A special tool for hydraulic cylinder oil seal maintenance

Abstract

The utility model discloses a hydraulic pressure oil cylinder oil seal maintenance special tool, including base, the upper end fixed mounting of base has fixed clamping plate, the fixed clamping plate is arc plate, one side of fixed clamping plate is provided with movable clamping plate, the movable clamping plate is arc plate also, be provided with reset guiding mechanism between movable clamping plate and fixed clamping plate, be provided with the compacting mechanism of action of movable clamping plate on the base, the side wall of fixed clamping plate away from movable clamping plate is welded with stand, the upper end of stand projects the upper surface of fixed clamping plate, the utility model discloses a fixed clamping plate, movable clamping plate and compacting mechanism can be fixed to the cylinder body through the setting, through the setting positioning sleeve can play the positioning effect to oil cylinder piston rod, guarantee the process of staff to pull out oil cylinder piston rod, oil cylinder piston rod axis and cylinder barrel axis completely coincide, thereby avoiding eccentricity to cause the piston edge to scrape cylinder inner wall.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder repair technology, specifically a special tool for repairing hydraulic cylinder oil seals. Background Technology

[0002] Hydraulic cylinders are widely used in the field of mechanical equipment. As the core actuator of the hydraulic system, hydraulic cylinders have significant advantages such as compact structure, large output force, smooth movement, and easy realization of linear reciprocating motion. The reliability and stability of their performance are directly related to the operating efficiency, safety and economic benefits of the entire equipment and even the entire production system. Once a failure occurs, the mechanical equipment will be unable to be used normally.

[0003] Based on the faults observed in hydraulic cylinders, the most frequent cause of damage was found to be the cylinder seals. Replacing the cylinder seals requires disassembling the cylinder, which generally involves the following steps: first, separating the cylinder head from the cylinder barrel; then, pulling out the piston rod and piston assembly; and finally, removing the seals. During the extraction of the piston rod and piston assembly, if the piston rod axis is misaligned with the cylinder barrel axis, the edge of the piston assembly can easily scrape against the inner wall of the cylinder barrel, thereby scratching the inner wall of the cylinder barrel or the piston seals. The common method of extracting the piston rod and piston assembly is by manual pulling, which makes it difficult to ensure that the piston rod axis and cylinder barrel axis are completely aligned. Therefore, a special tool for repairing hydraulic cylinder oil seals is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a special tool for repairing hydraulic cylinder oil seals, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a special tool for repairing hydraulic cylinder oil seals, comprising a base, a fixed clamping plate fixedly installed on the upper end of the base, the fixed clamping plate being an arc-shaped plate, a movable clamping plate provided on one side of the fixed clamping plate, the movable clamping plate also being an arc-shaped plate, a reset guide mechanism provided between the movable clamping plate and the fixed clamping plate, a pressing mechanism acting on the movable clamping plate provided on the base, a column welded to the side wall of the fixed clamping plate away from the movable clamping plate, the upper end of the column extending out of the upper surface of the fixed clamping plate, a guide groove provided on the side wall of the column near the movable clamping plate, the upper end of the guide groove being an open structure, a guide block slidably installed in the guide groove, a connecting column fixedly connected to the side wall of the guide block, a positioning sleeve fixedly connected to the end of the connecting column, the axis of the positioning sleeve coinciding with the axis of the fixed clamping plate.

[0006] As a further preferred embodiment of this technical solution, the reset guide mechanism comprises a first side plate, a second side plate, guide rods, a baffle, and a spring. The first side plate is fixedly installed on both sides of the fixed clamping plate, and the second side plate is fixedly installed on both sides of the movable clamping plate. The first and second side plates are parallel to each other. Two guide rods are fixedly installed on the side wall of the first side plate near the second side plate. The guide rods are perpendicular to the first side plate and slide through the second side plate. A baffle is provided on the side of the second side plate away from the first side plate. The baffle is fixedly sleeved on the outer wall of the guide rod. A spring is also wound around the outer surface of the guide rod. The spring is located between the first and second side plates, and both ends of the spring are fixedly connected to the first and second side plates, respectively.

[0007] As a further preferred embodiment of this technical solution, the clamping mechanism consists of a cylinder, a fixed seat, and a pressure plate. The fixed seat is fixedly installed on the upper end of the base and is located on the side of the movable clamping plate away from the fixed clamping plate. A cylinder is fixedly installed on the upper end of the fixed seat, and a pressure plate is fixedly installed at the end of the telescopic rod of the cylinder. The pressure plate is located between the cylinder and the movable clamping plate.

[0008] As a further preferred embodiment of this technical solution, the side walls of the pressure plate and the movable clamping plate are adapted to each other.

[0009] As a further preferred embodiment of this technical solution, the inner diameter of the fixing clamp is equal to the outer diameter of the cylinder body, and the inner diameter of the positioning sleeve is equal to the outer diameter of the cylinder piston rod.

[0010] As a further preferred embodiment of this technical solution, the depth of the guide groove is greater than the depth of the cylinder barrel.

