High-locking-force hexagon socket cap screw

Abstract

The utility model relates to the technical field of screws, in particular to a high-locking-force hexagon socket head cap screw which comprises a hexagon socket head cap screw body, a hexagon socket groove is formed in the top end of the hexagon socket head cap screw body, a rubber pad is fixedly arranged on a rod body of the hexagon socket head cap screw body in a sleeved mode, and a screw joint groove is formed in the bottom face of the hexagon socket groove. A supporting block is inserted into the screwing groove, a rod body of the hexagon socket cap screw body is sleeved with a rubber ring, one end of the supporting block is fixed to the inner ring face of the rubber ring, an extruding and pushing screw rod is screwed into the screwing groove, and the extruding and pushing screw rod pushes the supporting block to stretch and pull the rubber ring; the screw has the beneficial effects that the connection between the screw and a workpiece is reinforced from multiple dimensions through the elastic clamping of the rubber pad, the elastic plugging strip effect of the rubber ring and the hidden reinforcing structure.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to a high-tightening-force internal hexagonal head screw. Background Technology

[0002] In mechanical assembly, equipment manufacturing, and various scenarios requiring fastening connections, hex socket head cap screws are a common fastener widely used to securely connect different workpieces together. However, traditional hex socket head cap screws have some problems that urgently need to be solved in practical use, affecting their connection effect and stability.

[0003] Insufficient anti-loosening performance: During equipment operation, it is inevitable to be subjected to external forces such as vibration and impact. Traditional internal hexagon socket head cap screws rely solely on the friction between the threads to maintain the connection. Under prolonged external interference, the friction between the threads can gradually decrease, leading to loosening of the screw. Once the screw loosens, it will not only affect the normal operation of the equipment but may also cause safety accidents, resulting in equipment damage or even personal injury.

[0004] Limited connection strength: Traditional internal hexagonal head screws mainly rely on the mating of the thread and the screw hole of the workpiece to achieve connection, which is a relatively simple connection method. When the workpiece material is soft or the screw hole is not machined with high precision, the connection strength between the screw and the workpiece will be greatly affected, and problems such as screw slippage and loose screw connection are prone to occur, which cannot meet the requirements of some occasions with high connection strength requirements. Utility Model Content

[0005] The purpose of this invention is to provide a high-tightening-force internal hexagonal head screw to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-tightening-force internal hexagonal head screw, comprising an internal hexagonal head screw body, an internal hexagonal groove at the top of the internal hexagonal head screw body, a rubber pad fixedly fitted on the shank of the internal hexagonal head screw body, a threaded groove at the bottom of the internal hexagonal groove, a support block inserted into the threaded groove, a rubber ring fitted on the shank of the internal hexagonal head screw body, one end of the support block fixed to the inner ring surface of the rubber ring, and a push screw threaded into the threaded groove, the push screw pushing the support block to tension the rubber ring.

[0007] Preferably, the rubber pad is an L-shaped annular piece, and the rubber pad is fitted and fixed on the stepped surface of the body of the internal hexagonal head screw.

[0008] Preferably, the bottom surface of the internal hexagonal slot is provided with an insert groove, the diameter of the insert groove is larger than the diameter of the screw groove, and the top of the push screw is located in the insert groove.

[0009] Preferably, the shank surface of the hexagonal head screw body is provided with an outer ring groove, the outer ring groove is annular, a rubber ring is sleeved and fixed in the outer ring groove, and the inner ring surface of the rubber ring is provided with an inner ring groove.

[0010] Preferably, the surface of the screw groove has two insertion holes, which connect the outer ring groove and the screw groove. The insertion holes and the support blocks correspond one-to-one. The support blocks are inserted into the insertion holes, and one end of the support blocks is fixed in the inner ring groove.

