High-pressure electronic oil pump, suspension system and vehicle

Abstract

The utility model relates to the technical field of vehicle engineering, in particular to a high-pressure electronic oil pump, a suspension system and a vehicle. The high-pressure electronic oil pump comprises a motor shell, a first pump shell, a second pump shell and a gear pump assembly. A motor is arranged in the motor shell; the first pump shell is connected with the motor shell, a first shaft hole for a motor shaft to penetrate through is formed in the first pump shell, and an axial oil collecting groove communicated with the motor rotor cooling cavity is formed in the hole wall of the first shaft hole; the second pump shell is connected with the first pump shell to form a mounting inner cavity, and a second shaft hole matched with a motor shaft is formed in the second pump shell; the gear pump assembly is arranged in the mounting inner cavity, and the motor shaft is in transmission fit with the gear pump assembly; in the working state, the axial oil collecting groove is located below the motor shaft. The cooling efficiency of the electronic oil pump can be improved to a certain extent, and certain oil consumption is saved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of vehicle engineering, in particular to a high-pressure electronic oil pump, a suspension system and a vehicle. BACKGROUND

[0002] With the rapid development of the automobile industry, the industry increasingly values the intelligence, electrification and comfort of automobiles, and therefore the research and development of the electrification of chassis systems has become a top priority. As a main component of the suspension system, the electronic oil pump provides a power source for the active suspension system, and therefore the research and development of the electronic oil pump technology has become one of the main research and development directions of the active suspension of the current automobile. The current suspension system cannot automatically adjust to different driving needs and road conditions, which reduces the controllability and comfort. However, the active suspension with the oil pump can adjust the damping in real time, has a fast response speed, and makes the automobile travel more comfortable and controllable.

[0003] A Chinese utility model patent with the publication number CN118273947A discloses an internal gear pump, an integrated motor pump and a vehicle, which can better transmit the pressure fluctuation of the fluid between the driving gear and the driven gear ring to the crescent plate, optimizes the fluid dynamics performance of the internal gear pump, and improves the working efficiency of the internal gear pump. However, during operation, the oil will leak from the gap between the gear pump teeth and accumulate downward, so that there will be a difference between the pump-in amount and the pump-out amount of the gear pump, which will increase the oil consumption, and the overall efficiency of the oil pump will relatively obviously decrease after long-time operation. SUMMARY

[0004] The application provides a high-pressure electronic oil pump, a suspension system and a vehicle. An oil collecting groove is formed in the inner hole of the pump shell, and the oil collecting groove is communicated with the motor rotor cooling cavity, so that the leaked oil can enter the motor rotor cooling cavity through the oil collecting groove to perform a cooling function, thereby solving the problem that the pump-in amount and the pump-out amount of the existing gear pump are different, which leads to increased oil consumption and relatively low overall efficiency of the oil pump.

[0005] The application is implemented through the following technical solutions:

[0006] In a first aspect, the application provides a high-pressure electronic oil pump, comprising:

[0007] A motor shell is configured with a motor;

[0008] A first pump shell is connected with the motor shell, and a first shaft hole through which a motor shaft passes is formed in the first pump shell, wherein an axial oil collecting groove communicated with a motor rotor cooling cavity is formed in the hole wall of the first shaft hole;

[0009] A second pump shell is connected with the first pump shell to form a mounting inner cavity, and a second shaft hole is formed in the second pump shell to match the motor shaft;

[0010] A gear pump assembly is arranged in the mounting inner cavity, and the motor shaft is in transmission cooperation with the gear pump assembly.

[0011] In the working state, the axial oil collecting groove is located below the motor shaft.

