Staggered pole rotor structure of servo motor and assembling method

Abstract

The invention discloses a staggered pole rotor structure of a servo motor and an assembly method, and relates to the technical field of motors. By arranging the staggered-pole rotor heat dissipation mechanism, an oil pumping assembly in the staggered-pole rotor heat dissipation mechanism can convey cooled heat-conducting oil into a heat-conducting oil main pipe, so that heat exchange is performed between the heat-conducting oil and air in a shell, and the temperature of the working environment of a coil winding is reduced; the oil return assembly can quickly suck the heat-conducting oil subjected to heat exchange into the oil return assembly, so that the effect of continuously and circularly flowing the heat-conducting oil is achieved, the heat in the shell is continuously taken away, and the purpose of efficient cooling is achieved; compared with a traditional mode of directly blowing air to the rotor, the environment where the rotor is located can be relatively sealed, influences of external dust, moisture and the like on the interior of the motor are reduced, therefore, the rotor is effectively protected, the rotor is prevented from being damaged in the cooling process, the heat conduction oil has high heat conductivity and specific heat capacity, and the service life of the rotor is prolonged. And heat in the motor can be quickly and effectively led out.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a staggered-pole rotor structure and an assembly method of a servo motor. Background Art

[0002] The staggered pole rotor structure, also known as the skewed pole or skewed slot structure, is a technical means to optimize the motor performance by changing the arrangement of the rotor core or permanent magnets. In this structure, the rotor core is often divided into several equal sections. After each section is equipped with permanent magnets, the core sections are staggered at a certain angle and fixed to the rotor shaft, thereby achieving an effect similar to the skewed pole.

[0003] At present, the rotor structure of the servo motor will generate significant heat during operation. In order to effectively manage this heat, a common heat dissipation strategy is to install fan blades at the end of the shaft to accelerate the air flow through the rotation of the fan blades, thereby achieving the purpose of heat dissipation and cooling.

[0004] Referring to the rotor structure of the permanent magnet synchronous servo motor disclosed in the patent application with reference to publication number CN216414099U, the third gear is driven to rotate by the first gear. When the third gear drives the second gear to rotate, the rotation speed of the first rotating rod will increase, thereby accelerating the rotation of the fan blades, thereby increasing the heat dissipation capacity. When the outside temperature is high, the fan blades blow air to the heat sink to absorb heat and enter the blow pipe through the first vent. Finally, the second vent blows out cool air for heat dissipation. Because the size of the second vent is smaller than that of the first vent, a small throttling effect can be generated, thereby causing the temperature near the second vent to drop and increasing the heat dissipation effect. It is easy to use and simple to operate, can effectively increase the rotation speed of the fan blades, and can effectively dissipate the hot air when the outside temperature is high to achieve the heat dissipation effect, thereby increasing the service life of the rotor body.

[0005] A comprehensive analysis of the above patents reveals the following defects:

[0006] In the above patent, the purpose of heat dissipation is achieved by using fan blades to speed up the air flow rate. However, the thermal performance of air is relatively poor, resulting in a low convective heat transfer coefficient. When the motor is running at high load, air cooling cannot meet the heat dissipation requirements, resulting in excessively high equipment temperature, affecting performance and life; secondly, the friction during the transmission of multiple gears will increase the loss of rotor kinetic energy, thereby increasing the operating load and power consumption of the motor, which is not conducive to the kinetic energy output of the motor.

[0007] Therefore, the present invention proposes a staggered-pole rotor structure and an assembly method for a servo motor to solve the above-mentioned problem. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a staggered-pole rotor structure and assembly method for a servo motor, which solves the problem that the thermal performance of the air in the current servo motor is relatively poor, resulting in a low convective heat transfer coefficient. When the motor is running at high load, the air cooling cannot meet the heat dissipation requirements, resulting in excessively high equipment temperature, affecting performance and life; secondly, the friction during the transmission of multiple gears will increase the loss of rotor kinetic energy, thereby increasing the operating load and power consumption of the motor, which is not conducive to the kinetic energy output of the motor.

