CN109667906A - The planetary roller screw of ring grain screw rod matching thread axle sleeve - Google Patents
The planetary roller screw of ring grain screw rod matching thread axle sleeve Download PDFInfo
- Publication number
- CN109667906A CN109667906A CN201910045741.4A CN201910045741A CN109667906A CN 109667906 A CN109667906 A CN 109667906A CN 201910045741 A CN201910045741 A CN 201910045741A CN 109667906 A CN109667906 A CN 109667906A
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- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000004323 axial length Effects 0.000 claims description 7
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
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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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- 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
- F16H25/24—Elements essential to such mechanisms, e.g. screws, nuts
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The present invention proposes that a kind of planetary roller screw of ring grain screw rod matching thread axle sleeve, planetary roller screw include: screw rod, and the periphery of screw rod is provided with first groove circumferentially, and first groove is formed as the ring-type being closed in the circumferential direction of screw rod；Axle sleeve, axle sleeve are sheathed on screw rod, and the inner surface of axle sleeve is provided with a plurality of second groove extended along hand of helix, and first groove and second groove are intersected；And multiple rollers, the periphery of roller are provided with a plurality of convex tooth, every convex thread form becomes the ring-type being closed in the circumferential direction of roller, and convex dental inlay enters the crossover location of first groove and second groove.The planetary roller screw of ring grain screw rod matching thread axle sleeve by adopting the above technical scheme is in the planetary roller screw course of work, convex tooth moves in the first groove of annular closed, fix roller relative to the axial position of screw rod, make planetary roller screw both can be big with bearing capacity, drive position precision is high, simultaneously can be small with small vibration and noise, operation is smooth.
Description
Technical field
The invention belongs to technical field of mechanical transmission, and in particular to a kind of planetary roller of ring grain screw rod matching thread axle sleeve
Lead screw.
Background technique
Planetary roller screw is a kind of novel transmission device, can convert rotational motion into linear motion.Planet
Roller screw has higher shock resistance than conventional ball lead screw, and the static load of planetary roller screw is about conventional ball lead screw
3 times, the service life is about 15 times of conventional ball lead screw.And planetary roller screw can have higher rotation speed and rotation
Acceleration, therefore it is widely used in the fields such as precision instrument, weaponry, industrial robot and aerospace.
A kind of existing normal formula planetary roller screw includes screw rod, axle sleeve and roller.The outer peripheral surface of screw rod is provided with outer
Screw thread, the inner peripheral surface of axle sleeve are provided with the internal screw thread of identical as external screw thread head number and tooth form, and roller is provided with identical as external screw thread
The one start screw of tooth form.External screw thread, internal screw thread and single-threaded tooth form are such as triangle.Axle sleeve is sheathed on screw rod, if
A dry roller is uniformly arranged along the circumferencial direction of screw rod.When screw rod rotates, roller not only revolved around the axis of screw rod, but also around roller
The axis rotation of itself.Internal screw thread and external screw thread helix angle having the same, can ensure pure rolling when roller is engaged with axle sleeve
It is dynamic, without along axial displacement.This planetary roller screw processes spiral shell adding the very high processing and manufacturing precision of man-hour requirement
Line needs biggish processing cost.
Another existing circulating planetary roller screw includes screw rod, axle sleeve, roller and resets ring.The outer peripheral surface of screw rod
It is provided with external screw thread, the inner peripheral surface of axle sleeve is provided with the internal screw thread of identical as external screw thread head number and tooth form, external screw thread and internal screw thread
Tooth form be such as triangle.Roller is provided with ring screw, and the lift angle of ring screw is zero.Ring (resetting apparatus) is resetted to set
It is placed in the end of roller, ring is resetted and is provided with protrusion, roller often rotates a circle around the axis of screw rod, and protrusion will stir roller
Make its position reset.The advantage of this circulating planetary roller screw is to reach higher using smaller lead of screw thread
Position precision, simultaneously because meshing point is more, bearing capacity is also bigger.But reset ring and will lead to friction and impact increase, it produces
Raw vibration and noise causes operation irregularity.
Summary of the invention
Based on the defect of the above-mentioned prior art, the present invention is directed to propose a kind of planet of ring grain screw rod matching thread axle sleeve rolls
Column lead screw makes planetary roller screw both can be big with bearing capacity, and drive position precision height can not also generate impact, keeps operation flat
It is suitable.
