Oil pump motor

Abstract

The invention discloses an oil pump motor which comprises a shell which is arranged in a hollow cylinder shape. The isolation plate is arranged in the machine shell, and an inner cavity of the machine shell is divided into two sets of installation cavities through the isolation plate; the stator is arranged in the mounting cavity in the front side of the machine shell, and an inner cavity of the stator is rotationally connected with a rotor; the front side sealing piece is mounted at the opening part of the mounting cavity in the front side of the machine shell and is used for sealing the opening part of the mounting cavity; the control piece is mounted in the mounting cavity on the rear side of the machine shell; through the arrangement of the isolation plate, the front side sealing piece and the rear side sealing piece, the isolation plate divides the inner cavity of the machine shell into two groups of mounting cavities, so that the stator, the rotor and the control piece can be physically isolated, and heat, vibration, oil stains and the like generated when the power assembly works can be prevented from interfering the control piece; meanwhile, the control part is prevented from being influenced by external environment, and working stability is improved.

Description

Technical Field

[0001] This invention relates to the field of oil pump motor technology, specifically to an oil pump motor. Background Technology

[0002] The hydraulic pump is one of the core power sources of a vehicle's tailgate hydraulic system. It typically includes a pump motor and a pump assembly. The pump assembly mainly includes an oil chamber, etc. The core function of the pump motor is to convert electrical energy into mechanical energy, which then drives the pump to generate hydraulic pressure, ultimately providing power for the lifting and tilting of the tailgate. It is a crucial bridge connecting the vehicle's power supply and the hydraulic system.

[0003] Currently, Chinese patent CN219268592U discloses a housing of an oil pump motor, an oil pump motor, and an oil pump. The housing of the oil pump motor is a hollow cylinder with a housing base at one end and an open mounting port at the other end. On the outer side of the housing, there are a first flange and a second flange arranged circumferentially along the housing axis. Both the first flange and the second flange are used to set mounting holes for the housing. The first flange is close to the mounting port and is set along the outer edge of the mounting port. The first flange has multiple lugs distributed circumferentially. A first type of screw through hole is provided at the center of each lug. The first type of screw through hole is used to install the manifold ring of the oil pump motor and the rear end cover. The manifold ring is used to fix the control board of the oil pump motor. The rear end cover has multiple through holes. The first type of screw through hole and the multiple through holes on the rear end cover are in the same position and size.

[0004] The aforementioned oil pump motor housing has some problems during use. The power component generates continuous heat when working, which is easily conducted to the control board, causing temperature drift, parameter deviation, or even component burnout due to high temperature. In addition, the power component requires lubricating grease, which is easily volatilized or leaked onto the surface of the control components, contaminating the circuit and causing short circuits and poor contact.

[0005] Furthermore, in the application scenario of tailgate hydraulic pump motors, the current mainstream solutions also have more prominent pain points: brushed motors have the problem of short lifespan, and the carbon brushes need to be replaced frequently after wear, resulting in high maintenance costs; they are noisy during operation, which seriously affects the working environment; they have low energy conversion efficiency, and the battery drains quickly and the range is insufficient when used frequently. This problem is particularly significant in scenarios with high-frequency loading of goods, often leading to work interruptions; at the same time, although some similar brushless motors on the market avoid some of the defects of brushed motors, they still have key performance bottlenecks: insufficient power output, which makes it difficult to meet the heavy-load operation requirements of tailgates; and they require a large current when starting, making it difficult to start under low temperature or heavy load conditions, and unable to stably adapt to complex working environments. Summary of the Invention

[0006] The purpose of this invention is to provide an oil pump motor to solve the problems mentioned in the background art, which are that the power components generate continuous heat during operation, the heat is easily conducted to the control board, causing temperature drift and parameter deviation of the control board, and even burning of components due to high temperature. In addition, the power components require lubricating grease, which is easy to evaporate or leak onto the surface of the control components, contaminating the circuit and causing short circuits and poor contact.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An oil pump motor includes a housing, which is a hollow cylindrical shape; an isolation plate disposed inside the housing, dividing the inner cavity of the housing into two sets of mounting cavities; a stator disposed in the front mounting cavity of the housing, with a rotor rotatably connected to the inner cavity of the stator; a front seal installed on the front mounting cavity opening of the housing and used to seal the opening; a control component installed in the rear mounting cavity of the housing; a rear seal installed on the rear side of the housing, used to seal the rear mounting cavity opening to protect the control component inside the cavity; and a connector disposed at the bottom of the housing, with the output end of the connector electrically connected to the control component.

[0008] The stator adopts a modular structure design, formed by splicing modular iron cores, which significantly reduces magnetic circuit losses, improves motor energy conversion efficiency, ensures that the motor power output meets the heavy-duty operation requirements of the tailgate, and achieves a larger slot fill factor, resulting in higher motor power density, saving materials, and reducing motor weight. The control unit integrates a sensor control module, which accurately collects the motor rotor position signal through sensor control, reducing the starting current required and significantly improving the starting success rate under low temperature and heavy load conditions. At the same time, the MOSFETs in the control unit adopt a two-sided heat dissipation design, with the MOSFETs attached to the heat dissipation areas on both sides of the control board. Combined with the ventilation structure of the rear mounting cavity, it achieves bidirectional and efficient heat dissipation, solving the problem of controller failure due to overheating. In addition, the motor adopts a brushless structure design, replacing the traditional brushed motor, fundamentally solving the defects of short life, high noise, and low efficiency of brushed motors, reducing battery energy consumption during frequent use, and meeting the endurance requirements of high-frequency cargo loading scenarios.

[0009] As a preferred technical solution, the front sealing element includes a front cover disposed on the front side of the housing. The outer periphery of the front cover has multiple sets of through holes. Each set of through holes has a fixing screw inserted into its inner cavity. Each set of fixing screws passes through the corresponding side through hole and is threaded to the outer surface of the housing.

[0010] As a preferred technical solution, the rear sealing element includes a rear cover disposed on the rear side of the housing, and a plurality of fastening bolts are inserted into the surface of the rear cover. The ends of the fastening bolts penetrate the rear cover and are threaded to the surface of the housing.

[0011] As a preferred technical solution, bearings are respectively fitted on the front and rear shaft surfaces of the rotor. The surface of the front cover has a fixing tube with the outer diameter of the fixing tube gradually decreasing from front to back. The front shaft of the rotor is inserted into the fixing tube and the bearing fitted on its surface is embedded in the rear opening of the fixing tube. The bearing located at the rear end is embedded in the rear surface of the front mounting cavity. The inner diameter of the rear opening of the fixing tube is adapted to the outer diameter of the bearing outer ring to achieve the embedding and fixing of the bearing.

[0012] As a preferred technical solution, a wave ring is provided on the rear shaft surface of the rotor, one side of the wave ring abuts against the bearing surface located on the rear side, and the other side of the wave ring abuts against the rear surface of the front mounting cavity.

[0013] As a preferred technical solution, the control component includes a control board disposed inside the rear mounting cavity, and the output end of the control board is electrically connected to the winding input end of the stator via a wire.

[0014] As a preferred technical solution, the wiring component includes two sets of insulating posts embedded in the bottom of the housing. A connecting bolt is inserted into the inner cavity of the two sets of insulating posts. The end of the connecting bolt is threaded downward through the corresponding side insulating post and extends to the lower part of the housing. A connecting wire is connected to the top of the connecting bolt, and the other end of the connecting wire is connected to the input end of the control board.

[0015] As a preferred technical solution, insulating washers are fitted onto the surfaces of the two sets of connecting bolts located at the bottom of the housing.

[0016] As a preferred technical solution, a sealing ring is provided at the front end of the rear cover, and the outer surface of the sealing ring is adapted to the inner surface of the rear mounting cavity.

[0017] As a preferred technical solution, both the insulating column and the insulating washer are made of polytetrafluoroethylene.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, through the setting of an isolation plate and front and rear seals, divides the inner cavity of the housing into two sets of mounting cavities. This achieves physical isolation between the stator, rotor, and control components, preventing heat, vibration, oil contamination, and other factors generated during the operation of the power components from interfering with the control components. It also prevents the control components from being affected by the external environment, improving operational stability. Furthermore, the front and rear seals respectively seal the openings of the front and rear mounting cavities, effectively preventing external dust, moisture, and impurities from entering the cavities, protecting the core components such as the stator, rotor, and control components, and extending the service life of the components.

[0019] 2. Addressing the core pain points of tailgate oil pump motors, this invention replaces traditional brushed motors with a brushless structure, completely resolving the issues of short lifespan, high noise, and low efficiency associated with brushed motors. It also reduces battery power consumption, meeting the endurance requirements of high-frequency cargo loading scenarios. Through a stator modular structure design, motor efficiency and power output are significantly improved, adapting to heavy-duty tailgate operations and achieving a higher slot fill factor, resulting in greater motor power density, material savings, and reduced motor weight. The sensor-controlled module reduces starting current and improves low-temperature start-up success rate. A dual-sided MOSFET heat dissipation design solves the controller overheating and failure problem, comprehensively addressing the performance shortcomings of existing solutions.

[0020] 3. By setting fastening bolts, multiple sets of screws are evenly distributed along the outer periphery of the front cover, which can achieve a firm connection between the front cover and the machine housing, preventing the front cover from loosening due to equipment vibration and ensuring the sealing stability of the front mounting cavity. In addition, the fixing screws pass through the through holes of the front cover and are threaded to the machine housing, making disassembly and assembly simple. When inspecting the stator and rotor in the front mounting cavity, only the fixing screws need to be removed to open the front cover, reducing maintenance difficulty and improving operation and maintenance efficiency.

[0021] 4. This invention, through the installation of bearings, converts the rotor's sliding friction into rolling friction by fitting bearings on the front and rear shafts. This significantly reduces rotational resistance, improves rotor rotation efficiency, reduces wear on the shafts and other components, and extends the rotor's service life. Furthermore, the outer diameter of the fixing tube on the front cover gradually decreases from front to back, facilitating the insertion and assembly of the rotor's front shaft. The design of the rear opening of the fixing tube and the bearing's outer ring ensures precise positioning of the front bearing, preventing bearing displacement. The rear bearing is embedded in the rear surface of the front mounting cavity and cooperates with the bearing positioned by the front fixing tube, ensuring the rotor's coaxiality, preventing eccentric vibration during rotor rotation, improving the stability of equipment operation, and reducing noise and component wear caused by vibration. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the oil pump motor of the present invention; Figure 2 This is an exploded structural diagram of the oil pump motor of the present invention; Figure 3 This is a schematic diagram of the structure of the front cover of the present invention; Figure 4 This is a schematic diagram of the installation position of the insulating plate of the present invention; Figure 5 This is a schematic diagram of the structure of the back cover of the present invention.

[0023] In the diagram: 100, housing; 101, stator; 102, rotor; 103, wave coil; 104, front cover; 105, fixing screw; 106, isolation plate; 107, mounting cavity; 108, fixing tube; 109, through hole; 200. Connecting wire; 201. Insulating post; 202. Insulating washer; 203. Connecting bolt; 300. Control panel; 400. Fastening bolts; 401. Rear cover; 402. Sealing ring. Detailed Implementation

[0024] 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, and 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.

[0025] Please see Figure 1-5This embodiment provides an oil pump motor, including a housing 100, which is a hollow cylindrical shape; an isolation plate 106 disposed inside the housing 100, dividing the inner cavity of the housing 100 into two sets of mounting cavities 107; a stator 101 disposed in the front mounting cavity 107 of the housing 100, with a rotor 102 rotatably connected to the inner cavity of the stator 101; a front seal installed at the opening of the front mounting cavity 107 of the housing 100 and used to seal the opening; a control component installed in the rear mounting cavity 107 of the housing 100; and a rear seal installed at the rear of the housing 100, used to seal the opening of the rear mounting cavity 107, thereby sealing the cavity. The internal control components are protected; the wiring component is located at the bottom of the housing 100, and its output end is electrically connected to the control components. Through the setting of the isolation plate 106 and the front and rear seals, the isolation plate 106 divides the inner cavity of the housing 100 into two sets of mounting cavities 107, so that the stator 101, rotor 102 and control components can be physically isolated. This can prevent the heat, vibration, oil and other factors generated during the operation of the power components from interfering with the control components, and at the same time prevent the control components from being affected by the external environment, thus improving the working stability. In addition, the front and rear seals seal the openings of the front and rear mounting cavities 107 respectively, which can effectively block external dust, water vapor and impurities from entering the cavity, protect the core components such as the stator 101, rotor 102 and control components, and extend the service life of the components.

[0026] The stator 101 adopts a modular structure design, which is formed by splicing multiple sets of arc-shaped iron core blocks to form a complete stator core. The blocks are fixed by laser welding. Compared with the traditional integral stator, the modular structure improves the winding slot fill factor and increases the motor power density by 15-20%, ensuring that the power output meets the requirements of heavy-duty tailboard operation (maximum load ≥ 3 tons). The control board 300 in the control components integrates a sensor control module. The sensor control module collects the real-time position signal of the rotor 102 through Hall sensors and feeds it back to the main control chip of the control board 300. The main control chip adjusts the energizing sequence of the stator 101 winding according to the position signal, so that the motor starting current is reduced to 60%-70% of that of traditional brushless motors, and the starting success rate is increased to over 98% under low temperature (-20℃ to -10℃) conditions. Meanwhile, the MOSFET 301 on the control board 300 adopts a dual-sided heat dissipation design. Copper heat sinks 302 are attached to both sides of the MOSFET 301. The heat sinks 302 are attached to the inner wall of the rear mounting cavity 107 through thermally conductive silicone to achieve heat dissipation. The controller operating temperature is reduced by 30℃-40℃, completely solving the problem of controller failure caused by overheating. In addition, the motor adopts a brushless structure, eliminating the carbon brushes and commutator of the traditional brushed motor. The service life is extended to 8000-10000 hours (the service life of the traditional brushed motor is 2000-3000 hours), the operating noise is reduced to below 60 decibels (the noise of the traditional brushed motor is ≥75 decibels), and the energy efficiency is increased to more than 85%. Under the same battery capacity, the endurance during high-frequency loading operations is extended by more than 50%.

[0027] The front sealing component includes a front cover 104 located on the front side of the housing 100. The outer periphery of the front cover 104 has multiple sets of through holes 109. Each set of through holes 109 has a fixing screw 105 inserted into its inner cavity. Each set of fixing screws 105 passes through the corresponding side through hole 109 and is threaded to the outer surface of the housing 100. With the setting of fastening bolts 400, the multiple sets of screws are evenly distributed along the outer periphery of the front cover 104, which can achieve a firm connection between the front cover 104 and the housing 100, preventing the front cover 104 from loosening due to equipment vibration and ensuring the sealing stability of the front mounting cavity 107. Furthermore, the fixing screws 105 pass through the through holes 109 of the front cover 104 and are threaded to the housing 100, making disassembly and assembly simple. When inspecting the stator 101 and rotor 102 in the front mounting cavity 107, only the fixing screws 105 need to be removed to open the front cover 104, reducing maintenance difficulty and improving operation and maintenance efficiency.

[0028] The rear sealing component includes a rear cover 401 located on the rear side of the housing 100. Several sets of fastening bolts 400 are inserted into the surface of the rear cover 401. The ends of the fastening bolts 400 penetrate the rear cover 401 and are threaded to the surface of the housing 100. Through the fastening bolts 400, the bolt threads connect the housing 100 and the rear cover 401, resulting in a high connection strength. This effectively resists external impacts or equipment vibrations, prevents the rear cover 401 from loosening, ensures the sealing effect of the rear mounting cavity 107, and protects the internal control components. Furthermore, the fastening bolts 400 are easy to install and remove. When inspecting the control components, the fastening bolts 400 can be quickly removed to open the rear cover 401 without complicated tools, reducing maintenance time. The fastening bolts 400 have excellent tightening properties and are not prone to sealing failure during long-term use, thus improving the durability of the rear seal.

[0029] Bearings are fitted onto the front and rear shaft surfaces of the rotor 102. The front cover 104 has a fixing tube 108 whose outer diameter gradually decreases from front to rear. The front shaft of the rotor 102 is inserted into the fixing tube 108, and the bearing fitted onto its surface is embedded in the rear opening of the fixing tube 108. The rear bearing is embedded in the rear surface of the front mounting cavity 107. The inner diameter of the rear opening of the fixing tube 108 matches the outer diameter of the bearing's outer ring to achieve bearing embedding and fixation. By installing bearings on the front and rear shafts of the rotor 102, the sliding friction of the rotor 102 can be converted into rolling friction, significantly reducing rotational resistance and improving rotational speed. The rotation efficiency of rotor 102 is improved, while reducing wear on the shaft and other components, extending the service life of rotor 102. Furthermore, the outer diameter of the fixing tube 108 of the front cover 104 gradually decreases from front to back, which facilitates the insertion and assembly of the front shaft of rotor 102. The design of the fitting between the rear opening of the fixing tube 108 and the outer ring of the bearing enables precise positioning of the front bearing, preventing bearing displacement. The rear bearing is embedded in the rear surface of the front mounting cavity 107 and cooperates with the bearing positioned by the front fixing tube 108 to ensure the coaxiality of rotor 102, prevent eccentric vibration when rotor 102 rotates, improve the stability of equipment operation, and reduce noise and component wear caused by vibration.

[0030] The rotor 102 has a wave ring 103 on its rear shaft surface. One side of the wave ring 103 abuts against the bearing surface located on the rear side, and the other side of the wave ring 103 abuts against the rear surface of the front mounting cavity 107. By setting the wave ring 103, one side of the wave ring 103 on the rear shaft of the rotor 102 abuts against the rear bearing, and the other side abuts against the rear surface of the front mounting cavity 107, a continuous elastic preload can be applied to the rear bearing, eliminating the assembly clearance and running clearance inside the bearing, and reducing the clearance during bearing operation.

[0031] The control components include a control board 300 located inside the rear mounting cavity 107. The output end of the control board 300 is electrically connected to the winding input end of the stator 101 via a wire. By setting the control components, the control board 300 is located in the rear mounting cavity 107. Relying on the isolation effect of the insulating plate 106, the heat, electromagnetic interference, oil stains, etc. generated during the operation of the front stator 101 and rotor 102 can be avoided from affecting the control board 300, ensuring the circuit stability of the control board 300. Furthermore, the output end of the control board 300 is directly connected to the winding input end of the stator 101 via a wire, resulting in a short signal transmission path, which can reduce the loss of control signals and external interference, improve the control accuracy of the stator 101 winding, and thus ensure the stability of the equipment's power output, achieving precise control of parameters such as the speed and torque of the rotor 102.

[0032] The wiring component includes two sets of insulating posts 201 embedded in the bottom of the housing 100. Connecting bolts 203 are inserted into the inner cavity of the two sets of insulating posts 201. The ends of the connecting bolts 203 are threaded downward through the corresponding insulating posts 201 and extend to the lower part of the housing 100. A connecting wire 200 is connected to the top of the connecting bolts 203. The other end of the connecting wire 200 is connected to the input terminal of the control board 300. Through the wiring component, the insulating posts 201 can achieve electrical isolation between the connecting bolts 203 and the housing 100, preventing leakage caused by the bolts and the housing 100 conducting electricity, and ensuring the electrical safety of the equipment. In addition, the connecting bolts 203 extend downward through the insulating posts 201 to the lower part of the housing 100, which facilitates the connection of external cables to the bolts. The bottom layout does not occupy the front and rear maintenance space and the wiring operation is convenient.

[0033] Among them, the two sets of connecting bolts 203 located at the lower part of the housing 100 are fitted with insulating washers 202. By setting the insulating washers 202, the connecting bolts 203 at the lower part of the housing 100 are fitted with insulating washers 202, which can form secondary insulation between the connecting bolts 203 and external wiring components, further enhancing the electrical insulation effect, preventing leakage hazards caused by contact between bolts and external metal parts, and improving the overall electrical safety of the equipment. At the same time, the insulating washers 202 can also play a buffering role, reducing the squeezing and wear on the bottom of the housing 100 or external parts when the bolts are tightened, and increasing the friction between the bolts and the parts, preventing the bolts from loosening due to equipment vibration, and enhancing the connection stability.

[0034] The rear cover 401 is provided with a sealing ring 402 at its front end. The outer surface of the sealing ring 402 is adapted to the inner surface of the rear mounting cavity 107. With the sealing ring 402, the outer surface of the sealing ring 402 at the front end of the rear cover 401 is adapted to the inner surface of the rear mounting cavity 107, which can fill the tiny gap between the rear cover 401 and the inner wall of the rear mounting cavity 107, greatly improving the sealing level of the rear mounting cavity 107 and effectively preventing external dust, water vapor, oil and other impurities from entering the cavity.

[0035] Both the insulating post 201 and the insulating washer 202 are made of polytetrafluoroethylene (PTFE). PTFE has excellent electrical insulation properties, which can fully meet the insulation requirements of the insulating post 201 and the insulating washer 202, effectively blocking current conduction, avoiding leakage risks, and ensuring electrical safety. In addition, PTFE is resistant to high and low temperatures, chemical corrosion, and aging, and can adapt to different working environments. It is not prone to deformation, cracking, or degradation of insulation performance after long-term use, which improves the durability of the insulating post 201 and the insulating washer 202. At the same time, the stability of PTFE can ensure that the insulating components can function for a long time, reduce equipment failures caused by damage to the insulating components, extend the overall service life of the equipment, and reduce maintenance costs.

[0036] Working principle; The hollow cylindrical housing 100 serves as the main support frame. Inside the housing 100, two independent mounting cavities 107 are formed by the partition plate 106. The front mounting cavity 107 is used to assemble the core power components (stator 101, rotor 102), and the rear mounting cavity 107 is used to assemble the control components (control board 300, etc.), which can avoid mutual interference between different functional components. The opening of the front mounting cavity 107 is sealed by the front sealing element. During installation, the fixing screws 105 are inserted into the through holes 109 on the outer circumference of the front cover 104, and then the fixing screws 105 are threaded through the through holes 109 and connected to the outer surface of the housing 100. Through the fastening action of the fixing screws 105, the front cover 104 is tightly fitted to the front side of the housing 100, thereby sealing the front mounting cavity 107. The opening of the rear mounting cavity 107 is sealed by a rear seal to protect the internal control components. The core of the rear seal is the rear cover 401. During installation, the fastening bolt 400 is inserted into the surface of the rear cover 401, so that the end of the fastening bolt 400 passes through the rear cover 401 and is threaded to the surface of the housing 100, thereby fixing the rear cover 401 to the housing 100. At the same time, the outer surface of the sealing ring 402 at the front end of the rear cover 401 is adapted to the inner surface of the rear mounting cavity 107. The sealing ring 402 can fill the gap between the rear cover 401 and the housing 100. The sealing ring 402 is made of thermally conductive silicone, which has good thermal conductivity. It can ensure heat dissipation while preventing dust from entering, further improving the sealing and heat dissipation effect of the rear mounting cavity 107 and providing a good protective environment for the control components. The stator 101 inside the front mounting cavity 107 adopts a modular structure, which is assembled from multiple sets of arc-shaped iron core blocks to reduce magnetic circuit loss and improve motor efficiency. The rotor 102 is rotatably connected to the inner cavity of the stator 101. Bearings are respectively fitted on the shafts at both ends of the rotor 102 to reduce the frictional resistance when the rotor 102 rotates. The outer diameter of the fixing tube 108 on the surface of the front cover 104 gradually decreases from front to back. The front shaft of the rotor 102 is inserted into the fixing tube 108, and the bearing fitted on the surface of the front shaft is embedded in the rear opening of the fixing tube 108. The rear bearing is embedded in the rear surface of the front mounting cavity 107. At the same time, the inner diameter of the rear opening of the fixing tube 108 is matched with the outer ring of the bearing to ensure stable fixing of the bearing, thereby providing reliable rotational support for the rotor 102 and ensuring that the rotor 102 rotates smoothly under the action of the stator 101. One side of the bell ring 103 on the rear shaft surface of the rotor 102 abuts against the rear bearing surface, and the other side abuts against the rear surface of the front mounting cavity 107. The bell ring 103 can position the bearing through its own elasticity to prevent the bearing from loosening or shifting during the operation of the rotor 102, and at the same time play a certain buffering role. The control board 300, located in the rear mounting cavity 107, integrates a sensor-controlled module and a dual-sided heat dissipation structure for the MOSFETs: the sensor-controlled module collects the position signal of the rotor 102 through a Hall sensor and feeds it back to the main control chip to adjust the energizing sequence of the stator 101 winding, reducing the starting current and improving the success rate of low-temperature starting; copper heat sinks 302 are attached to both sides of the MOSFETs 301, and the heat sinks 302 are in contact with the inner wall of the rear mounting cavity 107, which, together with the ventilation holes of the rear cover 401, achieves efficient heat dissipation and avoids controller overheating failure; the output end of the control board 300 is directly connected to the input end of the stator 101 winding through wires to achieve precise control of motor speed and torque; Two sets of insulating posts 201 are embedded in the bottom of the housing 100. Connecting bolts 203 are inserted into the inner cavity of the insulating posts 201. The ends of the connecting bolts 203 penetrate downward through the corresponding side insulating posts 201 and extend to the lower part of the housing 100 for connection to external power supply lines. The other end of the connecting wire 200 connected to the top of the connecting bolts 203 is connected to the input terminal of the control board 300. External power can be transmitted to the control board 300 through the connecting bolts 203 and the connecting wire 200 to provide power for the operation of the control board 300 and the subsequent stator 101. Meanwhile, an insulating washer 202 is fitted on the surface of the connecting bolt 203 at the bottom of the housing 100, and both the insulating post 201 and the insulating washer 202 are made of polytetrafluoroethylene. Polytetrafluoroethylene has good insulation properties, which can effectively prevent leakage between the connecting bolt 203 and the housing 100 or external parts, and ensure the electrical safety of the equipment. In addition, the motor adopts a brushless structure, eliminating carbon brushes and commutators, which solves the problems of short life, high noise and low efficiency of traditional brushed motors, reduces battery energy consumption, meets the endurance requirements of high-frequency cargo loading scenarios, and is fully adapted to complex operating environments such as heavy tail load and low temperature start-up, in conjunction with stator modular structure, sensor control and MOSFET heat dissipation design.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An oil pump motor, characterized in that, include: The housing (100) is a hollow cylindrical shape; The partition plate (106) is disposed inside the housing (100), and the inner cavity of the housing (100) is divided into two sets of mounting cavities (107) by the partition plate (106). Stator (101), the stator (101) is disposed in the front mounting cavity (107) of the housing (100), and the rotor (102) is rotatably connected to the inner cavity of the stator (101). A front seal is installed at the opening of the mounting cavity (107) on the front side of the housing (100) and is used to seal the opening thereon. A control component, which is installed in the rear mounting cavity (107) of the housing (100); A rear sealing element is installed on the rear side of the housing (100) and is used to seal the opening of the rear mounting cavity (107) to protect the control components inside the cavity. A connector is provided at the bottom of the housing (100), and the output end of the connector is electrically connected to the control unit.

