A multifunctional electric knife holder

Abstract

The present invention discloses a multifunctional electric tool holder, which is an electric tool holder used on a lathe, and can realize automatic tool change and tool status monitoring, and can control the operation of the lathe according to the tool status feedback. It includes a tool holder body, a machine clamp turning tool, a signal acquisition cover and a controller; the controller is independently arranged; the tool holder body includes a motor, a coupling, a lower tool body, a middle shaft, an upper tool body, a worm, a bearing, a worm gear, a screw, a lower clutch plate, a clutch pin, an upper clutch plate, a thrust ball bearing, a stop ring, a signal transmission plate and a cover seat; the machine clamp turning tool includes a tool body, a fixed block, a blade and a gasket-shaped temperature sensor; the signal acquisition cover is assembled on the tool holder body, and the information acquisition cover is used to collect the temperature and vibration information of the blade of the machine clamp turning tool; the signal acquisition cover includes an electromagnetic shielding layer, a wireless charging transmitting module, a wireless charging receiving module, an inner aluminum cover, an outer aluminum cover, a fixed bracket, an acceleration sensor, a wireless sensor and an infrared temperature sensor.

Description

Technical Field

[0001] The invention discloses a multifunctional electric tool rest, which relates to an electric tool rest used on a lathe, and can realize automatic tool change and tool state monitoring, and can control the operation of the lathe according to tool state feedback. Background Art

[0002] The electric tool rest is an important functional component of a CNC lathe, and its performance directly affects the cutting performance and operational reliability of the lathe. The current electric tool rests with worm gear transmission and toothed disc meshing structure have the advantages of fast indexing, stable performance, and high positioning accuracy. However, most of these electric tool rests have relatively single functions and cannot effectively sense and monitor the tool status during the machining process. Summary of the invention

[0003] The purpose of the present invention is to address the shortcomings of ordinary electric tool holders and propose a multifunctional electric tool holder. The temperature and vibration information of the tool are collected in real time by an acceleration sensor and a temperature sensor, and the operation of the machine tool is controlled by an electric tool holder controller. This can improve the processing accuracy of parts, extend the service life of the tool, avoid possible production accidents, and make the lathe cutting process more intelligent and controllable.

[0004] The present invention is achieved by adopting the following technical solutions:

[0005] A multifunctional electric tool holder, comprising a tool holder body, a machine clamp turning tool, a signal collection cover and a controller; the controller is independently arranged, and the controller adopts a PLC controller;

[0006] The tool holder body adopts worm gear transmission, clutch pin and clutch plate guidance, and the end face teeth of the upper tool body and the lower tool body are meshed with each other for positioning and locking;

[0007] The tool holder body includes a machine, a coupling, a lower tool body, a middle shaft, an upper tool body, a worm, a bearing, a worm wheel, a screw, a lower clutch plate, a clutch pin, an upper clutch plate, a thrust ball bearing, a stop ring, a signal plate and a cover seat;

[0008] The coupling is a card sleeve structure, connecting the motor rotor and the worm;

[0009] Two bearings are respectively assembled in the lower cutter body and located at both ends of the worm;

[0010] The lower cutter body is a rectangular parallelepiped structure, and the upper surface is provided with end face teeth;

[0011] The middle shaft is fixed on the lower cutter body, the upper part of the middle shaft is a hollow round tube, and the top of the round tube is provided with an external thread; the lower part of the middle shaft is a disc, and there is a positioning step on the disc for assembly and positioning with the lower cutter body; a worm wheel, a screw, an upper clutch disc, a thrust ball bearing, a stop ring and a signal disc are coaxially mounted on the middle shaft; the worm wheel is concentrically mounted on the upper surface of the disc at the lower part of the middle shaft, and the screw and the worm wheel are matched through a keyway; the upper clutch disc and the screw are matched through two locating pins, and when the motor drives the screw to rotate, the worm wheel, the screw and the upper clutch disc keep rotating synchronously; the thrust ball bearing, the stop ring and the signal disc are sequentially mounted above the upper clutch disc and fastened by a nut.

[0012] The upper tool body is a rectangular structure with a concave platform along the four outer walls for placing the machine-clamped turning tool. The screws pass through the upper surface of the upper tool body to fasten the machine-clamped turning tool in the concave platform; a through hole with an internal thread is provided in the middle of the upper tool body, and the internal thread cooperates with the external thread on the screw; the lower surface of the upper tool body is provided with end face teeth, which mesh with the end face teeth on the upper surface of the lower tool body.

[0013] An upper clutch plate through hole is provided in the middle of the upper clutch plate, and the diameter of the upper clutch plate through hole is larger than the diameter of the middle shaft tube; the upper clutch plate is fixed to the upper end of the screw by two positioning pins, and the upper clutch plate rotates synchronously with the screw; the lower surface of the upper clutch plate has a radial groove passing through the center of the circle, and the cross-section of the groove is in the shape of a right-angled trapezoid, and the top ends of the two clutch pins are respectively limited in the grooves on both sides of the center of the upper clutch plate.

[0014] A through hole is provided in the middle of the lower clutch disc, and the diameter of the through hole is larger than the diameter of the screw rod; the lower clutch disc is sleeved on the screw rod and fixed on the lower cutter body by screws; there are four radial grooves on the upper surface of the lower clutch disc, which are 90 degrees apart from each other on the circumference, and the cross section of the grooves is in the shape of a right-angle trapezoid, and the two angles at the bottom of the grooves are 90 degrees and 145 degrees respectively in the clockwise direction, that is, a right-angle slope and an inclined slope are formed;

[0015] The upper end of the clutch pin is arranged in a groove on the lower surface of the upper clutch disc, and the lower end of the clutch pin is in direct contact with the upper surface of the lower clutch disc.

[0016] Furthermore, the clutch pin is an elastic and retractable supporting mechanism, which is composed of an upper cap body, a lower cap body and a spring; the upper cap body and the lower cap body are both cylindrical cover bodies, and the top longitudinal section is a right-angled trapezoidal shape, which respectively cooperate with the right-angled trapezoidal grooves on the upper and lower clutch disks; the spring is assembled between the two cap bodies; there is a protruding support rod in the middle of the lower cap body, and the two clutch pins are respectively assembled in the two through holes inside the lower knife body, and the support rod on the lower cap body plays a role in supporting the weight of the lower knife body and positioning and guiding; due to the supporting effect of the spring, the upper end of the clutch pin is limited to the groove on the lower surface of the upper clutch disk, and the lower end of the clutch pin is in direct contact with the upper surface of the lower clutch disk.

