A machine tool with electric clamping system

Abstract

The present invention provides a machine tool with an electric clamping system, comprising a driving motor assembly, a rotary force transmitter, a machine tool body and a chuck, the machine tool body comprising a pull rod and a spindle, the rotary force transmitter is connected to the pull rod of the machine tool body, the pull rod is used to drive the clamping jaws of the chuck to open and close, the driving motor assembly and the rotary force transmitter can be transmission-connected or disengaged, and the rotary force transmitter and the spindle of the machine tool body can be transmission-connected or disengaged; when it is necessary to clamp or loosen the workpiece, the driving motor assembly and the rotary force transmitter are transmission-connected, and the rotary force transmitter and the spindle of the machine tool body are disengaged from the transmission connection, at which time the driving motor assembly can drive the pull rod to move forward and backward along the axial direction through the rotary force transmitter, so that the clamping jaws of the chuck are opened and closed; when it is necessary to process the workpiece, the driving motor assembly and the rotary force transmitter are disengaged from the transmission connection, and the rotary force transmitter is transmission-connected to the spindle of the machine tool body, and when the spindle of the machine tool body rotates, the clamping jaws of the chuck are driven to rotate.

Description

Technical Field

[0001] The invention relates to the technical field of machine tool processing, in particular to a machine tool with an electric clamping system. Background Art

[0002] A chuck is a mechanical device used to clamp workpieces on machine tools. It is a machine tool accessory that uses the radial movement of the movable jaws evenly distributed on the chuck body to clamp and position the workpiece. A chuck generally consists of three parts: a chuck body, movable jaws, and a jaw drive motor assembly. The chuck body has a minimum diameter of 65 mm and a maximum of 1500 mm. There is a through hole in the center to allow the workpiece or bar to pass through; the back has a cylindrical or short conical structure, which is connected to the end of the machine tool spindle directly or through a flange. Chucks are usually installed on lathes, external cylindrical grinders, and internal cylindrical grinders. They can also be used in conjunction with various indexing devices for milling machines and drilling machines. The existing mainstream chucks can be divided into manual chucks, pneumatic chucks, and hydraulic chucks based on the power used.

[0003] The existing clamping system has a structure that uses a hydraulic station and a high-pressure cylinder. Although it has been used for a long time and the technology is relatively mature, during production and use, the motor needs to compress the hydraulic oil to form high pressure and then push the chuck to clamp the workpiece. In this energy conversion process, the energy consumption is large, the cost is high, and if the hydraulic oil leaks, the impact on the environment is also large.

[0004] Patent document 202311065478.8 provides an electric chuck, in whose structure the rotating force transmission part is a separate component fixedly mounted on the spindle mounting seat. During the workpiece clamping process, the relative position remains stationary at all times, and only the high-speed rotation of the output end bearing matches the rotation of the machine tool spindle. Therefore, the large axial push and pull forces generated when clamping the workpiece act on the output end bearing, causing the bearing to heat up, wear or get stuck. Summary of the invention

[0005] Based on this, it is necessary to provide a machine tool with a more stable and better electric clamping system.

[0006] The present invention provides a machine tool with an electric clamping system, comprising a driving motor assembly, a rotary force transmitter, a machine tool body and a chuck, wherein the machine tool body comprises a pull rod and a spindle, the rotary force transmitter is connected to the pull rod of the machine tool body, the pull rod is used to drive the opening and closing of the clamping jaws of the chuck, the driving motor assembly and the rotary force transmitter can be connected or disconnected in transmission, and the rotary force transmitter and the spindle of the machine tool body can be connected or disconnected in transmission;

[0007] When it is necessary to clamp or loosen the workpiece, the drive motor assembly is connected to the rotary force transmitter, and the rotary force transmitter is disconnected from the main shaft of the machine tool body. At this time, the drive motor assembly can drive the pull rod to move forward and backward along the axial direction through the rotary force transmitter, so that the clamping jaws of the chuck open and close;

[0008] When it is necessary to process the workpiece, the driving motor assembly and the rotary force transmitter are disconnected from the transmission connection, and the rotary force transmitter is connected to the main shaft of the machine tool body. When the main shaft of the machine tool body rotates, the clamping jaws of the chuck are driven to rotate.

