CN115111335B - Micro lead differential type planetary roller screw, assembly tool and assembly method - Google Patents
Micro lead differential type planetary roller screw, assembly tool and assembly method Download PDFInfo
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- CN115111335B CN115111335B CN202211027851.6A CN202211027851A CN115111335B CN 115111335 B CN115111335 B CN 115111335B CN 202211027851 A CN202211027851 A CN 202211027851A CN 115111335 B CN115111335 B CN 115111335B
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- roller
- nut
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- retainer
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B11/00—Work holders not covered by any preceding group in the subclass, e.g. magnetic work holders, vacuum work holders
- B25B11/02—Assembly jigs
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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
Abstract
The application discloses little helical pitch differential type planet roller lead screw, which comprises a nut, the lead screw, holder and roller, the lead screw is worn to establish in the nut, the roller has a plurality ofly and is located between lead screw and the nut, the holder is installed on the nut, with each roller cooperation, the inside wall of nut has first ring tooth district, the lateral wall of lead screw has first helical tooth district, the lateral wall of roller has second ring tooth district and second helical tooth district, the second ring tooth district of roller meshes with the first ring tooth district of nut, the second helical tooth district of roller meshes with the first helical tooth district meshing of lead screw. The meshing part of the roller and the nut still adopts a ring tooth structure, so that the axial displacement of the roller and the nut can be ensured to be 0; the matching part of the roller and the screw rod does not adopt a ring tooth structure but a spiral tooth structure, and compared with the existing differential type planetary roller screw rod, the lead is reduced, so that the application range is widened to the field of micro leads.
Description
Technical Field
The invention relates to the field of roller screws, in particular to a micro lead differential type planetary roller screw, an assembly tool and an assembly method.
Background
The differential planetary roller screw mainly comprises a screw rod, a roller, a nut and a retainer, wherein the screw teeth of the roller of the existing differential planetary roller screw are annular grooves, and the screw teeth of the nut are also annular grooves, namely the screw teeth of the roller of the differential planetary roller screw are 0 in helix angle and are individually annular teeth, and the differential effect is generated by the structure. Through the reasonable design of the pitch diameter of the roller and the pitch diameter of the lead screw, the lead of the assembly is smaller than the lead of the lead screw, namely, a differential effect can be generated. However, this differential effect is limited and typically can only be reduced by around 25% of the lead, for example, a lead of 1mm for a lead screw, and a lead of 0.75mm for that assembly. Current designs do not achieve this if a smaller lead is required, such as a small lead of 0.1mm, 0.05mm.
Disclosure of Invention
The invention provides a micro lead differential type planetary roller screw, an assembly tool and an assembly method aiming at the problems.
The technical scheme adopted by the invention is as follows:
the utility model provides a little helical pitch differential type planet roller screw, includes nut, lead screw, holder and roller, the lead screw is worn to establish in the nut, the roller has a plurality ofly and is located between lead screw and the nut, the holder is installed on the nut, with each roller cooperation, the inside wall of nut has first ring tooth district, the lateral wall of lead screw has first helical tooth district, the lateral wall of roller has second ring tooth district and second helical tooth district, the second ring tooth district of roller meshes with the first ring tooth district of nut, the second helical tooth district of roller with the first helical tooth district meshing of lead screw.
The meshing part of the roller and the nut still adopts a ring tooth structure, so that the axial displacement of the roller and the nut can be ensured to be 0; the matching part of the roller and the screw rod does not adopt a ring tooth structure but a spiral tooth structure, and compared with the existing differential type planetary roller screw rod, the lead is reduced, so that the application range is widened to the field of micro leads.
