CN104948694B - Precision drive lead screw flexible connecting pair and drive mechanism - Google Patents
Precision drive lead screw flexible connecting pair and drive mechanism Download PDFInfo
- Publication number
- CN104948694B CN104948694B CN201510281855.0A CN201510281855A CN104948694B CN 104948694 B CN104948694 B CN 104948694B CN 201510281855 A CN201510281855 A CN 201510281855A CN 104948694 B CN104948694 B CN 104948694B
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- CN
- China
- Prior art keywords
- leading screw
- driving member
- precision drive
- spacer shell
- drive leading
- 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.)
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Classifications
-
- 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
-
- 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 invention discloses a precision drive lead screw flexible connecting pair and a drive mechanism. The precision drive lead screw flexible connecting pair comprises a drive lead screw, a transition sleeve which is fixedly arranged on a nut of the drive lead screw in sleeving mode, and a deformation key which is arranged on the transmission sleeve in an embedded mode and used for being matched with a driving medium, and the length direction of the deformation key is parallel to the axial direction of the lead screw; the deformation key comprises a fixation part embedded in the transmission sleeve and a connection part which is used for being matched with the driving medium, and the two opposite sides of the connection part are provided with semicircle parts which are in line contact with the driving medium respectively. According to the precision drive lead screw flexible connecting pair and the drive mechanism, the structure is simple, and by means of the arrangement of the transmission sleeve and the deformation key on the nut of the drive lead screw, the flexible connection of the drive lead screw and the driving medium is achieved; compared with the rigid connection in the prior art, the situations of additional radial force and alternating axial deformation are effectively eliminated, and the operational reliability of the whole drive mechanism is improved.
Description
Technical field
The present invention relates to a kind of turn-screw auxiliary connection, more particularly to a kind of flexible connection of precision drive leading screw is secondary and has
The secondary transmission mechanism of the precision drive leading screw flexible connection.
Background technology
In turn-screw auxiliary connection, the flange end of turn-screw top nut is typically provided with four screw holes, wears for screw
Cross and be fixed together driving member and nut, so that driving member and turn-screw auxiliary connection are to be rigidly connected.For example,
In nuclear power station, the motive power of its air lock door derives from alternating current generator, and power is delivered to jack by a series of being rigidly connected
On the turn-screw of structure, all motions of lifting body are driven by the rotary motion of turn-screw.Generally, turn-screw with
To be rigidly connected, turn-screw and its nut are inevitably subject to a certain extent an extra footpath to jacking driving support seat
To power effect, along with deviation link is cumulative manufacturing, install, use and maintain etc., the turn-screw that goes down for a long time is in radial direction side
Cyclic deformation can occur upwards, turn-screw fatigue fracture is eventually resulted in.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of effective precision drive leading screw for eliminating additional radial power is soft
Property auxiliary connection and transmission mechanism.
The technical solution adopted for the present invention to solve the technical problems is：A kind of precision drive leading screw flexible connection is provided
Pair, including leading screw, the fixed spacer shell being set on the nut of the turn-screw and the use being embedded on the spacer shell
In the deformation key coordinated with driving member, the axial direction of the parallel leading screw in the deformation key length direction；
The deformation key includes being embedded the fixed part in the spacer shell and the company for coordinating with the driving member
Socket part, the opposite sides of the connecting portion is respectively equipped with the arc half-round with the driving member linear contact lay.
Preferably, the half-round on the length direction of the connecting portion, it is outside from the opposite sides of the connecting portion
Protrusion；
It is plane positioned at the upper surface of the connecting portion described in two between half-round.
Preferably, the spacer shell includes the columnar part and shoulder of annular, and the shoulder is integrally formed in the column
In the first end in portion；The periphery in space or the columnar part and shoulder between the columnar part and shoulder forms and supplies the biography
Moving part is arranged holding part thereon, and the shoulder is abutted with the flange end of the nut, and the deformation key is embedded in the column
In portion and/or shoulder.
Preferably, the precision drive leading screw flexible connection pair is also included for the driving member to be pushed against into the holding part
On standby tight nut, the standby tight nut is set on second end relative with the first end of the spacer shell.
Preferably, the second end periphery of the spacer shell is provided with the external screw thread coordinated with the standby tight nut inner thread.
