A telescopic punch drill with convenient desquamation

Abstract

The application discloses a telescopic punching drill convenient for desquamation, which mainly comprises a drill body, a center drill is fixedly installed on the top of the drill body, a connecting piece is arranged on the drill body, a straight-through hole is arranged in the connecting piece, the whole drill body with the front-end center drill can slide up and down relative to the straight-through hole, an outer thread for installing an outer hole drill and a cap sleeve is arranged on the outer wall of the connecting piece, the lower part of the outer thread is connected with a fixing base, a center hole is arranged in the drill body, transverse sliding grooves penetrating through the left and right sides of the drill body are arranged on the lower section of the drill body on both sides of the center hole, a clamping hole is arranged on the top of the transverse sliding groove, and the maximum hole diameter of the clamping hole is greater than the width of the transverse sliding groove; and a detachable drill locking structure is arranged between the fixing base and the clamping hole. The telescopic punching drill convenient for desquamation has the characteristics of simple structure and practicality, the center drill and the drill body in the structure can perform axial telescopic action relative to the outer hole drill, and thus the rapid desquamation operation can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to a punch drill, in particular to a telescopic punch drill facilitating chip removal. BACKGROUND

[0002] The punch drill is a commonly used drill bit in the operation of wood, ceramic, plastic, fiber, metal and some non-metallic materials. The existing punch drill mainly comprises a drill body, a center drill, an outer hole drill and a cap sleeve. The center drill is fixedly installed on the top of the drill body. The outer hole drill is threadedly installed above the drill body. The cap sleeve is sleeved on the middle part of the drill body. The tail part of the drill body is provided with a handle.

[0003] In the above structure, the relative positions of the assembled outer hole drill, drill body and center drill are unchanged. This structure brings great problems to the chip removal after punching. During the punching process, the residual waste from the punch drill often gets stuck in the inner part of the outer hole drill. The chip removal operation needs to be assisted by other tools, which not only is troublesome but also seriously affects the punching efficiency. SUMMARY

[0004] In view of the above problems, the present application designs a telescopic punch drill facilitating chip removal. The center drill and the drill body in the structure can perform axial telescopic action relative to the outer hole drill, thereby realizing fast chip removal operation and having the characteristics of simple and practical structure.

[0005] To achieve the above purpose, the present application adopts the following technical scheme:

[0006] A telescopic punch drill facilitating chip removal mainly comprises a drill body. The top of the drill body is fixedly installed with a center drill. The drill body is externally sleeved with a connecting piece. The connecting piece is provided with a through hole penetrating upward and downward. The through hole is in clearance fit with the drill body. The entire drill body with the front-end center drill can slide upward and downward relative to the through hole. The outer wall of the connecting piece is provided with external threads for installing the outer hole drill and the cap sleeve. The lower part of the external threads is connected with a fixed seat. The inside of the drill body is provided with a central hole. The lower section of the drill body is provided with a transverse sliding groove penetrating left and right of the drill body on both sides of the central hole. The top of the transverse sliding groove is provided with a clamping hole. The maximum diameter of the clamping hole is greater than the width of the transverse sliding groove. A separable drill body locking structure is arranged between the fixed seat and the clamping hole. When the locking is released, the transverse sliding groove on the drill body can freely slide relative to the drill body locking structure, so that the entire drill body can telescopically extend upward and downward relative to the fixed seat and the connecting piece.

[0007] More specifically, the upper part of the external threads is threadedly connected with the outer hole drill, and the middle part of the external threads is connected with the cap sleeve.

[0008] More specifically, the drill body locking structure comprises a mounting hole arranged on the fixing seat corresponding to the position of the clamping hole, the mounting hole has different diameters on both sides of the drill body, the mouth of the mounting hole on the side of the large diameter is provided with a clamping groove, a clamping spring is arranged in the clamping groove, a reset spring and a clamping pin are sequentially arranged on the inner side of the clamping spring, the clamping pin is provided with a front clamping protrusion and a rear clamping protrusion at intervals, the reset spring has a pre-compression amount, so that the clamping pin always moves backward until the rear clamping protrusion on the clamping pin is supported on the small diameter section of the mounting hole, at this time, the front clamping protrusion and the rear clamping protrusion of the clamping pin are simultaneously inserted into the clamping holes on both sides of the center hole of the drill body to realize locking, the rear end of the clamping pin protrudes from the small diameter section of the mounting hole by a distance and is connected with a pressing cap, the clamping pin can be pushed forward by pressing the pressing cap with external force, when the front clamping protrusion of the clamping pin is separated from the clamping hole, the rear clamping protrusion just enters the center hole to release the locking of the drill body.

