Tool clamping device and processing equipment

Abstract

This invention provides a tool clamping device and machining equipment, relating to the field of machining equipment technology. The tool clamping device includes: a drive shaft with a cavity formed within it; a tool drawbar passing through the cavity, the drive shaft being adapted to drive the tool drawbar to rotate forward or backward; a tool clamping sleeve with a clamping groove forming within it to hold the tool body, the tool clamping sleeve being connected to a first end of the tool drawbar, the groove wall radially abutting against the cavity wall; a locking mechanism and a fastener, the fastener being connected to a second end of the tool drawbar, the locking mechanism being adapted to abut against the fastener to allow the tool drawbar to rotate relative to the fastener; wherein, when the tool drawbar rotates forward relative to the fastener, the tool drawbar moves toward the fastener, causing the clamping groove to radially contract. The tool clamping device provided by this invention has a small structure and can achieve rapid and convenient tool clamping, improving clamping efficiency.

Description

Technical Field

[0001] This invention relates to the field of machining equipment technology, and in particular to a tool clamping device and machining equipment. Background Technology

[0002] In machining, workpieces are milled and drilled using cutting tools to create various structures. Clamping the cutting tools is a crucial machining step.

[0003] Existing tool clamping devices typically rely on external power media such as hydraulic systems or compressed air to clamp tools. These devices have complex structures and require cumbersome clamping procedures, which are time-consuming and labor-intensive, thus affecting machining efficiency. Summary of the Invention

[0004] In order to solve at least one of the technical problems existing in the background art, the present invention provides a tool clamping device with a small structure and a fast and convenient tool clamping, thereby improving clamping efficiency.

[0005] The present invention also provides a processing device.

[0006] A first aspect of the present invention provides a tool clamping device, comprising:

[0007] A drive shaft, wherein a cavity is formed within the drive shaft;

[0008] A tool drawbar passes through the cavity, and the drive shaft is adapted to drive the tool drawbar to rotate forward or in the reverse direction;

[0009] A tool holder, wherein a groove for holding a tool body is formed inside the tool holder, the tool holder is connected to the first end of the tool pull rod, and the groove wall is radially abutted against the cavity wall of the tube.

[0010] A locking mechanism and a fastener, wherein the fastener is connected to the second end of the cutter pull rod, and the locking mechanism is adapted to abut against the fastener to allow the cutter pull rod to rotate relative to the fastener;

[0011] When the cutter pull rod rotates in the forward direction relative to the fastener, the cutter pull rod moves toward the fastener to cause the clamping groove to contract radially.

[0012] According to one embodiment of the present invention, the locking mechanism includes a sleeve, a steel ball, an electromagnet, and an armature bolt;

[0013] The first end of the sleeve is fitted onto the fastener, and the steel ball is embedded in the gap between the sleeve and the fastener. When the sleeve moves toward the direction of the cutter pull rod, it radially compresses the steel ball so that the steel ball abuts against the fastener.

[0014] The electromagnet is disposed inside the sleeve, and part of the armature bolt passes through the second end of the sleeve;

[0015] The electromagnet is adapted to drive the armature bolt to move toward the electromagnet after being energized, with one end of the armature bolt exposed on the sleeve abutting against the second end of the sleeve to drive the sleeve to move toward the tool drawbar.

[0016] According to one embodiment of the present invention, the fastener includes a first nut, and the second end of the cutter pull rod forms an external thread adapted to the first nut;

[0017] A groove is formed on the outer circumferential surface of the first nut, and the steel ball abuts against the groove;

[0018] The locking mechanism further includes a second nut that matches the armature bolt, the second nut being connected to one end of the armature bolt exposed on the sleeve;

[0019] The locking mechanism also includes an armature plate connected to one end of the armature bolt located inside the sleeve;

[0020] The armature bolt is magnetically connected to the electromagnet via the armature plate.

[0021] According to one embodiment of the present invention, the fastener further includes a third nut;

[0022] The second end of the cutter pull rod forms an external thread that is adapted to the third nut;

[0023] The second end of the cutter pull rod is connected in sequence to the third nut and the first nut.

[0024] According to one embodiment of the present invention, the locking mechanism further includes a tool retraction stop pin, which is disposed on the side of the fastener facing the sleeve.

