Differential coil electromagnetic force testing device

Abstract

The utility model discloses a differential coil electromagnetic force testing device, which comprises an upper plate, a lower plate and a testing plate, a chute is arranged at the center of the lower plate, an embedded block and at least two expansion blocks which are matched with each other are arranged in the chute, one side of the embedded block, facing the expansion blocks, is inclined downwards, one end of the expansion blocks, facing the embedded block, is inclined upwards, and the testing plate is arranged in the chute. The end, away from the embedded block, of the expansion block abuts against the inner wall of the tested coil, the testing plate is fixed between the upper supporting plate and the upper plate, and a lower fixing screw is arranged on the embedded block in a penetrating mode and is in threaded fit with the lower plate. According to the differential coil electromagnetic force testing device, the embedded block is adopted to push the expansion block to move along the sliding groove and abut against and clamp the tested coil, the differential coil electromagnetic force testing device adapts to the tested coils of different sizes and is good in adaptability, the upper plate and the upper supporting plate are used for clamping and pressing the top of the tested coil, the tested coil is firmly limited, the tested coil is prevented from loosening, and the testing efficiency is improved. The fixing effect is good.

Description

Technical Field

[0001] The utility model relates to an electromagnetic testing technology, in particular to an electromagnetic force testing device for a differential coil. Background Art

[0002] With the continuous development of automobile technology, differentials will play a vital role in the future. On the one hand, electric vehicles are usually driven by a single motor, so the role of the differential can be achieved through an electronic control system; on the other hand, with the further development of autonomous driving technology, differentials may be combined with other transmission components to achieve a more intelligent driving mode.

[0003] During the development process or before leaving the factory, the differential needs to use an electromagnetic force testing device to detect the electromagnetic force generated by the differential coil at different voltages and temperatures. The existing testing method is generally to place the coil to be tested on a test device with matching size for power-on testing. When the size of the coil to be tested changes, a new test device needs to be replaced, which has poor adaptability and high cost. In addition, the volume of the coil to be tested will change when the temperature changes, and the coil to be tested will easily fall off the test device, resulting in poor positioning effect. Utility Model Content

[0004] In order to solve the defects of the prior art mentioned above, the utility model provides a differential coil electromagnetic force testing device, which can adapt to the tested coils of different sizes and firmly limit the tested coils with good fixing effect.

[0005] To achieve the above technical objectives, the utility model adopts the following technical solutions: a differential coil electromagnetic force testing device, installed on the testing equipment, comprising an upper plate, a lower plate and a test plate, a slide groove is provided at the center of the lower plate, an embedded block and at least two expansion blocks that cooperate with each other are provided in the slide groove, the embedded block is inclined downward toward one side of the expansion block, the expansion block is inclined upward toward one end of the embedded block, the expansion block is against the inner wall of the coil to be tested away from one end of the embedded block, the bottom of the coil to be tested is against the lower plate, the test plate is arranged above the coil to be tested and against the coil to be tested, the test plate is fixed between the upper support plate and the upper plate, and the upper support plate is arranged between the upper plate and the expansion block; a lower fixing screw is passed through the embedded block, the lower fixing screw cooperates with the lower plate thread, and tightening the lower fixing screw drives the embedded block to move downward and pushes the expansion block to move along the slide groove to press against the inner wall of the coil to be tested.

[0006] Preferably, the slide groove is cross-shaped, and expansion blocks are provided at the four ends of the slide groove.

[0007] Preferably, four guide posts are arranged around the lower plate, the guide posts pass through the lower plate and extend into the slide slot, and the guide posts abut against one end of the expansion block relative to the embedding block.

[0008] Preferably, a groove is provided at the center of the bottom of the upper plate, the top of the upper support plate fits in the groove, a protrusion is provided on the outer periphery of the bottom of the upper support plate, the test plate is sleeved on the upper support plate and the bottom abuts against the protrusion, the top of the test plate abuts against the bottom of the upper plate, and the upper plate and the upper support plate are fixed by upper screws.

