Assembly feedback device and assembly process for household water pump

Abstract

The present invention discloses an assembly feedback device for a household water pump, comprising a front end cover, a motor inner cylinder fixedly connected to the front end cover, a front bearing seat sleeved within the motor inner cylinder, the front bearing seat abutting the front end cover, the front bearing seat including a feedback member disposed proximate to the front end cover, a positioning member disposed on the front end cover, and a detection gap disposed radially between the feedback member and the positioning member. The invention can provide coaxiality feedback during the assembly process, ensuring that the coaxiality of the assembled motor assembly is in a relatively good state, and can also promptly adjust assembly parts with poor coaxiality, thereby reducing cost losses.

Description

Technical Field

[0001] The present invention relates to the technical field of water pumps, and in particular to an assembly feedback device and an assembly process of a household water pump. Background Art

[0002] In the daily use process, the places where water pumps are used are gradually increasing. Taking into account the use environment of household water pumps, the long service life and low noise of water pumps have become the main research and development directions in the production process of water pumps. Since the motor components in the water pumps need to move frequently, if the coaxiality is poor, a lot of noise and wear will be generated during the operation. Therefore, there are high requirements for the coaxiality of the motor in the production process. While ensuring quality, it is also necessary to improve production efficiency.

[0003] For example, publication number "CN112324677A" discloses "a cooling water pump with variable speed to achieve precise flow control and its assembly process", which includes a water pump assembly and a motor assembly. The water pump assembly includes a water pump body, which is provided with an internal circulation outlet; the water pump body is provided with a cooling chamber; an internal circulation water channel is provided in the water pump body, one end of the internal circulation water channel is connected to the internal circulation outlet, and the other end is opened on the inner wall surface of the cooling chamber to form an internal circulation water inlet; the cooling chamber is also provided with an internal circulation return water inlet; the motor assembly includes a motor housing, one end of the motor housing extends into the cooling chamber; a cooling groove is provided on the outer wall of the motor housing, and the inner wall surface of the cooling chamber and the cooling groove form a closed cooling chamber; the water in the vortex chamber flows into the internal circulation water channel from the internal circulation outlet, enters the cooling chamber from the internal circulation water inlet, and finally flows back to the vortex chamber through the internal circulation return water inlet. However, the coaxiality of the motor cannot be judged during the current installation process. The coaxiality can only be judged by external detection equipment after the motor assembly is fully assembled. At this time, if the coaxiality does not meet the standard, it can only be scrapped, resulting in an increase in the defective rate, a decrease in the assembly quality of the motor assembly, and an increase in production costs. Summary of the Invention

[0004] In response to the problems of low motor assembly quality and high production cost in the prior art mentioned in the background technology, the present invention provides an assembly feedback device for a household water pump, which can provide coaxiality feedback during the assembly process to ensure that the coaxiality of the assembled motor assembly is in a relatively good state. At the same time, it can make timely adjustments to assembly parts with poor coaxiality to reduce cost losses.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] An assembly feedback device for a household water pump includes a front end cover, to which a motor inner cylinder is fixedly connected, a front bearing seat is sleeved in the motor inner cylinder, the front bearing seat abuts the front end cover, the front bearing seat includes a feedback member arranged near the front end cover, a positioning member is provided on the front end cover, and a detection gap is provided between the feedback member and the positioning member in the radial direction. During the assembly of the motor assembly, the rotor and the shaft need to be connected to multiple components at the same time, including impellers, seals, bearings, etc. Therefore, during the assembly process, the central axes of each component need to be controlled in the same position to ensure that when the shaft is installed, it has good coaxiality. The core connecting component of the shaft is the bearing. Therefore, during the installation process, the positioning between the motor inner cylinder and the front bearing seat is very important. The positioning standard of the front bearing seat is the side wall of the motor inner cylinder. A feedback piece is set on the front bearing seat. When the front bearing seat moves to the bottom of the motor inner cylinder, the front bearing seat abuts against the front end cover. At this time, the feedback piece and the positioning piece are adapted. At this time, a detection gap is left between the feedback piece and the positioning piece. The detection gap is between 0-20 wires. The smaller the detection gap, the better the coaxiality. The better the control, the less likely it is to get 0 thread, so as to avoid the front bearing seat being double-positioned by the locating part and the motor inner tube, and ensure that the positioning standard of the front bearing seat is single. If the feedback part and the locating part abut against each other, a new force will be applied to the tooling pressed into the front bearing seat. The installation is judged by the change in the pressure value of the pressurizing tooling. The pressure range is 3-5N. If it is too small, it means that the interference fit between the front bearing seat and the motor inner tube is too small. If it is too large, it means that the interference fit between the front bearing seat and the motor inner tube is too large or the feedback part abuts against the locating part, generating additional reaction force, so as to make timely judgment and adjustment on the installation quality. At this time, since the whole motor assembly has not been installed yet, secondary adjustment and assembly can be performed, thereby reducing the scrap rate and reducing production costs.

