Rotor assemblies, motors, water pumps and vehicles

Abstract

The present invention provides a rotor assembly, a motor, a water pump and a vehicle. The rotor assembly includes: a wear-resistant plate; a rotor, which is sleeved on a rotating shaft, and a limiting structure is provided on the end face of the rotor facing the wear-resistant plate, and the limiting structure includes at least one stop protrusion, and the stop protrusion is used to stop and cooperate with the end of the wear-resistant plate away from the rotor to limit the axial position of the wear-resistant plate; an elastic support member, which is clamped between the wear-resistant plate and the end face of the rotor and is used to elastically support the wear-resistant plate. Since the elastic support member has a compressible adjustment function, the wear-resistant plate can float axially during operation, thereby avoiding rigid impact between the wear-resistant plate and the sliding bearing, and greatly improving the wear between the wear-resistant plate and the sliding bearing, thereby reducing system noise, extending product life, and improving product work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor assembly, a motor including the rotor assembly, a water pump including the motor, and a vehicle including the water pump. Background Art

[0002] At present, during the operation of the system, the wear-resistant plate of the existing rotor is in rigid contact with the end face of the sliding bearing, which will aggravate the wear of the parts, increase the noise, and reduce the product life. Summary of the Invention

[0003] In order to solve at least one of the above technical problems, an object of the present invention is to provide a rotor assembly.

[0004] A second object of the present invention is to provide a motor comprising the above rotor assembly.

[0005] A third object of the present invention is to provide a water pump comprising the above-mentioned motor.

[0006] A fourth object of the present invention is to provide a vehicle including the water pump.

[0007] In order to achieve the above-mentioned objectives, the technical solution of the first aspect of the present invention provides a rotor assembly, comprising: a wear-resistant plate; a rotor, wherein the rotor is provided with a limiting structure on the end face facing the wear-resistant plate, and the limiting structure includes at least one stop protrusion, and the stop protrusion is used to stop and cooperate with the end of the wear-resistant plate away from the rotor to limit the axial position of the wear-resistant plate; an elastic support member, clamped between the wear-resistant plate and the end face of the rotor, for elastically supporting the wear-resistant plate.

[0008] The rotor assembly provided by the technical solution of the first aspect of the present invention has an elastic support member added between the wear-resistant plate and the end face of the rotor. Since the elastic support member has a compressible and adjustable function, the wear-resistant plate can float axially during operation, thereby avoiding rigid impact between the wear-resistant plate and the sliding bearing, and greatly improving the wear between the wear-resistant plate and the sliding bearing, thereby reducing system noise, extending product life, and improving product work efficiency. At the same time, under the restriction of the stop protrusion of the limiting structure, the wear-resistant plate cannot be tightly pressed against the sliding bearing under the elastic force of the elastic support member, which is conducive to reducing the axial extrusion force between the wear-resistant plate and the sliding bearing, preventing excessive axial extrusion force between the wear-resistant plate and the sliding bearing, and further improving the wear between the wear-resistant plate and the sliding bearing, further reducing system noise, and further extending product life. In addition, the setting of the limiting structure can also prevent the elastic support member from detaching from the rotor, thereby improving the stability and reliability of the product.

[0009] It is understandable that the wear-resistant sheet can also be called a gasket, and the material can be but is not limited to ceramic, metal or alloy.

[0010] In addition, the rotor assembly in the above technical solution provided by the present invention may also have the following additional technical features:

[0011] In the above technical solution, the limiting structure includes: an annular limiting portion, one end of which is connected to the end face of the rotor, and the other end of which is provided with at least one stop protrusion, and the annular limiting portion is sleeved on the outside of the wear-resistant plate.

[0012] The stop protrusion is provided at the end of the annular limiting portion away from the rotor, and is used to stop and cooperate with the end of the wear-resistant plate away from the rotor. The wear-resistant plate is then clamped between the elastic support member and the stop protrusion. Under the obstruction of the stop protrusion, the wear-resistant plate cannot pass through the stop protrusion in the axial direction, thereby limiting the axial position of the wear-resistant plate. When the wear-resistant plate is impacted by the sliding bearing, the wear-resistant plate can compress the elastic support member and move toward the rotor, thereby preventing a rigid impact between the wear-resistant plate and the sliding bearing. In addition, it can also prevent the elastic support member and the wear-resistant plate from escaping from the gap between the stop protrusion and the rotor, thereby improving the stability and reliability of the product. At the same time, the annular limiting portion can also circumferentially limit the wear-resistant plate and the elastic support member, which is beneficial to prevent the wear-resistant plate and the elastic support member from radial displacement, tilting, etc., further improving the stability and reliability of the wear-resistant plate and the elastic support member.

[0013] In the above technical solution, the wear-resistant plate is provided with an avoidance gap for avoiding the stop protrusion, and the wear-resistant plate is suitable for rotating relative to the annular limiting portion so that the avoidance gap and the stop protrusion are staggered.

[0014] Providing an avoidance notch on the wear-resistant sheet can achieve interference-free assembly of the wear-resistant sheet, which is beneficial to reducing the assembly difficulty of the wear-resistant sheet, thereby improving assembly efficiency. Specifically, during assembly, the avoidance notch of the wear-resistant sheet is aligned with the stop protrusion, the wear-resistant sheet is installed in the annular limit portion, and then the wear-resistant sheet is rotated so that the avoidance notch of the wear-resistant sheet is staggered with the stop protrusion. The stop protrusion then blocks the wear-resistant sheet, and the wear-resistant sheet cannot reversely cross the stop protrusion and escape from the annular limit portion without any external force.

[0015] In the above technical solution, the wear-resistant plate is provided with a step groove, and the stop protrusion is at least partially embedded in the step groove.

[0016] The setting of the step groove makes the end face of the wear-resistant plate facing away from the rotor not a complete plane, but has high and low levels and a concave structure. The stop protrusion and the wear-resistant plate form a concave-convex matching structure, which can prevent the wear-resistant plate from rotating relative to the rotor during operation, causing it to disengage from the stop protrusion and fall out of the annular limit portion, thereby improving the stability and reliability of the wear-resistant plate and the elastic support.

[0017] In the above technical solution, the working load on the wear-resistant plate is Fa, the preload on the wear-resistant plate from the elastic support member is Fb, the elastic coefficient of the elastic support member is k, and the depth of the step groove is h; wherein, Fa, Fb, and k satisfy: (Fa-Fb) / (k×h)>σ, and σ>1.

[0018] Assuming that the elastic support has not undergone pre-deformation, the wear-resistant sheet will compress the elastic support under the action of the working load, causing it to undergo an elastic deformation of Fa / k. Since the elastic support has undergone pre-deformation, a pre-pressure is applied to the wear-resistant sheet, which is equivalent to an elastic deformation of Fb / k. Therefore, (Fa-Fb) / k represents the actual elastic deformation of the elastic support caused by the wear-resistant sheet compressing the elastic support under the action of the working load. Since (Fa-Fb) / (k×h)>σ, and σ>1, (Fa-Fb) / k>h can be obtained by conversion. This ensures that the wear-resistant sheet has sufficient deformation amplitude under the action of the working load, thereby ensuring that there will be no rigid impact between the wear-resistant sheet and the sliding bearing.

[0019] In the above technical solution, the annular limiting portion is provided with an anti-rotation portion, and the wear-resistant plate is provided with a stop protrusion. The anti-rotation portion and the stop protrusion are engaged with each other along the circumference of the rotor to limit the wear-resistant plate from rotating relative to the rotor.

[0020] The cooperation between the anti-rotation part and the stop protrusion can prevent the wear-resistant plate from rotating relative to the rotor during operation, causing it to disengage from the cooperation with the stop protrusion and fall out of the annular limit part, thereby improving the stability and reliability of the wear-resistant plate and the elastic support.

