Hydraulic oil cylinder

Abstract

The utility model provides a hydraulic oil cylinder which comprises a cylinder barrel, a piston and a piston rod. The piston and the piston rod are arranged in the cylinder barrel, the radial outer side circumferential face of the piston makes contact with the radial inner side circumferential face of the cylinder barrel, and the piston and the piston rod are fixed together and can conduct axial linear reciprocating motion in the cylinder barrel together. A connector base is arranged on the radial outer side circumferential face of the cylinder barrel and close to the fixing lug ring, a plurality of oil ports are formed in the connector base, and the buffering effect of the hydraulic oil cylinder is achieved by setting the sizes of the oil ports and the distance between the piston.

Description

Technical Field

[0001] The utility model relates to a hydraulic oil cylinder and belongs to the technical field of hydraulic oil cylinders. Background Art

[0002] The existing patent (patent number 202222988280.4) discloses a throttling buffer structure for an oil cylinder. By setting a throttling buffer device at the piston rod, when the piston rod is extended, the rodless chamber returns oil, and when the piston rod is pushed toward the cylinder head, the throttling rod of the throttling buffer device returns oil, and one end of the throttling rod contacts the cylinder head and compresses the spring to avoid mechanical collision between the piston rod and the cylinder head. The hydraulic oil returns through the throttling rod to relieve the return oil pressure.

[0003] However, the buffer structure of the hydraulic cylinder disclosed above is relatively complex and inconvenient to adjust. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the utility model provides a hydraulic cylinder which solves the buffering problem of the hydraulic cylinder through a simple structure.

[0005] The utility model is implemented according to the following technical solutions:

[0006] The utility model provides a hydraulic cylinder, comprising a cylinder, a piston and a piston rod; the piston and the piston rod are arranged in the cylinder, and the radial outer peripheral surface of the piston contacts the radial inner peripheral surface of the cylinder, the piston and the piston rod are fixed together, and the two can perform axial linear repeated motion together in the cylinder; the radial outer peripheral surface of the cylinder is provided with a joint seat near the fixed earring, and a plurality of oil ports are opened in the joint seat, and the buffering effect of the hydraulic cylinder is achieved by setting the size of the oil ports and the distance between the pistons.

[0007] In some embodiments, two oil ports are opened in the joint seat, namely the main oil port and the buffer oil port; the buffer oil port adjusts its oil port size according to the buffering needs; when the piston enters the buffer zone, the main oil port can completely overlap with the piston, and the hydraulic oil can only return through the buffer oil port, thereby achieving a buffering effect.

[0008] In some embodiments, the transverse cross-section of the connector seat is a circular surface, the main oil port and the buffer oil port are both located on the axial center line of the circular surface, and the main oil port and the buffer oil port are respectively located on both sides of the radial center line of the circular surface.

[0009] In some embodiments, the piston rod and the piston are fixed together by a threaded connection.

[0010] In some embodiments, the cylinder, piston and piston rod are assembled together in a concentric manner.

[0011] In some embodiments, the cylinder is made of cold-drawn tube or seamless steel tube; the piston rod is made of round steel; and the piston is made of round steel or forging.

[0012] In some embodiments, the fixing earring is provided with a circle of protrusions on the radial outer peripheral surface close to the cylinder, and the cylinder is inserted into the fixing earring until it rests against the protrusions, and the two are fixed together by welding at the connection.

[0013] Beneficial effects of the utility model:

[0014] The utility model provides a hydraulic oil cylinder which can effectively play a buffering effect, has a stable and reliable structure, and the buffering effect is convenient to adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings are part of this utility model and are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. Obviously, the drawings described below are only some embodiments. For those of ordinary skill in the art, other drawings can be derived from these drawings without inventive effort.

[0016] In the attached figure:

[0017] Figure 1 This is a cross-sectional view of a hydraulic cylinder of the present utility model;

[0018] Figure 2 This is a top view of a hydraulic cylinder of the present utility model.

[0019] Illustrations: 1. Cylinder; 2. Piston rod; 3. Piston; 4. Fixed earring; 5. Main oil port; 6. Buffer oil port; 7. Connector seat.

[0020] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0023] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0024] like Figure 1 、 Figure 2 As shown, a hydraulic cylinder includes a cylinder barrel 1, a piston 3 and a piston rod 2; the piston 3 and the piston rod 2 are arranged in the cylinder barrel 1, and the radial outer circumference of the piston 3 is in contact with the radial inner circumference of the cylinder barrel 1, the piston 3 and the piston rod 2 are fixed together, and the two can perform axial linear repetitive motion together in the cylinder barrel 1; the radial outer circumference of the cylinder barrel 1 is provided with a joint seat 7 near the fixed earring 4, and a plurality of oil ports are opened in the joint seat 7. By setting the size of the oil port and the distance from the piston 3, the buffering effect of the hydraulic cylinder is achieved.