[0007] Preferably, the feedback member is an annular piece, and the positioning member is a round convex block that matches the shape of the annular piece. The annular piece and the circular protrusion cooperate with each other, wherein the circular protrusion is provided on the front end cover as a positioning reference. Since the motor inner cylinder is fixedly connected to the front end cover, the coaxiality standard of the circular protrusion and the motor inner cylinder is consistent. Therefore, when the annular piece and the circular protrusion can be smoothly adapted, it means that the cooperation between the front bearing seat and the motor inner cylinder meets the specified requirements. Preferably, the annular piece includes several annular pieces, and a deformation gap is left between each annular piece. When the coaxiality is poor, the annular piece and the circular protrusion only abut the corresponding annular piece along the offset direction and drive its deformation to reduce the interference. At the same time, the annular piece is not provided as a whole, which can also avoid the annular piece from cracking. Since the motor assembly has not been installed and formed at this time, a secondary correction installation can be performed. Therefore, ensuring the integrity of each component provides a basis for the subsequent shaping and adjustment of the front bearing seat. When the coaxiality is poor, the front bearing seat can be driven to move in the opposite direction of the offset by the adjustment piece for correction, or the positioning standard can be re-corrected by expanding or turning the motor inner cylinder again.

[0008] Preferably, the feedback member is provided with a transition fillet on the side closest to the positioning member. This transition fillet prevents the feedback member from directly contacting the positioning member when there is a misalignment between the coaxiality of the feedback member and the positioning member, ensuring that the pressurizing tool can be pushed inward to the specified position, protecting the various components from damage and providing a margin for error when subsequently adjusting the front bearing seat or the motor inner barrel.

[0009] Preferably, the front bearing seat includes a positioning ring arranged at the edge, the positioning ring is fitted with the motor inner cylinder, the positioning ring includes a plurality of segmented pieces, and a trimming gap is left between each of the segmented pieces. The positioning ring is arranged at the edge of the front bearing seat, and is used to abut and fit with the motor inner cylinder, thereby ensuring that the front bearing seat is fixed with the motor inner cylinder as the positioning standard. The positioning ring is composed of a plurality of segmented pieces, and a trimming gap is left between each segmented piece. When the front bearing seat is installed to the motor inner cylinder, the segmented pieces are squeezed toward the axis, resulting in interference, and the trimming gap shrinks. Subsequently, when the force sensor determines whether the coaxiality is within the standard range, the motor inner cylinder is adjusted accordingly. At the same time, when the edge of the front bearing seat is adaptively adjusted, the individual segmented pieces can be adjusted separately, avoiding the laborious adjustment of the integrated positioning ring and the occurrence of deformation and cracks.

[0010] Preferably, an assembly process for a household water pump comprises the following steps:

[0011] S1. Press the front bearing seat onto the motor inner cylinder to ensure interference fit between the front bearing seat and the motor inner cylinder.