[0009] More specifically, the rear clamping protrusion on the clamping pin is provided with chamfered inclined surfaces on both sides.

[0010] More specifically, the cap sleeve is composed of an upper sleeve and a lower sleeve, the inner hole of the lower sleeve is provided with an external thread connected with the external thread of the connecting piece; the top of the upper sleeve is provided with a plurality of positioning columns in the circumferential direction, the positioning columns can be clamped into the positioning holes on the bottom plate of the outer hole drill when the upper sleeve moves upward; the lower part of the upper sleeve is supported and mounted in the lower sleeve through an elastic sheet, when the lower sleeve rotates relative to the connecting piece, the elastic sheet will be squeezed, the elastic sheet is deformed to generate a reset force to push the upper sleeve upward to be supported on the bottom plate of the outer hole drill.

[0011] More specifically, the tail of the drill body is provided with a handle.

[0012] The telescopic punching drill is designed, the drill body is positioned through the drill body locking structure on the fixing seat, and the drill body can slide up and down relative to the through hole of the connecting piece when the drill body locking is released.

[0013] When punching, the drill body locking structure is used to realize effective positioning of the drill body on the fixing seat, at this time, the relative position of the drill body and the center drill relative to the outer hole drill is unchanged, so that the punching operation can be normally performed. After the punching is completed, the clamping pin on the drill body locking structure is pressed by external force, so that the front clamping protrusion on the clamping pin is separated from the clamping hole, and the rear clamping protrusion enters the center hole of the drill body, at this time, the constraint between the clamping hole of the drill body and the clamping pin is released, the clamping pin can freely slide relative to the transverse sliding groove of the drill body, and then the drill body with the front end of the center drill can be forwardly extended relative to the connecting piece and the cap sleeve, and the forward extension of the drill body and the center drill can quickly realize the descaling operation of the residual waste in the outer hole drill. After the descaling is completed, the drill body is only needed to be pulled down to the clamping hole position again, at this time, the clamping pin will be popped out under the reset force of the reset spring and enter the clamping hole again to realize locking, so as to prepare for the next punching. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A three-dimensional structural diagram of the present invention;

[0015] Figure 2 A cross-sectional view of the structure of the present invention;

[0016] Figure 3 A three-dimensional structural diagram of the drill body of the present invention;

[0017] Figure 4 A three-dimensional structural diagram of the cap cover of the present invention;

[0018] Figure 5 A three-dimensional structural diagram of the locking pin of the present invention;

[0019] Figure 6 A cross-sectional view of the drill body locking structure of the present invention after it has been unlocked;

[0020] Figure 7 A cross-sectional view of the drill body of the present invention extending forward with the central drill.

[0021] in

[0022] 1—Drill body, 11—Center hole, 12—Transverse groove, 121—Mocking hole, 13—Handle;

[0023] 2—Center drill;

[0024] 3—External hole drill, 31—Base plate, 311—Positioning hole;

[0025] 4—Cap cover, 4a—Upper kit, 4b—Lower kit, 4a1—Positioning post, 4c—Elastic piece;

[0026] 5—Connector; 51—Through hole; 52—External thread;

[0027] 6—Fixed base;

[0028] 7—Drill body locking structure, 71—Mounting hole, 72—Slot, 73—Snap ring, 74—Reset spring, 75—Snap pin, 751—Front engaging protrusion, 752—Rear engaging protrusion, 7521—Chamfered bevel, 76—Pressure cap. Detailed Implementation

[0029] like Figures 1-7 As shown, a telescopic drilling drill that facilitates chip removal mainly includes a drill body 1, with a central hole 11 at the center of the drill body 1, and a central drill 2 fixedly installed on the top of the central hole 11.

[0030] The drill body 1 is connected with the outer hole drill 3 and the cap sleeve 4 through a connecting piece 5. The connecting piece 5 is provided with a through hole 51 penetrating from top to bottom. The through hole 51 is in clearance fit with the drill body 1, so that the whole drill body 1 with the front-end center drill 2 can slide up and down relative to the through hole 51.

[0031] The outer wall of the connecting piece 5 is provided with external threads 52. The upper part of the external threads 52 is in threaded connection with the bottom plate 31 of the outer hole drill 3. The middle part of the external threads 52 is in threaded connection with the cap sleeve 4. The lower part of the external threads 52 is connected with a fixing base 6.

