CN111022603A - Staggered planetary roller screw speed reducer - Google Patents
Staggered planetary roller screw speed reducer Download PDFInfo
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- CN111022603A CN111022603A CN202010013478.3A CN202010013478A CN111022603A CN 111022603 A CN111022603 A CN 111022603A CN 202010013478 A CN202010013478 A CN 202010013478A CN 111022603 A CN111022603 A CN 111022603A
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- planetary roller
- screw
- roller screw
- nut
- bearing
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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
- F16H37/00—Combinations of mechanical gearings, not provided for in groups F16H1/00 - F16H35/00
- F16H37/12—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types
- F16H37/124—Gearings comprising primarily toothed or friction gearing, links or levers, and cams, or members of at least two of these types for interconverting rotary motion and reciprocating motion
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- General Engineering & Computer Science (AREA)
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Abstract
The invention provides an interlaced planetary roller screw speed reducer, and relates to the technical field of speed reducers. The staggered planetary roller screw part speed reducer comprises a speed reducing mechanism and a planetary roller screw mechanism; the planetary roller screw mechanism comprises a screw rod, a nut and a plurality of rollers; the screw rod is arranged in the nut, and a plurality of rollers are arranged between the screw rod and the nut; the speed reducing mechanism comprises a worm wheel and a worm; the worm is in meshing transmission with the worm wheel, and the worm wheel is coaxially connected with the nut. The staggered planetary roller screw speed reducer realizes the conversion of high rotating speed into axial low-speed motion of an output shaft.
Description
Technical Field
The invention relates to the technical field of speed reducers, in particular to an interlaced planetary roller screw speed reducer.
Background
The speed reducer is widely applied to various fields of modern machinery and is relatively precise machinery. The common speed reducers comprise a gear speed reducer, a worm gear speed reducer, a harmonic speed reducer, an RV speed reducer and the like, the transmission ratio of the common speed reducers is different from one to hundreds, and the purposes of reducing the rotating speed and increasing the torque can be achieved.
The input and the output of the common speed reducer on the market are all rotating, but the industry has the requirement of converting high rotating speed into axial low-speed motion of an output shaft, so that the speed reducer capable of converting high rotating speed into axial low-speed motion of the output shaft is urgently needed.
Disclosure of Invention
The invention aims to provide an interlaced planetary roller screw speed reducer to convert high rotating speed into axial low-speed motion of an output shaft.
The invention provides an interlaced planetary roller screw speed reducer, which comprises a speed reducing mechanism and a planetary roller screw mechanism, wherein the speed reducing mechanism comprises a speed reducing mechanism body and a speed reducing mechanism body;
the planetary roller screw mechanism comprises a screw rod, a nut and a plurality of rollers; the screw rod penetrates through the nut, and a plurality of rollers are arranged between the screw rod and the nut;
the speed reducing mechanism comprises a worm wheel and a worm; the worm is in meshed transmission with the worm wheel, and the worm wheel is coaxially connected with the nut.
In a further aspect of the present invention, the worm wheel is provided on an outer side surface of the nut.
As a further scheme of the invention, the staggered planetary roller screw speed reducer further comprises an output mechanism, wherein the output mechanism is connected with the end part of the screw rod and can only do linear motion under the driving of the screw rod.
As a further scheme of the invention, the output mechanism comprises a bearing sleeve, a bidirectional thrust ball bearing and an output shaft;
the bidirectional thrust ball bearing is positioned in the bearing sleeve and can rotate in the bearing sleeve; the output shaft is connected with the bearing sleeve, and one end of the output shaft is in contact with the bidirectional thrust ball bearing;
one end of the lead screw extends into the bearing sleeve to be connected with the bidirectional thrust ball bearing.
As a further scheme of the invention, one end of the lead screw is provided with a shaft diameter, and the shaft diameter is in interference fit with the bidirectional thrust ball bearing.
As a further scheme of the invention, the output mechanism further comprises a bearing positioning sleeve, and the bearing positioning sleeve is connected to the end part of the lead screw;
and a shaft shoulder is arranged on the shaft diameter, and the shaft shoulder and the bearing positioning sleeve are respectively pressed on two end surfaces of a shaft ring of the bidirectional thrust ball bearing.
