Expansion nut for a hole plate

Abstract

The utility model discloses an expansion nut for hole board, include: nut subassembly, nut subassembly includes nut body, the bottom fixed connection of nut body has antiskid rubber ring, the outside surface of nut body is provided with open slot one side away from fixed part, the nut body surface of being located open slot top is fixed connection respectively with first thickening and second thickening, and first thickening and second thickening are along the circumferential interval distribution of nut body, is set up with the inside of limit slot and the outside of antiskid rubber ring of nut body on the limit slot. The utility model discloses open slot makes the elastic expansion of nut body when inserting hole board hole, need through screw control the expansion strength of nut, and the diameter error of automatic adaptation hole and wooden stick / accessory, the bottom antiskid rubber ring nitrile rubber / silicon rubber is extruded with hole board hole inner wall through sawtooth protruding, and the friction is increased, and the limit slot is attached with antiskid rubber ring, prevents the axial movement of antiskid rubber ring, avoids the drop of friction because of loosening.

Description

Technical Field

[0001] This utility model belongs to the field of expansion bolt technology, specifically relating to an expansion nut for perforated boards. Background Technology

[0002] The straight wooden rods currently used in perforated boards on the market have limited tightness due to errors in processing equipment. Furthermore, the straight wooden rods used in perforated boards on the market will naturally shrink in volume due to physical pressure after long-term use, resulting in a decrease in tightness between them and the holes in the perforated board.

[0003] For example, Chinese Utility Model Patent Application No. CN2202321521688.9 discloses a utility model entitled "Anti-Loosening Expansion Nut," which includes an expansion nut threadedly connected to an expansion screw. The expansion nut includes a straight portion and an expansion portion, the expansion portion including an elastic end, and a longitudinal groove provided between the elastic ends. A hook is provided on the elastic end. The elastic end of the expansion nut is normally in a contracted state, and when the expansion screw is installed in the expansion nut, the expansion screw pushes open the elastic end, causing the elastic end to be in an expanded state. By adopting the design of the straight portion and expansion portion of the expansion nut, combined with the hook structure of the elastic end, the slippage between the expansion nut and the base body is prevented during the installation of the expansion screw, and the installed expansion nut is not easy to loosen.

[0004] For example, Chinese utility model patent application CN201720436310.7 discloses a utility model entitled "Expansion Nut" for use with a wrench to remove internal angle screws. The internal angle screw has a polygonal rotating hole. The expansion nut includes a sleeve and external threads formed on the side wall of the sleeve. The sleeve is a polygonal sleeve adapted to the shape of the rotating hole. The sleeve forms a drive hole for accommodating the wrench. At least one notch is provided on the side wall of the sleeve to allow the wrench to press against the sleeve and expand it outwards when it enters the drive hole. This expansion nut can be used with a wrench to remove stripped internal angle screws without damaging the screw hole.

[0005] For example, Chinese utility model patent application number CN202220239181.3 discloses a utility model entitled "A Quick-Construction Elastic Expansion Nut and a Detachable Blind Bolt", which includes a bolt rod, an expansion nut, a washer, and a nut sequentially sleeved on the outer periphery of the bolt rod. The expansion nut includes a first sleeve and a second sleeve, with the second sleeve located inside the first sleeve. The inner wall of the second sleeve is provided with internal threads. The first sleeve includes a connecting section and an expansion section. The connecting section is fixedly connected to the second sleeve. The inner diameter of the expansion section is larger than the outer diameter of the second sleeve. The expansion section extends obliquely from the inner circle outward in a direction away from the connecting section. Several strip-shaped openings are evenly distributed on the circumference of the expansion section to make the expansion section elastic, and the expansion section is close to the washer.

[0006] In the existing technology described above, the perforated board fittings with round holes are presented by inserting round wooden sticks. This connection method limits the external extension of the fittings and results in poor tightness. Summary of the Invention

[0007] This utility model addresses the shortcomings of existing technologies by providing an expansion nut for perforated boards.

