A friction damper capable of automatically relieving friction

Abstract

The application discloses a friction damper capable of automatically releasing friction force, which comprises a friction seat and a friction block fixedly connected with each other, wherein the friction seat comprises a first supporting surface and a first friction surface arranged oppositely, and the friction block comprises a second supporting surface and a second friction surface arranged oppositely; the first supporting surface and the second supporting surface are pressed against each other; the first friction surface above the friction seat is pressed upward, the second friction surface below the friction block is pressed downward, so that the friction damper generates friction force upward and downward as a whole; when the friction block receives horizontal force from the bottom to the top of the second supporting surface, the friction block is displaced, the first supporting surface and the second supporting surface are disengaged, the first friction surface above the friction seat eliminates the upward pressing force, the second friction surface below the friction block eliminates the downward pressing force, and thus the friction force generated by the friction damper is released.

Description

Technical Field

[0001] The invention relates to the field of door and window equipment, and in particular to a friction damper capable of automatically releasing friction. Background Art

[0002] Currently available window dampers on the market, such as CN215213052U, feature a damper-equipped door and window, including a mounting frame and a window sash. One side of the window sash is pivotally connected to the mounting frame via a hinge, and the bottom of the window sash is provided with a damper that mates with the mounting frame. This invention offers advantages over existing technologies in that the damper allows the window sash to be positioned at any angle, preventing it from swinging sideways when opened. This improves the user experience while also preventing the sash from colliding with the mounting frame due to its random swinging.

[0003] This type of window damper still generates friction when the fire window closer is closing, hindering the window closer from closing, making it more difficult to close the window or even making it impossible to close the window. Therefore, a window damper that can automatically eliminate friction when the window closer is working is needed. Summary of the Invention

[0004] In order to overcome the above-mentioned disadvantages of the prior art, an object of the present invention is to provide a window damper which can automatically release the friction force when the window closer is working.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] It includes a friction seat and a friction block fixedly connected to each other, the friction seat includes a first supporting surface and a first friction surface arranged opposite to each other, and the friction block includes a second supporting surface and a second friction surface arranged opposite to each other, the first supporting surface and the second supporting surface press each other and make the first friction surface and the second friction surface move away from each other; the friction block and the friction seat can release the mutual pressure of the first supporting surface and the second supporting surface when subjected to a thrust in a specific direction, thereby releasing the friction force of the friction damper on the first friction surface and the second friction surface.

[0007] By adopting the above technical solution, with the first friction surface at the top and the second friction surface at the bottom, the first support surface and the second support surface press against each other, so that the first friction surface above the friction seat applies pressure upward, and the second friction surface below the friction block applies pressure downward, so that the friction damper as a whole generates friction forces at the top and bottom. When the friction block receives a horizontal force from the bottom direction to the top direction of the second support surface, the friction block displaces, and the first support surface and the second support surface are released from contact. The first friction surface above the friction seat eliminates the upward pressure force, and the second friction surface below the friction block eliminates the downward pressure force, thereby releasing the friction force generated by the friction damper.

[0008] As an improved solution, the first supporting surface is inclined relative to the first friction surface, and the second supporting surface is inclined relative to the second friction surface, and the first supporting surface and the second supporting surface are in contact with each other; it also includes a locking block, and the friction seat is provided with a locking mouth matching the locking block, and the locking block is arranged against the locking mouth facing the side of the friction block, and the friction block is supported by the locking block to push the second supporting surface away from the first supporting surface.

[0009] As an improved solution, the first supporting surface and / or the second supporting surface is provided with anti-slip grooves.

[0010] By adopting the above technical solution, the first supporting surface and the second supporting surface are pressed against each other, and the friction block and the friction seat are fixedly connected by relying on the friction force generated by the anti-slip grooves abutting each other. When the horizontal force received by the friction block from the bottom direction to the top direction of the second supporting surface is greater than the friction force, the friction block can be separated from the friction seat, thereby releasing the friction force generated by the friction damper.

