Wear-resistant two-stage telescopic hydraulic cylinder

Abstract

The utility model relates to hydraulic mechanical technical field especially relates to a wear -resisting two -stage telescopic hydraulic oil cylinder. Including base, install two -stage jacking cylinder on base, still include the movable plate of sliding installation in two -stage jacking cylinder inside, and the fixed first stage piston post is on movable plate, and the slide groove is seted up on first stage piston post, and the sliding block is connected with in slide groove, and the fixed second stage piston rod is on sliding block, and automatic component, the utility model discloses through the automatic component of design, when the oil pressure acts on the plugging cap when the second stage piston rod needs to be telescopic, make the plugging cap receive pressure action, and then drive transmission rod and link plate to move and compress spring, unlike traditional two -stage hydraulic oil cylinder, ensure in telescopic process, whether oil liquid flow or pressure change, can be automatic component effective response, realize the automatic flexible telescoping of second stage piston rod truly, greatly promoted the automatic operation effect of hydraulic oil cylinder.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic machinery technology, and in particular to a wear-resistant double-stage telescopic hydraulic cylinder. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, has no transmission backlash, and provides smooth movement. Therefore, it is widely used in the hydraulic systems of various machines. A two-stage hydraulic cylinder is a hydraulic cylinder with two piston rods. In traditional two-stage hydraulic cylinders, hydraulic oil first pushes the first-stage piston rod outward during operation. When the first-stage piston rod extends to its maximum height, the bottom valve at the bottom of the first-stage piston rod needs to be opened by operation to allow liquid oil to enter the second-stage cylinder to drive the extension and retraction of the second-stage piston rod. However, existing two-stage hydraulic cylinders cannot achieve automatic extension and retraction of the second-stage piston rod because the opening of the bottom valve requires additional operation. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a wear-resistant double-stage telescopic hydraulic cylinder.

[0004] This utility model provides a wear-resistant double-stage telescopic hydraulic cylinder, including a base on which a secondary lifting cylinder is mounted; a movable plate slidably installed inside the secondary lifting cylinder, a primary piston rod fixed on the movable plate, a groove on the primary piston rod, a slider slidably connected in the groove, a secondary piston rod fixed on the slider, and the secondary piston rod flexibly extending and retracting relative to the primary piston rod through the sliding cooperation between the slider and the groove; and an automatic component installed inside the movable plate, which realizes the automatic extension and retraction of the secondary piston rod; the automatic component includes an oil drain groove inside the movable plate, a sealing cover installed in the oil drain groove, a transmission rod installed on the sealing cover, and the transmission rod slidably connected to the movable plate.

[0005] Preferably, a linkage plate is fixed to the top of the transmission rod, and a spring is fixed to the movable plate. One end of the spring is fixed to the movable plate, and the other end is fixedly connected to the linkage plate. This facilitates the elastic reset of the transmission rod through the spring force, and makes the linkage structure run stably.

[0006] Preferably, an oil supply pipe is connected to the oil drain trough, and a delivery seat is connected to the oil supply pipe. The delivery seat is located inside the first-stage piston column, which is conducive to the directional delivery of oil and facilitates the formation of a closed oil circuit circulation.

[0007] Preferably, an oil guide block is installed on the conveyor seat, and the end of the oil guide block away from the conveyor seat is connected to the slide groove, which is conducive to the precise introduction of oil into the slide groove and facilitates the lubrication of the slider.

[0008] Preferably, the secondary lifting cylinder is equipped with an oil inlet pipe, with one end of the oil inlet pipe located inside the secondary lifting cylinder and the other end located outside the secondary lifting cylinder. An oil injection head is installed at one end of the oil inlet pipe, which is conducive to the stable access of external oil sources and facilitates efficient replenishment of hydraulic oil.

[0009] Preferably, both the secondary lifting cylinder and the primary piston column have magnetic grooves inside, and limit blocks are installed inside. The magnetic grooves are equipped with magnetic blocks, which is beneficial for using magnetic force to assist positioning and improves the stability of component extension and retraction.

