A test fixture and test system

Abstract

The utility model discloses an embodiment relates to motor technical field, especially disclose a test fixture for testing motor under test, and test fixture includes dynamometer, fixed part, support and axle seat, and the utility model discloses an embodiment can avoid replacing whole test fixture.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a test fixture and a test system. Background Technology

[0002] The motor, as the core component of a scooter, provides power. There are many types of motors available for scooters today, and their structures and dimensions often differ. For example, there are significant differences between motors with and without disc brakes. Motor testing is achieved by mounting the motor under test onto a test fixture.

[0003] In the process of developing this utility model, the inventors discovered that each motor under test currently requires a set of matching test fixtures. When changing to a different type of motor under test, different test fixtures need to be changed, which results in high costs. Utility Model Content

[0004] This utility model provides a test fixture and a test system that can avoid replacing the entire test fixture.

[0005] To solve the above-mentioned technical problems, the present invention provides a test fixture for testing a motor under test. The test fixture includes a dynamometer, a fixing member, a bracket, and a shaft seat. The dynamometer includes a dynamometer shaft. The fixing member is detachably connected to the dynamometer shaft and is used to connect with the housing of the motor under test. The fixing member can drive the housing of the motor under test to rotate. The shaft seat is detachably disposed on the bracket and is used to connect with the shaft of the motor under test. The shaft seat restricts the rotation of the shaft of the motor under test.

[0006] Optionally, the fastener includes a disc and an extension, the edge of the disc extending along the thickness direction to form the extension, the disc and the extension enclosing a mounting space that matches the motor under test, the mounting space being used to mount the motor under test.

[0007] Optionally, the inner wall of the extension is provided with a snap-fit ​​groove for snapping into the gear teeth of the receiving motor.

[0008] Optionally, the test fixture also includes a coupling and a transmission component. The dynamometer shaft is inserted into one end of the coupling, and one end of the transmission component is inserted into the other end of the coupling. The other end of the transmission component is provided with a first fixing structure. The fixing component is provided with a second fixing structure, which is connected to the first fixing structure so that the transmission component can drive the fixing component to rotate.

[0009] Optionally, the first fixing structure includes a plurality of first limiting protrusions, which are arranged circumferentially along the transmission member, and a first limiting groove is formed between two adjacent first limiting protrusions; the second fixing structure includes a plurality of second limiting protrusions, which are arranged circumferentially along the fixing member, and a second limiting groove is formed between two adjacent second limiting protrusions; wherein, a first limiting protrusion is inserted into a second limiting groove, and a second limiting protrusion is inserted into a second limiting groove.

[0010] Optionally, the test fixture includes multiple first screw connectors, the fixing component is provided with multiple first screw holes, the transmission component is provided with multiple first connecting holes, and a first screw connector passes through a first connecting hole and is screwed into a first screw hole.

[0011] Optionally, the test fixture may also include a second screw connector, the fixing member having a second connecting hole, the second screw connector being used to pass through the second connecting hole and be screwed onto the housing of the motor under test; there are multiple second screw connectors and multiple second connecting holes, with one second screw connector passing through one second connecting hole.

[0012] Optionally, the bearing seat is provided with a fixing hole for accommodating the rotating shaft of the motor under test; the bearing seat is provided with a first limiting surface on the inner wall of the fixing hole, the first limiting surface is used to cooperate with a second limiting surface on the rotating shaft of the motor under test to limit the rotation of the rotating shaft of the motor under test.

[0013] Optionally, the test fixture may also include a third screw connector. The bracket is provided with multiple third connecting holes, and the shaft seat is provided with multiple third screw holes. A third screw connector passes through a third connecting hole and is screwed into a third screw hole.

[0014] To solve the above-mentioned technical problems, another technical solution adopted by this utility model is to provide a testing system, including the testing fixture as described in any of the above embodiments.

