CN108953402A - A kind of fast mounted clutch type oldham coupling - Google Patents

A kind of fast mounted clutch type oldham coupling Download PDF

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Publication number
CN108953402A
CN108953402A CN201810666107.8A CN201810666107A CN108953402A CN 108953402 A CN108953402 A CN 108953402A CN 201810666107 A CN201810666107 A CN 201810666107A CN 108953402 A CN108953402 A CN 108953402A
Authority
CN
China
Prior art keywords
coupler
sliding block
axis
oldham coupling
spring pedestal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810666107.8A
Other languages
Chinese (zh)
Inventor
郭建伟
石兵
刘国彪
张耀春
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Nuclear Power Engineering Co Ltd
Original Assignee
China Nuclear Power Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Nuclear Power Engineering Co Ltd filed Critical China Nuclear Power Engineering Co Ltd
Priority to CN201810666107.8A priority Critical patent/CN108953402A/en
Publication of CN108953402A publication Critical patent/CN108953402A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16DCOUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D3/00Yielding couplings, i.e. with means permitting movement between the connected parts during the drive
    • F16D3/02Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions
    • F16D3/06Yielding couplings, i.e. with means permitting movement between the connected parts during the drive adapted to specific functions specially adapted to allow axial displacement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Abstract

The invention belongs to shaft coupling technical fields, are related to a kind of fast mounted clutch type oldham coupling.The oldham coupling includes sequentially connected first half a coupler, sliding block, the second half a coupler and elastic telescopic device and anti-drop device.Fast mounted clutch type oldham coupling of the invention can rapidly and efficiently carry out dismounting.Fast mounted clutch type oldham coupling can conveniently be coupled the connection and disengagement of two axis;Dismounting couplers ontology is not needed during connection and disengagement, components is not also had and falls off, suitable for being coupled the occasion for needing frequently to install and remove an axis two axis.In addition, allowing two coupled axis to have certain radial displacement, angular displacement or axial displacement by setting sliding block, the installation accuracy requirement of coupled two axis can be reduced.

