Hydraulic cylinder with cylinder barrel protection structure

Abstract

The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a hydraulic cylinder with a cylinder barrel protection structure, which comprises a cylinder bottom flange, a guide sleeve, a cylinder barrel, a piston rod and a piston, the cylinder bottom flange and the guide sleeve are enclosed to form a protection wall, an accommodating cavity is formed in the cylinder bottom flange and the guide sleeve, and the cylinder barrel is fixedly arranged in the accommodating cavity; at least part of the piston rod is arranged in the cylinder barrel and can axially slide relative to the cylinder barrel, one end of the piston rod is sleeved with the piston, the end, sleeved with the piston, of the piston rod is arranged in the cylinder barrel, and the other end of the piston rod penetrates out of the guide sleeve. According to the hydraulic cylinder with the cylinder barrel protection structure, the protection structure is arranged on the outer wall of the cylinder barrel, collision of the outer wall of the cylinder barrel is reduced, and when the cylinder barrel is damaged, the cylinder barrel can be rapidly disassembled and replaced without scrapping the whole oil cylinder.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic cylinders, and particularly relates to a hydraulic cylinder with a cylinder barrel protection structure. Background Art

[0002] A hydraulic cylinder is a common hydraulic transmission device, which has the advantages of simple structure, convenient operation, reliable work, etc., and is widely used in various industrial fields. The hydraulic cylinder mainly consists of components such as a cylinder barrel, a piston, and a piston rod, and works through the hydraulic principle.

[0003] When the hydraulic cylinder is in use, the outer wall of the cylinder barrel is prone to being knocked and bumped, affecting the appearance and performance, and the inner wall of the cylinder barrel is prone to wear. Specifically, the inner wall of the cylinder barrel and the piston are in clearance fit, and the piston reciprocates back and forth with the oil under the action of oil pressure. If the cleanliness of the oil is not high, the impurities in the oil are extremely easy to adhere to the gap between the piston and the inner wall of the cylinder barrel. With the reciprocating movement of the piston, the inner wall of the cylinder barrel is continuously worn, resulting in scratches on the inner wall of the cylinder barrel. Frequent reciprocating movements will exacerbate the damage to the cylinder barrel, causing cylinder pulling, resulting in internal leakage or abnormal noise in the hydraulic cylinder.

[0004] However, in the existing hydraulic cylinders, the cylinder barrel and the cylinder bottom are integrally welded. When the outer wall or the inner wall of the cylinder barrel is damaged, the whole hydraulic cylinder needs to be scrapped, resulting in waste of the hydraulic cylinder. Content of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic cylinder with a cylinder barrel protection structure to solve the technical problems that the outer wall of the cylinder barrel is knocked and bumped, and when the cylinder barrel is damaged, the whole hydraulic cylinder needs to be scrapped.

[0006] To solve the above technical problems, the utility model provides a hydraulic cylinder with a cylinder barrel protection structure. A protection structure is arranged on the outer wall of the cylinder barrel to reduce the knocking and bumping of the outer wall of the cylinder barrel. When the cylinder barrel is damaged, the cylinder barrel can be quickly disassembled and replaced without scrapping the whole oil cylinder.

[0007] The hydraulic cylinder with a cylinder barrel protection structure of the utility model includes: a cylinder bottom flange, a guide sleeve, a cylinder barrel, a piston rod, and a piston. The cylinder bottom flange and the guide sleeve enclose to form a protection wall, and an accommodation cavity is formed inside the cylinder bottom flange and the guide sleeve. The cylinder barrel is fixedly arranged in the accommodation cavity;

[0008] At least part of the piston rod is arranged in the cylinder barrel and can axially slide relative to the cylinder barrel. Among them, the piston is sleeved on one end of the piston rod, the end of the piston rod with the piston sleeved is arranged in the cylinder barrel, and the other end of the piston rod passes through the guide sleeve.

[0009] Further, for the convenience of installation, a flange plate is provided between the cylinder bottom flange and the guide sleeve, and the cylinder bottom flange, the flange plate and the guide sleeve are fixedly connected by screws.

[0010] Further, the inner walls of the cylinder bottom flange, the flange plate and the guide sleeve are all arranged in clearance fit with the outer wall of the cylinder barrel.

