Electromagnetic compatibility testing device for electrically driven product

Abstract

The utility model relates to the technical field of electromagnetic compatibility performance testing, and discloses an electromagnetic compatibility testing device for an electric drive product, the electromagnetic compatibility testing device for the electric drive product comprises a testing seat, a dynamometer shaft and an insulation connecting assembly, the testing seat can be arranged on a testing table top, the dynamometer shaft is rotatably arranged on the testing seat in a penetrating manner, and the insulation connecting assembly is arranged on the testing seat. The insulation connecting assembly is provided with an insulation part arranged between the dynamometer shaft and the motor shaft, and the insulation part has insulation performance and can connect the dynamometer shaft and the motor shaft, so that the insulation part of the insulation connecting assembly can perform insulation isolation between the dynamometer shaft and the motor shaft to play a role in increasing the insulation area. Therefore, the purposes of improving the insulation effect and ensuring the reliability of the EMC test result are achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electromagnetic compatibility performance testing, and particularly relates to an electromagnetic compatibility testing device for electric drive products. Background Technique

[0002] Electromagnetic Compatibility (EMC) refers to the ability of a device or system to operate in its electromagnetic environment in compliance with requirements and not generate intolerable electromagnetic interference to any device in its environment. Therefore, EMC includes two aspects of requirements: on the one hand, it means that the electromagnetic interference generated by the device during normal operation in the environment where it is located cannot exceed a certain limit; on the other hand, it means that the appliance has a certain degree of immunity to the electromagnetic interference existing in the environment where it is located, that is, electromagnetic sensitivity.

[0003] At present, new energy vehicles led by electric vehicles are increasingly popular in the market. The motor and its control system, as the core components of electric vehicles, are as important as traditional engines. Due to its own characteristics, the EMC (electromagnetic compatibility) problem of the system is quite severe. Therefore, EMC testing is an important link in the development of new energy vehicles.

[0004] When conducting component EMC testing on the electric drive products of electric vehicles, it is necessary to simulate their load conditions on the vehicle and conduct testing. The motor shaft needs to be connected to the dynamometer bench that simulates the wheel load. Therefore, a tooling is required to fix the electric drive product on the test bench and connect the motor shaft to the dynamometer shaft. However, in the currently used tooling, the motor shaft and the dynamometer shaft are connected by connecting bolts, and only an insulating gasket is pressed on the head of the connecting bolt. The insulating area is small, and the insulation effect between the motor shaft and the dynamometer shaft is poor, affecting the EMC test results. Moreover, the insulating material is generally resin, which will be worn or cracked after long-term use, resulting in contact between the bolt and the tooling and the failure of the insulation effect. Content of the Utility Model

[0005] The purpose of the utility model is to provide an electromagnetic compatibility testing device for electric drive products, aiming to solve the technical problem that the existing tooling has poor insulation effect and affects the EMC test results.

[0006] To achieve the above purpose, the utility model provides an electromagnetic compatibility testing device for electric drive products, wherein the electromagnetic compatibility testing device includes a test seat, a dynamometer shaft, and an insulating connection assembly; the dynamometer shaft is rotatably disposed through the test seat; the insulating connection assembly has an insulating portion disposed between the dynamometer shaft and the motor shaft, and the insulating portion has insulating properties and can connect the dynamometer shaft and the motor shaft.

[0007] In some embodiments, the dynamometer shaft includes a dynamometer shaft body portion and a dynamometer disc body portion that are coaxially arranged in sequence. The shaft diameter of the dynamometer disc body portion is larger than that of the dynamometer shaft body portion. The dynamometer shaft body portion is rotatably disposed through the test seat. The insulation connection assembly includes an insulation block and a first fastener. The insulation block is provided as an insulation portion and is placed between the side of the dynamometer disc body portion facing away from the dynamometer shaft body portion and the motor disc body portion of the motor shaft. And the dynamometer disc body portion and the motor disc body portion are respectively connected to the insulation block through the first fastener.

