Dual source motor pump

Abstract

The application discloses a dual-source motor pump, which comprises a motor body, a steering oil pump and a shell arranged outside the steering oil pump, and the steering oil pump and the shell are fixed on the motor body; a containing cavity is arranged between the shell and the steering oil pump, the containing cavity is communicated with the inside of the steering oil pump, and the oil in the steering oil pump can enter the containing cavity. The shell and the containing cavity can effectively expand the heat dissipation area of the oil circulation in the steering oil pump, which is beneficial to reducing the system oil temperature of the dual-source motor pump. Meanwhile, the oil in the containing cavity can also absorb part of the vibration during the operation of the motor body, so that a good vehicle driving environment is provided, and the service life of the dual-source motor pump is prolonged.

Description

Technical Field

[0001] This invention relates to the field of automotive equipment technology, and more particularly to a dual-source motor pump. Background Technology

[0002] As new energy electric vehicles continue to develop, higher requirements are being placed on the safety and reliability of the entire vehicle.

[0003] Currently, the dual-source motor pumps in the steering systems of new energy vehicles on the market operate in a dual-source mode, meaning the dual-source motor has two sets of windings: high-voltage and low-voltage. In normal mode, the high-voltage winding of the dual-source motor operates, providing steering power to the vehicle. The high-voltage winding is connected to the vehicle's power battery, while the low-voltage winding is connected to the low-voltage battery. When the vehicle's high-voltage system malfunctions and cannot provide power steering, the low-voltage power supply is activated to provide short-term emergency power steering.

[0004] Dual-source motor pumps are also used to supply oil to some systems in the vehicle, such as the front axle hydraulic system. However, existing dual-source motor pumps have the following problems during use:

[0005] 1) The dual-source motor pump is quite noisy when under load, and the noise is sharp and harsh, making it unacceptable to the subjective evaluation of the vehicle.

[0006] 2) When the power supply is reversed during vehicle installation and use, it may cause some wiring harnesses or control chips in the vehicle to burn out.

[0007] 3) During vehicle operation, some fault alarms may occur, affecting the use of the vehicle. Summary of the Invention

[0008] To address one of the aforementioned technical problems, the present invention provides a dual-source motor pump.

[0009] This invention provides a dual-source motor pump, comprising:

[0010] The motor body, the steering pump, and the housing disposed outside the steering pump, wherein the steering pump and the housing are fixed to the motor body;

[0011] There is a receiving cavity between the housing and the steering pump, and the receiving cavity is in communication with the interior of the steering pump, so that the oil in the steering pump can enter the receiving cavity.

[0012] The aforementioned dual-source motor pump may also have the following characteristics: the outer casing includes an inner wall surface and an outer wall surface, and at least one sound insulation gap layer is provided between the inner wall surface and the outer wall surface.

[0013] The aforementioned dual-source motor pump may also have the following characteristics: the sound insulation gap layer is filled with air; or,

[0014] The sound insulation gap layer is in a vacuum state; or

[0015] The sound insulation gap layer is filled with sound insulation material; or

[0016] The sound insulation gap layer is filled with nitrogen or inert gas.

[0017] The aforementioned dual-source motor pump may also have the following characteristics: the housing includes a housing oil inlet and a housing oil outlet, the steering oil pump includes an oil pump inlet and an oil pump outlet, the housing oil inlet is connected to the oil pump inlet, and the housing oil outlet is connected to the oil pump outlet.

[0018] The outer casing also includes an oil return port, which is connected to an external oil reservoir.

[0019] The aforementioned dual-source motor pump may also have the following characteristics: the outer casing is provided with an outer casing mounting hole, and the mounting hole is connected to the motor body through a connector.

[0020] The aforementioned dual-source motor pump may also have the following characteristics: the material of the outer casing includes non-metallic materials.

[0021] The dual-source motor pump described above may also have the following characteristics: the dual-source motor pump further includes a low-voltage controller, the motor body includes a low-voltage steering winding, the low-voltage controller is connected to the power supply terminal and the low-voltage steering winding respectively, and the low-voltage controller includes a cut-off module, which is used to cut off the electrical energy coupled by the low-voltage steering winding when the high-voltage steering winding is running.

[0022] The aforementioned dual-source motor pump may also have the following characteristics: the low-pressure controller further includes a cut-off control module, which is communicatively connected to the cut-off module, and the cut-off module includes a cut-off circuit; wherein, the low-pressure controller is used to issue a control signal, and the cut-off control module receives the control signal and instructs the cut-off circuit to be disconnected or connected.

