Buffering structure for lifting oil cylinder

Abstract

The utility model discloses a buffer structure for a lifting oil cylinder. The buffer structure comprises a cylinder body, a piston is slidably connected into the cylinder body. The center of the piston is fixedly connected with a rod; inserting holes are formed in the centers of the two ends in the cylinder body; a large hole is formed in one surface of the jack away from the piston; a plurality of flow guide holes are formed in the side faces of the two ends of the outer portion of the cylinder body in a circumferential array mode and communicate with the large hole. Small holes corresponding to the flow guide holes in a one-to-one mode are formed in the peripheries of the two ends in the cylinder body, the multiple small holes are sequentially formed from small to large, due to the fact that the flow of hydraulic oil changes, when the piston moves to the two ends of the cylinder body, the buffering and speed reducing effects can be generated, and due to the fact that the sizes of the small holes are different, the buffering and speed reducing effects can be achieved. And different small holes can be communicated through the annular block, so that the purpose of adjusting the oil flow can be achieved, the oil flow adjusting device can adapt to different working conditions, for example, a large small hole is adopted at the high temperature, a small small hole is adopted at the low temperature, the application range is wide, and stability is high.

Description

Technical Field

[0001] This utility model belongs to the field of electroplating equipment technology, and relates to a hydraulic cylinder, specifically a buffer structure for a lifting hydraulic cylinder. Background Technology

[0002] In an electroplating system, the movable platform provides stable support for the workpiece during the electroplating process. By adjusting the platform's position and angle, it ensures the workpiece is correctly positioned within the electroplating tank, thereby achieving a uniform coating distribution. The lifting and lowering operation of the movable platform is primarily achieved through hydraulic cylinders, allowing it to move up and down within the plant for convenient operation.

[0003] In existing technologies, lifting cylinders mainly control the movement of the piston by using different hydraulic pressures on both sides of the piston within the cylinder. Secondly, by utilizing the almost incompressible nature of liquids, the shaft connected to the piston moves back and forth on the cylinder, thereby driving the moving platform to move up and down.

[0004] However, in the existing technology, since the lifting cylinder controls the movement of the piston inside the cylinder body through hydraulic control, the piston is very likely to hit both ends of the cylinder body due to rapid movement during this process, which can damage the cylinder body and reduce its service life.

[0005] Currently, to address the problem of piston impacting the cylinder, those skilled in the art use methods such as controlling the flow rate of oil at both ends of the cylinder to reduce the piston speed at both ends of the cylinder, thereby mitigating the impact force on the cylinder. Specifically, when the piston rod is about to reach its stroke limit, the flow rate of oil in the buffer chamber is restricted, thereby slowing down the movement speed of the piston rod and ultimately allowing the cylinder to stop smoothly.

[0006] However, while controlling the flow rate of the oil can achieve a buffering effect, it becomes very difficult to precisely control the flow rate and pressure under certain high loads and operating conditions. For example, changes in the viscosity of the oil can affect the buffering effect in high or low temperature environments, leading to a decrease in the smoothness of the cylinder movement. This instability may prevent the buffering system from achieving the desired effect under all operating conditions. Utility Model Content

[0007] To address the technical problem in existing technologies where the amount of oil inside the cylinder cannot be controlled when the piston reaches both ends, leading to a deterioration in the buffering effect and a decrease in the smoothness of the cylinder's movement under high load conditions, this utility model provides a buffer structure for lifting cylinders.

[0008] The objective of this utility model can be achieved through the following technical solutions:

[0009] A buffer structure for a lifting cylinder includes a cylinder body; a piston is slidably connected inside the cylinder body; a rod is fixedly connected to the center of the piston; insertion holes are opened at the center of both ends of the cylinder body; a large hole is opened on the side of the insertion hole away from the piston; multiple guide holes in a circumferential array are opened on the sides of both ends of the cylinder body, and all the guide holes are connected to the large hole; small holes corresponding to the guide holes are opened at the periphery of both ends of the cylinder body, and the multiple small holes are arranged in ascending order of size, and all the small holes are connected to the corresponding guide holes; a second plug and a first plug are fixedly connected to the rod at the positions corresponding to the upper and lower sides of the piston, and the first plug and the second plug respectively fit into the corresponding insertion holes; annular grooves are opened at the upper and lower ends of the outer wall of the cylinder body at the positions corresponding to the guide holes; annular blocks are rotatably connected in the annular grooves; and hollow tubes are fixedly connected to the outer side of the annular blocks.

[0010] Furthermore, the cylinder body is provided with fixing plates at both the upper and lower ends, and the fixing plates are square in shape; long rods are provided through the four corners of the two fixing plates, and nuts are threaded onto the long rods at the positions corresponding to the outer surfaces of the fixing plates.