[0008] In some embodiments, the insulation connection assembly further includes a first insulation gasket. The first insulation gasket is sleeved on the first fastener and spaced from the pressing head of the first fastener and the dynamometer disc body portion or the motor disc body portion; and / or, at least one of the dynamometer disc body portion and the motor disc body portion is provided with a first through hole for the shank portion of the first fastener to pass through. The aperture of the first through hole is larger than the shaft diameter of the shank portion of the first fastener and smaller than the shaft diameter of the pressing head of the first fastener.

[0009] In some embodiments, the insulation block is provided with a first connection hole and a second connection hole spaced apart. The first through holes are respectively provided on both the dynamometer disc body portion and the motor disc body portion. And the first through hole on the dynamometer disc body portion and the first through hole on the motor disc body portion are respectively arranged in one-to-one correspondence with the first connection hole and the second connection hole. The dynamometer disc body portion is tightly connected to the insulation block by the first fastener passing through the corresponding first through hole and passing through the first connection hole. The motor disc body portion is tightly connected to the insulation block by the first fastener passing through the corresponding first through hole and passing through the second connection hole.

[0010] In some embodiments, the insulation block is provided as a nylon part.

[0011] In some embodiments, the electromagnetic compatibility test device further includes a bearing seat assembly. The bearing seat assembly includes an insulating bearing seat and a bearing body. The insulating bearing seat is disposed on the test seat and has insulating properties. The bearing body is disposed in the bearing seat hole of the insulating bearing seat. The dynamometer shaft is disposed through the bearing hole of the bearing body.

[0012] In some embodiments, the insulating bearing seat is disposed on the side of the test seat facing away from the insulation connection assembly. And the bearing seat assembly further includes a bearing seat cover body. The bearing seat cover body is sleeved on the dynamometer shaft and covers one end of the insulating bearing seat away from the test seat.

[0013] In some embodiments, the bearing seat cover body includes a cover body and a boss portion. The cover body is used for being disposed in a fitting manner with the end face of the insulating bearing seat. The boss portion is disposed on the side of the cover body facing the insulating bearing seat and can extend into the bearing seat hole of the insulating bearing seat for clamping.

[0014] In some embodiments, the electromagnetic compatibility test device further includes an insulating bottom plate having insulating properties. The insulating bottom plate is placed between the test tabletop and the test seat.

[0015] In some embodiments, the test socket includes a test base plate and a test vertical plate. The test base plate can be placed flat on the insulating base plate. The test vertical plate is vertically extended on the side of the test base plate away from the insulating base plate. The dynamometer shaft can be rotatably passed through the test vertical plate, and the test base plate, the insulating base plate and the test table are fixedly connected by a second fastener.

[0016] In some embodiments, a second through hole is provided on both the test base plate and the insulating base plate, and a third threaded hole is provided on the test table top. The aperture of the second through hole is larger than the axial diameter of the shaft portion of the second fastener and smaller than the axial diameter of the clamping head portion of the second fastener. The inner wall of the third threaded hole can be threadedly connected to the second fastener; and / or, a second insulating gasket is also provided between the clamping head portion of the second fastener and the test base plate.

[0017] Through the above technical solution, the electromagnetic compatibility test device provided by the embodiment of the utility model has the following beneficial effects:

[0018] When the electric drive product uses the above-mentioned electromagnetic compatibility test device, an insulating connection component is additionally provided to connect the dynamometer shaft and the motor shaft, and the insulating portion of the insulating connection component has insulating properties and is placed between the dynamometer shaft and the motor shaft, so that the insulating portion of the insulating connection component can perform insulation barrier between the dynamometer shaft and the motor shaft, thereby increasing the insulation area, thereby achieving the purpose of improving the insulation effect and ensuring the reliability of the EMC test results.

[0019] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0021] Figure 1 It is a structural schematic diagram of an electromagnetic compatibility testing device according to an embodiment of the utility model;

[0022] Figure 2 It is a disassembly schematic diagram of a dynamometer shaft, a motor shaft, an insulating connection assembly and a bearing seat assembly according to an embodiment of the utility model.