[0017] The thrust ball bearing is mounted on the middle shaft and located on the upper surface of the upper clutch disc.

[0018] The stop ring is installed on the upper surface of the thrust ball bearing and is fixed in position by a wedge key placed in the keyway of the center shaft. The stop ring is fastened with a stop ring fastening nut. The function of the stop ring is to limit the upward movement of the upper clutch plate.

[0019] The signal plate positioning gear ring is installed on the central shaft, located above the retaining ring fastening nut, and is positioned by the positioning key on the inner side of the signal plate positioning gear ring and the positioning keyway of the central shaft.

[0020] The signal transmitting plate is positioned by the inner teeth and the outer teeth of the signal transmitting plate positioning gear ring. Four Hall sensors are evenly distributed in the circumferential direction of the inner circumference of the signal transmitting plate, corresponding to the four tool positions respectively.

[0021] Furthermore, a central axis wiring hole is provided at the upper end of the central axis for routing power supply lines and signal lines of the Hall sensor on the signal transmission disk.

[0022] Furthermore, the signal transmitting plate fastening nut fixes the signal transmitting plate on the central shaft.

[0023] The cover seat is fixed to the top of the upper cutter body by screws. A magnet is installed in the inner groove of the cover seat. When the upper cutter body rotates, the magnet will approach the Hall sensors on the signal transmitting disk. The Hall sensors send signals to obtain the position of the cutter holder.

[0024] The machine-clamped turning tool comprises a tool body, a fixing block, a blade and a gasket-shaped temperature sensor; the blade and the gasket-shaped temperature sensor are both provided with assembly holes of the same diameter; a fixing block is provided on the upper part of the tool body, and one end of the fixing block is fixed to the tool body by a screw; the screw passes through the positioning hole at the other end of the fixing block, the gasket-shaped temperature sensor and the assembly hole on the blade in sequence to fasten the blade and the gasket-shaped temperature sensor to the tool body; a first through hole is provided at the front and rear of the tool body, located at the rear center position of the gasket-shaped temperature sensor to the rear end face of the tool body, a second through hole is provided in the middle of the upper surface of the tool body, the second through hole is vertically connected to the first through hole, and is used for routing the gasket-shaped temperature sensor; the machine-clamped turning tool is clamped on the concave platform inside the upper tool body of the tool holder body by screws.

[0025] Furthermore, the tool holder body can clamp 4 machine-clamped turning tools at the same time.

[0026] The signal acquisition cover is assembled on the tool holder body, and the information acquisition cover is used to collect the temperature and vibration information of the machine clamp turning tool blade; the signal acquisition cover includes an electromagnetic shielding layer, a wireless charging transmitting module, a wireless charging receiving module, an inner aluminum cover, an outer aluminum cover, a fixing bracket, an acceleration sensor, a wireless sensor and an infrared temperature sensor, etc.

[0027] The inner aluminum cover is hollow and equipped with three layers of drawers, namely the upper drawer, the middle drawer and the lower drawer from top to bottom. The upper drawer is equipped with a wireless sensor, which sends the summarized temperature and acceleration information to an independently set controller wirelessly; the middle drawer is equipped with an acceleration sensor to collect the vibration information of the tool body (transmitted via the upper tool body); the lower drawer is equipped with a wireless charging receiving module (which converts magnetic energy into electrical energy) to provide DC power to the acceleration sensor, wireless sensor, infrared temperature sensor and temperature sensor on the machine clamp turning tool.

[0028] Directly below the wireless charging receiving module, a wireless charging transmitting module (converting electrical energy into magnetic energy) and an electromagnetic shielding layer are provided, which are threadedly connected to the central axis of the tool holder body; the power supply of the wireless charging transmitting module is connected through the through hole of the central axis, and the electromagnetic shielding layer is used to isolate the magnetic field of the wireless charging module so that the Hall sensor in the transmitting disk below is not disturbed. The electromagnetic shielding layer is installed on the boss at the upper end of the central axis, and the wireless charging transmitting module is fixed by matching the internal thread with the external thread at the top of the central axis.

[0029] Furthermore, a distance of 1 mm is left between the electromagnetic shielding layer and the upper end of the magnetic base of the tool holder body to prevent friction when the tool holder rotates.

[0030] The end face diameter of the outer aluminum cover is larger than that of the inner aluminum cover, and the outer aluminum cover is fitted on the inner aluminum cover; a fixed bracket is arranged above the outer aluminum cover, and the fixed bracket is in an I-shape, with two parallel horizontal brackets at both ends, and the two ends of the vertical bracket are respectively connected to the horizontal bracket by screws, and two screw holes are opened in the middle of the vertical bracket, and the fixed bracket is installed on the upper part of the outer aluminum cover by screws; there are long holes at both ends of the horizontal bracket, and it is fixed to the horizontal bracket by upper and lower nuts cooperating with the external threads on the infrared temperature sensor; the fixed bracket on the outer aluminum cover also has the function of the wireless sensor antenna in the inner aluminum cover; the infrared temperature sensor is used for non-contact monitoring of the blade temperature on the machine clamp turning tool.

[0031] Furthermore, by adjusting the angle between the transverse bracket and the longitudinal bracket and adjusting the position of the infrared temperature sensor in the long hole of the transverse bracket, the probe of the infrared temperature sensor is aligned with the blade of the machine clamp turning tool.

[0032] The four Hall sensors in the upper tool body signal transmitting disk are connected to the controller by wired means, and are used to sense the current working position of the electric tool holder; the acceleration sensor, infrared temperature sensor, and gasket-shaped temperature sensor signals on the machine clamp turning tool in the signal acquisition cover are transmitted to the wireless sensor by wired means, and the wireless sensor sends the above signals to the controller by wireless means.

[0033] Furthermore, a through hole is opened on the concave platform of the upper tool body to facilitate the routing of the temperature sensor on the machine-clamped turning tool.

[0034] Furthermore, the wireless sensor is fixed in the upper drawer by screws; the acceleration sensor is fixed in the middle drawer by screws; and the wireless charging receiving module is fixed in the lower drawer by screws.

[0035] Furthermore, a fixing seat is provided at the bottom of the outer aluminum cover and the inner aluminum cover of the signal collection cover, and fixing holes are evenly opened around the fixing seat, and screws are passed through the fixing holes to fix the upper blade of the blade holder body. The outer aluminum cover has waterproof and dustproof effects.

