CN218850473U - Motor stator subassembly, driving motor and vehicle - Google Patents

Abstract

The utility model provides a motor stator subassembly, driving motor and vehicle, motor stator subassembly include the core, and the core includes tooth portion, and tooth portion has seted up the coolant liquid way in inside, and the coolant liquid way link up the tip of core, and motor stator subassembly is still including the concatenation body, wherein: the splice body sets firmly in the core tip, and the splice body has seted up the transfer liquid way in inside, and transfer liquid way intercommunication motor coolant liquid inlet to extend in order to communicate the coolant liquid way to the tip of core.

Description

Motor stator assembly, drive motor and vehicle

technical field

The utility model relates to the technical field of motor cooling, in particular to a motor stator assembly, a driving motor and a vehicle.

Background technique

The driving motor is a driving device that is widely used in various fields. The requirements for the working stability, performance and product reliability of the driving motor are becoming increasingly stringent. Among them, the heat dissipation capability of the driving motor is particularly important. Heat dissipation of the stator assembly.

Existing drive motors generally adopt oil-cooled heat dissipation. The drive motor is equipped with a heat dissipation liquid path passing through the stator assembly. After the oil is injected into the motor casing, it flows along the heat dissipation liquid path, and the convective heat exchange between the oil liquid and the stator assembly to reduce the temperature of the stator assembly.

However, the problem is that the arrangement of the heat dissipation fluid circuit will lead to a complex structure of the stator assembly and even the drive motor, an increase in the number of parts required, and an increase in the assembly coordination requirements between the parts, which will lead to a significant increase in the manufacturing cost of the drive motor. This is obviously not conducive to the popularization and use of drive motors.

Utility model content

In view of this, the utility model provides a motor stator assembly with a heat dissipation liquid circuit and a simpler structure. By simplifying the structure of the motor stator assembly and the heat dissipation liquid circuit, the manufacturing cost of the driving motor using the motor stator assembly is reduced.

The motor stator assembly provided by the utility model includes a core body, the core body includes a tooth part, and the tooth part is provided with a cooling liquid path inside, and the cooling liquid path runs through the end of the core body. The motor stator assembly also includes a splicing body, wherein: the splicing body It is fixed at the end of the core body, and there is a transfer liquid path inside the splicing body, the transfer liquid path communicates with the motor coolant injection port, and extends to the end of the core body to communicate with the cooling liquid path.

In one of the embodiments, the splicing body includes a conduction unit and a liquid separation unit, the conduction unit has a hollow cavity connected to the motor coolant inlet, a liquid separation flow channel is opened inside the liquid separation unit, and one end of the liquid separation flow channel It communicates with the hollow inner cavity and forms a transfer liquid path with the hollow inner cavity, and the other end communicates with the cooling liquid path.

In this way, the splicing body is further divided into two independently formed conduction units and liquid separation units, so that the hollow inner cavity and the liquid separation flow channel can be independently processed, and the difficulty of processing the transfer liquid path is further reduced. Shorten the processing time and cost of the splicing body and the transfer fluid circuit.

In one of the embodiments, the core body further includes a cylinder for forming a yoke, the teeth protrude from the inner wall of the cylinder, and the liquid separation unit includes:

A liquid separator ring plate is covered on the end surface of the cylinder and connected to the conduction unit; and,

The tooth plate is protrudingly set on the inner edge of the liquid separator ring plate, and is covered on the end surface of the tooth portion;

The liquid distribution channel extends radially along the liquid distribution ring plate, one end of which passes through the liquid distribution ring plate and communicates with the hollow inner cavity, and the other end passes through the tooth plate and communicates with the cooling liquid path.

In this way, the heat dissipation liquid path realizes the transition from the end of the core body to the tooth portion of the core body through the liquid separation flow channel, and the heat dissipation liquid path of this part of the transition is assembled and fixedly connected by the conduction unit, the tooth plate and the tooth portion Forming, forming difficulty and cost are all reduced. The heat dissipation medium entering the hollow cavity of the conduction unit first gathers outside the end of the cylinder, and then flows radially along the core to diffuse into each tooth of the core.

In one of the embodiments, the width of the liquid separation flow channel decreases along the direction close to the core axis; and/or, in a plane perpendicular to the core axis, the width of the projected shape of the cooling liquid path is There is a decreasing trend in the direction of the body axis.

Such an arrangement can reduce the influence of the liquid separation channel or the cooling liquid channel on the electromagnetic performance of the drive motor.

In one of the embodiments, the liquid separation unit includes a first cover plate and a second cover plate stacked along the axial direction of the core body, the first cover plate is attached to the end surface of the core body, and has a liquid separation channel, and the second cover plate The second cladding plate is provided with a liquid distribution port, which is fixedly connected with the conduction unit. The liquid distribution port communicates with the hollow inner cavity, and communicates with the end of the liquid distribution flow channel relatively away from the axis of the core body.

In this way, the structure of the liquid separation ring plate is simpler. The first cover plate and the second cover plate are combined and fixed after separate forming to form a liquid separation flow channel and a liquid separation port, and there is no need to process the entire continuous liquid separation flow channel. and the liquid distribution port, thus reducing the forming difficulty and processing cost of the liquid distribution channel and the liquid distribution port.

In one of the embodiments, the conduction unit is arranged opposite to the end surface of the core yoke, at least a part of the liquid separation unit is attached to the end surface of the tooth, and forms a step with the conduction unit; the motor stator assembly also includes a winding, a winding The winding is arranged on the outer side of the tooth part and the part where the liquid distributing unit is attached to the tooth part, and the steps are used to avoid the liquid distributing unit being sleeved by the winding.

