Hole guiding device

Abstract

The utility model provides a hole guiding device. The hole guiding device comprises a frame body; the supporting claws are arranged in pairs and are arranged at intervals in the length direction of the frame body, the ends, close to the frame body, of the supporting claws are connected with the frame body, and the two supporting claws are parallel to each other; a positioning member; the marking piece, the positioning piece and the marking piece are arranged on the two supporting claws respectively, the positioning piece and the marking piece are arranged at the ends, away from the frame body, of the supporting claws, the positioning piece and the marking piece are arranged on the sides, close to each other, of the two supporting claws respectively, and the marking piece and the positioning piece are collinear in the direction perpendicular to the length of the supporting claws. According to the utility model, the problem of large hole leading error in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of tools, and more specifically, to a hole guiding device. Background Art

[0002] For many open parts, there are already mounting holes in their internal structural parts, but there are no positioning points at the corresponding external positions. When guiding the hole positions of the structural parts from the inside to the outside, tools are needed for assistance. When the open spacing of the open product is large, a corner drill is often used to guide holes outwards from the hole positions of the structural parts. At this time, because the product material is carbon fiber, when the product has a certain thickness, the surface of the product is very likely to cause fiber delamination due to the shear stress applied by the rotating tool.

[0003] When the open of the open product is very small, most use ruler and compass construction, and use tools such as straight rulers, vernier calipers, and tape measures to draw lines and position on the product surface. This leads to low efficiency of manual line drawing. In addition, when guiding holes from the outside to the inside of the surface, due to the existence of internal structural parts, a certain normal stress is given, and fiber delamination will also occur at this time. Moreover, due to the existence of systematic errors (errors from measuring tools) and human errors (the use of tools, the selection of reference edges, etc.), the center of the hole positions led out at this time often has a large error. Summary of the Utility Model

[0004] The main purpose of the utility model is to provide a hole guiding device to solve the problem of large hole guiding errors in the prior art.

[0005] To achieve the above object, according to one aspect of the utility model, a hole guiding device is provided, which includes a frame body; a pair of claws arranged in pairs, along the length direction of the frame body, the claws are spaced apart, one end of the claw close to the frame body is connected to the frame body, and the two claws are parallel to each other; a positioning member; a marking member, the positioning member and the marking member are respectively arranged on the two claws, the positioning member and the marking member are arranged at the end of the claw far from the frame body, the positioning member and the marking member are respectively arranged on the sides of the two claws close to each other, and along the direction perpendicular to the length of the claw, the marking member and the positioning member are collinear.

[0006] Further, at least one of the claws is slidably arranged relative to the frame body.

[0007] Further, the claw and the frame body are arranged at an angle, and the claw extends along its own length direction.

[0008] Further, the length of the claw is greater than the length of the frame body; and / or the length direction of the claw is perpendicular to the length direction of the frame body.

[0009] Further, at least one claw has a first mounting structure, and the positioning member or the marking member has a second mounting structure, and the second mounting structure is detachably connected to the first mounting structure.

[0010] Further, both of the two supporting claws are provided with a first mounting structure, and the positioning member and the marking member are provided with a second mounting structure. Along the direction perpendicular to the length of the supporting claw, the two first mounting structures are collinear.

[0011] Further, a receiving groove is formed in the supporting claw, and the receiving groove provides a receiving space for the positioning member and / or the marking member.

[0012] Further, there are multiple positioning members, and at least two positioning members have different sizes and shapes. Some of the different positioning members can be selectively mounted on the first mounting structure.

[0013] Further, the frame body includes a rod body portion, and the length direction of the rod body portion is the same as the length direction of the frame body; two connecting portions, the two connecting portions are arranged at intervals on the rod body portion, and the two supporting claws are respectively arranged on the two connecting portions.

[0014] Further, the two connecting portions are arranged in parallel; and / or at least one of the connecting portions is slidably arranged relative to the rod body portion.

[0015] Further, the supporting claw includes a mounting portion connected to the frame body; a main body portion connected to the mounting portion, and the positioning member and the marking member are arranged at one end of the main body portion away from the mounting portion, and the main body portions of the two supporting claws are parallel to each other.

