Temperature sensor lock, motor, powertrain, and vehicle

Abstract

The application provides a temperature sensor lock, a motor, a power assembly and a vehicle, comprising a connecting wall and two clamping walls, a first clamping groove and a second clamping groove are formed between the two clamping walls, the clamping wall is provided with a clamping surface between the first clamping groove and the second clamping groove, the clamping wall is provided with a bulging inclined surface in the first clamping groove, the upper and lower ends of the bulging inclined surface in the insertion direction are respectively formed with a narrow opening and a wide opening, and the clamping surface is protruded outward from the bulging inclined surface at the edge of the clamping wall on the opposite side. The narrow opening of the bulging inclined surface is arranged to drive the two clamping walls to be spread outward, the outermost peripheral axial welding end of the temperature sensor and the flat wire winding is located in the second clamping groove, the clamping surface and the connecting wall are radially clamped to the outermost peripheral axial welding end of the flat wire winding and the temperature sensor, so that the temperature sensor and the flat wire winding can be effectively attached, the elastic movement of the connecting wall is utilized, the parts processing tolerance is not affected, the assembly is convenient, and the automatic generation is easy to realize.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and more particularly to a temperature sensor latch, a motor, a powertrain, and a vehicle. Background Technology

[0002] New energy vehicles are characterized by being environmentally friendly and less polluting because they do not burn gasoline or diesel fuel. With the vigorous promotion and application of new energy power generation such as hydropower, wind power, solar power and nuclear power, many new energy vehicles are gradually being promoted and applied, such as new energy electric cars, new energy electric buses, new energy electric trucks, new energy electric cleaning vehicles, new energy electric rail transit vehicles, new energy electric air vehicles and new energy electric shipping vehicles.

[0003] New energy vehicles are generally equipped with batteries, motor control devices, motors, and power generation devices. The power transistors in the motor control device receive the DC power output from the battery and invert it into AC power to output to the motor. The motor then outputs rotational driving force to drive the power generation devices such as wheels and propellers, thereby propelling the vehicle forward.

[0004] With the development of new energy main drive motors, flat wire motors using rectangular copper wires have become the mainstream solution for main drive motors because the copper wires in the stator slots can be arranged in a regular and compact manner, thereby improving the motor's heat dissipation capacity and power density.

[0005] Unlike the traditional round wire stator, the components of the flat wire stator have undergone structural or formal changes. For example, the copper wire has been changed to a rectangular wire, and the iron core slot has also become a rectangular slot. If the temperature sensor used for stator temperature monitoring were to adopt a traditional form, there would be many drawbacks.

[0006] Traditional round wire temperature sensors have a cylindrical external structure for the sensing element. This is fixed to the end winding or bound to the outer surface using binding wire. However, fixing with binding wire is time-consuming, requires multiple workstations to match production line rhythm, and is difficult to automate. Furthermore, the snap-fit ​​fixing method, if designed too tightly, is difficult to assemble or can easily damage the sensor. If designed too loosely, the sensor will not adhere well to the copper wire, resulting in insensitive temperature sensing. The manufacturing tolerances of the components themselves can also cause these problems. Summary of the Invention

[0007] The primary objective of this invention is to provide a temperature sensor latch that is widely adaptable and easy and stable to assemble.

[0008] A second objective of the present invention is to provide a motor having the aforementioned temperature sensor latch.

[0009] A third objective of the present invention is to provide a powertrain having the aforementioned motor.

[0010] A fourth objective of the present invention is to provide a vehicle having the aforementioned motor.

[0011] To achieve the first objective of this invention, a temperature sensor latch is provided, comprising a connecting wall and two clamping walls, the two clamping walls being respectively connected to both sides of the connecting wall and being separate from each other; a first clamping groove and a second clamping groove are formed between the two clamping walls, the second clamping groove being closer to the connecting wall than the first clamping groove, and both the first and second clamping grooves extending along the insertion direction; at least one clamping wall is provided with a locking surface between the first and second clamping grooves, and at least one clamping wall is provided with an expanding inclined surface within the first clamping groove, the locking surface and the expanding inclined surface being provided on the same clamping wall, the expanding inclined surface forming a narrow opening with the clamping wall on the opposite side at its upper end in the insertion direction, and forming a wide opening with the clamping wall on the opposite side at its lower end in the insertion direction; the locking surface protrudes outward from the expanding inclined surface at its edge facing the clamping wall on the opposite side.

