A stiffness continuously adjustable mechanical superstructure based on aluminum alloy internal and external gear train

Abstract

The application discloses a kind of stiffness continuously adjustable mechanical superstructure based on aluminum alloy inner and outer gear train, it is characterized in that including bearing platform, support, connecting shaft, planet wheel, sun gear, planet carrier and inner and outer tooth ring gear;The inner and outer tooth ring gear outer ring has gear teeth, for driving meshing ring gear and planet wheel, changes planet wheel meshing position, beneficial effect is to realize the continuous smooth adjustment of stiffness physical property, structure conception is ingenious, movement is stable, stiffness adjustment range is big, both can fill relevant technical blank, can also generate greater social and economic benefits.

Description

Technical Field

[0001] This invention relates to the field of gear dynamics technology, and in particular to a mechanical superstructure with continuously adjustable stiffness based on an aluminum alloy internal and external gear system. Background Technology

[0002] With the rapid development of the times, structures such as bridges, ships, and industrial machinery operate in complex environments for extended periods. The main structure and various equipment generate dynamic loads, leading to problems such as structural vibration, fatigue, noise, buckling, and fracture. However, the use of traditional materials is no longer sufficient to meet the increasingly demanding requirements of comprehensive engineering. While most current mechanical metamaterials can adjust their stiffness, the adjustment range is limited, and the adjustment process is abrupt, not allowing for continuous and smooth performance adjustment. Compared to other mechanical metamaterials, gear-based metamaterials offer the advantage of continuously adjustable stiffness physical properties, demonstrating great application potential in various engineering applications. Summary of the Invention