[0009] To achieve the above objectives, the present invention is implemented through the following technical solutions: a staggered-pole rotor structure of a servo motor, comprising a shell, a staggered-pole rotor assembly is arranged inside the shell, the staggered-pole rotor assembly comprises a rotating shaft that rotates and penetrates the shell, a coil winding is fixedly sleeved on the outer wall of the rotating shaft and located inside the shell, a staggered-pole rotor heat dissipation mechanism for reducing the working temperature of the staggered-pole rotor assembly is arranged at one end of the shell, and a heat transfer oil tank assembly for cooperating with the staggered-pole rotor heat dissipation mechanism is arranged on the inner wall of the shell, the heat transfer oil tank assembly comprises a heat transfer oil main pipe arranged on the upper and lower sides of the inner wall of the shell, and a plurality of arc-shaped pipes connected to the inside of the heat transfer oil main pipe are evenly arranged inside the shell and on both sides of each heat transfer oil main pipe, the ends of the two heat transfer oil main pipes away from the staggered-pole rotor heat dissipation mechanism are fixedly connected by an annular pipe 2, so as to form a heat transfer oil channel that is interconnected with the two heat transfer oil main pipes, and a drive assembly and a fan blade are respectively sleeved on the outer wall of the rotating shaft and located inside the staggered-pole rotor heat dissipation mechanism.

[0010] Furthermore, both sides of the outer wall of the rotating shaft are provided with limiting grooves for positioning when installing the staggered-pole rotor heat dissipation mechanism, and positioning blocks for facilitating the installation and positioning of the drive assembly are fixedly arranged on the outer wall of the rotating shaft and at one end of the two limiting grooves.

[0011] Furthermore, the staggered-pole rotor heat dissipation mechanism includes a mounting tube that is detachably fixed on the outer wall of the outer shell by bolts and an air inlet evenly arranged on the outer wall of the mounting tube, an avoidance through hole is arranged at one end of the mounting tube, and limit blocks that cooperate with the limit grooves are fixedly arranged on both sides of the inner wall of the avoidance through hole, and a heat transfer oil delivery component for delivering heat transfer oil to the heat transfer oil tank component is fixedly arranged inside the mounting tube.

[0012] Furthermore, the thermal oil delivery assembly includes a thermal oil cooling unit and a thermal oil supply unit and a thermal oil return unit respectively arranged above and below the thermal oil cooling unit;

[0013] The heat transfer oil cooling unit comprises an annular tube 1 and a spiral heat dissipation tube 1 and a spiral heat dissipation tube 2 which are respectively fixedly arranged on both sides of the outer wall of the annular tube 1.

[0014] Furthermore, the thermal oil supply unit includes an oil pump assembly connected to one end of a spiral heat dissipation pipe, and an oil pipe connected to one of the thermal oil main pipes is provided at the top of the oil pump assembly, and a one-way valve is fixedly provided inside the oil pipe for only allowing the thermal oil to flow out of the oil pump assembly.

[0015] Furthermore, the heat transfer oil return unit includes an oil return assembly for returning the heat transfer oil after participating in the heat exchange, one end of the oil return assembly is provided with an oil pipe 2 fixedly connected to another heat transfer oil main pipe, and the interior of the oil pipe 2 is fixedly provided with a one-way valve 2 that only allows the heat transfer oil to flow into the oil return assembly.

[0016] Furthermore, the oil pump assembly and the oil return assembly have the same structure, the oil pump assembly includes an oil cylinder fixedly arranged on the inner wall of the mounting cylinder and a branch pipe 1 fixedly arranged on the top of the oil cylinder and connected with the interior thereof, a branch pipe 2 connected with the interior thereof is fixedly arranged on the side wall of the oil cylinder and close to the branch pipe 1, a piston is sealingly and slidably arranged inside the oil cylinder, a lifting rod is fixedly arranged at the bottom of the piston, the lifting rod slides through the oil cylinder and is fixedly arranged with a hemispherical block, a spring is provided on the outer wall of the lifting rod and is slidably sleeved between the oil cylinder and the hemispherical block.

[0017] Furthermore, the driving assembly includes a bearing sleeve and installation positioning grooves opened on both sides of the inner wall of the bearing sleeve, and a protrusion is fixedly provided on the outer wall of the bearing sleeve for driving the oil pumping assembly and the oil return assembly to pump oil and suck thermal oil respectively, and a counterweight block is fixedly provided at the relative position between the outer wall of the bearing sleeve and the protrusion.

[0018] Furthermore, a plurality of heat dissipation fins are evenly and fixedly arranged on the outer wall of the shell, and a copper metal rod is fixedly arranged at one end of each heat dissipation fin close to the heat transfer oil main pipe, and the copper metal rod penetrates the shell and extends into the arc tube at the corresponding position.

