A lifting and adjusting device for a specimen in a scanning tunneling microscope
By using a combination of suspension ropes and pulleys with a take-up and take-down mechanism, the problem of limited lifting height and jamming in the lifting device of the scanning tunneling microscope was solved, enabling a larger stroke lifting adjustment and cost reduction.
Patent Information
- Application Number
- CN202521713448.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-13
- Publication Date
- 2026-07-03
- Estimated Expiration
- 2035-08-13
AI Technical Summary
Existing scanning tunneling microscopes have problems with the lifting device for the test piece, such as limited lifting height, high manufacturing difficulty, high cost, and lifting jamming.
The device employs a suspension rope and pulley system in conjunction with a raising and lowering mechanism. The height of the test piece is adjusted by raising and lowering the suspension rope, and the test piece is locked in place by engaging the meshing teeth on the rotating shaft with the mounting base to prevent jamming.
This technology enables a larger stroke lifting and lowering of the test piece, reduces costs, avoids lifting jamming, and improves the flexibility and reliability of the device.
Smart Images
Figure CN224450048U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a lifting and adjusting device for a specimen under test in a scanning tunneling microscope. Background Technology
[0002] Currently, in the use of scanning tunneling microscopes, the height of the specimen is adjusted via a rotary cylinder lifting device. This involves setting steps of different heights on the rotary cylinder, with slots connecting the steps. The lifting device rests on these steps, and as the cylinder rotates, it slides within the slots, thus raising or lowering the specimen to the appropriate height. The disadvantage of this device is that…
[0003] The lifting height is limited by the height of the rotating drum; the greater the lifting height, the more difficult it is to manufacture the rotating drum.
[0004] The cost is relatively higher;
[0005] Uneven grooves between steps can cause the lifting mechanism to jam, requiring high precision in the step processing. Utility Model Content
[0006] The purpose of this invention is to provide a lifting and adjusting device for a test piece in a scanning tunneling microscope, which allows the test piece to have a large stroke while maintaining a relatively low cost and preventing lifting jamming.
[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0008] A lifting and adjusting device for a specimen in a scanning tunneling microscope includes a support frame, a pulley block rotatably mounted on the support frame about its own axis, a suspension rope tensioned on the outside of the pulley block, a lifting mechanism connected to one end of the suspension rope for lifting and lowering the rope, a lifting mechanism connected to the other end of the suspension rope for mounting the specimen, and a guiding mechanism for guiding the lifting mechanism.
[0009] The take-up and release mechanism includes a mounting base, a rotating shaft for winding the suspension rope and rotatably passing through the mounting base about its own axis, the rotating shaft also slidingly passing through the mounting base along its axial direction, the take-up and release mechanism further includes a first meshing tooth provided on the rotating shaft, a second meshing tooth provided in the mounting base, a first elastic element, and a driving member for sleeved on one end of the rotating shaft to compress the first elastic element and drive the rotating shaft to rotate, the first elastic element being used to provide an elastic restoring force to drive the rotating shaft to move and reset along its axial direction so that the first meshing tooth and the second meshing tooth mesh with each other.
[0010] Preferably, the rotating shaft has a first position and a second position relative to the mounting base:
[0011] When the rotating shaft is in the first position relative to the mounting base, the first meshing tooth and the second meshing tooth mesh with each other;
[0012] When the rotating shaft is in the second position relative to the mounting base, the first meshing teeth and the second meshing teeth are arranged sequentially at intervals along the axial direction of the rotating shaft.
[0013] Preferably, one end of the first elastic member abuts against the inner surface of the mounting base, and the rotating shaft is provided with a first limiting ring for abutting the other end of the first elastic member.
[0014] More preferably, the first elastic element is a spring sleeved on the rotating shaft, and the spring, the first limiting retaining ring, and the rotating shaft are arranged coaxially.
[0015] Preferably, the mounting base includes a first base and a second base arranged at intervals along the length extension direction of the rotating shaft, the first elastic element is disposed in the first base, and the second meshing tooth is disposed in the second base.
[0016] More preferably, the suspension rope is wound around the middle section of the shaft exposed between the first base and the second base.
