CN203906695U - Ball screw mechanism and machine tool comprising same - Google Patents
Ball screw mechanism and machine tool comprising same Download PDFInfo
- Publication number
- CN203906695U CN203906695U CN201420027523.0U CN201420027523U CN203906695U CN 203906695 U CN203906695 U CN 203906695U CN 201420027523 U CN201420027523 U CN 201420027523U CN 203906695 U CN203906695 U CN 203906695U
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- China
- Prior art keywords
- ball
- channel
- back part
- recirculation
- leading screw
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052802 copper Inorganic materials 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 230000004087 circulation Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000033001 locomotion Effects 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
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- Transmission Devices (AREA)
Abstract
The utility model discloses a ball screw mechanism. The ball screw mechanism comprises a screw, a plurality of balls, a nut and at least one ball circulating structure, wherein an external spiral groove is formed in the periphery of the screw; the balls roll along the external spiral groove; the nut is meshed with the screw through the balls; the ball circulating structure is structured to enable the balls to circularly return a second position of the external spiral groove from a first position of the external spiral groove; the screw comprises a cylindrical ball retainer for keeping the balls on the screw and a core piece fixed in the ball retainer. The utility model also discloses a machine tool comprising the ball screw mechanism. The ball screw mechanism is simple in structure, reliable, and suitable for certain special applications.
Description
Technical field
The utility model relates to a kind of ball screw framework and a kind of lathe that comprises ball screw framework.
Background technique
Ball screw framework be a kind of by ball means of rolling realize rotatablely move and straight line motion between the mechanical transmission mechanism of efficient conversion.Due to ball screw framework have that surface friction drag is little, transmission efficiency is high, positioning precision is high, can reversible transmission etc. advantage, therefore it is widely used in machinery industry that machine industry is relevant with other.
Ball screw framework is mainly made up of leading screw, nut, ball-recirculation structure, ball etc.Leading screw outer surface and nut internal surface are processed with respectively open spiral chute, nut sleeve is on leading screw, the spiral chute of leading screw and the spiral chute of nut form the helical duct of ball moving jointly, ball is housed in helical duct, ball is the tie that transmits relative movement between leading screw and nut, and leading screw and nut are realized screw thread transmission by ball.Ball is arranged in order along raceway in nut, forms a ball chain, and ball chain forms a closed endless chain by the ball-recirculation structure on nut between leading screw and nut, to realize continuous transmission.On nut, make ball realize back by ball-recirculation structure.
Be arranged on the ball screw framework on nut for ball-recirculation structure, because the size of nut is relatively little, ball-recirculation structure be set and have certain difficulty, and ball-recirculation structure is now also comparatively complicated.In addition, this mechanism is applicable to the length of leading screw conventionally much larger than the occasion of the length of nut, and nut can move on whole leading screw.But along with the continuous variation that mechanical conductive requires, need to use in some occasion the ball screw framework that nut length is suitable with leading screw length, existing ball screw framework can not meet the demands.
For this reason, can adapt to new demand and simple in structure, reliable novel ball screw framework in the urgent need to a kind of.
Model utility content
The purpose of this utility model is to provide a kind of simple in structure, reliable ball screw framework and a kind of corresponding lathe.
According to first aspect, a kind of ball screw framework is provided, comprising: leading screw, its periphery is provided with external spiral groove; Multiple balls, they roll along described external spiral groove; Nut, it engages with described leading screw via described ball; And at least one ball-recirculation structure, it is configured to be suitable for making ball to turn back to the second place of external spiral groove from the primary importance circulation of external spiral groove; Wherein, described leading screw comprises and is suitable for ball to remain on cylindric ball retainer on leading screw and be fixed on the chipware in described ball retainer.
