Electronic oil pump

Abstract

The utility model 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 utility model belongs to the technical field of oil pump, specifically relates to an electronic oil pump. BACKGROUND

[0002] The electronic oil pump of engine is the oil pump of motor drive, is mainly composed of motor, controller and pump body, can adjust output pressure and flow according to demand, adapts to different working conditions, has high precision, low energy consumption and other advantages, is widely used in the fields such as automobile and engineering machinery.

[0003] The existing electronic oil pump generally has electrical chamber, motor chamber and oil pump chamber, in order to provide cooling and lubricate the rotating shaft of motor for motor chamber, generally sets up the oil inlet groove in the high pressure area of oil pump chamber, makes high pressure oil enter motor chamber for lubrication and cooling through the oil inlet groove, and flows back in the low pressure area of oil pump chamber, and the electrical chamber and motor chamber need wiring to power motor, and the existing wiring mode is generally sealed connection through the matching hole, such as the patent application No.202310337929.2 discloses a platform electronic oil pump, the wiring mode is higher to the tolerance requirement of the matching place, and gap is prone to appear under the long-term erosion of oil, and a small amount of oil enters the electrical chamber. UTILITY MODEL CONTENTS

[0004] The utility model discloses a kind of electronic oil pumps to solve the above problems.

[0005] The utility model achieves the above-mentioned purposes by the following technical solutions:

[0006] An electronic oil pump, comprising a housing, an electrical unit disposed within the housing, and an oil pump execution unit, the housing further comprises a separation component for separating the electrical unit and the oil pump execution unit, the separation component comprises a separation piece and a bridge piece penetrating the separation piece and embedded with the separation piece, one end of the bridge piece is connected with the oil pump execution unit, and the other end is connected with the electrical unit.

[0007] As a further optimization scheme of the utility model, the surface of the separation piece is further provided with a glue storage groove around the bridge piece, the present scheme further sets up the protruding glue storage groove, forms an area around the bridge piece, and fills solid glue in the area, which can eliminate the gap problem between the bridge piece and the separation piece caused by thermal expansion and contraction to a certain extent.

[0008] As a further optimization scheme of the utility model, the oil pump execution unit includes the motor assembly and the oil pump mechanism arranged in the shell, the motor assembly includes the bridging terminal matched with the bridging piece, the bridging piece is provided with the clamping groove on the surface, the bridging piece is inserted with the bridging terminal, and the edge of the clamping groove pierces the wire skin of the motor assembly to conduct, one end of the bridging piece entering the cavity of the electrical unit is provided with a plurality of connecting parts and is connected with the electrical unit, the bridging piece pierces the wire skin through the clamping groove to conduct electricity, the bridipping piece is conveniently butt-jointed with the bridging terminal through the mode, the exposed area of the wire is avoided, and the wire insulation is facilitated.

[0009] As a further optimization scheme of the utility model, the shell includes a main shell, an upper cover and a lower cover, and is conveniently modularized by being arranged in a split connection mode.

[0010] As a further optimization scheme of the utility model, the electrical unit includes a control panel, the control panel is fixedly connected with the partition piece through rivets, the partition piece is arranged between the main shell and the upper cover, one side of the partition piece is provided with a terminal block penetrating the shell, the control panel and the terminal block are communicated through the terminal block embedded in the partition piece, the partition piece is made of insulating plastic material, the terminal block and the bridging piece can be embedded with each other, insulation and waterproof are facilitated, and modular production is facilitated.

[0011] As a further optimization scheme of the utility model, the upper cover is provided with a waterproof breather valve, and the waterproof breather valve is used for ventilating the cavity of the electrical unit.

[0012] As a further optimization scheme of the utility model, the upper cover and the main shell are fixedly connected and the partition piece is clamped therebetween, both ends of the partition piece extend out of the cylindrical structure and are matched with the upper cover and the main shell respectively, the circumferential surface of the matched position is provided with a sealing ring, the surface of the partition piece matched with the upper cover is provided with a protruding part, the partition piece is fixed by being clamped by the upper cover and the main shell, the machining tolerance is high during machining, the cost is high, the protruding part is arranged in the scheme, the protruding part is flattened by the upper cover during fixing between the upper cover and the main shell, the purpose of interference fit is achieved, the partition piece is completely fixed on the basis of low tolerance requirement, and axial movement is prevented.

