Buffering structure of hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, in particular to a hydraulic oil cylinder buffering structure which comprises a cylinder barrel, a second oil port and a first oil port are fixedly connected to the left side and the right side of the circumferential face of the upper end of the cylinder barrel respectively, a cylinder bottom is fixedly connected to the left inner side wall of the cylinder barrel, and a guide sleeve is fixedly connected to the right inner side wall of the cylinder barrel. A piston rod is slidably connected into the guide sleeve, a piston head is fixedly connected to the left end of the piston rod, a buffer part is arranged at the left end of the piston head, one end of a spring is fixedly connected with the piston head, the other end of the spring is fixedly connected with the circular plate, and an oil passing hole is formed in a buffer column. And the cavity is communicated with the annular groove. Under the action of the buffer piece, the hydraulic oil cylinder can be buffered and protected, the probability of collision of different degrees when the piston head reaches the terminal of the cylinder barrel is reduced, and the hydraulic oil cylinder can stably work for a long time.

Description

Technical Field

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

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The hydraulic cylinder realizes reciprocating motion. The structural types of hydraulic cylinders are piston cylinders, plunger cylinders, and swing cylinders. The piston cylinder and plunger cylinder realize reciprocating linear motion, output speed and thrust, and the swing cylinder realizes reciprocating swing, output angular velocity (speed) and torque. In addition to being used individually, hydraulic cylinders can also be combined in two or more or in combination with other mechanisms to complete special functions. The hydraulic cylinder has a simple structure and reliable operation, and has been widely used in the hydraulic system of machine tools.

[0003] At present, the hydraulic cylinders used in the machinery industry use the combustion of gasoline to drive the cylinder operation. The amount of oil injection will increase, resulting in the thrust being too fast in an instant. For the cylinders without buffering function, when the piston quickly reaches the terminal of the cylinder, collisions of varying degrees will occur, which will cause certain damage to the cylinder and seriously affect the stability of the hydraulic cylinder. Therefore, it is necessary to design a hydraulic cylinder buffer structure. Summary of the invention

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a hydraulic oil cylinder buffer structure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a hydraulic cylinder buffer structure, including a cylinder barrel, the left and right sides of the circumferential surface of the upper end of the cylinder barrel are respectively fixedly connected with a second oil port and a first oil port, the left inner wall of the cylinder barrel is fixedly connected with a cylinder bottom, the right inner wall of the cylinder barrel is fixedly connected with a guide sleeve, the inside of the guide sleeve is slidably connected with a piston rod, the left end of the piston rod is fixedly connected with a piston head, and the piston head is located in the cylinder barrel and slidably connected with the cylinder barrel, the left end of the piston head is provided with a buffer, and the buffer includes A buffer column, a spring, a circular plate, a convex ring, a notch, a circular plate and an oil hole, the left end of the piston head is fixedly connected with the buffer column and the convex ring, and the buffer column is located in the convex ring, the left end face of the convex ring is provided with a notch, the circumferential surface of the buffer column is slidably connected with the circular plate, the circumferential surface of the buffer column is sleeved with a spring, one end of the spring is fixedly connected to the piston head, and the other end of the spring is fixedly connected to the circular plate, an oil hole is provided inside the buffer column, the right end face of the cylinder bottom is provided with an annular groove and a cavity, and the cavity and the annular groove are connected to each other.

[0006] Furthermore, the end surface of the oil hole is L-shaped, and the oil hole is arranged along the axial direction of the buffer column.

[0007] Furthermore, the extension line of the central axis of the buffer column coincides with the central axis of the cavity, the shape of the annular groove is the same as that of the circular plate, and the annular groove matches the circular plate.

[0008] Furthermore, the ends of the piston rod and the cylinder bottom that are away from each other are fixedly connected with connecting heads.

[0009] Furthermore, the convex ring is made of silicon-aluminum alloy material.

[0010] Furthermore, the diameter of the convex ring is the same as the diameter of the piston head, and an outer sealing ring is fixedly mounted on the outer circumferential surface of the piston head and the convex ring.

