Buffer with adjustable damping level

Abstract

The application discloses a buffer with adjustable buffer level, comprising a hydraulic buffer tank, and an adjusting structure arranged on the side of the hydraulic buffer tank, the adjusting structure comprising: an outer cylinder, an oil guide pipe connected between the bottom of the outer cylinder and the hydraulic buffer tank; a sealing piston arranged in the inner cavity of the outer cylinder, the top end of the sealing piston being fixedly connected with a T-shaped connecting rod; a nut seat fixedly connected to the top end of the outer cylinder, a threaded rod threadedly connected to the inner side of the nut seat, and a limiting sliding groove being formed in the bottom end of the threaded rod; and a second compression spring sleeved outside the T-shaped connecting rod. The outer cylinder arranged on the outside of the hydraulic buffer tank, in cooperation with the sealing piston, the T-shaped connecting rod and the second compression spring arranged on the outer cylinder, can play an auxiliary buffering role. Meanwhile, the nut seat and the threaded rod arranged on the outer cylinder, in cooperation with the limiting sliding groove matched with the T-shaped connecting rod formed in the bottom end of the threaded rod, can limit the ascending height of the sealing piston, so as to realize the adjustment of the buffer level, and make the buffer meet the use requirements.

Description

Technical Field

[0001] This invention relates to the field of buffer technology, and in particular to buffers with adjustable buffer levels. Background Technology

[0002] The buffer is an elevator safety device that provides a final layer of safety protection. It is installed in the elevator shaft pit, directly below the car and counterweight. When the elevator is moving up or down, if it exceeds the bottom or top floor due to broken wire rope, traction friction, insufficient braking force of the brake, or failure of the control system, the buffer will act as a buffer to prevent the elevator car or counterweight from directly hitting the bottom or top, thus protecting the safety of passengers and equipment.

[0003] Existing buffers have a fixed buffering level, which cannot be adjusted according to specific usage requirements. This often necessitates replacing existing buffers with higher or lower buffering levels when changes in buffering requirements occur, resulting in limited functionality and an inability to meet the diverse buffering needs of modern applications. Therefore, there is an urgent need to provide buffers with adjustable buffering levels to address the problem of the current lack of such functionality. Summary of the Invention

[0004] The purpose of this invention is to provide a buffer with adjustable buffer level to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a buffer with adjustable buffer level, including a hydraulic buffer tank, wherein the side of the hydraulic buffer tank is provided with an adjustment structure for adjusting its buffer level;

[0006] The adjustment structure includes:

[0007] The outer cylinder has an oil guide pipe connecting its bottom to the hydraulic buffer tank for communication between their inner cavities. Both the outer cylinder and the hydraulic buffer tank are filled with hydraulic oil.

[0008] A sealing piston is slidably disposed in the inner cavity of the outer cylinder, and a T-shaped connecting rod is fixedly connected to the top end of the sealing piston;

[0009] A nut seat is fixedly connected to the top of the outer cylinder. A threaded rod is threadedly connected to the inner side of the nut seat. A limiting groove matching the T-shaped connecting rod is opened at the bottom end of the threaded rod. An anti-slip rotating handle is fixedly connected to the top end of the threaded rod.

[0010] The second compression spring is sleeved on the outside of the T-shaped connecting rod, and its two ends are fixedly connected to the opposite side of the T-shaped connecting rod and the outer cylinder, respectively.

[0011] Preferably, the hydraulic buffer tank includes a tank body, and a first piston rod is slidably connected to the inner cavity of the tank body. The top of the first piston rod passes through the top of the tank body and extends to the upper position. An elastic tension spring is sleeved on the outer wall of the first piston rod, and the two ends of the elastic tension spring are fixedly connected to the first piston rod and the opposite side of the tank body, respectively.

[0012] Preferably, a frustum top seat is fixedly connected to the top of the first piston rod, and a first compression spring is sleeved on the top of the outer wall of the first piston rod. The two ends of the first compression spring are fixedly connected to the frustum top seat and the opposite side of the tank body, respectively.

