Test bench clamping tool for external rotor motor

Abstract

The invention discloses a test bench clamping tool for an external rotor motor, and relates to the technical field of motor test tools, the test bench clamping tool comprises a bench body, and the upper end of the bench body is provided with a horizontally arranged horizontal motor test rotation mechanism and a vertically arranged vertical motor test rotation mechanism; the horizontal motor test rotation mechanism comprises a load motor and a coupling test unit; the vertical motor test rotation mechanism is fixedly arranged at the upper end of the rack body through the base mechanism; the base mechanism comprises a support assembly fixedly arranged at the upper end of the rack body, an elastic supporting assembly arranged in the middle of the support assembly and a limiting assembly used for supporting the elastic supporting assembly. When the horizontal motor test rotation mechanism does not work, the limiting assembly does not work; when the horizontal motor test rotation mechanism works, the limiting assembly works to drive the elastic supporting assembly to achieve rigid supporting of the vertical motor test rotation mechanism. According to the invention, it is ensured that the platform can maintain optimal dynamic characteristics and test precision in a wide load range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motor test tooling, in particular to a test bench clamping tool for an outer rotor motor. BACKGROUND

[0002] After the repair of the motor, single rotation is required to detect whether the data of the repaired motor meets the standard, and the trial rotation link is the key step of checking the performance of the motor and troubleshooting. The traditional motor trial rotation platform can only carry out trial rotation operation for a single installation form (either vertical or horizontal) motor. When trial rotation of motors with different installation forms is required, the trial rotation platform needs to be frequently replaced or adjusted, which not only consumes a lot of time and labor cost, but also is prone to errors during replacement and adjustment, thereby adversely affecting the stability and reliability of motor trial rotation.

[0003] The existing vertical-horizontal integrated motor trial rotation platform can adapt to motors with different installation forms by replacing the clamps, but the rigidity of the support structure is fixed. When testing high-power or load-varying motors, the fixed rigidity cannot simultaneously meet the shock absorption demand at low load and the stability demand at high load. The low-rigidity platform is prone to excessive deformation under heavy load, affecting the test accuracy; the high-rigidity platform may transmit excessive vibration under light load, also affecting the data accuracy. SUMMARY

[0004] To solve the defects in the prior art, the present application provides a test bench clamping tool for an outer rotor motor.

[0005] To solve the above technical problems, the present application provides the following technical solutions: The present application provides a test bench clamping tool for an outer rotor motor, comprising: a bench body, the upper end of the bench body is provided with a horizontal arrangement of a horizontal motor trial rotation mechanism and a vertical arrangement of a vertical motor trial rotation mechanism; The horizontal motor trial rotation mechanism comprises a load motor and a shaft coupling test unit; The vertical motor trial rotation mechanism is fixedly arranged at the upper end of the bench body through a base mechanism; The base mechanism comprises a support assembly fixedly arranged at the upper end of the bench body, an elastic support assembly arranged in the middle of the support assembly, and a limiting assembly for supporting the elastic support assembly; When the horizontal motor trial rotation mechanism is not working, the limiting assembly is not working; When the horizontal motor trial rotation mechanism is working, the limiting assembly works to drive the elastic support assembly to realize rigid support of the vertical motor trial rotation mechanism.

[0006] As a preferred technical scheme of the present application, the support assembly comprises: a lower support base fixedly arranged at the upper end of the gantry body; an upper support base connected with the lower support base through a plurality of support units; the support unit comprises a support column and an elastic plate arranged between the support column and the upper support base.

[0007] As a preferred technical scheme of the present application, the elastic support assembly comprises a plurality of groups of alternately arranged elastic rubber layers and steel plate layers; a cavity is formed at the center of the elastic support assembly, a central conical block is arranged in the cavity, the lower end of the central conical block is fixedly connected with the lower support base through a first buffer spring, and the upper end of the central conical block is fixedly connected with the upper support base through a second buffer spring.

