Injection molding integrated automobile electronic water pump

Abstract

The utility model relates to the technical field of automobile electronic water pumps, in particular to an injection molding integrated automobile electronic water pump which comprises a cooling medium channel, a shell, a front cover, a stator winding, a rear cover, a control assembly, a sealing component, an impeller rotor assembly and a self-tapping screw. The cooling medium channel is arranged on one side of the front cover, the front cover is connected with the motor shell through a self-tapping screw, the stator winding is arranged in the motor shell, the rear cover is connected with the motor shell through a self-tapping screw, the control assembly is electrically connected with the stator winding, the sealing component is connected with the rear cover, and the impeller rotor assembly is installed in the motor shell. The rotor and the impeller of the electronic water pump can be designed into a whole, and a flange plate structure is omitted, so that the axial size is reduced, the whole structure is simple, the production cost is low, the energy loss is reduced, and the fatigue strength of the whole structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile electronic water pumps, in particular to an injection-molded automobile electronic water pump. Background Art

[0002] The power battery of an electric vehicle will generate heat during charging and discharging, especially during fast charging and high-power discharge. Its optimal operating temperature is 15-35°C. Too low or too high temperatures will lead to reduced charging and discharging performance and cycle life of the battery, and may also cause the power battery to spontaneously combust. Therefore, power batteries will be designed with a liquid circulation thermal management system to achieve heating and cooling of the power battery.

[0003] Traditional mechanical water pumps have many problems such as low engine effective power, high fuel consumption, high operating noise, short service life, and low intelligence. According to the existing patent CN202222154327.7, an impeller assembly for an automotive electronic water pump is disclosed, including an impeller body 1 and a rotor core 2; the impeller body 1 is coaxially fixedly connected with the rotor core 2. According to the contents recorded in its specification and the accompanying drawings, the impeller and rotor disclosed in the application are not integrally formed. The fixed connection strength of the non-integrated structure is not as good as that of the integrally formed structure. Especially during high-speed operation, the connection part will be damaged and broken after long-term use. Utility Model Content

[0004] The purpose of the utility model is to provide an injection-molded automotive electronic water pump, which can design the electronic water pump rotor and impeller as one body, the impeller rotor assembly is directly driven by the magnetic force of the motor stator winding, and then the integral structure is injection-molded, eliminating the flange structure, thereby reducing the axial size, making the overall structure simple, low in production cost, reducing energy loss, and increasing the fatigue strength of the overall structure.

[0005] To achieve the above-mentioned purpose, the utility model provides an injection-molded automotive electronic water pump, comprising a cooling medium channel, a housing, a front cover, a stator winding, a rear cover, a control component, a sealing member, an impeller rotor assembly and self-tapping screws, wherein the housing comprises a rubber bracket and a motor housing;

[0006] The cooling medium channel is arranged on one side of the front cover, the front cover is connected to the motor housing by the self-tapping screws, the stator winding is arranged in the motor housing, the rear cover is connected to the motor housing by the self-tapping screws, the control component is electrically connected to the stator winding and is installed on one side of the motor housing, the sealing member is connected to the rear cover, and the impeller rotor assembly is installed in the motor housing.

[0007] Wherein, the sealing component includes a rear cover sealing ring, a water-blocking sleeve, a front cover sealing ring, an outer sleeve and an axis core, the rear cover sealing ring is installed on one side of the rear cover; the water-blocking sleeve is arranged on the inner side of the stator winding, and the open end of the water-blocking sleeve is connected to the front cover to form a hydraulic cavity; the front cover sealing ring is arranged between the front cover and the water-blocking sleeve; the outer sleeve is arranged on one side of the water-blocking sleeve; and the axis core is installed on one side of the water-blocking sleeve.

[0008] The impeller-rotor assembly comprises an impeller and a rotor, wherein the impeller is composed of impeller blades and an impeller disk, and the rotor is arranged outside the impeller-rotor assembly.

[0009] Wherein, the cooling medium channel includes a water inlet and a water outlet, the water inlet is located on one side of the front cover; the water outlet is located on one side of the front cover.

[0010] Wherein, the waterproof sleeve has an annular cavity, and the annular cavity is arranged inside the waterproof sleeve.

