Drill bit structure and electric drill

Abstract

The utility model provides a drill bit structure and an electric drill. The drill bit structure comprises a drill bushing and a drill body, the drill bushing is provided with a first positioning surface, and a mounting groove is formed in one side of the first positioning surface of the drill bushing; the drill body comprises a mounting handle, a drill rod and a positioning flange, the mounting handle and the drill rod are connected and coaxially arranged, the positioning flange is arranged on the peripheral side face of the mounting handle in a protruding mode and is close to the drill rod, the mounting handle can be inserted into the mounting groove, and the drill rod is inserted into the mounting groove. The positioning flange can abut against the first positioning face when the mounting handle is inserted into the mounting groove. According to the drill bit structure, positioning of the drill body is achieved through abutting of the positioning flange and the first positioning face on the drill sleeve, judgment depending on hand feeling is not needed any more, the judgment mode is more visual, and it is avoided that due to aging and rusting of the drill sleeve or large errors of an installation handle of the drill body, installation of the installation handle is stuck, and the service life of the drill body is prolonged. And the judgment error of the operator is further caused.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric drill technical field especially relates to a drill bit structure and electric drill. BACKGROUND

[0002] When the electric drill needs to be used, a drill body with a proper length needs to be installed in the drill sleeve. The current drill sleeve is formed with an installation groove. When the drill body is installed, the end of the drill body needs to be inserted into the installation groove and abut against the groove bottom of the installation groove to realize the positioning of the drill body. When the drill body is installed manually, whether the drill body is installed in place can only be judged by feeling the force when the drill body is inserted. However, in the case that the drill sleeve is aged, rusty or the installation handle of the drill body has a large error, the drill body is likely to be stuck at a certain point in the installation groove without reaching the groove bottom when the drill body is installed. At this time, the operator is likely to misjudge that the drill body has been installed in place, which leads to the over-deep drilling on the workpiece or equipment or causes damage to the drill body. SUMMARY

[0003] The utility model aims at providing a drill bit structure and electric drill, and aims at solving the technical problem that the current electric drill is likely to cause over-deep drilling on the workpiece or equipment or damage to the drill body.

[0004] The utility model is implemented as follows: in a first aspect, a drill bit structure is provided, which comprises a drill sleeve and a drill body.

[0005] The drill sleeve is provided with an installation groove on one side of a first positioning surface.

[0006] The drill body comprises an installation handle, a drill rod and a positioning flange. The installation handle and the drill rod are connected and coaxially arranged. The positioning flange is protruded on the circumferential surface of the installation handle. The positioning flange is close to the drill rod. The installation handle can be inserted into the installation groove. The positioning flange can abut against the first positioning surface when the installation handle is inserted into the installation groove.

[0007] In some possible embodiments of the first aspect, the positioning flange is arranged around the installation handle.

[0008] In some possible embodiments of the first aspect, the circumferential surface of the positioning flange is flush with the circumferential surface of the drill sleeve.

[0009] In some possible embodiments of the first aspect, the positioning flange is provided with a second positioning surface. The second positioning surface is arranged around the installation handle. The first positioning surface is arranged around the slot opening of the installation groove. When the installation handle is inserted into the installation groove, the second positioning surface is attached to the first positioning surface.

[0010] In some possible embodiments of the first aspect, the first positioning surface and the second positioning surface are both planar, the first positioning surface is perpendicular to the opening direction of the mounting slot, and the second positioning surface is perpendicular to the axial direction of the mounting shank.

[0011] In some possible embodiments of the first aspect, the drill sleeve is provided with a connecting hole on its peripheral surface, the connecting hole penetrates to the slot side wall of the mounting slot, and the drill head structure further comprises a positioning pin capable of being inserted into the connecting hole, the positioning pin being capable of abutting against the mounting shank through the connecting hole when the mounting shank is inserted into the mounting slot.

[0012] In some possible embodiments of the first aspect, the connecting hole is provided with two connecting holes, the two connecting holes being arranged at intervals along the opening direction of the mounting slot, and the number of the positioning pins is equal to the number of the connecting holes.

[0013] In some possible embodiments of the first aspect, the peripheral surface of the mounting shank comprises a mounting plane and a mounting curved surface, the mounting plane and the mounting curved surface being connected end to end, the slot side wall of the mounting slot and the mounting curved surface of the mounting shank being in clearance fit when the mounting shank is inserted into the mounting slot, and the positioning pin being capable of abutting against the mounting plane.