[0011] Further, let the end of the piston rod passing through the guide sleeve be the front end. Sealing rings are respectively arranged on the outer wall of the cylinder barrel and on the front and rear sides of the flange plate, which can prevent the oil from leaking from the connection between the cylinder bottom flange and the guide sleeve.

[0012] For the convenience of installing the cylinder barrel, the guide sleeve is an annular structure with three stepped surfaces inside. From front to back, they are the first stepped surface, the second stepped surface and the third stepped surface. The rear end face of the cylinder barrel abuts against the end face of the cylinder bottom flange, and the front end face of the cylinder barrel abuts against the third stepped surface of the guide sleeve.

[0013] For the convenience of fixing the cylinder barrel, a limit ring is arranged between the second stepped surface and the third stepped surface of the guide sleeve.

[0014] Further, a first chamber is formed among the end face of the cylinder bottom flange, the rear end face of the piston and the inner wall of the cylinder barrel, and a second chamber is formed among the front end face of the piston, the end face of the guide sleeve, the inner wall of the cylinder barrel and the outer wall of the piston rod.

[0015] Further, a first liquid inlet / outlet is provided on the cylinder bottom flange, and a second liquid inlet / outlet is provided on the guide sleeve. The first liquid inlet / outlet communicates with the first chamber, and the second liquid inlet / outlet communicates with the second chamber.

[0016] Further, the second liquid inlet / outlet penetrates through the limit ring to communicate with the second chamber.

[0017] To prevent oil leakage, oil plugs are respectively provided on the first liquid inlet / outlet and the second liquid inlet / outlet.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The hydraulic cylinder with a cylinder barrel protection structure of the present utility model effectively reduces the technical problems that the outer wall of the cylinder barrel is affected by collision deformation, which affects the appearance and performance, by arranging a protection wall on the outer wall of the cylinder barrel. Specifically, the protection wall is formed by the cooperation of the cylinder bottom flange and the guide sleeve. While the cylinder bottom flange and the guide sleeve can play their original roles, they can also protect the outer wall of the cylinder barrel. The structure is ingenious and easy to implement;

[0020] The bottom flange of the cylinder and the guide sleeve are detachably connected. The cylinder barrel is sleeved inside the bottom flange of the cylinder and the guide sleeve. When the cylinder barrel is damaged, the bottom flange of the cylinder and the guide sleeve can be disassembled, and the cylinder barrel can be taken out for replacement, without scrapping the whole hydraulic cylinder, saving resources. The hydraulic cylinder with a cylinder barrel protection structure of the present utility model also has the advantages of simple, compact overall structure and high utilization rate.

[0021] In order to make the above-mentioned objects, features and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes a detailed description as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 Schematic diagram of the hydraulic cylinder with a cylinder barrel protection structure of the present utility model;

[0024] Figure 2 Schematic diagram of the structure of the guide sleeve of the present utility model.

[0025] In the figure:

[0026] 1. Bottom flange of the cylinder; 11. First liquid inlet / outlet; 2. Guide sleeve; 21. First step surface; 22. Second step surface; 23. Third step surface; 24. Second liquid inlet / outlet; 3. Cylinder barrel; 31. Sealing ring; 4. Piston rod; 5. Piston; 6. Flange plate; 7. Screw; 8. Limit ring; 9. Oil plug. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0027] In order to make the objects, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions of the present utility model in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present utility model belong to the scope of protection of the present utility model.

[0028] As Figure 1 and Figure 2 shown, the present utility model provides a hydraulic cylinder with a cylinder barrel protection structure, including: a bottom flange 1 of the cylinder, a guide sleeve 2, a cylinder barrel 3, a piston rod 4 and a piston 5.

[0029] The bottom flange 1 of the cylinder and the guide sleeve 2 enclose to form a protective wall. An accommodation cavity is formed inside the bottom flange 1 of the cylinder and the guide sleeve 2. The cylinder barrel 3 is fixedly arranged in the accommodation cavity. At least part of the piston rod 4 is arranged in the cylinder barrel 3 and can axially slide relative to the cylinder barrel 3. Among them, the piston 5 is sleeved on one end of the piston rod 4. The end of the piston rod 4 sleeved with the piston 5 is arranged in the cylinder barrel 3, and the other end of the piston rod 4 passes through the guide sleeve 2.