Description

A kind of fast mounted clutch type oldham coupling
Technical field
The invention belongs to shaft coupling technical fields, are related to a kind of fast mounted clutch type oldham coupling.
Background technique
Shaft coupling is two axis of connection or axis and revolving meber, is turned round together during passing movement and power without taking off A kind of device opened.Wherein, there are certain relative displacements for two between centers of packaged type positive coupling permission, reach suitable for being difficult To the occasion entirely on the center of two axis, or to reach the occasion of precise alignment cost prohibitive.In certain occasions, need often to tear open A wherein axis and the ontology being connected with axis are unloaded, to accomplish this point, existing typical packaged type positive coupling, such as sliding block Shaft coupling, gear coupling, roller chain coupling etc. are required to that shaft coupling ontology is disassembled and installed, relatively complicated.For This, devises a kind of fast mounted clutch type oldham coupling.
Summary of the invention
The object of the present invention is to provide a kind of fast mounted clutch type oldham couplings, can rapidly and efficiently carry out dismounting.
In order to achieve this, the present invention provides a kind of fast mounted clutch type oldham coupling, institute in the embodiment on basis The oldham coupling stated include sequentially connected first half a coupler, sliding block, the second half a coupler and elastic telescopic device and Anti-drop device,
One in first half a coupler, the second half a coupler is fixedly connected with the axis of place side, another is logical The elastic telescopic device is crossed to be flexibly connected with the axis of place side in axis direction;
The sliding block is matched by shape size recessed respectively with first half a coupler, the second half a coupler Slot is connect with protrusion, and the connection direction of the sliding block and first half a coupler perpendicular to the sliding block with it is described The second half a coupler connection direction;
The anti-drop device is mounted on outside or the institute of the connecting portion of the sliding block and first half a coupler The outside of the connecting portion of the sliding block and second half a coupler stated, for limiting the sliding block and the first half a coupler Or second with respect to the range of sliding and maintain the connection between them not disengage between half a coupler;
The first half a coupler, sliding block, the second half a coupler described in when the elastic telescopic device is stretched out are connected with each other hair Wave shaft coupling effect;The first half a coupler or the second half a coupler that are not limited by the anti-drop device when tightening and described Sliding block separation releases shaft coupling effect.
In a preferred embodiment, the present invention provides a kind of fast mounted clutch type oldham coupling, wherein described Elastic telescopic device includes spring pedestal, holddown spring, the first holding screw, positioning screw,
The spring pedestal is used to through its center aperture and fix an axis with axis, meanwhile, pass through spring pedestal Aperture across first half a coupler or second half a coupler one end, or pass through first half a coupler or second Half a coupler passes through the aperture of spring pedestal one end, spring pedestal and first half a coupler or the second half a coupler set It closes;
The holddown spring is mounted on the spring pedestal and first half a coupler or the second half a coupler Coupling part between;
First holding screw is used to secure a shaft in the aperture at the spring pedestal center;
The positioning screw is used to keep the set of first half a coupler or the second half a coupler and spring pedestal Connection is closed, is mounted in the aperture of first half a coupler or the second half a coupler surface, the table of insertion spring pedestal Face fluting, or be mounted in the aperture on the spring pedestal surface, the first half a coupler of insertion or the second half a coupler Surface fluting.
In a preferred embodiment, the present invention provides a kind of fast mounted clutch type oldham coupling, wherein described Oldham coupling further includes axial screw without a head of slotting, for the anti-drop device to be fixed on the sliding block, the first half On shaft coupling or the second half a coupler.
In a preferred embodiment, the present invention provides a kind of fast mounted clutch type oldham coupling, wherein described Oldham coupling further includes for securing a shaft at first half a coupler or the second half a coupler being firmly connected with it The second holding screw in the aperture at center.
The beneficial effects of the present invention are fast mounted clutch type oldham coupling of the invention can rapidly and efficiently carry out tearing open Dress.
The fast mounted clutch type oldham coupling that the present invention designs can conveniently be coupled the connection and disengagement of two axis;Couple and de- Dismounting couplers ontology is not needed during opening, components is not also had and falls off, and is needed frequently suitable for coupled two axis Installation and the occasion for removing an axis.In addition, allowing two coupled axis to have certain radial displacement, angle position by setting sliding block It moves or axial displacement, the installation accuracy that can reduce coupled two axis requires.
Detailed description of the invention
Fig. 1 is the composed structure schematic diagram of the first illustrative fast mounted clutch type oldham coupling of the invention.
Fig. 2 is the composed structure schematic diagram of second of illustrative fast mounted clutch type oldham coupling of the invention.
Specific embodiment
A specific embodiment of the invention is further illustrated below in conjunction with attached drawing.
The composed structure of the first illustrative fast mounted clutch type oldham coupling of the invention as shown in Figure 1, include according to Spring pedestal 1, holddown spring 3, the first half a coupler 5, anti-decylization 6, sliding block 9, the second half a coupler 10, Yi Ji of secondary connection One holding screw 2, the fluting of positioning screw 4, first fluting of axial screw 7, second without a head axial screw 8 without a head, the second clamp screw Nail 11.
The centre bore of spring pedestal 1 covers first axle 12, and is fixed in first axle 12 by the first holding screw 2.First is tight Determine the non-bulging cylindrical outer surface in spring pedestal 1 of screw 2.
3 sets of the holddown spring cylindrical outer surfaces in spring pedestal 1, be mounted on spring pedestal 1 and the first half a coupler 5 it Between, side is limited by the shaft shoulder of spring pedestal 1, and the other side is limited by the first half a coupler 5.
The centre bore of first half a coupler 5 covers the cylindrical outer surface in spring pedestal 1, and positioning screw 4 is fixed on the first half On shaft coupling 5, and it is radially inserted into the straight trough mouth of spring pedestal 1, makes the first half a coupler 5 and spring pedestal 1 can be along straight trough mouth The opposite sliding in direction can be rotated synchronously without disengaging, simultaneously both under the effect of circumferential torque.