[0013] As a further optimization scheme of the utility model, the main shell is provided with a motor cavity accommodating the motor assembly and an oil pump cavity accommodating the oil pump mechanism, the motor assembly further includes a motor stator, a motor rotor and a rotating shaft arranged in the motor cavity, the rotating shaft extends into the oil pump cavity, and the bridging terminal is arranged on the motor stator.

[0014] As a further optimization scheme of the utility model, the oil pump mechanism includes the oil pump outer gear ring arranged in the oil pump chamber, the oil pump inner gear connected with the rotating shaft, the oil pump outer gear ring is arranged eccentrically with the rotating shaft to form the high pressure area and the low pressure area in the oil pump chamber, the main shell is provided with the oil inlet groove communicated with the high pressure area and the motor chamber, the oil return port communicated with the low pressure area and the motor chamber, the rotating shaft is in interference fit with the oil pump inner gear, the oil pump mechanism of the scheme is the internal gear pump, the oil pump inner gear is rotated to form two volume dynamic change areas between the oil pump inner gear and the oil pump outer gear ring, the high pressure area and the low pressure area are formed, the oil is inhaled / discharged, the oil inlet groove is communicated with the high pressure area, is lubricated through the cooperation of the rotating shaft and the main shell, then enters the motor chamber to cool the motor chamber, and returns to the low pressure area from the oil return port after cooling.

[0015] As a further optimization scheme of the utility model, the oil pump chamber is formed by the main shell and the lower cover, the lower cover is provided with the oil outlet communicated with the high pressure area and the oil inlet communicated with the low pressure area, the connection and cooperation mode of the lower cover and the main shell is further proposed, and the mounting hole is further arranged on the lower cover to facilitate connection with the engine structure.

[0016] The utility model discloses the beneficial effect lies in:

[0017] The utility model discloses the bridge piece is embedded in the separator, can set up the bridge terminal corresponding with the bridge piece in the oil pump execution unit, passes through the butt joint of two and conducts electricity, and the separator adopts the plastic material quality and can be completely covered on the bridge piece, and the setting mode of mutual embedding of two greatly improves the sealing effect, and has higher corrosion resistance effect, and the bridge piece of metal material quality is connected and can have certain deformation ability, and the requirement of assembly tolerance is low, facilitates the modular production;

[0018] The product adopts the electrical connection of no welding, and the motor winding enameled wire is conducted through the terminal puncture, is connected with the circuit board through the fish eye terminal, and two terminals are conducted through the connector, simplify the production process, and the qualified rate is high, and the product is reliable. ACCURACY OF DRAWINGS

[0019] Figure 1 It is the overall structure schematic diagram of the utility model;

[0020] Figure 2 It is the utility model's Figure 1 Structure explosion map;

[0021] Figure 3 It is the utility model's plan view;

[0022] Figure 4 It is the main view of the utility model;

[0023] Figure 5It is the lower cover structure schematic view of the utility model;

[0024] Figure 6 It is the Figure 5 The oil pump mechanism schematic view after removing the lower cover in the middle;

[0025] Figure 7 It is the Figure 6 The schematic view after further removing the oil pump inner gear in the middle;

[0026] Figure 8 It is the bridge piece and motor stator cooperation schematic view of the utility model;

[0027] Figure 9 It is the Figure 8 The structure and partition piece connection schematic view in the middle;

[0028] Figure 10 It is the bridge piece schematic view of the utility model;

[0029] Figure 11 It is the motor assembly schematic view of the utility model;

[0030] Figure 12 It is the bridge piece both ends connection schematic view of the utility model;

