A vibration damping structure for a bottom-discharge vibratory crusher

Abstract

This utility model discloses a vibration damping structure for a bottom-discharge vibratory compactor for crushed stone, including a vibratory head and a guide rod connected to the vibratory head. An outer cylinder for injecting an elastomer is connected to the top surface of the vibratory head. An inner cylinder connected to the outer wall of the guide rod is located inside the outer cylinder. The space between the outer and inner cylinders is filled with an elastomer. At least three energy-absorbing springs are evenly distributed in a ring around the guide rod on the bottom surface of the inner cylinder. A lower support plate is provided on the top surface of the energy-absorbing springs. This utility model can convert the vibrations in various directions generated by the eccentric rotation of the vibratory head into axial vibrations of the guide rod, and then into circumferential rotation of the guide rod, effectively achieving a vibration damping effect.

Description

Technical Field

[0001] This utility model relates to the field of vibratory compaction equipment technology, specifically to a shock-absorbing structure for a bottom-discharge vibratory compactor for crushed stone. Background Technology

[0002] Since its introduction to China in the 1970s, vibro-compaction technology has been widely used in water conservancy and hydropower, thermal power generation, ports and wharves, oil refining, highways, railways, metallurgy, industrial and civil buildings, and land reclamation projects after nearly 50 years of application and development. Vibro-compaction stone pile composite foundations generally have good treatment effects on loose sand, silt, and cohesive soils. However, for soft soil foundations with undrained strength <20kPa, the lateral constraint is usually small. During the insertion process, the vibro-compactor and guide rod are tightly wrapped by the soft soil, making it difficult to form a hole. This results in the crushed stone material at the top not being able to reach deeper soil layers with the guide rod, leaving sufficient crushed stone material only in a certain area at the top of the soft soil layer, seriously affecting the pile quality of vibro-compaction stone piles. Therefore, the key technology of bottom discharge vibratory crushed stone pile composite foundation has successfully solved the critical feeding problem that affects the quality of vibratory crushed stone piles, thus opening up the application field of vibratory crushed stone piles in forming composite foundations under deep soft plastic silt strata.

[0003] In traditional designs, vibratory compactors rely solely on rubber damping pads or spring buffers to isolate vibrations. However, in bottom discharge mode, the equipment needs to be rigidly connected to the foundation to achieve precise discharge control, which causes vibration energy to be directly transmitted to the main body of the equipment and surrounding structures, exacerbating component wear (such as shortening bearing life by 30%-50%) and triggering the risk of ground resonance. Utility Model Content

[0004] The purpose of this utility model is to provide a shock-absorbing structure for a bottom-discharge crusher vibratory impactor, which can convert the vibrations in various directions generated by the eccentric rotation of the impact head into axial vibrations of the guide rod and then into circumferential rotations of the guide rod, thus effectively reducing vibrations.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0006] A vibration damping structure for a bottom-discharge vibratory crusher includes a vibratory head and a guide rod connected to the vibratory head. An outer cylinder for injecting an elastomer is connected to the top surface of the vibratory head. An inner cylinder connected to the outer wall of the guide rod is located inside the outer cylinder. The space between the outer and inner cylinders is filled with the elastomer. At least three energy-absorbing springs are evenly distributed in a ring around the guide rod on the bottom surface of the inner cylinder. A lower support plate is provided on the top surface of each energy-absorbing spring. Its function is to initially dampen the vibration transmitted from the outer cylinder to the elastomer through the outer cylinder, the inner cylinder, and the elastomer located between them. Through the energy-absorbing springs and the lower support plate, vibrations in all directions received by the bottom of the inner cylinder are converted into elastic potential energy by the energy-absorbing springs. When the energy-absorbing springs convert the elastic potential energy into kinetic energy, the lower support plate moves axially along the guide rod, thereby achieving the effect of converting vibrations in all directions received by the bottom of the inner cylinder into vibrations along the axial direction of the guide rod.

