Shell stator assembly detection device and detection method

Abstract

The invention provides a shell stator assembly detection device and a detection method. The shell stator assembly comprises a shell and a stator which are in interference fit. The shell stator assembly detection device comprises a rack, a rotating assembly and a driving assembly. The rack comprises a first support, and the first support is used for fixing the shell stator assembly; the rotating assembly is used for being inserted into the stator and matched with the stator in a rotation stopping mode. The driving assembly is connected with the rotating assembly and used for applying preset torque to the rotating assembly. According to the shell stator assembly detection device and the detection method provided by the invention, whether the magnitude of interference of the shell stator assembly is reasonable or not can be accurately detected.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and particularly relates to a detection device for a housing-stator assembly and a detection method for the interference fit of the housing-stator assembly. Background Art

[0002] In the related art, a motor includes a stator, a rotor, and a housing. The stator is assembled into the housing through a hot sleeve process, and the outer diameter of the stator is in interference fit with the inner diameter of the housing. The design of this interference directly affects the frictional force between the housing and the stator of the motor, thereby affecting whether relative rotation occurs between the housing and the stator during the operation of the motor, which is an important factor affecting the reliability of the motor. How to detect whether the interference amount is reasonable is an urgent problem to be solved. Summary of the Invention

[0003] One of the purposes of the present invention is to provide a detection device for a housing-stator assembly to solve the problem of detecting whether the interference amount of the housing-stator assembly is reasonable; the second purpose is to provide a detection method for the interference fit of the housing-stator assembly.

[0004] In order to achieve the above purposes, the technical solutions adopted by the present invention are as follows:

[0005] A detection device for a housing-stator assembly, the housing-stator assembly includes a housing and a stator in interference fit, characterized in that the detection device includes:

[0006] A frame, including a first support, the first support is used to fix the housing-stator assembly;

[0007] A rotating assembly, which is used to insert into the interior of the stator and is in non-rotating fit with the stator;

[0008] A driving assembly, connected to the rotating assembly, the driving assembly is used to apply a preset torque to the rotating assembly.

[0009] According to the above technical means, it is possible to detect whether the interference amount of the housing-stator assembly is reasonable. The method of the driving assembly applying torque to the rotating assembly can omit manual operation, reduce the labor burden, and for embodiments with a relatively large preset torque, it is easier and safer for the driving assembly to apply this torque than manual operation.

[0010] In some embodiments, the driving assembly includes a driving motor, the driving motor is arranged on the frame, and the power output shaft of the driving motor is connected to the rotating assembly.

[0011] According to the above technical means, the driving motor has the advantages of convenient operation, time-saving and labor-saving.

[0012] In some embodiments, the power output shaft can rotate alternately in a first direction and a second direction to drive the rotary assembly to rotate alternately in the first direction and the second direction, wherein the first direction and the second direction are opposite to each other.

[0013] According to the above technical means, torques in different directions can be frequently applied to the housing stator assembly, so as to be closer to the torque action condition of the stator under actual working conditions, detect the durability of the housing stator assembly, more comprehensively detect the interference amount of the housing stator assembly, and further improve the accuracy of the results of the detection device.

[0014] In some embodiments, at least one rib is formed on the circumferential outer surface of the rotary assembly, and the rib is used to extend into the tooth groove of the stator so that the rotary assembly and the stator form a non-rotating fit.

[0015] According to the above technical means, the rib of the rotary assembly utilizes the existing structure of the stator to realize the non-rotating fit between the rotary assembly and the stator. On the one hand, it is convenient and fast without additional auxiliary structures. On the other hand, it is closer to the effect of the magnetic pulling force on the stator under actual working conditions, and the preset torque size reflects the interference amount more accurately.

[0016] In some embodiments, the number of the ribs is multiple, and the number of the ribs has a one-to-one mapping relationship with the number of the tooth grooves of the stator, and each rib is used to extend into the corresponding tooth groove.