[0009] Preferably, the drive motor assembly and the rotary force transmitter are connected or disconnected via a first clutch mechanism, and the rotary force transmitter and the main shaft of the machine tool body are connected or disconnected via a second clutch mechanism.

[0010] Preferably, the first clutch mechanism and the second clutch mechanism both include a magnetic seat and a clutch member that can be connected or separated from each other, and the connection or separation of the clutch member is controlled by energizing or de-energizing the magnetic seat.

[0011] Preferably, the rotary force transmitter comprises a mounting plate and a screw rod, the screw rod passes through the mounting plate, and the magnetic seats are respectively fixed to two sides of the mounting plate and do not move with the rotary force transmitter.

[0012] Preferably, the first clutch mechanism is installed at the input end of the rotary force transmitter, and the second clutch mechanism is installed at the middle part of the input end of the rotary force transmitter.

[0013] Preferably, the rotary force transmitter includes a screw, and the drive motor assembly and the screw can be transmission-connected or disengaged through a first clutch mechanism, the first clutch mechanism includes a first clutch plate, a first rotating seat and a first magnetic seat, the first clutch plate is fixed to the drive motor assembly, the first rotating seat is mounted on the screw of the rotary force transmitter and can rotate with the screw, the first magnetic seat can make the first clutch plate and the first rotating seat engage, so that the drive motor assembly and the screw are transmission-connected.

[0014] Preferably, after the first clutch plate is disconnected from the first rotating seat, a distance of 0.1-1 mm is provided between the first clutch plate and the first rotating seat.

[0015] Preferably, the rotary force transmitter and the main shaft of the machine tool body are connected or disconnected through a second clutch mechanism, the second clutch mechanism includes a second clutch plate, a second rotating seat and a second magnetic seat, the second clutch plate is connected to the main shaft of the machine tool body through a flange, the second rotating seat is mounted on the screw rod of the rotary force transmitter and can rotate with the screw rod, when the second magnetic seat is powered on or off, the second clutch plate and the second rotating seat are attracted to make the rotary force transmitter and the main shaft of the machine tool body connected through transmission.

[0016] Preferably, after the second clutch plate is disconnected from the second rotating seat, a distance of 0.1-1 mm is provided between the second clutch plate and the second rotating seat.

[0017] Preferably, the machine tool body comprises a pulley and a pulley flange fixedly connected to the machine tool spindle, and the pulley flange is used for installing the rotary force transmitter.

[0018] The main parts of the machine tool with an electric clamping system provided by the present invention can rotate with the main shaft, and the axial force generated when the push / pull action occurs will be directly applied to the main shaft of the machine tool instead of being carried by the bearing, so the structure has higher reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other purposes, features and advantages of the present invention will become more clear by more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0020] Figure 1 A schematic diagram of the structure of a machine tool with an electric clamping system provided by the present invention;

[0021] Figure 2 A schematic cross-sectional structure diagram of a machine tool with an electric clamping system provided by the present invention;

[0022] Figure 3 for Figure 2 A schematic diagram of the structure enlargement of part A;

[0023] Figure 4 A schematic diagram of the structure of the rotary force transmitter provided for the invention;

[0024] Figure 5 for Figure 4 A schematic diagram of the structure of part B in the middle is enlarged;

[0025] Figure 6 for Figure 4 Schematic diagram of the enlarged structure of part C in the middle. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings.

[0027] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art. The terms used in the specification herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] refer to Figure 1-6 The present invention provides a machine tool with an electric clamping system, including a driving motor assembly 1, a rotary force transmitter 2, a machine tool body 4 and a chuck (not shown). The chuck structure can refer to Patent No. 202311065478.8. The machine tool body 4 includes a pull rod 42 and a spindle 41. The rotary force transmitter 2 is connected to the pull rod 42 of the machine tool body 4. The pull rod 42 is used to drive the opening and closing of the clamping jaws of the chuck. The driving motor assembly 1 and the rotary force transmitter 2 can be connected or disconnected through a first clutch mechanism, and the rotary force transmitter 2 and the spindle 41 of the machine tool body 4 can be connected or disconnected through a second clutch mechanism.

