Rotary force transmission device and machine tool

Abstract

A rotary force transmission device (2) and a machine tool. The rotary force transmission device (2) comprises a power connecting portion, a machine tool spindle fixing portion, a first clutch mechanism, a lead screw (21), a lead screw nut (22) and a pull rod connecting shaft (23), wherein the lead screw nut (22) matches the lead screw (21); when the lead screw (21) rotates, the lead screw nut (22) can translate forwards and backwards; the pull rod connecting shaft (23) is mounted to the lead screw nut (22) at one end of the lead screw nut; the power connecting portion is located at an input end of the lead screw (21); the machine tool spindle fixing portion is adjacent to an output end of the lead screw (21); and part of the first clutch mechanism is connected to the power connecting portion, and part of the first clutch mechanism is connected to the lead screw (21), such that the power connecting portion is in transmission connection with or is in disengaged transmission connection from the lead screw (21). The rotary force transmission device (2) can be directly, serving as one associated component, sleeved inside the machine tool spindle (41), such that the reliability is better.

Description

Rotary force transmitter and machine tool Technical Field

[0001] The present invention relates to the technical field of chuck driving, in particular to a rotary force transmitter and a machine tool. Background Art

[0002] A chuck is a mechanical device used to clamp workpieces on machine tools. It is a machine tool accessory that clamps and positions workpieces using the radial movement of movable jaws evenly distributed on the chuck body. A chuck generally consists of three parts: the chuck body, the movable jaws, and the jaw drive motor assembly. The chuck body has a minimum diameter of 65 mm and a maximum of 1500 mm, with a central through-hole to allow passage of workpieces or bar stock. The back has a cylindrical or short tapered structure that connects directly or via a flange to the end of the machine tool spindle. Chucks are typically installed on lathes, external and internal cylindrical grinders, and can also be used in conjunction with various indexing devices for milling and drilling machines. Existing mainstream chucks can be divided into manual chucks, pneumatic chucks, and hydraulic chucks based on the power used.

[0003] The existing drive chuck opening and closing mechanism adopts the structure of hydraulic station and high-pressure oil 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] Summary of the Invention

[0005] Based on this, it is necessary to provide a green, environmentally friendly and more stable rotary force transmitter.

[0006] The present invention provides a rotary force transmitter, comprising a power connection portion, a machine tool spindle fixing portion, a first clutch mechanism, a screw and a screw nut, wherein the screw nut is matched with the screw and can translate back and forth when the screw rotates. The drive connection portion is located at the input end of the screw, and the machine tool spindle fixing portion is close to the output end of the screw. The first clutch mechanism enables the power connection portion to be transmission-connected or disengaged from the screw.

[0007] Preferably, the rotary force transmitter further comprises a pull rod connecting shaft, one end of the screw nut is mounted with the pull rod connecting shaft, and the first clutch mechanism is partially connected to the power connection portion and partially connected to the screw.

[0008] Preferably, the rotary force transmitter further comprises a second clutch mechanism, a portion of which is connected to a fixed portion of the machine tool spindle, and a portion of which is connected to the screw rod, so that the screw rod is driven to rotate when the fixed portion of the machine tool spindle rotates; or

[0009] The rotary force transmitter includes a self-locking connector, and the machine tool spindle fixing part and the screw rod are transmission-connected or disengaged through the self-locking connector.

[0010] Preferably, the rotary force transmitter also includes a reducer, which is arranged between the first clutch mechanism and the screw rod, the input end of the reducer and the power connection part are connected or disconnected through the first clutch mechanism, and the output end of the reducer is connected to the screw rod.

[0011] Preferably, the rotary force transmitter further includes a second clutch mechanism, which is arranged between the input end of the reducer and the power connection part, and the input end of the reducer is transmission-connected or disconnected with the machine tool spindle fixing part through the second clutch mechanism.

[0012] Preferably, the rotary force transmitter also includes a main housing, one end of the main housing is used to fix the machine tool spindle, and the other end is fixed to the housing of the reducer; a part of the second clutch mechanism is fixed to the housing of the reducer, and the other part of the second clutch mechanism is fixed to the input end of the reducer; the second clutch mechanism has an engaged state or a disengaged state, when in the engaged state, the machine tool spindle rotates synchronously with the main housing, the housing of the reducer and the input end of the reducer in sequence; when in the disengaged state, the housing of the reducer and the input end of the reducer are disconnected from the synchronous rotation connection.

[0013] Preferably, a protective shell is further provided outside the rotary force transmitter, and the screw, screw nut, reducer, first clutch mechanism and second clutch mechanism are arranged on the protective shell.

[0014] Preferably, the protective housing is further provided with a positioning mechanism, the screw, reducer, first clutch mechanism and second clutch mechanism are arranged coaxially with the main housing, and the positioning mechanism is used to adjust the position of the main housing and the protective housing and make the axes of the two adapt;

[0015] The rotary force transmitter also includes a magnetic induction device, a part of which is fixedly arranged on the protective shell, and the other part moves axially synchronously with the screw nut. The magnetic induction device is used to limit the axial stroke of the screw nut.

[0016] Preferably, the input end of the reducer is provided with a reduction input shaft, the first clutch mechanism includes a first clutch plate, a first rotating seat and a first magnetic seat, and the second clutch mechanism includes a second clutch plate, a second rotating seat and a second magnetic seat; the first clutch plate is fixed on the power connection part, the second clutch plate is fixed on the outer shell of the reducer, the first rotating seat and the second rotating seat are fitted on and fixed to the reduction input shaft, the first magnetic seat can make the first clutch plate and the first rotating seat attract or disconnect; the second magnetic seat can make the second clutch plate and the second rotating seat attract or disconnect.

