CN105840752B - Limited travel ball screw - Google Patents
Limited travel ball screw Download PDFInfo
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- CN105840752B CN105840752B CN201510013778.0A CN201510013778A CN105840752B CN 105840752 B CN105840752 B CN 105840752B CN 201510013778 A CN201510013778 A CN 201510013778A CN 105840752 B CN105840752 B CN 105840752B
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Abstract
The invention discloses a kind of limited travel ball screw, mainly screw rod is set in comprising nut, multiple balls are configured between nut and screw rod, for each ball towards during exit axis displacement, each ball is to exit fast ratio in axial displacement speed relative to screw rod in axial velocity of displacement divided by nut relative to screw rod；And each ball, towards during load direction displacement, each ball is load speed ratio in axial displacement speed relative to screw rod in axial velocity of displacement divided by nut relative to screw rod；Fast ratio is exited at the same time is less than load speed ratio, each ball is set to stop towards the final energy contact stops of exit axis displacement accordingly, and towards stop part can be departed from during load direction displacement towards another end movement, it will not be stopped by stop part and increase frictional resistance, reduce the resistance of each ball displacement in load accordingly；Ensure that single unit system can achieve the purpose that to stablize really to contribute；And the entirety composition of the present invention is simple in structure, can reduce production difficulty, increase economic efficiency, and increase product reliability.
Description
Technical field
The present invention provides a kind of limited travel ball screw, it is related with linear actuator.
Background technology
Ball screw is a kind of important linear actuator, and the drive characteristic for possessing high efficiency and high precision makes its quilt
Widely apply on various conveying mechanicals；And general ball screw mainly includes and a nut is worn outside a screw rod, and the spiral shell
Then house multiple balls in helicla flute between bar and the nut abutting contact, the ball screw of such a form in running,
Contact and friction between each ball can produce the resistance of operation.
Therefore, and there is a kind of ball screw 10 of form as shown in Figure 1, it similarly includes a screw rod 11 and a nut
12, multiple balls 13 are set therebetween, and difference is to set a columnar ball to protect between the screw rod 11 and the nut 12
Holding sleeve 14, the ball keep the side face of sleeve 14 to have multiple ball retaining holes 141, each ball 13 is limited to respectively accordingly
In ball retaining hole 141, isolate each ball 13 accordingly, making not contact with each other between each ball 13 produces resistance.However, due to whole
After body device continued operation, which keeps sleeve 14 and the relative position of nut 12 gradually to deviate, and causes 13 displacement of ball
To outside the region of payload, the load that nut 12 can be born is reduced, or even ball 13 may drop, and cause nut 12 and spiral shell
There is no the dangerous situation of ball 13 between bar 11.
And be then as shown in Figure 2 the ball screw 20 of another form, 20 main member of ball screw is identical, that is, includes
There are a screw rod 21, a nut 22 and the multiple balls 23 being arranged between screw rod 21 and nut 22, and be again provided with a ball
Sleeve 24 is kept to keep ball 23, and the ball screw 20 more sets a barrier structure 25 respectively at its 22 both ends of nut, leads to
Crossing the barrier structure 25 and placing restrictions on ball 23 not be moved to outside effective load area.However, when the barrier structure 25 contacts
Ball 23 or ball keep sleeve 24 to play and place restrictions on effect, and prevent ball 23 or ball from keeping sleeve 24 relative to 22 axis of nut
To during displacement, the slip ratio of each ball 23 will be significantly increased, from it is most of be that rolling is transformed into most of be slip, and slip rubs
50 times that resistance is about the rolling frictional resistance of ball screw are wiped, therefore when barrier structure 25 contacts ball 23 or ball holding set
When effect is placed restrictions in the performance of cylinder 24, the frictional resistance of ball screw 20 will also be significantly increased therewith, and cause overall mechanical efficiency
Decline to a great extent, make the output of integrated model be remarkably decreased or even cause the function of low friction resistance to fail to be pushed away
The critical conditions of dynamic mechanism occur, that is, the mistake on mechanical action occurs.