[0017] Preferably, the pulley block includes a first pulley and a second pulley that are rotatable about their own axis and are disposed on opposite sides of the support frame. The retraction mechanism is disposed below the first pulley, and the lifting mechanism is disposed below the second pulley.
[0018] Preferably, the lifting mechanism includes a main body with a hollow inner cavity and a guide member protruding from the outside of the main body. The guide mechanism includes a column with a guide groove, and the guide member is slidably disposed in the guide groove.
[0019] More preferably, there are multiple guide members that are evenly spaced along the circumferential direction.
[0020] More preferably, the lifting mechanism further includes a second elastic member disposed in the main body and whose upper end is used to connect to the suspension rope, and a connector connected to the lower end of the second elastic member and located below the main body. The connector is used to install the test piece, and the through hole at the top of the main body for inserting the suspension rope is smaller than the outer diameter of the second elastic member.
[0021] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art: The lifting and adjusting device of this utility model for the test piece in a scanning tunneling microscope has the following advantages:
[0022] The suspension rope is tensioned on the outside of the pulley block. By raising and lowering the suspension rope, the height of the workpiece to be measured can be freely adjusted. The pulley block and suspension rope can prevent the workpiece from getting stuck during lifting or lowering.
[0023] By configuring the initial length of the suspension rope, the test piece can have a large stroke, and the cost is relatively low.
[0024] By setting an axially sliding shaft in the mounting base, the shaft not only serves to raise and lower the hoisting rope, but also acts as a limiter by engaging the first meshing teeth on its surface with the second meshing teeth in the mounting base, so as to keep the test piece at the corresponding height. Attached Figure Description
[0025] Appendix Figure 1 This is a schematic diagram of the lifting and adjusting device according to a specific embodiment of the present utility model;
[0026] Appendix Figure 2 For the appendix Figure 1 Schematic diagram of the middle receiving and releasing mechanism;
[0027] Appendix Figure 3 For the appendix Figure 2 A cross-sectional view of the structure along the central axis (with the pivot in the second position);
[0028] Appendix Figure 4 For the appendix Figure 2 A cross-sectional view of the structure along the central axis (with the pivot in the first position);
[0029] Appendix Figure 5 For the appendix Figure 1 Schematic diagram of the lifting mechanism;
[0030] Appendix Figure 6 For the appendix Figure 5 A schematic diagram of the cross-sectional structure along the central axis.
[0031] Among them: 1. Support frame;
[0032] 2. Pulley system; 21. First pulley; 22. Second pulley;
[0033] 3. Suspension rope;
[0034] 4. Retracting / unloading mechanism; 41. Mounting base; 411. First base; 412. Second base; 42. Rotating shaft; 421. First limiting retaining ring; 422. Second limiting retaining ring; 423. Irregular hole; 43. First meshing tooth; 44. First elastic element;
[0035] 5. Lifting mechanism; 51. Main body; 52. Guide component; 53. Second elastic component; 54. Connecting component;
[0036] 6. Guiding mechanism; 61. Column; 611. Guide groove. Detailed Implementation
[0037] The technical solution of this utility model will be further described below with reference to specific embodiments and accompanying drawings.
[0038] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.
[0039] In the description of the embodiments of this utility model, it should be understood that the terms "length", "inner", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of this utility model.
[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0041] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.
[0042] In this embodiment of the invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0043] The following disclosure provides many different implementations or examples for different structures of the embodiments of the present invention. To simplify the disclosure of the embodiments of the present invention, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. Furthermore, reference numerals and / or reference letters may be repeated in different examples of the embodiments of the present invention; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed.
[0044] See Figure 1 As shown, this embodiment provides a lifting and adjusting device for a workpiece under test in a scanning tunneling microscope, including a support frame 1, a pulley block 2 rotatably mounted on the support frame 1 about its own axis, a suspension rope 3 tensioned on the outside of the pulley block 2, a raising and lowering mechanism 4 connected to one end of the suspension rope 3 for raising and lowering the suspension rope 3, a lifting mechanism 5 connected to the other end of the suspension rope 3 for mounting the workpiece under test, and a guiding mechanism 6 for guiding the lifting mechanism 5.
