Electronic oil pump brushless motor

Abstract

The invention belongs to the technical field of brushless motors, and discloses an electronic oil pump brushless motor which comprises an end cover, the end cover is fixedly connected with a shell through a bolt, the side, away from the end cover, of the shell is fixedly connected with a mounting plate, an inner cavity of the end cover is fixedly connected with a sealing plate, and a pressurizing oil cavity is formed in the middle of the sealing plate. Through cooperation of the bimetallic strip, the lever and other structures, when the brushless motor generates high heat, heat dissipation can be automatically accelerated, the bimetallic strip is used in cooperation with the lever, the temperature of the motor rises to enable the bimetallic strip to be rapidly heated to generate bending deformation, the supporting rod is matched to enable the lever to rotate, the lever drives a connecting plate, and then a movable ring block is pulled; and finally, the adjustable spiral plate and the fixed spiral plate get close to each other to enlarge an oil liquid flow channel, the higher the oil pumping speed is, the more the heat generated by the motor is, the curvature of the bimetallic strip is also increased, then the flow speed of the oil liquid in the flow channel is increased, and then the heat dissipation speed is increased.

Description

Technical Field

[0001] The invention belongs to the technical field of brushless motors, in particular to an electronic oil pump brushless motor. Background Art

[0002] The electronic oil pump brushless motor consists of a brushless motor, an oil pump mechanical structure and an electronic control system. The core of the motor is the brushless motor. The electronic controller adjusts the current direction of the stator winding according to the signal of the rotor position sensor to achieve precise commutation and speed regulation. The rotation of the rotor is transmitted to the mechanical structure of the oil pump, such as gears, blades or plungers, through a coupling or direct drive shaft, pushing the oil to form pressure and flow. Compared with traditional brushed motors, the brushless design avoids carbon brush wear and improves energy efficiency and reliability.

[0003] In the existing technology, the heat dissipation of the brushless motor of the automobile oil pump, the permanent magnet of the brushless motor is sensitive to high temperature, and it is necessary to ensure that the heat dissipation system is effective to avoid demagnetization. For example, the operating temperature needs to be controlled within the range of -45°C to 150°C, and the oil circulates through an independent external cooling circuit, such as the spiral flow channel, heat dissipation fins or external oil cooler in the motor housing, to exchange heat with the heating components of the motor, but does not directly contact the internal electrical components. Among them, the existing spiral flow channel heat dissipation is usually an integrated fixed setting, and the cooling range of the motor is relatively consistent. Continuous and efficient cooling may occur, which can easily lead to a sudden drop in the internal temperature of the motor. The stator winding, bearings and other components produce periodic thermal stress due to differences in thermal expansion coefficients, which accelerates material fatigue. If the cooling effect needs to be adjusted, it is usually necessary to install a control valve and a liquid pump, which increases energy consumption and body weight. Summary of the Invention

[0004] In order to solve the problem of relatively consistent temperature reduction range of a fixed spiral flow channel proposed in the above background technology, the present invention provides an electronic oil pump brushless motor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a brushless motor for an electronic oil pump, comprising an end cover, the end cover being fixedly connected to a housing via bolts, a mounting plate being fixedly connected to a side of the housing away from the end cover, a sealing plate being fixedly connected to an inner cavity of the end cover, a pressurized oil chamber being defined in the middle of the sealing plate, a gear being rotatably connected to the middle of the inner cavity of the sealing plate, and further comprising: a flow channel regulating mechanism, wherein the flow channel regulating mechanism is connected to the housing; A positioning mechanism connected to the flow channel regulating mechanism; The flow channel regulating mechanism includes an adjustable spiral plate. After heating, the adjustable spiral plate generates displacement by bending the deformed metal, thereby regulating the size of the oil flow channel.

[0006] Preferably, the flow channel regulating mechanism also includes an inner shell, the outer wall of the inner shell is slidably connected to a movable ring block near the opening, one side of the movable ring block is fixed with a pair of hook rings, and the other side of the movable ring block is fixed to the end of the adjustable spiral plate, and the side walls of the outer shell are respectively provided with branch inlets and branch outlets.

