Frameless motor fixing device of numerical control machine tool

Abstract

The frameless motor fixing device is arranged in a mounting clamping hole formed in the numerical control machine tool and comprises a motor rotating shaft, a motor shell, a supporting device and a clamping mechanism, a bottom plate is arranged on the motor shell, the bottom plate is connected with the supporting device, the supporting device is arranged in the clamping mechanism, the motor rotating shaft is inserted into the motor shell, and the clamping mechanism is connected with the motor rotating shaft. And the bottom plate is pushed to drive the supporting device to deform, so that the motor shell is fixed. The frameless motor fixing device, the supporting device and the clamping mechanism of the numerical control machine tool are matched, adaptive adjustment can be carried out according to the size and the shape of a mounting clamping hole, the high-precision mounting requirement of a customized frameless motor can be met, the problem that a non-customized frameless motor is low in adaptation degree can be solved to a certain degree, and the practicability is high. And the universality of the device to different types of frameless motors is improved.

Description

Technical Field

[0001] The invention relates to the technical field of frameless motor installation, in particular to a frameless motor fixing device for a numerically controlled machine tool. Background Art

[0002] Frameless motor, also known as frameless torque motor, is a frameless permanent magnet motor, which is divided into inner rotor and outer rotor. In the field of CNC machine tools and precision manufacturing, its high precision and high dynamic response characteristics can improve processing efficiency and product quality and meet the needs of complex processing tasks.

[0003] Frameless motors customized according to user needs have a high degree of installation adaptability, but the production cost of the motor is relatively high, the efficiency is low, and daily maintenance is also troublesome, and the installation process is relatively cumbersome. Non-customized frameless motors are cheap, but have a low degree of adaptability and cannot meet user needs. Summary of the invention

[0004] The object of the present invention is to provide a frameless motor fixing device for a numerically controlled machine tool to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a frameless motor fixing device for a CNC machine tool, arranged in a mounting clamping hole provided on the CNC machine tool, comprising: Motor shaft, motor housing, supporting device and clamping mechanism; A bottom plate is provided on the motor housing, and the bottom plate is connected to the supporting device; The supporting device is arranged in the clamping mechanism; The motor shaft is inserted into the motor housing to push the bottom plate, and the bottom plate drives the supporting device to deform and fix the motor housing.

[0006] Preferably, a connecting rod is provided on the bottom plate, and a coil is provided on one end of the connecting rod; A bearing hole is opened on the motor shell, and a magnet is arranged in the bearing hole. The magnet attracts the coil and pulls the bottom plate, and the bottom plate limits the motor shaft.

[0007] Preferably, a plug hole is provided on the bottom plate; One end of the motor shaft is provided with a plug shaft, which is plugged into the plug hole. One side of the bottom plate is also provided with a pressure bearing, which contacts one end of the motor shaft to reduce the friction of the bottom plate on the motor shaft.

[0008] Preferably, the bottom plate is connected with a traction rope included in the support device, and the support device also includes a rotating shaft sleeve connected to one end of the traction rope, and a clamping claw is provided on the rotating shaft sleeve, and the clamping claw and the clamping mechanism are clamped in cooperation; The supporting device also includes a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft which are arranged on the rotating shaft sleeve; The first rotating shaft connects the connecting plate and the clamping claw, the second rotating shaft connects the supporting small arm and the connecting plate, the third rotating shaft connects the supporting large arm and the supporting small arm, and the fourth rotating shaft connects the supporting large arm and the rotating shaft bearing plate.

[0009] Preferably, the clamping mechanism includes a bearing platform and a clamping groove provided on the motor housing; The bearing platform is used to fix the bearing plate of the slewing bearing; A slide groove is also provided in the clamping groove, and a clamping block is provided at the bottom of the clamping mechanism; A limit rod is arranged on the clamping claw, the limit rod is inserted into the slide groove, and the clamping claw is clamped in the clamping block.

[0010] Preferably, both the supporting small arm and the supporting large arm are provided with a sliding sleeve, and the sliding sleeve is used to limit the traction rope; A through hole is also provided on the supporting arm, and the traction rope passes through the through hole and is connected with the bottom plate.

[0011] Preferably, the number of the supporting devices and the clamping mechanisms is at least two.

