Calibration motor and vehicle

Abstract

The invention provides a calibration motor and a vehicle, and relates to the technical field of vehicle parts, and the calibration motor comprises a motor body which comprises a motor housing, a motor shaft and a rotor iron core embedded with rotor magnetic steel; the switching mechanism comprises a switching seat and a switching shaft, the switching seat sleeves the switching shaft and is rotatably connected with the switching shaft, the switching shaft is coaxially connected to one end of the motor shaft, and the switching seat is connected with the motor shell; the temperature measuring mechanism comprises a wireless remote sensing temperature sensor and a temperature measuring element, the temperature measuring element is used for being arranged on rotor magnetic steel, and the wireless remote sensing temperature sensor is arranged at the end, away from the motor shaft, of the adapter shaft and connected with the temperature measuring element through a wire; and the wireless remote sensing temperature sensor is used for sending a temperature signal acquired by the temperature measuring element to the upper computer for decoding so as to measure the temperature of the motor rotor. In this way, the accuracy of temperature measurement can be improved, and the calibration motor can test the real operation temperature of the motor rotor under all working conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle parts, and in particular to a calibration motor and a vehicle. Background Art

[0002] With the rapid development of the new energy industry, the performance requirements for motors are becoming higher and higher, especially the monitoring of motor rotor temperature is required to be more and more accurate.

[0003] At present, the following two methods are usually used to monitor the motor rotor temperature. The first is the back-EMF reverse calculation method, that is, after the motor runs to a certain working condition, its back-EMF is tested, and the rotor temperature is reversed based on the back-EMF. However, this method needs to rely on analog calculations, which not only has temperature errors, but also cannot determine the temperature of specific points. The second is to use a conductive ring, that is, to arrange a thermocouple at the rotor magnetic steel position, lead the thermocouple to the dynamic ring of the conductive ring, and lead the lead wire on the static ring of the conductive ring out of the motor housing, and use the conductive ring to transmit the temperature signal collected by the thermocouple to detect the temperature of the rotor magnetic steel. However, the conductive ring is usually fixed on the rotating shaft and is generally a carbon brush structure with a relatively complex structure, which makes it easy for the rotating shaft to fail to achieve high-speed operation due to heavy load. Moreover, the setting position of the conductive ring on the rotating shaft may occupy the part of the rotating shaft where the oil channel needs to be designed, resulting in the oil channel inside the rotating shaft being unable to communicate with the oil channel inside the rotor. When the conductive ring and the rotating shaft operate synchronously, it is easy to generate additional mechanical losses due to friction, resulting in the motor being unable to complete the high-speed temperature rise condition, and thus unable to simulate the temperature rise test of the actual operating condition of the rotor. Summary of the invention

[0004] The problem solved by the present invention is: how to enable a calibrated motor to test the actual operating temperature of a rotor under all working conditions while ensuring the accuracy of temperature measurement.

[0005] In order to solve the above problems, the present invention provides a calibration motor and a vehicle.

[0006] In a first aspect, the present invention provides a calibration motor, comprising:

[0007] The motor body comprises a motor housing, a motor shaft and a rotor core embedded with rotor magnetic steel, wherein the rotor core is sleeved on the motor shaft and located in the motor housing;

[0008] The adapter mechanism comprises an adapter seat and an adapter shaft, wherein the adapter seat is sleeved on the adapter shaft and is rotatably connected to the adapter shaft, and the adapter shaft is coaxially connected to one end of the motor shaft, and the adapter seat is connected to the motor housing;

[0009] And a temperature measuring mechanism, including a wireless remote sensing temperature sensor and a temperature measuring element, wherein the temperature measuring element is used to be arranged on the rotor magnetic steel, the wireless remote sensing temperature sensor is arranged at one end of the adapter shaft away from the motor shaft, and is connected to the temperature measuring element through a wire, and the wireless remote sensing temperature sensor is used to send the temperature signal collected by the temperature measuring element to the host computer for decoding to measure the temperature of the motor rotor.

[0010] Optionally, the motor shaft is provided with a first cavity along its axial direction, a first threading hole connected to the first cavity is provided on the outer peripheral wall of the motor shaft, the adapter shaft is provided with a second cavity along its axial direction, the second cavity is connected to the first cavity, and the wire is connected to the wireless remote sensing temperature sensor through the first threading hole, the first cavity and the second cavity in sequence.

[0011] Optionally, the motor body also includes end plates arranged at both axial ends of the rotor core, the end plates are provided with a first guide groove, a second wire threading hole and a second guide groove, the first guide groove is arranged on the end surface of the end plate facing the rotor core, the second guide groove is arranged on the end surface of the end plate away from the rotor core, the first guide groove and the second guide groove are connected through the second wire threading hole, the second guide groove is connected with the first wire threading hole, and the wire is connected to the wireless remote sensing temperature sensor via the first guide groove, the second wire threading hole, the second guide groove, the first wire threading hole, the first cavity and the second cavity in sequence.

[0012] Optionally, the motor body further comprises an end cover, and the motor housing is detachably connected to one of the end cover and the adapter in an alternative manner;

[0013] When the motor housing is connected to the end cover, the switching mechanism and the temperature measuring element are separated from the motor body.

