TWI541109B - Drill structure for detaching damaged screw - Google Patents

Description

Drill cone structure for removing damaged screws

The present invention provides a drill cone structure for removing a damaged screw that is associated with a tool structure for removing damaged parts.

Press, the screw is one of the commonly used bonding tools, as long as the driver can be driven by the screw driver with the screw driver. However, during the use of the screwdriver and the screw, the operator's force is not applied, the screwdriver is used. Does not correspond to the size of the drive slot, or the screw driver does not correspond to the shape of the drive slot, which will cause the drive groove of the screw head to be damaged or collapsed; once the drive groove of the screw collapses, the general screwdriver cannot be driven. At this time, in order to disassemble the screw, a drill cone specially adapted for removing the damaged screw must be used; as shown in Fig. 1, a drill cone 10 for removing the damaged screw A is conventionally shown, and the drill cone 10 mainly includes a joint one. a drill body 11 and a drill shank 12, the drill body 11 includes a front end portion 111, a neck portion 112 and a reverse tooth portion 113. The front end portion 111 is provided with a two-blade lip 114. The diameter of the two ends of the neck portion 111 is smaller than the diameter of the front end portion 111 and the end portion 111 and the neck portion 112, respectively. Front end portion 111, reverse tooth Between the 113 and the necking section 112, a chip pocket 115 is formed, and the reverse tooth section 113 engages the shank 12, and the thread of the reverse tooth section 113 is opposite to the thread of the damaged screw A; Thereby, the drill cone 10 can be scraped with the lip 114 and drilled into the drive slot A1 of the damaged screw A for continued The driving causes the drill cone 10 to be locked into the combined damaged screw A through the reverse tooth segment 113, and the damaged screw A can be driven to be led; however, although the upper tapping cone 10 can be combined with the damaged screw A and reaches the driving The purpose is that, since the drill cone 10 is operated, the drive slot A1 of the damaged screw A is first scraped through the blade lip 114, and then the scraped drive slot A1 is penetrated through the reverse tooth segment 113 and transmitted through the reverse direction. The tooth segment 113 taps the tooth shape and locks into the driving groove A1, and since the neck portion 112 is disposed between the reverse tooth segment 113 and the front end portion 111, the blade lip 114 extends to the reverse tooth segment 113. Termination, and the reverse segment 113 starts after the necking segment 112, such that the scraping action of the two lip portions 114 of the front end portion 111 terminates to the necking segment 112, and the reverse segment 113 The tapping action must be restarted after the necking section 112, and the necking section 112 becomes an empty window for continuously driving the drill cone 10 into the action of the damaged screw A, so that the reverse tooth section 113 is subjected to great resistance. Caused by operational difficulties; in view of this, the inventors have devoted themselves to research and further development Thought, after many research and development trials, finally invented a drill cone structure to remove the damaged screws.

The invention provides a drill cone structure for removing a damaged screw. The main purpose of the invention is to improve the general operation of the drill cone of the damaged screw having the movable window and the scraping action, and the driving resistance is large and the operation is difficult.

In order to achieve the foregoing objective, the present invention provides a drill tap structure for removing a damaged screw, comprising a drill shank and a drill body, the drill body having a center shaft, and the drill body includes a drill tip portion and a taper segment having a apex of the drill tip, the drill body engaging the shank with the taper segment, the outer peripheral surface of the taper segment extending in an angle with respect to the central axis, and the taper segment Expanding toward the shank; and the tapered segment has a tapered structure and has a reverse tooth, characterized by The symmetrical arrangement of the drill body is continuously extended from the drill tip portion to the scraping portion of the taper segment, each of the scraping portions respectively having a first scraping surface, a residual portion and a second scraping surface, the residual portion a structure formed by angularly engaging the first engaging surface and the second engaging surface, the first scraping surface intersecting the drill tip portion, the tapered portion and the first engaging surface of the residual portion, the first scraping surface Forming a first scraping edge at the intersection of the drill tip, the first scraping edge extending between the apex of the drill tip and the taper segment; and the second scraping surface and the drill tip portion, the tapered segment and The second engaging surface of the residual portion intersects, and the second scraping surface intersects the drill tip portion to form a second scraping edge extending between the apex of the drill tip and the tapered tooth segment.

