An automatic deployment standing apparatus for meteorological observations

By using compression and tension springs to drive the outriggers to rotate, combined with a low center of gravity design and a parachute, the problem of automatic deployment of meteorological observation devices in extreme environments has been solved, achieving both reliability and efficiency in meteorological observation.

CN116877884BActive Publication Date: 2026-02-13AEROSPACE NEWSKY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202310769063.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-06-27
Publication Date
2026-02-13
Estimated Expiration
2043-06-27

AI Technical Summary

Technical Problem

The lack of automatically deployable, standing meteorological observation devices in existing technologies makes it impossible to conduct meteorological observations in inaccessible, extremely harsh environments.

Method used

Compression springs and tension springs drive the outriggers to rotate. Combined with a low center of gravity design and a parachute pack, the observation device can be reliably and automatically deployed. The deployment efficiency of the observation equipment is improved by a combination of sliders and rope structures, and shock absorption devices are used to buffer the impact force.

Benefits of technology

It enables the meteorological observation device to reliably and automatically stand up and deploy in extremely harsh environments, improving observation efficiency, lowering the center of gravity of the device, reducing impact, and ensuring the smooth progress of meteorological observation.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present application relates to a kind of automatic deployment standing device for meteorological observation, including cylinder, multiple sets of deployment mechanism are provided on the cylinder, the deployment mechanism includes: support leg, it is rotatably connected in the lower end of the side wall of cylinder, provide support effect for the standing of cylinder;Execution structure, one end is fixed on cylinder, the other end is connected with support leg, and power is provided for support leg movement;Opening structure, it is set on cylinder, and controllably limit the rotation of support leg.The present application is compact, reasonable, easy to operate, by using compression spring and extension spring drive support leg rotation, to provide the action force of the standing of cylinder, while the entire device adopts the design of low gravity center, realizes the reliable automatic standing deployment action of observation device, provides a possibility for air-drop meteorological observation, solves the problem that operation personnel cannot reach the scene installation when geographical conditions and other environmental factors cause, carries out meteorological observation work in the area.
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Description

TECHNICAL FIELD

[0001] The application relates to an automatic unfolding and standing device for meteorological observation. BACKGROUND

[0002] In addition to installation and implementation under the conventional ground environment, ground meteorological observation also needs to be installed in some areas where operation personnel cannot reach, such as a wild fire scene and an uninhabited area, and thus special means such as air drop must be used to place the observation equipment, so as to realize real-time observation of the environment.

[0003] At present, the automatic unfolding and standing device for meteorological observation is in a blank market in China, and with the change of the environment of meteorological observation and the new demand, the automatic unfolding and standing meteorological observation device is developed to fill the deficiency of meteorological observation in this aspect.

[0004] Therefore, the application provides an automatic unfolding and standing device for meteorological observation. SUMMARY

[0005] The application provides an automatic unfolding and standing device for meteorological observation, which adopts a compression spring and a tension spring to drive a supporting leg to rotate, thereby providing the action force for the standing of a cylinder, and the whole device adopts a low gravity center design, and realizes reliable automatic standing and unfolding of the observation device.

[0006] The technical scheme adopted by the application is as follows:

[0007] The automatic unfolding and standing device for meteorological observation comprises a cylinder, a plurality of unfolding mechanisms arranged on the cylinder, and a supporting leg.

[0008] The supporting leg is rotatably connected to the lower end of the side wall of the cylinder, and provides support for the standing of the cylinder.

[0009] The supporting leg is rotatably connected to the lower end of the side wall of the cylinder, and provides support for the standing of the cylinder.

[0010] The execution structure is fixed to the cylinder at one end and connected to the supporting leg at the other end, and provides power for the movement of the supporting leg.

[0011] The opening structure is arranged on the cylinder and can controllably limit the rotation of the supporting leg.

[0012] Further features are as follows:

[0013] The base is rotatably connected with the foot, and the base is connected with the rotating block through the first pin shaft and the shaft sleeve, and the rotating block is fixedly connected with the foot.

