Three-degree-of-freedom rotating platform

Abstract

The present invention provides a three-degree-of-freedom rotating platform, including a base platform, a first translation component, and a second translation component. The base platform can be driven to rotate, a first direction guiding structure is provided on the base platform, the first translation component is slidably connected to the first direction guiding structure, a second direction guiding structure is provided on the first translation component, the second translation component is slidably connected to the second direction guiding structure, and the projection of the guiding direction of the first direction guiding structure and the guiding direction of the second direction guiding structure on a plane perpendicular to the rotation axis of the base platform has an angle α, 0°<α<180°. A three-degree-of-freedom rotating platform of the present invention can flexibly and dynamically adjust the position of a load to be treated, can realize automatic control of adjustment, high adjustment accuracy, fast adjustment speed, and the rotating platform has a simple and compact structure and high reliability.

Description

Technical Field

[0001] The invention belongs to the field of biochemical detection, and in particular relates to a three-degree-of-freedom rotating platform. Background Art

[0002] Rotating platforms are widely used in scientific research and industrial production. Especially in biochemical detection and analysis, it is often necessary to place the sample to be detected on the rotating platform, and the detection platform detects the sample to be detected at any angle. At the same time, another two-degree-of-freedom motion mechanism is required to adjust the relative position between the sample to be detected and the rotation center, so as to ensure that the instrument can achieve high-precision detection. In industrial production, a high-speed rotating mechanism is often required. In order to balance the force of the rotating shaft, it is necessary to adjust the position of the center of mass of the load through an additional two-degree-of-freedom motion mechanism so that the rotating shaft intersects with the center of mass of the rotating load. At present, most of the existing three-degree-of-freedom rotating platforms in China cannot realize the dynamic adjustment of the load position, or have shortcomings such as slow rotation speed and low precision, and cannot meet the needs of application in scientific research and industrial production. Based on this deficiency, the present invention is proposed. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to provide a three-degree-of-freedom rotating platform that can flexibly and dynamically adjust the position of the load, can achieve automatic control of the adjustment, high adjustment accuracy, fast adjustment speed, and the rotating platform has a simple and compact structure and high reliability.

[0004] In order to solve the above problems, the present invention provides a three-degree-of-freedom rotation platform, including a base platform, a first translation component, and a second translation component. The base platform can be driven to rotate, and a first direction guide structure is provided on the base platform. The first translation component is slidably connected to the first direction guide structure. A second direction guide structure is provided on the first translation component, and the second translation component is slidably connected to the second direction guide structure. The guiding direction of the first direction guide structure and the projection of the guiding direction of the second direction guide structure on a plane perpendicular to the rotation axis of the base platform have an angle α, 0°<α<180°.

[0005] Preferably, the base platform includes a platform body and a rotating shaft located on one side of the platform body and coaxially arranged with the platform body, and a accommodating cavity is also constructed on the side of the platform body away from the rotating shaft, the first direction guiding structure is located in the accommodating cavity, and the first translation component can translate along the first direction in the accommodating cavity.

[0006] Preferably, the first direction guiding structure comprises two first guiding rods arranged parallel to each other, and the two first guiding rods are fixedly connected to the cavity wall of the accommodating cavity.

[0007] Preferably, the first translation assembly includes a first frame having a first sliding connection portion and a second direction guide structure mounting portion, the first sliding connection portion is slidably connected to the two first guide rods, and the second direction guide structure mounting portion is used to install the second direction guide structure.

[0008] Preferably, the first translation assembly further includes a first driving unit, and the first driving unit is used to drive the first translation assembly to translate along the first direction.

[0009] Preferably, the first driving part includes a first bevel gear fixedly mounted on the first frame and a second bevel gear mounted in the accommodating cavity, the second bevel gear is drive-connected to the first rotating motor, and the second bevel gear is meshingly connected to the first bevel gear.

[0010] Preferably, the second direction guiding structure comprises two second guiding rods arranged parallel to each other, and the two second guiding rods are fixedly connected in the second direction guiding structure mounting portion.

[0011] Preferably, the second translation assembly comprises a second frame, the second frame has a second sliding connection portion, and the second sliding connection portion is slidably connected to the two second guide rods.

[0012] Preferably, the second translation assembly further includes a second driving portion, and the second driving portion is used for driving the second translation assembly to translate along the second direction.

[0013] Preferably, the second driving part includes a third bevel gear fixedly mounted on the second frame and a fourth bevel gear mounted in the mounting part of the second direction guide structure, the fourth bevel gear is drive-connected to the second rotating motor, and the fourth bevel gear is meshingly connected with the third bevel gear.

