A machine base and electronic oil pump
By setting radial reinforcing ribs in the annular part of the electronic oil pump base, the problem of easy deformation of the single bearing structure under high load is solved, the structural strength is improved and the weight is reduced, and the oil pump is prevented from seizing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI SHINHOO NEW ENERGY CO LTD
- Filing Date
- 2025-08-15
- Publication Date
- 2026-06-05
AI Technical Summary
The single-bearing structure of existing low-power electronic oil pumps is prone to stress concentration under high-speed rotation or high load, which leads to deformation of the bearing hole and subsequent oil pump jamming. In addition, the base and bearing materials are prone to deformation during the rotor and gear pressing process.
Multiple radial reinforcing ribs are installed in the annular part of the base to enhance structural strength and ensure that the bearing housing is not easily deformed. A single bearing structure is used to support the rotating shaft to avoid stress concentration.
The structural strength of the electronic oil pump has been improved to prevent rotor jamming, the thickness of the base has been reduced and lightweight, ensuring the stable operation of the oil pump.
Smart Images
Figure CN224326399U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electronic oil pump technology, and in particular relates to a base and an electronic oil pump. Background Technology
[0002] Most existing low-power electronic oil pump bases use a single-bearing structure integrated with the base, meaning the pump's shaft has only one set of bearings to support its rotation.
[0003] Because the single-bearing structure of this electronic oil pump has only one support point on its shaft at the bearing, stress concentration can easily occur in the single-bearing structure when the oil pump is rotating at high speed or under high load, which can cause the oil pump to seize up.
[0004] In addition, since the base and bearings are made of cast aluminum, the bearing holes on the base are prone to deformation during the press-fitting of the rotor and gears. Even slight deformation of the bearing holes can cause the motor rotor to seize up. Utility Model Content
[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a bearing base with a first reinforcing rib, which can improve the structural strength of the bearing base, reduce the thickness of the bearing base, and ensure lightweight.
[0006] Another objective of this invention is to provide an electronic oil pump that uses the aforementioned bearing housing. During operation, this electronic oil pump is less prone to stress concentration and pump jamming.
[0007] To achieve this objective, the present invention adopts the following technical solution:
[0008] A base includes a base body, one end of which is provided with a mounting groove for mounting an oil pump gear, and an annular portion is provided on the opposite side of the bottom of the mounting groove.
[0009] The annular portion is coaxially arranged with the base body;
[0010] The bottom of the mounting groove is provided with an oil port that penetrates the bottom of the groove. The oil port is located on the outside of the annular part and is spaced apart from the annular part.
[0011] The base also includes a plurality of first reinforcing ribs, which are connected to the outer wall of the annular portion and the opposite side of the bottom of the mounting groove.
[0012] At least one of the first reinforcing ribs is radially inserted through the oil port along the base body.
[0013] Preferably, a plurality of the first reinforcing ribs are arranged radially along the annular portion.
[0014] Preferably, a plurality of the first reinforcing ribs are evenly distributed along the circumference of the annular portion.
[0015] Preferably, the number of the first reinforcing ribs is 6-8.
[0016] Preferably, the first reinforcing rib has a triangular cross-section along the radial direction of the annular portion.
[0017] Preferably, the thickness of the first reinforcing rib is 2mm-3.5mm, and the thickness direction is perpendicular to both the radial and axial directions of the annular portion.
[0018] Preferably, a second reinforcing rib is provided on the opposite side of the bottom of the mounting groove. The second reinforcing rib is arranged around the outer periphery of the annular portion and is connected to the first reinforcing rib.
[0019] Preferably, it further includes a housing portion extending axially from the opposite side of the mounting groove, the housing portion being circumferentially disposed around the annular portion;
[0020] The outer end of the first reinforcing rib is connected to the inner wall of the outer shell.
[0021] An electronic oil pump includes a base and a rotating shaft, the rotating shaft passing through the inner hole of an annular portion on the base, and the size of the bilateral clearance between the rotating shaft and the inner hole of the annular portion is in the range of 15μm-30μm.
[0022] Preferably, the electronic oil pump further includes a bearing disposed within the annular portion and sleeved on the rotating shaft.
[0023] Compared with the prior art, the present invention has the following advantages: The base body of the present invention has a mounting groove for mounting an oil pump assembly, which is used for pumping oil. An annular portion is provided on the opposite side of the bottom of the mounting groove, and the annular portion is coaxially arranged with the base body. An oil port penetrating the bottom of the mounting groove is provided, located outside the annular portion and spaced apart from it. The presence of the oil port weakens the structural strength of the groove bottom; therefore, multiple first reinforcing ribs are provided on the outer periphery of the annular portion and on the opposite side of the bottom of the mounting groove, with at least one first reinforcing rib radially positioned at the oil port to improve the structural strength at the oil port.