[0032] The outer hole drill 3 has different specifications in different use scenarios. In actual use, the corresponding structure is selected according to the need.

[0033] In the present embodiment, the cap sleeve 4 is composed of an upper sleeve 4a and a lower sleeve 4b. The inner hole of the lower sleeve 4b is provided with connecting threads for connecting with the external threads 52 of the connecting piece 5. The top of the upper sleeve 4a is provided with a plurality of positioning columns 4a1 in the circumferential direction. When the upper sleeve 4a moves upward, the positioning columns 4a1 can be correspondingly clamped into the positioning holes 311 on the bottom plate 31 of the outer hole drill 3, so as to realize the circumferential locking of the outer hole drill 3. The lower part of the upper sleeve 4a is installed in the lower sleeve 4b through an elastic sheet 4c. When the lower sleeve 4b rotates relative to the connecting piece 5, the elastic sheet 4c will be squeezed, and the reset force generated by the deformation of the elastic sheet 4c will push the upper sleeve 4a to move upward and be supported on the bottom plate 31 of the outer hole drill 3. In actual use, other structures of the cap sleeve 4 can also be used, as long as the circumferential positioning of the outer hole drill 3 can be realized.

[0034] The lower section of the drill body 1 is provided with transverse sliding grooves 12 penetrating the left and right of the drill body on both sides of the central hole. The top of the transverse sliding groove 12 is provided with a clamping hole 121. The maximum hole diameter of the clamping hole 121 is greater than the width of the transverse sliding groove 12.

[0035] The fixing base 6 corresponds to the position of the clamping hole 121 and is provided with a separable drill body locking structure 7 therebetween. When the locking is released, the whole drill body 1 can use the transverse sliding groove 12 thereon to stretch and contract relative to the fixing base 6, the connecting piece 5 and the outer hole drill 3.

[0036] In the present embodiment, the drill body locking structure 7 includes a mounting hole 71 provided on the fixing base 6 and corresponding to the position of the clamping hole 121. The hole diameters of the mounting hole 71 on both sides of the drill body 1 are different. The mouth of the mounting hole 71 on the side of the large hole diameter is provided with a clamping groove 72. A clamping spring 73 is installed in the clamping groove 72. The mounting hole 71 is sequentially provided with a reset spring 74 and a clamping pin 75 on the inner side of the clamping spring 72.

[0037] The front and rear engaging protrusions 751 and 752 are arranged on the pin 75, and the pin 75 is always moved backward by the pre-compression of the return spring 74 until the rear engaging protrusion 752 is held on the small hole section of the mounting hole 71, and at this time, the front and rear engaging protrusions 751 and 752 of the pin 75 are just engaged into the engaging holes 121 on both sides of the center hole 11 of the drill body 1 to lock the drill body 1.

[0038] The rear end of the pin 75 extends out of the small hole section of the mounting hole 71 by a distance and is connected with a pressing cap 76, and the pressing cap 76 can be pressed by external force to push the pin 75 forward, and the forward movement of the pin 75 will make the front engaging protrusion 751 on the pin 75 disengage from the engaging hole 121, and at the same time, the rear engaging protrusion 752 is just engaged into the center hole 11, and at this time, the pin 75 is unlocked from the engaging hole 121, and the axial constraint of the drill body 1 is released, and at this time, the drill body 1 can be freely moved up and down relative to the fixed seat 6 and the connecting piece 5 by the transverse sliding groove 12.

[0039] The telescopic drilling device is designed, the drill body 1 can be moved up and down relative to the through hole 51 of the connecting piece 5, and the positioning of the drill body 1 is realized by the drill body locking structure 7 on the fixed seat 6. When drilling, the effective positioning of the drill body 1 on the fixed seat 6 is realized by the drill body locking structure 7, and at this time, the relative position of the drill body 1 and the outer hole drill 3 remains unchanged to ensure normal drilling operation. After drilling is completed, the pin 75 on the drill body locking structure 7 is pressed to make the front engaging protrusion 751 on the pin 75 disengage from the engaging hole 121 and the rear engaging protrusion 752 enter the center hole 11 of the drill body 1, and at this time, the engaging hole 121 is released from the constraint of the pin 75, and the pin 75 can be freely slid relative to the transverse sliding groove 12 of the drill body 1, and then the entire drill body 1 with the front end center drill 2 is moved forward relative to the connecting piece 5, the cap sleeve 4 and the outer hole drill 3, and the forward movement of the drill body 1 and the center drill 2 can quickly bring out the residual waste in the outer hole drill 3 to realize the descaling operation. After the descaling is completed, the drill body 1 is only pulled down to the engaging hole 121 position, and at this time, the pin 75 will be ejected under the reset force of the return spring 74 and re-enter the engaging hole 121 to realize the relocking of the drill body 1 to prepare for the next drilling.