[0012] Preferably, a vent hole is provided at one end of the bearing hole, and the vent hole is ventilated into the motor housing.

[0013] Preferably, a knurled groove is provided on the motor shaft, and the knurled groove is plugged into the motor housing to strengthen the rotational force.

[0014] Preferably, a mounting groove is provided on the mounting clamping hole, the size of the mounting groove matches the size of the supporting device, and the supporting device is supported in the mounting groove to fix the motor housing.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The frameless motor fixing device of the CNC machine tool cooperates with the support device and the clamping mechanism, and can be adaptively adjusted according to the size and shape of the installation clamping hole. It can not only meet the high-precision installation requirements of customized frameless motors, but also solve the problem of low adaptability of non-customized frameless motors to a certain extent, thereby improving the versatility of the device to different types of frameless motors.

[0016] The frameless motor fixing device of the CNC machine tool has at least two supporting devices and clamping mechanisms, which are interconnected by rotating shafts, connecting plates and other components to form a stable supporting structure, which can effectively resist the vibration and torque generated when the motor is running, ensure that the motor is stable and reliable during operation, reduce processing errors caused by looseness, and improve processing accuracy and product quality.

[0017] The frameless motor fixture of the CNC machine tool has a relatively simple fixture structure and clear connections between the components. When the motor needs maintenance, it is easy to assemble, which reduces the difficulty and cost of daily maintenance and improves the maintainability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the motor structure of the present invention; Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle; Figure 4 This is a structural schematic diagram of the present invention without the motor shaft; Figure 5 It is a structural schematic diagram of the motor housing of the present invention; Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure at B in the middle; Figure 7 It is a schematic diagram of the bottom plate structure of the present invention; Figure 8 It is a structural schematic diagram of the supporting device of the present invention; Fig. 9 It is a schematic diagram of the magnetic state of the coil of the present invention; Fig.10 It is a schematic diagram of the non-magnetic state of the coil of the present invention.

[0019] In the figure: 1. CNC machine tool; 11. Mounting card hole; 2. Motor shaft; 21. Knurled groove; 22. Plug-in shaft; 3. Motor housing; 31. Bottom plate; 311. Pressure bearing; 312. Connecting rod; 313. Coil; 314. Magnet; 315. Plug-in hole; 32. Vent hole; 33. Bearing hole; 4. Support device; 41. Card claw; 42. Limit rod; 43. First rotating shaft; 45. Rotating shaft sleeve; 44. Second rotating shaft; 46. Connecting plate; 47. Supporting small arm; 48. Traction rope; 49. Sliding sleeve; 410. Third rotating shaft; 411. Supporting large arm; 412. Fourth rotating shaft; 413. Through hole; 414. Rotating shaft bearing plate; 5. Card connection mechanism; 51. Bearing platform; 52. Card connection groove; 53. Sliding groove; 54. Card connection block. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-Figure 8The present invention provides a technical solution: a frameless motor fixing device for a numerically controlled machine tool, which is arranged in an installation clamping hole 11 opened on a numerically controlled machine tool 1, and an installation groove is opened on the installation clamping hole 11. The size of the installation groove matches the size of the support device 4. The support device 4 is supported in the installation groove to fix the motor housing 3. The installation clamping hole 11 is used to accommodate the entire motor and the motor shaft 2, and the installation groove is used to accommodate the support device 4. After the support device 4 is supported, it is pressed against the installation groove to fix the entire motor, including: a motor shaft 2, a motor housing 3, a support device 4 and a clamping mechanism 5. A bottom plate 31 is provided on the motor housing 3. When the bottom plate 31 is supported by the motor shaft 2 and moves backward, the traction rope 48 can be pulled, thereby the entire support device 4 Pull it up to expand the overall size of the motor housing 3, so that the motor can be fixed in the installation clamping hole 11, the bottom plate 31 is connected to the support device 4, and the bottom plate 31 is connected to the traction rope 48. When the bottom plate 31 moves backward, the support device 4 can be pulled and deformed by the traction rope 48, so that the support device 4 reaches a raised state, so that it can support the installation groove, thereby fixing the non-customized unidirectional inner rotor frameless torque motor. The support device 4 is arranged in the clamping mechanism 5, and the clamping mechanism 5 is used to clamp the support device 4, so as to ensure that the support device 4 will not get loose after installation when the motor is in use. The motor shaft 2 is inserted into the motor housing 3 to push the bottom plate 31, and the bottom plate 31 drives the support device 4 to deform and fix the motor housing 3.