Preferably, precision drive leading screw flexible connection pair be also included in it is described it is standby between tight nut and driving member, be arranged
Standby tight set on the end of the spacer shell second.
Preferably, the spacer shell and the deformation key are rigid member.
The present invention also provides a kind of transmission mechanism, including the precision drive leading screw flexible connection described in any of the above item it is secondary with
And driving member, the precision drive leading screw flexible connection is secondary to be connected and drives the driving member to move；
The secondary spacer shell of the correspondence precision drive leading screw flexible connection and deformation key set on the connection end of the driving member
The slotted eye for having connecting hole and connecting with the connecting hole, the slotted eye is from the inwall of the connecting hole away from the connection
The central axis direction in hole extends；The driving member is set on the spacer shell with the connecting hole, the connection of the deformation key
Portion coordinates in the slotted eye, and the inwall brought into linear contact of the half-round and the slotted eye for deforming key.
Preferably, millimetre-sized gap is left between the circumferential lateral surface of the internal face of the connecting hole and the spacer shell.
Preferably, millimetre-sized gap is left between the upper surface of the bottom surface of the slotted eye and the connecting portion.
The turn-screw flexible connection of the present invention is secondary, simple structure, by spacer shell and deformation key turn-screw spiral shell
Setting on mother, realizes the flexible connection between turn-screw and driving member, is rigidly connected compared to of the prior art, effectively
The situation of additional radial power and alternation axial deformation is eliminated, the operational reliability of whole transmission mechanism is improved.
Description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the radial section structural representation of the transmission mechanism of first embodiment of the invention；
Fig. 2 is the axial section structural representation of transmission mechanism shown in Fig. 1；
Fig. 3 is cross-sectional view of the transmission mechanism shown in Fig. 2 along line A-A；
Fig. 4 is the radial section structural representation of the transmission mechanism of second embodiment of the invention；
Fig. 5 is the axial section structural representation of transmission mechanism shown in Fig. 4；
Fig. 6 is cross-sectional view of the transmission mechanism shown in Fig. 5 along line B-B.
Specific embodiment
In order to be more clearly understood to the technical characteristic of the present invention, purpose and effect, now compare accompanying drawing and describe in detail
The specific embodiment of the present invention.
As Figure 1-3, the flexible connection of the transmission mechanism of first embodiment of the invention, including precision drive leading screw it is secondary and
Driving member 1, the secondary connection of precision drive leading screw flexible connection simultaneously drives driving member 1 to move.The transmission mechanism can be but be not limited to push up
Rise mechanism.
Wherein, the flexible connection of precision drive leading screw is secondary includes that turn-screw 2, fixation are set on the nut 3 of turn-screw 2
Spacer shell 4 and the deformation key 5 that is embedded on spacer shell 4.
Fixation of the spacer shell 4 on nut 3 can be locked by securing members 30 such as bolts.The spacer shell 4 is rigid member, with spiral shell
Female 3 is to be rigidly connected.Spacer shell 4 may include the columnar part 41 and shoulder 42 of annular, and columnar part 41 includes first for being connected
End and the second end, shoulder 42 is integrally formed in the first end of columnar part 41.Shoulder 42 is abutted with the flange end of nut 3, shoulder
The through hole of several insertions can be provided with 42, for wearing for the securing members such as bolt 30；Securing member 30 pierces into shoulder from the flange end of nut 3
In the through hole in portion 42, shoulder 42 is linked together with nut 3, so as to spacer shell 4 is fixedly connected on nut 3.
Deformation key 5 is embedded on spacer shell 4, and both coordinate for accurate rigid key, being capable of effective driving torque power.Deformation key
5 are used to coordinate with driving member 1, deform the axial direction of the length direction parallel drive leading screw 2 of key 5.In driving member, 1 set was set to
After crossing on set 4, by preventing from being moved on spacer shell 4 with the cooperation of deformation key 5.The deformation key 5 may include the fixation being connected
Portion 51 and connecting portion 52, fixed part 51 is embedded in spacer shell 4, and connecting portion 52 is used to coordinate with driving member 1.
In the present embodiment, the space between columnar part 41 and shoulder 42 forms holding part, is arranged thereon for driving member 1.