[0003] This invention provides a continuously adjustable stiffness mechanical superstructure based on an aluminum alloy internal and external gear system, to overcome the shortcomings of existing mechanical metamaterial design technologies such as small stiffness adjustment range, few stable states, and discontinuous control. To achieve the above objective, this invention provides a continuously adjustable stiffness mechanical superstructure based on an aluminum alloy internal and external gear system, characterized by comprising a load-bearing platform, a support, a connecting shaft, planetary gears, a sun gear, a planet carrier, and internal and external gear rings; the internal and external gear rings have teeth on both their inner and outer sides, driving the meshing internal and external gear rings and planetary gears. The internal and external gear rings, planetary gears, sun gear, and planet carrier are combined to form an internal and external gear system; the sun gear in the internal and external gear system is fixed to the connecting shaft and does not rotate; the internal and external gear system is the base for forming a gear array; the connecting shaft is installed in the central hole of the sun gear, and the gear array is connected to the support through the connecting shaft; The load-bearing platform has four forms: rectangular, cross-shaped, heart-shaped, and arc-shaped. The support has four forms: grid-shaped, cross-shaped, V-shaped, and concave-shaped. The rectangular load-bearing platform and grid-shaped support, together with the gear array, constitute a rectangular mechanical superstructure; the cross-shaped load-bearing platform and cross-shaped support, together with the gear array, constitute a cross-shaped mechanical superstructure; the heart-shaped load-bearing platform and V-shaped support, together with the gear array, constitute a heart-shaped mechanical superstructure; and the arc-shaped load-bearing platform and concave-shaped support, together with the gear array, constitute an arc-shaped mechanical superstructure. Square columns are uniformly arranged on each inner surface of the rectangular bearing platform, the cross-shaped bearing platform and the arc-shaped bearing platform. The ends of the square columns are arc-shaped and concave, a protruding key is arranged in the middle of the arc, and the key is matched with a key groove on the outer circle of the thick-walled metal ring, which is used to fix the bearing platform; 5 rows and 3 columns of square columns are uniformly arranged on four inner surfaces of the rectangular bearing platform; each inner surface of the cross-shaped bearing platform is provided with 5 rows and 1 column of square columns; the arc-shaped bearing platform consists of two short planes, one long plane and a combined plane, the combined plane consists of an arc-shaped plane and two small planes symmetrically distributed at two ends of the arc-shaped plane, the two short planes are arranged in parallel, the long plane and the combined plane are arranged oppositely, 2 rows and 4 columns of square columns are uniformly distributed on the short planes, 2 rows and 5 columns of square columns are uniformly distributed on the long plane, in the combined plane, 2 rows and 1 column of square columns are respectively distributed on the two small planes, and 2 rows and 3 columns of square columns are arranged in the arc-shaped plane; the heart-shaped bearing platform is heart-shaped in appearance, connecting columns are arranged on the inner side surface and are cross-shaped, the other end of the connecting columns is connected with a V-shaped bracket as a whole, and the heart-shaped bearing platform and the V-shaped bracket are integrated through the connecting columns; The stiffness of the #-shaped bracket, cross-shaped bracket, V-shaped bracket and concave-shaped bracket is all smaller than the minimum stiffness formed by gear meshing; the bracket is an elastic bracket, which is composed of a thick-walled metal ring and a thin metal arc-shaped plate, and two ends of the thin metal arc-shaped plate are connected to the thick-walled metal ring; For the #-shaped bracket, except for the thick-walled metal ring at the middle position, other thick-walled metal rings are provided with key grooves, two key grooves are arranged on the thick-waled metal rings at four corners, one key groove is arranged on the other thick-walled metal rings, and the key grooves face outward for matching with the keys at the ends of the square columns; for the cross-shaped bracket, except for the thick-walled metal ring at the middle position, three key grooves are arranged on the other thick-walled metal rings, and the key grooves face outward; no key groove is arranged on the thick-walled metal ring of the V-shaped bracket, and the thick-walled metal ring is connected as a whole with the connecting columns on the inner side of the heart-shaped bearing platform; for the concave-shaped bracket, except for three thick-walled metal rings at the middle position, key grooves are arranged on other thick-walled metal rings, two key grooves are arranged on the thick-walled metal rings at four corners, one key groove is arranged on the other thick-walled metal rings, and the key grooves face outward; The rectangular mechanical superstructure, cross-shaped mechanical superstructure and heart-shaped mechanical superstructure all adopt 4-layer gear arrays, and the arc-shaped mechanical superstructure adopts a single-layer gear array; The stiffness continuously adjustable mechanical superstructure based on an aluminum alloy internal and external gear train is integrally made of aluminum alloy. External load is applied to the bearing platform and transmitted to the internal and external gear train, so that the inner and outer gear rings deform, the deformation amount is adjusted by changing the meshing position of planetary gears, and the smooth adjustment of the stiffness of the internal and external gear train is realized; The adjustment states of traditional topological metamaterials are limited, and stiffness can only be adjusted in a stepped manner, which cannot achieve continuous and smooth adjustment. Compared with traditional topological metamaterials, the beneficial effect of the present invention is that gear teeth are provided on the outer ring of the inner and outer gear ring to drive the next inner and outer gear train, so that the planet gears in the entire inner and outer gear train change the meshing position, the adjustment state can be freely controlled, so that the stiffness physical property can be continuously adjusted. The structure is ingeniously conceived, the movement is stable, and the stiffness adjustment range is large. Description of Drawings

[0004] Figure 1 is a stiffness continuously adjustable mechanical metastructure with aluminum alloy inner and outer gear trains for a rectangular bearing platform; Figure 2 is a three-dimensional view of a rectangular bearing platform; Figure 3 is a three-dimensional view of a "field"-shaped bracket; Figure 4 is a stiffness continuously adjustable mechanical metastructure with aluminum alloy inner and outer gear trains for a "cross"-shaped bearing platform; Figure 5 is a three-dimensional view of a "cross"-shaped bearing platform; Figure 6 is a three-dimensional view of a "cross"-shaped bracket; Figure 7 is a stiffness continuously adjustable mechanical metastructure with aluminum alloy inner and outer gear trains for a heart-shaped bearing platform; Figure 8 is a three-dimensional view of a heart-shaped bearing platform and a "V"-shaped bracket; Figure 9 is a stiffness continuously adjustable mechanical metastructure with aluminum alloy inner and outer gear trains for an arc-shaped bearing platform; Figure 10 is a three-dimensional view of an arc-shaped bearing platform; Figure 11 is a three-dimensional view of a "concave"-shaped bracket; Figure 12 is a characteristic diagram of the stiffness continuously adjustable mechanical metastructure with aluminum alloy inner and outer gear trains for a rectangular bearing platform.

