Wash pump motor
The washing pump motor addresses stability and cost issues by integrating bidirectional fastening mechanisms and anti-creep structures, enhancing motor stability and efficiency while reducing manufacturing costs.
Patent Information
- Authority / Receiving Office
- DE · DE
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2025-12-16
- Publication Date
- 2026-03-26
Smart Images
Figure 00000000_0000_ABST
Abstract
Description
TECHNICAL AREA
[0001] The present invention relates to the technical field of electric motors, in particular to a washing pump motor. STATE OF THE ART
[0002] In a high-pressure washing pump, the motor's output shaft is often used to set the impeller in motion, causing the impeller to rotate in the fluid storage chamber of the pump body and expelling the fluid from the nozzle in the fluid storage chamber.
[0003] The motor, as the drive component in a high-pressure washer pump, is a crucial factor influencing the pump's fluid spray performance and overall cost. Existing motor designs typically include an electronic control unit at the top of the motor and an output unit at the bottom. The electronic control unit's circuit board is usually secured to the housing with fasteners. During long-term operation, these fasteners often loosen, causing the circuit board to wobble within the housing and compromising the stability of the upper motor section. At the output unit, the lack of axial support for the rotor during operation often leads to axial jumps in the impeller, further impairing the stability of the lower motor section.If stability decreases at either the upper or lower end of the engine, this causes engine vibrations, which in turn affects the liquid spray performance.
[0004] Furthermore, existing motor rotors often incorporate heavy, circular, high-strength, strong-magnetic shells around the rotor shaft. This configuration results in a significant increase in the rotor's weight, leading to higher energy losses during rotation and consequently lower efficiency. Moreover, the ring-shaped, strong-magnetic shells themselves are expensive. During manufacturing, there is a risk that the plates will be crushed if the strong-magnetic shell is fitted too tightly between the shell and the rotor shaft, while a fit that is too loose can cause slippage between the two components. As a result, manufacturing is fraught with difficulties and a high error rate, ultimately driving up the overall cost of the motor.Maintaining engine efficiency and stability while simultaneously reducing production costs remains a challenge that engineers are intensively addressing. CONTENT OF THE PRESENT INVENTION
[0005] The problem to be solved by the present invention is to provide a motor with lower costs and better overall stability while maintaining a higher efficiency.
[0006] The present invention solves the above problem by the following technical solution: a washing pump motor comprising a shielding housing, an electronic control arrangement provided at the upper part of the interior of the shielding housing, and an output arrangement provided at the lower part of the interior of the shielding housing; wherein the shielding housing comprises an electronic control housing arranged at the upper area and an output housing arranged at the lower area, wherein several bidirectional fastening mechanisms are arranged on the inner wall of the electronic control housing, which are integrally formed with the electronic control housing, wherein the electronic control arrangement is fixed in the electronic control housing by the bidirectional fastening mechanisms; wherein the output arrangement comprises a stator and a rotor arranged in the output housing; wherein the rotor comprises a rotor shaft, a magnetic conductor arranged around the rotor shaft, several strongly magnetic shells spaced apart along the circumference of the magnetic conductor, a two-position mounting section arranged at both ends of the magnetic conductor, and an anti-creep mechanism arranged axially along the rotor shaft; wherein the magnetic conductor is formed from several stacked silicon steel sheets to reinforce the magnetic field generated by the multiple strong magnetic magnet shells; wherein the two-position fastening section comprises an axial enclosure and a radial enclosure; wherein the strong magnetic magnet shell is attached to the magnetic conductor via the axial enclosure, while the multiple silicon steel sheets forming the magnetic conductor are reinforced by the radial enclosure. wherein the anti-creep mechanism comprises a rotor shaft anti-creep structure and an anti-creep structure of the magnetic conductor, wherein the rotor shaft anti-creep structure is arranged at at least one end of the output housing to prevent axial creep of the rotor shaft, and wherein the anti-creep structure of the magnetic conductor is attached to both ends of the magnetic conductor to prevent axial creep of the magnetic conductor within the output housing.