[0021] In the above technical solution, the anti-rotation portion is connected to one end of the stop protrusion and is surrounded to form an accommodating space. The stop protrusion is suitable for rotating into or out of the accommodating space, and the stop protrusion is in a stop-butt fit with the stop protrusion.

[0022] The stop protrusion not only cooperates with the stop protrusion to limit the axial position of the wear-resistant plate, but also cooperates with the anti-rotation portion to prevent the wear-resistant plate from rotating, thereby combining the two stop-coupling structures of the wear-resistant plate and the limiting structure into one. At the same time, the anti-rotation portion and the stop protrusion of the limiting structure are also connected as one. This simplifies both the structure of the wear-resistant plate and the limiting structure. At the same time, this solution also reduces the size of the main body, which helps prevent frictional interference between the wear-resistant plate and the limiting structure during assembly. Specifically, during assembly, the stop protrusion of the wear-resistant plate is staggered with the stop protrusion, the wear-resistant plate is installed in the annular limiting portion, and then the wear-resistant plate is rotated so that the stop protrusion of the wear-resistant plate rotates into the accommodating space until the wear-resistant plate cooperates with the anti-rotation portion. The stop protrusion is then blocked by the stop protrusion, and the wear-resistant plate cannot reverse over the stop protrusion and escape from the annular limiting portion without any external force.

[0023] In the above technical solution, the direction in which the stop protrusion rotates into the accommodating space is opposite to the rotation direction of the rotor.

[0024] In this way, during the operation of the system, when the rotor rotates, it will drive the anti-rotation part to rotate in the direction close to the corresponding stop protrusion, thereby preventing the wear-resistant plate from escaping from the accommodation space in the opposite direction, improving the stability and reliability of the wear-resistant plate and the elastic support member, and ensuring that the wear-resistant plate and the rotor rotate synchronously.

[0025] In any of the above technical solutions, the wear-resistant sheet and the rotor are sleeved on the rotating shaft, and the wear-resistant sheet and the rotating shaft are loosely matched.

[0026] The wear-resistant sheet and the rotor are sleeved on the rotating shaft, and the wear-resistant sheet and the rotating shaft are clearance-matched, which ensures that the axial floating of the wear-resistant sheet will not be interfered by the rotating shaft, and can float axially as needed under the support of the elastic support.

[0027] In the above technical solution, the radial gap between the rotating shaft and the wear-resistant plate is smaller than the radial gap between the wear-resistant plate and the limiting structure.

[0028] When the radial clearance between the rotating shaft and the wear-resistant plate is smaller than the radial clearance between the wear-resistant plate and the limiting structure, the wear-resistant plate can only contact the rotating shaft at most when moving radially, and cannot interfere with the limiting structure radially. This not only protects the limiting structure, but also effectively prevents the wear-resistant plate from radially interfering with the limiting structure and affecting the axial floating of the wear-resistant plate. It can also prevent the wear-resistant plate from interfering with the limiting structure during assembly, causing assembly inconvenience, thereby facilitating the quick and smooth installation of the wear-resistant plate.

[0029] In the above technical solution, the rotating shaft is connected to the rotor and rotates synchronously.

[0030] The shaft and the rotor can be fixedly connected by injection molding to achieve synchronous rotation. Of course, the shaft and the rotor can also be loosely matched and rotate asynchronously, such as the shaft is fixed and the rotor rotates around the rotor.

[0031] In any of the above technical solutions, a plurality of dynamic balancing mounting holes are provided on the limiting structure.

[0032] Multiple dynamic balancing mounting holes are provided on the retaining structure. During subsequent dynamic balancing tests, these holes can be filled with material as needed to improve the dynamic balance of the rotor assembly. This solution also helps conserve raw materials and reduce production costs. Furthermore, the dynamic balancing mounting holes are evenly distributed throughout the annular retaining portion.

[0033] In any of the above technical solutions, a mounting groove is provided on the end surface of the rotor facing the wear-resistant plate, and a portion of the elastic support member is limited in the mounting groove.

[0034] The provision of the mounting groove is beneficial to increasing the axial dimension of the elastic support member, thereby improving the elastic support effect, and on the other hand, it also improves the position stability of the elastic support member, which is beneficial to preventing the elastic support member from shifting, tilting, etc.

[0035] In any of the above technical solutions, the elastic support member includes any one or any combination of an elastic body, a spring and a spring; and / or the projection of the elastic support member on the end surface of the rotor is circular or polygonal.

[0036] The elastic body, spring and spring sheet all have good elastic deformation ability, can play a good elastic supporting role for the wear-resistant sheet, and have a simple structure and low cost. Specifically, the elastic body can be but not limited to: a rubber pad, a rubber ring, a rubber block, etc.

[0037] The projection of the elastic support member on the end surface of the rotor can be circular, polygonal, or irregular in shape, and can be adjusted as needed.

[0038] In any of the above technical solutions, the rotor includes: a rotor core, which is provided with an axial hole for accommodating a rotating shaft and a receiving groove for installing a permanent magnet; a permanent magnet, which is arranged in the receiving groove; and a shell, which at least covers the end face of the rotor core to encapsulate the permanent magnet in the rotor core, and one end face of the shell forms the end face of the rotor facing the wear-resistant plate.

[0039] The rotor includes a rotor core, a permanent magnet and a shell. The rotor core is sleeved on the rotating shaft, the permanent magnet is installed in the rotor core, and the shell encapsulates the permanent magnet in the rotor core. The limiting structure is provided on the shell to limit the axial position of the wear-resistant plate.

[0040] In the above technical solution, the shell is a plastic-encapsulated body, the plastic-encapsulated body covers the rotor core, and the limiting structure and the plastic-encapsulated body are an integrated structure.

[0041] The shell is plastic-coated, which is convenient for processing and forming, and is also convenient for connection with the rotor core. It is also convenient for integrally forming a limiting structure as needed, which is beneficial to reducing the processing difficulty of the limiting structure and reducing production costs.

[0042] In any of the above technical solutions, the limiting structure is provided with a positioning portion for directly or indirectly positioning the position of the permanent magnet.

[0043] The positioning part can directly or indirectly position the permanent magnet in the rotor core, and the magnetization position of the permanent magnet can be accurately positioned according to the position of the permanent magnet, thereby improving the accuracy of subsequent magnetization and ensuring that the permanent magnet is fully magnetized.

[0044] The technical solution of the second aspect of the present invention provides a motor, comprising: a rotor assembly as described in any one of the technical solutions of the first aspect; and a stator assembly, which is sleeved on the rotor assembly and cooperates with the rotor assembly.

[0045] The motor provided by the technical solution of the second aspect of the present invention includes the rotor assembly described in any one of the technical solutions of the first aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0046] The technical solution of the third aspect of the present invention provides a water pump, comprising: the motor as described in the technical solution of the second aspect; and a pump body, wherein the pump body is connected to the motor.

[0047] The water pump provided by the technical solution of the third aspect of the present invention includes the motor described in the technical solution of the second aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0048] In the above technical solution, the pump body includes: a pump casing; a casing, the end of which is connected to the pump casing to form a pump casing chamber; an impeller, housed in the pump casing chamber; a base and a controller, connected to the bottom of the casing; an isolation sleeve, which cooperates with the casing and the base respectively through a sealing ring to separate the space in the casing into a water-flowing chamber and a non-water-flowing chamber; a sliding bearing, which is sleeved on the rotating shaft of the rotor assembly and is arranged opposite to the wear-resistant plate of the rotor assembly; wherein the sliding bearing is installed in the bearing hole of the casing; the stator assembly of the motor is installed in the non-water-flowing chamber; the rotor assembly of the motor is installed in the water-flowing chamber; and the rotor assembly is in contact with the sliding bearing.

[0049] These structures ensure the normal operation of the water pump, and there will be no rigid impact between the wear-resistant plate and the sliding bearing during the operation of the water pump. The wear of the wear-resistant plate and the sliding bearing is greatly improved, and the operating noise of the water pump is reduced accordingly.