[0011] As a further preferred embodiment of this technical solution, fixing holes are respectively provided at the four corners of the base.

[0012] This utility model provides a special tool for repairing hydraulic cylinder oil seals, which has the following beneficial effects: This utility model can fix the cylinder body by setting a fixed clamping plate, a movable clamping plate and a clamping mechanism. The positioning sleeve can position the cylinder piston rod, ensuring that the cylinder piston rod axis is completely aligned with the cylinder barrel axis when the operator moves the cylinder piston rod, thereby avoiding eccentricity that would cause the piston edge to scrape the inner wall of the cylinder barrel. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a breakdown diagram of the overall structure of this utility model; Figure 3This is a side view of the overall structure of this utility model; Figure 4 This is a schematic diagram of the reset guide mechanism in this utility model; In the diagram: 1. Base; 2. Fixed clamping plate; 3. Movable clamping plate; 4. Cylinder; 5. Fixed seat; 6. Pressure plate; 7. Column; 8. Guide groove; 9. Guide block; 10. Positioning sleeve; 11. Connecting column; 12. Fixing hole; 13. Side plate No. 1; 14. Side plate No. 2; 15. Guide rod; 16. Baffle; 17. Spring. Detailed Implementation

[0014] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0015] This utility model provides a technical solution: such as Figures 1 to 4 As shown in this embodiment, a special tool for repairing hydraulic cylinder oil seals includes a base 1. A fixed clamping plate 2 is fixedly installed on the upper end of the base 1. The fixed clamping plate 2 is an arc-shaped plate. A movable clamping plate 3 is provided on one side of the fixed clamping plate 2. The movable clamping plate 3 is also an arc-shaped plate. A reset guide mechanism is provided between the movable clamping plate 3 and the fixed clamping plate 2. A pressing mechanism acting on the movable clamping plate 3 is provided on the base 1. A column 7 is welded on the side wall of the fixed clamping plate 2 away from the movable clamping plate 3. The upper end of the column 7 extends out of the upper surface of the fixed clamping plate 2. A guide groove 8 is opened on the side wall of the column 7 near the movable clamping plate 3. The upper end of the guide groove 8 is an open structure. A guide block 9 is slidably installed in the guide groove 8. A connecting column 11 is fixedly connected to the side wall of the guide block 9. A positioning sleeve 10 is fixedly connected to the end of the connecting column 11. The axis of the positioning sleeve 10 coincides with the axis of the fixed clamping plate 2.

[0016] The reset guide mechanism consists of a first side plate 13, a second side plate 14, a guide rod 15, a baffle 16, and a spring 17. The first side plate 13 is fixedly installed on both sides of the fixed clamping plate 2, and the second side plate 14 is fixedly installed on both sides of the movable clamping plate 3. The first side plate 13 and the second side plate 14 are parallel to each other. Two guide rods 15 are fixedly installed on the side wall of the first side plate 13 near the second side plate 14. The guide rods 15 are perpendicular to the first side plate 13 and slide through the second side plate 14. A baffle 16 is provided on the side of the second side plate 14 away from the first side plate 13. The baffle 16 is fixedly sleeved on the outer wall of the guide rod 15. The outer surface of the guide rod 15 is also wrapped with a spring 17. The spring 17 is located between the first side plate 13 and the second side plate 14, and the two ends of the spring 17 are fixedly connected to the first side plate 13 and the second side plate 14, respectively.

[0017] Four guide rods 15 guide the two second side plates 14, thereby guiding the movable clamping plate 3. The spring 17 ensures that the movable clamping plate 3 automatically moves away from the fixed clamping plate 2 without external force. The baffle 16 prevents the second side plates 14 from falling off the guide rods 15, thus preventing the movable clamping plate 3 from falling off.

[0018] The clamping mechanism consists of a cylinder 4, a fixed seat 5, and a pressure plate 6. The fixed seat 5 is fixedly installed on the upper end of the base 1. The fixed seat 5 is located on the side of the movable clamping plate 3 away from the fixed clamping plate 2. The cylinder 4 is fixedly installed on the upper end of the fixed seat 5. The pressure plate 6 is fixedly installed at the end of the telescopic rod of the cylinder 4. The pressure plate 6 is located between the cylinder 4 and the movable clamping plate 3. The side walls of the pressure plate 6 and the movable clamping plate 3 are mutually compatible.

[0019] In use, the cylinder 4 can be controlled by the PLC control system. The extension of the telescopic rod of the cylinder 4 can drive the pressure plate 6 to press against the movable clamping plate 3.

[0020] The inner diameter of the fixed clamping plate 2 is equal to the outer diameter of the cylinder body, and the inner diameter of the positioning sleeve 10 is equal to the outer diameter of the cylinder piston rod.

[0021] The depth of the guide groove 8 is greater than the depth of the cylinder barrel.

[0022] With this configuration, the guide block 9 will never disengage from the guide groove 8 during the process of pulling the piston out of the cylinder, thus ensuring that the positioning sleeve 10 always plays a positioning role.

[0023] Fixing holes 12 are provided at the four corners of the base 1.