As a further aspect of the present invention, the present invention further includes a first housing, wherein the output mechanism is located in the first housing;
and a guide mechanism is arranged between the bearing sleeve and the first shell, so that the output shaft can only linearly move along the axis direction of the output shaft.
As a further aspect of the present invention, the guide mechanism includes a guide key and a key groove;
the key groove is arranged on the inner side of the first shell and extends along the axial direction parallel to the output shaft;
the guide key is arranged on the outer side surface of the bearing sleeve and is in sliding fit with the key groove.
As a further aspect of the present invention, the present invention further includes a second housing, the second housing being in communication with the first housing;
the speed reducing mechanism is arranged in the second shell, and the planetary roller screw mechanism is positioned in the first shell.
By combining the technical scheme, the beneficial effects brought by the invention are analyzed as follows:
the invention provides an interlaced planetary roller screw speed reducer, which comprises a speed reducing mechanism and a planetary roller screw mechanism, wherein the speed reducing mechanism comprises a speed reducing mechanism body and a speed reducing mechanism body; the planetary roller screw mechanism comprises a screw rod, a nut and a plurality of rollers; the screw rod is arranged in the nut, and a plurality of rollers are arranged between the screw rod and the nut; the speed reducing mechanism comprises a worm wheel and a worm; the worm is in meshing transmission with the worm wheel, and the worm wheel is coaxially connected with the nut. When the staggered planetary roller screw speed reducer works, high-speed motion is input into the staggered planetary roller screw speed reducer through the worm, the worm drives the worm wheel to rotate to realize speed reduction, the speed reduction ratio of the worm wheel and the worm is large, the worm wheel drives the nut, the nut drives the screw to move at a low speed along the axial direction through the plurality of rollers, and then the staggered planetary roller screw speed reducer realizes the purpose of converting high rotating speed into axial low-speed motion of the output shaft.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an interleaved roller screw reducer according to an embodiment of the present invention;
FIG. 2 is a side view of an interleaved roller screw reduction gear provided in accordance with an embodiment of the present invention;
FIG. 3 is a schematic view of an interleaved roller screw reduction gear in accordance with an embodiment of the present invention with the first and second housings removed;
fig. 4 is a cross-sectional view of an interleaved roller screw reducer according to an embodiment of the present invention.
Icon: 10-a speed reduction mechanism; 11-a worm; 12-a worm gear; 20-a planetary roller screw mechanism; 21-a lead screw; 211-shoulder; 22-a nut; 23-a roller; 24-a limit retainer ring; 25-a cage; 30-an output mechanism; 31-a bearing sleeve; 32-bidirectional thrust ball bearing; 33-an output shaft; 34-a bearing locating sleeve; 40-a first housing; 50-a second housing; 60-a guide mechanism; 61-a guide key; 62-keyway.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides an interleaved planetary roller screw speed reducer, please refer to fig. 1 to 4 in the attached drawings of the specification together.
As shown in fig. 1 to 4, the staggered planetary roller screw reducer includes a reduction mechanism 10 and a planetary roller screw mechanism 20. The speed reduction mechanism 10 can convert an input high-speed motion into an output low-speed motion, and the planetary roller screw mechanism 20 can convert a rotary motion into an axial motion.
The planetary roller screw mechanism 20 includes a screw 21, a nut 22, and a plurality of rollers 23, the screw 21 penetrates the nut 22, and the plurality of rollers 23 are provided between the screw 21 and the nut 22. The output end of the speed reducing mechanism 10 is in transmission connection with a nut 22 of the planetary roller screw mechanism 20.
When the staggered planetary roller screw speed reducer works, high-speed motion is input from the speed reducing mechanism 10, the high-speed motion is reduced by the speed reducing mechanism 10 and then output to low-speed motion from the output end, the output end of the speed reducing mechanism 10 further drives the nut 22 of the planetary roller screw mechanism 20 to rotate, the nut 22 drives the screw 21 to axially move at low speed through the plurality of rollers 23, and then the staggered planetary roller screw speed reducer realizes the purpose of converting high rotating speed into axial low-speed motion of the output shaft 33.
Fig. 4 also shows a specific structure of the planetary roller screw mechanism 20, two cages 25 are arranged in the nut 22 at intervals, and two ends of the roller 23 are respectively arranged on the two cages 25; two limiting retainer rings 24 are further arranged in the nut 22, and the two limiting retainer rings 24 are respectively arranged on the outer sides of the two retainers 25 and play a limiting role in limiting the retainers 25.