[0036] Furthermore, symmetrical wiring holes are provided on the outer side of the upper end of the inner aluminum cover, and downward curved wiring tubes are symmetrically provided on the outer side of the upper end of the outer aluminum cover, which are used to fix the infrared temperature sensor on the bracket and the power supply and signal wiring of the gasket-shaped temperature sensor on the machine clamp turning tool. The wireless charging receiving module in the inner aluminum cover supplies power to the acceleration sensor, wireless sensor, infrared temperature sensor, and gasket-shaped temperature sensor. The data collected by the acceleration sensor, infrared temperature sensor, and gasket-shaped temperature sensor are sent to the controller via the wireless sensor in the inner aluminum cover. The opening of the wiring tube faces downward, which can better play a role in waterproofing and dustproofing.

[0037] Furthermore, the bottoms of the upper drawer, the middle drawer and the lower drawer are hollowed out to facilitate wiring; further, the wireless charging receiving module is placed in the lower drawer.

[0038] The gasket-shaped temperature sensor on the machine-clamped turning tool replaces the traditional gasket on the machine-clamped turning tool, so that it can more accurately sense the temperature of the machine-clamped turning tool blade and improve the monitoring effect.

[0039] Furthermore, the motor is a commercially available three-phase AC asynchronous motor.

[0040] The working principle of the electric tool holder of the present invention:

[0041] The motor of the present invention drives the upper tool body to rotate relative to the lower tool body, thereby driving the machine-clamped turning tool to rotate. A Hall sensor is arranged on the signal transmitting disk in the tool holder body, a gasket-shaped temperature sensor is arranged on the machine-clamped turning tool, an acceleration sensor is arranged in the inner aluminum cover, and four infrared temperature sensors are arranged on the fixed bracket, corresponding to the four machine-clamped turning tools. The position, temperature and vibration of the machine-clamped turning tools can be monitored in real time, automatic tool changing and tool status monitoring can be realized through the controller, and the operation of the lathe can be controlled according to the tool status feedback.

[0042] When changing the tool, the upper tool body rotates, and the wireless charging transmitting module and the central axis remain fixed; the wireless charging receiving module is fixed in the lower drawer of the inner aluminum cover on the upper tool body, and will rotate with the upper tool body; the wireless charging transmitting module and the receiving module are used to realize non-contact continuous power supply to each sensor in the rotating part; the output of each sensor signal in the rotating part is realized through the wireless sensor.

[0043] Advantages of the invention: The multifunctional electric tool holder adopts the working principle of worm gear transmission and gear engagement, with high positioning accuracy and convenient tool installation; it is equipped with Hall sensor, acceleration sensor, temperature sensor, and adopts PLC as the controller, and can observe and control the status information of the electric tool holder tool through the touch screen. It has versatility and can effectively sense and monitor the processing process status. The present invention can be modified on the basis of an ordinary four-station electric tool holder, making full use of the original equipment for intelligent upgrading and transformation. The present invention is particularly suitable for upgrading and transforming the manual tool holder of an ordinary lathe, which can enable the ordinary lathe to realize the automation of tool change and the early warning and processing of abnormal tool working conditions more economically, thereby improving production efficiency and intelligence level. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a schematic diagram of the structure of the tool holder body in the present invention;

[0045] Figure 2 It is a schematic diagram of the central axis structure of the tool holder body of the present invention;

[0046] Figure 3 It is a diagram of the installation sequence of the components mounted on the central axis;

[0047] Figure 4 It is a structural exploded view of the central axis mounting component of the tool holder body of the present invention;

[0048] Figure 5 This is an exploded view of the tool holder body structure of the present invention;

[0049] Figure 6 It is a schematic diagram of the explosion structure of the signal collection cover in the present invention;

[0050] Figure 7 It is a schematic diagram of the explosion structure of the machine clamp turning tool in the present invention;

[0051] Figure 8 It is a schematic diagram of the three-part assembly structure of the present invention;

[0052] Fig. 9 It is a schematic diagram of the structure of the present invention;

[0053] Fig.10 yes Fig. 9 Left view of

[0054] Fig.11 This is the electrical principle diagram of the main circuit of the electric tool holder of the present invention;

[0055] Fig.12 It is the electrical principle diagram of the electric tool rest control circuit of the present invention;

[0056] Fig.13 It is the automatic tool selection flow chart of the present invention;

[0057] Fig.14 It is a flow chart of the inching tool selection program of the present invention;

[0058] Fig.15 is a sensor monitoring information control flow chart of the present invention;

[0059] In the figure:

[0060] 100, tool holder body, 101, motor, 102, sleeve, 103, lower tool body, 104, motor mounting seat, 105, upper tool body, 106, middle shaft, 106-1, disc, 106-2, middle shaft wiring hole, 107, gasket, 108, thrust ball bearing, 109, stop ring, 110, signal transmission disk positioning gear ring, 111, signal transmission disk, 112, cover seat, 113, slot, 114, Hall sensor, 115, worm, 116, bearing, 117, worm wheel, 118, screw, 119, lower clutch disk, 120, clutch pin, 121, upper clutch disk, 122, wedge key, 123, stop ring fastening nut, 124, signal transmission disk fastening nut;

[0061] 200, signal acquisition cover, 201, infrared temperature sensor, 203, bolt, 204, fixing bracket, 207, outer aluminum cover, 208, wiring tube, 210, wireless sensor, 211, upper drawer, 212, acceleration sensor, 213, middle drawer, 215, wireless charging receiving module, 216, lower drawer, 217, inner aluminum cover, 219, wireless charging transmitting module, 220, electromagnetic shielding layer;

[0062] 300. Machine clamp turning tool; 301. Screw; 302. Fixing block; 303. Blade; 304. Gasket-shaped temperature sensor; 305. Tool body; 306. First through hole; 307. Second through hole. DETAILED DESCRIPTION

[0063] Figure 6 In the schematic diagram of the signal collection cover explosion structure, the bracket explodes upward, the drawer explodes to the right, and the rest explodes separately up and down.

[0064] Figure 7 In the schematic diagram of the exploded structure of the machine clamp turning tool, the temperature sensor with gasket is removed and the screw is removed.

[0065] See attached Figures 1 to 10 The multifunctional electric tool holder of the present invention comprises a tool holder body 100, a machine clamp turning tool 300, a signal collection cover 200 and a controller;

[0066] The tool holder body 100 includes a motor 101, a coupling, a lower tool body 103, a middle shaft 106, an upper tool body 105, a worm 115, a bearing 116, a worm wheel 117, a screw 118, a lower clutch plate 119, a clutch pin 120, an upper clutch plate 121, a thrust ball bearing 108, a stop ring 109, a signal plate 111 and a cover seat 112;

[0067] The coupling connects the rotor of the motor 101 and the worm; two bearings 116 are respectively assembled in the lower cutter body 103 and located at both ends of the worm 115.