In this way, the setting of the steps can avoid the excessive increase of the axial dimension of the motor stator assembly due to the arrangement of the splicing body, which is beneficial to realize the compact structure and light weight of the motor stator assembly and the driving motor.

In one of the embodiments, the conduction unit and the liquid separation unit are separately formed and fixedly connected, and the splicing body also includes a leak-proof seal; between the conduction unit and the liquid separation unit, and between the conduction unit and the motor housing The space is sealed and connected by a leak-proof seal to seal the hollow cavity.

In this way, the conduction unit serves as a structure that collects the heat dissipation medium at the end of the core body. After the anti-leakage seal is installed, it can control the heat dissipation medium that has just reached the end of the core body and has not yet entered the cooling liquid circuit to maintain a certain pressure to prevent Due to the lack of sealing or poor sealing of the hollow inner cavity, part of the heat dissipation medium leaks out of it in advance and fails to enter the cooling liquid circuit, which in turn results in a decrease in the amount of heat dissipation medium actually participating in cooling and heat exchange, a decrease in cooling effect, and a loss of flow kinetic energy.

In one of the embodiments, the cooling liquid path includes a first cooling liquid path and a second cooling liquid path, any cooling liquid path passes through the core body, and a first opening and a second opening are respectively formed at both ends of the core body. It includes a first splicing body and a second splicing body respectively fixed at both ends of the core body, wherein: in the first cooling liquid path, its first opening communicates with the transfer liquid path of the first splicing body, and its second opening is exposed; In the cooling liquid path, its first opening is exposed, and its second opening communicates with the transfer liquid path of the second splicing body.

In this way, heat dissipation medium can be discharged from both ends of the core body, thereby cooling the winding parts protruding from both ends of the core body, and the heat dissipation medium entering the first cooling liquid path flows out from the second opening at one end of the core body and enters the second The heat dissipation medium of the second cooling liquid path flows out from the first opening at the other end of the core body.

In one of the embodiments, the first cooling liquid passage and the second cooling liquid passage are arranged alternately one by one along the circumferential direction of the core body; or, along the circumferential direction of the core body, the first cooling liquid passage and the second cooling liquid passage respectively Set alternately in units of groups.

In this way, in the circumferential direction of the core, no matter whether the heat dissipation medium is discharged from the end of the core body where the first opening is located, or from the end of the core body where the second opening is located, the discharged heat dissipation medium is more uniform, so that it can be more uniform The ground cools the end of the winding to avoid overheating due to insufficient local cooling at the end of the winding.

In one of the embodiments, the first splicing body has a plurality of first liquid storage chambers arranged at intervals along the circumferential direction of the core and communicating with each other, and the second splicing body has a plurality of first liquid storage chambers arranged at intervals along the circumferential direction of the core and communicating with each other. The first liquid storage bin communicates with the first opening of the first cooling liquid path, and the second liquid storage bin communicates with the second opening of the second cooling liquid path.

In this way, the heat dissipation medium entering the first splicing body can be divided into multiple branches. First, it enters multiple first liquid storage bins for short-term storage, and the heat dissipation medium entering the second splicing body can also be divided into multiple branches. First, Enter multiple second liquid storage bins for short-term storage. As the pressure in the first liquid storage bins and the second liquid storage bins gradually increases, the heat dissipation medium in the first liquid storage bins enters the respective corresponding second liquid storage bins. In the first cooling liquid path, the heat dissipation medium in the second liquid storage tank respectively enters into the corresponding second cooling liquid path, thereby realizing the transfer of the heat dissipation medium to the first cooling liquid path and the second cooling liquid along the circumferential direction of the core body. The distribution in the road, so that all the teeth on the core can be cooled.

In one embodiment, in the circumferential direction of the core body, the first liquid storage bin and the second liquid storage bin are misplaced one by one; or, in the circumferential direction of the core body, the first liquid storage bin and the second liquid storage bin are respectively Mutual misalignment in groups; or, at least one of the first splicing body and the second splicing body is formed separately from the core body.

Such an arrangement allows both the first cooling liquid path and the second cooling liquid path to be arranged as channels extending along a straight line, thereby further reducing the difficulty of forming the cooling liquid path and the structural complexity, even if all the cooling liquid paths are along the axis of the core body Extending in the direction, as long as the first liquid storage tank and the second liquid storage tank are misaligned, it can be ensured that only one end of each cooling liquid path is connected to one liquid storage tank, and there will be no two liquid storage tanks at both ends of the core. The case where both ends of a coolant path are connected at the same time.

The utility model also provides a driving motor. The driving motor includes a motor casing, a motor rotor assembly and the above-mentioned motor stator assembly. The motor casing is fixedly connected to the motor stator assembly, and the motor rotor assembly is arranged inside the core.

In one of the embodiments, a limiting step is provided in the motor housing, and the limiting step abuts against the splicing body to limit the movement of the motor stator assembly relative to the motor housing along the axial direction of the core; and/or,

The transfer fluid path penetrates the splicing body to form a transfer inlet, and the transfer inlet faces the inner peripheral surface of the motor housing, and there is an overflow liquid path connecting the transfer inlet between the motor housing and the motor stator assembly, and the motor housing is provided with The motor coolant inlet connected to the overflow circuit.

