CN207139283U - Without impact ballscrew auxiliary supporting device - Google Patents
Without impact ballscrew auxiliary supporting device Download PDFInfo
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- CN207139283U CN207139283U CN201720585269.XU CN201720585269U CN207139283U CN 207139283 U CN207139283 U CN 207139283U CN 201720585269 U CN201720585269 U CN 201720585269U CN 207139283 U CN207139283 U CN 207139283U
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- pressing plate
- screw
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- 238000003825 pressing Methods 0.000 claims abstract description 54
- 230000035772 mutation Effects 0.000 claims abstract description 16
- 230000001133 acceleration Effects 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 claims description 10
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 230000003321 amplification Effects 0.000 description 2
- 238000003199 nucleic acid amplification method Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application provides one kind without impact ballscrew auxiliary supporting device, including：The curved surface pressing plate being arranged on moving parts bottom surface；It is fixedly installed on the support body on bed piece and below the ball-screw；The connecting plate connected with the support body by elastomeric element, so that the connecting plate can move towards or away from the support body；The first roller for being used to below the ball-screw support being arranged on the connecting plate；The second roller being arranged on the connecting plate.When the curved surface pressing plate and the second roller of the auxiliary support apparatus are in contactless state, the elastomeric element is in diastole state, and first roller and the ball-screw contact with each other, to support the ball-screw；When the two is in contact condition, the elastomeric element is in compressive state, second roller mutation without speed all the time during contacting with each other, also nonaccelerated mutation, and first roller does not contact with each other with the feed screw nut.
Description
Technical field
Digit ctrol machine tool field is the utility model is related to, more particularly to a kind of Auxiliary support for long span ball-screw fills
Put.
Background technology
Ball-screw has the advantages that accurate, efficient, the steady, long-life as a kind of helicoidal gear, and it can be by directly
Line motion is mutually changed with gyration, while also has the amplification of power, i.e., turns into small revolving force (torque) amplification
Big thrust, therefore be widely used in high-grade, digitally controlled machine tools and be used to.But when ball-screw is more than 5m (such as gantry boring-mill work
The X straight-line feeds axle at center), ball-screw when will be due to self gravitation or rotation larger inertia force effect and produce compared with
Big deformation, obvious shake and noise are produced during so as to cause leading screw secondary motion, can not only shorten spring bearing and leading screw sheet
The service life of body, but also machine tool motion precision and machining accuracy can be reduced, influence the use of lathe.
As shown in figure 1, the inclination angle of in general inclined-plane pressing plate is α, always produced when the second roller is touched on pressing plate inclined-plane certain
Impact, impact occurs mainly in moment when roller will be contacted and disengaged with pressing plate inclined-plane.If pressing plate is with leading screw spiral shell
It is x that mother, which does the direction to move along a straight line, and the movement velocity of pressing plate is D ms/min, and the direction of motion of roller is z, it is assumed that the pressure of roller
Indention journey is A millimeters, and roller and pressing plate are in t1Moment starts to contact, now presser motion to position x1Place, roller z to position
Move as 0；In t2Moment presser motion is to position x2Place, now roller be compressed to extreme position, i.e., roller z to displacement be
A；In t3Moment roller starts to discharge, and starts to contact with the inclined-plane of pressing plate, now presser motion to position x3Place；In t4Moment
Roller starts to depart from pressing plate, now presser motion to position x4Place, roller z to displacement revert to zero.Roller is relative to pressure
Plate x to motion can be represented with equation below：
Z=(1000/60 × D × t
Roller relative to pressing plate z to motion can be represented with equation below：
Two formulas are that can obtain the equation of locus of inclined-plane pressing plate above simultaneous.Above formula roller relative to pressing plate z to motion
Primary and secondary derivative is sought t respectively, and can obtain roller is to the speed and acceleration equation of motion in z relative to pressing plate：
By above-mentioned rollers relative to pressing plate z to moving displacement, speed, acceleration be depicted as curve as shown in Fig. 2 can
To find out in t1、t2、t3、t4Moment z can not be led, i.e. displacement is continuous, and speed has mutation, and acceleration is infinity in theory, is produced
Infinitely great inertia force, mechanism will produce great impact, and this impact is rigid shock.For be reduced or eliminated impact, it is necessary to
Seek new method to be designed to pressing plate.