[0014] Optionally, an oil inlet is provided on the outer wall of the motor housing, a first oil passage connected to the oil inlet is provided inside the housing wall of the motor housing, a second oil passage connected to the first oil passage is provided on the adapter seat, a first oil hole connected to the first cavity is provided on the motor shaft, the first oil hole is provided at a position corresponding to a support bearing of the motor shaft, a second oil hole is provided on the adapter shaft, a liquid inlet end and a liquid outlet end of the second oil hole are respectively connected to the second oil passage and the second cavity, and the cooling oil flowing in from the oil inlet flows to the support bearing via the first oil passage, the second oil passage, the second oil hole, the second cavity, the first cavity and the first oil hole in sequence.

[0015] Optionally, one end of the motor shaft for connecting to the adapter shaft is inserted into the second cavity, and the motor shaft is provided with a third oil hole coaxially arranged with the second oil hole, and the liquid inlet end and the liquid outlet end of the third oil hole are respectively connected with the liquid outlet end of the second oil hole and the first cavity, and the cooling oil flowing in from the oil inlet enters the first cavity through the first oil channel, the second oil channel, the second oil hole and the third oil hole in sequence, and flows from the first oil hole to the support bearing.

[0016] Optionally, the adapter mechanism also includes two first seals, which are respectively sleeved on the adapter shaft and located between the adapter shaft and the adapter seat. The adapter seat and the adapter shaft form a dynamic seal through the two first seals, and the liquid outlet end of the second oil channel and the second oil hole are both located between the two first seals.

[0017] Optionally, the adapter mechanism further includes a second seal, which is used to be arranged between the adapter seat and the motor housing and is located at the connection between the first oil passage and the second oil passage, and the adapter seat and the motor housing are used to be sealed and connected at the second seal.

[0018] Optionally, the switching mechanism further includes a transmission key, and the motor shaft and the switching shaft are used to be connected in transmission via the transmission key;

[0019] And / or, the adapter mechanism further includes a bearing, and the adapter shaft is rotatably connected to the adapter seat via the bearing.

[0020] In a second aspect, the present invention provides a vehicle comprising the calibration motor as described above.

[0021] The beneficial effects of the calibration motor and vehicle of the present invention are as follows: by setting an adapter mechanism including an adapter seat and an adapter shaft, and drivingly connecting the adapter shaft with the motor shaft of the motor body, the motor shaft can drive the adapter shaft to rotate together, and at the same time, the adapter seat is connected to the motor shell of the motor body, so that the adapter seat is used to support the adapter shaft to prevent the adapter shaft from shaking when rotating with the motor shaft, thereby ensuring the dynamic balance of the adapter shaft and the motor shaft when rotating, and further ensuring the normal operation of the calibration motor. By setting a temperature measuring element and fixing the temperature measuring element on the rotor magnetic steel embedded in the rotor core, the temperature measuring element can directly contact the heat source of the motor rotor, so that the internal temperature of the motor rotor can be truly reflected, and the accuracy of temperature measurement can be improved; and by setting a wireless remote sensing temperature sensor and fixing the wireless remote sensing temperature sensor on one end of the adapter shaft away from the motor shaft, the temperature measuring element and the wireless remote sensing temperature sensor can rotate synchronously with the motor shaft, and at the same time, the wire of the temperature measuring element is connected to the wireless remote sensing temperature sensor to lead the temperature signal collected by the temperature measuring element from the inside of the motor body. In this way, when the calibration motor is rotating, the temperature signal of the rotor magnetic steel can be collected by the temperature measuring element. Since the temperature of the rotor magnetic steel represents the temperature of the motor rotor, the temperature measuring element is equivalent to collecting the temperature signal of the motor rotor. Then, the temperature signal collected by the temperature measuring element is sent to the host computer through wireless transmission technology for decoding by the wireless remote sensing temperature sensor to measure the real temperature of the motor rotor, so that the temperature measuring mechanism can monitor the real temperature of the motor rotor in real time when the calibration motor is operating normally. In addition, since the wireless remote sensing temperature sensor is connected to the motor shaft through the adapter shaft, and the temperature signal collected by the temperature measuring element is sent by wireless transmission technology, the entire temperature measurement process generates almost no or less mechanical loss, so that the calibration motor can achieve high-speed operation, and then the calibration motor can test the real operating temperature of the motor rotor under all working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a cross-sectional schematic diagram of a calibration motor in an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the assembly structure of the end plate and the motor shaft in an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the threading path of the wires connecting the temperature measuring element and the wireless remote sensing temperature sensor in an embodiment of the present invention;

[0025] Figure 4 is a schematic cross-sectional view of a motor body according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a cooling oil circuit for calibrating a motor in an embodiment of the present invention;

[0027] Figure 6 for Figure 5 A partial enlarged view of point A in the middle.

[0028] Description of reference numerals:

[0029] 1. Motor body; 11. Motor housing; 111. First housing; 112. Second housing; 113. Oil inlet nozzle; 114. Oil inlet; 115. First oil passage; 12. Motor shaft; 121. First cavity; 122. First threading hole; 123. First oil hole; 124. Third oil hole; 125. First keyway; 13. Rotor core; 131. Magnetic steel slot; 14. End plate; 141. First guide slot; 1 42. Second threading hole; 143. Second guide groove; 15. Support bearing; 16. End cover; 2. Adapter mechanism; 21. Adapter seat; 211. Second oil channel; 22. Adapter shaft; 221. Second cavity; 222. Second oil hole; 23. Transmission key; 24. Adapter shell; 25. First sealing member; 26. Second sealing member; 27. Bearing; 31. Wireless remote temperature sensor; 4. Accommodating cavity; 5. Wire. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. Although certain embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be interpreted as being limited to the embodiments described herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present invention. It should be understood that the drawings and embodiments of the present invention are only for exemplary purposes and are not intended to limit the scope of protection of the present invention.

