Electronic water pump stator fixing structure

Abstract

The application discloses an electronic water pump stator fixing structure in the technical field of electronic water pumps, which comprises a casing, the casing is provided with a containing cavity, a lower limiting piece is arranged in the containing cavity, an isolating sleeve is arranged in the containing cavity, an installation cavity is formed between the isolating sleeve and the casing, an upper limiting piece is arranged on the isolating sleeve, a stator is arranged in the installation cavity, the top end of the stator is in upper stop cooperation with the upper limiting piece, and the bottom end of the stator is in lower stop cooperation with the lower limiting piece. The bottom end and the top end of the stator are axially limited by the lower limiting piece arranged on the casing and the upper limiting piece arranged on the isolating sleeve, the axial connection and fixing of the casing and the stator are realized, the stator is pressed and assembled between the isolating sleeve and the casing through the upper limiting piece and the lower limiting piece, the radial fixed connection of the casing and the stator is realized, and the axial loosening and the radial loosening between the stator and the casing can be effectively prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic water pump, in particular to a kind of electronic water pump stator fixed structure. BACKGROUND

[0002] At present, electronic water pump is widely applied in the field of automobile. Among them, in the assembly process of electronic water pump, plastic shell and stator need to be connected tightly and fixedly to prevent the stator from being loose radially and axially during work to cause impact and damage to the product;The connecting mode of the shell and the stator of the existing electronic water pump has two kinds: the first is glue fixing, but glue fixing has the disadvantages of complex process and high cost;The second is interference fit, but interference fit will produce excess material, and the cleanliness is not good. SUMMARY

[0003] Therefore, the purpose of the present application is to provide an electronic water pump stator fixing structure to solve the technical problems of complex process, high cost or poor cleanliness of the existing shell and stator connection mode.

[0004] The technical scheme adopted by the present application is: an electronic water pump stator fixing structure, comprising:

[0005] A machine shell having a containing cavity, wherein a lower limiting piece is arranged in the containing cavity;

[0006] An isolation sleeve is installed in the containing cavity, and an installation cavity is formed between the isolation sleeve and the machine shell, and an upper limiting piece is arranged on the isolation sleeve;

[0007] A stator is installed in the installation cavity, and the top end of the stator forms an upper stop cooperation with the upper limiting piece, and the bottom end forms a lower stop cooperation with the lower limiting piece.

[0008] Preferably, the top of the isolation sleeve is provided with elastic arms that can be elastically folded and expanded along the axial direction.

[0009] Preferably, the elastic arm includes an elastic plate and a stress block, one end of the elastic plate is fixedly connected with the isolation sleeve, and the stress block is arranged on one side or both sides of the other end of the elastic plate.

[0010] Preferably, 4-8 elastic arms are circumferentially distributed on the top end of the isolation sleeve.

[0011] Preferably, 4-8 upper limiting pieces are circumferentially distributed on the outer wall of the isolation sleeve;The upper limiting piece is a limiting rib.

[0012] Preferably, the top end of the stator is provided with an anti-misplacement slot, the isolation sleeve is provided with a positioning rib, and the bottom end of the positioning rib is inserted into the anti-misplacement slot.

[0013] Preferably, the machine shell comprises a shell and a volute which can be detachably connected.

[0014] Preferably, the top end of the isolation sleeve is provided with a positioning groove, and the top end of the shell is provided with a positioning boss matched with the positioning groove.

[0015] Preferably, 3-6 lower limit members are circumferentially distributed on the inner wall of the shell; and the lower limit member is a positioning column.

[0016] Preferably, the stator is gap-fitted between the shell and the isolation sleeve.

[0017] The present application has the following beneficial effects:

[0018] 1. The bottom end and the top end of the stator are respectively axially limited by the lower limit member arranged on the shell and the upper limit member arranged on the isolation sleeve, so that the shell and the stator are axially connected and fixed; meanwhile, the positioning rib on the isolation sleeve and the anti-misplacement slot on the stator are inserted and fitted, and the positioning boss on the shell and the positioning groove on the isolation sleeve are inserted and fitted, so that the stator, the isolation sleeve and the shell are circumferentially and radially positioned and connected.

[0019] 2. The top end of the isolation sleeve is provided with an elastic arm which can be axially contracted and expanded, and the elastic deformation of the elastic arm can keep an axial force between the isolation sleeve, the stator and the shell, which can not only prevent the axial loosening of the stator and the shell, but also offset the manufacturing error of the stator and the shell. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Fig. 1 is a structural schematic diagram of the present application;

[0021] Figure 2 Fig. 2 is a structural schematic diagram of the elastic arm of the present application;

[0022] Figure 3 Fig. 3 is a perspective schematic diagram of the isolation sleeve of the present application;

[0023] Figure 4 Fig. 4 is a top view of the isolation sleeve of the present application;

[0024] Figure 5 Fig. 5 is a structural schematic diagram of the shell of the present application;

[0025] Figure 6 Fig. 6 is a structural schematic diagram of the stator of the present application;

[0026] Figure 7 Fig. 7 is a connection schematic diagram of the isolation sleeve and the shell of the present application.