[0016] Further, the supporting claw further includes a transition portion, one end of the transition portion is connected to the mounting portion, and the other end of the transition portion is connected to the main body portion. The transition portion makes the distance between the two mounting portions less than the distance between the two main body portions.

[0017] Further, a weight-reducing hole is formed in the supporting claw.

[0018] Applying the technical solution of the present utility model, the following technical effects are achieved:

[0019] When it is necessary to drill a pilot hole in a part, place the supporting claws of the pilot hole drill at the position where the part needs to be drilled, and place the two supporting claws on both sides of the part respectively. Align the positioning member with the original hole on the part to realize the positioning of the supporting claws, and then mark on the other side of the part through the marking member. Since the positioning member and the marking member are collinear in the direction perpendicular to the length of the supporting claw, and the two supporting claws are parallel, when the positioning member is aligned with one side of the part, the connection line between the marking member and the positioning member will be perpendicular to the part. At this time, mark the other side of the part through the marking member, and the position marked by the marking member is the center position of the new hole. During the process of drilling the pilot hole in the part through the cooperation of the positioning member and the marking member, the stability of the part drilling can be improved, and the error can be effectively reduced. Description of the Drawings

[0020] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the attached

[0021] In the figures:

[0022] Figure 1 shows a schematic diagram of the overall structure of the pilot hole drill in an embodiment of the present utility model;

[0023] Figure 2 shows the present utility model Figure 1 a schematic diagram of the structure of the frame body therein;

[0024] Figure 3 shows Figure 1 a schematic diagram of the structure of the support claw in the present utility model.

[0025] Among them, the above-mentioned attached drawings include the following reference numerals:

[0026] 10, frame body; 11, rod body part; 12, connecting part; 20, support claw; 21, first installation structure; 22, second installation structure; 23, accommodation groove; 24, installation part; 25, main body part; 26, transition part; 27, weight reduction hole; 30, positioning part; 40, marking part. Detailed embodiments

[0027] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the attached drawings and in combination with the embodiments.

[0028] It should be pointed out that, unless otherwise specified, all technical and scientific terms used in the present utility model have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0029] In the present utility model, unless otherwise stated, the orientation terms such as "upper, lower, top, bottom" are usually in reference to the directions shown in the attached drawings, or in reference to the vertical, perpendicular or gravitational directions of the components themselves; similarly, for the convenience of understanding and description, "inside, outside" refer to the inside and outside relative to the contours of the respective components, but the above orientation terms do not limit the present utility model.

[0030] In order to solve the problem of large pilot hole error in the prior art, the present utility model provides a pilot hole drill.

[0031] See Figure 1, the pilot hole drill includes a frame body 10, a pair of support claws 20, a positioning member 30 and a marking member 40. Along the length direction of the frame body 10, the support claws 20 are arranged at intervals. One end of the support claw 20 close to the frame body 10 is connected to the frame body 10. The two support claws 20 are parallel to each other. The positioning member 30 and the marking member 40 are respectively arranged on the two support claws 20. The positioning member 30 and the marking member 40 are arranged at the end of the support claw 20 far from the frame body 10. The positioning member 30 and the marking member 40 are respectively arranged on the sides of the two support claws 20 close to each other. Along the direction perpendicular to the length of the support claw 20, the marking member 40 and the positioning member 30 are collinear.

[0032] When a pilot hole needs to be drilled in a part, place the support claws 20 of the pilot hole drill at the position where the part needs to be drilled, and place the two support claws 20 on both sides of the part respectively. Align the positioning member 30 with the original hole on the part to realize the positioning of the support claws 20, and then mark the other side of the part through the marking member 40. Since the positioning member 30 and the marking member 40 are collinear in the direction perpendicular to the length of the support claw 20, and the two support claws 20 are parallel, when the positioning member 30 is aligned with one side of the part, the connection line of the marking member 40 and the positioning member 30 will be perpendicular to the part. At this time, mark the other side of the part through the marking member 40, and the position marked by the marking member 40 is the center position of the new hole. During the process of drilling the part through the cooperation of the positioning member 30 and the marking member 40, the stability of the part drilling can be improved, and the error can be effectively reduced.

