Double-piston viscous damper

Abstract

The utility model relates to the technical field of viscous dampers, and discloses a double-piston viscous damper which comprises a cylinder body, a first end cover and a second end cover are fixedly installed on the two sides of the interior of the cylinder body respectively, damping fluid is filled between the first end cover and the second end cover, and piston rods are transversely arranged on the first end cover and the second end cover in a penetrating mode. A piston body is fixedly connected to the outer wall of the piston rod in a sleeving mode, a plurality of flow guide grooves used for dredging damping fluid are formed in the inner side of the cylinder body in an array mode, and a pressure relief assembly is arranged at a groove opening in one end of each flow guide groove, and when external force acts on the piston rod through the first connecting body, the piston rod drives the piston body to move in the damping fluid; movement of the piston body can be hindered by the damping fluid, so that effective buffering and damping of external force are achieved, the damping fluid can be kept smooth in the flowing process through the design of the flow guide groove and the pressure relief assembly, too high pressure is released when necessary, and stable and safe operation of the damper is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of viscous dampers, and specifically, to a double-piston viscous damper. Background Art

[0002] A double-piston viscous damper, also known as a viscous damper, is an oil cylinder structure filled with a damping medium. Through the reciprocating movement of the piston, the flow of the internal medium is driven to generate a damping effect, and then the kinetic energy is converted into heat energy as an energy-consuming shock-absorbing device.

[0003] There are some drawbacks in the existing devices during use. For example, during actual use, the damping holes in the double-piston viscous damper are the key channels for the flow of the damping medium. When the amplitude of the vibration activity is small, the damping medium can relatively smoothly exchange inside the oil cylinder through these damping holes to meet the damping requirements. However, when the amplitude of the vibration activity increases, the demand for the damping medium increases sharply, but the size of the damping holes does not increase correspondingly. Due to the small size of the damping holes, the exchange rate is limited, which leads to an increase inside the oil cylinder and is prone to the phenomenon of cylinder explosion. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a double-piston viscous damper to solve the problem that when the amplitude of the vibration activity increases, the demand for the damping medium increases sharply, but the size of the damping holes does not increase correspondingly. Due to the small size of the damping holes, the exchange rate is limited, which leads to an increase inside the oil cylinder and is prone to the phenomenon of cylinder explosion.

[0005] The utility model provides the following technical solution: A double-piston viscous damper includes a cylinder body. On both sides inside the cylinder body, a first end cover and a second end cover are respectively fixedly installed. A damping fluid is filled between the first end cover and the second end cover. A piston rod is horizontally penetrated through the first end cover and the second end cover. A piston body is fixedly sleeved on the outer wall of the piston rod. One end of the piston rod located outside the cylinder body is fixedly connected with a first connecting body. One side of the cylinder body far away from the first connecting body is fixedly connected with a fixed rod. One end of the fixed rod far away from the cylinder body is fixedly connected with a second connecting body. A plurality of diversion grooves for guiding the damping fluid are arrayed and opened on the inner side of the cylinder body, and a pressure relief component is arranged at the notch of one end of the plurality of diversion grooves.

[0006] As a preference of the above technical solution, the pressure relief component includes a plug block and a follower ring for blocking the notch of the diversion groove. The follower ring is slidably sleeved on the outer side of the piston rod. A connecting plate is fixedly connected between the follower ring and the plurality of plug blocks. An extrusion rod is fixedly connected to the side of the connecting plate far away from the piston body. A reset component is arranged at one end of the extrusion rod far away from the connecting plate.

[0007] As a preference of the above technical solution, the reset assembly includes an extrusion plate fixedly connected to the extrusion rod. A reset spring is fixedly connected to the side wall of the extrusion plate away from the extrusion rod. A synchronous ring is fixedly connected between multiple extrusion plates. The synchronous ring is slidably sleeved outside the piston rod. A plurality of ejector rods are fixedly arranged in an annular array on the side wall of the piston body close to the extrusion plate. The plurality of ejector rods are used in cooperation with the connecting plate.

[0008] As a preference of the above technical solution, the reset assembly further includes limiting grooves annularly arranged on the inner side wall of the cylinder body. A sliding block is slidably connected in the limiting groove. The ends of the plurality of extrusion plates are fixedly connected to the side walls of the corresponding sliding blocks.

[0009] As a preference of the above technical solution, the reset spring is arranged between the extrusion plate and the second end cover, and the end of the reset spring away from the extrusion plate is fixedly connected to the side wall of the second end cover.

