Taper-shank cutter handle locking device

Abstract

The utility model discloses a taper shank knife handle locking device, which relates to the technical field of knife handle locking and comprises a fixed base, a reversing sleeve is sleeved on the top of the fixed base, a rotating shaft is sleeved on one side of the fixed base, and a knife locking sleeve is fixed at the outer end of the rotating shaft by matching with a hexagonal head bolt and an internal tooth locking washer. A locking pin is locked at the bottom end of the reversing sleeve, a jacking spring is arranged at the bottom of the reversing sleeve, a limiting pin is fixed to the bottom of an inner cavity of the fixed base in cooperation with a first hexagon socket set screw, the outer side of the tool locking sleeve is sleeved with a limiting handle, and a limiting handle spring is embedded into the inner side of the limiting handle. An elastic cylindrical pin is fixed in the tool locking sleeve, positioning errors caused by repeated clamping are effectively avoided through accurate equal-division positioning, it is guaranteed that the high precision of a tool is kept during machining, the requirements of industries such as aerospace and mold manufacturing with the extremely high precision requirement can be met, and the machining quality and the yield of products are improved.

Description

Technical Field

[0001] This utility model relates to the field of tool holder locking technology, specifically a tapered tool holder locking device. Background Technology

[0002] As the manufacturing industry continues to demand higher precision and efficiency in machining, HSK tapered cutting tools, with their unique double-sided positioning structure, can achieve a high-rigidity connection and high-precision transmission between the spindle and the cutting tool, and are increasingly widely used in precision machining industries such as aerospace, automobile manufacturing, and mold processing.

[0003] However, existing HSK tapered tool holder clamping devices struggle to achieve precise 360° equidistant positioning of the rotation axis during tool changing. This necessitates frequent tool holder clamping and adjustment during multi-process machining, reducing machining efficiency and increasing positioning errors due to repeated clamping, thus affecting machining accuracy. Furthermore, most clamping devices suffer from unreasonable structural designs, making tool holder loading and unloading cumbersome and requiring significant effort from operators. This process easily causes wear and damage to the tapered surfaces between the HSK tapered tool holder and the locking seat, reducing their lifespan and increasing equipment maintenance costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a tapered shank tool holder locking device.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tapered shank knife handle locking device, comprising a fixed base, a reversing sleeve fitted on the top of the fixed base, a rotating shaft fitted on one side of the fixed base, a locking sleeve fixed to the outer end of the rotating shaft with a hexagonal head bolt and an internal tooth locking washer, a locking pin locked to the bottom end of the reversing sleeve, a top-tightening spring provided at the bottom of the reversing sleeve, a limit pin fixed to the bottom of the inner cavity of the fixed base with a first internal hexagonal set screw, a limit handle fitted on the outer side of the locking sleeve, a limit handle spring embedded in the inner side of the limit handle, an elastic cylindrical pin fixed inside the locking sleeve, an O-ring embedded on the outer surface of the limit handle, three sets of second internal hexagonal set screws fixed to the bottom end of the locking sleeve, three sets of ejector pin springs and ejector pin bodies fitted inside the locking sleeve, a sliding groove provided on the outer side of the limit handle, and eight sets of slots equally divided on the outer circumference of the rotating shaft.

[0006] As described above, the limiting pin is embedded on the outside of the rotating shaft and restricts the axial movement of the rotating shaft.

[0007] As described above, the top spring is elastically supported between the reversing sleeve and the fixed base, and the locking pin is movably engaged with the slot.

[0008] As described above, the elastic cylindrical pin passes through the slide groove, and the slide groove is slidably connected to the elastic cylindrical pin.

[0009] As described above, the limiting handle is elastically supported by a spring between the limiting handle and the elastic cylindrical pin.

[0010] As described above, the top of the limiting handle passes through the locking sleeve and locks the HSK tapered tool holder.

[0011] As described above, the ejector pin is elastically supported by a spring between the second internal hexagon set screw and the ejector pin body, and the ejector pin body abuts against the HSK tapered tool holder.

[0012] Compared with the prior art, this tapered shank tool holder locking device has the following advantages:

[0013] I. This utility model achieves 360° eight-part positioning of the rotating axis through a unique structural design. During multi-process machining, frequent disassembly and re-clamping of the tool holder is unnecessary; simply rotating the rotating axis to the corresponding angle allows for rapid tool position switching, significantly reducing auxiliary machining time and greatly improving machining efficiency. Simultaneously, precise eight-part positioning effectively avoids positioning errors caused by repeated clamping, ensuring the tool maintains high precision during machining. This meets the high precision requirements of industries such as aerospace and mold manufacturing, improving product processing quality and yield.

[0014] Second, the limiting handle and ejector pin in this utility model work together to greatly improve the loading and unloading experience of HSK taper tool holders. The limiting handle can reliably lock the tool holder and ensure machining stability. When the tool holder needs to be disassembled, the ejector pin body automatically and smoothly ejects the tool holder under the action of the ejector pin spring, avoiding wear and damage to the tapered surface caused by improper force by the operator. This design effectively protects the key parts of the HSK taper tool holder and the locking seat, extends the service life of both, reduces the frequency of equipment maintenance and parts replacement, thereby reducing the overall equipment maintenance cost and improving the production efficiency of the enterprise.

