Shielding cover and electronic water pump

Abstract

The embodiment of the utility model provides a shielding case and an electronic water pump, and relates to the field of water pump structures. The shielding cover is used for being arranged on the periphery of a rotor in a sleeving mode so that a cavity used for containing cooling liquid can be formed between the shielding cover and the rotor, and a flow guiding part is formed on the inner wall of the shielding cover and used for guiding the cooling liquid. When the electronic water pump works, the rotor is sleeved with the shielding cover so as to separate the rotor from the stator, the spiral flow guide part has a flow guide effect on cooling liquid, flowing of the cooling liquid is accelerated so as to improve the heat dissipation effect, excessive heat is prevented from being accumulated around the stator and the rotor, elements are prevented from being overheated, and therefore the operation efficiency of the electronic water pump is improved, and the service life of the electronic water pump is prolonged. The electronic water pump comprises a shell, a rotor, a stator and a shielding cover, wherein the shielding cover is arranged on the outer side of the rotor and located on the inner side of the stator, a cavity used for containing cooling liquid is formed between the shielding cover and the rotor, the shielding cover, the rotor and the stator are all contained in the shell, and the electronic water pump has all functions of the shielding cover.

Description

Technical Field

[0001] The utility model relates to the field of water pump structures, in particular to a shielding cover and an electronic water pump. Background Art

[0002] Existing electronic water pumps usually install a shielding cover between the inner side of the stator and the outer side of the rotor to serve as a barrier.

[0003] However, the installation of the shield will have a negative impact on the heat dissipation effect, causing excessive heat to accumulate around the stator and rotor, which in turn causes the components to overheat, affecting the operating efficiency and life of the electronic water pump. Utility Model Content

[0004] The utility model provides a shielding cover and an electronic water pump, which can improve the heat dissipation effect, avoid excessive heat accumulation around the stator and the rotor, prevent components from overheating, and thus improve the operating efficiency and service life of the electronic water pump.

[0005] The embodiment of the present utility model can be implemented as follows:

[0006] An embodiment of the present invention provides a shielding cover, which includes:

[0007] The shielding cover is used to be sleeved on the outer circumference of the rotor to form a chamber for accommodating coolant between the shielding cover and the rotor. The inner wall of the shielding cover is formed with a guide portion, and the guide portion is used to guide the coolant.

[0008] Optionally, the guide portion is spiral-shaped and is a guide rib protruding from the inner wall of the shielding cover.

[0009] Optionally, the guide portion is spiral-shaped and is a guide groove opened on the inner wall of the shielding cover.

[0010] Optionally, a positioning portion is formed on an outer wall of the shielding cover, and the positioning portion is used to cooperate with the stator.

[0011] Optionally, the positioning portion includes a positioning rib, and the positioning rib is used to be arranged in a spacing area of ​​the stator and abut against the stator.

[0012] Optionally, the number of the positioning ribs is at least three, the positioning ribs extend along the axial direction of the shielding cover, and at least three positioning ribs are evenly distributed about the central axis of the shielding cover.

[0013] Optionally, a guiding slope is formed at the front end of the positioning rib.

[0014] Optionally, the shielding cover includes a cover body and a back seat connected to each other, the inner diameter of the back seat is larger than the inner diameter of the cover body, the cover body is used to be sleeved on the rotor, and the back seat is used to accommodate a sealing ring.

[0015] Optionally, a limiting step is formed at the connection between the cover body and the rear seat, and the limiting step is used to support the sealing ring.

[0016] The embodiment of the present utility model further provides an electronic water pump, comprising a housing, a rotor, a stator and the shielding cover;

[0017] The shielding cover is arranged on the outside of the rotor and located on the inside of the stator. A chamber for accommodating coolant is formed between the shielding cover and the rotor. The shielding cover, the rotor and the stator are all accommodated in the cavity of the shell.

[0018] The beneficial effects of the shielding cover and the electronic water pump of the embodiment of the present utility model include, for example:

[0019] The shield is designed to fit over the outer periphery of the rotor, forming a chamber for containing coolant between the rotor and the shield. The shield's inner wall is formed with a guide portion for directing the coolant. During operation, the shield fits over the rotor, separating the rotor and stator. The guide portion guides the coolant, accelerating its flow and improving heat dissipation. This prevents excessive heat accumulation around the stator and rotor, preventing component overheating and thereby increasing the efficiency and lifespan of the electronic water pump.