[0008] The expansion nut for the perforated plate includes:

[0009] Nut assembly, the nut assembly includes a nut body; the bottom of the nut body is fixedly connected with an anti-slip rubber ring;

[0010] An open groove is provided on the outer surface of the nut body away from the fixing member; a first thickening member and a second thickening member are fixedly connected to the nut body surface above the open groove, and the first thickening member and the second thickening member are distributed at intervals along the circumference of the nut body.

[0011] A limiting groove is provided on the nut body, and the inner side of the limiting groove is fitted to the outer side of the anti-slip rubber ring.

[0012] Furthermore, the anti-slip rubber ring has a ring structure with a rectangular or trapezoidal cross-section, and the outer surface of the anti-slip rubber ring is provided with serrated protrusions, the hardness of which is Shore A 50~70.

[0013] Furthermore, the open slot can be any one of a double-opening slot, a triple-opening slot, or a quadruple-opening slot;

[0014] The two openings of the double-opening slot are symmetrically distributed at 180° along the axial direction of the nut body; the three openings of the triple-opening slot are evenly distributed at 120° along the axial direction of the nut body; and the four openings of the quadruple-opening slot are evenly distributed at 90° along the axial direction of the nut body.

[0015] The depth of the open slot is 1 / 4 to 1 / 3 of the height of the nut body. The nut height is 17mm, the open slot height is 12mm, and the width is 1 / 5 to 1 / 3 of the diameter of the nut body.

[0016] Furthermore, both the first and second thickened parts are annular bosses;

[0017] Preferably, the inner diameter of the first thickening member is smaller than the inner diameter of the second thickening member, the thickness of the first thickening member is 2~4mm, the thickness of the second thickening member is 1~3mm, and the axial distance between the first thickening member and the second thickening member is 1 / 2~2 / 3 of the depth of the open groove.

[0018] Furthermore, the limiting groove is an annular groove;

[0019] Preferably, the depth of the limiting groove is 2~5mm, the width is 3~8mm, and the overlap length between the limiting groove and the open groove in the axial direction of the nut body is 1 / 3~1 / 2 of the total length of the open groove.

[0020] Furthermore, the nut body is made of nylon plastic, and the anti-slip rubber ring is made of nitrile rubber or silicone rubber. The nut body and the anti-slip rubber ring are fixedly connected by vulcanization bonding.

[0021] Furthermore, the top of the nut body is provided with a standard threaded hole for connecting external accessories.

[0022] Furthermore, an annular retaining ring is provided at the tail of the nut body.

[0023] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0024] 1. The expansion nut for perforated boards described in this utility model has an open groove that allows the nut body to expand elastically when inserted into the holes of the perforated board, automatically adapting to the diameter error between the holes and the wooden stick / accessory, ensuring a tight initial connection; the bottom anti-slip rubber ring, made of nitrile rubber / silicone rubber, presses against the inner wall of the perforated board holes through serrated protrusions, increasing friction and raising the coefficient of friction to 0.6~0.8, ensuring stable fixation even with minor tolerances; the limiting groove fits against the anti-slip rubber ring to prevent axial movement of the anti-slip rubber ring, avoiding a decrease in friction due to loosening;

[0025] 2. The expansion nut for perforated boards described in this utility model features an anti-slip rubber ring made of nitrile rubber / silicone rubber with high elasticity, which can absorb volume changes, contraction or expansion of the wooden / plastic rod, preventing the gap from increasing due to size changes; the serrated protrusions on the outer surface of the anti-slip rubber ring are embedded in the inner wall of the perforated board holes to form a mechanical lock, so that even if the rubber ring is slightly aged, it can still maintain tightness through the serrated engagement; the first thickened part with a thickness of 2~4mm and the second thickened part with a thickness of 1~3mm are distributed circumferentially to strengthen the structural strength of the open groove and prevent the nut body from deforming due to long-term stress;

[0026] 3. The expansion nut for the pegboard described in this utility model has a double-opening slot that allows accessories to be inserted from horizontal, inclined, or vertical directions. A single hole can connect two accessories in different directions, such as a horizontal hook and a vertical storage basket. The triple-opening slot supports the simultaneous connection of accessories in three directions, such as an inclined LED light panel, a horizontal tool rack, and a vertical flower pot hook, which greatly improves space utilization. The standard threaded hole at the top can directly connect accessories with screws without the need for additional adapters, reducing user costs.