Deformation key 5 is embedded in the columnar part 41 of spacer shell 4；The length of deformation key 5 is not more than the length of columnar part 41.Specifically, become
Shape key 5 is embedded in the columnar part 41 of spacer shell 4 with fixed part 51, prevents driving member 1 circumferential mobile along spacer shell 4.
Especially, the opposite sides of connecting portion 52 is respectively equipped with half-round 53, and connecting portion 52 is by half-round 53 and transmission
The linear contact lay of part 1.In the present embodiment, half-round 53 on the length direction of connecting portion 52, from the opposite sides of connecting portion 52 to
Outer protrusion.Two half-rounds 53 unanimously arrange (radius is identical), so as to be symmetrical set the opposite sides in connecting portion 52, two
It is arbitrarily all consistent with the wire length between the point of the contact of driving member 1 in half-round 53.The length of half-round 53 is along connecting portion 52
Length direction extend, so as to driving member 1 formed linear contact lay.
The upper surface of the connecting portion 52 between two half-rounds 53 is to leave gap between plane, with driving member 1.Should
Gap be millimetre-sized gap, such as 1-2mm.
Further, precision drive leading screw flexible connection pair also includes standby tight nut 6, be set in columnar part 41 with the
On the second relative end of one end, for driving member 1 to be pushed against into holding part, prevent driving member 1 from axially moving on spacer shell 4
Move, release.Driving member 1 can slide between the shoulder 42 of spacer shell 4 and the standby end face of tight nut 6, and sliding distance is not more than
0.02mm, the conduction deformation of effective relieving mechanism.
Accordingly, the end periphery of columnar part 41 second of spacer shell 4 is provided with the external screw thread with the standby screw-internal thread fit of tight nut 6
(not shown).Standby tight nut 6 can be one or more, preferably two.
In addition, the secondary standby tight set 7 for also including being set on the end of spacer shell 4 second of the precision drive leading screw flexible connection, should
Standby tight set 7 is located at between tight nut 6 and driving member 1, further pushes against driving member 1.The standby tight set 7 is rigid member, is not limited to
One, can increase and decrease as needed.
Driving member 1 is connected with its connection end with precision drive leading screw flexible connection pair.When transmission mechanism is jack
During structure, driving member 1 is connected with axle block with precision drive leading screw flexible connection pair.
Correspondence spacer shell 4 and deformation key 5 are provided with connecting hole 11 and slotted eye 12 on the connection end of driving member 1, slotted eye 12 with
Connecting hole 11 is connected.Slotted eye 12 extends from the inwall of connecting hole 11 away from the central axis direction of connecting hole 11, for housing
Deformation key 5.Driving member 1 is set on spacer shell 4 with connecting hole 11, and the connecting portion 52 for deforming key 5 coordinates in slotted eye 12, and is become
The half-round 53 of shape key 5 and the inwall brought into linear contact of slotted eye 12, it is ensured that within the specific limits, when driving member 1 and spacer shell 4
During raw relative displacement, it still is able to effectively realize effective transmission of moment of torsion, effectively eliminates additional radial power and alternation axial deformation
Situation, improves the operational reliability of whole transmission mechanism.
There is millimetre-sized gap between the internal face of connecting hole 11 and the circumferential lateral surface of spacer shell 4, be manufacture deviation, install
Deviation, stress deformation reserve enough spaces and spend in advance.Specifically, the gap is located at the internal face and columnar part 41 of connecting hole 11
Between circumferential lateral surface；The gap can be 1-2mm.
Millimetre-sized gap is left between the bottom surface of slotted eye 12 and the upper surface of connecting portion 52, the gap can be 1-2mm.It is excellent
Selection of land, the gap and the bottom surface of slotted eye 12 between the internal face of connecting hole 11 and the circumferential lateral surface of spacer shell 4 and the upper table of connecting portion 52
Gap between face is consistent.
As Figure 4-Figure 6, the flexible connection of the transmission mechanism of second embodiment of the invention, including precision drive leading screw it is secondary and
Driving member 1, the secondary connection of precision drive leading screw flexible connection simultaneously drives driving member 1 to move.