[0025] According to one embodiment of the present invention, the drive shaft includes a splined shaft, and the cavity is formed within the splined shaft;

[0026] A radial through hole is formed on the tool drawbar;

[0027] A spring is embedded in the radial through hole, and steel balls are provided at both ends of the spring, with the steel balls abutting against the cavity wall of the tube.

[0028] According to one embodiment of the present invention, the tool clamping device further includes a rotary drive motor, gears, and bushings;

[0029] The bushing is fitted onto the transmission shaft, the gear is fitted onto the bushing, and the rotary drive motor is adapted to drive the gear to rotate.

[0030] According to one embodiment of the present invention, the tool clamping device further includes a control panel, which is electrically connected to the rotary drive motor.

[0031] According to one embodiment of the present invention, the groove wall of the clamping groove includes a plurality of jaws, and when the tool pull rod moves toward the fastener, the jaws radially close to cause the clamping groove to radially contract.

[0032] A second aspect of the present invention provides a processing apparatus, including a tool body and a tool clamping device as described in any of the embodiments of the first aspect above;

[0033] The tool body is clamped in the tool clamping device.

[0034] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0035] According to the first aspect of the present invention, the tool clamping device generates an axial force during movement by rotating the tool pull rod, which drives the tool clamp to move, thereby enabling the transmission shaft to generate a radial force on the tool clamp, so as to cause the clamping groove on the tool clamp to radially contract and achieve tool clamping. Specifically, the tool clamping device includes a drive shaft, a tool drawbar, a tool sleeve, a locking mechanism, and fasteners. The tool body can be clamped in the groove of the tool sleeve, which can radially contract to clamp the tool body. The tool sleeve is connected to the first end of the tool drawbar. When the tool drawbar rotates forward under the drive of the drive shaft, it synchronously drives the tool sleeve and the tool body to rotate forward. Since the fastener is connected to the second end of the tool drawbar, when the tool drawbar rotates forward, it also synchronously drives the fastener to rotate forward. Furthermore, after the locking mechanism abuts against the fastener, the fastener stops rotating. At this time, the tool drawbar rotates relative to the fastener and can move towards the fastener, further synchronously driving the tool body and the tool sleeve to move towards the fastener. Since the drive shaft does not move, the tool sleeve is equivalent to moving into the cavity of the drive shaft. The cavity wall can radially compress the groove wall of the tool sleeve, causing the groove to radially contract, thereby achieving clamping of the tool body. The aforementioned forward rotation is determined based on whether the tool drawbar moves towards the fastener. For example, if the tool drawbar rotates clockwise relative to the fastener, the fastener can exert a pulling force on the tool drawbar to make it move towards the fastener; then this clockwise rotation can be defined as forward rotation. Similarly, if the tool drawbar rotates counterclockwise relative to the fastener, the fastener can exert a pulling force on the tool drawbar to make it move towards the fastener; then this counterclockwise rotation can be defined as forward rotation. In summary, the tool clamping device provided in this embodiment of the invention does not require external power media such as hydraulic systems or compressed air to clamp the tool. It has a small structural volume and can achieve fast and convenient tool clamping, improving clamping efficiency.

[0036] According to the processing equipment provided in the second aspect of the present invention, the tool clamping device thereon has a small structure, can achieve fast and portable tool clamping, and has high clamping efficiency. Specifically, the tool clamping device generates axial force during movement by rotating the tool drawbar, which drives the tool holder to move, thereby enabling the drive shaft to generate radial force on the tool holder, so that the clamping groove on the tool holder radially contracts to achieve tool clamping. The tool clamping device includes a drive shaft, a tool drawbar, a tool collet, a locking mechanism, and fasteners. The tool body can be clamped in the groove of the tool collet. The groove can contract radially to clamp the tool body. The tool collet is connected to the first end of the tool drawbar. When the tool drawbar rotates forward under the drive of the drive shaft, it synchronously drives the tool collet and the tool body to rotate forward. Since the fastener is connected to the second end of the tool drawbar, when the tool drawbar rotates forward, it also synchronously drives the fastener to rotate forward. Furthermore, after the locking mechanism abuts against the fastener, the fastener stops rotating. At this time, the tool drawbar rotates relative to the fastener and can move towards the fastener. This further synchronously drives the tool body and the tool collet to move towards the fastener. Since the drive shaft does not move, the tool collet is equivalent to moving into the cavity of the drive shaft. The cavity wall can radially compress the groove wall of the tool collet, causing the groove to contract radially, thereby clamping the tool body. The aforementioned forward rotation is determined based on whether the tool drawbar moves towards the fastener. For example, if the tool drawbar rotates clockwise relative to the fastener, the fastener can exert a pulling force on the tool drawbar to make it move towards the fastener; then this clockwise rotation can be defined as forward rotation. Similarly, if the tool drawbar rotates counterclockwise relative to the fastener, the fastener can exert a pulling force on the tool drawbar to make it move towards the fastener; then this counterclockwise rotation can be defined as forward rotation. In summary, the machining equipment provided by the embodiments of the present invention does not require external power media such as hydraulic systems or compressed air to clamp the tool, and its structural volume is optimized. It can achieve fast and convenient tool clamping, improving both tool clamping efficiency and machining efficiency. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the overall structure of the tool clamping device provided in an embodiment of the present invention;

