Cross recessed screw with inner cavity

Abstract

The cross recessed screw comprises a threaded rod, a connecting rod is arranged above the threaded rod, a screw head is arranged above the connecting rod, a mounting groove is formed in the middle of the upper portion of the screw head, a movable block is arranged in the mounting groove, a cavity is formed in the middle, located below the mounting groove, of the connecting rod, and the movable block is arranged in the cavity. A pressing rod matched with the cavity is arranged in the middle of the lower portion of the movable block, through holes are formed in the two sides of the lower end of the connecting rod, positioning rods are arranged in the through holes, inner cross-shaped sinking grooves which are communicated with each other are formed in the screw head and the short middle of the movable block, and outer threads are arranged on the outer side of the movable block. And internal threads matched with the external threads are arranged on the inner wall of the mounting groove. The screw is simple in structure, the connecting stability of the screw and the connecting piece is good, the screw and the connecting piece can be fastened from multiple aspects, and the practicability of the screw is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a cross-grooved screw with an internal cavity. Background Technology

[0002] A screw is a part used in construction machinery. It is a type of threaded part with a small, cylindrical or conical metal rod, pointed at the end like a nail, and has a slotted or recessed head. A cross-head screw with an internal cavity is a type of cross-head screw device. Currently, many cross-head screws on the market, when used for snap-fit ​​connections with external devices, fail to effectively improve the stability of the connection between the screw and the external device. This makes the screw highly susceptible to interference from the external environment, causing the device to detach and significantly affecting its normal use. Therefore, we propose a cross-head screw with an internal cavity. Utility Model Content

[0003] To address the aforementioned problems, this invention provides a cross-head screw with an internal cavity. This invention solves the problem that many cross-head screws on the market fail to effectively improve the stability of the connection between the screw and the external device when making snap-fit ​​connections. This makes the screw highly susceptible to external environmental interference, causing the device to detach and significantly affecting its normal operation.

[0004] This utility model discloses a cross-shaped groove screw with an internal cavity, comprising a threaded rod, a connecting rod above the threaded rod, a screw head above the connecting rod, an installation groove in the middle of the upper part of the screw head, a movable block inside the installation groove, a cavity in the middle of the lower part of the connecting rod below the installation groove, a pressure rod matching the cavity in the middle of the lower part of the movable block, through holes on both sides of the lower end of the connecting rod, a positioning rod inside the through holes, and a connected internal cross-shaped groove in the middle of the upper part of the screw head and the movable block, an external thread on the outer side of the movable block, and an internal thread matching the external thread on the inner wall of the installation groove.

[0005] In the above scheme, the threaded rod and the connecting rod are an integral structure.

[0006] In the above scheme, sliders are provided on both sides of the positioning rod, and a guide groove matching the slider is opened on the side wall of the through hole of the connecting rod. The side of the slider away from the cavity is fixedly connected to the side wall of the guide groove by a spring.

[0007] In the above scheme, the end of the positioning rod away from the cavity is provided with anti-slip texture.

[0008] In the above scheme, the lower end of the pressure rod is tapered, and the positioning rod has an inclined surface on the side near the pressure rod that matches the tapered cross section.

[0009] The advantages and beneficial effects of this utility model are as follows: This utility model provides a cross-grooved screw with an inner cavity. A movable block moves vertically within the mounting groove, driving a pressure rod to move. The pressure rod presses against a positioning rod, causing the positioning rod to move away from the cavity and outwards from the connecting rod. This results in mutual pressure between the positioning rod and the connecting member, further improving the stability of the connection between the screw and the connecting member. When the pressure rod no longer presses against the positioning rod, the slider can automatically reset the positioning rod under the action of the spring force. This screw has a simple structure, is easy to operate, and provides good stability in the connection between the screw and the connecting member. It can fasten the screw and the connecting member from multiple aspects, effectively improving the practicality of the screw. Attached Figure Description

[0010] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] Figure 2 This is a cross-sectional view of the present invention;

[0013] Figure 3 This is a schematic diagram of part A of the present invention.

[0014] In the diagram: 1. Threaded rod; 2. Connecting rod; 3. Screw head; 4. Mounting slot.

[0015] 5. Movable block; 6. Cavity; 7. Pressure rod; 8. Through hole

[0016] 9. Positioning rod; 10. Inner cross countersunk groove; 11. Slider; 12. Guide groove

[0017] 13. Spring 14. Anti-slip texture 15. External thread 16. Internal thread. Detailed Implementation