[0030] When it is necessary to clamp or loosen the workpiece, the first clutch mechanism connects the drive motor assembly 1 and the rotary force transmitter 2, and the rotary force transmitter 2 and the spindle 41 of the machine tool body 4 are disengaged from the transmission connection. At this time, the drive motor assembly 1 can drive the pull rod 42 to move axially back and forth through the rotary force transmitter 2, so that the clamping jaws of the chuck open and close; at this time, the rotation of the machine tool spindle 41 will not affect the rotary force transmitter 2, thereby avoiding the problem of cable winding when the machine tool spindle 41 rotates at high speed.

[0031] When the workpiece is clamped and needs to be processed in the next step, the driving motor assembly 1 and the rotary force transmitter 2 are disconnected from the transmission connection, and the driving force of the driving motor assembly 1 will not be transmitted to the rotary force transmitter 2, so as to avoid the pull rod 42 being pulled to cause the jaws to open. At this time, the rotary force transmitter 2 and the main shaft 41 of the machine tool body 4 are connected in transmission, so that the rotary force transmitter 2 and the machine tool body 4 are combined into one, and the rotary force transmitter 2 rotates at a high speed closely with the main shaft 41 of the machine tool to ensure that the rotary force transmitter 2 will not loosen, so as to avoid the rotary force transmitter 2 loosening to cause the pull rod 42 to pull and cause the jaws to open.

[0032] The machine tool with the electric clamping system provided in this embodiment is simpler, more reliable, and more environmentally friendly. The first clutch mechanism and the second clutch mechanism ensure that the clamping process and the rotation process of the machine tool spindle 41 can be separated. When the push / pull action occurs, the axial force generated will directly act on the machine tool spindle 41 instead of being carried by the bearing, so that the structure of this embodiment has higher reliability.

[0033] refer to Figure 4 The rotary force transmitter 2 includes a first clutch mechanism, a second clutch mechanism, a screw 21, a screw nut 22, a pull rod connecting shaft 23, a first mounting plate 24, a second mounting plate 25, a support plate 26, a first flange fixing bolt 27, a first flange 28, a bearing mounting seat 31, a bearing 311, a bearing surface flange 32, and a protective plate 33.

[0034] The screw rod 21 is installed at the center of the rotary force transmitter 2 through the bearing 311, and as the power input shaft, it can rotate synchronously with the reducer to provide push / pull force.

[0035] The screw nut 22 is matched with the screw 21. When the screw 21 rotates, the screw nut 22 can translate forward and backward. The two cooperate to convert the rotation into linear motion. One end of the screw nut 22 is provided with an external thread for installing the pull rod connecting shaft 23. The screw nut mounting sleeve 221 is fixedly mounted on the bearing mounting seat 31, which is used to radially position the screw nut to prevent the screw nut from rotating with the screw, but can slide axially. The end face of the screw is installed with a limit block 222, which is used to limit the screw nut and prevent it from sliding out due to over-travel.

[0036] The pull rod connecting shaft 23 is connected to the lead screw nut at one end and connected to the pull rod 42 in the machine tool spindle 41 at the other end by means of threads, so as to transmit push / pull force.

[0037] The first mounting plate 24 is used to mount the reducer; it is fixedly connected to the mounting seat of the machine tool spindle 41 through the mounting rod 29 and the nut 30. The support plate 26 is used to fix the first mounting plate 24 and the second mounting plate 25. The first flange fixing bolts 27 are mounted on the first flange 28, which can be set to multiple or single. The first flange 28 is fixed to the output shaft of the reducer and can rotate with the reducer. The mounting rod and the nut fix the second mounting plate 25 to the machine tool body 4.

[0038] The bearing mounting seat 31 is sleeved on the side of the screw input end and fixed on the pulley flange by bolts, and the interior thereof is used to install the positioning bearing 311. The bearing 311 is installed in the bearing mounting seat 31 and sleeved on the screw input end to ensure smooth rotation of the screw and to withstand the axial tension when the tooling is clamped or loosened. The end face thrust ball bearing 311 used in this embodiment can also be used with other bearings 311 such as spherical roller bearings 311. The bearing surface flange 32 is fixed on the bearing mounting seat 31 by bolts, and can compress the positioning bearing 311. The protective plate 33 cooperates with the support plate 26 to form a protective cover to prevent foreign objects from falling into the interior.