[0005] 1. inner and outer gear ring 2. sun gear 3. planet carrier 4. planet gear 5. rectangular bearing platform 6. connecting shaft 7. "field"-shaped bracket 8. "cross"-shaped bearing platform 9. "cross"-shaped bracket 10. heart-shaped bearing platform 11. "V"-shaped bracket 12. arc-shaped bearing platform 13. "concave"-shaped bracket. Detailed Description of Embodiments

[0006] Embodiments of the present invention are described with reference to the accompanying drawings, and in conjunction with Figure 1 — Figure 12 Detailed description will be given to specific embodiments of the present invention. Example

[0007] As shown in Figure 1 , the stiffness continuously adjustable mechanical metastructure made of aluminum alloy internal-external gear train on a rectangular bearing platform comprises an internal-external gear ring 1, a sun gear 2, a planet carrier 3, a planet gear 4, a rectangular bearing platform 5, a connecting shaft 6 and a "field-shaped" bracket 7. Gear teeth are provided on both inner and outer sides of the internal-external gear ring 1, for driving the internal-external gear ring 1 and the planet gear 4 meshed therewith. The internal-external gear ring 1, the sun gear 2, the planet carrier 3 and the planet gear 4 are combined to form an internal-external gear train; the sun gear 2 in the internal-external gear train is fixed to the connecting shaft 6 and does not rotate; the internal-external gear train is a matrix constituting a gear array; the connecting shaft is installed in a center hole of the sun gear 2, and the gear array is connected with the "field-shaped" bracket 7 through the connecting shaft 6; the rectangular bearing platform 5, the "field-shaped" bracket 7 and the gear array together form the stiffness continuously adjustable mechanical metastructure made of aluminum alloy internal-external gear train on the rectangular bearing platform.

[0008] The stiffness continuously adjustable mechanical metastructure made of aluminum alloy internal-external gear train on the rectangular bearing platform all adopts 4 layers of gear arrays, as shown in Figure 2 , square columns are uniformly arranged on each inner surface of the rectangular bearing platform 5, the end of each square column is arc-shaped and concave, a protruding key is arranged in the middle of the arc, the key matches with a key groove on an outer circle of a thick-walled metal ring, and is used for fixing the rectangular bearing platform 5; 5 rows and 3 columns of square columns are uniformly arranged on four inner surfaces of the rectangular bearing platform 5; the stiffness of the "field-shaped" bracket 7 is smaller than the minimum stiffness formed by gear meshing; as shown in Figure 3 , the "field-shaped" bracket 7 is an elastic bracket composed of thick-walled metal rings and arc-shaped thin metal plates, two ends of each arc-shaped thin metal plate are connected to the thick-walled metal rings; except for the middle thick-walled metal ring, the other thick-walled metal rings of the "field-shaped" bracket 7 are provided with key grooves, two key grooves are arranged on the thick-walled metal rings at four corners, one key groove is arranged on the other thick-walled metal rings, and the key grooves face outward for matching with the keys at the ends of the square columns. Example

[0009] As shown in Figure 4The "+" shaped support platform aluminum alloy internal and external gear system shown is a continuously adjustable mechanical superstructure, including internal and external gear rings 1, a sun gear 2, a planet carrier 3, planet gears 4, a connecting shaft 6, a "+" shaped support platform 8, and a "+" shaped bracket 9. The internal and external gear rings 1 have teeth on both their inner and outer sides, driving the meshing internal and external gear rings 1 and planet gears 4. The internal and external gear rings 1, sun gear 2, planets 3 and 4 combine to form the internal and external gear system; the sun gear 2 in the internal and external gear system is fixed to the connecting shaft 6 and does not rotate; the internal and external gear system is the base for forming the gear array; the connecting shaft is installed in the central hole of the sun gear 2, and the gear array is connected to the "+" shaped bracket 9 through the connecting shaft 6.

