Viscous damper with adjustable damping force

Abstract

The utility model discloses a viscous damper with adjustable damping force, which comprises a cylinder barrel, damping media are filled in the cylinder barrel, a piston rod is horizontally sleeved in the cylinder barrel in a sliding manner, a piston is fixedly sleeved at the position of the piston rod in the cylinder barrel, and the piston is sleeved in the cylinder barrel. A plurality of protective valve assemblies are uniformly arranged on the piston; the adjusting valve assembly is arranged, when damping force parameters need to be adjusted, the vertical position of the blocking needle is adjusted under the action of the threads by rotating the adjusting knob, so that the opening size of the oil passing hole can be changed, the damping force parameters can be adjusted, disassembly is not needed, and the damping device is more practical. The two valve plates can be attached to each other through force provided by the springs, in this way, the transverse barrel is sealed, when the vibration intensity is too large and exceeds a threshold value, the spring on one side can be compressed, the two valve plates are separated, and in this way, damping media flow to the side with the small pressure through the transverse holes, and the damper is protected.

Description

Technical Field

[0001] This utility model relates to the field of viscous damper technology, specifically a viscous damper with adjustable damping force. Background Technology

[0002] Viscous dampers are widely used in the domestic construction industry, especially in earthquake-prone areas. Due to varying seismic fortification intensities across regions, viscous dampers are designed with different parameters for each specific project. Once the damper's parameters are determined, its output force is only related to velocity. Currently, viscous dampers are relatively mature. For example, invention patent CN110822004B discloses a viscous damper comprising: a piston cylinder containing a damping medium; and a piston disposed within the piston cylinder and capable of sliding along its length within the cylinder. Current viscous dampers have the following drawbacks:

[0003] The damping force parameters of current viscous dampers are inconvenient to adjust. After the damper parameters are determined, the product is assembled and tested. If the maximum damping force test result is unqualified, the product needs to be disassembled for adjustment, which is time-consuming and labor-intensive.

[0004] To address this issue, we propose a viscous damper with adjustable damping force. Utility Model Content

[0005] The purpose of this invention is to provide a viscous damper with adjustable damping force to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a viscous damper with adjustable damping force, comprising a cylinder, wherein the cylinder is filled with a damping medium, a piston rod is horizontally slidably sleeved inside the cylinder, the piston rod is fixedly sleeved with a piston inside the cylinder, the piston is sleeved inside the cylinder, a plurality of protective valve assemblies are evenly arranged on the piston, the top surface of the cylinder is fixedly connected to and connected to both ends of a secondary pipe, and an adjusting valve assembly is arranged in the middle of the secondary pipe;

[0007] The regulating valve assembly includes a valve body, which is fixedly connected to the middle of the secondary pipe. A horizontal oil passage is opened inside the valve body, connecting to the secondary pipe. A valve cavity is opened at the lower part of the valve body, connected to the oil passage. A stop pin is movably sleeved inside the valve cavity. A clamping nut is threadedly connected to the top of the valve body. An adjusting knob is rotatably sleeved on the clamping nut. A hexagonal post is fixedly connected to the bottom end of the adjusting knob. A hexagonal opening is opened at the top of the stop pin, and the hexagonal post slidably sleeves the hexagonal opening. An internal thread is opened at the top of the valve cavity. An external thread is fixedly connected to the periphery of the top of the stop pin, and the external thread is threadedly connected to the internal thread.

[0008] Preferably, the bottom end of the stop pin is tapered, a sealing ring is fixedly sleeved around the stop pin, and a retaining spring is engaged on the adjusting knob below the clamping nut.

[0009] Preferably, the protective valve assembly includes a horizontal cylinder, which is fixedly sleeved on the piston. Two end rings are fixedly connected to both ends of the horizontal cylinder. Two end blocks are arranged at the middle of the two end rings. Multiple support rods are fixed between the periphery of the end blocks and the inner side of the end rings. A sliding rod is horizontally arranged between the two end blocks.

[0010] Preferably, a limiting block is fixedly connected to the middle of the slide rod, and two sliding sleeves are horizontally slidably sleeved on both sides of the sliding rod at the position of the limiting block. Two valve plates are fixedly sleeved on the two sliding sleeves, and the valve plates are slidably sleeved in the horizontal cylinder. The two valve plates are in contact with each other, and multiple horizontal holes are evenly opened on each valve plate. The horizontal holes on the two valve plates are staggered.

