A test device for testing bearingless motors

Abstract

The present invention provides a testing device, comprising a base plate and a pressure plate, wherein the base plate is provided with a bearing portion for bearing a stator assembly and a rotating support body for bearing a rotor assembly; the pressure plate is configured to be slidably installed, and a pressing portion for cooperating with the bearing portion to press the stator assembly is provided on the surface of the pressure plate facing the base plate, and the surface is also provided with a rotation limiting body for cooperating with the rotating support body to press the rotor assembly, and the rotor assembly can rotate freely relative to the rotating support body and the rotation limiting body, which solves the problem in the prior art that during the inspection process of the stator assembly and the rotor assembly without the bearing pressed in, the bearing needs to be installed first, and then the bearing needs to be unloaded after the inspection is completed, resulting in numerous inspection steps and low inspection efficiency, so that the stator assembly and the rotor assembly without the bearing pressed in no longer need to install the bearing or unload the bearing during the inspection process, which greatly improves the inspection efficiency and can realize batch inspection.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, and in particular to a testing device for testing a bearingless motor. Background Art

[0002] Detecting the stator and rotor assemblies in power tools is a top priority in the detection work. Some manufacturers require that the bearings do not need to be pressed in when the power tools leave the factory. As a result, the stator and rotor assemblies are not pressed into the bearings during detection. Therefore, the bearings need to be installed first during detection, and then they need to be unloaded after the detection is completed. Installing and unloading the bearings in this way makes the steps of detecting the stator and rotor assemblies numerous, the detection efficiency is low, and the rotor shaft may be damaged to a certain extent during the process of installing or unloading the bearings. Summary of the invention

[0003] A fixing frame provided by the present invention solves the problem in the prior art that during the inspection process of the stator assembly and the rotor assembly without the bearing pressed in, the bearing needs to be installed first, and then the bearing needs to be unloaded after the inspection is completed, resulting in numerous inspection steps and low inspection efficiency. The stator assembly and the rotor assembly without the bearing pressed in no longer need to install the bearing or unload the bearing during the inspection process, thereby greatly improving the inspection efficiency and enabling batch inspection.

[0004] To achieve the above object, the technical solution of the present invention is specifically implemented as follows:

[0005] The present invention discloses a testing device for testing a bearingless motor, wherein the testing device comprises a base plate and a pressure plate, wherein the base plate is provided with a bearing portion for bearing a stator assembly and a rotating support body for bearing a rotor assembly; the pressure plate is configured to be slidably installed, and a clamping portion for cooperating with the bearing portion to clamp the stator assembly is provided on the surface of the pressure plate facing the base plate, and the surface is also provided with a rotating limit body for cooperating with the rotating support body to clamp the rotor assembly, and the rotor assembly is freely rotatable relative to the rotating support body and the rotating limit body.

[0006] Furthermore, the testing device also includes a top plate, the top plate and the bottom plate are fixedly connected via a plurality of guide columns, and the pressure plate is slidably mounted on the guide columns.

[0007] Furthermore, the testing device also includes a driving device, which is arranged on the top plate and is used to drive the pressing plate to slide.

[0008] Further, the bearing portion is a bearing platform, the pressing portion is a boss, the bearing platform and the boss both have a groove structure, and the groove structures of the bearing platform and the boss cooperate to press and fix the stator assembly.

[0009] Furthermore, the rotation support body includes at least two groups of rotation support components, and the rotation limiting body includes at least two groups of corresponding rotation clamping components. The two groups of rotation support components and the two groups of rotation clamping components are paired and combined to limit the two ends of the rotor shaft.

[0010] Furthermore, the rotation support assembly includes a load-bearing and a support seat, wherein there are at least two load-bearing bearings for rotationally supporting the rotor shaft; the load-bearing bearings are rotatably mounted on the support seat, and the support seat is also provided with an avoidance groove for avoiding the rotor assembly.

[0011] Furthermore, the rotating clamping assembly includes a clamping bearing and a clamping bearing seat, wherein there is at least one clamping bearing, and the clamping bearing and the load-bearing bearing cooperate to limit the rotor shaft; the clamping bearing is rotatably mounted on the clamping bearing seat.