[0012] The high-pressure electronic oil pump provided in the application can collect the oil leaked from the gear pump assembly in the axial oil collecting groove. Since the gear pump assembly is on the high-pressure side relative to the motor rotor cooling cavity, the oil in the axial oil collecting groove can enter the motor rotor cooling cavity to cool the motor rotor and be pumped out by the gear pump assembly together with the oil discharged from the motor shaft. Compared with the existing electronic oil pump, the leaked oil in the gear pump assembly can participate in the cooling of the motor rotor and be pumped out by the gear pump assembly, so that the difference between the pump-in amount and the pump-out amount of the electronic oil pump is smaller, the cooling efficiency is relatively better, the oil consumption is reduced, and the effect is more obvious in long-term work.

[0013] In some optional embodiments, the axial oil collecting groove is located directly below the motor shaft.

[0014] In some optional embodiments, the cross-sectional flow area of the axial oil collecting groove is 2-20.4 mm 2 .

[0015] In some optional embodiments, the axial oil collecting groove is arranged as a U-shaped groove.

[0016] In some optional embodiments, the diameter of the axial oil collecting groove is 12-25% of the diameter of the first shaft hole.

[0017] In some optional embodiments, a monitoring assembly is arranged in the motor housing and located at one axial end of the motor shaft to detect the rotation angle of the motor shaft.

[0018] In some optional embodiments, the monitoring assembly comprises:

[0019] A crimping seat is connected with the motor housing, the crimping seat has a first crimping groove and a second crimping groove, the first crimping groove and the second crimping groove have the same extension direction and opposite slot openings, a crimping hole is formed in the crimping seat to communicate the first crimping groove and the second crimping groove, and a clamping groove is formed in the crimping seat and located between the first crimping groove and the second crimping groove.

[0020] A control board is inlaid in the clamping groove;

[0021] A first sensor is located in the first crimping groove and is crimped on the control board;

[0022] A second sensor is located in the second crimping groove and is crimped on the control board.

[0023] In some optional embodiments, a plurality of arc-shaped grooves are arranged on the inner wall of the motor housing, and the arc-shaped grooves are filled with sealing glue to realize the connection between the motor housing and the motor stator.

[0024] In some optional embodiments, the first pump housing has two oil return holes communicating with the motor rotor cooling cavity, and a one-way valve is arranged in the oil return hole.

[0025] In a second aspect, the application provides a suspension system comprising any one of the motor pump assemblies of the first aspect.

[0026] In a third aspect, the application provides a vehicle comprising any one of the motor pump assemblies of the first aspect or the suspension system of the second aspect.

[0027] Compared with the prior art, the application has the following advantages and beneficial effects:

[0028] The high-pressure electronic oil pump, the suspension system and the vehicle provided by the application can realize the following effects: the oil leaked from the gear pump assembly can be collected in the axial oil collection groove arranged on the first pump housing, and since the gear pump assembly is on the high-pressure side relative to the motor rotor cooling cavity, the oil in the axial oil collection groove can enter the motor rotor cooling cavity to participate in the cooling of the motor rotor and be pumped out by the gear pump assembly together with the oil discharged from the motor shaft. Compared with the existing electronic oil pump, the oil leaked from the gear pump assembly can not continuously accumulate in the first pump housing and the second pump housing, but can participate in the cooling of the motor rotor and be pumped out by the gear pump assembly, so that the difference between the pump-in amount and the pump-out amount of the electronic oil pump is smaller, the cooling efficiency is relatively better, the oil consumption is reduced, and the effect is more obvious under long-term work. BRIEF DESCRIPTION OF DRAWINGS

[0029] The drawings described herein are used to provide further understanding of the embodiments of the application, constitute a part of the application, and do not constitute a limitation to the embodiments of the application. In the drawings:

[0030] Figure 1 The high-pressure electronic oil pump cross-sectional structure schematic diagram provided by the embodiments of the application;

[0031] Figure 2 The high-pressure electronic oil pump cross-sectional structure schematic diagram provided by the embodiments of the application; Figure 1 The enlarged structure schematic diagram at A in the high-pressure electronic oil pump cross-sectional structure schematic diagram provided by the embodiments of the application;

[0032] Figure 3 For Figure 1 Amplification structure schematic diagram at B in the middle.

