Buffer connecting device and parameter calculation method therefor

Abstract

The present invention relates to the technical field of equipment vibration damping, and in particular, to a buffer connecting device and a parameter calculation method therefor. The buffer connecting device comprises: a bolt comprising a screw shank and a bolt head, the screw shank sequentially passing through a first member and a second member; and a force transmission block disposed between the bolt head and the first member, the force transmission block being configured to enable the central axis of a first through hole of the first member to substantially coincide with the central axis of the bolt head.

Description

Buffer connection device and its parameter calculation method

[0001] Cross-reference to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411393912.X, entitled "A Connecting Buffer Structure", filed on October 8, 2024, and Chinese Patent Application No. 202411393911.5, entitled "Parameter Calculation Method for Connecting Structure and Connecting Structure", filed on October 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention belongs to the field of equipment vibration reduction technology, specifically, it relates to a buffer connection device and a method for calculating the parameters of the buffer connection device. Background Technology

[0004] In a system connecting two contacting components, anchor bolts serve as the primary means of connection, such as the connection between two steel plates. While anchor bolts are the main connection point between the two components, they are also often weak points. Under external forces, anchor bolts are frequently sheared or deformed, which can seriously endanger the safety of the components and requires serious attention.

[0005] In a two-plate connection system, in order to ensure that the anchor bolts can bear the horizontal load of the two plates evenly, through holes or threaded holes are often evenly arranged around the perimeter of the two plates, and the anchor bolts are placed in these through holes or threaded holes to achieve the function of connection and fixation.

[0006] There is a small gap between the anchor bolts and the through holes in the steel plate. After installation, this gap can cause the anchor bolts, which were originally regularly distributed (i.e., the axis of the anchor bolt coincides with the center line of the through hole or threaded hole), to become irregularly distributed, resulting in uneven stress distribution and causing excessive stress on some anchor bolts. Secondly, due to manufacturing tolerances, installation deviations, or both, the center line of the through hole or threaded hole in the steel plate may not coincide with the axis of the anchor bolt, which also causes uneven stress on the anchor bolts. Furthermore, when the connection system of the two steel plates is subjected to external impact, there may be uneven stress on some anchor bolts. The strength of the anchor bolts themselves is insufficient to resist the impact or compression of uneven forces, resulting in frequent instances of anchor bolts breaking due to excessive stress.

[0007] Currently, common measures for cushioning anchor bolts, such as adding an elastic body between the anchor bolt and the steel plate, only provide axial vibration reduction, but have almost no effect on tangential vibration reduction. Furthermore, since the tangential force exerted on the anchor bolt by the two steel plates is much greater than the axial force, the above measures are of little significance in reducing the risk of anchor bolt breakage.

[0008] Therefore, there is an urgent need to develop a buffer connection device that can better reduce the risk of anchor bolt breakage. Summary of the Invention

[0009] To address at least one of the technical problems described above, the present invention proposes a buffer connection device and a method for calculating the parameters of the buffer connection device.

[0010] According to the present invention, a buffer connection device is provided for connecting at least a first component and a second component, the buffer connection device comprising:

[0011] A bolt, comprising a shank and a head, the shank passing through a first through hole in a first member and extending at least into a second member to connect the first member and the second member together;

[0012] A force transmission block is disposed between the screw head and the first component, the force transmission block being configured to keep the central axis of the first through hole of the first component substantially coincident with the central axis of the screw head.

[0013] In one specific embodiment, the force transmission block is adapted to the first component via an inclined surface, and the force transmission block is configured to be subjected to a preload force toward the first component, such that the force transmission block can pass through the inclined surface under the action of the preload force to keep the central axis of the first through hole of the first component substantially coincident with the central axis of the screw head.

[0014] In one specific embodiment, a buffer body for providing the preload force is provided between the force transmission block and the screw head.

[0015] In one specific embodiment, the buffer body is constructed as at least one of a helical spring, a disc spring, and an elastomer.

[0016] In one specific embodiment, the buffer body includes at least one disc spring element coaxially arranged, the disc spring element including a disc spring body for bearing vertical force, and a guide ring coaxially arranged in the disc spring body for adapting to the screw.

[0017] In one specific embodiment, the thickness of the guide ring is less than the thickness of the disc spring body.

[0018] In one specific embodiment, a guide tube is provided on the outside of the buffer body to prevent the buffer body from being overloaded.

[0019] In one specific embodiment, a gasket is provided between the buffer body and the screw head, the first end of the guide cylinder is connected to the gasket, and the second end of the guide cylinder is in contact with the first component.

[0020] In one specific embodiment, the force transmission block is constructed in any one of the following shapes: frustum, prismatic, or spherical, thereby forming the inclined surface.

[0021] In one specific embodiment, the inclination angle of the inclined plane is 10° to 60°.

[0022] In one specific embodiment, the buffer body is configured to have a vertical stiffness K. V The vertical stiffness K V K is derived from the following formula: V =F V / S2,

[0023] Among them, F V S1 is the vertical reaction force of the buffer body; S2 is the vertical reaction force of the buffer body at F V Vertical compressive displacement under the action of ,

[0024] The vertical reaction force F V The following formula is used to derive: F V =α(F H1 -μ1P),

[0025] Where: α is the force transmission coefficient of the buffer body; F H1 The external stress applied to the first component; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components.

[0026] The vertical compression displacement S2 is obtained by the following formula: S2 = S1 tanθ,

[0027] Where: S1 is the horizontal sliding displacement of the first component under the external stress; and θ is the inclination angle of the inclined plane.

[0028] The external stress F H1 The following formula is used to derive:

[0029] In one specific embodiment, the buffer connection device is configured to have an initial stiffness K1, which is obtained by the following formula:

[0030] in:

[0031] μ1 is the coefficient of sliding friction between the first component and the second component;

[0032] P is the vertical external force between the first component and the second component; and

[0033] S0 is the horizontal sliding displacement of the first component when it begins to slide against static friction.

