Adjustable multi-spring buffering hydraulic oil cylinder

Abstract

The utility model discloses an adjustable multi-spring buffering hydraulic oil cylinder, which relates to the technical field of hydraulic oil cylinder buffering and comprises a cylinder body, a base is fixedly connected to the bottom of the cylinder body, a sealing cover is fixedly connected to the top of the cylinder body, a piston rod is slidably connected in the cylinder body and the sealing cover, and a buffering mechanism is arranged at the top of the base. The buffering mechanism comprises a first buffering assembly and a second buffering assembly, the first buffering assembly and the second buffering assembly are used in cooperation, the first buffering assembly comprises a lifting frame, and the outer side of the cylinder body is sleeved with the lifting frame. According to the adjustable multi-spring buffering hydraulic oil cylinder, through the arranged buffering mechanism, the oil cylinder can be buffered, meanwhile, buffering force can be effectively adjusted, the mechanical adjusting mode is simple and reliable, the adjustable multi-spring buffering hydraulic oil cylinder can adapt to different load and impact working conditions without disassembly, the structure is simple, and practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder buffer technology, and in particular to an adjustable multi-spring buffer hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] A search revealed a hydraulic cylinder with a buffer mechanism (authorization announcement number: CN 219101758 U), which "includes a hydraulic cylinder, a hydraulic rod and an oil pipe connector on the hydraulic cylinder, a protective structure slidably sleeved on the hydraulic cylinder, a connecting ring fixedly installed on the protective structure, a buffer structure slidably installed on the connecting ring, and a lubrication structure fixedly installed on one side of the hydraulic rod. This invention, through the setting of a first buffer spring, a second auxiliary spring, and other structures, can protect the hydraulic rod while it moves, thereby preventing dust and impurities from adhering to the hydraulic rod when it extends, and thus preventing impurities from being brought into the hydraulic cylinder during extension and retraction. Furthermore, the first buffer spring and the second auxiliary spring provide a buffering effect during the reciprocating motion of the hydraulic rod, thereby preventing wear or damage when the hydraulic rod moves too quickly and contacts the inner wall of the hydraulic cylinder."

[0004] Based on the aforementioned technologies, the applicant believes that although the technologies can utilize springs for buffering, they cannot adjust the buffering force of the springs, and there are still some shortcomings in actual use. In response to the above problems, we have introduced an adjustable multi-spring buffer hydraulic cylinder. Utility Model Content

[0005] This utility model discloses an adjustable multi-spring buffer hydraulic cylinder, which aims to solve the technical problem that although springs can be used for buffering, the buffering force of the springs cannot be adjusted.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An adjustable multi-spring buffer hydraulic cylinder includes a cylinder body, a base fixedly connected to the bottom of the cylinder body, a sealing cover fixedly connected to the top of the cylinder body, a piston rod slidably connected inside the cylinder body and the sealing cover, and a buffer mechanism provided on the top of the base. The buffer mechanism includes a first buffer assembly and a second buffer assembly, which cooperate with each other. The first buffer assembly includes a lifting frame, which is sleeved on the outside of the cylinder body and slidably connected to the cylinder body. Sliding rods are symmetrically slidably connected inside the lifting frame. The tops of both sliding rods are fixedly connected to the bottom of the sealing cover, and the bottoms of both sliding rods are fixedly connected to the top of the base. Threaded grooves are provided on the outer sides of both sliding rods. Lower buffer springs are sleeved on the outer sides of both sliding rods. Internal threaded blocks are threadedly connected to the outer sides of both sliding rods and below the lower buffer springs. Limiting plates are fixedly connected to the tops of both internal threaded blocks, and the limiting plates are slidably connected to the sliding rods.

[0008] The buffer mechanism not only buffers the hydraulic cylinder but also effectively adjusts the buffering force. This mechanical adjustment method is simple and reliable, adaptable to different loads and impact conditions without disassembly, and has a simple structure and strong practicality.

[0009] In a preferred embodiment, the second buffer assembly includes two sliding columns, both of which are slidably connected inside the sealing cover. The bottom of each of the two sliding columns is fixedly connected to the top of the lifting frame. A top plate is fixedly connected to the outside of the piston rod. The bottom of the top plate is fixedly connected to the top of the sliding columns. Fixed plates are symmetrically fixedly connected to the top of the top plate. Upper buffer springs are sleeved on the outside of each of the two sliding columns and between the sealing cover and the top plate.

