CN105840752A - Limited travel ball screw - Google Patents
Limited travel ball screw Download PDFInfo
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- CN105840752A CN105840752A CN201510013778.0A CN201510013778A CN105840752A CN 105840752 A CN105840752 A CN 105840752A CN 201510013778 A CN201510013778 A CN 201510013778A CN 105840752 A CN105840752 A CN 105840752A
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Abstract
The invention discloses a limited travel ball screw. The limited travel ball screw includes a nut; the nut sleeves the a screw; a plurality of balls are arranged between the nut and the screw; when all the balls displace in an exit direction, the displacement speed relative to the screw in the axial direction, of all the balls, is divided by the displacement speed relative to the screw in the axial direction of the nut to obtain an exit speed ratio; when all the balls displace in a load direction, the displacement speed relative to the screw in the axial direction, of all the balls, is divided by the displacement speed relative to the screw in the axial direction of the nut to obtain a load speed ratio, and meanwhile the exit speed ratio is less than the load speed ratio, and in this way, all the balls displace in the exit direction, contact a stop member and then stop move finally; when all the balls displace in the load direction, all the balls can depart from the stop member and displace toward another end, and then all the balls will not block by the stop member, and the friction resistance will not be increased, and in this way, the resistance of all the balls during displacement in the load direction can be decreased, and it is ensured that the whole limited travel ball screw can achieve stable output; and the whole limited travel ball screw is simple in structure, can lower the difficulty of production, improve the economic benefits, and improve the reliability of the products.
Description
Technical field
The present invention provides a kind of limited travel ball screw, and it is relevant with linear actuator.
Background technology
Ball screw is a kind of important linear actuator, and the drive characteristic possessing high efficiency and high precision makes its quilt
Apply to widely on various conveying mechanical；And general ball screw mainly comprises and wears a nut outside a screw rod, and
Then housing multiple ball in helicla flute between this screw rod and this nut, the ball screw of this kind of form exists abutting contact
During running, contact between each ball and friction can produce the resistance of operation.
Therefore, there is again the ball screw 10 of a kind of form as it is shown in figure 1, it similarly comprises screw rod 11 and a spiral shell
Cap 12, arranges therebetween multiple ball 13, and difference is between this screw rod 11 and this nut 12 to arrange a cylinder
The ball of shape keeps sleeve 14, and this ball keeps the side face of sleeve 14 to have multiple ball retaining hole 141, makes accordingly
Each ball 13 can be limited in each ball retaining hole 141, isolates each ball 13 accordingly, makes between each ball 13 the most mutual
Contact produces resistance.But, owing to, after single unit system continued operation, this ball keeps sleeve 14 and nut 12
Can gradually offset relative to position, cause ball 13 to be displaced to outside the region of payload, reduce nut 12 and can bear
Load, even ball 13 may drop, and causes the dangerous situation not having ball 13 between nut 12 and screw rod 11.
Being the most then the ball screw 20 of another kind of form, this ball screw 20 main member is identical, i.e.
Include screw rod 21, nut 22 and the multiple balls 23 being arranged between screw rod 21 and nut 22, and equally
Be provided with one ball keep sleeve 24 to keep ball 23, and this ball screw 20 more its nut 22 two ends distinguish
One barrier structure 25 is set, places restrictions on outside ball 23 is not moved to effective load area by this barrier structure 25.
But, keep sleeve 24 to play placing restrictions on effect when this barrier structure 25 contacts ball 23 or ball, and stop ball
23 or ball keep sleeve 24 relative to nut 22 axial displacement time, the slip ratio of each ball 23 will be significantly increased,
From major part be rolling be transformed into major part for slide, and sliding-frictional resistance be about ball screw rolling friction resistance
50 times of power, therefore when barrier structure 25 contacts ball 23 or ball keeps sleeve 24 performance to place restrictions on effect, ball
The frictional resistance of screw rod 20 also will be significantly increased therewith, and cause the mechanical efficiency of entirety to decline to a great extent, and make integrated machine
The exerting oneself of structure is remarkably decreased even causes the function of low frictional resistance to fail to promote the tight of mechanism to be promoted
Weight condition occurs, and the mistake on mechanical action i.e. occurs.
