Viscous damper

Abstract

The viscous damper comprises a round cylinder, the top end of the round cylinder is in threaded connection with a sealing cover, a piston block is connected into the round cylinder in a sliding mode, a movable rod is fixed to the top face of the piston block, the top end of the movable rod penetrates through the sealing cover, the movable rod is connected with the piston block in a sliding mode, and a throttling hole is formed in the top face of the piston block. An anti-loosening mechanism used for preventing the sealing cover from loosening is arranged on the circular barrel, a mounting groove is formed in the inner circumferential wall of the circular barrel, a sealing ring is fixed to the inner bottom wall of the mounting groove, and a sealing ring plate is fixed to the bottom face of the sealing cover. According to the viscous damper, the piston block is driven to move through the movable rod, throttling resistance can be generated when fluid passes through the throttling hole, then the damping and anti-seismic effects are achieved, the sealing cover is in threaded connection with the circular barrel, so that the sealing cover is convenient to disassemble and assemble, the damper is disassembled, then the fluid is replaced, and an inner cavity of the circular barrel, the piston block and the movable rod are maintained; and the damping and anti-seismic effects of the damper in subsequent use are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of viscous dampers, in particular to a viscous damper. Background Art

[0002] The viscous damper is made based on the principle of fluid movement, especially the throttling resistance generated when the fluid passes through the throttling hole. It is a damper related to the speed of piston movement and is widely used in high-rise buildings, bridges, seismic retrofitting of building structures, vibration resistance of industrial pipeline equipment, military industry and other fields.

[0003] For example, a Chinese patent (publication number: CN210739231 U) discloses a viscous damper, comprising an outer cylinder with left and right axial directions, an oil chamber coaxially provided in the outer cylinder, a piston coaxially provided in the oil chamber and movable left and right, U-shaped channels with left and right axial directions and connected to the oil chamber are respectively provided on the upper and lower sides of the outer cylinder, the two U-shaped channel openings are opposite and their lengths are equal to the length of the oil chamber, an annular groove located outside the oil chamber is coaxially provided in the outer cylinder, a swivel that can rotate forward and backward is coaxially provided in the annular groove, the two U-shaped channels are respectively separated from the middle by the swivel, a plurality of speed regulating channels of different sizes coaxial with the U-shaped channels on the corresponding sides are respectively provided on the upper and lower sides of the swivel, and the diameter of the U-shaped channel is not less than the maximum diameter of the speed regulating channel; this structure is simple, easy to operate, novel in conception and strong in practicality.

[0004] However, the above search patent still has some shortcomings. The damper is not easy to disassemble, which is not conducive to the replacement of deteriorated fluid and the maintenance of the piston and cavity in subsequent use. It is inconvenient to use. Therefore, a viscous damper is proposed to solve the above problems. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides a viscous damper having the advantages of being easy to maintain and repair, and solves the problem that the damper disclosed in the above-mentioned search patent is not easy to maintain and repair.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a viscous damper, comprising a circular cylinder, a sealing cover being threadedly connected to the top of the circular cylinder, a piston block being slidably connected inside the circular cylinder, a movable rod being fixed to the top surface of the piston block, the top of which passes through the sealing cover and being slidably connected thereto, a throttling hole being provided on the top surface of the piston block, an anti-loosening mechanism being provided on the circular cylinder for preventing the sealing cover from loosening, an installation groove being provided on the inner circumferential wall of the circular cylinder, a sealing ring being fixed on the inner bottom wall of the installation groove, and a sealing ring plate being fixed to the bottom surface of the sealing cover.

[0007] Furthermore, the anti-loosening mechanism includes an elastic sheet fixed on the top surface of the circular cylinder, a limiting block is fixed on the side of the elastic sheet facing the movable rod, a movable groove is provided on the bottom surface of the sealing cover, and a limiting groove connected to the movable groove is provided inside the sealing cover and between the movable groove and the movable rod.

[0008] Furthermore, the anti-loosening mechanism also includes a magnet ring slidably connected to the outer peripheral wall of the sealing cover, a guide block is fixed on the inner peripheral wall of the magnet ring, a guide groove for the guide block to be slidably connected is opened on the outer peripheral wall of the sealing cover, and a spring is fixed on the bottom surface of the guide block.

[0009] Furthermore, the top surface of the circular cylinder is open, the sealing cover is a circular plate, the top surface of the sealing cover is provided with a movable hole for the movable rod to pass through, and the top end of the movable rod and the bottom surface of the circular cylinder are both fixed with mounting hole plates.