[0012] S2, the front bearing seat abuts against the front end cover, and the feedback part and the positioning part are engaged;

[0013] S3: The concentricity between the front bearing seat and the motor inner cylinder is fed back by the smoothness of the fit between the feedback piece and the positioning piece;

[0014] S4. Assemble the motor assembly and the water pump assembly, connect the motor assembly to the water pump assembly, install the controller on the motor assembly, and then install the water pump housing. The above steps can quickly complete the assembly process of the household water pump. At the same time, the coaxiality can be judged during the assembly process, and timely adjustments can be made after the coaxiality deviation. Since the motor assembly cannot be reprocessed, the motor assembly can be greatly avoided from being scrapped, reducing production costs and improving the yield rate. The installed motor assembly will not affect the positioning standard of the front bearing seat. The positioning standard of the front bearing seat is single, so that the contact force between the front bearing seat and the motor inner cylinder in the circumferential direction is the same everywhere, protecting the smooth operation of the motor assembly. A seal is provided between the controller and the motor assembly. The seal provided between the controller and the motor assembly prevents the water circulating between the water pump assembly and the motor assembly from penetrating into the motor components in the controller, protecting the dry environment inside the controller. At the same time, the seal can also provide shock absorption and buffering for the controller, avoiding rigid collision between the motor assembly and the controller during operation.

[0015] Preferably, in step S1, before the front bearing seat is pressed into the motor inner cylinder, a skeleton seal is installed between the front bearing seat and the front end cover. Before the front bearing seat is pressed into the motor inner cylinder, the skeleton seal is installed between the front bearing seat and the front end cover, and the rotating shaft is subsequently connected to the skeleton seal. This can prevent a large amount of water in the water pump from seeping into the motor interior, thereby protecting the motor operation.

[0016] Preferably, in step S4, assembling the motor assembly includes the following steps:

[0017] A. After the front bearing seat is installed into the motor inner cylinder, assemble the winding into the motor inner cylinder;

[0018] B. Connect the shaft to the rotor, pass the shaft through the bearing on the front bearing seat, and out of the front cover;

[0019] C. After installing the bearing on the rear end cover, connect the bearing to the rotating shaft and fix the rear end cover to the motor inner cylinder and the motor outer cylinder;

[0020] D. Install the impeller assembly near the water pump assembly on the shaft. A reasonable installation sequence ensures a quick installation process. The shaft-to-bearing connection process is placed after the front bearing seat and motor inner barrel installation process. This ensures that the shaft can be installed on the front bearing seat with better coaxiality control, ensuring the accuracy of subsequent installation processes and avoiding excessive scrapping of parts when coaxiality does not meet standards.

[0021] Preferably, in step S4, assembling the water pump assembly includes the following steps:

[0022] a. Install the filter frame in the pump body;

[0023] b. Connect the solenoid valve to the pump body through the quick-connect buckle;

[0024] c. Install a drain connector on the solenoid valve. The filter element and the frame element are integrally formed into a filter frame, which can save installation steps and is more convenient for users to subsequently remove the filter frame. At the same time, the solenoid valve connected through the quick-connect buckle can remotely monitor and start the water pump, realizing automated operation. At the same time, the quick-connect buckle can realize rapid installation and removal of the solenoid valve; the water pump housing is provided with a limiting rib, and when the water pump housing is connected to the water pump assembly, the limiting rib abuts against the quick-connect buckle. When the water pump housing is connected to the main component, the quick-connect buckle on the water pump assembly facilitates the abutment of the limiting ribs, thereby limiting the limiting ribs and preventing the limiting ribs from loosening along the disassembly direction. Therefore, the quick-connect buckle does not need to be set as a snap-fit part, but only needs to be able to be smoothly inserted into the assembly hole to ensure that the radial degree of freedom is limited. The axial degree of freedom of the quick-connect buckle is achieved by abutting the limiting rib, thereby making the installation efficiency of the quick-connect buckle higher and the structure of the quick-connect buckle itself can also be set more simply.

[0025] Preferably, in step S4, after the motor assembly, the water pump assembly and the controller are assembled into the main body, the steps of installing the water pump housing are as follows:

[0026] Step 1: Fix the bottom mold and place the upper shell upside down on the bottom mold, then install the main part and the upper shell;

[0027] Step 2: Then connect and assemble the lower shell with the upper shell and fix it to the main body;

[0028] Step 3: A wire storage groove is provided on the lower shell, and the power cord is pulled out and coiled in the wire storage groove. After the bottom mold is fixed and placed, the groove on the bottom mold that matches the upper shell is facing upward, and then the upper shell is inverted and placed on the bottom mold for fixation, and then the connected main body is placed on the upper shell, and then the lower shell is fixed. Since the power cord of the water pump is generally set at the bottom, this inverted installation method makes the assembly of the power cord more convenient. Preferably, a positioning shaft is provided on the bottom mold, and a mounting hole that matches the water inlet channel and the water outlet channel on the main body is provided on the upper shell. During the installation process, since the shape of the bottom mold matches the upper shell, the positioning shaft can accurately pass through the mounting hole. During the installation of the main body, the positioning shaft is aligned with the water inlet channel and the water outlet channel at the same time to ensure the accurate positioning between the main body and the upper shell, thereby improving the assembly efficiency and assembly quality.