[0007] Furthermore, the inner cylinder is equipped with an energy-consuming bearing coaxially sleeved outside the guide rod. A support rod is provided on the top surface of the lower support plate, and an upper support plate is provided on the top surface of the support rod, perpendicular to the axial direction of the guide rod. At least three drive rollers are evenly distributed in a ring around the axis of the guide rod on the top surface of the upper support plate. The axial direction of the drive rollers is inclined to the axial direction of the energy-consuming bearing, and the outer wall of the drive rollers is in contact with the outer wall of the energy-consuming bearing. The plane containing the axis of the drive rollers is perpendicular to the upper support plate and perpendicular to the radial direction of the energy-consuming bearing. The energy-consuming bearing can be any bearing found in existing technology and will not be described in detail. Its function is as follows: by setting up the support rod and the upper support plate, the vibrations in all directions received by the inner cylinder can be converted into vibrations along the axial direction of the guide rod. At the same time, by setting up the support rod, the lower support plate and the upper support plate can have a relatively thin thickness, so as to avoid the overall weight of the lower support plate, support rod and upper support plate being too large and causing the energy-absorbing spring to fail. By setting up the energy-dissipating bearing, the vibration transmitted to the energy-dissipating bearing by the lower support plate can be converted into the rotation of the energy-dissipating bearing to consume the vibration generated by the vibratory punch. By designing the active roller and the spatial relationship between the active roller and the energy-dissipating bearing, the axial vibration of the guide rod transmitted by the upper support plate to the active roller can be converted into rotation around the axis of the active roller, while the energy-dissipating bearing rotates around its own axis.

[0008] Furthermore, the lower support plate is annularly arranged coaxially with the axis of the guide rod. The inner diameter of the lower support plate is the same as the outer diameter of the elastic wall, and the outer diameter of the lower support plate is the same as the inner diameter of the rigid wall. Spring grooves for embedding local energy-absorbing springs are provided on the top surface of the bottom end of the inner cylinder and the bottom surface of the lower support plate. Its function is to prevent the lower support plate from shifting in a plane perpendicular to the axis of the guide rod through the design of the spring grooves and the dimensional relationship between the lower support plate and the inner cylinder, thereby ensuring that the reset and tension direction of the energy-absorbing spring is parallel to the axis of the guide rod.

[0009] Furthermore, the inner wall of the inner cylinder is provided with a guide rod arranged parallel to the axial direction of the guide rod, and the lower support plate is provided with a guide groove with the same cross-section as the guide rod. The function of the guide rod and guide groove is to prevent the lower support from rotating around the guide rod, thereby ensuring that the return stretching direction of the energy-absorbing spring is parallel to the axial direction of the guide rod.

[0010] Furthermore, the inner cylinder includes an elastic wall for direct contact with the outer wall of the guide rod and a rigid wall for direct contact with the elastic body inside the outer cylinder. The upper support plate is annularly arranged coaxially with the axis of the guide rod, and is located between the elastic wall and the rigid wall. The inner diameter of the upper support plate is the same as the outer diameter of the elastic wall, and the outer diameter of the upper support plate is the same as the inner diameter of the rigid wall. Its function is to ensure that, through the design of the dimensional relationship between the upper support plate and the elastic wall, and between the upper support plate and the rigid wall, the upper support plate can only move along the axial direction of the guide rod.

[0011] Furthermore, the elastic wall includes a rigid section and a plastic section, with a plastic section at each of the upper and lower ends of the rigid section. The function of the plastic sections is to mitigate some of the vibration of the elastic wall along the axial direction of the guide rod caused by the energy-consuming bearings.

[0012] Furthermore, the outer wall of the rigid section is provided with an embedding groove for embedding an energy-consuming bearing.

[0013] Furthermore, the bottom surface of the support rod is provided with a lower support plate, and an energy-absorbing spring arranged parallel to the axis of the guide rod is connected between the lower support plate and the bottom surface of the inner cylinder. Its function is to provide support for the bottom end of the support rod through the lower support plate.

[0014] Furthermore, the bottom end of the outer cylinder is connected to the top end of the vibratory punch, and a filling gap for filling the elastomer is provided between the outer cylinder and the inner cylinder. A feed port for communicating with the filling gap is provided between the top end of the outer cylinder and the guide rod, and a conduction gap is provided between the bottom end of the outer cylinder and the guide rod. The function of this conduction gap is to allow the elastomer to directly contact the vibratory punch, thereby facilitating the transmission of the vibration generated by the vibratory punch to the elastomer.

[0015] Furthermore, the inner cylinder is provided with a top cover, and the top cover has a heat-conducting part extending outside the feed inlet. Its function is to transfer the heat generated when the energy-consuming bearing rotates to the outside of the inner cylinder through the heat-conducting part, so as to avoid the temperature inside the inner cylinder from becoming too high.