[0010] The second buffer assembly, through the linkage between the sliding column and the top plate, buffers the return stroke of the piston rod under the action of the upper buffer spring. The fixed plate further disperses the pressure, forming a double buffer mechanism, reducing the vibration of the piston rod during movement and extending the sealing life of the sealing cover and cylinder.

[0011] In a preferred embodiment, the interior of the lifting frame is slidably connected with a reinforcing column in a rectangular shape. The top of the reinforcing column is fixedly connected to the bottom of the sealing cover, and the bottom of the reinforcing column is fixedly connected to the top of the base.

[0012] The rectangular sliding fit between the column and the lifting frame is strengthened, which improves the rigidity of the overall structure, prevents the lifting frame from tilting, ensures the vertical movement accuracy of the slide rod and slide column, and at the same time shares the lateral stress of the cylinder.

[0013] In a preferred embodiment, mounting plates are symmetrically fixedly connected to the outer side of the base, and fixing holes are provided inside both mounting plates.

[0014] The mounting plate and fixing holes facilitate the quick installation and fixing of the hydraulic cylinder. The symmetrical design balances the force on the base, avoiding buffer failure caused by unstable installation.

[0015] In a preferred embodiment, a cushioning pad for buffering is fixedly connected to the bottom of the base, and the main material of the cushioning pad is silicone.

[0016] The silicone buffer pad absorbs high-frequency vibrations between the base and the mounting surface, reducing noise and minimizing damage to the cylinder from rigid contact.

[0017] In a preferred embodiment, the top of the piston rod is fixedly connected to a mounting head that facilitates connection between the hydraulic cylinder and external equipment, and a connecting rod is installed inside the mounting head.

[0018] The mounting head and connecting rod simplify the connection process between the piston rod and external equipment, and improve compatibility and maintenance efficiency through standardized interfaces.

[0019] The adjustable multi-spring buffer hydraulic cylinder provided by this utility model has the following advantages:

[0020] Firstly, the buffer mechanism not only buffers the hydraulic cylinder but also effectively adjusts the buffering force. This mechanical adjustment method is simple and reliable, adaptable to different loads and impact conditions without disassembly, and has a simple structure and strong practicality.

[0021] Secondly, the rectangular sliding fit between the column and the lifting frame is strengthened, improving the overall structural rigidity, preventing the lifting frame from tilting, ensuring the vertical movement accuracy of the sliding rod and column, and simultaneously sharing the lateral stress of the cylinder. The mounting plate and fixing holes facilitate quick installation and fixing of the cylinder, and the symmetrical design balances the force on the base, avoiding buffer failure due to unstable installation. The silicone buffer pad absorbs high-frequency vibrations between the base and the mounting surface, reducing noise and minimizing damage to the cylinder from rigid contact. The mounting head and connecting rod simplify the connection process between the piston rod and external equipment, improving adaptability and maintenance efficiency through standardized interfaces. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of an adjustable multi-spring buffer hydraulic cylinder proposed in this utility model.

[0023] Figure 2 This is a three-dimensional bottom view of an adjustable multi-spring buffer hydraulic cylinder proposed in this utility model.

[0024] Figure 3 This is a front view schematic diagram of an adjustable multi-spring buffer hydraulic cylinder proposed in this utility model.

[0025] Figure 4This is a three-dimensional schematic diagram of the buffer mechanism of an adjustable multi-spring buffer hydraulic cylinder proposed in this utility model.

[0026] Figure 5 This utility model proposes an adjustable multi-spring buffer hydraulic cylinder. Figure 1 A magnified diagram of point A.

[0027] In the attached diagram: 1. Cylinder body; 2. Base; 3. Sealing cover; 4. Piston rod; 51. Lifting frame; 52. Slide rod; 53. Lower buffer spring; 54. Threaded groove; 55. Internal threaded block; 56. Limiting plate; 57. Slide column; 58. Top plate; 59. Upper buffer spring; 510. Fixing plate; 6. Reinforcing column; 7. Mounting plate; 8. Fixing hole; 9. Buffer pad; 10. Mounting head; 11. Connecting rod. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and marked in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0029] The adjustable multi-spring buffer hydraulic cylinder disclosed in this utility model is mainly used in hydraulic cylinder buffering scenarios.

