Electronic oil pump

Abstract

The invention relates to an electronic oil pump which comprises a shell, an electrical unit and an oil pump execution unit, the electrical unit and the oil pump execution unit are arranged in the shell, a separation assembly used for separating the electrical unit from the oil pump execution unit is further arranged in the shell, and the separation assembly comprises a separation piece and a bridging piece which penetrates through the separation piece and is formed with the separation piece in an embedded mode. One end of the bridging piece is connected with the oil pump execution unit, and the other end is connected with the electrical unit. According to the electronic oil pump, the bridging piece is embedded in the partition piece, the bridging terminal corresponding to the bridging piece can be arranged in the oil pump execution unit, the bridging terminal and the bridging terminal are in butt joint for electric conduction, the partition piece is made of plastic materials and can completely wrap the bridging piece, and the sealing effect is greatly improved through the mutual embedding arrangement mode of the bridging piece and the partition piece; and moreover, the high corrosion resistance effect is achieved, certain deformability can be achieved through connection of the bridging pieces made of the metal material, the requirement for assembly tolerance is low, and modular production can be conveniently conducted.

Description

Technical Field

[0001] The invention belongs to the technical field of oil pumps, and in particular relates to an electronic oil pump. Background Art

[0002] The engine's electronic oil pump is an oil pump driven by an electric motor, mainly composed of a motor, a controller and a pump body. It can adjust the output pressure and flow as needed to adapt to different working conditions. It has the advantages of high precision and low energy consumption, and is widely used in the fields of automobiles and engineering machinery.

[0003] Existing electronic oil pumps generally have an electrical chamber, a motor chamber and an oil pump chamber. In order to provide cooling for the motor chamber and lubricate the motor shaft, an oil inlet groove is generally provided in the high-pressure area of ​​the oil pump chamber, so that the high-pressure oil enters the motor chamber through the oil inlet groove for lubrication and cooling, and flows back in the low-pressure area of ​​the oil pump chamber. Wiring is required between the electrical chamber and the motor chamber to power the motor. The existing wiring method generally performs a sealed connection through a mating hole. For example, a patent application with application number 202310337929.2 discloses a platform-based electronic oil pump. This wiring method has high requirements on the tolerance of the mating part, and gaps are prone to appear under long-term erosion of the oil, causing a small amount of oil to enter the electrical chamber. Summary of the invention

[0004] The purpose of the present invention is to provide an electronic oil pump in order to solve the above-mentioned problem.

[0005] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0006] An electronic oil pump comprises a shell, an electrical unit arranged in the shell, and an oil pump actuator unit. A partition assembly for separating the electrical unit from the oil pump actuator unit is also provided in the shell. The partition assembly comprises a partition and a bridge member that penetrates the partition and is embedded with the partition. One end of the bridge member is connected to the oil pump actuator unit, and the other end is connected to the electrical unit.

[0007] As a further optimization scheme of the present invention, a glue storage groove is also provided on the surface of the separator around the bridging member. This scheme further provides a raised glue storage groove to enclose an area around the bridging member, and fills the area with solid glue, which can eliminate the gap problem caused by thermal expansion and contraction between the bridging member and the separator to a certain extent.

[0008] As a further optimization scheme of the present invention, the oil pump actuator unit includes a motor assembly and an oil pump mechanism arranged in a shell, the motor assembly includes a bridging terminal cooperating with the bridging piece, a card slot is provided on the surface of the bridging piece, and when the bridging piece is plugged into the bridging terminal, the edge of the card slot pierces the wire skin of the motor assembly for conduction, and the end of the bridging piece entering the cavity where the electrical unit is located is provided with a plurality of connecting parts connected to the electrical unit, and the bridging piece pierces the wire skin through the card slot for conduction. In this way, the bridging piece and the bridging terminal are conveniently connected, a large exposed area of ​​the wire is avoided, and it is beneficial to the insulation of the wire.

[0009] As a further optimization scheme of the present invention, the shell includes a main shell, an upper cover and a lower cover. By setting a split connection, modular production is convenient, and the main shell and the upper cover, as well as the main shell and the lower cover are fixedly connected by bolts.

[0010] As a further optimization scheme of the present invention, the electrical unit includes a control board, which is fixedly connected to the partition by rivets. The partition is arranged between the main shell and the upper cover, and a terminal block that passes through the shell is arranged on one side of the partition. The control board and the terminal block are connected through a terminal embedded in the partition. The partition is made of insulating plastic material, and it can be embedded with the terminal and the bridge piece, which helps to insulate and waterproof and facilitate modular production.