[0017] Another aspect of the present invention provides a machine tool, comprising a drive motor assembly, a machine tool body, a chuck, and the aforementioned rotary force transmitter, 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 chuck's jaws, the drive 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;

[0018] 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. 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;

[0019] When a workpiece needs to be processed, the drive 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.

[0020] Preferably, the rotary force transmitter comprises a transition plate, the transition plate being provided with two mounting end surfaces and a movable through hole penetrating the two mounting end surfaces, the movable through hole being used for movably passing a pull rod, the transition plate being further provided with a mounting mechanism, the machine tool spindle and the rotary force transmitter being fixedly mounted on the mounting end surfaces of the transition plate via the mounting mechanism;

[0021] The mounting mechanism includes a first threaded hole and a second threaded hole, and the first threaded hole and the second threaded hole pass through the two mounting end surfaces of the transition plate. The main shell of the rotary force transmitter is mounted on the mounting end surface of the transition plate through the first threaded hole and the main shell fastener, and the machine tool spindle is mounted on the other mounting end surface of the transition plate through the second threaded hole and the spindle fastener.

[0022] The rotary force transmitter provided by the present invention can be directly installed in the main shaft of a machine tool as a related component, and the structure has better reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other purposes, features and advantages of the present invention will become more apparent by describing in more detail the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the accompanying drawings, and the drawings are not intentionally scaled to actual size, but rather are intended to illustrate the subject matter of the present invention.

[0024] FIG1 is a schematic diagram of a machine tool mechanism provided by the present invention;

[0025] FIG2 is a schematic diagram of the cross-sectional structure of a machine tool provided by the present invention;

[0026] Figure 3 is an enlarged schematic diagram of the structure of part A in Figure 2;

[0027] FIG4 is a schematic structural diagram of a rotary force transmitter provided by the present invention;

[0028] FIG5 is an enlarged schematic diagram of the structure of part B in FIG4 ;

[0029] FIG6 is an enlarged schematic diagram of the structure of portion C in FIG4 ;

[0030] FIG7 is another embodiment of the present invention;

[0031] FIG8 is an enlarged schematic diagram of part of the structure in FIG7;

[0032] FIG9 is an enlarged schematic diagram of part of the structure in FIG7;

[0033] [Corrected 04.07.2024 according to Rule 91] Figure 10 is a schematic diagram of the transition plate structure provided by the present invention.

[0034] Figure 11 is a graph showing the output torque and force. Drive motor assembly 1, rotary force transmitter 2, machine tool body 4, motor 11, reducer 12, screw 21, screw nut 22, pull rod connecting shaft 23, first mounting plate 24, second mounting plate 25, support plate 26, first flange fixing bolt 27, first flange 28, mounting rod 29, nut 30, bearing mounting seat 31, bearing surface flange 32, protective plate 33, machine tool spindle 41, pull rod 42, screw nut mounting sleeve 221, limit block 222, bearing 311, first magnetic seat 341, second magnetic seat 342, first clutch plate 351, second clutch plate 352, first rotating seat 361, second rotating seat Seat 362; first clutch mechanism 350, second clutch mechanism 360, elastic mechanism 363, friction plate 364, friction plate 365, motor mounting frame 13, output shaft key connection position 14, reduction input shaft 121, shaft end nut 122, screw tail end bearing 34, bearing clamping nut 35, main housing 36, magnetic induction device 37, induction magnetic ring 371, magnetic sensor 372, spindle housing 43, transition plate 50, housing mounting plate 51, housing flange 52, main housing fastener 53, movable through hole 54, first threaded hole 55, second threaded hole 56, protective housing 60, positioning mechanism 61, second threaded hole 56. DETAILED DESCRIPTION

[0035] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings.

[0036] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element and integrated therewith, or there may be an intermediate element. The terms "mounted", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] Referring to Figures 1-6, the present invention provides a rotary force transmitter, which includes a first clutch mechanism, a second clutch mechanism, a screw 21, a screw nut 22, a pull rod connecting shaft 23, a power connection part, and a machine tool spindle fixing part. The power connection part is used to install the driving mechanism, the pull rod connecting shaft 23 is used to connect the pull rod 42, and the machine tool spindle fixing part is used to connect the machine tool spindle 41.

[0039] The screw rod 21 is installed at the center of the rotary force transmitter 2 through the bearing 311, and serves as a power input shaft, which can rotate synchronously with the reducer to provide push / pull force.

[0040] The screw nut 22 is mated to the screw 21. When the screw 21 rotates, the screw nut 22 translates back and forth, converting rotational motion into linear motion. One end of the screw nut 22 is externally threaded for mounting the tie rod connecting shaft 23. A screw nut mounting sleeve 221 is fixedly mounted on the bearing mounting seat 31 and radially positions the screw nut, preventing it from rotating with the screw, but allowing axial sliding. A limit block 222 is mounted on the end of the screw to prevent the screw nut from sliding out due to overtravel.

[0041] One end of the pull rod connecting shaft 23 is connected to the screw nut and the other end is connected to the pull rod 42 inside the machine tool spindle 41 through a threaded manner, so as to transmit push / pull force.

[0042] The power connection portion includes a first mounting plate 24 , and the first mounting plate 24 is used to mount a reducer of the driving mechanism.

[0043] The machine tool spindle's fixed portion includes a bearing mount 31, a bearing 311, and a bearing flange 32. The bearing mount 31 is mounted on the screw input side and bolted to the pulley flange. Its interior houses a locating bearing 311. The bearing 311, mounted within the bearing mount 31 and fitted over the screw input, ensures smooth screw rotation and withstands axial tension during clamping and loosening. This embodiment utilizes an end thrust ball bearing 311, but other bearings 311, such as spherical roller bearings, are also acceptable. The bearing flange 32 is bolted to the bearing mount 31, compressing and locating the bearing 311.