[0015] Other advantages, objectives and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination or study, or may be taught from the practice of this invention. Attached Figure Description

[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 top structure of the locking sleeve of this utility model;

[0018] Figure 3This is a cross-sectional view of the structure at BB of this utility model;

[0019] Figure 4 This is a cross-sectional view of the side of the locking sleeve of this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the limiting handle of this utility model;

[0021] Figure 6 This is a cross-sectional view of the limiting handle of this utility model.

[0022] In the diagram: 1. Fixed base; 2. Reversing sleeve; 3. Rotating shaft; 4. Limit handle spring; 5. Elastic cylindrical pin; 6. O-ring; 7. Limit handle; 8. Locking sleeve; 9. Hex head bolt; 10. Internal tooth locking washer; 11. Locking pin; 12. Top spring; 13. First internal hex set screw; 14. Limit pin; 15. Second internal hex set screw; 16. Ejector pin spring; 17. Ejector pin body; 18. Slide groove; 19. Slot. Detailed Implementation

[0023] 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.

[0024] like Figure 1-6 As shown, this utility model provides a tapered shank knife holder locking device, including a fixed base 1, a reversing sleeve 2 sleeved on the top of the fixed base 1, a rotating shaft 3 sleeved on one side of the fixed base 1, a locking sleeve 8 fixed to the outer end of the rotating shaft 3 with a hexagonal head bolt 9 and an internal tooth locking washer 10, a locking pin 11 locked to the bottom end of the reversing sleeve 2, a top spring 12 provided at the bottom of the reversing sleeve 2, a limit pin 14 fixed to the bottom of the inner cavity of the fixed base 1 with a first internal hexagonal head set screw 13, and a locking sleeve 8 sleeved on the outer side of the locking sleeve 8. The limiting handle 7 has a limiting handle spring 4 embedded inside it. The locking sleeve 8 has an elastic cylindrical pin 5 fixed inside it. The outer surface of the limiting handle 7 has an O-ring 6 embedded in it. The bottom end of the locking sleeve 8 has three sets of second internal hexagon set screws 15. The inner side of the locking sleeve 8 is fitted with three sets of ejector pin springs 16 and ejector pin bodies 17. The outer side of the limiting handle 7 has a sliding groove 18. The outer circumference of the rotating shaft 3 is divided into eight sets of slots 19. The limiting pin 14 is embedded in the outer side of the rotating shaft 3 and restricts the axial movement of the rotating shaft 3.

[0025] With the fixed base 1 serving as the basic support structure for the entire device, the limiting pin 14 is fixed to the bottom of the inner cavity of the fixed base 1 by the first internal hexagon set screw 13. It is embedded in the outer side of the rotating shaft 3 to form an axial limiting structure. This design effectively limits the axial movement of the rotating shaft 3 caused by external force during rotation, ensuring the stability of the rotating shaft 3 in the 360° direction eight-part positioning process, avoiding positioning deviation caused by axial movement, and providing a reliable guarantee for the accurate positioning of tools in multi-process machining.

[0026] like Figure 1 As shown, the top spring 12 is elastically supported between the reversing sleeve 2 and the fixed base 1, and the locking pin 11 is movably engaged with the slot 19.

[0027] With the design of the clamping spring 12, when it is necessary to adjust the positioning angle of the rotating shaft 3, the operator can manually push the reversing sleeve 2 to compress the clamping spring 12, so that the locking pin 11 disengages from the slot 19, and the rotating shaft 3 can rotate freely. When the rotating shaft 3 rotates to the required angle, the reversing sleeve 2 is released, the clamping spring 12 resets and pushes the reversing sleeve 2 down, so that the locking pin 11 re-engages into the corresponding slot 19, thereby achieving precise positioning of the rotating shaft 3 and meeting the diverse needs of different processes for tool position.

[0028] like Figure 1 As shown, the elastic cylindrical pin 5 passes through the slide groove 18, and the slide groove 18 is slidably connected to the elastic cylindrical pin 5.

[0029] The sliding connection structure formed by the groove 18 and the elastic cylindrical pin 5 allows the elastic cylindrical pin 5 to slide along the groove 18 during the rotation of the limit handle 7, providing guidance and constraint for the rotation of the limit handle 7.

[0030] like Figure 1 , 6 As shown, the limiting handle spring 4 is elastically supported between the limiting handle 7 and the elastic cylindrical pin 5. The top of the limiting handle 7 passes through the locking sleeve 8 and locks the HSK tapered tool holder.

[0031] By utilizing the elastic force of the limit handle spring 4, when the limit handle 7 is rotated to the locked position, the limit handle spring 4 provides elastic preload, ensuring that the limit handle 7 can firmly lock the HSK taper tool holder, preventing the tool holder from loosening during machining, and improving the safety and stability of the machining process.

