Hydraulic buffer device

Abstract

The utility model discloses a hydraulic buffering device which comprises a hydraulic cylinder barrel main body, a hydraulic buffering device, a hydraulic buffering device and a hydraulic buffering device. Hydraulic oil is stored in the hydraulic cylinder barrel main body, and the hydraulic cylinder barrel main body can seal the hydraulic oil; and the supporting device is arranged in the hydraulic cylinder barrel main body and is used for playing a supporting role. According to the hydraulic buffering device, the supporting device is arranged in the hydraulic cylinder barrel body to support the pressure valve, the interior of the hydraulic cylinder barrel body is divided into the two cavities through the pressure valve, the elastic piece is arranged to exert upward pressure on the supporting device, and the elastic force of the elastic piece and the pressure of oil liquid are kept balanced in the initial state; when the hydraulic cylinder barrel body rotates, the pressure valve slides downwards to compress the elastic piece, after the hydraulic cylinder barrel body loses power, the elastic piece pushes the pressure valve to move upwards under the action of elastic force, the buffering effect is achieved in the conversion process of elastic force reduction and oil resistance increase, and the uniform buffering effect is achieved.

Description

Technical Field

[0001] This utility model relates to the technical field of damping devices, and in particular to a hydraulic buffer device. Background Technology

[0002] A buffer device, also called a damping device, is a device used to dissipate kinetic energy. Various types of dampers (or shock absorbers) have long been used in industries such as aerospace, aviation, military, guns, and automobiles to reduce vibration and dissipate energy.

[0003] Chinese Patent Publication No. CN 108143293 B discloses a Chinese invention patent entitled "Damping Device and Device Including the Damping Device," which includes an outer casing for installation and fixation, a cover for enclosing a closed space with the outer casing, a spring plate disposed within the outer casing, and an inner core for transmitting rotational force to a hinge shaft. The spring plate includes an elastic part and a blocking part. An inner core protrusion is provided on the outer wall of the inner core. When the inner core rotates to a set position, the inner core protrusion abuts against the blocking part, and the elastic part provides elastic force to the blocking part to reduce the rotational speed of the inner core. The aforementioned damping device and device including the damping device simplify the overall structure, require fewer parts, reduce costs, and decrease the size of the device; the resistance is provided by the spring plate, allowing for greater deformation space and stronger elastic force.

[0004] However, when the inventors implemented this device, they found that the device had the following defects: it only used a spring and a blocking part to dampen the power. Because the elastic power is curved, the damping effect is poor when the initial elasticity is insufficient. As the elasticity increases, the damping degree increases, which makes opening and closing difficult.

[0005] Therefore, this application proposes a hydraulic buffer device that provides a uniform buffering effect while having a simple structure. Utility Model Content

[0006] Based on this, it is necessary to provide a hydraulic buffer device to address the aforementioned technical problems. A support device is installed inside the hydraulic cylinder body to support the pressure valve. The pressure valve divides the interior of the hydraulic cylinder body into two chambers. An adjustable valve body is installed at the top of the hydraulic cylinder body to change the internal volume. An elastic element applies upward pressure to the support device. Initially, the elastic force of the elastic element is balanced with the hydraulic pressure. When the hydraulic cylinder body rotates, the pressure valve slides down, compressing the elastic element. When the hydraulic cylinder body loses power, the elastic element pushes the pressure valve upward under the action of its elastic force. This buffering effect occurs during the transition from reduced elastic force to increased hydraulic resistance. Because the total force remains constant, this force transition is stable, achieving a uniform buffering effect.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A hydraulic damping device used for damping the motion of an object.

[0009] The hydraulic buffer device specifically includes:

[0010] The hydraulic cylinder body contains hydraulic oil and can seal the hydraulic oil.

[0011] A support device is provided inside the hydraulic cylinder body to provide support.

[0012] An adjustable valve body is disposed at the top of the hydraulic cylinder body and extends into the interior of the hydraulic cylinder body. The adjustable valve body can adjust and change the internal volume and fluid flow rate of the hydraulic cylinder body.

