Self-lubricating slewing device and detection instrument equipped with same

Abstract

The invention relates to a self-lubricating rotation device and a detection instrument equipped with the self-lubricating rotation device, and the self-lubricating rotation device comprises an inner ring which is provided with a containing groove with an opening facing the radial outer side; the outer ring is installed on the periphery of the inner ring and provided with a boss corresponding to the containing groove, and the boss is located in the containing groove; the plurality of sliding sheets are arranged on the boss and are positioned in the accommodating groove; wherein the outer ring and the inner ring can rotate relative to each other around a common axis, and the outer ring can drive the plurality of sliding sheets to rotate relative to the inner ring together. The rotating friction force between the inner ring and the outer ring is reduced through the sliding pieces, lubricating grease is not needed any more, the maintenance workload is reduced, in addition, the structure is simple, the manufacturing cost is low, and modular design of equipment is facilitated.

Description

Technical Field

[0001] The present invention relates to the field of medical devices, and in particular to a self-lubricating rotary device and a detection instrument equipped with the self-lubricating rotary device. Background Art

[0002] In modern medical testing, particularly in automated equipment such as clinical testing, in vitro diagnostics (IVD), nucleic acid testing, and blood analysis, the orderly and repetitive switching and storage of multiple samples, reagents, or probes is often required. To achieve efficient sample management and rapid positioning, rotary devices (such as turntable sample racks and rotating probe pods) are widely used in various medical testing instruments. These devices use a rotating mechanism to sequentially deliver multiple samples or modules to the testing station, improving testing efficiency and saving space.

[0003] However, traditional rotary devices mostly use metal bearings or rolling guide structures, relying on lubricating grease to reduce friction and wear. In practical applications, this structure has the following shortcomings:

[0004] A. Frequent maintenance: Lubricants are easily affected by environmental factors such as temperature, humidity, and dust, and need to be regularly replenished or replaced, which increases the maintenance workload.

[0005] B. Contamination risk: Lubricants may evaporate or leak, contaminating samples or the testing environment, especially in situations with high cleanliness requirements (such as biomedicine and semiconductor testing).

[0006] C. Unstable operation: When lubrication is insufficient or the lubricant fails, the device may become stuck, the noise may increase, or the wear may intensify, affecting the detection accuracy and equipment life.

[0007] D. Complex structure and high cost: The traditional bearing structure is relatively complex, which increases the volume and manufacturing cost of the device and is not conducive to the lightweight and modular design of the equipment.

[0008] Therefore, there is a need for further improvement of the existing rotary device.

[0009] The information disclosed in this background section is only intended to enhance understanding of the overall background of the invention and should not be considered as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art. Summary of the Invention

[0010] The present invention aims to provide a self-lubricating rotary device and a testing instrument equipped with the same. These devices utilize sliding plates to reduce rotational friction between the inner and outer rings, eliminating the need for grease and reducing maintenance workload and costs. The device is more adaptable to applications requiring high cleanliness and avoids the seizure, increased noise, and increased wear that can occur when lubrication is insufficient or lubricant failure occurs. Furthermore, the present invention features a simple structure and low manufacturing costs, facilitating modular design of equipment.

[0011] According to a first aspect of the present invention, a self-lubricating rotating device is provided, comprising: an inner ring, which is provided with a receiving groove opening toward the radial outside; an outer ring, which is mounted on the periphery of the inner ring and is provided with a boss corresponding to the receiving groove, and the boss is located in the receiving groove; and a plurality of sliding plates, which are mounted on the boss and located in the receiving groove; wherein the outer ring and the inner ring can rotate relative to each other around a common axis, and the outer ring can drive the plurality of sliding plates to rotate relative to the inner ring.

