Improved hydraulic oil cylinder with buffering function

Abstract

The utility model discloses an improved hydraulic oil cylinder with a buffering function, and relates to the technical field of hydraulic oil cylinders. The oil cylinder comprises an oil cylinder body, an oil barrel, a sealing ring embedded in the upper end of the oil barrel, a plug rod inserted in the sealing ring in a sliding mode, a moving piston located at the lower end of the plug rod and installed in the oil barrel in a sliding mode, and a first oil pipe and a second oil pipe installed in the two ends of the oil barrel in a penetrating mode. A buffer structure, comprising an upper piston, a lower piston, a top ring, an upper spring, a second oil duct, a partition plate, a lower spring and a first oil duct, wherein the upper piston is slidably connected to the outer wall of a piston rod in a sleeving manner; the lower piston is slidably mounted in the lower end of an oil barrel; the top ring is located at the upper end of the upper piston; according to the utility model, the buffer structure is arranged, so that the problems that the hydraulic oil cylinder suddenly stops at the tail end or the movement end point, large impact and vibration are caused, and the abrasion of equipment parts is increased are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinders, in particular to an improved hydraulic oil cylinder with a buffer function. Background Art

[0002] The hydraulic cylinder converts the kinetic energy of the fluid in the hydraulic system into mechanical motion energy, and drives the piston to perform linear motion in the cylinder through the high pressure of the liquid. It is a device that generates linear motion through liquid pressure. The hydraulic cylinder can control the piston position by changing the input hydraulic oil pressure, thereby achieving linear position adjustment. During use, the impact at the end will cause the cylinder to vibrate.

[0003] A Chinese patent discloses a hydraulic cylinder assembly (authorization announcement number CN201843850U). The patented technology includes a cylinder and a guide sleeve, a piston, and a piston rod housed in the cylinder, wherein the guide sleeve is fixed to one end of the cylinder, and a plurality of rubber sealing rings are provided between the guide sleeve and the contact surface of the cylinder; a copper sleeve is further provided on the inner surface of the guide sleeve; the piston moves along the extension direction of the cylinder; one end of the piston rod is connected to the piston and pushes the piston to move, and the piston rod passes through the guide sleeve, and the copper sleeve of the guide sleeve is abutted against the piston rod. The hydraulic cylinder assembly of the utility model is provided with a copper sleeve with high strength and good finish on the inner surface of the guide sleeve, so that the guide sleeve and the piston rod are not easily worn during long-term movement, thereby improving the sealing performance of the entire hydraulic cylinder and extending its service life.

[0004] This patented technology has good sealing performance when used, but it still has some shortcomings when used. The hydraulic cylinder will suddenly stop at the end or the end of the movement, which will cause greater impact and vibration, increase the wear of equipment parts, and have an adverse effect on the system. Therefore, those skilled in the art provide an improved hydraulic cylinder with a buffering function to solve the problems raised in the above background technology. Utility Model Content

[0005] 1. Technical solution

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The utility model is an improved hydraulic cylinder with a buffer function, comprising:

[0008] The oil cylinder body includes an oil barrel, a sealing ring embedded in the upper end of the oil barrel, a plug rod slidably inserted into the sealing ring, a moving piston located at the lower end of the plug rod and slidably installed in the oil barrel, and oil pipes 1 and 2 installed inside the two ends of the oil barrel;

[0009] as well as;

[0010] The buffer structure includes an upper piston slidably sleeved on the outer wall of the plug rod, a lower piston slidably installed inside the lower end of the oil cylinder, a top ring located at the upper end of the upper piston, an upper spring fixed to the top ring, a second oil passage opened on the inner walls on both sides of the upper end of the oil cylinder and located above the upper piston, a partition located below the lower piston and fixed to the inner wall of the oil cylinder, a lower spring fixed between the partition and the lower piston, and an oil passage opened on the inner walls on both sides of the lower end of the oil cylinder and with openings at both ends located on the upper and lower sides of the partition respectively.

[0011] Furthermore, an upper end opening of the oil passage is located below the lower piston;

[0012] Specifically, when the lower piston squeezes the interior of the lower end, the hydraulic oil in the internal spaces at the upper and lower ends of the partition flows through the oil channel 1 in the spaces on the upper and lower sides of the partition.

[0013] Furthermore, the oil pipe 1 and the oil pipe 2 are located on the upper and lower sides of the moving piston, the upper piston is located at the upper end of the oil pipe 1, and the lower piston is located below the oil pipe 2;

[0014] Specifically, the oil pipe 1 and the oil pipe 2 control the hydraulic oil to control the hydraulic oil in the spaces above and below the moving piston.

[0015] Furthermore, the outer side of the upper spring is sleeved with a sleeve frame which is annularly fixed on the inner wall of the upper end of the oil cylinder and sleeved on the outer side of the top ring, and the openings at both ends of the oil channel are located at the upper and lower sides of the sleeve frame;

[0016] Specifically, the sleeve frame limits the upper spring, and the upper spring is limited when it is extended and retracted. In the space above the upper piston, the hydraulic oil in the spaces above and below the sleeve frame flows through the second oil channel.

