Linear damper

Abstract

The invention 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 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 in the opposite 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, automotive 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 exert a force opposite to the direction of vibration, 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 with 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 view of the fact that the above-mentioned linear damper has a reciprocating stroke and the impact is too fast, the oil flow becomes slow, the response speed of the damper is reduced, and it is unable to absorb and consume the vibration energy in time and effectively, 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. Summary of the invention

[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 absorbing effect of the damper.

[0006] The technical solution of the present invention 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 with a shaft seat for maintaining 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 for protecting the whole body for oil flow, the top of the outer shell is buckled with an end cover corresponding to the metal shaft, the bottom of the outer shell is sleeved with a balancing sleeve for maintaining the whole body for installation and plug-in operations, and the base, valve seat, shaft base, first sealing ring, gasket and end cover are sequentially installed on the metal shaft.

[0007] Preferably, the shaft seat is rigidly connected to the bottom of the metal shaft to keep the middle part stable. When pressure is applied to the end of the metal shaft, the shaft seat and the valve seat are in close contact. The oil can only flow from the oil storage area to the working area through the holes in the shaft seat. During this period, a damping force will be generated. The outer shell is connected to the outer sleeve of the shaft seat to protect the overall oil flow. The end cover is snap-fitted to the top of the outer shell to connect with the corresponding metal shaft. The balancing sleeve is sleeved at the bottom of the outer shell to keep the overall installation and plug-in operation. The metal shaft is rigidly connected to the shaft seat. When pressure is applied to the end of the metal shaft, the shaft seat and the valve seat are in close contact. The oil can only flow from the oil storage area to the working area through the holes in the shaft seat. During this period, a damping force will be generated. After stopping applying pressure to the metal shaft, the lower compression spring lifts the base, and the base lifts the shaft seat. At this time, the shaft seat and the valve seat are no longer in close contact. The oil in the working area will flow into the oil storage area in large quantities through the slot. While ensuring a large damping force, it can also be quickly reset. When pressure is applied to the metal shaft, the shaft seat will be in close contact with the valve seat, and the oil 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 empty stroke when pressing. Before the overall installation, the outer shell and the balancing sleeve can be welded and connected, and the balanced position can be found and placed vertically. The state of the balancing balls can be observed, and when the four groups of balancing balls are in a horizontal state, they can be placed and installed. The connections can be reinforced in sequence through the holes on the card seat, and then the stepped sleeve on the outside of the rib plate can be used to correspond to the card structure to perform the adapter card 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 an annular arrangement to form radial force support all around, corresponding to the rib plates to form a fully enclosed protection structure, which reduces the impact of the outside on the inside and avoids 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 for protection against oil spillage, 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 at the center of the column sleeve, and a second sealing ring is provided on the outer periphery of the base and the valve seat to prevent oil from overflowing for protection.

[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 holes.

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

[0014] Preferably, the outer fixed sleeve of the balancing sleeve is provided with an outer sleeve, the bottom of the outer sleeve is provided with a seismic isolation plate, and the bottom of the seismic isolation plate is distributed with a plurality of groups of seismic 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 fixedly provided on the outer ends of the ribs, and balancing balls are provided on the ends of the ribs.

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

[0017] Beneficial effects of the present invention:

[0018] 1. According to the previous situation that the linear damper reciprocates with the stroke, the impact is too fast, the oil flow is slow, the response speed of the damper is reduced, and it cannot absorb and consume the vibration energy in time and effectively, and then the internal structure is worn, affecting the shock absorption effect of the damper. The difference is that the shaft seat is located at the bottom of the metal shaft and the rigid connection is set to keep the middle stable. When pressure is applied to the end of the metal shaft, the shaft seat and the valve seat are in close contact, and the oil can only flow from the oil storage area to the working area through the hole on the shaft base. During this period, a damping force will be generated. Through the outer shell, the outer sleeve connection located at the outer periphery of the shaft seat can protect the overall oil flow. Through the end cover, the corresponding metal shaft is connected at the top of the shell. The balance sleeve is used at the bottom of the shell. The sleeve setting can keep the overall installation and plug-in operation. After stopping applying pressure to the metal shaft, the lower compression spring lifts the base, and the base lifts the shaft base. At this time, the shaft base and the valve seat are no longer in close contact, and the oil in the working area flows into the oil storage area through the notch. While ensuring a large damping force, it can also be quickly reset, effectively lubricating its internal structure and increasing the overall use effect.

[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 socket, and then the stepped sleeve on the outside of the rib plate corresponds to the card connection structure to perform the adapter card connection operation to complete the stable installation of the periphery. During the reciprocating operation, 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 to form a fully enclosed protective structure to reduce the impact of the outside on the inside 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 is a schematic diagram of the overall structure of the damper of the present invention;

[0022] Figure 2 It is a schematic diagram of the metal shaft of the damper of the present invention;

[0023] Figure 3 It is a schematic diagram of the explosion of the metal shaft and the housing of the damper of the present invention;

[0024] Figure 4 is a schematic cross-sectional view of a housing of the damper of the present invention;

[0025] Figure 5 is a schematic diagram of a base of the damper of the present invention;

[0026] Figure 6 It is a schematic diagram of the boss of the damper of the present invention;

[0027] Figure 7 It is a schematic diagram of a balancing sleeve of a damper of the present invention;

[0028] Figure 8 It is a schematic diagram of the rib plate of the damper of the present invention.