[0023] Description of Reference Numerals

[0024] 100 Test socket 110 Test base

[0025] 111 Second insulating gasket 120 Test vertical plate

[0026] 200 Dynamometer shaft 210 Dynamometer shaft body part

[0027] 220 Dynamometer disk body part 300 Insulating connection assembly

[0028] 310 Insulating block 311 First connection hole

[0029] 312 Second connection hole 400 Bearing seat assembly

[0030] 410 Insulating bearing seat 411 Third through hole

[0031] 420 Bearing body 430 Bearing seat cover body

[0032] 431 Boss part 500 Insulating bottom plate

[0033] 600 Motor shaft 610 Motor shaft body part

[0034] 620 Motor disk body part Specific embodiments

[0035] The following details the specific embodiments of the present utility model in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustration and explanation of the present utility model, and are not used to limit the present utility model.

[0036] The following describes an electromagnetic compatibility test device for an electric drive product according to the present utility model with reference to the accompanying drawings.

[0037] As Figure 1 shown, the present utility model provides an electromagnetic compatibility test device for an electric drive product, wherein the electromagnetic compatibility test device for an electric drive product includes:

[0038] A test seat 100, which can be arranged on a test tabletop;

[0039] A dynamometer shaft 200, rotatably passing through the test seat 100;

[0040] An insulating connection assembly 300, having an insulating part disposed between the dynamometer shaft 200 and the motor shaft 600, the insulating part having insulating properties and being capable of connecting the dynamometer shaft 200 and the motor shaft 600.

[0041] When the electric drive product uses the above electromagnetic compatibility test device, since an insulating connection assembly 300 connecting the dynamometer shaft 200 and the motor shaft 600 is additionally provided, and the insulating portion of the insulating connection assembly 300 has insulating properties and is disposed between the dynamometer shaft 200 and the motor shaft 600, the insulating portion of the insulating connection assembly 300 can perform insulating isolation between the dynamometer shaft 200 and the motor shaft 600, so as to play a role in increasing the insulating area, and further achieve the purpose of improving the insulating effect and ensuring the reliability of the EMC test result.

[0042] See Figure 1 and Figure 2 , in some embodiments, the dynamometer shaft 200 includes a dynamometer shaft body portion 210 and a dynamometer disk body portion 220 arranged coaxially in sequence. The shaft diameter of the dynamometer disk body portion 220 is larger than that of the dynamometer shaft body portion 210. The dynamometer shaft body portion 210 is rotatably disposed through the test seat 100. The insulating connection assembly 300 includes an insulating block 310 and a first fastener. The insulating block 310 is provided as an insulating portion and is disposed between the side of the dynamometer disk body portion 220 facing away from the dynamometer shaft body portion 210 and the motor disk body portion 620 of the motor shaft 600. The dynamometer disk body portion 220 and the motor disk body portion 620 are respectively connected to the insulating block 310 through the first fastener. That is, the insulating block 310 has insulating properties to perform insulating isolation between the dynamometer disk body portion 220 and the motor disk body portion 620. Providing the dynamometer shaft 200 with the dynamometer disk body portion 220 facilitates the passing of the first fastener. It can be understood that the motor shaft 600 includes a motor shaft body portion 610 and a motor disk body portion 620 arranged coaxially in sequence. The shaft diameter of the motor disk body portion 620 is larger than that of the motor shaft body portion 610. Specifically, the insulating block 310, the dynamometer disk body portion 220, and the motor disk body portion 620 are all disk-shaped and have the same diameter size. The radial size and thickness size of the insulating block 310 can be designed according to the size of the motor shaft 600 and the parasitic capacitance of the universal shaft paired with the motor shaft 600 in the whole vehicle. More specifically, the diameter size of the insulating block 310 can be 100 mm to 140 mm, and the thickness size can be 30 mm to 70 mm. Preferably, the diameter size of the insulating block 310 can be 120 mm, and the thickness size can be 50 mm.

[0043] In some embodiments, the insulating connection assembly 300 further includes a first insulating gasket, which is sleeved on the first fastener and spaced from the pressing head of the first fastener and the dynamometer disc body portion 220 or the motor disc body portion 620. That is, by adding the first insulating gasket, the pressing head of the first fastener and the dynamometer disc body portion 220 or the motor disc body portion 620 can also be insulated, so as to further increase the insulating area. Of course, the pressing head of the first fastener mentioned in the present invention can be the head of the first fastener itself, such as a bolt head, or a lock nut sleeved on the rod body of the first fastener.

