Motor assembly

Abstract

A motor assembly comprises a motor body and a driver. The motor body comprises a bus connecting piece. The driver comprises a substrate, a heating element, an encoder, a metal elastic piece, a fastener and a driver shell. The substrate comprises a first side surface and a second side surface, and the first side surface and the second side surface are opposite surfaces. The heating element is arranged on the first side face of the substrate and faces the driver shell, and the encoder and the metal elastic piece are arranged on the second side face of the substrate and face the end portion of the motor body. The substrate and the bus connecting piece of the motor body are assembled through the fastener, and the convex part of the driver shell is attached to the heating element of the substrate, so that the motor body and the driver form an integrated motor assembly, and the assembling process is simplified. The structure of the motor assembly can absorb assembly tolerance, reduce vibration interference and improve heat dissipation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to a motor assembly, and more particularly to a motor assembly with integrated motor and driver. BACKGROUND

[0002] As the application of motor is becoming more and more diversified, accurately controlling the operation of the motor is no longer the only consideration of market demand. The concept of predictive maintenance gradually becomes one of the considerations of the demander. If further information from the sensor can be obtained, or a certain amount of information is needed to predict the condition of the motor, it can help users to effectively prevent disasters in advance and reduce costs.

[0003] In the prior art, the motor is generally divided into a motor body and a driver. The power board and the control board arranged in the driver are manufactured separately. The power board includes a filter circuit, a rectifier circuit, and electronic components. The control board includes a microprocessor, an inverter circuit, an input / output interface circuit, and electronic components. The electrical connection between the power board and the control board often requires the use of matching connectors. The increasing number of parts increases the overall size of the motor, and the assembly of a large number of parts in the motor reduces the heat dissipation efficiency and affects the performance of the motor. The motor system is becoming more and more complex. In general, in the face of the growing demand of users for predictive maintenance functions, it is a current trend to reserve space for sensing elements. Furthermore, it is crucial to place the sensing elements in the appropriate position of the motor, which directly affects the accuracy of the data and the stability of the system operation. The complex electrical connection between the motor body and the driver is also an obstacle to the breakthrough of motor technology.

[0004] Therefore, it is necessary to provide an integrated motor assembly to solve the shortcomings of the prior art. SUMMARY

[0005] The purpose of the present application is to provide an integrated motor assembly. The metal spring is arranged on the driver substrate, and the bus of the motor body is electrically connected to the substrate by the fastener. The structure design of the metal spring effectively absorbs the assembly tolerance and reduces the vibration amplitude of the motor operation. The structure design of the metal spring and the fastener can reduce the number of parts used, reduce the assembly process, and realize the integrated motor assembly.

[0006] Another purpose of the present application is to provide an integrated motor assembly, which integrates control elements, power elements, and sensing elements on the conductive substrate, improves the utilization rate of the driver space, and sets the sensing elements in the optimal measurement position to reduce the interference of the heat energy or electromagnetic effect generated by other elements on the sensing elements.

[0007] Another purpose of the present application is to provide an integrated motor assembly, by corresponding arrangement of the convex part of the driver housing and the heat generating element on the substrate, the generated heat energy is dissipated outwardly in the shortest heat dissipation path, improving the stability of the internal operating temperature of the motor.

[0008] To achieve the foregoing purposes, the present application provides an integrated motor assembly, comprising a motor body and a driver. The motor body includes an end portion and at least one bus connector, wherein the end portion is arranged along an axial direction, and the at least one bus connector is arranged on the end portion. The driver is arranged along the axial direction and detachably connected to the end portion of the motor body, and includes a substrate, a plurality of heat generating elements, an encoder, at least one metal spring, at least one fastener and a driver housing. The substrate has a first side, a second side and at least one first through hole, the first side and the second side are arranged opposite to each other, and the second side is spatially opposite to the end portion of the motor body. The plurality of heat generating elements are arranged on the first side of the substrate. The encoder is arranged on the second side of the substrate. The at least one metal spring is arranged on the second side of the substrate and annularly arranged on the substrate. The at least one fastener is arranged corresponding to the at least one metal spring, and the at least one metal spring is engaged with the at least one bus connector through the at least one first through hole of the substrate by the at least one fastener. The driver housing includes an inner side and at least one convex part, the inner side and the first side of the substrate spatially face each other. The at least one convex part is arranged on the inner side and arranged along the axial direction and in contact with the at least one heat generating element.

