CN103441607A - Inner anti-rotating mechanism of electric cylinder with rectangular cylinder body - Google Patents
Inner anti-rotating mechanism of electric cylinder with rectangular cylinder body Download PDFInfo
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- CN103441607A CN103441607A CN2013103390527A CN201310339052A CN103441607A CN 103441607 A CN103441607 A CN 103441607A CN 2013103390527 A CN2013103390527 A CN 2013103390527A CN 201310339052 A CN201310339052 A CN 201310339052A CN 103441607 A CN103441607 A CN 103441607A
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Abstract
The invention discloses an inner anti-rotating mechanism of an electric cylinder with a rectangular cylinder body. The inner anti-rotating mechanism of the electric cylinder with the rectangular cylinder body comprises an inner anti-rotating lead screw nut arranged inside the rectangular cylinder body of the electric cylinder, wherein the cross section of the inner anti-rotating lead screw nut is rectangular, the center of the inner anti-rotating lead screw nut is matched with a lead screw in the length direction, at least one pair of lateral walls which are mutually parallel of the inner anti-rotating lead screw nut are respectively provided with a plurality of bearings in an embedded mode, the inner circle of each bearing is fixed to a mandrel fixed inside the inner anti-rotating lead screw nut, and the outer surface of the outer circle of each bearing is higher than the lateral wall where the bearing is arranged and is in rolling contact with the corresponding inner wall of the rectangular cylinder body. According to the inner anti-rotating mechanism of the electric cylinder with the rectangular cylinder body, the electric cylinder with the rectangular cylinder body is prevented from rotating through the inner anti-rotating lead screw nut with the cross section similar to the cross section of the rectangular cylinder body, rolling friction of line contact or surface contact between the outer circles of the bearings and the inner wall of the rectangular cylinder body is achieved when the electric cylinder moves linearly through the bearings embedded in the parallel lateral sides of the inner anti-rotating lead screw nut, therefore, resistance is little, abrasion is little, machining is easy and convenient, anti-rotation efficiency is improved, the service life of the electric cylinder is prolonged, and the reliability and moving accuracy of the electric cylinder are improved.
Description
Technical field
The present invention relates to the anti-rotation technical field of electric cylinder, be specially a kind of interior rotation-preventing mechanism of rectangle cylinder body electric cylinder.
Background technology
The reliability of electric cylinder rotation-preventing mechanism and life-span are to estimate electric cylinder reliability and the important indicator in life-span.The advantages such as interior rotation-preventing mechanism compact conformation, volume is little, air-proof condition is good, be widely used on electric cylinder.But interior rotation-preventing mechanism of the prior art is all on the basis of lead screw transmission, realize the anti-rotation effect by increasing other relatively independent device, structural volume is large, and assembling arranges comparatively loaded down with trivial details; While being used for carrying out making stretching motion due to the drive rod of electric cylinder simultaneously, between rotation-preventing mechanism and drive rod, be mainly to rely on rotation-preventing mechanism sliding friction contacts and realizes anti-rotation with cylinder body, work causes the wearing and tearing of rotation-preventing mechanism for a long time, not only can cause the fault of rotation-preventing mechanism, also can cause the reduction of electric cylinder kinematic accuracy, load increases, and need to process key or groove in cylinder interior simultaneously, increase the difficulty of processing, used the section bar of customization to be difficult to ensure the precision of its work.
Summary of the invention
The object of the present invention is to provide a kind of interior rotation-preventing mechanism of rectangle cylinder body electric cylinder, it is easy to process, weares and teares little, can improve the useful life of electric cylinder and the reliability of work.
The present invention is achieved through the following technical solutions:
A kind of interior rotation-preventing mechanism of rectangle cylinder body electric cylinder, it is characterized in that, the interior anti-rotation feed screw nut that comprises the rectangle cylinder interior that is arranged on electric cylinder, interior anti-rotation feed screw nut cross section is rectangular, and from central authorities, with leading screw, coordinate along its length, interior anti-rotation feed screw nut has at least on a pair of sidewall paralleled and is inlaid with respectively some bearings; The inner ring of described bearing is fixed with the axle that is fixed on interior anti-rotation feed screw nut inside, and the outer ring outer surface exceeds the sidewall of its setting and the inwall rolling contact corresponding with the rectangle cylinder body.
Preferably, described bearing is by being arranged on recess-mounted on interior anti-rotation feed screw nut on corresponding sidewall.
Preferably, installation shaft shoulder pad circle between the inner ring of described bearing and groove.
Preferably, described bearing adopts needle bearing.
Preferably, the bearing be embedded in respectively on a pair of sidewall paralleled is symmetrical set.
Preferably, the bearing be arranged on same sidewall is distribution symmetrically.
Preferably, four altogether, the bearing on described same sidewall, rectangular distribution is arranged on an end of corresponding sidewall.