[0011] The utility model has the following beneficial effects:

[0012] Compared with the prior art, this hydraulic cylinder buffer structure can provide buffering protection for the hydraulic cylinder under the action of the buffer member, thereby reducing the probability of different degrees of collision of the piston head when reaching the cylinder terminal. Specifically, before the piston head reaches the cylinder terminal, the circular plate will enter the annular groove, the buffer column will enter the cavity, and at the same time the spring will be compressed. The buffering force generated by the spring can provide the first layer of buffering protection for the piston. At the same time, the oil located inside the cavity passes through the oil hole and is discharged from the second oil port along the notch. At this time, the flow rate of the oil discharged outward becomes smaller, and the piston movement slows down to achieve the second layer of buffering function. Through the double-layer buffering operation, the entire hydraulic cylinder can be provided with double protection, so that the hydraulic cylinder can operate stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structure after the first main view section of the utility model;

[0015] Figure 3 for Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0016] Figure 4 It is a schematic diagram of the structure after the second main view section of the utility model;

[0017] Figure 5 for Figure 4 Schematic diagram of the enlarged structure of B;

[0018] Figure 6 It is a structural schematic diagram of the piston head and the buffer member in the utility model.

[0019] Legend:

[0020] 1. Cylinder barrel; 2. Guide sleeve; 3. Piston rod; 4. First oil port; 5. Second oil port; 6. Cylinder bottom; 7. Buffer column; 8. Oil hole; 9. Notch; 10. Convex ring; 11. Spring; 12. Round plate; 13. Piston head; 14. Cavity; 15. Annular groove. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] Reference Figure 1-6 The utility model provides a hydraulic cylinder buffer structure, including a cylinder barrel 1, the left and right sides of the upper circumferential surface of the cylinder barrel 1 are respectively fixedly connected with a second oil port 5 and a first oil port 4, the left inner wall of the cylinder barrel 1 is fixedly connected with a cylinder bottom 6, the right inner wall of the cylinder barrel 1 is fixedly connected with a guide sleeve 2, the inside of the guide sleeve 2 is slidably connected with a piston rod 3, the left end of the piston rod 3 is fixedly connected with a piston head 13, and the piston head 13 is located in the cylinder barrel 1 and is slidably connected to the cylinder barrel 1, and a buffer is arranged at the left end of the piston head 13, and the buffer includes a buffer column 7, a spring 11, a circular plate 12, a convex ring 10, a notch 9, a circular plate 12 and an oil hole 8, and the left end of the piston head 13 is fixedly connected with a buffer The buffer column 7 and the convex ring 10 are provided, and the buffer column 7 is located inside the convex ring 10. The left end face of the convex ring 10 is provided with a notch 9. The circumferential surface of the buffer column 7 is slidably connected with a circular plate 12. The circumferential surface of the buffer column 7 is sleeved with a spring 11. One end of the spring 11 is fixedly connected to the piston head 13, and the other end of the spring 11 is fixedly connected to the circular plate 12. The buffer column 7 is provided with an oil hole 8 inside. The right end face of the cylinder bottom 6 is provided with an annular groove 15 and a cavity 14. The cavity 14 and the annular groove 15 are interconnected. The extension line of the central axis of the buffer column 7 coincides with the central axis of the cavity 14. The shape of the annular groove 15 is the same as that of the circular plate 12, and the annular groove 15 is consistent with the circular plate 12. The utility model can play a role of buffering protection for the hydraulic cylinder under the action of the buffer, reduce the probability of different degrees of collision of the piston head 13 when reaching the end of the cylinder barrel 1, and enable the hydraulic cylinder to operate stably for a long time.

[0023] Further, if Figure 3As shown, the end face of the oil hole 8 is L-shaped, and the oil hole 8 is arranged along the axial direction of the buffer column 7. During operation, the inner wall of the cavity 14 is provided with an inner sealing ring (not shown in the figure). When the buffer column 7 enters the cavity 14, the inner sealing ring cooperates with each other so that the oil in the cavity 14 can only enter along the oil hole 8, and finally be discharged from the end of the oil hole 8, and enter the convex ring 10 through the gap of the spring 11, and finally be discharged from the second oil port 5 along the notch 9.

