CN208348420U - A kind of planetary roller screw - Google Patents
A kind of planetary roller screw Download PDFInfo
- Publication number
- CN208348420U CN208348420U CN201721709646.2U CN201721709646U CN208348420U CN 208348420 U CN208348420 U CN 208348420U CN 201721709646 U CN201721709646 U CN 201721709646U CN 208348420 U CN208348420 U CN 208348420U
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- screw
- roller
- wall
- external tooth
- nut
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- 230000033001 locomotion Effects 0.000 claims abstract description 30
- 238000005096 rolling process Methods 0.000 claims description 3
- 239000000969 carrier Substances 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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Abstract
The utility model discloses a kind of planetary roller screw, including nut assembly, screw rod and push-rod assembly, screw rod is cartridge type, screw thread is provided on outer wall, inner wall is equipped with internal screw thread, nut assembly includes that nut, first support component, the first circlip, and nut assembly are sleeved on the outside of screw rod, and first support component contains two first planet carriers and multiple first rollers；Push-rod assembly is mounted in screw rod, and push-rod assembly includes push rod, second support component, external tooth thread bush and retaining ring, and second support component contains two the second planet carriers and multiple second rollers；Using two rollers and nut, screw rod engaged transmission respectively, solve in the prior art planetary roller screw can only one-way movement the technical issues of, and the utility model more compact structure, stroke range is wider, and can be exported with both direction.
Description
Technical field
The utility model relates to lead screw technical field more particularly to a kind of planetary roller screws.
Background technique
Lead screw is a kind of mechanical device that can mutually convert rotary motion and linear motion, existing common high efficiency silk
There are mainly two types of thick sticks, and one is ball-screws, and one is planetary roller screws；The latter is mainly made of lead screw, roller and nut,
Due to using screwed roller instead of ball as power transmission unit, compared with ball-screw, power transmission unit has
Bigger contact radius and more contact points, therefore be all improved in rated load, rigidity, speed, service life, but it is existing
Planetary roller screw can only make the flexible linear motion in a direction, stroke range is narrow.
Utility model content
The purpose of the utility model is to provide a kind of planetary roller screws, solve planetary roller screw in the prior art
Can only one-way movement technical problem, the utility model have broader stroke.
A kind of planetary roller screw, including nut assembly and screw rod, push-rod assembly, the screw rod are hollow structure, and silk
Screw thread is provided on the inside and outside wall of bar, the nut assembly is sleeved on the outside of screw rod, and the push-rod assembly is arranged in the silk
Inside bar.
Based on the above technical solution, the utility model can also do following improvement:
Further, the nut assembly includes nut, first support component and the first circlip, the nut it is interior
Screw thread being provided on wall, and nut is sleeved on the screw rod, first support component setting is in nut interior, and described the
Restricted the first circlip that it is axially moved is arranged in one bracket component both ends.
Further, the first support component includes two first planet carriers and multiple first rollers, the first row
Carrier is arranged at intervals on the first roller two sides, and the outer wall of first roller is provided with screw thread, and the both ends of first roller are set
It is equipped with external tooth, and the external screw thread of the first roller is engaged with the external screw thread of the internal screw thread of the nut, screw rod, using having for this step
Beneficial effect is that the first roller, first planet carrier are capable of forming an entirety, convenient for linkage.
Further, the nut assembly further includes two ring gears, and the ring gear interval is fixedly mounted on the spiral shell
Female internal both ends；The first planet carrier is fixed on the inside of the ring gear by first circlip, with the internal tooth
Circle, the first roller and nut are assembled into an entirety；It is provided with internal tooth on the inner wall of the ring gear, with first roller two
The outer tooth engagement at end, the beneficial effect using this step is that the first roller can be engaged with ring gear, to guarantee that nut can be with straight line
Movement output can also be exported with rotary motion.
Further, the push-rod assembly includes push rod, second support component and external tooth thread bush, and the push rod setting exists
Inside screw rod, and push rod end is equipped with the external tooth thread bush, and the external tooth thread bush outer sheath is equipped with second support component,
And external tooth thread bush is axially fixed on push rod by retaining ring, is provided with screw thread on the outer wall of the external tooth thread bush, it is described
External tooth screw thread external threading both ends are provided with external tooth；Restricted the second bullet that it is axially moved is arranged in second support component both ends
Property retaining ring, is assembled into an entirety with external tooth thread bush, is fixed on the shaft end of the push rod, using the beneficial effect second of this step
Bracket component and external tooth thread bush are capable of forming an entirety, are conducive to link in this way.
