A reverse cam drive displacement amplification type friction damper

Abstract

The application discloses a kind of anti cam transmission displacement amplification type friction damper, belong to building engineering structure damping field, the friction damper, including lower connecting plate, upper connecting plate, sliding plate and sliding block;The sliding plate press fits between lower connecting plate and upper connecting plate, the top surface and bottom surface of sliding plate and lower connecting plate and upper connecting plate friction sliding contact, sliding block is slidably arranged in upper connecting plate, the lower end of sliding block passes through upper connecting plate and is connected with sliding plate by sliding slot, the sliding direction of sliding block and the sliding direction of sliding plate are perpendicular to each other, the axial direction of sliding slot and the sliding direction of sliding plate are arranged at angle;The friction damper utilizes anti cam transmission principle to amplify the sliding friction displacement of damper, can efficiently consume building energy, and installation is convenient and efficient convenient.

Description

Technical Field

[0001] This invention relates to the field of structural vibration reduction in building engineering, and more particularly to an amplified displacement friction damper, specifically a reverse cam-driven displacement amplified friction damper. Background Technology

[0002] Building structure energy dissipation and vibration reduction technology improves structural safety by installing dampers at specific locations within the structure. Structural deformation causes the dampers to activate, dissipating the energy exerted by an earthquake on the structure. Dampers are classified into shear dampers and tension-compression dampers based on their stress performance. Shear dampers are typically installed between structural floors or at the connection points.

[0003] Friction dampers are a common type of energy-dissipating and vibration-damping device. They typically use a special type of bolt connection combined with certain materials with a high coefficient of friction to efficiently dissipate energy. They mainly rely on the limited sliding friction between the connecting parts to dissipate energy, and no material yielding occurs during the energy dissipation process.

[0004] Friction dampers are displacement-type dampers, in which the relative displacement of the friction components directly affects the energy dissipation effect of the damper. In earthquakes, traditional friction dampers often have low energy dissipation efficiency because the relative deformation of the structural components connected to the damper is small during an earthquake. Summary of the Invention

[0005] To address the problems existing in the prior art, this invention provides a reverse cam transmission displacement amplification friction damper, which has a displacement amplification function, can efficiently consume building energy, and is easy and convenient to install.

[0006] This invention is achieved through the following technical solution:

[0007] A reverse cam transmission displacement amplification friction damper includes a lower connecting plate, an upper connecting plate, a sliding plate, and a slider;

[0008] The sliding plate is press-fitted between the lower connecting plate and the upper connecting plate. The top and bottom surfaces of the sliding plate are in frictional sliding contact with the lower and upper connecting plates. The slider is set in the upper connecting plate and can slide. The lower end of the slider passes through the upper connecting plate and is connected to the sliding plate through a sliding groove. The sliding direction of the slider is perpendicular to the sliding direction of the sliding plate. The axial direction of the sliding groove is set at an angle to the sliding direction of the slider.

[0009] Preferably, an upper friction plate is fixedly connected to the bottom surface of the upper connecting plate, and a lower friction plate is fixedly connected to the top surface of the lower connecting plate.

[0010] Preferably, the slider is provided with a limiting hole to limit the sliding displacement of the slider and prevent the slider from locking with the groove.

[0011] Preferably, the sliding plate is provided with a slot for limiting the sliding displacement of the sliding plate, and the fastener passes through the slot to connect the lower connecting plate and the upper connecting plate.

[0012] Preferably, the upper connecting plate includes two symmetrically arranged L-shaped connecting plates, with the slider clamped between the two connecting plates.

[0013] Preferably, the slider includes a slider body and a sliding block disposed at the bottom and cooperating with the slide groove.

[0014] Preferably, the groove is a dovetail groove and the sliding block is a dovetail block.

[0015] Preferably, the top of the slider is provided with an ear plate, and the ear plate is provided with a pin hole.