[0014] One end of the execution structure is fixed to the base, and the other end of the execution structure is connected with the third pin shaft, the third pin shaft is connected with the sliding end of the supporting leg, and the third pin shaft is connected with the sliding block, the sliding block is slidably connected in the sliding groove of the cylinder, and the connecting ring is connected on the sliding block, the third pin shaft is driven to displace by the extension of the execution mechanism, so that the supporting leg is displaced, and the sliding block and the connecting ring are displaced, the execution structure is a tension spring, an air spring, an electric push rod or an air cylinder.

[0015] The unfolding mechanism further comprises a buffer structure, and the buffer structure comprises a connecting ring and a tension spring two, the lower end of the tension spring two is connected with the connecting ring, and the upper end of the tension spring two is fixed on the side wall of the cylinder.

[0016] The number of the unfolding structures is greater than or equal to three, and the plurality of unfolding structures are equidistantly distributed.

[0017] The length of the foot is 1 / 3-2 / 3 of the height of the cylinder, and the maximum rotation angle between the foot and the cylinder is between 80°-100°.

[0018] The opening structure is a rudder steel wire rope assembly, wherein the rudder steel wire rope assembly comprises a rudder and a steel wire rope, the steel wire rope is wound outside the plurality of unfolding mechanisms, the rudder is connected with the steel wire rope, and the tightness of the steel wire rope is controlled.

[0019] The opening structure is an electromagnet magnet block assembly, the electromagnet magnet block assembly comprises an electromagnet and a magnet block, the electromagnet and the magnet block are connected on the cylinder and the foot respectively, and the electromagnet controls the adsorption or release of the magnet block through power supply to control the connection or not of the cylinder and the foot.

[0020] The unfolding mechanism further comprises an initial force providing structure, the initial force providing structure is connected on the side wall of the cylinder and provides an initial force for the unfolding of the foot, and the initial force providing mechanism is a compression spring, the compression spring is fixed on the lower end of the side wall of the cylinder, when the foot is at the minimum rotation angle, the foot abuts against and extrudes the compression spring to collect elastic potential energy and provide the initial force.

[0021] The upper end of the cylinder is connected with a parachute bag.

[0022] The lower end of the base is connected to a shock-absorbing device, which is a layered structure with interconnected components. From bottom to top, it consists of a shock-absorbing rubber support, a lower shock-absorbing shell, an upper shock-absorbing shell, and a shock-absorbing rubber pad. The shock-absorbing rubber pad is connected to the base. The lower end face of the shock-absorbing rubber support is trapezoidal, and multiple vertically distributed cavities are provided inside the shock-absorbing rubber support. Both the lower and upper shock-absorbing shells adopt an open-end structure, and the two open ends of the lower and upper shock-absorbing shells are nested together. At the same time, multiple vertically arranged shock-absorbing springs are provided between the lower and upper shock-absorbing shells.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention features a compact and reasonable structure, and is easy to operate. By using compression springs and tension springs to drive the support legs to rotate, it provides the force for the cylinder to stand upright. At the same time, the entire device adopts a low center of gravity design, which enables the observation device to reliably and automatically stand up and deploy. This provides a possibility for air-dropped meteorological observation and solves the problem of carrying out meteorological observation work in areas where geographical conditions and other environmental factors prevent operators from reaching the site for installation. It also facilitates meteorological personnel to carry out meteorological observation work in such extreme and harsh environments.

[0025] In addition, the present invention also has the following advantages:

[0026] (1). By setting up a compression spring and a tension spring, the compression spring pushes the rotating block to give the support leg an initial force, while the tension spring provides an instantaneous elastic contraction force to drive the support leg to move downward. Under the combined action of the two forces, the support leg quickly unfolds to a position perpendicular to the cylinder, thereby providing a force for the cylinder to stand upright.

[0027] (2). By setting up a combination of slider and rope, when the slider moves downward with the support leg, the rope pulls the observation equipment upward, so that it extends out of the cylinder, thereby improving its observation effect.

[0028] (3) The base has a certain counterweight design, which can lower the overall center of gravity. At the same time, multiple components are connected to the lower end of the side wall of the cylinder, which can lower the center of gravity to the greatest extent. In this embodiment, the lower center of gravity can be lowered vertically during airdrop, which is convenient for the subsequent shock absorption device to perform shock absorption. At the same time, the low center of gravity can better support the cylinder to stand up when the legs are unfolded.