[0015] The beneficial effects of this utility model embodiment are as follows: Unlike existing technologies, this utility model embodiment provides a test fixture for testing a motor under test. The test fixture includes a dynamometer, a fixing member, a bracket, and a shaft seat. The dynamometer includes a dynamometer shaft. The fixing member is detachably connected to the dynamometer shaft and is used to connect to the housing of the motor under test. The fixing member can drive the housing of the motor under test to rotate. The shaft seat is detachably disposed on the bracket and is used to connect to the shaft of the motor under test, restricting the rotation of the shaft. During testing of the motor under test, the relative position of the bracket and the dynamometer remains unchanged. When testing different types of motors under test, different motors can be adapted by only changing the fixing member and the shaft seat, without replacing the entire test fixture. This reduces costs while still being able to test different types of motors under test. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a perspective view of the motor under test according to an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the working function of the test fixture according to an embodiment of the present invention;

[0019] Figure 3 This is an embodiment of the present utility model. Figure 2 Exploded view;

[0020] Figure 4 This is a perspective view of the fixing component according to an embodiment of the present utility model;

[0021] Figure 5 This is an embodiment of the present utility model. Figure 2 AA section view in the middle;

[0022] Figure 6 This is a perspective view of the transmission component according to an embodiment of the present utility model;

[0023] Figure 7 This is a perspective view of the bracket according to an embodiment of the present utility model;

[0024] Figure 8 This is an exploded view of the shaft seat according to an embodiment of the present utility model;

[0025] Figure 9 This is an embodiment of the present utility model. Figure 2 BB section view in the middle.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Test fixture;

[0028] 100. Dynamometer; 110. Dynamometer shaft;

[0029] 200. Fixing element; 210. Disc portion; 211. First screw hole; 212. Second limiting protrusion; 213. Second limiting groove; 214. First clearance hole; 215. Second connecting hole; 220. Extension portion; 221. Snap-fit ​​groove; 222. Snap-fit ​​portion;

[0030] 300, bracket; 310, base; 320, mounting plate; 321, clearance part; 322, third connecting hole; 330, support plate;

[0031] 400, Shaft seat; 410, Fixing hole; 420, First clamp; 421, First limiting surface; 422, Fourth screw hole; 423, Through hole; 430, Second clamp; 431, Mounting groove; 432, Third screw hole; 433, Fifth screw hole; 434, Mounting hole;

[0032] 500. Coupling;

[0033] 600, Transmission component; 610, First limiting protrusion; 620, First limiting groove; 630, First connecting hole; 640, Transmission shaft; 650, Second clearance hole;

[0034] 701. First screw connector; 702. Second screw connector; 703. Nut; 704. Third screw connector; 705. Fourth screw connector; 706. Fifth screw connector;

[0035] 2. The motor to be tested;

[0036] 800, housing; 810, sprocket; 811, gear tooth; 820, through hole; 900, shaft; 910, first shaft part; 920, second shaft part; 921, second limiting surface; 950, power cord. Detailed Implementation

[0037] To facilitate understanding of this utility model, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected" to another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0039] Please see Figure 1 The motor under test 2 includes a housing 800 and a rotating shaft 900. The housing 800 can rotate relative to the rotating shaft 900. The rotating shaft 900 includes a first shaft portion 910 and a second shaft portion 920 extending out of the housing 800. The first shaft portion 910 and the second shaft portion 920 are arranged opposite to each other, and the axis of the first shaft portion 910 and the axis of the second shaft portion 920 coincide.

[0040] Please see Figure 2 and Figure 3 The test fixture 1 includes a dynamometer 100, a fixture 200, a bracket 300, and a bearing 400. The dynamometer 100 and the fixture 200 are detachably connected, and the bearing 400 is detachably mounted on the bracket 300. The fixture 200 is used to fixably connect to the housing 800 of the motor under test 2, and the bearing 400 is used to fixably connect to the rotating shaft 900 of the motor under test 2. The bearing 400 restricts the rotation of the rotating shaft 900 of the motor under test 2. Driven by the motor under test 2, the housing 800 of the motor under test 2 rotates, and the dynamometer 100 applies a reverse force to the rotating shaft 900 of the motor under test 2 through the fixture 200. When different types of motors under test 2 need to be tested, the motor under test 2 is first separated from the fixture 200 and the bearing 400 respectively, and then the fixture 200 on the dynamometer 100 and the bearing 400 on the bracket 300 are replaced. In this way, when testing different types of motors under test 2, it is not necessary to replace the entire test fixture 1. This not only makes replacement convenient, but also, compared to having multiple sets of spare test fixtures 1 for various types, this embodiment of the invention only requires multiple sets of fixing parts 200 and multiple sets of shaft seats 400 for backup, thereby reducing production and maintenance costs.