[0016] Preferably, the lower connecting plate 1 is provided with bolt holes on both sides for connecting with the pre-embedded bolts of the building.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] This invention discloses a reverse cam transmission displacement amplification friction damper. A sliding plate is press-fitted between a lower connecting plate and an upper connecting plate. A slider passes through the upper connecting plate and connects to a groove in the sliding plate. The groove is obliquely oriented. The slider and the groove wall interact to generate the driving force for the sliding plate. When the driving force on the sliding plate exceeds the maximum static friction force of the friction unit, the sliding plate and the friction plate generate frictional sliding to dissipate energy. Simultaneously, a pin passes through a limiting hole in the slider and connects to the upper connecting plate. The slider slides within the upper connecting plate. During the sliding process, due to the reverse force from the groove wall, the slider tends to tilt in the horizontal plane, causing the slider and the sliding plate to lock together. The pin and limiting hole horizontally limit the slider, preventing tilting during sliding and solving the problem of the slider and groove locking together. This friction damper utilizes the reverse cam transmission principle to amplify the sliding friction displacement of the damper, enabling efficient energy dissipation in buildings, and is convenient and easy to install.

[0019] Furthermore, the damper can also adjust the friction force of the friction unit by applying positive pressure, which can be achieved by controlling the tightening force of the high-strength bolts.

[0020] Furthermore, the anti-cam transmission displacement amplification friction damper is connected to the building structure through high-strength bolts and ear plate pins, which is convenient for construction and easy for maintenance and replacement. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a reverse cam transmission displacement amplification friction damper according to the present invention.

[0022] Figure 2This is a front view of the anti-cam transmission displacement amplification friction damper of the present invention.

[0023] Figure 3 This is a top view of the anti-cam transmission displacement amplification friction damper of the present invention.

[0024] Figure 4 This is a side view of the anti-cam transmission displacement amplification friction damper of the present invention.

[0025] Figure 5 This is a schematic diagram of the lower connecting plate of the present invention.

[0026] Figure 6 This is a schematic diagram of the friction plate of the present invention.

[0027] Figure 7 This is a schematic diagram of the sliding plate of the present invention.

[0028] Figure 8 This is a schematic diagram of the friction plate of the present invention.

[0029] Figure 9 This is a schematic diagram of the upper connecting plate of the present invention.

[0030] Figure 10 This is a schematic diagram of the slider of the present invention.

[0031] In the diagram, 1-lower connecting plate, 2-lower friction plate, 3-sliding plate, 4-upper friction plate, 5-upper connecting plate, 6-slider, 7-limiting bolt, 8-limiting nut, 9-high-strength bolt, 10-high-strength nut, 101-bolt hole, 102-bolt hole, 201-bolt hole, 301-dovetail groove, 302-groove hole, 401-bolt hole, 402-upper friction plate slider hole, 501-angle steel limiting hole, 502-bolt hole, 601-pin hole, 602-limiting hole, 603-dovetail slider. Detailed Implementation

[0032] The present invention will now be described in further detail with reference to the accompanying drawings. These descriptions are intended to explain the invention and not to limit it.

[0033] See Figure 1-10 A reverse cam transmission displacement amplification friction damper includes a lower connecting plate 1, an upper connecting plate 5, a sliding plate 3, and a slider 6.

[0034] The sliding plate 3 is press-fitted between the lower connecting plate 1 and the upper connecting plate 5. The top and bottom surfaces of the sliding plate 3 are in frictional sliding contact with the lower connecting plate 1 and the upper connecting plate 5, and the sliding plate 3 can slide along the first direction. The slider is embedded in the upper connecting plate 5 and can slide along the second direction, which is perpendicular to the first direction. The lower end of the slider passes through the upper connecting plate 5 and is connected to the sliding plate 3 through a groove, and the axis of the groove is set at an angle to the first direction.

