CN209511045U - Ball-screw - Google Patents
Ball-screw Download PDFInfo
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- CN209511045U CN209511045U CN201920084457.3U CN201920084457U CN209511045U CN 209511045 U CN209511045 U CN 209511045U CN 201920084457 U CN201920084457 U CN 201920084457U CN 209511045 U CN209511045 U CN 209511045U
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- groove
- ball
- screw
- axle sleeve
- rolling element
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Abstract
The utility model proposes a kind of ball-screws comprising: screw rod, the periphery of screw rod are provided with a plurality of first groove, and every first groove is formed as the ring-type being closed in the circumferential direction of screw rod；Axle sleeve, axle sleeve are sheathed on screw rod, and the inner surface of axle sleeve, which is provided with, extends second groove along hand of helix, and first groove and second groove are intersected；And multiple rolling elements, multiple rolling elements are embedded in the crossover location of first groove and second groove, when screw rod and axle sleeve relatively rotate, rolling element can be in the crossover location rotation and/or rolling of first groove and second groove.The rolling element in ball-screw by adopting the above technical scheme can be in the crossover location rotation and/or rolling of first groove and second groove, the processing reflux road on axle sleeve is not needed, the friction between screw rod and axle sleeve can be reduced by rolling element, not only can making axle sleeve, the processing is simple, manufacturing cost decline, and solve the problems, such as to roll running body bite.
Description
Technical field
The utility model belongs to technical field of mechanical transmission, and in particular to a kind of ball-screw.
Background technique
Ball-screw is a kind of mechanical driving device for converting rotary motion to linear motion, has the small, effect that rubs
The features such as rate is high, the service life is long, small in size, bearing capacity is strong, be widely used in precision instrument, numerically-controlled machine tool, weaponry,
The fields such as industrial robot, medical instrument and aerospace.
A kind of ball-screw of the prior art includes screw rod, axle sleeve and ball, and axle sleeve is sheathed on screw rod, on screw rod and axle sleeve
Offer helicla flute.Ball is put between screw rod and axle sleeve, ball not only with rotation but also can make screw rod and axis with circulating rolling
Friction between set is rolling friction, thus considerably reduces frictional resistance, improves transmission efficiency.The structure is needed in axis
Reverser is installed in set processing reflux road on axle sleeve, is recycled between axle sleeve and screw rod so that ball is returned by reflux road.It is existing
Have the ball-screw of technology in the process of running ball through reflux road when direction of motion suddenly change, will cause ball-screw
Bite is run, irregularity generates vibration and noise.And return way structure is complicated, and requirement on machining accuracy is high, and difficulty of processing is big,
Processing cost is high, and reflux road also causes the radial dimension of axle sleeve larger, and ball-screw is made not to be suitable for narrow space.
Utility model content
Based on above-mentioned problem of the prior art, the utility model is directed to a kind of ball-screw, solves the prior art
The problem of ball screw arrangement is complicated, processing cost is high and operation bite.
The utility model proposes a kind of ball-screw, the ball-screw includes:
Screw rod, the periphery of the screw rod are provided with a plurality of first groove, and every first groove is formed as in the silk
The ring-type being closed in the circumferential direction of bar；
Axle sleeve, the axle sleeve are sheathed on the screw rod, and the inner surface of the axle sleeve, which is provided with, extends the along hand of helix
Two grooves, the first groove and the second groove are intersected；And
Multiple rolling elements, the multiple rolling element are embedded in the crossover location of the first groove and the second groove,
When the screw rod and the axle sleeve relatively rotate, the rolling element can be in the friendship of the first groove and the second groove
Vent sets rotation and/or rolling, the rolling element moving axially with respect to the axle sleeve in the axle sleeve with the screw rod
It is dynamic.
Preferably, the ball-screw further includes retainer, the ball-screw radially, retainer setting
Between the screw rod and the axle sleeve, the retainer is provided with the locating slot for accommodating the rolling element.
Preferably, every first groove is both formed in the axially vertical plane with the screw rod, a plurality of described
First groove is set in parallel to each other.