[0010] The cross-shaped support platform 8 and the cross-shaped bracket 9 together with the gear array constitute a cross-shaped aluminum alloy internal and external gear system with continuously adjustable stiffness mechanical superstructure.

[0011] The stiffness-adjustable mechanical superstructure of the aluminum alloy internal and external gear system of the "+" shaped load-bearing platform adopts a 4-layer gear array, such as... Figure 5 As shown, square columns are evenly arranged on each inner surface of the cross-shaped support platform 8. The ends of the square columns are arc-shaped and concave, and there is a protruding key in the middle of the arc. The key cooperates with the outer keyway of the metal thick-walled ring. Each inner surface of the cross-shaped support platform 8 has 5 rows and 1 column of square columns.

[0012] The stiffness of the cross-shaped bracket 9 is less than the minimum stiffness formed by gear meshing; such as Figure 6 As shown, the cross-shaped support 9 is an elastic support, which is composed of a thick metal ring and a thin metal arc plate. The two ends of the thin metal arc plate are connected to the thick metal ring. Except for the middle thick metal ring, the other thick metal rings of the cross-shaped support 9 have three keyways, with the keyways facing outward.

[0013] Example 3 like Figure 7 The heart-shaped support platform aluminum alloy internal and external gear system shown is a continuously adjustable mechanical superstructure, including internal and external gear rings 1, a sun gear 2, a planet carrier 3, planet gears 4, a connecting shaft 6, a heart-shaped support platform 10, and a "V"-shaped bracket 11. The internal and external gear rings 1 have teeth on both their inner and outer sides, driving the internal and external gear rings 1 and planet gears 4 that mesh with them. The internal and external gear rings 1, sun gear 2, planets 3 and 4 combine to form the internal and external gear system; the sun gear 2 in the internal and external gear system is fixed to the connecting shaft 6 and does not rotate; the internal and external gear system is the base for forming the gear array; the connecting shaft is installed in the central hole of the sun gear 2, and the gear array is connected to the "V"-shaped bracket 11 through the connecting shaft 6.

[0014] The heart-shaped load-bearing platform's aluminum alloy internal and external gear systems, with continuously adjustable stiffness, both employ a four-layer gear array. The heart-shaped load-bearing platform 10 and the "V"-shaped support 11, together with the gear array, constitute the heart-shaped mechanical superstructure. Figure 8 As shown, the heart-shaped support platform 10 is heart-shaped in shape, with connecting columns arranged on the inner side in a cross shape. The other end of the connecting column is connected to the V-shaped bracket 11 as a whole. Through the connecting column, the heart-shaped support platform 10 and the V-shaped bracket 11 are integrated.

[0015] The stiffness of the "V"-shaped bracket 11 is less than the minimum stiffness formed by gear meshing; the "V"-shaped bracket is an elastic bracket, which is composed of a thick-walled metal ring and a thin arc-shaped metal plate, with both ends of the thin arc-shaped metal plate connected to the thick-walled metal ring; the thick-walled metal ring of the "V"-shaped bracket 11 has no keyway, and the thick-walled metal ring is connected to the connecting column inside the heart-shaped bearing platform 10 to form a whole. Example

[0016] like Figure 9 The rectangular load-bearing platform aluminum alloy internal and external gear system shown is a continuously adjustable mechanical superstructure, including internal and external gear rings 1, a sun gear 2, a planet carrier 3, planet gears 4, an arc-shaped load-bearing platform 12, a connecting shaft 6, and a U-shaped support 13. The internal and external gear rings 1 have teeth on both their inner and outer sides, driving the meshing internal and external gear rings 1 and planet gears 4. The internal and external gear rings 1, sun gear 2, planets 3 and 4 combine to form the internal and external gear system; the sun gear 2 in the internal and external gear system is fixed to the connecting shaft 6 and does not rotate; the internal and external gear system is the base for forming the gear array; the connecting shaft is installed in the central hole of the sun gear 2, and the gear array is connected to the U-shaped support 13 through the connecting shaft 6; the arc-shaped load-bearing platform 12 and the U-shaped support 13, together with the gear array, constitute the continuously adjustable mechanical superstructure of the arc-shaped aluminum alloy internal and external gear system.