The present invention proposes a kind of planetary roller screw of ring grain screw rod matching thread axle sleeve, the planetary roller screw packet
It includes:
Screw rod, the periphery of the screw rod are provided with first groove circumferentially, and the first groove is formed as in institute
State the ring-type being closed in the circumferential direction of screw rod；
Axle sleeve, the axle sleeve are sheathed on the screw rod, and the inner surface of the axle sleeve is provided with a plurality of to be prolonged along hand of helix
The second groove stretched, the first groove and the second groove are intersected；And
Multiple rollers, between the screw rod and the axle sleeve, the periphery of the roller is provided with the multiple roller
A plurality of convex tooth, every convex thread form become the ring-type being closed in the circumferential direction of the roller, and the convex dental inlay enters described first
The crossover location of groove and the second groove.
Preferably, the outer peripheral surface of the screw rod is provided with the first engaging section, and the outer peripheral surface of the roller is provided with second and nibbles
Conjunction portion does the roller on the outer peripheral surface of the screw rod by first engaging section and second engaging section cooperation pure
It rolls.
Preferably, first engaging section and second engaging section are straight-tooth shape, and second engaging section is formed in institute
State the convex tooth at the axial ends of roller.
Preferably, the plane where the first groove is vertical with the axial direction of the screw rod, where the convex tooth
Plane is vertical with the axial direction of the roller.
Preferably, the convex tooth is embedded in all or part of first groove；And/or
The convex tooth is embedded in all or part of second groove.
Preferably, have between any two adjacent first grooves in a plurality of first groove identical or different
Distance.
Preferably, the axial length of the screw rod occupied by the first groove is less than occupied by the second groove
The axial length of the axle sleeve.
Preferably, the distance between two adjacent described convex teeth are distances between two adjacent first grooves
And/or the integral multiple of the screw pitch of the second groove.
Preferably, in the planetary roller screw course of work, the convex dental inlay enters first ditch of closed hoop
Slot, the roller are fixed relative to the axial position of the screw rod.
Preferably, the planetary roller screw is not provided with the resetting apparatus for resetting the roller.
Preferably, the edge of the first groove is triangle perpendicular to the section of the plane of the extending direction of the first groove
Shape, the edge of the second groove are triangle, the convex tooth perpendicular to the section of the plane of the extending direction of the second groove
Section along the plane of the extending direction perpendicular to the convex tooth is triangle.
Preferably, the planetary roller screw further includes retainer, the planetary roller screw radially, the guarantor
It holds erection to be placed between the screw rod and the axle sleeve, the retainer is provided with the locating slot for accommodating the roller.
The planetary roller screw of ring grain screw rod matching thread axle sleeve by adopting the above technical scheme is in planetary roller screw work
During work, convex tooth moves in the first groove of annular closed, fixes roller relative to the axial position of screw rod, without multiple
Position device resets, to make planetary roller screw both can be big with bearing capacity, drive position precision be high, at the same can with small vibration and
Noise is small, and operation is smooth.
Detailed description of the invention
Fig. 1 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the first embodiment of the present invention
Cross-sectional view (retainer is not shown).
Fig. 2 shows the partial enlarged views of Fig. 1.
Fig. 3 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the first embodiment of the present invention
Configuration schematic diagram.
Fig. 4 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the first embodiment of the present invention
The cross-sectional view (retainer is not shown) along cross section.
Fig. 5 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the second embodiment of the present invention
Partly cut-away structural schematic diagram.
Fig. 6 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the second embodiment of the present invention
Cross-sectional view.
Fig. 7 shows the partial enlarged view of Fig. 6.
Fig. 8 shows the planetary roller screw of ring grain screw rod matching thread axle sleeve according to the third embodiment of the present invention
Partly cut-away structural schematic diagram.
Fig. 9 shows the partial enlarged view of Fig. 8.
Description of symbols
1 screw rod, 11 first groove, 12 first engaging section
2 axle sleeve, 21 second groove
Convex 32 second engaging section of tooth of 3 roller 31
4 retainer, 41 locating slot
A axial direction R radial direction C is circumferential.
Specific embodiment
Exemplary embodiments of the present invention are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only used for
How teaching those skilled in the art implement the present invention, rather than all feasible modes that exhaustion is of the invention, without in
It limits the scope of the invention.
First embodiment
As shown in Figures 1 to 4, the present invention provides a kind of planetary roller screw comprising screw rod 1, axle sleeve 2 and roller 3.