[0029] Preferably, in step S3, after the feedback member and the positioning member abut against each other, the trimming gap between the segmented pieces is changed to adjust the coaxiality. When the feedback member and the positioning member abut against each other during the assembly process, it means that the coaxiality has exceeded the standard range and the front bearing seat and the motor inner cylinder need to be adjusted. At this time, the motor inner cylinder can be expanded outward and the positioning ring can be adaptively adjusted at the same time to change the abutment relationship between the motor inner cylinder and the front bearing seat. At this time, the trimming gap is also corrected and unified again after reinstallation, and the segmented pieces are adjusted separately. Due to the existence of the trimming gap, the adjustment accuracy is improved and the risk of deformation and cracking of the positioning ring during the adjustment process is reduced.

[0030] The beneficial effects of the present invention are as follows:

[0031] (1) The present invention can make a preliminary judgment on the coaxiality during the assembly process of the motor assembly, and can promptly correct the coaxiality if it is unqualified, thereby improving the yield rate in the subsequent shaft runout detection process and reducing production costs;

[0032] (2) By setting up multiple separate annular pieces and setting transition fillets on the annular pieces, large interference, cracks, damage, etc. can be avoided during the assembly process, protecting the integrity of each component and providing a basis for subsequent correction;

[0033] (3) Setting a trimming gap between the segments can protect the locating ring from smooth outward expansion adjustment during the subsequent adjustment process, provide a certain deformation space for the locating ring, avoid distortion and cracks in the locating ring during adjustment, and protect the integrity of the front bearing seat during the secondary adjustment process;

[0034] (4) Improve production efficiency, reduce production costs, and increase assembly fault tolerance through reasonable assembly processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a structural diagram of Example 1.

[0036] Figure 2 This is a cross-sectional view of Example 1.

[0037] Figure 3 It is an axonometric view of the front bearing seat in Example 1.

[0038] Figure 4 This is an axonometric view of the front end cover in Example 1.

[0039] Figure 5 yes Figure 2 Schematic diagram of the structure at point A in the middle.

[0040] Figure 6 It is a structural diagram of Example 2.

[0041] Figure 7This is a front view of Example 2.

[0042] Figure 8 It is a structural diagram of Example 3.

[0043] Figure 9 It is a structural diagram of the motor assembly in Example 3.

[0044] Figure 10 It is a structural schematic diagram of the water pump assembly in Example 3.

[0045] Figure 11 It is a structural schematic diagram of the water pump housing in Example 3.

[0046] In the figure: 1 motor assembly, 11 front end cover, 12 motor inner cylinder, 13 front bearing seat, 14 feedback part, 15 positioning part, 141 annular piece, 151 round bump, 142 transition fillet, 131 positioning ring, 132 segmented piece, 16 skeleton seal, 171 winding, 172 rotor, 173 rotating shaft, 18 rear end cover, 19 impeller assembly, 2 water pump assembly, 21 pump body, 22 filter skeleton, 23 solenoid valve, 24 quick connect buckle, 25 drain connector, 3 controller, 4 water pump housing, 41 upper housing, 411 mounting hole, 43 wire storage groove, 42 lower housing, 5 bottom mold, 51 positioning shaft, 6 power cord. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0048] Example 1:

[0049] like Figure 1 、 2 As shown in Figures 3 and 4, an assembly feedback device for a household water pump includes a front end cover 11, a motor inner cylinder 12 is fixedly connected to the front end cover 11, a front bearing seat 13 is sleeved in the motor inner cylinder 12, the front bearing seat 13 abuts the front end cover 11, the front bearing seat 13 includes a feedback member 14 arranged near the front end cover 11, a positioning member 15 is provided on the front end cover 11, and a detection gap is provided between the feedback member 14 and the positioning member 15 in the radial direction; the feedback member 14 is an annular piece 141, and the positioning member 15 is a round protrusion 151 adapted to the shape of the annular piece 141.

