Linear damper

Abstract

The utility model relates to the technical field of dampers, in particular to a linear damper. According to the technical scheme, the linear damper comprises a metal shaft, an end cover, an upper pressure spring, a gasket, a first sealing ring, a shaft seat, a valve seat, a second sealing ring, a base, a lower pressure spring, a shell and a balance sleeve; through the rigid connection arrangement of the shaft seat and the bottom of the metal shaft, the middle can be kept stable, pressure is applied to the end of the metal shaft, the shaft seat is tightly attached to the valve seat, oil can only pass through a hole in the shaft seat and flow into a working area from an oil storage area, and damping force is generated in the period. After pressure applied to the metal shaft is stopped, the lower pressure spring jacks up the base, the base jacks up the shaft base, at the moment, the shaft base is not tightly attached to the valve seat any more, a large amount of oil in a working area flows into an oil storage area through the notch, it is guaranteed that damping force is large, meanwhile, rapid resetting can be achieved, the internal structure is effectively lubricated, and the service life is prolonged. The overall use effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of dampers, and in particular to a linear damper. Background Art

[0002] A damper is a device that provides resistance to motion and dissipates motion energy. A linear damper provides a force opposite to the direction of vibration to consume vibration energy and gradually reduce the vibration amplitude of the object. Dampers mainly include liquid dampers, gas dampers and electromagnetic dampers. According to different working principles, they can also be divided into speed-related and displacement-related types. In aerospace, aviation, military industry, automobile and other industries, dampers are used to reduce vibration and dissipate energy.

[0003] In the field of mechanical engineering, linear dampers are widely used in shock absorption and vibration reduction systems, such as automobile suspension systems, to improve riding comfort and safety. In the field of construction engineering, linear dampers are also used to protect building structures from damage caused by natural disasters such as earthquakes. When an object is vibrated by an external force, the linear damper will apply a force opposite to the vibration direction, namely the damping force. This damping force will consume the energy of the vibration, causing the vibration amplitude of the object to gradually decrease until the vibration stops. As the linear damper reciprocates along the stroke, the impact is too fast, and the oil flow slows down, reducing the response speed of the damper, making it unable to absorb and consume vibration energy in a timely and effective manner, thereby wearing out the internal structure and affecting the shock absorption effect of the damper.

[0004] Therefore, in order to address the situation where the above-mentioned linear damper has a reciprocating stroke and the impact is too fast, the oil flow becomes slow, and the response speed of the damper is reduced, so that it cannot absorb and consume vibration energy in a timely and effective manner, thereby wearing out the internal structure, a linear damper can be designed in which the valve seat and the shaft base cooperate to ensure a large damping force and a quick reset. Utility Model Content

[0005] In order to overcome the problem that the linear damper impacts too quickly as it reciprocates, the oil flow slows down, the response speed of the damper is reduced, and it is unable to absorb and consume vibration energy in a timely and effective manner, thereby wearing out the internal structure and affecting the shock absorption effect of the damper.

[0006] The practical technical solution is: a linear damper, including a metal shaft, an end cover, an upper compression spring, a gasket, a first sealing ring, a shaft seat, a valve seat, a second sealing ring, a base, a lower compression spring, an outer shell and a balancing sleeve; the bottom of the metal shaft is rigidly connected to a shaft seat to maintain the stability of the middle part, the bottom of the shaft seat is correspondingly provided with a valve seat, the outer sleeve of the shaft seat is provided with an outer shell to protect the whole body for oil flow, the top of the shell is buckled with an end cover corresponding to the metal shaft, the bottom of the shell is sleeved with a balancing sleeve to maintain the installation and plug-in operation of the whole body, and the base, valve seat, shaft base, first sealing ring, gasket and end cover are sequentially installed on the metal shaft.

