CN219282349U - Planetary roller screw pair convenient to assemble - Google Patents
Planetary roller screw pair convenient to assemble Download PDFInfo
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- CN219282349U CN219282349U CN202320733539.2U CN202320733539U CN219282349U CN 219282349 U CN219282349 U CN 219282349U CN 202320733539 U CN202320733539 U CN 202320733539U CN 219282349 U CN219282349 U CN 219282349U
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- cylindrical body
- roller
- retainer
- bearing
- screw pair
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides a planetary roller screw pair convenient to assemble, and belongs to the field of planetary roller screws. According to the utility model, the retainer replaces the functional design of the nut in the prior art, and the problem that the planetary roller screw pair is difficult to assemble in the prior art is solved. The planetary roller screw pair convenient to assemble comprises a retainer, rollers and a screw, wherein the rollers are rotatably arranged in the retainer, and the screw passes through the retainer and is meshed with the rollers; the side of the retainer is provided with a through groove, and the roller is rotatably arranged in the through groove; the rotation axis of the screw rod, the rotation axis of the roller and the central axis of the retainer are parallel to each other.
Description
Technical Field
The utility model belongs to the field of planetary roller screws, and particularly relates to a planetary roller screw pair convenient to assemble.
Background
In the prior art, a planetary roller screw pair generally comprises a screw, a nut, a bearing and a roller, wherein when the components are assembled into the roller screw pair, the roller is firstly assembled into the nut, then the bearing is assembled on the roller, and finally the roller is screwed into the screw, so that the roller is assembled into the nut and the screw is screwed into the nut and meshed with the roller by means of certain specific tools in the assembly process.
In some temporary production sites where planetary roller screw pairs are needed, tools needed for assembling the planetary roller screw pairs are not needed, and at the moment, all parts of the planetary roller screw pairs are needed to be assembled together quickly and manually, so that the existing planetary roller screw pairs cannot meet the requirements.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a planetary roller screw pair that is easy to assemble, and is used for solving the problem that the planetary roller screw pair is not easy to assemble in the prior art.
To achieve the above and other related objects, the present utility model provides a planetary roller screw pair which is convenient to assemble, comprising a cage, rollers and a screw, wherein the rollers are rotatably installed in the cage, and the screw passes through the cage and is meshed with the rollers;
the side of the retainer is provided with a through groove, and the roller is rotatably arranged in the through groove;
the rotation axis of the screw rod, the rotation axis of the roller and the central axis of the retainer are parallel to each other.
Optionally, a plurality of through grooves are formed in the side edge of the retainer, a plurality of rollers are arranged, and each through groove is internally provided with one roller in a rotating mode.
Optionally, the retainer includes a first cylindrical body, the side of the first cylindrical body is provided with the through groove, the center of the first cylindrical body is provided with a first through hole, and the screw rod passes through the first through hole and the roller is meshed.
Optionally, the retainer further includes a second cylindrical body and a third cylindrical body, the outer wall diameter of the second cylindrical body is larger than the outer wall diameter of the first cylindrical body and the outer wall diameter of the third cylindrical body, one end of the first cylindrical body is fixedly installed at one end of the second cylindrical body, one end of the third cylindrical body is fixedly installed at the other end of the second cylindrical body, and central axes of the first cylindrical body, the second cylindrical body and the third cylindrical body are collinear;
the first through hole penetrates through the centers of the first cylindrical body, the second cylindrical body and the third cylindrical body, and through grooves are formed in the side edges of the first cylindrical body and the side edges of the third cylindrical body.
Optionally, a counter bore is formed in the second cylinder.
Optionally, the roller bearing further comprises a first bearing, a first mounting hole is formed in the through groove, an outer ring of the first bearing is fixedly mounted in the first mounting hole, and the roller is in running fit with the first bearing.
Optionally, the roller bearing further comprises an end cover, the end cover is fixedly installed at one end of the retainer, one end of the roller is in running fit with the inner ring of the first bearing, the other end of the roller is in running fit with the end cover, a second through hole is formed in the end cover, and the screw rod penetrates through the second through hole and is meshed with the roller.
Optionally, the roller further comprises a second bearing, a second mounting hole is formed in the end cover, the second bearing is fixedly mounted in the second mounting hole, and the other end of the roller is in rotary fit with the second bearing.
Optionally, two end caps are respectively installed at two ends of the retainer.
Optionally, the first bearing and the second bearing are both angular contact ball bearings.
