Permanent magnet servo motor damping structure

Abstract

The utility model discloses a permanent magnet servo motor damping structure which comprises a casing and further comprises a main shaft concentricity anti-polarization assembly, the main shaft concentricity anti-polarization assembly comprises NS permanent magnets installed on the inner wall of the casing in an array mode, a first bearing is fixedly installed on the inner sides of the NS permanent magnets, a main shaft is rotatably installed in the first bearing, and a second bearing is fixedly installed on the inner side of the main shaft. A module is arranged on the periphery of the main shaft, a coil is wound on the surface of the module, a shaft shoulder is arranged on the surface of the main shaft and located between the coil and the first bearing, a front cover is installed on one side of the machine shell in a butt joint mode, a buffer ring is installed in the front cover in an inserted mode, and a rear cover is arranged on the other side of the machine shell. According to the main shaft concentricity anti-polarization assembly, the main shaft which is prone to generating eccentricity with the magnetic ring in the rotating process is positioned and installed in the magnetic ring through the bearing, namely, the axis of the main shaft is positioned at a specific position. According to the device, the problem that the whole machine body vibrates due to polarization generated by various problems such as current fluctuation can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of permanent magnet servo motors, in particular to a shock absorption structure for a permanent magnet servo motor. Background Art

[0002] A permanent magnet servo motor is a high-performance motor that combines the high efficiency of a permanent magnet motor and the precise control characteristics of a servo motor. It is widely used in industrial automation, robotics, precision machining, aerospace, medical devices, and other fields that require high-precision positioning and dynamic response. Due to its high efficiency, high precision, and fast response characteristics, permanent magnet servo motors are widely used in industrial automation, precision machinery, robot joints, medical equipment, aerospace, and other fields. With the development of Industry 4.0 and intelligent manufacturing, the demand for permanent magnet servo motors continues to grow, becoming a key component for achieving high-precision automatic control.

[0003] Chinese invention patent with application number CN213027685U discloses a shock absorption structure for a servo motor. The patent includes a base, a mounting plate, a servo motor, fixed rods, bolts, sleeves, connecting rods, springs, mounting blocks, and sliders; the mounting blocks are connected to the base, and chutes are respectively provided on the mutually remote side end faces of the mounting blocks, and a second groove is provided on the upper end face of the mounting block; the two ends of the spring are respectively connected to the bottom surface of the second groove and the sleeve; the sleeve is connected to the mounting plate; the two ends of each group of connecting rods are respectively movably connected to the lower end face of the mounting plate and a group of sliders; the sliders are slidably connected to the chutes; the servo motor is mounted on the mounting plate; one end of each group of fixed rods is movably connected to the mounting plate, and multiple groups of threaded holes are provided on each group of fixed rods; multiple groups of bolts are respectively screwed into the multiple groups of threaded holes, and the multiple groups of bolts press the servo motor towards the servo motor; a fixing component for fixing the other end of the fixed rod is provided on the mounting plate. The utility model shocks and absorbs the servo motor, and fixes and protects the motor, improving the practicability of the servo motor.

[0004] The existing servo permanent magnet motors mainly buffer the main body of the motor by means of an external buffer device. However, the root cause of the motor vibration is the polarization caused by the reduction of the concentricity between the motor spindle and the permanent magnet, and this polarization will drive the entire motor housing to vibrate; if only a shock-absorbing base is simply installed on the surface of the housing, only the amplitude of the vibration can be reduced, but the occurrence of vibration cannot be avoided from the source, so the shock-absorbing effect is limited. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the deficiencies existing in the prior art, and a shock absorption structure for a permanent magnet servo motor is proposed.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A shock-absorbing structure for a permanent magnet servo motor, including a housing, further including:

[0008] A spindle concentricity anti-polarization component, which includes NS permanent magnets array-mounted on the inner wall of the housing. A first bearing is fixedly installed inside the NS permanent magnets. A spindle is rotatably installed inside the first bearing. A module is arranged around the spindle, and a coil is wound and installed on the surface of the module. A shoulder is arranged on the surface of the spindle between the coil and the first bearing. A front cover is butt-jointed and installed on one side of the housing, a buffer ring is inserted and installed inside the front cover, and a rear cover is arranged on the other side of the housing.

[0009] In a further technical solution, the buffer ring is sleeved and installed on the surface of the spindle. An end cover is arranged at the end of the front cover, and a second bearing is arranged inside the end cover. The spindle is inserted and installed inside the second bearing.

[0010] In a further technical solution, a key is arranged on one side of the spindle.

[0011] In a further technical solution, it further includes:

[0012] An auxiliary shock-absorbing component, which includes a rotating rod connected and installed on one side of the spindle. A tripod is arranged at the end of the rotating rod, and a balance ring is fixed around the tripod.

[0013] In a further technical solution, the auxiliary shock-absorbing component further includes a buffer seat installed at the bottom of the housing, and the contact surface between the buffer seat and the housing is made of an elastic material.

[0014] In a further technical solution, air holes are arranged in an array on the surface of the rear cover.