For another example Fig. 3 is then the ball screw 30 of still another form, between the screw rod 31 and nut 32 of the ball screw 30
Sleeve 33 is kept to place restrictions on multiple balls 34 by ball, and one end of the nut 32 shapes a stop section 321 and places restrictions on ball holding
Sleeve 33 is by setting one end of stop section 321 to deviate from, and ball keeps setting a spring between sleeve 33 and stop section 321
35, which combines ball and keeps sleeve 33 to ensure that ball keeps the position of sleeve 33, and the ball is kept sleeve 33
Can elastic displacement it be placed in nut 32.The left end of screw rod 31 connects a brake shoes A, when to be braked, screw rod 31 relative to
Nut 32 is moved to the left and drives brake shoes A to be moved to the left and contacted with corresponding piece B, and screw rod 31 is continuously applied a load and exists
On brake shoes A, make between brake shoes A and corresponding piece B have a very big positive force (i.e. screw rod 31 is continuously applied on brake shoes A
Load), and make to produce a very big brake weight between brake shoes A and corresponding piece B, when not braking, screw rod 31 is relative to nut 32
Move right and drive brake shoes A to move right, and separate brake shoes A and corresponding piece B, brake shoes A and screw rod 31 are all no longer
Bear foregoing load (i.e. positive force).Defining a load direction D2 can make for screw rod 31 relative to nut 32 towards direction movement
31 bearing load of screw rod continues to increase and reaches the direction of peak load, i.e. in Fig. 3, screw rod 31 is moved to the left relative to nut 32
And the direction for driving brake shoes A to brake is load direction D2, and it is reversely defined as exit axis D1, then screw rod 31 relative to
Ball 34 can bear a peak load when nut 32 is moved to the left and drives brake shoes A brakes, and spring 35 protects ball at this time
The active force (thrust) of holding sleeve 33 is also maximum, and the active force of the spring 35 can keep the displacement of sleeve 33 to cause to limit on ball
System, and the ball keeps the displacement of sleeve 33 to be forced to limit the axial displacement that then can also limit between ball 34 and nut 32,
The frictional resistance of ball 34 is added, and it is therefore identical with the design shortcoming of Fig. 2, the mechanical effect of integrated model can be reduced and gone out
Power.Moreover applied to the ball screw 30 shown in Fig. 3 for the aspect of brake system, when 31 band of screw rod of ball screw 30
When dynamic brake shoes A contributes, in the case of the output of demand brake shoes A maximums, spring 35 is subject to the compressing force of maximum, and at the same time
Maximum reverse elastic force is produced, and then directly offsets the output of integrated model, the basic nothing under the service condition of the big output of demand
Method is applicable in, and influences safety in utilization.In addition, under the continued operation of 30 integrated model of ball screw, spring 35 will produce
Elastic fatigue, the situation of elastic fatigue, and cause mechanism-trouble or change the situation that can not be expected of screw stroke, therefore should
The running stability of ball screw 30 still has greatly improvement space.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of limited travel ball screw, and its main purpose is to improve
Mechanical effect existing for general ball screw or structural stability missing to be improved.
In order to solve the above technical problem, the present invention provides limited travel ball screw, it is axial along one comprising a screw rod
Development length, and the outer surface of the screw rod has an external spiral groove, the vertical axial direction is defined as one radially；One nut, along institute
State and axially open up a sets of holes, and the set internal surface of hole sets an inner spiral groove, the nut can be set in spiral shell axially displacedly
Outside bar, and make rollably to house multiple balls between the external spiral groove and inner spiral groove；And one end of the nut is by covering
Hole it is radially inwardly extending set a stop part, and define by nut the other end towards the direction of stop part be exit axis,
By stop part towards the direction of the other end of nut be load direction；
Each ball is defined towards during exit axis displacement, each ball is relative to screw rod in axial velocity of displacement divided by nut
Relative to screw rod in axial displacement speed to exit fast ratio；Each ball is defined towards during load direction displacement, each ball relative to
Screw rod is load speed ratio in axial displacement speed relative to screw rod in axial velocity of displacement divided by nut；And described exit fast ratio
Less than the load speed ratio, make screw rod towards during exit axis displacement, each ball displacement and finally contact the stop part and stop
Only, and screw rod towards during load direction displacement, respectively the ball departs from the stop part and avoids each ball from being blocked and increase friction resistance
Power.