[0044] The rotary force transmitter of the present invention further includes a second mounting plate 25 , a support plate 26 , first flange fixing bolts 27 , a first flange 28 , and a protective plate 33 .

[0045] The second mounting plate 25 is fixedly connected to the mounting base of the machine tool spindle 41 via mounting rods 29 and nuts 30. The support plate 26 secures the first mounting plate 24 and the second mounting plate 25. The first flange fixing bolts 27, which can be multiple or single, are mounted on the first flange 28. The first flange 28 is fixed to the output shaft of the reducer and rotates with the reducer. The mounting rods and nuts secure the second mounting plate 25 to the machine tool body 4. A protective plate 33, in conjunction with the support plate 26, forms a shield to prevent foreign matter from entering the machine.

[0046] In a preferred embodiment, the first clutch mechanism and the second clutch mechanism may adopt electromagnetic clutch or mechanical clutch.

[0047] In a further preferred embodiment, both the first and second clutch mechanisms include a magnetic base and a clutch member that can be connected or disconnected. The magnetic base of the first clutch mechanism is referred to as the first magnetic base 341, and the magnetic base of the second clutch mechanism is referred to as the second magnetic base 342. The connection or disconnection of the clutch member is controlled by energizing or de-energizing the magnetic base. The magnetic base contains an energized electromagnetic coil that controls whether magnetic attraction occurs when it is energized or de-energized.

[0048] 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.

[0049] If a normally closed structure is used, the consumption of electric energy can be reduced, the stability of clamping during the processing process 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.

[0050] 4 , in a preferred embodiment, the magnetic bases 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 .

[0051] 4-5 , in 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 to 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, thereby achieving a transmission connection between the drive motor assembly 1 and the screw 21. 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, a spacing of 0.1-1 mm, further a spacing of 0.2-0.4 mm, and further a spacing of 0.3 mm is maintained between the first clutch plate 351 and the first rotating seat 361, and the two are not connected to each other.

[0052] The first rotating seat 361 is keyed to one end of the input shaft of the screw 21. It applies the kinetic energy (torque) transmitted by the first clutch plate 351 to the screw 21, driving its rotation. Under the action of the magnetic seat, the first clutch plate 351 slightly deforms to mate with the end surface of the first rotating seat. The combined effects of magnetic attraction and friction transmit the kinetic energy (torque) output by the reducer to the first rotating seat 361.

[0053] The specific working principle of the first clutch mechanism (taking the normally open structure as an example) is as follows:

[0054] Referring to Figures 4-6, the first clutch mechanism is installed at the power (torque) input end of the rotary force transmitter 2. The first flange 28 and the first clutch plate 351 are fixedly connected as a whole and mounted on the output shaft of the reducer. The first rotating seat 361 is fixed to the screw input end to ensure that the two can rotate synchronously. 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 attract each other (the gap is 0 at this time) and form an integral component. At this time, the power (torque) transmitted by the deceleration can directly act on the screw, driving the screw to rotate, which can 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 operate independently without affecting each other.

[0055] Referring to Figures 4-6, in a preferred embodiment, the rotary force transmitter 2 and the main shaft 41 of the machine tool body 4 are connected or disconnected via a second clutch mechanism. The second clutch mechanism includes a second clutch plate, a second rotating seat 362, and a second magnetic seat 342. The second clutch plate 352 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 to each other, thereby connecting the rotary force transmitter 2 to the main shaft 41 of the machine tool body 4. After the second clutch plate is disconnected from the second rotating seat 362, a spacing of 0.1-1 mm is formed between the second clutch plate and the second rotating seat 362, and further a spacing of 0.2-0.4 mm is formed between the second clutch plate and the second rotating seat 362.

[0056] The second rotating seat 362 is fixedly sleeved on the middle side of one end of the screw input shaft through a key, and can transmit the kinetic energy (torque) from the screw to the second clutch plate.

[0057] 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 into the end face of the second rotating seat 362. Through the combined action of magnetic attraction and friction, the screw rod and the rotary torque device are relatively fixed to the machine tool spindle 41 and temporarily combined into a whole. When the screw rod provides and transmits tension to the pull rod 42 to clamp the workpiece and process it, the rotary torque device 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 torque device and the machine tool spindle 41 become two relatively movable individuals.

[0058] The specific working principle of the second clutch mechanism is as follows:

[0059] 1. Normally open structure

[0060] The bearing end face flange 32, which is mounted near the middle of the power (torque) input end of the rotary force transmitter, is fixedly connected to the second clutch plate 352 as a whole and mounted on the bearing mounting seat 31. The second rotating seat 362 is fixed to the middle of the screw input end to ensure that the two can rotate synchronously. 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 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 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 attract each other (the gap is 0 at this time) to form an integral component. 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 power to the second magnetic seat 342 is cut 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 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, and the independent operation of the screw rod in the rotating force transmission part can be realized when the machine tool spindle 41 is stationary.

[0061] 2. Normally closed structure

[0062] 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 engaged, ensuring that the rotary 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 engaged, 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, ensuring that the rotary force transmission device 2 and the machine tool spindle 41 are temporarily disconnected and can operate independently.

[0063] The present invention designs the rotary force transmission part as an associated rotary force transmitter which is mounted inside the machine tool spindle. The main parts can rotate with the spindle. The axial force generated when the push / pull action occurs will be directly applied to the machine tool spindle rather than being carried by the bearings. Therefore, the structure has higher reliability.

