TWI508825B - Double cone drill structure for detaching damaged screw - Google Patents

Description

Double-headed taper structure for removing damaged screws

The present invention provides a double-headed taper structure for removing a damaged screw, which is related to the tool structure for removing the damaged part.

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 Condensing section 113 to the neck 115 constitutes a chip flute 112, and the reverse engagement teeth section 113 of the shank 12, the reverse of the tooth section 113 as compared to the damaged thread screw thread is the inverse of A tooth; Thereby, the drill cone 10 can be scraped by the blade lip 114 and drilled into the driving groove A1 of the damaged screw A, and the drive is continuously driven to lock the drill cone 10 through the reverse tooth segment 113 to engage the damaged screw A, and at the same time The damaged screw A can be driven to be led out; however, although the upper tapping cone 10 can be combined with the damaged screw A and achieve the purpose of driving, since the drill cone 10 operates mainly by first scraping through the two lip 114 The driving groove A1 of the damaged screw A, that is, the blade lip 114 is mainly responsible for the scraping action; after that, the reversed tooth segment 113 is used to break into the scraped driving groove A1, and the tooth segment is tapped through the reverse tooth segment 113 and locked. The driving groove A1, that is, the reverse tooth segment 113 is responsible for combining the damaged screw A and the portion to be driven; and the necking portion 112 is disposed between the reverse tooth segment 113 and the front end portion 111. The lip 114 extends to the necking section 112, that is, the end 114, and the reverse tooth section 113 starts after the necking section 112, such that the scraping action of the two end edges 111 of the front end portion 111 to the necking section 112 terminates, and the tapping action of the reverse segment 113 must be restarted after the necking segment 112. The necking section 112 becomes an empty window for continuously driving the drill cone 10 to engage with the action of the damaged screw A, so that the reverse tooth section 113 is subjected to great resistance and causes operational difficulties; and in view of this, the inventors have studied diligently. And more in-depth conception, after many research and development trials, finally invented a double-headed drill cone structure to remove the damaged screws.

The invention provides a double-headed drill cone structure for removing damaged screws, and the main purpose thereof is to improve the hollow window of the generally disassembled damaged screw which has a displacement action and a scraping action, and has a large driving resistance and a lack of operation difficulty. .

In order to achieve the foregoing objective, the present invention provides a double-headed drill cone structure for removing a damaged screw, comprising a scraper drill body and a bite claw drill body respectively connected to two ends of a drill handle, the drill handle, the scraping The cutting body and the biting body extend along a central axis, wherein: the scraping drill body comprises a drill tip and a taper segment, the drill tip has a drill tip and the scraping body is The taper segment engages the shank, the outer peripheral surface of the taper segment extends in an angle with respect to the central axis, and the taper segment expands toward the shank; and the tapered segment has a tapered structure and has a a reverse tooth; and the symmetrical arrangement of the scraping drill body is continuously extended from the drill tip portion to the scraping portion of the taper segment, and the scraping portion defines the drill tip portion to define two relief faces, each of the scraping portions respectively having a first 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 The bead segment intersects the first engaging surface of the residual portion, and the first scraping surface intersects the drill tip portion to form a first scraping edge extending from the apex of the drill tip and the taper segment And the second scraping surface and the drill tip portion, the tapered tooth segment and the residual portion The second interface intersects, and the second scraping surface intersects the drill tip to form a second scraping edge extending between the apex of the drill tip and the taper segment; and the bite drill As a cone, the bite body is a cone that tapers away from the shank in a direction away from the shank. The outer peripheral surface of the bite body is provided with a reverse tooth, and the bite is drilled. An end of the biting claw is circular in shape, and a cutting groove is arranged on the end surface of the biting claw, and the dividing groove is a U-shaped groove recessed toward the shank along the central axis. In the groove form, the peripheral edge of the cutting groove 421 and the bite end surface 42 are adjacent to each other to form a claw portion 422.

The invention penetrates the drill tip and the cone segment disposed immediately adjacent to the scraping drill body at one end, and the scraping portion continuously extends from the drill tip portion to the scraping portion of the taper segment, so that the scraping drill body starts the scraping action from the drill tip portion, and The scraping action continues to extend to the taper segment, and the continuous scraping action guides the taper segment to be displaced and can be simultaneously shaped to form a thread, thereby causing the taper segment to be guided The combination with the damaged screw is combined to improve the smoothness of the overall double-head taper structure feed and the convenience of the overall operation; and the bite-claw drill body at the other end can be increased through the groove of the end face of the bite jaw disposed at the end face. The friction between the driving groove and the driving groove can be tightly bitten, and the bite claw body can be smoothly fed after being bitten into the driving groove and combined with the damaged screw, thereby improving the satisfaction of different damages. The application of the screw improves the applicability of the use.