"Knowledge Technology"

10‧‧‧Drill cone

11‧‧‧ drilled

111‧‧‧ front end

112‧‧‧neck section

113‧‧‧Reverse tooth segments

114‧‧‧Edge lip

115‧‧‧ chip flute

12‧‧‧ drill handle

A‧‧‧damaged screws

A1‧‧‧ drive slot

"this invention"

20‧‧‧ drill handle

30‧‧‧ drilled

31‧‧‧Drill tip

311‧‧‧ drill tip

312‧‧‧The relief surface

32‧‧‧ cone segment

321‧‧‧ reverse teeth

33‧‧‧Scrapping Department

331‧‧‧First scraped surface

332‧‧‧ Remnant

333‧‧‧Second shaving surface

334‧‧‧ first interface

335‧‧‧Second interface

336‧‧‧First scraping edge

337‧‧‧second scraping edge

34‧‧‧neck section

X‧‧‧Axis

A‧‧‧damaged screws

A1‧‧‧ drive slot

A2‧‧‧ screw thread

Figure 1 shows the drill cone structure for general removal of damaged screws.

2 is a schematic perspective view showing the structure of a drill tap structure for removing a damaged screw according to the present invention.

Figure 3 is a plan view showing the structure of the drill cone for removing the damaged screw of the present invention.

Figure 4 is an end elevational view of the drill cone structure with the damaged screw removed in accordance with the present invention.

FIG. 5 is a schematic view showing the use of a drill tap structure with a damaged screw according to the present invention.

Figure 6 is a partially enlarged schematic view of Figure 5.

Fig. 7 is a schematic view showing the state in which the drill tap structure of the damaged screw is combined with the damaged screw according to the present invention.

FIG. 8 is a schematic view of the drill tap structure for removing the damaged screw according to the present invention combined with the damaged screw and driven.

Figure 9 is a perspective view showing another embodiment of the drill tap structure for removing the damaged screw of the present invention.

Figure 10 is a plan view of the example of Figure 9.

FIG. 11 is a schematic view showing another embodiment of the drill tap structure for removing the damaged screw according to the present invention.

Figure 12 is a partial enlarged view of Figure 11 .

FIG. 13 is a schematic view showing a state in which another embodiment of the drill tap structure for removing the damaged screw is combined with the damaged screw according to the present invention.

FIG. 14 is a schematic view showing another embodiment of the drill tap structure for removing the damaged screw according to the present invention in combination with the damaged screw and driving.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [detailed description of the drawings] as follows: The comparison of the drill cone structure of the present invention for removing the damaged screw For example, as shown in FIGS. 2 to 8, the taper structure is provided for driving a damaged screw A. The damaged screw A has a damaged driving slot A1 and a screw thread A2, and the present invention is damaged. The drill taper structure of the screw includes a drill shank 20 and a drill body 30. The drill body 30 has a center axis X, and the drill body 30 includes a drill tip portion 31 and a taper segment 32. The tip 31 has a apex 311, and the boring portion 30 engages the shank 20 with the taper segment 32. The outer peripheral surface of the taper segment 32 extends at an angle with respect to the central axis X, and the taper segment 32 Rotating toward the shank 20; the tapered segment 32 has a tapered structure and has a reverse tooth 321 which is a thread that is opposite to the screw thread A2; the drill body of the drill cone structure The upper symmetrical arrangement 2 extends continuously from the drill tip 31 to the scraping portion 33 of the tapered segment 32, and the scraping portion 33 The drill tip portion 31 defines two relief surfaces 312, each of which has a first scraping surface 331 , a residual portion 332 and a second scraping surface 333 , the residual portion 332 being defined by the first engaging surface 334 The second interface 335 is angularly connected In the structure, the residual portion 332 of the present embodiment is a special pyramid shape formed by the first shaving surface 331 and the second scraping surface 333 after the turning, the first scraping surface 331 and the drill tip portion 31 and the cone The tooth segment 32 and the first engaging surface 334 of the residual portion 332 intersect, and the first scraping surface 331 intersects the drill tip portion 31 to form a first scraping edge 336 extending from the tip end of the drill point Between the 311 and the tapered section 32, the second scraping surface 333 intersects the drill tip portion 31, the tapered segment 32 and the second engaging surface 335 of the residual portion 332, and the second scraping surface 333 A second scraping edge 337 is formed at the intersection of the drill tip 31 and extends between the tip apex 311 and the tapered section 32.