Preferably, have between any two adjacent first grooves in a plurality of first groove identical or different
Distance.
Preferably, the distance between adjacent two described first grooves are more than or less than the screw pitch of the second groove, institute
It states second groove and is provided with one or more.
Preferably, rolling element described at least four is embedded in the crossover location of the first groove and the second groove.
Preferably, the second groove is provided with a plurality of, a plurality of second groove lead having the same so that
Be parallel to each other between a plurality of second groove, a plurality of second groove in the circumferential direction of the axle sleeve uniformly or non-uniformly
It is spaced apart.
Preferably, the rolling element is embedded in all or part of first groove；And/or
The rolling element is embedded in all or part of second groove.
Preferably, the distance between adjacent two described first grooves be equal to the second groove screw pitch, described first
Groove is at least arranged two, and the second groove is at least arranged three.
Preferably, the axial length of the screw rod occupied by a plurality of first groove is less than shared by the second groove
According to the axle sleeve axial length.
Preferably, the multiple rolling element and the first groove are tangent, the multiple rolling element and the second groove
Tangent, the multiple rolling element is that shape is identical or variform revolving body.
Preferably, the multiple rolling element is sphere.
Preferably, it is not provided in the axle sleeve for the reflux road for rolling body circulation.
The rolling element in ball-screw by adopting the above technical scheme can be in the intersection position of first groove and second groove
Rotation and/or rolling are set, does not need the processing reflux road on axle sleeve, not only can making axle sleeve, the processing is simple, manufacturing cost
Decline, and can solve the problem of rolling element when reflux road by being prone to wear, keep ball-screw operation smooth.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of the ball-screw of first embodiment according to the present utility model.
Fig. 2 shows the cross-sectional views of the ball-screw of first embodiment according to the present utility model.
Fig. 3 shows the partial structural diagram of the ball-screw of first embodiment according to the present utility model splitted
(omitting retainer).
Fig. 4 shows the configuration schematic diagram of the ball-screw of first embodiment according to the present utility model.
Fig. 5 shows the cross-sectional view of the axle sleeve of the ball-screw of first embodiment according to the present utility model.
Fig. 6 shows the structural schematic diagram of the screw rod of the ball-screw of first embodiment according to the present utility model.
The structural schematic diagram that Fig. 7 shows the ball-screw of second embodiment according to the present utility model (shows rolling
Kinetoplast).
Fig. 8 shows the structural representation of the partly cut-away of the ball-screw of second embodiment according to the present utility model
Figure.
Fig. 9 shows the cross-sectional view of the ball-screw of second embodiment according to the present utility model.
Figure 10 shows the structural representation of the partly cut-away of the ball-screw of third embodiment according to the present utility model
Figure.
Figure 11 shows the structural schematic diagram of the axle sleeve of the ball-screw of third embodiment according to the present utility model.
Figure 12 shows the structural representation of the partly cut-away of the ball-screw of the 4th embodiment according to the present utility model
Figure.
Figure 13 shows the structural schematic diagram of the screw rod of the ball-screw of the 4th embodiment according to the present utility model.
Figure 14 shows the partial sectional view of the ball-screw of another embodiment according to the present utility model.
Figure 15 shows the structural schematic diagram of the rolling element of the ball-screw of another embodiment according to the present utility model.
Figure 16 shows the partial sectional view of the ball-screw of a further embodiment according to the present utility model.
Figure 17 shows the structural schematic diagrams of the rolling element of the ball-screw of a further embodiment according to the present utility model.
Figure 18 shows the structural schematic diagram of the retainer of the ball-screw of a further embodiment according to the present utility model.
Description of symbols
1 screw rod, 11 first groove
2 axle sleeve, 21 second groove
3 rolling elements
4 retainer, 41 locating slot
A axial direction R radial direction C is circumferential.
Specific embodiment
The illustrative embodiments of the utility model are described with reference to the accompanying drawings.It should be appreciated that these specific descriptions are only
How to implement the utility model, rather than all feasible sides of exhaustive the utility model for teaching those skilled in the art
Formula, without in limitation the scope of the utility model.