[0023] The aforementioned dual-source motor pump may also have the following characteristics: the cut-off circuit includes a cut-off unit, which includes an NMOS transistor or a relay.

[0024] The aforementioned dual-source motor pump may also have the following characteristics: the cut-off circuit further includes a Zener diode, a first resistor, and a second resistor;

[0025] The NMOS transistor includes a source, a gate, and a drain;

[0026] The source electrode is electrically connected to the positive terminal of the power supply terminal, the anode of the Zener diode, and one end of the first resistor, respectively.

[0027] The gate is electrically connected to the cathode of the Zener diode, the other end of the first resistor, and one end of the second resistor, respectively.

[0028] The drain is electrically connected to the low-voltage steering winding;

[0029] The other end of the second resistor is communicatively connected to the cutoff control module.

[0030] The dual-source motor pump of the present invention can effectively expand the heat dissipation area during oil circulation in the power steering pump by utilizing the outer shell and the accommodating cavity, which is beneficial to reducing the system oil temperature of the dual-source motor pump. At the same time, the oil in the accommodating cavity can also absorb some of the vibration of the motor body during operation, thereby providing a good vehicle driving environment and improving the service life of the dual-source motor pump.

[0031] Other features and advantages of the invention will become clear when reading the following description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements. The drawings described below are some embodiments of the invention, but not all embodiments. Other drawings will be readily available to those skilled in the art based on these drawings without any inventive effort.

[0033] Figure 1 This is a schematic diagram of the dual-source motor pump in the embodiment;

[0034] Figure 2 This is a cross-sectional view of the housing of the dual-source motor pump in the embodiment;

[0035] Figure 3 This is a schematic diagram of the motor body of the dual-source motor pump in the embodiment;

[0036] Figure 4 This is a schematic diagram of the cutoff circuit in the dual-source motor pump in the embodiment;

[0037] Figure 5 This is a circuit diagram of the cut-off unit in the dual-source motor pump in the embodiment.

[0038] Figure label:

[0039] 1. Motor body; 2. Steering oil pump; 3. Housing; 4. Receptacle cavity; 5. Low-voltage controller; 6. Power supply terminal; 7. High-voltage controller; 11. Low-voltage steering winding; 12. High-voltage steering winding; 31. Inner wall surface; 32. Outer wall surface; 33. Sound insulation gap layer; 34. Housing oil inlet; 35. Housing oil outlet; 36. Oil return port; 37. Housing mounting hole; 51. Cut-off module; 52. Cut-off control module; 53. Cut-off circuit; 311. Annular plate; 312. First plate; 313. Second plate; 331. First gap; 332. Second gap; 531. Cut-off unit; 532. Zener diode; 533. First resistor; 534. Second resistor;

[0040] A. Control circuit; N1. Source; N2. Gate; N3. Drain; P. Control signal. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0042] This invention aims to increase the heat dissipation area of ​​the steering oil pump during operation, reduce the system oil temperature of the dual-source motor pump, and allow the oil in the containment cavity to absorb some of the vibration of the motor body during operation, thereby avoiding sharp and piercing noise, improving the vehicle driving environment, and extending the service life of the dual-source motor pump.

[0043] The dual-source motor pump provided in this disclosure will now be described in detail with reference to the accompanying drawings.

[0044] like Figure 1 As shown, the dual-source motor pump includes a motor body 1, a steering oil pump 2, and a housing 3 disposed outside the steering oil pump 2.

[0045] The power steering pump 2 is fixed to the motor body 1. The power steering pump 2 can be fixed to the motor body 1 via a connector, such as a fixing bolt. The input shaft end of the power steering pump 2 is connected to the output shaft end of the motor body 1, so that the motor body 1 drives the power steering pump 2 to rotate. A metal sealing ring or oil seal can be provided between the power steering pump 2 and the motor body 1 to ensure the sealing performance between them.

[0046] The outer casing 3 can be fixed to the motor body 1 using connectors, which may include fixing bolts, etc. (See reference...) Figure 1 and Figure 2 The housing 3 has an internal structure forming an installation space, within which the power steering pump 2 is located, thus forming a receiving cavity 4 between the housing 3 and the power steering pump 2. This receiving cavity 4 is connected to the interior of the power steering pump 2, allowing the power steering pump 2 to enter into the receiving cavity 4, thereby enabling power steering pump 2 to circulate within the receiving cavity 4 and increasing the path for power steering pump 2 to circulate.

