A stable tool holder

Abstract

The utility model relates to a tool holder technical field discloses a kind of stable tool holder, including two clamping claws, center positioning block and spring, two described clamping claws are left-right symmetrical and each other can open or close and install on tool disc, the center positioning block is fixed on the edge surface of tool disc and is located between two clamping claws, the spring is connected between the rear end of two clamping claws and is located in the rear side of center positioning block, the inside of two described clamping claws is provided with the clamping block for clamping handle, detachably mounted on the center positioning block is handle positioning block.The utility model can realize quick replacement different specifications handle positioning block (such as NBT30 / BT30 module) by the detachable design of handle positioning block, realize double handle standard compatibility, avoid the gap problem of traditional conversion sleeve, directly utilize the precision machining surface of positioning block and handle cooperation, improve clamping rigidity;And modular design reduces maintenance cost, handle positioning block can be replaced individually after wearing, without overall scrapping tool holder.

Description

Technical Field

[0001] This utility model relates to the field of knife clip technology, and in particular to a stable knife clip. Background Technology

[0002] In precision machining fields such as CNC machine tools and machining centers, tool holder systems are key components for achieving efficient and stable machining. Currently, the mainstream tool holder interface standards on the market include two types: NBT30 (Japanese standard) and BT30 (international standard). NBT30 tool holders are widely used in precision mold machining due to their high precision and high rigidity design, while BT30 tool holders have become the mainstream configuration for international equipment due to their strong versatility. However, the flange dimensions, taper mating surfaces, and pull stud locking structures of the two types of tool holders differ (for example, the NBT30 flange diameter is φ63mm, while the BT30 is φ57mm; NBT30 uses a 7:24 taper fit, while BT30 uses a 1:10 taper fit), making traditional tool holders incompatible for direct use. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the prior art by proposing a stable tool holder.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A sturdy tool holder includes two jaws, a central positioning block, and a spring. The two jaws are symmetrically mounted on a tool disc and can be opened or closed relative to each other. The central positioning block is fixed to the edge surface of the tool disc and located between the two jaws. The spring is connected between the rear ends of the two jaws and located behind the central positioning block. The inner sides of the two jaws are provided with clamping blocks for clamping the tool handle. A tool handle positioning block is detachably mounted on the central positioning block.

[0006] Preferably, both the tool holder positioning block and the center positioning block have two mounting holes, and the positions of the two mounting holes on the tool holder positioning block correspond to the positions of the two mounting holes on the center positioning block. Both the tool holder positioning block and the center positioning block are detachably connected to the tool disc by means of bolts passing through the mounting holes.

[0007] Preferably, each of the jaws is provided with a countersunk hole and a countersunk groove, and a fixing hole is provided at the cutter head position corresponding to the countersunk hole. A fixing screw is provided for each countersunk hole, and the fixing screw passes through the countersunk hole and is fixedly connected to the corresponding fixing hole.

[0008] Preferably, the countersunk hole is circular and a limit ring is installed on its inner circumference.

[0009] Preferably, the recess is located on the side of the chuck near the tool holder positioning block, and the recess is a rectangle with rounded corners, with a through hole in the middle.

[0010] Preferably, the side of the claw away from the sinker is hollowed out, and the top of the hollowed-out part corresponds to the top of the sinker, while the bottom of the hollowed-out part extends to the bottom of the claw.

[0011] Preferably, the inner side of the claw is arranged in an inner arc shape, and transitions to an outer inclined surface through an outer arc transition surface at the bottom position; the inner side of the block is arranged in an inner arc shape, and transitions to an outer inclined surface through an outer arc transition surface at the bottom position.

