An adjustable hydraulic cylinder

Abstract

This utility model discloses an adjustable hydraulic cylinder, relating to the field of hydraulic cylinder technology. It includes a mounting base, with multiple-stage cylinders fixedly connected inside. The mounting base also has a buffer mechanism, comprising a buffer assembly and a mounting assembly that cooperate with each other. Each buffer assembly includes sliding columns symmetrically fixedly connected inside the mounting base. Buffer springs are fitted around the outer sides of both sliding columns, and lifting blocks are fitted around the outer sides of both sliding columns and above the buffer springs. Stabilizing rods are symmetrically slidably connected to both sides of the top of the mounting base. This adjustable hydraulic cylinder, through its buffer mechanism, provides multi-stage buffering during cylinder retraction, preventing internal wear due to rigid impacts during prolonged use, effectively protecting the seal, extending service life, and exhibiting a simple structure and strong practicality.

Description

Technical Field

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

[0002] Adjustable hydraulic cylinders are hydraulic actuators composed of multiple nested cylinders and pistons. They achieve a stroke far exceeding that of a single-stage cylinder by extending or retracting in stages. Their working principle is that pressurized oil pushes the nested pistons in stages, extending them from large to small, providing a multiplied displacement within a limited installation space. They combine a compact structure with long stroke characteristics and are widely used in fields such as engineering machinery and lifting equipment that require a wide range of linear motion.

[0003] A search revealed an adjustable hydraulic cylinder (authorization announcement number: CN 221236979 U), which "comprising: a mounting plate, on which a fixed plate is fixedly mounted, and a hydraulic cylinder body is mounted on the fixed plate; the hydraulic cylinder body includes a cylinder body and a piston rod that moves through the cylinder body; the cylinder body is fixedly connected to the fixed plate; an oil inlet pipe and an oil outlet pipe are installed at one end of the hydraulic cylinder body near the fixed plate, both of which penetrate the fixed plate and extend to the outside of the fixed plate; and multiple guide components, all mounted on the mounting plate. This invention utilizes an adjusting mechanism and multiple guide components. The limiting plate and the mounting plate are connected through multiple guide components, increasing the stability of the connection between the limiting plate and the mounting plate. When adjusting the position of the limiting plate, a single adjusting mechanism can be used to make the limiting plate slide or stop sliding along the guide components, thus adjusting the position of the limiting plate without requiring multiple operators to coordinate the adjustment, making the operation simple."

[0004] Based on the aforementioned technologies, the applicant believes that although the multi-stage hydraulic cylinders in the above technologies can be quickly installed and positioned, in actual use, the cylinder extension end lacks an effective buffer mechanism when retracting. Long-term use is prone to wear inside the cylinder due to rigid impact, reducing sealing performance and service life. In response to the above problems, we have introduced an adjustable hydraulic cylinder. Utility Model Content

[0005] This utility model discloses an adjustable hydraulic cylinder, which aims to solve the technical problem that the cylinder's telescopic end lacks an effective buffer mechanism when retracting, and that long-term use is prone to internal wear due to rigid impact, reducing sealing performance and service life.

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

[0007] An adjustable hydraulic cylinder includes a mounting base. A multi-stage hydraulic cylinder is fixedly connected inside the mounting base. The mounting base also includes a buffer mechanism comprising a buffer assembly and a mounting assembly, which cooperate with each other. Each buffer assembly includes sliding columns symmetrically fixedly connected inside the mounting base. Buffer springs are fitted around the outer sides of both sliding columns, and lifting blocks are fitted around the outer sides of both sliding columns and above the buffer springs. Stabilizing rods are symmetrically slidably connected to both sides of the top of the mounting base. The bottom of the stabilizing rods is fixedly connected to the top of the lifting blocks. A connecting plate is provided on the outer side of the telescopic end of the multi-stage hydraulic cylinder. The bottom of the connecting plate is fixedly connected to the top of the stabilizing rods. An clearance hole is provided inside the connecting plate. A pressing plate is fixedly connected to the outer side of the telescopic end of the multi-stage hydraulic cylinder. The size of the pressing plate is larger than the size of the clearance hole, and the pressing plate and the clearance hole cooperate with each other.