[0044] In some embodiments, at least one of the dynamometer disc body portion 220 and the motor disc body portion 620 is provided with a first through hole for the rod body of the first fastener to pass through. The diameter of the first through hole is larger than the shaft diameter of the rod body of the first fastener and smaller than the shaft diameter of the pressing head of the first fastener. The addition of the first through hole can make the corresponding disc body portion and the rod body of the first fastener be spaced in the circumferential direction, so as to further increase the insulating area. It should be particularly noted that in order to realize the fastening connection function of the first fastener, when the first fastener passes through the first through hole, it also needs to have a fastening connection with the remaining one of the dynamometer disc body portion 220 and the motor disc body portion 620 and / or the insulating block 310.

[0045] See Figure 2 , in some embodiments, the insulating block 310 is provided with a first connection hole 311 and a second connection hole 312 at intervals. Specifically, a plurality of first connection holes and a plurality of second connection holes can be arranged on the same circumference and alternately spaced in sequence. The dynamometer disc body portion 220 and the motor disc body portion 620 are both provided with first through holes, and the first through holes on the dynamometer disc body portion 220 and the first through holes on the motor disc body portion 620 are respectively arranged in one-to-one correspondence with the first connection hole 311 and the second connection hole 312. The dynamometer disc body portion 220 is fixedly connected to the insulating block 310 by passing the first fastener through the corresponding first through hole and into the first connection hole 311, and the motor disc body portion 620 is fixedly connected to the insulating block 310 by passing the first fastener through the corresponding first through hole and into the second connection hole 312. That is, the dynamometer disc body portion 220 and the motor disc body portion 620 are respectively threadedly connected to the insulating block 310 by the first fastener alone. Compared with using the first fastener to serially fasten and connect the three, it can significantly reduce the torque of the first fastener during the test. In addition, in order to realize the fastening connection between the inner walls of the first connection hole 311 and the second connection hole 312 and the first fastener respectively, the first connection hole 311 and the second connection hole 312 can both be set as threaded holes, the first fastener can be set as a bolt, a screw rod, etc., and a nut is also required to cooperate for locking. Of course, the present invention is not limited to this, and the first fastener can also be set as a rivet or a pin, etc.

[0046] Specifically, one of the first connection hole 311 and the second connection hole 312 can be set as a through-thread hole, and the other can be set as a threaded hole with a head receiving groove. That is, the first fastener corresponding to the through-thread hole is set to pass through the first through-hole on the corresponding disk body part in sequence and be threadedly connected into the through-thread hole, and the first fastener corresponding to the threaded hole with a head receiving groove is set to pass through the head receiving groove, the threaded hole, and the first through-hole on the corresponding disk body part in sequence, and be locked by a lock nut.

[0047] More specifically, the number of the first fasteners connecting the dynamometer disk body part 220 and the insulating block 310 can be multiple, and the number of the first fasteners connecting the motor disk body part 620 and the insulating block 310 can also be multiple. Correspondingly, the number of the first connection holes 311 and the second connection holes 312 on the insulating block 310 can both be multiple. The multiple first connection holes 311 and the multiple second connection holes 312 can be alternately arranged at intervals in the same circumference in sequence to ensure the stability of the connection.

[0048] In some embodiments, first through-holes are formed on both the dynamometer disk body part 220 and the motor disk body part 620. The aperture of the first through-hole is larger than the shaft diameter of the corresponding rod body part of the first fastener. On the insulating block 310, a first connection hole 311 corresponding to the first through-hole on the dynamometer disk body part 220 and a second connection hole 312 corresponding to the first through-hole on the motor disk body part 620 are formed. The dynamometer disk body part 220 is tightly connected to the insulating block 310 by the first fastener passing through the corresponding first through-hole and being inserted into the first connection hole 311. The motor disk body part 620 is tightly connected to the insulating block 310 by the first fastener passing through the corresponding first through-hole and being inserted into the second connection hole 312. At the same time, first insulating gaskets are provided between the pressing head of the first fastener and the dynamometer disk body part 220 and between the pressing head of the first fastener and the motor disk body part 620. That is, the first fastener is insulated from the dynamometer disk body part 220 and the motor disk body part 620 not only in the rod body part but also in the pressing head, so that the dynamometer disk body part 220 and the motor disk body part 620 are insulated at all positions. Specifically, a first counterbore for placing the first insulating gasket can be formed on the periphery of the first through-hole.

