Self-heat-dissipation quick oil cylinder

Abstract

The application relates to a hydraulic oil cylinder, in particular to a self-heat-dissipation quick oil cylinder, which solves the problems of complex structure, insufficient compactness and excessively high temperature rise during long-time work of a quick hydraulic oil cylinder in the prior art. The self-heat-dissipation quick oil cylinder is provided with double pistons and a cooling channel, can realize self-cooling while efficiently working, and has a long service life. In addition, the self-heat-dissipation quick oil cylinder also has excellent sealing performance and will not leak even when working under high pressure. In general, the self-heat-dissipation quick oil cylinder has reasonable design, compact volume, low energy consumption and simple structure, has excellent stability and reliability, can realize quick output while realizing self-cooling of the cylinder body, and meets the actual production demand.

Description

Technical Field

[0001] This disclosure relates to a hydraulic cylinder, specifically a self-cooling, fast-acting hydraulic cylinder. Background Technology

[0002] In recent years, my country's hydraulic industry has undergone a process of transformation from imitation to independent research and development, and from reliance on imports to achieving self-sufficiency. Hydraulic cylinders, as key hydraulic components, use hydraulic fluid as their working medium, transmitting motion through changes in sealed volume and power through internal fluid pressure. With the rapid development of the entire industry, China's hydraulic cylinder industry has also embarked on a path of rapid growth. Hydraulic cylinders are actuators in hydraulic systems that convert hydraulic energy into mechanical energy. They are specialized components for various mining machinery, engineering machinery, special vehicles, and large machinery, playing a crucial role in industrial production. They can be used in forging machinery, machine tools, injection molding machines, mining machinery, robots, machining centers, and packaging machinery, among others.

[0003] In today's highly mechanized society, with the sustained, healthy, and rapid development of my country's economy, the construction of various major infrastructure projects has entered a new peak. While the demand for engineering machinery has increased significantly, new requirements have also been placed on hydraulic cylinders: for example, some mechanical equipment requires hydraulic cylinders to have faster response speeds. When a hydraulic cylinder has a large mass or a heavy load, its movement speed will be relatively high. During operation, due to its large inertial force, it will have a large momentum. In such cases, when the piston moves to the end of the cylinder, it will directly collide with the end cap, generating significant impact and noise, which will directly affect machining accuracy.

[0004] Application No. 202110289786.3 discloses a novel rapid-action hydraulic cylinder with an accumulator, comprising a rapid cylinder body, an accumulator body, and a second injector. This disclosure employs the rapid cylinder body and the accumulator body working in conjunction. The accumulator body applies pressure to the rapid cylinder body. The rapid cylinder body requires the accumulator to function together for faster piston rod speed. High-speed seals are used, allowing the piston rod speed to reach up to 15 m / s. During piston rod extension and retraction, a momentary pressure increase is generated. The accumulator body absorbs this energy and supplies it to the rapid cylinder body, increasing the force pushing the piston rod and thus increasing its speed with lower energy consumption. Furthermore, during piston rod extension and retraction, oil can be injected into the accumulator body through the first and second injectors to increase the energy stored within the accumulator, providing stronger power to the rapid cylinder and further accelerating the piston rod's movement. However, the hydraulic cylinder provided in this application requires an accumulator to achieve rapid operation, and the accumulator occupies a certain volume, making it unsuitable for use in confined spaces.

[0005] The invention disclosed in patent application CN110500334B is a rapid-movement hydraulic cylinder, comprising a cylinder body with a second oil port at its upper end; an upper cylinder cover; a piston body including a piston head and a piston rod, with a guide hole inside the piston body; a compensating piston slidably disposed within the cylinder body; a lower cylinder cover with a first oil port at its lower end; a sequence valve located at the upper end of the piston rod; and a three-position, three-way hydraulic directional valve disposed within the lower cylinder cover, having a first interface, a second interface, a third interface, a first control port, and a second control port. Overall, this invention has a simple structure and compact size, eliminating the need for an external filling oil tank, filling valve, and pump assembly, and can automatically achieve rapid forward and slow working feed switching and pressure relief. However, when the hydraulic cylinder moves rapidly, a significant temperature rise is inevitable within the cylinder body, leading to excessively high local temperatures. Excessive temperature accelerates the aging of the seals, reduces sealing performance, and causes external leakage and oil seepage that are difficult to clean, further reducing the service life of the hydraulic cylinder.