[0033] It should be noted that the frame body 10, as the main support part of the whole part, plays a role in connecting the two support claws 20. When the pilot hole drill needs to be used, the movement of the support claws 20 and the cooperation between the support claws 20 and the part can be realized by operating the bracket.

[0034] In one embodiment, the positioning member 30 is preferably a boss structure, and the surface thereof that fits with the part needs to be adjusted adaptively according to whether the surface of the part is a plane or a curved surface.

[0035] In one embodiment, the marking member 40 is preferably a scriber. Select a material with high hardness to make a scratch on the surface of the part, or graphite, lime and other materials can also be selected to draw a mark on the surface of the part. When the positioning of the marking member 40 is completed, the center position of the new hole that needs to be drilled can be scratched on the other side of the part through the scriber, so as to facilitate the subsequent drilling.

[0036] In one of the embodiments, at least one of the supporting claws 20 is slidably arranged relative to the frame body 10. To increase the stability of the marking by the marking member 40, the distance between the marking member 40 and the positioning member 30 should be close to the thickness of the part to be drilled. When multiple drillings are required and the thicknesses of the parts are different, the distance between the two supporting claws 20 needs to be adjusted. The adjustment method can be that one of the supporting claws 20 is slidably connected to the frame body 10, or both of the supporting claws 20 are slidably connected to the frame body 10. By means of the sliding connection between the supporting claws 20 and the frame body 10, the distance between the two supporting claws 20 is adjusted, which is convenient for positioning parts with different thicknesses. At the same time, since the positioning member 30 and the marking member 40 are convex structures, by adjusting the distance between the two supporting claws 20, it is also convenient for the positioning member 30 and the marking member 40 to fit with the part.

[0037] In another embodiment, the supporting claw 20 itself has a certain toughness. When the thickness of the part to be drilled is greater than the distance between the two supporting claws 20, by separating the ends of the two supporting claws 20, the distance between the ends of the two supporting claws 20 is increased, and then the part is placed to meet the positioning requirements of the part.

[0038] In this embodiment, the supporting claw 20 and the frame body 10 are arranged at an angle, and the supporting claw 20 extends along its own length direction.

[0039] When the drilling position of the part to be drilled has a certain depth, at this time, since the positioning hole cooperating with the positioning member 30 is located inside the part and at a relatively deep position, if the length of the supporting claw 20 is small, the positioning member 30 cannot cooperate with the positioning hole of the part, so the supporting claw 20 needs to have a certain extension length so that the positioning member 30 can cooperate with the positioning hole of the part.

[0040] In one of the embodiments, the length of the supporting claw 20 is greater than the length of the frame body 10. This can meet the requirement that the supporting claw 20 has a relatively long length and meet the cooperation with different parts.

[0041] In another embodiment, the length direction of the supporting claw 20 is perpendicular to the length direction of the frame body 10. In this way, the connection lines of the two supporting claws 20, the bracket, the positioning member 30 and the marking member 40 can form a rectangle, and when drilling the part, the accuracy of the marked new hole position can be further ensured.

[0042] See Figure 3 , at least one of the supporting claws 20 has a first mounting structure 21, and the positioning member 30 or the marking member 40 has a second mounting structure 22, and the second mounting structure 22 is detachably connected to the first mounting structure 21.

[0043] In order to be able to adapt to different parts, the positioning member 30 and the marking member 40 need to be adaptively modified according to different parts, and different parts can be adapted by means of detachable connection.

