Damping device

Abstract

A damping device (10), comprising a sleeve (100), a lead block (200), a first mandrel (300), energy consumption assemblies (400), and an elastic member (500). The lead block (200) is fixed to the inner wall of the sleeve (100) close to an end of the sleeve; the first mandrel (300) has one end connected to the lead block (200), and the other end extending out of the sleeve (100) and used for bearing an external load (20); when bearing the external load (20), the first mandrel (300) can move relative to the sleeve (100) in the axis direction of the sleeve (100) to compress the lead block (200); the energy consumption assemblies (400) are connected to the first mandrel (300) and fit with the inner wall of the sleeve (100), so as to generate damping when the first mandrel (300) moves relative to the sleeve (100); and the elastic member (500) is provided in the sleeve (100), can be compressed along with the movement of the first mandrel (300), and is used for damping the first mandrel (300). The elastic member (500) achieves a damping effect on the first mandrel (300), eliminates the impact of long-term micro-vibration of the external load (20) on the lead block (200), and reduces plastic deformation of the lead block (200); and additionally, the energy consumption assemblies (400) can generate damping when moving relative to the inner wall, and convert vibration into heat for dissipation, thereby improving the energy absorption efficiency of the damping device (10).

Description

shock absorber Technical Field

[0001] The present application relates to the technical field of power grid disaster prevention, and in particular to a shock absorbing device. Background Art

[0002] In substations and converter stations, the pillar-type electrical equipment in the station has structural characteristics such as being tall, large, and heavy, and is generally a cantilever structure. Therefore, it is highly vulnerable to earthquakes, and there is an urgent need to improve the seismic performance of the structure.

[0003] In related technologies, shock absorption measures typically involve placing support blocks between the bracket and the equipment to bear the equipment's own weight, with lead blocks placed around the blocks. During an earthquake, the lead blocks create shear deformation, converting the seismic energy into heat and dissipating it, thereby protecting the equipment.

[0004] However, the lead weights in the related art are susceptible to plastic deformation caused by long-term micro-vibration of the equipment and the pressure of its own weight, thereby reducing the energy absorption effect of the lead weights. Therefore, the shock absorption measures in the related art have the problem of poor energy absorption effect.

[0005] Summary of the Invention

[0006] Based on this, it is necessary to provide a shock absorbing device to address the problem that the shock absorbing measures in the related art have poor energy absorption effect.

[0007] A shock absorbing device, comprising:

[0008] sleeve;

[0009] a lead block fixed to the inner wall of the sleeve near the end thereof;

[0010] a first core shaft, one end of which is connected to the lead weight, and the other end of which extends out of the sleeve and is used to bear an external load, and when the first core shaft is subjected to the external load, it can move relative to the sleeve along the axis of the sleeve to compress the lead weight;

[0011] an energy dissipation component connected to the first core shaft and in contact with an inner wall of the sleeve to generate damping when the first core shaft moves relative to the sleeve; and

[0012] An elastic member is provided in the sleeve and can be compressed along with the movement of the first core shaft, and is used for reducing shock on the first core shaft.

[0013] In one embodiment, the energy-consuming components include two groups, which are spaced apart and arranged in the sleeve along the axis of the sleeve.

[0014] In one embodiment, a first limiting portion and a second limiting portion are provided on the inner wall of the sleeve, and both ends of the elastic member are respectively connected to the two groups of energy-consuming components. The two groups of energy-consuming components are both provided between the first limiting portion and the second limiting portion, and the two groups of energy-consuming components are respectively pressed against the first limiting portion and the second limiting portion under the elastic action of the elastic member.

[0015] In one embodiment, the energy-absorbing component includes a fixing part and a follower, the fixing part is fixedly connected to the first core shaft, and the follower is clamped between the fixing part and the inner wall of the sleeve. When the first core shaft moves relative to the sleeve, the fixing part pushes the follower to move relative to the inner wall of the sleeve.

