CN214122538U

CN214122538U - Toroidal grating adjusting mechanism

Info

Publication number: CN214122538U
Application number: CN202120195044.XU
Authority: CN
Inventors: 赵子淳; 王艳会; 鹿建; 管家月
Original assignee: Fermi Instruments Shanghai Co ltd
Current assignee: Fermi Instruments Shanghai Co ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-09-03
Anticipated expiration: 2031-01-25

Abstract

The utility model provides a toroidal grating adjusting mechanism, which comprises a first linear drive, a CF flange, a support rod, a support main body, a grating support, a first constant force spring, a second linear drive, an adjusting rod, a rotating assembly and a rotating shaft; the support main body is installed on the CF flange, the support rod is fixedly connected with the grating support and the support main body, the grating is installed on the grating support, the first linear drive and the second linear drive are installed on the CF flange and control the grating, the rotating shaft is located on the adjusting rod, the adjusting rod is connected with the CF flange, and the rotating assembly is located on the rotating shaft and connected with the grating support. Wherein the utility model has the advantages that: the return path difference caused by a mechanical structure is reduced, and therefore the repeated precision of the grating adjustment is improved.

Description

Toroidal grating adjusting mechanism

Technical Field

The utility model relates to a spectrum, chromatographic analysis instrument field, in particular to toroid grating adjustment mechanism.

Background

Both the spectrum and the chromatographic analysis instrument need a high-precision and high-stability light splitting system, and a grating is a core element of the light splitting system. The wavelength required by the detection can be screened through the rotation of the grating within a certain angle range, so that the adjusting mechanism of the positioning precision and the repetition precision of the grating is related to the quality of the whole light splitting system.

At present, a grating adjusting mechanism is mainly divided into synchronous belt transmission and gear transmission, the synchronous belt transmission is influenced by synchronous belt materials and environmental factors, and after the grating adjusting mechanism is used for a period of time, the synchronous belt per se generates creep deformation so as to increase return stroke difference and cause reduction of grating adjusting precision; the adjusting precision of the gear transmission is influenced by the machining precision and the assembling precision of the gear.

Disclosure of Invention

In order to solve the technical problem, the utility model discloses a toroidal grating adjustment mechanism, the technical scheme of the utility model is implemented like this:

a toroidal grating adjusting mechanism comprises a first linear drive, a CF flange, a support rod, a support main body, a grating support, a first constant force spring, a second linear drive, an adjusting rod, a rotating assembly and a rotating shaft; the support main body is installed on the CF flange, the support rod is fixedly connected with the grating support and the support main body, the grating is installed on the grating support, the first linear drive and the second linear drive are installed on the CF flange and control the grating, the rotating shaft is located on the adjusting rod, the adjusting rod is connected with the CF flange, and the rotating assembly is located on the rotating shaft and connected with the grating support.

Preferably, the grating is embedded in the grating support through a jacking screw.

Preferably, the rotating assembly is connected with the grating support in a hinged manner.

Preferably, the device further comprises a second constant force spring, a third constant force spring, a fourth constant force spring and an auxiliary rod; the second constant force spring and the third constant force spring are connected with the auxiliary rod, the fourth constant force spring is positioned on the rotating shaft,

preferably, a protection plate is further included; the protection plate is arranged on the grating bracket.

Preferably, the first linear drive and the second linear drive comprise stepper motors.

Preferably, an external computer is further included, and the external computer controls the first linear driver and the second linear driver.

By implementing the technical scheme of the utility model, the technical problems that the grating adjusting precision is easy to decline and the return stroke is easy to deteriorate in the prior art can be solved; implement the technical scheme of the utility model, through fixing the grating on the CF flange through the support, connect two linear drive on the support and control the grating respectively at the ascending linear movement of vertical side and the ascending circular motion of horizontal direction, can realize the adjustment of grating position in the light path and the technological effect of screening wavelength. The constant force spring is arranged on the grating support, so that the return stroke difference caused by a mechanical structure can be effectively reduced, and the technical effect of improving the repeated precision of grating adjustment is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "bottom" and "top," "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Fig. 1 is a front view of the present invention;

fig. 2 is a rear view of the present invention.