[0007] Preferably, both side edges of the adjustable spiral plate are slidably connected between the outer shell and the inner shell through leak-proof strips, the end of the adjustable spiral plate away from the movable ring block is fixedly connected to a first blocking piece, and the edge of the outer shell is fixedly connected to at least one hemispherical airbag.

[0008] Preferably, the middle of the movable ring block is rotatably connected to a connecting plate, the side of the connecting plate away from the movable ring block is rotatably connected to a lever, one-fifth of the edge of the lever is rotatably connected to a support rod, and the side of the lever away from the connecting plate is rotatably connected to a bimetallic strip.

[0009] Preferably, the positioning mechanism comprises a fixed spiral plate abutting between the outer shell and the inner shell, and the bimetallic strip and the end of the support rod away from the lever are both fixed to the end of the fixed spiral plate.

[0010] Preferably, a second blocking piece is fixed to the end of the fixed spiral plate, and the second blocking piece is slidably engaged with the inner cavity of the movable ring block through a slot.

[0011] Preferably, one end of the fixed spiral plate away from the movable ring block is fixedly connected to the fixed ring block, and the first blocking piece is slidably engaged with the inner cavity of the fixed ring block through a slot.

[0012] Preferably, the tops of the fixed ring block and the movable ring block are slidably connected to the inner cavity of the outer shell through limiting slides, and thread grooves are symmetrically provided on both sides of the fixed ring block and the outer shell, and the two sides are threadedly connected to each other through a pair of positioning bolts, and the inner cavity of the fixed ring block is abutted against the inner shell through a rubber ring.

[0013] Preferably, a main shaft is fixedly connected to the middle of the sealing plate, and the main shaft rotates through the middle of the sealing plate and extends to the middle inner cavity of the outer shell. A rotor is fixedly connected to the outer wall of the main shaft, and a stator is provided on the outer wall of the rotor. The outer wall of the rotor is fixedly connected to the inner cavity of the inner shell, and a circuit board is fixedly connected to the side of the sealing plate away from the main shaft.

[0014] Preferably, the mounting plate and the lower end of the outer shell are commonly fixed with a heating element, the outer wall of the heating element is fixed with a controller, the upper end of the heating element is symmetrically fixed with an oil outlet pipe and an oil inlet pipe, the oil outlet pipe is connected to the boost oil chamber through the liquid outlet channel, and the branch inlet and branch outlet are connected to the liquid outlet channel.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention facilitates automatic accelerated heat dissipation when the brushless motor generates high heat by arranging the coordination of structures such as bimetallic strips and levers. By using the bimetallic strips in conjunction with the lever, the temperature of the motor increases, causing the bimetallic strips to be quickly heated and bent, and the levers are rotated in conjunction with the support rods. The levers drive the connecting plates, and then pull the movable ring blocks to generate axial displacement, and finally the adjustable spiral plates and the fixed spiral plates are brought closer to each other to increase the flow path of the oil. The faster the oil pumping speed, the more heat the motor generates, and the greater the curvature of the bimetallic strips. Subsequently, the contact area of the flow path is increased, thereby promoting an increase in the heat dissipation speed, and achieving a relatively constant temperature effect when the brushless motor is running.

[0016] The present invention facilitates moderate cooling of the brushless motor by arranging the coordination of structures such as an adjustable spiral plate, a fixed spiral plate and a hemispherical airbag, thereby avoiding a sudden drop in the internal temperature of the motor caused by continuous and efficient cooling, and avoiding periodic thermal stress generated by components such as the stator winding and bearings due to differences in thermal expansion coefficients, which accelerates material fatigue. By setting up two spiral plates, the heat dissipation method of the single spiral flow channel is changed. The adjustable spiral plate cooperates with the anti-leakage strips on the edges of both sides to ensure that there is basically no oil leakage during its movement and adjustment process. In addition, under the action of the hemispherical airbag to expand and contract to balance the cavity air pressure, the anti-leakage strip will not leak oil due to the pressure of the air pressure difference, thereby improving the adjustment stability of the adjustable spiral plate.