[0049] In some embodiments, the insulating block 310 can be made of nylon. That is, the insulating block 310 is made of nylon material. The nylon material not only has insulating properties but also has excellent wear resistance, so that the phenomenon of insulation failure after long-term use can be avoided. Of course, the insulating block 310 can also be made of other suitable insulating materials such as rubber, plastic, or ceramic. At the same time, the first insulating gasket can also be made of the above-mentioned insulating materials, specifically, it can be made of nylon material.

[0050] See Figure 1 and Figure 2 , in some embodiments, the electromagnetic compatibility test device further includes a bearing seat assembly 400. The bearing seat assembly 400 includes an insulating bearing seat 410 and a bearing body 420. The insulating bearing seat 410 is disposed on the test seat 100 and has insulating properties. The bearing body 420 is disposed in the bearing seat hole of the insulating bearing seat 410. The dynamometer shaft 200 passes through the bearing hole of the bearing body 420. The addition of the bearing seat assembly 400 facilitates, on the one hand, the rotatable passing of the dynamometer shaft 200 through the test seat 100. On the other hand, since the insulating bearing seat 410 has insulating properties, it can provide an insulating barrier between the test seat 100 and the bearing body 420, and the bearing body 420 allows the dynamometer shaft 200 to pass through, that is, it can insulate the test seat 100 and the dynamometer shaft 200, thereby further improving the reliability of the EMC test results. Specifically, the insulating bearing seat 410 can be made of nylon. That is, the insulating bearing seat 410 is made of nylon material. Nylon material not only has insulating properties but also has excellent wear resistance. Of course, the insulating bearing seat 410 can also be made of other suitable insulating materials such as rubber, plastic, or ceramic.

[0051] In some embodiments, the insulating bearing seat 410 is disposed on the side of the test seat 100 facing away from the insulating connection assembly 300, and the bearing seat assembly 400 further includes a bearing seat cover body 430. The bearing seat cover body 430 is sleeved on the dynamometer shaft 200 and covers one end of the insulating bearing seat 410 away from the test seat 100. This enables the test seat 100 and the bearing seat cover body 430 to respectively close the bearing seat hole from both ends of the insulating bearing seat 410 to stop the bearing body 420 at both ends. Of course, both the test seat 100 and the bearing seat cover body 430 should leave through holes for the dynamometer shaft body 210 of the dynamometer shaft 200 to pass through. Specifically, the insulating bearing seat 410 can be fixedly connected to the test seat 100 through a third fastener. The insulating bearing seat 410 is provided with a third through hole 411 for the third fastener to pass through on the outside of the bearing seat hole. The diameter of the third through hole 411 is larger than the shaft diameter of the shank portion of the third fastener and smaller than the shaft diameter of the pressing head of the third fastener. The test seat 100 is provided with a fourth threaded hole corresponding to the third through hole 411. The third fastener passes through the third through hole 411 and is inserted into the fourth threaded hole of the test seat 100 and is threadedly connected to the inner wall of the fourth threaded hole, so that the third fastener can achieve electrical insulation from the insulating bearing seat 410 on the shank portion. In addition, a third insulating gasket can be provided between the pressing head of the third fastener and the insulating bearing seat 410, so that the third fastener can achieve electrical insulation from the insulating bearing seat 410 on the pressing head. The third insulating gasket can also be made of other suitable insulating materials such as nylon, rubber, plastic, or ceramic. More specifically, a third counterbore for placing the third insulating gasket is formed on the periphery of the third through hole 411.