[0008] As a preferred technical scheme of the present application, the limiting assembly is provided with two groups, and the two groups of limiting assemblies are arranged on the two sides of the elastic support assembly, respectively, the limiting assembly comprises a driving unit fixedly arranged in the support assembly, a driving rod connected with the driving unit, and an inclined surface sliding block connected with the other end of the driving rod, and the inclined surface of the inclined surface sliding block is arranged in abutment with one of the inclined surfaces of the central conical blocks.

[0009] As a preferred technical scheme of the present application, the elastic support assembly is provided with a lower mounting groove and an upper mounting groove at positions corresponding to the first buffer spring and the second buffer spring; the elastic support assembly is provided with a side mounting groove at a position corresponding to the inclined surface sliding block; a lower support column for supporting the inclined surface sliding block is arranged in the lower mounting groove, and an upper support column for supporting the central conical block is arranged in the upper mounting groove.

[0010] As a preferred technical scheme of the present application, an outer protective plate is arranged on the outer side of the elastic rubber layer and the steel plate layer, and the height of the outer protective plate is less than the total height of the elastic rubber layer and the steel plate layer.

[0011] As a preferred technical scheme of the present application, the base mechanism further comprises a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation fin arranged on the side of the elastic support assembly and different from the position of the limiting assembly, a heat conduction column arranged on the heat dissipation fin, and a heat conduction plate connected with the heat conduction column and arranged on the outer side of the outer protective plate.

[0012] As a preferred technical scheme of the present application, the heat conduction plate is connected with each of the steel plate layers through a heat conduction rod.

[0013] As a preferred technical solution of the present application, the included angle between the inclined surface of the central conical block and the horizontal plane is 15° to 30°.

[0014] As a preferred technical solution of the present application, the outer protective plate is a stainless steel plate.

[0015] The present application has the following beneficial effects: 1. The present application sets up a base mechanism composed of a support assembly, an elastic support assembly and a limiting assembly, and makes its working state linked with the horizontal motor test running mechanism, so as to realize self-adaptive adjustment of platform support stiffness. When the horizontal motor test running mechanism is not working, the limiting assembly is not working, and the elastic support assembly provides lower stiffness, effectively isolating vibration. When the horizontal motor test running mechanism is working, the limiting assembly works and drives the elastic support assembly to change into rigid support. This pure mechanical stiffness switching mechanism automatically triggered according to load working conditions ensures that the platform can maintain the best dynamic characteristics and test accuracy within a wide load range.

[0016] 2. The elastic support assembly of the present application adopts several groups of alternately arranged elastic rubber layers and steel plate layers, and sets up a central conical block supported by first and second buffer springs in the central cavity, which cooperates with the inclined surface slider of the limiting assembly to form a stable and reliable variable stiffness core. In the non-working state, the elastic rubber layer and the steel plate layer provide stable basic damping; in the working state, the inclined surface slider compresses the central conical block to form a rigid support column, the force flow path is clear, the stiffness changes significantly and rapidly, and the stability and anti-deformation ability of the platform under heavy load are greatly improved.

[0017] 3. In the present application, a heat dissipation assembly containing heat dissipation fins, heat conducting columns, heat conducting plates and heat conducting rods connecting each steel plate layer is additionally arranged, and is combined with the outer protective plate to construct a high-efficiency heat management channel. This structure can continuously conduct the heat generated by the elastic support assembly, especially each steel plate layer during vibration, to the external heat dissipation fins for dissipation, effectively preventing performance degradation of the elastic rubber layer due to excessive temperature rise, thereby ensuring the long-term stability of the stiffness and damping performance of the elastic support assembly under various working conditions, and prolonging the service life of the tooling. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

[0019] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0020] Figure 2 It is a sectional view of the elastic support assembly.

[0021] Figure 3 is a sectional view of the elastic rubber layer and the steel plate layer.

[0022] Figure 4 is a sectional view of the elastic support assembly in another working state.

[0023] Figure 5 is Figure 4 is a local enlarged view of A in the middle.

[0024] Figure 6 is a structural view of the heat dissipation assembly.