[0027] Marked in the drawing:

[0028] 10 - shell; 11 - lower limit member; 12 - positioning boss;

[0029] 20 - volute;

[0030] 30-isolating sleeve; 31-upper limiting member; 32-elastic arm; 321-elastic plate; 322-force block; 33-positioning rib; 34-positioning groove;

[0031] 40-stator; 41-anti-misplacement slot;

[0032] 50-sealing ring. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings. These embodiments are only used to illustrate the present application, and are not a limitation of the present application.

[0034] In the description of the present application, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0037] Embodiments, such as Figures 1-7 As shown in the drawings, an electronic water pump stator fixing structure comprises:

[0038] The shell has a containing cavity, and the containing cavity is provided with a lower limiting member 11;

[0039] The isolating sleeve 30 is installed in the containing cavity, and the isolating sleeve 30 and the shell form an installation cavity therebetween, and the isolating sleeve 30 is provided with an upper limiting member 31;

[0040] The stator 40 is installed in the installation cavity, the top end of the stator 40 forms an upper stop cooperation with the upper limiting piece 31, and the bottom end forms a lower stop cooperation with the lower limiting piece 11, so that the stator 40 is fixedly connected between the casing and the isolation sleeve 30, and axial looseness and radial looseness between the stator 40 and the casing are prevented.

[0041] The bottom end and the top end of the stator 40 are axially limited by the lower limiting piece 11 arranged on the casing and the upper limiting piece 31 arranged on the isolation sleeve 30, the axial connection and fixation of the casing and the stator 40 are realized, the stator 40 is press-fitted between the isolation sleeve 30 and the casing through the upper limiting piece 31 and the lower limiting piece 11, the radial fixed connection of the casing and the stator 40 is realized, and the axial looseness and the radial looseness between the stator 40 and the casing are effectively prevented.

[0042] In a specific embodiment, as shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 The top of the isolation sleeve 30 is provided with elastic arms 32 that can be elastically contracted and expanded along the axial direction. In this way, when the isolation sleeve 30 is installed in the accommodating cavity of the casing, the casing will exert an axial force on the isolation sleeve 30, and the elastic arms 32 will be elastically deformed under the action of the axial force, so that an axial force is maintained between the isolation sleeve 30, the stator 40 and the casing after the installation of the isolation sleeve 30 and the casing, and the axial looseness between the stator 40 and the casing is effectively prevented under the action of the axial force.

[0043] Preferably, 4-8 elastic arms 32 are circumferentially distributed on the top end of the isolation sleeve 30. In this way, the elastic restoring force of the elastic arms 32 can act uniformly on the casing and the stator 40 along the axial direction. Specifically, the elastic arm 32 includes an elastic plate 321 and a stress block 322, the elastic plate 321 is arranged along the radial direction, one end of the elastic plate 321 is fixedly connected with the isolation sleeve 30, and the stress block 322 is arranged on one side or both sides of the other end of the elastic plate 321. In this way, the abutment of the stress block 322 and the casing facilitates the transfer of the axial force received by the isolation sleeve 30 when the isolation sleeve 30 is installed in the casing to the elastic arm 32, and the elastic arm 32 is elastically deformed along the axial direction, so that an axial force is maintained between the isolation sleeve 30, the stator 40 and the casing after the installation of the isolation sleeve 30 and the casing.

[0044] In a specific embodiment, as shown in Figure 4 4-8 upper limiting pieces 31 are circumferentially distributed on the outer wall of the isolation sleeve 30; the upper limiting piece 31 is an L-shaped limiting rib. In this way, the isolation sleeve 30 is facilitated to be processed and formed, and the cost is low.

[0045] In a specific embodiment, as shown in Figure 3 , Figure 6As shown, the top end of the stator 40 is provided with an anti-misplacement slot 41, the number of which can be one or multiple distributed in the circumference; the isolating sleeve 30 is provided with a positioning rib 33, which is in one-to-one correspondence with the anti-misplacement slot 41 in the circumferential direction, and the bottom end of the positioning rib 33 is inserted into the anti-misplacement slot 41. In this way, through the insertion and cooperation of the positioning rib 33 on the isolating sleeve 30 and the anti-misplacement slot 41 of the stator 40, the circumferential rotation between the stator and the isolating sleeve 30 can be prevented.

[0046] In a specific embodiment, as shown in Figure 1 、 Figure 7 , the shell comprises a shell body 10 and a volute 20 arranged in an upper and lower manner and detachably connected; the stator 40 is gap-fitted with the shell body 10, the isolating sleeve 30 is gap-fitted with the stator 40, and the top end of the isolating sleeve 30 is sealingly connected with the bottom end of the volute 20 and the top end of the shell body 10 through a sealing ring 50 respectively; the elastic arm 32 at the top end of the isolating sleeve 30 is pressed between the volute 20 and the shell body 10.