Utility model content
In view of shock problem present in prior art, the utility model provides a kind of without impact ball-screw Auxiliary support
Device, the ball-screw have the move portion for being arranged on feed screw nut and following the feed screw nut synchronous linear motion
Part, it is characterised in that including：
The curved surface pressing plate being arranged on the moving parts bottom surface；
It is fixedly installed on the support body on bed piece and below the ball-screw；
The connecting plate connected with the support body by elastomeric element, so that the connecting plate can be towards or away from the frame
Body moves；
The first roller for being used to below the ball-screw support being arranged on the connecting plate；
The second roller being arranged on the connecting plate, the curved surface pressing plate and second roller have contactless state
And contact condition：
When the two is in contactless state, the elastomeric element is in diastole state, first roller and the rolling
Ballscrew contacts with each other, to support the ball-screw；
When the two is in contact condition, the elastomeric element is in compressive state, and second roller is mutual at the two
All the time the mutation without speed during contact, also nonaccelerated mutation, first roller not with the feed screw nut phase
Mutually contact.
The utility model is provided with elastomeric element between connecting plate and support body, under general work state, in spring-return
So that the first roller and ball-screw that are fixed on connecting plate fully contact in the presence of power, play a part of Auxiliary support.
When feed screw nut will pass through auxiliary support apparatus, the second roller rolls in the presence of curved surface pressing plate together with connecting plate and first
Wheel is moved away from the direction of leading screw together, and elastomeric element is compressed, and the first roller departs from and ball-screw, makes feed screw nut
Smoothly, smoothly through auxiliary support apparatus.After feed screw nut is by auxiliary support apparatus, the second roller along curved surface pressing plate by
Gradually recover to be gradually brought to diastole state to original state, elastomeric element so that the first roller recovers to support leading screw again.The
Mutation (no rigid shock) in the contact process of second wheel and curved surface pressing plate all the time without speed, it is also nonaccelerated to be mutated (nothing
Soft impulse).
In some embodiments of the present utility model, the curved surface pressing plate and second roller are entered by contactless state
When entering contact condition or entering contactless state by contact condition, first roller is towards or away from the support body direction
Movement velocity and acceleration without mutation.
In some embodiments of the present utility model, the direction of rotation of first roller and the rotation of the ball-screw
Turn in opposite direction；The direction of rotation of second roller is identical with the moving direction of the feed screw nut.
In some embodiments of the present utility model, the support body includes bottom plate and is vertically arranged on the bottom plate
Lead；A part for the elastomeric element is sheathed on the lead, and its another part is fixedly connected with the connecting plate.
Elastomeric element in present embodiment can use spring, be filled with the mechanical ball-screw Auxiliary support of realization
Put, without electric, hydraulic pressure or pneumatic control, and the flexible modulation of spring compression force size can be realized by increasing adjusting pad.
In some embodiments of the present utility model, the lead at least has two, and is symmetrically dispersed in institute
State on bottom plate；First roller has two, and when first roller and the ball-screw contact with each other, its is symmetrical
It is distributed in lower left side and the lower right side of the ball-screw；Second roller has two, and it is symmetrically arranged at the company
The both ends of fishplate bar.