[0050] The technical solution of the fourth aspect of the present invention provides a vehicle, comprising: a vehicle body; and a water pump as described in any one of the technical solutions of the third aspect, installed in the vehicle body.

[0051] The vehicle provided by the technical solution of the fourth aspect of the present invention includes the water pump described in the technical solution of the third aspect, and thus has all the beneficial effects of any of the above technical solutions, which will not be repeated here.

[0052] Additional aspects and advantages of the invention will become apparent from the description which follows, or may be learned by practice of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0054] Figure 1 is a schematic diagram of the three-dimensional structure of a rotor assembly according to some embodiments of the present invention;

[0055] Figure 2 yes Figure 1 A schematic diagram of the top view of the rotor assembly shown;

[0056] Figure 3 yes Figure 1 Schematic diagram of the three-dimensional structure of the middle rotor;

[0057] Figure 4 yes Figure 3 A schematic diagram of the top view of the rotor shown;

[0058] Figure 5 is included Figure 1 A schematic cross-sectional view of the water pump of the rotor assembly shown;

[0059] Figure 6 is a schematic diagram of the three-dimensional structure of the rotor assembly according to other embodiments of the present invention;

[0060] Figure 7 yes Figure 6 A schematic diagram of the top view of the rotor assembly shown;

[0061] Figure 8 yes Figure 6 The schematic diagram of the main structure of the rotor assembly shown;

[0062] Figure 9 yes Figure 6Schematic diagram of the three-dimensional structure of the middle rotor;

[0063] Figure 10 yes Figure 6 Schematic diagram of the three-dimensional structure of the middle wear-resistant plate;

[0064] Figure 11 yes Figure 10 A schematic diagram of the top view of the wear-resistant sheet shown;

[0065] Figure 12 is included Figure 6 A schematic cross-sectional view of the water pump of the rotor assembly shown;

[0066] Figure 13 is a schematic diagram of the three-dimensional structure of the rotor assembly according to some embodiments of the present invention;

[0067] Figure 14 yes Figure 13 Schematic diagram of the three-dimensional structure of the middle rotor;

[0068] Figure 15 yes Figure 13 Schematic diagram of the three-dimensional structure of the middle wear-resistant plate;

[0069] Figure 16 is included Figure 13 A schematic cross-sectional view of the water pump of the rotor assembly shown;

[0070] Figure 17 1 is a schematic top view of the structure of a water pump according to an embodiment of the present invention;

[0071] Figure 18 is a schematic block diagram of a motor according to an embodiment of the present invention;

[0072] Figure 19 is a schematic block diagram of a vehicle according to an embodiment of the present invention.

[0073] in, Figures 1 to 19 The corresponding relationship between the reference numerals and component names is as follows:

[0074] 100 rotor assembly, 1 rotating shaft, 2 wear-resistant sheet, 21 avoidance notch, 22 step groove, 23 radial gap, 24 main body, 25 stop protrusion, 3 rotor, 31 rotor core, 311 shaft hole, 32 permanent magnet, 33 plastic-coated body, 331 mounting groove, 34 limiting structure, 341 first stopper, 3411 buckle, 3412 guide inclined surface, 3413 stop surface, 342 second stopper, 343 annular limiting portion, 3431 through hole, 3432 stop protrusion, 3433 anti-rotation portion, 3434 accommodation space, 4 elastic support member;

[0075] 200 motor, 202 stator assembly;

[0076] 300 water pump, 302 pump casing, 304 casing, 306 impeller, 308 base and controller, 310 sliding bearing, 312 water flow chamber, 314 non-water flow chamber, 316 isolation sleeve, 318 pump body;

[0077] 400 vehicles, 402 vehicle bodies. DETAILED DESCRIPTION

[0078] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0079] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0080] Refer to the following Figures 1 to 19 A rotor assembly, a motor, a water pump, and a vehicle according to some embodiments of the present invention are described.

[0081] like Figure 1 、 Figure 6 and Figure 13 As shown, the rotor assembly 100 provided by the embodiment of the first aspect of the present invention includes: a wear-resistant plate 2, a rotor 3 and an elastic support member 4.

[0082] Specifically, the end surface of the rotor 3 facing the wear-resistant plate 2 is provided with a limiting structure 34, such as Figure 1 As shown, the limiting structure 34 includes at least one stop protrusion 3432 , which is used to engage with the end of the wear-resistant plate 2 away from the rotor 3 to limit the axial position of the wear-resistant plate 2 .

[0083] The elastic support member 4 is sandwiched between the wear-resistant plate 2 and the end surface of the rotor 3. Figure 1 As shown, it is used to elastically support the wear-resistant plate 2.

[0084] The rotor assembly 100 provided in the embodiment of the first aspect of the present invention has an elastic support member 4 added between the wear-resistant plate 2 and the end face of the rotor 3. Since the elastic support member 4 has a compressible adjustment function, the wear-resistant plate 2 can float axially during operation, thereby avoiding rigid impact between the wear-resistant plate 2 and the sliding bearing 310, and greatly improving the wear between the wear-resistant plate 2 and the sliding bearing 310, thereby reducing system noise, extending product life, and improving product work efficiency.

[0085] At the same time, under the restriction of the stop protrusion 3432 of the limiting structure 34, the wear-resistant plate 2 cannot be tightly pressed against the sliding bearing 310 under the elastic force of the elastic support member 4, which is conducive to reducing the axial extrusion force between the wear-resistant plate 2 and the sliding bearing 310, preventing excessive axial extrusion force between the wear-resistant plate 2 and the sliding bearing 310, and further improving the wear between the wear-resistant plate 2 and the sliding bearing 310, further reducing system noise, and further extending product life.

[0086] In addition, the provision of the limiting structure 34 can also prevent the elastic support member 4 from separating from the rotor 3, thereby improving the stability and reliability of the product.

[0087] The stop protrusion 3432 may be an annular protrusion extending along the circumference of the rotor, or may be one or more protrusions spaced apart along the circumference of the rotor.

[0088] It is understandable that the wear-resistant sheet 2 may also be referred to as a gasket, and the material may be, but is not limited to, ceramic, metal, or alloy.

[0089] Some embodiments are described below with reference to the accompanying drawings.

[0090] Example 1

[0091] The limiting structure 34 includes: at least one first stopper 341, such as Figure 1 and Figure 3 One end of the first stopper 341 is connected to the end surface of the rotor 3, and the other end of the first stopper 341 is provided with a stopper protrusion 3432, which is configured as a buckle 3411, as shown. Figure 2 and Figure 4 As shown, the buckle 3411 is used to engage with the end of the wear-resistant plate 2 away from the rotor 3.

[0092] The buckle 3411 of the first stop block 341 is provided at the end of the first stop block 341 away from the rotor 3, and is used to stop and cooperate with the end of the wear-resistant plate 2 away from the rotor 3, so that the wear-resistant plate 2 is clamped between the elastic support member 4 and the buckle 3411. Under the obstruction of the buckle 3411, the wear-resistant plate 2 cannot pass through the buckle 3411 along the axial direction, thereby limiting the axial position of the wear-resistant plate 2. When the wear-resistant plate 2 is impacted by the sliding bearing 310, the wear-resistant plate 2 can compress the elastic support member 4 and move toward the direction close to the rotor 3, thereby preventing a rigid impact between the wear-resistant plate 2 and the sliding bearing 310.

[0093] Furthermore, it can prevent the elastic support member 4 and the wear-resistant sheet 2 from falling out from the gap between the buckle 3411 and the rotor 3, thereby improving the stability and reliability of the product.

[0094] At the same time, the first stopper 341 has a relatively simple structure and a relatively small size, which is beneficial to reducing the use of raw materials, lowering product costs, and reducing product weight.

