Rotary sample containing device for small-angle X-ray scatterometer

Abstract

The invention discloses a rotary sample containing device for a small-angle X-ray scatterometer, and relates to the technical field of liquid X-ray scattering experiments. A rotary sample containing device for a small-angle X-ray scatterometer comprises a shell, a cover plate, a plurality of sample placing assemblies, a sample changing rotating shaft and a sample changing motor, wherein the cover plate covers the shell and is provided with a plurality of through holes; the sample placing assemblies are arranged in the shell and penetrate through the through holes; the sample changing rotating shaft penetrates through the cover plate and the center of the shell; the rotating assembly is arranged in the shell and can be matched with the sample placing assembly in sequence; the sample placing assembly comprises a sample placing gear, a bearing sleeved with the sample placing gear, an L-shaped fixing arm with the two ends connected to the bearing and the sample changing rotating shaft respectively, and a sample table fixedly connected with the bearing. The rotary sample containing device for the small-angle X-ray scatterometer can measure a plurality of samples at the same time, can properly rotate anisotropic samples in a plane perpendicular to a light beam, effectively reduces repeated pumping / unloading pumping in the actual detection process, and has the advantages of simple structure, high detection efficiency and the like.

Description

Technical Field

[0001] The invention relates to the technical field of X-ray scattering experiments, and in particular to a rotating sample holding device for a small-angle X-ray scattering instrument. Background Art

[0002] Small Angle X-Ray Scattering (SAXS) is a physical method for studying the geometric structure of matter at the nanoscale, and is widely used in the study of isotropic and anisotropic structural materials. Traditional small angle X-ray scattering instruments use sample holders as a fixed method. After the sample is placed in the vacuum sample chamber, the position of the sample cannot be adjusted. Each measurement can only detect one sample. During the sample replacement process, it is necessary to repeatedly pump / unload the air. The frequent pump / unload process causes great wear and tear on the equipment, and the detection efficiency is low. Summary of the invention

[0003] The object of the present invention is to provide a rotating sample holding device for a small-angle X-ray scattering instrument, which can measure multiple samples at the same time, and for anisotropic samples, can be properly rotated in a plane perpendicular to the light beam so that the corresponding image is located in the vertical direction of the light spot, thereby obtaining the best spatial resolution and the minimum scattering angle, and effectively reducing the need for repeated pumping / unloading during the actual detection process. The rotating sample holding device for a small-angle X-ray scattering instrument of the present invention has the advantages of simple structure, high detection efficiency, etc.

[0004] The embodiment of the present invention is achieved as follows: A rotating sample holding device for a small-angle X-ray scattering instrument, comprising a housing, a cover plate disposed on the housing and having a plurality of through holes, a plurality of sample placing components disposed in the housing and passing through the through holes, a sample changing rotating shaft passing through the center of the cover plate and the housing, a sample changing rotating shaft connected to the sample changing rotating shaft, and a rotating component disposed in the housing and capable of sequentially cooperating with the sample placing components; The lofting assembly includes a lofting gear, a bearing sleeved in the lofting gear, an L-shaped fixed arm with two ends respectively connected to the bearing and the sample changing shaft, and a sample stage arranged in the through hole and fixedly connected to the bearing. The lofting gear, the bearing and the sample stage are coaxial.

[0005] Furthermore, in a preferred embodiment of the present invention, the above-mentioned rotating assembly includes a driving gear sleeved on the sample changing shaft, an auxiliary gear matched with the driving gear, a reciprocating mechanism connected to the auxiliary gear at one end, a sleeve fixedly connected to the reciprocating mechanism, a rotating shaft sleeved in the sleeve and movably connected to the sleeve, a rotating gear fixedly connected to one end of the rotating shaft, and a rotating motor connected to the other end of the rotating shaft; the rotating gear can sequentially match with the sample lofting gear.

[0006] Furthermore, in a preferred embodiment of the present invention, the reciprocating mechanism includes a first swing arm with one end fixedly connected to the auxiliary gear, a second swing arm movably connected to one end of the first swing arm away from the auxiliary gear, and a straight rod connected to the other end of the second swing arm.

[0007] Furthermore, in a preferred embodiment of the present invention, the rotating assembly further comprises a guide groove fixedly arranged at the bottom of the shell, and the straight rod can slide in the guide groove.

[0008] Furthermore, in a preferred embodiment of the present invention, the number of the above-mentioned lofting components is n, and the transmission ratio between the driving gear and the auxiliary gear is 1 / n.

[0009] Furthermore, in a preferred embodiment of the present invention, there are six lofting components, and the transmission ratio between the driving gear and the auxiliary gear is 1 / 6.