[0009] In an embodiment of the present application, the fastener includes a connecting part for engaging the metal spring and the bus connector.

[0010] In an embodiment of the present application, the metal spring includes a spring body, a spring arm and a bending part, the spring body is arranged along a first side of the bending part and electrically connected to the substrate, the spring arm is arranged along a second side of the bending part and electrically connected to the bus connector, wherein the first side and the second side are located on opposite sides of the bending part, the spring body and the spring arm are arranged along the axial direction, and the connecting part engages the spring arm and the bus connector.

[0011] In an embodiment of the present application, the spring body further includes a second through hole, the spring arm further includes a third through hole, and the connecting part of the fastener engages the third through hole and the bus connector through the second through hole, wherein the first through hole, the second through hole and the third through hole are arranged corresponding along the axial direction.

[0012] In an embodiment of the present application, the fastener further includes a head connected to the connecting part, the head passes through the first through hole of the substrate and the second through hole of the spring body, and abuts against the spring arm.

[0013] In an embodiment of the present application, the fastener further comprises a head connected to the connecting portion, the head comprises an abutting surface, and the abutting surface is engaged with an inner surface of the elastic arm.

[0014] In an embodiment of the present application, the bending portion of the metal elastic sheet further comprises a tightening portion, and the tightening portion is arranged at a third side and a fourth side of the bending portion, wherein the third side and the fourth side are arranged at opposite sides of the bending portion.

[0015] In an embodiment of the present application, the bending portion further comprises a protruding portion, the protruding portion is arranged along the axial direction and protrudes towards a direction facing the motor body, wherein the protruding portion is higher than an outer surface of the elastic arm, and the outer surface and the inner surface of the elastic arm are opposite surfaces.

[0016] In an embodiment of the present application, each of the at least one first through hole has a first through hole diameter d1, the second through hole has a second through hole diameter d2, the third through hole has a third through hole diameter d3, and d3 < d2 = d1.

[0017] In an embodiment of the present application, each of the at least one fastener further comprises a head connected to the connecting portion, the connecting portion comprises a connecting portion outer diameter od1, the head comprises a head outer diameter od2, and od1 ≤ d3 < od2 < d2 = d1.

[0018] In an embodiment of the present application, the convex portion of the driver housing further comprises a heat conduction sheet, the heat conduction sheet comprises an upper surface and a lower surface opposite to each other and arranged along the axial direction, wherein the upper surface is connected to the convex portion of the driver housing, and the lower surface is connected to the heating element.

[0019] In an embodiment of the present application, the driver housing further comprises a plurality of heat dissipation fins arranged on an outer side surface of the driver housing, wherein the outer side surface and the inner side surface are opposite surfaces.

[0020] In an embodiment of the present application, the motor body comprises a stator and a rotor, the rotor is arranged in the stator, the at least one bus connector is arranged on the stator and electrically connected to the stator.

[0021] In an embodiment of the present application, the at least one heating element comprises at least one power unit, wherein each of the power unit comprises a plurality of control units and a plurality of power supply units and is electrically connected to the substrate.