In this way, the motor stator assembly can be axially positioned by the limit step in the motor housing, making its installation and fixing in the motor housing more stable and reliable; The peripheral cooling of the components is also convenient to communicate with the transfer liquid circuit, thereby shortening the stroke of the heat dissipation medium from the motor coolant inlet to the transfer liquid circuit, and simplifying the communication between the two without the need for a connection between the splicing body and the overflow liquid circuit To add other structures, it is only necessary to correctly assemble the motor stator assembly into the motor housing to realize the communication between the transfer fluid circuit and the overflow fluid circuit.

The utility model also provides a vehicle, which includes the above driving motor.

Compared with the prior art, the utility model has at least the following beneficial effects:

1) The cooling liquid path is opened in the tooth part of the core body, so that the heat dissipation medium can flow through the tooth part of the core body, thereby dissipating heat from the part of the motor stator assembly where the heat is seriously concentrated. The heat dissipation scheme of the outer periphery of the core, the drive motor using the motor stator assembly of the utility model has a stronger heat dissipation capability, and the cooling effect of the motor stator assembly is more significant after the heat dissipation medium is introduced.

Description of drawings

Fig. 1 is the schematic diagram after the driving motor of one embodiment of the present invention is cut along the axial direction of the core body;

Fig. 2 is a partial structural schematic diagram of a drive motor according to an embodiment of the present invention;

Fig. 3 is a partial structural schematic diagram of a motor stator assembly according to an embodiment of the present invention;

Fig. 4 is a schematic diagram of the end face structure of the second cover plate according to an embodiment of the present invention;

Fig. 5 is a schematic diagram of the end face structure of the first cladding plate according to an embodiment of the present invention;

Fig. 6 is a schematic diagram of the end face structure of the core body of an embodiment of the present invention;

Fig. 7 is a partial structural schematic diagram of a motor housing according to an embodiment of the present invention;

Fig. 8 is a partial structural schematic diagram of a motor housing according to another embodiment of the present invention;

Fig. 9 is a partial structural schematic diagram of a motor stator assembly according to an embodiment of the present invention;

Fig. 10 is a schematic structural diagram of a conduction unit according to an embodiment of the present invention;

Fig. 11 is a partial structural schematic diagram of a conduction unit in another embodiment of the present invention.

10. Core; 11. Cylinder; 12. Teeth; 121. Coolant path; 1211. First opening; 1212. Second opening; 20. Splicing body; 201. First splicing body; 202. Second splicing body; 203, transfer fluid circuit; 21, conduction unit; 2101, first conduction unit; 2102, second conduction unit; 211, hollow cavity; 2111, transfer entrance; 2113, liquid storage bin; Liquid hole; 22, liquid separation unit; 221, liquid separation ring plate; 2211, first covering plate; 2212, second covering plate; 2213, liquid separation port; 222, tooth plate; 223, liquid separation flow channel; 23, Anti-leakage seal; 30, winding; 40, motor casing; 41, motor coolant injection port; 42, overflow liquid path; 421, circumferential liquid path; 422, axial liquid path; 43, limit step department.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Way. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of this invention. The terminology used herein in the description of the utility model is only for the purpose of describing specific implementations, and is not intended to limit the utility model. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

The utility model provides a motor stator assembly, and also provides a driving motor with the motor stator assembly. The motor stator assembly can be used in various driving motors, such as oil-cooled motors used in new energy vehicles. This kind of driving motor uses oil as a heat dissipation medium, and a heat dissipation liquid circuit is arranged inside, and the oil is injected into the oil-cooled motor and then dissipated along the heat Fluid flow. The motor stator assembly of the driving motor of a new energy vehicle will be used as an example to illustrate the structure and principle of the present utility model.

Referring to Fig. 1-Fig. 2, the driving motor provided by the utility model also includes a motor rotor assembly (not shown) and a motor housing 40 for accommodating the motor stator assembly. The motor housing 40 has a cylindrical structure, and the motor stator assembly is fixedly installed in the motor housing 40, including a core 10 and a winding 30. The core 10 includes a hollow cylinder 11 and teeth fixedly connected to the cylinder 11. Part 12, the motor rotor assembly is arranged in the hollow channel of the cylinder body 11, and the core body 10, the motor rotor assembly and the motor housing 40 are coaxially arranged. The barrel 11 forms a yoke of the core 10 , and the teeth 12 protrude from the inner wall of the hollow channel of the barrel 11 . The number of teeth 12 is multiple, and the plurality of teeth 12 are arranged at intervals along the circumference of the cylinder 11. The number of windings 30 is also multiple, and is equal to the number of teeth 12. Each winding 30 is correspondingly wound on Outside one tooth portion 12 , a plurality of windings 30 are arranged along the circumferential direction of the core body 10 .

The stator assembly of the motor has a heat dissipation liquid path, and the motor casing 40 is also provided with a motor coolant injection port 41 communicating with the heat dissipation liquid path. The cooling liquid path includes a cooling liquid path 121, which is set inside the tooth part 12, and the cooling liquid path 121 connects both ends of the core body 10, specifically, the two ends of the tooth part 12 along the axial direction of the core body 10. The cooling liquid passage 121 forms a first opening 1211 and a second opening 1212 at both ends of the core body 10 , respectively. It should be emphasized that in the present invention, the cooling fluid passage 121 is entirely formed inside the tooth portion 12 , rather than being surrounded by the tooth portion 12 and other devices or structures in the driving motor. Therefore, when the cooling medium flows into the cooling liquid passage 121 , the tooth portion 12 can be directly cooled, and at the same time, a part of the heat of the winding 30 wound outside the tooth portion 12 can be carried.