First embodiment
As shown in Figures 1 to 6, the utility model provides a kind of ball-screw comprising screw rod 1, axle sleeve 2,3 and of rolling element
Retainer 4.
Screw rod 1 is generally cylindric, and the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends, and first
Groove 11 is formed as close-shaped.The edge of first groove 11 can be with perpendicular to the section of the plane of the extending direction of first groove 11
For arc.Plane where first groove 11 can be vertical with the axial A of screw rod 1.A plurality of first groove 11 is parallel to each other
Ground setting, and can have identical distance between two adjacent first grooves 11.
Axle sleeve 2 is whole can be sheathed on screw rod 1 for cylindrical shape, axle sleeve 2, and the inner peripheral surface of axle sleeve 2 is provided with along helix side
To the second groove 21 of extension, second groove 21 can be set a plurality of.Such as second groove 21 can be 4,4 the second ditches
Slot 21 can have identical lead and uniformly be spaced apart on the circumferential C of axle sleeve 2.Between adjacent two first grooves 11
Distance be equal to second groove 21 screw pitch.It is to be appreciated that the distance between adjacent two first grooves 11 refer to adjacent two
The distance between same position of first groove 11, such as the distance between the center line of adjacent two first grooves 11.For
For multiple thread, screw pitch is two adjacent the distance between first grooves 11, and screw pitch is equal to lead divided by the head number of screw thread.
The edge of second groove 21 can be arc perpendicular to the section of the plane of the extending direction of second groove 21.First groove 11 and
Two grooves 21 are arranged in a crossed manner, and in this embodiment, every first groove 11 and 4 second groove 21, which is formed at 4, intersects position
It sets.
The axial length of screw rod 1 occupied by a plurality of first groove 11 is less than the axis of axle sleeve 2 occupied by second groove 21
To length.Particularly, during the partial region on the axial A of screw rod 1 is provided in first groove 11, such as the axial A of screw rod 1
Between be partially provided with first groove 11, whole positions in 2 axial direction of axle sleeve are provided with second groove 21.
Rolling element 3 is embedded in the crossover location of first groove 11 and second groove 21, and rolling element 3 can be set multiple.
Rolling element 3 can be sphere, and rolling element 3 and first groove 11 and second groove 21 are tangent.Rolling element 3 can be in first groove
11 and second groove 21 in rotation, especially when screw rod 1 and axle sleeve 2 relatively rotate, rolling element 3 can be in 11 He of first groove
The crossover location rotation and/or rolling of second groove 21, rolling element 3 are moved along second groove 21, but again without departing from it
The first groove 11 at place.It sees on the whole, when axle sleeve 2 rotates, the position of rolling element 3 is moved with screw rod 1 along axial A, is rolled
Body 3 need not cause the direction of motion to change by reflux road.Rolling element 3 reduces the friction between screw rod 1 and axle sleeve 2.
In the present embodiment, multiple rolling elements 3, such as 4,4 rolling elements 3 are provided in every first groove 11
It is uniformly spaced apart on the circumferential C of screw rod 1.It is appreciated that not contacted between multiple rolling elements 3, it is possible to reduce rolling element 3 it
Between rub the resistance and noise of generation, to keep ball-screw operation smooth, noise is small, can also have faster operation speed
Degree.
Retainer 4 is generally cylindric, and retainer 4 is sheathed on screw rod 1, and on radial R, retainer 4 is located at screw rod 1 and axis
Between set 2.Retainer 4 is provided with multiple locating slots 41 for accommodating rolling element 3, and locating slot 41 can be round hole.