[0016] Furthermore, the inner cylinder is provided with a top cover, and the outer cylinder is provided with a venting channel that passes through the feed inlet and extends through the elastomer and the top cover. The function of this venting channel is to balance the atmospheric pressure and temperature inside and outside the inner cylinder.

[0017] The beneficial effects of this utility model are:

[0018] 1. By setting up an outer cylinder, an inner cylinder, and an elastic body between the outer cylinder and the inner cylinder, the vibration transmitted from the outer cylinder to the elastic body can be initially damped; by setting up an energy-consuming bearing and a transmission component, the vibration transmitted from the elastic body to the energy-consuming bearing can be converted into the rotation of the energy-consuming bearing to consume the vibration generated by the vibratory punch.

[0019] 2. By setting up the support rod and the upper support plate, the vibrations in all directions received by the inner cylinder can be converted into vibrations along the axial direction of the guide rod; by designing the active roller and the spatial relationship between the active roller and the energy-consuming bearing, the axial vibration of the guide rod transmitted by the upper support plate to the active roller can be converted into rotation around the axis of the active roller itself, while the energy-consuming bearing rotates around its own axis. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Example 1;

[0021] Figure 2 This is a three-dimensional cross-sectional structural schematic diagram of Example 1 (excluding the guide rod, vibratory punch, and elastic body);

[0022] Figure 3 This is a three-dimensional structural diagram of the transmission assembly consisting of the upper support plate, support rod, lower support plate, and drive roller in Example 1.

[0023] Figure 4 This is a schematic diagram of the structure of Example 2.

[0024] Reference numerals: 1. Guide rod; 2. Outer cylinder; 3. Inner cylinder; 301. Elastic wall; 302. Rigid wall; 4. Elastomer; 5. Energy-dissipating bearing; 6. Support rod; 7. Upper support plate; 8. Drive roller; 9. Rigid section; 10. Plastic section; 11. Embedded groove; 12. Lower support plate; 13. Energy-absorbing spring; 14. Spring groove; 15. Guide rod; 16. Guide groove; 17. Feed inlet; 18. Conductive gap; 19. Top cover; 20. Heat-conducting part; 21. Vibrating punch; 22. Ventilation channel. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0026] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] Example 1

[0029] Firstly, a shock-absorbing structure for a bottom-discharge vibratory crusher, such as... Figure 1 As shown, the device includes a vibratory punch 21 and a guide rod 1 connected to the vibratory punch 21. An outer cylinder 2 for injecting an elastomer 4 is connected to the top surface of the vibratory punch 21. An inner cylinder 3 connected to the outer wall of the guide rod 1 is located inside the outer cylinder 2. The space between the outer cylinder 2 and the inner cylinder 3 is filled with the elastomer 4. At least three energy-absorbing springs 13 are evenly distributed in a ring around the guide rod 1 on the bottom surface of the inner cylinder 3. A lower support plate 12 is provided on the top surface of each energy-absorbing spring 13. Through the arrangement of the energy-absorbing springs 13 and the lower support plate 12, the bottom of the inner cylinder 3 can be... Vibrations in all directions received by the end are converted into elastic potential energy of the energy-absorbing spring 13. When the energy-absorbing spring 13 converts the elastic potential energy into kinetic energy, the lower support plate 12 moves along the axial direction of the guide rod 1, thereby achieving the effect of converting vibrations in all directions received by the bottom end of the inner cylinder 3 into vibrations along the axial direction of the guide rod 1. Through the setting of the energy-consuming bearing 5 and the transmission component, the vibration transmitted from the elastic body 4 to the energy-consuming bearing 5 can be converted into the rotation of the energy-consuming bearing 5 to consume the vibration generated by the vibrating punch 21.