If the existing differential type planetary roller screw needs to reach a micro lead, the lead of the screw can only be reduced, the tooth thickness of the screw can also be reduced along with the reduction of the lead of the screw, great processing difficulty can be caused, the strength of the screw can also be reduced, and the bearing capacity of the differential type planetary roller screw assembly is reduced. In the application, due to a reasonable meshing principle, the screw pitch of the screw rod, the nut and the roller can be kept in a conventional range (larger than 1 mm), the processing difficulty of the screw rod, the roller and the nut can be reduced, the strength of the screw teeth and the bearing capacity of an assembly can be well guaranteed, and the bearing capacity can be kept consistent with that of a conventional differential planetary roller screw.
By fine lead is meant a lead that is less than conventional, such as less than 0.75mm, and further such as less than 0.1mm.
In one embodiment of the present invention, the spiral direction of the spiral line of the first spiral tooth area of the screw is opposite to the spiral direction of the spiral line of the second spiral tooth area of the roller, so as to achieve the effect of further reducing the lead, and achieve the lead which can be close to 0.
In one embodiment of the present invention, there are two second annular gear areas, the second helical gear area is located between the two second annular gear areas, there are two first annular gear areas, and the two first annular gear areas and the two second annular gear areas are engaged with each other in a one-to-one correspondence manner. Better stress effect and reliability can be guaranteed by the arrangement.
In one embodiment of the present invention, the retainer has an avoidance hole for the screw to pass through and a plurality of positioning holes for the end portions of the rollers to pass through, and two groups of the retainers are respectively sleeved at two ends of the nut.
In one embodiment of the present invention, at least one end of the roller has a first locating feature.
The roller meshes with the lead screw for the helical tooth meshing, therefore the relative position relation of roller and lead screw need strictly guarantee, through set up first location structure at the tip of roller, the convenience with correspond the frock cooperation when the assembly, guarantee that the position of roller is accurate.
In one embodiment of the present invention, a limiting protrusion is provided in the nut, and one end of the retainer is engaged with the limiting protrusion;
the micro lead differential type planetary roller screw further comprises an anti-disengaging piece arranged on the nut, and the anti-disengaging piece is matched with the retainer, so that the retainer is limited between the limiting convex part and the anti-disengaging piece, and the anti-disengaging piece is prevented from disengaging from the outer side of the nut.
In practice, the anti-slip part can adopt various structures, such as a structural part fixed with a nut. In one embodiment of the present invention, the anti-release member is a snap spring disposed in the nut.
The application also discloses assembly fixture for assemble the above little helical pitch differential type planet roller lead screw, assembly fixture includes the body, and one side of body has the holding post, have on the holding post with roller complex holding groove, still have on the body around keeping post axis interval distribution's second location structure, second location structure be used for with the first location structure cooperation of roller, inject the circumferential position of roller.
When the roller is rotated to the position where the second positioning structure corresponds to the first positioning structure of the roller, the roller is positioned and can not rotate any more, the lead screw can be screwed in at the moment, and the lead screw is ensured to be accurately meshed with each roller.
In practice, it is preferable that the holding groove has a circular arc shape.
In one embodiment of the present invention, the body has a boss for extending into the nut, and the second positioning structure is located on the boss;
the first positioning structure is a positioning groove arranged on the end face of the roller, and the second positioning structure is a positioning block, or the first positioning structure is a positioning block arranged on the end face of the roller, and the second positioning structure is a positioning groove.
The boss inserted into the nut is arranged, so that the self-positioning of the assembly tool is facilitated, and the retaining column is ensured to be positioned in the middle of the nut.
The present application also discloses a method of assembling a micro lead differential planetary roller screw for assembling the above micro lead differential planetary roller screw, one end of the roller having a first locating structure, the method of assembling comprising the steps of:
inserting one end of each roller, which is not provided with the first positioning structure, into a first retainer, and installing the first retainer and a first clamp spring in the nut;
the assembling tool is arranged in the nut, so that the holding grooves of the holding columns are matched with the corresponding roller, and the relative position of the roller and the nut is kept;
the assembly tool is made to face downwards, then the roller is rotated, the first positioning structure of the roller is aligned with the second positioning structure on the assembly tool, and the roller is circumferentially positioned after moving downwards;
screwing the screw rod into the roller to enable the screw rod to form a meshing relation with all the rollers;
and (4) moving out the assembly tool, and then loading the second retainer and the second clamp spring into the nut.