Compared with prior art, the present invention has following useful technique effect:
The present invention realizes own anti-rotation own by the interior anti-rotation feed screw nut similar to rectangle cylinder body cross section, recycling is embedded in the bearing of anti-rotation feed screw nut parallel side and realizes that it is when doing rectilinear motion, the bearing outer ring outer surface exceeds the surface of the sidewall that interior anti-rotation feed screw nut is corresponding, for preventing that feed screw nut surface and inner surface of cylinder block from occurring to wipe, touch, only realize the rolling friction that bearing outer ring contacts with rectangle inboard wall of cylinder block line face, not only resistance is little, wear and tear little, and process simple and convenient, improved the efficiency of anti-rotation, can make the life-span of electric cylinder, reliability and kinematic accuracy improve greatly, and can be calculated according to life-span of bearing rotation-preventing mechanism life and reliability to electric cylinder, simplified the structure of electric cylinder, reduced to greatest extent the harmful effect of interior rotation-preventing mechanism to the electric cylinder life and reliability.
Further, by the setting of groove, can guarantee bearing is facilitated to good lubricating; Utilize shaft shoulder packing ring, can prevent that bearing from moving vertically; By using needle bearing, compact conformation, and spatial volume is little, bearing capacity is large, and can bear larger radial load, arranges comparatively flexible, can be according to different load, the number of bearings of selection varying number; Utilize different position modes of arranging, can be shared load uniformly, and can guarantee the stability of interior anti-rotation feed screw nut motion.
The accompanying drawing explanation
The assembly structure schematic diagram that Fig. 1 is structure described in example of the present invention and electric cylinder.
The three-dimensional structure schematic diagram that Fig. 2 is structure described in example of the present invention and leading screw and drive rod assembling.
The cross-sectional view that Fig. 3 is A-A place in Fig. 1.
In figure: 1 is interior anti-rotation feed screw nut, and 2 is bearing, and 3 is axle, and 4 is shaft shoulder packing ring, and 5 is the rectangle cylinder body, and 6 is leading screw, and 7 is drive rod, and 8 is front tab.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
As shown in Figure 1, Figure 2 and Figure 3, the interior rotation-preventing mechanism of a kind of rectangle cylinder body of the present invention electric cylinder, it is arranged on rectangle cylinder body 5 inside of electric cylinder, and its cross section is the rectangle similar to rectangle cylinder body 5, and from central authorities, with leading screw 6, coordinates along its length; Interior anti-rotation feed screw nut 1 have at least on a pair of sidewall paralleled be inlaid with respectively some to bearing 2; The inner ring of described bearing 2 is fixing with the axle 3 that is fixed on interior anti-rotation feed screw nut 1 inside, and the outer ring inwall corresponding with rectangle cylinder body 5 rolls and contact.Preferably, it is fixing that axle 3 and interior anti-rotation feed screw nut 1 adopt interference fit to realize, prevents from producing in the course of the work axial endplay, preferred, and it is fixing that axle 3 and bearing 2 inner rings adopt interference fit to realize.
Preferably, bearing 2 is by being arranged on recess-mounted on interior anti-rotation feed screw nut 1 on corresponding sidewall; Installation shaft shoulder pad circle 4 between the inner ring of bearing 2 and groove; Bearing 2 adopts needle bearing.
Preferably, the bearing 2 be embedded in respectively on a pair of sidewall paralleled is symmetrical set; The bearing 2 be arranged on same sidewall is distribution symmetrically; Four altogether, bearing 2 on same sidewall, rectangular distribution is arranged on an end of corresponding sidewall.
In this preferred embodiment, shown in Fig. 2 and Fig. 3, take on a pair of sidewall paralleled and be inlaid with respectively four roller bearings and describe as example, four roller bearings on same sidewall are the end that square is arranged on corresponding sidewall, and the roller bearing on two sidewalls also is symmetrical arranged; And the upper axle direction of same sidewall is identical and the roller bearing that is located on the same line, shares an axle 3.
During use, as depicted in figs. 1 and 2, the front end of anti-rotation feed screw nut 1 connects front tab 8 by drive rod 7, realizes straight-line transmission; By with the coordinating of leading screw, receive the input of power; Utilize self profile and the purpose that realizes anti-rotation coordinating of rectangle cylinder body 5, realize the outer ring of bearing 2 and the rolling friction of rectangle cylinder body 5 by arranging of bearing 2 again, the contact of line face, rub little, thereby the serious wear of having avoided the sliding friction between anti-rotation feed screw nut 1 and rectangle cylinder body 5 to bring, kinematic accuracy is low, the problem that load is large.Bearing 2 is except being subject to pressure radially in the course of the work, and also being subject to direction is outside vertically unidirectional axial force, and needle bearing can better adapt to this type of operating mode.During work, as long as bearing 2 can work, anti-rotation effect and the auxiliaring effect of anti-rotation feed screw nut just can normally be realized, therefore can determine according to the life-span of bearing 2 life and reliability of electric cylinder.