[0010] Furthermore, in a preferred embodiment of the present invention, the sample-changing shaft passes through the center of the circle formed by the lofting components.

[0011] Furthermore, in a preferred embodiment of the present invention, the above-mentioned lofting components are evenly arranged in the circumferential direction of the shell.

[0012] Furthermore, in a preferred embodiment of the present invention, the L-shaped fixed arm includes a first fixed arm perpendicular to the sample changing axis and a second fixed arm parallel to the sample changing axis, and a plurality of the first fixed arms are on a first plane.

[0013] Furthermore, in a preferred embodiment of the present invention, the driving gear, the auxiliary gear, the first swing arm, the second swing arm, and the straight rod are on the second plane, and the bottom wall of the shell, the second plane, the first plane and the cover plate are arranged in sequence.

[0014] The beneficial effects of the embodiments of the present invention are as follows: the rotating sample holding device for a small-angle X-ray scattering instrument of the present invention can measure multiple samples at the same time, and appropriately rotate the anisotropic sample in a plane perpendicular to the light beam, thereby obtaining the best spatial resolution and minimum scattering angle, effectively reducing repeated pumping / unloading during the actual detection process, and has the advantages of simple structure and high detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic structural diagram of a housing, a cover plate, a sample setting component, a sample changing shaft, a sample changing motor, a rotating component and a sample to be tested according to an embodiment of the present invention; Figure 2 It is a schematic structural diagram of a housing, six lofting components, and a rotating component according to an embodiment of the present invention; Figure 3 Another structural schematic diagram of a housing, a cover plate, a sample placement component, a sample changing shaft, a sample changing motor, a rotating component and a sample to be tested according to an embodiment of the present invention; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] Icons: 100-rotating sample holding device for small-angle X-ray scattering instrument; 110-housing; 120-cover plate; 130-sample placing assembly; 140-sample changing shaft; 150-sample changing motor; 160-rotating assembly; 121-through hole; 131-sample placing gear; 132-bearing; 133-L-shaped fixed arm; 134-sample stage; 135-first fixed arm; 136-second fixed arm; 161-driving gear; 162-auxiliary gear; 163-first swing arm; 164-second swing arm; 165-straight rod; 166-guide groove; 167-sleeve; 168-rotating shaft; 169-rotating gear; 170-rotating motor; 190-sample to be tested. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0021] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invented product is usually placed when in use, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0023] Please refer to Figure 1-Figure 3 The present embodiment provides a rotating sample holding device 100 for a small-angle X-ray scattering instrument, including a shell 110, a cover plate 120, six sample placement components 130, a sample changing shaft 140, a sample changing motor 150 and a rotating component 160. The cover plate 120 is covered on the shell 110 to form a cavity, and six through holes 121 are opened on the cover plate 120. The sample placement component 130 is arranged in the shell 110 and passes through the through holes 121 of the cover plate 120. The sample changing shaft 140 passes through the center of the cover plate 120 and the shell 110. When the sample changing shaft 140 is rotated, the cover plate 120 and the shell 110 rotate at the same time. The sample changing motor 150 is connected to the sample changing shaft 140. The rotating component 160 is arranged in the cavity, and when the sample changing shaft 140 is rotated, the rotating component 160 can cooperate with the sample placement component 130 in sequence. It should be noted that, Figure 1 and Figure 3In order to clearly show all structures of the rotating sample holding device 100 for a small-angle X-ray scattering instrument, only one sample placing assembly 130 is shown.

[0024] Green Reference Figure 1-Figure 4 The sample setting assembly 130 includes a sample setting gear 131, a bearing 132, an L-shaped fixed arm 133 and a sample stage 134. The bearing 132 is sleeved in the sample setting gear 131. The two ends of the L-shaped fixed arm 133 are respectively fixedly connected to the bearing 132 and the sample changing shaft 140. The sample stage 134 is arranged in the through hole 121 and is fixedly connected to the bearing 132. The sample setting gear 131, the bearing 132 and the sample stage 134 are coaxial. The sample 190 to be tested is placed on the sample stage 134. It should be noted that in this embodiment, the number of the lofting components 130 is 6, and the number of through holes 121 corresponding thereto is also 6. In other embodiments, the number of the lofting components 130 and the through holes 121 may also be other numbers. As long as one lofting component 130 corresponds to one through hole 121, the sample stage 134 in the through hole 121 of this embodiment can be used to place the sample 190 to be tested, and the position of the lofting component 130 can be rotated to achieve the transformation of the sample 190 to be tested, which is within the protection scope of this embodiment. The sample changing shaft 140 passes through the center of the circle surrounded by the lofting components 130, so that when the sample changing shaft 140 rotates, the lofting components 130 can be rotated to the position to be tested. In this embodiment, the lofting components 130 are evenly arranged in the circumferential direction of the housing 110. The L-shaped fixing arm 133 includes a first fixing arm 135 perpendicular to the sample changing rotation axis 140 and a second fixing arm 136 parallel to the sample changing rotation axis 140 , and the plurality of first fixing arms 135 are on a first plane.