The groove and male cooperation, composition that first half a coupler 5 is processed with sliding block 9 by surface can be along 9 diameters of sliding block To opposite sliding and cannot be along the kinematic pair of the axially free disengagement of sliding block 9;Then, by the first fluting 7 He of axial screw without a head Anti-decylization 6 is fixed on the outer surface of sliding block 9 by the second fluting axial screw 8 without a head, first half a coupler of the limitation of anti-decylization 65 with The kinematic pair that sliding block 9 forms cannot be radially decoupled along sliding block 9, while allowing a certain amount of opposite sliding.
The groove and male cooperation, composition that sliding block 9 and the second half a coupler 10 are processed by surface can be along 9 diameters of sliding block To opposite sliding and can be along the kinematic pair of the axially free disengagement of sliding block 9.The centre bore of second half a coupler 10 covers the second axis 13, And it is fixed on the second axis 13 by the second holding screw 11.
The principle of the first above-mentioned illustrative fast mounted clutch type oldham coupling of the invention is as follows.
Spring pedestal 1, the first holding screw 2, holddown spring 3, positioning screw 4, the first half a coupler 5, anti-decylization 6, The one fluting fluting of axial screw 7, second without a head axial screw 8 without a head, sliding block 9 are installed together with first axle 12 and do not disengage mutually; Second half a coupler 10, the second holding screw 11 are installed together with the second axis 13 and do not disengage mutually.Pass through sliding block 9 and the second half The cooperation of axis device 10 completes two part connection transmitting torques or disengages separation.It is stirred under quiescent conditions to 1 direction of spring pedestal First fluting axial screw 7, second without a head slot axial screw 8 without a head when, holddown spring 3 is compressed, and positioning screw 4 is along spring The straight trough mouth of pedestal 1 slides, and disengages sliding block 9 and the second half a coupler 10;And holddown spring 3 is to the first half under rotating condition The pressing force that axis device 5 applies can maintain coupling for sliding block 9 and the second half a coupler 10, and positioning screw 4 plays transmitting torque at this time Effect.Two kinematic pair glide directions composed by sliding block 9 and the first half a coupler 5 and the second half a coupler 10 are mutually hung down Directly, allow to have certain radial displacement, angular displacement or axial displacement between first axle 12 and the second axis 13.
The composed structure of second of illustrative fast mounted clutch type oldham coupling of the invention as shown in Fig. 2, include according to Spring pedestal 1, holddown spring 3, the first half a coupler 5, anti-flake 6, sliding block 9, the second half a coupler 10, Yi Ji of secondary connection One holding screw 2, the fluting of positioning screw 4, first fluting of axial screw 7, second without a head axial screw 8 without a head, the second clamp screw Nail 11.
The centre bore of spring pedestal 1 covers first axle 12, and is fixed in first axle 12 by the first holding screw 2.
Holddown spring 3 is mounted in the counterbore of spring pedestal 1, is mounted between spring pedestal 1 and the first half a coupler 5, Side is limited by spring pedestal 1, and the other side is limited by the first half a coupler 5 (will be open and clear on the outside of the counterbore of spring pedestal 1 in Fig. 2 Mouth is to see this exemplary internal structure clearly, the structure of this gap not necessarily).
The counterbore of spring pedestal 1 covers the cylindrical outer surface in the first half a coupler 5, and positioning screw 4 is fixed on spring pedestal 1 On, and it is radially inserted into the straight trough mouth of the first half a coupler 5, make the first half a coupler 5 and spring pedestal 1 can be along straight trough mouth direction Opposite sliding can be rotated synchronously without disengaging, simultaneously both under the effect of circumferential torque.
The groove and male cooperation, composition that sliding block 9 and the first half a coupler 5 are processed by surface can be along 9 diameters of sliding block To opposite sliding and can be along the kinematic pair of the axially free disengagement of sliding block 9.
The groove and male cooperation, composition that second half a coupler 10 is processed with sliding block 9 by surface can be along 9 diameters of sliding block To opposite sliding and cannot be along the kinematic pair of the axially free disengagement of sliding block 9;Then, by the first fluting 7 He of axial screw without a head Anti- flake 6 is fixed on the outer surface of the second half a coupler 10 by the second fluting axial screw 8 without a head, the anti-limitation of flake 6 the second half The kinematic pair that shaft coupling 10 is formed with sliding block 9 cannot be radially decoupled along sliding block 9, while allowing a certain amount of opposite sliding.
The centre bore of second half a coupler 10 covers the second axis 13, and is fixed on the second axis 13 by the second holding screw 11.
The principle of above-mentioned second illustrative fast mounted clutch type oldham coupling of the invention is as follows.
Spring pedestal 1, the first holding screw 2, holddown spring 3, positioning screw 4, the first half a coupler 5 are pacified with first axle 12 It is fitted together and does not disengage mutually;Anti- flake 6, first axial screw 7, second without a head of slotting is slotted axial screw 8 without a head, sliding block 9, the Two half a couplers 10, the second holding screw 11 are installed together with the second axis 13 and do not disengage mutually.Pass through sliding block 9 and the first half shaft couplings The cooperation of device 5 completes two part connection transmitting torques or disengages separation.First is stirred to 1 direction of spring pedestal under quiescent conditions When half a coupler 5, holddown spring 3 is compressed, and positioning screw 4 is slided along the straight trough mouth of the first half a coupler 5, makes sliding block 9 and the One half a coupler 5 disengages;And under rotating condition holddown spring 3 to the pressing force that the first half a coupler 5 applies can maintain sliding block 9 with The connection of first half a coupler 5, positioning screw 4 plays the role of transmitting torque at this time.Sliding block 9 and the first half a coupler 5 and Two kinematic pair glide directions composed by two half a couplers 10 are mutually perpendicular to, and allow to have one between first axle 12 and the second axis 13 Fixed radial displacement, angular displacement or axial displacement.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art Mind and range.If in this way, belonging to the model of the claims in the present invention and its equivalent technology to these modifications and changes of the present invention Within enclosing, then the present invention is also intended to include these modifications and variations.Above embodiment only illustrates to of the invention Bright, the present invention can also be implemented with other ad hoc fashions or other particular forms, without departing from the gist of the invention or originally Matter feature.Therefore, the embodiment of description is regarded as illustrative and non-limiting in any way.Model of the invention Enclosing should be illustrated by appended claims, and any variation equivalent with the intention and range of claim should also be included in the present invention In the range of.