[0033] Markings in the drawings and corresponding component names:

[0034] 1 - motor housing, 2 - first pump shell, 3 - second pump shell, 4 - gear pump assembly, 5 - axial oil collecting groove, 6 - motor shaft, 7 - crimping seat, 8 - first sensor, 9 - second sensor, 10 - control board, 11 - Hall partition. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the present application clearer, further detailed description of the present application will be made below in combination with examples and drawings, the illustrative embodiments of the present application and the description thereof are only used to explain the present application, and do not limit the present application.

[0036] As Figures 1-3 shown, in a first aspect, the embodiments of the present application provide a high-pressure electronic oil pump, which comprises a motor housing 1, a first pump shell 2, a second pump shell 3 and a gear pump assembly 4; a motor is arranged in the motor housing 1; the first pump shell 2 is connected with the motor housing 1, and a first shaft hole through which the motor shaft 6 passes is formed in the first pump shell 2, wherein an axial oil collecting groove 5 communicating with a motor rotor cooling cavity is formed in the hole wall of the first shaft hole; the second pump shell 3 is connected with the first pump shell 2 to form a mounting inner cavity, and a second shaft hole for cooperating with the motor shaft 6 is formed in the second pump shell 3; the gear pump assembly 4 is arranged in the mounting inner cavity, wherein the motor shaft 6 is in driving cooperation with the gear pump assembly 4; in the working state, the axial oil collecting groove 5 is located below the motor shaft 6.

[0037] The high-pressure electronic oil pump provided by the present application can collect the oil leaked from the gear pump assembly 4 in the axial oil collecting groove 5 after setting the axial oil collecting groove 5 on the first pump shell 2, and since the gear pump assembly 4 is on the high-pressure side relative to the motor rotor cooling cavity, the oil in the axial oil collecting groove 5 can enter the motor rotor cooling cavity to participate in the cooling of the motor rotor, and be pumped out by the gear pump assembly 4 together with the oil discharged from the motor shaft 6. Compared with the existing electronic oil pump, the oil leaked from the gear pump assembly 4 can not continuously accumulate in the first pump shell 2 and the second pump shell 3, but can participate in the cooling of the motor rotor and be pumped out by the gear pump assembly 4, so that the difference between the pump-in amount and the pump-out amount of the electronic oil pump is smaller, the cooling efficiency is relatively better, the oil consumption is reduced, and the effect is more obvious under long-term work.

[0038] In the embodiment of the application, the second pump shell 3 is provided with an oil inlet and an oil outlet to enable the oil to be circulated and cooled in the electronic oil pump; the first pump shell 2 is provided with corresponding oil passing holes, one of which is in communication with the motor rotor cooling cavity and the other of which is in communication with the oil passing hole on the motor shaft 6; the positions of the oil passing holes / oil inlets / oil outlets on the first pump shell 2 and the second pump shell 3 can refer to the prior art, which will not be described here.

[0039] In the embodiment of the application, the motor is the motor structure in the existing electronic oil pump, which generally comprises a stator connected with the motor shell 1 and a rotor matched with the stator, the motor shaft 6 is connected with the rotor to rotate with the rotor, the motor shaft 6 is hollow and provided with oil passing holes in communication between the inside and outside of the motor shaft 6, and the bearing bush of the motor rotor is provided with an axial oil passing hole; when the oil enters the oil passing holes in the motor shaft 6 and on the motor rotor, the oil can cool the motor rotor; the oil passing holes on the motor shaft 6 are at least two and located at the axial two ends of the motor shaft 6 to serve as oil inlets and outlets; after the oil flows out of the motor shaft 6, it can enter the motor rotor cooling cavity and the oil passing hole in the bearing bush of the motor rotor.