[0024] Because of the first reinforcing rib, the structural strength of the annular part is enhanced. Therefore, even though the shaft of the electronic oil pump is still supported by a single bearing structure, the inner hole of the annular part is not easily deformed, thus preventing the motor rotor from jamming. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the electronic oil pump in this utility model;
[0026] Figure 2 This is a cross-sectional view of the electronic oil pump of this utility model;
[0027] Figure 3 This is a top view of the base in this utility model;
[0028] Figure 4 In this utility model Figure 3 A schematic diagram of the AA-direction structure;
[0029] Figure 5 This is a structural schematic diagram of the base at the first angle in this utility model;
[0030] Figure 6 This is a structural schematic diagram of the base of the present invention from the second angle.
[0031] Among them, 1. base; 11. base body; 12. annular part; 13. mounting groove; 14. first reinforcing rib; 15. oil port; 16. outer shell; 2. external gear; 3. internal gear; 4. rotating shaft; 5. stator assembly; 7. pump cover. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.
[0035] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0038] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.
[0039] like Figures 1-6 As shown, this embodiment provides a base for use in an electronic oil pump. The bearing in the electronic oil pump is a single bearing structure, and the bearing is installed in the base.
[0040] Specifically, the base 1 includes a base body 11, one end of which is provided with a mounting groove 13 for mounting the oil pump gear, and an annular portion 12 is provided on the opposite side of the bottom of the mounting groove 13.
[0041] The annular portion 12 is coaxially arranged with the base body 11. An oil port 15 penetrating the bottom of the mounting groove 13 is provided, located on the outer side of the annular portion 12 and spaced apart from it. The base also includes a plurality of first reinforcing ribs 14, which are connected to the outer wall of the annular portion and to the opposite side of the bottom of the mounting groove 13. At least one first reinforcing rib 14 is radially inserted through the oil port 15, meaning at least one reinforcing rib 14 is radially arranged and passes through the oil port 15, but this first reinforcing rib 14 does not enter the oil port 15.
[0042] In this embodiment, the base body 11 has a mounting groove 13 for mounting an oil pump assembly, which is used for pumping oil. An annular portion 12 is provided on the opposite side of the bottom of the mounting groove 13, and the annular portion 12 is coaxially arranged with the base body 11. An oil port 15 penetrating the bottom of the mounting groove 13 is provided. This oil port 15 is located outside the annular portion 12 and spaced apart from it. The presence of the oil port 15 results in a weaker structural strength at the bottom of the groove. Therefore, multiple first reinforcing ribs 14 are provided on the outer periphery of the annular portion 12 and on the opposite side of the bottom of the mounting groove 13. At least one first reinforcing rib 14 is radially positioned at the oil port 15 to improve the structural strength at the oil port 15.
[0043] Because of the first reinforcing rib 14, the structural strength of the annular part 12 is enhanced. Even though the shaft of the electronic oil pump is still supported by a single bearing structure, the inner hole of the annular part 12 is not easily deformed. Therefore, it will not cause the motor rotor to jam.
[0044] Preferably, a plurality of first reinforcing ribs 14 are arranged radially along the annular portion 12. By providing the first reinforcing ribs 14 in the radial direction, the structural strength of the base body 11 is improved, thereby improving the structural strength of the base.
[0045] Preferably, a plurality of first reinforcing ribs 14 are evenly distributed along the circumference of the annular portion 12 to ensure the overall structural strength of the base, and the stress generated at the bottom of the mounting groove due to the setting of the first reinforcing ribs is uniform.
[0046] Preferably, the number of first reinforcing ribs 14 is 6-8, so as to ensure the structural strength of the bottom of the mounting groove 13 where the annular part 12 is located, and at the same time, the overall structural weight of the base will not increase due to the excessive number of first reinforcing ribs 14.
[0047] Preferably, the first reinforcing rib 14 has a triangular cross-section along the radial direction of the annular portion 12. This triangular cross-section ensures the structural strength of the base body 11 while minimizing the size of the first reinforcing rib 14, thereby reducing the weight of the base. Furthermore, the first reinforcing rib 14 increases the structural strength of the bottom of the mounting groove 13, allowing for a reduction in the overall thickness of the base, thus further reducing its weight. The radial cross-section at this location is the surface containing the radial and axial lines of the annular portion.
[0048] Preferably, the thickness of the first reinforcing rib 14 is 2mm-3.5mm, and the thickness direction is perpendicular to both the radial and axial directions of the annular portion 12. The thickness of the first reinforcing rib 14, 2-3.5mm, reduces the thickness of the base while ensuring structural strength, and because the base is injection molded, it also simplifies the injection molding process.
[0049] Preferably, a second reinforcing rib is provided on the opposite side of the bottom of the mounting groove. The second reinforcing rib is arranged around the outer periphery of the annular portion 12 and connected to the first reinforcing rib 14. By adding the second reinforcing rib, the overall structural strength of the base is further increased, thereby reducing the thickness of the base and making it lighter. More preferably, the second reinforcing rib is integrally formed with the first reinforcing rib 14.
