Rotor thrust part structure and electronic water pump with rotor thrust part structure

Abstract

The utility model discloses a rotor thrust piece structure and an electronic water pump with the rotor thrust piece structure, which comprise a fixed outer sleeve, a first inner space, a second inner space and a rotor thrust piece, the elastic gasket is made of metal and arranged in the first inner space, one side of the elastic gasket makes contact with the end plate, a second inner space is formed in the middle of the elastic gasket, and the rotating shaft is surrounded by the second inner space; one end of the gasket is arranged in the first inner space and between the fixing outer sleeve and the elastic gasket, the other end of the gasket penetrates out of the first inner space and protrudes out of the fixing outer sleeve, a third inner space is formed in the middle of the gasket, the third inner space is communicated with the second inner space, and the rotating shaft surrounds the third inner space; therefore, the technical problems that the assembling operation is inconvenient and the service life is relatively short are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic water pumps, in particular to a rotor thrust piece structure and an electronic water pump with the rotor thrust piece structure. Background Art

[0002] Automotive electronic water pumps are widely used. In traditional fuel vehicles, they are primarily used in the engine cooling system to achieve more precise temperature control and higher energy efficiency. In new energy vehicles, electronic water pumps are not only an important component of the cooling system, but also serve to manage the thermal performance of battery packs, motors, and power electronics.

[0003] The structure of an automotive electronic water pump generally includes: a motor housing, a stator assembly, a rotor assembly, a front bearing, a rear bearing, a front cover, a rear cover, a pump housing, an impeller and other structures; the stator assembly is connected to the motor housing; the front bearing is connected to the front cover; the rear bearing is connected to the motor housing; the rotor assembly is arranged in the stator assembly and connected between the front bearing and the rear bearing; the front cover and the rear cover are respectively fixedly connected to the motor housing; the pump housing is connected to the front cover and the motor housing; the impeller is connected to the rotating shaft on the rotor assembly, arranged in the pump housing, and rotates with the rotor assembly;

[0004] The rotor assembly includes: a rotating shaft connected to the front bearing and the rear bearing; a rotor core connected around the rotating shaft; a magnet connected to the rotor core; an end plate connected to the rotating shaft, with one side of the end plate attached to the rotor core; and a thrust assembly connected to the rotating shaft and disposed between the end plate and the front bearing.

[0005] The main function of the thrust assembly is to prevent the rotor assembly from moving forward (the axial force generated when the electronic water pump is running will cause the rotor assembly to move forward), avoid collision between the impeller at the front end of the rotor assembly and the pump casing, resulting in wear between the impeller and the pump casing, thereby affecting the service life of the electronic water pump. In severe cases, the electronic water pump will stop working.

[0006] The thrust assembly in the prior art generally includes: an elastic member made of rubber and an anti-friction member made of ceramic. In actual use, there are some shortcomings:

[0007] 1. Due to the constant changes in the ambient temperature and coolant temperature, the rubber elastic parts will age and deform after a period of use, affecting the life of the electronic water pump;

[0008] 2. The rubber material cannot meet the strength requirements of high-power electronic water pumps. The axial force generated by high-power electronic water pumps during operation is relatively large. During the operation of the electronic water pump, the medium in the pump casing will exert an axial force of 100 Nm on the thrust assembly. Under the action of such a large axial force, the strength of the rubber material itself cannot meet the requirements, thus shortening the life of the electronic water pump.

[0009] 3. The thrust assembly and the rotating shaft are fixed in a tight fit manner, and lubricating fluid is required during assembly to complete the assembly. The assembly operation is inconvenient and increases production costs. Utility Model Content

[0010] In view of the above-mentioned deficiencies in the related art, an object is to provide a rotor thrust member structure and an electronic water pump having the same, so as to solve the technical problems of inconvenient assembly operation and relatively short service life in the related art;

[0011] The technical solution to achieve the purpose is: a rotor thrust member structure, comprising:

[0012] a fixed outer sleeve connected to the end plate, and having a first inner space therein;

[0013] An elastic gasket, made of metal, is disposed in the first inner space, one side of the gasket contacts the end plate, and a second inner space is defined in the middle of the gasket, the second inner space surrounds the rotating shaft;

[0014] And a liner, one end of which is arranged in the first inner space and between the fixed sleeve and the elastic gasket, and the other end passes through the first inner space and protrudes from the fixed sleeve, and the middle position of the liner has a third inner space, the third inner space is connected to the second inner space, and the third inner space surrounds the rotating shaft.

