Universal tapping chuck

Abstract

This utility model discloses a universal tapping chuck, which mainly includes a connecting sleeve, a collet, a tap, and an auxiliary mechanism that are inserted into the end of a hand drill. The auxiliary mechanism includes a detachable threaded telescopic rod and an annular positioning plate. The rotation of the end of the hand drill drives the connecting sleeve and the collet to rotate synchronously. The collet clamps the tap, and the annular positioning plate keeps the tap perpendicular to the tapping surface. The rotation of the connecting sleeve drives the threaded telescopic rod to extend and retract. The threaded telescopic rod applies constant pressure to the tap by retracting at a uniform speed. This utility model solves the problem of difficulty in controlling the tapping angle and tapping pressure in manual tapping operations, and can effectively improve the stability of manual tapping operations, improve work efficiency, and improve product quality.

Description

Technical Field

[0001] This application relates to the field of sand washing technology, specifically to a universal tapping chuck. Background Technology

[0002] A general-purpose tapping chuck is a core tool accessory that holds a tap and transmits rotational torque through an elastic or mechanical structure. It typically incorporates a floating compensation mechanism (such as a spring or ratchet) to automatically compensate for axial feed errors during tapping, effectively preventing tap breakage caused by asynchrony between the machine tool and the workpiece. These chucks are compatible with electric drills, drilling machines, or machining centers, significantly improving thread processing efficiency and accuracy, especially reducing manual intervention in mass production. However, existing chucks are mostly optimized for fixed tapping equipment. When faced with confined spaces (such as inside pipes or in the corners of mechanical cavities) or irregularly shaped structures that the equipment cannot access, operators are often forced to use the simple method of directly holding the tap with a hand drill. While this alternative offers flexibility, the lack of chuck angle stability and pressure buffering function makes it prone to tap misalignment, leading to thread quality defects. Furthermore, the uncontrollable nature of manual pressure application can cause tap chipping or workpiece damage, hindering the reliability and consistency of tapping processes under complex conditions. Therefore, this application designs a universal tapping chuck that can maintain the tapping angle and constant tapping pressure under electric drill conditions. Utility Model Content

[0003] The purpose of this invention is to provide a universal tapping chuck to solve the aforementioned problems.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a universal tapping chuck, including a connecting sleeve inserted into the end of an electric drill, a clamping sleeve inserted into the end of the connecting sleeve away from the electric drill, and the rear end of the tap being engaged inside the clamping sleeve; The end of the electric drill is also fitted with an auxiliary mechanism for maintaining tapping pressure and tapping angle. The auxiliary mechanism is connected to the outer periphery of the connecting sleeve via a transmission. The auxiliary mechanism includes a detachable threaded telescopic rod and an annular positioning plate; the lower side of the annular positioning plate is welded and fixed to one end of the threaded telescopic rod, the other end of the threaded telescopic rod is inserted into the end of the electric drill, the upper middle part of the threaded telescopic rod is connected to the connecting sleeve for transmission, and the annular positioning plate is parallel to the end of the electric drill. The rotation of the end of the electric drill drives the connecting sleeve and the collet to rotate synchronously. The collet holds the tap, and the annular positioning plate keeps the tap perpendicular to the tapping surface. The rotation of the connecting sleeve drives the threaded telescopic rod to extend and retract. The threaded telescopic rod applies constant pressure to the tap by contracting at a uniform speed.

[0005] The ring-shaped positioning plate, parallel to the electric drill, ensures that the tap remains perpendicular to the tapping surface during the tapping process, thereby controlling the tapping angle. Simultaneously, the threaded telescopic rod, driven by the connecting sleeve, slides during tapping, applying constant pressure to the tap and preventing workpiece damage. Furthermore, the detachable design of the threaded telescopic rod adapts to the different pressure requirements of various taps, effectively improving the stability of manual tapping operations, increasing work efficiency, and enhancing product quality.

[0006] Furthermore, a pin is provided at the rear end of the connecting sleeve, and the connecting sleeve is inserted into the end of the electric drill via the pin. A locking element is provided in the middle of the connecting sleeve to lock and fix the sleeve in place.