[0014] In some possible embodiments of the first aspect, the slot side wall of the mounting slot has a slot plane and a slot curved surface, the mounting curved surface being capable of abutting against the slot curved surface when the mounting shank is inserted into the mounting slot, the mounting plane being parallel to the slot plane, and the connecting hole penetrating to the slot plane.

[0015] In the second aspect, an electric drill is improved, comprising a handheld member and the drill head structure as described in each of the above embodiments, wherein the drill sleeve is connected to the handheld member, and the handheld member is capable of driving the drill head structure to rotate around the central axis of the drill body.

[0016] The technical effect of the drill bit structure is that the positioning flange and the first positioning surface on the drill sleeve are abutted to realize the positioning of the drill body, the installation handle is inserted into the installation groove to the specified position, the operator can directly judge whether the drill body is installed in place by observing whether the positioning flange and the positioning surface are abutted, and the judgment mode is more intuitive, and the problems such as aging, rust of the drill sleeve or large installation handle error of the drill body are avoided, and the installation handle is not jammed, and the operator is not misjudged. After the installation handle is installed in place, the fastening connection with the drill sleeve can be realized, and the damage of the drill body during drilling is avoided. At the same time, due to the limitation of the positioning flange, the drill rod can stop continuing to penetrate when the positioning flange abuts against the workpiece or equipment during drilling, that is, the positioning flange limits the maximum drilling depth of the drill body. In addition, by arranging the positioning flange, the operator can insert the drill body into the installation groove by pressing the positioning flange during installation, and the operator can easily exert force. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application or the prior art description. Obviously, the drawings described below are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0018] Figure 1 is an exploded view of the drill bit structure provided by the embodiments of the present application;

[0019] Figure 2 is an assembly view of the drill bit structure provided by the embodiments of the present application;

[0020] Figure 3 is an exploded view of the drill bit structure provided by another embodiment of the present application.

[0021] Explanation of reference signs:

[0022] 100, drill bit structure;

[0023] 10, drill sleeve;

[0024] 101, first positioning surface;

[0025] 11, installation groove;

[0026] 12, connecting hole;

[0027] 1101, groove plane;

[0028] 1102, groove curved surface;

[0029] 20, drill body;

[0030] 21. mounting shank;

[0031] 2101. mounting plane;

[0032] 2102. mounting curved surface;

[0033] 22. drill rod;

[0034] 221. cutting edge;

[0035] 220. helical groove;

[0036] 23. positioning flange;

[0037] 230. second positioning surface. DETAILED DESCRIPTION

[0038] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application.

[0039] In the description of the present application, it should be understood that the terms "length", "width", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0040] In addition, the terms "first", "second", "third", etc. are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0041] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connected", "connected", "fixed", and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the utility model is further described in detail below in combination with the drawings and examples.

[0043] When the electric drill needs to be used, a drill body with a proper length needs to be selected and installed in the drill sleeve. The current drill sleeve is formed with an installation groove. When the drill body is installed, the end of the drill body needs to be inserted into the installation groove and abut against the groove bottom of the installation groove to realize the positioning of the drill body. When the drill body is installed manually, whether the drill body is installed in place can only be judged by feeling the force when the drill body is inserted. However, in the case that the drill sleeve is aged, rusted or the installation handle of the drill body has a large error, the drill body is likely to be stuck at a certain point in the installation groove without reaching the groove bottom when the drill body is installed. At this time, the operator is likely to misjudge that the drill body has been installed in place, which leads to the over-deep drilling of the workpiece or equipment or causes damage to the drill body.

[0044] As Figure 1 and Figure 2 The utility model embodiment provides a drill bit structure 100 and electric drill, wherein the electric drill includes a handheld component and the drill bit structure 100, the drill bit structure 100 is connected to the output end of the handheld component, and the handheld component can drive the drill bit structure 100 to rotate to perform a drilling action on a workpiece or equipment. After drilling is completed, a connecting groove can be formed on the workpiece or equipment, and an operator can fix the position of other structural components by installing a screw in the connecting groove.

