial clearance of hollow leading screw 23 and 6 of rollers to keep no gap engagement driving, unclamp contraction pressure ring connecting bolt 22 at this moment, the radial compaction power that releasing major axis leading screw 1 and hollow leading screw are 23; Regulate centre bolt 27; Make spring 25 compress, finely tune hollow leading screw 23 vertically and make itself and major axis leading screw 1 compress roller 6 screw threads once more; The gap of adjustment is bigger if desired; And the decrement of existing spring 25 is not enough, adjusts holding down bolt 29 again, increases the initial distance of gap adjustment pad I 26 and gap adjustment pad II 28; Thereby increase the decrement of spring 25, be convenient to regulate wider gap through centre bolt 27.To shrink pressure ring connecting bolt 22 at last again and tighten, again major axis leading screw 1 and hollow leading screw 23 compressed with contraction pressure ring II 21 through shrinking pressure ring I 20.
The invention has the beneficial effects as follows: the planetary roller screw mechanism that the present invention proposes is divided into two sections with leading screw; One section is the major axis leading screw, and one section is hollow leading screw, during installation with pack into hollow leading screw and adopt shrink disk radially major axis leading screw and hollow leading screw to be compressed of major axis leading screw in the end; Two sections threads of lead screw clamp the roller screw thread; Thereby solved the problem of eliminating leading screw and roller axial clearance, this mechanism can not change centre distance and change bearing capacity, and is convenient to the roller installation.This mechanism also can carry out the axial clearance adjustment through axle head centre bolt and spring, so that screw thread carries out the axial clearance adjustment after wearing and tearing through long-term work once more.The axial clearance between leading screw and roller has been eliminated by this mechanism, has solved because the slipping problem that axial clearance causes effectively raises transmission accuracy, reduces the thread engagement impact, guarantees bearing capacity, reduced noise, improves whole transmission efficiency.In addition, the mechanism of elimination axial clearance according to the invention also can be used for other straight line actuation mechanism, for example ball screw etc.
Description of drawings
Fig. 1: the planetary roller screw mechanism sectional view of the axial clearance eliminated that the present invention proposes;
Fig. 2: major axis leading screw and hollow leading screw respectively with roller engaging position enlarged view;
Wherein: 1-major axis leading screw, 2-left side end ring, the 3-left-hand axis is to roller bearing, 4-left side bearing sleeve, 5-left side double-row conical bearing, 6-roller; 7-left side planet carrier, 8-left side shaft end ring, 9-left side ring gear, 10-bearing screwed cap, 11-Flexible element, 12-pre-load nut; 13-right side ring gear, 14-right side shaft end ring, 15-right side planet carrier, 16-right side double-row conical bearing, 17-right side bearing sleeve, the 18-right-hand axis is to roller bearing; 19-right side end ring, 20-shrinks pressure ring I, and 21-shrinks pressure ring II, and 22-shrinks pressure ring connecting bolt, the hollow leading screw of 23-; The 24-stop ring, 25-spring, 26-gap adjustment pad I, 27-centre bolt, 28-gap adjustment pad II; The 29-holding down bolt, 30-left side seal ring, 31-left side bolt hole, 32-right side bolt hole, 33-right side seal ring.
