Double-order friction damper

Abstract

The invention discloses a double-order friction damper, and relates to the technical field of friction dampers. Comprising a restraining plate, main sliding plates are installed on the two sides of the restraining plate, and main friction plates are fixed to the inner walls of the main sliding plates; the device further comprises a fastener, and the fastener is used for fastening and installing the restraining plate and the main sliding plate. The left side of the restraint plate is sleeved with a stepped displacement rail, auxiliary sliding plates are arranged on the front side and the rear side of the stepped displacement rail and fixed to a cavity of the inner wall of the main sliding plate, and auxiliary friction plates are fixed to the two sides of each auxiliary sliding plate. The inertia abutting assembly is arranged in the main sliding plate and used for abutting against the auxiliary friction plate. According to the double-order friction damper, by arranging double-order friction, the anti-seismic damping effect can be improved, and meanwhile the double-order friction damper is suitable for vibration of different degrees.

Description

Technical Field

[0001] The present invention relates to the technical field of friction dampers, in particular to a double-stage friction damper. Background Art

[0002] The main working principle of the two-stage friction damper currently on the market is to trigger the second-stage displacement through the displacement limiting hole of the sliding plate to generate the second-stage damping force. However, this form is only triggered in the one-way stroke during reciprocating motion. When returning to the single-stage working mode, the damping force is immediately reduced; there is no actual reduction in the damping force according to the two-stage displacement stage; similarly, there are corresponding problems in connecting friction dampers with different damping forces in series to achieve two-stage displacement. In fact, the above-mentioned market solutions do not, strictly speaking, truly achieve the output of graded damping force based on staged displacement. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-stage friction damper to solve the problems raised by the above-mentioned background technology. The technical solution of the present invention addresses the technical problem that the existing technical solution is too single and provides a solution that is significantly different from the existing technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a two-stage friction damper, comprising a constraint plate, main sliding plates are mounted on both sides of the constraint plate, and a main friction plate is fixed on the inner wall of the main sliding plate; Also included are fasteners for fastening and installing the restraining plate and the main sliding plate; A stepped displacement track is sleeved on the left side of the constraint plate, and auxiliary sliding plates are provided on the front and rear sides of the stepped displacement track. The auxiliary sliding plates are fixed to the inner wall cavity of the main sliding plate, and auxiliary friction plates are fixed on both sides of the auxiliary sliding plates; An inertia conflict component is provided in the main sliding plate and is used for conflicting with the secondary friction plate.

[0005] Preferably, the main friction plate is made of rubber material, and the main friction plate is in contact with the front and rear sides of the constraint plate.

[0006] Preferably, the fastener includes a clamping bolt and a clamping disc spring, the clamping bolt is installed between the two main sliding plates and the constraint plate, and a clamping disc spring is provided between the clamping bolt and the main sliding plate.

[0007] Preferably, the clamping bolts are distributed at equal intervals on the main sliding plate, and there is movable space between the main sliding plate and the restraining plate.

[0008] Preferably, a protrusion structure is provided in the middle of the stepped displacement track, and the protrusion in the middle of the stepped displacement track conflicts with the auxiliary sliding plate.

[0009] Preferably, the auxiliary friction plates are symmetrically distributed on both sides of the auxiliary sliding plate, and in an initial state, the auxiliary friction plates do not contact the central protrusion of the stepped displacement track.

[0010] Preferably, the inertia resistance assembly includes an inertia bar, which is slidably installed in the main sliding plate through a spring, and a resistance bar is provided at the outer end of the inertia bar, which passes through the main sliding plate and is fixed to the secondary friction plate.

[0011] Preferably, the inertia bar is symmetrically arranged with respect to the auxiliary sliding plate, and the outer end of the inertia bar and the outer end of the interference bar are designed to be inclined structures.

[0012] Compared with the prior art, the present invention has the following beneficial effects: According to the present invention, under the first-order displacement working condition, the motion contact state of the secondary sliding plate and the stepped displacement track always keeps the secondary friction plate isolated from the constraint plate, that is, no friction is generated with the constraint plate and no additional damping force is generated. At the same time, the main friction plate always generates friction with the constraint plate during the entire working displacement state, that is, friction damping force is always generated. When the product displacement reaches the second working condition, the motion contact state of the secondary sliding plate and the stepped displacement track is transformed into the second stage, so that the secondary friction plate comes into contact with the constraint plate. At the same time, under the preload force of the compression disc spring, the secondary friction plate begins to generate friction damping force, that is, additional friction damping force under the second-order displacement. When the secondary sliding plate starts to move back, i.e., returns to the midpoint position, due to the bidirectional step design of the step displacement track, the secondary friction plate still generates contact friction with the constraint plate, which continuously generates damping force. Only when the secondary sliding plate enters the first-order displacement design stroke of the step displacement track, the secondary friction plate separates from the constraint plate, the additional friction damping force is zero, and the working condition returns to the first-order state. An inertial resistance component is set to generate different inertial forces according to the vibration amplitude. When the main sliding plate moves, the inertial force causes the inertia bar to temporarily maintain its original position, and the inertia bar pushes the resistance bar to move, thereby resisting the secondary friction plate, increasing the friction between the secondary friction plate and the stepped displacement track in the second stage, thereby increasing the damping force. According to the vibration amplitude and inertial force, the damping friction force of the secondary friction plate is adjusted in real time to improve the friction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of a top-view cross-sectional structure of the present invention; Figure 3 Schematic diagram of the top view of the step-displacement track structure of the present invention; Figure 4 For the present invention Figure 3 A in the middle is an enlarged structural diagram; Figure 5 For the present invention Figure 3 Enlarged structural diagram at point B in the middle.