[0025] Please continue to refer to Figure 1-Figure 4The rotating assembly 160 includes a driving gear 161, an auxiliary gear 162, a first swing arm 163, a second swing arm 164, a straight rod 165, a guide groove 166, a sleeve 167, a rotating shaft 168, a rotating gear 169 and a rotating motor 170. Among them, the driving gear 161 is sleeved on the sample changing shaft 140. The auxiliary gear 162 cooperates with the driving gear 161. One end of the first swing arm 163 is fixedly connected to the center of the auxiliary gear 162 through a rotating shaft, and the other end is movably connected to one end of the second swing arm 164. The first swing arm 163, the second swing arm 164, the straight rod 165, and the sleeve 167 are fixedly connected in sequence. And the first swing arm 163, the second swing arm 164 and the straight rod 165 form a reciprocating mechanism. Under the rotation of the auxiliary gear 162, the reciprocating mechanism reciprocates along the radial direction of the housing 110. The driving gear 161, the auxiliary gear 162, the first swing arm 163, the second swing arm 164, and the straight rod 165 are on the second plane. The bottom wall of the housing 110, the second plane, the first plane and the cover plate 120 are arranged in sequence. The sleeve 167 of the rotating shaft 168 is sleeved in the sleeve 167 and is movably connected to the sleeve 167. One end of the rotating shaft 168 is fixedly connected to the rotating gear 169, and the other end is connected to the rotating motor 170. The guide groove 166 is fixedly set on the bottom wall of the housing 110, and the straight rod 165 can slide in the guide groove 166 to better control the movement direction of the straight rod 165.

[0026] When the sample changing shaft 140 is rotated, the driving gear 161 drives the auxiliary gear 162 to rotate, and at the same time, the first swing arm 163, the second swing arm 164 and the straight rod 165 drive the sleeve 167 to reciprocate, thereby realizing the reciprocating motion of the rotating gear 169 in the radial direction of the housing 110, and realizing the sequential matching of the rotating gear 169 and the lofting gear 131. After the rotating gear 169 and the lofting gear 131 are externally engaged to form a match, starting the rotating motor 170 can realize the rotation of the rotating gear 169, thereby driving the lofting assembly 130 to rotate. In this embodiment, the number of lofting assemblies 130 is 6, and they are evenly distributed in the circumferential direction of the housing 110. Therefore, during the sample detection process, the sample changing shaft 140 rotates 60 degrees to realize the conversion of one lofting assembly 130 to the next lofting assembly 130. In this embodiment, the transmission ratio of the driving gear 161 and the auxiliary gear 162 is 1 / 6. When the driving gear 161 rotates 60 degrees along with the sample changing shaft 140, the auxiliary gear 162 rotates one circle, driving the rotating gear 169 to make a reciprocating motion, thereby realizing the coordination between the rotating gear 169 and the next rotating gear 169. The rotating motor 170 is rotated, the rotating shaft 168 rotates, and the sample stage 134 is driven by the rotating gear 169 to rotate appropriately in a plane perpendicular to the light beam, thereby obtaining the best spatial resolution and the smallest scattering angle, and facilitating the acquisition of a one-dimensional scattering curve of anisotropic samples.

[0027] It should be noted that in this embodiment, the six lofting components 130 are evenly distributed in the direction of the rotating shaft of the housing 110, and the transmission ratio of the driving gear 161 and the auxiliary gear 162 is 1 / 6, so that when a sample is changed for detection, the rotating component 160 is switched to the sample, and its rotation is controlled by the rotating gear 169, so that the one-dimensional scattering curve of the anisotropic sample is more conveniently obtained. Thereby, the technical effect of changing the sample for detection without pumping / unloading the vacuum is achieved, and each sample is rotated to obtain the one-dimensional scattering curve of the anisotropic sample. In other embodiments, the number of the lofting components 130 can be n, evenly distributed in the circumferential direction of the housing 110, the sample changing shaft 140 passes through the center of the circle surrounded by the lofting components 130, and the transmission ratio of the driving gear 161 and the auxiliary gear 162 is 1 / n, so as to achieve the above-mentioned technical effect of this embodiment, which is also within the protection scope of this embodiment.