[0031] The term "including" and its variations used in this document are open inclusions, that is, "including but not limited to"; the term "based on" means "based at least in part on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one other embodiment"; the term "some embodiments" means "at least some embodiments"; the term "optionally" means "optional embodiments". The relevant definitions of other terms will be given in the following description. It should be noted that the concepts of "first", "second", etc. mentioned in the present invention are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0032] It should be noted that the modifications of "one" and "plurality" mentioned in the present invention are illustrative rather than restrictive, and those skilled in the art should understand that, unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0033] In the related art, the following two methods are usually used to monitor the motor rotor temperature. The first is the back-EMF reverse calculation method, that is, after the motor runs to a certain working condition, its back-EMF is tested, and the rotor temperature is reversed based on the back-EMF. However, this method needs to rely on analog calculations, which not only has temperature errors, but also cannot determine the temperature of specific points. The second is to use a conductive ring, that is, to arrange a thermocouple at the rotor magnetic steel position, lead the thermocouple to the dynamic ring of the conductive ring, and lead the lead wire on the static ring of the conductive ring out of the motor housing, and use the conductive ring to transmit the temperature signal collected by the thermocouple to detect the temperature of the rotor magnetic steel. However, the conductive ring is usually fixed on the rotating shaft and is generally a carbon brush structure with a relatively complex structure, which makes it easy for the rotating shaft to fail to achieve high-speed operation due to heavy load. Moreover, the setting position of the conductive ring on the rotating shaft may occupy the part of the rotating shaft where the oil channel needs to be designed, resulting in the oil channel inside the rotating shaft being unable to communicate with the oil channel inside the rotor. When the conductive ring and the rotating shaft operate synchronously, it is easy to generate additional mechanical losses due to friction, resulting in the motor being unable to complete the high-speed temperature rise condition, and thus unable to simulate the temperature rise test of the actual operating condition of the rotor.

[0034] In view of the problems existing in the above-mentioned related technologies, the present invention provides a calibration motor and a vehicle.

[0035] Combination Figure 1 As shown, an embodiment of the present invention provides a calibration motor, comprising:

[0036] The motor body 1 includes a motor housing 11, a motor shaft 12 and a rotor core 13 embedded with rotor magnets. The rotor core 13 is sleeved on the motor shaft 12 and located in the motor housing 11.

[0037] The adapter mechanism 2 includes an adapter seat 21 and an adapter shaft 22. The adapter seat 21 is sleeved on the adapter shaft 22 and is rotatably connected to the adapter shaft 22. The adapter shaft 22 is coaxially connected to one end of the motor shaft 12. The adapter seat 21 is connected to the motor housing 11.

[0038] And a temperature measuring mechanism, including a wireless remote sensing temperature sensor 31 and a temperature measuring element. The temperature measuring element is used to be set on the rotor magnetic steel. The wireless remote sensing temperature sensor 31 is set at one end of the adapter shaft 22 away from the motor shaft 12, and is connected to the temperature measuring element through a wire 5. The wireless remote sensing temperature sensor 31 is used to send the temperature signal collected by the temperature measuring element to the host computer for decoding to measure the temperature of the motor rotor.

[0039] Specifically, the calibration motor mainly includes a motor body 1, a switching mechanism 2 and a temperature measuring mechanism. The switching mechanism 2 can be located outside the motor body 1. The temperature measuring element of the temperature measuring mechanism is arranged on the motor rotor of the motor body 1. The wireless remote sensing temperature sensor 31 of the temperature measuring mechanism is arranged on the switching mechanism 2, and the wire of the temperature measuring element passes through the motor body 1 and is connected to the wireless remote sensing temperature sensor 31.

[0040] More specifically, the motor body 1 is mainly composed of a motor housing 11, a motor shaft 12, a motor rotor and a motor stator, wherein the motor rotor includes a rotor core 13, a rotor winding and a rotor magnet, the rotor magnet is usually embedded in a magnet groove 131 of the rotor core 13, and the measuring end of the temperature measuring element is usually bonded to the surface of the rotor magnet by an adhesive to collect the temperature signal of the rotor magnet, and the temperature of the rotor magnet represents the temperature of the motor rotor, so the temperature signal collected by the temperature measuring element is also equivalent to the temperature signal of the motor rotor. The adapter mechanism 2 mainly includes an adapter seat 21 and an adapter shaft 22, wherein the adapter seat 21 and the motor housing 11 are detachably connected by means such as bolt connection, and the adapter shaft 22 and the motor shaft 12 are transmission-connected by means such as a keyway structure or a spline structure, so that the motor shaft 12 can drive the adapter shaft 22 to rotate together, and the wireless remote sensing temperature sensor 31 is usually detachably connected to the end of the adapter shaft 22 away from the motor shaft 12 by means such as bolts. The temperature measuring element can be a thermocouple, a thermal resistor or a thermistor, etc., and can be selected according to specific needs in practical applications. When the motor is calibrated for temperature measurement, the temperature measuring element collects the temperature signal of the rotor magnetic steel, and the wireless remote sensing temperature sensor 31 sends the temperature signal collected by the temperature measuring element to the host computer for decoding through wireless transmission technology to measure the real-time temperature of the motor rotor, thereby monitoring the temperature of the motor rotor in real time.