[0012] and a plurality of lower sliding plates, each of which includes a plurality of upper sliding plates and a lower sliding plate extending downwardly from a middle portion of an inner edge of the upper sliding plate body, the upper sliding plate body being located between the upper surface of the boss and the upper surface of the accommodating groove; and a plurality of lower sliding plates, each of which includes a lower sliding plate body and a lower sliding plate extending upwardly from the middle portion of an inner edge of the lower sliding plate body, the lower sliding plate body being located between the lower surface of the boss and the lower surface of the accommodating groove; wherein the upper sliding plate bent plate and the lower sliding plate bent plate are located between the side surface of the boss and the side surface of the accommodating groove, and the plurality of lower sliding plate bent plates and the upper sliding plate bent plates are alternately spaced along the circumferential direction.

[0013] Preferably, the included angle between the upper sliding piece body and the upper sliding piece bent plate is in the range of 92° to 97°, and the included angle between the lower sliding piece body and the lower sliding piece bent plate is in the range of 92° to 97°.

[0014] Preferably, the upper surface of the outer ring is provided with at least two upper positioning holes, and the at least two upper positioning holes are evenly spaced in the circumferential direction of the outer ring, and the upper sliding plate bodies of at least two upper sliding plates are provided with upper positioning posts extending downward, and the upper positioning posts are inserted in the corresponding upper positioning holes to form at least two upper fixed sliding plates evenly spaced along the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy; the lower surface of the outer ring is provided with at least two lower positioning holes, and the at least two lower positioning holes are evenly spaced in the circumferential direction of the outer ring, and the lower sliding plate bodies of at least two lower sliding plates are provided with lower positioning posts extending upward, and the lower positioning posts are inserted in the corresponding lower positioning holes to form at least two lower fixed sliding plates evenly spaced along the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy.

[0015] Preferably, the friction coefficient of the sliding sheet is lower than 0.05.

[0016] Preferably, the sliding sheet is made of polyoxymethylene or polytetrafluoroethylene.

[0017] Preferably, the friction coefficient of the surface of the receiving groove of the inner ring is lower than 0.05, and the friction coefficient of the surface of the boss of the outer ring is lower than 0.05.

[0018] Preferably, the inner ring and the outer ring are made of 7075-T6 alloy.

[0019] Preferably, the inner ring includes an upper pressure ring and a lower pressure ring, and the outer edge of the upper half of the lower pressure ring is provided with a groove recessed radially inward. The upper pressure ring is fixed to the upper surface of the lower pressure ring by a locking screw and seals the groove to form the accommodating groove.

[0020] According to a second aspect of the present invention, a vehicle is provided, comprising: a base; a drive device mounted to the base; and the self-lubricating rotary device according to the first aspect; wherein one of the inner ring and the outer ring is fixed to the base, and the other of the inner ring and the outer ring is connected to the drive device and can rotate under the drive of the drive device.

[0021] The self-lubricating rotary device of the present invention uses a sliding plate to reduce the rotational friction between the inner ring and the outer ring, which can achieve the following effects: (1) It no longer needs to rely on lubricating grease, is not easily affected by environmental factors such as temperature, humidity, and dust, reduces maintenance workload, and thus reduces maintenance costs. (2) It no longer needs to rely on lubricating grease, avoids the lubricant from contaminating the sample and the detection environment after evaporation or leakage, and is more suitable for occasions with high cleanliness requirements. (3) It no longer needs to rely on lubricating grease, avoids the jamming, increased noise, and increased wear caused by insufficient lubrication or lubricant failure. (4) The present invention has a simple structure and low manufacturing cost, which is conducive to the modular design of the equipment.

[0022] The methods and apparatus of the present invention have other features and advantages that will be apparent from, or will be described in detail in, the accompanying drawings and subsequent embodiments incorporated herein, which together serve to explain the specific principles of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of a self-lubricating rotary device according to an embodiment of the present invention;

[0024] Figure 2 is a perspective exploded schematic diagram of a self-lubricating rotary device according to an embodiment of the present invention;

[0025] Figure 3 for Figure 1 sectional view of ;

[0026] Figure 4A for Figure 3 A partial enlarged view of point A in the middle;

[0027] Figure 4B for Figure 4A Schematic diagram of the inner circle;

[0028] Figure 4C for Figure 4A Schematic diagram of the middle and outer circles;

[0029] Figure 5A Schematic diagram of the three-dimensional structure of the upper sliding plate;