[0025] In the figure: 1, gantry body; 2, horizontal motor test running mechanism; 21, load motor; 22, shaft coupling test unit; 3, vertical motor test running mechanism; 4, base mechanism; 5, support assembly; 51, lower support seat; 52, upper support seat; 53, support unit; 531, support column; 532, elastic plate; 6, elastic support assembly; 61, elastic rubber layer; 62, steel plate layer; 63, central conical block; 64, first buffer spring; 65, second buffer spring; 66, lower mounting groove; 67, upper mounting groove; 68, side mounting groove; 69, outer protective plate; 7, limiting assembly; 71, driving unit; 72, driving rod; 73, inclined surface sliding block; 8, heat dissipation assembly; 81, heat dissipation fin; 82, heat conduction column; 83, heat conduction plate; 9, lower support column; 10, upper support column. DETAILED DESCRIPTION

[0026] The technical solutions in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0027] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0028] As Figures 1-2As shown, a test bench clamping tool for an outer rotor motor includes a bench body 1, the upper end of the bench body 1 is provided with a horizontal arrangement of horizontal motor test mechanism 2 and vertical arrangement of vertical motor test mechanism 3; The horizontal motor test mechanism 2 includes load motor 21, shaft coupling test unit 22; The vertical motor test mechanism 3 is fixedly arranged on the upper end of the bench body 1 through the base mechanism 4; The base mechanism 4 includes a support assembly 5 fixedly arranged on the upper end of the bench body 1, an elastic support assembly 6 arranged in the middle of the support assembly 5, and a limiting assembly 7 for supporting the elastic support assembly 6; When the horizontal motor test mechanism 2 is not working, the limiting assembly 7 is not working; When the horizontal motor test mechanism 2 works, the limiting assembly 7 works to drive the elastic support assembly 6 to realize rigid support for the vertical motor test mechanism 3.

[0029] In the present application, the bench body 1 is the basic support structure of the whole tool, and the upper end of the bench body 1 is integrated with horizontal arrangement of horizontal motor test mechanism 2 and vertical arrangement of vertical motor test mechanism 3, realizing the function of vertical and horizontal integration. The horizontal motor test mechanism 2 is used for testing the horizontal installation form of the outer rotor motor, which specifically includes load motor 21 and shaft coupling test unit 22, wherein the load motor 21 is used for simulating the actual working load, and the shaft coupling test unit 22 is used for connecting and testing the transmission performance of the motor. The vertical motor test mechanism 3 is used for testing the vertical installation form of the outer rotor motor, and is fixed on the upper end of the bench body 1 through the base mechanism 4, and its specific structure is the same as that of the horizontal motor test mechanism 2, and details are not repeated.

[0030] The base mechanism 4 is composed of three parts: the support assembly 5, the elastic support assembly 6 and the limiting assembly 7. The support assembly 5 is fixed on the upper end of the bench body 1 and serves as the external frame of the whole base mechanism 4. The elastic support assembly 6 is arranged in the middle of the support assembly 5 and provides basic flexible support. The limiting assembly 7 is used to dynamically adjust the state of the elastic support assembly 6. When the horizontal motor test mechanism 2 is not working, the limiting assembly 7 is in a non-working state, and at this time the elastic support assembly 6 maintains its original flexible state, which can effectively absorb and buffer the vibration generated in the vertical motor test process, thereby meeting the shock absorption requirement under low load.

[0031] When the horizontal motor test running mechanism 2 starts to work, the limiting assembly 7 is activated and enters the working state, and by driving the specific structure inside the elastic support assembly 6, the elastic support assembly 6 is changed from a flexible state to a rigid state, thereby realizing rigid support for the vertical motor test running mechanism 3. This rigid support ensures that the base mechanism 4 has sufficient rigidity when the horizontal motor is under high load or the load changes sharply, avoiding excessive deformation, thereby maintaining the high precision and reliability of the test data. The entire tooling does not need to be frequently replaced or adjusted, significantly saving time and labor costs, and eliminating the error risk caused by the adjustment process in the traditional scheme.