[0022] An installation clamping hole 11 is provided on the CNC machine tool 1, and an installation groove matching the size of the support device 4 is provided inside the installation hole 11. During installation, the motor shaft 2 is first inserted into the motor housing 3, and the bottom plate 31 connected to the motor housing 3 is connected to the support device 4 through a traction rope 48, and the support device 4 is installed in the clamping mechanism 5. Then the motor is placed in the installation clamping hole 11 as a whole, and the motor shaft 2 is pushed to move in the motor housing 3 and support the bottom plate 31. After the bottom plate 31 is stressed, the traction rope 48 is pulled, and the traction rope 48 drives the support device 4 to deform from a contracted state to a raised state, and fits tightly with the installation groove and abuts against the inner wall of the installation groove, thereby fixing the motor housing 3. At the same time, the clamping mechanism 5 clamps the support device 4 to prevent it from loosening. When the motor is powered on, the motor shaft 2 rotates to drive the motor to output power, and the support device 4 maintains the fixed position of the motor to resist vibration and torque. If maintenance is required, first release the clamping of the clamping mechanism 5 on the supporting device 4, move the motor shaft 2 in the opposite direction to restore the supporting device 4 to its initial state, then remove the motor and reinstall it according to the steps after maintenance.

[0023] like Figure 2 , Figure 4 , Figure 7As shown, a connecting rod 312 is provided on the bottom plate 31, and the connecting rod 312 is used to connect the coil 313 and the bottom plate 31 to ensure that the coil 313 can drive the bottom plate 31 to move synchronously toward the motor direction when the magnet 314 attracts the coil 313. The coil 313 is provided on one end of the connecting rod 312. Fig. 9 As shown, when the motor is started, a magnetic field is generated in the motor, and the magnetic field and the coil 313 cut the magnetic flux lines and the Heimback array. The coil 313 generates a magnetic field opposite to the magnet 314, and the magnet 314 attracts the coil 313. The bottom plate 31 has an inward force to squeeze the motor shaft 2 toward the motor housing 3, as shown in FIG. Figure 8 As shown, when the motor is not working, the coil 313 will not generate a magnetic field, and the magnet 314 will still attract the coil 313, but the attraction is not as strong as when the motor is started. It is mainly used to reset the bottom plate 31 and fit it on the motor housing 3. A bearing hole 33 is provided on the motor housing 3, and a magnet 314 is provided at the bottom of the bearing hole 33. The coil 313 is inserted into the bearing hole 33 through a connecting rod 312, and a magnet 314 is provided in the bearing hole 33. The magnet 314 is mainly used to attract the coil 313. The magnet 314 attracts the coil 313 and pulls the bottom plate 31, and the bottom plate 31 limits the motor shaft 2.

[0024] like Figure 7 The bottom plate 31 shown is provided with a connecting rod 312, and the other end of the connecting rod 312 is connected to the coil 313. The motor housing 3 is provided with a bearing hole 33, and a magnet 314 is provided at the bottom of the hole. The coil 313 is inserted into the bearing hole 33 through the connecting rod 312. When the motor is not started, the coil 313 does not generate a magnetic field, and the magnet 314 has a weak attraction to it; after the motor is started, a magnetic field is generated in the motor, and the magnetic field and the coil 313 cut the magnetic flux lines and the Heimbeck array, so that the coil 313 generates a magnetic field opposite to the magnet 314. At this time, the magnet 314 strengthens the attraction of the coil 313, and the bottom plate 31 is pulled through the connecting rod 312. Since the bottom plate 31 is associated with the motor shaft 2, the motor shaft 2 is limited, thereby affecting the state of the shaft when the motor is running, and ensuring the stable operation of the motor.

