Miniature thread tapping tool for use in narrow spaces

Abstract

The utility model belongs to the field of thread tapping, and particularly relates to a miniature thread tapping tool used in a narrow space, which comprises a telescopic rod A, one end of the telescopic rod A is fixedly connected with a clamping piece set A, the interior of one end of the clamping piece set A is rotationally connected with a sleeve, the two sides of the sleeve are fixedly connected with connecting pieces, one ends of the connecting pieces are fixedly connected with a clamping piece set B, one end of the clamping piece set B is fixedly connected with a telescopic rod B, and one end of the telescopic rod B is fixedly connected with a connecting cylinder. The multi-angle universal adjusting function of the tool is achieved through the structural design that the sleeve is rotationally connected with the clamping piece set A and the clamping piece set B. When an external electric drill drives the hexagonal column B, the sleeve freely rotates in the clamping piece set A, the connecting piece drives the clamping piece set B and the tapping head to flexibly adjust the tapping angle in the narrow space, the problem that a traditional rigid tool cannot be deeply operated due to space limitation is solved, and the tapping efficiency in the narrow area is improved.

Description

Technical Field

[0001] This utility model relates to the field of thread tapping, specifically a miniature thread tapping tool for use in narrow spaces. Background Technology

[0002] A thread tapping tool is a metal cutting tool used to machine internal threads. It is primarily used to cut threads in holes so that they can be used with other threaded parts (such as bolts or screws). Common thread tapping tools include taps and tap wrenches.

[0003] In the prior art, such as in publication number CN220330162U, an internal thread tapping device is disclosed, which includes a tapping base, a tapping body, a control handle, a control block, a tapping slider, a tapping shaft, a tapping fastening mechanism, and a fastening and fixing mechanism; the tapping body is fixedly connected to the upper end face of the tapping base; the control handle is rotatably connected to the right end face of the tapping body; the control block is fixedly connected to the control handle; the tapping slider is slidably connected inside the tapping body; the tapping shaft is rotatably connected inside the tapping slider; the tapping fastening mechanism is disposed inside the tapping base; and the fastening and fixing mechanism is disposed inside the tapping body.

[0004] While the aforementioned patent eliminates the need for manual material fixing by employing a tapping and fastening mechanism, ensuring material stability during tapping, some tapping locations are situated in narrow spaces, preventing the tapping device from penetrating deeply and causing inconvenience. Furthermore, varying hole diameters and thread textures necessitate changing the tap head as required, a complex process that impacts operational efficiency. Therefore, this paper proposes a miniature tapping tool specifically designed for use in narrow spaces to address these issues. Utility Model Content

[0005] To address the shortcomings of existing technologies, some locations requiring thread tapping are situated within narrow spaces containing materials, making it difficult for tapping devices to penetrate deep into these spaces, thus hindering thread tapping. Furthermore, the different requirements for tapping hole diameter and thread texture necessitate the replacement of tap heads as needed, which is a complex process that impacts operational efficiency. This invention proposes a miniature thread tapping tool specifically designed for use in narrow spaces.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The miniature thread tapping tool for use in narrow spaces described in this utility model includes an A telescopic rod; one end of the A telescopic rod is fixedly connected to an A clamping plate group, one end of the A clamping plate group is rotatably connected to a sleeve, two sides of the sleeve are fixedly connected to connecting plates, one end of the connecting plates is fixedly connected to a B clamping plate group, one end of the B clamping plate group is fixedly connected to a B telescopic rod, one end of the B telescopic rod is fixedly connected to a connecting cylinder; an A hexagonal post is inserted into the connecting cylinder, two sides of the top of the A hexagonal post are provided with fixing holes, springs are provided inside the fixing holes, one end of the springs is provided with limit beads, the connecting cylinder is provided with an internal hexagonal groove adapted to the A hexagonal post, a tap head is provided at the bottom of the A hexagonal post, and the other end of the A telescopic rod is provided with a B hexagonal post.

[0007] Preferably, the sleeve is rotatably connected to the A clamping plate group via a bearing, and the two ends of the connecting plate are fixedly connected to the outer wall of the sleeve and the B clamping plate group, respectively.

[0008] Preferably, the inner wall of the internal hexagonal groove is provided with a longitudinal arc-shaped groove in an axisymmetric manner, and the arc-shaped contour of the longitudinal arc-shaped groove is in contact with the spherical surface of the limiting bead.

[0009] Preferably, the bottom of the longitudinal arc-edge groove is a continuous smooth curved surface, and the limiting bead forms an elastic snap-fit ​​structure with the longitudinal arc-edge groove under the action of the spring.

[0010] Preferably, the B telescopic rod and the connecting cylinder are fixedly connected by threads, and the outer hexagonal contour of the B hexagonal column matches the chuck of the external electric drill equipment.

[0011] Preferably, both the A telescopic rod and the B telescopic rod are multi-section nested plug-in structures, and the telescopic length is fixed between adjacent sections by locking bolts.