2. The oil pump motor according to claim 1, characterized in that: The front sealing element includes a front cover (104) disposed on the front side of the housing (100). The outer peripheral surface of the front cover (104) has multiple sets of through holes (109). Each set of through holes (109) has a fixing screw (105) inserted into its inner cavity. Each set of fixing screws (105) passes through the corresponding side through hole (109) and is threaded to the outer surface of the housing (100).

3. The oil pump motor according to claim 2, characterized in that: The rear sealing element includes a rear cover (401) disposed on the rear side of the housing (100). Several sets of fastening bolts (400) are inserted into the surface of the rear cover (401). The ends of the fastening bolts (400) penetrate the rear cover (401) and are threaded to the surface of the housing (100).

4. The oil pump motor according to claim 2, characterized in that: Bearings are respectively fitted on the front and rear shaft surfaces of the rotor (102). The surface of the front cover (104) has a fixing tube (108). The outer diameter of the fixing tube (108) gradually decreases from front to back. The front shaft of the rotor (102) is inserted into the fixing tube (108) and the bearing fitted on its surface is embedded in the rear opening of the fixing tube (108). The bearing located at the rear end is embedded in the rear surface of the front mounting cavity (107). The inner diameter of the rear opening of the fixing tube (108) is adapted to the outer diameter of the outer ring of the bearing to achieve the embedding and fixing of the bearing.

5. An oil pump motor according to claim 1, characterized in that: A wave ring (103) is provided on the rear shaft surface of the rotor (102). One side of the wave ring (103) abuts against the bearing surface located on the rear side, and the other side of the wave ring (103) abuts against the rear surface of the front mounting cavity (107).

6. The oil pump motor according to claim 1, characterized in that: The control component includes a control board (300) disposed inside the rear mounting cavity (107), the output end of the control board (300) being electrically connected to the winding input end of the stator (101) via a wire.

7. An oil pump motor according to claim 6, characterized in that: The wiring component includes two sets of insulating posts (201) embedded in the bottom of the housing (100). The inner cavity of the two sets of insulating posts (201) is fitted with connecting bolts (203). The end of the connecting bolt (203) is threaded downward through the corresponding side insulating post (201) and extends to the lower part of the housing (100). The top of the connecting bolt (203) is connected to a connecting wire (200). The other end of the connecting wire (200) is connected to the input end of the control board (300).

8. An oil pump motor according to claim 7, characterized in that: Insulating washers (202) are fitted on the surfaces of the two sets of connecting bolts (203) located at the lower part of the housing (100).

9. An oil pump motor according to claim 3, characterized in that: A sealing ring (402) is provided at the front end of the rear cover (401), and the outer surface of the sealing ring (402) is adapted to the inner surface of the rear mounting cavity (107).

10. An oil pump motor according to claim 8, characterized in that: The insulating post (201) and the insulating washer (202) are both made of polytetrafluoroethylene.

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