[0044] When the positioning member 30 is detachably connected to the supporting claw 20, it is to adapt to parts with different surfaces. Since the part to be drilled may be a flat surface or a curved surface, the fitting surface between the positioning member 30 and the part also needs to be adaptively adjusted, and a curved surface or a flat surface is selected. When the marking member 40 is detachably connected to the supporting claw 20, it is to cooperate with parts of different hardnesses. When the part is hard, it is difficult for the scriber to mark on the surface of the part. Therefore, a scriber made of materials such as graphite and lime is used to draw marks on the surface of the part. While the marking member 40 is detachably connected to the supporting claw 20 and the supporting claw 20 is slidably connected to the frame body 10, the marking member 40 can be replaced with another positioning member 30, and the surfaces of the two positioning members 30 are both in contact with the part. At this time, the distance between the two positioning members 30 is the thickness of the part, which is convenient for measuring the thickness of the part. One of the positioning member 30 and the marking member 40 can be detachably connected to the supporting claw 20, or both can be detachably connected to the supporting claw 20, and adjustments are made according to actual requirements. In order to facilitate the detachable connection between the positioning member 30 and the marking member 40 and the supporting claw 20, one of the first positioning structure and the second positioning structure is a groove structure, and the other is a convex block structure. By inserting the convex block into the groove, it is convenient to realize the detachable connection between the positioning member 30 and the marking member 40 and the supporting claw 20. At the same time, in order to increase the connection stability between the two, the groove structure and the convex block structure can be made of magnetically attracting materials.

[0045] In this embodiment, when the two supporting claws 20 both have the first mounting structure 21, along the direction perpendicular to the length of the supporting claw 20, the two first mounting structures 21 are collinear. Since the two first mounting structures 21 are collinear, the positioning member 30 and the marking member 40 mounted on the first mounting structure 21 can also be kept collinear, so as to ensure that the replaced positioning member 30 or marking member 40 is collinear, which can improve the stability of the use of the hole guiding device and ensure the hole guiding effect.

[0046] In this embodiment, a receiving groove 23 is formed on the supporting claw 20, and the receiving groove 23 provides a receiving space for the positioning member 30 and / or the marking member 40. Since the detachable connection between the marking member 40 and the positioning member 30 and the supporting claw 20 is to facilitate adaptation to different parts, during use, in order to facilitate the search for the replaceable positioning member 30 or marking member 40, a receiving groove 23 is formed on the supporting claw 20 for placing the temporarily idle positioning member 30 or marking member 40. In this way, during the use of different parts, the positioning member 30 or marking member 40 to be replaced can be found in the receiving groove 23 in the first place, thus facilitating the use of the supporting claw 20.

[0047] In this embodiment, there are multiple positioning members 30, and at least two positioning members 30 have different sizes and shapes. The positioning members 30 with different sizes and shapes can be selectively installed on the first installation structure 21. The main purpose of replacing the positioning members 30 is to cooperate with different parts. When cooperating with different parts, the size or shape of the positioning members 30 will be correspondingly changed. Therefore, at least two positioning members 30 will have different sizes and shapes. When adapting to different parts, the positioning member 30 with the highest adaptability to the part is selected, so as to improve the accuracy of positioning, and then improve the accuracy of marking, effectively reducing the use error of the pilot hole puncher.

[0048] See Figure 2 , the frame body 10 includes a rod body portion 11 and two connecting portions 12. The length direction of the rod body portion 11 is the same as the length direction of the frame body 10. The two connecting portions 12 are arranged at intervals on the rod body portion 11, and the two claw members 20 are respectively arranged on the two connecting portions 12.

[0049] It should be noted that the frame body 10 serves as the main body portion 25 to play the role of a framework, and is also the main holding portion of the operator. The two connecting portions 12 are respectively used to connect with the two claw members 20. During the installation process of the claw members 20, the connecting portions 12 play a positioning role, facilitating the installation of the claw members 20 at the fixed positions of the frame body 10.

[0050] In the present utility model, the two connecting portions 12 are arranged in parallel. In order to facilitate the connection between the connecting portions 12 and the claw members 20, the connection methods of the two claw members 20 and the two connecting portions 12 should be the same. Since the connection methods are the same and the connecting portions 12 and the claw members 20 are the same, the two connecting portions 12 are kept parallel before installation, so that the two claw members 20 are parallel after connection, reducing the installation difficulty of the claw members 20.

[0051] In the present utility model, at least one of the connecting portions 12 is slidably arranged relative to the rod body portion 11. Since the claw members 20 are installed on the connecting portions 12, by slidably arranging the connecting portions 12 relative to the rod body, it is convenient to adjust the distance between the two claw members 20, so as to facilitate the adaptation to different parts. In this case, the frame body 10 can select a vernier caliper, and directly install the two claw members 20 on the vernier caliper to become a pilot hole puncher, facilitating the manufacture of the pilot hole puncher.

