Double-section thread rolling self drilling screw

Abstract

The utility model relates to a double-section thread rolling self-drilling screw and aims to solve the technical problems that a thread section of the double-section thread rolling self-drilling screw is integrally formed, a drill bit is stressed firstly, so that the drill bit is very easy to abrade, the whole thread section needs to be replaced in order not to influence next use after the drill bit is abraded, and the replacement cost is increased, and the double-section thread rolling self-drilling screw comprises a self-drilling screw body, a group of limiting structures are symmetrically arranged in the upper end of the self drilling screw body; the self drilling screw body comprises a screw head, a first threaded section is fixedly connected to the bottom of the screw head, and a second threaded section is attached to the bottom of the first threaded section. According to the self drilling screw, the integrally-formed threaded section is changed into the detachable threaded section, local disassembly and replacement of the threaded section of the self drilling screw body are effectively achieved, and the replacement cost is reduced; and through matched clamping between the limiting rod and the through hole and matched clamping between the guide rod and the guide groove, rapid assembly between the first threaded section and the second threaded section is facilitated, and the assembly efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a drill screw technical field especially relates to a double section thread rolling drill screw. BACKGROUND

[0002] Screw is the physical and mathematical principle of using the inclined plane circular rotation and friction of object, gradually tightens the tool of machine part. Drill screw is the screw front end has the self tapping drill hole head screw, also called self drilling screw. In order to improve the firmness and stability of drill screw connection, developed double section thread rolling drill screw, is in the surface of screw sets up two different pitch thread connection groove.

[0003] Patent No. CN217207220U discloses a double section thread rolling drill screw, solves the length of the existing double section thread rolling drill screw fixed, can not satisfy different use demand's problem, it includes screw body and lifting adjusting nut, the lifting adjusting nut is installed at the top of screw body, screw body includes tight thread end and standard thread end, the tight thread end is connected with the standard thread end between the taper connecting section, the bottom of standard thread end is connected with drill bit, the surface of drill bit is provided with self tapping groove;The double section thread rolling drill screw can adjust the length in the process of using, so that the screw can satisfy the use demand of different length, and the length of screw adjustment is simple and convenient, and is stable and reliable, the adjusted screw does not affect the safe and effective use, therefore, the double section thread rolling drill screw can satisfy the use demand of people.

[0004] However, the double section thread rolling drill screw still has the following disadvantages:

[0005] The thread section of the double section thread rolling drill screw is integrally formed, the drill bit is most easily worn out due to the first stress, and the whole thread section needs to be replaced after the drill bit is worn out to avoid affecting the next use, which increases the replacement cost. UTILITY MODEL CONTENTS

[0006] The utility model discloses a double section thread rolling drill screw to overcome the insufficient of prior art, adapt to the reality needs, to solve the thread section of the double section thread rolling drill screw integrally formed, the drill bit is most easily worn out due to the first stress, and the whole thread section needs to be replaced after the drill bit is worn out to avoid affecting the next use, which increases the replacement cost.

[0007] In order to realize the utility model's purpose, the technical scheme that the utility model adopts is as follows: a double section thread rolling drill screw is designed, including drill screw body, a group of limit structures are symmetrically arranged in the inside of the upper end of the drill screw body;

[0008] The drill screw body comprises a screw head, a first threaded segment is fixedly connected at the bottom of the screw head, a second threaded segment is attached to the bottom of the first threaded segment, a drill bit is arranged at the bottom of the second threaded segment, a limiting rod is fixedly connected to the middle top of the second threaded segment, a group of guide rods are symmetrically arranged on both sides of the limiting rod, a through hole is formed in the middle of the first threaded segment, and a group of guide grooves are symmetrically arranged on both sides of the through hole.

[0009] Preferably, the second threaded segment is integrally formed between the drill bit, the limiting rod and the guide rod are fixedly connected with the second threaded segment.

[0010] Preferably, the second threaded segment is integrally formed between the drill bit, the limiting rod and the guide rod are fixedly connected with the second threaded segment.

[0011] Preferably, the second threaded segment is integrally formed between the drill bit, the limiting rod and the guide rod are fixedly connected with the second threaded segment.

[0012] Preferably, the second threaded segment is integrally formed between the drill bit, the limiting rod and the guide rod are fixedly connected with the second threaded segment.

[0013] Preferably, the second threaded segment is integrally formed between the drill bit, the limiting rod and the guide rod are fixedly connected with the second threaded segment.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] 1. The threaded segment of the utility model is integrally formed, and the threaded segment can be assembled and disassembled, so that the threaded segment of the drill screw body can be locally disassembled and replaced, the replacement cost is reduced, the matching and clamping between the limiting rod and the through hole and the matching and clamping between the guide rod and the guide groove facilitate the quick assembly between the first threaded segment and the second threaded segment, and the assembly efficiency is improved.

