Position identification assembly and electronic cooling oil pump applying same

Abstract

The position identification assembly comprises a shell, a rotating assembly and a magnetic ring, the shell is provided with a plurality of cavities and through holes communicated with the cavities, the rotating assembly comprises a rotating shaft, a stator and a rotor, the rotating shaft is arranged in the cavities of the shell, and the rotor is arranged in the middle of the rotating shaft. The stator is arranged between the rotor and the inner side wall of the shell and is used for driving the rotor to rotate, and the magnetic ring is arranged at the left end part of the rotating shaft and is fixedly connected with the rotating shaft, so that the magnetic ring and the rotor jointly form a structure for reflecting the position change of the rotor through the magnetic field effect of the magnetic ring and preventing the magnetic ring from axially slipping. The problems that in the prior art, the relative position of the magnetic ring and the rotor of the electronic cooling oil pump is not accurately positioned, so that the control precision is poor, and axial falling prevention of the rotor is not considered are solved.

Description

Technical Field

[0001] This utility model belongs to the field of electronic cooling oil pump technology, specifically relating to a position identification component and an electronic cooling oil pump using the same. Background Technology

[0002] Electronic cooling oil pumps need to consider their operation at low temperatures. During low-temperature operation, electronic cooling oil pumps should operate at low speed and high torque, which places high demands on the control of electronic cooling oil pumps, especially on obtaining the accurate position of the rotor. Only by accurately determining the rotor position can the stator be energized, thus ensuring the reliability of the cooling oil pump during low-temperature operation.

[0003] Currently, most electronic cooling oil pumps on the market use a magnetic ring plus sensor to obtain the rotor position. However, they do not have corresponding designs for the precise positioning of the relative position of the magnetic ring and the rotor, or for a highly reliable and compact axial anti-disengagement mechanism. This affects the control accuracy of the electronic cooling oil pump controller and ultimately the operational reliability of the electronic cooling oil pump. Utility Model Content

[0004] To address the shortcomings of the prior art, this utility model provides a position identification component and an electronic cooling oil pump using the same.

[0005] The purpose of this application is achieved through the following technical solution:

[0006] Firstly, a location recognition component is provided, comprising:

[0007] The outer shell has multiple cavities and through holes communicating with the cavities;

[0008] A rotating assembly includes a shaft, a stator, and a rotor. The shaft is disposed within a cavity of the housing, and the rotor is disposed at the center of the shaft. The stator is disposed between the rotor and the inner wall of the housing, and is used to drive the rotor to rotate.

[0009] A magnetic ring is disposed at the left end of the rotating shaft and fixedly connected to the rotating shaft, so that the magnetic ring and the rotor together constitute a structure that reflects the positional change of the rotor through the magnetic field of the magnetic ring and prevents the magnetic ring from slipping axially.

[0010] In some embodiments, the end of the shaft is press-fitted by physical riveting, and the outer diameter of the shaft is larger than the inner diameter of the magnetic ring to prevent the shaft from coming out of the magnetic ring.

[0011] In some embodiments, the inner hole of the magnetic ring and the end of the rotating shaft both have flat portions and are assembled and connected through the flat portions. The center line formed by the magnetic ring and the rotating shaft coincides with the center line of the rotor, which is used to eliminate the circular rotation of the rotating shaft in the axial section.

[0012] In some embodiments, the arcuate section of the flat portion of the magnetic ring is defined as one magnetic pole and the corresponding other section is defined as another magnetic pole.

[0013] In some embodiments, the flat portion of the magnetic ring is disposed on the polarity interface between the two magnetic poles, such that the magnetic field on the axial cross section of the magnetic ring is not completely continuous, and there is a section on the left and right sides of the polarity interface of the magnetic ring with a continuously equal magnetic field value.