[0095] Specifically, the buckle 3411 includes a guide slope 3412 and a stop surface 3413. Figure 3 As shown, the guide slope 3412 is used to guide the wear-resistant sheet 2 over the buckle 3411, and the stop surface 3413 is used to engage with the wear-resistant sheet 2. During assembly, the wear-resistant sheet 2 can pass over the buckle 3411 along the guide slope 3412 of the buckle 3411 and then enter the space between the buckle 3411 and the rotor 3. The stop surface 3413 of the buckle 3411 prevents the wear-resistant sheet 2 from passing over the buckle 3411 in the reverse direction and escaping.

[0096] Furthermore, when there are multiple first stoppers 341, the multiple first stoppers 341 are spaced apart along the circumference of the rotor 3, such as Figure 2 and Figure 4 This is beneficial to the balanced force on the wear-resistant sheet 2, thereby improving the stability and reliability of the wear-resistant sheet 2.

[0097] Furthermore, the limiting structure 34 further includes: at least one second stopper 342, such as Figure 1 and Figure 3 The second stopper 342 and the first stopper 341 are spaced apart along the circumference of the end surface, as shown. Figure 2 and Figure 4 shown.

[0098] The provision of the second stopper 342 further limits the wear-resistant plate 2 and the elastic support member 4. The second stopper 342 cooperates with the first stopper 341 to restrict the circumferential position of the wear-resistant plate 2, thereby preventing the wear-resistant plate 2 from rotating relative to the rotor 3, thereby ensuring synchronous rotation of the wear-resistant plate 2 and the rotor 3. It also helps prevent radial displacement and tilting of the elastic support member 4, thereby improving the stability and reliability of the elastic support member 4.

[0099] There are multiple first blocks 341, and the number of second blocks 342 is equal to the number of first blocks 341. Figure 2 and Figure 4 As shown, the plurality of first stops 341 and the plurality of second stops 342 are staggeredly distributed along the circumferential direction of the end surface.

[0100] The multiple first stops 341 and the multiple second stops 342 are alternately distributed in an ABAB manner, which is beneficial to the balanced force on the wear-resistant plate 2, thereby further improving the stability and reliability of the wear-resistant plate 2 and the elastic support member 4.

[0101] Furthermore, there is a radial gap 23 between at least one of the first stopper 341 and the second stopper 342 and the wear-resistant plate 2, such as Figure 2 shown.

[0102] There is a radial gap 23 between the first stop block 341 and the wear-resistant plate 2, that is, there is a gap between the outer peripheral surface of the wear-resistant plate 2 and the inner side surface of the first stop block 341. This is beneficial to reducing the deformation of the buckle 3411 during the assembly of the wear-resistant plate 2, and preventing the wear-resistant plate 2 from frictionally interfering with the inner side surface of the first stop block 341, thereby improving the smoothness of the installation of the wear-resistant plate 2, reducing the difficulty of assembly, and improving the assembly efficiency. It can also prevent the wear-resistant plate 2 from frictionally interfering with the inner side surface of the first stop block 341 during use, which affects the axial floating of the wear-resistant plate 2.

[0103] There is a radial gap 23 between the second stop block 342 and the wear-resistant plate 2, that is, there is a gap between the outer peripheral surface of the wear-resistant plate 2 and the inner side surface of the second stop block 342. This is conducive to preventing friction interference between the wear-resistant plate 2 and the second stop block 342 during the assembly process of the wear-resistant plate 2, thereby improving the smoothness of the installation of the wear-resistant plate 2, reducing the difficulty of assembly, improving assembly efficiency, and preventing friction interference between the wear-resistant plate 2 and the inner side surface of the second stop block 342 during use, which affects the axial floating of the wear-resistant plate 2.

[0104] Example 2

[0105] The limiting structure 34 includes: an annular limiting portion 343, such as Figure 6 、 Figure 7 and Figure 8 One end of the annular limiting portion 343 is connected to the end surface of the rotor 3, and the other end of the annular limiting portion 343 is provided with at least one stop protrusion 3432, as shown. Figure 6 As shown, the annular limiting portion 343 is sleeved on the outside of the wear-resistant plate 2.

[0106] The stop protrusion 3432 is provided at the end of the annular limit portion 343 away from the rotor 3, and is used to stop and cooperate with the end of the wear-resistant plate 2 away from the rotor 3, so that the wear-resistant plate 2 is clamped between the elastic support 4 and the stop protrusion 3432. Under the obstruction of the stop protrusion 3432, the wear-resistant plate 2 cannot pass through the stop protrusion 3432 along the axial direction, thereby limiting the axial position of the wear-resistant plate 2. When the wear-resistant plate 2 is impacted by the sliding bearing 310, the wear-resistant plate 2 can compress the elastic support 4 and move toward the direction close to the rotor 3, thereby preventing rigid impact between the wear-resistant plate 2 and the sliding bearing 310.

[0107] Furthermore, it can prevent the elastic support member 4 and the wear-resistant sheet 2 from falling out from the gap between the stop protrusion 3432 and the rotor 3, thereby improving the stability and reliability of the product.

[0108] At the same time, the annular limit portion 343 can also provide circumferential restrictions on the wear-resistant plate 2 and the elastic support member 4, which is beneficial to prevent the wear-resistant plate 2 and the elastic support member 4 from radial displacement, tilting, etc., and further improve the stability and reliability of the wear-resistant plate 2 and the elastic support member 4.

[0109] Furthermore, the wear-resistant sheet 2 is provided with an avoidance notch 21 for avoiding the stop protrusion 3432, as shown in FIG. Figure 10 and Figure 11 The wear-resistant sheet 2 is adapted to rotate relative to the annular limiting portion 343 so that the avoidance notch 21 and the stop protrusion 3432 are staggered.

[0110] Providing the avoidance notch 21 on the wear-resistant sheet 2 enables interference-free assembly of the wear-resistant sheet 2, which helps reduce the difficulty of assembling the wear-resistant sheet 2 and thus improves assembly efficiency. Specifically, during assembly, the avoidance notch 21 of the wear-resistant sheet 2 is aligned with the stop protrusion 3432, the wear-resistant sheet 2 is installed into the annular limit portion 343, and then the wear-resistant sheet 2 is rotated so that the avoidance notch 21 of the wear-resistant sheet 2 is staggered with the stop protrusion 3432. The wear-resistant sheet 2 is then blocked by the stop protrusion 3432 and cannot reversely cross the stop protrusion 3432 and escape from the annular limit portion 343 without any external force.

[0111] Of course, the avoidance notch 21 may be eliminated, and the wear-resistant sheet 2 may be assembled by applying external force to squeeze and pass over the stop protrusion 3432 .

[0112] Furthermore, the wear-resistant sheet 2 is provided with a step groove 22, such as Figure 10 and Figure 11 The stop protrusion 3432 is at least partially embedded in the step groove 22, as shown. Figure 6 and Figure 7 shown.

[0113] The setting of the step groove 22 makes the end face of the wear-resistant plate 2 facing away from the rotor 3 not a complete plane, but has high and low levels and a concave structure. The stop protrusion 3432 and the wear-resistant plate 2 form a concave-convex matching structure, which can prevent the wear-resistant plate 2 from rotating relative to the rotor 3 during operation, causing it to disengage from the stop protrusion 3432 and fall out of the annular limit portion 343, thereby improving the stability and reliability of the wear-resistant plate 2 and the elastic support member 4.

[0114] The working load on the wear-resistant plate 2 is Fa, the preload of the elastic support member 4 on the wear-resistant plate 2 is Fb, the elastic coefficient of the elastic support member 4 is k, and the depth of the step groove 22 is h. Fa, Fb, and k satisfy: (Fa-Fb) / (k×h)>σ, σ>1, and σ is a constant.