[0032] Further, as shown in Figures 1-2 , the support assembly 5 comprises: a lower support base 51 fixedly arranged at the upper end of the gantry body 1; an upper support base 52 connected with the lower support base 51 through a plurality of support units 53; The support unit 53 comprises a support column 531 and an elastic plate 532 arranged between the support column 531 and the upper support base 52.

[0033] The support assembly 5 serves as the external frame of the base mechanism 4, and its structural design ensures the overall stability and adjustability. The lower support base 51 is fixedly arranged at the upper end of the gantry body 1 and serves as the bottom reference of the support assembly 5, being firmly connected with the gantry body 1 through bolts or other fasteners to provide an initial support point. The upper support base 52 is located at the top of the support assembly 5 and is connected with the vertical motor test running mechanism 3 for bearing the weight and running load of the vertical motor. The upper support base 52 is connected with the lower support base 51 through a plurality of support units 53, which are evenly distributed inside the support assembly 5 to form a stable support network.

[0034] Each support unit 53 specifically comprises a support column 531 and an elastic plate 532. The support column 531 is a rigid column arranged vertically between the lower support base 51 and the upper support base 52 as the main force bearing path. The elastic plate 532 is arranged between the support column 531 and the upper support base 52, i.e. between the upper end of the support column 531 and the lower end face of the upper support base 52, and is made of flexible material for introducing a certain elastic deformation capacity when the support column 531 transmits the load. The presence of the elastic plate 532 enables the support assembly 5 to have shock absorption characteristics under static or low load working conditions, and under high load working conditions, the deformation of the elastic plate 532 is limited when the limiting assembly 7 works, thereby achieving rigidity adjustment in cooperation.

[0035] Further, as shown in Figures 2-3 , the elastic support assembly 6 comprises a plurality of groups of alternating elastic rubber layers 61 and steel plate layers 62; The elastic support assembly 6 is provided with a cavity at the center opening position, and a central conical block 63 is arranged in the cavity.

[0036] The elastic rubber layer 61 and the steel plate layer 62 are stacked in the vertical direction to form a composite laminated structure, the elastic rubber layer 61 provides damping and shock absorption function, and the steel plate layer 62 enhances the overall strength and stability of the structure. The elastic support assembly 6 is provided with a cavity at the center opening position, and the cavity is designed in a through type and extends in the vertical direction to accommodate key components. A central conical block 63 is arranged in the cavity, and the central conical block 63 is in a conical structure, and the conical surface is used to cooperate with the inclined sliding block 73 in the limiting assembly 7.

[0037] In detail, the lower end of the central conical block 63 is fixedly connected with the lower support base 51 through the first buffer spring 64, the upper end of the first buffer spring 64 is connected with the lower end of the central conical block 63, and the lower end is fixed to the corresponding position of the lower support base 51. The upper end of the central conical block 63 is fixedly connected with the upper support base 52 through the second buffer spring 65, the lower end of the second buffer spring 65 is connected with the upper end of the central conical block 63, and the upper end is fixed to the corresponding position of the upper support base 52. The first buffer spring 64 and the second buffer spring 65 jointly act on the central conical block 63 to keep the central conical block 63 at the center position of the cavity without external interference, i.e. in a neutral state. In this embodiment, the second buffer spring 65 can be arranged inside or outside the lower support column 9, as long as it is stably arranged.

[0038] It should be noted that.

[0039] Further, as shown in Figures 2-5 The limiting assembly 7 is provided with two groups, and the two groups of limiting assemblies 7 are arranged on the two sides of the elastic support assembly 6. The limiting assembly 7 includes a driving unit 71 fixedly arranged in the bracket assembly 5, a driving rod 72 connected with the driving unit 71, and an inclined sliding block 73 connected with the other end of the driving rod 72. The inclined surface of the inclined sliding block 73 is arranged in close contact with one of the inclined surfaces of the central conical block 63.