[0027] 4. The expansion nut for perforated boards described in this utility model is made of nylon plastic, which is lightweight and low-cost. The open groove reduces material usage and is suitable for thin-walled holes in perforated boards with a panel thickness of 15-25mm. No pre-embedding or drilling is required. Simply align the nut body with the hole in the perforated board and press it down. The open groove will automatically lock in place after elastic expansion. Installation takes only 5-10 seconds per nut, saving 80% of the time compared to inserting wooden sticks. The limiting groove fits snugly with the anti-slip rubber ring, and the staggered distribution of the first and second thickened parts prevents the nut body from rotating and loosening after installation, eliminating the need for additional reinforcement.

[0028] 5. The expansion nut for the perforated board described in this utility model has a nylon plastic body that is acid and alkali resistant and anti-aging, making it suitable for humid environments such as kitchens and bathrooms; the rubber anti-slip ring has strong weather resistance, avoiding failure caused by high-temperature softening or low-temperature embrittlement; the serrated protrusions on the outer surface of the anti-slip ring can be embedded into the inner wall of the hole, reducing dust / debris accumulation and lowering the maintenance frequency. Attached Figure Description

[0029] Figure 1 This is a left-side three-dimensional structural diagram of the expansion nut used in the perforated plate.

[0030] Figure 2 This is a right-side three-dimensional structural diagram of the expansion nuts used in the perforated plate.

[0031] Figure 3 A schematic diagram of the double-opening three-dimensional structure of the perforated plate using expansion nuts;

[0032] Figure 4 A schematic diagram of the three-dimensional structure of the perforated plate with an expansion nut and three openings;

[0033] Figure 5 A top view of the three-opening structure of the perforated plate using expansion nuts;

[0034] Figure 6 for Figure 5 Schematic diagram of the AA cross-section structure;

[0035] Figure 7 This is an exploded view of the expansion nut structure for the perforated plate.

[0036] Figure 8This is a schematic diagram of the installation of the nut body in the expansion nut structure for the perforated plate;

[0037] Figure 9 This is a schematic diagram of the installation of the hanger in the expansion nut structure for the perforated plate;

[0038] Figure 10 This is a schematic diagram of the screw installation in the expansion nut structure for the perforated plate;

[0039] Figure 11 A schematic diagram of the thickened expansion nut component for the perforated plate;

[0040] Figure label:

[0041] 1. Anti-slip rubber ring; 2. Open groove; 3. Body structure; 4. Double open groove; 5. Triple open groove; 6. First thickened part; 7. Second thickened part; 8. Hanger; 9. Screw; 10. Hole; 11. Nut body; 12. Barb; 13. Retaining ring. Detailed Implementation

[0042] like Figures 1 to 2 As shown, the expansion nut of this utility model includes:

[0043] The nut assembly includes a nut body 11; an anti-slip rubber ring 1 is fixedly connected to the bottom of the nut body 11.

[0044] An open groove 2 is provided on the outer surface of the nut body 11 away from the fixing member; a first thickening member 6 and a second thickening member 7 are fixedly connected to the surface of the nut body 11 above the open groove 2, and the first thickening member 6 and the second thickening member 7 are distributed at intervals along the circumference of the nut body 11.

[0045] A limiting groove is provided on the nut body 11, and the inner side of the limiting groove is fitted to the outer side of the anti-slip rubber ring 1.