[0050] Preferably, the base further includes a housing portion 16, which is arranged around the outer periphery of the annular portion 12, and one end of the housing portion 16 extends axially from the opposite side of the mounting groove. The outer end of the first reinforcing rib 14 is connected to the inner wall of the housing portion 16. That is, the first reinforcing rib 14 is simultaneously connected to the outer wall of the annular portion 12, the opposite side of the bottom of the mounting groove 13, and the inner wall of the housing portion 16.
[0051] An annular space is formed between the annular portion 12 and the outer casing portion 16, and the oil port 15 connects the mounting groove 13 and the annular space.
[0052] This embodiment also provides an electronic oil pump, which includes the aforementioned base and a rotating shaft 4. The rotating shaft 4 passes through the inner hole of the annular portion 12 on the base, and the size range of the bilateral gap between the rotating shaft 4 and the inner hole of the annular portion 12 is 15μm-30μm.
[0053] The electronic oil pump also includes an external gear 2, an internal gear 3, a stator assembly 5, and a pump cover 7. The rotating shaft 4 passes through the stator assembly 5 and is interference-fitted with the stator assembly 5. The stator assembly 5 drives the rotating shaft 4 to rotate synchronously.
[0054] The aforementioned oil pump gear includes an internal gear 3 and an external gear 2. The external gear 2 and the internal gear 3 are installed in the mounting groove 13 of the base. The internal gear 3 is interference-fitted with the rotating shaft 4. When the rotating shaft 4 rotates, it drives the internal gear 3 to rotate. The internal gear 3 and the external gear 2 mesh to pump oil, and the oil is pumped from the mounting groove 13 to the aforementioned annular space through the oil port 15.
[0055] The aforementioned double-sided gap between the rotating shaft 4 and the annular hole refers to the difference between the diameter of the inner hole of the annular part 12 and the diameter of the rotating shaft 4.
[0056] The pump cover 7 is pressed against the outer end face of the internal gear 3 to prevent the shaft 4 from moving axially. Preferably, the gap between the pump cover 7 and the end face of the shaft 4 is 50μm-70μm, and the internal gear 3 restricts the axial displacement of the shaft 4.
[0057] Preferably, the electronic oil pump also includes a bearing, which is disposed within the annular portion 12 of the base and sleeved on the rotating shaft 4.
[0058] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A base, characterized in that, Includes a base body (11), one end of which is provided with a mounting groove (13) for mounting an oil pump gear, and an annular portion (12) is provided on the opposite side of the bottom of the mounting groove (13). The annular portion (12) is coaxially arranged with the base body (11); The bottom of the mounting groove (13) is provided with an oil port (15) that penetrates the bottom of the groove. The oil port (15) is located outside the annular part (12) and is spaced apart from the annular part (12). The base also includes a plurality of first reinforcing ribs (14), which are connected to the outer wall of the annular portion (12) and the opposite side of the bottom of the mounting groove (13); At least one of the first reinforcing ribs (14) is radially inserted through the oil port (15) along the base body (11).
2. The base according to claim 1, characterized in that, Multiple first reinforcing ribs (14) are arranged radially along the annular portion (12).
3. The base according to claim 1 or 2, characterized in that, Multiple first reinforcing ribs (14) are evenly distributed along the circumference of the annular portion (12).
4. The base according to claim 1 or 2, characterized in that, The number of the first reinforcing ribs (14) is 6-8.
5. The base according to claim 1 or 2, characterized in that, The first reinforcing rib (14) has a triangular cross-section along the radial direction of the annular portion (12).
6. The base according to claim 2, characterized in that, The thickness of the first reinforcing rib (14) is 2mm-3.5mm, and the thickness direction is perpendicular to both the radial and axial directions of the annular portion (12).
7. The base according to claim 1 or 2, characterized in that, A second reinforcing rib is provided on the opposite side of the bottom of the mounting groove (13). The second reinforcing rib is arranged around the outer periphery of the annular portion (12) and is connected to the first reinforcing rib (14).
8. The base according to claim 1 or 2, characterized in that, It also includes a housing portion (16) extending axially from the opposite side of the mounting groove (13), the housing portion (16) being disposed around the annular portion (12); The outer end of the first reinforcing rib (14) is connected to the inner wall of the outer shell (16).
9. An electronic oil pump, characterized in that, The device includes a base and a rotating shaft (4) as described in any one of claims 1-8, wherein the rotating shaft (4) passes through the inner hole of the annular portion (12) on the base, and the size of the bilateral gap between the rotating shaft (4) and the inner hole of the annular portion (12) is in the range of 15μm-30μm.
10. The electronic oil pump according to claim 9, characterized in that, The electronic oil pump also includes a bearing, which is disposed within the annular portion (12) and sleeved on the rotating shaft (4).