[0011] As an improved solution, the first supporting surface is tilted relative to the first friction surface, the second supporting surface is tilted relative to the second friction surface, and the first supporting surface and the second supporting surface are in contact with each other; the friction block (2) is capable of pushing the second supporting surface away from the first supporting surface when subjected to a thrust in a specific direction; and further comprises a blocking block, which applies force to the friction block in the horizontal direction and causes the second supporting surface to abut against the first supporting surface, and the friction seat is provided with a blocking port that matches the blocking block, and the blocking port prevents the blocking block from passing when the force applied to the blocking block in the horizontal direction is less than a set value.

[0012] By adopting the above technical solution, the friction seat blocks the retaining block from moving away from the friction block through the bayonet. The retaining block applies horizontal pressure to the friction block, thereby causing the second support surface of the friction block to press against the first support surface of the friction seat, generating friction between the first and second friction surfaces. When the horizontal force exceeds a certain level, the bayonet causes the retaining block to move away from the friction block through the bayonet, further causing the friction block to lose its horizontal support, the first support surface to move away from the second support surface, and the friction block to separate from the friction seat, thereby releasing the friction force generated by the friction damper.

[0013] As an improved solution, the positioning block is provided with a first blocking protrusion matching the bayonet, and the first blocking protrusion is located on the side of the bayonet facing the friction block in the horizontal direction.

[0014] By adopting the above technical solution, the blocking block is fixed to the friction seat in the horizontal direction through the first blocking protrusion provided on the bayonet.

[0015] As an improved solution, the bayonet includes blocking columns vertically arranged on both sides of the blocking block, and the blocking block is provided with an adjusting bolt that abuts against the friction block.

[0016] By adopting the above technical solution, the bayonet is arranged vertically, and the blocking block can slide freely in the vertical direction. The blocking block is provided with an adjustment bolt that abuts the friction block, which can adjust the horizontal distance between the blocking block and the friction block. Since the blocking block has a fixed horizontal position, it can adjust the horizontal position of the friction block. Due to the interaction between the first support surface and the second support surface, it can adjust the vertical position of the friction seat and the friction block, thereby adjusting the overall friction force of the friction damper.

[0017] As an improved solution, the adjusting bolt is provided with an adjusting end, and the adjusting end is arranged facing the end of the positioning block away from the friction block.

[0018] By adopting the above technical solution, it is convenient to adjust the adjustment bolt using a tool from the side of the friction damper away from the hinge to change the magnitude of the friction force.

[0019] As an improved solution, the friction block is provided with an unlocking protrusion, and the unlocking protrusion protrudes from the end of the friction seat away from the locking block.

[0020] As an improved solution, the friction seat is provided with a corner connecting piece at one end close to the locking block, and the corner connecting piece includes a first connecting segment and a second connecting segment, and the first connecting segment and the second connecting segment are bent and fixedly connected; the first connecting segment is provided with a transfer point rotatably connected to the friction seat, and the second connecting segment is fixedly connected to the hinge of the window sash; the distance from the end of the first connecting segment to the locking block is smaller than the distance from the transfer point to the locking block.

[0021] By adopting the above technical solution, since the distance from the end of the first connecting segment to the locking block is smaller than the distance from the transfer point to the locking block, the locking block breaks through the bayonet and moves toward the corner connecting piece, and will first contact the end of the first connecting segment and apply pressure to it. In conjunction with the rotational connection of the transfer point, the corner connecting piece will continuously exert a component force and torque on the hinge toward the window sash, generating a clamping force to close the window inward, thereby enhancing the tightness of the window sash.

[0022] As an improved solution, the corner connecting piece is in the shape of a right-angled broken line, and the transition point is located between the end of the first connecting segment and the connection between the first connecting segment and the second connecting segment; the second connecting segment is bent from the connection toward the friction block.

[0023] As an improved solution, the friction seat is provided with a shielding piece at one end close to the corner connecting piece, and the shielding piece is provided with an adjustment port that matches the adjustment bolt.

[0024] By adopting the above technical solution, the shielding piece has a shielding and protective effect on the corner connecting piece, and does not affect the adjustment of the friction force by rotating the adjusting bolt.