[0007] Furthermore, the auxiliary mechanism also includes a connecting rod, an annular plug-in plate, an annular protective cover, and a transmission assembly. One end of the connecting rod is welded and fixed to the end of the threaded telescopic rod away from the annular positioning plate, and the other end of the connecting rod is welded and fixed to the annular plug-in plate. The annular plug-in plate is plugged into the electric drill. The lower end of the annular protective cover is welded and fixed to the upper end of the threaded telescopic rod. The annular protective cover and the connecting sleeve are coaxial. The transmission assembly is positioned inside the annular protective cover.

[0008] Furthermore, the threaded telescopic rod includes an outer rod and an inner rod. One end of the inner rod is welded and fixed to the lower side of the annular positioning plate, and the other end of the inner rod is slidably connected to the inner wall of the outer rod. The end of the outer rod away from the inner rod is welded and fixed to the connecting rod. A through hole is provided at the upper end of the outer rod, extending into the annular protective cover. The transmission assembly includes a drive gear and a driven gear. The inner circumference of the drive gear is fixedly connected to the outer circumference of the connecting sleeve, and the driven gear is rotatably connected to the inner wall of the outer rod near the connecting rod via a rotating shaft.

[0009] Furthermore, the drive gear and driven gear mesh through a through hole. The drive gear is positioned within the annular protective cover. The threaded telescopic rod also includes a first mounting base, a second mounting base, a threaded rod, and a threaded sleeve. The first mounting base is fixedly installed on the side of the driven gear away from the rotating shaft, and the second mounting base is fixedly installed on the inner wall of the inner rod near the annular positioning plate. One end of the threaded rod is engaged with the first mounting base, and the other end of the threaded rod is threadedly connected to the threaded sleeve. The end of the threaded sleeve away from the threaded rod is engaged with the second mounting base. The sliding connection between the inner rod and the outer rod is equipped with a limit switch to prevent the inner rod from rotating or shifting.

[0010] Compared with existing technologies, it has the following beneficial effects: This utility model provides a universal tapping chuck. Through a ring-shaped positioning plate parallel to the electric drill, the tap and tapping surface remain perpendicular during the tapping process, thereby controlling the tapping angle. Simultaneously, a threaded telescopic rod, driven by a connecting sleeve, slides during tapping, applying constant pressure to the tap and preventing workpiece damage. Furthermore, the detachable design of the threaded telescopic rod adapts to the different pressure requirements of various taps, effectively improving the stability of manual tapping operations, increasing work efficiency, and enhancing product quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a general-purpose tapping chuck according to the present invention; Figure 2 This is a schematic diagram of the structure of a general tapping chuck according to the present invention; Figure 3 This is a schematic diagram of the connecting sleeve connection structure of a universal tapping chuck according to this utility model; Figure 4 This is a plan view of the auxiliary mechanism of a universal tapping chuck according to the present invention.

[0012] In the diagram: 1-Electric drill; 2-Connecting sleeve; 21-Pin; 22-Locking component; 3-Clamping sleeve; 4-Tap; 5-Auxiliary mechanism; 51-Connecting rod; 52-Annular plug plate; 53-Annular protective cover; 54-Transmission assembly; 541-Drive gear; 542-Driven gear; 6-Threaded telescopic rod; 61-Outer rod; 611-Through hole; 62-Inner rod; 63-First mounting base; 64-Second mounting base; 65-Threaded rod; 66-Threaded sleeve; 7-Annular positioning plate. Detailed Implementation

[0013] 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 protection scope of the present utility model.