[0018] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0019] like Figure 1-3As shown, this utility model is a cross-head screw with an internal cavity, including a threaded rod 1, a connecting rod 2 above the threaded rod 1, a screw head 3 above the connecting rod 2, an installation groove 4 in the middle of the upper part of the screw head 3, a movable block 5 inside the installation groove 4, the movable block 5 can move vertically inside the installation groove 4, a cavity 6 is located in the middle of the lower part of the connecting rod 2 below the installation groove 4, a pressure rod 7 matching the cavity 6 is located in the middle of the lower part of the movable block 5, and through holes 8 are provided on both sides of the lower end of the connecting rod 2, with positioning rods 9 inside the through holes 8. When the movable block 5 moves vertically, the movable block 5 drives the pressure rod 7 to move vertically, and the pressure rod 7 squeezes the positioning rod 9, causing the positioning rod 9 to move away from the cavity 6. The positioning rod 9 moves towards the connecting rod 2. The outward movement causes the positioning rod 9 and the connecting piece to press against each other, thereby further improving the stability of the connection between the screw and the connecting piece through the mutual cooperation between the positioning rod 9 and the connecting piece. The screw head 3 and the short middle part of the movable block 5 are provided with a connected inner cross countersunk groove 10. The movable block 5 can be rotated independently through the inner cross countersunk groove 10 above the movable block 5, and the screw can be rotated through the inner cross countersunk groove 10 above the screw head 3. The movable block 5 is provided with an external thread 15 on its outer side, and the inner wall of the mounting groove 4 is provided with an internal thread 16 that matches the external thread 15. The external thread 15 on the outer side of the movable block 5 is threadedly connected to the internal thread 16 on the inner wall of the mounting groove 4. Through the mutual cooperation between the external thread 15 and the internal thread 16, the movable block 5 can move vertically in the mounting groove 4.

[0020] The threaded rod 1 and the connecting rod 2 are an integral structure.

[0021] Both sides of the positioning rod 9 are provided with sliders 11. The connecting rod 2 has a guide groove 12 on the side wall of the through hole 8 that matches the slider 11. The side of the slider 11 away from the cavity 6 is fixedly connected to the side wall of the guide groove 12 by a spring 13. The slider 11 can slide inside the guide groove 12. Through the cooperation between the slider 11 and the guide groove 12, the movement stability of the positioning rod 9 is effectively improved. When the movable block 5 moves upward, the pressure rod 7 no longer squeezes the positioning rod 9. Under the action of the spring force of the spring 13, the slider 11 can push the positioning rod 9 to automatically reset.

[0022] The positioning rod 9 is provided with anti-slip texture 14 at the end away from the cavity 6. The anti-slip texture 14 effectively increases the friction between the positioning rod 9 and the contact surface of the connector, thereby further increasing the connection stability between the positioning rod 9 and the connector.

[0023] The lower end of the pressure rod 7 is tapered, and the positioning rod 9 has an inclined surface that matches the tapered cross section on the side near the pressure rod 7. The cooperation between the tapered cross section and the inclined surface makes it easier for the pressure rod 7 to push the positioning rod 9.

[0024] Specifically, in this utility model, the movable block 5 can be rotated independently through the inner cross countersunk groove 10 above the movable block 5, and the screw can be rotated through the inner cross countersunk groove 10 above the screw head 3. When the movable block 5 is rotated, it moves vertically inside the mounting groove 4. The movable block 5 drives the pressure rod 7 to move, and the pressure rod 7 presses against the positioning rod 9, causing the positioning rod 9 to move away from the cavity 6 and move outward from the connecting rod 2, so that the positioning rod 9 and the connecting member press against each other. Thus, through the mutual cooperation between the positioning rod 9 and the connecting member, the stability of the connection between the screw and the connecting member is further improved. The slider 11 can slide inside the guide groove 12. Through the mutual cooperation between the slider 11 and the guide groove 12, the movement stability of the positioning rod 9 is effectively improved. When the movable block 5 moves upward, the pressure rod 7 no longer presses against the positioning rod 9. Under the action of the spring force of the spring 13, the slider 11 can push the positioning rod 9 to automatically reset.

[0025] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cross-grooved screw with an inner cavity, comprising a threaded shank (1), characterized in that, A connecting rod (2) is provided above the threaded rod (1), a screw head (3) is provided above the connecting rod (2), an installation groove (4) is provided in the middle of the upper part of the screw head (3), a movable block (5) is provided in the installation groove (4), a cavity (6) is provided in the middle of the lower part of the connecting rod (2) below the installation groove (4), a pressure rod (7) matching the cavity (6) is provided in the middle of the lower part of the movable block (5), through holes (8) are provided on both sides of the lower end of the connecting rod (2), a positioning rod (9) is provided in the through hole (8), an internal cross countersunk groove (10) is provided in the middle of the upper part of the screw head (3) and the movable block (5), an external thread (15) is provided on the outer side of the movable block (5), and an internal thread (16) matching the external thread (15) is provided on the inner wall of the installation groove (4).

2. A cross-shaped screw with an inner cavity according to claim 1, characterized in that, The threaded rod (1) and the connecting rod (2) are an integral structure.

3. A cross-shaped screw with an inner cavity according to claim 1, characterized in that, The positioning rod (9) is provided with sliders (11) on both sides. The connecting rod (2) is provided with a guide groove (12) matching the slider (11) on the side wall of the through hole (8). The slider (11) is fixedly connected to the side wall of the guide groove (12) by a spring (13) on the side away from the cavity (6).

4. A cross-shaped screw with an inner cavity according to claim 1, characterized in that, The positioning rod (9) has anti-slip texture (14) at the end away from the cavity (6).

5. A cross-shaped screw with an inner cavity according to claim 1, characterized in that, The lower end of the pressure rod (7) is tapered, and the positioning rod (9) has an inclined surface on the side near the pressure rod (7) that matches the tapered cross section.

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