Since the winding 30 surrounds the tooth portion 12, not only the winding 30 passes through the gap between the tooth portion 12 and the tooth portion 12, but also the winding 30 passes through the end of each tooth portion 12, and the winding 30 will block the tooth portion 12 after the winding is completed. end, which increases the difficulty of the layout of the heat dissipation liquid. For this reason, the motor stator assembly provided by the utility model also includes a splicing body 20 fixedly connected to the core body 10 . There is a transfer liquid path 203 inside the splicing body 20, and the transfer liquid path 203 penetrates the side of the splicing body 20 relatively close to the end of the core body 10 so as to directly communicate with the cooling liquid path 121. 41 connected. In other words, in addition to the cooling liquid path 121 , the cooling liquid path also includes a transfer liquid path 203 opened in the splicing body 20 .

In some embodiments, the splicing body 20 includes a spliced and fixed conduction unit 21 and a liquid separation unit 22. The conduction unit 21 is approximately a closed ring structure, which extends along the circumferential direction of the core body 10, and the conduction unit 21 is arranged coaxially with the cylinder body 11, and is opposite to the end of the cylinder body 11. The conduction unit 21 There is a hollow inner cavity 211 connected in a closed loop along the circumference of the cylinder 11 inside; the liquid separation unit 22 is fixedly connected to the end of the core body 10, and a plurality of liquid separation channels 223 are opened inside, and one end of each liquid separation flow channel 223 It communicates with the hollow inner cavity 211, thereby jointly forming a transfer liquid path 203 with the hollow inner cavity 211, and the other end passes through the side of the liquid separation unit 22 close to the core body 10 to communicate with the cooling liquid path 121. The conduction unit 21 can be formed separately from the liquid dispensing unit 22 . Referring to FIGS. 2-6 , the liquid dispensing unit 22 is directly attached to the end of the core body 10 , and the conduction unit 21 is fixed on the side of the liquid dispensing unit 22 away from the end of the core body 10 . The number of liquid distribution channels 223 is equal to the number of teeth 12 , and each liquid distribution channel 223 communicates with one cooling liquid channel 121 correspondingly.

See Figures 2-6. Specifically, the liquid separation unit 22 includes a liquid separation ring plate 221 and a plurality of tooth plates 222 . Viewing the liquid separation ring plate 221 along the axial direction of the core body 10, the shape of the liquid separation ring plate 221 is basically the same as that of the end surface of the cylinder body 11, and is also an annular structure with a through hole, which communicates with the through hole of the core body 10. The liquid separating ring plate 221 is arranged coaxially with the cylinder body 11, and is set on the end surface of the cylinder body 11; the tooth plate 222 is protruded on the inner edge of the liquid separating ring plate 221, that is, protrudingly disposed on the through hole of the liquid separating ring plate 221 On the inner wall, a plurality of tooth plates 222 are arranged at intervals along the circumferential direction of the liquid separation ring plate 221/cylinder body 11, the number of which is the same as the number of teeth 12 of the core body 10, and the plurality of tooth plates 222 are respectively covered one by one. The ends of the plurality of teeth 12 . The transfer liquid path 203 passes through the side of the tooth plate 222 relatively close to the tooth portion 12 of the core body 10 . In the state where the tooth plate 222 and the end of the tooth portion 12 are attached and fixed, the winding 30 is not only wound outside the tooth portion 12, but also wound on the side of the tooth plate 222 away from the tooth portion 12.

Optionally, the liquid separation flow channel 223 extends radially along the cylinder body 11, one end of which extends to the liquid separation ring plate 221 and passes through the side of the liquid separation unit 22 close to the conduction unit 21, thereby forming a communicating hollow cavity 211 The liquid distribution ports 2213 are arranged at intervals along the circumferential direction of the core body 10 . The other end of the liquid distributing channel 223 extends to the tooth plate 222 and passes through the side of the liquid distributing unit 22 close to the end of the core 10 to communicate with the cooling liquid passage 121 . Looking at the motor stator assembly along the axial direction of the core body 10, the shape of the tooth plate 222 is consistent with the shape of the end of the tooth part 12, the shape of the liquid separation flow channel 223 is consistent with the shape of the cooling liquid path 121, and the In the plane of the 10 axis, the projected shape of the cooling liquid channel 121 is consistent with and coincides with the shape of the liquid separation channel 223 .

The teeth 12 include a root connected to the yoke and a top relatively away from the yoke. In the circumferential direction of the core 10, the width of the root of each tooth 12 is greater than the width of the top of the tooth 12, so that two adjacent teeth can be ensured. There is a gap of sufficient distance between the teeth 12 to allow winding access of the winding 30 . In a plane perpendicular to the axis of the core body 10, the width of the projected shape of the cooling liquid path 121 tends to decrease along the direction close to the axis of the core body 10, so as to better adapt to the tooth portion 12 along the direction close to the axis of the core body 10. The width of the body 10 in the radial direction is changed to avoid a large impact on the electromagnetic performance of the drive motor due to the opening of the cooling liquid passage 121 .