[0006] In summary, while existing technologies have solved the problem of slow cylinder reciprocating speed, they require additional equipment, resulting in excessively large and complex hydraulic cylinders that are difficult to use in confined spaces. Furthermore, existing technologies cannot control the cylinder's temperature rise while simultaneously achieving rapid output. Therefore, to meet the demands of actual production, it is essential to adopt practical methods to accelerate cylinder output while effectively cooling the cylinder. Summary of the Invention

[0007] To address the problems of complex structure, insufficient size, and excessive temperature rise during prolonged operation of existing high-speed hydraulic cylinders, this disclosure provides a self-cooling high-speed hydraulic cylinder. This self-cooling high-speed hydraulic cylinder features a reasonable design, compact size, and simple structure, exhibiting high stability and a long service life. It achieves rapid output while simultaneously cooling its own cylinder body, meeting the needs of actual production.

[0008] One of the concepts disclosed herein is to provide a self-cooling rapid hydraulic cylinder, which is provided with a cooling channel. The cooling medium in the cooling channel serves both cooling and lubrication functions, enabling rapid output while simultaneously cooling the cylinder body itself.

[0009] Another aspect of this disclosure is that the self-cooling rapid hydraulic cylinder is equipped with a reset mechanism, which can improve the working efficiency and stability of the hydraulic cylinder.

[0010] Another concept of this disclosure is the self-cooling rapid hydraulic cylinder, in which a first piston and a second piston are arranged in series. The two pistons work together to greatly shorten the reaction time of the reset mechanism, accelerate the reciprocating speed of the hydraulic cylinder, and improve the working efficiency of the hydraulic cylinder.

[0011] The self-cooling rapid hydraulic cylinder includes a cylinder body, a second cavity is provided inside the upper end of the cylinder body, and a second piston is provided inside the second cavity.

[0012] The cylinder block is provided with a second oil inlet / outlet, which is connected to the second chamber.

[0013] In some embodiments, the upper end of the cylinder is provided with a protrusion, and the second cavity is disposed inside the protrusion.

[0014] The cylinder body has a first cavity inside, a first piston is installed in the first cavity, and a first oil inlet / outlet is provided on the cylinder body, which is connected to the first cavity.

[0015] The cylinder block is provided with a cooling channel and a slide, and the slide is connected to the first cavity.

[0016] The first and second pistons operate synchronously during the operation of the hydraulic cylinder, and when they work together, they have a higher reciprocating speed than a single piston.

[0017] Furthermore, a reset rod is provided on one side of the first piston, and a piston rod is provided on the other side, while the second piston is provided on one side of the reset rod.

[0018] The reset rod is slidably connected to the slide rail, and the free end of the reset rod is located on the outside of the cylinder body.

[0019] The cooling channel is located on the side of the cylinder block where a slide is provided.

[0020] The cooling channel includes an inlet channel and an outlet channel, both of which are connected to a slide rail. The cooling medium enters the slide rail through the inlet channel and flows out through the outlet channel. The cooling channel can form a ring-shaped structure surrounding the first cavity within the slide rail, providing a large heat absorption area and excellent cooling effect. The inner wall of the slide rail is provided with a first seal and a second seal to prevent leakage of the working medium.

[0021] Sealing devices are essential components of hydraulic systems. They prevent leakage of the working medium, including internal and external leakage. In addition, seals prevent air and dust from entering hydraulic components and the hydraulic system. Although seals are auxiliary components in hydraulic systems, their quality directly affects the normal operation of the hydraulic system. The quality of seals significantly restricts the performance, reliability, and service life of hydraulic components and systems, and is one of the main factors contributing to the quality differences between domestic and international hydraulic components. The loss caused by the failure of a single seal can often be thousands of times the value of the seal itself.