[0025] like Figure 2 , Figure 4As shown, a plug hole 315 is provided on the base plate 31, and the size of the plug hole 315 matches the size of the plug shaft 22, which is used to allow the plug shaft 22 to be plugged in, so that the connection between the base plate 31 and the motor shaft 2 is in contact at one end of the plug shaft 22, and a plug shaft 22 is provided at one end of the motor shaft 2, and the plug shaft 22 is used to be plugged into the plug hole 315, and is used to position the base plate 31 to prevent the base plate 31 from being offset during operation. The plug shaft 22 is plugged into the plug hole 315, and a pressure bearing 311 is further provided on one side of the base plate 31, and the pressure bearing 311 is used to reduce the friction of the motor shaft 2 to prevent the motor shaft 2 from being worn due to long-term use. The pressure bearing 311 is in contact with one end of the motor shaft 2 to reduce the friction of the base plate 31 on the motor shaft 2.

[0026] like Figure 2 The motor shaft 2 shown is provided with a plug-in shaft 22 at one end, and a plug-in hole 315 of a size matching the plug-in shaft 22 is provided on the bottom plate 31. During installation, the plug-in shaft 22 is inserted into the plug-in hole 315 to achieve the connection between the motor shaft 2 and the bottom plate 31, and at the same time, it plays a role in positioning the bottom plate 31 to prevent the bottom plate 31 from being offset due to force when the motor is working. During the operation of the motor, the motor shaft 2 continues to rotate. Since the bottom plate 31 is closely connected to the motor shaft 2, there is a tendency for relative movement between the two. At this time, the pressure bearing 311 provided on one side of the bottom plate 31 comes into play. It contacts one end of the motor shaft 2, effectively reducing the friction of the bottom plate 31 on the motor shaft 2, avoiding excessive wear of the motor shaft 2 due to long-term use, ensuring that the motor shaft 2 can rotate stably and smoothly, and ensuring the normal operation of the motor.

[0027] As shown in 8, a traction rope 48 included in the support device 4 is connected to the bottom plate 31, one end of the traction rope 48 is connected to the clamping claw 41, and the other end of the traction rope 48 is connected to the bottom plate 31. When the bottom plate 31 moves backward, the traction rope 48 will be pulled to pull the clamping claw 41 to move in the direction of the bottom plate 31, so that the entire support device 4 is subjected to tension, thereby reaching a deformed and raised state. The support device 4 also includes a rotating shaft sleeve 45 connected to one end of the traction rope 48, and the rotating shaft sleeve 45 is used to connect with the first rotating shaft 43, ensuring that the clamping claw 41 can be tightly attached to the clamping mechanism 5 and will not be subjected to the traction force, causing the end of the clamping claw 41 to be out of the control of the clamping mechanism 5. The clamping claw 41 is provided on the rotating shaft sleeve 45, and one end of the clamping claw 41 is set to an oblique surface, so that the clamping block 54 can be better clamped, ensuring that the bottom plate 31 will not naturally return to its initial position after moving backward, resulting in a decrease in the height of the bulge, resulting in the motor housing 3 being unsupported and unsupported during operation. When the connection is unstable, the clamping claw 41 and the clamping mechanism 5 cooperate to clamp, and the supporting device 4 also includes a first rotating shaft 43, a second rotating shaft 44, a third rotating shaft 410 and a fourth rotating shaft 412 arranged on the rotating shaft sleeve 45. The first rotating shaft 43 connects the connecting plate 46 and the clamping claw 41, and the first rotating shaft 43 connects the clamping claw 41 and the connecting plate 46. The function of the connecting plate 46 is to adapt to the angle formed by the traction of the supporting small arm 47 and the clamping claw 41. The second rotating shaft 44 connects the supporting small arm 47 and the clamping claw 41. The supporting arm 47 is connected to the connecting plate 46, and the supporting arm 47 is used to cooperate with the supporting arm 411. The third rotating shaft 410 is raised to support the mounting groove, thereby fixing the entire motor. The third rotating shaft 410 connects the supporting arm 411 and the supporting arm 47, and the fourth rotating shaft 412 connects the supporting arm 411 and the rotating shaft bearing plate 414. The fourth rotating shaft 412 is used to allow the supporting arm 411 to rotate when it can be towed, thereby achieving a state of cooperation with the supporting arm 47.