[0016] In one embodiment, the follower is wedge-shaped and has a wedge-shaped surface. When the first core shaft moves relative to the sleeve, the fixing member presses against the wedge-shaped surface.

[0017] In one embodiment, the energy-absorbing component further includes two pushing blocks, the number of the wedge-shaped surfaces is two, the two pushing blocks are respectively used to press against the two wedge-shaped surfaces, and one of the pushing blocks is used to press against the fixing member, and the other pushing block is used to connect to one end of the elastic member.

[0018] In one embodiment, the sleeve includes an outer sleeve, a first blocking sleeve and a second blocking sleeve, the first blocking sleeve and the second blocking sleeve are respectively embedded in two ends of the outer sleeve, and the first blocking sleeve and the second blocking sleeve respectively form the first limiting portion and the second limiting portion.

[0019] In one embodiment, the shock absorbing device further includes a second core shaft, the axis of the second core shaft is connected to the first core shaft, and the second core shaft and the lead block are clamped to each other.

[0020] In one embodiment, a mounting groove is provided on the inner wall of the sleeve, and the lead block is fixed relative to the sleeve by being clamped in the mounting groove.

[0021] In one embodiment, a support member is included, wherein the support member is connected to an end of the first core shaft protruding from the sleeve, and the support member is used to support the external load.

[0022] In one embodiment, a mounting member is included, and the mounting member is provided at an end connected to the sleeve away from the support member.

[0023] In the above-mentioned shock-absorbing device, the elastic member is arranged in the sleeve, and the elastic member can be compressed as the first core shaft moves, so that the shock-absorbing effect on the first core shaft can be achieved, and the influence of the long-term micro-vibration of the external load on the lead block can be eliminated; at the same time, the above-mentioned elastic member can also bear the load of the equipment in daily life, and use its own elastic properties to quickly reset the external load, which is conducive to reducing the plastic deformation of the lead block; in addition, the shock-absorbing device of the present application is also provided with an energy-consuming component, which can generate damping when moving relative to the inner wall and convert the vibration caused by the external load into heat energy consumption, so that the load of the lead block can be further reduced and the working reliability of the lead block can be ensured. Therefore, the setting of the energy-consuming component and the elastic member of the present application is conducive to reducing the plastic deformation of the lead block and improving the energy absorption effect of the shock-absorbing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is a schematic structural diagram of a shock absorbing device for supporting external loads in one embodiment.

[0025] FIG2 is a schematic structural diagram of a shock absorbing device of the present application in one embodiment.

[0026] Explanation of Figure Numbers

[0027] 10. Shock-absorbing device; 20. External load; 30. Bottom plate; 100. Sleeve; 100a. Mounting groove; 110. Outer sleeve; 120. First blocking sleeve; 130. Second blocking sleeve; 200. Lead block; 300. First core shaft; 400. Energy-absorbing component; 410. Fixing member; 420. Follower; 420a. Wedge surface; 430. Pushing block; 500. Elastic member; 600a. First limiting portion; 600b. Second limiting portion; 700. Second core shaft; 700a. Slot; 800. Support member; 900. Mounting member. DETAILED DESCRIPTION

[0028] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0029] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0030] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, if the term "plurality" appears, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0031] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connected," "fixed," etc., should be interpreted broadly. For example, these terms may refer to fixed connections, removable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediary; and internal communication between two components or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0032] In this application, unless otherwise expressly specified or limited, if a first feature is described as being "above" or "below" a second feature, or similar descriptions, this may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is described as being "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is described as being "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0033] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only embodiment.