It is appreciated that the first groove 11 of screw rod 1 is closed for the outer peripheral surface in screw rod 1 due in the present embodiment
Annular.When the rotation of axle sleeve 2 makes screw rod 1 axially A is mobile relative to axle sleeve 2, although rolling element 3 can be along the of axle sleeve 2
Two grooves 21 are mobile, but rolling element 3 is without departing from the first groove 11 where it, thus, rolling element 3 is on the whole with screw rod 1
It is moved along axial direction A.In the ball-screw of present embodiment, it is not necessary to process reflux road in axle sleeve 2 or be installed on axle sleeve 2 anti-
To device.This reduce the sizes of axle sleeve 2 and the structure for simplifying axle sleeve 2, and the radial dimension of ball-screw is become smaller,
Production cost can reduce.
In the present embodiment, the plane where an annular first groove 11 is vertical with axial direction A, however, this is practical
It is novel without being limited thereto, as long as first groove 11 forms closed annular in the outer peripheral surface of screw rod.
Second embodiment
The overall structure of the ball-screw of second embodiment according to the present utility model and the ball of first embodiment
Lead screw is identical.In the present embodiment, identical appended drawing reference is marked for component same as the first embodiment, and omitted
Detailed description thereof.
As shown in Figure 7 to 9, the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends, first groove
11 are formed as close-shaped.
The inner peripheral surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set
It is a plurality of.The distance between adjacent two first grooves 11 are whole equal to the screw pitch of the screw pitch of second groove 21 or second groove 21
Several times.
It is appreciated that every first groove 11 is formed at three with second groove 21 intersects position in order to make axle sleeve 2 keep stablizing
It sets, i.e., second groove 21 can be at least provided with three.Rolling element 3 is embedded in the intersection position of first groove 11 and second groove 21
It sets.For the purposes of making axle sleeve 2 keep stablizing, first groove 11 can be at least provided with two, it is preferable that two first grooves 11
It is spaced apart on the axial A of screw rod 1.6 rolling elements 3 are preferably at least set.
It is appreciated that when the rotation of axle sleeve 2 makes screw rod 1 axially A is mobile relative to axle sleeve 2, rolling element 3 can be
The crossover location rotation and/or rolling of first groove 11 and second groove 21, rolling element 3 can be along the second grooves 21 of axle sleeve 2
It is mobile, but rolling element 3 is without departing from the first groove 11 where it.It sees on the whole, when axle sleeve 2 rotates, the position of rolling element 3
It is moved with screw rod 1 along axial A.Rolling element 3 reduces the friction between screw rod 1 and axle sleeve 2.
Third embodiment
The overall structure of the ball-screw of second embodiment according to the present utility model and the ball of first embodiment
Lead screw is identical.In the present embodiment, identical appended drawing reference is marked for component same as the first embodiment, and omitted
Detailed description thereof.
As shown in Figure 10 and Figure 11, the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends, the first ditch
Slot 11 is formed as close-shaped.
The inner peripheral surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set
One.In this embodiment, every first groove 11 and second groove 21 form crossover location at 1.Rolling element 3 is embedded in
The crossover location of one groove 11 and second groove 21.It is appreciated that due to only having a second groove 21, every first ditch
1 rolling element 3 is at most set in slot 11.It is appreciated that rolling element 3 can be embedded in the first groove 11 of part, without
Rolling element 3 must be embedded in every first groove 11.
It is appreciated that being inlaid with rolling element 3 due to only having 1 second groove 21 in the embodiment, axle sleeve 2 can also
A plurality of second groove is arranged, and rolling element 3 is embedded in the part second groove in a plurality of second groove.
It is appreciated that when the rotation of axle sleeve 2 makes screw rod 1 axially A is mobile relative to axle sleeve 2, rolling element 3 can be
The crossover location rotation and/or rolling of first groove 11 and second groove 21, rolling element 3 can be along the second grooves 21 of axle sleeve 2
It is mobile, but rolling element 3 is without departing from the first groove 11 where it.It sees on the whole, when axle sleeve 2 rotates, the position of rolling element 3
It is moved with screw rod 1 along axial A.Rolling element 3 reduces the friction between screw rod 1 and axle sleeve 2.
The distance between adjacent two first grooves 11 can be more than or less than second groove 21 screw pitch, both adjacent two
The distance between first groove 11 is not equal to the screw pitch of second groove 21.As shown in Figure 10, in this embodiment, adjacent two
The distance between first groove 11 is less than the screw pitch of second groove 21.In order to make axle sleeve 2 keep stablizing, preferably at least it is arranged 4
Rolling element 3.