[0022] In an embodiment of the present application, the at least one heating element comprises at least one capacitor and is electrically connected to the substrate. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1A structural schematic diagram of a motor assembly of the present case;

[0024] Figure 2A An exploded structural diagram of a motor assembly of the present case;

[0025] Figure 2B An exploded structural diagram of a motor assembly of the present case from another perspective;

[0026] Figure 3A An exploded structural diagram of a driver of the present case;

[0027] Figure 3B An exploded structural diagram of a driver of the present case from another perspective;

[0028] Figure 4 A structural schematic diagram of a fastener of the present case;

[0029] Figure 5A A structural schematic diagram of a metal spring of the present case;

[0030] Figure 5B A structural schematic diagram of a metal spring of the present case from another perspective;

[0031] Figure 6A A structural sectional view of a motor assembly of the present case;

[0032] Figure 6B A P1 partial enlarged view of a structural sectional view of a motor assembly of the present case;

[0033] Figure 6C A P2 partial enlarged view of a structural sectional view of a motor assembly of the present case.

[0034]

Symbol Description

[0035] 1: Motor assembly

[0036] 10: Motor body

[0037] 11: End portion

[0038] 12: Busbar connector

[0039] 13: Stator

[0040] 14: Rotor

[0041] 20: Driver

[0042] 21: Base plate

[0043] 21a: First side surface

[0044] 21b: Second side surface

[0045] 211: First through hole

[0046] 22a: power element

[0047] 22b: capacitor

[0048] 23: encoder

[0049] 24: metal spring

[0050] 241: spring body

[0051] 241a: spring body outer surface

[0052] 2411: second through hole

[0053] 242: spring arm

[0054] 242a: spring arm outer surface

[0055] 242b: spring arm inner surface

[0056] 2421: third through hole

[0057] 243: bent portion

[0058] 243a: first side

[0059] 243b: second side

[0060] 243c: third side

[0061] 243d: fourth side

[0062] 243e: raised portion

[0063] 244: pinched portion

[0064] 25: fastener

[0065] 251: joining portion

[0066] 252: head

[0067] 252a: bearing surface

[0068] d1: first through hole diameter

[0069] d2: second through hole diameter

[0070] d3: third through hole diameter

[0071] od1: joining portion outer diameter

[0072] od2: head outer diameter

[0073] 26: driver housing

[0074] 26a: inner side

[0075] 26b: outer side

[0076] 261: protrusion

[0077] 262: heat conducting sheet

[0078] 262a: upper surface

[0079] 262b: lower surface

[0080] 263: heat dissipation fin

[0081] A: axial direction DETAILED DESCRIPTION

[0082] Some exemplary embodiments embodying features and advantages of the present application are described in detail below. It should be appreciated that the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like reference numerals indicate like elements in the drawings. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting. For example, as used herein, the articles "a", "an", "the", and "at least one" are intended to mean that there is one or more of the elements in the preceding descriptions. In addition, as used herein, the conjunction "and" is intended to mean both "and" and "or" unless specifically stated otherwise. Further, as used herein, the terms "comprises", "comprising", "includes", "including" and the like are intended to be open-ended terms that specifically permit the occurrence of additional elements not only in the process of making, using, selling, importing or licensing the compositions or methods but also in the products made by the process. Any such additional elements are not excluded by the presence of the terms "comprises", "comprising", "includes", "including" and the like. In addition, it should be understood that expressions, such as "first", "second", "upper", "lower", "above", "below", "top", "bottom", and the like, are used for clarity in only referring to the context of the specific embodiments to which the term is used. No preference is intended by use of these terms. For example, a first component could be termed a second component, and, similarly, a second component could be termed a first component without departing from the scope of the embodiments. It is also to be understood that the use of relational terms, such as "top", "bottom", "front", "back", "leading", "trailing", and the like, are used for clarity in only referring to the context of the specific embodiments to which the term is used. No preference is intended by use of these terms.