[0040] The slope of the slope sliding block 73 is in close contact with one of the slopes in the central conical block 63, that is, when the limiting assembly 7 works, the slope of the slope sliding block 73 is in close contact with the slope of the central conical block 63, forming mechanical interlocking. When the horizontal motor test mechanism 2 works, the driving unit 71 is activated, and the slope sliding block 73 is pushed to the center of the elastic support assembly 6 by the driving rod 72. Because the slope of the slope sliding block 73 is in close contact with the slope of the central conical block 63, the movement of the slope sliding block 73 will push the central conical block 63 upwards along the slope, compress the second buffer spring 65, and generate a pre-tightening force. When the limiting assembly 7 does not work, the slope sliding block 73 is in the initial position, and there is a gap between the slope sliding block 73 and the central conical block 63, which does not affect the flexible state of the elastic support assembly 6.

[0041] It should be noted that the driving unit 71 can adopt a pneumatic, hydraulic or electric actuator, and the specific structure will not be described here.

[0042] Further, as shown in Figure 5 The elastic support assembly 6 is provided with a lower installation groove 66 and an upper installation groove 67 at positions corresponding to the first buffer spring 64 and the second buffer spring 65; The elastic support assembly 6 is provided with a side installation groove 68 at a position corresponding to the slope sliding block 73; The inside of the lower installation groove 66 is provided with a lower support column 9 for supporting the slope sliding block 73, and the inside of the upper installation groove 67 is provided with an upper support column 10 for supporting the central conical block 63.

[0043] Wherein, in the working state of the limiting assembly 7, the upper support column 10 at the lower end is connected to the upper support seat 52, the upper support column 10 at the lower end is in close contact with the central conical block 63, the lower end of the central conical block 63 is two groups of slope sliding blocks 73, and the lower end of the two groups of slope sliding blocks 73 is the lower support column 9. The lowermost end of the lower support seat 51. This continuous connection path forms a complete rigid support chain.

[0044] In detail, when the limiting assembly 7 works, the upper support seat 52 transmits the load to the upper end of the central conical block 63 through the upper support column 10. The central conical block 63 is pushed upwards by the slope sliding block 73, and the load at the lower end is transmitted to the lower support column 9 through the two groups of slope sliding blocks 73, and finally transmitted to the lower support seat 51 by the lower support column 9.

[0045] This connection mode makes the load originally borne by the elastic support assembly 6 stack completely transfer to the rigid path composed of the upper support column 10, the central conical block 63, the inclined slide block 73, the lower support column 9 and the lower support base 51, thereby realizing rigid support of the vertical motor test running mechanism 3, and in addition, the elastic support assembly 6 stack also bears certain load, ensuring accurate alignment and stable operation of each component during movement.

[0046] Further, as shown in Figures 2-4 The outer side of the elastic rubber layer 61 and the steel plate layer 62 is provided with an outer protective plate 69, and the height of the outer protective plate 69 is less than the total height of the elastic rubber layer 61 and the steel plate layer 62.

[0047] In the elastic support assembly 6, the outer side of the elastic rubber layer 61 and the steel plate layer 62 is provided with an outer protective plate 69, which is arranged along the circumference of the elastic support assembly 6 to form a surrounding protection structure, and the height of the outer protective plate 69 is less than the total height of the elastic rubber layer 61 and the steel plate layer 62, that is, when the elastic rubber layer 61 and the steel plate layer 62 are stacked, the top and bottom thereof will slightly exceed the range of the outer protective plate 69. This height design ensures that when the elastic support assembly 6 is deformed under pressure, the outer protective plate 69 will not limit the lateral expansion of the elastic rubber layer 61, while providing necessary external protection.

[0048] The main function of the outer protective plate 69 is to prevent external dust, debris or liquid from entering between the elastic rubber layer 61 and the steel plate layer 62, so as to avoid pollution or corrosion affecting the performance of the stack structure.

[0049] Further, as shown in Figure 6 The base mechanism 4 further comprises a heat dissipation assembly 8, which comprises a heat dissipation fin 81 arranged on the side of the elastic support assembly 6 and different from the position of the limiting assembly 7, a heat conduction column 82 arranged on the heat dissipation fin 81, and a heat conduction plate 83 connected with the heat conduction column 82 and arranged outside the outer protective plate 69.

