Device for assembling electric machines and impellers

Abstract

This disclosure provides an apparatus for assembling a motor and an impeller. The apparatus includes a first positioning member and a second positioning member. The first positioning member has a first limiting groove, a first abutting plane, and a first side surface. The first limiting groove extends through the first abutting plane and the first side surface. The first limiting groove has two limiting surfaces that clearance-fit with two outer circular surfaces of the flat end of the output shaft. The extending direction of the first limiting groove is perpendicular to the flat surface of the flat end of the output shaft. The second positioning member has a second abutting plane for abutting against the other end of the impeller and a second side surface for engaging with the volute casing. The second abutting plane is parallel to the first abutting plane. This disclosure can improve assembly efficiency.

Description

Technical Field

[0001] This disclosure relates to the field of assembly technology, and in particular to an apparatus for assembling a motor and an impeller. Background Technology

[0002] Parking air conditioners are typically used in vehicles such as trucks and RVs when parked. A parking air conditioner consists of a housing, a motor installed within the housing, and an impeller connected to the motor's output shaft.

[0003] In related technologies, when assembling the motor and impeller within the volute casing, the motor's position is typically adjusted first, ensuring that the end of the motor's output shaft extends vertically into the end face of the impeller's fastening end. Then, the impeller's position is manually adjusted to ensure uniform clearance between both ends of the impeller and the volute casing. Finally, using a torque gun, one end of the screw connected to the impeller's fastening end is aligned radially with the motor's output shaft, thus connecting the motor's output shaft to the impeller. Notably, the end of the motor's output shaft is a flat shaft structure, and the screw needs to be fixed to the flat surface of this structure, rather than its outer cylindrical surface. The flat surface is obtained by cutting the outer cylindrical surface of the output shaft.

[0004] To ensure that the screw contacts only the flat surface of the motor's output shaft and not its outer cylindrical surface after tightening, the screw's insertion depth can be checked during tightening. In practice, after the motor's output shaft is inserted into the impeller, a torque gun with a rotation counter is used to tighten the screw. First, the torque gun is set to the theoretical number of rotations *n* corresponding to the screw being driven into the flat surface. Then, during the screw-in process, if the actual number of rotations after tightening is less than *n*, it indicates that the screw is not in contact with the flat surface, and the torque gun will issue an alarm indicating an installation error. Whether the screw is tightened can be verified by setting the torque in the torque gun. For example, if the preset torque value of the torque gun during screw-in is *N*, and the torque is greater than *N* during tightening, it indicates that the screw is tightened, and the torque gun stops driving the screw to continue rotating.

[0005] However, since the above installation process is all done manually, the installation accuracy will vary depending on the operator's experience. Moreover, using a torque gun to control the screw insertion depth is complex, time-consuming, labor-intensive, and inefficient. Utility Model Content

[0006] This disclosure provides an apparatus for assembling a motor and an impeller, which can improve assembly efficiency. The technical solution is as follows:

[0007] This disclosure provides an apparatus for assembling a motor and an impeller. The apparatus includes a first positioning member and a second positioning member. The first positioning member has a first limiting groove for accommodating a flat end of the motor's output shaft, a first abutting plane for abutting one end of the impeller, and a first side surface arranged opposite to one side of the motor. The first abutting plane and the first side surface are arranged opposite to each other. The first limiting groove extends from a side wall of the first positioning member toward the middle of the first positioning member. The side wall is located between the first abutting plane and the first side surface, and the first limiting groove penetrates through the first abutting plane and the first side surface. The first limiting groove has two limiting surfaces that have a clearance fit with two outer circular surfaces of the flat end of the output shaft. The two limiting surfaces are two opposite groove walls of the first limiting groove. The extending direction of the first limiting groove is perpendicular to the flat surface of the flat end of the output shaft. The second positioning member has a second abutting plane for abutting the other end of the impeller and a second side surface arranged opposite to the volute. The second abutting plane is parallel to the first abutting plane.