Screw rod 1 is generally cylindric, and the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends, for example,
The quantity of first groove 11 is greater than or equal to 2.A plurality of first groove 11 is set in parallel to each other.First groove 11 is formed as closing
The ring-type of conjunction, the edge of first groove 11 can be such as triangle perpendicular to the section of the plane of the extending direction of first groove 11
Shape.Plane where first groove 11 can be vertical with the axial A of screw rod 1.
Axle sleeve 2 is whole can be sheathed on screw rod 1 for cylindrical shape, axle sleeve 2, and the axis of the axis and screw rod 1 of axle sleeve 2 can be
It is overlapped.The inner surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set more
Item, in the present embodiment, a plurality of second groove 21 can have identical pitch, and uniform on the axial A of axle sleeve
It is spaced apart.Preferably, the quantity of second groove 21 is greater than or equal to 3, such as second groove 21 can be 6.Second groove
21 edge can be such as triangle perpendicular to the section of the plane of the extending direction of second groove 21.
The screw pitch of second groove 21 can be equal to the distance between adjacent two first grooves 11.It is to be appreciated that adjacent two
The distance between first groove 11 refers to the distance between the same position of adjacent two first grooves 11, such as adjacent two
The distance between the center line of first groove 11.For multiple thread, screw pitch is between two adjacent second grooves 21
Distance, screw pitch be equal to lead divided by screw thread head number.First groove 11 and second groove 21 are intersected, in this embodiment,
Every first groove 11 and 6 second groove 21 forms crossover location at 6.
Further, the axial length of screw rod 1 occupied by a plurality of first groove 11 is less than occupied by second groove 21
The axial length of axle sleeve 2.Particularly, the partial region on the axial A of screw rod 1 is provided with first groove 11, such as the axis of screw rod 1
Middle section on A is provided with first groove 11, and whole positions in 2 axial direction of axle sleeve are provided with second groove 21.
Roller 3 is whole can be it is cylindric, roller 3 positioned at screw rod 1 and axle sleeve 2 between, the axis of roller 3 and screw rod 1
Axis is parallel.Roller 3 can be set multiple, it is preferable that the quantity of roller 3 is greater than or equal to 3, such as roller 3 is provided with 6
It is a.It is appreciated that the quantity of roller 3 can be identical as the head number of first groove 11, or less than the head number of first groove 11.It is more
A roller 3 is uniformly spaced apart on the circumferential C of axle sleeve 2.
The periphery of roller 3 is provided with a plurality of convex tooth 31 that circumferentially C extends, and convex tooth 31 engages and convex with first groove 11
Tooth 31 is engaged with second groove 21, that is to say, that convex tooth 31 is located at the crossover location of first groove 11 and second groove 21.Convex tooth
31 edge can be such as triangle perpendicular to the section of the plane of the extending direction of convex tooth 31.Plane and rolling where convex tooth 31
The axial A of column 3 can be vertical.Distance having the same between any two adjacent convex teeth 31 in multiple convex teeth 31, i.e.,
Multiple convex teeth 31 are equably arranged along axial A.The distance between adjacent two convex teeth 31 can be equal to the screw pitch of first groove 11.
It is to be appreciated that the distance between adjacent two convex teeth 31 refer to the distance between the same position of adjacent two convex teeth 31, such as
The distance between the center line of adjacent two convex teeth 31.The axial length of roller 3 can with occupied by a plurality of first groove 11
The axial A same length of screw rod 1.
The distance between two adjacent convex teeth 31 can be the distance between two adjacent first grooves 11 and/or
The integral multiple of the screw pitch of two grooves 21, such as one times, twice etc..In this embodiment, between two adjacent convex teeth 31
Distance is equal to the distance between two adjacent first grooves 11, and the distance between two adjacent convex teeth 31 are equal to second
The screw pitch of groove 21.It is embedded in convex tooth 31 in whole first grooves 11, and is embedded in convex tooth 31 in whole second grooves 21.
Further, planetary roller screw further includes retainer 4, and retainer 4 is generally cylindric, and retainer 4 is sheathed on
Screw rod 1, on radial R, retainer 4 is between screw rod 1 and axle sleeve 2.Retainer 4 is provided with for accommodating the multiple of roller 3
Locating slot 41, locating slot 41 can be for along the strip holes of the axial A of retainer 4 extension.
