Hydraulic oil cylinder with buffering and flow limiting mechanism

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a hydraulic oil cylinder with a buffer flow limiting mechanism, which comprises a hydraulic rod, a hydraulic sleeve, an oil inlet pipe and an oil inlet barrel, a second buffer block is fixed on the right side of the hydraulic rod, and guide components are arranged at the upper and lower positions of the side edge of a movable rod. The second buffer block is installed on the side edge of the hydraulic rod, the first buffer spring is installed on the side edge of the second buffer block, and the first buffer spring is used for completing connection work between the first buffer block and the second buffer block. A first sleeve rod and a second sleeve rod are distributed at the upper position and the lower position between the first buffer block and the second buffer block, a movable rod moves in an inserting groove in the second sleeve rod in the moving process, a third buffer spring correspondingly contracts, guiding work is formed through cooperation of a guiding assembly, and therefore under connection of the first sleeve rod and the second sleeve rod, the first buffer block and the second buffer block can be separated from each other. Therefore, the buffering device has certain buffering capacity in the working process, and the orientation capacity during buffering is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder with a buffering and current limiting mechanism. Background Art

[0002] Hydraulic cylinders are important components in hydraulic systems. They can convert hydraulic energy into mechanical energy to drive various machines and equipment. The structure of a hydraulic cylinder is usually composed of a cylinder body, a piston, seals, and connectors. It uses the flow of hydraulic oil to transmit pressure and power. It is widely used in engineering machinery, mining machinery, metallurgical machinery and other fields.

[0003] The hydraulic cylinder needs to be equipped with a buffer device to limit the flow, mainly to avoid the piston hitting the cylinder head when it reaches the end of the stroke, generating noise, affecting the accuracy of the piston movement, and even damaging the machine parts. Therefore, when the hydraulic cylinder is used, the use of a buffer flow limiting mechanism is particularly important. When using a buffer block or buffer spring to form a buffering work, there is a tendency for excessive vibration to occur, which makes it difficult to ensure the stability of the buffering effect, and thus directly affects the buffering effect. Utility Model Content

[0004] The purpose of the present utility model is to provide a hydraulic cylinder with a buffer flow limiting mechanism to solve the problem proposed in the above background technology that the use of the buffer flow limiting mechanism is particularly important, and when using a buffer block or a buffer spring to perform a buffering operation, there is a tendency for excessive oscillation to occur, thereby making it difficult to ensure a stable buffering effect, which in turn directly affects the buffering effect.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a hydraulic cylinder with a buffering and current limiting mechanism, comprising a hydraulic rod, a hydraulic sleeve, an oil inlet pipe, and an oil inlet cylinder. A second buffer block is fixed to the right side of the hydraulic rod, one side of the second buffer block is connected to a first buffer spring, one side of the first buffer spring is connected to the first buffer block, one side of the first buffer block is fixed with an adhesive layer, one side of the adhesive layer is connected to a rubber block, a first set of rods are installed at the upper and lower positions of the side of the second buffer block, a second set of rods is inserted inside the first set of rods, a slot is opened in one side of the second set of rods, a movable rod is inserted in the slot, the outside of the movable rod is connected to a third buffer spring, and a guide assembly is provided at the upper and lower positions of the side of the movable rod.

[0006] Preferably, an adhesive connection is formed between the adhesive layer and the rubber block, and the outer side wall of the rubber block is coated with an anti-corrosion layer.

[0007] Preferably, the guide assembly includes a guide block and a guide rail, the guide rail is installed at upper and lower positions in the slot, and the guide block is installed at upper and lower positions on the side of the movable rod.

[0008] Preferably, the guide blocks are symmetrically distributed about the central axis of the movable rod, and the guide rails are symmetrically distributed about the central axis of the slot.

[0009] Preferably, the first set of rods are symmetrically distributed about the horizontal center axis of the second buffer block, and the second set of rods are symmetrically distributed about the center axis of the first buffer block.

[0010] Preferably, one side of the third buffer spring is elastically connected to one side of the inner wall of the first sleeve rod, and the other side of the third buffer spring is elastically connected to the side position of the second sleeve rod.

[0011] Preferably, a limit plate is installed near the bottom of the oil inlet cylinder, a reserved groove is opened in the middle position of the limit plate, a hemispherical block is provided in the reserved groove, connecting frames are installed on both sides of the bottom of the hemispherical block, the bottom of the connecting frame is connected to a telescopic sleeve rod, the bottom of the telescopic sleeve rod is installed with a mounting plate, and the outside of the telescopic sleeve rod is connected to a second buffer spring.

