Clamp for protecting metal surface

Abstract

The utility model discloses a clamp for protecting a metal surface, which belongs to the technical field of aviation equipment test devices and comprises a gland, an electrode, an upper cover, a rubber pad and a lower cover, the upper cover and the lower cover are oppositely closed and fixed to form a cylindrical clamping structure used for clamping a piston rod of an auxiliary oil valve, and the outer wall of the clamping structure is hollowed out according to the position needing surface treatment. A rubber pad is attached to the inner wall of the non-hollowed-out position to achieve protection, the electrode is fixed to the center of the gland and inserted into an inner hole of a piston rod of the auxiliary oil valve, and the gland is fixed to one end of the clamping structure. The device is simple and practical in structure, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of aviation equipment testing devices, and relates to a clamp for protecting metal surfaces. Background Technology

[0002] After disassembly, the auxiliary oil valve piston rod of the hydraulic booster of a certain type of aircraft requires surface treatment. During surface treatment, it is crucial to ensure that the piston surface remains untreated and is not scratched. Simultaneously, a zinc rod with an internal bore is needed as an electrode. Currently, there is a lack of suitable fixtures for aircraft piston surface treatment, resulting in high work difficulty and low efficiency. Utility Model Content

[0003] This invention provides a metal surface protection clamp that can meet the surface treatment requirements of a certain type of aircraft piston.

[0004] The present invention adopts the following technical solution:

[0005] A clamp for protecting metal surfaces includes a pressure cap 1, an electrode 2, a screw 3, an upper cover 4, a rubber pad 5, a lower cover 6, and a bolt 7.

[0006] The upper cover 4 and lower cover 6 have the same structure, both being semi-annular shells. When they are joined together, they form a cylindrical clamping structure for clamping the auxiliary oil valve piston rod. The length of the clamping structure is greater than that of the auxiliary oil valve piston rod. Both the upper cover 4 and lower cover 6 have connecting plates at the joint, with multiple connecting holes on the connecting plates. They are fastened together by bolts 7. The outer shells of the upper cover 4 and lower cover 6 are perforated according to the parts of the auxiliary oil valve piston rod that require surface treatment. Rubber pads 5 are attached to the inner walls of the parts that do not have perforations to prevent scratches on the surface of the auxiliary oil valve piston rod and to protect the parts that do not require surface treatment. A threaded hole is made on one end face of the clamping structure.

[0007] The pressure cap 1 has a central through hole for the electrode 2 to pass through and be fixed. The pressure cap 1 with the electrode 2 fixed on it covers one end of the clamping structure with a threaded hole, and the electrode 2 is inserted into the inner hole of the auxiliary oil valve piston rod clamped in the clamping structure. The pressure cap 1 also has a threaded hole, which corresponds to the threaded hole on the end face of the clamping structure. The position of the pressure cap 1 is fixed by screws 3.

[0008] Furthermore, the rubber pad 5 is made of vulcanized oil-resistant rubber.

[0009] Furthermore, the electrode 2 is a zinc rod.

[0010] The beneficial effects of this utility model are as follows: This utility model has a simple and practical structure, effectively solves the problem of surface treatment of the piston part, and has high practicality, speed and labor saving. At the same time, it can also improve the work efficiency of workers. The oil-resistant rubber inside can protect the inner wall of the piston well. The zinc rod is equipped as an electrode, which reduces the difficulty of work and improves work efficiency. Attached Figure Description

[0011] Figure 1 This is a cross-sectional view of the present invention;

[0012] Figure 2 This is a schematic diagram of the overall design of this utility model;

[0013] Figure 3 for Figure 1 AA section view;

[0014] Figure 4 This is a schematic diagram of a pressure cap.

[0015] Figure 5 This is a schematic diagram of the electrodes.

[0016] The components are: 1. Pressure cap; 2. Electrode; 3. Screw; 4. Top cover; 5. Rubber pad; 6. Bottom cover; 7. Bolt. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in detail below.