[0013] A pressure valve is installed inside the hydraulic cylinder body and sleeved on the upper end of the support device. The pressure valve is used to divide the interior of the hydraulic cylinder body into two cavities, and the pressure valve can move up and down and is affected by the resistance of the hydraulic oil.

[0014] An elastic element is concentrically sleeved on the support device. When the elastic element is compressed, it applies an upward pressure to the pressure valve.

[0015] In a preferred embodiment of the hydraulic buffer device provided by this utility model, the hydraulic cylinder body includes a hydraulic cylinder tube, a support rod is horizontally arranged at the center of the hydraulic cylinder tube, a sealing groove is provided on the outer surface of the hydraulic cylinder tube, and a sealing sleeve is provided on the outer surface of the hydraulic cylinder tube to cover the outer surface of the sealing groove.

[0016] In a preferred embodiment of the hydraulic buffer device provided by this utility model, mounting seats are symmetrically installed at both the upper and lower ends of the hydraulic cylinder tube, and the mounting seats are provided with through holes.

[0017] In a preferred embodiment of the hydraulic buffer device provided by this utility model, the support device includes a support rod, and the lower end of the support rod is provided with a spline shaft extending to the bottom of the hydraulic cylinder tube.

[0018] In a preferred embodiment of the hydraulic buffer device provided by this utility model, the adjustable valve body includes a connecting bushing, which is disposed at the top of the hydraulic cylinder tube. A valve core traction body is disposed inside the connecting bushing. A connecting part is disposed at the top of the valve core traction body, and a needle-shaped adjustable valve core is disposed at the bottom of the valve core traction body. The adjustable valve core extends into the interior of the pressure valve.

[0019] In a preferred embodiment of the hydraulic buffer device provided by this utility model, the connecting bushing is threadedly connected to the valve core traction body, and the outer surface of the connecting part has a threaded groove.

[0020] As a preferred embodiment of the hydraulic buffer device provided by this utility model, the pressure valve includes a sealing valve body, the outer surface of the sealing valve body is symmetrically provided with curved grooves, and a vertical limiting groove is symmetrically provided between the two curved grooves on the outer surface of the sealing valve body.

[0021] The top axis of the sealing valve body is provided with an oil volume adjustment hole, and the top edge of the sealing valve body is provided with an eccentric hole, and the interior of the eccentric hole is provided with a flow-limiting steel ball.

[0022] In a preferred embodiment of the hydraulic buffer device provided by this utility model, the support rod passes through the two curved slide grooves, and a rotatable sliding sleeve is provided on the outer surface of the support rod, which overlaps with the inner wall of the curved slide groove.

[0023] In a preferred embodiment of the hydraulic buffer device provided by this utility model, a limiting shaft is provided at the top of the support rod, and the limiting shaft extends into the interior of the vertical limiting groove.

[0024] In a preferred embodiment of the hydraulic buffer device provided by this utility model, a bearing is provided at the inner bottom of the hydraulic cylinder tube, and the bearing is mounted on the outer surface of the support rod.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The hydraulic buffer device provided by this utility model supports the pressure valve by setting a support device inside the hydraulic cylinder body. The pressure valve divides the inside of the hydraulic cylinder body into two chambers. At the same time, an adjustable valve body is set on the top of the hydraulic cylinder body to change the internal volume of the hydraulic cylinder body. An elastic element is set to exert upward pressure on the support device. In the initial state, the elastic force of the elastic element is balanced with the oil pressure. When the hydraulic cylinder body rotates, the pressure valve slides down and compresses the elastic element. When the hydraulic cylinder body loses power, the elastic element pushes the pressure valve upward under the action of elastic force. It plays a buffering role in the process of reducing elastic force and increasing oil resistance. Since the total force is constant, this force conversion is stable and achieves a uniform buffering effect.