[0015] Further: the fixed jacket includes: a main body;

[0016] a side flange connected to one end of the main body and used for connecting to the end plate;

[0017] and a bent rib connected to the other end of the main body, forming the first inner space between the side convex edge and the main body, and the bent rib is used to block the liner.

[0018] Further: the main body is a cylindrical structure;

[0019] The side convex edge is a circular plate-shaped structure, the middle position of which is connected to one end of the main body, and the edge is away from the main body;

[0020] The bent rib starts from the connection with the main body and bends along an arc toward the center straight line of the main body. The first stepped inner space is formed between the bent rib, the side convex edge and the main body.

[0021] Further: the elastic gasket is a corrugated gasket;

[0022] The elastic gasket has a plurality of crests and a plurality of troughs;

[0023] The wave crests are spaced apart from each other, the wave troughs are spaced apart from each other, and the wave crests are connected to the wave troughs.

[0024] Furthermore: the straight-line distance x between the wave crest and the wave trough is 2 mm to 4 mm;

[0025] The wall thickness dimension y at the wave crest or the wave trough is 0.3 mm to 0.8 mm.

[0026] Further: the material of the liner is ceramic;

[0027] The liner comprises: a first portion disposed between the fixed outer sleeve and the elastic gasket; and a second portion, one end of which is connected to the first portion and the other end of which passes through the first inner space;

[0028] The third inner space is located between the first part and the second part.

[0029] Furthermore: the first part is a circular plate-shaped structure;

[0030] The second part is a circular plate-shaped structure;

[0031] The center line of the first portion and the center line of the second portion are collinear;

[0032] The outer diameter of the first portion is greater than the outer diameter of the second portion.

[0033] Furthermore: the other end of the second part is also provided with a plurality of arc-shaped grooves, the arc-shaped grooves are arranged at intervals, and the arc-shaped grooves start from the third inner space and pass through the outer circle of the second part.

[0034] Furthermore: when the second inner space is passed through by the rotating shaft, a first gap is formed between the rotating shaft and the elastic gasket;

[0035] When the rotating shaft passes through the third inner space, a second gap is formed between the rotating shaft and the liner.

[0036] An electronic water pump with a rotor thrust member structure comprises: an end plate; a rotating shaft; and a front bearing; and further comprises: the rotor thrust member structure described above;

[0037] The fixed sleeve is connected to the end plate;

[0038] The elastic gasket and the liner surround the rotating shaft and are provided with a gap therebetween;

[0039] When the electronic water pump is in operation, the gasket contacts the front bearing;

[0040] When the electronic water pump stops operating, a third gap is provided between the gasket and the front bearing.

[0041] The above technical solution has the following beneficial effects: a rotor thrust member structure and an electronic water pump having the rotor thrust member structure, compared with the related art, are provided with a fixed outer sleeve, an elastic gasket and a liner;

[0042] The elastic gasket and liner are connected to the fixed jacket to form a relative whole, and then the fixed jacket is connected to the end plate, and the assembly operation is relatively convenient;

[0043] The elastic gasket is made of metal, with relatively high structural strength and relatively long service life;

[0044] The second inner space on the elastic gasket and the third inner space on the liner are sleeved on the rotating shaft. Compared with the tight-fitting fixing method used in the prior art, the assembly operation is relatively convenient.