[0008] In another implementation of this disclosure, the first positioning member is a plate-shaped structural member, the first abutting plane is a plate surface of the first positioning member facing the second positioning member, and the first side surface is a plate surface of the first positioning member away from the second positioning member; the second positioning member is a plate-shaped structural member, the second abutting plane is a plate surface of the second positioning member facing the first positioning member, and the second side surface is a plate surface of the second positioning member away from the first positioning member; the first positioning member and the second positioning member have the same thickness in the direction perpendicular to the first abutting plane.

[0009] In another implementation of this disclosure, the sidewall where the first limiting groove is located is a plane for contacting the bottom wall of the vortex shell.

[0010] In another implementation of this disclosure, the device for assembling the motor and impeller further includes a first limiting structure located on the first side. The first limiting structure is connected to the first positioning member and defines a space for accommodating a portion of the volute housing. The first limiting structure includes two first clamping plates located on opposite sides of the first limiting groove and on the same plane. The plane containing the two first clamping plates is perpendicular to the first abutment plane.

[0011] In another implementation of this disclosure, the outer peripheral wall of the first positioning member includes a first arc surface, two second arc surfaces, and a middle plane. The two ends of the first arc surface are respectively connected to one end of the two second arc surfaces, and the other ends of the two second arc surfaces are respectively connected to the two ends of the middle plane. The first arc surface is located on one side of the plane where the first card plate is located, and the two second arc surfaces and the middle plane are all located on the other side of the plane where the first card plate is located. The radius of the first arc surface is greater than the radius of the second arc surface.

[0012] In another implementation of this disclosure, the bottom of the first limiting groove is located on the same plane as the first card plate.

[0013] In another implementation of this disclosure, the first arc surface protrudes outward along a direction away from the first limiting groove to form an extension portion, and the extension portion is located on the same plane as the first positioning member.

[0014] In another implementation of this disclosure, the second positioning member has a second limiting groove for accommodating the shaft end of the impeller. The second limiting groove extends from the side wall of the second positioning member toward the middle of the second positioning member. The extension direction of the second limiting groove is the same as the extension direction of the first limiting groove. The second limiting groove penetrates the second abutment plane and the second side surface. The side wall where the second limiting groove is located is a plane for contacting the bottom wall of the vortex shell.

[0015] In another implementation of this disclosure, the device for assembling the motor and impeller further includes a second limiting structure located on the second side. The second limiting structure is connected to the second positioning member and defines a space for accommodating a portion of the volute housing. The second limiting structure includes two second clamping plates located on opposite sides of the second limiting groove and on the same plane. The plane containing the two second clamping plates is perpendicular to the second abutment plane.

[0016] In another implementation of this disclosure, the second limiting structure includes an upper plate and a lower plate located on the plane of the second card plate, the upper plate and the second limiting groove being located on the same side of the second card plate, and the width of the upper plate along the extension direction perpendicular to the second limiting groove being greater than the width of the lower plate along the extension direction perpendicular to the second limiting groove.

[0017] The beneficial effects of the technical solutions provided in this disclosure are:

[0018] When the device for assembling a motor and impeller provided in the embodiments of this disclosure installs the motor and impeller inside the volute casing, since the device includes a first positioning member and a second positioning member, and the first and second positioning members are respectively clamped between the two ends of the impeller and the volute casing, during installation, the motor and impeller are first placed in the installation area inside the volute casing, and then the first positioning member is clamped between the end face of the turbine facing the motor and the volute casing, and the second positioning member is clamped between the other end of the impeller and the volute casing. Since the first positioning member has a first abutting surface and the second positioning member has a second abutting surface, the position of the two ends of the impeller can be indirectly restricted by placing the first and second positioning members outside the two ends of the impeller, so that the gap between the two ends of the impeller and the volute casing is uniform.