[0013] Preferably, an auxiliary buffer structure is fixedly connected to the top of the hydraulic buffer tank, and a mounting plate is fixedly connected to the bottom of the hydraulic buffer tank and the adjustment structure. Mounting holes for fixing the mounting plate are provided at the corners of the mounting plate.

[0014] Preferably, the auxiliary buffer structure includes a lower plate and an upper plate, the upper plate being disposed above the lower plate, and a first auxiliary buffer mechanism being disposed between the upper plate and the lower plate.

[0015] Preferably, the first auxiliary buffer mechanism includes four rotatable and foldable connecting rods, which are respectively rotatably connected to the corners between the upper plate and the lower plate. A connecting plate is fixedly connected to the middle of two adjacent connecting rods, and an elastic element is provided between the two connecting plates.

[0016] Preferably, the elastic element includes a hollow plate, both ends of which are slidably connected to linear slide rods. The opposite ends of the two linear slide rods are respectively fixedly connected to the middle of the corresponding connecting plate, and the opposite ends of the two linear slide rods are fixedly connected to a third compression spring.

[0017] Preferably, the outer wall of the linear slide bar is provided with external threads, and the outer wall of the linear slide bar is connected to a second limiting nut through the external threads.

[0018] Preferably, the connecting rod includes two hinged rods, the opposite ends of the two hinged rods are rotatably connected to the opposite side of the lower plate and the upper plate, respectively, the intersecting ends of the two hinged rods are rotatably connected to a connecting shaft, one end of the connecting shaft is fixedly connected to the end face of the connecting plate, the end of the connecting shaft away from the connecting plate is threaded with a first limiting nut, and a washer is sleeved on the outer wall of the connecting shaft at the position of the end face of the connecting plate.

[0019] Preferably, a second auxiliary buffer mechanism is provided between the bottom end of the hollow plate and the lower plate. The second auxiliary buffer mechanism includes a telescopic tube, the two ends of which are fixedly connected to the opposite side of the hollow plate and the lower plate, respectively. A fourth compression spring is sleeved on the outer wall of the telescopic tube.

[0020] Compared with the prior art, the technical effects and advantages of the present invention are as follows:

[0021] (1) The present invention uses an outer cylinder connected to the outside of the hydraulic buffer tank to allow the hydraulic oil in the hydraulic buffer tank and the outer cylinder to communicate with each other. In addition, the sealing piston, T-shaped connecting rod and second compression spring on the outer cylinder can play an auxiliary buffering role, increasing the buffering effect of the hydraulic buffer tank. At the same time, the nut seat and threaded rod on the outer cylinder, together with the limiting slide groove opened at the bottom of the thread that matches the T-shaped connecting rod, can limit the rising height of the sealing piston, realize the adjustment of the internal volume of the outer cylinder, and thus realize the adjustment of the buffering level to meet the usage requirements.

[0022] (2) The present invention can further buffer the hydraulic buffer tank by setting an auxiliary buffer structure above the hydraulic buffer tank, thereby increasing the overall buffer performance. At the same time, the second limiting nut connected to the outer wall of the linear slide bar by the external thread can adjust the elastic limit of the third compression spring, thereby achieving further adjustment of the buffer level and improving the use effect of the buffer.

[0023] (3) In this invention, the fourth compression spring and telescopic tube set between the connecting plate and the lower plate can drive the connecting plate to move downward when the auxiliary buffer structure is used for buffering, so that the connecting plate squeezes the telescopic tube and the fourth compression spring, so that the fourth compression spring can further play an auxiliary buffering role, thereby further improving the buffering effect of the buffer and improving its quality of use. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a side sectional view of the hydraulic buffer tank of the present invention.

[0026] Figure 3 This is a top-view cross-sectional view of the first auxiliary buffer mechanism of the present invention.