[0027] By threading the connecting bushing and the valve core traction body, the internal cavity of the hydraulic cylinder tube and the cross-section of the channel between the adjustable valve core and the oil volume adjustment hole can be changed by altering the installation depth of the valve core traction body. With the same amount of oil, an increased cavity reduces resistance when the sealing valve body is formed, while a decreased cavity has the opposite effect. Furthermore, the lower the flow velocity of the liquid, the greater the resistance of the liquid, thus achieving the effect of adjusting the damping degree according to requirements. Attached Figure Description

[0028] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 A schematic diagram of the hydraulic buffer device provided by this utility model;

[0030] Figure 2 A front view of the hydraulic buffer device structure provided by this utility model;

[0031] Figure 3 for Figure 2 A sectional view along direction A;

[0032] Figure 4 A schematic diagram of the hydraulic cylinder pipe structure of the hydraulic buffer device provided by this utility model;

[0033] Figure 5 A schematic diagram of the internal structure of the hydraulic buffer device provided by this utility model;

[0034] Figure 6 This is a schematic diagram of the pressure valve in this utility model;

[0035] Figure 7 This is a side view of the pressure valve structure in this utility model.

[0036] The markings in the diagram are explained as follows:

[0037] 1. Hydraulic cylinder body; 101. Hydraulic cylinder tube; 102. Support rod; 103. Sealing sleeve; 104. Sealing groove; 105. Mounting base;

[0038] 2. Support device; 201. Support rod; 202. Splined shaft; 203. Limiting shaft;

[0039] 3. Adjustable valve body; 301. Connecting bushing; 302. Valve core traction body; 303. Connecting part; 304. Adjustable valve core;

[0040] 4. Pressure valve; 401. Sealing valve body; 402. Curved slide groove; 403. Vertical limit groove; 404. Eccentric hole; 405. Oil quantity regulating hole; 406. Flow limiting steel ball;

[0041] 5. Elastic components;

[0042] 6. Bearings. Detailed Implementation

[0043] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0044] As described in the background art, only springs and blocking parts are used to dampen the power. Because the elastic power is curved, the damping effect is poor when the initial elasticity is insufficient. As the elasticity increases, the damping degree increases, making opening and closing difficult.

[0045] To solve this technical problem, this utility model provides a hydraulic buffer device that is applied to damping the motion of objects.

[0046] For details, please refer to Figures 1-3 The hydraulic buffer device specifically includes:

[0047] The hydraulic cylinder body 1 contains hydraulic oil, and the hydraulic cylinder body 1 can seal the hydraulic oil.

[0048] Support device 2 is installed inside the hydraulic cylinder body 1 and serves as a support.

[0049] Adjustable valve body 3 is located at the top of hydraulic cylinder body 1 and extends into the interior of hydraulic cylinder body 1. Adjustable valve body 3 can adjust and change the internal volume and fluid flow of hydraulic cylinder body 1.

[0050] Pressure valve 4 is located inside the hydraulic cylinder body 1 and is sleeved on the upper end of the support device 2. Pressure valve 4 is used to divide the interior of the hydraulic cylinder body 1 into two cavities, and pressure valve 4 can move up and down and is affected by the resistance of hydraulic oil.

[0051] The elastic element 5 is concentrically sleeved on the support device 2. When the elastic element 5 is compressed, it applies upward pressure to the pressure valve 4.

[0052] The hydraulic buffer device provided by this utility model has a support device 2 inside the hydraulic cylinder body 1 to support the pressure valve 4. The pressure valve 4 divides the inside of the hydraulic cylinder body 1 into two chambers. At the same time, an adjustable valve body 3 is set on the top of the hydraulic cylinder body 1 to change the internal volume of the hydraulic cylinder body 1. An elastic element 5 is set to exert upward pressure on the support device 2. In the initial state, the elastic force of the elastic element 5 is balanced with the pressure of the oil. When the hydraulic cylinder body 1 rotates, the pressure valve 4 slides down and compresses the elastic element 5. When the hydraulic cylinder body 1 loses power, the elastic element 5 pushes the pressure valve 4 upward under the action of the elastic force. It plays a buffering role in the process of reducing the elastic force and increasing the oil resistance. Since the total force is constant, this force conversion is stable and achieves a uniform buffering effect.