[0020] The electronic water pump includes a housing, a rotor, a stator and a shielding cover; wherein the shielding cover is arranged on the outside of the rotor and located on the inside of the stator, a chamber for accommodating coolant is formed between the shielding cover and the rotor, and the shielding cover, rotor and stator are all accommodated in the cavity of the housing. The electronic water pump has all the functions of the shielding cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic structural diagram of a shielding cover provided in an embodiment of the present utility model;

[0023] Figure 2 A schematic diagram of the internal structure of the electronic water pump provided in an embodiment of the present utility model;

[0024] Figure 3 This is a schematic diagram of the external structure of the electronic water pump provided in an embodiment of the present utility model.

[0025] Icons: 100-shielding cover; 112-cover body; 114-rear seat; 116-limiting step; 130-flow guide; 150-positioning part; 152-positioning rib; 1521-guide slope; 200-housing; 300-rotor; 400-stator; 1000-electronic water pump. DETAILED DESCRIPTION

[0026] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0027] 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 rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are intended to fall within the scope of protection of the present invention.

[0028] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0029] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first", "second", etc., if used, are merely used to distinguish and describe, and should not be understood as indicating or implying relative importance.

[0031] The terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0032] Unless otherwise expressly specified or limited, terms such as "disposed" and "connected" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0033] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other.

[0034] As mentioned in the background, existing electronic water pumps typically install a shield between the inner side of the stator and the outer side of the rotor to provide insulation. However, the installation of the shield can negatively impact heat dissipation, causing excessive heat to accumulate around the stator and rotor, leading to component overheating and reducing the operating efficiency and lifespan of the electronic water pump.

[0035] Please refer to Figure 1-Figure 3 The shielding cover 100 and the electronic water pump 1000 provided in the embodiment of the present invention can solve the above problems, which will be described in detail below.

[0036] refer to Figure 1 and Figure 2 The shielding cover 100 is used to be sleeved on the outer periphery of the rotor 300 to form a chamber for accommodating the coolant between the shielding cover 100 and the rotor 300. The inner wall of the shielding cover 100 is formed with a guide portion 130, which is used to guide the coolant.

[0037] During operation, the shielding cover 100 is mounted on the rotor 300 to separate the rotor 300 and the stator 400, and the guide portion 130 guides the coolant, accelerating the flow of the coolant to improve the heat dissipation effect, avoiding excessive heat accumulation around the stator 400 and the rotor 300, and preventing components from overheating, thereby improving the operating efficiency and life of the electronic water pump 1000.

[0038] Specifically, the shielding cover 100 includes a cover body 112 , and the air guide portion 130 is formed on the inner side of the cover body 112 .

[0039] In this embodiment, because the rotor 300 rotates continuously during operation, in order to facilitate the flow of coolant and avoid local accumulation of coolant, the cover body 112 can be made into a cylindrical shape with openings at both ends, the rotor 300 is located on the inner side of the cylinder of the cover body 112, and the stator 400 is located on the outer side of the cylinder of the cover body 112.

[0040] Furthermore, in order to prevent damage caused by sharp corners at the corners of the cover body 112 , the corners of the cover body 112 may be rounded to prevent accidental damage to other components.

[0041] It is worth noting that the guide portion 130 is spirally shaped, allowing the guide portion 130 to be a guide rib, which is provided along the inner wall of the cover 112 in a spiral direction. When the coolant flows within the cover 112, the rotation of the rotor 300 drives the coolant to rotate as well. The spiral guide rib can guide the rotating coolant, causing it to move along the guide rib and then flow along the axial direction of the cover 112 while rotating, thereby increasing the flow rate of the coolant and improving the heat dissipation effect.

[0042] Of course, the guide portion 130 can also be a guide groove, which is opened on the inner wall of the cover body 112 along a spiral direction; similarly, when the coolant flows in the cover body 112, the rotation of the rotor 300 will drive the coolant to rotate, and the spiral guide groove can guide the coolant in the rotating state, causing it to move along the guide groove, and then flow along the axial direction of the cover body 112 while rotating, thereby increasing the flow rate of the coolant and thus improving the heat dissipation effect.