In some embodiments of the present utility model, the compression travel of second roller is A millimeters；The curved surface pressure
Length of the plate along the direction of motion is B millimeters, movement velocity is D ms/min, then fortune of second roller along the curved surface pressing plate
The dynamic time is T=(60 × B)/(1000 × D) second；During according to boundary condition (1) t=0, z=0,(2) t=T
When, z=A, ；(3) roller is along x to for linear uniform motion x=(1000 × D × t)/60, wherein, described in z is represented
The displacement of second roller；Represent the movement velocity of second roller；Represent the acceleration of motion of second roller；
Then the working curved surface of the curved surface pressing plate meets equation of locus：
Z=6A × B-5×x5-15A×B-4×x4+10A×B-3×x3。
Present embodiment uses for reference cam design principle, is obtained according to without displacement, speed, the constraints of acceleration when impacting
The surface equation of pressing plate.
In some embodiments of the present utility model, the theory locus of the central point of second roller in curved surface pressing plate
On line, coordinate is P (x, z), radius R, and the coordinate of corresponding points is P ' (x ', z ') on the working curved surface of the curved surface pressing plate, then
The working curved surface of the curved surface pressing plate meets following relationship：
Present embodiment obtains pressing plate surface equation using analytic method.
Brief description of the drawings
Fig. 1 is general inclined-plane presser motion relation schematic diagram；
Fig. 2 is the displacement of general inclined-plane pressing plate ballscrew auxiliary supporting device motion, speed, acceleration plots；
Fig. 3 is that the structural representation without impact ballscrew auxiliary supporting device is provided in the embodiment of the utility model one
Figure；
Fig. 4 is the structural representation of curved surface pressing plate；
Fig. 5 be the second roller along z to move displacement z, speedAnd accelerationCurve map.
Embodiment
In order that the purpose, technical scheme and advantage of utility model are clearer, below in conjunction with the accompanying drawings and specific embodiment
Utility model is described in further detail.Although disclosure exemplary embodiment is shown in accompanying drawing, it being understood, however, that
The utility model be may be realized in various forms without should be limited by embodiments set forth here.Conversely, there is provided these implementations
Example is to be able to more thorough explanation the utility model, and the scope of the utility model can be completely communicated into ability
The technical staff in domain.
As shown in figure 3, the embodiment of the utility model one provide without impact ballscrew auxiliary supporting device, its is main
Including curved surface pressing plate 1, support body 2, connecting plate 3, elastomeric element 4, the first roller 5, the second roller 6.The ball-screw 7, which has, to be set
Put on feed screw nut 8 and follow the moving parts 9 of the synchronous linear of feed screw nut 8 motion, i.e., the moving parts 9 is with leading screw
The rotation of nut 8 and moved along a straight line along ball-screw 7.
Curved surface pressing plate 1 is arranged on the bottom surface of moving parts 9.Support body 2 is fixedly arranged on bed piece and is located at silk
The lower section of thick stick nut 8.Connecting plate 3 is connected by elastomeric element 4 and support body 2, to enable connecting plate 3 toward and away from frame
Body 2 moves.First roller 5 is arranged on connecting plate 3, and it can be supported to ball-screw 7 from below under normal conditions.Second
Roller 6 is arranged on connecting plate 3, and it can be extruded by curved surface pressing plate 1, and then promotes connecting plate 3 to move downward.
During work, the above-mentioned roller 6 of curved surface pressing plate 1 and second has contactless state and contact condition, when the two is in non-
During contact condition, elastomeric element 4 is in diastole state, and the first roller 5 and ball-screw 7 contact with each other, to realize for ball
The support of leading screw 7.When the two is in contact condition, curved surface pressing plate 1 oppresses the second roller 6 and promotes connecting plate 3 to move downward, bullet
Property part 4 is in compressive state, and the first roller 5 no longer contacts with each other with ball-screw 7, in this case, no matter the second roller 6
Any position of curved surface pressing plate 1 is moved to, it is for support force caused by curved surface pressing plate 1 on vertically and horizontally
Component without suddenly change (no mutation), i.e. the second roller 6 mutation without speed all the time and nonaccelerated in the process
Mutation, with this overcome the vertical component of the power in the prior art either the unlimited or limited mutation of horizontal component and caused by
Rigid shock or soft impulse.