[0011] Preferably, the other end of the support block is provided with a push screw on the top surface, the push screw is screwed into the screw groove, and the bottom end of the push screw is integrally formed with a frustum.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] The high-tightening-force internal hexagon socket head cap screw proposed in this invention strengthens the connection between the screw and the workpiece from multiple dimensions through the elastic clamping of the rubber pad, the elastic plugging effect of the rubber ring, and the concealed reinforcement structure. This multi-dimensional reinforcement method can adapt to workpieces of different materials and screw holes with different machining precision. Even when the workpiece material is relatively soft or the screw hole machining precision is not high, it can ensure a firm connection between the screw and the workpiece, meeting various applications with high connection strength requirements. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a top view of the structure of this utility model;

[0016] Figure 3 for Figure 2 Sectional view of the structure at point AA;

[0017] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Body of the hexagon socket head cap screw; 2. Rubber washer; 3. Socket groove; 4. Insert groove; 5. Threaded groove; 6. Outer ring groove; 7. Insertion hole; 8. Rubber ring; 9. Inner ring groove; 10. Support block; 11. Push screw; 12. Slope; 13. Frustum. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1 to 4 This utility model provides a technical solution: a high-tightening-force internal hexagon head screw, comprising an internal hexagon head screw body 1, with an internal hexagonal groove 3 at the top end of the internal hexagon head screw body 1. A rubber pad 2 is fitted and fixed on the shank of the internal hexagon head screw body 1. The rubber pad 2 is an L-shaped annular piece, fitted and fixed on the stepped surface of the internal hexagon head screw body 1. When the internal hexagon head screw body 1 is used to connect a workpiece, after the internal hexagon head screw body 1 is tightened, the rubber pad 2 is clamped between the top of the internal hexagon head screw body 1 and the workpiece, acting as an elastic washer, thereby ensuring a tight screw connection between the internal hexagon head screw body 1 and the screw hole on the surface of the workpiece.

[0021] The bottom surface of the internal hexagonal socket 3 has a threaded groove 5, and a support block 10 is inserted into the threaded groove 5. The bottom surface of the internal hexagonal socket 3 has an insert groove 4, the diameter of which is larger than the diameter of the threaded groove 5. The top of the push screw 11 is located in the insert groove 4. A rubber ring 8 is fitted on the shank of the internal hexagonal socket head cap screw body 1. An outer ring groove 6 is formed on the surface of the shank of the internal hexagonal socket head cap screw body 1. The outer ring groove 6 is annular. The rubber ring 8 is fitted and fixed in the outer ring groove 6. An inner ring groove 9 is formed on the inner ring surface of the rubber ring 8. The threaded groove 5... Two insertion holes 7 are provided on the surface. The insertion holes 7 connect the outer ring groove 6 and the screw groove 5. The insertion holes 7 and the support blocks 10 correspond one-to-one. The support blocks 10 are inserted into the insertion holes 7. One end of the support blocks 10 is fixed in the inner ring groove 9. One end of the support blocks 10 is fixed to the inner ring surface of the rubber ring 8. The screw groove 5 is screwed with a push screw 11. The push screw 11 pushes the support blocks 10 to tension the rubber ring 8. The other end of the support blocks 10 is provided with a push screw 11 on the top surface. The push screw 11 is screwed in the screw groove 5. The bottom end of the push screw 11 is integrally formed with a frustum 13.

[0022] After the socket head cap screw body 1 is screwed onto the workpiece surface, the rubber ring 8 is inserted between the socket head cap screw body 1 and the screw hole on the workpiece surface and deforms, that is, the rubber ring 8 acts as an elastic plug, thereby ensuring that the socket head cap screw body 1 and the screw hole on the workpiece surface are firmly screwed together. The push screw 11 is screwed into the interior of the mounting groove 4. The push screw 11 drives the truncated cone 13 to push the support block 10 along the slope 12. The support block 10 squeezes the rubber ring 8. The rubber ring 8 is tightly clamped between the support block 10 and the screw hole on the workpiece surface. That is, a hidden reinforcement structure is added from the inside of the socket head cap screw body 1 to ensure the firmness of the socket head cap screw body 1 after installation.

