Novel rear buffering induction oil cylinder

Abstract

The utility model discloses a novel rear buffering induction oil cylinder which comprises a cylinder body, and a first oil port and a second oil port which can be communicated with a cavity are formed in the side walls of the two ends of the cylinder body. The end, close to the second oil port, of the piston is provided with a buffering plug. The first end cover is connected to the end, close to the first oil port, of the cylinder body; the second end cover is connected to the end, close to the second oil port, of the cylinder body, the second end cover comprises a buffering part and a connecting part connected with the cylinder body, the buffering part is provided with a plug hole used for containing the buffering plug and an oil channel connecting the plug hole and the second oil port, and the buffering part is further provided with an annular groove surrounding the side wall of the buffering part and communicating with the oil channel; a buffering gap is formed between the buffering part and the inner wall of the cavity, and the cavity communicates with the annular groove through the buffering gap. According to the novel rear buffering induction oil cylinder, the buffering chock plug is arranged at one end of the piston, the chock plug hole and the oil channel structure which are matched with each other are arranged on the second end cover, and therefore buffering is achieved when the piston moves to the tail end of the stroke.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder technology, specifically to a novel rear buffer sensing hydraulic cylinder. Background Technology

[0002] During the reciprocating motion of the piston in a hydraulic cylinder, it experiences a strong impact on the rear end cap, affecting the cylinder's lifespan. Therefore, it's necessary to provide appropriate cushioning during piston movement. Existing cylinders with cushioning functions typically employ throttling to achieve this. For example, when the piston retracts, the flow of hydraulic oil from its rear end is reduced by a throttling control valve, thus cushioning the piston. However, this type of cylinder has high overall system complexity, requiring additional devices to address the cushioning issue, resulting in higher costs. Utility Model Content

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a novel rear buffer sensing cylinder. By setting a buffer plug at one end of the piston and setting a matching plug hole and oil passage structure on the second end cover, buffering is achieved when the piston moves to the end of its stroke, reducing the impact force and improving the smoothness of piston operation.

[0004] Technical solution: This utility model discloses a novel rear buffer sensing cylinder, comprising:

[0005] A cylinder body having a chamber extending through its length, and a first oil port and a second oil port communicating with the chamber are provided on the side walls at both ends of the cylinder body;

[0006] Piston, wherein the end of the piston near the second oil port has a buffer plug;

[0007] A first end cap is connected to the end of the cylinder body near the first oil port;

[0008] The second end cap is connected to the end of the cylinder body near the second oil port. The second end cap includes a buffer portion and a connecting portion connected to the cylinder body. The buffer portion has a plug hole for accommodating the buffer plug and an oil passage connecting the plug hole and the second oil port. The buffer portion also has an annular groove surrounding its side wall and communicating with the oil passage. There is a buffer gap between the buffer portion and the inner wall of the chamber. The chamber communicates with the annular groove through the buffer gap.

[0009] Furthermore, the piston includes a rod and a connecting assembly connected to one end of the rod near the second end cap. The connecting assembly is provided with a magnetic ring, and the outer wall of the cylinder is provided with a sensing groove for accommodating the induction coil.

[0010] Furthermore, the connecting assembly includes a first connector threadedly connected to the rod and a second connector sleeved on the rod. The first connector has a protrusion, and the magnetic ring is sleeved on the protrusion. The second connector has a recess into which the protrusion can be inserted, the depth of the recess being less than the length of the protrusion. The second connector presses against the first connector.

[0011] Furthermore, a first sealing ring is provided between the first end cap and the cylinder body, and a second sealing ring is provided between the second end cap and the cylinder body, the second sealing ring being located on the side of the annular groove facing the connecting portion.

[0012] Furthermore, a third sealing ring is provided inside the plug hole, so that when the buffer plug enters the plug hole, the third sealing ring can contact the outer surface of the buffer plug to form a sealing structure.

[0013] Furthermore, the first connector has a wear-resistant ring that contacts the inner wall of the chamber; the second connector also has a Gladley ring that contacts the inner wall of the chamber; and a fourth sealing ring is also provided between the rod and the second connector.