[0011] Preferably, the sliding sleeve has a limiting opening on the side near the sliding rod, the limiting opening is fitted with a limiting block, the sliding sleeve is fixedly connected to a spring on the side near the end block, the end of the spring is snapped into the side wall of the end block, two hexagonal plugs are fixedly connected to both ends of the sliding rod, the side wall of the end block has a hexagonal socket, and the hexagonal plugs are inserted into the hexagonal socket.

[0012] Preferably, a first guide sleeve is fixedly sleeved at one end of the cylinder, and a second guide sleeve is fixedly sleeved at the other end of the cylinder. The first guide sleeve and the second guide sleeve are slidably sleeved on the piston rod. A first lug is fixedly connected to the end of the piston rod near the first guide sleeve, and a connecting pipe is fixedly connected to the end of the cylinder near the second guide sleeve. A second lug is fixedly connected to the end of the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention features an adjusting valve assembly. When the damping force parameter needs adjustment, rotating the adjusting knob causes the stop pin to adjust to a vertical position under the action of the thread. This changes the opening and closing size of the oil passage, thus adjusting the damping force parameter without disassembly, making it more practical. Under normal conditions, the force provided by the spring keeps the two valve plates in contact, thus sealing the cross cylinder. When the vibration intensity exceeds the threshold, the spring on one side will compress, causing the two valve plates to separate. This allows the damping medium to flow through the cross hole to the side with lower pressure, protecting the damper. Attached Figure Description

[0015] Figure 1 These are schematic diagrams of the main body structure in the first and second embodiments of this utility model;

[0016] Figure 2 These are schematic diagrams of the cross-sectional structure of the main body in the first and second embodiments of this utility model;

[0017] Figure 3 These are cross-sectional structural diagrams of the regulating valve assembly in the first and second embodiments of this utility model;

[0018] Figure 4 This is a cross-sectional view of the protective valve assembly in the second embodiment of the present invention.

[0019] In the diagram: 1. Cylinder; 2. Piston rod; 3. Piston; 4. Secondary pipe; 5. Damping medium; 6. Regulating valve assembly; 7. Protective valve assembly; 8. First guide sleeve; 9. Second guide sleeve; 10. Connecting pipe; 11. First lug; 12. Second lug; 61. Valve body; 62. Oil passage hole; 63. Valve cavity; 64. Stop pin; 65. Clamping nut; 66. Adjusting knob; 67. Hexagonal column; 68. Hexagonal opening; 69. Internal thread; 610. External thread; 611. Snap ring; 612. Sealing ring; 71. Horizontal cylinder; 72. End ring; 73. Support rod; 74. End block; 75. Slide rod; 76. Limiting block; 77. Sliding sleeve; 78. Valve plate; 79. Limiting port; 710. Spring; 711. Hexagonal socket; 712. Hexagonal insert; 713. Horizontal hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Example 1:

[0022] Please see Figure 1-3 This utility model provides a technical solution: a viscous damper with adjustable damping force, including a cylinder 1, the cylinder 1 is filled with a damping medium 5, a piston rod 2 is horizontally slidably sleeved inside the cylinder 1, the piston rod 2 is fixedly sleeved with a piston 3 inside the cylinder 1, the piston 3 is sleeved inside the cylinder 1, a plurality of protective valve assemblies 7 are evenly arranged on the piston 3, the top surface of the cylinder 1 is fixedly connected to and connected to both ends of a secondary pipe 4, and an adjusting valve assembly 6 is arranged in the middle of the secondary pipe 4;