[0052] As Figure 2 shown, in some embodiments, the bearing seat cover body 430 includes a cover body and a boss portion 431. The cover body is used for being attached to the end face of the insulating bearing seat 410, and the boss portion 431 is disposed on the side of the cover body facing the insulating bearing seat 410 and can extend into the bearing seat hole of the insulating bearing seat 410 for clamping. The addition of the boss portion 431 can ensure the stability of the bearing seat cover body 430 when installed on the insulating bearing seat 410. Specifically, the bearing seat cover body 430 can be made of a metal part, the insulating bearing seat 410 is made of an elastic insulating part, and the boss portion 431 can extend into the bearing seat hole of the insulating bearing seat 410 and be clamped by expanding the insulating bearing seat 410.

[0053] Please refer to again Figure 1In some embodiments, the electromagnetic compatibility test device further includes an insulating base plate 500 having insulating properties, and the insulating base plate 500 is placed between the test table and the test socket 100. That is, by adding the insulating base plate 500, it is possible to perform an insulation barrier between the test table and the test socket 100, thereby further improving the reliability of the EMC test results. Furthermore, the insulating base plate 500 can be set as a nylon part. That is, the insulating base plate 500 is made of nylon material, which not only has insulating properties, but also has excellent wear resistance. Of course, the insulating base plate 500 can also be made of other suitable insulating materials such as rubber, plastic or ceramic.

[0054] In some embodiments, the test seat 100 includes a test base plate 110 and a test stand plate 120, the test base plate 110 can be placed flat on the insulating base plate 500, the test stand plate 120 is vertically extended on the side of the test base plate 110 away from the insulating base plate 500, the dynamometer shaft 200 is rotatably passed through the test stand plate 120, and the test base plate 110, the insulating base plate 500 and the test table are fixedly connected by a second fastener. The addition of the test base plate 110 can facilitate the stacking and series connection of the test seat 100, the insulating base plate 500 and the test table, and the second fastener can facilitate disassembly and assembly.

[0055] In some embodiments, the test base plate 110 and the insulating base plate 500 are both provided with a second through hole, and the test table is provided with a third threaded hole, the aperture of the second through hole is larger than the axial diameter of the shaft of the second fastener and smaller than the axial diameter of the clamping head of the second fastener, and the inner wall of the third threaded hole can be threadedly connected with the second fastener. The addition of the second through hole can make the test base plate 110 and the insulating base plate 500 both spaced apart from the shaft of the second fastener in the circumferential direction, so as to further increase the insulation area, and the addition of the third threaded hole can facilitate the fastening connection between the test table and the first fastener, and accordingly, in order to realize the threaded connection between the inner wall of the third threaded hole and the second fastener, the second fastener can be set as a bolt, a screw, etc., and it also needs to be locked with a nut. Of course, the utility model is not limited to this, and the second fastener can also be set as a rivet or a pin, etc.

[0056] In some embodiments, a second insulating gasket 111 is further provided between the clamping head of the second fastener and the test base plate 110. That is, by adding the second insulating gasket 111, the clamping head of the second fastener and the test base plate 110 can also be insulated and blocked, so as to further increase the insulation area. Of course, the clamping head of the second fastener mentioned in the utility model can be the head of the second fastener itself, such as the head of a bolt, or a locking nut sleeved on the shaft of the second fastener.

[0057] In some embodiments, second through holes are formed in both the test base plate 110 and the insulating base plate 500, and a third threaded hole is formed in the test tabletop. The diameter of the second through hole is larger than the shaft diameter of the shank portion of the second fastener, and the inner wall of the third threaded hole can be threadedly connected to the second fastener. Moreover, a second insulating gasket 111 is provided between the pressing head of the second fastener and the test base plate 110. That is, the second fastener is tightly connected to the test tabletop, and not only is there insulation between the shank portion of the second fastener and the test base plate 110 and the insulating base plate 500, but also there is insulation between the pressing head of the second fastener and the test base plate 110, so that insulation is achieved at all positions between the test base plate 110 and the test tabletop. Specifically, a second counterbore for placing the second insulating gasket 111 is formed at the periphery of the second through hole of the test base plate 110.

[0058] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0059] In the present utility model, unless otherwise clearly defined and limited, terms such as "installed", "connected", "connected to", "fixed" and the like should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0060] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An electromagnetic compatibility test device for electric drive products, characterized in that: The electromagnetic compatibility testing device comprises: Test socket; A dynamometer shaft is rotatably disposed on the test seat; The insulating connection assembly comprises an insulating portion disposed between the dynamometer shaft and the motor shaft, wherein the insulating portion has insulating properties and can connect the dynamometer shaft and the motor shaft.