For another example Fig. 3 is then the ball screw 30 of still another form, screw rod 31 and the nut 32 of this ball screw 30
Between keep sleeve 33 to place restrictions on multiple ball 34 by ball, and one end of this nut 32 shapes a stop section 321
Placing restrictions on ball keeps sleeve 33 to be deviate from by the one end arranging stop section 321, and ball keeps sleeve 33 and stop section 321
Between a spring 35 is set again, this spring 35 combine ball keep sleeve 33 with guarantee ball keep sleeve 33 position
Put, and make this ball keep sleeve 33 to be placed in elastic displacement in nut 32.The left end of screw rod 31 connects one
Brake shoes A, when time to be braked, screw rod 31 be moved to the left relative to nut 32 and drive brake shoes A to be moved to the left and
Contact with corresponding piece B, and screw rod 31 is continuously applied a load on brake shoes A, makes brake shoes A and corresponding piece B
Between have a biggest positive force (i.e. screw rod 31 is continuously applied the load on brake shoes A), and make brake shoes A and phase
To producing a biggest brake weight between part B, when not braking, screw rod 31 moves right relative to nut 32 and drives
Brake shoes A moves right, and makes brake shoes A and corresponding piece B separate, and brake shoes A and screw rod 31 are all not subjected to
Aforesaid load (i.e. positive force).Defining load direction D2 is that screw rod 31 moves towards the direction relative to nut 32
Screw rod 31 can be made to bear based model for load duration increase and reach the direction of peak load, i.e., in Fig. 3, screw rod 31 is relative to spiral shell
The direction that cap 32 is moved to the left and drives brake shoes A to brake is load direction D2, and it is reversely defined as exit axis
D1, then when screw rod 31 is moved to the left relative to nut 32 and drives brake shoes A to brake, ball 34 can bear one
Big load, and now spring 35 keeps active force (thrust) the also maximum of sleeve 33 to ball, this spring 35
Ball can be kept the displacement of sleeve 33 to cause restriction by active force, and this ball keeps the displacement of sleeve 33 to be forced limit
System the most also can limit the axial displacement between ball 34 and nut 32, adds the frictional resistance of ball 34, and because of
This is identical with the design shortcoming of Fig. 2, can reduce the mechanical effect of integrated model and exert oneself.Moreover, shown in Fig. 3
For ball screw 30 applies to the aspect of brake system, when the screw rod 31 of ball screw 30 drives brake shoes A to go out
During power, demand brake shoes A maximum exert oneself in the case of, spring 35 is by maximum compressing force, and produces simultaneously
Raw maximum reverse elastic force, and then directly offset exerting oneself of integrated model, basic under the service condition that demand is exerted oneself greatly
Cannot be suitable for, affect safety in utilization.Additionally, under the continued operation of this ball screw 30 integrated model, spring
35 situations that will produce elastic fatigue, elastic fatigue, and cause mechanism-trouble or change cannot expecting of screw stroke
Situation occurs, and therefore the running stability of this ball screw 30 still has and improves space greatly.
Summary of the invention
The technical problem to be solved is to provide a kind of limited travel ball screw, and its main purpose is to improve
Mechanical effect that general ball screw exists or structural stability disappearance to be improved.
In order to solve above-mentioned technical problem, the limited travel ball screw that the present invention provides, comprise a screw rod, along an axle
To development length, and the outer surface of described screw rod has an external spiral groove, and vertically this is axially defined as one radially；One spiral shell
Cap, along a described trepanning of axially offering, and this set internal surface of hole arranges an inner spiral groove, and described nut can position vertically
It is set in outside screw rod with moving, and makes rollably to house between described external spiral groove and inner spiral groove multiple ball；And institute
State one end of nut by the radially inwardly extending stop part that arranges of trepanning, and define by the other end of nut towards backstop
The direction of part is exit axis, stop part be load direction towards the direction of the other end of nut；
When defining each ball towards exit axis displacement, each ball relative to screw rod at axial velocity of displacement divided by nut
Relative to screw rod at axial velocity of displacement for exiting speed ratio；When defining each ball towards load direction displacement, each ball phase
It is load speed ratio relative to screw rod at axial velocity of displacement divided by nut at axial velocity of displacement for screw rod；And it is described
Exit speed ratio less than described load speed ratio, when making screw rod towards exit axis displacement, each ball displacement and finally contact institute
State stop part and stop, and screw rod towards load direction displacement time, respectively this ball departs from this stop part and avoids each ball to be subject to
Stop and increase frictional resistance.