After the present invention mainly makes integrated model stable by above-listed rate limitation, each ball is towards exit axis displacement
When terminate at stop part, and each ball drops accordingly towards can then depart from stop part during load direction displacement towards another end movement
The resistance of low each ball displacement in load, it is ensured that single unit system can achieve the purpose that accurate stable is contributed.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of existing ball screw；
Fig. 2 is the structure diagram of another existing ball screw；
Fig. 3 is the structure diagram of another existing ball screw；
Fig. 4 is the structure diagram of limited travel ball screw of the present invention；
Fig. 5 is the 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 embodiment of sleeve；
Figure 10 is that the ball of limited travel ball screw of the present invention keeps sleeve another embodiment；
Figure 11 is that the ball of limited travel ball screw of the present invention keeps sleeve more another embodiment again；
Figure 12 is that the ball of limited travel ball screw of the present invention keeps the end face schematic cross-sectional view of sleeve；
Figure 13 is that the ball of limited travel ball screw of the present invention keeps the end face sectional structure of sleeve is another to implement to illustrate
It is intended to；
Figure 14 is that the ball of limited travel ball screw of the present invention keeps the end face sectional structure another embodiment of sleeve
Schematic diagram.
Wherein the reference numerals are as follows：
10 screw rod 11 of ball screw
12 ball 13 of nut
Ball keeps 14 ball retaining hole 141 of sleeve
20 screw rod 21 of ball screw
22 ball 23 of nut
Ball keeps 24 barrier structure 25 of sleeve
30 screw rod 31 of ball screw
32 stop section 321 of nut
Ball keeps 33 ball 34 of sleeve
35 brake shoes A of spring
Corresponding piece B
40 external spiral groove 41 of screw rod
50 sets of holes 51 of nut
511 stop part 52 of inner spiral groove
Anti- ball comes off 53 ball 60 of part
Ball keeps 70 inner face 71 of sleeve
72 ball limiting unit 73 of outside
74 frictional layer 74A of friction element
Friction portion 74B loads part 80
Axial X
Exit axis D1
The first relative displacements of load direction D2 V1
Second relative displacement V2 exits speed and compares VR1
Load speed exits contact point T1 than VR2
Load contact point T2 normal Ns 1
Normal N 2 exits contact angle α
Load contact angle β
Embodiment
To enable auditor to have a better understanding and awareness the purpose of the present invention, feature and effect, below hereby
It please coordinate【Brief description of drawings】It is described in detail as after.
The preferred embodiment of limited travel ball screw of the present invention as shown in Fig. 4 to 12, comprising：
One screw rod 40, along an axial direction X development lengths, and the outer surface of the screw rod 40 has an external spiral groove 41；It is and vertical
Axial X is defined as a radial direction Y；
One nut 50, X opens up a sets of holes 51 vertically, and 51 inner surface of sets of holes sets an inner spiral groove 511, nut 50
It X can with displacement be set in outside screw rod 40, and make rollably accommodating multiple between external spiral groove 41 and inner spiral groove 511 vertically
Ball 60；One end of nut 50 is extended internally by sets of holes 51 sets a stop part 52, and defines the other end direction by nut 50
The direction of the stop part 52 is exit axis D1, conversely, by nut 50 stop part 52 towards nut 50 the other end direction
For load direction D2；And the other end of nut 50 more sets an anti-ball to come off part 53, which comes off the radially Y-direction of part 53
Inside extend into sets of holes 51, the anti-ball of the present embodiment part 53 that comes off is a spiral lock, is avoided by the anti-ball part 53 that comes off
Ball 60 is deviate from；
And setting is when ball screw running and ball 60 is towards during exit axis D1 displacements, each ball 60 is relative to the screw rod
40 have one first relative displacement V1 in axial X, and nut 50 has one second opposite position relative to screw rod 40 in axial X
Move speed V2, and each ball 60 is towards during exit axis D1 displacements, each ball 60 relative to screw rod 40 axial X velocity of displacement
Divided by nut 50 relative to screw rod 40 in axial X velocity of displacements to exit speed than VR1, i.e., each ball 60 is towards exit axis D1
V1/V2=VR1 during shifting；Each ball 60 is defined towards during load direction D2 displacements, each ball 60 is relative to screw rod 40 axial X's
Velocity of displacement divided by nut 50 are load speed than VR2 in axial X velocity of displacements relative to screw rod 40, i.e., each ball 60 is towards load
V1/V2=VR2 during the D2 displacements of direction；And this exits speed and is less than the load speed than VR2 than VR1, makes screw rod 40 towards exit axis D1
During displacement, each 60 displacement of ball and finally contact the stop part 52 and stop, therefore towards during exit axis D1 displacements, ball
60 position is stopped and positioned by stop part 52, can avoid ball 60 towards the area that payload is moved to during load direction D2 displacements