[0064] 1-3, this embodiment also provides a machine tool, including the rotary force transmitter, drive mechanism and machine tool body mentioned in the above embodiment, the drive mechanism includes a motor 11 and a reducer 12. The machine tool body includes a pull rod 42 and a spindle 41. When it is necessary to clamp or loosen the workpiece, the first clutch mechanism causes the drive motor assembly 1 and the rotary force transmitter 2 to be connected in transmission, and the rotary force transmitter 2 and the spindle 41 of the machine tool body 4 are disconnected 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.

[0065] When the workpiece is clamped and needs to be processed in the next step, the drive motor assembly 1 and the rotary force transmitter 2 are disconnected from the transmission connection, and the driving force of the drive 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 clamping jaws to open. At this time, the rotary force transmitter 2 and the main shaft 41 of the machine tool body 4 are connected by 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 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 clamping jaws to open.

[0066] Please refer to FIG. 7 to FIG. 11 , another embodiment of the present invention provides a rotation force transmitter.

[0067] The rotary force transmitter 2 includes a power connection portion, a fixed portion of the machine tool spindle 41, a first clutch mechanism 350, a screw 21 and a screw nut 30. The screw nut 30 is matched with the screw 21. When the screw 21 rotates, the screw nut 30 can translate back and forth. The drive connection portion is located at the input end of the screw 21, and the fixed portion of the machine tool spindle 41 is close to the output end of the screw 21. The first clutch mechanism 350 enables the power connection portion to be connected or disconnected from the screw 21. It also includes a reducer 12. The reducer 12 is arranged between the first clutch mechanism 350 and the screw 21. The input end of the reducer 12 and the power connection portion are connected or disconnected through the first clutch mechanism 350. The output end of the reducer 12 is connected to the screw 21. The above arrangement increases the service life of the first clutch and prevents the first clutch mechanism 350 from being arranged at the output end of the reducer 12 and being subjected to higher torque. For example, if the reduction ratio of the reducer 12 is 50:1, the torque is amplified approximately 50 times. If the first clutch mechanism 350 is provided at the output end of the reducer 12, the torque it bears is amplified approximately 50 times.

[0068] In a preferred embodiment, the rotary force transmitter 2 further includes a second clutch mechanism 360, which is disposed between the input end of the reducer 12 and the power connection portion. The input end of the reducer 12 is connected to and disconnected from the fixed portion of the machine tool spindle 41 via the second clutch mechanism 360. The first clutch mechanism 350 and the second clutch mechanism 360 ensure that the clamping process and the rotation process of the machine tool spindle 41 are decoupled. The axial force generated during the push / pull action acts directly on the machine tool spindle 41, rather than being carried by the bearing 311. This makes the structure of this embodiment more reliable and also increases the service life of the second clutch mechanism 360.

[0069] Of course, in order to achieve transmission connection or disconnection between the machine tool spindle 41 and the screw 21, a self-locking connector can be used in other embodiments. For example, the rotary force transmitter 2 includes a self-locking connector, and the fixed portion of the machine tool spindle 41 and the screw 21 are transmission-connected or disconnected via the self-locking connector. The self-locking connector can be a self-locking structural member within the reducer 12, or the self-locking connector can be a self-locking screw assembly (which includes a screw nut 30 and a screw 21 assembly, and includes a self-locking connector). The self-locking reducer 12 and the self-locking screw assembly are prior art and are not further defined herein.

[0070] In a preferred embodiment, the rotary force transmitter 2 also includes a main housing 36, one end of the main housing 36 is used to fix the machine tool spindle 41, and the other end is fixed to the housing of the reducer 12. The main housing 36 is installed and fixed on the machine tool spindle 41, and can rotate synchronously with the machine tool spindle 41 at high speed during the processing; a part of the second clutch mechanism 360 is fixed to the housing of the reducer 12, and the other part of the second clutch mechanism 360 is fixed to the input end of the reducer 12, and the input end of the reducer 12 is the reduction input shaft 121; the second clutch mechanism 360 has an engaged state or a disengaged state. When in the engaged state, the machine tool spindle 41 rotates synchronously with the main housing 36, the housing of the reducer 12 and the input end of the reducer 12 (i.e., the reduction input shaft 121) in sequence. When in the disconnected state, the housing of the reducer 12 and the input end of the reducer 12 are disconnected from the synchronous rotation connection, that is, the reduction input shaft 121 and the housing of the reducer 12, the main housing 36 and the machine tool spindle 41 are disconnected from the transmission connection, thereby ensuring that the screw rod 21 is disconnected from the above three. At this time, if the first clutch mechanism 350 is engaged, the motor 11 and the reduction input shaft 121 are connected in transmission through the first clutch mechanism 350, and the forward and reverse rotation of the motor 11 can realize the clamping and release of the chuck.

[0071] In a preferred embodiment, a protective housing 60 is further provided outside the rotary force transmitter, and the screw 21, screw nut 30, reducer 12, first clutch mechanism 350 and second clutch mechanism 360 are provided inside the protective housing 60. Protection refers to preventing dust, powder, water mist and other debris from entering and protecting the components in the rotary force transmitter. The provision of the protective housing 60 prevents dust from entering the screw 21, screw nut 30, reducer 12, first clutch mechanism 350 and second clutch mechanism 360. The protective housing 60 increases the service life of these components and makes the rotary force transmitter 2 suitable for mining or other dusty scenes. Furthermore, the protective housing 60 does not rotate relative to the machine tool, nor does it rotate with the machine tool spindle 41, and is used to connect and install the positioning motor 11 and install the non-rotating first magnetic seat 341 and second magnetic seat 342 in the fixed electromagnetic clutch.