[0043] It should be noted that when providing the spiral guide rib, it can be integrally formed with the cover body 112; or it can be a separate structure from the cover body 112. After the cover body 112 is formed, the guide rib is fixed to the inner wall of the cover body 112. The guide rib can be bonded, welded, riveted, or threaded to the cover body 112. The specific connection method between the two is not limited. In addition, the guide rib and the guide groove can be continuous or discontinuous spiral.

[0044] refer to Figure 1 and Figure 2 In order to improve the positioning effect of the shielding cover 100 and prevent it from rotating due to the rotational force generated by the rotor 300 on the coolant in the working state, a positioning portion 150 can be formed on the outer wall of the shielding cover 100, and the positioning portion 150 is used to cooperate with the stator 400.

[0045] Specifically, the positioning portion 150 is formed on the outer wall of the housing 112 and includes at least two positioning ribs 152. The at least two positioning ribs 152 extend axially along the housing 112 and are spaced apart circumferentially around the housing 112. When installed, the stator 400 has a spacing area formed therein, and the positioning ribs 152 can be accommodated within the spacing area. The positioning ribs 152 abut against the stator 400, thereby improving the relative positional stability of the stator 400.

[0046] Furthermore, to enhance the connection stability between the positioning rib 152 and the housing 112, the bottom portions of the two sides of the positioning rib 152 can be curved where they connect to the housing 112, thereby increasing the connection area and improving connection stability. Furthermore, to prevent damage from the sharp corners on the top portions of the two sides of the positioning rib 152, these corners can be rounded to prevent accidental damage to other components.

[0047] refer to Figure 1 In order to further improve the positioning stability of the cover body 112 and ensure that the force on the cover body 112 in the circumferential direction is balanced, the number of positioning ribs 152 can be at least three, and at least three positioning ribs 152 are evenly distributed about the central axis of the cover body 112.

[0048] In this embodiment, the number of positioning ribs 152 is twelve, and the size of the central angle formed between each two adjacent positioning ribs 152 is 30°; of course, in other embodiments of the present invention, the number of positioning ribs 152 can also be three, six, nine, ten, etc., and the size of the central angle formed between each two adjacent positioning ribs 152 can also be 120°, 60°, 40°, 36°, etc. There is no limitation on the specific number of positioning ribs 152 and the size of the central angle between adjacent positioning ribs 152.

[0049] refer to Figure 1 Because the cover 112 is typically installed from the rear end to the front end, a guide slope 1521 can be formed at the front end of the positioning rib 152 to facilitate installation. The distance between the guide slope 1521 and the inner wall of the cover 112 gradually decreases as it approaches the front end. The guide slope 1521 can provide a guiding effect during installation, thereby improving installation efficiency. Furthermore, a certain distance exists between the front end of the positioning rib 152 and the front end of the cover 112.

[0050] refer to Figure 1 While providing a shielding effect, in order to facilitate connection and coordination with other components, the shielding cover 100 can include a connected cover body 112 and a rear seat 114. The inner diameter of the rear seat 114 is larger than the inner diameter of the cover body 112. The cover body 112 is used to be sleeved on the rotor 300, and the rear seat 114 is used to accommodate the sealing ring.

[0051] Furthermore, in order to prevent the accommodated sealing ring from being displaced axially along the rear seat 114 , a limiting step 116 may be formed at the connection between the cover body 112 and the rear seat 114 . The limiting step 116 is used to support the sealing ring, thereby improving the position stability of the sealing ring.

[0052] It is worth noting that in order to improve the structural stability of the positioning rib 152 , the rear end of the positioning rib 152 may be connected to the rear seat 114 , thereby helping to improve the structural strength of the shielding cover 100 .

[0053] refer to Figure 2 and Figure 3 The present invention also provides an electronic water pump 1000, comprising the aforementioned shielding cover 100, a housing 200, a rotor 300, and a stator 400. The cover 112 is disposed outside the rotor 300 and inside the stator 400, and the cover 112, the rotor 300, and the stator 400 are all housed within the cavity of the housing 200. The electronic water pump 1000 includes the shielding cover 100 and has all the functions of the shielding cover 100.