[0017] According to the above technical means, the torque action effects on various parts of the stator are relatively uniform, and it is further closer to the actual working conditions.

[0018] In some embodiments, the rotary assembly includes a mating portion and a rotating shaft portion, the mating portion is sleeved on the outer circumference of the rotating shaft portion, and the mating portion and the rotating shaft portion are relatively fixed, and the at least one rib is arranged on the circumferential outer surface of the mating portion.

[0019] According to the above technical means, the rotary assembly adopts a split structure composed of a mating portion and a rotating shaft portion, which reduces the manufacturing difficulty, improves the versatility of the mating portion and the rotating shaft portion, and is beneficial to cost saving.

[0020] In some embodiments, the detection device includes a box body and a temperature control component, the rotary assembly and the driving assembly are located in the box body, and the temperature control component is used to adjust the temperature in the box body.

[0021] According to the above technical means, during detection, the housing stator assembly is located inside the box body, and the temperature control component is used to make the inside of the box body reach the preset temperature, so that the temperature of the housing stator assembly changes and is closer to the working temperature under the actual working conditions. Since the material undergoes slight deformation when heated, it will affect the interference fit between the stator and the housing in real time. Therefore, during detection, the closer the temperature of the housing stator assembly is to the working temperature under the actual working conditions, the more accurate the detection result is. Correspondingly, the accuracy of the detection device is better.

[0022] In some embodiments, the housing stator assembly includes an end cover, the end cover is located at one axial end of the housing stator assembly, the detection device includes a plurality of first fasteners, and the first support has a plurality of through holes. The plurality of first fasteners respectively pass through the through holes and fix the end cover to the side of the first support close to the stator.

[0023] According to the above technical means, by reusing the end cover of the housing stator assembly in this way, there is no need to set up additional structures to fix the housing stator assembly, which can simplify the structure of the detection device.

[0024] In some embodiments, the housing stator assembly includes a bearing and a bearing chamber, the bearing is arranged in the bearing chamber, and one end of the rotating assembly away from the driving assembly is used to support on the inner ring of the bearing.

[0025] According to the above technical means, the bearing plays a role in reducing friction and increasing the smoothness of movement. In this way, the torque applied by the driving assembly to the rotating assembly is reduced and dispersed to frictional consumption, and can effectively act on the housing stator assembly.

[0026] The embodiment of the present application also provides a method for detecting the interference fit of a housing stator assembly. The housing stator assembly includes a housing and a stator with an interference fit, and is characterized in that it includes:

[0027] Fix the housing stator assembly to be detected on the rack;

[0028] Insert the rotating assembly into the inside of the stator and make a non-rotating fit with the stator;

[0029] Control the driving assembly to apply a preset torque to the rotating assembly;

[0030] Obtain the circumferential relative displacement result between the housing and the stator;

[0031] Determine whether the interference fit of the housing stator assembly is qualified according to the circumferential relative displacement result.

[0032] In some embodiments, the driving assembly includes a driving motor, and controlling the driving assembly to apply a preset torque to the rotating assembly includes:

[0033] Control the power output shaft of the drive motor to rotate forward and reverse alternately at a preset frequency, so as to apply a preset torque to the rotating assembly.

[0034] In some embodiments, the detection device includes a box body and a temperature control component. The stator housing assembly is located inside the box body. The detection method further includes: adjusting the temperature inside the box body to reach a preset temperature range.

[0035] Advantages of the present invention:

[0036] It can more accurately detect whether the interference amount of the stator housing assembly is reasonable. The method of applying torque to the rotating assembly by the drive assembly can omit manual operation, reduce the labor burden, and for embodiments with a large preset torque, it is easier and safer to apply this torque by the drive assembly than by manual operation. Description of the drawings

[0037] Figure 1 Schematic diagram of the stator housing assembly located on the detection device in an embodiment of the present application;

[0038] Figure 2 For Figure 1 Cross-sectional view of the rotating assembly and the stator housing assembly in the embodiment;