[0083] Please refer to Figure 1 , Figure 2A , Figure 2B , Figure 3A and Figure 3BThe motor assembly 1 includes a motor body 10 and a driver 20. The motor body 10 includes an end portion 11 and at least one busbar connector 12. The end portion 11 is disposed along an axial direction A, and the at least one busbar connector 12 is disposed on the end portion 11. The driver 20 is disposed along the axial direction A and detachably connected to the end portion 11 of the motor body 10. The driver 20 includes a substrate 21, at least one heat-generating element (such as a power element 22a or a capacitor 22b), an encoder 23, at least one metal spring 24, at least one fastener 25, and a driver housing 26. The substrate 21 has a first side 21a, a second side 21b, and at least one first through hole 211. The first side 21a and the second side 21b are opposite sides, and the second side 21b is spatially opposite to the end portion 11 of the motor body 10. The power elements 22a and the capacitors 22b are disposed on the first side 21a of the substrate 21. The encoder 23 is disposed on the second side 21b of the substrate 21. The at least one metal spring 24 is disposed on the second side 21b of the substrate 21 and encircles the substrate 21. The at least one fastener 25 is disposed corresponding to the at least one metal spring 24, and the at least one metal spring 24 is engaged with the at least one busbar connector 12 through the at least one first through hole 211 of the substrate 21 by the at least one fastener 25. The driver housing 26 includes an inner side 26a and at least one protrusion 261. The inner side 26a spatially faces the first side 21a of the substrate 21. The at least one protrusion 261 is disposed on the inner side 26a, and the at least one protrusion 261 is disposed along the axial direction A and abuts the power elements 22a or the capacitors 22b.

[0084] Please refer to Figure 3A and Figure 3BIn one embodiment, the substrate 21 is a printed circuit board, and the power elements 22a or the capacitors 22b having the heat generating characteristics are arranged on the first side 21a of the substrate 21. The first side 21a is the side of the substrate 21 facing the direction from the motor body 10 to the driver 20 in the axial direction A. The power elements 22a or the capacitors 22b are arranged on the first side 21a of the substrate 21 in correspondence with the protrusions 261 of the driver housing 26 in the axial direction A. The heat generated by the power elements 22a or the capacitors 22b can be transferred outward along the protrusions 261 of the driver housing 26, effectively shortening the heat dissipation path and improving the heat dissipation efficiency. Compared with the prior art, the power elements 22a or the capacitors 22b having different functions are arranged on different printed circuit boards, and the printed circuit boards are connected by connectors. This results in an increase in the overall size of the driver 20, which limits the application field. It should be noted that in the prior art, the power elements 22a or the capacitors 22b are not effectively arranged on the substrate 21 close to the heat dissipation surface in the direction, and the heat generated by the power elements 22a or the capacitors 22b lingers in the interior of the driver housing 26 for a long time, which cannot effectively dissipate the heat and affects the operation of the electronic elements, causing the service life of the electronic elements to be reduced and the stability of the overall motor operation to be decreased. The heat transfer direction of the present application is directly transferred to the outside of the driver housing 26 through the protrusions 261, which has better heat dissipation efficiency.

[0085] Since the power elements 22a or the capacitors 22b are arranged on the first side 21a of the substrate 21, the second side 21b of the substrate 21 has sufficient space to properly arrange the position of the encoder 23. In one embodiment, the encoder 23 is arranged on the second side 21b of the substrate 21, and is preferably arranged at the middle point of the substrate 21, but is not limited thereto. It should be noted that the second side 21b of the substrate 21 is arranged to face the end portion 11 of the motor body 10 in the space, and the second side 21b of the substrate 21 is closest to the motor body 10, so that the data measured by the encoder 23 is more accurate. Since the second side 21b of the substrate 21 is not arranged with heat generating elements, the operation of the encoder 23 is relatively not disturbed by heat and electromagnetic induction, so that the operation of the encoder 23 is stable, and the service life of the encoder 23 is prolonged.

[0086] Please refer to Figure 3A and Figure 3BIn this embodiment, the metal spring 24 has 6 pieces, but not limited to. The metal spring 24 is disposed on the second side 21b of the substrate 21 and around the substrate 21. In this embodiment, the fastener 25 has 6 pieces, the bus connector 12 has 6 pieces, and the first through hole 211 has 6 pieces, but not limited to. The corresponding metal spring 24 and the corresponding bus connector 12 are engaged through the first through hole 211 of the substrate 21 by the fastener 25 to achieve electrical connection. The use of other parts is reduced, and the assembly process is reduced.