[0052] See Figure 3 , the claw member 20 includes an installation portion 24 and a main body portion 25. The installation portion 24 is connected to the frame body 10, the main body portion 25 is connected to the installation portion 24, the positioning member 30 and the marking member 40 are arranged at one end of the main body portion 25 away from the installation portion 24, and the main body portions 25 of the two claw members 20 are parallel to each other.

[0053] It should be noted that the installation part 24 is mainly used for installation and connection. By setting connectors on the installation part 24, the installation part 24 is installed on the frame body 10, and then the connection of the support claws 20 is realized. The positioning part 30 and the marking part 40 are installed on the main body part 25. During the installation process of the installation part 24, the two main body parts 25 need to be kept parallel to ensure the stability and accuracy of the positioning part 30 and the marking part 40 during operation.

[0054] In this embodiment, the support claw 20 further includes a transition part 26. One end of the transition part 26 is connected to the installation part 24, and the other end of the transition part 26 is connected to the main body part 25. The transition part 26 makes the distance between the two installation parts 24 smaller than the distance between the two main body parts 25.

[0055] Since the marking part 40 and the positioning part 30 are protruding structures, when the distance between the two support claws 20 can be adjusted, in order to prevent the positioning part 30 and the marking part 40 from colliding during the adjustment of the support claws 20, when the two installation parts 24 approach each other, there needs to be a buffer distance between the two main body parts 25. This results in a non-linear structure of the support claws 20, and the transition part 26 is required to achieve this transition distance. When the frame body 10 is a vernier caliper, the installation part 24 is installed on the measuring jaws of the vernier caliper. When the measuring jaws of the vernier caliper are at the zero scale, the distance between the positioning part 30 and the marking part 40 on the support claws 20 is zero. In this way, during subsequent use, the distance between the positioning part 30 and the marking part 40 is the thickness of the part, which is convenient for measuring the thickness of the part.

[0056] In the present utility model, a weight-reducing hole is provided on the support claw 20. The weight-reducing hole can be opened along the length direction of the support claw 20. Through the weight-reducing hole, the weight of the support claw 20 can be reduced, the weight of the entire hole-drilling guide can be reduced, the load on the operator's hand can be reduced, which is convenient for the operator to use. At the same time, the material of the support claw 20 can also be saved.

[0057] From the above description, it can be seen that the above embodiments of the present utility model achieve the following technical effects:

[0058] 1. When it is necessary to drill a pilot hole in a part, place the claws 20 of the pilot hole drill at the position where the part needs to be drilled, and place the two claws 20 on both sides of the part respectively. Align the positioning member 30 with the original hole on the part to position the claws 20, and then mark on the other side of the part through the marking member 40. Since the positioning member 30 and the marking member 40 are collinear in the direction perpendicular to the length of the claws 20, and the two claws 20 are parallel, when the positioning member 30 is aligned with one side of the part, the line connecting the marking member 40 and the positioning member 30 will be perpendicular to the part. At this time, mark the other side of the part through the marking member 40, and the position marked by the marking member 40 is the center position of the new hole. During the process of drilling the pilot hole in the part through the cooperation of the positioning member 30 and the marking member 40, the stability of the part drilling can be improved, and the error can be effectively reduced.

[0059] 2. The frame 10 serves as the main support part of the whole part and plays a role in connecting the two claws 20. When it is necessary to use the pilot hole drill, the movement of the claws 20 and the cooperation between the claws 20 and the part can be realized by operating the bracket. The positioning member 30 is preferably a convex platform structure, and the surface of it that fits with the part needs to be adjusted adaptively according to whether the surface of the part is flat or curved; the marking member 40 is preferably a scriber. Select a material with high hardness to make a scratch on the surface of the part, or graphite, lime and other materials can also be selected to draw a mark on the surface of the part. When the positioning of the marking member 40 is completed, the center position of the new hole to be drilled can be scratched on the other side of the part through the scriber, so as to facilitate the subsequent drilling.