[0039] Figure 2 yes Figure 1The exploded view of the tool clamping device shown is shown.

[0040] Figure 3 yes Figure 2 The diagram shows the structure at point A.

[0041] Figure label:

[0042] 10. Tool body;

[0043] 20. Drive shaft;

[0044] 30. Cutting tool drawbar; 310. Steel ball;

[0045] 40. Tool holder;

[0046] 50. Locking mechanism; 510. Sleeve; 520. Steel ball; 530. Electromagnet; 540. Armature bolt; 550. Second nut; 560. Armature plate; 570. Retracting stop pin;

[0047] 60. Fastener; 610. First nut; 611. Groove; 620. Third nut;

[0048] 70. Gear;

[0049] 80. Bushing. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0051] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0053] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0054] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0055] like Figures 1 to 3 As shown, a first aspect of the present invention provides a tool clamping device, including a drive shaft 20, a tool pull rod 30, a tool clamping sleeve 40, a locking mechanism 50, and a fastener 60. A cavity is formed within the drive shaft 20; the tool pull rod 30 passes through the cavity, and the drive shaft 20 is adapted to drive the tool pull rod 30 to rotate in the forward or reverse direction; a clamping groove for clamping a tool body 10 is formed within the tool clamping sleeve 40, and the tool clamping sleeve 40 is connected to a first end of the tool pull rod 30, with the groove wall radially abutting against the cavity wall; the fastener 60 is connected to a second end of the tool pull rod 30, and the locking mechanism 50 is adapted to abut against the fastener 60 to cause the tool pull rod 30 to rotate relative to the fastener 60; wherein, when the tool pull rod 30 rotates in the forward direction relative to the fastener 60, the tool pull rod 30 moves toward the fastener 60, causing the clamping groove to radially contract.

[0056] The drive shaft 20, which transmits driving force, transmits rotational driving force in this embodiment of the invention. The tool drawbar 30 is typically a rod-shaped structure, passing through the cavity of the drive shaft 20. When the drive shaft 20 rotates, it drives the tool drawbar 30 to rotate. The tool holder 40 is a component used to hold the tool body 10. The tool holder 40 is connected to the first end of the tool drawbar 30. When the groove on the tool holder 40 is subjected to radial force applied by the cavity wall, it can radially contract. In its natural state, the groove is in an open / closed state, and its opening diameter is typically larger than the diameter of the tool drawbar 30 to facilitate the tool drawbar 30 entering the groove. The groove wall can be designed as an outer cone, and the position in the cavity that abuts against the groove wall can be designed as an inner cone. When the tool holder 40 moves towards the cavity, the inner cone surface presses against the outer cone surface, thereby applying radial force to the groove wall. Fastener 60 is a component used to connect the second end of the tool drawbar 30. When the locking mechanism 50 is not engaged with the fastener 60, the fastener 60 can rotate together with the tool drawbar 30. Therefore, no pulling force is generated between the fastener 60 and the tool drawbar 30. When the locking mechanism 50 is engaged with the fastener 60 to stop its rotation, the tool drawbar 30 rotates relative to the fastener 60. At this time, the fastener 60 can generate a pulling force on the tool drawbar 30. For example, if the tool drawbar 30 and the fastener 60 are threadedly connected, when the tool drawbar 30 rotates, due to the action of the thread, the tool drawbar 30 will move toward the fastener 60 and eventually be tightened to the fastener 60.