[0050] The positioning standard of the front bearing seat 13 is the side wall of the motor inner cylinder 12. A feedback piece 14 is set on the front bearing seat 13. When the front bearing seat 13 moves to the bottom of the motor inner cylinder 12, the front bearing seat 13 abuts against the front end cover 11. At this time, the feedback piece 14 is adapted to the positioning piece 15. At this time, a detection gap is left between the feedback piece 14 and the positioning piece 15. The detection gap is between 0-20 threads. The smaller the detection gap, the better the coaxiality control. 0 threads cannot be obtained to avoid the front bearing seat 13 being double-positioned by the positioning piece 15 and the motor inner cylinder 12, ensuring the front bearing The positioning standard of the seat 13 is single. If the feedback piece 14 abuts against the positioning piece 15, a new force will be applied to the tooling pressed into the front bearing seat 13. The change in the pressure value of the pressurizing tooling is used to judge whether the installation is standard. The pressure range is 3-5N. If it is too small, it means that the interference between the front bearing seat 13 and the motor inner cylinder 12 is too small. If it is too large, it means that the interference between the front bearing seat 13 and the motor inner cylinder 12 is too large or the feedback piece 14 abuts against the positioning piece 15, generating additional reaction force, thereby making timely judgments and adjustments to the installation quality. Since the whole motor assembly 1 has not been installed yet, secondary adjustment and assembly can be carried out to reduce the scrap rate and reduce production costs; the annular piece 141 and the round protrusion 151 cooperate with each other, wherein the round protrusion 151 is set on the front end cover 11 as a positioning reference. Since the motor inner cylinder 12 is fixedly connected to the front end cover 11, the coaxiality standard of the round protrusion 151 and the motor inner cylinder 12 is consistent. Therefore, when the annular piece 141 and the round protrusion 151 can be smoothly adapted, it means that the cooperation between the front bearing seat 13 and the motor inner cylinder 12 has reached the target. Certain requirements are met, wherein the annular piece 141 includes four pieces, and a deformation gap is left between each annular piece 141. When the coaxiality is poor, the annular piece 141 and the round protrusion 151 only abut against the corresponding annular piece 141 along the offset direction, and drive its deformation to reduce the interference. At the same time, since the annular piece 141 is not arranged as a whole, the annular piece 141 can also be avoided from bursting. Since the motor assembly 1 has not been installed and formed at this time, a secondary corrective installation can be performed, thereby ensuring the integrity of each component to provide a basis for the subsequent shaping and adjustment of the front bearing seat 13.

[0051] like Figure 5 As shown, the feedback member 14 is provided with a transition fillet 142 on the side near the positioning member 15. The transition fillet 142 prevents the feedback member 14 from directly abutting the positioning member 15 when there is a misalignment between the coaxiality of the feedback member 14 and the positioning member 15. This ensures that the pressurizing tool can be pushed inward to the specified position, protects the various components from damage, and provides a margin for error when subsequently adjusting the front bearing seat 13 or the motor inner barrel 12.

[0052] The assembly process of the assembly feedback device of the household water pump in this embodiment is as follows: in this embodiment, first, the skeleton seal 16 needs to be placed on the side of the front bearing seat 13 close to the front end cover 11, and the front bearing seat 13 is pushed into the motor inner tube 12 through the pressurizing tool. When the current bearing seat 13 is close to the front end cover 11, the annular piece 141 and the round protrusion 151 are close to each other. If the pressure display value on the pressurizing tool increases at this time, it means that there is an abutment relationship between the annular piece 141 and the round protrusion 151, and the reserved detection gap disappears, which means that the coaxiality of the front bearing seat 13 and the motor inner tube 12 exceeds the allowable range. At this time, it is necessary to readjust and adjust. At this time, by re-aligning the motor inner tube 12 and the front bearing seat 13 The front bearing seat 13 is sleeved in the motor inner tube 12 and positioned by abutting the inner wall of the motor inner tube 12 with the edge of the front bearing seat 13. Therefore, this method is used to readjust the positioning between the front bearing seat 13 and the motor inner tube 12, so that the motor assembly 1 with poor coaxiality has the opportunity to be corrected again, thereby improving the yield rate. If the pressure display gauge does not change during the matching process of the annular piece 141 and the round protrusion 151, it means that the coaxiality is within the allowable range and subsequent assembly is carried out. This method can be used to preliminarily screen the coaxiality during the assembly process, thereby improving the yield rate after assembly and improving production efficiency. Since the motor assembly 1 cannot be dismantled and repaired for a second time after assembly, production losses are also reduced.