[0007] In contrast to the prior art, the shielding housing of the present invention comprises an electronics control housing and an output housing, wherein the inner wall of the electronics control housing is provided with a bidirectional fastening mechanism formed integrally with it. The bidirectional fastening mechanism prevents loosening, as with conventional fasteners, when the electronic control assembly is mounted, thus increasing the stability of the upper part of the motor. The rotor of the output assembly comprises a rotor shaft, a magnetic conductor, a strong magnetic shell, a two-position mounting section, and an anti-creep mechanism. The rotor shaft is confined by the rotor shaft anti-creep structure, and the magnetic conductor is confined by the magnetic conductor's anti-creep structure, thus reducing the axial creep range of the rotor and increasing the stability of the lower part of the motor.With improved stability in both the upper and lower sections, the overall stability of the motor is enhanced, and the fluid spraying effect is more effective. The multiple high-strength magnetic shells of the output assembly are spaced along the circumference of the magnetic conductor and secured in two positions by the radial casing of the mounting section. Compared to ring-shaped magnetic shells that are fitted over the rotor shaft, breakage or slippage occurs less frequently during production, reducing the scrap rate and lowering manufacturing costs. Furthermore, compared to ring-shaped magnetic shells, the high-strength magnetic shells reduce the need for expensive high-strength magnets, lowering the overall cost of the motor while simultaneously reducing the rotor's weight. This minimizes energy loss due to excessive rotor weight during rotation.The magnetic conductor consists of several stacked silicon steel sheets to compensate for the magnetic field strength lost due to the reduced use of strong magnets. This lowers manufacturing costs while maintaining high output efficiency.
[0008] In the washing pump motor according to the present invention, the electronic control housing comprises an end cover and a top cover arranged on the end cover; wherein the end cover comprises a first recessed shell which is formed facing the rotor; wherein the output housing comprises a bottom cover and a second recessed shell which is formed away from the rotor; wherein the stator, the first recessed shell and the second recessed shell enclose a rotor receiving space for receiving the rotor.
[0009] In the washing pump motor according to the present invention, the rotor shaft anti-creep structure comprises a ball bearing and an oil bearing, each arranged at each end of the rotor shaft; wherein the outer ring of the ball bearings is provided in a close fit with the second recessed shell and the inner ring is provided in a close fit with the outer wall of the rotor shaft to prevent axial creep of the rotor shaft; wherein the oil bearing is configured to be attached to the first recessed shell; wherein the end cover comprises at least one positioning stage for positioning the end cover and the lower cover.
[0010] In the washing pump motor according to the present invention, the rotor receiving space comprises a first axial space, a second axial space, a third axial space and a fourth axial space, arranged from bottom to top; wherein the anti-creep structure of the magnetic conductor comprises a first gap-filling section and a second gap-filling section; wherein the ball bearing is arranged in the first axial space; the first gap-filling section is arranged in the second axial space; the magnetic conductor is arranged in the third axial space; the second gap-filling section is arranged in the fourth axial space.
[0011] In the washing pump motor according to the present invention, the first gap-filling section is an annular, rigid snap ring; wherein the upper surface of the first gap-filling section rests against the lower surface of the magnetic conductor; wherein the lower surface of the first gap-filling section rests against the upper surface of the inner ring of the ball bearing; wherein the second gap-filling section is a disc-shaped flexible washer; wherein the lower surface of the second gap-filling section is in contact with the upper surface of the magnetic conductor; and wherein the upper surface of the second gap-filling section is in contact with the upper surface of the first recessed shell.
[0012] In the washing pump motor according to the present invention, the strong magnetic magnet shell is provided with a fan-shaped cross-section; wherein the magnetic conductor comprises a central shaft, a through-hole extending through the central shaft, several partition segments arranged circumferentially along the outer wall of the central shaft, and a magnet shell mounting area enclosed by the central shaft and two adjacent partition segments, wherein the strong magnetic magnet shell is provided in the magnet shell mounting area; wherein the lower region of the rotor shaft has at least one step.
[0013] In the washing pump motor according to the present invention, the strong magnetic magnet shell comprises an inner arc surface, an outer arc surface and two side surfaces; wherein the radial covering exerts a force directed towards the central shaft on the outer arc surface; wherein the inner arc surface rests against the outer wall of the central shaft and the two side surfaces each rest against the side surfaces of the two adjacent division segments.
[0014] In the washing pump motor according to the present invention, the bidirectional fastening mechanism comprises several bottom-end lifting parts and several top-end locking parts; wherein several of the bottom-end lifting parts are arranged on the upper surface of the end cover and several of the top-end locking parts are attached to the inner wall of the top cover; wherein the end cover comprises a first locking groove arranged circumferentially along the edge, wherein the top cover comprises a first locking bar arranged at the bottom of the side wall; wherein, when the second locking grooves and the second locking bar are riveted and fixed, the bottom end lifting parts and the top end locking parts respectively fix the electronic control arrangement from below and from above.
