Motor and circuit board

Abstract

The application relates to a motor and a circuit board. The motor comprises a stator, a rotor, a slot and a sensor assembly; the motor is of an outer stator and inner rotor structure, the slot is arranged on the inner circumferential wall of the stator; or the motor is of an outer rotor and inner stator structure, the slot is arranged on the outer circumferential wall of the stator; the sensor assembly comprises a circuit board and a power supply line, the circuit board is at least partially inserted into the slot and is fixedly inserted in the slot, and the power supply line is connected with the circuit board. The motor has the slot arranged on the stator, the circuit board can be inserted into the slot, and the circuit board can be basically fixed. Thus, during the motor assembly process, only the action of insertion is needed to install the circuit board on the stator, the circuit board will not be inclined due to the gravity of the power supply line and other factors, and the sensor assembly will not fall off from the stator. Therefore, the motor in the application has simple assembly operation during assembly, is less prone to errors, has higher success rate, and is easy to realize higher assembly efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine and a circuit board. BACKGROUND

[0002] As one of the most common driving devices, electric machines are widely used in various devices and equipment including air conditioners. In air conditioning equipment, PG electric machines are a commonly used type of electric machine.

[0003] A PG electric machine mainly includes a stator, a Hall assembly, a rotor, an end cover and the like. In assembling a PG electric machine, the general operation process is as follows: first, the rotor is placed into the stator; thereafter, the circuit board of the Hall assembly is placed at the recess on the stator; finally, the end cover is pressed into the stator, and the end cover will be pressed on the circuit board to fix the circuit board.

[0004] In the prior art, the circuit board of the Hall assembly is generally rectangular, and the four corners serve as supporting surfaces between the stator and the end cover to make the end cover flush. Since the circuit board of the Hall assembly cannot be fixed on the stator by itself, but needs to be fixed by the end cover in the subsequent step, the gravity of the power supply line connected with the circuit board of the Hall assembly will act on the circuit board before it is fixed by the end cover, which is likely to cause the circuit board to tilt and not stably fit in the recess on the stator, and further cause the entire Hall assembly to fall off the stator. In fact, in addition to the gravity of the power supply line, other external forces will also affect the circuit board of the Hall assembly to tilt and cause the Hall assembly to fall off.

[0005] In assembling a PG electric machine, in order to avoid the circuit board of the Hall assembly from tilting and causing the entire Hall assembly to fall off the stator, the assembly worker must continuously press the Hall assembly by hand to maintain the circuit board of the Hall assembly to stably fit on the stator before assembling the end cover, and at the same time, other subsequent assembly needs to be performed, which overall leads to high difficulty, high error-prone and low success rate in assembling the PG electric machine. SUMMARY

[0006] The present application provides an electric machine and a circuit board to solve the technical problems of high difficulty, high error-prone and low success rate in assembling the electric machine in the prior art.

[0007] The electric machine provided by the present application comprises a stator, a rotor, a slot and a sensor assembly; the electric machine is of an outer stator and inner rotor structure, the slot is arranged on the inner peripheral wall of the stator; or the electric machine is of an outer rotor and inner stator structure, the slot is arranged on the outer peripheral wall of the stator; the sensor assembly comprises a circuit board and a power supply line, the circuit board is at least partially inserted and fixed in the slot, and the power supply line is connected with the circuit board.

[0008] The motor has a first end and a second end along an axial direction of the rotor; the first end of the motor is provided with an end cover; the inner circumferential wall of the stator where the slot is located is provided with a boss protruding towards the radially inner side of the rotor, or the outer circumferential wall of the stator where the slot is located is provided with a boss protruding towards the radially outer side of the rotor; the boss has a first end face facing the first end of the motor and a second end face facing the second end of the motor; the first end face is used to support the end cover as a support surface of the end cover; the boss is circumferentially arranged on the inner circumferential wall or the outer circumferential wall of the stator and has a notch in the circumferential direction, and the slot is arranged at the notch.

[0009] When the circuit board is plugged into the slot, the surface of the circuit board facing the first end of the motor is coplanar with the first end face.