[0068] The lower blade body 103 is a rectangular parallelepiped structure, with face teeth on the upper surface; the central axis 106 is fixed on the lower blade body 103. The upper part of the central axis 106 is a hollow round tube, with external threads on the top of the round tube; the lower part of the central axis 106 is a disc 106-1, with positioning steps on the disc 106-1 for assembly and positioning with the lower blade body 103; a worm gear 117, a screw rod 118, an upper clutch disc 121, a thrust ball bearing 108, a stop ring 109 and a signaling disc 111 are coaxially mounted on the central axis 106; the worm gear 117 is coaxially mounted on the lower disc of the central axis 106 On the upper surface, the screw 118 cooperates with the worm wheel 117 through a keyway; the upper clutch plate 121 cooperates with the screw 118 through two locating pins. When the motor 101 drives the worm 115 to rotate, the worm wheel 117, the screw 118 and the upper clutch plate 121 keep rotating synchronously; the thrust ball bearing 108, the stop ring 109, the stop ring fastening nut 123, the signal plate 111 and the signal plate fastening nut 124 are installed above the upper clutch plate 121 in sequence.

[0069] A central axis wiring hole 106 - 2 is provided at the upper end of the central axis 106 for routing power supply lines and signal lines of the Hall sensor 114 on the signal transmission disk 111 .

[0070] The upper tool body 105 is a rectangular structure with a concave platform along the four outer walls for placing the machine-clamped turning tool. The screws pass through the upper surface of the upper tool body 105 to fasten the machine-clamped turning tool 300 in the concave platform; a through hole with an internal thread is provided in the middle of the upper tool body 105, and the internal thread cooperates with the external thread on the screw rod 118; the lower surface of the upper tool body 105 is provided with end face teeth, which mesh with the end face teeth on the upper surface of the lower tool body 103.

[0071] An upper clutch plate through hole is provided in the middle of the upper clutch plate 121, and the diameter of the upper clutch plate through hole is larger than the diameter of the central axis 106; the upper clutch plate 121 is fixed to the upper end of the screw 118 by a positioning pin, and the upper clutch plate 121 rotates synchronously with the screw 118; the lower surface of the upper clutch plate 121 has a radial groove passing through the center of the circle, and the cross-section of the groove is in the shape of a right-angled trapezoid, and the top ends of the two clutch pins are respectively limited in the grooves on both sides of the center of the upper clutch plate 121.

[0072] A lower clutch plate through hole is provided in the middle of the lower clutch plate 119, and the diameter of the lower clutch plate through hole is larger than the diameter of the screw rod 118; the lower clutch plate 119 is sleeved on the screw rod 118 and fixed on the lower cutter body 103 by screws; the upper surface of the lower clutch plate 119 has four radial grooves, which are 90 degrees apart from each other on the circumference, and the cross section of the grooves is in the shape of a right-angled trapezoid, and the two angles at the bottom of the grooves are 90 degrees and 145 degrees respectively in the clockwise direction, that is, a right-angle slope and an inclined slope are formed;

[0073] The clutch pin 120 is an elastic and retractable supporting mechanism, which is composed of an upper cap body, a lower cap body and a spring; the upper cap body and the lower cap body are both cylindrical cover bodies, and the top longitudinal section is a right-angled trapezoidal shape, which respectively cooperate with the right-angled trapezoidal grooves on the upper and lower clutch disks; the spring is assembled between the two cap bodies; there is a protruding support rod in the middle of the lower cap body, and the two clutch pins are respectively assembled in the two through holes inside the lower knife body, and the support rod on the lower cap body plays a role in supporting the weight of the lower knife body and positioning and guiding; due to the supporting effect of the spring, the upper end of the clutch pin 120 is limited to the groove on the lower surface of the upper clutch disk 121, and the lower end of the clutch pin 120 is in direct contact with the upper surface of the lower clutch disk 119.

[0074] The thrust ball bearing 108 is mounted on the central shaft 106 and is located on the upper surface of the upper clutch plate 121 .

[0075] The stop ring 109 is installed on the upper surface of the thrust ball bearing 108 and is fixed in position by a wedge key 122 placed in the keyway of the central shaft 106. The stop ring 109 is fastened by a stop ring fastening nut 123. The function of the stop ring 109 is to limit the upward movement of the upper clutch plate 121.

[0076] The signal transmission plate positioning gear ring 110 is installed on the central shaft 106 and is located above the retaining ring fastening nut 123 . The signal transmission plate positioning gear ring 110 is positioned by the positioning key on the inner side of the signal transmission plate positioning gear ring 110 and the positioning key slot of the central shaft 106 .

[0077] The signal transmitting disk 111 is positioned by the inner teeth and the outer teeth of the signal transmitting disk positioning gear ring 110. Four Hall sensors 114 are evenly distributed in the inner circumferential direction of the signal transmitting disk 111, corresponding to four tool positions respectively; the signal transmitting disk fastening nut 124 fixes the signal transmitting disk 111 on the central axis 106.

[0078] The cover seat 112 is fixed to the top of the upper blade body 105 by screws. A magnet is installed in the inner groove 113 of the cover seat 112. When the upper blade body 105 rotates, the magnet will approach the various Hall sensors on the signal transmitting disk 111. The Hall sensors send signals to the controller to obtain the position of the tool holder.

[0079] The machine clamp turning tool 300 includes a tool body 305, a fixing block 302, a blade 303 and a gasket-shaped temperature sensor 304; the blade 303 and the gasket-shaped temperature sensor 304 are provided with assembly holes of the same diameter; the upper part of the tool body 305 is provided with a fixing block 302, one end of the fixing block 302 is fixed to the tool body 305 by a screw 301; the screw 301 passes through the positioning hole at the other end of the fixing block 302, the gasket-shaped temperature sensor 304 and the assembly holes on the blade 303 in sequence. The blade 303 and the gasket-shaped temperature sensor 304 are fastened to the tool body 305 through holes; the tool body 305 is provided with a first through hole 306 at the front and rear, located at the rear center of the gasket-shaped temperature sensor 304 to the rear end face of the tool body 305, and the upper surface of the tool body 305 is provided with a second through hole 307, the second through hole 307 is vertically connected to the first through hole 306, and is used for routing the gasket-shaped temperature sensor 304; the machine-clamped turning tool 300 is clamped on the concave platform of the upper tool body of the tool holder body by screws.

