CN103048279B - Sine mechanism used for spectrophotometer - Google Patents
Sine mechanism used for spectrophotometer Download PDFInfo
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- CN103048279B CN103048279B CN201110308623.1A CN201110308623A CN103048279B CN 103048279 B CN103048279 B CN 103048279B CN 201110308623 A CN201110308623 A CN 201110308623A CN 103048279 B CN103048279 B CN 103048279B
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- guide rod
- slide block
- hole
- sine mechanism
- connection member
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Abstract
The invention provides a sine mechanism used for a spectrophotometer. The sine mechanism comprises a motor (10), a support (2), a screw rod (3) which is disposed on the support (2) and is driven by the motor (10), a guide rod (6) which is disposed on the support (2) and is parallel with the screw rod (3), and a slide block (4) which has a first through hole and a sleeve joint member (11), wherein internal screw threads are arranged on the inner peripheral surface of the first through hole, the slide block (4) is assembled on the screw rod (3) in a manner of engaging with the external screw threads on the internal screw threads and the screw rod (3), and the sleeve joint member (11) is sleeved on the guide rod (6) closed all around and can make the slide block (4) move axially along the guide rod (6). With precision matching between the sleeve joint member (11) and the guide rod (6), left and right shakiness or up and down shakiness of the slide block (4) caused by small gaps between the screw rod (3) and the slide block (4) is restricted, so that wavelength multiplicity of the spectrophotometer can be increased.
Description
Technical field
The present invention relates to a kind of for spectrophotometric sine mechanism, particularly relate to a kind of sine mechanism of the mechanical hook-up rocked with anti-limited slip block.
Background technology
Atomic absorption spectrophotometer (AAS), as instrument environment, metal semiconductor, petrochemistry macromolecular material being carried out to analytical control, is widely used in the fields such as medical science, biology and pharmacy.
In existing spectrophotometer product, sine mechanism is usually used the rectilinear motion of slide block to be converted to the rotation of grating via the fork be connected with the turntable of mounting grating.Fig. 1 and Fig. 2 is respectively the existing main pseudosection for spectrophotometric sine mechanism and left pseudosection.The existing concrete structure for spectrophotometric sine mechanism is as shown in Figure 1 and Figure 2, comprising: motor 10; Support 2; Screw mandrel 3, the two ends of this screw mandrel 3 are rotatably mounted within support 2 by bearing 1 and 7, and can be driven by motor 10 and rotate; Two ends are fixed and are assemblied on support 2 and the guide rod 6 be arranged in parallel with screw mandrel 3; And slide block 4.The first through hole of the left and right directions along Fig. 1 is provided with in the roughly middle position of the above-below direction of Fig. 1 of this slide block 4, the inner peripheral surface of this first through hole is provided with internal thread, and slide block 4 is assemblied on screw mandrel 3 by the externally threaded engagement on this internal thread and screw mandrel 3.The bottom of slide block 4 has through slide block 4 on the left and right directions of Fig. 1 and is communicated with the slit 13 of the lower circumference face of the first through hole and the downside end face of slide block 4, be provided with the threaded hole of through slide block 4 along the direction perpendicular to paper of Fig. 1 in the bottom of slide block 4, screw 5 is combined with in this threaded hole, the seam that can be changed described slit 13 by the tightness of set screw 5 is wide, and then can regulate the gap between the external thread of the internal thread of the first through hole and screw mandrel 3 thus guarantee the threaded engagement of degree of precision.The upside end face of slide block 4 is provided with the groove 12 of through slide block about 4 (left and right directions in Fig. 1), and guide rod 6 is arranged in this groove 12, and when motor 10 drives screw mandrel 3 to rotate, guide shoe 4 moves left and right along guide rod 6.In the substantial middle position of the left and right directions (left and right directions in Fig. 1) of described groove 12, the direction perpendicular to paper along Fig. 1 is provided with a circular hole, its one end and groove 12 conducting, the other end is closed, a spring 8 is equipped with in this circular hole, one end of spring 8 is connected to the blind end of circular hole, its other end via steel ball 9 by being pressed on guide rod 6.The gap in the direction perpendicular to paper along Fig. 1 between the groove 12 of slide block 4 and guide rod 6 can be eliminated by such structure, reach the object perpendicular to the motion direction of paper on of restriction slide block 4 at Fig. 1.