[0010] The motor is of an inner rotor and outer stator structure; the stator has an aperture on the end face of the stator, and the aperture is used to lead the power supply wire out from the inner side of the stator.

[0011] The slot is arranged adjacent to the aperture; and / or, the circuit board comprises an embedding part and a power supply connecting part, the embedding part is used to be inserted into the slot, the power supply connecting part is connected with the embedding part, and the power supply connecting part is used to connect the power supply wire; when the circuit board is plugged into the slot, the power supply connecting part is between the embedding part and the aperture.

[0012] A limiting structure is arranged in the slot, and the limiting structure fixes the circuit board in the slot.

[0013] The limiting structure comprises a first limiting part and a second limiting part, and the first limiting part and the second limiting part are respectively arranged at two ends of the slot in the width direction; the first limiting part and the second limiting part respectively have a groove or a protrusion shape; the part of the circuit board inserted into the slot has a first concave-convex matching part and a second concave-convex matching part, and the first concave-convex matching part and the second concave-convex matching part are respectively used to form a concave-convex matching limiting structure corresponding to the first limiting part and the second limiting part.

[0014] The first concave-convex matching part is semicircular, and the second concave-convex matching part is arc-shaped.

[0015] The first limiting part has a groove shape, and the groove comprises a first area and a second area; the first area is used for accommodating the first concave-convex matching part when the circuit board is inserted and fixed in the slot; the second area is located inside the first area; the first concave-convex matching part can rotate between the first area and the second area with the outer side wall of the groove of the first limiting part as a fulcrum; when the first concave-convex matching part rotates from the second area of the first limiting part to the first area, the second concave-convex matching part can be inserted into the slot from outside the slot under the action of force and buckled in the second limiting part.

[0016] The top end of the outer side wall of the groove of the first limiting part is a slope inclined to the opening direction of the slot.

[0017] The circuit board as a whole has a meniscus shape.

[0018] The circuit board comprises an embedded part and a power supply connecting part; the embedded part is used for being inserted into the slot provided on the motor stator; the power supply connecting part is connected with the embedded part and is used for connecting a power supply line.

[0019] The circuit board comprises a first side and a second side opposite to each other; the first side and the second side both have a curved shape towards a first direction, so that the first side has a convex shape and the second side has a concave shape; the embedded part is located on the first side of the circuit board.

[0020] The circuit board is provided with a first concave-convex matching part and a second concave-convex matching part; the first concave-convex matching part and the second concave-convex matching part are respectively used for forming a concave-convex matching limiting structure with a first limiting part and a second limiting part provided in the slot.

[0021] The first concave-convex matching part has a semicircular shape, and the second concave-convex matching part has an arc shape.

[0022] Compared with the prior art, the motor and the circuit board provided by the application have the following advantages:

[0023] The motor provided by this invention has slots on its stator, into which a circuit board can be partially inserted, thus securing the circuit board essentially. During motor assembly, only a single insertion action is required to install and essentially fix the circuit board to the stator. This prevents the circuit board from tilting due to factors such as the weight of the power cord, and also prevents the sensor assembly from falling off the stator. Compared to existing technologies, this invention eliminates a period during the entire motor assembly process when the sensor assembly's circuit board is unsecured. Therefore, the motor of this invention is simple to assemble, less prone to errors, has a higher success rate, and achieves greater assembly efficiency.

[0024] The circuit board provided by this invention, when applied to the aforementioned motor, has the same beneficial effects as the aforementioned motor during the process of assembling the circuit board into the motor, which will not be elaborated further. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the motor structure in an embodiment of the present invention;

[0028] Figure 2 for Figure 1 The diagram shows the structure of the stator in the motor.

[0029] Figure 3 for Figure 2 A schematic cross-sectional view of the stator shown.

[0030] Figure 4 for Figure 3 Enlarged diagram of section A in the middle;

[0031] Figure 5 for Figure 1 The diagram shows the structure of the sensor assembly in the motor.

[0032] Figure 6 This is a cross-sectional view of the sensor assembly and stator after assembly.