[0016] 2. When the threaded segment of the drill screw body needs to be locally disassembled, the supporting rod is pulled outward by a tool, at this time, the clamping rod and the limiting ring plate effectively translate, the limiting ring plate extrudes the spring, at the same time, the end of the clamping rod is away from the inside of the limiting rod, at this time, the limiting rod is not constrained, and the second threaded segment can be directly pulled downward to move the limiting rod out of the inside of the screw head and the first threaded segment, at this time, the first threaded segment and the second threaded segment are separated, and the drill bit at the bottom of the second threaded segment can be disassembled and replaced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 The exploded structure schematic view of the utility model is shown in the figure;

[0019] Figure 3 The exploded structure schematic view of the utility model is shown in the figure;

[0020] Figure 4 The local section structure schematic view of the utility model is shown in the figure;

[0021] Figure 5 The utility model discloses a Figure 4 The local enlarged structure schematic view of the utility model is shown in the figure;

[0022] In the figure: 1, drill screw body; 2, limiting structure;

[0023] 101, screw head; 102, first threaded section; 103, second threaded section; 104, drill bit; 105, limiting rod; 106, guide rod; 107, through hole; 108, guide slot;

[0024] 201, limiting slot; 202, clamping rod; 203, limiting ring plate; 204, spring; 205, slot frame; 206, supporting rod. DETAILED DESCRIPTION

[0025] The utility model is further illustrated in connection with the drawings and embodiments as follows:

[0026] A double-section thread rolling drill screw, referring to Figures 1 to 5 , including drill screw body 1, and a set of limiting structures 2 are symmetrically arranged in the interior of the upper end of drill screw body 1;

[0027] The drill screw body 1 includes a screw head 101, the bottom of the screw head 101 is fixedly connected with a first threaded segment 102, the bottom of the first threaded segment 102 is attached with a second threaded segment 103, the bottom of the second threaded segment 103 is provided with a drill bit 104, the top of the second threaded segment 103 is fixedly connected with a limiting rod 105 in the middle, a group of guide rods 106 are symmetrically arranged on both sides of the limiting rod 105, wherein the second threaded segment 103 is integrally formed between the second threaded segment 103 and the drill bit 104, the limiting rod 105 and the guide rod 106 are fixedly connected with the second threaded segment 103, a through hole 107 is formed in the middle of the first threaded segment 102, a group of guide grooves 108 are symmetrically distributed on both sides of the through hole 107, further, the second threaded segment 103 forms a clamping structure with the limiting rod 105, the guide rod 106, the through hole 107 and the guide groove 108, and the limiting rod 105 penetrates the inside of the first threaded segment 102 and the top of the limiting rod 105 is clamped in the inside of the screw head 101. The threaded segment of the drill screw body 1 is effectively realized by changing the integrally formed threaded segment into an assembled and disassembled threaded segment, the replacement cost is reduced, the matching clamping between the limiting rod 105 and the through hole 107 and the matching clamping between the guide rod 106 and the guide groove 108 facilitate the quick assembly between the first threaded segment 102 and the second threaded segment 103, and the assembly efficiency is improved.

[0028] It is worth noting that the limiting structure 2 includes a limiting groove 201, a group of limiting grooves 201 are symmetrically arranged in the inside of the screw head 101, a clamping rod 202 penetrates the inside of the limiting groove 201, a limiting ring plate 203 is fixedly sleeved on the outside of the clamping rod 202, wherein a clamping groove matched with the end of the clamping rod 202 is formed in the inside of the limiting rod 105, the end of the clamping rod 202 close to the limiting ring plate 203 is clamped in the inside of the limiting rod 105, a spring 204 is movably sleeved on the outside of the clamping rod 202, further, the limiting ring plate 203 forms an elastic structure with the limiting groove 201 through the spring 204, the outer wall of the limiting ring plate 203 is attached with the inner wall of the limiting groove 201, a groove frame 205 is fixedly connected with the inside of the limiting rod 105, and a supporting rod 206 is fixedly connected with the inside of the groove frame 205. When the threaded segment of the drill screw body 1 needs to be partially disassembled, the supporting rod 206 is pulled outward by a tool, at this time, the clamping rod 202 and the limiting ring plate 203 effectively translate, the limiting ring plate 203 extrudes the spring 204, and the end of the clamping rod 202 is away from the inside of the limiting rod 105, at this time, the limiting rod 105 is not constrained and can directly pull down the second threaded segment 103 to move the limiting rod 105 out of the inside of the screw head 101 and the first threaded segment 102, at this time, the first threaded segment 102 is separated from the second threaded segment 103, and the drill bit 104 at the bottom of the second threaded segment 103 can be disassembled and replaced.