[0045] Thus, the technical problems of inconvenient assembly operation and relatively short service life are overcome, and the technical effects of relatively convenient assembly operation and relatively long service life are achieved, which is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 A schematic diagram of the structure of the fixed outer sleeve, elastic gasket and liner after they are assembled and connected to the end plate;

[0047] Figure 2 It is a partial cross-sectional view of the assembled fixed sleeve, elastic gasket and liner;

[0048] Figure 3 A schematic diagram of the structure for fixing the jacket;

[0049] Figure 4 A partial cross-sectional view of a fixed jacket;

[0050] Figure 5 Schematic diagram of the structure of the elastic gasket;

[0051] Figure 6 It is the left view of the elastic gasket;

[0052] Figure 7 is a schematic diagram of the structure of the liner;

[0053] Figure 8 is a structural diagram of the end plate;

[0054] In the figure: 10. Fixed outer shell, 11. First inner space, 10-1. Main body, 10-2. Side convex edge, 10-3. Bent rib,

[0055] 20. Elastic gasket, 21. Second inner space, 20-1. Wave crest, 20-2. Wave trough, 30. Liner, 31. Third inner space, 30-1. First part, 30-2. Second part, 30-21. Arc-shaped groove, 100. End plate, 101. End face, 200. Rotating shaft, 300. Front bearing, 400. Rotor core, 500. Magnet. DETAILED DESCRIPTION

[0056] In order to make the content easier to understand, the following is a further detailed description based on specific embodiments and in conjunction with the accompanying drawings;

[0057] A rotor thrust member structure and an electronic water pump having the same solve the technical problems of inconvenient assembly and relatively short service life in related technologies. The structure can be manufactured and used, achieving the positive effects of relatively convenient assembly and relatively long service life. The overall concept is as follows:

[0058] One implementation method:

[0059] like Figure 1 、 Figure 2 、 Figure 8 As shown; A rotor thrust member structure and an electronic water pump having a rotor thrust member structure, the rotor thrust member structure comprising:

[0060] A fixed outer sleeve 10, wherein the fixed outer sleeve 10 is connected to the end plate 100 and defines a first inner space 11;

[0061] An elastic gasket 20 made of metal is disposed in the first inner space 11 , with one side in contact with the end plate 100 , and a second inner space 21 is defined in the middle of the elastic gasket 20 , and the second inner space 21 surrounds the rotating shaft 200 ;

[0062] and a liner 30, one end of which is disposed in the first inner space 11 and between the fixed outer sleeve 10 and the elastic gasket 20, and the other end of which passes through the first inner space 11 and protrudes from the fixed outer sleeve 10, and a third inner space 31 is defined in the middle of the liner 30, the third inner space 31 being connected to the second inner space 21, and the third inner space 31 surrounds the rotating shaft 200;

[0063] Specifically, during implementation, the elastic gasket 20 and the liner 30 are connected to the first inner space 11 on the fixed outer sleeve 10 to form a relative whole, and then the fixed outer sleeve 10 is connected to the end plate 100, and the assembly operation is relatively convenient;

[0064] The elastic gasket 20 is made of metal, which has a relatively high structural strength and a relatively long service life;

[0065] The second inner space 21 of the elastic gasket 20 and the third inner space 31 of the liner 30 are sleeved on the rotating shaft 200. The elastic gasket 20 and the liner 30 are respectively provided with a gap (the gap setting is interpreted as a clearance fit) between the elastic gasket 20 and the liner 30 and the rotating shaft 200. Compared with the tight fit fixing method used in the prior art, the assembly operation is relatively convenient.

[0066] The electronic water pump with a rotor thrust member structure includes: an end plate 100; a rotating shaft 200; and a front bearing 300; and further includes: the rotor thrust member structure;

[0067] The fixed sleeve 10 is connected to the end plate 100;

[0068] The elastic gasket 20 and the liner 30 surround the rotating shaft 200 and are provided with a gap therebetween;

[0069] When the electronic water pump is in operation, the gasket 30 contacts the front bearing 300;

[0070] When the electronic water pump stops running, a third gap is formed between the gasket 30 and the front bearing 300;

[0071] The electronic water pump with a rotor thrust member structure further includes: a rotor core 400, a magnet 500, a motor housing, a stator assembly, a rear bearing, a front cover, a rear cover, a pump housing, an impeller and other structures;

[0072] The end plate 100 has an end surface 101;

[0073] The end plate 100, rotating shaft 200, front bearing 300, rotor core 400, magnet 500, motor housing, stator assembly, rear bearing, front cover, rear cover, pump housing, and impeller are commonly used structures in the prior art and are common knowledge. After reading the disclosed content, a person of ordinary skill in the art can directly and unambiguously know how to arrange them without any creative effort or excessive experimentation.