[0012] Further, the testing device further comprises a tightening assembly, the tightening assembly comprising a tightening shaft, a return spring and a driving module, wherein the tightening shaft is configured to be linearly slidably mounted, and a first universal ball is provided on the end surface of the tightening shaft facing the rotor shaft; the tightening shaft is pressed against the first end of the rotor shaft under the action of the return spring; the driving module is used to pull the tightening shaft to move in a direction away from the rotor assembly;

[0013] The tightening shaft is slidably mounted on the shaft seat, a flange is formed on the tightening shaft, the return spring is sleeved on the tightening shaft, the first end of the return spring is tightened against the flange, and the second end of the return spring is pressed against the shaft seat.

[0014] Furthermore, the driving module includes a turntable and a driving rod, wherein the turntable is configured to be rotatably mounted; the first end of the driving rod is hinged to the turntable, and the second end of the driving rod is hinged to the tightening shaft.

[0015] Furthermore, the clamping assembly also includes a limiting shaft, which is used to limit the second end of the rotor shaft. The limiting shaft is fixed on a support seat, and a second universal ball is provided on the end surface of the limiting shaft facing the rotor shaft.

[0016] Beneficial technical effects:

[0017] 1. The present invention discloses a testing device for testing a bearingless motor, comprising a base plate and a pressure plate, wherein the base plate is provided with a bearing portion for bearing a stator assembly and a rotating support body for bearing a rotor assembly; the pressure plate is configured to be slidably mounted, and a pressing portion for cooperating with the bearing portion to press the stator assembly is provided on the surface of the pressure plate facing the base plate, and the surface is also provided with a rotation limiting body for cooperating with the rotating support body to press the rotor assembly, and the rotor assembly is freely rotated relative to the rotating support body and the rotation limiting body, which solves the problem in the prior art that the stator assembly and the rotor assembly without the bearing pressed into the testing process need to install the bearing first, and then unload the bearing after the testing is completed, resulting in numerous testing steps and low testing efficiency, so that the stator assembly and the rotor assembly without the bearing pressed into the testing process no longer need to install the bearing or unload the bearing, which greatly improves the testing efficiency and can realize batch testing;

[0018] 2. In the present invention, the rotation support assembly includes a load-bearing bearing and a support seat, wherein there are at least two load-bearing bearings for rotationally supporting the rotor shaft; the load-bearing bearing is rotationally mounted on the support seat; the rotation limiting assembly includes a clamping bearing and a clamping bearing seat, wherein there is at least one clamping bearing, and the clamping bearing and the load-bearing bearing cooperate to limit the rotor shaft; the clamping bearing is rotationally mounted on the clamping bearing seat to clamp the rotor shaft and ensure the effective rotation of the rotor shaft;

[0019] 3. In the present invention, the tightening shaft is slidably mounted on the shaft seat, a flange is formed on the tightening shaft, the return spring is sleeved on the tightening shaft, the first end of the return spring is tightened against the flange, and the second end of the return spring is pressed against the shaft seat; further, a first universal ball is provided on the end surface of the tightening shaft facing the rotor shaft; the tightening assembly also includes a limiting shaft, the limiting shaft is used to limit the second end of the rotor shaft, the limiting shaft is fixed on the support seat, and a second universal ball is provided on the end surface of the limiting shaft facing the rotor shaft, and both ends of the rotor shaft are pressed against the universal ball, thereby ensuring that the rotor shaft does not displace during rotation;

[0020] 4. In the present invention, the testing device also includes a tightening assembly, which includes a tightening shaft, a reset spring and a driving module, wherein the tightening shaft is configured to be linearly slidably installed; the tightening shaft is pressed against the first end of the rotor shaft under the action of the reset spring; the driving module is used to pull the tightening shaft to move in a direction away from the rotor assembly, and the distance between the universal ball and the rotor shaft can be adjusted, so that the stator and rotor assembly can be easily placed in or taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for describing the embodiments are briefly introduced below.