[0030] By arranging a protective wall on the outer wall of the cylinder barrel 3, the technical problem that the outer wall of the cylinder barrel 3 is collided and deformed, thereby affecting the appearance and performance, is effectively reduced. The protective wall is formed by the cooperation of the bottom flange 1 of the cylinder and the guide sleeve 2. While the bottom flange 1 of the cylinder and the guide sleeve 2 can play their original roles, they can also protect the outer wall of the cylinder barrel 3. The structure is ingenious and easy to implement.

[0031] A flange plate 6 is arranged between the bottom flange 1 of the cylinder and the guide sleeve 2. The bottom flange 1 of the cylinder, the flange plate 6 and the guide sleeve 2 are fixedly connected by screws 7. The bottom flange 1 of the cylinder and the guide sleeve 2 are detachably connected. The cylinder barrel 3 is sleeved inside the bottom flange 1 of the cylinder and the guide sleeve 2. When the cylinder barrel 3 is damaged, the bottom flange 1 of the cylinder and the guide sleeve 2 can be disassembled, and the cylinder barrel 3 can be taken out for replacement, without scrapping the whole oil cylinder, saving resources.

[0032] In order to facilitate the setting of the cylinder barrel 3, the inner walls of the bottom flange 1 of the cylinder, the flange plate 6 and the guide sleeve 2 are all arranged in clearance fit with the outer wall of the cylinder barrel 3.

[0033] Let the end of the piston rod 4 passing through the guide sleeve 2 be the front end. Sealing rings 31 are respectively arranged on the front and rear sides of the flange plate 6 on the outer wall of the cylinder barrel 3, which can prevent the oil from leaking from the connection between the bottom flange 1 of the cylinder and the guide sleeve 2.

[0034] The guide sleeve 2 is an annular structure with three stepped surfaces inside. From front to back, they are the first stepped surface 21, the second stepped surface 22 and the third stepped surface 23 in sequence. The rear end face of the cylinder barrel 3 abuts against the end face of the bottom flange 1 of the cylinder, and the front end face of the cylinder barrel 3 abuts against the third stepped surface 23 of the guide sleeve 2. A limit ring 8 is arranged between the second stepped surface 22 and the third stepped surface 23 of the guide sleeve 2. Part of the cylinder barrel 3 abuts against the limit ring 8. The piston 5 reciprocates in the cylinder barrel 3 along with the piston rod 4 under the action of the oil, moving from the end face of the bottom flange 1 to the limit ring 8. By setting three stepped surfaces, the cylinder barrel 3 abuts against the third stepped surface 23 and the limit ring 8, and the limit ring 8 is arranged between the second stepped surface 22 and the third stepped surface 23, making the overall structure compact and the design reasonable.

[0035] A first chamber is formed between the end face of the cylinder bottom flange 1, the rear end face of the piston 5, and the inner wall of the cylinder barrel 3. A second chamber is formed between the front end face of the piston 5, the end face of the guide sleeve 2, the inner wall of the cylinder barrel 3, and the outer wall of the piston rod 4. The cylinder bottom flange 1 is provided with a first liquid inlet / outlet 11, and the guide sleeve 2 is provided with a second liquid inlet / outlet 24. The first liquid inlet / outlet 11 communicates with the first chamber, and the second liquid inlet / outlet 24 communicates with the second chamber. The second liquid inlet / outlet 24 penetrates through the limit ring 8 and communicates with the second chamber.

[0036] When the first liquid inlet / outlet 11 intakes liquid, the oil enters the first chamber and pushes the piston 5 to move from the rear to the front. When the second liquid inlet / outlet 24 intakes liquid, the oil enters the second chamber and pushes the piston 5 to move from the front to the rear, realizing the reciprocating motion of the piston rod 4.

[0037] In order to prevent oil leakage, oil plugs 9 are respectively provided on the first liquid inlet / outlet 11 and the second liquid inlet / outlet 24.

[0038] The hydraulic cylinder with a cylinder barrel protection structure of the present utility model effectively reduces the technical problems that the appearance and performance of the outer wall of the cylinder barrel are affected by collision deformation by arranging a protection wall on the outer wall of the cylinder barrel. Specifically, the protection wall is formed by the cooperation of the cylinder bottom flange and the guide sleeve. While the cylinder bottom flange and the guide sleeve can perform their original functions, they can also protect the outer wall of the cylinder barrel. The structure is ingenious and easy to implement.