[0053] Example 2:

[0054] like Figure 6 、 7 As shown, different from Example 1, the front bearing seat 13 in this embodiment includes a positioning ring 131 arranged on the edge, the positioning ring 131 is in contact with the motor inner tube 12, and the positioning ring 131 includes segmented pieces 132, and trimming gaps are left between each segmented piece 132. The positioning ring 131 is provided on the edge of the front bearing seat 13, and is used to abut and fit with the motor inner cylinder 12, so as to ensure that the front bearing seat 13 is fixed with the motor inner cylinder 12 as the positioning standard. The positioning ring 131 is composed of a plurality of segmented pieces 132, and a trimming gap is left between each segmented piece 132. When the front bearing seat 13 is installed to the motor inner cylinder 12, the segmented piece 132 is squeezed toward the axis, resulting in an interference fit, and the trimming gap shrinks. Subsequently, when the force sensor is used to determine whether the coaxiality is within the standard range, the corresponding motor inner cylinder is adjusted. At the same time, when the edge of the front bearing seat 13 is adjusted, the individual segmented piece 132 can be adaptively adjusted individually, avoiding the laborious adjustment of the integrated positioning ring 131 and the occurrence of deformation and cracks.

[0055] Example 3:

[0056] like Figure 8 、 9As shown in Figures 10 and 11, this embodiment discloses an assembly process for a household water pump, which includes the following steps:

[0057] S1. Press the front bearing seat 13 onto the motor inner cylinder 12 to ensure interference fit between the front bearing seat 13 and the motor inner cylinder 12.

[0058] S2, the front bearing seat 13 abuts the front end cover 11, and the feedback member 14 cooperates with the positioning member 15;

[0059] S3, feedback the concentricity between the front bearing seat 13 and the motor inner cylinder 12 by the smoothness of the fit between the feedback member 14 and the positioning member 15;

[0060] S4, assembling the motor assembly 1 and the water pump assembly 2, connecting the motor assembly 1 to the water pump assembly 2, installing the controller 3 on the motor assembly 1, and then installing the water pump housing 4;

[0061] In step S1, before the front bearing seat 13 is pressed into the motor inner cylinder 12, the skeleton seal 16 is installed between the front bearing seat 13 and the front end cover 11;

[0062] In step S4, assembling the motor assembly 1 includes the following steps:

[0063] A. After the front bearing seat 13 is installed into the motor inner cylinder 12, assemble the winding 171 into the motor inner cylinder 12;

[0064] B. Connect the rotating shaft 173 to the rotor 172, and pass the rotating shaft 173 through the bearing on the front bearing seat 13 and out of the front end cover 11;

[0065] C. After the bearing is installed on the rear end cover 18, connect the bearing to the rotating shaft 173, and fix the rear end cover 18 to the motor inner cylinder 12 and the motor outer cylinder;

[0066] D. Install the impeller assembly 19 on the rotating shaft 173 near the water pump assembly 2;

[0067] In step S4, assembling the water pump assembly 2 includes the following steps:

[0068] a. Install the filter frame 22 in the pump body 21;

[0069] b. Connect the solenoid valve 23 to the pump body 21 through the quick-connect buckle 24;

[0070] c. Install the drain connector 25 on the solenoid valve 23;

[0071] In step S4, after the motor assembly 1, the water pump assembly 2 and the controller 3 are assembled into the main body, the steps for installing the water pump housing 4 are as follows:

[0072] Step 1: Fix the bottom mold 5 and invert the upper shell 41 on the bottom mold 5, and then install the main body and the upper shell 41;

[0073] Step 2: Then, assemble the lower shell 42 with the upper shell 41 and fix them to the main body.