Further, the second support component includes two the second planet carriers and multiple second rollers, second row
Carrier is arranged at intervals on second roller two sides, and the outer wall of second roller is provided with screw thread, and the outer wall of the second roller
It is engaged with the outer wall of the inner wall of the screw rod, the external tooth thread bush, second roller both ends are additionally provided with external tooth, described
The external tooth at the second roller both ends is meshed with the external tooth that external tooth thread bush both ends are arranged, the beneficial effect using this step be from
And guarantees that push rod can move along a straight line and export and can also be exported with rotary motion.
Further, the screw thread of the screw rod inside and outside wall, the screw thread of nut inner wall, the screw thread of the first roller outer wall, second
The screw thread of roller outer wall and the screw thread of external tooth thread bush outer wall are single head or multiple thread, and the beneficial effect using this step is benefit
With multiple thread convenient for transmission.
The utility model has the beneficial effects that
The utility model is that a kind of planetary roller screw may be implemented to be driven, in silk on the outside of lead screw by nut assembly
May be implemented to be driven by push-rod assembly inside thick stick, the transmission direction of such the utility model can there are two, while stroke away from
From double；The utility model realizes nut, push rod long range, the operation of big stroke action, revolving speed phase constant in original volume size
With in the case where, stroke is amplified 2 times, space rate also amplifies 2 times；The utility model is compact-sized, and the processing is simple, assembly
It is convenient.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of structural schematic diagram of planetary roller screw described in the utility model specific embodiment；
Fig. 2 is a kind of portion A enlarged diagram of planetary roller screw described in the utility model specific embodiment；
Fig. 3 is a kind of portion B enlarged diagram of planetary roller screw described in the utility model specific embodiment；
Appended drawing reference:
1- nut assembly；2- screw rod；3- nut；4- first support component；The first circlip of 5-；6- first planet carrier；
The first roller of 7-；8- ring gear；9- push-rod assembly；10- push rod；11- second support component；12- external tooth thread bush；13- locking
Ring；The second circlip of 14-；The second planet carrier of 15-；The second roller of 16-；17- fastener.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
Embodiment 1:
As shown in Figure 1, 2, a kind of planetary roller screw, including nut assembly 1 and screw rod 2 are set on the outer wall of the screw rod 2
It is equipped with screw thread, the nut assembly 1 includes nut 3, first support component 4 and the first circlip 5, and the nut assembly 1
It is sleeved on 2 outside of screw rod, is provided with screw thread on the inner wall of the nut 3, and nut 3 is sleeved on the screw rod 2, described first
Bracket component 4 is arranged inside nut 3, and restricted the first bullet that it is axially moved is arranged in 4 both ends of first support component
Property retaining ring 5, nut 3, first support component 4 and the first circlip 5 combination formed a global facility, in this way convenient for link,
In assembly, the first circlip 5 is located on the inner wall of ring gear 8, for limiting the axial movement of first support component 4.
Wherein, the first support component 4 includes two first planet carriers 6 and multiple first rollers 7, first planet
The setting of the interval of frame 6, and 6 arranged for interval of first planet carrier, in 7 two sides of the first roller, the outer wall of first roller 7 is arranged
There is a screw thread, the both ends of first roller 7 are equipped with external tooth, and the inner wall of the outer wall of the first roller 7 and the nut 3, screw rod 2
Outer wall engages, and two first planet carriers 6 and multiple first rollers 7 are fixed in nut 3 by two the first circlips 5.
Nut assembly 1 further includes two ring gears 8 simultaneously, and the ring gear 8 is spaced with fastener 17 and is fixed on the spiral shell
Inside mother 3, fastener 17 can be the fixing pieces such as bolt, pin shaft；The first planet carrier 6 is located at 8 inside of ring gear, with two
First circlip 5 is fixed in two ring gears 8, is assembled into an entirety with two ring gears 8 and nut 3；The internal tooth
It is provided with internal tooth on the inner wall of circle 8,7 both ends of the first roller are provided with the external tooth with the interior tooth engagement, at this time the first rolling
Column 7 had both made rotation in nut 3 or had made to surround the revolution motion of screw rod 2.Nut 3 is for linear motion when 2 rotary motion of screw rod,
It can be for linear motion with screw rod 2 when 3 rotary motion of nut.