[0011] Wherein, the rubber bracket has a fixed upper seat positioning hole, a fixed lower seat positioning hole and a limiting groove, the fixed upper seat positioning hole is located on one side of the rubber bracket; the fixed lower seat positioning hole is located on one side of the rubber bracket; the limiting groove is located on one side of the rubber bracket.

[0012] The utility model discloses an injection-molded automotive electronic water pump, in which the front cover provided with the water inlet and the water outlet is fixedly connected to the front end of the motor housing by the self-tapping screws, and the rear cover is also fixedly connected to the rear end of the motor housing by the self-tapping screws. The motor housing is a cylindrical structure with openings at both ends, and its bottom is connected to the control component. The stator winding is arranged on the inner side of the motor housing and is electrically connected to the control component. Under the control of the control component, a driving rotating magnetic field is generated, so that the impeller rotor assembly rotates under the action of the rotating magnetic field, so that the electronic water pump rotor and the impeller can be designed as one body, and the impeller rotor assembly is directly driven by the magnetic force of the motor stator winding. Then, the one-piece structure is formed by injection molding, thereby eliminating the structure of the flange, thereby reducing the axial size, making the overall structure simple, low in production cost, reducing energy loss, and increasing the fatigue strength of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0014] Figure 1 It is a schematic diagram of the structure of the electronic water pump of the utility model.

[0015] Figure 2It is a left view of the electronic water pump of the utility model.

[0016] Figure 3 It is a right side view of the electronic water pump of the present utility model.

[0017] Figure 4 It is a top view of the electronic water pump of the present utility model.

[0018] Figure 5 It is a schematic diagram of the impeller rotor assembly of the utility model.

[0019] Figure 6 It is a schematic diagram of the cross-sectional structure of the impeller rotor assembly of the utility model.

[0020] Figure 7 It is a front view of the impeller rotor assembly of the utility model.

[0021] Figure 8 It is a front view of the water-isolating sleeve of the utility model.

[0022] Fig. 9 It is the AA cross-sectional view of the water-isolating sleeve of the utility model.

[0023] Fig.10 It is a structural schematic diagram of a rubber bracket fixing seat of the utility model.

[0024] Fig.11 It is a schematic diagram of the rubber bracket fixing upper seat structure of the utility model.

[0025] Fig.12 It is a top view of the rubber bracket fixing upper seat of the utility model.

[0026] Fig.13 It is a schematic diagram of the structure of the rubber bracket fixing the lower seat of the utility model.

[0027] In the figure: 1-cooling medium channel, 2-housing, 3-water inlet, 4-water outlet, 7-rubber bracket, 8-motor housing, 5-front cover, 6-stator winding, 9-electrical socket, 10-annular cavity, 11-rear cover, 12-control component, 13-rear cover sealing ring, 14-waterproof sleeve, 15-front cover sealing ring, 16-impeller rotor assembly, 17-hydraulic cavity, 18-self-tapping screw, 20-jacket, 21-shaft core, 161-impeller, 162-rotor, 163-impeller blade, 164-impeller disk, 191-fixed upper seat positioning hole, 192-fixed lower seat positioning hole, 22-limiting groove. DETAILED DESCRIPTION

[0028] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0029] See also Figures 1 to 13 , the first embodiment of the present application is:

[0030] The utility model provides an injection-molded integrated automotive electronic water pump: comprising a cooling medium channel 1, a housing 2, a front cover 5, a stator winding 6, a rear cover 11, a control component 12, a sealing component, an impeller rotor assembly 16 and a self-tapping screw 18, wherein the cooling medium channel 1 comprises a water inlet 3 and a water outlet 4, the impeller rotor assembly 16 comprises an impeller 161 and a rotor 162, the rubber bracket 7 comprises a fixed upper seat positioning hole 191, a fixed lower seat positioning hole 192 and a limiting groove 22, and the electronic water pump rotor and the impeller can be designed as one body through the above scheme, the impeller rotor assembly is directly driven by the magnetic force of the motor stator winding, and then the integral structure through injection molding eliminates the structure of the flange, thereby reducing the axial size, making the overall structure simple, low in production cost, reducing energy loss, and increasing the fatigue strength of the overall structure.