Cause danger outside domain, or come off part 53 because touching anti-ball and increase frictional resistance；And screw rod 40 is towards load side
To during D2 displacements, each ball 60 departs from stop part 52 and avoids each ball 60 from increasing frictional resistance because of being blocked.Accordingly,
It can make each ball 60 towards during exit axis D1 displacements, each ball 60 during exit axis D1 displacements towards can finally touch
Stop part 52, when each ball 60 touches stop part 52 then with regard to that can be limited to abut against the settling position of stop part 52, at this time
Load between non-load condition ball 60 and nut 50 or screw rod 40 is minimum, the positive force very little of friction, although therefore ball
Sliding scale increase between 60 and nut 50 or screw rod 40, may make friction coefficient between ball 60 and nut 50 or screw rod 40
Increase, but and it is unlikely to the counter productive for causing frictional resistance excessive.What deserves to be explained is even if the present invention is completed just
When, each ball 60 is towards can not touch stop part 52 during exit axis D1 displacements, but the limit of the above-listed fast ratio due to the present invention
System, therefore there is no method to place restrictions under 52 situation of stop part in ball 60, running each time can all make each ball 60 closer to
The stop part 52 of the nut 50, finally all makes ball 60 place restrictions in the state of stop part 52 with regard to that can reach in running each time,
Namely optimal operating status.
Conversely, when ball screw running and ball 60 is towards during load direction D2 displacements, the first relative displacement V1 with
The ratio of second relative displacement V2 is load speed than VR2, and load speed is more than than VR2 and exits speed than VR1, this represents phase
Compared with each ball 60 towards during exit axis D1 displacements, each ball 60 is fast towards the first relative displacement of load direction D2 displacements
Degree V1 is smaller or the second relative displacement V2 is bigger；Accordingly, each ball 60 will be more towards the nut with respect to the position of nut 50
50 other end direction displacement, it is ensured that each ball 60 departs from by being butted on the position of stop part 52, and avoids each ball 60 because of contact
In the resistance to displacement that stop part 52 produces, the resistance to displacement of each ball 60 is reduced accordingly.
And the present invention takes off the means of velocity conditions and can then be reached by setting the contact angle of each ball 60 to reach, its
In, as shown in figure 5, in each ball 60 towards during exit axis D1 displacements, each ball 60 and external spiral groove 41 and inner spiral groove 511
One is produced respectively and exits contact point T1, this, which is exited between the normal N 1 of contact point T1 and radial direction Y, has one to exit contact angle α；Instead
It, for each ball 60 towards during load direction D2 displacements, it is negative that each ball 60 with external spiral groove 41 and inner spiral groove 511 produces one respectively
There is a load contact angle β between the normal N 2 and radial direction Y of lotus contact point T2, load contact point T2；And set in this condition
Under, the ratio of the first relative displacement V1 and the second relative displacement V2 are：
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 be illustrated in figure 6 applicant with the pitch diameter ratio scope of ball diameter and screw rod between 0~0.9
What difference exited that contact angle α calculates exit data result of the speed than VR1 (V1/V2), the transverse axis in Fig. 6 to exit contact angle α,
The longitudinal axis is exits speed than VR1 (V1/V2), and on the premise of the diameter of each ball 60 can not possibly be less than 0, the results show exits fast ratio
VR1 (V1/V2) is permanent to be more than 0.5.
Further, 60 diameter of ball of general ball screw and the pitch diameter ratio of screw rod 40 are about 0.2, are such as schemed
7 show using the numerical value progress analog reslt that the pitch diameter ratio of 60 diameter of ball and screw rod 40 is 0.217, Fig. 7's
Transverse axis exits contact angle α for each ball 60, and the longitudinal axis is fast than VR1 (V1/V2) to exit, from the point of view of analog result, in load
On the premise of contact angle β is constant, 5 degree of contact angle α increases are exited in order can make the running speed that exits of the present invention than VR1 (V1/V2)
More than possibility of the load speed than VR2；And being exited if order if contact angle α increases by 10 degree can more make the present invention is running to exit fast ratio
VR1, which is more than possibility of the load speed than VR2, more to be increased；Accordingly, the contact angle α that exits for setting this example is more than load contact angle β,
And 5 degree of the difference ＞ of contact angle α and load contact angle β is exited, and if exiting the difference ＞ 10 of contact angle α and load contact angle β
Degree, then effect is more notable.