[0010] Furthermore, the bottom surface of the sealing ring plate contacts and squeezes the sealing ring, and thread grooves are provided on the outer peripheral wall of the sealing ring plate and the inner peripheral wall of the circular cylinder near the top, and the two thread grooves are adapted to each other.

[0011] Furthermore, the elastic sheet is a metal sheet, and a plurality of the elastic sheets are provided and are evenly distributed along the circumferential direction of the circular cylinder. The movable groove and the limit groove are both grooves of annular structure. When the elastic sheet is in a vertical shape, the limit block is located in the limit groove.

[0012] Furthermore, the guide groove is used for the guide block to slide up and down inside the guide groove, and the top surfaces of the elastic sheet and the limit block are both inclined surfaces, and the mid-vertical line of the inclined surface is inclined toward the movable rod.

[0013] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0014] When the viscous damper is in use, the piston block is driven to move by the movable rod. When the fluid passes through the throttling hole, throttling resistance is generated to achieve the shock-absorbing and anti-vibration effect. The sealing cover is threadedly connected to the circular cylinder to facilitate disassembly and assembly. In subsequent use, the damper can be disassembled to replace the fluid and the inner cavity of the circular cylinder, the piston block and the movable rod can be maintained to ensure the shock-absorbing and anti-vibration effect of the damper in subsequent use. After the maintenance is completed and the damper is assembled, the sealing cover can be locked by the anti-loosening mechanism to prevent the threaded connection of the damper from loosening when it vibrates. The stability is better and it is more convenient to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0016] Figure 2 It is a front cross-sectional schematic diagram of the circular cylinder of the utility model;

[0017] Figure 3 For this utility model Figure 2 The enlarged schematic diagram of point A in the middle;

[0018] Figure 4 For this utility model Figure 3 A magnified schematic diagram of point B in the middle.

[0019] In the figure: 1 circular cylinder, 2 sealing cover, 3 piston block, 4 movable rod, 5 throttle hole, 6 anti-loosening mechanism, 601 elastic sheet, 602 limit block, 603 movable groove, 604 limit groove, 605 magnet ring, 606 guide block, 607 guide groove, 608 spring, 7 mounting groove, 8 sealing ring, 9 sealing ring plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-2 The viscous damper of the present embodiment comprises a circular cylinder 1, a sealing cover 2 is threadedly connected to the top of the circular cylinder 1, a piston block 3 is slidably connected to the circular cylinder 1, a movable rod 4 is fixed to the top surface of the piston block 3, and a throttling hole 5 is opened on the top surface of the piston block 3. When in use, the piston block 3 is driven to move by the movable rod 4. When the fluid passes through the throttling hole 5, throttling resistance is generated to achieve shock absorption and anti-vibration effect. The sealing cover 2 is threadedly connected to the circular cylinder 1 to facilitate disassembly and assembly, so that the damper can be disassembled and the fluid can be replaced during subsequent use, and the inner cavity of the circular cylinder 1, the piston block 3, and the movable rod 4 can be maintained to ensure the shock absorption and anti-vibration effect of the subsequent use of the damper. An anti-loosening mechanism 6 for preventing the sealing cover 2 from loosening is provided on the circular cylinder 1. After the maintenance is completed and the assembly is performed, the sealing cover 2 can be locked by the anti-loosening mechanism 6 to prevent the damper from loosening due to vibration, so as to improve stability and be more convenient for popularization and use.

[0022] See also Figure 2-3, a mounting groove 7 is provided on the inner circumferential wall of the circular cylinder 1, a sealing ring 8 is fixed on the inner bottom wall of the mounting groove 7, a sealing ring plate 9 is fixed on the bottom surface of the sealing cover 2, the bottom surface of the sealing ring plate 9 contacts and squeezes the sealing ring 8, and a threaded groove is provided on the outer circumferential wall of the sealing ring plate 9 and the inner circumferential wall of the circular cylinder 1 near the top, and the two threaded grooves are adapted to each other. After the maintenance and overhaul of the damper is completed, the piston block 3 is placed in the circular cylinder 1, and then the sealing cover 2 is rotated to drive the sealing ring plate 9 at the bottom to rotate, and the threaded groove on the outer circumferential wall of the sealing ring plate 9 is adapted to the threaded groove inside the circular cylinder 1, thereby achieving the effect of threaded connection so that the sealing cover 2 is fixed to the top end of the circular cylinder 1. At this time, the bottom surface of the sealing ring plate 9 moves down and cooperates with the mounting groove 7 to squeeze the sealing ring 8 to achieve a sealing effect, thereby preventing the fluid from leaking from the connection between the sealing cover 2 and the circular cylinder 1.