Preferably, described ball retainer is provided with the first spiral chute penetrating, and the periphery of described chipware is provided with the second spiral chute, and at assembled state, described the first spiral chute overlaps and jointly forms described external spiral groove with the second spiral chute; And/or described ball retainer processes by the first tubular element, and be screwed to described chipware from one end of described chipware in the time of assembling; And/or described ball retainer is formed by multiple component combinations.
Preferably, the described second spiral fluted degree of depth equals the radius of described ball; And/or described the first tubular element is copper pipe; And/or described ball-recirculation structure comprises that described third channel is communicated with between described the first and second passages and with them along the first passage of the primary importance of radially leading to external spiral groove of described chipware, along the second channel of the second place of radially leading to external spiral groove of described chipware and along the axially extended third channel of chipware.
Preferably, the central axis of described first passage, described second channel and described third channel is arranged in the same center longitudinal profile of leading screw, and/or in described first passage, be provided with the first sleeve pipe, in described second channel, be provided with the second sleeve pipe, joint between described first passage and described third channel is provided with the first back part, joint between described second channel and described third channel is provided with the second back part, described the first back part is configured to be suitable for making ball to enter swimmingly described third channel and be suitable for making ball to enter swimmingly described the first sleeve pipe from described third channel from the first sleeve pipe, described the second back part is configured to be suitable for making ball to enter swimmingly described the second sleeve pipe and be suitable for making ball to enter swimmingly described third channel from described the second sleeve pipe from third channel.
Preferably, described back part is dihedral; And/or at assembled state, the two ends of described the first sleeve pipe abut against respectively the inner side of the first back part and ball retainer, the two ends of described the second sleeve pipe abut against respectively the inner side of the second back part and ball retainer; And/or described ball screw framework comprises multiple ball-recirculation structures, described multiple ball-recirculation structures being axially arranged in order along described leading screw.
Preferably, described multiple ball-recirculation structure is arranged in the same center longitudinal profile of leading screw; And/or in the time that the first back part and the second back part are not installed, the third channel of a ball-recirculation structure communicates with the third channel of an adjacent ball-recirculation structure; And/or third channel one end through to leading screw in the time that the first back part or the second back part are not installed of the ball-recirculation structure of close leading screw end; And/or the second back part of the first back part of a ball-recirculation structure or the second back part and an adjacent ball-recirculation structure or the first back part contact with each other and install; And/or the third channel of each ball-recirculation structure is all on the central axis in leading screw.
Preferably, described chipware comprises cylinder shell and be fixed on the ball-recirculation parts in cylinder shell, and the periphery of described cylinder shell is provided with described the second spiral chute, and described ball-recirculation structure is arranged in described ball-recirculation parts at least partly.
Preferably, described cylinder shell is processed by the second tubular element; And/or described cylinder shell and ball-recirculation parts are made up of different materials.
Preferably, described the second tubular element is copper pipe.
According to second aspect, a kind of lathe is provided, described lathe comprises described ball screw framework.
According to the utility model, can reduce the simplification of structural complexity, size, cost and the assembling of ball screw framework, and can be advantageously applied to the occasion of short stroke, for example, in some precision machine tool.
Brief description of the drawings
By describing in more detail the utility model referring to accompanying drawing, can understand better principle of the present utility model, feature and advantage below.Accompanying drawing comprises:
Fig. 1 shows according to the longitudinal sectional view of the ball screw framework of an exemplary embodiment of the present utility model.
Fig. 2 shows the front view of the ball screw framework of Fig. 1.
Embodiment
, will specific embodiment of the utility model be described in more detail referring to accompanying drawing below, to understand better basic thought of the present utility model.
Fig. 1 shows according to the longitudinal sectional view of the ball screw framework 1 of an exemplary embodiment of the present utility model.Fig. 2 shows the front view of this ball screw framework 1.
As illustrated in fig. 1 and 2, ball screw framework 1 comprise be provided with external spiral groove 2 leading screw 3, can not from leading screw 3 come off multiple balls 4 of rolling along external spiral groove 2, be sleeved on leading screw 3 and keep the nut 5 that engages and for making the ball-recirculation structure 6 of ball 4 shuttling movements via ball 4 and leading screw 3.Obviously, the inner circumferential surface of nut 5 be provided with leading screw 3 on the inner spiral groove that matches of external spiral groove 2.