[0074] The end plate 100, the rotating shaft 200, the rotor core 400, the magnet 500 and the rotor thrust member are assembled to form a rotor assembly;

[0075] When the electronic water pump is running, an axial force is generated. The liner 30 on the rotor thrust member structure is pressed against the front bearing 300 to form a support, and the elastic gasket 20 forms an elastic buffer, which has the function of unloading the force, so that the rotor assembly will not move forward, and the probability of collision between the impeller at the front end of the rotor assembly and the pump casing is reduced. The structural reliability is relatively good and the service life is relatively long.

[0076] When the electronic water pump stops running, a third gap is provided between the liner 30 and the front bearing 300. The third gap provides a buffer distance. When the electronic water pump generates axial force during operation, the liner 30 will not get stuck in the front bearing 300. The structural reliability is relatively good and the service life is relatively long.

[0077] Another embodiment:

[0078] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 8 As shown; in implementation, the fixed jacket 10 includes: a main body 10-1; a side flange 10-2 connected to one end of the main body 10-1; and a bent rib 10-3 connected to the other end of the main body 10-1, forming the first inner space 11 between the side flange 10-2 and the main body 10-1, and the bent rib 10-3 is used to block the liner 30;

[0079] The main body 10-1 is a cylindrical structure; the side flange 10-2 is a circular plate-shaped structure, connected to one end of the main body 10-1 at the middle position, and away from the main body 10-1 at the edge; the bent rib 10-3 starts from the connection with the main body 10-1 and bends along an arc toward the center straight line of the main body 10-1, forming a stepped first inner space 11 between the bent rib 10-3, the side flange 10-2 and the main body 10-1;

[0080] The distance B from the axis center A on the fixed sleeve 10 to the inner ring of the bent rib 10-3 is smaller than the distance C from the axis center A to the inner wall of the main body 10-1;

[0081] The shape and size setting facilitates the integral molding of the main body 10-1, the side flange 10-2 and the bent flange 10-3, forming a stepped first inner space 11. The elastic gasket 20 and the liner 30 can be arranged in the first inner space 11, so that the fixed sleeve 10, the elastic gasket 20 and the liner 30 form a relative whole. The side flange 10-2 can be welded to the end surface 101 on the end plate 100, making the assembly operation relatively convenient.

[0082] Another embodiment:

[0083] like Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 As shown; in implementation, the elastic gasket 20 is a corrugated gasket, made of metal material, such as stainless steel, which has a relatively higher structural strength than rubber material;

[0084] The elastic gasket 20 has a plurality of crests 20 - 1 and a plurality of troughs 20 - 2 , for example, four crests 20 - 1 and four troughs 20 - 2 , or five crests 20 - 1 and five troughs 20 - 2 ;

[0085] The wave crests 20-1 are spaced apart from each other, and the wave troughs 20-2 are spaced apart from each other. The wave crests 20-1 are connected to the wave troughs 20-2, so that the elastic gasket 20 has an elastic buffering effect, which can reduce the axial force, so that the rotor assembly does not move forward, and the probability of collision between the impeller at the front end of the rotor assembly and the pump casing is reduced, and the structural reliability is relatively good;

[0086] The linear distance x between the crest 20 - 1 and the trough 20 - 2 is 2 mm to 4 mm; the wall thickness y at the crest 20 - 1 or the trough 20 - 2 is 0.3 mm to 0.8 mm. This dimensional control improves the strength of the structure and ensures the elastic buffering effect.