As described above, the planetary roller screw pair convenient to assemble has at least the following beneficial effects:
1. according to the planetary roller screw pair, the through groove is formed in the side edge of the retainer, the rollers are rotatably installed in the through groove, the screw rod penetrates through the retainer and the rollers to be meshed, the purpose that the retainer replaces a nut in the prior art is achieved, compared with the prior art, the rollers are installed in the nut by using a tool, and the rollers can be installed in the through groove of the retainer only by manual operation and meshed with the screw rod, so that the problem that the planetary roller screw pair is not easy to assemble in the prior art is solved.
2. According to the planetary roller screw pair, the design of the first cylindrical body, the second cylindrical body and the third cylindrical body is adopted, the design of double-row arrangement of the rollers is realized, the rollers which are arranged in double rows share the load in the transmission process, and the bearing capacity of the planetary roller screw pair is improved.
3. According to the roller bearing, the first bearing and the second bearing are designed by adopting the angular contact ball bearings, so that the roller can bear larger loads in the radial direction and the axial direction simultaneously.
Drawings
Fig. 1 shows a schematic view of a planetary roller screw pair of the present utility model which is convenient to assemble.
Fig. 2 shows a schematic view of the cage of the present utility model.
Fig. 3 shows a schematic view of a first bearing and a second bearing of the present utility model.
Description of element reference numerals
The retainer 1, the first cylindrical body 11, the second cylindrical body 12, the third cylindrical body 13, the through groove 14, the first through hole 15, the counter bore 16, the first mounting hole 17, the roller 2, the screw rod 3, the end cover 4, the second mounting hole 41, the second through hole 42, the first bearing 5, the second bearing 6 and the gasket 7.
Detailed Description
Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present utility model, which is described by the following specific examples.
Please refer to fig. 1 to 3. It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the utility model to the extent that it can be practiced, since modifications, changes in the proportions, or adjustments of the sizes, which are otherwise, used in the practice of the utility model, are included in the spirit and scope of the utility model which is otherwise, without departing from the spirit or scope thereof. Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
The following examples are given by way of illustration only. Various embodiments may be combined and are not limited to only what is presented in the following single embodiment.
Referring to fig. 1 and 2, the present utility model provides a planetary roller screw pair which is convenient to assemble, comprising a cage 1, rollers 2 and a screw 3, wherein the rollers 2 are rotatably installed in the cage 1, and the screw 3 passes through the cage 1 and is meshed with the rollers 2;
a through groove 14 is formed in the side edge of the retainer 1, and the roller 2 is rotatably arranged in the through groove 14;
the rotation axis of the screw rod 3, the rotation axis of the roller 2 and the central axis of the retainer 1 are parallel to each other;
the through groove 14 is formed in the side edge of the retainer 1, the roller 2 is rotatably installed in the through groove 14, the screw 3 penetrates through the retainer 1 and the roller 2 to be meshed, the purpose that the retainer 1 replaces the function of a nut in the prior art is achieved, compared with the fact that a tool is used for installing the roller 2 into the nut, the roller 2 can be installed in the through groove 14 of the retainer 1 and meshed with the screw 3 only by manual operation, and therefore the problem that a planetary roller screw pair is difficult to assemble in the prior art is solved.
In this embodiment, referring to fig. 2, a plurality of through grooves 14 are formed on the side of the cage 1, a plurality of rollers 2 are rotatably installed in each through groove 14, and the plurality of rollers 2 can disperse the load applied to the cage 1, so as to improve the bearing capacity of the whole planetary roller screw pair.
In this embodiment, referring to fig. 1 and 2, the retainer 1 includes a first cylindrical body 11, the side edge of the first cylindrical body 11 is provided with the through groove 14, the center of the first cylindrical body 11 is provided with the first through hole 15, the lead screw 3 passes through the first through hole 15 and is meshed with the roller 2, and the shape of the retainer 1 is cylindrical and is suitable for most production scenarios, or other suitable shapes can be selected according to the requirement of field production.
Referring to fig. 1 and 2, the retainer 1 further includes a second cylindrical body 12 and a third cylindrical body 13, wherein the diameter of the outer wall of the second cylindrical body 12 is larger than the diameter of the outer wall of the first cylindrical body 11 and the diameter of the outer wall of the third cylindrical body 13, one end of the first cylindrical body 11 is fixedly installed at one end of the second cylindrical body 12, one end of the third cylindrical body 13 is fixedly installed at the other end of the second cylindrical body 12, and the central axes of the first cylindrical body 11, the second cylindrical body 12 and the third cylindrical body 13 are collinear;
the first through hole 15 penetrates through the centers of the first cylindrical body 11, the second cylindrical body 12 and the third cylindrical body 13, and through grooves 14 are formed in the side edges of the first cylindrical body 11 and the third cylindrical body 13;
by means of the design of the first cylindrical body 11, the second cylindrical body 12 and the third cylindrical body 13, the double-row arrangement design of the rollers 2 is achieved, the rollers 2 in double-row arrangement share the load born by the retainer 1 in the transmission process, and the bearing capacity of the planetary roller screw pair is improved.