[0007] The cam is located at the bottom of the metal shaft and is connected to the cam by the cam, so that the oil in the cam is kept in the working area and the oil in the cam is kept in the working area. The oil can only flow into the working area through the holes in the shaft seat and the slots on the base. When resetting, the oil flows from the working area to the oil storage area through the slots. The bosses on both sides of the shaft seat and the through holes on the valve seat, the two structures can effectively reduce the idle stroke when pressing. Before the overall installation, the outer shell and the balancing sleeve can be welded together to find the balanced position and place it vertically. Observe the state of the balancing balls and place and install them when the four sets of balancing balls are in a horizontal state. The holes on the card seat can be used to reinforce the connection in sequence, and then the stepped sleeve on the outside of the rib plate can be used to correspond to the snap-fit ​​structure to perform the adaptive snap-fit ​​operation to complete the stable installation of the periphery. As the reciprocating operation is formed, the overall stability is maintained. Multiple groups of isolation blocks on the periphery are distributed on the isolation plate to form a bottom support force support. The rib plates are distributed in four groups on the periphery of the outer sleeve in a circumferential direction to form radial force support on all sides, corresponding to the rib plates to form a fully enclosed protective structure, reducing the impact of external impact on the internal, avoiding shaking of the internal oil, so that the internal oil is evenly lubricated and the overall reciprocating stability is improved.

[0008] Preferably, a first sealing ring is sleeved between the end cover and the shaft seat to prevent oil from overflowing and perform protective operations, and a gasket is fitted on the inner side of the first sealing ring.

[0009] Preferably, a column sleeve is provided on the top of the base, a slot for conducting flow is provided in the center of the column sleeve, and a second sealing ring is provided around the base and the valve seat to prevent oil from overflowing.

[0010] Preferably, bosses corresponding to the valve seat are provided on both sides of the bottom of the shaft seat, and two groups of through holes are opened on the top of the valve seat corresponding to the bosses.

[0011] Preferably, a hole for oil flow is opened at the side end of the shaft seat, and an oil storage area is formed between the lower compression spring and the housing.

[0012] Preferably, the periphery of the shaft seat is provided with a working area formed by guiding the oil in the oil storage area through the hole.

[0013] Preferably, an upper compression spring for press-adjustment operation is provided between the end cover and the metal shaft, and the valve seat, base and lower compression spring are sequentially connected downward into the outer shell.

[0014] Preferably, the peripheral fixing sleeve of the balancing sleeve is provided with an outer sleeve, the bottom of the outer sleeve is provided with a vibration isolation plate, and the bottom of the vibration isolation plate is distributed with multiple groups of vibration isolation blocks.

[0015] Preferably, four groups of ribs for reinforcement are provided in an circumferential direction on the outer periphery of the outer sleeve, stepped sleeves are fixed on the outer ends of the ribs, and balancing balls are provided on the ends of the ribs.

[0016] Preferably, a holder is vertically provided at the center of the rib plate, and holder holes are provided at both ends of the holder.

[0017] Beneficial effects of this utility:

[0018] 1. According to the previous linear damper, as the stroke reciprocates, the impact is too fast, and the oil flow becomes slow, which reduces the response speed of the damper and makes it unable to absorb and consume vibration energy in a timely and effective manner, thereby wearing out the internal structure and affecting the shock absorption effect of the damper. The difference is that the shaft seat, located at the bottom of the metal shaft, is rigidly connected to maintain the stability of the middle part. When pressure is applied to the end of the metal shaft, the shaft seat and the valve seat are tightly attached. The oil can only flow from the oil storage area into the working area through the hole in the shaft base. During this period, a damping force is generated. The outer shell is connected to the outer periphery of the shaft seat to protect the entire structure from oil flow. The end cover is located at the top of the outer shell and is snapped into the corresponding metal shaft. The balance sleeve is located at the bottom of the outer shell to maintain the overall installation and plug-in operation. When the pressure on the metal shaft is stopped, the lower compression spring pushes up the base, and the base pushes up the shaft base. At this time, the shaft base and the valve seat are no longer tightly attached. The oil in the working area flows into the oil storage area through the slot. While ensuring a large damping force, it can also quickly reset, effectively lubricating the internal structure and improving the overall performance.

[0019] 2. Before the overall installation, make a welding connection between the outer shell and the balancing sleeve, find the balanced position and place it vertically, observe the state of the balancing balls, and when the four groups of balancing balls are in a horizontal state, place and install them. The connections can be reinforced in sequence through the holes on the card holder, and then the stepped sleeve on the outside of the rib plate corresponds to the card connection structure to perform the adaptation card connection operation to complete the stable installation of the periphery. As the reciprocating operation is performed, the overall stability is maintained. The rib plates are distributed in four groups on the periphery of the outer shell in a circumferential arrangement to form radial force supports on all sides, corresponding to the rib plates, forming a fully enclosed protective structure to reduce the impact of external impact on the internal and avoid shaking of the internal oil.