[0023] The top surface of the circular cylinder 1 is open, and the sealing cover 2 is a circular plate. The top surface of the sealing cover 2 is provided with a movable hole for the movable rod 4 to pass through. It should be noted that a sealing structure is installed in the movable hole to prevent fluid leakage. The sealing structure can be a sealing gasket seal or a sealing packing seal. Both are mature and public technologies in the prior art and are common knowledge to technicians in this field. Therefore, this application no longer describes the seal between the movable rod 4 and the sealing cover 2 in detail. The top of the movable rod 4 and the bottom surface of the circular cylinder 1 are fixed with mounting hole plates.

[0024] See also Figure 4 In this embodiment, the anti-loosening mechanism 6 includes an elastic sheet 601 fixed on the top surface of the circular cylinder 1, and a limiting block 602 is fixed on the side of the elastic sheet 601 facing the movable rod 4. When the sealing cover 2 is installed, the sealing cover 2 moves downward, which causes the elastic sheet 601 to be inserted into the movable groove 603 and bends it to the side away from the movable rod 4. A movable groove 603 is provided on the bottom surface of the sealing cover 2, and a limiting groove 604 connected to the movable groove 603 is provided in the sealing cover 2 and between the movable groove 603 and the movable rod 4. Further, when the sealing cover 2 is installed in place, the limiting block 602 is flush with the limiting groove 604. At this time, the elastic sheet 601 is restored to make the limiting block 602 snap into the limiting groove 604, so as to achieve the effect of limiting the upward movement of the sealing cover 2, and the threaded connection of the sealing ring plate 9 is cooperated to perform a stable installation and fixation, so as to avoid the damper from loosening the threaded connection when vibrating, and the stability is better.

[0025] The elastic sheet 601 is a metal sheet. The elastic sheet 601 is provided with multiple pieces that are equidistantly distributed along the circumferential direction of the circular cylinder 1. The movable groove 603 and the limit groove 604 are both grooves of annular structure. Such a structure allows the elastic sheet 601 to still move in 603 when the sealing cover 2 rotates, thereby preventing the movable groove 603 and the elastic sheet 601 from limiting the rotation of the sealing cover 2 when the sealing cover 2 is not in contact with the circular cylinder 1. When the elastic sheet 601 is vertical, the limit block 602 is located in the limit groove 604. The top surfaces of the elastic sheet 601 and the limit block 602 are both inclined surfaces, and the midline of the inclined surfaces is inclined toward the movable rod 4. Such a structure allows the elastic sheet 601 to bend toward the side away from the movable rod 4 through the inclined surface when the sealing cover 2 is installed, without the need to manually bend the elastic sheet 601, thereby improving the convenience of installation.

[0026] See also Figure 4 In this embodiment, the anti-loosening mechanism 6 also includes a magnet ring 605 slidably connected to the outer peripheral wall of the sealing cover 2, and a guide block 606 is fixed on the inner peripheral wall of the magnet ring 605. A guide groove 607 for the guide block 606 to be slidably connected is provided on the outer peripheral wall of the sealing cover 2. The guide groove 607 is used for the guide block 606 to slide up and down inside it. When the sealing cover 2 needs to be removed, the magnet ring 605 is lowered to drive the guide block 606 to slide down inside the guide groove 607. When the magnet ring 605 moves down to be flush with the elastic sheet 601, the elastic sheet 601 is attracted by magnetic force to bend to the side away from the movable rod 4, so that the limit block 602 is separated from the limit groove 604, and the sealing cover 2 can be rotated for removal. A spring 608 is fixed to the bottom surface of the guide block 606. When the guide block 606 moves down, the spring 608 will be compressed. When the sealing cover 2 is installed, the guide block 606 is pushed by the spring 608 to drive the magnet ring 605 to move up, so that the elastic sheet 601 loses its attraction and recovers.

