A tool holder connection device for metal cutting tools

Abstract

This utility model relates to a tool holder connecting device for metal cutting tools, including a locking seat, a nut, a collet, a tool holder connecting seat, and a tool holder. A nut is installed at the front end of the locking seat, and a collet is located in the middle of the nut's interior. The tool holder is located at the rear end of the locking seat. A repulsive magnetic field is generated between an electromagnetic plate and a magnetic sheet on the clamping plate, causing the clamping plate to move laterally along a guide rod, clamping and fixing the outer surface of the tool holder. Simultaneously, a pin is inserted into a positioning hole. The repulsive magnetic field further drives the clamping plate to clamp and fix the outer surface of the tool holder, effectively reducing wear during operation and ensuring stable clamping and fixing of the tool holder. A top ball drives a pressing rod to press upwards, which in turn presses upwards at the lower end of the four connecting plates. The inner support plates on both sides are pushed outwards, abutting against the left and right sides of the inner wall of the tool holder, improving the fixation of the tool holder's interior and reducing vibration.

Description

Technical Field

[0001] This utility model relates to the field of machine tool technology, specifically to a tool holder connection device for metal cutting tools. Background Technology

[0002] A tool holder is a tool that connects a machine spindle to cutting tools and other accessories. The main standards include spindle models such as BT, SK, CAPTO, BBT, and HSK. The tool holder needs to be fixed to the machine tool through a connecting device.

[0003] A hydraulic tool holder connection device, with publication number CN201335334Y, includes a machine spindle with an integrally mounted hydraulic tool holder, a hydraulic tool holder connecting pipe, and a cooling pipe. The device is characterized by a connecting block between the hydraulic tool holder and the cooling pipe, a channel within the connecting block, a tool holder connection port at the lower end of the channel, the hydraulic tool holder connecting pipe connecting the tool holder connection port and the hydraulic tool holder, and an outlet at the other end of the channel connecting to the cooling pipe. This invention provides a convenient and quick connection between hydraulic tool holders of various specifications and cooling pipes, and is compact and low-cost, suitable for vertical and horizontal milling machines, CNC milling machines, and machining centers.

[0004] The above-disclosed technical solution also has the following shortcomings: when the tool holder is installed inside the connecting device, the moving parts need to be driven by a hydraulic piston to clamp and fix the tool holder. Long-term movement friction causes the hydraulic piston to wear, reducing the stability of clamping and fixing. In addition, only the outer surface of the tool holder is clamped and fixed, and the inside of the tool holder is hollow, which is prone to vibration, reducing the stability of the tool connected to the tool holder for metal cutting. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To solve the above-mentioned technical problems, this utility model provides a tool holder connection device for metal cutting tools.

[0007] (II) Technical Solution

[0008] Based on this, the present invention provides the following technical solution: a tool holder connecting device for metal cutting tools, including a nut installed at the front end of a locking seat, and a collet provided in the middle of the nut, and a tool holder provided at the rear end of the locking seat, and the tool holder is installed inside the tool holder connecting seat;

[0009] The tool holder connecting seat includes a base body and an external clamping mechanism. The external clamping mechanism is located inside the base body, and the tool holder is installed inside the base body.

[0010] The external clamping mechanism includes a fixed base, an electromagnetic plate, a clamping plate, and a pin. The fixed base is disposed on the inner wall of the base, and an electromagnetic plate is embedded on the surface of the fixed base. The electromagnetic plate is located on the outer side of the clamping plate, and a pin is disposed on the inner wall of the clamping plate. The clamping plate clamps the outer surface of the tool holder.

[0011] Preferably, the external clamping mechanism further includes a fixed frame, a guide slider, a guide rod, and a spring. The fixed frame is disposed on the inner wall of the base, and the guide slider is slidably installed inside the fixed frame. The guide slider is fixed to the edge of the clamping plate. The fixed frame is also provided with a guide rod, which passes through the guide slider with a clearance fit. A spring is wound around the outer side of the end of the guide rod, and the right end of the spring abuts against the left end face of the guide slider.