[0072] In a preferred embodiment, the protective housing 60 is further provided with a positioning mechanism 61. The screw 21, reducer 12, first clutch mechanism 350, and second clutch mechanism 360 are all coaxially arranged with the main housing 36. The positioning mechanism is used to adjust the coaxiality of the axes of the aforementioned four components with the axis of the protective housing 60. The positioning mechanism 61 is used to adjust the position of the main housing 36 and the protective housing 60 so that their axes are aligned, generally aligning their axes.

[0073] The positioning mechanism 61 includes a positioning bolt and a positioning threaded hole. The positioning bolt and the positioning threaded hole cooperate with each other. The positioning threaded hole passes through the protective shell 60. The positioning threaded hole is arranged circumferentially along the protective shell 60. The positioning bolt passes through the positioning threaded hole and extends into the protective shell. The positioning bolt supports the rotary force transmitter.

[0074] The positioning threaded holes are evenly distributed on the circumference of the protective shell 60, and can be divided into 3 or 4 groups (circles). 1 to 3 groups can be configured axially to ensure that the center of the pull rod 42, the rotating part of the rotary force transmitter and the protective shell 60 can be aligned with the rotation axis during the assembly process. After the rotary force transmitter and the pull rod 42 are installed on the machine tool body, the positioning bolts of the positioning mechanism can be loosened toward the protective shell 60 and fixed in position to ensure that the pull rod 42 rotates normally.

[0075] In a preferred embodiment, the rotary force transmitter 2 further includes a magnetic sensing device 37. A portion of the magnetic sensing device 37 is fixedly mounted within the protective housing 60, while the other portion moves axially in sync with the lead screw nut 30. The magnetic sensing device 37 is used to limit the axial travel of the lead screw nut 30. This ensures easy installation and commissioning, and ensures that the device operates within its normal travel range.

[0076] The magnetic induction device 37 includes an induction magnet ring 371 and a magnetic sensor 372. The induction magnet ring 371 is mounted and fixed to the lead screw nut 30, which only moves in the forward and backward axial direction. The magnetic sensor 372 is mounted in the protective housing 60. The induction magnet ring 371 and the magnetic sensor 372 are used to limit the axial travel of the electric pull rod 42. Furthermore, the main housing 36 is mounted outside the lead screw nut 30. The main housing 36 is provided with an escape hole (not shown). The induction magnet ring 371 is connected to the lead screw nut 30 via a connecting rod (not shown). The connecting rod can move in the escape hole.

[0077] In a preferred embodiment, the input end of the reducer 12 is provided with a reduction input shaft 121. The first clutch mechanism 350 includes a first clutch plate 351, a first rotating seat 361, and a first magnetic seat 341. The second clutch mechanism 360 includes a second clutch plate 352, a second rotating seat 362, and a second magnetic seat 342. The first clutch plate 351 is fixed to the power connection portion, and the second clutch plate 352 is fixed to the housing of the reducer 12. The first rotating seat 361 and the second rotating seat 362 are mounted and fixed to the reduction input shaft 121. The first magnetic seat 341 can engage or disconnect the first clutch plate 351 with the first rotating seat 361; the second magnetic seat 342 can engage or disconnect the second clutch plate 352 with the second rotating seat 362. Furthermore, the first magnetic seat 341 and the second magnetic seat 342 are fixed to the protective housing 60. The reduction input shaft 121 is installed in the two electromagnetic clutches and the reducer 12 to transmit torque. The first electromagnetic clutch preferably adopts a normally open structure. The first electromagnetic clutch controls the torque input of the motor 11. When the workpiece needs to be clamped, it is energized to attract and transmit the output torque of the motor 11. After the workpiece is clamped and during machining, it is de-energized to disengage, ensuring that the main portion of the electric pull rod 42 can rotate at high speed with the machine tool's electric spindle. The first clutch plate 351 is an electromagnetic attraction plate. The first rotating seat 361 and the first clutch plate 351 are made of a high-friction material. The first magnetic seat 341 is an electromagnet.

[0078] The second electromagnetic clutch (brake) is preferably a normally closed structure. It acts as a brake during the machining process to maintain the clamping force of the pull rod 42. During the workpiece clamping process, it is powered on and magnetically separated to ensure that the pull rod 42 and the machine tool spindle 41 can rotate relatively independently to clamp the workpiece. After the workpiece is clamped, the power is turned off and the magnet is demagnetized. Under the action of the spring, the friction plate is reset and attracted, so that the electric pull rod 42 and the machine tool spindle are reconnected to form a synchronously rotating integrated structure. The second electromagnetic clutch is preferably composed of normally closed components. The second magnetic seat 342 is an electromagnet.

[0079] The second clutch plate 352 is an electromagnetically attracted plate, and the second rotating seat 362 and second magnetic seat 342 are generally electromagnets. The second electromagnetic clutch also includes an elastic mechanism 363, a friction plate A 364, and a friction plate B 365. The elastic mechanism 363 can be a spring. Friction plate A is located to the left of friction plate B. The second clutch plate 352 includes clutch plate A and clutch plate B. In Figure 8, the two arrows on the second clutch plate 352 point to clutch plate A and clutch plate B, respectively. Clutch plate A is located to the left of clutch plate B. The various components of the second electromagnetic clutch also have the following structures and effects:

[0080] The electromagnetic attraction plate (second rotating seat 362) is installed on the deceleration input shaft 121 through a key connection and can rotate with it; a friction position is provided on the end face of the electromagnetic attraction plate close to the clutch plate A. When the electromagnetic attraction plate and the clutch plate A are attracted, the friction force with the clutch plate A is increased through the friction position. When the power is cut off and separated, the electromagnetic attraction plate interacts with the friction plate A364 to bear the torque of the deceleration input shaft 121.

[0081] Clutch plate A: It is connected to the friction plate A364 as a whole through bolts, guide columns and elastic mechanism 363, and can be axially slidably mounted on the clutch plate B.