[0053] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0054] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0055] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0056] Example 1

[0057] Please refer to Figures 1-3A hydraulic buffer device includes a hydraulic cylinder body 1, a support device 2, an adjustable valve body 3, a pressure valve 4, and an elastic element 5. The hydraulic cylinder body 1 stores hydraulic oil and can seal the hydraulic oil, thereby providing hydraulic resistance. The support device 2 is located inside the hydraulic cylinder body 1 and supports the pressure valve 4, constraining its movement and maintaining uniform and stable motion. The adjustable valve body 3 is located at the top of the hydraulic cylinder body 1 and extends into its interior, sealing the upper port of the hydraulic cylinder body 1. The adjustable valve body 3 can adjust and change the internal volume and fluid flow rate of the hydraulic cylinder body 1, thereby changing the resistance of the hydraulic oil under pressure. Pressure valve 4 is located inside the hydraulic cylinder body 1 and is sleeved on the upper end of the support device 2. Pressure valve 4 is used to divide the interior of the hydraulic cylinder body 1 into two cavities. When the hydraulic cylinder body 1 rotates, pressure valve 4 can move up and down according to the limit of support device 2 and is affected by the resistance of hydraulic oil. Elastic element 5 is concentrically sleeved on support device 2. When elastic element 5 is compressed, it applies upward pressure to pressure valve 4. Initially, the elastic force of elastic element 5 is balanced with the pressure of hydraulic oil. When pressure valve 4 moves down, elastic element 5 is compressed and its elastic force is greater than the hydraulic resistance of hydraulic oil. When elastic element 5 releases its elastic force, it gradually returns to the balance between elastic force of elastic element 5 and hydraulic oil resistance.

[0058] Please refer to Figures 3-7 The hydraulic cylinder body 1 includes a hydraulic cylinder tube 101. A support rod 102 is horizontally positioned at the center of the hydraulic cylinder tube 101. A sealing groove 104 is provided on the outer surface of the hydraulic cylinder tube 101, and a sealing sleeve 103 covers the outer surface of the sealing groove 104. The support rod 102 can be installed inside the hydraulic cylinder tube 101 by insertion, and the connection is sealed by the sealing sleeve 103. After the support rod 102 is removed, the sealing valve body 401 can be disassembled and maintained.

[0059] The support device 2 includes a support rod 201, which can be a smooth rod and mainly serves to constrain the pressure valve 4 and the elastic element 5. The lower end of the support rod 201 is provided with a splined shaft 202 extending to the bottom of the hydraulic cylinder tube 101. The splined shaft 202 can be used to seal the bottom of the hydraulic cylinder tube 101 and can be connected to the mounting surface through the splined shaft 202.

[0060] The pressure valve 4 includes a sealing valve body 401. The outer surface of the sealing valve body 401 is symmetrically provided with curved grooves 402. When the curved grooves 402 engage with the support rod 102, and the hydraulic cylinder pipe 101 or the support rod 201 rotates, the sealing valve body 401 will be subjected to the pressure of the support rod 102 and will move up and down. An oil flow adjustment hole 405 is provided at the top axis of the sealing valve body 401.

[0061] The adjustable valve body 3 includes a connecting sleeve 301, which is located at the top of the hydraulic cylinder tube 101. A valve core traction body 302 is disposed inside the connecting sleeve 301, and an adjustable valve core 304 is disposed at the bottom of the valve core traction body 302. The adjustable valve core 304 extends through the oil flow regulating hole 405 into the interior of the sealing valve body 401. The adjustable valve core 304 is needle-shaped, with a smaller diameter at the bottom and a larger diameter at the top. By changing the depth to which the adjustable valve core 304 is inserted into the oil flow regulating hole 405, the cross-section of the oil flow regulating hole 405 is changed, thereby altering the flow rate.