[0023] Instructions for using a high-tightening-force internal hexagon head screw: Prepare an internal hexagon head screw body 1, with an internal hexagonal groove 3 at its top. A rubber pad 2 (the rubber pad 2 is an L-shaped annular piece that is fitted and fixed on the stepped surface of the internal hexagon head screw body 1) is fitted on the shank. A rubber ring 8 (the rubber ring 8 is fitted and fixed in the outer annular groove 6 on the surface of the shank, and the inner annular surface of the rubber ring 8 has an inner annular groove 9) is also fitted on the shank. Two insertion holes 7 are opened on the surface of the screw groove 5, which connect the outer annular groove 6 and the screw groove 5. One end of the support block 10 is fixed in the inner annular groove 9, and the other end is inserted into the insertion hole 7. A push screw 11 is screwed into the screw groove 5, and the bottom end of the push screw 11 is integrally formed with a frustum 13. Using an Allen wrench compatible with the hex socket 3, align the hex socket head cap screw body 1 with the threaded hole on the workpiece surface, and tighten the Allen wrench to begin screwing the hex socket head cap screw body 1 into the threaded hole on the workpiece surface. Once the hex socket head cap screw body 1 is tightened, the rubber pad 2 is clamped between the top of the hex socket head cap screw body 1 and the workpiece, acting as an elastic washer to ensure a preliminary tight connection between the hex socket head cap screw body 1 and the threaded hole on the workpiece surface. Simultaneously, the rubber ring 8 is inserted between the hex socket head cap screw body 1 and the threaded hole on the workpiece surface, deforming to act as an elastic plug, further ensuring a secure connection between the hex socket head cap screw body 1 and the threaded hole on the workpiece surface. Prepare a screwdriver (such as a compatible screwdriver) compatible with the threaded slot 5 to tighten the screw. Insert the screw-tightening tool into the mounting groove 4, align the screw-tightening tool 11 with the threaded groove 5, and begin screwing the screw-tightening tool 11 into the mounting groove 4. As the screw-tightening tool 11 is screwed in, the frustum 13 at the bottom of the screw-tightening tool 11 pushes the support block 10 along the slope 12. After being pushed, the support block 10 moves towards the rubber ring 8 and squeezes the rubber ring 8, so that the rubber ring 8 is tightly clamped between the support block 10 and the threaded hole on the workpiece surface, thereby adding a hidden reinforcement structure from the inside of the hexagonal head screw body 1, ensuring the firmness of the hexagonal head screw body 1 after installation. If the screw needs to be removed, first insert the screw-tightening tool 11 into the mounting groove 4, and screw the screw-tightening tool 11 in the opposite direction, so that the screw-tightening tool 11 is unscrewed from the threaded groove 5, releasing the pushing force on the support block 10, and the rubber ring 8 regains some elasticity. Next, insert an Allen wrench into the Allen socket 3 and turn the Allen wrench in the opposite direction to unscrew the body 1 of the Allen socket head cap screw from the screw hole on the surface of the workpiece.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-tightening-force internal hexagon head screw, comprising an internal hexagon head screw body (1), wherein the top end of the internal hexagon head screw body (1) is provided with an internal hexagon groove (3), characterized in that: A rubber pad (2) is fitted and fixed on the rod of the internal hexagonal head screw body (1). A screw groove (5) is opened on the bottom surface of the internal hexagonal groove (3). A support block (10) is inserted into the screw groove (5). A rubber ring (8) is fitted on the rod of the internal hexagonal head screw body (1). One end of the support block (10) is fixed to the inner ring surface of the rubber ring (8). A push screw (11) is screwed into the screw groove (5). The push screw (11) pushes the support block (10) to tension the rubber ring (8).

2. The high-tightening-force internal hexagon socket head cap screw according to claim 1, characterized in that: The rubber pad (2) is an L-shaped annular piece, and the rubber pad (2) is fitted and fixed on the stepped surface of the body (1) of the internal hexagonal head screw.

3. The high-tightening-force internal hexagon socket head cap screw according to claim 1, characterized in that: The bottom surface of the internal hexagonal groove (3) is provided with an insert groove (4), the opening diameter of the insert groove (4) is larger than the opening diameter of the screw groove (5), and the top of the push screw (11) is located in the insert groove (4).

4. A high-tightening-force internal hexagon socket head cap screw according to claim 1, characterized in that: The body surface of the internal hexagonal head screw (1) is provided with an outer ring groove (6), which is an annular groove. A rubber ring (8) is sleeved and fixed in the outer ring groove (6), and an inner ring groove (9) is provided on the inner ring surface of the rubber ring (8).

5. A high-tightening-force internal hexagon socket head cap screw according to claim 4, characterized in that: The surface of the screw groove (5) has two insertion holes (7), which connect the outer ring groove (6) and the screw groove (5). The insertion holes (7) and the support blocks (10) correspond one-to-one. The support blocks (10) are inserted into the insertion holes (7), and one end of the support blocks (10) is fixed in the inner ring groove (9).

6. A high-tightening-force internal hexagon socket head cap screw according to claim 1, characterized in that: The other end of the support block (10) is provided with a push screw (11) on the top surface. The push screw (11) is screwed into the screw groove (5). The bottom end of the push screw (11) is integrally formed with a frustum (13).

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