[0029] (4). By setting up a parachute and a shock-absorbing device, the parachute opens to reduce the acceleration due to gravity. At the same time, the shock-absorbing device buffers the impact force through layers of shock-absorbing rubber support, shock-absorbing lower shell, shock-absorbing upper shell and shock-absorbing rubber pad. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the present invention.

[0031] Figure 2 It is a sectional structure schematic diagram of the present application.

[0032] Figure 3 Figure 2 It is a partial enlarged view of middle A part.

[0033] Figure 4 It is a structure schematic diagram of the present application in unfolded state.

[0034] Figure 5 It is a structure schematic diagram of the present application. Figure 4

[0035] Figure 6 It is a structure schematic diagram of embodiment 2 of the present application.

[0036] Figure 7 It is a structure schematic diagram of embodiment 3 of the present application.

[0037] Figure 8 It is a structure schematic diagram of damping device in embodiment 3 of the present application.

[0038] Wherein: 1, cylinder; 2, base; 3, first pin shaft; 4, rotating block; 5, compression spring; 6, second pin shaft; 7, first extension spring; 8, leg; 9, foot; 10, third pin shaft; 11, sliding block; 12, connecting ring; 13, second extension spring; 14, observation equipment; 15, steel wire rope; 16, steering engine; 17, magnet block; 18, electromagnet; 19, damping device; 1901, damping rubber support; 1902, damping lower shell; 1903, damping upper shell; 1904, damping rubber pad; 1905, damping spring. DETAILED DESCRIPTION

[0039] The specific embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0040] Embodiment 1

[0041] As shown in the drawings, the automatic unfolding standing device for weather observation of the present embodiment comprises a cylinder 1, and a plurality of unfolding mechanisms are arranged on the cylinder 1, wherein the unfolding mechanism comprises a foot 9, a leg 8, an execution structure and an opening structure. Figure 1 In the present embodiment, as shown in the drawings, the number of unfolding structures is greater than or equal to three, and the plurality of unfolding structures are equidistantly distributed, and in the present embodiment, five is preferred, which can facilitate the unfolding structure to drive the cylinder 1 to stand after unfolding.

[0042] Figures 1-6

[0043] ​​​Wherein the foot 9 is rotatably connected to the lower end of the side wall of the cylinder 1, providing support for the standing of the cylinder 1; the leg 8 is slidably connected to the side wall of the cylinder 1 at one end, and the other end of the leg 8 is rotatably connected to the side wall of the foot 9 through the second pin shaft 6, and the connection point is close to the lowest point of the foot 9, so as to facilitate the quick expansion of the foot 9. In the actual use process, through the comprehensive design means of overall structure layout design, part weight reduction design, part material design, foot 9 structure design, etc., the gravity center of the device is designed at a lower reasonable position, which is theoretically not higher than the height of the foot 9. In fact, the preferred gravity center height of the case is about 1 / 3 of the height of the observation device, and the height of the foot 9 is designed to be about 1 / 3-2 / 3 of the height of the observation device. At the same time, the maximum rotation angle of the foot 9 and the cylinder 1 is between 80°-100°, so that the maximum expansion angle of the foot 9 is close to 90°, and the gravity center close to the foot 9 direction can make the cylinder 1 stand up.

[0044] In this embodiment, one end of the execution structure is fixed to the cylinder 1, the other end is connected with the leg 8, and the power for the movement of the leg 8 is provided. The cylinder 1 further comprises a base 2 connected to the lower end of the cylinder 1, and one end of the execution structure is fixed to the base 2. The other end of the execution structure is connected to the sliding end of the leg 8 through the third pin shaft 10. Two execution structures are provided in each expansion mechanism, and the two execution structures are arranged on both sides of the leg 8 through the third pin shaft 10, so as to improve the power and the expansion efficiency.

[0045] In this embodiment, the execution structure is a tension spring 7, an air spring, an electric push rod or a gas cylinder. In this embodiment, the tension spring 7 is used, which can provide a large compression force in a moment to drive the leg 8 to move, thereby quickly expanding the foot 9.

[0046] The opening structure is arranged on the cylinder 1 and can controllably limit the rotation of the foot 9. The core of the automatic expansion standing device is the opening structure. The opening structure comprises a steel wire rope 15 and a rudder 16. After the foot 9 is tightened, the steel wire rope 15 is tightly fixed on the rudder 16. The mechanism of the whole system automatically expands the standing device to the initial state, i.e. the automatic standing expansion state.