[0046] The anti-slip rubber ring 1 has two functions: first, to prevent the expansion nut from rotating on its own. During installation, the anti-slip rubber ring 1 expands with the screw and contacts the outer wall of the hole 10 to increase friction and prevent the expansion nut from rotating on its own during installation; second, to reinforce and prevent detachment by utilizing the friction after expansion. After the extension accessory is installed, the anti-slip rubber ring 1 contacts the outer wall of the hole 10 to prevent the extension accessory from slipping off due to shaking during use.

[0047] Furthermore, the anti-slip rubber ring 1 has a ring structure with a rectangular or trapezoidal cross-section, and the outer surface of the anti-slip rubber ring 1 is provided with serrated protrusions, the hardness of which is Shore A 50~70.

[0048] Furthermore, such as Figures 3 to 4 As shown, the open slot 2 is any one of the double-opening slot 4, the triple-opening slot 5, and the quadruple-opening slot;

[0049] The two openings of the double-opening slot 4 are symmetrically distributed at 180° along the axial direction of the nut body 11, the three openings of the triple-opening slot 5 are evenly distributed at 120° along the axial direction of the nut body 11, and the four openings of the quadruple-opening slot are evenly distributed at 90° along the axial direction of the nut body.

[0050] The depth of the open slot 2 is 1 / 4 to 1 / 3 of the height of the nut body 11. The nut height is 17mm, the open slot height is 12mm, and the width is 1 / 5 to 1 / 3 of the diameter of the nut body 11.

[0051] Furthermore, such as Figure 11 As shown, both the first thickened part 6 and the second thickened part 7 are annular bosses;

[0052] Preferably, the inner diameter of the first thickening member 6 is smaller than the inner diameter of the second thickening member 7, the thickness of the first thickening member 6 is 2~4mm, the thickness of the second thickening member 7 is 1~3mm, and the axial distance between the first thickening member 6 and the second thickening member 7 is 1 / 2~2 / 3 of the depth of the open groove. Since the specifications of the expansion nut are determined by the size of the hole in the perforated plate and the depth of the plate, the specifications of the first thickening member 6 and the second thickening member 7 can be adjusted according to actual needs and are not limited to the specific data in this application.

[0053] Furthermore, the limiting groove is an annular groove;

[0054] Preferably, the limiting groove has a depth of 2~5mm and a width of 3~8mm, and the overlap length between the limiting groove and the open groove 2 in the axial direction of the nut body 11 is 1 / 3~1 / 2 of the total length of the open groove; the specifications of the limiting groove can be adjusted according to actual needs, and are not limited to the specific data in this application.

[0055] Furthermore, the nut body 11 is made of nylon plastic, and the anti-slip rubber ring 1 is made of nitrile rubber or silicone rubber. The nut body 11 and the anti-slip rubber ring 1 are fixedly connected by vulcanization bonding.

[0056] Furthermore, the top of the nut body 11 is provided with a standard threaded hole for connecting external accessories.

[0057] Furthermore, the anti-slip rubber ring 1 is set in the limiting groove at the bottom of the nut body 11, so the expansion nut can be used normally in actual process without the anti-slip rubber ring.

[0058] Furthermore, an annular retaining ring 13 is provided at the tail of the nut body 11 to prevent longitudinal displacement of the expansion nut during installation.

[0059] Furthermore, a number of equally spaced barbs 12 are fixedly connected to the outer surface of the nut body 11 located between the mounting part and the first thickened part 6;

[0060] Each expansion nut has been tested and can withstand a tensile force of 10KG. The expansion nut extension accessories include: wall-mounted flower rack, wall-mounted helmet rack, pet rack, headphone rack, wall-mounted skateboard rack, wall-mounted guitar rack, hat display rack, and clothes rack. The extension accessories only need to have screw holes, and can be connected to the perforated board holes 10 through the expansion nuts of the perforated board.

[0061] like Figure 5 , Figure 6 As shown, the present invention preferably has three opening grooves 5, the diameter or width of the expansion nut is 15mm, the width of the three opening grooves 5 is 1.5mm, the length or height of the expansion nut is 17mm, the thickness of the anti-slip rubber ring 1 is 2.5mm, the depth of the limiting groove is 3mm, the length or height of the three opening grooves 5 is 12mm, the thickness of the first thickening member 6 is 2mm, the thickness of the second thickening member 7 is 1.5mm, and the first thickening member 6 and the second thickening member 7 are spaced 5.5mm apart.