In addition, one end of not shown fork is connected on the sidewall of any side, left and right of slide block 4 by extension spring all the time, the other end of fork is connected to and is placed with (not shown) on the turntable of grating, when moving left and right under the driving of slide block 4 at motor, fork swings thereupon and then drives turntable to rotate, thus the rectilinear motion of slide block 4 is converted to the rotation of grating.
Summary of the invention
The problem that invention will solve
For in spectrophotometric sine mechanism, slide block and screw mandrel are threaded engagement, require higher repeatable accuracy (namely rotate forward after an angle rotates backward equal angular again at motor, require that slide block is returned to original position).But, in order to slide block can be moved left and right along with the rotation of screw mandrel, axially need certain gap at screw-driven between screw thread, and such gap can make slide block along the bumpy motion of guide rod.Although the rotation of slide block wire winding rod axis can be limited in above-mentioned existing sine mechanism by the compressing of steel ball and spring, but slide block still may due to the existence in the gap between the internal thread of slide block and the external thread of screw mandrel left and right or dandle, thus cause error, cause the decline of repeatable accuracy.
The present invention researches and develops to solve the above problems, its object is to provide a kind of rock with anti-limited slip block mechanical hook-up, the left and right that slide block can be eliminated or teetertotter for spectrophotometric sine mechanism.
Solve the means of problem
To achieve these goals, involved in the present invention for spectrophotometric sine mechanism, comprising: motor; Support; Arrange on the bracket, the screw mandrel driven by described motor; Arrange on the bracket, and the guide rod parallel with described screw mandrel; Slide block, described slide block has the first through hole and cover connection member, the inner peripheral surface of the first through hole is provided with internal thread, described slide block is assemblied on described screw mandrel with the state that described internal thread is meshed with the external thread on described screw mandrel, and described cover connection member surrounding to be socketed on described guide rod and to make described slide block only can along the axially-movable of described guide rod with closing.
According to of the present invention for spectrophotometric sine mechanism, wherein, be provided with in described cover connection member and distribute and at least three row balls arranged along the direction parallel with described guide rod outer peripheral face to vertical circumferencial direction etc. along with described guide rod shaft, described at least three row balls are pressed on described guide rod.
According to of the present invention for spectrophotometric sine mechanism, wherein, be provided with in described cover connection member and distribute and the four row balls arranged along the direction parallel with described guide rod outer peripheral face to vertical circumferencial direction etc. along with described guide rod shaft, described four row balls are pressed on described guide rod.
According to of the present invention for spectrophotometric sine mechanism, wherein, described cover connection member is a linear bearing.
According to of the present invention for spectrophotometric sine mechanism, wherein, described cover connection member is the second through hole, makes described second through hole and coordinating between described guide rod the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.1nm.
According to of the present invention for spectrophotometric sine mechanism, wherein, described cover connection member is the second through hole, makes described second through hole and coordinating between described guide rod the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.05nm.
According to of the present invention for spectrophotometric sine mechanism, wherein, in described second through hole, be also provided with an axle sleeve, make the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.1nm coordinating between described axle sleeve with described guide rod.
According to of the present invention for spectrophotometric sine mechanism, wherein, in described second through hole, be also provided with an axle sleeve, make the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.05nm coordinating between described axle sleeve with described guide rod.