Claims (7)
1. the interior rotation-preventing mechanism of a rectangle cylinder body electric cylinder, it is characterized in that, comprise the inner interior anti-rotation feed screw nut (1) of rectangle cylinder body (5) that is arranged on electric cylinder, interior anti-rotation feed screw nut (1) cross section is rectangular, and along its length from central authorities with leading screw (6), coordinate, interior anti-rotation feed screw nut (1) have at least on a pair of sidewall paralleled be inlaid with respectively some to bearing (2); The inner ring of described bearing (2) axle (3) inner with being fixed on interior anti-rotation feed screw nut (1) fixed, and the outer ring outer surface exceeds the sidewall of its setting and the inwall rolling contact corresponding with rectangle cylinder body (5).
2. the interior rotation-preventing mechanism of a kind of rectangle cylinder body electric cylinder according to claim 1, is characterized in that, described bearing (2) is by being arranged on recess-mounted on interior anti-rotation feed screw nut (1) on corresponding sidewall.
3. the interior rotation-preventing mechanism of a kind of rectangle cylinder body electric cylinder according to claim 2, is characterized in that, installation shaft shoulder pad circle (4) between the inner ring of described bearing (2) and groove.
4. according to the interior rotation-preventing mechanism of claim 1 or 2 or 3 described a kind of rectangle cylinder body electric cylinders, it is characterized in that, described bearing (2) adopts needle bearing.
5. the interior rotation-preventing mechanism of a kind of rectangle cylinder body electric cylinder according to claim 1, is characterized in that, the bearing (2) be embedded in respectively on a pair of sidewall paralleled is symmetrical set.
6. a kind of interior rotation-preventing mechanism of rectangle cylinder body electric cylinder according to claim 1 or 5, is characterized in that, is arranged on bearing (2) on same sidewall and is symmetrically and distributes.
7. the interior rotation-preventing mechanism of a kind of rectangle cylinder body electric cylinder according to claim 6, is characterized in that, four altogether, the bearing (2) on described same sidewall, and rectangular distribution is arranged on an end of corresponding sidewall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310339052.7A CN103441607B (en) | 2013-08-06 | 2013-08-06 | A kind of interior rotation-preventing mechanism of electric cylinder with rectangular cylinder body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310339052.7A CN103441607B (en) | 2013-08-06 | 2013-08-06 | A kind of interior rotation-preventing mechanism of electric cylinder with rectangular cylinder body |
Publications (2)
| Publication Number | Publication Date |
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| CN103441607A true CN103441607A (en) | 2013-12-11 |
| CN103441607B CN103441607B (en) | 2016-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310339052.7A Active CN103441607B (en) | 2013-08-06 | 2013-08-06 | A kind of interior rotation-preventing mechanism of electric cylinder with rectangular cylinder body |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811648A (en) * | 2016-03-23 | 2016-07-27 | 武汉穆特科技有限公司 | Structure of direct-connected electric cylinder |
| CN106678283A (en) * | 2017-01-17 | 2017-05-17 | 北京因时机器人科技有限公司 | Small linear driver with position feedback function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63154038A (en) * | 1986-12-17 | 1988-06-27 | Hiroshi Teramachi | Hollow shaft motor with ball screw |
| US4782715A (en) * | 1986-10-13 | 1988-11-08 | Rockwell-Cim | System for locking a linear device for rapidly adjusting and immobilizing a movable part relative to a fixed part |
| CN101189451A (en) * | 2005-03-31 | 2008-05-28 | Thk株式会社 | Electric actuator |
| CN201466875U (en) * | 2009-04-02 | 2010-05-12 | 中国航天科技集团公司烽火机械厂 | electromechanical actuator |
| CN201549971U (en) * | 2009-10-27 | 2010-08-11 | 捷世达企业股份有限公司 | Transmission structure of linear actuator |
-
2013
- 2013-08-06 CN CN201310339052.7A patent/CN103441607B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4782715A (en) * | 1986-10-13 | 1988-11-08 | Rockwell-Cim | System for locking a linear device for rapidly adjusting and immobilizing a movable part relative to a fixed part |
| JPS63154038A (en) * | 1986-12-17 | 1988-06-27 | Hiroshi Teramachi | Hollow shaft motor with ball screw |
| CN101189451A (en) * | 2005-03-31 | 2008-05-28 | Thk株式会社 | Electric actuator |
| CN201466875U (en) * | 2009-04-02 | 2010-05-12 | 中国航天科技集团公司烽火机械厂 | electromechanical actuator |
| CN201549971U (en) * | 2009-10-27 | 2010-08-11 | 捷世达企业股份有限公司 | Transmission structure of linear actuator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811648A (en) * | 2016-03-23 | 2016-07-27 | 武汉穆特科技有限公司 | Structure of direct-connected electric cylinder |
| CN106678283A (en) * | 2017-01-17 | 2017-05-17 | 北京因时机器人科技有限公司 | Small linear driver with position feedback function |
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| Publication number | Publication date |
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| CN103441607B (en) | 2016-08-10 |
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