[0019] Next, since the first positioning component has a first limiting groove that penetrates the first abutting plane and the first side surface, and the first limiting groove is used to accommodate the motor's output shaft, when placing the first positioning component, the position of the motor, etc., can be adjusted at any time so that the motor's output shaft can be limited in the first limiting groove while being inserted into the fastening end face of the impeller. Furthermore, since the extension direction of the first limiting groove is perpendicular to the flat surface of the flat end of the output shaft, and the first limiting groove has two limiting surfaces that have a clearance fit with the two outer circular surfaces of the flat end of the output shaft, the flat surface of the motor's output shaft can face upwards when limited in the first limiting groove. Then, the impeller is rotated so that the axial direction of the mounting screw hole on the fastening end face of the impeller is exactly the same as the extension direction of the first limiting groove. At this time, the screw on the fastening end face of the impeller is screwed into the motor's output shaft. Simply ensuring the screw is tightened is sufficient to ensure that after tightening, the screw abuts against the flat surface of the motor's output shaft, rather than contacting the outer circular surface, greatly improving assembly efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the device for assembling the motor and impeller in use according to an embodiment of this disclosure;

[0022] Figure 2 for Figure 1 A schematic diagram of the structure of the first positioning component;

[0023] Figure 3 for Figure 1 A schematic diagram of the structure of the second positioning component;

[0024] Figure 4 for Figure 2 The right view in the middle;

[0025] Figure 5 for Figure 2 The front view in the middle;

[0026] Figure 6 for Figure 2 Top view;

[0027] Figure 7 for Figure 3 The front view;

[0028] Figure 8 for Figure 3 The right view in the middle;

[0029] Figure 9 for Figure 3 Top view;

[0030] Figure 10 A schematic diagram illustrating the assembly process of the motor and impeller;

[0031] Figure 11 for Figure 10 An enlarged view of the left side area after the first positioning component is installed.

[0032] The symbols in the diagram represent the following meanings:

[0033] 100, Motor; 200, Volute; 300, Impeller;

[0034] 1. First positioning component; 101. First limiting groove; 1011. Groove bottom; 102. First abutting plane; 103. First side surface; 111. First arc surface; 112. Second arc surface; 113. Intermediate plane; 13. Extension;

[0035] 2. Second positioning element; 202. Second abutting plane; 203. Second side surface; 204. Second limiting groove; 205. Through hole;

[0036] 3. First limiting structure; 31. First clamping plate;

[0037] 4. Second limiting structure; 41. Second clamping plate. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this disclosure clearer, the embodiments of this disclosure will be described in further detail below with reference to the accompanying drawings.

[0039] This disclosure provides an apparatus for assembling a motor and an impeller, such as... Figure 1As shown, the device for assembling the motor and the impeller includes a first positioning element 1 and a second positioning element 2 for clamping between the two ends of the impeller and the volute.

[0040] Figure 2 for Figure 1 The structural diagram of the first positioning component in the diagram, combined with... Figure 2 The first positioning member 1 has a first limiting groove 101 for accommodating the flat end of the output shaft of the motor, a first abutting plane 102 for abutting one end of the impeller, and a first side surface 103 for being arranged opposite to one side of the motor and engaging with the volute. The first abutting plane 102 and the first side surface 103 are arranged opposite to each other. The first limiting groove 101 extends from the side wall of the first positioning member 1 toward the middle of the first positioning member 1. The side wall is located between the first abutting plane 102 and the first side surface 103, and the first limiting groove 101 penetrates the first abutting plane 102 and the first side surface 103. The first limiting groove 101 has two limiting surfaces that are clearance-fitted with the two outer circular surfaces of the flat end of the output shaft. The two limiting surfaces are the two opposite groove walls of the first limiting groove 101. The extending direction of the first limiting groove 101 is perpendicular to the flat surface of the flat end of the output shaft.

[0041] Figure 3 for Figure 1 The structural diagram of the second positioning component in the diagram, combined with Figure 3 The second positioning member 2 has a second abutting plane 202 for abutting against the other end of the impeller and a second side surface 203 for engaging with the volute. The second abutting plane 202 is parallel to the first abutting plane 102.

[0042] When the device for assembling a motor and impeller provided in the embodiments of this disclosure is used to install the motor and impeller inside the volute casing, since the device includes a first positioning member 1 and a second positioning member 2, and the first positioning member 1 and the second positioning member 2 are respectively clamped between the two ends of the impeller 300 and the volute casing 200, during installation, the motor 100 and the impeller are first placed in the installation area inside the volute casing, and then the first positioning member 1 is clamped between the end face of the turbine facing the motor and the volute casing, and the second positioning member 2 is clamped between the other end of the impeller and the volute casing. Since the first positioning member 1 has a first abutting surface 102 and the second positioning member 2 has a second abutting surface 202, the position of the two ends of the impeller can be indirectly restricted by placing the first positioning member 1 and the second positioning member 2 outside the two ends of the impeller, so that the gap between the two ends of the impeller and the volute casing is uniform.

