Multi-order viscous damper

Abstract

The utility model relates to the technical field of viscous dampers, in particular to a multi-step viscous damper which comprises a column casing, an opening is formed in the top of the column casing, a partition plate is fixedly installed at the position, close to the bottom, in the column casing, a plunger is arranged over the column casing, an opening is formed in the middle of the partition plate, and the plunger penetrates through the opening and extends into the column casing below the partition plate. Damping liquid is filled in the column casing above and below the partition plate, a fixing ring plate is fixedly mounted on the outer side of the bottom of the plunger below the partition plate, the outer wall of the fixing ring plate abuts against the inner wall of the column casing, a plurality of second through holes are formed in the fixing ring plate at equal intervals, and the damping liquid below the partition plate is located below the fixing ring plate. The additional damping area is arranged below the plunger and matched with the plunger above the partition plate and damping of the damping liquid to form at least two stages of damping, when the damping above the partition plate cannot absorb all vibration, the vibration continues to be transmitted downwards, then the damping liquid conducts delayed damping through the first through hole in the fixing ring plate, and the stepped damping effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to viscous damper technical field, concretely relates to a multi-stage viscous damper. BACKGROUND

[0002] Damper is the device that provides the resistance of movement, and reduces the energy of movement. Damper is also called damping device. In order to make the device increase damping when the vibration caused by impact is quickly attenuated. Damper has oil damper, viscous damper, air damper and friction damper.

[0003] At present, viscous damper has a chamber or multiple chambers, and the damping effect of multiple chambers is generally greater than that of one chamber. However, no matter how many chambers, the damping liquid in all chambers is synchronized to vibrate and absorb when damping, without step effect, so that it cannot provide slow damping when small vibration and strong damping effect when large vibration. UTILITY MODEL CONTENT

[0004] The utility model discloses in order to realize the above-mentioned purpose specifically adopts the following technical scheme:

[0005] A multi-stage viscous damper, including the cylinder, the cylinder top is opened, and the fixed mounting of the baffle is arranged in the cylinder inside near the bottom position, and the plunger is arranged at the top of the cylinder, and the baffle is opened in the middle, and the plunger passes through the opening and extends to the cylinder below the baffle, and the baffle above and below the cylinder are all filled with damping liquid, and the fixed ring plate is fixedly installed on the bottom outside of the plunger bottom below the baffle, and the fixed ring plate outer wall abuts against the cylinder inner wall, and a plurality of through holes two are formed in the fixed ring plate, and the damping liquid below the baffle is located below the fixed ring plate.

[0006] Further, the bottom fixed plate is fixedly installed at the bottom of the cylinder, the top fixed plate is fixedly installed at the top of the plunger, and the dustproof sleeve is installed between the top of the cylinder and the top fixed plate. The fixed plate provides the installation position of the damper, the dustproof sleeve is used for preventing dust and other foreign matters from falling into the damping liquid, the dustproof sleeve can adopt cloth cover or rubber sleeve, when the rubber sleeve is adopted, corrugation can be arranged on the rubber sleeve to adapt to the vibration of the plunger.

[0007] Further, the notch is preinstalled at the bottom of the plunger, the convex ring is fixedly installed at the corresponding notch position in the bottom of the cylinder, the spring is fixedly installed in the cylinder inside the convex ring, and the both ends of the spring abut against the corresponding position of the cylinder and the plunger. The spring is used for resetting the position of the fixed ring plate, and the spring also has certain damping effect.

[0008] Further, the annular inner recess is preinstalled on the plunger above the baffle. The annular inner recess increases the contact area of the damping liquid and the plunger, and the inner recess can increase the viscous effect of the damping liquid on the plunger.

[0009] Further, the outer wall of the cylinder is fixed with a plurality of positioning bars one at equal intervals, the top fixed plate bottom is fixed with a positioning bar two corresponding to each positioning bar one position, the positioning bar two and the positioning bar one are provided with corresponding sliding grooves, and the positioning bolt is installed in the sliding groove between the positioning bar two and the positioning bar one. The positioning bar assists in fixing the cylinder and the plunger, so that the relative position is fixed, and displacement is avoided.