[0017] Furthermore, a base is provided at the lower end of the oil cylinder, mounting holes are provided at the four corners of the base, and a mounting ring is provided at the upper end of the plug rod;

[0018] Specifically, the base is used to install the oil cylinder, the fixing part is inserted through the installation hole, and the installation ring is convenient for docking with the structural part.

[0019] Furthermore, the lower end of the lower piston is provided with a guide rod located inside the lower spring, a sliding sleeve is embedded and installed inside the partition, and the lower end of the guide rod is slidably inserted into the sliding sleeve;

[0020] Specifically, when the lower spring is extended or retracted, it is limited by the guide rod, and when the guide rod is squeezed, it is slidably guided by the sliding sleeve.

[0021] 2. Beneficial effects

[0022] Compared with the prior art, the advantages of the present invention are:

[0023] In the utility model, the oil pipe 1 and the oil pipe 2 deliver and suck the hydraulic oil between the upper piston and the lower piston inside the moving oil cylinder, control the pressure between the moving pistons, and then drive the plug rod to move linearly;

[0024] At the same time, the upper piston and the lower piston are elastically supported by the upper spring and the lower spring respectively. When the moving piston reaches the end, the impact force acts on the upper spring or the lower spring. During the extrusion process, the hydraulic oil in the space has a damping effect on the upper spring and the lower spring through the narrow oil channel 1 and oil channel 2, thereby achieving shock absorption and buffering of the moving piston and effectively protecting the hydraulic cylinder.

[0025] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is a schematic diagram of the main three-dimensional structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the main sectional three-dimensional structure of the utility model;

[0029] Figure 3 This is a side sectional three-dimensional structural diagram of the utility model;

[0030] Figure 4 This is a schematic diagram of the three-dimensional structure of the lower piston in a side cross-section of the present invention;

[0031] Figure 5 It is a schematic diagram of the three-dimensional structure of the upper piston in a side cross-section of the present utility model.

[0032] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0033] 100, oil cylinder body; 101, oil cylinder; 102, plug rod; 103, moving piston; 104, sealing ring; 105, mounting ring; 106, base; 107, oil pipe 1; 108, oil pipe 2;

[0034] 200. Buffer structure; 201. Lower piston; 202. Lower spring; 203. Partition plate; 204. Oil passage 1; 205. Guide rod; 206. Sliding sleeve; 207. Frame; 208. Upper spring; 209. Top ring; 210. Upper piston; 211. Oil passage 2. DETAILED DESCRIPTION

[0035] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0036] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] Next, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, cross-sectional views of device structures may be partially enlarged and not to scale when describing the embodiments of the present invention. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, three-dimensional dimensions, including length, width, and depth, should be included.

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0039] Example 1

[0040] See also Figure 1-Figure 5 As shown, this embodiment is an improved hydraulic cylinder with a buffer function, comprising:

[0041] The oil cylinder body 100 includes an oil barrel 101, a sealing ring 104 embedded in the upper end of the oil barrel 101, a plug rod 102 slidably inserted into the sealing ring 104, a moving piston 103 located at the lower end of the plug rod 102 and slidably mounted in the oil barrel 101, and oil pipes 107 and 108 that penetrate and are installed in the ends of the oil barrel 101.

[0042] Oil pipe 1 107 and oil pipe 2 108 are located on the upper and lower sides of the moving piston 103 , the upper piston 210 is located at the upper end of oil pipe 107 , and the lower piston 201 is located below oil pipe 2 108 ;

[0043] The lower end of the oil cylinder 101 is provided with a base 106, and the four corners of the base 106 are provided with mounting holes. The upper end of the plug rod 102 is provided with a mounting ring 105;

[0044] Use the oil cylinder body 100;

[0045] When the oil pipe 107 transports the hydraulic oil into the oil cylinder 101, pressure is applied to the upper end of the moving piston 103. At the same time, the hydraulic oil inside the lower end of the moving piston 103 flows out through the oil pipe 2 108. The moving piston 103 slides downward, driving the plug rod 102 to move downward. Similarly, the hydraulic oil is input into the oil cylinder 101 through the oil pipe 2 108, applying pressure to the bottom of the moving piston 103. The hydraulic oil inside the upper end of the moving piston 103 is output through the oil pipe 107. The moving piston 103 slides upward, driving the plug rod 102 to rise. The hydraulic cylinder can be effectively used after being installed through the base 106.

[0046] Example 2

[0047] See also Figure 1-Figure 5 As shown, this embodiment is based on embodiment 1 and also includes:

[0048] as well as;

[0049] The buffer structure 200 includes an upper piston 210 slidably sleeved on the outer wall of the plug rod 102, a lower piston 201 slidably installed inside the lower end of the oil cylinder 101, a top ring 209 located at the upper end of the upper piston 210, an upper spring 208 fixed to the top ring 209, an oil passage 211 opened on the inner walls on both sides of the upper end of the oil cylinder 101 and located above the upper piston 210, a partition 203 located below the lower piston 201 and fixed on the inner wall of the oil cylinder 101, a lower spring 202 fixed between the partition 203 and the lower piston 201, and an oil passage 1 204 opened on the inner walls on both sides of the lower end of the oil cylinder 101 and with openings at both ends located on the upper and lower sides of the partition 203 respectively.