[0015] In the washing pump motor according to the present invention, the end cover further comprises several continuously formed second locking grooves, wherein the output housing comprises a second locking bar which is arranged in the upper region of the side wall; wherein, when the second locking grooves and the second locking bar are riveted and fixed, the axial clearance in the rotor receiving space is reduced.
[0016] In the washing pump motor according to the present invention, the electronic control arrangement comprises a connector; wherein the connector protrudes from the top of the upper cover; wherein the rotor shaft protrudes from the underside of the second recessed shell; wherein the connector comprises a plurality of terminals, at least one terminal being connected to the upper cover. BRIEF DESCRIPTION OF THE DRAWING Fig. Figure 1 shows a three-dimensional schematic representation of the present invention; Fig. Figure 2 shows a schematic exploded view of the present invention; Fig. Figure 3 shows a three-dimensional schematic representation of the end cap; Fig. 4 shows a schematic sectional view of the present invention from one perspective; Fig. Figure 5 shows an enlarged schematic representation of the internal structure of the rotor mounting chamber; Fig. Figure 6 shows a schematic sectional view of the present invention from a different perspective; Fig. Figure 7 shows a three-dimensional schematic representation of the rotor; Fig. Figure 8 shows an exploded view of the rotor; Fig. Figure 9 shows a schematic sectional view of the internal structure of the output housing; Fig. Figure 10 is an enlarged schematic representation of the cooperation between the strong magnetic shell and the magnetic conductor; and Fig. Figure 11 shows a three-dimensional schematic representation of the sheets of the magnetic conductor. DETAILED DESCRIPTION
[0017] Before an embodiment of the present invention is described in detail, it should be understood that the invention is not limited in its application to the details of the design and arrangement of the components as set forth in the following description or illustrated in the accompanying drawings. The invention is also conceivable in other embodiments and can be implemented in various ways. Furthermore, the words and terms used herein are descriptive and not to be understood as limiting. The use of "comprise" or "feature" and their variants in this document is intended to cover the entries listed below and their equivalents, as well as additional entries.Unless otherwise specified or limited, the terms "assembly," "connection," "bracket," and "coupling," and their variants, are used broadly to encompass both direct and indirect installations, connections, brackets, and couplings. The terms "installation," "connection," "bracket," and "coupling," and their variants, are also used broadly to encompass both direct and indirect installations, connections, brackets, and couplings. Furthermore, the terms "connection" and "coupling" are not limited to physical or mechanical connections or couplings.
[0018] Firstly, in the disclosure of the present invention, the directional or positional relationship indicated by terms such as "longitudinal," "transverse," "above," "below," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," etc., refers to the directional or positional relationship as depicted in the accompanying drawings. This serves only to simplify the description of the invention and does not imply that the devices or elements so designated must have a particular orientation or be designed and operated in a particular direction. Therefore, the aforementioned terms are not to be understood as limiting the invention. Secondly, the term "one" is to be understood as "at least one" or "one or more," i.e., in one embodiment the number of an element may be one, while in other embodiments it may be several.The term "a" should not be understood as a restriction of the quantity.
[0019] Those skilled in the art should understand that the embodiments of the invention shown in the above description and in the figures serve only as examples and do not limit the invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been illustrated and explained in the exemplary embodiments. Without deviating from these principles, the embodiments of the invention may include any variations or modifications.
[0020] Embodiments of the present invention are described in more detail below in conjunction with the accompanying figures.