[0034] Referring to Figures 1 and 2 , Figure 1 is a schematic diagram of a shock absorbing device 10 supporting an external load 20 in one embodiment; Figure 2 is a schematic diagram of a shock absorbing device 10 according to one embodiment of the present application. A shock absorbing device 10 provided in one embodiment of the present application includes a sleeve 100, a lead weight 200, a first mandrel 300, an energy dissipation assembly 400, and an elastic member 500. The lead block 200 is fixed to the inner wall of the sleeve 100 near its end position; one end of the first core shaft 300 is connected to the lead block 200, and the other end extends out of the sleeve 100 and is used to bear the external load 20, and when the first core shaft 300 bears the external load 20, it can move relative to the sleeve 100 along the axial direction of the sleeve 100 to compress the lead block 200; the energy-absorbing component 400 is connected to the first core shaft 300 and fits with the inner wall of the sleeve 100 to generate damping when the first core shaft 300 moves relative to the sleeve 100; the elastic member 500 is arranged in the sleeve 100, and the elastic member 500 can be compressed with the movement of the first core shaft 300, and the elastic member 500 is used to reduce shock to the first core shaft 300.

[0035] Specifically, when the first core shaft 300 moves relative to the sleeve 100, the first core shaft 300 can drive the energy dissipation component 400 to move relative to the inner wall of the sleeve 100 and generate heat energy. The energy dissipation component 400 is used to convert the vibration caused by the external load 20 into heat energy consumption.

[0036] In the shock absorbing device 10, the elastic member 500 is arranged in the sleeve 100, and the elastic member 500 can be compressed as the first core shaft 300 moves, thereby achieving a shock absorbing effect on the first core shaft 300 and eliminating the influence of the long-term micro-vibration of the external load 20 on the lead block 200; at the same time, the elastic member 500 can also bear the load of the equipment in daily life, and use its own elastic properties to quickly reset the external load 20, thereby reducing the plastic deformation of the lead block 200; in addition, the shock absorbing device 10 of the present application is also provided with an energy dissipation component 400, which can generate damping when moving relative to the inner wall and convert the vibration caused by the external load 20 into heat energy consumption, thereby further reducing the load of the lead block 200 and ensuring the working reliability of the lead block 200. Therefore, the setting of the energy dissipation component 400 and the elastic member 500 of the present application is conducive to reducing the plastic deformation of the lead block 200 and improving the energy absorption effect of the shock absorbing device 10.

[0037] It should be noted that this application is primarily applicable to the technical field of power grid disaster prevention. Lead metal energy dissipation damping devices are widely used in power grid substations and converter stations due to their simple structure, low cost, and easy installation and maintenance. Therefore, the external load 20 mentioned above can refer to electrical equipment in the power grid. Of course, this application can also be applied to other fields requiring vibration damping, such as construction and automotive.

[0038] In some embodiments, the energy dissipation assembly 400 includes two groups, which are spaced apart inside the sleeve 100 along the axis of the sleeve 100 . The two groups of energy dissipation assemblies 400 can work simultaneously, thereby improving the energy dissipation effect of the energy dissipation assembly 400 .

[0039] Specifically, for the convenience of description, the two groups of energy-consuming components 400 are respectively defined as a first energy-consuming component and a second energy-consuming component.

[0040] As shown in Figure 2, in some embodiments, a first limiting portion 600a and a second limiting portion 600b are provided on the inner wall of the sleeve 100, and the two ends of the elastic member 500 are respectively connected to the two groups of energy-consuming components 400, and the two groups of energy-consuming components 400 are both provided between the first limiting portion 600a and the second limiting portion 600b, and the two groups of energy-consuming components 400 are respectively abutted against the first limiting portion 600a and the second limiting portion 600b under the elastic action of the elastic member 500.

[0041] Specifically, the working process of the shock absorbing device 10 is described below.

[0042] As shown in Figure 1, the shock absorbing device 10 of the present application can be used for shock absorption of electrical equipment. Take the two symmetrical shock absorbing devices 10 arranged below the electrical equipment in Figure 1 as an example: when the electrical equipment is subjected to horizontal vibration to the right, the shock absorbing device 10 on the right is compressed and the shock absorbing device 10 on the left is pulled.

