Thrust washer assembly and rotor using same

Abstract

The utility model discloses a thrust washer assembly and a rotor using the thrust washer assembly, and relates to the technical field of electronic water pumps and parts of the electronic water pumps, and the thrust washer assembly comprises a thrust washer body and an elastic washer; a main accommodating groove is formed in the elastic washer, the thrust washer body is embedded in the main accommodating groove of the elastic washer, and the top surface of the thrust washer body is exposed out of the main accommodating groove of the elastic washer; an inner hole of the elastic washer extends in the radial direction to form an axial positioning rib, and the elastic washer is pulled up relative to the end face of the other side of the main containing groove in the axial direction to form a rotary positioning rib. The utility model mainly solves the problem of how to provide a reasonable limiting structure for the thrust washer on a rotating shaft-rotor component assembly body; the thrust washer assembly can be positioned in the axial direction and the rotating direction respectively, the thrust washer assembly is not prone to dislocating and moving, in addition, the assembling structure of the thrust washer assembly is simplified, and therefore the assembling cost of the thrust washer assembly is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic water pump and its spare part technical field, concretely is a thrust washer subassembly and application thereof's rotor. BACKGROUND

[0002] Electronic water pump has higher output efficiency and can realize accurate flow control, therefore, electronic water pump is widely used in automobile, household appliance and industrial equipment, for example, new energy automobile usually is configured with two or even more electronic water pump, to be used as the power source of entire cooling system.

[0003] Impeller and rotor assembly are one of the core spare parts of electronic water pump, impeller and rotor assembly are usually rigidly connected through the shaft, electronic water pump runs, is influenced by multiple factors, and rotor assembly will have a certain degree of axial movement, for example, impeller of electronic water pump is influenced by water power when running under rated condition, will produce a force opposite to the direction of water flow, and then drags rotor assembly through the shaft, and makes rotor assembly displace towards the direction close to impeller.

[0004] In order to avoid excessive displacement of impeller-rotor assembly assembly, and protect other spare parts of electronic water pump, thrust washer is usually arranged at rotor assembly or the chamber of electronic water pump.

[0005] The Chinese invention patent application publication text with the publication number CN116538141A and the name of 《Pump cover, electronic water pump and new energy automobile applying the electronic water pump》discloses the body structure and assembly structure of thrust washer when integrating thrust washer on the pump cover of electronic water pump.

[0006] The Chinese utility model patent application publication text with the publication number CN219101681U and the name of 《Bearing, rotor assembly and centrifugal water pump》discloses the body structure and assembly structure of thrust washer when arranging thrust washer in the chamber of electronic water pump.

[0007] In the prior art, when arranging thrust washer on the shaft, a thrust washer of ceramic material and a buffer pad of rubber material are usually configured, and the thrust washer and the buffer pad are directly sleeved on the shaft;Since the thrust washer and the buffer pad are not provided with limiting structure in the axial direction and the rotating direction, when the rotor assembly and the shaft rotate, relative rotation between the rotor assembly and the shaft and the buffer pad is prone to occur, which is easy to cause the problem of buffer pad wear, thereby affecting the axial limiting size of the thrust washer, and is easy to produce wear debris, thereby affecting the internal cleanliness of the electronic water pump, and finally causing the rotor assembly to be stuck;On the other hand, due to the lack of axial direction limiting of the thrust washer, the thrust washer is easy to slide out along the extension direction of the shaft during assembly, which is not conducive to assembly operation.

[0008] In summary, how to provide reasonable limiting structure for the thrust washer on the shaft-rotor assembly assembly body becomes one of the problems to be solved. Practical new type content

[0009] The utility model discloses a kind of thrust washer assemblies and rotors applying it, which can provide reasonable limiting structure for the thrust washer on the shaft-rotor assembly assembly body.

[0010] To achieve the above object, the utility model provides the following technical scheme: a kind of thrust washer assembly, it includes thrust washer body and elastic washer;Main accommodating groove is formed in the elastic washer, the thrust washer body is embedded in the main accommodating groove of the elastic washer, and the top surface of the thrust washer body is exposed to the main accommodating groove of the elastic washer;The inner hole of the elastic washer extends along the radial direction, forms axial positioning rib, and the other side end surface of the elastic washer is pulled up along the axial direction relative to the main accommodating groove, forms rotation positioning rib.