"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

21‧‧‧First ring groove

22‧‧‧second ring groove

30‧‧‧Scratch drill

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

40‧‧‧biting the claw

41‧‧‧Reverse teeth

42‧‧‧biting end face

421‧‧‧"

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 double-headed taper structure of the present invention with the damaged screw removed.

FIG. 3 is a perspective view showing another perspective view of a double-headed taper structure for removing a damaged screw according to the present invention.

4 is a plan view showing the structure of a double-headed drill cone for removing a damaged screw according to the present invention.

Fig. 5 is an end elevational view of the scraping drill body of the double-headed taper structure with the damaged screw removed according to the present invention.

Figure 6 is an end elevational view of the bite jaw drill body of the double-headed drill cone structure with the damaged screw removed according to the present invention.

FIG. 7 is a schematic view showing the use of the double-headed taper structure for removing the damaged screw according to the present invention to scrape the drill body and the damaged screw.

Figure 8 is a partially enlarged schematic view of Figure 7.

FIG. 9 is a schematic view showing a state in which a double-headed taper structure for removing a damaged screw is combined with a scraping screw and a damaged screw according to the present invention.

FIG. 10 is a schematic view of the double-headed taper structure for removing the damaged screw according to the present invention, in which the drilled body is combined with the damaged screw and driven to rotate.

Figure 11 is a double-headed taper structure for removing a damaged screw according to the present invention. Schematic diagram of the use.

Figure 12 is a partially enlarged schematic view of Figure 11.

FIG. 13 is a schematic view showing the state in which the double-headed taper structure of the damaged screw of the present invention is combined with the damaged screw.

FIG. 14 is a schematic view of the double-headed taper structure for removing the damaged screw according to the present invention, which is combined with the damaged screw and driven to rotate.

Figure 15 is an end elevational view of another embodiment of a bite-claw drill body of a double-headed drill cone structure with a damaged screw removed in accordance with the present invention.

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 double-headed drill cone structure of the present invention for removing damaged screws For example, as shown in FIGS. 2 to 6, the double-headed 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. The present invention The double-headed drill cone structure for removing the damaged screw comprises a scraping drill body 30 and a biting claw drill body 40 respectively connected to the two ends of a drill shank 20, and the double-headed drill cone structure of the present invention for removing the damaged screw is integrated along the whole The central axis X extends the length, wherein the scraping drill body 30 includes a drill tip portion 31 and a taper segment 32, the drill tip portion 31 has a drill tip 311, and the scraping drill body 30 has the taper segment 32 is engaged with the shank 20, the outer circumferential surface of the tapered tooth segment 32 extends at an angle with respect to the central axis X, and the tapered tooth segment 32 is expanded toward the shank 20; and the tapered tooth segment 32 has a tapered structure. And having a reverse tooth 321 which is a thread that is opposite to the screw thread A2; the double-head drill The tapered structure of the scraping drill body 30 is symmetrically disposed on the two respectively by the drill tip The portion 31 extends continuously to the scraping portion 33 of the taper segment 32. The scraping portion 33 defines the dimple portion 31 defining two relief surfaces 312, each of the scraping portions 33 having a first scraping surface 331 and a residual portion. The portion 332 and the second scraping surface 333 are configured to be angularly connected by the first engaging surface 334 and the second engaging surface 335. The residual portion 332 of the embodiment is formed by turning the first scraping surface. a special pyramid shape formed by the 331 and the second scraping surface 333, the first scraping surface 331 intersecting the drill tip portion 31, the tapered portion 32 and the first engaging surface 334 of the residual portion 332, the first A first scraping edge 336 is formed at the intersection of the scraping surface 331 and the drill tip portion 31. The first scraping edge 336 extends between the drill tip apex 311 and the taper segment 32; and the second scraping surface 333 and the The second tipping surface 335 of the drill tip 31, the tapered section 32 and the residual portion 332 intersect, and the second scraping surface 333 intersects the drill tip portion 31 to form a second scraping edge 337, the second a scraping edge 337 extends between the apex 311 of the drill tip and the tapered section 32; further, the shank 20 is adjacent to the scraping drill 30 Further, a first ring groove 21 is provided, and the first ring groove 21 is powered by a driving tool; and the bite body 40 is a cone, and the bite body 40 is moved away from the shank 20 a tapered body having a tapered shape in the direction of the shank 20, the outer peripheral surface of the bite drill body 40 is provided with a reverse tooth 41, the reverse tooth 41 is a screw thread opposite to the screw thread A2, and the bite drill body 40 One end of the shank 42 is a bite end surface 42. The end surface 42 of the nipper is circular. The end surface 42 of the nipper 42 is provided with a groove 421, and the periphery of the groove 421 and the end surface of the nipper. 42 is adjacent to a bite portion 422, and the biting portion 422 is used as a scraping body. The cutting groove 421 of the embodiment has a cross shape on the end surface 42 of the biting claw (FIG. 6), and the cutting groove 421 a U-shaped groove shape recessed toward the shank 20 in the direction of the central axis X; further, the shank 20 is further disposed with a second ring groove 22 adjacent to the bite body 40, the second ring groove 22 power supply driving tool combination; and the groove 421 can also be set to a letter shape (as shown in Figure 15).