[0010] Preferably, a disc is installed on the top of the secondary piston rod, and a reinforcing sleeve is fitted on the outside of the secondary lifting cylinder, which helps to enhance the end bearing capacity and cylinder strength, and facilitates the extension of the equipment's service life.

[0011] Compared with related technologies, the wear-resistant double-stage telescopic hydraulic cylinder provided by this utility model has the following beneficial effects: 1. This utility model, through its designed automatic components, ensures that when the secondary piston rod needs to extend or retract, the pressure of the oil acting on the sealing cover causes the sealing cover to be subjected to pressure, which in turn drives the transmission rod and linkage plate to move and compress the spring. Unlike traditional double-stage hydraulic cylinders, this design ensures that during the extension and retraction process, both oil flow and pressure changes can be effectively responded to by the automatic components, truly realizing the automatic and flexible extension and retraction of the secondary piston rod, and greatly improving the automated operation effect of the hydraulic cylinder.

[0012] This invention utilizes a spring and linkage plate combination structure. When the transmission rod moves, the linkage plate is subjected to external force, causing the spring to be stretched or compressed, which in turn drives the transmission rod to quickly return to its original position. Unlike traditional two-stage hydraulic cylinders, this design ensures that during reciprocating motion, whether the pressure in the power chamber changes or the external force is released, the spring can provide timely feedback, truly achieving automatic return of the transmission structure and greatly improving the response sensitivity of the hydraulic cylinder. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the overall front structure of this utility model; Figure 3 This is a schematic diagram of the overall internal structure of this utility model; Figure 4 This is a schematic diagram of the magnetic groove structure of this utility model; Figure 5 for Figure 3 The corresponding enlarged schematic diagram is shown in the image.

[0014] The following components are labeled in the diagram: 1. Base; 2. Secondary lifting cylinder; 3. Movable plate; 4. Primary piston rod; 5. Slide groove; 6. Sliding block; 7. Secondary piston rod; 8. Automatic component; 9. Oil drain groove; 10. Sealing cover; 11. Transmission rod; 12. Linkage plate; 13. Spring; 14. Oil supply pipe; 15. Conveying seat; 16. Oil guide block; 17. Oil inlet pipe; 18. Oil injection head; 19. Magnetic groove; 20. Magnetic block; 21. Disc; 22. Reinforcing sleeve. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0016] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0017] Please see Figure 1 - Figure 5 A wear-resistant, two-stage telescopic hydraulic cylinder includes a base 1, on which a secondary lifting cylinder 2 is mounted; it also includes a movable plate 3 slidably installed inside the secondary lifting cylinder 2, on which a primary piston rod 4 is fixed, a groove 5 is formed on the primary piston rod 4, a slider 6 is slidably connected within the groove 5, and a secondary piston rod 7 is fixed on the slider 6. Through the sliding cooperation between the slider 6 and the groove 5, the secondary piston rod 7 can flexibly extend and retract relative to the primary piston rod 4; and an automatic component 8 installed inside the movable plate 3, through which the automatic extension and retraction of the secondary piston rod 7 is achieved. Among them, the automatic component 8 includes an oil drain trough 9, which is opened inside the movable plate 3. A sealing cover 10 is installed inside the oil drain trough 9, and a transmission rod 11 is installed on the sealing cover 10. The transmission rod 11 is slidably connected to the movable plate 3. Please see Figure 3 and Figure 5 Through the designed automatic component 8, when the secondary piston rod 7 needs to extend or retract, the oil pressure acts on the sealing cover 10, causing the sealing cover 10 to be subjected to pressure, which in turn drives the transmission rod 11 and the linkage plate 12 to move and compress the spring 13. Unlike the traditional double-stage hydraulic cylinder, this ensures that during the extension and retraction process, whether it is oil flow or pressure change, it can be effectively responded to by the automatic component 8, truly realizing the automatic and flexible extension and retraction of the secondary piston rod 7, and greatly improving the automated operation effect of the hydraulic cylinder. In addition, a linkage plate 12 is fixed to the top of the transmission rod 11, and a spring 13 is fixed on the movable plate 3. One end of the spring 13 is fixed to the movable plate 3, and the other end is fixedly connected to the linkage plate 12. This facilitates the elastic reset of the transmission rod 11 through the elastic force of the spring 13, which makes the linkage structure run stably. Meanwhile, an oil supply pipe 14 is connected to the oil drain 9, and a delivery seat 15 is connected to the oil supply pipe 14. The delivery seat 15 is located inside the first-stage piston column 4, which is conducive to the directional delivery of oil and facilitates the formation of a closed oil circuit circulation. In this technical solution, such as Figure 1 - Figure 5 As shown, an oil guide block 16 is installed on the conveyor seat 15. The end of the oil guide block 16 away from the conveyor seat 15 is connected to the slide groove 5, which is conducive to the precise introduction of oil into the slide groove 5 and provides lubrication for the sliding of the slider 6. An oil inlet pipe 17 is installed inside the secondary lifting cylinder 2. One end of the oil inlet pipe 17 is located inside the secondary lifting cylinder 2, and the other end is located outside the secondary lifting cylinder 2. An oil injection head 18 is installed at one end of the oil inlet pipe 17, which is conducive to the stable access of external oil source and facilitates efficient replenishment of hydraulic oil.