The present invention is mainly limited by above-listed speed after making integrated model stable, and each ball is towards exit axis displacement
Time terminate at stop part, each ball towards then departing from stop part during load direction displacement towards other end displacement, according to
This reduces each ball resistance of displacement when load, it is ensured that single unit system can reach the purpose that accurate stable is exerted oneself.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of existing ball screw；
Fig. 2 is the structural representation of another kind of existing ball screw；
Fig. 3 is the structural representation of another existing ball screw；
Fig. 4 is the structural representation of limited travel ball screw of the present invention；
Fig. 5 is ball and inner spiral groove, the relativeness schematic diagram of external spiral groove of limited travel ball screw of the present invention；
Fig. 6 is the datagram of limited travel ball screw of the present invention；
Fig. 7 is another datagram of limited travel ball screw of the present invention；
Fig. 8 is that the ball of limited travel ball screw of the present invention keeps sleeve schematic diagram；
Fig. 9 is that the ball of limited travel ball screw of the present invention keeps another enforcement aspect of sleeve；
Figure 10 is that the ball of limited travel ball screw of the present invention keeps sleeve yet another enforcement aspect；
Figure 11 is that the ball of limited travel ball screw of the present invention keeps sleeve the most more another enforcement aspect；
Figure 12 is the end face sectional structure schematic diagram of the ball holding sleeve of limited travel ball screw of the present invention；
Figure 13 is another enforcement aspect of end face sectional structure of the ball holding sleeve of limited travel ball screw of the present invention
Schematic diagram；
Figure 14 is end face sectional structure yet another enforcement state of the ball holding sleeve of limited travel ball screw of the present invention
Sample schematic diagram.
Wherein description of reference numerals is as follows:
Ball screw 10 screw rod 11
Nut 12 ball 13
Ball keeps sleeve 14 ball retaining hole 141
Ball screw 20 screw rod 21
Nut 22 ball 23
Ball keeps sleeve 24 barrier structure 25
Ball screw 30 screw rod 31
Nut 32 stop section 321
Ball keeps sleeve 33 ball 34
Spring 35 brake shoes A
Corresponding piece B
Screw rod 40 external spiral groove 41
Nut 50 trepanning 51
Inner spiral groove 511 stop part 52
Anti-ball comes off part 53 ball 60
Ball keeps sleeve 70 inner face 71
Outside 72 ball limiting units 73
Friction element 74 frictional layer 74A
Friction part 74B load part 80
Axially X
Exit axis D1
Load direction D2 the first relative displacement V1
Second relative displacement V2 exits speed ratio VR1
Load speed ratio VR2 exits contact point T1
Load contact point T2 normal N 1
Normal N 2 exits contact angle α
Load contact angle beta
Detailed description of the invention
For enabling auditor the purpose of the present invention, feature and effect to be had a better understanding and awareness, the most hereby
[brief description of drawingsfig] please be coordinate to describe in detail such as after.