[0041] The calibration motor in this embodiment can be achieved by setting up an adapter mechanism 2 including an adapter seat 21 and an adapter shaft 22, and drivingly connecting the adapter shaft 22 to the motor shaft 12 of the motor body 1, so that the motor shaft 12 can drive the adapter shaft 22 to rotate together. At the same time, the adapter seat 21 is connected to the motor housing 11 of the motor body 1, so that the adapter seat 21 can be used to support the adapter shaft 22 to prevent the adapter shaft 22 from shaking when rotating with the motor shaft 12, thereby ensuring the dynamic balance of the adapter shaft 22 and the motor shaft 12 during rotation, and further ensuring the normal operation of the calibration motor. By setting a temperature measuring element and fixing the temperature measuring element on the rotor magnetic steel embedded in the rotor core 13, the temperature measuring element can directly contact the heat source of the motor rotor, so that the internal temperature of the motor rotor can be truly reflected, and the accuracy of temperature measurement can be improved; and by setting a wireless remote sensing temperature sensor 31 and fixing the wireless remote sensing temperature sensor 31 on the end of the adapter shaft 22 away from the motor shaft 12, the temperature measuring element and the wireless remote sensing temperature sensor 31 can rotate synchronously with the motor shaft 12, and at the same time, the wire 5 of the temperature measuring element is connected to the wireless remote sensing temperature sensor 31 to lead the temperature signal collected by the temperature measuring element from the inside of the motor body 1. In this way, when the motor is calibrated to rotate and run, the temperature signal of the rotor magnetic steel can be collected by the temperature measuring element. Since the temperature of the rotor magnetic steel represents the temperature of the motor rotor, the temperature measuring element is also equivalent to collecting the temperature signal of the motor rotor. Then, the temperature signal collected by the temperature measuring element is sent to the upper computer through wireless transmission technology by the wireless remote sensing temperature sensor 31 for decoding to measure the real-time temperature of the motor rotor, so that the temperature measuring mechanism can monitor the real temperature of the motor rotor in real time when the motor is calibrated to run normally. In addition, since the wireless remote sensing temperature sensor 31 is connected to the motor shaft 12 through the adapter shaft 22, and the temperature signal collected by the temperature measuring element is sent using wireless transmission technology, the entire temperature measurement process produces almost no or little mechanical loss, thereby enabling the calibration motor to run at high speed, and thus enabling the calibration motor to test the actual operating temperature of the motor rotor under all operating conditions.

[0042] Optionally, combined Figure 3 As shown, the motor shaft 12 is provided with a first cavity 121 along its axial direction, and a first threading hole 122 connected with the first cavity 121 is provided on the outer peripheral wall of the motor shaft 12. The adapter shaft 22 is provided with a second cavity 221 along its axial direction, and the second cavity 221 is connected with the first cavity 121. The wire 5 is connected to the wireless remote sensing temperature sensor 31 through the first threading hole 122, the first cavity 121 and the second cavity 221 in sequence.

[0043] It should be noted that Figure 3 The medium thick line indicates the routing path of the wire 5 of the temperature measuring element.

[0044] Specifically, the motor shaft 12 and the adapter shaft 22 are both hollow shaft structures, wherein the internal space of the motor shaft 12 constitutes a first cavity 121, and the internal space of the adapter shaft 22 constitutes a second cavity 221. At the same time, in the axial direction of the motor shaft 12, the first cavity 121 is usually closed at one end and open at the other end, while both ends of the second cavity 221 are open. When the motor shaft 12 and the adapter shaft 22 are coaxially connected, the open end of the first cavity 121 is connected to the second cavity 221. A first threading hole 122 is provided at a portion of the outer peripheral wall of the motor shaft 12 that is not blocked by the rotor core 13. The first threading hole 122 can be a radial hole perpendicular to the axis of the motor shaft 12, or can be an inclined hole structure arranged obliquely, which is not specifically limited here. For example, Figure 3 In the example in which the first threading hole 122 is a radial hole, the first cavity 121 and the second cavity 221 can not only be used to lay out the wire 5 of the temperature measuring element, but also can be used as a cooling oil channel for oil cooling.

[0045] In this optional embodiment, by respectively providing a first cavity 121 and a second cavity 221 inside the motor shaft 12 and the adapter shaft 22, a first threading hole 122 is provided at a portion of the outer peripheral wall of the motor shaft 12 that is not blocked by the rotor core 13, and the first threading hole 122 is connected to the first cavity 121, and the second cavity 221 is connected to the first cavity 121. In this way, after the wire 5 of the temperature measuring element passes through the magnetic steel slot 131, it can pass through the first cavity 121 of the motor shaft 12 through the first threading hole 122, and then pass through the first cavity 121 into the second cavity 221 of the adapter shaft 22, and finally pass through the adapter shaft 22 to reach the wireless remote sensing temperature sensor 31, so as to form a connection with the wireless remote sensing temperature sensor 31 by, for example, welding, so that the temperature signal collected by the temperature measuring element is led out to the wireless remote sensing temperature sensor 31. In addition, routing the wire 5 of the temperature measuring element from the inside of the motor shaft 12 and the adapter shaft 22 is not only convenient for routing, but also the motor shaft 12 and the adapter shaft 22 can be used to protect and isolate the wire 5, so that the temperature signal collected by the temperature measuring element can be better transmitted, and there is no need to open additional structures such as wiring grooves on the outer peripheral walls of the motor shaft 12 and the adapter shaft 22 for wiring, thereby simplifying the structure of the motor shaft 12 and the adapter shaft 22 and facilitating processing and manufacturing.