[0019] The present invention also discloses a method for assembling a staggered-pole rotor structure of a servo motor, the method comprising the following steps:

[0020] Step 1: First, fix the fan blades on the outer wall of the rotating shaft close to the housing by bolts, then install the drive assembly at a preset position on the outer wall of the rotating shaft, and lock its position with bolts;

[0021] Step 2: Then, the staggered-pole rotor heat dissipation mechanism is integrally sleeved on the outside of the rotating shaft, and gradually approaches the side wall of the shell. After being tightly attached to the outer wall of the shell, the position of the staggered-pole rotor heat dissipation mechanism is locked by fastening bolts, and the staggered-pole rotor heat dissipation mechanism is connected to the two heat transfer oil main pipes;

[0022] Step 3: When the shaft is running, the driving assembly and the shaft rotate synchronously. The staggered-pole rotor heat dissipation mechanism is driven by the driving assembly, and the cooled heat transfer oil inside the staggered-pole rotor heat dissipation mechanism is pumped into the heat transfer oil main pipe. After heat exchange, the heat transfer oil with a higher temperature is re-inhaled into the staggered-pole rotor heat dissipation mechanism for cooling, and this cycle is repeated to continuously dissipate heat for the staggered-pole rotor assembly.

[0023] The present invention provides a staggered pole rotor structure and assembly method for a servo motor. Compared with the prior art, it has the following beneficial effects:

[0024] 1. A staggered-pole rotor structure and assembly method of a servo motor. By setting a staggered-pole rotor heat dissipation mechanism, the pump oil assembly can transport the cooled heat-conducting oil to the heat-conducting oil main pipe, so that the heat-conducting oil and the air inside the shell exchange heat, thereby reducing the temperature of the working environment of the coil winding; secondly, the return oil assembly can quickly draw the heat-conducting oil after the heat exchange into the inside thereof, and after heat dissipation by two sections of spiral heat dissipation pipes, form low-temperature heat-conducting oil again, so as to prepare for the next heat dissipation work, thereby achieving the effect of continuous circulation of the heat-conducting oil, so that the heat inside the shell is continuously taken away, and the purpose of efficient cooling is achieved; furthermore, compared with the traditional method of directly blowing air to the rotor, the present invention can make the environment in which the rotor is located relatively sealed, reduce the influence of external dust, moisture, etc. on the inside of the motor, thereby effectively protecting the rotor, avoiding damage to the rotor during the cooling process, and extending its service life, and using the heat-conducting oil as the heat transfer medium, the heat-conducting oil has a high thermal conductivity and specific heat capacity, can quickly and effectively extract the heat inside the motor, achieve efficient heat dissipation effect, and adapt to various harsh environments such as high temperature, high humidity, and dust.

[0025] 2. A staggered-pole rotor structure and assembly method for a servo motor. During the rotation of the shaft, only the convex block and the hemispherical block are in contact. The contact area and the interaction force in this process are small, so that the friction force on the shaft is small, achieving the purpose of having less impact on the normal operating conditions of the motor. At the same time, it can reduce the motor load, save energy loss during motor operation, and reduce the motor operating cost.

[0026] 3. A staggered-pole rotor structure and assembly method for a servo motor. By setting a drive assembly, the power of the motor shaft can be used to drive the oil pump assembly and the oil return assembly to work intermittently, thereby achieving the purpose of continuous circulation of the heat transfer oil. This process does not require a separate power device for the flow of the heat transfer oil, thereby making the structure simpler, saving manufacturing costs, and facilitating subsequent inspection and maintenance work. Secondly, the staggered-pole rotor heat dissipation mechanism, the drive assembly, and the fan blades and the shaft are split designs, which can realize the rapid installation and rapid disassembly of each part. After some parts are damaged, they can be repaired or replaced in a targeted manner, avoiding the high maintenance cost of overall replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of part A;

[0030] Figure 4 For the present invention Figure 2 A schematic diagram of the enlarged structure of part B in FIG.

[0031] Figure 5 It is a schematic diagram of the structure of the present invention in a decomposed state;

[0032] Figure 6 For the present invention Figure 5 A schematic diagram of the enlarged structure of part C in FIG.

[0033] Figure 7 It is a schematic diagram of the first cross-sectional structure of the staggered-pole rotor heat dissipation mechanism of the present invention;

[0034] Figure 8 It is a second cross-sectional structural schematic diagram of the staggered-pole rotor heat dissipation mechanism of the present invention;

[0035] Fig. 9 This is a schematic diagram of the structure of the heat transfer oil delivery assembly of the present invention;

[0036] Fig.10 It is a schematic diagram of the cross-sectional structure of the oil pump assembly of the present invention;

[0037] Fig.11 It is a schematic diagram of the structure of the driving component of the present invention.