[0043] Next, since the first positioning member 1 has a first limiting groove 101, which connects the first abutting plane 102 and the first side surface 103, and is used to accommodate the output shaft of the motor, when the first positioning member 1 is placed, the position of the motor, etc., can be adjusted at any time so that the output shaft of the motor can be limited in the first limiting groove 101 while being inserted into the fastening end face of the impeller. Furthermore, since the extending direction of the first limiting groove 101 is perpendicular to the flat surface of the flat end of the output shaft, and the first limiting groove 101 has two limiting surfaces that have clearance fit with the two outer circular surfaces of the flat end of the output shaft, when the output shaft of the motor is limited in the first limiting groove 101, the flat surface can face upwards. Then, rotate the impeller so that the axial direction of the hole of the mounting screw on the fastening end face of the impeller is exactly the same as the extension direction of the first limiting groove 101. At this time, screw the screw on the fastening end face of the impeller into the output shaft of the motor. Only by tightening the screw can it be ensured that the screw can abut against the flat surface of the output shaft of the motor after tightening, rather than contacting the outer circular surface, which greatly improves the assembly efficiency.

[0044] For example, the thickness of the first positioning member 1 and the second positioning member 2 in the direction perpendicular to the first abutment plane 102 is not greater than (equal to or slightly less than) the theoretical clearance between the two ends of the impeller and the volute after assembly. Here, "slightly less than" means that it is sufficient to ensure that the first positioning member 1 and the second positioning member 2 can be smoothly inserted and that there is a uniform small clearance fit between them and the impeller and the volute after insertion.

[0045] Combination Figure 1 The first positioning member 1 is a plate-shaped structural member, the first abutting plane 102 is a plate surface of the first positioning member 1 facing the second positioning member 2, and the first side surface 103 is a plate surface of the first positioning member 1 away from the second positioning member 2.

[0046] The second positioning member 2 is a plate-shaped structural member. The second abutting plane 202 is a plate surface of the second positioning member 2 facing the first positioning member 1, and the second side 203 is a plate surface of the second positioning member 2 away from the first positioning member 1. The first positioning member 1 and the second positioning member 2 have the same thickness in the direction perpendicular to the first abutting plane 102.

[0047] The first positioning component 1 and the second positioning component 2 are designed as plate-shaped structures, which not only simplifies the structure but also facilitates their insertion between the two ends of the impeller and the volute. Furthermore, by setting the thickness of the first positioning component 1 and the second positioning component 2 to be the same, a uniform gap between the two ends of the impeller and the volute can be ensured when they are clamped between them.

[0048] See Figure 2Optionally, the side wall where the first limiting groove 101 is located is a plane for contacting the bottom wall of the vortex shell.

[0049] In the above implementation, setting the side wall where the first limiting groove 101 is located as a horizontal plane allows the first positioning member 1 to be placed horizontally on the bottom wall of the volute, which facilitates the placement of the first positioning member 1.

[0050] Figure 4 for Figure 2 The right view in the middle, combined with Figure 4 Optionally, the device for assembling the motor and impeller further includes a first limiting structure 3, which is located on the first side 103. The first limiting structure 3 is connected to the first positioning member 1 and defines a space for accommodating a portion of the volute housing.

[0051] In the above implementation, the first positioning member 1 is used to clamp between the end of the impeller facing the motor and the volute, and the first limiting structure 3 is used to limit the first positioning member 1 when it is inserted between the end of the impeller and the volute to prevent over-insertion.

[0052] Figure 5 for Figure 2 The front view in the middle, combined with Figure 5 Optionally, the first limiting structure 3 includes two first locking plates 31, which are located on opposite sides of the first limiting groove 101 and on the same plane. The plane where the two first locking plates 31 are located is perpendicular to the first abutting plane 102.