[0045] See Figure 2-4 As shown, the take-up and release mechanism 4 includes a mounting base 41, a rotating shaft 42 for winding the lifting rope 3 and rotatable about its own axis, which passes through the mounting base 41. The rotating shaft 42 can also slide along its axial direction through the mounting base 41. The take-up and release mechanism 4 also includes a first meshing tooth 43 on the rotating shaft 42, a second meshing tooth (not shown) in the mounting base 41, a first elastic element 44, and a driving element (not shown) for engaging one end of the rotating shaft 42. The driving element is inserted into the rotating shaft 42 through a shaped hole 423 on one end of the rotating shaft 42, first driving the rotating shaft 42 to move axially to compress the first elastic element 44, causing the first meshing tooth 43 and the second meshing tooth to disengage from each other, and then driving the rotating shaft 42 to rotate. After the test piece is raised or lowered to the correct position, the driving element is pulled out. The first elastic element 44 then provides an elastic restoring force to drive the rotating shaft 42 to return to its axial position. After the rotating shaft 42 returns to its original position, the first meshing tooth 43 and the second meshing tooth engage with each other to achieve locking.
[0046] The rotating shaft 42 has a first position and a second position relative to the mounting base 41:
[0047] See Figure 4 As shown, when the rotating shaft 42 is in the first position relative to the mounting base 41, the first meshing tooth 43 and the second meshing tooth mesh with each other. At this time, the rotating shaft 42 cannot rotate, and the test piece is locked at the corresponding height.
[0048] See Figure 3 As shown, when the rotating shaft 42 is in the second position relative to the mounting base 41, the first meshing tooth 43 and the second meshing tooth are arranged sequentially and alternately along the axial direction of the rotating shaft 42. At this time, the rotating shaft 42 can rotate relative to the mounting base 41, and the test piece can move up and down under the drive of the suspension rope 3.
[0049] See Figure 3-4 As shown, one end of the first elastic member 44 abuts against the inner surface of the mounting base 41, and the rotating shaft 42 is provided with a first limiting ring 421 for abutting against the other end of the first elastic member 44.
[0050] In this embodiment, the first elastic element 44 is a spring sleeved on the rotating shaft 42, and the spring, the first limiting ring 421 and the rotating shaft 42 are arranged coaxially.
[0051] Mounting base 41 includes a first base 411 and a second base 412 arranged sequentially at intervals along the length extension direction of the rotating shaft 42. A first elastic member 44 is disposed in the first base 411, and a second meshing tooth is disposed in the second base 412.
[0052] The suspension rope 3 is wound around the middle section of the rotating shaft 42 exposed between the first base 411 and the second base 412. A first limiting ring 421 is provided on the outside of the first base 411, and a second limiting ring 422 is also provided on the rotating shaft 42 on the outside of the second base 412. The suspension rope 3 is wound between the first limiting ring 421 and the second limiting ring 422 to avoid interference with the first elastic member 44 and the first meshing tooth 43.
[0053] See Figure 1 As shown, the pulley block 2 includes a first pulley 21 and a second pulley 22, which are rotatable about their own axes and located on opposite sides of the support frame 1. The take-up and release mechanism 4 is located below the first pulley 21, and the lifting mechanism 5 is located below the second pulley 22. This arrangement provides ample space for the lifting mechanism 5 and the guide mechanism 6, preventing them from interfering with the rising section of the hoisting rope 3.
[0054] See Figure 5-6 As shown, the lifting mechanism 5 includes a main body 51 with a hollow inner cavity and a guide member 52 protruding from the outside of the main body 51. The guide mechanism 6 includes a column 61 with a guide groove 611, the guide groove 611 is arranged in the vertical direction, and the guide member 52 is slidably disposed in the guide groove 611.
[0055] There are multiple guide members 52 and they are evenly spaced along the circumferential direction. In this embodiment, there are three guide members 52 and two columns 61. The two columns 61 and the support frame 1 are evenly spaced along the circumferential direction, and one guide groove 611 is provided on the support frame 1.