If the compression travel of second roller 6 is A (mm), length of the curved surface pressing plate 1 along the direction of motion is B
(mm) when, movement velocity is D (m/min), then run duration T=(60 × B)/(1000 × D) (s) of curved surface pressing plate 1, to avoid
Rigid shock and soft impulse (also can be selected sinusoidal acceleration characteristics of motion, i.e. cycloidal motion, ask from quintic algebra curve
Solution method is similar) it is the characteristics of motion of second roller 6 along z to (vertical direction as shown in Figure 3), according to boundary condition：(1)t
When=0, z=0,(2) during t=T, z=A,(3) roller is along x to for linear uniform motionTherefore the theory locus equation that can obtain curved surface pressing plate 1 is：
Z=6A × B-5×x5-15A×B-4×x4+10A×B-3×x3
Secondary derivation is carried out to above formula can obtain the second roller 6 along z to the speed and acceleration moved, the second roller 6 along z to
The displacement z of motion, speedAnd accelerationCurve is as shown in figure 5, there it can be seen that speedWithout prominent in motion process
Become, illustrate no rigid shock, same to brief accelerationAlso illustrate also without soft impulse without mutation in motion process.
The central point of second roller is on the theory locus line of curved surface pressing plate, and coordinate is P (x, z), radius R, the song
The coordinate of corresponding points is P ' (x ', z ') on the working curved surface of face pressure plate, then the working curved surface of the curved surface pressing plate meets following pass
System：
Above formula is the equation of pressing plate working curved surface, it can thus be concluded that to the coordinate value each put on pressing plate working curved surface, such as
Shown in Fig. 4.It should be noted that when being processed using Digit Control Machine Tool, tool radius is necessarily less than or equal to roller radius R.
In addition, the roller 6 of curved surface pressing plate 1 and second is entered contact condition by contactless state or entered by contact condition non-
During contact condition, the first roller 5 is in the movement velocity towards or away from the direction of support body 2 and acceleration without mutation.
In some embodiments of the present utility model, the direction of rotation of the first roller 5 and the direction of rotation of ball-screw 7
On the contrary, the direction of rotation of the second roller 6 is identical with the moving direction of feed screw nut 8.
In some embodiments of the present utility model, support body 2 includes bottom plate 21 and is vertically arranged in leading on bottom plate 21
To post 22.Elastomeric element 4 uses spring, and one part is sheathed on lead 22, and the bottom surface of its another part and connecting plate 3 is consolidated
Fixed connection.Lead 22 at least has two, and is symmetrically dispersed on bottom plate 21.First roller 5 has two, when the first rolling
When wheel 5 and ball-screw 7 contact with each other, it is symmetrically distributed in the lower left side of ball-screw 7 and lower right side.Second roller 6 has
There are two, it is symmetrically arranged at the both ends of connecting plate 3.
Finally it should be noted that above example is only illustrating the technical solution of the utility model and nonrestrictive.
Although the utility model is described in detail with reference to embodiment, it should be appreciated by those of ordinary skill in the art that to this
The technical scheme of utility model is modified or equivalent substitution, without departure from the spirit and model of technical solutions of the utility model
Enclose, it all should cover among right of the present utility model.
Claims (7)
1. without impact ballscrew auxiliary supporting device, the ball-screw, which has, to be arranged on feed screw nut and follows the silk
The moving parts of thick stick nut synchronous linear motion, it is characterised in that including：
The curved surface pressing plate being arranged on the moving parts bottom surface；
It is fixedly installed on the support body on bed piece and below the ball-screw；
The connecting plate connected with the support body by elastomeric element, so that the connecting plate can be transported towards or away from the support body
It is dynamic；
The first roller for being used to below the ball-screw support being arranged on the connecting plate；
The second roller being arranged on the connecting plate, the curved surface pressing plate and second roller have contactless state and connect
The state of touching：
When the two is in contactless state, the elastomeric element is in diastole state, first roller and the ball wire
Thick stick contacts with each other, to support the ball-screw；
When the two is in contact condition, the elastomeric element is in compressive state, and second roller is in the mistake to contact with each other
All the time the mutation without speed in journey, also nonaccelerated mutation, first roller do not contact with each other with the feed screw nut.