[0012] Preferably, a stabilizing hole is provided on the upper part of the inner side of the claw, a fixing pin is installed in the stabilizing hole, and the end of the spring is disposed in the stabilizing hole and sleeved on the outside of the fixing pin.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This utility model, through the detachable design of the tool holder positioning block, enables quick replacement of tool holder positioning blocks of different specifications (such as NBT30 / BT30 modules), achieving standard compatibility of dual tool holders, avoiding the gap problem of traditional conversion sleeves, and directly utilizing the precision-machined surface of the positioning block to cooperate with the tool holder, thereby improving clamping rigidity; moreover, the modular design reduces maintenance costs, and the tool holder positioning block can be replaced individually after wear, without the need to scrap the entire tool holder. Attached Figure Description

[0015] Figure 1 This is a front perspective view of a stable knife clip proposed in this utility model;

[0016] Figure 2 This is a three-dimensional view of the back of a sturdy knife clip proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the locking block of a stable knife clip proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the stabilizing hole of a stabilizing tool holder proposed in this utility model.

[0019] In the diagram: 1. Clamping claw; 2. Center positioning block; 3. Spring; 4. Clamping block; 5. Tool holder positioning block; 6. Mounting hole; 7. Countersunk hole; 8. Limiting ring; 9. Countersunk groove; 10. Through hole; 11. Stabilizing hole; 12. Positioning pin. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Reference Figures 1-4 A stable tool holder includes two jaws 1, a central positioning block 2, and a spring 3. The two jaws 1 are symmetrically mounted on the tool disc and can be opened or closed relative to each other. The central positioning block 2 is fixed to the edge surface of the tool disc and located between the two jaws 1. The spring 3 is connected between the rear ends of the two jaws 1 and located on the rear side of the central positioning block 2. The inner sides of the two jaws 1 are provided with clamping blocks 4 for clamping the tool handle. A tool handle positioning block 5 is detachably mounted on the central positioning block 2. The tool disc is a known technology and will not be described in detail here. In addition, in this application, the component is connected to the tool disc by bolts. The tool disc can be connected to the bolts through screw holes, or a nut can be provided on the side away from the component to lock it with the bolts, thereby fixing the tool disc to the component.

[0022] The detachable design of the tool holder positioning block 5 allows for quick replacement of different specifications of tool holder positioning blocks 5 (such as NBT30 / BT30 modules), achieving standard compatibility between dual tool holders and avoiding the gap problem of traditional conversion sleeves. It directly utilizes the precision-machined surface of the positioning block to cooperate with the tool holder, improving clamping rigidity. Furthermore, the modular design reduces maintenance costs, as the tool holder positioning block 5 can be replaced individually after wear, eliminating the need to scrap the entire tool holder.

[0023] In this embodiment, both the tool holder positioning block 5 and the center positioning block 2 have two mounting holes 6, and the positions of the two mounting holes 6 on the tool holder positioning block 5 correspond to the positions of the two mounting holes 6 on the center positioning block 2. Both the tool holder positioning block 5 and the center positioning block 2 are detachably connected to the cutter head by bolts passing through the mounting holes 6. The bolts can simultaneously pass through the corresponding mounting holes 6 on the tool holder positioning block 5 and the center positioning block 2, and then connect to the cutter head. This method allows for the simultaneous installation of the tool holder positioning block 5 and the center positioning block 2, and also allows the center positioning block 2 to be used as a support structure, improving the overall structural stability.

[0024] In this embodiment, each of the jaws 1 is provided with a countersunk hole 7 and a countersunk groove 9. A fixing hole is provided on the cutter head position corresponding to the countersunk hole 7. A fixing screw is provided for each countersunk hole 7. The fixing screw passes through the countersunk hole 7 and is fixedly connected to the corresponding fixing hole. The fixing screw passes through the countersunk hole 7 and is connected to the cutter head fixing hole, forming a lever fulcrum for adjustable preload. By adjusting the screw tightening depth, the initial opening of the jaw 1 is controlled to adapt to the insertion resistance of different cutter heads.

[0025] In this embodiment, the countersunk hole 7 is circular, and a limiting ring 8 is installed on its inner circumference. The limiting ring 8 restricts the axial displacement of the fixing screw and prevents the claw 1 from deforming due to over-tightening.

