Composite buffer type shock absorber

Abstract

The invention is suitable for the technical field of shock insulation equipment, and provides a composite buffer type shock absorber which comprises an upper fixing seat, a lower fixing seat, an elastic shock insulation unit and a plurality of transverse limiting buffers, the elastic shock insulation unit is arranged between the upper fixing seat and the lower fixing seat, the two ends of the elastic shock insulation unit abut against the friction faces of the fixing seats through sliding friction blocks, and the transverse shock absorption function is provided through sliding friction energy consumption. The four transverse limiting buffers which are arranged in an annular array mode are connected with the upper fixing base and the lower fixing base, the transverse reset capacity is enhanced and the displacement amount is limited through the elastic stretching and retracting of buffer springs and the synergistic effect of damping liquid, and the friction blocks are prevented from being disengaged; the multi-directional vibration reduction performance is further optimized, the vertical vibration isolation function and the transverse limiting function are achieved, and the problem that due to too large transverse deviation of a traditional vibration reducer, an elastic unit is torn is effectively solved.

Description

Technical Field

[0001] The invention is applicable to the technical field of seismic isolation equipment and provides a composite buffering vibration absorber. Background Art

[0002] A vibration damper (or vibration-damping bearing) is a passive vibration-absorbing device. One important application is its installation at the foundation or key joints of buildings or bridges. By extending the structure's natural vibration period and increasing damping, it significantly reduces the impact of earthquakes on the superstructure. Its core goal is seismic isolation: through a flexible support system, seismic energy is primarily absorbed by the bearings, rather than being transmitted to the superstructure. A typical vibration damper structure typically consists of an elastomer, with the upper and lower ends connected to the superstructure and the underlying ground or foundation structure via bearings. During an earthquake, the deformation of the elastomer absorbs most of the seismic energy. This structure, with the elastomer as the primary energy absorber, is generally effective in absorbing vertical vibration energy. However, horizontal vibration energy increases the horizontal displacement between the upper and lower bearings, resulting in insufficient horizontal restoring and buffering capabilities. Furthermore, when horizontal displacement exceeds a certain limit, the elastomer is susceptible to horizontal strain and breakage. Currently, no vibration damper (or vibration-damping bearing) can effectively buffer both horizontal and vertical vibrations. Summary of the Invention

[0003] To this end, the present invention provides a composite buffer shock absorber, which provides good vertical vibration isolation performance through an elastic isolation unit, and provides sufficient lateral shock absorption by arranging sliding friction blocks between the elastic isolation unit and the upper and lower fixed seats. At the same time, multiple lateral limit buffers are arranged between the upper and lower fixed seats to increase the lateral vibration isolation capability on the one hand, and provide lateral offset limits for the upper and lower fixed seats on the other hand, to avoid excessive lateral offset between the upper and lower fixed seats, which may cause the sliding friction blocks to fall out.

[0004] In order to achieve the above object, the present invention provides the following technical solution: a composite buffer shock absorber, comprising:

[0005] An upper fixed seat and a lower fixed seat are spaced apart from each other, wherein the upper fixed seat is provided with an upper fixed friction surface on a side facing the lower fixed seat, and the lower fixed seat is provided with a lower fixed friction surface on a side facing the upper fixed seat;

[0006] An elastic seismic isolation unit, wherein the elastic seismic isolation unit is arranged between an upper fixed seat and a lower fixed seat, wherein the upper end of the elastic seismic isolation unit is connected to an upper sliding seat, wherein the upper sliding seat is fixedly connected to an upper sliding friction block on the side facing the upper fixed friction surface, wherein the upper sliding friction block abuts against the upper fixed friction surface, and the lower end of the elastic seismic isolation unit is connected to a lower sliding seat, wherein the lower sliding seat is fixedly connected to a lower sliding friction block on the side facing the lower fixed friction surface, wherein the lower sliding friction block abuts against the lower fixed friction surface;

[0007] Several lateral limit buffers, the two ends of which are respectively connected to the upper fixed seat and the lower fixed seat, the lateral limit buffer includes a buffer fixed cylinder, a buffer telescopic rod and a buffer spring, the two ends of the buffer spring are respectively connected to the buffer fixed cylinder and the buffer telescopic rod, and the buffer telescopic rod can be elastically extended and retracted under the action of the buffer spring.

