A rolling frame for a high-g three-degree-of-freedom centrifuge

Abstract

The present invention relates to the field of centrifuge structure, and specifically discloses a roll frame for a high-g value three-degree-of-freedom centrifuge, comprising a frame, wherein the frame is an octagonal annular cavity surrounded by an outer skin outer ring, an inner skin inner ring and a cover plate; the frame is symmetrically provided with two roll axis mounting holes, wherein a small shaft sleeve is provided in the roll axis mounting hole, and the side wall of the frame perpendicular to the line connecting the two roll axis mounting holes is provided with two pitch axis mounting holes, wherein a large shaft sleeve is provided in the pitch axis mounting hole; and a plurality of threading tubes are provided in the cavity between the outer skin and the inner skin. The advantages of the present invention are that the roll frame's outer shape structure, box cross-sectional structure, local structure and wiring method are improved and designed to improve the roll frame's overload resistance, rigidity and load-bearing capacity, and reduce the eccentricity of the roll frame, so that it can be used in a high-g value three-degree-of-freedom centrifuge.

Description

Technical Field

[0001] The invention relates to the field of centrifuge structures, in particular to a rolling frame for a high-g value three-degree-of-freedom centrifuge. Background Art

[0002] The three-degree-of-freedom centrifuge consists of a rotating arm, a roll frame, a roll motor, a pitch frame, a pitch motor, a transmission unit, a main drive motor, and an instrument cabin. The three-degree-of-freedom centrifuge is an important test equipment that uses the rotation of the rotating arm, the roll motion of the roll frame, and the pitch motion of the pitch frame to achieve three-degree-of-freedom coordinated motion to simulate the acceleration and jerk environment. It can be used for product testing and basic research in related fields such as aviation, aerospace, navigation, weapons, and medical treatment.

[0003] Among them, the roll frame connects the rotating arm and the pitch frame. It is the key load-bearing component of the three-degree-of-freedom centrifuge. In addition to bearing the maximum centrifugal load generated by the structure itself, the pitch motor, the pitch frame and the test piece, it also needs to withstand the torsional torque generated by the roll motor and the pitch motor. The stress is harsh and the working conditions are complex.

[0004] According to the investigation, the roll frame has been maturely applied in low-g three-degree-of-freedom / four-degree-of-freedom centrifuges, such as on three-axis turntables (a large-load internal hollow high-precision three-axis horizontal turntable, application number: 201711131877.4; a three-axis turntable frame axis system device, application number: 201621308961.X), three-axis manned centrifuges and helicopter dynamic flight simulators (three-degree-of-freedom roll frame system for helicopter dynamic flight simulators, application number: 201811044735.9) and other equipment.

[0005] The disadvantages of traditional technology are:

[0006] (1) The overload resistance is not strong and the stiffness is not high;

[0007] (2) Limited carrying capacity;

[0008] (3) The balance requirements are not high.

[0009] The reasons for the above shortcomings are:

[0010] The traditional rolling frame is used in a gravity field or a low-g acceleration field. It does not need to bear too much centrifugal load generated by itself and the load, and the requirements for overload resistance design, stiffness design and load-bearing capacity design are not high.

[0011] In addition, the roll motor drives the roll frame to rotate. The eccentricity of the roll frame will cause the roll motor to bear additional eccentric torque. When the roll frame is used in a gravity field or a low-g acceleration field, the eccentric torque is often negligible relative to the driving torque. However, when the roll frame is used in a high-g acceleration field, the eccentric torque generated by the eccentricity will become the main factor affecting the motor torque design.

[0012] Therefore, traditional rolling frames cannot be used on high-g three-degree-of-freedom centrifuges. Summary of the invention

[0013] The purpose of the present invention is to overcome the shortcomings of the prior art that it cannot meet the high-g value use environment, and to provide a rolling frame for a high-g value three-degree-of-freedom centrifuge, which is symmetrically arranged front and back, left and right, and up and down, and can effectively avoid the centrifugal load caused by eccentricity.