The beneficial effects of the invention are: the roller and the screw rod matching part do not adopt a ring tooth structure but a spiral tooth structure, and compared with the existing differential type planetary roller screw rod, the lead is reduced, so that the application range is widened to the field of micro leads.
Drawings
FIG. 1 is a cross-sectional view of a fine lead differential planetary roller screw;
FIG. 2 is a front view of the fine lead differential planetary roller screw with the nut hidden;
FIG. 3 is an exploded view of a fine lead differential planetary roller screw;
FIG. 4 is a schematic view of an assembly fixture;
FIG. 5 is a schematic illustration of step 1 of the assembly method;
FIG. 6 is a schematic illustration of step 3 of the assembly method;
fig. 7 is a schematic structural view of a fine lead differential planetary roller screw.
The various reference numbers in the figures are:
1. a nut; 11. a first annulus gear region; 12. a limit convex part; 2. a lead screw; 21. a first helical tooth zone; 3. a holder; 31. avoiding holes; 32. positioning holes; 4. a roller; 41. a second ring gear region; 42. a second helical tooth region; 43. a first positioning structure; 5. a drop-off prevention member; 6. assembling a tool; 61. a body; 62. a holding column; 621. a holding recess; 63. a boss; 631. a second positioning structure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
In the description of the present application, it should be noted that the terms "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the products of the application usually place when using, and are only used for convenience in describing the present application and simplifying the description, but do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present application, it should also be noted that, unless expressly stated or limited otherwise, the terms "disposed" and "connected" are to be construed broadly, and may for example be 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1, 2, 3 and 7, a planetary roller screw with a differential lead of a small lead comprises a nut 1, a screw 2, a retainer 3 and rollers 4, wherein the screw 2 is inserted into the nut 1, a plurality of rollers 4 are arranged between the screw 2 and the nut 1, the retainer 3 is arranged on the nut 1 and is matched with each roller 4, the inner side wall of the nut 1 is provided with a first annular tooth area 11, the outer side wall of the screw 2 is provided with a first spiral tooth area 21, the outer side wall of each roller 4 is provided with a second annular tooth area 41 and a second spiral tooth area 42, the second annular tooth area 41 of each roller 4 is meshed with the first annular tooth area 11 of the nut 1, and the second spiral tooth area 42 of each roller 4 is meshed with the first spiral tooth area 21 of the screw 2.
According to the invention, the meshing part of the roller 4 and the nut 1 still adopts a ring tooth structure, so that the axial displacement of the roller 4 and the nut 1 can be ensured to be 0; the matching part of the roller 4 and the screw rod 2 does not adopt a ring tooth structure but a spiral tooth structure, and compared with the existing differential type planetary roller 4 screw rod 2, the lead is reduced, so that the application range is widened to the field of micro leads.
If the existing differential type planet roller 4 screw 2 needs to reach a micro lead, the lead of the screw 2 can only be reduced, along with the reduction of the lead of the screw 2, the tooth thickness of the screw teeth can also be reduced, great processing difficulty can be caused, the strength of the screw teeth can also be reduced, and the bearing capacity of the differential type planet roller 4 screw 2 assembly is reduced. In the application, due to a reasonable meshing principle, the screw pitches of the screw rod 2, the nut 1 and the roller 4 can be kept within a conventional range (larger than 1 mm), the processing difficulty of the screw rod 2, the roller 4 and the nut 1 can be reduced, the thread strength and the bearing capacity of an assembly can be well ensured, and the bearing capacity can be kept consistent with that of the conventional differential type planetary roller 4 screw rod 2.
By fine lead is meant less than conventional lead, such as less than 0.75mm, and further such as less than 0.1mm.