[0030] Reference Figures 1-5An adjustable multi-spring buffer hydraulic cylinder includes a cylinder body 1, a base 2 fixedly connected to the bottom of the cylinder body 1, and a sealing cover 3 fixedly connected to the top of the cylinder body 1. A piston rod 4 is slidably connected inside the cylinder body 1 and the sealing cover 3. A buffer mechanism is provided on the top of the base 2, the buffer mechanism including a first buffer assembly and a second buffer assembly, which cooperate with each other. The first buffer assembly includes a lifting frame 51, which is sleeved on the outside of the cylinder body 1 and slidably connected to the cylinder body 1. The interior of the base 1 is symmetrically connected with sliding rods 52. The tops of the two sliding rods 52 are fixedly connected to the bottom of the sealing cover 3, and the bottoms of the two sliding rods 52 are fixedly connected to the top of the base 2. The outer sides of the two sliding rods 52 are provided with threaded grooves 54, and the outer sides of the two sliding rods 52 are fitted with lower buffer springs 53. The outer sides of the two sliding rods 52 and below the lower buffer springs 53 are threadedly connected with internal threaded blocks 55. The tops of the two internal threaded blocks 55 are fixedly connected with limit plates 56, and the limit plates 56 and the sliding rods 52 are slidably connected. The second buffer assembly includes two sliding columns 57, both of which are slidably connected inside the sealing cover 3. The bottom of each sliding column 57 is fixedly connected to the top of the lifting frame 51. A top plate 58 is fixedly connected to the outside of the piston rod 4. The bottom of the top plate 58 is fixedly connected to the top of the sliding column 57. A fixed plate 510 is symmetrically fixedly connected to the top of the top plate 58. An upper buffer spring 59 is sleeved on the outside of each sliding column 57 and between the sealing cover 3 and the top plate 58.

[0031] In this embodiment: During the return stroke, the top plate 58 presses down on the upper buffer spring 59 and transmits the force to the lifting frame 51 through the sliding column 57, causing it to slide down along the sliding rod 52 and compress the lower buffer spring 53. The buffering force is mainly adjusted by rotating the internal thread block 55. Since the internal thread block 55 engages with the threaded groove 54 on the sliding rod 52, it can move up and down along the sliding rod 52 during rotation, thereby changing the position of the limiting plate 56 and adjusting the initial pre-compression of the lower buffer spring 53. When the internal thread block 55 rotates upward, the lower buffer spring 53 is further compressed, providing a stronger buffering force; conversely, rotating downward reduces the pre-compression and decreases the buffering strength. Through the buffering mechanism, not only can the hydraulic cylinder be buffered, but the buffering force can also be effectively adjusted. This mechanical adjustment method is simple and reliable, and can adapt to different loads and impact conditions without disassembly. It has a simple structure and strong practicality.

[0032] In the above technical solution, considering the problem that although springs can be used for cushioning, the cushioning force of the springs cannot be adjusted, the specific operation is as follows to solve this problem:

[0033] Reference Figures 1-5In a preferred embodiment, the lifting frame 51 has a rectangular sliding reinforcing column 6 inside, the top of the reinforcing column 6 is fixedly connected to the bottom of the sealing cover 3, and the bottom of the reinforcing column 6 is fixedly connected to the top of the base 2. Mounting plates 7 are symmetrically fixedly connected to the outer side of the base 2, and each mounting plate 7 has a fixing hole 8 inside. A buffer pad 9 for cushioning is fixedly connected to the bottom of the base 2; the main material of the buffer pad 9 is silicone. A mounting head 10 for connecting the cylinder to external equipment is fixedly connected to the top of the piston rod 4, and a connecting rod 11 is installed inside the mounting head 10.

[0034] In this embodiment, the rectangular sliding fit between the reinforced column 6 and the lifting frame 51 enhances the rigidity of the overall structure, prevents the lifting frame 51 from tilting, ensures the vertical movement accuracy of the sliding rod 52 and the sliding column 57, and simultaneously shares the lateral stress of the cylinder body 1. The mounting plate 7 and fixing holes 8 facilitate the quick installation and fixing of the hydraulic cylinder. The symmetrical design balances the force on the base 2, preventing buffer failure due to unstable installation. The silicone buffer pad 9 absorbs high-frequency vibrations between the base 2 and the mounting surface, reducing noise and minimizing damage to the cylinder body 1 from rigid contact. The mounting head 10 and connecting rod 11 simplify the connection process between the piston rod 4 and external equipment, improving adaptability and maintenance efficiency through standardized interfaces.