[0017] The present invention facilitates the maintenance of the brushless motor by providing the coordination of structures such as hook rings and positioning bolts. During disassembly, a pair of positioning bolts are loosened, and the hook ring can be hooked by an external hook rod-like tool to take out the movable ring block and the fixed ring block, as well as the components therebetween. During installation, the limiting slides on the side walls of the movable ring block and the fixed ring block are used to accurately reset them, which is beneficial to improving the installation speed and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the side sectional structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the partially enlarged structure at center A; Figure 3 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 4 This is a schematic side view of the three-dimensional structure of the present invention; Figure 5 This is a schematic diagram of the overall explosion relationship of the present invention; Figure 6 Schematic diagram of the structural coordination relationship between the outer shell and the inner shell of the present invention; Figure 7 It is a structural schematic diagram of the oil flow channel in an unregulated state of the present invention; Figure 8It is a structural schematic diagram of the oil flow channel in an adjusted state according to the present invention; Figure 9 Schematic diagram of the structural coordination relationship between the bimetallic strip and the lever of the present invention; Figure 10 This is a schematic diagram of the structural coordination relationship between the movable ring block and the hook ring of the present invention; Figure 11 It is a schematic diagram of the structural coordination relationship between the second blocking piece and the fixed spiral plate of the present invention.

[0019] In the picture: 1. End cover; 2. Outer shell; 3. Mounting plate; 4. Oil outlet pipe; 5. Oil inlet pipe; 6. Heating element; 7. Stator; 8. Main shaft; 9. Sealing plate; 10. Gear; 11. Pressurized oil chamber; 12. Circuit board; 13. Flow channel control mechanism; 131. Hemispherical airbag; 132. Moving ring block; 133. Adjustable spiral plate; 134. Hook; 135. Lever; 136. Inner shell; 137. Liquid outlet channel; 138. Branch inlet; 139. Branch outlet; 1310. Bimetallic strip; 1311. Support rod; 1312. Connecting plate; 1313. First blocking piece; 14. Positioning mechanism; 141. Positioning bolt; 142. Fixed ring block; 143. Fixed spiral plate; 144. Rubber ring; 145. Second blocking piece; 15. Controller; 16. Rotor. DETAILED DESCRIPTION

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1 to 11 As shown, the present invention provides an electronic oil pump brushless motor, including an end cover 1, the end cover 1 is fixedly connected to a housing 2 by bolts, a mounting plate 3 is fixedly connected to the side of the housing 2 away from the end cover 1, a sealing plate 9 is fixedly connected to the inner cavity of the end cover 1, a pressurized oil chamber 11 is defined in the middle of the sealing plate 9, a gear 10 is rotatably connected to the middle of the inner cavity of the sealing plate 9, and further comprising: A flow channel regulating mechanism 13, the flow channel regulating mechanism 13 is connected to the housing 2; The positioning mechanism 14 is connected to the flow channel regulating mechanism 13; The flow channel regulating mechanism 13 includes an adjustable spiral plate 133 . After heating, the adjustable spiral plate 133 generates displacement by bending and deforming the metal, thereby regulating the size of the oil flow channel.

[0022] Adopting the above solution: annular plugs are provided at the ends of the housing 2 and the mounting plate 3, and are located at the edge of the cavity between the housing 2 and the mounting plate 3, for maintaining the sealing of the cavity and further preventing oil leakage.