[0087] Please refer to Figure 2A and Figure 4 . Each of the at least one fastener 25 includes a joint portion 251 and a head portion 252, and the joint portion 251 and the head portion 252 are connected. The at least one metal spring 24 and the at least one bus connector 12 are engaged through the joint portion 251.

[0088] Please refer to Figure 5A . Each of the at least one metal spring 24 includes a spring body 241, a spring arm 242, and a bent portion 243. The spring body 241 is disposed along the first side edge 243a of the bent portion 243, and the spring body 241 is electrically connected to the substrate 21. The spring arm 242 is disposed along the second side edge 243b of the bent portion 243, and the spring arm 242 is electrically connected to one of the at least one bus connector 12, the first side edge 243a and the second side edge 243b being on opposite sides of the bent portion 243. The spring body 241 and the spring arm 242 are spaced apart along the axial direction A. The spring arm 242 and one of the at least one bus connector 12 are engaged through the joint portion 251. In an embodiment, the bent portion 243 of the metal spring 24 is bent in a similar U-shaped manner at an angle of 180 degrees, so that the first side edge 243a and the second side edge 243b of the bent portion 243 are directed in the same direction, which is perpendicular to the axial direction A. The spring body 241 and the spring arm 242 disposed along the first side edge 243a and the second side edge 243b, respectively, form two structures parallel to each other, and the spring body 241 is above the spring arm 242 along the axial direction A. There is a spacing distance between the spring body 241 and the spring arm 242, which allows the metal spring 24 to be buffered and absorb assembly tolerance when subjected to force from the axial direction A, further reducing noise. Furthermore, it reduces the deformation damage to the substrate 21 caused by stress. Further, the spring body 241 of each of the at least one metal spring 24 includes a spring body outer surface 241a, and the spring body outer surface 241a is attached to the second side 21b of the substrate 21. Please refer to Figure 2A and Figure 2BThe elastic arm 242 comprises an elastic arm outer surface 242a, and the elastic arm outer surface 242a is attached to the at least one busbar connecting piece 12. In an embodiment, the elastic sheet body outer surface 241a is disposed on the second side 21b of the substrate 21 in an SMT manner, but the present application is not limited thereto. In other embodiments, the elastic sheet body 241 is disposed on the substrate 21 by a DIP, press fit, or male-female connector docking manner, and the like, without departing from the scope of the present application.

[0089] Please refer to Figure 3A 、 Figure 3B 、 Figure 5A and Figure 5B The elastic sheet body 241 comprises a second through hole 2411, and the elastic arm 242 comprises a third through hole 2421. The second through hole 2411 and the third through hole 2421 are disposed in correspondence along the axial direction A. The engaging portion 251 of each of the at least one fastener 25 passes through the corresponding second through hole 2411, and is engaged with the third through hole 2421 and the at least one busbar connecting piece 12. That is, the first through hole 211, the second through hole 2411, and the third through hole 2421 are disposed in correspondence. In the present embodiment, each of the at least one first through hole 211 of the substrate 21 has a first through hole diameter d1, the second through hole 2411 has a second through hole diameter d2, the third through hole 2421 has a third through hole diameter d3, and d3 Figure 4 Please refer to and