2. The electromagnetic compatibility testing device for electric drive products according to claim 1, characterized in that: The dynamometer shaft includes a dynamometer shaft body and a dynamometer disc body which are coaxially arranged in sequence, the shaft diameter of the dynamometer disc body is larger than the shaft diameter of the dynamometer shaft body, the dynamometer shaft body is rotatably passed through the test seat, the insulating connection assembly includes an insulating block and a first fastener, the insulating block is set as the insulating portion and is placed between a side of the dynamometer disc body away from the dynamometer shaft body and the motor disc body of the motor shaft, and the dynamometer disc body and the motor disc body are respectively connected to the insulating block via the first fastener.

3. The electromagnetic compatibility testing device for electric drive products according to claim 2, characterized in that: The insulating connection assembly further includes a first insulating gasket, which is sleeved on the first fastener and spaced apart from the pressing head of the first fastener and the dynamometer disc body or the motor disc body; And / or, at least one of the dynamometer disc body and the motor disc body is provided with a first through hole for the shaft of the first fastener to pass through, and the aperture of the first through hole is larger than the axial diameter of the shaft of the first fastener and smaller than the axial diameter of the clamping head of the first fastener.

4. The electromagnetic compatibility testing device for electric drive products according to claim 3, characterized in that: The insulating block is provided with a first connecting hole and a second connecting hole at intervals, the first through hole is provided on both the dynamometer disc body and the motor disc body, and the first through hole on the dynamometer disc body and the first through hole on the motor disc body are respectively arranged in one-to-one correspondence with the first connecting hole and the second connecting hole, the dynamometer disc body is passed through the corresponding first through hole by the first fastener and is penetrated into the first connecting hole to be fastened and connected to the insulating block, and the motor disc body is passed through the corresponding first through hole by the first fastener and is penetrated into the second connecting hole to be fastened and connected to the insulating block.

5. The electromagnetic compatibility testing device for electric drive products according to claim 1, characterized in that: The insulating block is made of nylon.

6. The electromagnetic compatibility testing device for electric drive products according to claim 1, characterized in that: The electromagnetic compatibility testing device also includes a bearing seat assembly, which includes an insulating bearing seat and a bearing body. The insulating bearing seat is arranged on the test seat and has insulating properties. The bearing body is arranged in a bearing seat hole of the insulating bearing seat, and the dynamometer shaft is passed through the bearing hole of the bearing body.

7. The electromagnetic compatibility testing device for electric drive products according to claim 6, characterized in that: The insulating bearing seat is arranged on a side of the test seat away from the insulating connection assembly, and the bearing seat assembly also includes a bearing seat cover body, which is sleeved on the dynamometer shaft and covers the end of the insulating bearing seat away from the test seat.

8. The electromagnetic compatibility test device for electric drive products according to any one of claims 1 to 7, characterized in that: The electromagnetic compatibility testing device further comprises an insulating bottom plate with insulating properties, and the insulating bottom plate is placed between the test table and the test seat.

9. The electromagnetic compatibility testing device for electric drive products according to claim 8, characterized in that: The test seat includes a test base plate and a test vertical plate. The test base plate can be placed flat on the insulating base plate. The test vertical plate is vertically extended on the side of the test base plate away from the insulating base plate. The dynamometer shaft can be rotatably passed through the test vertical plate, and the test base plate, the insulating base plate and the test table are fixedly connected by a second fastener.

10. The electromagnetic compatibility testing device for electric drive products according to claim 9, characterized in that: A second through hole is provided on both the test base plate and the insulating base plate, and a third threaded hole is provided on the test table top. The aperture of the second through hole is larger than the axial diameter of the shaft of the second fastener and smaller than the axial diameter of the clamping head of the second fastener, and the inner wall of the third threaded hole can be threadedly connected with the second fastener; and / or, a second insulating gasket is also provided between the clamping head of the second fastener and the test base plate.

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