[0011] In the above technical scheme, the outer side of the thrust washer body extends along the radial direction, forms engagement rib;Annular engagement groove is formed in the main accommodating groove of the elastic washer;After the thrust washer body is embedded in the main accommodating groove of the elastic washer, the engagement rib of the thrust washer body is inserted into the engagement groove of the elastic washer.

[0012] In the above technical scheme, deformation groove is formed at the axial positioning rib of the elastic washer.

[0013] In the above technical scheme, the top surface of the thrust washer body is protruded than the end surface of the elastic washer, or the top surface of the thrust washer body is flush with the end surface of the elastic washer.

[0014] A rotor includes the above-mentioned thrust washer assembly.

[0015] In the above technical scheme, the rotor of the utility model further includes rotor assembly and shaft member, the rotor assembly is sleeved on the shaft member;The side of the shaft member forms axial positioning groove;At least one end surface of the rotor assembly forms rotation positioning groove;The elastic washer of the thrust washer assembly is sleeved on the shaft member, and the end surface of the elastic washer provided with rotation positioning rib abuts against the end surface of the rotor assembly;The axial positioning rib of the elastic washer is inserted into the axial positioning groove of the shaft member, and the rotation positioning rib of the elastic washer is inserted into the rotation positioning groove of the rotor assembly.

[0016] In the technical scheme, the rotor assembly comprises a rotor core, permanent magnets, a rotor sleeve member and rotor end cover members; the rotor core is provided with an axle hole and a plurality of permanent magnet insertion holes; the permanent magnets are respectively inserted into the permanent magnet insertion holes of the rotor core; the rotor core is provided with the rotor end cover members at two ends thereof; the rotor shaft member penetrates through the rotor end cover members and then penetrates into the axle hole of the rotor core; the rotor sleeve member is sleeved on the rotor core and the rotor end cover members to fasten the rotor core and the rotor end cover members; and the rotation positioning groove is arranged at the rotor end cover member of the rotor assembly.

[0017] In the technical scheme, the rotor end cover member is subjected to stamping processing to form the rotation positioning groove on the outer side of the rotor end cover member and the positioning convex position on the inner side of the rotor end cover member; the rotor core is provided with a subtractive positioning hole axially penetrating through the rotor core; and the positioning convex position of the rotor end cover member is clamped into the subtractive positioning hole of the rotor core.

[0018] In the technical scheme, the inner diameter of the rotation positioning groove of the rotor assembly is greater than the outer diameter of the rotation positioning rib of the elastic gasket.

[0019] In the technical scheme, the width of the axial positioning groove of the rotor shaft member is greater than the thickness of the axial positioning rib of the elastic gasket.

[0020] Compared with the prior art, the application has the advantages that: the inner hole of the elastic gasket of the thrust washer assembly and the rotor applying the same is provided with the axial positioning rib which can be clamped into the axial positioning groove of the rotor shaft member to fix the whole thrust washer assembly in the axial direction through the cooperation of the axial positioning rib and the axial positioning groove; the end surface of the elastic gasket is further provided with the rotation positioning rib which can be clamped into the rotation positioning groove of the rotor assembly to fix the whole thrust washer assembly in the rotation direction through the rotation positioning rib and the rotation positioning groove; in this way, the thrust washer assembly can be positioned in the axial direction and the rotation direction respectively, so that the thrust washer assembly is not prone to dislocation and movement, and the assembly structure of the thrust washer assembly is simplified, thereby saving the assembly cost of the thrust washer assembly. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is one of the perspective views of the embodiment one of the application.

[0022] Figure 2 It is the second perspective view of the embodiment one of the application.

[0023] Figure 3 It is the exploded view of the embodiment one of the application.

[0024] Figure 4 Figure 1 is a sectional view of the utility model embodiment one.

[0025] Figure 5 Figure 2 is a perspective view of the utility model embodiment two.

[0026] Figure 6 Figure 3 is an exploded view of the utility model embodiment two.