[0008] Furthermore, the upper fixed friction surface and the lower fixed friction surface are both spherical groove shapes, the shape of the upper sliding friction block facing the upper fixed friction surface is a spherical protrusion shape that matches the upper fixed friction surface, and the shape of the lower sliding friction block facing the lower fixed friction surface is a spherical protrusion shape that matches the lower fixed friction surface.

[0009] Furthermore, a sliding inner cylinder is provided in the buffer fixed cylinder, one end of the buffer telescopic rod extends into the sliding inner cylinder, and the end of the buffer telescopic rod extending into the sliding inner cylinder is fixedly connected to the telescopic rod piston, and a telescopic end connecting ball head is fixedly provided on the side of the buffer telescopic rod away from the buffer fixed cylinder, and a fixed end connecting ball head is fixedly provided on the side of the buffer fixed cylinder away from the buffer telescopic rod, and both ends of the lateral limit buffer are respectively connected to the upper fixed seat and the lower fixed seat through the telescopic end connecting ball head and the fixed end connecting ball head.

[0010] Furthermore, a spring limit sleeve is sleeved on the outer side of the buffer fixed cylinder, and a telescopic end spring limit step is provided at the position of the buffer telescopic rod near the telescopic end connecting ball head, and a fixed end spring limit step is provided on the side of the spring limit sleeve facing the telescopic end spring limit step. The two ends of the buffer spring are respectively abutted against the telescopic end spring limit step and the fixed end spring limit step, and the spring limit sleeve is provided with several spring force adjustment grooves with different height positions, and a spring force adjustment block adapted to the spring force adjustment groove is fixedly provided on the outer side of the buffer fixed cylinder, and the spring force adjustment block can change the distance between the fixed end spring limit step and the telescopic end spring limit step by being stuck into different spring force adjustment grooves.

[0011] Furthermore, the telescopic rod piston is clearance-matched with the inner wall of the sliding inner cylinder, the sliding inner cylinder is filled with damping fluid, and piston limiting sealing blocks are provided at the upper and lower ends of the sliding inner cylinder.

[0012] Furthermore, the number of the lateral limit buffers is four, and the four lateral limit buffers are arranged in a ring array outside the elastic seismic isolation unit.

[0013] In some of the schemes, the elastic seismic isolation unit includes a lead core, an upper connecting plate and a lower connecting plate. The upper connecting plate is fixedly connected to the upper sliding seat, and the lower connecting plate is fixedly connected to the lower sliding seat. An elastic seismic isolation member is arranged between the upper connecting plate and the lower connecting plate. The elastic seismic isolation member includes a plurality of elastic buffer plates and a plurality of hard skeleton plates alternately stacked from top to bottom. The lead core is arranged in sequence from top to bottom through the upper connecting plate, the elastic seismic isolation member and the lower connecting plate.

[0014] In other solutions, the elastic isolation unit includes a plurality of coil spring isolation devices, and the coil spring isolation device includes a longitudinal isolation spring, and two ends of the longitudinal isolation spring are respectively in contact with the upper sliding seat and the lower sliding seat.

[0015] Furthermore, the coil spring seismic isolation device also includes an upper spring limit seat and a lower spring limit seat, the upper spring limit seat is fixedly connected to the upper sliding seat, and the lower spring limit seat is fixedly connected to the lower sliding seat, and the two ends of the coil spring seismic isolation device are respectively sleeved on the outside of the upper spring limit seat and the outside of the lower spring limit seat, and a longitudinal buffer column made of elastic material is arranged between the outside of the upper spring limit seat and the lower spring limit seat.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. In the present invention, various types of elastic isolation units are used to provide vertical vibration isolation. At the same time, sliding friction blocks are respectively provided between the elastic isolation units and the upper and lower fixed seats. The sliding friction between the sliding friction blocks and the fixed friction surfaces is used to provide lateral vibration isolation through friction energy dissipation, thereby avoiding lateral tearing and damage of the elastic isolation units caused by excessive lateral offset between the upper and lower fixed seats.