[0115] Assuming that the elastic support member 4 has not undergone pre-deformation, the wear-resistant plate 2 will compress the elastic support member 4 under the action of the working load, causing it to undergo an elastic deformation of Fa / k. Since the elastic support member 4 has undergone pre-deformation, a pre-pressure is applied to the wear-resistant plate 2, which is equivalent to an elastic deformation of Fb / k. Therefore, (Fa-Fb) / k represents the actual elastic deformation of the elastic support member 4 caused by the wear-resistant plate 2 compressing the elastic support member 4 under the action of the working load. Since (Fa-Fb) / (k×h)>σ, and σ>1, (Fa-Fb) / k>h can be obtained by conversion. This ensures that the wear-resistant plate 2 has sufficient deformation amplitude under the action of the working load, thereby ensuring that the wear-resistant plate 2 and the sliding bearing 310 will not undergo rigid impact.

[0116] Specifically, the wear-resistant sheet 2 is circular in shape as a whole. Figure 11 As shown. The annular limiting portion 343 is circular, as shown Figure 7 There are two stop protrusions 3432, and the two stop protrusions 3432 are rotationally symmetrical along the central axis of the annular limiting portion 343, as shown. Figure 7 As shown. The number of the avoidance gaps 21 is two and corresponds to the two stop protrusions 3432 one by one. Figure 7 As shown. The number of step grooves 22 is two and corresponds to the two stop protrusions 3432 one by one. Figure 11 This is beneficial to the balanced force on the wear-resistant sheet 2 and further improves the stability and reliability of the wear-resistant sheet 2 and the elastic support member 4.

[0117] Example 3

[0118] The limiting structure 34 includes: an annular limiting portion 343, such as Figure 13 and Figure 14 One end of the annular limiting portion 343 is connected to the end surface of the rotor 3, and the other end of the annular limiting portion 343 is provided with at least one stop protrusion 3432, as shown. Figure 13 As shown, the annular limiting portion 343 is sleeved on the outside of the wear-resistant plate 2 , and the stop protrusion 3432 is used to stop and cooperate with the end of the wear-resistant plate 2 away from the rotor 3 .

[0119] The stop protrusion 3432 is provided at the end of the annular limit portion 343 away from the rotor 3, and is used to stop and cooperate with the end of the wear-resistant plate 2 away from the rotor 3, so that the wear-resistant plate 2 is clamped between the elastic support member 4 and the stop protrusion 3432. Under the obstruction of the stop protrusion 3432, the wear-resistant plate 2 cannot pass over the stop protrusion 3432 along the rotating shaft 1, thereby limiting the axial position of the wear-resistant plate 2. When the wear-resistant plate 2 is impacted by the sliding bearing 310, the wear-resistant plate 2 can compress the elastic support member 4 and move toward the direction close to the rotor 3, thereby preventing rigid impact between the wear-resistant plate 2 and the sliding bearing 310.

[0120] Furthermore, it can prevent the elastic support member 4 and the wear-resistant sheet 2 from falling out from the gap between the stop protrusion 3432 and the rotor 3, thereby improving the stability and reliability of the product.

[0121] At the same time, the annular limit portion 343 can also provide circumferential restrictions on the wear-resistant plate 2 and the elastic support member 4, which is beneficial to prevent the wear-resistant plate 2 and the elastic support member 4 from radial displacement, tilting, etc., and further improve the stability and reliability of the wear-resistant plate 2 and the elastic support member 4.

[0122] Furthermore, the annular limiting portion 343 is provided with an anti-rotation portion 3433, such as Figure 14 As shown. The wear-resistant plate 2 is provided with a stop convex block 25, as shown Figure 15 The anti-rotation portion 3433 and the stop protrusion 25 are engaged with each other along the circumference of the rotor 3 to limit the wear-resistant plate 2 from rotating relative to the rotor 3 .

[0123] The cooperation between the anti-rotation portion 3433 and the stop protrusion 25 can prevent the wear-resistant plate 2 from rotating relative to the rotor 3 during operation, causing it to disengage from the cooperation with the stop protrusion 3432 and fall out of the annular limiting portion 343, thereby improving the stability and reliability of the wear-resistant plate 2 and the elastic support member 4.

[0124] Furthermore, the anti-rotation portion 3433 is connected to one end of the stop protrusion 3432 and is surrounded to form an accommodating space 3434. Figure 15 The stop protrusion 25 is adapted to rotate into or out of the accommodation space 3434 , and the stop protrusion 3432 is in a stop-coupling engagement with the stop protrusion 25 .

[0125] The stop protrusion 25 not only cooperates with the stop protrusion 3432 to limit the axial position of the wear-resistant plate 2, but also cooperates with the anti-rotation portion 3433 to prevent the wear-resistant plate 2 from rotating. This integrates the two stop-coupling structures of the wear-resistant plate 2 and the limiting structure 34 into one, and also integrates the anti-rotation portion 3433 and the stop protrusion 3432 of the limiting structure 34. This simplifies the structure of both the wear-resistant plate 2 and the limiting structure 34.

[0126] At the same time, this solution also reduces the size of the main body 24, which is helpful in preventing friction interference between the wear-resistant sheet 2 and the limiting structure 34 during the assembly process.

[0127] Specifically, during assembly, the stop protrusion 25 of the wear-resistant plate 2 is staggered with the stop protrusion 3432, the wear-resistant plate 2 is installed into the annular limiting portion 343, and then the wear-resistant plate 2 is rotated so that the stop protrusion 25 of the wear-resistant plate 2 is rotated into the accommodating space 3434 until the wear-resistant plate 2 is stopped and engaged with the anti-rotation portion 3433, and is then blocked by the stop protrusion 3432. The wear-resistant plate 2 cannot reversely cross the stop protrusion 3432 and escape from the annular limiting portion 343 without any external force.

[0128] Furthermore, the direction in which the stop protrusion 25 rotates into the accommodating space 3434 is opposite to the rotation direction of the rotor 3 .

[0129] In this way, during the operation of the system, when the rotor 3 rotates, it will drive the anti-rotation part 3433 to rotate in the direction close to the corresponding stop protrusion 25, thereby preventing the wear-resistant plate 2 from falling out of the accommodating space 3434 in the opposite direction, thereby improving the stability and reliability of the wear-resistant plate 2 and the elastic support member 4, and ensuring that the wear-resistant plate 2 and the rotor 3 rotate synchronously.

[0130] Specifically, the main body 24 is circular. Figure 15 As shown. The annular limiting portion 343 is circular, as shown Figure 13 As shown. The number of the stop protrusions 25 is two, as shown Figure 15 As shown, the two stop protrusions 25 are rotationally symmetrical along the central axis of the main body 24. The number of the stop protrusions 3432 is two, as shown in FIG. Figure 13 As shown, and corresponding to the two stop protrusions 25 one by one, the number of the anti-rotation parts 3433 is two and corresponds to the two stop protrusions 25 one by one. This is conducive to the balanced force of the wear-resistant sheet 2, and further improves the stability and reliability of the wear-resistant sheet 2 and the elastic support member 4.

[0131] The stop protrusion 25 is roughly fan-shaped. Figure 15 As shown, it is beneficial to increase the size of the stop protrusion 25 and improve the matching reliability with the accommodating space 3434.

[0132] Furthermore, a chamfer is provided at the entry end of the stop protrusion 25 (i.e., the end where the stop protrusion 25 and the anti-rotation portion abut against each other) or the entry end of the stop protrusion 3432, and the chamfer forms a guiding slope to facilitate the stop protrusion 25 to quickly and smoothly enter the accommodating space 3434.

[0133] In any of the above embodiments, the wear-resistant sheet 2 and the rotor 3 are sleeved on the rotating shaft 1 , and the wear-resistant sheet 2 and the rotating shaft 1 are clearance-fitted.