In the time that leading screw 3 rotates, nut 5 can move linearly; Or in the time that nut 5 rotates, leading screw 3 can move linearly.
As shown in Figure 2, external spiral groove 2 is the open grooves that are positioned on the outer surface of leading screw 3.The shape of external spiral groove 2 is suitable for making ball 4 to roll swimmingly therein and can not blocks.
As shown in Figure 1, leading screw 3 comprises cylindric ball retainer 7 and is arranged on the chipware 8 in ball retainer 7.Ball retainer 7 is provided with the spiral chute 9 penetrating, and the periphery of chipware 8 is provided with corresponding spiral chute 10.At assembling condition, spiral chute 9 and 10 overlaps each other, jointly forms the external spiral groove 2 on leading screw 3.
Preferably, the degree of depth of the spiral chute 10 in the periphery of chipware 8 equals the radius of ball 4, and the half adaptation of its shape of cross section and ball 4.
Preferably, the shape of cross section of the spiral chute 9 on ball retainer 7 and another part adaptation of ball 4, and make at assembling condition, only the sub-fraction of ball 4 (, be less than the part of the half of ball 4) can be from the exposed protrusion of ball retainer 7, thus ball 4 can be remained in external spiral groove 2 and can not come off.
Like this, at assembling condition, the common external spiral groove 2 forming of spiral chute 9 and 10 is suitable for the major part adaptation with ball 4.
Ball retainer 7 can be formed by a cylindrical structural member, now, is preferably formed by copper pipe processing.In this case, ball retainer 7 can be screwed to chipware 8 from one end of chipware 8, in the time reaching suitable position, can ball retainer 7 and chipware 8 is fixed together and form leading screw 3 by fastening piece (not shown), for example screw.
As shown in Figure 1, ball screw framework 1 has three ball-recirculation structures 6.Below, be described in detail as an example of the ball-recirculation structure 6 of the leftmost side example.Ball-recirculation structure 6 comprises: along the first passage that radially leads to spiral chute 10 11 of chipware 8, and first passage 11 is axially spaced and also along the second channel that radially leads to spiral chute 10 12 of chipware 8 and the third channel 13 between first passage 11 and second channel 12.Third channel 13 preferably axially extends along the center of chipware 8.In the time that ball 4 is rolled to first passage 11 along external spiral groove 2, ball 4 enters first passage 11 and can push successively the ball 4 in third channel 13 and second channel 12, enters in external spiral groove 2 thereby can force another ball 4 to leave second channel 12.
Owing to having turning between first passage 11 and third channel 13, on the contrary therefore for make ball 4 can from first passage 11 enter into swimmingly third channel 13 or, the joint between first passage 11 and third channel 13 is provided with the first back part 14.The first back part 14 is preferably dihedral and has back domatic 15, and ball 4 moves and can enter into swimmingly third channel 13 or enter into first passage 11 along this back domatic 15.
As shown in Figure 1, in the same central longitudinal plane of described three ball-recirculation structures 6 in leading screw 3, and being axially arranged in order along leading screw 3.
Preferably, the diameter of third channel 13 is suitable for making ball 4 to be arranged in order movement.For the first back part 14 is in place, in first passage 11, be provided with the first sleeve pipe 16, the internal diameter of this first sleeve pipe 16 is suitable for making ball 4 to be arranged in order movement.When installation, first the first back part 14 is put into the joint between first passage 11 and third channel 13 by first passage 11, and then the first sleeve pipe 16 is packed into and in first passage 11, abuts against the first back part 14.At assembling condition, the inner side of ball retainer 7 abuts against the respective end of the first sleeve pipe 16, as shown in Figure 1.
