Inner hexagonal screw fastener

Abstract

The utility model discloses an inner hexagonal screw fastener, which relates to the technical field of screw fasteners and comprises a base plate, a main mounting screw is fixedly mounted at the bottom of the base plate, a screw head is fixedly mounted at the top of the base plate, and a countersunk hexagonal hole is formed in the top of the screw head. By the adoption of the structure, using flexibility of the adjusting mechanism is greatly improved, in the actual operation process, if a hexagon wrench is not matched with a bolt in specification, the adjusting shifting plate is twisted to drive the adjusting round block to enable the lead screw to rotate in the sliding groove, due to the fact that threads at the two ends of the lead screw are opposite in screwing direction, and the sliding block is driven to move in the sliding groove in a reciprocating mode during rotation; the limiting side plates are driven to change the distance, the hexagon wrench with the small size can be stably clamped, bolts can be disassembled and assembled when the wrench models are not matched, in addition, threads of the lead screw are dense, friction resistance is large during adjustment, locking resistance is formed to prevent the limiting side plates from loosening, operation of the wrench is more stable, and using convenience of a fastener is greatly improved.

Description

Technical Field

[0001] This utility model belongs to the field of screw fastener technology, and particularly relates to internal hexagonal screw fasteners. Background Technology

[0002] In modern industrial production and various engineering projects, hex socket head cap screws are used as a key connecting component in many fields such as machinery, construction, and electronics. With their unique structural design, the head is cylindrical with a regular hexagonal groove inside. When used with a suitable hex wrench, the screw part generates a tightening force by screwing into the nut or a threaded part, which can firmly connect different parts together and achieve a high-precision and high-strength fastening effect.

[0003] However, existing hex socket head cap screws have some obvious defects and shortcomings in practical applications. First, the size of hex socket head cap screws is fixed, which means that a specific size hex wrench must be used during tightening operations. This limitation leads to inconvenience, especially in some complex work scenarios, where it is necessary to frequently change different sizes of wrenches to deal with various specifications of hex socket head cap screws, greatly reducing work efficiency. More seriously, when the appropriate wrench is not available on site, even a small hex socket head cap screw cannot be used properly, which may force the entire workflow to be interrupted and delay the project schedule. In addition, in order to meet the tightening needs of hex socket head cap screws of different sizes, workers usually need to carry multiple hex socket head cap wrenches of different sizes, which not only increases the burden of carrying tools, but also easily leads to the loss or confusion of tools. In summary, existing hex socket head cap screws have many inconveniences in practical applications and urgently need to be improved in design to enhance their flexibility and convenience of use, and better meet the needs of modern industrial production and various engineering constructions. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide an internal hexagon screw fastener to solve the problem that the bolt cannot be disassembled when the internal hexagon wrench is not compatible due to the inconvenience of adjusting the screw head size during the application of the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] An internal hexagonal screw fastener includes a base plate, a main mounting screw is fixedly installed at the bottom of the base plate, a screw head is fixedly installed at the top of the base plate, a countersunk hexagonal hole is opened at the top of the screw head, an adjustment mechanism is provided inside the countersunk hexagonal hole, a hinge groove is opened on one side of the top of the screw head, an elastic top cover is provided inside the hinge groove, and the elastic top cover is disposed on the top of the screw head and covers the outside of the countersunk hexagonal hole;

[0007] The adjusting mechanism includes a slide groove, which is formed at the bottom of a countersunk hexagonal hole. A lead screw is rotatably connected inside the slide groove. The two ends of the lead screw have opposite threads. A slider is threaded to both ends of the lead screw. The slider is slidably connected inside the slide groove. A limiting side plate is fixedly installed on the top of the slider. The limiting side plate is movable on both sides inside the countersunk hexagonal hole. The end of the lead screw passes through a screw head.

[0008] As a preferred technical solution, an adjusting block is fixedly installed at the end of the lead screw through the screw head, and adjusting toggle plates are fixedly installed at equal intervals on the outer surface of the adjusting block.