[0021] With reference to Fig. Figure 1-11 shows a washing pump motor comprising a shielding housing 1, an electronic control arrangement 2 provided at the upper part of the interior of the shielding housing 1, and an output arrangement 3 provided at the lower part of the interior of the shielding housing 1; wherein the shielding housing 1 comprises an electronic control housing 11 arranged at the upper area and an output housing 12 arranged at the lower area, wherein several bidirectional fastening mechanisms 114 are arranged on the inner wall of the electronic control housing 11, which are integrally formed with the electronic control housing 11, wherein the electronic control arrangement 2 is fixed in the electronic control housing 11 by the bidirectional fastening mechanisms 114; wherein the output arrangement 3 comprises a stator 31 and a rotor 32 arranged in the output housing 12; wherein the rotor 32 comprises a rotor shaft 321, a magnetic conductor 322 arranged around the rotor shaft 321, several strong magnetic shells 323 spaced apart along the circumference of the magnetic conductor 322, a two-position mounting section 324 arranged at both ends of the magnetic conductor 322, and an anti-creep mechanism 325 arranged axially along the rotor shaft 321; wherein the magnetic conductor 322 is formed from several superimposed silicon steel sheets to reinforce the magnetic field generated by the several strong magnetic magnetic shells 323; wherein the fastening section 324 with two positions comprises an axial enclosure 3241 and a radial enclosure 3242; wherein the strong magnetic magnetic shell 323 is attached to the magnetic conductor 322 via the axial enclosure 3241, while the several silicon steel sheets forming the magnetic conductor 322 are reinforced by the radial enclosure 3242; wherein the anti-creep mechanism 325 comprises a rotor shaft anti-creep structure 3251 and an anti-creep structure of the magnetic conductor 3252, wherein the rotor shaft anti-creep structure 3251 is arranged at at least one end of the output housing 12 to prevent axial creep of the rotor shaft 321, wherein the anti-creep structure of the magnetic conductor 3252 is attached to both ends of the magnetic conductor 322 to prevent axial creep of the magnetic conductor 322 within the output housing 12.
[0022] In contrast to the prior art, the shielding housing 1 of the present invention comprises an electronic control housing 11 and an output housing 12, wherein the inner wall of the electronic control housing 11 is provided with a bidirectional fastening mechanism 114 formed integrally with it. The bidirectional fastening mechanism 114 prevents loosening, as is the case with conventional fasteners, when the electronic control arrangement 2 is attached, thus making the upper part of the motor more stable. The rotor 32 of the output arrangement 3 comprises a rotor shaft 321, a magnetic conductor 322, a strong magnetic shell 323, a two-position mounting section 324, and an anti-creep mechanism 325.The rotor shaft 321 is limited by the rotor shaft anti-creep structure 3251, and the magnetic conductor 322 is limited by the magnetic conductor's anti-creep structure 3252, thus reducing the axial creep range of the rotor 32 and making the lower part of the motor more stable. With the improved stability of both the upper and lower parts, the overall stability of the motor is better, and the liquid spraying effect is more effective. The multiple strong magnetic shells 323 of the output assembly 3 are spaced apart along the circumference of the magnetic conductor 322 and are fixed in two positions by the radial casing 3242 of the mounting section 324. Compared to ring-shaped magnetic shells that are slipped over the rotor shaft, breakage or slippage occurs less frequently during production, reducing the scrap rate and lowering manufacturing costs.Furthermore, the strong magnetic shells 323 reduce the use of expensive strong magnets compared to ring-shaped magnetic shells, thus lowering the overall cost of the motor and simultaneously reducing the rotor's weight. This minimizes energy loss due to excessive rotor weight during rotation. The magnetic conductor 322 consists of several stacked silicon steel sheets to compensate for the magnetic field strength lost through the reduced use of strong magnets. This reduces manufacturing costs while maintaining high output efficiency.
[0023] With further reference to Fig. 2, Fig. 3, Fig. 4 and Fig. 5 The electronic control housing 11 comprises an end cover 111 and a top cover 112 arranged on the end cover 111; wherein the end cover 111 comprises a first recessed shell 1111 which is formed facing the rotor 32; wherein the output housing 12 comprises a lower cover 121 and a second recessed shell 1211 which is formed away from the rotor 32; wherein the stator 31, the first recessed shell 1111 and the second recessed shell 1211 enclose a rotor receiving space 113 for receiving the rotor 32.
[0024] Specifically, the first recessed shell 1111 is formed by the end cover 111, and the second recessed shell 1211 is formed by the bottom cover 121, neither of which are independently adjustable. This arrangement reduces the cost of manufacturing recessed shells separately and also eliminates the assembly process of the shells, thus lowering the overall manufacturing costs of the motor. Furthermore, the one-piece molded recessed shell prevents loosening caused by motor vibrations. The first recessed shell 1111 provides a more stable structure in the upper part of the motor, while the second recessed shell 1211 stabilizes the lower part. In addition, the stator 31, the first recessed shell 1111, and the second recessed shell 1211 together form the rotor mounting space 113 for receiving the rotor 32, thus laying the foundation for the subsequent implementation of the anti-creep function of the rotor 32.