Similarly, be provided with the second sleeve pipe 17 in second channel 12, the joint between second channel 12 and third channel 13 is provided with the second back part 18.By the second back part 18, on the contrary can make ball 4 from third channel 13 enter swimmingly second channel 12 or.Like this, just can make ball 4 produce shuttling movement.
As shown in Figure 1, the third channel of three ball-recirculation structures 6 communicates with each other in the time that the first back part 14 or the second back part 18 are not installed, and is preferably all positioned on the central axis of leading screw 3.And the third channel one of the ball-recirculation structure 6 at two ends is through to the end of leading screw.In addition,, at assembled state, the adjacent back part of two adjacent ball-recirculation structures 6 contacts with each other.
Obviously, also can directly process in the inside of chipware 8 passage that does not need back part and sleeve pipe just can make ball 4 circulate to return as ball-recirculation structure, now, be equivalent to back part and sleeve pipe and be integrated in this passage.
And the path that ball 4 returns is also not limited to the path shown in Fig. 1, as long as obviously can make ball 4 circulations get up, for example, third channel 13 also can axially not extend along the center of chipware 8.
As required, the axial length of each ball-recirculation structure 6 also can change, and the quantity of ball-recirculation structure 6 also can change, for example, can only adopt a ball-recirculation structure 6.This makes can be applied to according to ball screw framework 1 of the present utility model the occasion that stroke is short especially and installing space is very limited.
In addition, for the ease of installing and processing, obviously also can make cylindric ball retainer 7 be formed by multiple component combinations, for example cylindric ball retainer 7 can comprise the parts that two independent cross sections are semicircle, and these two parts are at the cylindric ball retainer 7 of the common composition of assembled state.Now, each parts can be respectively fixed on chipware 8.
For chipware 8, also can make it be formed by multiple parts.For example, chipware 8 can comprise cylinder shell and be fixed on the ball-recirculation parts in cylinder shell.Cylinder shell is preferably formed by copper pipe processing, and processes spiral chute 10 in its periphery.Ball-recirculation parts are preferably made up of plastics cheaply, and the processing passage that ball can circulate of sening as an envoy to wherein.
Basic thought of the present utility model is, by ball-recirculation structure 6 being arranged on leading screw 3 and leading screw 3 being made up of ball retainer 7 and chipware 8, can reduce the simplification of structural complexity, size, cost and the assembling of ball screw framework 1, and can be advantageously applied to the occasion of short stroke, for example, in some precision machine tool.
For a person skilled in the art, other advantages of the present utility model and substituting mode of execution are apparent.Therefore, the utility model with regard to its more wide in range meaning, be not limited to shown in and described detail, representative configurations and exemplary embodiment.On the contrary, those skilled in the art can carry out various amendments and substitute in the situation that not departing from essence spirit of the present utility model and scope.
Claims (10)
1. a ball screw framework, is characterized in that, comprising:
Leading screw, its periphery is provided with external spiral groove;
Multiple balls, they roll along described external spiral groove;
Nut, it engages with described leading screw via described ball; And
At least one ball-recirculation structure, it is configured to be suitable for making ball to turn back to the second place of external spiral groove from the primary importance circulation of external spiral groove;
Wherein, described leading screw comprises and is suitable for ball to remain on cylindric ball retainer on leading screw and be fixed on the chipware in described ball retainer.
2. ball screw framework as claimed in claim 1, is characterized in that,
Described ball retainer is provided with the first spiral chute penetrating, and the periphery of described chipware is provided with the second spiral chute, and at assembled state, described the first spiral chute overlaps and jointly forms described external spiral groove with the second spiral chute; And/or
Described ball retainer is processed by the first tubular element, and is screwed to described chipware from one end of described chipware in the time of assembling; And/or
Described ball retainer is formed by multiple component combinations.