[0030] Figure 5B is a side view of the upper sliding plate;

[0031] Figure 5C Schematic diagram of the three-dimensional structure of the upper fixed sliding plate;

[0032] Figure 6A Schematic diagram of the three-dimensional structure of the lower sliding piece;

[0033] Figure 6Bis a side view of the lower sliding piece;

[0034] Figure 6C is a schematic diagram of the three-dimensional structure of the lower fixed sliding piece;

[0035] Figure 6D Schematic diagram of the distribution of the upper sliding piece and the lower sliding piece;

[0036] Figure 7A A partial diagram of the outer ring Figure 1 ;

[0037] Figure 7B A partial diagram of the outer ring Figure 2 ;

[0038] Figure 8 A schematic structural diagram of a detection instrument provided in an embodiment of the present invention.

[0039] Description of reference numerals:

[0040] 100, inner ring; 101, receiving groove; 102, upper surface; 103, lower surface; 104, side surface; 110, upper pressure ring; 111, locking screw; 120, lower pressure ring; 121, groove;

[0041] 200, outer ring; 201, boss; 202, upper surface; 203, lower surface; 204, side surface; 205, upper positioning hole; 206, lower positioning hole;

[0042] 300, sliding piece;

[0043] 310, upper sliding piece; 311, upper sliding piece body; 312, upper sliding piece bending plate; 313, upper positioning column; 310a, upper fixed sliding piece;

[0044] 320, lower sliding piece; 321, lower sliding piece body; 322, lower sliding piece bending plate; 323, lower positioning column; 320a, lower fixed sliding piece;

[0045] 400, base;

[0046] 500, driving device; 501, synchronous belt;

[0047] 601. Reaction cup base; 602. Reaction cup; 603. Detection device.

[0048] It should be understood that the accompanying drawings are not necessarily drawn to scale, but rather present simplified representations of various features to illustrate the basic principles of the invention. The specific design features disclosed in the present invention (including, for example, specific dimensions, directions, positions, and shapes) will be determined in part by the specific intended application and use environment.

[0049] In the figures, like reference numbers refer to the same or equivalent parts of the present invention throughout the several figures of the drawing. DETAILED DESCRIPTION

[0050] Reference will now be made in detail to various embodiments of the present invention, examples of which are presented in the accompanying drawings and described below. Although the present invention will be described in conjunction with the exemplary embodiments, it should be understood that this description is not intended to limit the invention to these exemplary embodiments. On the contrary, the present invention is intended to cover not only these exemplary embodiments, but also various alternative forms, modifications, equivalent forms and other embodiments that may be included within the spirit of the invention and the scope defined by the appended claims.

[0051] When an element is referred to as being “on” or “over” another element, the element may be in contact with the other element, or may be spaced apart from the other element, or intervening elements may be present between the element and the other element.

[0052] The following combination Figures 1 to 8 A self-lubricating rotary device according to an embodiment of the present invention will be described.

[0053] like Figures 1 to 4C As shown, the self-lubricating rotary device according to the embodiment of the present invention includes an inner ring 100 , an outer ring 200 and a plurality of sliding sheets 300 .

[0054] like Figure 4B As shown, the inner ring 100 is provided with a receiving groove 101 opening toward the radial outside.

[0055] The outer ring 200 is mounted on the periphery of the inner ring 100 and is provided with a boss 201 corresponding to the receiving groove 101. The boss 201 is located in the receiving groove 101 (see Figure 4A ).

[0056] A plurality of sliding sheets 300 are mounted on the boss 201 and are located in the receiving groove 101. The sliding sheets 300 are core components and play the role of lubrication and gap compensation.

[0057] The outer ring 200 and the inner ring 100 can rotate relative to each other around a common axis, and the outer ring 200 can drive the plurality of sliding sheets 300 to rotate relative to the inner ring 100 .