[0018] 2. By setting multiple lateral limit buffers between the upper and lower fixed seats, the lateral vibration isolation capability and lateral reset capability are further improved. At the same time, the buffer telescopic rod stroke of the lateral limit buffer is used to limit the lateral offset between the upper and lower fixed seats to avoid the sliding friction block from detaching from the fixed friction surface due to excessive lateral offset between the upper and lower fixed seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A top view of a composite buffer shock absorber mentioned in Example 1;

[0020] Figure 2 It is a front view of a composite buffer shock absorber mentioned in Example 1;

[0021] Figure 3 for Figure 2 Structural cross-sectional view in the “AA” direction;

[0022] Figure 4 Schematic diagram of the internal structure of the elastic seismic isolation unit mentioned in Example 1;

[0023] Figure 5 A top view of a composite buffer shock absorber mentioned in Example 2;

[0024] Figure 6 It is a front view of a composite buffer shock absorber mentioned in Example 2;

[0025] Figure 7 for Figure 6 Structural cross-sectional view in the "BB" direction;

[0026] Figure 8 2. It is a cross-sectional view of the internal structure of the coil spring isolation device mentioned in Example 2;

[0027] Figure 9 Schematic diagram of the structure of the lateral limit buffer mentioned in the present invention;

[0028] Figure 10 A cross-sectional view of the internal structure of the transverse limit buffer mentioned in the present invention;

[0029] Figure 11 It is a structural schematic diagram of the spring limiting sleeve mentioned in the present invention.

[0030] In the picture:

[0031] 100, upper fixed seat, 110, upper fixed friction surface;

[0032] 200, lower fixed seat, 210, lower fixed friction surface;

[0033] 300, lateral limit buffer, 310, buffer fixing cylinder, 311, piston limit sealing block, 320, buffer telescopic rod, 321, telescopic rod piston, 330, buffer spring, 340, spring limit sleeve, 341, fixed end spring limit step, 342, spring elasticity adjustment groove, 350, telescopic end spring limit step, 360, spring elasticity adjustment block, 370, damping fluid, 380, telescopic end connecting ball head, 390, fixed end connecting ball head;

[0034] 400, upper sliding seat, 410, upper sliding friction block;

[0035] 500, lower sliding seat, 510, lower sliding friction block;

[0036] 600, elastic seismic isolation unit, 610, upper connecting plate, 620, lower connecting plate, 630, elastic buffer sheet, 640, hard skeleton sheet, 650, lead core;

[0037] 700, coil spring isolation device, 710, upper spring limit seat, 720, lower spring limit seat, 730, longitudinal isolation spring, 740, longitudinal buffer column. DETAILED DESCRIPTION