[0010] Further, the inner side of the convex ring is fixed with a sleeve, the spring is located outside the sleeve, a plurality of through holes one are formed at equal intervals on the sleeve near the bottom position, the piston is installed in the sleeve, the connecting rod is fixed vertically on the bottom of the top fixed plate corresponding to the piston position, and the bottom end of the connecting rod is movably extended into the sleeve and fixed with the piston. When the piston is driven by the connecting rod to move up and down in the sleeve, part of the damping liquid and air below the fixed ring plate is synchronously discharged or sucked, and the discharging movement can also provide certain damping effect.

[0011] Further, the outer side of the cylinder is fixedly installed with a plurality of equal-interval heat dissipation fins, and the heat dissipation fins are positionally staggered with the positioning bar one and the positioning bar two. The heat dissipation fins increase the contact area of the cylinder and air, and further improve the natural heat dissipation efficiency of the cylinder.

[0012] Further, the top of the heat dissipation fin is provided with a plurality of equal-interval convex ribs. The convex ribs increase the passing time of airflow on the surface of the heat dissipation fin and the passing contact surface, and further can improve the heat dissipation effect.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model sets an additional damping area below the plunger, matches the damping of the plunger and the damping liquid above the partition plate, forms at least two stages of damping, when the damping above the partition plate cannot absorb all the vibration, the vibration continues to be transmitted downward, and then the damping liquid hinders through the through hole one on the fixed ring plate, so that the step damping effect is good.

[0015] 2. The utility model sets a spring at the bottom of the plunger, which is convenient for resetting the fixed ring plate, and can also bear part of the shock absorption, so that three-stage damping shock absorption effect is formed.

[0016] 3. The utility model sets a sleeve and a piston, the plunger vibration drives the piston to move, so that the damping liquid and air in and out of the sleeve are hindered to reduce the shock, and four-stage damping shock absorption effect is formed.

[0017] 4. The utility model sets heat dissipation fins on the cylinder, improves the natural heat dissipation efficiency of the cylinder, and the convex ribs on the heat dissipation fins help to take away more heat on the heat dissipation fins when the air flows, so that the heat dissipation effect is ensured. DRAWINGS

[0018] Figure 1 is a perspective view of the utility model;

[0019] Figure 2 is a bottom view of the utility model;

[0020] Figure 3 is an enlarged view of A in the utility model;

[0021] Figure 4 is a setting schematic view of the radiating fin in the utility model;

[0022] Figure 5 is a fixing schematic view of the radiating fin and the cylinder in the utility model;

[0023] Figure 6 is a perspective view of the radiating fin in the utility model.

[0024] Reference signs: 1, cylinder; 2, plunger; 3, dustproof cover; 4, bottom fixed plate; 5, top fixed plate; 6, positioning strip one; 7, positioning strip two; 8, sliding groove; 9, positioning bolt; 10, notch; 11, convex ring; 12, spring; 13, sleeve; 14, through hole one; 15, connecting rod; 16, piston; 17, partition plate; 18, fixed ring plate; 19, through hole two; 20, annular inner recess; 21, radiating fin; 22, convex rib. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be described clearly and completely below in combination with the drawings in the utility model embodiment.

[0026] The application provides a kind of multi-order viscous damper, mainly solve the problem that existing viscous damper does not have sub-order damping, and provides the following technical scheme, will be combined with Figure 1 Figure 6 Detailed description:

[0027] A kind of multi-order viscous damper, including cylinder 1, cylinder 1 top opening, cylinder 1 is fixedly installed with partition plate 17 in bottom position inside, cylinder 1 is provided with plunger 2 directly above, partition plate 17 middle opening, plunger 2 passes through opening and extends to the cylinder 1 below partition plate 17, partition plate 17 and plunger 2 are sealed by sliding seal, partition plate 17 above and the cylinder 1 below are all equipped with damping liquid, the damping liquid of this embodiment selects medium or high viscosity silicone damping liquid;

[0028] ​The bottom outer side of the plunger 2 below the partition plate 17 is fixedly provided with a fixed ring plate 18, the outer wall of the fixed ring plate 18 abuts against the inner wall of the cylinder 1, a plurality of through holes two 19 are formed in the fixed ring plate 18 at equal intervals, the damping liquid below the partition plate 17 is located below the fixed ring plate 18, and the bottom fixed plate 4 is fixedly installed at the bottom of the cylinder 1.