[0025] With reference to Fig. 4, Fig. 5 and Fig. 6 The rotor shaft anti-creep structure 3251 comprises a ball bearing 32511 and an oil bearing 32512, each arranged at each end of the rotor shaft 321; wherein the outer ring of the ball bearings 32511 is provided in a close fit with the second recessed shell 1211 and the inner ring is provided in a close fit with the outer wall of the rotor shaft 321 to prevent axial creep of the rotor shaft 321; wherein the oil bearing 32512 is configured to be attached to the first recessed shell 1111; wherein the end cap 111 comprises at least one positioning stage for positioning the end cap 111 and the lower cap 121 to achieve concentricity between the two.
[0026] Specifically, in this embodiment, the outer ring of the ball bearing 32511 is tightly fitted to the second recessed shell 1211, and the inner ring of the ball bearing 32511 is tightly fitted to the outer wall of the rotor shaft 321. When the rotor shaft 321 rotates, the inner and outer rings of the ball bearing 32511 can only move relative to each other, but not up and down, thus limiting the vertical movement of the rotor shaft 321. The oil bearing 32512 is in a tight fit with the inner wall of the first recessed shell 1111. When the rotor shaft 321 rotates, its upper section rotates within the oil bearing 32512. Since a ball bearing 32511 is already present at one end of the rotor shaft 321, which performs the anti-creep function, the other end is fitted with a more cost-effective oil bearing 32512, which represents an economical solution for the entire motor.
[0027] Understandably, when using high-performance motors with high speeds, the oil bearing 32512 at the other end of the rotor shaft 321 can be replaced by a ball bearing 32511.
[0028] With further reference to Fig. 4 and Fig. 5 The rotor receiving space 113 comprises a first axial space 1131, a second axial space 1132, a third axial space 1133 and a fourth axial space 1134, arranged from bottom to top; wherein the anti-creep structure of the magnetic conductor 3252 comprises a first gap-filling section 32521 and a second gap-filling section 32522; wherein the ball bearing 32511 is arranged in the first axial space 1131; the first gap-filling section 32521 is arranged in the second axial space 1132; the magnetic conductor 322 is arranged in the third axial space 1133; the second gap-filling section 32522 is arranged in the fourth axial space 1134.
[0029] Understandably, the high rotational speed of the rotor 32 results in certain axial movements of components such as the rotor shaft 321, the magnetic conductor 322, and the strong magnetic shell 323 mounted on it. Due to these movements, the rotor mounting space 113 is divided into the first axial space 1131, the second axial space 1132, the third axial space 1133, and the fourth axial space 1134. The ball bearing 32511 is located in the first axial space 1131, the magnetic conductor 322 in the third axial space 1133, while the second and fourth axial spaces 1132 and 1134 provide freedom of movement for the magnetic conductor 322 and the strong magnetic shell 323 mounted on it.When the first gap-filling section 32521 is placed in the second axial space 1132 and the second gap-filling section 32522 is placed in the fourth axial space 1134, these spaces are axially filled, thus preventing unwanted movements of the magnetic conductor 322 and the strong magnetic shell 323 mounted on it.
[0030] With reference to Fig. 4 and Fig. 5 the first gap-filling section 32521 is an annular, rigid snap ring; wherein the upper surface of the first gap-filling section 32521 rests against the lower surface of the magnetic conductor 322; wherein the lower surface of the first gap-filling section 32521 rests against the upper surface of the inner ring of the ball bearing 32511; wherein the second gap-filling section 32522 is a disc-shaped flexible washer; wherein the lower surface of the second gap-filling section 32522 is in contact with the upper surface of the magnetic conductor 322; and wherein the upper surface of the second gap-filling section 32522 is in contact with the upper surface of the first recessed shell 1111.
[0031] Understandably, due to the arrangement of the ball bearing 32511 at the lower end of the rotor shaft 321, whose inner ring rotates synchronously with the rotor shaft, it is preferable to design the first gap-filling section 32521 as an annular, rigid snap ring. This can support both the lower surface of the magnetic conductor 322 and the upper surface of the inner ring of the ball bearing 32511 to fill the second gap-filling section 32522, and rotate with both without impairing their power transmission. At the upper end of the rotor shaft 321, however, an oil bearing 32512 is mounted, positioned in the first recessed shell 1111. When the magnetic conductor 322 rotates, its upper surface could rub against the bottom wall of the first recessed shell 1111, which would reduce the motor efficiency.If the second gap-filling section 32522 is designed as a disc-shaped, soft washer, it can reduce friction with the magnetic conductor 322 or the bottom wall of the first recessed shell 1111 by adding lubricants or by using self-lubricating materials, so that it fills the fourth axial space 1134 without affecting the efficiency of the motor.