[0053] In the above implementation, the first limiting structure 3 is set as a structure of two first clamping plates 31, which can prevent the first limiting structure 3 from interfering with the motor, and at the same time, the first clamping plates 31 can be limited by overlapping the top wall of the volute.

[0054] For example, the first clamping plate 31 is an L-shaped plate, and one side is embedded in the side wall of the first positioning member 1 and the plate surface opposite to the first abutting plane. The other side of the first clamping plate 31 defines an L-shaped cavity, and the L-shaped cavity is used to provide installation space for the screws and other structures assembled in the volute, so as to avoid the screws from interfering with the first clamping plate 31.

[0055] Optionally, the first positioning element 1 is an irregular arc plate, and the outer peripheral wall of the first positioning element 1 includes a first arc surface 111, two second arc surfaces 112, and a middle plane 113. The two ends of the first arc surface 111 are respectively connected to one end of the two second arc surfaces 112, and the other ends of the two second arc surfaces 112 are respectively connected to the two ends of the middle plane 113.

[0056] The first arc surface 111 is located on one side of the plane where the first card plate 31 is located, and the two second arc surfaces 112 and the intermediate plane 113 are all located on the other side of the plane where the first card plate 31 is located. The radius of the first arc surface 111 is ( Figure 5 R1 in the second arc surface 112 is greater than the radius of the second arc surface 112. Figure 5 (R2 in the middle).

[0057] In the above implementation, limiting the shape of the first positioning member 1 to the above structure not only allows the first arc surface 111 to match the circular outer circumference of the impeller as much as possible, thus preventing the first positioning member 1 from occupying too much space, but also allows the first positioning member 1 to be placed flat on the bottom wall of the volute shell through the intermediate plane 113. Moreover, setting the radius of the second arc surface 112 to be smaller than the radius of the first arc surface 111 can make the space occupied by the first positioning member 1 between the impeller and the volute shell smaller, preventing interference with other structures.

[0058] Optionally, the bottom 1011 of the first limiting groove 101 is located on the plane where the first card plate 31 is located.

[0059] In the above implementation, the bottom 1011 of the first limiting groove 101 is located on the plane of the first card plate 31. This allows the first positioning member 1 to be inserted between the impeller and the volute, with the maximum insertion depth just enough to make the output shaft contact the top wall of the first limiting groove 101.

[0060] Optionally, the first arc surface 111 protrudes outward along the direction away from the first limiting groove 101 to form an extension 13, and the extension 13 is located on the same plane as the first positioning member 1.

[0061] In the above implementation, the extension 13 facilitates manual operation of the first positioning member. That is, by providing the extension 13, it is easy to pick up and put down the first positioning member 1.

[0062] Figure 6 for Figure 2 Top view, combined Figure 6 For example, the extension 13 is a strip plate, and the extension direction is the same as the extension direction of the first limiting groove 101.

[0063] In this embodiment, for ease of processing, the first positioning member 1 is an axisymmetric structure, and the axis of symmetry of the first positioning member 1 is the center line of the first limiting groove 101 located in its own extension direction.

[0064] Figure 7 for Figure 3 The front view, combined with Figure 7Optionally, the second positioning member 2 has a second limiting groove 204, which extends from the side wall of the second positioning member 2 towards its center. The side wall containing the second limiting groove 204 is a plane for contacting the bottom wall of the volute. The extending direction of the second limiting groove 204 is the same as that of the first limiting groove 101, and the second limiting groove 204 penetrates the second abutment plane 202 and the second side surface 203. The side wall containing the second limiting groove 204 is a plane for contacting the bottom wall of the volute.

[0065] In the above implementation, a second limiting groove 204 is provided in the second positioning member 2, which can provide an installation base for the output shaft of the impeller. At the same time, setting the side wall where the second limiting groove 204 is located to be a plane that contacts the bottom wall of the volute also facilitates the placement of the second positioning member 2.

[0066] Figure 8 for Figure 3 The right view in the middle, combined with Figure 8 Optionally, the device for assembling the motor and impeller further includes a second limiting structure 4, which is located on the second side 203. The second limiting structure 4 is connected to the second positioning member 2 and defines a space for accommodating a portion of the volute housing.