Embodiment:
The planetary roller screw mechanism of the axial clearance eliminated in the present embodiment comprises planetary roller lead screw pair transmitting assemblies, supporting component and axial gap adjusting component; Said supporting component is supported on planetary roller lead screw pair transmitting assemblies on the pedestal; Said axial gap adjusting component is eliminated the axial clearance of said planetary roller lead screw pair transmitting assemblies;
Planetary roller lead screw pair transmitting assemblies mainly comprises major axis leading screw 1, hollow leading screw 23 and roller 6; There is a step to form big end and small end on the said major axis leading screw 1; Said hollow leading screw 23 is enclosed within major axis leading screw 1 small end outer wall, and the step through major axis leading screw 1 only leans on; Hollow leading screw 23 is equipped with through shrinking the contraction pressure ring I 220 and contraction pressure ring II 21 that pressure ring connecting bolt 22 connects away from an end outer wall of major axis leading screw 1, and the outer skew wall that shrinks pressure ring I 20 matches with the interior skew wall that shrinks pressure ring II21; When contraction pressure ring connecting bolt 22 turns; The outer skew wall that shrinks pressure ring I 20 produces interaction force with the interior skew wall that shrinks pressure ring II 21; So that hollow leading screw 23 radial compaction major axis leading screws 1 outer wall, thereby realize that major axis leading screw 1 transmitting torque drives the rotation in the same way synchronously of hollow leading screw 23;
10 rollers 6 are installed on the left planet carrier 7 and right planet carrier 15 at its two ends, are engaged on the outer wall of major axis leading screw 1 and hollow leading screw 23 abutting ends simultaneously circumference uniform distribution; Bearing screwed cap 10 and 12 outsides that are engaged on plurality of rollers 6 of pre-load nut form the planetary roller screw structure; The axial clearance between roller 6 and bearing screwed cap 10, roller 6 and the pre-load nut 12 producing the pretightening force of opposite direction between the two, thereby is eliminated in flexible unit 11 between bearing screwed cap 10 and the pre-load nut 12; Flexible element 11 in the present embodiment is a compression spring.
In order to guarantee the normal engaged between major axis leading screw 1 and roller 6, hollow leading screw 23 and the roller 6; Roller 6 two end portions screw threads are cut into straight-tooth; Straight-tooth through these two ends respectively with the engagement of left side ring gear 9 and right side ring gear 13; The axis of assurance roller 6 and major axis leading screw 1, hollow leading screw 23 keeping parallelisms, thus the screw thread normal engaged guaranteed; Said left side ring gear 9 is respectively charged into bearing screwed cap 10 and pre-load nut 12 inboards with right side ring gear 13 through interference fit; Left side shaft end ring 8 is accomplished the axially locating effect of left side ring gear 9 and right side ring gear 13 respectively and is prevented coming off of left planet carrier 7 and right planet carrier 15 with right side shaft end ring 14;
Said axial gap adjusting component is installed in the end of hollow leading screw 23 away from major axis leading screw 1, to eliminate the axial clearance between roller 6 and major axis leading screw 1, roller 6 and the hollow leading screw 23; Axial gap adjusting component comprises gap adjustment pad I 26, gap adjustment pad II28, spring 25, centre bolt 27, holding down bolt 29 and stop ring 24; Four groups of holding down bolts 29 are adjusted pad I 26 with the gap at spring 25 two ends and are linked together with gap adjustment pad II28, and under the effect of spring 25, initial distance obtains adjusting between gap adjustment pad I 26 and the gap adjustment pad II28; Four groups of springs 25 are circle distribution, and the one of which end is adjusted the end that pad I 26 withstands major axis leading screw 1 through the gap, and the other end withstands the hollow leading screw 23 terminal inwardly circumferentias of emersion through gap adjustment pad II 28, stop ring 24 respectively; Centre bolt 27 passes gap adjustment pad I 26, gap adjustment pad II28 and major axis leading screw 1 successively, above-mentioned axial gap adjusting component is fixed on the major axis leading screw 1, and can be through the decrement of centre bolt 27 Regulation springs 25; Consult Fig. 2; Because the active force of spring 25; Make roller 6 and major axis leading screw 1, the axial clearance of removing between roller 6 and the hollow leading screw 23 eliminate; Screw thread right side curved surface and the roller 6 screw threads left side curved surface of realizing major axis leading screw 1 do not have the gap engagement, make the screw thread left side curved surface of hollow leading screw 23 and roller 6 screw thread right side curved surfaces not have the gap engagement;
Said supporting component two groups of identical left sides supporting component and right side supporting component, left side supporting component and right side supporting component are installed in major axis leading screw 1 and hollow leading screw 23 opposite ends respectively; Said left side supporting component comprises that axially being installed in major axis leading screw 1 successively holds the left side bearing sleeve 4 of outer wall, left-hand axis to roller bearing 3 and left side end ring 2 greatly; Left side bearing sleeve 4 provides the loading of left side double-row conical bearing 5 and only leans against on the step of major axis leading screw 1 outer wall, and left side seal ring 30 makes and seals between left side end ring 2 and the major axis leading screw 1 big end outer wall; Have the left side bolt hole 31 that is connected with pedestal on the end ring 2 of left side; The right side supporting component accordingly also by right side double-row conical bearing 16, right side bearing sleeve 17, right-hand axis to roller bearing 18, right side end ring 19, right side seal ring 33 and right side bolt hole 32.