[0023] like Figures 1 to 5 As shown, the main shaft 8 is fixed to the middle of the sealing plate 9, and the main shaft 8 rotates through the middle of the sealing plate 9 and extends to the middle inner cavity of the outer shell 2. The outer wall of the main shaft 8 is fixed to the rotor 16, and the outer wall of the rotor 16 is provided with a stator 7, and the outer wall of the rotor 16 is fixed to the inner cavity of the inner shell 136. The side of the sealing plate 9 away from the main shaft 8 is fixed to the circuit board 12; the mounting plate 3 and the lower end of the outer shell 2 are jointly fixed with the heating element 6, and the outer wall of the heating element 6 is fixed with the controller 15, and the upper end of the heating element 6 is symmetrically fixed with the oil outlet pipe 4 and the oil inlet pipe 5, and the oil outlet pipe 4 is connected to the boost oil chamber 11 through the liquid outlet channel 137, and the branch inlet 138 and the branch outlet 139 are connected to the liquid outlet channel 137.

[0024] The above solution is adopted: when the motor is running, the gear 10 rotates and pressurizes the boost oil chamber 11, so that the oil in the boost oil chamber 11 continuously enters from the oil inlet pipe 5 and is discharged from the oil outlet pipe 4 to pump oil. The heating element 6 is mainly composed of a heating rod, a mounting cover and a heating element. It is used to melt the oil through the heating rod in a low temperature environment to prevent it from solidifying. A one-way valve is provided in both the branch inlet 138 and the branch outlet 139, and the liquid flow direction in the one-way valve is as follows: Figure 2 and Figure 9 As shown by the arrow. The oil inlet pipe 5 is connected to the pressurized oil chamber 11 through the liquid inlet channel, and the liquid inlet channel flows in the same direction as shown in FIG. Figure 2 The directions indicated by the arrow lines are opposite. The liquid inlet channel and the liquid outlet channel 137 are symmetrically arranged at the bottom opening of the pressurized oil chamber 11, so that the gear 10 can discharge the oil in time after pressurization.

[0025] It is worth noting that the rotational pressurization of the gear 10 in the pressurized oil chamber 11 can be similar to the pressurization principle of a gear pump, which is an existing mature technology and will not be described in detail here.

[0026] like Figure 7 and Figure 8 As shown, the flow channel regulating mechanism 13 also includes an inner shell 136, and the outer wall of the inner shell 136 is slidably connected to a movable ring block 132 near the opening, and a pair of hooks 134 are fixed to one side of the movable ring block 132, and the other side of the movable ring block 132 is fixed to the end of the adjustable spiral plate 133, and the side walls of the outer shell 2 are respectively provided with a branch inlet 138 and a branch outlet 139; the two side edges of the adjustable spiral plate 133 are respectively slidably connected between the outer shell 2 and the inner shell 136 through leak-proof strips, and the end of the adjustable spiral plate 133 away from the movable ring block 132 is fixed with a first blocking piece 1313, and the edge of the outer shell 2 is fixedly connected to at least one hemispherical air bag 131.

[0027] like Figure 8 and Figure 9 As shown, the middle part of the movable ring block 132 is rotatably connected to a connecting plate 1312, the side of the connecting plate 1312 away from the movable ring block 132 is rotatably connected to a lever 135, one-fifth of the edge of the lever 135 is rotatably connected to a support rod 1311, and the side of the lever 135 away from the connecting plate 1312 is rotatably connected to a bimetallic strip 1310.

[0028] The above solution utilizes a bimetallic strip 1310, which is a laminate of two metals with different thermal expansion coefficients. This strip bends when the temperature changes, amplifying the deformation through a lever to directly move the heat sink. The bimetallic strip 1310 can be made of Invar alloy plus copper. Invar alloy has a stable thermal expansion coefficient of approximately 1.5×10 -6 / ℃, short-term temperature resistance can reach 290℃, which can match the high temperature environment of automobile oil pumps. After special process treatment, such as annealing and solution treatment, it can withstand tens of thousands of temperature cycles without performance degradation. The copper layer provides good thermal conductivity, while the surface of the Invar alloy can be nickel-plated for corrosion protection and adapt to the oil environment. The bimetallic strip 1310 is arranged in contact with the surface of the inner shell 136 so that heat can be transferred to the bimetallic strip 1310 in the first time to cause it to deform. The bimetallic strip 1310, the lever 135 and the connecting plate 1312 are all close to one side of the flow channel and do not hinder the normal oil inflow of the flow channel. The lever ratio is designed to range from 3:1 to 5:1. The typical deformation rate of the bimetallic strip 1310 is a bending of several microns to tens of microns per degree Celsius temperature difference. For example, if a displacement of 2.5 mm is required, the lever ratio is equal to the target displacement divided by the deformation of the bimetallic strip, which is approximately 5:1.