In this embodiment, the spiral direction of the spiral line of the first spiral tooth zone 21 of the screw 2 is opposite to the spiral direction of the spiral line of the second spiral tooth zone 42 of the roller 4, so as to achieve the effect of further reducing the lead, and achieve the lead which can be close to 0.
If the first helical tooth region 21 is a left-hand thread, the second helical tooth region 42 is a right-hand thread, and if the first helical tooth region 21 is a right-hand thread, the second helical tooth region 42 is a left-hand thread; the pitch of the meshed part of the roller 4 and the screw rod 2 is required to be consistent with that of the screw rod 2, the pitch of the meshed part of the roller 4 and the nut 1 is required to be consistent with that of the nut 1, and the pitch of the screw rod 2 and that of the nut 1 can be inconsistent.
As shown in fig. 1, 2 and 3, in the present embodiment, there are two second ring gear regions 41, the second helical gear region 42 is located between the two second ring gear regions 41, there are two first ring gear regions 11, and the two first ring gear regions 11 and the two second ring gear regions 41 mesh with each other in a one-to-one correspondence. The arrangement can ensure better stress effect and reliability.
As shown in fig. 1, in this embodiment, the retainer 3 has an avoiding hole 31 for the lead screw 2 to pass through and a plurality of positioning holes 32 for the end portions of the rollers 4 to pass through, and two sets of the retainers 3 are respectively sleeved at two ends of the nut 1.
As shown in fig. 5, in this embodiment, the end of the roller 4 has a first detent 43. In practice, both ends can be arranged.
The roller 4 meshes with the lead screw 2 for the helical tooth meshing, therefore the relative position relation of roller 4 and lead screw 2 needs strict assurance, through set up first location structure 43 at the tip of roller 4, the convenience with correspond the frock cooperation when the assembly, guarantee that the position of roller 4 is accurate.
As shown in fig. 1, in the present embodiment, a limiting protrusion 12 is provided in the nut 1, and one end of the retainer 3 is engaged with the limiting protrusion 12;
the micro lead differential type planetary roller screw further comprises a separation preventing part 5 installed on the nut 1, wherein the separation preventing part 5 is matched with the retainer 3, so that the retainer 3 is limited between the limiting convex part 12 and the separation preventing part 5, and the separation preventing part 5 is prevented from separating towards the outer side of the nut 1.
In practice, the anti-slip member 5 may adopt various structures, such as a structural member fixed to the nut 1. In this embodiment, the anti-release member 5 is a snap spring disposed in the nut 1.
Because the roller 4 is meshed with the screw rod 2 through spiral teeth, the roller 4 has a position relation in the assembling process, and if the self-generated position of the roller 4 is inaccurate, the roller interferes with the spiral teeth of the screw rod 2, so that the screw rod 2 cannot be screwed in, and the assembling cannot be finished. In order to ensure the normal assembly, the present embodiment uses the assembly tool 6 having the second positioning structure 631 whose position is consistent with the first positioning structure 43 of each roller 4 to perform the assembly, so as to determine the assembly position of the roller 4 for the purpose of assembly. As shown in fig. 4, the assembly fixture 6 of the present embodiment includes a body 61, a holding post 62 is provided on one side of the body 61, the holding post 62 has a holding groove 621 engaged with the roller 4, the body 61 further has second positioning structures 631 spaced around the axis of the holding post 62, and the second positioning structures 631 are configured to cooperate with the first positioning structures 43 of the roller 4 to define the circumferential position of the roller 4.
When the nut is used, the retaining columns 62 of the assembling tool 6 are inserted into the nut 1, the rollers 4 correspond to the corresponding retaining grooves 621, the relative positions of the rollers 4 and the nut 1 are maintained through the retaining grooves 621 (at the moment, the rollers 4 can rotate around the axes of the rollers 4), the rollers 4 are rotated, when the rollers 4 rotate until the second positioning structures 631 correspond to the first positioning structures 43 of the rollers 4, the rollers 4 are positioned at the moment and cannot rotate any more, at the moment, the screw rod 2 can be screwed in, and the screw rod 2 is enabled to be accurately meshed with the rollers 4.