[0047] In this embodiment, the accommodating cavity increases the path of oil circulation in the steering pump, and the side wall of the housing expands the heat dissipation area of ​​the oil circulation, which can reduce the system oil temperature when the dual-source motor pump is in operation. At the same time, the oil in the accommodating cavity can also absorb some of the vibration of the motor body during operation, thereby providing a good vehicle driving environment and improving the service life of the dual-source motor pump.

[0048] In some embodiments, such as Figure 2 As shown, the outer casing 3 includes an inner wall surface 31 and an outer wall surface 32. The outer wall surface 32 can be the outermost wall of the outer casing 3. A predetermined distance is spaced between the outer wall surface 32 and the inner wall surface 31, thereby forming a sound insulation gap layer 33 between them. The sound insulation gap layer 33 has at least one layer; for example, it can have two, three, or more layers.

[0049] Existing dual-source motor pumps generate sharp, piercing noise during operation, such as in working or loaded states, especially when loaded. This noise makes the vehicle's overall performance unacceptable to drivers. In this embodiment, at least one insulating gap layer 33 enhances the sound insulation of the housing 3, effectively preventing vibrations from the motor body 1 that are not absorbed by the oil in the accommodating cavity 4 from being transmitted to the outside when loaded. Simultaneously, the sound insulation gap layer 33, in conjunction with the accommodating cavity 4, optimizes the sharp, piercing noise, reduces high-frequency noise, and eliminates the harsh sound, thereby solving the problem and providing a better driving environment and improved driver comfort.

[0050] In one example, the inner wall surface 31 may include an annular plate 311, a first plate 312, and a second plate 313. The first plate 312 and the second plate 313 are used to close the two ends of the annular plate 311 along the extension direction of the output shaft end of the electrode body 1. The first plate 312 is provided with a mounting end face 314 for connecting with the motor body 1. The second plate 313 is disposed opposite to the first plate 312 and is located away from the motor body 1.

[0051] The outer wall of the annular plate 311 (i.e., the side facing the outer wall surface) and the outer wall of the first plate 312 (the side facing the outer wall surface) together with the outer wall surface 32 form a sound insulation gap layer 33, wherein the sound insulation gap layer 33 may include a first gap 331 and a second gap 332. (Refer to...) Figure 2 As shown, the distance between the outer wall of the second plate 313 and its outer wall surface 32 is defined as the second gap 332; the distance between the outer wall of the first plate 312 and its outer wall surface 32, and the distance between the outer wall of the annular plate 311 and its outer wall surface 32 are defined as the first gap 331. The width of the first gap 331 is different from the width of the second gap 332 along the direction parallel to the output axis of the motor body 1. The width of the gap between the first gap 331 and the second gap 332 ranges from 1 to 4 mm. For example, in one specific embodiment, the widths of the first gap 331 and the second gap 332 are the same, and both gap widths are 2 mm.

[0052] When the motor body 1 is in normal or loaded state, the vibration noise emitted by the motor body 1 spreads in all directions. During installation, the radial direction of the outer casing 3 is generally open, and noise not absorbed by the oil in the accommodating cavity 4 will be transmitted radially to the outside of the outer casing 3. Therefore, increasing the width of the radial gap (i.e., part of the first gap) of the outer casing 3 reduces the transmission of noise in the radial direction. The accommodating cavity 4 is located on one side of the motor body 1, abutting or fixedly connected to it. To reduce the impact of noise on the electrode body 1, the width of the gap (i.e., part of the first gap) between the outer casing 3 and the motor body 1 also needs to be increased. Since the noise from the motor body 1 towards the outer casing 3 is absorbed by the oil in the accommodating cavity 4, less noise can escape in that direction. Therefore, the width of the gap on the side of the outer casing 3 away from the motor body 1 (i.e., the second gap) can be reduced. Thus, in one example, the width of the second gap 332 is smaller than the width of the first gap 331.

[0053] Of course, the width of the second gap 332 can also be greater than the width of the first gap 331, or the width of the second gap 332 can be equal to the width of the first gap 331.

[0054] Reference Figure 2 As shown, in some embodiments, air can be filled in the sound insulation gap layer 33 to absorb some of the noise generated when the motor body 1 is running, and effectively reduce the transmission of noise, thereby improving the sound insulation and noise reduction effect of the housing 3.