[0029] like Figures 7 to 9 As shown, the positioning mechanism 14 includes a fixed spiral plate 143 abutting between the outer shell 2 and the inner shell 136, and the bimetallic strip 1310 and the support rod 1311 are fixed to the end of the fixed spiral plate 143 at one end away from the lever 135; the end of the fixed spiral plate 143 is fixed with a second blocking piece 145, and the second blocking piece 145 is slidably engaged with the inner cavity of the movable ring block 132 through a slot; the end of the fixed spiral plate 143 away from the movable ring block 132 is fixed with the fixed ring block 142, and the first blocking piece 1313 is slidably engaged with the inner cavity of the fixed ring block 142 through a slot.

[0030] like Figure 4 、 Figure 5 and Figure 11As shown, the tops of the fixed ring block 142 and the movable ring block 132 are both slidably connected to the inner cavity of the outer shell 2 through limiting slides, and thread grooves are symmetrically provided on both sides of the fixed ring block 142 and the outer shell 2, and the two sides are threadedly connected to each other through a pair of positioning bolts 141, and the inner cavity of the fixed ring block 142 is abutted against the inner shell 136 through a rubber ring 144.

[0031] With this solution, the rubber ring 144 can compensate for the gap created during installation of the fixed ring block 142. After long-term use, the leak-proof strips of the adjustable spiral plate 133 may wear out and age, causing oil leakage. However, this leakage will be confined to the outer shell 2 and the inner shell 136, and will not affect sensitive internal components such as the stator 7 and rotor 16.

[0032] It is worth noting that both the fixed spiral plate 143 and the adjustable spiral plate 133 can be made of lightweight materials. The specific materials can be selected conventionally and will not be described in detail here.

[0033] The working principle and use process of the present invention: First, when the brushless motor of the oil pump is running, the stator 7 and the rotor 16 drive the main shaft 8 to rotate, driving the gear 10 to rotate at high speed. The gear 10 rotates and pressurizes the boost oil chamber 11, so that the oil in the boost oil chamber 11 continuously enters from the oil inlet pipe 5 and is then discharged from the oil outlet pipe 4, achieving the effect of pumping oil. During this process, the oil in the outlet channel 137 enters the heat dissipation channel between the outer shell 2 and the inner shell 136 through the one-way valve when passing through the branch inlet 138. The oil flows in a spiral and continuously absorbs the heat emitted by the stator 7 and the rotor 16, maintaining the stable operation of the motor. The oil finally flows out from the one-way valve of the branch outlet 139 and re-enters the outlet channel 137 for discharge together. This cyclic operation effectively absorbs the working heat of the motor, and the channel is completely isolated from the stator 7 to prevent leakage.