[0032] like Figure 3 As shown, the ejector pin spring 16 is elastically supported between the second internal hexagon set screw 15 and the ejector pin body 17, and the ejector pin body 17 abuts against the HSK taper tool holder.

[0033] With the design of the ejector pin spring 16, when the limit handle 7 is in the unlocked state, the elastic force of the ejector pin spring 16 pushes the ejector pin body 17 upward, smoothly ejecting the HSK tapered tool holder from the locking sleeve 8. This design greatly reduces the force required by the operator to disassemble the tool holder, avoids wear and damage to the tapered surface between the HSK tapered tool holder and the locking seat caused by forced disassembly, effectively extends the service life of the tool holder and the locking seat, reduces equipment maintenance costs, and also improves the efficiency and convenience of tool holder loading and unloading.

[0034] Working principle:

[0035] When the angle of the rotating shaft 3 needs to be adjusted, the operator manually pushes the reversing sleeve 2. The reversing sleeve 2 compresses the top spring 12 and drives the locking pin 11 at the bottom to disengage from the groove 19 on the outer periphery of the rotating shaft 3. At this time, the rotating shaft 3 can rotate freely. After the rotating shaft 3 rotates to the target angle in the eight equal divisions of the 360° direction, the reversing sleeve 2 is released. The top spring 12 resets and pushes the reversing sleeve 2 down, so that the locking pin 11 re-engages into the corresponding groove 19, thereby achieving precise positioning of the rotating shaft 3 and meeting the diverse needs of different processes for tool position.

[0036] During the tool holder locking process, after the rotating shaft 3 is positioned, the HSK tapered tool holder is placed into the locking sleeve 8. The operator pulls the limit handle 7, and then the elastic preload provided by the limit handle spring 4 pushes the limit handle 7 to apply pressure to the HSK tapered tool holder, thereby firmly locking the tool holder.

[0037] In the tool holder loading and unloading process, when it is necessary to disassemble the HSK tapered tool holder, the operator first moves the limit handle 7 to the unlocked state. At this time, the ejector pin spring 16 pushes the ejector pin body 17 upward with its own elasticity. The ejector pin body 17 abuts against the HSK tapered tool holder, smoothly ejecting the tool holder from the locking sleeve 8. This design greatly reduces the force required for the operator to disassemble the tool holder, and avoids wear and damage to the tapered surface between the HSK tapered tool holder and the locking seat caused by forced disassembly. It not only improves the efficiency and convenience of tool holder loading and unloading, but also extends the service life of the tool holder and the locking seat, and reduces equipment maintenance costs.

[0038] 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 taper shank tool holder locking device comprising a stationary base (1), characterized in that: The top of the fixed base (1) is sleeved with a reversing sleeve (2), one side of the fixed base (1) is sleeved with a rotating shaft (3), the outer end of the rotating shaft (3) is fixed with a lock knife sleeve (8) matched with a hexagonal head bolt (9) and an inner tooth locking washer (10), the bottom end of the reversing sleeve (2) is locked with a locking pin (11), the bottom of the reversing sleeve (2) is provided with a jacking spring (12), the bottom of the inner cavity of the fixed base (1) is fixed with a limiting pin (14) matched with a first inner hexagonal set screw (13), the outer side of the lock knife sleeve (8) is sleeved with a limiting handle (7), the inner side of the limiting handle (7) is embedded with a limiting handle spring (4), the inside of the lock knife sleeve (8) is fixed with an elastic cylindrical pin (5), the outer surface of the limiting handle (7) is embedded with an O-shaped ring (6), the bottom end of the lock knife sleeve (8) is fixed with three groups of second inner hexagonal set screws (15), the inside of the lock knife sleeve (8) is sleeved with three groups of ejection pin springs (16) and ejection pin bodies (17), the outer side of the limiting handle (7) is provided with a sliding groove (18), the outer periphery of the rotating shaft (3) is equally divided into eight groups of clamping grooves (19).

2. The tool holder locking device of claim 1, wherein: The limiting pin (14) is embedded on the outer side of the rotating shaft (3) and limits the axial movement of the rotating shaft (3).

3. The tool holder locking device of claim 1, wherein: The jacking spring (12) is elastically supported between the reversing sleeve (2) and the fixed base (1), and the locking pin (11) is movably connected with the clamping groove (19).

4. The tool-shank locking device according to claim 1, characterized in that: The elastic cylindrical pin (5) passes through the sliding groove (18), and the sliding groove (18) is slidably connected with the elastic cylindrical pin (5).

5. The tool holder locking device of claim 1 wherein: The limiting handle spring (4) is elastically supported between the limiting handle (7) and the elastic cylindrical pin (5).

6. The tool holder locking device of claim 1 wherein: The top end of the limiting handle (7) passes through the lock knife sleeve (8) and locks the HSK taper tool holder.

7. The tool holder locking device of claim 1 wherein: The ejection pin spring (16) is elastically supported between the second inner hexagonal set screw (15) and the ejection pin body (17), and the ejection pin body (17) abuts against the HSK taper tool holder.

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