[0041] It should be noted that the fastener 200 is used to connect the housing 800 of the motor under test 2 to the end where the first shaft portion 910 is located, and the bearing 400 is used to connect the second shaft portion 920 of the motor under test 2.

[0042] It is understandable that after the motor under test 2 is installed, the relative positions between the bracket 300 and the dynamometer 100 remain unchanged. Based on this, the bracket 300 and the dynamometer 100 can be fixed on the same mounting base, which can be the ground, a table, a test bench, or other structures that can provide support.

[0043] The dynamometer 100 described above is used to measure torque. Please refer to... Figure 2 and Figure 3 The dynamometer 100 includes a dynamometer shaft 110, which is used to apply a reverse force to the motor under test 2. The motor under test 2 rotates against the reverse force, thereby meeting the load requirements of the motor under test 2.

[0044] For the aforementioned fastener 200, please refer to... Figure 3 and Figure 4The fixing member 200 is detachably connected to the dynamometer shaft 110, which can drive the fixing member 200 to rotate. The fixing member 200 includes a disc portion 210 and an extension portion 220. The extension portion 220 extends from the edge of the disc portion 210 along the thickness direction of the disc portion 210. The disc portion 210 and the extension portion 220 enclose a mounting space that matches the motor under test 2, so as to accommodate different motors under test 2. It is understood that the housing 800 of different types of motors under test 2 has different shapes and sizes, and the user can select the fixing member 200 whose mounting space can accommodate the motor under test 2 according to actual needs.

[0045] In some embodiments, combined with Figure 1 The housing 800 of the motor under test 2 is provided with multiple through holes 820, and the disc portion 210 is provided with multiple second connecting holes 215 evenly arranged circumferentially. The test fixture 1 also includes multiple second screw connectors 702 and multiple nuts 703. A second screw connector 702 passes through the through hole 820 and the second connecting hole 215 and is screwed onto a nut 703. The second screw connector 702 can not only cooperate with the nut 703 to play a fixing role, but also force the fixing member 200 to rotate synchronously with the housing 800 of the motor under test 2. It can be understood that the screwing method of the second screw connector 702 is not limited to this. The housing 800 of the motor under test 2 can also be provided with multiple second screw holes (not shown in the figure), and a second screw connector 702 passes through a second connecting hole 215 and is screwed onto a second screw hole.

[0046] Combination Figure 1 and Figure 5 When the motor under test 2 has a sprocket 810, in order to make the fixing member 200 and the housing 800 of the motor under test 2 rotate synchronously, multiple snap-fit ​​grooves 221 can be provided on the inner wall of the extension 220, and a snap-fit ​​part 222 protruding from the inner wall of the extension 220 is formed between two adjacent snap-fit ​​grooves 221. One snap-fit ​​groove 221 is used to snap a tooth 811 of the sprocket 810, and one snap-fit ​​part 222 is snapped into a tooth groove of the sprocket 810, so that the fixing member 200 can drive the housing 800 of the motor under test 2 to rotate.

[0047] In some embodiments, combined with Figure 6 The test fixture 1 also includes a coupling 500 and a transmission component 600. One end of the transmission component 600 is provided with a transmission shaft 640, and the other end is provided with a first fixing structure. The transmission shaft 640 is inserted into one end of the coupling 500, and the dynamometer shaft 110 is inserted into the other end of the coupling 500. A second fixing structure is provided in the central area of ​​the disc portion 210, and the second fixing structure and the extension portion 220 are respectively located on both sides of the disc portion 210. The first fixing structure is connected to the second fixing structure so that the dynamometer shaft 110 can drive the fixing component 200 to rotate. The transmission component 600 and the coupling 500 are easily disassembled and assembled, facilitating the replacement of the fixing component 200.