[0014] The object of the present invention is achieved by the following technical scheme: a rolling frame for a high-g value three-degree-of-freedom centrifuge, comprising a frame, wherein the frame is an octagonal annular cavity surrounded by an outer skin outer ring, an inner skin inner ring and a cover plate; two rolling axis mounting holes are symmetrically arranged on the frame, and a small shaft sleeve is arranged in the rolling axis mounting hole; two pitch axis mounting holes are arranged on the side wall of the frame perpendicular to the line connecting the two rolling axis mounting holes, and a large shaft sleeve is arranged in the pitch axis mounting hole;

[0015] A plurality of threading tubes are arranged in the cavity between the outer skin and the inner skin.

[0016] Specifically, a plurality of fixing ribs are vertically arranged between the outer skin and the inner skin, and mounting holes are arranged on the fixing ribs, and the threading tube passes through the mounting holes.

[0017] Specifically, a partition is horizontally arranged in the cavity between the outer skin and the inner skin to divide the cavity into two even layers, the multiple threading tubes are symmetrically arranged in the upper and lower layers of the cavity, the outer skin is provided with threading holes, one end of the threading tube is connected to the threading hole, and the other end thereof is connected to the small sleeve.

[0018] Specifically, the corners of the inner and outer octagons of the frame are rounded.

[0019] Specifically, the large shaft sleeve has a stepped cylindrical structure. A plurality of first large shaft sleeve rib plates, second large shaft sleeve rib plates, and third large shaft sleeve rib plates are radially arranged on the outside of the large shaft sleeve. There are four first large shaft sleeve rib plates, and they are symmetrically arranged in pairs; two second large shaft sleeve rib plates are arranged between each pair of first large shaft sleeve rib plates, and a plurality of third large shaft sleeve rib plates are evenly arranged between the second large shaft sleeve rib plates; a plurality of through holes are arranged on the third large shaft sleeve rib plates, and through holes are arranged on the first large shaft sleeve rib plates. The heights of the first large shaft sleeve rib plates, second large shaft sleeve rib plates, and third large shaft sleeve rib plates decrease in sequence.

[0020] Specifically, the small shaft sleeve has a stepped cylindrical structure. Four first small shaft sleeve rib plates are radially arranged on the outside of the small shaft sleeve, and they are symmetrically arranged in pairs; a plurality of second small shaft sleeve rib plates are evenly arranged between each pair of first small shaft sleeve rib plates, and through holes are arranged on the first small shaft sleeve rib plates.

[0021] Specifically, the first small shaft sleeve rib plate is an arc-shaped plate, and the height of the second small shaft sleeve rib plate is less than that of the first small shaft sleeve rib plate.

[0022] Specifically, a plurality of clamps are arranged on the outer skin on both sides of the pitch axis mounting hole.

[0023] Specifically, a wire tying bracket is arranged inside the small shaft sleeve.

[0024] Specifically, an inner skin reinforcement plate is arranged on the inner side of the inner skin, and a cover plate reinforcement plate is arranged at the bottom of the cover plate.

[0025] The present invention has the following advantages:

[0026] 1. By improving the design of the shape structure of the roll frame, the cross-section structure of the box body, the local structure, and the wiring method, the anti-overload capacity, stiffness, and load-bearing capacity of the roll frame are improved, and the eccentricity of the roll frame is reduced, enabling it to be used on a high-g three-degree-of-freedom centrifuge.

[0027] 2. The roll frame adopts a symmetrical structure to ensure that the intersection point of the roll axis and the pitch axis coincides with the theoretical centroid of the roll frame, reducing the eccentric moment borne by the roll motor;

[0028] 3. The roll frame adopts a "day"-shaped cross-section structure with good comprehensive mechanical properties of tension, compression, bending, and torsion, enabling the roll frame to adapt to harsh and complex usage conditions;

[0029] 4. The corner areas of the inner and outer rings of the roll frame adopt large fillet structures to improve the stress conditions of this key load-bearing part;

[0030] 5. The rolling frame adopts a structure in which a reinforcement plate is partially attached inside, which can effectively improve the local rigidity and strength of the rolling frame and ensure the integrity of the appearance of the rolling frame;

[0031] 6. Both the large and small sleeves of the rolling frame adopt a stepped cylindrical structure with radial reinforcement to improve the torsional rigidity of the moment-bearing part;

[0032] 7. Eight-way wire ducts are symmetrically arranged inside the rolling frame. This layout not only ensures the isolation of strong and weak current wiring of the system, but also makes the appearance of the rolling frame beautiful and neat. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the large shaft sleeve of the present invention;