Claims (4)

1. a kind of fast mounted clutch type oldham coupling, it is characterised in that: the oldham coupling includes sequentially connected first Half a coupler, sliding block, the second half a coupler and elastic telescopic device and anti-drop device,
One in first half a coupler, the second half a coupler is fixedly connected with the axis of place side, another passes through institute The elastic telescopic device stated is flexibly connected with the axis of place side in axis direction;
The groove that the sliding block and first half a coupler, the second half a coupler are matched by shape size respectively with Protrusion connection, and the connection direction of the sliding block and first half a coupler is perpendicular to the sliding block and described the The connection direction of two half a couplers;
The anti-drop device is mounted on the outside or described of the connecting portion of the sliding block and first half a coupler The outside of the connecting portion of sliding block and second half a coupler, for limiting the sliding block and the first half a coupler or the Between two half a couplers with respect to sliding range and maintain the connection between them not disengage;
The first half a coupler, sliding block, the second half a coupler described in when the elastic telescopic device is stretched out, which are connected with each other, plays connection The effect of axis device;Not by the first half a coupler of the anti-drop device limit or the second half a coupler and the sliding block when tightening Separation releases shaft coupling effect.
2. oldham coupling according to claim 1, it is characterised in that: the elastic telescopic device includes spring bottom Seat, holddown spring, the first holding screw, positioning screw,
The spring pedestal is used to through its center aperture and fix an axis with axis, meanwhile, it is passed through by spring pedestal The aperture of first half a coupler or second half a coupler one end, or pass through first half a coupler or the second half Axis device passes through the aperture of spring pedestal one end, spring pedestal and first half a coupler or the second half a coupler fitting;
The holddown spring is mounted on the company of the spring pedestal and first half a coupler or the second half a coupler Between socket part point;
First holding screw is used to secure a shaft in the aperture at the spring pedestal center;
The positioning screw is for keeping the fitting of first half a coupler or the second half a coupler and spring pedestal to connect It connects, is mounted in the aperture of first half a coupler or the second half a coupler surface, the surface of insertion spring pedestal is opened Slot, or be mounted in the aperture on the spring pedestal surface, the surface of the first half a coupler of insertion or the second half a coupler Fluting.
3. oldham coupling according to claim 1, it is characterised in that: the oldham coupling further includes that fluting is without a head Axial screw, for the anti-drop device to be fixed on to sliding block, the first half a coupler or second half a coupler.
4. oldham coupling according to claim 1, it is characterised in that: the oldham coupling further includes for by axis The second clamp screw being fixed in the aperture of first half a coupler or the second half a coupler center that are firmly connected with it Nail.
CN201810666107.8A 2018-06-26 2018-06-26 A kind of fast mounted clutch type oldham coupling Pending CN108953402A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810666107.8A CN108953402A (en) 2018-06-26 2018-06-26 A kind of fast mounted clutch type oldham coupling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810666107.8A CN108953402A (en) 2018-06-26 2018-06-26 A kind of fast mounted clutch type oldham coupling

Publications (1)