[0011] As a further optimization solution of the present invention, a waterproof breathable valve is provided on the upper cover, and the waterproof breathable valve adopts the existing technology and is used for ventilating the chamber where the electrical unit is located.

[0012] As a further optimization scheme of the present invention, the upper cover is fixedly connected to the main shell, and the partition is clamped in the middle. The two ends of the partition extend out cylindrical structures that respectively cooperate with the upper cover and the main shell, and the circumferential surface of the cooperation is provided with a sealing ring. The surface where the partition and the upper cover are pressed together is provided with a protrusion. Since the partition is fixed by the clamping of the upper cover and the main shell, high requirements are placed on the processing tolerance during processing, resulting in high costs. This scheme provides a protrusion, and when the upper cover is fixed between the main shell, the protrusion is flattened by the upper cover to achieve the purpose of interference fit. On the basis of low tolerance requirements, the partition is completely fixed to prevent axial movement.

[0013] As a further optimization scheme of the present invention, a motor chamber for accommodating a motor assembly and an oil pump chamber for accommodating an oil pump mechanism are provided in the main shell. The motor assembly also includes a motor stator, a motor rotor and a rotating shaft arranged in the motor chamber. The rotating shaft extends into the oil pump chamber, and the bridging terminal is arranged on the motor stator. This scheme is a common motor structure, and there is an interference fit between the rotating shaft and the motor rotor.

[0014] As a further optimization scheme of the present invention, the oil pump mechanism includes an oil pump outer gear ring arranged in the oil pump chamber and an oil pump inner gear connected to the rotating shaft. The oil pump outer gear ring and the rotating shaft are eccentrically arranged to form a high-pressure zone and a low-pressure zone in the oil pump chamber. The main shell is provided with an oil inlet groove connected to the high-pressure zone and the motor chamber, and an oil return port connected to the low-pressure zone and the motor chamber. The rotating shaft and the oil pump inner gear are interference fit. The oil pump mechanism of this scheme is an internal meshing gear pump. Through the rotation of the oil pump inner gear, two areas of dynamically changing volume are formed between it and the oil pump outer gear ring, forming a high-pressure zone and a low-pressure zone, and the oil is sucked / discharged. The oil inlet groove is connected to the high-pressure zone, and is lubricated through the fitting point of the rotating shaft and the main shell, and then enters the motor chamber to cool the motor chamber, and returns to the low-pressure zone from the oil return port after cooling.

[0015] As a further optimization scheme of the present invention, the oil pump chamber is surrounded by a main shell and a lower cover, and the lower cover is provided with an oil outlet connected to the high-pressure area and an oil inlet connected to the low-pressure area. This scheme further proposes a connection and cooperation method between the lower cover and the main shell, and the lower cover is also provided with a mounting hole for convenient connection with the engine structure.

[0016] The beneficial effects of the present invention are:

[0017] The present invention embeds the bridge piece in the separator, and a bridge terminal corresponding to the bridge piece can be arranged in the oil pump actuator unit, and the two are connected to conduct electricity. The separator is made of plastic material and can be completely covered on the bridge piece. The mutually embedded arrangement of the two greatly improves the sealing effect and has a high corrosion resistance effect. The connection through the metal bridge piece can have a certain deformation ability, and the requirement for assembly tolerance is low, which is convenient for modular production.

[0018] The product adopts welding-free electrical connection. The motor winding enameled wire is connected through the piercing terminal, and connected to the circuit board through the fisheye terminal. The two terminals are then connected through plug-in, which simplifies the production process, has a high pass rate and reliable products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 The present invention Figure 1 Exploded view of the structure;

[0021] Figure 3 is a top view of the present invention;

[0022] Figure 4 is a front cross-sectional view of the present invention;

[0023] Figure 5 It is a schematic diagram of the lower cover structure of the present invention;

[0024] Figure 6 The present invention Figure 5 Schematic diagram of the oil pump mechanism after the lower cover is removed;

[0025] Figure 7 The present invention Figure 6 The schematic diagram after further removing the internal gear of the oil pump;

[0026] Figure 8 It is a schematic diagram of the cooperation between the bridge member of the present invention and the motor stator;

[0027] Fig. 9 The present invention Figure 8 Schematic diagram of the connection between the structure and the separator;