[0035] The upper connecting plate 5 has an upper friction plate 4 bonded to its bottom surface, and the lower connecting plate 1 has a lower friction plate 2 bonded to its top surface. The sliding plate is located between the upper friction plate 4 and the lower friction plate 2. The two sides of the slider are in contact with the two friction plates, which increases the frictional resistance during displacement and improves the energy consumption effect.

[0036] See Figure 9 The upper connecting plate 5 includes two symmetrically arranged L-shaped connecting plates, with the vertical side plates of the two connecting plates spaced apart. Angle steel bolt holes 502 are provided on the horizontal plate of the connecting plate, and angle steel limiting holes 501 are provided on the vertical side plate.

[0037] See Figure 10 The slider includes a slider body with a dovetail block 603 at the bottom and an ear plate at the top. The ear plate has a pin hole 601. The slider body has a slider limiting hole 602. The length direction of the slider limiting hole 602 is set along the second direction. The slider body is press-fitted between two vertical side plates. The limiting bolt 7 passes through the angle steel limiting hole 501 and the slider limiting hole 602 and is connected to the limiting nut 8 to press-fit the slider body between two connecting plates. The slider ear plate pin hole 601 is located at the upper end of the vertical side plate.

[0038] See Figure 7 The sliding plate is provided with a slot 302 and a dovetail groove 301. The dovetail groove 301 cooperates with the dovetail block 603 at the bottom of the slider to form a tenon and mortise sliding structure. The slot 302 is a strip-shaped hole. The four slots are arranged in a rectangle at the four corners of the sliding plate, and the axial direction of the strip-shaped holes is parallel to each other. The axial direction of the strip-shaped holes is set along the first direction. The dovetail groove 301 is set in the middle of the sliding plate and is arranged at a certain angle, that is, it is set at an angle with the second direction.

[0039] The lower connecting plate 1 and the lower friction plate 2 are provided with coaxial bolt holes 101 and 201, the upper friction plate 4 and the upper connecting plate 5 are provided with coaxial bolt holes 401 and 502, the upper friction plate 4 is provided with a slider hole 402, the lower friction plate 2 and the upper friction plate 4 are located at the bottom and top of the sliding plate respectively, the dovetail block is installed in the dovetail groove, the high-strength bolt 9 passes through the bolt hole and the groove hole 302 and is connected with the high-strength nut 10 to form a high-strength bolt connection pair, and the sliding plate is pressed between the lower friction plate 2 and the upper friction plate 4.

[0040] The lower connecting plate 1 is also provided with bolt holes 102 on both sides for connection with pre-embedded bolts in the building. The slider 6 is provided with pin holes 601 for connection with the building. In use, the lower connecting plate is connected to the building through the bolt holes, and the slider is connected to the building through the pin. During an earthquake, the components connected to the damper will not only experience relative displacement, but may also rotate to a certain extent. The connection of the slider to the building through the pin can release the rotational freedom at the connection point, ensuring that the damper moves in a preset mode to dissipate energy.

[0041] In another embodiment, the mortise and tenon sliding structure includes a T-shaped block and a T-shaped groove that cooperates with it. The T-shaped block is disposed at the bottom of the slider body, and the T-shaped groove is disposed on the sliding plate.

[0042] The following is a detailed description of the installation method of the anti-cam transmission displacement amplification friction damper provided by this invention, including the following steps:

[0043] Step 1: Attach the lower friction plate 2 to the upper surface of the lower connecting plate 1, and attach the upper friction plate 4 to the lower surface of the upper connecting plate 5;

[0044] Step 2: Fit the dovetail block 603 of the slider into the dovetail groove 301 of the sliding plate;

[0045] Step 3: Set the sliding plate between the lower connecting plate 1 and the upper connecting plate 5, and the slider body passes through the slider hole 402 of the upper friction plate 4 and is located between the two connecting plates;

[0046] Step 4: Use high-strength bolts to connect the lower connecting plate 1, the sliding plate 3, and the upper connecting plate 5, so that the sliding plate is pressed between the lower connecting plate 1 and the upper connecting plate 5. The limiting bolt passes through the limiting hole of the slider 6 and the upper connecting plate 5 to complete the installation of the friction damper.