[0055] Alternatively, the sound insulation gap layer 33 can be evacuated, creating a vacuum state within it. This vacuum-sealed sound insulation gap layer 33, in conjunction with the circulation channel within the accommodating cavity 4, optimizes the sharp, piercing noise generated by the dual-source motor pump during operation or loading, thus addressing the issue of sharp, piercing noise from an auditory perspective and improving driver comfort.

[0056] Alternatively, sound-insulating materials, such as sound-insulating cotton or rock wool, can be filled into the sound insulation gap layer 33. These materials can be used to improve the noise reduction effect of the outer shell 3.

[0057] Alternatively, nitrogen or an inert gas can be filled into the sound insulation gap layer 33. The inert gas can include, but is not limited to, helium, neon, argon, and radon. It can also be a mixture of multiple gases, or other gases that are chemically inert at room temperature and moderate temperatures, such as nitrogen, which can be used as the sound insulation filling material. The moderate temperature range can be understood as between 60 and 120°C.

[0058] Reference Figure 2 As shown, in some embodiments, the outer casing 3 includes an oil inlet 34 and an oil outlet 35. The oil inlet 34 is located on the top surface of the outer casing 3. The oil outlet 35 is located on the side wall of the outer casing 3, and there is a height difference between the oil outlet 35 and the oil inlet 34 to facilitate oil circulation in the oil circulation channel subsequently formed within the outer casing 3. One end of the oil outlet 35 passes through the sound insulation gap layer 33 and extends into the receiving cavity 4.

[0059] The power steering pump 2 includes a pump inlet (not shown in the figure) and a pump outlet (not shown in the figure). The housing inlet 34 is connected to the pump inlet, and the housing outlet 35 is connected to the pump outlet, forming a circulation channel for power steering fluid circulation. When the power steering pump 2 fluid circulates in this channel, the heat dissipation area is effectively increased, thereby reducing the oil temperature in the circulation system. Simultaneously, the fluid in the circulation channel can absorb some of the vibration generated by the dual-source motor pump, thus optimizing the sharp, harsh noise caused by the vibration, reducing high-frequency noise, and improving driver comfort.

[0060] The outer casing 3 also includes an oil return port 36, which is connected to an external oil reservoir (not shown in the figure). The oil return port 36 is located at the top of the outer side wall of the outer wall surface 32.

[0061] It should be noted that the oil inlet 34, the oil outlet 35, and the steering pump 2 are all sealed with seals (such as metal seals or oil seals).

[0062] like Figure 2As shown, in some embodiments, the housing 3 is provided with a housing mounting hole 37. The housing mounting hole 37 has a flange end face. When installing the housing 3, after the mounting hole 37 passes through the output shaft of the electrode body 1, the flange end face fits against the flange face of the steering pump 2. Then, the steering pump 2 and the housing 3 are mounted on the flange face of the motor body 1 using bolts or other fasteners. The housing mounting hole 37 allows for quick and convenient installation of the dual-source motor pump, and also facilitates the maintenance and repair of the dual-source motor pump.

[0063] like Figure 2 As shown, in some embodiments, the material of the outer shell 3 may include, but is not limited to, non-metallic materials, such as nylon and resin. The outer shell 3 includes an outer wall surface 32 and an inner wall surface 31, wherein the material of the outer wall surface 32 may be the same as the material of the inner wall surface 31, or the material of the outer wall surface 32 may be different from the material of the inner wall surface 31.

[0064] In this embodiment, the material of the outer wall surface 32 is the same as the material of the inner wall surface 31, so as to reduce the manufacturing difficulty and production cost of the outer shell 3.

[0065] like Figure 3 As shown, in some embodiments, the motor body 1 includes a low-voltage steering winding 11, and a high-voltage steering winding 12 is also provided inside the motor body 1 to achieve dual-source control. The operation of the high-voltage steering winding 12 is controlled by a high-voltage controller 7. It should be noted that the control logic operation of the high-voltage controller 7 can utilize existing technology. The high-voltage steering winding 12 and the low-voltage steering winding 11 are spaced apart, with the high-voltage steering winding 12 being the main winding, used to provide steering assistance when the vehicle is in normal driving mode. When the vehicle is in normal driving mode, the low-voltage steering winding 11 operates in a low-power output state or is in a standby state. When the high-voltage steering winding 12 malfunctions, the low-voltage steering winding 11 intervenes and provides short-term emergency steering assistance to bring the disabled vehicle to a safe position, effectively ensuring the safety of the driver.