The preferred embodiment of limited travel ball screw of the present invention, if Fig. 4 is to shown in 12, comprises:
One screw rod 40, along an axial X development length, and the outer surface of this screw rod 40 has an external spiral groove 41；And
Vertical axial X is defined as a radial direction Y；
One nut 50, X offers a trepanning 51 vertically, and this trepanning 51 inner surface arranges an inner spiral groove 511,
Nut 50 can be set in outside screw rod 40 by X vertically with displacement, and makes between external spiral groove 41 and inner spiral groove 511
Rollably house multiple ball 60；One end of nut 50 is extended internally by trepanning 51 and arranges a stop part 52, and
Defining by the other end of nut 50 towards the direction of this stop part 52 is exit axis D1, otherwise, by nut 50
Stop part 52 is load direction D2 towards the direction of the other end of nut 50；And the other end of nut 50 more arranges one
Anti-ball comes off part 53, and this anti-ball comes off and extends in trepanning 51 in part 53 radially Y-direction, the present embodiment anti-
The ball part 53 that comes off is a spiral lock, avoids ball 60 to deviate from by this anti-ball part 53 that comes off；
And set when ball screw running and ball 60 are towards exit axis D1 displacement, each ball 60 is relative to this
Screw rod 40 has one first relative displacement V1 at axial X, and nut 50 has at axial X relative to screw rod 40
Have an one second relative displacement V2, and each ball 60 towards exit axis D1 displacement time, each ball 60 relative to
Screw rod 40 at the velocity of displacement of axial X divided by nut 50 relative to screw rod 40 at axial X velocity of displacement for exiting speed
Ratio VR1, the most each ball 60 is towards V1/V2=VR1 during exit axis D1 displacement；Define each ball 60 towards load side
When D2 displacement, each ball 60 relative to screw rod 40 at the velocity of displacement of axial X divided by nut 50 relative to screw rod
40 is load speed ratio VR2 at axial X velocity of displacement, and the most each ball 60 is towards V1/V2=VR2 during the displacement of load direction D2；
And this exits speed ratio VR1 less than this load speed ratio VR2, when making screw rod 40 towards exit axis D1 displacement, each ball 60
Displacement and finally contact this stop part 52 and stop, therefore when towards exit axis D1 displacement, the position of ball 60
Put and stopped by stop part 52 and position, when can avoid ball 60 towards the displacement of load direction D2, move to payload
Cause danger outside region, or because touch anti-ball and come off part 53 and increase frictional resistance；And screw rod 40
During towards the displacement of load direction D2, each ball 60 departs from stop part 52 and avoids each ball 60 to increase because of being blocked
Frictional resistance.Accordingly, just can make each ball 60 when towards exit axis D1 displacement, each ball 60 is towards moving back
Stop part 52 finally can be touched during outgoing direction D1 displacement, then just can quilt when each ball 60 touches stop part 52
Place restrictions in the settling position abutting against stop part 52, be now non-load condition ball 60 and nut 50 or screw rod 40
Between load minimum, the positive force of friction is the least, although therefore slip between ball 60 and nut 50 or screw rod 40
Ratio increases, and coefficient of friction between ball 60 and nut 50 or screw rod 40 may be made to increase, but and be unlikely to cause
The counter productive that frictional resistance is excessive.What deserves to be explained is, even if the present invention is when being just completed, each ball 60
Stop part 52 cannot be touched during towards exit axis D1 displacement, but the restriction of the above-listed speed ratio due to the present invention, because of
This there is no method at ball 60 and places restrictions under stop part 52 situation, and running each time all can make each ball 60 more lean on
The stop part 52 of this nut 50 nearly, finally just can reach all to make ball 60 place restrictions in stop part in running each time
The state of 52, the most optimal running status.
Otherwise, when ball screw running and ball 60 are towards the displacement of load direction D2, the first relative displacement V1
It is load speed ratio VR2 with the ratio of the second relative displacement V2, and load speed ratio VR2 is more than exiting speed ratio VR1,
When this i.e. represents compared to each ball 60 towards exit axis D1 displacement, each ball 60 is towards this load direction D2 position
The the first relative displacement V1 moved is the least or the second relative displacement V2 is the biggest；Accordingly, each ball 60 is relative
The position of nut 50 will be more towards the other end direction displacement of this nut 50, it is ensured that the disengaging of each ball 60 abuts against in only
The position of block piece 52, and avoid each ball 60 because being contacted with the resistance to displacement that stop part 52 produces, reduce each accordingly
The resistance to displacement of ball 60.
The present invention is that the means reached and take off velocity conditions then can be reached by setting the contact angle of each ball 60, its
In, as it is shown in figure 5, when each ball 60 is towards exit axis D1 displacement, each ball 60 and external spiral groove 41 and
Inner spiral groove 511 produces one respectively and exits contact point T1, has between this normal N 1 exiting contact point T1 and radial direction Y
Exit contact angle α；Otherwise, when each ball 60 is towards the displacement of load direction D2, each ball 60 and external spiral
Groove 41 and inner spiral groove 511 produce normal N 2 and the radial direction of a load contact point T2, this load contact point T2 respectively
There is between Y a load contact angle beta；And under this condition sets, the first relative displacement V1 and second relative
The ratio of velocity of displacement V2 is:
V1/V2=(PCD+cos (α) * BD)/(2*PCD)
Wherein, PCD represents the pitch diameter of screw rod 40；And BD represents the diameter of each ball 60.