Publication Number Publication Date
CN108953402A true CN108953402A (en) 2018-12-07

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CN201810666107.8A Pending CN108953402A (en) 2018-06-26 2018-06-26 A kind of fast mounted clutch type oldham coupling

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CN (1) CN108953402A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109780076A (en) * 2019-03-22 2019-05-21 平湖莱顿光学仪器制造有限公司 A kind of attachment device and shaft coupling
CN113941729A (en) * 2021-11-05 2022-01-18 济南泰成科技有限公司 Floating type grooving machine

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1784132A (en) * 2004-11-24 2006-06-07 深圳富泰宏精密工业有限公司 Hinge structure
CN201363373Y (en) * 2008-12-05 2009-12-16 重庆市星格水泵有限公司 Coupling
CN101699092A (en) * 2009-10-20 2010-04-28 深南电路有限公司 coupler
CN202118138U (en) * 2011-06-21 2012-01-18 襄阳宇清传动科技有限公司 Quick-mounted rzeppa universal coupling for multi-roller straightening machine
CN202579694U (en) * 2012-05-21 2012-12-05 青岛德盛利集团表面处理设备有限公司 Separable coupler
CN202732749U (en) * 2012-08-22 2013-02-13 莱芜钢铁集团有限公司 Slide block coupler
CN203023315U (en) * 2012-12-27 2013-06-26 云南中建博能工程技术有限公司 Novel coupler
CN203176190U (en) * 2013-03-07 2013-09-04 国发重工机械有限公司 Fastening device used for connecting shafts
CN103732474A (en) * 2011-08-06 2014-04-16 戴姆勒股份公司 Steering spindle arrangement
CN203560324U (en) * 2013-07-21 2014-04-23 辽宁轨道交通职业学院 Rapid loading and unloading shaft coupler
CN104088894A (en) * 2014-07-02 2014-10-08 苏州怡尔欣精密科技有限公司 Rotating shaft structure
CN204357969U (en) * 2014-12-24 2015-05-27 浙江迦南科技股份有限公司 A kind of oldham coupling with vibration damper plate
CN204493481U (en) * 2015-01-12 2015-07-22 程彦秋 The dismountable coupling of a kind of projection

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1784132A (en) * 2004-11-24 2006-06-07 深圳富泰宏精密工业有限公司 Hinge structure
CN201363373Y (en) * 2008-12-05 2009-12-16 重庆市星格水泵有限公司 Coupling
CN101699092A (en) * 2009-10-20 2010-04-28 深南电路有限公司 coupler
CN202118138U (en) * 2011-06-21 2012-01-18 襄阳宇清传动科技有限公司 Quick-mounted rzeppa universal coupling for multi-roller straightening machine
CN103732474A (en) * 2011-08-06 2014-04-16 戴姆勒股份公司 Steering spindle arrangement
CN202579694U (en) * 2012-05-21 2012-12-05 青岛德盛利集团表面处理设备有限公司 Separable coupler
CN202732749U (en) * 2012-08-22 2013-02-13 莱芜钢铁集团有限公司 Slide block coupler
CN203023315U (en) * 2012-12-27 2013-06-26 云南中建博能工程技术有限公司 Novel coupler
CN203176190U (en) * 2013-03-07 2013-09-04 国发重工机械有限公司 Fastening device used for connecting shafts
CN203560324U (en) * 2013-07-21 2014-04-23 辽宁轨道交通职业学院 Rapid loading and unloading shaft coupler
CN104088894A (en) * 2014-07-02 2014-10-08 苏州怡尔欣精密科技有限公司 Rotating shaft structure
CN204357969U (en) * 2014-12-24 2015-05-27 浙江迦南科技股份有限公司 A kind of oldham coupling with vibration damper plate
CN204493481U (en) * 2015-01-12 2015-07-22 程彦秋 The dismountable coupling of a kind of projection

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109780076A (en) * 2019-03-22 2019-05-21 平湖莱顿光学仪器制造有限公司 A kind of attachment device and shaft coupling
CN109780076B (en) * 2019-03-22 2024-03-08 平湖莱顿光学仪器制造有限公司 Connecting device and coupling
CN113941729A (en) * 2021-11-05 2022-01-18 济南泰成科技有限公司 Floating type grooving machine
CN113941729B (en) * 2021-11-05 2022-07-26 济南泰成科技有限公司 Floating groove cutting machine

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Application publication date: 20181207