[0022] Figure 1 A specific structural diagram of a testing device for testing a bearingless motor according to the present invention;

[0023] Figure 2 It is the front view of the rotor assembly;

[0024] Figure 3 This is the main view of the stator assembly;

[0025] Figure 4 A front view of the rotor assembly and the stator assembly being assembled together;

[0026] Figure 5 A top view of a pressure plate in a testing device for testing a bearingless motor according to the present invention;

[0027] Figure 6 A front view of a pressure plate in a testing device for testing a bearingless motor according to the present invention;

[0028] Figure 7 A structural diagram for placing the assembled stator assembly and rotor assembly on a test device;

[0029] Figure 8 Another structural diagram of placing the assembled stator assembly and rotor assembly on a test device;

[0030] Fig. 9 This is a structural diagram of a stator assembly and a rotor assembly assembled together after being fixed using the testing device for testing a bearingless motor according to the present invention;

[0031] Fig.10 A cross-sectional view of the rotor assembly being fixed;

[0032] Fig.11 A cross-sectional view of the stator assembly being fixed;

[0033] Fig.12 This is the structural diagram of the universal ball.

[0034] Among them, 1-bottom plate, 11-bearing part, 12-rotating support body, 1211-bearing bearing, 1212-support seat, 2-pressure plate, 21-pressing part, 22-rotating limiting body, 2211-pressing bearing, 2212-pressing bearing seat, 3-top plate, 4-guide column, 5-driving device, 6-pressing assembly, 61-pressing shaft, 62-reset spring, 63-driving module, 631-turntable, 632-driving rod, 64-limiting shaft, 611-first universal ball, 612-flange, 641-second universal ball, 65-axle seat, a-stator assembly, b-rotor assembly, c-rotor shaft, c1-first bearing position, c2-second bearing position. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] The present invention discloses a testing device for testing a bearingless motor, see Figure 1 , Figure 7 , Figure 8 and Fig. 9 , including a base plate 1 and a pressure plate 2, wherein the base plate 1 is provided with a bearing portion 11 for bearing a stator assembly a and a rotating support body 12 for bearing a rotor assembly b; the pressure plate 2 is configured to be slidably installed, and a pressing portion 21 for cooperating with the bearing portion 11 to press the stator assembly a is provided on the surface of the pressure plate 2 facing the base plate 1, and the surface is also provided with a rotation limiting body 22 for cooperating with the rotating support body 12 to press the rotor assembly, and the rotor assembly b can rotate freely relative to the rotating support body 12 and the rotation limiting body 22, so that the stator assembly and the rotor assembly without bearings pressed in no longer need to install bearings or unload bearings during the detection process, which greatly improves the detection efficiency and can realize batch detection.

[0039] As an embodiment of the present invention, specifically, the bearing part 11 is a bearing platform, the pressing part 21 is a boss, the bearing platform and the boss both have a groove structure, and the groove structures of the bearing platform and the boss cooperate to press and fix the stator assembly; the rotating support body 12 includes at least two groups of rotating support assemblies, and the rotating limiting body 22 includes at least two groups of rotating pressing assemblies corresponding thereto, and the two groups of rotating support assemblies and the two groups of rotating pressing assemblies are paired and combined to limit the two ends of the rotor shaft. Preferably, the rotating support assembly includes a bearing bearing 1211 and a support seat 1212, and there are at least two bearing bearings 1211 for rotating The rotor shaft is dynamically supported, and a load-bearing bearing 1211 is rotatably installed on the support seat 1212. The support seat 1212 is also provided with an avoidance groove for avoiding the rotor component b; the rotation limiting component includes a clamping bearing 2211 and a clamping bearing seat 2212, and there is at least one clamping bearing 2211. The clamping bearing 2211 and the load-bearing bearing 1211 cooperate to limit the rotor shaft; the clamping bearing 2211 is rotatably installed on the clamping bearing seat 2212. Preferably, there are two load-bearing bearings 1211, which are fixedly installed on both sides of the avoidance groove, and there is one clamping bearing 2211, so as to ensure that the cross-sectional view after clamping is as shown in FIG. Fig.10 As shown, it is ensured that the two load-bearing bearings and one pressing bearing are tangent to the bearing position of the rotor shaft c, so as to press the rotor shaft c and ensure the effective rotation of the rotor shaft c.