The above is the structural configuration and special structure of the drill cone structure for removing the damaged screw of the present invention. In use, the first scraping edge 336 and the second scraping edge 337 on the drill tip portion 31 of the drill tap structure contact the driving groove A1 of the damaged screw A to drive the drill cone structure to rotate, so that the drill cone The first scraping edge 336 and the second scraping edge 337 of each of the scraping portions 33 of the structure scrape the driving groove A1, and then, because the taper segment 32 is engaged with the drill tip portion 31, and more, due to the scraping portion 33 It is a configuration in which the drill tip portion 31 continuously extends to the tapered tooth segment 32, and the scraping operation of the scraping portion 33 is not limited to the range of the drill tip portion 31, but can extend to the range of the tapered tooth segment 32. After the first scraping edge 336 on the drill tip 31 and the second scraping edge 337 scrape the driving slot A1, the taper segment 32 can immediately contact the driving slot A1. The scraping portion 33 extending to the taper segment 32 can continuously scrape the driving groove A1, and the scraping portion 33 located on the taper segment 32 further increases the scraping range according to the taper size of the taper segment 32. The scraping portion 33 on the tapered tooth segment 32 is scraped into a shape adapted to the passage of the tapered tooth segment 32, according to which Low feed cone 32 tooth segment resistance; at the same time, the drill is rotated so that the bevel cone structure 32 subsequent to the tooth driving section A1 in the groove The screw hole is reamed, and since the reverse tooth 321 of the taper segment 32 on the taper structure is a thread that is opposite to the screw thread A2, the drill tap structure is driven to feed the damaged screw A. In the combined state, the damaged screw A is simultaneously coupled to the drilling structure and exits in a direction opposite to the feeding direction of the drilling structure, thereby smoothly driving the damaged screw A.

As can be seen from the above, the drill cone structure of the present invention passes through the drill tip portion 31 and the cone disposed immediately adjacent thereto. The tooth segment 32, and the scraping portion 33 continuously extending from the drill tip portion 31 to the taper segment 32, causes the taper structure to start the scraping action by the drill tip portion 31, and the scraping action continues to extend to the taper segment 32, continuous The scraping action guides the taper segment 32 to be displaced and can be simultaneously shaped to form a thread, whereby the taper segment 32 is guidedly fed and combined with the damaged screw A to improve the overall tap structure. The smoothness of the feed and the convenience of the overall operation.

In addition, the scraping portion 33 of the drill tap structure of the present invention for removing the damaged screw has In addition to the first scraping surface 331 and the second scraping surface 333 which are mainly used for scraping, the residual portion 332 which is inevitably generated after the first shaving surface 331 and the second scraping surface 333 are formed by turning the shaving portion 33 In general, the specific shape of the drill cone structure is different, so as to improve the recognition degree thereof. In addition, another embodiment of the present invention is shown in the following with reference to FIG. 9 to FIG. 14 , and the overall configuration is substantially the same as the above embodiment. The difference is that the conical section 32 of the drill body 30 is further provided with a constricted section 34, and the constricted section 34 is coupled to the scraping portion 33. The diameter of the end of the constricted section 34 is smaller than the taper section 32 and the The diameter of the necking portion 34, which is combined with the damaged screw A and driven to rotate, is the same as the above example, as shown in Figs. 11 to 14, and accordingly, the chip generated during the operation of the tap structure is diced. The neck portion 34 can be more smoothly discharged to improve the smoothness of the operation, and since the neck portion 34 is coupled to the scraping portion 33, the neck portion 34 does not affect the duration of the scraping action. There is no interruption of the scraping action, which causes a large feed pressure.

20‧‧‧ drill handle

30‧‧‧ drilled

31‧‧‧Drill tip

311‧‧‧ drill tip

312‧‧‧The relief surface

32‧‧‧ cone segment

321‧‧‧ reverse teeth

33‧‧‧Scrapping Department

331‧‧‧First scraped surface

332‧‧‧ Remnant

333‧‧‧Second shaving surface

334‧‧‧ first interface

335‧‧‧Second interface

336‧‧‧First scraping edge

337‧‧‧second scraping edge

X‧‧‧Axis

Claims (2)

A drill tap structure for removing a damaged screw, comprising a connecting shank and a drill body, the drill body having a central shaft, and the drill body comprises a drill tip and a taper segment, the drill tip The portion has a apex of the drill, the drill body engages the shank with the taper segment, the outer peripheral surface of the taper segment extends at an angle with respect to the central axis, and the taper segment expands toward the shank; The taper segment has a conical structure and has a reverse tooth, wherein the drill body is symmetrically disposed, and the drill tip portion continuously extends to the scraping portion of the taper segment, and each of the scraping portions has a first a scraping surface, a residual portion, and a second scraping surface, wherein the residual portion is formed by angularly engaging the first engaging surface and the second engaging surface, the first scraping surface and the drill tip portion, the tapered portion And intersecting the first engaging surface of the residual portion, the first scraping surface intersecting the drill tip portion to form a first scraping edge extending between the apex of the drill tip and the taper segment; The second scraping surface and the second portion of the drill tip portion, the tapered tooth segment and the residual portion Junction intersection, and the second surface forming a second scraping edges of the scraping tip portion at the intersection of the drill, the second scraper edge extending between the drill point and the cone apex tooth segment. The taper structure for removing the damaged screw according to the first aspect of the invention, wherein the taper segment of the drill body further comprises a necking portion, the necking portion engaging the scraping portion, and the neck portion The diameters of the two ends of the constriction are respectively smaller than the diameter of the junction of the conical section and the constricted section.