[0048] The first fixing structure includes multiple first limiting protrusions 610, which are arranged circumferentially along the transmission member 600, and a first limiting groove 620 is formed between two adjacent first limiting protrusions 610. The second fixing structure includes multiple second limiting protrusions 212 and multiple second limiting grooves 213, which are arranged circumferentially along the disc portion 210, and a second limiting groove 213 is formed between two adjacent second limiting protrusions 212. A first limiting protrusion 610 is inserted into a second limiting groove 213, and a second limiting protrusion 212 is inserted into a first limiting groove 620. With this arrangement, the transmission member 600 can drive the fixing member 200 to rotate, and the first fixing structure and the second fixing structure can be connected or separated by a plugging and unplugging operation, thereby improving the efficiency of replacing the fixing member 200. It is understandable that the connection method between the first fixed structure and the second fixed structure is not limited to this. The first fixed structure and the second fixed structure can also be a snap-fit ​​structure or other plug-in structure, as long as the transmission component 600 and the fixed component 200 can rotate synchronously.

[0049] Furthermore, the fixing member 200 is provided with multiple first screw holes 211, one of which is located at a second limiting protrusion 212. The transmission member 600 is provided with multiple first connecting holes 630, one of which passes through a first limiting groove 620. The test fixture 1 also includes multiple first screw connectors 701, one of which passes through a first connecting hole 630 and is screwed into a first screw hole 211. In this way, the first screw connectors 701 realize a detachable connection between the fixing member 200 and the transmission member 600, and enable the fixing member 200 and the transmission member 600 to rotate synchronously.

[0050] To accommodate different types of motors under test 2, the distance between the snap-fit ​​groove 221 and the disk portion 210 can be selected according to the actual situation to accommodate the protruding structure of the housing 800 on the side where the first shaft portion 910 is located. Furthermore, the fixing member 200 is also provided with a first clearance hole 214, which penetrates the disk portion 210 and the second fixing structure to avoid the first shaft portion 910 of the motor under test 2 and the protruding structure of the housing 800 on the side where the first shaft portion 910 is located. Optionally, the transmission member 600 is also provided with a second clearance hole 650, which penetrates the transmission member 600 and communicates with the first clearance hole 214 to avoid the first shaft portion 910 of the motor under test 2.

[0051] For the aforementioned bracket 300, please refer to... Figure 3 and Figure 7The bracket 300 includes a base 310, a mounting plate 320, and a support plate 330. The base 310 is used to mount the mounting base, the mounting plate 320 is used to mount the bearing 400, and the mounting plate 320 is connected to the base plate. The support plate 330 is connected to the mounting plate 320 and the mounting plate 320 respectively to improve the strength of the bracket 300.

[0052] When the power line 950 is provided on the side where the second shaft 920 of the motor under test 2 is located (reference) Figure 1 To provide space for the power cord 950, the mounting plate 320 is provided with a clearance portion 321. The clearance portion 321 extends through the mounting plate 320 along its thickness direction, allowing the power cord 950 to pass through. Furthermore, when the motor under test 2 is installed and the second shaft portion 920 extends out of the bearing seat 400, the clearance portion 321 can also be used to avoid interference between the second shaft portion 920 and the mounting plate 320.