[0057] According to the first aspect of the present invention, the tool clamping device generates an axial force during movement by rotating the tool pull rod 30, which drives the tool clamp 40 to move. This, in turn, allows the drive shaft 20 to generate a radial force on the tool clamp 40, causing the clamping groove on the tool clamp 40 to radially contract and clamp the tool. Specifically, the tool clamping device includes a drive shaft 20, a tool pull rod 30, a tool clamp 40, a locking mechanism 50, and a fastener 60. The tool body 10 can be clamped in the clamping groove of the tool clamp 40, which can radially contract to clamp the tool body 10. The tool clamp 40 is connected to the first end of the tool pull rod 30. When the tool pull rod 30 rotates forward under the drive of the drive shaft 20, it simultaneously drives the tool clamp 40 and the tool body 10 to rotate forward. Since the fastener 60 is connected to the second end of the tool pull rod 30, when the tool pull rod 30 rotates forward, it also simultaneously drives the fastener 60. 0. Rotating in the forward direction, further, after the locking mechanism 50 abuts against the fastener 60, the fastener 60 stops rotating. At this time, the tool pull rod 30 rotates relative to the fastener 60, and the tool pull rod 30 can move towards the fastener 60, further synchronously driving the tool body 10 and the tool clamp 40 to move towards the fastener 60. Since the transmission shaft 20 does not move, the tool clamp 40 is equivalent to moving into the cavity of the transmission shaft 20. The cavity wall can radially compress the groove wall of the tool clamp 40, and the groove radially contracts, thereby achieving clamping of the tool body 10. The aforementioned forward rotation is determined based on whether the tool drawbar 30 moves toward the fastener 60. For example, if the tool drawbar 30 rotates clockwise relative to the fastener 60, the fastener 60 can exert a pulling force on the tool drawbar 30 to make it move toward the fastener 60; then this clockwise rotation can be defined as forward rotation. Similarly, if the tool drawbar 30 rotates counterclockwise relative to the fastener 60, the fastener 60 can exert a pulling force on the tool drawbar 30 to make it move toward the fastener 60; then this counterclockwise rotation can be defined as forward rotation. In summary, the tool clamping device provided in this embodiment of the invention does not require external power media such as hydraulic systems or compressed air to clamp the tool. It has a small structural volume and can achieve fast and convenient tool clamping, improving clamping efficiency.

[0058] like Figure 1 and Figure 2As shown, in an embodiment of the present invention, the locking mechanism 50 includes a sleeve 510, a steel ball 520, an electromagnet 530, and an armature bolt 540. The first end of the sleeve 510 is sleeved on the fastener 60, and the steel ball 520 is embedded in the gap between the sleeve 510 and the fastener 60. When the sleeve 510 moves toward the tool pull rod 30, it radially compresses the steel ball 520 so that the steel ball 520 abuts against the fastener 60. The electromagnet 530 is disposed inside the sleeve 510, and a portion of the armature bolt 540 passes through the second end of the sleeve 510. The electromagnet 530 is adapted to drive the armature bolt 540 to move toward the electromagnet 530 after being energized. One end of the armature bolt 540 exposed outside the sleeve 510 abuts against the second end of the sleeve 510 to drive the sleeve 510 to move toward the tool pull rod 30. The locking mechanism 50 uses electromagnetic transmission to drive the sleeve 510 to move in order to lock the fastener 60. Specifically, in the initial state, the tool pull rod 30, the tool body 10, the fastener 60, and the drive shaft 20 rotate synchronously. When it is necessary to lock the tool body 10, the solenoid 530 is energized to make the solenoid 530 magnetic. The armature bolt 540 is attracted by the magnet and moves toward the solenoid 530 and comes into contact with the solenoid 530. During this process, the armature bolt 540 can abut against the second end of the sleeve 510, thereby applying a driving force to the sleeve 510. Under the action of the driving force, the sleeve 510 moves toward the direction of the tool pull rod 30. At this time, the space between the sleeve 510 and the fastener 60 where the steel ball 520 is placed becomes smaller, so the steel ball 520 can be squeezed. The steel ball 520 further squeezes the fastener 60, thereby stopping the fastener 60 from rotating and realizing the locking of the fastener 60.

[0059] Furthermore, the portion of the sleeve 510 that presses against the steel ball 520 can be designed as a tapered slope, and the portion of the armature bolt 540 that abuts against the second end of the sleeve 510 can be designed with a flange structure, or a nut or similar baffle structure can be provided to increase the contact area.