[0008] The buffer mechanism can provide multi-stage buffering when the cylinder retracts, avoiding wear inside the cylinder caused by rigid impact during long-term use. It effectively protects the seal and extends the service life. The structure is simple and highly practical.

[0009] In a preferred embodiment, the mounting assembly includes a stabilizer base fixedly connected to the bottom of the mounting base. The stabilizer base is cross-shaped, and its interior has a rectangular array of mounting holes that cooperate with external mounting bolts.

[0010] The mounting components employ a cross-shaped stabilizer and a rectangular array of mounting holes to improve overall installation stability, prevent displacement of the hydraulic cylinder during operation, and facilitate quick fixing with bolts, adapting to different installation environments.

[0011] In a preferred embodiment, a connector is installed at the top of the telescopic end of the multi-stage hydraulic cylinder, and the connector has symmetrically arranged connecting holes inside.

[0012] The top of the telescopic end is equipped with a connector and symmetrical connection holes, which facilitates rigid connection with other mechanical components, ensures uniform force transmission, and avoids deformation or loosening caused by single-point force.

[0013] In a preferred embodiment, a rubber ring is fixedly connected to the top of the clearance hole, and the rubber ring and the pressing plate are used in conjunction with each other.

[0014] A rubber ring is added to the top of the clearance hole, which works with the pressing plate to form a soft contact buffer, further absorbing impact energy, reducing noise, and protecting the internal structure of the cylinder.

[0015] In a preferred embodiment, a silicone pad is fixedly connected to the bottom of the stabilizer, and the silicone pad is also cross-shaped.

[0016] The bottom of the stabilizer is equipped with a cross-shaped silicone pad to enhance the shock absorption effect during installation, prevent vibration from being transmitted to the support structure, and provide anti-slip function to improve safety.

[0017] In a preferred embodiment, the mounting base has heat dissipation grooves equidistantly spaced on both sides of its interior for cooling the multi-stage hydraulic cylinders.

[0018] The mounting base has equidistant heat dissipation grooves inside to promote heat dissipation during the operation of the multi-stage hydraulic cylinder, prevent hydraulic oil from overheating and failing, and maintain the long-term stable operation of the hydraulic cylinder.

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

[0020] Firstly, the buffer mechanism can provide multi-stage buffering when the cylinder retracts, preventing wear inside the cylinder due to rigid impact during prolonged use. This effectively protects the seal, extends service life, and has a simple structure with strong practicality.

[0021] Secondly, the top of the telescopic end is equipped with a connector and symmetrical connecting holes, facilitating rigid connection with other mechanical components, ensuring uniform force transmission, and preventing deformation or loosening caused by single-point force. A rubber ring is added to the top of the clearance hole, forming a soft contact buffer with the pressing plate to further absorb impact energy, reduce noise, and protect the internal structure of the cylinder. A cross-shaped silicone pad is installed at the bottom of the stabilizing seat to enhance vibration damping during installation, prevent vibration from being transmitted to the supporting structure, and provide anti-slip function, improving safety. Equidistant heat dissipation grooves are opened inside the mounting seat to promote heat dissipation during the operation of the multi-stage cylinder, preventing hydraulic oil overheating and failure, and maintaining long-term stable operation of the cylinder. Attached Figure Description

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

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

[0024] Figure 3 This is a three-dimensional cross-sectional schematic diagram of an adjustable hydraulic cylinder proposed in this utility model.

[0025] Figure 4 This is a front cross-sectional view of an adjustable hydraulic cylinder proposed in this utility model.

[0026] In the attached diagram: 1. Mounting base; 2. Multi-stage hydraulic cylinder; 3. Slide column; 4. Buffer spring; 5. Lifting block; 6. Stabilizer bar; 7. Connecting plate; 8. Clearance hole; 9. Rubber ring; 10. Pressing plate; 11. Connector; 12. Connecting hole; 13. Stabilizer seat; 14. Mounting hole; 15. Silicone pad; 16. Heat dissipation groove. Detailed Implementation

[0027] 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.

[0028] The adjustable hydraulic cylinder disclosed in this utility model is mainly used in hydraulic cylinder application scenarios.