[0012] Preferably, an internal support mechanism is also provided in the middle of the seat body. The internal support mechanism includes a central column, a pressing mechanism, a connecting plate, and an internal support plate. The pressing mechanism is installed at the lower end of the central column, and the upper end of the pressing mechanism is axially connected to one end of the connecting plate. The other end of the connecting plate is axially connected to the middle of the inner side of the internal support plate, and the internal support plate is abutted against the inner wall of the tool holder.

[0013] Preferably, the extrusion mechanism includes a top ball, an extrusion rod, and a connecting shaft. The extrusion rod is welded to the upper end of the top ball, and the upper end of the extrusion rod is slidably installed inside the lower end of the central column. The upper end of the extrusion rod is axially connected to one end of the connecting plate through the connecting shaft.

[0014] Preferably, the central column has a guide groove embedded in its middle, and a top spring is installed inside the guide groove.

[0015] Preferably, the inner wall of the tool holder is also provided with a positioning hole, and a pin is inserted and installed inside the positioning hole.

[0016] Preferably, a positioning frame is provided in the middle of the inner side of the tool holder, and an inner contact plate is installed on the inner wall of the positioning frame. The top ball is inserted and installed inside the positioning frame, and the inner contact plate abuts against the surface of the top ball.

[0017] Preferably, a positioning block is provided at the rear end of the locking knife seat, and the positioning block is inserted into the positioning groove provided at the front end of the seat body.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a tool holder connecting device for metal cutting tools, which has the following advantages:

[0020] 1. The tool holder connecting device for metal cutting tools generates a repulsive magnetic field between the electromagnetic plate and the magnetic sheet on the clamping plate, causing the clamping plate to move laterally along the guide rod to clamp and fix the outer surface of the tool holder. At the same time, the pin is inserted into the positioning hole to improve the accuracy and firmness of the clamping plate clamping the outer surface of the tool holder. By generating a repulsive magnetic field to drive the clamping plate to clamp and fix the outer surface of the tool holder, the wear generated by the clamping plate during operation can be effectively reduced, ensuring that the clamping plate can stably clamp and fix the tool holder.

[0021] 2. The tool holder connecting device for a metal cutting tool uses a top ball to drive the pressing rod to press upward. Under the connection of the connecting shaft, the pressing rod presses upward against the lower end of the four connecting plates. At this time, the inner support plates on both sides of the middle of the four connecting plates are pushed outward and abut against the left and right sides of the inner wall of the tool holder, thereby improving the fixation of the tool holder and reducing the vibration of the tool holder. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the internal structure of the tool holder connector of this utility model;

[0024] Figure 3 This is a schematic diagram of the internal structure of the external clamping mechanism of this utility model;

[0025] Figure 4 This is a schematic diagram of the internal structure of the knife handle of this utility model;

[0026] Figure 5 This is a schematic diagram of the internal support mechanism of this utility model;

[0027] Figure 6 This is a schematic diagram of the extrusion mechanism of this utility model.

[0028] In the diagram: Locking base-1, Positioning block-11, Nut-2, Collet-3, Tool holder connecting seat-4, Base-41, External clamping mechanism-42, Fixed seat-421, Electromagnetic plate-422, Clamping plate-423, Pin-424, Fixed frame-425, Guide slider-426, Guide rod-427, Spring-428, Internal support mechanism-43, Central column-431, Extrusion mechanism-432, Top ball-4321, Extrusion rod-4322, Connecting shaft-4323, Linking plate-433, Internal support plate-434, Guide groove-435, Top spring-436, Positioning groove-44, Tool holder-5, Positioning hole-51, Positioning frame-52, Inner contact plate-521. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-3 A tool holder connecting device for metal cutting tools includes a nut 2 installed at the front end of a tool locking seat 1, and a collet 3 provided in the middle of the nut 2, and a tool holder 5 provided at the rear end of the tool locking seat 1, and the tool holder 5 is installed inside a tool holder connecting seat 4.