[0033] Figure 7 for Figure 6 Enlarged diagram of section B in the middle;

[0034] Figure 8 For Figure 1 a schematic diagram of an assembling process of the motor shown in the figure.

[0035] In the figure:

[0036] 10 - stator; 101 - slot; 102 - boss; 103 - gap; 104 - first limiting part; 105 - second limiting part;

[0037] 1041 - first area; 1042 - second area; 1043 - concave area; 1044 - inclined surface;

[0038] S1 - inner circumferential wall; S2 - outer circumferential wall;

[0039] 20 - sensor assembly; 21 - circuit board; 22 - power supply line;

[0040] 211 - embedding part; 212 - power supply connecting part; 213 - first concave-convex matching part; 214 - second concave-convex matching part. DETAILED DESCRIPTION

[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] The embodiments of the motor and the circuit board provided by the present application will be described below with reference to the drawings.

[0043] In an embodiment of the motor, referring to Figure 1 , the motor comprises a stator 10, a rotor (not shown in the figure), a slot 101 and a sensor assembly 20.

[0044] The motor in the embodiment can be an outer stator inner rotor structure, i.e. the stator 10 is annular, and the stator 10 is provided with an annular hole, and a rotor is sleeved in the annular hole; or the motor can be an outer rotor inner stator structure, i.e. the rotor is annular and has an annular hole, and the stator 10 is sleeved in the annular hole. In the following description of the motor in the embodiment, the technical solution of the motor will be described taking the outer stator inner rotor structure as an example; unless otherwise specified, the described technical solution of the motor is also applicable to the motor of the outer rotor inner stator structure; and the applicability of the technical solution to the motor of the outer rotor inner stator structure is known to those skilled in the art, and thus the embodiment will not be described here.

[0045] In the present embodiment, the slot 101 is provided on the inner circumferential wall S1 of the stator 10. In the case of a motor of outer stator and inner rotor structure, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , the inner circumferential wall S1 of the stator 10 is the side opposite to the rotor, therefore, the slot 101 is provided on the inner circumferential wall S1 of the stator 10, instead of being provided on the outer circumferential wall S2. In the case of a motor of outer rotor and inner stator structure, the slot 101 is provided on the outer circumferential wall S2 of the stator 10 (in this case, the stator 10 can only have the outer circumferential wall S2, without forming an annular hole and without having an inner circumferential wall S1).

[0046] In the present embodiment, as shown in Figure 5 and in combination with Figures 1 to 4 , the sensor assembly 20 comprises a circuit board 21 and a power supply line 22, the circuit board 21 is at least partially inserted into the slot 101 and is fixed by the slot 101, the power supply line 22 is connected with the circuit board 21 and extends along the stator 10 to outside of the stator 10. Specifically, the sensor assembly 20 can be a Hall assembly, which can be used to detect the position of the rotor.

[0047] In the present embodiment, the circuit board 21 can specifically comprise an embedded part 211 and a power supply connecting part 212; the embedded part 211 is the part of the circuit board 21 for insertion into the slot 101; the power supply connecting part 212 is located outside of the slot 101, the spatial position of the power supply connecting part 212 outside of the slot 101 is connected with the first end of the power supply line 22, the second end of the power supply line 22 is connected with an external power supply, through the power supply line 22, the external power supply can supply power to the circuit board. As shown in Figure 1 and Figure 2 , in the case of a motor of outer stator and inner rotor structure, the slot 101 is located on the inner circumferential wall S1 of the stator 10, the first end of the power supply line 22 is located in the annular hole of the stator 10, along the first end of the power supply line 22 to the second end, the power supply line 22 extends along the stator 10 to outside of the stator 10, to realize the connection between the second end of the power supply line 22 and the external power supply.

[0048] In this embodiment, the stator 10 is provided with a slot 101, and the circuit board 21 can be partially inserted into the slot 101 and fixed by insertion. By being inserted into the slot 101, the circuit board 21 can be substantially fixed. In this way, during the motor assembly process, only one insertion action is needed to install and substantially fix the circuit board 21 to the stator 10, and the circuit board 21 will not be tilted due to the gravity of the power cord 22 and other factors, nor will it cause the sensor assembly 20 to fall off the stator 10. Compared with the prior art, in this embodiment, there is no period of time during the entire motor assembly process in which the circuit board 21 of the sensor assembly 20 is in an unfixed state. Therefore, the motor in this embodiment is simple to assemble and less prone to errors during assembly, has a higher success rate, and is easy to achieve higher assembly efficiency.