[0038] In the figure: 1, shell; 2, coil winding; 3, shaft; 4, staggered-pole rotor heat dissipation mechanism; 41, mounting tube; 42, stopper; 43, heat transfer oil delivery assembly; 431, annular tube 1; 432, spiral heat dissipation tube 1; 433, spiral heat dissipation tube 2; 434, oil pump assembly; 4341, oil cylinder; 4342, branch pipe 1; 4343, branch pipe 2; 4344, piston; 4345, lifting rod; 4346, spring; 435, oil pipe 1; 436, one-way valve 1; 437, oil return assembly; 438, oil pipe 2; 439, one-way valve 2; 5, heat transfer oil main pipe; 6, arc tube; 7, annular tube 2; 8, drive assembly; 81, bearing sleeve; 82, installation positioning groove; 83, bump; 84, counterweight; 9, fan blade; 10, stopper groove; 11, positioning block. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figures 1 to 11 The present invention provides two technical solutions: a staggered pole rotor structure of a servo motor, specifically including the following embodiments:

[0041] Embodiment 1: A staggered-pole rotor structure of a servo motor comprises a shell 1, a staggered-pole rotor assembly is arranged inside the shell 1, the staggered-pole rotor assembly comprises a rotating shaft 3 which rotates and passes through the shell 1, a coil winding 2 is fixedly sleeved on the outer wall of the rotating shaft 3 and located inside the shell 1, a staggered-pole rotor heat dissipation mechanism 4 for reducing the working temperature of the staggered-pole rotor assembly is arranged at one end of the shell 1, and a heat transfer oil tank assembly for cooperating with the staggered-pole rotor heat dissipation mechanism 4 is arranged on the inner wall of the shell 1, the heat transfer oil tank assembly comprises a heat transfer oil main pipe 5 opened on the upper and lower sides of the inner wall of the shell 1, and a plurality of arc-shaped pipes 6 which are connected to the inside of the heat transfer oil main pipe 5 are evenly opened inside the shell 1 and on both sides of each heat transfer oil main pipe 5, the ends of the two heat transfer oil main pipes 5 away from the staggered-pole rotor heat dissipation mechanism 4 are fixedly connected by an annular pipe 7, which is used to form a heat transfer oil channel interconnected with the two heat transfer oil main pipes 5, and a drive assembly 8 and a fan blade 9 are respectively sleeved on the outer wall of the rotating shaft 3 and located inside the staggered-pole rotor heat dissipation mechanism 4. The driving assembly 8 is used to provide power for the operation of the staggered-pole rotor heat dissipation mechanism 4, and the fan blade 9 is used to accelerate the heat dissipation speed of the heat transfer oil. The fan blade 9 is detachably fixed on the outer wall of the rotating shaft 3 by bolts; the annular tube 2 7 is an annular structure, which is fixedly connected to the inner wall of the housing 1 by the mounting frame, and will not interfere with the coil winding 2. Both sides of the outer wall of the rotating shaft 3 are provided with limit grooves 10 for positioning the staggered-pole rotor heat dissipation mechanism 4 during installation, and positioning blocks 11 are fixedly provided on the outer wall of the rotating shaft 3 and at one end of the two limit grooves 10 for facilitating the installation and positioning of the driving assembly 8. A plurality of heat dissipation fins are evenly fixed on the outer wall of the housing 1, and a copper metal rod is fixedly provided at one end of each heat dissipation fin close to the heat transfer oil main pipe 5, and the copper metal rod passes through the housing 1 and extends into the arc tube 6 at the corresponding position.