[0027] Figure 7 Figure 4 is a sectional view of the utility model embodiment two.

[0028] The figure mark is: 1, thrust washer assembly;11, thrust washer body;111, top surface;112, clamping rib;12, elastic washer;121, main containing groove;122, clamping groove;123, inner hole;124, axial positioning rib;125, rotation positioning rib;126, deformation groove;2, rotor assembly;21, rotor core;211, permanent magnet insertion hole;212, subtractive positioning hole;213, shaft hole;22, permanent magnet;23, rotor outer sleeve component;24, rotor end cover component;241, rotation positioning groove;242, positioning convex position;3, shaft component;31, axial positioning groove. DETAILED DESCRIPTION

[0029] The technical scheme in the utility model embodiments will be described clearly and completely below in conjunction with the drawings in the utility model embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0030] Embodiment one:

[0031] The embodiment provides a kind of thrust washer assembly, it can be applied to the rotor of water pump (especially electronic water pump), to prevent the rotor from exceeding limit axial movement, and then protect the rotor and other components of water pump.

[0032] Please refer to Figures 1-4 , the thrust washer assembly 1 of the embodiment includes thrust washer body 11 and elastic washer 12.

[0033] Wherein, thrust washer body 11 is ceramic gasket or metal gasket, in the embodiment, thrust washer body 11 is ceramic gasket, its outer contour is substantially flaky;Elastic washer 12 is the hollow circular sleeve shaped component made of flexible material, for example, rubber, silicone or flexible plastic material.

[0034] The elastic washer 12 is formed with a main accommodating groove 121, the opening of the main accommodating groove 121 is communicated to one side end surface of the elastic washer 12, the thrust washer body 11 is embedded in the main accommodating groove 121 of the elastic washer 12, so as to fix the thrust washer body 11 in the elastic washer 12, and the top surface 111 of the thrust washer body 11 is exposed to the main accommodating groove 121 of the elastic washer 12, so as to ensure that the top surface 111 of the thrust washer body 11 can contact with other parts of the water pump.

[0035] The inner hole 123 of the elastic washer 12 extends in the radial direction, and forms an axial positioning rib 124, specifically, the axial positioning rib 124 is substantially annular and is integrally formed in the inner hole 123 of the elastic washer 12; and the other side end surface of the main accommodating groove 121 of the elastic washer 12 is pulled up in the axial direction, forming a rotation positioning rib 125, specifically, the rotation positioning rib 125 is a point-like protruding structure integrally formed on the end surface of the elastic washer 12, in the embodiment, the rotation positioning rib 125 is circumferentially distributed with four on the end surface of the elastic washer 12.

[0036] Further, the outer side surface of the thrust washer body 11 extends in the radial direction, forming a clamping rib 112, specifically, the clamping rib 112 is substantially annular and is integrally formed on the outer side surface of the thrust washer body 11; the main accommodating groove 121 of the elastic washer 12 is formed with an annular clamping groove 122, specifically, the clamping groove 122 is formed on the inner wall of the main accommodating groove 121 of the elastic washer 12 in the radial direction; after the thrust washer body 11 is embedded in the main accommodating groove 121 of the elastic washer 12, the clamping rib 112 of the thrust washer body 11 is clamped into the clamping groove 122 of the elastic washer 12; in this way, the thrust washer body 11 can be reliably fixed in the main accommodating groove 121 of the elastic washer 12, so that the thrust washer body 11 and the elastic washer 12 form a structure that is not easy to separate from each other, and further form the thrust washer assembly 1.

[0037] Further, the axial positioning rib 124 of the elastic washer 12 is formed with a deformation groove 126, in the embodiment, the deformation groove 126 is two notches formed in the axial positioning rib 124; the deformation groove 126 is provided so that the axial positioning rib 124 can deform to a greater extent when sleeved into a rigid structure, facilitating assembly of the thrust washer assembly 1, and avoiding damage to the axial positioning rib 124 during assembly.

[0038] Further, the top surface 111 of the thrust washer body 11 is protruded from the end surface of the elastic washer 12, or the top surface 111 of the thrust washer body 11 is flush with the end surface of the elastic washer 12; in this way, it can be ensured that the top surface 111 of the thrust washer body 11 can contact with other parts of the water pump.