[0014] Furthermore, the inner wall of the first end cap is also provided with a shaft seal and a step seal that can contact the rod portion.

[0015] Furthermore, a locking screw is provided between the first connector and the rod portion, which is arranged axially along the rod portion.

[0016] Furthermore, neither the first oil port nor the second oil port is connected to a throttle valve.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention provides a buffer plug at one end of the piston and a slow-release flow channel consisting of a plug hole, an oil passage, a buffer gap, and an annular groove inside the second end cover. This allows the piston to achieve a buffering effect by slowly releasing hydraulic oil when it approaches the end of its stroke, effectively reducing the impact of the piston on the second end cover. Attached Figure Description

[0019] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances. In the drawings:

[0020] Figure 1 This is a schematic diagram of the structure of the novel rear buffer sensing cylinder described in this utility model;

[0021] Figure 2 This is a schematic diagram of the hydraulic oil flow of the novel rear buffer sensing cylinder described in this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the second end cap described in this utility model;

[0023] Figure 4 This is a cross-sectional view of the cylinder body of the present invention, perpendicular to the axial direction.

[0024] Figure 5 This is a schematic diagram of the first connecting member described in this utility model;

[0025] Figure 6 This is a schematic diagram of the second connector described in this utility model.

[0026] In the diagram: 1. Cylinder block; 11. Chamber; 12. First oil port; 13. Second oil port; 14. First end cover; 141. First sealing ring; 142. Shaft seal; 143. Step seal; 15. Second end cover; 151. Buffer section; 1511. Plug hole; 1512. Oil passage; 1513. Annular groove; 1514. Buffer gap; 152. Connecting part; 153. Second sealing ring; 154. Third sealing ring; 16. Sensing groove; 2. Piston; 21. Buffer plug; 22. Rod part; 221. Fourth sealing ring; 23. First connecting piece; 231. Protrusion; 232. Wear ring; 24. Second connecting piece; 241. Recess; 242. Glyd ring; 25. Magnetic ring. Detailed Implementation

[0027] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0028] In the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The implementation methods of this utility model will now be described based on its overall structure.

[0029] like Figures 1 to 6As shown, this utility model discloses a novel rear buffer sensing cylinder, comprising:

[0030] The cylinder body 1 has a chamber 11 extending through it along its length, and the side walls at both ends of the cylinder body 1 are provided with a first oil port 12 and a second oil port 13 that can communicate with the chamber 11.

[0031] Piston 2, the end of piston 2 near the second oil port 13 has a buffer plug 21;

[0032] The first end cap 14 is connected to the end of the cylinder 1 near the first oil port 12;

[0033] The second end cap 15 is connected to one end of the cylinder body 1 near the second oil port 13. The second end cap 15 includes a buffer portion 151 and a connecting portion 152 connected to the cylinder body 1. The buffer portion 151 has a plug hole 1511 for accommodating the buffer plug 21 and an oil passage 1512 connecting the plug hole 1511 and the second oil port 13. The second end cap 15 also has an annular groove 1513 surrounding its sidewall and communicating with the oil passage 1512. There is a buffer gap 1514 between the connecting portion 152 and the inner wall of the chamber 11. The chamber 11 communicates with the annular groove 1513 through the buffer gap 1514.

[0034] With the above structure, when the extended piston 2 is retracted and resets, after the buffer plug 21 at the end of the piston 2 near the second oil port 13 enters the plug hole 1511, the hydraulic oil between the piston 2 and the second end cover 15 cannot be discharged from the plug hole 1511 through the oil passage 1512 and then discharged from the second oil port 13. Therefore, the remaining hydraulic oil is difficult to be discharged from the chamber 11 quickly, thus playing a buffering role in the resetting process of the piston 2 and preventing the piston 2 from hitting the second end cover 15, which may cause damage to the oil cylinder.

[0035] Specifically, hydraulic oil that cannot be discharged from the plug hole 1511 flows into the annular groove 1513 that can communicate with the oil passage 1512 through the buffer gap 1514 between the buffer part 151 of the second end cover 15 and the chamber 11, thereby forming a hydraulic oil slow release channel. The hydraulic oil is slowly discharged from the chamber 11 to the second oil port 13. The speed of hydraulic oil discharge is reduced, thus playing the role of buffer piston 2.

