A tap chuck tool

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By designing an adjustment mechanism, the torque of the flexible tapping chuck is infinitely adjustable, adapting to differences in material hardness. This solves the problem of tap breakage caused by imprecise torque adjustment in existing technologies and improves service life.

CN224487892UActive Publication Date: 2026-07-14ZHEJIANG JILONG MACHINERY CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: ZHEJIANG JILONG MACHINERY CO LTD
Filing Date: 2025-08-28
Publication Date: 2026-07-14

AI Technical Summary

Technical Problem

Existing flexible tapping chucks cannot precisely adapt to differences in material hardness, and the torque adjustment is not precise enough, causing the tap to easily break under high torque.

Method used

The adjustment mechanism includes an adjustment ring, a disc spring, a compression ring, an adjustment ball, and a fine-tuning component. The torque can be steplessly adjusted by rotating the adjustment nut and the knob ring. Combined with the position adjustment of the positioning spring, the torque can be precisely controlled.

Benefits of technology

It achieves stepless torque adjustment, adapts to different material hardness, avoids tap breakage due to excessive torque, and improves the service life of the tap.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224487892U_ABST

Patent Text Reader

Abstract

The utility model provides a tap chuck frock relates to tapping technical field, including shell, the main shaft sleeve of loading into shell, plug-in mechanism and adjusting mechanism, adjusting mechanism includes adjusting nut, adjusting resistance ring, butterfly spring, extruding ring, adjusting steel ball and fine adjustment subassembly, the outer wall of shell is equipped with T shape ring groove, the inner wall of T shape ring groove is equipped with the vertical slide groove who communicates with shell, the outer wall of adjusting resistance ring is provided with guide sliding block, the guide sliding block is equipped through vertical slide groove, fine adjustment subassembly includes knob ring, nut ring and fine adjustment screw ring, the downside of nut ring is provided with support ring groove, the guide sliding block rotation plug -in is in support ring groove, be provided with a plurality of thread blocks on the outer wall of fine adjustment screw ring, a plurality of thread blocks are connected in the upside of nut ring by screw threads. In the utility model, the stepless regulation of tap chuck torsion can be realized through fine adjustment subassembly, makes it more suitable for tap material hardness difference.

Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of tapping technology, specifically a tap chuck tool. Background Technology

[0002] Flexible tapping chucks, also known as floating tapping chucks, are precision fixtures designed to protect taps and compensate for errors. They are especially suitable for blind hole tapping and low-rigidity machine tool scenarios.

[0003] For example, utility model CN212443605U discloses a tapping chuck device for holding taps and applied to a tapping machine. It includes a housing, a spindle core housed within the housing, and a spring mechanism for controlling the tap. The spring mechanism is mounted on the spindle core. The housing consists of the housing itself and a ball bearing retainer to prevent the tap from breaking under torque overload. The housing and the ball bearing retainer are integrally formed. By integrally forming the housing and the ball bearing retainer, firstly, compared to the previous separate structure, the strength of the housing is increased, and unnecessary assembly steps are reduced; secondly, when the torque of the tapping machine is too high, compared to the previous separate structure, the integral structure allows for an interference fit between the housing and the spindle core, protecting the tap and preventing it from breaking due to excessive torque.