The above is the structural configuration and the feature of the double-headed taper structure for removing the damaged screw of the present invention. When used, the drill tip portion of the scraping drill body 30 of the double-headed taper structure can be used as shown in FIG. 7 to FIG. The first scraping edge 336 on the 31, the second scraping edge 337 contacts the driving slot A1 of the damaged screw A, and drives the double-headed taper structure to rotate, so that the scraping portions of the scraping drill body 30 of the double-head taper structure The first scraping edge 336 and the second scraping edge 337 of the blade scrape the driving groove A1, and then, since the taper segment 32 is engaged with the drill tip portion 31, and more, because the scraping portion 33 is the drill point The portion 31 extends continuously to the arrangement of the tapered portion 32. The scraping operation of the scraping portion 33 is not limited to the range of the drill tip portion 31, but can be extended to the extent of the tapered tooth segment 32 for scraping; 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, and at this time, extend to the cone The scraping portion 33 of the segment 32 can continuously scrape the driving groove A1, and the scraping portion 33 located on the taper segment 32 is more The taper size of the segment 32 changes to expand the scraping range, so that the scraping portion 33 on the taper segment 32 is sculpted to conform to the shape of the taper segment 32, thereby reducing the resistance of the taper segment 32 to feed; At the same time, the rotation of the double-head taper structure causes the taper segment 32 to splicing the screw hole in the driving groove A1, and the reverse tooth of the taper segment 32 of the scraping drill body 30 on the double-head taper structure 321 is a thread that is opposite to the screw thread A2, so in the state in which the double-head taper structure is driven to feed and join the damaged screw A, the damaged screw A is simultaneously coupled to the drilling structure. The upper side exits in the opposite direction to the feeding direction of the drilling structure, and accordingly, the damaged screw A can be driven smoothly.

In addition, the double-headed taper structure of the present invention for removing the damaged screw can also be as shown in FIGS. 11 to 14, in which the bite end surface 42 of the bite-drilled body 40 of the double-headed taper structure contacts the damaged screw A. drive The movable end face 42 is a circular end face, and the biting end face 42 of the present invention is particularly suitable for the severely damaged driving groove A1, and the double-headed taper structure is driven to rotate, so that the double-headed drill cone The groove 421 of the bite end face 42 of the bite-saw body 40 of the structure contacts and scrapes the drive groove A1, and the present invention generates the bite portion 422 through the groove ditch 421 and the bite end face 42 due to the height drop. The biting claw portion 422 can be scraped in a sharper angle than the driving groove A1. In the working state, the scraping drill body 30 penetrates through the scraping portion 33 extending to the taper segment 32 to be deeply scraped. While the scraping is performed, the gripping end surface 42 is increased in contact with the end surface of the driving groove A1 through the dividing groove 421 and the claw portion 422 provided on the end surface 42, thereby increasing the frictional force with the driving groove A1. The driving groove A1 is bitten by the frictional force. When the biting end surface 42 is bitten to the driving groove A1, since the biting end face 42 is disposed on the end surface of the biting claw 40, the double head When the taper cone structure continues to rotate, the gripper end face 42 bites the drive slot A1 and drives the whole The double-headed drill cone structure penetrates into the driving groove A, and can directly guide the biting claw drill body 40 to contact the driving groove A1, and when the biting claw drilling body 40 contacts the driving groove A1, the biting claw drill body The reverse tooth 41 on the 40 is a thread that is opposite to the screw thread A2, so in the state in which the double-head taper structure is driven to the damaged screw A and fed, the damaged screw A is simultaneously combined. On the drilling structure, the direction is reversed in the direction opposite to the feeding direction of the drilling structure, so that the damaged screw A can be driven smoothly.