[0029] Working principle: when the threaded segment of the drill tail screw body 1 needs to be partially disassembled, the support rod 206 is pulled outward by the tool, at this time the clamping rod 202 and the limiting ring plate 203 are translated, the limiting ring plate 203 extrudes the spring 204, at the same time the end of the clamping rod 202 is away from the inside of the limiting rod 105, at this time the limiting rod 105 is not constrained, and can directly pull down the second threaded segment 103 to move the limiting rod 105 out of the inside of the screw head 101 and the first threaded segment 102, at this time the first threaded segment 102 and the second threaded segment 103 are separated, the bottom drill bit 104 of the second threaded segment 103 can be disassembled and replaced, after the second threaded segment 103 and the drill bit 104 are replaced, the first threaded segment 102 and the new second threaded segment 103 are quickly assembled through the matching clamping between the limiting rod 105 and the through hole 107 and the matching clamping between the guide rod 106 and the guide groove 108, at the same time, on the basis of the outward movement of the support rod 206, the top end of the limiting rod 105 is inserted into the inside of the screw head 101, then the support rod 206 is loosened, under the influence of the spring 204 rebound force, the end of the clamping rod 202 is clamped into the inside of the limiting rod 105, the limiting rod 105 is constrained, and the assembly of the drill tail screw body 1 is realized.

[0030] The embodiments of the utility model discloses the preferable embodiment, but is not limited to this, the ordinary skill of the art, the spirit of the utility model is appreciated to the above-mentioned embodiment, and different extension and change are made, but as long as not departing from the spirit of the utility model, are in the protection scope of the utility model.

Claims

1. A two-step threading tap, characterized by, Including the drill screw body (1), a group of limit structures (2) are arranged symmetrically in the upper end inside of the drill screw body (1); The drill screw body (1) includes a screw head (101), the bottom of the screw head (101) is fixedly connected with a first threaded segment (102), the bottom of the first threaded segment (102) is attached with a second threaded segment (103), the bottom of the second threaded segment (103) is provided with a drill bit (104), the top middle end of the second threaded segment (103) is fixedly connected with a limiting rod (105), a group of guide rods (106) are symmetrically arranged on both sides of the limiting rod (105), a through hole (107) is formed in the middle end of the inside of the first threaded segment (102), and a group of guide grooves (108) are symmetrically distributed on both sides of the through hole (107).

2. A two-step threading tap as defined in claim 1 wherein, The second threaded segment (103) and the drill bit (104) are integrally formed, and the limiting rod (105) and the guide rod (106) are fixedly connected with the second threaded segment (103) respectively.

3. A two-step threading tap as defined in claim 1 wherein, The second threaded segment (103) forms a clamping structure with the limiting rod (105), the guide rod (106), the through hole (107) and the guide groove (108), the limiting rod (105) penetrates the inside of the first threaded segment (102), and the top end of the limiting rod (105) is clamped in the inside of the screw head (101).

4. A two-step threading tap as defined in claim 1 wherein, The limit structure (2) includes a limiting groove (201), a group of the limiting grooves (201) are symmetrically arranged in the inside of the screw head (101), the inside of the limiting groove (201) penetrates a clamping rod (202), the outside of the clamping rod (202) is fixedly sleeved with a limiting ring plate (203), the outside of the clamping rod (202) movably sleeved with a spring (204), one end of the clamping rod (202) away from the limiting ring plate (203) is fixedly connected with a groove frame (205), and the inside of the groove frame (205) is fixedly connected with a supporting rod (206).

5. A two-step threading tap as defined in claim 4 wherein, A clamping groove matched with the end of the clamping rod (202) is formed in the inside of the limiting rod (105), and one end of the clamping rod (202) close to the limiting ring plate (203) is clamped in the inside of the limiting rod (105).

6. A two-step threading tap as defined in claim 4 wherein, The limiting ring plate (203) forms an elastic structure with the limiting groove (201) through the spring (204), and the outer wall of the limiting ring plate (203) is attached to the inner wall of the limiting groove (201). The limiting ring plate (203) forms an elastic structure with the limiting groove (201) through the spring (204), and the outer wall of the limiting ring plate (203) is attached to the inner wall of the limiting groove (201).

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