[0049] In one embodiment of the motor, along the axial direction of the rotor (i.e., the axial direction of the ring hole of the stator 10 in FIGS. 1 and 2) Figure 1 and Figure 2 The stator 10 of the motor has a first end and a second end; the first end of the motor is provided with an end cover (not shown in the figure); the inner circumferential wall S1 of the stator 10 is provided with a boss 102 protruding radially inward, and the boss 102 has a first end face facing the first end of the motor and a second end face facing the second end of the motor, and the first end face is used to support the end cover as a support surface of the end cover.

[0050] The boss 102 is circumferentially arranged on the side of the stator 10 opposite the rotor, i.e., on the inner circumferential wall S1 of the stator 10, and circumferentially avoids the slot 101 to form a gap, and the slot 101 is arranged at the gap. In this way, the slot 101 and the boss 102 can be substantially flush in the axial direction of the rotor, i.e., if the axial direction of the rotor is taken as the vertical direction, the slot 101 and the boss 102 can be substantially on the same horizontal plane. In this embodiment, when the circuit board 21 is inserted into the slot 101, the surface of the circuit board 21 facing the first end of the motor is coplanar with the first end face. In this way, when the end cover is assembled to the stator 10, on the one hand, the circuit board 21 inserted into the slot 101 can support the end cover together with the boss 102, and on the other hand, a limiting relationship can be formed between the end cover and the circuit board 21, and the end cover can limit the movement of the circuit board 21 to some extent, reducing the probability of the circuit board 21 being pulled out of the slot 101.

[0051] In other embodiments of the motor, the position of the slot 101 can also be arranged so that the slot 101 deviates from the first end surface of the boss 102 or deviates from the boss 102 in the direction of the second end of the motor, so that the circuit board 21 is not coplanar with the first end surface of the boss 102 after being inserted into the slot 101. In this way, the circuit board 21 will not contact the end cover after being inserted into the slot 101, and the friction between the circuit board 21 and the end cover can be avoided, thereby preventing the devices on the circuit board 21 from being damaged due to friction.

[0052] In one embodiment of the motor, as shown in Figure 1 and Figure 2 , the motor has an inner rotor and outer stator structure. The stator 10 has an opening 103 on the end surface of the stator 10, which is used to lead the power supply wire 22 out from the inside of the stator 10. In this way, the routing of the power supply wire 22 is facilitated, and the power supply wire 22 can be routed without interfering with other structures of the motor.

[0053] Further, in one embodiment of the motor, the slot 101 is arranged adjacent to the opening 103. In this way, when the circuit board 21 is inserted into the slot 101, the end of the power supply wire 22 connected to the circuit board 21 is closer to the opening 103, which can reduce the length of the power supply wire 22 routed in the ring hole of the stator 10, further facilitating the routing of the power supply wire 22, and reducing interference with other structures.

[0054] In one embodiment of the motor, as described above, the circuit board 21 includes an embedded portion 211 and a power supply connection portion 212. The embedded portion 211 is used to be inserted into the slot 101, and the power supply connection portion 212 is connected to the embedded portion 211 and is used to connect the power supply wire 22. In this embodiment, when the circuit board 21 is inserted into the slot 101, the power supply connection portion 212 is between the embedded portion 211 and the opening 103. In this way, when the circuit board 21 is inserted into the slot 101, the power supply connection portion 212 is located closer to the opening 103, and the first end of the power supply wire 22 is also closer to the opening 103, so that the power supply wire 22 extends less in the ring hole of the stator 10, thereby facilitating the routing of the power supply wire 22, and also reducing interference between the power supply wire 22 and other structures.