[0047] The expansion mechanism further comprises an initial force providing structure connected to the lower end of the side wall of the cylinder 1 and in contact with the foot 9, and providing an initial force for the expansion of the foot 9.

[0048] In this embodiment, as Figure 3 and 5As shown, the initial force providing mechanism is a compression spring 5 fixed at five positions on the bottom of the cylinder 1, when the leg 9 is at the minimum rotation angle, the leg 9 is in contact with the compression spring 5 and collects elastic potential energy, which ensures that the rotating block 4 can compress the compression spring 5 after the leg 9 is closed, so that the compression spring 5 is stressed, providing an initial force for the automatic unfolding standing device, and the compression spring device of the initial force is designed to be selected, which is the preferred design in the present scheme. However, even if there is no initial compression spring 5 to provide an initial force, it will not affect the standing of the automatic unfolding standing device.

[0049] In the embodiment, as shown in Figure 3 and 5 As shown, the unfolding mechanism further comprises a buffer structure, the buffer structure comprises a connecting ring 12 and a second tension spring 13, the sliding end of the leg 8 is inserted with a third pin shaft 10, the third pin shaft 10 is connected with a sliding block 11, and the sliding block 11 is slidingly connected in a sliding groove formed in the cylinder 1, the upper end of the sliding block 11 is connected with the connecting ring 12, the connecting rings 12 on the plurality of unfolding mechanisms are connected with each other to form a whole, and the connecting ring 12 is connected with the second tension spring 13, and the upper end of the second tension spring 13 is fixed on the side wall of the cylinder 1, after the plurality of sliding blocks 11 are assembled, they are fixed on the connecting ring 12 through a standard part to form a whole moving mechanism, one side of the second tension spring 13 is fixed on the upper reserved hole of the connecting ring 12, and the other side is connected with a rope and hung on the cylinder wall, the second tension spring 13 device has the function of unloading the original fixed impact force, so that the automatic standing device stands more stably without impact. Among them, 5 second tension springs 13 can be preferably selected as the best buffer scheme.

[0050] The third pin shaft 10 is also connected with one end of an execution structure, and the other end of the execution structure is fixed on the base 2, and the execution structure is a first tension spring 7, an air spring, an electric push rod or an air cylinder.

[0051] An observation device 14 capable of moving in the vertical direction is arranged in the cylinder 1, and the upper end of the sliding block 11 is also connected with a rope, which is wound around a pulley connected with the cylinder 1 and connected with the observation device 14.

[0052] In the embodiment, as shown in Figure 3 Preferably, the opening structure is a rudder wire rope assembly, which comprises a rudder 16 and a wire rope 15, the wire rope 15 is wound outside the plurality of unfolding mechanisms, and the rudder 16 is connected with the wire rope 15 to control the tightness of the wire rope 15.

[0053] This embodiment discloses an automatic deployment and standing device for meteorological observation, including a cylinder 1, a base 2, a rotating block 4, and support legs 9. The cylinder 1 and the base 2 are connected and fastened by standard parts. The rotating block 4 is fixed to the base 2 by a first pin 3 and a bushing. The rotating block 4 is connected and fastened to the support legs 9 by standard parts. The base 2 has a certain counterweight design, which can lower the overall center of gravity. At the same time, multiple components are connected to the lower end of the side wall of the cylinder 1, which can lower the center of gravity to the greatest extent. In this embodiment, the lower center of gravity allows for vertical descent during airdrop, which facilitates the subsequent shock absorption device 19 for shock absorption. At the same time, the low center of gravity allows the cylinder 1 to be better supported and stood upright when the support legs 9 are deployed.

[0054] In this embodiment, a control device is also included. The control device adopts a remote control method and can be connected to the opening structure and the telescopic structure. It is used to trigger the opening structure and the telescopic structure to realize the deployment of the entire device.

[0055] Example 2

[0056] like Figure 6 As shown, unlike Embodiment 1, the wire rope servo structure in the opening structure can be replaced with an electromagnet adsorption structure. In this embodiment, five sets of electromagnets 18 are evenly distributed around the circumference and are designed to be installed and fixed on the cylinder 1. The support leg 9 is designed with a magnet block 17 that can be attracted by the electromagnet 18. The five sets of magnet blocks 17 are fixedly connected to the five sets of support legs 9 by standard fasteners. When the electromagnet 18 is energized, it can attract the support leg 9 and restrict the rotation of the support leg 9.