[0027] Figure 4 For the present invention Figure 1 A magnified schematic diagram of the structure at point A.

[0028] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at point B.

[0029] Figure 6 This is a front view of the auxiliary buffer structure of the present invention.

[0030] In the diagram: 1. Hydraulic buffer tank; 11. Tank body; 12. First piston rod; 13. Elastic tension spring; 14. First compression spring; 15. Frustum top seat; 16. Mounting plate; 17. Mounting hole; 2. Adjustment structure; 21. Outer cylinder; 22. Sealing piston; 23. T-shaped connecting rod; 24. Nut seat; 25. Threaded rod; 26. Limiting groove; 27. Second compression spring; 28. Anti-slip handle; 29. ​​Oil guide pipe; 3. Auxiliary buffer structure; 31. Lower plate; 32. Upper plate; 33. First auxiliary buffer mechanism; 331. Hinge rod; 332. Connecting plate; 333. Connecting shaft; 334. First limiting nut; 335. Hollow plate; 336. Gasket; 337. Third compression spring; 338. Linear slide rod; 3381. Second limiting nut; 34. Fourth compression spring; 35. Telescopic fitting. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. 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 are within the scope of protection of the present invention.

[0032] This invention provides, for example Figure 1-6 The buffer with adjustable buffer level shown includes a hydraulic buffer tank 1. The side of the hydraulic buffer tank 1 is provided with an adjustment structure 2 for adjusting its buffer level. In a preferred embodiment, two adjustment structures 2 can be provided and arranged symmetrically on the left and right sides, increasing the adjustability and further improving the buffering effect. The adjustment structure 2 includes:

[0033] The outer cylinder 21 has an oil guide pipe 29 connecting its bottom to the hydraulic buffer tank 1 for communication between their inner cavities. Both the outer cylinder 21 and the hydraulic buffer tank 1 are filled with hydraulic oil, so that when the hydraulic buffer tank 1 is subjected to impact and compression, the hydraulic oil can be discharged into the outer cylinder 21 for buffering.

[0034] The sealing piston 22 is slidably disposed in the inner cavity of the outer cylinder 21. A T-shaped connecting rod 23 is fixedly connected to the top of the sealing piston 22. When the hydraulic oil level in the outer cylinder 21 rises, the sealing piston 22 is squeezed and driven to move upward. This process not only plays a buffering role, but also serves as a connection role, allowing the hydraulic oil to push the T-shaped connecting rod 23 upward.

[0035] Nut seat 24 is fixedly connected to the top of outer cylinder 21. Threaded rod 25 is threadedly connected to the inner side of nut seat 24. The bottom end of threaded rod 25 has a limiting groove 26 that matches T-shaped connecting rod 23. Anti-slip handle 28 is fixedly connected to the top of threaded rod 25. By using the threaded connection between nut seat 24 and threaded rod 25, the threaded rod 25 can be adjusted up and down by rotation. In conjunction with the limiting groove 26 at the bottom of threaded rod 25, the height of T-shaped connecting rod 23 can be limited, thereby limiting the buffer level of hydraulic buffer tank 1. At the same time, the buffer level can be adjusted by adjusting the up and down position of threaded rod 25.

[0036] The second compression spring 27 is sleeved on the outside of the T-shaped connecting rod 23. The two ends of the second compression spring 27 are fixedly connected to the opposite side of the T-shaped connecting rod 23 and the outer cylinder 21, respectively. The second compression spring 27 can drive the T-shaped connecting rod 23 to compress and deform when it moves upward, thus playing an auxiliary buffering role and increasing the buffering effect of the hydraulic buffer tank 1.