[0022] In some embodiments, the sealing device further includes a third seal.

[0023] In some embodiments, even if the seal is damaged, the working medium will not leak, and the working medium can flow out from the outlet channel.

[0024] The inner wall of the slide is provided with a guide sleeve, which is located between the first seal and the second seal. The guide sleeve provides a support for the oil seal of the cylinder port. More importantly, the guide sleeve supports and ensures the coaxiality of the reset rod and the cylinder body. It requires high fitting precision, low frictional resistance, good wear resistance, and the ability to withstand the pressure, bending force, and impact movement of the reset rod.

[0025] In some embodiments, the cooling channel is located on the side of the cylinder block with a slide, away from the piston rod.

[0026] In some embodiments, the free end of the reset rod is provided with a reset mechanism and a limiting block, wherein the limiting block is used to limit the reset mechanism.

[0027] Furthermore, the limiting block is provided with at least one working hole to facilitate the disassembly and installation of the limiting block.

[0028] Compared with existing products, the advantages of this disclosure are:

[0029] (1) The self-cooling rapid hydraulic cylinder has a reasonable design, simple assembly, low energy consumption, and high reliability;

[0030] (2) The self-cooling rapid oil cylinder is equipped with two pistons. The two pistons are connected in series and work together, which has a stable structure and high working efficiency.

[0031] (3) The self-cooling fast cylinder is equipped with a cooling channel, which can cool itself while the cylinder is working efficiently, so that the cylinder has a long service life.

[0032] (4) The self-cooling fast cylinder has excellent sealing performance and will not leak even when working under high pressure. Attached Figure Description

[0033] The present application will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be construed as limiting the scope of the present application. Furthermore, unless specifically indicated, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated depictions, and the drawings are not necessarily drawn to scale.

[0034] Figure 1This is one of the three-dimensional schematic diagrams of a self-cooling rapid hydraulic cylinder disclosed herein;

[0035] Figure 2 This is the second three-dimensional schematic diagram of a self-cooling rapid hydraulic cylinder disclosed herein;

[0036] Figure 3 This is the third three-dimensional schematic diagram of a self-cooling rapid hydraulic cylinder disclosed herein;

[0037] Figure 4 This is a cross-sectional schematic diagram of a self-cooling rapid hydraulic cylinder disclosed herein.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Locking nut; 2. Limiting block; 3. Reset mechanism; 4. Liquid inlet channel; 5. Second oil inlet / outlet; 6. First oil inlet / outlet; 7. Working hole; 8. Liquid outlet channel; 11. Limiting block protrusion; 12. Cylinder body protrusion; 100. Second piston; 101. First seal; 102. Second seal; 103. Third seal; 104. Guide sleeve; 105. Slide rail; 200. First piston; 300. Reset rod; 400. Piston rod. Detailed Implementation

[0040] To enable those skilled in the art to better understand the technical solutions of this disclosure, the following detailed, clear, and complete description of this disclosure is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this disclosure and are not intended to limit it.

[0041] One embodiment of this disclosure discloses a self-cooling, fast-acting hydraulic cylinder. See [link to relevant documentation]. Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown.

[0042] The self-cooling rapid hydraulic cylinder includes a cylinder body, with a protrusion 12 at the upper end of the cylinder body. A second cavity is provided inside the protrusion 12, and a second piston 100 is provided inside the second cavity.

[0043] Furthermore, the cylinder body is provided with a first cavity, and a first piston 200 is provided in the first cavity, and the first piston 200 and the second piston 100 are connected in series.

[0044] Furthermore, the cylinder body is provided with a cooling channel and a slide 105, the axis of the slide 105 is on the same straight line as the axis of the cylinder body, and the slide 105 is connected to the first cavity.

