Core-changing type load model for optical turntable

Abstract

The utility model belongs to the technical field of optical load models, and particularly relates to a core-changing type load model for an optical turntable. The device comprises a load block, a first shaft, a second shaft and a connecting piece, the load block is a cube, a first through hole is formed in the center of the load block in the x-axis direction in a penetrating mode, and a second through hole with the hole diameter different from that of the first through hole is formed in the center of the load block in the y-axis direction in a penetrating mode; the first shaft is matched and connected in the first through hole; the second shaft is inserted into the second through hole in a matched mode. The first shaft penetrates through the center of the second shaft. The two connecting pieces are symmetrically fixed to the centers of two ends of the first shaft. The utility model is used for solving the problem of high cost of a plurality of load models.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical load models, and particularly relates to a core-changing type load model for an optical turntable. Background Art

[0002] An optical turntable is a physical measurement instrument that can accurately rotate optical elements or optical systems to achieve observations, measurements, and adjustments at different angles. It usually consists of a rotating platform, a drive system, a control system, etc.

[0003] Currently, the function of an optical turntable is to drive a load to rotate to achieve measurements and observations at different angles. However, before actual assembly and shaping, a dummy load needs to be driven by a driving device for testing first. The dummy load usually uses a load model, and there are usually several requirements for the load model used. One is that the center of gravity of the load model should be kept at the triaxial center position, and the other is that the range of the center of gravity deviation is about plus or minus 1 mm. On the other hand, different optical turntables carry loads of different masses when in use. Therefore, during testing, load models of different masses need to be assembled. In the past, load models of different masses were usually manufactured in batches, and different weight load models could be replaced during testing. However, preparing a batch of load models usually increases the testing cost and replacement time. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a core-changing type load model for an optical turntable to solve the problem of high cost of multiple load models.

[0005] The technical solution of the utility model to solve the above technical problem is as follows: A core-changing type load model for an optical turntable, which comprises:

[0006] A load block, the load block is a cube, and a first through hole is provided through the center of the load block along the x-axis direction, and a second through hole with a diameter different from that of the first through hole is provided through the center of the load along the y-axis direction;

[0007] A first shaft, which is connected to the first through hole in a matching manner;

[0008] A second shaft, which is inserted into the second through hole in a matching manner, and the first shaft penetrates through the center of the second shaft;

[0009] Two connecting pieces, which are symmetrically fixed to the centers of both ends of the first shaft.

[0010] Compared with the prior art, the above technical solution has the following beneficial effects:

[0011] By providing a first through-hole and a second through-hole in the load block and correspondingly arranging a first shaft and a second shaft, when different mass specifications are required, the second shaft can be selected to be removed or inserted to change the mass of the entire load model. The second shaft and the first shaft penetrate through the center of the load block, which can ensure that the center of the overall load block coincides with the center of gravity.

[0012] Based on the above technical solution, the embodiments of the present application can also be improved as follows:

[0013] In one embodiment, a third through-hole is provided through the load center in the z-axis direction, and a third shaft is inserted into the third through-hole in a matching manner, and the first shaft and the second shaft cross through the center of the third shaft.

[0014] The beneficial effect of this step is that in order to increase the range of weight change, the insertion or removal of the third shaft provided in the z-axis is used to change the weight of the entire load model.

[0015] In one embodiment, the square of the diameter of the third shaft is greater than the sum of the square of the diameter of the first shaft and the square of the diameter of the second shaft.

[0016] The beneficial effect of this step is that by limiting the diameters of the three shafts, the third shaft passes through the first shaft and the second shaft in the middle and can ensure that it is not disconnected.

[0017] In one embodiment, the first shaft is radially divided into two sections, and external threads with opposite helix directions are provided on the two sections of the first shaft, and internal threads with opposite helix directions are correspondingly provided inside the first through-hole.

[0018] In one embodiment, at least two groups of convex ribs are circumferentially and evenly spaced on the outer periphery of the second shaft and / or the third shaft, and limiting grooves corresponding to the convex ribs are provided in the second through-hole and the third through-hole.

[0019] In one embodiment, the cross-section of the second shaft and / or the third shaft is a regular polygon or a circle.

[0020] In one embodiment, at least one of the first shaft, the second shaft or the third shaft is made of aluminum, iron, lead or copper.

[0021] The beneficial effect of this step is that inserting shafts made of different materials can meet different weight requirements. Description of the Drawings

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic exploded view of the first shaft, the second shaft, and the third shaft in the present invention.

[0025] Reference numerals:

[0026] 1. Load block; 2. First shaft; 3. Second shaft; 4. Third shaft;

[0027] 5. First through hole; 6. Second through hole; 7. Third through hole; 8. Connecting piece;

[0028] 9. Convex rib; 10. Limiting groove; 11. First through hole; 12. Second through hole. Specific embodiments

[0029] The following will describe in detail the embodiments of the technical solutions of the present invention in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention.