[0012] As can be seen from the above scheme, as the latch is pressed in along the insertion direction, the outermost axial welding end is located in the first clamping groove and is clamped and fixed by the expanding inclined surface and the clamping wall. At the same time, the narrow opening of the expanding inclined surface drives the two clamping walls to open outward. Since the outermost axial welding ends of the temperature sensor and the flat wire winding are both located in the second clamping groove, the clamping surface and the connecting wall radially clamp the outermost axial welding end of the flat wire winding and the temperature sensor. This not only enables the temperature sensor and the flat wire winding to achieve an effective fit, but also utilizes the elastic movement of the two connecting walls, thus being unaffected by the machining tolerances of the parts. The elastic movement of the expanding inclined surface and the clamping surface is also used to accommodate winding copper wires of different sizes. In addition, by inserting the winding along the insertion direction, the sensor and the axial end of the winding can be properly fitted. The assembly is convenient, the operation time is short, a single station can meet the production line cycle requirements, and it is easy to achieve automated production.

[0013] A further improvement is that the connecting wall has a sensor mounting groove on the side facing the second clamping groove. The sensor mounting groove has a mating bottom surface and mating side walls located on both sides of the mating bottom surface. The mating bottom surface is opposite to the clamping surface.

[0014] As can be seen from the above, the temperature sensor can be pre-positioned using the sensor mounting slot, and the mating bottom surface and clamping surface are aligned to improve the tightness of the fit between the temperature sensor and the axial end of the winding and the assembly stability.

[0015] A further proposed solution is to have a sensor mounting slot extending along the insertion direction, with a stop surface at the upper end of the sensor mounting slot in the insertion direction.

[0016] As can be seen from the above, the position of the temperature sensor can be fixed by the stop surface, and the position of the temperature sensor is not affected by the installation process as it is pressed in the insertion direction.

[0017] A further proposed solution is that both the first and second clamping slots are arranged through the insertion direction.

[0018] As can be seen from the above, since the first and second clamping slots are mainly used for assembling the axial end of the winding, the through-type design allows the temperature sensor to contact the axial end of the winding at different positions in the insertion direction, and also allows the temperature sensor to adjust its assembly position as needed.

[0019] A further proposed solution is to have both the clamping surface and the expansion ramp on the same clamping wall.

[0020] As can be seen from the above, placing the clamping surface and the expansion bevel on the same clamping wall facilitates the deformation and movement of the clamping surface of the clamping wall, thereby facilitating the mating connection with the welding end.

[0021] A further improvement is that the connecting wall is provided with a directional groove on the back side of the second clamping groove, and the directional groove extends along the insertion direction.

[0022] As can be seen from the above, by using the directional groove as a fulcrum, the two clamping walls can be stably stretched outwards. The arrangement of the through groove facilitates the wiring of the temperature sensor and is also more conducive to the deformation of the directional groove.

[0023] A further improvement is that the expansion bevel has an inlet bevel at the lower end of the wide opening based on the insertion direction, and the inlet bevel is offset outward relative to the expansion bevel.

[0024] As can be seen from the above, the inclined plane serves as a guide and facilitates the insertion of the lock, while the expansion inclined plane mainly determines the opening angle of the lock and the clamping stability.