[0024] The base 1 can be fixed in the installation position by using the external fixing bolts and fixing holes 12.

[0025] This utility model provides a special tool for repairing hydraulic cylinder oil seals, and its working principle is as follows: Initially, guide block 9 is pulled out from guide groove 8. After the cylinder head of the hydraulic cylinder is removed, the cylinder body is placed between fixed clamping plate 2 and movable clamping plate 3, with the piston rod of the cylinder body facing upwards. The extension rod of cylinder 4 is controlled by the PLC control system to extend, causing pressure plate 6 to press against movable clamping plate 3, so that movable clamping plate 3 clamps the cylinder body and fixes it. At this time, guide block 9 is placed into guide groove 8. Since the inner diameter of fixed clamping plate 2 is equal to the outer diameter of cylinder body, and the axis of positioning sleeve 10 coincides with the axis of fixed clamping plate 2, this will make the cylinder body more stable. The centerline of the positioning sleeve 10 coincides with the centerline of the cylinder body, and the inner diameter of the positioning sleeve 10 is equal to the outer diameter of the cylinder piston rod. Moving the positioning sleeve 10 downwards allows it to be fitted onto the outer surface of the cylinder piston rod. At this time, the operator can hold the cylinder piston rod and pull it outwards to remove the cylinder piston rod and piston from the cylinder body. During the process of pulling the cylinder piston rod, the positioning sleeve 10 can position the cylinder piston rod, ensuring that the cylinder piston rod axis is completely aligned with the cylinder axis, thereby avoiding eccentricity that could cause the piston edge to scrape against the inner wall of the cylinder.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic cylinder seal repair tool comprising a base (1) characterised in that: A fixed clamping plate (2) is fixedly installed on the upper end of the base (1). The fixed clamping plate (2) is an arc-shaped plate. A movable clamping plate (3) is provided on one side of the fixed clamping plate (2). The movable clamping plate (3) is also an arc-shaped plate. A reset guide mechanism is provided between the movable clamping plate (3) and the fixed clamping plate (2). A pressing mechanism acting on the movable clamping plate (3) is provided on the base (1). A column (7) is welded to the side wall of the fixed clamping plate (2) away from the movable clamping plate (3). 7) extends out of the upper surface of the fixed clamping plate (2). The column (7) has a guide groove (8) on the side wall near the movable clamping plate (3). The upper end of the guide groove (8) is an open structure. A guide block (9) is slidably installed in the guide groove (8). A connecting column (11) is fixedly connected to the side wall of the guide block (9). A positioning sleeve (10) is fixedly connected to the end of the connecting column (11). The axis of the positioning sleeve (10) coincides with the axis of the fixed clamping plate (2).

2. The special tool for repairing hydraulic cylinder oil seals according to claim 1, characterized in that: The reset guide mechanism consists of a first side plate (13), a second side plate (14), guide rods (15), a baffle (16), and a spring (17). The first side plate (13) is fixedly installed on both sides of the fixed clamping plate (2), and the second side plate (14) is fixedly installed on both sides of the movable clamping plate (3). The first side plate (13) and the second side plate (14) are parallel to each other. Two guide rods (15) are fixedly installed on the side wall of the first side plate (13) near the second side plate (14). The guide rods (15) are perpendicular to each other. The guide rod (15) slides through the second side plate (14) perpendicular to the first side plate (13). A baffle (16) is provided on the side of the second side plate (14) away from the first side plate (13). The baffle (16) is fixedly sleeved on the outer wall of the guide rod (15). A spring (17) is also wound around the outer surface of the guide rod (15). The spring (17) is located between the first side plate (13) and the second side plate (14). The two ends of the spring (17) are fixedly connected to the first side plate (13) and the second side plate (14) respectively.

3. The hydraulic cylinder seal repair tool of claim 1, wherein: The clamping mechanism consists of a cylinder (4), a fixed seat (5), and a pressure plate (6). The fixed seat (5) is fixedly installed on the upper end of the base (1). The fixed seat (5) is located on the side of the movable clamping plate (3) away from the fixed clamping plate (2). The cylinder (4) is fixedly installed on the upper end of the fixed seat (5). The pressure plate (6) is fixedly installed at the end of the telescopic rod of the cylinder (4). The pressure plate (6) is located between the cylinder (4) and the movable clamping plate (3).

4. A special tool for repairing hydraulic cylinder oil seals according to claim 3, characterized in that: The pressure plate (6) and the movable clamping plate (3) are fitted together by their adjacent side walls.

5. A special tool for repairing hydraulic cylinder oil seals according to claim 1, characterized in that: The inner diameter of the fixed clamp (2) is equal to the outer diameter of the cylinder body, and the inner diameter of the positioning sleeve (10) is equal to the outer diameter of the cylinder piston rod.

6. A special tool for repairing hydraulic cylinder oil seals according to claim 1, characterized in that: The depth of the guide groove (8) is greater than the depth of the cylinder barrel.

7. A special tool for repairing hydraulic cylinder oil seals according to claim 1, characterized in that: Fixing holes (12) are provided at the four corners of the base (1).

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