[0012] Preferably, the second buffer spring is located between the connecting frame and the mounting plate, and the connecting frame is symmetrically distributed about the central axis of the limiting plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the hydraulic cylinder with a buffer flow limiting mechanism not only improves stability, but also improves the side protection capability and flow limiting effect;

[0014] (1) The second buffer block is installed at the side of the hydraulic rod, the first buffer spring is installed at the side of the second buffer block, and the first buffer spring is used to complete the connection between the first buffer block and the second buffer block. The first set of rods and the second set of rods are distributed at the upper and lower positions between the first buffer block and the second buffer block. The first set of rods and the second set of rods form a sleeve connection. Therefore, when the position of the first buffer block at the tail end forms an impact, the first buffer spring forms a compression buffer while the second set of rods moves inside the first set of rods. When moving, the movable rod moves in the slot in the second set of rods, and the third buffer spring contracts accordingly. The guide assembly cooperates to form a guiding work. In this way, under the connection between the first set of rods and the second set of rods, it has a certain buffering capacity during the working process and improves the directional ability during buffering;

[0015] (2) The rubber block is bonded and fixed to the side of the first buffer block by using the adhesive layer. Therefore, when the hydraulic rod is hydraulically extended or retracted, and an impact occurs on the side of the hydraulic rod, the rubber block directly contacts the inner wall of the hydraulic sleeve, thereby improving the overall side protection capability during operation.

[0016] (3) The tail end of the oil inlet pipe is connected to the oil inlet cylinder, and the limit plate is assembled near the bottom of the oil inlet cylinder. When the oil enters the oil inlet cylinder at the position of the oil inlet pipe, the hemispherical block gradually squeezes the second buffer spring under the influence of the oil gravity, and the telescopic sleeve is correspondingly extended and retracted. Therefore, the hemispherical block will gradually move down in the reserved groove until the exposed gap of the reserved groove increases, thereby improving the flow limiting effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 2 This is a partial front view structural diagram of the first buffer block of the present invention;

[0019] Figure 3 This is a schematic diagram of a partial front cross-sectional structure of the oil inlet cylinder of the present utility model;

[0020] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged cross-section structure at point A in the middle.

[0021] In the figure: 1. Hydraulic rod; 2. Hydraulic sleeve; 3. Oil inlet pipe; 4. Oil inlet cylinder; 5. First buffer block; 6. First buffer spring; 7. Second buffer block; 8. Adhesive layer; 9. Rubber block; 10. Hemispherical block; 11. Limit plate; 12. Connecting frame; 13. Second buffer spring; 14. Reserved groove; 15. Telescopic sleeve; 16. Mounting plate; 17. First sleeve; 18. Second sleeve; 19. Guide assembly; 20. Movable rod; 21. Third buffer spring. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] See also Figure 1-4The utility model provides an embodiment: a hydraulic cylinder with a buffering and current limiting mechanism, including a hydraulic rod 1, a hydraulic sleeve 2, an oil inlet pipe 3, and an oil inlet cylinder 4. A second buffer block 7 is fixed to the right side of the hydraulic rod 1, one side of the second buffer block 7 is connected to a first buffer spring 6, one side of the first buffer spring 6 is connected to a first buffer block 5, one side of the first buffer block 5 is fixed with an adhesive layer 8, one side of the adhesive layer 8 is connected to a rubber block 9, a first set of rods 17 are installed at the upper and lower positions of the side of the second buffer block 7, a second set of rods 18 are inserted inside the first set of rods 17, a slot is opened in one side of the second set of rods 18, a movable rod 20 is inserted in the slot, the outside of the movable rod 20 is connected to a third buffer spring 21, and a guide assembly 19 is provided at the upper and lower positions of the side of the movable rod 20.

[0024] An adhesive connection is formed between the adhesive layer 8 and the rubber block 9, and the outer side wall of the rubber block 9 is coated with an anti-corrosion layer.

[0025] The guide assembly 19 includes a guide block and a guide rail. The guide rail is installed at upper and lower positions in the slot, and the guide block is installed at upper and lower positions on the side of the movable rod 20.

[0026] The guide blocks are symmetrically distributed about the central axis of the movable rod 20 , and the guide rails are symmetrically distributed about the central axis of the slot.

[0027] The first set of rods 17 are symmetrically distributed about the horizontal center axis of the second buffer block 7 , and the second set of rods 18 are symmetrically distributed about the center axis of the first buffer block 5 .

[0028] One side of the third buffer spring 21 is elastically connected to one side of the inner wall of the first sleeve rod 17 , and the other side of the third buffer spring 21 is elastically connected to the side position of the second sleeve rod 18 .

[0029] A limit plate 11 is installed near the bottom of the oil inlet cylinder 4, and a reserved groove 14 is opened in the middle position of the limit plate 11. A hemispherical block 10 is arranged in the reserved groove 14. Connecting frames 12 are installed on both sides of the bottom of the hemispherical block 10. The bottom of the connecting frame 12 is connected to a telescopic sleeve rod 15. The bottom of the telescopic sleeve rod 15 is installed with a mounting plate 16. The outside of the telescopic sleeve rod 15 is connected to a second buffer spring 13.