[0030] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0031] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0032] In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of the present invention, "a plurality" means more than two unless otherwise specifically defined.

[0033] In this application, unless otherwise clearly stipulated or limited, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0034] As Figure 1-2 shown, a core-changing type load model for an optical turntable provided by the present utility model includes: a load block 1, a first shaft 2, and a second shaft 3.

[0035] The load block 1 is a cube. A first through hole 5 is provided through the center of the load block 1 along the x-axis direction, and a second through hole 6 with a diameter different from that of the first through hole 5 is provided through the center of the load along the y-axis direction. The first through hole 5 is perpendicular to an outer side surface of the load and runs through the center position of the load along the x-axis direction. The second through hole 6 is also perpendicular to an adjacent outer side surface of the load and is opened through the center position of the load along the y-axis direction. Specifically, the diameter of the second through hole 6 is larger than that of the first through hole 5. Correspondingly, the first shaft 2 is matched and connected to the first through hole 5, and the second shaft 3 is matched and inserted into the second through hole 6. The diameter of the first shaft 2 matches the inner diameter of the first through hole 5, and the diameter of the second shaft 3 matches the inner diameter of the second through hole 6. Since the diameter of the second through hole 6 is larger than that of the first through hole 5, correspondingly, the first shaft 2 passes through the center of the second shaft 3, that is, a first through hole 11 with the same diameter as the first through hole 5 is formed at the center position of the second shaft 3. When connecting, the second shaft 3 is first inserted into the second through hole 6. At this time, the two end faces of the second shaft 3 are flush with the load surface. The first through hole 11 on the second shaft 3 is aligned with the first through hole 5, and then the first shaft 2 is inserted into the first through hole 5 and the first through hole 11 on the second shaft 3 and then matched and connected to the first through hole 5. At this time, the first shaft 2 can play a role in limiting the second shaft 3, and two connecting pieces 8 are symmetrically fixed to the centers of both ends of the first shaft 2. The two connecting pieces 8 are connected and fixed to an external turntable, which plays a role in limiting the first shaft 2, and thus controls and drives the entire load block 1.

[0036] By providing the first through hole 5 and the second through hole 6 on the load block 1 and correspondingly setting the first shaft 2 and the second shaft 3, when different mass specifications are required, the second shaft 3 can be selected to be removed or inserted to change the mass of the entire load model. The second shaft 3 and the first shaft 2 are provided through the center of the load block 1, which can ensure that the center and the center of gravity of the entire load block 1 remain unchanged.

[0037] To improve the diversity of counterweight specifications, a third through-hole 7 is provided through the load center in the z-axis direction. The third through-hole 7 is also opened at the load center position in the z-axis direction perpendicular to the top surface of the load. A third shaft 4 is inserted into the third through-hole 7 in a matching manner. The diameter of the third shaft 4 is the same as the aperture of the third through-hole 7. The first shaft 2 and the second shaft 3 cross through the center of the third shaft 4. Specifically, the aperture of the third through-hole 7 is larger than the apertures of the first through-hole 5 and the second through-hole 6. By inserting or removing the third shaft 4 arranged along the z-axis, the weight of the entire load model can be changed.

[0038] Specifically, to ensure that the third shaft 4 with the first shaft 2 and the second shaft 3 inserted in the middle is not disconnected, the square of the diameter of the third shaft 4 is greater than the sum of the square of the diameter of the first shaft 2 and the square of the diameter of the second shaft 3. As shown in the figure, at this time, when the first shaft 2 and the second shaft 3 cross through the third shaft 4, the middle of the third shaft 4 is not disconnected. Two second through-holes 12 perpendicular to each other are provided at the center of the third shaft 4. The apertures of the two through-holes correspond to and are the same as the apertures of the second through-hole 6 and the first through-hole 5 respectively for the second shaft 3 and the first shaft 2 to pass through. During installation, first insert the third shaft 4, rotate the second through-hole 12 in the third shaft 4 to correspond to the first through-hole 5 and the second through-hole 6. At this time, the two end faces of the third shaft 4 are flush with the load surface. Then insert the second shaft 3. The second shaft 3 passes through the second through-hole 6 and the second through-hole 12 at the center of the third shaft 4, and the two end faces of the second shaft 3 are flush with the load surface. At this time, the second shaft 3 plays a role in limiting the third shaft 4. Then insert the first shaft 2. The first shaft 2 passes through the second through-hole 6, the second through-hole 12 in the third shaft 4, and the first through-hole 11 in the second shaft 3, limiting the second shaft 3 and the third shaft 4. Then the connecting parts 8 at both ends of the first shaft 2 are connected to the external turntable.

[0039] By limiting the diameters of the three shafts, the third shaft 4 passes through the first shaft 2 and the second shaft 3 in the middle and can be ensured not to be disconnected.

