CN219242417U

CN219242417U - Anti-loosening countersunk head screw

Info

Publication number: CN219242417U
Application number: CN202223091102.8U
Authority: CN
Inventors: 刘茂杏; 郭德安
Original assignee: YANGZHOU XINLENG MACHINERY MANUFACTURING CO LTD
Current assignee: YANGZHOU XINLENG MACHINERY MANUFACTURING CO LTD
Priority date: 2022-11-17
Filing date: 2022-11-17
Publication date: 2023-06-23
Anticipated expiration: 2032-11-17

Abstract

The utility model relates to a countersunk head screw, and discloses a looseness-preventing countersunk head screw, which comprises a screw body, wherein a rotating shaft is rotationally connected inside the screw body, a circular disc is arranged in an inner hexagonal opening, the circular disc is connected to the rotating shaft, a connecting block is connected below the screw body, a worm is arranged in the connecting block, the rotating shaft is coaxially connected with the worm, a worm wheel is also arranged in the connecting block, the worm wheel is meshed with the worm, a connecting shaft is fixedly arranged at the center of the worm wheel, two ends of the connecting shaft are provided with ejector rods, a sliding block is arranged on the ejector rods, a sliding groove is arranged in the connecting shaft, the sliding block is slidingly connected in the sliding groove, a threaded hole is formed in the side surface of the connecting block, and the front end of the ejector rod is in threaded connection with the threaded hole.

Description

Anti-loosening countersunk head screw

Technical Field

The utility model relates to a countersunk head screw, in particular to a loose-proof countersunk head screw.

Background

Countersunk screws are a common type of connection, and after installation, the head of the screw can be flush with the surface of the workpiece as much as possible to ensure that the surface of the workpiece is as smooth as possible.

In the chinese patent of the disclosure No. CN217440511U, a locking hexagon socket screw is disclosed, by setting a clamping block, when the socket screw body is installed in a screw hole, a spring ejects the clamping block, so that the clamping block is clamped in the screw hole, which can prevent the socket screw body from loosening or falling from the screw hole due to the impact, vibration and other conditions, but the position of the clamping block is very inconvenient to adjust from the side after the screw is installed, and simultaneously, both the two clamping blocks are independently controlled, and the elongation of the two clamping blocks cannot be controlled to be the same. In view of the above, the present utility model proposes a countersunk head screw that is resistant to loosening.

Disclosure of Invention

To solve the technical problems: the product of the Chinese patent publication No. CN217440511U is inconvenient to adjust the position of the clamping block from the side after the screw is installed, and meanwhile, the two clamping blocks are independently controlled, and the elongation of the two clamping blocks cannot be controlled to be the same.

The utility model provides a looseness-preventing countersunk head screw which comprises a screw body, wherein an inner hexagonal opening is formed in the top of the screw body, a rotating shaft is rotatably connected inside the screw body, a disc is arranged in the inner hexagonal opening and connected to the rotating shaft, a connecting block is connected below the screw body, a worm is arranged in the connecting block, the rotating shaft is coaxially connected with the worm, the worm can be driven to rotate through the rotating shaft, a worm wheel is further arranged in the connecting block, the worm wheel is meshed with the worm, a connecting shaft is fixedly arranged at the center of the worm wheel, ejector rods capable of moving back and forth in the connecting shaft are symmetrically arranged at two ends of the connecting shaft, sliding blocks are arranged on the ejector rods, linear sliding grooves are formed in the connecting shaft, the sliding blocks are slidably connected in the sliding grooves, threaded holes are formed in the side surfaces of the connecting block, and the front ends of the ejector rods are in threaded holes.

As a further improvement of the technical scheme, the disc is attached to the bottom side of the inner hexagonal opening, the distance between the disc and the top surface of the screw body is 0.45-2 cm, and the conventional countersunk head groove size is 0.45-2 cm according to the size of the screw according to the countersunk head screw size table, so that the distance between the disc and the top surface of the screw body should meet the standard.