[0040] As an embodiment of the present invention, the testing device also includes a top plate 3 and a driving device 5. The top plate 3 and the bottom plate 1 are fixedly connected by multiple guide columns 4, and the pressure plate 2 is slidably installed on the guide columns 4; the driving device 5 is arranged on the top plate 3 to drive the pressure plate 2 to slide.

[0041] As an embodiment of the present invention, the test device also includes a tightening assembly 6, which includes a tightening shaft 61, a reset spring 62 and a drive module 63. Specifically, the tightening shaft 61 is configured to be linearly slidably installed; the tightening shaft 61 is pressed against the first end of the rotor shaft c under the action of the reset spring 62; the drive module 63 is used to pull the tightening shaft 61 to move in a direction away from the rotor assembly, and the distance between the universal ball and the rotor shaft can be adjusted, so that the stator and rotor assembly can be easily put in or taken out.

[0042] As a preferred embodiment of the present invention, the driving module 63 includes a turntable 631 and a driving rod 632. Specifically, the turntable 631 is configured to be rotatably installed; the first end of the driving rod 632 is hinged to the turntable 631, and the second end of the driving rod 632 is hinged to the tightening shaft 61; the tightening shaft 61 is slidably installed on the shaft seat 65, and a flange 612 is formed on the tightening shaft 61. The return spring 62 is sleeved on the tightening shaft 61, and the first end of the return spring 62 is tightened against the flange 612, and the second end of the return spring 62 is pressed against the shaft seat 65. A first universal ball 611 is provided on the end surface of the tightening shaft 61 facing the rotor shaft c. The tightening assembly 6 also includes a limiting shaft 64, which is used to limit the second end c2 of the rotor shaft. The limiting shaft 64 is fixed on the support seat 1212. A second universal ball 641 is provided on the end surface of the limiting shaft 64 facing the rotor shaft c. Of course, the limiting shaft may not be provided here, and the second universal ball 641 may be directly fixedly installed on the support seat 1212. Both ends of the rotor shaft c are against the universal ball. The structure of the universal ball is as shown in FIG. Fig.12 As shown, it is ensured that the rotor shaft c does not move during rotation.

[0043] As a preferred embodiment of the present invention, a shock absorbing member is provided on the bottom plate 1 , and preferably, the shock absorbing member is a rubber shock absorbing member.

[0044] The process of fixing the stator and rotor assembly of the test device for testing the bearingless motor disclosed in the present invention is:

[0045] First, assemble the rotor assembly b and the stator assembly a together, and then put the assembled stator and rotor assembly into the test device, so that the first end of the rotor shaft c abuts against the first universal ball 611, and the second end of the rotor shaft c abuts against the second universal ball 641. If the placement position does not correspond during placement, the distance between the first universal ball 611 and the rotor shaft c can be adjusted by the clamping assembly to smoothly place the stator and rotor assembly to the corresponding position, and then the driving device 3 is used to drive the pressing plate 2 to move downward, and the first group of rotating clamping assemblies on the pressing plate 2 are opposite to the first group of rotating support assemblies on the bottom plate 1 to clamp and fix the first end of the rotor shaft. After clamping, ensure that the two load-bearing bearings and one clamping bearing are tangent to the first bearing position c1 of the rotor shaft c, and ensure that the two load-bearing bearings are The inscribed circle of the bearing and a clamping bearing is concentric with the groove of the bearing platform. The second group of rotating clamping components on the pressure plate 2 is opposite to the second group of rotating support components on the base plate 1, and the second end c2 of the rotor shaft is clamped and fixed. After clamping, it is ensured that the two load-bearing bearings and one clamping bearing are tangent to the second bearing position c2 of the rotor shaft c, and that the inscribed circle of the two load-bearing bearings and one clamping bearing is concentric with the groove of the bearing platform. The groove structure of the boss on the pressure plate 2 is opposite to the groove structure of the bearing platform on the base plate 1, and the groove structures together form a circle for fixing the stator assembly a, thereby completing the fixation of the stator and rotor assemblies, eliminating the steps of installing and then disassembling the bearings during the test, simplifying the test process, improving the detection efficiency and realizing batch detection.