[0028] Fig.10 is a schematic diagram of a bridge member of the present invention;

[0029] Fig.11 is a schematic diagram of a motor assembly of the present invention;

[0030] Fig.12 It is a schematic diagram of the connection of the two ends of the bridge member of the present invention;

[0031] In the figure: 1. Shell; 11. Main shell; 1101. Oil inlet groove; 1102. Oil return port; 12. Upper cover; 1201. Waterproof breathable valve; 13. Lower cover; 1301. Oil outlet; 1302. Oil inlet; 2. Motor assembly; 21. Motor stator; 22. Rotating shaft; 23. Bridge terminal; 24. Bridge member; 2401. Slot; 2402. Connecting part; 3. Oil pump mechanism; 31. Oil pump outer gear ring; 32. Oil pump inner gear; 4. Partition assembly; 41. Partition member; 42. Terminal block; 43. Glue storage tank; 44. Control board; 45. Terminal block; 46. Raised part. DETAILED DESCRIPTION

[0032] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0033] Example 1

[0034] like Figure 1-12As shown, an electronic oil pump includes a shell 1, an electrical unit and an oil pump actuator unit arranged in the shell 1. The shell 1 is also provided with a partition component 4 for separating the electrical unit from the oil pump actuator unit. The partition component 4 includes a partition 41 and a bridge member 24 that penetrates the partition 41 and is embedded with the partition 41. One end of the bridge member 24 is connected to the oil pump actuator unit, and the other end is connected to the electrical unit.

[0035] In this solution, by embedding the bridge member 24 in the separator 41, a bridge terminal 23 corresponding to the bridge member 24 can be set in the oil pump actuator unit, and the two are connected to conduct electricity. The separator 41 is made of plastic material and can be completely covered on the bridge member 24. The mutually embedded setting of the two greatly improves the sealing effect and has a high corrosion resistance effect. The connection through the metal bridge member 41 can have a certain deformation ability, has low requirements for assembly tolerance, and is convenient for modular production.

[0036] like Fig.11 As shown, the separator 41 is divided into three sections, namely, an upper section, a middle section, and a lower section, and an arc chamfer is arranged between each section. During installation, the chamfer has a certain bending space. Therefore, when the bridge member 24 is docked with the bridge terminal 23, even if there is a certain tolerance, it has a strong compatibility due to the existence of the chamfer, and the tolerance requirement for position processing is not high.

[0037] Furthermore, a glue storage groove 43 is provided on the surface of the partition 41 around the bridge member 24. The present solution further provides a raised glue storage groove 43 to enclose an area around the bridge member 24 and fills the area with solid glue, which can eliminate the gap problem caused by long-term thermal expansion and contraction between the bridge member 24 and the partition 41 to a certain extent.

[0038] The oil pump actuator unit includes a motor assembly 2 and an oil pump mechanism 3 arranged in the housing 1. The main housing 11 is provided with a motor chamber for accommodating the motor assembly 2 and an oil pump chamber for accommodating the oil pump mechanism 3. The motor assembly 2 includes a bridge terminal 23 that cooperates with the bridge member 24. The surface of the bridge member 24 is provided with a card slot 2401. When the bridge member 24 is plugged into the bridge terminal 23, the edge of the card slot 2401 pierces the wire skin of the motor assembly 2 for conduction. The end of the bridge member 24 that enters the chamber where the electrical unit is located is provided with a plurality of connecting parts 2402 connected to the electrical unit. In this way, the bridge member 24 is conveniently connected to the bridge terminal 23 to avoid the wires. The large exposed area is beneficial to the insulation of the wire. The connection part 2402 and the control board 44 are connected by interference fit or welding. The connection part 2402 can be specifically set as a fisheye terminal. The number of fisheye terminals depends on the power size. In this embodiment, three are set. Each bridge 24 has three fisheye terminals, which are connected to the control board 44. A hole is set on the bridge terminal 23. The wire of the motor is inserted into the bridge terminal 23. When the bridge 24 is inserted, the edge of the slot 2401 is used as a piercing terminal to pierce the wire skin for conduction. The number of piercing terminals on each bridge 24 increases or decreases according to the power size.

[0039] Furthermore, the housing 1 includes a main shell 11, an upper cover 12 and a lower cover 13. By setting a split connection, modular production is convenient. The main shell 11 and the upper cover 12, as well as the main shell 11 and the lower cover 13 are fixedly connected by bolts. The main shell 11 is provided with a motor chamber for accommodating the motor assembly 2 and an oil pump chamber for accommodating the oil pump mechanism 3.