In the above drawings, the reference numerals denote:

1, first linear drive

2, CF flange

3, a support rod

4, stent main body

5, optical grating

6, grating support

7, first constant force spring

8, second constant force spring

9, auxiliary rod

10 protective plate

11, third constant force spring

12, second linear drive

13, rotating assembly

14, fourth constant force spring

15, axis of rotation

16, adjusting rod

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Examples

In a specific embodiment, as shown in fig. 1 and fig. 2, an adjusting mechanism of a toroidal grating 5 includes a first linear driver 1, a CF flange 2, a support rod 3, a support body 4, a grating 5, a grating support 6, a first constant force spring 7, a second constant force spring 8, an auxiliary rod 9, a protective plate 10, a third constant force spring 11, a second linear driver 12, a rotating assembly 13, a fourth constant force spring 14, a rotating shaft 15 and an adjusting rod 16.

In the embodiment, the bracket main body 4 is arranged on the CF flange 2, the grating bracket 6 is connected with the bracket main body 4 through the bracket rod 3, and the grating 5 is embedded in the grating bracket 6 through a jacking screw; the first linear drive 1 controls the position of the grating support 6 in the vertical direction in the support body 4, and the position of the grating 5 in the optical path of the system can be finely adjusted through the first linear drive 1; the first constant force spring 7 always provides a downward force so as to reduce the return path difference of the grating 5 in the vertical moving direction and improve the displacement precision of the grating 5; the second linear drive 12 controls the rotation of the grating 5 in the horizontal direction, the displacement in the vertical direction is converted into the rotation in the horizontal direction through the adjusting rod 16 and the rotating component 13, the rotating component 13 is hinged with the adjusting rod 16, or a metal ball is arranged at the joint of the rotating component 13 and the adjusting rod 16, the friction force between the rotating component 13 and the grating support 6 is reduced through the contact of an arc and a plane, the rotating component 13 is fixed on the support main body 4 through the rotating shaft 15, and the rotating component 13 can rotate around the rotating shaft 15;

second constant force spring 8 and third constant force spring 11 are located the final part of auxiliary rod 9, linking bridge main part 4 and auxiliary rod 9, fourth constant force spring 14 provides anticlockwise pivoted power to rotating assembly 13 all the time, third constant force spring 11 and fourth constant force spring 14 provide anticlockwise pivoted power to grating support 6 simultaneously, the return stroke difference that produces when these two power simultaneous actions can reduce grating 5 and rotate in the horizontal direction improves grating 5's repeatability. The protective plate 10 is mounted on the grating support 6 to prevent other parts from touching the grating 5 and damaging the grating 5 when the grating 5 is rotated.

In a preferred embodiment, the first linear driver 1 and the second linear driver 12 use stepping motors as power sources, the precision of each step of the stepping motors is three to five percent, and the error of one step is not accumulated to the next step, so that the position precision and the motion repeatability are better, the repeatability precision in the adjustment process of the grating 5 is further enhanced, the control is convenient, the structure is simple, the cost is low, and the service life of the motors is longer. In the embodiment, an external control computer can be added to control the operation of the stepping motor, and the adjustment precision and the repetition precision of the grating 5 are further controlled through preset parameters.

It should be understood that the above description is only exemplary of the present invention, and is not intended to limit the present invention, and that any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included within the scope of the present invention.

Claims

1. A toroidal grating adjustment mechanism, its characterized in that: the grating linear driving mechanism comprises a first linear driving mechanism, a CF flange, a support rod, a support main body, a grating support, a first constant force spring, a second linear driving mechanism, an adjusting rod, a rotating assembly and a rotating shaft; the support main body is installed on the CF flange, the support rod is fixedly connected with the grating support and the support main body, the grating is installed on the grating support, the first linear drive and the second linear drive are installed on the CF flange and control the grating, the rotating shaft is located on an adjusting rod, the adjusting rod is connected with the CF flange, and the rotating assembly is located on the rotating shaft and connected with the grating support.

2. The toroidal grating conditioning mechanism of claim 1, wherein: the grating is embedded in the grating bracket through a jacking screw.

3. The toroidal grating conditioning mechanism of claim 2, wherein: the rotating assembly is hinged with the grating support.

4. A toroidal grating conditioning mechanism according to claim 3, wherein: the device also comprises a second constant force spring, a third constant force spring, a fourth constant force spring and an auxiliary rod; the second constant force spring and the third constant force spring are connected with the auxiliary rod, and the fourth constant force spring is located on the rotating shaft.

5. The toroidal grating conditioning mechanism of claim 4, wherein: the protection plate is also included; the protection plate is arranged on the grating bracket.

6. The toroidal grating conditioning mechanism of claim 5, wherein: the first and second linear drives comprise stepper motors.

7. The toroidal grating conditioning mechanism of claim 6, wherein: the system further comprises an external computer, and the external computer controls the first linear drive and the second linear drive.