Balanced mute motor

Abstract

The invention discloses a balanced mute motor, which relates to the technical field of motors, and comprises a motor main body which at least comprises a shell, a stator, a rotor I and a rotating shaft, the transfer measuring mechanism is arranged at one end of the inner cavity of the shell and is connected with the rotor I; the adjusting mechanism is connected to the inner wall of the shell; the control unit is electrically connected to the transfer measuring mechanism and the adjusting mechanism, one end of the shell is provided with an opening, the end portion of the rotating shaft is rotationally sleeved with an end cover, the transfer measuring mechanism comprises a transfer assembly, a linkage assembly and a first distance measuring unit, the transfer assembly is arranged in the shell and makes contact with the first rotor, and the linkage assembly is arranged in the shell and makes contact with the second rotor. The linkage assembly is connected with the transferring assembly, and the first distance measuring unit is installed on the inner wall of the shell. According to the invention, the noise generated in the use process of the motor can be reduced.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a balanced silent motor. Background Technology

[0002] Electric motors, as an indispensable component of modern industry and life, are widely used in industrial fields, transportation fields, and home appliance fields.

[0003] During operation, the friction and collision generated by the internal shaft driving the bearings to rotate during motor operation will produce noise. This noise can seriously affect the user experience, especially in some small household appliances.

[0004] To address bearing friction noise, some manufacturers use magnetic levitation technology, such as magnetic bearings, which levitate the rotor via a magnetic field to reduce mechanical contact.

[0005] However, uneven mass distribution (i.e. radial runout) may occur in the motor rotor during manufacturing. Under operating conditions, the rotor with radial runout will still generate noise when rotating at high speed. Therefore, this application proposes a new technical solution. Summary of the Invention

[0006] In order to reduce the noise generated by the motor during use, this application provides a balanced silent motor.

[0007] This application provides a balanced silent motor, which adopts the following technical solution:

[0008] A balanced silent motor, comprising:

[0009] The motor body includes at least a housing and a stator, a rotor, and a shaft located within the housing;

[0010] A transfer measuring mechanism is disposed at one end of the inner cavity of the housing and connected to the rotor, and is used to transfer the rotor and measure its radial runout.

[0011] An adjustment mechanism is attached to the inner wall of the housing and is used to adjust the position of rotor one according to the radial runout of rotor one.

[0012] The control unit is electrically connected to the transfer measuring mechanism and the adjustment mechanism;

[0013] The housing has an opening at one end for inserting a rotating shaft and a rotor. An end cap that fits the cross-section of the opening is rotatably fitted onto the end of the rotating shaft. The transfer and measuring mechanism includes a transfer assembly, a linkage assembly, and a ranging unit. The transfer assembly is located inside the housing and contacts the rotor, used to move the rotor into the housing along its axial direction. The linkage assembly is connected to the transfer assembly and is used to drive the rotor to rotate during movement. The ranging unit is mounted on the inner wall of the housing with its detection end facing the rotor, used to detect the radial runout of the rotor during movement. The control unit is configured as follows:

[0014] If a preset start signal is received, the operation of the transfer component and the linkage component will be controlled.

[0015] Obtain the distance value fed back by the ranging unit 1;

[0016] If the distance value meets the preset rotor radial runout condition, then obtain the current position information of rotor one;

[0017] Based on the current position information of rotor one, the control adjustment mechanism executes the rotor position adjustment command.

[0018] Optionally, the transfer assembly includes a pulley for transferring rotor one, a support rod for supporting the pulley, and a drive component for driving the pulley to rotate. Multiple support rods are provided, located at the opening of the housing and evenly arranged on the inner wall of the housing along the circumference of rotor one. Multiple pulleys are provided, each rotatably connected to one end of the support rod facing the axis of rotor one and abutting against rotor one. The drive component is located on one side of the support rod and connected to the pulley.

[0019] Optionally, the driving component includes a driving chain and a guide rod. The guide rod is fixedly connected to the inner wall of the housing. The guide rod is arranged perpendicular to the axial direction of the housing and is located on the side of the support rod away from the opening. The guide rod has a guide groove along its length on the side facing the opening for the driving chain to slide. The guide rod is located below the pulley.

[0020] A toothed ring is coaxially fixed to the side of the pulley. One end of the drive chain is slidably connected to the guide groove, and the other end passes over the upper part of the pulley and rests on the surface of the support rod. A toothed structure that meshes with the toothed ring is fixedly connected to the side of the drive chain facing the toothed ring.

[0021] An electromagnet is fixed on the inner wall of the housing, and a magnetic component is fixed at the lower end of the drive chain. The electromagnet is connected to the control unit.

[0022] Optionally, the linkage assembly includes a drive wheel for rotating rotor one, a support plate for supporting the drive wheel, and a second gear structure for rotating the drive wheel. Two support plates are provided, which are respectively fixed on the inner wall of the housing and located on both sides of the guide rod. A rotating rod is fixedly passed through the drive wheel along its axial direction, and the two ends of the rotating rod are respectively rotatably connected to the two support plates. The drive wheel and rotor one are in frictional contact with each other. The second gear structure is fixedly connected to the side wall of the drive chain near the drive wheel. A gear disc that meshes with the second gear structure is fixedly sleeved on the rotating rod.