In this embodiment, it is preferable that the holding groove 621 is formed in a circular arc shape.
In this embodiment, the body 61 has a boss 63 for extending into the nut 1, and the second positioning structure 631 is located on the boss 63. The boss 63 of the insert nut 1 is arranged, so that the self-positioning of the assembly tool is facilitated, and the retaining column 62 is located in the middle of the nut 1.
In this embodiment, the first positioning structure 43 is a positioning groove disposed on the end surface of the roller 4, and the second positioning structure 631 is a positioning block. In other embodiments, the first positioning structure 43 may be a positioning block disposed on the end surface of the roller 4, and the second positioning structure 631 may be a positioning groove.
The embodiment also discloses an assembling method for assembling the micro-lead differential type planetary roller screw according to the embodiment by using the assembling tool 6 according to the embodiment, which comprises the following steps:
1. inserting one end of each roller 4, which is not provided with the first positioning structure 43, into the first retainer 3, and installing the first retainer 3 and the first snap spring in the nut 1;
2. the assembling tool 6 is arranged in the nut 1, so that the holding grooves 621 of the holding columns 62 are matched with the corresponding rollers 4 to keep the relative positions of the rollers 4 and the nut 1;
3. the assembly tool 6 is made to face downwards, then the roller 4 is rotated, the first positioning structure 43 of the roller 4 is aligned with the second positioning structure 631 on the assembly tool 6 (the positioning groove is aligned with the positioning block), the roller 4 can move downwards under the action of self gravity, and the roller 4 is circumferentially positioned after moving downwards;
4. screwing the screw rod 2 in to enable the screw rod 2 to form a meshing relation with all the rollers 4;
5. and (4) removing the assembly tool 6, and then installing the second retainer 3 and the second clamp spring into the nut 1.
The above description is only for the preferred embodiment of the present invention and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings can be directly or indirectly applied to other related technical fields and are included in the scope of the present invention.
Claims (7)
1. An assembly tool, which is used for assembling a micro lead differential type planetary roller screw, wherein the micro lead differential type planetary roller screw comprises a nut, a screw rod, a retainer and rollers, the screw rod is arranged in the nut in a penetrating way, the rollers are provided with a plurality of rollers and are positioned between the screw rod and the nut, the retainer is arranged on the nut and is matched with each roller, the inner side wall of the nut is provided with a first annular tooth area, the outer side wall of the screw rod is provided with a first spiral tooth area, the outer side wall of each roller is provided with a second annular tooth area and a second spiral tooth area, the second annular tooth area of each roller is meshed with the first annular tooth area of the nut, and the second spiral tooth area of each roller is meshed with the first spiral tooth area of the screw rod; the retainer is provided with avoidance holes for the lead screw to pass through and positioning holes for the end parts of the roller to pass through, and the two groups of retainers are respectively sleeved at the two ends of the nut in an inner mode; at least one end of the roller has a first locating feature;
the assembling tool comprises a body, wherein a retaining column is arranged on one side of the body, retaining grooves matched with the roller are formed in the retaining column, second positioning structures distributed around the axis of the retaining column at intervals are further arranged on the body, and the second positioning structures are used for being matched with the first positioning structures of the roller to limit the circumferential position of the roller.
2. The assembly tooling of claim 1, wherein the body has a boss for extending into the interior of the nut, the second locating feature being located on the boss;
the first positioning structure is a positioning groove arranged on the end face of the roller, and the second positioning structure is a positioning block, or the first positioning structure is a positioning block arranged on the end face of the roller, and the second positioning structure is a positioning groove.