[0043] Furthermore, the working process of the pressurized shock absorbing device 10 is described as follows:

[0044] When an earthquake occurs, the electrical equipment drives the core shaft downward. Since the energy dissipation assembly 400 is connected to the core shaft, the one closest to the core shaft is the first energy dissipation assembly. The core shaft drives the first energy dissipation assembly downward, away from the first stopper 600a. The first energy dissipation assembly rubs against the inner wall of the sleeve 100, converting the earthquake's energy into heat and dissipating it. Simultaneously, the elastic member 500 is compressed toward the lead block 200, converting some of the earthquake's energy into compression potential energy within the elastic member 500. It should be noted that the second energy dissipation assembly, located near the lead block 200, is restricted in movement by the second stopper 600b and is therefore inoperative.

[0045] At the same time, the working process of the tensioned shock absorbing device 10 on the opposite side is described:

[0046] As the electrical equipment pulls the core shaft upward, and since the energy dissipation assembly 400 is connected to the core shaft, the second energy dissipation assembly 400, located closer to the bottom of the core shaft, is driven upward by the core shaft, away from the second stopper 600b. The second energy dissipation assembly rubs against the inner wall of the sleeve 100, thereby converting the seismic energy into heat and dissipating it. Simultaneously, the elastic member 500 is compressed in a direction away from the lead block 200, converting some of the seismic energy into compression potential energy within the elastic member 500. It should be noted that at this point, the first energy dissipation assembly, which is located away from the lead block 200, is restricted in movement by the first stopper 600a and is therefore inoperative.

[0047] The above symmetrically arranged shock-absorbing device 10 can achieve a shock-absorbing effect under compression and tension, and through two groups of energy-absorbing components 400, it can respectively lean against the first limiting part 600a and the second limiting part 600b, so that the shock-absorbing device 10 can consume the vibration caused by the earthquake regardless of whether it is under compression or tension, thereby improving the energy absorption effect of the shock-absorbing device 10.

[0048] Furthermore, by utilizing the characteristic that the above-mentioned shock-absorbing device 10 can absorb the vibration caused by the earthquake regardless of whether it is under compression or tension, the shock-absorbing device 10 of the present application can also be applied to any shock-absorbing scenario that is simultaneously under compression and tension, such as the shock-absorbing of a sleeve installed through a wall. The shock-absorbing device 10 of the present application can be arranged around the four sides of the sleeve installed through the wall. When there is vibration in all directions of the sleeve, the shock-absorbing device 10 can simultaneously play the role of shock absorption and energy absorption, which is different from the traditional shock-absorbing measures that can only be under compression, or directly use the shear deformation of the lead block 200 to absorb energy and buffer shock.

[0049] In addition, the first limiting portion 600a and the second limiting portion 600b can be structures such as protrusions or baffles on the inner wall of the sleeve 100. Preferably, in some embodiments, the sleeve 100 includes an outer sleeve 110, a first blocking sleeve 120, and a second blocking sleeve 130. The first blocking sleeve 120 and the second blocking sleeve 130 are respectively embedded in the two ends of the outer sleeve 110. The first blocking sleeve 120 and the second blocking sleeve 130 respectively form the first limiting portion 600a and the second limiting portion 600b. In this way, on the basis of realizing the first limiting portion 600a and the second limiting portion 600b, the assembly convenience of the shock absorbing device 10 can also be improved.

[0050] Specifically, the two energy dissipation assemblies 400 can respectively abut against the opposing end surfaces of the first and second blocking sleeves 120, 130. The first and second blocking sleeves 120, 130 can be screwed into the outer sleeve 110 via threaded connections, or snapped into the outer sleeve 110. The wall thickness of the first and second blocking sleeves 120, 130 is adapted to the size of the energy dissipation assemblies 400, ensuring a blocking effect on the energy dissipation assemblies 400.