[0090] In the present embodiment, the substrate 21, the metal elastic sheet 24, and the busbar connecting piece 12 are sequentially stacked in the axial direction A of the driver 20 toward the motor body 10. Please refer to Figure 6A and Figure 6B In the present embodiment, the substrate 21, the metal elastic sheet 24, and the busbar connecting piece 12 are sequentially stacked in the axial direction A of the driver 20 toward the motor body 10. Please refer to Figure 3A and Figure 5AThe first through hole 211, the second through hole 2411 and the third through hole 2421 of each metal spring 24 correspond to each other in the axial direction A. During the locking process of the fastener 25, the head 252 of the fastener 25 passes through the first through hole 211 of the substrate 21 and the second through hole 2411 of the spring body 241 of the metal spring 24, and abuts against the spring arm inner surface 242b of the spring arm 242. In the present embodiment, the first through hole diameter d1 of the substrate 21 is equal to the second through hole diameter d2 of the spring body 241 (d1 = d2), but is not limited thereto. The engagement of the engaging portion 251 of the fastener 25 with the spring arm 242 of the metal spring 24 and the busbar connector 12 makes the electrical connection more stable. In the present embodiment, the engaging portion outer diameter od1 of the fastener 25 is related to the third through hole diameter d3 of the spring arm 242 as od1 ≤ d3, but is not limited thereto.

[0091] It is worth noting that the head 252 of each of the at least one fastener 25 comprises an abutting surface 252a. The abutting surface 252a is in contact with a spring arm inner surface 242b of the spring arm 242. The engaging portion 251 of each of the at least one fastener 25 is engaged with the corresponding busbar connector 12. In the present embodiment, the abutting surface 252a is provided to increase the contact area between the metal spring 24 and the busbar connector 12, thereby enhancing the stability of the electrical connection.

[0092] Please refer to Figure 5A and 5B The bending portion 243 of each of the at least one metal spring 24 comprises a constriction portion 244. The constriction portion 244 is arranged at a third side edge 243c and a fourth side edge 243d of the bending portion 243, and the third side edge 243c and the fourth side edge 243d are arranged at opposite sides of the bending portion. In the present embodiment, there are two constriction portions 244 arranged at the third side edge 243c and the fourth side edge 243d of the bending portion 243, respectively. It should be particularly noted that the two constriction portions 244 have the same profile and are symmetrically arranged, and the elastic strength of the metal spring 24 is adjusted by the constriction portions 244. In other words, the elastic strength can be adjusted without replacing the metal spring 24 with different thickness or replacing the material.

[0093] Please refer to Figure 5AThe bending portion 243 comprises a protruding portion 243e. The protruding portion 243e protrudes in the axial direction A, i.e. the protruding portion 243e protrudes towards the motor body 10, and the protruding portion 243e is higher than the outer arm surface 242a of the arm 242, which is opposite to the inner arm surface 242b. In this embodiment, one side of the protruding portion 243e is connected to the bending portion 243, and the other side is connected to the arm 242. The protruding portion 243e can prevent the metal spring 24 from being compressed too much when the metal spring 24 is subjected to a force in the axial direction A, so as to prevent the metal spring 24 from being fatigued, and so as to keep the motor assembly 1 in a stable environment.

[0094] Please refer to Figure 3A 、 Figure 3B 、 Figure 6A and Figure 6C . Each of the at least one protrusion 261 of the driver housing 26 comprises a heat conduction sheet 262. The heat conduction sheet 262 comprises an upper surface 262a and a lower surface 262b. The upper surface 262a and the lower surface 262b are arranged in the axial direction A and are opposite to each other, and the upper surface 262a of the heat conduction sheet 262 is connected to one of the at least one protrusion 261 of the driver housing 26, and the lower surface 262b of the heat conduction sheet 262 is connected to the power element 22a or the capacitor 22b. In this embodiment, there are two heat conduction sheets 262, and the heat conduction sheets 262 are attached to the positions of the two protrusions 261 of the driver housing 26. The heat conduction sheets 262 are arranged between the power element 22a or the capacitor 22b and the protrusion 261, so as to enhance the heat conduction effect, and so as to more efficiently conduct the heat generated by the operation of the power element 22a or the capacitor 22b to the outside of the driver housing 26.

