A protective tool for oil cylinder shot blasting

Abstract

This utility model provides a protective fixture for shot peening hydraulic cylinders, including a clamping threaded sleeve, a threaded lifting rod, a square hook, a cylinder bore cover plate, and a threaded connecting plate assembly. The threaded connecting plate assembly includes a circular threaded ring threaded to the inner wall of the cylinder body, and a rectangular connecting plate fixed to the circular threaded ring. The rectangular connecting plate has a clearance hole in its center for the square hook to pass through. The square hook is connected to the lower end of the threaded lifting rod and is used to support and hook the rectangular connecting plate from below. The cylinder bore cover plate is sleeved on the upper part of the threaded lifting rod, and the clamping threaded sleeve is threaded to the top of the threaded lifting rod, used to seal and press the cylinder bore cover plate tightly against the cylinder bore. A lifting ring is provided at the top of the clamping threaded sleeve. This protective fixture for shot peening hydraulic cylinders improves the convenience of installing and disassembling workpieces during shot peening and avoids the damage caused by steel shot entering the cylinder body.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic cylinder protection tools, specifically, to a protective tooling for hydraulic cylinder shot peening. Background Technology

[0002] Shot peening of cylinder blocks is primarily to improve their fatigue strength, resistance to stress corrosion, and overall service life. During shot peening, the cylinder block needs to be lifted using a lifting device. Existing cylinder block shot peening protective fixtures are typically welded together from three parts; the larger the cylinder diameter, the heavier the fixture. Because large-diameter cylinder block shot peening protective fixtures are very heavy, damage to the threads is likely during installation. Furthermore, existing cylinder block shot peening fixtures have empty grooves at the stop position, which are sealed with O-rings, but the sealing is not very good. During shot peening, steel shot can easily enter the cylinder block, and when the fixture is removed after shot peening, the steel shot remains at the threads, damaging them.

[0003] Utility model patent CN212609040U discloses a lifting device for vertically lifting hydraulic cylinders, including a base plate and lifting lugs. The base plate is an arc-shaped flat plate with multiple mounting holes evenly distributed around the center of rotation of the base plate. The mounting holes are through holes. The lifting lugs are fixedly mounted on the surface of the base plate. This lifting device can successfully lift hydraulic cylinders vertically even when no lifting lugs are available for installation, ensuring the vertical accuracy of the cylinder. However, this lifting device requires covering part of the cylinder bottom during lifting, making it unsuitable for lifting cylinders requiring shot peening. Utility Model Content

[0004] To improve the ease of installation and disassembly of workpieces during hydraulic cylinder shot peening, protect the internal threads of the cylinder from damage, increase the sealing performance of the cylinder body protective fixture, and avoid the problem of steel shot entering the cylinder body and causing damage during shot peening, the technical solution adopted by this utility model is: a protective fixture for hydraulic cylinder shot peening, including a clamping threaded sleeve, a threaded lifting rod, a square hook, a cylinder mouth cover plate, and a threaded connecting plate assembly. The threaded connecting plate assembly includes a circular threaded ring that is threaded to the inner wall of the cylinder, and a rectangular connecting plate fixed on the circular threaded ring. The rectangular connecting plate has an assembly clearance hole in the middle for the square hook to pass through. The square hook is connected to the lower end of the threaded rod, and the square hook is used to support and hook the rectangular connecting plate from below; The top of the threaded rod extends out of the cylinder body, the cylinder port cover is sleeved on the upper part of the threaded rod, and the clamping threaded sleeve is threadedly connected to the top of the threaded rod. The clamping threaded sleeve is used to seal and press the cylinder port cover onto the cylinder port. A lifting ring is provided at the top of the clamping threaded sleeve.

[0005] Based on the above, the outer circumferential surface of the circular threaded ring is provided with an external thread.

[0006] Based on the above, the central axis of the rectangular connecting plate coincides with one of the axes of the circular threaded ring.