[0025] As an improved solution, a sandwich plate is sandwiched between the friction seat and the friction block, and the sandwich plate is sandwiched between the first support surface and the second support surface; a pressing bolt is provided on the friction seat or the friction block, and the pressing bolt pushes the sandwich plate away from the friction seat or the friction block, thereby causing the first friction surface and the second friction surface to move away from each other;

[0026] The sandwich plate is provided with a drop hole matching the pressure bolt. When subjected to a thrust in a specific direction, the drop hole is displaced and the pressure bolt falls into it, thereby releasing the mutual pressure between the first support surface and the second support surface.

[0027] By adopting the above technical solution, a pressure bolt is installed on the friction seat. The pressure bolt rotates to push the sandwich panel away from the friction seat. The sandwich panel then pushes the friction block away from the friction seat, achieving the effect of separating the friction block and the friction seat and generating friction. Normally, the pressure bolt presses against the sandwich panel. When the window closer is in operation, the sandwich panel is impacted, and the drop hole of the sandwich panel slides to the position of the pressure bolt, causing the pressure bolt to fall into the drop hole. As a result, the pressure bolt loses its support for the sandwich panel. Due to the loss of support, the sandwich panel and the friction block loosen, and the distance between the friction seat and the friction block decreases, thereby eliminating the friction.

[0028] As an improved solution, it also includes a side limiter arranged on one side of the friction seat and the friction block, the side limiter is provided with a limit card block matching the friction seat and the friction block, the friction seat and the friction block are provided with a limit protrusion on the side in contact with the side limiter, the limit protrusion cooperates with the limit card to make the friction seat and the friction block move synchronously in the horizontal direction; the side limiter is provided with a movable groove matching the sandwich plate, and the sandwich plate is slidably arranged in the movable groove.

[0029] By adopting the above technical solution, the friction seat and the friction block are restricted by the side limiters and can move away from each other in the vertical direction, but maintain synchronous movement in the horizontal direction. At the same time, the side limiters leave movable grooves, allowing the sandwich plate to move freely relative to the friction seat and the friction block in the horizontal direction. Therefore, when the sandwich plate is impacted, it will move horizontally relative to the friction seat and the friction block, slide the drop hole to the position of the top pressure bolt, and then release the friction force, without causing the friction seat and the friction block to move together, resulting in the inability to release the friction force.

[0030] As an improved solution, the friction seat includes two first friction surfaces that are relatively inclined and interconnected, and the friction block includes two second friction surfaces that are relatively inclined and interconnected; the sandwich plate is arranged to be relatively inclined to the first friction surface and the second friction surface.

[0031] Specifically preferably, the friction damper is in the shape of a cubic column as a whole, and is separated along the diagonal of the cross section to form a friction seat and a friction block. The cross section of the friction seat and the friction block is an isosceles right triangle as a whole, and a sandwich plate is provided in the gap in the diagonal direction of the friction damper.

[0032] By adopting the above technical solution, the friction seat and friction block can each press against the external frame / track in two directions, thereby enhancing the friction effect. Similarly, the friction block / friction seat can also be set to various shapes that apply pressure in multiple different directions to improve the friction effect.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] With the first friction surface at the top and the second friction surface at the bottom, the first supporting surface and the second supporting surface press each other, so that the first friction surface above the friction seat presses upward, and the second friction surface below the friction block presses downward, so that the friction damper as a whole generates friction force at the top and bottom. When the friction block receives a horizontal force from the bottom direction to the top direction of the second supporting surface, the friction block displaces, and the first supporting surface and the second supporting surface release the pressure. The first friction surface above the friction seat eliminates the upward pressure, and the second friction surface below the friction block eliminates the downward pressure, thereby releasing the friction force generated by the friction damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is an overall structural diagram of a friction damper capable of automatically releasing friction according to the present invention.

[0036] Figure 2 The figure is a side sectional structural diagram of a friction damper capable of automatically releasing friction according to the present invention.

[0037] Figure 3 This is a structural schematic diagram of the present invention showing the cooperation between a friction damper capable of automatically releasing friction, a corner connecting piece and a hinge.

[0038] Figure 4 This is a structural diagram of a second embodiment of a friction damper capable of automatically releasing friction in accordance with the present invention, in cooperation with a hinge.

[0039] Figure 5 This is a partially enlarged cross-sectional structural diagram of a second embodiment of a friction damper capable of automatically releasing friction according to the present invention, which cooperates with a hinge.