[0014] In the figure: 1. Constraint plate; 2. Main sliding plate; 3. Main friction plate; 4. Clamping bolt; 5. Clamping disc spring; 6. Step displacement track; 7. Secondary sliding plate; 8. Secondary friction plate; 9. Inertia resistance assembly; 91. Inertia bar; 92. Spring; 93. Resistance bar. DETAILED DESCRIPTION

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] See also Figure 1-Figure 5 The present invention provides a technical solution: a two-stage friction damper, comprising a constraint plate 1, with main sliding plates 2 mounted on both sides of the constraint plate 1, and a main friction plate 3 fixed on the inner wall of the main sliding plate 2; the main friction plate 3 is made of rubber material, and the main friction plate 3 contacts the front and rear sides of the constraint plate 1; When vibration occurs, the main sliding plate 2 moves according to the vibration direction, and long-term friction damping is generated between the main friction plate 3 and the constraint plate 1.

[0017] As a specific embodiment of the present invention, fasteners are used to fasten and install the constraint plate 1 and the main sliding plate 2; a stepped displacement track 6 is provided on the left side of the constraint plate 1, and auxiliary sliding plates 7 are provided on the front and rear sides of the stepped displacement track 6. The auxiliary sliding plates 7 are fixed to the inner wall cavity of the main sliding plate 2, and auxiliary friction plates 8 are fixed on both sides of the auxiliary sliding plates 7; The fasteners include a clamping bolt 4 and a clamping disc spring 5. The clamping bolt 4 is installed between the two main sliding plates 2 and the constraint plate 1. A clamping disc spring 5 is provided between the clamping bolt 4 and the main sliding plate 2. The clamping bolts 4 are evenly spaced on the main sliding plate 2, and there is space for the clamping bolts 4 to move between the main sliding plate 2 and the constraint plate 1. A raised structure is provided in the middle of the stepped displacement track 6, and the raised structure in the middle of the stepped displacement track 6 conflicts with the auxiliary sliding plate 7. The auxiliary friction plates 8 are symmetrically distributed on both sides of the auxiliary sliding plate 7. In the initial state, the auxiliary friction plates 8 do not contact the raised structure in the middle of the stepped displacement track 6. By contacting the secondary sliding plate 7 with the raised position of the stepped displacement track 6, friction damping is further provided to realize the working state of the first stage, and then the secondary sliding plate 7 drives the secondary friction plate 8 to move, so that the secondary friction plate 8 moves to the raised position of the stepped displacement track 6, and the motion contact state of the secondary sliding plate 7 and the stepped displacement track 6 is converted into the second stage, so that the secondary friction plate 8 comes into contact with the stepped displacement track 6, and at the same time, under the pre-tightening force of the compression disc spring 5, the secondary friction plate 8 begins to generate friction damping force, that is, the additional friction damping force under the second-order displacement, and then the main sliding plate 2 is reset, so that the secondary friction plate 8 follows the secondary sliding plate 7 to reset, and the secondary friction plate 8 is separated from the stepped displacement track 6 and restored to the initial state.

[0018] An inertia resistance assembly 9 is disposed within the primary sliding plate 2 and is configured to resist the secondary friction plate 8. The inertia resistance assembly 9 includes an inertia bar 91, which is slidably mounted within the primary sliding plate 2 via a spring 92. A resistance bar 93 is disposed at the outer end of the inertia bar 91, which penetrates the primary sliding plate 2 and is fixed to the secondary friction plate 8. The inertia bar 91 is symmetrically disposed about the secondary sliding plate 7, and the outer ends of the inertia bar 91 and the resistance bar 93 are designed to be inclined. Depending on the amplitude, the inertial force generated is different. When the main sliding plate 2 moves, the inertia bar 91 collides with the inclined surface of the resistance bar 93 under inertia, pushing the resistance bar 93 toward the secondary friction plate 8, pushing the secondary friction plate 8 to contact the protrusion of the stepped displacement track 6 more tightly.