[0014] The present invention provides a three-degree-of-freedom rotating platform, wherein the first translation component and the base platform are slidingly connected via a first direction guiding structure, and the second translation component and the first translation component are slidingly connected via a second direction guiding structure, so that the three form an organic whole, and the mechanical structure is more compact and simple. When used, a load (which may be a sample to be tested) is placed on the upper platform of the first translation component, and multi-angle flexible dynamic control and adjustment of the load is achieved by controlling the translation or rotation of the first translation component, the second translation component and the base platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of a three-degree-of-freedom rotating platform according to an embodiment of the present invention;

[0016] Figure 2The figure is a schematic diagram of the exploded structure of a three-degree-of-freedom rotating platform according to an embodiment of the present invention.

[0017] The reference numerals are as follows:

[0018] 1. Base platform; 11. Platform body; 12. Rotating shaft; 13. Accommodating chamber; 14. First guide rod; 2. First translation assembly; 21. First frame; 211. First sliding connection; 221. First bevel gear; 222. Second bevel gear; 223. First rotating motor; 23. Second guide rod; 3. Second translation assembly; 31. Second frame; 311. Second sliding connection; 321. Third bevel gear; 322. Fourth bevel gear; 323. Second rotating motor. DETAILED DESCRIPTION

[0019] See also Figure 1 to Figure 2 As shown, according to an embodiment of the present invention, there is provided a three-degree-of-freedom rotation platform, comprising a base platform 1, a first translation component 2, and a second translation component 3. The base platform 1 can be driven to rotate, a first direction guiding structure is provided on the base platform 1, the first translation component 2 is slidably connected to the first direction guiding structure, a second direction guiding structure is provided on the first translation component 2, the second translation component 3 is slidably connected to the second direction guiding structure, and the projection of the guiding direction of the first direction guiding structure and the guiding direction of the second direction guiding structure on a plane perpendicular to the rotation axis of the base platform 1 has an angle α, 0°<α<180°. Specifically, as Figure 2 As shown, the base platform 1 rotates around the Z axis shown in the figure, and the first translation component 2 and the second translation component 3 respectively reciprocate along the X axis and the Y axis in a straight line motion, and at this time α is 90°, so that the requirements of the three-degree-of-freedom rotation platform in terms of degrees of freedom are achieved. In this technical solution, the first translation component 2 and the base platform 1 are slidably connected through a first direction guide structure, and the second translation component 3 and the first translation component 2 are slidably connected through a second direction guide structure, so that the three form an organic whole, and the mechanical structure is more compact and simple. When used, the load (which can be a sample to be tested) is placed on the upper platform of the first translation component 2, and the multi-angle flexible dynamic control and adjustment of the load is achieved by controlling the translation or rotation of the first translation component 2, the second translation component 3 and the base platform 1.

[0020] The rotation and translation of the base platform 1, the first translation component 2, and the second translation component 3 can be driven by a unified driving device or by separate driving methods, which can make the motion control of the base platform 1, the first translation component 2, and the second translation component 3 more flexible.

[0021] Preferably, the base platform 1 includes a platform body 11 and a rotating shaft 12 located at one side of the platform body 11 and coaxially arranged with the platform body 11. A receiving cavity 13 is also configured on the side of the platform body 11 away from the rotating shaft 12. The first direction guiding structure is located in the receiving cavity 13, and the first translation component 2 can translate along the first direction in the receiving cavity 13. Specifically, the rotating shaft 12 can be driven and connected with an external rotating driving component, and the provision of the receiving cavity 13 can make the overall structure of the rotating platform more compact and reduce the height of the rotating platform. In particular, the first translation component 2 is provided in the receiving cavity 13, so that the operation of the rotating platform is more reliable and stable.

[0022] The first direction guiding structure can, for example, be an optical axis guide rail slider connection structure, a screw guide rail slider connection structure, a bearing connection structure, etc. As a specific implementation of the first direction guiding structure, preferably, the first direction guiding structure includes two first guiding rods 14 arranged parallel to each other, and the two first guiding rods 14 are fixedly connected to the cavity wall of the accommodating cavity 13. It can be understood that the two first guiding rods 14 are arranged at intervals from each other in the accommodating cavity 13, so as to form a guide for the translational reciprocating motion of the first translational component 2.

[0023] The first translation assembly 2 specifically includes, for example, a first frame 21, the first frame 21 having a first sliding connection portion 211 and a second direction guide structure mounting portion, the first sliding connection portion 211 being slidably connected to the two first guide rods 14, and the second direction guide structure mounting portion being used to mount the second direction guide structure. The first sliding connection portion 211 specifically can be two hook-shaped structures extending toward the inner side of the first frame 21, the two hook-shaped structures forming a relative structure and straddling the two first guide rods 14.

[0024] The first translation assembly 2 also includes a first driving unit, which is used to drive the first translation assembly 2 to translate along the first direction. The translation drive mode of the first driving unit can be various, for example, it can be indirectly transmitted by a connecting rod mechanism, a cam, a synchronous belt, a V-belt, a gear, a lead screw, a worm gear, and various combination structures thereof, and as a preferred embodiment, preferably, the first driving unit includes a first bevel gear 221 fixedly mounted (for example, welded) on the first frame 21, and a second bevel gear 222 installed in the accommodating cavity 13, the second bevel gear 222 is drivingly connected to the first rotating motor 223, and the second bevel gear 222 is meshingly connected with the first bevel gear 221.