[0036] Furthermore, the piston 2 includes a rod 22 and a connecting assembly connected to the rod 22 near the second end cap 15. A magnetic ring 25 is provided on the connecting assembly to generate an induced magnetic field signal during the reciprocating motion of the piston 2. Correspondingly, the outer wall of the cylinder 1 is provided with an induction groove 16 for accommodating the induction coil, allowing the induction coil to be positioned close to the cylinder 1. This, in conjunction with the magnetic ring 25, enables real-time monitoring of the piston 2's position changes, accurately determining the piston 2's position within the chamber 11.

[0037] Specifically, the connecting assembly includes a first connecting member 23 threadedly connected to the rod portion 22 of the piston 2 and a second connecting member 24 sleeved on the rod portion 22. The first connecting member 23 has a protrusion 231, on which the magnetic ring 25 is securely sleeved to ensure that it is not easily displaced during operation. Correspondingly, the second connecting member 24 has a recess 241 that mates with the protrusion 231. The depth of the recess 241 is less than the length of the protrusion 231, so that after the protrusion 231 is inserted into the recess 241, the first connecting member 23 and the second connecting member 24 can be pressed tightly together. The magnetic ring 25 is located between the first connecting member 23 and the second connecting member 24 to prevent axial movement.

[0038] Preferably, a first sealing ring 141 is provided between the first end cover 14 and the cylinder body 1, and a second sealing ring 153 is provided between the second end cover 15 and the cylinder body 1, thereby achieving effective sealing of the end connection of the hydraulic cylinder. The first sealing ring 141 is fitted onto the first end cover 14 to ensure that hydraulic oil does not leak at the connection between the first end cover 14 and the cylinder body 1; the second sealing ring 153 is fitted onto the second end cover 15, and the second sealing ring 153 is located on the side of the annular groove 1513 facing the connection portion 152, thereby preventing hydraulic oil from further seeping out from the connection between the second end cover 15 and the cylinder body 1 through the annular groove 1513 during the piston 2 buffering process.

[0039] Furthermore, a third sealing ring 154 is also provided inside the plug hole 1511. When the piston 2 retracts to the end of its stroke, the buffer plug 21 enters the plug hole 1511 with the third sealing ring 154. The third sealing ring 154 is in close contact with the outer surface of the buffer plug 21, forming an effective sealing structure. At this time, the hydraulic oil remaining in the chamber 11 cannot be discharged to the second oil port 13 through the plug hole 1511. The hydraulic oil in the chamber 11 can only be slowly discharged from the buffer gap 1514 to the second oil port 13, thereby achieving the buffering effect of the piston 2 and making the buffering process more gentle and stable.

[0040] The first connecting member 23 is provided with a wear-resistant ring 232 that contacts the inner wall of the chamber 11. The wear-resistant ring 232 prevents excessive wear of the piston 2 during movement, extending the service life of the cylinder and the piston 2. The second connecting member 24 is provided with a Glyd ring 242 that contacts the inner wall of the chamber 11. The Glyd ring 242 provides excellent sealing performance and also has good high pressure resistance and wear resistance, thus ensuring that hydraulic oil does not leak during the reciprocating motion of the piston 2. A fourth sealing ring 221 is also provided between the rod 22 and the second connecting member 24 to prevent oil leakage between the piston 2 and the second connecting member 24 from causing the first connecting member 23 and the second connecting member 24 to separate, the magnetic ring 25 to fall off, and affecting the normal movement of the piston 2. A shaft seal 142 and a step seal 143 are also provided on the inner wall of the first end cover 14 to enhance the sealing effect between the rod 22 of the piston 2 and the first end cover 14. The shaft seal 142 is mainly used to seal the reciprocating rod 22 to prevent hydraulic oil from leaking outward along the rod 22. At the same time, the shaft seal 142 has good wear resistance and pressure resistance. The step seal 143 can maintain a stable sealing state under high pressure and frequent piston movement.