[0020] 3. When resetting, the oil flows from the working area into the oil storage area through the groove. The bosses on both sides of the shaft seat and the through holes on the valve seat can effectively reduce the idle stroke when pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of the overall structure of this practical damper;

[0022] Figure 2 Schematic diagram of the metal shaft of this practical damper;

[0023] Figure 3 This is a schematic diagram of the explosion of the metal shaft and shell of this practical damper;

[0024] Figure 4 Schematic diagram of the cross section of the shell of this practical damper;

[0025] Figure 5 Schematic diagram of the base of the practical damper;

[0026] Figure 6 Schematic diagram of the boss of the practical damper;

[0027] Figure 7 This is a schematic diagram of the balancing sleeve of the practical damper;

[0028] Figure 8 Schematic diagram of the rib plate of this practical damper.

[0029] Explanation of the accompanying symbols: 1. Metal shaft; 2. End cover; 3. Upper compression spring; 4. Gasket; 5. First sealing ring; 6. Shaft seat; 7. Valve seat; 8. Second sealing ring; 9. Base; 10. Lower compression spring; 11. Housing; 12. Working area; 13. Oil storage area; 14. Hole; 15. Notch; 16. Through hole; 17. Boss; 18. Balancing sleeve; 1801. Outer sleeve; 1802. Isolation plate; 1803. Isolation block; 1804. Rib plate; 1805. Balancing ball; 1806. Step sleeve; 1807. Clamping seat; 1808. Clamping hole. DETAILED DESCRIPTION

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Example 1: Please refer to Figure 1-2, including a metal shaft 1, an end cover 2, an upper compression spring 3, a gasket 4, a first sealing ring 5, a shaft seat 6, a valve seat 7, a second sealing ring 8, a base 9, a lower compression spring 10, a shell 11 and a balancing sleeve 18; the bottom of the metal shaft 1 is rigidly connected with a shaft seat 6 to maintain the stability of the middle part, and the bottom of the shaft seat 6 is correspondingly provided with a valve seat 7. The outer sleeve of the shaft seat 6 is provided with a shell 11 to protect the whole body for oil flow, and the top of the shell 11 is buckled with an end cover 2 corresponding to the metal shaft 1, and the bottom of the shell 11 is sleeved with a balancing sleeve 18 to maintain the overall installation and plug-in operation. The metal shaft 1 is sequentially equipped with a base 9, a valve seat 7, a shaft base 9, a first sealing ring 5, a gasket 4 and an end cover 2.

[0032] The metal shaft 1 is rigidly connected to the shaft seat 6. When pressure is applied to the end of the metal shaft 1, the shaft seat 6 and the valve seat 7 are in close contact. The oil can only flow into the working area 12 from the oil storage area 13 through the hole 14 on the shaft seat 6. During this period, a damping force will be generated. After the pressure on the metal shaft 1 is stopped, the lower compression spring 10 pushes up the base 9, and the base 9 pushes up the shaft seat 6. At this time, the shaft seat 6 and the valve seat 7 are no longer in close contact. The oil in the working area 12 will flow into the oil storage area 13 through the notch 15 in large quantities. While ensuring a large damping force, it can also be quickly reset. When pressure is applied to the metal shaft 1, the shaft seat 6 will be in close contact with the valve seat 7. The oil can only flow into the working area 12 through the hole 14 of the shaft seat 6. The slot 15 on the base 9 allows the oil to flow from the working area 12 to the oil storage area 13 through the slot 15 when resetting. The bosses 17 on both sides of the shaft seat 6 and the through holes 16 on the valve seat 7 can cooperate to effectively reduce the idle stroke when pressing. The outer shell 11 and the balancing sleeve 18 are welded together to find the balanced position and place it vertically. The state of the balancing balls 1805 is observed. When the four groups of balancing balls 1805 are in a horizontal state, they are placed and installed. The connection can be reinforced in sequence through the card holes 1808 on the card seat 1807, and then the stepped sleeve 1806 on the outside of the rib plate 1804 corresponds to the card connection structure to perform the adaptation card connection operation to complete the stable installation of the periphery.