[0025] Based on the same technical concept, the second direction guiding structure includes two second guiding rods 23 arranged parallel to each other, and the two second guiding rods 23 are fixedly connected in the second direction guiding structure installation part.

[0026] The second translation assembly 3 includes a second frame 31 . The second frame 31 has a second sliding connection portion 311 . The second sliding connection portion 311 is slidably connected to the two second guide rods 23 .

[0027] Preferably, the second translation assembly 3 further includes a second driving unit, and the second driving unit is used to drive the second translation assembly 3 to translate along the second direction. The second driving unit can be realized by, for example, indirect transmission using a connecting rod mechanism, a cam, a synchronous belt, a V-belt, a gear, a lead screw, a worm gear, and various combination structures thereof, and as a preferred embodiment, the second driving unit includes a third bevel gear 321 fixedly mounted (for example, welded) on the second frame 31, and a fourth bevel gear 322 mounted in the mounting portion of the second direction guide structure, the fourth bevel gear 322 is drivingly connected to the second rotating motor 323, and the fourth bevel gear 322 is meshingly connected with the third bevel gear 321.

[0028] The first drive motor 223 and / or the second drive motor 323 may include a DC motor and an AC motor; the electrical connection between the motor and the power supply or controller includes but is not limited to the use of wires, slip rings and other devices; the power supply for the motor includes but is not limited to batteries, platform external power supply, wireless power supply, etc.; the first drive motor 223 and / or the second drive motor 323 preferably receives instructions from the control end through wireless communication to complete the rotational movement in a wire-free environment.

[0029] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A three-degree-of-freedom rotating platform, characterized in that: The invention comprises a base platform (1), a first translation component (2), and a second translation component (3), wherein the base platform (1) can be driven to rotate, a first direction guide structure is provided on the base platform (1), the first translation component (2) is slidably connected to the first direction guide structure, a second direction guide structure is provided on the first translation component (2), the second translation component (3) is slidably connected to the second direction guide structure, and the projections of the guiding direction of the first direction guide structure and the guiding direction of the second direction guide structure on a plane perpendicular to the rotation axis of the base platform (1) have an angle α, 0°<α<180°; the base platform (1) comprises a platform body (11) and a rotating shaft (12) located on one side of the platform body (11) and coaxially arranged with the platform body (11), and a receiving cavity (13) is further configured on a side of the platform body (11) away from the rotating shaft (12); the first direction guide structure adopts an optical axis guide rail slider connection structure, a lead screw guide rail slider connection structure or a bearing connection structure; The first translational motion component (2) comprises a first frame (21), and the first translational motion component (2) further comprises a first driving unit, the first driving unit being used to drive the first translational motion component (2) to translate along the first direction; The first driving part comprises a first bevel gear (221) fixedly mounted on the first frame (21), and a second bevel gear (222) mounted in the accommodating cavity (13); the second bevel gear (222) is drivingly connected to the first rotating motor (223), and the second bevel gear (222) is meshingly connected to the first bevel gear (221).

2. The rotating platform according to claim 1, characterized in that: The first direction guiding structure is located in the accommodating cavity (13), and the first translational motion component (2) is capable of translational motion along a first direction in the accommodating cavity (13).

3. The rotating platform according to claim 2, characterized in that: The first direction guiding structure comprises two first guiding rods (14) arranged parallel to each other, and the two first guiding rods (14) are fixedly connected to the cavity wall of the accommodating cavity (13).

4. The rotating platform according to claim 3, characterized in that: The first frame (21) comprises a first sliding connection portion (211) and a second direction guide structure mounting portion, the first sliding connection portion (211) being slidably connected to the two first guide rods (14), and the second direction guide structure mounting portion being used for mounting the second direction guide structure.

5. The rotating platform according to claim 4, characterized in that: The second direction guiding structure comprises two second guiding rods (23) arranged parallel to each other, and the two second guiding rods (23) are fixedly connected in the second direction guiding structure mounting portion.

6. The rotating platform according to claim 5, characterized in that: The second translation assembly (3) comprises a second frame (31), the second frame (31) having a second sliding connection portion (311), the second sliding connection portion (311) being slidably connected to the two second guide rods (23).

7. The rotating platform according to claim 6, characterized in that: The second translational motion component (3) further comprises a second driving part, the second driving part being used to drive the second translational motion component (3) to translate along the second direction.

8. The rotating platform according to claim 7, characterized in that: The second driving part comprises a third bevel gear (321) fixedly mounted on the second frame (31), and a fourth bevel gear (322) mounted in the mounting part of the second direction guide structure, the fourth bevel gear (322) being drive-connected to the second rotating motor (323), and the fourth bevel gear (322) being meshingly connected to the third bevel gear (321).

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