Similarly, toothed plate 222 comprises the root that connects liquid-separating ring plate 221 and the top that is relatively away from liquid-separating ring plate 221, and in the circumferential direction of liquid-separating ring plate 221/core body 10, the root width of each toothed plate 222 is greater than this. The width of the top of the tooth portion 12 can ensure that there is a sufficient distance between two adjacent tooth plates 222 to allow the winding 30 to enter. The width of the liquid separation channel 223 tends to decrease along the direction close to the liquid separation ring plate 221 axis/core body 10 axis. Of course, the shape of the liquid separation channel 223 does not have to be the same as the shape of the first opening 1211 or the second opening 1212 formed on the end of the core body 10 by the cooling liquid path 121 . Inside, the projected shape of the liquid separation channel 223 can also be larger than the first opening 1211 or the second opening 1212, as long as it can ensure that the oil can flow into the cooling liquid channel 121 smoothly.

Further, referring to FIG. 3 , FIG. 4 , FIG. 5 , and FIG. 6 , the liquid separation unit 22 includes a first cover plate 2211 and a second cover plate 2212 which are stacked and assembled along the axial direction of the core body 10 . Viewing the first cladding plate 2211 and the second cladding plate 2212 along the axial direction of the core body 10 , the outer shape of the two is the same as that of the end surface of the core body 10 . Regardless of the first cover plate 2211 or the second cover plate 2212, they all include a liquid separation ring plate 221 and a tooth plate 222 protruding from the inner edge of the liquid separation ring plate 221. Wherein the first cladding plate 2211 is directly attached to the end of the core body 10, and is provided with a plurality of liquid separation channels 223, and the second cladding plate 2212 is located on the side of the first cladding plate 2211 relatively away from the core body 10, and is provided with There are a plurality of liquid outlets 2213. When the first cover plate 2211 and the second cover plate 2212 are fixedly connected, the projected outer contours of the two on the radial plane of the core body 10 completely coincide, and at this time the liquid distribution port 2213 and the liquid distribution channel 223 are relatively far away from the axis of the core body 10 One end of the separation channel 223 is connected, and the rest of the liquid separation channel 223 is covered by the second cover plate 2212 . The conduction unit 21 is fixed on the side of the second cover plate 2212 relatively away from the first cover plate 2211 , and finally covers the liquid separation ring plate 221 .

The first cover plate 2211 and the second cover plate 2212 may be stacked in the axial direction and fixedly connected by means of welding or bonding. It can be understood that in other embodiments, the liquid separation unit 22 can also be an inseparable independent element, that is, the liquid separation unit 22 does not have to be coaxially arranged by the first cover plate 2211 and the second cover plate 2212 formed separately. After the connection is fixed.

As mentioned above, the conduction unit 21 is arranged opposite to the end face of the yoke of the core body 10, and the tooth plate 222 of the liquid separation unit 22, that is, the tooth plate 222 of the first cover plate 2211 and the tooth plate 222 of the second cover plate 2212 are on the core. The body 10 protrudes radially relative to the conduction unit 21, and forms a step with the conduction unit 21. The winding 30 is wound around the tooth plate 222 of the liquid separation unit 22 and attached to the tooth plate 222 of the second cover plate 2212 . Therefore, the step formed between the tooth plate 222 of the liquid separation unit 22 and the conduction unit 21 can avoid the winding 30 passing by, shortening the dimension of the winding 30 along the axial direction of the core body 10.

Further, the splicing body 20 also includes an anti-leakage seal 23, and the anti-leakage seal 23 is used to seal the opening of the hollow inner cavity 211 of the transmission unit 21, so as to ensure that the oil entering the interior of the transmission unit 21 can maintain a certain pressure, The pressure can increase the flow velocity of the oil entering the liquid separation port 2213, the liquid separation flow channel 223 and the cooling liquid path 121, thereby improving the heat dissipation effect of the oil liquid in the motor stator assembly by convective heat exchange. Specifically, the anti-leakage seal 23 includes a first sealing ring that is sealingly connected between the conduction unit 21 and the liquid dispensing unit 22, and also includes a second sealing ring that is sealingly connected between the conduction unit 21 and the inner wall of the motor housing 40. sealing ring. Referring to Fig. 2 and Fig. 7, the heat dissipation liquid path also includes an overflow liquid path 42 located between the outer peripheral wall of the core body 10 and the inner peripheral wall of the motor housing 40, the overflow liquid path 42 directly communicates with the motor coolant injection port 41, in addition The hollow inner cavity 211 penetrates the outer peripheral wall of the conduction unit 21 to form a transfer inlet 2111 communicating with the overflow liquid path 42, and the second sealing ring is arranged around the outer peripheral wall of the conduction unit 21, and the guided unit 21 and the motor housing Body 40 is pressed together.

The transfer inlet 2111 can be towards the inner peripheral surface of the motor housing 40, or towards the inner end surface of the motor housing 40. When the motor coolant injection port 41 was opened on the peripheral wall of the motor housing 40, the transfer inlet 2111 was preferably opened on the outer periphery of the conduction unit 21, and towards the inner peripheral surface of the motor housing 40, when the motor coolant injection port 41 was opened on the At the end of the motor housing 40 , the transfer inlet 2111 may be opened on the side of the conduction unit 21 away from the liquid separation unit 22 and facing the inner end surface of the motor housing 40 .

In some embodiments, the splicing body 20 includes a first splicing body 201 and a second splicing body 202 respectively fixed at both ends of the core body 10, and the cooling liquid path 121 includes a first cooling liquid path and a second cooling liquid path. The liquid passages 121 pass through both ends of the core body 10, specifically, through the two ends of the tooth portion 12 to form a first opening 1211 and a second opening 1212 respectively. , the openings of the cooling liquid passages 121 located at the other end of the core body 10 are all second openings 1212 . It should be noted that the reason why the first cooling liquid path and the second cooling liquid path are differentiated here is that the flow directions of the oil in the first cooling liquid path and the second cooling liquid path are different.

