Buffer type self-sealing adjustable hydraulic cylinder

Abstract

The utility model relates to hydraulic pressure oil cylinder technical field, concretely relates to a buffer formula self -sealing adjustable hydraulic pressure oil cylinder, including cylinder, cylinder bottom and piston head, the inside of cylinder is provided with piston rod, the one end of piston head is installed in piston rod, the one end fixed mounting of piston head has auxiliary rod, the other end fixed mounting of piston head has main rod, cylinder bottom fixed mounting is in one end of cylinder, the other end fixed mounting of cylinder has cylinder head, the inside of cylinder bottom is opened and has vertical channel, the outside wall one side of cylinder bottom is opened and has liquid inlet. In the utility model, through the setting of branch liquid channel and vertical channel, when the auxiliary rod is inserted into the sealing hole, the auxiliary rod is sealed to the sealing hole, makes the oil liquid of cylinder one end only enter into the cylinder bottom from branch liquid channel, thereby slows down the rate of oil liquid in cylinder one end to enter into the cylinder bottom, realizes the buffering to piston head, rotates the buffer valve, realizes the control flow path between branch liquid channel and horizontal channel intercommunication, realizes the adjustment buffering degree to piston head.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically a buffer-type self-sealing adjustable hydraulic cylinder. Background Technology

[0002] Hydraulic cylinders, as the core actuators of hydraulic transmission systems, are widely used in many industrial fields, such as engineering machinery, due to their significant advantages such as simple structure, large output force, smooth movement, and ease of achieving reciprocating linear motion. When the piston reaches the end of its stroke, if no effective buffering measures are taken, the piston (or piston rod) will impact the cylinder head (or cylinder bottom) at a high speed. This rigid impact will generate huge instantaneous impact force (water hammer effect) and severe vibration, which can easily damage the cylinder's own structure (such as cylinder head, piston, piston rod threads, connecting parts), shorten the life of the cylinder and related equipment, and affect the system's positioning accuracy and stability. It may even damage the connected load mechanism. To address this issue, a buffered, self-sealing, adjustable hydraulic cylinder is proposed. Utility Model Content

[0003] The purpose of this invention is to provide a buffer-type self-sealing adjustable hydraulic cylinder to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A buffer-type self-sealing adjustable hydraulic cylinder includes:

[0006] The cylinder has a piston rod installed inside;

[0007] A piston head is installed at one end of a piston rod, a secondary rod is fixedly installed at one end of the piston head, and a main rod is fixedly installed at the other end of the piston head;

[0008] A cylinder bottom is fixedly installed at one end of a cylinder barrel, and a cylinder head is fixedly installed at the other end of the cylinder barrel. A vertical channel is opened inside the cylinder bottom, and a liquid inlet is opened on one side of the outer wall of the cylinder bottom, which is connected to the vertical channel. A branch channel is opened on one side of the cylinder bottom, and a transverse channel is connected between the branch channel and the vertical channel. A valve hole is opened on the other side of the outer wall of the cylinder bottom, and a buffer valve is installed in the valve hole. The buffer valve is used to control the flow path between the branch channel and the transverse channel. The cylinder head has the same structure as the cylinder bottom, and the piston rod is slidably inserted into the cylinder head.

[0009] Furthermore, a sealing hole is provided at one end of the vertical channel, and the auxiliary rod is used to slide and insert into the sealing hole. The outer diameter of the auxiliary rod is the same as the inner diameter of the sealing hole.

[0010] Furthermore, the cylinder head is fixedly mounted with a mounting base by bolts, and a guide cylinder is installed between the mounting base and the cylinder head, with the guide cylinder and the piston rod being slidably sleeved together.

[0011] Furthermore, a ring seat is installed at one end of the guide cylinder, and a sealing ring is installed on one side of the ring seat, the sealing ring being used for compression sealing with the cylinder head.

[0012] Furthermore, the piston head has sealing elements fitted onto both ends of its outer side wall, a guide ring installed in the middle of the piston head, and an inner groove formed on one side of the guide ring.

[0013] Furthermore, a buffer spring is fixedly installed at one end of the cylinder bottom.

[0014] Furthermore, a support cylinder is fixedly installed at one end of the cylinder bottom, and a support cylinder is fixedly installed at one end of the piston head. The support cylinder is used to support the inner side of the buffer spring.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. By setting up branch channels and vertical channels, when the piston head and piston rod retract, after the auxiliary rod is inserted into the sealing hole, the auxiliary rod blocks the sealing hole, so that the oil at one end of the cylinder can only enter the bottom of the cylinder through the branch channel, thereby slowing down the rate at which the oil at one end of the cylinder enters the bottom of the cylinder, thus buffering the piston head. Rotating the buffer valve controls the flow path between the branch channel and the horizontal channel, thereby controlling the rate at which the oil flows through the branch channel and adjusting the degree of buffering on the piston head.