[0004] However, in the above technical solution, the torque can only be adjusted by rotating the adjusting nut and inserting the snap ring into the interval groove on the outside of the adjusting nut. This results in a range of torque adjustments, which cannot be precisely adapted to differences in material hardness. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a tap chuck fixture that solves the problems mentioned in the background section.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A tap chuck fixture for holding taps includes a housing, a spindle sleeve installed inside the housing, an insertion mechanism for inserting the tap, and an adjustment mechanism for adjusting torque. The adjustment mechanism includes an adjusting ring, a disc spring, a compression ring, an adjusting ball, and a fine-tuning assembly. The adjusting ring is slidably installed inside the housing, and the adjusting ball is horizontally slidably installed inside the housing. The adjusting ball abuts against the outer wall of the spindle sleeve, the compression ring abuts against the lower side of the adjusting ball, and the disc spring abuts between the adjusting ring and the fine-tuning assembly. The outer wall of the shell has a T-shaped annular groove, and the inner wall of the T-shaped annular groove has a vertical sliding groove that communicates with the shell. The outer wall of the adjusting ring is provided with a number of guide sliders at intervals. The guide sliders pass through the vertical sliding groove. The fine-tuning component includes a knob ring, a nut ring, and a fine-tuning screw ring. The knob ring is rotatably installed in the T-shaped annular groove. The lower side of the nut ring is provided with a support ring groove. The guide sliders are rotatably inserted into the support ring groove. The outer wall of the fine-tuning screw ring is provided with a number of threaded blocks. The number of threaded blocks are threadedly connected to the upper side of the nut ring.

[0010] Preferably, the adjusting mechanism further includes an adjusting nut, which is threadedly connected to the lower end of the housing and abuts against the lower side of the adjusting ring. The inner wall of the knob ring is provided with a plurality of lifting grooves, and the outer wall of the nut ring is provided with a guide slider that slides within the lifting grooves.

[0011] Preferably, the upper side of the inner wall of the outer shell is provided with several horizontal sliding grooves, the adjusting steel ball is slidably installed in the horizontal sliding grooves, the upper side of the extrusion ring is integrally formed with several wedge-shaped blocks that slide and insert into the horizontal sliding grooves, the inner wall of the wedge-shaped blocks is provided with an extrusion inclined surface, the extrusion inclined surface slides and abuts against the outer side of the adjusting steel ball, the outer wall of the main shaft sleeve is provided with a torque ring, the outer wall of the torque ring is provided with several torque grooves, and the adjusting steel ball abuts against the torque grooves.

[0012] Preferably, the outer wall of the adjusting nut is provided with a plurality of positioning grooves, the outer wall of the outer shell is provided with a positioning ring groove, the inner wall of the positioning ring groove is provided with a positioning hole communicating with the inside of the outer shell, a positioning snap ring is detachably sleeved on the outer side of the positioning ring groove, one end of the positioning snap ring is provided with an inwardly bent positioning part, the positioning part passes through the positioning hole and is engaged in the positioning groove.

[0013] Preferably, the insertion mechanism includes a centering sleeve, a clamping spring, and a plurality of clamping steel balls. The centering sleeve is slidably inserted into the lower side of the spindle sleeve. A limiting piece is integrally formed in the middle of the inner wall of the spindle sleeve. The clamping spring is installed between the limiting piece and the centering sleeve. A plurality of positioning holes are opened in the middle of the side wall of the centering sleeve. The clamping steel balls are slidably installed in the positioning holes. An upwardly expanding variable diameter section is provided in the middle of the inner wall of the spindle sleeve. The clamping steel balls slide against the inner wall of the variable diameter section.

[0014] (III) Beneficial Effects

[0015] This utility model provides a tap chuck fixture. It has the following beneficial effects:

[0016] 1. In this utility model, rotating the adjusting nut can be used to compress and adjust the elastic force of the disc spring, and the positioning is formed by the positioning snap ring being inserted into the positioning groove. This compresses the adjusting steel ball to achieve coarse adjustment of the torque level. Rotating the knob ring can drive the nut ring to move in a circular motion. Through the threaded engagement, the fine-tuning screw ring can slide upward and compress the disc spring, changing the pressure of the adjusting steel on the main shaft sleeve, thereby achieving stepless torque adjustment and making it more suitable for the hardness difference of the tap material. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a tap chuck tool according to the present invention;

[0018] Figure 2 This is an exploded view of a tap chuck tool according to the present invention;

[0019] Figure 3 This is a cross-sectional view of a tap chuck tooling according to the present invention.