[0023] Optionally, the adjustment mechanism is provided in two sets and located on both sides of the stator respectively. It includes a second rotor connected to the rotating shaft and a stator winding electromagnetically connected to the second rotor. The second rotor is fixedly sleeved on the rotating shaft. An assembly ring is fixedly connected to the inner wall of the housing and is arranged around the second rotor. Multiple stator windings are provided and are evenly distributed on the inner wall of the assembly ring. The stator windings are electrically connected to the control unit.

[0024] The control unit is configured as follows:

[0025] Based on the current position information of rotor one and the distance value fed back by ranging unit one, current parameter data for controlling the current of each stator winding is generated; and the current parameter data is used to control the response of each stator winding.

[0026] Optionally, the end of the inner cavity of the housing is provided with a collaborative monitoring mechanism for verifying the radial runout of rotor one after adjustment. The collaborative monitoring mechanism includes a ball bearing, a contact block, and a second ranging unit for detecting whether the ball bearing is in contact with rotor one.

[0027] Among them, the inner wall of the housing has a magnetic block that slides and rises and falls, which cooperates with the magnetic force of the electromagnet. The abutting block is fixed on the side of the magnetic block facing the rotor. The interior of the abutting block is hollow and has a through-hole on the side facing the rotor. A connecting rod is slidably connected in the inner cavity of the abutting block along the opening direction of its through-hole.

[0028] One end of the connecting rod extends out of the abutment block and has a receiving groove for accommodating the ball bearing. The ball bearing is rotatably connected in the receiving groove and can contact the rotor. The abutment block is connected to a feedback mechanism for feeding back the radial runout of the rotor. The feedback mechanism extends into the inner cavity of the abutment block and is connected to the connecting rod. When the rotor produces radial runout, the feedback mechanism is located on the detection path of the ranging unit.

[0029] The ball bearing surface has multiple recessed holes. The second ranging unit is fixed to the inside of the end cap, and its detection end faces the ball bearing and is used to detect the distance between the ball bearing and the ball bearing. The end cap is provided with a limiting member to restrict the movement of the drive chain. The second ranging unit is electrically connected to the control unit and configured as follows:

[0030] When a signal is received after the adjustment mechanism executes the rotor position adjustment command, the electromagnet is controlled to execute the magnetic block raising command.

[0031] The distance value 2 fed back by the ranging unit 2 is obtained. If the distance value 2 meets the preset condition that the ball and rotor 1 are in contact, the control electromagnet stops responding.

[0032] The distance value fed back by the ranging unit is retrieved to perform radial runout verification analysis, and a matching prompt is output based on the analysis results.

[0033] Optionally, the limiting member is a limiting rod, which is fixedly connected to the inner side of the end cap and arranged along the length direction of the rotating shaft. The magnetic member has a limiting hole for the limiting rod to pass through, and the opening width of the limiting hole is greater than the width of the limiting rod.

[0034] Optionally, the feedback mechanism includes an abutting rod that abuts against the connecting rod and a limiting spring that restricts the movement of the abutting rod. The abutting rod slides through the abutting block, and one end of the abutting rod extending into the abutting block is spherically shaped and abuts against the lower end of the connecting rod, while the other end extends out of the abutting block. A limiting piece is fixedly sleeved on the abutting rod at the position of the abutting rod in the inner cavity of the abutting block. The two ends of the limiting spring are fixed to the limiting piece and the inner wall of the abutting block, respectively. When the rotor 1 generates radial runout, it pushes the connecting rod to move downward, so that the protruding end of the abutting rod is located on the detection path of the ranging unit 1.

[0035] In summary, this application includes the following beneficial technical effects: the transfer assembly for transferring rotor one is set at the opening of the housing, and during the transfer of rotor one, the linkage assembly cooperates with the transfer assembly to drive rotor one to rotate, so that the distance measuring unit one can detect the uniform distribution of rotor one. When rotor one exhibits radial runout, the adjustment mechanism adjusts the offset of rotor one to reduce the shaking of motor operation caused by rotor unevenness, thereby reducing the noise generated during use. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0037] Figure 2 This is a cross-sectional view of the housing according to an embodiment of this application;

[0038] Figure 3This is an exploded view of rotor one according to an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of the transfer component and the linkage component according to an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the structure of the collaborative monitoring mechanism in an embodiment of this application.

[0041] Explanation of reference numerals in the attached drawings: 1. Rotor 1; 11. End cap; 2. Transfer and measuring mechanism; 21. Transfer assembly; 211. Pulley; 212. Support rod; 213. Drive component; 2131. Drive chain; 2132. Magnetic block; 2133. Guide rod; 2134. Guide groove; 2135. Gear ring; 2136. Electromagnet; 2137. Magnetic component; 22. Linkage assembly; 221. Drive wheel; 22 2. Support plate; 223. Gear structure two; 224. Rotating rod; 225. Gear disc; 226. Limiting rod; 3. Adjustment mechanism; 31. Rotor two; 32. Stator winding; 4. Cooperative monitoring mechanism; 41. Ball bearing; 42. Abutting block; 43. Distance measuring unit two; 44. Connecting rod; 45. Feedback mechanism; 451. Abutting rod; 452. Limiting spring; 453. Limiting piece; 5. Distance measuring unit one. Detailed Implementation

[0042] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0043] This application discloses a balanced silent motor.