[0040] Figure 6 This is a schematic diagram of the exploded structure of Example 2 of a friction damper capable of automatically releasing friction in accordance with the present invention.

[0041] Figure 7This is a schematic diagram of the exploded structure of Example 3 of a friction damper capable of automatically releasing friction in accordance with the present invention.

[0042] Among them, 1: friction seat; 2: friction block; 3: first supporting surface; 4: second supporting surface; 5: first friction surface; 6: second friction surface; 7: blocking block; 8: first blocking protrusion; 9: second blocking protrusion; 10: blocking column; 11: adjusting bolt; 12: unlocking protrusion; 13: corner connecting piece; 14: first connecting section; 15: second connecting section; 16: transfer point; 17: blocking piece; 18: adjusting port; 19: window closer; 20: hinge; 21: sandwich panel; 22: top pressure bolt; 23: drop hole; 24: side limiter; 25: limiting block; 26: limiting protrusion; 27: movable groove; 28: limiting hole; 29: limiting column. DETAILED DESCRIPTION

[0043] The present invention will now be further described with reference to the accompanying drawings and embodiments:

[0044] The present invention will be further described below with reference to specific examples. It should be understood that the following examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0045] It should be noted that when a component / part is referred to as being "set on" another component / part, it may be directly set on the other component / part or there may also be an intermediate component / part. When a component / part is referred to as being "connected / coupled" to another component / part, it may be directly connected / coupled to the other component / part or there may be an intermediate component / part at the same time. The term "connection / coupling" as used herein may include electrical and / or mechanical physical connections / couplings. The term "includes / comprising" as used herein refers to the presence of a feature, step or component / part, but does not exclude the presence or addition of one or more other features, steps or components / parts. The term "and / or" as used herein includes any and all combinations of one or more relevant listed items.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application. In addition, in the description of this application, the terms "first", "second", etc. are only used to describe purposes and to distinguish similar objects. There is no sequential order between the two, nor can they be understood to indicate or imply relative importance. In addition, in the description of this application, unless otherwise stated, the meaning of "plurality" is two or more.

[0047] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many possible ways to implement the methods, devices, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0048] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0049] The terms used herein are intended only to describe various examples and are not intended to limit the present disclosure. Unless the context clearly indicates otherwise, the singular is intended to include the plural. The terms "comprise," "include," and "have" list the presence of stated features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0050] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include changes in shapes that occur during manufacturing.

[0051] The features of the examples described herein can be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0052] Implementation Case 1:

[0053] As attached Figure 1-3 As shown, a friction damper capable of automatically releasing friction force comprises a friction seat 1 and a friction block 2 fixedly connected to each other, the friction seat 1 comprising a first supporting surface 3 and a first friction surface 5 arranged opposite to each other, the friction block 2 comprising a second supporting surface 4 and a second friction surface 6 arranged opposite to each other, the first supporting surface 3 and the second supporting surface 4 being pressed against each other; the friction block 2 can move the second supporting surface 4 away from the first supporting surface 3 when subjected to a thrust in a specific direction, thereby releasing the friction force of the friction damper on the first friction surface 5 and the second friction surface 6.

[0054] With the first friction surface 5 at the top and the second friction surface 6 at the bottom, the first support surface 3 and the second support surface 4 press against each other, so that the first friction surface 5 above the friction seat 1 presses upward, and the second friction surface 6 below the friction block 2 presses downward, so that the friction damper as a whole generates friction forces at the top and bottom. When the friction block 2 receives a horizontal force from the bottom direction to the top direction of the second support surface 4, the friction block 2 moves, and the first support surface 3 and the second support surface 4 are released from contact. The first friction surface 5 above the friction seat 1 eliminates the upward pressure, and the second friction surface 6 below the friction block 2 eliminates the downward pressure, thereby releasing the friction force generated by the friction damper.

[0055] The first supporting surface 3 and / or the second supporting surface 4 are provided with anti-slip grooves.

[0056] The first supporting surface 3 and the second supporting surface 4 are pressed against each other, and the friction block 2 and the friction seat 1 are fixedly connected by the friction force generated by the anti-slip grooves abutting against each other. When the horizontal force received by the friction block 2 from the bottom direction to the top direction of the second supporting surface 4 is greater than the friction force, the friction block 2 can be separated from the friction seat 1, thereby releasing the friction force generated by the friction damper.