[0087] When the second inner space 21 is passed through by the rotating shaft 200, a first gap is provided between the rotating shaft 200 and the elastic gasket 20. The first gap is provided so that the gap between the elastic gasket 20 and the rotating shaft 200 is provided, and the assembly operation is relatively convenient;

[0088] Another embodiment:

[0089] like Figure 1 、 Figure 2 、 Figure 7As shown; in implementation, the material of the liner 30 is ceramic, and the structural strength is relatively high;

[0090] The liner 30 includes: a first portion 30-1, disposed between the fixed outer sleeve 10 and the elastic gasket 20; and a second portion 30-2, one end of which is connected to the first portion 30-1 and the other end of which passes through the first inner space 11; and a third inner space 31 is defined between the first portion 30-1 and the second portion 30-2.

[0091] The first portion 30-1 is a circular plate-shaped structure; the second portion 30-2 is a circular plate-shaped structure; the centerline of the first portion 30-1 and the centerline of the second portion 30-2 are collinear; the outer diameter of the first portion 30-1 is greater than the outer diameter of the second portion 30-2; the shape and size are controlled to form a stepped structure on the outer circumference of the gasket 30, which facilitates positioning in the first inner space 11 and facilitates assembly.

[0092] The other end of the second portion 30-2 further has a plurality of arcuate grooves 30-21. The arcuate grooves 30-21 are spaced apart and originate from the third inner space 31 and extend through the outer circumference of the second portion 30-2. The arcuate grooves 30-21 allow coolant to flow through the arcuate grooves 30-21 when the liner 30 contacts the front bearing 300, thereby facilitating heat dissipation and extending the service life of the liner 30 and the front bearing 300.

[0093] When the rotating shaft 200 passes through the third inner space 31 , a second gap is formed between the rotating shaft 200 and the liner 30 . The second gap is provided so that the gap between the liner 30 and the rotating shaft 200 is provided, and the assembly operation is relatively convenient.

[0094] The working principle is as follows: the elastic gasket 20 and the liner 30 are connected to the first inner space 11 on the fixed outer sleeve 10 to form a relative whole, and then the fixed outer sleeve 10 is connected to the end plate 100, and the assembly operation is relatively convenient;

[0095] The elastic gasket 20 is made of metal, which has a relatively high structural strength and a relatively long service life;

[0096] The second inner space 21 on the elastic gasket 20 and the third inner space 31 on the liner 30 are sleeved on the rotating shaft 200. The elastic gasket 20 and the liner 30 are respectively provided with gaps with the rotating shaft 200, and the assembly operation is relatively convenient.

[0097] When the electronic water pump is running, an axial force is generated. The liner 30 on the rotor thrust member structure is pressed against the front bearing 300 to form a support, and the elastic gasket 20 forms an elastic buffer, which has the function of unloading the force, so that the rotor assembly will not move forward, and the probability of collision between the impeller at the front end of the rotor assembly and the pump casing is reduced. The structural reliability is relatively good and the service life is relatively long.

[0098] In the description, it should be understood that the terms "upper", "lower", "left", "right", "front", "back", etc. indicating directions or positional relationships are based on the positional relationships shown in the drawings and are only used to facilitate or simplify the description, and do not necessarily indicate specific directions. The operating procedures described in the embodiments are not absolute steps for use and may be adjusted accordingly in actual use.

[0099] Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meanings understood by persons of ordinary skill in the relevant art. The terms "first," "second," and similar words used in the specification and claims do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "an" and similar words do not necessarily indicate a limit on quantity, but rather indicate the presence of at least one, which shall be determined based on the content of the embodiments.

[0100] The above is only a preferred specific implementation method, but the scope of protection is not limited to this. Any technician familiar with this technical field can make equivalent replacements or changes based on the technical solutions and inventive concepts within the disclosed technical scope, which should be covered by the scope of protection.