[0058] The present invention utilizes a sliding sheet 300 to reduce the rotational friction between the inner ring 100 and the outer ring 200, thereby achieving the following effects: (1) No longer needing to rely on lubricating grease, the device is not easily affected by environmental factors such as temperature, humidity, and dust, thereby reducing maintenance workload and, in turn, maintenance costs. (2) No longer needing to rely on lubricating grease, the lubricant is prevented from contaminating the sample and the testing environment after evaporation or leakage, making it more suitable for applications requiring high cleanliness. (3) No longer needing to rely on lubricating grease, the device avoids jamming, increased noise, and increased wear caused by insufficient lubrication or lubricant failure. (4) The present invention has a simple structure and low manufacturing cost, which is conducive to the modular design of the device.

[0059] The self-lubricating rotary device of the present invention can achieve structural expansion. Reaction cups, sample tubes, etc. can be placed on the upper part of the inner ring 100 or the outer ring 200, and reagent tanks, etc. can be arranged inside the inner ring 100, thereby realizing the automatic operation of the detection instrument.

[0060] The embodiments herein are described by taking the example of the inner ring 100 being fixed and the outer ring 200 rotating. It should be understood that the outer ring 200 may also be fixed and the inner ring 100 rotating.

[0061] In an exemplary embodiment, Figure 2 、 Figure 4A 、 Figure 4B and Figure 4C As shown, the inner ring 100 includes an upper pressure ring 110 and a lower pressure ring 120. The outer edge of the upper half of the lower pressure ring 120 is provided with a groove 121 that is recessed radially inward. The upper pressure ring 110 is fixed to the upper surface of the lower pressure ring 120 by a locking screw 111 and seals the groove 121, thereby forming the accommodating groove 101.

[0062] In an exemplary embodiment, the flatness of the mating surface of the upper pressure ring 110 in contact with the lower pressure ring 120 is less than or equal to 0.05 mm, and the flatness of the mating surface of the lower pressure ring 120 in contact with the upper pressure ring 110 is less than or equal to 0.05 mm, so as to ensure that the self-lubricating rotary device has a tight fit, thereby improving the operation accuracy.

[0063] The receiving groove 101 formed by the upper pressing ring 110 and the lower pressing ring 120 can achieve precise pressing of the sliding sheet 300, thereby ensuring the uniformity of the gap between the receiving groove 101 and the sliding sheet 300 and avoiding local jamming.

[0064] In this embodiment, the inner diameter of the inner ring 100 ranges from 300 mm to 350 mm, the resistance torque of the self-lubricating rotary device is less than 1 N·m, and the axial clearance and radial clearance are both less than or equal to 0.15 mm. When the device runs continuously for 2 million revolutions, the damping and clearance are within the required range.

[0065] In an exemplary embodiment, Figure 2 As shown, the plurality of sliding sheets 300 includes a plurality of upper sliding sheets 310 and a plurality of lower sliding sheets 320 .

[0066] like Figures 5A to 5C As shown, each upper sliding piece 310 includes an upper sliding piece body 311 and an upper sliding piece bent plate 312 extending downward from the middle of the inner edge of the upper sliding piece body 311. The upper sliding piece body 311 is located between the upper surface 202 of the boss 201 and the upper surface 102 of the receiving groove 101 (see FIG. Figures 4A to 4C The width of the upper sliding plate body 311 is greater than the width of the upper sliding plate bending plate 312. The width of the outer edge of the upper sliding plate body 311 is greater than the width of the inner edge of the upper sliding plate body 311.

[0067] like Figures 6A to 6C As shown, each lower sliding piece 320 includes a lower sliding piece body 321 and a lower sliding piece bent plate 322 extending upward from the middle of the inner edge of the lower sliding piece body 321. The lower sliding piece body 321 is located between the lower surface 203 of the boss 201 and the lower surface 103 of the receiving groove 101 (see FIG. Figures 4A to 4C The width of the lower sliding plate body 321 is greater than the width of the lower sliding plate bent plate 322. The width of the outer edge of the lower sliding plate body 321 is greater than the width of the inner edge of the lower sliding plate body 321.