[0010] As a preference of the above technical solution, the piston rod slides horizontally at the centers of the first end cover and the second end cover.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] In the present utility model, when an external force acts on the piston rod through the first connector, the piston rod drives the piston body to move in the damping fluid. Due to the viscosity of the damping fluid, the movement of the piston body will be hindered by the damping fluid, thereby generating a damping force. This damping force will increase as the piston body moves, so as to effectively buffer and damp the external force. The design of the diversion groove and the pressure relief assembly enables the damping fluid to flow smoothly during the flow process and release excessive pressure when necessary, ensuring the stable and safe operation of the damper. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of a double-piston viscous damper;

[0014] Figure 2 is a first sectional structural schematic diagram of a double-piston viscous damper;

[0015] Figure 3 is Figure 2 the enlarged view at A in

[0016] Figure 4 is a second sectional structural schematic diagram of a double-piston viscous damper.

[0017] In the figure: 10, cylinder block; 11, first end cover; 12, second end cover; 13, damping fluid; 14, piston rod; 15, piston body; 16, first connecting body; 17, fixed rod; 18, second connecting body; 19, diversion groove; 20, plugging block; 21, follower ring; 22, connecting plate; 23, extrusion rod; 30, extrusion plate; 31, return spring; 32, synchronizing ring; 33, ejector rod; 34, limiting groove; 35, sliding block. Detailed implementation manners

[0018] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0019] Embodiment

[0020] As Figure 1 and Figure 2 shown, the present invention provides a technical solution: a double-piston viscous damper, including a cylinder block 10, with a first end cover 11 and a second end cover 12 fixedly installed on both sides inside the cylinder block 10 respectively. A damping fluid 13 is filled between the first end cover 11 and the second end cover 12. A piston rod 14 is horizontally penetrated through the first end cover 11 and the second end cover 12. The piston rod 14 slides horizontally at the centers of the first end cover 11 and the second end cover 12. A piston body 15 is fixedly sleeved on the outer wall of the piston rod 14. One end of the piston rod 14 located outside the cylinder block 10 is fixedly connected with a first connecting body 16. One side of the cylinder block 10 away from the first connecting body 16 is fixedly connected with a fixed rod 17. The end of the fixed rod 17 away from the cylinder block 10 is fixedly connected with a second connecting body 18. A plurality of diversion grooves 19 for guiding the damping fluid 13 are arrayed and opened on the inner side of the cylinder block 10, and a pressure relief component is arranged at the notch of one end of the plurality of diversion grooves 19. In the specific use process, when an external force acts on the piston rod 14 through the first connecting body 16, the piston rod 14 drives the piston body 15 to move in the damping fluid 13. Due to the viscosity of the damping fluid 13, the movement of the piston body 15 will be hindered by the damping fluid 13, thereby generating a damping force. This damping force will increase as the piston body 15 moves, so as to effectively buffer and damp the external force. At the same time, the design of the diversion grooves 19 and the pressure relief component enables the damping fluid 13 to flow smoothly during the flow process and release excessive pressure when necessary, ensuring the stable and safe operation of the damper.