[0007] Beneficial effects: By connecting the rectangular connecting plate to the circular threaded ring in the center, it can be effectively ensured that the threaded lifting rod is on the central axis of the cylinder during lifting, preventing the cylinder from tilting during lifting.

[0008] Based on the above, the threaded rod is arranged perpendicularly to the rectangular connecting plate.

[0009] Based on the above, the threaded rod and the clamping threaded sleeve are threadedly engaged.

[0010] Based on the above, rubber sealing gaskets are respectively provided between the compression threaded sleeve and the cylinder port cover plate, and between the cylinder port cover plate and the cylinder port.

[0011] Beneficial effects: By setting rubber sealing gaskets on each contact surface, on the one hand, the rubber sealing gaskets can be used to buffer and avoid collisions between the contact surfaces. On the other hand, the rubber sealing gaskets can also be used to improve the sealing of each contact surface and prevent steel shot from entering the cylinder during shot peening.

[0012] This utility model represents a substantial advancement over existing technologies. Specifically, it provides a protective fixture for shot peening hydraulic cylinders. Through the design of a threaded lifting rod, a threaded clamping sleeve, a threaded connecting plate assembly, a cylinder bore cover, and a lifting ring, which allow for threaded disassembly and reassembly, the components can be assembled onto the cylinder barrel one by one according to their installation positions when lifting the cylinder. This significantly improves the ease of installation and disassembly of the lifting device during shot peening. Furthermore, by designing the threaded connecting plate as a combination of a circular threaded ring and a rectangular connecting plate, the weight of the fixture is significantly reduced during installation while ensuring a tight connection with the internal threads of the cylinder barrel. On the other hand, by installing a cylinder bore cover on the threaded lifting rod and clamping a rubber ring between the cover and the cylinder bore, the sealing performance of the cylinder protective fixture is increased, preventing steel shot from entering the cylinder and causing damage during disassembly. Attached Figure Description

[0013] Figure 1This is a schematic diagram of the protective tooling and cylinder assembly structure for shot peening of a hydraulic cylinder provided by this utility model.

[0014] Figure 2 This is a schematic diagram of the threaded connecting plate assembly in a protective tooling for shot peening of a hydraulic cylinder provided by this utility model.

[0015] Figure 3 This is a schematic diagram of the assembly structure of the threaded rod and square hook in a protective tooling for shot peening of a hydraulic cylinder provided by this utility model.

[0016] In the diagram: 1. Lifting ring; 2. Internal thread; 3. Pressing threaded sleeve; 4. Threaded lifting rod; 5. First rubber gasket; 6. Cylinder port cover plate; 7. Second rubber gasket; 8. Cylinder body; 9. Circular threaded ring; 10. Rectangular connecting plate; 11. Square hook; 12. Assembly clearance hole; 13. External thread. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through specific embodiments.

[0018] Example 1 This embodiment provides a protective fixture for shot peening hydraulic cylinders, such as... Figure 1 , Figure 2 , Figure 3 As shown, it includes a threaded sleeve 3, a threaded rod 4, a square hook 11, a cylinder head cover 6, and a threaded connecting plate assembly.

[0019] The threaded connecting plate assembly includes a circular threaded ring 9 that is threaded to the inner wall of the cylinder 8, and a rectangular connecting plate 10 fixed on the circular threaded ring 9. The rectangular connecting plate 10 has an assembly clearance hole 12 in the middle for the square hook 11 to pass through.

[0020] The square hook 11 is connected to the lower end of the threaded rod 4, and is used to support and hook the rectangular connecting plate 10 from below. The top of the threaded rod 4 extends out of the cylinder body 8, and the cylinder port cover plate 6 is fitted onto the upper part of the threaded rod 4. The clamping threaded sleeve 3 has an internal thread 2, and is threaded to the top of the threaded rod 4. The clamping threaded sleeve 3 is used to seal and press the cylinder port cover plate 6 onto the cylinder port. A lifting ring 1 is provided at the top of the clamping threaded sleeve 3.