In some embodiments, at least one of the first splicing body 201 and the second splicing body 202 is formed separately from the core body 10 .

The overflow liquid path 42 includes an axial liquid path 422 extending axially along the core body 10. The first splicing body 201 and the second splicing body 202 have their own transfer inlets 2111 to communicate with the axial liquid path 422. The first cooling liquid The first opening 1211 of the passage communicates with the transfer liquid passage 203 of the first splicing body 201, while its second opening 1212 is exposed, and the oil can be discharged from the second opening 1212, and flow to the inside of the motor housing 40 and protrude from the second opening 1212. The two openings 1212 are both located at the winding 30 at the same end of the core body 10; the second opening 1212 of the second cooling fluid path communicates with the transfer liquid path 203 of the second splicing body 202, and its first opening 1211 is exposed, and the oil can flow from its first The discharge from the opening 1211 flows toward the inside of the motor housing 40 and protrudes beyond the winding 30 located at the same end of the core 10 as the first opening 1211 . Therefore, the oil flowing out of the axial liquid passage 422 will be divided into two parts, which respectively flow into the transfer liquid passage 203 of the first splicing body 201 and the transfer liquid passage 203 of the second splicing body 202, and then flow from the first opening 1211 and the second splicing body respectively. The two openings 1212 flow in, and then the two parts of the oil flow in opposite directions in the tooth portion 12 , and finally flow out from the second opening 1212 and the first opening 1211 respectively.

Optionally, the first cooling liquid path and the second cooling liquid path are alternately arranged one by one along the circumferential direction of the core body 10. Of course, the first cooling liquid path and the second cooling liquid path can also be grouped as a unit and arranged along the core body 10. The circumferential direction of the body 10 is arranged alternately. For example, if the first cooling liquid path is represented by the letter A, and the second cooling liquid path is represented by the letter B, after the cooling liquid path 121 is alternately arranged along the circumferential direction of the core body 10, its arrangement The order can be A-A-B-B-A-A-B-B. It can be understood that the number of each group of first cooling liquid circuits and each group of cooling liquid circuits 121 can be the same or different, and the number of each group of cooling liquid circuits 121 is not limited to three, but can also be two or more.

In order to adapt to the arrangement of the first cooling liquid path and the second cooling liquid path, the number and spacing of the liquid separation flow channels 223 of the first splicing body 201 arranged along the circumferential direction of the core body 10 are consistent with the first opening 1211 along the core body. The number and spacing arranged in the circumferential direction of the body 10 are the same, and the number and spacing of the liquid separation channels 223 arranged in the circumferential direction of the core body 10 of the second spliced body 202 are the same as those of the second openings 1212 arranged in the circumferential direction of the core body 10. Same amount and spacing.

Optionally, the conduction unit 21 of the first splicing body 201 has a plurality of first liquid storage chambers 2113 arranged at intervals along the circumferential direction of the core body 10 and communicated with each other, and these first liquid storage chambers 2113 together constitute the conduction The hollow inner cavity 211 of the unit 21, the multiple first liquid storage bins 2113 communicate with the multiple liquid separation flow channels 223 that communicate with the first cooling liquid circuit, so as to communicate with the multiple first openings 1211 in one-to-one correspondence; the second splicing body The conduction unit 21 of 202 has a plurality of second liquid storage chambers 2113 arranged at intervals along the circumferential direction of the core body 10 and communicated with each other, and these second liquid storage chambers 2113 together constitute the hollow inner chamber 211 of the conduction unit 21 The plurality of second liquid storage chambers 2113 communicate with the plurality of liquid-distributing flow channels 223 communicating with the second cooling liquid circuit, thereby communicating with the plurality of second openings 1212 in one-to-one correspondence.

In order to better adapt to the axial extension of the tooth portion 12 along the core body 10, the cooling liquid path 121 also extends linearly along the axial direction of the core body 10. When alternately arranged, the first liquid storage bin 2113 and the second liquid storage bin 2113 are misplaced one by one in the circumferential direction of the core body 10. At this time, on a plane perpendicular to the axial direction of the core body 10, the first liquid storage bin 2113 The projections and the projections of the second liquid storage bin 2113 are alternately arranged one by one along the circumferential direction of the core body 10, and when the first cooling liquid path and the second cooling liquid path are respectively arranged alternately in groups along the circumferential direction of the core body 10, The first liquid storage bin 2113 and the second liquid storage bin 2113 are also misaligned in groups in the circumferential direction of the core body 10. At this time, on the plane perpendicular to the axial direction of the core body 10, the first liquid storage bin 2113 The projections and the projections of the second liquid storage bin 2113 are arranged in groups alternately along the circumferential direction of the core body 10 .

Referring to FIG. 10 , in some embodiments, the liquid storage bins 2113 in the conduction unit 21 are spaced apart from each other, for example, there is a gap between the two first liquid storage bins 2113 communicating with the two first cooling liquid circuits, and the gap can be avoided. The first opening 1211 of the second cooling liquid path and the liquid separation channel 223 communicating with the second cooling liquid path; there is also a gap between the two second liquid storage bins 2113 connecting the two second cooling liquid paths, and the gap can Avoid the second opening 1212 of the first cooling liquid path and the liquid separation channel 223 communicating with the first cooling liquid path.