As a further improvement of the technical scheme, the top of the screw body is provided with a groove, the groove adopts a straight groove, a cross groove or a rice-shaped groove, and the groove is used in cooperation with a screwdriver.

As a further improvement of the technical scheme, the connecting shaft is horizontally arranged, and the front end of the ejector rod is provided with a conical head.

As a further improvement of the technical scheme, the surface of the conical head is provided with spiral lines.

As a further improvement of the technical scheme, the size of the connecting block is smaller than that of the screw body.

The utility model has the technical effects and advantages that: according to the utility model, through the built-in worm and gear transmission, the disc is rotated above the countersunk head screw, so that the convenience in use is improved, and meanwhile, the pair of ejector rods are controlled to synchronously move through the rotating shaft, so that the pair of ejector rods can be controlled to uniformly extrude the inner walls of the screw holes, and the screw loosening caused by uneven stress is avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of the overall structure of the present utility model;

FIG. 2 is a schematic top view of the screw body of the present utility model;

fig. 3 is a schematic view of the ejector pin mounting structure of the present utility model.

Reference numerals illustrate:

10. a screw body; 11. an inner hexagonal opening;

20. a disc; 21. a rotating shaft; 22. a groove;

30. a connecting block; 31. a worm; 32. a worm wheel; 33. a connecting shaft; 34. a push rod; 35. a slide block; 36. a chute; 37. a conical head; 38. spiral lines.

Detailed Description

The utility model will be described in further detail with reference to the drawings and the detailed description. The embodiments of the utility model have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the utility model in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments were chosen and described in order to best explain the principles of the utility model and the practical application, and to enable others of ordinary skill in the art to understand the utility model for various embodiments with various modifications as are suited to the particular use contemplated.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Examples

Referring to fig. 1-3, the embodiment provides a locking countersunk head screw, which comprises a screw body 10, an inner hexagonal opening 11 is provided at the top of the screw body 10, a rotating shaft 21 is rotatably connected in the screw body 10, a disc 20 is arranged in the inner hexagonal opening 11, obviously, the disc 20 is arranged at the bottom of the inner hexagonal opening 11, the using space of the inner hexagonal opening 11 can be increased, an operator can conveniently rotate by using a corresponding screwdriver, the disc 20 is connected on the rotating shaft 21, a connecting block 30 is connected below the screw body 10, a worm 31 is arranged in the connecting block 30, the rotating shaft 21 is coaxially connected with the worm 31, the worm 31 can be driven to rotate by the rotating shaft 21, a worm wheel 32 is further arranged in the connecting block 30, the worm wheel 32 is meshed with the worm 31, a connecting shaft 33 is fixed at the center of the worm wheel 32, two ends of the connecting shaft 33 are symmetrically provided with ejector rods 34 which can move back and forth in the connecting shaft 33, a slide block 35 is arranged on the ejector rod 34, a linear slide groove 36 is arranged in the connecting shaft 33, the slide block 35 is slidably connected in the slide groove 36, a threaded hole is arranged on the side of the connecting block 30, and the front end of the screw is in the threaded hole.

In addition, considering that a sufficient working space needs to be reserved for the hexagonal screwdriver, the disc 20 is attached to the bottom side of the inner hexagonal opening 11, the distance between the disc 20 and the top surface of the screw body 10 is between 0.45 cm and 2 cm, and according to the counter-knowledge of the counter-sunk screw size table, the conventional counter-sunk groove size is between 0.45 cm and 2 cm according to the screw size, so that the distance between the disc 20 and the top surface of the screw body 10 should meet the standard.

Further, the top of the screw body 10 is provided with a groove 22, the groove 22 adopts a straight groove, a cross groove or a rice groove, the groove 22 is used in cooperation with a screwdriver, and the specific shape of the groove is not limited excessively.