[0039] Figure 3 For Figure 2 Enlarged schematic diagram at position A in the structure;

[0040] Figure 4 Schematic diagram of the structure of the stator housing assembly;

[0041] Figure 5 Schematic diagram of the structure of the rotating assembly in an embodiment of the present application;

[0042] Figure 6 For Figure 5 Schematic diagram of the structure of the mating part in the embodiment;

[0043] Figure 7 For Figure 6 Enlarged schematic diagram at position B in the structure;

[0044] Figure 8 For Figure 5 Schematic diagram of the structure of the rotating shaft part in the embodiment;

[0045] Figure 9 Schematic diagram of the end cover of the stator housing assembly;

[0046] Figure 10 For Figure 9 Schematic diagram of the structure from another perspective;

[0047] Figure 11 For Figure 10Enlarged schematic view of the middle structure at C;

[0048] Figure 12 is Figure 1 Schematic diagram of the structure of the first support 11 in the embodiment;

[0049] Figure 13 Schematic flow chart of the detection method in an embodiment of the present application;

[0050] Figure 14 Schematic flow chart of the detection method in another embodiment of the present application.

[0051] Explanation of reference numerals

[0052] 100, detection device; 200, stator assembly; 210, stator; 210a, tooth slot; 220, housing; 230, end cover; 240, bearing; 250a, bearing chamber; 10, frame; 11, first support; 11a, through hole; 11b, via hole; 12, second support; 20, rotating assembly; 21, rotating shaft part; 22, fitting part; 221, rib; 30, driving assembly; 31, driving motor; 40, first fastener; 50, box body. Detailed implementation manners

[0053] The following will describe the implementation manners of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for explaining the present invention, rather than for limiting the protection scope of the present invention.

[0054] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0055] The embodiment of the present application provides a detection device for a shell stator assembly. The shell stator assembly is a component of a motor. Please refer to Figure 4, the housing stator assembly 200 includes a housing 220 and a stator 210. The stator 210 is in interference fit with the housing 220. Specifically, within the interference fit tolerance zone, the inner diameter tolerance zone of the housing 220 is below the outer diameter tolerance zone of the stator 210. The stator 210 can also be referred to as a stator assembly, and the stator assembly is provided with structures such as a stator winding and a terminal. During the production process, the stator 210 and the housing 220 are often assembled using a hot shrink fitting process, that is, the stator 210 is placed into the heated housing, and after the housing 220 cools down, the designed interference amount is used to ensure that the stator 210 does not run out of position. The materials of the housing 220 and the stator 210 are different, and the expansion coefficients of the two materials are different. At different ambient temperatures and operating temperatures, the interference amount will change.

[0056] If the designed interference amount between the housing 220 and the stator 210 is unreasonable, during the operation of the motor, when the magnetic pulling force received by the stator 210 is greater than the frictional force between the stator 210 and the housing 220, it will cause the stator 210 to run out of position. At this time, the three-phase leads of the motor may be pulled off, or the insulation between the stator windings may be broken, resulting in motor leakage and easily forming a serious safety hazard. Therefore, the detection device 100 of the embodiment of the present application is used to detect whether the interference fit of the housing stator assembly 200 is qualified.

[0057] Please refer to Figure 1 , Figure 2 and Figure 3 , the detection device 100 includes a frame 10, a rotating assembly 20, and a driving assembly 30. As Figure 1 shown, the frame 10 includes a first support 11, and the first support 11 is used to fix the housing stator assembly 100. As Figure 2 and Figure 3 shown, the rotating assembly 20 is used to insert into the interior of the stator 210 and is in non-rotating fit with the stator 210. The above non-rotating fit means a fit that prevents relative rotation between the rotating assembly 20 and the stator 210, and the two hinder each other's rotation. The driving assembly 30 is connected to the rotating assembly 20, and the driving assembly 30 is used to apply a preset torque to the rotating assembly 20. It can be understood that the direction of this torque is along the axis direction of the housing stator assembly 200, and this axis direction is also the central axis direction of the housing stator assembly 200. After the rotating assembly 20 is subjected to the torque, the force is transmitted to the stator 210 that is in non-rotating fit with the rotating assembly 20, and the resulting effect can be used to simulate the influence of the magnetic pulling force received by the stator 210 under the working conditions of the motor.