[0032] With further reference to Fig. 7, Fig. 8, Fig. 9, Fig. 10 and Fig. 11 The highly magnetic magnetic shell 323 is provided with a fan-shaped cross-section; wherein the magnetic conductor 322 comprises a central shaft 3221, a through-hole 3222 extending through the central shaft 3221, several division segments 3223 arranged circumferentially along the outer wall of the central shaft 3221, and a magnetic shell mounting area 3224 enclosed by the central shaft 3221 and two adjacent division segments 3223, wherein the highly magnetic magnetic shell 323 is provided in the magnetic shell mounting area 3224; wherein the lower region of the rotor shaft 321 has at least one step.
[0033] In this arrangement, the use of strong magnetic material in the motor is reduced compared to a ring-shaped, strong magnetic shell. The reduced proportion corresponds to the area filled by the division segment 3223. The loss of magnetic field strength resulting from the reduction of strong magnetic material can be compensated for by the magnetic conductor 322, which consists of several stacked silicon steel sheets. This reduces the use of the more expensive strong magnetic material without affecting the magnetic field strength, while simultaneously reducing the overall weight of the rotor 32, decreasing the energy required for the rotation of the rotor 32 due to its own weight, and thus increasing the overall efficiency of the motor.
[0034] With further reference to the Fig. 7 and Fig. 8. The lower section of the rotor shaft 321 is equipped with at least one step. This arrangement allows the rotor shaft 321 to be pressed into the through-hole 3222 by the combined action of its lower surface and the step. This reduces both the bending of the rotor shaft 321 and damage to the outer surface of the part entering the through-hole 3222. This ensures greater stability and concentricity when the magnetic conductor 322 is driven by the rotor shaft 321, resulting in more stable operation of the entire motor.
[0035] With further reference to Fig. 10 The strong magnetic shell 323 comprises an inner arc surface 3231, an outer arc surface 3232 and two side surfaces 3233; wherein the radial covering 3242 exerts a force directed towards the central shaft 3221 on the outer arc surface 3232; wherein the inner arc surface 3231 abuts the outer wall of the central shaft 3221 and the two side surfaces 3233 each abut the side surfaces of the two adjacent division segments 3223.
[0036] It is understandable that during production, the strong magnetic shell 323 is attached to the magnetic conductor 322 from its side surfaces, rather than forcibly pressing the magnetic conductor 322 into the interior of the annular strong magnetic shell. This arrangement reduces the likelihood of the strong magnetic shell 323 breaking during assembly with the magnetic conductor 322, resulting in lower production losses and reduced manufacturing costs. Furthermore, when the outer arc surface 3232 is tightly enclosed by the radial casing 3242, the force on the inner arc surface 3231 is distributed to the central shaft 3221, and the forces on the two side surfaces 3233 are each transferred to the side surfaces of the two adjacent division segments 3223.This ensures that the force is distributed evenly across the entire strong magnetic shell 323, making breakage less likely during both production and use, and further reducing manufacturing costs.
[0037] With further reference to Fig. 3 and Fig. 4 The bidirectional fastening mechanism 114 comprises several bottom-end lifting parts 1141 and several top-end snap-in parts 1142; wherein several of the bottom-end lifting parts 1141 are arranged on the upper surface of the end cover 111 and several of the top-end snap-in parts 1142 are attached to the inner wall of the top cover 112; wherein the end cover 111 comprises a first locking groove 1112 arranged circumferentially along the edge, wherein the top cover 112 comprises a first locking latch 1121 arranged at the bottom of the side wall; wherein, when the second locking grooves 1113 and the second locking latch 122 are riveted and fixed, the bottom end lifting parts 1141 and the top end locking parts 1142 fix the electronic control arrangement 2 from below and from above, respectively.