[0023] The regulating valve assembly 6 includes a valve body 61, which is fixedly connected to the middle of the secondary pipe 4. An oil passage 62 is horizontally opened inside the valve body 61, connecting to the secondary pipe 4. A valve cavity 63 is opened at the lower part of the valve body 61, connected to the oil passage 62. A stop pin 64 is movably sleeved inside the valve cavity 63. A clamping nut 65 is threadedly connected to the top of the valve body 61. An adjusting knob 66 ​​is rotatably sleeved on the clamping nut 65. A hexagonal post 67 is fixedly connected to the bottom end of the adjusting knob 66. A hexagonal opening 68 is opened at the top of the stop pin 64. The angle post 67 is slidably sleeved with the hexagonal opening 68, and the valve cavity 63 has an internal threaded part 69 on the top. The top of the stop pin 64 is fixed to the external threaded part 610, and the external threaded part 610 is threadedly connected to the internal threaded part 69. An adjusting valve assembly 6 is added. When it is necessary to adjust the damping force parameter, by rotating the adjusting knob 66, the stop pin 64 is adjusted to a vertical position under the action of the thread at the stop pin 64. In this way, the opening and closing size of the oil passage 62 will change, and the damping force parameter can be adjusted without disassembly, which is more practical.

[0024] Example 2:

[0025] Please see Figure 1-4 This is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The bottom end of the stop pin 64 is tapered. The sealing ring 612 is fixedly sleeved around the stop pin 64. The adjusting knob 66 ​​is fitted with a snap ring 611 below the clamping nut 65.

[0026] The protective valve assembly 7 includes a horizontal cylinder 71, which is fixedly sleeved on the piston 3. Two end rings 72 are fixedly connected to both ends of the horizontal cylinder 71. Two end blocks 74 are provided in the middle of the two end rings 72. Multiple support rods 73 are fixedly connected between the periphery of the end blocks 74 and the inner side of the end rings 72. A sliding rod 75 is horizontally arranged between the two end blocks 74.

[0027] The sliding rod 75 is fixedly connected to the limiting block 76 in the middle. The sliding rod 75 is horizontally slidably sleeved with two sliding sleeves 77 on both sides of the limiting block 76. Two valve plates 78 are fixedly sleeved on the two sliding sleeves 77. The valve plates 78 are slidably sleeved in the horizontal cylinder 71. The two valve plates 78 are in contact with each other. Multiple horizontal holes 713 are evenly opened on each valve plate 78. The horizontal holes 713 on the two valve plates 78 are staggered.

[0028] A limiting port 79 is opened on the side of the sliding sleeve 77 near the sliding rod 75. The limiting port 79 is fitted with a limiting block 76. A spring 710 is fixedly connected to the side of the sliding sleeve 77 near the end block 74. The end of the spring 710 is engaged with the side wall of the end block 74. Two hexagonal plugs 712 are fixedly connected to both ends of the sliding rod 75. A hexagonal socket 711 is opened on the side wall of the end block 74. The hexagonal plugs 712 are inserted into the hexagonal sockets 711. The function of the protective valve assembly 7 is to protect the damper. When the vibration amplitude is too large and exceeds the damping threshold, it will damage the damper. Under normal conditions, the force provided by the spring 710 will make the two valve plates 78 stick together, so the cross cylinder 71 is sealed. When the vibration intensity is too large and exceeds the threshold, the spring 710 on one side will be compressed, causing the two valve plates 78 to separate. In this way, the damping medium 5 flows through the transverse hole 713 to the side with lower pressure, thus protecting the damper.

[0029] One end of the cylinder 1 is fixedly sleeved with the first guide sleeve 8, and the other end of the cylinder 1 is fixedly sleeved with the second guide sleeve 9. The first guide sleeve 8 and the second guide sleeve 9 are slidably sleeved with the piston rod 2. The piston rod 2 is fixedly connected to the first lug 11 at the end near the first guide sleeve 8, and the cylinder 1 is fixedly connected to the connecting pipe 10 at the end near the second guide sleeve 9. The end of the connecting pipe 10 is fixedly connected to the second lug 12.

[0030] Example 3:

[0031] Please see Figure 1-4 This is the third embodiment of the present invention. Based on the above two embodiments, the present invention provides an adjusting valve assembly 6. When it is necessary to adjust the damping force parameter, by rotating the adjusting knob 66, the stop pin 64 is adjusted to a vertical position under the action of the thread. In this way, the opening and closing size of the oil passage 62 will change, thereby adjusting the damping force parameter without disassembly, which is more practical. Under normal conditions, the force provided by the spring 710 will cause the two valve plates 78 to stick together, so the horizontal cylinder 71 is sealed. When the vibration intensity is too high and exceeds the threshold, the spring 710 on one side will be compressed, causing the two valve plates 78 to separate. In this way, the damping medium 5 flows through the horizontal hole 713 to the side with lower pressure, protecting the damper.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A viscous damper with adjustable damping force, comprising a cylinder (1) filled with a damping medium (5), characterized in that: A piston rod (2) is horizontally slidably sleeved inside the cylinder (1). The piston rod (2) is fixedly sleeved with a piston (3) inside the cylinder (1). The piston (3) is sleeved inside the cylinder (1). Multiple protective valve assemblies (7) are evenly arranged on the piston (3). The top surface of the cylinder (1) is fixedly connected to and connected to both ends of the secondary pipe (4). A regulating valve assembly (6) is arranged in the middle of the secondary pipe (4). The regulating valve assembly (6) includes a valve body (61), which is fixedly connected to the middle of the secondary pipe (4). An oil passage hole (62) is horizontally opened inside the valve body (61), connecting to the secondary pipe (4). A valve cavity (63) is opened at the lower part of the valve body (61), connecting to the oil passage hole (62). A stop pin (64) is movably sleeved inside the valve cavity (63). A clamping nut (64) is threadedly connected to the top of the valve body (61). 5) An adjusting knob (66) is rotatably sleeved on the clamping nut (65). The bottom end of the adjusting knob (66) is fixedly connected to a hexagonal post (67). The top end of the stop pin (64) has a hexagonal opening (68). The hexagonal post (67) is slidably sleeved on the hexagonal opening (68). The top of the valve cavity (63) has an internal thread (69). The periphery of the top end of the stop pin (64) is fixedly connected to an external thread (610). The external thread (610) is threadedly connected to the internal thread (69).

2. The viscous damper with adjustable damping force according to claim 1, characterized in that: The bottom end of the stop pin (64) is tapered, and a sealing ring (612) is fixedly sleeved around the stop pin (64). A retaining ring (611) is snapped onto the adjusting knob (66) below the clamping nut (65).

3. A viscous damper with adjustable damping force according to claim 1, characterized in that: The protective valve assembly (7) includes a horizontal cylinder (71) which is fixedly sleeved on the piston (3). Two end rings (72) are fixedly connected to both ends of the horizontal cylinder (71). Two end blocks (74) are arranged in the middle of the two end rings (72). Multiple support rods (73) are fixedly connected between the periphery of the end blocks (74) and the inner side of the end rings (72). A sliding rod (75) is horizontally arranged between the two end blocks (74).

4. A viscous damper with adjustable damping force according to claim 3, characterized in that: The sliding rod (75) is fixedly connected to the limiting block (76) in the middle. The sliding rod (75) is horizontally slidably sleeved with two sliding sleeves (77) on both sides of the limiting block (76). Two valve plates (78) are fixedly sleeved on the two sliding sleeves (77). The valve plates (78) are slidably sleeved in the cross cylinder (71). The two valve plates (78) are in contact with each other. Multiple horizontal holes (713) are evenly opened on each valve plate (78). The horizontal holes (713) on the two valve plates (78) are staggered.

5. A viscous damper with adjustable damping force according to claim 4, characterized in that: The sliding sleeve (77) has a limiting opening (79) on the side near the sliding rod (75), and the limiting opening (79) is fitted with a limiting block (76). The sliding sleeve (77) has a spring (710) fixedly connected on the side near the end block (74), and the end of the spring (710) is engaged with the side wall of the end block (74). The two ends of the sliding rod (75) are fixedly connected with two hexagonal inserts (712). The side wall of the end block (74) has a hexagonal socket (711), and the hexagonal inserts (712) are inserted into the hexagonal socket (711).

6. A viscous damper with adjustable damping force according to claim 1, characterized in that: One end of the cylinder (1) is fixedly sleeved with a first guide sleeve (8), and the other end of the cylinder (1) is fixedly sleeved with a second guide sleeve (9). The first guide sleeve (8) and the second guide sleeve (9) are slidably sleeved with a piston rod (2). The piston rod (2) is fixedly connected to a first lug (11) at one end near the first guide sleeve (8), and a connecting pipe (10) is fixedly connected to one end of the cylinder (1) near the second guide sleeve (9). The end of the connecting pipe (10) is fixedly connected with a second lug (12).

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