[0058] The so-called preset torque refers to the maximum value within the allowable torque range that the stator-housing assembly 200 can withstand under the condition that the stator 210 and the housing 220 will not be forced to rotate relative to each other circumferentially during the design stage of the motor, in order to enable the motor to have higher reliability. For example, if the design torque is T1 and the allowable coefficient (or safety factor) is a, the preset torque T = T1 * a, and the value of a can be 1.2 to 2, including but not limited to 1.2, 1.3, 1.4, 1.8, 2, etc. It should be noted that this allowable torque range is not constant but can be adjusted according to design requirements. After the stator-housing assembly 200 is subjected to this torque, if there is no circumferential relative rotation between the stator 210 and the housing 220, then the torque range that the stator-housing assembly 200 can withstand meets the design requirements, and the interference amount between the stator 210 and the housing 220 is qualified. On the contrary, if there is circumferential relative rotation between the stator 210 and the housing 220, then the torque range that the stator-housing assembly 200 can withstand does not meet the design requirements, and the interference amount between the stator 210 and the housing 220 is unqualified.

[0059] The method of the drive assembly 30 applying torque to the rotating assembly 20 can omit manual operation, reducing the labor burden. For embodiments with a relatively large preset torque, it is easier and safer for the drive assembly 30 to apply this torque than manual operation. The specific method of the drive assembly 30 applying torque to the rotating assembly 20 is not limited. For example, the drive assembly 30 can be an electric torque wrench or the like.

[0060] In some other embodiments, please refer to Figure 1 , the drive assembly 30 includes a drive motor 31. The drive motor 31 is disposed on the frame 10, and the power output shaft of the drive motor 31 is connected to the rotating assembly 20. The form of the drive motor 31 is not limited and can be an AC motor or a DC motor, etc. The drive motor 31 can be fixed to the frame 10 by bolting or other means. The power output shaft of the drive motor 31 rotates under the action of electromagnetic force, generating torque on the rotating assembly 20.

[0061] In this embodiment, the drive motor 31 has the advantages of convenient operation, time-saving and labor-saving. The reaction force exerted by the rotating assembly 20 on the drive motor 31 can be dispersed to the frame 10, making it not easy to shake and reducing the impact on the accuracy of the detection device 100. The drive motor 31 is also easy to control. By means of regulation such as given voltage or current, the magnitude of the torque it outputs can be controlled, so as to output the preset torque more accurately.

[0062] Exemplarily, the power output shaft of the drive motor 31 is connected to the rotating assembly 20 through a coupling.

[0063] Exemplarily, the power output shaft of the drive motor 31 has internal splines, and the rotating assembly 20 has external splines that cooperate with the internal splines. The connection between the drive motor 31 and the power output shaft 20 is a spline connection, and such a connection method is easy to disassemble and assemble.

[0064] Exemplarily, please refer to Figure 1 , the frame 10 includes a second support 12. The first support 11 and the second support 12 are spaced apart along the rotation axis direction of the rotating assembly 20. The drive motor 31 is disposed on the second support 12. The power output shaft of the drive motor 31 extends out of the side of the second support 12 close to the first support 11 and is connected to the rotating assembly 20. In one embodiment, the spacing distance between the first support 11 and the second support 12 can be adjusted, and the adjustment methods include but are not limited to the slide rail type, multi-position fixed type, etc. For example, in the slide rail type embodiment, the first support 11 is supported on the slide rail and can move along the rotation axis direction of the rotating assembly 20 on the slide rail. This facilitates the quick alignment and connection of the power output shaft of the drive motor 31 on the second support 12 with the rotating assembly 20 after the stator housing assembly 200 and the rotating assembly 20 are fixed. After the drive motor 31 is connected or pre-connected to the rotating assembly 20, the second support 12 is fixed to the frame 10.