[0012] The advantages of this utility model are:

[0013] 1. This utility model achieves multi-angle universal adjustment of the tool through the rotating connection structure between the sleeve and the A and B clamping plates. When the external electric drill drives the B hexagonal column, the sleeve rotates freely within the A clamping plate group, allowing the connecting plate to drive the B clamping plate group and the tap head to flexibly adjust the tapping angle in a narrow space. This solves the problem that traditional rigid tools cannot be operated deeply due to space limitations, thus improving tapping efficiency in narrow areas.

[0014] 2. This utility model achieves rapid tap head replacement through the elastic snap-fit ​​structure design of the A hexagonal column and the internal hexagonal groove. Pressing the limiting bead compresses the spring, allowing the A hexagonal column to be pulled out of the connecting cylinder to replace tap heads of different specifications. This solves the cumbersome problem of disassembling bolts when changing the cutting head of traditional thread tapping tools, thus shortening the replacement time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the tap head structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of clip group A and clip group B of this utility model;

[0019] Figure 4 This is a schematic diagram of the spring and limiting bead structure of this utility model.

[0020] In the diagram: 1. Telescopic rod A; 2. Clamping plate group A; 3. Sleeve; 4. Connecting plate; 5. Clamping plate group B; 6. Telescopic rod B; 7. Connecting cylinder; 8. Hexagonal post A; 9. Fixing hole; 10. Spring; 11. Limiting bead; 12. Internal hexagonal groove; 13. Arc groove; 14. Tap head; 15. Hexagonal post B. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Please see Figures 1-4As shown, a miniature thread tapping tool for use in narrow spaces includes an A telescopic rod 1; one end of the A telescopic rod 1 is fixedly connected to an A clamping plate group 2, one end of the A clamping plate group 2 is rotatably connected to a sleeve 3, both sides of the sleeve 3 are fixedly connected to connecting plates 4, one end of the connecting plates 4 is fixedly connected to a B clamping plate group 5, one end of the B clamping plate group 5 is fixedly connected to a B telescopic rod 6, one end of the B telescopic rod 6 is fixedly connected to a connecting cylinder 7; an A hexagonal prism 8 is inserted into the connecting cylinder 7, the top of the A hexagonal prism 8 has fixing holes 9 on both sides, the fixing holes 9 are provided with springs 10, one end of the springs 10 is provided with limit beads 11, the connecting cylinder 7 has an internal hexagonal groove 12 adapted to the A hexagonal prism 8, the bottom of the A hexagonal prism 8 is provided with a tap head 14, and the other end of the A telescopic rod 1 is provided with a B hexagonal prism 15;

[0023] During operation, the drill chuck clamps the B hexagonal post 15. After starting the drill, the power is transmitted to the A collet group 2 via the A telescopic rod 1. The sleeve 3 rotates freely within the A collet group 2 and drives the B collet group 5 to deflect at an angle via the connecting piece 4. The B telescopic rod 6 transmits the torque to the A hexagonal post 8 via the connecting cylinder 7 to drive the tap 14 to tap. When working in a narrow space, manually bend the A / B collet group to rotate the sleeve 3 and adjust the tool's direction. When changing the tap 14, press the limit bead 11 to compress the spring 10 so that the A hexagonal post 8 can be disengaged from the internal hexagonal groove 12 and pulled out. The universal joint structure of the sleeve 3 and the telescopic rod combination allow the tool to be adjusted within a 150° range, improving the tapping efficiency in narrow spaces.

[0024] Furthermore, the sleeve 3 is rotatably connected to the A clamping plate group 2 via a bearing, and the two ends of the connecting plate 4 are fixedly connected to the outer wall of the sleeve 3 and the B clamping plate group 5, respectively.

[0025] During operation, the outer wall of the sleeve 3 is interference-fitted with the mounting hole of the A clamping plate group 2 through a deep groove ball bearing. The connecting plate 4 is welded to both sides of the sleeve 3 and extends to the fixing groove of the B clamping plate group 5. When tapping, the sleeve 3 rotates freely around the axis of the A clamping plate group 2 under the support of the bearing, ensuring that the torque transmission is not affected by the angle deflection. The bearing connection reduces the coefficient of friction of the sleeve 3 rotation.

[0026] Furthermore, the inner wall of the internal hexagonal groove 12 is provided with a longitudinal arc edge groove 13 in an axisymmetric manner, and the arc edge contour of the longitudinal arc edge groove 13 is in contact with the spherical surface of the limiting bead 11.

[0027] During operation, when the hexagonal post 8 is inserted into the connecting cylinder 7, the limiting bead 11 is pushed into the longitudinal arc groove 13 by the spring 10. During the tapping process, the limiting bead 11 rolls along the curved surface of the arc groove 13, which limits the axial displacement of the hexagonal post 8 while allowing it to move slightly along the longitudinal direction of the groove to compensate for vibration errors.

[0028] Furthermore, the bottom of the longitudinal arc-edge groove 13 is a continuous smooth curved surface, and the limiting bead 11 forms an elastic snap-fit ​​structure with the longitudinal arc-edge groove 13 under the action of the spring 10.