[0034] In one specific embodiment, the buffer connection device is configured to have a post-buck stiffness K2, which is obtained by the following formula:

[0035] or,

[0036] Where: α is the force transmission coefficient of the buffer body; S1 is the external stress F of the first component. H1 The horizontal sliding displacement under the action of F, at which point S1 is greater than S0; H1 The external stress is μ1; the sliding friction coefficient between the first component and the second component is μ1; and the vertical external force between the first component and the second component is P.

[0037] In one specific embodiment, the force transmission coefficient α of the buffer body is obtained by the following formula:

[0038] Wherein, μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; μ3 is the coefficient of sliding friction between the bolt and the force transmission block; and θ is the inclination angle of the inclined surface.

[0039] In one specific embodiment, the bolt is configured to have a horizontal reaction force F H2 The horizontal reaction force F H2 The following formula is used to derive: F H2 =β(F H1 -μ1P),

[0040] Wherein: F H2 β is the horizontal reaction force of the bolt; β is the force transmission coefficient of the bolt; F H1 denoted as external stress; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components.

[0041] In one specific embodiment, the force transmission coefficient β of the bolt is obtained by the following formula:

[0042] Where: μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; θ is the inclination angle of the inclined surface.

[0043] According to the present invention, a method for calculating the parameters of a buffer connection device is also provided, wherein the vertical stiffness K of the buffer body is... V K is derived from the following formula: V =F V / S2,

[0044] Among them, F V S1 is the vertical reaction force of the buffer body; S2 is the vertical reaction force of the buffer body at F V Vertical compressive displacement under the action of;

[0045] The vertical reaction force F V The following formula is used to derive: F V =α(F H1 -μ1P),

[0046] Where: α is the force transmission coefficient of the buffer body; F H1 The external stress applied to the first component; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components.

[0047] The vertical compression displacement S2 is obtained by the following formula: S2 = S1 tanθ,

[0048] Wherein: S1 is the horizontal sliding displacement of the first component under the external stress; and θ is the inclination angle of the inclined plane;

[0049] The external stress F H1 The following formula is used to derive:

[0050] In one specific embodiment, the initial stiffness K1 of the buffer connection device is obtained by the following formula:

[0051] in:

[0052] μ1 is the coefficient of sliding friction between the first component and the second component;

[0053] P is the vertical external force between the first component and the second component; and

[0054] S0 is the horizontal sliding displacement of the first component when it begins to slide against static friction, and

[0055] The post-buck stiffness K2 of the buffer connection device is obtained by the following formula:

[0056] or,

[0057] Where: α is the force transmission coefficient of the buffer body; S1 is the external stress F of the first component. H1 The horizontal sliding displacement under the action of F, at which point S1 is greater than S0; H1 The external stress is μ1; the sliding friction coefficient between the first component and the second component is μ1; and the vertical external force between the first component and the second component is P.

[0058] In one specific embodiment, the force transmission coefficient α of the buffer body is obtained by the following formula:

[0059] Wherein, μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; μ3 is the coefficient of sliding friction between the bolt and the force transmission block; and θ is the inclination angle of the inclined surface.

[0060] In one specific embodiment, the horizontal reaction force F of the bolt H2 The following formula is used to derive: F H2 =β(F H1 -μ1P),

[0061] Wherein: F H2 β is the horizontal reaction force of the bolt; β is the force transmission coefficient of the bolt; F H1 The external stress is μ1; the sliding friction coefficient between the first and second components is μ1; and the vertical external force between the first and second components is P.

[0062] The force transmission coefficient β of the bolt is obtained by the following formula:

[0063] Where: μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; θ is the inclination angle of the inclined surface.

[0064] Compared with the prior art, this application has at least the following advantages.

[0065] The device according to the invention includes a buffer body and a force transmission block, wherein a first member can slide horizontally within a certain range on a second member and is closely connected with the vertical deformation of the buffer body to form a hysteresis curve with post-buckling stiffness. The force transmission block and the first member are in contact with each other through an inclined plane, which can convert the horizontal displacement of the first member relative to the second member into the vertical deformation of the buffer body, thereby reducing the risk of the bolt being sheared by the first member and the second member. The buffer body can apply a preload force toward the first member to the force transmission block, so that the force transmission block, under the action of the preload force, can pass through the inclined plane to keep the central axis of the first through hole of the first member substantially coincident with the central axis of the bolt head, thereby avoiding direct contact between the first member and the side of the bolt and preventing the bolt from being sheared.

[0066] According to the present invention, by setting different tilt angles for the inclined surface between the force transmission block and the first component, the stiffness of the buffer connection device can be optimized, thereby converting the vertical stiffness of the buffer connection device into the horizontal stiffness between the first component and the second component.

[0067] The buffer connection device provided by the present invention closely links the horizontal energy dissipation hysteresis curve and the vertical energy dissipation hysteresis curve of the structure after the first component and the second component are fixed together through the force transmission block, forming the superimposed hysteresis curve generated by the overall energy dissipation of the buffer structure, and the constitutive relationship of the hysteresis curve is similar to the bilinear model.

[0068] The horizontal force on the first component is connected to the vertical force on the buffer body by the force transmission block. The first component overcomes the friction between itself and the second component and slides horizontally, and pushes the force transmission block to slide vertically, thereby compressing the buffer body to generate vertical compressive displacement. Therefore, the first component, the force transmission block, and the buffer body are connected into an integrated energy dissipation system by the second component and the bolt, realizing horizontal and vertical sliding. The initial stiffness, post-buck stiffness, and equivalent stiffness generated by the horizontal sliding of the first component are connected with the vertical compressive stiffness of the buffer body and the inclination angle of the inclined surface of the force transmission block, which facilitates the structural optimization design of the force transmission block.

[0069] According to the method of the present invention, the magnitudes of the force transmission coefficients α and β are changed by adjusting the inclination angle of the inclined surface of the force transmission block, thereby altering the magnitudes of both the vertical reaction force of the buffer body and the horizontal reaction force of the bolt. The horizontal reaction force of the bolt and the vertical reaction force of the buffer body are negatively correlated with the inclination angle of the inclined surface of the force transmission block. When the horizontal reaction force of the bolt is small, the inclination angle of the inclined surface of the force transmission block is small, and the vertical reaction force of the buffer body is large. Furthermore, the vertical compressive displacement of the buffer body and the horizontal sliding displacement of the first component are tangent to the inclination angle of the inclined surface of the force transmission block. When the horizontal sliding displacement of the first component remains constant, setting a force transmission block with a smaller inclination angle results in a smaller vertical compressive displacement of the buffer body. Therefore, by setting a force transmission block with a smaller inclination angle, it is advantageous to obtain a buffer body with a smaller vertical compressive displacement and a larger vertical reaction force, i.e., a buffer body with greater vertical stiffness, which better meets design requirements and is beneficial for buffer connection devices with a smaller overall height.

[0070] According to the present invention, a guide ring is added to the center of the buffer body, and the guide ring and the disc spring body are designed as an irregular disc spring. The disc spring body plays a vertical compression role, while the guide ring only plays an auxiliary guiding role.

[0071] According to the method of the present invention, the guide cylinder of the buffer body and the gasket on its top are structurally optimized and the gasket and the guide cylinder are integrated into a single structure. The bottom of the guide cylinder maintains a vertical gap with the first component. This vertical gap is equal to the pre-compression displacement of the buffer body. After the buffer body is pre-compressed, the guide cylinder and the first component are tightly fitted together, which can prevent the buffer body from generating an off-center load after vertical compression, causing the bolt to undergo large bending deformation and avoiding the bolt from losing its vertical guiding function. Attached Figure Description

[0072] The present invention will now be described with reference to the accompanying drawings.

[0073] Figure 1 schematically shows a schematic diagram of an embodiment of the buffer connection device according to the present invention;

[0074] Figure 2 schematically shows a diagram of the first component according to the present invention;

[0075] Figure 3 schematically shows a buffer body of the buffer connection device according to the present invention comprising multiple disc springs;

[0076] Figure 4 schematically shows a partially enlarged view of Figure 3;

[0077] Figure 5 schematically shows a schematic diagram of an embodiment of the disc spring according to the present invention;

[0078] Figure 6 schematically shows a three-dimensional structural diagram of an embodiment of the disc spring according to the present invention;

[0079] Figure 7 schematically shows a diagram of an embodiment of the force transmission block according to the present invention;

[0080] Figure 8 schematically shows a three-dimensional structural diagram of an embodiment of the force transmission block according to the present invention;

[0081] Figure 9 schematically shows a stress distribution diagram of the first component according to the present invention;

[0082] Figure 10 schematically shows the force distribution diagram of the force transmission block according to the present invention;

[0083] Figure 11 schematically shows the equivalent stiffness relationship diagram;

[0084] Figure 12 schematically shows the relationship between the inclination angle of the inclined surface of the force transmission block and the vertical reaction force of the buffer body and the horizontal reaction force of the screw.

[0085] Figure 13 schematically shows a buffer connection device according to the present invention with a guide cylinder;

[0086] Figure 14 schematically shows a partially enlarged structural diagram of Figure 13.

[0087] In the diagram: 1. Bolt; 11. Screw; 12. Screw head; 2. Washer; 3. Buffer body; 30. Disc spring; 31. Guide ring; 32. Disc spring body; 33. Guide cylinder; 4. Force transmission block; 41. Inclined surface; 42. Second through hole; 61. First component; 611. First through hole; 62. Second component; 621. Threaded hole; 100. Buffer connection device.

[0088] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0089] The invention will now be described with reference to the accompanying drawings.

[0090] It should be noted that the directional terms or qualifiers such as "upper" and "lower" used in this application are all in relation to Figure 1. They are not used to define the absolute position of the parts involved, but can vary depending on the specific circumstances.

[0091] Figure 1 shows the structure of the buffer connecting device 100 according to the present invention. As shown in Figure 1, the buffer connecting device 100 is used to connect a first component 61 and a second component 62 together. In this embodiment, both the first component 61 and the second component 62 are steel plates. It should be noted that the first component 61 and the second component 62 can also be any other workpieces that need to be connected to each other. In addition, it is easy to understand that the buffer connecting device 100 is not limited to connecting two components, but can also be used to connect multiple components (e.g., three, four or more components) together. For convenience only, this embodiment will describe the connection of two components (i.e., the first component 61 and the second component 62).

[0092] The buffer connection device 100 includes a bolt 1. The bolt 1 includes a threaded rod 11 and a threaded head 12, wherein the diameter of the threaded head 12 is larger than the diameter of the threaded rod 11, and the end of the threaded rod 11 away from the threaded head 12 is provided with external threads. For connection, a first through hole 611 is provided on the first component 61, and a threaded hole 621 is provided on the second component 62. The size of the first through hole 611 is larger than the size of the threaded rod 11. Thus, the bolt 1 can pass through the first through hole 611 and engage with the threaded hole 621 through its external threads, thereby connecting the first component 61 and the second component 62 together. The first through hole 611 and the threaded hole 621 can generally be located around the periphery of the first component 61 and the second component 62, or at any desired location. The above structure is well known to those skilled in the art. Furthermore, it is readily understood that the buffer connection device of the present invention can employ various forms of threaded fasteners; the bolt 1 provided herein is merely one example and does not limit the scope of the invention.

[0093] As shown in Figure 1, the buffer connection device 100 further includes a buffer body 3 and a force transmission block 4. In one specific embodiment, the buffer body 3 is constructed as a helical spring. The helical spring is coaxially sleeved on the outside of the screw 11, with its two ends abutting against the screw head 12 and the force transmission block 4, respectively. In other embodiments of the present invention, the buffer body 3 may be an elastic body made of polyurethane material sleeved on the screw 11, or the buffer body 3 may be an elastic body made of rubber material sleeved on the screw 11.

[0094] The force transmission block 4 is coaxially sleeved on the outside of the screw 11. In a preferred embodiment of the present invention, the force transmission block 4 can be constructed as any one of a frustum, a pyramid, or a spherical frustum. However, the specific shape of the force transmission block 4 is not limited to these, as long as the lower end of the force transmission block 4 forms an inclined surface 41 (i.e., there is an inclination angle θ) with the contact surface between it and the first member 61.

[0095] In this embodiment, the force transmission block 4 is constructed in the shape of a frustum. The lower end face of the force transmission block 4 is constructed as an inclined surface 41. A second through hole 42 is provided through the center of the force transmission block 4, and the screw 11 extends through the second through hole 42 and passes through the force transmission block 4 to form a connection with the threaded hole 621 of the second component 62. In addition, the inner diameter of the force transmission block 4 is adapted to the outer diameter of the screw 11, and the outer wall of the screw 11 is in contact with the second through hole 42 of the force transmission block 4, so that the force transmission block 4 can move along the axial direction of the screw 11.

[0096] The upper end of the first through hole 611 of the first component 61 is configured to fit the inclined surface 41 of the force transmission block 4. In this embodiment, the upper end surface of the first through hole 611 of the first component 61 is set as a conical surface that fits the inclined surface 41. In this way, the inclined surface 41 of the force transmission block 4 is in contact with the conical surface at the upper end of the first component 61. In addition, the top of the force transmission block 4 is in contact with the buffer body 3.

[0097] According to the present invention, as shown in FIG. 1, the screw 11 passes through the first through hole 611 of the first component 61, and the lower end of the screw 11 is fixedly connected to the threaded hole 621 of the second component 62 by an external thread. Since there is a gap between the screw 11 and the first through hole 611, the difference between the inner diameter of the first through hole 611 and the outer diameter of the screw 11 constitutes the range of horizontal displacement that the first component 61 can generate relative to the second component 62. With this arrangement, a large horizontal sliding displacement can be generated between the first component 61 and the second component 62, effectively avoiding direct contact between the first component 61 and the screw 11, thereby preventing the horizontal load from being transmitted to the bolt 1.

[0098] Furthermore, the buffer connection device 100 according to the present invention also includes a force transmission block 4 and a buffer body 3. When the first member 61 moves horizontally relative to the second member 62, the first member 61 pushes the force transmission block 4 upward along the screw 11 via the inclined surface 41, thereby compressing the buffer body 3, thus converting the horizontal load of the first member 61 into a vertical load. At the same time, the buffer body 3 is configured to apply a preload force to the force transmission block 4, causing the force transmission block 4 to tend to move towards the first member 61. In this case, the force transmission block 4 forces the first member 61 to reset via the inclined surface 41, so that the central axis of the first through hole 611 of the first member 61 is restored to substantially coincide with the central axis of the screw 11. Therefore, according to the present invention, direct horizontal contact between the first member 61 and the screw 11 can be avoided, thereby protecting the bolt 1 and eliminating the risk of the bolt 1 breaking due to tangential stress.

[0099] It should be noted that the gap between the outer wall of the screw 11 and the first through hole 611 in this invention is different from the clearance fit in the mechanical field of the prior art; the gap between the two is much larger than the clearance fit in the prior art. In a preferred embodiment, the distance between the outer wall of the screw 11 and the inner wall of the first through hole 611 is greater than or equal to 10 mm. With this arrangement, the first component 61 can have sufficient horizontal movement space relative to the second component 62, thereby ensuring that the horizontal load is effectively converted into a vertical load to protect the bolt 1.

[0100] In a preferred embodiment, as shown in FIG1, the inclination angle θ of the inclined surface 41 is 10° to 60°. Setting the inclination angle of the inclined surface 41 within this range can better improve the protection effect on the bolt 1.

[0101] In a preferred embodiment, the contact surface between the force transmission block 4 and the first component 61 is treated with wear resistance. In a preferred embodiment, the contact surface between the force transmission block 4 and the bolt 1 is treated with wear resistance. In some specific examples, the wear resistance treatment includes, but is not limited to, providing a wear-resistant coating on at least one of the inclined surface 41 of the force transmission block 4, the upper end surface of the first through hole 611 of the first component 61 that contacts the inclined surface 41, the inner wall of the force transmission block 4, and the outer wall of the smooth rod of the bolt 1. Alternatively, a wear-resistant plate is provided on at least one of the inclined surface 41 of the force transmission block 4, the upper end surface of the first through hole 611 of the first component 61 that contacts the inclined surface 41, and the inner wall of the force transmission block 4.

[0102] As shown in Figure 1, the screw 11 passes through the first component 61 and the second component 62 sequentially from top to bottom. The buffer body 3 and the force transmission block 4 are coaxially sleeved on the screw 11 sequentially from top to bottom, and both the buffer body 3 and the force transmission block 4 are positioned between the screw head 12 and the first component 61, with the buffer body 3 located between the screw head 12 and the force transmission block 4. In this embodiment, the lower end of the screw 11 is directly connected to the threaded hole 621 of the second component 62 via an external thread, thereby providing preload to the buffer body 3. In an embodiment not shown, the lower end of the screw 11 passes through the second component 62 and is then connected to the external thread of the lower end of the screw 11 via a nut located on the surface of the second component 62 opposite to the first component 61, thereby providing preload to the buffer body 3.

[0103] According to the present invention, at least two buffer connecting devices 100 are provided to connect the first component 61 and the second component 62. As shown in FIG2, in this embodiment, the first component 61 is constructed as a square, and a first through hole 611 is provided at each of the four corners of the first component 61. Correspondingly, a threaded hole 621 is arranged at the corresponding position of the second component 62. Thus, the first component 61 and the second component 62 can be firmly connected to each other by four buffer connecting devices 100.

[0104] In this embodiment, the first component 61 is a movable part, and the second component 62 is a fixed part. After the buffer connection device 100 fixes the first component 61 and the second component 62 to each other, it can provide vertical pressure to the first component 61 and the second component 62. When the first component 61 is subjected to an external horizontal force, the first component 61 slides horizontally relative to the second component 62. Most of the external energy can be dissipated by the frictional energy dissipation between the first component 61 and the second component 62. The remaining external energy is transmitted to the bolt 1 in the form of both horizontal and vertical force, which provides better buffer protection for the bolt 1. That is, the first component 61 causes the force transmission block 4 to move vertically upward through the inclined surface 41, compressing the buffer body 3, thereby converting the horizontal displacement of the first component 61 relative to the second component 62 into the vertical deformation of the buffer body 3, effectively reducing the horizontal tangential force acting on the bolt 1.

[0105] When the first component 61 undergoes significant horizontal movement, the horizontal load on the first component 61 can be evenly distributed to the multiple buffer connection devices 100 provided on the first component 61. The force transmission block 4 then converts the large horizontal load on the first component 61 into vertical loads on the bolts 1 of the several buffer connection devices 100. In this way, all bolts 1 can be stressed simultaneously, reducing the force on a single bolt 1, which further reduces the risk of bolt breakage. By adjusting the inclination angle of the inclined surface 41 of the force transmission block 4, the horizontal and vertical forces on the bolts 1 can be analyzed and designed from different angles.

[0106] In one embodiment of the present invention, the buffer body 3 includes at least one disc spring 30 coaxially arranged, as shown in Figures 3 and 4. In this embodiment, multiple disc springs 30 are alternately sleeved on the outside of the screw 11 along the axial direction. The specific number of disc springs 30 can be adjusted according to actual usage requirements.

[0107] As shown in Figures 5 and 6, each disc spring 30 includes a guide ring 31 and a disc spring body 32. The guide ring 31 is circular in shape and arranged in a planar manner. The inner diameter of the guide ring 31 is adapted to the outer diameter of the screw 11, that is, the inner diameter of the guide ring 31 is equal to the nominal diameter of the bolt 1, so that the guide ring 31 can be coaxially sleeved on the screw 11 and move along the axial direction of the screw 11. The disc spring body 32 is conical in shape, the outer diameter of the guide ring 31 is equal to the inner diameter of the disc spring body 32, and the inner wall of the disc spring body 32 is fixed to the outer wall of the guide ring 31. In this embodiment, the disc spring body 32 and the guide ring 31 are an integral structure, or the outer side of the guide ring 31 is welded and fixed to the disc spring body 32.

[0108] In one specific embodiment, the thickness of the guide ring 31 is less than or equal to the thickness of the disc spring body 32. As shown in Figure 5, the thickness t1 of the guide ring 31 is less than or equal to the thickness t of the disc spring body 32. In this embodiment, the thickness of the guide ring 31 is much smaller than the thickness of the disc spring body 32. The guide ring 31 plays an auxiliary guiding role for the buffer body 3 and does not participate in the vertical force on the buffer body 3.

[0109] In one specific embodiment, the buffer body 3 is a combination of multiple disc springs. This approach achieves advantages such as a smaller installation height, smaller vertical compression displacement, and larger vertical load-bearing capacity.

[0110] In a preferred embodiment, a gasket 2 is provided between the buffer body 3 and the screw head 12, as shown in Figure 4. The inner diameter of the gasket 2 is smaller than the outer diameter of the screw head 12, and the outer diameter of the gasket 2 is larger than the outer diameter of the buffer body 3. The upper end face of the gasket 2 axially abuts against the lower end face of the screw head 12, and the lower end face of the gasket 2 axially abuts against the upper end face of the buffer body 3. The lower end face of the buffer body 3 axially abuts against the upper end face of the force transmission block 4, the inclined surface 41 at the lower end of the force transmission block 4 abuts against the upper end face of the first through hole 611 of the first component 61, and the lower end face of the first component 61 axially abuts against the upper end face of the second component 62.

[0111] As shown in Figures 13 and 14, in one embodiment of the invention, the buffer body 3 further includes a guide cylinder 33. The guide cylinder 33 is constructed as a circular sleeve, coaxially fitted around the outside of the bolt 1, and supported by the first member 61. The buffer body 3 (e.g., disc spring 32) is disposed inside the guide cylinder 33. The upper end of the guide cylinder 33 can be integrally connected to the gasket 2, for example, by welding. The vertical gap between the bottom of the guide cylinder 33 and the first member 61 is L3, which is approximately equal to the pre-compression displacement of the buffer body 3. After the buffer body 3 is pre-compressed, the guide cylinder 33 and the first member 61 form a tight fit, thereby preventing the buffer body 3 from generating an off-center load after vertical compression, which would cause large bending deformation of the head of the bolt 1, resulting in the bolt 1 losing its vertical guiding function for the buffer body 3. An appropriate horizontal gap L1 is provided between the inner wall of the guide cylinder 33 and the outer side of the force transmission block 4, and a horizontal gap L2 is also provided between the outer wall of the guide cylinder 33 and the edge of the first member 61. The horizontal gap L2 is slightly larger than the horizontal gap S1 between the through hole 611 of the first component 61 and the bolt 1, thereby preventing the first component 61 from losing its support for the guide cylinder 33 after generating a horizontal sliding displacement S1.

[0112] According to another aspect of the present invention, a method for calculating parameters of the buffer connection device of the present invention is provided.

[0113] During the transmission of horizontal and vertical forces, the parameter calculation of the buffer connection device 100 mainly involves stiffness calculation, including the initial stiffness, post-buckling stiffness, and equivalent stiffness of the first component 61 sliding horizontally relative to the second component 62 to form a hysteresis curve, as well as the vertical compressive stiffness of the buffer body 3. Therefore, it is necessary to study and analyze the stiffness calculation method of the buffer connection device, that is, to conduct an in-depth study on the horizontal and vertical forces on the buffer connection device 100 provided by the present invention after the first component 61 and the second component 62 are fixed.

[0114] It is easy to understand that the vertical stiffness of the buffer body 3 is the ratio of the vertical reaction force of the force transmission block 4 on the buffer body 3 to the vertical compressive displacement of the buffer body 3, and the vertical reaction force of the force transmission block 4 on the buffer body 3 is mainly determined by the forces on the first component 61 and the force transmission block 4.

[0115] As shown in Figure 9, the force on the first component 61 includes the external horizontal force F. H1 External vertical force P, vertical reaction force F provided by the second component 62 N1 and the horizontal friction force f1, and the normal reaction force F of the inclined plane provided by the force transmission block 4. N2 And the tangential frictional force f2. As shown in Figure 10, the force transmission block 4 is subjected to the vertical reaction force F from the buffer body 3. V The normal reaction force F of the inclined surface of the through hole 611 of the first component 61 N2 and the tangential friction force f2, and the horizontal reaction force F of bolt 1 H And vertical frictional force f3.

[0116] Vertical stiffness K of buffer body 3 V The vertical reaction force F of the force transmission block 4 on the buffer body 3 V The ratio of the vertical compressive displacement S2 of the buffer body 3 to the vertical reaction force F of the force transmission block 4 on the buffer body 3. V The force is mainly determined by the forces acting on the first component 61 and the force transmission block 4. As mentioned above, the forces acting on the first component 61 include the external horizontal force F. H1 External vertical force P, vertical reaction force F provided by the second component 62 N1 and the horizontal frictional force f1, and the normal reaction force F of the inclined plane 41 provided by the force transmission block 4. N2 And the tangential frictional force f2, therefore, the horizontal force relationship (1.1) and the vertical force relationship (1.2) derived from the first component 61 are: F N1 +f2sinθ=P+F N2 cosθ (1.1) F H1 -f1-f2cosθ-F N2 sinθ=ma (1.2)

[0117] Similarly, as mentioned above, the force transmission block 4 is subjected to the vertical reaction force F from the buffer body 3. V The normal reaction force F′ of the inclined surface of the through hole 611 of the first component 61 N2 and the tangential frictional force f′2, and the horizontal reaction force F of bolt 1 H2 And the vertical frictional force f3, therefore, the horizontal relationship (1.3) and the vertical force relationship (1.4) derived from the force transmission block 4 are: F′ N2 cosθ=f′2sinθ+f3+F V (1.3) f′2cosθ+F′ N2 sinθ=F H2 (1.4)

[0118] Where, f1=μ1F N1 f2=f′2=μ2F N2 =μ2F′ N2 f3=μ3F H μ1, μ2, and μ3 are the coefficients of sliding friction between the first component 61 and the second component 62, between the inclined surface 41 of the force transmission block 4 and the inclined surface of the upper end face of the through hole 611 of the first component 61, and between the bolt 1 and the force transmission block 4, respectively; θ is the inclination angle of the inclined surface 41 of the force transmission block 4; m is the mass of the first component 61 (in this embodiment, it is a steel plate) (m = 400 kg in this embodiment); a is the horizontal seismic acceleration, taken as 0.15 g, i.e., 1.47 m / s². 2 .

[0119] Combining equations (1.1) to (1.4), the vertical reaction force F of buffer body 3 can be obtained through simplified calculation. V And the horizontal reaction force F of bolt 1 H2 The relation is: F V =α(F H1 -μ1P) (1.5) F H2 =β(F H1 -μ1P) (1.6)

[0120] In the formula, α is the force transmission coefficient of buffer body 3.

[0121] β is the force transmission coefficient of bolt 1.

[0122] The vertical compressive displacement S2 of the buffer body 3 is mainly determined by the horizontal sliding of the first component 61 relative to the second component 62 and the vertical sliding of the force transmission block 4 relative to the first component 61. The first component 61 is subjected to an external horizontal force F. H1Under the action of the force transmission block 4, a horizontal sliding displacement S1 is generated, which pushes the force transmission block 4 to produce a vertical sliding, thereby compressing the buffer body 3 and causing it to produce a vertical compression displacement S2. The magnitude of the vertical compression displacement S2 of the buffer body 3 is related to the inclination angle θ between the horizontal sliding displacement S1 of the first component 61 and the inclined surface 41 of the force transmission block 4, that is: S2=S1tanθ(1.9)

[0123] The first component 61 slides horizontally on the second component 62, resulting in horizontal hysteresis energy dissipation. Part of this horizontal hysteresis energy dissipation is borne by the frictional energy dissipation between the first component 61 and the second component 62, and the other part is borne by the vertical buffering energy dissipation generated by the force transmission block 4 and the buffer body 3. The hysteresis curve formed by the horizontal hysteresis energy dissipation of the first component 61 is the horizontal force F. H The constitutive relationship between the first component 61 and the horizontal displacement S. Specifically, in this embodiment, the first component 61 is subjected to an external horizontal force F. H1 When sliding horizontally under the action of the first component 61, the external horizontal force F H1 The relationship between the vertical reaction force Fv of the buffer body 3 and the inclination angle θ of the inclined surface 41 of the force transmission block 4 is as follows:

[0124] The main parameters of the constitutive relation include the initial displacement S0, initial stiffness K1, post-buckling stiffness K2, and equivalent stiffness K of the first member 61. eff That is, when the first component 61 is subjected to an external horizontal force F... H1 When the horizontal sliding displacement S1 is reached under the action of the first component 61, the equivalent stiffness K is... eff The relation is:

[0125] As shown in Figure 11, the initial displacement S0 involved in the constitutive relation is the horizontal sliding displacement of the first component 61 when it begins to slide against the static friction between itself and the second component 62. When S1 is less than or equal to S0, the initial stiffness K1 is the ratio of the initial isolation force μ1P of the first component 61 to the initial displacement S0, that is:

[0126] Among them, the initial seismic isolation force μ1P is the static friction force between the first component 61 and the second component 62.