[0082] Clutch plate B: fixedly mounted on the reduction input shaft 121 and used to install the clutch plate A, elastic mechanism 363 and friction plate A364, providing support for the axial movement of the clutch.

[0083] Elastic mechanism 363: It is installed in clutch plate B. When no power is applied, the elastic force ensures that friction plate A364 and friction plate B365 are in close contact with each other, and the friction force ensures that the rotary force transmitter 2 and the machine tool spindle 41 rotate synchronously.

[0084] Friction plate A: connected to clutch plate A. When the workpiece is being processed, the electromagnet is not energized. At this time, under the action of the elastic mechanism 363, the friction plate A364 is axially pressed against the friction plate B365, and the torque of the machine tool spindle 41 is taken over. When the processing is completed and the workpiece is clamped, the electromagnet is energized, and the clutch plate A slides axially toward the electromagnet under the action of the magnetic attraction, driving the friction plate A364 to separate from the friction plate B365, thereby separating the machine tool spindle 41 and the rotary force transmitter 2.

[0085] Friction plate B: fixedly mounted on the housing of the reducer 12, it can be set as a whole with the housing of the reducer 12, and combined with the friction plate A364 to transmit the torque of the machine tool spindle 41.

[0086] The motor mounting bracket 13 is used to install the motor 11 and connect the motor 11 to the main body of the pull rod 42. The screw assembly is used to convert the rotational motion input by the motor 11 into axial motion. After the outer shell mounting plate 51 is fixedly installed on the non-rotating structure at the tail end of the machine tool spindle 41 by bolts, the outer shell of the electric pull rod 42 is fixedly installed on the mounting plate by bolts, so that the outer shell of the electric pull rod 42 is fixedly connected to the machine tool. The spindle housing 43 is fixed on the machine tool for installing an electric spindle or an ordinary spindle. The output shaft key connection position 14 is used to connect to the output end of the motor 11. The shaft end nut 122 is used to be installed on the input end of the connecting shaft to assist in limiting the electromagnetic clutch. In a further preferred embodiment of the pull rod connecting shaft 23: the screw nut 30 is connected to the pull rod 42, and this connecting sleeve can also be designed as an integral structure with the screw nut 30 or the pull rod 42.

[0087] The present invention also provides a transition plate 50, which is provided with two mounting end faces and a movable through hole 54 passing through the two mounting end faces. The movable through hole 54 is used to movably pass the pull rod 42. The pull rod 42 can move in the axial direction through the movable through hole 54. The pull rod 42 is connected to the pull rod 42 connecting shaft 23 and the nut 30 or the pull rod 42 and the nut 30 are integrally provided. In this case, the pull rod 42 connecting shaft 23 and the nut 30 are regarded as the pull rod 42, that is, this method falls within the scope of protection of the present invention. The transition plate 50 is also provided with a mounting mechanism, and the machine tool spindle 41 and the rotary force transmitter 2 are mounted on the mounting end face of the transition plate 50 through the mounting mechanism. Because the tail mounting position structure of the machine tool spindle 41 of each manufacturer is different, this transition plate 50 is set as a non-uniform part designed on demand, and the pull rod 42 can be adaptively installed and fixed on different machine tool spindles 41, and ensure that the rotary force transmitter 2 and the pull rod 42 are coaxial with the center of the machine tool spindle 41.

[0088] In a preferred embodiment, the mounting mechanism includes a first threaded hole 55 and a second threaded hole 56 extending through both mounting end surfaces of the transition plate 50. The main housing 36 of the rotary force transmitter 2 is fixed to the mounting end surface of the transition plate 50 via the first threaded hole 55 and the main housing fastener 53. The machine tool spindle 41 is mounted on the other mounting end surface of the transition plate 50 via the second threaded hole 56 and the spindle fastener. The main housing fastener 53 and the spindle fastener are setscrews. When the machine tool spindle 41 rotates, the transition plate 50 and the main housing 36 rotate synchronously with the machine tool spindle 41. When the tie rod 42 moves axially, the transition plate 50 does not move with the tie rod 42. When the second clutch mechanism 360 is engaged, the machine tool spindle 41 rotates synchronously with the main housing 36, the transition plate 50, the housing of the reducer 12, and the input terminal of the reducer 12. When the second clutch mechanism 360 is engaged, the machine tool spindle 41 rotates synchronously with the main housing 36, the transition plate 50, the housing of the reducer 12, and the input terminal of the reducer 12. When the second clutch mechanism 360 is disengaged, the housing of the reducer 12 and the input terminal of the reducer 12 are disconnected from the synchronous rotation connection. It is more convenient to install the rotary force transmitter 2, the pull rod 42 and the machine tool spindle 41, ensure that the centers of the three are coaxial, and improve the assembly accuracy of the three.

[0089] In a preferred embodiment, a protective housing 60 is further provided on the outside of the rotary force transmitter 2. A housing flange 52 is fixedly mounted on one end of the protective housing 60 near the output end of the screw 21. The protective housing 60 is sleeved over the transition plate 50. Furthermore, the housing flange 52 and the protective housing can be designed as a single unit. The protective housing can be bolted together to fit over the transition plate 50 at the rear end of the machine tool spindle 41, facilitating installation of the rotary force transmitter 2.

[0090] In a preferred embodiment, the housing mounting plate is fixedly connected to the spindle housing 43, which is in turn fixedly connected to the housing flange 52. The machine spindle 41 is mounted within the spindle housing 43, which serves to mount the machine spindle 41 on the machine tool body 4. The spindle housing 43, the housing mounting plate, and the protective housing are fixed relative to the machine tool and do not rotate with the spindle 41. The housing flange 52 and the housing mounting plate improve installation efficiency; in conjunction with the positioning mechanism 61, the screw rod 21 and the pull rod 42 are mounted coaxially, and the machine spindle 41 and the protective housing are mounted coaxially.