It is appreciated that convex tooth 31 can be embedded in first groove 11 and compared with the planetary roller screw of the prior art
The crossover location of two grooves 21.And necessarily setting retainer 4 is used for positioning roller 3.
When the rotation of axle sleeve 2 makes screw rod 1 axially A is mobile relative to axle sleeve 2, axle sleeve 2, which is applied to 3 frictional force of roller, to be made
Roller 3 around roller 3 axis rotation, although roller 3 can be moved along the second groove 21 of axle sleeve 2, roller 3 without departing from
First groove 11 where it, thus, axial A of the roller 3 on the whole with screw rod 1 along screw rod 1 is moved.
Second embodiment
The overall structure of planetary roller screw according to the second embodiment of the present invention and the planet of first embodiment
Roller screw is identical.In the present embodiment, identical attached drawing is marked for identical with first embodiment or similar component
Label, and omit detailed description thereof.
As shown in Figures 5 to 7, the present invention provides a kind of planetary roller screw comprising screw rod 1, axle sleeve 2 and roller 3.
Screw rod 1 is generally cylindric, and the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends.First ditch
Slot 11 is formed as the ring-type of closure.A plurality of first groove 11 is set in parallel to each other, and any two adjacent first grooves
It can have identical distance between 11.
Axle sleeve 2 is whole can be sheathed on screw rod 1 for cylindrical shape, axle sleeve 2, and the axis of the axis and screw rod 1 of axle sleeve 2 can be
It is overlapped.The inner surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set more
Item.First groove 11 and second groove 21 are intersected.
The screw pitch of second groove 21 can be the integral multiple of the distance between two adjacent first grooves 11, such as two
Times.It is appreciated that the distance between two adjacent first trenches 11 can also be the integral multiple of the screw pitch of second groove 21.
Roller 3 is whole can be it is cylindric, roller 3 positioned at screw rod 1 and axle sleeve 2 between, the axis of roller 3 and screw rod 1
Axis is parallel.The periphery of roller 3 is provided with a plurality of convex tooth 31 that circumferentially C extends, convex tooth 31 engaged with first groove 11 and
Convex tooth 31 is engaged with second groove 21, that is to say, that convex tooth 31 is located at the crossover location of first groove 11 and second groove 21.?
In the embodiment, the distance between two adjacent convex teeth 31 are equal to the screw pitch of second groove 21, and two adjacent convex
The distance between tooth 31 be equal to two adjacent first grooves 11 the distance between integral multiple, such as twice.Partial
It is embedded in convex tooth 31 in one groove 11, and is embedded in convex tooth 31 in whole second grooves 21.
The retainer in first embodiment is eliminated in this second embodiment, it will be understood that the row with the prior art
Star roller screw is compared, since convex tooth 31 is located at the crossover location of first groove 11 and second groove 21, it is not necessary to use holding
Frame 4 positions roller 3.
When the rotation of axle sleeve 2 makes screw rod 1 axially A is mobile relative to axle sleeve 2, axle sleeve 2, which is applied to 3 frictional force of roller, to be made
Roller 3 around roller 3 axis rotation, although roller 3 can be moved along the second groove 21 of axle sleeve 2, roller 3 without departing from
First groove 11 where it, thus, axial A of the roller 3 on the whole with screw rod 1 along screw rod 1 is moved.
Third embodiment
The overall structure of planetary roller screw according to the third embodiment of the present invention and the planet of first embodiment
Roller screw is identical.In the present embodiment, identical attached drawing is marked for identical with first embodiment or similar component
Label, and omit detailed description thereof.
As shown in Figure 8 and Figure 9, the present invention provides a kind of planetary roller screw comprising screw rod 1, axle sleeve 2 and roller 3.
Screw rod 1 is generally cylindric, and the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends.First ditch
Slot 11 is formed as the ring-type of closure.A plurality of first groove 11 is set in parallel to each other, and any two adjacent first grooves
It can have identical distance between 11.
Screw rod 1 is provided with the first engaging section 12, and the first engaging section 12 is set to the outer peripheral surface of screw rod 1, the first engaging section 12
It can be straight-tooth shape, the first engaging section 12 can be set in the part at the axial both ends A of the first groove 11 of screw rod 1.
Axle sleeve 2 is whole can be sheathed on screw rod 1 for cylindrical shape, axle sleeve 2, and the axis of the axis and screw rod 1 of axle sleeve 2 can be
It is overlapped.The inner surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set more
Item.First groove 11 and second groove 21 are intersected.