[0066] Reference Figure 3 As shown, the dual-source motor pump in this embodiment also includes a low-voltage controller 5. The low-voltage controller 5 is connected to the power supply terminal 6 and the low-voltage steering winding 11 respectively. The low-voltage controller 5 includes a cutoff module 51, which is used to cut off the electrical energy coupled by the low-voltage steering winding 11 when the high-voltage steering winding 12 is running, and also plays a certain role in preventing reverse connection of the circuit, thereby improving the service life of the dual-source motor pump.

[0067] It should be noted that the power supply terminal 6 includes a power supply module, which comprises a high-voltage power supply module, a low-voltage power supply module, and a main power supply module. The high-voltage power supply module provides power to the high-voltage steering winding 12, the low-voltage power supply module provides power to the low-voltage steering winding 11, and the main power supply module provides power to other equipment in the dual-source motor pump. The power supply module may include, but is not limited to, a storage battery, a lead-acid battery, or a lithium battery. A charging module may also be included in the power supply module to charge it via an external power cord, thereby improving the service life and efficiency of the dual-source motor pump.

[0068] like Figure 4 As shown, in some embodiments, the low-voltage controller 5 further includes a cutoff control module 52. The cutoff control module 52 is communicatively connected to the cutoff module 51. A cutoff circuit 53 is provided within the cutoff module 51. The low-voltage controller 5 sends a control signal P, and the cutoff control module 52 receives the control signal P and instructs the cutoff circuit 53 to open or close.

[0069] The cut-off circuit 53 is electrically connected to the control circuit A of the motor body 1. The control circuit A is used to control the low-voltage steering winding 11 and / or the high-voltage steering winding 12. That is, the control circuit A of the motor body 1 can be connected downstream of the cut-off circuit 53 and used as a load of the cut-off circuit 53. The cut-off circuit 53 can be set in the positive or negative line of the control circuit A of the motor body 1.

[0070] In this application, the cut-off circuit 53 in the cut-off module 51 can effectively prevent the charging energy generated by the low-voltage steering winding 11 from coupling when the high-voltage steering winding 12 is running. At the same time, it can also act as a reverse connection protection in the circuit, thereby preventing the problem of wire harness or control chip burning due to reverse power connection, improving the energy consumption utilization rate of the whole vehicle and the stability and safety of the vehicle during operation.

[0071] like Figure 5 As shown, the cutoff circuit 53 includes a cutoff unit 531, wherein the cutoff unit 531 includes an NMOS transistor or a relay.

[0072] The cutoff circuit 53 also includes a Zener diode 532, a first resistor 533, and a second resistor 534. The following description takes the cutoff unit 531 as an NMOS transistor as an example. The NMOS transistor includes a source N1, a gate N2, and a drain N3.

[0073] Continue to refer to Figure 5 The source N1 of the NMOS transistor is electrically connected to the positive terminal of the power supply terminal 6, the anode of the Zener diode 532, and one end of the first resistor 533.

[0074] The gate N2 of the NMOS transistor is electrically connected to the cathode of the Zener diode 532, the other end of the first resistor 533, and one end of the second resistor 534.

[0075] The drain N3 of the NMOS transistor is electrically connected to the low-voltage steering winding 12.

[0076] The other end of the second resistor 534 is communicatively connected to the cutoff control module 52. For example, the other end of the second resistor 534 is connected to the cutoff control module 52 via a communication line.

[0077] In this embodiment, the cutoff circuit 53 is a cutoff circuit based on the forward power supply of an NMOS transistor. The cutoff circuit 53 can prevent the high voltage generated by the downstream power device, such as the high voltage steering winding 12 during operation (including the working state and the loading state), from causing the power supply terminal 6 to break down or to reverse charge the power supply terminal 6.

[0078] When the dual-source motor pump is in standby mode, the high-voltage steering winding 12 in the motor body 1 operates, driving the steering oil pump 2 to work to meet normal steering needs. At this time, the low-voltage steering winding 11 will not open the cutoff circuit 53 (this is the normal operating condition of the vehicle). That is to say, when the control signal P issued by the low-voltage controller 5 is low, the output level of the cutoff control module 52 is relative to the level of the source N1 of the NMOS transistor. At this time, the NMOS transistor is in the cutoff state. Therefore, the downstream power devices will not affect the power supply terminal 6.