[0055] In one embodiment of the motor, a limiting structure is arranged in the slot 101, which fixes the circuit board 21 in the slot 101. In this embodiment, the limiting structure can fix the circuit board 21 more firmly in the slot 101, avoiding the circuit board 21 from being pulled out of the slot 101. Specifically, as for the slot 101, a damper can be arranged therein, through which the circuit board 21 can have a substantially stable connection and fixing relationship with the slot 101 when being inserted into the slot 101. On this basis, the limiting structure further arranged in this embodiment can further improve the firmness of the insertion between the circuit board 21 and the slot 101, preventing the circuit board 21 from being pulled out of the slot 101. Of course, in this embodiment, the damper can not be arranged in the slot 101 when the limiting structure is arranged, and the firm insertion between the circuit board 21 and the slot 101 can be realized only by the limiting structure.

[0056] In one specific embodiment of the motor, the limiting structure includes a first limiting part 104 and a second limiting part 105, which are respectively arranged at both ends of the slot 101 along the width direction. The width direction of the slot 101 refers to the slot length direction of the slot 101 (the slot length direction refers to the position of the mouth of the slot 101, and the circuit board 21 is inserted into the slot 101 from the position of the mouth. After the circuit board 21 is inserted into the slot 101, the slot length direction of the slot 101 is perpendicular to the thickness direction of the circuit board 21. The direction in which the two sides of the slot 101 with relatively short distances on the slot length direction are opposite to each other is the thickness direction of the slot 101. For example, as shown in the figure, the up-down direction of the slot 101 is the width direction of the slot 101. Figure 4

[0057] The first limiting part 104 and the second limiting part 105 can respectively have a groove shape, or respectively have a protrusion shape, or one has a protrusion shape and the other has a groove shape; the part of the circuit board 21 inserted into the slot 101 (i.e. the embedded part 211) has a first concave-convex matching part 213 and a second concave-convex matching part 214, which are respectively used to form a concave-convex matching limiting structure corresponding to the first limiting part 104 and the second limiting part 105. It can be understood that when the first limiting part 104 is a protrusion, the first concave-convex matching part 213 corresponding thereto is a groove, and when the first limiting part 104 is a groove, the first concave-convex matching part 213 corresponding thereto is a protrusion; the second limiting part 105 and the second concave-convex matching part 214 are similar. Hereinafter, the first limiting part 104 and the second limiting part 105 are taken as examples to be described and explained, both of which have a groove shape, and the first concave-convex matching part 213 and the second concave-convex matching part 214 both have a protrusion shape.

[0058] ​In this embodiment, through the insertion and clamping of the first concave-convex matching part 213 and the first limiting part 104, and through the insertion and clamping of the second concave-convex matching part 214 and the second limiting part 105, the circuit board 21 can be fixed and limited at both ends in the width direction of the slot 101, and the circuit board 21 can be firmly fixed in the slot 101.

[0059] In this embodiment, the recess or protrusion shape of the first concave-convex matching part 213 on the circuit board 21 can specifically be semicircular, and the recess or protrusion shape required by the second concave-convex matching part 214 can specifically be arc-shaped. The first limiting part 104 can also be semicircular, and the second limiting part 105 can also be arc-shaped.

[0060] Specifically, in this embodiment, as shown in Figure 6 , Figure 7 and Figure 8 , when the circuit board 21 is inserted into the slot 101, one end (the upper end in Figure 5 ) of the embedded part 211 of the circuit board 21 can be first inserted into the slot 101, and the first concave-convex matching part 213 at this end is aligned with and inserted into the recess of the first limiting part 104, and then the insertion and clamping of the first concave-convex matching part 213 and the first limiting part 104 is maintained at this end, and the circuit board 21 is pushed in the direction of the slot 101 at the next end (the lower end in Figure 5 ), the second concave-convex matching part 214 of the embedded part 211 of the circuit board 21 is pushed into the slot 101, and is buckled with the recess of the second limiting part 105. In this way, the fixed and limited circuit board 21 only needs to be pushed into the slot 101 at both ends, and the process is simple, convenient and fast.