[0029] Reference Figures 1-4 An adjustable hydraulic cylinder includes a mounting base 1. A multi-stage hydraulic cylinder 2 is fixedly connected inside the mounting base 1. The mounting base 1 has a buffer mechanism inside, comprising a buffer assembly and a mounting assembly. The buffer assembly and mounting assembly cooperate with each other. The buffer assembly includes sliding columns 3, which are symmetrically fixedly connected inside the mounting base 1. Buffer springs 4 are fitted on the outer sides of both sliding columns 3. Lifting blocks 5 are fitted on the outer sides of both sliding columns 3 and above the buffer springs 4. Stabilizing rods 6 are symmetrically slidably connected to both sides of the top of the mounting base 1. The bottom of the stabilizing rods 6 is fixedly connected to the top of the lifting blocks 5. A connecting plate 7 is provided on the outer side of the telescopic end of the multi-stage hydraulic cylinder 2. The bottom of the connecting plate 7 is fixedly connected to the top of the stabilizing rods 6. An clearance hole 8 is provided inside the connecting plate 7. A pressing plate 10 is fixedly connected to the outer side of the telescopic end of the multi-stage hydraulic cylinder 2. The size of the pressing plate 10 is larger than the size of the clearance hole 8. The pressing plate 10 and the clearance hole 8 cooperate with each other. The mounting assembly includes a stabilizer 13, which is fixedly connected to the bottom of the mounting base 1. The stabilizer 13 is cross-shaped, and the interior of the stabilizer 13 has a rectangular array of mounting holes 14, which are used in conjunction with external mounting bolts.

[0030] In this embodiment: when the telescopic end retracts, the pressing plate 10 first contacts the rubber ring 9 at the edge of the clearance hole 8 to form an initial buffer. As the retraction stroke continues, the pressing plate 10 pushes the connecting plate 7 down, causing the stabilizer 6 and the lifting block 5 to slide down along the slide column 3. At this time, the buffer spring 4 is compressed to generate a reverse force, converting mechanical energy into elastic potential energy and effectively absorbing impact energy. During this process, the flexible contact between the rubber ring 9 and the pressing plate 10 further attenuates vibration and reduces noise. The cross-shaped stabilizer 13 is rigidly connected to the external structure through the mounting hole 14, and works with the silicone pad 15 at the bottom to achieve secondary shock absorption, ensuring overall stability. Through the buffer mechanism, multi-stage buffering can be performed when the cylinder telescopic end retracts, avoiding wear inside the cylinder due to rigid impact during long-term use, effectively protecting the sealing performance and extending the service life. The structure is simple and highly practical.

[0031] In the above technical solution, considering the lack of an effective buffer mechanism when the cylinder retracts, long-term use is prone to internal wear due to rigid impact, reducing sealing performance and service life. To solve this problem, the specific operation is as follows:

[0032] Reference Figures 1-4 In a preferred embodiment, a connector 11 is mounted on the top of the telescopic end of the multi-stage hydraulic cylinder 2, and the connector 11 has symmetrically arranged connecting holes 12 inside. A rubber ring 9 is fixedly connected to the top of the clearance hole 8, and the rubber ring 9 and the pressing plate 10 cooperate with each other. A silicone pad 15 is fixedly connected to the bottom of the stabilizing seat 13, and the silicone pad 15 is also arranged in a cross shape. Heat dissipation grooves 16 for heat dissipation of the multi-stage hydraulic cylinder 2 are equidistantly arranged on both sides of the interior of the mounting base 1.

[0033] In this embodiment, a connector 11 and symmetrical connecting holes 12 are provided at the top of the telescopic end to facilitate rigid connection with other mechanical components, ensuring uniform force transmission and avoiding deformation or loosening caused by single-point force. A rubber ring 9 is added to the top of the clearance hole 8, which cooperates with the pressing plate 10 to form a soft contact buffer, further absorbing impact energy, reducing noise, and protecting the internal structure of the cylinder. A cross-shaped silicone pad 15 is provided at the bottom of the stabilizing seat 13 to enhance the shock absorption effect during installation, prevent vibration from being transmitted to the supporting structure, and provide anti-slip function to improve safety. Equidistant heat dissipation grooves 16 are opened inside the mounting seat 1 to promote heat dissipation during the operation of the multi-stage cylinder 2, prevent hydraulic oil overheating failure, and maintain long-term stable operation of the cylinder.