[0039] The thrust washer assembly 1 of the present embodiment is applied to the rotor of a water pump (especially an electronic water pump), and the axial positioning rib 124 of the elastic washer 12 can be clamped into the positioning groove structure of the shaft to axially position the entire thrust washer assembly 1, and the rotation positioning rib 125 of the elastic washer 12 can be inserted into the positioning hole structure of the rotor assembly 2 to rotationally position the entire thrust washer assembly 1.

[0040] Embodiment Two

[0041] The present embodiment also provides a rotor which can be used as the rotor mechanism of a water pump (especially an electronic water pump).

[0042] The rotor of the present embodiment comprises the thrust washer assembly 1 of Embodiment One.

[0043] Please refer to Figures 5-7 The rotor of the present embodiment further comprises a rotor assembly 2 and a shaft member 3, wherein the shaft member 3 is a metal shaft with a substantially cylindrical outer profile, and the rotor assembly 2 is sleeved on the shaft member 3.

[0044] The side surface of the shaft member 3 is formed with an axial positioning groove 31, which is actually an annular groove body integrally formed on the side surface of the shaft member 3, and can be obtained by turning or integrally die-casting on the side surface of the shaft member 3.

[0045] At least one end surface of the rotor assembly 2 is formed with a rotation positioning groove 241, which is actually a dot-shaped recess integrally formed on the end surface of the rotor assembly 2.

[0046] The elastic washer 12 of the thrust washer assembly 1 is sleeved on the shaft member 3, and the end surface of the elastic washer 12 provided with the rotation positioning rib 125 abuts against the end surface of the rotor assembly 2; the axial positioning rib 124 of the elastic washer 12 is clamped into the axial positioning groove 31 of the shaft member 3 to fix the entire thrust washer assembly 1 in the axial direction through the cooperation of the axial positioning rib 124 and the axial positioning groove 31, and the rotation positioning rib 125 of the elastic washer 12 is clamped into the rotation positioning groove 241 of the rotor assembly 2 to fix the entire thrust washer assembly 1 in the rotation direction through the cooperation of the rotation positioning rib 125 and the rotation positioning groove 241.

[0047] Specifically, the rotor assembly 2 comprises a rotor core 21, permanent magnets 22, a rotor sleeve member 23, and rotor end cover members 24; wherein the rotor core 21 is a solid member stacked by a plurality of silicon steel sheets, used as the mechanism base and magnetic conductor of the rotor assembly 2; the permanent magnets 22 (also known as magnetic steel or magnetic tile) are provided with a plurality of pieces, and are all square blocks, which have permanent magnetism; the rotor sleeve member 23 (also known as a steel sleeve) is a thin cylindrical steel member, which can be interference-fitted with the rotor core 21; the rotor end cover member 24 is a thin circular steel cover, which can also be interference-fitted with the rotor sleeve member 23; the rotor core 21 is formed with a shaft hole 213, which is adapted to be interference-fitted with the shaft member 3, and the rotor core 21 is also formed with a plurality of permanent magnet insertion holes 211, which are adapted to insert the permanent magnets 22; the permanent magnets 22 are respectively inserted into each of the permanent magnet insertion holes 211 of the rotor core 21, so that the permanent magnets 22 are interference-fitted with the permanent magnet insertion holes 211, and the permanent magnets 22 are fixed in the permanent magnet insertion holes 211 by adhesive; the rotor core 21 is provided with the rotor end cover member 24 at both ends, the shaft member 3 passes through the rotor end cover member 24 and then enters the shaft hole 213 of the rotor core 21, and in fact, the shaft member 3 is interference-fitted with the rotor core 21 and the rotor end cover member 24; the rotor sleeve member 23 is sleeved on the rotor core 21 and the rotor end cover member 24 to fasten the rotor core 21 and the rotor end cover member 24, that is, the rotor sleeve member 23 interference-fits the rotor core 21, the rotor end cover member 24 and itself to be integrated, thereby forming the rotor assembly 2; the rotation positioning groove 241 is provided at the rotor end cover member 24 of the rotor assembly 2, that is, the end face of the elastic washer 12 provided with the rotation positioning rib 125 abuts against the rotor end cover member 24 of the rotor assembly 2, and the rotation positioning rib 125 of the elastic washer 12 is clamped into the rotation positioning groove 241 of the rotor end cover member 24.