Wherein, the flexible connection of precision drive leading screw is secondary includes that turn-screw 2, fixation are set on the nut 3 of turn-screw 2
Spacer shell 4 and the deformation key 5 that is embedded on spacer shell 4.The shoulder 42 of spacer shell 4 is by securing member 30 and spiral shells such as bolts
Female 3 flange end is fixedly connected.
In the present embodiment, precision drive leading screw flexible connection it is secondary from unlike above-mentioned first embodiment：Deformation key 5 is embedded
On the shoulder 42 of spacer shell 4.The columnar part 41 of spacer shell 4 and the periphery of shoulder 42 form holding part, and for driving member 1 it is arranged
On.The length of deformation key 5 can be configured according to the width of shoulder 42, so that deformation key 5 can stably be mounted in shoulder 42
On.
It is to be appreciated that according to actual setting, deformation key 5 also can be embedded in columnar part 41 and shoulder 42.
In the present embodiment, the connection end of driving member 1 is circular shaft.The precision drive leading screw flexible connection of the embodiment is secondary also
May include standby tight nut 6, standby tight set 7 etc..The concrete structure of deformation key 5, the set-up mode of standby tight nut 6 and standby tight set 7 and
Connecting hole 11 and setting of slotted eye 12 etc. on driving member 1 can refer to related described in above-mentioned first embodiment, and here is no longer gone to live in the household of one's in-laws on getting married
State.
When the transmission mechanism of above-mentioned first, second embodiment works, the level of nut 3 is driven by the rotation of turn-screw 2
It is mobile, drive moving horizontally for driving member 1 so as to pass through spacer shell 4, deformation key 5 etc..Wherein, due to transition on turn-screw 2
The setting of set 4 and deformation key 5 so that be flexible connection between driving member 1 and lead screw pair, driving member 1 is while moving horizontally
Also can in vertical direction up and down, the trickle movement in left and right so that additional radial power is not transferred on turn-screw 2, prevents from passing
There is cyclic deformation in radial directions in dynamic leading screw 2.
Embodiments of the invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that bright specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is included within the scope of the present invention.
Claims (9)
1. a kind of precision drive leading screw flexible connection is secondary, it is characterised in that be set in the biography including turn-screw (2), fixation
Spacer shell (4) on the nut (3) of dynamic leading screw (2) and be embedded on the spacer shell (4) for matching somebody with somebody with driving member (1)
The deformation key (5) of conjunction, the axial direction of the parallel leading screw (2) of length direction of deformation key (5)；
It is described deformation key (5) including the fixed part (51) being embedded in the spacer shell (4) and for the driving member
(1) connecting portion (52) for coordinating, the opposite sides of the connecting portion (52) is respectively equipped with the driving member (1) linear contact lay half
Circle portion (53)；
The spacer shell (4) includes the columnar part (41) and shoulder (42) of annular, and the shoulder (42) is integrally formed in described
In the first end of columnar part (41)；Space or the columnar part (41) and shoulder between the columnar part (41) and shoulder (42)
The periphery in portion (42) forms and is arranged holding part thereon for the driving member (1), the method for the shoulder (42) and the nut (3)
Lan Duan is abutted, and the shoulder (42) is provided with the through hole that several confession securing members wear；Deformation key (5) is embedded in the column
In portion (41) and/or shoulder (42).
2. precision drive leading screw flexible connection according to claim 1 is secondary, it is characterised in that the half-round (53) is in institute
State on the length direction of connecting portion (52), it is outwardly from the opposite sides of the connecting portion (52)；
The upper surface of the connecting portion (52) between half-round described in two (53) is plane.
3. precision drive leading screw flexible connection according to claim 1 is secondary, it is characterised in that the precision drive leading screw is flexible
Auxiliary connection also includes the standby tight nut (6) for being pushed against the driving member (1) on the holding part, the standby tight nut
(6) it is set on second end relative with the first end of the columnar part (41).
4. precision drive leading screw according to claim 3 flexible connection is secondary, it is characterised in that the of the spacer shell (4)
Two ends periphery are provided with the external screw thread with standby tight nut (6) screw-internal thread fit.
5. precision drive leading screw flexible connection according to claim 3 is secondary, it is characterised in that the precision drive leading screw is flexible
Auxiliary connection be also included in it is described it is standby between tight nut (6) and driving member (1), be set in it is standby on the end of the spacer shell (4) second
Tight set (7).