[0034] Secondly, since the initial flow channel is narrow, e.g. Figure 7The contact area between the oil and the inner shell 136 shown is about half of the area of the stator 7 and the rotor 16, so the heat dissipation effect is relatively low, which is suitable for the initial stage of motor operation or when high-speed oil pumping is not required. When the motor is running continuously or the oil is pumped at high speed, the stator 7 and the rotor 16 generate a lot of heat, and the surface temperature of the inner shell 136 rises, causing the bimetallic strip 1310 to be quickly heated and deformed, and the support rod 1311 is used to rotate the lever 135. The longitudinal displacement caused by the rotation of the lever 135 can be compensated by the connecting plate 1312. The lever 135 drives the connecting plate 1312, and then pulls the movable ring block 132 to produce axial displacement. After the movable ring block 132 moves, it can drive the adjustable spiral plate 133 to move synchronously, so that the adjustable spiral plate 133 and the fixed spiral plate 143 are close to each other. The distance between the two is mainly determined by the real-time temperature of the motor. If the temperature is very high, the adjustable spiral plate 133 and the fixed spiral plate 143 fit together to open the flow channel of the oil to the maximum, such as Figure 8 As shown, it basically occupies the entire area where the stator 7 and rotor 16 are located, achieving efficient cooling. In addition, the flow rate of the oil in the flow channel is positively correlated with the rotation speed of the gear 10. In other words, when high-speed oil pumping is required, the rotation speed of the gear 10 will increase, and the heat generated by the stator 7 and rotor 16 will also increase. At this time, the curvature of the bimetallic strip 1310 will also increase, and the flow rate of the oil in the flow channel will also increase, which can accelerate heat dissipation. In this way, when high heat generation occurs, heat dissipation can be automatically accelerated, thereby ensuring that the temperature of the motor is appropriate and conducive to long-term use. Again, if the temperature rise range of the motor is small, the curvature of the bimetallic strip 1310 will be correspondingly small. At this time, there will be a uniform hollow space in the middle of the spiral flow channel, and the motor can be cooled appropriately. Under the action of the leak-proof strips on both sides of the adjustable spiral plate 133, it is ensured that there will be basically no oil leakage during its movement and adjustment process. At the same time, since the movement of the movable ring block 132 and the adjustable spiral plate 133 is a movement with good sealing performance, in order to ensure that it is not affected by the resistance of air pressure, at least one set of hemispherical airbags 131 can be provided to adjust the air pressure balance of the cavity between the outer shell 2 and the inner shell 136. When the movable ring block 132 moves axially in the direction close to the hemispherical airbag 131, the gas in the cavity is squeezed into the hemispherical airbag 131, and the air intake volume of the hemispherical airbag 131 increases. On the contrary, when the movable ring block 132 moves axially in a direction away from the hemispherical airbag 131, the gas in the hemispherical airbag 131 is sucked into the cavity again, and the hemispherical airbag 131 absorbs and shrinks; Finally, after long-term use, the leak-proof strip of the adjustable spiral plate 133 may wear out and age, causing oil leakage, or when other parts malfunction, the flow channel control mechanism 13 needs to be disassembled and maintained. First, loosen the bolts of the outer shell 2 and the end cover 1 to separate the two, then loosen the pair of positioning bolts 141, and then remove the annular plug used for sealing. Then, use an external hook rod-like tool to hook the hook ring 134 and remove the movable ring block 132 and the fixed ring block 142, as well as the parts between the two. At this time, the cavity between the outer shell 2 and the inner shell 136 can be cleaned, and the removed parts can be maintained and replaced. Finally, the operation can be reversed, and the limiting slides on the side walls of the movable ring block 132 and the fixed ring block 142 can be accurately reset to complete the installation. In this way, the heat dissipation device can be effectively maintained and the service life of the brushless motor can be increased.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0036] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electronic oil pump brushless motor, comprising an end cover (1), wherein the end cover (1) is fixedly connected to a housing (2) by bolts, a mounting plate (3) is fixedly connected to a side of the housing (2) away from the end cover (1), a sealing plate (9) is fixedly connected to the inner cavity of the end cover (1), a pressurized oil cavity (11) is defined in the middle of the sealing plate (9), and a gear (10) is rotatably connected to the middle of the inner cavity of the sealing plate (9), characterized in that: Also includes: a flow channel regulating mechanism (13), wherein the flow channel regulating mechanism (13) is connected to the housing (2); A positioning mechanism (14), wherein the positioning mechanism (14) is connected to the flow channel regulating mechanism (13); The flow channel regulating mechanism (13) includes an adjustable spiral plate (133). After heating, the adjustable spiral plate (133) generates a displacement by bending the deformed metal, thereby regulating the size of the oil flow channel.