[0038] Specifically, several bottom-end lifting elements 1141 are formed in one piece on the upper surface of the end cover 111 by bending, casting, welding, etc., while the top-end locking elements 1142 are formed in one piece on the inner wall of the top cover 112 by riveting, etc. Both prevent loosening, as can occur with fasteners under engine vibrations. During assembly, the electronic control assembly 2 is placed on several bottom-end lifting elements 1141. When the first locking bar 1121 is riveted to the first locking groove 1112, the top-end locking elements 1142 simultaneously press down on the electronic control assembly 2 from above, so that it absorbs forces from both above and below, thus preventing the instability of the upper part of the engine caused by the electronic control assembly 2 coming loose.
[0039] With reference to Fig. 2 and Fig. 3 the end cover 111 further comprises several continuous second locking grooves 1113, wherein the output housing 12 comprises a second locking bar 122 which is arranged in the upper region of the side wall; wherein, when the second locking grooves 1113 and the second locking bar 122 are riveted and fixed, the axial clearance in the rotor receiving space 113 is reduced.
[0040] With further reference to Fig. 1 and Fig. 2 the electronic control arrangement 2 includes a connector 21; wherein the connector 21 protrudes from the top of the top cover 112; wherein the rotor shaft 321 protrudes from the bottom of the second recessed shell 1211.
[0041] In this arrangement, the motor has only two small outputs: the output of the connector 21 and the output of the rotor shaft 321, which results in good shielding and excellent interference immunity of the motor.
[0042] It is worth noting that in this embodiment, the connector 21 comprises one negative terminal and two positive terminals, with the negative terminal being connected to the top cover 112 to ensure housing grounding and further enhance the shielding effect. It is understandable that in other embodiments, multiple terminals may also include a dedicated grounding terminal. Connecting this grounding terminal to the top cover 112 can likewise ensure housing grounding.
[0043] The above statements refer only to the preferred embodiment of the present invention and should not be construed as limiting the claim. The present invention is not limited to the above-mentioned embodiments, the specific structure of which permits modifications. All modifications made within the scope of protection of the independent claims of this invention fall within the scope of protection of this invention.
Claims
[1] A washing pump motor, characterized by , that it comprises a shielding housing (1), an electronic control arrangement (2) provided at the upper part of the interior of the shielding housing (1), and an output arrangement (3) provided at the lower part of the interior of the shielding housing (1), wherein the shielding housing (1) comprises an electronic control housing (11) arranged at the upper region and an output housing (12) arranged at the lower region, wherein several bidirectional fastening mechanisms (114) are arranged on the inner wall of the electronic control housing (11) and are integrally formed with the electronic control housing (11), wherein the electronic control arrangement (2) is fixed in the electronic control housing (11) by the bidirectional fastening mechanisms (114); wherein the output arrangement (3) comprises a stator (31) and a rotor (32) arranged in the output housing (12); wherein the rotor (32) comprises a rotor shaft (321), a magnetic conductor (322) arranged around the rotor shaft (321), several strongly magnetic shells (323) spaced apart along the circumference of the magnetic conductor (322), a two-position mounting section (324) arranged at both ends of the magnetic conductor (322), and an anti-creep mechanism (325) arranged axially along the rotor shaft (321); wherein the magnetic conductor (322) is formed from several stacked silicon steel sheets to enhance the magnetic field generated by the several strong magnetic magnetic shells (323); wherein the fastening section (324) with two positions comprises an axial enclosure (3241) and a radial enclosure (3242); wherein the strong magnetic magnetic shell (323) is attached to the magnetic conductor (322) via the axial enclosure (3241), while the several silicon steel sheets forming the magnetic conductor (322) are reinforced by the radial enclosure (3242). wherein the anti-creep mechanism (325) comprises a rotor shaft anti-creep structure (3251) and an anti-creep structure of the magnetic conductor (3252), wherein the rotor shaft anti-creep structure (3251) is arranged at at least one end of the output housing (12) to prevent axial creep of the rotor shaft (321), and wherein the anti-creep structure of the magnetic conductor (3252) is attached to both ends of the magnetic conductor (322) to prevent axial creep of the magnetic conductor (322) within the output housing (12). [2] The washing pump motor according to claim 1, characterized by, that the electronic control housing (11) comprises an end cover (111) and a top cover (112) arranged on the end cover (111); wherein the end cover (111) comprises a first recessed shell (1111) which is formed facing the rotor (32); wherein the output housing (12) comprises a bottom cover (121) and a second recessed shell (1211) which is formed away from the