[0074] Step 3: A wire storage slot 43 is provided on the lower housing 42 , and the power cord 6 is pulled out and coiled in the wire storage slot 43 ;

[0075] In step S3 , after the feedback member 14 abuts against the positioning member 15 , the trimming gap between the segmented pieces 132 is changed to adjust the coaxiality.

[0076] The above steps can quickly complete the assembly process of the household water pump, and the coaxiality can be judged during the assembly process, and timely adjustments can be made after the coaxiality deviation. Since the motor assembly 1 cannot be processed again, the motor assembly 1 can be greatly avoided from being scrapped, the production cost is reduced, and the yield rate is improved. The installed motor assembly 1 will not affect the positioning standard of the front bearing seat 13. The positioning standard of the front bearing seat 13 is single, so that the abutment force between the front bearing seat 13 and the motor inner cylinder 12 in the circumferential direction is the same everywhere, protecting the smooth operation of the motor assembly 1; a seal is provided between the controller 3 and the motor assembly 1; the seal provided between the controller 3 and the motor assembly 1 prevents the water flow circulating between the water pump assembly 2 and the motor assembly 1 from penetrating into the motor components in the controller 3, protecting the dry environment inside the controller 3, and the seal can also provide shock absorption and buffering for the controller 3, avoiding rigid collision between the motor assembly 1 and the controller 3 during operation; before the front bearing seat 13 is pressed into the motor inner cylinder 12, the The skeleton seal 16 is arranged between the front bearing seat 13 and the front end cover 11, and the subsequent rotating shaft 173 is connected to the skeleton seal 16, which can prevent a large amount of water in the water pump from seeping into the interior of the motor and protect the operation of the motor; the installation process is quick through a reasonable installation sequence, and the connection process of the rotating shaft 173 and the bearing is located after the installation process of the front bearing seat 13 and the motor inner tube 12, which can ensure that the rotating shaft 173 can be installed on the front bearing seat 13 with better coaxiality control, ensure the accuracy of the subsequent installation process, and avoid excessive scrapped parts when the coaxiality does not meet the standard; the filter element and the skeleton element are integrally formed into a filter skeleton 22, which can save installation steps and make it more convenient for the user to take the filter skeleton 22 later. At the same time, the solenoid valve 23 connected through the quick-connect buckle 24 can remotely monitor and start the water pump to realize automated operation. At the same time, the quick-connect buckle 24 can realize rapid installation and disassembly of the solenoid valve 23; a limiting rib is provided on the water pump housing 4. When the water pump housing 4 is connected to the water pump assembly 2, the limiting rib abuts against the quick-connect buckle 24.When the water pump housing 4 is connected to the main body component, the quick-connect buckle 24 on the water pump assembly 2 facilitates the limiting ribs to abut together, thereby limiting the limiting ribs and preventing the limiting ribs from loosening along the disassembly direction. Therefore, the quick-connect buckle 24 does not need to be set as a snap-fit part, and only needs to be able to be smoothly inserted into the assembly hole to ensure that the radial freedom is limited. The axial freedom of the quick-connect buckle 24 is achieved by abutting the limiting ribs, thereby making the installation efficiency of the quick-connect buckle 24 higher, and the structure of the quick-connect buckle 24 itself can also be set simpler; after the bottom mold 5 is fixed in place, the groove on the bottom mold 5 that is adapted to the upper shell 41 is facing up, and then the upper shell 41 is inverted and placed on the bottom mold 5 for fixation, and then the connected main body component is placed on the upper shell 41, and then the lower shell 42 is fixed. Since the power cord 6 of the water pump is generally arranged at the bottom, this inverted installation method makes the assembly of the power cord 6 more convenient, wherein a positioning shaft 51 is provided on the bottom mold 5, and a positioning shaft 51 is provided on the upper shell 41 The water inlet channel and the water outlet channel on the main body are adapted to the mounting holes 411. During the installation process, since the shape of the bottom mold 5 is adapted to the upper shell 41, the positioning shaft can accurately pass through the mounting hole. During the installation of the main body, the water inlet channel and the water outlet channel are aligned with the positioning shaft at the same time to ensure the accurate positioning between the main body and the upper shell 41, thereby improving the assembly efficiency and assembly quality; when the feedback part 14 and the positioning part 15 abut during the assembly process, it means that the coaxiality has exceeded the standard range, and the front bearing seat 13 and the motor inner cylinder 12 need to be adjusted. At this time, the motor inner cylinder 12 can be expanded outward, and the positioning ring 131 can be adaptively adjusted at the same time to change the abutment relationship between the motor inner cylinder 12 and the front bearing seat 13. At this time, the trimming gap is also corrected and unified again after reinstallation, and the segmented piece 132 is adjusted separately. Due to the existence of the trimming gap, the adjustment accuracy is improved, and the risk of deformation and cracks of the positioning ring 131 during the adjustment process is reduced.