[0040] The electrical unit includes a control panel 44, which is fixedly connected to a partition 41 by rivets. The partition 41 is arranged between the main shell 11 and the upper cover 12, and a terminal block 42 is arranged on one side of the partition 41 and passes through the shell 1. The control panel 44 and the terminal block 42 are connected via a terminal block 45 embedded in the partition 41. The partition 41 is made of insulating plastic material, and it can be embedded with the terminal block 45 and the bridge 24 to facilitate insulation and waterproofing and facilitate modular production. A waterproof breathable valve 1201 is arranged on the upper cover 12. The waterproof breathable valve 1201 adopts the existing technology and is used to ventilate the chamber where the electrical unit is located.

[0041] The upper cover 12 is fixedly connected to the main shell 11, and the partition 41 is clamped in the middle. The two ends of the partition 41 extend into cylindrical structures that respectively cooperate with the upper cover 12 and the main shell 11, and the circumferential surface of the cooperation is provided with a sealing ring. The surface where the partition 41 and the upper cover 12 are pressed together is provided with a protrusion 46. Since the partition 41 is fixed by the clamping of the upper cover 12 and the main shell 11, high requirements are placed on the processing tolerance during processing, resulting in high quality control costs. In this solution, the protrusion 46 is provided, and when the upper cover 12 is fixed to the main shell 11, the protrusion 46 is flattened by the upper cover 12 to achieve the purpose of interference fit. On the basis of low tolerance requirements, the partition 41 is completely fixed to prevent axial movement.

[0042] The motor assembly 2 includes a motor stator 21, a motor rotor and a rotating shaft 22 arranged in the main housing 11. The rotating shaft 22 extends into the oil pump chamber. The bridge terminal 23 is arranged on the motor stator 21. This scheme is a common motor structure. The rotating shaft 22 and the motor rotor are interference fit. In the motor stator 21, the wire passing method adopts the wire passing from the bottom of the motor stator 21, such as Fig.11 As shown, that is, the end away from the bridging terminal 23, the lower wire can reduce the length of the motor in terms of wiring, which is beneficial to saving space.

[0043] The oil pump mechanism 3 includes an oil pump outer gear ring 31 arranged in the oil pump chamber and an oil pump inner gear 32 connected to the rotating shaft 22. The oil pump outer gear ring 31 and the rotating shaft 22 are eccentrically arranged to form a high-pressure zone and a low-pressure zone in the oil pump chamber. An oil inlet groove 1101 connected to the high-pressure zone and the motor chamber and an oil return port 1102 connected to the low-pressure zone and the motor chamber are arranged on the main shell 11. The rotating shaft 22 and the oil pump inner gear 32 have an interference fit. The oil pump mechanism 3 of this scheme is an internal meshing gear pump. By rotating the oil pump inner gear 32, two areas of dynamically changing volume are formed between it and the oil pump outer gear ring 31, forming a high-pressure zone and a low-pressure zone, and the oil is discharged / sucked. The oil inlet groove 1101 is connected to the high-pressure zone and lubricated through the gap at the fitting point of the rotating shaft 22 and the main shell 11, and then enters the motor chamber from the gap to cool the motor chamber, and returns to the low-pressure zone from the oil return port 1102 after cooling.

[0044] The oil pump chamber is surrounded by the main shell 11 and the lower cover 13. The lower cover 13 is provided with an oil outlet 1301 connected to the high-pressure area and an oil inlet 1302 connected to the low-pressure area. The present scheme further proposes a connection and cooperation method between the lower cover 13 and the main shell 11. The lower cover 13 is also provided with a mounting hole for convenient connection with the engine structure.

[0045] The specific implementation method is as follows: This embodiment is a three-phase motor, and three bridge members 24 and bridge terminals 23 are provided. During operation, the wiring terminal 45 is electrically connected to the outside, so that the control board 44 supplies power to the motor assembly 2 through the three bridge members 24. The rotation of the motor assembly 2 drives the rotating shaft 22 to rotate, and the rotating shaft 22 drives the inner gear 32 of the oil pump to rotate, forming a high-pressure area and a low-pressure area between the outer gear ring 31 of the oil pump. The high-pressure area pumps the oil out from the oil outlet 1301, and pumps it into the matching gap between the main shell 11 and the rotating shaft 23 from the oil inlet groove 1101, and further enters the motor chamber from the gap, and enters the low-pressure area at the oil return port 1102. The low-pressure area also sucks external oil from the oil inlet 1302.