[0047] The energy dissipation method of a displacement-amplifying friction damper for reverse cam transmission provided by the present invention is described in detail below:

[0048] In this embodiment, the first direction is the width direction of the damper, and the second direction is located in the length direction of the damper.

[0049] Under load, the slider interacts with the groove wall to generate a driving force for the sliding plate. The slider moves along the first direction within the limitation range of the limiting hole 602. When the driving force on the sliding plate is greater than the maximum static friction force of the friction unit, the sliding plate slides relative to the lower connecting plate with the lower friction plate and the upper connecting plate with the upper friction plate, generating friction and consuming energy. Due to the principle of reverse cam transmission changing the direction of displacement, it can be known that the ratio of the sliding displacement of the friction unit to the displacement of the slider is... (θ is the inclination angle of the groove of the sliding plate), which realizes the displacement amplification function of the anti-cam transmission displacement amplification friction damper.

[0050] The damper can also adjust the friction force of the friction unit by applying positive pressure, which can be controlled by tightening the high-strength bolts.

[0051] The reverse cam transmission displacement amplification friction damper provided by this invention amplifies the sliding friction displacement of the damper by utilizing the reverse cam transmission principle, and has the advantages of strong energy dissipation capacity and stable working performance. The reverse cam transmission displacement amplification friction damper has a simple structure, is easy to manufacture, and has low cost. The reverse cam transmission displacement amplification friction damper is connected to the building structure through high-strength bolts and ear plate pins, which is convenient for construction and easy for maintenance and replacement.

[0052] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. A reverse cam transmission displacement amplification friction damper, characterized in that, Includes a lower connecting plate, an upper connecting plate, a sliding plate, and a slider; The upper connecting plate includes two symmetrically arranged L-shaped connecting plates, and the slider is clamped between the two connecting plates; The sliding plate is press-fitted between the lower connecting plate and the upper connecting plate. The top and bottom surfaces of the sliding plate are in frictional sliding contact with the lower and upper connecting plates. The slider is set in the upper connecting plate and can slide. The lower end of the slider passes through the upper connecting plate and is connected to the sliding plate through a sliding groove. The sliding direction of the slider is perpendicular to the sliding direction of the sliding plate. The axial direction of the sliding groove is set at an angle to the sliding direction of the sliding plate. The slider is provided with a slider limiting hole, and the vertical side plates of the two L-shaped connecting plates are provided with angle steel limiting holes, and limiting bolts are provided that pass through the angle steel limiting holes and the slider limiting holes to limit the sliding displacement of the slider and prevent the slider from locking with the slide groove.

2. The anti-cam transmission displacement amplification friction damper according to claim 1, characterized in that, An upper friction plate is fixedly connected to the bottom surface of the upper connecting plate, and a lower friction plate is fixedly connected to the top surface of the lower connecting plate.

3. The anti-cam transmission displacement amplification friction damper according to claim 1, characterized in that, The sliding plate is provided with slots to limit the sliding displacement of the sliding plate, and fasteners pass through the slots to connect the lower connecting plate and the upper connecting plate.

4. A reverse cam transmission displacement amplification friction damper according to claim 1, characterized in that, The slider includes a slider body and a sliding block disposed at the bottom and cooperating with a sliding groove.

5. A reverse cam transmission displacement amplification friction damper according to claim 1, characterized in that, The groove is a dovetail groove, and the sliding block is a dovetail block.

6. A displacement-amplifying friction damper for reverse cam transmission according to claim 1, characterized in that, The top of the slider is provided with an ear plate, and the ear plate is provided with a pin hole.

7. A reverse cam transmission displacement amplification friction damper according to claim 1, characterized in that, The lower connecting plate is also provided with bolt holes on both sides for connecting with the pre-embedded bolts of the building.

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