[0054] In order to achieve relative rotation between different components, a front bearing seat and a rear bearing seat can be installed at the opening positions at both ends of the cover body 112 respectively, the rear bearing seat is connected to the rear seat 114, and the front bearing seat is connected to the front end of the cover body 112.

[0055] In summary, the shielding cover 100 and the electronic water pump 1000 provided by the embodiments of the present invention have at least the following advantages:

[0056] (1) The shielding cover 100 can guide the coolant between the cover body 112 and the rotor 300 through the spiral guide portion 130, accelerate the flow of the coolant to improve the heat dissipation effect, avoid excessive heat accumulation around the stator 400 and the rotor 300, prevent components from overheating, and thus improve the operating efficiency and life of the electronic water pump 1000.

[0057] (2) The shielding cover 100 is provided with a positioning portion 150 on the outer wall, and the positioning portion 150 is matched with the stator 400, thereby improving the positioning effect of the shielding cover 100 and preventing it from rotating due to the rotational force generated by the rotor 300 on the coolant in the working state.

[0058] (3) The shielding cover 100 can further improve the positioning stability of the cover body 112 and ensure the balanced force of the cover body 112 in the circumferential direction by providing at least three positioning ribs 152 and making the at least three positioning ribs 152 evenly distributed about the central axis of the cover body 112.

[0059] (4) The shielding cover 100 is provided with a guiding slope 1521 at the front end of the positioning rib 152, and the distance between the guiding slope 1521 and the cover body 112 gradually decreases in the direction approaching the front end, thereby facilitating the guiding slope 1521 to play a guiding role during the installation process, thereby improving the installation efficiency.

[0060] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A shielding cover, characterized in that: The shielding cover is used to be sleeved on the outer periphery of the rotor (300) to form a chamber for accommodating cooling liquid between the shielding cover and the rotor (300). The inner wall of the shielding cover is formed with a guide portion (130), and the guide portion (130) is used to guide the cooling liquid.

2. The shielding cover according to claim 1, wherein: The guide portion (130) is spiral-shaped and is a guide rib convexly arranged on the inner wall of the shielding cover.

3. The shielding cover according to claim 1, wherein: The guide portion (130) is spiral-shaped, and the guide portion (130) is a guide groove opened on the inner wall of the shielding cover.

4. The shielding cover according to any one of claims 1 to 3, characterized in that: A positioning portion (150) is formed on the outer wall of the shielding cover for cooperating with the stator (400).

5. The shielding cover according to claim 4, wherein: The positioning portion (150) includes a positioning rib (152), and the positioning rib (152) is used to be arranged in a spacing area of ​​the stator (400) and to abut against the stator (400).

6. The shielding cover according to claim 5, wherein: The number of the positioning ribs (152) is at least three, the positioning ribs (152) extend along the axial direction of the shielding cover, at least three positioning ribs (152) are arranged at intervals along the circumference of the shielding cover, and the at least three positioning ribs (152) are evenly distributed about the central axis of the shielding cover.

7. The shielding cover according to claim 5, wherein: A guiding inclined surface (1521) is formed at the front end of the positioning rib (152).

8. The shielding cover according to any one of claims 1 to 3, characterized in that: The shielding cover comprises a cover body (112) and a rear seat (114) connected to each other. The inner diameter of the rear seat (114) is larger than the inner diameter of the cover body (112). The cover body (112) is used to be sleeved on the rotor (300), and the rear seat (114) is used to accommodate a sealing ring.

9. The shielding cover according to claim 8, wherein: A limiting step (116) is formed at the connection between the cover body (112) and the rear seat (114), and the limiting step (116) is used to resist the sealing ring.

10. An electronic water pump, characterized in that: include: A housing (200), a rotor (300), a stator (400), and a shielding cover according to any one of claims 1 to 9; The shielding cover is arranged on the outside of the rotor (300) and located on the inside of the stator (400), a chamber for accommodating cooling liquid is formed between the shielding cover and the rotor (300), and the shielding cover, the rotor (300) and the stator (400) are all accommodated in the cavity of the housing (200).

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