[0014] Secondly, an electronic cooling oil pump is provided, which, in addition to the aforementioned position recognition component, also includes:

[0015] A drive plate, located at the left end of the housing, is used to control the stator to generate a magnetic field, thereby driving the rotor to rotate.

[0016] A position sensor, disposed on the left side of the magnetic ring and connected to the drive plate, is used to convert changes in the magnetic field of the magnetic ring into electrical signals and transmit the signals to the drive plate; and

[0017] The pump head is located at the right end of the rotating shaft and rotates in conjunction with the rotating assembly.

[0018] The beneficial effects of this utility model are: the position recognition component of this utility model can effectively prevent the shaft from falling off along the axial direction and rotating in circles in the cross-sectional direction, and can accurately identify the relative position of the magnetic ring and the rotor, thereby improving the control accuracy and operational reliability of the entire electronic cooling oil pump. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an electronic cooling oil pump provided in one embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the structure of the rotating component provided in one embodiment of the present invention;

[0022] Figure 3 This is a utility model Figure 2 A magnified view of a section at point A in the middle;

[0023] Figure 4 This is a left view of the rotating component provided in one embodiment of the present invention;

[0024] Figure 5 This is a schematic diagram of the structure of the rotating shaft provided in one embodiment of the present invention;

[0025] Figure 6 This is a cross-sectional view of the rotor provided in one embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the magnetic ring provided in one embodiment of the present invention. Detailed Implementation

[0027] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0028] This invention provides a position recognition component and an electronic cooling oil pump using the same, solving the problems of poor control accuracy caused by inaccurate positioning of the magnetic ring and rotor in existing electronic cooling oil pumps, as well as the lack of consideration for rotor axial anti-disengagement. This invention also provides an electronic cooling oil pump using this position recognition component.

[0029] like Figure 1 As shown, in one embodiment, the position identification component 10 includes a housing 101, a rotating component 102, and a magnetic ring 103. The length extension direction of the housing 101 is a first direction X, and the direction perpendicular to the first direction is a second direction Y.

[0030] The outer casing 101 has a plurality of cavities extending along a first direction X and through holes communicating with the cavities; in one embodiment, such as Figure 1 As shown, the outer casing 101 includes a rear end cover 1011, a housing 1012, a support plate 1013, and a front end cover 1014. The housing 1012 has multiple cavities and through holes communicating with the cavities. The support plate 1013 is disposed at the left end of the housing 1012 and is sealed to the housing 1012. The rear end cover 1011 and the front end cover 1014 are respectively fixed to both ends of the housing 1012 by screws. The cavity between the support plate 1013, the housing 1012, the rear end cover 1011, and the front end cover 1014 is used to house the rotating assembly 102.

[0031] The rotating assembly 102 includes a rotating shaft 1021, a stator 1022, and a rotor 1023. The rotating shaft 1021 is disposed within the cavity of the housing 101, and the rotor 1023 is disposed in the middle of the rotating shaft 1021. The stator 1022 is disposed between the rotor 1023 and the inner wall of the housing 101, and is used to drive the rotor 1023 to rotate. In one embodiment, as shown... Figure 2-6 As shown, the rotating assembly 102 includes a rotating shaft 1021, a stator 1022, a rotor 1023, a first bearing 1024, and a second bearing 1025. The rotating shaft 1021 extends along a first direction X and is disposed within the cavity of the housing 1012. The rotating shaft 1021 is a component with a large shaft diameter in the middle and small shaft diameters at both ends, and the two ends extend in a stepped shape. The rotor 1023 is protruding from the middle section of the rotating shaft 1021. The rotor 1023 has a groove 1026a inside to accommodate a permanent magnet 1026. The rotating shaft 1021 has a positioning hole 1026b and two steps on both sides of the step, which are also flattened portions 1021a for assembling the rotating shaft 1021 with other components. The first bearing 1024 is disposed at the left end of the rotating shaft 1021 and the second bearing 1025 is disposed at the right end of the rotating shaft 1021 and connected to the inner hole of the housing 1012, so that the rotor 1023 is completely fixed relative to the housing 1012. The stator 1022 is fitted on the outer wall of the rotor 1023 and contacts the inner wall of the housing 1012.