[0045] The drill bit structure 100 includes a drill sleeve 10 and a drill body 20. The drill sleeve 10 is connected to the output end of the handheld component, and the drill body 20 is detachably connected to the drill sleeve 10. When in use, an operator can select a drill body 20 with a proper length and install it on the drill sleeve 10 according to the scene requirements. The handheld component can drive the drill bit structure 100 to rotate around the central axis of the drill body 20 to perform a drilling action.

[0046] The drill sleeve 10 has a first positioning surface 101, and the drill sleeve 10 is formed with an installation groove 11 on the side of the first positioning surface 101. The opening of the installation groove 11 faces away from the output end of the handheld component to facilitate the insertion of the drill body 20. The central axis of the installation groove 11 is the rotation axis of the drill sleeve 10.

[0047] The drill body 20 comprises a mounting shank 21, a drill rod 22 and a positioning flange 23. The mounting shank 21 and the drill rod 22 are connected and coaxially arranged. The positioning flange 23 is protruded on the circumferential side surface of the mounting shank 21, and is close to the drill rod 22. The positioning flange 23 can be selected as the end portion close to the drill rod 22. The mounting shank 21 can be inserted into the mounting groove 11. The mounting shank 21 can be limited from moving relative to the drill sleeve 10 by the friction force between the mounting shank 21 and the groove wall of the mounting groove 11 after being inserted into the mounting groove 11, so as to be fixedly connected with the drill sleeve 10. Alternatively, other structural members can be used to fix the position of the mounting shank 21 in the mounting groove 11, so as to achieve the fixed connection between the mounting shank 21 and the drill sleeve 10, which is not limited herein. When the mounting shank 21 is inserted into the mounting groove 11, the positioning flange 23 can abut against the first positioning surface 101.

[0048] In this way, the drill bit structure 100 achieves the positioning of the drill body 20 by the abutment of the positioning flange 23 and the first positioning surface 101 of the drill sleeve 10. At this time, the mounting shank 21 is inserted into the mounting groove 11 to a specified position. The operator can directly judge whether the drill body 20 is installed in place by observing whether the positioning flange 23 abuts against the positioning surface, without relying on the hand feeling for judgment. The judgment method is more intuitive, and the problems such as the aging and rusting of the drill sleeve 10 or the large error of the mounting shank 21 of the drill body 20 are avoided, so as to avoid the installation jamming of the mounting shank 21 and the judgment error of the operator. After the mounting shank 21 is installed in place, the fastening connection with the drill sleeve 10 can be achieved, so as to avoid the damage of the drill body 20 during the drilling process. At the same time, due to the limitation of the positioning flange 23, the drill rod 22 can stop continuing to penetrate when the positioning flange abuts against the workpiece or equipment during the drilling, that is, the positioning flange 23 limits the maximum drilling depth of the drill body 20. In addition, by arranging the positioning flange 23, the operator can press the positioning flange 23 to insert the drill body 20 into the mounting groove 11 during installation, which is convenient for the operator to exert force.

[0049] In this embodiment, the drill rod 22 is also referred to as a twist drill rod 22, which is generally in the shape of an elongated cylinder, and has a helical thread (helical groove 220) on the surface.

[0050] The top end of the twist drill rod 22 is connected with a cutting edge 221 portion, which is the part directly cutting the workpiece. The function of the drill rod 22 is to transmit the torque received by the cutting edge 221 during the drilling process to the entire drill body 20, so as to ensure that the drill body 20 can stably rotate and cut. At the same time, the helical groove 220 on the drill rod 22 is responsible for chip removal and cooling liquid delivery, so as to ensure the smooth progress of the drilling process.

[0051] As Figure 1 and Figure 2Optionally, the drill sleeve 10 is cylindrical, the center axis of the mounting groove 11 is the center axis of the drill sleeve 10, and the peripheral surface of the drill sleeve 10 is arranged around the center axis. The peripheral surface of the drill sleeve 10 can be directly connected to the first positioning surface 101 or indirectly connected to the first positioning surface 101. In other embodiments, the center axis of the mounting groove 11 can be offset from the center axis of the drill sleeve 10, which is not limited here.

[0052] As Figure 1 and Figure 2 Optionally, the mounting handle 21 is an elongated cylinder, and the mounting groove 11 is matched with the mounting handle 21. When the positioning flange 23 is abutted against the first positioning surface 101, the mounting handle 21 can be abutted against the groove bottom of the mounting groove 11 or spaced apart from the groove bottom of the mounting groove 11, so as to prevent the mounting handle 21 from being unable to be installed in place after foreign matters enter the mounting groove 11.