As shown in Figure 1,3, the screw rod 2 is hollow structure, and screw thread is provided on the inner wall of screw rod 2, in the screw rod 2
Portion is provided with push-rod assembly 9, using push-rod assembly 9 as second moving parts, is easy to implement bidirectional output, increases stroke.
Wherein, the push-rod assembly 9 includes push rod 10, second support component 11, external tooth thread bush 12 and retaining ring 13,
The push rod 10 is arranged inside screw rod 2, and 10 end of push rod is equipped with the external tooth thread bush 12, the external tooth thread bush 12
Outer sheath is equipped with second support component 11, and external tooth thread bush 12 is axially fixed in push rod 10, the external tooth by retaining ring 13
Screw thread is provided on the outer wall of thread bush 12, the screw thread both ends of external tooth thread bush 12 are provided with external tooth, and second support component 11
Fixation can be assembled with external tooth thread bush 12, is conducive to link in this way；Second circlip 14 is located at 11 liang of second support component
End, second support component 11 is fixed on 12 outer ring of external tooth thread bush, is assembled into an entirety with external tooth thread bush 12.
Wherein, the second support component 11 include two the second planet carriers 15 and multiple second rollers 16, described second
Planet carrier 15 is arranged at intervals on the two sides of second roller 16, and the outer wall of second roller 16 is provided with screw thread, and described
The both ends of two rollers 16 are additionally provided with external tooth, and inner wall, the outer tooth thread of the outer wall of the second roller 16 and the screw rod 2
The outer wall of set 12 engages.
Wherein, 12 both ends of external tooth thread bush are provided with external tooth, the external tooth at 16 both ends of the second roller and described outer
The outer tooth engagement of tooth thread set 12, such push rod also can be realized rotary motion output.
Wherein, the screw thread of 2 inside and outside wall of screw rod, the screw thread of 3 inner wall of nut, the screw thread of 7 outer wall of the first roller, the second rolling
The screw thread of 12 outer wall of screw thread and external tooth thread bush of 16 outer wall of column is single head or multiple thread, is passed using multiple thread
It is dynamic.
The working principle of the utility model；
When screw rod 2 rotates, the external screw thread of screw rod 2 is engaged with the external screw thread of multiple first rollers 7, the first roller 7
Both ends external tooth engaged with the ring gear 8 in nut 3, the first roller 7 makees the rotation of corresponding rotation and revolution around screw rod 2
Movement, first planet carrier 6 are made to surround the concentric rotational movement of screw rod 2, and the internal screw thread of the external screw thread and nut 3 of the first roller 7 is nibbled
The dynamic nut 3 of crossed belt is for linear motion, and screw rod 2 makees active rotary motion, and nut assembly makees passive linear motion；Screw rod 2 rotates
When movement, the internal screw thread of screw rod 2 is engaged with the external screw thread of multiple second rollers 16, the both ends of the second roller 16 and external tooth thread bush
12 outer tooth engagement, the second roller 16 make the rotary motion of corresponding rotation and revolution, the second planet around external tooth thread bush 12
Frame 15 is made to surround the concentric rotational movement of external tooth thread bush 12, and the external screw thread of the second roller 16 engages drive with external tooth thread bush 12
External tooth thread bush 12 is for linear motion, and external tooth thread bush 12 is for linear motion simultaneously together with push rod 10.Screw rod 2 makees active rotation fortune
Dynamic, push-rod assembly makees passive linear motion.In this way, by the rotary motion of lead screw 2, while nut 3 and push rod 11 being driven to make straight line
Movement, finally formed long-range, long range motion action.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the utility model, rather than it is limited
System；Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand: it is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced；And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.
Claims (7)
1. a kind of planetary roller screw, which is characterized in that including nut assembly and screw rod, push-rod assembly, the screw rod is hollow
Structure, and screw thread is provided on the inside and outside wall of screw rod, the nut assembly is sleeved on the outside of screw rod, the push-rod assembly setting
Inside the screw rod.