Fig. 3 and 4 show one implementation mode of the speed reducing mechanism 10, wherein the speed reducing mechanism 10 comprises a worm wheel 12 and a worm 11, the worm 11 is in meshed transmission with the worm wheel 12, and the worm wheel 12 is coaxially connected with a nut 22. High-speed motion is input into the staggered planetary roller screw speed reducer through the worm 11, and the worm 11 drives the worm wheel 12 to rotate so as to realize speed reduction. Meanwhile, the worm wheel 12 and the worm 11 are meshed to reduce the speed, so that the speed reducing mechanism 10 has a large speed reducing ratio, and further has a small volume and a simple structure under the condition of the same speed reducing ratio.
As shown in fig. 3 and 4, the worm wheel 12 is provided on the outer surface of the nut 22 of the planetary roller screw mechanism 20. Specifically, the worm wheel 12 may be machined first, and then the worm wheel 12 is fixedly mounted on the outer side surface of the nut 22; the tooth form of the worm wheel 12 may be directly machined on the outer side surface of the nut 22.
Of course, the reduction mechanism 10 is not limited to the worm wheel 12 and worm 11 structure shown in fig. 3 and 4. For example, the speed reducing mechanism 10 may also be a parallel shaft type gear reducer, and the outer side surface of the nut 22 is provided with a gear, and the high-speed motion is transmitted by one or more gears to drive the gear on the nut 22 to rotate, so as to drive the nut 22 to rotate.
As shown in fig. 4, the staggered planetary roller screw reducer further includes an output mechanism 30, and the output mechanism 30 is connected to an end of the screw 21 and can only move linearly under the driving of the screw 21. When the screw of the planetary roller screw mechanism 20 moves in the axial direction, the screw 21 also rotates, and the output mechanism 30 can move only linearly without rotating.
Fig. 4 shows a specific structure of the output mechanism 30, and the output mechanism 30 includes a bearing sleeve 31, a bidirectional thrust ball bearing 32, and an output shaft 33. The two-way thrust ball bearing 32 is located within the bearing sleeve 31 and the two-way thrust ball bearing is able to rotate within the bearing sleeve 31, with the bearing sleeve 31 not rotating while the two-way thrust ball bearing 32 rotates within the bearing sleeve 31. One end of the screw 21 of the planetary roller screw mechanism 20 extends into the bearing sleeve 31 and is connected with the bidirectional thrust ball bearing 32. The output shaft 33 is connected to the bearing sleeve 31, and one end of the output shaft 33 is in contact with the bidirectional thrust ball bearing 32. When the nut 22 rotates to drive the screw 21 to rotate and move axially through the plurality of rollers 23, the end of the screw 21 drives the bidirectional thrust ball bearing 32 to rotate and drive the output shaft 33 and the bearing sleeve 31 to move axially.
With continued reference to fig. 4, one end of the lead screw 21 has a shaft diameter that is in interference fit with the bidirectional thrust ball bearing 32. Specifically, the bidirectional thrust ball bearing 32 has two races and a shaft ring, the two races are respectively located on both sides of the shaft ring, and a steel ball and a protection bracket are provided between the races and the shaft ring. The shaft diameter of the screw 21 is in interference fit with the shaft ring, so that the end of the screw 21 is firmly connected with the bidirectional thrust ball bearing 32, and the screw 21 can drive the output mechanism 30 to move in two axial directions.
With continued reference to fig. 4, the output mechanism 30 further includes a bearing retainer 34, the bearing retainer 34 being coupled to an end of the lead screw 21. A shaft shoulder 211 is arranged on the shaft diameter, and the shaft shoulder 211 and the bearing positioning sleeve 34 are respectively pressed on two end surfaces of a shaft ring of the bidirectional thrust ball bearing 32. Taking the direction in fig. 4 as an example, when the screw 21 moves to the right, the shoulder 211 of the screw 21 pushes the bidirectional thrust ball bearing 32 to move to the right, and further pushes the output mechanism 30 to move away from the planetary roller screw mechanism 20 as a whole; when the screw 21 moves leftwards, the bearing locating sleeve 34 at the end of the screw 21 pushes the bidirectional reasoning ball bearing to move leftwards, and then the output mechanism 30 is driven to move towards the direction close to the planetary roller screw mechanism 20 as a whole.