In this embodiment, referring to fig. 2, the second cylinder 12 is provided with a counter bore 16, and the purpose of the counter bore 16 is to facilitate the installation of the load on the retainer 1, so that the planetary roller screw pair is convenient to use, and of course, the counter bore 16 is not necessarily provided, and other manners of facilitating the installation of the load may be designed.
Referring to fig. 2 and 3, the planetary roller screw pair further includes a first bearing 5, a first mounting hole 17 is formed in the through groove 14, an outer ring of the first bearing 5 is in interference fit with an inner wall of the first mounting hole 17, one end of the roller 2 is in running fit with an inner ring of the first bearing 5, and a specific form of running fit between the roller 2 and the retainer 1 is provided, and a bearing is selected as a relatively common technical form.
In this embodiment, referring to fig. 2, the planetary roller screw pair further includes an end cover 4, the end cover 4 is fixedly mounted at one end of the retainer 1, the other end of the roller 2 is in running fit with the end cover 4, a second through hole 42 is formed in the end cover 4, the screw 3 passes through the second through hole 42 and is meshed with the roller 2, and the design of the end cover 4 ensures stable transmission of the planetary roller screw pair.
In this embodiment, referring to fig. 2 and 3, the planetary roller screw pair further includes a second bearing 6, the end cover 4 is provided with a second mounting hole 41, the outer ring of the second bearing 6 is in interference fit with the inner wall of the second mounting hole 41, the other end of the roller 2 is in running fit with the inner ring of the second bearing 6, and the purpose of designing the second mounting hole 41 and the second bearing 6 is to ensure smooth transmission of the planetary roller screw pair as a whole.
In this embodiment, referring to fig. 2, two end caps 4 are provided, and the two end caps 4 are respectively mounted at two ends of the cage 1, so that the reliability of the planetary roller screw pair is further improved due to the design of the two end caps 4.
In this embodiment, referring to fig. 3, the first bearing 5 and the second bearing 6 are both angular contact ball bearings, and the angular contact ball bearings have the following advantages: (1) the structure is simple, (2) the limit rotation speed is higher, (3) the friction moment is smaller, (4) the radial load and the axial load can be borne simultaneously, (5) the dynamic load capacity and the static load capacity are large, and (6) the rotation precision is high and the noise is low.
In this embodiment, referring to fig. 3, the planetary roller screw pair further includes a plurality of shims 7, one of the shims 7 is installed between the first bearings 5 of the rollers 2, and the other of the shims 7 is installed between the rollers 2 and the second bearings 6.
Referring to fig. 1 to 3, the assembling method of the planetary roller screw pair for convenient assembly according to the present utility model includes the following steps:
and (3) installing a bearing: the first bearing 5 and the second bearing 6, namely a plurality of selected angular contact ball bearings, are respectively installed in the second installation holes 41 in the first installation holes 17, so that the outer ring of the angular contact ball bearings is in interference fit with the inner wall of the first installation holes 17, and the outer ring of the angular contact ball bearings is in interference fit with the inner wall of the second installation holes 41;
mounting a roller 2: mounting a certain number of the shims 7 on both ends of one of the rollers 2, and then rotatably mounting one end thereof and the inner ring of the first bearing 5 together;
and (4) installing an end cover 4: rotatably mounting the inner ring of the second bearing 6 and the other end of the roller 2 in the second mounting hole 41 on the end cap 4 together;
screwing a screw rod 3: screwing the screw 3 into the first through hole 15 and the second through hole 42, wherein the central axes of the first through hole 15 and the second through hole 42 are collinear, and the meshing position of the roller 2 and the screw 3 is adjusted by using an adjusting gasket 7;
fixing end cap 4: the end of one of the end caps 4 and the end of the first cylindrical body 11 are fixedly mounted together using screws, and the other of the end caps 4 and the end of the second cylindrical body 12 are fixedly mounted together using screws.