[0060] like Figure 2 and Figure 3As shown, in an embodiment of the present invention, the fastener 60 includes a first nut 610, and the second end of the cutter pull rod 30 forms an external thread adapted to the first nut 610; a groove 611 is formed on the outer circumferential surface of the first nut 610, and a steel ball 520 abuts against the groove 611; the locking mechanism 50 also includes a second nut 550 matching the armature bolt 540, the second nut 550 being connected to one end of the armature bolt 540 exposed outside the sleeve 510; the locking mechanism 50 also includes an armature iron piece 560, connected to one end of the armature bolt 540 located inside the sleeve 510; the armature bolt 540 is magnetically connected to the electromagnet 530 through the armature iron piece 560. With the above structure, after the fastener 60 is locked, that is, after the first nut 610 is locked, the cutter pull rod 30 rotates within the first nut 610. Due to the thread action, the cutter pull rod 30 moves toward the first nut 610 and is screwed into the first nut 610. A groove 611 is formed on the outer circumferential surface of the first nut 610. When the first nut 610 is tightened, the steel ball 520 abuts against the groove 611. The groove 611 can limit the movement of the steel ball 520, preventing slippage between the steel ball 520 and the first nut 610 and affecting the tightening effect. The armature iron plate 560 can increase the magnetic contact area, making the magnetic adhesion between the armature bolt 540 and the electromagnet 530 more secure, ensuring that the second nut 550 on the armature bolt 540 is tightly abutted against the second end of the sleeve 510.

[0061] like Figures 1 to 3 As shown, in an embodiment of the present invention, the fastener 60 further includes a third nut 620; the second end of the tool pull rod 30 forms an external thread adapted to the third nut 620; the second end of the tool pull rod 30 is sequentially connected to the third nut 620 and the first nut 610. The center hole of the third nut 620 is aligned with the center hole of the first nut 610. The third nut 620 can assist in limiting and fixing the tool pull rod 30, preventing the second end of the tool pull rod 30 from not being aligned with the center hole of the first nut 610, thus affecting the tool clamping. When the first nut 610 is locked, the first nut 610 can apply a compressive force to the third nut 620, and the third nut 620 can serve as a pre-tightening agent.

[0062] like Figure 1 and Figure 2 As shown, in an embodiment of the present invention, the locking mechanism 50 further includes a retraction stop pin 570, which is disposed on the side of the fastener 60 facing the sleeve 510.

[0063] The tool clamping device provided in this embodiment of the invention achieves tool retraction by means of a tool retraction stop pin 570. Specifically, during tool retraction, the drive shaft 20 drives the tool pull rod 30 to rotate in the opposite direction. When the tool pull rod 30 rotates in the opposite direction, it also synchronously drives the fastener 60 to rotate in the opposite direction. Further, referring to the locking process of the locking mechanism 50 on the locking member, the locking mechanism 50 is pressed against the fastener 60, and the fastener 60 stops rotating. At this time, the tool pull rod 30 rotates in the opposite direction relative to the fastener 60, and a force is generated between the tool pull rod 30 and the fastener 60 to move away from each other. The tool retraction stop pin 570 can abut against the fastener. When component 60 restricts the movement of fastener 60, the tool pull rod 30 can only move away from fastener 60, further synchronously driving the tool body 10 and tool collet 40 to move away from fastener 60. Since the drive shaft 20 does not move, the tool collet 40 is equivalent to being dislodged from the cavity of the drive shaft 20. The radial compression effect of the cavity wall on the groove wall of the tool collet 40 becomes smaller and smaller, and the groove expands radially, thereby releasing the locking of the tool body 10 and completing the tool retraction.

[0064] In an embodiment of the present invention, the transmission shaft 20 includes a splined shaft with a cavity formed inside; a radial through hole is formed on the tool drawbar 30; a spring is embedded in the radial through hole, and steel balls 310 are provided at both ends of the spring, with the steel balls 310 abutting against the cavity wall. The transmission efficiency of the splined shaft is higher than that of a conventional keyed shaft because the spline fit is more precise and stable, the transmitted torque is more uniform, and the loss of transmission efficiency is reduced. The transmission method of the splined shaft relies on the interlocking spline connection, which has a higher interlocking effect than that of a keyed shaft, resulting in more stable force transmission and effectively preventing transmission slippage and other faults, thereby improving reliability. The splined shaft can withstand certain lateral and axial loads, ensuring transmission safety. The spring provided in the radial through hole on the tool drawbar 30 can drive the steel balls 520 to always abut against the cavity wall of the splined shaft, ensuring the transmission friction between the steel balls 520 and the cavity wall and preventing slippage between the splined shaft and the tool drawbar 30.