[0033] See also Figure 2-4 In this embodiment, a first sealing ring 5 is sleeved between the end cover 2 and the shaft seat 6 to prevent oil from overflowing and perform a protective operation. A gasket 4 is fitted on the inner side of the first sealing ring 5. A column sleeve is provided on the top of the base 9. A notch 15 for conducting flow is opened in the center of the column sleeve. A second sealing ring 8 is sleeved around the base 9 and the valve seat 7 to prevent oil from overflowing and perform a protective operation. The gasket 4 and the second sealing ring 8 can form a peripheral superimposed sealing operation as the oil flows inside, thereby increasing the overall anti-overflow protection performance. The oil in the working area 12 flows into the oil storage area 13 in large quantities through the notch 15, ensuring a large damping force while also being able to quickly reset.

[0034] When pressure is applied to the end of the metal shaft 1, the shaft base 9 and the valve seat 7 are in close contact, and the oil can only flow from the oil storage area 13 into the working area 12 through the hole 14 on the shaft base 9, during which a damping force will be generated.

[0035] See also Figure 3-5 In this embodiment, bosses 17 corresponding to the valve seat 7 are provided on both sides of the bottom of the shaft seat 6. Two groups of through holes 16 are opened on the top of the valve seat 7 corresponding to the bosses 17. A hole 14 for oil flow is opened at the side end of the shaft seat 6. An oil storage area 13 is formed between the lower pressure spring 10 and the housing 11. The metal shaft 1 is rigidly connected to the shaft base 9. When pressure is applied to the end of the metal shaft 1, the shaft base 9 and the valve seat 7 are tightly attached. The oil can only pass through the holes 14 on the shaft base 9 and flow from the oil storage area 13 into the working area 12. During this period, a damping force will be generated;

[0036] After the pressure on the metal shaft 1 stops, the lower compression spring 10 pushes up the base 9, and the base 9 pushes up the shaft base 9. At this time, the shaft base 9 and the valve seat 7 are no longer tightly attached, and the oil in the working area 12 flows into the oil storage area 13 through the groove 15 in large quantities, ensuring a large damping force while also allowing for rapid reset.

[0037] See also Figure 4-6 In this embodiment, the periphery of the shaft seat 6 is provided with a working area 12 formed by guiding the oil in the oil storage area 13 through the hole 14. An upper pressure spring 3 for pressing and adjusting operation is provided between the end cover 2 and the metal shaft 1. The valve seat 7, the base 9 and the lower pressure spring 10 are sequentially connected and extend downward into the housing 11.

[0038] The metal shaft 1 is sequentially provided with a base 9, a valve seat 7, a shaft base 9, a first sealing ring 5, a gasket 4 and an end cover 2, which are sequentially assembled and sleeved. When the valve seat 7 and the shaft base 9 are pressed down, the oil in the working area 12 flows into the oil storage area 13 through the groove 15 in large quantities, ensuring a large damping force while also allowing for rapid reset.

[0039] Example 2: Please refer to Figure 1-8 , including a metal shaft 1, an end cover 2, an upper compression spring 3, a gasket 4, a first sealing ring 5, a shaft seat 6, a valve seat 7, a second sealing ring 8, a base 9, a lower compression spring 10, a shell 11 and a balancing sleeve 18; the bottom of the metal shaft 1 is rigidly connected with a shaft seat 6 to maintain the stability of the middle part, and the bottom of the shaft seat 6 is correspondingly provided with a valve seat 7. The outer sleeve of the shaft seat 6 is provided with a shell 11 to protect the whole body for oil flow, and the top of the shell 11 is buckled with an end cover 2 corresponding to the metal shaft 1, and the bottom of the shell 11 is sleeved with a balancing sleeve 18 to maintain the overall installation and plug-in operation. The metal shaft 1 is sequentially equipped with a base 9, a valve seat 7, a shaft base 9, a first sealing ring 5, a gasket 4 and an end cover 2.