[0038] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0039] Example 1, refer to the attached Figure 1 ~Attached Figure 3The present invention provides a composite buffer shock absorber, comprising an upper fixed seat 100 and a lower fixed seat 200 spaced apart from each other, an elastic shock isolation unit 600 is provided between the upper fixed seat 100 and the lower fixed seat 200, an upper fixed friction surface 110 is provided on the side of the upper fixed seat 100 facing the lower fixed seat 200, a lower fixed friction surface 210 is provided on the side of the lower fixed seat 200 facing the upper fixed seat 100, an upper sliding seat 400 is connected to the upper end of the elastic shock isolation unit 600, and an upper sliding friction surface 210 is fixedly connected to the side of the upper sliding seat 400 facing the upper fixed friction surface 110. The upper sliding friction block 410 is in contact with the upper fixed friction surface 110, and the lower end of the elastic isolation unit 600 is connected to the lower sliding seat 500. The lower sliding seat 500 is fixedly connected to the lower sliding friction block 510 on the side facing the lower fixed friction surface 210. The lower sliding friction block 510 is in contact with the lower fixed friction surface 210. The upper fixed friction surface 110 and the lower fixed friction surface 210 are both spherical groove shapes. The shape of the side of the upper sliding friction block 410 facing the upper fixed friction surface 110 is a spherical convex block shape that matches the upper fixed friction surface 110. The lower sliding friction block 510 is in contact with the lower fixed friction surface 210. The shape of the side of the downward fixed friction surface 210 of 10 is a spherical convex block shape adapted to the lower fixed friction surface 210. The upper fixed friction surface 110 and the lower fixed friction surface 210 adopt a spherical groove design, which can better match the spherical convex block shape of the upper sliding friction block 410 and the lower sliding friction block 510. This design makes the contact between the friction block and the friction surface closer, increases the friction contact area, and thus improves the stability and shock absorption effect of the shock absorber. Through the above structure, the upper and lower ends of the elastic seismic isolation unit 600 are respectively connected through the upper sliding friction block 41 0. The lower sliding friction block 510 is slidably connected to the upper fixed seat 100 and the lower fixed seat 200. When the shock absorber and its connection structure are subjected to lateral vibration, the upper fixed seat 100 and the lower fixed seat 200 will deviate laterally due to the influence of the lateral vibration energy. During the lateral deviation of the upper fixed seat 100 and the lower fixed seat 200, friction heat and energy will be generated between the upper sliding friction block 410, the lower sliding friction block 510 and the upper fixed friction surface 110 and the lower fixed friction surface 210, thereby buffering the lateral vibration and achieving the effect of absorbing the lateral vibration energy.

[0040] The absorption of vertical vibration energy mainly depends on the elastic isolation unit 600. In the solution of this embodiment, as shown in the attached Figure 4As shown, the elastic seismic isolation unit 600 includes a lead core 650, an upper connecting plate 610 and a lower connecting plate 620. The upper connecting plate 610 is fixedly connected to the upper sliding seat 400, and the lower connecting plate 620 is fixedly connected to the lower sliding seat 500. An elastic seismic isolation member is arranged between the upper connecting plate 610 and the lower connecting plate 620. The elastic seismic isolation member includes a plurality of elastic buffer sheets 630 and a plurality of hard skeleton sheets 640 alternately stacked from top to bottom. The lead core 650 is sequentially arranged from top to bottom through the upper connecting plate 610, the elastic seismic isolation member and the lower connecting plate 620. The elastic buffer sheet 630 can be made of elastic materials such as rubber and polyurethane, and the hard skeleton sheet 640 can be made of metal or composite materials. The alternate stacking can effectively absorb vertical vibration energy. The arrangement of the lead core 650 can increase the overall stiffness of the seismic isolation unit. At the same time, under the action of an earthquake, the plastic deformation of the lead core 650 can further absorb energy and reduce vibration transmission.