[0044] Reference Figure 1 , Figure 2 as well as Figure 3 The balanced silent motor includes a motor body and a transfer measuring mechanism 2 and an adjustment mechanism 3 connected to the motor body. The motor body includes at least a housing, a stator, a rotor 1 and a rotating shaft. One end of the housing has an opening for the rotating shaft and rotor 1 to be inserted. The rotor 1 is connected to the rotating shaft and rotatably connected in the inner cavity of the housing. The stator is fixed to the inner wall of the housing by bolts or welding.

[0045] The transfer measuring mechanism 2 is located at one end of the inner cavity of the housing and is connected to the rotor 1. When the rotor 1 is installed on the rotating shaft and inserted into the housing, the transfer measuring mechanism 2 abuts against the rotor 1 and moves the rotor 1 toward the inner cavity of the housing through the transfer measuring mechanism 2, and measures the longitudinal runout of the rotor 1 during the transfer process.

[0046] The adjustment mechanism 3 is connected to the inner wall of the housing, and its position is adjusted by the longitudinal runout of the rotor-1 detected by the transfer measuring mechanism 2 in conjunction with the adjustment mechanism 3.

[0047] Since the shaft is installed by opening an opening at the end of the housing, an end cover 11 is rotatably sleeved at the end of the shaft via a bearing. The end cover 11 can fit into the opening of the housing. When the rotor 1 is transferred by the transfer measuring mechanism 2, the end cover 11 will move toward the inner cavity of the housing. After the shaft and rotor 1 are installed, the end cover 11 is fixed to the housing by bolts.

[0048] The transfer measuring mechanism 2 includes a transfer component 21, a linkage component 22, and a ranging unit 5. The transfer component 21 is disposed on the inner wall of the housing and in contact with the rotor 1, and is used to move the rotor 1 into the housing along the axial direction of the housing. The linkage component 22 is connected to the transfer component 21 and is linked with the transfer component 21 to drive the rotor 1 to rotate during the movement. The ranging unit 5 is installed on the inner wall of the housing and the detection end faces the rotor 1, and is used to detect the radial runout of the rotor 1 during the movement.

[0049] It also includes a control unit electrically connected to the transfer measuring mechanism 2 and the adjustment mechanism 3, and the control unit is configured as follows:

[0050] S1. If a preset start signal is received, control the operation of the transfer component 21 and the linkage component 22.

[0051] Understandably, during motor installation, the control unit connects to the computer via a pre-established communication protocol and sends a start signal to the control unit through a pre-programmed procedure on the computer.

[0052] S2. Obtain the distance value fed back by ranging unit 5;

[0053] It is understandable that distance value one is the distance between ranging unit one 5 and rotor one 1.

[0054] S3. If the distance value meets the preset rotor radial runout condition, then obtain the current rotor-1 position information;

[0055] It is understandable that the preset rotor radial runout condition refers to the situation where rotor 1 exhibits uneven distribution, i.e., the distance value deviates and is not kept constant. The position of rotor 1 can be maintained at a constant speed by controlling the moving speed of rotor 1 driven by the transfer component 21. Based on the action duration of the transfer component 21 and the initial position of rotor 1 at the start of the transfer, the positions of rotor 1 passing through the ranging unit 5 in each time period after the start of the action are calculated. Example:

[0056] If the distance between the end of rotor-1 currently extending into the inner cavity of the housing and the point on the side wall of rotor-1 measured by ranging unit-5 is x, and the speed at which rotor-1 moves toward the inner cavity of the housing under the drive of transfer assembly 21 is y, then the distance k between the point on rotor-1 measured by ranging unit-5 and the end point after t seconds can be obtained as:

[0057]

[0058] Meanwhile, since the linkage component 22 is driven by the transfer component 21 to rotate the rotor 1, the rotation speed of the rotor 1 remains constant. Based on the rotation speed, the position measured by the ranging unit 5 at the beginning, and the moving speed of the rotor 1, the position of the rotor 1 in the ranging unit 5 after rotation can be calculated. By setting an encoder, it can track the target position when the rotor 1 rotates and obtain the rotation angle of the rotor 1 in real time.

[0059] S4. Based on the current position information of rotor 1, control the adjustment mechanism 3 to execute the rotor position adjustment command;

[0060] It is understandable that the rotor position adjustment command refers to the adjustment mechanism 3 tracking and adjusting the target area that is unevenly distributed on rotor 1.

[0061] With the above configuration, the transfer assembly 21 for transferring rotor 1 is located at the opening of the housing. During the transfer of rotor 1, the linkage assembly 22 works in conjunction with the transfer assembly 21 to drive rotor 1 to rotate, so that the distance measuring unit 5 can detect the uniform distribution of rotor 1. When rotor 1 exhibits radial runout, the adjustment mechanism 3 adjusts the offset of rotor 1 to reduce the shaking of the motor caused by uneven rotor operation, thereby reducing the noise generated during use.