[0057] It also includes a locking block 7, which applies force to the friction block 2 in the horizontal direction and makes the second support surface 4 abut against the first support surface 3. The friction seat 1 is provided with a bayonet that matches the locking block 7. The bayonet prevents the locking block 7 from passing when the force applied to the locking block 7 in the horizontal direction is less than a set value.

[0058] The friction base 1 blocks the retaining block 7 from moving away from the friction block 2 through the bayonet. The retaining block 7 applies horizontal pressure to the friction block 2, causing the second support surface 4 of the friction block 2 to press against the first support surface 3 of the friction base 1, generating friction between the first friction surface 5 and the second friction surface 6. When the horizontal force exceeds a certain level, the bayonet causes the retaining block 7 to move away from the friction block 2 through the bayonet, further depriving the friction block 2 of the horizontal support of the retaining block 7. The mutual pressure between the first support surface 3 and the second support surface 4 is released, thereby relieving the friction force generated by the friction damper. Furthermore, the first support surface 3 may even move away from the second support surface 4, separating the friction block 2 from the friction base 1, thereby relieving the friction force generated by the friction damper.

[0059] The blocking block 7 is provided with a first blocking protrusion 8 and a second blocking protrusion 9 that match the bayonet, and the first blocking protrusion 8 and the second blocking protrusion 9 are respectively located on both sides of the bayonet in the horizontal direction.

[0060] The blocking block 7 is fixed to the friction seat 1 in the horizontal direction through a first blocking protrusion 8 and a second blocking protrusion 9 respectively provided on both sides of the bayonet.

[0061] The bayonet includes blocking columns 10 vertically arranged on both sides of the blocking block 7 , and the blocking block 7 is provided with an adjusting bolt 11 abutting against the friction block 2 .

[0062] The bayonet is arranged vertically, and the locking block 7 can slide freely in the vertical direction. The locking block 7 is provided with an adjustment bolt 11 that abuts against the friction block 2, which can adjust the horizontal distance between the locking block 7 and the friction block 2. Since the locking block 7 is fixed in the horizontal position, it plays the role of adjusting the horizontal position of the friction block 2. Due to the interaction between the first support surface 3 and the second support surface 4, it plays the role of adjusting the vertical position of the friction seat 1 and the friction block 2, thereby adjusting the overall friction force of the friction damper.

[0063] The adjusting bolt 11 is provided with an adjusting end, and the adjusting end is arranged facing the end of the positioning block 7 away from the friction block 2 .

[0064] It is convenient to use a tool to adjust the adjusting bolt 11 from the side of the friction damper away from the hinge to change the friction force.

[0065] The friction block 2 is provided with an unlocking protrusion 12 , and the unlocking protrusion 12 is provided on an end of the friction seat 1 away from the locking block 7 .

[0066] The friction seat 1 is provided with a corner connecting piece 13 at one end close to the locking block 7, and the corner connecting piece 13 includes a first connecting section 14 and a second connecting section 15, and the first connecting section 14 and the second connecting section 15 are bent and fixedly connected; the first connecting section 14 is provided with a transfer point 16 rotatably connected to the friction seat 1, and the second connecting section 15 is fixedly connected to the hinge 20 of the window sash; the distance from the end of the first connecting section 14 to the locking block 7 is less than the distance from the transfer point 16 to the locking block 7.

[0067] Since the distance from the end of the first connecting section 14 to the locking block 7 is smaller than the distance from the transfer point 16 to the locking block 7, the locking block 7 breaks through the bayonet and moves toward the corner connecting piece 13, and will first contact the end of the first connecting section 14 and apply pressure to it. In conjunction with the rotational connection of the transfer point 16, the corner connecting piece 13 continuously exerts a component force and torque on the hinge 20 toward the window sash, generating a pressing force to close the window inward, thereby enhancing the tightness of the window sash.

[0068] The corner connecting piece 13 is in the shape of a right-angled broken line, and the transition point 16 is located between the end of the first connecting section 14 and the connection between the first connecting section 14 and the second connecting section 15; the second connecting section 15 is bent from the connection toward the friction block 2.