[0051] In some embodiments, the inner wall of the sleeve 100 is provided with a mounting groove 100a, and the lead weight 200 is fixed relative to the sleeve 100 by being clamped in the mounting groove 100a, which facilitates the installation of the lead weight 200. Specifically, in an embodiment in which the sleeve 100 includes an outer sleeve 110, a first blocking sleeve 120, and a second blocking sleeve 130, the mounting groove 100a can be provided on the inner wall of the second sleeve 100.

[0052] In some embodiments, the energy-absorbing component 400 includes a fixing member 410 and a follower 420. The fixing member 410 is fixedly connected to the first core shaft 300. The follower 420 is clamped between the fixing member 410 and the inner wall of the sleeve 100. When the first core shaft 300 moves relative to the sleeve 100, the fixing member 410 pushes the follower 420 to move relative to the inner wall of the sleeve 100, thereby realizing friction energy consumption between the follower 420 and the inner wall.

[0053] Specifically, the connection between the fixing member 410 and the first core shaft 300 can be a threaded connection or a clamping connection, which is conducive to improving the ease of assembly.

[0054] In some embodiments, the follower 420 is wedge-shaped and has a wedge surface 420 a. When the first core shaft 300 moves relative to the sleeve 100, the fixing member 410 presses against the wedge surface 420 a to push the follower 420 to dissipate friction energy on the inner wall of the sleeve 100.

[0055] Specifically, the follower 420 can be a movable block. The follower 420 includes a friction surface and the aforementioned wedge surface 420a disposed opposite the friction surface. The friction surface is in contact with the inner wall of the sleeve 100, and the wedge surface 420a is configured to press against the fixing member 410. Because the wedge surface 420a is disposed at a certain angle, when the follower 420 and the fixing member 410 press against each other, the follower 420 is subjected to a driving force perpendicular to the wedge surface 420a. This driving force can be decomposed into two parts: one part drives the follower 420 to move along the axis of the sleeve 100, and the other part acts on the inner wall of the sleeve 100 to increase the friction between the follower 420 and the inner wall of the sleeve 100, thereby improving the energy dissipation effect of the energy dissipation component 400 on the energy of the earthquake, and further improving the shock absorption effect of the shock absorption device 10.

[0056] Furthermore, in some embodiments, the energy dissipation component 400 further includes a pushing block 430 adapted to the wedge-shaped surface 420 a , and the pushing block 430 is sandwiched between the follower 420 and the core shaft.

[0057] Furthermore, in combination with what is shown in FIG2 , in some embodiments, the energy-absorbing component 400 includes two pushing blocks 430 , and the number of the wedge-shaped surfaces 420 a is two. The two pushing blocks 430 are respectively used to press against the two wedge-shaped surfaces 420 a , and one of the pushing blocks 430 is used to press against the fixing member, and the other pushing block 430 is used to connect with one end of the elastic member 500 . In this arrangement, one of the pushing blocks 430 serves as a pushing receptor of the fixing member 410 , and the other pushing block 430 serves as a compression receptor of the spring, thereby improving the rationality of the structural arrangement.

[0058] It should be noted that the provision of the push block 430 in this application improves the structural rationality and device simplicity of the shock absorber 10, and further facilitates the maintenance and replacement of components of the device. It is understood that some embodiments in which the push is achieved directly by the fixing member 410 against the follower 420 should also fall within the scope of protection of this application.

[0059] In some embodiments, the shock absorbing device 10 further includes a second mandrel 700, the axis of which is connected to the first mandrel 300, and the second mandrel 700 is clamped to the lead weight 200. Specifically, the connection between the second mandrel 700 and the first mandrel 300 can be a threaded connection or a clamping connection, etc.; the connection between the second mandrel 700 and the lead weight 200 can be a clamping connection or a pin connection, etc., which can improve the assembly convenience of the device.

[0060] Preferably, in some embodiments, the second core shaft 700 has a slot 700a, and the lead block 200 is simultaneously embedded in the slot 700a of the second core shaft 700 and the mounting groove 100a on the inner wall of the sleeve 100 to achieve position fixation of the lead block 200, and the structure is simple and reliable.