[0028] like Figure 8The bottom plate 31 is connected to the traction rope 48 in the support device 4, one end of the traction rope 48 is connected to the clamping claw 41, and the other end is connected to the bottom plate 31. When the motor shaft 2 pushes the bottom plate 31 to move backward, the bottom plate 31 pulls the traction rope 48, and then pulls the clamping claw 41 to move toward the bottom plate 31, so that the entire support device 4 is deformed and bulged by tension. The shaft sleeve 45 in the support device 4 is connected to one end of the traction rope 48 and is connected to the first shaft 43 at the same time, ensuring that the clamping claw 41 is close to the clamping mechanism 5 to prevent the end of the clamping claw 41 from being separated from the control of the clamping mechanism 5 due to force. One end of the clamping claw 41 is a beveled surface, which is convenient for tightly clamping with the clamping block 54, preventing the bottom plate 31 from naturally resetting, and ensuring the stable support of the motor housing 3. The first shaft 43 connects the clamping claw 41 and the connecting plate 46, and the connecting plate 46 can adapt to the angle formed by the traction of the supporting arm 47 and the clamping claw 41. The second rotating shaft 44 connects the supporting small arm 47 and the connecting plate 46, and the supporting small arm 47 is connected to the supporting large arm 411 through the third rotating shaft 410. Under the pulling force of the traction rope 48, the supporting small arm 47 and the supporting large arm 411 rotate and bulge with the third rotating shaft 410 as the axis, and fit closely with the installation groove to support and fix the entire motor. The fourth rotating shaft 412 connects the supporting large arm 411 and the rotating shaft bearing plate 414, so that the supporting large arm 411 can rotate when being pulled, and cooperates with the supporting small arm 47 to complete the stable support and fixation of the motor.

[0029] like Figure 6 As shown, the clamping mechanism 5 includes a bearing platform 51 and a clamping groove 52 provided on the motor housing 3, the bearing platform 51 is used to support the rotating shaft bearing plate 414, the rotating shaft bearing plate 414 is used to be connected with the supporting arm 411 through the fourth rotating shaft 412, the fourth rotating shaft 412 is used to ensure that the supporting arm 411 can rotate on the rotating shaft bearing plate 414, the bearing platform 51 is used to fix the rotating shaft bearing plate 414, and a slide groove 53 is also provided in the clamping groove 52, the slide groove 53 is used to accommodate the supporting device 4, and is also used to set a clamping block 54 therein, and the bottom of the clamping mechanism 5 A clamping block 54 is provided in the part, and the clamping block 54 is used to fix the entire supporting device 4 by clamping the clamping claw 41. A limiting rod 42 is provided on the clamping claw 41, and the limiting rod 42 is arranged in the slide groove 53, which is used to limit the clamping claw 41 to prevent the clamping claw 41 from being separated from the clamping groove 52 when being pulled, and not being clamped with the slide groove 53, so as to fail to fix the supporting device 4 in the raised state. The limiting rod 42 is inserted in the slide groove 53 so that the limiting rod 42 can slide in the slide groove 53, and the clamping claw 41 is clamped in the clamping block 54.

[0030] like Figure 6As shown, the clamping mechanism 5 is composed of a bearing platform 51 and a clamping groove 52 provided on the motor housing 3. The bearing platform 51 supports the rotating shaft bearing plate 414, and the rotating shaft bearing plate 414 is connected to the supporting arm 411 through the fourth rotating shaft 412. The fourth rotating shaft 412 enables the supporting arm 411 to rotate on the rotating shaft bearing plate 414, and the bearing platform 51 fixes the rotating shaft bearing plate 414. A sliding groove 53 is provided in the clamping groove 52, which not only accommodates the supporting device 4, but also provides a clamping block 54. The clamping block 54 at the bottom of the clamping mechanism 5 is clamped with the clamping claw 41 to fix the entire supporting device 4. The limiting rod 42 on the engaging claw 41 is located in the slide groove 53. When the supporting device 4 is pulled, the limiting rod 42 slides in the slide groove 53 to limit the position of the engaging claw 41 and prevent it from being separated from the engaging groove 52, thereby ensuring that the engaging claw 41 is stably engaged with the engaging block 54, thereby fixing the supporting device 4 in the raised state and ensuring that the supporting device 4 will not loosen during the operation of the motor, thereby maintaining the stable fixation of the motor.