[0046] Optionally, combined Figure 2 and Figure 3As shown, the motor body 1 also includes an end plate 14 arranged at both axial ends of the rotor core 13, and the end plate 14 is provided with a first guide groove 141, a second threading hole 142 and a second guide groove 143. The first guide groove 141 is arranged on the end surface of the end plate 14 facing the rotor core 13, and the second guide groove 143 is arranged on the end surface of the end plate 14 away from the rotor core 13. The first guide groove 141 and the second guide groove 143 are connected through the second threading hole 142, and the second guide groove 143 is connected with the first threading hole 122. The wire 5 is connected to the wireless remote sensing temperature sensor 31 through the first guide groove 141, the second threading hole 142, the second guide groove 143, the first threading hole 122, the first cavity 121 and the second cavity 221 in sequence.

[0047] In this optional embodiment, the end plate 14 is sleeved on the motor shaft 12 and is located at both axial ends of the rotor core 13. The end plate 14 is mainly used to axially limit the rotor core 13 to prevent the rotor core 13 from axially moving during rotation. The end plate 14 is usually an annular structure, the first guide groove 141 is usually arranged along the radial direction of the end plate 14, the second threading hole 142 usually penetrates the end plate 14 along the axial direction, and the second guide groove 143 is usually arranged along the circumference of the end plate 14, that is, the second guide groove 143 is generally an arc-shaped groove structure as a whole, and the outlet end of the second guide groove 143 is connected to the first threading hole 122. For example, a notch is opened on the groove wall of the second guide groove 143 corresponding to the first threading hole 122 to connect the second guide groove 143 with the first threading hole 122. One end opening of the second threading hole 142 is usually arranged at the radial inner end of the first guide groove 141, that is, the end of the first guide groove 141 close to the center line of the end plate 14. Correspondingly, the end of the first guide groove 141 away from the center line of the end plate 14 is the radial outer end of the first guide groove 141, and the other end opening of the second threading hole 142 is arranged in the second guide groove 143. In this way, after the wire 5 of the first temperature measuring element passes through the rotor core 13 from the magnetic steel slot 131, it can be connected to the wireless remote sensing temperature sensor 31 through the first guide groove 141, the second threading hole 142, the second guide groove 143, the first threading hole 122, the first cavity 121 and the second cavity 221 in sequence, so as to realize the connection of the wire 5 of the temperature measuring element through the end plate 14, the motor shaft 12 and the adapter shaft 22 to the wireless remote sensing temperature sensor 31. Moreover, under the guidance of the first guide groove 141 and the second guide groove 143, not only the wiring of the wire 5 is more convenient, but also no additional space is occupied.

[0048] Optionally, combined Figure 2 and Figure 3As shown, the end plate 14 is provided with a plurality of first guide grooves 141 spaced apart along its circumference, each first guide groove 141 is provided with a corresponding second threading hole 142, the second guide groove 143 is an arc-shaped groove, and is arranged along the circumference of the end plate 14, and the plurality of second threading holes 142 are all connected to the second guide groove 143.

[0049] In this optional embodiment, in order to ensure the accuracy of temperature measurement, it is usually necessary to select multiple rotor magnets at different positions as temperature measurement points. Therefore, multiple first guide grooves 141 arranged at intervals along the circumferential direction are set on the end plate 14, and each first guide groove 141 is provided with a corresponding connected second threading hole 142 to facilitate the wires 5 of the temperature measuring elements at multiple temperature measurement points to pass through the end plate 14 through the corresponding first guide grooves 141 and second threading holes 142. Moreover, when the second guide groove 143 is an arc-shaped groove arranged along the circumference of the end plate 14, multiple second threading holes 142 can all be connected to the same second guide groove 143, so that multiple wires 5 can reach the first threading hole 122 of the motor shaft 12 along the same second guide groove 143, thereby improving the convenience of arranging multiple wires 5.

[0050] Optionally, combined Figure 1 and Figure 4 As shown, the motor body 1 also includes an end cover 16, and the motor housing 11 is detachably connected to one of the end cover 16 and the adapter 21 in an alternative manner; when the motor housing 11 is connected to the end cover 16, the adapter mechanism 2 and the temperature measuring element are separated from the motor body 1.

[0051] In this optional embodiment, the motor housing 11 and the end cover 16 together constitute the housing of the motor body 1, and the housing is a split structure, so as to facilitate segmented manufacturing. The two ends of the motor shaft 12 can extend out of the motor housing 11 respectively, wherein one end of the motor shaft 12 can be used as an output end to output power, and the other end can be used as an output end and is used to connect with the adapter shaft 22. The motor housing 11 and the end cover 16 are usually connected by bolts to form a detachable connection to facilitate disassembly and assembly. Moreover, the motor housing 11 is assembled with one of the end cover 16 and the adapter seat 21 in an alternative manner. When the motor housing 11 is connected to the adapter seat 21, that is, the motor body 1 is not equipped with the end cover 16, but is equipped with the adapter mechanism 2 and the temperature measuring mechanism, the calibration motor can be subjected to temperature testing; when the calibration motor completes the temperature test, the adapter mechanism 2 and the temperature measuring mechanism can be removed, and then the end cover 16 can be assembled to the motor housing 11. At this time, the calibration motor can be used as a conventional calibration motor for tests such as motor efficiency, torque accuracy and drag.