[0053] For the aforementioned bearing 400, please refer to... Figure 3 and Figure 8 and combined Figure 9The bearing seat 400 includes a first clamp 420 and a second clamp 430, with the second clamp 430 having a mounting groove 431. The second clamp 430 is detachably connected to the mounting plate 320, and the first clamp 420 is located at the opening of the mounting groove 431. The first clamp 420 and the second clamp 430 are detachably connected and enclose each other to form a fixing hole 410, which is used to accommodate the second shaft portion 920 of the motor under test 2. The first clamp 420 has a first limiting surface 421 on the side facing the mounting groove 431, and the second shaft portion 920 of the motor under test 2 has a second limiting surface 921 on its side wall. The first limiting surface 421 fits against the second limiting surface 921 of the second shaft portion 920 to restrict the rotation of the second shaft portion 920. Different types of motors under test 2 may have different types of second shaft portions 920. When replacing different motors under test 2, the corresponding suitable bearing seat 400 can be replaced. Furthermore, the detachable connection between the first clamp 420 and the second clamp 430 allows the second clamp 430 to be assembled first when installing the second shaft portion 920 of the motor under test 2 into the fixing hole 410. Then, the second shaft portion 920 can be placed in the second mounting groove 431. At this time, the second clamp 430 provides support for the second shaft portion 920 of the motor under test 2, facilitating assembly. Finally, the first mounting groove 431 is aligned with the second mounting groove 431 before assembling the first clamp 420. This assembly process eliminates the need to align the second shaft portion 920 with the fixing hole 410, and it eliminates the need to insert the second shaft portion 920 of the motor under test 2 into the fixing hole 410 axially, reducing assembly difficulty and improving assembly efficiency. Optionally, the number of first limiting surfaces 421 is the same as the number of second limiting surfaces 921, which can be selected according to actual needs.

[0054] In some embodiments, the second clamp 430 is provided with a plurality of third screw holes 432, the mounting plate 320 is provided with a plurality of third connecting holes 322, and the test fixture 1 further includes a plurality of third screw connectors 704, each of which passes through a third connecting hole 322 and is screwed into a third screw hole 432. The assembly and disassembly of the shaft seat 400 can be achieved by tightening or loosening the third screw connectors 704, making the operation simple and quick.

[0055] In some embodiments, the first clamp 420 is provided with a fourth screw hole 422, which penetrates the first limiting surface 421 of the first clamp 420. The test fixture 1 also includes a fourth screw connector 705, which is screwed into the fourth screw hole 422 and abuts against the second limiting surface 921 of the second shaft portion 920 within the fixing hole 410. With the first limiting surface 421 and the second limiting surface 921 mutually abutting each other to restrict the rotation of the second shaft portion 920, the fourth screw connector 705 further restricts the rotation of the second shaft portion 920, reducing the risk of loosening of the connection between the second shaft portion 920 and the fixing hole 410, thereby ensuring the accuracy of the test results. It is understood that the fourth screw connector 705 and the first limiting surface 421 can be selectively provided, or both can be provided simultaneously; the user can choose according to the situation.

[0056] In some embodiments, the first clamp 420 is provided with a plurality of through holes 423, the second clamp 430 is provided with a plurality of fifth screw holes 433, and the test fixture 1 further includes a plurality of fifth screw connectors 706, wherein a fifth screw connector 706 passes through a through hole 423 and is screwed into a fifth screw hole 433. It is understood that the fixing method between the first clamp 420 and the second clamp 430 is not limited to this, as long as the first clamp 420 and the second clamp 430 can be detachably connected.

[0057] In some embodiments, the second bearing 400 is provided with a mounting hole 434 that penetrates the second bearing 400 and communicates with the clearance portion 321, so that the power line 950 of the motor under test 2 passes through the mounting hole 434 and the clearance portion 321 in sequence, thereby allowing the power line 950 to extend out of the test fixture 1.

[0058] It is understandable that the arrangement of the bearing seat 400 is not limited to the combination of two independent components, the first clamp 420 and the second clamp 430. The first clamp 420 and the second clamp 430 can also be integrally formed.