[0057] Example 3

[0058] Based on Example 1 or Example 2, in this example, as Figures 7-8 As shown, a parachute pack is connected to the upper end of the cylinder 1.

[0059] The lower end of the base 2 is connected to a shock-absorbing device 19, which is a layered structure with interconnected components. From bottom to top, it consists of a shock-absorbing rubber support 1901, a lower shock-absorbing shell 1902, an upper shock-absorbing shell 1903, and a shock-absorbing rubber pad 1904. The shock-absorbing rubber pad 1904 is connected to the base 2. The lower end of the shock-absorbing rubber support 1901 is trapezoidal, and multiple vertically distributed cavities are provided inside the shock-absorbing rubber support 1901. Both the lower shock-absorbing shell 1902 and the upper shock-absorbing shell 1903 adopt an open-end structure, and the two open ends of the lower shock-absorbing shell 1902 and the upper shock-absorbing shell 1903 are nested together. At the same time, multiple vertically arranged shock-absorbing springs 1905 are provided between the lower shock-absorbing shell 1902 and the upper shock-absorbing shell 1903.

[0060] To prevent damage to this meteorological observation device during deployment.

[0061] Unfolding case: after the meteorological observation device moves to the designated position, it is launched in the air, and when it descends to a certain position, the parachute bag opens, the gravitational acceleration decreases, and when the speed decreases to a predetermined size, the parachute bag is separated at this time, and the meteorological observation device is lowered due to the lower center of gravity, so it will vertically touch the ground, at this time, the shock absorbing device 19 is separated from the meteorological observation device through the layer-by-layer shock absorption of the shock absorbing rubber support 1901, the shock absorbing lower shell 1902, the shock absorbing upper shell 1903 and the shock absorbing rubber pad 1904, and the impact force is buffered, and then the shock absorbing device 19 is separated from the meteorological observation device, at this time, the meteorological observation device falls to the ground;

[0062] The deployment device is controlled by the program to open the rudder 16, and then the steel wire rope 15 bound to the support foot 9 is loosened, the compression spring 5 pushes the rotating block 4 to provide a starting force to the support foot 9, and the instantaneous elastic contraction force provided by the tension spring 7 drives the support leg 8 to move downward, the support foot 9 is quickly deployed to be perpendicular to the cylinder 1 under the joint action of the two forces, and the entire device is automatically deployed and stands up through the length design of the support leg 8 and the low center of gravity design of the entire device;

[0063] At the same time, the sliding block 11 can drive the observation equipment 14 to move upward and extend from the cylinder 1 through the traction of the rope when the support leg 8 moves downward, thereby improving the observation effect;

[0064] Under the buffering action of the tension spring 13, the automatic deployment and standing of the entire automatic deployment and standing device is more stable, so that the observation equipment 14 can timely and effectively perform observation.

[0065] The present application relates to meteorological observation equipment technical field, provide a kind of can automatically deploy and stand new meteorological observation device, solve the problem that when the operating personnel cannot reach the scene installation caused by geographical conditions and other environmental factors, carry out meteorological observation work in the area, facilitate meteorological personnel to carry out such extreme severe environment meteorological observation work.

[0066] The above description is an explanation of the present application, not a limitation of the invention, the scope defined by the present application refers to claims, within the protection scope of the present application, any form of modification can be made.