[0035] Working principle: When the hydraulic cylinder is working, the piston rod 4 extends or retracts under hydraulic drive, driving the top plate 58 to move. During the return stroke, the top plate 58 compresses the upper buffer spring 59 and transmits the force to the lifting frame 51 through the slide column 57, causing it to slide down the slide rod 52 and compress the lower buffer spring 53. The buffer force is mainly adjusted by rotating the internal thread block 55. Since the internal thread block 55 meshes with the threaded groove 54 on the slide rod 52, it can move up and down along the slide rod 52 during rotation, thereby changing the position of the limit plate 56 and adjusting the initial pre-compression of the lower buffer spring 53. When the textured block 55 rotates upward, the lower buffer spring 53 is further compressed, providing stronger buffering force; conversely, rotating downward reduces the pre-compression and decreases the buffering strength. This mechanical adjustment method is simple and reliable, and can adapt to different loads and impact conditions without disassembly. The reinforcing column 6 maintains the stability of the lifting frame 51 and prevents skewing, while the silicone buffer pad 9 absorbs residual vibration and reduces rigid impact. The mounting head 10 is rigidly connected to the external equipment to ensure power transmission efficiency. The overall structure achieves adjustable buffering through the synergistic action of multiple springs to meet diverse application needs.

[0036] The above description is merely a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. The substitutions may be replacements of some structures, devices, or method steps, or they may be complete technical solutions. Equivalent substitutions or modifications made based on the technical solution and inventive concept of this utility model should all be covered within the protection scope of this utility model.

Claims

1. An adjustable multi-spring cushioning hydraulic cylinder comprising a cylinder body (1), characterized in that: The bottom of the cylinder (1) is fixedly connected with a base (2), the top of the cylinder (1) is fixedly connected with a sealing cover (3), the inside of the cylinder (1) and the sealing cover (3) is slidably connected with a piston rod (4), the top of the base (2) is provided with a buffer mechanism, the buffer mechanism comprises a first buffer assembly and a second buffer assembly, and the first buffer assembly and the second buffer assembly are used in cooperation. The first buffer assembly comprises a lifting frame (51), the lifting frame (51) is sleeved on the outside of the cylinder (1), the lifting frame (51) is slidably connected with the cylinder (1), the inside of the lifting frame (51) is symmetrically and slidably connected with slide rods (52), the top of the two slide rods (52) is fixedly connected with the bottom of the sealing cover (3), the bottom of the two slide rods (52) is fixedly connected with the top of the base (2), the outside of the two slide rods (52) is provided with a threaded groove (54), the outside of the two slide rods (52) is sleeved with a lower buffer spring (53), the outside of the two slide rods (52) and below the lower buffer spring (53) is threadedly connected with an internal threaded block (55), the top of the two internal threaded blocks (55) is fixedly connected with a limiting disc (56), and the limiting disc (56) and the slide rod (52) are slidably connected.

2. The adjustable multi-spring cushion hydraulic cylinder according to claim 1, wherein: The second buffer assembly comprises slide columns (57), the two slide columns (57) are slidably connected in the inside of the sealing cover (3), the bottom of the two slide columns (57) is fixedly connected with the top of the lifting frame (51), the outside of the piston rod (4) is fixedly connected with a top plate (58), the bottom of the top plate (58) is fixedly connected with the top of the slide column (57), the top of the top plate (58) is fixedly connected with a fixed disc (510) in a symmetrical mode, the outside of the two slide columns (57) and between the sealing cover (3) and the top plate (58) is sleeved with an upper buffer spring (59).

3. The adjustable multi-spring cushion hydraulic cylinder according to claim 1, wherein: The inside of the lifting frame (51) is slidably connected with a reinforcing column (6) in a rectangular mode, the top of the reinforcing column (6) is fixedly connected with the bottom of the sealing cover (3), and the bottom of the reinforcing column (6) is fixedly connected with the top of the base (2).

4. The adjustable multi-spring cushion hydraulic cylinder of claim 1, wherein: The outside of the base (2) is fixedly connected with mounting plates (7) in a symmetrical mode, the inside of the two mounting plates (7) is provided with a fixed hole (8).

5. The adjustable multi-spring cushion hydraulic cylinder of claim 1, wherein: The bottom of the base (2) is fixedly connected with a buffer pad (9) for buffering, and the main material of the buffer pad (9) is silica gel.

6. The adjustable multi-spring cushion hydraulic cylinder of claim 1, wherein: The top of the piston rod (4) is fixedly connected with a mounting head (10) for facilitating the connection of the oil cylinder with external equipment, and the inside of the mounting head (10) is provided with a connecting rod (11).

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