[0134] The wear-resistant plate 2 and the rotor 3 are sleeved on the rotating shaft 1, and the wear-resistant plate 2 and the rotating shaft 1 are clearance-matched, ensuring that the axial floating of the wear-resistant plate 2 will not be interfered by the rotating shaft 1, and can float axially as needed under the support of the elastic support 4.

[0135] In the above embodiment, the radial gap between the rotating shaft 1 and the wear-resistant plate 2 is smaller than the radial gap between the wear-resistant plate 2 and the limiting structure 34 .

[0136] When the radial clearance between the rotating shaft 1 and the wear-resistant plate 2 is smaller than the radial clearance between the wear-resistant plate 2 and the limiting structure 34, the wear-resistant plate 2 can only contact the rotating shaft 1 at most when moving radially, and cannot interfere with the limiting structure 34 radially. This not only protects the limiting structure 34, but also effectively prevents radial interference between the wear-resistant plate 2 and the limiting structure 34, resulting in problems such as jamming or even stuck, thereby ensuring the reliability of the axial floating of the wear-resistant plate 2.

[0137] At the same time, such an arrangement can also prevent the wear-resistant sheet 2 from interfering with the limiting structure 34 during the assembly process, which would cause assembly inconvenience, thereby facilitating quick and smooth installation of the wear-resistant sheet 2.

[0138] In the above embodiment, the rotating shaft 1 is connected to the rotor 3 and rotates synchronously.

[0139] The shaft 1 and the rotor 3 can be fixedly connected by injection molding to achieve synchronous rotation. Of course, the shaft 1 and the rotor 3 can also be clearance-fitted and rotate asynchronously, such as the shaft 1 is fixed and the rotor 3 rotates around the shaft 1.

[0140] In any of the above embodiments, a plurality of dynamic balancing mounting holes are provided on the limiting structure 34 .

[0141] Multiple dynamic balancing mounting holes are provided on the retaining structure 34. During subsequent dynamic balancing testing, these holes can be filled with material as needed to improve the dynamic balance of the rotor assembly 100. This solution also helps conserve raw materials and reduce production costs. Furthermore, the dynamic balancing mounting holes are evenly distributed throughout the annular retaining portion 343.

[0142] In any of the above embodiments, the end surface of the rotor 3 facing the wear-resistant plate 2 is provided with a mounting groove 331, such as Figure 9 and Figure 14 As shown. A portion of the elastic support member 4 is limited in the mounting groove 331, as shown Figure 5 、 Figure 12 and Figure 16 shown.

[0143] The setting of the mounting groove 331 is beneficial to increasing the axial dimension of the elastic support member 4, thereby improving the elastic support effect, and on the other hand, it also improves the position stability of the elastic support member 4, which is beneficial to preventing the elastic support member 4 from shifting, tilting, etc.

[0144] In any of the above embodiments, the elastic support member 4 includes any one or any combination of an elastic body, a spring and a spring.

[0145] The elastic body, spring and spring piece all have good elastic deformation ability, can play a good elastic supporting role for the wear-resistant sheet 2, and have a simple structure and low cost.

[0146] Specifically, the elastic body may be, but is not limited to, a rubber pad, a rubber ring, a rubber block, etc. The rubber pad is an annular pad, flat, and has a rectangular or nearly rectangular cross-section; the rubber ring has a circular or nearly circular cross-section; and the rubber block is a solid structure, and multiple rubber blocks may be provided at intervals along the circumference of the rotor 3 to elastically support the wear-resistant sheet 2. The shape of a single rubber block is not limited, and may be cylindrical, prismatic, spherical, or the like.

[0147] Of course, the type of the elastic supporting member 4 is not limited thereto.

[0148] In any of the above embodiments, the projection of the elastic support member 4 on the end surface of the rotor 3 is in the shape of a circle or a polygon.

[0149] The projection of the elastic support member 4 on the end surface of the rotor 3 can be circular, polygonal (such as rectangular, square, pentagonal, hexagonal, etc.), or irregular, and can be adjusted as needed.

[0150] In any of the above embodiments, the rotor 3 includes: a rotor core 31, a permanent magnet 32 and a housing. Figure 5 、 Figure 12 and Figure 16 Specifically, the rotor core 31 is provided with an axial hole 311 for receiving the rotating shaft 1 and a receiving slot for mounting the permanent magnet 32. The permanent magnet 32 is disposed within the receiving slot. The housing covers at least the end surface of the rotor core 31 to encapsulate the permanent magnet 32 within the rotor core 31. One end surface of the housing forms the end surface of the rotor 3 facing the wear-resistant plate 2.

[0151] The rotor 3 includes a rotor core 31, a permanent magnet 32 and a shell. The rotor core 31 is sleeved on the rotating shaft 1, and the permanent magnet 32 is installed in the rotor core 31. The shell encapsulates the permanent magnet 32 in the rotor core 31. The limiting structure 34 is provided on the shell to limit the axial position of the wear-resistant plate 2.

[0152] The outer shell is a plastic package 33, such as Figure 5 、 Figure 12 and Figure 16 As shown, the overmolded body 33 covers the rotor core 31 , and the limiting structure 34 and the overmolded body 33 are an integrated structure.

[0153] The outer shell is formed of a plastic-coated body 33, which facilitates processing and connection with the rotor core 31. It also facilitates the integrated molding of the retaining structure 34 as needed, which helps reduce the processing difficulty and production costs of the retaining structure 34. Furthermore, in the embodiment in which the retaining structure 34 includes an annular retaining portion 343 with a stop protrusion 3432 provided thereon, a through hole 3431 is provided on the side wall of the annular retaining portion 343 corresponding to the stop protrusion 3432 to facilitate injection molding.

[0154] Of course, the housing is not limited to the plastic body 33, and may also be a stainless steel or plastic frame, etc. The permanent magnet 32 is magnetic steel.

[0155] In any of the above embodiments, the limiting structure 34 is provided with a positioning portion for directly or indirectly positioning the position of the permanent magnet 32 .

[0156] The positioning portion can directly or indirectly position the permanent magnet 32 in the rotor core 31 , and the magnetization position of the permanent magnet 32 can be accurately positioned according to the position of the permanent magnet 32 , thereby improving the accuracy of subsequent magnetization and ensuring that the permanent magnet 32 is fully magnetized.

[0157] In the first embodiment, the first stopper 341 and the second stopper 342 can serve as positioning parts. During assembly, the positions of the first stopper 341 and the second stopper 342 can be aligned with the position of the permanent magnet 32. In addition, a contouring tool can be provided to ensure that the contoured magnetizing tool is accurately matched with the first stopper 341.

[0158] For the second and third embodiments, the stop protrusion 3432 can be used as a positioning portion, and during the assembly process, the position of the stop protrusion 3432 can be made to correspond to the position of the permanent magnet 32. In addition, a contoured tooling can be provided to ensure that the contoured magnetizing tooling accurately matches the stop protrusion 3432.

[0159] The motor 200 provided by the embodiment of the second aspect of the present invention is as follows: Figure 18 As shown, it comprises: a rotor assembly 100 as in any one of the embodiments of the first aspect and a stator assembly 202. The stator assembly 202 is sleeved on the rotor assembly 100 and matched with the rotor assembly 100.

[0160] The motor 200 provided in the embodiment of the second aspect of the present invention includes the rotor assembly 100 of any one of the embodiments of the first aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0161] The water pump 300 provided by the embodiment of the third aspect of the present invention is as follows: Figure 17 As shown, it includes: a motor 200 and a pump body 318 as in the second embodiment, and the pump body 318 is connected to the motor 200.