[0061] In the above embodiment, as shown in Figure 4 , the recess of the first limiting part 104 includes a first area 1041 and a second area 1042. The first area 1041 is used to accommodate the first concave-convex matching part 213 when the circuit board 21 is inserted and fixed in the slot 101; the second area 1042 is located inside the first area 1041. The first concave-convex matching part 213 can rotate between the first area 1041 and the second area 1042 with the outer side wall of the recess of the first limiting part 104 as the fulcrum; when the first concave-convex matching part 213 rotates from the second area 1042 to the first area 1041 of the first limiting part 104, the second concave-convex matching part 214 can be forced to be inserted into the slot 101 from outside the slot 101, and buckled in the second limiting part 105.

[0062] In this embodiment, the first limiting portion 104 is configured as follows: the groove of the first limiting portion 104 includes not only the first area 1041 which corresponds to the first convex-fitted portion 213 completely and is used to accommodate the first convex-fitted portion 213 completely (when the circuit board 21 is inserted into the slot 101 completely), but also a second area 1042 which is located inside the first area 1041. Through the above configuration, when the first convex-fitted portion 213 is inserted into the first limiting portion 104 first in the process of assembling the circuit board 21 to the slot 101, the first convex-fitted portion 213 can be inserted into the second area 1042 of the groove of the first limiting portion 104 first, and in this process, the end where the second convex-fitted portion 214 is located is outside the slot 101, which is convenient for holding, that is, the assembler can hold the end where the second convex-fitted portion 214 is located outside the slot 101 throughout the process, insert the first convex-fitted portion 213 into the slot 101, and snap it into the groove of the first limiting portion 104.

[0063] In this embodiment, the first convex-fitted portion 213 and the first limiting portion 104 are configured as follows: the first convex-fitted portion 213 can rotate between the first area 1041 and the second area 1042 with the outer side wall of the groove of the first limiting portion 104 as the fulcrum. The second convex-fitted portion 214 and the second limiting portion 105 are configured as follows: when the first convex-fitted portion 213 is rotated from the second area 1042 to the first area 1041 of the first limiting portion 104, the second convex-fitted portion 214 can be forced to be inserted into the slot 101 from outside the slot 101 and snapped into the groove of the second limiting portion 105. Through the above configuration, in the process of assembling the circuit board 21 to the stator 10, after one end of the embedded portion 211 of the circuit board 21 is inserted into the slot 101 and the first convex-fitted portion 213 is snapped into the second area 1042 of the groove of the first limiting portion 104, the other end of the embedded portion 211 of the circuit board 21, that is, the end where the second convex-fitted portion 214 is located, is pushed to move towards the slot 101 with the first convex-fitted portion 213 and the outer side wall of the groove of the first limiting portion 104 as the fulcrum, and the end is pushed into the slot 101; after the end where the second convex-fitted portion 214 is located is pushed into the slot 101, the second convex-fitted portion 214 is also snapped into the groove of the second limiting portion 105 automatically. In this way, the circuit board 21 can be inserted into the slot 101 conveniently, and the circuit board 21 is fixed by the first limiting portion 104 and the second limiting portion 105.

[0064] In this embodiment, in order to facilitate the rotation of the first convex-fitted portion 213 with the outer side wall of the groove of the first limiting portion 104 as the fulcrum, the outer side wall of the groove of the first limiting portion 104 can be configured to have a relatively high height, such as Figure 4As shown, in this way, the outer side wall of the groove of the first limiting part 104 can not only limit the outward movement of the first concave-convex matching part 213, but also can be used as a positioning column at this position, which is beneficial to assembly.

[0065] As shown, on the outer side of the outer side wall of the groove of the first limiting part 104, a concave area 1043 can be further arranged, which can avoid collision with the related area on the circuit board 21 when the circuit board 21 rotates around the outer side wall of the groove of the first limiting part 104 as a fulcrum. Figure 4

[0066] In an embodiment of the motor, the top end of the outer side wall of the groove of the first limiting part 104 is a slope 1044 inclined to the opening direction of the slot 101. In this embodiment, the top end of the outer side wall of the groove of the first limiting part 104 is arranged as the slope 1044, and the slope 1044 is inclined to the opening direction of the slot 101, that is, outwardly inclined. In this way, when the first concave-convex matching part 213 is inserted into the slot 101, the corresponding part of the end where the first concave-convex matching part 213 is located is facilitated to be attached to the slope 1044, and it is also beneficial to maintain the stability between the first concave-convex matching part 213 and the first limiting part 104 when the circuit board 21 rotates.