[0069] The friction seat 1 is provided with a shielding piece 17 at one end close to the corner connecting piece 13 , and the shielding piece 17 is provided with an adjustment port 18 matching the adjustment bolt 11 .

[0070] The shielding piece 17 shields and protects the corner connecting piece 13 without affecting the rotation of the adjusting bolt 11 to adjust the friction force.

[0071] The working principle of the friction damper in conjunction with the window closer 19 to relieve friction is as follows:

[0072] like Figure 1-3 As shown, normally, the second support surface 4 of the friction block 2 abuts against the first support surface 3 of the friction seat 1. The locking block 7 fixed to the bayonet exerts horizontal pressure on the friction block 2 via the adjusting bolt 11, causing the friction block 2 to move to the left of the first support surface 3. Due to the cooperation between the first support surface 3 and the second support surface 4, the friction block 2 moves to the upper left and applies friction force to the second friction surface 6 above, while the friction seat 1 applies friction force to the first friction surface 5 below.

[0073] When the window closer 19 moves from left to right, it strikes the unlocking protrusion 12 of the friction block 2 and pushes the first blocking protrusion 8 of the locking block 7 past the blocking column 10 of the bayonet. At this time, the locking block 7 is no longer blocked by the bayonet of the friction seat 1 and moves to the right. The friction block 2 loses the support of the adjusting bolt 11 and moves to the right. The second supporting surface 4 leaves the first supporting surface 3. The lower first friction surface 5 and the upper second friction surface 6 lose their pressure in the upper and lower directions respectively, and the friction damper releases friction.

[0074] The principle of friction damper adjusting friction force is:

[0075] Normally, the second support surface 4 of the friction block 2 rests against the first support surface 3 of the friction seat 1. The locking block 7, fixed to the bayonet, applies horizontal pressure to the friction block 2 via the adjusting bolt 11. When the adjusting bolt 11 is rotated to increase the horizontal distance between the locking block 7 and the friction block 2, the friction block 2 is pushed to the left and upward under the action of the first support surface 3, increasing the pressure on the second friction surface 6 above and the friction force. Similarly, the friction seat 1 is affected by the second support surface 4, increasing the pressure on the first friction surface 5 below and the friction force. Conversely, when the adjusting bolt 11 is rotated to reduce the horizontal distance between the locking block 7 and the friction block 2, the pressure on the first friction surface 5 and the second friction surface 6 is reduced, reducing the friction force.

[0076] The interaction principle between the friction damper and the corner connecting piece 13 when the window is closed by the window closer 19 is as follows:

[0077] When the window closer 19 moves from left to right, it strikes the unlocking protrusion 12 of the friction block 2 and pushes the first blocking protrusion 8 of the locking block 7 past the blocking post 10 of the locking mechanism. Now, freed from the locking mechanism of the friction base 1, the locking block 7 moves rightward, contacting the end of the first connecting segment 14 of the corner connecting piece 13 and exerting a rightward thrust. Because the corner connecting piece 13 is rotationally connected to the friction base 1 at the transition point 16, the rightward thrust applied to the end of the first connecting segment 14 passes through the transition point 16, imparting a counterclockwise rotational force to the second connecting segment 15. This forces the hinge 20 connected to the second connecting segment 15, and thus the window sash, inward, tightening the window sash.

[0078] Implementation Case 2:

[0079] As attached Figure 4-6 As shown, a friction damper that can automatically release friction, the right end of the friction damper is connected to the window sash through a series of mechanisms including racks, gears, and hinges. The friction damper is set in a shell and can slide left and right along the shell. On the left side of the friction damper is a window closing mechanism including a storage spring and a locking block.

[0080] When the window closing mechanism is triggered, the locking block is driven by the storage spring to hit the friction damper from left to right.

[0081] The friction damper comprises a friction seat 1 at the top, a friction block 2 at the bottom, and a sandwich plate 21 positioned between the friction seat 1 and the friction block 2. The friction seat 1 has a threaded hole extending vertically through it, with a pressure bolt 22 installed within the hole. The pressure bolt 22 presses downward against the sandwich plate 21, which in turn presses downward against the friction block 2, causing the friction seat 1 to push upward against the outer shell, while the friction block 2 pushes downward against the outer shell, generating friction. The left end of the sandwich plate 21 protrudes beyond the left ends of the friction seat 1 and friction block 2 and is able to move freely horizontally relative to the friction seat 1 and friction block 2.