[0027] The working principle of the above embodiment is:

[0028] (1) After the maintenance and overhaul of the damper is completed, the piston block 3 is placed into the circular cylinder 1, and then the sealing cover 2 is rotated to drive the sealing ring plate 9 at the bottom to rotate. The threaded groove on the outer peripheral wall of the sealing ring plate 9 is matched with the threaded groove inside the circular cylinder 1, thereby achieving the effect of threaded connection to fix the sealing cover 2 on the top of the circular cylinder 1. At this time, the bottom surface of the sealing ring plate 9 moves downward to cooperate with the installation groove 7 to squeeze the sealing ring 8 to achieve a sealing effect, thereby preventing fluid from leaking from the connection between the sealing cover 2 and the circular cylinder 1.

[0029] (2) When the sealing cover 2 is installed, the sealing cover 2 moves downward, causing the elastic sheet 601 to be inserted into the movable groove 603 and bend it toward the side away from the movable rod 4. Further, when the sealing cover 2 is installed in place, the limit block 602 is flush with the limit groove 604. At this time, the elastic sheet 601 is restored to cause the limit block 602 to be stuck into the limit groove 604, thereby achieving the effect of limiting the upward movement of the sealing cover 2. The threaded connection of the sealing ring plate 9 is used to ensure stable installation and fixation. When the sealing cover 2 needs to be removed, the magnet ring 605 is lowered to drive the guide block 606 to slide down in the guide groove 607 and compress the spring 608. When the magnet ring 605 moves downward to be flush with the elastic sheet 601, the elastic sheet 601 is attracted by magnetic force to bend it toward the side away from the movable rod 4, thereby causing the limit block 602 to be separated from the limit groove 604 and the sealing cover 2 can be rotated for removal.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A viscous damper, comprising a circular cylinder (1), characterized in that: The top end of the circular cylinder (1) is threadedly connected to a sealing cover (2), a piston block (3) is slidably connected inside the circular cylinder (1), a movable rod (4) is fixed on the top surface of the piston block (3), the top end of the movable rod passing through the sealing cover (2) and being slidably connected thereto, a throttling hole (5) is provided on the top surface of the piston block (3), an anti-loosening mechanism (6) for preventing the sealing cover (2) from loosening is provided on the circular cylinder (1), a mounting groove (7) is provided on the inner peripheral wall of the circular cylinder (1), a sealing ring (8) is fixed on the inner bottom wall of the mounting groove (7), and a sealing ring plate (9) is fixed on the bottom surface of the sealing cover (2).

2. A viscous damper according to claim 1, characterized in that: The anti-loosening mechanism (6) comprises an elastic sheet (601) fixed on the top surface of the circular cylinder (1); a limiting block (602) is fixed on the side of the elastic sheet (601) facing the movable rod (4); a movable groove (603) is provided on the bottom surface of the sealing cover (2); and a limiting groove (604) connected to the movable groove (603) is provided inside the sealing cover (2) and between the movable groove (603) and the movable rod (4).

3. A viscous damper according to claim 2, characterized in that: The anti-loosening mechanism (6) also includes a magnet ring (605) slidably connected to the outer peripheral wall of the sealing cover (2), a guide block (606) is fixed on the inner peripheral wall of the magnet ring (605), a guide groove (607) for the guide block (606) to be slidably connected is opened on the outer peripheral wall of the sealing cover (2), and a spring (608) is fixed on the bottom surface of the guide block (606).

4. A viscous damper according to claim 1, characterized in that: The top surface of the circular cylinder (1) is open, the sealing cover (2) is a circular plate, the top surface of the sealing cover (2) is provided with a movable hole for the movable rod (4) to pass through, and the top end of the movable rod (4) and the bottom surface of the circular cylinder (1) are both fixed with mounting hole plates.

5. A viscous damper according to claim 1, characterized in that: The bottom surface of the sealing ring plate (9) contacts the sealing ring (8) and squeezes the sealing ring (8). The outer peripheral wall of the sealing ring plate (9) and the inner peripheral wall of the circular cylinder (1) near the top are both provided with thread grooves, and the two thread grooves are adapted to each other.

6. A viscous damper according to claim 3, characterized in that: The elastic sheet (601) is a metal sheet. A plurality of the elastic sheets (601) are provided and are evenly distributed along the circumferential direction of the circular cylinder (1). The movable groove (603) and the limiting groove (604) are both grooves of annular structures. When the elastic sheet (601) is in a vertical shape, the limiting block (602) is located in the limiting groove (604).

7. A viscous damper according to claim 3, characterized in that: The guide groove (607) is used for the guide block (606) to slide up and down inside the guide groove. The top surfaces of the elastic sheet (601) and the limit block (602) are both inclined surfaces, and the mid-vertical line of the inclined surface is inclined toward the movable rod (4).

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