[0037] In a preferred embodiment, the hydraulic buffer tank 1 includes a tank body 11. A first piston rod 12 is slidably connected to the inner cavity of the tank body 11. The top of the first piston rod 12 passes through the top of the tank body 11 and extends to the upper position. When the first piston rod 12 is subjected to impact and squeezing force, it moves downward and can squeeze out the hydraulic oil in the tank body 11. During the squeezing process, it can play a buffering role. An elastic tension spring 13 is sleeved on the outer wall of the first piston rod 12. The two ends of the elastic tension spring 13 are fixedly connected to the first piston rod 12 and the opposite side of the tank body 11, respectively. A frustum top seat 15 is fixedly connected to the top of the first piston rod 12. A first compression spring 14 is sleeved on the top of the outer wall of the first piston rod 12. The two ends of the first compression spring 14 are fixedly connected to the frustum top seat 15 and the opposite side of the tank body 11, respectively. The combined use of the first compression spring 14 and the elastic tension spring 13 can play a double buffering role for the first piston rod 12, thereby further enhancing the buffering performance of the hydraulic buffer tank 1.

[0038] In a preferred embodiment, an auxiliary buffer structure 3 is fixedly connected to the top of the hydraulic buffer tank 1, and a mounting plate 16 is fixedly connected to the bottom of the hydraulic buffer tank 1 and the adjusting structure 2. Mounting holes 17 for fixing the mounting plate 16 are provided at the corners of the mounting plate 16. The auxiliary buffer structure 3 includes a lower plate 31 and an upper plate 32. The upper plate 32 is located above the lower plate 31. A first auxiliary buffer mechanism 33 is provided between the upper plate 32 and the lower plate 31. When the upper plate 32 is impacted, it moves downward and compresses the first auxiliary buffer mechanism 33, thereby buffering the compressive force during the deformation process and achieving the auxiliary buffering effect on the hydraulic buffer tank 1.

[0039] In a preferred embodiment, the first auxiliary buffer mechanism 33 includes four rotatable and foldable connecting rods. The four connecting rods are rotatably connected to the corners between the upper plate 32 and the lower plate 31. A connecting plate 332 is fixedly connected to the middle of two adjacent connecting rods. An elastic element is provided between the two connecting plates 332. The elastic element includes a hollow plate 335. Both ends of the hollow plate 335 are slidably connected to linear slide rods 338. The opposite ends of the two linear slide rods 338 are fixedly connected to the middle of the corresponding connecting plate 332. The opposite ends of the two linear slide rods 338 are fixedly connected to a third compression spring 337. When the upper plate 32 is pressed down, the middle of the connecting rods rotates, causing the hollow plate 335 to move downward. At the same time, the middle position of the two sets of connecting rods shortens, causing the linear slide rods 338 in the elastic element to move towards each other, compressing the third compression spring 337 between them, causing it to undergo elastic deformation and buffering the impact force.

[0040] In a preferred embodiment, the outer wall of the linear slide bar 338 is provided with an external thread, and a second limiting nut 3381 is threadedly connected to the outer wall of the linear slide bar 338 through the external thread. The external thread on the outer wall of the linear slide bar 338 allows the second limiting nut 3381 to be threadedly connected to it. In this way, by rotating and adjusting the position of the second limiting nut 3381 on the outer wall of the linear slide bar 338, the distance that the linear slide bar 338 can extend into the hollow plate 335 can be adjusted and limited, thereby adjusting the elastic deformation of the third compression spring 337 and thus playing the role of assisting in adjusting the buffer level.

[0041] In a preferred embodiment, the connecting rod includes two hinge rods 331. The opposite ends of the two hinge rods 331 are rotatably connected to the opposite side of the lower plate 31 and the upper plate 32, respectively. The intersecting ends of the two hinge rods 331 are rotatably connected to a connecting shaft 333. One end of the connecting shaft 333 is fixedly connected to the end face of the connecting plate 332. The end of the connecting shaft 333 away from the connecting plate 332 is threaded with a first limiting nut 334. A washer 336 is sleeved on the outer wall of the connecting shaft 333 at the end face of the connecting plate 332. The ends of two adjacent hinge rods 331 are limited by the insertion of the connecting shaft 333 and the limiting of the first limiting nut 334, so that the two hinge rods 331 can rotate on the outer wall of the connecting shaft 333, and the upper plate 32 is pressed down by force.