[0065] In an embodiment of the present invention, the tool clamping device further includes a rotary drive motor, a gear 70, and a bushing 80; the bushing 80 is sleeved on the transmission shaft 20, the gear 70 is sleeved on the bushing 80, and the rotary drive motor is adapted to drive the gear 70 to rotate. The rotary drive motor drives the transmission shaft 20 to rotate through gear transmission. Gear transmission is relatively accurate, efficient, compact, reliable, and has a long service life. The bushing 80 can protect the transmission shaft 20.

[0066] In an embodiment of the present invention, the tool clamping device further includes a control panel, which is electrically connected to the rotary drive motor. The control panel may integrate control buttons such as a device power switch, a motor forward rotation button, a motor reverse rotation button, a speed adjustment button, and an emergency stop button to facilitate operator control of the device.

[0067] In an embodiment of the invention, the groove wall includes multiple grippers. When the tool pull rod 30 moves toward the fastener 60, the grippers radially close, causing the groove to radially contract. The multiple grippers are circumferentially distributed, and there are gaps between them. When the cavity wall of the drive shaft 20's tube presses against the grippers, the grippers radially close, causing the groove to radially contract and clamp the tool body 10. In its natural state, the grippers are expanded. At this time, the opening diameter of the groove is larger than the diameter of the tool body 10, so that the tool body 10 can extend into the groove.

[0068] A second aspect of the present invention provides a processing device, including a tool body 10 and a tool clamping device as described in any of the first aspects above, wherein the tool body 10 is clamped in the tool clamping device. The processing device can be a large machining equipment, including a boring machine, a drilling machine, etc., with the tool clamping device mounted on its robotic arm. Alternatively, the processing device can be a small, handheld, or portable mobile machining equipment, which, in conjunction with the tool clamping device, enables flexible and multi-scenario machining.