[0050] Among them, the long-time high-load operation of the motor will generate a large amount of heat, and the increase of the platform temperature will cause the stiffness of the rubber layer to decrease (thermal softening effect), affecting the support stability.

[0051] To address the aforementioned issues, the base mechanism 4 also integrates a heat dissipation component 8 to resolve potential heat accumulation during motor trial operation. The heat dissipation component 8 is positioned on the side of the elastic support component 6, but at a different location than the limiting component 7, thus avoiding interference with components such as the driving unit 71 and driving rod 72 of the limiting component 7. Specifically, the heat dissipation component 8 includes heat dissipation fins 81, heat-conducting pillars 82, and a heat-conducting plate 83. The heat dissipation fins 81 are directly positioned on the side of the elastic support component 6, serving as the basic unit for heat diffusion. Heat-conducting pillars 82 are provided on the heat dissipation fins 81, extending perpendicularly to the heat dissipation fins 81 to concentrate the heat conduction path. The heat-conducting pillars 82 are connected to the heat-conducting plate 83, which is located on the outside of the outer protective plate 69, i.e., in the external space of the outer protective plate 69, serving as the final interface for heat dissipation.

[0052] This layout ensures the efficiency and independence of the heat dissipation path: the heat dissipation fins 81 increase the contact area with the air, the heat conduction pillars 82 enhance the heat conduction efficiency, and the heat conduction plate 83 provides a large area of ​​heat dissipation surface. The main function of the heat conduction plate 83 is to transfer the heat in the steel plate layer 62 to the outside.

[0053] Furthermore, such as Figure 6 As shown, the heat-conducting plate 83 is connected to each of the steel plate layers 62 via heat-conducting rods.

[0054] A thermal connection is established between the heat-conducting plate 83 and each steel plate layer 62 through a heat-conducting rod. The heat-conducting rod is a slender rod-shaped structure, with one end fixedly connected to the heat-conducting plate 83 and the other end fixedly connected to each steel plate layer 62. This connection method ensures that heat can be directly transferred from the steel plate layer 62 inside the elastic support component 6 to the external heat-conducting plate 83 without relying on the thermal conductivity of the elastic rubber layer 61.

[0055] Furthermore, such as Figure 5 As shown, the angle between the inclined surface of the central conical block 63 and the horizontal plane is 15° to 30°, and the working inclined surface of the inclined slider 73 has a coating that matches the inclined surface of the central conical block 63.

[0056] When the angle is less than 15°, the stroke required for the inclined slider 73 to push the central cone block 63 is too large, resulting in sluggish action; when the angle is greater than 30°, the mechanical efficiency of the inclined interlock is reduced, the preload is insufficient, and the rigid support effect is affected. Therefore, the included angle of 15° to 30° ensures that when the limit component 7 is working, the inclined slider 73 can generate a sufficiently large normal force with a small driving force to achieve fast and reliable stiffness switching.

[0057] The coating covers the working slope of the slope sliding block 73, the material and surface characteristics of which are completely matched with the slope of the central conical block 63, so as to reduce friction and wear, the existence of the coating ensures smooth movement of the slope sliding block 73 and the central conical block 63 in the fitting process, avoids sticking or noise caused by dry friction, and maintains stable contact pressure under high load.

[0058] Optionally, the coating is polytetrafluoroethylene or copper-based powder metallurgy material, the polytetrafluoroethylene coating has an extremely low friction coefficient, can realize smooth sliding and reduce wear; the copper-based powder metallurgy coating has good self-lubricating property and high thermal conductivity, can reduce friction and assist heat dissipation.

[0059] Further, the outer protective plate 69 is a stainless steel plate, the material of the outer protective plate 69 can effectively resist the influence of external environmental factors (such as humidity, chemical corrosion), prolong the service life of the outer protective plate 69.

[0060] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application are described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included in the protection scope of the present application.