Referring to Fig. 11, in other embodiments, the conduction unit 21 not only includes liquid storage bins 2113 spaced apart from each other, but also includes liquid spray bins that are also spaced apart from each other, and the liquid storage bins 2113 and liquid spray bins are arranged along the periphery of the core body 10. Alternately set one by one, or set alternately in groups. Simultaneously, the liquid spray chamber connects the conduction unit 21 to form a liquid spray hole 2114, and the aperture or orifice size of the liquid spray hole 2114 is smaller than the first opening 1211 or the second opening 1212. For example, in the conduction unit 21 of the first splicing body 201, a plurality of liquid injection chambers communicate with the first openings 1211 of a plurality of second cooling liquid circuits; The second openings 1212 communicate with the plurality of first cooling liquid passages. When the oil in the cooling liquid passage 121 flows out of the first opening 1211 or the second opening 1212, it will first gather in the liquid spray chamber, the pressure in the liquid spray chamber will gradually increase, and finally the oil can flow from the liquid in the form of a high-speed jet. The liquid spray hole 2114 sprays out, so as to produce a certain degree of atomization effect, and the oil liquid can further diffuse in the motor casing 40 and can cover more windings 30 .

Referring to Fig. 7, the overflow liquid path 42 not only includes the axial liquid path 422, but also includes the circumferential liquid path 421 extending along the circumferential direction of the core body 10, the circumferential liquid path 421 communicates with the axial liquid path 422, and directly communicates with the motor cooling There are multiple liquid inlets 41 and axial liquid passages 422 arranged at intervals along the circumference of the motor housing 40 . In the embodiment shown in Figure 7, the inner peripheral wall of the motor housing 40 is provided with an annular groove. A circumferential liquid path 421 is formed therebetween.

Referring to Figures 8-9, in another embodiment, the inner peripheral wall of the motor housing 40 is provided with a circumferential liquid path 421 extending circumferentially along the core 10, and the outer peripheral wall of the core 10 is provided with a plurality of axial recesses. Grooves, a plurality of axial grooves are arranged at intervals along the circumference of the core body 10 . After the motor stator assembly is fixedly installed in the motor housing 40 , a circumferential fluid path 421 is formed between the inner peripheral wall of the motor housing 40 and the bottom wall of the axial groove.

In order to realize the axial positioning of the motor stator assembly in the motor housing 40, the inner peripheral wall of the motor housing 40 is also provided with a limit step portion 43, and the limit step portion 43 abuts on the splicing body 20 to limit the motor stator assembly along the core body. 10 degrees of freedom to move axially relative to the motor housing 40 . Specifically, the limit step portion 43 may abut against the end surface of the conduction unit 21 on a side away from the core body 10 and the liquid separation unit 22 .

The utility model also provides a vehicle, which uses the driving motor provided by the utility model.

Compared with the prior art, the utility model has at least the following beneficial effects:

1) The cooling liquid circuit and the transfer liquid circuit are formed independently. By assembling and connecting the core body and the splicing body, the two are connected to form a heat dissipation liquid circuit. Compared with directly processing a whole section of inseparable heat dissipation liquid circuit in the core body, this The utility model consumes less time and less processing difficulty in the production and processing stage of parts, and the efficiency and pass rate of separately processing the cooling liquid circuit and the transfer liquid circuit are higher, thus improving the overall manufacturing efficiency and pass rate of the motor stator assembly;

2) The cooling liquid path and the transfer liquid path are processed separately. The shape and dimension accuracy of the two are easier to control, so the shape and dimension accuracy of the heat dissipation liquid path formed after the two are connected is also higher, which is conducive to ensuring that the heat dissipation medium is in the heat dissipation liquid path. Normal flow reduces the kinetic energy loss of the heat dissipation medium in the heat dissipation liquid path, thereby ensuring the heat dissipation capacity of the drive motor using the motor stator assembly;

3) The cooling liquid path is opened in the teeth of the core body, so that the heat dissipation medium can flow through the teeth of the core body, thereby dissipating heat from the part of the motor stator assembly where the heat is seriously concentrated. Compared with the stator iron in the existing drive motor The heat dissipation scheme of the outer periphery of the core, the drive motor using the motor stator assembly of the utility model has a stronger heat dissipation capability, and the cooling effect of the motor stator assembly is more significant after the heat dissipation medium is introduced.

The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, should be considered as within the scope of this specification.

Those of ordinary skill in the art should recognize that the above embodiments are only used to illustrate the utility model, rather than as a limitation to the utility model, as long as within the spirit of the utility model, the above implementation methods Appropriate changes and changes all fall within the scope of protection of the utility model.

Claims (14)