In the present embodiment, major axis leading screw 1, hollow leading screw 23 and roller 6 are right-handed thread;
When the planetary roller screw mechanism of the axial clearance eliminated in the present embodiment was worked, major axis leading screw 1 was a live axle, when major axis leading screw 1 is rotated in the forward; When promptly turning clockwise; Drive the rotation in the same way synchronously of hollow leading screw 23, roller 6 is at forward, and is promptly reverse around self axis revolution the time clockwise; Promptly be rotated counterclockwise; This moment, major axis leading screw 1 screw thread right side curved surface did not have the gap engagement with roller 6 screw threads left side curved surface, and roller 6 screw thread right side curved surfaces do not have the gap engagement with bearing screwed cap 10 screw thread right side curved surfaces and promote bearing screwed cap 10 and pre-load nut 12 and move right along axis, did not participate in meshing with the match screw thread of part of hollow leading screw 23 on the roller 6.When 1 counterrotating of major axis leading screw; When promptly being rotated counterclockwise, drive the rotation in the same way synchronously of hollow leading screw 23, roller 6 is oppositely; Promptly counterclockwise revolution the time around self axis forward; Promptly turn clockwise, curved surface and roller 6 screw thread right side curved surfaces engagements on the left of the screw thread of hollow leading screw 23, roller 6 screw threads left side curved surface does not have gap engagement and promotion bearing screwed cap 10 and pre-load nut 12 vertically to left movement with hollow leading screw 23 left side curved surfaces; At this moment, on the roller 6 with major axis leading screw 1 match the part screw thread do not participate in the engagement.
Behind planetary roller screw mechanism work certain hour; Because wearing and tearing need to be regulated the axial clearance of hollow leading screw 23 and 6 of rollers to keep no gap engagement driving, unclamp contraction pressure ring connecting bolt 22 at this moment, the radial compaction power that releasing major axis leading screw 1 and hollow leading screw are 23; Regulate centre bolt 27; Make spring 25 compress, finely tune hollow leading screw 23 vertically and make itself and major axis leading screw 1 compress roller 6 screw threads once more; The gap of adjustment is bigger if desired; And the decrement of existing spring 25 is not enough, adjusts holding down bolt 29 again, increases the initial distance of gap adjustment pad I 26 and gap adjustment pad II28; Thereby increase the decrement of spring 25, be convenient to regulate wider gap through centre bolt 27.To shrink pressure ring connecting bolt 22 at last again and tighten, again major axis leading screw 1 and hollow leading screw 23 compressed with contraction pressure ring II21 through shrinking pressure ring I 20.