[0017] 2. By setting up a buffer spring, when the piston head retracts, the piston head first contacts the buffer spring, and the buffer spring buffers the piston head. Then the auxiliary rod is inserted into the sealing hole. By setting up a buffer spring, the piston head is buffered and decelerated in advance before the auxiliary rod is inserted into the sealing hole, so that the piston head is buffered and decelerated more smoothly, reducing the instantaneous pressure peak. By setting up support cylinder one and support cylinder two, the buffer spring is prevented from being bent during compression. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall front view of the present invention;

[0020] Figure 3 This is a schematic diagram of the internal structure of the cylinder in this utility model;

[0021] Figure 4 This is a schematic diagram of the cylinder bottom structure in this utility model;

[0022] Figure 5 This is a schematic diagram of the piston head structure in this utility model;

[0023] Figure 6 This is a schematic diagram of the cylinder head structure in this utility model.

[0024] In the diagram: 100, cylinder barrel; 200, cylinder bottom; 210, liquid inlet; 220, vertical channel; 221, sealing hole; 222, horizontal channel; 230, branch channel; 240, buffer valve; 250, valve hole; 260, buffer spring; 270, support cylinder one; 300, cylinder head; 400, piston head; 410, seal; 411, inner groove; 420, guide ring; 430, support cylinder two; 440, auxiliary rod; 450, main rod; 500, piston rod; 600, mounting base; 700, guide cylinder; 710, ring seat; 711, sealing ring. Detailed Implementation

[0025] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-5 In this embodiment of the present invention, a buffer-type self-sealing adjustable hydraulic cylinder includes a cylinder barrel 100, a cylinder bottom 200, and a piston head 400. A piston rod 500 is disposed inside the cylinder barrel 100. The piston head 400 is installed at one end of the piston rod 500. A secondary rod 440 is fixedly installed at one end of the piston head 400, and a main rod 450 is fixedly installed at the other end of the piston head 400. The cylinder bottom 200 is fixedly installed at one end of the cylinder barrel 100, and a cylinder head 300 is fixedly installed at the other end of the cylinder barrel 100. A vertical channel 220 is provided inside the cylinder bottom 200, and a liquid inlet 210 is provided on one side of the outer wall of the cylinder bottom 200. The liquid inlet 210 is connected to the vertical channel 220. The cylinder bottom 200 is connected to the channel 220. A branch channel 230 is provided on one side of the cylinder bottom 200. A transverse channel 222 is connected between the branch channel 230 and the vertical channel 220. A valve hole 250 is provided on the other side of the outer wall of the cylinder bottom 200. A buffer valve 240 is installed in the valve hole 250. The buffer valve 240 is used to control the flow path between the branch channel 230 and the transverse channel 222. The cylinder head 300 has the same structure as the cylinder bottom 200. The piston rod 500 is slidably inserted into the cylinder head 300. A threaded groove is provided on the outer wall of the buffer valve 240. The buffer valve 240 is screwed into the valve hole 250. A hexagonal groove is provided at one end of the buffer valve 240.

[0027] A sealing hole 221 is provided at one end of the vertical channel 220. The auxiliary rod 440 is used to slide and insert into the sealing hole 221. The outer diameter of the auxiliary rod 440 is the same as the inner diameter of the sealing hole 221. The cylinder head 300 is fixedly installed with a mounting seat 600 by bolts. A guide cylinder 700 is installed between the mounting seat 600 and the cylinder head 300. The guide cylinder 700 is slidably sleeved with the piston rod 500. A ring seat 710 is installed at one end of the guide cylinder 700. A sealing ring 711 is installed on one side of the ring seat 710. The sealing ring 711 is used to squeeze and seal with the cylinder head 300.

[0028] Specifically, when the piston rod 500 extends, oil enters through the inlet 210 on the cylinder bottom 200. The oil then enters one end of the cylinder barrel 100 through vertical channels 220 and 239, thereby pushing the piston head 400 and piston rod 500 outward. When the piston head 400 and piston rod 500 retract, the oil at one end of the cylinder barrel 100 enters the cylinder bottom 200 through the vertical channel 220 and branch channel 230, and flows out through the inlet 210. When the auxiliary rod 440 is inserted into the sealing hole 221, the auxiliary rod 440 seals the sealing hole 221, so that the oil at one end of the cylinder barrel 100 only... The fluid can enter the cylinder bottom 200 from the branch channel 230, thereby slowing down the rate at which the oil from one end of the cylinder barrel 100 enters the cylinder bottom 200, thus buffering the piston head 400. By rotating the buffer valve 240, the flow path between the branch channel 230 and the transverse channel 222 can be controlled, thereby controlling the rate at which the oil flows through the branch channel 230 and adjusting the degree of buffering on the piston head 400. Similarly, by setting the cylinder head 300 and the cylinder bottom 200 to have the same structure, when the piston head 400 extends outward and approaches the cylinder head 300, the cylinder head 300 buffers the piston head 400.

