Shielding screw structure for hole

Abstract

The utility model discloses a shielding screw structure for a hole, which relates to the technical field of paint spraying shielding tools and comprises a screw, a nut and an elastic shielding ring, and the screw is used for penetrating into a countersunk head screw hole of a part with a hole and is fixedly connected with the countersunk head screw hole through the nut; the screw comprises a screw head and a screw shaft which are connected in sequence, a conical surface connecting section is formed at the connecting position of the screw head and the screw shaft, and the conical surface angle of the conical surface connecting section is matched with the conical surface angle of the sunk screw hole; the elastic shielding ring can be arranged on the conical surface connecting section in a sleeving manner, when the screw is fixed in the countersunk screw hole, the screw extrudes the elastic shielding ring to cover the countersunk screw hole, and when the screw is detached, the elastic shielding ring retracts and deforms to be separated from the countersunk screw hole. In the paint spraying and surface strengthening process of the pored part, the inner hole of the pored part can be effectively protected, the shielding effect is good, disassembly and assembly are convenient, and a paint spraying layer is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of paint spraying and masking tooling, in particular to a masking screw structure for a hole. Background Art

[0002] Metal mounting plate structures need to be painted, and sandblasting or shot blasting is required to improve the adhesion of the paint.

[0003] The existing installation disk 01 is as follows Figure 1-Figure 2 As shown, if the inner hole 02 around the mounting plate 01 cannot be effectively protected during the sandblasting or shot blasting process, the roughness inside the hole will be too large and a paint layer will exist in the hole, affecting subsequent assembly.

[0004] At present, masking tape or rubber plug is usually used to protect the inner hole 02 of the mounting plate 01, which has the disadvantages of insufficient protection and complicated operation. Moreover, after painting, when the masking tape or rubber plug is removed, the paint layer around the inner hole 02 is easily damaged. Utility Model Content

[0005] The purpose of the utility model is to provide a hole shielding screw structure to solve the problems existing in the above-mentioned prior art. During the process of painting and surface strengthening of the parts with holes, the inner holes of the parts with holes can be effectively protected, the shielding effect is good, the disassembly and assembly are convenient, and the paint layer is not affected.

[0006] To achieve the above purpose, the present invention provides the following solutions:

[0007] The utility model provides a hole shielding screw structure, comprising a screw, a nut and an elastic shielding ring, wherein the screw is used to penetrate into the countersunk screw hole of a hole-containing part and is fixedly connected to the countersunk screw hole through the nut; the screw comprises a screw head and a screw shaft connected in sequence, and a conical connecting section is formed at the position where the screw head and the screw shaft are connected, and the conical surface angle of the conical connecting section matches the conical surface angle of the countersunk screw hole; the elastic shielding ring can be sleeved on the conical surface connecting section, and when the screw is fixed in the countersunk screw hole, the screw squeezes the elastic shielding ring to cover the countersunk screw hole, and when the screw is removed, the elastic shielding ring shrinks and deforms to disengage from the countersunk screw hole.

[0008] Preferably, the screw head is provided with a hexagonal hole.

[0009] Preferably, a knurled layer is provided on the side wall of the screw head.

[0010] Preferably, the screw head is a cylindrical screw head.

[0011] Preferably, a groove is provided at one end of the screw shaft close to the conical connecting section; the elastic shielding ring is a conical rubber ring, and the small end of the conical rubber ring can be snapped into the groove of the screw shaft.

[0012] Preferably, the inner diameter of the small port of the conical rubber ring is 0.2 mm smaller than the diameter of the screw shaft.

[0013] Preferably, the outer diameter of the large end of the conical rubber ring is 0.2 mm smaller than the outer diameter of the countersunk screw hole.

[0014] Preferably, the nut is a cylindrical knurled hand-tightened nut.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The hole-shielding screw structure provided by the present invention comprises a screw, a nut and an elastic shielding ring. When in use, the elastic shielding ring is first sleeved on the conical connecting section of the screw, and then the screw is inserted into the countersunk screw hole of the hole part, and then the screw and the nut are tightened. The elastic shielding ring is squeezed by the screw, and the clamping force causes the elastic shielding ring to deform, so as to achieve the effect of fully covering the countersunk screw hole, thereby realizing effective protection of the inner hole of the hole part during the painting and surface strengthening process, and convenient installation. Moreover, after the painting is completed, the screw is removed from the hole part, and the clamping force is released, so that the elastic shielding ring shrinks and deforms, thereby detaching from the countersunk screw hole. Since the shrinkage direction of the elastic shielding ring has no stripping effect on the paint layer, the hole-shielding screw structure provided by the present invention not only has a good shielding effect, but also will not damage the paint layer and has no influence on the paint layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 A schematic diagram of an existing installation disk;

[0019] Figure 2 A cross-sectional view of an existing mounting plate.

[0020] Figure 1-Figure 2 Middle: 01-mounting plate, 02-inner hole.

[0021] Figure 3 A schematic diagram of a hole shielding screw structure provided in an embodiment of the present utility model;

[0022] Figure 4 A front view of a hole shielding screw structure provided by an embodiment of the present utility model;

[0023] Figure 5 for Figure 4 Middle A-direction view;

[0024] Figure 6 A cross-sectional view of the hole shielding screw structure provided by an embodiment of the utility model in use.