[0067] In an embodiment of the motor, the circuit board 21 is in a whole crescent shape, as shown. Figure 5 The crescent shape can be attached and matched with the ring hole of the stator 10, and most of the area of the circuit board 21 can be inserted into the slot 101, that is, the embedded part 211 of the circuit board 21 can have a larger area ratio, and the area of the part outside the slot 101 can be smaller.

[0068] In summary, the motor provided by the present application has the slot 101 arranged on the stator 10, and the circuit board 21 can be partially inserted into the slot 101. By being inserted into the slot 101, the circuit board 21 can be basically fixed. In this way, during the assembly of the motor, only one insertion action is needed to install and basically fix the circuit board 21 to the stator 10, and the circuit board 21 will not be inclined due to the gravity of the power line 22 and other factors, and the sensor assembly 20 will not fall off the stator 10. Compared with the prior art, in this embodiment, there is no time period during the entire assembly process of the motor, during which the circuit board 21 of the sensor assembly 20 is in an unfixed state. Therefore, the motor in this embodiment is simple to assemble, less prone to errors, has a higher success rate, and is easy to achieve higher assembly efficiency.

[0069] In an embodiment of the circuit board of the present application, as shown, Figure 5 ​As shown, the circuit board 21 includes an insert portion 211 and a power connection portion 212. The insert portion 211 is used to insert into the slot 101 provided on the motor stator 20. The power connection portion 212 is connected to the insert portion 211. The power connection portion 211 is used to connect a power cord.

[0070] In this embodiment, the embedded part 211 of the circuit board 21 is fixed during assembly by being inserted into the slot 101 of the motor stator 20. During the entire assembly process, only one insertion action is required; there is no need to continuously hold the circuit board 21. The circuit board 21 will not tilt due to factors such as the gravity of the power cord 22, nor will it cause the sensor assembly 20 to fall off the stator 10. Compared with the prior art, this embodiment simplifies the assembly operation, reduces the likelihood of errors, increases the success rate, and facilitates higher assembly efficiency.

[0071] In one embodiment of the circuit board, such as Figure 5 As shown, circuit board 21 includes a first side and a second side that are opposite to each other (respectively...). Figure 5 The lower right side and the upper right side of the seat), both the first and second sides are curved in a first direction (the first direction is in the middle). Figure 5 Figure 5 The first side is convex (in a slightly lower left direction), and the second side is concave. In this case, the insert 211 is located on the first side of the circuit board. In this embodiment, the above arrangement makes the circuit board 21 generally crescent-shaped, which can match the surface of the inner peripheral wall S1 of the stator 10.

[0072] In one embodiment of the circuit board, the circuit board 21 is provided with a first concave-convex mating portion 213 and a second concave-convex mating portion 214. The first concave-convex mating portion 213 and the second concave-convex mating portion 214 are respectively used to form a concave-convex mating limiting structure with the first limiting portion 104 and the second limiting portion 105 provided in the slot 101.