[0035] Figure 3 It is a structural schematic diagram of the small shaft sleeve of the present invention;

[0036] Figure 4 It is a structural schematic diagram of the frame cross section of the present invention;

[0037] Figure 5 It is a structural schematic diagram of the cover plate reinforcement plate of the present invention;

[0038] Figure 6 It is a schematic structural diagram of the inner skin reinforcement plate of the present invention;

[0039] In the figure: 1-cover plate, 2-inner skin, 3-outer skin, 4-large shaft sleeve, 41-first large shaft sleeve rib plate, 42-second large shaft sleeve rib plate, 43-third large shaft sleeve rib plate, 44-through hole, 45-through hole, 5-small shaft sleeve, 51-first small shaft sleeve rib plate, 52-second small shaft sleeve rib plate, 53-through hole, 6-pitch axis mounting hole, 7-roll axis mounting hole, 8-threading tube, 9-fixed rib plate, 10-partition plate, 11-threading hole, 12-clamp, 13-wire binding bracket, 14-mounting hole, 16-inner skin reinforcement plate, 17-cover plate reinforcement plate. DETAILED DESCRIPTION

[0040] The present invention is further described below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the following description.

[0041] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0042] like Figures 1 to 6 As shown, a rolling frame for a high-g value three-degree-of-freedom centrifuge includes a frame, wherein the frame is an octagonal annular cavity surrounded by an outer ring of an outer skin 3, an inner ring of an inner skin 2 and a cover plate 1; the rolling frame is formed by welding with high-strength structural steel plates, and two rolling axis mounting holes 7 are symmetrically arranged on the frame, and a small shaft sleeve 5 is arranged in the rolling axis mounting hole 7, and two pitch axis mounting holes 6 are symmetrically arranged on the side wall of the frame perpendicular to the line connecting the two rolling axis mounting holes 7, and a large shaft sleeve 4 is arranged in the pitch axis mounting hole 6; the rolling frame of the present invention is used in a high-g value acceleration field, and does not need to bear too much centrifugal load generated by itself and the load. When the rolling frame is used in a gravity field or a low-g value acceleration field, the eccentric moment It can often be ignored relative to the driving torque, but when the roll frame is used in a high-g acceleration field, the eccentric torque generated by eccentricity will become the main factor affecting the motor torque design. Therefore, the roll frame of the present invention adopts an octagonal structure. Structurally, the roll frame is symmetrically arranged front to back and left to right, that is, the roll frame is symmetrical on both sides along the axis of the two pitch axis mounting holes 6, and is symmetrical on both sides along the axis of the roll axis mounting hole 7. The axis of the pitch axis mounting hole 6 is perpendicular to the axis of the roll axis mounting hole 7. At the same time, the roll frame is symmetrically arranged up and down. When in use, the roll axis is installed in the small shaft sleeve 5, and the pitch axis is installed in the large shaft sleeve 4. This ensures that the intersection of the roll axis and the pitch axis coincides with the theoretical center of mass of the roll frame, solving the problem of eccentricity.

[0043] A plurality of threading tubes 8 are arranged in the cavity between the outer skin 3 and the inner skin 2, a plurality of fixed ribs 9 are arranged vertically between the outer skin 3 and the inner skin 2, a mounting hole 14 is arranged on the fixed ribs 9, the threading tube 8 passes through the mounting hole 14, a partition 10 is arranged horizontally in the cavity between the outer skin 3 and the inner skin 2 to divide the cavity and the fixed ribs 9 into two uniform layers, the plurality of threading tubes 8 are symmetrically arranged in the upper and lower layers of the cavity, eight threading tubes 8 are arranged, two threading tubes 8 are arranged between adjacent small sleeves 5 and large sleeves 4, and the two threading tubes 8 are respectively arranged in the upper and lower layers of the cavity to ensure the symmetry of the rolling frame. This layout method not only ensures the strong and weak current of the system The isolated wiring makes the appearance of the rolling frame beautiful and tidy; the outer skin 3 is provided with a threading hole 11, one end of the threading tube 8 is connected to the threading hole 11, and the other end thereof is connected to the small shaft sleeve 5, and a partition 10 is horizontally arranged between the outer skin 3 and the inner skin 2 to divide the cavity into uniform upper and lower cavities, so that the cross-section of the rolling frame forms a "sun"-shaped cross-section, and at the same time, a plurality of fixed ribs 9 are vertically arranged in the cavity, and the two ends of the fixed ribs 9 are respectively fixed on the outer skin 3 and the inner skin 2, and the height of the fixed ribs 9 is equal to the depth of the cavity. The use of this structure can enhance the tensile, compressive, bending and torsional properties of the frame, and can work stably and is not easily damaged in a high-g acceleration field environment; a plurality of through holes are arranged on the fixed ribs 9.