[0053] As Figure 1 and Figure 2 Optionally, the mounting handle 21, the drill rod 22, and the positioning flange 23 are integrally formed, so as to facilitate processing. The material of the drill body 20 can be selected from high-speed steel or hard alloy. The high-speed steel twist drill rod 22 has good toughness and can withstand a certain impact and bending force, and is suitable for drilling low-hardness materials such as wood and ordinary steel. The hard alloy twist drill rod 22 has high hardness and good wear resistance, and is mainly used for drilling high-hardness materials such as quenched steel and stainless steel.

[0054] As Figure 1 and Figure 2 In some embodiments, the positioning flange 23 is arranged around the mounting handle 21, so as to facilitate processing and installation of the positioning flange 23, and the positioning flange 23 arranged around the mounting handle 21 can increase the operation area of an operator.

[0055] Optionally, the peripheral surface of the positioning flange 23 is flush with the peripheral surface of the drill sleeve 10, so as to improve the overall aesthetics of the drill bit structure 100.

[0056] Optionally, the first positioning surface 101 is annular and arranged around the slot opening of the mounting groove 11, the positioning flange 23 has a second positioning surface, the second positioning surface is arranged around the mounting handle 21, and the second positioning surface is abutted against the first positioning surface 101 when the mounting handle 21 is inserted into the mounting groove 11. In this way, the positioning flange 23 can position the drill body 20 in the circumferential direction, avoid deflection of the drill body 20, improve positioning accuracy, and facilitate processing.

[0057] Optionally, the first positioning surface 101 and the second positioning surface are both flat surfaces, the first positioning surface 101 is perpendicular to the opening direction of the mounting groove 11, and the second positioning surface is perpendicular to the axial direction of the mounting handle 21. The flat first positioning surface 101 and the flat second positioning surface can reduce the display of the installation angle of the drill body 20 and improve installation efficiency.

[0058] As Figure 1 And Figure 2 In some embodiments, the drill sleeve 10 is provided with a connecting hole 12 on the circumferential surface thereof, the connecting hole 12 penetrates the slot side wall of the mounting slot 11, the drill bit structure 100 further comprises a positioning pin capable of being inserted into the connecting hole 12, when the mounting shank 21 is inserted into the mounting slot 11, the positioning pin can abut against the mounting shank 21 through the connecting hole 12. In this way, the mounting shank 21 can be tightly abutted against the slot side wall of the mounting slot 11 by the pressure applied by the positioning pin, so as to increase the friction between the mounting shank 21 and the slot side wall of the mounting slot 11, thereby improving the reliability of the drill bit structure 100.

[0059] Optionally, the connecting hole 12 is provided with two, the two connecting holes 12 are arranged in a spaced manner along the opening direction of the mounting slot 11, and the number of the positioning pins is equal to the number of the connecting holes 12. The arrangement of the two positioning pins can improve the stability of the mounting shank 21 in the mounting slot 11, and avoid the deflection of the mounting shank 21.

[0060] In other embodiments, the connecting hole 12 can also be provided with more than two, as long as the connecting strength between the drill sleeve 10 and the mounting shank 21 can be improved. When the connecting hole 12 is provided with multiple, the multiple connecting holes 12 can be arranged in the axial direction of the drill sleeve 10, or arranged in the circumferential direction of the drill sleeve 10, or arranged randomly, which is not limited here.

[0061] As Figure 1 And Figure 2 In some embodiments, the circumferential surface of the mounting shank 21 comprises a mounting flat surface 2101 and a mounting curved surface 2102, the mounting flat surface 2101 and the mounting curved surface 2102 are connected end to end, and the slot side wall of the mounting slot 11 and the mounting curved surface 2102 of the mounting shank 21 are in clearance fit when the mounting shank 21 is inserted into the mounting slot 11. When the mounting shank 21 is inserted into the mounting slot 11, the mounting flat surface 2101 can be directed towards the connecting hole 12, so that the positioning pin can abut against the mounting flat surface 2101, thereby abutting the mounting curved surface 2102 against the slot side wall of the mounting slot 11. The arrangement of the mounting flat surface 2101 can improve the stability of the positioning pin abutting against the mounting shank 21.