It can be seen from the above that the double-headed taper structure of the present invention for removing the damaged screw passes through the drill tip portion 31 and the tapered tooth portion 32 disposed immediately adjacent to the scraping drill body 30, and the drill point portion 31 continuously extends to the tapered tooth portion. The scraping portion 33 of the 32 causes the scraping drill body 30 to start the scraping operation by the drill tip portion 31, and continues the scraping motion to the tapered tooth segment 32. The continuous scraping motion guiding the tapered cone segment 32 is displaced and can be simultaneously shaped. The thread is extracted, so that the taper segment 32 is guided to feed and is combined with the damaged screw A, thereby improving the smoothness of the overall double-head taper structure feeding and the convenience of the overall operation; Drill The body 40 can increase the frictional force with the driving groove A1 through the cutting groove 421 provided on the end surface 42 of the end face, and can bite the severely damaged driving groove A1, thereby improving the applicability of the use.

In addition, the scraping portion 33 of the double-headed taper structure with the damaged screw of the present invention has the first scraping surface 331 and the second scraping surface 331 which are mainly used for scraping, and the first scraping surface 331 is turned and formed. The residual portion 332 which is inevitably generated after the second scraping surface 333 makes the scraping portion 33 a special form which is distinct from the general taper structure, thereby improving the visibility thereof.

20‧‧‧ drill handle

21‧‧‧First ring groove

22‧‧‧second ring groove

30‧‧‧Scratch drill

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

40‧‧‧biting the claw

41‧‧‧Reverse teeth

42‧‧‧biting end face

421‧‧‧"

422‧‧‧biting the claw

X‧‧‧Axis

Claims (4)

A double-headed drill cone structure for removing a damaged screw, comprising: a scraping drill body and a biting claw drill body respectively connected to two ends of a drill handle, the drill handle, the scraping drill body and the bite claw body along a central axis An extension length, wherein: the scraping drill body comprises a drill tip and a taper segment, the drill tip having a tip apex, the scraping drill body engaging the shank with the taper segment, the taper The extending direction of the outer peripheral surface of the segment has an angle with respect to the central axis, and the tapered tooth segment is expanded toward the shank; and the tapered tooth segment has a tapered structure and has a reverse tooth; and the scraping body is symmetrically disposed. The cutting tip portion continuously extends to the scraping portion of the tapered tooth segment, and the scraping portion defines the dimple portion to define two chamfering surfaces, each of the scraping portions respectively having a first scraping surface, a residual portion, and a first portion a 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 first connecting surface of the drill tip portion, the tapered portion and the residual portion Intersecting, the first scraping surface intersects the drill tip portion to form a first scraping edge The first scraping edge extends between the apex of the drill tip and the tapered segment; and the second scraping surface intersects the drill tip portion, the tapered segment and the second engaging surface of the residual portion, and the first Forming a second scraping edge at the intersection of the second scraping surface and the drill tip portion, the second scraping edge extending between the apex of the drill tip and the taper segment; and the bite claw is a cone and the biting claw The drill body is a cone that tapers away from the shank in a direction away from the shank. The outer peripheral surface of the bite drill body is provided with a reverse tooth, and the end of the bite drill body away from the shank is a bite a claw end surface, the end surface of the biting claw has a circular shape, and a cutting groove is disposed on the end surface of the biting claw, wherein the dividing groove is a U-shaped groove shape recessed toward the shank along the central axis direction, and a periphery of the cutting groove Adjacent to the end face of the biting claw becomes a biting claw portion. A double-headed taper structure for removing a damaged screw according to claim 1 of the patent application, The section of the bite-drilled body has a cross-shaped shape on the end face of the biting claw. The double-headed taper structure for removing the damaged screw according to the first aspect of the invention, wherein the shank is further provided with a first ring groove adjacent to the scraping drill body, the first ring groove is provided The electric driving tool is combined; and the shank is further disposed with a second ring groove adjacent to the biting claw body, and the second ring groove is powered by the driving tool. The double-headed taper structure for removing the damaged screw according to the first aspect of the invention, wherein the cutting groove of the biting claw drill body runs in a shape on the end surface of the biting claw.