[0039] The first clutch mechanism and the second clutch mechanism may adopt electromagnetic clutch or mechanical clutch.

[0040] refer to Figure 4-6 In a further preferred embodiment, the first clutch mechanism and the second clutch mechanism both include a magnetic seat and a clutch member that can be connected or separated from each other. The magnetic seat of the first clutch mechanism is called a first magnetic seat 341, and the magnetic seat of the second clutch mechanism is called a second magnetic seat 342. The connection or separation of the clutch member is controlled by energizing or de-energizing the magnetic seat. There is an energized electromagnetic coil in the magnetic seat, which can control whether there is magnetic attraction when it is energized or not.

[0041] In a preferred embodiment, the first clutch mechanism and the second clutch mechanism may adopt a normally open structure or a normally closed structure. In the normally open structure, the magnetic base is energized to connect the clutch components, and the clutch components are separated when the power is not supplied; in the normally closed structure, the magnetic base is energized to separate the clutch components, and the clutch components are connected when the power is not supplied.

[0042] If a normally closed structure is used, the consumption of electric energy can be reduced, the stability of clamping during processing can be improved, and it can ensure that the workpiece is still effectively clamped and does not loosen or fall off in the event of a sudden power outage during the workpiece clamping and rotation process.

[0043] refer to Figure 4 In a preferred embodiment, the magnetic seats of the first clutch mechanism and the second clutch mechanism are respectively fixed on both sides of the second mounting plate 25 and do not move with the screw rod 21 of the rotary force transmitter 2.

[0044] refer to Figure 4-5In a preferred embodiment, the clutch member of the first clutch mechanism specifically includes a first clutch plate 351 and a first rotating seat 361. The first clutch plate 351 is fixed on the drive motor assembly 1. The first rotating seat 361 is mounted on the screw 21 of the rotary force transmitter 2 and can rotate with the screw 21. The first magnetic seat 341 can control the first clutch plate 351 to engage with the first rotating seat 361, so that the drive motor assembly 1 and the screw 21 are connected in transmission. Specifically, the first clutch plate 351 is fixedly mounted on the first flange 28 and is made of a material with good magnetic conductivity. After the first clutch plate 351 is disconnected from the first rotating seat 361, there is a spacing of 0.1-1mm between the first clutch plate 351 and the first rotating seat 361, further a spacing of 0.2-0.4mm, and further a spacing of 0.3mm, and they are not connected to each other.

[0045] The first rotating seat 361 is fixedly mounted on one end of the input shaft of the screw 21 through a key, and the kinetic energy (torque) transmitted through the first clutch plate 351 can be applied to the screw 21 to drive the screw to rotate. Under the action of the magnetic seat, the first clutch plate 351 can be slightly deformed to fit with the end surface of the first rotating seat, and the kinetic energy (torque) output by the reducer is transmitted to the first rotating seat 361 through the combined action of magnetic attraction and friction.

[0046] The specific working principle of the first clutch mechanism (taking the normally open structure as an example) is as follows:

[0047] refer to Figure 4 and Figure 6 , the first clutch mechanism is installed at the power (torque) input end of the rotary force transmitter 2, and the first flange 28 is fixedly connected to the first clutch plate 351 as a whole and fixedly installed on the output shaft of the reducer. The first rotating seat 361 is fixedly mounted on the input end of the screw to ensure that the two can rotate synchronously, and a 0.3mm gap is set between the end face of the first rotating seat 361 and the end face of the first clutch plate 351. The first electromagnetic magnetic seat is fixedly mounted on the second mounting plate 25 and cannot rotate, so it will not rotate with the screw of the rotary force transmitter 2. When the first electromagnetic magnetic seat is energized to generate electromagnetic attraction, the end face of the first rotating seat 361 and the end face of the first clutch plate 351 are attracted to each other (the gap is 0 at this time) as an integral part. At this time, the power (torque) transmitted by the deceleration can directly act on the screw, drive the screw to rotate, and further drive the screw nut to slide back and forth. When the first electromagnetic magnetic seat is powered off, the magnetic force disappears and the end surface of the first rotating seat 361 and the end surface of the first clutch plate 351 are restored to a distance of 0.3 mm. At this time, the two are independent of each other and their actions do not affect each other.