[0029] Explanation of the reference numerals in the accompanying drawings: 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 in conjunction with 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 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 for oil flow, 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 for maintaining the whole body for installation and plug-in operations, and the base 9, the valve seat 7, the shaft base 9, the first sealing ring 5, the gasket 4 and the end cover 2 are sequentially installed on the metal shaft 1.

[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 stops, the lower compression spring 10 lifts the base 9, and the base 9 lifts 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 flows 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 into 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 and connected. The balanced position is found and placed 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. They can be reinforced and connected in turn through the clamping holes 1808 on the clamping seat 1807, and then the stepped sleeve 1806 on the outside of the rib plate 1804 corresponds to the clamping structure to perform the adaptation clamping operation to complete the stable installation of the periphery.

[0033] See also Figure 2-4 In this embodiment, a first sealing ring 5 for preventing oil from overflowing and performing protective operation is sleeved between the end cover 2 and the shaft seat 6, 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, and a second sealing ring 8 for preventing oil from overflowing and performing protective operation is sleeved on the periphery of the base 9 and the valve seat 7. By using the gasket 4 and the second sealing ring 8, as the oil flows inside, a peripheral superimposed sealing operation can be formed, thereby increasing the overall anti-overflow protection performance, and the oil in the working area 12 flows 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;

[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, and two groups of through holes 16 are provided on the top of the valve seat 7 corresponding to the bosses 17. 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. 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 is tightly attached to the valve seat 7, and the oil can only pass through the hole 14 on the shaft base 9 and flow from the oil storage area 13 into the working area 12, during which 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, while ensuring a large damping force and quickly resetting.

[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 compression spring 3 for pressing and 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;

[0038] The metal shaft 1 is 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 in sequence, which are arranged in a sequentially assembled sleeve arrangement. 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 that the damping force is large while also being able to quickly 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 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 for oil flow, 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 for maintaining the whole body for installation and plug-in operations, and the base 9, the valve seat 7, the shaft base 9, the first sealing ring 5, the gasket 4 and the end cover 2 are sequentially installed on the metal shaft 1.

[0040] See also Figure 5-7The outer fixed sleeve of the balance sleeve 18 is provided 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 provided with a plurality of seismic isolation blocks 1803. The outer sleeve 1801 is provided with four groups of reinforcing ribs 1804 in an annular 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 on the periphery of the outer sleeve 1801 in an annular arrangement to form radial force supports all around, 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, thereby making the internal oil evenly lubricated and improving the overall reciprocating stability performance.

[0042] See also Figure 6-8 The outer periphery of the balancing sleeve 18 is fixedly provided 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 provided with a plurality of seismic isolation blocks 1803. The outer periphery of the outer sleeve 1801 is circumferentially provided with four groups of reinforcing ribs 1804, the outer end of the rib 1804 is fixedly provided 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 provided 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 connections can be reinforced one by one through the clamping holes 1808 on the clamping seat 1807, and then the stepped sleeve 1806 on the outside of the rib plate 1804 corresponds to the clamping structure to perform the adapter clamping operation to 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 with each other 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 tightly attached to the valve seat 7. 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, and a damping force will be generated during this period.

[0046] 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 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, while ensuring a large damping force and quickly resetting;

[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 clamping holes 1808 on the clamping seat 1807, and then the stepped sleeve 1806 on the outside of the rib plate 1804 can be used to adapt the clamping structure to complete the stable installation of the periphery. During the reciprocating operation, the overall stable performance can be 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 into the working area 12 from the oil storage area 13 through the hole 14 on the shaft base 9. During this period, a damping force will be generated. The outer shell 11 is connected to the outer sleeve of the shaft seat 6 to protect the overall oil flow. The end cover 2 is located at 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 groove 15. While ensuring a large damping force, it can also be quickly reset. The outer shell 11 and the balancing sleeve 18 are welded and connected to find the 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, and can be reinforced and connected in sequence through the clamping holes 1808 on the clamping seat 1807.

[0049] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the spirit of the present invention.

Claims

1. A linear damper, comprising a metal shaft (1); characterized in that: The invention also comprises 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) 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 periphery 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) passing through, 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 base (6), the first sealing ring (5), the gasket (4) and the end cover (2) are sequentially arranged 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) to prevent oil from overflowing and to perform protective operations, and a gasket (4) is fitted on the inner side of the first sealing ring (5).

3. A 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 on the periphery of the base (9) and the valve seat (7) to prevent oil from overflowing and provide protection.

4. A 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. A 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. A 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. A linear damper according to claim 1, characterized in that: An upper compression spring (3) for pressing and adjusting operation is arranged 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. A 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 seismic isolation plate (1802), and the bottom of the seismic isolation plate (1802) is provided with a plurality of groups of seismic isolation blocks (1803).

9. A linear damper according to claim 8, characterized in that: Four groups of reinforcing ribs (1804) 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 plate (1804), and a balancing ball (1805) is provided at the end of the rib plate (1804).

10. A 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 provided at both ends of the clamping seat (1807).

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