[0041] In order to further enhance the lateral vibration isolation capability between the upper fixing base 100 and the lower fixing base 200, a plurality of lateral limit buffers 300 are provided between the upper fixing base 100 and the lower fixing base 200. The two ends of the lateral limit buffers 300 are connected to the upper fixing base 100 and the lower fixing base 200, respectively. Figure 9 , Attachment Figure 10As shown, the lateral limit buffer 300 includes a buffer fixed cylinder 310, a buffer telescopic rod 320 and a buffer spring 330. The two ends of the buffer spring 330 are respectively connected to the buffer fixed cylinder 310 and the buffer telescopic rod 320. The buffer telescopic rod 320 can be elastically extended and retracted under the action of the buffer spring 330, thereby providing effective buffering and reset functions during horizontal vibration. A sliding inner cylinder is provided in the buffer fixed cylinder 310, and one end of the buffer telescopic rod 320 extends into the sliding inner cylinder, and the buffer telescopic rod 320 extends into the sliding inner cylinder. One end is fixedly connected to a telescopic rod piston 321, and the telescopic rod piston 321 is fitted with a gap between the inner wall of the sliding inner cylinder. The sliding inner cylinder is filled with a damping liquid 370. The damping liquid 370 generally adopts a silicone oil-based damping liquid 370, such as dimethyl silicone oil or phenyl silicone oil. The damping liquid 370 filled in the sliding inner cylinder can further enhance the buffering capacity of the buffer telescopic rod 320. When the telescopic rod piston 321 reciprocates in the sliding inner cylinder, the damping liquid 370 is forced to pass through the small gap between the telescopic rod piston 321 and the inner wall of the sliding inner cylinder, generating friction resistance (viscous force), which The energy can be converted into heat energy, thereby improving the buffering capacity of the lateral limit buffer 300. A piston limit sealing block 311 is provided at the upper and lower ends of the sliding inner cylinder. The piston limit sealing block 311 is used to control the stroke of the buffer telescopic rod 320. The limit stroke of the buffer telescopic rod 320 is used to limit the lateral offset between the upper fixed seat 100 and the lower fixed seat 200, thereby avoiding the upper sliding friction block 410 and the lower sliding friction block 510 from falling out due to excessive lateral offset between the upper fixed seat 100 and the lower fixed seat 200, thereby improving safety under extreme working conditions. The telescopic end connecting ball head 380 is fixedly provided on the side of the buffer telescopic rod 320 away from the buffer fixed cylinder 310, and the fixed end connecting ball head 390 is fixedly provided on the side of the buffer fixed cylinder 310 away from the buffer telescopic rod 320. The two ends of the lateral limit buffer 300 are respectively connected to the upper fixed seat 100 and the lower fixed seat 200 through the telescopic end connecting ball head 380 and the fixed end connecting ball head 390. The ball hinge connection can ensure the flexibility of the connection when receiving external forces in different horizontal directions. The outer side of the buffer fixed cylinder 310 is sleeved with a spring limiting sleeve 340, as shown in the attached Figure 10 , Attachment Figure 11As shown, the buffer telescopic rod 320 is provided with a telescopic end spring limiting step 350 near the telescopic end connecting ball head 380, and the spring limiting sleeve 340 is provided with a fixed end spring limiting step 341 on the side facing the telescopic end spring limiting step 350. The two ends of the buffer spring 330 are respectively in contact with the telescopic end spring limiting step 350 and the fixed end spring limiting step 341. The spring limiting sleeve 340 is provided with several spring elastic force adjustment grooves 342 at different heights. The outer side of the buffer fixed cylinder 310 is fixedly provided with a spring elastic force adjustment groove 342 that is adapted to the spring elastic force adjustment groove 342. The spring force adjustment block 360 can be inserted into different spring force adjustment grooves 342 to change the distance between the fixed end spring limit step 341 and the telescopic end spring limit step 350, thereby adjusting the preload force of the buffer spring 330. When the elastic force of the buffer spring 330 gradually decreases due to fatigue damage during use, the preload force can be increased by reducing the distance between the fixed end spring limit step 341 and the telescopic end spring limit step 350 to compensate for it, so that it always maintains qualified buffer reset performance.

[0042] In the most optimized solution, the number of lateral limit buffers 300 is set to four, and the four lateral limit buffers 300 are arranged in a circular array on the outside of the elastic isolation unit 600. This arrangement can better disperse and absorb horizontal vibration energy through the synergistic effect of the four lateral limit buffers 300, thereby avoiding the elastic isolation unit 600 from being pulled and damaged in the horizontal direction. In addition, the circular array arrangement can also enhance the overall stability of the shock absorber, ensuring its reliability and durability in complex vibration environments.

