Electronic oil pump with high oil absorption capacity

Abstract

The utility model belongs to the technical field of oil pumps, and particularly discloses an electronic oil pump with high oil absorption capacity, which comprises a pump cover, a casing, a rotating shaft, an inner rotor and an outer rotor, the pump cover and the casing are connected with each other to form an inner cavity, and the inner rotor and the outer rotor are positioned in the inner cavity. The inner rotor is coaxially connected with the rotating shaft, located on the inner side of the outer rotor and meshed with the outer rotor, end face gaps are formed between the top ends and the bottom ends of the inner rotor and the top and the bottom of the inner cavity respectively, and the end face gaps range from 0.03 mm to 0.05 mm. The utility model can solve the problem that the oil suction capacity of the oil pump is insufficient due to overlarge end surface clearance of the oil pump when the oil pump is in a semi-soaked state or a non-soaked state on the cylinder body because the position of the oil pump on the cylinder body is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil pump technical field, concretely relates to an electronic oil pump with high oil suction capacity. BACKGROUND

[0002] The inner rotor and outer rotor of the electronic oil pump and the pump cover are important working components for the oil suction capacity of the oil pump, and their structure and gap size have a decisive influence on the oil suction capacity of the oil pump. Since the inner rotor and outer rotor are rotating parts and the pump cover is a stationary part, there is a certain gap between them. When the pump is running, the size of the gap is different, which causes differences in the oil suction of the oil pump. The liquid in the low pressure area will be squeezed by the meshing of the inner rotor and outer rotor and flow to the high and low pressure areas, resulting in different pressures at both ends of the gap. The smaller the end face gap, the stronger the oil suction capacity of the oil pump. Since most of the oil pumps on the market are located at a higher position in the cylinder body, the oil pump is in a semi-soaked or non-soaked state on the cylinder body, so there is a high requirement for the end face gap. SUMMARY

[0003] The utility model provides an electronic oil pump with high oil suction capacity, which aims to solve the problem of insufficient oil suction capacity of the oil pump caused by the high position of the oil pump in the cylinder body and the semi-soaked or non-soaked state of the oil pump on the cylinder body.

[0004] The utility model discloses a kind of electronic oil pumps with high oil suction capacity, including pump cover, shell, shaft, inner rotor and outer rotor, the pump cover is connected with the shell and forms inner cavity, the inner rotor and the outer rotor are located in inner cavity, the inner rotor is coaxially connected with the shaft and is located the inner side of the outer rotor and the meshing of the outer rotor, the top of the inner rotor and the outer rotor and the top of the inner cavity have end face gap, the end face gap is 0.03-0.05mm.

[0005] Compared with prior art, the present scheme has the following advantages and beneficial effects:

[0006] When the electronic oil pump in the present scheme is located at a higher position in the cylinder body and the oil pump is in a semi-soaked or non-soaked state on the cylinder body, since the top of the inner rotor and the outer rotor and the top of the inner cavity have an end face gap in the present scheme, and the end face gap is 0.03-0.05mm, the end face gap can ensure the normal rotation of the inner rotor, and at the same time, the end face gap is very small, the cavity between the inner rotor, the outer rotor and the inner cavity formed by the pump cover and the shell is small, and the oil suction capacity is increased, so that the insufficient oil suction capacity of the oil pump can be effectively avoided.

[0007] Further, the shell and the pump cover are detachably connected.

[0008] Beneficial effects: the shell and the pump cover are convenient to disassemble and assemble, thereby facilitating the assembly of the components of the electronic oil pump and facilitating the replacement or maintenance of parts.

[0009] Further, the shell and the pump cover are provided with connecting holes arranged in mutual overlap, and the shell and the pump cover are connected by inserting fasteners into the connecting holes.

[0010] Beneficial effects: the detachable connection between the shell and the pump cover is simple and convenient to operate by the cooperation of the connecting holes and the fasteners.