[0042] Embodiment 2: The main difference between this embodiment and the first technical solution is: a staggered pole rotor structure of a servo motor, the staggered pole rotor heat dissipation mechanism 4 includes a mounting cylinder 41 detachably fixed on the outer wall of the shell 1 by bolts and an air inlet evenly opened on the outer wall of the mounting cylinder 41, an avoidance through hole is opened at one end of the mounting cylinder 41, and both sides of the inner wall of the avoidance through hole are fixedly provided with limit blocks 42 used in conjunction with the limit groove 10, and a heat transfer oil delivery component 43 for delivering heat transfer oil to the heat transfer oil tank component is fixedly provided inside the mounting cylinder 41; a plurality of heat dissipation fins are evenly fixed on the outer wall of the mounting cylinder 41, and a plurality of ventilation holes are evenly opened on the outer wall of the mounting cylinder 41 near the limit block 42; the aperture of the avoidance through hole is adapted to the outer diameter of the rotating shaft 3. The heat transfer oil delivery assembly 43 includes a heat transfer oil cooling unit and a heat transfer oil supply unit and a heat transfer oil return unit respectively arranged above and below the heat transfer oil cooling unit; the heat transfer oil cooling unit includes an annular tube 1 431 and spiral heat transfer pipe 1 432 and spiral heat transfer pipe 2 433 respectively fixedly arranged on both sides of the outer wall of the annular tube 1 431. The heat transfer oil supply unit includes an oil pump assembly 434 connected to one end of the spiral heat transfer pipe 1 432, and an oil pipe 1 435 connected to one of the heat transfer oil main pipes 5 is arranged at the top of the oil pump assembly 434, and a one-way valve 1 436 for only allowing the heat transfer oil to flow out of the oil pump assembly 434 is fixedly arranged inside the oil pipe 1 435. The heat transfer oil return unit includes an oil return assembly 437 for returning the heat transfer oil after heat exchange. One end of the oil return assembly 437 is provided with an oil pipe 438 fixedly connected to another heat transfer oil main pipe 5. A one-way valve 439 is fixedly provided inside the oil pipe 438 for only allowing the heat transfer oil to flow into the oil return assembly 437. The interiors of the oil pump assembly 434, the oil return assembly 437, the annular tube 1 431, the oil pipe 1 435, and the oil pipe 2 438 are all filled with heat transfer oil; the inner diameter of the annular tube 1 431 is larger than the rotating shaft 3, the annular tube 1 431 is sleeved on the outside of the rotating shaft 3, and the annular tube 1 431, the spiral heat dissipation tube 1 432 and the spiral heat dissipation tube 2 433 are fixed on the inner wall of the mounting tube 41 through a bracket; the oil pipe 1 435 and the oil pipe 2 438 both penetrate the mounting tube 41 and extend to the outside, the ends of the oil pipe 1 435 and the oil pipe 2 438 are both sealed and rotatably provided with internal threaded joints, and the inlet positions of the two heat transfer oil main pipes 5 are both fixedly provided with external threaded joints, after the sealing tape is wrapped around the outer wall of the external threaded joint, the internal threaded joint is connected to the external threaded joint through a thread, and the sealing tape is used to prevent leakage of the heat transfer oil.The oil pump assembly 434 and the oil return assembly 437 have the same structure. The oil pump assembly 434 includes an oil cylinder 4341 fixedly arranged on the inner wall of the mounting cylinder 41 and a branch pipe 1 4342 fixedly arranged at the top of the oil cylinder 4341 and connected with the interior thereof. A branch pipe 2 4343 connected with the interior thereof is fixedly arranged on the side wall of the oil cylinder 4341 and close to the branch pipe 1 4342. A piston 4344 is sealingly and slidably arranged inside the oil cylinder 4341. A lifting rod 4345 is fixedly arranged at the bottom of the piston 4344. The lifting rod 4345 slides through the oil cylinder 4341 and is fixedly provided with a hemispherical block. A spring 4346 is provided on the outer wall of the lifting rod 4345 and is located between the oil cylinder 4341 and the hemispherical block as a sliding sleeve. The branch pipe 1 4342 is fixedly connected to the oil pipe 1 435, and the branch pipe 1 4342 in the oil return assembly 437 is fixedly connected to the oil pipe 2 438; the branch pipe 2 4343 in the oil return assembly 437 and the oil pump assembly 434 are respectively fixedly connected to the spiral heat dissipation pipe 1 432 and the spiral heat dissipation pipe 2 433 at the corresponding positions; the movable upper limit of the piston 434 is located below the branch pipe 2 4343. The driving assembly 8 includes a bearing sleeve 81 and mounting positioning grooves 82 provided on both sides of the inner wall of the bearing sleeve 81. The outer wall of the bearing sleeve 81 is fixedly provided with a protrusion 83 for driving the oil pump assembly 434 and the oil return assembly 437 to perform oil pumping and heat transfer oil suction respectively. A counterweight 84 is fixedly provided at a position relative to the outer wall of the bearing sleeve 81 and the protrusion 83. The weight of the counterweight block 84 is equal to that of the protrusion 83, and the protrusion 83 and the center position of the counterweight block 84-bearing sleeve 81 are symmetrically installed to balance the influence of the centrifugal force generated when the protrusion 83 rotates on the rotating shaft 3. Two installation positioning grooves 82 are respectively corresponding to the sliding sleeves on the two positioning blocks 11, and the bearing sleeve 81 is detachably fixedly connected to the rotating shaft 3 by bolts; when the protrusion 83 rotates in a circle, it will meet the hemispherical block in the oil return assembly 437 and the oil pump assembly 434, and can push the hemispherical block to move a preset distance.