[0060] 3. In order to increase the stability of the marking by the marking member 40, the distance between the marking member 40 and the positioning member 30 should be close to the thickness of the part to be drilled. When multiple pilot holes need to be drilled and the thickness of the part is different, the distance between the two claws 20 needs to be adjusted. The adjustment method can be that one of the claws 20 is slidably connected to the frame 10, or both claws 20 are slidably connected to the frame 10. By the way of the sliding connection between the claws 20 and the frame 10, the distance between the two claws 20 is adjusted to facilitate the positioning of parts with different thicknesses. At the same time, since the positioning member 30 and the marking member 40 are convex structures, by adjusting the distance between the two claws 20, it is also convenient for the positioning member 30 and the marking member 40 to fit with the part.

[0061] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present utility model. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0063] It should be noted that the terms "first", "second", etc. in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present utility model described herein can be implemented in an order other than those illustrated or described herein.

[0064] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A hole guiding device, characterized in that, Comprising: A frame body (10); A pair of supporting claws (20) arranged in pairs, along the length direction of the frame body (10), the supporting claws (20) are arranged at intervals, one end of the supporting claw (20) close to the frame body (10) is connected to the frame body (10), and the two supporting claws (20) are parallel to each other; A positioning member (30); A marking member (40), the positioning member (30) and the marking member (40) are respectively arranged on the two supporting claws (20), the positioning member (30) and the marking member (40) are arranged at one end of the supporting claw (20) far from the frame body (10), the positioning member (30) and the marking member (40) are respectively arranged on one side of the two supporting claws (20) close to each other, along the direction perpendicular to the length of the supporting claw (20), the marking member (40) is collinear with the positioning member (30).

2. The pilot hole drill according to claim 1, characterized in that, At least one of the supporting claws (20) is slidably arranged relative to the frame body (10), the supporting claw (20) is arranged at an angle with the frame body (10), and the supporting claw (20) extends along its own length direction; The length of the supporting claw (20) is greater than the length of the frame body (10); and / or The length direction of the supporting claw (20) is perpendicular to the length direction of the frame body (10).

3. The pilot hole drill according to claim 1, characterized in that, At least one of the supporting claws (20) has a first mounting structure (21), the positioning member (30) or the marking member (40) has a second mounting structure (22), and the second mounting structure (22) is detachably connected to the first mounting structure (21).

4. The pilot hole drill according to claim 3, characterized in that, Both of the two supporting claws (20) have a first mounting structure (21), the positioning member (30) and the marking member (40) have a second mounting structure (22), and along the direction perpendicular to the length of the supporting claw (20), the two first mounting structures (21) are collinear.

5. The pilot hole drill according to claim 3, characterized in that, A receiving groove (23) is formed on the supporting claw (20), and the receiving groove (23) provides a receiving space for the positioning member (30) and / or the marking member (40).

6. The pilot hole drill according to claim 4, wherein There are multiple positioning members (30), at least two positioning members (30) have different sizes and shapes, and some of the different positioning members (30) can be selectively mounted on the first mounting structure (21).

7. The pilot hole drill according to any one of claims 1-6, characterized in that, The frame body (10) includes: A rod body portion (11), the length direction of the rod body portion (11) is the same as the length direction of the frame body (10); Two connecting portions (12), the two connecting portions (12) are arranged at intervals on the rod body portion (11), and the two supporting claws (20) are respectively arranged on the two connecting portions (12).

8. The pilot hole drill according to claim 7, wherein The two connecting portions (12) are arranged in parallel; and / or At least one of the connecting portions (12) is slidably arranged relative to the rod body portion (11).

9. The pilot hole drill according to any one of claims 1-6, characterized in that, The supporting claw (20) includes: A mounting portion (24), the mounting portion (24) is connected to the frame body (10); The main body part (25), the main body part (25) is connected to the mounting part (24), the positioning member (30) and the marking member (40) are arranged at one end of the main body part (25) away from the mounting part (24), and the main body parts (25) of the two pawls (20) are parallel to each other; The transition part (26), one end of the transition part (26) is connected to the mounting part (24), the other end of the transition part (26) is connected to the main body part (25), and the transition part (26) makes the distance between the two mounting parts (24) less than the distance between the two main body parts (25).

10. The pilot hole drill according to any one of claims 1-6, characterized in that, A weight reduction hole is formed in the pawl (20).

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