[0062] Reference Figure 3 and Figure 4 In one embodiment of this application, the transfer assembly 21 for pushing the rotor 1 includes a pulley 211, a support rod 212 supporting the pulley 211, and a drive member 213. The support rod 212 is provided as multiple rods, which are fixed to the inner wall of the housing by bolts or integral molding. (It should be noted that the multiple support rods 212 are evenly arranged along the axial direction of the rotor 1 to ensure that they can provide stable support for the rotor 1.)

[0063] Multiple pulleys 211 are provided corresponding to the support rod 212, and the multiple pulleys 211 are rotatably connected to one end of the support rod 212 facing the axis of the rotor 1. When the rotor 1 moves in from the opening of the housing, the multiple pulleys 211 abut against the side of the rotor 1 to provide support. At the same time, the pulleys 211 are connected to the drive member 213 provided on one side of the support rod 212. The drive member 213 drives the pulleys 211 to rotate, pushing the rotor 1 toward the inner cavity of the housing.

[0064] Reference Figure 4 In another embodiment of this application, the drive member 213 includes a drive chain 2131 and a guide rod 2133 used as a support. The guide rod 2133 is fixed to the inner wall of the housing by bolts, and the guide rod 2133 is located on the side of the support rod 212 away from the opening of the housing, and the guide rod 2133 is arranged perpendicular to the axial direction of the housing.

[0065] The guide rod 2133 is located on the side facing the opening of the housing and has a guide groove 2134 along its length for the drive chain 2131 to slide. The guide rod 2133 is located below the pulley 211.

[0066] A toothed ring 2135 is coaxially fixed to the side of the pulley 211. One end of the drive chain 2131 is slidably connected to the guide groove 2134, and the other end passes over the upper part of the pulley 211 and rests on the upper surface of the support rod 212. A tooth structure 1 that meshes with the toothed ring 2135 is fixed to the side of the drive chain 2131 facing the toothed ring 2135. Through the interaction between the tooth structure 1 and the toothed ring 2135, the drive chain 2131 can drive the toothed ring 2135 to move together (it should be noted that the drive chain 2131 in this embodiment is a chain structure in the prior art).

[0067] An electromagnet 2136 (in this embodiment, the electromagnet 2136 can be an active electromagnet commonly used for levitation of objects in the prior art) is installed on the inner wall of the housing. A magnetic component 2137 that can be attracted by the electromagnet 2136 is fixed at the lower end of the drive chain 2131. The electromagnet 2136 is electrically connected to the control unit. The magnetic component 2137 is made of ferritic stainless steel in the prior art. It is lightweight and magnetic. When an external magnetic field (such as the N pole or S pole of the magnet) approaches, the originally disordered magnetized regions inside the magnetic component 2137 will be oriented and arranged under the action of the external magnetic field, forming an induced magnetic pole opposite to the magnetic pole of the approaching external magnetic field.

[0068] When rotor 1 needs to be moved into the inner cavity of the housing, the electromagnet 2136 is activated, generating polarity and attracting the magnetic element 2137 to move towards the electromagnet 2136. This causes the drive chain 2131 to rotate through its toothed structure, driving the meshing toothed ring 2135 to rotate, which in turn drives the pulley 211 to rotate, thus pushing rotor 1 into the inner cavity of the housing. It should be noted that before rotor 1 is pushed into the inner cavity of the housing, the drive chain 2131 will not move because the toothed structure on the drive chain 2131 is engaged with the toothed ring 2135 and the pulley 211 does not rotate. Therefore, the initial position of the magnetic element 2137 is located at the upper end of the guide rod 2133.

[0069] Reference Figure 3 and Figure 4 The aforementioned linkage assembly 22, which is used to coordinate the movement of the drive chain 2131 to drive the rotor 1 to rotate, includes a drive wheel 221 for driving the rotor 1 to rotate, a support plate 222 for supporting the drive wheel 221, and a tooth structure 223 for coordinating the rotation of the drive wheel 221.

[0070] Two support plates 222 are provided, and the two support plates 222 are fixed to the inner wall of the housing by bolts. The two support plates 222 are located on both sides of the guide rod 2133, and the two support plates 222 are arranged perpendicular to the axial direction of the housing.

[0071] A rotating rod 224 is fixedly inserted through the drive wheel 221 on its axis. Bearings are installed on the inner walls of the two support plates 222 facing each other, so that the two ends of the rotating rod 224 can be rotatably connected to the support plates 222. The drive wheel 221 abuts against the side of the rotor 1. The rotating rod 224 drives the drive wheel 221 to rotate, thereby driving the rotor 1 to rotate, so that the ranging unit 5 can detect the uneven distribution of the rotor 1.

