High-speed steel thread handle twist drill with extensible handle

Abstract

The utility model relates to the field of machining, in particular to a high-speed steel thread handle twist drill with an extendable cutter handle, which comprises a cutter handle, the lower end face of the cutter handle is fixedly connected with an inner square shaft, and a plurality of insertion holes are formed in the front end of the inner square shaft; a square shaft groove is formed in the upper end face of the drill rod, and an inner square shaft is correspondingly inserted into the square shaft groove; a clamping sleeve groove is formed in the front end of the drill rod, a length adjusting device is arranged in the clamping sleeve groove in a sleeved mode, the length adjusting device comprises a drawing block, a plurality of inserting sleeves are fixedly connected to the lower end face of the drawing block, inserting springs are fixedly connected to the inner end faces of the inserting sleeves, inserting rods are fixedly connected to the lower ends of the inserting springs, and the inserting rods are correspondingly inserted into the inserting holes. The drill bit has the advantages that the length adjusting device is arranged, so that the drill bit can adapt to drilling holes with different depth requirements by adjusting the length of the cutter handle when the drilling holes with different depths are required, and the application range of the drill bit is expanded.

Description

Technical Field

[0001] The utility model relates to the field of mechanical processing, in particular to a high-speed steel threaded shank twist drill with an extendable shank. Background Art

[0002] A twist drill is a tool that drills a circular hole in a workpiece by rotating it relative to a fixed axis. It is named because its chip groove is spiral and resembles a twist. The spiral groove can have 2, 3 or more grooves, but 2 grooves are the most common. Twist drills can be clamped on manual or electric handheld drilling tools or drilling machines, milling machines, lathes and even machining centers. The drill bit material is generally high-speed tool steel or carbide.

[0003] When using a traditional twist drill, it may not reach the corresponding depth requirement when drilling some holes due to the deep drilling requirement, and it is not easy to adjust it, which affects the use range of the drilling. Therefore, the utility model proposes a high-speed steel threaded shank twist drill with an extendable shank to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a high-speed steel threaded shank twist drill with an extendable shank to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed steel threaded shank twist drill with an extendable shank, comprising a shank, the lower end face of the shank is fixedly connected to an inner square shaft, the front end of which is provided with a plurality of plug-in holes; a drill rod, the upper end face of the drill rod is provided with a square shaft groove, and the inner square shaft is correspondingly plugged into the square shaft groove; the front end of the drill rod is provided with a ferrule groove, and a length adjustment device is sleeved in the ferrule groove, the length adjustment device comprises a pull-out block, the lower end face of the pull-out block is fixedly connected to a plurality of plug-in sleeves, the inner end face of the plug-in sleeve is fixedly connected to a plug-in spring, the lower end of the plug-in spring is fixedly connected to a plug-in rod, and the plug-in rod is correspondingly plugged into the plug-in hole.

[0006] Preferably, a plug-in sleeve is provided in the ferrule groove, a pull-out block is fixedly connected to the upper end of the plug-in sleeve, a plurality of tension springs are fixedly connected to the lower end of the pull-out block, the lower end of the tension spring is fixedly connected to the outer end of the drill rod, and a plug-in sleeve is provided in the inner sleeve of the tension spring.

[0007] Preferably, both side ends of the knife handle are fixedly connected with fixing frames, the lower end of the fixing frames is fixedly connected with a stabilizing rod, and the lower end of the stabilizing rod is fixedly connected with a limiting block.

[0008] Preferably, the drill rod is fixedly connected with a stabilizing sleeve on the left and right sides of the upper end surface, and a stabilizing rod is provided inside the stabilizing sleeve.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] The utility model provides a length adjustment device, so that when drilling holes of different depths are required, the length of the tool handle can be adjusted, so that the drill bit can adapt to drilling holes of different depths, thereby expanding the use range of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a partial structural schematic diagram of the utility model;

[0013] Figure 3 It is a schematic diagram of the connection of some structures of the utility model;

[0014] Figure 4 It is a cutaway schematic diagram of the utility model;

[0015] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0016] In the figure: 1 drill rod, 2 tool handle, 3 fixing frame, 4 stabilizing rod, 5 stabilizing sleeve, 6 limit block, 7 pulling block, 8 inner square shaft, 9 plug-in hole, 10 square shaft groove, 11 pulling spring, 12 plug-in rod, 13 plug-in sleeve, 14 plug-in spring, 15 ferrule groove. DETAILED DESCRIPTION

[0017] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0021] See also Figures 1 to 5 The utility model provides a technical solution: a high-speed steel threaded shank twist drill with an extendable shank, comprising a shank 2, the lower end face of the shank 2 is fixedly connected with an inner square shaft 8, and the front end thereof is provided with a plurality of plug-in holes 9; a drill rod 1, the upper end face of the drill rod 1 is provided with a square shaft groove 10, and the inner square shaft 8 is correspondingly plugged into the square shaft groove 10; a ferrule groove 15 is provided at the front end of the drill rod 1, and a length adjustment device is sleeved in the ferrule groove 15, and the length adjustment device comprises a pulling block 7, the lower end face of the pulling block 7 is fixedly connected with a plurality of plug-in sleeves 13, the inner end face of the plug-in sleeve 13 is fixedly connected with a plug-in spring 14, the lower end of the plug-in spring 14 is fixedly connected with a plug-in rod 12, and the plug-in rod 12 is correspondingly plugged into the plug-in hole 9.