[0040] In the embodiment of the application, the gear pump assembly 4 can adopt the existing internal gear pump; after the oil enters the oil inlet on the second pump shell 3, it is pumped into the motor shaft 6 by the gear pump assembly 4, then enters the motor rotor cooling cavity, and then enters the oil passing hole in the bearing bush of the motor rotor to cool the motor rotor, and finally is pumped out of the oil outlet on the second pump shell 3 by the gear pump assembly 4.

[0041] In the embodiment of the application, in the working state, as long as the axial oil collecting groove 5 is located below the motor shaft 6, the oil can flow into the axial oil collecting groove 5 under the action of its own gravity; in order to ensure the oil accumulation effect of the axial oil collecting groove 5 and the oil collecting amount under the condition of limited space, in some optional embodiments, the axial oil collecting groove 5 is located directly below the motor shaft 6, that is, the motor shaft 6 is axially horizontal, and the slot of the axial oil collecting groove 5 is vertically upward.

[0042] The cross-sectional flow area of the axial oil collecting groove 5 needs to be appropriate; if the area is too large, the gear pump assembly 4 and the motor rotor cooling cavity form a relatively open channel, which may exacerbate the oil leakage of the gear pump assembly 4; if the area is too small, the oil in the motor rotor cooling cavity will not be compensated, that is, the amount of oil flowing from the axial oil collecting groove 5 to the motor rotor cooling cavity cannot keep up with the overall oil circulation; in order to adapt to different sizes of the first shaft hole, in some optional embodiments, the cross-sectional flow area of the axial oil collecting groove 5 is 2-20.4mm 2 .

[0043] The cross-sectional shape of the axial oil collection groove 5 can not be limited, and the extending direction thereof can also not be limited, as long as it can communicate the gear pump assembly 4 with the motor rotor cooling cavity through a suitable cross-sectional flow area. Of course, in order to make the oil flow more smoothly in the axial oil collection groove 5, in some optional embodiments, the axial oil collection groove 5 is provided as a U-shaped groove.

[0044] In the embodiments of the present application, when the axial oil collection groove 5 is provided as a U-shaped groove, the inner wall of the axial oil collection groove 5 is relatively smooth and flat, and the oil is more easily passed through. In other embodiments, the U-shaped groove can also be replaced by a semicircular groove, an elliptical groove, etc.

[0045] In the embodiments of the present application, the extending direction of the axial oil collection groove 5 is parallel to the axial direction of the motor shaft 6, so that the oil can enter the motor rotor cooling cavity more quickly, and the probability of being blocked is smaller.

[0046] In some optional embodiments, the diameter of the axial oil collection groove 5 is 12-25% of the first shaft hole diameter.

[0047] In the embodiments of the present application, the U-shaped groove can be regarded as a combination of a rectangular groove and a semicircular groove, wherein the diameter of the semicircular groove is 12-25% of the first shaft hole diameter.

[0048] In some optional embodiments, a monitoring assembly is arranged in the motor housing 1, and the monitoring assembly is located at one end of the motor shaft 6 in the axial direction to detect the rotation angle of the motor shaft 6.

[0049] In the embodiments of the present application, through the arrangement of the detection assembly, the rotation angle, rotation direction, and rotation speed of the motor shaft 6 can be detected, thereby facilitating the analysis of the health status of the electronic oil pump.