[0026] In this embodiment, the recess 9 is located on the side of the jaw 1 near the tool holder positioning block 5. The recess 9 is a rectangle with rounded corners and a through hole 10 in the middle. The rounded corners can reduce stress concentration, and the through hole 10 further reduces the weight of the jaw 1 and improves the dynamic response speed. The through hole 10 can be used to integrate sensors (such as clamping force monitoring) or to assist in cleaning chips by inserting steel wire.

[0027] In this embodiment, the side of the chuck 1 away from the sinker 9 is hollowed out, and the top of the hollowed-out part corresponds to the top of the sinker 9. The bottom of the hollowed-out part extends to the bottom of the chuck 1. The hollowed-out design can achieve a lightweight design of the chuck 1, reduce rotational inertia, and improve the tool changing speed.

[0028] In this embodiment, the inner side of the claw 1 is arranged in an inner arc shape, and transitions to an outer inclined surface through the outer arc transition surface at the bottom position. The inner side of the block 4 is arranged in an inner arc shape, and transitions to an outer inclined surface through the outer arc transition surface at the bottom position.

[0029] In this embodiment, a stabilizing hole 11 is provided on the upper inner side of the jaw 1. A fixing pin is installed in the stabilizing hole 11. The end of the spring 3 is located in the stabilizing hole 11 and is sleeved on the outside of the fixing pin. The fixing pin ensures that the pressure direction of the spring 3 is perpendicular to the axis of the tool holder, avoiding deformation caused by lateral force. The stabilizing hole 11 can limit the position of the end of the spring 3, improve the stability of the spring 3, and make it unnecessary for the spring 3 to be fixedly connected to the jaw 1, which facilitates the replacement of the spring 3.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A stable tool holder, comprising two jaws, a central positioning block, and a spring, wherein the two jaws are symmetrically mounted on a tool disc and can be opened or closed relative to each other; the central positioning block is fixed to the edge surface of the tool disc and located between the two jaws; and the spring is connected between the rear ends of the two jaws and located behind the central positioning block, characterized in that: The inner sides of the two jaws are provided with clamping blocks for clamping the tool holder, and the central positioning block is detachably mounted with a tool holder positioning block adapted to the NBT30 / BT30 module; Both the tool holder positioning block and the center positioning block have two mounting holes, and the positions of the two mounting holes on the tool holder positioning block correspond to the positions of the two mounting holes on the center positioning block. Both the tool holder positioning block and the center positioning block are detachably connected to the tool disc by means of bolts passing through the mounting holes.

2. The stable tool holder according to claim 1, characterized in that: Each of the jaws is provided with a countersunk hole and a countersunk groove. A fixing hole is provided at the corresponding cutter head position of the countersunk hole. A fixing screw is provided for each countersunk hole, and the fixing screw passes through the countersunk hole and is fixedly connected to the corresponding fixing hole.

3. A stable tool holder according to claim 2, characterized in that: The countersunk hole is circular, and a limit ring is installed on its inner circumference.

4. A stable tool holder according to claim 3, characterized in that: The countersink is located on the side of the chuck near the tool holder positioning block. The countersink is a rectangle with rounded corners and a through hole in the middle.

5. A stable tool holder according to claim 4, characterized in that: The side of the claw away from the sinker has a hollow design, and the top of the hollow part corresponds to the top of the sinker, while the bottom of the hollow part extends to the bottom of the claw.

6. A stable tool holder according to claim 5, characterized in that: The inner side of the claw is set in an inner arc shape, and transitions to an outer inclined surface through an outer arc transition surface at the bottom position. The inner side of the block is set in an inner arc shape, and transitions to an outer inclined surface through an outer arc transition surface at the bottom position.

7. A stable tool holder according to claim 1, characterized in that: A stabilizing hole is provided on the upper part of the inner side of the claw, and a fixing pin is installed in the stabilizing hole. The end of the spring is set in the stabilizing hole and sleeved on the outside of the fixing pin.

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