As shown in fig. 1 and 2, the staggered planetary roller screw reducer further includes a first housing 40, the output mechanism 30 is located in the first housing 40, a guide mechanism 60 is disposed between the bearing sleeve 31 and the first housing 40, and the guide mechanism 60 can limit the bearing sleeve 31 to rotate around its own axis, thereby further ensuring that the output shaft 33 only moves linearly along its own axis.
Wherein the guide mechanism 60 comprises a guide key 61 and a key way 62, as shown in fig. 2 to 4. The key groove 62 is opened on the inner side of the first housing 40 and extends in the axial direction parallel to the output shaft 33; the guide key 61 is disposed on the outer side surface of the bearing sleeve 31, extends into the key groove 62, and can slide in the key groove 62, and the side wall of the key groove 62 limits the rotation of the guide key 61 around the bearing sleeve 31, so as to prevent the rotation of the bearing sleeve 31 and the output shaft 33, and enable the bearing sleeve 31 and the output shaft 33 to move only along the axial direction.
Of course, the guide mechanism 60 is not limited to the guide key 61 and the key groove 62 shown in fig. 2 to 4. The guide mechanism 60 may have other configurations. For example, the guide mechanism 60 includes a guide pin provided on the bearing sleeve 31, and a guide long hole opened in the first housing 40, the guide long hole extending in an axial direction parallel to the output shaft 33, an end portion of the guide pin extending into the guide long hole.
As shown in fig. 1 and 2, the staggered planetary roller screw reducer further includes a second housing 50, the second housing 50 is communicated with the first housing 40, the speed reducing mechanism 10 is disposed in the second housing 50, the second housing 50 protects the speed reducing mechanism 10, the planetary roller screw mechanism 20 is disposed in the first housing 40, and the first housing 40 protects the planetary roller screw mechanism 20.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An interlaced planetary roller screw speed reducer is characterized by comprising a speed reducing mechanism and a planetary roller screw mechanism;
the planetary roller screw mechanism comprises a screw rod, a nut and a plurality of rollers; the screw rod penetrates through the nut, and a plurality of rollers are arranged between the screw rod and the nut;
the speed reducing mechanism comprises a worm wheel and a worm; the worm is in meshed transmission with the worm wheel, and the worm wheel is coaxially connected with the nut.
2. The staggered planetary roller screw reducer of claim 1, wherein the worm gear is disposed on an outer side surface of the nut.
3. The staggered planetary roller screw reducer of claim 1, further comprising an output mechanism connected to an end of the screw, the output mechanism being capable of only linear motion under the drive of the screw.
4. The interleaved planetary roller screw reduction gear according to claim 3, wherein the output mechanism comprises a bearing sleeve, a bidirectional thrust ball bearing and an output shaft;
the bidirectional thrust ball bearing is positioned in the bearing sleeve and can rotate in the bearing sleeve; the output shaft is connected with the bearing sleeve, and one end of the output shaft is in contact with the bidirectional thrust ball bearing;
one end of the lead screw extends into the bearing sleeve to be connected with the bidirectional thrust ball bearing.
5. The staggered planetary roller screw reducer of claim 4, wherein one end of the screw has a shaft diameter that is an interference fit with the bi-directional thrust ball bearing.
6. The interleaved planetary roller screw reducer according to claim 5, wherein the output mechanism further comprises a bearing retainer sleeve connected to an end of the screw;
and a shaft shoulder is arranged on the shaft diameter, and the shaft shoulder and the bearing positioning sleeve are respectively pressed on two end surfaces of a shaft ring of the bidirectional thrust ball bearing.
7. The interleaved planetary roller screw reduction gear according to claim 4, further comprising a first housing, the output mechanism being located within the first housing;
and a guide mechanism is arranged between the bearing sleeve and the first shell, so that the output shaft can only linearly move along the axis direction of the output shaft.
8. The interleaved planetary roller screw reduction gear according to claim 7, wherein the guiding mechanism comprises a guiding key and a key slot;
the key groove is arranged on the inner side of the first shell and extends along the axial direction parallel to the output shaft;
the guide key is arranged on the outer side surface of the bearing sleeve and is in sliding fit with the key groove.