The effect of invention
According to the present invention, due to the mechanical hook-up that sine mechanism rocks with anti-limited slip block, can the left and right of slide block be eliminated or teetertotter, thus the wavelength multiplicity of spectrophotometer when length scanning can be improved.In addition, in the technical scheme using linear bearing, because ball rolls with minimum frictional resistance, maneuvering load is little, and slide block can easy motion accurately.
Accompanying drawing explanation
Fig. 1 is the existing main pseudosection for spectrophotometric sine mechanism.
Fig. 2 is the existing left pseudosection for spectrophotometric sine mechanism.
Fig. 3 is the main pseudosection of the embodiment for spectrophotometric sine mechanism that the present invention relates to.
Fig. 4 is the left pseudosection of the embodiment for spectrophotometric sine mechanism that the present invention relates to.
Symbol description
1,7 ... bearing, 2 ... support, 3 ... screw mandrel, 4 ... slide block, 5 ... screw, 6 ... guide rod, 8 ... spring, 9 ... steel ball, 10 ... motor, 11 ... cover connection member, 12 ... groove, 13 ... slit
Embodiment
Below, by Fig. 3 and Fig. 4, the example for spectrophotometric sine mechanism involved in the present invention is described.The label identical with Fig. 1 with Fig. 2 is used to represent same or analogous parts in figs. 3 and 4.
Fig. 3 and Fig. 4 illustrates an example of the present invention.This example is compared with above-mentioned prior art, and the key distinction for instead of groove 12 with cover connection member 11 on slide block 4, and other structures are roughly the same with prior art, omit detailed description at this.As shown in Figure 3 and Figure 4, cover connection member 11 surrounding is socketed on guide rod 6 closedly, thus can limit the motion of slide block 4 in all directions perpendicular with the axis of guide rod 6, makes slide block 4 only can along the axially-movable of guide rod 6.
In addition, as shown in Figure 3 and Figure 4, be provided with in cover connection member 11 and distribute and at least three row balls arranged along the direction parallel with guide rod outer peripheral face along the circumferencial direction etc. vertical with the axis of guide rod 6, described at least three row balls are pressed on guide rod 6.When motor 10 drives screw mandrel 3 rotation to make slide block 4 move left and right, ball rolls with minimum frictional resistance on the outer peripheral face of guide rod 6, leads to slide block 4.So, at least three row balls distribute at the circumferentially decile perpendicular to guide rod 6 axis, linear contact lay is carried out respectively with guide rod 6, and compressing guide rod 6 perpendicular on the direction of more than three of guide rod 6 axis, thus the motion of slide block 4 in all directions perpendicular with the axis of guide rod 6 can be limited, make slide block 4 only can along the axially-movable of guide rod 6.At this, so-called decile distribution refers to decile distribution haply, do not require that adjacent two row balls are strictly equal relative to the angle of guide rod 6 axis, as long as each row ball is distributed in guide rod 6 circumferentially relatively uniformly, the object of the motion of restriction slide block 4 in all directions perpendicular with the axis of guide rod 6 can be reached.In addition, each row ball is in distribution in upright arrangement in the present embodiment, but the present invention is not limited thereto, and each row ball also can be uniformly distributed in other form, and such as, each row ball can in the zigzag shape distribution be parallel to each other in cover connection member 11.
In addition, as shown in Figure 3 and Figure 4, in this embodiment, be provided with in cover connection member 11 and distribute and the four row balls arranged along the direction parallel with described guide rod outer peripheral face along the circumferencial direction etc. vertical with the axis of guide rod 6, described four row balls are pressed on guide rod 6.
In addition, as shown in Figure 3 and Figure 4, the cover connection member 11 in this embodiment can be considered to be the bearing class A of geometric unitA with bearing outside.In other embodiments of the present invention, cover connection member 11 also can be the linear bearing with bearing outside and bearing inner sleeve structure.
In addition, in another embodiment of the present invention, cover connection member 11 is the second through hole, precision-fit between described second through hole and guide rod 6, thus the motion of slide block 4 in all directions perpendicular with the axis of guide rod 6 can be limited, make slide block 4 only can along the axially-movable of guide rod 6.