It is 2. according to claim 1 without impact ballscrew auxiliary supporting device, it is characterised in that：
The curved surface pressing plate and second roller enter contact condition by contactless state or enter non-connect by contact condition
During the state of touching, first roller is in the movement velocity towards or away from the support body direction and acceleration without mutation.
It is 3. according to claim 1 without impact ballscrew auxiliary supporting device, it is characterised in that：
The direction of rotation of first roller and the direction of rotation of the ball-screw are opposite；
The direction of rotation of second roller is identical with the moving direction of the feed screw nut.
It is 4. according to claim 3 without impact ballscrew auxiliary supporting device, it is characterised in that：
The support body includes bottom plate and the lead being vertically arranged on the bottom plate；
A part for the elastomeric element is sheathed on the lead, and its another part is fixedly connected with the connecting plate.
It is 5. according to claim 4 without impact ballscrew auxiliary supporting device, it is characterised in that：
The lead at least has two, and is symmetrically dispersed on the bottom plate；
First roller has two, and when first roller and the ball-screw contact with each other, it is symmetrical to be distributed
Lower left side and lower right side in the ball-screw；
Second roller has two, and it is symmetrically arranged at the both ends of the connecting plate.
It is 6. according to claim 1 without impact ballscrew auxiliary supporting device, it is characterised in that：
The compression travel of second roller is A millimeters；
Length of the curved surface pressing plate along the direction of motion is B millimeters, movement velocity is D ms/min, then second roller is along institute
The run duration for stating curved surface pressing plate is T=(60 × B)/(1000 × D) second；
During according to boundary condition (1) t=0, z=0,When, z=A,Roller is along x
To for linear uniform motionWherein, z represents the displacement of second roller；Represent second roller
Movement velocity；Represent the acceleration of motion of second roller；
Then the theoretical curved surface of the curved surface pressing plate meets equation of locus：
Z=6A × B-5×x5-15A×B-4×x4+10A×B-3×x3。
It is 7. according to claim 1 without impact ballscrew auxiliary supporting device, it is characterised in that：
The central point of second roller is on the theory locus line of curved surface pressing plate, and coordinate is P (x, z), radius R, the song
The coordinate of corresponding points is P ' (x ', z ') on the working curved surface of face pressure plate, then the working curved surface of the curved surface pressing plate meets following pass
System：
。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585269.XU CN207139283U (en) | 2017-05-24 | 2017-05-24 | Without impact ballscrew auxiliary supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720585269.XU CN207139283U (en) | 2017-05-24 | 2017-05-24 | Without impact ballscrew auxiliary supporting device |
Publications (1)
| Publication Number | Publication Date |
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| CN207139283U true CN207139283U (en) | 2018-03-27 |
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ID=61659341
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720585269.XU Active CN207139283U (en) | 2017-05-24 | 2017-05-24 | Without impact ballscrew auxiliary supporting device |
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| Country | Link |
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| CN (1) | CN207139283U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975938A (en) * | 2017-05-24 | 2017-07-25 | 沈机集团昆明机床股份有限公司 | Without impact ballscrew auxiliary supporting device |
-
2017
- 2017-05-24 CN CN201720585269.XU patent/CN207139283U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106975938A (en) * | 2017-05-24 | 2017-07-25 | 沈机集团昆明机床股份有限公司 | Without impact ballscrew auxiliary supporting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 650203 No. 23 Dam Road, Yunnan, Kunming Patentee after: General technology Group Kunming Machine Tool Co.,Ltd. Address before: 650203 No. 23 Dam Road, Yunnan, Kunming Patentee before: SHENJI GROUP KUNMING MACHINE TOOL Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |