Gear structure damper based on shape memory alloy

Abstract

The invention discloses a gear structure damper based on shape memory alloy, which relates to the technical field of building and civil engineering and comprises a lower connecting plate, an upper connecting plate, a large-diameter gear, a small-diameter gear, a clamp, a shape memory alloy wire, a bolt, a bearing and the like. The damper device is reasonable in structure, convenient to assemble, reliable in connection and excellent in energy dissipation capacity and self-resetting function, the problems that traditional damping equipment is insufficient in energy dissipation capacity, discordant in displacement and the like can be solved through the arranged gear mechanism, and the damper device has wide application prospects in the fields of buildings and civil engineering.

Description

Technical Field

[0001] The invention relates to the technical field of architecture and civil engineering, and in particular to a gear structure damper based on shape memory alloy. Background Art

[0002] Earthquakes can cause huge and irreparable damage to the country and the people. Earthquakes can cause economic losses, environmental pollution and casualties. First of all, earthquakes occur suddenly, and it is difficult to predict the occurrence of earthquakes in advance and accurately with the existing technical level. Secondly, aftershocks and secondary disasters caused by earthquakes will cause secondary damage to the victims in the earthquake-stricken areas. Buildings affected by earthquakes suffer huge losses, not only the structural components in the buildings, but also the damage to non-structural components, which is inestimable for the loss of people's lives and property.

[0003] Traditional earthquake design methods generally improve the stiffness of the structure, such as increasing the cross-sectional size of the components, increasing the stiffness and strength of the materials, etc. At the same time, it is also necessary to ensure that the structure has a certain deformation capacity and ductility. In this way, the purpose of consuming earthquake energy can be achieved through the deformation of the structure itself. Modern earthquake-resistant design concepts have met the defense goal of "not collapsing in a major earthquake". However, this method will waste materials, increase costs, cause serious environmental pollution, and the effect is significantly affected by the construction process. With the development of science and technology, more reasonable earthquake-resistant methods are replacing traditional design methods.

[0004] When an earthquake occurs, the damper can be used to dissipate energy and reduce shock to reduce the response of the original structure under the earthquake. The damper and the original structure form a new overall structure, and the dynamic characteristics of such a new structure will change significantly, so the damper reduces the damage to the structure under the action of the earthquake. Moreover, the addition of the damper will not change the use function of the original building, and maintain the original appearance, and the construction is simple. The existing dampers are mostly made of materials such as metal and rubber, and some ignore the control of residual deformation. The problem of this type of damper is that after a major earthquake, the damper cannot maintain its original function and continue to be used, and it is difficult to repair. Some have better residual deformation control, but lack energy dissipation capacity. There are also some dampers with self-reset function that will fail when the structure undergoes large displacement. It is necessary to develop a damper that can be suitable for larger structural vibration displacement and has self-reset function. Shape memory alloy materials are superelastic intelligent materials with strong deformation ability, which can be completely restored to the initial state after unloading. Therefore, shape memory alloys have stable self-reset deformation recovery ability and have broad application prospects in dampers. Summary of the invention

[0005] The purpose of the present invention is to provide a gear structure damper based on shape memory alloy in order to solve the above problems. Through reasonable structural design, the device can realize self-reset, self-repair, displacement adaptation and other functions under the premise of meeting energy consumption requirements. The device is simple and convenient to install, suitable for the fields of construction and civil engineering, and has great application prospects.

[0006] In order to solve the above problems, the present invention provides a technical solution: a gear structure damper based on shape memory alloy, comprising a lower connecting plate, an upper connecting plate, a large diameter gear, a small diameter gear, a clamp, a shape memory alloy wire, a bolt and a bearing; a row of racks is provided at the midline of the upper surface of the lower connecting plate; the upper connecting plate is a T-shaped member, the large diameter gear is connected to the vertical steel plate of the upper connecting plate by bolts and bearings, and meshes with the rack of the lower connecting plate, and the width of the rack is greater than the width of the large diameter gear; the small diameter gear is connected to the vertical steel plate of the upper connecting plate by bolts and bearings On the steel plate, there are two small diameter gears, which are respectively placed on both sides of the large diameter gear and meshed with the large diameter gear; a clamp is provided at the center position of the side of the large diameter gear, and two clamps spaced apart from each other are provided on the side of the small diameter gear; two clamps spaced apart from each other are provided on the inner side of the upper connecting plate, and the clamp of the upper connecting plate is located directly above the small diameter gear; a shape memory alloy wire is connected between the clamp of the upper connecting plate and a clamp on the small diameter gear; a shape memory alloy wire is also connected between another clamp on the small diameter gear and the clamp on the large diameter gear.

[0007] Preferably, a bolt hole for fixing the lower connecting plate to the external structure is reserved at the end of the lower connecting plate.

[0008] Preferably, bolt holes for fixing the upper connecting plate to the external structure are reserved at the end of the upper connecting plate.

[0009] Preferably, the large-diameter gear and the small-diameter gear are coated with grease.