[0032] A magnetic ring 103 is disposed at the left end of the rotating shaft 1021 and fixedly connected to the rotating shaft 1021, such that the magnetic ring 103 and the rotor 1023 together constitute a structure that reflects the positional change of the rotor 1023 through the magnetic field of the magnetic ring 103 and prevents the magnetic ring 103 from axially slipping off; in one embodiment, such as Figure 2 and Figure 7As shown, the magnetic ring 103 is pre-magnetized and connected to the left end of the rotating shaft 1021 through the flat part 1031 of the magnetic ring 1031 in its inner hole. The inner sidewall of the magnetic ring 103 is fixedly connected to the rotating shaft 1021 by adhesive. The end face of the step at the left end of the rotating shaft 1021 has an extension that extends beyond the magnetic ring 103. The magnetic ring 103 and the first bearing 1024 abut against and limit the step at the left end of the rotating shaft 1021, respectively. The implemented magnetic ring 103 and the first bearing 1024 cannot be replaced or misinstalled. In one embodiment, the extension of the left side of the rotating shaft 1021 beyond the magnetic ring 103 is processed by riveting technology. After the magnetic ring 103 is bonded to the corresponding position of the rotating shaft 1021, the outer diameter of the left side of the rotating shaft 1021 is increased by physical riveting. At this time, the outer diameter of the left side of the rotating shaft 1021 is larger than the inner diameter of the magnetic ring 103, but it will not cause damage to the magnetic ring 103. This ensures that the magnetic ring 103 will not axially detach or fail to function even if the adhesive fails. In one embodiment, both the inner hole of the magnetic ring 103 and the end of the rotating shaft 1021 are provided with flat portions and are assembled and connected through the flat portions. The center line formed by the magnetic ring 103 and the rotating shaft 1021 coincides with the center line of the rotor 1023, ensuring that the magnetic ring 103 will not rotate relative to the rotating shaft 1021 in the first direction X under any circumstances. At the same time, the magnetic pole center line of the magnetic ring 103 can always be kept consistent with the magnetic pole center line of the rotor 1023 that houses the permanent magnet 1026 as needed. The magnetic ring 103 can accurately reflect the current position of the rotor 1023. The arc segment of the flat portion 1031 of the magnetic ring is defined as one magnetic pole and the corresponding other segment is defined as another magnetic pole. In one embodiment, the arc segment of the flat portion 1031 of the magnetic ring is defined as the N-pole arc surface or the S-pole arc surface, and the corresponding other segment is defined as the S-pole arc surface or the N-pole arc surface. The flat portion 1031 of the magnetic ring is disposed on the polarity interface between the S-pole and the N-pole, so that the magnetic field on the axial section of the magnetic ring 103 is not completely continuous. There is a section on the left and right sides of the polarity interface of the magnetic ring 103 with a continuous and equal magnetic field value.

[0033] In one embodiment, such as Figure 1 As shown, an electronic cooling oil pump 20 is provided, which, in addition to the position recognition component 10 mentioned above, also includes a drive board 201, a position sensor, and a pump head 203.

[0034] A drive plate 201 is disposed at the left end of the housing 101 and is used to control the stator 1022 to generate a magnetic field, thereby driving the rotor 1023 to rotate. In one embodiment, the drive plate 201 is disposed in the cavity between the support plate 1013 and the protective cover through its outer protective cover. The drive plate 201 controls the stator 1022 to generate a rotating magnetic field by absorbing external electrical energy, and the rotor 1023 is attracted by the rotating magnetic field of the stator 1022 to rotate synchronously. A position sensor is disposed on the left side of the magnetic ring 103 and connected to the drive plate 201, and is used to convert the magnetic field change of the magnetic ring 103 into an electrical signal and transmit the signal to the drive plate 201. The pump head 203 is disposed at the right end of the rotating shaft 1021 and rotates in coordination with the rotating assembly 102. In one embodiment, the positioning hole 1026b of the rotor 1023 is fitted with the flat portion 1021a of the shaft 1021 and the center line formed by the fit coincides with each other, ensuring that the relative position of the pump head 203 is synchronized with the rotor 1023, so that the drive plate 201 can determine the load condition of the pump head 203 by the change of the magnetic field of the magnetic ring 103.