[0072] The second tooth structure 223 is fixed on the side wall of the drive chain 2131 facing the drive wheel 221. It should be noted that the second tooth structure 223 and the first tooth structure are respectively set on different side walls of the drive chain 2131 so that when the drive chain 2131 moves, it can simultaneously drive the second tooth structure 223 and the first tooth structure to move. A toothed disc 225 is fixedly sleeved on the rotating rod 224, and the toothed disc 225 is meshed with the second tooth structure 223. When the electromagnet 2136 is turned on, it attracts the magnetic element 2137 to move towards it. The magnetic element 2137 drives the entire drive chain 2131 to move downward. Since the second tooth structure 223 is fixed on the side of the drive chain 2131 and meshes with the toothed disc 225, the rotating rod 224 drives the drive wheel 221 to rotate. This achieves the effect of rotating the pulley 211 and driving the rotor 1 to move towards the inner cavity of the housing, while also driving the rotor 1 to rotate.

[0073] Reference Figure 2 and Figure 3 In another embodiment of this application, the adjustment mechanism 3 for improving the radial runout of rotor 1 according to the distribution of rotor 1 is provided in two sets, and is located at both ends of the housing cavity respectively. The adjustment mechanism 3 includes rotor 2 31 and stator winding 32, wherein rotor 2 31 is fixedly sleeved on the end of the rotating shaft so that it can rotate with the rotating shaft.

[0074] An assembly ring is fixed to the inner wall of the housing by bolts, and the assembly ring is sleeved on the outside of the rotor 31. Multiple sets of stator windings 32 are provided, and the multiple sets of stator windings 32 are fixed on the assembly ring and evenly arranged along the rotor 31. When the same current is provided to the stator windings 32, the magnetic force applied to the rotor 31 by the stator windings 32 in each direction is the same.

[0075] In order to control the current passing through each stator winding 32 to adjust the magnitude of the magnetic force applied by each stator winding 32 to the rotor 31 due to the uneven distribution of magnetic force on the rotor 31, it is necessary to track the radial runout of the rotor 31 as it rotates with the shaft, so as to reflect the radial runout of the target rotor 1. The encoder set in the above configuration is used to determine the real-time angle of the target point of the rotor 1 where the magnetic force needs to be applied as it rotates with the shaft.

[0076] Multiple stator windings 32 are electrically connected to the control unit and configured as follows:

[0077] Based on the current position information of rotor 1 and the distance value fed back by ranging unit 5, current parameter data for controlling the current of each stator winding 32 is generated; and each stator winding 32 is controlled to respond based on the current parameter data.

[0078] Understandably, the current control of each stator winding 32 can be achieved by setting a PID controller. This controller is connected to the current in each stator winding 32, decomposing the current through the stator winding 32 into a direct-axis component of the control magnetic field strength and a quadrature-axis component of the control torque. The direct-axis and quadrature-axis components can be calculated using formulas.

[0079]

[0080]

[0081] in, For the direct axis component, For the cross-axis components, The stator current is controlled by a PID controller based on the target value. , And actual current feedback to achieve dynamic adjustment of the current in stator winding 32 (it should be noted that the rotor 31 in this embodiment is set up using magnetic levitation, so only pure radial force is needed, i.e.) ).

[0082] With the above settings, when the ranging unit 5 detects uneven distribution in the rotor 1, the angle of the target point after the rotor 1 is sent into the housing cavity is obtained by the movement of the transfer component 21 and the linkage component 22. This is to control the magnetic force applied by each stator winding 32 to the rotor 31, thereby adjusting the balance of the rotor 1 when it rotates with the shaft and reducing the noise caused by the radial runout of the rotor 1.

[0083] Reference Figure 4 and Figure 5 In one embodiment of this application, in order to observe the radial runout of rotor 1 after adjustment by adjustment mechanism 3, a collaborative monitoring mechanism 4 for verifying the radial runout of rotor 1 after adjustment is provided at the end of the inner cavity of the housing. This allows adjustment mechanism 3 to readjust rotor 1 based on the monitoring results of collaborative monitoring mechanism 4 when the motor is running, so as to ensure that the noise caused by uneven distribution of rotor 1 can be regulated.

[0084] The collaborative monitoring mechanism 4 includes a ball bearing 41, a contact block 42, and a ranging unit 43 for detecting whether the ball bearing 41 is in contact with the rotor 1. A magnetic block 2132, which magnetically engages with the electromagnet 2136, slides and moves up and down on the inner wall of the housing. The contact block 42 is fixed to the side of the magnetic block 2132 facing the rotor 1. The interior of the contact block 42 is hollow and has an opening facing the rotor 1. A connecting rod 44 slides and connects to the inner cavity of the contact block 42 along the opening direction of its opening. (The magnetic block 2132 is a permanent magnet with fixed magnetic poles and a stable magnetic field strength.)

[0085] One end of the connecting rod 44 extends out of the abutment block 42 and has a receiving groove for accommodating the ball 41. The ball 41 is rotatably connected in the receiving groove and can abut against the rotor 1. The abutment block 42 is connected to a feedback mechanism 45 for feeding back the radial runout of the rotor 1. The feedback mechanism 45 extends into the inner cavity of the abutment block 42 and is connected to the connecting rod 44. When the rotor 1 generates radial runout, the feedback mechanism 45 is located on the detection path of the ranging unit 5.

