Self-tapping and self-drilling screw
By designing a combined structure of side holes, pins, lock plates and thimble rods in the self-tapping and self-drilling screws, the problem of the lack of self-tapping and self-drilling screws is solved, and the self-locking effect is achieved, enhancing the stability and practicality of the connection.
Patent Information
- Application Number
- CN202421736200.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The existing self-tapping and self-drilling screws lack self-locking function, which makes them prone to loosening after connection.
A self-tapping and self-drilling screw is designed, which has a side hole and a pin shaft on the self-tapping screw body, and a lock plate and a thimble rod are provided in the side holes. Through the insertion of the thimble rod and the rotation of the lock plate, a self-locking effect is formed.
The self-locking function of self-tapping and drilling screws is realized to prevent loosening and enhance the stability and practicality of the connection.
Smart Images
Figure CN222910485U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fasteners, and more specifically, it relates to a self-tapping and self-drilling screw. Background Art
[0002] Most of the self-tapping and self-drilling screws on the market have a drill tail that can self-tap and screw teeth for punching holes. The self-tapping effect is good, but they do not have a self-locking function and can be unscrewed by reverse rotation. Accordingly, the utility model provides a self-tapping and self-drilling screw. Content of the Utility Model
[0003] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and provide a self-tapping and self-drilling screw, which has the characteristics of self-tapping and self-drilling and can be self-locked.
[0004] To solve the above technical problems, the purpose of the utility model is realized as follows: A self-tapping and self-drilling screw according to the utility model includes a self-tapping screw body with an external hexagonal rotating head at one end and a drill tail at the other end. A side hole extending radially and penetrating the self-tapping screw body is provided on the self-tapping screw body. A pin shaft is provided in the side hole, and the axis of the pin shaft is perpendicular to the axis of the self-tapping screw body. A locking plate arranged in the side hole is rotatably connected to the pin shaft. A thimble hole is provided on the side of the side hole facing the external hexagonal rotating head and is opened on the self-tapping screw body. A thimble rod with one end abutting against the locking plate and the other end extending out of the thimble hole is embedded in the thimble hole. One end of the locking plate is close to the external hexagonal rotating head and the other end is close to the drill tail, and the end of the thimble rod abutting against the locking plate is close to the external hexagonal rotating head.
[0005] The utility model is further arranged as: Teeth are arranged at both ends of the locking plate.
[0006] The utility model is further arranged as: The thimble hole is obliquely arranged.
[0007] The utility model is further arranged as: The axis of the thimble hole forms an angle of 15° to 30° with the axis of the self-tapping screw body.
[0008] The utility model is further arranged as: The axis of the thimble hole forms an angle of 20° with the axis of the self-tapping screw body.
[0009] The utility model is further arranged as: The locking plate is composed of a driving plate arranged on one side of the pin shaft and a driven plate arranged on the other side of the pin shaft, and the length of the driven plate is greater than the length of the driving plate.
[0010] In summary, the utility model has the following beneficial effects: The self-tapping and self-drilling screw involved in the utility model, by hammering and screwing the thimble rod on the screw to further insert it into the thimble hole to impact the locking plate until the locking plate rotates, so that both ends thereof extend out of the side holes and are clamped into the connected parts to form a self-locking effect, preventing loosening and backstepping. The overall function is perfect and the practicability is strong. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 is a schematic diagram of the overall structure of the utility model;
[0012] Figure 2 is a schematic diagram of the structure of the utility model from another perspective;
[0013] Figure 3 is a schematic diagram of a partial structure of the utility model;
[0014] Figure 4 is a schematic diagram of a local structure of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0015] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the preferred implementation solutions of the present utility model will be described below in conjunction with specific embodiments. However, it should be understood that these descriptions are only for further explaining the features and advantages of the present utility model, rather than limiting the patent requirements of the present utility model. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0016] The present utility model will be further described below in conjunction with the drawings and preferred embodiments.
[0017] Embodiment 1
[0018] Referring to Figures 1 to 4 as shown, a self-tapping and self-drilling screw involved in this embodiment includes a self-tapping screw body 3 with an external hexagonal rotating head 1 at one end and a drill tail 2 at the other end. A side hole 4 extending radially and penetrating the self-tapping screw body is provided on the self-tapping screw body 3. A pin shaft 5 is provided in the side hole 4, and the axis of the pin shaft 5 is perpendicular to the axis of the self-tapping screw body 3. A locking plate 6 provided in the side hole 4 is rotatably connected to the pin shaft 5. A thimble hole 7 is provided on the self-tapping screw body on the side of the side hole 4 facing the external hexagonal rotating head. A thimble rod 8 with one end abutting against the locking plate and the other end extending out of the thimble hole is embedded in the thimble hole 7. One end of the locking plate 6 is close to the external hexagonal rotating head 1, and the other end is close to the drill tail 2. The thimble rod 8 abuts against one end of the locking plate 6 close to the external hexagonal rotating head 1.