[0048] Further, the rotor end cover member 24 is subjected to stamping treatment to form the rotation positioning groove 241 on the outside of the rotor end cover member 24 and the positioning protrusion 242 on the inside of the rotor end cover member 24, that is, the rotor end cover member 24 is subjected to stamping treatment to deform, so that the rotation positioning groove 241 and the positioning protrusion 242 are respectively formed on both sides of the rotor end cover member 24; the rotor core 21 is formed with a subtractive positioning hole 212 axially penetrating through itself, specifically, the subtractive positioning hole 212 is a circular hole and communicates to the end face of the rotor core 21; the positioning protrusion 242 of the rotor end cover member 24 is clamped into the subtractive positioning hole 212 of the rotor core 21, in this way, on the one hand, the rotor core 21 is lightened, and on the other hand, the rotation direction of the rotor end cover member 24 is positioned by the subtractive positioning hole 212.

[0049] Further, the inner diameter of the rotation positioning groove 241 of the rotor assembly 2 is greater than the outer diameter of the rotation positioning rib 125 of the elastic washer 12, so that the rotation positioning groove 241 and the rotation positioning rib 125 are in a clearance fit, which facilitates assembly and provides a certain rotation space for the thrust washer assembly 1.

[0050] Further, the width of the axial positioning groove 31 of the shaft member 3 is greater than the thickness of the axial positioning rib 124 of the elastic washer 12, so that the axial positioning groove 31 and the axial positioning rib 124 are in a clearance fit, which provides a certain axial space for the thrust washer assembly 1.

[0051] In the embodiment, the rotation positioning rib 125 is circumferentially and evenly distributed on the end face of the elastic washer 12, and correspondingly, the rotation positioning groove 241 of the rotor end cover member 24 is also circumferentially and evenly distributed. In practice, in order to facilitate assembly, the rotation positioning groove 241 of the rotor end cover member 24 can be set as a multiple of the rotation positioning rib 125.

[0052] In the assembly of the rotor, the rotor core 21, the plurality of permanent magnets 22, the rotor sleeve member 23 and the rotor end cover member 24 are assembled into the rotor assembly 2, and then the shaft member 3 is inserted into the shaft hole 213 of the rotor assembly 2 to form an assembly of the shaft member 3 and the rotor assembly 2. In addition, the thrust washer assembly 1 composed of the thrust washer body 11 and the elastic washer 12 is pre-assembled and ready for use. When the thrust washer assembly 1 is assembled to the rotor, the elastic washer 12 is set with the side of the rotation positioning rib 125 facing the rotor assembly 2, and the elastic washer 12 is sleeved into the shaft member 3. The elastic washer 12 is pushed until the end face of the elastic washer 12 abuts against the end face of the rotor assembly 2. At this time, the axial positioning rib 124 of the elastic washer 12 is clamped into the axial positioning groove 31 of the shaft member 3, and the rotation positioning rib 125 of the elastic washer 12 is clamped into the rotation positioning groove 241 of the rotor assembly 2. In the above process, the existence of the deformation groove 126 provides a larger deformation space for the axial positioning rib 124, so that the elastic washer 12 is easily sleeved into the shaft member 3. In addition, if the rotation positioning rib 125 of the elastic washer 12 fails to be clamped into the rotation positioning groove 241 of the rotor assembly 2, there is a larger gap between the elastic washer 12 and the rotor assembly 2, and the axial positioning rib 124 of the elastic washer 12 cannot be clamped into the axial positioning groove 31 of the shaft member 3. Therefore, the rotation positioning rib 125 also has a foolproof function.