[0162] The water pump 300 provided in the embodiment of the third aspect of the present invention includes the motor 200 of the embodiment of the second aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0163] Specifically, the pump body 318 includes: a pump casing 302, a casing 304, an impeller 306, a base and controller 308, an isolation sleeve 316 and a sliding bearing 310, as shown in FIG. Figure 5 、 Figure 12 and Figure 16 As shown, the end of the housing 304 is connected to the pump housing 302, forming a pump housing chamber. The impeller 306 is housed in the pump housing chamber. The base and controller 308 are connected to the bottom of the housing 304. The isolation sleeve 316 cooperates with the housing 304 and the base through sealing rings, dividing the space within the housing 304 into a water-flowing chamber 312 and a non-water-flowing chamber 314. The sliding bearing 310 is mounted on the rotating shaft 1 of the rotor assembly 100 and is arranged opposite the wear-resistant plate 2 of the rotor assembly 100.

[0164] The sliding bearing 310 is installed in the bearing hole of the housing 304. The stator assembly 202 of the motor 200 is installed in the non-water-flow chamber 314. The rotor assembly 100 of the motor 200 is installed in the water-flow chamber 312. The rotor assembly 100 contacts the sliding bearing 310.

[0165] These structures ensure the normal operation of the water pump 300, and there will be no rigid impact between the wear-resistant plate 2 and the sliding bearing 310 during the operation of the water pump 300. The wear of the wear-resistant plate 2 and the sliding bearing 310 is greatly improved, and the operating noise of the water pump 300 is correspondingly reduced.

[0166] It is worth noting that the housing 304 can be an integrated structure or a split structure. For example, the housing 304 includes an end cover and a cylindrical portion, the end cover is connected to the pump housing 302 to form a pump housing chamber, and the end cover and the cylindrical portion are connected together.

[0167] The vehicle 400 provided by the embodiment of the fourth aspect of the present invention is as follows: Figure 19 As shown, it includes: a vehicle body 402; and a water pump 300 as any one of the embodiments of the third aspect, installed in the vehicle body 402.

[0168] The vehicle 400 provided by the embodiment of the fourth aspect of the present invention includes the water pump 300 of the embodiment of the third aspect, and thus has all the beneficial effects of any of the above embodiments, which will not be repeated here.

[0169] Specifically, the vehicle body 402 includes structures such as a chassis, a frame, doors, and wheels.

[0170] Some specific examples of the water pump 300 are described below with reference to the accompanying drawings and compared with the prior art.

[0171] A water pump 300 includes: a base and controller 308, a casing 304, an isolation sleeve 316, a stator assembly 202, a rotor core 31 and magnets, a plastic-coated body 33, an elastic support member 4, a wear-resistant plate 2, a rotating shaft 1, a rotor assembly 100, a sliding bearing 310, an impeller 306, and a pump casing 302.

[0172] Specifically, the water pump 300 includes a pump casing 302; the end of the casing 304 is connected to the pump casing 302 by screws to form a pump casing chamber; the impeller 306 is accommodated in the end of the casing 304 and the pump casing 302 to form a pump casing chamber; the base and the controller 308 are connected to the bottom of the casing 304 by screws; the isolation sleeve 316 cooperates with the casing 304 and the base respectively through a sealing ring to separate the space inside the casing 304 into a water flow chamber 312 and a non-water flow chamber 314; the sliding bearing 310 is respectively installed in the bearing holes of the casing 304 and the base; the stator assembly 202 is installed in the non-water flow chamber 314 of the casing 304; the rotor assembly 100 is installed in the water flow chamber 312 of the casing 304; the wear-resistant plate 2 is installed at the end of the rotor assembly 100, and contacts and rubs with the end face of the sliding bearing 310 during operation; the elastic support member 4 is installed at the bottom of the wear-resistant plate 2 and has an elastic supporting effect on the wear-resistant plate 2. During the operation of the water pump 300, rigid contact between the wear-resistant sheet 2 and the end face of the sliding bearing 310 can be avoided, which can effectively reduce wear of the wear-resistant sheet 2 and the sliding bearing 310, reduce system noise, and improve work efficiency.

[0173] In the prior art, the wear-resistant plate 2 in the rotor assembly 100 of the motor 200 that contacts and rubs against the sliding bearing 310 is generally fixedly connected to the end face of the rotor 3. This design will cause increased wear of the wear-resistant plate 2 and the sliding bearing 310, increased noise, reduced efficiency, and reduced stability.

[0174] Specific example 1 (such as Figures 1 to 5 shown)

[0175] The electronic water pump 300 of this specific example includes a new type of rotor assembly 100, such as Figure 1 As shown, the rotor assembly 100 includes: a rotor core 31 and magnets, a plastic overmolding body 33, an elastic support member 4, a wear-resistant plate 2, and a rotating shaft 1. The end of the plastic overmolding body 33 includes a flat stopper (i.e., a second stopper 342) and a stopper with a buckle 3411 (i.e., a first stopper 341), and is provided with a mounting position (i.e., a mounting slot 331).

[0176] The rotor assembly 100 has a compressible and adjustable elastic support member 4 installed between the wear-resistant sheet 2 and the overmolded body 33. The elastic support member 4 can be a rubber pad, a rubber ring, a rubber block, or a spring, and can be annular, rectangular, polygonal, or irregularly shaped. The material and shape of the elastic support member 4 are not limited to those mentioned above. Due to the compressible and adjustable function of the elastic support member 4, there is no rigid impact between the wear-resistant sheet 2 and the sliding bearing 310 during operation of the water pump 300. The wear of the wear-resistant sheet 2 and the sliding bearing 310 is significantly improved, and the noise of the electronic water pump 300 is correspondingly reduced.

[0177] Among them, the end of the plastic body 33 includes a pair of flat blocks and a pair of blocks with buckles 3411. Due to the blocking effect of the buckles 3411 in the blocks with buckles 3411, the wear-resistant plate 2 and the elastic support member 4 will not fall out during the operation of the electronic water pump 300, and the product stability is improved.

[0178] Furthermore, during the injection molding process of the overmolded body 33, the relative positions of the rotor core 31 and the magnets and the flat block and the block with the buckle 3411 are fixed, and the two maintain a certain angle θ (0°-90°). During the magnetization process, the magnetization tooling is designed as a contoured tooling, thereby ensuring the relative position of the magnets and the magnetization coil, reducing the difficulty of the magnetization process, and improving the stability of the magnetization process.

[0179] Specific example 2 (such as Figures 6 to 12 shown)

[0180] The electronic water pump 300 of this specific example includes a novel rotor assembly 100, which includes: a rotor core 31 and magnets, a plastic-coated body 33, an elastic support member 4, a wear-resistant sheet 2, and a rotating shaft 1. A compressible and adjustable elastic support member 4 is installed between the wear-resistant sheet 2 and the plastic-coated body 33. The elastic support member 4 can be a rubber pad, a rubber ring, a rubber block, or a spring, and can be annular, rectangular, polygonal, or irregularly shaped. The material and shape of the elastic support member 4 are not limited to those mentioned above. Due to the compressible and adjustable function of the elastic support member 4, there will be no rigid impact between the wear-resistant sheet 2 and the sliding bearing 310 during operation of the water pump 300. The wear of the wear-resistant sheet 2 and the sliding bearing 310 will be greatly improved, and the noise of the water pump 300 will be reduced accordingly.

[0181] The wear-resistant sheet 2 includes a pair of retaining grooves (i.e., step grooves 22) and a pair of notches (i.e., avoidance notches 21). The ends of the overmolded body 33 include a pair of flat stop surfaces (i.e., stop protrusions 3432). During installation, the notches of the wear-resistant sheet 2 are aligned with the flat stop surfaces of the overmolded body 33 and pressed into place. Once the wear-resistant sheet 2 is fully inserted, it is rotated until the flat stop surfaces engage the retaining grooves. This prevents the wear-resistant sheet 2 from popping out during operation, improving product stability.

[0182] Furthermore, during the injection molding process of the overmolded body 33, the relative positions of the rotor core 31 and the magnet and the flat block surface are fixed, and the two maintain a certain angle θ (0°-90°). During the magnetizing process, the magnetizing tooling is designed as a contoured tooling, thereby ensuring the relative position of the magnet and the magnetizing coil, reducing the difficulty of the magnetizing process, and improving the stability of the magnetizing process.