3. ball screw framework as claimed in claim 2, is characterized in that,
The described second spiral fluted degree of depth equals the radius of described ball; And/or
Described the first tubular element is copper pipe; And/or
Described ball-recirculation structure comprises that described third channel is communicated with between described the first and second passages and with them along the first passage of the primary importance of radially leading to external spiral groove of described chipware, along the second channel of the second place of radially leading to external spiral groove of described chipware and along the axially extended third channel of chipware.
4. ball screw framework as claimed in claim 3, is characterized in that,
The central axis of described first passage, described second channel and described third channel is arranged in the same center longitudinal profile of leading screw; And/or
In described first passage, be provided with the first sleeve pipe, in described second channel, be provided with the second sleeve pipe, joint between described first passage and described third channel is provided with the first back part, joint between described second channel and described third channel is provided with the second back part, described the first back part is configured to be suitable for making ball to enter swimmingly described third channel and be suitable for making ball to enter swimmingly described the first sleeve pipe from described third channel from the first sleeve pipe, described the second back part is configured to be suitable for making ball to enter swimmingly described the second sleeve pipe and be suitable for making ball to enter swimmingly described third channel from described the second sleeve pipe from third channel.
5. ball screw framework as claimed in claim 4, is characterized in that,
Described back part is dihedral; And/or
At assembled state, the two ends of described the first sleeve pipe abut against respectively the inner side of the first back part and ball retainer, and the two ends of described the second sleeve pipe abut against respectively the inner side of the second back part and ball retainer; And/or
Described ball screw framework comprises multiple ball-recirculation structures, described multiple ball-recirculation structures being axially arranged in order along described leading screw.
6. ball screw framework as claimed in claim 5, is characterized in that,
Described multiple ball-recirculation structure is arranged in the same center longitudinal profile of leading screw; And/or
In the time that the first back part and the second back part are not installed, the third channel of a ball-recirculation structure communicates with the third channel of an adjacent ball-recirculation structure; And/or
Third channel one end through to leading screw in the time that the first back part or the second back part are not installed of the ball-recirculation structure of close leading screw end; And/or
The second back part of the first back part of a ball-recirculation structure or the second back part and an adjacent ball-recirculation structure or the first back part contact with each other and install; And/or
The third channel of each ball-recirculation structure is all on the central axis in leading screw.
7. as the ball screw framework as described in arbitrary in claim 2-6, it is characterized in that,
Described chipware comprises cylinder shell and be fixed on the ball-recirculation parts in cylinder shell, and the periphery of described cylinder shell is provided with described the second spiral chute, and described ball-recirculation structure is arranged in described ball-recirculation parts at least partly.
8. ball screw framework as claimed in claim 7, is characterized in that,
Described cylinder shell is processed by the second tubular element; And/or
Described cylinder shell and ball-recirculation parts are made up of different materials.
9. ball screw framework as claimed in claim 8, is characterized in that,
Described the second tubular element is copper pipe.
10. a lathe, is characterized in that, described lathe comprises arbitrary described ball screw framework in claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027523.0U CN203906695U (en) | 2014-01-17 | 2014-01-17 | Ball screw mechanism and machine tool comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420027523.0U CN203906695U (en) | 2014-01-17 | 2014-01-17 | Ball screw mechanism and machine tool comprising same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906695U true CN203906695U (en) | 2014-10-29 |
Family
ID=51780976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420027523.0U Expired - Lifetime CN203906695U (en) | 2014-01-17 | 2014-01-17 | Ball screw mechanism and machine tool comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906695U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803692A (en) * | 2024-02-29 | 2024-04-02 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
-
2014
- 2014-01-17 CN CN201420027523.0U patent/CN203906695U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117803692A (en) * | 2024-02-29 | 2024-04-02 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
| CN117803692B (en) * | 2024-02-29 | 2024-05-03 | 恒科鑫(深圳)智能科技有限公司 | Internal circulation screw-nut assembly and transmission system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |
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| CX01 | Expiry of patent term |