[0042] In a preferred embodiment, a second auxiliary buffer mechanism is provided between the bottom end of the hollow plate 335 and the lower plate 31. The second auxiliary buffer mechanism includes a telescopic tube 35, with both ends of the telescopic tube 35 fixedly connected to the opposite side of the hollow plate 335 and the lower plate 31, respectively. A fourth compression spring 34 is sleeved on the outer wall of the telescopic tube 35. The telescopic tube 35 can be an ordinary telescopic tube or a damper. The cooperation between the telescopic tube 35 and the fourth compression spring 34 can utilize the inertia of the hollow plate 335 moving downward when the auxiliary buffer structure 3 is subjected to pressure to squeeze the telescopic tube 35, causing the telescopic tube 35 to contract. At the same time, the fourth spring 34 is compressed and deformed, which plays an auxiliary buffering role in the downward movement of the hollow plate 335, thereby further enhancing the overall buffering effect of the buffer.

[0043] Working principle of this invention: The external impact force directly contacts the auxiliary buffer structure 3 on the hydraulic buffer tank 1. After initial buffering by the auxiliary buffer structure 3, the first piston rod 12 in the hydraulic buffer tank 1 moves downward, the first compression spring 14 is compressed and deformed, and the elastic tension spring 13 is stretched and deformed, thus buffering the impact force. At the same time, during the downward movement of the first piston rod 12, the hydraulic oil inside the tank body 11 is squeezed, causing the hydraulic oil to enter the outer cylinder 21 of the adjusting structure 2 from the oil guide pipe 29. The increase in hydraulic oil in the outer cylinder 21 pushes the sealing piston 22 and the T-shaped connecting rod 23 upward. In conjunction with the compression deformation of the second compression spring 27 between the T-shaped connecting rod 23 and the outer cylinder 21, the auxiliary buffering effect of the hydraulic buffer tank 1 is achieved. At the same time, as the T-shaped connecting rod 23 continues to move upward, when the top of the T-shaped connecting rod 23 moves to the threaded rod... When the T-shaped connecting rod 23 is in the innermost position of the limiting groove 26 at the bottom of the 25, the limiting effect of the limiting groove 26 prevents the T-shaped connecting rod 23 from moving further, and the hydraulic oil cannot continue to enter the outer cylinder 21. This prevents the first compression spring 14, the elastic tension spring 13, and the second compression spring 27 from deforming further, thereby limiting the buffer level. When the buffer level needs to be adjusted, the operator only needs to manually rotate the threaded rod 25 clockwise or counterclockwise through the anti-slip handle 28. The nut seat 24 fixed at the top of the outer cylinder 21 is threadedly connected to the threaded rod 25, allowing the threaded rod 25 to move up or down while rotating. This allows the height of the limiting groove 26 at the bottom of the threaded rod 25 to be adjusted. Thus, the buffer level can be adjusted according to the different limiting positions of the limiting groove 26 on the T-shaped connecting rod 23. The operation is simple and convenient, and easy to use.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention 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 embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A buffer with adjustable buffer level, comprising a hydraulic buffer tank (1), characterized in that, The hydraulic buffer tank (1) is provided with an adjustment structure (2) on its side for adjusting its buffer level. The adjustment structure (2) includes: The outer cylinder (21) is connected to the bottom of the hydraulic buffer tank (1) by an oil guide pipe (29) for communicating the inner cavities of the two. Both the outer cylinder (21) and the hydraulic buffer tank (1) are filled with hydraulic oil. A sealing piston (22) is slidably disposed in the inner cavity of the outer cylinder (21), and a T-shaped connecting rod (23) is fixedly connected to the top of the sealing piston (22). Nut seat (24) is fixedly connected to the top of the outer cylinder (21). The inner side of the nut seat (24) is threaded with a threaded rod (25). The bottom end of the threaded rod (25) is provided with a limiting groove (26) that matches the T-shaped connecting rod (23). The top end of the threaded rod (25) is fixedly connected with an anti-slip handle (28). The second compression spring (27) is sleeved on the outside of the T-shaped connecting rod (23), and the two ends of the second compression spring (27) are fixedly connected to the opposite side of the T-shaped connecting rod (23) and the outer cylinder (21); An auxiliary buffer structure (3) is fixedly connected to the top of the hydraulic buffer tank (1). The auxiliary buffer structure (3) includes a lower plate (31) and an upper plate (32). The upper plate (32) is located above the lower plate (31). A first auxiliary buffer mechanism (33) is provided between the upper plate (32) and the lower plate (31). The first auxiliary buffer mechanism (33) includes four rotatable and foldable connecting rods. The four connecting rods are rotatably connected to the corners between the upper plate (32) and the lower plate (31). A connecting plate is fixedly connected to the middle of two adjacent connecting rods. 332), an elastic element is provided between the two connecting plates (332), the elastic element includes a hollow plate (335), both ends of the hollow plate (335) are slidably connected with linear slide rods (338), the opposite ends of the two linear slide rods (338) are respectively fixedly connected to the middle of the corresponding connecting plate (332), the opposite ends of the two linear slide rods (338) are fixedly connected with a third compression spring (337), the outer wall of the linear slide rod (338) is provided with an external thread, and the outer wall of the linear slide rod (338) is threaded with a second limiting nut (3381) through the external thread.