[0011] Further, the connecting holes are threaded holes, and the fasteners are threadedly connected with the connecting holes.

[0012] Beneficial effects: the threaded connection of the fasteners with the threaded holes facilitates the connection or disassembly between the shell and the pump cover.

[0013] Further, the connecting holes are provided in multiple groups, and the multiple groups of connecting holes are uniformly distributed in the circumferential direction.

[0014] Beneficial effects: such arrangement can make the connection position between the shell and the pump cover more uniform, thereby improving the stability of the connection between the shell and the pump cover.

[0015] Further, the top end of the pump cover is provided with a boss, the bottom of the shell extends downwardly with an extension part, the extension part forms an assembly cavity matched with the boss, and the boss is located in the assembly cavity.

[0016] Beneficial effects: the boss arranged at the top end of the pump cover cooperates with the extension part of the shell, thereby improving the assembly precision between the pump cover and the shell.

[0017] Further, the inner side edge of the extension part of the shell is beveled.

[0018] Beneficial effects: such arrangement facilitates the beveled inner side of the extension part of the shell to guide the cooperation between the boss of the pump cover and the extension part of the shell, thereby making the assembly between the shell and the pump cover more smooth.

[0019] Further, the top edge of the boss of the pump cover is rounded.

[0020] Beneficial effects: the rounding of the top edge of the boss of the pump cover can effectively avoid contact stress and facilitate installation.

[0021] Further, a sealing groove is arranged at the top of the assembly cavity of the shell, and a sealing ring is arranged in the sealing groove.

[0022] Beneficial effects: The sealing groove in the scheme is convenient for installing the sealing ring, and the sealing ring can seal the machine cover and the pump cover.

[0023] Further, an oil storage groove is formed in the side wall of the inner cavity.

[0024] Beneficial effects: The oil storage groove can store oil, avoiding excessive oil loss. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings described herein are used to provide further understanding of the embodiments of the utility model, constitute a part of this application, and do not constitute the limitation to the embodiments of the utility model. In the drawings:

[0026] Figure 1 It is a longitudinal sectional view of the electronic oil pump embodiment with strong oil suction capacity of the utility model;

[0027] Figure 2 It is a perspective view of the electronic oil pump embodiment with strong oil suction capacity of the utility model;

[0028] Figure 3 It is an exploded schematic view of the electronic oil pump embodiment with strong oil suction capacity of the utility model;

[0029] Figure 4 It is Figure 1 The local enlarged view of A in the middle.

[0030] Markings in the drawings and corresponding names of parts:

[0031] Pump cover 1, inlet 101, outlet 102, boss 103, casing 2, extension 201, sealing groove 202, inner rotor 3, outer rotor 4, low pressure area 5, high pressure area 6, shaft 7, connecting hole 8, oil storage groove 9, pressure relief hole 10. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below by combining with the embodiments and drawings, and the illustrative embodiments of the utility model and the description are only used to explain the utility model, and not as the limitation to the utility model.

[0033] Embodiment 1

[0034] As shown in Figure 1 , Figure 2 and Figure 3 , the embodiment 1 provides an electronic oil pump with strong oil suction capacity, which comprises a pump cover 1, a casing 2, a shaft 7, an inner rotor 3 and an outer rotor 4, and the end of the pump cover 1 is provided with a pressure relief hole 10, which is convenient for pressure relief inside the oil pump, and ensures the safety in use.

[0035] The pump cover 1 is connected with the casing 2 and forms an inner cavity, the inner rotor 3 and the outer rotor 4 are located in the inner cavity, the inner rotor 3 is coaxially connected with the rotating shaft 7 and is located inside the outer rotor 4 and is engaged with the outer rotor 4, in the embodiment, the inlet 101 of the pump cover 1 forms a low pressure area 5 with the space between the inner rotor 3 and the outer rotor 4, the outlet 102 of the pump cover 1 forms a high pressure area 6 with the space between the inner rotor 3 and the outer rotor 4, the electronic oil pump uses the toothed engagement between the inner rotor 3 and the outer rotor 4 to form high and low pressure areas, so that the liquid in the low pressure area 5 is squeezed to the high pressure area 6 through the toothed engagement between the inner rotor 3 and the outer rotor 4.