[0019] Working principle: When vibration occurs, the main sliding plate 2 moves according to the vibration direction, and long-term friction damping is generated between the main friction plate 3 and the constraint plate 1. At the same time, the secondary sliding plate 7 contacts the raised position of the step-displacement track 6, further providing friction damping to realize the working state of the first stage, and then the secondary sliding plate 7 drives the secondary friction plate 8 to move, so that the secondary friction plate 8 moves to the raised position of the step-displacement track 6, and the motion contact state of the secondary sliding plate 7 and the step-displacement track 6 is converted into the second stage, so that the secondary friction plate 8 comes into contact with the step-displacement track 6. At the same time, under the pre-tightening force of the compression disc spring 5, the secondary friction plate 8 begins to generate friction damping force, that is, additional friction damping force under the second-order displacement, and then the main sliding plate 2 is reset, so that the secondary friction plate 8 follows the secondary sliding plate 7 to reset, and the secondary friction plate 8 is separated from the step-displacement track 6 and restored to the initial state; Depending on the amplitude, the inertial force generated is different. When the main sliding plate 2 moves, the inertia bar 91 collides with the inclined surface of the resistance bar 93 under inertia, pushing the resistance bar 93 toward the secondary friction plate 8, pushing the secondary friction plate 8 to contact more tightly with the protrusion of the stepped displacement track 6, thereby increasing the friction resistance. That is, the greater the inertial force, the greater the distance that the resistance bar 93 pushes the secondary friction plate 8, and the higher the friction resistance it provides. The output is graded according to the stage displacement stroke to achieve accurate output of friction damping force.

[0020] Any content not described in detail in this specification is prior art known to those skilled in the art. In the description of the present invention, unless otherwise specified, "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings and are intended solely for ease of description and simplification. They do not indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation and are therefore not to be construed as limiting the present invention. Furthermore, terms such as "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise specified or limited, the terms "connected" and "connected" are to be understood broadly, meaning, for example, fixedly connected, detachably connected, or integrally connected; mechanically connected, electrically connected; directly connected, or indirectly connected through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention on a case-by-case basis.

[0021] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A two-stage friction damper, comprising a constraint plate (1), main sliding plates (2) being mounted on both sides of the constraint plate (1), and a main friction plate (3) being fixed on the inner wall of the main sliding plate (2); Its characteristics are: It also includes a fastener, which is used to fasten and install the restraining plate (1) and the main sliding plate (2); A stepped displacement track (6) is sleeved on the left side of the constraint plate (1), and auxiliary sliding plates (7) are provided on the front and rear sides of the stepped displacement track (6). The auxiliary sliding plates (7) are fixed to the inner wall cavity of the main sliding plate (2), and auxiliary friction plates (8) are fixed on both sides of the auxiliary sliding plate (7); An inertia conflict component (9) is provided in the main sliding plate (2), and the inertia conflict component (9) is used to conflict with the secondary friction plate (8).

2. A dual-stage friction damper according to claim 1, characterized in that: The main friction plate (3) is made of rubber material, and the main friction plate (3) is in contact with the front and rear sides of the constraint plate (1).

3. The dual-stage friction damper according to claim 2, characterized in that: The fastener comprises a clamping bolt (4) and a clamping disc spring (5); the clamping bolt (4) is installed between the two main sliding plates (2) and the constraint plate (1); and a clamping disc spring (5) is provided between the clamping bolt (4) and the main sliding plate (2).

4. The dual-stage friction damper according to claim 3, characterized in that: The clamping bolts (4) are distributed at equal intervals on the main sliding plate (2), and there is a movable space for the clamping bolts (4) within the main sliding plate (2) and the constraint plate (1).

5. The dual-stage friction damper according to claim 4, characterized in that: A protrusion structure is provided in the middle of the stepped displacement track (6), and the protrusion in the middle of the stepped displacement track (6) is in conflict with the auxiliary sliding plate (7).

6. The dual-stage friction damper according to claim 5, characterized in that: The auxiliary friction plates (8) are symmetrically distributed on both sides of the auxiliary sliding plate (7), and in an initial state, the auxiliary friction plates (8) do not contact the central protrusion of the stepped displacement track (6).

7. The dual-stage friction damper according to claim 6, characterized in that: The inertia resistance assembly (9) comprises an inertia bar (91), the inertia bar (91) being slidably mounted in the main sliding plate (2) via a spring (92), and a resistance bar (93) being provided at the outer end of the inertia bar (91) for resistance, the resistance bar (93) passing through the main sliding plate (2) and being fixed to the secondary friction plate (8).

8. The dual-stage friction damper according to claim 7, characterized in that: The inertia bar (91) is symmetrically arranged with respect to the auxiliary sliding plate (7), and the outer end of the inertia bar (91) and the outer end of the interference bar (93) are designed as inclined surface structures.

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