[0046] During production and installation, the bridge member 24 and the terminal 45 are then thermoplastically overmolded through the partition 41, the control board 44 is installed on the partition 41, and the bridge member 24 is fixed to the control board 44. First, the motor assembly 2 is installed, and then the partition 41 is placed in the main shell 11, the bridge member 24 is inserted into the bridge terminal 23, the wire sheath is pierced to conduct the wires, the upper cover 12 is installed, and the oil pump mechanism 3 can be installed according to the existing technology.

[0047] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An electronic oil pump, comprising a housing (1), an electrical unit arranged in the housing (1), and an oil pump actuator unit, characterized in that: A partition assembly (4) for separating the electrical unit and the oil pump actuator unit is also provided in the housing (1). The partition assembly (4) comprises a partition (41) and a bridge member (24) penetrating the partition (41) and embedded with the partition (41). One end of the bridge member (24) is connected to the oil pump actuator unit, and the other end is connected to the electrical unit.

2. An electronic oil pump according to claim 1, characterized in that: A glue storage groove (43) is also provided on the surface of the partition (41) around the bridge (24).

3. The electronic oil pump according to claim 1, characterized in that: The oil pump actuator unit comprises a motor assembly (2) and an oil pump mechanism (3) arranged in a housing (1); the motor assembly (2) comprises a bridging terminal (23) matched with a bridging member (24); a slot (2401) is provided on the surface of the bridging member (24); when the bridging member (24) and the bridging terminal (23) are plugged in, the edge of the slot (2401) pierces the wire skin of the motor assembly (2) to achieve conduction; and one end of the bridging member (24) that enters the chamber where the electrical unit is located is provided with a plurality of connecting parts (2402) connected to the electrical unit.

4. The electronic oil pump according to claim 3, characterized in that: The housing (1) comprises a main shell (11), an upper cover (12) and a lower cover (13).

5. The electronic oil pump according to claim 4, characterized in that: The electrical unit comprises a control panel (44), the control panel (44) being fixedly connected to a partition (41) by means of rivets, the partition (41) being arranged between the main housing (11) and the upper cover (12), and a wiring seat (42) penetrating through the housing (1) being arranged on one side of the partition (41), the control panel (44) and the wiring seat (42) being connected by means of a wiring terminal (45) embedded in the partition (41).

6. The electronic oil pump according to claim 5, characterized in that: The upper cover (12) is provided with a waterproof and breathable valve (1201).

7. The electronic oil pump according to claim 5, characterized in that: The upper cover (12) and the main shell (11) are fixedly connected, and the partition (41) is sandwiched in the middle. The two ends of the partition (41) extend into cylindrical structures that respectively cooperate with the upper cover (12) and the main shell (11), and a sealing ring is provided on the circumferential surface of the cooperation position. The surface where the partition (41) and the upper cover (12) are pressed together is provided with a protrusion (46).

8. The electronic oil pump according to claim 4, characterized in that: The main housing (11) is provided with a motor chamber for accommodating a motor assembly (2) and an oil pump chamber for accommodating an oil pump mechanism (3). The motor assembly (2) further comprises a motor stator (21), a motor rotor and a rotating shaft (22) arranged in the motor chamber. The rotating shaft (22) extends into the oil pump chamber. The bridging terminal (23) is arranged on the motor stator (21).

9. An electronic oil pump according to claim 8, characterized in that: The oil pump mechanism (3) comprises an oil pump outer gear ring (31) arranged in the oil pump chamber, and an oil pump inner gear (32) connected to the rotating shaft (22); the oil pump outer gear ring (31) and the rotating shaft (22) are eccentrically arranged to form a high-pressure area and a low-pressure area in the oil pump chamber; the main housing (11) is provided with an oil inlet groove (1101) connected to the high-pressure area and the motor chamber, and an oil return port (1102) connected to the low-pressure area and the motor chamber.

10. An electronic oil pump according to claim 9, characterized in that: The oil pump chamber is surrounded by a main shell (11) and a lower cover (13), and the lower cover (13) is provided with an oil outlet (1301) connected to the high-pressure area and an oil inlet (1302) connected to the low-pressure area.

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