In addition, in order to reduce collision or friction between each ball 60 in ball screw, more can be in nut 50 and screw rod
A ball is set to keep sleeve 70 between 40, it is inner face 71 which, which keeps the one side of sleeve 70 towards screw rod 40, towards nut
50 one side is outside 72, which keeps through multiple ball limiting units 73 are set on the side face of sleeve 70, and each ball limits
Portion 73, which can be illustrated in figure 8, can wear the circular hole of single ball 60, along carrying over internal thread groove or external thread groove direction opens up
Elliptical aperture (such as Fig. 9), the slot hole (such as Figure 10) of X extensions vertically carry over internal thread groove or external thread groove side for that can wear at the same time
The hole shape (such as Figure 11) of multiple balls 60, each ball 60 are placed in each ball limiting unit 73 on upward multiple balls 60 and axial direction X
It is interior to isolate ball 60 and ball 60, reduce collision or friction between each ball 60.
And the present invention for reach take off the means of velocity conditions then can be by varying the frictional resistance between opposed member
Reach, wherein, as shown in Figure 12~Figure 14, the present invention is main to be designed to make ball keep the resistance between sleeve 70 and screw rod 40
The resistance between sleeve 70 and nut 50 is kept more than ball；And reaching makes ball keep the resistance between sleeve 70 and screw rod 40 to be more than
Ball keeps the means of the resistance between sleeve 70 and nut 50 then can include following manner again：
First, make ball keep sleeve 70 maximum outside diameter be less than nut 50 internal diameter, make ball keep sleeve 70 not with
Nut 50 contacts and reduces the resistance between ball holding sleeve 70 and nut 50；
Second, make the internal diameter that ball keeps sleeve 70 become ellipse, and the maximum inner diameter for making ball keep sleeve 70 is big
In the outside diameter of screw rod 40, and minimum diameter contact 40 outside diameter of screw rod, ball is set to keep at the minimum diameter of sleeve 70 and spiral shell accordingly
Bar 40 produces frictional resistance to improve the resistance between ball holding sleeve 70 and screw rod 40；And
Third, keeping the inner face 71 of sleeve 70 to set a friction element 74 in ball, which is for high friction
Count and a frictional layer 74A (such as Figure 13) of frictional resistance can be improved, improve ball accordingly and keep between sleeve 70 and screw rod 40
Resistance；And friction element 74 or the friction portion 74B (such as Figure 14) of multiple out-of-flatnesses, 70 inner face 71 of sleeve is kept by ball
Friction portion 74B improve and screw rod 40 between resistance.
It is the structural configuration and feature of limited travel ball screw of the present invention above, each 60, ball is mainly made by setting
It is less than each nut 50 relative to the velocity of displacement of screw rod 40 relative to the velocity of displacement of screw rod 40 during shifting, makes each 60 court of ball accordingly
Can progressively it be moved to during exit axis D1 displacements towards 52 direction of stop part of nut 50, and towards during exit axis D1 displacements
Stop part 52 can finally be touched to place restrictions in settling position；And each ball 60 during load direction D2 displacements towards can then depart from only
Block piece 52 reduces the resistance of each displacement in load of ball 60 towards another end movement accordingly；Ensure that single unit system can reach true
The purpose contributed in fact.
Further, since the present invention reaches by varying the contact angle of each ball 60, keeps sleeve 70 by varying ball
Shape, size are reached or by keeping the inner face 71 of sleeve 70 to set a friction element 74 to reach in ball, reached purpose
Technological means is the form by varying component, without in addition assembling extra component with regard to that can reach, therefore is reached main
The technological means of purpose is unrelated with assembling, in addition to it can reduce the difficulty in manufacture, reduce manufacture cost, can more improve system
Journey, the stability of quality, and the use wish of consumer is improved accordingly, create the economic benefit of higher.
In conclusion the various embodiments described above and diagram are only presently preferred embodiments of the present invention, it is impossible to restrictions
The scope implemented is invented, i.e., the equivalent changes and modifications made generally according to scope of the present invention patent, should all belong to of the invention special
In the range of profit covers.