6. the precision drive leading screw flexible connection according to any one of claim 1-5 is secondary, it is characterised in that the spacer shell
(4) and it is described deformation key (5) be rigid member.
7. the precision drive leading screw flexible connection pair and transmission described in any one of a kind of transmission mechanism, including claim 1-6
Part (1), the precision drive leading screw flexible connection is secondary to be connected and drives the driving member (1) mobile；
The secondary spacer shell (11) of the correspondence precision drive leading screw flexible connection and deformation key on the connection end of the driving member (1)
(11) slotted eye (12) for being provided with connecting hole (11) and connecting with the connecting hole (11), the slotted eye (12) is from the connecting hole
(11) inwall extends away from the central axis direction of the connecting hole (11)；The driving member (1) is with the connecting hole
(11) it is set on the spacer shell (4), the connecting portion (52) of deformation key (5) coordinates in the slotted eye (12), and institute
State the half-round (53) of deformation key (5) and the inwall brought into linear contact of the slotted eye (12).
8. transmission mechanism according to claim 7, it is characterised in that the internal face of the connecting hole (11) and the transition
Millimetre-sized gap is left between the circumferential lateral surface of set (4).
9. transmission mechanism according to claim 7, it is characterised in that the bottom surface of the slotted eye (12) and the connecting portion
(52) millimetre-sized gap is left between upper surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510281855.0A CN104948694B (en) | 2015-05-28 | 2015-05-28 | Precision drive lead screw flexible connecting pair and drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510281855.0A CN104948694B (en) | 2015-05-28 | 2015-05-28 | Precision drive lead screw flexible connecting pair and drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104948694A CN104948694A (en) | 2015-09-30 |
| CN104948694B true CN104948694B (en) | 2017-05-10 |
Family
ID=54163613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510281855.0A Active CN104948694B (en) | 2015-05-28 | 2015-05-28 | Precision drive lead screw flexible connecting pair and drive mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN104948694B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6186268B1 (en) * | 1998-01-20 | 2001-02-13 | Mitsuba Corporation | Electric power steering unit |
| CN101462234A (en) * | 2007-12-21 | 2009-06-24 | 威海华东数控股份有限公司 | Flexible feed screw apparatus |
| CN101629593A (en) * | 2009-07-28 | 2010-01-20 | 西安东风仪表厂 | Flexible connecting device of ball screw assembly |
| CN201963825U (en) * | 2011-04-02 | 2011-09-07 | 西安工业大学 | Screw flexible hinge connection device |
| CN202392065U (en) * | 2011-12-16 | 2012-08-22 | 西安凤城精密机械有限公司 | Nut ball screw assembly |
| CN102678866A (en) * | 2012-05-25 | 2012-09-19 | 西北工业大学 | Planetary roller screw assembly |
| CN204805459U (en) * | 2015-05-28 | 2015-11-25 | 广西防城港核电有限公司 | Vice and drive mechanism of accurate turnscrew flexonics |
-
2015
- 2015-05-28 CN CN201510281855.0A patent/CN104948694B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6186268B1 (en) * | 1998-01-20 | 2001-02-13 | Mitsuba Corporation | Electric power steering unit |
| CN101462234A (en) * | 2007-12-21 | 2009-06-24 | 威海华东数控股份有限公司 | Flexible feed screw apparatus |
| CN101629593A (en) * | 2009-07-28 | 2010-01-20 | 西安东风仪表厂 | Flexible connecting device of ball screw assembly |
| CN201963825U (en) * | 2011-04-02 | 2011-09-07 | 西安工业大学 | Screw flexible hinge connection device |
| CN202392065U (en) * | 2011-12-16 | 2012-08-22 | 西安凤城精密机械有限公司 | Nut ball screw assembly |
| CN102678866A (en) * | 2012-05-25 | 2012-09-19 | 西北工业大学 | Planetary roller screw assembly |
| CN204805459U (en) * | 2015-05-28 | 2015-11-25 | 广西防城港核电有限公司 | Vice and drive mechanism of accurate turnscrew flexonics |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104948694A (en) | 2015-09-30 |
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