Rigidity-adjustable bearing platform

Abstract

The invention provides a rigidity-adjustable bearing platform, which can realize multi-gear adjustability of bearing rigidity, can adjust the inherent frequency of the whole load after being connected with the load, and belongs to the related technical fields of mechanical engineering, aerospace, constructional engineering and the like. According to the platform, a plurality of parallel flexible supporting paths are arranged between a mounting surface and a bearing surface, and different supporting rigidities of the platform are achieved by locking and releasing the flexible supporting paths. The principle is simple and reliable, the structural form is flexible and changeable, and the supporting rigidity is not affected by environmental factors.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of mechanical engineering, aerospace and civil engineering, etc. In particular, it relates to a stiffness-adjustable bearing platform. BACKGROUND

[0002] In the field of mechanical engineering, aerospace and civil engineering, etc., resonance can cause equipment vibration to intensify, resulting in phenomena such as increased vibration amplitude, structural damage and component loosening and falling off. In design, the natural frequency of the equipment needs to be avoided from the excitation frequency of the vibration source, but as the complexity of the equipment increases, the natural frequency becomes more abundant. When the excitation frequency of the vibration source cannot be completely avoided through design, a flexible tooling can be considered to be connected in series on the equipment installation path to adjust the overall natural frequency of the equipment. At this time, although the flexible tooling can be connected in series on the equipment installation path to adjust the overall natural frequency, the existing flexible tooling has the inherent defect of fixed stiffness — once the measured object is replaced, the tooling often needs to be replaced simultaneously, which not only increases the operation cost but also greatly prolongs the debugging period. Therefore, there is an urgent need to develop a stiffness-adjustable bearing platform that meets the stiffness requirements of different equipment. SUMMARY

[0003] In order to solve the above technical problems, a stiffness-adjustable bearing platform is invented. The specific technical solution is as follows:

[0004] A stiffness-adjustable bearing platform, comprising: a platform mounting surface, a bearing surface, and a plurality of parallel flexible support paths between the platform mounting surface and the bearing surface, and the different support stiffnesses of the platform are realized by locking and releasing each flexible support path.

[0005] Advantages of the present application:

[0006] 1) Simple and reliable principle, support stiffness is not affected by environmental factors;

[0007] 2) Flexible structure, stiffness adjustment can be manual or automatic; BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 The figure is a perspective view of the present application.

[0009] Figure 2 The figure is a cross-sectional view of the present application.

[0010] Figure 3 The figure is a schematic diagram of multiple support stiffnesses of the present application. DETAILED DESCRIPTION

[0011] In order to make the purpose, technical solution and advantages of the present application clearer and more explicit, the following will further explain the present application in combination with specific embodiments and with reference to the drawings.

[0012] AsFigure 1 As shown, the present invention provides a stiffness-adjustable bearing platform, including: a platform mounting surface 1, a bearing surface 2, and multiple parallel flexible support paths 3 and multiple connecting screws 4 located between the platform mounting surface and the bearing surface, and different bearing stiffnesses of the platform are achieved by locking and releasing each flexible support path.

[0013] The platform mounting surface 1 is a rectangular metal plate with a certain thickness, and mounting holes are provided at its four corners;

[0014] The bearing surface 2 is also a rectangular metal plate with a certain thickness, and its upper surface is provided with an array of mounting holes for mounting loads.

[0015] like Figure 2 The diagram shown is a schematic of the flexible support path 3 of the present invention. Figure 2 (a) is Figure 2 (b) sectional view, Figure 2 (b) is a top view. The flexible support path can be achieved through the deformation of the thin-walled metal structure. The flexible support path 3 includes three parallel flexible paths: left, middle, and right. The left and right flexible paths have the same structure and are symmetrically positioned. The specific structure of the left and right flexible paths is as follows: each is composed of two flexible bridges, which have the same structure and are symmetrically positioned. One end of each flexible bridge is connected to the platform mounting surface 1, and the other end is connected to the bearing surface 2. Screw holes are set in the middle of the flexible bridges to connect them. The two flexible bridges form an X shape after connection. The specific structure of the flexible support path in the middle position is as follows: it includes two flexible bridges, one upper and one lower. Both upper and lower flexible bridges are trapezoidal and symmetrically positioned. The two inclined sides of the upper flexible bridge are connected to the bearing surface 2. The two inclined sides and the long side of the upper flexible bridge are integral thin-walled structures. The two inclined sides of the lower flexible bridge are connected to the platform mounting surface 1. The two inclined sides and the long side of the lower flexible bridge are also integral thin-walled structures. The long sides of the upper and lower flexible bridges are set opposite each other, and screw holes are set in the middle of the long sides to connect them.