[0020] In the diagram: 1. Outer shell; 2. Spindle sleeve; 3. Centering sleeve; 4. Clamping spring; 5. Clamping steel ball; 6. Limiting plate; 7. Variable diameter section; 8. Protrusion; 9. Vertical slide groove; 10. Connecting block; 11. Adjusting nut; 12. Adjusting abutment ring; 13. Butterfly spring; 14. Compression ring; 15. Adjusting steel ball; 16. Guide slider; 17. Knob ring; 18. Nut ring; 19. Fine-tuning screw ring; 20. Support ring groove; 21. Wedge block; 22. Torque ring; 23. Positioning groove; 24. Positioning snap ring; 25. Positioning part; 26. Threaded block. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model embodiment provides a tap chuck fixture, such as Figure 1-3 As shown, it includes a housing 1 for holding a tap, a spindle sleeve 2 installed inside the housing 1, an insertion mechanism for inserting the tap, and an adjustment mechanism for adjusting torque.

[0023] like Figure 3As shown, the insertion mechanism includes a centering sleeve 3, a clamping spring 4, and several clamping steel balls 5. The centering sleeve 3 has a circular hole inside that mates with the center of the tap. The centering sleeve 3 is slidably inserted into the lower side of the spindle sleeve 2. A limiting piece 6 is integrally formed in the middle of the inner wall of the spindle sleeve 2. The limiting piece 6 has a square hole that mates with the top of the tap. The clamping spring 4 is installed between the limiting piece 6 and the centering sleeve 3. Several positioning holes are opened in the middle of the side wall of the centering sleeve 3, and the clamping steel balls 5 are slidably installed in the positioning holes. The spindle sleeve 2... The inner wall of the device has an upwardly extending variable diameter section 7. The clamping steel ball 5 slides and abuts against the inner wall of the variable diameter section 7. When installing the tap, the centering sleeve 3 is pressed upward, causing the clamping steel ball 5 to move upward within the variable diameter section 7 and roll outward, allowing the tap to be inserted smoothly. After insertion, under the elastic force of the clamping spring 4, the centering sleeve 3 returns to its original position downward. The side wall of the variable diameter section 7 pushes the clamping steel ball 5 to press and clamp it against the outer wall of the tap, thus achieving the clamping and fixing of the tap. The torque of the main shaft sleeve 2 on the tap can be transmitted through the square hole on the limiting piece 6.

[0024] like Figure 2-3 As shown, the upper side of the outer shell 1 is provided with a protrusion 8 for transmitting torque, the lower side of the outer shell 1 is provided with an internal thread, the outer wall of the outer shell 1 is provided with a T-shaped annular groove, the inner wall of the T-shaped annular groove is provided with a vertical sliding groove 9 communicating with the outer shell 1, the vertical sliding groove 9 extends downward to the lower end of the outer shell 1 to facilitate the installation of the fine-tuning component, the top of the outer shell 1 is provided with a connecting block 10, the protrusion 8 is provided on the upper side of the connecting block 10, and the lower side of the connecting block 10 is provided with several horizontal sliding grooves.