[0014] Please see Figures 1 to 4 As shown, the present invention provides the following technical solution: a universal tapping chuck, including a connecting sleeve 2 inserted into the end of an electric drill 1, a clamping sleeve 3 inserted into the end of the connecting sleeve 2 away from the electric drill 1, and the rear end of the tap 4 being clamped inside the clamping sleeve 3. The end of the electric drill 1 is also connected to an auxiliary mechanism 5 for maintaining tapping pressure and tapping angle. The auxiliary mechanism 5 is connected to the outer periphery of the connecting sleeve 2 via a transmission. The auxiliary mechanism 5 includes a detachable threaded telescopic rod 6 and an annular positioning plate 7; the lower side of the annular positioning plate 7 is welded and fixed to one end of the threaded telescopic rod 6, the other end of the threaded telescopic rod 6 is inserted into the end of the electric drill 1, the upper middle part of the threaded telescopic rod 6 is connected to the connecting sleeve 2 for transmission, and the annular positioning plate 7 is parallel to the end of the electric drill 1. The rotation of the end of the electric drill 1 drives the connecting sleeve 2 and the clamp 3 to rotate synchronously. The clamp 3 holds the tap 4, and the annular positioning plate 7 keeps the tap 4 perpendicular to the tapping surface. The rotation of the connecting sleeve 2 drives the threaded telescopic rod 6 to extend and retract. The threaded telescopic rod 6 applies constant pressure to the tap 4 by contracting at a uniform speed.

[0015] As another embodiment, see Figures 1 to 3 As shown, the rear end of the connecting sleeve 2 is provided with a pin 21, and the connecting sleeve 2 is inserted into the end of the electric drill 1 through the pin 21. In use, after the connecting sleeve 2 is installed with the auxiliary mechanism 5, the clamp 3 and the tap 4, the pin 21 at the rear end of the connecting sleeve 2 is aligned with the end of the electric drill 1 and inserted, so that the output end of the electric drill 1 can drive the connecting sleeve 2 to rotate.

[0016] See Figure 3 A locking element 22 is provided in the middle of the connecting sleeve 2 to lock and fix the clamp 3. The locking element 22 is used to lock and fix the clamp 3. The locking is a spring pin locking type and can be unlocked. The locking structure between the connecting sleeve 2 and the clamp 3 can also be replaced with other locking structures or threaded connection structures commonly used in the art.

[0017] When using it, first insert the tap 4 into the clamp 3, then snap the clamp 3 into the end of the connecting sleeve 2 away from the pin 21, and then insert the pin 21 of the connecting sleeve 2 into the end of the electric drill 1.

[0018] As another embodiment, such as Figures 2 to 4 As shown, the auxiliary mechanism 5 also includes a connecting rod 51, an annular plug-in plate 52, an annular protective cover 53, and a transmission assembly 54. One end of the connecting rod 51 is welded and fixed to the end of the threaded telescopic rod 6 away from the annular positioning plate 7, and the other end of the connecting rod 51 is welded and fixed to the annular plug-in plate 52. The annular plug-in plate 52 is plugged into the electric drill 1. The lower end of the annular protective cover 53 is welded and fixed to the upper end of the threaded telescopic rod 6. The annular protective cover 53 is coaxial with the connecting sleeve 2. The transmission assembly 54 is positioned inside the annular protective cover 53.

[0019] Among them, the annular protective cover 53 is rotatably connected to the outer periphery of the connecting sleeve 2, and the annular plug plate 52 is a conical structure adapted to the shape of the electric drill 1. Its plug-in with the electric drill 1 is a lockable and unlockable plug-in, so that the connecting sleeve 2 will not cause the auxiliary mechanism 5 to deflect or move as a whole when performing tapping operation.

[0020] When tapping is performed, the annular positioning plate 7 is directly pressed against the tapping surface, so that the tap 4 is naturally perpendicular to the tapping surface. After the electric drill 1 is started, it drives the connecting sleeve 2 to rotate. The rotation of the connecting sleeve 2 drives the clamping sleeve 3 and the tap 4 to rotate synchronously to perform the tapping operation. At the same time, the rotation of the connecting sleeve 2 drives the transmission component 54 to rotate. The rotation of the transmission component 54 drives the threaded telescopic rod 6 to retract. The threaded telescopic rod 6 applies force to the connecting sleeve 2 through the annular protective cover 53, which ultimately transmits the pressure to the tap 4 and makes the pressure constant through the thread.