[0031] The tool holder connecting seat 4 includes a seat body 41 and an external clamping mechanism 42. The external clamping mechanism 42 is disposed inside the seat body 41, and the tool holder 5 is installed inside the seat body 41.

[0032] The external clamping mechanism 42 includes a fixed base 421, an electromagnetic plate 422, a clamping plate 423, and a pin 424. The fixed base 421 is disposed on the inner wall of the base body 41, and the electromagnetic plate 422 is embedded on the surface of the fixed base 421. The electromagnetic plate 422 is located on the outside of the clamping plate 423, and the pin 424 is disposed on the inner wall of the clamping plate 423. The clamping plate 423 clamps the outer surface of the tool holder 5.

[0033] It should be noted that there are two of each of the fixed base 421, electromagnetic plate 422, and clamping plate 423, located on the left and right sides inside the base body 41, respectively. The electromagnetic plate 422 is connected to an external power source, and a magnetic sheet with the same magnetic pole as the electromagnetic plate 422 is provided on the outer surface of the clamping plate 423. When the electromagnetic plate 422 is energized, a repulsive magnetic field is generated between it and the magnetic sheet on the outer surface of the clamping plate 423, which pushes the clamping plate 423 toward the outer surface of the tool holder 5. By maintaining the repulsive magnetic field, the two clamping plates 423 are stably clamped on both sides of the outer surface of the tool holder 5.

[0034] The external clamping mechanism 42 also includes a fixed frame 425, a guide slider 426, a guide rod 427, and a spring 428. The fixed frame 425 is disposed on the inner wall of the base 41, and the guide slider 426 is slidably installed inside the fixed frame 425. The guide slider 426 is fixed to the edge of the clamping plate 423. The guide rod 427 is also disposed inside the fixed frame 425, and the guide rod 427 passes through the guide slider 426 with clearance fit. The spring 428 is wound around the outer side of the end of the guide rod 427, and the right end of the spring 428 abuts against the left end face of the guide slider 426.

[0035] It should be noted that there are four of each of the following: fixed frame 425, guide slider 426, guide rod 427 and spring 428. They are arranged in pairs and are respectively set on the left and right sides inside the base 41. The two guide sliders 426 in the same group connect the upper and lower ends of the clamping plate 423, so that the clamping plate 423 can slide laterally along the guide rod 427, and the clamping plate 423 can automatically and elastically return to its original position through the spring 428.

[0036] A positioning block 11 is provided at the rear end of the locking knife holder 1, and the positioning block 11 is inserted into the positioning groove 44 provided at the front end of the base body 41;

[0037] The inner wall of the handle 5 is also provided with a positioning hole 51, and the pin 424 is inserted and installed inside the positioning hole 51.

[0038] It should be noted that there are two positioning slots 44, and the orientation of the two positioning slots 44 corresponds to the orientation of the two clamping plates 423. After the two positioning blocks 11 on the locking base 1 are positioned and inserted into the two positioning slots 44, the positioning holes 51 on both sides of the inner wall of the tool handle 5 correspond exactly to the orientation of the pin 424. The pin 424 is inserted into the positioning hole 51, which improves the accuracy of the clamping plate 423 clamping the outer surface of the tool handle 5.

[0039] Please see Figure 4-6 A tool holder connection device for a metal cutting tool, wherein an inner support mechanism 43 is provided in the middle of the base 41. The inner support mechanism 43 includes a central column 431, a pressing mechanism 432, a connecting plate 433, and an inner support plate 434. The pressing mechanism 432 is installed at the lower end of the central column 431, and the upper end of the pressing mechanism 432 is axially connected to one end of the connecting plate 433. The other end of the connecting plate 433 is axially connected to the middle of the inner side of the inner support plate 434, and the inner support plate 434 is abutted against the inner wall of the tool holder 5.