[0043] Example 2, refer to the attached Figure 5 ~Attached Figure 7 In this embodiment, another elastic isolation unit 600 structure different from that of embodiment 1 is proposed. In this embodiment, the elastic isolation unit 600 includes several coil spring isolation devices 700, as shown in the attached figure. Figure 8As shown, the coil spring isolation device 700 includes a longitudinal isolation spring 730, the two ends of which are respectively in contact with the upper sliding seat 400 and the lower sliding seat 500. The coil spring isolation device 700 also includes an upper spring limiting seat 710 and a lower spring limiting seat 720. The upper spring limiting seat 710 is fixedly connected to the upper sliding seat 400, and the lower spring limiting seat 720 is fixedly connected to the lower sliding seat 500. The two ends of the coil spring isolation device 700 are respectively sleeved on the upper spring limiting seat 710. A longitudinal buffer column 740 made of elastic material is arranged on the outside and outside of the lower spring limit seat 720, and between the outside of the upper spring limit seat 710 and the lower spring limit seat 720. The longitudinal seismic isolation spring 730 absorbs and buffers vertical vibration energy through its elastic deformation, thereby reducing the vibration transmission between the upper structure and the lower structure. The setting of the upper spring limit seat 710 and the lower spring limit seat 720 can effectively limit the displacement range of the longitudinal seismic isolation spring 730 and prevent it from excessive deformation or disengagement. The introduction of the longitudinal buffer column 740 further enhances the buffering effect of vertical vibration and can absorb horizontal vibration energy to a certain extent, thereby improving the stability of the overall shock absorber. Unlike the elastic isolation unit 600 in Example 1 which uses a single elastic component, the elastic isolation unit 600 in Example 2 uses multiple coil spring isolation devices 700 to jointly realize the vertical vibration isolation function. The advantage of this design is that it can improve the fault tolerance of the entire shock absorber. In this embodiment, even if one coil spring isolation device 700 fails, the remaining coil spring isolation devices 700 can still provide sufficient vertical vibration isolation and buffering functions, thereby improving the overall reliability.

[0044] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0045] The above are merely preferred embodiments of the present invention. Anyone skilled in the art may utilize the above-described technical solutions to modify the present invention or modify them into equivalent technical solutions. Therefore, any simple modification or equivalent replacement based on the technical solutions of the present invention falls within the scope of protection claimed by the present invention.

Claims

1. A composite buffer shock absorber, characterized in that: include: An upper fixed seat (100) and a lower fixed seat (200) are arranged spaced apart from each other, an upper fixed friction surface (110) is provided on the side of the upper fixed seat (100) facing the lower fixed seat (200), and a lower fixed friction surface (210) is provided on the side of the lower fixed seat (200) facing the upper fixed seat (100); An elastic seismic isolation unit (600), the elastic seismic isolation unit (600) being arranged between an upper fixed seat (100) and a lower fixed seat (200), the upper end of the elastic seismic isolation unit (600) being connected to an upper sliding seat (400), the upper sliding seat (400) being fixedly connected to an upper sliding friction block (410) on a side facing the upper fixed friction surface (110), the upper sliding friction block (410) being in contact with the upper fixed friction surface (110), the lower end of the elastic seismic isolation unit (600) being connected to a lower sliding seat (500), the lower sliding seat (500) being fixedly connected to a lower sliding friction block (510) on a side facing the lower fixed friction surface (210), the lower sliding friction block (510) being in contact with the lower fixed friction surface (210); A plurality of transverse limit buffers (300) are provided, wherein two ends of the transverse limit buffers (300) are respectively connected to an upper fixing seat (100) and a lower fixing seat (200), and the transverse limit buffers (300) comprise a buffer fixing cylinder (310), a buffer telescopic rod (320), and a buffer spring (330), wherein two ends of the buffer spring (330) are respectively connected to the buffer fixing cylinder (310) and the buffer telescopic rod (320), and the buffer telescopic rod (320) can achieve elastic expansion and contraction under the action of the buffer spring (330).

2. The composite buffer shock absorber according to claim 1, characterized in that: The upper fixed friction surface (110) and the lower fixed friction surface (210) are both in the shape of spherical grooves; the shape of the side of the upper sliding friction block (410) facing the upper fixed friction surface (110) is in the shape of a spherical convex block that matches the upper fixed friction surface (110); and the shape of the side of the lower sliding friction block (510) facing the lower fixed friction surface (210) is in the shape of a spherical convex block that matches the lower fixed friction surface (210).