[0009] As a preferred technical solution, the side shape of the slider and the internal cross-sectional shape of the groove are both set to a convex shape, and the inner side of the limiting side plate is fixedly connected with anti-slip protrusions at equal intervals.

[0010] As a preferred technical solution, the countersunk hexagonal hole has receiving grooves on both sides near the limiting side plate, and the limiting side plate is accommodated inside the receiving grooves.

[0011] As a preferred technical solution, the elastic top cover includes an elastic component, which is fixedly installed on both sides of the hinge groove. A rotating shaft is fixedly installed on the inner side of the elastic component, and a sealing cover is fixedly installed on the top of the rotating shaft. The sealing cover covers the top of the countersunk hexagonal hole.

[0012] As a preferred technical solution, a prying plate is fixedly installed in the middle of the side of the sealing cover away from the hinge groove, and a sealing gasket is provided at the bottom of the sealing cover.

[0013] As a preferred technical solution, the elastic component includes a sleeve, which is fixedly connected to both sides of the inner side of the hinge groove. A torsion spring is fixedly connected inside the sleeve, and a rotating block is fixedly installed on the inner side of the torsion spring. The rotating block is rotatably connected to the inner end of the sleeve, and the inner side of the rotating block is fixedly connected to the outer end of the rotating shaft.

[0014] In summary, the present invention has the following main advantages:

[0015] First, by setting an adjustment mechanism, this device can effectively improve the flexibility of use during operation. In actual operation, if the size of the hex wrench and the bolt are mismatched, the adjustment lever can be turned to drive the adjustment block to rotate, which in turn causes the lead screw to rotate in the slide groove. Since the threads at both ends of the lead screw turn in opposite directions, the rotation drives the slider to move back and forth in the slide groove, which simultaneously drives the limiting side plate at the top of the slider to move, thereby adjusting the distance between the two limiting side plates and achieving a stable clamping of the smaller size hex wrench. Even if the wrench model is not suitable, the bolt can be disassembled and assembled. Moreover, the dense threads of the lead screw result in high frictional resistance during adjustment, forming locking resistance to prevent the limiting side plates from loosening, making the wrench operation more stable and significantly improving the convenience of fastener use.

[0016] Secondly, this device features an elastic top cover, ensuring stable operation and convenient use. During use, the torsion spring inside the sleeve resets, pushing the rotating block to rotate. The rotating block drives the rotating shaft, causing the sealing cover to cover the top of the screw head, sealing the countersunk hexagonal hole and preventing dust and sand from entering the screw rod in the groove. This prevents the screw rod from becoming unable to rotate due to dirt or rust, ensuring the stability of the bolt. At the same time, the device adopts a latching plate design. Adjusting the latching plate can rotate the sealing cover, easily opening or sealing the countersunk hexagonal hole. This design not only ensures the normal operation of the screw rod but also facilitates the operation of the countersunk hexagonal hole during use, improving the overall user experience. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a front view structural diagram of the elastic top cover of this utility model in its disassembled state;

[0019] Figure 3 This is a top view of the retractable top cover of this utility model.

[0020] Figure 4 This is an enlarged structural diagram of the elastic top cover of this utility model in its disassembled state.

[0021] Reference numerals: 1. Base plate; 2. Main mounting screw; 3. Screw head; 4. Countersunk hexagonal hole; 5. Hinge groove; 6. Adjustment mechanism; 61. Slide groove; 62. Lead screw; 63. Slider; 64. Limiting side plate; 65. Adjusting block; 66. Adjusting toggle plate; 67. Anti-slip protrusion; 68. Receiving groove; 7. Elastic top cover; 71. Elastic component; 711. Sleeve; 712. Torsion spring; 713. Rotating block; 72. Rotating shaft; 73. Sealing cover; 74. Clamping plate. Detailed Implementation

[0022] Example

[0023] refer to Figures 1 to 4The internal hexagonal screw fastener of this embodiment includes a base plate 1. A main mounting screw 2 is fixedly installed at the bottom of the base plate 1, and a screw head 3 is fixedly installed at the top of the base plate 1. A countersunk hexagonal hole 4 is opened at the top of the screw head 3. An adjustment mechanism 6 is provided inside the countersunk hexagonal hole 4. A hinge groove 5 is opened on one side of the top of the screw head 3. An elastic top cover 7 is provided inside the hinge groove 5. The elastic top cover 7 is disposed on the top of the screw head 3 and covers the outside of the countersunk hexagonal hole 4.