[0062] Now combined Figures 7 to 10 The following is an example of how to install the expansion nut:

[0063] The expansion nut body has a hexagonal head for easy tool turning, a threaded sleeve in the middle, and an expandable elastic flap or bidirectional expansion structure at the tail. Matching components include a flat-headed screw that matches the internal thread of the expansion nut and acts as a hook. The plate has regularly arranged round holes with diameters adapted to the outer diameter of the expansion nut.

[0064] Step 1: Positioning and drilling. If the board material is not pre-drilled:

[0065] Mark the hole positions on the plate according to the design location, and drill the holes with a suitable drill bit. The diameter should be slightly smaller than the outer diameter of the expansion nut, and the hole depth should be slightly larger than the tail length of the expansion nut to avoid excessive length, which would make installation difficult.

[0066] Step 2: Insert the expansion nut into hole 10:

[0067] Insert the nut in the forward direction, aligning the end with the expansion flap with the hole 10 in the plate. Gently press and rotate the hexagonal head from one side of the plate to tighten the flap inside the hole. If it is designed for unidirectional expansion, ensure that the tip of the flap faces the inside of the plate. If it is designed for bidirectional expansion, there is no need to distinguish the direction. If the insertion resistance is large, you can gently tap the hexagonal head to assist in positioning and ensure that the axis of the expansion nut is perpendicular to the axis of the hole 10.

[0068] Step 3: Attach the hanging parts, taking a hook as an example:

[0069] Pass the screw end of the hook through the hole 10 on the other side of the plate, or align it directly with the expansion nut, so that the hook opening faces the desired direction, such as horizontal or vertical;

[0070] Step 4: Tighten and secure:

[0071] Use a screwdriver to rotate the hexagonal head of the expansion nut clockwise, causing the internal threaded sleeve to move inward toward the inside of the plate.

[0072] The principle of bidirectional expansion is that as the sleeve moves inward, the elastic flap at the tail is squeezed by the hole wall and expands in both directions, such as radial symmetrical expansion. At the same time, the outer flap is pressed against the outer hole wall of the plate, and the inner flap is squeezed against the inner side of the hole, forming bidirectional friction and mechanical engagement, which greatly improves the tensile strength.

[0073] Tighten to the standard until the hexagonal head fits against the surface of the board without any looseness or free rotation. The torque can be controlled with a torque wrench to avoid overloading and damaging the board.

[0074] Step 5: Check stability

[0075] To test the firmness of the hook, observe whether the tail of the expansion nut is fully expanded. A slight bulge or contact with the hole wall can be seen from the outside of the plate. If there is no displacement or detachment, it is considered qualified.

[0076] The working principle of the expansion nut for perforated boards provided by this utility model is as follows:

[0077] First step: The nut assembly needs to be used with an external bolt. The user needs to first insert the nut assembly into the corresponding hole 10 on the perforated plate, and then pass the bolt through the hook and other connectors and thread it to the nut body 11. Since the nut body 11 is made of elastic plastic, silicone and other materials, the insertion of the bolt will push the part of the nut body 11 around the opening outward, so that the barb 12 and the rubber anti-slip ring 1 can fully contact the inner wall of the hole 10. When the bolt and the hook and other connectors are subjected to outward pulling force, the reaction force exhibited by the barb 12 and the anti-slip ring 1 with high friction designed in this structure can greatly reduce the possibility of the nut assembly loosening.

[0078] Second step: Since the hook and the bolt end protruding from the hole need to bear the weight of the hung object, the bolt head inside the hole 10 is prone to tilting upwards due to gravity. In order to prevent the head of the nut body 11 made of silicone, plastic or other materials from being deformed or damaged by the compression of the bolt head, the device is equipped with a first thickening part 6 and a second thickening part 7 at the head of the nut body 11, so that its head has better anti-compression ability and improves the service life of the nut assembly.