[0059] In this embodiment of the invention, the test fixture 1 includes a dynamometer 100, a fixing member 200, a bracket 300, and a bearing seat 400. The dynamometer 100 includes a dynamometer shaft 110. The fixing member 200 is detachably connected to the dynamometer shaft 110 and is used to connect to the housing 800 of the motor under test 2. The fixing member 200 can drive the housing 800 of the motor under test 2 to rotate. The bearing seat 400 is detachably disposed on the bracket 300 and is used to rotatably connect to the rotating shaft 900 of the motor under test 2. When testing the motor under test 2, the relative position of the bracket 300 and the dynamometer 100 remains unchanged. When testing different types of motors under test 2, different motors under test 2 can be adapted by only replacing the fixing member 200 and the bearing seat 400, without replacing the entire test fixture 1, thus reducing costs while being able to test different types of motors under test 2.

[0060] This utility model provides an embodiment of a testing system, which includes the aforementioned testing fixture 1. The structure and function of the testing fixture 1 can be found in the above embodiment, and will not be repeated here.

[0061] It should be noted that while the preferred embodiments of this utility model are provided in the specification and accompanying drawings, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of this utility model; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of this utility model. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of this utility model specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A test fixture for testing a motor under test, the test fixture comprising: include: Dynamometer, including dynamometer shaft; A fixing member is detachably connected to the dynamometer shaft. The fixing member is used to connect with the housing of the motor under test, and the fixing member can drive the housing of the motor under test to rotate. support; A bearing seat is detachably mounted on the bracket. The bearing seat is used to connect with the rotating shaft of the motor under test, and the bearing seat restricts the rotation of the rotating shaft of the motor under test.

2. The test fixture according to claim 1, characterized in that, The fastener includes a disc portion and an extension portion. The edge of the disc portion extends along the thickness direction to form the extension portion. The disc portion and the extension portion enclose a mounting space that matches the motor under test. The mounting space is used to mount the motor under test.

3. The test fixture according to claim 2, characterized in that, The inner wall of the extension is provided with a snap-fit ​​groove, which is used to snap the gear teeth of the motor under test.

4. The test fixture according to claim 1, characterized in that, The test fixture also includes a coupling and a transmission component. The dynamometer shaft is inserted into one end of the coupling, and one end of the transmission component is inserted into the other end of the coupling. The other end of the transmission component is provided with a first fixing structure. The fixing member is provided with a second fixing structure, which is connected to the first fixing structure so that the transmission member can drive the fixing member to rotate.

5. The test fixture according to claim 4, characterized in that, The first fixing structure includes a plurality of first limiting protrusions, which are arranged along the circumference of the transmission member, and a first limiting groove is formed between two adjacent first limiting protrusions. The second fixing structure includes a plurality of second limiting protrusions, which are arranged circumferentially along the fixing member, and a second limiting groove is formed between two adjacent second limiting protrusions; Wherein, a first limiting protrusion is inserted into a second limiting groove, and a second limiting protrusion is inserted into a second limiting groove.

6. The test fixture according to claim 4, characterized in that, The test fixture includes a plurality of first screw connectors, the fixing member is provided with a plurality of first screw holes, the transmission member is provided with a plurality of first connecting holes, and a first screw connector passes through a first connecting hole and is screwed into a first screw hole.

7. The test fixture according to claim 1, characterized in that, The test fixture also includes a second screw connector, and the fixing member is provided with a second connecting hole. The second screw connector is used to pass through the second connecting hole and be screwed into the housing of the motor under test. There are multiple second screw connectors and multiple second connecting holes, with one second screw connector passing through one second connecting hole.

8. The test fixture according to any one of claims 1 to 7, characterized in that, The bearing seat is provided with a fixing hole for accommodating the rotating shaft of the motor under test; The bearing seat has a first limiting surface on the inner wall of the fixing hole. The first limiting surface is used to cooperate with a second limiting surface on the shaft of the motor under test to restrict the rotation of the shaft of the motor under test.

9. The test fixture according to any one of claims 1 to 7, characterized in that, The test fixture also includes a third screw connector. The bracket is provided with multiple third connecting holes, and the bearing is provided with multiple third screw holes. One of the third screw connectors passes through one of the third connecting holes and is screwed into one of the third screw holes.

10. A testing system, characterized in that, Includes the test fixture as described in any one of claims 1-9.

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