[0079] When an abnormal situation occurs during vehicle operation, in order to ensure the safety and stability of vehicle steering, the need to activate emergency steering is determined based on the motor speed. When the vehicle malfunctions and the motor speed drops to a preset value, for example, when the speed of the first rotor assembly in the high-voltage steering winding 12 drops from 1500 RPM (Revolutions Per Minute) to 800 RPM, the low-voltage controller 5 sends a control signal P. The cutoff control module 52, upon receiving the control signal P, instructs the NMOS transistor to turn on. At this time, the control signal P from the low-voltage controller 5 is at a high level. The voltage level of the gate N2 of the NMOS transistor, supplied to the output terminal of the cutoff control module 52, is 10-12 volts higher than the voltage level of the source N1 of the NMOS transistor. Therefore, the NMOS transistor is in the conducting state, and the power supply terminal 6 can supply power normally to the control circuit A of the motor body 1 and other downstream power devices. It should be noted that, to ensure the timeliness of emergency steering, the emergency response switching time of the dual-source motor pump in this application is less than 100ms.

[0080] In one example, the cutoff unit 531 can be a relay. It should be noted that controlling the relay's on / off state by adjusting the level of the control signal P issued by the low-voltage controller 5 can employ existing technology, which will not be elaborated here.

[0081] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that an article or device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such an article or device. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the article or device that includes said element.

[0082] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. The present invention has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications and substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A dual-source motor pump, characterized in that, It includes a motor body, a power steering pump, and a housing disposed outside the power steering pump, wherein the power steering pump and the housing are fixed to the motor body; There is a receiving cavity between the housing and the steering pump, the receiving cavity is in communication with the interior of the steering pump, and the oil in the steering pump can enter the receiving cavity; The outer casing includes an inner wall surface and an outer wall surface, and at least one sound insulation gap layer is provided between the inner wall surface and the outer wall surface; The sound insulation gap layer includes a first gap and a second gap. The radial gap of the outer shell is part of the first gap, the gap between the outer shell and the motor body is part of the first gap, and the gap on the side of the outer shell away from the motor body is the second gap. The width of the second gap is smaller than the width of the first gap. The dual-source motor pump also includes a low-voltage controller. The motor body includes a low-voltage steering winding. The low-voltage controller is connected to the power supply terminal and the low-voltage steering winding respectively. The low-voltage controller includes a cutoff module. The cutoff module is used to cut off the electrical energy coupled by the low-voltage steering winding and prevent reverse circuit connection when the high-voltage steering winding is running. The low-voltage controller further includes a cutoff control module, which is communicatively connected to the cutoff module. The cutoff module includes a cutoff circuit. The low-voltage controller is used to send control signals, and the cutoff control module receives the control signals and instructs the cutoff circuit to be disconnected or connected. The control circuit of the motor body is connected downstream of the cut-off circuit and is used as the load of the cut-off circuit.

2. The dual-source motor pump according to claim 1, characterized in that, The sound insulation gap layer is filled with air; or... The sound insulation gap layer is in a vacuum state; or The sound insulation gap layer is filled with sound insulation material; or The sound insulation gap layer is filled with nitrogen or inert gas.

3. The dual-source motor pump according to claim 1, characterized in that, The housing includes an oil inlet and an oil outlet, and the steering pump includes an oil pump inlet and an oil pump outlet. The housing oil inlet is connected to the oil pump inlet, and the housing oil outlet is connected to the oil pump outlet. The outer casing also includes an oil return port, which is connected to an external oil reservoir.

4. The dual-source motor pump according to claim 1, characterized in that, The housing is provided with housing mounting holes, which are connected to the motor body via connectors.

5. The dual-source motor pump according to claim 1, characterized in that, The material of the outer shell includes non-metallic materials.

6. The dual-source motor pump according to claim 1, characterized in that, The cutoff circuit includes a cutoff unit, which includes an NMOS transistor or a relay.

7. The dual-source motor pump according to claim 6, characterized in that, The cutoff circuit also includes a Zener diode, a first resistor, and a second resistor; The NMOS transistor includes a source, a gate, and a drain; The source electrode is electrically connected to the positive terminal of the power supply terminal, the anode of the Zener diode, and one end of the first resistor, respectively. The gate is electrically connected to the cathode of the Zener diode, the other end of the first resistor, and one end of the second resistor, respectively. The drain is electrically connected to the low-voltage steering winding; The other end of the second resistor is communicatively connected to the cutoff control module.

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