[0073] In this embodiment, the circuit board 21 can be further fixed and positioned within the slot 101 by the cooperation of the first concave-convex mating part 213 and the first limiting part 104, and by the cooperation of the second concave-convex mating part 214 and the second limiting part 105, thus making the circuit board more securely fixed. Specifically, the first concave-convex mating part 213 can be semi-circular, and the second concave-convex mating part 214 can be arc-shaped.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0075] The above description is merely a specific embodiment of the present invention, enabling those skilled in the art to understand or implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An electric motor, characterized in that, The motor includes a stator, a rotor, a slot, and a sensor assembly; The motor has an outer stator and inner rotor structure, and the slot is disposed on the inner peripheral wall of the stator; or, the motor has an outer rotor and inner stator structure, and the slot is disposed on the outer peripheral wall of the stator. The sensor assembly includes a circuit board and a power cord. The circuit board is at least partially inserted into and fixed in the slot, and the power cord is connected to the circuit board. Along the axial direction of the rotor, the motor has a first end and a second end; the first end of the motor is provided with an end cover; The inner peripheral wall of the stator where the slot is located is provided with a boss that protrudes in the radial direction of the rotor, or the outer peripheral wall of the stator where the slot is located is provided with a boss that protrudes in the radial direction of the rotor. The boss has a first end face facing the first end of the motor and a second end face facing the second end of the motor; the first end face is used to support the end cover, serving as the support surface of the end cover; On the inner or outer peripheral wall of the stator, the boss is arranged circumferentially and has a notch in the circumferential direction, and the slot is arranged at the notch; When the circuit board is inserted into the slot, the surface of the circuit board facing the first end of the motor is coplanar with the first end face; A limiting structure is provided in the slot, and the limiting structure fixes the circuit board in the slot. The limiting structure includes a first limiting part and a second limiting part, which are respectively disposed at both ends of the slot along the width direction; The first limiting part and the second limiting part each have a groove or a protrusion shape; The portion of the circuit board that is inserted into the slot has a first concave-convex mating portion and a second concave-convex mating portion, wherein the first concave-convex mating portion and the second concave-convex mating portion are respectively used to form a concave-convex mating limiting structure with the first limiting portion and the second limiting portion. The first limiting part has a groove shape, and the groove includes a first area and a second area; The first area is used to accommodate the first concave-convex mating part when the circuit board is inserted and fixed in the slot; the second area is located inside the first area. The first convex-concave mating part can rotate between the first region and the second region with the outer side wall of the groove of the first limiting part as the fulcrum; when the first convex-concave mating part rotates from the second region of the first limiting part to the first region, the second convex-concave mating part can be forcefully inserted into the slot from outside the slot and locked in the second limiting part.

2. The motor according to any one of claims 1, characterized in that, The motor has an inner rotor and outer stator structure; on the end face of the stator, the stator has a notch, which is used to lead the power line out from the inside of the stator.

3. The motor according to claim 2, characterized in that, The slot is located adjacent to the notch; and / or The circuit board includes an insert portion and a power connection portion. The insert portion is used to be inserted into the slot, and the power connection portion is connected to the insert portion and used to connect a power cord. When the circuit board is inserted into the slot, the power connection portion is between the insert portion and the notch.

4. The motor according to claim 1, characterized in that, The first concave-convex mating part is semi-circular, and the second concave-convex mating part is arc-shaped.

5. The motor according to claim 1, characterized in that, The top of the outer side wall of the groove of the first limiting part is an inclined surface that slopes toward the opening direction of the slot.

6. The motor according to claim 1, characterized in that, The circuit board is crescent-shaped.

7. A circuit board, characterized in that, The circuit board includes an embedded part and a power connection part. The embedded part is used to be inserted into a slot provided on the motor stator. The power connection part is connected to the embedded part and is used to connect a power cord. The circuit board is provided with a first concave-convex mating part and a second concave-convex mating part; The first and second convex-concave mating portions are respectively used to form a convex-concave mating limiting structure with the first and second limiting portions provided in the slot; The first limiting part has a groove shape, and the groove includes a first area and a second area; The first area is used to accommodate the first concave-convex mating part when the circuit board is inserted and fixed in the slot; the second area is located inside the first area. The first convex-concave mating part can rotate between the first region and the second region with the outer side wall of the groove of the first limiting part as the fulcrum; when the first convex-concave mating part rotates from the second region of the first limiting part to the first region, the second convex-concave mating part can be forcefully inserted into the slot from outside the slot and locked in the second limiting part.

8. The circuit board according to claim 7, characterized in that, The circuit board includes a first side and a second side facing away from each other. Both the first side and the second side are curved in a first direction, so that the first side is convex and the second side is concave. The embedded part is located on the first side of the circuit board.

9. The circuit board according to claim 7, characterized in that, The first concave-convex mating part is semi-circular, and the second concave-convex mating part is arc-shaped.

Images