[0040] It should be noted that there are four connecting plates 433, and the ends of the four connecting plates 433 are connected by shafts to form a rhomboid structure. Two symmetrical inner support plates 434 are connected by shafts on both sides of the middle of the four connecting plates 433. Through the linkage of the connecting plates 433, the inner support plates 434 on both sides are pushed outward and abut against the left and right sides of the inner wall of the tool holder 5, thereby improving the fixation of the tool holder 5 and reducing the vibration of the tool holder 5.

[0041] The extrusion mechanism 432 includes a top ball 4321, an extrusion rod 4322 and a connecting shaft 4323. The extrusion rod 4322 is welded to the upper end of the top ball 4321, and the upper end of the extrusion rod 4322 is slidably installed inside the lower end of the central column 431. The upper end of the extrusion rod 4322 is axially connected to one end of the connecting plate 433 through the connecting shaft 4323.

[0042] A positioning frame 52 is provided in the middle of the inner side of the handle 5, and an inner contact plate 521 is installed on the inner wall of the positioning frame 52. The top ball 4321 is inserted and installed inside the positioning frame 52, and the inner contact plate 521 abuts against the surface of the top ball 4321.

[0043] It should be noted that the positioning frame 52 has a ball groove inside. When the top ball 4321 is squeezed into the positioning frame 52, it drives the squeezing rod 4322 to squeeze upward, thereby moving the upper and lower connecting ends of the four connecting plates 433 towards the middle, and driving the inner support plates 434 on both sides to push outward.

[0044] The inner contact plate 521 is made of rubber, which has good elasticity and improves the firmness of the top ball 4321 when it is inserted into the positioning frame 52. This prevents the ball from coming loose and causing insufficient pressure of the compression rod 4322, which in turn causes insufficient pressure of the inner support plate 434 against the inner wall of the handle 5.

[0045] The center column 431 has a guide groove 435 embedded in its middle, and a top spring 436 is installed inside the guide groove 435.

[0046] It should be noted that the connecting shafts at the upper and lower ends of the four connecting plates 433 are guided and slid inside the guide groove 435, and the top spring 436 applies elastic force to the two connecting shafts. When the tool holder 5 is moved out of the seat 41, the top ball 4321 moves out of the positioning frame 52, and the top spring 436 resets the four connecting plates 433, causing the inner support plate 434 to retract inward, so that it can be moved out of the tool holder 5.

[0047] In summary, during use, the rear end of the tool handle 5 is inserted into the base 41, and the two positioning blocks 11 at the rear end of the locking base 1 are positioned and inserted into the positioning groove 44. Then, the electromagnetic plate 422 on the fixed base 421 is energized. At this time, the electromagnetic plate 422 and the magnetic sheet on the clamping plate 423 generate a repulsive magnetic field, causing the clamping plate 423 to move laterally along the guide rod 427 to clamp and fix the outer surface of the tool handle 5. At the same time, the pin 424 is inserted into the positioning hole 51 to improve the accuracy and firmness of the clamping plate 423 in clamping the outer surface of the tool handle 5. By generating a repulsive magnetic field to drive the clamping plate 423 to clamp and fix the outer surface of the tool handle 5, the wear generated by the clamping plate 423 during operation can be effectively reduced, ensuring that the clamping plate 423 can stably clamp and fix the tool handle 5.

[0048] Simultaneously, when the tool holder 5 is inserted into the base 41, the central column 431 enters the center position inside the tool holder 5, and the top ball 4321 is squeezed into the positioning frame 52. The top ball 4321 drives the squeezing rod 4322 to squeeze upward. Under the connection of the connecting shaft 4323, the squeezing rod 4322 squeezes upward on the lower end of the four connecting plates 433. At this time, the inner support plates 434 on both sides of the middle of the four connecting plates 433 are pushed outward and abut against the left and right sides of the inner wall of the tool holder 5, improving the fixation of the tool holder 5 and thus reducing the vibration of the tool holder 5.