[0021] See Figure 3 and Figure 4 The threaded telescopic rod 6 includes an outer rod 61 and an inner rod 62. One end of the inner rod 62 is welded and fixed to the lower side of the annular positioning plate 7, and the other end of the inner rod 62 is slidably connected to the inner wall of the outer rod 61. The end of the outer rod 61 away from the inner rod 62 is welded and fixed to the connecting rod 51. A through hole 611 is provided at the upper end of the outer rod 61, extending into the annular protective cover 53. The detachable design of the outer rod 61 and the inner rod 62 allows the inner rod 62 to be removed separately for inspection, repair, and replacement of the structure in the outer rod 61 and the inner rod 62.

[0022] See Figure 4 The transmission assembly 54 includes a drive gear 541 and a driven gear 542; the inner circumference of the drive gear 541 is fixedly connected to the outer circumference of the connecting sleeve 2, and the driven gear 542 is rotatably connected to the inner wall of the outer rod 61 near the connecting rod 51 via a rotating shaft.

[0023] The drive gear 541 moves synchronously during the rotation of the connecting sleeve 2, and drives the driven gear 542 to rotate during the movement. The rotation of the driven gear 542 controls the extension and retraction of the threaded telescopic rod 6. After completing a single tapping operation, the electric drill 1 needs to be reversed, which causes the drive gear 541 to drive the driven gear 542 to rotate in the opposite direction, so that the threaded telescopic rod 6 moves back to its initial state.

[0024] See Figure 4 The drive gear 541 and the driven gear 542 mesh through the through hole 611, and the drive gear 541 is positioned inside the annular protective cover 53.

[0025] See Figure 4 The threaded telescopic rod 6 also includes a first mounting base 63, a second mounting base 64, a threaded rod 65, and a threaded sleeve 66; the first mounting base 63 is fixedly installed on the side of the driven gear 542 away from the rotating shaft, the second mounting base 64 is fixedly installed on the inner wall of the inner rod 62 near the annular positioning plate 7, one end of the threaded rod 65 is engaged with the first mounting base 63, the other end of the threaded rod 65 is threadedly connected to the threaded sleeve 66, and the end of the threaded sleeve 66 away from the threaded rod 65 is engaged with the second mounting base 64.

[0026] When the driven gear 542 rotates, it drives the threaded rod 65 to rotate through the first mounting plate fixed to it. Due to the fixed nature of the second mounting plate, the threaded sleeve 66 will not move, so the threaded rod 65 moves horizontally along the direction of the threaded sleeve 66 during rotation, thereby driving the outer rod 61 to move horizontally along the inner rod 62, so that the annular protective cover 53 drives the connecting sleeve 2 to apply pressure to the tap 4.

[0027] Before use, the electric drill 1 can be run idle to disengage the thread rod 65 from the thread. After removing the inner rod 62, the thread rod 65 and the thread sleeve 66 can be replaced according to the different pressures or displacement distances required by the tap 4. By inserting the thread rod 65 and the thread sleeve 66 into the first mounting base 63 and the second mounting base 64, the thread rod 65 and the thread sleeve 66 can be replaced to adapt to different tapping requirements.

[0028] It should be noted that the sliding connection between the inner rod 62 and the outer rod 61 is equipped with a limit switch to prevent the inner rod 62 from rotating or shifting.