[0056] The lifting mechanism 5 also includes a second elastic member 53 disposed in the main body 51 and used to connect the upper end of the suspension rope 3, and a connector 54 connected to the lower end of the second elastic member 53 and located below the main body 51. The connector 54 is used to install the test piece. The through hole at the top of the main body 51 for inserting the suspension rope 3 is smaller than the outer diameter of the second elastic member 53 to prevent the second elastic member 53 from extending upward out of the main body 51.
[0057] Because the lifting adjustment device is equipped with a limiting member (not shown in the figure) for limiting the maximum height of the connecting member 54, when the connecting member 54 is limited, in order to prevent the lifting rope 3 from being unable to pull and thus causing the rotating shaft 42 to be unable to rotate, which in turn makes it difficult for the first meshing tooth 43 and the second meshing tooth to mesh, the second elastic member 53 is provided to allow the rotating shaft 42 to continue to rotate, so that the rotating shaft 42 can rotate to the next meshing tooth position, so that the first meshing tooth 43 and the second meshing tooth mesh with each other to achieve locking.
[0058] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A lifting and adjusting device for a specimen under test in a scanning tunneling microscope, characterized in that: It includes a support frame, a pulley block rotatably mounted on the support frame about its own axis, a suspension rope tensioned on the outside of the pulley block, a take-up and release mechanism connected to one end of the suspension rope for taking up and releasing the suspension rope, a lifting mechanism connected to the other end of the suspension rope for mounting the test piece, and a guide mechanism for guiding the lifting mechanism. The take-up and release mechanism includes a mounting base, a rotating shaft for winding the suspension rope and rotatably passing through the mounting base about its own axis, the rotating shaft also slidingly passing through the mounting base along its axial direction, the take-up and release mechanism further includes a first meshing tooth provided on the rotating shaft, a second meshing tooth provided in the mounting base, a first elastic element, and a driving member for sleeved on one end of the rotating shaft to compress the first elastic element and drive the rotating shaft to rotate, the first elastic element being used to provide an elastic restoring force to drive the rotating shaft to move and reset along its axial direction so that the first meshing tooth and the second meshing tooth mesh with each other.
2. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 1, wherein: The rotating shaft has a first position and a second position relative to the mounting base: When the rotating shaft is in the first position relative to the mounting base, the first meshing tooth and the second meshing tooth mesh with each other; When the rotating shaft is in the second position relative to the mounting base, the first meshing teeth and the second meshing teeth are arranged sequentially at intervals along the axial direction of the rotating shaft.
3. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 1, wherein: One end of the first elastic element abuts against the inner surface of the mounting base, and the rotating shaft is provided with a first limiting ring for abutting the other end of the first elastic element.
4. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 3, wherein: The first elastic element is a spring sleeved on the rotating shaft, and the spring, the first limiting retaining ring, and the rotating shaft are arranged coaxially.
5. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 1, wherein: The mounting base includes a first base and a second base arranged at intervals along the length extension direction of the rotating shaft, the first elastic element is disposed in the first base, and the second meshing tooth is disposed in the second base.
6. The lifting and adjusting device for a specimen in a scanning tunneling microscope according to claim 5, characterized in that: The suspension rope is wound around the middle section of the shaft exposed between the first base and the second base.
7. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 1, wherein: The pulley assembly includes a first pulley and a second pulley, which are rotatable about their own axis and are located on opposite sides of the support frame. The retraction mechanism is located below the first pulley, and the lifting mechanism is located below the second pulley.
8. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 1, wherein: The lifting mechanism includes a main body with a hollow inner cavity and a guide member protruding from the outside of the main body. The guide mechanism includes a column with a guide groove, and the guide member is slidably disposed in the guide groove.
9. The lift adjustment device for a sample in a scanning tunneling microscope according to claim 8, wherein: The guide members are multiple and evenly spaced along the circumferential direction.
10. The lift adjustment device for a sample in a scanning tunneling microscope of claim 8, wherein: The lifting mechanism further includes a second elastic element disposed in the main body and whose upper end is used to connect to the suspension rope, and a connector connected to the lower end of the second elastic element and located below the main body. The connector is used to install the test piece, and the through hole at the top of the main body for inserting the suspension rope is smaller than the outer diameter of the second elastic element.