[0031] In the drawing: 1, shell;11, main shell;1101, oil inlet groove;1102, oil return port;12, upper cover;1201, waterproof breather valve;13, lower cover;1301, oil outlet;1302, oil inlet;2, motor assembly;21, motor stator;22, rotating shaft;23, bridge terminal;24, bridge piece;2401, clamping groove;2402, connecting part;3, oil pump mechanism;31, oil pump outer gear ring;32, oil pump inner gear;4, partition assembly;41, partition piece;42, wiring seat;43, glue storage groove;44, control board;45, wiring terminal;46, protruding part. DETAILED DESCRIPTION

[0032] The following further describes the present application in conjunction with the drawings, and it is necessary to point out here that the following detailed description is only used to further illustrate the present application, and cannot be understood as limiting the scope of protection of the present application, and the skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0033] Example 1

[0034] As Figures 1-12As shown in the figure, an electronic oil pump comprises a housing 1, an electrical unit and an oil pump execution unit arranged in the housing 1, and a separation assembly 4 for separating the electrical unit and the oil pump execution unit, the separation assembly 4 comprising a separation piece 41 and a bridge piece 24 penetrating through the separation piece 41 and embedded with the separation piece 41, one end of the bridge piece 24 being connected with the oil pump execution unit and the other end being connected with the electrical unit.

[0035] According to the present scheme, the bridge piece 24 is embedded in the separation piece 41, and the bridge terminal 23 corresponding to the bridge piece 24 can be arranged in the oil pump execution unit, and the two are in conductive connection through butt joint, the separation piece 41 is made of plastic material and can be completely wrapped on the bridge piece 24, the embedded arrangement of the two greatly improves the sealing effect and has high corrosion resistance, and the bridge piece 41 made of metal material has certain deformation ability and low requirement for assembly tolerance, facilitating modular production.

[0036] As shown in the figure, Figure 11 The separation piece 41 is divided into three sections of upper piece, middle piece and lower piece, and an arc chamfer is arranged between each section, and when installed, the chamfer has a certain bending space, so that when the bridge piece 24 is butt jointed with the bridge terminal 23, even if there is a certain tolerance, the chamfer has strong compatibility, and the requirement for position processing tolerance is not high.

[0037] Further, the surface of the separation piece 41 is further provided with a glue storage groove 43 around the bridge piece 24, and the glue storage groove 43 is further provided with a protrusion, which surrounds the bridge piece 24 to form a region, and solid glue is filled in the region, which can eliminate the gap problem between the bridge piece 24 and the separation piece 41 caused by long-term thermal expansion and cold contraction to a certain extent.

[0038] The oil pump execution unit comprises a motor assembly 2 and an oil pump mechanism 3 arranged in the shell 1, the main shell 11 is provided with a motor chamber accommodating the motor assembly 2 and an oil pump chamber accommodating the oil pump mechanism 3, the motor assembly 2 comprises a bridging terminal 23 matched with a bridging piece 24, the bridging piece 24 is provided with a clamping groove 2401 on the surface, when the bridging piece 24 is inserted into the bridging terminal 23, the edge of the clamping groove 2401 pierces the wire skin of the motor assembly 2 to conduct, one end of the bridging piece 24 entering the chamber where the electrical unit is located is provided with a plurality of connecting parts 2402 connected with the electrical unit, in this way, the bridging piece 24 is conveniently connected with the bridging terminal 23, the exposed area of the wire is avoided, the wire insulation is beneficial, the connecting part 2402 is connected with the control panel 44 through interference fit or welding, the connecting part 2402 can be provided as a fish eye terminal, the number of the fish eye terminal is determined according to the power size, three fish eye terminals are arranged in the embodiment, each bridging piece 24 has three fish eye terminals connected with the control panel 44, the bridging terminal 23 is provided with a hole, the wire of the motor is inserted into the bridging terminal 23, when the bridging piece 24 is inserted, the edge of the clamping groove 2401 pierces the wire skin as a piercing terminal to conduct, the number of the piercing terminal on each bridging piece 24 is increased or decreased according to the power size.