[0010] The beneficial effects of the present invention are as follows: the present invention has reasonable structure, convenient assembly, reliable connection, excellent energy dissipation capacity and self-resetting function, and can be applied to situations where large displacement and dislocation of the structure occur. It has broad application prospects in damper devices in the fields of construction and civil engineering. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 It is a front view structural schematic diagram of the present invention. DETAILED DESCRIPTION

[0013] like Figure 1 and Figure 2 As shown, this specific embodiment adopts the following technical scheme: a gear structure damper based on shape memory alloy, comprising a lower connecting plate 1, an upper connecting plate 2, a large diameter gear 3, a small diameter gear 4, a clamp 5, a shape memory alloy wire 6, a bolt 7 and a bearing 8; a row of racks are provided at the midline of the upper surface of the lower connecting plate 1; the upper connecting plate 2 is a T-shaped member, the large diameter gear 3 is connected to the vertical steel plate of the upper connecting plate 2 by bolts 7 and bearings 8, and meshes with the rack of the lower connecting plate 1, and the width of the rack is greater than the width of the large diameter gear 3; the small diameter gear 4 is connected to the vertical steel plate of the upper connecting plate 2 by bolts 7 and bearings 8 There are two small diameter gears 4, which are respectively placed on both sides of the large diameter gear 3 and meshed with the large diameter gear 3; a clamp 5 is provided at the center position of the side of the large diameter gear 3, and two clamps 5 spaced apart from each other are provided on the side of the small diameter gear 4; two clamps 5 spaced apart from each other are provided on the inner side of the upper connecting plate 2, and the clamp 5 of the upper connecting plate 2 is located directly above the small diameter gear 4; a shape memory alloy wire 6 is connected between the clamp 5 of the upper connecting plate 2 and a clamp 5 on the small diameter gear 4; a shape memory alloy wire 6 is also connected between another clamp 5 on the small diameter gear 4 and the clamp 5 on the large diameter gear 3.

[0014] Among them, the end of the lower connecting plate 1 has a bolt hole for fixing it to the external structure with the bolt 7; the end of the upper connecting plate 2 has a bolt hole for fixing it to the external structure with the bolt 7; the large diameter gear 3 and the small diameter gear 4 are coated with grease.

[0015] The use state of the present invention is: when the structure vibrates, the lower connecting plate 1 and the upper connecting plate 2 are offset from each other, so that the large diameter gear 3 rolls on the rack track, and the rotation of the large diameter gear 3 drives the rotation of the small diameter gear 4, and the clamp 5 rotates with the small diameter gear 4. Due to the rotation of the clamp 5, the shape memory alloy wire 6 is stretched to absorb energy. In the process of reciprocating motion, the shape memory alloy wire 6 will be repeatedly stretched and restored to consume energy. After the vibration ends, the damper can be restored to its initial state by utilizing the superelasticity and deformation recovery ability of the shape memory alloy wire 6.

[0016] When a larger displacement occurs, the rotation angle of the small diameter gear 4 is larger, and the clamp 5 of the small diameter gear 4 is installed at a position biased towards the edge of the small diameter gear 4, so that the maximum elongation of each shape memory alloy wire 6 is within a reasonable range, and the horizontal and vertical shape memory alloy wires 6 will not collide during operation. Due to the superelastic properties of the shape memory alloy wire 6, the present invention will not be damaged or fail under larger displacements.

[0017] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0018] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation", "screw-on" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0019] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A gear structure damper based on shape memory alloy, characterized in that: It comprises a lower connecting plate (1), an upper connecting plate (2), a large-diameter gear (3), a small-diameter gear (4), a clamp (5), a shape memory alloy wire (6), a bolt (7) and a bearing (8); A row of racks is provided at the midline of the upper surface of the lower connecting plate (1); The upper connecting plate (2) is a T-shaped member, the large-diameter gear (3) is connected to the vertical steel plate of the upper connecting plate (2) through bolts (7) and bearings (8), and meshes with the rack of the lower connecting plate (1), and the width of the rack is greater than the width of the large-diameter gear (3); The small diameter gear (4) is connected to the vertical steel plate of the upper connecting plate (2) through bolts (7) and bearings (8). There are two small diameter gears (4), which are respectively placed on both sides of the large diameter gear (3) and mesh with the large diameter gear (3). A clamp (5) is provided at the center of the side surface of the large-diameter gear (3), and two clamps (5) spaced apart from each other are provided on the side surface of the small-diameter gear (4); Two mutually spaced clamps (5) are provided on the inner side surface of the upper connecting plate (2), and the clamps (5) of the upper connecting plate (2) are located directly above the small-diameter gear (4); A shape memory alloy wire (6) is connected between the clamp (5) of the upper connecting plate (2) and a clamp (5) on the small diameter gear (4); A shape memory alloy wire (6) is also connected between another clamp (5) on the small-diameter gear (4) and the clamp (5) on the large-diameter gear (3).

2. The gear structure damper based on shape memory alloy according to claim 1, characterized in that: The end of the lower connecting plate (1) is provided with a bolt hole for fixing the lower connecting plate (1) to the external structure with a bolt (7).

3. The gear structure damper based on shape memory alloy according to claim 1, characterized in that: Bolt holes for fixing the upper connecting plate (2) to the external structure with bolts (7) are reserved at the end of the upper connecting plate (2).

4. The gear structure damper based on shape memory alloy according to claim 1, characterized in that: The large-diameter gear (3) and the small-diameter gear (4) are coated with lubricating grease.

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