[0016] The thin-walled structure is integrated with the platform mounting surface 1 and the load-bearing surface 2, and is processed by wire cutting.

[0017] Flexible support path 3 can also be achieved through the elastic deformation of non-metallic materials such as rubber, depending on the usage environment and damping requirements.

[0018] like Figure 3 As shown, the locking and releasing of each flexible support path can be manually operated using screw fastening or automatically operated using an electric mechanism. The connection stiffness of the left and right flexible paths can be controlled by whether or not screws are connected, while the path opening and closing of the middle flexible path can be controlled by whether or not screws are connected. This allows for four connection stiffness levels. All screws can be connected, such as... Figure 3 (a); Only connect the left and right 4 screws, such as Figure 3in (b); only connect the middle two screws, such as Figure 3 in (c); do not connect any screws, such as Figure 3 in (d).

[0019] such as Figure 1 As shown, three parallel flexible support paths are set by means of the shape deformation of a thin-walled metal structure between the platform installation surface and the bearing surface, and the locking and release of each flexible support path are realized through screw connection to achieve four different support stiffnesses of the platform. The flexible support path can be realized by the shape deformation of a thin-walled metal structure or by the elastic deformation of non-metallic materials such as rubber, depending on the use environment and damping requirements. The locking and release of each flexible support path can be manually operated by means of screw fastening or automatically operated by means of an electric mechanism. The bearing platform of the present invention can achieve multi-stage adjustable support stiffness and can adjust the overall natural frequency of the load after being connected to the load.

[0020] Parts not elaborated in the present invention belong to the well-known technologies in the art.

Claims

1. A stiffness-adjustable load-bearing platform, characterized in that: include: The platform has an mounting surface, a bearing surface, and multiple parallel flexible support paths located between the mounting surface and the bearing surface. Different support stiffnesses of the platform are achieved by locking and releasing each flexible support path.

2. The adjustable stiffness load-bearing platform according to claim 1, characterized in that: The platform mounting surface is a rectangular metal plate with a certain thickness, and mounting holes are provided at its four corners.

3. The adjustable stiffness load-bearing platform according to claim 1, characterized in that: The bearing surface is a rectangular metal plate with a certain thickness, and its upper surface is provided with an array of mounting holes for mounting loads.

4. The adjustable stiffness load-bearing platform according to claim 1, characterized in that: The flexible support path is achieved through the deformation of the thin-walled metal structure.

5. The adjustable stiffness load-bearing platform according to claim 4, characterized in that: The flexible support path includes three parallel flexible paths: left, middle, and right. The left and right flexible paths have the same structure and are symmetrically positioned.

6. The adjustable stiffness load-bearing platform according to claim 5, characterized in that: The specific structure of the two flexible paths on the left and right is as follows: each is composed of two flexible bridges on the left and right. The two flexible bridges have the same structure and are symmetrical in position. One end of each flexible bridge is connected to the platform mounting surface, and the other end is connected to the bearing surface. Screw holes are set in the middle of the flexible bridges to realize the connection between them. The two flexible bridges form an X shape after being connected.

7. The adjustable stiffness load-bearing platform according to claim 5, characterized in that: The specific structure of the flexible support path in the middle position is as follows: it includes two flexible bridges, one upper and one lower. Both upper and lower flexible bridges are trapezoidal and symmetrically positioned. The two inclined sides of the upper flexible bridge are connected to the bearing surface. The two inclined sides and the long side of the upper flexible bridge are integral thin-walled structures. The two inclined sides of the lower flexible bridge are connected to the platform mounting surface. The two inclined sides and the long side of the lower flexible bridge are also integral thin-walled structures. The long sides of the upper and lower flexible bridges are arranged opposite each other, and a screw hole is provided in the middle of the long side to realize the connection between the two.

8. A stiffness-adjustable load-bearing platform according to any one of claims 4-7, characterized in that: The thin-walled structure is integrated with the platform mounting surface and load-bearing surface, and is processed by wire cutting.

9. The adjustable stiffness load-bearing platform according to claim 1, characterized in that: The flexible support path is achieved through the elastic deformation of non-metallic materials, including rubber.

10. The adjustable stiffness load-bearing platform according to claim 1, characterized in that: The connection stiffness of the two flexible paths on the left and right is controlled by whether or not they are connected with screws, while the connection of the flexible path in the middle is controlled by whether or not it is connected with screws, thus achieving four connection stiffness levels.

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