[0039] Further, the shell 1 comprises a main shell 11, an upper cover 12 and a lower cover 13, by setting a split connection, modular production is facilitated, the main shell 11 and the upper cover 12 and the main shell 11 and the lower cover 13 are fixedly connected through bolts, the main shell 11 is provided with a motor chamber accommodating the motor assembly 2 and an oil pump chamber accommodating the oil pump mechanism 3.

[0040] The electrical unit comprises a control panel 44, the control panel 44 is fixedly connected with a partition 41 through a rivet buckle, the partition 41 is arranged between the main shell 11 and the upper cover 12, and the partition 41 is provided with a wire holder 42 penetrating out of the shell 1 on one side, the control panel 44 and the wire holder 42 are communicated through a wire terminal 45 embedded in the partition 41, the partition 41 is made of insulating plastic material, the wire terminal 45 and the bridging piece 24 can be embedded and formed with each other, which is helpful for insulation and waterproofing, facilitates modular production, the upper cover 12 is provided with a waterproof breather valve 1201, the waterproof breather valve 1201 adopts the existing technology and is used for ventilating the chamber where the electrical unit is located.

[0041] The upper cover 12 is fixedly connected between the main shell 11 and clamps the partition piece 41 in the middle, the two ends of the partition piece 41 extend out of the cylindrical structure and are matched with the upper cover 12 and the main shell 11 respectively, and the circumferential surface of the matching position is provided with a sealing ring, and the surface matched and pressed by the partition piece 41 and the upper cover 12 is provided with a protruding part 46. Since the partition piece 41 is clamped and fixed by the upper cover 12 and the main shell 11, higher requirements are required for the machining tolerance during processing, resulting in higher product control cost. The protruding part 46 is arranged in the present scheme, and the protruding part 46 is flattened by the upper cover 12 when the upper cover 12 and the main shell 11 are fixed, so as to achieve the purpose of interference fit, and the partition piece 41 is completely fixed on the basis of low tolerance requirement, thereby preventing axial movement.

[0042] The motor assembly 2 comprises a motor stator 21, a motor rotor and a rotating shaft 22 arranged in the main shell 11. The rotating shaft 22 extends into the oil pump chamber. The bridge terminal 23 is arranged on the motor stator 21. The present scheme is a common motor structure. The rotating shaft 22 is in interference fit with the motor rotor. In the motor stator 21, the wiring mode is to pass the wire from the lower side of the motor stator 21, that is, the end away from the bridge terminal 23. The lower wiring can reduce the length of the motor, which is beneficial to save space. Figure 11

[0043] 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 with the rotating shaft 22. The oil pump outer gear ring 31 is arranged eccentrically with the rotating shaft 22 to form a high-pressure area and a low-pressure area in the oil pump chamber. The main shell 11 is provided with an oil inlet groove 1101 communicating with the high-pressure area and the motor chamber and an oil return port 1102 communicating with the low-pressure area and the motor chamber. The rotating shaft 22 is in interference fit with the oil pump inner gear 32. The oil pump mechanism 3 of the present scheme is an internal gear pump. The rotation of the oil pump inner gear 32 forms two regions with dynamic volume change between the oil pump inner gear 32 and the oil pump outer gear ring 31, thereby forming a high-pressure area and a low-pressure area. The oil is discharged / absorbed. The oil inlet groove 1101 communicates with the high-pressure area and is lubricated through the gap between the rotating shaft 22 and the main shell 11. Then the oil enters the motor chamber from the gap to cool the motor chamber. After cooling, the oil returns to the low-pressure area from the oil return port 1102.

[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 communicating with the high-pressure area and an oil inlet 1302 communicating with the low-pressure area. The present scheme further proposes a connection and matching mode of the lower cover 13 and the main shell 11. The lower cover 13 is further provided with a mounting hole for facilitating connection with the engine structure.