[0040] To facilitate the connection and fastening of the first shaft 2, the first shaft 2 is radially divided into two sections. External threads with opposite helix directions are respectively provided on the two sections of the first shaft 2. Opposite helix internal threads are correspondingly provided inside the first through-hole 5. The first shaft 2 is screwed in from both ends of the first through-hole 5 and tightened. After the connecting parts 8 at both ends of the first shaft 2 are connected to the external turntable, during rotation, the threaded connection with opposite helix directions can make the two ends of the first shaft 2 abut against each other, and then the entire load block 1 can be driven to rotate.

[0041] In one embodiment, to ensure the quick and matching insertion and installation of the second shaft 3 and the third shaft 4, at least two groups of ribs 9 are circumferentially and evenly spaced on the outer periphery of the second shaft 3 or the third shaft 4, or at least two groups of ribs 9 are circumferentially and evenly spaced on the outer peripheries of the second shaft 3 and the third shaft 4. Specifically, each group of ribs 9 includes two symmetrically arranged ribs 9, that is, four ribs 9 are circumferentially and evenly spaced on the outer peripheral surfaces of the second shaft 3 and the third shaft 4. The length direction of the ribs 9 is arranged along the axial direction. Corresponding limiting grooves 10 corresponding to the ribs 9 are formed in the second through hole 6 and the third through hole 7. When the second shaft 3 and the third shaft 4 are inserted into the second through hole 6 and the third through hole 7, the first through hole 11 and the second through hole 12 are respectively aligned with the first through hole 5, the second through hole 6 and the third through hole 7, which facilitates the quick insertion and connection of the second shaft 3 and the first shaft 2 later.

[0042] In another embodiment, the cross-section of the second shaft 3 or the third shaft 4 is a regular polygon or a circle, or the cross-sections of the second shaft 3 and the third shaft 4 are regular polygons or circles. The cross-section is the sectional plane in the radial direction of the second shaft 3 and the third shaft 4. Setting the cross-sections of the second shaft 3 and the third shaft 4 as regular polygons or circles can ensure that after the second shaft 3 and the third shaft 4 are inserted, their centers are located at the central position of the load block 1.

[0043] Preferably, the second shaft 3 and the third shaft 4 can have a regular polygon cross-section. In this way, it is possible to omit the ribs 9 provided on the outer peripheral surfaces of the second shaft 3 and the third shaft 4, and omit the limiting grooves 10 provided in the second through hole 6 and the third through hole 7, and still ensure the stability of the shaft.

[0044] To further expand the overall counterweight range of the entire load block 1, the material of the first shaft 2, the second shaft 3 or the third shaft 4 can be changed. At least one of the first shaft 2, the second shaft 3 or the third shaft 4 is made of aluminum, iron, lead or copper. Specifically, by making the shaft of materials with different densities, the counterweight of the shaft is changed, and thus the counterweight of the entire load block 1 is changed.

[0045] The first shaft 2 can be made of aluminum, iron, lead or copper, the second shaft 3 can be made of aluminum, iron, lead or copper, and the third shaft 4 can be made of aluminum, iron, lead or copper. After one or more of the three shafts are formed by metal materials with different densities, the weights of the first shaft 2, the second shaft 3 and the third shaft 4 are changed. Inserting shafts of different materials can meet different weight requirements of different specifications.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A core-changing type load model for an optical turntable, characterized in that, Comprising: A load block, the load block being a cube, with a first through hole penetrating through the center of the load block in the x-axis direction, and a second through hole with a diameter different from that of the first through hole penetrating through the center of the load in the y-axis direction; A first shaft, matingly connected in the first through hole; A second shaft, matingly inserted into the second through hole, the first shaft penetrating through the center of the second shaft; Two connecting members, symmetrically fixed to the centers at both ends of the first shaft.

2. The load model according to claim 1, wherein A third through hole penetrates through the center of the load in the z-axis direction, and a third shaft is matingly inserted into the third through hole, the first shaft and the second shaft cross-penetrating through the center of the third shaft.

3. The load model according to claim 2, wherein, The square of the diameter of the third shaft is greater than the sum of the square of the diameter of the first shaft and the square of the diameter of the second shaft.

4. The load model according to claim 1, wherein The first shaft is radially divided into two sections, and external threads with opposite helix directions are respectively provided on the two sections of the first shaft, and internal threads with opposite helix directions are correspondingly provided inside the first through hole.

5. The load model according to claim 2, wherein At least two groups of convex ribs are circumferentially and evenly spaced on the outer circumference of the second shaft and / or the third shaft, and limiting grooves corresponding to the convex ribs are correspondingly provided in the second through hole and the third through hole.

6. The load model according to claim 2, characterized in that, The cross-section of the second shaft and / or the third shaft is a regular polygon or a circle.

7. The load model according to claim 2, wherein At least one of the first shaft, the second shaft or the third shaft is made of aluminum, iron, lead or copper.

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