And it is illustrated in figure 6 applicant's pitch diameter ratio scope with ball diameter and screw rod between 0～0.9
Exiting, in difference, the data result exiting speed ratio VR1 (V1/V2) that contact angle α calculates, the transverse axis in Fig. 6 is for moving back
Going out contact angle α, the longitudinal axis is for exiting speed ratio VR1 (V1/V2), and the diameter at each ball 60 can not be less than the premise of 0
Under, result shows that exiting speed ratio VR1 (V1/V2) perseverance is more than 0.5.
Further, ball 60 diameter of general ball screw and the pitch diameter ratio of screw rod 40 are about 0.2,
It is illustrated in figure 7 and is simulated test with the numerical value that pitch diameter ratio is 0.217 of ball 60 diameter with screw rod 40
As a result, the transverse axis of Fig. 7 be each ball 60 exit contact angle α, and the longitudinal axis is for exiting speed ratio VR1 (V1/V2), with
From the point of view of analog result, on the premise of load contact angle beta is constant, contact angle α increase by 5 degree is exited in order can make the present invention
The operating speed ratio VR1 (V1/V2) that exits is more than the possibility of load speed ratio VR2；And if making and exit contact angle α increase
10 degree the most more can make the operating speed ratio VR1 probability more than load speed ratio VR2 that exits of the present invention more increase；According to
This, the contact angle α that exits setting this example contacts angle beta more than load, and exits contact angle α and contact angle beta with load
Difference ＞ 5 degree, and if exit contact angle α and contact difference ＞ 10 degree of angle beta with load, then effect is the most notable.
Additionally, in order to reduce the collision between each ball 60 in ball screw or friction, more can be at nut 50 and spiral shell
Arranging a ball between bar 40 and keep sleeve 70, this ball keeps sleeve 70 to be inner face 71 towards the one side of screw rod 40,
One side towards nut 50 is outside 72, and this ball keeps running through on the side face of sleeve 70 arranging multiple ball limiting unit
73, each ball limiting unit 73 can be illustrated in figure 8 and can wear the circular hole of single ball 60, along carrying over female thread groove
Or external screw thread groove direction offer elliptical aperture (such as Fig. 9), vertically X extend elongated hole (such as Figure 10) or for can wear simultaneously
Set carries over the hole shape of multiple balls 60 on female thread groove or external screw thread groove direction and axial upper multiple balls 60 of X (as schemed
11), it is interior with isolation ball 60 and ball 60 that each ball 60 is placed in each ball limiting unit 73, reduces each ball 60
Between collision or friction.
And the present invention to be the means reached and take off velocity conditions then can be come by the frictional resistance changing between opposed member
Reaching, wherein, as shown in Figure 12～Figure 14, the present invention is mainly designed so that ball keeps sleeve 70 and screw rod
Resistance between 40 keeps the resistance between sleeve 70 and nut 50 more than ball；And reach make ball keep sleeve 70 with
Resistance between screw rod 40 keeps the means of the resistance between sleeve 70 and nut 50 can comprise the most again following side more than ball
Formula:
One, makes ball keep the maximum outside diameter internal diameter less than nut 50 of sleeve 70, makes ball keep sleeve 70
Do not contact with nut 50 and reduce ball and keep the resistance between sleeve 70 and nut 50；
Its two, make ball keep the internal diameter of sleeve 70 to become oval, and make ball keep the maximum inner diameter of sleeve 70
More than the external diameter of screw rod 40, and minimum diameter contact screw rod 40 external diameter, make ball keep the minimum of sleeve 70 accordingly
Inner radius and screw rod 40 produce frictional resistance and keep the resistance between sleeve 70 and screw rod 40 to improve ball；And
Its three, ball keep sleeve 70 inner face 71 friction element 74 is set, this friction element 74 rubs for height
Wipe coefficient and a frictional layer 74A (such as Figure 13) of frictional resistance can be improved, improve ball accordingly and keep sleeve 70 and spiral shell
Resistance between bar 40；And friction element 74 is alternatively multiple irregular friction part 74B (such as Figure 14), by rolling
Pearl keeps the friction part 74B of sleeve 70 inner face 71 to improve the resistance between screw rod 40.