[0024] The adjusting mechanism 6 includes a slide groove 61, which is formed at the bottom of the countersunk hexagonal hole 4. A lead screw 62 is rotatably connected inside the slide groove 61. The two ends of the lead screw 62 have opposite thread directions, and both ends of the lead screw 62 are threadedly connected to sliders 63. The sliders 63 are slidably connected inside the slide groove 61. A limiting side plate 64 is fixedly installed on the top of the slider 63. The limiting side plate 64 is movable on both sides inside the countersunk hexagonal hole 4. The end of the lead screw 62 passes through the screw head 3. When this internal hexagonal screw fastener is working, the base plate 1 connects the main mounting screw 2 and the screw head 3. The main mounting screw 2 is used for installation and fixation. When it is necessary to operate the screw, and the size of the hexagonal wrench used does not match the countersunk hexagonal hole 4 at the top of the screw head 3, the adjusting mechanism... When the adjustment mechanism 6 is activated, the operator can rotate the end of the lead screw 62. The lead screw 62 rotates in the groove 61 at the bottom of the countersunk hexagonal hole 4. Since the threads at both ends of the lead screw 62 turn in opposite directions, its rotation will drive the slider 63, which is threaded at both ends, to slide in the opposite direction in the groove 61. The limiting side plate 64 fixed on the top of the slider 63 moves on both sides inside the countersunk hexagonal hole 4, thereby adjusting the distance between the two limiting side plates 64. This allows the smaller hexagonal wrench to be firmly clamped in the countersunk hexagonal hole 4, enabling normal installation and removal of screws. In addition, the elastic top cover 7 in the hinge groove 5 at the top of the screw head 3 can cover the outside of the countersunk hexagonal hole 4, providing protection and preventing external impurities from entering and affecting the normal operation of the adjustment mechanism 6.

[0025] refer to Figures 2-3An adjusting block 65 is fixedly installed through the screw head 3 at the end of the lead screw 62. Adjusting toggle plates 66 are fixedly installed at equal intervals on the outer surface of the adjusting block 65. The side shape of the slider 63 and the internal cross-sectional shape of the groove 61 are both convex. Anti-slip protrusions 67 are fixedly connected at equal intervals on the inner side of the limiting side plate 64. Receiving grooves 68 are opened on both sides of the countersunk hexagonal hole 4 near the limiting side plate 64. The limiting side plate 64 is accommodated inside the receiving grooves 68. During the adjustment of this internal hexagonal screw fastener, when it is necessary to adapt a hexagonal wrench of a mismatched size, the user can rotate the adjusting block 65 fixedly connected to the end of the lead screw 62 by moving the adjusting toggle plates 66 installed at equal intervals on the outer surface of the adjusting block 65, thereby adjusting the screw head 62. The rod 62 rotates in the groove 61 at the bottom of the countersunk hexagonal hole 4. Since the threads at both ends of the lead screw 62 turn in opposite directions, the rotation will drive the slider 63, which is threaded to it, to slide in the opposite direction in the groove 61. The side shape of the slider 63 and the internal cross-section of the groove 61 are both convex, ensuring that the slider 63 slides stably in the groove 61 without coming out. As the slider 63 moves, the limiting side plate 64 fixed to the top of the slider 63 also moves synchronously. The anti-slip protrusion 67 on the inner side of the limiting side plate 64 can enhance the clamping stability of the hexagonal wrench. When the limiting side plate 64 moves into the receiving grooves 68 on both sides of the countersunk hexagonal hole 4, the distance between the two limiting side plates 64 can be precisely adjusted to achieve a stable clamping of hexagonal wrenches of different sizes, so as to meet the normal disassembly and assembly requirements of internal hexagonal screws.