[0080] In this embodiment, the tool holder body 100 can clamp four machine-clamped turning tools 300 at the same time.

[0081] The signal acquisition cover 200 is assembled on the tool holder body 100, and the information acquisition cover 200 is used to collect the temperature and vibration information of the blade 303 of the machine clamp turning tool 300; the signal acquisition cover 200 includes an electromagnetic shielding layer 220, a wireless charging transmitting module 219, a wireless charging receiving module 215, an inner aluminum cover 217, an outer aluminum cover 207, a fixed bracket 204, an acceleration sensor 212, a wireless sensor 210 and an infrared temperature sensor 201, etc.

[0082] The inner aluminum cover 217 is hollow and is equipped with three layers of drawers, which are an upper drawer 211, a middle drawer 213 and a lower drawer 216 from top to bottom. The upper drawer 211 is used to place a wireless sensor 210, which sends the aggregated temperature and acceleration information to an independently set controller wirelessly; the middle drawer 213 is used to place an acceleration sensor 212 to collect tool body vibration information (transmitted via the upper tool body); the lower drawer 216 is used to place a wireless charging receiving module 215 (which converts magnetic energy into electrical energy) to provide power to the acceleration sensor 212, the wireless sensor 210, the infrared temperature sensor 201, and the gasket-shaped temperature sensor 304 on the machine-clamped turning tool 300.

[0083] Directly below the wireless charging receiving module 215, a wireless charging transmitting module 219 (converting electrical energy into magnetic energy) and an electromagnetic shielding layer 220 are provided, which are threadedly connected to the central axis 106 of the tool holder body; the power supply of the wireless charging transmitting module 219 is connected through the through hole of the central axis 106, and the electromagnetic shielding layer 220 is used to isolate the magnetic field of the wireless charging module so that the operation of the Hall sensor 114 in the lower signal transmitting disk 111 is not disturbed. The electromagnetic shielding layer 220 is installed on the boss at the upper end of the central axis 106, and the wireless charging transmitting module 219 is fixed by matching the external thread at the top of the central axis 106 with the internal thread.

[0084] There is a 1 mm distance between the lower end of the electromagnetic shielding layer 220 and the upper end of the magnetic base of the tool holder body to prevent friction when the tool holder rotates.

[0085] The end face diameter of the outer aluminum cover 207 is larger than the end face diameter of the inner aluminum cover 217, and the outer aluminum cover 207 is fitted on the inner aluminum cover 217; a fixed bracket 204 is arranged above the outer aluminum cover 207, and the fixed bracket 204 is I-shaped, and the two ends are parallel to each other as horizontal brackets, and the two ends of the vertical bracket are respectively connected to the horizontal bracket by bolts, and two screw holes are opened in the middle of the vertical bracket, and the fixed bracket is installed on the upper part of the outer aluminum cover 207 by screws; there are long holes at both ends of the horizontal bracket, and the upper and lower nuts are matched with the external threads on the infrared temperature sensor 201 to fix it on the horizontal bracket; the fixed bracket 204 on the outer aluminum cover 207 also has the function of the antenna of the wireless sensor 210 in the inner aluminum cover 217; the infrared temperature sensor 201 is used for non-contact monitoring of the blade temperature on the machine clamp turning tool; the probe of the infrared temperature sensor 201 can be aligned with the blade 303 of the machine clamp turning tool 300 by adjusting the angle between the horizontal bracket and the longitudinal bracket and adjusting the position of the infrared temperature sensor 201 in the long hole of the horizontal bracket.

[0086] The four Hall sensors in the upper tool body signal transmitting disk 111 are connected to the controller via wired means to sense the current working position of the electric tool holder; the signals of the acceleration sensor 212 in the signal acquisition cover 200, the infrared temperature sensor 201, and the gasket-shaped temperature sensor 304 on the machine-clamped turning tool 300 are transmitted to the wireless sensor 210 via wired means, and the wireless sensor 210 sends the above signals to the controller via wireless means.

[0087] A through hole is provided on the concave platform of the upper tool body 105 to facilitate the wiring of the temperature sensor on the machine-clamped turning tool.

[0088] In this embodiment, refer to Figure 6 The wireless sensor 210 is fixed in the upper drawer 211 by screws; the acceleration sensor 212 is fixed in the middle drawer 213 by screws; and the wireless charging receiving module 215 is fixed in the lower drawer 216 by screws.

[0089] The outer aluminum cover 207 and the inner aluminum cover 217 of the signal collection cover 200 are both provided with fixing seats at the bottom, and fixing holes are evenly opened around the fixing seats. After screws pass through the fixing holes, they are fixed to the upper blade 105 of the blade holder body. The outer aluminum cover 207 has a waterproof and dustproof effect.

[0090] Symmetrical wiring holes are provided on the outer side of the upper end of the inner aluminum cover 217, and downward curved wiring tubes 208 are symmetrically provided on the outer side of the upper end of the outer aluminum cover 207, which are used for power supply and signal wiring of the infrared temperature sensor 201 on the fixed bracket 204 and the gasket-shaped temperature sensor 304 on the machine clamp turning tool 300. The wireless charging receiving module 215 in the inner aluminum cover 217 supplies power to the acceleration sensor 212, the wireless sensor 210, the infrared temperature sensor 201, and the gasket-shaped temperature sensor 304. The data collected by the acceleration sensor 212, the infrared temperature sensor 201, and the gasket-shaped temperature sensor 304 are sent out through the wireless sensor 210 in the inner aluminum cover 217. The opening of the wiring tube 208 faces downward, which can better play a role in waterproofing and dustproofing.

[0091] The bottoms of the upper drawer 211 , the middle drawer 213 and the lower drawer 216 are all hollowed out to facilitate wiring; further, the wireless charging receiving module 215 is placed in the lower drawer 216 .

[0092] The machine-clamped turning tool 300 adopts a gasket-shaped temperature sensor 304 to replace the traditional gasket on the machine-clamped turning tool 300, so that the temperature of the machine-clamped turning tool blade can be more accurately sensed, thereby improving the monitoring effect.

[0093] The working principle of tool change of tool holder body is as follows:

[0094] After the tool change command is issued, the motor rotates forward, and the rotation is transmitted through the worm-worm wheel-screw, and the screw rotates clockwise.

[0095] The internal thread at the center of the upper cutter body cooperates with the screw. When the screw rotates, the upper cutter body has two forms of movement: synchronous rotation with the screw, rising or falling, depending on whether the freedom of the upper cutter body in the circumferential direction is restricted.