[0018] A type of clamp for protecting metal surfaces, such as Figure 1 and Figure 2 As shown, it includes a pressure cap 1, an electrode 2, a screw 3, an upper cover 4, a rubber pad 5, a lower cover 6, and a bolt 7.

[0019] The upper cover 4 and lower cover 6 have the same structure, both being semi-annular shells. When joined together, they form a cylindrical clamping structure for clamping the auxiliary oil valve piston rod. The length of the clamping structure is greater than that of the auxiliary oil valve piston rod. Both the upper cover 4 and lower cover 6 have connecting plates at their joints, each with three corresponding connecting holes, secured by bolts 7. The outer shells of the upper cover 4 and lower cover 6 have perforations for the areas of the auxiliary oil valve piston rod requiring surface treatment. Rubber pads 5, made of vulcanized oil-resistant rubber, are pasted onto the inner walls of the areas without perforations to prevent scratches on the auxiliary oil valve piston rod surface and to protect areas that do not require surface treatment. Two threaded holes are symmetrically formed on one end of the clamping structure. Figure 3 As shown.

[0020] like Figure 4As shown, the pressure cap 1 has a central through hole for the electrode 2 to pass through and be fixed. The pressure cap 1, with the electrode 2 fixed, covers the end of the clamping structure with a threaded hole, and the electrode 2 is inserted into the inner hole of the auxiliary oil valve piston rod clamped in the clamping structure. The pressure cap 1 also has two threaded holes, the positions of which correspond to the threaded holes on the end face of the clamping structure. The position of the pressure cap 1 is fixed by screws 3. The electrode 2 is a zinc rod, such as... Figure 5 As shown.

[0021] In use, separate the upper cover 4 and the lower cover 6. Place the auxiliary oil valve piston rod inside the outer shell of the lower cover 6, aligning the part that does not require surface treatment with the position where the rubber pad 5 is attached. Place the upper cover 4 on the auxiliary oil valve piston rod and fix the upper and lower covers with bolts 7 to clamp the auxiliary oil valve piston rod. Insert the electrode 2 into the through hole in the center of the pressure cover 1 and fix it. Then insert the electrode 2 into the inner hole of the auxiliary oil valve piston rod. Screw the screw 3 into the threaded hole on the end face of the pressure cover 1 and the clamping structure to tighten the pressure cover 1. Then perform the surface treatment operation.

[0022] In summary, the above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A clamp for protecting metal surfaces, characterized in that, Includes pressure cap (1), electrode (2), screw (3), upper cover (4), rubber pad (5), lower cover (6), and bolt (7); The upper cover (4) and lower cover (6) have the same structure, both being shells with a semi-circular cross-section. They fit together to form a cylindrical clamping structure for clamping the auxiliary oil valve piston rod. Both the upper cover (4) and lower cover (6) have connecting plates at the fitting points, with multiple connecting holes on the connecting plates for fastening with bolts (7). The outer shells of the upper cover (4) and lower cover (6) have cutouts for the parts of the auxiliary oil valve piston rod that require surface treatment. Rubber pads (5) are pasted on the inner walls of the parts that do not have cutouts to prevent scratches on the surface of the auxiliary oil valve piston rod and to protect the parts that do not require surface treatment. A threaded hole is made on one end face of the clamping structure. The pressure cap (1) has a through hole in the center for the electrode (2) to pass through and be fixed. The pressure cap (1) with the electrode (2) fixed on it covers one end of the clamping structure with a threaded hole, and the electrode (2) is inserted into the inner hole of the auxiliary oil valve piston rod clamped in the clamping structure. The pressure cap (1) has another threaded hole, which corresponds to the threaded hole on the end face of the clamping structure. The position of the pressure cap (1) is fixed by screws (3).

2. The metal surface protection clamp according to claim 1, characterized in that, The rubber pad (5) is made of vulcanized oil-resistant rubber.

3. A metal surface protection clamp according to claim 1, characterized in that, The electrode (2) is a zinc rod.

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