[0048] In a preferred embodiment, the rotary force transmitter 2 and the main shaft 41 of the machine tool body 4 are connected or disconnected through a second clutch mechanism, and the second clutch mechanism includes a second clutch plate, a second rotating seat 362 and a second magnetic seat 342, the second clutch plate is connected to the main shaft 41 of the machine tool body 4, the second rotating seat 362 is mounted on the screw 21 of the rotary force transmitter 2, and can rotate with the screw 21, when the second magnetic seat 342 is powered on or off, the second clutch plate and the second rotating seat 362 are attracted, so that the rotary force transmitter 2 and the main shaft 41 of the machine tool body 4 are connected. After the second clutch plate is disconnected from the second rotating seat 362, there is a spacing of 0.1-1mm between the second clutch plate and the second rotating seat 362, further a spacing of 0.2-0.4mm, and further a spacing of 0.3mm, which can ensure better connection and disconnection, avoid too large a spacing, which cannot be attracted well, and avoid too small a spacing, which has a poor disengagement effect.

[0049] The second rotating seat 362 is fixedly mounted on the middle side of one end of the screw input shaft by a key, and can transfer the kinetic energy (torque) from the screw to the second clutch plate.

[0050] The second clutch piece 352 is fixedly mounted on the end face flange of the bearing 311 and is made of a material with good magnetic conductivity. When there is no magnetic attraction, it maintains a distance of 0.3mm from the second rotating seat and is not connected to each other. When the second magnetic seat 342 is energized to generate magnetic attraction, the second clutch piece 352 can be slightly deformed and fit with the end face of the second rotating seat 362. Through the combined action of magnetic attraction and friction, the screw rod and the rotary actuator are relatively fixed to the machine tool spindle 41 and temporarily combined into a whole. When the screw rod provides and transmits pulling force to the pull rod 42 to clamp the workpiece and process it, the rotary actuator can rotate together with the machine tool spindle 41 until the processing is completed. When the processing is completed, the second rotating seat and the second clutch piece 352, at this time, the rotary actuator and the machine tool spindle 41 become two relatively movable individuals.

[0051] The specific working principle of the second clutch mechanism is as follows:

[0052] 1. Normally open structure

[0053] The end face flange of the bearing 311 installed at the middle part of the input end of the rotating force transmission pneumatic force (torque) is fixedly connected to the second clutch plate 352 as a whole and installed and fixed on the bearing mounting seat 31. The second rotating seat 362 is fixed to the middle part of the screw input end to ensure that the two can rotate synchronously, and a 0.3mm gap is also set between the end face of the second rotating seat 362 and the end face of the second clutch plate 352. The second magnetic seat 342 is fixedly installed on the second mounting plate 25 and cannot rotate, so it will not rotate with the screw of the rotating force transmitter 2. When the second magnetic seat 342 is energized to generate electromagnetic attraction, the end face of the second rotating seat 362 and the end face of the second clutch plate 352 are attracted to each other (the gap is 0 at this time) to form an integral part. At this time, the rotary transmitter and the machine tool spindle 41 are temporarily connected as a whole, and can rotate synchronously with the rotation of the machine tool spindle 41. When the second magnetic seat 342 is powered off, the magnetic force disappears, and the end face of the second rotating seat 362 and the end face of the second clutch plate 352 return to a spacing of 0.3 mm. At this time, the two are independent of each other and their actions do not affect each other, so that the independent operation of the screw rod in the rotating force transmission part can be achieved when the machine tool spindle 41 is stationary.