[0034] Working principle: When the telescopic end of the multi-stage cylinder 2 extends, the connecting plate 7 rises synchronously with the stabilizer bar 6, and the buffer spring 4 remains in a naturally extended state. At this time, the pressing plate 10 separates from the clearance hole 8, and the system is in an unbuffered state. When the telescopic end retracts, the pressing plate 10 first contacts the rubber ring 9 on the edge of the clearance hole 8 to form initial buffer. As the retraction stroke continues, the pressing plate 10 pushes the connecting plate 7 down, causing the stabilizer bar 6 and the lifting block 5 to slide down along the slide column 3. At this time, the buffer spring 4 is compressed and generates a reverse force, converting mechanical energy into elastic potential energy and effectively absorbing impact energy. During this process, the flexible contact between the rubber ring 9 and the pressing plate 10 further attenuates vibration and reduces noise. The cross-shaped stabilizer seat 13 is rigidly connected to the external structure through the mounting hole 14, and works with the silicone pad 15 at the bottom to achieve secondary shock absorption, ensuring overall stability. At the same time, the heat dissipation grooves 16 on both sides of the mounting seat 1 accelerate the dissipation of heat during the operation of the multi-stage cylinder 2 through air convection, maintaining the temperature stability of the hydraulic system, thereby ensuring the reliability and durability of the cylinder under long-term operation. This design integrates buffer protection, vibration suppression, and thermal management throughout the entire travel of the telescopic end.

[0035] 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 hydraulic cylinder, comprising a mounting base (1), characterized in that: The mounting base (1) is internally fixedly connected to a multi-stage hydraulic cylinder (2). The mounting base (1) is internally provided with a buffer mechanism, which includes a buffer component and a mounting component. The buffer component and the mounting component cooperate with each other. The buffer assembly includes sliding columns (3), which are symmetrically fixedly connected inside the mounting base (1). Buffer springs (4) are sleeved on the outer sides of the two sliding columns (3). Lifting blocks (5) are sleeved on the outer sides of the two sliding columns (3) and above the buffer springs (4). Stabilizing rods (6) are symmetrically slidably connected to both sides of the top of the mounting base (1). The bottom of the stabilizing rods (6) is fixedly connected to the top of the lifting blocks (5). A connecting plate (7) is provided on the outer side of the telescopic end of the multi-stage cylinder (2). The bottom of the connecting plate (7) is fixedly connected to the top of the stabilizing rods (6). An clearance hole (8) is opened inside the connecting plate (7). A pressing plate (10) is fixedly connected to the outer side of the telescopic end of the multi-stage cylinder (2). The size of the pressing plate (10) is larger than the size of the clearance hole (8). The pressing plate (10) and the clearance hole (8) are used in cooperation with each other.

2. An adjustable hydraulic cylinder according to claim 1, characterized in that: The mounting assembly includes a stabilizing base (13), which is fixedly connected to the bottom of the mounting base (1). The stabilizing base (13) is cross-shaped, and the interior of the stabilizing base (13) has mounting holes (14) arranged in a rectangular array. The mounting holes (14) are used in conjunction with external mounting bolts.

3. An adjustable hydraulic cylinder according to claim 1, characterized in that: The top of the telescopic end of the multi-stage cylinder (2) is equipped with a connector (11), and the connector (11) has symmetrically opened connecting holes (12) inside.

4. An adjustable hydraulic cylinder according to claim 1, characterized in that: A rubber ring (9) is fixedly connected to the top of the clearance hole (8), and the rubber ring (9) and the pressing plate (10) are used in conjunction with each other.

5. An adjustable hydraulic cylinder according to claim 2, characterized in that: The bottom of the stabilizer (13) is fixedly connected to a silicone pad (15), which is also cross-shaped.

6. An adjustable hydraulic cylinder according to claim 1, characterized in that: The mounting base (1) has heat dissipation grooves (16) evenly spaced on both sides inside for heat dissipation of the multi-stage oil cylinder (2).

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