[0065] Exemplarily, please refer to Figure 1 , the first support 11 and the second support 12 are arranged at intervals in the horizontal direction, the rotation axis of the rotating assembly 20 is horizontally arranged, and the stator housing assembly 200 is horizontally installed on the first support 11. In this way, the torque range that can be borne between the stator 210 and the housing 220 is less affected by gravity, and the accuracy of the detection device 100 is better.

[0066] In some embodiments, please refer to Figure 2 and Figure 3 , the power output shaft can rotate alternately in the first direction and the second direction to drive the rotating assembly 20 to rotate alternately in the first direction and the second direction, where the first direction and the second direction are opposite. That is to say, the power output shaft of the drive motor 31 can rotate forward and backward alternately, and the alternating frequency is not limited. It can be understood that the torque applied by the drive motor 31 to the rotating assembly 20 also changes direction alternately. Exemplarily, when rotating forward, the torque direction is towards the first end of the rotation axis, and when rotating backward, the torque direction is towards the second end of the rotation axis opposite to the first end.

[0067] In this embodiment, thanks to the form of the driving component 30 being a driving motor 31, torques in different directions can be frequently applied to the housing stator assembly 200, so as to be closer to the torque action condition of the stator 210 under actual working conditions, detect the durability of the housing stator assembly 200, make the interference amount detection of the housing stator assembly 200 more comprehensive, and further improve the result accuracy of the detection device 100. The above-mentioned durability means that in order to make the motor have high reliability, the maximum value of the number of times of positive and negative torque reversals that the housing stator assembly 200 can withstand under the condition that the stator 210 and the housing 220 will not be forced to rotate circumferentially relative to each other. For example, the maximum value F of the number of times of positive and negative torque reversals should be greater than 10,000 times.

[0068] It can be understood that when the alternating frequency is relatively fast, the durability detection completion time is shorter and the efficiency of the detection device 100 is higher.

[0069] In some embodiments, please refer to Figure 5 、 Figure 6 and Figure 7 , at least one rib 221 is formed on the outer circumferential surface of the rotating component 20. The number of ribs 221 can be one, two or more. The rib 221 is used to extend into the tooth groove 210a of the stator 210 so that the rotating component 20 and the stator 210 form a non-rotating fit. The tooth groove 210a of the stator 210 is used to arrange the stator winding, and the number of tooth grooves 210a is related to the design parameters of the motor. In this embodiment, the rib 221 of the rotating component 20 utilizes the existing structure of the stator 210 to realize the non-rotating fit between the rotating component 20 and the stator 210. On the one hand, it is convenient and fast without additional auxiliary structures. On the other hand, it is closer to the effect of the magnetic pulling force on the stator 210 under actual working conditions, and the preset torque size reflects the interference amount more accurately.

[0070] Exemplarily, the rib 221 extends along the rotation axis direction of the rotating component 20, which is convenient for assembling with the tooth groove 210a.

[0071] Exemplarily, the number of ribs 221 is multiple, and the multiple ribs 221 are evenly spaced along the outer circumferential surface of the rotating component 20. That is to say, the circumferential spacing distance (i.e., arc length) between any two adjacent ribs 221 is equal. In this way, the torque action effects on each part of the stator 210 are relatively uniform and closer to the actual working conditions.

[0072] Exemplarily, the number of the ribs 221 is multiple, and there is a one-to-one mapping relationship between the number of the ribs 221 and the number of the stator slots 210a, that is, the number of the ribs 221 is the same as the number of the stator slots 210a of the stator 210. Each rib 221 is configured to extend into a corresponding slot 210a, and one rib 221 is distributed in each slot 210a. In this embodiment, the torque acting effects on various parts of the stator 210 are relatively uniform, and further closer to the actual working conditions.