[0025] The adjusting mechanism includes an adjusting nut 11, an adjusting abutment ring 12, a butterfly spring 13, a compression ring 14, an adjusting steel ball 15, and a fine-tuning assembly. The adjusting nut 11 is threadedly connected to the lower side of the outer casing 1. The outer wall of the adjusting abutment ring 12 is provided with several guide sliders 16 that convex and concave with the vertical sliding groove 9. The adjusting abutment ring 12 abuts against the upper side of the adjusting nut 11. The fine-tuning assembly includes a knob ring 17, a nut ring 18, and a fine-tuning screw ring 19. The knob ring 17 is rotatably mounted in a T-shaped ring groove. The inner wall of the knob ring 17 is provided with several lifting grooves, and the outer wall of the nut ring 18 is provided with a guide slider 16 that slides within the lifting grooves. The knob ring 17 and the nut ring 18 can rotate circumferentially within the T-shaped groove, and the nut ring 18 can slide up and down within the lifting groove. The lower side of the nut ring 18 is provided with a support ring groove 20, and the upper side of the inner wall of the nut ring 18 is provided with an internal thread. The guide slider 16 of the adjusting ring 12 is slidably installed within the support ring groove 20, and the outer wall of the fine-tuning screw ring 19 is provided with... A plurality of threaded blocks 26 are slidably installed in a lifting groove. These threaded blocks 26 are threadedly connected to the upper side of a nut ring 18. An adjusting steel ball 15 is horizontally slidably installed in a horizontal groove. A compression ring 14 abuts against the lower side of the adjusting steel ball 15. A disc spring 13 abuts between a fine-tuning screw ring 19 and a compression ring 14. A plurality of wedge-shaped blocks 21 are integrally formed on the upper side of the compression ring 14, slidably inserted into the horizontal groove. The inner wall of each wedge-shaped block 21 is provided with a compression ramp, which slidably abuts against... The adjusting steel ball 15 is in contact with the outside of the main shaft sleeve 2. A torque ring 22 is provided on the outer wall of the main shaft sleeve 2. A plurality of torque grooves are provided on the outer wall of the torque ring 22. The adjusting steel ball 15 is in contact with the torque groove. Rotating the adjusting nut 11 can push the adjusting abutment ring 12, nut ring 18 and fine-tuning screw ring 19 to slide up and down in the vertical slide groove 9 as a whole, so as to push and squeeze the butterfly spring 13 to adjust the pressure of the butterfly spring 13. The adjusting steel ball 15 is tightly squeezed into the torque groove by the squeezing slope of the wedge block 21.

[0026] like Figure 2 As shown, the outer wall of the adjusting nut 11 is provided with several positioning grooves 23, and the outer wall of the outer shell 1 is provided with a positioning ring groove. The inner wall of the positioning ring groove is provided with a positioning hole that communicates with the inside of the outer shell 1. A positioning snap ring 24 is detachably sleeved on the outer side of the positioning ring groove. One end of the positioning snap ring 24 is provided with an inwardly bent positioning part 25. The positioning part 25 passes through the positioning hole and is engaged in the positioning groove 23. The positioning snap ring 24 can be inserted into the positioning groove 23 to limit the adjustment nut 11. The adjusting nut 11 can be rotated and adjusted by removing the positioning snap ring 24. By engaging the positioning snap ring 24 in the positioning groove 23 at different positions, the elastic force of the disc spring 13 at different positions can be adjusted, thereby controlling the coarse adjustment of the torque.

[0027] Working principle:

[0028] In this invention, when installing the tap, the centering sleeve 3 is pressed upwards, causing the clamping steel ball 5 on the positioning sleeve to slide upwards along the diameter-changing part 7, giving the clamping steel ball 5 a displacement space to roll outwards. During tap insertion, the clamping steel ball 5 can be pushed outwards, allowing the tap to be smoothly inserted into the square hole of the upper limiting piece 6. This allows the spindle sleeve 2 to transmit torque to the tap through the square hole. After insertion, under the elastic force of the clamping spring 4, the centering sleeve 3 is pushed back to its original position. As the centering sleeve 3 slides down, the side wall of the diameter-changing part 7 pushes the clamping steel ball 5 to roll inwards and clamp it on the outer wall of the tap, completing the tap clamping. When it is necessary to remove the tap, the centering sleeve 3 is pressed again to remove the tap.

[0029] When torque adjustment is required, first remove the positioning snap ring 24 to allow the adjusting nut 11 to rotate. Rotating the adjusting nut 11 changes its height within the housing 1, pushing the adjusting abutment ring 12 to slide up and down. The adjusting abutment ring 12 pushes the nut ring 18 and its threaded fine-tuning screw ring 19 to slide upwards, thereby adjusting the spring force of the disc spring 13. By adjusting the spring force, the pressure of the adjusting steel ball 15 on the torque groove can be changed, achieving torque control and adjustment. Then, install and lock the adjusting nut 11, depending on the positioning position. The groove 23 allows for coarse adjustment of torque at different levels. After coarse torque adjustment, rotating the knob ring 17 pushes the fine-tuning screw ring 19 upward relative to the nut ring 18 via the threaded connection, further compressing the disc spring 13 to achieve fine torque adjustment. When used in conjunction with the adjusting nut 11, stepless torque adjustment can be achieved, making it more suitable for the hardness differences of the tap material. When the resistance of the tap exceeds the set value, the spindle sleeve 2 separates from the outer shell 1, preventing the tap from continuing to rotate, avoiding excessive resistance that could cause the tap to break, and improving the service life of the tap.