[0043] The present invention also provides a method for assembling a staggered-pole rotor structure of a servo motor, the method comprising the following steps:

[0044] Step 1: First, the fan blade 9 is fixedly installed on the outer wall of the rotating shaft 3 close to the housing 1 by bolts, and then the driving assembly 8 is installed at a preset position on the outer wall of the rotating shaft 3, and its position is locked by bolts; the specific process is: since the central position of the fan blade 9 is provided with a mounting through hole that matches the outer diameter of the rotating shaft 3, the fan blade 9 is sleeved on the outer wall of the rotating shaft 3 by using the mounting through hole, and the fan blade 9 is pushed to the position between the positioning block 11 and the housing 1, and then the position of the fan blade 9 is locked by bolts;

[0045] Next, the bearing sleeve 81 is sleeved on the outer wall of the rotating shaft 3, and the installation positioning grooves 82 on both sides of the inner wall of the bearing sleeve 81 are respectively aligned with the positioning blocks 11 at two corresponding positions, and then the bearing sleeve 81 is pushed so that the two installation positioning grooves 82 are respectively slidably sleeved on the outer walls of the positioning blocks 11 at the corresponding positions, until the installation positioning grooves 82 completely cover the positioning blocks 11 at the corresponding positions, at this time, the position of the bearing sleeve 81 is locked by means of fastening bolts;

[0046] Step 2, then, the staggered-pole rotor heat dissipation mechanism 4 is integrally sleeved on the outside of the rotating shaft 3, and gradually approaches the side wall of the shell 1, and after being tightly attached to the outer wall of the shell 1, the position of the staggered-pole rotor heat dissipation mechanism 4 is locked by fastening bolts, and the staggered-pole rotor heat dissipation mechanism 4 and the two heat transfer oil main pipes 5 are connected; the specific process is: since the heat transfer oil delivery component 43 and the installation cylinder 41 are fixedly connected as a whole, and the centers of the annular pipe 1 431 and the avoidance through hole are on the same straight line, one end of the installation cylinder 41 is sleeved on the outer wall of the rotating shaft 3 at the same time to avoid the through hole and the annular pipe 1 431, and The limit blocks 42 on both sides of the inner wall of the avoidance through hole are slid along the limit grooves 10 at the corresponding positions until the limit blocks 42 slide to the end of the limit grooves 10, that is, they are against one end of the positioning block 11. At this time, the mounting tube 41 and the outer shell 1 are locked by bolts; at the same time, the internal threaded joints at one end of the oil pipe 1 435 and the oil pipe 2 438 are respectively opposite to the external threaded joints at one end of the two heat transfer oil main pipes 5. At this time, sealing tape is wrapped around the outside of the external threaded joints, and the internal threaded joints are put on the external threaded joints, and the internal threaded joints are rotated so that the internal threaded joints are firmly locked on the internal threaded joints.

[0047] Step 3, when the shaft 3 is running, the driving assembly 8 and the shaft 3 rotate synchronously, and the staggered rotor heat dissipation mechanism 4 is driven by the driving assembly 8, and the heat transfer oil that has been cooled inside the staggered rotor heat dissipation mechanism 4 is pumped into the heat transfer oil main pipe 5, and the heat transfer oil with a higher temperature after heat exchange is sucked into the staggered rotor heat dissipation mechanism 4 for cooling, and this reciprocating process continues to dissipate heat for the staggered rotor assembly; the specific process is: when the shaft 3 rotates, the bearing sleeve 81 rotates synchronously with the shaft 3, and when the protrusion 83 rotates to a position close to the oil pump assembly 434 and meets it, the protrusion 83 pushes the hemispherical block to move upward, and due to the provision of the one-way valve 1 436 and the one-way valve 2 439, the piston 4 344 squeezes the heat transfer oil in the oil cylinder 4341 into one of the heat transfer oil main pipes 5 through the branch pipe 1 4342 and the oil pipe 1 435, and the heat transfer oil is evenly distributed in a plurality of arc-shaped pipes 6 connected thereto along the heat transfer oil main pipe 5, and the heat transfer oil with a lower temperature exchanges heat through the metal inner wall of the shell 1, and the heat inside the shell 1 is absorbed by the heat transfer oil, and is preliminarily dissipated through the heat dissipation fins arranged on the surface of the shell 1 and connected to the arc-shaped pipe 6. After the heat transfer oil is continuously pumped into one of the heat transfer oil main pipes 5, the heat transfer oil that has completed the heat exchange flows through the annular pipe 2 7 and the other heat transfer oil main pipe 5 and then enters the oil return assembly 437;