[0030] Specifically, such as Figure 3As shown, the inner cylinder 3 is equipped with an energy-dissipating bearing 5 coaxially sleeved outside the guide rod 1. A support rod 6 is provided on the top surface of the lower support plate 12. An upper support plate 7, perpendicular to the axial direction of the guide rod 1, is provided on the top surface of the support rod 6. At least three active rollers 8, evenly distributed in a ring around the axis of the guide rod 1, are provided on the top surface of the upper support plate 7. The axial direction of the active rollers 8 is inclined to the axial direction of the energy-dissipating bearing 5, and the outer wall of the active rollers 8 is in contact with the outer wall of the energy-dissipating bearing 5. Its function is to convert vibrations in all directions experienced by the inner cylinder 3 into vibrations along the axial direction of the guide rod 1 through the support rod 6 and the upper support plate 7. Simultaneously, the support rod 6 allows the lower support plate 12 and the upper support plate 7 to have a relatively thin thickness, preventing the overall weight of the lower support plate 12, support rod 6, and upper support plate 7 from becoming too large and causing the energy-absorbing spring 13 to fail. The energy-dissipating bearing 5 converts the vibration transmitted from the lower support plate 12 to the energy-dissipating bearing 5 into rotation, thereby absorbing the vibration impact. The vibration generated by head 21; through the design of the active roller 8 and the spatial relationship between the active roller 8 and the energy dissipation bearing 5, the axial vibration of the guide rod 1 transmitted by the upper support plate 7 to the active roller 8 can be converted into rotation around the axis of the active roller 8, while the energy dissipation bearing 5 rotates around its own axis; through the design of the number of active rollers 8 and their spatial arrangement, the energy dissipation bearing 5 can be sandwiched in the middle, so that the energy dissipation bearing 5 maintains coaxiality with the guide rod 1 when rotating, and avoids the energy dissipation bearing 5 from generating eccentric vibration.

[0031] Specifically, such as Figure 1 As shown, the lower support plate 12 is an annular shape coaxial with the axis of the guide rod 1. The inner diameter of the lower support plate 12 is the same as the outer diameter of the elastic wall 301, and the outer diameter of the lower support plate 12 is the same as the inner diameter of the rigid wall 302. Spring grooves 14 for embedding local energy-absorbing springs 13 are provided on the top surface of the bottom end of the inner cylinder 3 and the bottom surface of the lower support plate 12. Their function is to prevent the lower support plate 12 from shifting in a plane perpendicular to the axis of the guide rod 1 through the design of the spring grooves 14 and the dimensional relationship between the lower support plate 12 and the inner cylinder 3, thereby ensuring that the reset stretching direction of the energy-absorbing spring 13 is parallel to the axis of the guide rod 1.

[0032] Specifically, such as Figure 2 , Figure 3 As shown, the inner wall of the inner cylinder 3 is provided with a guide rod 15 arranged parallel to the axial direction of the guide rod 1, and the lower support plate 12 is provided with a guide groove 16 with the same cross-section as the guide rod 15. The function of the guide rod 15 and the guide groove 16 is to prevent the lower support from rotating around the guide rod 1, thereby ensuring that the return stretching direction of the energy-absorbing spring 13 is parallel to the axial direction of the guide rod 1.

[0033] Specifically, such as Figure 1As shown, the inner cylinder 3 includes an elastic wall 301 for direct contact with the outer wall of the guide rod 1 and a rigid wall 302 for direct contact with the elastic body 4 inside the outer cylinder 2. The upper support plate 7 is annularly arranged coaxially with the axis of the guide rod 1. The upper support plate 7 is located between the elastic wall 301 and the rigid wall 302. The inner diameter of the upper support plate 7 is the same as the outer diameter of the elastic wall 301, and the outer diameter of the upper support plate 7 is the same as the inner diameter of the rigid wall 302. Its function is to ensure that the upper support plate 7 can only move along the axial direction of the guide rod 1 through the design of the dimensional relationship between the upper support plate 7 and the elastic wall 301, and between the upper support plate 7 and the rigid wall 302.

[0034] Specifically, such as Figure 2 As shown, the elastic wall 301 includes a rigid section 9 and a plastic section 10. A plastic section 10 is provided at each of the upper and lower ends of the rigid section 9. An embedding groove 11 for embedding the energy-dissipating bearing 5 is provided on the outer wall of the rigid section 9. Its function is to mitigate some of the vibration of the energy-dissipating bearing 5 on the elastic wall 301 along the axial direction of the guide rod 1 by providing the plastic section 10.