[0127] When S1 is greater than S0, the post-buckling stiffness K2 is the slope between the horizontal sliding displacement S1 and the initial displacement S0 of the first member 61, i.e., the external horizontal force F. H1 The difference between the initial seismic isolation force μ1P and the difference between the horizontal sliding displacement S1 and the initial displacement S0 is:

[0128] Among them, the horizontal reaction force corresponding to the horizontal sliding displacement S1 is the external horizontal force F. H1Meanwhile, the equivalent stiffness K eff It is also equal to the external horizontal force F H1 The ratio of the horizontal sliding displacement S1 to the horizontal sliding displacement S1.

[0129] In another formula, the post-buck stiffness K2 can also be calculated as follows:

[0130] The post-buck stiffness K2 of the buffer connection device 100 and the vertical stiffness K of the elastic element of the buffer connection device 100 V The relationship is as follows:

[0131] The parameter settings for each component are as follows.

[0132] The vertical compression displacement S2 of the buffer body 3 is tangent to the horizontal sliding displacement S1 of the first component 61. The larger the inclination angle θ of the inclined surface 41 of the force transmission block 4, the larger the vertical compression displacement S of the buffer body 3 will be when the horizontal sliding displacement S1 of the first component 61 remains unchanged.

[0133] Vertical reaction force F of buffer body 3 V External horizontal force F H1 The product of the difference between the static friction force f1 generated by the external vertical force P and the force transmission coefficient α. When the external horizontal force F... H1 When both the static friction force f1 and the inclination angle θ of the inclined plane 41 of the force transmission block 4 are constant, the force transmission coefficient α is smaller, and the vertical reaction force F of the buffer body 3 is... V The smaller.

[0134] The horizontal reaction force F of bolt 1's screw 11 H2 By external horizontal force F H1 The product of the difference between the static friction force f1 generated by the external vertical force P and the force transmission coefficient β. When the external horizontal force F... H1 When both the static friction force f1 and the inclined plane 41 of the force transmission block 4 remain constant, the larger the inclination angle θ, the larger the force transmission coefficient β, and the larger the horizontal reaction force F of the bolt 11. H2 The larger.

[0135] When the horizontal sliding displacement S1 of the first component 61 and the external horizontal force F H1 When the static friction force f1 and all three remain constant, the larger the inclination angle θ of the inclined plane 41 of the force transmission block 4, the greater the vertical reaction force F of the buffer body 3. V The smaller the value, the larger the vertical compressive displacement S2, and the smaller the ratio between the two, which is the vertical stiffness K of the buffer body 3. V The smaller the value, the greater the overall height H of the buffer structure. When the vertical compression displacement S2 of the buffer body 3 is large, the free height of the buffer body 3 before compression is also large, as shown in Figure 4.

[0136] When the external horizontal force F H1 When both the static friction force f1 and the bolt 11 remain constant, the horizontal reaction force F of the bolt 1 is... H2 Vertical reaction force F of buffer body 3 V The relationship between these two factors and the inclination angle θ of the inclined surface 41 of the force transmission block 4 is negatively correlated. When the horizontal reaction force F of the bolt 11 is... H2 When the pressure decreases, the vertical reaction force F of buffer body 3 V Then, by increasing the angle θ of the inclined plane 41, the force transmission block 4 with the smaller inclination angle θ is selected. At this time, the vertical compressive displacement S2 of the buffer body 3 is smaller, and the vertical stiffness K is smaller. V Relatively large.

[0137] When the buffer body 3 includes a disc spring 30, the disc spring body 32 is selected and designed. The first component 61 is subjected to an external horizontal force F. H1 Under the action of the force transmission block 4, a horizontal sliding displacement S1 is generated. According to equation (1.9), the buffer body 3 generates a vertical compressive displacement S2 under the action of the force transmission block 4. When selecting the deformation amount of the buffer body 3, its deformation amount f c It should be greater than or equal to S2. n combined disc springs, 30, bear a vertical load F. v (i.e., the vertical reaction force of buffer 3), then the vertical bearing capacity of a single disc spring 30 is F. v Therefore, the buffer 3 can be designed as follows, so that each disc spring 30 can withstand F. v / n, the deformation requirement for buffer body 3 is S2.

[0138] The diameter of screw 11 is the nominal diameter of the bolt. Based on the dimensions of screw 11, a disc spring 30 with a suitable inner diameter is selected. According to the disc spring design standard "Disc Springs" (GB / T 1972), the stiffness K of the buffer body 3 is calculated. V .

[0139] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0140] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0141] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0142] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A buffer connection device (100) for connecting at least a first component (61) and a second component (62), the buffer connection device comprising: Bolt (1), the bolt (1) comprising a shank (11) and a head (12), the shank (11) passing through a first through hole (611) in a first member (61) and extending at least into a second member (62) to connect the first member (61) and the second member (62) together; A force transmission block (4) is disposed between the screw head (12) and the first component (61), the force transmission block (4) being configured to keep the central axis of the first through hole (611) of the first component (61) substantially coincident with the central axis of the screw head (12).

2. The buffer connection device according to claim 1, characterized in that, The force transmission block (4) is adapted to the first component (61) via the inclined surface (41), and the force transmission block (4) is configured to be subjected to a preload towards the first component (61), so that the force transmission block (4) can pass through the inclined surface (41) under the action of the preload and keep the central axis of the first through hole (611) of the first component (61) substantially coincident with the central axis of the screw head (12).

3. The buffer connection device according to claim 2, characterized in that, A buffer body (3) for providing the preload is provided between the force transmission block (4) and the screw head (12).

4. The buffer connection device according to claim 3, characterized in that, The buffer (3) is constructed as at least one of a helical spring, a disc spring, and an elastomer.

5. The buffer connection device according to claim 4, characterized in that, The buffer body (3) includes at least one disc spring (30) coaxially arranged, the disc spring (30) including a disc spring body (32) for bearing vertical force, and a guide ring (31) coaxially arranged in the disc spring body (32) for adapting to the screw (11).