[0048] When the protrusion 83 rotates to meet the hemispherical block in the oil return assembly 437, the piston 4344 in the oil return assembly 437 moves upward to squeeze the heat transfer oil into the spiral heat dissipation tube 433. When the heat transfer oil passes through the spiral heat dissipation tube 433, the annular tube 431 and the spiral heat dissipation tube 432, the fan blades 9 blow external air on the surfaces of the spiral heat dissipation tube 433, the annular tube 431 and the spiral heat dissipation tube 432. The heat of the heat transfer oil is quickly taken away through the outer walls of the spiral heat dissipation tube 433, the annular tube 431 and the spiral heat dissipation tube 432, so that the temperature of the heat transfer oil is reduced. The cooled heat transfer oil is pumped into the outer casing 1 by the oil pump assembly 434 again for heat exchange.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] 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 staggered-pole rotor structure of a servo motor, comprising a housing (1), characterized in that: A staggered-pole rotor assembly is arranged inside the shell (1), the staggered-pole rotor assembly comprises a rotating shaft (3) which rotates and penetrates the shell (1), a coil winding (2) is arranged on the outer wall of the rotating shaft (3) and is located inside the shell (1) and fixedly sleeved, one end of the shell (1) is provided with a staggered-pole rotor heat dissipation mechanism (4) for reducing the working temperature of the staggered-pole rotor assembly, and a heat-conducting oil tank assembly for cooperating with the staggered-pole rotor heat dissipation mechanism (4) is arranged on the inner wall of the shell (1), the heat-conducting oil tank assembly comprises a heat-conducting oil tank assembly which is arranged on the upper and lower sides of the inner wall of the shell (1) The invention relates to a heat transfer oil pipe (5) having a plurality of arc-shaped pipes (6) connected to the inside of the heat transfer oil pipe (5) and arranged evenly on both sides of each heat transfer oil pipe (5) inside the housing (1); the ends of the two heat transfer oil pipes (5) away from the staggered-pole rotor heat dissipation mechanism (4) are fixedly connected by an annular pipe (7) to form a heat transfer oil channel that is interconnected with the two heat transfer oil pipes (5); and a drive assembly (8) and a fan blade (9) are respectively sleeved on the outer wall of the rotating shaft (3) and located inside the staggered-pole rotor heat dissipation mechanism (4).

2. The staggered pole rotor structure of a servo motor according to claim 1, characterized in that: Both sides of the outer wall of the rotating shaft (3) are provided with limiting grooves (10) for positioning the staggered-pole rotor heat dissipation mechanism (4) when installing, and positioning blocks (11) are fixedly provided on the outer wall of the rotating shaft (3) and at one end of each of the two limiting grooves (10) for facilitating the installation and positioning of the drive assembly (8).

3. The staggered pole rotor structure of a servo motor according to claim 2, characterized in that: The staggered-pole rotor heat dissipation mechanism (4) comprises a mounting tube (41) detachably fixedly mounted on the outer wall of the housing (1) by means of bolts and air inlets uniformly arranged on the outer wall of the mounting tube (41); an avoidance through hole is arranged at one end of the mounting tube (41); both sides of the inner wall of the avoidance through hole are fixedly provided with limit blocks (42) used in conjunction with the limit groove (10); and a heat transfer oil delivery component (43) for delivering heat transfer oil to the heat transfer oil tank component is fixedly arranged inside the mounting tube (41).