[0025] For further solutions, please refer to Figure 1 、 Figure 2 As shown, there are two oil ports in the joint seat 7, namely the main oil port 5 and the buffer oil port 6; the buffer oil port 6 adjusts its oil port size according to the buffering needs; when the piston 3 enters the buffer zone, the main oil port 5 can completely overlap with the piston 3, and the hydraulic oil can only return through the buffer oil port 6, thereby achieving a buffering effect.

[0026] For further solutions, please refer to Figure 1 、 Figure 2 As shown, the transverse cross-section of the connector seat 7 is a circular surface, the main oil port 5 and the buffer oil port 6 are both located on the axial center line of the circular surface, and the main oil port 5 and the buffer oil port 6 are respectively located on both sides of the radial center line of the circular surface.

[0027] For further solutions, please refer to Figure 1 、 Figure 2 As shown, the piston rod 2 and the piston 3 are fixed together by a threaded connection.

[0028] For further solutions, please refer to Figure 1、 Figure 2 As shown, the cylinder 1, the piston 3 and the piston rod 2 are assembled together in a coaxial manner.

[0029] For further solutions, please refer to Figure 1 、 Figure 2 As shown, the cylinder 1 is made of cold-drawn tube or seamless steel tube; the piston rod 2 is made of round steel; and the piston 3 is made of round steel or forging.

[0030] For further solutions, please refer to Figure 1 、 Figure 2 As shown, the fixing earring 4 is provided with a circle of protrusions on the radial outer peripheral surface close to the cylinder 1. The cylinder 1 is inserted into the fixing earring 4 until it contacts the protrusions, and the two are fixed together by welding at the connection.

[0031] In summary, the utility model provides a hydraulic cylinder to solve the problem of buffering of the hydraulic cylinder. The whole is mainly composed of a piston, a piston rod, and a cylinder barrel, with a simple structure and adjustable throttling performance. The buffering effect of the hydraulic cylinder is achieved by the size of the oil port of the joint seat on the cylinder barrel and the distance from the piston. Specifically: the main oil port and the buffer oil port are processed at the joint seat position of the cylinder barrel; the size of the buffer oil port is adjusted according to the buffering needs; the position of the main oil port is set to: when the piston enters the buffer zone, the main oil port on the cylinder barrel completely overlaps with the piston, ensuring that the hydraulic oil flows back from the buffer oil port to achieve the buffering effect.

[0032] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0033] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0034] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments using the above-mentioned technical content without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A hydraulic cylinder, characterized in that: including a cylinder, a piston and a piston rod; The piston and the piston rod are arranged in the cylinder, and the radial outer peripheral surface of the piston contacts the radial inner peripheral surface of the cylinder. The piston and the piston rod are fixed together and can perform axial linear reciprocating motion together in the cylinder; The radial outer peripheral surface of the cylinder is provided with a joint seat near the fixed earring, and a plurality of oil ports are opened in the joint seat. The buffering effect of the hydraulic cylinder is achieved by setting the size of the oil ports and the distance between the pistons.

2. The hydraulic cylinder according to claim 1, characterized in that: The connector seat is provided with two oil ports, namely a main oil port and a buffer oil port; The size of the buffer oil port is adjusted according to the buffering needs; When the piston enters the buffer zone, the main oil port can completely overlap with the piston, and the hydraulic oil can only return through the buffer oil port, thereby achieving a buffering effect.

3. The hydraulic cylinder according to claim 2, characterized in that: The transverse cross-section of the joint seat is a circular surface, the main oil port and the buffer oil port are both located on the axial center line of the circular surface, and the main oil port and the buffer oil port are respectively located on both sides of the radial center line of the circular surface.

4. The hydraulic cylinder according to claim 1, characterized in that: The piston rod and the piston are fixed together by a threaded connection.

5. The hydraulic cylinder according to claim 1, characterized in that: The cylinder, the piston and the piston rod are assembled together in a manner of having the same central axis.

6. The hydraulic cylinder according to claim 1, characterized in that: The cylinder is made of cold-drawn tube or seamless steel tube; the piston rod is made of round steel; and the piston is made of round steel or forging.

7. The hydraulic cylinder according to claim 1, characterized in that: The fixing earring is provided with a circle of protrusions on the radial outer peripheral surface close to the cylinder, and the cylinder is sleeved into the fixing earring until it abuts against the protrusions, and the two are fixed together by welding at the connection.

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