[0095] Please refer to Figure 6C . The driver housing 26 comprises a plurality of heat dissipation fins 263 arranged on the outer side surface 26b of the driver housing 26, which is opposite to the inner side surface 26a. The heat dissipation fins 263 are arranged on the outer side surface of the driver housing 26, so as to increase the surface area of the heat exchange with the external environment. The heat generated by the heat generating element is first conducted to the heat conduction sheet 262, then to the protrusion 261 of the driver housing 26, and then to the heat dissipation fins 263 arranged on the outer side surface 26b of the driver housing 26, and then to the external environment, so as to form a continuous heat conduction path, and so as to accelerate the heat dissipation effect.

[0096] Please refer to Figure 2A and Figure 2BThe motor body 10 comprises a stator 13 and a rotor 14 arranged in the stator 13. In this embodiment, the busbar connecting piece 12 is arranged on the stator 13, one end surface of the busbar connecting piece 12 is connected to the stator 13, and the other end of the busbar connecting piece 12 is attached to the elastic arm 242 of the metal elastic sheet 24 to achieve electrical connection. The elastic arm 242 of the metal elastic sheet 24 is connected to the busbar connecting piece 12 by the fastener 25, so that the connection strength is firm and the electrical connection effect is stable.

[0097] Please refer to Figure 3A The plurality of heat generating elements includes a plurality of power elements 22a, wherein the plurality of power elements 22a further comprises a plurality of control units and a plurality of power supply units, and the plurality of control units and the plurality of power supply units are electrically connected to the substrate 21. In some embodiments, the plurality of heat generating elements includes a plurality of capacitors 22b, which are electrically connected to the substrate 21

[0098] In summary, the motor assembly of the present application is provided. The metal elastic sheet of the driver is arranged on the substrate, and the elastic arm of the metal elastic sheet is attached to the busbar connecting piece to achieve electrical connection. The metal elastic sheet and the busbar connecting piece are engaged by the fastener, which makes the electrical connection between the substrate and the busbar connecting piece more stable, reduces the number of parts, and simplifies the assembly process. Further, the stability of the electrical connection is improved by the bearing surface of the fastener. The profile and structure design of the metal elastic sheet not only absorbs the assembly tolerance and buffers the vibration interference of the motor operation, but also prevents the elastic properties of the metal elastic sheet from being permanently deformed due to excessive stress by the structure of the raised part of the bending part of the metal elastic sheet. The heat generating elements and the sensing elements are arranged on the same substrate, which reduces the number of parts of the driver and reduces the volume of the motor assembly. The heat generating elements are arranged on the first side of the substrate facing the driver housing, which shortens the heat dissipation path and improves the heat dissipation effect. Furthermore, because the sensing elements are arranged on the other side of the substrate and close to the center of the rotor, the accuracy of the sensing elements in receiving and transmitting signals can be improved. The metal elastic sheet is arranged around the substrate, which further ensures that the metal elastic sheet and the sensing elements maintain a safe distance from electromagnetic interference. Because the sensing elements and the heat generating elements are arranged on opposite sides of the substrate, the sensing elements are less affected by environmental heat and electromagnetic interference. The protrusions on the inner side of the driver housing are arranged corresponding to the heat generating elements on the substrate, which effectively guides the heat energy generated by the heat generating elements to the outside of the driver housing. The heat dissipation fins on the outside of the driver housing further increase the surface area of the heat exchange on the outside of the driver housing, improving the heat dissipation effect. Furthermore, the heat conducting sheet is arranged between the heat generating elements and the protrusions on the inner side of the driver housing, which increases the guidance of heat energy and achieves the purpose of integrated heat dissipation of the motor assembly.

[0099] The present application can be modified by those skilled in the art without departing from the scope of the claims.