[0061] In some embodiments, the shock absorbing device 10 includes a support member 800 connected to the end of the first mandrel 300 protruding from the sleeve 100. The support member 800 is used to support the external load 20. Specifically, the support member 800 may be a support plate or a support block. Preferably, the support member 800 is a plate, which increases the contact area between the shock absorbing device 10 and the external load 20, thereby ensuring effective support.

[0062] In some embodiments, the shock absorbing device 10 includes a mounting member 900, which is provided at an end of the sleeve 100 away from the support member 800, and is used to achieve installation and fixation of the shock absorbing device 10. Specifically, the mounting member 900 can be a screw, which is fixed by a threaded connection.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A shock absorbing device, characterized in that: The shock absorbing device comprises: Sleeve; A lead block fixed to the inner wall of the sleeve near the end thereof; A first mandrel, one end of which is connected to the lead block, and the other end of which extends out of the sleeve and is used to bear an external load, and when the first mandrel is subjected to the external load, it can move relative to the sleeve along the axial direction of the sleeve to compress the lead block; an energy dissipation component, the energy dissipation component being connected to the first core shaft and being in contact with the inner wall of the sleeve so as to generate damping when the first core shaft moves relative to the sleeve; and An elastic member is disposed in the sleeve and can be compressed along with the movement of the first mandrel, and is used for damping the first mandrel.

2. The shock absorbing device according to claim 1, characterized in that: The energy dissipation components include two groups, which are respectively arranged in the sleeve at intervals along the axis of the sleeve.

3. The shock absorbing device according to claim 2, characterized in that: A first limiting portion and a second limiting portion are provided on the inner wall of the sleeve, and both ends of the elastic member are respectively connected to the two groups of energy-absorbing components. The two groups of energy-absorbing components are both provided between the first limiting portion and the second limiting portion, and the two groups of energy-absorbing components are respectively pressed against the first limiting portion and the second limiting portion under the elastic action of the elastic member.

4. The shock absorbing device according to claim 3, characterized in that: The energy-absorbing component includes a fixing part and a follower, wherein the fixing part is fixedly connected to the first core shaft, and the follower is clamped between the fixing part and the inner wall of the sleeve. When the first core shaft moves relative to the sleeve, the fixing part pushes the follower to move relative to the inner wall of the sleeve.

5. The shock absorbing device according to claim 4, characterized in that: The follower is wedge-shaped and has a wedge-shaped surface. When the first core shaft moves relative to the sleeve, the fixing member presses against the wedge-shaped surface.

6. The shock absorbing device according to claim 5, characterized in that: The energy dissipation component also includes two pushing blocks, the number of the wedge-shaped surfaces is two, the two pushing blocks are respectively used to press against the two wedge-shaped surfaces, and one of the pushing blocks is used to resist against the fixing member, and the other pushing block is used to connect with one end of the elastic member.

7. The shock absorbing device according to claim 4, characterized in that: The sleeve includes an outer sleeve, a first blocking sleeve and a second blocking sleeve. The first blocking sleeve and the second blocking sleeve are respectively embedded in two ends of the outer sleeve. The first blocking sleeve and the second blocking sleeve respectively form the first limiting portion and the second limiting portion.

8. The shock absorbing device according to claim 1, characterized in that: The shock absorbing device also includes a second core shaft, the axis of the second core shaft is connected to the first core shaft, and the second core shaft and the lead block are mutually clamped.

9. The shock absorbing device according to claim 1, characterized in that: The inner wall of the sleeve is provided with a mounting groove, and the lead block is fixed relative to the sleeve by being clamped in the mounting groove.

10. The shock absorbing device according to claim 1, characterized in that: It comprises a support member, the support member is connected to one end of the first core shaft protruding from the sleeve, and the support member is used to support the external load.

11. The shock absorbing device according to claim 10, characterized in that: It comprises a mounting piece, and the mounting piece is arranged at one end of the sleeve away from the supporting piece.

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