rotor (32); wherein the stator (31), the first recessed shell (1111) and the second recessed shell (1211) enclose a rotor receiving space (113) for receiving the rotor (32). [3] The washing pump motor according to claim 2, characterized bythat the rotor shaft anti-creep structure (3251) comprises a ball bearing (32511) and an oil bearing (32512), each arranged at each end of the rotor shaft (321); wherein the outer ring of the ball bearings (32511) is provided in a close fit with the second recessed shell (1211) and the inner ring is provided in a close fit with the outer wall of the rotor shaft (321) to prevent axial creep of the rotor shaft (321); wherein the oil bearing (32512) is configured to be attached to the first recessed shell (1111); wherein the end cap (111) comprises at least one positioning stage for positioning the end cap (111) and the lower cap (121). [4] The washing pump motor according to claim 3, characterized by, that the rotor receiving space (113) comprises a first axial space (1131), a second axial space (1132), a third axial space (1133) and a fourth axial space (1134), arranged from bottom to top; wherein the anti-creep structure of the magnetic conductor (3252) comprises a first gap-filling section (32521) and a second gap-filling section (32522); wherein the ball bearing (32511) is arranged in the first axial space (1131); the first gap-filling section (32521) is arranged in the second axial space (1132); the magnetic conductor (322) is arranged in the third axial space (1133); the second gap-filling section (32522) is arranged in the fourth axial space (1134). [5] The washing pump motor according to claim 4, characterized by, that the first gap-filling section (32521) is an annular, rigid snap ring; the upper surface of the first gap-filling section (32521) rests against the lower surface of the magnetic conductor (322); the lower surface of the first gap-filling section (32521) rests against the upper surface of the inner ring of the ball bearing (32511); wherein the second gap-filling section (32522) is a disk-shaped flexible washer; wherein the lower surface of the second gap-filling section (32522) is in contact with the upper surface of the magnetic conductor (322); and wherein the upper surface of the second gap-filling section (32522) is in contact with the upper surface of the first recessed shell (1111). [6] The washing pump motor according to any one of claims 1 to 5, characterized by, that the strong magnetic shell (323) is provided with a fan-shaped cross-section; wherein the magnetic conductor (322) comprises a central shaft (3221), a through-hole (3222) extending through the central shaft (3221), several partition segments (3223) arranged circumferentially along the outer wall of the central shaft (3221), and a magnetic shell mounting area (3224) enclosed by the central shaft (3221) and two adjacent partition segments (3223), wherein the strong magnetic shell (323) is provided in the magnetic shell mounting area (3224); wherein the lower region of the rotor shaft (321) has at least one step. [7] The washing pump motor according to claim 6, characterized by, that the strong magnetic magnetic shell (323) comprises an inner arc surface (3231), an outer arc surface (3232) and two side surfaces (3233); wherein the radial covering (3242) exerts a force directed towards the central shaft (3221) on the outer arc surface (3232); wherein the inner arc surface (3231) abuts the outer wall of the central shaft (3221) and the two side surfaces (3233) each abut the side surfaces of the two adjacent division segments (3223). [8] The washing pump motor according to any one of claims 2 to 7, characterized by, that the bidirectional fastening mechanism (114) comprises several bottom-end lifting elements (1141) and several top-end snap-in elements (1142); wherein several of the bottom-end lifting elements (1141) are arranged on the upper surface of the end cover (111) and several of the top-end snap-in elements (1142) are attached to the inner wall of the top cover (112); wherein the end cover (111) comprises a first snap groove (1112) arranged circumferentially along the edge, and wherein the top cover (112) comprises a first snap latch (1121) arranged at the bottom of the side wall; wherein, when the second snap grooves (1113) and the second snap latch (122) are riveted and fixed, the bottom-end lifting elements (1141) and the top-end snap latches (1142) respectively fix the electronic control arrangement (2) from below and from above. [9] Washing pump motor according to any one of claims 2 to 8, characterized by, that the end cover (111) further comprises several continuous second locking grooves (1113), wherein the output housing (12) comprises a second locking bar (122) which is arranged in the upper region of the side wall; wherein, when the second locking grooves (1113) and the second locking bar (122) are riveted and fixed, the axial clearance in the rotor receiving space (113) is reduced. [10] The washing pump motor according to any one of claims 2 to 9, characterized by , that the electronic control arrangement (2) comprises a connector (21); wherein the connector (21) protrudes from the top of the upper cover (112); wherein the rotor shaft (321) protrudes from the underside of the second recessed shell (1211); wherein the connector (21) comprises a plurality of terminals, at least one terminal being connected to the upper cover (112).