[0046] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A testing device for testing a bearingless motor, characterized in that: include: A base plate (1), wherein the base plate (1) is provided with a bearing portion (11) for bearing the stator assembly (a) and a rotating support body (12) for bearing the rotor assembly (b); A pressure plate (2), the pressure plate (2) being configured to be slidably mounted, a surface of the pressure plate (2) facing the base plate (1) being provided with a pressing portion (21) cooperating with the bearing portion (11) to press the stator assembly (a), and the surface being provided with a rotation limiting body (22) cooperating with the rotation supporting body (12) to press the rotor assembly, the rotor assembly (b) being freely rotatable relative to the rotation supporting body (12) and the rotation limiting body (22); The bearing portion (11) is a bearing platform, the pressing portion (21) is a boss, the bearing platform and the boss both have a groove structure, and the groove structures of the bearing platform and the boss cooperate to press and fix the stator assembly; The rotation support body (12) comprises at least two groups of rotation support components, and the rotation limiting body (22) comprises at least two groups of rotation clamping components corresponding thereto, and the two groups of rotation support components and the two groups of rotation clamping components are paired and combined to limit the two ends of the rotor shaft; The rotation support assembly comprises: A load-bearing bearing (1211), at least two of which are used to rotatably support the rotor shaft; A support seat (1212), the load-bearing bearing (1211) being rotatably mounted on the support seat (1212), and the support seat (1212) is also provided with an avoidance groove for avoiding the rotor assembly; The rotating pressing assembly comprises: A clamping bearing (2211), there being at least one clamping bearing (2211), the clamping bearing (2211) and the load-bearing bearing (1211) cooperating to limit the position of the rotor shaft; A clamping bearing seat (2212), on which the clamping bearing (2211) is rotatably mounted; It also includes a tightening assembly (6), wherein the tightening assembly (6) includes: A clamping shaft (61), the clamping shaft (61) being configured to be linearly slidably mounted, and a first universal ball (611) being provided on an end surface of the clamping shaft (61) facing the rotor shaft; a return spring (62), wherein the pressing shaft (61) is pressed against the first end of the rotor shaft under the action of the return spring (62); a driving module (63), the driving module (63) being used to pull the clamping shaft (61) to move in a direction away from the rotor assembly; The clamping shaft (61) is slidably mounted on the shaft seat (65); a flange (612) is formed on the clamping shaft (61); the return spring (62) is sleeved on the clamping shaft (61); a first end of the return spring (62) is pressed against the flange (612); and a second end of the return spring (62) is pressed against the shaft seat (65).

2. The testing device for testing a bearingless motor according to claim 1, characterized in that: It also comprises a top plate (3), wherein the top plate (3) and the bottom plate (1) are fixedly connected via a plurality of guide columns (4), and the pressure plate (2) is slidably mounted on the guide columns (4).

3. The testing device for testing a bearingless motor according to claim 1, characterized in that: It also includes a driving device (5), which is arranged on the top plate (3) and is used to drive the pressing plate (2) to slide.

4. The testing device for testing a bearingless motor according to claim 1, characterized in that: The driving module (63) comprises: A turntable (631), wherein the turntable (631) is configured to be rotatably mounted; A driving rod (632), wherein a first end of the driving rod (632) is hinged to the rotating disk (631), and a second end of the driving rod (632) is hinged to the tightening shaft (61).

5. The testing device for testing a bearingless motor according to claim 1, characterized in that: The clamping assembly (6) further comprises a limiting shaft (64), the limiting shaft (64) being used to limit the second end of the rotor shaft, the limiting shaft (64) being fixed on a support seat (1212), and a second universal ball (641) being provided on an end surface of the limiting shaft (64) facing the rotor shaft.

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