[0054] 2. Normally closed structure

[0055] When the workpiece is being processed, the first rotating seat 361 and the first clutch plate 351 in the first clutch mechanism are powered off and separated, and the second rotating seat 362 and the second clutch plate 352 in the second clutch mechanism are powered off and attracted to ensure that the rotating force transmission part and the machine tool spindle 41 are connected as a whole. When the workpiece processing is completed, the first rotating seat 361 and the first clutch plate 351 in the first clutch mechanism are powered on and attracted to, and the second rotating seat 362 and the second clutch plate 352 in the second clutch mechanism are powered on and separated by a distance of 0.3 mm to ensure that the rotating force transmitter 2 and the machine tool spindle 41 are temporarily disconnected and can operate independently.

[0056] refer to Figure 2 The driving motor assembly 1 includes a motor 11 and a reducer 12. The motor provides power for the screw movement of the rotary force transmitter 2; the reducer is fixed on the mounting plate, and the power input by the motor is decelerated and increased in torque before being transmitted to the screw connected thereto, providing power for the rotation of the screw. This embodiment uses a planetary reducer, and other types of reducers can also be used. When the torque requirement is small, such as when the workpiece is fragile or the cutting condition requires a small clamping force, the reduction structure may not be installed, and the motor may be directly connected to the rotary force transmitter 2.

[0057] The machine tool body 4 includes a pulley, a pulley flange, fixing bolts, and a machine tool spindle 41 mounting seat. The pulley is fixedly connected to the machine tool spindle 41 to provide power for the high-speed rotation transmission of the spindle 41; the pulley flange is used to be installed and fixed on the end face of the pulley as a transition mounting part for installing the rotational force transmitter 2, the pulley flange is fixed on the bearing mounting seat 31, the fixing bolts are used to fix the pulley flange to the pulley, and the machine tool spindle 41 mounting seat is used to install and position the machine tool spindle 41.

[0058] The working process of the machine tool with electric clamping system provided in this embodiment is as follows:

[0059] 1. Both the first clutch mechanism and the second clutch mechanism are normally open structures.

[0060] The cycle of material loading, clamping, processing, unloading and secondary loading is as follows:

[0061] When the machine tool is operating normally and the fixture is released to be loaded: keep the first clutch mechanism energized and attracted, and the second clutch mechanism is de-energized and separated---loading (workpiece to be processed)---motor rotation (forward)---reducer rotation---drive the screw rod forward---drive the screw rod nut to slide toward the screw rod input end---drive the pull rod 42 to pull backward---drive the tool to clamp the workpiece---the second clutch mechanism is energized and attracted, and the first clutch mechanism is de-energized and separated---the machine tool spindle 41 rotates at high speed to cooperate with the tool to complete the processing---the machine tool spindle 41 stops and remains stationary---the first clutch mechanism is energized and attracted, and the second clutch mechanism is de-energized and separated---motor rotation (reverse)---reducer rotation---drive the screw rod to reverse---drive the screw rod nut to slide toward the screw rod output end---drive the pull rod 42 to push forward---drive the tool to release the workpiece---the workpiece can be taken out at this time and the workpiece to be processed can be installed and the cycle is repeated;

[0062] 2. The first clutch mechanism is a normally open structure, and the second clutch mechanism is a normally closed structure.

[0063] The cycle process from material loading and clamping, processing completion, material unloading to secondary loading:

[0064] When the machine tool is operating normally and the fixture is released to be loaded: keep the first clutch mechanism energized and attracted, and the second clutch mechanism energized and separated---loading (workpiece to be processed)---motor rotation (forward)---reducer rotation---drive the screw rod forward---drive the screw rod nut to slide toward the screw rod input end---drive the pull rod 42 to pull backward---drive the tool to clamp the workpiece---the second clutch mechanism is de-energized and attracted, and the first clutch mechanism is de-energized and separated---the machine tool spindle 41 rotates at high speed to cooperate with the tool to complete the processing---the machine tool spindle 41 stops and remains stationary---the first clutch mechanism is energized and attracted, and the second clutch mechanism is energized and separated---motor rotation (reverse)---reducer rotation---drive the screw rod to reverse---drive the screw rod nut to slide toward the screw rod output end---drive the pull rod 42 to push forward---drive the tool to release the workpiece---the workpiece can be taken out at this time and the workpiece to be processed can be installed and the cycle is repeated;