6. The buffer connection device according to claim 5, characterized in that, The thickness of the guide ring (31) is less than the thickness of the disc spring body (32).

7. The buffer connection device according to any one of claims 3 to 6, characterized in that, A guide cylinder (33) is provided on the outside of the buffer body (3) to prevent the buffer body (3) from being overloaded.

8. The buffer connection device according to claim 7, characterized in that, A gasket (2) is provided between the buffer body (3) and the screw head (12). The first end of the guide cylinder (33) is connected to the gasket (2), and the second end of the guide cylinder (33) is in contact with the first component (61).

9. The buffer connection device according to any one of claims 1 to 8, characterized in that, The force transmission block (4) is constructed in any one of the following shapes: frustum, prismatic, or spherical, thereby forming the inclined surface (4).

10. The buffer connection device according to any one of claims 2 to 9, characterized in that, The inclination angle of the inclined plane (41) is 10° to 60°.

11. The buffer connection device according to any one of claims 3 to 10, characterized in that, The buffer is constructed to have a vertical stiffness K. V The vertical stiffness K V K is derived from the following formula: V =F V / S2, Among them, F V S1 is the vertical reaction force of the buffer body; S2 is the vertical reaction force of the buffer body at F V Vertical compressive displacement under the action of , The vertical reaction force F V The following formula is used to derive: F V =α(F H1 -μ1P), Where: α is the force transmission coefficient of the buffer body; F H1 The external stress applied to the first component; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components. The vertical compression displacement S2 is obtained by the following formula: S2 = S1 tanθ, Where: S1 is the horizontal sliding displacement of the first component under the external stress; and θ is the inclination angle of the inclined plane. The external stress F H1 The following formula is used to derive:

12. The buffer connection device according to any one of claims 1 to 11, characterized in that, The buffer connection device is configured to have an initial stiffness K1, which is obtained by the following formula: in: μ1 is the coefficient of sliding friction between the first component and the second component; P is the vertical external force between the first component and the second component; and S0 is the horizontal sliding displacement of the first component when it begins to slide against static friction.

13. The buffer connection device according to claim 12, characterized in that, The buffer connection device is configured to have a post-buck stiffness K2, which is obtained by the following formula: or, Where: α is the force transmission coefficient of the buffer body; S1 is the external stress F of the first component. H1 The horizontal sliding displacement under the action of F, at which point S1 is greater than S0; H1 The external stress is μ1; the sliding friction coefficient between the first component and the second component is μ1; and the vertical external force between the first component and the second component is P.

14. The buffer connection device according to any one of claims 11 to 13, characterized in that, The force transmission coefficient α of the buffer body is obtained by the following formula: Wherein, μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; μ3 is the coefficient of sliding friction between the bolt and the force transmission block; and θ is the inclination angle of the inclined surface.

15. The buffer connection device according to any one of claims 1 to 14, characterized in that, The bolt is configured to have a horizontal reaction force F H2 The horizontal reaction force F H2 The following formula is used to derive: F H2 =β(F H1 -μ1P), Wherein: F H2 β is the horizontal reaction force of the bolt; β is the force transmission coefficient of the bolt; F H1 denoted as external stress; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components.

16. The buffer connection device according to claim 15, characterized in that, The force transmission coefficient β of the bolt is obtained by the following formula: Where: μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; θ is the inclination angle of the inclined surface.

17. A method for calculating parameters of a buffer connection device according to any one of claims 3 to 10, wherein, The vertical stiffness K of the buffer body V K is derived from the following formula: V =F V / S2, Among them, F V S1 is the vertical reaction force of the buffer body; S2 is the vertical reaction force of the buffer body at F V Vertical compressive displacement under the action of; The vertical reaction force F V The following formula is used to derive: F V =α(F H1 -μ1P), Where: α is the force transmission coefficient of the buffer body; F H1 The external stress applied to the first component; μ1 is the coefficient of sliding friction between the first and second components; and P is the vertical external force between the first and second components. The vertical compression displacement S2 is obtained by the following formula: S2 = S1 tanθ, Wherein: S1 is the horizontal sliding displacement of the first component under the external stress; and θ is the inclination angle of the inclined plane; The external stress F H1 The following formula is used to derive:

18. The parameter calculation method according to claim 17, characterized in that, The initial stiffness K1 of the buffer connection device is obtained by the following formula: in: μ1 is the coefficient of sliding friction between the first component and the second component; P is the vertical external force between the first component and the second component; and S0 is the horizontal sliding displacement of the first component when it begins to slide against static friction, and The post-buck stiffness K2 of the buffer connection device is obtained by the following formula: or, Where: α is the force transmission coefficient of the buffer body; S1 is the external stress F of the first component. H1 The horizontal sliding displacement under the action of F, at which point S1 is greater than S0; H1 The external stress is μ1; the sliding friction coefficient between the first component and the second component is μ1; and the vertical external force between the first component and the second component is P.

19. The parameter calculation method according to claim 17 or 18, characterized in that, The force transmission coefficient α of the buffer body is obtained by the following formula: Wherein, μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; μ3 is the coefficient of sliding friction between the bolt and the force transmission block; and θ is the inclination angle of the inclined surface.

20. The parameter calculation method according to any one of claims 17 to 19, characterized in that, The horizontal reaction force F of the bolt H2 The following formula is used to derive: F H2 =β(F H1 -μ1P), Wherein: F H2 β is the horizontal reaction force of the bolt; β is the force transmission coefficient of the bolt; F H1 The external stress is μ1; the sliding friction coefficient between the first and second components is μ1; and the vertical external force between the first and second components is P. The force transmission coefficient β of the bolt is obtained by the following formula: Where: μ2 is the coefficient of sliding friction between the inclined surface of the force transmission block and the first component; θ is the inclination angle of the inclined surface.

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