[0044] Furthermore, the inner and outer octagonal corners of the frame are chamfered. Since the present invention is an octagonal structure that is symmetrical left and right and front and back, the chamfers of the rolling frame mainly have three different designs, and are preferably designed to be R490, R490 and R350.

[0045] like Figure 2As shown, the large shaft sleeve 4 is a stepped cylindrical structure. The stepped cylindrical structure can improve the torsional rigidity of the torque-bearing part. The large shaft sleeve 4 is radially provided with a plurality of first large shaft sleeve ribs 41, second large shaft sleeve ribs 42 and third large shaft sleeve ribs 43 on the outside; four first large shaft sleeve ribs 41 are provided, and are symmetrically arranged in groups of two, and two second large shaft sleeve ribs 42 are arranged between the first large shaft sleeve ribs 41 of each group, and a plurality of third large shaft sleeve ribs 43 are evenly arranged between the second large shaft sleeve ribs 42; a plurality of through holes 45 are provided on the third large shaft sleeve ribs 43, and the first large shaft sleeve ribs 41 are provided with a plurality of through holes 45. A through hole 44 is provided on the plate 41, and the heights of the first large shaft sleeve rib plate 41, the second large shaft sleeve rib plate 42, and the third large shaft sleeve rib plate 43 decrease successively; the first large shaft sleeve rib plate 41, the second large shaft sleeve rib plate 42, and the third large shaft sleeve rib plate 43 are provided on the large shaft sleeve 4, which can not only enhance the torsional rigidity of the large shaft sleeve 4, but also the length thereof is the same as the distance between the inner skin 2 and the outer skin 3, which is equivalent to adding reinforcing ribs locally between the inner skin 2 and the outer skin 3, thereby enhancing the local mechanical properties of the frame located outside the pitch axis mounting hole 6. Since the areas around the pitch axis mounting hole 6 are the main load-bearing points, the working reliability of the frame is improved.

[0046] Furthermore, the small shaft sleeve 5 is a stepped cylindrical structure. The stepped cylindrical structure can improve the torsional stiffness of the torque-bearing part. Four first small shaft sleeve ribs 51 are radially arranged on the outside of the small shaft sleeve 5, and are symmetrically arranged in groups of two. A plurality of second small shaft sleeve ribs 52 are evenly arranged between the first small shaft sleeve ribs 51 of each group. A through hole 53 is arranged on the first small shaft sleeve ribs 51. The function of the ribs arranged on the small shaft sleeve 5 is the same as that of the ribs arranged on the large shaft sleeve 4, which will not be repeated here.

[0047] Furthermore, the first small shaft sleeve reinforcement plate 51 is an arc-shaped plate, and the height of the second small shaft sleeve reinforcement plate 52 is smaller than that of the first small shaft sleeve reinforcement plate 51 .

[0048] Furthermore, a plurality of clamps 12 are provided on the outer skin 3 on both sides of the pitch axis mounting hole 6, and a wire binding bracket 13 is provided on the small sleeve 5. The cable is passed through the wire threading hole 11 into the wire threading tube 8. The clamp 12 provided on the outer skin 3 can fix the cable on the outer skin 3, and the other end of the cable is fixed on the wire binding bracket 13.

[0049] Furthermore, an inner skin reinforcement plate 16 is provided on the inner side of the inner skin 2. The inner skin reinforcement plate 16 is mainly provided at the corners of the inner skin 2. An inner skin reinforcement plate 16 is provided at each corner, thereby effectively enhancing the local stiffness and strength at the corners; a cover plate reinforcement plate 17 is provided at the bottom of the cover plate 1. Similarly, the cover plate reinforcement plate 17 is also provided at the corners of the cover plate 1, thereby effectively enhancing the stiffness and strength at the corners of the cover plate 1.