[0039] The cylinder bottom flange and the guide sleeve are detachably connected, and the cylinder barrel is sleeved inside the cylinder bottom flange and the guide sleeve. When the cylinder barrel is damaged, the cylinder bottom flange and the guide sleeve can be disassembled, and the cylinder barrel can be taken out for replacement without scrapping the entire oil cylinder, saving resources. The hydraulic cylinder with a cylinder barrel protection structure of the present utility model also has the advantages of simple, compact overall structure and high utilization rate.

[0040] All the components selected in this application are common standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or obtained through conventional experimental methods.

[0041] In the description of the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0042] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] Taking the above-mentioned ideal embodiments of the present utility model as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A hydraulic cylinder with a cylinder protection structure, characterized in that Comprising: A cylinder bottom flange (1), a guide sleeve (2), a cylinder barrel (3), a piston rod (4), and a piston (5). The cylinder bottom flange (1) and the guide sleeve (2) enclose to form a protective wall, and an accommodation cavity is formed inside the cylinder bottom flange (1) and the guide sleeve (2). The cylinder barrel (3) is fixedly arranged in the accommodation cavity; At least a part of the piston rod (4) is arranged inside the cylinder barrel (3) and can axially slide relative to the cylinder barrel (3). Wherein, the piston (5) is sleeved on one end of the piston rod (4), and the end of the piston rod (4) sleeved with the piston (5) is arranged inside the cylinder barrel (3), and the other end of the piston rod (4) passes through the guide sleeve (2).

2. The hydraulic cylinder with a cylinder protection structure according to claim 1, characterized in that, A flange plate (6) is arranged between the cylinder bottom flange (1) and the guide sleeve (2), and the cylinder bottom flange (1), the flange plate (6), and the guide sleeve (2) are fixedly connected by screws (7).

3. The hydraulic cylinder with a cylinder protection structure according to claim 2, wherein, The inner walls of the cylinder bottom flange (1), the flange plate (6), and the guide sleeve (2) are all arranged in clearance fit with the outer wall of the cylinder barrel (3).

4. The hydraulic cylinder with a cylinder protection structure according to claim 3, characterized in that, Let the end of the piston rod (4) passing through the guide sleeve (2) be the front end. Sealing rings (31) are respectively arranged on the outer wall of the cylinder barrel (3) and on the front and rear sides of the flange plate (6).

5. The hydraulic cylinder with a cylinder protection structure according to claim 1, characterized in that, The guide sleeve (2) is an annular structure with three stepped surfaces inside. From front to back, they are the first stepped surface (21), the second stepped surface (22), and the third stepped surface (23). The rear end face of the cylinder barrel (3) abuts against the end face of the cylinder bottom flange (1), and the front end face of the cylinder barrel (3) abuts against the third stepped surface (23) of the guide sleeve (2).

6. The hydraulic cylinder with a cylinder protection structure according to claim 5, characterized in that, A limit ring (8) is arranged between the second stepped surface (22) and the third stepped surface (23) of the guide sleeve (2).

7. The hydraulic cylinder with a cylinder protection structure according to claim 6, characterized in that, A first chamber is formed between the end face of the cylinder bottom flange (1), the rear end face of the piston (5), and the inner wall of the cylinder barrel (3). A second chamber is formed between the front end face of the piston (5), the end face of the guide sleeve (2), the inner wall of the cylinder barrel (3), and the outer wall of the piston rod (4).

8. The hydraulic cylinder with a cylinder protection structure according to claim 7, characterized in that, A first liquid inlet / outlet (11) is arranged on the cylinder bottom flange (1), and a second liquid inlet / outlet (24) is arranged on the guide sleeve (2). The first liquid inlet / outlet (11) communicates with the first chamber, and the second liquid inlet / outlet (24) communicates with the second chamber.

9. The hydraulic cylinder with a cylinder protection structure according to claim 8, characterized in that, The second liquid inlet / outlet (24) penetrates through the limit ring (8) to communicate with the second chamber.

10. The hydraulic cylinder with a cylinder protection structure according to claim 8, characterized in that, Oil plugs (9) are respectively arranged on the first liquid inlet / outlet (11) and the second liquid inlet / outlet (24).

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