[0068] The upper sliding plate bending plate 312 and the lower sliding plate bending plate 322 are located between the side surface 204 of the boss 201 and the side surface 104 of the receiving groove 101, and the plurality of lower sliding plate bending plates 322 and the upper sliding plate bending plates 312 are alternately spaced along the circumferential direction (see FIG. Figure 6D Specifically, each lower sliding sheet bending plate 322 is located in the gap between two adjacent upper sliding sheet bending plates 312 , and each upper sliding sheet bending plate 312 is located in the gap between two adjacent lower sliding sheet bending plates 322 .

[0069] In an exemplary embodiment, Figure 5B As shown, the included angle α between the upper sliding plate body 311 and the upper sliding plate bending plate 312 is in the range of 92° to 97°. Figure 6B As shown, the angle β between the lower sliding plate body 321 and the lower sliding plate bent plate 322 ranges from 92° to 97°, ensuring maximum fit between the inner ring 100 and the outer ring 200, reducing the radial gap between the inner ring 100 and the outer ring 200, and thereby improving positioning accuracy. Preferably, the angle α between the upper sliding plate body 311 and the upper sliding plate bent plate 312 is 95°, and the angle β between the lower sliding plate body 321 and the lower sliding plate bent plate 322 is also 95°.

[0070] In an exemplary embodiment, Figure 7A As shown, the upper surface of the outer ring 200 is provided with at least two upper positioning holes 205, and the at least two upper positioning holes 205 are evenly spaced in the circumferential direction of the outer ring 200 ( Figure 7A Only one upper positioning hole 205 is shown in FIG. Figure 5C As shown, the upper sliding plate body 311 of at least two upper sliding plates 310 is provided with an upper positioning column 313 extending downward, and the upper positioning column 313 is inserted into the corresponding upper positioning hole 205 to form at least two upper fixed sliding plates 310a distributed at equal intervals along the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy.

[0071] like Figure 7B As shown, the lower surface of the outer ring 200 is provided with at least two lower positioning holes 206, and the at least two lower positioning holes 206 are evenly spaced in the circumferential direction of the outer ring 200 ( Figure 7B Only one lower positioning hole 206 is shown in FIG. Figure 6C As shown, the lower sliding sheet bodies 321 of at least two lower sliding sheets 320 are provided with lower positioning columns 323 extending upward, and the lower positioning columns 323 are inserted into the corresponding lower positioning holes 206 to form at least two lower fixed sliding sheets 320a distributed at equal intervals along the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy.

[0072] The upper fixed sliding piece 310a and the lower fixed sliding piece 320a can rotate synchronously with the outer ring 200, while the other upper sliding pieces 310 and lower sliding pieces 320 can slide relative to the outer ring 200 within a relatively small range. The upper fixed sliding pieces 310a and the lower fixed sliding pieces 320a enable the outer ring 200 to drive the rotation of all sliding pieces 300, achieving orderly rotation, reducing mutual interference between the sliding pieces 300, and reducing contact wear between the sliding pieces 300 caused by high-speed rotation. In addition, the self-lubricating rotary device can ensure extremely low circular runout and high repeatability. In one specific embodiment, the upper fixed sliding pieces 310a are provided in four equal intervals along the circumference, and the lower fixed sliding pieces 320a are provided in four equal intervals along the circumference.

[0073] In an exemplary embodiment, the coefficient of friction of the sliding sheet 300 is less than 0.05.

[0074] To minimize the resistance torque of the rotary device, a sliding plate made of a special material is required to have self-lubricating properties. Preferably, the sliding plate 300 is made of polyoxymethylene (POM) or polytetrafluoroethylene (PTFE) to ensure that the sliding plate has an extremely low friction coefficient and excellent wear resistance.

[0075] In addition, the sliding sheet 300 is made of polyoxymethylene (POM) or polytetrafluoroethylene (PTFE), which has a light weight and can achieve lightweighting. Its extremely low friction coefficient enables the self-lubricating rotary device to have extremely low noise and extremely low operating damping during operation.

[0076] The self-lubricating rotary device of the present invention can effectively reduce the number of maintenance times. After a large number of experimental verifications, the accuracy and damping after running 2 million circles are no significantly different from the initial state.