[0096] At the initial position, the upper and lower cutter body gear disks are in meshing state, which limits the circumferential rotational freedom of the upper cutter body. Therefore, the upper cutter body begins to rise along the external thread of the screw. When the upper and lower cutter body disks are completely disengaged, the upper cutter body will rotate synchronously with the screw.

[0097] At the same time, the upper clutch plate at the top of the worm drives the two clutch pins to rotate clockwise synchronously with the upper cutter body. The clutch pins slide clockwise on the upper surface of the lower clutch plate. Every time they slide a quarter of a circle, they fall into the right-angled trapezoidal groove of the lower clutch plate and slide out of the groove along the slope.

[0098] When the upper tool body rotates to the target tool position (at this time, the lower end of the clutch pin is located in the groove of the lower clutch disk, and the magnet in the cover seat rotates to the Hall sensor corresponding to the target tool position on the transmitting disk), the Hall sensor of the target tool position on the transmitting disk sends a tool position signal to the controller, and the controller controls the motor to stop forward rotation and start reverse rotation.

[0099] Due to inertia, the screw, upper cutter body, upper clutch plate, and clutch pin first decelerate to zero. At this time, the clutch pin has slid out of the target cutter position along the slope of the clutch plate groove corresponding to the lower clutch plate groove. Then the screw, upper cutter body, upper clutch plate, and clutch pin begin to rotate synchronously counterclockwise. When the clutch pin returns counterclockwise to the lower clutch plate groove corresponding to the lower target cutter position, the counterclockwise slope of the groove is a right-angle slope, which limits the counterclockwise rotation of the clutch pin, that is, the circumferential rotation freedom of the screw is limited. However, the upper cutter body still has the inertia of counterclockwise rotation, so the upper cutter body begins to descend along the external thread of the screw, and the end face teeth of the upper cutter body and the end face teeth of the lower cutter body are meshed to complete the precise positioning and locking. At this time, the motor stops reversing and the tool change is completed.

[0100] The wireless sensor may be a wireless sensor based on ZigBee, Wifi or Bluetooth technology;

[0101] The acceleration sensor uses a piezoelectric three-axis acceleration sensor with a range of 5g;

[0102] The wireless charging module consists of a wireless charging transmitter module and a wireless charging receiver module. The input voltage of the wireless charging transmitter module is DC 24V, and the output voltage of the wireless charging receiver module is DC 24V.

[0103] The infrared temperature sensor has a range of 0-800°C;

[0104] The measuring range of the gasket-shaped temperature sensor on the machine clamp turning tool is 0-800℃.

[0105] The controller comprises a PLC controller, a touch screen, a wireless sensor, an audible and optic alarm and a peripheral circuit; the PLC controller is respectively connected with the touch screen, the wireless sensor, the audible and optic alarm and an intermediate relay.

[0106] The PLC controller is the core of the electric tool holder controller, which has tool changing program and temperature and acceleration data acquisition and processing program set inside.

[0107] The touch screen is connected to the PLC controller via a network cable, and functions such as setting temperature and acceleration thresholds, automatic or electric tool change control, and query of vibration acceleration historical data can be performed through the touch screen;

[0108] The wireless sensor is used to wirelessly receive the temperature and acceleration information of the machine-clamped turning tool on the tool holder body, and send the information to the PLC controller in a wired manner.

[0109] The sound and light alarm is used to display the working status of the tool holder. It displays green when working normally; it displays yellow and flashes when the temperature or acceleration exceeds the first threshold; it displays red and flashes and beeps when the temperature or acceleration exceeds the second threshold;

[0110] The peripheral circuit is composed of leakage protection switch, fuse, contactor, intermediate relay, transformer, DC power supply, terminal block, cable, etc., which is used for power supply and output control of PLC.

[0111] The controller is used to control the working method of the electric tool holder as follows:

[0112] 1. Automatic tool selection;

[0113] 1-1) Select the button corresponding to the required tool position on the touch screen, and the touch screen will send the information to the PLC controller;

[0114] 1-2) The PLC controller analyzes the signals from each Hall sensor to determine whether the target tool position is the current tool position of the electric tool holder. If it is the current tool position, no action will be taken; if it is not the current tool position, the process will proceed to step 1-3);

[0115] 1-3) The intermediate relay corresponding to the forward rotation of the drive motor is energized. After the intermediate relay is energized, the forward rotation AC contactor coil of the drive motor is energized, the forward rotation three-phase power supply is turned on, the motor starts to rotate forward, and the knife body on the knife holder body starts to rotate clockwise;

[0116] When the target tool position is reached, the Hall sensor on the signal transmission disk sends a signal to the PLC controller, which controls the motor to reverse, so that the gear discs of the upper and lower tool bodies engage and lock at the selected tool position. The PLC controls the motor to reverse, the reverse power supply is cut off, and the automatic tool change is completed.

[0117] 2. Select the knife by clicking;

[0118] Press the inching tool selection button on the touch screen, and the PLC controller controls the tool body on the electric tool holder to rotate 90 degrees clockwise, that is, one tool position is changed clockwise, and the inching tool change is completed. Each time the inching button is pressed, the tool holder changes one tool position clockwise.

[0119] 3. Threshold setting;

[0120] Temperature threshold 1, temperature threshold 2, acceleration threshold 1 and acceleration threshold 2 are set on the touch screen. The set thresholds have the functions of automatic storage and power-off saving; the sound and light alarm displays the working status of the tool holder. When the tool holder works normally, the light alarm displays green; when the temperature or acceleration exceeds the first threshold, the sound and light alarm displays yellow and flashes; when the temperature or acceleration exceeds the second threshold, the sound and light alarm displays red and flashes, beeps, and at the same time cuts off the machine tool control system and spindle power.

[0121] 4. Machine tool control system and spindle power control;

[0122] The machine control system / spindle control power supply can be directly controlled by the switch button on the touch screen.

[0123] 5. Historical data query;

[0124] On the touch screen, you can choose to query the historical data of temperature and acceleration and generate a trend chart.

[0125] Reference Fig.11 , the electrical schematic diagram of the main circuit of the electric tool rest of the present invention; the three-phase AC is connected to the leakage protection switch, and the leakage protection switch is connected to the fuse; after coming out of the fuse, it is divided into four routes, namely contactor KM1 (three-phase asynchronous motor forward rotation), contactor KM2 (three-phase asynchronous motor reverse rotation), contactor KM3 (spindle and machine tool control system power supply) and transformer TC (converting 380V AC into 110v AC to supply contactor coils and switch power supplies). After the three-phase power comes out of contactors KM1 and KM2, it is connected to the U, V, and W phases of the motor (contactor KM2 realizes motor reversal by phase change). The 110V low-voltage side of the transformer is connected to the normally open contacts of three pairs of intermediate relays, the normally open contacts of intermediate relays KA1 and KA2 are respectively connected to the coils of contactor KM1 and contactor KM2, and the normally open contacts of intermediate relay KA3 are connected to the coil of contactor KM3.