It is more than structural configuration and the feature of limited travel ball screw of the present invention, mainly makes each ball 60 by setting
During displacement relative to the velocity of displacement of screw rod 40 less than each nut 50 relative to the velocity of displacement of screw rod 40, make accordingly
Each ball 60 can stop part 52 direction towards nut 50 move progressively towards during exit axis D1 displacement, and in court
Stop part 52 finally can be touched to place restrictions in settling position when exit axis D1 displacement；And each ball 60 towards
Then can depart from stop part 52 during the displacement of load direction D2 towards other end displacement, reduce each ball 60 accordingly at load
The resistance of Shi Weiyi；Guarantee that single unit system can reach the purpose really exerted oneself.
Additionally, due to the present invention reaches, by changing ball holding sleeve 70 by changing the contact angle of each ball 60
Shape, size reach or by keeping the inner face 71 of sleeve 70 to arrange a friction element 74 and reach at ball,
The technological means reaching purpose is all the form by changing component, just can reach without additionally assembling extra component
Becoming, the technological means therefore reaching main purpose is unrelated with assembling, except reducing the difficulty on manufacturing, reduce manufacture
Outside cost, more can improve the stability of processing procedure, quality, and improve the use wish of consumer accordingly, create higher
Economic benefit.
In sum, the various embodiments described above and diagram are only presently preferred embodiments of the present invention, it is impossible to restrictions
The scope that invention is implemented, the equalization the most generally made according to scope of the present invention patent changes and modifies, all should belong to this
In the range of bright patent contains.
Claims (10)
1. a limited travel ball screw, comprises a screw rod, along an axial extension, and outside described screw rod
Surface has an external spiral groove, and vertically this is axially defined as one radially；One nut, axially offers a trepanning along described,
And this set internal surface of hole arranges an inner spiral groove, described nut can be set in outside screw rod axially displacedly, and makes described
Multiple ball is rollably housed between external spiral groove and inner spiral groove；And one end of described nut by trepanning radially to
In an extended stop part, and to define by the other end of nut towards the direction of stop part be exit axis, by backstop
Part is load direction towards the direction of the other end of nut；It is characterized in that:
When defining each ball towards exit axis displacement, each ball relative to screw rod at axial velocity of displacement divided by nut
Relative to screw rod at axial velocity of displacement for exiting speed ratio；When defining each ball towards load direction displacement, each ball phase
It is load speed ratio relative to screw rod at axial velocity of displacement divided by nut at axial velocity of displacement for screw rod；And it is described
Exit speed ratio less than described load speed ratio, when making screw rod towards exit axis displacement, each ball displacement and finally contact institute
State stop part and stop, and screw rod towards load direction displacement time, each ball depart from stop part.
2. limited travel ball screw as claimed in claim 1, it is characterised in that described each ball is relative to spiral shell
Bar axially has one first relative displacement, and described nut axially has one second phase para-position relative to screw rod
Move speed, each ball towards the first relative displacement during exit axis displacement divided by the second relative displacement for exiting
Speed ratio, this exits speed ratio ＞ 0.5.
3. limited travel ball screw as claimed in claim 1, it is characterised in that described each ball is towards exiting
During the displacement of direction, each ball and external spiral groove and inner spiral groove produce one respectively and exit contact point, described in exit contact point
Normal and radially between have and exit contact angle α；And each ball towards load direction displacement time, each ball is with outer
Helicla flute and inner spiral groove produce a load contact point respectively, have one between normal and the radial direction of described load contact point
Load contact angle beta, described in exit contact angle more than described load contact angle, and exit contact angle and load contact angle
Difference ＞ 5 degree.