2. The buffer with adjustable buffer level according to claim 1, characterized in that, The hydraulic buffer tank (1) includes a tank body (11), and a first piston rod (12) is slidably connected to the inner cavity of the tank body (11). The top of the first piston rod (12) passes through the top of the tank body (11) and extends to the upper position. An elastic tension spring (13) is sleeved on the outer wall of the first piston rod (12). The two ends of the elastic tension spring (13) are fixedly connected to the first piston rod (12) and the opposite side of the tank body (11), respectively.

3. The buffer with adjustable buffer level according to claim 2, characterized in that, The top of the first piston rod (12) is fixedly connected to a frustum top seat (15), and a first compression spring (14) is sleeved on the top of the outer wall of the first piston rod (12). The two ends of the first compression spring (14) are fixedly connected to the frustum top seat (15) and the opposite side of the tank body (11), respectively.

4. The buffer with adjustable buffer level according to claim 1, characterized in that, The bottom of the hydraulic buffer tank (1) and the adjustment structure (2) are fixedly connected to the mounting plate (16), and the mounting plate (16) is provided with mounting holes (17) for fixing the mounting plate (16) at the corners.

5. The buffer with adjustable buffer level according to claim 4, characterized in that, The connecting rod includes two hinge rods (331). The opposite ends of the two hinge rods (331) are rotatably connected to the opposite side of the lower plate (31) and the upper plate (32), respectively. The intersecting ends of the two hinge rods (331) are rotatably connected to a connecting shaft (333). One end of the connecting shaft (333) is fixedly connected to the end face of the connecting plate (332). The end of the connecting shaft (333) away from the connecting plate (332) is threaded with a first limiting nut (334). A washer (336) is sleeved on the outer wall of the connecting shaft (333) at the end face of the connecting plate (332).

6. The buffer with adjustable buffer level according to claim 5, characterized in that, A second auxiliary buffer mechanism is provided between the bottom end of the hollow plate (335) and the lower plate (31). The second auxiliary buffer mechanism includes a telescopic tube (35). The two ends of the telescopic tube (35) are fixedly connected to the opposite side of the hollow plate (335) and the lower plate (31), respectively. A fourth compression spring (34) is sleeved on the outer wall of the telescopic tube (35).

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