9. The interleaved planetary roller screw reduction gear according to claim 7, further comprising a second housing in communication with the first housing;
the speed reducing mechanism is arranged in the second shell, and the planetary roller screw mechanism is positioned in the first shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013478.3A CN111022603B (en) | 2020-01-07 | 2020-01-07 | Staggered planetary roller screw speed reducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010013478.3A CN111022603B (en) | 2020-01-07 | 2020-01-07 | Staggered planetary roller screw speed reducer |
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| CN111022603A true CN111022603A (en) | 2020-04-17 |
| CN111022603B CN111022603B (en) | 2021-07-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010013478.3A Active CN111022603B (en) | 2020-01-07 | 2020-01-07 | Staggered planetary roller screw speed reducer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065943A (en) * | 2020-09-17 | 2020-12-11 | 西安索睿科技有限公司 | Linear motion speed synthesis mechanism |
| CN112855931A (en) * | 2021-01-25 | 2021-05-28 | 东北林业大学 | Tank door opening device based on planetary roller screw |
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| EP0369701A2 (en) * | 1988-11-14 | 1990-05-23 | Black & Decker Inc. | Thrust bearing arrangement for a power tool transmission |
| DE4136580A1 (en) * | 1991-11-07 | 1993-05-13 | Zeiss Carl Fa | Adjusting system for optical instrument - has tubular member moved axially by adjusting ring with ball screw thread |
| US20110193500A1 (en) * | 2010-02-05 | 2011-08-11 | Hitachi, Ltd. | Mechanism for converting rotary motion into linear motion and lifting device |
| CN203453408U (en) * | 2013-05-27 | 2014-02-26 | 成都福誉科技有限公司 | Self-locking elevating adjusting device with precision |
| CN104204455A (en) * | 2012-01-24 | 2014-12-10 | 戈梅克赛斯股份有限公司 | A reciprocating piston mechanism |
| US20170089435A1 (en) * | 2015-09-28 | 2017-03-30 | Moteck Electric Corp. | Safety linear actuator assembly |
| CN109854698A (en) * | 2019-01-16 | 2019-06-07 | 杭州新剑机器人技术股份有限公司 | Planetary roller screw pair transmission mechanism |
| CN110104581A (en) * | 2018-12-05 | 2019-08-09 | 哈尔滨工业大学 | A kind of spiral lift based on planetary roller screw |
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2020
- 2020-01-07 CN CN202010013478.3A patent/CN111022603B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1988001022A1 (en) * | 1986-07-29 | 1988-02-11 | Carding Specialists (Canada) Limited | A gas compressor or blower |
| EP0369701A2 (en) * | 1988-11-14 | 1990-05-23 | Black & Decker Inc. | Thrust bearing arrangement for a power tool transmission |
| DE4136580A1 (en) * | 1991-11-07 | 1993-05-13 | Zeiss Carl Fa | Adjusting system for optical instrument - has tubular member moved axially by adjusting ring with ball screw thread |
| US20110193500A1 (en) * | 2010-02-05 | 2011-08-11 | Hitachi, Ltd. | Mechanism for converting rotary motion into linear motion and lifting device |
| CN104204455A (en) * | 2012-01-24 | 2014-12-10 | 戈梅克赛斯股份有限公司 | A reciprocating piston mechanism |
| CN203453408U (en) * | 2013-05-27 | 2014-02-26 | 成都福誉科技有限公司 | Self-locking elevating adjusting device with precision |
| US20170089435A1 (en) * | 2015-09-28 | 2017-03-30 | Moteck Electric Corp. | Safety linear actuator assembly |
| CN110104581A (en) * | 2018-12-05 | 2019-08-09 | 哈尔滨工业大学 | A kind of spiral lift based on planetary roller screw |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112065943A (en) * | 2020-09-17 | 2020-12-11 | 西安索睿科技有限公司 | Linear motion speed synthesis mechanism |
| CN112855931A (en) * | 2021-01-25 | 2021-05-28 | 东北林业大学 | Tank door opening device based on planetary roller screw |
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| Publication number | Publication date |
|---|---|
| CN111022603B (en) | 2021-07-20 |
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