4th embodiment
The overall structure of the ball-screw of third embodiment according to the present utility model and the ball of second embodiment
Lead screw is identical.In the present embodiment, identical appended drawing reference is marked for component identical with second embodiment, and omitted
Detailed description thereof.
As shown in Figure 12 and Figure 13, the periphery of screw rod 1 is provided with a plurality of first groove 11 that circumferentially C extends, the first ditch
Slot 11 is formed as close-shaped, and a plurality of first groove 11 is set in parallel to each other, and between two adjacent first grooves 11
It can have different distances.That is, another adjacent first groove of certain first groove 11 and its axial side
11 distance and this certain first groove 11 can not at a distance from the another adjacent first groove 11 of its axial other side
Together.In this embodiment, such as screw rod 1 can be set 4 first grooves 11, adjacent two first grooves 11 of part it
Between distance can be greater than the screw pitch of second groove 21, the distance between adjacent two articles of first grooves 11 of part can be equal to the
The screw pitch of two grooves 21.
The inner peripheral surface of axle sleeve 2 is provided with the second groove 21 extended along hand of helix, and second groove 21 can be set
It is a plurality of, such as second groove 21 can be 4.4 second grooves 21 can have identical lead and in the circumferential direction of axle sleeve 2
C is upper uniform spaced apart.The distance between adjacent two first grooves 11 can be more than or less than the screw pitch of second groove 21,
In the embodiment, the distance between adjacent two first grooves 11 are equal to the screw pitch of second groove 21 or are equal to the second ditch
The integral multiple of the screw pitch of slot 21.Every first groove 11 and second groove 21 form crossover location at 4.Rolling element 3 is embedded in
The crossover location of one groove 11 and second groove 21.Rolling element 3 can only embedded part crossover location, such as rolling element 3 inlays
3 first grooves 11 in the crossover location of second groove 21 and 3 first groove 11, i.e. 4 first grooves 11 are inlayed
There is rolling element 3.In order to make axle sleeve 2 keep stablizing, 4 rolling elements 3 are preferably at least set.
It is appreciated that rolling element 3 can be in the crossover location of first groove 11 and second groove 21 when axle sleeve 2 rotates
Rotation and/or rolling, rolling element 3 can be moved along the second groove 21 of axle sleeve 2, but rolling element 3 is without departing from the where it
One groove 11.It sees on the whole, when axle sleeve 2 rotates, the position of rolling element 3 is moved with screw rod 1 along axial A.Rolling element 3 reduces silk
Friction between bar 1 and axle sleeve 2.
Although the specific technical solution of the utility model is set forth in the above specific embodiment,
Be it should be noted that:
(1) as shown in Figure 14 to Figure 17, rolling element 3 according to the present utility model can be not only sphere, can also be it
The revolving body of his shape, such as coniform or circle drum type.Rolling element of different shapes, which can mix, is packed into first groove and second
The crossover location of groove.
(2) the putting down along extending direction vertical to itself of first groove 11 and second groove 21 according to the present utility model
The section in face not only can be arc, be also possible to triangle or other shapes.
(3) as shown in figure 18, the locating slot 41 of retainer 4 according to the present utility model not only can be circle, can be with
It is strip hole, the strip hole especially extended along the axial A of retainer 4.
(4) although in the above-described embodiment, a plurality of second groove 21 lead having the same and in the circumferential direction of axle sleeve 2
C it is upper it is uniform be spaced apart, but the utility model is without being limited thereto, a plurality of second groove 21 can have identical lead and
It is non-uniform on the circumferential C of axle sleeve 2 to be spaced apart, make adjacent the distance between two second grooves 21 can be unequal.