[0029] In use, the damper is installed from the positions of the top fixed plate 5 and the bottom fixed plate 4 respectively, and it is necessary to ensure that the damper is installed horizontally, that is, the cylinder 1 and the plunger 2 are always in a vertical state and cannot be installed obliquely, especially upside down, wherein the top fixed plate 5 is fixed with the vibration member, and when the vibration member vibrates to drive the top fixed plate 5 and the plunger 2 to vibrate, the plunger 2 vibrates, the vibration force is first transmitted to the damping liquid above the partition plate 17, the viscosity of the plunger 2 is absorbed by the damping liquid, and then the mechanical energy of vibration is converted into heat energy and dissipated, thereby forming damping shock absorption;

[0030] When the vibration is large and the vibration displacement of the plunger 2 increases, the fixed ring plate 18 contacts the damping liquid in the cylinder 1 below, the fixed ring plate 18 extrudes the damping liquid below, and at the same time, the damping liquid flows to the fixed ring plate 18 above through the through holes two 19, and the damping liquid absorbs the vibration through the hysteresis of the through holes two 19, thereby forming two-stage damping shock absorption.

[0031] In some embodiments, the bottom of the plunger 2 is pre-provided with a notch 10, the cylinder 1 in the bottom is fixedly provided with a convex ring 11 at a position corresponding to the notch 10, a spring 12 is fixed in the cylinder 1 inside the convex ring 11, and the both ends of the spring 12 abut against the cylinder 1 and the plunger 2 at corresponding positions.

[0032] When the damping liquid passes through the through holes two 19, the amount of damping liquid below the fixed ring plate 18 decreases, in order to guarantee the subsequent damping effect, the damping liquid above needs to flow downward when the fixed ring plate 18 is separated from the damping liquid, for damping shock absorption next time, when the vibration force is small, the damping liquid above the partition plate 17 can absorb the vibration, the spring 12 originally compressed by vibration can be stretched and reset, the entire plunger 2 is pushed upward, the fixed ring plate 18 is separated from the damping liquid, and the damping liquid above the fixed ring plate 18 can flow to the below through the through holes two 19, when the next strong vibration occurs, the spring 12 is compressed by vibration, the fixed ring plate 18 extrudes the damping liquid again, thereby forming a reciprocating cycle of damping shock absorption, and the spring 12 can also be used for damping shock absorption, thereby forming third-stage damping shock absorption.

[0033] In some embodiments, an annular inner recess 20 is pre-provided on the plunger 2 above the partition plate 17, and a dustproof sleeve 3 is installed between the top of the cylinder 1 and the top fixed plate 5.

[0034] The annular inner recess 20 is used to increase the contact area of the damping liquid with the plunger 2, thereby improving the viscous effect of the damping liquid and improving the damping effect. The dust cover 3 is used to prevent dust and other impurities from falling into the damping liquid and affecting the damping of the plunger 2.

[0035] In some embodiments, the outer wall of the cylinder 1 is fixed with a plurality of equally spaced positioning bars one 6. The bottom of the top fixed plate 5 is fixed with a positioning bar two 7 corresponding to the position of each positioning bar one 6. The positioning bar two 7 and the positioning bar one 6 are provided with mutually corresponding sliding grooves 8. The positioning bolt 9 is installed in the sliding groove 8 between the positioning bar two 7 and the positioning bar one 6.

[0036] When the plunger 2 vibrates, the vibration direction is uncertain, but due to the fixed relationship between the plunger 2 and the partition plate 17, the plunger 2 is limited to only up and down vibration. The positioning bar two 7 and the positioning bar one 6 are arranged to increase the up and down vibration limiting effect of the plunger 2. The positioning bolt 9 is fixed in a semi-tight manner without the need for tightening, thereby avoiding the inactivity of the plunger 2.

[0037] In some embodiments, the inner side of the convex ring 11 is fixed with a sleeve 13 inside the cylinder 1. The spring 12 is located outside the sleeve 13. A plurality of through holes one 14 are provided at equal intervals on the bottom of the sleeve 13. The piston 16 is installed in the sleeve 13. The connecting rod 15 is fixed vertically on the bottom of the top fixed plate 5 corresponding to the position of the piston 16. The bottom end of the connecting rod 15 is movably extended into the sleeve 13 and fixed with the piston 16.