[0015] In a further technical solution, the shape and structure of the module are consistent with the NS permanent magnet at the corresponding position.

[0016] Compared with the prior art, the present utility model provides a shock-absorbing structure for a permanent magnet servo motor, having the following beneficial effects:

[0017] Through the arranged spindle concentricity anti-polarization component, the spindle that is prone to eccentricity problems with the magnetic ring during the rotation process is positioned and installed inside the magnetic ring through bearings, that is, the axis of the spindle is positioned at a specific position. This device can avoid polarization caused by various problems such as current fluctuations, and further avoid the problem of vibration of the entire fuselage.

[0018] Through the arranged external shock-absorbing component, the resonance problem caused by traditional spring shock absorption is avoided. The balance ring butt-jointed and installed on the spindle can increase the balance inertia of the spindle. This structure enables the spindle to reduce the vibration amplitude even if vibration occurs due to excessive inertia. Description of the Drawings

[0019] Figure 1Structural schematic diagram of a shock-absorbing structure for a permanent magnet servo motor proposed by the present utility model;

[0020] Figure 2 Structural schematic diagram of an exploded view of the main body of a shock-absorbing structure for a permanent magnet servo motor proposed by the present utility model;

[0021] Figure 3 Structural schematic diagram of a cross-section of the main body of a shock-absorbing structure for a permanent magnet servo motor proposed by the present utility model;

[0022] Figure 4 Structural schematic diagram of a rear view of a shock-absorbing structure for a permanent magnet servo motor proposed by the present utility model.

[0023] In the figure: 1, housing; 2, spindle concentricity anti-polarization component; 3, auxiliary shock-absorbing component; 4, NS permanent magnet; 5, first bearing; 6, spindle; 7, coil; 8, shaft shoulder; 9, front cover; 10, buffer ring; 11, end cover; 12, second bearing; 13, key; 14, rear cover; 15, rotating rod; 16, tripod; 17, balance ring; 18, buffer seat; 19, module; 20, air hole. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0025] Embodiment 1: Refer to Figure 1 - Figure 4 , a shock-absorbing structure for a permanent magnet servo motor, including a housing 1, and the housing 1 is the main body housing of this motor. It also includes:

[0026] A spindle concentricity anti-polarization component 2, which can avoid the vibration problem caused by eccentric rotation of the spindle 6 during rotation. The spindle concentricity anti-polarization component 2 includes NS permanent magnets 4 arrayed and installed on the inner wall of the housing 1, and the NS permanent magnets 4 are the permanent magnets of this device. A first bearing 5 is fixedly installed inside the NS permanent magnets 4. The function of the first bearing 5 is to position the spindle 6 inside the NS permanent magnets 4, thereby avoiding the spindle 6 from jumping. A spindle 6 is rotatably installed inside the first bearing 5. A module 19 is arranged around the spindle 6, and the function of the module 19 is to wind the coil 7. A coil 7 is wound and installed on the surface of the module 19. A shaft shoulder 8 is arranged on the surface of the spindle 6 between the coil 7 and the first bearing 5, and the function of the shaft shoulder 8 is to limit the coil 7 and the first bearing 5. A front cover 9 is butt-joint installed on one side of the housing 1, and a buffer ring 10 is inserted and installed inside the front cover 9. The buffer ring 10 is used to directly contact the spindle 6 and buffer it. A rear cover 14 is arranged on the other side of the housing 1.

[0027] A shock-absorbing structure for a permanent magnet servo motor, in which a buffer ring 10 is sleeved and installed on the surface of a main shaft 6. An end cover 11 is provided at the end of a front cover 9, and a second bearing 12 is arranged inside the end cover 11. The function of the second bearing 12 is to drive the main shaft 6; the main shaft 6 is inserted and installed inside the second bearing 12.

[0028] A shock-absorbing structure for a permanent magnet servo motor, in which a key 13 is arranged on one side of the main shaft 6. The function of the key 13 is for a component externally connected to the main shaft 6.

[0029] A shock-absorbing structure for a permanent magnet servo motor further includes:

[0030] An auxiliary shock-proof component 3, which includes a rotating rod 15 connected and installed on one side of the main shaft 6. The rotating rod 15 and a tripod 16 are used to connect and fix a balance ring 17; a tripod 16 is arranged at the end of the rotating rod 15, and a balance ring 17 is fixed around the tripod 16. The balance ring 17 is used to increase the inertia of the main shaft 6, thereby avoiding the problem of excessive vibration amplitude.

[0031] A shock-absorbing structure for a permanent magnet servo motor, the auxiliary shock-proof component 3 further includes a buffer seat 18 installed at the bottom of the machine shell 1. The buffer material inside the buffer seat 18 is used to assist in buffering the motor. The contact surface between the buffer seat 18 and the machine shell 1 is made of an elastic material.

[0032] A shock-absorbing structure for a permanent magnet servo motor, in which air holes 20 are arranged in an array on the surface of a rear cover 14. The air holes 20 are a structure for heat dissipation of this product.

