An internally braced perforated connector

Abstract

The utility model provides a kind of inner support type perforation connecting piece, it is related to hardware technical field, including clamping piece one, clamping piece two, coil spring and bolt, coil spring has elasticity, bolt includes nut and screw rod, the screw rod includes extrusion part close to the end of nut and the thread portion away from the end of nut, extrusion part is the spiral rib of the outer diameter greater than the outer diameter of thread portion, spiral direction is consistent with coil spring, spiral rib adjacent circle spacing is equal, thickness gradually increases from head to tail;Clamping piece one is provided with a stepped hole, stepped hole includes thread section and avoidance section, clamping piece two has the same perforation with the inner diameter of avoidance section, thread section is adapted with thread portion, the inner diameter of avoidance section is greater than the outer diameter of extrusion part, the inner diameter of avoidance section is less than the outer diameter under natural state of coil spring.The utility model has the advantages of good inner support locking effect, high dimensional accuracy.

Description

Technical Field

[0001] This utility model relates to the field of hardware technology, and in particular to an internally supported perforated connector. Background Technology

[0002] Fragile and heavy furniture panels such as glass doors, slabs, and marble sometimes require holes to be drilled in the panels when connecting them to other components. Clips are then installed on both sides of the panel, and through bolts pass through these holes to connect the clips, thus connecting the panel to other components. For example, when installing hinges on bathroom glass doors, the hinges need to be connected to the panel in this way. As disclosed in application number CN201810786383.8, the glass door hinge structure uses an expansion bushing that deforms and shortens under pressure to internally support the pre-drilled holes in the panel, eliminating gaps between the holes and improving installation stability and dimensional accuracy. However, the internal support effect achieved by this method is relatively poor. This is because when the end of the expansion bushing is compressed, its deformation location is limited to a local area and it cannot expand the diameter of the expansion bushing as a whole. When the glass plate is thick (and the hole is deep), the internal support contact surface of the hole is small, which can easily cause the glass plate to shift when the bolts are loose. In addition, the expansion bushing can deform under pressure during installation, and it will also deform under the weight of the glass. Thus, the pre-set hole on the glass plate and the perforated part cannot be coaxial (concentric). Therefore, the glass plate will have a certain degree of sinking, and the installation accuracy will also have obvious deviations. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention proposes a connection method that enables simultaneous diameter expansion to achieve internal support for perforated components.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an internally supported perforated connector, characterized in that it includes a first clamping plate, a second clamping plate, a helical spring, and a bolt. The helical spring is elastic. The bolt includes a nut and a screw. The screw includes a pressing part near the nut and a threaded part away from the nut. The pressing part is a helical rib with an outer diameter larger than the outer diameter of the threaded part and a helical direction consistent with the helical spring. The spacing between adjacent turns of the helical rib is equal, and the thickness gradually increases from the head to the tail. The first clamping plate is provided with a stepped hole, which includes a threaded section and a clearance section. The second clamping plate has a through hole with the same inner diameter as the clearance section. The threaded section is adapted to the threaded part. The inner diameter of the clearance section is larger than the outer diameter of the pressing part and smaller than the outer diameter of the helical spring in its natural state.

[0005] Furthermore, the helical spring is formed by molding a single filament with a circular cross-section.

[0006] Furthermore, the helical spring is made of plastic.

[0007] This connector utilizes the elasticity of a helical spring, making its outer diameter slightly smaller than the preset hole on the plate in its natural state. During the tightening of the bolt and the clamp thread, the helical spring is compressed, and the spacing between adjacent coils is gradually increased under the action of the helical ribs. In this way, the helical spring expands its diameter while being axially compressed and the spacing is increased, thereby achieving internal support and locking of the preset hole on the plate. This internal support and locking can also form a pre-tightening force to prevent loosening of the bolt itself. Attached Figure Description

[0008] Figure 1 This is an exploded view of the connector;

[0009] Figure 2 This is a schematic diagram showing the connection between the connector and the sheet metal (the sectioned part represents the sheet metal).

[0010] Figure 3 This is a schematic diagram showing the engagement state of the bolt and the coil spring.

[0011] Legend: 1. Clip 1; 2. Clip 2; 3. Helical spring; 4. Nut; 5. Extrusion section; 6. Threaded section; 7. Threaded section; 8. Clearance section; 9. Perforation. Detailed Implementation

[0012] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0013] like Figure 1 , Figure 2 and Figure 3 As shown, it includes a clamping plate 1, a clamping plate 2, a helical spring 3, and a bolt. The helical spring 3 is elastic. The bolt includes a nut 4 and a screw. The screw includes a pressing part 5 near the nut 4 and a threaded part 6 away from the nut 4. The pressing part 5 is a helical rib with an outer diameter larger than the outer diameter of the threaded part 6 and a helical direction consistent with the helical spring 3. The spacing between adjacent turns of the helical rib is equal, and the thickness gradually increases from the head to the tail. A stepped hole is provided on the clamping plate 1. The stepped hole includes a threaded section 7 and a clearance section 8. The clamping plate 2 has a through hole 9 with the same inner diameter as the clearance section 8. The threaded section 7 is adapted to the threaded part 6. The inner diameter of the clearance section 8 is larger than the outer diameter of the pressing part 5 and smaller than the outer diameter of the helical spring 3 in its natural state. The helical spring 3 is made of a single wire with a circular cross-section and is made of plastic.

[0014] During installation, a pre-drilled hole slightly smaller than the outer diameter of the coil spring 3 is made in the sheet metal. Then, clamping plates 1 and 2 are placed on either side of the sheet metal. The bolt passes through the through hole 9 on clamping plate 2. The bolt is rotated until the spiral rib is aligned with the coil gap of the coil spring 3, until the threaded portion 6 engages with the threaded section 7. The bolt is then rotated further, allowing it to continue screwing into the threaded section 7. During this process, the spiral rib, while maintaining its engagement with the coil spring 3, gradually increases in thickness, compressing the coil spring 3 to increase the spacing between adjacent coils. Simultaneously, the bolt continuously applies a clamping force to the coil spring 3, causing it to shorten. Under these two external forces, the coil spring 3 balances itself by increasing its outer diameter and decreasing the number of coils, achieving internal support and locking within the pre-drilled hole. This provides full-area internal support within the pre-drilled hole, preventing stress concentration on the glass and also releasing pre-tightening force on the bolt.

[0015] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. An internally supported perforated connector, characterized in that, The device includes a clamping plate 1 (1), a clamping plate 2 (2), a helical spring (3), and a bolt. The helical spring (3) is elastic. The bolt includes a nut (4) and a screw. The screw includes a pressing part (5) near the nut (4) and a threaded part (6) away from the nut (4). The pressing part (5) is a helical rib with an outer diameter greater than the outer diameter of the threaded part (6) and a helical direction consistent with the helical spring (3). The spacing between adjacent turns of the helical rib is equal, and the thickness gradually increases from the head to the tail. A stepped hole is provided on the clamping plate 1 (1). The stepped hole includes a threaded section (7) and a clearance section (8). The clamping plate 2 (2) has a through hole (9) with the same inner diameter as the clearance section (8). The threaded section (7) is adapted to the threaded part (6). The inner diameter of the clearance section (8) is greater than the outer diameter of the pressing part (5) and the inner diameter of the clearance section (8) is smaller than the outer diameter of the helical spring (3) in its natural state.

2. The internally supported perforated connector according to claim 1, characterized in that, The helical spring (3) is formed by molding a single filament with a circular cross-section.

3. The internally supported perforated connector according to claim 1 or 2, characterized in that, The helical spring (3) is made of plastic.

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