[0073] In some embodiments, please refer to Figure 5 、 Figure 6 and Figure 8 , the rotating assembly 20 includes a mating portion 22 and a rotating shaft portion 21. The mating portion 22 is sleeved on the outer periphery of the rotating shaft portion 21, and the mating portion 22 is relatively fixed to the rotating shaft portion 21. At least one rib 221 is disposed on the circumferential outer surface of the mating portion 22. The implementation manner of the relative fixation between the mating portion 22 and the rotating shaft portion 21 is not limited. For example, the mating portion 22 and the rotating shaft portion 21 are connected by a key, or for another example, the mating portion 22 is shrink-fitted on the rotating shaft portion 21. The specific method is to place the mating portion 22 in an oven for heating. When the mating portion 22 reaches the set temperature, it is sleeved on the rotating shaft portion 21. After the mating portion 22 is installed in place, it is necessary to wait for the rotating assembly 20 to cool down.

[0074] In this embodiment, the rotating assembly 20 adopts a split structure composed of the mating portion 22 and the rotating shaft portion 21, which reduces the manufacturing difficulty, improves the versatility of the mating portion 22 and the rotating shaft portion 21, and is beneficial to cost saving.

[0075] Certainly, in some other embodiments, the rotating assembly 20 may be an integrally formed structure.

[0076] In some embodiments, please refer to Figure 1 , the detection device 100 includes a box body 50 and a temperature control component (not shown in the figure). The rotating assembly 20 and the driving assembly 30 are located in the box body 50, and the temperature control component is used to adjust the temperature in the box body 50. The temperature control component includes a heating element and a control element for controlling the heating element. The control element makes the heating element work and generate heat until the temperature in the box body 50 reaches a preset range. The forms of the heating element include resistance wires or graphite heating rods, etc. The control element may be a Programmable Logic Controller (PLC) or a single-chip microcomputer, etc.

[0077] It can be understood that during detection, the housing stator assembly 200 is located inside the box body 50. The temperature control component is used to make the inside of the box body 50 reach a preset temperature, so that the temperature of the housing stator assembly 200 changes, making it closer to the operating temperature under actual working conditions. Since the material undergoes slight deformation when heated, it will affect the interference fit between the stator 210 and the housing 220 in real time. Therefore, during detection, the closer the temperature of the housing stator assembly 200 is to the operating temperature under actual working conditions, the more accurate the detection result is. Correspondingly, the detection device 100 has better accuracy.

[0078] In some embodiments, please refer to Figures 9 to 11 , the housing stator assembly 200 includes an end cover 230, and the end cover 230 is located at one axial end of the housing stator assembly 200. In the motor composed of the housing stator assembly 200, the end cover 230 and the housing 220 jointly cover structures inside the motor such as the stator 210 or the rotor. Exemplarily, please refer to Figure 4 , a plurality of protruding mounting posts are provided on the circumferential side surface of the housing 220, and the housing 220 is assembled with the end cover 230 through the mounting posts and bolts.

[0079] Please refer to Figure 12 , the detection device 100 includes a plurality of first fasteners 40. The first support 11 has a plurality of through holes 11a, and the plurality of first fasteners 40 respectively pass through the through holes 11a to fix the end cover 230 to the side of the first support 11 close to the stator 210, thereby fixing the housing stator assembly 200 to the first support 11. In this way, by reusing the end cover 230 of the housing stator assembly 200, there is no need to set up additional structures to fix the housing stator assembly 200, which can simplify the structure of the detection device 100.

[0080] Exemplarily, the first support 11 has a plurality of through holes 11b for avoiding the bolts connecting the housing 220 and the end cover 230.

[0081] Of course, in other embodiments, the housing stator assembly 200 can also be fixed by other structural forms. For example, the detection device 100 includes an end cover member. One side of the end cover member is assembled with the housing 220, and the opposite side is assembled with the first support 11. That is to say, the end cover member is not a part of the housing stator assembly 200, but is used as a part of the detection device 100 to fix the housing stator assembly 200.