[0025] To achieve the second objective of this invention, the present invention provides an electric motor, including a stator core, a flat wire winding, and a rotor. The flat wire winding is disposed on the outer periphery of the stator core, and the rotor is rotatably disposed in the middle of the stator core. The motor also includes a temperature sensor and a temperature sensor latch as described above. The second outermost axial welding end of the flat wire winding is located in a first clamping groove, and the second outermost axial welding end is clamped by the expanding inclined surface and the clamping wall on the opposite side. The temperature sensor and the outermost axial welding end of the flat wire winding are both located in a second clamping groove. The clamping surface, the outermost axial welding end, the temperature sensor, and the connecting wall are closely adjacent to each other radially from the inside to the outside.

[0026] To achieve the third objective of this invention, this invention provides a powertrain including a motor and a transmission as described above, wherein the motor is connected to the transmission.

[0027] To achieve the fourth objective of the present invention, the present invention provides a means of transportation, including an electric motor as described above. Attached Figure Description

[0028] Figure 1 This is a structural diagram of an embodiment of the temperature sensor latch of the present invention.

[0029] Figure 2 This is a structural diagram of the temperature sensor locking embodiment of the present invention from another perspective.

[0030] Figure 3 This is a structural diagram of the temperature sensor locking embodiment of the present invention from another perspective.

[0031] Figure 4 This is a structural diagram of the stator in an embodiment of the motor of the present invention.

[0032] Figure 5 This is a schematic diagram of the installation of the temperature sensor latch in the motor embodiment of the present invention.

[0033] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0034] Temperature sensor latch example:

[0035] Reference Figures 1 to 5 The temperature sensor latch 1 includes a connecting wall 11 and two clamping walls 12. The two clamping walls 12 are respectively connected to both sides of the connecting wall 11. The connecting wall 11 extends along the insertion direction X, and the two clamping walls 12 extend radially along the stator core. The two clamping walls 12 are located on the same side of the connecting wall 11 and are separated from each other. A first clamping groove 14 and a second clamping groove 13 are formed between the two clamping walls 12. The first clamping groove 14, the second clamping groove 13 and the connecting wall 11 are arranged radially along the stator core. The second clamping groove 13 is closer to the connecting wall 11 than the first clamping groove 14. Both the first clamping groove 14 and the second clamping groove 13 extend along the insertion direction X and are arranged in a through-type configuration.

[0036] The structures on the two clamping walls 12 are arranged in a centrally symmetrical manner. Taking one of the clamping walls 12 as an example, a clamping surface 131 is provided between the first clamping groove 14 and the second clamping groove 13 of the clamping wall 12. The two clamping surfaces 131 face each other and form a slit. The slit connects the first clamping groove 14 and the second clamping groove 13. An expansion-shaped inclined surface 141 is provided in the first clamping groove 14 of the clamping wall 12. The clamping surface 131 and the expansion-shaped inclined surface 141 on the same side are both provided on the same clamping wall 12. The expansion-shaped inclined surface 141 forms a narrow opening 143 with the expansion-shaped inclined surface 141 of the clamping wall 12 on the opposite side at the upper end in the insertion direction X. The expansion-shaped inclined surface 141 forms a wide opening 144 with the expansion-shaped inclined surface 141 of the clamping wall 12 on the opposite side at the lower end in the insertion direction X. The width of the narrow opening 143 is smaller than the width of the wide opening 144. An expansion-shaped inclined surface 141 has an inlet inclined surface 142 at the lower end of the wide opening 144 based on the insertion direction X. The inlet inclined surface 142 is offset outward relative to the expansion-shaped inclined surface 141, thereby forming an entrance between the two inlet inclined surfaces 142. The width of the wide opening 144 is smaller than the width of the entrance. A clamping surface 131 protrudes outward from the edge of the clamping wall 12 facing the opposite side of the expansion-shaped inclined surface 141 and the inlet inclined surface 142, thereby forming a side stop for the expansion-shaped inclined surface 141 and the inlet inclined surface 142.