[0035] Specifically, such as Figure 2 As shown, the bottom surface of the support rod 6 is provided with a lower support plate 12, and an energy-absorbing spring 13 arranged parallel to the axis of the guide rod 1 is connected between the lower support plate 12 and the bottom surface of the inner cylinder 3. Its function is to support the bottom end of the support rod 6 through the setting of the lower support plate 12; and to convert the vibrations in all directions received by the bottom end of the inner cylinder 3 into the elastic potential energy of the energy-absorbing spring 13 through the setting of the energy-absorbing spring 13. When the energy-absorbing spring 13 converts the elastic potential energy into kinetic energy, the lower support plate 12 pushes the active roller 8 on the upper support plate 7 to move axially along the guide rod 1 through the support plate, thereby achieving the effect of converting the vibrations in all directions received by the bottom end of the inner cylinder 3 into vibrations along the axis of the guide rod 1.

[0036] Specifically, such as Figure 1 As shown, the bottom end of the outer cylinder 2 is connected to the top end of the vibratory punch 21. A filling gap for filling the elastic body 4 is provided between the outer cylinder 2 and the inner cylinder 3. A feed inlet 17 for communicating with the filling gap is provided between the top of the outer cylinder 2 and the guide rod 1. A conduction gap 18 is provided between the bottom end of the outer cylinder 2 and the guide rod 1. Its function is that, through the setting of the conduction gap 18, the elastic body 4 can be in direct contact with the vibratory punch 21, thereby facilitating the transmission of the vibration generated by the vibratory punch 21 to the elastic body 4.

[0037] Specifically, such as Figure 1 As shown, the inner cylinder 3 is provided with a top cover 19, and the top cover 19 is provided with a heat-conducting part 20 extending out of the feed inlet 17. The heat-conducting part 20 is annular. Its function is to transfer the heat generated when the energy-consuming bearing 5 rotates to the outside of the inner cylinder 3 through the setting of the heat-conducting part 20, so as to avoid the temperature inside the inner cylinder 3 from being too high.

[0038] The working principle of this embodiment is explained as follows: When the vibration generated by the eccentric rotation of the vibratory punch 21 is transmitted to the guide rod 1 above the vibratory punch 21, part of the vibration is transmitted to the elastic body 4 after passing through the outer cylinder 2, and another part of the vibration is directly transmitted to the elastic body 4 through the transmission gap 18. The vibration transmitted from the bottom of the elastic body 4 to the bottom of the inner cylinder 3 is transmitted upward to the bottom of the inner cylinder 3. The vibration transmitted to the bottom of the inner cylinder 3 is converted into a vibration parallel to the axis of the guide rod 1 by the spring, causing the spring to push the lower support plate 12 to move upward. At the same time, the lower support plate 12 moves upward and drives the active roller 8 on the upper support plate 7 to move upward through the support rod 6. Since the active roller 8 keeps in contact with the energy dissipation bearing 5 when it moves upward and the active roller 8 and the energy dissipation bearing 5 are inclined, the active roller 8 rotates around its own axis. The rotation of the active roller 8 is decomposed into vertical and horizontal rotation. The horizontal rotation of the active roller 8 is transmitted to the energy dissipation bearing 5, causing the energy dissipation bearing 5 to rotate around its own axis. At the same time, it is used for the setting of the embedding groove 11, which can prevent the energy dissipation bearing 5 from moving up and down.

[0039] Example 2

[0040] Firstly, a shock-absorbing structure for a bottom-discharge vibratory crusher, such as... Figure 4 As shown, the device includes a vibratory punch 21 and a guide rod 1 connected to the vibratory punch 21. An outer cylinder 2 for injecting an elastic body 4 is fitted over the guide rod 1. An inner cylinder 3, fitted over the guide rod 1, is located inside the outer cylinder 2. An energy-dissipating bearing 5, coaxially fitted over the guide rod 1, is located inside the inner cylinder 3. A transmission assembly is provided between the energy-dissipating bearing 5 and the inner cylinder 3 to allow the energy-dissipating bearing 5 to rotate around its own axis when the vibration received by the inner cylinder 3 is transmitted to it. Its function is to initially dampen the vibration transmitted from the outer cylinder 2 to the elastic body 4 through the outer cylinder 2, the inner cylinder 3, and the elastic body 4 located between them; and to convert the vibration transmitted from the elastic body 4 to the energy-dissipating bearing 5 into rotation of the energy-dissipating bearing 5, thereby dissipating the vibration generated by the vibratory punch 21.