[0086] To facilitate monitoring whether the ball 41 is in contact with the rotor 1, multiple recesses are provided on the surface of the ball 41. A second ranging unit 43 is mounted on the inner wall of the end cover 11, with its detection end facing the ball 41 and used to detect the distance between it and the ball 41. The second ranging unit 43 is electrically connected to the control unit and configured as follows:

[0087] S21. When a signal is received after the adjustment mechanism 3 executes the rotor position adjustment command, the electromagnet 2136 is controlled to execute the command to raise the magnetic block 2132.

[0088] It is understandable that the signal fed back by the adjustment mechanism 3 after executing the rotor position adjustment command can be the high level generated due to the current change after adjusting each group of stator windings 32; the rising command of the magnetic block 2132 refers to adjusting the direction of the current conduction of the electromagnet 2136 so that it generates the same polarity as the end close to the magnetic block, and pushes the magnetic block 2132 toward the rotor 1 through the repulsion of the same level.

[0089] S22. Obtain the distance value 2 fed back by the ranging unit 2 43. If the distance value 2 meets the preset condition that the ball 41 and the rotor 1 are in contact, then control the electromagnet 2136 to stop responding.

[0090] It is understandable that the preset condition for the ball 41 to contact the rotor 1 means that the ball 41 and the rotor 1 are in contact.

[0091] S23. Retrieve the distance value fed back by the ranging unit 5 and perform radial runout verification analysis. Output matching prompts based on the analysis results.

[0092] It is understandable that when rotor 1 experiences radial runout, the connecting rod 44 will be inserted into the inner cavity of the abutment block 42 and act on the feedback mechanism 45, so that the feedback mechanism 45 is on the detection path of the ranging unit 5. That is, if the distance value fed back by the ranging unit 5 is the distance between it and the feedback mechanism 45, it indicates that rotor 1 has experienced radial runout. The matching prompt output can be the flashing of an indicator light pre-installed on the outside of the motor housing.

[0093] With the above settings, if the rotor 1 still has longitudinal runout, the side of the rotor 1 will contact the ball 41 that is rolled and connected to the abutment block 42 when it rotates, and push the connecting rod 44 into the inner cavity of the abutment block 42. At the same time, it will drive the feedback mechanism 45 connected to it to provide feedback, so as to adjust the radial runout of the rotor 1 through the adjustment mechanism 3.

[0094] Reference Figure 3 In order to prevent the magnetic component 2137 from being attracted and causing the drive chain 2131 to move during the process of the electromagnet 2136 pushing the magnetic block 2132, and thus the drive chain 2131 from falling off, a limiting component is provided on the end cover 11 to restrict the movement of the drive chain 2131.

[0095] The limiting component is a limiting rod 226, which is installed on the inner side of the end cover 11 and extends along the length of the rotating shaft. The magnetic component 2137 has a limiting hole for the limiting rod 226 to pass through. When the rotor 1 moves into the inner cavity of the housing through the transfer assembly 21, it drives the end cover 11 to move, causing the limiting rod 226 to move toward the inner cavity of the housing. At the same time, the magnetic component 2137 moves downward under the attraction of the electromagnet 2136. It should be noted that the limiting hole is rectangular and the opening width of the limiting hole is greater than the width of the limiting rod 226 to ensure that the limiting rod 226 can be inserted into the limiting hole.

[0096] Reference Figure 5 The feedback mechanism 45 for the radial runout of the rotor 1 includes an abutting rod 451 that abuts against the connecting rod 44 and a limiting spring 452 that restricts the movement of the abutting rod 451. The abutting rod 451 slides through the abutting block 42, and one end of the abutting rod 451 that extends into the abutting block 42 is spherically shaped and abuts against the lower end of the connecting rod 44. The other end of the abutting rod 451 extends out of the abutting block 42.

[0097] The abutting rod 451 is fixedly fitted with a limiting piece 453 at the position of the abutting block 42. The two ends of the limiting spring 452 are fixed to the limiting piece 453 and the inner wall of the abutting block 42, respectively. The limiting piece 453 is pushed by the elastic force of the limiting spring 452, so that the abutting rod 451 extends into the inner cavity of the abutting block 42 and abuts against the connecting rod 44, so as to prevent the connecting rod 44 from sliding into the inner cavity of the abutting block 42, thus playing a limiting role.

[0098] When rotor 1 exhibits radial runout and presses against ball 41, the connecting rod 44 is pushed into the inner cavity of the abutment block 42, causing the connecting rod 44 to push the abutment rod 451 out of the inner cavity of the abutment block 42, placing it on the detection path of the ranging unit 5. That is, when the ranging unit 5 detects the abutment rod 451, it indicates that rotor 1 has exhibited radial runout.

[0099] When feedback is not required through the feedback mechanism 45, the abutment rod 451 extends into the inner cavity of the abutment block 42 under the elastic force of the limiting spring 452, which will not affect the detection of the distance measuring unit-5 when it extends into the rotor-1, and abuts against the connecting rod 44, restricting the movement of the connecting rod 44.