[0053] The inner hole 123 of the elastic washer 12 of the thrust washer assembly 1 and the rotor applying the same is provided with an axial positioning rib 124 which can be clamped into the axial positioning groove 31 of the rotating shaft component 3, so as to fix the whole thrust washer assembly 1 in the axial direction through the cooperation of the axial positioning rib 124 and the axial positioning groove 31, and the end face of the elastic washer 12 is further provided with a rotation positioning rib 125 which can be clamped into the rotation positioning groove 241 of the rotor assembly 2, so as to fix the whole thrust washer assembly 1 in the rotation direction through the rotation positioning rib 125 and the rotation positioning groove 241; in this way, the thrust washer assembly 1 can be positioned in the axial direction and the rotation direction respectively, so that the thrust washer assembly 1 is not easy to dislocate and move, and in addition, the assembly structure of the thrust washer assembly 1 is simplified, thereby saving the assembly cost of the thrust washer assembly 1.

[0054] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the embodiments can be substantially changed without departing from the spirit and the scope of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A thrust washer assembly characterized by, The thrust washer assembly comprises a thrust washer body and an elastic washer; The elastic washer is provided with a main accommodating groove, and the thrust washer body is embedded in the main accommodating groove of the elastic washer, and the top surface of the thrust washer body is exposed to the main accommodating groove of the elastic washer; The inner hole of the elastic washer extends in the radial direction to form an axial positioning rib, and the elastic washer is pulled up in the axial direction relative to the other side end surface of the main accommodating groove to form a rotational positioning rib.

2. The thrust washer assembly of claim 1, wherein, The outer side surface of the thrust washer body extends in the radial direction to form a clamping rib; The main accommodating groove of the elastic washer is provided with an annular clamping groove; After the thrust washer body is embedded in the main accommodating groove of the elastic washer, the clamping rib of the thrust washer body is clamped into the clamping groove of the elastic washer.

3. The thrust washer assembly of claim 1, wherein, The axial positioning rib of the elastic washer is provided with a deformation groove.

4. The thrust washer assembly of claim 1, wherein, The top surface of the thrust washer body is protruded relative to the end surface of the elastic washer, or the top surface of the thrust washer body is flush with the end surface of the elastic washer.

5. A rotor characterized by, The thrust washer assembly comprises the thrust washer assembly of any one of claims 1-4.

6. The rotor of claim 5, wherein The rotor assembly and the shaft member are further provided, and the rotor assembly is sleeved on the shaft member; The side surface of the shaft member is provided with an axial positioning groove; At least one end surface of the rotor assembly is provided with a rotational positioning groove; The elastic washer of the thrust washer assembly is sleeved on the shaft member, and the end surface of the rotational positioning rib of the elastic washer is abutted against the end surface of the rotor assembly; The axial positioning rib of the elastic washer is clamped into the axial positioning groove of the shaft member, and the rotational positioning rib of the elastic washer is clamped into the rotational positioning groove of the rotor assembly.

7. The rotor of claim 6, wherein The rotor assembly comprises a rotor core, a permanent magnet, a rotor sleeve member and a rotor end cover member; The rotor core is provided with an axial hole, and a plurality of permanent magnet insertion holes are further formed on the rotor core; The permanent magnet is respectively inserted into each permanent magnet insertion hole of the rotor core; The rotor end cover member is respectively arranged at both ends of the rotor core, and the shaft member penetrates through the rotor end cover member and then penetrates into the axial hole of the rotor core; The rotor sleeve member is sleeved on the rotor core and the rotor end cover member to fasten the rotor core and the rotor end cover member; The rotational positioning groove is arranged at the rotor end cover member of the rotor assembly.

8. The rotor of claim 7, wherein The rotor end cover member is subjected to stamping treatment to form the rotational positioning groove on the outer side of the rotor end cover member and to form a positioning protrusion on the inner side of the rotor end cover member; The rotor core is provided with an axial through-hole which is a subtractive positioning hole; The positioning protrusion of the rotor end cover member is clamped into the subtractive positioning hole of the rotor core.

9. A rotor according to any one of claims 6-8, characterised in that The inner diameter of the rotational positioning groove of the rotor assembly is greater than the outer diameter of the rotational positioning rib of the elastic washer.

10. A rotor according to any one of claims 6-8, characterised in that The width of the axial positioning groove of the shaft member is greater than the thickness of the axial positioning rib of the elastic washer.

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