In summary, according to the planetary roller screw pair convenient to assemble, the through groove 14 is formed in the side edge of the retainer 1, the roller 2 is rotatably installed in the through groove 14, the screw 3 passes through the retainer 1 and is meshed with the roller 2, so that the purpose that the retainer 1 replaces the nut in the prior art is achieved, compared with the prior art that the roller 2 is installed in the nut by using a tool, the roller 2 can be installed in the through groove 14 of the retainer 1 and meshed with the screw 3 only by manual operation, and the problem that the planetary roller screw pair is difficult to assemble in the prior art is solved; meanwhile, through the design of the first cylindrical body 11, the second cylindrical body 12 and the third cylindrical body 13, the double-row arrangement design of the rollers 2 is realized, the rollers 2 in double-row arrangement share the load in the transmission process, and the bearing capacity of the planetary roller screw pair is improved; the design of the angular contact ball bearings is adopted for the first bearing 5 and the second bearing 6, so that the roller 2 can bear larger loads in the radial direction and the axial direction simultaneously. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
Claims (10)
1. Planetary roller screw pair convenient to assembly, its characterized in that: the device comprises a retainer, rollers and a screw rod, wherein the rollers are rotatably installed in the retainer, and the screw rod passes through the retainer and is meshed with the rollers;
the side of the retainer is provided with a through groove, and the roller is rotatably arranged in the through groove;
the rotation axis of the screw rod, the rotation axis of the roller and the central axis of the retainer are parallel to each other.
2. The planetary roller screw pair convenient to assemble according to claim 1, wherein: the side of holder has seted up a plurality of grooves that run through, the roller has a plurality ofly, every run through the inslot and all rotate and install one the roller.
3. The planetary roller screw pair convenient to assemble according to claim 2, wherein: the retainer comprises a first cylindrical body, the side edge of the first cylindrical body is provided with the penetrating groove, the center of the first cylindrical body is provided with a first through hole, and the screw rod penetrates through the first through hole and is meshed with the roller.
4. A planetary roller screw assembly for easy assembly according to claim 3, wherein: the retainer further comprises a second cylindrical body and a third cylindrical body, wherein the diameter of the outer wall of the second cylindrical body is larger than that of the outer wall of the first cylindrical body and that of the outer wall of the third cylindrical body, one end of the first cylindrical body is fixedly arranged at one end of the second cylindrical body, one end of the third cylindrical body is fixedly arranged at the other end of the second cylindrical body, and the central axes of the first cylindrical body, the second cylindrical body and the third cylindrical body are collinear;
the first through hole penetrates through the centers of the first cylindrical body, the second cylindrical body and the third cylindrical body, and through grooves are formed in the side edges of the first cylindrical body and the side edges of the third cylindrical body.
5. The planetary roller screw pair convenient to assemble according to claim 4, wherein: and a counter bore is formed in the second cylinder.
6. The planetary roller screw pair convenient to assemble according to claim 1, wherein: the roller is in running fit with the first bearing.
7. The planetary roller screw pair convenient to assemble according to claim 6, wherein: the novel roller bearing comprises a retainer, and is characterized by further comprising an end cover, wherein the end cover is fixedly arranged at one end of the retainer, one end of a roller is in running fit with the inner ring of the first bearing, the other end of the roller is in running fit with the end cover, a second through hole is formed in the end cover, and a screw rod penetrates through the second through hole and is meshed with the roller.
8. The planetary roller screw pair convenient to assemble as claimed in claim 7, wherein: the roller is characterized by further comprising a second bearing, a second mounting hole is formed in the end cover, the second bearing is fixedly mounted in the second mounting hole, and the other end of the roller is in rotary fit with the second bearing.
9. The planetary roller screw pair convenient to assemble as claimed in claim 7, wherein: the two end covers are respectively arranged at the two ends of the retainer.
10. The planetary roller screw pair convenient to assemble according to claim 8, wherein: the first bearing and the second bearing are both angular contact ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320733539.2U CN219282349U (en) | 2023-04-06 | 2023-04-06 | Planetary roller screw pair convenient to assemble |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320733539.2U CN219282349U (en) | 2023-04-06 | 2023-04-06 | Planetary roller screw pair convenient to assemble |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219282349U true CN219282349U (en) | 2023-06-30 |
Family
ID=86907237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320733539.2U Active CN219282349U (en) | 2023-04-06 | 2023-04-06 | Planetary roller screw pair convenient to assemble |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219282349U (en) |
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2023
- 2023-04-06 CN CN202320733539.2U patent/CN219282349U/en active Active
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