[0100] The implementation principle of this embodiment is as follows: The rotating shaft with rotor 1 is inserted into the opening of the housing and abuts against the pulley 211. By activating the electromagnet 2136, it attracts the magnetic component 2137, which drives the drive chain 2131 to move toward the electromagnet 2136. During the movement, the pulley 211 rotates through the meshing connection between the tooth structure and the tooth ring 2135, sending rotor 1 into the inner cavity of the housing.

[0101] Meanwhile, as the drive chain 2131 moves toward the electromagnet 2136, the tooth structure 223 on one side of the drive chain 2131 meshes with the toothed disc 225, causing the toothed disc 225 to drive the drive wheel 221 to rotate. Since the drive wheel 221 abuts against the rotor 1, the rotor 1 rotates as it moves into the housing. The distance between the rotor 1 and the side wall of the rotor 1 is detected by the ranging unit 5 located on the inner wall of the housing. By comparing the change in the distance value detected by the ranging unit 5 during the movement of the rotor 1, it is determined whether the rotor 1 has an uneven distribution problem (specifically, the rotor 1 exhibits radial runout).

[0102] When uneven distribution is detected in rotor-1, the location of uneven distribution is determined by the speed of rotor-1's movement, the speed of rotation, and the initial position detected by the ranging unit-5. The location is tracked by the encoder, and the current of each group of stator windings 32 is adjusted in real time by the PID controller to follow the movement of uneven points of rotor-1 and make fine adjustments.

[0103] After rotor 1 extends into the inner cavity of the housing, the current flowing through electromagnet 2136 is controlled to generate a repulsive polarity between the magnetic blocks 2132 on the side of electromagnet 2136 facing the magnetic blocks 2132. This pushes the magnetic blocks 2132 toward rotor 1. When the ball bearing 41 comes into contact with rotor 1, if radial runout occurs, it will push the connecting rod 44 into the contact block 42 during rotation and drive the contact rod 451 to extend outward toward the contact block 42, so that the detection end of the ranging unit 5 can detect it. The current of each stator winding 32 is then adjusted to further adjust the uneven distribution of rotor 1, thereby reducing the noise generated by the motor during use.

[0104] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A balanced silent motor, characterized in that, include: The motor body includes at least a housing and a stator, a rotor (1) and a shaft located within the housing; The transfer measuring mechanism (2) is located at one end of the inner cavity of the housing and connected to the rotor (1), and is used to transfer the rotor (1) and measure its radial runout. Adjustment mechanism (3), which is connected to the inner wall of the housing and is used to adjust the position of rotor (1) according to the radial runout of rotor (1); The control unit is electrically connected to the transfer measuring mechanism (2) and the adjustment mechanism (3). The housing has an opening at one end for inserting the rotating shaft and rotor (1). The end of the rotating shaft is fitted with an end cap (11) that matches the cross-section of the opening. The transfer measuring mechanism (2) includes a transfer assembly (21), a linkage assembly (22), and a distance measuring unit (5). The transfer assembly (21) is located inside the housing and contacts the rotor (1), and is used to move the rotor (1) into the housing along the axial direction of the housing. The linkage assembly (22) is connected to the transfer assembly (21) and is used to drive the rotor (1) to rotate during the movement in conjunction with the transfer assembly (21). The distance measuring unit (5) is installed on the inner wall of the housing with its detection end facing the rotor (1), and is used to detect the radial runout of the rotor (1) during the movement. The control unit is configured as follows: If a preset start signal is received, the operation of the transfer component (21) and the linkage component (22) will be controlled. Obtain the distance value fed back by the ranging unit (5); If the distance value meets the preset rotor radial runout condition, then obtain the position information of the current rotor (1); Based on the current position information of rotor 1 (1), the control adjustment mechanism (3) executes the rotor position adjustment command.

2. The balanced silent motor according to claim 1, characterized in that: The transfer assembly (21) includes a pulley (211) for transferring rotor one (1), a support rod (212) for supporting the pulley (211), and a drive member (213) for driving the pulley (211) to rotate. There are multiple support rods (212), which are located at the opening of the housing and are evenly arranged on the inner wall of the housing along the circumference of rotor one (1). There are multiple pulleys (211), which are rotatably connected to one end of the support rod (212) facing the axis of rotor one (1) and abut against rotor one (1). The drive member (213) is located on one side of the support rod (212) and connected to the pulley (211).

3. The balanced silent motor according to claim 2, characterized in that: The driving component (213) includes a driving chain (2131) and a guide rod (2133). The guide rod (2133) is fixedly connected to the inner wall of the housing. The guide rod (2133) is arranged perpendicular to the axial direction of the housing and is located on the side of the support rod (212) away from the opening. The guide rod (2133) has a guide groove (2134) along its length direction on the side facing the opening for the driving chain (2131) to slide. The guide rod (2133) is located below the pulley (211). A toothed ring (2135) is coaxially fixed to the side of the pulley (211). One end of the drive chain (2131) is slidably connected to the guide groove (2134), and the other end passes over the upper part of the pulley (211) and rests on the upper surface of the support rod (212). A toothed structure that meshes with the toothed ring (2135) is fixedly connected to the side of the drive chain (2131) facing the toothed ring (2135). An electromagnet (2136) is fixed on the inner wall of the housing, and a magnetic component (2137) is fixed at the lower end of the drive chain (2131). The electromagnet (2136) is connected to the control unit.