[0026] refer to Figures 1-4The elastic top cover 7 includes an elastic component 71, which is fixedly installed on both sides of the hinge groove 5. A rotating shaft 72 is fixedly installed on the inner side of the elastic component 71, and a sealing cover 73 is fixedly installed on the top of the rotating shaft 72. The sealing cover 73 covers the top of the countersunk hexagonal hole 4. A latching plate 74 is fixedly installed in the middle of the side of the sealing cover 73 away from the hinge groove 5. A sealing gasket is provided at the bottom of the sealing cover 73. The elastic component 71 includes a sleeve 711, which is fixedly connected to both sides of the hinge groove 5. A torsion spring 712 is fixedly connected inside the sleeve 711. A rotating block 713 is fixedly installed on the inner side of the torsion spring 712. The rotating block 713 is rotatably connected to the inner end of the sleeve 711. The inner side of the rotating block 713 is fixedly connected to the outer end of the rotating shaft 72. The elastic component 71, which is fixedly installed on both sides of the hinge groove 5, plays a key role. The sleeve 711 in the elastic component 71... Connected to both sides of the hinge groove 5, the inner side of the torsion spring 712 fixed inside is connected to the rotating block 713. The rotating block 713 can rotate inside the sleeve 711. The inner side of the rotating block 713 is fixed to the outer end of the rotating shaft 72. The top of the rotating shaft 72 is also equipped with a sealing cover 73. Under normal conditions, the elasticity of the torsion spring 712 keeps the rotating block 713 rotating, which in turn drives the rotating shaft 72 and the sealing cover 73 to cover the top of the countersunk hexagonal hole 4. The sealing gasket at the bottom of the sealing cover 73 ensures good sealing and effectively prevents external impurities from entering. When it is necessary to operate the screw, the sealing cover 73 is moved by the lever 74 to overcome the elasticity of the torsion spring 712 and make the rotating block 713 rotate inside the sleeve 711, which drives the rotating shaft 72 and the sealing cover 73 to rotate, opening the countersunk hexagonal hole 4. After the operation is completed, the torsion spring 712 returns to its original position and pushes the sealing cover 73 to cover the countersunk hexagonal hole 4 again, realizing convenient sealing and opening functions.

[0027] Operating principle and advantages: This device, by setting an adjustment component, can significantly improve the flexibility and convenience of using this fastener. In actual operation, when the hex wrench and bolt specifications do not match, the operator can turn the adjustment lever 66 to drive the adjustment block 65 to rotate. The rotation of the adjustment block 65 drives the lead screw 62 to rotate synchronously in the slide groove 61. Since the threads at both ends of the lead screw 62 turn in opposite directions, the rotation of the lead screw 62 will drive the slider 63 to move back and forth in the slide groove 61. The movement of the slider 63 will then drive the limiting side plate 64 at its top to move synchronously. By adjusting the distance between the two limiting side plates 64, a smaller hex wrench can be firmly clamped.

[0028] This adjustable clamping and fixing method for the hex wrench allows for smooth installation and removal of the bolt even when the hex wrench model is incompatible. In addition, the thread design of the lead screw 62 is relatively dense, and the lead screw 62 generates greater frictional resistance during the adjustment of the hex wrench. This frictional resistance forms an effective locking resistance. Even if the slider 63 is simply squeezed, the lead screw 62 will not rotate, thus preventing the limiting side plate 64 from loosening. This ensures that the operator can stably operate the hex wrench to complete the installation and removal of the bolt, further improving the convenience of this fastener in use.