[0183] Specific Example 3( Figures 13 to 16 shown)

[0184] The electronic water pump 300 of this specific example includes a novel rotor assembly 100, which includes: a rotor core 31 and magnets, a plastic-coated body 33, an elastic support member 4, a wear-resistant sheet 2, and a rotating shaft 1. A compressible and adjustable elastic support member 4 is installed between the wear-resistant sheet 2 and the plastic-coated body 33. The elastic support member 4 can be a rubber pad, a rubber ring, a rubber block, or a spring, and can be annular, rectangular, polygonal, or irregularly shaped. The material and shape of the elastic support member 4 are not limited to those mentioned above. Due to the compressible and adjustable function of the elastic support member 4, there will be no rigid impact between the wear-resistant sheet 2 and the sliding bearing 310 during operation of the water pump 300. The wear of the wear-resistant sheet 2 and the sliding bearing 310 will be greatly improved, and the noise of the water pump 300 will be reduced accordingly.

[0185] Among them, the wear-resistant plate 2 includes a pair of thrust protrusions (i.e., the stop protrusions 25), and the plastic body 33 includes a pair of side blocking surfaces (i.e., the anti-rotation part 3433) and a pair of flat blocking surfaces (i.e., the stop protrusions 3432). During the installation process, the wear-resistant plate 2 is pressed into the gap between the flat blocking surfaces and rotated in the correct direction until the thrust protrusions are completely stuck under the flat blocking surfaces. During operation, ensure that the rotation direction of the rotor 3 is opposite to the rotation direction during installation. The wear-resistant plate 2 will not fall out during operation, and the product stability is guaranteed.

[0186] Furthermore, during the injection molding process of the overmolded body 33, the relative positions of the rotor core 31 and the magnet and the flat block surface are fixed, and the two maintain a certain angle θ (0°-90°). During the magnetizing process, the magnetizing tooling is designed as a contoured tooling, thereby ensuring the relative position of the magnet and the magnetizing coil, reducing the difficulty of the magnetizing process, and improving the stability of the magnetizing process.

[0187] Due to the compressible adjustment function of the elastic support member 4, there will be no rigid impact between the wear-resistant plate 2 and the sliding bearing 310 during the operation of the water pump 300. The wear of the wear-resistant plate 2 and the sliding bearing 310 will be greatly improved, and the noise of the electronic water pump 300 will be reduced accordingly.

[0188] In the present invention, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in the present invention based on specific circumstances.

[0189] In the description of the present invention, it should be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front" and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0190] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0191] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A rotor assembly, characterized in that: include: Wear-resistant sheet; A rotor, wherein the end surface of the rotor facing the wear-resistant plate is provided with a limiting structure, the limiting structure comprising at least one stop protrusion, the stop protrusion being used to abut against an end of the wear-resistant plate away from the rotor to limit the axial position of the wear-resistant plate; an elastic support member, sandwiched between the wear-resistant sheet and the end surface of the rotor, for elastically supporting the wear-resistant sheet; The limiting structure includes: an annular limiting portion, one end of which is connected to the end surface of the rotor, the other end of which is provided with at least one stop protrusion, and the annular limiting portion is sleeved on the outside of the wear-resistant plate; The limiting structure is provided with a plurality of dynamic balancing mounting holes, and the dynamic balancing mounting holes are filled with material; The annular limiting portion is provided with an anti-rotation portion, and the wear-resistant plate includes a main body and a stop-stop protrusion connected to the main body. The anti-rotation portion and the stop-stop protrusion are engaged with each other along the circumference of the rotor to limit the wear-resistant plate from rotating relative to the rotor. The wear-resistant sheet and the rotor are sleeved on the rotating shaft, and the wear-resistant sheet and the rotating shaft are loosely matched; The radial gap between the rotating shaft and the wear-resistant plate is smaller than the radial gap between the wear-resistant plate and the limiting structure; A through hole is provided on the side wall of the annular limiting portion corresponding to the stopping protrusion.

2. The rotor assembly according to claim 1, wherein: The wear-resistant plate is provided with an avoidance notch for avoiding the stop protrusion, and the wear-resistant plate is suitable for rotating relative to the annular limiting portion so that the avoidance notch and the stop protrusion are staggered.

3. The rotor assembly according to claim 2, wherein: The wear-resistant plate is provided with a step groove, and the stop protrusion is at least partially embedded in the step groove.

4. The rotor assembly according to claim 3, wherein: The working load on the wear-resistant plate is Fa, the preload on the wear-resistant plate from the elastic support member is Fb, the elastic coefficient of the elastic support member is k, and the depth of the step groove is h; wherein, Fa, Fb, and k satisfy: (Fa-Fb) / (k×h)>σ, and σ>1.

5. The rotor assembly according to claim 1, wherein: The anti-rotation portion is connected to one end of the stop protrusion and is surrounded to form an accommodating space. The stop protrusion is suitable for rotating into or out of the accommodating space. The stop protrusion is in a stop-butt fit with the stop protrusion.

6. The rotor assembly according to claim 5, wherein: The direction in which the stop protrusion rotates into the accommodating space is opposite to the rotation direction of the rotor.

7. The rotor assembly according to any one of claims 1 to 6, characterized in that: The rotating shaft is connected to the rotor and rotates synchronously.

8. The rotor assembly according to any one of claims 1 to 6, characterized in that: An installation groove is provided on the end surface of the rotor facing the wear-resistant plate, and a portion of the elastic support member is limited in the installation groove.

9. The rotor assembly according to any one of claims 1 to 6, characterized in that: The elastic support member includes an elastic body; and / or The projection of the elastic support member on the end surface of the rotor is in a circular or polygonal shape.

10. The rotor assembly according to any one of claims 1 to 6, characterized in that: The elastic support member includes a spring and / or an elastic sheet.

11. The rotor assembly according to any one of claims 1 to 6, characterized in that: The rotor comprises: A rotor core, wherein the rotor core is provided with an axial hole for accommodating a rotating shaft and an accommodating groove for installing a permanent magnet; a permanent magnet, disposed in the receiving groove; The shell at least covers the end surface of the rotor core to encapsulate the permanent magnet in the rotor core, and one end surface of the shell forms the end surface of the rotor facing the wear-resistant plate.

12. The rotor assembly according to claim 11, wherein: The shell is a plastic-encapsulated body, the plastic-encapsulated body covers the rotor core, and the limiting structure and the plastic-encapsulated body are an integrated structure.

13. The rotor assembly according to claim 11, wherein: The limiting structure is provided with a positioning portion for directly or indirectly positioning the position of the permanent magnet.

14. A motor, characterized in that: include: The rotor assembly according to any one of claims 1 to 13; The stator assembly is sleeved on the rotor assembly and matched with the rotor assembly.

15. A water pump, characterized in that: include: The motor according to claim 14; and A pump body is connected to the motor.

16. The water pump according to claim 15, characterized in that The pump body comprises: pump housing; a casing, the end of which is connected to the pump casing to form a pump casing chamber; an impeller housed in the pump casing; A base and a controller connected to the bottom of the housing; An isolation sleeve, which cooperates with the housing and the base respectively through a sealing ring to separate the space inside the housing into a water-flowing chamber and a non-water-flowing chamber; A sliding bearing is sleeved on the rotating shaft of the rotor assembly and is arranged opposite to the wear-resistant sheet of the rotor assembly; Wherein, the sliding bearing is installed in the bearing hole of the casing; the stator assembly of the motor is installed in the non-water-flowing chamber; the rotor assembly of the motor is installed in the water-flowing chamber; and the rotor assembly is in contact with the sliding bearing.

17. A vehicle, characterized in that: include: body; and The water pump according to claim 15 or 16, mounted in the vehicle body.

Images