[0126] Reference Fig.12 , the electrical schematic diagram of the electric tool rest control circuit of the present invention; the wiring of the I / O switch input signal in the PLC is: L+ connects to DC24V+, M connects to DC24V-. The "+" of the signal board is connected to DC24V+, and the "-" is connected to DC24V-. The Hall element adopts the NPN wiring method, and the four Hall sensor signal lines are connected to I0.0; I0.1; I0.2 and I0.3 of the PLC, corresponding to the tool position number one by one. The 1M of the PLC is connected to DC24V+.

[0127] The wiring of the two analog quantities in the PLC is as follows: the two analog outputs of the wireless sensor (receiving end) are temperature information and vibration information, which are connected to the two analog inputs of the PLC respectively.

[0128] The output signal wiring in the PLC is as follows: the PLC output controls the coils of the two intermediate relays KA1 and KA2, and further controls the forward and reverse rotation of the motor through the two contactors KM1 and KM2. The PLC output controls the coil of the third intermediate relay KA3, and further controls the power supply of the spindle and machine tool system through the third contactor KM3.

[0129] Reference Fig.13 , the automatic tool selection flow chart of the present invention;

[0130] When the program starts, select the tool position number on the touch screen and press the corresponding button. The automatic tool selection program will automatically compare the current tool position through the Hall element. If the current tool position is consistent with the target tool position, the program will end directly. When the target tool position is inconsistent with the current tool position, the program will execute the motor forward. Each time a tool position is rotated, the program will perform a comparison until the current tool position is consistent with the target tool position. Then the PLC stops the motor forward and executes the motor reverse. After a delay of 800ms, the program stops.

[0131] Reference Fig.14 , a flow chart of the tool selection program of the tool holder of the present invention;

[0132] In the jog tool selection control program, press the jog button to first execute the motor forward rotation, and at the same time the program loop searches for the next Hall sensor signal; if no Hall sensor signal is received, the motor continues to rotate forward; if a Hall sensor signal is received, the motor stops rotating forward and executes reverse rotation and ends the program after a delay of 800ms.

[0133] Reference Fig.15 , the sensor monitoring information control flow chart of the present invention;

[0134] When the temperature sensor is input to the PLC, it is a 0-10V voltage signal, and the PLC will convert the voltage signal into a value within the range of 0-27648. When programming, you need to multiply the digital signal of 0-27648 by the maximum value of the temperature sensor / 27648 = the measured value. When the tool holder is working normally, the light alarm will display green; when the temperature or acceleration exceeds the first threshold, the sound and light alarm will display yellow and flash; when the temperature or acceleration exceeds the second threshold, the sound and light alarm will display red and flash, beep, and cut off the machine control system and spindle power supply.