3. The composite buffer shock absorber according to claim 2, characterized in that: A sliding inner cylinder is provided in the buffer fixed cylinder (310), one end of the buffer telescopic rod (320) extends into the sliding inner cylinder, and the end of the buffer telescopic rod (320) extending into the sliding inner cylinder is fixedly connected to a telescopic rod piston (321), a telescopic end connecting ball head (380) is fixedly provided on the side of the buffer telescopic rod (320) away from the buffer fixed cylinder (310), a fixed end connecting ball head (390) is fixedly provided on the side of the buffer fixed cylinder (310) away from the buffer telescopic rod (320), and both ends of the lateral limit buffer (300) are respectively connected to the upper fixed seat (100) and the lower fixed seat (200) through the telescopic end connecting ball head (380) and the fixed end connecting ball head (390).

4. The composite buffer shock absorber according to claim 3, characterized in that: The buffer fixed cylinder (310) is sleeved with a spring limiting sleeve (340) on the outside, the buffer telescopic rod (320) is provided with a telescopic end spring limiting step (350) near the telescopic end connecting ball head (380), the spring limiting sleeve (340) is provided with a fixed end spring limiting step (341) on the side facing the telescopic end spring limiting step (350), and the two ends of the buffer spring (330) are respectively connected to the telescopic end spring limiting step (350) and the fixed end spring limiting step (3 41) abuts, the spring limiting sleeve (340) is provided with a plurality of spring force adjustment grooves (342) at different height positions, and a spring force adjustment block (360) adapted to the spring force adjustment groove (342) is fixedly provided on the outside of the buffer fixed cylinder (310), and the spring force adjustment block (360) can change the distance between the fixed end spring limiting step (341) and the telescopic end spring limiting step (350) by being snapped into different spring force adjustment grooves (342).

5. The composite buffer shock absorber according to claim 4, characterized in that: The telescopic rod piston (321) is clearance-matched with the inner wall of the sliding inner cylinder. The sliding inner cylinder is filled with damping fluid (370). The upper and lower ends of the sliding inner cylinder are both provided with piston limiting sealing blocks (311).

6. The composite buffer shock absorber according to claim 5, characterized in that: The number of the transverse limiting buffers (300) is four, and the four transverse limiting buffers (300) are arranged in a ring array outside the elastic vibration isolation unit (600).

7. A composite buffer shock absorber according to any one of claims 1 to 6, characterized in that: The elastic vibration isolation unit (600) comprises a lead core (650), an upper connecting plate (610) and a lower connecting plate (620), wherein the upper connecting plate (610) is fixedly connected to the upper sliding seat (400), and the lower connecting plate (620) is fixedly connected to the lower sliding seat (500), and an elastic vibration isolation member is provided between the upper connecting plate (610) and the lower connecting plate (620), wherein the elastic vibration isolation member comprises a plurality of elastic buffer sheets (630) and a plurality of hard skeleton sheets (640) alternately stacked from top to bottom, and the lead core (650) is provided through the upper connecting plate (610), the elastic vibration isolation member and the lower connecting plate (620) in sequence from top to bottom.

8. The composite buffer shock absorber according to claims 1 to 6, characterized in that: The elastic vibration isolation unit (600) includes a plurality of coil spring vibration isolation devices (700), and the coil spring vibration isolation device (700) includes a longitudinal vibration isolation spring (730). The two ends of the longitudinal vibration isolation spring (730) are respectively in contact with the upper sliding seat (400) and the lower sliding seat (500).

9. The composite buffer shock absorber according to claim 8, characterized in that: The coil spring vibration isolation device (700) further comprises an upper spring limiting seat (710) and a lower spring limiting seat (720), wherein the upper spring limiting seat (710) is fixedly connected to the upper sliding seat (400), and the lower spring limiting seat (720) is fixedly connected to the lower sliding seat (500), and the two ends of the coil spring vibration isolation device (700) are respectively sleeved on the outer side of the upper spring limiting seat (710) and the outer side of the lower spring limiting seat (720), and a longitudinal buffer column (740) made of elastic material is provided between the outer side of the upper spring limiting seat (710) and the lower spring limiting seat (720).

Images