[0079] The expansion nut of this utility model has an outer diameter that is compatible with the standard hole diameter of sheet metal, such as 5 / 16”, 3 / 8”, etc., without the need for an additional adapter, and is compatible with mainstream sheet metal specifications;

[0080] The expansion nut described in this utility model can be quickly disassembled and assembled, supports single-sided operation, and does not require disassembling the other side of the plate. It can be removed by rotating the hexagonal head in the opposite direction during disassembly. It can be reused without damaging the plate and features an elastic flap reset design.

[0081] The expansion nut described in this utility model is compatible with multiple scenarios. In addition to hooks, it can connect to various accessories with screws, such as shelf supports, lighting brackets, tool racks, etc., to meet the needs of multiple scenarios such as kitchens, wardrobes, and industrial equipment.

[0082] The expansion nut described in this invention has optimized load-bearing capacity. Its bidirectional expansion structure ensures uniform distribution of tensile force, increasing load-bearing capacity by 30%-50% compared to traditional unidirectional expansion nuts.

[0083] The preferred embodiments of this utility model are not intended to limit the utility model. Any modifications, equivalent substitutions, and improvements made within the concept and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An expansion nut for perforated boards, characterized in that, include: Nut assembly, the nut assembly includes a nut body; the bottom of the nut body is fixedly connected with an anti-slip rubber ring; An open groove is provided on the outer surface of the nut body away from the fastener; The nut body surface located above the open slot is fixedly connected with a first thickening component and a second thickening component, which are distributed at intervals along the circumference of the nut body. A limiting groove is provided on the nut body, and the inner side of the limiting groove is fitted to the outer side of the anti-slip rubber ring.

2. The expansion nut for perforated boards according to claim 1, characterized in that, The anti-slip rubber ring has a ring structure with a rectangular or trapezoidal cross-section, and the outer surface of the anti-slip rubber ring has serrated protrusions with a hardness of Shore A 50~70.

3. The expansion nut for perforated boards according to claim 1, characterized in that, The open slot can be any one of a double-opening slot, a triple-opening slot, or a quadruple-opening slot. The two openings of the double-opening slot are symmetrically distributed at 180° along the axial direction of the nut body; the three openings of the triple-opening slot are evenly distributed at 120° along the axial direction of the nut body; and the four openings of the quadruple-opening slot are evenly distributed at 90° along the axial direction of the nut body. The depth of the open slot is 1 / 4 to 1 / 3 of the height of the nut body. The nut height is 17mm, the open slot height is 12mm, and the width is 1 / 5 to 1 / 3 of the diameter of the nut body.

4. The expansion nut for perforated boards according to claim 1, characterized in that, Both the first and second thickened parts are annular bosses; The inner diameter of the first thickened part is smaller than that of the second thickened part. The thickness of the first thickened part is 2~4mm, the thickness of the second thickened part is 1~3mm, and the axial distance between the first thickened part and the second thickened part is 1 / 2~2 / 3 of the depth of the open groove.

5. The expansion nut for perforated boards according to claim 1, characterized in that, The limiting groove is an annular groove; The depth of the limiting groove is 2~5mm, the width is 3~8mm, and the overlap length between the limiting groove and the open groove in the axial direction of the nut body is 1 / 3~1 / 2 of the total length of the open groove.

6. The expansion nut for perforated boards according to claim 1, characterized in that, The nut body is made of nylon plastic, and the anti-slip rubber ring is made of nitrile rubber or silicone rubber. The nut body and the anti-slip rubber ring are fixedly connected by vulcanization bonding.

7. The expansion nut for perforated boards according to claim 1, characterized in that, The nut body has a standard threaded hole on the top for connecting external accessories.

8. The expansion nut for perforated boards according to claim 1, characterized in that, A ring-shaped retaining ring is provided at the tail of the nut body.

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