[0065] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0067] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A machine tool with an electric clamping system, characterized in that: It includes a driving motor assembly, a rotary force transmitter, a machine tool body and a chuck, wherein the machine tool body includes a pull rod and a spindle, the rotary force transmitter is connected to the pull rod of the machine tool body, the pull rod is used to drive the jaws of the chuck to open and close, the driving motor assembly and the rotary force transmitter are connected or disconnected through a first clutch mechanism, and the rotary force transmitter and the spindle of the machine tool body are connected or disconnected through a second clutch mechanism; When it is necessary to clamp or release the workpiece, the drive motor assembly and the rotary force transmitter are connected by a first clutch mechanism, and the rotary force transmitter and the main shaft of the machine tool body are disconnected by a second clutch mechanism. At this time, the drive motor assembly can drive the pull rod to move forward and backward along the axial direction through the rotary force transmitter to open and close the clamping jaws of the chuck; When it is necessary to process a workpiece, the driving motor assembly and the rotary force transmitter are disengaged from the transmission connection through the first clutch mechanism, and the rotary force transmitter and the main shaft of the machine tool body are connected to each other through the second clutch mechanism. When the main shaft of the machine tool body rotates, the clamping jaws of the chuck are driven to rotate; The rotary force transmitter includes a first clutch mechanism, a second clutch mechanism, a mounting plate, a screw, a screw nut and a tie rod connecting shaft. The screw nut is matched with the screw. When the screw rotates, the screw nut can translate back and forth. One end of the screw nut is used to install the tie rod connecting shaft, and the tie rod connecting shaft is connected to the inner tie rod of the machine tool spindle. The screw rod passes through the mounting plate, the first clutch mechanism and the second clutch mechanism both include a magnetic seat and a clutch member that can be connected or separated from each other, the magnetic seat has an energized electromagnetic coil, and the clutch member is controlled to be connected or separated by energizing or de-energizing the magnetic seat, and the magnetic seats are respectively fixed to both sides of the mounting plate and do not move with the rotating force transmitter; The second clutch mechanism includes a second clutch plate and a second rotating seat. The magnetic seat of the second clutch mechanism is called a second magnetic seat. The second clutch plate is connected to the main shaft of the machine tool body through a flange. The second rotating seat can rotate with the screw. When the second magnetic seat is powered on or off, the second clutch plate and the second rotating seat are attracted to make the rotary force transmitter and the main shaft of the machine tool body drive connected. The machine tool body comprises a pulley and a pulley flange fixedly connected to the machine tool spindle, and the pulley flange is used to install a rotary force transmitter; The rotary force transmitter also includes a bearing mounting seat, a bearing and a bearing surface flange. The screw nut mounting sleeve is fixedly mounted on the bearing mounting seat and is used to radially position the screw nut to prevent the screw nut from rotating with the screw, but can slide axially. The bearing is installed in the bearing mounting seat and is sleeved on the screw input end.

2. The machine tool with an electric clamping system according to claim 1, characterized in that: The first clutch mechanism is installed at the input end of the rotary force transmitter, and the second clutch mechanism is installed at the middle part of the input end of the rotary force transmitter.

3. The machine tool with an electric clamping system according to claim 1, characterized in that: The drive motor assembly and the screw rod can be connected or disconnected in transmission through the first clutch mechanism. The first clutch mechanism includes a first clutch plate, a first rotating seat and a first magnetic seat. The first clutch plate is fixed on the drive motor assembly, and the first rotating seat is mounted on the screw rod of the rotary force transmitter.

4. The machine tool with an electric clamping system according to claim 3, characterized in that: After the first clutch plate is disconnected from the first rotating seat, a distance of 0.1-1 mm is provided between the first clutch plate and the first rotating seat.

5. The machine tool with an electric clamping system according to claim 1, characterized in that: The second rotating seat is sleeved on the screw rod of the rotating force transmitter.

6. The machine tool with an electric clamping system according to claim 1, characterized in that: After the second clutch plate is disconnected from the second rotating seat, a distance of 0.1-1 mm is provided between the second clutch plate and the second rotating seat.

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