[0040] See also Figure 5-7The outer fixed sleeve of the balancing sleeve 18 is provided with an outer sleeve 1801, and the bottom of the outer sleeve 1801 is provided with a shock-isolating plate 1802. The bottom of the shock-isolating plate 1802 is distributed with multiple groups of shock-isolating blocks 1803. The outer periphery of the outer sleeve 1801 is provided with four groups of ribs 1804 for reinforcement in the circumferential direction. Both sides of the bottom of the shaft seat 6 are provided with bosses 17 corresponding to the valve seat 7. The top of the valve seat 7 is provided with two groups of through holes 16 corresponding to the bosses 17. The side end of the shaft seat 6 is provided with a hole 14 for oil flow, and an oil storage area 13 is formed between the lower compression spring 10 and the outer shell 11.

[0041] During the reciprocating shock absorption operation, the oil can only flow from the oil storage area 13 into the working area 12 through the hole 14 on the shaft base 9. During this period, a damping force will be generated. The multiple groups of isolation blocks 1803 on the periphery are synchronously distributed on the isolation plate 1802 to form a bottom support force. The rib plates 1804 are distributed in four groups in a circumferential arrangement on the periphery of the outer sleeve 1801 to form radial force support on all sides, corresponding to the rib plates 1804, to form a fully enclosed protective structure, which reduces the impact of external impact on the internal and avoids shaking of the internal oil, so that the internal oil is evenly lubricated and the overall reciprocating stability performance is improved.

[0042] See also Figure 6-8 The outer periphery of the balancing sleeve 18 is fixed with an outer sleeve 1801, the bottom of the outer sleeve 1801 is provided with a seismic isolation plate 1802, and the bottom of the seismic isolation plate 1802 is distributed with multiple groups of seismic isolation blocks 1803. The outer periphery of the outer sleeve 1801 is circumferentially provided with four groups of ribs 1804 for reinforcement, the outer end of the rib 1804 is fixed with a stepped sleeve 1806, and the end of the rib 1804 is provided with a balancing ball 1805. A clamping seat 1807 is vertically provided at the center of the rib 1804, and clamping holes 1808 are opened at both ends of the clamping seat 1807.

[0043] By welding the outer shell 11 and the balancing sleeve 18, find the balanced position and place it vertically, observe the state of the balancing balls 1805, and when the four groups of balancing balls 1805 are in a horizontal state, place and install them. The connection can be reinforced in sequence through the card holes 1808 on the card holder 1807, and then use the stepped sleeve 1806 on the outside of the rib plate 1804 to adapt to the card structure and complete the stable installation of the periphery.

[0044] It is to be specifically noted that the bosses 17 on both sides of the shaft base 9 and the through holes 16 on the valve seat 7 cooperate to effectively reduce the idle stroke during pressing.

[0045] When working, pressure is applied to the end of the metal shaft 1, and the shaft base 9 is in close contact with the valve seat 7. The oil can only flow from the oil storage area 13 into the working area 12 through the hole 14 on the shaft base 9, during which a damping force will be generated;

[0046] After the pressure on the metal shaft 1 stops, the downward pressure spring 10 pushes up the base 9, and the base 9 pushes up the shaft base 9. At this time, the shaft base 9 and the valve seat 7 are no longer in close contact, and the oil in the working area 12 flows into the oil storage area 13 through the notch 15 in large quantities, ensuring a large damping force while also allowing for rapid reset.

[0047] Before the overall installation, the outer shell 11 and the balancing sleeve 18 can be welded together, and the balanced position can be found and placed vertically. The state of the balancing balls 1805 can be observed. When the four groups of balancing balls 1805 are in a horizontal state, they can be placed and installed. The connection can be reinforced in sequence through the card holes 1808 on the card holder 1807, and then the stepped sleeve 1806 on the outside of the rib plate 1804 can be used to adapt the card structure to perform the card operation to complete the stable installation of the periphery. During the reciprocating operation, the overall stability performance is maintained.