[0038] When the plunger 2 vibrates up and down, the connecting rod 15 will be pressed down by the top fixed plate 5, thereby pressing the piston 16 to move down in the sleeve 13. The air and damping liquid below the piston 16 in the sleeve 13 are discharged through the through hole one 14, so that the damping liquid enters below the fixed ring plate 18, which can increase the damping strength of the fixed ring plate 18. When the plunger 2 moves up, the piston 16 moves up, and part of the damping liquid and air below the fixed ring plate 18 is sucked into the sleeve 13 through the through hole one 14 to form a reset. In combination with the damping liquid above the partition plate 17, the fixed ring plate 18 and the spring 12, a fourth stage damping is formed.

[0039] In some embodiments, a plurality of equally spaced heat dissipation fins 21 are fixedly installed on the outer side of the cylinder 1. The heat dissipation fins 21 are staggered with the positioning bar one 6 and the positioning bar two 7. The top of the heat dissipation fin 21 is provided with a plurality of equally spaced convex ribs 22.

[0040] The heat dissipation fin 21 is fixed with the cylinder 1, which can absorb the heat on the cylinder 1, increase the heat dissipation contact area of the cylinder 1 and the air, thereby improving the heat dissipation efficiency, converting the heat energy of the damping liquid mechanical energy to the outside, maintaining the viscosity of the damping liquid, and ensuring the reliable damping effect. The plurality of convex ribs 22 make the surface of the heat dissipation fin 21 uneven, thereby increasing the air passing time and the contact surface, and thereby improving the heat dissipation effect.

[0041] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-stage viscous damper, comprising a cylindrical tube (1), characterized in that, The top of the column (1) is open, and a partition (17) is fixedly installed in the bottom position of the column (1). A plunger (2) is set directly above the column (1). The partition (17) has an opening in the middle. The plunger (2) passes through the opening and extends into the column (1) below the partition (17). The column (1) above and below the partition (17) is filled with damping fluid. A fixing ring plate (18) is fixedly installed on the outer side of the bottom of the plunger (2) below the partition (17). The outer wall of the fixing ring plate (18) abuts against the inner wall of the column (1). Multiple through holes (19) with equal spacing are opened on the fixing ring plate (18). The damping fluid below the partition (17) is located below the fixing ring plate (18).

2. The multi-stage viscous damper according to claim 1, characterized in that, The bottom of the cylinder (1) is fixedly installed with a bottom fixing plate (4), the top of the plunger (2) is fixedly installed with a top fixing plate (5), and a dust cover (3) is installed between the top of the cylinder (1) and the top fixing plate (5).

3. A multi-stage viscous damper according to claim 1, characterized in that, The plunger (2) has a pre-set notch (10) at the bottom. A convex ring (11) is fixedly installed in the bottom of the cylinder (1) corresponding to the notch (10). A spring (12) is fixed in the cylinder (1) inside the convex ring (11). The two ends of the spring (12) abut against the cylinder (1) and the plunger (2) at the corresponding positions.

4. A multi-stage viscous damper according to claim 3, characterized in that, The plunger (2) above the partition (17) has a pre-set annular recess (20).

5. A multi-stage viscous damper according to claim 2, characterized in that, The outer wall of the column (1) is fixed with multiple positioning strips (6) at equal intervals. The bottom of the top fixing plate (5) is fixed with positioning strips (7) corresponding to the position of each positioning strip (6). The positioning strips (7) and positioning strips (6) are provided with corresponding sliding grooves (8). Positioning bolts (9) are installed in the sliding grooves (8) between positioning strips (7) and positioning strips (6).

6. A multi-stage viscous damper according to claim 3, characterized in that, A sleeve (13) is fixed inside the cylindrical tube (1) inside the inner side of the convex ring (11). A spring (12) is located outside the sleeve (13). Multiple through holes (14) with equal spacing are opened on the sleeve (13) near the bottom. A piston (16) is installed inside the sleeve (13). A connecting rod (15) is fixed at the bottom of the top fixing plate (5) vertically corresponding to the position of the piston (16). The bottom end of the connecting rod (15) extends movably into the sleeve (13) and is fixed to the piston (16).

7. A multi-stage viscous damper according to claim 1, characterized in that, Multiple heat sinks (21) with equal spacing are fixedly installed on the outer side of the column (1). The heat sinks (21) are offset from the positions of positioning strip one (6) and positioning strip two (7).

8. A multi-stage viscous damper according to claim 7, characterized in that, The top of the heat sink (21) is provided with a plurality of equally spaced protruding ribs (22).

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