Claims

1. A motor assembly, characterized in that, Include: A motor body includes an end portion and at least one bus connector, wherein the end portion is disposed along an axial direction and the at least one bus connector is disposed at the end portion; and A driver, disposed along the axial direction and detachably connected to the end of the motor body, includes: A substrate has a first side surface, a second side surface and at least a first through hole, the first side surface and the second side surface are disposed opposite to each other, and the second side surface is spatially relative to the end of the motor body; At least one heating element is disposed on the first side; An encoder is disposed on the second side; At least one metal spring is disposed on the second side and surrounds the substrate; At least one fastener is provided corresponding to the at least one metal spring, and the at least one metal spring is engaged with the corresponding at least one bus connector through the at least one first through hole of the substrate via the at least one fastener; as well as A driver housing includes an inner side surface and at least one protrusion. The inner side surface faces the first side surface of the substrate in space. The at least one protrusion is disposed on the inner side surface and is attached to the at least one heating element along the axial direction.

2. The motor assembly as described in claim 1, characterized in that, The fastener includes a coupling portion that engages the metal spring with the bus connector.

3. The motor assembly as described in claim 2, characterized in that, The metal spring includes a spring body, a spring arm, and a bent portion. The spring body extends along a first side of the bent portion and is electrically connected to the substrate. The spring arm extends along a second side of the bent portion and is electrically connected to the bus connector. The first side and the second side are located on opposite sides of the bent portion. The spring body and the spring arm are spaced apart along the axial direction. The connecting portion engages the spring arm with the bus connector.

4. The motor assembly as described in claim 3, characterized in that, The spring body also includes a second through hole, and the spring arm also includes a third through hole. The fastener's engagement portion engages with the third through hole and the bus connector through the second through hole, wherein the first through hole, the second through hole, and the third through hole are correspondingly arranged along the axial direction.

5. The motor assembly as described in claim 4, characterized in that, The fastener also includes a head connected to the joint, the head passing through the first through hole of the substrate and the second through hole of the spring body, and abutting against the spring arm.

6. The motor assembly as described in claim 3, characterized in that, The fastener also includes a head that connects to the joint, the head including a bearing surface that engages with an inner surface of the spring arm.

7. The motor assembly as described in claim 3, characterized in that, The bent portion of the metal spring also includes a compression portion disposed on a third side and a fourth side of the bent portion, wherein the third side and the fourth side are disposed on corresponding sides of the bent portion.

8. The motor assembly as described in claim 6, characterized in that, The bending portion also includes a raised portion extending along the axial direction and rising in a direction facing the motor body, wherein the raised portion is higher than the outer surface of the spring arm, and the outer surface of the spring arm and the inner surface of the spring arm are opposite sides.

9. The motor assembly as described in claim 4, characterized in that, Each of the at least one first through hole has a first through hole diameter d1, the second through hole has a second through hole diameter d2, and the third through hole has a third through hole diameter d3, and d3 <d2=d1。 10. The motor assembly as described in claim 2, characterized in that, Each of the at least one fastener further includes a head connected to the mating portion, the mating portion including a mating portion outer diameter od1, the head including a head outer diameter od2, and od1 ≤ d3. <od2<d2=d1。 11. The motor assembly as claimed in claim 1, characterized in that, The protrusion of the driver housing also includes a heat-conducting plate, which has an upper surface and a lower surface opposite to each other disposed along the axial direction, wherein the upper surface is connected to the protrusion of the driver housing and the lower surface is connected to the heating element.

12. The motor assembly as described in claim 1, characterized in that, The driver housing also includes multiple heat dissipation fins disposed on an outer side of the driver housing, wherein the outer side is opposite to the inner side.

13. The motor assembly as described in claim 1, characterized in that, The motor body includes a stator and a rotor, the rotor being disposed within the stator, and at least one bus connector being disposed on the stator and electrically connected to the stator.

14. The motor assembly as described in claim 1, characterized in that, The at least one heating element includes at least one power unit, wherein each power unit includes multiple control units and multiple power supply units, and is electrically connected to the substrate.

15. The motor assembly as described in claim 1, characterized in that, The at least one heating element includes at least one capacitor and is electrically connected to the substrate.

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