[0033] A shock-absorbing structure for a permanent magnet servo motor, the shape and structure of a module 19 are consistent with those of an NS permanent magnet 4 at a corresponding position, so that an alternating magnetic field is generated when a coil 7 is energized, thereby pulling the main shaft 6 to rotate.

[0034] In the actual design process of the present utility model, in order to avoid the following technical defects existing in the prior art: "The servo permanent magnet motor in the prior art mainly uses an externally connected buffer device to buffer the main body of the motor. However, the root cause of the motor vibration is the polarization caused by the reduction of the concentricity between the motor main shaft and the permanent magnet, and this polarization will drive the entire motor housing to vibrate; if only a shock-absorbing base is simply installed on the surface of the machine shell, only the amplitude of the vibration can be reduced, but the occurrence of vibration cannot be avoided from the source, so the shock-absorbing effect is limited." The main shaft concentricity anti-polarization component 2 and the auxiliary shock-proof component 3 are specifically proposed.

[0035] During use, shoulders 8 are provided at different parts of the main shaft 6 for rotation. The shoulders 8 can divide the main shaft 6 into different intervals. The first bearings 5 are sleeved and installed in different intervals respectively. The inner ring and outer ring of the first bearings 5 respectively abut against the outer ring of the main shaft 6 and the inner wall of the NS permanent magnet 4 to achieve the positioning and centering effect of the main shaft 6, and avoid the motor vibration caused by eccentric rotation of the main shaft due to various reasons such as current fluctuations and external vibrations. The module 19 on the surface of the main shaft 6 is a component for supporting and forming the coil 7. After the coil 7 is energized, a magnetic field that continuously intersects with the NS permanent magnet 4 will be generated, and then a torque will be generated at the main shaft 6 due to the action of the magnetic field to achieve the rotation effect of the motor. The NS permanent magnet 4 and the coil 7 are both set as corresponding circular structures, which can ensure the concentricity of the rotor of this device. At the same time, in order to increase the shock absorption effect of the casing, a buffer ring 10 is inserted and installed inside the front cover 9. The buffer ring 10 can directly buffer the main shaft 6 and avoid the problem of the device being too large caused by external connection;

[0036] To further increase the buffering effect, a balance ring 17 is connected and installed on one side of the main shaft 6 through a rotating rod 15 and a tripod 16. The balance ring 17 is a circumferentially symmetric structure, which can increase the buffering inertia of the main shaft 6 on the circumference, so that even if the main shaft 6 inevitably vibrates, it will not cause the problem of excessive vibration amplitude. The buffer seat 18 provided at the bottom of the fuselage is used to directly buffer the fuselage and avoid the resonance problem caused by spring buffering.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. The above is only the preferred specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered within the protection scope of the present utility model.

Claims

1. A permanent magnet servo motor damping structure, comprising a housing (1), characterized in that: Also includes: A spindle concentricity anti-polarization component (2), the spindle concentricity anti-polarization component (2) comprising an array of NS permanent magnets (4) mounted on the inner wall of a housing (1), a first bearing (5) being fixedly mounted on the inner side of the NS permanent magnet (4), a spindle (6) being rotatably mounted inside the first bearing (5), a module (19) being arranged around the periphery of the spindle (6), a coil (7) being wound around the surface of the module (19), a shaft shoulder (8) being arranged on the surface of the spindle (6) between the coil (7) and the first bearing (5), a front cover (9) being butt-jointedly mounted on one side of the housing (1), a buffer ring (10) being plugged and mounted inside the front cover (9), and a rear cover (14) being arranged on the other side of the housing (1).

2. A permanent magnet servo motor damping structure according to claim 1, characterized in that: The buffer ring (10) is sleeve-mounted on the surface of the main shaft (6); an end cover (11) is provided at the end of the front cover (9); a second bearing (12) is provided inside the end cover (11); and the main shaft (6) is plug-mounted inside the second bearing (12).

3. A permanent magnet servo motor damping structure according to claim 2, characterized in that: A key (13) is provided on one side of the main shaft (6).

4. The permanent magnet servo motor damping structure according to claim 1, characterized in that: Also includes: An auxiliary anti-vibration component (3), the auxiliary anti-vibration component (3) comprising a rotating rod (15) connected and mounted on one side of the main shaft (6), a tripod (16) being arranged at the end of the rotating rod (15), and a balancing ring (17) being fixed around the periphery of the tripod (16).

5. A permanent magnet servo motor damping structure according to claim 4, characterized in that: The auxiliary anti-vibration component (3) further comprises a buffer seat (18) mounted on the bottom of the housing (1), and the contact surface between the buffer seat (18) and the housing (1) is made of elastic material.

6. The permanent magnet servo motor damping structure according to claim 1, characterized in that: The surface array of the back cover (14) is provided with air holes (20).

7. The permanent magnet servo motor damping structure according to claim 1, characterized in that: The shape and structure of the module (19) are consistent with the NS permanent magnet (4) at the corresponding position.

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