[0045] Furthermore, the diameter of the first cavity is larger than the diameter of the second cavity.

[0046] In some embodiments, a reset rod 300 is provided on one side of the first piston 200, and a piston rod 400 is provided on the other side. The second piston 100 is provided on one side of the reset rod 300. The upper end of the piston rod 400 is connected to the first piston 200, and the lower end passes through the bottom of the cylinder body, allowing for external connection of working components.

[0047] Furthermore, the reset rod 300 is slidably connected to the slide rail 105, and the free end of the reset rod 300 is located on the outside of the cylinder body.

[0048] Furthermore, the free end of the reset rod 300 is provided with a reset mechanism 3, which can be a spring, preferably a double spring.

[0049] Furthermore, the free end of the reset rod 300 is provided with a limiting block 2, which is used to limit the position of the reset mechanism 3.

[0050] In one embodiment of this disclosure, the free end of the reset rod 300 is provided with a threaded section, and the limiting block 2 is provided with a threaded hole. The limiting block 2 is screwed into the threaded section of the reset rod 300 through the threaded hole.

[0051] Furthermore, the threaded section of the reset rod 300 is provided with a locking nut 1, which is used to lock and fix the limiting block 2.

[0052] The limiting block 2 is provided with at least one working hole 7 to facilitate the installation and disassembly of the limiting block 2. Preferably, the number of working holes 7 is six.

[0053] Furthermore, the lower end of the limiting block 2 is provided with a protrusion 11, which works together with the protrusion 12 at the upper end of the cylinder to fix the reset mechanism 3.

[0054] In some embodiments, the cooling channel is located on the side of the cylinder block where the slide 105 is provided, away from the piston rod 400.

[0055] In another embodiment of this disclosure, the inner wall of the slide 105 is provided with a first sealing element 101 and a second sealing element 102. Preferably, the inner wall of the slide 105 is further provided with a third sealing element 103, which is located between the first sealing element 101 and the second sealing element 102.

[0056] Furthermore, the inner wall of the slide 105 is also provided with a guide sleeve 104, which is located between the first seal 101 and the second seal 102.

[0057] In another embodiment of this disclosure, the self-cooling rapid-dissipation oil cylinder body is further provided with a first oil inlet / outlet 6 and a second oil inlet / outlet 5. The first oil inlet / outlet 6 communicates with the first cavity, and the second oil inlet / outlet 5 communicates with the second cavity. The first oil inlet / outlet 6 communicates with the first cavity at a position between the second seal 102 and the first piston 200, and the second oil inlet / outlet 5 communicates with the second cavity at a position between the first seal 101 and the second piston 100. The working medium enters the first cavity through the first oil inlet / outlet 6 and enters the second cavity through the second oil inlet / outlet 5.

[0058] In another embodiment of this disclosure, the cooling channel includes an inlet channel 4 and an outlet channel 8, both of which are connected to a slide rail 105. The connection point between the inlet channel 4 and the slide rail 105 is located between the first seal 101 and the second seal 102, and the connection point between the outlet channel 8 and the slide rail 105 is also located between the first seal 101 and the second seal 102.

[0059] The cooling medium enters the slide rail 105 through the inlet channel 4 and flows out through the outlet channel 8. The cooling medium can be oil or water. The cooling channels provide circulating cooling during the operation of the hydraulic cylinder. Simultaneously, the cooling medium flows into the slide rail 105 through the inlet channel 4, providing lubrication and reducing friction, effectively mitigating temperature rise. Furthermore, since both the inlet channel 4 and the outlet channel 8 are connected to the slide rail 105, heat can also be dissipated through these channels, meaning that the inlet channel 4 and the outlet channel 8 themselves also serve a heat dissipation and ventilation function.

[0060] The self-cooling rapid hydraulic cylinder provided in this application has a reasonable design, compact size, low energy consumption, and simple structure. It has excellent stability and reliability, and can achieve rapid output while cooling its own cylinder body, thus meeting the needs of actual production.