[0091] The present invention also provides an electric clamping system, which includes a rotary force transmitter 2, which includes a power connection part, a screw rod 21, a screw rod 21 nut 30 and a transition plate 50. The screw rod 21 nut 30 is matched with the screw rod 21. When the screw rod 21 rotates, the screw rod 21 nut 30 can translate back and forth. The drive connection part is located at the input end of the screw rod 21, and the drive connection part is used to connect to the motor 11; a protective shell is also provided outside the rotary force transmitter 2, and the screw rod 21 and the screw rod 21 nut 30 are arranged outside the cavity of the protective shell, and the protective shell protects the screw rod 21 and the screw rod 21 nut 30.

[0092] The electric clamping system further comprises the aforementioned rotary force transmitter 2 , the drive motor assembly 1 and the chuck. The electric clamping system and the machine tool body 4 cooperate to form the following machine tool for machining workpieces.

[0093] On the other hand, the present invention provides a machine tool, which includes a drive motor assembly 1, a machine tool body 4, a chuck and the above-mentioned rotary force transmitter 2. The machine tool body 4 includes a pull rod 42 and a main shaft. 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 chuck's jaws to open and close. The drive motor assembly 1 and the rotary force transmitter 2 can be transmission-connected or disengaged, and the rotary force transmitter 2 and the main shaft of the machine tool body 4 can be transmission-connected or disengaged. When it is necessary to clamp or loosen the workpiece, the drive motor assembly 1 and the rotary force transmitter 2 are transmission-connected, and the rotary force transmitter 2 and the main shaft of the machine tool body 4 are disengaged. At this time, the drive motor assembly 1 can drive the pull rod 42 to move axially forward and backward through the rotary force transmitter 2, so that the chuck's jaws open and close. When it is necessary to process the workpiece, the drive motor assembly 1 and the rotary force transmitter 2 are disengaged, and the rotary force transmitter 2 is transmission-connected to the main shaft of the machine tool body 4. When the main shaft of the machine tool body 4 rotates, the chuck's jaws are driven to rotate. An example of the machine tool of the present invention can be found in Chinese patent document CN117620240A.

[0094] The present invention has the following advantages:

[0095] 1. The servo motor provides the required low torque, which is energy-efficient and environmentally friendly. The motor operates only during forward rotation (clamping within 1 second) and reverse rotation (releasing within 1 second). A single machining cycle lasts for 2 seconds, which is approximately 3.3% of the operating time of a traditional motor (e.g., 60 seconds). The motor's power is 200 watts, which is approximately 26% to 13% of a traditional 750W / 1500W motor, saving 75% to 85%. The total energy saving is: 100% - 3.3% * 20% = 99.34%. It requires virtually no electricity or hydraulic oil, and is directly electrically driven.

[0096] 2. Motor size comparison: traditional 1.5KW motor traditional 0.75KW motor new structure 200W servo motor.

[0097] Speed: 200W servo motor, 6000RPM, reducer ratio 30, screw lead 5mm, clamping stroke 10mm.

[0098] 3. Clamping time T: 10 / (6000 / 30 / 60*5) = 0.597 seconds, + clamping system delay 0.4 seconds, subtotal < 1.0 seconds. Release time t is the same as the clamping time.

[0099] 4. Tension (Thrust) Adjustment: Set the clamping time and select an appropriate clamping motor speed, such as a 200W Inovance servo motor at 6000 RPM. Adjust the motor's torque output %. The following are measured data: The clamping force is infinitely adjustable (programmable) with a wide adjustment range, covering film chucks up to 4 tons of tension.

[0100] 5. Lightweight: The radial clamping force can be adjusted from 0.1N to 8000N (clamping an egg: the eggshell can withstand 3.4kgf).

[0101] 6. According to the measured data: the minimum pulling force is 0.42KN (42.8kgf), the maximum pulling force is 42.18KN (4.3 tons), which is converted into the radial clamping force of the chuck jaws (the angle between the chuck slider and the horizontal is 12 degrees): 73.69N to 7400N, which is converted into kgf as 7.5 to 754.3kgf. The minimum radial clamping force can completely replace the film chuck.

[0102] The comprehensive performance advantages of the present invention are:

[0103] 1. High-speed performance: There are no components that limit the machine tool speed. Unlike the rotary cylinder (pneumatic cylinder) with a maximum speed of only 4500RPM, which limits the machining workpiece spindle (traditionally called the main spindle) to less than 5000RPM, this system can achieve a higher workpiece spindle speed of 8000 to 9000 rpm (can use collets, CBN, PCD tools), which greatly contributes to improving machine tool efficiency.

[0104] 2. Ultra-high energy saving: save more than 99% of electricity, no need to use compressed gas or hydraulic oil.

[0105] 3. The tensioning force is steplessly adjustable: it adopts dual-mode servo control, and the clamping force can be adjusted by programming in the machine tool program. The tensioning force of a set of devices is steplessly adjustable from 3 kg to 5 tons.

[0106] 4. Environmental protection: Since there is no need to use hydraulic oil, the problem of hydraulic oil leakage causing a bad environment is avoided.

[0107] 5. Strong adaptability: No need to consider the need to repeatedly replace hydraulic oil of different viscosities (winter, summer) due to climate change.

[0108] 6. Low maintenance rate: Currently, more than 30% of equipment maintenance work is done on the hydraulic station and rotary cylinder, such as water ingress to the hydraulic station, motor maintenance (because it needs to run continuously), solenoid valve failure, high-pressure pipe damage, short rotary cylinder life, etc. This device does not require these functional components, has a large design margin, and can achieve low or no maintenance.