[0067] In the above implementation, the second limiting structure 4 is used to limit the second positioning member 2 when it is inserted between the other end of the impeller and the volute, so as to prevent over-insertion.

[0068] Figure 9 for Figure 3 Top view, combined Figure 9 Optionally, the second limiting structure 4 includes two second locking plates 41, which are located on opposite sides of the second limiting groove 204 and on the same plane. The plane on which the two second locking plates 41 are located is perpendicular to the second abutment plane 202.

[0069] In the above implementation, the second limiting structure 4 is set as a structure of two second clamping plates 41, which can prevent the second limiting structure 4 from interfering with the vortex shell, and at the same time limit the insertion depth of the second positioning member 2 by having the second clamping plates 41 overlap on the top wall of the vortex shell.

[0070] For example, the second clamping plates 41 are all flat plates, and one side is connected to the second side of the second positioning member 2. The other side of the second clamping plate 41 is provided with a U-shaped groove for accommodating the mounting screws in the volute housing.

[0071] Combination Figure 7In this embodiment, to facilitate the insertion of the second positioning member 2, the second limiting structure 4 includes an upper plate and a lower plate located on the plane of the second locking plate 41. The upper plate and the second limiting groove 204 are located on the same side of the second locking plate 41. The width of the upper plate along the extension direction perpendicular to the second limiting groove 204 is ( Figure 7 L1 in the middle is greater than the width of the lower plate along the extension direction perpendicular to the second limiting groove 204. Figure 7 L2 in the middle.

[0072] In addition, in order to reduce the weight of the second positioning member 2 and to facilitate the handling of the second positioning member 2, the side of the second positioning member 2 away from the second limiting groove 204 has a rectangular through hole 205.

[0073] In this embodiment, for ease of processing, the first positioning member 1 and the first limiting structure 3 are an integral structure, and the second positioning member 2 and the second limiting structure 4 are an integral structural member, both of which are aluminum structural members.

[0074] The following is a brief introduction to the usage process of the positioning and assembly device provided in the embodiments of this disclosure:

[0075] Figure 10 This is a schematic diagram illustrating the assembly process of the motor and impeller, combined with... Figure 10 First, the motor 100 and impeller 300 are placed in the mounting area inside the volute housing. Then, the first positioning member 1 is clamped between the end face of the turbine facing the motor and the volute housing, and the second positioning member 2 is clamped between the other end of the impeller and the volute housing, so that the output shaft of the motor is located in the first limiting groove 101, and the flat surface of the output shaft contacts the groove wall of the first limiting groove 101 of the first positioning member 1 (see...). Figure 11 The output shaft is located within the end face of the impeller. Then, the position of the impeller 300 is adjusted so that both ends of the impeller contact the first abutment plane 102 and the second abutment plane 202, respectively.

[0076] Next, rotate the impeller so that the axial direction of the mounting screw hole (not shown in the figure) on the fastening end face of the impeller 300 is exactly the same as the extension direction of the first limiting groove 101, and then control the screw to be screwed into the output shaft of the motor. Finally, remove the first positioning member 1 and the second positioning member 2.

[0077] The above are merely optional embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure.

Claims

1. An apparatus for assembling an electric machine and an impeller, characterized in that, The device for assembling the motor and impeller includes a first positioning component (1) and a second positioning component (2). The first positioning member (1) has a first limiting groove (101) for accommodating the flat end of the output shaft of the motor, a first abutting plane (102) for abutting against one end of the impeller, and a first side surface (103) for being arranged opposite to one side of the motor. The first abutting plane (102) and the first side surface (103) are arranged opposite to each other. The first limiting groove (101) extends from the side wall of the first positioning member (1) toward the middle of the first positioning member (1). The side wall is located between the first abutting plane (102) and the first side surface (103). The first limiting groove (101) penetrates the first abutting plane (102) and the first side surface (103). The first limiting groove (101) has two limiting surfaces that are clearance-fitted with the two outer circular surfaces of the flat end of the output shaft. The two limiting surfaces are the two opposite groove walls of the first limiting groove (101). The extending direction of the first limiting groove (101) is perpendicular to the flat surface of the flat end of the output shaft. The second positioning member (2) has a second abutting plane (202) for abutting against the other end of the impeller and a second side surface (203) for being arranged opposite to the volute, the second abutting plane (202) being parallel to the first abutting plane (102).