[0077] Furthermore, the areas contacted by the sliding sheet 300, including the upper and lower pressing rings 110, 120, and outer ring 200, should also have low friction coefficients and wear resistance. Specifically, the surface friction coefficients of the receiving groove 101 of the inner ring 100 and the surface friction coefficients of the boss 201 of the outer ring 200 should be less than 0.05.

[0078] In this exemplary embodiment, the inner ring 100 and outer ring 200 are made of 7075-T6 alloy, which also has a low coefficient of friction and wear resistance, as well as good load-bearing capacity and machining accuracy. To further improve load-bearing capacity and machining accuracy, the 7075-T6 alloy is treated with special oxidation methods, such as micro-arc oxidation or hard anodizing.

[0079] like Figure 8 As shown, the present invention further provides a detection instrument, comprising: a base 400, a driving device 500 and the above-mentioned self-lubricating rotary device.

[0080] The driving device 500 is mounted to the base 400 .

[0081] One of the inner ring 100 and the outer ring 200 is fixed to the base 400 , and the other of the inner ring 100 and the outer ring 200 is connected to the driving device 500 and can rotate under the drive of the driving device 500 .

[0082] Specifically, in Figure 8 In the illustrated embodiment, the driving device 500 forms a transmission mechanism through a synchronous belt 501 and the outer ring 200 of the self-lubricating rotary device, thereby realizing the rotation of the outer ring 200 .

[0083] A cuvette base 601 is provided at the top of the outer ring 200 for placing a cuvette 602. After a mixture of reagents and samples is added to the cuvette 602, automatic testing can be performed, or the cuvette 602 can be transferred to another location via an automated gripper, thereby achieving fully automated operation of the testing instrument.

[0084] In an exemplary embodiment, the driving device 500 may be a motor, but the type of the driving device 500 is not limited thereto and may be any form in the prior art as long as it can achieve the above functions.

[0085] In the detection instrument, the application of the above-mentioned self-lubricating rotary device can achieve high-precision operation of the reaction cup 602, while greatly reducing costs (including manufacturing costs and maintenance costs) and operating noise.

[0086] Although in this embodiment, the driving device 500 drives the outer ring 200 to rotate relative to the inner ring 100, and drives the reaction cup 602 set on the outer ring 200 to rotate together, in other embodiments, the reaction cup 602 can also be set on the inner ring 100, and the driving device 500 can be used to drive the inner ring 100 to rotate relative to the outer ring 200 (this situation is not shown in the figure).

[0087] The detection instrument further includes a detection device 603 , which is mounted on the base 400 and is used to detect the object to be detected in the reaction cup 602 .

[0088] The operation of the self-lubricating rotary device according to the embodiment of the present invention will be described below.

[0089] The driving device 500 drives the outer ring 200 to rotate relative to the inner ring 100 around the axis of the outer ring 200 and the inner ring 100 through the synchronous belt 501, and drives the outer ring 200 to drive the multiple sliding sheets 300 to rotate relative to the inner ring 100.

[0090] During the rotation of the multiple sliding plates 300 relative to the inner ring 100, the upper fixed sliding plate 310a and the lower fixed sliding plate 320a rotate synchronously with the outer ring 200, while the other upper sliding plates 310 and lower sliding plates 320 ensure orderly rotation, reduce mutual interference between the sliding plates 300, and reduce contact wear between the sliding plates 300 caused by high-speed rotation. In addition, the self-lubricating rotary device can ensure extremely small circular runout and high repeatability.

[0091] For convenience of explanation and precise definition of the appended claims, the terms "upper", "lower", "inner", "outer", "above", "below", "upper", "lower", "upward", "downward", "front", "back", "behind", "inside", "outside", "inward", "outward", "inner", "exterior", "inner", "external", "forward", and "backward" are used to describe the features of the exemplary embodiments with reference to the positions of such features as shown in the accompanying drawings.