[0050] In some optional embodiments, the monitoring assembly includes a crimping seat 7, a control board 10, a first sensor 8, and a second sensor 9. The crimping seat 7 is connected with the motor housing 1, and in actual implementation, the crimping seat 7 and the motor housing 1 can be an integrally formed structure. The specific shape of the crimping seat 7 can be a circular column. A first crimping groove and a second crimping groove are formed by inwardly guiding a hole from the end faces of the axial ends of the crimping seat 7, that is, the extending directions of the first crimping groove and the second crimping groove coincide and the grooves are oppositely directed. A crimping hole is also formed in the crimping seat 7 to communicate the first crimping groove and the second crimping groove. The shape of the crimping hole is also circular, and the diameter of the crimping hole is smaller than the diameter of the first crimping groove, thereby forming a step. A clamping groove is also formed in the crimping seat 7, and the shape of the clamping groove can be a rectangular groove. The clamping groove communicates with the outside of the motor housing 1 and is located between the first crimping groove and the second crimping groove, that is, the crimping hole is located in the clamping groove. The control board 10 is embedded in the clamping groove. The first sensor 8 is located in the first crimping groove and is crimped on the control board 10. The second sensor 9 is located in the second crimping groove and is crimped on the control board 10.

[0051] In the embodiment of the present application, the first sensor 8 and the second sensor 9 can be crimped through the crimping seat 7, and the first sensor 8 and the second sensor 9 can also limit the control panel 10, thereby ensuring the stability of the control panel 10 in the clamping groove. In actual implementation, the first sensor 8 and the second sensor 9 are both Hall sensors, and can be crimped in the first crimping groove and the second crimping groove through the Hall partition plate 11. The Hall partition plate 11 is tightly matched with the first crimping groove or the second crimping groove, and sealing treatment is performed therebetween through a sealing ring.

[0052] In the embodiment of the present application, the motor outgoing line adopts a busbar structure, the internal structure of which is arranged using three layers of copper bars, red copper T2 is plated with nickel 1.3-3 um, the outer layer is plated with mist tin 2.5-5 um, the outside is secondarily injection molded with PBT+30GF to ensure the strength and the position accuracy with the 3Pin head, the busbar has a buckle structure, which can be fixed to the motor stator, thereby dissipating part of the heat generated by the winding through the copper bar.

[0053] In some optional embodiments, the inner wall of the motor housing 1 is provided with a plurality of arc-shaped grooves, and the arc-shaped grooves are filled with sealing glue to realize the connection of the motor housing 1 and the motor stator.

[0054] In the embodiment of the present application, after the sealing glue is injected into the arc-shaped groove and solidified, the motor stator adhered with the sealing glue can be limited by the groove wall in the arc-shaped groove, thereby ensuring the stability of the motor stator in the motor housing 1.

[0055] In some optional embodiments, the first pump housing 2 has two oil return holes communicating with the motor rotor cooling cavity, and a one-way valve is arranged in the oil return hole.

[0056] In the embodiment of the present application, the two oil return holes play a role of returning oil when the motor rotates forward or reversely, so that the oil in the motor rotor cooling cavity returns to the pump head, and the one-way valve arranged therein can control the flow direction of the oil, thereby ensuring more stable circulation of the oil.

[0057] In the second aspect, the embodiment of the present application provides a suspension system comprising any one of the motor pump assemblies of the first aspect.

[0058] In the third aspect, the embodiment of the present application provides a vehicle comprising any one of the motor pump assemblies of the first aspect, or comprising the suspension system of the second aspect.

[0059] The foregoing description of the exemplary embodiment of the application has been presented for the purposes of illustration and description. It is not intended to be exhaustive or to limit the application to the precise form disclosed. Many modifications and variations are possible in light of this disclosure. It was chosen and described in order to provide the best illustration of the principles of the application and its practical application to thereby enable others skilled in the art to utilize the application in various embodiments and with various modifications as are suited to the particular use contemplated. While the application has been described with reference to specific embodiments thereof, it will be clear to those of ordinary skill in the art that variations and modifications can be affected within the scope of the application. Accordingly, the application is not limited to the specific embodiments described herein, but instead includes all variations and modifications that fall within the scope of the appended claims and their equivalents.