[0019] Further, teeth 9 are arranged at both ends of the locking plate 6.
[0020] Furthermore, the thimble hole 7 is arranged obliquely; the axis of the thimble hole 7 forms an angle of 20° with the axis of the self-tapping screw body 3.
[0021] In this embodiment, first, in the initial state of the locking plate 6, the locking plate 6 is inclined and integrally hidden in the side hole 4. At this time, the screw is self-tapped and screwed. Then, the thimble rod 8 extending out of the thimble hole 7 at one end is hammered until the thimble rod 8 is further inserted into the thimble hole 7. During this period, the locking plate 6 is impacted to make it rotate until both ends of the locking plate 6 extend out of the side hole 4 and are clamped with the connected part, achieving the effect of preventing loosening and back-off.
[0022] Among them, the setting of the teeth 9 is used to increase the friction and biting effect.
[0023] Among them, by obliquely arranging the thimble hole 7, it is convenient to hammer the thimble rod 8 while driving the locking plate 6 to rotate, which helps to completely transmit the force.
[0024] Embodiment 2
[0025] See Figures 1 to 4 As shown, a self-tapping and self-drilling screw involved in this embodiment is further provided on the basis of Embodiment 1. The locking plate 6 is composed of a driving plate 61 provided on one side of the pin shaft 5 and a driven plate 62 provided on the other side of the pin shaft 5, and the length of the driven plate 62 is greater than the length of the driving plate 61.
[0026] In this embodiment, by setting the length of the driven plate 62 to be greater than the length of the driving plate 61, when the screw is vertically installed, even if the locking plate 6 can rotate freely, the end of its driven plate 62 can droop due to its weight, so that the locking plate 6 is completely hidden in the side hole 4 in the natural state.
[0027] The self-tapping and self-drilling screw involved in the present invention forms a self-locking effect, prevents loosening and back-off by hammering the thimble rod on the screw completed by self-tapping and screwing, so that it is further inserted into the thimble hole to impact the locking plate until the locking plate rotates and both ends of it extend out of the side hole and are clamped into the connected part. The overall function is perfect and the practicability is strong.
[0028] Unless otherwise specified, in this utility model, if there are terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial direction", "radial direction", "circumferential direction", etc., the orientation or positional relationship indicated is based on the actual orientation or positional relationship shown. It is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms used to describe the orientation or positional relationship in this utility model are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood in combination with the embodiments and according to the specific circumstances.
[0029] Unless otherwise clearly specified and defined, in this utility model, if there are terms such as "arranged", "connected" and "coupled", they shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.
[0030] The preferred specific embodiments of this utility model have been described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and variations based on the concept of this utility model without creative work. Therefore, all technical solutions that can be obtained by those skilled in the art in the technical field of this application through logical analysis, reasoning or limited experiments based on the concept of this utility model on the basis of the existing technology shall fall within the protection scope determined by the claims.
Claims
1. A self-drilling screw, comprising a self-drilling screw body having an external hexagonal screw head at one end and a drill tail at the other end, characterized in that: The self-tapping screw body is provided with a side hole extending radially and penetrating the self-tapping screw body, a pin is provided in the side hole, the axis of the pin is kept perpendicular to the axis of the self-tapping screw body, a locking plate arranged in the side hole is rotatably connected to the pin, a thimble hole provided in the self-tapping screw body is provided on the side of the side hole facing the external hexagonal rotating head, a thimble rod with one end against the locking plate and the other end extending out of the thimble hole is embedded in the thimble hole; one end of the locking plate is close to the external hexagonal rotating head and the other end is close to the drill tail, and one end of the thimble rod against the locking plate is close to the external hexagonal rotating head.
2. The self-drilling screw according to claim 1, characterized in that: Both ends of the locking plate are provided with teeth.
3. The self-drilling screw according to claim 1 or 2, characterized in that: The ejector pin holes are arranged obliquely.
4. The self-drilling screw according to claim 3, characterized in that: The axis of the ejector pin hole forms an angle of 15° to 30° with the axis of the self-tapping screw body.
5. The self-drilling screw according to claim 4, characterized in that: The axis of the ejector hole forms an angle of 20° with the axis of the self-tapping screw body.
6. The self-drilling screw according to claim 1, characterized in that: The locking plate is composed of an active plate arranged on one side of the pin shaft and a driven plate arranged on the other side of the pin shaft, and the length of the driven plate is greater than that of the active plate.