Claims

1. A test bench clamping fixture for an outer rotor electric machine, characterized in that, The utility model relates to a horizontal and vertical motor test bench, comprising: a rack body (1) provided with a horizontal motor test mechanism (2) and a vertical motor test mechanism (3) at the upper end of the rack body (1); the horizontal motor test mechanism (2) comprises a load motor (21) and a shaft coupling test unit (22); the vertical motor test mechanism (3) is fixedly arranged at the upper end of the rack body (1) through a base mechanism (4); the base mechanism (4) comprises a support assembly (5) fixedly arranged at the upper end of the rack body (1), an elastic support assembly (6) arranged in the middle of the support assembly (5) and a limiting assembly (7) for supporting the elastic support assembly (6); when the horizontal motor test mechanism (2) is not working, the limiting assembly (7) is not working; when the horizontal motor test mechanism (2) is working, the limiting assembly (7) is working to drive the elastic support assembly (6) to rigidly support the vertical motor test mechanism (3).

2. A test bed clamping fixture for an outer rotor electric machine according to claim 1, characterized in that, the support assembly (5) comprises: a lower support base (51) fixedly arranged at the upper end of the rack body (1); an upper support base (52) connected to the lower support base (51) through a plurality of support units (53); the support unit (53) comprises a support column (531) and an elastic plate (532) arranged between the support column (531) and the upper support base (52).

3. A test bed clamping fixture for an outer rotor electric machine according to claim 2, characterized in that, the elastic support assembly (6) comprises a plurality of groups of alternately arranged elastic rubber layers (61) and steel plate layers (62); a cavity is formed in the center of the elastic support assembly (6), a central conical block (63) is arranged in the cavity, the lower end of the central conical block (63) is fixedly connected to the lower support base (51) through a first buffer spring (64), and the upper end of the central conical block (63) is fixedly connected to the upper support base (52) through a second buffer spring (65).

4. A test bed clamping fixture for an outer rotor electric machine according to claim 3, characterized in that, the limiting assembly (7) is arranged in two groups, and the two groups of limiting assemblies (7) are arranged on the two sides of the elastic support assembly (6), respectively; the limiting assembly (7) comprises a driving unit (71) fixedly arranged in the support assembly (5), a driving rod (72) connected to the driving unit (71) and an inclined surface sliding block (73) connected to the other end of the driving rod (72), and the inclined surface of the inclined surface sliding block (73) is arranged in abutment with one of the inclined surfaces of the central conical block (63).

5. A test bed clamping fixture for an outer rotor electric machine according to claim 4, characterized in that, the elastic support assembly (6) is provided with a lower mounting groove (66) and an upper mounting groove (67) at positions corresponding to the first buffer spring (64) and the second buffer spring (65); the elastic support assembly (6) is provided with a side mounting groove (68) at a position corresponding to the inclined surface sliding block (73); the lower mounting groove (66) is provided with a lower support stand (9) for supporting the inclined surface sliding block (73), and the upper mounting groove (67) is provided with an upper support stand (10) for supporting the central conical block (63).

6. A test bed clamping fixture for an outer rotor electric machine according to claim 3, characterized in that, The outer side of the elastic rubber layer (61) and the steel plate layer (62) is provided with an outer protective plate (69), the height of the outer protective plate (69) is less than the total height of the elastic rubber layer (61) and the steel plate layer (62).

7. A test bed clamping fixture for an outer rotor electric machine according to claim 6, characterized in that, The base mechanism (4) further comprises a heat dissipation assembly (8), the heat dissipation assembly (8) comprises heat dissipation fins (81) arranged at the side of the elastic support assembly (6) and different from the position of the limiting assembly (7), heat conduction columns (82) arranged on the heat dissipation fins (81), and heat conduction plates (83) connected with the heat conduction columns (82) and arranged outside the outer protective plate (69).

8. A test bed clamping fixture for an outer rotor electric machine according to claim 7, characterized in that, The heat conduction plates (83) and each of the steel plate layers (62) are connected through heat conduction rods.

9. A test bed clamping fixture for an outer rotor electric machine according to claim 4, characterized in that, The included angle between the inclined surface of the central conical block (63) and the horizontal plane is 15° to 30°.

10. A test bed clamping fixture for an outer rotor electric machine according to claim 8, characterized in that, The outer protective plate (69) is a stainless steel plate.

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