Claims

1. An automatic deployment standing device for meteorological observations, comprising a barrel (1), characterized in that: The barrel (1) is provided with a plurality of sets of unfolding mechanisms, the unfolding mechanism comprises: a foot (9) rotatably connected to the lower end of the side wall of the barrel (1) to provide support for the standing of the barrel (1); a supporting leg (8) slidably connected to the side wall of the barrel (1) at one end and rotatably connected to the foot (9) at the other end, and the foot (9) is opened by moving the supporting leg (8); an execution structure fixed at one end to the barrel (1) and connected at the other end to the supporting leg (8) to provide power for the movement of the supporting leg (8); an opening structure provided on the barrel (1) and controllably limiting the rotation of the foot (9); The barrel (1) further comprises a base (2) connected to the lower end of the barrel (1), the foot (9) is rotatably connected to the base (2), the base (2) is connected to the rotating block (4) through the first pin shaft (3) and the shaft sleeve, and the rotating block (4) is fixedly connected with the foot (9); The lower end of the base (2) is connected with a damping device (19); One end of the execution structure is fixed to the base (2), and the other end of the execution structure is connected with a third pin shaft (10), the third pin shaft (10) is connected with the sliding end of the supporting leg (8), and the third pin shaft (10) is connected with a sliding block (11), the sliding block (11) is slidably connected in a sliding groove formed in the barrel (1), and the sliding block (11) is connected with a connecting ring (12); The unfolding mechanism further comprises a buffer structure, the buffer structure comprises the connecting ring (12) and a second tension spring (13), the lower end of the second tension spring (13) is connected with the connecting ring (12), and the upper end of the second tension spring (13) is fixed on the side wall of the barrel (1).

2. An automatic deployment stand-up apparatus for meteorological observations as defined in claim 1, characterized in that: The execution structure is a first tension spring (7), an air spring, an electric push rod or an air cylinder, the displacement of the third pin shaft (10) is driven by the extension and retraction of the execution structure, thereby driving the displacement of the supporting leg (8), and the sliding block (11) and the connecting ring (12) follow the displacement.

3. An automatic deployment stand-up apparatus for meteorological observations as defined in claim 1, characterized in that: The number of the unfolding mechanisms is greater than or equal to three, and the plurality of unfolding mechanisms are equidistantly distributed.

4. An automatic deployment stand-up apparatus for meteorological observations as defined in claim 1, characterized in that: The length of the foot (9) is 1 / 3-2 / 3 of the height of the barrel (1), and the maximum rotation angle of the foot (9) and the barrel (1) is between 80°-100°.

5. An automatic deployment stand-up apparatus for meteorological observations as defined in claim 1, characterized in that: The opening structure is a rudder wire rope assembly, wherein the rudder wire rope assembly comprises a rudder (16) and a wire rope (15), the wire rope (15) is wound outside the plurality of unfolding mechanisms, the rudder (16) is connected with the wire rope (15) to control the tightness of the wire rope (15).

6. An automatic deployment stand-up apparatus for meteorological observations as defined in claim 1, characterized in that: The opening structure is an electromagnet magnet block assembly, the electromagnet magnet block assembly comprises an electromagnet (18) and a magnet block (17), the electromagnet (18) and the magnet block (17) are respectively connected to the barrel (1) and the foot (9), and the electromagnet (18) controls the adsorption or release of the magnet block (17) by energization control to control the connection or not of the barrel (1) and the foot (9).

7. An automatic deployment stander for meteorological observations as in claim 1, wherein: The unfolding mechanism further comprises an initial force providing structure connected to the side wall of the cylinder (1) and providing an initial force for unfolding of the leg (9), the initial force providing mechanism being a compression spring (5) fixed to the lower end of the side wall of the cylinder (1), when the leg (9) is at the minimum rotation angle, the leg (9) is in contact with the compression spring (5) and collects elastic potential energy and provides an initial force.

8. An automatic deployment stander for meteorological observations as in claim 1, wherein: The upper end of the cylinder (1) is connected with a parachute bag.

9. An automatic deployment stander for meteorological observations as in claim 1, wherein: The lower end of the base (2) is connected with a shock absorbing device (19), the shock absorbing device (19) is a layered structure connected with each other, from bottom to top, it is shock absorbing rubber support (1901), shock absorbing lower shell (1902), shock absorbing upper shell (1903) and shock absorbing rubber pad (1904), the shock absorbing rubber pad (1904) is connected with the base (2), the lower end surface of the shock absorbing rubber support (1901) is trapezoidal structure, and a plurality of vertical cavities are arranged in the shock absorbing rubber support (1901), the shock absorbing lower shell (1902) and the shock absorbing upper shell (1903) are both open at one end, and the two open ends of the shock absorbing lower shell (1902) and the shock absorbing upper shell (1903) are nested and connected, and a plurality of vertical shock absorbing springs (1905) are arranged between the shock absorbing lower shell (1902) and the shock absorbing upper shell (1903).

Citation Information

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