Claims (1)
1. the planetary roller screw mechanism that can eliminate axial clearance comprises planetary roller lead screw pair transmitting assemblies, supporting component and axial gap adjusting component; Said supporting component is supported on planetary roller lead screw pair transmitting assemblies on the pedestal; Said axial gap adjusting component is eliminated the axial clearance of said planetary roller lead screw pair transmitting assemblies;
Planetary roller lead screw pair transmitting assemblies mainly comprises major axis leading screw (1), hollow leading screw (23) and roller (6); There is a step to form big end and small end on the said major axis leading screw (1); Said hollow leading screw (23) is enclosed within major axis leading screw (1) small end outer wall, and the step through major axis leading screw (1) only leans on; Hollow leading screw (23) is equipped with through shrinking contraction pressure ring I (20) and the contraction pressure ring II (21) that pressure ring connecting bolt (22) connects away from an end outer wall of major axis leading screw (1), and the outer skew wall that shrinks pressure ring I (20) matches with the interior skew wall that shrinks pressure ring II (21); Shrink pressure ring connecting bolt (22) when turning, the outer skew wall that shrinks pressure ring I (20) produces interaction force with the interior skew wall that shrinks pressure ring II (21), so that hollow leading screw (23) radial compaction major axis leading screw (1) outer wall;
Plurality of rollers (6) is installed on the left planet carrier (7) and right planet carrier (15) at its two ends, is engaged on the outer wall of major axis leading screw (1) and hollow leading screw (23) abutting end simultaneously circumference uniform distribution; Bearing screwed cap (10) and pre-load nut (12) then are engaged on the outside of plurality of rollers (6), form the planetary roller screw structure; Flexible unit (11) between bearing screwed cap (10) and the pre-load nut (12);
The straight-tooth of said roller (6) two end portions screw thread respectively with the engagement of left side ring gear (9) and right side ring gear (13), guarantee the axis and major axis leading screw (1), hollow leading screw (23) keeping parallelism of roller (6), thus assurance screw thread normal engaged; Said left side ring gear (9) and right side ring gear (13) are respectively charged into bearing screwed cap (10) and pre-load nut (12) inboard through interference fit; Left side shaft end ring (8) and right side shaft end ring (14) are accomplished the axially locating effect of left side ring gear (9) and right side ring gear (13) respectively and are prevented coming off of left planet carrier (7) and right planet carrier (15);
Said axial gap adjusting component is installed in the end of hollow leading screw (23) away from major axis leading screw (1); Axial gap adjusting component comprises gap adjustment pad I (26), gap adjustment pad II (28), spring (25), centre bolt (27), holding down bolt (29) and stop ring (24); Holding down bolt (29) links together the gap adjustment pad I (26) and the gap adjustment pad II (28) at spring (25) two ends, and under the effect of spring (25), initial distance obtains adjustment between gap adjustment pad I (26) and the gap adjustment pad II (28); Some springs (25) circle distribution, the one of which end withstands the end of major axis leading screw (1) through gap adjustment pad I (26), and the other end withstands the terminal inwardly circumferentia of emersion of hollow leading screw (23) through gap adjustment pad II (28), stop ring (24) respectively; Centre bolt (27) passes gap adjustment pad I (26), gap adjustment pad II (28) and major axis leading screw (1) successively, above-mentioned axial gap adjusting component is fixed on the major axis leading screw (1), and can passes through the decrement of centre bolt (27) Regulation spring (25);
Said supporting component two groups of identical left sides supporting component and right side supporting component, left side supporting component and right side supporting component are installed in major axis leading screw (1) and hollow leading screw (23) opposite end respectively; Said left side supporting component comprises that axially being installed in major axis leading screw (1) successively holds the left side bearing sleeve (4) of outer wall, left-hand axis to roller bearing (3) and left side end ring (2) greatly; Left side bearing sleeve (4) provides the loading of left side double-row conical bearing (5) and only leans against on the step of major axis leading screw (1) outer wall, and left side seal ring (30) makes left side end ring (2) and major axis leading screw (1) hold between the outer wall greatly and seals; Have the left side bolt hole (31) that is connected with pedestal on the left side end ring (2); The right side supporting component accordingly also by right side double-row conical bearing (16), right side bearing sleeve (17), right-hand axis to roller bearing (18), right side end ring (19), right side seal ring (33) and right side bolt hole (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210118236.6A CN102628500B (en) | 2012-04-19 | 2012-04-19 | Planet roller screw mechanism capable of eliminating axial gaps |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210118236.6A CN102628500B (en) | 2012-04-19 | 2012-04-19 | Planet roller screw mechanism capable of eliminating axial gaps |
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| CN102628500A true CN102628500A (en) | 2012-08-08 |
| CN102628500B CN102628500B (en) | 2014-07-09 |
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| CN201210118236.6A Active CN102628500B (en) | 2012-04-19 | 2012-04-19 | Planet roller screw mechanism capable of eliminating axial gaps |
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Address after: No. 400 Fangchun Road, Pudong New Area Free Trade Pilot Area, Shanghai, 200120 Patentee after: Shanghai Dingbai Precision Mechanical and Electrical Co.,Ltd. Address before: Floor 3, building 1, 400 Fangchun Road, Shanghai pilot Free Trade Zone, 200120 Patentee before: Shanghai Dingbai Precision Mechanical and Electrical Co.,Ltd. |