[0050] The upper end opening of the oil passage 1 204 is located below the lower piston 201;

[0051] The outer side of the upper spring 208 is sleeved with a ring-shaped sleeve frame 207 fixed on the inner wall of the upper end of the oil cylinder 101 and sleeved on the outer side of the top ring 209. The openings of the second oil channel 211 are located at the upper and lower sides of the sleeve frame 207.

[0052] The lower end of the lower piston 201 is provided with a guide rod 205 located inside the lower spring 202, and a sliding sleeve 206 is embedded in the partition 203. The lower end of the guide rod 205 is slidably inserted into the sliding sleeve 206;

[0053] Using the buffer structure 200;

[0054] During the longitudinal movement of the moving piston 103, when the moving piston 103 is lifted to the end, the impact force acts on the upper piston 210. The upper piston 210 is forced to squeeze the upper spring 208 through the top ring 209. The upper spring 208 is forced to shrink, and the hydraulic oil in the space between the outer side of the upper end of the sleeve 207 and the oil cylinder 101 is squeezed. The hydraulic oil is input through the upper end opening of the second oil channel 211 and output through the lower end opening. The output is also located in the space above the upper piston 210. When the hydraulic oil flows through the second oil channel 211, due to the narrow flow channel, a damping effect is applied to the telescopic upper spring 208, thereby achieving a buffer for the moving piston 103 and reducing the vibration caused by the impact force at the end.

[0055] When the moving piston 103 descends to the end, the impact force acts on the lower piston 201. The lower piston 201 is forced to apply an extrusion force to the lower spring 202. When the lower spring 202 is extended and contracted, it drives the guide rod 205 to slide inside the sleeve 206 to guide the lower spring 202. The hydraulic oil in the internal space at the upper end of the partition 203 flows through the oil channel 204. The hydraulic oil in the oil channel 204 through the narrow flow channel exerts a damping effect on the lower spring 202. The upper and lower ends of the oil cylinder 101 are buffered. Without the buffer structure 200, the piston will directly collide with the end point when moving rapidly, which increases the wear of equipment parts and may even cause mechanical damage. The buffer structure 200 reduces the direct impact force of the moving piston 103 when it reaches the end, plays a role in buffering and shock absorption, and effectively protects the hydraulic cylinder.

[0056] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0057] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An improved hydraulic cylinder with a buffer function, characterized in that: include, The oil cylinder body (100) comprises an oil barrel (101), a sealing ring (104) embedded in the upper end of the oil barrel (101), a plug rod (102) slidably inserted into the sealing ring (104), a moving piston (103) located at the lower end of the plug rod (102) and slidably installed in the oil barrel (101), and an oil pipe 1 (107) and an oil pipe 2 (108) penetrating and installed in both ends of the oil barrel (101); as well as; The buffer structure (200) comprises an upper piston (210) slidably sleeved on the outer wall of the plug rod (102), a lower piston (201) slidably mounted inside the lower end of the oil cylinder (101), a top ring (209) located at the upper end of the upper piston (210), an upper spring (208) fixedly mounted on the top ring (209), a second oil passage (211) opened on the inner walls on both sides of the upper end of the oil cylinder (101) and located above the upper piston (210), a partition (203) located below the lower piston (201) and fixedly mounted on the inner wall of the oil cylinder (101), a lower spring (202) fixedly mounted between the partition (203) and the lower piston (201), and a first oil passage (204) opened on the inner walls on both sides of the lower end of the oil cylinder (101) and with openings at both ends located on the upper and lower sides of the partition (203).

2. The improved hydraulic cylinder with a buffer function according to claim 1, characterized in that: The upper end opening of the oil passage 1 (204) is located below the lower piston (201).

3. The improved hydraulic cylinder with a buffer function according to claim 1, characterized in that: The oil pipe 1 (107) and the oil pipe 2 (108) are located on the upper and lower sides of the moving piston (103), the upper piston (210) is located at the upper end of the oil pipe 1 (107), and the lower piston (201) is located below the oil pipe 2 (108).

4. The improved hydraulic cylinder with a buffer function according to claim 1, characterized in that: The outer side of the upper spring (208) is sleeved with a sleeve frame (207) in an annular shape fixed on the inner wall of the upper end of the oil cylinder (101) and sleeved on the outer side of the top ring (209). The openings at both ends of the second oil channel (211) are located on the upper and lower sides of the sleeve frame (207).

5. The improved hydraulic cylinder with a buffer function according to claim 1, characterized in that: The lower end of the oil cylinder (101) is provided with a base (106), and mounting holes are opened inside the four corners of the base (106). The upper end of the plug rod (102) is provided with a mounting ring (105).

6. The improved hydraulic cylinder with a buffer function according to claim 1, characterized in that: The lower end of the lower piston (201) is provided with a guide rod (205) located inside the lower spring (202), and a sliding sleeve (206) is embedded and installed inside the partition (203). The lower end of the guide rod (205) is slidably inserted into the sliding sleeve (206).

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