1. A motor stator assembly, comprising a core (10), the core (10) comprising a tooth portion (12), characterized in that the tooth portion (12) is provided with a cooling liquid path (121) inside , the cooling liquid path (121) runs through the end of the core (10), and the motor stator assembly also includes a splicing body (20), wherein: The splicing body (20) is fixed at the end of the core body (10), and the splicing body (20) is provided with a transfer liquid circuit (203) inside, and the transfer liquid circuit (203) is connected to the motor for cooling The liquid injection port (41) extends toward the end of the core (10) to communicate with the cooling liquid path (121). 2. The motor stator assembly according to claim 1, wherein the splicing body (20) comprises a conduction unit (21) and a liquid separation unit (22), and the conduction unit (21) has a communication motor The hollow cavity (211) of the coolant injection port (41), the liquid separation unit (22) is provided with a liquid separation flow channel (223), and one end of the liquid separation flow channel (223) is connected to the hollow interior cavity (211), and forms the transfer liquid path (203) with the hollow inner cavity (211), and the other end communicates with the cooling liquid path (121). 3. The motor stator assembly according to claim 2, characterized in that, the core (10) further comprises a cylinder (11) for forming a yoke, and the teeth (12) protrude from the The inner wall of the cylinder (11), the liquid separation unit (22) includes: a liquid separating ring plate (221), which is covered on the end surface of the cylinder (11) and connected to the conduction unit (21); and, The tooth plate (222) protrudes from the inner edge of the liquid separation ring plate (221) and covers the end surface of the tooth portion (12); The liquid separation channel (223) extends radially along the liquid separation ring plate (221), one end of which penetrates the liquid separation ring plate (221) and communicates with the hollow inner cavity (211), and the other end penetrates The tooth plate (222) communicates with the cooling liquid path (121). 4. The motor stator assembly according to claim 3, characterized in that, the width of the liquid separation channel (223) tends to decrease along the direction close to the axis of the core (10); and/or, In a plane perpendicular to the axis of the core (10), the width of the projected shape of the cooling liquid passage (121) tends to decrease along the direction close to the axis of the core (10). 5. The motor stator assembly according to claim 2, characterized in that the liquid separation unit (22) comprises a first cladding plate (2211) and a second cladding plate (2211) stacked along the axial direction of the core body (10). A cover plate (2212), the first cover plate (2211) is attached to the end surface of the core (10), and the liquid separation channel (223) is opened, and the second cover plate (2212) is opened There is a liquid distribution port (2213), which is fixedly connected with the conduction unit (21), the liquid distribution port (2213) communicates with the hollow inner cavity (211), and communicates with the liquid distribution channel (223) One end relatively away from the axis of the core (10). 6. The motor stator assembly according to claim 2, characterized in that, the conduction unit (21) is arranged opposite to the end face of the yoke of the core (10), and the liquid separation unit (22) has at least A part fits with the end surface of the tooth portion (12), and forms a step with the conduction unit (21); The motor stator assembly also includes a winding (30), the winding (30) is wound on the outside of the tooth (12) and the liquid separation unit (22), and the step is used to avoid the winding ( 30). 7. The motor stator assembly according to claim 2, characterized in that, the conduction unit (21) and the liquid separation unit (22) are separately formed and fixedly connected, and the splicing body (20) also includes Anti-leakage seal (23); between the conduction unit (21) and the liquid separation unit (22), and between the conduction unit (21) and the motor housing (40) through the A leak-proof seal (23) is hermetically connected to seal the hollow interior (211). 8. The motor stator assembly according to claim 1, characterized in that, the cooling liquid path (121) includes a first cooling liquid path and a second cooling liquid path, and any of the cooling liquid paths (121) passes through all The two ends of the core (10) form a first opening (1211) and a second opening (1212) respectively. A body (201) and a second splice body (202); In the first cooling liquid path, its first opening (1211) communicates with the transfer liquid path (203) of the first splicing body (201), and its second opening (1212) is exposed; the second cooling liquid path Among them, the first opening (1211) is exposed, and the second opening (1212) communicates with the transfer liquid path (203) of the second splicing body (202). 9. The motor stator assembly according to claim 8, characterized in that, the first cooling liquid passage and the second cooling liquid passage are alternately arranged one by one along the circumferential direction of the core body (10); or, Along the circumferential direction of the core body (10), the first cooling liquid passages and the second cooling liquid passages are alternately arranged in groups. 10. The motor stator assembly according to claim 8, characterized in that, the first splicing body (201) has a plurality of first accumulators arranged at intervals along the circumferential direction of the core body (10) and communicated with each other. The second splicing body (202) has a plurality of second liquid storage chambers arranged at intervals along the circumference of the core (10) and communicated with each other, and the first liquid storage chambers communicate with the first liquid storage chambers. A first opening (1211) of a cooling liquid path, and the second liquid storage chamber communicates with a second opening (1212) of the second cooling liquid path. 11. The motor stator assembly according to claim 10, characterized in that, in the circumferential direction of the core body (10), the first liquid storage chamber and the second liquid storage chamber are mutually misaligned one by one; or, In the circumferential direction of the core body (10), the first liquid storage bin and the second liquid storage bin are misplaced in groups; or, At least one of the first splicing body (201) and the second splicing body (202) is formed separately from the core body (10). 12. A drive motor, characterized in that, the drive motor comprises a motor housing (40), a motor rotor assembly and the motor stator assembly as claimed in any one of claims 1-11, the electric motor The casing (40) is fixedly connected with the motor stator assembly, and the motor rotor assembly is arranged inside the core body (10). 13. The drive motor according to claim 12, characterized in that, the motor housing (40) is provided with a limiting step (43), and the limiting step (43) abuts against the spliced body (20), to limit the movement of the motor stator assembly relative to the motor housing (40) along the axial direction of the core (10); and/or, The transfer liquid path (203) passes through the splicing body (20) to form a transfer inlet (2111), and the transfer inlet (2111) faces the inner peripheral surface of the motor housing (40), and the motor There is an overflow liquid path (42) communicating with the transfer inlet (2111) between the housing (40) and the motor stator assembly, and the motor housing (40) is opened with a (42) motor coolant injection port (41). 14. A vehicle, characterized in that the vehicle comprises the drive motor according to claim 12 or claim 13.

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