[0040] The rear engaging protrusion 752 on the pin 75 is provided with chamfered inclined surfaces 7521 on both sides to ensure smooth sliding of the rear engaging protrusion 752 after entering the center hole 11 to avoid the phenomenon of being stuck.

[0041] The tail of the drill body 1 is provided with a handle 13.

[0042] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change or modification made to the above embodiment according to the technical principle of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A telescopic drilling drill with convenient chip removal, comprising a drill body (1), wherein a center drill (2) is fixedly mounted on the top of the drill body (1), characterized in that: The drill body (1) is fitted with a connector (5), which has a through hole (51) running vertically through it. The through hole (51) is clearance-fitted with the drill body (1), allowing the entire drill body (1) and the center drill (2) at the front end to slide vertically relative to the through hole (51). The outer wall of the connector (5) is provided with an external thread (52) for mounting an external drill and a cap. The lower part of the external thread (52) is connected to a fixed seat (6). The drill body (1) has a center hole (11) inside, and the lower section of the drill body (1) has transverse grooves (12) running through the left and right sides of the center hole (11) on both sides of the lower section of the drill body (1). The top of the transverse slide (12) is provided with a locking hole (121), the maximum diameter of which is greater than the width of the transverse slide (12); a separable drill body locking structure (7) is provided between the fixed seat (6) and the locking hole (121). When the lock is released, the transverse slide (12) on the drill body (1) can slide freely relative to the drill body locking structure (7), allowing the entire drill body (1) to extend and retract vertically relative to the fixed seat (6) and the connecting piece (5); the drill body locking structure (7) includes a mounting hole (71) on the fixed seat (6) corresponding to the position of the locking hole (121). The mounting hole (71) has different diameters on both sides of the drill body (1). A slot (72) is provided at the opening of the mounting hole (71) on the larger diameter side. A retaining spring (73) is installed in the slot (72). A return spring (74) and a retaining pin (75) are sequentially arranged inside the retaining spring (73) of the mounting hole (71). A front engaging protrusion (751) and a rear engaging protrusion (752) are spaced apart on the retaining pin (75). The return spring (74) has a pre-compression amount, causing the retaining pin (75) to always move backward until the rear engaging protrusion (752) on it abuts against the mounting hole (71). On the small-diameter section, the front engaging protrusion (751) and the rear engaging protrusion (752) of the locking pin (75) simultaneously enter the engaging holes (121) on both sides of the central hole (11) of the drill body (1) to achieve locking. The rear end of the locking pin (75) extends a distance from the small-diameter section of the mounting hole (71) and is connected to a pressure cap (76). Pressing the pressure cap (76) with external force can push the locking pin (75) forward. When the locking pin (75) moves forward and the front engaging protrusion (751) disengages from the engaging hole (121), the rear engaging protrusion (752) just enters the central hole (11) and releases the locking of the drill body (1).

2. The telescopic drilling drill with convenient chip removal as described in claim 1, characterized in that: The upper part of the external thread (52) is threadedly connected to the external drill (3), and the middle part of the external thread (52) is connected to the cap (4).

3. The telescopic drilling drill with convenient chip removal as described in claim 1, characterized in that: The back engagement protrusion (752) on the latch (75) is provided with chamfered bevels (7521) on both sides.

4. A telescopic drilling drill for easy chip removal as described in claim 2, characterized in that: The cap (4) is composed of an upper part (4a) and a lower part (4b). The inner hole of the lower part (4b) is provided with a connecting thread that connects to the external thread (52) of the connector (5). The top of the upper part (4a) is provided with several positioning pins (4a1) along the circumferential direction. When the upper part (4a) moves upward, the positioning pins (4a1) can be correspondingly inserted into the positioning holes (311) on the bottom plate (31) of the external drill (3). The lower part of the upper part (4a) is supported and installed in the lower part (4b) by an elastic piece (4c). When the lower part (4b) rotates upward relative to the connector (5), it will squeeze the elastic piece (4c). The deformation of the elastic piece (4c) will generate a restoring force, which will push the upper part (4a) upward and support it on the bottom plate (31) of the external drill (3).

5. A telescopic drilling drill with convenient chip removal as described in any one of claims 1-3, characterized in that: The drill body (1) is provided with a connecting handle (13) at its tail.

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