[0047] Preferably, as shown in Figure 3 、 Figure 5 、 Figure 7 , the top end of the isolating sleeve 30 is provided with a positioning groove 34, the number of which can be one or multiple distributed in the circumference; the top end of the shell body 10 is provided with a positioning boss 12 in one-to-one correspondence with the positioning groove 34, and when the isolating sleeve 30 is installed in the accommodating cavity of the shell body 10, the positioning boss 12 on the shell body 10 is inserted into the positioning groove 34 at the top end of the isolating sleeve 30 in one-to-one correspondence. In this way, through the cooperation of the positioning boss 12 on the shell body 10 and the positioning groove 34 on the isolating sleeve 30, the radial fixed connection of the shell body 10 and the isolating sleeve 30 is realized, so as to prevent the radial looseness between the stator 40 and the shell body 10.

[0048] More preferably, as shown in Figure 1 , the bottom end of the volute 20 and the top end of the shell body 10 are fixedly connected through three self-tapping screws. After the volute 20 and the shell body 10 are fixedly connected, the elastic arm 32 between the volute 20 and the shell body 10 is flattened, so that the top end of the isolating sleeve 30 is clamped between the volute 20 and the shell body 10, and an axial force is kept between the isolating sleeve 30, the stator 40 and the shell body 10, so as to balance the axial fit tolerance.

[0049] Further preferably, as shown in Figure 5 , 3-6 lower limit parts 11 are distributed in the circumferences on the inner wall of the shell body 10; the lower limit part 11 is a positioning column. In this way, the shell body 10 is convenient for processing and molding, and the cost is low.

[0050] Compared with the prior art, the present application has at least the following beneficial technical effects:

[0051] 1、The application realizes the fixed close connection of the stator 40 and the shell 10 through the elastic deformation of the elastic arm 32 arranged at the top end of the isolation sleeve 30, prevents the axial looseness, offsets the manufacturing error of the stator 40 and the shell 10, makes the compression more close, and is beneficial to the process assembly.

[0052] 2、The application realizes the radial fixed connection between the isolation sleeve 30, the stator 40 and the shell 10 through the insertion fitting of the anti-misplacement slot 41 on the stator 40 and the positioning rib 33 on the isolation sleeve 30, and the cooperation of the positioning boss 12 on the shell 10 and the positioning groove 34 on the isolation sleeve 30, which can effectively prevent the radial looseness of the stator 40.

[0053] The above is only the preferred embodiment of the application, and it should be pointed out that the ordinary skilled in the art can make several improvements and replacements without departing from the technical principles of the application, and these improvements and replacements should be considered as the protection scope of the application.

Claims

1. A stator fixing structure for an electronic water pump, characterized in that, The utility model relates to a kind of motor, including: Casing, the casing has accommodating cavity, lower limiting piece (11) is equipped in the accommodating cavity, the casing includes detachably connected shell (10) and volute (20), and lower limiting piece (11) is arranged on shell (10); Isolation sleeve (30), the isolation sleeve (30) is installed in accommodating cavity, installation cavity is formed between isolation sleeve (30) and shell (10), and upper limiting piece (31) is equipped on isolation sleeve (30); Stator (40), the stator (40) is installed in installation cavity, and the top end of stator (40) forms upper stop cooperation with upper limiting piece (31), and bottom end forms lower stop cooperation with lower limiting piece (11); The top of the isolation sleeve (30) is equipped with the elastic arm (32) that can be elastically contracted and opened along axial direction, one end of the elastic arm (32) is fixedly connected with the isolation sleeve (30), the other end of the elastic arm (32) is clamped between shell (10) and volute (20), and the elastic arm (32) elastically deforms and makes isolation sleeve (30), stator (40) and shell (10) keep axial action force.

2. The electronic water pump stator fixing structure according to claim 1, characterized by The elastic arm (32) includes elastic plate (321) and force block (322), one end of the elastic plate (321) is fixedly connected with the isolation sleeve (30), and force block (322) is arranged on one side or both sides of the other end of elastic plate (321).

3. The electronic water pump stator fixing structure according to claim 2, characterized by 4-8 The elastic arm (32) is evenly distributed on the top end of the isolation sleeve (30).

4. The electronic water pump stator fixing structure according to claim 1, characterized by 4-8 The upper limiting piece (31) is evenly distributed on the outer wall of the isolation sleeve (30);The upper limiting piece (31) is limiting rib.

5. The electronic water pump stator fixing structure according to claim 1, characterized by The top end of the stator (40) is equipped with anti-misplacement slot (41), the isolation sleeve (30) is equipped with positioning rib (33), and the bottom end of the positioning rib (33) is inserted into anti-misplacement slot (41).

6. The electronic water pump stator fixing structure according to claim 1, wherein The top end of the isolation sleeve (30) is equipped with positioning groove (34), and the top end of the shell (10) is equipped with positioning boss (12) matched with positioning groove (34).

7. The electronic water pump stator fixing structure according to claim 1, wherein 3-6 The lower limiting piece (11) is evenly distributed on the inner wall of the shell (10);The lower limiting piece (11) is positioning column.

8. The electronic water pump stator fixing structure according to claim 1, wherein The stator (40) is gap fitted between casing body (10) and isolation sleeve (30).

Images