[0018] The secondary lifting cylinder 2 and the primary piston column 4 are both provided with magnetic grooves 19 and limit blocks are installed inside them. Magnetic blocks 20 are installed in the magnetic grooves 19, which is conducive to using magnetic force to assist positioning and improves the stability of component extension and retraction.

[0019] In addition, a disc 21 is installed on the top of the secondary piston rod 7, and a reinforcing sleeve 22 is fitted on the outside of the secondary lifting cylinder 2, which helps to enhance the end bearing capacity and cylinder strength, and facilitates the extension of the equipment's service life. The working principle of automatic component 8 is explained below: First, hydraulic oil enters the inlet pipe 17 through the oil injection head 18 and is then transported to the interior of the secondary lifting cylinder 2. The base 1 provides stable support for the entire cylinder. Under the pressure of the hydraulic oil, the movable plate 3 inside the secondary lifting cylinder 2 moves upward under force. The movable plate 3 drives the primary piston column 4 to rise synchronously. At this time, the secondary piston rod 7 extends initially along with the primary piston column 4, and the slider 6 slides synchronously in the slide groove 5 to ensure the stability of the extension and retraction trajectory. The magnetic block 20 in the magnetic groove 19 generates magnetic force to assist in improving the relative motion stability of the primary piston column 4 and the secondary lifting cylinder 2. The limiting blocks inside the secondary lifting cylinder 2 and the primary piston column 4 are now in close contact with the bottom of the linkage plate 12 to prepare for subsequent actions. At the same time, the limiting slider 6 ensures the accuracy of the sliding trajectory. Secondly, when the secondary piston rod 7 needs to extend or retract further, the automatic component 8 starts working: the oil pressure acts on the sealing cover 10 in the oil drain groove 9, pushing the sealing cover 10 to move. Since the bottom of the linkage plate 12 and the limit block are tightly attached, under the action of the liquid oil, the linkage plate 12 and the transmission rod 11 move downward, thereby pushing the two sealing covers 10 to move downward, and the spring 13 is compressed. At the same time, the oil in the oil drain groove 9 flows into the conveying seat 15 through the oil supply pipe 14, and then is accurately guided into the slide groove 5 through the oil guide block 16, providing lubrication for the relative sliding of the slider 6 and the slide groove 5, so that the secondary piston rod 7 can extend and retract flexibly under hydraulic drive. The reinforcing sleeve 22 outside the secondary lifting cylinder 2 enhances the cylinder strength to ensure stable pressure bearing. The limit block continuously limits the extension and retraction range of the components to prevent overtravel. The limit slider 6 ensures that the movement of each component is accurate and does not deviate. Then, when the oil pressure decreases, the spring 13 releases its elastic force, causing the linkage plate 12, transmission rod 11 and sealing cover 10 to reset. The sealing cover 10 re-closes the oil drain groove 9, stopping the oil from being delivered to the slide groove 5. At this time, the magnetic force of the magnetic block 20 continues to act, assisting the first-stage piston rod 4 and the second-stage lifting cylinder 2 to maintain relative positioning. The slider 6 remains stable in the slide groove 5. The extension and retraction of the second-stage piston rod 7 is precise and controllable. The disc 21 disperses the force on the top of the second-stage piston rod 7 by increasing the contact area. The limiting block prevents the components from colliding during the reset process. The limiting slider 6 maintains the accurate reset trajectory of the components. Finally, when the cylinder needs to retract, the hydraulic oil flows back in the reverse direction through the inlet pipe 17. Under the action of reverse pressure, the movable plate 3 drives the first-stage piston rod 4 to move into the second-stage lifting cylinder 2. The slider 6 slides down synchronously along the slide groove 5, and the second-stage piston rod 7 retracts accordingly. During this process, the reinforcing sleeve 22 continuously protects the second-stage lifting cylinder 2 from excessive compression, the disc 21 avoids force concentration at the end, the magnetic block 20 assists in positioning to ensure accurate retraction trajectory, the limit block prevents excessive retraction of components from causing structural damage, and the limit slider 6 ensures that the movement of each component is precise and orderly during the retraction process until each component returns to its initial state, completing the entire working cycle.