[0031] In this embodiment, the cooling medium channel 1 is arranged on one side of the front cover 5, the front cover 5 is connected to the motor housing 8 by the self-tapping screws 18, the stator winding 6 is arranged in the motor housing 8, the rear cover 11 is connected to the motor housing 8 by the self-tapping screws 18, the control component 12 is electrically connected to the stator winding 6 and is installed on one side of the motor housing 8, the sealing member is connected to the rear cover 11, the impeller rotor assembly 16 is installed in the motor housing 8, the impeller 161 is composed of an impeller blade 163 and an impeller disk 164, the rotor 162 is arranged on the outside of the impeller rotor assembly 16, the water inlet 3 is located on one side of the front cover 5; the water outlet 4 is located on one side of the front cover 5, the cooling medium channel 1 provided on the front cover 5 includes the water inlet 3 and the water outlet 4, so as to facilitate the inflow and outflow of the corresponding medium, the front cover 5 and the motor housing 8 are connected by the self-tapping screws 18 provided The stator winding 6 is fixed, and the control component 12 is connected through the corresponding control circuit. The side of the front cover 5 is also provided with the corresponding electrical socket 9, so that the user can drive the stator winding 6 through the control component 12. The impeller rotor assembly 16 is composed of the impeller 161 and the rotor 162 provided outside the impeller 161. The impeller 161 and the rotor 162 are formed into one piece by adopting an injection molding manufacturing process, and there is no connecting piece in the middle. The impeller rotor assembly 16 is directly driven to rotate by the stator winding 6. This structure can effectively reduce the axial size of the electronic water pump, make the water pump structure simpler and more compact, and reduce the manufacturing cost. The rear cover 11 is also fixed to the motor housing 8 by the self-tapping screws 18. The outer ring of the motor housing 8 is provided with the rubber bracket 7. The motor housing 8 and the rubber bracket 7 form the housing 2, which is convenient for the overall support and the installation of the corresponding mechanism.

[0032] Among them, the fixed upper seat positioning hole 191 is located on one side of the rubber bracket 7; the fixed lower seat positioning hole 192 is located on one side of the rubber bracket 7; the limiting groove 22 is located on one side of the rubber bracket 7, a through hole is provided in the middle of the rubber bracket 7, and a positioning hole is provided in a direction perpendicular to the water inlet 3, and the positioning holes are provided with the fixed upper seat positioning hole 191 and the fixed lower seat positioning hole 192, and the rubber bracket 7 is also provided with a corresponding limiting groove 22 for adjusting the assembly angle of the electronic water pump.

[0033] When the injection-molded automotive electronic water pump of the present embodiment is in use, the front cover 5 provided with the water inlet 3 and the water outlet 4 is fixedly connected to the front end of the motor housing 8 by the self-tapping screws 18, and the rear cover 11 is also fixedly connected to the rear end of the motor housing 8 by the self-tapping screws 18. The motor housing 8 is a cylindrical structure with openings at both ends, and its bottom is connected to the control component 12. The stator winding 6 is arranged on the inner side of the motor housing 8 and is electrically connected to the control component 12. Under the control of the control component 12, a driving rotating magnetic field is generated, so that the impeller rotor assembly 16 rotates under the action of the rotating magnetic field, so that the electronic water pump rotor 162 and the impeller 161 can be designed as one body. The impeller rotor assembly 16 is directly driven by the magnetic force of the motor stator winding 6, and then the integral structure of injection molding is omitted, thereby reducing the axial size, making the overall structure simple, low in production cost, reducing energy loss, and increasing the fatigue strength of the overall structure.

[0034] Second embodiment:

[0035] The sealing component provided by the utility model comprises a rear cover sealing ring 13 , a watertight sleeve 14 , a front cover sealing ring 15 , an outer sleeve 20 and a shaft core 21 , and the watertight sleeve 14 has an annular cavity 10 .