[0029] During operation, when disassembling the tap head 14, pull the hexagonal column A 8 outward. The limit bead 11 is guided by the curved surface of the longitudinal arc groove 13 to compress the spring 10 until it is completely removed from the groove. During installation, push it in the opposite direction so that the limit bead 11 automatically snaps into the arc groove 13. The whole process does not require the assistance of tools. The elastic snap-fit ​​structure reduces the operation time for replacing the tap head 14.

[0030] Furthermore, the B telescopic rod 6 and the connecting cylinder 7 are fixedly connected by threads, and the outer hexagonal profile of the B hexagonal column 15 matches the chuck of the external electric drill equipment;

[0031] During operation, the external thread at the end of the B telescopic rod 6 is screwed into the internal thread hole at the bottom of the connecting cylinder 7 and a preload of 30 N·m is applied. The hexagonal side-to-side dimensions of the B hexagonal column 15 match the standard clamping range of the electric drill chuck, 6.35-12.7 mm, enabling plug-and-play functionality.

[0032] Furthermore, both telescopic rod A 1 and telescopic rod B 6 are multi-section nested plug-in structures, with the telescopic length fixed between adjacent sections by locking bolts;

[0033] During operation, both telescopic rod A1 and telescopic rod B6 are composed of two nested sleeves with decreasing diameters. When adjusting, loosen the locking bolt, pull out the inner sleeve to the required length, and then lock it. The telescopic adjustment range is 80-250mm, which is suitable for tapping holes of different depths.

[0034] Working principle: When the external electric drill drives the B hexagonal column 15 to rotate, the power is transmitted to the A clamping plate group 2 through the A telescopic rod 1, which drives the sleeve 3 to rotate freely under the support of the bearing. The sleeve 3 transmits the torque to the connecting sleeve 7 through the connecting plate 4, which links the B clamping plate group 5 and the B telescopic rod 6. This forces the A hexagonal column 8, which is inserted into the internal hexagonal groove 12, to drive the tap head 14 to rotate and tap. When operating in a narrow space, the A / B clamping plate group can be manually bent to form a universal joint structure between the sleeve 3 and the connecting plate 4 to adjust the tool angle. When changing the tap head 14, the limit bead 11 is pressed to compress the spring 10 so that it is disengaged from the longitudinal arc edge groove 13, and the A hexagonal column 8 can be pulled out. At the same time, the multi-section nested structure of the telescopic rod is fixed in length by the locking bolt to adapt to different depth holes, realizing the coordinated operation of high-precision thread processing and quick tool change in narrow spaces.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A miniature thread tapping tool for use in narrow spaces, characterized in that: Includes an A telescopic rod (1); one end of the A telescopic rod (1) is fixedly connected to an A clamping plate group (2), one end of the A clamping plate group (2) is rotatably connected to a sleeve (3), both sides of the sleeve (3) are fixedly connected to connecting plates (4), one end of the connecting plate (4) is fixedly connected to a B clamping plate group (5), one end of the B clamping plate group (5) is fixedly connected to a B telescopic rod (6), and one end of the B telescopic rod (6) is fixedly connected to a connecting cylinder (7). The connecting cylinder (7) has an A hexagonal post (8) inserted inside. The top of the A hexagonal post (8) has two fixing holes (9) on both sides. The fixing holes (9) have springs (10) inside. One end of the springs (10) has a limit bead (11). The connecting cylinder (7) has an internal hexagonal groove (12) that matches the A hexagonal post (8). The bottom of the A hexagonal post (8) has a tap (14). The other end of the A telescopic rod (1) has a B hexagonal post (15).

2. The miniature thread tapping tool for use in narrow spaces according to claim 1, characterized in that: The sleeve (3) is rotatably connected to the A clamping plate group (2) via a bearing, and the two ends of the connecting plate (4) are fixedly connected to the outer wall of the sleeve (3) and the B clamping plate group (5) respectively.

3. The miniature thread tapping tool for use in narrow spaces according to claim 1, characterized in that: The inner wall of the internal hexagonal groove (12) is provided with a longitudinal arc edge groove (13) in an axisymmetric manner, and the arc edge contour of the longitudinal arc edge groove (13) is in contact with the spherical surface of the limiting bead (11).

4. The miniature thread tapping tool for use in narrow spaces according to claim 3, characterized in that: The bottom of the longitudinal arc edge groove (13) is a continuous smooth curved surface, and the limiting bead (11) forms an elastic snap-fit ​​structure with the longitudinal arc edge groove (13) under the action of the spring (10).

5. The miniature thread tapping tool for use in narrow spaces according to claim 1, characterized in that: The B telescopic rod (6) and the connecting cylinder (7) are fixedly connected by threads, and the outer hexagonal contour of the B hexagonal column (15) matches the chuck of the external electric drill equipment.

6. The miniature thread tapping tool for use in narrow spaces according to claim 1, characterized in that: Both the A telescopic rod (1) and the B telescopic rod (6) are multi-section nested plug-in structures, and the telescopic length is fixed between adjacent sections by locking bolts.

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