Claims (13)
1. a kind of ball-screw, which is characterized in that the ball-screw includes:
Screw rod, the periphery of the screw rod are provided with a plurality of first groove, and every first groove is formed as in the screw rod
The ring-type being closed in circumferential direction；
Axle sleeve, the axle sleeve are sheathed on the screw rod, and the inner surface of the axle sleeve, which is provided with, extends the second ditch along hand of helix
Slot, the first groove and the second groove are intersected；And
Multiple rolling elements, the multiple rolling element are embedded in the crossover location of the first groove and the second groove, in institute
When stating screw rod and axle sleeve relative rotation, the rolling element can be in the intersection position of the first groove and the second groove
Rotation and/or rolling are set, the rolling element is as the screw rod is in the mobile axially with respect to the axle sleeve of the axle sleeve.
2. ball-screw according to claim 1, which is characterized in that the ball-screw further includes retainer, described
Radially, the retainer is set between the screw rod and the axle sleeve ball-screw, and the retainer, which is provided with, to be used for
Accommodate the locating slot of the rolling element.
3. ball-screw according to claim 1, which is characterized in that every first groove is both formed in and the silk
In the axially vertical plane of bar, a plurality of first groove is set in parallel to each other.
4. ball-screw according to claim 1, which is characterized in that in a plurality of first groove any two it is adjacent
There is identical or different distance between the first groove.
5. ball-screw according to claim 1, which is characterized in that the distance between adjacent two described first grooves are big
In or less than the second groove screw pitch, the second groove is provided with one or more.
6. ball-screw according to claim 5, which is characterized in that rolling element described at least four is embedded in described first
The crossover location of groove and the second groove.
7. ball-screw according to claim 1, which is characterized in that the second groove be provided with it is a plurality of, it is a plurality of described
So that being parallel to each other between a plurality of second groove, a plurality of second groove exists second groove lead having the same
It is uniformly or non-uniformly spaced apart in the circumferential direction of the axle sleeve.
8. ball-screw according to claim 1, which is characterized in that be embedded in institute in all or part of first groove
State rolling element；And/or
The rolling element is embedded in all or part of second groove.
9. ball-screw according to claim 1, which is characterized in that the distance between adjacent two described first grooves etc.
In the integral multiple of the screw pitch of the screw pitch or second groove of the second groove, the first groove is at least arranged two,
The second groove is at least arranged three.
10. ball-screw according to claim 1, which is characterized in that the silk occupied by a plurality of first groove
The axial length of bar is less than the axial length of the axle sleeve occupied by the second groove.
11. ball-screw according to claim 1, which is characterized in that the multiple rolling element and the first groove phase
It cuts, the multiple rolling element and the second groove are tangent, and the multiple rolling element is that shape is identical or variform revolution
Body.
12. ball-screw according to claim 1, which is characterized in that the multiple rolling element is sphere.
13. ball-screw according to claim 1, which is characterized in that be not provided with following for the rolling element in the axle sleeve
The reflux road of ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084457.3U CN209511045U (en) | 2019-01-17 | 2019-01-17 | Ball-screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920084457.3U CN209511045U (en) | 2019-01-17 | 2019-01-17 | Ball-screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209511045U true CN209511045U (en) | 2019-10-18 |
Family
ID=68201307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920084457.3U Active CN209511045U (en) | 2019-01-17 | 2019-01-17 | Ball-screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209511045U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667905A (en) * | 2019-01-17 | 2019-04-23 | 苏春光 | The ball-screw of ring grain screw rod matching thread axle sleeve |
-
2019
- 2019-01-17 CN CN201920084457.3U patent/CN209511045U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109667905A (en) * | 2019-01-17 | 2019-04-23 | 苏春光 | The ball-screw of ring grain screw rod matching thread axle sleeve |
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Effective date of registration: 20220701 Address after: No. 11, Yinhai Avenue South, Huicheng, Xinhui District, Jiangmen City, Guangdong Province, 529100 Patentee after: GUANGDONG KAITE PRECISION MACHINERY Co.,Ltd. Address before: No.19, Bei'an North Road, Huicheng, Xinhui District, Jiangmen City, Guangdong Province, 529000 Patentee before: Su Chunguang |