[0052] In this way, the connection between the motor body 1 and the adapter mechanism 2 is set as a detachable connection, so that the calibration motor has a split structure. At the same time, the motor body 1 is set to also include an end cover 16 for detachable connection to the motor housing 11, so that the end cover 16 can be removed and then the adapter mechanism 2 and the temperature measuring mechanism are assembled to perform temperature testing. After the temperature test is completed, the adapter mechanism 2 and the temperature measuring mechanism are removed and the end cover 16 is reassembled to facilitate tests such as motor efficiency, torque accuracy and drag, so that the calibration motor can be used as a multi-purpose calibration motor.

[0053] In addition, since the removal of the temperature measuring element and its wire 5 is relatively time-consuming and labor-intensive, and for the calibration of the motor, the cost of the motor rotor is much lower than the cost of the motor housing 11, in order to improve the test efficiency, when the temperature test is completed, the motor rotor is usually removed together with the adapter mechanism 2 and the temperature measuring mechanism, and then replaced with a motor rotor of the same model for subsequent testing.

[0054] Furthermore, combined with Figure 4 As shown, the motor housing 11 includes a first housing 111 and a second housing 112, which are sequentially connected along the axial direction of the motor shaft 12, the rotor core 13 is located in the first housing 111, the input end of the motor shaft 12 is used to extend out of the second housing 112, and the adapter 21 is used to be detachably connected to an end of the second housing 112 away from the first housing 111. In this way, the motor housing 11 is further designed as a split structure to facilitate segmented manufacturing and disassembly, and the structure of the production mold can be simplified to reduce production costs.

[0055] Optionally, combined Figure 1 and Figure 2 As shown, the switching mechanism 2 further includes a transmission key 23 , and the motor shaft 12 and the switching shaft 22 are used for transmission connection via the transmission key 23 .

[0056] In this optional embodiment, the motor shaft 12 and the adapter shaft 22 are respectively provided with a first keyway 125 and a second keyway, a part of the transmission key 23 is embedded in the first keyway 125, and the other part is embedded in the second keyway, so that the motor shaft 12 and the adapter shaft 22 form a transmission connection through the transmission key 23. In this way, the adapter shaft 22 can rotate synchronously with the motor shaft 12, which not only has a simple structure and a firm connection, but also the transmission key 23 can axially limit the adapter shaft 22 to prevent the motor shaft 12 and the adapter shaft 22 from sliding relative to each other in the axial direction, thereby ensuring the dynamic balance of the adapter shaft 22 and the motor shaft 12 when they rotate synchronously.

[0057] Optionally, combined Figure 1As shown, the adapter mechanism 2 further includes a bearing 27, and the adapter shaft 22 is rotatably connected to the adapter seat 21 through the bearing 27. In this way, the adapter shaft 22 can be supported by the bearing 27 while ensuring the normal rotation of the adapter shaft 22, so as to prevent the adapter shaft 22 from shaking when rotating with the motor shaft 12, thereby further ensuring the dynamic balance when the adapter shaft 22 rotates synchronously with the motor shaft 12, and further ensuring the normal operation of the calibration motor.

[0058] Optionally, combined Figure 1 As shown, the adapter mechanism 2 further includes an adapter shell 24, which is used to enclose a receiving chamber 4 with the second shell 112 of the motor shell 11, and the adapter shaft 22, the adapter seat 21 and the wireless remote temperature sensor 31 are located in the receiving chamber 4. The wireless remote temperature sensor 31 is rotatably connected to the adapter shell 24, and one end of the wireless remote temperature sensor 31 away from the adapter shaft 22 extends out of the adapter shell 24. In this way, on the one hand, the adapter shell 24 can be used to protect the adapter shaft 22, the adapter seat 21 and the wireless remote temperature sensor 31 arranged in the receiving chamber 4 to prevent external foreign matter from affecting the test operation of the calibration motor, and on the other hand, the adapter shell 24 can be used to support the wireless remote temperature sensor 31 to further ensure the dynamic balance of the wireless remote temperature sensor 31 and the adapter shaft 22 when they rotate synchronously with the motor shaft 12.

[0059] Optionally, combined Figure 5 and Figure 6 As shown, an oil inlet 114 is provided on the outer wall of the motor housing 11, a first oil passage 115 communicating with the oil inlet 114 is provided inside the housing wall of the motor housing 11, a second oil passage 211 communicating with the first oil passage 115 is provided on the adapter seat 21, a first oil hole 123 communicating with the first cavity 121 is provided on the motor shaft 12, the first oil hole 123 is provided at a position corresponding to the supporting bearing 15 of the motor shaft 12, a second oil hole 222 is provided on the adapter shaft 22, a liquid inlet end and a liquid outlet end of the second oil hole 222 are respectively communicated with the second oil passage 211 and the second cavity 221, and the cooling oil flowing in from the oil inlet 114 flows to the supporting bearing 15 via the first oil passage 115, the second oil passage 211, the second oil hole 222, the second cavity 221, the first cavity 121 and the first oil hole 123 in sequence.