[0021] Specifically, the outer circumferential surface of the circular threaded ring 9 is provided with an external thread 13. The central axis of the rectangular connecting plate 10 coincides with one of the axes of the circular threaded ring 9. The threaded hanger 4 is arranged perpendicularly to the rectangular connecting plate 10.

[0022] By connecting the rectangular connecting plate to the circular threaded ring in the center, it can be effectively ensured that the threaded lifting rod is on the central axis of the cylinder during lifting, preventing the cylinder from tilting during lifting.

[0023] In this embodiment, the threaded rod and the clamping threaded sleeve are threadedly engaged.

[0024] Example 2 This embodiment provides a protective fixture for shot peening hydraulic cylinders. The main difference from Embodiment 1 is that, in this embodiment, rubber sealing gaskets are respectively provided between the clamping threaded sleeve 3 and the cylinder port cover plate 6, and between the cylinder port cover plate 6 and the cylinder port. Based on their distribution, they can be designated as the first rubber sealing gasket 2, the first rubber sealing gasket 5, and the second rubber sealing gasket 7.

[0025] By setting rubber sealing gaskets on each contact surface, the rubber sealing gaskets can buffer the impact and prevent collisions between the contact surfaces. On the other hand, the rubber sealing gaskets can also improve the sealing of each contact surface, preventing steel shot from entering the cylinder during shot peening.

[0026] Specifically, the following are the specific steps for using the protective tooling for shot peening hydraulic cylinders provided by this utility model: First, tighten the circular threaded ring in the threaded connecting plate assembly onto the inner wall of the cylinder. Then, pass the lower end of the threaded rod and the square hook through the assembly clearance hole on the rectangular connecting plate and rotate it 90 degrees to ensure that the rectangular connecting plate is supported and clamped from below using the square hook.

[0027] Next, install the cylinder head cover and the clamping threaded sleeve sequentially on the upper end of the threaded rod, using the clamping threaded sleeve to press the cylinder head cover onto the cylinder head. Finally, install the lifting ring on the clamping threaded sleeve.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A protective fixture for shot peening hydraulic cylinders, characterized in that: This includes a threaded sleeve, a threaded rod, a square hook, a cylinder head cover, and a threaded connecting plate assembly; The threaded connecting plate assembly includes a circular threaded ring that is threaded to the inner wall of the cylinder, and a rectangular connecting plate fixed on the circular threaded ring. The rectangular connecting plate has an assembly clearance hole in the middle for the square hook to pass through. The square hook is connected to the lower end of the threaded rod, and the square hook is used to support and hook the rectangular connecting plate from below; The top of the threaded rod extends out of the cylinder body, the cylinder port cover is sleeved on the upper part of the threaded rod, and the clamping threaded sleeve is threadedly connected to the top of the threaded rod. The clamping threaded sleeve is used to seal and press the cylinder port cover onto the cylinder port. A lifting ring is provided at the top of the clamping threaded sleeve.

2. The protective fixture for shot peening a hydraulic cylinder according to claim 1, characterized in that: The outer circumferential surface of the circular threaded ring is provided with external threads.

3. The protective fixture for shot peening a hydraulic cylinder according to claim 1, characterized in that: The central axis of the rectangular connecting plate coincides with one of the axes of the circular threaded ring.

4. A protective fixture for shot peening a hydraulic cylinder according to claim 1, 2, or 3, characterized in that: The threaded rod is perpendicular to the rectangular connecting plate.

5. The protective fixture for shot peening a hydraulic cylinder according to claim 1, characterized in that: The threaded rod and the clamping threaded sleeve are threadedly engaged.

6. A protective fixture for shot peening a hydraulic cylinder according to claim 1, 2, 3, or 5, characterized in that: Rubber sealing gaskets are respectively provided between the compression threaded sleeve and the cylinder head cover plate, and between the cylinder head cover plate and the cylinder head.

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