[0030] The second buffer spring 13 is located between the connecting frame 12 and the mounting plate 16 , and the connecting frame 12 is symmetrically distributed about the central axis of the limiting plate 11 ;

[0031] Further, a valve can be installed in the oil inlet pipe 3 according to the needs to control the opening and closing of the initial flow;

[0032] Furthermore, the outer side wall of the rubber block 9 is coated with an anti-corrosion layer to increase the service life of the rubber block 9 .

[0033] Working principle: First, during operation, the adhesive layer 8 is used to adhere the rubber block 9 to the side of the first buffer block 5. Therefore, during operation, when the hydraulic rod 1 undergoes hydraulic expansion and contraction, and an impact or the like occurs on the side of the hydraulic rod 1, the rubber block 9 directly contacts the inner wall of the hydraulic sleeve 2. At the same time, the first buffer spring 6 forms a compression buffer, and the second set of rods 18 moves inside the first set of rods 17. When the movable rod 20 moves in the slot in the second set of rods 18, and the third buffer spring 21 is correspondingly Contraction, and the guide assembly 19 cooperates to form a guiding work, so that under the connection of the first set of rods 17 and the second set of rods 18, the buffering work is completed, and the tail end of the oil inlet pipe 3 is connected to the oil inlet cylinder 4, and the oil is fed into the oil inlet cylinder 4 at the position of the oil inlet pipe 3. Under the influence of the gravity of the oil, the hemispherical block 10 gradually squeezes the second buffer spring 13 to compress, and the telescopic sleeve rod 15 correspondingly expands and contracts. Therefore, the hemispherical block 10 will gradually move down in the reserved groove 14 until the exposed gap of the reserved groove 14 increases, thereby completing the flow limiting oil inlet work.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

Claims

1. A hydraulic oil cylinder with a buffer flow limiting mechanism, comprising a hydraulic rod (1), a hydraulic sleeve (2), an oil inlet pipe (3), and an oil inlet cylinder (4), characterized in that: A second buffer block (7) is fixed to the right side of the hydraulic rod (1), one side of the second buffer block (7) is connected to a first buffer spring (6), one side of the first buffer spring (6) is connected to a first buffer block (5), one side of the first buffer block (5) is fixed to an adhesive layer (8), one side of the adhesive layer (8) is connected to a rubber block (9), a first set of rods (17) are installed at upper and lower positions on the side of the second buffer block (7), a second set of rods (18) is inserted inside the first set of rods (17), a slot is provided on one side of the second set of rods (18), a movable rod (20) is inserted in the slot, the outside of the movable rod (20) is connected to a third buffer spring (21), and a guide assembly (19) is provided at upper and lower positions on the side of the movable rod (20).

2. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 1, characterized in that: An adhesive connection is formed between the adhesive layer (8) and the rubber block (9), and the outer side wall of the rubber block (9) is coated with an anti-corrosion layer.

3. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 1, characterized in that: The guide assembly (19) comprises a guide block and a guide rail, wherein the guide rail is installed at upper and lower positions in the slot, and the guide block is installed at upper and lower positions on the side of the movable rod (20).

4. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 3, characterized in that: The guide blocks are symmetrically distributed about the central axis of the movable rod (20), and the guide rails are symmetrically distributed about the central axis of the slot.

5. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 1, characterized in that: The first set of rods (17) are symmetrically distributed about the horizontal center axis of the second buffer block (7), and the second set of rods (18) are symmetrically distributed about the center axis of the first buffer block (5).

6. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 1, characterized in that: One side of the third buffer spring (21) is elastically connected to one side of the inner wall of the first sleeve rod (17), and the other side of the third buffer spring (21) is elastically connected to the side position of the second sleeve rod (18).

7. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 1, characterized in that: A limit plate (11) is installed at a position near the bottom of the oil inlet cylinder (4), a reserved groove (14) is opened at a middle position of the limit plate (11), a hemispherical block (10) is installed in the reserved groove (14), connecting frames (12) are installed on both sides of the bottom of the hemispherical block (10), the bottom of the connecting frame (12) is connected to a telescopic sleeve rod (15), the bottom of the telescopic sleeve rod (15) is installed with a mounting plate (16), and the outside of the telescopic sleeve rod (15) is connected to a second buffer spring (13).

8. The hydraulic cylinder with a buffer and flow limiting mechanism according to claim 7, characterized in that: The second buffer spring (13) is located between the connecting frame (12) and the mounting plate (16), and the connecting frame (12) is symmetrically distributed about the central axis of the limiting plate (11).

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