[0109] 7. Low cost of use: Compared with the hydraulic station + rotary cylinder system equipped with a 0.75KW motor, it can save nearly 6,000 kWh of electricity per year (24 hours and 330 days), which is equivalent to 4,800 yuan in electricity bills and 1,000 yuan in hydraulic oil, with a total saving of 5,500 yuan; compared with the hydraulic station + rotary cylinder system equipped with a 1.5KW motor, it can save nearly 1,000 yuan per year.

[0110] 8. Good environmental performance: The saved electricity avoids the surrounding temperature rise and noise caused by the heating of traditional hydraulic oil, which improves the comfort of workers' working environment.

[0111] 9. Low carbon: save electricity and hydraulic oil, maintenance and other carbon emissions, belonging to green electromechanical products

[0112] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it 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. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0113] In the description of this specification, the description with reference to the terms "preferred embodiment", "further embodiment", "other embodiments" or "specific example" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0114] 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 rotary force transmitter, characterized in that: It includes a power connection part, a machine tool spindle fixing part, a first clutch mechanism, a screw and a screw nut. The screw nut is matched with the screw. When the screw rotates, the screw nut can translate back and forth. The drive connection part is located at the input end of the screw, and the machine tool spindle fixing part is close to the output end of the screw. The first clutch mechanism enables the power connection part to be transmission-connected or disengaged from the screw.

2. The rotary force transmitter according to claim 1, characterized in that: It also includes a pull rod connecting shaft, one end of the screw nut is mounted with the pull rod connecting shaft, and the first clutch mechanism is partially connected to the power connecting part and partially connected to the screw.

3. The rotary force transmitter according to claim 1, characterized in that: It also includes a second clutch mechanism, a part of which is connected to the fixed part of the machine tool spindle, and a part of which is connected to the screw rod, so that when the fixed part of the machine tool spindle rotates, the screw rod is driven to rotate; or The rotary force transmitter comprises a self-locking connector, through which the machine tool spindle fixing part and the screw rod are transmission-connected or disengaged.

4. The rotary force transmitter according to claim 1, characterized in that: It also includes a reducer, which is arranged between the first clutch mechanism and the screw rod. The input end of the reducer and the power connection part are transmission-connected or transmission-disconnected through the first clutch mechanism, and the output end of the reducer is connected to the screw rod.

5. The rotary force transmitter according to claim 4, characterized in that: It also includes a second clutch mechanism, which is arranged between the input end of the reducer and the power connection part. The input end of the reducer is transmission-connected or disengaged from the machine tool spindle fixing part through the second clutch mechanism.

6. The rotary force transmitter according to claim 5, characterized in that: It also includes a main housing, one end of which is used to fix the machine tool spindle, and the other end is fixed to the housing of the reducer; a part of the second clutch mechanism is fixed to the housing of the reducer, and the other part of the second clutch mechanism is fixed to the input end of the reducer; the second clutch mechanism has an engaged state or a disconnected state. When in the engaged state, the machine tool spindle rotates synchronously with the main housing, the housing of the reducer and the input end of the reducer in sequence; when in the disconnected state, the housing of the reducer and the input end of the reducer are disconnected from the synchronous rotation connection.

7. The rotary force transmitter according to claim 6, characterized in that: A protective shell is also arranged outside the rotary force transmitter, and the screw rod, screw rod nut, reducer, first clutch mechanism and second clutch mechanism are arranged inside the protective shell.

8. The rotary force transmitter according to claim 7, characterized in that: The protective shell is also provided with a positioning mechanism, the screw rod, the reducer, the first clutch mechanism and the second clutch mechanism are arranged coaxially with the main shell, and the positioning mechanism is used to adjust the position of the main shell and the protective shell and make the axes of the two fit together; The rotary force transmitter also includes a magnetic induction device, a part of which is fixedly arranged on the protective shell, and the other part moves axially synchronously with the lead screw nut, and the magnetic induction device is used to limit the axial stroke of the lead screw nut.

9. The rotary force transmitter according to claim 6, characterized in that: The input end of the reducer is provided with a reduction input shaft, the first clutch mechanism includes a first clutch plate, a first rotating seat and a first magnetic seat, and the second clutch mechanism includes a second clutch plate, a second rotating seat and a second magnetic seat; the first clutch plate is fixed on the power connection part, the second clutch plate is fixed on the housing of the reducer, the first rotating seat and the second rotating seat are mounted on and fixed on the reduction input shaft, the first magnetic seat can make the first clutch plate and the first rotating seat engage or disconnect; the second magnetic seat can make the second clutch plate and the second rotating seat engage or disconnect.

10. A machine tool, characterized in that: It comprises a driving motor assembly, a machine tool body, a chuck and a rotary force transmitter as claimed in claim 1, 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 jaws of the chuck to open and close, 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; 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; 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.

11. The machine tool according to claim 10, characterized in that The rotary force transmitter comprises a transition plate, the transition plate is provided with two mounting end faces and a movable through hole penetrating the two mounting end faces, the movable through hole is used to movably pass a pull rod, the transition plate is also provided with a mounting mechanism, and the machine tool spindle and the rotary force transmitter are fixedly mounted on the mounting end face of the transition plate through the mounting mechanism; The mounting mechanism includes a first threaded hole and a second threaded hole, and the first threaded hole and the second threaded hole pass through the two mounting end surfaces of the transition plate. The main shell of the rotary force transmitter is mounted on the mounting end surface of the transition plate through the first threaded hole and the main shell fastener, and the machine tool spindle is mounted on the other mounting end surface of the transition plate through the second threaded hole and the spindle fastener.

Images