[0060] In this optional embodiment, the oil inlet 114 and the first oil passage 115 are usually arranged on the second shell 112 of the motor shell 11, and the first oil passage 115 first extends along the radial direction of the motor shaft 12, and then extends along the axial direction of the motor shaft 12, that is, the first oil passage 115 is roughly an L-shaped oil passage structure. The second oil passage 211 first extends along the axial direction of the motor shaft 12, and then extends along the radial direction of the motor shaft 12 to the outer peripheral wall of the adapter shaft 22, that is, the second oil passage 211 is also roughly an L-shaped oil passage structure. The liquid outlet end of the second oil passage 211 is connected to the gap between the adapter seat 21 and the adapter shaft 22, and the liquid inlet end of the second oil hole 222 is also connected to the gap, so that the liquid outlet end of the second oil passage 211 and the liquid inlet end of the second oil hole 222 are connected through the gap. Thus, when the motor shaft 12 drives the adapter shaft 22 to rotate synchronously, the cooling oil flowing in from the oil inlet 114 can flow to the support bearing 15 through the first oil passage 115, the second oil passage 211, the second oil hole 222, the second cavity 221, the first cavity 121 and the first oil hole 123 in sequence, for example, Figure 5 The dotted line with an arrow in the figure represents the flow path of the cooling oil to cool the motor bearings; moreover, when the cooling oil flows inside the motor shaft 12, it can absorb the heat transferred to the motor shaft 12 by the motor rotor, thereby cooling the motor rotor, so that the calibrated motor can simulate the actual operating conditions of the motor with oil cooling, thereby improving the accuracy of the temperature test.

[0061] Optionally, combined Figure 6 As shown, one end of the motor shaft 12 used for connecting with the adapter shaft 22 is inserted into the second cavity 221, and the motor shaft 12 is provided with a third oil hole 124 coaxially arranged with the second oil hole 222, and the liquid inlet end and the liquid outlet end of the third oil hole 124 are respectively connected with the liquid outlet end of the second oil hole 222 and the first cavity 121, and the cooling oil flowing in from the oil inlet 114 enters the first cavity 121 through the first oil channel 115, the second oil channel 211, the second oil hole 222 and the third oil hole 124 in sequence, and flows from the first oil hole 123 to the support bearing 15.

[0062] In this way, by inserting one end of the motor shaft 12 into the second cavity 221 of the adapter shaft 22 and connecting it to the adapter shaft 22 through the transmission key 23, the axial dimension of the calibration motor can be shortened and the overall volume of the calibration motor can be reduced. At the same time, by setting a coaxially connected second oil hole 222 and a third oil hole 124 at the overlapping position of the motor shaft 12 and the adapter shaft 22, the cooling oil can be directly introduced into the interior of the motor shaft 12 without passing through the second cavity 221. The path of the cooling oil circuit can be shortened, so that the calibration motor is closer to the actual operating condition of the motor oil cooling, thereby improving the accuracy of the temperature test.

[0063] Optionally, combined Figure 5 and Figure 6As shown, the adapter mechanism 2 also includes two first seals 25, which are respectively sleeved on the adapter shaft 22 and located between the adapter shaft 22 and the adapter seat 21. The adapter seat 21 and the adapter shaft 22 form a dynamic seal through the two first seals 25, and the liquid outlet end of the second oil channel 211 and the second oil hole 222 are both located between the two first seals 25.

[0064] Since the adapter shaft 22 rotates relative to the adapter seat 21, there is usually a certain gap between the two. In order to prevent the cooling oil from entering the gap and leaking along the axial direction, the present embodiment adopts two first seals 25 set between the adapter seat 21 and the adapter shaft 22. The two first seals 25 are used to dynamically seal the connection between the second oil channel 211 and the second oil hole 222 to improve the sealing performance of the entire cooling oil circuit, reduce the loss of cooling oil, and thus reduce the consumption of cooling oil.

[0065] Optionally, combined Figure 5 and Figure 6 As shown, the adapter mechanism 2 further includes a second seal 26, which is used to be arranged between the adapter seat 21 and the motor housing 11, and is located at the connection between the first oil passage 115 and the second oil passage 211. The adapter seat 21 and the motor housing 11 are used to be sealed and connected at the second seal 26. The second seal 26 is specifically arranged between the adapter seat 21 and the second housing 112.

[0066] In this way, the second seal 26 can be used to seal the connection between the first oil passage 115 and the second oil passage 211, so as to further improve the sealing performance of the entire cooling oil circuit. In addition, a mounting groove for mounting and positioning the second seal 26 is usually provided at a position on the second housing 112 of the motor housing 11 corresponding to the oil outlet end of the first oil passage 115, or at a position on the adapter 21 corresponding to the oil inlet end of the second oil passage 211, so as to ensure that the second seal 26 can be stably installed.

[0067] Furthermore, combined with Figure 4 As shown, one end of the first cavity 121 away from the first shell 111 passes through the end surface of the motor shaft 12 , and the end cover 16 is provided with an oil inlet nozzle 113 , which is arranged along the axial direction of the motor shaft 12 and extends into the first cavity 121 of the motor shaft 12 .

[0068] In this way, when the calibration motor removes the adapter mechanism 2 and the temperature measuring mechanism and assembles the end cover 16 to perform other tests as a conventional calibration motor, cooling oil can be introduced into the motor shaft 12 through the oil inlet nozzle 113 on the end cover 16 for cooling, so that the calibration motor can simulate the actual operating conditions of the motor with oil cooling to ensure the accuracy of the test.

[0069] A vehicle provided by an embodiment of the present invention includes the calibration motor as described above.

[0070] The beneficial effects of the vehicle of this embodiment relative to the prior art are the same as those of the above-mentioned calibration motor, which will not be repeated here.