[0045] ​The embodiment is specific: the embodiment is a three-phase motor, three bridge pieces 24 and bridge terminals 23 are arranged, in operation, the control board 44 supplies power to the motor assembly 2 through the three bridge pieces 24 by connecting the terminal 45 with the external electrical connection, the motor assembly 2 rotates to drive the rotating shaft 22 to rotate, the rotating shaft 22 drives the oil pump inner gear 32 to rotate, and the high-pressure area and the low-pressure area are formed between the oil pump outer gear ring 31, the high-pressure area pumps the oil from the oil outlet 1301, and the oil is pumped into the gap between the main shell 11 and the rotating shaft 23 from the oil inlet groove 1101, and further enters the motor cavity from the gap, and enters the low-pressure area at the oil return port 1102, and the low-pressure area also sucks the external oil from the oil inlet 1302.

[0046] In the production and installation, the bridge piece 24 and the connecting terminal 45 are thermoplastic over-molded through the partition piece 41, the control board 44 is installed on the partition piece 41, and the bridge piece 24 and the control board 44 are fixed, the motor assembly 2 is installed first, then the partition piece 41 is put into the main shell 11, the bridge piece 24 is inserted into the bridge terminal 23, the wire skin is pierced to conduct the wire, the upper cover 12 is installed, and the oil pump mechanism 3 is installed according to the prior art.

[0047] The above embodiment only expresses several embodiments of the utility model, the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection range of the utility model.

Claims

1. An electric oil pump comprising a housing (1), an electric unit arranged in the housing (1), and an oil pump execution unit, characterized in that: The shell (1) is further provided with a separation assembly (4) for separating the electrical unit and the oil pump execution unit, the separation assembly (4) comprises a separation piece (41) and a bridge piece (24) penetrating the separation piece (41) and being embedded with the separation piece (41), one end of the bridge piece (24) is connected with the oil pump execution unit, and the other end is connected with the electrical unit.

2. An electric oil pump according to claim 1, characterized in that: The surface of the separation piece (41) is further provided with a glue storage groove (43) around the bridge piece (24).

3. An electric oil pump according to claim 1, characterized in that: The oil pump execution unit comprises a motor assembly (2) and an oil pump mechanism (3) arranged in the shell (1), the motor assembly (2) comprises a bridge terminal (23) matched with the bridge piece (24), the surface of the bridge piece (24) is provided with a clamping groove (2401), when the bridge piece (24) is inserted with the bridge terminal (23), the edge of the clamping groove (2401) pierces the wire skin of the motor assembly (2) to conduct, and one end of the bridge piece (24) entering the cavity of the electrical unit is provided with a plurality of connection parts (2402) connected with the electrical unit.

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

5. An electric oil pump according to claim 4, characterized in that: The electrical unit comprises a control panel (44) fixedly connected with the separation piece (41) through rivets, the separation piece (41) is arranged between the main shell (11) and the upper cover (12), and one side of the separation piece (41) is provided with a wire holder (42) penetrating the shell (1), and the control panel (44) and the wire holder (42) are communicated through a wire terminal (45) embedded in the separation piece (41).

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

7. An electric oil pump according to claim 5, characterized in that: The upper cover (12) is fixedly connected with the main shell (11) and clamps the separation piece (41) in the middle, both ends of the separation piece (41) extend out of the cylindrical structure and are matched with the upper cover (12) and the main shell (11) respectively, and the circumferential surface of the matched part is provided with a sealing ring, and the surface of the separation piece (41) matched with the upper cover (12) is provided with a protruding part (46).

8. An electric oil pump according to claim 4, characterized in that: The main shell (11) is provided with a motor cavity accommodating the motor assembly (2) and an oil pump cavity accommodating the 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 cavity, the rotating shaft (22) extends into the oil pump cavity, and the bridge terminal (23) is arranged on the motor stator (21).

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

10. An electric oil pump according to claim 9, characterized in that: The oil pump cavity is formed by the main shell (11) and the lower cover (13), the lower cover (13) is provided with an oil outlet (1301) communicated with the high pressure area and an oil inlet (1302) communicated with the low pressure area.

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