[0017] The continuously adjustable stiffness mechanical superstructure of the aluminum alloy internal and external gear system of the arc-shaped load-bearing platform adopts a single-layer gear array, such as... Figure 10 As shown, square columns are evenly arranged on each inner surface of the arc-shaped bearing platform 12. The ends of the square columns are arc-shaped and concave, and there is a protruding key in the middle of the arc. The key cooperates with the outer circular keyway of the metal thick-walled ring to fix the arc-shaped bearing platform 12. The arc-shaped bearing platform 12 consists of two shorter planes, one longer plane, and one combined plane. The combined plane consists of the arc-shaped plane and two smaller planes symmetrically distributed at both ends of the arc-shaped plane. The two shorter planes are arranged in parallel, and the longer plane and the combined plane are arranged opposite each other. The shorter plane is evenly distributed with 2 rows and 4 columns of square columns, and the longer plane is evenly distributed with 2 rows and 5 columns of square columns. In the combined plane, the two smaller planes are each distributed with 2 rows and 1 column of square columns. In the arc-shaped plane, 2 rows and 3 columns of square columns are arranged.

[0018] The stiffness of the U-shaped bracket 13 is less than the minimum stiffness formed by gear meshing; such as Figure 11 As shown, the U-shaped bracket 13 is an elastic bracket, consisting of a thick-walled metal ring and a thin arc-shaped metal plate. The two ends of the thin arc-shaped metal plate are connected to the thick-walled metal ring. Except for the three thick-walled metal rings in the middle, the other thick-walled metal rings of the U-shaped bracket 13 have keyways. The four corner thick-walled metal rings are arranged with two keyways, and the other thick-walled metal rings have one keyway, with the keyways facing outward.

[0019] Figure 12 The diagram shows the characteristics of a continuously adjustable mechanical superstructure based on the aluminum alloy internal and external gear system of a rectangular load-bearing platform. As the internal and external gear rings rotate, the stiffness of the continuously adjustable mechanical superstructure based on the aluminum alloy internal and external gear system changes continuously and smoothly.

[0020] The aforementioned stiffness-continuously adjustable mechanical superstructure based on an aluminum alloy internal and external gear system is made of aluminum alloy. External loads are applied to the bearing platform and transmitted to the internal and external gear systems, causing deformation of the internal and external gear rings. By changing the meshing position of the planetary gears, the amount of deformation can be adjusted to achieve smooth adjustment of the stiffness of the internal and external gear systems.

[0021] The above description is merely a preferred embodiment of the invention and does not constitute any limitation on the invention. Any modifications, alterations, or equivalent changes made to the above embodiments based on the essence of the invention shall still fall within the protection scope of the invention.