Claims (10)
1. a kind of limited travel ball screw, comprising a screw rod, the outer surface along an axial extension, and the screw rod has
One external spiral groove, the vertical axial direction are defined as one radially；One nut, a sets of holes, and the set internal surface of hole are opened up along the axial direction
One inner spiral groove is set, and the nut can be set in outside screw rod axially displacedly, and makes the external spiral groove and inner spiral groove
Between rollably house multiple balls；And one end of the nut by sets of holes it is radially inwardly extending set a stop part, and
Definition is exit axis towards the direction of stop part by the other end of nut, and the direction by stop part towards the other end of nut is
Load direction；It is characterized in that：
Each ball is defined towards during exit axis displacement, each ball is opposite in axial velocity of displacement divided by nut relative to screw rod
In screw rod in axial displacement speed to exit fast ratio；Each ball is defined towards during load direction displacement, each ball is relative to screw rod
Relative to screw rod it is load speed ratio in axial displacement speed in axial velocity of displacement divided by nut；And the speed ratio that exits is less than
The load speed ratio, makes screw rod towards during exit axis displacement, each ball displacement and finally contacts the stop part and stops, and
For screw rod towards during load direction displacement, each ball departs from stop part.
2. limited travel ball screw as claimed in claim 1, it is characterised in that each ball is relative to screw rod in axial direction
With one first relative displacement, and the nut axially has one second relative displacement relative to screw rod, each rolling
For pearl towards the first relative displacement during exit axis displacement divided by the second relative displacement to exit fast ratio, this exits fast ratio
＞ 0.5.
3. limited travel ball screw as claimed in claim 1, it is characterised in that each ball is towards exit axis displacement
When, each ball produces one with external spiral groove and inner spiral groove and exits contact point, the normal for exiting contact point and radial direction respectively
Between have and one exit contact angle α；And each ball is towards during load direction displacement, each ball and external spiral groove and inner spiral groove point
A load contact point is not produced, there is a load contact angle β between the normal and radial direction of the load contact point, and described exit connects
Feeler is more than the load contact angle, and exits 5 degree of the difference ＞ of contact angle and load contact angle.
4. limited travel ball screw as claimed in claim 1 a, it is characterised in that rolling is set between the nut and screw rod
Pearl keeps sleeve, and it is inner face that the ball, which keeps the one side of sleeve towards screw rod, and the one side towards nut is outside, the ball
Keep through multiple ball limiting units are set on the side face of sleeve, each ball is limited in the ball limiting unit；And the rolling
Pearl keeps the resistance that the resistance between sleeve and screw rod is more than between ball holding sleeve and nut.
5. limited travel ball screw as claimed in claim 4, it is characterised in that the ball keeps the maximum outside diameter of sleeve
Less than the internal diameter of nut.
6. limited travel ball screw as claimed in claim 4, it is characterised in that it is ellipse that the ball, which keeps the internal diameter of sleeve,
Circle, and make ball keep the maximum inner diameter of sleeve to be more than the outside diameter of screw rod, and minimum diameter contacts outer screw diameter.
7. limited travel ball screw as claimed in claim 4, it is characterised in that the ball keeps the inner face of sleeve to set
One friction element, the friction element are a frictional layer.
8. limited travel ball screw as claimed in claim 4, it is characterised in that the ball keeps the inner face of sleeve to set
One friction element, the friction element are the friction portion of multiple out-of-flatnesses.
9. limited travel ball screw as claimed in claim 1 a, it is characterised in that rolling is set between the nut and screw rod
Pearl keeps sleeve, and the ball is kept through multiple ball limiting units are set on the side face of sleeve, and each ball is limited in the rolling
In pearl limiting unit；The ball limiting unit is to carry over internal thread groove or elliptical aperture that external thread groove direction opens up.
10. limited travel ball screw as claimed in claim 1, it is characterised in that set one between the nut and screw rod
Ball keeps sleeve, and the ball is kept through multiple ball limiting units are set on the side face of sleeve, and each ball is limited in described
In ball limiting unit；The ball limiting unit is the slot 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 CN105840752A (en) | 2016-08-10 |
| CN105840752B true CN105840752B (en) | 2018-04-17 |
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ID=57178093
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 |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105840752B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6747239B2 (en) * | 2016-10-25 | 2020-08-26 | アイシン精機株式会社 | Suspension damping force control device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6418807B2 (en) * | 2000-03-06 | 2002-07-16 | Tol-O-Matic, Inc. | Stabilizer for ball screw actuator |
-
2015
- 2015-01-12 CN CN201510013778.0A patent/CN105840752B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105840752A (en) | 2016-08-10 |
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