[0020] The circuits and controls involved in this utility model are all existing technologies, and will not be described in detail here.

[0021] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A wear-resistant double-stage telescopic hydraulic cylinder, comprising a base (1), wherein a two-stage lifting cylinder (2) is mounted on the base (1); Its features are, Also includes: A movable plate (3) is slidably installed inside the secondary lifting cylinder (2). A primary piston rod (4) is fixed on the movable plate (3). A groove (5) is provided on the primary piston rod (4). A slider (6) is slidably connected in the groove (5). A secondary piston rod (7) is fixed on the slider (6). Through the sliding cooperation between the slider (6) and the groove (5), the secondary piston rod (7) can flexibly extend and retract relative to the primary piston rod (4); and, An automatic component (8) installed inside the movable plate (3) enables the automatic extension and retraction of the secondary piston rod (7). The automatic component (8) includes an oil drain groove (9) which is located inside the movable plate (3). A sealing cover (10) is installed inside the oil drain groove (9). A transmission rod (11) is installed on the sealing cover (10). The transmission rod (11) is slidably connected to the movable plate (3).

2. The wear-resistant double-stage telescopic hydraulic cylinder according to claim 1, characterized in that: A linkage plate (12) is fixed to the top of the transmission rod (11), and a spring (13) is fixed on the movable plate (3). One end of the spring (13) is fixed on the movable plate (3), and the other end is fixedly connected to the linkage plate (12).

3. The wear-resistant double-stage telescopic hydraulic cylinder according to claim 2, characterized in that: The oil drain groove (9) is connected to an oil supply pipe (14), and the oil supply pipe (14) is connected to a delivery seat (15), which is located inside the first-stage piston column (4).

4. The wear-resistant double-stage telescopic hydraulic cylinder according to claim 3, characterized in that: An oil guide block (16) is installed on the conveyor seat (15), and one end of the oil guide block (16) away from the conveyor seat (15) is connected to the chute (5).

5. A wear-resistant double-stage telescopic hydraulic cylinder according to claim 1, characterized in that: The secondary lifting cylinder (2) is equipped with an oil inlet pipe (17). One end of the oil inlet pipe (17) is located inside the secondary lifting cylinder (2), and the other end is located outside the secondary lifting cylinder (2). An oil injection head (18) is installed at one end of the oil inlet pipe (17).

6. A wear-resistant double-stage telescopic hydraulic cylinder according to claim 5, characterized in that: The interior of the secondary lifting cylinder (2) and the primary piston column (4) are both provided with magnetic grooves (19) and limit blocks are installed inside them. Magnetic blocks (20) are installed in the magnetic grooves (19).

7. A wear-resistant double-stage telescopic hydraulic cylinder according to claim 1, characterized in that: The top of the secondary piston rod (7) is fitted with a disc (21), and the secondary lifting cylinder (2) is fitted with a reinforcing sleeve (22).

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