[0041] Furthermore, to prevent loosening of the connection between the first connecting member 23 and the rod 22, a locking screw is provided between the first connecting member 23 and the rod 22, installed axially along the rod 22, thereby improving the stability and anti-loosening ability of the connection. The locking screw provides additional axial locking on top of the threaded connection between the first connecting member 23 and the rod 22, preventing the first connecting member 23 from rotating or loosening during the high-frequency reciprocating motion of the piston 2, ensuring that the magnetic ring 25 and other related components always remain in the accurate working position.

[0042] In traditional hydraulic cylinders, to prevent the piston 2 from violently impacting the cylinder body 1, a throttle valve is usually connected to the first oil port 12 and the second oil port 13. By slowing down the flow rate of hydraulic oil out of the cylinder body 1, the hydraulic oil remaining in the cylinder body 1 can buffer the piston 2. In this invention, neither the first oil port 12 nor the second oil port 13 is connected to a throttle valve. Instead, the hydraulic oil is guided out of the second oil port 13 through a slow-release flow channel composed of a buffer gap 1514, an annular groove 1513, and an oil passage 1512 on the second end cover. Since the buffer gap 1514 provides a narrow channel for hydraulic oil to exit, the speed of the hydraulic oil flowing out of the buffer gap 1514 can be naturally slowed down, thereby achieving the purpose of buffering the piston 2.

[0043] The technical solution of this utility model has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A novel rear buffer sensing cylinder, characterized in that, include: A cylinder body having a chamber extending through its length, and a first oil port and a second oil port communicating with the chamber are provided on the side walls at both ends of the cylinder body; Piston, wherein the end of the piston near the second oil port has a buffer plug; A first end cap is connected to the end of the cylinder body near the first oil port; The second end cap is connected to the end of the cylinder body near the second oil port. The second end cap includes a buffer portion and a connecting portion connected to the cylinder body. The buffer portion has a plug hole for accommodating the buffer plug and an oil passage connecting the plug hole and the second oil port. The buffer portion also has an annular groove surrounding its side wall and communicating with the oil passage. There is a buffer gap between the buffer portion and the inner wall of the chamber. The chamber communicates with the annular groove through the buffer gap.

2. The novel rear buffer sensing cylinder according to claim 1, characterized in that, The piston includes a rod and a connecting assembly connected to one end of the rod near the second end cap. The connecting assembly is provided with a magnetic ring, and the outer wall of the cylinder is provided with a sensing groove for accommodating the induction coil.

3. The novel rear buffer sensing cylinder according to claim 2, characterized in that, The connecting assembly includes a first connector threaded to the rod and a second connector sleeved on the rod. The first connector has a protrusion, and the magnetic ring is sleeved on the protrusion. The second connector has a recess into which the protrusion can be inserted, and the depth of the recess is less than the length of the protrusion. The second connector presses against the first connector.

4. The novel rear buffer sensing cylinder according to claim 1, characterized in that, A first sealing ring is fitted on the first end cap and the cylinder body, and a second sealing ring is fitted on the second end cap and the cylinder body. The second sealing ring is located on the side of the annular groove facing the connecting part.

5. The novel rear buffer sensing cylinder according to claim 1, characterized in that, A third sealing ring is provided inside the plug hole, so that when the buffer plug enters the plug hole, the third sealing ring can contact the outer surface of the buffer plug to form a sealing structure.

6. The novel rear buffer sensing cylinder according to claim 3, characterized in that, The first connector has a wear-resistant ring that contacts the inner wall of the chamber; the second connector also has a Gladwell ring that contacts the inner wall of the chamber; and a fourth sealing ring is also provided between the rod and the second connector.

7. The novel rear buffer sensing cylinder according to claim 2, characterized in that, The inner wall of the first end cap is also provided with a shaft seal and a step seal that can contact the rod.

8. The novel rear buffer sensing cylinder according to claim 3, characterized in that, The first connector is further provided with a stop screw that is arranged along the axial direction of the rod.

9. The novel rear buffer sensing cylinder according to claim 1, characterized in that, Neither the first oil port nor the second oil port is connected to a throttle valve.

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