[0021] As an implementation manner in this embodiment, as Figure 2 , Figure 3 and Figure 4As shown in the figure, the pressure relief component includes a plugging block 20 for plugging the notch of the diversion groove 19 and a follower ring 21. The follower ring 21 is slidably sleeved outside the piston rod 14. A connecting plate 22 is fixedly connected between the follower ring 21 and the plurality of plugging blocks 20. A pressing rod 23 is fixedly connected to the side of the connecting plate 22 away from the piston body 15. A reset component is arranged at one end of the pressing rod 23 away from the connecting plate 22. The reset component includes a pressing plate 30 fixedly connected to the pressing rod 23. A reset spring 31 is fixedly connected to the side wall of the pressing plate 30 away from the pressing rod 23. The reset spring 31 is arranged between the pressing plate 30 and the second end cover 12, and one end of the reset spring 31 away from the pressing plate 30 is fixedly connected to the side wall of the second end cover 12. A synchronous ring 32 is fixedly connected between the plurality of pressing plates 30. The synchronous ring 32 is slidably sleeved outside the piston rod 14. A plurality of ejector rods 33 are fixedly arranged in a circular array on the side wall of the piston body 15 close to the pressing plate 30. The plurality of ejector rods 33 are used in cooperation with the connecting plate 22. The reset component further includes a limiting groove 34 formed in a circular array on the inner side wall of the cylinder block 10. A sliding block 35 is slidably connected in the limiting groove 34. The ends of the plurality of pressing plates 30 are fixedly connected to the side walls of the corresponding sliding blocks 35. During the specific use process, when the damper is in a normal working state and the piston rod 14 is not affected by an external force, the plugging block 20 closely fits at the notch of the diversion groove 19 under the action of the reset spring 31 to prevent the flow of the damping fluid 13. When an external force acts on the piston rod 14 and makes it move to one side, the piston body 15 also moves accordingly. The piston body 15 drives the ejector rods 33 to move synchronously. When the pressure of the damping fluid 13 is too high, the ejector rods 33 on the piston body 15 will contact the connecting plate 22 and push the connecting plate 22 and the pressing rod 23 to move to one side as the piston rod 14 continues to move. Since the pressing rod 23 is fixedly connected to the pressing plate 30, the pressing plate 30 will compress the reset spring 31 and drive the synchronous ring 32 and the sliding block 35 to move together. At the same time, the movement of the connecting plate 22 will drive the plugging block 20 away from the notch of the diversion groove 19, allowing the damping fluid 13 to flow smoothly, and part of the pressure is released through the diversion groove 19 to protect the damper from damage. When the external force disappears or the piston rod 14 moves in the reverse direction, the elastic force of the reset spring 31 will reset the pressing plate 30, the pressing rod 23 and the connecting plate 22. The reset of the connecting plate 22 will drive the plugging block 20 to fit again at the notch of the diversion groove 19 to prevent the further flow of the damping fluid 13.

[0022] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it.

Claims

1. A dual-piston viscous damper, comprising a cylinder (10), characterized in that: A first end cover (11) and a second end cover (12) are fixedly installed on both sides of the cylinder body (10), and a damping fluid (13) is filled between the first end cover (11) and the second end cover (12). A piston rod (14) is transversely penetrated on the first end cover (11) and the second end cover (12), and a piston body (15) is fixedly sleeved on the outer wall of the piston rod (14). The end of the piston rod (14) located outside the cylinder body (10) is fixedly connected to a first connecting body (16). A fixing rod (17) is fixedly connected to a side of the cylinder body (10) away from the first connecting body (16), and an end of the fixing rod (17) away from the cylinder body (10) is fixedly connected to a second connecting body (18). A plurality of guide grooves (19) for guiding the damping fluid (13) are arranged in an array on the inner side of the cylinder body (10), and a pressure relief assembly is arranged at the notch at one end of the plurality of guide grooves (19).

2. A dual-piston viscous damper according to claim 1, characterized in that: The pressure relief assembly comprises a blocking block (20) and a follower ring (21) for blocking the notch of the guide groove (19); the follower ring (21) is slidably sleeved on the outside of the piston rod (14); a connecting plate (22) is fixedly connected between the follower ring (21) and the plurality of blocking blocks (20); a squeeze rod (23) is fixedly connected to the side of the connecting plate (22) away from the piston body (15); and a reset assembly is arranged at one end of the squeeze rod (23) away from the connecting plate (22).

3. A dual-piston viscous damper according to claim 2, characterized in that: The reset assembly comprises an extrusion plate (30) fixedly connected to an extrusion rod (23); a reset spring (31) is fixedly connected to a side wall of the extrusion plate (30) away from the extrusion rod (23); a synchronization ring (32) is fixedly connected between the plurality of extrusion plates (30); the synchronization ring (32) is slidably sleeved on the outside of the piston rod (14); a plurality of ejector rods (33) are fixed in an annular array on a side wall of the piston body (15) close to the extrusion plate (30); and the plurality of ejector rods (33) are used in conjunction with the connecting plate (22).

4. A dual-piston viscous damper according to claim 3, characterized in that: The reset assembly further comprises a ring-shaped array of limiting grooves (34) formed on the inner wall of the cylinder body (10), wherein a sliding block (35) is slidably connected in the limiting groove (34), and ends of the plurality of extrusion plates (30) are fixedly connected to the corresponding side walls of the sliding block (35).

5. A dual-piston viscous damper according to claim 3, characterized in that: The return spring (31) is arranged between the extrusion plate (30) and the second end cover (12), and one end of the return spring (31) away from the extrusion plate (30) is fixedly connected to the side wall of the second end cover (12).

6. A dual-piston viscous damper according to claim 1, characterized in that: The piston rod (14) slides transversely at the center of the first end cover (11) and the second end cover (12).

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