[0050] The fixed rib plate 9, the partition plate 10, the step of the large shaft sleeve 4, the inner skin reinforcement plate 16, and the cover reinforcement plate of the present invention are provided with weight-reducing holes for reducing the weight of the frame. At the same time, a through hole 53 is provided on the first small shaft sleeve rib plate 51, a through hole 44 is provided on the first large shaft sleeve rib plate 41, and the through hole provided on the step of the large shaft sleeve 4 is also provided for weight reduction.

[0051] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above-mentioned technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A rolling frame for a high-g three-degree-of-freedom centrifuge, characterized in that: The invention comprises a frame, wherein the frame is an octagonal annular cavity formed by an outer ring of an outer skin (3), an inner ring of an inner skin (2) and a cover plate (1); two roll axis mounting holes (7) are symmetrically arranged on the frame, a small shaft sleeve (5) is arranged in the roll axis mounting hole (7); two pitch axis mounting holes (6) are symmetrically arranged on a side wall of the frame perpendicular to a line connecting the two roll axis mounting holes (7), a large shaft sleeve (4) is arranged in the pitch axis mounting hole (6); A plurality of threading tubes (8) are arranged in the cavity between the outer skin (3) and the inner skin (2); A plurality of fixing ribs (9) are vertically arranged between the outer skin (3) and the inner skin (2), and mounting holes (14) are arranged on the fixing ribs (9), and the threading tube (8) passes through the mounting holes (14); A partition (10) is horizontally arranged in the cavity between the outer skin (3) and the inner skin (2) to divide the cavity and the fixed rib plate (9) into two evenly spaced layers, the plurality of threading tubes (8) are symmetrically arranged in the two layers of the cavity, the outer skin (3) is provided with a threading hole (11), one end of the threading tube (8) is connected to the threading hole (11), and the other end thereof is connected to the small shaft sleeve (5); The large shaft sleeve (4) is a stepped cylindrical structure, and a plurality of first large shaft sleeve ribs (41), second large shaft sleeve ribs (42), and third large shaft sleeve ribs (43) are radially arranged on the outside of the large shaft sleeve (4); four first large shaft sleeve ribs (41) are arranged, and are symmetrically arranged in groups of two; two second large shaft sleeve ribs (42) are arranged between the first large shaft sleeve ribs (41) of each group, and a plurality of third large shaft sleeve ribs (43) are evenly arranged between the second large shaft sleeve ribs (42); a plurality of through holes (45) are arranged on the third large shaft sleeve ribs (43), and a through hole (44) is arranged on the first large shaft sleeve ribs (41); the heights of the first large shaft sleeve ribs (41), the second large shaft sleeve ribs (42), and the third large shaft sleeve ribs (43) decrease in sequence.

2. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 1, characterized in that: The corners of the inner and outer octagons of the frame are rounded.

3. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 1, characterized in that: The small shaft sleeve (5) is a stepped cylindrical structure, and four first small shaft sleeve ribs (51) are radially arranged on the outside of the small shaft sleeve (5), and are symmetrically arranged in groups of two; a plurality of second small shaft sleeve ribs (52) are evenly arranged between the first small shaft sleeve ribs (51) of each group, and a through hole (53) is arranged on the first small shaft sleeve ribs (51).

4. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 3, characterized in that: The first small shaft sleeve reinforcement plate (51) is an arc-shaped plate, and the height of the second small shaft sleeve reinforcement plate (52) is smaller than that of the first small shaft sleeve reinforcement plate (51).

5. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 1, characterized in that: A plurality of clamps (12) are provided on the outer skin (3) on both sides of the pitch axis mounting hole (6).

6. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 1, characterized in that: A wire binding bracket (13) is provided on the small shaft sleeve (5).

7. A rolling frame for a high-g three-degree-of-freedom centrifuge according to claim 1, characterized in that: An inner skin reinforcement plate (16) is provided on the inner side of the inner skin (2), and a cover plate reinforcement plate (17) is provided on the bottom of the cover plate (1).

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