Roller 3 is whole can be it is cylindric, roller 3 positioned at screw rod 1 and axle sleeve 2 between, the axis of roller 3 and screw rod 1
Axis is parallel.The periphery of roller 3 is provided with a plurality of convex tooth 31 that circumferentially C extends, convex tooth 31 engaged with first groove 11 and
Convex tooth 31 is engaged with second groove 21, that is to say, that convex tooth 31 is located at the crossover location of first groove 11 and second groove 21.
Roller 3 is provided with the second engaging section 32, and the second engaging section 32 is set to the periphery of roller 3, and the second engaging section 32 can
To be the straight-tooth shape that can be engaged with the first engaging section 12, the second engaging section 32 be can be set in the portion at the axial both ends A of roller 3
Point, the second engaging section 32 is set to convex tooth 31, cooperate the second engaging section 32 can both with the first engaging section 12, can also with the
The cooperation of two grooves 32.
By the cooperation of the first engaging section 12 and the second engaging section 32, roller 3 can be made to do on the outer peripheral surface of screw rod 1 pure
It rolls, roller 3 will not slide in first groove 11, not generate sliding between roller 3 and screw rod 1, and then make planetary roller silk
The transmission accuracy of bar improves.
Although the specific technical solution of the present invention is set forth in the above specific embodiment, also
It should be understood that
(1) in the above-described embodiment, have between any two adjacent first grooves 11 in a plurality of first groove 11
Identical distance.However the invention is not limited thereto, it can between any two adjacent first grooves 11 in a plurality of first groove 11
With different distances.For example, at a distance from certain the first groove another first groove adjacent with its axial direction side A and
It can be different at a distance from this certain the first groove another first groove adjacent with its axial direction other side A.
(2) in the above-described embodiment, a plurality of second groove 21 is uniformly spaced apart on the circumferential C of screw rod 1.However this
Invent it is without being limited thereto, can with a plurality of second groove 21 lead having the same and a plurality of second groove 21 axle sleeve 2 axis
It is non-uniform on A to be spaced apart, make adjacent the distance between two second grooves 21 can be unequal.
(3) in the above-described embodiment, in multiple convex teeth 31 between any two adjacent convex teeth 31 it is having the same away from
From that is, multiple convex teeth 31 are equably arranged along axial A.However the invention is not limited thereto, in multiple convex teeth any two it is adjacent
Can also have between convex tooth different away from that is, multiple convex teeth are unevenly arranged along axial direction A.
(4) in the above-described embodiment, convex tooth 31 is embedded in whole second grooves 21.However the invention is not limited thereto,
Can also be embedded in convex tooth in the second groove of part, for example, adjacent two convex teeth distance be adjacent two second grooves integer
Times.
(5) in the above-described embodiment, multiple rollers 3 are uniformly spaced apart on the circumferential C of axle sleeve 2.However it is of the invention
It is without being limited thereto, it can be spaced apart so that multiple rollers 3 are non-uniform on the circumferential C of axle sleeve 2, such as second groove is arranged 8, rolling
Column is arranged 3.
(6) in the above-described embodiment, can be can be mutually matched straight for the first engaging section 12 and the second engaging section 32
Dentation, however the invention is not limited thereto, the first engaging section 12 and the second engaging section 32 can also be helical teeth shape.
(7) in the above-described embodiment, the section of convex tooth 31, first groove 11 and second groove 21 is triangle, however
The invention is not limited thereto, and the section of convex tooth 31, first groove 11 and second groove 21 can also be arc or other shapes.It can be with
Understand, the section of convex tooth 31, first groove 11 and second groove 21 is arc, and convex tooth 31 is embedded in first groove 11 and the second ditch
In slot 21, screw rod 1 and 2 contact area of axle sleeve can be increased, the impact resistance of planetary roller screw can be improved, increase carrying
Power prolongs the service life.And no setting is required reset ring (resetting apparatus) in the prior art, avoid reset ring execute it is multiple
Roller is impacted when position, reduces vibration and noise, keeps planetary roller screw operation smooth.
Further, first groove 11 and second groove 21 can be Goethe's formula groove (singing special formula groove).Planet is rolled
Column lead screw applies prefastening load appropriate, eliminates axial gap, and planetary roller screw can be made to have preferably rigidity, reach higher
Precision.