[0062] An eccentric hole 404 is provided on the top edge of the sealing valve body 401. A flow-limiting steel ball 406 is installed inside the eccentric hole 404, forming a single channel. When the sealing valve body 401 moves downwards, because the outer surface of the sealing valve body 401 is in contact with the inner wall of the hydraulic cylinder tube 101, the hydraulic oil can only enter slowly into the upper cavity through the oil flow regulating hole 405, creating resistance and applying pressure to the elastic element 5. When the sealing valve body 401 moves upwards, the top of the sealing valve body 401 will be resisted by the hydraulic oil inside the upper cavity. At this time, the hydraulic oil will pass through the cross-section of the oil flow regulating hole 405 and squeeze the flow-limiting steel ball 406 through the eccentric hole 404, forming a release resistance and stabilizing the return to the initial state. To prevent the flow-limiting steel ball 406 from falling off, a retaining ring can be used for restriction.

[0063] Example 2

[0064] The hydraulic buffer device provided in Example 1 is further optimized, specifically, as follows: Figures 3-5 As shown, the support rod 102 passes through two curved slide grooves 402, thus a single support rod 102 can limit the track of the sealing valve body 401 and support the sealing valve body 401. A rotatable sleeve is provided on the outer surface of the support rod 102, and the sleeve overlaps with the inner wall of the curved slide groove 402. Due to the rotatable sleeve, the lifting and lowering of the sealing valve body 401 is smoother. At the same time, the sleeve and hydraulic system greatly reduce the friction between the support rod 102 and the curved slide groove 402, thereby improving service life.

[0065] To further improve the stability of the lifting and lowering of the sealing valve body 401, a limiting shaft 203 is provided at the top of the support rod 201, and a vertical limiting groove 403 is symmetrically provided between two curved slide grooves 402 on the outer surface of the sealing valve body 401, with the limiting shaft 203 extending into the interior of the vertical limiting groove 403.

[0066] Through the above structural design, the angle of the sealing valve body 401 can be further limited by the cooperation of the limiting shaft 203 and the vertical limiting groove 403, so that the sealing valve body 401 can only move vertically up and down, and avoids rotation.

[0067] The upper and lower ends of the hydraulic cylinder tube 101 are symmetrically equipped with mounting bases 105. The mounting bases 105 are provided with through holes to facilitate the installation of the entire hydraulic buffer device in the required position.

[0068] Example 3

[0069] The hydraulic buffer device provided in Embodiment 1 or 2 is further optimized, such as... Figures 1-3 and Figure 5 As shown, a connecting part 303 is provided on the top of the valve core traction body 302, and the installation height of the valve core traction body 302 can be adjusted by rotating the connecting part 303.

[0070] To facilitate adjustment of the height of the valve core traction body 302, the connecting bushing 301 is threadedly connected to the valve core traction body 302. This threaded connection allows for easy adjustment of the valve core traction body 302's installation height simply by rotation. The outer surface of the connecting part 303 has threaded grooves for anti-slip purposes. Additionally, the connecting part 303 can be engaged with an object to limit its movement.

[0071] A bearing 6 is installed at the inner bottom of the hydraulic cylinder tube 101, and the bearing 6 is mounted on the outer surface of the support rod 201. When the hydraulic cylinder tube 101 changes angle, the bearing 6 can greatly reduce friction and improve service life.

[0072] This hydraulic buffer device can be used on objects that need to be opened and closed to achieve automatic closing, reduce the impact force when closing, and achieve safety and quiet operation.

[0073] The hydraulic buffer device provided by this utility model is used as follows:

[0074] Mounting base 105 is installed on one of the two objects that need to be opened and closed, and spline shaft 202 and connecting part 303 are installed on the other object, so that the two objects rotate around the hydraulic buffer device as the rotation axis. In the initial state of the hydraulic buffer device, the spring force provided by elastic element 5 and the hydraulic pressure provided by hydraulic oil form two forces in opposite directions; when the two objects are initially closed, the spring force is equal to the hydraulic resistance, and the two objects need to be manually driven; when closed to about 90 degrees, the sealing valve body 401 moves downward under the pressure of the support rod 102, the spring force begins to be greater than the hydraulic resistance, and the two objects can rotate automatically; when closed to about 10 degrees, the hydraulic resistance increases, the spring force decreases, which can slow down the closing speed of the two objects, thereby achieving silent closing.