Claims

1. A multifunctional electric tool holder, characterized in that: It includes a tool holder body, a machine clamp turning tool, a signal collection cover and a controller; the controller is independently set, and the controller adopts a PLC controller; The tool holder body includes a motor, a coupling, a lower tool body, a middle shaft, an upper tool body, a worm, a bearing, a worm wheel, a screw, a lower clutch plate, a clutch pin, an upper clutch plate, a thrust ball bearing, a stop ring, a signal plate and a cover seat; The coupling is a card sleeve structure, connecting the motor rotor and the worm; Two bearings are respectively assembled in the lower cutter body and located at both ends of the worm; The lower cutter body is a rectangular parallelepiped structure, and the upper surface is provided with end face teeth; The middle shaft is fixed on the lower cutter body, the upper part of the middle shaft is a hollow round tube, and the top of the round tube is provided with an external thread; the lower part of the middle shaft is a disc, and there is a positioning step on the disc for assembly and positioning with the lower cutter body; a worm wheel, a screw, an upper clutch disc, a thrust ball bearing, a stop ring and a signal disc are coaxially installed on the middle shaft; the worm wheel is concentrically installed on the upper surface of the disc at the lower part of the middle shaft, and the screw and the worm wheel are matched through a keyway; the upper clutch disc and the screw are matched through two positioning pins, and when the motor drives the screw to rotate, the worm wheel, the screw and the upper clutch disc keep rotating synchronously; the thrust ball bearing, the stop ring and the signal disc are installed in sequence above the upper clutch disc and are fastened by nuts; The upper cutter body is a rectangular parallelepiped structure, with a concave platform along the four outer walls for placing the machine-clamped turning tool. The screw passes through the upper surface of the upper cutter body to fasten the machine-clamped turning tool in the concave platform; a through hole with an internal thread is provided in the middle of the upper cutter body, and the internal thread matches the external thread on the screw rod; the lower surface of the upper cutter body is provided with end face teeth, which mesh with the end face teeth on the upper surface of the lower cutter body; An upper clutch plate through hole is provided in the middle of the upper clutch plate, and the diameter of the upper clutch plate through hole is larger than the diameter of the middle shaft tube; the upper clutch plate is fixed to the upper end of the screw by a positioning pin, and the upper clutch plate rotates synchronously with the screw; the lower surface of the upper clutch plate has a radial groove penetrating the center of the circle, and the top ends of the two clutch pins are respectively limited in the grooves on both sides of the center of the upper clutch plate; A through hole is provided in the middle of the lower clutch disc, and the diameter of the through hole is larger than the diameter of the screw rod; the lower clutch disc is sleeved on the screw rod and fixed on the lower cutter body by screws; there are four radial grooves on the upper surface of the lower clutch disc, which are 90 degrees apart from each other on the circumference, and the cross section of the grooves is in the shape of a right-angle trapezoid, and the two angles at the bottom of the grooves are 90 degrees and 145 degrees respectively in the clockwise direction, that is, a right-angle slope and an inclined slope are formed; The upper end of the clutch pin is arranged in a groove on the lower surface of the upper clutch disc, and the lower end of the clutch pin is in direct contact with the upper surface of the lower clutch disc; The thrust ball bearing is mounted on the middle shaft and located on the upper surface of the upper clutch plate; The stop ring is installed on the upper surface of the thrust ball bearing and is fixed in position by a wedge key placed in the keyway of the center shaft. The stop ring is fastened by a stop ring fastening nut. The function of the stop ring is to limit the upward movement of the upper clutch plate. The signal plate positioning gear ring is installed on the central shaft, located above the retaining ring fastening nut, and is positioned by the positioning key on the inner side of the signal plate positioning gear ring and the positioning keyway of the central shaft; and is fixed to the central shaft by the signal plate fastening nut; The signal plate is positioned by the inner teeth and the outer teeth of the signal plate positioning gear ring. Four Hall sensors are evenly distributed in the inner circumference of the signal plate, corresponding to four tool positions respectively. The cover seat is fixed to the top of the upper cutter body by screws. A magnet is installed in the inner groove of the cover seat. When the upper cutter body rotates, the magnet approaches each Hall sensor on the signal transmission disk, and the Hall sensor sends a signal to obtain the position of the cutter holder. The machine-clamped turning tool comprises a tool body, a fixing block, a blade and a gasket-shaped temperature sensor; the blade and the gasket-shaped temperature sensor are provided with assembly holes of the same diameter; a fixing block is provided on the upper part of the tool body, and one end of the fixing block is fixed to the tool body by a screw; the screw passes through the positioning hole at the other end of the fixing block, the gasket-shaped temperature sensor and the assembly hole on the blade in sequence, and the blade and the gasket-shaped temperature sensor are fastened to the tool body; a first through hole is provided at the front and rear of the tool body, located at the rear center position of the gasket-shaped temperature sensor to the rear end face of the tool body, and a second through hole is provided on the upper surface of the tool body, and the second through hole is vertically connected to the first through hole, and is used for routing the gasket-shaped temperature sensor; the machine-clamped turning tool is clamped on the concave platform in the upper tool body of the tool holder body by screws; The tool holder body can simultaneously clamp 4 machine-clamped turning tools, corresponding to four tool positions; The signal acquisition cover is assembled on the tool holder body, and the information acquisition cover is used to collect the temperature and vibration information of the machine clamp turning tool blade; the signal acquisition cover includes an electromagnetic shielding layer, a wireless charging transmitting module, a wireless charging receiving module, an inner aluminum cover, an outer aluminum cover, a fixing bracket, an acceleration sensor, a wireless sensor and an infrared temperature sensor; The inner aluminum cover is hollow and has three layers of drawers, which are the upper drawer, the middle drawer and the lower drawer from top to bottom. The upper drawer is equipped with a wireless sensor, which sends the collected temperature and acceleration information to an independently set controller wirelessly. An acceleration sensor is placed in the middle drawer to collect the vibration information of the cutter body; The lower drawer is equipped with a wireless charging receiving module to provide power to the acceleration sensor, wireless sensor, infrared temperature sensor, and temperature sensor on the machine clamp turning tool; A wireless charging transmitter module and an electromagnetic shielding layer are provided directly below the wireless charging receiving module and are threadedly connected to the central axis of the tool holder body; the power supply of the wireless charging transmitter module is connected through the through hole of the central axis; the electromagnetic shielding layer is installed on the boss at the upper end of the central axis, and the wireless charging transmitter module is fixed by matching the internal thread with the external thread at the top end of the central axis; The end face diameter of the outer aluminum cover is larger than that of the inner aluminum cover, and the outer aluminum cover is fitted on the inner aluminum cover; a fixed bracket is arranged above the outer aluminum cover, and the fixed bracket is in an I-shape, with two parallel horizontal brackets at both ends, and the two ends of the vertical bracket are respectively connected to the horizontal bracket by screws, and two screw holes are opened in the middle of the vertical bracket, and the fixed bracket is installed on the upper part of the outer aluminum cover by screws; there are long holes at both ends of the horizontal bracket, and it is fixed to the horizontal bracket by upper and lower nuts cooperating with the external threads on the infrared temperature sensor; the fixed bracket on the outer aluminum cover also has the function of the wireless sensor antenna in the inner aluminum cover; the infrared temperature sensor is used for non-contact monitoring of the blade temperature on the machine clamp turning tool.

2. The multifunctional electric tool holder according to claim 1, characterized in that: The four Hall sensors in the upper tool body signal transmitting disk are connected to the controller by wired means to sense the current working position of the electric tool holder; the acceleration sensor, infrared temperature sensor and temperature sensor signals on the machine clamp turning tool in the signal acquisition cover are transmitted to the wireless sensor by wired means, and the wireless sensor sends the above signals to the controller by wireless means.

3. The multifunctional electric tool holder according to claim 1, characterized in that: There is a distance of 1 mm between the electromagnetic shielding layer and the upper end of the magnetic base of the tool holder body to prevent friction when the tool holder rotates.

4. The multifunctional electric tool holder according to claim 1, characterized in that: By adjusting the angle between the transverse bracket and the longitudinal bracket and adjusting the position of the infrared temperature sensor in the long hole of the transverse bracket, the probe of the infrared temperature sensor is aligned with the blade of the machine clamp turning tool.

5. The multifunctional electric tool holder according to claim 1, characterized in that: A through hole is opened on the concave platform of the upper tool body to facilitate the wiring of the temperature sensor on the machine clamp turning tool.

6. The multifunctional electric tool holder according to claim 1, characterized in that: The wireless sensor is fixed in the upper drawer of the inner aluminum cover by screws; the acceleration sensor is fixed in the middle drawer of the inner aluminum cover by screws; and the wireless charging receiving module is fixed in the lower drawer of the inner aluminum cover by screws.

7. The multifunctional electric tool holder according to claim 1, characterized in that: A fixing seat is provided at the bottom of the outer aluminum cover and the inner aluminum cover of the signal acquisition cover, and fixing holes are evenly opened around the fixing seat. After screws pass through the fixing holes, they are fixed to the upper blade of the blade holder body; the outer aluminum cover has waterproof and dustproof functions.

8. The multifunctional electric tool holder according to claim 1, characterized in that: Symmetrical wiring holes are provided on the outer side of the upper end of the inner aluminum cover, and downwardly bent wiring tubes are symmetrically provided on the outer side of the upper end of the outer aluminum cover, which are used to fix the power supply and signal wiring of the infrared temperature sensor on the bracket and the gasket-shaped temperature sensor on the machine clamp turning tool; the opening of the wiring tube faces downward, which can prevent water and dust.

9. The multifunctional electric tool holder according to claim 1, characterized in that: The bottoms of the upper drawer, the middle drawer and the lower drawer are all hollowed out.

10. The multifunctional electric tool holder according to claim 1, characterized in that: The motor is a three-phase AC asynchronous motor.

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