[0082] When the window closing mechanism is triggered, the locking block rushes rightward, first colliding with the left end of sandwich panel 21, causing sandwich panel 21 to move rightward. Sandwich panel 21 is provided with a drop hole 23, normally located to the left of pressure bolt 22. As sandwich panel 21 moves rightward, drop hole 23 moves directly below pressure bolt 22, allowing pressure bolt 22 to fall into drop hole 23. This releases pressure from pressure bolt 22 on sandwich panel 21, eliminating the mutual pressure between friction seat 1 and friction block 2. Friction seat 1 moves downward, and friction block 2 moves upward, both losing pressure on the outer shell and eliminating friction on the outer shell.

[0083] A side limiter 24 is provided between the side surfaces of the friction seat 1 and the friction block 2 and the outer shell. The side limiter 24 is provided with a limit card block 25. The limit card block 25 is vertically arranged. The friction seat 1 and the friction block 2 are provided with a limit protrusion 26 that matches the limit card quickly. As shown in the figure, the left and right limit cards 25 sandwich the limit protrusion 26 in the middle, so that the friction seat 1 and the friction block 2 can move freely up and down, and move synchronously when moving left and right.

[0084] On the other hand, a movable groove 27 is left on the limit block 25, and the movable groove 27 is arranged horizontally to facilitate the flexible horizontal movement of the sandwich plate 21 arranged in the movable groove 27 relative to the friction seat 1. In this way, when the sandwich plate 21 is hit from left to right, it will not drive the friction seat 1 / friction block 2 to move, but will move freely to the right relative to the friction seat 1 / friction block 2, moving the drop hole 23 to below the top pressure bolt 22.

[0085] As shown in the figure, the sandwich plate 21 is provided with a retaining hole 28, and the friction seat 1 / friction block 2 is provided with a retaining post 29 that extends into the retaining hole 28. This retaining post 29 is relatively fragile and serves to maintain the horizontal stability of the friction seat 1, friction block 2, and sandwich plate 21 during installation of the friction damper, preventing misalignment and improving installation efficiency. Due to the relative fragility of the retaining post 29, it can be directly broken by the impact when the window closer is closed, without affecting the friction damper's ability to release friction.

[0086] Implementation Case 3:

[0087] As attached Figure 7 As shown, its structure is similar to that of the second implementation case, except that:

[0088] The friction damper is in the shape of a cubic column as a whole, and is separated along the diagonal of the cross section to form a friction seat 1 and a friction block 2. The cross section of the friction seat and the friction block is an isosceles right triangle as a whole, and a sandwich plate is set in the gap in the diagonal direction of the friction damper.

[0089] By adopting the above technical solution, the friction seat and the friction block can each press the external frame / track in two directions, thereby enhancing the friction effect.

[0090] In summary, after reading the present invention document, ordinary technicians in this field can make various other corresponding transformation schemes based on the technical solutions and technical concepts of the present invention without creative mental work, and different application scenarios all fall within the scope of protection of the present invention.

Claims

1. A friction damper capable of automatically releasing friction, characterized in that: The invention comprises a friction seat (1) and a friction block (2) fixedly connected to each other, wherein the friction seat (1) comprises a first supporting surface and a first friction surface (5) arranged opposite to each other, and the friction block (2) comprises a second supporting surface and a second friction surface (6) arranged opposite to each other, wherein the first supporting surface and the second supporting surface exert pressure on each other and move the first friction surface and the second friction surface away from each other; and the friction damper can release the mutual pressure between the first supporting surface and the second supporting surface when subjected to a thrust in a specific direction, thereby releasing the friction force of the friction damper on the first friction surface (5) and the second friction surface (6); A sandwich plate is sandwiched between the friction seat (1) and the friction block (2), and the sandwich plate is sandwiched between the first support surface and the second support surface; a pressing bolt is provided on the friction seat (1) or the friction block (2) through a threaded hole, and the pressing bolt protrudes from the friction seat (1) or the friction block (2) to press the sandwich plate (21), so that the first friction surface and the second friction surface are separated from each other; The sandwich plate is provided with a drop hole matching the top pressure bolt. When subjected to a thrust in a specific direction, the drop hole is displaced and the portion of the top pressure bolt protruding from the friction seat (1) or the friction block (2) enters the drop hole, thereby releasing the top pressure on the sandwich plate and thereby releasing the mutual pressure between the first support surface and the second support surface.