[0029] Working principle: When tapping, the annular positioning plate 7 is directly pressed against the tapping surface, so that the tap 4 is naturally perpendicular to the tapping surface. After the electric drill 1 is started, it drives the connecting sleeve 2, the clamp 3 and the tap 4 to rotate synchronously to perform the tapping operation. At the same time, the rotation of the connecting sleeve 2 drives the transmission component 54 to rotate. The rotation of the transmission component 54 drives the threaded telescopic rod 6 to retract. The threaded telescopic rod 6 applies force to the connecting sleeve 2 through the annular protective cover 53, and finally the pressure is transmitted to the tap 4, and the pressure is kept constant through the thread.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A universal tapping chuck, characterized in that... The device includes a connecting sleeve (2) inserted into the end of the electric drill (1), and a clamp (3) is inserted into the end of the connecting sleeve (2) away from the electric drill (1), and the rear end of the tap (4) is engaged inside the clamp (3). The end of the electric drill (1) is also connected to an auxiliary mechanism (5) for maintaining tapping pressure and tapping angle, and the auxiliary mechanism (5) is connected to the outer periphery of the connecting sleeve (2). The auxiliary mechanism (5) includes a detachable threaded telescopic rod (6) and an annular positioning plate (7); the lower side of the annular positioning plate (7) is welded and fixed to one end of the threaded telescopic rod (6), the other end of the threaded telescopic rod (6) is inserted into the end of the electric drill (1), the upper middle part of the threaded telescopic rod (6) is connected to the connecting sleeve (2) for transmission, and the annular positioning plate (7) is parallel to the end of the electric drill (1); The rotation of the end of the electric drill (1) drives the connecting sleeve (2) and the clamp (3) to rotate synchronously. The clamp (3) holds the tap (4). The annular positioning plate (7) keeps the tap (4) perpendicular to the tapping surface. The rotation of the connecting sleeve (2) drives the threaded telescopic rod (6) to extend and retract. The threaded telescopic rod (6) applies constant pressure to the tap (4) by contracting at a uniform speed.

2. The universal tapping chuck according to claim 1, characterized in that, The connecting sleeve (2) is provided with a pin (21) at its rear end, and the connecting sleeve (2) is inserted into the end of the electric drill (1) through the pin (21).

3. The universal tapping chuck according to claim 1, characterized in that, The connecting sleeve (2) is provided with a locking member (22) in the middle, so as to lock and fix the clamp (3) by means of the locking member (22).

4. The universal tapping chuck according to claim 1, characterized in that, The auxiliary mechanism (5) further includes a connecting rod (51), an annular plug-in plate (52), an annular protective cover (53), and a transmission assembly (54). One end of the connecting rod (51) is welded and fixed to the end of the threaded telescopic rod (6) away from the annular positioning plate (7). The other end of the connecting rod (51) is welded and fixed to the annular plug-in plate (52). The annular plug-in plate (52) is plugged into the electric drill (1). The lower end of the annular protective cover (53) is welded and fixed to the upper end of the threaded telescopic rod (6). The annular protective cover (53) is coaxial with the connecting sleeve (2). The transmission assembly (54) is positioned inside the annular protective cover (53).

5. The universal tapping chuck according to claim 4, characterized in that, The threaded telescopic rod (6) includes an outer rod (61) and an inner rod (62). One end of the inner rod (62) is welded and fixed to the lower side of the annular positioning plate (7). The other end of the inner rod (62) is slidably connected to the inner wall of the outer rod (61). The end of the outer rod (61) away from the inner rod (62) is welded and fixed to the connecting rod (51). The upper end of the outer rod (61) has a through hole (611) that penetrates into the annular protective cover (53).

6. The universal tapping chuck according to claim 5, characterized in that, The transmission assembly (54) includes a drive gear (541) and a driven gear (542); the inner circumference of the drive gear (541) is fixedly connected to the outer circumference of the connecting sleeve (2), and the driven gear (542) is rotatably connected to the inner wall of the outer rod (61) near the connecting rod (51) via a rotating shaft.

7. The universal tapping chuck according to claim 6, characterized in that, The drive gear (541) meshes with the driven gear (542) through the through hole (611), and the drive gear (541) is positioned inside the annular protective cover (53).

8. The universal tapping chuck according to claim 6, characterized in that, The threaded telescopic rod (6) further includes a first mounting seat (63), a second mounting seat (64), a threaded rod (65), and a threaded sleeve (66); the first mounting seat (63) is fixedly mounted on the side of the driven gear (542) away from the rotating shaft, the second mounting seat (64) is fixedly mounted on the inner wall of the inner rod (62) near the annular positioning plate (7), one end of the threaded rod (65) is engaged with the first mounting seat (63), the other end of the threaded rod (65) is threadedly connected to the threaded sleeve (66), and the end of the threaded sleeve (66) away from the threaded rod (65) is engaged with the second mounting seat (64).

9. The universal tapping chuck according to claim 5, characterized in that, The sliding connection between the inner rod (62) and the outer rod (61) is provided with a limit to prevent the inner rod (62) from rotating or shifting.

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