2. The apparatus for assembling an electric machine and an impeller according to claim 1, characterized in that, The first positioning member (1) is a plate-shaped structural member, the first abutting plane (102) is a plate surface of the first positioning member (1) facing the second positioning member (2), and the first side surface (103) is a plate surface of the first positioning member (1) away from the second positioning member (2); The second positioning member (2) is a plate-shaped structural member, the second abutting plane (202) is a plate surface of the second positioning member (2) facing the first positioning member (1), and the second side surface (203) is a plate surface of the second positioning member (2) away from the first positioning member (1); The first positioning member (1) and the second positioning member (2) have the same thickness in the direction perpendicular to the first abutting plane (102).

3. The apparatus for assembling an electric machine and an impeller according to claim 2, characterized in that, The side wall where the first limiting groove (101) is located is a plane for contacting the bottom wall of the vortex shell.

4. The apparatus for assembling an electric machine and an impeller according to claim 3, characterized in that, The device for assembling the motor and impeller further includes a first limiting structure (3), which is located on the first side (103). The first limiting structure (3) is connected to the first positioning member (1) and defines a space for accommodating a portion of the vortex shell structure with the first positioning member (1). The first limiting structure (3) includes two first clamping plates (31), which are located on opposite sides of the first limiting groove (101) and on the same plane. The plane on which the two first clamping plates (31) are located is perpendicular to the first abutting plane (102).

5. The apparatus for assembling an electric machine and an impeller according to claim 4, characterized in that, The outer peripheral wall of the first positioning member (1) includes a first arc surface (111), two second arc surfaces (112), and a middle plane (113). The two ends of the first arc surface (111) are respectively connected to one end of the two second arc surfaces (112), and the other ends of the two second arc surfaces (112) are respectively connected to the two ends of the intermediate plane (113); The first arc surface (111) is located on one side of the plane where the first card plate (31) is located, and the two second arc surfaces (112) and the intermediate plane (113) are located on the other side of the plane where the first card plate (31) is located. The radius of the first arc surface (111) is greater than the radius of the second arc surface (112).

6. The apparatus for assembling an electric machine and an impeller according to claim 4, characterized in that, The bottom (1011) of the first limiting groove (101) is located on the same plane as the first card plate (31).

7. The apparatus for assembling an electric machine and an impeller according to claim 5, characterized in that, The first arc surface (111) protrudes outward along the direction away from the first limiting groove (101) to form an extension (13), and the extension (13) is located on the same plane as the first positioning member (1).

8. A device for assembling an electric machine and an impeller according to any one of claims 1-7, characterized in that, The second positioning member (2) has a second limiting groove (204) for accommodating the shaft end of the impeller. The second limiting groove (204) extends from the side wall of the second positioning member (2) toward the middle of the second positioning member (2). The extension direction of the second limiting groove (204) is the same as the extension direction of the first limiting groove (101). The second limiting groove (204) penetrates the second abutting plane (202) and the second side surface (203). The side wall where the second limiting groove (204) is located is a plane for contacting the bottom wall of the vortex shell.

9. The apparatus for assembling an electric machine and an impeller according to claim 8, characterized in that, The device for assembling the motor and impeller further includes a second limiting structure (4), which is located on the second side (203). The second limiting structure (4) is connected to the second positioning member (2) and defines a space for accommodating a portion of the vortex shell structure with the second positioning member (2). The second limiting structure (4) includes two second locking plates (41), which are located on opposite sides of the second limiting groove (204) and on the same plane. The plane on which the two second locking plates (41) are located is perpendicular to the second abutting plane (202).

10. The apparatus for assembling an electric machine and an impeller according to claim 9, characterized in that, The second limiting structure (4) includes an upper plate and a lower plate located on the plane of the second card plate (41). The upper plate and the second limiting groove (204) are located on the same side of the second card plate (41). The width of the upper plate along the extension direction perpendicular to the second limiting groove (204) is greater than the width of the lower plate along the extension direction perpendicular to the second limiting groove (204).

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