Hydraulic cylinder capable of preventing overload liquid leakage

Abstract

The utility model discloses a hydraulic cylinder capable of preventing overload liquid leakage, and relates to the technical field of hydraulic cylinders. Comprising a base; the bottom of the hydraulic device is fixedly connected with the top of the base; the bottom of the limiting device is fixedly connected with the outer wall of the hydraulic device; the bottom of the protection device is fixedly connected with the top of the base; the limiting device comprises a stabilizing rod, the outer wall of the stabilizing rod is slidably connected with the inner wall of the hydraulic device, by arranging the stabilizing block, the stabilizing rod, an indicating block, a fixing block, a dial and other structures, an operator can clearly know the position state of the piston rod in the retraction process of the piston rod, misoperation caused by misjudgment is avoided, and the working efficiency is improved. The situation that liquid leakage is caused by overload of the hydraulic cylinder due to the fact that reverse force is applied when the piston rod does not completely retract is effectively prevented, the operation safety is improved, and the safety accident risk caused by misoperation is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinders, in particular to a hydraulic cylinder which is anti-overload and anti-liquid leakage. Background Art

[0002] Hydraulic cylinders utilize Pascal's principle, which states that pressure changes in a portion of a stationary fluid in a closed container are transmitted without loss to all other parts of the fluid and the container walls. When a hydraulic pump delivers hydraulic oil to one chamber of the cylinder, the liquid pressure acts on the piston, pushing it toward the other chamber. Simultaneously, the piston rod moves with the piston, converting hydraulic energy into mechanical energy, pushing the external load in linear reciprocating motion. Hydraulic cylinders are widely used in various mechanical fields, such as construction machinery, mining machinery, metallurgical equipment, automotive manufacturing, and aerospace. However, improper operation, such as applying a reverse force before the piston rod is fully retracted, can cause the cylinder to bear abnormal loads, resulting in overload and damage. In summary, the present utility model was developed to address the aforementioned issues. Utility Model Content

[0003] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve the technical problems is: a hydraulic cylinder that prevents overload and leakage, comprising: a base; a hydraulic device, the bottom of the hydraulic device is fixedly connected to the top of the base; a limiting device, the bottom of the limiting device is fixedly connected to the outer wall of the hydraulic device; a protective device, the bottom of the protective device is fixedly connected to the top of the base; the limiting device includes a stabilizing rod, the outer wall of the stabilizing rod is slidably connected to the inner wall of the hydraulic device, the top of the stabilizing rod is fixedly connected to a stabilizing block, the bottom of the stabilizing block is fixedly connected to a stabilizing spring, the outer wall of the stabilizing block is fixedly connected to an indicating block, the outer wall of the indicating block is slidably connected to a fixed block, and the outer wall of the fixed block is fixedly connected to a dial.

[0004] Preferably, the hydraulic device includes a hydraulic cylinder, the bottom of which is fixedly connected to the top of the base, and the inner wall of the hydraulic cylinder is slidably connected to a piston rod. By setting structures such as a stabilizing block, a stabilizing rod, an indicator block, a fixed block and a dial, during the retraction of the piston rod, the operator can clearly understand the position status of the piston rod and avoid erroneous operations due to misjudgment.

[0005] Preferably, the stabilizing spring is arranged outside the stabilizing rod, and the bottom of the stabilizing spring is fixedly connected to the top of the hydraulic cylinder.

[0006] Preferably, the protection device includes a protection vertical pole, the bottom of the protection vertical pole is fixedly connected to the top of the base, and the outer wall of the protection vertical pole is fixedly connected to a protection cross bar.

[0007] Preferably, the protective vertical poles are arranged along a circular array of hydraulic cylinders, and the protective vertical poles are fixedly connected to the hydraulic cylinders through connecting rods. The protective device composed of the protective vertical poles, protective cross bars and connecting rods in the external circular array can effectively prevent damage and wear of the hydraulic cylinders by external objects, avoid damage to the hydraulic device, and further reduce potential safety hazards.

[0008] Preferably, the bottom of the fixed block is fixedly connected to the top of the hydraulic cylinder, and the indicating block passes through the fixed block.

[0009] The beneficial effects of the utility model are as follows:

[0010] 1. The utility model provides a limit device, and provides structures such as a stabilizing block, a stabilizing rod, an indicating block, a fixed block and a dial. During the retraction process of the piston rod, the operator can clearly understand the position status of the piston rod, avoiding erroneous operations due to misjudgment, and effectively preventing the hydraulic cylinder from overloading and causing leakage due to the application of reverse force when the piston rod is not fully retracted, thereby improving the safety of operation and reducing the risk of safety accidents caused by improper operation.