2. a kind of planetary roller screw according to claim 1, which is characterized in that the nut assembly includes nut,
One bracket component and the first circlip are provided with screw thread on the inner wall of the nut, and nut is sleeved on the screw rod, institute
The setting of first support component is stated in nut interior, and the first of its restricted axial movement is arranged in first support component both ends
Circlip.
3. a kind of planetary roller screw according to claim 2, which is characterized in that the first support component includes two
First planet carrier and multiple first rollers, the first planet carrier are arranged at intervals on the first roller two sides, first roller
Outer wall is provided with screw thread, and the both ends of first roller are provided with external tooth, and the external screw thread of the first roller and the nut is interior
Screw thread, screw rod external screw thread engage.
4. a kind of planetary roller screw according to claim 3, which is characterized in that the nut assembly further includes in two
Gear ring, the ring gear interval are fixedly mounted on the nut interior both ends；The first planet carrier passes through first elasticity
Retaining ring is fixed on the inside of the ring gear, is assembled into an entirety with the ring gear, the first roller and nut；The ring gear
Inner wall on be provided with internal tooth, the outer tooth engagement with first roller both ends.
5. a kind of planetary roller screw according to claim 4, which is characterized in that the push-rod assembly includes push rod,
Two bracket components and external tooth thread bush, the push rod is arranged inside screw rod, and push rod end is equipped with the external tooth thread bush,
The external tooth thread bush outer sheath is equipped with second support component, and external tooth thread bush is axially fixed on push rod by retaining ring,
Screw thread is provided on the outer wall of the external tooth thread bush, the external tooth screw thread external threading both ends are provided with external tooth；Described second
Restricted the second circlip that it is axially moved is arranged in frame component both ends, is assembled into an entirety with external tooth thread bush, fixed
In the shaft end of the push rod.
6. a kind of planetary roller screw according to claim 5, which is characterized in that the second support component includes two
Second planet carrier and multiple second rollers, second planet carrier are arranged at intervals on second roller two sides, second rolling
The outer wall of column is provided with screw thread, and the outer wall of the second roller is nibbled with the inner wall of the screw rod, the outer wall of the external tooth thread bush
It closes, second roller both ends are additionally provided with external tooth, and external tooth and the external tooth thread bush both ends at second roller both ends are set
The external tooth set is meshed.
7. a kind of planetary roller screw according to claim 6, which is characterized in that screw thread, the spiral shell of the screw rod inside and outside wall
The screw thread of female inner wall, the screw thread of the first roller outer wall, the screw thread of the second roller outer wall and external tooth thread bush outer wall screw thread be
Single head or multiple thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721709646.2U CN208348420U (en) | 2017-12-08 | 2017-12-08 | A kind of planetary roller screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721709646.2U CN208348420U (en) | 2017-12-08 | 2017-12-08 | A kind of planetary roller screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208348420U true CN208348420U (en) | 2019-01-08 |
Family
ID=64873620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721709646.2U Active CN208348420U (en) | 2017-12-08 | 2017-12-08 | A kind of planetary roller screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208348420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906176A (en) * | 2017-12-08 | 2018-04-13 | 扬州众孚传动科技有限公司 | A kind of planetary roller screw |
-
2017
- 2017-12-08 CN CN201721709646.2U patent/CN208348420U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906176A (en) * | 2017-12-08 | 2018-04-13 | 扬州众孚传动科技有限公司 | A kind of planetary roller screw |
| CN107906176B (en) * | 2017-12-08 | 2024-05-31 | 扬州众孚传动科技有限公司 | Planetary roller screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240128 Address after: 213000, No. 5 Jinjiang Road, Menghe Town, Xinbei District, Changzhou City, Jiangsu Province Patentee after: Jiangsu Runfu Power Technology Co.,Ltd. Country or region after: China Address before: 225000 217 Development West Road, Hanjiang Economic Development Zone, Yangzhou, Jiangsu Patentee before: YANGZHOU CHVER TRANSMISSION TECHNOLOGY CO.,LTD. Country or region before: China |
|
| TR01 | Transfer of patent right |