3. The assembly fixture of claim 1, wherein the helix of the first helical tooth zone of the lead screw has a direction opposite to the helix of the second helical tooth zone of the roller to further reduce the lead.
4. The assembly tooling of claim 1, wherein there are two of the second annular gear areas, the second helical gear area is located between the two second annular gear areas, there are two of the first annular gear areas, and the two first annular gear areas and the two second annular gear areas are in one-to-one correspondence meshing engagement.
5. The assembly tool according to claim 1, wherein a limiting convex part is arranged in the nut, and one end of the retainer is matched with the limiting convex part;
the micro lead differential type planetary roller screw further comprises an anti-release piece arranged on the nut, and the anti-release piece is matched with the retainer, so that the retainer is limited between the limiting convex part and the anti-release piece, and the anti-release piece is prevented from being separated from the outer side of the nut.
6. The assembly tool according to claim 5, wherein the anti-release piece is a snap spring arranged in the nut.
7. A method of assembling a micro-lead differential planetary roller screw, wherein the micro-lead differential planetary roller screw is assembled by the assembling tool of claim 6, and one end portion of the roller has a first positioning structure, the method comprising the steps of:
inserting one end of each roller, which is not provided with the first positioning structure, into the first retainer, and installing the first retainer and the first clamp spring in the nut;
the assembling tool is arranged in the nut, so that the holding grooves of the holding columns are matched with the corresponding roller, and the relative position of the roller and the nut is kept;
the assembly tool is made to face downwards, then the roller is rotated, the first positioning structure of the roller is aligned with the second positioning structure on the assembly tool, and the roller is circumferentially positioned after moving downwards;
screwing the screw rod into the roller to enable the screw rod to form a meshing relation with all the rollers;
and (4) moving out the assembly tool, and then loading the second retainer and the second clamp spring into the nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211027851.6A CN115111335B (en) | 2022-08-25 | 2022-08-25 | Micro lead differential type planetary roller screw, assembly tool and assembly method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211027851.6A CN115111335B (en) | 2022-08-25 | 2022-08-25 | Micro lead differential type planetary roller screw, assembly tool and assembly method |
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| CN115111335A CN115111335A (en) | 2022-09-27 |
| CN115111335B true CN115111335B (en) | 2022-12-16 |
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| CN115853985A (en) * | 2023-02-22 | 2023-03-28 | 杭州新剑机电传动股份有限公司 | Planetary roller screw pair capable of realizing bidirectional self-locking |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2026136A1 (en) * | 1968-12-13 | 1970-09-11 | Heidenstam Erik | |
| DE102011106079A1 (en) * | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Planetary screw drive with end seal with single sealing edge |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007056993A (en) * | 2005-08-24 | 2007-03-08 | Nsk Ltd | Planetary roller screw device |
| DE102015204587B4 (en) * | 2015-03-13 | 2016-11-10 | Schaeffler Technologies AG & Co. KG | Planetary roller screw (PWG) |
| CN113251124A (en) * | 2020-06-16 | 2021-08-13 | 杭州新剑机器人技术股份有限公司 | Asymmetric differential type planetary roller screw device and actuator comprising same |
| CN112049907A (en) * | 2020-09-18 | 2020-12-08 | 中国船舶重工集团公司第七0四研究所 | Ring gear nut planet roller screw |
| CN114321309A (en) * | 2021-12-27 | 2022-04-12 | 李桐谋 | Roller screw structure with micro lead |
| CN114321312B (en) * | 2022-03-14 | 2022-06-14 | 西安索睿科技有限公司 | Differential planetary roller screw pair, assembly tool and assembly process |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2026136A1 (en) * | 1968-12-13 | 1970-09-11 | Heidenstam Erik | |
| DE102011106079A1 (en) * | 2011-06-30 | 2013-01-03 | Robert Bosch Gmbh | Planetary screw drive with end seal with single sealing edge |
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| CN115111335A (en) | 2022-09-27 |
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