[0060] It should be noted that in this specification and the appended claims, similar reference numerals and letters indicate similar elements in the various figures, and thus once an element is defined in one figure, it should be understood that further description of such element is omitted in the subsequent figures. In the description of the application, it should be understood that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like, are used to denote orientation and / or position relationships in the drawings, and are not intended to denote relative importance of, or orientation limitations for, the apparatuses or elements being described, and thus should not be construed as limiting the application. In addition, the terms "first", "second", etc., are used herein only to describe various instances, and are not used to denote relative importance of, or orientation limitations for, the apparatuses or elements being described. In the description of the application, it should be understood that the terms "mounting", "connected", "connecting" should be given their broadest possible interpretation in accordance with the principles of the application, and thus can encompass fixed connections, detachable connections, or integrally formed connections; mechanical connections, electrical connections, or connections made through intervening medium; and / or connections between elements internal to the apparatuses. The specific meaning of the above terms in the context of the application will be apparent to those of ordinary skill in the art.

[0061] It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Thus, it is intended that the present application cover the modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

Claims

1. A high-pressure electronic oil pump, characterized in that, include: Motor housing (1), wherein a motor is disposed inside the motor housing (1); The first pump housing (2) is connected to the motor housing (1). The first pump housing (2) has a first shaft hole through which the motor shaft (6) passes. The first shaft hole has an axial oil collection groove (5) that communicates with the motor rotor cooling chamber. The second pump housing (3) is connected to the first pump housing (2) to form an installation cavity. The second pump housing (3) has a second shaft hole that mates with the motor shaft (6). Gear pump assembly (4), the gear pump assembly (4) is disposed in the mounting cavity, wherein the motor shaft (6) is in transmission cooperation with the gear pump assembly (4); In the working state, the axial oil collection groove (5) is located below the motor shaft (6).

2. The high-pressure electronic oil pump according to claim 1, characterized in that, In the working state, the axial oil collection groove (5) is located directly below the motor shaft (6).

3. The high-pressure electronic oil pump according to claim 1, characterized in that, The cross-sectional flow area of ​​the axial oil collecting groove (5) is 2~20.4mm. 2 .

4. The high-pressure electronic oil pump according to claim 3, characterized in that, The axial oil collection groove (5) is configured as a U-shaped groove.

5. The high-pressure electronic oil pump according to claim 4, characterized in that, The diameter of the axial oil collection groove (5) is 12 to 25% of the diameter of the first shaft hole.

6. The high-pressure electronic oil pump according to claim 1, characterized in that, A monitoring component is provided inside the motor housing (1), and the monitoring component is located at one end of the motor shaft (6) to detect the rotation angle of the motor shaft (6).

7. The high-pressure electronic oil pump according to claim 6, characterized in that, The monitoring components include: A crimping seat (7) is connected to the motor housing (1). The crimping seat (7) has a first crimping groove and a second crimping groove. The first crimping groove and the second crimping groove extend in the same direction and their openings face opposite directions. The crimping seat (7) also has a crimping hole to connect the first crimping groove and the second crimping groove. The crimping seat (7) also has a snap-fit ​​groove located between the first crimping groove and the second crimping groove. Control board (10), the control board (10) is embedded in the snap-fit ​​groove; The first sensor (8) is located in the first crimping groove and is crimped onto the control board (10); The second sensor (9) is located in the second crimping groove and is crimped onto the control board (10).

8. The high-pressure electronic oil pump according to claim 1, characterized in that, The inner wall of the motor housing (1) is provided with several arc-shaped grooves, and the arc-shaped grooves are filled with sealant to achieve the connection between the motor housing (1) and the motor stator.

9. The high-pressure electronic oil pump according to claim 1, characterized in that, The first pump housing (2) has two oil return holes that communicate with the motor rotor cooling chamber, wherein a one-way valve is provided in the oil return hole.

10. A suspension system, characterized in that, Includes the high-pressure electronic oil pump as described in any one of claims 1 to 9.

11. A vehicle, characterized in that, It includes the high-pressure electronic oil pump as described in any one of claims 1-9, or the suspension system as described in claim 10.

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