[0077] In addition to the above-mentioned embodiments, within the scope disclosed in the claims and description of the present invention, the technical features of the present invention can be reselected and combined to form new embodiments. These can be achieved by those skilled in the art without creative work. Therefore, these embodiments that are not described in detail in the present invention should also be regarded as specific embodiments of the present invention and within the scope of protection of the present invention.

Claims

1. An assembly feedback device for a household water pump, characterized in that: It includes a front end cover, to which a motor inner cylinder is fixedly connected, a front bearing seat is sleeved in the motor inner cylinder, the front bearing seat abuts the front end cover, the front bearing seat includes a feedback member arranged close to the front end cover, a positioning member is arranged on the front end cover, and a detection gap is arranged between the feedback member and the positioning member in the radial direction; the front bearing seat includes a positioning ring arranged at the edge, the positioning ring is fitted with the motor inner cylinder, and the positioning ring includes a plurality of segmented pieces, and a trimming gap is left between each of the segmented pieces.

2. The assembly feedback device for a household water pump according to claim 1, characterized in that: The feedback member is an annular piece, and the positioning member is a round convex block that matches the shape of the annular piece.

3. The assembly feedback device for a household water pump according to claim 1 or 2, characterized in that: A transition fillet is provided on one side of the feedback member close to the positioning member.

4. An assembly process for a household water pump, using an assembly feedback device for a household water pump according to any one of claims 1 to 3, characterized in that: The following steps are included: S1. Press the front bearing seat onto the motor inner cylinder to ensure interference fit between the front bearing seat and the motor inner cylinder. S2, the front bearing seat abuts against the front end cover, and the feedback part and the positioning part are engaged; S3. The concentricity between the front bearing seat and the motor inner cylinder is fed back by the smoothness of the fit between the feedback piece and the positioning piece. When the feedback piece and the positioning piece are in contact, the trimming gap between the segmented pieces is changed to adjust the coaxiality. S4. Assemble the motor assembly and the water pump assembly, connect the motor assembly to the water pump assembly, install the controller on the motor assembly, and then install the water pump housing.

5. The assembly process of a household water pump according to claim 4, characterized in that: In step S1 , before the front bearing seat is pressed into the motor inner barrel, the skeleton seal is installed between the front bearing seat and the front end cover.

6. The assembly process of a household water pump according to claim 4, characterized in that: In step S4, assembling the motor assembly includes the following steps: A. After the front bearing seat is installed into the motor inner cylinder, assemble the winding into the motor inner cylinder; B. Connect the shaft to the rotor, pass the shaft through the bearing on the front bearing seat, and out of the front cover; C. After installing the bearing on the rear end cover, connect the bearing to the rotating shaft and fix the rear end cover to the motor inner cylinder and the motor outer cylinder; D. Install the impeller assembly on the shaft near the water pump assembly.

7. The assembly process of a household water pump according to claim 4, characterized in that: In step S4, assembling the water pump assembly includes the following steps: a. Install the filter frame in the pump body; b. Connect the solenoid valve to the pump body through the quick-connect buckle; c. Install the drain connector on the solenoid valve.

8. The assembly process of a household water pump according to claim 4, characterized in that: In step S4, after the motor assembly, water pump assembly and controller are assembled into the main body, the steps for installing the water pump housing are as follows: Step 1: Fix the bottom mold and place the upper shell upside down on the bottom mold, then install the main part and the upper shell; Step 2: Then connect and assemble the lower shell with the upper shell and fix it to the main body; Step 3: There is a wire storage slot on the lower shell. Pull out the power cord and coil it in the wire storage slot.

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