[0011] Furthermore, the fixing plate has a notch corresponding to the position of the guide hole; the fixing plate has a limit block corresponding to the position of the notch; the upper part of the limit block has a circular hole structure, and the corresponding hollow tube is sleeved in it, and the lower part has a rectangular structure; a screw is provided at the notch.

[0012] Furthermore, the upper end of the rod extends to the outside of the upper end face of the cylinder; the upper end of the rod is threaded.

[0013] Furthermore, the inner diameter of the hollow tube is equal to the inner diameter of the guide hole.

[0014] Furthermore, the outer wall of the ring block is provided with anti-slip texture.

[0015] Furthermore, a first rubber ring is fixedly provided on the side of the piston; and a second rubber ring is fixedly provided on the inner wall of the ring block in a symmetrical arrangement.

[0016] The beneficial effects of this utility model are:

[0017] 1) Because each guide hole in this invention has a different size, when the piston inside the cylinder moves to the end of the cylinder, the first or second plunger will first insert into the large hole and block it, while the remaining hydraulic oil flows in through the small hole. At this time, because the flow rate of the hydraulic oil changes, a buffering and deceleration effect will be generated when the piston moves to both ends of the cylinder. Since the size of each small hole is different, and different small holes can be connected by an annular block, the purpose of adjusting the oil flow rate can be achieved. This allows it to be adapted to different working conditions, such as using a larger small hole at high temperatures and a smaller small hole at low temperatures. It has a wide range of applications and high stability. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0021] Figure 3 This is a cross-sectional view of the cylinder block in this utility model;

[0022] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the ring block in this utility model;

[0024] Figure 6 This is a schematic diagram of the annular groove in this utility model;

[0025] The attached diagram lists the components represented by each number as follows:

[0026] 1. Cylinder block; 2. Rod body; 3. Thread; 4. Nut; 5. Fixing plate; 6. Long rod; 7. Piston; 8. First rubber ring; 9. First plunger; 10. Second plunger; 11. Insertion hole; 12. Large hole; 13. Guide hole; 14. Small hole; 15. Ring groove; 16. Ring block; 17. Hollow tube; 18. Second rubber ring; 19. Anti-slip texture; 20. Notch; 21. Limiting block; 22. Screw. Detailed Implementation

[0027] 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.

[0028] Please see Figure 1 - Figure 3As shown, a buffer structure for a lifting cylinder includes a cylinder body 1; a piston 7 is slidably connected inside the cylinder body 1; a first rubber ring 8 is fixedly installed on the side of the piston 7, which is used to improve the sealing of both sides of the piston 7 inside the cylinder body 1; a rod 2 is fixedly connected to the center of the piston 7, and the upper end of the rod 2 extends to the outside of the upper end face of the cylinder body 1; a thread 3 is opened on the upper end of the rod 2; fixing plates 5 are provided at the upper and lower ends of the cylinder body 1, and the fixing plates 5 are square in structure; long rods 6 are provided through the four corners of the two fixing plates 5, and nuts 4 are threaded to the long rods 6 at the positions corresponding to the outer surface of the fixing plates 5, and the nuts 4 are used to fix the cylinder body 1 in conjunction with the long rods 6.

[0029] Please refer to it again. Figure 3 - Figure 5 As shown, an insertion hole 11 is provided at the center of both ends of the cylinder body 1; a large hole 12 is provided on the side of the insertion hole 11 away from the piston 7; multiple guide holes 13 in a circular array are provided on the sides of both ends of the cylinder body 1, and all of the guide holes 13 are connected to the large hole 12; small holes 14 corresponding to the guide holes 13 are provided at the periphery of both ends of the cylinder body 1, and the multiple small holes 14 are arranged in order from small to large, and all of the small holes 14 are connected to the corresponding guide holes 13; a second plug 10 and a first plug 9 are fixedly connected to the rod body 2 at the positions corresponding to the upper and lower sides of the piston 7, and the first plug 9 and the second plug 10 are respectively fitted with the corresponding insertion hole 11.

[0030] Please refer to it again. Figure 4 and Figure 6 As shown, annular grooves 15 are provided at the upper and lower ends of the outer wall of cylinder 1, corresponding to the positions of the guide hole 13; annular blocks 16 are rotatably connected inside the annular grooves 15; hollow tubes 17 are fixed to the outer side of the annular blocks 16; the inner diameter of the hollow tubes 17 is equal to the inner diameter of the guide hole 13.

[0031] Please refer to it again. Figure 5 As shown, the outer wall of the ring block 16 is provided with anti-slip texture 19. The anti-slip texture 19 is used to increase the friction between the operator's palm and the ring block 16, so as to facilitate the rotation of the ring block 16.

[0032] Please refer to it again. Figure 5 As shown, a second rubber ring 18 is fixedly provided on the inner wall of the ring block 16 in a symmetrical arrangement. The second rubber ring 18 is used to increase the airtightness between the guide hole 13 and the ring block 16.