[0024] Further, if Figure 2 As shown, the ends of the piston rod 3 and the cylinder bottom 6 that are away from each other are fixedly connected with a connector. When working, under the action of the connector, the entire hydraulic cylinder is conveniently connected to external equipment.

[0025] Furthermore, the convex ring 10 is made of silicon-aluminum alloy material; the diameter of the convex ring 10 is the same as the diameter of the piston head 13, and the outer circumferential surfaces of the piston head 13 and the convex ring 10 are fixedly mounted with an outer sealing ring. When working, the silicon-aluminum alloy has the characteristics of light weight and excellent corrosion resistance, and also has good thermal stability. The existence of the outer sealing ring ensures that the piston head 13 drives the convex ring 10 to move along the cylinder barrel 1, and the sealing between the cylinder barrel 1 can be ensured.

[0026] The working principle of this utility model:

[0027] When in use, before the piston head 13 reaches the terminal end of the cylinder 1, the circular plate 12 will enter the annular groove 15, the buffer column 7 will enter the cavity 14, and at the same time the spring 11 will be compressed. The buffer force generated by the spring 11 can provide the first layer of buffering protection for the piston. At the same time, the oil inside the cavity 14 passes through the oil hole 8 and is discharged from the second oil port 5 along the notch 9. At this time, the flow rate of the oil discharged outward becomes smaller, and the movement of the piston head 13 becomes slower to achieve the second layer of buffering function. Through the double-layer buffering operation, the entire hydraulic cylinder can be provided with double protection, so that the hydraulic cylinder can operate stably for a long time.

[0028] Finally, it should be noted that the above are only preferred embodiments of the present invention and are 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 can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A hydraulic cylinder buffer structure, comprising a cylinder barrel (1), characterized in that: The left and right sides of the upper circumferential surface of the cylinder barrel (1) are respectively fixedly connected with a second oil port (5) and a first oil port (4); the left inner wall of the cylinder barrel (1) is fixedly connected with a cylinder bottom (6); the right inner wall of the cylinder barrel (1) is fixedly connected with a guide sleeve (2); the interior of the guide sleeve (2) is slidably connected with a piston rod (3); the left end of the piston rod (3) is fixedly connected with a piston head (13); the piston head (13) is located in the cylinder barrel (1) and is slidably connected to the cylinder barrel (1); a buffer is provided at the left end of the piston head (13); the buffer comprises a buffer column (7), a spring (11), a circular plate (12), a convex ring (10), a notch (9), the circular plate (12) and an oil through hole (8 ), the left end of the piston head (13) is fixedly connected to a buffer column (7) and a convex ring (10), and the buffer column (7) is located in the convex ring (10), and the left end surface of the convex ring (10) is provided with a notch (9), the circumferential surface of the buffer column (7) is slidably connected to a circular plate (12), the circumferential surface of the buffer column (7) is sleeved with a spring (11), one end of the spring (11) is fixedly connected to the piston head (13), and the other end of the spring (11) is fixedly connected to the circular plate (12), an oil hole (8) is provided inside the buffer column (7), and the right end surface of the cylinder bottom (6) is provided with an annular groove (15) and a cavity (14), and the cavity (14) and the annular groove (15) are communicated with each other.

2. A hydraulic cylinder buffer structure according to claim 1, characterized in that: The end surface shape of the oil passage hole (8) is L-shaped, and the oil passage hole (8) is arranged along the axial direction of the buffer column (7).

3. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The extension line of the central axis of the buffer column (7) coincides with the central axis of the cavity (14); the shape of the annular groove (15) is the same as that of the circular plate (12), and the annular groove (15) matches the circular plate (12).

4. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The piston rod (3) and the cylinder bottom (6) are both fixedly connected with a connector at ends that are away from each other.

5. The hydraulic cylinder buffer structure according to claim 1, characterized in that: The convex ring (10) is made of silicon-aluminum alloy material.

6. A hydraulic cylinder buffer structure according to claim 5, characterized in that: The diameter of the convex ring (10) is the same as the diameter of the piston head (13), and an outer sealing ring is fixedly mounted on the outer circumferential surfaces of the piston head (13) and the convex ring (10).

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