[0049] 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 limited by the appended claims and their equivalents.

Claims

1. A tool holder connecting device for a metal cutting tool, comprising a tool locking seat (1), a nut (2), a collet (3), a tool holder connecting seat (4), and a tool holder (5), wherein the nut (2) is installed at the front end of the tool locking seat (1), and a collet (3) is provided in the middle of the nut (2), and a tool holder (5) is provided at the rear end of the tool locking seat (1), and the tool holder (5) is installed inside the tool holder connecting seat (4); characterized in that The tool holder connecting seat (4) includes a seat body (41) and an external clamping mechanism (42). The external clamping mechanism (42) is disposed inside the seat body (41), and the tool holder (5) is installed inside the seat body (41). The external clamping mechanism (42) includes a fixed seat (421), an electromagnetic plate (422), a clamping plate (423), and a pin (424). The fixed seat (421) is disposed on the inner wall of the seat body (41), and the electromagnetic plate (422) is embedded on the surface of the fixed seat (421). The electromagnetic plate (422) is located outside the clamping plate (423), and the pin (424) is disposed on the inner wall of the clamping plate (423). The clamping plate (423) clamps the outer surface of the tool holder (5).

2. A tool holder connection for a metal cutting tool according to claim 1, characterized in that: The external clamping mechanism (42) further includes a fixed frame (425), a guide slider (426), a guide rod (427), and a spring (428). The fixed frame (425) is set on the inner wall of the base (41), and the guide slider (426) is slidably installed inside the fixed frame (425). The guide slider (426) is fixed to the edge of the clamping plate (423). The guide rod (427) is also provided inside the fixed frame (425), and the guide rod (427) passes through the guide slider (426) with a clearance fit. The spring (428) is wound around the outer side of the end of the guide rod (427), and the right end of the spring (428) abuts against the left end face of the guide slider (426).

3. A tool holder connection for a metal cutting tool according to claim 2, characterized in that: The seat (41) is also provided with an inner support mechanism (43) in the middle. The inner support mechanism (43) includes a central column (431), a pressing mechanism (432), a connecting plate (433), and an inner support plate (434). The pressing mechanism (432) is installed at the lower end of the central column (431), and the upper end of the pressing mechanism (432) is axially connected to one end of the connecting plate (433). The other end of the connecting plate (433) is axially connected to the middle end of the inner side of the inner support plate (434), and the inner support plate (434) is abutted against the inner wall of the handle (5).

4. A tool holder connection for a metal cutting tool according to claim 3, characterized in that: The extrusion mechanism (432) includes a top ball (4321), an extrusion rod (4322), and a connecting shaft (4323). The extrusion rod (4322) is welded to the upper end of the top ball (4321), and the upper end of the extrusion rod (4322) is slidably installed inside the lower end of the central column (431). The upper end of the extrusion rod (4322) is axially connected to one end of the connecting plate (433) through the connecting shaft (4323).

5. A tool holder connection for a metal cutting tool according to claim 4, characterized in that: The central column (431) is also fitted with a guide groove (435) at its middle end, and a top spring (436) is installed inside the guide groove (435).

6. A tool holder connection for a metal cutting tool according to claim 3, characterized in that: The inner wall of the handle (5) is also provided with a positioning hole (51), and the pin (424) is inserted and installed inside the positioning hole (51).

7. A tool holder connection for a metal cutting tool according to claim 1, characterized in that: A positioning frame (52) is provided in the middle of the inner side of the handle (5), and an inner contact plate (521) is installed on the inner wall of the positioning frame (52). The top ball (4321) is inserted and installed inside the positioning frame (52), and the inner contact plate (521) abuts against the surface of the top ball (4321).

8. A tool holder connection for a metal cutting tool according to claim 1, characterized in that: The locking knife seat (1) is provided with a positioning block (11) at the rear end, and the positioning block (11) is inserted into the positioning groove (44) provided at the front end of the seat body (41).

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