[0009] Preferably, a positioning surface is provided on the top of the upper plate, a positioning column is provided at the center of the positioning surface, and the positioning column cooperates with the upper end of the testing equipment.

[0010] Preferably, screw holes are provided around the lower plate, and lower positioning screws are fitted on the screw holes, and the lower positioning screws lock the lower plate to the lower end of the testing device.

[0011] In summary, the utility model has achieved the following technical effects:

[0012] The differential coil electromagnetic force testing device of the utility model adopts an embedded block to push the expansion block to move along the slide groove, abuts against and clamps the coil to be tested, and is adaptable to coils of different sizes to be tested. The adaptability is good, and the test plate is clamped and pressed on the top of the coil to be tested by the upper plate and the upper support plate, so that the coil to be tested is firmly limited to prevent the coil to be tested from loosening, and the fixing effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional structural schematic diagram of the differential coil electromagnetic force testing device of the utility model;

[0014] Figure 2 It is a cross-sectional view of the differential coil electromagnetic force testing device of the utility model;

[0015] Explanation of the reference numerals in the specification: 1. upper screw; 2. upper plate; 3. upper support plate; 4. test plate; 5. coil under test; 6. lower fixing screw; 7. embedded block; 8. expansion block; 9. guide column; 10. lower plate; 11. lower positioning screw; 12. positioning surface. DETAILED DESCRIPTION

[0016] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0017] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0020] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] Embodiment 1:

[0023] like Figure 1-2, a differential coil electromagnetic force test device is installed on the test equipment, including an upper plate 2, a lower plate 10 and a test plate 4, a slide groove is provided at the center of the lower plate 10, and an embedded block 7 and at least two expansion blocks 8 that cooperate with each other are provided in the slide groove, the embedded block 7 is inclined downward toward one side of the expansion block 8, and the expansion block 8 is inclined upward toward one end of the embedded block 7, and the end of the expansion block 8 away from the embedded block 7 is against the inner wall of the coil 5 to be tested, and the bottom of the coil 5 to be tested is against the lower plate 10, and the test plate 4 is arranged above the coil 5 to be tested and with The coil 5 under test is against the upper plate 2, a groove is provided at the bottom center of the upper plate 2, the top of the upper support plate 3 fits in the groove, a protrusion is provided on the outer periphery of the bottom of the upper support plate 3, the test plate 4 is sleeved on the upper support plate 3 and the bottom is against the protrusion, the top of the test plate 4 is against the bottom of the upper plate 2, and the upper plate 2 and the upper support plate 3 are fixed by the upper screw 1; the embedded block 7 is penetrated by a lower fixing screw 6, and the lower fixing screw 6 is threadedly matched with the lower plate 10. Tightening the lower fixing screw 6 drives the embedded block 7 to move downward and pushes the expansion block 8 to move along the slide groove to press against the inner wall of the coil 5 under test.

[0024] In order to better clamp the measured coil 5 from the inside, the slide groove is cross-shaped, and expansion blocks 8 are provided at the four ends of the slide groove; the four expansion blocks 8 move outward to press against the inner wall of the measured coil 5 to achieve a firm locking of the measured coil 5.

[0025] Four guide posts 9 are arranged around the lower plate 10. The guide posts 9 pass through the lower plate 10 and extend into the slide slot. The guide posts 9 abut against one end of the expansion block 8 relative to the embedded block 7. The arrangement of the guide posts 9 can facilitate the reset of the expansion block 8.

[0026] A positioning surface 12 is provided on the top of the upper plate 2, and a positioning column is provided at the center of the positioning surface 12, and the positioning column cooperates with the upper end of the test equipment.

[0027] The lower plate 10 is provided with screw holes all around, and the screw holes are matched with lower positioning screws 11, and the lower positioning screws 11 lock the lower plate 10 to the lower end of the testing device.