[0028] The working principle of the rotating sample holding device 100 for the small-angle X-ray scattering instrument of this embodiment is: 1. Align the sample 1 of a sample placement component 130 of the rotating sample holding device 100 for the small-angle X-ray scattering instrument with the light beam; 2. Rotate the rotating shaft 168, and the rotating gear 169 drives the sample stage 134 to rotate appropriately in a plane perpendicular to the light beam, so as to obtain the best spatial resolution and the smallest scattering angle, and detect the sample 1; 3. After the detection is completed, start the sample replacement shaft 140 to align the sample 2 with the light beam, and at the same time, the reciprocating mechanism of the rotating component 160 completes one reciprocation, so as to realize the separation of the sample placement component 130 where the sample 1 is located and the engagement with the sample placement component 130 where the sample 2 is located; 4. Repeat steps 2-3 to realize the detection of samples 1-6.

[0029] In summary, the present invention provides a rotating sample holding device for a small-angle X-ray scattering instrument that can measure multiple samples simultaneously, and for anisotropic samples, can be properly rotated in a plane perpendicular to the light beam so that the corresponding image is located in the vertical direction of the light spot, thereby obtaining the best spatial resolution and minimum scattering angle, and effectively reducing the need for repeated pumping / unloading during actual detection. The rotating sample holding device for a small-angle X-ray scattering instrument of the present invention has the advantages of simple structure, high detection efficiency, etc.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A rotating sample holding device for a small angle X-ray scattering instrument, characterized in that: It comprises a shell, a cover plate which is arranged on the shell and has a plurality of through holes, a plurality of sample placing components which are arranged in the shell and pass through the through holes, a sample changing shaft which passes through the center of the cover plate and the shell, a sample changing motor connected to the sample changing shaft, and a rotating component which is arranged in the shell and can cooperate with the sample placing components in sequence; The lofting assembly includes a lofting gear, a bearing sleeved in the lofting gear, an L-shaped fixed arm with two ends respectively connected to the bearing and the sample changing shaft, and a sample stage arranged in the through hole and fixedly connected to the bearing. The lofting gear, the bearing and the sample stage are coaxial.

2. A rotating sample holding device for a small angle X-ray scattering instrument according to claim 1, characterized in that: The rotating assembly includes a driving gear sleeved on the sample changing shaft, an auxiliary gear matched with the driving gear, a reciprocating mechanism connected to the auxiliary gear at one end, a sleeve fixedly connected to the reciprocating mechanism, a rotating shaft sleeved in the sleeve and movably connected to the sleeve, a rotating gear fixedly connected to one end of the rotating shaft, and a rotating motor connected to the other end of the rotating shaft; the rotating gear can sequentially match with the sample lofting gear.

3. The rotating sample holding device for small angle X-ray scattering instrument according to claim 2, characterized in that: The reciprocating mechanism includes a first swing arm with one end fixedly connected to the auxiliary gear, a second swing arm movably connected to one end of the first swing arm away from the auxiliary gear, and a straight rod connected to the other end of the second swing arm.

4. The rotating sample holding device for small angle X-ray scattering instrument according to claim 2, characterized in that: The rotating assembly further comprises a guide groove fixedly arranged at the bottom of the shell, and the straight rod can slide in the guide groove.

5. The rotating sample holding device for small angle X-ray scattering instrument according to claim 2, characterized in that: There are n lofting components, and the transmission ratio between the driving gear and the auxiliary gear is 1 / n.

6. The rotating sample holding device for small angle X-ray scattering instrument according to claim 5, characterized in that: There are six lofting components, and the transmission ratio between the driving gear and the auxiliary gear is 1 / 6.

7. The rotating sample holding device for small angle X-ray scattering instrument according to claim 1, characterized in that: The sample changing rotating shaft passes through the center of the circle formed by the lofting components.

8. The rotating sample holding device for small angle X-ray scattering instrument according to claim 7, characterized in that: The lofting components are evenly arranged in the circumferential direction of the shell.

9. The rotating sample holding device for small angle X-ray scattering instrument according to claim 2, characterized in that: The L-shaped fixed arm includes a first fixed arm perpendicular to the sample changing rotation axis and a second fixed arm parallel to the sample changing rotation axis, and a plurality of the first fixed arms are on a first plane.

10. The rotating sample holding device for small angle X-ray scattering instrument according to claim 9, characterized in that: The driving gear, the auxiliary gear, the first swing arm, the second swing arm, and the straight rod are on the second plane, and the bottom wall of the shell, the second plane, the first plane, and the cover plate are arranged in sequence.

Images