[0071] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A calibration motor, characterized in that: include: A motor body (1) comprises a motor housing (11), a motor shaft (12) and a rotor core (13) embedded with rotor magnetic steel, wherein the rotor core (13) is sleeved on the motor shaft (12) and located in the motor housing (11); The adapter mechanism (2) comprises an adapter seat (21) and an adapter shaft (22), wherein the adapter seat (21) is sleeved on the adapter shaft (22) and is rotatably connected to the adapter shaft (22), and the adapter shaft (22) is coaxially connected to one end of the motor shaft (12), and the adapter seat (21) is connected to the motor housing (11); and a temperature measuring mechanism (3), comprising a wireless remote sensing temperature sensor (31) and a temperature measuring element, wherein the temperature measuring element is arranged on the rotor magnetic steel, the wireless remote sensing temperature sensor (31) is arranged at one end of the adapter shaft (22) away from the motor shaft (12), and is connected to the temperature measuring element via a wire (5), and the wireless remote sensing temperature sensor (31) is used to send the temperature signal collected by the temperature measuring element to a host computer for decoding to measure the temperature of the motor rotor.

2. The calibration motor according to claim 1, characterized in that: The motor shaft (12) is provided with a first cavity (121) along its axial direction, and a first threading hole (122) communicating with the first cavity (121) is provided on the outer peripheral wall of the motor shaft (12). The adapter shaft (22) is provided with a second cavity (221) penetrating along its axial direction, and the second cavity (221) is communicated with the first cavity (121). The wire (5) is connected to the wireless remote temperature sensor (31) via the first threading hole (122), the first cavity (121) and the second cavity (221) in sequence.

3. The calibration motor according to claim 2, characterized in that: The motor body (1) further comprises an end plate (14) arranged at both axial ends of the rotor core (13), the end plate (14) being provided with a first guide groove (141), a second threading hole (142) and a second guide groove (143), the first guide groove (141) being arranged on an end surface of the end plate (14) facing the rotor core (13), the second guide groove (143) being arranged on an end surface of the end plate (14) facing away from the rotor core (13), the first guide groove (141) and the second guide groove (143) being connected via the second threading hole (142), the second guide groove (143) being connected with the first threading hole (122), the wire (5) being connected to the wireless remote temperature sensor (31) via the first guide groove (141), the second threading hole (142), the second guide groove (143), the first threading hole (122), the first cavity (121) and the second cavity (221) in sequence.

4. The calibration motor according to claim 2, characterized in that: The motor body (1) further comprises an end cover (16), and one end of the motor housing (11) is detachably connected to one of the end cover (16) and the adapter (21) in an alternative manner; When the motor housing (11) is connected to the end cover (16), the switching mechanism (2) and the temperature measuring element are separated from the motor body (1).

5. The calibration motor according to claim 2, characterized in that: An oil inlet (114) is provided on the outer wall of the motor housing (11); a first oil passage (115) communicating with the oil inlet (114) is provided inside the housing wall of the motor housing (11); a second oil passage (211) communicating with the first oil passage (115) is provided on the adapter (21); a first oil hole (123) communicating with the first cavity (121) is provided on the motor shaft (12); and the first oil hole (123) is provided at a position corresponding to a support bearing (15) of the motor shaft (12). The adapter shaft (22) is provided with a second oil hole (222), the liquid inlet end and the liquid outlet end of the second oil hole (222) are respectively connected to the second oil passage (211) and the second cavity (221), and the cooling oil flowing in from the oil inlet (114) flows to the support bearing (15) through the first oil passage (115), the second oil passage (211), the second oil hole (222), the second cavity (221), the first cavity (121) and the first oil hole (123) in sequence.

6. The calibration motor according to claim 5, characterized in that: One end of the motor shaft (12) for connecting with the adapter shaft (22) is inserted into the second cavity (221); the motor shaft (12) is provided with a third oil hole (124) coaxially arranged with the second oil hole (222); and the liquid inlet end and the liquid outlet end of the third oil hole (124) are respectively connected with the liquid outlet end of the second oil hole (222) and the first cavity (121); the cooling oil flowing in from the oil inlet (114) enters the first cavity (121) in sequence through the first oil channel (115), the second oil channel (211), the second oil hole (222) and the third oil hole (124), and flows from the first oil hole (123) to the support bearing (15).

7. The calibration motor according to claim 5, characterized in that: The transfer mechanism (2) further comprises two first seals (25), the two first seals (25) being respectively sleeved on the transfer shaft (22) and located between the transfer shaft (22) and the transfer seat (21), the transfer seat (21) and the transfer shaft (22) forming a dynamic seal through the two first seals (25), and the liquid outlet end of the second oil passage (211) and the second oil hole (222) are both located between the two first seals (25).

8. The calibration motor according to claim 5, characterized in that: The adapter mechanism (2) further comprises a second sealing member (26), the second sealing member (26) being arranged between the adapter seat (21) and the motor housing (11) and being located at a connection point between the first oil passage (115) and the second oil passage (211), the adapter seat (21) and the motor housing (11) being arranged to be sealed and connected at the second sealing member (26).

9. The calibration motor according to claim 1, characterized in that: The switching mechanism (2) further comprises a transmission key (23), and the motor shaft (12) and the switching shaft (22) are used for transmission connection via the transmission key (23); And / or, the adapter mechanism (2) further comprises a bearing (27), and the adapter shaft (22) is rotatably connected to the adapter seat (21) via the bearing (27).

10. A vehicle, characterized in that: Comprising a calibration motor as described in any one of claims 1-9.

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