[0082] In some embodiments, please refer to Figure 1 and Figure 9 , the housing stator assembly 200 includes a bearing 240 and a bearing chamber 250a, and the bearing 240 is arranged in the bearing chamber 250a. It can be understood that the outer ring of the bearing 240 can be in interference fit with the circumferential inner wall of the bearing chamber 250a, so that the bearing 240 is assembled in the bearing chamber 250a. Exemplarily, the bearing chamber 250a is opened in the middle of the end cover 230.

[0083] One end of the rotating assembly 20 away from the driving assembly 30 is used to support the inner ring of the bearing 240. The bearing 240 functions to reduce friction and increase the smoothness of movement. In this way, the torque applied by the driving assembly 30 to the rotating assembly 20 is less dispersed to frictional consumption and can effectively act on the housing stator assembly 200.

[0084] The form of the bearing 240 is not limited, including but not limited to roller bearings, rolling element bearings, etc.

[0085] It can be understood that in some embodiments where the rotating assembly 20 includes a rotating shaft portion 21 and a mating portion 22, one axial end of the rotating shaft portion 21 is supported by the bearing 240, and the other axial end is connected to the power output shaft of the driving motor 31.

[0086] The embodiment of the present application also provides a method for detecting the interference fit of the housing stator assembly 200, and this detection method can also be applied to the detection device mentioned in any of the above embodiments.

[0087] Please refer to Figure 4 , the housing stator assembly 200 includes a housing 220 and a stator 210 with an interference fit. For the relevant description of the housing stator assembly 200, please refer to the foregoing content and will not be elaborated here. As Figure 13 shown, the detection method includes the following steps.

[0088] S1. Fix the housing stator assembly 200 to be detected on the frame 10. For example, it is fixed by assembling the end cover 230 of the housing stator assembly 200 with the first support 11 of the frame 10.

[0089] S2. Insert the rotating assembly 20 into the inside of the stator 210 and make a non-rotating fit with the stator 210. For example, insert the ribs 221 formed on the circumferential outer surface of the rotating assembly 20 into the tooth grooves 210a of the stator 210 one by one.

[0090] S3. Control the driving assembly 30 to apply a preset torque to the rotating assembly 20. For example, start the driving motor 31 to apply a preset torque.

[0091] S4. Obtain the circumferential relative displacement result between the housing 220 and the stator 210. For example, a straight line drawn in advance on the surfaces of the stator 210 and the housing 220 can be observed to see if there is a phenomenon of disconnection or misalignment.

[0092] S5. Determine whether the interference fit of the housing stator assembly 200 is qualified according to the circumferential relative displacement result.

[0093] Specifically, if circumferential relative displacement occurs between the housing and the stator, it is determined that the interference fit of the housing stator assembly is unqualified.

[0094] If there is no circumferential relative displacement between the housing and the stator, it is determined that the interference fit of the housing-stator assembly is qualified.

[0095] It should be noted that the way to obtain the result of the circumferential relative displacement between the housing 220 and the stator 210 can be that the operator visually observes during the detection process to directly obtain the result of the circumferential relative displacement. It can also be obtained through a sensor.

[0096] The detection method provided by the embodiment of the present application can more conveniently detect the interference amount of the housing-stator assembly 200, without too much manual operation, and is simple and fast.

[0097] In some embodiments, S3, controlling the driving component to apply a preset torque to the rotating component, includes: S31, controlling the driving component to rotate forward and reverse alternately at a preset frequency to apply a preset torque to the rotating component. Periodically applying torques in opposite directions to the housing-stator assembly 200, so as to more closely approximate the torque acting conditions of the stator 210 under actual working conditions, and detecting the durability of the housing-stator assembly 200.

[0098] In some embodiments, please refer to Figure 1 , the detection device includes a box body 50 and a temperature control component (not shown in the figure), and the housing-stator assembly 200 is located inside the box body 50. As Figure 14 shown, the detection method further includes: S6, adjusting the temperature inside the box body to reach a preset temperature range.