[0033] Please refer to it again. Figure 1 and Figure 2As shown, the fixing plate 5 has a notch 20 at the position corresponding to the guide hole 13; the fixing plate 5 is provided with a limiting block 21 at the position corresponding to the notch 20. The upper part of the limiting block 21 is provided with a circular hole structure, and the corresponding hollow tube 17 is sleeved in it to help fix the relative position of the hollow tube 17 and the guide hole 13. The lower part is rectangular to help fix the position of the limiting block 21; a screw 22 is provided at the notch 20, and the screw 22 fixes the limiting block 21 inside the notch 20.

[0034] To facilitate understanding of the above-mentioned technical solution of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below:

[0035] When different intensity working conditions are required, the operator first removes the screw 22 from the notch 20, and then removes the limiting block 21 from the hollow tube 17. At the same time, the operator adjusts the ring block 16 located at the upper and lower ends of the cylinder body 1 so that it rotates on the ring groove 15. When the hollow tube 17 on the ring block 16 rotates to another position and connects with another guide hole 13, it can connect with the corresponding small hole 14. At this time, since the size of the small hole 14 corresponding to each guide hole 13 is different, when the piston 7 inside the cylinder 1 moves to the end of the cylinder 1, the first plunger 9 or the second plunger 10 will first insert into the large hole 12 and block the large hole 12, while the remaining hydraulic oil flows in through the small hole 14. It is worth noting that, since the flow rate of the hydraulic oil changes, a buffering and deceleration effect will occur when the piston 7 moves to both ends of the cylinder 1. Since the size of each small hole 14 is different, and different small holes 14 can be connected by the annular block, the purpose of adjusting the oil flow rate can be achieved, so that it can be adapted to different working conditions. For example, a larger small hole 14 is used at high temperature and a smaller small hole 14 is used at low temperature, which has a wide range of applications and high stability.

[0036] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0037] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A buffer structure for a lifting cylinder, comprising a cylinder body (1); a piston (7) is slidably connected inside the cylinder body (1); a rod (2) is fixedly connected to the center of the piston (7); characterized in that: The cylinder body (1) has an insertion hole (11) at the center of both ends inside; a large hole (12) is provided on the side of the insertion hole (11) away from the piston (7); a plurality of guide holes (13) in a circular array are provided on the side of both ends outside the cylinder body (1), and the guide holes (13) are all connected to the large hole (12). The cylinder body (1) has small holes (14) at both ends of its periphery that correspond one-to-one with the guide holes (13). These multiple small holes (14) are arranged in order from small to large, and each small hole (14) is connected to the corresponding guide hole (13). The rod (2) is fixed with a second plug (10) and a first plug (9) at positions corresponding to the upper and lower sides of the piston (7), respectively. The first plug (9) and the second plug (10) are respectively matched with the corresponding insertion holes (11); The cylinder body (1) has annular grooves (15) at the upper and lower ends of the outer wall corresponding to the positions of the guide hole (13); annular blocks (16) are rotatably connected in the annular grooves (15); and hollow tubes (17) are fixed to the outer side of the annular blocks (16).

2. The buffer structure for the lifting cylinder according to claim 1, characterized in that: The cylinder body (1) is provided with fixing plates (5) at both the upper and lower ends. The fixing plates (5) are square in shape. Long rods (6) are provided through the four corners of the two fixing plates (5). Nuts (4) are threaded (3) on the long rods (6) corresponding to the positions on the outer surface of the fixing plates (5).

3. The buffer structure for the lifting cylinder according to claim 2, characterized in that: The fixing plate (5) has a notch (20) at the position corresponding to the guide hole (13); the fixing plate (5) is provided with a limit block (21) at the position corresponding to the notch (20); The upper part of the limiting block (21) is provided with a circular hole structure, and the corresponding hollow tube (17) is sleeved in it, and the lower part is a rectangular structure; a screw (22) is provided at the notch (20).

4. The buffer structure for the lifting cylinder according to claim 1, characterized in that: The upper end of the rod (2) extends through to the outside of the upper end face of the cylinder (1); the upper end of the rod (2) is provided with a thread (3).

5. The buffer structure for lifting cylinders according to claim 1, characterized in that: The inner diameter of the hollow tube (17) is equal to the inner diameter of the guide hole (13).

6. The buffer structure for the lifting cylinder according to claim 1, characterized in that: The outer wall of the ring block (16) is provided with anti-slip texture (19).

7. The buffer structure for the lifting cylinder according to claim 1, characterized in that: A first rubber ring (8) is fixedly provided on the side of the piston (7); a second rubber ring (18) is fixedly provided on the inner wall of the ring block (16) in a symmetrical arrangement.

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