[0037] The connecting wall 11 has a sensor mounting groove 15 on the side facing the second clamping groove 13. The sensor mounting groove 15 has a mating bottom surface 152 and mating side walls 153 located on both sides of the mating bottom surface 152. The mating bottom surface 152 and the clamping surface 131 are both arranged in a planar manner and are arranged opposite to each other. The sensor mounting groove 15 extends along the insertion direction X. The sensor mounting groove 15 has two stop surfaces 151 at the upper end of the insertion direction X. The two stop surfaces 151 are located on both sides and close to the mating side walls 153. The connecting wall 11 has a directional groove 112 on the back side of the second clamping groove 13. The directional groove 112 extends along the insertion direction X. The connecting wall 11 has a through groove 111 at the lower end of the directional groove 112 in the insertion direction X. The through groove 111 is arranged in the shape of a dovetail groove.

[0038] Motor Example:

[0039] Reference Figure 4 and Figure 5The motor includes a stator core 25, a flat wire winding 24, and a rotor. The flat wire winding 24 is disposed on the outer periphery of the stator core 25. The flat wire winding 24 has multiple welding ends at the axial ends of the stator core 25. Each welding end is made of two copper wires arranged side by side along the axial direction and welded together. Since the stator core 25 has multiple slot layers arranged radially, the welding ends are not only distributed circumferentially but also arranged in multiple layers radially. Therefore, the flat wire winding 24 has multiple outermost axial welding ends 22 and second outermost axial welding ends 23. The outermost axial welding ends 22 are located radially outside the second outermost axial welding ends 23. The rotor is rotatably disposed in the middle of the stator core 25.

[0040] The motor also includes a temperature sensor 21 and a temperature sensor latch 1 as described in the above embodiment. When assembling the temperature sensor latch 1 and the temperature sensor 21, the temperature sensor 21 is first pre-installed into the sensor mounting slot 15. The temperature sensor 21 is adjacent to the two stop surfaces 151 and forms a limit. Then, the temperature sensor latch 1 is pressed against the welding end of the flat wire winding 24 along the insertion direction X. The insertion direction X is parallel to the axial direction of the stator core 25.

[0041] The temperature sensor latch 1 is located on the outer periphery of the flat wire winding 24. As the temperature sensor latch 1 is pressed in along the insertion direction X, the second outermost axial welding end 23 of the flat wire winding 24 first slides with the guide inclined surface 142, and then slides with the expansion inclined surface 141. Subsequently, the second outermost axial welding end 23 of the flat wire winding 24 is located in the first clamping groove 14. The expansion inclined surface 141 and the clamping wall 12 on the opposite side clamp the second outermost axial welding end 23, thereby driving the two clamping walls 12 to expand outward. At the same time, the temperature sensor 21 and the outermost axial welding end 22 of the flat wire winding 24 are both located in the second clamping groove. Within 13, the clamping surface 131, the outermost axial welding end 22, the temperature sensor 21, and the connecting wall 11 are closely adjacent to each other radially from the inside to the outside. The outermost axial welding end 22 and the temperature sensor 21 are separated from the two clamping walls 12 respectively. The clamping of the outermost axial welding end 23 by the two clamping walls 12 provides a position holding force for the temperature sensor latch 1. Furthermore, the radial clamping of the outermost axial welding end 22 and the temperature sensor 21 also keeps the outermost axial welding end 22 and the temperature sensor 21 closely adjacent and in contact, allowing the temperature sensor 21 to stably detect the winding temperature.

[0042] Powertrain Example:

[0043] The powertrain includes the motor and transmission described in the above embodiments, with the motor connected to the transmission.

[0044] Example of a means of transportation:

[0045] The vehicles include motors as described above, and can be new energy electric cars, new energy electric buses, new energy electric freight trucks, new energy electric cleaning vehicles, new energy electric rail transit vehicles, new energy electric air vehicles, new energy electric shipping vehicles, etc.

[0046] Of course, the above embodiments are only preferred embodiments of this case. In practical applications, there can be more variations, such as setting a clamping surface and an expansion inclined surface on only one side of the clamping wall, or setting a clamping surface on one side of the clamping wall and an expansion inclined surface on the other side of the clamping wall, or not setting a sensor mounting groove and using a second clamping groove to directly clamp and fix the axial welding end and the thermal sensor. All of these can achieve the purpose of this invention.