[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 tap chuck fixture for holding taps, characterized in that: The device includes a housing, a spindle sleeve housed within the housing, an insertion mechanism for inserting taps, and an adjustment mechanism for adjusting torque. The adjustment mechanism includes an adjusting ring, a disc spring, a compression ring, an adjusting ball, and a fine-tuning assembly. The adjusting ring is slidably mounted within the housing, and the adjusting ball is horizontally slidably mounted on the inner side of the housing. The adjusting ball abuts against the outer wall of the spindle sleeve, the compression ring abuts against the lower side of the adjusting ball, and the disc spring abuts between the adjusting ring and the fine-tuning assembly. A T-shaped opening is provided on the outer wall of the housing. The T-shaped annular groove has a vertical sliding groove on its inner wall that communicates with the outer shell. The outer wall of the adjusting ring is provided with several guide sliders at intervals. The guide sliders slide through the vertical sliding groove. The fine-tuning assembly includes a knob ring, a nut ring, and a fine-tuning screw ring. The knob ring is rotatably installed in the T-shaped annular groove. The lower side of the nut ring is provided with a support ring groove. The guide sliders are rotatably inserted into the support ring groove. The outer wall of the fine-tuning screw ring is provided with several threaded blocks. Several threaded blocks are threadedly connected to the upper side of the nut ring.

2. The tap chuck fixture according to claim 1, characterized in that: The adjustment mechanism also includes an adjustment nut, which is threaded to the lower end of the housing and abuts against the lower side of the adjustment ring. The inner wall of the knob ring is provided with several lifting grooves, and the outer wall of the nut ring is provided with a guide slider that slides within the lifting grooves.

3. The tap chuck fixture according to claim 2, characterized in that: The upper side of the inner wall of the outer shell is provided with several horizontal sliding grooves. The adjusting steel ball is slidably installed in the horizontal sliding groove. Several wedge-shaped blocks are integrally formed on the upper side of the extrusion ring and are slidably inserted into the horizontal sliding groove. The inner wall of the wedge-shaped block is provided with an extrusion inclined surface. The extrusion inclined surface slides and abuts against the outer side of the adjusting steel ball. A torque ring is provided on the outer wall of the main shaft sleeve. Several torque grooves are provided on the outer wall of the torque ring. The adjusting steel ball abuts against the torque groove.

4. The tap chuck fixture according to claim 3, characterized in that: The adjusting nut has several positioning grooves on its outer wall, and the outer wall of the housing has a positioning ring groove. The inner wall of the positioning ring groove has a positioning hole that connects to the inside of the housing. A positioning snap ring is detachably sleeved on the outside of the positioning ring groove. One end of the positioning snap ring has an inwardly bent positioning part, which passes through the positioning hole and engages with the positioning groove.

5. A tap chuck fixture according to claim 4, characterized in that: The insertion mechanism includes a centering sleeve, a clamping spring, and several clamping steel balls. The centering sleeve is slidably inserted into the lower side of the spindle sleeve. A limiting piece is integrally formed in the middle of the inner wall of the spindle sleeve. The clamping spring is installed between the limiting piece and the centering sleeve. Several positioning holes are opened in the middle of the side wall of the centering sleeve, and the clamping steel balls are slidably installed in the positioning holes. An upwardly expanding variable diameter section is provided in the middle of the inner wall of the spindle sleeve, and the clamping steel balls slide against the inner wall of the variable diameter section.