[0061] The present application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the present application. The descriptions of the embodiments above are only for the purpose of helping to understand the present application and its core ideas. It should be noted that those skilled in the art can make several improvements and modifications to the present application without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A self-heating, high-speed hydraulic cylinder, characterized in that, The self-cooling rapid oil cylinder includes a cylinder body, a first cavity is provided inside the cylinder body, and a first piston (200) is provided inside the first cavity; a second cavity is provided at the upper end of the cylinder body, and a second piston (100) is provided inside the second cavity, and the first piston (200) and the second piston (100) are connected in series. The cylinder body is provided with a cooling channel and a slide (105), and the slide (105) is connected to the first cavity; a reset rod (300) is provided on one side of the first piston (200), the reset rod (300) is slidably connected to the slide (105), and the free end of the reset rod (300) is located outside the cylinder body, and a reset mechanism (3) is provided on the free end of the reset rod (300); the cooling channel includes a liquid inlet channel (4) and a liquid outlet channel (8), and both the liquid inlet channel (4) and the liquid outlet channel (8) are connected to the slide (105); The free end of the reset rod (300) is provided with a limiting block (2), which is used to limit the reset mechanism (3); the reset mechanism (3) is a spring, and the lower end of the limiting block (2) is provided with a protrusion (11). One end of the spring is sleeved on the protrusion (11) at the lower end of the limiting block (2), and the other end is sleeved on the protrusion (12) at the upper end of the cylinder; the limiting block (2) is provided with at least one working hole (7) to facilitate the disassembly and installation of the limiting block (2); the limiting block (2) is provided with a threaded hole, and the free end of the reset rod (300) is provided with a threaded section. The limiting block (2) is screwed into the threaded section of the reset rod (300) through the threaded hole; the threaded section of the reset rod (300) is provided with a locking nut (1), which is used to lock the limiting block (2).

2. The self-heating rapid-fire hydraulic cylinder according to claim 1, characterized in that, The cylinder body has a protrusion (12) at its upper end, and the second cavity is located inside the cylinder body protrusion (12).

3. The self-heating rapid-fire hydraulic cylinder according to claim 2, characterized in that, The inner wall of the slide (105) is provided with a first seal (101) and a second seal (102), which are used to prevent leakage of the working medium.

4. A self-heating rapid-fire hydraulic cylinder according to claim 3, characterized in that, The cylinder block is provided with a first oil inlet / outlet (6) and a second oil inlet / outlet (5); The first oil inlet / outlet (6) is connected to the first cavity, and the connection between the first oil inlet / outlet (6) and the first cavity is located between the second seal (102) and the first piston (200); The second oil inlet / outlet (5) is connected to the second cavity, and the connection between the second oil inlet / outlet (5) and the second cavity is located between the first seal (101) and the second piston (100).

5. A self-heating rapid-fire hydraulic cylinder according to claim 3, characterized in that, The connection between the liquid inlet channel (4) and the slide (105) is located between the first seal (101) and the second seal (102), and the connection between the liquid outlet channel (8) and the slide (105) is located between the first seal (101) and the second seal (102).

6. A self-heating rapid-fire hydraulic cylinder according to claim 3, characterized in that, A guide sleeve (104) is provided on the inner wall of the slide (105), and the guide sleeve (104) is located between the first seal (101) and the second seal (102).

7. A self-heating rapid-fire hydraulic cylinder according to claim 6, characterized in that, The connection between the liquid inlet channel (4) and the liquid outlet channel (8) is located between the first seal (101) and the second seal (102).

8. A self-heating rapid-fire hydraulic cylinder according to claim 7, characterized in that, A third sealing element (103) is also provided on the inner wall of the slide (105), and the third sealing element (103) is located between the first sealing element (101) and the second sealing element (102).

9. A self-heating rapid-fire hydraulic cylinder according to claim 2, characterized in that, The axis of the slide (105) is on the same straight line as the axis of the cylinder.

Images