[0069] According to the processing equipment provided in the second aspect of the present invention, the tool clamping device thereon has a small structure, can achieve fast and portable tool clamping, and has high clamping efficiency. Specifically, the tool clamping device generates axial force during movement by rotating the tool pull rod 30, which drives the tool sleeve 40 to move, thereby enabling the transmission shaft 20 to generate radial force on the tool sleeve 40, so that the clamping groove on the tool sleeve 40 radially contracts to achieve tool clamping. The tool clamping device includes a drive shaft 20, a tool pull rod 30, a tool clamping sleeve 40, a locking mechanism 50, and a fastener 60. The tool body 10 can be clamped in the clamping groove of the tool clamping sleeve 40. The clamping groove can retract radially to clamp the tool body 10. The tool clamping sleeve 40 is connected to the first end of the tool pull rod 30. When the tool pull rod 30 rotates forward under the drive of the drive shaft 20, it synchronously drives the tool clamping sleeve 40 and the tool body 10 to rotate forward. Since the fastener 60 is connected to the second end of the tool pull rod 30, when the tool pull rod 30 rotates forward, it also synchronously drives the fastener 60 to rotate forward. As the device rotates, the locking mechanism 50 abuts against the fastener 60, and the fastener 60 stops rotating. At this time, the tool pull rod 30 rotates relative to the fastener 60, and the tool pull rod 30 can move toward the fastener 60. This further synchronously drives the tool body 10 and the tool clamp 40 to move toward the fastener 60. Since the drive shaft 20 does not move, the tool clamp 40 moves into the cavity of the drive shaft 20. The cavity wall can radially compress the groove wall of the tool clamp 40, causing the groove to contract radially, thereby clamping the tool body 10. The aforementioned forward rotation is determined based on whether the tool drawbar 30 moves toward the fastener 60. For example, if the tool drawbar 30 rotates clockwise relative to the fastener 60, the fastener 60 can exert a pulling force on the tool drawbar 30 to make it move toward the fastener 60; then this clockwise rotation can be defined as forward rotation. Similarly, if the tool drawbar 30 rotates counterclockwise relative to the fastener 60, the fastener 60 can exert a pulling force on the tool drawbar 30 to make it move toward the fastener 60; then this counterclockwise rotation can be defined as forward rotation. In summary, the processing equipment provided by the embodiments of the present invention does not require external power media such as hydraulic systems or compressed air to clamp the tool, and the structural volume is also optimized. It can achieve fast and convenient tool clamping, and both tool clamping efficiency and machining efficiency are improved.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tool clamping device, characterized in that, include: A drive shaft, wherein a cavity is formed within the drive shaft; A tool drawbar passes through the cavity, and the drive shaft is adapted to drive the tool drawbar to rotate forward or in the reverse direction; A tool holder, wherein a groove for holding a tool body is formed inside the tool holder, the tool holder is connected to the first end of the tool pull rod, and the groove wall is radially abutted against the cavity wall of the tube. A locking mechanism and a fastener, wherein the fastener is connected to the second end of the cutter pull rod, and the locking mechanism is adapted to abut against the fastener to allow the cutter pull rod to rotate relative to the fastener; When the cutter pull rod rotates in the forward direction relative to the fastener, the cutter pull rod moves toward the fastener so that the clamping groove contracts radially. The locking mechanism includes a sleeve, a steel ball, an electromagnet, and an armature bolt. The first end of the sleeve is fitted onto the fastener, and the steel ball is embedded in the gap between the sleeve and the fastener. When the sleeve moves toward the tool drawbar, it radially compresses the steel ball, causing the steel ball to press against the fastener. The electromagnet is disposed within the sleeve, and a portion of the armature bolt passes through the second end of the sleeve. The electromagnet is adapted to drive the armature bolt to move toward the electromagnet after being energized. One end of the armature bolt exposed on the sleeve abuts against the second end of the sleeve, thereby driving the sleeve to move toward the tool drawbar. The fastener includes a first nut, and the second end of the cutter pull rod forms an external thread adapted to the first nut; a groove is formed on the outer circumferential surface of the first nut, and the steel ball abuts against the groove; the locking mechanism further includes a second nut matching the armature bolt, the second nut being connected to one end of the armature bolt exposed in the sleeve; the locking mechanism further includes an armature plate, connected to one end of the armature bolt located inside the sleeve; the armature bolt is magnetically connected to the electromagnet through the armature plate; In the initial state, the tool drawbar, the tool body, the fastener, and the drive shaft rotate synchronously. When it is necessary to lock the tool body, the electromagnet is energized to make it magnetic. The armature bolt is attracted by the magnet and moves toward the electromagnet and comes into contact with it. The armature bolt abuts against the second end of the sleeve to apply a driving force to the sleeve. Under the action of the driving force, the sleeve moves toward the direction of the tool drawbar. The space between the sleeve and the fastener where the steel ball is placed becomes smaller to squeeze the steel ball. The steel ball squeezes the fastener to stop the fastener from rotating, thereby locking the fastener.

2. The tool clamping device according to claim 1, characterized in that, The fastener also includes a third nut; The second end of the cutter pull rod forms an external thread that is adapted to the third nut; The second end of the cutter pull rod is connected in sequence to the third nut and the first nut.

3. The tool clamping device according to any one of claims 1 to 2, characterized in that, The locking mechanism further includes a tool retraction stop pin, which is disposed on the side of the fastener facing the sleeve.

4. The tool clamping device according to any one of claims 1 to 2, characterized in that, The drive shaft includes a splined shaft, and the cavity is formed inside the splined shaft; A radial through hole is formed on the tool drawbar; A spring is embedded in the radial through hole, and steel balls are provided at both ends of the spring, with the steel balls abutting against the cavity wall of the tube.

5. The tool clamping device according to any one of claims 1 to 2, characterized in that, The tool clamping device also includes a rotary drive motor, gears, and bushings; The bushing is fitted onto the transmission shaft, the gear is fitted onto the bushing, and the rotary drive motor is adapted to drive the gear to rotate.

6. The tool clamping device according to claim 5, characterized in that, The tool clamping device also includes a control panel, which is electrically connected to the rotary drive motor.

7. The tool clamping device according to any one of claims 1 to 2, characterized in that, The groove wall includes multiple jaws. When the tool pull rod moves toward the fastener, the jaws close radially to cause the groove to contract radially.

8. A processing equipment, characterized in that, include: The tool body, and the tool clamping device as described in any one of claims 1 to 7; The tool body is clamped in the tool clamping device.

Images