In addition, in another embodiment of the invention, an axle sleeve is also provided with in described second through hole, precision-fit between described axle sleeve and guide rod 6, thus the motion of slide block 4 in all directions perpendicular with the axis of guide rod 6 can be limited, make slide block 4 only can along the axially-movable of guide rod 6.
According to the present invention, due to the cover connection member that sine mechanism rocks with anti-limited slip block as above, the left and right of slide block or upper and lower rocking can be eliminated, thus effectively can improve the wavelength multiplicity of spectrophotometer when length scanning.According to the present invention, spectrophotometric wavelength multiplicity can be made to be ± below 0.1nm, and further preferable case is ± below 0.05nm.
Claims (8)
1. for a spectrophotometric sine mechanism, it is characterized in that, comprising:
Motor;
Support;
Arrange on the bracket, the screw mandrel driven by described motor;
Arrange on the bracket, and the guide rod parallel with described screw mandrel;
Slide block, described slide block has the first through hole and cover connection member, the inner peripheral surface of described first through hole is provided with internal thread, described slide block is assemblied on described screw mandrel with the state that described internal thread is meshed with the external thread on described screw mandrel, and described cover connection member surrounding to be socketed on described guide rod and to make described slide block only can along the axially-movable of described guide rod with closing.
2. sine mechanism as claimed in claim 1, it is characterized in that, be provided with in described cover connection member and distribute and at least three row balls arranged along the direction parallel with described guide rod outer peripheral face to vertical circumferencial direction etc. along with described guide rod shaft, described at least three row balls are pressed on described guide rod.
3. sine mechanism as claimed in claim 1, it is characterized in that, be provided with in described cover connection member and distribute and the four row balls arranged along the direction parallel with described guide rod outer peripheral face to vertical circumferencial direction etc. along with described guide rod shaft, described four row balls are pressed on described guide rod.
4. as the sine mechanism in claims 1 to 3 as described in any one, it is characterized in that, described cover connection member is a linear bearing.
5. sine mechanism as claimed in claim 1, it is characterized in that, described cover connection member is the second through hole, makes described second through hole and coordinating between described guide rod the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.1nm.
6. sine mechanism as claimed in claim 1, it is characterized in that, described cover connection member is the second through hole, makes described second through hole and coordinating between described guide rod the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.05nm.
7. sine mechanism as claimed in claim 5, is characterized in that, in described second through hole, be also provided with an axle sleeve, makes the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.1nm coordinating between described axle sleeve with described guide rod.
8. sine mechanism as claimed in claim 6, is characterized in that, in described second through hole, be also provided with an axle sleeve, makes the wavelength multiplicity of described spectrophotometer when length scanning be ± below 0.05nm coordinating between described axle sleeve with described guide rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110308623.1A CN103048279B (en) | 2011-10-12 | 2011-10-12 | Sine mechanism used for spectrophotometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110308623.1A CN103048279B (en) | 2011-10-12 | 2011-10-12 | Sine mechanism used for spectrophotometer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103048279A CN103048279A (en) | 2013-04-17 |
| CN103048279B true CN103048279B (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110308623.1A Expired - Fee Related CN103048279B (en) | 2011-10-12 | 2011-10-12 | Sine mechanism used for spectrophotometer |
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| CN (1) | CN103048279B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114380009B (en) * | 2022-01-20 | 2024-01-26 | 常州唯可泰电机科技有限公司 | Linear motion mechanism and disinfection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000310563A (en) * | 1999-04-27 | 2000-11-07 | Shimadzu Corp | Monochromator |
| CN201600191U (en) * | 2009-12-04 | 2010-10-06 | 天津市拓普仪器有限公司 | Double-drive sine generator |
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2011
- 2011-10-12 CN CN201110308623.1A patent/CN103048279B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN103048279A (en) | 2013-04-17 |
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