4. The balanced silent motor according to claim 3, characterized in that: The linkage assembly (22) includes a drive wheel (221) for driving the rotor (1) to rotate, a support plate (222) for supporting the drive wheel (221), and a gear structure (223) for driving the drive wheel (221) to rotate. There are two support plates (222), which are fixed on the inner wall of the housing and located on both sides of the guide rod (2133). The drive wheel (221) is fixedly provided with a rotating rod (224) along its axial direction, and the two ends of the rotating rod (224) are rotatably connected to the two support plates (222). The drive wheel (221) and the rotor (1) are in frictional contact with each other. The gear structure (223) is fixedly connected to the side wall of the drive chain (2131) near the drive wheel (221). A gear disc (225) that meshes with the gear structure (223) is fixedly sleeved on the rotating rod (224).

5. The balanced silent motor according to claim 4, characterized in that: The adjustment mechanism (3) is provided in two sets and located on both sides of the stator respectively. It includes a rotor (31) connected to the rotating shaft and a stator winding (32) electromagnetically connected to the rotor (31). The rotor (31) is fixedly sleeved on the rotating shaft. An assembly ring is fixedly connected to the inner wall of the housing and is arranged around the rotor (31). There are multiple stator windings (32) and multiple stator windings (32) are evenly distributed on the inner wall of the assembly ring. The stator windings (32) are electrically connected to the control unit. The control unit is configured as follows: Based on the current position information of rotor 1 (1) and the distance value fed back by ranging unit 1 (5), current parameter data for controlling the current of each stator winding (32) is generated; based on the current parameter data, each stator winding (32) is controlled to respond.

6. The balanced silent motor according to claim 5, characterized in that: The end of the inner cavity of the housing is provided with a collaborative monitoring mechanism (4) for verifying the radial runout of rotor 1 (1) after adjustment. The collaborative monitoring mechanism (4) includes a ball (41), a contact block (42), and a distance measuring unit 2 (43) for detecting whether the ball (41) is in contact with rotor 1 (1). Among them, the inner wall of the shell has a magnetic block (2132) that is magnetically engaged with the electromagnet (2136). The abutment block (42) is fixed on the side of the magnetic block (2132) facing the rotor (1). The interior of the abutment block (42) is hollow and has an opening on the side facing the rotor (1). A connecting rod (44) is slidably connected in the inner cavity of the abutment block (42) along the opening direction of its opening. One end of the connecting rod (44) extends out of the abutment block (42) and has a receiving groove for receiving the ball (41). The ball (41) is rolled in the receiving groove and can contact the rotor (1). The abutment block (42) is connected to a feedback mechanism (45) for feeding back the radial runout of the rotor (1). The feedback mechanism (45) extends into the inner cavity of the abutment block (42) and is connected to the connecting rod (44). When the rotor (1) generates radial runout, the feedback mechanism (45) is located on the detection path of the ranging unit (5). The ball (41) has multiple recessed holes on its surface. The second measuring unit (43) is fixed to the inside of the end cap (11), and the detection end of the second measuring unit (43) faces the ball (41) and is used to detect the distance between the ball (41). The end cap (11) is provided with a limiting member for restricting the movement of the drive chain (2131). The second measuring unit (43) is electrically connected to the control unit and configured as follows: When the signal is received after the adjustment mechanism (3) executes the rotor position adjustment command, the control electromagnet (2136) executes the command to raise the magnetic block (2132); If the distance value two fed back by the ranging unit two (43) meets the preset condition that the ball (41) and the rotor one (1) are in contact, then the control electromagnet (2136) stops responding. The distance value fed back by the ranging unit (5) is retrieved for radial runout verification analysis, and a matching prompt is output based on the analysis results.

7. The balanced silent motor according to claim 6, characterized in that: The limiting component is a limiting rod (226), which is fixedly connected to the inner side of the end cap (11) and is arranged along the length direction of the rotating shaft. The magnetic component (2137) has a limiting hole for the limiting rod (226) to pass through, and the opening width of the limiting hole is greater than the width of the limiting rod (226).

8. The balanced silent motor according to claim 6, characterized in that: The feedback mechanism (45) includes an abutting rod (451) that abuts against the connecting rod (44) and a limiting spring (452) that restricts the movement of the abutting rod (451). The abutting rod (451) slides through the abutting block (42), and one end of the abutting rod (451) that extends into the abutting block (42) is spherically shaped and abuts against the lower end of the connecting rod (44), while the other end extends out of the abutting block (42). A limiting piece (453) is fixedly sleeved on the position of the abutting rod (451) in the inner cavity of the abutting block (42). The two ends of the limiting spring (452) are fixed to the limiting piece (453) and the inner wall of the abutting block (42) respectively. When the rotor (1) generates radial runout, it pushes the connecting rod (44) to move downward, so that the extended end of the abutting rod (451) is located on the detection path of the ranging unit (5).

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