2. The electronic oil pump brushless motor according to claim 1, characterized in that: The flow channel regulating mechanism (13) further comprises an inner shell (136), the outer wall of the inner shell (136) being slidably connected to a movable ring block (132) near the opening, one side of the movable ring block (132) being fixedly connected to a pair of hook rings (134), and the other side of the movable ring block (132) being fixedly connected to the end of the adjustable spiral plate (133), and the side walls of the outer shell (2) being respectively provided with a branch inlet (138) and a branch outlet (139).

3. The electronic oil pump brushless motor according to claim 2, characterized in that: The edges of both sides of the adjustable spiral plate (133) are slidably connected between the outer shell (2) and the inner shell (136) via leak-proof strips. One end of the adjustable spiral plate (133) away from the movable ring block (132) is fixedly connected to a first blocking piece (1313). The edge of the outer shell (2) is fixedly connected to at least one hemispherical air bag (131).

4. The electronic oil pump brushless motor according to claim 3, characterized in that: The middle of the movable ring block (132) is rotatably connected to a connecting plate (1312), the side of the connecting plate (1312) away from the movable ring block (132) is rotatably connected to a lever (135), one-fifth of the edge of the lever (135) is rotatably connected to a support rod (1311), and the side of the lever (135) away from the connecting plate (1312) is rotatably connected to a bimetallic strip (1310).

5. The electronic oil pump brushless motor according to claim 4, characterized in that: The positioning mechanism (14) comprises a fixed spiral plate (143) abutting between the outer shell (2) and the inner shell (136), and the bimetallic strip (1310) and the end of the support rod (1311) away from the lever (135) are both fixed to the end of the fixed spiral plate (143).

6. The electronic oil pump brushless motor according to claim 5, characterized in that: A second blocking piece (145) is fixed to the end of the fixed spiral plate (143), and the second blocking piece (145) is slidably engaged with the inner cavity of the movable ring block (132) through a clamping groove.

7. The electronic oil pump brushless motor according to claim 6, characterized in that: One end of the fixed spiral plate (143) away from the movable ring block (132) is fixedly connected to the fixed ring block (142), and the first blocking piece (1313) is slidably engaged with the inner cavity of the fixed ring block (142) through a card slot.

8. The electronic oil pump brushless motor according to claim 7, characterized in that: The tops of the fixed ring block (142) and the movable ring block (132) are both slidably connected to the inner cavity of the outer shell (2) via a limiting slide bar. Threaded grooves are symmetrically provided on both sides of the fixed ring block (142) and the outer shell (2), and the two sides are threadedly connected to each other via a pair of positioning bolts (141). The inner cavity of the fixed ring block (142) abuts against the inner shell (136) via a rubber ring (144).

9. The electronic oil pump brushless motor according to claim 8, characterized in that: A main shaft (8) is fixedly connected to the middle of the sealing plate (9), and the main shaft (8) rotates through the middle of the sealing plate (9) and extends to the middle inner cavity of the outer shell (2). A rotor (16) is fixedly connected to the outer wall of the main shaft (8), and a stator (7) is provided on the outer wall of the rotor (16). The outer wall of the rotor (16) is fixedly connected to the inner cavity of the inner shell (136). A circuit board (12) is fixedly connected to the side of the sealing plate (9) away from the main shaft (8).

10. The brushless motor for an electronic oil pump according to claim 9, characterized in that: The mounting plate (3) and the lower end of the housing (2) are fixedly connected to a heating element (6), the outer wall of the heating element (6) is fixedly connected to a controller (15), and the upper end of the heating element (6) is symmetrically fixedly connected to an oil outlet pipe (4) and an oil inlet pipe (5), the oil outlet pipe (4) is connected to the pressurized oil chamber (11) through a liquid outlet channel (137), and the branch inlet (138) and the branch outlet (139) are connected to the liquid outlet channel (137).

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