[0028] During assembly, first place the expansion block 8 in the slide slot, and place the embedded block 7 between the four expansion blocks 8, and limit it on the lower plate 10 through the lower fixing screw 6, then place the coil 5 to be tested on the lower plate 10, the operator rotates the lower fixing screw 6, drives the embedded block 7 to move downward, pushes the expansion block 8 to move along the slide slot against the inner wall of the coil 5 to be tested, and adapts to the coils 5 of different sizes. At this time, the lower plate 10 is fixed to the lower end of the test equipment through the lower positioning screw 11, and then the test plate 4 is sleeved on the upper support plate 3, and the upper plate 2 and the upper support plate 3 are matched to fix the test plate 4, at this time, the upper plate 2 is fixed to the upper end of the test equipment through the positioning surface 12 and the positioning column, the test equipment works, so that the upper plate 2 and the test plate 4 are pressed down and against the coil 5 to be tested, and the coil 5 to be tested is energized for testing; after the test is completed, loosen the lower fixing screw 6, push the expansion block 8 to reset through the guide column 9, remove the tested coil 5, and install a new coil 5 to be tested, repeat the above operation, and realize the rapid fixation and detection of batches of coils 5 to be tested.

[0029] The differential coil electromagnetic force testing device of this embodiment adopts an embedded block 7 to push the expansion block 8 to move along the slide groove, abutting against and clamping the coil 5 to be tested, and is adaptable to the coil 5 to be tested of different sizes, with good adaptability. In addition, the test plate 4 is clamped and pressed on the top of the coil 5 to be tested by the upper plate 2 and the upper support plate 3, so that the coil 5 to be tested is firmly limited to prevent the coil 5 to be tested from loosening, and the fixing effect is good.

[0030] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A differential coil electromagnetic force testing device, installed on a testing device, characterized in that: The invention comprises an upper plate, a lower plate and a test plate, a slide groove is provided at the center of the lower plate, an embedded block and at least two expansion blocks which cooperate with each other are provided in the slide groove, the embedded block is inclined downward toward one side of the expansion block, the expansion block is inclined upward toward one end of the embedded block, the expansion block abuts against the inner wall of the coil under test at one end away from the embedded block, the bottom of the coil under test abuts against the lower plate, the test plate is arranged above the coil under test and abuts against the coil under test, the test plate is fixed between the upper support plate and the upper plate, and the upper support plate is arranged between the upper plate and the expansion block; a lower fixing screw is passed through the embedded block, the lower fixing screw cooperates with the thread of the lower plate, and tightening the lower fixing screw drives the embedded block to move downward and pushes the expansion block to move along the slide groove and abut against the inner wall of the coil under test.

2. A differential coil electromagnetic force testing device according to claim 1, characterized in that: The slide groove is in a cross shape, and expansion blocks are arranged at the four ends of the slide groove.

3. A differential coil electromagnetic force testing device according to claim 2, characterized in that: Four guide posts are arranged around the lower plate. The guide posts pass through the lower plate and extend into the slide slots. The guide posts abut against one end of the expansion block relative to the embedding block.

4. The differential coil electromagnetic force testing device according to claim 1, characterized in that: A groove is provided at the center of the bottom of the upper plate, the top of the upper support plate fits in the groove, a protrusion is provided on the outer periphery of the bottom of the upper support plate, the test plate is sleeved on the upper support plate and the bottom abuts against the protrusion, the top of the test plate abuts against the bottom of the upper plate, and the upper plate and the upper support plate are fixed by upper screws.

5. The differential coil electromagnetic force testing device according to claim 1, characterized in that: A positioning surface is provided on the top of the upper plate, a positioning column is provided at the center of the positioning surface, and the positioning column cooperates with the upper end of the testing equipment.

6. The differential coil electromagnetic force testing device according to claim 1, characterized in that: The lower plate is provided with screw holes around its periphery, and the screw holes are matched with lower positioning screws, and the lower positioning screws lock the lower plate to the lower end of the testing device.

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