[0047] As can be seen from the above, in this case, the latch is pressed in along the insertion direction, and then the outermost axial welding end is located in the first clamping groove and is clamped and fixed by the expanding inclined surface and the clamping wall. At the same time, the narrow opening of the expanding inclined surface is used to drive the two clamping walls to expand outward. The outermost axial welding ends of the temperature sensor and the flat wire winding are both located in the second clamping groove, so that the clamping surface and the connecting wall clamp the outermost axial welding end of the flat wire winding and the temperature sensor radially. This not only enables the temperature sensor and the flat wire winding to achieve an effective fit, but also utilizes the elastic movement of the two connecting walls, so it is not affected by the machining tolerance of the parts. The elastic movement of the expanding inclined surface and the clamping surface is also used to accommodate winding copper wires of different sizes. In addition, by inserting the winding along the insertion direction, the sensor and the axial end of the winding can be properly matched. The assembly is convenient, the operation time is short, a single station can meet the production line cycle requirements, and it is easy to realize production automation.

Claims

1. A temperature sensor latch, characterized in that, It includes a connecting wall and two clamping walls, the two clamping walls being respectively connected to both sides of the connecting wall and the two clamping walls being separate from each other; A first clamping groove and a second clamping groove are formed between the two clamping walls. The second clamping groove is closer to the connecting wall than the first clamping groove. Both the first clamping groove and the second clamping groove extend along the insertion direction. At least one of the clamping walls is provided with a clamping surface between the first clamping groove and the second clamping groove, and at least one of the clamping walls is provided with an expanding inclined surface in the first clamping groove. The expanding inclined surface forms a narrow opening with the clamping wall on the opposite side at the upper end in the insertion direction, and forms a wide opening with the clamping wall on the opposite side at the lower end in the insertion direction. The clamping surface protrudes outward from the edge of the clamping wall facing the opposite side of the expansion-shaped inclined surface; The connecting wall has a sensor mounting groove on the side facing the second clamping groove. The sensor mounting groove has a mating bottom surface and mating side walls located on both sides of the mating bottom surface. The mating bottom surface is opposite to the clamping surface.

2. The temperature sensor latch according to claim 1, characterized in that: The sensor mounting slot extends along the insertion direction, and a stop surface is provided at the upper end of the sensor mounting slot in the insertion direction.

3. The temperature sensor latch according to claim 2, characterized in that: Both the first clamping groove and the second clamping groove are provided through the insertion direction.

4. The temperature sensor latch according to claim 1, characterized in that: Both the clamping surface and the expanding inclined surface are provided on the same clamping wall.

5. The temperature sensor latch according to any one of claims 1 to 4, characterized in that: The connecting wall has a change-oriented groove on the back side of the second clamping groove, and the change-oriented groove extends along the insertion direction.

6. The temperature sensor latch according to any one of claims 1 to 4, characterized in that: The expanding inclined surface has an inlet inclined surface at the lower end of the wide opening based on the insertion direction, and the inlet inclined surface is offset outward relative to the expanding inclined surface.

7. An electric motor, characterized in that, It includes a stator core, a flat wire winding, and a rotor. The flat wire winding is disposed on the outer periphery of the stator core, and the rotor is rotatably disposed in the middle of the stator core. Its features are: The motor further includes a temperature sensor and a temperature sensor latch as described in any one of claims 1 to 6 above, the second outermost axial welding end of the flat wire winding is located in the first clamping groove, and the expanding inclined surface and the clamping wall on the opposite side clamp the second outermost axial welding end. The temperature sensor and the outermost axial welding end of the flat wire winding are both located in the second clamping groove, and the clamping surface, the outermost axial welding end, the temperature sensor and the connecting wall are closely adjacent to each other in the radial direction from the inside to the outside.

8. A powertrain, characterized in that, It includes the motor and the transmission as described in claim 7, wherein the motor is connected to the transmission.

9. A means of transport, characterized in that, Including the motor as described in claim 7 above.

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