4. The staggered pole rotor structure of a servo motor according to claim 3, characterized in that: The heat transfer oil delivery assembly (43) comprises a heat transfer oil cooling unit and a heat transfer oil supply unit and a heat transfer oil return unit respectively arranged above and below the heat transfer oil cooling unit; The heat transfer oil cooling unit comprises an annular tube 1 (431) and a spiral heat dissipation tube 1 (432) and a spiral heat dissipation tube 2 (433) respectively fixedly arranged on both sides of the outer wall of the annular tube 1 (431).

5. The staggered pole rotor structure of a servo motor according to claim 4, characterized in that: The heat transfer oil supply unit comprises an oil pump assembly (434) connected to one end of a spiral heat dissipation pipe (432); an oil pipe (435) connected to one of the heat transfer oil main pipes (5) is arranged at the top end of the oil pump assembly (434); a one-way valve (436) for allowing only the heat transfer oil to flow out of the oil pump assembly (434) is fixedly arranged inside the oil pipe (435).

6. The staggered pole rotor structure of a servo motor according to claim 5, characterized in that: The heat transfer oil return unit comprises an oil return assembly (437) for returning the heat transfer oil after participating in the heat exchange, one end of the oil return assembly (437) is provided with a second oil pipe (438) fixedly connected to another heat transfer oil main pipe (5), and a second one-way valve (439) is fixedly provided inside the second oil pipe (438) for only allowing the heat transfer oil to flow into the oil return assembly (437).

7. The staggered pole rotor structure of a servo motor according to claim 5, characterized in that: The oil pump assembly (434) and the oil return assembly (437) have the same structure. The oil pump assembly (434) includes an oil cylinder (4341) fixedly arranged on the inner wall of the mounting cylinder (41) and a branch pipe 1 (4342) fixedly arranged at the top of the oil cylinder (4341) and connected to the inside thereof. A branch pipe 2 (4343) connected to the inside thereof is fixedly arranged on the side wall of the oil cylinder (4341) and close to the branch pipe 1 (4342). A piston (4344) is sealingly and slidably arranged inside the oil cylinder (4341). A lifting rod (4345) is fixedly arranged at the bottom of the piston (4344). The lifting rod (4345) slides through the oil cylinder (4341) and is fixedly provided with a hemispherical block. A spring (4346) is slidingly sleeved on the outer wall of the lifting rod (4345) and located between the oil cylinder (4341) and the hemispherical block.

8. The staggered pole rotor structure of a servo motor according to claim 6, characterized in that: The driving assembly (8) comprises a bearing sleeve (81) and mounting positioning grooves (82) provided on both sides of the inner wall of the bearing sleeve (81); a protrusion (83) for driving the oil pumping assembly (434) and the oil return assembly (437) to respectively perform oil pumping and heat transfer oil suction operations; and a counterweight (84) is fixedly provided at a position relative to the outer wall of the bearing sleeve (81) and the protrusion (83).

9. The staggered pole rotor structure of a servo motor according to claim 1, characterized in that: A plurality of heat dissipation fins are evenly and fixedly arranged on the outer wall of the shell (1), and a copper metal rod is fixedly arranged at one end of each heat dissipation fin close to the heat transfer oil main pipe (5). The copper metal rod penetrates the shell (1) and extends into the arc tube (6) at a corresponding position.

10. An assembly method for a staggered-pole rotor structure of a servo motor according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Step 1: First, the fan blade (9) is fixedly mounted on the outer wall of the rotating shaft (3) close to the housing (1) by means of bolts, and then the driving assembly (8) is mounted at a preset position on the outer wall of the rotating shaft (3), and its position is locked by means of bolts; Step 2: Next, the staggered-pole rotor heat dissipation mechanism (4) is integrally sleeved on the outside of the rotating shaft (3), and gradually approaches the side wall of the housing (1). After being tightly attached to the outer wall of the housing (1), the position of the staggered-pole rotor heat dissipation mechanism (4) is locked using fastening bolts, and the staggered-pole rotor heat dissipation mechanism (4) is connected to the two heat transfer oil main pipes (5); Step 3: When the rotating shaft (3) is running, the driving assembly (8) and the rotating shaft (3) rotate synchronously. The staggered-pole rotor heat dissipation mechanism (4) is driven by the driving assembly (8), and the heat transfer oil that has been cooled inside the staggered-pole rotor heat dissipation mechanism (4) is pumped into the heat transfer oil main pipe (5). After heat exchange, the heat transfer oil with a higher temperature is sucked back into the staggered-pole rotor heat dissipation mechanism (4) for cooling. This cycle is repeated to continuously dissipate heat from the staggered-pole rotor assembly.

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