[0048] Through the above steps, pressure is applied to the end of the metal shaft 1 through the shaft seat 6, so that the shaft seat 6 and the valve seat 7 are tightly attached, and the oil can only flow from the oil storage area 13 to the working area 12 through the hole 14 on the shaft base 9. During this period, a damping force will be generated. The outer shell 11 is located on the outer periphery of the shaft seat 6 and is connected to protect the overall oil flow. The end cover 2 is located on the top of the outer shell 11 and is fitted with the corresponding metal shaft 1. The balancing sleeve 18 is located at the bottom of the outer shell 11 and is sleeved to maintain the overall installation and plug-in operation. The oil in the working area 12 flows into the oil storage area 13 in large quantities through the slot 15. While ensuring a large damping force, it can also be quickly reset. The outer shell 11 and the balancing sleeve 18 are welded to find a balanced position and placed vertically. The state of the balancing ball 1805 is observed. When the four groups of balancing balls 1805 are in a horizontal state, they are placed and installed. The connection can be reinforced in sequence through the card holes 1808 on the card seat 1807.

[0049] The above describes the implementation of the present invention in detail with reference to the accompanying drawings, but the present invention is not limited to the above implementation. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the present invention.

Claims

1. A linear damper comprising a metal shaft (1); characterized in that: The invention also includes an end cover (2), an upper compression spring (3), a gasket (4), a first sealing ring (5), a shaft seat (6), a valve seat (7), a second sealing ring (8), a base (9), a lower compression spring (10), a shell (11) and a balancing sleeve (18); the bottom of the metal shaft (1) is rigidly connected to a shaft seat (6) for maintaining the stability of the middle part, the bottom of the shaft seat (6) is correspondingly provided with a valve seat (7), the outer sleeve of the shaft seat (6) is provided with a shell (11) for protecting the whole body from oil flow, the top of the shell (11) is buckled with an end cover (2) corresponding to the metal shaft (1), the bottom of the shell (11) is sleeved with a balancing sleeve (18) for maintaining the whole body for installation and plugging operations, and the base (9), the valve seat (7), the shaft seat (6), the first sealing ring (5), the gasket (4) and the end cover (2) are sequentially installed on the metal shaft (1).

2. A linear damper according to claim 1, characterized in that: A first sealing ring (5) is sleeved between the end cover (2) and the shaft seat (6) for preventing oil from overflowing and performing protective operations, and a gasket (4) is fitted on the inner side of the first sealing ring (5).

3. The linear damper according to claim 1, characterized in that: A column sleeve is provided on the top of the base (9), a notch (15) for conducting flow is provided at the center of the column sleeve, and a second sealing ring (8) is provided around the base (9) and the valve seat (7) to prevent oil from overflowing.

4. The linear damper according to claim 1, characterized in that: Both sides of the bottom of the shaft seat (6) are provided with bosses (17) corresponding to the valve seat (7), and the top of the valve seat (7) is provided with two groups of through holes (16) corresponding to the bosses (17).

5. The linear damper according to claim 1, characterized in that: A hole (14) for oil flow is provided at the side end of the shaft seat (6), and an oil storage area (13) is formed between the lower compression spring (10) and the housing (11).

6. The linear damper according to claim 5, characterized in that: The periphery of the shaft seat (6) is provided with a working area (12) formed by guiding the oil from the oil storage area (13) through the hole (14).

7. The linear damper according to claim 1, characterized in that: An upper compression spring (3) for press-adjusting operation is provided between the end cover (2) and the metal shaft (1), and the valve seat (7), the base (9) and the lower compression spring (10) are sequentially connected and extend downward into the housing (11).

8. The linear damper according to claim 1, characterized in that: The outer fixed sleeve of the balancing sleeve (18) is provided with an outer sleeve (1801), the bottom of the outer sleeve (1801) is provided with a vibration isolation plate (1802), and the bottom of the vibration isolation plate (1802) is distributed with multiple groups of vibration isolation blocks (1803).

9. The linear damper according to claim 8, characterized in that: Four groups of ribs (1804) for reinforcement are provided in an circumferential direction on the outer periphery of the outer sleeve (1801), a stepped sleeve (1806) is fixedly provided on the outer end of the rib (1804), and a balancing ball (1805) is provided at the end of the rib (1804).

10. The linear damper according to claim 8, characterized in that: A clamping seat (1807) is vertically arranged at the center of the rib plate (1804), and clamping holes (1808) are opened at both ends of the clamping seat (1807).

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