Further, the connecting shaft 33 is horizontally arranged, the front end of the ejector rod 34 is provided with the conical head 37, when the workpiece is made of wood or other soft materials, the screw body 10 is more easy to loosen, at this time, the fixing degree of the screw body 10 can be greatly increased by penetrating the workpiece through the conical head 37, and the stability is improved.

In addition, the surface of the conical head 37 is provided with the spiral lines 38, and considering that the conical head 37 rotates, the spiral lines 38 are arranged on the surface of the conical head 37, so that the workpiece made of soft materials can be effectively drilled by rotation, and the efficiency of the conical head 37 penetrating into the workpiece is improved.

Further, the size of the connection block 30 is smaller than the size of the screw body 10, and the radius of the specific connection block 30 should be smaller than the radius of the screw body 10, so that after the connection block 30 enters the screw hole, a partial area is reserved between the connection block 30 and the screw hole to receive the scraps generated in the drilling process, so as to avoid the scraps blocking the rotation of the ejector rod 34.

When the anti-loosening countersunk head screw is used, the screw body 10 is normally fixed in a workpiece through the hexagonal screwdriver, then the disc 20 is rotated by the screwdriver matched with the groove 22 in shape, the rotating shaft 21, the worm 31, the worm wheel 32, the connecting shaft 33 and the ejector rod 34 are sequentially driven to rotate, the ejector rod 34 is simultaneously in threaded connection with the threaded hole of the connecting block 30, and the ejector rod 34 can move outwards along the connecting shaft 33 under the action of threaded connection during rotation until the ejector rod 34 contacts with the inner wall of the threaded hole, so that the fixing effect of the screw body 10 can be effectively improved.

It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art and which are included in the embodiments of the present utility model without the inventive step, are intended to be within the scope of the present utility model. Structures, devices and methods of operation not specifically described and illustrated herein, unless otherwise indicated and limited, are implemented according to conventional means in the art.

Claims

1. Anti-loosening countersunk head screw, comprising a screw body (10), characterized in that: the screw comprises a screw body (10), wherein an inner hexagonal opening (11) is formed in the top of the screw body (10), a rotating shaft (21) is connected to the inside rotation of the screw body (10), a disc (20) is arranged in the inner hexagonal opening (11), the disc (20) is connected to the rotating shaft (21), a connecting block (30) is connected to the lower portion of the screw body (10), a worm (31) is arranged in the connecting block (30), the rotating shaft (21) is coaxially connected with the worm (31), a worm wheel (32) is further arranged in the connecting block (30), the worm wheel (32) is meshed with the worm (31), a connecting shaft (33) is fixedly arranged at the center of the worm wheel (32), ejector rods (34) are symmetrically arranged at two ends of the connecting shaft (33), sliding blocks (35) are arranged on the ejector rods (34), sliding grooves (36) are formed in the connecting shaft (33), threaded holes are formed in the side faces of the connecting block (30), and the front ends of the ejector rods (34) are in threaded holes.

2. A loose-locking countersunk head screw as defined in claim 1, wherein: the disc (20) is attached to the bottom side of the inner hexagonal opening (11), and the distance between the disc (20) and the top surface of the screw body (10) is 0.45-2 cm.

3. A loose-locking countersunk head screw as defined in claim 1, wherein: the screw is characterized in that a groove (22) is formed in the top of the screw body (10), and the groove (22) is a straight groove, a cross groove or a rice groove.

4. A loose-locking countersunk head screw as defined in claim 1, wherein: the connecting shaft (33) is horizontally arranged, and the front end of the ejector rod (34) is provided with a conical head (37).

5. The anti-loosening countersunk screw, as defined in claim 4, wherein: spiral threads (38) are formed on the surface of the conical head (37).

6. The anti-loosening countersunk screw, as defined in claim 5, wherein: the size of the connecting block (30) is smaller than that of the screw body (10).