[0062] Optionally, the cross section of the mounting slot 11 can also be circular, in this case, the installation angle of the mounting shank 21 in the mounting slot 11 is not limited, and the installation efficiency can be improved.

[0063] In other embodiments, as Figure 3As shown, the groove side wall of the mounting groove 11 has a groove plane 1101 and a groove curved surface 1102, when the mounting handle 21 is inserted into the mounting groove 11, the mounting curved surface 2102 can abut against the groove curved surface 1102, the mounting plane 2101 is parallel to the groove plane 1101, and the connecting hole 12 penetrates to the groove plane 1101. At this time, the cross-sectional shape of the mounting groove 11 matches the cross-sectional shape of the mounting handle 21, so as to realize the radial positioning of the mounting handle 21 in the mounting groove 11, thereby improving the abutting force of the positioning pin on the mounting handle 21.

[0064] The above is only a preferred embodiment of the present application, and only the technical principle of the present application is specifically described, and these descriptions are only for explaining the principle of the present application, and cannot be explained as the limitation of the protection scope of the present application in any way. Based on the explanation herein, any modification, equivalent replacement and improvement within the spirit and principle of the present application, and other specific embodiments of the present application which can be thought by those skilled in the art without creative labor, should be included in the protection scope of the present application.

Claims

1. A drill bit structure, characterized by, The drill head structure comprises: a drill sleeve having a first positioning surface, the drill sleeve being provided with a mounting slot on one side of the first positioning surface; a drill body comprising a mounting shank, a drill rod and a positioning flange, the mounting shank and the drill rod being connected and coaxially arranged, the positioning flange being protruded from the circumferential surface of the mounting shank, the positioning flange being close to the drill rod, the mounting shank being capable of being inserted into the mounting slot, and the positioning flange being capable of abutting against the first positioning surface when the mounting shank is inserted into the mounting slot.

2. The drill bit structure of claim 1, wherein, The positioning flange is arranged around the mounting shank.

3. The drill bit structure of claim 2, wherein, The circumferential surface of the positioning flange is flush with the circumferential surface of the drill sleeve.

4. The drill bit structure of any one of claims 1 to 3, wherein, The positioning flange has a second positioning surface, the second positioning surface being arranged around the mounting shank, and the first positioning surface being arranged around the slot opening of the mounting slot, the second positioning surface being fitted to the first positioning surface when the mounting shank is inserted into the mounting slot.

5. The drill bit structure of claim 4, wherein, Both the first positioning surface and the second positioning surface are flat, the first positioning surface being perpendicular to the direction in which the mounting slot is formed, and the second positioning surface being perpendicular to the axial direction of the mounting shank.

6. The drill bit structure of claim 1, wherein, The drill sleeve is provided with connecting holes on the circumferential surface thereof, the connecting holes being penetrated to the slot side wall of the mounting slot, and the drill head structure further comprising positioning pins capable of being inserted into the connecting holes, the positioning pins being capable of abutting against the mounting shank through the connecting holes when the mounting shank is inserted into the mounting slot.

7. The drill bit structure of claim 6, wherein, The connecting holes are two, the two connecting holes being arranged at intervals along the direction in which the mounting slot is formed, and the number of the positioning pins being equal to the number of the connecting holes.

8. The drill bit structure of claim 6, wherein, The circumferential surface of the mounting shank comprises a mounting flat surface and a mounting curved surface, the mounting flat surface and the mounting curved surface being connected end to end, the slot side wall of the mounting slot and the mounting curved surface of the mounting shank being in clearance fit when the mounting shank is inserted into the mounting slot, and the positioning pins being capable of abutting against the mounting flat surface.

9. The drill bit structure of claim 8, wherein, The slot side wall of the mounting slot has a slot flat surface and a slot curved surface, the mounting curved surface being capable of abutting against the slot curved surface when the mounting shank is inserted into the mounting slot, the mounting flat surface being parallel to the slot flat surface, and the connecting holes being penetrated to the slot flat surface.

10. An electric drill, characterized in that The drill head structure further comprises a handheld member, the drill sleeve being connected to the handheld member, and the handheld member being capable of driving the drill head structure to rotate around the central axis of the drill body.

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