[0031] like Figure 8 As shown, a sleeve 49 is provided on the supporting arm 47 and the supporting arm 411, and the sleeve 49 is used to limit the traction rope 48 to ensure that the traction rope 48 can be limited by the sleeve 49 when being pulled, and the installation position of the sleeve 49 is at the farthest end of the supporting arm 47 and the supporting arm 411, and the supporting arm 47 and the supporting arm 411 can be raised by pulling, and the sleeve 49 is used to limit the traction rope 48. A through hole 413 is also provided on the supporting arm 411, and the through hole 413 allows the supporting arm 411 to rotate upward better, and the traction rope 48 passes through the through hole 413 and is connected to the bottom plate 31.

[0032] The farthest ends of the supporting small arm 47 and the supporting large arm 411 are both installed with a sliding sleeve 49, through which the traction rope 48 passes. When the bottom plate 31 is forced to move backward and pull the traction rope 48, the sliding sleeve 49 limits the traction rope 48, ensuring that the pulling force direction of the traction rope 48 is stable and transmitted along a predetermined path. Under the pulling force of the traction rope 48, the supporting small arm 47 and the supporting large arm 411 rotate and bulge around the corresponding rotating shaft. A through hole 413 is provided on the supporting large arm 411, and the traction rope 48 passes through the through hole 413 to connect with the bottom plate 31. The through hole 413 provides space for the supporting large arm 411 when it rotates upward, reducing the obstruction of the traction rope 48 to its rotation, so that the supporting large arm 411 can rotate more smoothly, and cooperate with the supporting small arm 47 to complete the support and fixation of the motor.

[0033] The number of the supporting devices 4 and the clamping mechanisms 5 is at least two, specifically fifteen, and they are arranged on the motor housing 3 in a circular array to support and fix the motor housing 3 from all directions.

[0034] A vent hole 32 is formed at one end of the bearing hole 33 , and the vent hole 32 is used for ventilation to the motor housing 3 and for cooling the inside of the motor.

[0035] The motor shaft 2 is provided with a knurled groove 21, which is plugged into the motor housing 3 to enhance the rotation force.

[0036] When the frameless motor fixing device of the numerical control machine tool is used, the installation clamping hole 11 and the mounting groove adapted thereto are opened on the numerical control machine tool 1, the motor shaft 2 is inserted into the motor housing 3, the bottom plate 31 on the motor housing 3 is connected to the support device 4 through the traction rope 48, and the support device 4 is installed on the clamping mechanism 5. During installation, the motor shaft 2 is pushed to support the bottom plate 31, the bottom plate 31 moves backward to pull the traction rope 48, so that the support device 4 changes from contraction to protrusion, and its various components change shape through the shaft connection, and are closely fitted with the mounting groove to fix the motor housing 3. At the same time, the clamping block 54 of the clamping mechanism 5 is clamped with the clamping claw 41, and the limiting rod 42 is limited in the sliding groove 53 to prevent the support device 4 from loosening. In the process of installing the motor shaft 2, the motor housing 3 has been installed in the numerical control machine tool 1, and the sliding sleeve 49 on the supporting small arm 47 and the supporting large arm 411 limits the traction rope 48, and the through hole 413 facilitates the rotation of the supporting large arm 411, and the two cooperate to complete the support. When the motor is running, the motor shaft 2 rotates to output power, and the support device 4 keeps the motor fixed to resist vibration and torque. When the motor starts, the magnetic field inside the motor cuts with the coil 313 to produce an opposite magnetic field. The magnet 314 attracts the coil 313 and pulls the bottom plate 31 through the connecting rod 312 to limit the motor shaft 2; when not started, the magnet 314 weakly attracts the coil 313 to reset the bottom plate 31. The plug-in shaft 22 of the motor shaft 2 is inserted into the plug-in hole 315 of the bottom plate 31 for positioning, and the pressure bearing 311 reduces the friction between the two. The support device 4 and the clamping mechanism 5 are distributed in a circular array to fix the motor. The vent 32 ventilates and cools, and the knurled groove 21 enhances the rotation force of the motor shaft 2.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A frameless motor fixing device for a numerically controlled machine tool, arranged in a mounting clamping hole (11) provided on the numerically controlled machine tool (1), characterized in that: include: A motor shaft (2), a motor housing (3), a supporting device (4) and a clamping mechanism (5); The motor housing (3) is provided with a bottom plate (31), and the bottom plate (31) is connected to the supporting device (4); The supporting device (4) is arranged in the clamping mechanism (5); The motor shaft (2) is inserted into the motor housing (3) to push the bottom plate (31), and the bottom plate (31) drives the support device (4) to deform, thereby fixing the motor housing (3).