[0022] The tool handle 2 is used to fix the twist drill on the motor, the drill rod 1 is used to drill holes while rotating, and the plug-in rod 12 is plugged into the plug-in hole 9 to fix the inner square shaft 8 and the drill rod 1. The inner square shaft 8 can drive the drill rod 1 to achieve synchronous rotation.

[0023] A plug-in sleeve 13 is sleeved inside the ferrule groove 15, a pull-out block 7 is fixedly connected to the upper end of the plug-in sleeve 13, a plurality of tension springs 11 are fixedly connected to the lower end of the pull-out block 7, the lower end of the tension spring 11 is fixedly connected to the outer end of the drill pipe 1, and a plug-in sleeve 13 is sleeved inside the tension spring 11.

[0024] Pulling the pulling block 7 can make the plug-in rod 12 disengage from the plug-in hole 9. At this time, the insertion depth of the drill rod 1 in the inner square shaft 8 can be adjusted. Under the action of the retraction spring 11, the plug-in can be fixed. The setting of the plug-in sleeve 13 makes it possible for part of the plug-in rod 12 to correspond to the inner square shaft 8 and there is no corresponding plug-in hole 9, but the plug-in rod 12 can be retracted into the plug-in sleeve 13 to ensure the stability of the pulling block 7.

[0025] The two side ends of the tool handle 2 are fixedly connected with a fixing frame 3, the lower end of the fixing frame 3 is fixedly connected with a stabilizing rod 4, the lower end of the stabilizing rod 4 is fixedly connected with a limiting block 6, and the drill rod 1 is fixedly connected with a stabilizing sleeve 5 on the left and right sides of the upper end surface, and the stabilizing sleeve 5 is provided with a stabilizing rod 4 inside.

[0026] The stabilizing rod 4 is stably inserted in the stabilizing sleeve 5, which can prevent excessive vibration when the drill rod 1 rotates and ensure stability when adjusting the insertion depth of the drill rod 1.

[0027] In actual use, when the length adjustment is required, pulling the pull-out block 7 can make the plug-in rod 12 disengage from the plug-in hole 9. At this time, the insertion depth of the drill rod 1 in the inner square shaft 8 can be adjusted, and the plug-in can be fixed under the action of the retraction spring 11. The setting of the plug-in sleeve 13 allows the plug-in rod 12 to be retracted into the plug-in sleeve 13 when part of the plug-in rod 12 corresponds to the inner square shaft 8 and there is no corresponding plug-in hole 9, so as to ensure the stability of the pull-out block 7. The lower end of the stabilizing rod 4 is fixedly connected to the limiting block 6, and the drill rod 1 is fixedly connected to the stabilizing sleeve 5 on the left and right sides of the upper end surface. The stabilizing sleeve 5 is provided with a stabilizing rod 4, and the stabilizing rod 4 is stably plugged into the stabilizing sleeve 5, which can prevent excessive vibration when the drill rod 1 rotates and ensure stability when the insertion depth of the drill rod 1 is adjusted.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high speed steel threaded shank twist drill with an extendable shank, characterized in that: include A knife handle (2), wherein the lower end surface of the knife handle (2) is fixedly connected to an inner square shaft (8) and a front end of the knife handle (2) is provided with a plurality of plug holes (9); A drill rod (1), wherein the upper end surface of the drill rod (1) is provided with a square shaft groove (10), and an inner square shaft (8) is correspondingly inserted into the square shaft groove (10); The front end of the drill rod (1) is provided with a ferrule groove (15), and a length adjustment device is sleeved inside the ferrule groove (15). The length adjustment device comprises a pull-out block (7), and a plurality of plug-in sleeves (13) are fixedly connected to the lower end surface of the pull-out block (7). A plug-in spring (14) is fixedly connected to the inner end surface of the plug-in sleeve (13), and a plug-in rod (12) is fixedly connected to the lower end of the plug-in spring (14), and the plug-in rod (12) is correspondingly plugged into the plug-in hole (9).

2. A high speed steel threaded shank twist drill with an extendable shank according to claim 1, characterized in that: The ferrule groove (15) is provided with a plug-in sleeve (13) inside, the upper end of the plug-in sleeve (13) is fixedly connected to a pull-out block (7), the lower end of the pull-out block (7) is fixedly connected to a plurality of tension springs (11), the lower end of the tension spring (11) is fixedly connected to the outer end of the drill rod (1), and the plug-in sleeve (13) is provided inside the tension spring (11).

3. A high speed steel threaded shank twist drill with an extendable shank according to claim 1, characterized in that: The two side ends of the knife handle (2) are fixedly connected to a fixing frame (3), the lower end of the fixing frame (3) is fixedly connected to a stabilizing rod (4), and the lower end of the stabilizing rod (4) is fixedly connected to a limiting block (6).

4. A high speed steel threaded shank twist drill with an extendable shank according to claim 1, characterized in that: The drill rod (1) is fixedly connected with a stabilizing sleeve (5) on both sides of the upper end surface, and a stabilizing rod (4) is sleeved inside the stabilizing sleeve (5).

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