[0092] The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. The foregoing descriptions are not intended to be exhaustive or to limit the invention to the precise forms disclosed, and it is apparent that many variations and modifications are possible in light of the foregoing teachings. The exemplary embodiments have been selected and described to illustrate the specific principles of the invention and their practical application, thereby enabling others skilled in the art to make and utilize the various exemplary embodiments of the invention and their various alternatives and modifications. The scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A self-lubricating rotary device, characterized in that: include: an inner ring, which is provided with a receiving groove opening toward the radial outside; an outer ring, which is mounted on the periphery of the inner ring and is provided with a boss corresponding to the receiving groove, and the boss is located in the receiving groove; as well as a plurality of sliding sheets mounted on the boss and located in the receiving groove; The outer ring and the inner ring can rotate relative to each other around a common axis, and the outer ring can drive the plurality of sliding sheets to rotate relative to the inner ring.

2. The self-lubricating rotary device according to claim 1, characterized in that: The plurality of sliding sheets include: a plurality of upper sliding pieces, each of the upper sliding pieces comprising an upper sliding piece body and an upper sliding piece bent plate extending downward from a middle portion of an inner edge of the upper sliding piece body, the upper sliding piece body being located between an upper surface of the boss and an upper surface of the receiving groove; and a plurality of lower sliding pieces, each of the lower sliding pieces comprising a lower sliding piece body and a lower sliding piece bent plate extending upward from a middle portion of an inner edge of the lower sliding piece body, the lower sliding piece body being located between a lower surface of the boss and a lower surface of the receiving groove; The upper sliding piece bent plate and the lower sliding piece bent plate are located between the side surface of the boss and the side surface of the accommodating groove, and a plurality of lower sliding piece bent plates and upper sliding piece bent plates are alternately distributed along the circumferential direction.

3. The self-lubricating rotary device according to claim 2, characterized in that: The included angle between the upper sliding piece body and the upper sliding piece bent plate is in the range of 92° to 97°, and the included angle between the lower sliding piece body and the lower sliding piece bent plate is in the range of 92° to 97°.

4. The self-lubricating rotary device according to claim 2, characterized in that: At least two upper positioning holes are provided on the upper surface of the outer ring, and the at least two upper positioning holes are evenly spaced in the circumferential direction of the outer ring. The upper sliding plate bodies of the at least two upper sliding plates are provided with downwardly extending upper positioning posts, and the upper positioning posts are inserted into the corresponding upper positioning holes to form at least two upper fixed sliding plates evenly spaced in the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy; The lower surface of the outer ring is provided with at least two lower positioning holes, and the at least two lower positioning holes are evenly spaced in the circumferential direction of the outer ring. The lower sliding plate bodies of at least two lower sliding plates are provided with lower positioning columns extending upward, and the lower positioning columns are inserted into the corresponding lower positioning holes to form at least two lower fixed sliding plates evenly spaced along the circumferential direction, thereby reducing circular runout and improving repeated positioning accuracy.

5. The self-lubricating rotary device according to claim 1, characterized in that: The friction coefficient of the sliding sheet is lower than 0.

05.

6. The self-lubricating rotary device according to claim 1, characterized in that: The sliding sheet is made of polyoxymethylene or polytetrafluoroethylene.

7. The self-lubricating rotary device according to claim 1, characterized in that: The friction coefficient of the surface of the receiving groove of the inner ring is lower than 0.05, and the friction coefficient of the surface of the boss of the outer ring is lower than 0.

05.

8. The self-lubricating rotary device according to claim 1, characterized in that: The inner ring and the outer ring are made of 7075-T6 alloy.

9. The self-lubricating rotary device according to claim 1, characterized in that: The inner ring includes an upper pressure ring and a lower pressure ring. The outer edge of the upper half of the lower pressure ring is provided with a groove recessed radially inward. The upper pressure ring is fixed to the upper surface of the lower pressure ring by a locking screw and blocks the groove to form the accommodating groove.

10. A detection instrument, characterized in that: include; base; a drive device mounted to the base; and The self-lubricating rotary device according to any one of claims 1 to 9; Wherein, one of the inner ring and the outer ring is fixed to the base, and the other of the inner ring and the outer ring is connected to the driving device and can rotate under the driving of the driving device.

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