[0011] 2. The utility model provides a protective device, which is composed of an external annular array of protective vertical poles, protective horizontal poles and connecting rods. This device can effectively prevent external objects from damaging and wearing the hydraulic cylinder, avoid damage to the hydraulic device, further reduce potential safety hazards, extend the service life of the hydraulic cylinder, reduce the need for frequent repairs and replacements due to damage, and improve the overall reliability and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is the main view of the utility model;

[0013] Figure 2 It is a structural diagram of the hydraulic device of the utility model;

[0014] Figure 3 It is a structural diagram of the limit device of the utility model;

[0015] Figure 4 It is a structural diagram of the protection device of the utility model.

[0016] In the figure: 1. Base; 2. Hydraulic device; 3. Limiting device; 4. Protective device; 21. Hydraulic cylinder; 22. Piston rod; 31. Stabilizing rod; 32. Stabilizing spring; 33. Stabilizing block; 34. Indicating block; 35. Fixed block; 36. Dial; 41. Protective vertical pole; 42. Protective horizontal rod; 43. Connecting rod. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for purposes of illustration and description and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention and to enable those skilled in the art to understand the present invention and design various embodiments with various modifications suitable for specific applications.

[0018] Example:

[0019] See also Figure 1 - Figure 4 The utility model provides a technical solution: a hydraulic cylinder for preventing overload and leakage, comprising: a base 1; a hydraulic device 2, the bottom of the hydraulic device 2 is fixedly connected to the top of the base 1; a limiting device 3, the bottom of the limiting device 3 is fixedly connected to the outer wall of the hydraulic device 2; a protective device 4, the bottom of the protective device 4 is fixedly connected to the top of the base 1; the limiting device 3 includes a stabilizing rod 31, the outer wall of the stabilizing rod 31 is slidably connected to the inner wall of the hydraulic device 2, the top of the stabilizing rod 31 is fixedly connected to a stabilizing block 33, the bottom of the stabilizing block 33 is fixedly connected to a stabilizing spring 32, the outer wall of the stabilizing block 33 is fixedly connected to an indicating block 34, the outer wall of the indicating block 34 is slidably connected to a fixing block 35, and the outer wall of the fixing block 35 is fixedly connected to a scale Disc 36. In daily use, if the hydraulic cylinder is not operated in the correct order and the reverse force is applied before the piston rod 22 is fully retracted, the hydraulic cylinder will be subjected to abnormal load, resulting in overload. During the retraction of the piston rod 22, the stabilizing block 33 in the limit device 3 will be squeezed, causing the stabilizing block 33 to move downward along the stabilizing rod 31, driving the indicating block 34 to slide on the fixed block 35 and point to the corresponding scale on the dial 36, so that the operator can understand the position status of the piston rod 22 more clearly and avoid wrong operation due to misjudgment. The stabilizing spring 32 outside the stabilizing rod 31 can effectively reset the indicating block 34, facilitating the next step of indication.

[0020] The hydraulic device 2 includes a hydraulic cylinder 21, the bottom of which is fixedly connected to the top of the base 1, and the inner wall of the hydraulic cylinder 21 is slidably connected to a piston rod 22. When in use, the base 1 is placed on the ground as the base of the entire equipment. When the hydraulic pump sends hydraulic oil into the chamber on the piston side of the hydraulic cylinder 21 where there is no piston rod 22, the liquid pressure acts on the piston, pushing the piston upward. At the same time, the piston rod 22 in the hydraulic device 2 extends along with the piston, converting hydraulic energy into mechanical energy to drive the external load to move. When the hydraulic oil enters the chamber in the hydraulic cylinder 21 where there is the piston rod 22, the liquid pressure pushes the piston downward, and the piston rod 22 retracts accordingly.

[0021] The stabilizing spring 32 is disposed outside the stabilizing rod 31 , and the bottom of the stabilizing spring 32 is fixedly connected to the top of the hydraulic cylinder 21 .

[0022] The protection device 4 includes a protection vertical rod 41 , the bottom of the protection vertical rod 41 is fixedly connected to the top of the base 1 , and the outer wall of the protection vertical rod 41 is fixedly connected to a protection cross bar 42 .

[0023] The protective vertical rods 41 are arranged in a circular array along the hydraulic cylinder 21, and the protective vertical rods 41 are fixedly connected to the hydraulic cylinder 21 through a connecting rod 43. During the use of the hydraulic device 2, external objects may damage or wear the hydraulic cylinder 21, causing the hydraulic device 2 to be destroyed and causing damage. Therefore, there are protective vertical rods 41 in the circular array outside the hydraulic cylinder 21. The protective vertical rods 41 in the protective device 4 are connected to each other through a protective cross rod 42, and a connecting rod 43 is fixedly connected to the top of the side wall of the protective vertical rod 41. The connecting rod 43 is fixedly connected to the hydraulic cylinder 21 to achieve the purpose of protecting the hydraulic device 2.