[0035] In one embodiment, such as Figure 1 As shown, after the drive board 201 identifies the current position of the rotor 1023 relative to the stator 1022 through the position sensor 202, it energizes the winding of the corresponding stator 1022 to generate an electromagnetic field. The electromagnetic field attracts the magnetic poles provided on the rotor 1023, thereby causing the rotor 1023 to rotate. The rotation of the rotor 1023 synchronously drives the pump head 203 on the right to rotate, ultimately realizing the continuous operation of the whole machine.

[0036] The position recognition component 10 provided by this utility model eliminates the circular rotation of the shaft in the cross-sectional direction by setting a flat part at the connection between the shaft 1021 and the magnetic ring 103. The riveting treatment at the left end of the shaft 1021 prevents the shaft from falling off along the axial direction. The magnetic field arrangement of the magnetic ring 103 is reasonable, which can accurately identify the relative position of the magnetic ring and the rotor, thereby improving the control accuracy and operational reliability of the entire electronic cooling oil pump.

[0037] The above description is merely a preferred embodiment of one or more embodiments of this specification and is not intended to limit the scope of one or more embodiments of this specification. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments of this specification should be included within the protection scope of one or more embodiments of this specification.

Claims

1. A location recognition component, characterized in that, include: The outer shell has multiple cavities and through holes communicating with the cavities; A rotating assembly includes a shaft, a stator, and a rotor. The shaft is disposed within a cavity of the housing, and the rotor is disposed at the center of the shaft. The stator is disposed between the rotor and the inner wall of the housing, and is used to drive the rotor to rotate. A magnetic ring is disposed at the left end of the rotating shaft and fixedly connected to the rotating shaft, so that the magnetic ring and the rotor together constitute a structure that reflects the position change of the rotor through the magnetic field of the magnetic ring and prevents the magnetic ring from slipping axially. The end of the rotating shaft is press-fitted by physical riveting, and the outer diameter of the rotating shaft is larger than the inner diameter of the magnetic ring to prevent the rotating shaft from coming out of the magnetic ring. The inner hole of the magnetic ring and the end of the rotating shaft both have flat portions and are assembled and connected through the flat portions. The center line formed by the magnetic ring and the rotating shaft coincides with the center line of the rotor, which is used to eliminate the circular rotation of the rotating shaft in the axial section.

2. The location identification component according to claim 1, characterized in that, The flat section of the magnetic ring is defined as one magnetic pole, and the corresponding other section is defined as another magnetic pole.

3. The location identification component according to claim 2, characterized in that, The flat portion of the magnetic ring is disposed on the polarity interface between the two magnetic poles, so that the magnetic field on the axial cross section of the magnetic ring is not completely continuous, and there is a section on the left and right sides of the polarity interface of the magnetic ring with a continuously equal magnetic field value.

4. An electronic cooling oil pump, characterized in that, In addition to the location identification component described in any one of claims 1-3, it also includes: A drive plate, located at the left end of the housing, is used to control the stator to generate a magnetic field, thereby driving the rotor to rotate. A position sensor, disposed on the left side of the magnetic ring and connected to the drive plate, is used to convert changes in the magnetic field of the magnetic ring into electrical signals and transmit the signals to the drive plate; and The pump head is located at the right end of the rotating shaft and rotates in conjunction with the rotating assembly.

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