[0036] In the embodiment, the top end of the inner rotor 3 and the outer rotor 4 has an end face gap with the top of the inner cavity, that is, the inner rotor 3 and the outer rotor 4 have an end face gap of 0.03-0.05mm.

[0037] As shown in the drawings, in the embodiment, an oil storage groove 9 is formed on the side wall of the inner cavity, the oil storage groove 9 is a ring groove structure, and the oil storage groove 9 can avoid excessive oil loss and play a role in storing oil. Figure 1 The specific implementation process is as follows: in the embodiment, the inner rotor 3, the outer rotor 4, the casing 2 and the pump cover 1 are gap-fitted, the depth of the inner cavity and the depth of the inner rotor 3 and the outer rotor 4 have a certain height difference, which ensures that the end face gap is small, so that the cavity between the inner rotor 3 and the outer rotor 4 and the inner cavity formed by the pump cover 1 and the casing 2 is small, the oil absorption capacity is increased, and the problem of insufficient oil absorption capacity of the electronic oil pump due to the high position of the oil pump in the cylinder body and the semi-submerged or non-submerged state of the electronic oil pump on the cylinder body can be solved.

[0038] Embodiment 2

[0039] As shown in the drawings, the difference between the embodiment and embodiment 1 is that the casing 2 and the pump cover 1 are detachably connected, the casing 2 and the pump cover 1 are both provided with connection holes 8 which are arranged in overlapping relationship, that is, the casing 2 and the pump cover 1 are both provided with connection holes 8, the connection holes 8 on the casing 2 and the pump cover 1 are arranged in corresponding relationship, and the casing 2 and the pump cover 1 are connected by inserting a fastener into the connection holes 8.

[0040] Figure 1 In the embodiment, the connection hole 8 is a threaded hole, the fastener is screwed into the connection hole 8, the fastener in the embodiment is a screw or a bolt, and the casing 2 and the pump cover 1 can be connected and fixed by screwing the fastener into the corresponding connection holes 8 on the casing 2 and the pump cover 1.

[0041] As shown in the drawings, the difference between the embodiment and embodiment 1 is that the casing 2 and the pump cover 1 are detachably connected, the casing 2 and the pump cover 1 are both provided with connection holes 8 which are arranged in overlapping relationship, that is, the casing 2 and the pump cover 1 are both provided with connection holes 8, the connection holes 8 on the casing 2 and the pump cover 1 are arranged in corresponding relationship, and the casing 2 and the pump cover 1 are connected by inserting a fastener into the connection holes 8.

[0042] As shown in the drawings, the difference between the embodiment and embodiment 1 is that the casing 2 and the pump cover 1 are detachably connected, the casing 2 and the pump cover 1 are both provided with connection holes 8 which are arranged in overlapping relationship, that is, the casing 2 and the pump cover 1 are both provided with connection holes 8, the connection holes 8 on the casing 2 and the pump cover 1 are arranged in corresponding relationship, and the casing 2 and the pump cover 1 are connected by inserting a fastener into the connection holes 8. Figure 2 ​As shown, in this embodiment, multiple sets of connection holes 8 are provided, and these multiple sets of connection holes 8 are evenly distributed circumferentially. This improves the stability and firmness of the connection between the housing 2 and the pump cover 1. After the pump cover 1 and the housing 2 are fastened together, the installation and fastening are completed by sequentially screwing fasteners into the corresponding sets of connection holes 8 on the housing 2 and the pump cover 1.