Claims

1. A rotor thrust member structure, characterized in that: include: A fixed outer sleeve (10), the fixed outer sleeve (10) being connected to the end plate (100), and the fixed outer sleeve (10) having a first inner space (11); An elastic gasket (20) made of metal is disposed in the first inner space (11), one side of the gasket being in contact with the end plate (100), and a second inner space (21) is provided in the middle of the gasket (20), and the second inner space (21) surrounds the rotating shaft (200); and a liner (30), one end of the liner (30) being arranged in the first inner space (11) and between the fixed outer sleeve (10) and the elastic gasket (20), and the other end passing through the first inner space (11) and protruding from the fixed outer sleeve (10), and a third inner space (31) being provided in the middle position of the liner (30), the third inner space (31) being communicated with the second inner space (21), and the third inner space (31) surrounding the rotating shaft (200).

2. A rotor thrust member structure according to claim 1, characterized in that: The fixed jacket (10) comprises: a main body (10-1); A side convex edge (10-2) is connected to one end of the main body (10-1) and is used for connecting to the end plate (100); and a bent rib (10-3) connected to the other end of the main body (10-1) to form the first inner space (11) between the side convex edge (10-2) and the main body (10-1), and the bent rib (10-3) is used to block the liner (30).

3. A rotor thrust member structure according to claim 2, characterized in that: The main body (10-1) is a cylindrical structure; The side convex edge (10-2) is a circular plate-shaped structure, the middle position of which is connected to one end of the main body (10-1), and the edge of which is away from the main body (10-1); The bent rib (10-3) starts from the connection with the main body (10-1) and bends along an arc toward the center straight line of the main body (10-1), and a stepped first inner space (11) is formed between the bent rib (10-3), the side convex edge (10-2) and the main body (10-1).

4. The rotor thrust member structure according to claim 1, characterized in that: The elastic gasket (20) is a corrugated gasket; The elastic gasket (20) has a plurality of wave crests (20-1) and a plurality of wave troughs (20-2); The wave crests (20-1) are spaced apart from each other, the wave troughs (20-2) are spaced apart from each other, and the wave crests (20-1) are connected to the wave troughs (20-2).

5. A rotor thrust member structure according to claim 4, characterized in that: The straight-line distance dimension x between the wave crest (20-1) and the wave trough (20-2) is 2 mm to 4 mm; The wall thickness dimension y at the wave crest (20-1) or the wave trough (20-2) is 0.3 mm to 0.8 mm.

6. The rotor thrust member structure according to claim 1, characterized in that: The material of the liner (30) is ceramic; The liner (30) comprises: a first portion (30-1) disposed between the fixed outer sleeve (10) and the elastic gasket (20); and a second portion (30-2) having one end connected to the first portion (30-1) and the other end extending out of the first inner space (11); The third inner space (31) is provided at a middle position between the first part (30-1) and the second part (30-2).

7. A rotor thrust member structure according to claim 6, characterized in that: The first part (30-1) is a circular plate-shaped structure; The second part (30-2) is a circular plate-shaped structure; The center line of the first part (30-1) and the center line of the second part (30-2) are on the same straight line; The outer diameter of the first part (30-1) is greater than the outer diameter of the second part (30-2).

8. The rotor thrust member structure according to claim 7, characterized in that: The other end of the second part (30-2) is further provided with a plurality of arc-shaped grooves (30-21), the arc-shaped grooves (30-21) are arranged at intervals, and the arc-shaped grooves (30-21) start from the third inner space (31) and pass through the outer circle of the second part (30-2).

9. The rotor thrust member structure according to claim 1, characterized in that: When the rotating shaft (200) passes through the second inner space (21), a first gap exists between the rotating shaft (200) and the elastic gasket (20); When the rotating shaft (200) passes through the third inner space (31), a second gap is formed between the rotating shaft (200) and the liner (30).

10. An electronic water pump having a rotor thrust member structure, comprising: End plate (100); AXIS(200); and a front bearing (300); characterized in that it further comprises: a rotor thrust member structure according to any one of claims 1 to 9; The fixed sleeve (10) is connected to the end plate (100); The elastic gasket (20) and the liner (30) surround the rotating shaft (200) and are provided with a gap from the rotating shaft (200); When the electronic water pump is in operation, the gasket (30) contacts the front bearing (300); When the electronic water pump stops operating, a third gap is provided between the gasket (30) and the front bearing (300).

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