4. limited travel ball screw as claimed in claim 1, it is characterised in that between described nut and screw rod
Arranging a ball and keep sleeve, described ball keeps sleeve to be inner face towards the one side of screw rod, and the one side towards nut is
Outside, described ball keeps running through on the side face of sleeve arranging multiple ball limiting unit, and each ball is limited in described ball
In limiting unit；And described ball keeps the resistance between sleeve and screw rod to keep the resistance between sleeve and nut more than ball.
5. limited travel ball screw as claimed in claim 4, it is characterised in that described ball keeps sleeve
Maximum outside diameter is less than the internal diameter of nut.
6. limited travel ball screw as claimed in claim 4, it is characterised in that described ball keeps sleeve
Internal diameter is oval, and makes ball keep the maximum inner diameter external diameter more than screw rod of sleeve, and minimum diameter contacts screw rod
External diameter.
7. limited travel ball screw as claimed in claim 4, it is characterised in that described ball keeps sleeve
Inner face arranges a friction element, and described friction element is a frictional layer.
8. limited travel ball screw as claimed in claim 4, it is characterised in that described ball keeps sleeve
Inner face arranges a friction element, and described friction element is multiple irregular friction parts.
9. limited travel ball screw as claimed in claim 1, it is characterised in that between described nut and screw rod
Arranging a ball and keep sleeve, described ball keeps running through on the side face of sleeve arranging multiple ball limiting unit, each ball
It is limited in described ball limiting unit；Described ball limiting unit is to carry over female thread groove or that external screw thread groove direction is offered is ellipse
Circular hole.
10. limited travel ball screw as claimed in claim 1, it is characterised in that between described nut and screw rod
Arranging a ball and keep sleeve, described ball keeps running through on the side face of sleeve arranging multiple ball limiting unit, each ball
It is limited in described ball limiting unit；Described ball limiting unit is the elongated hole axially extended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510013778.0A CN105840752B (en) | 2015-01-12 | 2015-01-12 | Limited travel ball screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510013778.0A CN105840752B (en) | 2015-01-12 | 2015-01-12 | Limited travel ball screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105840752A true CN105840752A (en) | 2016-08-10 |
| CN105840752B CN105840752B (en) | 2018-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510013778.0A Active CN105840752B (en) | 2015-01-12 | 2015-01-12 | Limited travel ball screw |
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| Country | Link |
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| CN (1) | CN105840752B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180111439A1 (en) * | 2016-10-25 | 2018-04-26 | Aisin Seiki Kabushiki Kaisha | Damping force control apparatus for suspension |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010025534A1 (en) * | 2000-03-06 | 2001-10-04 | Gladen Paul B. | Stabilizer for ball screw actuator |
| US6761080B2 (en) * | 2000-04-27 | 2004-07-13 | Thomson Saginaw Ball Screw Co., Llc | Multiple stage, multiple extend, speed reducing ball screw linear actuator and method of constructing and operating the actuator |
| TW200718875A (en) * | 2005-11-02 | 2007-05-16 | Abba Linear Tech Co Ltd | Ball screw for high load and with limited travel |
| CN103511575A (en) * | 2012-06-18 | 2014-01-15 | 上银科技股份有限公司 | Ball screw device integrating dust prevention and lubrication |
-
2015
- 2015-01-12 CN CN201510013778.0A patent/CN105840752B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20010025534A1 (en) * | 2000-03-06 | 2001-10-04 | Gladen Paul B. | Stabilizer for ball screw actuator |
| US6761080B2 (en) * | 2000-04-27 | 2004-07-13 | Thomson Saginaw Ball Screw Co., Llc | Multiple stage, multiple extend, speed reducing ball screw linear actuator and method of constructing and operating the actuator |
| TW200718875A (en) * | 2005-11-02 | 2007-05-16 | Abba Linear Tech Co Ltd | Ball screw for high load and with limited travel |
| CN103511575A (en) * | 2012-06-18 | 2014-01-15 | 上银科技股份有限公司 | Ball screw device integrating dust prevention and lubrication |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180111439A1 (en) * | 2016-10-25 | 2018-04-26 | Aisin Seiki Kabushiki Kaisha | Damping force control apparatus for suspension |
| US10625558B2 (en) * | 2016-10-25 | 2020-04-21 | Aisin Seiki Kabushiki Kaisha | Damping force control apparatus for suspension |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105840752B (en) | 2018-04-17 |
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