[0043] Example 3

[0044] Combination Figure 3 As shown, the difference between this embodiment and embodiment 1 is that: the top of the pump cover 1 is provided with a boss 103, the boss 103 and the pump cover 1 form a stepped structure. In this embodiment, the boss 103 and the pump cover 1 are integrally formed. The bottom of the housing 2 extends downward with an extension 201, the extension 201 and the housing 2 are integrally formed. The extension 201 forms an assembly cavity that cooperates with the boss 103, and the boss 103 is located in the assembly cavity.

[0045] After the extension 201 at the bottom of the housing 2 covers the boss 103, the boss 103 is located in the assembly cavity. The housing 2 and pump cover 1 are then connected and secured with fasteners to complete the assembly between them. In this design, the boss 103 on the pump cover 1 and the extension 201 at the bottom of the housing 2 cooperate with each other, improving the accuracy of their assembly.

[0046] Combination Figure 4 As shown, in this embodiment, the inner edge of the extension portion 201 of the housing 2 is chamfered, and the top edge of the boss 103 of the pump cover 1 is rounded. With this setting, the chamfer and rounded corners can guide the assembly of the housing 2 and the pump cover 1, making the assembly process of the housing 2 and the pump cover 1 smoother, more convenient and more precise.

[0047] Example 4

[0048] like Figure 4 As shown, the difference between this embodiment and embodiment 3 is that: in this embodiment, an annular sealing groove 202 is opened at the top of the assembly cavity of the housing 2, and a sealing ring is provided in the sealing groove 202. With this arrangement, when the extension 201 of the housing 2 covers the boss 103 on the top of the pump cover 1, it can be sealed by the sealing ring installed in the sealing groove 202, thereby ensuring the sealing performance between the pump cover 1 and the housing 2 after assembly and avoiding oil leakage.

[0049] It is to be understood that the embodiments that have been described above are merely illustrative of the principles of the application. Numerous modifications can be made to the application described without departing from the scope of the application as defined in the appending claims. Accordingly, the application is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high oil absorption capacity electronic oil pump, comprising a pump cover, a casing, a rotating shaft, an inner rotor and an outer rotor, the pump cover and the casing are connected to each other and form an inner cavity, the inner rotor and the outer rotor are located in the inner cavity, the inner rotor is coaxially connected with the rotating shaft and is located inside the outer rotor and engaged with the outer rotor, characterized in that, The top end of the inner rotor and the outer rotor and the top of the inner cavity have an end face gap of 0.03-0.05mm.

2. The electronic oil pump with high oil absorption capacity according to claim 1, wherein The machine shell and the pump cover are detachably connected.

3. The electronic oil pump with high oil absorption capacity according to claim 2, characterized in that, The machine shell and the pump cover are provided with connecting holes arranged in mutual overlap, and the machine shell and the pump cover are connected by inserting fasteners into the connecting holes.

4. The electronic oil pump with high oil absorption capacity according to claim 3, characterized in that, The connecting holes are threaded holes, and the fasteners are threadedly connected with the connecting holes.

5. The electronic oil pump with high oil absorption capacity according to claim 3, characterized in that, The connecting holes are provided in multiple groups, and the multiple groups of connecting holes are uniformly distributed in the circumferential direction.

6. The electronic oil pump with high oil absorption capacity according to any one of claims 1-5, characterized in that, The top end of the pump cover is provided with a boss, the bottom of the machine shell extends downwardly with an extension part, the extension part forms an assembly cavity matched with the boss, and the boss is located in the assembly cavity.

7. The electronic oil pump with high oil absorption capacity according to claim 6, characterized in that, The inner side edge of the extension part of the machine shell is beveled.

8. The electronic oil pump with high oil absorption capacity according to claim 7, characterized in that, The top edge of the boss of the pump cover is rounded.

9. The electronic oil pump with high oil absorption capacity according to claim 6, characterized in that, The top of the assembly cavity of the machine shell is provided with a ring of sealing grooves, and the sealing grooves are provided with sealing rings.

10. The electronic oil pump with high oil absorption capacity according to claim 1, wherein An oil storage groove is formed in the side wall of the inner cavity.

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