Claims

1. A mechanical superstructure with continuously adjustable stiffness based on an aluminum alloy internal and external gear system, characterized in that... It comprises a bearing platform, a bracket, a connecting shaft, a planet gear, a sun gear, a planet carrier, and an inner-outer gear ring; the inner-outer gear ring has gear teeth on both inner and outer sides, to drive the inner-outer gear ring and the planet gear meshed therewith; The inner-outer gear ring, the planet gear, the sun gear and the planet carrier are combined to form an inner-outer gear train; the sun gear in the inner-outer gear train is fixed to the connecting shaft and does not rotate; the inner-outer gear train serves as a base body forming a gear array; the connecting shaft is installed in a central hole of the sun gear, and the gear array is connected to the bracket via the connecting shaft; The bearing platform has four forms, which are a rectangular bearing platform, a cross-shaped bearing platform, a heart-shaped bearing platform and an arc-shaped bearing platform; the bracket has four forms, which are a grid-shaped (Chinese character "tian") bracket, a cross-shaped (Chinese character "shi") bracket, a V-shaped bracket and a concave-shaped (Chinese character "ao") bracket; the rectangular bearing platform, the grid-shaped bracket and the gear array together form a rectangular mechanical superstructure; the cross-shaped bearing platform, the cross-shaped bracket and the gear array together form a cross-shaped mechanical superstructure; the heart-shaped bearing platform, the V-shaped bracket and the gear array together form a heart-shaped mechanical superstructure; the arc-shaped bearing platform, the concave-shaped bracket and the gear array together form an arc-shaped mechanical superstructure; On each inner surface of the rectangular bearing platform, the cross-shaped bearing platform and the arc-shaped bearing platform, square columns are uniformly arranged, the end of each square column is arc-shaped and concave inward, a protruding key is arranged in the middle of the arc, and the key matches with a key groove on the outer circumference of a thick-walled metal ring, for fixing the bearing platform; on the four inner surfaces of the rectangular bearing platform, square columns in 5 rows and 3 columns are uniformly arranged; on each inner surface of the cross-shaped bearing platform, square columns in 5 rows and 1 column are arranged; the arc-shaped bearing platform consists of two short planes, one long plane and one combined plane, the combined plane consists of an arc plane and two small planes symmetrically distributed at two ends of the arc plane, the two short planes are arranged in parallel, the long plane and the combined plane are arranged opposite to each other, the short planes are uniformly provided with square columns in 2 rows and 4 columns, the long plane is uniformly provided with square columns in 2 rows and 5 columns, in the combined plane, the two small planes are respectively provided with square columns in 2 rows and 1 column, and in the arc plane, square columns in 2 rows and 3 columns are arranged; the heart-shaped bearing platform is heart-shaped in appearance, connecting columns are arranged on the inner side surface in a cross intersection arrangement, the other end of the connecting columns is connected with the V-shaped bracket as a whole, and the heart-shaped bearing platform and the V-shaped bracket are integrated via the connecting columns; The stiffness of the grid-shaped bracket, the cross-shaped bracket, the V-shaped bracket and the concave-shaped bracket is all lower than the minimum stiffness formed by gear meshing; the bracket is an elastic bracket, which consists of a thick-walled metal ring and a thin arc-shaped metal plate, two ends of the thin arc-shaped metal plate are connected to the thick-walled metal ring; Except for the middle thick-walled metal circular ring, the other thick-walled metal circular rings of the "tic-tac-toe" shaped support are provided with key grooves; two key grooves are arranged on the thick-walled metal circular rings at the four corners, and one key groove is arranged on the other thick-walled metal circular rings, with the key grooves facing outward for fitting with the keys at the end of the square columns; for the "cross" shaped support, except for the middle thick-walled metal circular ring, the other thick-walled metal circular rings are provided with three key grooves, with the key grooves facing outward; no key groove is arranged on the thick-walled metal circular ring of the "V" shaped support, and the thick-walled metal circular ring is connected integrally with the connecting post on the inner side of the heart-shaped bearing platform; for the "concave" shaped support, except for the three middle thick-walled metal circular rings, the other thick-walled metal circular rings are provided with key grooves; two key grooves are arranged on the thick-walled metal circular rings at the four corners, and one key groove is arranged on the other thick-walled metal circular rings, with the key grooves facing outward; The rectangular mechanical metastructure, the "cross" shaped mechanical metastructure and the heart-shaped mechanical metastructure all adopt 4-layer gear arrays, and the arc-shaped mechanical metastructure adopts a single-layer gear array; The stiffness continuously adjustable mechanical metastructure based on aluminum alloy internal and external gear trains is made of aluminum alloy as a whole. An external load is applied to the bearing platform and transmitted to the internal and external gear trains, so that the inner and outer gear rings deform. The deformation amount is adjusted by changing the meshing position of the planet gears, so as to realize the smooth adjustment of the stiffness of the internal and external gear trains.

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