[0024] The bottom of the fixing block 35 is fixedly connected to the top of the hydraulic cylinder 21 , and the indicating block 34 passes through the fixing block 35 .

[0025] Working principle:

[0026] When in use, the base 1 is placed on the ground as the base of the entire device. When the hydraulic pump sends hydraulic oil into the chamber on the side of the piston in the hydraulic cylinder 21 without the piston rod 22, the liquid pressure acts on the piston, pushing the piston upward. At the same time, the piston rod 22 in the hydraulic device 2 extends along with the piston, converting hydraulic energy into mechanical energy to drive the external load to move. When the hydraulic oil enters the chamber in the hydraulic cylinder 21 with the piston rod 22, the liquid pressure pushes the piston downward, and the piston rod 22 retracts accordingly.

[0027] In daily use, if the hydraulic cylinder is not operated in the correct order and a reverse force is applied before the piston rod 22 is fully retracted, the hydraulic cylinder will be subjected to an abnormal load, resulting in an overload. During the retraction of the piston rod 22, the stabilizing block 33 in the limit device 3 will be squeezed, causing the stabilizing block 33 to move downward along the stabilizing rod 31, driving the indicating block 34 to slide on the fixed block 35 and point to the corresponding scale on the dial 36, so that the operator can understand the position status of the piston rod 22 more clearly and avoid making wrong operations due to misjudgment. The stabilizing spring 32 outside the stabilizing rod 31 can effectively reset the indicating block 34, facilitating the next step of indicating work.

[0028] During the use of the hydraulic device 2, external objects may damage or wear the hydraulic cylinder 21, causing the hydraulic device 2 to be destroyed and damaged. Therefore, there is a protective vertical rod 41 in the external annular array of the hydraulic cylinder 21. The protective vertical rods 41 in the protective device 4 are interconnected by a protective cross rod 42, and a connecting rod 43 is fixedly connected to the top of the side wall of the protective vertical rod 41. The connecting rod 43 is fixedly connected to the hydraulic cylinder 21 to achieve the purpose of protecting the hydraulic device 2.

[0029] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making any creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in this utility model shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A hydraulic cylinder that prevents overload and leakage, characterized in that: include: Base (1); A hydraulic device (2), wherein the bottom of the hydraulic device (2) is fixedly connected to the top of the base (1); A limiting device (3), wherein the bottom of the limiting device (3) is fixedly connected to the outer wall of the hydraulic device (2); A protective device (4), wherein the bottom of the protective device (4) is fixedly connected to the top of the base (1); The limiting device (3) comprises a stabilizing rod (31), the outer wall of the stabilizing rod (31) is slidably connected to the inner wall of the hydraulic device (2), the top of the stabilizing rod (31) is fixedly connected to a stabilizing block (33), the bottom of the stabilizing block (33) is fixedly connected to a stabilizing spring (32), the outer wall of the stabilizing block (33) is fixedly connected to an indicating block (34), the outer wall of the indicating block (34) is slidably connected to a fixing block (35), and the outer wall of the fixing block (35) is fixedly connected to a dial plate (36).

2. The hydraulic cylinder with anti-overload and anti-liquid leakage according to claim 1, characterized in that: The hydraulic device (2) comprises a hydraulic cylinder (21), the bottom of the hydraulic cylinder (21) is fixedly connected to the top of the base (1), and the inner wall of the hydraulic cylinder (21) is slidably connected to a piston rod (22).

3. The hydraulic cylinder with overload and leakage prevention according to claim 1, characterized in that: The stabilizing spring (32) is arranged outside the stabilizing rod (31), and the bottom of the stabilizing spring (32) is fixedly connected to the top of the hydraulic cylinder (21).

4. The hydraulic cylinder with overload and leakage prevention according to claim 1, characterized in that: The protection device (4) comprises a protection vertical rod (41), the bottom of the protection vertical rod (41) is fixedly connected to the top of the base (1), and the outer wall of the protection vertical rod (41) is fixedly connected to a protection cross bar (42).

5. The hydraulic cylinder with overload and leakage prevention according to claim 4, characterized in that: The protective upright poles (41) are arranged in a circular array along the hydraulic cylinder (21), and the protective upright poles (41) are fixedly connected to the hydraulic cylinder (21) via a connecting rod (43).

6. The hydraulic cylinder with overload and leakage prevention according to claim 1, characterized in that: The bottom of the fixed block (35) is fixedly connected to the top of the hydraulic cylinder (21), and the indicating block (34) passes through the fixed block (35).

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