[0025] Figure 3-Figure 6 Middle: 1-screw, 101-hexagonal hole, 102-groove, 2-nut, 3-elastic shielding ring, 4-parts with holes. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] The purpose of the utility model is to provide a hole shielding screw structure to solve the problems existing in the prior art. During the process of painting and surface strengthening of the parts with holes, the inner holes of the parts with holes can be effectively protected, the shielding effect is good, the disassembly and assembly are convenient, and the paint layer is not affected.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0029] like Figure 3-Figure 4 As shown, this embodiment provides a shielding screw structure for a hole, including a screw 1, a nut 2 and an elastic shielding ring 3. The screw 1 is used to penetrate into the countersunk screw hole of the hole part 4 and is fixedly connected to the countersunk screw hole through the nut 2; specifically, in this embodiment, on the basis of ordinary screws, a special screw with a large lead is used to reduce the number of tightening turns of the nut 2.

[0030] In this embodiment, the screw 1 includes a screw head and a screw shaft connected in sequence, and a conical connecting section is formed at the position where the screw head and the screw shaft are connected, and the conical angle of the conical connecting section matches the conical angle of the countersunk screw hole; specifically, those skilled in the art can adjust the conical angle of the conical connecting section according to the corresponding product to match the conical angles of different countersunk screw holes.

[0031] In this embodiment, the elastic shielding ring 3 can be sleeved on the conical connecting section. When the screw 1 is fixed in the countersunk screw hole, the screw 1 squeezes the elastic shielding ring 3 to cover the countersunk screw hole. When the screw 1 is removed, the elastic shielding ring 3 shrinks and deforms to disengage from the countersunk screw hole.

[0032] In this embodiment, if Figure 5 As shown, a hexagonal hole 101 is provided on the screw head for tightening with a hexagonal wrench, for angular fixation of the screw 1 .

[0033] In this embodiment, a knurled layer is provided on the side wall of the screw head, which facilitates hand-tightening of the screw 1 and also plays a role in angularly fixing the screw 1.

[0034] In this embodiment, the screw head is a cylindrical screw head to minimize obstruction of the root spray paint.

[0035] In this embodiment, a groove 102 is provided at one end of the screw shaft close to the conical connection section; the elastic shielding ring 3 is a conical rubber ring, and the small end of the conical rubber ring can be snapped into the groove 102 of the screw shaft to prevent it from falling off.

[0036] Furthermore, the inner diameter of the small end of the conical rubber ring is 0.2 mm smaller than the diameter of the screw shaft, and the outer diameter of the large end of the conical rubber ring is 0.2 mm smaller than the outer diameter of the countersunk screw hole.

[0037] In this embodiment, the nut 2 is a cylindrical knurled hand-tightened nut, which can meet the clamping force requirement between the screw 1 and the elastic shielding ring 3 by hand-tightening.

[0038] The process of using the hole shielding screw structure provided in this embodiment is as follows:

[0039] like Figure 6 As shown, first, the elastic shielding ring 3 is sleeved on the conical connecting section of the screw 1, and the small end of the elastic shielding ring 3 is clamped in the groove 102 of the screw shaft. Then, the screw 1 is inserted into the countersunk screw hole of the hole part 4, and then the screw 1 is tightened by hand or a hexagonal wrench, and the nut 2 is tightened oppositely. The elastic shielding ring 3 is squeezed by the screw 1, and the clamping force causes the elastic shielding ring 3 to deform, so as to achieve the effect of fully covering the countersunk screw hole. Due to the sufficient tightening force and structural strength, the hole shielding screw provided in this embodiment The nail structure can meet the masking requirements of painting and surface strengthening (such as sand blasting and shot blasting) around the countersunk screw hole of the perforated part 4, and is easy to install. Moreover, after the painting is completed, the screw 1 is removed from the perforated part 4, and the clamping force is released to make the elastic shielding ring 3 shrink and deform, thereby detaching from the countersunk screw hole. Since the contraction direction of the elastic shielding ring 3 has no peeling effect on the paint layer, the hole shielding screw structure provided by this embodiment not only has a good shielding effect, but also will not damage the paint layer and has no effect on the paint layer.

[0040] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A shielding screw structure for a hole, characterized in that: It includes a screw, a nut and an elastic shielding ring, the screw is used to penetrate into the countersunk screw hole of a perforated part and is fixedly connected to the countersunk screw hole through the nut; the screw includes a screw head and a screw shaft connected in sequence, and a conical connecting section is formed at the position where the screw head and the screw shaft are connected, and the conical angle of the conical connecting section matches the conical angle of the countersunk screw hole; the elastic shielding ring can be sleeved on the conical connecting section, and when the screw is fixed in the countersunk screw hole, the screw squeezes the elastic shielding ring to cover the countersunk screw hole, and when the screw is removed, the elastic shielding ring shrinks and deforms to disengage from the countersunk screw hole.

2. The hole shielding screw structure according to claim 1, characterized in that: The screw head is provided with a hexagonal hole.

3. The hole shielding screw structure according to claim 1, wherein: A knurling layer is provided on the side wall of the screw head.

4. The hole shielding screw structure according to claim 1, wherein: The screw head is a cylindrical screw head.

5. The hole shielding screw structure according to claim 1, characterized in that: A groove is provided at one end of the screw shaft close to the conical connecting section; the elastic shielding ring is a conical rubber ring, and the small end of the conical rubber ring can be snapped into the groove of the screw shaft.

6. The hole shielding screw structure according to claim 5, characterized in that: The inner diameter of the small port of the tapered rubber ring is 0.2 mm smaller than the diameter of the screw shaft.

7. The hole shielding screw structure according to claim 5, characterized in that: The outer diameter of the large end of the conical rubber ring is 0.2 mm smaller than the outer diameter of the countersunk screw hole.

8. The hole shielding screw structure according to claim 1, wherein: The nut is a cylindrical knurled hand-tightened nut.

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