[0029] The elastic top cover 7 provides reliable stability and convenient operation for this device. During use, the torsion spring 712 inside the sleeve 711 resets and pushes the rotating block 713 to rotate. The rotating block 713 drives the rotating shaft 72 to rotate, which in turn causes the rotating shaft 72 to drive the sealing cover 73 to cover the top of the screw head 3, effectively blocking the countersunk hexagonal hole 4. In this way, the countersunk hexagonal hole 4 of the screw head 3 at the top of the main mounting screw 2 can remain closed during use, effectively preventing external dust, mud, and other impurities from entering the screw rod 62 inside the slide groove 61, preventing the screw rod 62 from failing to rotate normally due to mud or rust, thus ensuring the overall stability of the bolt. At the same time, this device adopts a locking plate 74 design. The operator only needs to adjust the locking plate 74 to rotate the sealing cover 73 and easily open the countersunk hexagonal hole 4. This design makes it easy to seal or open the countersunk hexagonal hole 4 during use, further improving the ease of use of the device.

Claims

1. An internal hexagonal screw fastener, comprising a base plate (1), characterized in that: The base plate (1) is fixedly installed with a main mounting screw (2) at the bottom and a screw head (3) is fixedly installed on the top of the base plate (1). The top of the screw head (3) is provided with a countersunk hexagonal hole (4). An adjustment mechanism (6) is provided inside the countersunk hexagonal hole (4). A hinge groove (5) is provided on one side of the top of the screw head (3). An elastic top cover (7) is provided inside the hinge groove (5). The elastic top cover (7) is located on the top of the screw head (3) and covers the outside of the countersunk hexagonal hole (4). The adjusting mechanism (6) includes a slide groove (61), which is opened at the bottom of the countersunk hexagonal hole (4). A lead screw (62) is rotatably connected inside the slide groove (61). The two ends of the lead screw (62) have opposite threads. Both ends of the lead screw (62) are threadedly connected to sliders (63). The sliders (63) are slidably connected inside the slide groove (61). A limiting side plate (64) is fixedly installed on the top of the slider (63). The limiting side plate (64) is movable on both sides inside the countersunk hexagonal hole (4). The end of the lead screw (62) passes through a screw head (3).

2. The internal hexagon socket screw fastener according to claim 1, characterized in that: An adjusting block (65) is fixedly installed at the end of the lead screw (62) through the screw head (3), and an adjusting toggle plate (66) is fixedly installed at equal intervals on the outer surface of the adjusting block (65).

3. The internal hexagon socket screw fastener according to claim 1, characterized in that: The side shape of the slider (63) and the internal cross-sectional shape of the groove (61) are both set to a convex shape, and the inner side of the limiting side plate (64) is fixedly connected with anti-slip protrusions (67) at equal intervals.

4. The internal hexagon socket screw fastener according to claim 1, characterized in that: The countersunk hexagonal hole (4) has receiving grooves (68) on both sides near the limiting side plate (64) inside, and the limiting side plate (64) is accommodated inside the receiving groove (68).

5. The internal hexagon socket screw fastener according to claim 1, characterized in that: The elastic top cover (7) includes an elastic component (71), which is fixedly installed on both sides of the hinge groove (5). A rotating shaft (72) is fixedly installed on the inner side of the elastic component (71), and a sealing cover (73) is fixedly installed on the top of the rotating shaft (72). The sealing cover (73) covers the top of the countersunk hexagonal hole (4).

6. The internal hexagonal socket screw fastener according to claim 5, characterized in that: A pry plate (74) is fixedly installed on the middle of the side of the sealing cover (73) away from the hinge groove (5), and a sealing gasket is provided at the bottom of the sealing cover (73).

7. The internal hexagon socket screw fastener according to claim 5, characterized in that: The elastic component (71) includes a sleeve (711) which is fixedly connected to both sides of the inside of the hinge groove (5). A torsion spring (712) is fixedly connected inside the sleeve (711). A rotating block (713) is fixedly installed on the inner side of the torsion spring (712). The rotating block (713) is rotatably connected to the inner end of the sleeve (711). The inner side of the rotating block (713) is fixedly connected to the outer end of the rotating shaft (72).

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