[0099] The temperature control component is used to adjust the temperature inside the box body 50. During detection, the housing-stator assembly 200 is located inside the box body 50, and the temperature control component is used to make the inside of the box body 50 reach a preset temperature, so that the temperature of the housing-stator assembly 200 changes and is closer to the working temperature under actual working conditions. S6, adjusting the temperature inside the box body to reach a preset temperature range can be performed before S3, controlling the driving component 30 to apply a preset torque to the rotating component 20.

[0100] The above embodiments are only preferred embodiments given to fully illustrate the present invention, and the protection scope of the present invention is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art on the basis of the present invention are all within the protection scope of the present invention.

Claims

1. A shell stator assembly detection device, the shell stator assembly comprising a housing and a stator with an interference fit, characterized in that, The detection device includes: A frame including a first support for fixing the housing stator assembly. A rotating assembly for inserting into the interior of the stator and having anti-rotation cooperation with the stator. A driving assembly connected to the rotating assembly for applying a preset torque to the rotating assembly.

2. The detection device according to claim 1, characterized in that The driving assembly includes a driving motor disposed on the frame, and a power output shaft of the driving motor is connected to the rotating assembly.

3. The detection device according to claim 2, characterized in that The power output shaft can rotate alternately in a first direction and a second direction to drive the rotating assembly to rotate alternately in the first direction and the second direction, where the first direction and the second direction are opposite.

4. The detection device according to claim 1, characterized in that, At least one rib is formed on the outer circumferential surface of the rotating assembly, and the rib is used for extending into the tooth slot of the stator so that the rotating assembly and the stator form an anti-rotation cooperation.

5. The detection device according to claim 4, characterized in that, The number of the ribs is multiple, and the number of the ribs has a one-to-one mapping relationship with the number of the tooth slots of the stator, and each rib is used for extending into the corresponding tooth slot.

6. The detection device according to claim 4, wherein The rotating assembly includes a mating portion and a rotating shaft portion, the mating portion is sleeved on the outer periphery of the rotating shaft portion, and the mating portion is relatively fixed to the rotating shaft portion, and the at least one rib is disposed on the outer circumferential surface of the mating portion.

7. The detection device according to any one of claims 1-6, characterized in that, The detection device includes a box body and a temperature control assembly, the rotating assembly and the driving assembly are located in the box body, and the temperature control assembly is used for adjusting the temperature in the box body.

8. The detection device according to any one of claims 1-6, characterized in that, The housing stator assembly includes an end cover located at one axial end of the housing stator assembly. The detection device includes a plurality of first fasteners. The first support has a plurality of through holes, and the plurality of first fasteners respectively pass through the through holes to fix the end cover to the side of the first support close to the stator.

9. The detection device according to any one of claims 1-6, characterized in that, The housing stator assembly includes a bearing and a bearing chamber, the bearing is disposed in the bearing chamber, and one end of the rotating assembly away from the driving assembly is used for supporting on the inner ring of the bearing.

10. A detection method for the interference fit of a housing-stator assembly, the housing-stator assembly comprising a housing and a stator with an interference fit, characterized in that, Including: Fixing the housing stator assembly to be detected on the frame. Inserting the rotating assembly into the interior of the stator and having anti-rotation cooperation with the stator. Controlling the driving assembly to apply a preset torque to the rotating assembly. Obtaining the circumferential relative displacement result between the housing and the stator. Determining whether the interference fit of the housing stator assembly is qualified according to the circumferential relative displacement result.

11. The detection method according to claim 10, characterized in that, The driving assembly includes a driving motor. Controlling the driving assembly to apply a preset torque to the rotating assembly includes: Controlling the power output shaft of the driving motor to rotate forward and backward alternately at a preset frequency to apply a preset torque to the rotating assembly.

12. The detection method according to claim 10, characterized in that The detection device includes a box body and a temperature control assembly, the housing stator assembly is located in the box body, and the detection method further includes: adjusting the temperature in the box body to reach a preset temperature range.

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