2. The friction damper capable of automatically releasing friction as claimed in claim 1, characterized in that: The invention also includes a side limiter (24) arranged on one side of the friction seat (1) and the friction block (2), the side limiter (24) is provided with a limiter block (25) matching the friction seat (1) and the friction block (2), and the friction seat (1) and the friction block (2) are provided with a limiter protrusion (26) on the side in contact with the side limiter (24), and the limiter protrusion (26) cooperates with the limiter block to enable the friction seat (1) and the friction block (2) to move synchronously in the horizontal direction.

3. The friction damper capable of automatically releasing friction as claimed in claim 1, characterized in that: The friction seat (1) comprises two first friction surfaces (5) that are relatively inclined and connected to each other, and the friction block (2) comprises two second friction surfaces (6) that are relatively inclined and connected to each other; the sandwich plate (21) is arranged to be relatively inclined to the first friction surface (5) and the second friction surface (6).

4. The friction damper capable of automatically releasing friction as claimed in claim 1, characterized in that: The sandwich plate (21) is provided with a limiting hole (28), and the friction seat (1) or the friction block (2) is provided with a limiting column (29) extending into the limiting hole (28). The limiting column (29) blocks the sandwich plate (21) by pressing the limiting hole (28), thereby preventing the sandwich plate (21) from being triggered by mistake.

5. The friction damper capable of automatically releasing friction as claimed in claim 1, characterized in that: The first supporting surface is tilted relative to the first friction surface, the second supporting surface is tilted relative to the second friction surface, and the first supporting surface and the second supporting surface are in contact with each other; the friction seat (1) further comprises a latch block (7), the friction seat (1) is provided with a latch matching the latch block (7), the latch block (7) is arranged against the latch facing the side of the friction block (2), and the latch block (7) supports the friction block (2) to push the first friction surface (5) away from the second friction surface (6).

6. The friction damper capable of automatically releasing friction as claimed in claim 5, characterized in that: The positioning block (7) is provided with a first blocking protrusion (8) matching the bayonet, and the first blocking protrusion (8) is located on a side of the bayonet facing the friction block in the horizontal direction.

7. The friction damper capable of automatically releasing friction as claimed in claim 6, characterized in that: The bayonet comprises blocking columns (10) vertically arranged on both sides of the blocking block (7); the blocking block (7) is provided with an adjusting bolt (11) abutting against the friction block (2); The adjusting bolt (11) is provided with an adjusting end, and the adjusting end is arranged facing the end of the positioning block (7) away from the friction block (2).

8. The friction damper capable of automatically releasing friction as claimed in claim 5, characterized in that: The friction block (2) is provided with an unlocking protrusion (12), and the unlocking protrusion (12) is arranged to protrude from one end of the friction seat (1) away from the locking block (7).

9. The friction damper capable of automatically releasing friction as claimed in claim 5, characterized in that: The friction seat (1) is provided with a corner connecting piece (13) at one end close to the positioning block (7), and the corner connecting piece (13) includes a first connecting section (14) and a second connecting section (15), and the first connecting section (14) and the second connecting section (15) are bent and fixedly connected; the first connecting section (14) is provided with a transfer point (16) rotatably connected to the friction seat (1), and the second connecting section (15) is fixedly connected to the hinge of the window sash; the distance from the end of the first connecting section (14) to the positioning block (7) is smaller than the distance from the transfer point (16) to the positioning block (7); the corner connecting piece (13) is in the shape of a right-angled broken line, and the transfer point (16) is located between the end of the first connecting section (14) and the connection between the first connecting section (14) and the second connecting section (15); the second connecting section (15) is bent from the connection toward the friction block (2).

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