[0029] Example 1

[0030] like Figures 3-6 As shown, in this embodiment, seals 410 are fitted onto both ends of the outer side wall of the piston head 400. A guide ring 420 is installed in the middle of the piston head 400. An inner groove 411 is provided on one side of the guide ring 420. A buffer spring 260 is fixedly installed at one end of the cylinder bottom 200. A support cylinder 270 is fixedly installed at one end of the cylinder bottom 200. A support cylinder 430 is fixedly installed at one end of the piston head 400. The support cylinder 270 is used to support the inner side of the buffer spring 260.

[0031] In this embodiment, by setting the inner groove 411, the inner groove 411 is pressed against the inner wall of the cylinder 100 by hydraulic pressure, thereby improving the sealing performance of the seal 410 and reducing oil leakage at both ends of the piston head 400. By setting the support cylinder 270, when the piston head 400 retracts, the piston head 400 first contacts the buffer spring 260, and the buffer spring 260 buffers the piston head 400. Then, the auxiliary rod 440 is inserted into the sealing hole 221. Before and after the rod 440 is inserted into the sealing hole 221, the short-term return speed of the piston head 400 changes significantly, resulting in a high instantaneous pressure at one end of the cylinder 100. By setting the buffer spring 260, the piston head 400 is buffered and decelerated in advance before the auxiliary rod 440 is inserted into the sealing hole 221, so that the piston head 400 is buffered and decelerated more smoothly, reducing the instantaneous pressure peak. By setting the support cylinder 1 270 and support cylinder 2 430, the buffer spring 260 is prevented from being bent during compression.

[0032] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A buffer-type self-sealing adjustable hydraulic cylinder, characterized in that, include: A cylinder (100) has a piston rod (500) installed inside it; A piston head (400) is installed at one end of a piston rod (500). A secondary rod (440) is fixedly installed at one end of the piston head (400), and a main rod (450) is fixedly installed at the other end of the piston head (400). A cylinder bottom (200) is fixedly installed at one end of a cylinder barrel (100), and a cylinder head (300) is fixedly installed at the other end of the cylinder barrel (100). A vertical channel (220) is provided inside the cylinder bottom (200), and a liquid inlet (210) is provided on one side of the outer wall of the cylinder bottom (200), which communicates with the vertical channel (220). A branch channel (230) is provided on one side of the cylinder bottom (200), which communicates with the vertical channel (220). A transverse channel (222) is connected between the channels (220). A valve hole (250) is provided on the other side of the outer wall of the cylinder bottom (200). A buffer valve (240) is installed in the valve hole (250). The buffer valve (240) is used to control the flow path between the branch channel (230) and the transverse channel (222). The cylinder head (300) has the same structure as the cylinder bottom (200). The piston rod (500) is slidably inserted into the cylinder head (300).

2. The buffer-type self-sealing adjustable hydraulic cylinder according to claim 1, characterized in that, One end of the vertical channel (220) is provided with a sealing hole (221), and the auxiliary rod (440) is used to slide and insert with the sealing hole (221). The outer diameter of the auxiliary rod (440) is the same as the inner diameter of the sealing hole (221).

3. The buffer-type self-sealing adjustable hydraulic cylinder according to claim 1, characterized in that, The cylinder head (300) is fixedly mounted with a mounting base (600) by bolts. A guide cylinder (700) is installed between the mounting base (600) and the cylinder head (300). The guide cylinder (700) is slidably sleeved with the piston rod (500).

4. A buffer-type self-sealing adjustable hydraulic cylinder according to claim 3, characterized in that, One end of the guide cylinder (700) is equipped with a ring seat (710), and a sealing ring (711) is installed on one side of the ring seat (710). The sealing ring (711) is used to press and seal with the cylinder head (300).

5. A buffer-type self-sealing adjustable hydraulic cylinder according to claim 1, characterized in that, The piston head (400) has sealing elements (410) fitted onto both ends of its outer side wall. A guide ring (420) is installed in the middle of the piston head (400), and an inner groove (411) is provided on one side of the guide ring (420).

6. A buffer-type self-sealing adjustable hydraulic cylinder according to claim 1, characterized in that, A buffer spring (260) is fixedly installed at one end of the cylinder bottom (200).

7. A buffer-type self-sealing adjustable hydraulic cylinder according to claim 6, characterized in that, A support cylinder one (270) is fixedly installed at one end of the cylinder bottom (200), and a support cylinder two (430) is fixedly installed at one end of the piston head (400). The support cylinder one (270) is used to support the inner side of the buffer spring (260).

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