[0036] Among them, the rear cover sealing ring 13 is installed on one side of the rear cover 11; the watertight sleeve 14 is arranged on the inner side of the stator winding 6, and the open end of the watertight sleeve 14 is connected to the front cover 5 to form a hydraulic cavity 17; the front cover sealing ring 15 is arranged between the front cover 5 and the watertight sleeve 14; the outer sleeve 20 is arranged on one side of the watertight sleeve 14; the shaft core 21 is installed on one side of the watertight sleeve 14, and the watertight sleeve 14 has an annular cavity 10. The watertight sleeve 14 and the shaft core 21 adopt an integrated injection molding manufacturing process, and the shaft core 21 is located at the center of the watertight sleeve 14, and can be slidably connected to the impeller rotor assembly 16. The one-piece molding design makes it possible to have no connection seam between the watertight sleeve 14 and the shaft core 21, thereby increasing the structural integrity and strength of the overall component and reducing the risk of breakage during high-speed operation. At the same time, this design reduces the time of production and assembly, and the structure is simpler. The waterproof sleeve 14 adopts a structure with an open front end and a closed rear end. The overall structure adopts an integrated injection molding design. The opening has a connecting hole to connect the front cover 5 to the motor housing 8 without using a flange. The waterproof sleeve 14 and the volute-shaped front cover 5 form the hydraulic chamber 17. The cooling medium enters from the water inlet 3 and is discharged from the water outlet 4. It passes through an internal circulation system in the middle to take away the heat generated by the generator and the control component 12. The surface of the stator winding 6 is coated with an insulating heat-dissipating material, so that the heat of the stator winding 6 is more uniform and the heat dissipation effect is better. A heat sink is arranged on the motor housing 8 to effectively reduce the heat generated by the overall electronic water pump.

[0037] When using an injection-molded automotive electronic water pump of the present embodiment, the front cover 5 is connected to the open end of the watertight sleeve 14 by using the front cover sealing ring 15, and a hydraulic chamber 17 is formed between the front cover 5 and the open end of the watertight sleeve 14 by docking. The impeller 161 and the rotor 162 are located inside the hydraulic chamber 17. The water inlet 3 and the water outlet 4 connected to the hydraulic chamber 17 are provided on the front cover 5. The front cover 5 is sealed and connected to the watertight sleeve 14 to prevent the liquid in the hydraulic chamber 17 from penetrating to the outside of the motor, which greatly enhances the practicability of the entire device.

[0038] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. An injection-molded automotive electronic water pump, characterized in that: It includes a cooling medium channel, a housing, a front cover, a stator winding, a rear cover, a control component, a sealing member, an impeller rotor assembly and self-tapping screws, and the housing includes a rubber bracket and a motor housing; The cooling medium channel is arranged on one side of the front cover, the front cover is connected to the motor housing by the self-tapping screws, the stator winding is arranged in the motor housing, the rear cover is connected to the motor housing by the self-tapping screws, the control component is electrically connected to the stator winding and is installed on one side of the motor housing, the sealing member is connected to the rear cover, and the impeller rotor assembly is installed in the motor housing; The impeller rotor assembly comprises an impeller and a rotor. The impeller is composed of an impeller blade and an impeller disk. The rotor is arranged outside the impeller rotor assembly. The impeller and the rotor are integrated by adopting an injection molding manufacturing process.

2. The injection-molded automotive electronic water pump according to claim 1, characterized in that: The sealing component includes a rear cover sealing ring, a water-isolating sleeve, a front cover sealing ring, an outer sleeve and an axis core. The rear cover sealing ring is installed on one side of the rear cover; the water-isolating sleeve is arranged on the inner side of the stator winding, and the open end of the water-isolating sleeve is connected to the front cover to form a hydraulic cavity; the front cover sealing ring is arranged between the front cover and the water-isolating sleeve; the outer sleeve is arranged on one side of the water-isolating sleeve; and the axis core is installed on one side of the water-isolating sleeve.

3. The injection-molded automotive electronic water pump according to claim 1, characterized in that: The cooling medium channel comprises a water inlet and a water outlet, wherein the water inlet is located at one side of the front cover; and the water outlet is located at one side of the front cover.

4. The injection-molded automotive electronic water pump according to claim 2, characterized in that: The waterproof sleeve has an annular cavity, and the annular cavity is arranged inside the waterproof sleeve.

5. The injection-molded automotive electronic water pump according to claim 1, characterized in that: The rubber bracket has a fixed upper seat positioning hole, a fixed lower seat positioning hole and a limiting groove, the fixed upper seat positioning hole is located on one side of the rubber bracket; the fixed lower seat positioning hole is located on one side of the rubber bracket; the limiting groove is located on one side of the rubber bracket.

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