2. The frameless motor fixing device for a CNC machine tool according to claim 1, characterized in that: A connecting rod (312) is provided on the bottom plate (31), and a coil (313) is provided on one end of the connecting rod (312); A bearing hole (33) is provided on the motor housing (3), a magnet (314) is provided in the bearing hole (33), the magnet (314) attracts the coil (313) and pulls the bottom plate (31), and the bottom plate (31) limits the motor shaft (2).

3. The frameless motor fixing device for a CNC machine tool according to claim 2, characterized in that: The bottom plate (31) is provided with a plug-in hole (315); A plug-in shaft (22) is provided at one end of the motor shaft (2), and the plug-in shaft (22) is plugged into the plug-in hole (315). A pressure bearing (311) is also provided on one side of the bottom plate (31), and the pressure bearing (311) is in contact with one end of the motor shaft (2) to reduce friction between the bottom plate (31) and the motor shaft (2).

4. A frameless motor fixing device for a CNC machine tool according to claim 2 or 3, characterized in that: The bottom plate (31) is connected to a traction rope (48) included in the support device (4), and the support device (4) further includes a rotating shaft sleeve (45) connected to one end of the traction rope (48), and a clamping claw (41) is provided on the rotating shaft sleeve (45), and the clamping claw (41) and the clamping mechanism (5) are engaged with each other; The supporting device (4) further comprises a first rotating shaft (43), a second rotating shaft (44), a third rotating shaft (410) and a fourth rotating shaft (412) which are arranged on the rotating shaft sleeve (45); The first rotating shaft (43) connects the connecting plate (46) and the clamping claw (41), the second rotating shaft (44) connects the supporting small arm (47) and the connecting plate (46), the third rotating shaft (410) connects the supporting large arm (411) and the supporting small arm (47), and the fourth rotating shaft (412) connects the supporting large arm (411) and the rotating shaft bearing plate (414).

5. The frameless motor fixing device for a CNC machine tool according to claim 4, characterized in that: The clamping mechanism (5) comprises a bearing platform (51) and a clamping groove (52) provided on the motor housing (3); The bearing platform (51) is used to fix the rotating shaft bearing plate (414); A sliding groove (53) is also provided in the clamping groove (52), and a clamping block (54) is provided at the bottom of the clamping mechanism (5); A limit rod (42) is provided on the clamping claw (41), the limit rod (42) is inserted into the sliding groove (53), and the clamping claw (41) is clamped into the clamping block (54).

6. The frameless motor fixing device for a CNC machine tool according to claim 4, characterized in that: The supporting small arm (47) and the supporting large arm (411) are both provided with a sliding sleeve (49), and the sliding sleeve (49) is used to limit the position of the traction rope (48); The supporting arm (411) is also provided with a through hole (413), and the traction rope (48) passes through the through hole (413) and is connected to the bottom plate (31).

7. A frameless motor fixing device for a CNC machine tool according to claim 1 or 5, characterized in that: The number of the supporting devices (4) and the clamping mechanisms (5) is at least two.

8. The frameless motor fixing device for a CNC machine tool according to claim 2, characterized in that: A vent hole (32) is provided at one end of the bearing hole (33), and the vent hole (32) is ventilated into the motor housing (3).

9. A frameless motor fixing device for a CNC machine tool according to claim 1 or 3, characterized in that: The motor shaft (2) is provided with a knurled groove (21), and the knurled groove (21) is inserted into the motor housing (3) to enhance the rotational force.

10. The frameless motor fixing device for a CNC machine tool according to claim 1, characterized in that: The mounting clamping hole (11) is provided with a mounting groove, the size of which matches the size of the supporting device (4), and the supporting device (4) is supported in the mounting groove to fix the motor housing (3).

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