[0041] Specifically, such as Figure 4 As shown, the inner cylinder 3 is provided with a top cover 19, and the outer cylinder 2 is provided with a ventilated channel 22 that passes through the feed inlet 17 and penetrates the elastic body 4 and the top cover 19. Its function is to balance the atmospheric pressure and temperature inside and outside the inner cylinder 3 through the ventilated channel 22.

[0042] The remaining structure and principle are the same as in Example 1.

[0043] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments based on the technical essence of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A shock-absorbing structure for a bottom-discharge vibratory crusher, comprising a vibratory head (21) and a guide rod (1) connected to the vibratory head (21), characterized in that: The top surface of the vibratory punch (21) is connected to an outer cylinder (2) for injecting elastomer (4). The outer cylinder (2) is provided with an inner cylinder (3) connected to the outer wall of the guide rod (1). The space between the outer cylinder (2) and the inner cylinder (3) is filled with elastomer (4). At least three energy-absorbing springs (13) are evenly distributed in a ring around the guide rod (1) on the bottom surface of the inner cylinder (3). The top surface of the energy-absorbing springs (13) is provided with a lower support plate (12).

2. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 1, characterized in that: The inner cylinder (3) is provided with an energy-consuming bearing (5) coaxially sleeved outside the guide rod (1). The top surface of the lower support plate (12) is provided with a support rod (6). The top surface of the support rod (6) is provided with an upper support plate (7) perpendicular to the axial direction of the guide rod (1). The top surface of the upper support plate (7) is provided with at least three active rollers (8) evenly distributed in a ring around the axis of the guide rod (1). The axial direction of the active rollers (8) is inclined to the axial direction of the energy-consuming bearing (5), and the outer wall of the active rollers (8) is in contact with the outer wall of the energy-consuming bearing (5).

3. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 2, characterized in that: The lower support plate (12) is an annular shape coaxial with the axis of the guide rod (1). The inner diameter of the lower support plate (12) is the same as the outer diameter of the elastic wall (301), and the outer diameter of the lower support plate (12) is the same as the inner diameter of the rigid wall (302). The top surface of the bottom end of the inner cylinder (3) and the bottom surface of the lower support plate (12) are provided with spring grooves (14) for embedding local energy-absorbing springs (13).

4. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 3, characterized in that: The inner wall of the inner cylinder (3) is provided with a guide rod (15) that is parallel to the axial direction of the guide rod (1), and the lower support plate (12) is provided with a guide groove (16) with the same cross-section as the guide rod (15).

5. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 2, characterized in that: The inner cylinder (3) includes an elastic wall (301) for direct contact with the outer wall of the guide rod (1) and a rigid wall (302) for direct contact with the elastic body (4) inside the outer cylinder (2). The upper support plate (7) is an annular shape coaxial with the axis of the guide rod (1). The upper support plate (7) is located between the elastic wall (301) and the rigid wall (302). The inner diameter of the upper support plate (7) is the same as the outer diameter of the elastic wall (301), and the outer diameter of the upper support plate (7) is the same as the inner diameter of the rigid wall (302).

6. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 2, characterized in that: The elastic wall (301) includes a rigid section (9) and a plastic section (10), with a plastic section (10) at each of the upper and lower ends of the rigid section (9).

7. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 6, characterized in that: The outer wall of the rigid section (9) is provided with an embedding groove (11) for embedding the energy-consuming bearing (5).

8. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 1, characterized in that: The bottom end of the outer cylinder (2) is connected to the top end of the vibratory punch (21). A filling gap for filling the elastomer (4) is provided between the outer cylinder (2) and the inner cylinder (3). A feed port (17) for communicating with the filling gap is provided between the top of the outer cylinder (2) and the guide rod (1). A conduction gap (18) is left between the bottom end of the outer cylinder (2) and the guide rod (1).

9. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone as described in claim 1, characterized in that: The inner cylinder (3) is provided with a top cover (19) and a heat-conducting part (20) extending to the outside of the feed inlet (17) is provided on the top cover (19).

10. The vibration damping structure for a bottom-discharge vibratory compactor for crushed stone according to claim 1, characterized in that: The inner cylinder (3) is provided with a top cover (19) and the outer cylinder (2) is provided with a ventilation channel (22) that passes through the feed inlet (17) and penetrates the elastomer (4) and the top cover (19).

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