Claims (12)
1. a kind of planetary roller screw of ring grain screw rod matching thread axle sleeve, which is characterized in that the planetary roller screw includes:
Screw rod, the periphery of the screw rod are provided with first groove circumferentially, and the first groove is formed as in the silk
The ring-type being closed in the circumferential direction of bar；
Axle sleeve, the axle sleeve are sheathed on the screw rod, and the inner surface of the axle sleeve, which is provided with, a plurality of to be extended along hand of helix
Second groove, the first groove and the second groove are intersected；And
Multiple rollers, between the screw rod and the axle sleeve, the periphery of the roller is provided with a plurality of the multiple roller
Convex tooth, every convex thread form become the ring-type being closed in the circumferential direction of the roller, and the convex dental inlay enters the first groove
With the crossover location of the second groove.
2. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that the silk
The outer peripheral surface of bar is provided with the first engaging section, and the outer peripheral surface of the roller is provided with the second engaging section, engages by described first
Portion and second engaging section cooperation make the roller do pure rolling on the outer peripheral surface of the screw rod.
3. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 2, which is characterized in that described
One engaging section and second engaging section are straight-tooth shape, and second engaging section is formed in the institute at the axial ends of the roller
State convex tooth.
4. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
Plane where one groove with the axial direction of the screw rod be it is vertical, the axial direction of plane and the roller where the convex tooth is
Vertical.
5. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that all or
The convex tooth is embedded in the partial first groove；And/or
The convex tooth is embedded in all or part of second groove.
6. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that a plurality of institute
Stating has identical or different distance between any two adjacent first grooves in first groove.
7. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
The axial length of the screw rod occupied by one groove is less than the axial length of the axle sleeve occupied by the second groove.
8. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that two phases
Adjacent the distance between the convex tooth is the screw pitch of distance and/or the second groove between two adjacent first grooves
Integral multiple.
9. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
In the planetary roller screw course of work, the convex dental inlay enters the first groove of closed hoop, and the roller is relative to described
The axial position of screw rod is fixed.
10. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
Planetary roller screw is not provided with the resetting apparatus for resetting the roller.
11. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
The edge of first groove is triangle, the edge of the second groove perpendicular to the section of the plane of the extending direction of the first groove
Section perpendicular to the plane of the extending direction of the second groove is triangle, and the convex tooth is along prolonging perpendicular to the convex tooth
The section for stretching the plane in direction is triangle.
12. the planetary roller screw of ring grain screw rod matching thread axle sleeve according to claim 1, which is characterized in that described
Planetary roller screw further includes retainer, the planetary roller screw radially, the retainer is set to the screw rod
Between the axle sleeve, the retainer is provided with the locating slot for accommodating the roller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045741.4A CN109667906A (en) | 2019-01-17 | 2019-01-17 | The planetary roller screw of ring grain screw rod matching thread axle sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910045741.4A CN109667906A (en) | 2019-01-17 | 2019-01-17 | The planetary roller screw of ring grain screw rod matching thread axle sleeve |
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| CN109667906A true CN109667906A (en) | 2019-04-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910045741.4A Pending CN109667906A (en) | 2019-01-17 | 2019-01-17 | The planetary roller screw of ring grain screw rod matching thread axle sleeve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110778672A (en) * | 2019-11-13 | 2020-02-11 | 江苏科技大学 | Planetary roller screw type inerter and inerter coefficient calculation method thereof |
| CN111779810A (en) * | 2020-06-01 | 2020-10-16 | 北京精密机电控制设备研究所 | Planetary roller screw |
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| JP2008309218A (en) * | 2007-06-13 | 2008-12-25 | Nsk Ltd | Screw device |
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| CN107725708A (en) * | 2017-11-14 | 2018-02-23 | 李淼 | A kind of planetary roller screw |
| CN108757865A (en) * | 2018-08-20 | 2018-11-06 | 北京因时机器人科技有限公司 | Transmission mechanism and transmission device |
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| CN110778672A (en) * | 2019-11-13 | 2020-02-11 | 江苏科技大学 | Planetary roller screw type inerter and inerter coefficient calculation method thereof |
| CN111779810A (en) * | 2020-06-01 | 2020-10-16 | 北京精密机电控制设备研究所 | Planetary roller screw |
| CN111779810B (en) * | 2020-06-01 | 2022-04-08 | 北京精密机电控制设备研究所 | Planetary roller screw |
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