[0075] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0076] Obviously, the embodiments described above are only some embodiments of this utility model, not all embodiments. The accompanying drawings show preferred embodiments of this utility model, but do not limit the patent scope of this utility model. This utility model can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this utility model specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this utility model.

Claims

1. A hydraulic buffer device, characterized in that, It includes: The hydraulic cylinder body (1) contains hydraulic oil and can seal the hydraulic oil. Support device (2), which is installed inside the hydraulic cylinder body (1) and serves as a support; Adjustable valve body (3), the adjustable valve body (3) is disposed on the top of the hydraulic cylinder body (1) and extends into the hydraulic cylinder body (1), the adjustable valve body (3) can adjust and change the internal volume and liquid flow of the hydraulic cylinder body (1); Pressure valve (4) is located inside the hydraulic cylinder body (1) and sleeved on the upper end of the support device (2). The pressure valve (4) is used to divide the interior of the hydraulic cylinder body (1) into two chambers. The pressure valve (4) can move up and down and is affected by the resistance of the hydraulic oil. The elastic element (5) is concentrically sleeved on the support device (2). When the elastic element (5) is compressed, it applies an upward pressure to the pressure valve (4).

2. The hydraulic buffer device according to claim 1, characterized in that, The hydraulic cylinder body (1) includes a hydraulic cylinder tube (101), a support rod (102) is horizontally arranged at the center of the hydraulic cylinder tube (101), a sealing groove (104) is provided on the outer surface of the hydraulic cylinder tube (101), and a sealing sleeve (103) is provided on the outer surface of the hydraulic cylinder tube (101) to cover the outer surface of the sealing groove (104).

3. The hydraulic buffer device according to claim 2, characterized in that, The upper and lower ends of the hydraulic cylinder tube (101) are symmetrically equipped with mounting seats (105), and the mounting seats (105) are provided with through holes.

4. The hydraulic buffer device according to claim 2, characterized in that, The support device (2) includes a support rod (201), the lower end of which is provided with a splined shaft (202) extending to the bottom of the hydraulic cylinder tube (101).

5. The hydraulic buffer device according to claim 4, characterized in that, The adjustable valve body (3) includes a connecting bushing (301) which is disposed at the top of the hydraulic cylinder tube (101). A valve core traction body (302) is disposed inside the connecting bushing (301). A connecting part (303) is disposed at the top of the valve core traction body (302). A needle-shaped adjustable valve core (304) is disposed at the bottom of the valve core traction body (302). The adjustable valve core (304) extends into the interior of the pressure valve (4).

6. The hydraulic buffer device according to claim 5, characterized in that, The connecting bushing (301) is threadedly connected to the valve core traction body (302), and the outer surface of the connecting part (303) has a threaded groove.

7. The hydraulic buffer device according to claim 6, characterized in that, The pressure valve (4) includes a sealing valve body (401), and curved grooves (402) are symmetrically arranged on the outer surface of the sealing valve body (401). Vertical limiting grooves (403) are symmetrically arranged between the two curved grooves (402) on the outer surface of the sealing valve body (401). The top axis of the sealing valve body (401) is provided with an oil quantity adjustment hole (405), the adjustable valve core (304) extends from the oil quantity adjustment hole (405) into the interior of the sealing valve body (401), the top edge of the sealing valve body (401) is provided with an eccentric hole (404), and the interior of the eccentric hole (404) is provided with a flow-limiting steel ball (406).

8. The hydraulic buffer device according to claim 7, characterized in that, The support rod (102) passes through the two curved slide grooves (402), and the outer surface of the support rod (102) is provided with a rotatable sliding sleeve, which overlaps with the inner wall of the curved slide groove (402).

9. The hydraulic buffer device according to claim 7, characterized in that, The top of the support rod (201) is provided with a limiting shaft (203), which extends into the interior of the vertical limiting groove (403).

10. The hydraulic buffer device according to claim 4, characterized in that, The inner bottom of the hydraulic cylinder tube (101) is provided with a bearing (6), which is mounted on the outer surface of the support rod (201).

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